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Merge tag 'regmap-fix-v5.11-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git...
[linux/fpc-iii.git] / drivers / platform / x86 / thinkpad_acpi.c
blobe03df2881dc6dfff51ebbd366892fd6f4c1f96e5
1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * thinkpad_acpi.c - ThinkPad ACPI Extras
4 *
5 * Copyright (C) 2004-2005 Borislav Deianov <borislav@users.sf.net>
6 * Copyright (C) 2006-2009 Henrique de Moraes Holschuh <hmh@hmh.eng.br>
7 */
8
9 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
10
11 #define TPACPI_VERSION "0.26"
12 #define TPACPI_SYSFS_VERSION 0x030000
13
14 /*
15 * Changelog:
16 * 2007-10-20 changelog trimmed down
17 *
18 * 2007-03-27 0.14 renamed to thinkpad_acpi and moved to
19 * drivers/misc.
20 *
21 * 2006-11-22 0.13 new maintainer
22 * changelog now lives in git commit history, and will
23 * not be updated further in-file.
24 *
25 * 2005-03-17 0.11 support for 600e, 770x
26 * thanks to Jamie Lentin <lentinj@dial.pipex.com>
27 *
28 * 2005-01-16 0.9 use MODULE_VERSION
29 * thanks to Henrik Brix Andersen <brix@gentoo.org>
30 * fix parameter passing on module loading
31 * thanks to Rusty Russell <rusty@rustcorp.com.au>
32 * thanks to Jim Radford <radford@blackbean.org>
33 * 2004-11-08 0.8 fix init error case, don't return from a macro
34 * thanks to Chris Wright <chrisw@osdl.org>
35 */
36
37 #include <linux/kernel.h>
38 #include <linux/module.h>
39 #include <linux/init.h>
40 #include <linux/types.h>
41 #include <linux/string.h>
42 #include <linux/list.h>
43 #include <linux/mutex.h>
44 #include <linux/sched.h>
45 #include <linux/sched/signal.h>
46 #include <linux/kthread.h>
47 #include <linux/freezer.h>
48 #include <linux/delay.h>
49 #include <linux/slab.h>
50 #include <linux/nvram.h>
51 #include <linux/proc_fs.h>
52 #include <linux/seq_file.h>
53 #include <linux/sysfs.h>
54 #include <linux/backlight.h>
55 #include <linux/bitops.h>
56 #include <linux/fb.h>
57 #include <linux/platform_device.h>
58 #include <linux/hwmon.h>
59 #include <linux/hwmon-sysfs.h>
60 #include <linux/input.h>
61 #include <linux/leds.h>
62 #include <linux/rfkill.h>
63 #include <linux/dmi.h>
64 #include <linux/jiffies.h>
65 #include <linux/workqueue.h>
66 #include <linux/acpi.h>
67 #include <linux/pci.h>
68 #include <linux/power_supply.h>
69 #include <sound/core.h>
70 #include <sound/control.h>
71 #include <sound/initval.h>
72 #include <linux/uaccess.h>
73 #include <acpi/battery.h>
74 #include <acpi/video.h>
75
76 /* ThinkPad CMOS commands */
77 #define TP_CMOS_VOLUME_DOWN 0
78 #define TP_CMOS_VOLUME_UP 1
79 #define TP_CMOS_VOLUME_MUTE 2
80 #define TP_CMOS_BRIGHTNESS_UP 4
81 #define TP_CMOS_BRIGHTNESS_DOWN 5
82 #define TP_CMOS_THINKLIGHT_ON 12
83 #define TP_CMOS_THINKLIGHT_OFF 13
84
85 /* NVRAM Addresses */
86 enum tp_nvram_addr {
87 TP_NVRAM_ADDR_HK2 = 0x57,
88 TP_NVRAM_ADDR_THINKLIGHT = 0x58,
89 TP_NVRAM_ADDR_VIDEO = 0x59,
90 TP_NVRAM_ADDR_BRIGHTNESS = 0x5e,
91 TP_NVRAM_ADDR_MIXER = 0x60,
92 };
93
94 /* NVRAM bit masks */
95 enum {
96 TP_NVRAM_MASK_HKT_THINKPAD = 0x08,
97 TP_NVRAM_MASK_HKT_ZOOM = 0x20,
98 TP_NVRAM_MASK_HKT_DISPLAY = 0x40,
99 TP_NVRAM_MASK_HKT_HIBERNATE = 0x80,
100 TP_NVRAM_MASK_THINKLIGHT = 0x10,
101 TP_NVRAM_MASK_HKT_DISPEXPND = 0x30,
102 TP_NVRAM_MASK_HKT_BRIGHTNESS = 0x20,
103 TP_NVRAM_MASK_LEVEL_BRIGHTNESS = 0x0f,
104 TP_NVRAM_POS_LEVEL_BRIGHTNESS = 0,
105 TP_NVRAM_MASK_MUTE = 0x40,
106 TP_NVRAM_MASK_HKT_VOLUME = 0x80,
107 TP_NVRAM_MASK_LEVEL_VOLUME = 0x0f,
108 TP_NVRAM_POS_LEVEL_VOLUME = 0,
109 };
110
111 /* Misc NVRAM-related */
112 enum {
113 TP_NVRAM_LEVEL_VOLUME_MAX = 14,
114 };
115
116 /* ACPI HIDs */
117 #define TPACPI_ACPI_IBM_HKEY_HID "IBM0068"
118 #define TPACPI_ACPI_LENOVO_HKEY_HID "LEN0068"
119 #define TPACPI_ACPI_LENOVO_HKEY_V2_HID "LEN0268"
120 #define TPACPI_ACPI_EC_HID "PNP0C09"
121
122 /* Input IDs */
123 #define TPACPI_HKEY_INPUT_PRODUCT 0x5054 /* "TP" */
124 #define TPACPI_HKEY_INPUT_VERSION 0x4101
125
126 /* ACPI \WGSV commands */
127 enum {
128 TP_ACPI_WGSV_GET_STATE = 0x01, /* Get state information */
129 TP_ACPI_WGSV_PWR_ON_ON_RESUME = 0x02, /* Resume WWAN powered on */
130 TP_ACPI_WGSV_PWR_OFF_ON_RESUME = 0x03, /* Resume WWAN powered off */
131 TP_ACPI_WGSV_SAVE_STATE = 0x04, /* Save state for S4/S5 */
132 };
133
134 /* TP_ACPI_WGSV_GET_STATE bits */
135 enum {
136 TP_ACPI_WGSV_STATE_WWANEXIST = 0x0001, /* WWAN hw available */
137 TP_ACPI_WGSV_STATE_WWANPWR = 0x0002, /* WWAN radio enabled */
138 TP_ACPI_WGSV_STATE_WWANPWRRES = 0x0004, /* WWAN state at resume */
139 TP_ACPI_WGSV_STATE_WWANBIOSOFF = 0x0008, /* WWAN disabled in BIOS */
140 TP_ACPI_WGSV_STATE_BLTHEXIST = 0x0001, /* BLTH hw available */
141 TP_ACPI_WGSV_STATE_BLTHPWR = 0x0002, /* BLTH radio enabled */
142 TP_ACPI_WGSV_STATE_BLTHPWRRES = 0x0004, /* BLTH state at resume */
143 TP_ACPI_WGSV_STATE_BLTHBIOSOFF = 0x0008, /* BLTH disabled in BIOS */
144 TP_ACPI_WGSV_STATE_UWBEXIST = 0x0010, /* UWB hw available */
145 TP_ACPI_WGSV_STATE_UWBPWR = 0x0020, /* UWB radio enabled */
146 };
147
148 /* HKEY events */
149 enum tpacpi_hkey_event_t {
150 /* Hotkey-related */
151 TP_HKEY_EV_HOTKEY_BASE = 0x1001, /* first hotkey (FN+F1) */
152 TP_HKEY_EV_BRGHT_UP = 0x1010, /* Brightness up */
153 TP_HKEY_EV_BRGHT_DOWN = 0x1011, /* Brightness down */
154 TP_HKEY_EV_KBD_LIGHT = 0x1012, /* Thinklight/kbd backlight */
155 TP_HKEY_EV_VOL_UP = 0x1015, /* Volume up or unmute */
156 TP_HKEY_EV_VOL_DOWN = 0x1016, /* Volume down or unmute */
157 TP_HKEY_EV_VOL_MUTE = 0x1017, /* Mixer output mute */
158
159 /* Reasons for waking up from S3/S4 */
160 TP_HKEY_EV_WKUP_S3_UNDOCK = 0x2304, /* undock requested, S3 */
161 TP_HKEY_EV_WKUP_S4_UNDOCK = 0x2404, /* undock requested, S4 */
162 TP_HKEY_EV_WKUP_S3_BAYEJ = 0x2305, /* bay ejection req, S3 */
163 TP_HKEY_EV_WKUP_S4_BAYEJ = 0x2405, /* bay ejection req, S4 */
164 TP_HKEY_EV_WKUP_S3_BATLOW = 0x2313, /* battery empty, S3 */
165 TP_HKEY_EV_WKUP_S4_BATLOW = 0x2413, /* battery empty, S4 */
166
167 /* Auto-sleep after eject request */
168 TP_HKEY_EV_BAYEJ_ACK = 0x3003, /* bay ejection complete */
169 TP_HKEY_EV_UNDOCK_ACK = 0x4003, /* undock complete */
170
171 /* Misc bay events */
172 TP_HKEY_EV_OPTDRV_EJ = 0x3006, /* opt. drive tray ejected */
173 TP_HKEY_EV_HOTPLUG_DOCK = 0x4010, /* docked into hotplug dock
174 or port replicator */
175 TP_HKEY_EV_HOTPLUG_UNDOCK = 0x4011, /* undocked from hotplug
176 dock or port replicator */
177
178 /* User-interface events */
179 TP_HKEY_EV_LID_CLOSE = 0x5001, /* laptop lid closed */
180 TP_HKEY_EV_LID_OPEN = 0x5002, /* laptop lid opened */
181 TP_HKEY_EV_TABLET_TABLET = 0x5009, /* tablet swivel up */
182 TP_HKEY_EV_TABLET_NOTEBOOK = 0x500a, /* tablet swivel down */
183 TP_HKEY_EV_TABLET_CHANGED = 0x60c0, /* X1 Yoga (2016):
184 * enter/leave tablet mode
185 */
186 TP_HKEY_EV_PEN_INSERTED = 0x500b, /* tablet pen inserted */
187 TP_HKEY_EV_PEN_REMOVED = 0x500c, /* tablet pen removed */
188 TP_HKEY_EV_BRGHT_CHANGED = 0x5010, /* backlight control event */
189
190 /* Key-related user-interface events */
191 TP_HKEY_EV_KEY_NUMLOCK = 0x6000, /* NumLock key pressed */
192 TP_HKEY_EV_KEY_FN = 0x6005, /* Fn key pressed? E420 */
193 TP_HKEY_EV_KEY_FN_ESC = 0x6060, /* Fn+Esc key pressed X240 */
194
195 /* Thermal events */
196 TP_HKEY_EV_ALARM_BAT_HOT = 0x6011, /* battery too hot */
197 TP_HKEY_EV_ALARM_BAT_XHOT = 0x6012, /* battery critically hot */
198 TP_HKEY_EV_ALARM_SENSOR_HOT = 0x6021, /* sensor too hot */
199 TP_HKEY_EV_ALARM_SENSOR_XHOT = 0x6022, /* sensor critically hot */
200 TP_HKEY_EV_THM_TABLE_CHANGED = 0x6030, /* windows; thermal table changed */
201 TP_HKEY_EV_THM_CSM_COMPLETED = 0x6032, /* windows; thermal control set
202 * command completed. Related to
203 * AML DYTC */
204 TP_HKEY_EV_THM_TRANSFM_CHANGED = 0x60F0, /* windows; thermal transformation
205 * changed. Related to AML GMTS */
206
207 /* AC-related events */
208 TP_HKEY_EV_AC_CHANGED = 0x6040, /* AC status changed */
209
210 /* Further user-interface events */
211 TP_HKEY_EV_PALM_DETECTED = 0x60b0, /* palm hoveres keyboard */
212 TP_HKEY_EV_PALM_UNDETECTED = 0x60b1, /* palm removed */
213
214 /* Misc */
215 TP_HKEY_EV_RFKILL_CHANGED = 0x7000, /* rfkill switch changed */
216 };
217
218 /****************************************************************************
219 * Main driver
220 */
221
222 #define TPACPI_NAME "thinkpad"
223 #define TPACPI_DESC "ThinkPad ACPI Extras"
224 #define TPACPI_FILE TPACPI_NAME "_acpi"
225 #define TPACPI_URL "http://ibm-acpi.sf.net/"
226 #define TPACPI_MAIL "ibm-acpi-devel@lists.sourceforge.net"
227
228 #define TPACPI_PROC_DIR "ibm"
229 #define TPACPI_ACPI_EVENT_PREFIX "ibm"
230 #define TPACPI_DRVR_NAME TPACPI_FILE
231 #define TPACPI_DRVR_SHORTNAME "tpacpi"
232 #define TPACPI_HWMON_DRVR_NAME TPACPI_NAME "_hwmon"
233
234 #define TPACPI_NVRAM_KTHREAD_NAME "ktpacpi_nvramd"
235 #define TPACPI_WORKQUEUE_NAME "ktpacpid"
236
237 #define TPACPI_MAX_ACPI_ARGS 3
238
239 /* Debugging printk groups */
240 #define TPACPI_DBG_ALL 0xffff
241 #define TPACPI_DBG_DISCLOSETASK 0x8000
242 #define TPACPI_DBG_INIT 0x0001
243 #define TPACPI_DBG_EXIT 0x0002
244 #define TPACPI_DBG_RFKILL 0x0004
245 #define TPACPI_DBG_HKEY 0x0008
246 #define TPACPI_DBG_FAN 0x0010
247 #define TPACPI_DBG_BRGHT 0x0020
248 #define TPACPI_DBG_MIXER 0x0040
249
250 #define onoff(status, bit) ((status) & (1 << (bit)) ? "on" : "off")
251 #define enabled(status, bit) ((status) & (1 << (bit)) ? "enabled" : "disabled")
252 #define strlencmp(a, b) (strncmp((a), (b), strlen(b)))
253
254
255 /****************************************************************************
256 * Driver-wide structs and misc. variables
257 */
258
259 struct ibm_struct;
260
261 struct tp_acpi_drv_struct {
262 const struct acpi_device_id *hid;
263 struct acpi_driver *driver;
264
265 void (*notify) (struct ibm_struct *, u32);
266 acpi_handle *handle;
267 u32 type;
268 struct acpi_device *device;
269 };
270
271 struct ibm_struct {
272 char *name;
273
274 int (*read) (struct seq_file *);
275 int (*write) (char *);
276 void (*exit) (void);
277 void (*resume) (void);
278 void (*suspend) (void);
279 void (*shutdown) (void);
280
281 struct list_head all_drivers;
282
283 struct tp_acpi_drv_struct *acpi;
284
285 struct {
286 u8 acpi_driver_registered:1;
287 u8 acpi_notify_installed:1;
288 u8 proc_created:1;
289 u8 init_called:1;
290 u8 experimental:1;
291 } flags;
292 };
293
294 struct ibm_init_struct {
295 char param[32];
296
297 int (*init) (struct ibm_init_struct *);
298 umode_t base_procfs_mode;
299 struct ibm_struct *data;
300 };
301
302 static struct {
303 u32 bluetooth:1;
304 u32 hotkey:1;
305 u32 hotkey_mask:1;
306 u32 hotkey_wlsw:1;
307 enum {
308 TP_HOTKEY_TABLET_NONE = 0,
309 TP_HOTKEY_TABLET_USES_MHKG,
310 TP_HOTKEY_TABLET_USES_GMMS,
311 } hotkey_tablet;
312 u32 kbdlight:1;
313 u32 light:1;
314 u32 light_status:1;
315 u32 bright_acpimode:1;
316 u32 bright_unkfw:1;
317 u32 wan:1;
318 u32 uwb:1;
319 u32 fan_ctrl_status_undef:1;
320 u32 second_fan:1;
321 u32 second_fan_ctl:1;
322 u32 beep_needs_two_args:1;
323 u32 mixer_no_level_control:1;
324 u32 battery_force_primary:1;
325 u32 input_device_registered:1;
326 u32 platform_drv_registered:1;
327 u32 platform_drv_attrs_registered:1;
328 u32 sensors_pdrv_registered:1;
329 u32 sensors_pdrv_attrs_registered:1;
330 u32 sensors_pdev_attrs_registered:1;
331 u32 hotkey_poll_active:1;
332 u32 has_adaptive_kbd:1;
333 } tp_features;
334
335 static struct {
336 u16 hotkey_mask_ff:1;
337 u16 volume_ctrl_forbidden:1;
338 } tp_warned;
339
340 struct thinkpad_id_data {
341 unsigned int vendor; /* ThinkPad vendor:
342 * PCI_VENDOR_ID_IBM/PCI_VENDOR_ID_LENOVO */
343
344 char *bios_version_str; /* Something like 1ZET51WW (1.03z) */
345 char *ec_version_str; /* Something like 1ZHT51WW-1.04a */
346
347 u32 bios_model; /* 1Y = 0x3159, 0 = unknown */
348 u32 ec_model;
349 u16 bios_release; /* 1ZETK1WW = 0x4b31, 0 = unknown */
350 u16 ec_release;
351
352 char *model_str; /* ThinkPad T43 */
353 char *nummodel_str; /* 9384A9C for a 9384-A9C model */
354 };
355 static struct thinkpad_id_data thinkpad_id;
356
357 static enum {
358 TPACPI_LIFE_INIT = 0,
359 TPACPI_LIFE_RUNNING,
360 TPACPI_LIFE_EXITING,
361 } tpacpi_lifecycle;
362
363 static int experimental;
364 static u32 dbg_level;
365
366 static struct workqueue_struct *tpacpi_wq;
367
368 enum led_status_t {
369 TPACPI_LED_OFF = 0,
370 TPACPI_LED_ON,
371 TPACPI_LED_BLINK,
372 };
373
374 /* tpacpi LED class */
375 struct tpacpi_led_classdev {
376 struct led_classdev led_classdev;
377 int led;
378 };
379
380 /* brightness level capabilities */
381 static unsigned int bright_maxlvl; /* 0 = unknown */
382
383 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
384 static int dbg_wlswemul;
385 static bool tpacpi_wlsw_emulstate;
386 static int dbg_bluetoothemul;
387 static bool tpacpi_bluetooth_emulstate;
388 static int dbg_wwanemul;
389 static bool tpacpi_wwan_emulstate;
390 static int dbg_uwbemul;
391 static bool tpacpi_uwb_emulstate;
392 #endif
393
394
395 /*************************************************************************
396 * Debugging helpers
397 */
398
399 #define dbg_printk(a_dbg_level, format, arg...) \
400 do { \
401 if (dbg_level & (a_dbg_level)) \
402 printk(KERN_DEBUG pr_fmt("%s: " format), \
403 __func__, ##arg); \
404 } while (0)
405
406 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
407 #define vdbg_printk dbg_printk
408 static const char *str_supported(int is_supported);
409 #else
410 static inline const char *str_supported(int is_supported) { return ""; }
411 #define vdbg_printk(a_dbg_level, format, arg...) \
412 do { if (0) no_printk(format, ##arg); } while (0)
413 #endif
414
415 static void tpacpi_log_usertask(const char * const what)
416 {
417 printk(KERN_DEBUG pr_fmt("%s: access by process with PID %d\n"),
418 what, task_tgid_vnr(current));
419 }
420
421 #define tpacpi_disclose_usertask(what, format, arg...) \
422 do { \
423 if (unlikely((dbg_level & TPACPI_DBG_DISCLOSETASK) && \
424 (tpacpi_lifecycle == TPACPI_LIFE_RUNNING))) { \
425 printk(KERN_DEBUG pr_fmt("%s: PID %d: " format), \
426 what, task_tgid_vnr(current), ## arg); \
427 } \
428 } while (0)
429
430 /*
431 * Quirk handling helpers
432 *
433 * ThinkPad IDs and versions seen in the field so far are
434 * two or three characters from the set [0-9A-Z], i.e. base 36.
435 *
436 * We use values well outside that range as specials.
437 */
438
439 #define TPACPI_MATCH_ANY 0xffffffffU
440 #define TPACPI_MATCH_ANY_VERSION 0xffffU
441 #define TPACPI_MATCH_UNKNOWN 0U
442
443 /* TPID('1', 'Y') == 0x3159 */
444 #define TPID(__c1, __c2) (((__c1) << 8) | (__c2))
445 #define TPID3(__c1, __c2, __c3) (((__c1) << 16) | ((__c2) << 8) | (__c3))
446 #define TPVER TPID
447
448 #define TPACPI_Q_IBM(__id1, __id2, __quirk) \
449 { .vendor = PCI_VENDOR_ID_IBM, \
450 .bios = TPID(__id1, __id2), \
451 .ec = TPACPI_MATCH_ANY, \
452 .quirks = (__quirk) }
453
454 #define TPACPI_Q_LNV(__id1, __id2, __quirk) \
455 { .vendor = PCI_VENDOR_ID_LENOVO, \
456 .bios = TPID(__id1, __id2), \
457 .ec = TPACPI_MATCH_ANY, \
458 .quirks = (__quirk) }
459
460 #define TPACPI_Q_LNV3(__id1, __id2, __id3, __quirk) \
461 { .vendor = PCI_VENDOR_ID_LENOVO, \
462 .bios = TPID3(__id1, __id2, __id3), \
463 .ec = TPACPI_MATCH_ANY, \
464 .quirks = (__quirk) }
465
466 #define TPACPI_QEC_IBM(__id1, __id2, __quirk) \
467 { .vendor = PCI_VENDOR_ID_IBM, \
468 .bios = TPACPI_MATCH_ANY, \
469 .ec = TPID(__id1, __id2), \
470 .quirks = (__quirk) }
471
472 #define TPACPI_QEC_LNV(__id1, __id2, __quirk) \
473 { .vendor = PCI_VENDOR_ID_LENOVO, \
474 .bios = TPACPI_MATCH_ANY, \
475 .ec = TPID(__id1, __id2), \
476 .quirks = (__quirk) }
477
478 struct tpacpi_quirk {
479 unsigned int vendor;
480 u32 bios;
481 u32 ec;
482 unsigned long quirks;
483 };
484
485 /**
486 * tpacpi_check_quirks() - search BIOS/EC version on a list
487 * @qlist: array of &struct tpacpi_quirk
488 * @qlist_size: number of elements in @qlist
489 *
490 * Iterates over a quirks list until one is found that matches the
491 * ThinkPad's vendor, BIOS and EC model.
492 *
493 * Returns 0 if nothing matches, otherwise returns the quirks field of
494 * the matching &struct tpacpi_quirk entry.
495 *
496 * The match criteria is: vendor, ec and bios much match.
497 */
498 static unsigned long __init tpacpi_check_quirks(
499 const struct tpacpi_quirk *qlist,
500 unsigned int qlist_size)
501 {
502 while (qlist_size) {
503 if ((qlist->vendor == thinkpad_id.vendor ||
504 qlist->vendor == TPACPI_MATCH_ANY) &&
505 (qlist->bios == thinkpad_id.bios_model ||
506 qlist->bios == TPACPI_MATCH_ANY) &&
507 (qlist->ec == thinkpad_id.ec_model ||
508 qlist->ec == TPACPI_MATCH_ANY))
509 return qlist->quirks;
510
511 qlist_size--;
512 qlist++;
513 }
514 return 0;
515 }
516
517 static inline bool __pure __init tpacpi_is_lenovo(void)
518 {
519 return thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO;
520 }
521
522 static inline bool __pure __init tpacpi_is_ibm(void)
523 {
524 return thinkpad_id.vendor == PCI_VENDOR_ID_IBM;
525 }
526
527 /****************************************************************************
528 ****************************************************************************
529 *
530 * ACPI Helpers and device model
531 *
532 ****************************************************************************
533 ****************************************************************************/
534
535 /*************************************************************************
536 * ACPI basic handles
537 */
538
539 static acpi_handle root_handle;
540 static acpi_handle ec_handle;
541
542 #define TPACPI_HANDLE(object, parent, paths...) \
543 static acpi_handle object##_handle; \
544 static const acpi_handle * const object##_parent __initconst = \
545 &parent##_handle; \
546 static char *object##_paths[] __initdata = { paths }
547
548 TPACPI_HANDLE(ecrd, ec, "ECRD"); /* 570 */
549 TPACPI_HANDLE(ecwr, ec, "ECWR"); /* 570 */
550
551 TPACPI_HANDLE(cmos, root, "\\UCMS", /* R50, R50e, R50p, R51, */
552 /* T4x, X31, X40 */
553 "\\CMOS", /* A3x, G4x, R32, T23, T30, X22-24, X30 */
554 "\\CMS", /* R40, R40e */
555 ); /* all others */
556
557 TPACPI_HANDLE(hkey, ec, "\\_SB.HKEY", /* 600e/x, 770e, 770x */
558 "^HKEY", /* R30, R31 */
559 "HKEY", /* all others */
560 ); /* 570 */
561
562 /*************************************************************************
563 * ACPI helpers
564 */
565
566 static int acpi_evalf(acpi_handle handle,
567 int *res, char *method, char *fmt, ...)
568 {
569 char *fmt0 = fmt;
570 struct acpi_object_list params;
571 union acpi_object in_objs[TPACPI_MAX_ACPI_ARGS];
572 struct acpi_buffer result, *resultp;
573 union acpi_object out_obj;
574 acpi_status status;
575 va_list ap;
576 char res_type;
577 int success;
578 int quiet;
579
580 if (!*fmt) {
581 pr_err("acpi_evalf() called with empty format\n");
582 return 0;
583 }
584
585 if (*fmt == 'q') {
586 quiet = 1;
587 fmt++;
588 } else
589 quiet = 0;
590
591 res_type = *(fmt++);
592
593 params.count = 0;
594 params.pointer = &in_objs[0];
595
596 va_start(ap, fmt);
597 while (*fmt) {
598 char c = *(fmt++);
599 switch (c) {
600 case 'd': /* int */
601 in_objs[params.count].integer.value = va_arg(ap, int);
602 in_objs[params.count++].type = ACPI_TYPE_INTEGER;
603 break;
604 /* add more types as needed */
605 default:
606 pr_err("acpi_evalf() called with invalid format character '%c'\n",
607 c);
608 va_end(ap);
609 return 0;
610 }
611 }
612 va_end(ap);
613
614 if (res_type != 'v') {
615 result.length = sizeof(out_obj);
616 result.pointer = &out_obj;
617 resultp = &result;
618 } else
619 resultp = NULL;
620
621 status = acpi_evaluate_object(handle, method, &params, resultp);
622
623 switch (res_type) {
624 case 'd': /* int */
625 success = (status == AE_OK &&
626 out_obj.type == ACPI_TYPE_INTEGER);
627 if (success && res)
628 *res = out_obj.integer.value;
629 break;
630 case 'v': /* void */
631 success = status == AE_OK;
632 break;
633 /* add more types as needed */
634 default:
635 pr_err("acpi_evalf() called with invalid format character '%c'\n",
636 res_type);
637 return 0;
638 }
639
640 if (!success && !quiet)
641 pr_err("acpi_evalf(%s, %s, ...) failed: %s\n",
642 method, fmt0, acpi_format_exception(status));
643
644 return success;
645 }
646
647 static int acpi_ec_read(int i, u8 *p)
648 {
649 int v;
650
651 if (ecrd_handle) {
652 if (!acpi_evalf(ecrd_handle, &v, NULL, "dd", i))
653 return 0;
654 *p = v;
655 } else {
656 if (ec_read(i, p) < 0)
657 return 0;
658 }
659
660 return 1;
661 }
662
663 static int acpi_ec_write(int i, u8 v)
664 {
665 if (ecwr_handle) {
666 if (!acpi_evalf(ecwr_handle, NULL, NULL, "vdd", i, v))
667 return 0;
668 } else {
669 if (ec_write(i, v) < 0)
670 return 0;
671 }
672
673 return 1;
674 }
675
676 static int issue_thinkpad_cmos_command(int cmos_cmd)
677 {
678 if (!cmos_handle)
679 return -ENXIO;
680
681 if (!acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd))
682 return -EIO;
683
684 return 0;
685 }
686
687 /*************************************************************************
688 * ACPI device model
689 */
690
691 #define TPACPI_ACPIHANDLE_INIT(object) \
692 drv_acpi_handle_init(#object, &object##_handle, *object##_parent, \
693 object##_paths, ARRAY_SIZE(object##_paths))
694
695 static void __init drv_acpi_handle_init(const char *name,
696 acpi_handle *handle, const acpi_handle parent,
697 char **paths, const int num_paths)
698 {
699 int i;
700 acpi_status status;
701
702 vdbg_printk(TPACPI_DBG_INIT, "trying to locate ACPI handle for %s\n",
703 name);
704
705 for (i = 0; i < num_paths; i++) {
706 status = acpi_get_handle(parent, paths[i], handle);
707 if (ACPI_SUCCESS(status)) {
708 dbg_printk(TPACPI_DBG_INIT,
709 "Found ACPI handle %s for %s\n",
710 paths[i], name);
711 return;
712 }
713 }
714
715 vdbg_printk(TPACPI_DBG_INIT, "ACPI handle for %s not found\n",
716 name);
717 *handle = NULL;
718 }
719
720 static acpi_status __init tpacpi_acpi_handle_locate_callback(acpi_handle handle,
721 u32 level, void *context, void **return_value)
722 {
723 struct acpi_device *dev;
724 if (!strcmp(context, "video")) {
725 if (acpi_bus_get_device(handle, &dev))
726 return AE_OK;
727 if (strcmp(ACPI_VIDEO_HID, acpi_device_hid(dev)))
728 return AE_OK;
729 }
730
731 *(acpi_handle *)return_value = handle;
732
733 return AE_CTRL_TERMINATE;
734 }
735
736 static void __init tpacpi_acpi_handle_locate(const char *name,
737 const char *hid,
738 acpi_handle *handle)
739 {
740 acpi_status status;
741 acpi_handle device_found;
742
743 BUG_ON(!name || !handle);
744 vdbg_printk(TPACPI_DBG_INIT,
745 "trying to locate ACPI handle for %s, using HID %s\n",
746 name, hid ? hid : "NULL");
747
748 memset(&device_found, 0, sizeof(device_found));
749 status = acpi_get_devices(hid, tpacpi_acpi_handle_locate_callback,
750 (void *)name, &device_found);
751
752 *handle = NULL;
753
754 if (ACPI_SUCCESS(status)) {
755 *handle = device_found;
756 dbg_printk(TPACPI_DBG_INIT,
757 "Found ACPI handle for %s\n", name);
758 } else {
759 vdbg_printk(TPACPI_DBG_INIT,
760 "Could not locate an ACPI handle for %s: %s\n",
761 name, acpi_format_exception(status));
762 }
763 }
764
765 static void dispatch_acpi_notify(acpi_handle handle, u32 event, void *data)
766 {
767 struct ibm_struct *ibm = data;
768
769 if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
770 return;
771
772 if (!ibm || !ibm->acpi || !ibm->acpi->notify)
773 return;
774
775 ibm->acpi->notify(ibm, event);
776 }
777
778 static int __init setup_acpi_notify(struct ibm_struct *ibm)
779 {
780 acpi_status status;
781 int rc;
782
783 BUG_ON(!ibm->acpi);
784
785 if (!*ibm->acpi->handle)
786 return 0;
787
788 vdbg_printk(TPACPI_DBG_INIT,
789 "setting up ACPI notify for %s\n", ibm->name);
790
791 rc = acpi_bus_get_device(*ibm->acpi->handle, &ibm->acpi->device);
792 if (rc < 0) {
793 pr_err("acpi_bus_get_device(%s) failed: %d\n", ibm->name, rc);
794 return -ENODEV;
795 }
796
797 ibm->acpi->device->driver_data = ibm;
798 sprintf(acpi_device_class(ibm->acpi->device), "%s/%s",
799 TPACPI_ACPI_EVENT_PREFIX,
800 ibm->name);
801
802 status = acpi_install_notify_handler(*ibm->acpi->handle,
803 ibm->acpi->type, dispatch_acpi_notify, ibm);
804 if (ACPI_FAILURE(status)) {
805 if (status == AE_ALREADY_EXISTS) {
806 pr_notice("another device driver is already handling %s events\n",
807 ibm->name);
808 } else {
809 pr_err("acpi_install_notify_handler(%s) failed: %s\n",
810 ibm->name, acpi_format_exception(status));
811 }
812 return -ENODEV;
813 }
814 ibm->flags.acpi_notify_installed = 1;
815 return 0;
816 }
817
818 static int __init tpacpi_device_add(struct acpi_device *device)
819 {
820 return 0;
821 }
822
823 static int __init register_tpacpi_subdriver(struct ibm_struct *ibm)
824 {
825 int rc;
826
827 dbg_printk(TPACPI_DBG_INIT,
828 "registering %s as an ACPI driver\n", ibm->name);
829
830 BUG_ON(!ibm->acpi);
831
832 ibm->acpi->driver = kzalloc(sizeof(struct acpi_driver), GFP_KERNEL);
833 if (!ibm->acpi->driver) {
834 pr_err("failed to allocate memory for ibm->acpi->driver\n");
835 return -ENOMEM;
836 }
837
838 sprintf(ibm->acpi->driver->name, "%s_%s", TPACPI_NAME, ibm->name);
839 ibm->acpi->driver->ids = ibm->acpi->hid;
840
841 ibm->acpi->driver->ops.add = &tpacpi_device_add;
842
843 rc = acpi_bus_register_driver(ibm->acpi->driver);
844 if (rc < 0) {
845 pr_err("acpi_bus_register_driver(%s) failed: %d\n",
846 ibm->name, rc);
847 kfree(ibm->acpi->driver);
848 ibm->acpi->driver = NULL;
849 } else if (!rc)
850 ibm->flags.acpi_driver_registered = 1;
851
852 return rc;
853 }
854
855
856 /****************************************************************************
857 ****************************************************************************
858 *
859 * Procfs Helpers
860 *
861 ****************************************************************************
862 ****************************************************************************/
863
864 static int dispatch_proc_show(struct seq_file *m, void *v)
865 {
866 struct ibm_struct *ibm = m->private;
867
868 if (!ibm || !ibm->read)
869 return -EINVAL;
870 return ibm->read(m);
871 }
872
873 static int dispatch_proc_open(struct inode *inode, struct file *file)
874 {
875 return single_open(file, dispatch_proc_show, PDE_DATA(inode));
876 }
877
878 static ssize_t dispatch_proc_write(struct file *file,
879 const char __user *userbuf,
880 size_t count, loff_t *pos)
881 {
882 struct ibm_struct *ibm = PDE_DATA(file_inode(file));
883 char *kernbuf;
884 int ret;
885
886 if (!ibm || !ibm->write)
887 return -EINVAL;
888 if (count > PAGE_SIZE - 1)
889 return -EINVAL;
890
891 kernbuf = kmalloc(count + 1, GFP_KERNEL);
892 if (!kernbuf)
893 return -ENOMEM;
894
895 if (copy_from_user(kernbuf, userbuf, count)) {
896 kfree(kernbuf);
897 return -EFAULT;
898 }
899
900 kernbuf[count] = 0;
901 ret = ibm->write(kernbuf);
902 if (ret == 0)
903 ret = count;
904
905 kfree(kernbuf);
906
907 return ret;
908 }
909
910 static const struct proc_ops dispatch_proc_ops = {
911 .proc_open = dispatch_proc_open,
912 .proc_read = seq_read,
913 .proc_lseek = seq_lseek,
914 .proc_release = single_release,
915 .proc_write = dispatch_proc_write,
916 };
917
918 /****************************************************************************
919 ****************************************************************************
920 *
921 * Device model: input, hwmon and platform
922 *
923 ****************************************************************************
924 ****************************************************************************/
925
926 static struct platform_device *tpacpi_pdev;
927 static struct platform_device *tpacpi_sensors_pdev;
928 static struct device *tpacpi_hwmon;
929 static struct input_dev *tpacpi_inputdev;
930 static struct mutex tpacpi_inputdev_send_mutex;
931 static LIST_HEAD(tpacpi_all_drivers);
932
933 #ifdef CONFIG_PM_SLEEP
934 static int tpacpi_suspend_handler(struct device *dev)
935 {
936 struct ibm_struct *ibm, *itmp;
937
938 list_for_each_entry_safe(ibm, itmp,
939 &tpacpi_all_drivers,
940 all_drivers) {
941 if (ibm->suspend)
942 (ibm->suspend)();
943 }
944
945 return 0;
946 }
947
948 static int tpacpi_resume_handler(struct device *dev)
949 {
950 struct ibm_struct *ibm, *itmp;
951
952 list_for_each_entry_safe(ibm, itmp,
953 &tpacpi_all_drivers,
954 all_drivers) {
955 if (ibm->resume)
956 (ibm->resume)();
957 }
958
959 return 0;
960 }
961 #endif
962
963 static SIMPLE_DEV_PM_OPS(tpacpi_pm,
964 tpacpi_suspend_handler, tpacpi_resume_handler);
965
966 static void tpacpi_shutdown_handler(struct platform_device *pdev)
967 {
968 struct ibm_struct *ibm, *itmp;
969
970 list_for_each_entry_safe(ibm, itmp,
971 &tpacpi_all_drivers,
972 all_drivers) {
973 if (ibm->shutdown)
974 (ibm->shutdown)();
975 }
976 }
977
978 static struct platform_driver tpacpi_pdriver = {
979 .driver = {
980 .name = TPACPI_DRVR_NAME,
981 .pm = &tpacpi_pm,
982 },
983 .shutdown = tpacpi_shutdown_handler,
984 };
985
986 static struct platform_driver tpacpi_hwmon_pdriver = {
987 .driver = {
988 .name = TPACPI_HWMON_DRVR_NAME,
989 },
990 };
991
992 /*************************************************************************
993 * sysfs support helpers
994 */
995
996 struct attribute_set {
997 unsigned int members, max_members;
998 struct attribute_group group;
999 };
1000
1001 struct attribute_set_obj {
1002 struct attribute_set s;
1003 struct attribute *a;
1004 } __attribute__((packed));
1005
1006 static struct attribute_set *create_attr_set(unsigned int max_members,
1007 const char *name)
1008 {
1009 struct attribute_set_obj *sobj;
1010
1011 if (max_members == 0)
1012 return NULL;
1013
1014 /* Allocates space for implicit NULL at the end too */
1015 sobj = kzalloc(sizeof(struct attribute_set_obj) +
1016 max_members * sizeof(struct attribute *),
1017 GFP_KERNEL);
1018 if (!sobj)
1019 return NULL;
1020 sobj->s.max_members = max_members;
1021 sobj->s.group.attrs = &sobj->a;
1022 sobj->s.group.name = name;
1023
1024 return &sobj->s;
1025 }
1026
1027 #define destroy_attr_set(_set) \
1028 kfree(_set)
1029
1030 /* not multi-threaded safe, use it in a single thread per set */
1031 static int add_to_attr_set(struct attribute_set *s, struct attribute *attr)
1032 {
1033 if (!s || !attr)
1034 return -EINVAL;
1035
1036 if (s->members >= s->max_members)
1037 return -ENOMEM;
1038
1039 s->group.attrs[s->members] = attr;
1040 s->members++;
1041
1042 return 0;
1043 }
1044
1045 static int add_many_to_attr_set(struct attribute_set *s,
1046 struct attribute **attr,
1047 unsigned int count)
1048 {
1049 int i, res;
1050
1051 for (i = 0; i < count; i++) {
1052 res = add_to_attr_set(s, attr[i]);
1053 if (res)
1054 return res;
1055 }
1056
1057 return 0;
1058 }
1059
1060 static void delete_attr_set(struct attribute_set *s, struct kobject *kobj)
1061 {
1062 sysfs_remove_group(kobj, &s->group);
1063 destroy_attr_set(s);
1064 }
1065
1066 #define register_attr_set_with_sysfs(_attr_set, _kobj) \
1067 sysfs_create_group(_kobj, &_attr_set->group)
1068
1069 static int parse_strtoul(const char *buf,
1070 unsigned long max, unsigned long *value)
1071 {
1072 char *endp;
1073
1074 *value = simple_strtoul(skip_spaces(buf), &endp, 0);
1075 endp = skip_spaces(endp);
1076 if (*endp || *value > max)
1077 return -EINVAL;
1078
1079 return 0;
1080 }
1081
1082 static void tpacpi_disable_brightness_delay(void)
1083 {
1084 if (acpi_evalf(hkey_handle, NULL, "PWMS", "qvd", 0))
1085 pr_notice("ACPI backlight control delay disabled\n");
1086 }
1087
1088 static void printk_deprecated_attribute(const char * const what,
1089 const char * const details)
1090 {
1091 tpacpi_log_usertask("deprecated sysfs attribute");
1092 pr_warn("WARNING: sysfs attribute %s is deprecated and will be removed. %s\n",
1093 what, details);
1094 }
1095
1096 /*************************************************************************
1097 * rfkill and radio control support helpers
1098 */
1099
1100 /*
1101 * ThinkPad-ACPI firmware handling model:
1102 *
1103 * WLSW (master wireless switch) is event-driven, and is common to all
1104 * firmware-controlled radios. It cannot be controlled, just monitored,
1105 * as expected. It overrides all radio state in firmware
1106 *
1107 * The kernel, a masked-off hotkey, and WLSW can change the radio state
1108 * (TODO: verify how WLSW interacts with the returned radio state).
1109 *
1110 * The only time there are shadow radio state changes, is when
1111 * masked-off hotkeys are used.
1112 */
1113
1114 /*
1115 * Internal driver API for radio state:
1116 *
1117 * int: < 0 = error, otherwise enum tpacpi_rfkill_state
1118 * bool: true means radio blocked (off)
1119 */
1120 enum tpacpi_rfkill_state {
1121 TPACPI_RFK_RADIO_OFF = 0,
1122 TPACPI_RFK_RADIO_ON
1123 };
1124
1125 /* rfkill switches */
1126 enum tpacpi_rfk_id {
1127 TPACPI_RFK_BLUETOOTH_SW_ID = 0,
1128 TPACPI_RFK_WWAN_SW_ID,
1129 TPACPI_RFK_UWB_SW_ID,
1130 TPACPI_RFK_SW_MAX
1131 };
1132
1133 static const char *tpacpi_rfkill_names[] = {
1134 [TPACPI_RFK_BLUETOOTH_SW_ID] = "bluetooth",
1135 [TPACPI_RFK_WWAN_SW_ID] = "wwan",
1136 [TPACPI_RFK_UWB_SW_ID] = "uwb",
1137 [TPACPI_RFK_SW_MAX] = NULL
1138 };
1139
1140 /* ThinkPad-ACPI rfkill subdriver */
1141 struct tpacpi_rfk {
1142 struct rfkill *rfkill;
1143 enum tpacpi_rfk_id id;
1144 const struct tpacpi_rfk_ops *ops;
1145 };
1146
1147 struct tpacpi_rfk_ops {
1148 /* firmware interface */
1149 int (*get_status)(void);
1150 int (*set_status)(const enum tpacpi_rfkill_state);
1151 };
1152
1153 static struct tpacpi_rfk *tpacpi_rfkill_switches[TPACPI_RFK_SW_MAX];
1154
1155 /* Query FW and update rfkill sw state for a given rfkill switch */
1156 static int tpacpi_rfk_update_swstate(const struct tpacpi_rfk *tp_rfk)
1157 {
1158 int status;
1159
1160 if (!tp_rfk)
1161 return -ENODEV;
1162
1163 status = (tp_rfk->ops->get_status)();
1164 if (status < 0)
1165 return status;
1166
1167 rfkill_set_sw_state(tp_rfk->rfkill,
1168 (status == TPACPI_RFK_RADIO_OFF));
1169
1170 return status;
1171 }
1172
1173 /* Query FW and update rfkill sw state for all rfkill switches */
1174 static void tpacpi_rfk_update_swstate_all(void)
1175 {
1176 unsigned int i;
1177
1178 for (i = 0; i < TPACPI_RFK_SW_MAX; i++)
1179 tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[i]);
1180 }
1181
1182 /*
1183 * Sync the HW-blocking state of all rfkill switches,
1184 * do notice it causes the rfkill core to schedule uevents
1185 */
1186 static void tpacpi_rfk_update_hwblock_state(bool blocked)
1187 {
1188 unsigned int i;
1189 struct tpacpi_rfk *tp_rfk;
1190
1191 for (i = 0; i < TPACPI_RFK_SW_MAX; i++) {
1192 tp_rfk = tpacpi_rfkill_switches[i];
1193 if (tp_rfk) {
1194 if (rfkill_set_hw_state(tp_rfk->rfkill,
1195 blocked)) {
1196 /* ignore -- we track sw block */
1197 }
1198 }
1199 }
1200 }
1201
1202 /* Call to get the WLSW state from the firmware */
1203 static int hotkey_get_wlsw(void);
1204
1205 /* Call to query WLSW state and update all rfkill switches */
1206 static bool tpacpi_rfk_check_hwblock_state(void)
1207 {
1208 int res = hotkey_get_wlsw();
1209 int hw_blocked;
1210
1211 /* When unknown or unsupported, we have to assume it is unblocked */
1212 if (res < 0)
1213 return false;
1214
1215 hw_blocked = (res == TPACPI_RFK_RADIO_OFF);
1216 tpacpi_rfk_update_hwblock_state(hw_blocked);
1217
1218 return hw_blocked;
1219 }
1220
1221 static int tpacpi_rfk_hook_set_block(void *data, bool blocked)
1222 {
1223 struct tpacpi_rfk *tp_rfk = data;
1224 int res;
1225
1226 dbg_printk(TPACPI_DBG_RFKILL,
1227 "request to change radio state to %s\n",
1228 blocked ? "blocked" : "unblocked");
1229
1230 /* try to set radio state */
1231 res = (tp_rfk->ops->set_status)(blocked ?
1232 TPACPI_RFK_RADIO_OFF : TPACPI_RFK_RADIO_ON);
1233
1234 /* and update the rfkill core with whatever the FW really did */
1235 tpacpi_rfk_update_swstate(tp_rfk);
1236
1237 return (res < 0) ? res : 0;
1238 }
1239
1240 static const struct rfkill_ops tpacpi_rfk_rfkill_ops = {
1241 .set_block = tpacpi_rfk_hook_set_block,
1242 };
1243
1244 static int __init tpacpi_new_rfkill(const enum tpacpi_rfk_id id,
1245 const struct tpacpi_rfk_ops *tp_rfkops,
1246 const enum rfkill_type rfktype,
1247 const char *name,
1248 const bool set_default)
1249 {
1250 struct tpacpi_rfk *atp_rfk;
1251 int res;
1252 bool sw_state = false;
1253 bool hw_state;
1254 int sw_status;
1255
1256 BUG_ON(id >= TPACPI_RFK_SW_MAX || tpacpi_rfkill_switches[id]);
1257
1258 atp_rfk = kzalloc(sizeof(struct tpacpi_rfk), GFP_KERNEL);
1259 if (atp_rfk)
1260 atp_rfk->rfkill = rfkill_alloc(name,
1261 &tpacpi_pdev->dev,
1262 rfktype,
1263 &tpacpi_rfk_rfkill_ops,
1264 atp_rfk);
1265 if (!atp_rfk || !atp_rfk->rfkill) {
1266 pr_err("failed to allocate memory for rfkill class\n");
1267 kfree(atp_rfk);
1268 return -ENOMEM;
1269 }
1270
1271 atp_rfk->id = id;
1272 atp_rfk->ops = tp_rfkops;
1273
1274 sw_status = (tp_rfkops->get_status)();
1275 if (sw_status < 0) {
1276 pr_err("failed to read initial state for %s, error %d\n",
1277 name, sw_status);
1278 } else {
1279 sw_state = (sw_status == TPACPI_RFK_RADIO_OFF);
1280 if (set_default) {
1281 /* try to keep the initial state, since we ask the
1282 * firmware to preserve it across S5 in NVRAM */
1283 rfkill_init_sw_state(atp_rfk->rfkill, sw_state);
1284 }
1285 }
1286 hw_state = tpacpi_rfk_check_hwblock_state();
1287 rfkill_set_hw_state(atp_rfk->rfkill, hw_state);
1288
1289 res = rfkill_register(atp_rfk->rfkill);
1290 if (res < 0) {
1291 pr_err("failed to register %s rfkill switch: %d\n", name, res);
1292 rfkill_destroy(atp_rfk->rfkill);
1293 kfree(atp_rfk);
1294 return res;
1295 }
1296
1297 tpacpi_rfkill_switches[id] = atp_rfk;
1298
1299 pr_info("rfkill switch %s: radio is %sblocked\n",
1300 name, (sw_state || hw_state) ? "" : "un");
1301 return 0;
1302 }
1303
1304 static void tpacpi_destroy_rfkill(const enum tpacpi_rfk_id id)
1305 {
1306 struct tpacpi_rfk *tp_rfk;
1307
1308 BUG_ON(id >= TPACPI_RFK_SW_MAX);
1309
1310 tp_rfk = tpacpi_rfkill_switches[id];
1311 if (tp_rfk) {
1312 rfkill_unregister(tp_rfk->rfkill);
1313 rfkill_destroy(tp_rfk->rfkill);
1314 tpacpi_rfkill_switches[id] = NULL;
1315 kfree(tp_rfk);
1316 }
1317 }
1318
1319 static void printk_deprecated_rfkill_attribute(const char * const what)
1320 {
1321 printk_deprecated_attribute(what,
1322 "Please switch to generic rfkill before year 2010");
1323 }
1324
1325 /* sysfs <radio> enable ------------------------------------------------ */
1326 static ssize_t tpacpi_rfk_sysfs_enable_show(const enum tpacpi_rfk_id id,
1327 struct device_attribute *attr,
1328 char *buf)
1329 {
1330 int status;
1331
1332 printk_deprecated_rfkill_attribute(attr->attr.name);
1333
1334 /* This is in the ABI... */
1335 if (tpacpi_rfk_check_hwblock_state()) {
1336 status = TPACPI_RFK_RADIO_OFF;
1337 } else {
1338 status = tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]);
1339 if (status < 0)
1340 return status;
1341 }
1342
1343 return snprintf(buf, PAGE_SIZE, "%d\n",
1344 (status == TPACPI_RFK_RADIO_ON) ? 1 : 0);
1345 }
1346
1347 static ssize_t tpacpi_rfk_sysfs_enable_store(const enum tpacpi_rfk_id id,
1348 struct device_attribute *attr,
1349 const char *buf, size_t count)
1350 {
1351 unsigned long t;
1352 int res;
1353
1354 printk_deprecated_rfkill_attribute(attr->attr.name);
1355
1356 if (parse_strtoul(buf, 1, &t))
1357 return -EINVAL;
1358
1359 tpacpi_disclose_usertask(attr->attr.name, "set to %ld\n", t);
1360
1361 /* This is in the ABI... */
1362 if (tpacpi_rfk_check_hwblock_state() && !!t)
1363 return -EPERM;
1364
1365 res = tpacpi_rfkill_switches[id]->ops->set_status((!!t) ?
1366 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF);
1367 tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]);
1368
1369 return (res < 0) ? res : count;
1370 }
1371
1372 /* procfs -------------------------------------------------------------- */
1373 static int tpacpi_rfk_procfs_read(const enum tpacpi_rfk_id id, struct seq_file *m)
1374 {
1375 if (id >= TPACPI_RFK_SW_MAX)
1376 seq_printf(m, "status:\t\tnot supported\n");
1377 else {
1378 int status;
1379
1380 /* This is in the ABI... */
1381 if (tpacpi_rfk_check_hwblock_state()) {
1382 status = TPACPI_RFK_RADIO_OFF;
1383 } else {
1384 status = tpacpi_rfk_update_swstate(
1385 tpacpi_rfkill_switches[id]);
1386 if (status < 0)
1387 return status;
1388 }
1389
1390 seq_printf(m, "status:\t\t%s\n",
1391 (status == TPACPI_RFK_RADIO_ON) ?
1392 "enabled" : "disabled");
1393 seq_printf(m, "commands:\tenable, disable\n");
1394 }
1395
1396 return 0;
1397 }
1398
1399 static int tpacpi_rfk_procfs_write(const enum tpacpi_rfk_id id, char *buf)
1400 {
1401 char *cmd;
1402 int status = -1;
1403 int res = 0;
1404
1405 if (id >= TPACPI_RFK_SW_MAX)
1406 return -ENODEV;
1407
1408 while ((cmd = strsep(&buf, ","))) {
1409 if (strlencmp(cmd, "enable") == 0)
1410 status = TPACPI_RFK_RADIO_ON;
1411 else if (strlencmp(cmd, "disable") == 0)
1412 status = TPACPI_RFK_RADIO_OFF;
1413 else
1414 return -EINVAL;
1415 }
1416
1417 if (status != -1) {
1418 tpacpi_disclose_usertask("procfs", "attempt to %s %s\n",
1419 (status == TPACPI_RFK_RADIO_ON) ?
1420 "enable" : "disable",
1421 tpacpi_rfkill_names[id]);
1422 res = (tpacpi_rfkill_switches[id]->ops->set_status)(status);
1423 tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]);
1424 }
1425
1426 return res;
1427 }
1428
1429 /*************************************************************************
1430 * thinkpad-acpi driver attributes
1431 */
1432
1433 /* interface_version --------------------------------------------------- */
1434 static ssize_t interface_version_show(struct device_driver *drv, char *buf)
1435 {
1436 return snprintf(buf, PAGE_SIZE, "0x%08x\n", TPACPI_SYSFS_VERSION);
1437 }
1438 static DRIVER_ATTR_RO(interface_version);
1439
1440 /* debug_level --------------------------------------------------------- */
1441 static ssize_t debug_level_show(struct device_driver *drv, char *buf)
1442 {
1443 return snprintf(buf, PAGE_SIZE, "0x%04x\n", dbg_level);
1444 }
1445
1446 static ssize_t debug_level_store(struct device_driver *drv, const char *buf,
1447 size_t count)
1448 {
1449 unsigned long t;
1450
1451 if (parse_strtoul(buf, 0xffff, &t))
1452 return -EINVAL;
1453
1454 dbg_level = t;
1455
1456 return count;
1457 }
1458 static DRIVER_ATTR_RW(debug_level);
1459
1460 /* version ------------------------------------------------------------- */
1461 static ssize_t version_show(struct device_driver *drv, char *buf)
1462 {
1463 return snprintf(buf, PAGE_SIZE, "%s v%s\n",
1464 TPACPI_DESC, TPACPI_VERSION);
1465 }
1466 static DRIVER_ATTR_RO(version);
1467
1468 /* --------------------------------------------------------------------- */
1469
1470 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
1471
1472 /* wlsw_emulstate ------------------------------------------------------ */
1473 static ssize_t wlsw_emulstate_show(struct device_driver *drv, char *buf)
1474 {
1475 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_wlsw_emulstate);
1476 }
1477
1478 static ssize_t wlsw_emulstate_store(struct device_driver *drv, const char *buf,
1479 size_t count)
1480 {
1481 unsigned long t;
1482
1483 if (parse_strtoul(buf, 1, &t))
1484 return -EINVAL;
1485
1486 if (tpacpi_wlsw_emulstate != !!t) {
1487 tpacpi_wlsw_emulstate = !!t;
1488 tpacpi_rfk_update_hwblock_state(!t); /* negative logic */
1489 }
1490
1491 return count;
1492 }
1493 static DRIVER_ATTR_RW(wlsw_emulstate);
1494
1495 /* bluetooth_emulstate ------------------------------------------------- */
1496 static ssize_t bluetooth_emulstate_show(struct device_driver *drv, char *buf)
1497 {
1498 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_bluetooth_emulstate);
1499 }
1500
1501 static ssize_t bluetooth_emulstate_store(struct device_driver *drv,
1502 const char *buf, size_t count)
1503 {
1504 unsigned long t;
1505
1506 if (parse_strtoul(buf, 1, &t))
1507 return -EINVAL;
1508
1509 tpacpi_bluetooth_emulstate = !!t;
1510
1511 return count;
1512 }
1513 static DRIVER_ATTR_RW(bluetooth_emulstate);
1514
1515 /* wwan_emulstate ------------------------------------------------- */
1516 static ssize_t wwan_emulstate_show(struct device_driver *drv, char *buf)
1517 {
1518 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_wwan_emulstate);
1519 }
1520
1521 static ssize_t wwan_emulstate_store(struct device_driver *drv, const char *buf,
1522 size_t count)
1523 {
1524 unsigned long t;
1525
1526 if (parse_strtoul(buf, 1, &t))
1527 return -EINVAL;
1528
1529 tpacpi_wwan_emulstate = !!t;
1530
1531 return count;
1532 }
1533 static DRIVER_ATTR_RW(wwan_emulstate);
1534
1535 /* uwb_emulstate ------------------------------------------------- */
1536 static ssize_t uwb_emulstate_show(struct device_driver *drv, char *buf)
1537 {
1538 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_uwb_emulstate);
1539 }
1540
1541 static ssize_t uwb_emulstate_store(struct device_driver *drv, const char *buf,
1542 size_t count)
1543 {
1544 unsigned long t;
1545
1546 if (parse_strtoul(buf, 1, &t))
1547 return -EINVAL;
1548
1549 tpacpi_uwb_emulstate = !!t;
1550
1551 return count;
1552 }
1553 static DRIVER_ATTR_RW(uwb_emulstate);
1554 #endif
1555
1556 /* --------------------------------------------------------------------- */
1557
1558 static struct driver_attribute *tpacpi_driver_attributes[] = {
1559 &driver_attr_debug_level, &driver_attr_version,
1560 &driver_attr_interface_version,
1561 };
1562
1563 static int __init tpacpi_create_driver_attributes(struct device_driver *drv)
1564 {
1565 int i, res;
1566
1567 i = 0;
1568 res = 0;
1569 while (!res && i < ARRAY_SIZE(tpacpi_driver_attributes)) {
1570 res = driver_create_file(drv, tpacpi_driver_attributes[i]);
1571 i++;
1572 }
1573
1574 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
1575 if (!res && dbg_wlswemul)
1576 res = driver_create_file(drv, &driver_attr_wlsw_emulstate);
1577 if (!res && dbg_bluetoothemul)
1578 res = driver_create_file(drv, &driver_attr_bluetooth_emulstate);
1579 if (!res && dbg_wwanemul)
1580 res = driver_create_file(drv, &driver_attr_wwan_emulstate);
1581 if (!res && dbg_uwbemul)
1582 res = driver_create_file(drv, &driver_attr_uwb_emulstate);
1583 #endif
1584
1585 return res;
1586 }
1587
1588 static void tpacpi_remove_driver_attributes(struct device_driver *drv)
1589 {
1590 int i;
1591
1592 for (i = 0; i < ARRAY_SIZE(tpacpi_driver_attributes); i++)
1593 driver_remove_file(drv, tpacpi_driver_attributes[i]);
1594
1595 #ifdef THINKPAD_ACPI_DEBUGFACILITIES
1596 driver_remove_file(drv, &driver_attr_wlsw_emulstate);
1597 driver_remove_file(drv, &driver_attr_bluetooth_emulstate);
1598 driver_remove_file(drv, &driver_attr_wwan_emulstate);
1599 driver_remove_file(drv, &driver_attr_uwb_emulstate);
1600 #endif
1601 }
1602
1603 /*************************************************************************
1604 * Firmware Data
1605 */
1606
1607 /*
1608 * Table of recommended minimum BIOS versions
1609 *
1610 * Reasons for listing:
1611 * 1. Stable BIOS, listed because the unknown amount of
1612 * bugs and bad ACPI behaviour on older versions
1613 *
1614 * 2. BIOS or EC fw with known bugs that trigger on Linux
1615 *
1616 * 3. BIOS with known reduced functionality in older versions
1617 *
1618 * We recommend the latest BIOS and EC version.
1619 * We only support the latest BIOS and EC fw version as a rule.
1620 *
1621 * Sources: IBM ThinkPad Public Web Documents (update changelogs),
1622 * Information from users in ThinkWiki
1623 *
1624 * WARNING: we use this table also to detect that the machine is
1625 * a ThinkPad in some cases, so don't remove entries lightly.
1626 */
1627
1628 #define TPV_Q(__v, __id1, __id2, __bv1, __bv2) \
1629 { .vendor = (__v), \
1630 .bios = TPID(__id1, __id2), \
1631 .ec = TPACPI_MATCH_ANY, \
1632 .quirks = TPACPI_MATCH_ANY_VERSION << 16 \
1633 | TPVER(__bv1, __bv2) }
1634
1635 #define TPV_Q_X(__v, __bid1, __bid2, __bv1, __bv2, \
1636 __eid, __ev1, __ev2) \
1637 { .vendor = (__v), \
1638 .bios = TPID(__bid1, __bid2), \
1639 .ec = __eid, \
1640 .quirks = TPVER(__ev1, __ev2) << 16 \
1641 | TPVER(__bv1, __bv2) }
1642
1643 #define TPV_QI0(__id1, __id2, __bv1, __bv2) \
1644 TPV_Q(PCI_VENDOR_ID_IBM, __id1, __id2, __bv1, __bv2)
1645
1646 /* Outdated IBM BIOSes often lack the EC id string */
1647 #define TPV_QI1(__id1, __id2, __bv1, __bv2, __ev1, __ev2) \
1648 TPV_Q_X(PCI_VENDOR_ID_IBM, __id1, __id2, \
1649 __bv1, __bv2, TPID(__id1, __id2), \
1650 __ev1, __ev2), \
1651 TPV_Q_X(PCI_VENDOR_ID_IBM, __id1, __id2, \
1652 __bv1, __bv2, TPACPI_MATCH_UNKNOWN, \
1653 __ev1, __ev2)
1654
1655 /* Outdated IBM BIOSes often lack the EC id string */
1656 #define TPV_QI2(__bid1, __bid2, __bv1, __bv2, \
1657 __eid1, __eid2, __ev1, __ev2) \
1658 TPV_Q_X(PCI_VENDOR_ID_IBM, __bid1, __bid2, \
1659 __bv1, __bv2, TPID(__eid1, __eid2), \
1660 __ev1, __ev2), \
1661 TPV_Q_X(PCI_VENDOR_ID_IBM, __bid1, __bid2, \
1662 __bv1, __bv2, TPACPI_MATCH_UNKNOWN, \
1663 __ev1, __ev2)
1664
1665 #define TPV_QL0(__id1, __id2, __bv1, __bv2) \
1666 TPV_Q(PCI_VENDOR_ID_LENOVO, __id1, __id2, __bv1, __bv2)
1667
1668 #define TPV_QL1(__id1, __id2, __bv1, __bv2, __ev1, __ev2) \
1669 TPV_Q_X(PCI_VENDOR_ID_LENOVO, __id1, __id2, \
1670 __bv1, __bv2, TPID(__id1, __id2), \
1671 __ev1, __ev2)
1672
1673 #define TPV_QL2(__bid1, __bid2, __bv1, __bv2, \
1674 __eid1, __eid2, __ev1, __ev2) \
1675 TPV_Q_X(PCI_VENDOR_ID_LENOVO, __bid1, __bid2, \
1676 __bv1, __bv2, TPID(__eid1, __eid2), \
1677 __ev1, __ev2)
1678
1679 static const struct tpacpi_quirk tpacpi_bios_version_qtable[] __initconst = {
1680 /* Numeric models ------------------ */
1681 /* FW MODEL BIOS VERS */
1682 TPV_QI0('I', 'M', '6', '5'), /* 570 */
1683 TPV_QI0('I', 'U', '2', '6'), /* 570E */
1684 TPV_QI0('I', 'B', '5', '4'), /* 600 */
1685 TPV_QI0('I', 'H', '4', '7'), /* 600E */
1686 TPV_QI0('I', 'N', '3', '6'), /* 600E */
1687 TPV_QI0('I', 'T', '5', '5'), /* 600X */
1688 TPV_QI0('I', 'D', '4', '8'), /* 770, 770E, 770ED */
1689 TPV_QI0('I', 'I', '4', '2'), /* 770X */
1690 TPV_QI0('I', 'O', '2', '3'), /* 770Z */
1691
1692 /* A-series ------------------------- */
1693 /* FW MODEL BIOS VERS EC VERS */
1694 TPV_QI0('I', 'W', '5', '9'), /* A20m */
1695 TPV_QI0('I', 'V', '6', '9'), /* A20p */
1696 TPV_QI0('1', '0', '2', '6'), /* A21e, A22e */
1697 TPV_QI0('K', 'U', '3', '6'), /* A21e */
1698 TPV_QI0('K', 'X', '3', '6'), /* A21m, A22m */
1699 TPV_QI0('K', 'Y', '3', '8'), /* A21p, A22p */
1700 TPV_QI0('1', 'B', '1', '7'), /* A22e */
1701 TPV_QI0('1', '3', '2', '0'), /* A22m */
1702 TPV_QI0('1', 'E', '7', '3'), /* A30/p (0) */
1703 TPV_QI1('1', 'G', '4', '1', '1', '7'), /* A31/p (0) */
1704 TPV_QI1('1', 'N', '1', '6', '0', '7'), /* A31/p (0) */
1705
1706 /* G-series ------------------------- */
1707 /* FW MODEL BIOS VERS */
1708 TPV_QI0('1', 'T', 'A', '6'), /* G40 */
1709 TPV_QI0('1', 'X', '5', '7'), /* G41 */
1710
1711 /* R-series, T-series --------------- */
1712 /* FW MODEL BIOS VERS EC VERS */
1713 TPV_QI0('1', 'C', 'F', '0'), /* R30 */
1714 TPV_QI0('1', 'F', 'F', '1'), /* R31 */
1715 TPV_QI0('1', 'M', '9', '7'), /* R32 */
1716 TPV_QI0('1', 'O', '6', '1'), /* R40 */
1717 TPV_QI0('1', 'P', '6', '5'), /* R40 */
1718 TPV_QI0('1', 'S', '7', '0'), /* R40e */
1719 TPV_QI1('1', 'R', 'D', 'R', '7', '1'), /* R50/p, R51,
1720 T40/p, T41/p, T42/p (1) */
1721 TPV_QI1('1', 'V', '7', '1', '2', '8'), /* R50e, R51 (1) */
1722 TPV_QI1('7', '8', '7', '1', '0', '6'), /* R51e (1) */
1723 TPV_QI1('7', '6', '6', '9', '1', '6'), /* R52 (1) */
1724 TPV_QI1('7', '0', '6', '9', '2', '8'), /* R52, T43 (1) */
1725
1726 TPV_QI0('I', 'Y', '6', '1'), /* T20 */
1727 TPV_QI0('K', 'Z', '3', '4'), /* T21 */
1728 TPV_QI0('1', '6', '3', '2'), /* T22 */
1729 TPV_QI1('1', 'A', '6', '4', '2', '3'), /* T23 (0) */
1730 TPV_QI1('1', 'I', '7', '1', '2', '0'), /* T30 (0) */
1731 TPV_QI1('1', 'Y', '6', '5', '2', '9'), /* T43/p (1) */
1732
1733 TPV_QL1('7', '9', 'E', '3', '5', '0'), /* T60/p */
1734 TPV_QL1('7', 'C', 'D', '2', '2', '2'), /* R60, R60i */
1735 TPV_QL1('7', 'E', 'D', '0', '1', '5'), /* R60e, R60i */
1736
1737 /* BIOS FW BIOS VERS EC FW EC VERS */
1738 TPV_QI2('1', 'W', '9', '0', '1', 'V', '2', '8'), /* R50e (1) */
1739 TPV_QL2('7', 'I', '3', '4', '7', '9', '5', '0'), /* T60/p wide */
1740
1741 /* X-series ------------------------- */
1742 /* FW MODEL BIOS VERS EC VERS */
1743 TPV_QI0('I', 'Z', '9', 'D'), /* X20, X21 */
1744 TPV_QI0('1', 'D', '7', '0'), /* X22, X23, X24 */
1745 TPV_QI1('1', 'K', '4', '8', '1', '8'), /* X30 (0) */
1746 TPV_QI1('1', 'Q', '9', '7', '2', '3'), /* X31, X32 (0) */
1747 TPV_QI1('1', 'U', 'D', '3', 'B', '2'), /* X40 (0) */
1748 TPV_QI1('7', '4', '6', '4', '2', '7'), /* X41 (0) */
1749 TPV_QI1('7', '5', '6', '0', '2', '0'), /* X41t (0) */
1750
1751 TPV_QL1('7', 'B', 'D', '7', '4', '0'), /* X60/s */
1752 TPV_QL1('7', 'J', '3', '0', '1', '3'), /* X60t */
1753
1754 /* (0) - older versions lack DMI EC fw string and functionality */
1755 /* (1) - older versions known to lack functionality */
1756 };
1757
1758 #undef TPV_QL1
1759 #undef TPV_QL0
1760 #undef TPV_QI2
1761 #undef TPV_QI1
1762 #undef TPV_QI0
1763 #undef TPV_Q_X
1764 #undef TPV_Q
1765
1766 static void __init tpacpi_check_outdated_fw(void)
1767 {
1768 unsigned long fwvers;
1769 u16 ec_version, bios_version;
1770
1771 fwvers = tpacpi_check_quirks(tpacpi_bios_version_qtable,
1772 ARRAY_SIZE(tpacpi_bios_version_qtable));
1773
1774 if (!fwvers)
1775 return;
1776
1777 bios_version = fwvers & 0xffffU;
1778 ec_version = (fwvers >> 16) & 0xffffU;
1779
1780 /* note that unknown versions are set to 0x0000 and we use that */
1781 if ((bios_version > thinkpad_id.bios_release) ||
1782 (ec_version > thinkpad_id.ec_release &&
1783 ec_version != TPACPI_MATCH_ANY_VERSION)) {
1784 /*
1785 * The changelogs would let us track down the exact
1786 * reason, but it is just too much of a pain to track
1787 * it. We only list BIOSes that are either really
1788 * broken, or really stable to begin with, so it is
1789 * best if the user upgrades the firmware anyway.
1790 */
1791 pr_warn("WARNING: Outdated ThinkPad BIOS/EC firmware\n");
1792 pr_warn("WARNING: This firmware may be missing critical bug fixes and/or important features\n");
1793 }
1794 }
1795
1796 static bool __init tpacpi_is_fw_known(void)
1797 {
1798 return tpacpi_check_quirks(tpacpi_bios_version_qtable,
1799 ARRAY_SIZE(tpacpi_bios_version_qtable)) != 0;
1800 }
1801
1802 /****************************************************************************
1803 ****************************************************************************
1804 *
1805 * Subdrivers
1806 *
1807 ****************************************************************************
1808 ****************************************************************************/
1809
1810 /*************************************************************************
1811 * thinkpad-acpi metadata subdriver
1812 */
1813
1814 static int thinkpad_acpi_driver_read(struct seq_file *m)
1815 {
1816 seq_printf(m, "driver:\t\t%s\n", TPACPI_DESC);
1817 seq_printf(m, "version:\t%s\n", TPACPI_VERSION);
1818 return 0;
1819 }
1820
1821 static struct ibm_struct thinkpad_acpi_driver_data = {
1822 .name = "driver",
1823 .read = thinkpad_acpi_driver_read,
1824 };
1825
1826 /*************************************************************************
1827 * Hotkey subdriver
1828 */
1829
1830 /*
1831 * ThinkPad firmware event model
1832 *
1833 * The ThinkPad firmware has two main event interfaces: normal ACPI
1834 * notifications (which follow the ACPI standard), and a private event
1835 * interface.
1836 *
1837 * The private event interface also issues events for the hotkeys. As
1838 * the driver gained features, the event handling code ended up being
1839 * built around the hotkey subdriver. This will need to be refactored
1840 * to a more formal event API eventually.
1841 *
1842 * Some "hotkeys" are actually supposed to be used as event reports,
1843 * such as "brightness has changed", "volume has changed", depending on
1844 * the ThinkPad model and how the firmware is operating.
1845 *
1846 * Unlike other classes, hotkey-class events have mask/unmask control on
1847 * non-ancient firmware. However, how it behaves changes a lot with the
1848 * firmware model and version.
1849 */
1850
1851 enum { /* hot key scan codes (derived from ACPI DSDT) */
1852 TP_ACPI_HOTKEYSCAN_FNF1 = 0,
1853 TP_ACPI_HOTKEYSCAN_FNF2,
1854 TP_ACPI_HOTKEYSCAN_FNF3,
1855 TP_ACPI_HOTKEYSCAN_FNF4,
1856 TP_ACPI_HOTKEYSCAN_FNF5,
1857 TP_ACPI_HOTKEYSCAN_FNF6,
1858 TP_ACPI_HOTKEYSCAN_FNF7,
1859 TP_ACPI_HOTKEYSCAN_FNF8,
1860 TP_ACPI_HOTKEYSCAN_FNF9,
1861 TP_ACPI_HOTKEYSCAN_FNF10,
1862 TP_ACPI_HOTKEYSCAN_FNF11,
1863 TP_ACPI_HOTKEYSCAN_FNF12,
1864 TP_ACPI_HOTKEYSCAN_FNBACKSPACE,
1865 TP_ACPI_HOTKEYSCAN_FNINSERT,
1866 TP_ACPI_HOTKEYSCAN_FNDELETE,
1867 TP_ACPI_HOTKEYSCAN_FNHOME,
1868 TP_ACPI_HOTKEYSCAN_FNEND,
1869 TP_ACPI_HOTKEYSCAN_FNPAGEUP,
1870 TP_ACPI_HOTKEYSCAN_FNPAGEDOWN,
1871 TP_ACPI_HOTKEYSCAN_FNSPACE,
1872 TP_ACPI_HOTKEYSCAN_VOLUMEUP,
1873 TP_ACPI_HOTKEYSCAN_VOLUMEDOWN,
1874 TP_ACPI_HOTKEYSCAN_MUTE,
1875 TP_ACPI_HOTKEYSCAN_THINKPAD,
1876 TP_ACPI_HOTKEYSCAN_UNK1,
1877 TP_ACPI_HOTKEYSCAN_UNK2,
1878 TP_ACPI_HOTKEYSCAN_UNK3,
1879 TP_ACPI_HOTKEYSCAN_UNK4,
1880 TP_ACPI_HOTKEYSCAN_UNK5,
1881 TP_ACPI_HOTKEYSCAN_UNK6,
1882 TP_ACPI_HOTKEYSCAN_UNK7,
1883 TP_ACPI_HOTKEYSCAN_UNK8,
1884
1885 /* Adaptive keyboard keycodes */
1886 TP_ACPI_HOTKEYSCAN_ADAPTIVE_START,
1887 TP_ACPI_HOTKEYSCAN_MUTE2 = TP_ACPI_HOTKEYSCAN_ADAPTIVE_START,
1888 TP_ACPI_HOTKEYSCAN_BRIGHTNESS_ZERO,
1889 TP_ACPI_HOTKEYSCAN_CLIPPING_TOOL,
1890 TP_ACPI_HOTKEYSCAN_CLOUD,
1891 TP_ACPI_HOTKEYSCAN_UNK9,
1892 TP_ACPI_HOTKEYSCAN_VOICE,
1893 TP_ACPI_HOTKEYSCAN_UNK10,
1894 TP_ACPI_HOTKEYSCAN_GESTURES,
1895 TP_ACPI_HOTKEYSCAN_UNK11,
1896 TP_ACPI_HOTKEYSCAN_UNK12,
1897 TP_ACPI_HOTKEYSCAN_UNK13,
1898 TP_ACPI_HOTKEYSCAN_CONFIG,
1899 TP_ACPI_HOTKEYSCAN_NEW_TAB,
1900 TP_ACPI_HOTKEYSCAN_RELOAD,
1901 TP_ACPI_HOTKEYSCAN_BACK,
1902 TP_ACPI_HOTKEYSCAN_MIC_DOWN,
1903 TP_ACPI_HOTKEYSCAN_MIC_UP,
1904 TP_ACPI_HOTKEYSCAN_MIC_CANCELLATION,
1905 TP_ACPI_HOTKEYSCAN_CAMERA_MODE,
1906 TP_ACPI_HOTKEYSCAN_ROTATE_DISPLAY,
1907
1908 /* Lenovo extended keymap, starting at 0x1300 */
1909 TP_ACPI_HOTKEYSCAN_EXTENDED_START,
1910 /* first new observed key (star, favorites) is 0x1311 */
1911 TP_ACPI_HOTKEYSCAN_STAR = 69,
1912 TP_ACPI_HOTKEYSCAN_CLIPPING_TOOL2,
1913 TP_ACPI_HOTKEYSCAN_CALCULATOR,
1914 TP_ACPI_HOTKEYSCAN_BLUETOOTH,
1915 TP_ACPI_HOTKEYSCAN_KEYBOARD,
1916 TP_ACPI_HOTKEYSCAN_FN_RIGHT_SHIFT, /* Used by "Lenovo Quick Clean" */
1917 TP_ACPI_HOTKEYSCAN_NOTIFICATION_CENTER,
1918 TP_ACPI_HOTKEYSCAN_PICKUP_PHONE,
1919 TP_ACPI_HOTKEYSCAN_HANGUP_PHONE,
1920
1921 /* Hotkey keymap size */
1922 TPACPI_HOTKEY_MAP_LEN
1923 };
1924
1925 enum { /* Keys/events available through NVRAM polling */
1926 TPACPI_HKEY_NVRAM_KNOWN_MASK = 0x00fb88c0U,
1927 TPACPI_HKEY_NVRAM_GOOD_MASK = 0x00fb8000U,
1928 };
1929
1930 enum { /* Positions of some of the keys in hotkey masks */
1931 TP_ACPI_HKEY_DISPSWTCH_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF7,
1932 TP_ACPI_HKEY_DISPXPAND_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF8,
1933 TP_ACPI_HKEY_HIBERNATE_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF12,
1934 TP_ACPI_HKEY_BRGHTUP_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNHOME,
1935 TP_ACPI_HKEY_BRGHTDWN_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNEND,
1936 TP_ACPI_HKEY_KBD_LIGHT_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNPAGEUP,
1937 TP_ACPI_HKEY_ZOOM_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNSPACE,
1938 TP_ACPI_HKEY_VOLUP_MASK = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEUP,
1939 TP_ACPI_HKEY_VOLDWN_MASK = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEDOWN,
1940 TP_ACPI_HKEY_MUTE_MASK = 1 << TP_ACPI_HOTKEYSCAN_MUTE,
1941 TP_ACPI_HKEY_THINKPAD_MASK = 1 << TP_ACPI_HOTKEYSCAN_THINKPAD,
1942 };
1943
1944 enum { /* NVRAM to ACPI HKEY group map */
1945 TP_NVRAM_HKEY_GROUP_HK2 = TP_ACPI_HKEY_THINKPAD_MASK |
1946 TP_ACPI_HKEY_ZOOM_MASK |
1947 TP_ACPI_HKEY_DISPSWTCH_MASK |
1948 TP_ACPI_HKEY_HIBERNATE_MASK,
1949 TP_NVRAM_HKEY_GROUP_BRIGHTNESS = TP_ACPI_HKEY_BRGHTUP_MASK |
1950 TP_ACPI_HKEY_BRGHTDWN_MASK,
1951 TP_NVRAM_HKEY_GROUP_VOLUME = TP_ACPI_HKEY_VOLUP_MASK |
1952 TP_ACPI_HKEY_VOLDWN_MASK |
1953 TP_ACPI_HKEY_MUTE_MASK,
1954 };
1955
1956 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1957 struct tp_nvram_state {
1958 u16 thinkpad_toggle:1;
1959 u16 zoom_toggle:1;
1960 u16 display_toggle:1;
1961 u16 thinklight_toggle:1;
1962 u16 hibernate_toggle:1;
1963 u16 displayexp_toggle:1;
1964 u16 display_state:1;
1965 u16 brightness_toggle:1;
1966 u16 volume_toggle:1;
1967 u16 mute:1;
1968
1969 u8 brightness_level;
1970 u8 volume_level;
1971 };
1972
1973 /* kthread for the hotkey poller */
1974 static struct task_struct *tpacpi_hotkey_task;
1975
1976 /*
1977 * Acquire mutex to write poller control variables as an
1978 * atomic block.
1979 *
1980 * Increment hotkey_config_change when changing them if you
1981 * want the kthread to forget old state.
1982 *
1983 * See HOTKEY_CONFIG_CRITICAL_START/HOTKEY_CONFIG_CRITICAL_END
1984 */
1985 static struct mutex hotkey_thread_data_mutex;
1986 static unsigned int hotkey_config_change;
1987
1988 /*
1989 * hotkey poller control variables
1990 *
1991 * Must be atomic or readers will also need to acquire mutex
1992 *
1993 * HOTKEY_CONFIG_CRITICAL_START/HOTKEY_CONFIG_CRITICAL_END
1994 * should be used only when the changes need to be taken as
1995 * a block, OR when one needs to force the kthread to forget
1996 * old state.
1997 */
1998 static u32 hotkey_source_mask; /* bit mask 0=ACPI,1=NVRAM */
1999 static unsigned int hotkey_poll_freq = 10; /* Hz */
2000
2001 #define HOTKEY_CONFIG_CRITICAL_START \
2002 do { \
2003 mutex_lock(&hotkey_thread_data_mutex); \
2004 hotkey_config_change++; \
2005 } while (0);
2006 #define HOTKEY_CONFIG_CRITICAL_END \
2007 mutex_unlock(&hotkey_thread_data_mutex);
2008
2009 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2010
2011 #define hotkey_source_mask 0U
2012 #define HOTKEY_CONFIG_CRITICAL_START
2013 #define HOTKEY_CONFIG_CRITICAL_END
2014
2015 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2016
2017 static struct mutex hotkey_mutex;
2018
2019 static enum { /* Reasons for waking up */
2020 TP_ACPI_WAKEUP_NONE = 0, /* None or unknown */
2021 TP_ACPI_WAKEUP_BAYEJ, /* Bay ejection request */
2022 TP_ACPI_WAKEUP_UNDOCK, /* Undock request */
2023 } hotkey_wakeup_reason;
2024
2025 static int hotkey_autosleep_ack;
2026
2027 static u32 hotkey_orig_mask; /* events the BIOS had enabled */
2028 static u32 hotkey_all_mask; /* all events supported in fw */
2029 static u32 hotkey_adaptive_all_mask; /* all adaptive events supported in fw */
2030 static u32 hotkey_reserved_mask; /* events better left disabled */
2031 static u32 hotkey_driver_mask; /* events needed by the driver */
2032 static u32 hotkey_user_mask; /* events visible to userspace */
2033 static u32 hotkey_acpi_mask; /* events enabled in firmware */
2034
2035 static u16 *hotkey_keycode_map;
2036
2037 static struct attribute_set *hotkey_dev_attributes;
2038
2039 static void tpacpi_driver_event(const unsigned int hkey_event);
2040 static void hotkey_driver_event(const unsigned int scancode);
2041 static void hotkey_poll_setup(const bool may_warn);
2042
2043 /* HKEY.MHKG() return bits */
2044 #define TP_HOTKEY_TABLET_MASK (1 << 3)
2045 enum {
2046 TP_ACPI_MULTI_MODE_INVALID = 0,
2047 TP_ACPI_MULTI_MODE_UNKNOWN = 1 << 0,
2048 TP_ACPI_MULTI_MODE_LAPTOP = 1 << 1,
2049 TP_ACPI_MULTI_MODE_TABLET = 1 << 2,
2050 TP_ACPI_MULTI_MODE_FLAT = 1 << 3,
2051 TP_ACPI_MULTI_MODE_STAND = 1 << 4,
2052 TP_ACPI_MULTI_MODE_TENT = 1 << 5,
2053 TP_ACPI_MULTI_MODE_STAND_TENT = 1 << 6,
2054 };
2055
2056 enum {
2057 /* The following modes are considered tablet mode for the purpose of
2058 * reporting the status to userspace. i.e. in all these modes it makes
2059 * sense to disable the laptop input devices such as touchpad and
2060 * keyboard.
2061 */
2062 TP_ACPI_MULTI_MODE_TABLET_LIKE = TP_ACPI_MULTI_MODE_TABLET |
2063 TP_ACPI_MULTI_MODE_STAND |
2064 TP_ACPI_MULTI_MODE_TENT |
2065 TP_ACPI_MULTI_MODE_STAND_TENT,
2066 };
2067
2068 static int hotkey_get_wlsw(void)
2069 {
2070 int status;
2071
2072 if (!tp_features.hotkey_wlsw)
2073 return -ENODEV;
2074
2075 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
2076 if (dbg_wlswemul)
2077 return (tpacpi_wlsw_emulstate) ?
2078 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
2079 #endif
2080
2081 if (!acpi_evalf(hkey_handle, &status, "WLSW", "d"))
2082 return -EIO;
2083
2084 return (status) ? TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
2085 }
2086
2087 static int hotkey_gmms_get_tablet_mode(int s, int *has_tablet_mode)
2088 {
2089 int type = (s >> 16) & 0xffff;
2090 int value = s & 0xffff;
2091 int mode = TP_ACPI_MULTI_MODE_INVALID;
2092 int valid_modes = 0;
2093
2094 if (has_tablet_mode)
2095 *has_tablet_mode = 0;
2096
2097 switch (type) {
2098 case 1:
2099 valid_modes = TP_ACPI_MULTI_MODE_LAPTOP |
2100 TP_ACPI_MULTI_MODE_TABLET |
2101 TP_ACPI_MULTI_MODE_STAND_TENT;
2102 break;
2103 case 2:
2104 valid_modes = TP_ACPI_MULTI_MODE_LAPTOP |
2105 TP_ACPI_MULTI_MODE_FLAT |
2106 TP_ACPI_MULTI_MODE_TABLET |
2107 TP_ACPI_MULTI_MODE_STAND |
2108 TP_ACPI_MULTI_MODE_TENT;
2109 break;
2110 case 3:
2111 valid_modes = TP_ACPI_MULTI_MODE_LAPTOP |
2112 TP_ACPI_MULTI_MODE_FLAT;
2113 break;
2114 case 4:
2115 case 5:
2116 /* In mode 4, FLAT is not specified as a valid mode. However,
2117 * it can be seen at least on the X1 Yoga 2nd Generation.
2118 */
2119 valid_modes = TP_ACPI_MULTI_MODE_LAPTOP |
2120 TP_ACPI_MULTI_MODE_FLAT |
2121 TP_ACPI_MULTI_MODE_TABLET |
2122 TP_ACPI_MULTI_MODE_STAND |
2123 TP_ACPI_MULTI_MODE_TENT;
2124 break;
2125 default:
2126 pr_err("Unknown multi mode status type %d with value 0x%04X, please report this to %s\n",
2127 type, value, TPACPI_MAIL);
2128 return 0;
2129 }
2130
2131 if (has_tablet_mode && (valid_modes & TP_ACPI_MULTI_MODE_TABLET_LIKE))
2132 *has_tablet_mode = 1;
2133
2134 switch (value) {
2135 case 1:
2136 mode = TP_ACPI_MULTI_MODE_LAPTOP;
2137 break;
2138 case 2:
2139 mode = TP_ACPI_MULTI_MODE_FLAT;
2140 break;
2141 case 3:
2142 mode = TP_ACPI_MULTI_MODE_TABLET;
2143 break;
2144 case 4:
2145 if (type == 1)
2146 mode = TP_ACPI_MULTI_MODE_STAND_TENT;
2147 else
2148 mode = TP_ACPI_MULTI_MODE_STAND;
2149 break;
2150 case 5:
2151 mode = TP_ACPI_MULTI_MODE_TENT;
2152 break;
2153 default:
2154 if (type == 5 && value == 0xffff) {
2155 pr_warn("Multi mode status is undetected, assuming laptop\n");
2156 return 0;
2157 }
2158 }
2159
2160 if (!(mode & valid_modes)) {
2161 pr_err("Unknown/reserved multi mode value 0x%04X for type %d, please report this to %s\n",
2162 value, type, TPACPI_MAIL);
2163 return 0;
2164 }
2165
2166 return !!(mode & TP_ACPI_MULTI_MODE_TABLET_LIKE);
2167 }
2168
2169 static int hotkey_get_tablet_mode(int *status)
2170 {
2171 int s;
2172
2173 switch (tp_features.hotkey_tablet) {
2174 case TP_HOTKEY_TABLET_USES_MHKG:
2175 if (!acpi_evalf(hkey_handle, &s, "MHKG", "d"))
2176 return -EIO;
2177
2178 *status = ((s & TP_HOTKEY_TABLET_MASK) != 0);
2179 break;
2180 case TP_HOTKEY_TABLET_USES_GMMS:
2181 if (!acpi_evalf(hkey_handle, &s, "GMMS", "dd", 0))
2182 return -EIO;
2183
2184 *status = hotkey_gmms_get_tablet_mode(s, NULL);
2185 break;
2186 default:
2187 break;
2188 }
2189
2190 return 0;
2191 }
2192
2193 /*
2194 * Reads current event mask from firmware, and updates
2195 * hotkey_acpi_mask accordingly. Also resets any bits
2196 * from hotkey_user_mask that are unavailable to be
2197 * delivered (shadow requirement of the userspace ABI).
2198 *
2199 * Call with hotkey_mutex held
2200 */
2201 static int hotkey_mask_get(void)
2202 {
2203 if (tp_features.hotkey_mask) {
2204 u32 m = 0;
2205
2206 if (!acpi_evalf(hkey_handle, &m, "DHKN", "d"))
2207 return -EIO;
2208
2209 hotkey_acpi_mask = m;
2210 } else {
2211 /* no mask support doesn't mean no event support... */
2212 hotkey_acpi_mask = hotkey_all_mask;
2213 }
2214
2215 /* sync userspace-visible mask */
2216 hotkey_user_mask &= (hotkey_acpi_mask | hotkey_source_mask);
2217
2218 return 0;
2219 }
2220
2221 static void hotkey_mask_warn_incomplete_mask(void)
2222 {
2223 /* log only what the user can fix... */
2224 const u32 wantedmask = hotkey_driver_mask &
2225 ~(hotkey_acpi_mask | hotkey_source_mask) &
2226 (hotkey_all_mask | TPACPI_HKEY_NVRAM_KNOWN_MASK);
2227
2228 if (wantedmask)
2229 pr_notice("required events 0x%08x not enabled!\n", wantedmask);
2230 }
2231
2232 /*
2233 * Set the firmware mask when supported
2234 *
2235 * Also calls hotkey_mask_get to update hotkey_acpi_mask.
2236 *
2237 * NOTE: does not set bits in hotkey_user_mask, but may reset them.
2238 *
2239 * Call with hotkey_mutex held
2240 */
2241 static int hotkey_mask_set(u32 mask)
2242 {
2243 int i;
2244 int rc = 0;
2245
2246 const u32 fwmask = mask & ~hotkey_source_mask;
2247
2248 if (tp_features.hotkey_mask) {
2249 for (i = 0; i < 32; i++) {
2250 if (!acpi_evalf(hkey_handle,
2251 NULL, "MHKM", "vdd", i + 1,
2252 !!(mask & (1 << i)))) {
2253 rc = -EIO;
2254 break;
2255 }
2256 }
2257 }
2258
2259 /*
2260 * We *must* make an inconditional call to hotkey_mask_get to
2261 * refresh hotkey_acpi_mask and update hotkey_user_mask
2262 *
2263 * Take the opportunity to also log when we cannot _enable_
2264 * a given event.
2265 */
2266 if (!hotkey_mask_get() && !rc && (fwmask & ~hotkey_acpi_mask)) {
2267 pr_notice("asked for hotkey mask 0x%08x, but firmware forced it to 0x%08x\n",
2268 fwmask, hotkey_acpi_mask);
2269 }
2270
2271 if (tpacpi_lifecycle != TPACPI_LIFE_EXITING)
2272 hotkey_mask_warn_incomplete_mask();
2273
2274 return rc;
2275 }
2276
2277 /*
2278 * Sets hotkey_user_mask and tries to set the firmware mask
2279 *
2280 * Call with hotkey_mutex held
2281 */
2282 static int hotkey_user_mask_set(const u32 mask)
2283 {
2284 int rc;
2285
2286 /* Give people a chance to notice they are doing something that
2287 * is bound to go boom on their users sooner or later */
2288 if (!tp_warned.hotkey_mask_ff &&
2289 (mask == 0xffff || mask == 0xffffff ||
2290 mask == 0xffffffff)) {
2291 tp_warned.hotkey_mask_ff = 1;
2292 pr_notice("setting the hotkey mask to 0x%08x is likely not the best way to go about it\n",
2293 mask);
2294 pr_notice("please consider using the driver defaults, and refer to up-to-date thinkpad-acpi documentation\n");
2295 }
2296
2297 /* Try to enable what the user asked for, plus whatever we need.
2298 * this syncs everything but won't enable bits in hotkey_user_mask */
2299 rc = hotkey_mask_set((mask | hotkey_driver_mask) & ~hotkey_source_mask);
2300
2301 /* Enable the available bits in hotkey_user_mask */
2302 hotkey_user_mask = mask & (hotkey_acpi_mask | hotkey_source_mask);
2303
2304 return rc;
2305 }
2306
2307 /*
2308 * Sets the driver hotkey mask.
2309 *
2310 * Can be called even if the hotkey subdriver is inactive
2311 */
2312 static int tpacpi_hotkey_driver_mask_set(const u32 mask)
2313 {
2314 int rc;
2315
2316 /* Do the right thing if hotkey_init has not been called yet */
2317 if (!tp_features.hotkey) {
2318 hotkey_driver_mask = mask;
2319 return 0;
2320 }
2321
2322 mutex_lock(&hotkey_mutex);
2323
2324 HOTKEY_CONFIG_CRITICAL_START
2325 hotkey_driver_mask = mask;
2326 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2327 hotkey_source_mask |= (mask & ~hotkey_all_mask);
2328 #endif
2329 HOTKEY_CONFIG_CRITICAL_END
2330
2331 rc = hotkey_mask_set((hotkey_acpi_mask | hotkey_driver_mask) &
2332 ~hotkey_source_mask);
2333 hotkey_poll_setup(true);
2334
2335 mutex_unlock(&hotkey_mutex);
2336
2337 return rc;
2338 }
2339
2340 static int hotkey_status_get(int *status)
2341 {
2342 if (!acpi_evalf(hkey_handle, status, "DHKC", "d"))
2343 return -EIO;
2344
2345 return 0;
2346 }
2347
2348 static int hotkey_status_set(bool enable)
2349 {
2350 if (!acpi_evalf(hkey_handle, NULL, "MHKC", "vd", enable ? 1 : 0))
2351 return -EIO;
2352
2353 return 0;
2354 }
2355
2356 static void tpacpi_input_send_tabletsw(void)
2357 {
2358 int state;
2359
2360 if (tp_features.hotkey_tablet &&
2361 !hotkey_get_tablet_mode(&state)) {
2362 mutex_lock(&tpacpi_inputdev_send_mutex);
2363
2364 input_report_switch(tpacpi_inputdev,
2365 SW_TABLET_MODE, !!state);
2366 input_sync(tpacpi_inputdev);
2367
2368 mutex_unlock(&tpacpi_inputdev_send_mutex);
2369 }
2370 }
2371
2372 /* Do NOT call without validating scancode first */
2373 static void tpacpi_input_send_key(const unsigned int scancode)
2374 {
2375 const unsigned int keycode = hotkey_keycode_map[scancode];
2376
2377 if (keycode != KEY_RESERVED) {
2378 mutex_lock(&tpacpi_inputdev_send_mutex);
2379
2380 input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN, scancode);
2381 input_report_key(tpacpi_inputdev, keycode, 1);
2382 input_sync(tpacpi_inputdev);
2383
2384 input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN, scancode);
2385 input_report_key(tpacpi_inputdev, keycode, 0);
2386 input_sync(tpacpi_inputdev);
2387
2388 mutex_unlock(&tpacpi_inputdev_send_mutex);
2389 }
2390 }
2391
2392 /* Do NOT call without validating scancode first */
2393 static void tpacpi_input_send_key_masked(const unsigned int scancode)
2394 {
2395 hotkey_driver_event(scancode);
2396 if (hotkey_user_mask & (1 << scancode))
2397 tpacpi_input_send_key(scancode);
2398 }
2399
2400 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2401 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver;
2402
2403 /* Do NOT call without validating scancode first */
2404 static void tpacpi_hotkey_send_key(unsigned int scancode)
2405 {
2406 tpacpi_input_send_key_masked(scancode);
2407 }
2408
2409 static void hotkey_read_nvram(struct tp_nvram_state *n, const u32 m)
2410 {
2411 u8 d;
2412
2413 if (m & TP_NVRAM_HKEY_GROUP_HK2) {
2414 d = nvram_read_byte(TP_NVRAM_ADDR_HK2);
2415 n->thinkpad_toggle = !!(d & TP_NVRAM_MASK_HKT_THINKPAD);
2416 n->zoom_toggle = !!(d & TP_NVRAM_MASK_HKT_ZOOM);
2417 n->display_toggle = !!(d & TP_NVRAM_MASK_HKT_DISPLAY);
2418 n->hibernate_toggle = !!(d & TP_NVRAM_MASK_HKT_HIBERNATE);
2419 }
2420 if (m & TP_ACPI_HKEY_KBD_LIGHT_MASK) {
2421 d = nvram_read_byte(TP_NVRAM_ADDR_THINKLIGHT);
2422 n->thinklight_toggle = !!(d & TP_NVRAM_MASK_THINKLIGHT);
2423 }
2424 if (m & TP_ACPI_HKEY_DISPXPAND_MASK) {
2425 d = nvram_read_byte(TP_NVRAM_ADDR_VIDEO);
2426 n->displayexp_toggle =
2427 !!(d & TP_NVRAM_MASK_HKT_DISPEXPND);
2428 }
2429 if (m & TP_NVRAM_HKEY_GROUP_BRIGHTNESS) {
2430 d = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS);
2431 n->brightness_level = (d & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
2432 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
2433 n->brightness_toggle =
2434 !!(d & TP_NVRAM_MASK_HKT_BRIGHTNESS);
2435 }
2436 if (m & TP_NVRAM_HKEY_GROUP_VOLUME) {
2437 d = nvram_read_byte(TP_NVRAM_ADDR_MIXER);
2438 n->volume_level = (d & TP_NVRAM_MASK_LEVEL_VOLUME)
2439 >> TP_NVRAM_POS_LEVEL_VOLUME;
2440 n->mute = !!(d & TP_NVRAM_MASK_MUTE);
2441 n->volume_toggle = !!(d & TP_NVRAM_MASK_HKT_VOLUME);
2442 }
2443 }
2444
2445 #define TPACPI_COMPARE_KEY(__scancode, __member) \
2446 do { \
2447 if ((event_mask & (1 << __scancode)) && \
2448 oldn->__member != newn->__member) \
2449 tpacpi_hotkey_send_key(__scancode); \
2450 } while (0)
2451
2452 #define TPACPI_MAY_SEND_KEY(__scancode) \
2453 do { \
2454 if (event_mask & (1 << __scancode)) \
2455 tpacpi_hotkey_send_key(__scancode); \
2456 } while (0)
2457
2458 static void issue_volchange(const unsigned int oldvol,
2459 const unsigned int newvol,
2460 const u32 event_mask)
2461 {
2462 unsigned int i = oldvol;
2463
2464 while (i > newvol) {
2465 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
2466 i--;
2467 }
2468 while (i < newvol) {
2469 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
2470 i++;
2471 }
2472 }
2473
2474 static void issue_brightnesschange(const unsigned int oldbrt,
2475 const unsigned int newbrt,
2476 const u32 event_mask)
2477 {
2478 unsigned int i = oldbrt;
2479
2480 while (i > newbrt) {
2481 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
2482 i--;
2483 }
2484 while (i < newbrt) {
2485 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
2486 i++;
2487 }
2488 }
2489
2490 static void hotkey_compare_and_issue_event(struct tp_nvram_state *oldn,
2491 struct tp_nvram_state *newn,
2492 const u32 event_mask)
2493 {
2494
2495 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_THINKPAD, thinkpad_toggle);
2496 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNSPACE, zoom_toggle);
2497 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF7, display_toggle);
2498 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF12, hibernate_toggle);
2499
2500 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNPAGEUP, thinklight_toggle);
2501
2502 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF8, displayexp_toggle);
2503
2504 /*
2505 * Handle volume
2506 *
2507 * This code is supposed to duplicate the IBM firmware behaviour:
2508 * - Pressing MUTE issues mute hotkey message, even when already mute
2509 * - Pressing Volume up/down issues volume up/down hotkey messages,
2510 * even when already at maximum or minimum volume
2511 * - The act of unmuting issues volume up/down notification,
2512 * depending which key was used to unmute
2513 *
2514 * We are constrained to what the NVRAM can tell us, which is not much
2515 * and certainly not enough if more than one volume hotkey was pressed
2516 * since the last poll cycle.
2517 *
2518 * Just to make our life interesting, some newer Lenovo ThinkPads have
2519 * bugs in the BIOS and may fail to update volume_toggle properly.
2520 */
2521 if (newn->mute) {
2522 /* muted */
2523 if (!oldn->mute ||
2524 oldn->volume_toggle != newn->volume_toggle ||
2525 oldn->volume_level != newn->volume_level) {
2526 /* recently muted, or repeated mute keypress, or
2527 * multiple presses ending in mute */
2528 issue_volchange(oldn->volume_level, newn->volume_level,
2529 event_mask);
2530 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE);
2531 }
2532 } else {
2533 /* unmute */
2534 if (oldn->mute) {
2535 /* recently unmuted, issue 'unmute' keypress */
2536 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
2537 }
2538 if (oldn->volume_level != newn->volume_level) {
2539 issue_volchange(oldn->volume_level, newn->volume_level,
2540 event_mask);
2541 } else if (oldn->volume_toggle != newn->volume_toggle) {
2542 /* repeated vol up/down keypress at end of scale ? */
2543 if (newn->volume_level == 0)
2544 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
2545 else if (newn->volume_level >= TP_NVRAM_LEVEL_VOLUME_MAX)
2546 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
2547 }
2548 }
2549
2550 /* handle brightness */
2551 if (oldn->brightness_level != newn->brightness_level) {
2552 issue_brightnesschange(oldn->brightness_level,
2553 newn->brightness_level, event_mask);
2554 } else if (oldn->brightness_toggle != newn->brightness_toggle) {
2555 /* repeated key presses that didn't change state */
2556 if (newn->brightness_level == 0)
2557 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
2558 else if (newn->brightness_level >= bright_maxlvl
2559 && !tp_features.bright_unkfw)
2560 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
2561 }
2562
2563 #undef TPACPI_COMPARE_KEY
2564 #undef TPACPI_MAY_SEND_KEY
2565 }
2566
2567 /*
2568 * Polling driver
2569 *
2570 * We track all events in hotkey_source_mask all the time, since
2571 * most of them are edge-based. We only issue those requested by
2572 * hotkey_user_mask or hotkey_driver_mask, though.
2573 */
2574 static int hotkey_kthread(void *data)
2575 {
2576 struct tp_nvram_state s[2] = { 0 };
2577 u32 poll_mask, event_mask;
2578 unsigned int si, so;
2579 unsigned long t;
2580 unsigned int change_detector;
2581 unsigned int poll_freq;
2582 bool was_frozen;
2583
2584 if (tpacpi_lifecycle == TPACPI_LIFE_EXITING)
2585 goto exit;
2586
2587 set_freezable();
2588
2589 so = 0;
2590 si = 1;
2591 t = 0;
2592
2593 /* Initial state for compares */
2594 mutex_lock(&hotkey_thread_data_mutex);
2595 change_detector = hotkey_config_change;
2596 poll_mask = hotkey_source_mask;
2597 event_mask = hotkey_source_mask &
2598 (hotkey_driver_mask | hotkey_user_mask);
2599 poll_freq = hotkey_poll_freq;
2600 mutex_unlock(&hotkey_thread_data_mutex);
2601 hotkey_read_nvram(&s[so], poll_mask);
2602
2603 while (!kthread_should_stop()) {
2604 if (t == 0) {
2605 if (likely(poll_freq))
2606 t = 1000/poll_freq;
2607 else
2608 t = 100; /* should never happen... */
2609 }
2610 t = msleep_interruptible(t);
2611 if (unlikely(kthread_freezable_should_stop(&was_frozen)))
2612 break;
2613
2614 if (t > 0 && !was_frozen)
2615 continue;
2616
2617 mutex_lock(&hotkey_thread_data_mutex);
2618 if (was_frozen || hotkey_config_change != change_detector) {
2619 /* forget old state on thaw or config change */
2620 si = so;
2621 t = 0;
2622 change_detector = hotkey_config_change;
2623 }
2624 poll_mask = hotkey_source_mask;
2625 event_mask = hotkey_source_mask &
2626 (hotkey_driver_mask | hotkey_user_mask);
2627 poll_freq = hotkey_poll_freq;
2628 mutex_unlock(&hotkey_thread_data_mutex);
2629
2630 if (likely(poll_mask)) {
2631 hotkey_read_nvram(&s[si], poll_mask);
2632 if (likely(si != so)) {
2633 hotkey_compare_and_issue_event(&s[so], &s[si],
2634 event_mask);
2635 }
2636 }
2637
2638 so = si;
2639 si ^= 1;
2640 }
2641
2642 exit:
2643 return 0;
2644 }
2645
2646 /* call with hotkey_mutex held */
2647 static void hotkey_poll_stop_sync(void)
2648 {
2649 if (tpacpi_hotkey_task) {
2650 kthread_stop(tpacpi_hotkey_task);
2651 tpacpi_hotkey_task = NULL;
2652 }
2653 }
2654
2655 /* call with hotkey_mutex held */
2656 static void hotkey_poll_setup(const bool may_warn)
2657 {
2658 const u32 poll_driver_mask = hotkey_driver_mask & hotkey_source_mask;
2659 const u32 poll_user_mask = hotkey_user_mask & hotkey_source_mask;
2660
2661 if (hotkey_poll_freq > 0 &&
2662 (poll_driver_mask ||
2663 (poll_user_mask && tpacpi_inputdev->users > 0))) {
2664 if (!tpacpi_hotkey_task) {
2665 tpacpi_hotkey_task = kthread_run(hotkey_kthread,
2666 NULL, TPACPI_NVRAM_KTHREAD_NAME);
2667 if (IS_ERR(tpacpi_hotkey_task)) {
2668 tpacpi_hotkey_task = NULL;
2669 pr_err("could not create kernel thread for hotkey polling\n");
2670 }
2671 }
2672 } else {
2673 hotkey_poll_stop_sync();
2674 if (may_warn && (poll_driver_mask || poll_user_mask) &&
2675 hotkey_poll_freq == 0) {
2676 pr_notice("hot keys 0x%08x and/or events 0x%08x require polling, which is currently disabled\n",
2677 poll_user_mask, poll_driver_mask);
2678 }
2679 }
2680 }
2681
2682 static void hotkey_poll_setup_safe(const bool may_warn)
2683 {
2684 mutex_lock(&hotkey_mutex);
2685 hotkey_poll_setup(may_warn);
2686 mutex_unlock(&hotkey_mutex);
2687 }
2688
2689 /* call with hotkey_mutex held */
2690 static void hotkey_poll_set_freq(unsigned int freq)
2691 {
2692 if (!freq)
2693 hotkey_poll_stop_sync();
2694
2695 hotkey_poll_freq = freq;
2696 }
2697
2698 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2699
2700 static void hotkey_poll_setup(const bool __unused)
2701 {
2702 }
2703
2704 static void hotkey_poll_setup_safe(const bool __unused)
2705 {
2706 }
2707
2708 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2709
2710 static int hotkey_inputdev_open(struct input_dev *dev)
2711 {
2712 switch (tpacpi_lifecycle) {
2713 case TPACPI_LIFE_INIT:
2714 case TPACPI_LIFE_RUNNING:
2715 hotkey_poll_setup_safe(false);
2716 return 0;
2717 case TPACPI_LIFE_EXITING:
2718 return -EBUSY;
2719 }
2720
2721 /* Should only happen if tpacpi_lifecycle is corrupt */
2722 BUG();
2723 return -EBUSY;
2724 }
2725
2726 static void hotkey_inputdev_close(struct input_dev *dev)
2727 {
2728 /* disable hotkey polling when possible */
2729 if (tpacpi_lifecycle != TPACPI_LIFE_EXITING &&
2730 !(hotkey_source_mask & hotkey_driver_mask))
2731 hotkey_poll_setup_safe(false);
2732 }
2733
2734 /* sysfs hotkey enable ------------------------------------------------- */
2735 static ssize_t hotkey_enable_show(struct device *dev,
2736 struct device_attribute *attr,
2737 char *buf)
2738 {
2739 int res, status;
2740
2741 printk_deprecated_attribute("hotkey_enable",
2742 "Hotkey reporting is always enabled");
2743
2744 res = hotkey_status_get(&status);
2745 if (res)
2746 return res;
2747
2748 return snprintf(buf, PAGE_SIZE, "%d\n", status);
2749 }
2750
2751 static ssize_t hotkey_enable_store(struct device *dev,
2752 struct device_attribute *attr,
2753 const char *buf, size_t count)
2754 {
2755 unsigned long t;
2756
2757 printk_deprecated_attribute("hotkey_enable",
2758 "Hotkeys can be disabled through hotkey_mask");
2759
2760 if (parse_strtoul(buf, 1, &t))
2761 return -EINVAL;
2762
2763 if (t == 0)
2764 return -EPERM;
2765
2766 return count;
2767 }
2768
2769 static DEVICE_ATTR_RW(hotkey_enable);
2770
2771 /* sysfs hotkey mask --------------------------------------------------- */
2772 static ssize_t hotkey_mask_show(struct device *dev,
2773 struct device_attribute *attr,
2774 char *buf)
2775 {
2776 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_user_mask);
2777 }
2778
2779 static ssize_t hotkey_mask_store(struct device *dev,
2780 struct device_attribute *attr,
2781 const char *buf, size_t count)
2782 {
2783 unsigned long t;
2784 int res;
2785
2786 if (parse_strtoul(buf, 0xffffffffUL, &t))
2787 return -EINVAL;
2788
2789 if (mutex_lock_killable(&hotkey_mutex))
2790 return -ERESTARTSYS;
2791
2792 res = hotkey_user_mask_set(t);
2793
2794 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2795 hotkey_poll_setup(true);
2796 #endif
2797
2798 mutex_unlock(&hotkey_mutex);
2799
2800 tpacpi_disclose_usertask("hotkey_mask", "set to 0x%08lx\n", t);
2801
2802 return (res) ? res : count;
2803 }
2804
2805 static DEVICE_ATTR_RW(hotkey_mask);
2806
2807 /* sysfs hotkey bios_enabled ------------------------------------------- */
2808 static ssize_t hotkey_bios_enabled_show(struct device *dev,
2809 struct device_attribute *attr,
2810 char *buf)
2811 {
2812 return sprintf(buf, "0\n");
2813 }
2814
2815 static DEVICE_ATTR_RO(hotkey_bios_enabled);
2816
2817 /* sysfs hotkey bios_mask ---------------------------------------------- */
2818 static ssize_t hotkey_bios_mask_show(struct device *dev,
2819 struct device_attribute *attr,
2820 char *buf)
2821 {
2822 printk_deprecated_attribute("hotkey_bios_mask",
2823 "This attribute is useless.");
2824 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_orig_mask);
2825 }
2826
2827 static DEVICE_ATTR_RO(hotkey_bios_mask);
2828
2829 /* sysfs hotkey all_mask ----------------------------------------------- */
2830 static ssize_t hotkey_all_mask_show(struct device *dev,
2831 struct device_attribute *attr,
2832 char *buf)
2833 {
2834 return snprintf(buf, PAGE_SIZE, "0x%08x\n",
2835 hotkey_all_mask | hotkey_source_mask);
2836 }
2837
2838 static DEVICE_ATTR_RO(hotkey_all_mask);
2839
2840 /* sysfs hotkey all_mask ----------------------------------------------- */
2841 static ssize_t hotkey_adaptive_all_mask_show(struct device *dev,
2842 struct device_attribute *attr,
2843 char *buf)
2844 {
2845 return snprintf(buf, PAGE_SIZE, "0x%08x\n",
2846 hotkey_adaptive_all_mask | hotkey_source_mask);
2847 }
2848
2849 static DEVICE_ATTR_RO(hotkey_adaptive_all_mask);
2850
2851 /* sysfs hotkey recommended_mask --------------------------------------- */
2852 static ssize_t hotkey_recommended_mask_show(struct device *dev,
2853 struct device_attribute *attr,
2854 char *buf)
2855 {
2856 return snprintf(buf, PAGE_SIZE, "0x%08x\n",
2857 (hotkey_all_mask | hotkey_source_mask)
2858 & ~hotkey_reserved_mask);
2859 }
2860
2861 static DEVICE_ATTR_RO(hotkey_recommended_mask);
2862
2863 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2864
2865 /* sysfs hotkey hotkey_source_mask ------------------------------------- */
2866 static ssize_t hotkey_source_mask_show(struct device *dev,
2867 struct device_attribute *attr,
2868 char *buf)
2869 {
2870 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_source_mask);
2871 }
2872
2873 static ssize_t hotkey_source_mask_store(struct device *dev,
2874 struct device_attribute *attr,
2875 const char *buf, size_t count)
2876 {
2877 unsigned long t;
2878 u32 r_ev;
2879 int rc;
2880
2881 if (parse_strtoul(buf, 0xffffffffUL, &t) ||
2882 ((t & ~TPACPI_HKEY_NVRAM_KNOWN_MASK) != 0))
2883 return -EINVAL;
2884
2885 if (mutex_lock_killable(&hotkey_mutex))
2886 return -ERESTARTSYS;
2887
2888 HOTKEY_CONFIG_CRITICAL_START
2889 hotkey_source_mask = t;
2890 HOTKEY_CONFIG_CRITICAL_END
2891
2892 rc = hotkey_mask_set((hotkey_user_mask | hotkey_driver_mask) &
2893 ~hotkey_source_mask);
2894 hotkey_poll_setup(true);
2895
2896 /* check if events needed by the driver got disabled */
2897 r_ev = hotkey_driver_mask & ~(hotkey_acpi_mask & hotkey_all_mask)
2898 & ~hotkey_source_mask & TPACPI_HKEY_NVRAM_KNOWN_MASK;
2899
2900 mutex_unlock(&hotkey_mutex);
2901
2902 if (rc < 0)
2903 pr_err("hotkey_source_mask: failed to update the firmware event mask!\n");
2904
2905 if (r_ev)
2906 pr_notice("hotkey_source_mask: some important events were disabled: 0x%04x\n",
2907 r_ev);
2908
2909 tpacpi_disclose_usertask("hotkey_source_mask", "set to 0x%08lx\n", t);
2910
2911 return (rc < 0) ? rc : count;
2912 }
2913
2914 static DEVICE_ATTR_RW(hotkey_source_mask);
2915
2916 /* sysfs hotkey hotkey_poll_freq --------------------------------------- */
2917 static ssize_t hotkey_poll_freq_show(struct device *dev,
2918 struct device_attribute *attr,
2919 char *buf)
2920 {
2921 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_poll_freq);
2922 }
2923
2924 static ssize_t hotkey_poll_freq_store(struct device *dev,
2925 struct device_attribute *attr,
2926 const char *buf, size_t count)
2927 {
2928 unsigned long t;
2929
2930 if (parse_strtoul(buf, 25, &t))
2931 return -EINVAL;
2932
2933 if (mutex_lock_killable(&hotkey_mutex))
2934 return -ERESTARTSYS;
2935
2936 hotkey_poll_set_freq(t);
2937 hotkey_poll_setup(true);
2938
2939 mutex_unlock(&hotkey_mutex);
2940
2941 tpacpi_disclose_usertask("hotkey_poll_freq", "set to %lu\n", t);
2942
2943 return count;
2944 }
2945
2946 static DEVICE_ATTR_RW(hotkey_poll_freq);
2947
2948 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2949
2950 /* sysfs hotkey radio_sw (pollable) ------------------------------------ */
2951 static ssize_t hotkey_radio_sw_show(struct device *dev,
2952 struct device_attribute *attr,
2953 char *buf)
2954 {
2955 int res;
2956 res = hotkey_get_wlsw();
2957 if (res < 0)
2958 return res;
2959
2960 /* Opportunistic update */
2961 tpacpi_rfk_update_hwblock_state((res == TPACPI_RFK_RADIO_OFF));
2962
2963 return snprintf(buf, PAGE_SIZE, "%d\n",
2964 (res == TPACPI_RFK_RADIO_OFF) ? 0 : 1);
2965 }
2966
2967 static DEVICE_ATTR_RO(hotkey_radio_sw);
2968
2969 static void hotkey_radio_sw_notify_change(void)
2970 {
2971 if (tp_features.hotkey_wlsw)
2972 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2973 "hotkey_radio_sw");
2974 }
2975
2976 /* sysfs hotkey tablet mode (pollable) --------------------------------- */
2977 static ssize_t hotkey_tablet_mode_show(struct device *dev,
2978 struct device_attribute *attr,
2979 char *buf)
2980 {
2981 int res, s;
2982 res = hotkey_get_tablet_mode(&s);
2983 if (res < 0)
2984 return res;
2985
2986 return snprintf(buf, PAGE_SIZE, "%d\n", !!s);
2987 }
2988
2989 static DEVICE_ATTR_RO(hotkey_tablet_mode);
2990
2991 static void hotkey_tablet_mode_notify_change(void)
2992 {
2993 if (tp_features.hotkey_tablet)
2994 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2995 "hotkey_tablet_mode");
2996 }
2997
2998 /* sysfs wakeup reason (pollable) -------------------------------------- */
2999 static ssize_t hotkey_wakeup_reason_show(struct device *dev,
3000 struct device_attribute *attr,
3001 char *buf)
3002 {
3003 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_wakeup_reason);
3004 }
3005
3006 static DEVICE_ATTR(wakeup_reason, S_IRUGO, hotkey_wakeup_reason_show, NULL);
3007
3008 static void hotkey_wakeup_reason_notify_change(void)
3009 {
3010 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
3011 "wakeup_reason");
3012 }
3013
3014 /* sysfs wakeup hotunplug_complete (pollable) -------------------------- */
3015 static ssize_t hotkey_wakeup_hotunplug_complete_show(struct device *dev,
3016 struct device_attribute *attr,
3017 char *buf)
3018 {
3019 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_autosleep_ack);
3020 }
3021
3022 static DEVICE_ATTR(wakeup_hotunplug_complete, S_IRUGO,
3023 hotkey_wakeup_hotunplug_complete_show, NULL);
3024
3025 static void hotkey_wakeup_hotunplug_complete_notify_change(void)
3026 {
3027 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
3028 "wakeup_hotunplug_complete");
3029 }
3030
3031 /* sysfs adaptive kbd mode --------------------------------------------- */
3032
3033 static int adaptive_keyboard_get_mode(void);
3034 static int adaptive_keyboard_set_mode(int new_mode);
3035
3036 enum ADAPTIVE_KEY_MODE {
3037 HOME_MODE,
3038 WEB_BROWSER_MODE,
3039 WEB_CONFERENCE_MODE,
3040 FUNCTION_MODE,
3041 LAYFLAT_MODE
3042 };
3043
3044 static ssize_t adaptive_kbd_mode_show(struct device *dev,
3045 struct device_attribute *attr,
3046 char *buf)
3047 {
3048 int current_mode;
3049
3050 current_mode = adaptive_keyboard_get_mode();
3051 if (current_mode < 0)
3052 return current_mode;
3053
3054 return snprintf(buf, PAGE_SIZE, "%d\n", current_mode);
3055 }
3056
3057 static ssize_t adaptive_kbd_mode_store(struct device *dev,
3058 struct device_attribute *attr,
3059 const char *buf, size_t count)
3060 {
3061 unsigned long t;
3062 int res;
3063
3064 if (parse_strtoul(buf, LAYFLAT_MODE, &t))
3065 return -EINVAL;
3066
3067 res = adaptive_keyboard_set_mode(t);
3068 return (res < 0) ? res : count;
3069 }
3070
3071 static DEVICE_ATTR_RW(adaptive_kbd_mode);
3072
3073 static struct attribute *adaptive_kbd_attributes[] = {
3074 &dev_attr_adaptive_kbd_mode.attr,
3075 NULL
3076 };
3077
3078 static const struct attribute_group adaptive_kbd_attr_group = {
3079 .attrs = adaptive_kbd_attributes,
3080 };
3081
3082 /* --------------------------------------------------------------------- */
3083
3084 static struct attribute *hotkey_attributes[] __initdata = {
3085 &dev_attr_hotkey_enable.attr,
3086 &dev_attr_hotkey_bios_enabled.attr,
3087 &dev_attr_hotkey_bios_mask.attr,
3088 &dev_attr_wakeup_reason.attr,
3089 &dev_attr_wakeup_hotunplug_complete.attr,
3090 &dev_attr_hotkey_mask.attr,
3091 &dev_attr_hotkey_all_mask.attr,
3092 &dev_attr_hotkey_adaptive_all_mask.attr,
3093 &dev_attr_hotkey_recommended_mask.attr,
3094 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
3095 &dev_attr_hotkey_source_mask.attr,
3096 &dev_attr_hotkey_poll_freq.attr,
3097 #endif
3098 };
3099
3100 /*
3101 * Sync both the hw and sw blocking state of all switches
3102 */
3103 static void tpacpi_send_radiosw_update(void)
3104 {
3105 int wlsw;
3106
3107 /*
3108 * We must sync all rfkill controllers *before* issuing any
3109 * rfkill input events, or we will race the rfkill core input
3110 * handler.
3111 *
3112 * tpacpi_inputdev_send_mutex works as a synchronization point
3113 * for the above.
3114 *
3115 * We optimize to avoid numerous calls to hotkey_get_wlsw.
3116 */
3117
3118 wlsw = hotkey_get_wlsw();
3119
3120 /* Sync hw blocking state first if it is hw-blocked */
3121 if (wlsw == TPACPI_RFK_RADIO_OFF)
3122 tpacpi_rfk_update_hwblock_state(true);
3123
3124 /* Sync sw blocking state */
3125 tpacpi_rfk_update_swstate_all();
3126
3127 /* Sync hw blocking state last if it is hw-unblocked */
3128 if (wlsw == TPACPI_RFK_RADIO_ON)
3129 tpacpi_rfk_update_hwblock_state(false);
3130
3131 /* Issue rfkill input event for WLSW switch */
3132 if (!(wlsw < 0)) {
3133 mutex_lock(&tpacpi_inputdev_send_mutex);
3134
3135 input_report_switch(tpacpi_inputdev,
3136 SW_RFKILL_ALL, (wlsw > 0));
3137 input_sync(tpacpi_inputdev);
3138
3139 mutex_unlock(&tpacpi_inputdev_send_mutex);
3140 }
3141
3142 /*
3143 * this can be unconditional, as we will poll state again
3144 * if userspace uses the notify to read data
3145 */
3146 hotkey_radio_sw_notify_change();
3147 }
3148
3149 static void hotkey_exit(void)
3150 {
3151 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
3152 mutex_lock(&hotkey_mutex);
3153 hotkey_poll_stop_sync();
3154 mutex_unlock(&hotkey_mutex);
3155 #endif
3156
3157 if (hotkey_dev_attributes)
3158 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
3159
3160 dbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_HKEY,
3161 "restoring original HKEY status and mask\n");
3162 /* yes, there is a bitwise or below, we want the
3163 * functions to be called even if one of them fail */
3164 if (((tp_features.hotkey_mask &&
3165 hotkey_mask_set(hotkey_orig_mask)) |
3166 hotkey_status_set(false)) != 0)
3167 pr_err("failed to restore hot key mask to BIOS defaults\n");
3168 }
3169
3170 static void __init hotkey_unmap(const unsigned int scancode)
3171 {
3172 if (hotkey_keycode_map[scancode] != KEY_RESERVED) {
3173 clear_bit(hotkey_keycode_map[scancode],
3174 tpacpi_inputdev->keybit);
3175 hotkey_keycode_map[scancode] = KEY_RESERVED;
3176 }
3177 }
3178
3179 /*
3180 * HKEY quirks:
3181 * TPACPI_HK_Q_INIMASK: Supports FN+F3,FN+F4,FN+F12
3182 */
3183
3184 #define TPACPI_HK_Q_INIMASK 0x0001
3185
3186 static const struct tpacpi_quirk tpacpi_hotkey_qtable[] __initconst = {
3187 TPACPI_Q_IBM('I', 'H', TPACPI_HK_Q_INIMASK), /* 600E */
3188 TPACPI_Q_IBM('I', 'N', TPACPI_HK_Q_INIMASK), /* 600E */
3189 TPACPI_Q_IBM('I', 'D', TPACPI_HK_Q_INIMASK), /* 770, 770E, 770ED */
3190 TPACPI_Q_IBM('I', 'W', TPACPI_HK_Q_INIMASK), /* A20m */
3191 TPACPI_Q_IBM('I', 'V', TPACPI_HK_Q_INIMASK), /* A20p */
3192 TPACPI_Q_IBM('1', '0', TPACPI_HK_Q_INIMASK), /* A21e, A22e */
3193 TPACPI_Q_IBM('K', 'U', TPACPI_HK_Q_INIMASK), /* A21e */
3194 TPACPI_Q_IBM('K', 'X', TPACPI_HK_Q_INIMASK), /* A21m, A22m */
3195 TPACPI_Q_IBM('K', 'Y', TPACPI_HK_Q_INIMASK), /* A21p, A22p */
3196 TPACPI_Q_IBM('1', 'B', TPACPI_HK_Q_INIMASK), /* A22e */
3197 TPACPI_Q_IBM('1', '3', TPACPI_HK_Q_INIMASK), /* A22m */
3198 TPACPI_Q_IBM('1', 'E', TPACPI_HK_Q_INIMASK), /* A30/p (0) */
3199 TPACPI_Q_IBM('1', 'C', TPACPI_HK_Q_INIMASK), /* R30 */
3200 TPACPI_Q_IBM('1', 'F', TPACPI_HK_Q_INIMASK), /* R31 */
3201 TPACPI_Q_IBM('I', 'Y', TPACPI_HK_Q_INIMASK), /* T20 */
3202 TPACPI_Q_IBM('K', 'Z', TPACPI_HK_Q_INIMASK), /* T21 */
3203 TPACPI_Q_IBM('1', '6', TPACPI_HK_Q_INIMASK), /* T22 */
3204 TPACPI_Q_IBM('I', 'Z', TPACPI_HK_Q_INIMASK), /* X20, X21 */
3205 TPACPI_Q_IBM('1', 'D', TPACPI_HK_Q_INIMASK), /* X22, X23, X24 */
3206 };
3207
3208 typedef u16 tpacpi_keymap_entry_t;
3209 typedef tpacpi_keymap_entry_t tpacpi_keymap_t[TPACPI_HOTKEY_MAP_LEN];
3210
3211 static int hotkey_init_tablet_mode(void)
3212 {
3213 int in_tablet_mode = 0, res;
3214 char *type = NULL;
3215
3216 if (acpi_evalf(hkey_handle, &res, "GMMS", "qdd", 0)) {
3217 int has_tablet_mode;
3218
3219 in_tablet_mode = hotkey_gmms_get_tablet_mode(res,
3220 &has_tablet_mode);
3221 /*
3222 * The Yoga 11e series has 2 accelerometers described by a
3223 * BOSC0200 ACPI node. This setup relies on a Windows service
3224 * which calls special ACPI methods on this node to report
3225 * the laptop/tent/tablet mode to the EC. The bmc150 iio driver
3226 * does not support this, so skip the hotkey on these models.
3227 */
3228 if (has_tablet_mode && !acpi_dev_present("BOSC0200", "1", -1))
3229 tp_features.hotkey_tablet = TP_HOTKEY_TABLET_USES_GMMS;
3230 type = "GMMS";
3231 } else if (acpi_evalf(hkey_handle, &res, "MHKG", "qd")) {
3232 /* For X41t, X60t, X61t Tablets... */
3233 tp_features.hotkey_tablet = TP_HOTKEY_TABLET_USES_MHKG;
3234 in_tablet_mode = !!(res & TP_HOTKEY_TABLET_MASK);
3235 type = "MHKG";
3236 }
3237
3238 if (!tp_features.hotkey_tablet)
3239 return 0;
3240
3241 pr_info("Tablet mode switch found (type: %s), currently in %s mode\n",
3242 type, in_tablet_mode ? "tablet" : "laptop");
3243
3244 res = add_to_attr_set(hotkey_dev_attributes,
3245 &dev_attr_hotkey_tablet_mode.attr);
3246 if (res)
3247 return -1;
3248
3249 return in_tablet_mode;
3250 }
3251
3252 static int __init hotkey_init(struct ibm_init_struct *iibm)
3253 {
3254 /* Requirements for changing the default keymaps:
3255 *
3256 * 1. Many of the keys are mapped to KEY_RESERVED for very
3257 * good reasons. Do not change them unless you have deep
3258 * knowledge on the IBM and Lenovo ThinkPad firmware for
3259 * the various ThinkPad models. The driver behaves
3260 * differently for KEY_RESERVED: such keys have their
3261 * hot key mask *unset* in mask_recommended, and also
3262 * in the initial hot key mask programmed into the
3263 * firmware at driver load time, which means the firm-
3264 * ware may react very differently if you change them to
3265 * something else;
3266 *
3267 * 2. You must be subscribed to the linux-thinkpad and
3268 * ibm-acpi-devel mailing lists, and you should read the
3269 * list archives since 2007 if you want to change the
3270 * keymaps. This requirement exists so that you will
3271 * know the past history of problems with the thinkpad-
3272 * acpi driver keymaps, and also that you will be
3273 * listening to any bug reports;
3274 *
3275 * 3. Do not send thinkpad-acpi specific patches directly to
3276 * for merging, *ever*. Send them to the linux-acpi
3277 * mailinglist for comments. Merging is to be done only
3278 * through acpi-test and the ACPI maintainer.
3279 *
3280 * If the above is too much to ask, don't change the keymap.
3281 * Ask the thinkpad-acpi maintainer to do it, instead.
3282 */
3283
3284 enum keymap_index {
3285 TPACPI_KEYMAP_IBM_GENERIC = 0,
3286 TPACPI_KEYMAP_LENOVO_GENERIC,
3287 };
3288
3289 static const tpacpi_keymap_t tpacpi_keymaps[] __initconst = {
3290 /* Generic keymap for IBM ThinkPads */
3291 [TPACPI_KEYMAP_IBM_GENERIC] = {
3292 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
3293 KEY_FN_F1, KEY_BATTERY, KEY_COFFEE, KEY_SLEEP,
3294 KEY_WLAN, KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
3295 KEY_FN_F9, KEY_FN_F10, KEY_FN_F11, KEY_SUSPEND,
3296
3297 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
3298 KEY_UNKNOWN, /* 0x0C: FN+BACKSPACE */
3299 KEY_UNKNOWN, /* 0x0D: FN+INSERT */
3300 KEY_UNKNOWN, /* 0x0E: FN+DELETE */
3301
3302 /* brightness: firmware always reacts to them */
3303 KEY_RESERVED, /* 0x0F: FN+HOME (brightness up) */
3304 KEY_RESERVED, /* 0x10: FN+END (brightness down) */
3305
3306 /* Thinklight: firmware always react to it */
3307 KEY_RESERVED, /* 0x11: FN+PGUP (thinklight toggle) */
3308
3309 KEY_UNKNOWN, /* 0x12: FN+PGDOWN */
3310 KEY_ZOOM, /* 0x13: FN+SPACE (zoom) */
3311
3312 /* Volume: firmware always react to it and reprograms
3313 * the built-in *extra* mixer. Never map it to control
3314 * another mixer by default. */
3315 KEY_RESERVED, /* 0x14: VOLUME UP */
3316 KEY_RESERVED, /* 0x15: VOLUME DOWN */
3317 KEY_RESERVED, /* 0x16: MUTE */
3318
3319 KEY_VENDOR, /* 0x17: Thinkpad/AccessIBM/Lenovo */
3320
3321 /* (assignments unknown, please report if found) */
3322 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3323 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3324
3325 /* No assignments, only used for Adaptive keyboards. */
3326 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3327 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3328 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3329 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3330 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3331
3332 /* No assignment, used for newer Lenovo models */
3333 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3334 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3335 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3336 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3337 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3338 KEY_UNKNOWN, KEY_UNKNOWN
3339
3340 },
3341
3342 /* Generic keymap for Lenovo ThinkPads */
3343 [TPACPI_KEYMAP_LENOVO_GENERIC] = {
3344 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
3345 KEY_FN_F1, KEY_COFFEE, KEY_BATTERY, KEY_SLEEP,
3346 KEY_WLAN, KEY_CAMERA, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
3347 KEY_FN_F9, KEY_FN_F10, KEY_FN_F11, KEY_SUSPEND,
3348
3349 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
3350 KEY_UNKNOWN, /* 0x0C: FN+BACKSPACE */
3351 KEY_UNKNOWN, /* 0x0D: FN+INSERT */
3352 KEY_UNKNOWN, /* 0x0E: FN+DELETE */
3353
3354 /* These should be enabled --only-- when ACPI video
3355 * is disabled (i.e. in "vendor" mode), and are handled
3356 * in a special way by the init code */
3357 KEY_BRIGHTNESSUP, /* 0x0F: FN+HOME (brightness up) */
3358 KEY_BRIGHTNESSDOWN, /* 0x10: FN+END (brightness down) */
3359
3360 KEY_RESERVED, /* 0x11: FN+PGUP (thinklight toggle) */
3361
3362 KEY_UNKNOWN, /* 0x12: FN+PGDOWN */
3363 KEY_ZOOM, /* 0x13: FN+SPACE (zoom) */
3364
3365 /* Volume: z60/z61, T60 (BIOS version?): firmware always
3366 * react to it and reprograms the built-in *extra* mixer.
3367 * Never map it to control another mixer by default.
3368 *
3369 * T60?, T61, R60?, R61: firmware and EC tries to send
3370 * these over the regular keyboard, so these are no-ops,
3371 * but there are still weird bugs re. MUTE, so do not
3372 * change unless you get test reports from all Lenovo
3373 * models. May cause the BIOS to interfere with the
3374 * HDA mixer.
3375 */
3376 KEY_RESERVED, /* 0x14: VOLUME UP */
3377 KEY_RESERVED, /* 0x15: VOLUME DOWN */
3378 KEY_RESERVED, /* 0x16: MUTE */
3379
3380 KEY_VENDOR, /* 0x17: Thinkpad/AccessIBM/Lenovo */
3381
3382 /* (assignments unknown, please report if found) */
3383 KEY_UNKNOWN, KEY_UNKNOWN,
3384
3385 /*
3386 * The mic mute button only sends 0x1a. It does not
3387 * automatically mute the mic or change the mute light.
3388 */
3389 KEY_MICMUTE, /* 0x1a: Mic mute (since ?400 or so) */
3390
3391 /* (assignments unknown, please report if found) */
3392 KEY_UNKNOWN,
3393
3394 /* Extra keys in use since the X240 / T440 / T540 */
3395 KEY_CONFIG, KEY_SEARCH, KEY_SCALE, KEY_FILE,
3396
3397 /*
3398 * These are the adaptive keyboard keycodes for Carbon X1 2014.
3399 * The first item in this list is the Mute button which is
3400 * emitted with 0x103 through
3401 * adaptive_keyboard_hotkey_notify_hotkey() when the sound
3402 * symbol is held.
3403 * We'll need to offset those by 0x20.
3404 */
3405 KEY_RESERVED, /* Mute held, 0x103 */
3406 KEY_BRIGHTNESS_MIN, /* Backlight off */
3407 KEY_RESERVED, /* Clipping tool */
3408 KEY_RESERVED, /* Cloud */
3409 KEY_RESERVED,
3410 KEY_VOICECOMMAND, /* Voice */
3411 KEY_RESERVED,
3412 KEY_RESERVED, /* Gestures */
3413 KEY_RESERVED,
3414 KEY_RESERVED,
3415 KEY_RESERVED,
3416 KEY_CONFIG, /* Settings */
3417 KEY_RESERVED, /* New tab */
3418 KEY_REFRESH, /* Reload */
3419 KEY_BACK, /* Back */
3420 KEY_RESERVED, /* Microphone down */
3421 KEY_RESERVED, /* Microphone up */
3422 KEY_RESERVED, /* Microphone cancellation */
3423 KEY_RESERVED, /* Camera mode */
3424 KEY_RESERVED, /* Rotate display, 0x116 */
3425
3426 /*
3427 * These are found in 2017 models (e.g. T470s, X270).
3428 * The lowest known value is 0x311, which according to
3429 * the manual should launch a user defined favorite
3430 * application.
3431 *
3432 * The offset for these is TP_ACPI_HOTKEYSCAN_EXTENDED_START,
3433 * corresponding to 0x34.
3434 */
3435
3436 /* (assignments unknown, please report if found) */
3437 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3438 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3439 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3440 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3441 KEY_UNKNOWN,
3442
3443 KEY_BOOKMARKS, /* Favorite app, 0x311 */
3444 KEY_SELECTIVE_SCREENSHOT, /* Clipping tool */
3445 KEY_CALC, /* Calculator (above numpad, P52) */
3446 KEY_BLUETOOTH, /* Bluetooth */
3447 KEY_KEYBOARD, /* Keyboard, 0x315 */
3448 KEY_FN_RIGHT_SHIFT, /* Fn + right Shift */
3449 KEY_NOTIFICATION_CENTER, /* Notification Center */
3450 KEY_PICKUP_PHONE, /* Answer incoming call */
3451 KEY_HANGUP_PHONE, /* Decline incoming call */
3452 },
3453 };
3454
3455 static const struct tpacpi_quirk tpacpi_keymap_qtable[] __initconst = {
3456 /* Generic maps (fallback) */
3457 {
3458 .vendor = PCI_VENDOR_ID_IBM,
3459 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY,
3460 .quirks = TPACPI_KEYMAP_IBM_GENERIC,
3461 },
3462 {
3463 .vendor = PCI_VENDOR_ID_LENOVO,
3464 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY,
3465 .quirks = TPACPI_KEYMAP_LENOVO_GENERIC,
3466 },
3467 };
3468
3469 #define TPACPI_HOTKEY_MAP_SIZE sizeof(tpacpi_keymap_t)
3470 #define TPACPI_HOTKEY_MAP_TYPESIZE sizeof(tpacpi_keymap_entry_t)
3471
3472 int res, i;
3473 int status;
3474 int hkeyv;
3475 bool radiosw_state = false;
3476 bool tabletsw_state = false;
3477
3478 unsigned long quirks;
3479 unsigned long keymap_id;
3480
3481 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3482 "initializing hotkey subdriver\n");
3483
3484 BUG_ON(!tpacpi_inputdev);
3485 BUG_ON(tpacpi_inputdev->open != NULL ||
3486 tpacpi_inputdev->close != NULL);
3487
3488 TPACPI_ACPIHANDLE_INIT(hkey);
3489 mutex_init(&hotkey_mutex);
3490
3491 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
3492 mutex_init(&hotkey_thread_data_mutex);
3493 #endif
3494
3495 /* hotkey not supported on 570 */
3496 tp_features.hotkey = hkey_handle != NULL;
3497
3498 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3499 "hotkeys are %s\n",
3500 str_supported(tp_features.hotkey));
3501
3502 if (!tp_features.hotkey)
3503 return 1;
3504
3505 quirks = tpacpi_check_quirks(tpacpi_hotkey_qtable,
3506 ARRAY_SIZE(tpacpi_hotkey_qtable));
3507
3508 tpacpi_disable_brightness_delay();
3509
3510 /* MUST have enough space for all attributes to be added to
3511 * hotkey_dev_attributes */
3512 hotkey_dev_attributes = create_attr_set(
3513 ARRAY_SIZE(hotkey_attributes) + 2,
3514 NULL);
3515 if (!hotkey_dev_attributes)
3516 return -ENOMEM;
3517 res = add_many_to_attr_set(hotkey_dev_attributes,
3518 hotkey_attributes,
3519 ARRAY_SIZE(hotkey_attributes));
3520 if (res)
3521 goto err_exit;
3522
3523 /* mask not supported on 600e/x, 770e, 770x, A21e, A2xm/p,
3524 A30, R30, R31, T20-22, X20-21, X22-24. Detected by checking
3525 for HKEY interface version 0x100 */
3526 if (acpi_evalf(hkey_handle, &hkeyv, "MHKV", "qd")) {
3527 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3528 "firmware HKEY interface version: 0x%x\n",
3529 hkeyv);
3530
3531 switch (hkeyv >> 8) {
3532 case 1:
3533 /*
3534 * MHKV 0x100 in A31, R40, R40e,
3535 * T4x, X31, and later
3536 */
3537
3538 /* Paranoia check AND init hotkey_all_mask */
3539 if (!acpi_evalf(hkey_handle, &hotkey_all_mask,
3540 "MHKA", "qd")) {
3541 pr_err("missing MHKA handler, please report this to %s\n",
3542 TPACPI_MAIL);
3543 /* Fallback: pre-init for FN+F3,F4,F12 */
3544 hotkey_all_mask = 0x080cU;
3545 } else {
3546 tp_features.hotkey_mask = 1;
3547 }
3548 break;
3549
3550 case 2:
3551 /*
3552 * MHKV 0x200 in X1, T460s, X260, T560, X1 Tablet (2016)
3553 */
3554
3555 /* Paranoia check AND init hotkey_all_mask */
3556 if (!acpi_evalf(hkey_handle, &hotkey_all_mask,
3557 "MHKA", "dd", 1)) {
3558 pr_err("missing MHKA handler, please report this to %s\n",
3559 TPACPI_MAIL);
3560 /* Fallback: pre-init for FN+F3,F4,F12 */
3561 hotkey_all_mask = 0x080cU;
3562 } else {
3563 tp_features.hotkey_mask = 1;
3564 }
3565
3566 /*
3567 * Check if we have an adaptive keyboard, like on the
3568 * Lenovo Carbon X1 2014 (2nd Gen).
3569 */
3570 if (acpi_evalf(hkey_handle, &hotkey_adaptive_all_mask,
3571 "MHKA", "dd", 2)) {
3572 if (hotkey_adaptive_all_mask != 0) {
3573 tp_features.has_adaptive_kbd = true;
3574 res = sysfs_create_group(
3575 &tpacpi_pdev->dev.kobj,
3576 &adaptive_kbd_attr_group);
3577 if (res)
3578 goto err_exit;
3579 }
3580 } else {
3581 tp_features.has_adaptive_kbd = false;
3582 hotkey_adaptive_all_mask = 0x0U;
3583 }
3584 break;
3585
3586 default:
3587 pr_err("unknown version of the HKEY interface: 0x%x\n",
3588 hkeyv);
3589 pr_err("please report this to %s\n", TPACPI_MAIL);
3590 break;
3591 }
3592 }
3593
3594 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3595 "hotkey masks are %s\n",
3596 str_supported(tp_features.hotkey_mask));
3597
3598 /* Init hotkey_all_mask if not initialized yet */
3599 if (!tp_features.hotkey_mask && !hotkey_all_mask &&
3600 (quirks & TPACPI_HK_Q_INIMASK))
3601 hotkey_all_mask = 0x080cU; /* FN+F12, FN+F4, FN+F3 */
3602
3603 /* Init hotkey_acpi_mask and hotkey_orig_mask */
3604 if (tp_features.hotkey_mask) {
3605 /* hotkey_source_mask *must* be zero for
3606 * the first hotkey_mask_get to return hotkey_orig_mask */
3607 res = hotkey_mask_get();
3608 if (res)
3609 goto err_exit;
3610
3611 hotkey_orig_mask = hotkey_acpi_mask;
3612 } else {
3613 hotkey_orig_mask = hotkey_all_mask;
3614 hotkey_acpi_mask = hotkey_all_mask;
3615 }
3616
3617 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3618 if (dbg_wlswemul) {
3619 tp_features.hotkey_wlsw = 1;
3620 radiosw_state = !!tpacpi_wlsw_emulstate;
3621 pr_info("radio switch emulation enabled\n");
3622 } else
3623 #endif
3624 /* Not all thinkpads have a hardware radio switch */
3625 if (acpi_evalf(hkey_handle, &status, "WLSW", "qd")) {
3626 tp_features.hotkey_wlsw = 1;
3627 radiosw_state = !!status;
3628 pr_info("radio switch found; radios are %s\n",
3629 enabled(status, 0));
3630 }
3631 if (tp_features.hotkey_wlsw)
3632 res = add_to_attr_set(hotkey_dev_attributes,
3633 &dev_attr_hotkey_radio_sw.attr);
3634
3635 res = hotkey_init_tablet_mode();
3636 if (res < 0)
3637 goto err_exit;
3638
3639 tabletsw_state = res;
3640
3641 res = register_attr_set_with_sysfs(hotkey_dev_attributes,
3642 &tpacpi_pdev->dev.kobj);
3643 if (res)
3644 goto err_exit;
3645
3646 /* Set up key map */
3647 keymap_id = tpacpi_check_quirks(tpacpi_keymap_qtable,
3648 ARRAY_SIZE(tpacpi_keymap_qtable));
3649 BUG_ON(keymap_id >= ARRAY_SIZE(tpacpi_keymaps));
3650 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3651 "using keymap number %lu\n", keymap_id);
3652
3653 hotkey_keycode_map = kmemdup(&tpacpi_keymaps[keymap_id],
3654 TPACPI_HOTKEY_MAP_SIZE, GFP_KERNEL);
3655 if (!hotkey_keycode_map) {
3656 pr_err("failed to allocate memory for key map\n");
3657 res = -ENOMEM;
3658 goto err_exit;
3659 }
3660
3661 input_set_capability(tpacpi_inputdev, EV_MSC, MSC_SCAN);
3662 tpacpi_inputdev->keycodesize = TPACPI_HOTKEY_MAP_TYPESIZE;
3663 tpacpi_inputdev->keycodemax = TPACPI_HOTKEY_MAP_LEN;
3664 tpacpi_inputdev->keycode = hotkey_keycode_map;
3665 for (i = 0; i < TPACPI_HOTKEY_MAP_LEN; i++) {
3666 if (hotkey_keycode_map[i] != KEY_RESERVED) {
3667 input_set_capability(tpacpi_inputdev, EV_KEY,
3668 hotkey_keycode_map[i]);
3669 } else {
3670 if (i < sizeof(hotkey_reserved_mask)*8)
3671 hotkey_reserved_mask |= 1 << i;
3672 }
3673 }
3674
3675 if (tp_features.hotkey_wlsw) {
3676 input_set_capability(tpacpi_inputdev, EV_SW, SW_RFKILL_ALL);
3677 input_report_switch(tpacpi_inputdev,
3678 SW_RFKILL_ALL, radiosw_state);
3679 }
3680 if (tp_features.hotkey_tablet) {
3681 input_set_capability(tpacpi_inputdev, EV_SW, SW_TABLET_MODE);
3682 input_report_switch(tpacpi_inputdev,
3683 SW_TABLET_MODE, tabletsw_state);
3684 }
3685
3686 /* Do not issue duplicate brightness change events to
3687 * userspace. tpacpi_detect_brightness_capabilities() must have
3688 * been called before this point */
3689 if (acpi_video_get_backlight_type() != acpi_backlight_vendor) {
3690 pr_info("This ThinkPad has standard ACPI backlight brightness control, supported by the ACPI video driver\n");
3691 pr_notice("Disabling thinkpad-acpi brightness events by default...\n");
3692
3693 /* Disable brightness up/down on Lenovo thinkpads when
3694 * ACPI is handling them, otherwise it is plain impossible
3695 * for userspace to do something even remotely sane */
3696 hotkey_reserved_mask |=
3697 (1 << TP_ACPI_HOTKEYSCAN_FNHOME)
3698 | (1 << TP_ACPI_HOTKEYSCAN_FNEND);
3699 hotkey_unmap(TP_ACPI_HOTKEYSCAN_FNHOME);
3700 hotkey_unmap(TP_ACPI_HOTKEYSCAN_FNEND);
3701 }
3702
3703 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
3704 hotkey_source_mask = TPACPI_HKEY_NVRAM_GOOD_MASK
3705 & ~hotkey_all_mask
3706 & ~hotkey_reserved_mask;
3707
3708 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3709 "hotkey source mask 0x%08x, polling freq %u\n",
3710 hotkey_source_mask, hotkey_poll_freq);
3711 #endif
3712
3713 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3714 "enabling firmware HKEY event interface...\n");
3715 res = hotkey_status_set(true);
3716 if (res) {
3717 hotkey_exit();
3718 return res;
3719 }
3720 res = hotkey_mask_set(((hotkey_all_mask & ~hotkey_reserved_mask)
3721 | hotkey_driver_mask)
3722 & ~hotkey_source_mask);
3723 if (res < 0 && res != -ENXIO) {
3724 hotkey_exit();
3725 return res;
3726 }
3727 hotkey_user_mask = (hotkey_acpi_mask | hotkey_source_mask)
3728 & ~hotkey_reserved_mask;
3729 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3730 "initial masks: user=0x%08x, fw=0x%08x, poll=0x%08x\n",
3731 hotkey_user_mask, hotkey_acpi_mask, hotkey_source_mask);
3732
3733 tpacpi_inputdev->open = &hotkey_inputdev_open;
3734 tpacpi_inputdev->close = &hotkey_inputdev_close;
3735
3736 hotkey_poll_setup_safe(true);
3737
3738 return 0;
3739
3740 err_exit:
3741 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
3742 sysfs_remove_group(&tpacpi_pdev->dev.kobj,
3743 &adaptive_kbd_attr_group);
3744
3745 hotkey_dev_attributes = NULL;
3746
3747 return (res < 0) ? res : 1;
3748 }
3749
3750 /* Thinkpad X1 Carbon support 5 modes including Home mode, Web browser
3751 * mode, Web conference mode, Function mode and Lay-flat mode.
3752 * We support Home mode and Function mode currently.
3753 *
3754 * Will consider support rest of modes in future.
3755 *
3756 */
3757 static const int adaptive_keyboard_modes[] = {
3758 HOME_MODE,
3759 /* WEB_BROWSER_MODE = 2,
3760 WEB_CONFERENCE_MODE = 3, */
3761 FUNCTION_MODE
3762 };
3763
3764 #define DFR_CHANGE_ROW 0x101
3765 #define DFR_SHOW_QUICKVIEW_ROW 0x102
3766 #define FIRST_ADAPTIVE_KEY 0x103
3767
3768 /* press Fn key a while second, it will switch to Function Mode. Then
3769 * release Fn key, previous mode be restored.
3770 */
3771 static bool adaptive_keyboard_mode_is_saved;
3772 static int adaptive_keyboard_prev_mode;
3773
3774 static int adaptive_keyboard_get_mode(void)
3775 {
3776 int mode = 0;
3777
3778 if (!acpi_evalf(hkey_handle, &mode, "GTRW", "dd", 0)) {
3779 pr_err("Cannot read adaptive keyboard mode\n");
3780 return -EIO;
3781 }
3782
3783 return mode;
3784 }
3785
3786 static int adaptive_keyboard_set_mode(int new_mode)
3787 {
3788 if (new_mode < 0 ||
3789 new_mode > LAYFLAT_MODE)
3790 return -EINVAL;
3791
3792 if (!acpi_evalf(hkey_handle, NULL, "STRW", "vd", new_mode)) {
3793 pr_err("Cannot set adaptive keyboard mode\n");
3794 return -EIO;
3795 }
3796
3797 return 0;
3798 }
3799
3800 static int adaptive_keyboard_get_next_mode(int mode)
3801 {
3802 size_t i;
3803 size_t max_mode = ARRAY_SIZE(adaptive_keyboard_modes) - 1;
3804
3805 for (i = 0; i <= max_mode; i++) {
3806 if (adaptive_keyboard_modes[i] == mode)
3807 break;
3808 }
3809
3810 if (i >= max_mode)
3811 i = 0;
3812 else
3813 i++;
3814
3815 return adaptive_keyboard_modes[i];
3816 }
3817
3818 static bool adaptive_keyboard_hotkey_notify_hotkey(unsigned int scancode)
3819 {
3820 int current_mode = 0;
3821 int new_mode = 0;
3822 int keycode;
3823
3824 switch (scancode) {
3825 case DFR_CHANGE_ROW:
3826 if (adaptive_keyboard_mode_is_saved) {
3827 new_mode = adaptive_keyboard_prev_mode;
3828 adaptive_keyboard_mode_is_saved = false;
3829 } else {
3830 current_mode = adaptive_keyboard_get_mode();
3831 if (current_mode < 0)
3832 return false;
3833 new_mode = adaptive_keyboard_get_next_mode(
3834 current_mode);
3835 }
3836
3837 if (adaptive_keyboard_set_mode(new_mode) < 0)
3838 return false;
3839
3840 return true;
3841
3842 case DFR_SHOW_QUICKVIEW_ROW:
3843 current_mode = adaptive_keyboard_get_mode();
3844 if (current_mode < 0)
3845 return false;
3846
3847 adaptive_keyboard_prev_mode = current_mode;
3848 adaptive_keyboard_mode_is_saved = true;
3849
3850 if (adaptive_keyboard_set_mode (FUNCTION_MODE) < 0)
3851 return false;
3852 return true;
3853
3854 default:
3855 if (scancode < FIRST_ADAPTIVE_KEY ||
3856 scancode >= FIRST_ADAPTIVE_KEY +
3857 TP_ACPI_HOTKEYSCAN_EXTENDED_START -
3858 TP_ACPI_HOTKEYSCAN_ADAPTIVE_START) {
3859 pr_info("Unhandled adaptive keyboard key: 0x%x\n",
3860 scancode);
3861 return false;
3862 }
3863 keycode = hotkey_keycode_map[scancode - FIRST_ADAPTIVE_KEY +
3864 TP_ACPI_HOTKEYSCAN_ADAPTIVE_START];
3865 if (keycode != KEY_RESERVED) {
3866 mutex_lock(&tpacpi_inputdev_send_mutex);
3867
3868 input_report_key(tpacpi_inputdev, keycode, 1);
3869 input_sync(tpacpi_inputdev);
3870
3871 input_report_key(tpacpi_inputdev, keycode, 0);
3872 input_sync(tpacpi_inputdev);
3873
3874 mutex_unlock(&tpacpi_inputdev_send_mutex);
3875 }
3876 return true;
3877 }
3878 }
3879
3880 static bool hotkey_notify_hotkey(const u32 hkey,
3881 bool *send_acpi_ev,
3882 bool *ignore_acpi_ev)
3883 {
3884 /* 0x1000-0x1FFF: key presses */
3885 unsigned int scancode = hkey & 0xfff;
3886 *send_acpi_ev = true;
3887 *ignore_acpi_ev = false;
3888
3889 /*
3890 * Original events are in the 0x10XX range, the adaptive keyboard
3891 * found in 2014 X1 Carbon emits events are of 0x11XX. In 2017
3892 * models, additional keys are emitted through 0x13XX.
3893 */
3894 switch ((hkey >> 8) & 0xf) {
3895 case 0:
3896 if (scancode > 0 &&
3897 scancode <= TP_ACPI_HOTKEYSCAN_ADAPTIVE_START) {
3898 /* HKEY event 0x1001 is scancode 0x00 */
3899 scancode--;
3900 if (!(hotkey_source_mask & (1 << scancode))) {
3901 tpacpi_input_send_key_masked(scancode);
3902 *send_acpi_ev = false;
3903 } else {
3904 *ignore_acpi_ev = true;
3905 }
3906 return true;
3907 }
3908 break;
3909
3910 case 1:
3911 return adaptive_keyboard_hotkey_notify_hotkey(scancode);
3912
3913 case 3:
3914 /* Extended keycodes start at 0x300 and our offset into the map
3915 * TP_ACPI_HOTKEYSCAN_EXTENDED_START. The calculated scancode
3916 * will be positive, but might not be in the correct range.
3917 */
3918 scancode -= (0x300 - TP_ACPI_HOTKEYSCAN_EXTENDED_START);
3919 if (scancode >= TP_ACPI_HOTKEYSCAN_EXTENDED_START &&
3920 scancode < TPACPI_HOTKEY_MAP_LEN) {
3921 tpacpi_input_send_key(scancode);
3922 return true;
3923 }
3924 break;
3925 }
3926
3927 return false;
3928 }
3929
3930 static bool hotkey_notify_wakeup(const u32 hkey,
3931 bool *send_acpi_ev,
3932 bool *ignore_acpi_ev)
3933 {
3934 /* 0x2000-0x2FFF: Wakeup reason */
3935 *send_acpi_ev = true;
3936 *ignore_acpi_ev = false;
3937
3938 switch (hkey) {
3939 case TP_HKEY_EV_WKUP_S3_UNDOCK: /* suspend, undock */
3940 case TP_HKEY_EV_WKUP_S4_UNDOCK: /* hibernation, undock */
3941 hotkey_wakeup_reason = TP_ACPI_WAKEUP_UNDOCK;
3942 *ignore_acpi_ev = true;
3943 break;
3944
3945 case TP_HKEY_EV_WKUP_S3_BAYEJ: /* suspend, bay eject */
3946 case TP_HKEY_EV_WKUP_S4_BAYEJ: /* hibernation, bay eject */
3947 hotkey_wakeup_reason = TP_ACPI_WAKEUP_BAYEJ;
3948 *ignore_acpi_ev = true;
3949 break;
3950
3951 case TP_HKEY_EV_WKUP_S3_BATLOW: /* Battery on critical low level/S3 */
3952 case TP_HKEY_EV_WKUP_S4_BATLOW: /* Battery on critical low level/S4 */
3953 pr_alert("EMERGENCY WAKEUP: battery almost empty\n");
3954 /* how to auto-heal: */
3955 /* 2313: woke up from S3, go to S4/S5 */
3956 /* 2413: woke up from S4, go to S5 */
3957 break;
3958
3959 default:
3960 return false;
3961 }
3962
3963 if (hotkey_wakeup_reason != TP_ACPI_WAKEUP_NONE) {
3964 pr_info("woke up due to a hot-unplug request...\n");
3965 hotkey_wakeup_reason_notify_change();
3966 }
3967 return true;
3968 }
3969
3970 static bool hotkey_notify_dockevent(const u32 hkey,
3971 bool *send_acpi_ev,
3972 bool *ignore_acpi_ev)
3973 {
3974 /* 0x4000-0x4FFF: dock-related events */
3975 *send_acpi_ev = true;
3976 *ignore_acpi_ev = false;
3977
3978 switch (hkey) {
3979 case TP_HKEY_EV_UNDOCK_ACK:
3980 /* ACPI undock operation completed after wakeup */
3981 hotkey_autosleep_ack = 1;
3982 pr_info("undocked\n");
3983 hotkey_wakeup_hotunplug_complete_notify_change();
3984 return true;
3985
3986 case TP_HKEY_EV_HOTPLUG_DOCK: /* docked to port replicator */
3987 pr_info("docked into hotplug port replicator\n");
3988 return true;
3989 case TP_HKEY_EV_HOTPLUG_UNDOCK: /* undocked from port replicator */
3990 pr_info("undocked from hotplug port replicator\n");
3991 return true;
3992
3993 default:
3994 return false;
3995 }
3996 }
3997
3998 static bool hotkey_notify_usrevent(const u32 hkey,
3999 bool *send_acpi_ev,
4000 bool *ignore_acpi_ev)
4001 {
4002 /* 0x5000-0x5FFF: human interface helpers */
4003 *send_acpi_ev = true;
4004 *ignore_acpi_ev = false;
4005
4006 switch (hkey) {
4007 case TP_HKEY_EV_PEN_INSERTED: /* X61t: tablet pen inserted into bay */
4008 case TP_HKEY_EV_PEN_REMOVED: /* X61t: tablet pen removed from bay */
4009 return true;
4010
4011 case TP_HKEY_EV_TABLET_TABLET: /* X41t-X61t: tablet mode */
4012 case TP_HKEY_EV_TABLET_NOTEBOOK: /* X41t-X61t: normal mode */
4013 tpacpi_input_send_tabletsw();
4014 hotkey_tablet_mode_notify_change();
4015 *send_acpi_ev = false;
4016 return true;
4017
4018 case TP_HKEY_EV_LID_CLOSE: /* Lid closed */
4019 case TP_HKEY_EV_LID_OPEN: /* Lid opened */
4020 case TP_HKEY_EV_BRGHT_CHANGED: /* brightness changed */
4021 /* do not propagate these events */
4022 *ignore_acpi_ev = true;
4023 return true;
4024
4025 default:
4026 return false;
4027 }
4028 }
4029
4030 static void thermal_dump_all_sensors(void);
4031 static void palmsensor_refresh(void);
4032
4033 static bool hotkey_notify_6xxx(const u32 hkey,
4034 bool *send_acpi_ev,
4035 bool *ignore_acpi_ev)
4036 {
4037 /* 0x6000-0x6FFF: thermal alarms/notices and keyboard events */
4038 *send_acpi_ev = true;
4039 *ignore_acpi_ev = false;
4040
4041 switch (hkey) {
4042 case TP_HKEY_EV_THM_TABLE_CHANGED:
4043 pr_debug("EC reports: Thermal Table has changed\n");
4044 /* recommended action: do nothing, we don't have
4045 * Lenovo ATM information */
4046 return true;
4047 case TP_HKEY_EV_THM_CSM_COMPLETED:
4048 pr_debug("EC reports: Thermal Control Command set completed (DYTC)\n");
4049 /* Thermal event - pass on to event handler */
4050 tpacpi_driver_event(hkey);
4051 return true;
4052 case TP_HKEY_EV_THM_TRANSFM_CHANGED:
4053 pr_debug("EC reports: Thermal Transformation changed (GMTS)\n");
4054 /* recommended action: do nothing, we don't have
4055 * Lenovo ATM information */
4056 return true;
4057 case TP_HKEY_EV_ALARM_BAT_HOT:
4058 pr_crit("THERMAL ALARM: battery is too hot!\n");
4059 /* recommended action: warn user through gui */
4060 break;
4061 case TP_HKEY_EV_ALARM_BAT_XHOT:
4062 pr_alert("THERMAL EMERGENCY: battery is extremely hot!\n");
4063 /* recommended action: immediate sleep/hibernate */
4064 break;
4065 case TP_HKEY_EV_ALARM_SENSOR_HOT:
4066 pr_crit("THERMAL ALARM: a sensor reports something is too hot!\n");
4067 /* recommended action: warn user through gui, that */
4068 /* some internal component is too hot */
4069 break;
4070 case TP_HKEY_EV_ALARM_SENSOR_XHOT:
4071 pr_alert("THERMAL EMERGENCY: a sensor reports something is extremely hot!\n");
4072 /* recommended action: immediate sleep/hibernate */
4073 break;
4074 case TP_HKEY_EV_AC_CHANGED:
4075 /* X120e, X121e, X220, X220i, X220t, X230, T420, T420s, W520:
4076 * AC status changed; can be triggered by plugging or
4077 * unplugging AC adapter, docking or undocking. */
4078
4079 fallthrough;
4080
4081 case TP_HKEY_EV_KEY_NUMLOCK:
4082 case TP_HKEY_EV_KEY_FN:
4083 case TP_HKEY_EV_KEY_FN_ESC:
4084 /* key press events, we just ignore them as long as the EC
4085 * is still reporting them in the normal keyboard stream */
4086 *send_acpi_ev = false;
4087 *ignore_acpi_ev = true;
4088 return true;
4089
4090 case TP_HKEY_EV_TABLET_CHANGED:
4091 tpacpi_input_send_tabletsw();
4092 hotkey_tablet_mode_notify_change();
4093 *send_acpi_ev = false;
4094 return true;
4095
4096 case TP_HKEY_EV_PALM_DETECTED:
4097 case TP_HKEY_EV_PALM_UNDETECTED:
4098 /* palm detected - pass on to event handler */
4099 palmsensor_refresh();
4100 return true;
4101
4102 default:
4103 /* report simply as unknown, no sensor dump */
4104 return false;
4105 }
4106
4107 thermal_dump_all_sensors();
4108 return true;
4109 }
4110
4111 static void hotkey_notify(struct ibm_struct *ibm, u32 event)
4112 {
4113 u32 hkey;
4114 bool send_acpi_ev;
4115 bool ignore_acpi_ev;
4116 bool known_ev;
4117
4118 if (event != 0x80) {
4119 pr_err("unknown HKEY notification event %d\n", event);
4120 /* forward it to userspace, maybe it knows how to handle it */
4121 acpi_bus_generate_netlink_event(
4122 ibm->acpi->device->pnp.device_class,
4123 dev_name(&ibm->acpi->device->dev),
4124 event, 0);
4125 return;
4126 }
4127
4128 while (1) {
4129 if (!acpi_evalf(hkey_handle, &hkey, "MHKP", "d")) {
4130 pr_err("failed to retrieve HKEY event\n");
4131 return;
4132 }
4133
4134 if (hkey == 0) {
4135 /* queue empty */
4136 return;
4137 }
4138
4139 send_acpi_ev = true;
4140 ignore_acpi_ev = false;
4141
4142 switch (hkey >> 12) {
4143 case 1:
4144 /* 0x1000-0x1FFF: key presses */
4145 known_ev = hotkey_notify_hotkey(hkey, &send_acpi_ev,
4146 &ignore_acpi_ev);
4147 break;
4148 case 2:
4149 /* 0x2000-0x2FFF: Wakeup reason */
4150 known_ev = hotkey_notify_wakeup(hkey, &send_acpi_ev,
4151 &ignore_acpi_ev);
4152 break;
4153 case 3:
4154 /* 0x3000-0x3FFF: bay-related wakeups */
4155 switch (hkey) {
4156 case TP_HKEY_EV_BAYEJ_ACK:
4157 hotkey_autosleep_ack = 1;
4158 pr_info("bay ejected\n");
4159 hotkey_wakeup_hotunplug_complete_notify_change();
4160 known_ev = true;
4161 break;
4162 case TP_HKEY_EV_OPTDRV_EJ:
4163 /* FIXME: kick libata if SATA link offline */
4164 known_ev = true;
4165 break;
4166 default:
4167 known_ev = false;
4168 }
4169 break;
4170 case 4:
4171 /* 0x4000-0x4FFF: dock-related events */
4172 known_ev = hotkey_notify_dockevent(hkey, &send_acpi_ev,
4173 &ignore_acpi_ev);
4174 break;
4175 case 5:
4176 /* 0x5000-0x5FFF: human interface helpers */
4177 known_ev = hotkey_notify_usrevent(hkey, &send_acpi_ev,
4178 &ignore_acpi_ev);
4179 break;
4180 case 6:
4181 /* 0x6000-0x6FFF: thermal alarms/notices and
4182 * keyboard events */
4183 known_ev = hotkey_notify_6xxx(hkey, &send_acpi_ev,
4184 &ignore_acpi_ev);
4185 break;
4186 case 7:
4187 /* 0x7000-0x7FFF: misc */
4188 if (tp_features.hotkey_wlsw &&
4189 hkey == TP_HKEY_EV_RFKILL_CHANGED) {
4190 tpacpi_send_radiosw_update();
4191 send_acpi_ev = 0;
4192 known_ev = true;
4193 break;
4194 }
4195 fallthrough; /* to default */
4196 default:
4197 known_ev = false;
4198 }
4199 if (!known_ev) {
4200 pr_notice("unhandled HKEY event 0x%04x\n", hkey);
4201 pr_notice("please report the conditions when this event happened to %s\n",
4202 TPACPI_MAIL);
4203 }
4204
4205 /* netlink events */
4206 if (!ignore_acpi_ev && send_acpi_ev) {
4207 acpi_bus_generate_netlink_event(
4208 ibm->acpi->device->pnp.device_class,
4209 dev_name(&ibm->acpi->device->dev),
4210 event, hkey);
4211 }
4212 }
4213 }
4214
4215 static void hotkey_suspend(void)
4216 {
4217 /* Do these on suspend, we get the events on early resume! */
4218 hotkey_wakeup_reason = TP_ACPI_WAKEUP_NONE;
4219 hotkey_autosleep_ack = 0;
4220
4221 /* save previous mode of adaptive keyboard of X1 Carbon */
4222 if (tp_features.has_adaptive_kbd) {
4223 if (!acpi_evalf(hkey_handle, &adaptive_keyboard_prev_mode,
4224 "GTRW", "dd", 0)) {
4225 pr_err("Cannot read adaptive keyboard mode.\n");
4226 }
4227 }
4228 }
4229
4230 static void hotkey_resume(void)
4231 {
4232 tpacpi_disable_brightness_delay();
4233
4234 if (hotkey_status_set(true) < 0 ||
4235 hotkey_mask_set(hotkey_acpi_mask) < 0)
4236 pr_err("error while attempting to reset the event firmware interface\n");
4237
4238 tpacpi_send_radiosw_update();
4239 tpacpi_input_send_tabletsw();
4240 hotkey_tablet_mode_notify_change();
4241 hotkey_wakeup_reason_notify_change();
4242 hotkey_wakeup_hotunplug_complete_notify_change();
4243 hotkey_poll_setup_safe(false);
4244
4245 /* restore previous mode of adapive keyboard of X1 Carbon */
4246 if (tp_features.has_adaptive_kbd) {
4247 if (!acpi_evalf(hkey_handle, NULL, "STRW", "vd",
4248 adaptive_keyboard_prev_mode)) {
4249 pr_err("Cannot set adaptive keyboard mode.\n");
4250 }
4251 }
4252 }
4253
4254 /* procfs -------------------------------------------------------------- */
4255 static int hotkey_read(struct seq_file *m)
4256 {
4257 int res, status;
4258
4259 if (!tp_features.hotkey) {
4260 seq_printf(m, "status:\t\tnot supported\n");
4261 return 0;
4262 }
4263
4264 if (mutex_lock_killable(&hotkey_mutex))
4265 return -ERESTARTSYS;
4266 res = hotkey_status_get(&status);
4267 if (!res)
4268 res = hotkey_mask_get();
4269 mutex_unlock(&hotkey_mutex);
4270 if (res)
4271 return res;
4272
4273 seq_printf(m, "status:\t\t%s\n", enabled(status, 0));
4274 if (hotkey_all_mask) {
4275 seq_printf(m, "mask:\t\t0x%08x\n", hotkey_user_mask);
4276 seq_printf(m, "commands:\tenable, disable, reset, <mask>\n");
4277 } else {
4278 seq_printf(m, "mask:\t\tnot supported\n");
4279 seq_printf(m, "commands:\tenable, disable, reset\n");
4280 }
4281
4282 return 0;
4283 }
4284
4285 static void hotkey_enabledisable_warn(bool enable)
4286 {
4287 tpacpi_log_usertask("procfs hotkey enable/disable");
4288 if (!WARN((tpacpi_lifecycle == TPACPI_LIFE_RUNNING || !enable),
4289 pr_fmt("hotkey enable/disable functionality has been removed from the driver. Hotkeys are always enabled.\n")))
4290 pr_err("Please remove the hotkey=enable module parameter, it is deprecated. Hotkeys are always enabled.\n");
4291 }
4292
4293 static int hotkey_write(char *buf)
4294 {
4295 int res;
4296 u32 mask;
4297 char *cmd;
4298
4299 if (!tp_features.hotkey)
4300 return -ENODEV;
4301
4302 if (mutex_lock_killable(&hotkey_mutex))
4303 return -ERESTARTSYS;
4304
4305 mask = hotkey_user_mask;
4306
4307 res = 0;
4308 while ((cmd = strsep(&buf, ","))) {
4309 if (strlencmp(cmd, "enable") == 0) {
4310 hotkey_enabledisable_warn(1);
4311 } else if (strlencmp(cmd, "disable") == 0) {
4312 hotkey_enabledisable_warn(0);
4313 res = -EPERM;
4314 } else if (strlencmp(cmd, "reset") == 0) {
4315 mask = (hotkey_all_mask | hotkey_source_mask)
4316 & ~hotkey_reserved_mask;
4317 } else if (sscanf(cmd, "0x%x", &mask) == 1) {
4318 /* mask set */
4319 } else if (sscanf(cmd, "%x", &mask) == 1) {
4320 /* mask set */
4321 } else {
4322 res = -EINVAL;
4323 goto errexit;
4324 }
4325 }
4326
4327 if (!res) {
4328 tpacpi_disclose_usertask("procfs hotkey",
4329 "set mask to 0x%08x\n", mask);
4330 res = hotkey_user_mask_set(mask);
4331 }
4332
4333 errexit:
4334 mutex_unlock(&hotkey_mutex);
4335 return res;
4336 }
4337
4338 static const struct acpi_device_id ibm_htk_device_ids[] = {
4339 {TPACPI_ACPI_IBM_HKEY_HID, 0},
4340 {TPACPI_ACPI_LENOVO_HKEY_HID, 0},
4341 {TPACPI_ACPI_LENOVO_HKEY_V2_HID, 0},
4342 {"", 0},
4343 };
4344
4345 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver = {
4346 .hid = ibm_htk_device_ids,
4347 .notify = hotkey_notify,
4348 .handle = &hkey_handle,
4349 .type = ACPI_DEVICE_NOTIFY,
4350 };
4351
4352 static struct ibm_struct hotkey_driver_data = {
4353 .name = "hotkey",
4354 .read = hotkey_read,
4355 .write = hotkey_write,
4356 .exit = hotkey_exit,
4357 .resume = hotkey_resume,
4358 .suspend = hotkey_suspend,
4359 .acpi = &ibm_hotkey_acpidriver,
4360 };
4361
4362 /*************************************************************************
4363 * Bluetooth subdriver
4364 */
4365
4366 enum {
4367 /* ACPI GBDC/SBDC bits */
4368 TP_ACPI_BLUETOOTH_HWPRESENT = 0x01, /* Bluetooth hw available */
4369 TP_ACPI_BLUETOOTH_RADIOSSW = 0x02, /* Bluetooth radio enabled */
4370 TP_ACPI_BLUETOOTH_RESUMECTRL = 0x04, /* Bluetooth state at resume:
4371 0 = disable, 1 = enable */
4372 };
4373
4374 enum {
4375 /* ACPI \BLTH commands */
4376 TP_ACPI_BLTH_GET_ULTRAPORT_ID = 0x00, /* Get Ultraport BT ID */
4377 TP_ACPI_BLTH_GET_PWR_ON_RESUME = 0x01, /* Get power-on-resume state */
4378 TP_ACPI_BLTH_PWR_ON_ON_RESUME = 0x02, /* Resume powered on */
4379 TP_ACPI_BLTH_PWR_OFF_ON_RESUME = 0x03, /* Resume powered off */
4380 TP_ACPI_BLTH_SAVE_STATE = 0x05, /* Save state for S4/S5 */
4381 };
4382
4383 #define TPACPI_RFK_BLUETOOTH_SW_NAME "tpacpi_bluetooth_sw"
4384
4385 static int bluetooth_get_status(void)
4386 {
4387 int status;
4388
4389 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4390 if (dbg_bluetoothemul)
4391 return (tpacpi_bluetooth_emulstate) ?
4392 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4393 #endif
4394
4395 if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
4396 return -EIO;
4397
4398 return ((status & TP_ACPI_BLUETOOTH_RADIOSSW) != 0) ?
4399 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4400 }
4401
4402 static int bluetooth_set_status(enum tpacpi_rfkill_state state)
4403 {
4404 int status;
4405
4406 vdbg_printk(TPACPI_DBG_RFKILL,
4407 "will attempt to %s bluetooth\n",
4408 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable");
4409
4410 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4411 if (dbg_bluetoothemul) {
4412 tpacpi_bluetooth_emulstate = (state == TPACPI_RFK_RADIO_ON);
4413 return 0;
4414 }
4415 #endif
4416
4417 if (state == TPACPI_RFK_RADIO_ON)
4418 status = TP_ACPI_BLUETOOTH_RADIOSSW
4419 | TP_ACPI_BLUETOOTH_RESUMECTRL;
4420 else
4421 status = 0;
4422
4423 if (!acpi_evalf(hkey_handle, NULL, "SBDC", "vd", status))
4424 return -EIO;
4425
4426 return 0;
4427 }
4428
4429 /* sysfs bluetooth enable ---------------------------------------------- */
4430 static ssize_t bluetooth_enable_show(struct device *dev,
4431 struct device_attribute *attr,
4432 char *buf)
4433 {
4434 return tpacpi_rfk_sysfs_enable_show(TPACPI_RFK_BLUETOOTH_SW_ID,
4435 attr, buf);
4436 }
4437
4438 static ssize_t bluetooth_enable_store(struct device *dev,
4439 struct device_attribute *attr,
4440 const char *buf, size_t count)
4441 {
4442 return tpacpi_rfk_sysfs_enable_store(TPACPI_RFK_BLUETOOTH_SW_ID,
4443 attr, buf, count);
4444 }
4445
4446 static DEVICE_ATTR_RW(bluetooth_enable);
4447
4448 /* --------------------------------------------------------------------- */
4449
4450 static struct attribute *bluetooth_attributes[] = {
4451 &dev_attr_bluetooth_enable.attr,
4452 NULL
4453 };
4454
4455 static const struct attribute_group bluetooth_attr_group = {
4456 .attrs = bluetooth_attributes,
4457 };
4458
4459 static const struct tpacpi_rfk_ops bluetooth_tprfk_ops = {
4460 .get_status = bluetooth_get_status,
4461 .set_status = bluetooth_set_status,
4462 };
4463
4464 static void bluetooth_shutdown(void)
4465 {
4466 /* Order firmware to save current state to NVRAM */
4467 if (!acpi_evalf(NULL, NULL, "\\BLTH", "vd",
4468 TP_ACPI_BLTH_SAVE_STATE))
4469 pr_notice("failed to save bluetooth state to NVRAM\n");
4470 else
4471 vdbg_printk(TPACPI_DBG_RFKILL,
4472 "bluetooth state saved to NVRAM\n");
4473 }
4474
4475 static void bluetooth_exit(void)
4476 {
4477 sysfs_remove_group(&tpacpi_pdev->dev.kobj,
4478 &bluetooth_attr_group);
4479
4480 tpacpi_destroy_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID);
4481
4482 bluetooth_shutdown();
4483 }
4484
4485 static const struct dmi_system_id bt_fwbug_list[] __initconst = {
4486 {
4487 .ident = "ThinkPad E485",
4488 .matches = {
4489 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
4490 DMI_MATCH(DMI_BOARD_NAME, "20KU"),
4491 },
4492 },
4493 {
4494 .ident = "ThinkPad E585",
4495 .matches = {
4496 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
4497 DMI_MATCH(DMI_BOARD_NAME, "20KV"),
4498 },
4499 },
4500 {
4501 .ident = "ThinkPad A285 - 20MW",
4502 .matches = {
4503 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
4504 DMI_MATCH(DMI_BOARD_NAME, "20MW"),
4505 },
4506 },
4507 {
4508 .ident = "ThinkPad A285 - 20MX",
4509 .matches = {
4510 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
4511 DMI_MATCH(DMI_BOARD_NAME, "20MX"),
4512 },
4513 },
4514 {
4515 .ident = "ThinkPad A485 - 20MU",
4516 .matches = {
4517 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
4518 DMI_MATCH(DMI_BOARD_NAME, "20MU"),
4519 },
4520 },
4521 {
4522 .ident = "ThinkPad A485 - 20MV",
4523 .matches = {
4524 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
4525 DMI_MATCH(DMI_BOARD_NAME, "20MV"),
4526 },
4527 },
4528 {}
4529 };
4530
4531 static const struct pci_device_id fwbug_cards_ids[] __initconst = {
4532 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x24F3) },
4533 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x24FD) },
4534 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x2526) },
4535 {}
4536 };
4537
4538
4539 static int __init have_bt_fwbug(void)
4540 {
4541 /*
4542 * Some AMD based ThinkPads have a firmware bug that calling
4543 * "GBDC" will cause bluetooth on Intel wireless cards blocked
4544 */
4545 if (dmi_check_system(bt_fwbug_list) && pci_dev_present(fwbug_cards_ids)) {
4546 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4547 FW_BUG "disable bluetooth subdriver for Intel cards\n");
4548 return 1;
4549 } else
4550 return 0;
4551 }
4552
4553 static int __init bluetooth_init(struct ibm_init_struct *iibm)
4554 {
4555 int res;
4556 int status = 0;
4557
4558 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4559 "initializing bluetooth subdriver\n");
4560
4561 TPACPI_ACPIHANDLE_INIT(hkey);
4562
4563 /* bluetooth not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
4564 G4x, R30, R31, R40e, R50e, T20-22, X20-21 */
4565 tp_features.bluetooth = !have_bt_fwbug() && hkey_handle &&
4566 acpi_evalf(hkey_handle, &status, "GBDC", "qd");
4567
4568 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4569 "bluetooth is %s, status 0x%02x\n",
4570 str_supported(tp_features.bluetooth),
4571 status);
4572
4573 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4574 if (dbg_bluetoothemul) {
4575 tp_features.bluetooth = 1;
4576 pr_info("bluetooth switch emulation enabled\n");
4577 } else
4578 #endif
4579 if (tp_features.bluetooth &&
4580 !(status & TP_ACPI_BLUETOOTH_HWPRESENT)) {
4581 /* no bluetooth hardware present in system */
4582 tp_features.bluetooth = 0;
4583 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4584 "bluetooth hardware not installed\n");
4585 }
4586
4587 if (!tp_features.bluetooth)
4588 return 1;
4589
4590 res = tpacpi_new_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID,
4591 &bluetooth_tprfk_ops,
4592 RFKILL_TYPE_BLUETOOTH,
4593 TPACPI_RFK_BLUETOOTH_SW_NAME,
4594 true);
4595 if (res)
4596 return res;
4597
4598 res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
4599 &bluetooth_attr_group);
4600 if (res) {
4601 tpacpi_destroy_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID);
4602 return res;
4603 }
4604
4605 return 0;
4606 }
4607
4608 /* procfs -------------------------------------------------------------- */
4609 static int bluetooth_read(struct seq_file *m)
4610 {
4611 return tpacpi_rfk_procfs_read(TPACPI_RFK_BLUETOOTH_SW_ID, m);
4612 }
4613
4614 static int bluetooth_write(char *buf)
4615 {
4616 return tpacpi_rfk_procfs_write(TPACPI_RFK_BLUETOOTH_SW_ID, buf);
4617 }
4618
4619 static struct ibm_struct bluetooth_driver_data = {
4620 .name = "bluetooth",
4621 .read = bluetooth_read,
4622 .write = bluetooth_write,
4623 .exit = bluetooth_exit,
4624 .shutdown = bluetooth_shutdown,
4625 };
4626
4627 /*************************************************************************
4628 * Wan subdriver
4629 */
4630
4631 enum {
4632 /* ACPI GWAN/SWAN bits */
4633 TP_ACPI_WANCARD_HWPRESENT = 0x01, /* Wan hw available */
4634 TP_ACPI_WANCARD_RADIOSSW = 0x02, /* Wan radio enabled */
4635 TP_ACPI_WANCARD_RESUMECTRL = 0x04, /* Wan state at resume:
4636 0 = disable, 1 = enable */
4637 };
4638
4639 #define TPACPI_RFK_WWAN_SW_NAME "tpacpi_wwan_sw"
4640
4641 static int wan_get_status(void)
4642 {
4643 int status;
4644
4645 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4646 if (dbg_wwanemul)
4647 return (tpacpi_wwan_emulstate) ?
4648 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4649 #endif
4650
4651 if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
4652 return -EIO;
4653
4654 return ((status & TP_ACPI_WANCARD_RADIOSSW) != 0) ?
4655 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4656 }
4657
4658 static int wan_set_status(enum tpacpi_rfkill_state state)
4659 {
4660 int status;
4661
4662 vdbg_printk(TPACPI_DBG_RFKILL,
4663 "will attempt to %s wwan\n",
4664 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable");
4665
4666 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4667 if (dbg_wwanemul) {
4668 tpacpi_wwan_emulstate = (state == TPACPI_RFK_RADIO_ON);
4669 return 0;
4670 }
4671 #endif
4672
4673 if (state == TPACPI_RFK_RADIO_ON)
4674 status = TP_ACPI_WANCARD_RADIOSSW
4675 | TP_ACPI_WANCARD_RESUMECTRL;
4676 else
4677 status = 0;
4678
4679 if (!acpi_evalf(hkey_handle, NULL, "SWAN", "vd", status))
4680 return -EIO;
4681
4682 return 0;
4683 }
4684
4685 /* sysfs wan enable ---------------------------------------------------- */
4686 static ssize_t wan_enable_show(struct device *dev,
4687 struct device_attribute *attr,
4688 char *buf)
4689 {
4690 return tpacpi_rfk_sysfs_enable_show(TPACPI_RFK_WWAN_SW_ID,
4691 attr, buf);
4692 }
4693
4694 static ssize_t wan_enable_store(struct device *dev,
4695 struct device_attribute *attr,
4696 const char *buf, size_t count)
4697 {
4698 return tpacpi_rfk_sysfs_enable_store(TPACPI_RFK_WWAN_SW_ID,
4699 attr, buf, count);
4700 }
4701
4702 static DEVICE_ATTR(wwan_enable, S_IWUSR | S_IRUGO,
4703 wan_enable_show, wan_enable_store);
4704
4705 /* --------------------------------------------------------------------- */
4706
4707 static struct attribute *wan_attributes[] = {
4708 &dev_attr_wwan_enable.attr,
4709 NULL
4710 };
4711
4712 static const struct attribute_group wan_attr_group = {
4713 .attrs = wan_attributes,
4714 };
4715
4716 static const struct tpacpi_rfk_ops wan_tprfk_ops = {
4717 .get_status = wan_get_status,
4718 .set_status = wan_set_status,
4719 };
4720
4721 static void wan_shutdown(void)
4722 {
4723 /* Order firmware to save current state to NVRAM */
4724 if (!acpi_evalf(NULL, NULL, "\\WGSV", "vd",
4725 TP_ACPI_WGSV_SAVE_STATE))
4726 pr_notice("failed to save WWAN state to NVRAM\n");
4727 else
4728 vdbg_printk(TPACPI_DBG_RFKILL,
4729 "WWAN state saved to NVRAM\n");
4730 }
4731
4732 static void wan_exit(void)
4733 {
4734 sysfs_remove_group(&tpacpi_pdev->dev.kobj,
4735 &wan_attr_group);
4736
4737 tpacpi_destroy_rfkill(TPACPI_RFK_WWAN_SW_ID);
4738
4739 wan_shutdown();
4740 }
4741
4742 static int __init wan_init(struct ibm_init_struct *iibm)
4743 {
4744 int res;
4745 int status = 0;
4746
4747 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4748 "initializing wan subdriver\n");
4749
4750 TPACPI_ACPIHANDLE_INIT(hkey);
4751
4752 tp_features.wan = hkey_handle &&
4753 acpi_evalf(hkey_handle, &status, "GWAN", "qd");
4754
4755 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4756 "wan is %s, status 0x%02x\n",
4757 str_supported(tp_features.wan),
4758 status);
4759
4760 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4761 if (dbg_wwanemul) {
4762 tp_features.wan = 1;
4763 pr_info("wwan switch emulation enabled\n");
4764 } else
4765 #endif
4766 if (tp_features.wan &&
4767 !(status & TP_ACPI_WANCARD_HWPRESENT)) {
4768 /* no wan hardware present in system */
4769 tp_features.wan = 0;
4770 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4771 "wan hardware not installed\n");
4772 }
4773
4774 if (!tp_features.wan)
4775 return 1;
4776
4777 res = tpacpi_new_rfkill(TPACPI_RFK_WWAN_SW_ID,
4778 &wan_tprfk_ops,
4779 RFKILL_TYPE_WWAN,
4780 TPACPI_RFK_WWAN_SW_NAME,
4781 true);
4782 if (res)
4783 return res;
4784
4785 res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
4786 &wan_attr_group);
4787
4788 if (res) {
4789 tpacpi_destroy_rfkill(TPACPI_RFK_WWAN_SW_ID);
4790 return res;
4791 }
4792
4793 return 0;
4794 }
4795
4796 /* procfs -------------------------------------------------------------- */
4797 static int wan_read(struct seq_file *m)
4798 {
4799 return tpacpi_rfk_procfs_read(TPACPI_RFK_WWAN_SW_ID, m);
4800 }
4801
4802 static int wan_write(char *buf)
4803 {
4804 return tpacpi_rfk_procfs_write(TPACPI_RFK_WWAN_SW_ID, buf);
4805 }
4806
4807 static struct ibm_struct wan_driver_data = {
4808 .name = "wan",
4809 .read = wan_read,
4810 .write = wan_write,
4811 .exit = wan_exit,
4812 .shutdown = wan_shutdown,
4813 };
4814
4815 /*************************************************************************
4816 * UWB subdriver
4817 */
4818
4819 enum {
4820 /* ACPI GUWB/SUWB bits */
4821 TP_ACPI_UWB_HWPRESENT = 0x01, /* UWB hw available */
4822 TP_ACPI_UWB_RADIOSSW = 0x02, /* UWB radio enabled */
4823 };
4824
4825 #define TPACPI_RFK_UWB_SW_NAME "tpacpi_uwb_sw"
4826
4827 static int uwb_get_status(void)
4828 {
4829 int status;
4830
4831 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4832 if (dbg_uwbemul)
4833 return (tpacpi_uwb_emulstate) ?
4834 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4835 #endif
4836
4837 if (!acpi_evalf(hkey_handle, &status, "GUWB", "d"))
4838 return -EIO;
4839
4840 return ((status & TP_ACPI_UWB_RADIOSSW) != 0) ?
4841 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4842 }
4843
4844 static int uwb_set_status(enum tpacpi_rfkill_state state)
4845 {
4846 int status;
4847
4848 vdbg_printk(TPACPI_DBG_RFKILL,
4849 "will attempt to %s UWB\n",
4850 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable");
4851
4852 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4853 if (dbg_uwbemul) {
4854 tpacpi_uwb_emulstate = (state == TPACPI_RFK_RADIO_ON);
4855 return 0;
4856 }
4857 #endif
4858
4859 if (state == TPACPI_RFK_RADIO_ON)
4860 status = TP_ACPI_UWB_RADIOSSW;
4861 else
4862 status = 0;
4863
4864 if (!acpi_evalf(hkey_handle, NULL, "SUWB", "vd", status))
4865 return -EIO;
4866
4867 return 0;
4868 }
4869
4870 /* --------------------------------------------------------------------- */
4871
4872 static const struct tpacpi_rfk_ops uwb_tprfk_ops = {
4873 .get_status = uwb_get_status,
4874 .set_status = uwb_set_status,
4875 };
4876
4877 static void uwb_exit(void)
4878 {
4879 tpacpi_destroy_rfkill(TPACPI_RFK_UWB_SW_ID);
4880 }
4881
4882 static int __init uwb_init(struct ibm_init_struct *iibm)
4883 {
4884 int res;
4885 int status = 0;
4886
4887 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4888 "initializing uwb subdriver\n");
4889
4890 TPACPI_ACPIHANDLE_INIT(hkey);
4891
4892 tp_features.uwb = hkey_handle &&
4893 acpi_evalf(hkey_handle, &status, "GUWB", "qd");
4894
4895 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4896 "uwb is %s, status 0x%02x\n",
4897 str_supported(tp_features.uwb),
4898 status);
4899
4900 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4901 if (dbg_uwbemul) {
4902 tp_features.uwb = 1;
4903 pr_info("uwb switch emulation enabled\n");
4904 } else
4905 #endif
4906 if (tp_features.uwb &&
4907 !(status & TP_ACPI_UWB_HWPRESENT)) {
4908 /* no uwb hardware present in system */
4909 tp_features.uwb = 0;
4910 dbg_printk(TPACPI_DBG_INIT,
4911 "uwb hardware not installed\n");
4912 }
4913
4914 if (!tp_features.uwb)
4915 return 1;
4916
4917 res = tpacpi_new_rfkill(TPACPI_RFK_UWB_SW_ID,
4918 &uwb_tprfk_ops,
4919 RFKILL_TYPE_UWB,
4920 TPACPI_RFK_UWB_SW_NAME,
4921 false);
4922 return res;
4923 }
4924
4925 static struct ibm_struct uwb_driver_data = {
4926 .name = "uwb",
4927 .exit = uwb_exit,
4928 .flags.experimental = 1,
4929 };
4930
4931 /*************************************************************************
4932 * Video subdriver
4933 */
4934
4935 #ifdef CONFIG_THINKPAD_ACPI_VIDEO
4936
4937 enum video_access_mode {
4938 TPACPI_VIDEO_NONE = 0,
4939 TPACPI_VIDEO_570, /* 570 */
4940 TPACPI_VIDEO_770, /* 600e/x, 770e, 770x */
4941 TPACPI_VIDEO_NEW, /* all others */
4942 };
4943
4944 enum { /* video status flags, based on VIDEO_570 */
4945 TP_ACPI_VIDEO_S_LCD = 0x01, /* LCD output enabled */
4946 TP_ACPI_VIDEO_S_CRT = 0x02, /* CRT output enabled */
4947 TP_ACPI_VIDEO_S_DVI = 0x08, /* DVI output enabled */
4948 };
4949
4950 enum { /* TPACPI_VIDEO_570 constants */
4951 TP_ACPI_VIDEO_570_PHSCMD = 0x87, /* unknown magic constant :( */
4952 TP_ACPI_VIDEO_570_PHSMASK = 0x03, /* PHS bits that map to
4953 * video_status_flags */
4954 TP_ACPI_VIDEO_570_PHS2CMD = 0x8b, /* unknown magic constant :( */
4955 TP_ACPI_VIDEO_570_PHS2SET = 0x80, /* unknown magic constant :( */
4956 };
4957
4958 static enum video_access_mode video_supported;
4959 static int video_orig_autosw;
4960
4961 static int video_autosw_get(void);
4962 static int video_autosw_set(int enable);
4963
4964 TPACPI_HANDLE(vid, root,
4965 "\\_SB.PCI.AGP.VGA", /* 570 */
4966 "\\_SB.PCI0.AGP0.VID0", /* 600e/x, 770x */
4967 "\\_SB.PCI0.VID0", /* 770e */
4968 "\\_SB.PCI0.VID", /* A21e, G4x, R50e, X30, X40 */
4969 "\\_SB.PCI0.AGP.VGA", /* X100e and a few others */
4970 "\\_SB.PCI0.AGP.VID", /* all others */
4971 ); /* R30, R31 */
4972
4973 TPACPI_HANDLE(vid2, root, "\\_SB.PCI0.AGPB.VID"); /* G41 */
4974
4975 static int __init video_init(struct ibm_init_struct *iibm)
4976 {
4977 int ivga;
4978
4979 vdbg_printk(TPACPI_DBG_INIT, "initializing video subdriver\n");
4980
4981 TPACPI_ACPIHANDLE_INIT(vid);
4982 if (tpacpi_is_ibm())
4983 TPACPI_ACPIHANDLE_INIT(vid2);
4984
4985 if (vid2_handle && acpi_evalf(NULL, &ivga, "\\IVGA", "d") && ivga)
4986 /* G41, assume IVGA doesn't change */
4987 vid_handle = vid2_handle;
4988
4989 if (!vid_handle)
4990 /* video switching not supported on R30, R31 */
4991 video_supported = TPACPI_VIDEO_NONE;
4992 else if (tpacpi_is_ibm() &&
4993 acpi_evalf(vid_handle, &video_orig_autosw, "SWIT", "qd"))
4994 /* 570 */
4995 video_supported = TPACPI_VIDEO_570;
4996 else if (tpacpi_is_ibm() &&
4997 acpi_evalf(vid_handle, &video_orig_autosw, "^VADL", "qd"))
4998 /* 600e/x, 770e, 770x */
4999 video_supported = TPACPI_VIDEO_770;
5000 else
5001 /* all others */
5002 video_supported = TPACPI_VIDEO_NEW;
5003
5004 vdbg_printk(TPACPI_DBG_INIT, "video is %s, mode %d\n",
5005 str_supported(video_supported != TPACPI_VIDEO_NONE),
5006 video_supported);
5007
5008 return (video_supported != TPACPI_VIDEO_NONE) ? 0 : 1;
5009 }
5010
5011 static void video_exit(void)
5012 {
5013 dbg_printk(TPACPI_DBG_EXIT,
5014 "restoring original video autoswitch mode\n");
5015 if (video_autosw_set(video_orig_autosw))
5016 pr_err("error while trying to restore original video autoswitch mode\n");
5017 }
5018
5019 static int video_outputsw_get(void)
5020 {
5021 int status = 0;
5022 int i;
5023
5024 switch (video_supported) {
5025 case TPACPI_VIDEO_570:
5026 if (!acpi_evalf(NULL, &i, "\\_SB.PHS", "dd",
5027 TP_ACPI_VIDEO_570_PHSCMD))
5028 return -EIO;
5029 status = i & TP_ACPI_VIDEO_570_PHSMASK;
5030 break;
5031 case TPACPI_VIDEO_770:
5032 if (!acpi_evalf(NULL, &i, "\\VCDL", "d"))
5033 return -EIO;
5034 if (i)
5035 status |= TP_ACPI_VIDEO_S_LCD;
5036 if (!acpi_evalf(NULL, &i, "\\VCDC", "d"))
5037 return -EIO;
5038 if (i)
5039 status |= TP_ACPI_VIDEO_S_CRT;
5040 break;
5041 case TPACPI_VIDEO_NEW:
5042 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 1) ||
5043 !acpi_evalf(NULL, &i, "\\VCDC", "d"))
5044 return -EIO;
5045 if (i)
5046 status |= TP_ACPI_VIDEO_S_CRT;
5047
5048 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0) ||
5049 !acpi_evalf(NULL, &i, "\\VCDL", "d"))
5050 return -EIO;
5051 if (i)
5052 status |= TP_ACPI_VIDEO_S_LCD;
5053 if (!acpi_evalf(NULL, &i, "\\VCDD", "d"))
5054 return -EIO;
5055 if (i)
5056 status |= TP_ACPI_VIDEO_S_DVI;
5057 break;
5058 default:
5059 return -ENOSYS;
5060 }
5061
5062 return status;
5063 }
5064
5065 static int video_outputsw_set(int status)
5066 {
5067 int autosw;
5068 int res = 0;
5069
5070 switch (video_supported) {
5071 case TPACPI_VIDEO_570:
5072 res = acpi_evalf(NULL, NULL,
5073 "\\_SB.PHS2", "vdd",
5074 TP_ACPI_VIDEO_570_PHS2CMD,
5075 status | TP_ACPI_VIDEO_570_PHS2SET);
5076 break;
5077 case TPACPI_VIDEO_770:
5078 autosw = video_autosw_get();
5079 if (autosw < 0)
5080 return autosw;
5081
5082 res = video_autosw_set(1);
5083 if (res)
5084 return res;
5085 res = acpi_evalf(vid_handle, NULL,
5086 "ASWT", "vdd", status * 0x100, 0);
5087 if (!autosw && video_autosw_set(autosw)) {
5088 pr_err("video auto-switch left enabled due to error\n");
5089 return -EIO;
5090 }
5091 break;
5092 case TPACPI_VIDEO_NEW:
5093 res = acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0x80) &&
5094 acpi_evalf(NULL, NULL, "\\VSDS", "vdd", status, 1);
5095 break;
5096 default:
5097 return -ENOSYS;
5098 }
5099
5100 return (res) ? 0 : -EIO;
5101 }
5102
5103 static int video_autosw_get(void)
5104 {
5105 int autosw = 0;
5106
5107 switch (video_supported) {
5108 case TPACPI_VIDEO_570:
5109 if (!acpi_evalf(vid_handle, &autosw, "SWIT", "d"))
5110 return -EIO;
5111 break;
5112 case TPACPI_VIDEO_770:
5113 case TPACPI_VIDEO_NEW:
5114 if (!acpi_evalf(vid_handle, &autosw, "^VDEE", "d"))
5115 return -EIO;
5116 break;
5117 default:
5118 return -ENOSYS;
5119 }
5120
5121 return autosw & 1;
5122 }
5123
5124 static int video_autosw_set(int enable)
5125 {
5126 if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", (enable) ? 1 : 0))
5127 return -EIO;
5128 return 0;
5129 }
5130
5131 static int video_outputsw_cycle(void)
5132 {
5133 int autosw = video_autosw_get();
5134 int res;
5135
5136 if (autosw < 0)
5137 return autosw;
5138
5139 switch (video_supported) {
5140 case TPACPI_VIDEO_570:
5141 res = video_autosw_set(1);
5142 if (res)
5143 return res;
5144 res = acpi_evalf(ec_handle, NULL, "_Q16", "v");
5145 break;
5146 case TPACPI_VIDEO_770:
5147 case TPACPI_VIDEO_NEW:
5148 res = video_autosw_set(1);
5149 if (res)
5150 return res;
5151 res = acpi_evalf(vid_handle, NULL, "VSWT", "v");
5152 break;
5153 default:
5154 return -ENOSYS;
5155 }
5156 if (!autosw && video_autosw_set(autosw)) {
5157 pr_err("video auto-switch left enabled due to error\n");
5158 return -EIO;
5159 }
5160
5161 return (res) ? 0 : -EIO;
5162 }
5163
5164 static int video_expand_toggle(void)
5165 {
5166 switch (video_supported) {
5167 case TPACPI_VIDEO_570:
5168 return acpi_evalf(ec_handle, NULL, "_Q17", "v") ?
5169 0 : -EIO;
5170 case TPACPI_VIDEO_770:
5171 return acpi_evalf(vid_handle, NULL, "VEXP", "v") ?
5172 0 : -EIO;
5173 case TPACPI_VIDEO_NEW:
5174 return acpi_evalf(NULL, NULL, "\\VEXP", "v") ?
5175 0 : -EIO;
5176 default:
5177 return -ENOSYS;
5178 }
5179 /* not reached */
5180 }
5181
5182 static int video_read(struct seq_file *m)
5183 {
5184 int status, autosw;
5185
5186 if (video_supported == TPACPI_VIDEO_NONE) {
5187 seq_printf(m, "status:\t\tnot supported\n");
5188 return 0;
5189 }
5190
5191 /* Even reads can crash X.org, so... */
5192 if (!capable(CAP_SYS_ADMIN))
5193 return -EPERM;
5194
5195 status = video_outputsw_get();
5196 if (status < 0)
5197 return status;
5198
5199 autosw = video_autosw_get();
5200 if (autosw < 0)
5201 return autosw;
5202
5203 seq_printf(m, "status:\t\tsupported\n");
5204 seq_printf(m, "lcd:\t\t%s\n", enabled(status, 0));
5205 seq_printf(m, "crt:\t\t%s\n", enabled(status, 1));
5206 if (video_supported == TPACPI_VIDEO_NEW)
5207 seq_printf(m, "dvi:\t\t%s\n", enabled(status, 3));
5208 seq_printf(m, "auto:\t\t%s\n", enabled(autosw, 0));
5209 seq_printf(m, "commands:\tlcd_enable, lcd_disable\n");
5210 seq_printf(m, "commands:\tcrt_enable, crt_disable\n");
5211 if (video_supported == TPACPI_VIDEO_NEW)
5212 seq_printf(m, "commands:\tdvi_enable, dvi_disable\n");
5213 seq_printf(m, "commands:\tauto_enable, auto_disable\n");
5214 seq_printf(m, "commands:\tvideo_switch, expand_toggle\n");
5215
5216 return 0;
5217 }
5218
5219 static int video_write(char *buf)
5220 {
5221 char *cmd;
5222 int enable, disable, status;
5223 int res;
5224
5225 if (video_supported == TPACPI_VIDEO_NONE)
5226 return -ENODEV;
5227
5228 /* Even reads can crash X.org, let alone writes... */
5229 if (!capable(CAP_SYS_ADMIN))
5230 return -EPERM;
5231
5232 enable = 0;
5233 disable = 0;
5234
5235 while ((cmd = strsep(&buf, ","))) {
5236 if (strlencmp(cmd, "lcd_enable") == 0) {
5237 enable |= TP_ACPI_VIDEO_S_LCD;
5238 } else if (strlencmp(cmd, "lcd_disable") == 0) {
5239 disable |= TP_ACPI_VIDEO_S_LCD;
5240 } else if (strlencmp(cmd, "crt_enable") == 0) {
5241 enable |= TP_ACPI_VIDEO_S_CRT;
5242 } else if (strlencmp(cmd, "crt_disable") == 0) {
5243 disable |= TP_ACPI_VIDEO_S_CRT;
5244 } else if (video_supported == TPACPI_VIDEO_NEW &&
5245 strlencmp(cmd, "dvi_enable") == 0) {
5246 enable |= TP_ACPI_VIDEO_S_DVI;
5247 } else if (video_supported == TPACPI_VIDEO_NEW &&
5248 strlencmp(cmd, "dvi_disable") == 0) {
5249 disable |= TP_ACPI_VIDEO_S_DVI;
5250 } else if (strlencmp(cmd, "auto_enable") == 0) {
5251 res = video_autosw_set(1);
5252 if (res)
5253 return res;
5254 } else if (strlencmp(cmd, "auto_disable") == 0) {
5255 res = video_autosw_set(0);
5256 if (res)
5257 return res;
5258 } else if (strlencmp(cmd, "video_switch") == 0) {
5259 res = video_outputsw_cycle();
5260 if (res)
5261 return res;
5262 } else if (strlencmp(cmd, "expand_toggle") == 0) {
5263 res = video_expand_toggle();
5264 if (res)
5265 return res;
5266 } else
5267 return -EINVAL;
5268 }
5269
5270 if (enable || disable) {
5271 status = video_outputsw_get();
5272 if (status < 0)
5273 return status;
5274 res = video_outputsw_set((status & ~disable) | enable);
5275 if (res)
5276 return res;
5277 }
5278
5279 return 0;
5280 }
5281
5282 static struct ibm_struct video_driver_data = {
5283 .name = "video",
5284 .read = video_read,
5285 .write = video_write,
5286 .exit = video_exit,
5287 };
5288
5289 #endif /* CONFIG_THINKPAD_ACPI_VIDEO */
5290
5291 /*************************************************************************
5292 * Keyboard backlight subdriver
5293 */
5294
5295 static enum led_brightness kbdlight_brightness;
5296 static DEFINE_MUTEX(kbdlight_mutex);
5297
5298 static int kbdlight_set_level(int level)
5299 {
5300 int ret = 0;
5301
5302 if (!hkey_handle)
5303 return -ENXIO;
5304
5305 mutex_lock(&kbdlight_mutex);
5306
5307 if (!acpi_evalf(hkey_handle, NULL, "MLCS", "dd", level))
5308 ret = -EIO;
5309 else
5310 kbdlight_brightness = level;
5311
5312 mutex_unlock(&kbdlight_mutex);
5313
5314 return ret;
5315 }
5316
5317 static int kbdlight_get_level(void)
5318 {
5319 int status = 0;
5320
5321 if (!hkey_handle)
5322 return -ENXIO;
5323
5324 if (!acpi_evalf(hkey_handle, &status, "MLCG", "dd", 0))
5325 return -EIO;
5326
5327 if (status < 0)
5328 return status;
5329
5330 return status & 0x3;
5331 }
5332
5333 static bool kbdlight_is_supported(void)
5334 {
5335 int status = 0;
5336
5337 if (!hkey_handle)
5338 return false;
5339
5340 if (!acpi_has_method(hkey_handle, "MLCG")) {
5341 vdbg_printk(TPACPI_DBG_INIT, "kbdlight MLCG is unavailable\n");
5342 return false;
5343 }
5344
5345 if (!acpi_evalf(hkey_handle, &status, "MLCG", "qdd", 0)) {
5346 vdbg_printk(TPACPI_DBG_INIT, "kbdlight MLCG failed\n");
5347 return false;
5348 }
5349
5350 if (status < 0) {
5351 vdbg_printk(TPACPI_DBG_INIT, "kbdlight MLCG err: %d\n", status);
5352 return false;
5353 }
5354
5355 vdbg_printk(TPACPI_DBG_INIT, "kbdlight MLCG returned 0x%x\n", status);
5356 /*
5357 * Guessed test for keyboard backlight:
5358 *
5359 * Machines with backlight keyboard return:
5360 * b010100000010000000XX - ThinkPad X1 Carbon 3rd
5361 * b110100010010000000XX - ThinkPad x230
5362 * b010100000010000000XX - ThinkPad x240
5363 * b010100000010000000XX - ThinkPad W541
5364 * (XX is current backlight level)
5365 *
5366 * Machines without backlight keyboard return:
5367 * b10100001000000000000 - ThinkPad x230
5368 * b10110001000000000000 - ThinkPad E430
5369 * b00000000000000000000 - ThinkPad E450
5370 *
5371 * Candidate BITs for detection test (XOR):
5372 * b01000000001000000000
5373 * ^
5374 */
5375 return status & BIT(9);
5376 }
5377
5378 static int kbdlight_sysfs_set(struct led_classdev *led_cdev,
5379 enum led_brightness brightness)
5380 {
5381 return kbdlight_set_level(brightness);
5382 }
5383
5384 static enum led_brightness kbdlight_sysfs_get(struct led_classdev *led_cdev)
5385 {
5386 int level;
5387
5388 level = kbdlight_get_level();
5389 if (level < 0)
5390 return 0;
5391
5392 return level;
5393 }
5394
5395 static struct tpacpi_led_classdev tpacpi_led_kbdlight = {
5396 .led_classdev = {
5397 .name = "tpacpi::kbd_backlight",
5398 .max_brightness = 2,
5399 .flags = LED_BRIGHT_HW_CHANGED,
5400 .brightness_set_blocking = &kbdlight_sysfs_set,
5401 .brightness_get = &kbdlight_sysfs_get,
5402 }
5403 };
5404
5405 static int __init kbdlight_init(struct ibm_init_struct *iibm)
5406 {
5407 int rc;
5408
5409 vdbg_printk(TPACPI_DBG_INIT, "initializing kbdlight subdriver\n");
5410
5411 TPACPI_ACPIHANDLE_INIT(hkey);
5412
5413 if (!kbdlight_is_supported()) {
5414 tp_features.kbdlight = 0;
5415 vdbg_printk(TPACPI_DBG_INIT, "kbdlight is unsupported\n");
5416 return 1;
5417 }
5418
5419 kbdlight_brightness = kbdlight_sysfs_get(NULL);
5420 tp_features.kbdlight = 1;
5421
5422 rc = led_classdev_register(&tpacpi_pdev->dev,
5423 &tpacpi_led_kbdlight.led_classdev);
5424 if (rc < 0) {
5425 tp_features.kbdlight = 0;
5426 return rc;
5427 }
5428
5429 tpacpi_hotkey_driver_mask_set(hotkey_driver_mask |
5430 TP_ACPI_HKEY_KBD_LIGHT_MASK);
5431 return 0;
5432 }
5433
5434 static void kbdlight_exit(void)
5435 {
5436 led_classdev_unregister(&tpacpi_led_kbdlight.led_classdev);
5437 }
5438
5439 static int kbdlight_set_level_and_update(int level)
5440 {
5441 int ret;
5442 struct led_classdev *led_cdev;
5443
5444 ret = kbdlight_set_level(level);
5445 led_cdev = &tpacpi_led_kbdlight.led_classdev;
5446
5447 if (ret == 0 && !(led_cdev->flags & LED_SUSPENDED))
5448 led_cdev->brightness = level;
5449
5450 return ret;
5451 }
5452
5453 static int kbdlight_read(struct seq_file *m)
5454 {
5455 int level;
5456
5457 if (!tp_features.kbdlight) {
5458 seq_printf(m, "status:\t\tnot supported\n");
5459 } else {
5460 level = kbdlight_get_level();
5461 if (level < 0)
5462 seq_printf(m, "status:\t\terror %d\n", level);
5463 else
5464 seq_printf(m, "status:\t\t%d\n", level);
5465 seq_printf(m, "commands:\t0, 1, 2\n");
5466 }
5467
5468 return 0;
5469 }
5470
5471 static int kbdlight_write(char *buf)
5472 {
5473 char *cmd;
5474 int res, level = -EINVAL;
5475
5476 if (!tp_features.kbdlight)
5477 return -ENODEV;
5478
5479 while ((cmd = strsep(&buf, ","))) {
5480 res = kstrtoint(cmd, 10, &level);
5481 if (res < 0)
5482 return res;
5483 }
5484
5485 if (level >= 3 || level < 0)
5486 return -EINVAL;
5487
5488 return kbdlight_set_level_and_update(level);
5489 }
5490
5491 static void kbdlight_suspend(void)
5492 {
5493 struct led_classdev *led_cdev;
5494
5495 if (!tp_features.kbdlight)
5496 return;
5497
5498 led_cdev = &tpacpi_led_kbdlight.led_classdev;
5499 led_update_brightness(led_cdev);
5500 led_classdev_suspend(led_cdev);
5501 }
5502
5503 static void kbdlight_resume(void)
5504 {
5505 if (!tp_features.kbdlight)
5506 return;
5507
5508 led_classdev_resume(&tpacpi_led_kbdlight.led_classdev);
5509 }
5510
5511 static struct ibm_struct kbdlight_driver_data = {
5512 .name = "kbdlight",
5513 .read = kbdlight_read,
5514 .write = kbdlight_write,
5515 .suspend = kbdlight_suspend,
5516 .resume = kbdlight_resume,
5517 .exit = kbdlight_exit,
5518 };
5519
5520 /*************************************************************************
5521 * Light (thinklight) subdriver
5522 */
5523
5524 TPACPI_HANDLE(lght, root, "\\LGHT"); /* A21e, A2xm/p, T20-22, X20-21 */
5525 TPACPI_HANDLE(ledb, ec, "LEDB"); /* G4x */
5526
5527 static int light_get_status(void)
5528 {
5529 int status = 0;
5530
5531 if (tp_features.light_status) {
5532 if (!acpi_evalf(ec_handle, &status, "KBLT", "d"))
5533 return -EIO;
5534 return (!!status);
5535 }
5536
5537 return -ENXIO;
5538 }
5539
5540 static int light_set_status(int status)
5541 {
5542 int rc;
5543
5544 if (tp_features.light) {
5545 if (cmos_handle) {
5546 rc = acpi_evalf(cmos_handle, NULL, NULL, "vd",
5547 (status) ?
5548 TP_CMOS_THINKLIGHT_ON :
5549 TP_CMOS_THINKLIGHT_OFF);
5550 } else {
5551 rc = acpi_evalf(lght_handle, NULL, NULL, "vd",
5552 (status) ? 1 : 0);
5553 }
5554 return (rc) ? 0 : -EIO;
5555 }
5556
5557 return -ENXIO;
5558 }
5559
5560 static int light_sysfs_set(struct led_classdev *led_cdev,
5561 enum led_brightness brightness)
5562 {
5563 return light_set_status((brightness != LED_OFF) ?
5564 TPACPI_LED_ON : TPACPI_LED_OFF);
5565 }
5566
5567 static enum led_brightness light_sysfs_get(struct led_classdev *led_cdev)
5568 {
5569 return (light_get_status() == 1) ? LED_FULL : LED_OFF;
5570 }
5571
5572 static struct tpacpi_led_classdev tpacpi_led_thinklight = {
5573 .led_classdev = {
5574 .name = "tpacpi::thinklight",
5575 .brightness_set_blocking = &light_sysfs_set,
5576 .brightness_get = &light_sysfs_get,
5577 }
5578 };
5579
5580 static int __init light_init(struct ibm_init_struct *iibm)
5581 {
5582 int rc;
5583
5584 vdbg_printk(TPACPI_DBG_INIT, "initializing light subdriver\n");
5585
5586 if (tpacpi_is_ibm()) {
5587 TPACPI_ACPIHANDLE_INIT(ledb);
5588 TPACPI_ACPIHANDLE_INIT(lght);
5589 }
5590 TPACPI_ACPIHANDLE_INIT(cmos);
5591
5592 /* light not supported on 570, 600e/x, 770e, 770x, G4x, R30, R31 */
5593 tp_features.light = (cmos_handle || lght_handle) && !ledb_handle;
5594
5595 if (tp_features.light)
5596 /* light status not supported on
5597 570, 600e/x, 770e, 770x, G4x, R30, R31, R32, X20 */
5598 tp_features.light_status =
5599 acpi_evalf(ec_handle, NULL, "KBLT", "qv");
5600
5601 vdbg_printk(TPACPI_DBG_INIT, "light is %s, light status is %s\n",
5602 str_supported(tp_features.light),
5603 str_supported(tp_features.light_status));
5604
5605 if (!tp_features.light)
5606 return 1;
5607
5608 rc = led_classdev_register(&tpacpi_pdev->dev,
5609 &tpacpi_led_thinklight.led_classdev);
5610
5611 if (rc < 0) {
5612 tp_features.light = 0;
5613 tp_features.light_status = 0;
5614 } else {
5615 rc = 0;
5616 }
5617
5618 return rc;
5619 }
5620
5621 static void light_exit(void)
5622 {
5623 led_classdev_unregister(&tpacpi_led_thinklight.led_classdev);
5624 }
5625
5626 static int light_read(struct seq_file *m)
5627 {
5628 int status;
5629
5630 if (!tp_features.light) {
5631 seq_printf(m, "status:\t\tnot supported\n");
5632 } else if (!tp_features.light_status) {
5633 seq_printf(m, "status:\t\tunknown\n");
5634 seq_printf(m, "commands:\ton, off\n");
5635 } else {
5636 status = light_get_status();
5637 if (status < 0)
5638 return status;
5639 seq_printf(m, "status:\t\t%s\n", onoff(status, 0));
5640 seq_printf(m, "commands:\ton, off\n");
5641 }
5642
5643 return 0;
5644 }
5645
5646 static int light_write(char *buf)
5647 {
5648 char *cmd;
5649 int newstatus = 0;
5650
5651 if (!tp_features.light)
5652 return -ENODEV;
5653
5654 while ((cmd = strsep(&buf, ","))) {
5655 if (strlencmp(cmd, "on") == 0) {
5656 newstatus = 1;
5657 } else if (strlencmp(cmd, "off") == 0) {
5658 newstatus = 0;
5659 } else
5660 return -EINVAL;
5661 }
5662
5663 return light_set_status(newstatus);
5664 }
5665
5666 static struct ibm_struct light_driver_data = {
5667 .name = "light",
5668 .read = light_read,
5669 .write = light_write,
5670 .exit = light_exit,
5671 };
5672
5673 /*************************************************************************
5674 * CMOS subdriver
5675 */
5676
5677 /* sysfs cmos_command -------------------------------------------------- */
5678 static ssize_t cmos_command_store(struct device *dev,
5679 struct device_attribute *attr,
5680 const char *buf, size_t count)
5681 {
5682 unsigned long cmos_cmd;
5683 int res;
5684
5685 if (parse_strtoul(buf, 21, &cmos_cmd))
5686 return -EINVAL;
5687
5688 res = issue_thinkpad_cmos_command(cmos_cmd);
5689 return (res) ? res : count;
5690 }
5691
5692 static DEVICE_ATTR_WO(cmos_command);
5693
5694 /* --------------------------------------------------------------------- */
5695
5696 static int __init cmos_init(struct ibm_init_struct *iibm)
5697 {
5698 int res;
5699
5700 vdbg_printk(TPACPI_DBG_INIT,
5701 "initializing cmos commands subdriver\n");
5702
5703 TPACPI_ACPIHANDLE_INIT(cmos);
5704
5705 vdbg_printk(TPACPI_DBG_INIT, "cmos commands are %s\n",
5706 str_supported(cmos_handle != NULL));
5707
5708 res = device_create_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
5709 if (res)
5710 return res;
5711
5712 return (cmos_handle) ? 0 : 1;
5713 }
5714
5715 static void cmos_exit(void)
5716 {
5717 device_remove_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
5718 }
5719
5720 static int cmos_read(struct seq_file *m)
5721 {
5722 /* cmos not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
5723 R30, R31, T20-22, X20-21 */
5724 if (!cmos_handle)
5725 seq_printf(m, "status:\t\tnot supported\n");
5726 else {
5727 seq_printf(m, "status:\t\tsupported\n");
5728 seq_printf(m, "commands:\t<cmd> (<cmd> is 0-21)\n");
5729 }
5730
5731 return 0;
5732 }
5733
5734 static int cmos_write(char *buf)
5735 {
5736 char *cmd;
5737 int cmos_cmd, res;
5738
5739 while ((cmd = strsep(&buf, ","))) {
5740 if (sscanf(cmd, "%u", &cmos_cmd) == 1 &&
5741 cmos_cmd >= 0 && cmos_cmd <= 21) {
5742 /* cmos_cmd set */
5743 } else
5744 return -EINVAL;
5745
5746 res = issue_thinkpad_cmos_command(cmos_cmd);
5747 if (res)
5748 return res;
5749 }
5750
5751 return 0;
5752 }
5753
5754 static struct ibm_struct cmos_driver_data = {
5755 .name = "cmos",
5756 .read = cmos_read,
5757 .write = cmos_write,
5758 .exit = cmos_exit,
5759 };
5760
5761 /*************************************************************************
5762 * LED subdriver
5763 */
5764
5765 enum led_access_mode {
5766 TPACPI_LED_NONE = 0,
5767 TPACPI_LED_570, /* 570 */
5768 TPACPI_LED_OLD, /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
5769 TPACPI_LED_NEW, /* all others */
5770 };
5771
5772 enum { /* For TPACPI_LED_OLD */
5773 TPACPI_LED_EC_HLCL = 0x0c, /* EC reg to get led to power on */
5774 TPACPI_LED_EC_HLBL = 0x0d, /* EC reg to blink a lit led */
5775 TPACPI_LED_EC_HLMS = 0x0e, /* EC reg to select led to command */
5776 };
5777
5778 static enum led_access_mode led_supported;
5779
5780 static acpi_handle led_handle;
5781
5782 #define TPACPI_LED_NUMLEDS 16
5783 static struct tpacpi_led_classdev *tpacpi_leds;
5784 static enum led_status_t tpacpi_led_state_cache[TPACPI_LED_NUMLEDS];
5785 static const char * const tpacpi_led_names[TPACPI_LED_NUMLEDS] = {
5786 /* there's a limit of 19 chars + NULL before 2.6.26 */
5787 "tpacpi::power",
5788 "tpacpi:orange:batt",
5789 "tpacpi:green:batt",
5790 "tpacpi::dock_active",
5791 "tpacpi::bay_active",
5792 "tpacpi::dock_batt",
5793 "tpacpi::unknown_led",
5794 "tpacpi::standby",
5795 "tpacpi::dock_status1",
5796 "tpacpi::dock_status2",
5797 "tpacpi::unknown_led2",
5798 "tpacpi::unknown_led3",
5799 "tpacpi::thinkvantage",
5800 };
5801 #define TPACPI_SAFE_LEDS 0x1081U
5802
5803 static inline bool tpacpi_is_led_restricted(const unsigned int led)
5804 {
5805 #ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS
5806 return false;
5807 #else
5808 return (1U & (TPACPI_SAFE_LEDS >> led)) == 0;
5809 #endif
5810 }
5811
5812 static int led_get_status(const unsigned int led)
5813 {
5814 int status;
5815 enum led_status_t led_s;
5816
5817 switch (led_supported) {
5818 case TPACPI_LED_570:
5819 if (!acpi_evalf(ec_handle,
5820 &status, "GLED", "dd", 1 << led))
5821 return -EIO;
5822 led_s = (status == 0) ?
5823 TPACPI_LED_OFF :
5824 ((status == 1) ?
5825 TPACPI_LED_ON :
5826 TPACPI_LED_BLINK);
5827 tpacpi_led_state_cache[led] = led_s;
5828 return led_s;
5829 default:
5830 return -ENXIO;
5831 }
5832
5833 /* not reached */
5834 }
5835
5836 static int led_set_status(const unsigned int led,
5837 const enum led_status_t ledstatus)
5838 {
5839 /* off, on, blink. Index is led_status_t */
5840 static const unsigned int led_sled_arg1[] = { 0, 1, 3 };
5841 static const unsigned int led_led_arg1[] = { 0, 0x80, 0xc0 };
5842
5843 int rc = 0;
5844
5845 switch (led_supported) {
5846 case TPACPI_LED_570:
5847 /* 570 */
5848 if (unlikely(led > 7))
5849 return -EINVAL;
5850 if (unlikely(tpacpi_is_led_restricted(led)))
5851 return -EPERM;
5852 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
5853 (1 << led), led_sled_arg1[ledstatus]))
5854 return -EIO;
5855 break;
5856 case TPACPI_LED_OLD:
5857 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */
5858 if (unlikely(led > 7))
5859 return -EINVAL;
5860 if (unlikely(tpacpi_is_led_restricted(led)))
5861 return -EPERM;
5862 rc = ec_write(TPACPI_LED_EC_HLMS, (1 << led));
5863 if (rc >= 0)
5864 rc = ec_write(TPACPI_LED_EC_HLBL,
5865 (ledstatus == TPACPI_LED_BLINK) << led);
5866 if (rc >= 0)
5867 rc = ec_write(TPACPI_LED_EC_HLCL,
5868 (ledstatus != TPACPI_LED_OFF) << led);
5869 break;
5870 case TPACPI_LED_NEW:
5871 /* all others */
5872 if (unlikely(led >= TPACPI_LED_NUMLEDS))
5873 return -EINVAL;
5874 if (unlikely(tpacpi_is_led_restricted(led)))
5875 return -EPERM;
5876 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
5877 led, led_led_arg1[ledstatus]))
5878 return -EIO;
5879 break;
5880 default:
5881 return -ENXIO;
5882 }
5883
5884 if (!rc)
5885 tpacpi_led_state_cache[led] = ledstatus;
5886
5887 return rc;
5888 }
5889
5890 static int led_sysfs_set(struct led_classdev *led_cdev,
5891 enum led_brightness brightness)
5892 {
5893 struct tpacpi_led_classdev *data = container_of(led_cdev,
5894 struct tpacpi_led_classdev, led_classdev);
5895 enum led_status_t new_state;
5896
5897 if (brightness == LED_OFF)
5898 new_state = TPACPI_LED_OFF;
5899 else if (tpacpi_led_state_cache[data->led] != TPACPI_LED_BLINK)
5900 new_state = TPACPI_LED_ON;
5901 else
5902 new_state = TPACPI_LED_BLINK;
5903
5904 return led_set_status(data->led, new_state);
5905 }
5906
5907 static int led_sysfs_blink_set(struct led_classdev *led_cdev,
5908 unsigned long *delay_on, unsigned long *delay_off)
5909 {
5910 struct tpacpi_led_classdev *data = container_of(led_cdev,
5911 struct tpacpi_led_classdev, led_classdev);
5912
5913 /* Can we choose the flash rate? */
5914 if (*delay_on == 0 && *delay_off == 0) {
5915 /* yes. set them to the hardware blink rate (1 Hz) */
5916 *delay_on = 500; /* ms */
5917 *delay_off = 500; /* ms */
5918 } else if ((*delay_on != 500) || (*delay_off != 500))
5919 return -EINVAL;
5920
5921 return led_set_status(data->led, TPACPI_LED_BLINK);
5922 }
5923
5924 static enum led_brightness led_sysfs_get(struct led_classdev *led_cdev)
5925 {
5926 int rc;
5927
5928 struct tpacpi_led_classdev *data = container_of(led_cdev,
5929 struct tpacpi_led_classdev, led_classdev);
5930
5931 rc = led_get_status(data->led);
5932
5933 if (rc == TPACPI_LED_OFF || rc < 0)
5934 rc = LED_OFF; /* no error handling in led class :( */
5935 else
5936 rc = LED_FULL;
5937
5938 return rc;
5939 }
5940
5941 static void led_exit(void)
5942 {
5943 unsigned int i;
5944
5945 for (i = 0; i < TPACPI_LED_NUMLEDS; i++)
5946 led_classdev_unregister(&tpacpi_leds[i].led_classdev);
5947
5948 kfree(tpacpi_leds);
5949 }
5950
5951 static int __init tpacpi_init_led(unsigned int led)
5952 {
5953 /* LEDs with no name don't get registered */
5954 if (!tpacpi_led_names[led])
5955 return 0;
5956
5957 tpacpi_leds[led].led_classdev.brightness_set_blocking = &led_sysfs_set;
5958 tpacpi_leds[led].led_classdev.blink_set = &led_sysfs_blink_set;
5959 if (led_supported == TPACPI_LED_570)
5960 tpacpi_leds[led].led_classdev.brightness_get = &led_sysfs_get;
5961
5962 tpacpi_leds[led].led_classdev.name = tpacpi_led_names[led];
5963 tpacpi_leds[led].led = led;
5964
5965 return led_classdev_register(&tpacpi_pdev->dev, &tpacpi_leds[led].led_classdev);
5966 }
5967
5968 static const struct tpacpi_quirk led_useful_qtable[] __initconst = {
5969 TPACPI_Q_IBM('1', 'E', 0x009f), /* A30 */
5970 TPACPI_Q_IBM('1', 'N', 0x009f), /* A31 */
5971 TPACPI_Q_IBM('1', 'G', 0x009f), /* A31 */
5972
5973 TPACPI_Q_IBM('1', 'I', 0x0097), /* T30 */
5974 TPACPI_Q_IBM('1', 'R', 0x0097), /* T40, T41, T42, R50, R51 */
5975 TPACPI_Q_IBM('7', '0', 0x0097), /* T43, R52 */
5976 TPACPI_Q_IBM('1', 'Y', 0x0097), /* T43 */
5977 TPACPI_Q_IBM('1', 'W', 0x0097), /* R50e */
5978 TPACPI_Q_IBM('1', 'V', 0x0097), /* R51 */
5979 TPACPI_Q_IBM('7', '8', 0x0097), /* R51e */
5980 TPACPI_Q_IBM('7', '6', 0x0097), /* R52 */
5981
5982 TPACPI_Q_IBM('1', 'K', 0x00bf), /* X30 */
5983 TPACPI_Q_IBM('1', 'Q', 0x00bf), /* X31, X32 */
5984 TPACPI_Q_IBM('1', 'U', 0x00bf), /* X40 */
5985 TPACPI_Q_IBM('7', '4', 0x00bf), /* X41 */
5986 TPACPI_Q_IBM('7', '5', 0x00bf), /* X41t */
5987
5988 TPACPI_Q_IBM('7', '9', 0x1f97), /* T60 (1) */
5989 TPACPI_Q_IBM('7', '7', 0x1f97), /* Z60* (1) */
5990 TPACPI_Q_IBM('7', 'F', 0x1f97), /* Z61* (1) */
5991 TPACPI_Q_IBM('7', 'B', 0x1fb7), /* X60 (1) */
5992
5993 /* (1) - may have excess leds enabled on MSB */
5994
5995 /* Defaults (order matters, keep last, don't reorder!) */
5996 { /* Lenovo */
5997 .vendor = PCI_VENDOR_ID_LENOVO,
5998 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY,
5999 .quirks = 0x1fffU,
6000 },
6001 { /* IBM ThinkPads with no EC version string */
6002 .vendor = PCI_VENDOR_ID_IBM,
6003 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_UNKNOWN,
6004 .quirks = 0x00ffU,
6005 },
6006 { /* IBM ThinkPads with EC version string */
6007 .vendor = PCI_VENDOR_ID_IBM,
6008 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY,
6009 .quirks = 0x00bfU,
6010 },
6011 };
6012
6013 static enum led_access_mode __init led_init_detect_mode(void)
6014 {
6015 acpi_status status;
6016
6017 if (tpacpi_is_ibm()) {
6018 /* 570 */
6019 status = acpi_get_handle(ec_handle, "SLED", &led_handle);
6020 if (ACPI_SUCCESS(status))
6021 return TPACPI_LED_570;
6022
6023 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
6024 status = acpi_get_handle(ec_handle, "SYSL", &led_handle);
6025 if (ACPI_SUCCESS(status))
6026 return TPACPI_LED_OLD;
6027 }
6028
6029 /* most others */
6030 status = acpi_get_handle(ec_handle, "LED", &led_handle);
6031 if (ACPI_SUCCESS(status))
6032 return TPACPI_LED_NEW;
6033
6034 /* R30, R31, and unknown firmwares */
6035 led_handle = NULL;
6036 return TPACPI_LED_NONE;
6037 }
6038
6039 static int __init led_init(struct ibm_init_struct *iibm)
6040 {
6041 unsigned int i;
6042 int rc;
6043 unsigned long useful_leds;
6044
6045 vdbg_printk(TPACPI_DBG_INIT, "initializing LED subdriver\n");
6046
6047 led_supported = led_init_detect_mode();
6048
6049 if (led_supported != TPACPI_LED_NONE) {
6050 useful_leds = tpacpi_check_quirks(led_useful_qtable,
6051 ARRAY_SIZE(led_useful_qtable));
6052
6053 if (!useful_leds) {
6054 led_handle = NULL;
6055 led_supported = TPACPI_LED_NONE;
6056 }
6057 }
6058
6059 vdbg_printk(TPACPI_DBG_INIT, "LED commands are %s, mode %d\n",
6060 str_supported(led_supported), led_supported);
6061
6062 if (led_supported == TPACPI_LED_NONE)
6063 return 1;
6064
6065 tpacpi_leds = kcalloc(TPACPI_LED_NUMLEDS, sizeof(*tpacpi_leds),
6066 GFP_KERNEL);
6067 if (!tpacpi_leds) {
6068 pr_err("Out of memory for LED data\n");
6069 return -ENOMEM;
6070 }
6071
6072 for (i = 0; i < TPACPI_LED_NUMLEDS; i++) {
6073 tpacpi_leds[i].led = -1;
6074
6075 if (!tpacpi_is_led_restricted(i) && test_bit(i, &useful_leds)) {
6076 rc = tpacpi_init_led(i);
6077 if (rc < 0) {
6078 led_exit();
6079 return rc;
6080 }
6081 }
6082 }
6083
6084 #ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS
6085 pr_notice("warning: userspace override of important firmware LEDs is enabled\n");
6086 #endif
6087 return 0;
6088 }
6089
6090 #define str_led_status(s) \
6091 ((s) == TPACPI_LED_OFF ? "off" : \
6092 ((s) == TPACPI_LED_ON ? "on" : "blinking"))
6093
6094 static int led_read(struct seq_file *m)
6095 {
6096 if (!led_supported) {
6097 seq_printf(m, "status:\t\tnot supported\n");
6098 return 0;
6099 }
6100 seq_printf(m, "status:\t\tsupported\n");
6101
6102 if (led_supported == TPACPI_LED_570) {
6103 /* 570 */
6104 int i, status;
6105 for (i = 0; i < 8; i++) {
6106 status = led_get_status(i);
6107 if (status < 0)
6108 return -EIO;
6109 seq_printf(m, "%d:\t\t%s\n",
6110 i, str_led_status(status));
6111 }
6112 }
6113
6114 seq_printf(m, "commands:\t<led> on, <led> off, <led> blink (<led> is 0-15)\n");
6115
6116 return 0;
6117 }
6118
6119 static int led_write(char *buf)
6120 {
6121 char *cmd;
6122 int led, rc;
6123 enum led_status_t s;
6124
6125 if (!led_supported)
6126 return -ENODEV;
6127
6128 while ((cmd = strsep(&buf, ","))) {
6129 if (sscanf(cmd, "%d", &led) != 1)
6130 return -EINVAL;
6131
6132 if (led < 0 || led > (TPACPI_LED_NUMLEDS - 1))
6133 return -ENODEV;
6134
6135 if (tpacpi_leds[led].led < 0)
6136 return -ENODEV;
6137
6138 if (strstr(cmd, "off")) {
6139 s = TPACPI_LED_OFF;
6140 } else if (strstr(cmd, "on")) {
6141 s = TPACPI_LED_ON;
6142 } else if (strstr(cmd, "blink")) {
6143 s = TPACPI_LED_BLINK;
6144 } else {
6145 return -EINVAL;
6146 }
6147
6148 rc = led_set_status(led, s);
6149 if (rc < 0)
6150 return rc;
6151 }
6152
6153 return 0;
6154 }
6155
6156 static struct ibm_struct led_driver_data = {
6157 .name = "led",
6158 .read = led_read,
6159 .write = led_write,
6160 .exit = led_exit,
6161 };
6162
6163 /*************************************************************************
6164 * Beep subdriver
6165 */
6166
6167 TPACPI_HANDLE(beep, ec, "BEEP"); /* all except R30, R31 */
6168
6169 #define TPACPI_BEEP_Q1 0x0001
6170
6171 static const struct tpacpi_quirk beep_quirk_table[] __initconst = {
6172 TPACPI_Q_IBM('I', 'M', TPACPI_BEEP_Q1), /* 570 */
6173 TPACPI_Q_IBM('I', 'U', TPACPI_BEEP_Q1), /* 570E - unverified */
6174 };
6175
6176 static int __init beep_init(struct ibm_init_struct *iibm)
6177 {
6178 unsigned long quirks;
6179
6180 vdbg_printk(TPACPI_DBG_INIT, "initializing beep subdriver\n");
6181
6182 TPACPI_ACPIHANDLE_INIT(beep);
6183
6184 vdbg_printk(TPACPI_DBG_INIT, "beep is %s\n",
6185 str_supported(beep_handle != NULL));
6186
6187 quirks = tpacpi_check_quirks(beep_quirk_table,
6188 ARRAY_SIZE(beep_quirk_table));
6189
6190 tp_features.beep_needs_two_args = !!(quirks & TPACPI_BEEP_Q1);
6191
6192 return (beep_handle) ? 0 : 1;
6193 }
6194
6195 static int beep_read(struct seq_file *m)
6196 {
6197 if (!beep_handle)
6198 seq_printf(m, "status:\t\tnot supported\n");
6199 else {
6200 seq_printf(m, "status:\t\tsupported\n");
6201 seq_printf(m, "commands:\t<cmd> (<cmd> is 0-17)\n");
6202 }
6203
6204 return 0;
6205 }
6206
6207 static int beep_write(char *buf)
6208 {
6209 char *cmd;
6210 int beep_cmd;
6211
6212 if (!beep_handle)
6213 return -ENODEV;
6214
6215 while ((cmd = strsep(&buf, ","))) {
6216 if (sscanf(cmd, "%u", &beep_cmd) == 1 &&
6217 beep_cmd >= 0 && beep_cmd <= 17) {
6218 /* beep_cmd set */
6219 } else
6220 return -EINVAL;
6221 if (tp_features.beep_needs_two_args) {
6222 if (!acpi_evalf(beep_handle, NULL, NULL, "vdd",
6223 beep_cmd, 0))
6224 return -EIO;
6225 } else {
6226 if (!acpi_evalf(beep_handle, NULL, NULL, "vd",
6227 beep_cmd))
6228 return -EIO;
6229 }
6230 }
6231
6232 return 0;
6233 }
6234
6235 static struct ibm_struct beep_driver_data = {
6236 .name = "beep",
6237 .read = beep_read,
6238 .write = beep_write,
6239 };
6240
6241 /*************************************************************************
6242 * Thermal subdriver
6243 */
6244
6245 enum thermal_access_mode {
6246 TPACPI_THERMAL_NONE = 0, /* No thermal support */
6247 TPACPI_THERMAL_ACPI_TMP07, /* Use ACPI TMP0-7 */
6248 TPACPI_THERMAL_ACPI_UPDT, /* Use ACPI TMP0-7 with UPDT */
6249 TPACPI_THERMAL_TPEC_8, /* Use ACPI EC regs, 8 sensors */
6250 TPACPI_THERMAL_TPEC_16, /* Use ACPI EC regs, 16 sensors */
6251 };
6252
6253 enum { /* TPACPI_THERMAL_TPEC_* */
6254 TP_EC_THERMAL_TMP0 = 0x78, /* ACPI EC regs TMP 0..7 */
6255 TP_EC_THERMAL_TMP8 = 0xC0, /* ACPI EC regs TMP 8..15 */
6256 TP_EC_THERMAL_TMP_NA = -128, /* ACPI EC sensor not available */
6257
6258 TPACPI_THERMAL_SENSOR_NA = -128000, /* Sensor not available */
6259 };
6260
6261
6262 #define TPACPI_MAX_THERMAL_SENSORS 16 /* Max thermal sensors supported */
6263 struct ibm_thermal_sensors_struct {
6264 s32 temp[TPACPI_MAX_THERMAL_SENSORS];
6265 };
6266
6267 static enum thermal_access_mode thermal_read_mode;
6268
6269 /* idx is zero-based */
6270 static int thermal_get_sensor(int idx, s32 *value)
6271 {
6272 int t;
6273 s8 tmp;
6274 char tmpi[5];
6275
6276 t = TP_EC_THERMAL_TMP0;
6277
6278 switch (thermal_read_mode) {
6279 #if TPACPI_MAX_THERMAL_SENSORS >= 16
6280 case TPACPI_THERMAL_TPEC_16:
6281 if (idx >= 8 && idx <= 15) {
6282 t = TP_EC_THERMAL_TMP8;
6283 idx -= 8;
6284 }
6285 #endif
6286 fallthrough;
6287 case TPACPI_THERMAL_TPEC_8:
6288 if (idx <= 7) {
6289 if (!acpi_ec_read(t + idx, &tmp))
6290 return -EIO;
6291 *value = tmp * 1000;
6292 return 0;
6293 }
6294 break;
6295
6296 case TPACPI_THERMAL_ACPI_UPDT:
6297 if (idx <= 7) {
6298 snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
6299 if (!acpi_evalf(ec_handle, NULL, "UPDT", "v"))
6300 return -EIO;
6301 if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
6302 return -EIO;
6303 *value = (t - 2732) * 100;
6304 return 0;
6305 }
6306 break;
6307
6308 case TPACPI_THERMAL_ACPI_TMP07:
6309 if (idx <= 7) {
6310 snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
6311 if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
6312 return -EIO;
6313 if (t > 127 || t < -127)
6314 t = TP_EC_THERMAL_TMP_NA;
6315 *value = t * 1000;
6316 return 0;
6317 }
6318 break;
6319
6320 case TPACPI_THERMAL_NONE:
6321 default:
6322 return -ENOSYS;
6323 }
6324
6325 return -EINVAL;
6326 }
6327
6328 static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s)
6329 {
6330 int res, i;
6331 int n;
6332
6333 n = 8;
6334 i = 0;
6335
6336 if (!s)
6337 return -EINVAL;
6338
6339 if (thermal_read_mode == TPACPI_THERMAL_TPEC_16)
6340 n = 16;
6341
6342 for (i = 0 ; i < n; i++) {
6343 res = thermal_get_sensor(i, &s->temp[i]);
6344 if (res)
6345 return res;
6346 }
6347
6348 return n;
6349 }
6350
6351 static void thermal_dump_all_sensors(void)
6352 {
6353 int n, i;
6354 struct ibm_thermal_sensors_struct t;
6355
6356 n = thermal_get_sensors(&t);
6357 if (n <= 0)
6358 return;
6359
6360 pr_notice("temperatures (Celsius):");
6361
6362 for (i = 0; i < n; i++) {
6363 if (t.temp[i] != TPACPI_THERMAL_SENSOR_NA)
6364 pr_cont(" %d", (int)(t.temp[i] / 1000));
6365 else
6366 pr_cont(" N/A");
6367 }
6368
6369 pr_cont("\n");
6370 }
6371
6372 /* sysfs temp##_input -------------------------------------------------- */
6373
6374 static ssize_t thermal_temp_input_show(struct device *dev,
6375 struct device_attribute *attr,
6376 char *buf)
6377 {
6378 struct sensor_device_attribute *sensor_attr =
6379 to_sensor_dev_attr(attr);
6380 int idx = sensor_attr->index;
6381 s32 value;
6382 int res;
6383
6384 res = thermal_get_sensor(idx, &value);
6385 if (res)
6386 return res;
6387 if (value == TPACPI_THERMAL_SENSOR_NA)
6388 return -ENXIO;
6389
6390 return snprintf(buf, PAGE_SIZE, "%d\n", value);
6391 }
6392
6393 #define THERMAL_SENSOR_ATTR_TEMP(_idxA, _idxB) \
6394 SENSOR_ATTR(temp##_idxA##_input, S_IRUGO, \
6395 thermal_temp_input_show, NULL, _idxB)
6396
6397 static struct sensor_device_attribute sensor_dev_attr_thermal_temp_input[] = {
6398 THERMAL_SENSOR_ATTR_TEMP(1, 0),
6399 THERMAL_SENSOR_ATTR_TEMP(2, 1),
6400 THERMAL_SENSOR_ATTR_TEMP(3, 2),
6401 THERMAL_SENSOR_ATTR_TEMP(4, 3),
6402 THERMAL_SENSOR_ATTR_TEMP(5, 4),
6403 THERMAL_SENSOR_ATTR_TEMP(6, 5),
6404 THERMAL_SENSOR_ATTR_TEMP(7, 6),
6405 THERMAL_SENSOR_ATTR_TEMP(8, 7),
6406 THERMAL_SENSOR_ATTR_TEMP(9, 8),
6407 THERMAL_SENSOR_ATTR_TEMP(10, 9),
6408 THERMAL_SENSOR_ATTR_TEMP(11, 10),
6409 THERMAL_SENSOR_ATTR_TEMP(12, 11),
6410 THERMAL_SENSOR_ATTR_TEMP(13, 12),
6411 THERMAL_SENSOR_ATTR_TEMP(14, 13),
6412 THERMAL_SENSOR_ATTR_TEMP(15, 14),
6413 THERMAL_SENSOR_ATTR_TEMP(16, 15),
6414 };
6415
6416 #define THERMAL_ATTRS(X) \
6417 &sensor_dev_attr_thermal_temp_input[X].dev_attr.attr
6418
6419 static struct attribute *thermal_temp_input_attr[] = {
6420 THERMAL_ATTRS(8),
6421 THERMAL_ATTRS(9),
6422 THERMAL_ATTRS(10),
6423 THERMAL_ATTRS(11),
6424 THERMAL_ATTRS(12),
6425 THERMAL_ATTRS(13),
6426 THERMAL_ATTRS(14),
6427 THERMAL_ATTRS(15),
6428 THERMAL_ATTRS(0),
6429 THERMAL_ATTRS(1),
6430 THERMAL_ATTRS(2),
6431 THERMAL_ATTRS(3),
6432 THERMAL_ATTRS(4),
6433 THERMAL_ATTRS(5),
6434 THERMAL_ATTRS(6),
6435 THERMAL_ATTRS(7),
6436 NULL
6437 };
6438
6439 static const struct attribute_group thermal_temp_input16_group = {
6440 .attrs = thermal_temp_input_attr
6441 };
6442
6443 static const struct attribute_group thermal_temp_input8_group = {
6444 .attrs = &thermal_temp_input_attr[8]
6445 };
6446
6447 #undef THERMAL_SENSOR_ATTR_TEMP
6448 #undef THERMAL_ATTRS
6449
6450 /* --------------------------------------------------------------------- */
6451
6452 static int __init thermal_init(struct ibm_init_struct *iibm)
6453 {
6454 u8 t, ta1, ta2;
6455 int i;
6456 int acpi_tmp7;
6457 int res;
6458
6459 vdbg_printk(TPACPI_DBG_INIT, "initializing thermal subdriver\n");
6460
6461 acpi_tmp7 = acpi_evalf(ec_handle, NULL, "TMP7", "qv");
6462
6463 if (thinkpad_id.ec_model) {
6464 /*
6465 * Direct EC access mode: sensors at registers
6466 * 0x78-0x7F, 0xC0-0xC7. Registers return 0x00 for
6467 * non-implemented, thermal sensors return 0x80 when
6468 * not available
6469 */
6470
6471 ta1 = ta2 = 0;
6472 for (i = 0; i < 8; i++) {
6473 if (acpi_ec_read(TP_EC_THERMAL_TMP0 + i, &t)) {
6474 ta1 |= t;
6475 } else {
6476 ta1 = 0;
6477 break;
6478 }
6479 if (acpi_ec_read(TP_EC_THERMAL_TMP8 + i, &t)) {
6480 ta2 |= t;
6481 } else {
6482 ta1 = 0;
6483 break;
6484 }
6485 }
6486 if (ta1 == 0) {
6487 /* This is sheer paranoia, but we handle it anyway */
6488 if (acpi_tmp7) {
6489 pr_err("ThinkPad ACPI EC access misbehaving, falling back to ACPI TMPx access mode\n");
6490 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
6491 } else {
6492 pr_err("ThinkPad ACPI EC access misbehaving, disabling thermal sensors access\n");
6493 thermal_read_mode = TPACPI_THERMAL_NONE;
6494 }
6495 } else {
6496 thermal_read_mode =
6497 (ta2 != 0) ?
6498 TPACPI_THERMAL_TPEC_16 : TPACPI_THERMAL_TPEC_8;
6499 }
6500 } else if (acpi_tmp7) {
6501 if (tpacpi_is_ibm() &&
6502 acpi_evalf(ec_handle, NULL, "UPDT", "qv")) {
6503 /* 600e/x, 770e, 770x */
6504 thermal_read_mode = TPACPI_THERMAL_ACPI_UPDT;
6505 } else {
6506 /* IBM/LENOVO DSDT EC.TMPx access, max 8 sensors */
6507 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
6508 }
6509 } else {
6510 /* temperatures not supported on 570, G4x, R30, R31, R32 */
6511 thermal_read_mode = TPACPI_THERMAL_NONE;
6512 }
6513
6514 vdbg_printk(TPACPI_DBG_INIT, "thermal is %s, mode %d\n",
6515 str_supported(thermal_read_mode != TPACPI_THERMAL_NONE),
6516 thermal_read_mode);
6517
6518 switch (thermal_read_mode) {
6519 case TPACPI_THERMAL_TPEC_16:
6520 res = sysfs_create_group(&tpacpi_hwmon->kobj,
6521 &thermal_temp_input16_group);
6522 if (res)
6523 return res;
6524 break;
6525 case TPACPI_THERMAL_TPEC_8:
6526 case TPACPI_THERMAL_ACPI_TMP07:
6527 case TPACPI_THERMAL_ACPI_UPDT:
6528 res = sysfs_create_group(&tpacpi_hwmon->kobj,
6529 &thermal_temp_input8_group);
6530 if (res)
6531 return res;
6532 break;
6533 case TPACPI_THERMAL_NONE:
6534 default:
6535 return 1;
6536 }
6537
6538 return 0;
6539 }
6540
6541 static void thermal_exit(void)
6542 {
6543 switch (thermal_read_mode) {
6544 case TPACPI_THERMAL_TPEC_16:
6545 sysfs_remove_group(&tpacpi_hwmon->kobj,
6546 &thermal_temp_input16_group);
6547 break;
6548 case TPACPI_THERMAL_TPEC_8:
6549 case TPACPI_THERMAL_ACPI_TMP07:
6550 case TPACPI_THERMAL_ACPI_UPDT:
6551 sysfs_remove_group(&tpacpi_hwmon->kobj,
6552 &thermal_temp_input8_group);
6553 break;
6554 case TPACPI_THERMAL_NONE:
6555 default:
6556 break;
6557 }
6558 }
6559
6560 static int thermal_read(struct seq_file *m)
6561 {
6562 int n, i;
6563 struct ibm_thermal_sensors_struct t;
6564
6565 n = thermal_get_sensors(&t);
6566 if (unlikely(n < 0))
6567 return n;
6568
6569 seq_printf(m, "temperatures:\t");
6570
6571 if (n > 0) {
6572 for (i = 0; i < (n - 1); i++)
6573 seq_printf(m, "%d ", t.temp[i] / 1000);
6574 seq_printf(m, "%d\n", t.temp[i] / 1000);
6575 } else
6576 seq_printf(m, "not supported\n");
6577
6578 return 0;
6579 }
6580
6581 static struct ibm_struct thermal_driver_data = {
6582 .name = "thermal",
6583 .read = thermal_read,
6584 .exit = thermal_exit,
6585 };
6586
6587 /*************************************************************************
6588 * Backlight/brightness subdriver
6589 */
6590
6591 #define TPACPI_BACKLIGHT_DEV_NAME "thinkpad_screen"
6592
6593 /*
6594 * ThinkPads can read brightness from two places: EC HBRV (0x31), or
6595 * CMOS NVRAM byte 0x5E, bits 0-3.
6596 *
6597 * EC HBRV (0x31) has the following layout
6598 * Bit 7: unknown function
6599 * Bit 6: unknown function
6600 * Bit 5: Z: honour scale changes, NZ: ignore scale changes
6601 * Bit 4: must be set to zero to avoid problems
6602 * Bit 3-0: backlight brightness level
6603 *
6604 * brightness_get_raw returns status data in the HBRV layout
6605 *
6606 * WARNING: The X61 has been verified to use HBRV for something else, so
6607 * this should be used _only_ on IBM ThinkPads, and maybe with some careful
6608 * testing on the very early *60 Lenovo models...
6609 */
6610
6611 enum {
6612 TP_EC_BACKLIGHT = 0x31,
6613
6614 /* TP_EC_BACKLIGHT bitmasks */
6615 TP_EC_BACKLIGHT_LVLMSK = 0x1F,
6616 TP_EC_BACKLIGHT_CMDMSK = 0xE0,
6617 TP_EC_BACKLIGHT_MAPSW = 0x20,
6618 };
6619
6620 enum tpacpi_brightness_access_mode {
6621 TPACPI_BRGHT_MODE_AUTO = 0, /* Not implemented yet */
6622 TPACPI_BRGHT_MODE_EC, /* EC control */
6623 TPACPI_BRGHT_MODE_UCMS_STEP, /* UCMS step-based control */
6624 TPACPI_BRGHT_MODE_ECNVRAM, /* EC control w/ NVRAM store */
6625 TPACPI_BRGHT_MODE_MAX
6626 };
6627
6628 static struct backlight_device *ibm_backlight_device;
6629
6630 static enum tpacpi_brightness_access_mode brightness_mode =
6631 TPACPI_BRGHT_MODE_MAX;
6632
6633 static unsigned int brightness_enable = 2; /* 2 = auto, 0 = no, 1 = yes */
6634
6635 static struct mutex brightness_mutex;
6636
6637 /* NVRAM brightness access,
6638 * call with brightness_mutex held! */
6639 static unsigned int tpacpi_brightness_nvram_get(void)
6640 {
6641 u8 lnvram;
6642
6643 lnvram = (nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS)
6644 & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
6645 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
6646 lnvram &= bright_maxlvl;
6647
6648 return lnvram;
6649 }
6650
6651 static void tpacpi_brightness_checkpoint_nvram(void)
6652 {
6653 u8 lec = 0;
6654 u8 b_nvram;
6655
6656 if (brightness_mode != TPACPI_BRGHT_MODE_ECNVRAM)
6657 return;
6658
6659 vdbg_printk(TPACPI_DBG_BRGHT,
6660 "trying to checkpoint backlight level to NVRAM...\n");
6661
6662 if (mutex_lock_killable(&brightness_mutex) < 0)
6663 return;
6664
6665 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
6666 goto unlock;
6667 lec &= TP_EC_BACKLIGHT_LVLMSK;
6668 b_nvram = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS);
6669
6670 if (lec != ((b_nvram & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
6671 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS)) {
6672 /* NVRAM needs update */
6673 b_nvram &= ~(TP_NVRAM_MASK_LEVEL_BRIGHTNESS <<
6674 TP_NVRAM_POS_LEVEL_BRIGHTNESS);
6675 b_nvram |= lec;
6676 nvram_write_byte(b_nvram, TP_NVRAM_ADDR_BRIGHTNESS);
6677 dbg_printk(TPACPI_DBG_BRGHT,
6678 "updated NVRAM backlight level to %u (0x%02x)\n",
6679 (unsigned int) lec, (unsigned int) b_nvram);
6680 } else
6681 vdbg_printk(TPACPI_DBG_BRGHT,
6682 "NVRAM backlight level already is %u (0x%02x)\n",
6683 (unsigned int) lec, (unsigned int) b_nvram);
6684
6685 unlock:
6686 mutex_unlock(&brightness_mutex);
6687 }
6688
6689
6690 /* call with brightness_mutex held! */
6691 static int tpacpi_brightness_get_raw(int *status)
6692 {
6693 u8 lec = 0;
6694
6695 switch (brightness_mode) {
6696 case TPACPI_BRGHT_MODE_UCMS_STEP:
6697 *status = tpacpi_brightness_nvram_get();
6698 return 0;
6699 case TPACPI_BRGHT_MODE_EC:
6700 case TPACPI_BRGHT_MODE_ECNVRAM:
6701 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
6702 return -EIO;
6703 *status = lec;
6704 return 0;
6705 default:
6706 return -ENXIO;
6707 }
6708 }
6709
6710 /* call with brightness_mutex held! */
6711 /* do NOT call with illegal backlight level value */
6712 static int tpacpi_brightness_set_ec(unsigned int value)
6713 {
6714 u8 lec = 0;
6715
6716 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
6717 return -EIO;
6718
6719 if (unlikely(!acpi_ec_write(TP_EC_BACKLIGHT,
6720 (lec & TP_EC_BACKLIGHT_CMDMSK) |
6721 (value & TP_EC_BACKLIGHT_LVLMSK))))
6722 return -EIO;
6723
6724 return 0;
6725 }
6726
6727 /* call with brightness_mutex held! */
6728 static int tpacpi_brightness_set_ucmsstep(unsigned int value)
6729 {
6730 int cmos_cmd, inc;
6731 unsigned int current_value, i;
6732
6733 current_value = tpacpi_brightness_nvram_get();
6734
6735 if (value == current_value)
6736 return 0;
6737
6738 cmos_cmd = (value > current_value) ?
6739 TP_CMOS_BRIGHTNESS_UP :
6740 TP_CMOS_BRIGHTNESS_DOWN;
6741 inc = (value > current_value) ? 1 : -1;
6742
6743 for (i = current_value; i != value; i += inc)
6744 if (issue_thinkpad_cmos_command(cmos_cmd))
6745 return -EIO;
6746
6747 return 0;
6748 }
6749
6750 /* May return EINTR which can always be mapped to ERESTARTSYS */
6751 static int brightness_set(unsigned int value)
6752 {
6753 int res;
6754
6755 if (value > bright_maxlvl)
6756 return -EINVAL;
6757
6758 vdbg_printk(TPACPI_DBG_BRGHT,
6759 "set backlight level to %d\n", value);
6760
6761 res = mutex_lock_killable(&brightness_mutex);
6762 if (res < 0)
6763 return res;
6764
6765 switch (brightness_mode) {
6766 case TPACPI_BRGHT_MODE_EC:
6767 case TPACPI_BRGHT_MODE_ECNVRAM:
6768 res = tpacpi_brightness_set_ec(value);
6769 break;
6770 case TPACPI_BRGHT_MODE_UCMS_STEP:
6771 res = tpacpi_brightness_set_ucmsstep(value);
6772 break;
6773 default:
6774 res = -ENXIO;
6775 }
6776
6777 mutex_unlock(&brightness_mutex);
6778 return res;
6779 }
6780
6781 /* sysfs backlight class ----------------------------------------------- */
6782
6783 static int brightness_update_status(struct backlight_device *bd)
6784 {
6785 unsigned int level =
6786 (bd->props.fb_blank == FB_BLANK_UNBLANK &&
6787 bd->props.power == FB_BLANK_UNBLANK) ?
6788 bd->props.brightness : 0;
6789
6790 dbg_printk(TPACPI_DBG_BRGHT,
6791 "backlight: attempt to set level to %d\n",
6792 level);
6793
6794 /* it is the backlight class's job (caller) to handle
6795 * EINTR and other errors properly */
6796 return brightness_set(level);
6797 }
6798
6799 static int brightness_get(struct backlight_device *bd)
6800 {
6801 int status, res;
6802
6803 res = mutex_lock_killable(&brightness_mutex);
6804 if (res < 0)
6805 return 0;
6806
6807 res = tpacpi_brightness_get_raw(&status);
6808
6809 mutex_unlock(&brightness_mutex);
6810
6811 if (res < 0)
6812 return 0;
6813
6814 return status & TP_EC_BACKLIGHT_LVLMSK;
6815 }
6816
6817 static void tpacpi_brightness_notify_change(void)
6818 {
6819 backlight_force_update(ibm_backlight_device,
6820 BACKLIGHT_UPDATE_HOTKEY);
6821 }
6822
6823 static const struct backlight_ops ibm_backlight_data = {
6824 .get_brightness = brightness_get,
6825 .update_status = brightness_update_status,
6826 };
6827
6828 /* --------------------------------------------------------------------- */
6829
6830 /*
6831 * Call _BCL method of video device. On some ThinkPads this will
6832 * switch the firmware to the ACPI brightness control mode.
6833 */
6834
6835 static int __init tpacpi_query_bcl_levels(acpi_handle handle)
6836 {
6837 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
6838 union acpi_object *obj;
6839 struct acpi_device *device, *child;
6840 int rc;
6841
6842 if (acpi_bus_get_device(handle, &device))
6843 return 0;
6844
6845 rc = 0;
6846 list_for_each_entry(child, &device->children, node) {
6847 acpi_status status = acpi_evaluate_object(child->handle, "_BCL",
6848 NULL, &buffer);
6849 if (ACPI_FAILURE(status)) {
6850 buffer.length = ACPI_ALLOCATE_BUFFER;
6851 continue;
6852 }
6853
6854 obj = (union acpi_object *)buffer.pointer;
6855 if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) {
6856 pr_err("Unknown _BCL data, please report this to %s\n",
6857 TPACPI_MAIL);
6858 rc = 0;
6859 } else {
6860 rc = obj->package.count;
6861 }
6862 break;
6863 }
6864
6865 kfree(buffer.pointer);
6866 return rc;
6867 }
6868
6869
6870 /*
6871 * Returns 0 (no ACPI _BCL or _BCL invalid), or size of brightness map
6872 */
6873 static unsigned int __init tpacpi_check_std_acpi_brightness_support(void)
6874 {
6875 acpi_handle video_device;
6876 int bcl_levels = 0;
6877
6878 tpacpi_acpi_handle_locate("video", NULL, &video_device);
6879 if (video_device)
6880 bcl_levels = tpacpi_query_bcl_levels(video_device);
6881
6882 tp_features.bright_acpimode = (bcl_levels > 0);
6883
6884 return (bcl_levels > 2) ? (bcl_levels - 2) : 0;
6885 }
6886
6887 /*
6888 * These are only useful for models that have only one possibility
6889 * of GPU. If the BIOS model handles both ATI and Intel, don't use
6890 * these quirks.
6891 */
6892 #define TPACPI_BRGHT_Q_NOEC 0x0001 /* Must NOT use EC HBRV */
6893 #define TPACPI_BRGHT_Q_EC 0x0002 /* Should or must use EC HBRV */
6894 #define TPACPI_BRGHT_Q_ASK 0x8000 /* Ask for user report */
6895
6896 static const struct tpacpi_quirk brightness_quirk_table[] __initconst = {
6897 /* Models with ATI GPUs known to require ECNVRAM mode */
6898 TPACPI_Q_IBM('1', 'Y', TPACPI_BRGHT_Q_EC), /* T43/p ATI */
6899
6900 /* Models with ATI GPUs that can use ECNVRAM */
6901 TPACPI_Q_IBM('1', 'R', TPACPI_BRGHT_Q_EC), /* R50,51 T40-42 */
6902 TPACPI_Q_IBM('1', 'Q', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
6903 TPACPI_Q_IBM('7', '6', TPACPI_BRGHT_Q_EC), /* R52 */
6904 TPACPI_Q_IBM('7', '8', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
6905
6906 /* Models with Intel Extreme Graphics 2 */
6907 TPACPI_Q_IBM('1', 'U', TPACPI_BRGHT_Q_NOEC), /* X40 */
6908 TPACPI_Q_IBM('1', 'V', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
6909 TPACPI_Q_IBM('1', 'W', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
6910
6911 /* Models with Intel GMA900 */
6912 TPACPI_Q_IBM('7', '0', TPACPI_BRGHT_Q_NOEC), /* T43, R52 */
6913 TPACPI_Q_IBM('7', '4', TPACPI_BRGHT_Q_NOEC), /* X41 */
6914 TPACPI_Q_IBM('7', '5', TPACPI_BRGHT_Q_NOEC), /* X41 Tablet */
6915 };
6916
6917 /*
6918 * Returns < 0 for error, otherwise sets tp_features.bright_*
6919 * and bright_maxlvl.
6920 */
6921 static void __init tpacpi_detect_brightness_capabilities(void)
6922 {
6923 unsigned int b;
6924
6925 vdbg_printk(TPACPI_DBG_INIT,
6926 "detecting firmware brightness interface capabilities\n");
6927
6928 /* we could run a quirks check here (same table used by
6929 * brightness_init) if needed */
6930
6931 /*
6932 * We always attempt to detect acpi support, so as to switch
6933 * Lenovo Vista BIOS to ACPI brightness mode even if we are not
6934 * going to publish a backlight interface
6935 */
6936 b = tpacpi_check_std_acpi_brightness_support();
6937 switch (b) {
6938 case 16:
6939 bright_maxlvl = 15;
6940 break;
6941 case 8:
6942 case 0:
6943 bright_maxlvl = 7;
6944 break;
6945 default:
6946 tp_features.bright_unkfw = 1;
6947 bright_maxlvl = b - 1;
6948 }
6949 pr_debug("detected %u brightness levels\n", bright_maxlvl + 1);
6950 }
6951
6952 static int __init brightness_init(struct ibm_init_struct *iibm)
6953 {
6954 struct backlight_properties props;
6955 int b;
6956 unsigned long quirks;
6957
6958 vdbg_printk(TPACPI_DBG_INIT, "initializing brightness subdriver\n");
6959
6960 mutex_init(&brightness_mutex);
6961
6962 quirks = tpacpi_check_quirks(brightness_quirk_table,
6963 ARRAY_SIZE(brightness_quirk_table));
6964
6965 /* tpacpi_detect_brightness_capabilities() must have run already */
6966
6967 /* if it is unknown, we don't handle it: it wouldn't be safe */
6968 if (tp_features.bright_unkfw)
6969 return 1;
6970
6971 if (!brightness_enable) {
6972 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT,
6973 "brightness support disabled by module parameter\n");
6974 return 1;
6975 }
6976
6977 if (acpi_video_get_backlight_type() != acpi_backlight_vendor) {
6978 if (brightness_enable > 1) {
6979 pr_info("Standard ACPI backlight interface available, not loading native one\n");
6980 return 1;
6981 } else if (brightness_enable == 1) {
6982 pr_warn("Cannot enable backlight brightness support, ACPI is already handling it. Refer to the acpi_backlight kernel parameter.\n");
6983 return 1;
6984 }
6985 } else if (!tp_features.bright_acpimode) {
6986 pr_notice("ACPI backlight interface not available\n");
6987 return 1;
6988 }
6989
6990 pr_notice("ACPI native brightness control enabled\n");
6991
6992 /*
6993 * Check for module parameter bogosity, note that we
6994 * init brightness_mode to TPACPI_BRGHT_MODE_MAX in order to be
6995 * able to detect "unspecified"
6996 */
6997 if (brightness_mode > TPACPI_BRGHT_MODE_MAX)
6998 return -EINVAL;
6999
7000 /* TPACPI_BRGHT_MODE_AUTO not implemented yet, just use default */
7001 if (brightness_mode == TPACPI_BRGHT_MODE_AUTO ||
7002 brightness_mode == TPACPI_BRGHT_MODE_MAX) {
7003 if (quirks & TPACPI_BRGHT_Q_EC)
7004 brightness_mode = TPACPI_BRGHT_MODE_ECNVRAM;
7005 else
7006 brightness_mode = TPACPI_BRGHT_MODE_UCMS_STEP;
7007
7008 dbg_printk(TPACPI_DBG_BRGHT,
7009 "driver auto-selected brightness_mode=%d\n",
7010 brightness_mode);
7011 }
7012
7013 /* Safety */
7014 if (!tpacpi_is_ibm() &&
7015 (brightness_mode == TPACPI_BRGHT_MODE_ECNVRAM ||
7016 brightness_mode == TPACPI_BRGHT_MODE_EC))
7017 return -EINVAL;
7018
7019 if (tpacpi_brightness_get_raw(&b) < 0)
7020 return 1;
7021
7022 memset(&props, 0, sizeof(struct backlight_properties));
7023 props.type = BACKLIGHT_PLATFORM;
7024 props.max_brightness = bright_maxlvl;
7025 props.brightness = b & TP_EC_BACKLIGHT_LVLMSK;
7026 ibm_backlight_device = backlight_device_register(TPACPI_BACKLIGHT_DEV_NAME,
7027 NULL, NULL,
7028 &ibm_backlight_data,
7029 &props);
7030 if (IS_ERR(ibm_backlight_device)) {
7031 int rc = PTR_ERR(ibm_backlight_device);
7032 ibm_backlight_device = NULL;
7033 pr_err("Could not register backlight device\n");
7034 return rc;
7035 }
7036 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT,
7037 "brightness is supported\n");
7038
7039 if (quirks & TPACPI_BRGHT_Q_ASK) {
7040 pr_notice("brightness: will use unverified default: brightness_mode=%d\n",
7041 brightness_mode);
7042 pr_notice("brightness: please report to %s whether it works well or not on your ThinkPad\n",
7043 TPACPI_MAIL);
7044 }
7045
7046 /* Added by mistake in early 2007. Probably useless, but it could
7047 * be working around some unknown firmware problem where the value
7048 * read at startup doesn't match the real hardware state... so leave
7049 * it in place just in case */
7050 backlight_update_status(ibm_backlight_device);
7051
7052 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT,
7053 "brightness: registering brightness hotkeys as change notification\n");
7054 tpacpi_hotkey_driver_mask_set(hotkey_driver_mask
7055 | TP_ACPI_HKEY_BRGHTUP_MASK
7056 | TP_ACPI_HKEY_BRGHTDWN_MASK);
7057 return 0;
7058 }
7059
7060 static void brightness_suspend(void)
7061 {
7062 tpacpi_brightness_checkpoint_nvram();
7063 }
7064
7065 static void brightness_shutdown(void)
7066 {
7067 tpacpi_brightness_checkpoint_nvram();
7068 }
7069
7070 static void brightness_exit(void)
7071 {
7072 if (ibm_backlight_device) {
7073 vdbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_BRGHT,
7074 "calling backlight_device_unregister()\n");
7075 backlight_device_unregister(ibm_backlight_device);
7076 }
7077
7078 tpacpi_brightness_checkpoint_nvram();
7079 }
7080
7081 static int brightness_read(struct seq_file *m)
7082 {
7083 int level;
7084
7085 level = brightness_get(NULL);
7086 if (level < 0) {
7087 seq_printf(m, "level:\t\tunreadable\n");
7088 } else {
7089 seq_printf(m, "level:\t\t%d\n", level);
7090 seq_printf(m, "commands:\tup, down\n");
7091 seq_printf(m, "commands:\tlevel <level> (<level> is 0-%d)\n",
7092 bright_maxlvl);
7093 }
7094
7095 return 0;
7096 }
7097
7098 static int brightness_write(char *buf)
7099 {
7100 int level;
7101 int rc;
7102 char *cmd;
7103
7104 level = brightness_get(NULL);
7105 if (level < 0)
7106 return level;
7107
7108 while ((cmd = strsep(&buf, ","))) {
7109 if (strlencmp(cmd, "up") == 0) {
7110 if (level < bright_maxlvl)
7111 level++;
7112 } else if (strlencmp(cmd, "down") == 0) {
7113 if (level > 0)
7114 level--;
7115 } else if (sscanf(cmd, "level %d", &level) == 1 &&
7116 level >= 0 && level <= bright_maxlvl) {
7117 /* new level set */
7118 } else
7119 return -EINVAL;
7120 }
7121
7122 tpacpi_disclose_usertask("procfs brightness",
7123 "set level to %d\n", level);
7124
7125 /*
7126 * Now we know what the final level should be, so we try to set it.
7127 * Doing it this way makes the syscall restartable in case of EINTR
7128 */
7129 rc = brightness_set(level);
7130 if (!rc && ibm_backlight_device)
7131 backlight_force_update(ibm_backlight_device,
7132 BACKLIGHT_UPDATE_SYSFS);
7133 return (rc == -EINTR) ? -ERESTARTSYS : rc;
7134 }
7135
7136 static struct ibm_struct brightness_driver_data = {
7137 .name = "brightness",
7138 .read = brightness_read,
7139 .write = brightness_write,
7140 .exit = brightness_exit,
7141 .suspend = brightness_suspend,
7142 .shutdown = brightness_shutdown,
7143 };
7144
7145 /*************************************************************************
7146 * Volume subdriver
7147 */
7148
7149 /*
7150 * IBM ThinkPads have a simple volume controller with MUTE gating.
7151 * Very early Lenovo ThinkPads follow the IBM ThinkPad spec.
7152 *
7153 * Since the *61 series (and probably also the later *60 series), Lenovo
7154 * ThinkPads only implement the MUTE gate.
7155 *
7156 * EC register 0x30
7157 * Bit 6: MUTE (1 mutes sound)
7158 * Bit 3-0: Volume
7159 * Other bits should be zero as far as we know.
7160 *
7161 * This is also stored in CMOS NVRAM, byte 0x60, bit 6 (MUTE), and
7162 * bits 3-0 (volume). Other bits in NVRAM may have other functions,
7163 * such as bit 7 which is used to detect repeated presses of MUTE,
7164 * and we leave them unchanged.
7165 *
7166 * On newer Lenovo ThinkPads, the EC can automatically change the volume
7167 * in response to user input. Unfortunately, this rarely works well.
7168 * The laptop changes the state of its internal MUTE gate and, on some
7169 * models, sends KEY_MUTE, causing any user code that responds to the
7170 * mute button to get confused. The hardware MUTE gate is also
7171 * unnecessary, since user code can handle the mute button without
7172 * kernel or EC help.
7173 *
7174 * To avoid confusing userspace, we simply disable all EC-based mute
7175 * and volume controls when possible.
7176 */
7177
7178 #ifdef CONFIG_THINKPAD_ACPI_ALSA_SUPPORT
7179
7180 #define TPACPI_ALSA_DRVNAME "ThinkPad EC"
7181 #define TPACPI_ALSA_SHRTNAME "ThinkPad Console Audio Control"
7182 #define TPACPI_ALSA_MIXERNAME TPACPI_ALSA_SHRTNAME
7183
7184 #if SNDRV_CARDS <= 32
7185 #define DEFAULT_ALSA_IDX ~((1 << (SNDRV_CARDS - 3)) - 1)
7186 #else
7187 #define DEFAULT_ALSA_IDX ~((1 << (32 - 3)) - 1)
7188 #endif
7189 static int alsa_index = DEFAULT_ALSA_IDX; /* last three slots */
7190 static char *alsa_id = "ThinkPadEC";
7191 static bool alsa_enable = SNDRV_DEFAULT_ENABLE1;
7192
7193 struct tpacpi_alsa_data {
7194 struct snd_card *card;
7195 struct snd_ctl_elem_id *ctl_mute_id;
7196 struct snd_ctl_elem_id *ctl_vol_id;
7197 };
7198
7199 static struct snd_card *alsa_card;
7200
7201 enum {
7202 TP_EC_AUDIO = 0x30,
7203
7204 /* TP_EC_AUDIO bits */
7205 TP_EC_AUDIO_MUTESW = 6,
7206
7207 /* TP_EC_AUDIO bitmasks */
7208 TP_EC_AUDIO_LVL_MSK = 0x0F,
7209 TP_EC_AUDIO_MUTESW_MSK = (1 << TP_EC_AUDIO_MUTESW),
7210
7211 /* Maximum volume */
7212 TP_EC_VOLUME_MAX = 14,
7213 };
7214
7215 enum tpacpi_volume_access_mode {
7216 TPACPI_VOL_MODE_AUTO = 0, /* Not implemented yet */
7217 TPACPI_VOL_MODE_EC, /* Pure EC control */
7218 TPACPI_VOL_MODE_UCMS_STEP, /* UCMS step-based control: N/A */
7219 TPACPI_VOL_MODE_ECNVRAM, /* EC control w/ NVRAM store */
7220 TPACPI_VOL_MODE_MAX
7221 };
7222
7223 enum tpacpi_volume_capabilities {
7224 TPACPI_VOL_CAP_AUTO = 0, /* Use white/blacklist */
7225 TPACPI_VOL_CAP_VOLMUTE, /* Output vol and mute */
7226 TPACPI_VOL_CAP_MUTEONLY, /* Output mute only */
7227 TPACPI_VOL_CAP_MAX
7228 };
7229
7230 enum tpacpi_mute_btn_mode {
7231 TP_EC_MUTE_BTN_LATCH = 0, /* Mute mutes; up/down unmutes */
7232 /* We don't know what mode 1 is. */
7233 TP_EC_MUTE_BTN_NONE = 2, /* Mute and up/down are just keys */
7234 TP_EC_MUTE_BTN_TOGGLE = 3, /* Mute toggles; up/down unmutes */
7235 };
7236
7237 static enum tpacpi_volume_access_mode volume_mode =
7238 TPACPI_VOL_MODE_MAX;
7239
7240 static enum tpacpi_volume_capabilities volume_capabilities;
7241 static bool volume_control_allowed;
7242 static bool software_mute_requested = true;
7243 static bool software_mute_active;
7244 static int software_mute_orig_mode;
7245
7246 /*
7247 * Used to syncronize writers to TP_EC_AUDIO and
7248 * TP_NVRAM_ADDR_MIXER, as we need to do read-modify-write
7249 */
7250 static struct mutex volume_mutex;
7251
7252 static void tpacpi_volume_checkpoint_nvram(void)
7253 {
7254 u8 lec = 0;
7255 u8 b_nvram;
7256 u8 ec_mask;
7257
7258 if (volume_mode != TPACPI_VOL_MODE_ECNVRAM)
7259 return;
7260 if (!volume_control_allowed)
7261 return;
7262 if (software_mute_active)
7263 return;
7264
7265 vdbg_printk(TPACPI_DBG_MIXER,
7266 "trying to checkpoint mixer state to NVRAM...\n");
7267
7268 if (tp_features.mixer_no_level_control)
7269 ec_mask = TP_EC_AUDIO_MUTESW_MSK;
7270 else
7271 ec_mask = TP_EC_AUDIO_MUTESW_MSK | TP_EC_AUDIO_LVL_MSK;
7272
7273 if (mutex_lock_killable(&volume_mutex) < 0)
7274 return;
7275
7276 if (unlikely(!acpi_ec_read(TP_EC_AUDIO, &lec)))
7277 goto unlock;
7278 lec &= ec_mask;
7279 b_nvram = nvram_read_byte(TP_NVRAM_ADDR_MIXER);
7280
7281 if (lec != (b_nvram & ec_mask)) {
7282 /* NVRAM needs update */
7283 b_nvram &= ~ec_mask;
7284 b_nvram |= lec;
7285 nvram_write_byte(b_nvram, TP_NVRAM_ADDR_MIXER);
7286 dbg_printk(TPACPI_DBG_MIXER,
7287 "updated NVRAM mixer status to 0x%02x (0x%02x)\n",
7288 (unsigned int) lec, (unsigned int) b_nvram);
7289 } else {
7290 vdbg_printk(TPACPI_DBG_MIXER,
7291 "NVRAM mixer status already is 0x%02x (0x%02x)\n",
7292 (unsigned int) lec, (unsigned int) b_nvram);
7293 }
7294
7295 unlock:
7296 mutex_unlock(&volume_mutex);
7297 }
7298
7299 static int volume_get_status_ec(u8 *status)
7300 {
7301 u8 s;
7302
7303 if (!acpi_ec_read(TP_EC_AUDIO, &s))
7304 return -EIO;
7305
7306 *status = s;
7307
7308 dbg_printk(TPACPI_DBG_MIXER, "status 0x%02x\n", s);
7309
7310 return 0;
7311 }
7312
7313 static int volume_get_status(u8 *status)
7314 {
7315 return volume_get_status_ec(status);
7316 }
7317
7318 static int volume_set_status_ec(const u8 status)
7319 {
7320 if (!acpi_ec_write(TP_EC_AUDIO, status))
7321 return -EIO;
7322
7323 dbg_printk(TPACPI_DBG_MIXER, "set EC mixer to 0x%02x\n", status);
7324
7325 /*
7326 * On X200s, and possibly on others, it can take a while for
7327 * reads to become correct.
7328 */
7329 msleep(1);
7330
7331 return 0;
7332 }
7333
7334 static int volume_set_status(const u8 status)
7335 {
7336 return volume_set_status_ec(status);
7337 }
7338
7339 /* returns < 0 on error, 0 on no change, 1 on change */
7340 static int __volume_set_mute_ec(const bool mute)
7341 {
7342 int rc;
7343 u8 s, n;
7344
7345 if (mutex_lock_killable(&volume_mutex) < 0)
7346 return -EINTR;
7347
7348 rc = volume_get_status_ec(&s);
7349 if (rc)
7350 goto unlock;
7351
7352 n = (mute) ? s | TP_EC_AUDIO_MUTESW_MSK :
7353 s & ~TP_EC_AUDIO_MUTESW_MSK;
7354
7355 if (n != s) {
7356 rc = volume_set_status_ec(n);
7357 if (!rc)
7358 rc = 1;
7359 }
7360
7361 unlock:
7362 mutex_unlock(&volume_mutex);
7363 return rc;
7364 }
7365
7366 static int volume_alsa_set_mute(const bool mute)
7367 {
7368 dbg_printk(TPACPI_DBG_MIXER, "ALSA: trying to %smute\n",
7369 (mute) ? "" : "un");
7370 return __volume_set_mute_ec(mute);
7371 }
7372
7373 static int volume_set_mute(const bool mute)
7374 {
7375 int rc;
7376
7377 dbg_printk(TPACPI_DBG_MIXER, "trying to %smute\n",
7378 (mute) ? "" : "un");
7379
7380 rc = __volume_set_mute_ec(mute);
7381 return (rc < 0) ? rc : 0;
7382 }
7383
7384 /* returns < 0 on error, 0 on no change, 1 on change */
7385 static int __volume_set_volume_ec(const u8 vol)
7386 {
7387 int rc;
7388 u8 s, n;
7389
7390 if (vol > TP_EC_VOLUME_MAX)
7391 return -EINVAL;
7392
7393 if (mutex_lock_killable(&volume_mutex) < 0)
7394 return -EINTR;
7395
7396 rc = volume_get_status_ec(&s);
7397 if (rc)
7398 goto unlock;
7399
7400 n = (s & ~TP_EC_AUDIO_LVL_MSK) | vol;
7401
7402 if (n != s) {
7403 rc = volume_set_status_ec(n);
7404 if (!rc)
7405 rc = 1;
7406 }
7407
7408 unlock:
7409 mutex_unlock(&volume_mutex);
7410 return rc;
7411 }
7412
7413 static int volume_set_software_mute(bool startup)
7414 {
7415 int result;
7416
7417 if (!tpacpi_is_lenovo())
7418 return -ENODEV;
7419
7420 if (startup) {
7421 if (!acpi_evalf(ec_handle, &software_mute_orig_mode,
7422 "HAUM", "qd"))
7423 return -EIO;
7424
7425 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
7426 "Initial HAUM setting was %d\n",
7427 software_mute_orig_mode);
7428 }
7429
7430 if (!acpi_evalf(ec_handle, &result, "SAUM", "qdd",
7431 (int)TP_EC_MUTE_BTN_NONE))
7432 return -EIO;
7433
7434 if (result != TP_EC_MUTE_BTN_NONE)
7435 pr_warn("Unexpected SAUM result %d\n",
7436 result);
7437
7438 /*
7439 * In software mute mode, the standard codec controls take
7440 * precendence, so we unmute the ThinkPad HW switch at
7441 * startup. Just on case there are SAUM-capable ThinkPads
7442 * with level controls, set max HW volume as well.
7443 */
7444 if (tp_features.mixer_no_level_control)
7445 result = volume_set_mute(false);
7446 else
7447 result = volume_set_status(TP_EC_VOLUME_MAX);
7448
7449 if (result != 0)
7450 pr_warn("Failed to unmute the HW mute switch\n");
7451
7452 return 0;
7453 }
7454
7455 static void volume_exit_software_mute(void)
7456 {
7457 int r;
7458
7459 if (!acpi_evalf(ec_handle, &r, "SAUM", "qdd", software_mute_orig_mode)
7460 || r != software_mute_orig_mode)
7461 pr_warn("Failed to restore mute mode\n");
7462 }
7463
7464 static int volume_alsa_set_volume(const u8 vol)
7465 {
7466 dbg_printk(TPACPI_DBG_MIXER,
7467 "ALSA: trying to set volume level to %hu\n", vol);
7468 return __volume_set_volume_ec(vol);
7469 }
7470
7471 static void volume_alsa_notify_change(void)
7472 {
7473 struct tpacpi_alsa_data *d;
7474
7475 if (alsa_card && alsa_card->private_data) {
7476 d = alsa_card->private_data;
7477 if (d->ctl_mute_id)
7478 snd_ctl_notify(alsa_card,
7479 SNDRV_CTL_EVENT_MASK_VALUE,
7480 d->ctl_mute_id);
7481 if (d->ctl_vol_id)
7482 snd_ctl_notify(alsa_card,
7483 SNDRV_CTL_EVENT_MASK_VALUE,
7484 d->ctl_vol_id);
7485 }
7486 }
7487
7488 static int volume_alsa_vol_info(struct snd_kcontrol *kcontrol,
7489 struct snd_ctl_elem_info *uinfo)
7490 {
7491 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
7492 uinfo->count = 1;
7493 uinfo->value.integer.min = 0;
7494 uinfo->value.integer.max = TP_EC_VOLUME_MAX;
7495 return 0;
7496 }
7497
7498 static int volume_alsa_vol_get(struct snd_kcontrol *kcontrol,
7499 struct snd_ctl_elem_value *ucontrol)
7500 {
7501 u8 s;
7502 int rc;
7503
7504 rc = volume_get_status(&s);
7505 if (rc < 0)
7506 return rc;
7507
7508 ucontrol->value.integer.value[0] = s & TP_EC_AUDIO_LVL_MSK;
7509 return 0;
7510 }
7511
7512 static int volume_alsa_vol_put(struct snd_kcontrol *kcontrol,
7513 struct snd_ctl_elem_value *ucontrol)
7514 {
7515 tpacpi_disclose_usertask("ALSA", "set volume to %ld\n",
7516 ucontrol->value.integer.value[0]);
7517 return volume_alsa_set_volume(ucontrol->value.integer.value[0]);
7518 }
7519
7520 #define volume_alsa_mute_info snd_ctl_boolean_mono_info
7521
7522 static int volume_alsa_mute_get(struct snd_kcontrol *kcontrol,
7523 struct snd_ctl_elem_value *ucontrol)
7524 {
7525 u8 s;
7526 int rc;
7527
7528 rc = volume_get_status(&s);
7529 if (rc < 0)
7530 return rc;
7531
7532 ucontrol->value.integer.value[0] =
7533 (s & TP_EC_AUDIO_MUTESW_MSK) ? 0 : 1;
7534 return 0;
7535 }
7536
7537 static int volume_alsa_mute_put(struct snd_kcontrol *kcontrol,
7538 struct snd_ctl_elem_value *ucontrol)
7539 {
7540 tpacpi_disclose_usertask("ALSA", "%smute\n",
7541 ucontrol->value.integer.value[0] ?
7542 "un" : "");
7543 return volume_alsa_set_mute(!ucontrol->value.integer.value[0]);
7544 }
7545
7546 static struct snd_kcontrol_new volume_alsa_control_vol __initdata = {
7547 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
7548 .name = "Console Playback Volume",
7549 .index = 0,
7550 .access = SNDRV_CTL_ELEM_ACCESS_READ,
7551 .info = volume_alsa_vol_info,
7552 .get = volume_alsa_vol_get,
7553 };
7554
7555 static struct snd_kcontrol_new volume_alsa_control_mute __initdata = {
7556 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
7557 .name = "Console Playback Switch",
7558 .index = 0,
7559 .access = SNDRV_CTL_ELEM_ACCESS_READ,
7560 .info = volume_alsa_mute_info,
7561 .get = volume_alsa_mute_get,
7562 };
7563
7564 static void volume_suspend(void)
7565 {
7566 tpacpi_volume_checkpoint_nvram();
7567 }
7568
7569 static void volume_resume(void)
7570 {
7571 if (software_mute_active) {
7572 if (volume_set_software_mute(false) < 0)
7573 pr_warn("Failed to restore software mute\n");
7574 } else {
7575 volume_alsa_notify_change();
7576 }
7577 }
7578
7579 static void volume_shutdown(void)
7580 {
7581 tpacpi_volume_checkpoint_nvram();
7582 }
7583
7584 static void volume_exit(void)
7585 {
7586 if (alsa_card) {
7587 snd_card_free(alsa_card);
7588 alsa_card = NULL;
7589 }
7590
7591 tpacpi_volume_checkpoint_nvram();
7592
7593 if (software_mute_active)
7594 volume_exit_software_mute();
7595 }
7596
7597 static int __init volume_create_alsa_mixer(void)
7598 {
7599 struct snd_card *card;
7600 struct tpacpi_alsa_data *data;
7601 struct snd_kcontrol *ctl_vol;
7602 struct snd_kcontrol *ctl_mute;
7603 int rc;
7604
7605 rc = snd_card_new(&tpacpi_pdev->dev,
7606 alsa_index, alsa_id, THIS_MODULE,
7607 sizeof(struct tpacpi_alsa_data), &card);
7608 if (rc < 0 || !card) {
7609 pr_err("Failed to create ALSA card structures: %d\n", rc);
7610 return 1;
7611 }
7612
7613 BUG_ON(!card->private_data);
7614 data = card->private_data;
7615 data->card = card;
7616
7617 strlcpy(card->driver, TPACPI_ALSA_DRVNAME,
7618 sizeof(card->driver));
7619 strlcpy(card->shortname, TPACPI_ALSA_SHRTNAME,
7620 sizeof(card->shortname));
7621 snprintf(card->mixername, sizeof(card->mixername), "ThinkPad EC %s",
7622 (thinkpad_id.ec_version_str) ?
7623 thinkpad_id.ec_version_str : "(unknown)");
7624 snprintf(card->longname, sizeof(card->longname),
7625 "%s at EC reg 0x%02x, fw %s", card->shortname, TP_EC_AUDIO,
7626 (thinkpad_id.ec_version_str) ?
7627 thinkpad_id.ec_version_str : "unknown");
7628
7629 if (volume_control_allowed) {
7630 volume_alsa_control_vol.put = volume_alsa_vol_put;
7631 volume_alsa_control_vol.access =
7632 SNDRV_CTL_ELEM_ACCESS_READWRITE;
7633
7634 volume_alsa_control_mute.put = volume_alsa_mute_put;
7635 volume_alsa_control_mute.access =
7636 SNDRV_CTL_ELEM_ACCESS_READWRITE;
7637 }
7638
7639 if (!tp_features.mixer_no_level_control) {
7640 ctl_vol = snd_ctl_new1(&volume_alsa_control_vol, NULL);
7641 rc = snd_ctl_add(card, ctl_vol);
7642 if (rc < 0) {
7643 pr_err("Failed to create ALSA volume control: %d\n",
7644 rc);
7645 goto err_exit;
7646 }
7647 data->ctl_vol_id = &ctl_vol->id;
7648 }
7649
7650 ctl_mute = snd_ctl_new1(&volume_alsa_control_mute, NULL);
7651 rc = snd_ctl_add(card, ctl_mute);
7652 if (rc < 0) {
7653 pr_err("Failed to create ALSA mute control: %d\n", rc);
7654 goto err_exit;
7655 }
7656 data->ctl_mute_id = &ctl_mute->id;
7657
7658 rc = snd_card_register(card);
7659 if (rc < 0) {
7660 pr_err("Failed to register ALSA card: %d\n", rc);
7661 goto err_exit;
7662 }
7663
7664 alsa_card = card;
7665 return 0;
7666
7667 err_exit:
7668 snd_card_free(card);
7669 return 1;
7670 }
7671
7672 #define TPACPI_VOL_Q_MUTEONLY 0x0001 /* Mute-only control available */
7673 #define TPACPI_VOL_Q_LEVEL 0x0002 /* Volume control available */
7674
7675 static const struct tpacpi_quirk volume_quirk_table[] __initconst = {
7676 /* Whitelist volume level on all IBM by default */
7677 { .vendor = PCI_VENDOR_ID_IBM,
7678 .bios = TPACPI_MATCH_ANY,
7679 .ec = TPACPI_MATCH_ANY,
7680 .quirks = TPACPI_VOL_Q_LEVEL },
7681
7682 /* Lenovo models with volume control (needs confirmation) */
7683 TPACPI_QEC_LNV('7', 'C', TPACPI_VOL_Q_LEVEL), /* R60/i */
7684 TPACPI_QEC_LNV('7', 'E', TPACPI_VOL_Q_LEVEL), /* R60e/i */
7685 TPACPI_QEC_LNV('7', '9', TPACPI_VOL_Q_LEVEL), /* T60/p */
7686 TPACPI_QEC_LNV('7', 'B', TPACPI_VOL_Q_LEVEL), /* X60/s */
7687 TPACPI_QEC_LNV('7', 'J', TPACPI_VOL_Q_LEVEL), /* X60t */
7688 TPACPI_QEC_LNV('7', '7', TPACPI_VOL_Q_LEVEL), /* Z60 */
7689 TPACPI_QEC_LNV('7', 'F', TPACPI_VOL_Q_LEVEL), /* Z61 */
7690
7691 /* Whitelist mute-only on all Lenovo by default */
7692 { .vendor = PCI_VENDOR_ID_LENOVO,
7693 .bios = TPACPI_MATCH_ANY,
7694 .ec = TPACPI_MATCH_ANY,
7695 .quirks = TPACPI_VOL_Q_MUTEONLY }
7696 };
7697
7698 static int __init volume_init(struct ibm_init_struct *iibm)
7699 {
7700 unsigned long quirks;
7701 int rc;
7702
7703 vdbg_printk(TPACPI_DBG_INIT, "initializing volume subdriver\n");
7704
7705 mutex_init(&volume_mutex);
7706
7707 /*
7708 * Check for module parameter bogosity, note that we
7709 * init volume_mode to TPACPI_VOL_MODE_MAX in order to be
7710 * able to detect "unspecified"
7711 */
7712 if (volume_mode > TPACPI_VOL_MODE_MAX)
7713 return -EINVAL;
7714
7715 if (volume_mode == TPACPI_VOL_MODE_UCMS_STEP) {
7716 pr_err("UCMS step volume mode not implemented, please contact %s\n",
7717 TPACPI_MAIL);
7718 return 1;
7719 }
7720
7721 if (volume_capabilities >= TPACPI_VOL_CAP_MAX)
7722 return -EINVAL;
7723
7724 /*
7725 * The ALSA mixer is our primary interface.
7726 * When disabled, don't install the subdriver at all
7727 */
7728 if (!alsa_enable) {
7729 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
7730 "ALSA mixer disabled by parameter, not loading volume subdriver...\n");
7731 return 1;
7732 }
7733
7734 quirks = tpacpi_check_quirks(volume_quirk_table,
7735 ARRAY_SIZE(volume_quirk_table));
7736
7737 switch (volume_capabilities) {
7738 case TPACPI_VOL_CAP_AUTO:
7739 if (quirks & TPACPI_VOL_Q_MUTEONLY)
7740 tp_features.mixer_no_level_control = 1;
7741 else if (quirks & TPACPI_VOL_Q_LEVEL)
7742 tp_features.mixer_no_level_control = 0;
7743 else
7744 return 1; /* no mixer */
7745 break;
7746 case TPACPI_VOL_CAP_VOLMUTE:
7747 tp_features.mixer_no_level_control = 0;
7748 break;
7749 case TPACPI_VOL_CAP_MUTEONLY:
7750 tp_features.mixer_no_level_control = 1;
7751 break;
7752 default:
7753 return 1;
7754 }
7755
7756 if (volume_capabilities != TPACPI_VOL_CAP_AUTO)
7757 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
7758 "using user-supplied volume_capabilities=%d\n",
7759 volume_capabilities);
7760
7761 if (volume_mode == TPACPI_VOL_MODE_AUTO ||
7762 volume_mode == TPACPI_VOL_MODE_MAX) {
7763 volume_mode = TPACPI_VOL_MODE_ECNVRAM;
7764
7765 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
7766 "driver auto-selected volume_mode=%d\n",
7767 volume_mode);
7768 } else {
7769 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
7770 "using user-supplied volume_mode=%d\n",
7771 volume_mode);
7772 }
7773
7774 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
7775 "mute is supported, volume control is %s\n",
7776 str_supported(!tp_features.mixer_no_level_control));
7777
7778 if (software_mute_requested && volume_set_software_mute(true) == 0) {
7779 software_mute_active = true;
7780 } else {
7781 rc = volume_create_alsa_mixer();
7782 if (rc) {
7783 pr_err("Could not create the ALSA mixer interface\n");
7784 return rc;
7785 }
7786
7787 pr_info("Console audio control enabled, mode: %s\n",
7788 (volume_control_allowed) ?
7789 "override (read/write)" :
7790 "monitor (read only)");
7791 }
7792
7793 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
7794 "registering volume hotkeys as change notification\n");
7795 tpacpi_hotkey_driver_mask_set(hotkey_driver_mask
7796 | TP_ACPI_HKEY_VOLUP_MASK
7797 | TP_ACPI_HKEY_VOLDWN_MASK
7798 | TP_ACPI_HKEY_MUTE_MASK);
7799
7800 return 0;
7801 }
7802
7803 static int volume_read(struct seq_file *m)
7804 {
7805 u8 status;
7806
7807 if (volume_get_status(&status) < 0) {
7808 seq_printf(m, "level:\t\tunreadable\n");
7809 } else {
7810 if (tp_features.mixer_no_level_control)
7811 seq_printf(m, "level:\t\tunsupported\n");
7812 else
7813 seq_printf(m, "level:\t\t%d\n",
7814 status & TP_EC_AUDIO_LVL_MSK);
7815
7816 seq_printf(m, "mute:\t\t%s\n",
7817 onoff(status, TP_EC_AUDIO_MUTESW));
7818
7819 if (volume_control_allowed) {
7820 seq_printf(m, "commands:\tunmute, mute\n");
7821 if (!tp_features.mixer_no_level_control) {
7822 seq_printf(m, "commands:\tup, down\n");
7823 seq_printf(m, "commands:\tlevel <level> (<level> is 0-%d)\n",
7824 TP_EC_VOLUME_MAX);
7825 }
7826 }
7827 }
7828
7829 return 0;
7830 }
7831
7832 static int volume_write(char *buf)
7833 {
7834 u8 s;
7835 u8 new_level, new_mute;
7836 int l;
7837 char *cmd;
7838 int rc;
7839
7840 /*
7841 * We do allow volume control at driver startup, so that the
7842 * user can set initial state through the volume=... parameter hack.
7843 */
7844 if (!volume_control_allowed && tpacpi_lifecycle != TPACPI_LIFE_INIT) {
7845 if (unlikely(!tp_warned.volume_ctrl_forbidden)) {
7846 tp_warned.volume_ctrl_forbidden = 1;
7847 pr_notice("Console audio control in monitor mode, changes are not allowed\n");
7848 pr_notice("Use the volume_control=1 module parameter to enable volume control\n");
7849 }
7850 return -EPERM;
7851 }
7852
7853 rc = volume_get_status(&s);
7854 if (rc < 0)
7855 return rc;
7856
7857 new_level = s & TP_EC_AUDIO_LVL_MSK;
7858 new_mute = s & TP_EC_AUDIO_MUTESW_MSK;
7859
7860 while ((cmd = strsep(&buf, ","))) {
7861 if (!tp_features.mixer_no_level_control) {
7862 if (strlencmp(cmd, "up") == 0) {
7863 if (new_mute)
7864 new_mute = 0;
7865 else if (new_level < TP_EC_VOLUME_MAX)
7866 new_level++;
7867 continue;
7868 } else if (strlencmp(cmd, "down") == 0) {
7869 if (new_mute)
7870 new_mute = 0;
7871 else if (new_level > 0)
7872 new_level--;
7873 continue;
7874 } else if (sscanf(cmd, "level %u", &l) == 1 &&
7875 l >= 0 && l <= TP_EC_VOLUME_MAX) {
7876 new_level = l;
7877 continue;
7878 }
7879 }
7880 if (strlencmp(cmd, "mute") == 0)
7881 new_mute = TP_EC_AUDIO_MUTESW_MSK;
7882 else if (strlencmp(cmd, "unmute") == 0)
7883 new_mute = 0;
7884 else
7885 return -EINVAL;
7886 }
7887
7888 if (tp_features.mixer_no_level_control) {
7889 tpacpi_disclose_usertask("procfs volume", "%smute\n",
7890 new_mute ? "" : "un");
7891 rc = volume_set_mute(!!new_mute);
7892 } else {
7893 tpacpi_disclose_usertask("procfs volume",
7894 "%smute and set level to %d\n",
7895 new_mute ? "" : "un", new_level);
7896 rc = volume_set_status(new_mute | new_level);
7897 }
7898 volume_alsa_notify_change();
7899
7900 return (rc == -EINTR) ? -ERESTARTSYS : rc;
7901 }
7902
7903 static struct ibm_struct volume_driver_data = {
7904 .name = "volume",
7905 .read = volume_read,
7906 .write = volume_write,
7907 .exit = volume_exit,
7908 .suspend = volume_suspend,
7909 .resume = volume_resume,
7910 .shutdown = volume_shutdown,
7911 };
7912
7913 #else /* !CONFIG_THINKPAD_ACPI_ALSA_SUPPORT */
7914
7915 #define alsa_card NULL
7916
7917 static inline void volume_alsa_notify_change(void)
7918 {
7919 }
7920
7921 static int __init volume_init(struct ibm_init_struct *iibm)
7922 {
7923 pr_info("volume: disabled as there is no ALSA support in this kernel\n");
7924
7925 return 1;
7926 }
7927
7928 static struct ibm_struct volume_driver_data = {
7929 .name = "volume",
7930 };
7931
7932 #endif /* CONFIG_THINKPAD_ACPI_ALSA_SUPPORT */
7933
7934 /*************************************************************************
7935 * Fan subdriver
7936 */
7937
7938 /*
7939 * FAN ACCESS MODES
7940 *
7941 * TPACPI_FAN_RD_ACPI_GFAN:
7942 * ACPI GFAN method: returns fan level
7943 *
7944 * see TPACPI_FAN_WR_ACPI_SFAN
7945 * EC 0x2f (HFSP) not available if GFAN exists
7946 *
7947 * TPACPI_FAN_WR_ACPI_SFAN:
7948 * ACPI SFAN method: sets fan level, 0 (stop) to 7 (max)
7949 *
7950 * EC 0x2f (HFSP) might be available *for reading*, but do not use
7951 * it for writing.
7952 *
7953 * TPACPI_FAN_WR_TPEC:
7954 * ThinkPad EC register 0x2f (HFSP): fan control loop mode
7955 * Supported on almost all ThinkPads
7956 *
7957 * Fan speed changes of any sort (including those caused by the
7958 * disengaged mode) are usually done slowly by the firmware as the
7959 * maximum amount of fan duty cycle change per second seems to be
7960 * limited.
7961 *
7962 * Reading is not available if GFAN exists.
7963 * Writing is not available if SFAN exists.
7964 *
7965 * Bits
7966 * 7 automatic mode engaged;
7967 * (default operation mode of the ThinkPad)
7968 * fan level is ignored in this mode.
7969 * 6 full speed mode (takes precedence over bit 7);
7970 * not available on all thinkpads. May disable
7971 * the tachometer while the fan controller ramps up
7972 * the speed (which can take up to a few *minutes*).
7973 * Speeds up fan to 100% duty-cycle, which is far above
7974 * the standard RPM levels. It is not impossible that
7975 * it could cause hardware damage.
7976 * 5-3 unused in some models. Extra bits for fan level
7977 * in others, but still useless as all values above
7978 * 7 map to the same speed as level 7 in these models.
7979 * 2-0 fan level (0..7 usually)
7980 * 0x00 = stop
7981 * 0x07 = max (set when temperatures critical)
7982 * Some ThinkPads may have other levels, see
7983 * TPACPI_FAN_WR_ACPI_FANS (X31/X40/X41)
7984 *
7985 * FIRMWARE BUG: on some models, EC 0x2f might not be initialized at
7986 * boot. Apparently the EC does not initialize it, so unless ACPI DSDT
7987 * does so, its initial value is meaningless (0x07).
7988 *
7989 * For firmware bugs, refer to:
7990 * https://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
7991 *
7992 * ----
7993 *
7994 * ThinkPad EC register 0x84 (LSB), 0x85 (MSB):
7995 * Main fan tachometer reading (in RPM)
7996 *
7997 * This register is present on all ThinkPads with a new-style EC, and
7998 * it is known not to be present on the A21m/e, and T22, as there is
7999 * something else in offset 0x84 according to the ACPI DSDT. Other
8000 * ThinkPads from this same time period (and earlier) probably lack the
8001 * tachometer as well.
8002 *
8003 * Unfortunately a lot of ThinkPads with new-style ECs but whose firmware
8004 * was never fixed by IBM to report the EC firmware version string
8005 * probably support the tachometer (like the early X models), so
8006 * detecting it is quite hard. We need more data to know for sure.
8007 *
8008 * FIRMWARE BUG: always read 0x84 first, otherwise incorrect readings
8009 * might result.
8010 *
8011 * FIRMWARE BUG: may go stale while the EC is switching to full speed
8012 * mode.
8013 *
8014 * For firmware bugs, refer to:
8015 * https://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
8016 *
8017 * ----
8018 *
8019 * ThinkPad EC register 0x31 bit 0 (only on select models)
8020 *
8021 * When bit 0 of EC register 0x31 is zero, the tachometer registers
8022 * show the speed of the main fan. When bit 0 of EC register 0x31
8023 * is one, the tachometer registers show the speed of the auxiliary
8024 * fan.
8025 *
8026 * Fan control seems to affect both fans, regardless of the state
8027 * of this bit.
8028 *
8029 * So far, only the firmware for the X60/X61 non-tablet versions
8030 * seem to support this (firmware TP-7M).
8031 *
8032 * TPACPI_FAN_WR_ACPI_FANS:
8033 * ThinkPad X31, X40, X41. Not available in the X60.
8034 *
8035 * FANS ACPI handle: takes three arguments: low speed, medium speed,
8036 * high speed. ACPI DSDT seems to map these three speeds to levels
8037 * as follows: STOP LOW LOW MED MED HIGH HIGH HIGH HIGH
8038 * (this map is stored on FAN0..FAN8 as "0,1,1,2,2,3,3,3,3")
8039 *
8040 * The speeds are stored on handles
8041 * (FANA:FAN9), (FANC:FANB), (FANE:FAND).
8042 *
8043 * There are three default speed sets, accessible as handles:
8044 * FS1L,FS1M,FS1H; FS2L,FS2M,FS2H; FS3L,FS3M,FS3H
8045 *
8046 * ACPI DSDT switches which set is in use depending on various
8047 * factors.
8048 *
8049 * TPACPI_FAN_WR_TPEC is also available and should be used to
8050 * command the fan. The X31/X40/X41 seems to have 8 fan levels,
8051 * but the ACPI tables just mention level 7.
8052 */
8053
8054 enum { /* Fan control constants */
8055 fan_status_offset = 0x2f, /* EC register 0x2f */
8056 fan_rpm_offset = 0x84, /* EC register 0x84: LSB, 0x85 MSB (RPM)
8057 * 0x84 must be read before 0x85 */
8058 fan_select_offset = 0x31, /* EC register 0x31 (Firmware 7M)
8059 bit 0 selects which fan is active */
8060
8061 TP_EC_FAN_FULLSPEED = 0x40, /* EC fan mode: full speed */
8062 TP_EC_FAN_AUTO = 0x80, /* EC fan mode: auto fan control */
8063
8064 TPACPI_FAN_LAST_LEVEL = 0x100, /* Use cached last-seen fan level */
8065 };
8066
8067 enum fan_status_access_mode {
8068 TPACPI_FAN_NONE = 0, /* No fan status or control */
8069 TPACPI_FAN_RD_ACPI_GFAN, /* Use ACPI GFAN */
8070 TPACPI_FAN_RD_TPEC, /* Use ACPI EC regs 0x2f, 0x84-0x85 */
8071 };
8072
8073 enum fan_control_access_mode {
8074 TPACPI_FAN_WR_NONE = 0, /* No fan control */
8075 TPACPI_FAN_WR_ACPI_SFAN, /* Use ACPI SFAN */
8076 TPACPI_FAN_WR_TPEC, /* Use ACPI EC reg 0x2f */
8077 TPACPI_FAN_WR_ACPI_FANS, /* Use ACPI FANS and EC reg 0x2f */
8078 };
8079
8080 enum fan_control_commands {
8081 TPACPI_FAN_CMD_SPEED = 0x0001, /* speed command */
8082 TPACPI_FAN_CMD_LEVEL = 0x0002, /* level command */
8083 TPACPI_FAN_CMD_ENABLE = 0x0004, /* enable/disable cmd,
8084 * and also watchdog cmd */
8085 };
8086
8087 static bool fan_control_allowed;
8088
8089 static enum fan_status_access_mode fan_status_access_mode;
8090 static enum fan_control_access_mode fan_control_access_mode;
8091 static enum fan_control_commands fan_control_commands;
8092
8093 static u8 fan_control_initial_status;
8094 static u8 fan_control_desired_level;
8095 static u8 fan_control_resume_level;
8096 static int fan_watchdog_maxinterval;
8097
8098 static struct mutex fan_mutex;
8099
8100 static void fan_watchdog_fire(struct work_struct *ignored);
8101 static DECLARE_DELAYED_WORK(fan_watchdog_task, fan_watchdog_fire);
8102
8103 TPACPI_HANDLE(fans, ec, "FANS"); /* X31, X40, X41 */
8104 TPACPI_HANDLE(gfan, ec, "GFAN", /* 570 */
8105 "\\FSPD", /* 600e/x, 770e, 770x */
8106 ); /* all others */
8107 TPACPI_HANDLE(sfan, ec, "SFAN", /* 570 */
8108 "JFNS", /* 770x-JL */
8109 ); /* all others */
8110
8111 /*
8112 * Unitialized HFSP quirk: ACPI DSDT and EC fail to initialize the
8113 * HFSP register at boot, so it contains 0x07 but the Thinkpad could
8114 * be in auto mode (0x80).
8115 *
8116 * This is corrected by any write to HFSP either by the driver, or
8117 * by the firmware.
8118 *
8119 * We assume 0x07 really means auto mode while this quirk is active,
8120 * as this is far more likely than the ThinkPad being in level 7,
8121 * which is only used by the firmware during thermal emergencies.
8122 *
8123 * Enable for TP-1Y (T43), TP-78 (R51e), TP-76 (R52),
8124 * TP-70 (T43, R52), which are known to be buggy.
8125 */
8126
8127 static void fan_quirk1_setup(void)
8128 {
8129 if (fan_control_initial_status == 0x07) {
8130 pr_notice("fan_init: initial fan status is unknown, assuming it is in auto mode\n");
8131 tp_features.fan_ctrl_status_undef = 1;
8132 }
8133 }
8134
8135 static void fan_quirk1_handle(u8 *fan_status)
8136 {
8137 if (unlikely(tp_features.fan_ctrl_status_undef)) {
8138 if (*fan_status != fan_control_initial_status) {
8139 /* something changed the HFSP regisnter since
8140 * driver init time, so it is not undefined
8141 * anymore */
8142 tp_features.fan_ctrl_status_undef = 0;
8143 } else {
8144 /* Return most likely status. In fact, it
8145 * might be the only possible status */
8146 *fan_status = TP_EC_FAN_AUTO;
8147 }
8148 }
8149 }
8150
8151 /* Select main fan on X60/X61, NOOP on others */
8152 static bool fan_select_fan1(void)
8153 {
8154 if (tp_features.second_fan) {
8155 u8 val;
8156
8157 if (ec_read(fan_select_offset, &val) < 0)
8158 return false;
8159 val &= 0xFEU;
8160 if (ec_write(fan_select_offset, val) < 0)
8161 return false;
8162 }
8163 return true;
8164 }
8165
8166 /* Select secondary fan on X60/X61 */
8167 static bool fan_select_fan2(void)
8168 {
8169 u8 val;
8170
8171 if (!tp_features.second_fan)
8172 return false;
8173
8174 if (ec_read(fan_select_offset, &val) < 0)
8175 return false;
8176 val |= 0x01U;
8177 if (ec_write(fan_select_offset, val) < 0)
8178 return false;
8179
8180 return true;
8181 }
8182
8183 /*
8184 * Call with fan_mutex held
8185 */
8186 static void fan_update_desired_level(u8 status)
8187 {
8188 if ((status &
8189 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
8190 if (status > 7)
8191 fan_control_desired_level = 7;
8192 else
8193 fan_control_desired_level = status;
8194 }
8195 }
8196
8197 static int fan_get_status(u8 *status)
8198 {
8199 u8 s;
8200
8201 /* TODO:
8202 * Add TPACPI_FAN_RD_ACPI_FANS ? */
8203
8204 switch (fan_status_access_mode) {
8205 case TPACPI_FAN_RD_ACPI_GFAN: {
8206 /* 570, 600e/x, 770e, 770x */
8207 int res;
8208
8209 if (unlikely(!acpi_evalf(gfan_handle, &res, NULL, "d")))
8210 return -EIO;
8211
8212 if (likely(status))
8213 *status = res & 0x07;
8214
8215 break;
8216 }
8217 case TPACPI_FAN_RD_TPEC:
8218 /* all except 570, 600e/x, 770e, 770x */
8219 if (unlikely(!acpi_ec_read(fan_status_offset, &s)))
8220 return -EIO;
8221
8222 if (likely(status)) {
8223 *status = s;
8224 fan_quirk1_handle(status);
8225 }
8226
8227 break;
8228
8229 default:
8230 return -ENXIO;
8231 }
8232
8233 return 0;
8234 }
8235
8236 static int fan_get_status_safe(u8 *status)
8237 {
8238 int rc;
8239 u8 s;
8240
8241 if (mutex_lock_killable(&fan_mutex))
8242 return -ERESTARTSYS;
8243 rc = fan_get_status(&s);
8244 if (!rc)
8245 fan_update_desired_level(s);
8246 mutex_unlock(&fan_mutex);
8247
8248 if (rc)
8249 return rc;
8250 if (status)
8251 *status = s;
8252
8253 return 0;
8254 }
8255
8256 static int fan_get_speed(unsigned int *speed)
8257 {
8258 u8 hi, lo;
8259
8260 switch (fan_status_access_mode) {
8261 case TPACPI_FAN_RD_TPEC:
8262 /* all except 570, 600e/x, 770e, 770x */
8263 if (unlikely(!fan_select_fan1()))
8264 return -EIO;
8265 if (unlikely(!acpi_ec_read(fan_rpm_offset, &lo) ||
8266 !acpi_ec_read(fan_rpm_offset + 1, &hi)))
8267 return -EIO;
8268
8269 if (likely(speed))
8270 *speed = (hi << 8) | lo;
8271
8272 break;
8273
8274 default:
8275 return -ENXIO;
8276 }
8277
8278 return 0;
8279 }
8280
8281 static int fan2_get_speed(unsigned int *speed)
8282 {
8283 u8 hi, lo;
8284 bool rc;
8285
8286 switch (fan_status_access_mode) {
8287 case TPACPI_FAN_RD_TPEC:
8288 /* all except 570, 600e/x, 770e, 770x */
8289 if (unlikely(!fan_select_fan2()))
8290 return -EIO;
8291 rc = !acpi_ec_read(fan_rpm_offset, &lo) ||
8292 !acpi_ec_read(fan_rpm_offset + 1, &hi);
8293 fan_select_fan1(); /* play it safe */
8294 if (rc)
8295 return -EIO;
8296
8297 if (likely(speed))
8298 *speed = (hi << 8) | lo;
8299
8300 break;
8301
8302 default:
8303 return -ENXIO;
8304 }
8305
8306 return 0;
8307 }
8308
8309 static int fan_set_level(int level)
8310 {
8311 if (!fan_control_allowed)
8312 return -EPERM;
8313
8314 switch (fan_control_access_mode) {
8315 case TPACPI_FAN_WR_ACPI_SFAN:
8316 if ((level < 0) || (level > 7))
8317 return -EINVAL;
8318
8319 if (tp_features.second_fan_ctl) {
8320 if (!fan_select_fan2() ||
8321 !acpi_evalf(sfan_handle, NULL, NULL, "vd", level)) {
8322 pr_warn("Couldn't set 2nd fan level, disabling support\n");
8323 tp_features.second_fan_ctl = 0;
8324 }
8325 fan_select_fan1();
8326 }
8327 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", level))
8328 return -EIO;
8329 break;
8330
8331 case TPACPI_FAN_WR_ACPI_FANS:
8332 case TPACPI_FAN_WR_TPEC:
8333 if (!(level & TP_EC_FAN_AUTO) &&
8334 !(level & TP_EC_FAN_FULLSPEED) &&
8335 ((level < 0) || (level > 7)))
8336 return -EINVAL;
8337
8338 /* safety net should the EC not support AUTO
8339 * or FULLSPEED mode bits and just ignore them */
8340 if (level & TP_EC_FAN_FULLSPEED)
8341 level |= 7; /* safety min speed 7 */
8342 else if (level & TP_EC_FAN_AUTO)
8343 level |= 4; /* safety min speed 4 */
8344
8345 if (tp_features.second_fan_ctl) {
8346 if (!fan_select_fan2() ||
8347 !acpi_ec_write(fan_status_offset, level)) {
8348 pr_warn("Couldn't set 2nd fan level, disabling support\n");
8349 tp_features.second_fan_ctl = 0;
8350 }
8351 fan_select_fan1();
8352
8353 }
8354 if (!acpi_ec_write(fan_status_offset, level))
8355 return -EIO;
8356 else
8357 tp_features.fan_ctrl_status_undef = 0;
8358 break;
8359
8360 default:
8361 return -ENXIO;
8362 }
8363
8364 vdbg_printk(TPACPI_DBG_FAN,
8365 "fan control: set fan control register to 0x%02x\n", level);
8366 return 0;
8367 }
8368
8369 static int fan_set_level_safe(int level)
8370 {
8371 int rc;
8372
8373 if (!fan_control_allowed)
8374 return -EPERM;
8375
8376 if (mutex_lock_killable(&fan_mutex))
8377 return -ERESTARTSYS;
8378
8379 if (level == TPACPI_FAN_LAST_LEVEL)
8380 level = fan_control_desired_level;
8381
8382 rc = fan_set_level(level);
8383 if (!rc)
8384 fan_update_desired_level(level);
8385
8386 mutex_unlock(&fan_mutex);
8387 return rc;
8388 }
8389
8390 static int fan_set_enable(void)
8391 {
8392 u8 s;
8393 int rc;
8394
8395 if (!fan_control_allowed)
8396 return -EPERM;
8397
8398 if (mutex_lock_killable(&fan_mutex))
8399 return -ERESTARTSYS;
8400
8401 switch (fan_control_access_mode) {
8402 case TPACPI_FAN_WR_ACPI_FANS:
8403 case TPACPI_FAN_WR_TPEC:
8404 rc = fan_get_status(&s);
8405 if (rc < 0)
8406 break;
8407
8408 /* Don't go out of emergency fan mode */
8409 if (s != 7) {
8410 s &= 0x07;
8411 s |= TP_EC_FAN_AUTO | 4; /* min fan speed 4 */
8412 }
8413
8414 if (!acpi_ec_write(fan_status_offset, s))
8415 rc = -EIO;
8416 else {
8417 tp_features.fan_ctrl_status_undef = 0;
8418 rc = 0;
8419 }
8420 break;
8421
8422 case TPACPI_FAN_WR_ACPI_SFAN:
8423 rc = fan_get_status(&s);
8424 if (rc < 0)
8425 break;
8426
8427 s &= 0x07;
8428
8429 /* Set fan to at least level 4 */
8430 s |= 4;
8431
8432 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", s))
8433 rc = -EIO;
8434 else
8435 rc = 0;
8436 break;
8437
8438 default:
8439 rc = -ENXIO;
8440 }
8441
8442 mutex_unlock(&fan_mutex);
8443
8444 if (!rc)
8445 vdbg_printk(TPACPI_DBG_FAN,
8446 "fan control: set fan control register to 0x%02x\n",
8447 s);
8448 return rc;
8449 }
8450
8451 static int fan_set_disable(void)
8452 {
8453 int rc;
8454
8455 if (!fan_control_allowed)
8456 return -EPERM;
8457
8458 if (mutex_lock_killable(&fan_mutex))
8459 return -ERESTARTSYS;
8460
8461 rc = 0;
8462 switch (fan_control_access_mode) {
8463 case TPACPI_FAN_WR_ACPI_FANS:
8464 case TPACPI_FAN_WR_TPEC:
8465 if (!acpi_ec_write(fan_status_offset, 0x00))
8466 rc = -EIO;
8467 else {
8468 fan_control_desired_level = 0;
8469 tp_features.fan_ctrl_status_undef = 0;
8470 }
8471 break;
8472
8473 case TPACPI_FAN_WR_ACPI_SFAN:
8474 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", 0x00))
8475 rc = -EIO;
8476 else
8477 fan_control_desired_level = 0;
8478 break;
8479
8480 default:
8481 rc = -ENXIO;
8482 }
8483
8484 if (!rc)
8485 vdbg_printk(TPACPI_DBG_FAN,
8486 "fan control: set fan control register to 0\n");
8487
8488 mutex_unlock(&fan_mutex);
8489 return rc;
8490 }
8491
8492 static int fan_set_speed(int speed)
8493 {
8494 int rc;
8495
8496 if (!fan_control_allowed)
8497 return -EPERM;
8498
8499 if (mutex_lock_killable(&fan_mutex))
8500 return -ERESTARTSYS;
8501
8502 rc = 0;
8503 switch (fan_control_access_mode) {
8504 case TPACPI_FAN_WR_ACPI_FANS:
8505 if (speed >= 0 && speed <= 65535) {
8506 if (!acpi_evalf(fans_handle, NULL, NULL, "vddd",
8507 speed, speed, speed))
8508 rc = -EIO;
8509 } else
8510 rc = -EINVAL;
8511 break;
8512
8513 default:
8514 rc = -ENXIO;
8515 }
8516
8517 mutex_unlock(&fan_mutex);
8518 return rc;
8519 }
8520
8521 static void fan_watchdog_reset(void)
8522 {
8523 if (fan_control_access_mode == TPACPI_FAN_WR_NONE)
8524 return;
8525
8526 if (fan_watchdog_maxinterval > 0 &&
8527 tpacpi_lifecycle != TPACPI_LIFE_EXITING)
8528 mod_delayed_work(tpacpi_wq, &fan_watchdog_task,
8529 msecs_to_jiffies(fan_watchdog_maxinterval * 1000));
8530 else
8531 cancel_delayed_work(&fan_watchdog_task);
8532 }
8533
8534 static void fan_watchdog_fire(struct work_struct *ignored)
8535 {
8536 int rc;
8537
8538 if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
8539 return;
8540
8541 pr_notice("fan watchdog: enabling fan\n");
8542 rc = fan_set_enable();
8543 if (rc < 0) {
8544 pr_err("fan watchdog: error %d while enabling fan, will try again later...\n",
8545 rc);
8546 /* reschedule for later */
8547 fan_watchdog_reset();
8548 }
8549 }
8550
8551 /*
8552 * SYSFS fan layout: hwmon compatible (device)
8553 *
8554 * pwm*_enable:
8555 * 0: "disengaged" mode
8556 * 1: manual mode
8557 * 2: native EC "auto" mode (recommended, hardware default)
8558 *
8559 * pwm*: set speed in manual mode, ignored otherwise.
8560 * 0 is level 0; 255 is level 7. Intermediate points done with linear
8561 * interpolation.
8562 *
8563 * fan*_input: tachometer reading, RPM
8564 *
8565 *
8566 * SYSFS fan layout: extensions
8567 *
8568 * fan_watchdog (driver):
8569 * fan watchdog interval in seconds, 0 disables (default), max 120
8570 */
8571
8572 /* sysfs fan pwm1_enable ----------------------------------------------- */
8573 static ssize_t fan_pwm1_enable_show(struct device *dev,
8574 struct device_attribute *attr,
8575 char *buf)
8576 {
8577 int res, mode;
8578 u8 status;
8579
8580 res = fan_get_status_safe(&status);
8581 if (res)
8582 return res;
8583
8584 if (status & TP_EC_FAN_FULLSPEED) {
8585 mode = 0;
8586 } else if (status & TP_EC_FAN_AUTO) {
8587 mode = 2;
8588 } else
8589 mode = 1;
8590
8591 return snprintf(buf, PAGE_SIZE, "%d\n", mode);
8592 }
8593
8594 static ssize_t fan_pwm1_enable_store(struct device *dev,
8595 struct device_attribute *attr,
8596 const char *buf, size_t count)
8597 {
8598 unsigned long t;
8599 int res, level;
8600
8601 if (parse_strtoul(buf, 2, &t))
8602 return -EINVAL;
8603
8604 tpacpi_disclose_usertask("hwmon pwm1_enable",
8605 "set fan mode to %lu\n", t);
8606
8607 switch (t) {
8608 case 0:
8609 level = TP_EC_FAN_FULLSPEED;
8610 break;
8611 case 1:
8612 level = TPACPI_FAN_LAST_LEVEL;
8613 break;
8614 case 2:
8615 level = TP_EC_FAN_AUTO;
8616 break;
8617 case 3:
8618 /* reserved for software-controlled auto mode */
8619 return -ENOSYS;
8620 default:
8621 return -EINVAL;
8622 }
8623
8624 res = fan_set_level_safe(level);
8625 if (res == -ENXIO)
8626 return -EINVAL;
8627 else if (res < 0)
8628 return res;
8629
8630 fan_watchdog_reset();
8631
8632 return count;
8633 }
8634
8635 static DEVICE_ATTR(pwm1_enable, S_IWUSR | S_IRUGO,
8636 fan_pwm1_enable_show, fan_pwm1_enable_store);
8637
8638 /* sysfs fan pwm1 ------------------------------------------------------ */
8639 static ssize_t fan_pwm1_show(struct device *dev,
8640 struct device_attribute *attr,
8641 char *buf)
8642 {
8643 int res;
8644 u8 status;
8645
8646 res = fan_get_status_safe(&status);
8647 if (res)
8648 return res;
8649
8650 if ((status &
8651 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) != 0)
8652 status = fan_control_desired_level;
8653
8654 if (status > 7)
8655 status = 7;
8656
8657 return snprintf(buf, PAGE_SIZE, "%u\n", (status * 255) / 7);
8658 }
8659
8660 static ssize_t fan_pwm1_store(struct device *dev,
8661 struct device_attribute *attr,
8662 const char *buf, size_t count)
8663 {
8664 unsigned long s;
8665 int rc;
8666 u8 status, newlevel;
8667
8668 if (parse_strtoul(buf, 255, &s))
8669 return -EINVAL;
8670
8671 tpacpi_disclose_usertask("hwmon pwm1",
8672 "set fan speed to %lu\n", s);
8673
8674 /* scale down from 0-255 to 0-7 */
8675 newlevel = (s >> 5) & 0x07;
8676
8677 if (mutex_lock_killable(&fan_mutex))
8678 return -ERESTARTSYS;
8679
8680 rc = fan_get_status(&status);
8681 if (!rc && (status &
8682 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
8683 rc = fan_set_level(newlevel);
8684 if (rc == -ENXIO)
8685 rc = -EINVAL;
8686 else if (!rc) {
8687 fan_update_desired_level(newlevel);
8688 fan_watchdog_reset();
8689 }
8690 }
8691
8692 mutex_unlock(&fan_mutex);
8693 return (rc) ? rc : count;
8694 }
8695
8696 static DEVICE_ATTR(pwm1, S_IWUSR | S_IRUGO, fan_pwm1_show, fan_pwm1_store);
8697
8698 /* sysfs fan fan1_input ------------------------------------------------ */
8699 static ssize_t fan_fan1_input_show(struct device *dev,
8700 struct device_attribute *attr,
8701 char *buf)
8702 {
8703 int res;
8704 unsigned int speed;
8705
8706 res = fan_get_speed(&speed);
8707 if (res < 0)
8708 return res;
8709
8710 return snprintf(buf, PAGE_SIZE, "%u\n", speed);
8711 }
8712
8713 static DEVICE_ATTR(fan1_input, S_IRUGO, fan_fan1_input_show, NULL);
8714
8715 /* sysfs fan fan2_input ------------------------------------------------ */
8716 static ssize_t fan_fan2_input_show(struct device *dev,
8717 struct device_attribute *attr,
8718 char *buf)
8719 {
8720 int res;
8721 unsigned int speed;
8722
8723 res = fan2_get_speed(&speed);
8724 if (res < 0)
8725 return res;
8726
8727 return snprintf(buf, PAGE_SIZE, "%u\n", speed);
8728 }
8729
8730 static DEVICE_ATTR(fan2_input, S_IRUGO, fan_fan2_input_show, NULL);
8731
8732 /* sysfs fan fan_watchdog (hwmon driver) ------------------------------- */
8733 static ssize_t fan_watchdog_show(struct device_driver *drv, char *buf)
8734 {
8735 return snprintf(buf, PAGE_SIZE, "%u\n", fan_watchdog_maxinterval);
8736 }
8737
8738 static ssize_t fan_watchdog_store(struct device_driver *drv, const char *buf,
8739 size_t count)
8740 {
8741 unsigned long t;
8742
8743 if (parse_strtoul(buf, 120, &t))
8744 return -EINVAL;
8745
8746 if (!fan_control_allowed)
8747 return -EPERM;
8748
8749 fan_watchdog_maxinterval = t;
8750 fan_watchdog_reset();
8751
8752 tpacpi_disclose_usertask("fan_watchdog", "set to %lu\n", t);
8753
8754 return count;
8755 }
8756 static DRIVER_ATTR_RW(fan_watchdog);
8757
8758 /* --------------------------------------------------------------------- */
8759 static struct attribute *fan_attributes[] = {
8760 &dev_attr_pwm1_enable.attr, &dev_attr_pwm1.attr,
8761 &dev_attr_fan1_input.attr,
8762 NULL, /* for fan2_input */
8763 NULL
8764 };
8765
8766 static const struct attribute_group fan_attr_group = {
8767 .attrs = fan_attributes,
8768 };
8769
8770 #define TPACPI_FAN_Q1 0x0001 /* Unitialized HFSP */
8771 #define TPACPI_FAN_2FAN 0x0002 /* EC 0x31 bit 0 selects fan2 */
8772 #define TPACPI_FAN_2CTL 0x0004 /* selects fan2 control */
8773
8774 static const struct tpacpi_quirk fan_quirk_table[] __initconst = {
8775 TPACPI_QEC_IBM('1', 'Y', TPACPI_FAN_Q1),
8776 TPACPI_QEC_IBM('7', '8', TPACPI_FAN_Q1),
8777 TPACPI_QEC_IBM('7', '6', TPACPI_FAN_Q1),
8778 TPACPI_QEC_IBM('7', '0', TPACPI_FAN_Q1),
8779 TPACPI_QEC_LNV('7', 'M', TPACPI_FAN_2FAN),
8780 TPACPI_Q_LNV('N', '1', TPACPI_FAN_2FAN),
8781 TPACPI_Q_LNV3('N', '1', 'D', TPACPI_FAN_2CTL), /* P70 */
8782 TPACPI_Q_LNV3('N', '1', 'E', TPACPI_FAN_2CTL), /* P50 */
8783 TPACPI_Q_LNV3('N', '1', 'T', TPACPI_FAN_2CTL), /* P71 */
8784 TPACPI_Q_LNV3('N', '1', 'U', TPACPI_FAN_2CTL), /* P51 */
8785 TPACPI_Q_LNV3('N', '2', 'C', TPACPI_FAN_2CTL), /* P52 / P72 */
8786 TPACPI_Q_LNV3('N', '2', 'E', TPACPI_FAN_2CTL), /* P1 / X1 Extreme (1st gen) */
8787 TPACPI_Q_LNV3('N', '2', 'O', TPACPI_FAN_2CTL), /* P1 / X1 Extreme (2nd gen) */
8788 TPACPI_Q_LNV3('N', '2', 'V', TPACPI_FAN_2CTL), /* P1 / X1 Extreme (3nd gen) */
8789 TPACPI_Q_LNV3('N', '3', '0', TPACPI_FAN_2CTL), /* P15 (1st gen) / P15v (1st gen) */
8790 };
8791
8792 static int __init fan_init(struct ibm_init_struct *iibm)
8793 {
8794 int rc;
8795 unsigned long quirks;
8796
8797 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
8798 "initializing fan subdriver\n");
8799
8800 mutex_init(&fan_mutex);
8801 fan_status_access_mode = TPACPI_FAN_NONE;
8802 fan_control_access_mode = TPACPI_FAN_WR_NONE;
8803 fan_control_commands = 0;
8804 fan_watchdog_maxinterval = 0;
8805 tp_features.fan_ctrl_status_undef = 0;
8806 tp_features.second_fan = 0;
8807 tp_features.second_fan_ctl = 0;
8808 fan_control_desired_level = 7;
8809
8810 if (tpacpi_is_ibm()) {
8811 TPACPI_ACPIHANDLE_INIT(fans);
8812 TPACPI_ACPIHANDLE_INIT(gfan);
8813 TPACPI_ACPIHANDLE_INIT(sfan);
8814 }
8815
8816 quirks = tpacpi_check_quirks(fan_quirk_table,
8817 ARRAY_SIZE(fan_quirk_table));
8818
8819 if (gfan_handle) {
8820 /* 570, 600e/x, 770e, 770x */
8821 fan_status_access_mode = TPACPI_FAN_RD_ACPI_GFAN;
8822 } else {
8823 /* all other ThinkPads: note that even old-style
8824 * ThinkPad ECs supports the fan control register */
8825 if (likely(acpi_ec_read(fan_status_offset,
8826 &fan_control_initial_status))) {
8827 fan_status_access_mode = TPACPI_FAN_RD_TPEC;
8828 if (quirks & TPACPI_FAN_Q1)
8829 fan_quirk1_setup();
8830 if (quirks & TPACPI_FAN_2FAN) {
8831 tp_features.second_fan = 1;
8832 pr_info("secondary fan support enabled\n");
8833 }
8834 if (quirks & TPACPI_FAN_2CTL) {
8835 tp_features.second_fan = 1;
8836 tp_features.second_fan_ctl = 1;
8837 pr_info("secondary fan control enabled\n");
8838 }
8839 } else {
8840 pr_err("ThinkPad ACPI EC access misbehaving, fan status and control unavailable\n");
8841 return 1;
8842 }
8843 }
8844
8845 if (sfan_handle) {
8846 /* 570, 770x-JL */
8847 fan_control_access_mode = TPACPI_FAN_WR_ACPI_SFAN;
8848 fan_control_commands |=
8849 TPACPI_FAN_CMD_LEVEL | TPACPI_FAN_CMD_ENABLE;
8850 } else {
8851 if (!gfan_handle) {
8852 /* gfan without sfan means no fan control */
8853 /* all other models implement TP EC 0x2f control */
8854
8855 if (fans_handle) {
8856 /* X31, X40, X41 */
8857 fan_control_access_mode =
8858 TPACPI_FAN_WR_ACPI_FANS;
8859 fan_control_commands |=
8860 TPACPI_FAN_CMD_SPEED |
8861 TPACPI_FAN_CMD_LEVEL |
8862 TPACPI_FAN_CMD_ENABLE;
8863 } else {
8864 fan_control_access_mode = TPACPI_FAN_WR_TPEC;
8865 fan_control_commands |=
8866 TPACPI_FAN_CMD_LEVEL |
8867 TPACPI_FAN_CMD_ENABLE;
8868 }
8869 }
8870 }
8871
8872 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
8873 "fan is %s, modes %d, %d\n",
8874 str_supported(fan_status_access_mode != TPACPI_FAN_NONE ||
8875 fan_control_access_mode != TPACPI_FAN_WR_NONE),
8876 fan_status_access_mode, fan_control_access_mode);
8877
8878 /* fan control master switch */
8879 if (!fan_control_allowed) {
8880 fan_control_access_mode = TPACPI_FAN_WR_NONE;
8881 fan_control_commands = 0;
8882 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
8883 "fan control features disabled by parameter\n");
8884 }
8885
8886 /* update fan_control_desired_level */
8887 if (fan_status_access_mode != TPACPI_FAN_NONE)
8888 fan_get_status_safe(NULL);
8889
8890 if (fan_status_access_mode != TPACPI_FAN_NONE ||
8891 fan_control_access_mode != TPACPI_FAN_WR_NONE) {
8892 if (tp_features.second_fan) {
8893 /* attach second fan tachometer */
8894 fan_attributes[ARRAY_SIZE(fan_attributes)-2] =
8895 &dev_attr_fan2_input.attr;
8896 }
8897 rc = sysfs_create_group(&tpacpi_hwmon->kobj,
8898 &fan_attr_group);
8899 if (rc < 0)
8900 return rc;
8901
8902 rc = driver_create_file(&tpacpi_hwmon_pdriver.driver,
8903 &driver_attr_fan_watchdog);
8904 if (rc < 0) {
8905 sysfs_remove_group(&tpacpi_hwmon->kobj,
8906 &fan_attr_group);
8907 return rc;
8908 }
8909 return 0;
8910 } else
8911 return 1;
8912 }
8913
8914 static void fan_exit(void)
8915 {
8916 vdbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_FAN,
8917 "cancelling any pending fan watchdog tasks\n");
8918
8919 /* FIXME: can we really do this unconditionally? */
8920 sysfs_remove_group(&tpacpi_hwmon->kobj, &fan_attr_group);
8921 driver_remove_file(&tpacpi_hwmon_pdriver.driver,
8922 &driver_attr_fan_watchdog);
8923
8924 cancel_delayed_work(&fan_watchdog_task);
8925 flush_workqueue(tpacpi_wq);
8926 }
8927
8928 static void fan_suspend(void)
8929 {
8930 int rc;
8931
8932 if (!fan_control_allowed)
8933 return;
8934
8935 /* Store fan status in cache */
8936 fan_control_resume_level = 0;
8937 rc = fan_get_status_safe(&fan_control_resume_level);
8938 if (rc < 0)
8939 pr_notice("failed to read fan level for later restore during resume: %d\n",
8940 rc);
8941
8942 /* if it is undefined, don't attempt to restore it.
8943 * KEEP THIS LAST */
8944 if (tp_features.fan_ctrl_status_undef)
8945 fan_control_resume_level = 0;
8946 }
8947
8948 static void fan_resume(void)
8949 {
8950 u8 current_level = 7;
8951 bool do_set = false;
8952 int rc;
8953
8954 /* DSDT *always* updates status on resume */
8955 tp_features.fan_ctrl_status_undef = 0;
8956
8957 if (!fan_control_allowed ||
8958 !fan_control_resume_level ||
8959 (fan_get_status_safe(&current_level) < 0))
8960 return;
8961
8962 switch (fan_control_access_mode) {
8963 case TPACPI_FAN_WR_ACPI_SFAN:
8964 /* never decrease fan level */
8965 do_set = (fan_control_resume_level > current_level);
8966 break;
8967 case TPACPI_FAN_WR_ACPI_FANS:
8968 case TPACPI_FAN_WR_TPEC:
8969 /* never decrease fan level, scale is:
8970 * TP_EC_FAN_FULLSPEED > 7 >= TP_EC_FAN_AUTO
8971 *
8972 * We expect the firmware to set either 7 or AUTO, but we
8973 * handle FULLSPEED out of paranoia.
8974 *
8975 * So, we can safely only restore FULLSPEED or 7, anything
8976 * else could slow the fan. Restoring AUTO is useless, at
8977 * best that's exactly what the DSDT already set (it is the
8978 * slower it uses).
8979 *
8980 * Always keep in mind that the DSDT *will* have set the
8981 * fans to what the vendor supposes is the best level. We
8982 * muck with it only to speed the fan up.
8983 */
8984 if (fan_control_resume_level != 7 &&
8985 !(fan_control_resume_level & TP_EC_FAN_FULLSPEED))
8986 return;
8987 else
8988 do_set = !(current_level & TP_EC_FAN_FULLSPEED) &&
8989 (current_level != fan_control_resume_level);
8990 break;
8991 default:
8992 return;
8993 }
8994 if (do_set) {
8995 pr_notice("restoring fan level to 0x%02x\n",
8996 fan_control_resume_level);
8997 rc = fan_set_level_safe(fan_control_resume_level);
8998 if (rc < 0)
8999 pr_notice("failed to restore fan level: %d\n", rc);
9000 }
9001 }
9002
9003 static int fan_read(struct seq_file *m)
9004 {
9005 int rc;
9006 u8 status;
9007 unsigned int speed = 0;
9008
9009 switch (fan_status_access_mode) {
9010 case TPACPI_FAN_RD_ACPI_GFAN:
9011 /* 570, 600e/x, 770e, 770x */
9012 rc = fan_get_status_safe(&status);
9013 if (rc < 0)
9014 return rc;
9015
9016 seq_printf(m, "status:\t\t%s\n"
9017 "level:\t\t%d\n",
9018 (status != 0) ? "enabled" : "disabled", status);
9019 break;
9020
9021 case TPACPI_FAN_RD_TPEC:
9022 /* all except 570, 600e/x, 770e, 770x */
9023 rc = fan_get_status_safe(&status);
9024 if (rc < 0)
9025 return rc;
9026
9027 seq_printf(m, "status:\t\t%s\n",
9028 (status != 0) ? "enabled" : "disabled");
9029
9030 rc = fan_get_speed(&speed);
9031 if (rc < 0)
9032 return rc;
9033
9034 seq_printf(m, "speed:\t\t%d\n", speed);
9035
9036 if (status & TP_EC_FAN_FULLSPEED)
9037 /* Disengaged mode takes precedence */
9038 seq_printf(m, "level:\t\tdisengaged\n");
9039 else if (status & TP_EC_FAN_AUTO)
9040 seq_printf(m, "level:\t\tauto\n");
9041 else
9042 seq_printf(m, "level:\t\t%d\n", status);
9043 break;
9044
9045 case TPACPI_FAN_NONE:
9046 default:
9047 seq_printf(m, "status:\t\tnot supported\n");
9048 }
9049
9050 if (fan_control_commands & TPACPI_FAN_CMD_LEVEL) {
9051 seq_printf(m, "commands:\tlevel <level>");
9052
9053 switch (fan_control_access_mode) {
9054 case TPACPI_FAN_WR_ACPI_SFAN:
9055 seq_printf(m, " (<level> is 0-7)\n");
9056 break;
9057
9058 default:
9059 seq_printf(m, " (<level> is 0-7, auto, disengaged, full-speed)\n");
9060 break;
9061 }
9062 }
9063
9064 if (fan_control_commands & TPACPI_FAN_CMD_ENABLE)
9065 seq_printf(m, "commands:\tenable, disable\n"
9066 "commands:\twatchdog <timeout> (<timeout> is 0 (off), 1-120 (seconds))\n");
9067
9068 if (fan_control_commands & TPACPI_FAN_CMD_SPEED)
9069 seq_printf(m, "commands:\tspeed <speed> (<speed> is 0-65535)\n");
9070
9071 return 0;
9072 }
9073
9074 static int fan_write_cmd_level(const char *cmd, int *rc)
9075 {
9076 int level;
9077
9078 if (strlencmp(cmd, "level auto") == 0)
9079 level = TP_EC_FAN_AUTO;
9080 else if ((strlencmp(cmd, "level disengaged") == 0) |
9081 (strlencmp(cmd, "level full-speed") == 0))
9082 level = TP_EC_FAN_FULLSPEED;
9083 else if (sscanf(cmd, "level %d", &level) != 1)
9084 return 0;
9085
9086 *rc = fan_set_level_safe(level);
9087 if (*rc == -ENXIO)
9088 pr_err("level command accepted for unsupported access mode %d\n",
9089 fan_control_access_mode);
9090 else if (!*rc)
9091 tpacpi_disclose_usertask("procfs fan",
9092 "set level to %d\n", level);
9093
9094 return 1;
9095 }
9096
9097 static int fan_write_cmd_enable(const char *cmd, int *rc)
9098 {
9099 if (strlencmp(cmd, "enable") != 0)
9100 return 0;
9101
9102 *rc = fan_set_enable();
9103 if (*rc == -ENXIO)
9104 pr_err("enable command accepted for unsupported access mode %d\n",
9105 fan_control_access_mode);
9106 else if (!*rc)
9107 tpacpi_disclose_usertask("procfs fan", "enable\n");
9108
9109 return 1;
9110 }
9111
9112 static int fan_write_cmd_disable(const char *cmd, int *rc)
9113 {
9114 if (strlencmp(cmd, "disable") != 0)
9115 return 0;
9116
9117 *rc = fan_set_disable();
9118 if (*rc == -ENXIO)
9119 pr_err("disable command accepted for unsupported access mode %d\n",
9120 fan_control_access_mode);
9121 else if (!*rc)
9122 tpacpi_disclose_usertask("procfs fan", "disable\n");
9123
9124 return 1;
9125 }
9126
9127 static int fan_write_cmd_speed(const char *cmd, int *rc)
9128 {
9129 int speed;
9130
9131 /* TODO:
9132 * Support speed <low> <medium> <high> ? */
9133
9134 if (sscanf(cmd, "speed %d", &speed) != 1)
9135 return 0;
9136
9137 *rc = fan_set_speed(speed);
9138 if (*rc == -ENXIO)
9139 pr_err("speed command accepted for unsupported access mode %d\n",
9140 fan_control_access_mode);
9141 else if (!*rc)
9142 tpacpi_disclose_usertask("procfs fan",
9143 "set speed to %d\n", speed);
9144
9145 return 1;
9146 }
9147
9148 static int fan_write_cmd_watchdog(const char *cmd, int *rc)
9149 {
9150 int interval;
9151
9152 if (sscanf(cmd, "watchdog %d", &interval) != 1)
9153 return 0;
9154
9155 if (interval < 0 || interval > 120)
9156 *rc = -EINVAL;
9157 else {
9158 fan_watchdog_maxinterval = interval;
9159 tpacpi_disclose_usertask("procfs fan",
9160 "set watchdog timer to %d\n",
9161 interval);
9162 }
9163
9164 return 1;
9165 }
9166
9167 static int fan_write(char *buf)
9168 {
9169 char *cmd;
9170 int rc = 0;
9171
9172 while (!rc && (cmd = strsep(&buf, ","))) {
9173 if (!((fan_control_commands & TPACPI_FAN_CMD_LEVEL) &&
9174 fan_write_cmd_level(cmd, &rc)) &&
9175 !((fan_control_commands & TPACPI_FAN_CMD_ENABLE) &&
9176 (fan_write_cmd_enable(cmd, &rc) ||
9177 fan_write_cmd_disable(cmd, &rc) ||
9178 fan_write_cmd_watchdog(cmd, &rc))) &&
9179 !((fan_control_commands & TPACPI_FAN_CMD_SPEED) &&
9180 fan_write_cmd_speed(cmd, &rc))
9181 )
9182 rc = -EINVAL;
9183 else if (!rc)
9184 fan_watchdog_reset();
9185 }
9186
9187 return rc;
9188 }
9189
9190 static struct ibm_struct fan_driver_data = {
9191 .name = "fan",
9192 .read = fan_read,
9193 .write = fan_write,
9194 .exit = fan_exit,
9195 .suspend = fan_suspend,
9196 .resume = fan_resume,
9197 };
9198
9199 /*************************************************************************
9200 * Mute LED subdriver
9201 */
9202
9203 #define TPACPI_LED_MAX 2
9204
9205 struct tp_led_table {
9206 acpi_string name;
9207 int on_value;
9208 int off_value;
9209 int state;
9210 };
9211
9212 static struct tp_led_table led_tables[TPACPI_LED_MAX] = {
9213 [LED_AUDIO_MUTE] = {
9214 .name = "SSMS",
9215 .on_value = 1,
9216 .off_value = 0,
9217 },
9218 [LED_AUDIO_MICMUTE] = {
9219 .name = "MMTS",
9220 .on_value = 2,
9221 .off_value = 0,
9222 },
9223 };
9224
9225 static int mute_led_on_off(struct tp_led_table *t, bool state)
9226 {
9227 acpi_handle temp;
9228 int output;
9229
9230 if (ACPI_FAILURE(acpi_get_handle(hkey_handle, t->name, &temp))) {
9231 pr_warn("Thinkpad ACPI has no %s interface.\n", t->name);
9232 return -EIO;
9233 }
9234
9235 if (!acpi_evalf(hkey_handle, &output, t->name, "dd",
9236 state ? t->on_value : t->off_value))
9237 return -EIO;
9238
9239 t->state = state;
9240 return state;
9241 }
9242
9243 static int tpacpi_led_set(int whichled, bool on)
9244 {
9245 struct tp_led_table *t;
9246
9247 t = &led_tables[whichled];
9248 if (t->state < 0 || t->state == on)
9249 return t->state;
9250 return mute_led_on_off(t, on);
9251 }
9252
9253 static int tpacpi_led_mute_set(struct led_classdev *led_cdev,
9254 enum led_brightness brightness)
9255 {
9256 return tpacpi_led_set(LED_AUDIO_MUTE, brightness != LED_OFF);
9257 }
9258
9259 static int tpacpi_led_micmute_set(struct led_classdev *led_cdev,
9260 enum led_brightness brightness)
9261 {
9262 return tpacpi_led_set(LED_AUDIO_MICMUTE, brightness != LED_OFF);
9263 }
9264
9265 static struct led_classdev mute_led_cdev[TPACPI_LED_MAX] = {
9266 [LED_AUDIO_MUTE] = {
9267 .name = "platform::mute",
9268 .max_brightness = 1,
9269 .brightness_set_blocking = tpacpi_led_mute_set,
9270 .default_trigger = "audio-mute",
9271 },
9272 [LED_AUDIO_MICMUTE] = {
9273 .name = "platform::micmute",
9274 .max_brightness = 1,
9275 .brightness_set_blocking = tpacpi_led_micmute_set,
9276 .default_trigger = "audio-micmute",
9277 },
9278 };
9279
9280 static int mute_led_init(struct ibm_init_struct *iibm)
9281 {
9282 acpi_handle temp;
9283 int i, err;
9284
9285 for (i = 0; i < TPACPI_LED_MAX; i++) {
9286 struct tp_led_table *t = &led_tables[i];
9287 if (ACPI_FAILURE(acpi_get_handle(hkey_handle, t->name, &temp))) {
9288 t->state = -ENODEV;
9289 continue;
9290 }
9291
9292 mute_led_cdev[i].brightness = ledtrig_audio_get(i);
9293 err = led_classdev_register(&tpacpi_pdev->dev, &mute_led_cdev[i]);
9294 if (err < 0) {
9295 while (i--)
9296 led_classdev_unregister(&mute_led_cdev[i]);
9297 return err;
9298 }
9299 }
9300 return 0;
9301 }
9302
9303 static void mute_led_exit(void)
9304 {
9305 int i;
9306
9307 for (i = 0; i < TPACPI_LED_MAX; i++) {
9308 led_classdev_unregister(&mute_led_cdev[i]);
9309 tpacpi_led_set(i, false);
9310 }
9311 }
9312
9313 static void mute_led_resume(void)
9314 {
9315 int i;
9316
9317 for (i = 0; i < TPACPI_LED_MAX; i++) {
9318 struct tp_led_table *t = &led_tables[i];
9319 if (t->state >= 0)
9320 mute_led_on_off(t, t->state);
9321 }
9322 }
9323
9324 static struct ibm_struct mute_led_driver_data = {
9325 .name = "mute_led",
9326 .exit = mute_led_exit,
9327 .resume = mute_led_resume,
9328 };
9329
9330 /*
9331 * Battery Wear Control Driver
9332 * Contact: Ognjen Galic <smclt30p@gmail.com>
9333 */
9334
9335 /* Metadata */
9336
9337 #define GET_START "BCTG"
9338 #define SET_START "BCCS"
9339 #define GET_STOP "BCSG"
9340 #define SET_STOP "BCSS"
9341
9342 enum {
9343 BAT_ANY = 0,
9344 BAT_PRIMARY = 1,
9345 BAT_SECONDARY = 2
9346 };
9347
9348 enum {
9349 /* Error condition bit */
9350 METHOD_ERR = BIT(31),
9351 };
9352
9353 enum {
9354 /* This is used in the get/set helpers */
9355 THRESHOLD_START,
9356 THRESHOLD_STOP,
9357 };
9358
9359 struct tpacpi_battery_data {
9360 int charge_start;
9361 int start_support;
9362 int charge_stop;
9363 int stop_support;
9364 };
9365
9366 struct tpacpi_battery_driver_data {
9367 struct tpacpi_battery_data batteries[3];
9368 int individual_addressing;
9369 };
9370
9371 static struct tpacpi_battery_driver_data battery_info;
9372
9373 /* ACPI helpers/functions/probes */
9374
9375 /**
9376 * This evaluates a ACPI method call specific to the battery
9377 * ACPI extension. The specifics are that an error is marked
9378 * in the 32rd bit of the response, so we just check that here.
9379 */
9380 static acpi_status tpacpi_battery_acpi_eval(char *method, int *ret, int param)
9381 {
9382 int response;
9383
9384 if (!acpi_evalf(hkey_handle, &response, method, "dd", param)) {
9385 acpi_handle_err(hkey_handle, "%s: evaluate failed", method);
9386 return AE_ERROR;
9387 }
9388 if (response & METHOD_ERR) {
9389 acpi_handle_err(hkey_handle,
9390 "%s evaluated but flagged as error", method);
9391 return AE_ERROR;
9392 }
9393 *ret = response;
9394 return AE_OK;
9395 }
9396
9397 static int tpacpi_battery_get(int what, int battery, int *ret)
9398 {
9399 switch (what) {
9400 case THRESHOLD_START:
9401 if ACPI_FAILURE(tpacpi_battery_acpi_eval(GET_START, ret, battery))
9402 return -ENODEV;
9403
9404 /* The value is in the low 8 bits of the response */
9405 *ret = *ret & 0xFF;
9406 return 0;
9407 case THRESHOLD_STOP:
9408 if ACPI_FAILURE(tpacpi_battery_acpi_eval(GET_STOP, ret, battery))
9409 return -ENODEV;
9410 /* Value is in lower 8 bits */
9411 *ret = *ret & 0xFF;
9412 /*
9413 * On the stop value, if we return 0 that
9414 * does not make any sense. 0 means Default, which
9415 * means that charging stops at 100%, so we return
9416 * that.
9417 */
9418 if (*ret == 0)
9419 *ret = 100;
9420 return 0;
9421 default:
9422 pr_crit("wrong parameter: %d", what);
9423 return -EINVAL;
9424 }
9425 }
9426
9427 static int tpacpi_battery_set(int what, int battery, int value)
9428 {
9429 int param, ret;
9430 /* The first 8 bits are the value of the threshold */
9431 param = value;
9432 /* The battery ID is in bits 8-9, 2 bits */
9433 param |= battery << 8;
9434
9435 switch (what) {
9436 case THRESHOLD_START:
9437 if ACPI_FAILURE(tpacpi_battery_acpi_eval(SET_START, &ret, param)) {
9438 pr_err("failed to set charge threshold on battery %d",
9439 battery);
9440 return -ENODEV;
9441 }
9442 return 0;
9443 case THRESHOLD_STOP:
9444 if ACPI_FAILURE(tpacpi_battery_acpi_eval(SET_STOP, &ret, param)) {
9445 pr_err("failed to set stop threshold: %d", battery);
9446 return -ENODEV;
9447 }
9448 return 0;
9449 default:
9450 pr_crit("wrong parameter: %d", what);
9451 return -EINVAL;
9452 }
9453 }
9454
9455 static int tpacpi_battery_probe(int battery)
9456 {
9457 int ret = 0;
9458
9459 memset(&battery_info.batteries[battery], 0,
9460 sizeof(battery_info.batteries[battery]));
9461
9462 /*
9463 * 1) Get the current start threshold
9464 * 2) Check for support
9465 * 3) Get the current stop threshold
9466 * 4) Check for support
9467 */
9468 if (acpi_has_method(hkey_handle, GET_START)) {
9469 if ACPI_FAILURE(tpacpi_battery_acpi_eval(GET_START, &ret, battery)) {
9470 pr_err("Error probing battery %d\n", battery);
9471 return -ENODEV;
9472 }
9473 /* Individual addressing is in bit 9 */
9474 if (ret & BIT(9))
9475 battery_info.individual_addressing = true;
9476 /* Support is marked in bit 8 */
9477 if (ret & BIT(8))
9478 battery_info.batteries[battery].start_support = 1;
9479 else
9480 return -ENODEV;
9481 if (tpacpi_battery_get(THRESHOLD_START, battery,
9482 &battery_info.batteries[battery].charge_start)) {
9483 pr_err("Error probing battery %d\n", battery);
9484 return -ENODEV;
9485 }
9486 }
9487 if (acpi_has_method(hkey_handle, GET_STOP)) {
9488 if ACPI_FAILURE(tpacpi_battery_acpi_eval(GET_STOP, &ret, battery)) {
9489 pr_err("Error probing battery stop; %d\n", battery);
9490 return -ENODEV;
9491 }
9492 /* Support is marked in bit 8 */
9493 if (ret & BIT(8))
9494 battery_info.batteries[battery].stop_support = 1;
9495 else
9496 return -ENODEV;
9497 if (tpacpi_battery_get(THRESHOLD_STOP, battery,
9498 &battery_info.batteries[battery].charge_stop)) {
9499 pr_err("Error probing battery stop: %d\n", battery);
9500 return -ENODEV;
9501 }
9502 }
9503 pr_info("battery %d registered (start %d, stop %d)",
9504 battery,
9505 battery_info.batteries[battery].charge_start,
9506 battery_info.batteries[battery].charge_stop);
9507
9508 return 0;
9509 }
9510
9511 /* General helper functions */
9512
9513 static int tpacpi_battery_get_id(const char *battery_name)
9514 {
9515
9516 if (strcmp(battery_name, "BAT0") == 0 ||
9517 tp_features.battery_force_primary)
9518 return BAT_PRIMARY;
9519 if (strcmp(battery_name, "BAT1") == 0)
9520 return BAT_SECONDARY;
9521 /*
9522 * If for some reason the battery is not BAT0 nor is it
9523 * BAT1, we will assume it's the default, first battery,
9524 * AKA primary.
9525 */
9526 pr_warn("unknown battery %s, assuming primary", battery_name);
9527 return BAT_PRIMARY;
9528 }
9529
9530 /* sysfs interface */
9531
9532 static ssize_t tpacpi_battery_store(int what,
9533 struct device *dev,
9534 const char *buf, size_t count)
9535 {
9536 struct power_supply *supply = to_power_supply(dev);
9537 unsigned long value;
9538 int battery, rval;
9539 /*
9540 * Some systems have support for more than
9541 * one battery. If that is the case,
9542 * tpacpi_battery_probe marked that addressing
9543 * them individually is supported, so we do that
9544 * based on the device struct.
9545 *
9546 * On systems that are not supported, we assume
9547 * the primary as most of the ACPI calls fail
9548 * with "Any Battery" as the parameter.
9549 */
9550 if (battery_info.individual_addressing)
9551 /* BAT_PRIMARY or BAT_SECONDARY */
9552 battery = tpacpi_battery_get_id(supply->desc->name);
9553 else
9554 battery = BAT_PRIMARY;
9555
9556 rval = kstrtoul(buf, 10, &value);
9557 if (rval)
9558 return rval;
9559
9560 switch (what) {
9561 case THRESHOLD_START:
9562 if (!battery_info.batteries[battery].start_support)
9563 return -ENODEV;
9564 /* valid values are [0, 99] */
9565 if (value > 99)
9566 return -EINVAL;
9567 if (value > battery_info.batteries[battery].charge_stop)
9568 return -EINVAL;
9569 if (tpacpi_battery_set(THRESHOLD_START, battery, value))
9570 return -ENODEV;
9571 battery_info.batteries[battery].charge_start = value;
9572 return count;
9573
9574 case THRESHOLD_STOP:
9575 if (!battery_info.batteries[battery].stop_support)
9576 return -ENODEV;
9577 /* valid values are [1, 100] */
9578 if (value < 1 || value > 100)
9579 return -EINVAL;
9580 if (value < battery_info.batteries[battery].charge_start)
9581 return -EINVAL;
9582 battery_info.batteries[battery].charge_stop = value;
9583 /*
9584 * When 100 is passed to stop, we need to flip
9585 * it to 0 as that the EC understands that as
9586 * "Default", which will charge to 100%
9587 */
9588 if (value == 100)
9589 value = 0;
9590 if (tpacpi_battery_set(THRESHOLD_STOP, battery, value))
9591 return -EINVAL;
9592 return count;
9593 default:
9594 pr_crit("Wrong parameter: %d", what);
9595 return -EINVAL;
9596 }
9597 return count;
9598 }
9599
9600 static ssize_t tpacpi_battery_show(int what,
9601 struct device *dev,
9602 char *buf)
9603 {
9604 struct power_supply *supply = to_power_supply(dev);
9605 int ret, battery;
9606 /*
9607 * Some systems have support for more than
9608 * one battery. If that is the case,
9609 * tpacpi_battery_probe marked that addressing
9610 * them individually is supported, so we;
9611 * based on the device struct.
9612 *
9613 * On systems that are not supported, we assume
9614 * the primary as most of the ACPI calls fail
9615 * with "Any Battery" as the parameter.
9616 */
9617 if (battery_info.individual_addressing)
9618 /* BAT_PRIMARY or BAT_SECONDARY */
9619 battery = tpacpi_battery_get_id(supply->desc->name);
9620 else
9621 battery = BAT_PRIMARY;
9622 if (tpacpi_battery_get(what, battery, &ret))
9623 return -ENODEV;
9624 return sprintf(buf, "%d\n", ret);
9625 }
9626
9627 static ssize_t charge_control_start_threshold_show(struct device *device,
9628 struct device_attribute *attr,
9629 char *buf)
9630 {
9631 return tpacpi_battery_show(THRESHOLD_START, device, buf);
9632 }
9633
9634 static ssize_t charge_control_end_threshold_show(struct device *device,
9635 struct device_attribute *attr,
9636 char *buf)
9637 {
9638 return tpacpi_battery_show(THRESHOLD_STOP, device, buf);
9639 }
9640
9641 static ssize_t charge_control_start_threshold_store(struct device *dev,
9642 struct device_attribute *attr,
9643 const char *buf, size_t count)
9644 {
9645 return tpacpi_battery_store(THRESHOLD_START, dev, buf, count);
9646 }
9647
9648 static ssize_t charge_control_end_threshold_store(struct device *dev,
9649 struct device_attribute *attr,
9650 const char *buf, size_t count)
9651 {
9652 return tpacpi_battery_store(THRESHOLD_STOP, dev, buf, count);
9653 }
9654
9655 static DEVICE_ATTR_RW(charge_control_start_threshold);
9656 static DEVICE_ATTR_RW(charge_control_end_threshold);
9657 static struct device_attribute dev_attr_charge_start_threshold = __ATTR(
9658 charge_start_threshold,
9659 0644,
9660 charge_control_start_threshold_show,
9661 charge_control_start_threshold_store
9662 );
9663 static struct device_attribute dev_attr_charge_stop_threshold = __ATTR(
9664 charge_stop_threshold,
9665 0644,
9666 charge_control_end_threshold_show,
9667 charge_control_end_threshold_store
9668 );
9669
9670 static struct attribute *tpacpi_battery_attrs[] = {
9671 &dev_attr_charge_control_start_threshold.attr,
9672 &dev_attr_charge_control_end_threshold.attr,
9673 &dev_attr_charge_start_threshold.attr,
9674 &dev_attr_charge_stop_threshold.attr,
9675 NULL,
9676 };
9677
9678 ATTRIBUTE_GROUPS(tpacpi_battery);
9679
9680 /* ACPI battery hooking */
9681
9682 static int tpacpi_battery_add(struct power_supply *battery)
9683 {
9684 int batteryid = tpacpi_battery_get_id(battery->desc->name);
9685
9686 if (tpacpi_battery_probe(batteryid))
9687 return -ENODEV;
9688 if (device_add_groups(&battery->dev, tpacpi_battery_groups))
9689 return -ENODEV;
9690 return 0;
9691 }
9692
9693 static int tpacpi_battery_remove(struct power_supply *battery)
9694 {
9695 device_remove_groups(&battery->dev, tpacpi_battery_groups);
9696 return 0;
9697 }
9698
9699 static struct acpi_battery_hook battery_hook = {
9700 .add_battery = tpacpi_battery_add,
9701 .remove_battery = tpacpi_battery_remove,
9702 .name = "ThinkPad Battery Extension",
9703 };
9704
9705 /* Subdriver init/exit */
9706
9707 static const struct tpacpi_quirk battery_quirk_table[] __initconst = {
9708 /*
9709 * Individual addressing is broken on models that expose the
9710 * primary battery as BAT1.
9711 */
9712 TPACPI_Q_LNV('J', '7', true), /* B5400 */
9713 TPACPI_Q_LNV('J', 'I', true), /* Thinkpad 11e */
9714 TPACPI_Q_LNV3('R', '0', 'B', true), /* Thinkpad 11e gen 3 */
9715 TPACPI_Q_LNV3('R', '0', 'C', true), /* Thinkpad 13 */
9716 TPACPI_Q_LNV3('R', '0', 'J', true), /* Thinkpad 13 gen 2 */
9717 TPACPI_Q_LNV3('R', '0', 'K', true), /* Thinkpad 11e gen 4 celeron BIOS */
9718 };
9719
9720 static int __init tpacpi_battery_init(struct ibm_init_struct *ibm)
9721 {
9722 memset(&battery_info, 0, sizeof(battery_info));
9723
9724 tp_features.battery_force_primary = tpacpi_check_quirks(
9725 battery_quirk_table,
9726 ARRAY_SIZE(battery_quirk_table));
9727
9728 battery_hook_register(&battery_hook);
9729 return 0;
9730 }
9731
9732 static void tpacpi_battery_exit(void)
9733 {
9734 battery_hook_unregister(&battery_hook);
9735 }
9736
9737 static struct ibm_struct battery_driver_data = {
9738 .name = "battery",
9739 .exit = tpacpi_battery_exit,
9740 };
9741
9742 /*************************************************************************
9743 * LCD Shadow subdriver, for the Lenovo PrivacyGuard feature
9744 */
9745
9746 static int lcdshadow_state;
9747
9748 static int lcdshadow_on_off(bool state)
9749 {
9750 acpi_handle set_shadow_handle;
9751 int output;
9752
9753 if (ACPI_FAILURE(acpi_get_handle(hkey_handle, "SSSS", &set_shadow_handle))) {
9754 pr_warn("Thinkpad ACPI has no %s interface.\n", "SSSS");
9755 return -EIO;
9756 }
9757
9758 if (!acpi_evalf(set_shadow_handle, &output, NULL, "dd", (int)state))
9759 return -EIO;
9760
9761 lcdshadow_state = state;
9762 return 0;
9763 }
9764
9765 static int lcdshadow_set(bool on)
9766 {
9767 if (lcdshadow_state < 0)
9768 return lcdshadow_state;
9769 if (lcdshadow_state == on)
9770 return 0;
9771 return lcdshadow_on_off(on);
9772 }
9773
9774 static int tpacpi_lcdshadow_init(struct ibm_init_struct *iibm)
9775 {
9776 acpi_handle get_shadow_handle;
9777 int output;
9778
9779 if (ACPI_FAILURE(acpi_get_handle(hkey_handle, "GSSS", &get_shadow_handle))) {
9780 lcdshadow_state = -ENODEV;
9781 return 0;
9782 }
9783
9784 if (!acpi_evalf(get_shadow_handle, &output, NULL, "dd", 0)) {
9785 lcdshadow_state = -EIO;
9786 return -EIO;
9787 }
9788 if (!(output & 0x10000)) {
9789 lcdshadow_state = -ENODEV;
9790 return 0;
9791 }
9792 lcdshadow_state = output & 0x1;
9793
9794 return 0;
9795 }
9796
9797 static void lcdshadow_resume(void)
9798 {
9799 if (lcdshadow_state >= 0)
9800 lcdshadow_on_off(lcdshadow_state);
9801 }
9802
9803 static int lcdshadow_read(struct seq_file *m)
9804 {
9805 if (lcdshadow_state < 0) {
9806 seq_puts(m, "status:\t\tnot supported\n");
9807 } else {
9808 seq_printf(m, "status:\t\t%d\n", lcdshadow_state);
9809 seq_puts(m, "commands:\t0, 1\n");
9810 }
9811
9812 return 0;
9813 }
9814
9815 static int lcdshadow_write(char *buf)
9816 {
9817 char *cmd;
9818 int res, state = -EINVAL;
9819
9820 if (lcdshadow_state < 0)
9821 return -ENODEV;
9822
9823 while ((cmd = strsep(&buf, ","))) {
9824 res = kstrtoint(cmd, 10, &state);
9825 if (res < 0)
9826 return res;
9827 }
9828
9829 if (state >= 2 || state < 0)
9830 return -EINVAL;
9831
9832 return lcdshadow_set(state);
9833 }
9834
9835 static struct ibm_struct lcdshadow_driver_data = {
9836 .name = "lcdshadow",
9837 .resume = lcdshadow_resume,
9838 .read = lcdshadow_read,
9839 .write = lcdshadow_write,
9840 };
9841
9842 /*************************************************************************
9843 * Thinkpad sensor interfaces
9844 */
9845
9846 #define DYTC_CMD_GET 2 /* To get current IC function and mode */
9847 #define DYTC_GET_LAPMODE_BIT 17 /* Set when in lapmode */
9848
9849 #define PALMSENSOR_PRESENT_BIT 0 /* Determine if psensor present */
9850 #define PALMSENSOR_ON_BIT 1 /* psensor status */
9851
9852 static bool has_palmsensor;
9853 static bool has_lapsensor;
9854 static bool palm_state;
9855 static bool lap_state;
9856
9857 static int lapsensor_get(bool *present, bool *state)
9858 {
9859 acpi_handle dytc_handle;
9860 int output;
9861
9862 *present = false;
9863 if (ACPI_FAILURE(acpi_get_handle(hkey_handle, "DYTC", &dytc_handle)))
9864 return -ENODEV;
9865 if (!acpi_evalf(dytc_handle, &output, NULL, "dd", DYTC_CMD_GET))
9866 return -EIO;
9867
9868 *present = true; /*If we get his far, we have lapmode support*/
9869 *state = output & BIT(DYTC_GET_LAPMODE_BIT) ? true : false;
9870 return 0;
9871 }
9872
9873 static int palmsensor_get(bool *present, bool *state)
9874 {
9875 acpi_handle psensor_handle;
9876 int output;
9877
9878 *present = false;
9879 if (ACPI_FAILURE(acpi_get_handle(hkey_handle, "GPSS", &psensor_handle)))
9880 return -ENODEV;
9881 if (!acpi_evalf(psensor_handle, &output, NULL, "d"))
9882 return -EIO;
9883
9884 *present = output & BIT(PALMSENSOR_PRESENT_BIT) ? true : false;
9885 *state = output & BIT(PALMSENSOR_ON_BIT) ? true : false;
9886 return 0;
9887 }
9888
9889 static void lapsensor_refresh(void)
9890 {
9891 bool state;
9892 int err;
9893
9894 if (has_lapsensor) {
9895 err = lapsensor_get(&has_lapsensor, &state);
9896 if (err)
9897 return;
9898 if (lap_state != state) {
9899 lap_state = state;
9900 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL, "dytc_lapmode");
9901 }
9902 }
9903 }
9904
9905 static void palmsensor_refresh(void)
9906 {
9907 bool state;
9908 int err;
9909
9910 if (has_palmsensor) {
9911 err = palmsensor_get(&has_palmsensor, &state);
9912 if (err)
9913 return;
9914 if (palm_state != state) {
9915 palm_state = state;
9916 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL, "palmsensor");
9917 }
9918 }
9919 }
9920
9921 static ssize_t dytc_lapmode_show(struct device *dev,
9922 struct device_attribute *attr,
9923 char *buf)
9924 {
9925 if (has_lapsensor)
9926 return sysfs_emit(buf, "%d\n", lap_state);
9927 return sysfs_emit(buf, "\n");
9928 }
9929 static DEVICE_ATTR_RO(dytc_lapmode);
9930
9931 static ssize_t palmsensor_show(struct device *dev,
9932 struct device_attribute *attr,
9933 char *buf)
9934 {
9935 if (has_palmsensor)
9936 return sysfs_emit(buf, "%d\n", palm_state);
9937 return sysfs_emit(buf, "\n");
9938 }
9939 static DEVICE_ATTR_RO(palmsensor);
9940
9941 static int tpacpi_proxsensor_init(struct ibm_init_struct *iibm)
9942 {
9943 int palm_err, lap_err, err;
9944
9945 palm_err = palmsensor_get(&has_palmsensor, &palm_state);
9946 lap_err = lapsensor_get(&has_lapsensor, &lap_state);
9947 /*
9948 * If support isn't available (ENODEV) for both devices then quit, but
9949 * don't return an error.
9950 */
9951 if ((palm_err == -ENODEV) && (lap_err == -ENODEV))
9952 return 0;
9953 /* Otherwise, if there was an error return it */
9954 if (palm_err && (palm_err != ENODEV))
9955 return palm_err;
9956 if (lap_err && (lap_err != ENODEV))
9957 return lap_err;
9958
9959 if (has_palmsensor) {
9960 err = sysfs_create_file(&tpacpi_pdev->dev.kobj, &dev_attr_palmsensor.attr);
9961 if (err)
9962 return err;
9963 }
9964 if (has_lapsensor) {
9965 err = sysfs_create_file(&tpacpi_pdev->dev.kobj, &dev_attr_dytc_lapmode.attr);
9966 if (err)
9967 return err;
9968 }
9969 return 0;
9970 }
9971
9972 static void proxsensor_exit(void)
9973 {
9974 if (has_lapsensor)
9975 sysfs_remove_file(&tpacpi_pdev->dev.kobj, &dev_attr_dytc_lapmode.attr);
9976 if (has_palmsensor)
9977 sysfs_remove_file(&tpacpi_pdev->dev.kobj, &dev_attr_palmsensor.attr);
9978 }
9979
9980 static struct ibm_struct proxsensor_driver_data = {
9981 .name = "proximity-sensor",
9982 .exit = proxsensor_exit,
9983 };
9984
9985 /****************************************************************************
9986 ****************************************************************************
9987 *
9988 * Infrastructure
9989 *
9990 ****************************************************************************
9991 ****************************************************************************/
9992
9993 /*
9994 * HKEY event callout for other subdrivers go here
9995 * (yes, it is ugly, but it is quick, safe, and gets the job done
9996 */
9997 static void tpacpi_driver_event(const unsigned int hkey_event)
9998 {
9999 if (ibm_backlight_device) {
10000 switch (hkey_event) {
10001 case TP_HKEY_EV_BRGHT_UP:
10002 case TP_HKEY_EV_BRGHT_DOWN:
10003 tpacpi_brightness_notify_change();
10004 }
10005 }
10006 if (alsa_card) {
10007 switch (hkey_event) {
10008 case TP_HKEY_EV_VOL_UP:
10009 case TP_HKEY_EV_VOL_DOWN:
10010 case TP_HKEY_EV_VOL_MUTE:
10011 volume_alsa_notify_change();
10012 }
10013 }
10014 if (tp_features.kbdlight && hkey_event == TP_HKEY_EV_KBD_LIGHT) {
10015 enum led_brightness brightness;
10016
10017 mutex_lock(&kbdlight_mutex);
10018
10019 /*
10020 * Check the brightness actually changed, setting the brightness
10021 * through kbdlight_set_level() also triggers this event.
10022 */
10023 brightness = kbdlight_sysfs_get(NULL);
10024 if (kbdlight_brightness != brightness) {
10025 kbdlight_brightness = brightness;
10026 led_classdev_notify_brightness_hw_changed(
10027 &tpacpi_led_kbdlight.led_classdev, brightness);
10028 }
10029
10030 mutex_unlock(&kbdlight_mutex);
10031 }
10032
10033 if (hkey_event == TP_HKEY_EV_THM_CSM_COMPLETED)
10034 lapsensor_refresh();
10035 }
10036
10037 static void hotkey_driver_event(const unsigned int scancode)
10038 {
10039 tpacpi_driver_event(TP_HKEY_EV_HOTKEY_BASE + scancode);
10040 }
10041
10042 /* --------------------------------------------------------------------- */
10043
10044 /* /proc support */
10045 static struct proc_dir_entry *proc_dir;
10046
10047 /*
10048 * Module and infrastructure proble, init and exit handling
10049 */
10050
10051 static bool force_load;
10052
10053 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
10054 static const char * __init str_supported(int is_supported)
10055 {
10056 static char text_unsupported[] __initdata = "not supported";
10057
10058 return (is_supported) ? &text_unsupported[4] : &text_unsupported[0];
10059 }
10060 #endif /* CONFIG_THINKPAD_ACPI_DEBUG */
10061
10062 static void ibm_exit(struct ibm_struct *ibm)
10063 {
10064 dbg_printk(TPACPI_DBG_EXIT, "removing %s\n", ibm->name);
10065
10066 list_del_init(&ibm->all_drivers);
10067
10068 if (ibm->flags.acpi_notify_installed) {
10069 dbg_printk(TPACPI_DBG_EXIT,
10070 "%s: acpi_remove_notify_handler\n", ibm->name);
10071 BUG_ON(!ibm->acpi);
10072 acpi_remove_notify_handler(*ibm->acpi->handle,
10073 ibm->acpi->type,
10074 dispatch_acpi_notify);
10075 ibm->flags.acpi_notify_installed = 0;
10076 }
10077
10078 if (ibm->flags.proc_created) {
10079 dbg_printk(TPACPI_DBG_EXIT,
10080 "%s: remove_proc_entry\n", ibm->name);
10081 remove_proc_entry(ibm->name, proc_dir);
10082 ibm->flags.proc_created = 0;
10083 }
10084
10085 if (ibm->flags.acpi_driver_registered) {
10086 dbg_printk(TPACPI_DBG_EXIT,
10087 "%s: acpi_bus_unregister_driver\n", ibm->name);
10088 BUG_ON(!ibm->acpi);
10089 acpi_bus_unregister_driver(ibm->acpi->driver);
10090 kfree(ibm->acpi->driver);
10091 ibm->acpi->driver = NULL;
10092 ibm->flags.acpi_driver_registered = 0;
10093 }
10094
10095 if (ibm->flags.init_called && ibm->exit) {
10096 ibm->exit();
10097 ibm->flags.init_called = 0;
10098 }
10099
10100 dbg_printk(TPACPI_DBG_INIT, "finished removing %s\n", ibm->name);
10101 }
10102
10103 static int __init ibm_init(struct ibm_init_struct *iibm)
10104 {
10105 int ret;
10106 struct ibm_struct *ibm = iibm->data;
10107 struct proc_dir_entry *entry;
10108
10109 BUG_ON(ibm == NULL);
10110
10111 INIT_LIST_HEAD(&ibm->all_drivers);
10112
10113 if (ibm->flags.experimental && !experimental)
10114 return 0;
10115
10116 dbg_printk(TPACPI_DBG_INIT,
10117 "probing for %s\n", ibm->name);
10118
10119 if (iibm->init) {
10120 ret = iibm->init(iibm);
10121 if (ret > 0)
10122 return 0; /* probe failed */
10123 if (ret)
10124 return ret;
10125
10126 ibm->flags.init_called = 1;
10127 }
10128
10129 if (ibm->acpi) {
10130 if (ibm->acpi->hid) {
10131 ret = register_tpacpi_subdriver(ibm);
10132 if (ret)
10133 goto err_out;
10134 }
10135
10136 if (ibm->acpi->notify) {
10137 ret = setup_acpi_notify(ibm);
10138 if (ret == -ENODEV) {
10139 pr_notice("disabling subdriver %s\n",
10140 ibm->name);
10141 ret = 0;
10142 goto err_out;
10143 }
10144 if (ret < 0)
10145 goto err_out;
10146 }
10147 }
10148
10149 dbg_printk(TPACPI_DBG_INIT,
10150 "%s installed\n", ibm->name);
10151
10152 if (ibm->read) {
10153 umode_t mode = iibm->base_procfs_mode;
10154
10155 if (!mode)
10156 mode = S_IRUGO;
10157 if (ibm->write)
10158 mode |= S_IWUSR;
10159 entry = proc_create_data(ibm->name, mode, proc_dir,
10160 &dispatch_proc_ops, ibm);
10161 if (!entry) {
10162 pr_err("unable to create proc entry %s\n", ibm->name);
10163 ret = -ENODEV;
10164 goto err_out;
10165 }
10166 ibm->flags.proc_created = 1;
10167 }
10168
10169 list_add_tail(&ibm->all_drivers, &tpacpi_all_drivers);
10170
10171 return 0;
10172
10173 err_out:
10174 dbg_printk(TPACPI_DBG_INIT,
10175 "%s: at error exit path with result %d\n",
10176 ibm->name, ret);
10177
10178 ibm_exit(ibm);
10179 return (ret < 0) ? ret : 0;
10180 }
10181
10182 /* Probing */
10183
10184 static char __init tpacpi_parse_fw_id(const char * const s,
10185 u32 *model, u16 *release)
10186 {
10187 int i;
10188
10189 if (!s || strlen(s) < 8)
10190 goto invalid;
10191
10192 for (i = 0; i < 8; i++)
10193 if (!((s[i] >= '0' && s[i] <= '9') ||
10194 (s[i] >= 'A' && s[i] <= 'Z')))
10195 goto invalid;
10196
10197 /*
10198 * Most models: xxyTkkWW (#.##c)
10199 * Ancient 570/600 and -SL lacks (#.##c)
10200 */
10201 if (s[3] == 'T' || s[3] == 'N') {
10202 *model = TPID(s[0], s[1]);
10203 *release = TPVER(s[4], s[5]);
10204 return s[2];
10205
10206 /* New models: xxxyTkkW (#.##c); T550 and some others */
10207 } else if (s[4] == 'T' || s[4] == 'N') {
10208 *model = TPID3(s[0], s[1], s[2]);
10209 *release = TPVER(s[5], s[6]);
10210 return s[3];
10211 }
10212
10213 invalid:
10214 return '\0';
10215 }
10216
10217 static void find_new_ec_fwstr(const struct dmi_header *dm, void *private)
10218 {
10219 char *ec_fw_string = (char *) private;
10220 const char *dmi_data = (const char *)dm;
10221 /*
10222 * ThinkPad Embedded Controller Program Table on newer models
10223 *
10224 * Offset | Name | Width | Description
10225 * ----------------------------------------------------
10226 * 0x00 | Type | BYTE | 0x8C
10227 * 0x01 | Length | BYTE |
10228 * 0x02 | Handle | WORD | Varies
10229 * 0x04 | Signature | BYTEx6 | ASCII for "LENOVO"
10230 * 0x0A | OEM struct offset | BYTE | 0x0B
10231 * 0x0B | OEM struct number | BYTE | 0x07, for this structure
10232 * 0x0C | OEM struct revision | BYTE | 0x01, for this format
10233 * 0x0D | ECP version ID | STR ID |
10234 * 0x0E | ECP release date | STR ID |
10235 */
10236
10237 /* Return if data structure not match */
10238 if (dm->type != 140 || dm->length < 0x0F ||
10239 memcmp(dmi_data + 4, "LENOVO", 6) != 0 ||
10240 dmi_data[0x0A] != 0x0B || dmi_data[0x0B] != 0x07 ||
10241 dmi_data[0x0C] != 0x01)
10242 return;
10243
10244 /* fwstr is the first 8byte string */
10245 strncpy(ec_fw_string, dmi_data + 0x0F, 8);
10246 }
10247
10248 /* returns 0 - probe ok, or < 0 - probe error.
10249 * Probe ok doesn't mean thinkpad found.
10250 * On error, kfree() cleanup on tp->* is not performed, caller must do it */
10251 static int __must_check __init get_thinkpad_model_data(
10252 struct thinkpad_id_data *tp)
10253 {
10254 const struct dmi_device *dev = NULL;
10255 char ec_fw_string[18] = {0};
10256 char const *s;
10257 char t;
10258
10259 if (!tp)
10260 return -EINVAL;
10261
10262 memset(tp, 0, sizeof(*tp));
10263
10264 if (dmi_name_in_vendors("IBM"))
10265 tp->vendor = PCI_VENDOR_ID_IBM;
10266 else if (dmi_name_in_vendors("LENOVO"))
10267 tp->vendor = PCI_VENDOR_ID_LENOVO;
10268 else
10269 return 0;
10270
10271 s = dmi_get_system_info(DMI_BIOS_VERSION);
10272 tp->bios_version_str = kstrdup(s, GFP_KERNEL);
10273 if (s && !tp->bios_version_str)
10274 return -ENOMEM;
10275
10276 /* Really ancient ThinkPad 240X will fail this, which is fine */
10277 t = tpacpi_parse_fw_id(tp->bios_version_str,
10278 &tp->bios_model, &tp->bios_release);
10279 if (t != 'E' && t != 'C')
10280 return 0;
10281
10282 /*
10283 * ThinkPad T23 or newer, A31 or newer, R50e or newer,
10284 * X32 or newer, all Z series; Some models must have an
10285 * up-to-date BIOS or they will not be detected.
10286 *
10287 * See https://thinkwiki.org/wiki/List_of_DMI_IDs
10288 */
10289 while ((dev = dmi_find_device(DMI_DEV_TYPE_OEM_STRING, NULL, dev))) {
10290 if (sscanf(dev->name,
10291 "IBM ThinkPad Embedded Controller -[%17c",
10292 ec_fw_string) == 1) {
10293 ec_fw_string[sizeof(ec_fw_string) - 1] = 0;
10294 ec_fw_string[strcspn(ec_fw_string, " ]")] = 0;
10295 break;
10296 }
10297 }
10298
10299 /* Newer ThinkPads have different EC program info table */
10300 if (!ec_fw_string[0])
10301 dmi_walk(find_new_ec_fwstr, &ec_fw_string);
10302
10303 if (ec_fw_string[0]) {
10304 tp->ec_version_str = kstrdup(ec_fw_string, GFP_KERNEL);
10305 if (!tp->ec_version_str)
10306 return -ENOMEM;
10307
10308 t = tpacpi_parse_fw_id(ec_fw_string,
10309 &tp->ec_model, &tp->ec_release);
10310 if (t != 'H') {
10311 pr_notice("ThinkPad firmware release %s doesn't match the known patterns\n",
10312 ec_fw_string);
10313 pr_notice("please report this to %s\n", TPACPI_MAIL);
10314 }
10315 }
10316
10317 s = dmi_get_system_info(DMI_PRODUCT_VERSION);
10318 if (s && !(strncasecmp(s, "ThinkPad", 8) && strncasecmp(s, "Lenovo", 6))) {
10319 tp->model_str = kstrdup(s, GFP_KERNEL);
10320 if (!tp->model_str)
10321 return -ENOMEM;
10322 } else {
10323 s = dmi_get_system_info(DMI_BIOS_VENDOR);
10324 if (s && !(strncasecmp(s, "Lenovo", 6))) {
10325 tp->model_str = kstrdup(s, GFP_KERNEL);
10326 if (!tp->model_str)
10327 return -ENOMEM;
10328 }
10329 }
10330
10331 s = dmi_get_system_info(DMI_PRODUCT_NAME);
10332 tp->nummodel_str = kstrdup(s, GFP_KERNEL);
10333 if (s && !tp->nummodel_str)
10334 return -ENOMEM;
10335
10336 return 0;
10337 }
10338
10339 static int __init probe_for_thinkpad(void)
10340 {
10341 int is_thinkpad;
10342
10343 if (acpi_disabled)
10344 return -ENODEV;
10345
10346 /* It would be dangerous to run the driver in this case */
10347 if (!tpacpi_is_ibm() && !tpacpi_is_lenovo())
10348 return -ENODEV;
10349
10350 /*
10351 * Non-ancient models have better DMI tagging, but very old models
10352 * don't. tpacpi_is_fw_known() is a cheat to help in that case.
10353 */
10354 is_thinkpad = (thinkpad_id.model_str != NULL) ||
10355 (thinkpad_id.ec_model != 0) ||
10356 tpacpi_is_fw_known();
10357
10358 /* The EC handler is required */
10359 tpacpi_acpi_handle_locate("ec", TPACPI_ACPI_EC_HID, &ec_handle);
10360 if (!ec_handle) {
10361 if (is_thinkpad)
10362 pr_err("Not yet supported ThinkPad detected!\n");
10363 return -ENODEV;
10364 }
10365
10366 if (!is_thinkpad && !force_load)
10367 return -ENODEV;
10368
10369 return 0;
10370 }
10371
10372 static void __init thinkpad_acpi_init_banner(void)
10373 {
10374 pr_info("%s v%s\n", TPACPI_DESC, TPACPI_VERSION);
10375 pr_info("%s\n", TPACPI_URL);
10376
10377 pr_info("ThinkPad BIOS %s, EC %s\n",
10378 (thinkpad_id.bios_version_str) ?
10379 thinkpad_id.bios_version_str : "unknown",
10380 (thinkpad_id.ec_version_str) ?
10381 thinkpad_id.ec_version_str : "unknown");
10382
10383 BUG_ON(!thinkpad_id.vendor);
10384
10385 if (thinkpad_id.model_str)
10386 pr_info("%s %s, model %s\n",
10387 (thinkpad_id.vendor == PCI_VENDOR_ID_IBM) ?
10388 "IBM" : ((thinkpad_id.vendor ==
10389 PCI_VENDOR_ID_LENOVO) ?
10390 "Lenovo" : "Unknown vendor"),
10391 thinkpad_id.model_str,
10392 (thinkpad_id.nummodel_str) ?
10393 thinkpad_id.nummodel_str : "unknown");
10394 }
10395
10396 /* Module init, exit, parameters */
10397
10398 static struct ibm_init_struct ibms_init[] __initdata = {
10399 {
10400 .data = &thinkpad_acpi_driver_data,
10401 },
10402 {
10403 .init = hotkey_init,
10404 .data = &hotkey_driver_data,
10405 },
10406 {
10407 .init = bluetooth_init,
10408 .data = &bluetooth_driver_data,
10409 },
10410 {
10411 .init = wan_init,
10412 .data = &wan_driver_data,
10413 },
10414 {
10415 .init = uwb_init,
10416 .data = &uwb_driver_data,
10417 },
10418 #ifdef CONFIG_THINKPAD_ACPI_VIDEO
10419 {
10420 .init = video_init,
10421 .base_procfs_mode = S_IRUSR,
10422 .data = &video_driver_data,
10423 },
10424 #endif
10425 {
10426 .init = kbdlight_init,
10427 .data = &kbdlight_driver_data,
10428 },
10429 {
10430 .init = light_init,
10431 .data = &light_driver_data,
10432 },
10433 {
10434 .init = cmos_init,
10435 .data = &cmos_driver_data,
10436 },
10437 {
10438 .init = led_init,
10439 .data = &led_driver_data,
10440 },
10441 {
10442 .init = beep_init,
10443 .data = &beep_driver_data,
10444 },
10445 {
10446 .init = thermal_init,
10447 .data = &thermal_driver_data,
10448 },
10449 {
10450 .init = brightness_init,
10451 .data = &brightness_driver_data,
10452 },
10453 {
10454 .init = volume_init,
10455 .data = &volume_driver_data,
10456 },
10457 {
10458 .init = fan_init,
10459 .data = &fan_driver_data,
10460 },
10461 {
10462 .init = mute_led_init,
10463 .data = &mute_led_driver_data,
10464 },
10465 {
10466 .init = tpacpi_battery_init,
10467 .data = &battery_driver_data,
10468 },
10469 {
10470 .init = tpacpi_lcdshadow_init,
10471 .data = &lcdshadow_driver_data,
10472 },
10473 {
10474 .init = tpacpi_proxsensor_init,
10475 .data = &proxsensor_driver_data,
10476 },
10477 };
10478
10479 static int __init set_ibm_param(const char *val, const struct kernel_param *kp)
10480 {
10481 unsigned int i;
10482 struct ibm_struct *ibm;
10483
10484 if (!kp || !kp->name || !val)
10485 return -EINVAL;
10486
10487 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
10488 ibm = ibms_init[i].data;
10489 WARN_ON(ibm == NULL);
10490
10491 if (!ibm || !ibm->name)
10492 continue;
10493
10494 if (strcmp(ibm->name, kp->name) == 0 && ibm->write) {
10495 if (strlen(val) > sizeof(ibms_init[i].param) - 1)
10496 return -ENOSPC;
10497 strcpy(ibms_init[i].param, val);
10498 return 0;
10499 }
10500 }
10501
10502 return -EINVAL;
10503 }
10504
10505 module_param(experimental, int, 0444);
10506 MODULE_PARM_DESC(experimental,
10507 "Enables experimental features when non-zero");
10508
10509 module_param_named(debug, dbg_level, uint, 0);
10510 MODULE_PARM_DESC(debug, "Sets debug level bit-mask");
10511
10512 module_param(force_load, bool, 0444);
10513 MODULE_PARM_DESC(force_load,
10514 "Attempts to load the driver even on a mis-identified ThinkPad when true");
10515
10516 module_param_named(fan_control, fan_control_allowed, bool, 0444);
10517 MODULE_PARM_DESC(fan_control,
10518 "Enables setting fan parameters features when true");
10519
10520 module_param_named(brightness_mode, brightness_mode, uint, 0444);
10521 MODULE_PARM_DESC(brightness_mode,
10522 "Selects brightness control strategy: 0=auto, 1=EC, 2=UCMS, 3=EC+NVRAM");
10523
10524 module_param(brightness_enable, uint, 0444);
10525 MODULE_PARM_DESC(brightness_enable,
10526 "Enables backlight control when 1, disables when 0");
10527
10528 #ifdef CONFIG_THINKPAD_ACPI_ALSA_SUPPORT
10529 module_param_named(volume_mode, volume_mode, uint, 0444);
10530 MODULE_PARM_DESC(volume_mode,
10531 "Selects volume control strategy: 0=auto, 1=EC, 2=N/A, 3=EC+NVRAM");
10532
10533 module_param_named(volume_capabilities, volume_capabilities, uint, 0444);
10534 MODULE_PARM_DESC(volume_capabilities,
10535 "Selects the mixer capabilities: 0=auto, 1=volume and mute, 2=mute only");
10536
10537 module_param_named(volume_control, volume_control_allowed, bool, 0444);
10538 MODULE_PARM_DESC(volume_control,
10539 "Enables software override for the console audio control when true");
10540
10541 module_param_named(software_mute, software_mute_requested, bool, 0444);
10542 MODULE_PARM_DESC(software_mute,
10543 "Request full software mute control");
10544
10545 /* ALSA module API parameters */
10546 module_param_named(index, alsa_index, int, 0444);
10547 MODULE_PARM_DESC(index, "ALSA index for the ACPI EC Mixer");
10548 module_param_named(id, alsa_id, charp, 0444);
10549 MODULE_PARM_DESC(id, "ALSA id for the ACPI EC Mixer");
10550 module_param_named(enable, alsa_enable, bool, 0444);
10551 MODULE_PARM_DESC(enable, "Enable the ALSA interface for the ACPI EC Mixer");
10552 #endif /* CONFIG_THINKPAD_ACPI_ALSA_SUPPORT */
10553
10554 /* The module parameter can't be read back, that's why 0 is used here */
10555 #define TPACPI_PARAM(feature) \
10556 module_param_call(feature, set_ibm_param, NULL, NULL, 0); \
10557 MODULE_PARM_DESC(feature, "Simulates thinkpad-acpi procfs command at module load, see documentation")
10558
10559 TPACPI_PARAM(hotkey);
10560 TPACPI_PARAM(bluetooth);
10561 TPACPI_PARAM(video);
10562 TPACPI_PARAM(light);
10563 TPACPI_PARAM(cmos);
10564 TPACPI_PARAM(led);
10565 TPACPI_PARAM(beep);
10566 TPACPI_PARAM(brightness);
10567 TPACPI_PARAM(volume);
10568 TPACPI_PARAM(fan);
10569
10570 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
10571 module_param(dbg_wlswemul, uint, 0444);
10572 MODULE_PARM_DESC(dbg_wlswemul, "Enables WLSW emulation");
10573 module_param_named(wlsw_state, tpacpi_wlsw_emulstate, bool, 0);
10574 MODULE_PARM_DESC(wlsw_state,
10575 "Initial state of the emulated WLSW switch");
10576
10577 module_param(dbg_bluetoothemul, uint, 0444);
10578 MODULE_PARM_DESC(dbg_bluetoothemul, "Enables bluetooth switch emulation");
10579 module_param_named(bluetooth_state, tpacpi_bluetooth_emulstate, bool, 0);
10580 MODULE_PARM_DESC(bluetooth_state,
10581 "Initial state of the emulated bluetooth switch");
10582
10583 module_param(dbg_wwanemul, uint, 0444);
10584 MODULE_PARM_DESC(dbg_wwanemul, "Enables WWAN switch emulation");
10585 module_param_named(wwan_state, tpacpi_wwan_emulstate, bool, 0);
10586 MODULE_PARM_DESC(wwan_state,
10587 "Initial state of the emulated WWAN switch");
10588
10589 module_param(dbg_uwbemul, uint, 0444);
10590 MODULE_PARM_DESC(dbg_uwbemul, "Enables UWB switch emulation");
10591 module_param_named(uwb_state, tpacpi_uwb_emulstate, bool, 0);
10592 MODULE_PARM_DESC(uwb_state,
10593 "Initial state of the emulated UWB switch");
10594 #endif
10595
10596 static void thinkpad_acpi_module_exit(void)
10597 {
10598 struct ibm_struct *ibm, *itmp;
10599
10600 tpacpi_lifecycle = TPACPI_LIFE_EXITING;
10601
10602 list_for_each_entry_safe_reverse(ibm, itmp,
10603 &tpacpi_all_drivers,
10604 all_drivers) {
10605 ibm_exit(ibm);
10606 }
10607
10608 dbg_printk(TPACPI_DBG_INIT, "finished subdriver exit path...\n");
10609
10610 if (tpacpi_inputdev) {
10611 if (tp_features.input_device_registered)
10612 input_unregister_device(tpacpi_inputdev);
10613 else
10614 input_free_device(tpacpi_inputdev);
10615 kfree(hotkey_keycode_map);
10616 }
10617
10618 if (tpacpi_hwmon)
10619 hwmon_device_unregister(tpacpi_hwmon);
10620
10621 if (tpacpi_sensors_pdev)
10622 platform_device_unregister(tpacpi_sensors_pdev);
10623 if (tpacpi_pdev)
10624 platform_device_unregister(tpacpi_pdev);
10625
10626 if (tp_features.sensors_pdrv_attrs_registered)
10627 tpacpi_remove_driver_attributes(&tpacpi_hwmon_pdriver.driver);
10628 if (tp_features.platform_drv_attrs_registered)
10629 tpacpi_remove_driver_attributes(&tpacpi_pdriver.driver);
10630
10631 if (tp_features.sensors_pdrv_registered)
10632 platform_driver_unregister(&tpacpi_hwmon_pdriver);
10633
10634 if (tp_features.platform_drv_registered)
10635 platform_driver_unregister(&tpacpi_pdriver);
10636
10637 if (proc_dir)
10638 remove_proc_entry(TPACPI_PROC_DIR, acpi_root_dir);
10639
10640 if (tpacpi_wq)
10641 destroy_workqueue(tpacpi_wq);
10642
10643 kfree(thinkpad_id.bios_version_str);
10644 kfree(thinkpad_id.ec_version_str);
10645 kfree(thinkpad_id.model_str);
10646 kfree(thinkpad_id.nummodel_str);
10647 }
10648
10649
10650 static int __init thinkpad_acpi_module_init(void)
10651 {
10652 int ret, i;
10653
10654 tpacpi_lifecycle = TPACPI_LIFE_INIT;
10655
10656 /* Driver-level probe */
10657
10658 ret = get_thinkpad_model_data(&thinkpad_id);
10659 if (ret) {
10660 pr_err("unable to get DMI data: %d\n", ret);
10661 thinkpad_acpi_module_exit();
10662 return ret;
10663 }
10664 ret = probe_for_thinkpad();
10665 if (ret) {
10666 thinkpad_acpi_module_exit();
10667 return ret;
10668 }
10669
10670 /* Driver initialization */
10671
10672 thinkpad_acpi_init_banner();
10673 tpacpi_check_outdated_fw();
10674
10675 TPACPI_ACPIHANDLE_INIT(ecrd);
10676 TPACPI_ACPIHANDLE_INIT(ecwr);
10677
10678 tpacpi_wq = create_singlethread_workqueue(TPACPI_WORKQUEUE_NAME);
10679 if (!tpacpi_wq) {
10680 thinkpad_acpi_module_exit();
10681 return -ENOMEM;
10682 }
10683
10684 proc_dir = proc_mkdir(TPACPI_PROC_DIR, acpi_root_dir);
10685 if (!proc_dir) {
10686 pr_err("unable to create proc dir " TPACPI_PROC_DIR "\n");
10687 thinkpad_acpi_module_exit();
10688 return -ENODEV;
10689 }
10690
10691 ret = platform_driver_register(&tpacpi_pdriver);
10692 if (ret) {
10693 pr_err("unable to register main platform driver\n");
10694 thinkpad_acpi_module_exit();
10695 return ret;
10696 }
10697 tp_features.platform_drv_registered = 1;
10698
10699 ret = platform_driver_register(&tpacpi_hwmon_pdriver);
10700 if (ret) {
10701 pr_err("unable to register hwmon platform driver\n");
10702 thinkpad_acpi_module_exit();
10703 return ret;
10704 }
10705 tp_features.sensors_pdrv_registered = 1;
10706
10707 ret = tpacpi_create_driver_attributes(&tpacpi_pdriver.driver);
10708 if (!ret) {
10709 tp_features.platform_drv_attrs_registered = 1;
10710 ret = tpacpi_create_driver_attributes(
10711 &tpacpi_hwmon_pdriver.driver);
10712 }
10713 if (ret) {
10714 pr_err("unable to create sysfs driver attributes\n");
10715 thinkpad_acpi_module_exit();
10716 return ret;
10717 }
10718 tp_features.sensors_pdrv_attrs_registered = 1;
10719
10720
10721 /* Device initialization */
10722 tpacpi_pdev = platform_device_register_simple(TPACPI_DRVR_NAME, -1,
10723 NULL, 0);
10724 if (IS_ERR(tpacpi_pdev)) {
10725 ret = PTR_ERR(tpacpi_pdev);
10726 tpacpi_pdev = NULL;
10727 pr_err("unable to register platform device\n");
10728 thinkpad_acpi_module_exit();
10729 return ret;
10730 }
10731 tpacpi_sensors_pdev = platform_device_register_simple(
10732 TPACPI_HWMON_DRVR_NAME,
10733 -1, NULL, 0);
10734 if (IS_ERR(tpacpi_sensors_pdev)) {
10735 ret = PTR_ERR(tpacpi_sensors_pdev);
10736 tpacpi_sensors_pdev = NULL;
10737 pr_err("unable to register hwmon platform device\n");
10738 thinkpad_acpi_module_exit();
10739 return ret;
10740 }
10741 tp_features.sensors_pdev_attrs_registered = 1;
10742 tpacpi_hwmon = hwmon_device_register_with_groups(
10743 &tpacpi_sensors_pdev->dev, TPACPI_NAME, NULL, NULL);
10744
10745 if (IS_ERR(tpacpi_hwmon)) {
10746 ret = PTR_ERR(tpacpi_hwmon);
10747 tpacpi_hwmon = NULL;
10748 pr_err("unable to register hwmon device\n");
10749 thinkpad_acpi_module_exit();
10750 return ret;
10751 }
10752 mutex_init(&tpacpi_inputdev_send_mutex);
10753 tpacpi_inputdev = input_allocate_device();
10754 if (!tpacpi_inputdev) {
10755 thinkpad_acpi_module_exit();
10756 return -ENOMEM;
10757 } else {
10758 /* Prepare input device, but don't register */
10759 tpacpi_inputdev->name = "ThinkPad Extra Buttons";
10760 tpacpi_inputdev->phys = TPACPI_DRVR_NAME "/input0";
10761 tpacpi_inputdev->id.bustype = BUS_HOST;
10762 tpacpi_inputdev->id.vendor = thinkpad_id.vendor;
10763 tpacpi_inputdev->id.product = TPACPI_HKEY_INPUT_PRODUCT;
10764 tpacpi_inputdev->id.version = TPACPI_HKEY_INPUT_VERSION;
10765 tpacpi_inputdev->dev.parent = &tpacpi_pdev->dev;
10766 }
10767
10768 /* Init subdriver dependencies */
10769 tpacpi_detect_brightness_capabilities();
10770
10771 /* Init subdrivers */
10772 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
10773 ret = ibm_init(&ibms_init[i]);
10774 if (ret >= 0 && *ibms_init[i].param)
10775 ret = ibms_init[i].data->write(ibms_init[i].param);
10776 if (ret < 0) {
10777 thinkpad_acpi_module_exit();
10778 return ret;
10779 }
10780 }
10781
10782 tpacpi_lifecycle = TPACPI_LIFE_RUNNING;
10783
10784 ret = input_register_device(tpacpi_inputdev);
10785 if (ret < 0) {
10786 pr_err("unable to register input device\n");
10787 thinkpad_acpi_module_exit();
10788 return ret;
10789 } else {
10790 tp_features.input_device_registered = 1;
10791 }
10792
10793 return 0;
10794 }
10795
10796 MODULE_ALIAS(TPACPI_DRVR_SHORTNAME);
10797
10798 /*
10799 * This will autoload the driver in almost every ThinkPad
10800 * in widespread use.
10801 *
10802 * Only _VERY_ old models, like the 240, 240x and 570 lack
10803 * the HKEY event interface.
10804 */
10805 MODULE_DEVICE_TABLE(acpi, ibm_htk_device_ids);
10806
10807 /*
10808 * DMI matching for module autoloading
10809 *
10810 * See https://thinkwiki.org/wiki/List_of_DMI_IDs
10811 * See https://thinkwiki.org/wiki/BIOS_Upgrade_Downloads
10812 *
10813 * Only models listed in thinkwiki will be supported, so add yours
10814 * if it is not there yet.
10815 */
10816 #define IBM_BIOS_MODULE_ALIAS(__type) \
10817 MODULE_ALIAS("dmi:bvnIBM:bvr" __type "ET??WW*")
10818
10819 /* Ancient thinkpad BIOSes have to be identified by
10820 * BIOS type or model number, and there are far less
10821 * BIOS types than model numbers... */
10822 IBM_BIOS_MODULE_ALIAS("I[MU]"); /* 570, 570e */
10823
10824 MODULE_AUTHOR("Borislav Deianov <borislav@users.sf.net>");
10825 MODULE_AUTHOR("Henrique de Moraes Holschuh <hmh@hmh.eng.br>");
10826 MODULE_DESCRIPTION(TPACPI_DESC);
10827 MODULE_VERSION(TPACPI_VERSION);
10828 MODULE_LICENSE("GPL");
10829
10830 module_init(thinkpad_acpi_module_init);
10831 module_exit(thinkpad_acpi_module_exit);
Linux with added FPC-III support