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PM / sleep: Asynchronous threads for suspend_noirq
[linux/fpc-iii.git] / drivers / platform / x86 / thinkpad_acpi.c
blobdefb6afc1409cc7fff0863d6829c5c26478b6a4a
1 /*
2 * thinkpad_acpi.c - ThinkPad ACPI Extras
3 *
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 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
21 * 02110-1301, USA.
22 */
23
24 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
25
26 #define TPACPI_VERSION "0.25"
27 #define TPACPI_SYSFS_VERSION 0x020700
28
29 /*
30 * Changelog:
31 * 2007-10-20 changelog trimmed down
32 *
33 * 2007-03-27 0.14 renamed to thinkpad_acpi and moved to
34 * drivers/misc.
35 *
36 * 2006-11-22 0.13 new maintainer
37 * changelog now lives in git commit history, and will
38 * not be updated further in-file.
39 *
40 * 2005-03-17 0.11 support for 600e, 770x
41 * thanks to Jamie Lentin <lentinj@dial.pipex.com>
42 *
43 * 2005-01-16 0.9 use MODULE_VERSION
44 * thanks to Henrik Brix Andersen <brix@gentoo.org>
45 * fix parameter passing on module loading
46 * thanks to Rusty Russell <rusty@rustcorp.com.au>
47 * thanks to Jim Radford <radford@blackbean.org>
48 * 2004-11-08 0.8 fix init error case, don't return from a macro
49 * thanks to Chris Wright <chrisw@osdl.org>
50 */
51
52 #include <linux/kernel.h>
53 #include <linux/module.h>
54 #include <linux/init.h>
55 #include <linux/types.h>
56 #include <linux/string.h>
57 #include <linux/list.h>
58 #include <linux/mutex.h>
59 #include <linux/sched.h>
60 #include <linux/kthread.h>
61 #include <linux/freezer.h>
62 #include <linux/delay.h>
63 #include <linux/slab.h>
64 #include <linux/nvram.h>
65 #include <linux/proc_fs.h>
66 #include <linux/seq_file.h>
67 #include <linux/sysfs.h>
68 #include <linux/backlight.h>
69 #include <linux/fb.h>
70 #include <linux/platform_device.h>
71 #include <linux/hwmon.h>
72 #include <linux/hwmon-sysfs.h>
73 #include <linux/input.h>
74 #include <linux/leds.h>
75 #include <linux/rfkill.h>
76 #include <linux/dmi.h>
77 #include <linux/jiffies.h>
78 #include <linux/workqueue.h>
79 #include <linux/acpi.h>
80 #include <linux/pci_ids.h>
81 #include <linux/thinkpad_acpi.h>
82 #include <sound/core.h>
83 #include <sound/control.h>
84 #include <sound/initval.h>
85 #include <asm/uaccess.h>
86
87 /* ThinkPad CMOS commands */
88 #define TP_CMOS_VOLUME_DOWN 0
89 #define TP_CMOS_VOLUME_UP 1
90 #define TP_CMOS_VOLUME_MUTE 2
91 #define TP_CMOS_BRIGHTNESS_UP 4
92 #define TP_CMOS_BRIGHTNESS_DOWN 5
93 #define TP_CMOS_THINKLIGHT_ON 12
94 #define TP_CMOS_THINKLIGHT_OFF 13
95
96 /* NVRAM Addresses */
97 enum tp_nvram_addr {
98 TP_NVRAM_ADDR_HK2 = 0x57,
99 TP_NVRAM_ADDR_THINKLIGHT = 0x58,
100 TP_NVRAM_ADDR_VIDEO = 0x59,
101 TP_NVRAM_ADDR_BRIGHTNESS = 0x5e,
102 TP_NVRAM_ADDR_MIXER = 0x60,
103 };
104
105 /* NVRAM bit masks */
106 enum {
107 TP_NVRAM_MASK_HKT_THINKPAD = 0x08,
108 TP_NVRAM_MASK_HKT_ZOOM = 0x20,
109 TP_NVRAM_MASK_HKT_DISPLAY = 0x40,
110 TP_NVRAM_MASK_HKT_HIBERNATE = 0x80,
111 TP_NVRAM_MASK_THINKLIGHT = 0x10,
112 TP_NVRAM_MASK_HKT_DISPEXPND = 0x30,
113 TP_NVRAM_MASK_HKT_BRIGHTNESS = 0x20,
114 TP_NVRAM_MASK_LEVEL_BRIGHTNESS = 0x0f,
115 TP_NVRAM_POS_LEVEL_BRIGHTNESS = 0,
116 TP_NVRAM_MASK_MUTE = 0x40,
117 TP_NVRAM_MASK_HKT_VOLUME = 0x80,
118 TP_NVRAM_MASK_LEVEL_VOLUME = 0x0f,
119 TP_NVRAM_POS_LEVEL_VOLUME = 0,
120 };
121
122 /* Misc NVRAM-related */
123 enum {
124 TP_NVRAM_LEVEL_VOLUME_MAX = 14,
125 };
126
127 /* ACPI HIDs */
128 #define TPACPI_ACPI_IBM_HKEY_HID "IBM0068"
129 #define TPACPI_ACPI_LENOVO_HKEY_HID "LEN0068"
130 #define TPACPI_ACPI_EC_HID "PNP0C09"
131
132 /* Input IDs */
133 #define TPACPI_HKEY_INPUT_PRODUCT 0x5054 /* "TP" */
134 #define TPACPI_HKEY_INPUT_VERSION 0x4101
135
136 /* ACPI \WGSV commands */
137 enum {
138 TP_ACPI_WGSV_GET_STATE = 0x01, /* Get state information */
139 TP_ACPI_WGSV_PWR_ON_ON_RESUME = 0x02, /* Resume WWAN powered on */
140 TP_ACPI_WGSV_PWR_OFF_ON_RESUME = 0x03, /* Resume WWAN powered off */
141 TP_ACPI_WGSV_SAVE_STATE = 0x04, /* Save state for S4/S5 */
142 };
143
144 /* TP_ACPI_WGSV_GET_STATE bits */
145 enum {
146 TP_ACPI_WGSV_STATE_WWANEXIST = 0x0001, /* WWAN hw available */
147 TP_ACPI_WGSV_STATE_WWANPWR = 0x0002, /* WWAN radio enabled */
148 TP_ACPI_WGSV_STATE_WWANPWRRES = 0x0004, /* WWAN state at resume */
149 TP_ACPI_WGSV_STATE_WWANBIOSOFF = 0x0008, /* WWAN disabled in BIOS */
150 TP_ACPI_WGSV_STATE_BLTHEXIST = 0x0001, /* BLTH hw available */
151 TP_ACPI_WGSV_STATE_BLTHPWR = 0x0002, /* BLTH radio enabled */
152 TP_ACPI_WGSV_STATE_BLTHPWRRES = 0x0004, /* BLTH state at resume */
153 TP_ACPI_WGSV_STATE_BLTHBIOSOFF = 0x0008, /* BLTH disabled in BIOS */
154 TP_ACPI_WGSV_STATE_UWBEXIST = 0x0010, /* UWB hw available */
155 TP_ACPI_WGSV_STATE_UWBPWR = 0x0020, /* UWB radio enabled */
156 };
157
158 /* HKEY events */
159 enum tpacpi_hkey_event_t {
160 /* Hotkey-related */
161 TP_HKEY_EV_HOTKEY_BASE = 0x1001, /* first hotkey (FN+F1) */
162 TP_HKEY_EV_BRGHT_UP = 0x1010, /* Brightness up */
163 TP_HKEY_EV_BRGHT_DOWN = 0x1011, /* Brightness down */
164 TP_HKEY_EV_VOL_UP = 0x1015, /* Volume up or unmute */
165 TP_HKEY_EV_VOL_DOWN = 0x1016, /* Volume down or unmute */
166 TP_HKEY_EV_VOL_MUTE = 0x1017, /* Mixer output mute */
167
168 /* Reasons for waking up from S3/S4 */
169 TP_HKEY_EV_WKUP_S3_UNDOCK = 0x2304, /* undock requested, S3 */
170 TP_HKEY_EV_WKUP_S4_UNDOCK = 0x2404, /* undock requested, S4 */
171 TP_HKEY_EV_WKUP_S3_BAYEJ = 0x2305, /* bay ejection req, S3 */
172 TP_HKEY_EV_WKUP_S4_BAYEJ = 0x2405, /* bay ejection req, S4 */
173 TP_HKEY_EV_WKUP_S3_BATLOW = 0x2313, /* battery empty, S3 */
174 TP_HKEY_EV_WKUP_S4_BATLOW = 0x2413, /* battery empty, S4 */
175
176 /* Auto-sleep after eject request */
177 TP_HKEY_EV_BAYEJ_ACK = 0x3003, /* bay ejection complete */
178 TP_HKEY_EV_UNDOCK_ACK = 0x4003, /* undock complete */
179
180 /* Misc bay events */
181 TP_HKEY_EV_OPTDRV_EJ = 0x3006, /* opt. drive tray ejected */
182 TP_HKEY_EV_HOTPLUG_DOCK = 0x4010, /* docked into hotplug dock
183 or port replicator */
184 TP_HKEY_EV_HOTPLUG_UNDOCK = 0x4011, /* undocked from hotplug
185 dock or port replicator */
186
187 /* User-interface events */
188 TP_HKEY_EV_LID_CLOSE = 0x5001, /* laptop lid closed */
189 TP_HKEY_EV_LID_OPEN = 0x5002, /* laptop lid opened */
190 TP_HKEY_EV_TABLET_TABLET = 0x5009, /* tablet swivel up */
191 TP_HKEY_EV_TABLET_NOTEBOOK = 0x500a, /* tablet swivel down */
192 TP_HKEY_EV_PEN_INSERTED = 0x500b, /* tablet pen inserted */
193 TP_HKEY_EV_PEN_REMOVED = 0x500c, /* tablet pen removed */
194 TP_HKEY_EV_BRGHT_CHANGED = 0x5010, /* backlight control event */
195
196 /* Key-related user-interface events */
197 TP_HKEY_EV_KEY_NUMLOCK = 0x6000, /* NumLock key pressed */
198 TP_HKEY_EV_KEY_FN = 0x6005, /* Fn key pressed? E420 */
199
200 /* Thermal events */
201 TP_HKEY_EV_ALARM_BAT_HOT = 0x6011, /* battery too hot */
202 TP_HKEY_EV_ALARM_BAT_XHOT = 0x6012, /* battery critically hot */
203 TP_HKEY_EV_ALARM_SENSOR_HOT = 0x6021, /* sensor too hot */
204 TP_HKEY_EV_ALARM_SENSOR_XHOT = 0x6022, /* sensor critically hot */
205 TP_HKEY_EV_THM_TABLE_CHANGED = 0x6030, /* thermal table changed */
206
207 /* AC-related events */
208 TP_HKEY_EV_AC_CHANGED = 0x6040, /* AC status changed */
209
210 /* Misc */
211 TP_HKEY_EV_RFKILL_CHANGED = 0x7000, /* rfkill switch changed */
212 };
213
214 /****************************************************************************
215 * Main driver
216 */
217
218 #define TPACPI_NAME "thinkpad"
219 #define TPACPI_DESC "ThinkPad ACPI Extras"
220 #define TPACPI_FILE TPACPI_NAME "_acpi"
221 #define TPACPI_URL "http://ibm-acpi.sf.net/"
222 #define TPACPI_MAIL "ibm-acpi-devel@lists.sourceforge.net"
223
224 #define TPACPI_PROC_DIR "ibm"
225 #define TPACPI_ACPI_EVENT_PREFIX "ibm"
226 #define TPACPI_DRVR_NAME TPACPI_FILE
227 #define TPACPI_DRVR_SHORTNAME "tpacpi"
228 #define TPACPI_HWMON_DRVR_NAME TPACPI_NAME "_hwmon"
229
230 #define TPACPI_NVRAM_KTHREAD_NAME "ktpacpi_nvramd"
231 #define TPACPI_WORKQUEUE_NAME "ktpacpid"
232
233 #define TPACPI_MAX_ACPI_ARGS 3
234
235 /* Debugging printk groups */
236 #define TPACPI_DBG_ALL 0xffff
237 #define TPACPI_DBG_DISCLOSETASK 0x8000
238 #define TPACPI_DBG_INIT 0x0001
239 #define TPACPI_DBG_EXIT 0x0002
240 #define TPACPI_DBG_RFKILL 0x0004
241 #define TPACPI_DBG_HKEY 0x0008
242 #define TPACPI_DBG_FAN 0x0010
243 #define TPACPI_DBG_BRGHT 0x0020
244 #define TPACPI_DBG_MIXER 0x0040
245
246 #define onoff(status, bit) ((status) & (1 << (bit)) ? "on" : "off")
247 #define enabled(status, bit) ((status) & (1 << (bit)) ? "enabled" : "disabled")
248 #define strlencmp(a, b) (strncmp((a), (b), strlen(b)))
249
250
251 /****************************************************************************
252 * Driver-wide structs and misc. variables
253 */
254
255 struct ibm_struct;
256
257 struct tp_acpi_drv_struct {
258 const struct acpi_device_id *hid;
259 struct acpi_driver *driver;
260
261 void (*notify) (struct ibm_struct *, u32);
262 acpi_handle *handle;
263 u32 type;
264 struct acpi_device *device;
265 };
266
267 struct ibm_struct {
268 char *name;
269
270 int (*read) (struct seq_file *);
271 int (*write) (char *);
272 void (*exit) (void);
273 void (*resume) (void);
274 void (*suspend) (void);
275 void (*shutdown) (void);
276
277 struct list_head all_drivers;
278
279 struct tp_acpi_drv_struct *acpi;
280
281 struct {
282 u8 acpi_driver_registered:1;
283 u8 acpi_notify_installed:1;
284 u8 proc_created:1;
285 u8 init_called:1;
286 u8 experimental:1;
287 } flags;
288 };
289
290 struct ibm_init_struct {
291 char param[32];
292
293 int (*init) (struct ibm_init_struct *);
294 umode_t base_procfs_mode;
295 struct ibm_struct *data;
296 };
297
298 static struct {
299 u32 bluetooth:1;
300 u32 hotkey:1;
301 u32 hotkey_mask:1;
302 u32 hotkey_wlsw:1;
303 u32 hotkey_tablet:1;
304 u32 light:1;
305 u32 light_status:1;
306 u32 bright_acpimode:1;
307 u32 bright_unkfw:1;
308 u32 wan:1;
309 u32 uwb:1;
310 u32 fan_ctrl_status_undef:1;
311 u32 second_fan:1;
312 u32 beep_needs_two_args:1;
313 u32 mixer_no_level_control:1;
314 u32 input_device_registered:1;
315 u32 platform_drv_registered:1;
316 u32 platform_drv_attrs_registered:1;
317 u32 sensors_pdrv_registered:1;
318 u32 sensors_pdrv_attrs_registered:1;
319 u32 sensors_pdev_attrs_registered:1;
320 u32 hotkey_poll_active:1;
321 } tp_features;
322
323 static struct {
324 u16 hotkey_mask_ff:1;
325 u16 volume_ctrl_forbidden:1;
326 } tp_warned;
327
328 struct thinkpad_id_data {
329 unsigned int vendor; /* ThinkPad vendor:
330 * PCI_VENDOR_ID_IBM/PCI_VENDOR_ID_LENOVO */
331
332 char *bios_version_str; /* Something like 1ZET51WW (1.03z) */
333 char *ec_version_str; /* Something like 1ZHT51WW-1.04a */
334
335 u16 bios_model; /* 1Y = 0x5931, 0 = unknown */
336 u16 ec_model;
337 u16 bios_release; /* 1ZETK1WW = 0x314b, 0 = unknown */
338 u16 ec_release;
339
340 char *model_str; /* ThinkPad T43 */
341 char *nummodel_str; /* 9384A9C for a 9384-A9C model */
342 };
343 static struct thinkpad_id_data thinkpad_id;
344
345 static enum {
346 TPACPI_LIFE_INIT = 0,
347 TPACPI_LIFE_RUNNING,
348 TPACPI_LIFE_EXITING,
349 } tpacpi_lifecycle;
350
351 static int experimental;
352 static u32 dbg_level;
353
354 static struct workqueue_struct *tpacpi_wq;
355
356 enum led_status_t {
357 TPACPI_LED_OFF = 0,
358 TPACPI_LED_ON,
359 TPACPI_LED_BLINK,
360 };
361
362 /* Special LED class that can defer work */
363 struct tpacpi_led_classdev {
364 struct led_classdev led_classdev;
365 struct work_struct work;
366 enum led_status_t new_state;
367 int led;
368 };
369
370 /* brightness level capabilities */
371 static unsigned int bright_maxlvl; /* 0 = unknown */
372
373 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
374 static int dbg_wlswemul;
375 static bool tpacpi_wlsw_emulstate;
376 static int dbg_bluetoothemul;
377 static bool tpacpi_bluetooth_emulstate;
378 static int dbg_wwanemul;
379 static bool tpacpi_wwan_emulstate;
380 static int dbg_uwbemul;
381 static bool tpacpi_uwb_emulstate;
382 #endif
383
384
385 /*************************************************************************
386 * Debugging helpers
387 */
388
389 #define dbg_printk(a_dbg_level, format, arg...) \
390 do { \
391 if (dbg_level & (a_dbg_level)) \
392 printk(KERN_DEBUG pr_fmt("%s: " format), \
393 __func__, ##arg); \
394 } while (0)
395
396 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
397 #define vdbg_printk dbg_printk
398 static const char *str_supported(int is_supported);
399 #else
400 static inline const char *str_supported(int is_supported) { return ""; }
401 #define vdbg_printk(a_dbg_level, format, arg...) \
402 no_printk(format, ##arg)
403 #endif
404
405 static void tpacpi_log_usertask(const char * const what)
406 {
407 printk(KERN_DEBUG pr_fmt("%s: access by process with PID %d\n"),
408 what, task_tgid_vnr(current));
409 }
410
411 #define tpacpi_disclose_usertask(what, format, arg...) \
412 do { \
413 if (unlikely((dbg_level & TPACPI_DBG_DISCLOSETASK) && \
414 (tpacpi_lifecycle == TPACPI_LIFE_RUNNING))) { \
415 printk(KERN_DEBUG pr_fmt("%s: PID %d: " format), \
416 what, task_tgid_vnr(current), ## arg); \
417 } \
418 } while (0)
419
420 /*
421 * Quirk handling helpers
422 *
423 * ThinkPad IDs and versions seen in the field so far
424 * are two-characters from the set [0-9A-Z], i.e. base 36.
425 *
426 * We use values well outside that range as specials.
427 */
428
429 #define TPACPI_MATCH_ANY 0xffffU
430 #define TPACPI_MATCH_UNKNOWN 0U
431
432 /* TPID('1', 'Y') == 0x5931 */
433 #define TPID(__c1, __c2) (((__c2) << 8) | (__c1))
434
435 #define TPACPI_Q_IBM(__id1, __id2, __quirk) \
436 { .vendor = PCI_VENDOR_ID_IBM, \
437 .bios = TPID(__id1, __id2), \
438 .ec = TPACPI_MATCH_ANY, \
439 .quirks = (__quirk) }
440
441 #define TPACPI_Q_LNV(__id1, __id2, __quirk) \
442 { .vendor = PCI_VENDOR_ID_LENOVO, \
443 .bios = TPID(__id1, __id2), \
444 .ec = TPACPI_MATCH_ANY, \
445 .quirks = (__quirk) }
446
447 #define TPACPI_QEC_LNV(__id1, __id2, __quirk) \
448 { .vendor = PCI_VENDOR_ID_LENOVO, \
449 .bios = TPACPI_MATCH_ANY, \
450 .ec = TPID(__id1, __id2), \
451 .quirks = (__quirk) }
452
453 struct tpacpi_quirk {
454 unsigned int vendor;
455 u16 bios;
456 u16 ec;
457 unsigned long quirks;
458 };
459
460 /**
461 * tpacpi_check_quirks() - search BIOS/EC version on a list
462 * @qlist: array of &struct tpacpi_quirk
463 * @qlist_size: number of elements in @qlist
464 *
465 * Iterates over a quirks list until one is found that matches the
466 * ThinkPad's vendor, BIOS and EC model.
467 *
468 * Returns 0 if nothing matches, otherwise returns the quirks field of
469 * the matching &struct tpacpi_quirk entry.
470 *
471 * The match criteria is: vendor, ec and bios much match.
472 */
473 static unsigned long __init tpacpi_check_quirks(
474 const struct tpacpi_quirk *qlist,
475 unsigned int qlist_size)
476 {
477 while (qlist_size) {
478 if ((qlist->vendor == thinkpad_id.vendor ||
479 qlist->vendor == TPACPI_MATCH_ANY) &&
480 (qlist->bios == thinkpad_id.bios_model ||
481 qlist->bios == TPACPI_MATCH_ANY) &&
482 (qlist->ec == thinkpad_id.ec_model ||
483 qlist->ec == TPACPI_MATCH_ANY))
484 return qlist->quirks;
485
486 qlist_size--;
487 qlist++;
488 }
489 return 0;
490 }
491
492 static inline bool __pure __init tpacpi_is_lenovo(void)
493 {
494 return thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO;
495 }
496
497 static inline bool __pure __init tpacpi_is_ibm(void)
498 {
499 return thinkpad_id.vendor == PCI_VENDOR_ID_IBM;
500 }
501
502 /****************************************************************************
503 ****************************************************************************
504 *
505 * ACPI Helpers and device model
506 *
507 ****************************************************************************
508 ****************************************************************************/
509
510 /*************************************************************************
511 * ACPI basic handles
512 */
513
514 static acpi_handle root_handle;
515 static acpi_handle ec_handle;
516
517 #define TPACPI_HANDLE(object, parent, paths...) \
518 static acpi_handle object##_handle; \
519 static const acpi_handle * const object##_parent __initconst = \
520 &parent##_handle; \
521 static char *object##_paths[] __initdata = { paths }
522
523 TPACPI_HANDLE(ecrd, ec, "ECRD"); /* 570 */
524 TPACPI_HANDLE(ecwr, ec, "ECWR"); /* 570 */
525
526 TPACPI_HANDLE(cmos, root, "\\UCMS", /* R50, R50e, R50p, R51, */
527 /* T4x, X31, X40 */
528 "\\CMOS", /* A3x, G4x, R32, T23, T30, X22-24, X30 */
529 "\\CMS", /* R40, R40e */
530 ); /* all others */
531
532 TPACPI_HANDLE(hkey, ec, "\\_SB.HKEY", /* 600e/x, 770e, 770x */
533 "^HKEY", /* R30, R31 */
534 "HKEY", /* all others */
535 ); /* 570 */
536
537 /*************************************************************************
538 * ACPI helpers
539 */
540
541 static int acpi_evalf(acpi_handle handle,
542 int *res, char *method, char *fmt, ...)
543 {
544 char *fmt0 = fmt;
545 struct acpi_object_list params;
546 union acpi_object in_objs[TPACPI_MAX_ACPI_ARGS];
547 struct acpi_buffer result, *resultp;
548 union acpi_object out_obj;
549 acpi_status status;
550 va_list ap;
551 char res_type;
552 int success;
553 int quiet;
554
555 if (!*fmt) {
556 pr_err("acpi_evalf() called with empty format\n");
557 return 0;
558 }
559
560 if (*fmt == 'q') {
561 quiet = 1;
562 fmt++;
563 } else
564 quiet = 0;
565
566 res_type = *(fmt++);
567
568 params.count = 0;
569 params.pointer = &in_objs[0];
570
571 va_start(ap, fmt);
572 while (*fmt) {
573 char c = *(fmt++);
574 switch (c) {
575 case 'd': /* int */
576 in_objs[params.count].integer.value = va_arg(ap, int);
577 in_objs[params.count++].type = ACPI_TYPE_INTEGER;
578 break;
579 /* add more types as needed */
580 default:
581 pr_err("acpi_evalf() called "
582 "with invalid format character '%c'\n", c);
583 va_end(ap);
584 return 0;
585 }
586 }
587 va_end(ap);
588
589 if (res_type != 'v') {
590 result.length = sizeof(out_obj);
591 result.pointer = &out_obj;
592 resultp = &result;
593 } else
594 resultp = NULL;
595
596 status = acpi_evaluate_object(handle, method, &params, resultp);
597
598 switch (res_type) {
599 case 'd': /* int */
600 success = (status == AE_OK &&
601 out_obj.type == ACPI_TYPE_INTEGER);
602 if (success && res)
603 *res = out_obj.integer.value;
604 break;
605 case 'v': /* void */
606 success = status == AE_OK;
607 break;
608 /* add more types as needed */
609 default:
610 pr_err("acpi_evalf() called "
611 "with invalid format character '%c'\n", res_type);
612 return 0;
613 }
614
615 if (!success && !quiet)
616 pr_err("acpi_evalf(%s, %s, ...) failed: %s\n",
617 method, fmt0, acpi_format_exception(status));
618
619 return success;
620 }
621
622 static int acpi_ec_read(int i, u8 *p)
623 {
624 int v;
625
626 if (ecrd_handle) {
627 if (!acpi_evalf(ecrd_handle, &v, NULL, "dd", i))
628 return 0;
629 *p = v;
630 } else {
631 if (ec_read(i, p) < 0)
632 return 0;
633 }
634
635 return 1;
636 }
637
638 static int acpi_ec_write(int i, u8 v)
639 {
640 if (ecwr_handle) {
641 if (!acpi_evalf(ecwr_handle, NULL, NULL, "vdd", i, v))
642 return 0;
643 } else {
644 if (ec_write(i, v) < 0)
645 return 0;
646 }
647
648 return 1;
649 }
650
651 static int issue_thinkpad_cmos_command(int cmos_cmd)
652 {
653 if (!cmos_handle)
654 return -ENXIO;
655
656 if (!acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd))
657 return -EIO;
658
659 return 0;
660 }
661
662 /*************************************************************************
663 * ACPI device model
664 */
665
666 #define TPACPI_ACPIHANDLE_INIT(object) \
667 drv_acpi_handle_init(#object, &object##_handle, *object##_parent, \
668 object##_paths, ARRAY_SIZE(object##_paths))
669
670 static void __init drv_acpi_handle_init(const char *name,
671 acpi_handle *handle, const acpi_handle parent,
672 char **paths, const int num_paths)
673 {
674 int i;
675 acpi_status status;
676
677 vdbg_printk(TPACPI_DBG_INIT, "trying to locate ACPI handle for %s\n",
678 name);
679
680 for (i = 0; i < num_paths; i++) {
681 status = acpi_get_handle(parent, paths[i], handle);
682 if (ACPI_SUCCESS(status)) {
683 dbg_printk(TPACPI_DBG_INIT,
684 "Found ACPI handle %s for %s\n",
685 paths[i], name);
686 return;
687 }
688 }
689
690 vdbg_printk(TPACPI_DBG_INIT, "ACPI handle for %s not found\n",
691 name);
692 *handle = NULL;
693 }
694
695 static acpi_status __init tpacpi_acpi_handle_locate_callback(acpi_handle handle,
696 u32 level, void *context, void **return_value)
697 {
698 struct acpi_device *dev;
699 if (!strcmp(context, "video")) {
700 if (acpi_bus_get_device(handle, &dev))
701 return AE_OK;
702 if (strcmp(ACPI_VIDEO_HID, acpi_device_hid(dev)))
703 return AE_OK;
704 }
705
706 *(acpi_handle *)return_value = handle;
707
708 return AE_CTRL_TERMINATE;
709 }
710
711 static void __init tpacpi_acpi_handle_locate(const char *name,
712 const char *hid,
713 acpi_handle *handle)
714 {
715 acpi_status status;
716 acpi_handle device_found;
717
718 BUG_ON(!name || !handle);
719 vdbg_printk(TPACPI_DBG_INIT,
720 "trying to locate ACPI handle for %s, using HID %s\n",
721 name, hid ? hid : "NULL");
722
723 memset(&device_found, 0, sizeof(device_found));
724 status = acpi_get_devices(hid, tpacpi_acpi_handle_locate_callback,
725 (void *)name, &device_found);
726
727 *handle = NULL;
728
729 if (ACPI_SUCCESS(status)) {
730 *handle = device_found;
731 dbg_printk(TPACPI_DBG_INIT,
732 "Found ACPI handle for %s\n", name);
733 } else {
734 vdbg_printk(TPACPI_DBG_INIT,
735 "Could not locate an ACPI handle for %s: %s\n",
736 name, acpi_format_exception(status));
737 }
738 }
739
740 static void dispatch_acpi_notify(acpi_handle handle, u32 event, void *data)
741 {
742 struct ibm_struct *ibm = data;
743
744 if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
745 return;
746
747 if (!ibm || !ibm->acpi || !ibm->acpi->notify)
748 return;
749
750 ibm->acpi->notify(ibm, event);
751 }
752
753 static int __init setup_acpi_notify(struct ibm_struct *ibm)
754 {
755 acpi_status status;
756 int rc;
757
758 BUG_ON(!ibm->acpi);
759
760 if (!*ibm->acpi->handle)
761 return 0;
762
763 vdbg_printk(TPACPI_DBG_INIT,
764 "setting up ACPI notify for %s\n", ibm->name);
765
766 rc = acpi_bus_get_device(*ibm->acpi->handle, &ibm->acpi->device);
767 if (rc < 0) {
768 pr_err("acpi_bus_get_device(%s) failed: %d\n", ibm->name, rc);
769 return -ENODEV;
770 }
771
772 ibm->acpi->device->driver_data = ibm;
773 sprintf(acpi_device_class(ibm->acpi->device), "%s/%s",
774 TPACPI_ACPI_EVENT_PREFIX,
775 ibm->name);
776
777 status = acpi_install_notify_handler(*ibm->acpi->handle,
778 ibm->acpi->type, dispatch_acpi_notify, ibm);
779 if (ACPI_FAILURE(status)) {
780 if (status == AE_ALREADY_EXISTS) {
781 pr_notice("another device driver is already "
782 "handling %s events\n", ibm->name);
783 } else {
784 pr_err("acpi_install_notify_handler(%s) failed: %s\n",
785 ibm->name, acpi_format_exception(status));
786 }
787 return -ENODEV;
788 }
789 ibm->flags.acpi_notify_installed = 1;
790 return 0;
791 }
792
793 static int __init tpacpi_device_add(struct acpi_device *device)
794 {
795 return 0;
796 }
797
798 static int __init register_tpacpi_subdriver(struct ibm_struct *ibm)
799 {
800 int rc;
801
802 dbg_printk(TPACPI_DBG_INIT,
803 "registering %s as an ACPI driver\n", ibm->name);
804
805 BUG_ON(!ibm->acpi);
806
807 ibm->acpi->driver = kzalloc(sizeof(struct acpi_driver), GFP_KERNEL);
808 if (!ibm->acpi->driver) {
809 pr_err("failed to allocate memory for ibm->acpi->driver\n");
810 return -ENOMEM;
811 }
812
813 sprintf(ibm->acpi->driver->name, "%s_%s", TPACPI_NAME, ibm->name);
814 ibm->acpi->driver->ids = ibm->acpi->hid;
815
816 ibm->acpi->driver->ops.add = &tpacpi_device_add;
817
818 rc = acpi_bus_register_driver(ibm->acpi->driver);
819 if (rc < 0) {
820 pr_err("acpi_bus_register_driver(%s) failed: %d\n",
821 ibm->name, rc);
822 kfree(ibm->acpi->driver);
823 ibm->acpi->driver = NULL;
824 } else if (!rc)
825 ibm->flags.acpi_driver_registered = 1;
826
827 return rc;
828 }
829
830
831 /****************************************************************************
832 ****************************************************************************
833 *
834 * Procfs Helpers
835 *
836 ****************************************************************************
837 ****************************************************************************/
838
839 static int dispatch_proc_show(struct seq_file *m, void *v)
840 {
841 struct ibm_struct *ibm = m->private;
842
843 if (!ibm || !ibm->read)
844 return -EINVAL;
845 return ibm->read(m);
846 }
847
848 static int dispatch_proc_open(struct inode *inode, struct file *file)
849 {
850 return single_open(file, dispatch_proc_show, PDE_DATA(inode));
851 }
852
853 static ssize_t dispatch_proc_write(struct file *file,
854 const char __user *userbuf,
855 size_t count, loff_t *pos)
856 {
857 struct ibm_struct *ibm = PDE_DATA(file_inode(file));
858 char *kernbuf;
859 int ret;
860
861 if (!ibm || !ibm->write)
862 return -EINVAL;
863 if (count > PAGE_SIZE - 2)
864 return -EINVAL;
865
866 kernbuf = kmalloc(count + 2, GFP_KERNEL);
867 if (!kernbuf)
868 return -ENOMEM;
869
870 if (copy_from_user(kernbuf, userbuf, count)) {
871 kfree(kernbuf);
872 return -EFAULT;
873 }
874
875 kernbuf[count] = 0;
876 strcat(kernbuf, ",");
877 ret = ibm->write(kernbuf);
878 if (ret == 0)
879 ret = count;
880
881 kfree(kernbuf);
882
883 return ret;
884 }
885
886 static const struct file_operations dispatch_proc_fops = {
887 .owner = THIS_MODULE,
888 .open = dispatch_proc_open,
889 .read = seq_read,
890 .llseek = seq_lseek,
891 .release = single_release,
892 .write = dispatch_proc_write,
893 };
894
895 static char *next_cmd(char **cmds)
896 {
897 char *start = *cmds;
898 char *end;
899
900 while ((end = strchr(start, ',')) && end == start)
901 start = end + 1;
902
903 if (!end)
904 return NULL;
905
906 *end = 0;
907 *cmds = end + 1;
908 return start;
909 }
910
911
912 /****************************************************************************
913 ****************************************************************************
914 *
915 * Device model: input, hwmon and platform
916 *
917 ****************************************************************************
918 ****************************************************************************/
919
920 static struct platform_device *tpacpi_pdev;
921 static struct platform_device *tpacpi_sensors_pdev;
922 static struct device *tpacpi_hwmon;
923 static struct input_dev *tpacpi_inputdev;
924 static struct mutex tpacpi_inputdev_send_mutex;
925 static LIST_HEAD(tpacpi_all_drivers);
926
927 #ifdef CONFIG_PM_SLEEP
928 static int tpacpi_suspend_handler(struct device *dev)
929 {
930 struct ibm_struct *ibm, *itmp;
931
932 list_for_each_entry_safe(ibm, itmp,
933 &tpacpi_all_drivers,
934 all_drivers) {
935 if (ibm->suspend)
936 (ibm->suspend)();
937 }
938
939 return 0;
940 }
941
942 static int tpacpi_resume_handler(struct device *dev)
943 {
944 struct ibm_struct *ibm, *itmp;
945
946 list_for_each_entry_safe(ibm, itmp,
947 &tpacpi_all_drivers,
948 all_drivers) {
949 if (ibm->resume)
950 (ibm->resume)();
951 }
952
953 return 0;
954 }
955 #endif
956
957 static SIMPLE_DEV_PM_OPS(tpacpi_pm,
958 tpacpi_suspend_handler, tpacpi_resume_handler);
959
960 static void tpacpi_shutdown_handler(struct platform_device *pdev)
961 {
962 struct ibm_struct *ibm, *itmp;
963
964 list_for_each_entry_safe(ibm, itmp,
965 &tpacpi_all_drivers,
966 all_drivers) {
967 if (ibm->shutdown)
968 (ibm->shutdown)();
969 }
970 }
971
972 static struct platform_driver tpacpi_pdriver = {
973 .driver = {
974 .name = TPACPI_DRVR_NAME,
975 .owner = THIS_MODULE,
976 .pm = &tpacpi_pm,
977 },
978 .shutdown = tpacpi_shutdown_handler,
979 };
980
981 static struct platform_driver tpacpi_hwmon_pdriver = {
982 .driver = {
983 .name = TPACPI_HWMON_DRVR_NAME,
984 .owner = THIS_MODULE,
985 },
986 };
987
988 /*************************************************************************
989 * sysfs support helpers
990 */
991
992 struct attribute_set {
993 unsigned int members, max_members;
994 struct attribute_group group;
995 };
996
997 struct attribute_set_obj {
998 struct attribute_set s;
999 struct attribute *a;
1000 } __attribute__((packed));
1001
1002 static struct attribute_set *create_attr_set(unsigned int max_members,
1003 const char *name)
1004 {
1005 struct attribute_set_obj *sobj;
1006
1007 if (max_members == 0)
1008 return NULL;
1009
1010 /* Allocates space for implicit NULL at the end too */
1011 sobj = kzalloc(sizeof(struct attribute_set_obj) +
1012 max_members * sizeof(struct attribute *),
1013 GFP_KERNEL);
1014 if (!sobj)
1015 return NULL;
1016 sobj->s.max_members = max_members;
1017 sobj->s.group.attrs = &sobj->a;
1018 sobj->s.group.name = name;
1019
1020 return &sobj->s;
1021 }
1022
1023 #define destroy_attr_set(_set) \
1024 kfree(_set);
1025
1026 /* not multi-threaded safe, use it in a single thread per set */
1027 static int add_to_attr_set(struct attribute_set *s, struct attribute *attr)
1028 {
1029 if (!s || !attr)
1030 return -EINVAL;
1031
1032 if (s->members >= s->max_members)
1033 return -ENOMEM;
1034
1035 s->group.attrs[s->members] = attr;
1036 s->members++;
1037
1038 return 0;
1039 }
1040
1041 static int add_many_to_attr_set(struct attribute_set *s,
1042 struct attribute **attr,
1043 unsigned int count)
1044 {
1045 int i, res;
1046
1047 for (i = 0; i < count; i++) {
1048 res = add_to_attr_set(s, attr[i]);
1049 if (res)
1050 return res;
1051 }
1052
1053 return 0;
1054 }
1055
1056 static void delete_attr_set(struct attribute_set *s, struct kobject *kobj)
1057 {
1058 sysfs_remove_group(kobj, &s->group);
1059 destroy_attr_set(s);
1060 }
1061
1062 #define register_attr_set_with_sysfs(_attr_set, _kobj) \
1063 sysfs_create_group(_kobj, &_attr_set->group)
1064
1065 static int parse_strtoul(const char *buf,
1066 unsigned long max, unsigned long *value)
1067 {
1068 char *endp;
1069
1070 *value = simple_strtoul(skip_spaces(buf), &endp, 0);
1071 endp = skip_spaces(endp);
1072 if (*endp || *value > max)
1073 return -EINVAL;
1074
1075 return 0;
1076 }
1077
1078 static void tpacpi_disable_brightness_delay(void)
1079 {
1080 if (acpi_evalf(hkey_handle, NULL, "PWMS", "qvd", 0))
1081 pr_notice("ACPI backlight control delay disabled\n");
1082 }
1083
1084 static void printk_deprecated_attribute(const char * const what,
1085 const char * const details)
1086 {
1087 tpacpi_log_usertask("deprecated sysfs attribute");
1088 pr_warn("WARNING: sysfs attribute %s is deprecated and "
1089 "will be removed. %s\n",
1090 what, details);
1091 }
1092
1093 /*************************************************************************
1094 * rfkill and radio control support helpers
1095 */
1096
1097 /*
1098 * ThinkPad-ACPI firmware handling model:
1099 *
1100 * WLSW (master wireless switch) is event-driven, and is common to all
1101 * firmware-controlled radios. It cannot be controlled, just monitored,
1102 * as expected. It overrides all radio state in firmware
1103 *
1104 * The kernel, a masked-off hotkey, and WLSW can change the radio state
1105 * (TODO: verify how WLSW interacts with the returned radio state).
1106 *
1107 * The only time there are shadow radio state changes, is when
1108 * masked-off hotkeys are used.
1109 */
1110
1111 /*
1112 * Internal driver API for radio state:
1113 *
1114 * int: < 0 = error, otherwise enum tpacpi_rfkill_state
1115 * bool: true means radio blocked (off)
1116 */
1117 enum tpacpi_rfkill_state {
1118 TPACPI_RFK_RADIO_OFF = 0,
1119 TPACPI_RFK_RADIO_ON
1120 };
1121
1122 /* rfkill switches */
1123 enum tpacpi_rfk_id {
1124 TPACPI_RFK_BLUETOOTH_SW_ID = 0,
1125 TPACPI_RFK_WWAN_SW_ID,
1126 TPACPI_RFK_UWB_SW_ID,
1127 TPACPI_RFK_SW_MAX
1128 };
1129
1130 static const char *tpacpi_rfkill_names[] = {
1131 [TPACPI_RFK_BLUETOOTH_SW_ID] = "bluetooth",
1132 [TPACPI_RFK_WWAN_SW_ID] = "wwan",
1133 [TPACPI_RFK_UWB_SW_ID] = "uwb",
1134 [TPACPI_RFK_SW_MAX] = NULL
1135 };
1136
1137 /* ThinkPad-ACPI rfkill subdriver */
1138 struct tpacpi_rfk {
1139 struct rfkill *rfkill;
1140 enum tpacpi_rfk_id id;
1141 const struct tpacpi_rfk_ops *ops;
1142 };
1143
1144 struct tpacpi_rfk_ops {
1145 /* firmware interface */
1146 int (*get_status)(void);
1147 int (*set_status)(const enum tpacpi_rfkill_state);
1148 };
1149
1150 static struct tpacpi_rfk *tpacpi_rfkill_switches[TPACPI_RFK_SW_MAX];
1151
1152 /* Query FW and update rfkill sw state for a given rfkill switch */
1153 static int tpacpi_rfk_update_swstate(const struct tpacpi_rfk *tp_rfk)
1154 {
1155 int status;
1156
1157 if (!tp_rfk)
1158 return -ENODEV;
1159
1160 status = (tp_rfk->ops->get_status)();
1161 if (status < 0)
1162 return status;
1163
1164 rfkill_set_sw_state(tp_rfk->rfkill,
1165 (status == TPACPI_RFK_RADIO_OFF));
1166
1167 return status;
1168 }
1169
1170 /* Query FW and update rfkill sw state for all rfkill switches */
1171 static void tpacpi_rfk_update_swstate_all(void)
1172 {
1173 unsigned int i;
1174
1175 for (i = 0; i < TPACPI_RFK_SW_MAX; i++)
1176 tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[i]);
1177 }
1178
1179 /*
1180 * Sync the HW-blocking state of all rfkill switches,
1181 * do notice it causes the rfkill core to schedule uevents
1182 */
1183 static void tpacpi_rfk_update_hwblock_state(bool blocked)
1184 {
1185 unsigned int i;
1186 struct tpacpi_rfk *tp_rfk;
1187
1188 for (i = 0; i < TPACPI_RFK_SW_MAX; i++) {
1189 tp_rfk = tpacpi_rfkill_switches[i];
1190 if (tp_rfk) {
1191 if (rfkill_set_hw_state(tp_rfk->rfkill,
1192 blocked)) {
1193 /* ignore -- we track sw block */
1194 }
1195 }
1196 }
1197 }
1198
1199 /* Call to get the WLSW state from the firmware */
1200 static int hotkey_get_wlsw(void);
1201
1202 /* Call to query WLSW state and update all rfkill switches */
1203 static bool tpacpi_rfk_check_hwblock_state(void)
1204 {
1205 int res = hotkey_get_wlsw();
1206 int hw_blocked;
1207
1208 /* When unknown or unsupported, we have to assume it is unblocked */
1209 if (res < 0)
1210 return false;
1211
1212 hw_blocked = (res == TPACPI_RFK_RADIO_OFF);
1213 tpacpi_rfk_update_hwblock_state(hw_blocked);
1214
1215 return hw_blocked;
1216 }
1217
1218 static int tpacpi_rfk_hook_set_block(void *data, bool blocked)
1219 {
1220 struct tpacpi_rfk *tp_rfk = data;
1221 int res;
1222
1223 dbg_printk(TPACPI_DBG_RFKILL,
1224 "request to change radio state to %s\n",
1225 blocked ? "blocked" : "unblocked");
1226
1227 /* try to set radio state */
1228 res = (tp_rfk->ops->set_status)(blocked ?
1229 TPACPI_RFK_RADIO_OFF : TPACPI_RFK_RADIO_ON);
1230
1231 /* and update the rfkill core with whatever the FW really did */
1232 tpacpi_rfk_update_swstate(tp_rfk);
1233
1234 return (res < 0) ? res : 0;
1235 }
1236
1237 static const struct rfkill_ops tpacpi_rfk_rfkill_ops = {
1238 .set_block = tpacpi_rfk_hook_set_block,
1239 };
1240
1241 static int __init tpacpi_new_rfkill(const enum tpacpi_rfk_id id,
1242 const struct tpacpi_rfk_ops *tp_rfkops,
1243 const enum rfkill_type rfktype,
1244 const char *name,
1245 const bool set_default)
1246 {
1247 struct tpacpi_rfk *atp_rfk;
1248 int res;
1249 bool sw_state = false;
1250 bool hw_state;
1251 int sw_status;
1252
1253 BUG_ON(id >= TPACPI_RFK_SW_MAX || tpacpi_rfkill_switches[id]);
1254
1255 atp_rfk = kzalloc(sizeof(struct tpacpi_rfk), GFP_KERNEL);
1256 if (atp_rfk)
1257 atp_rfk->rfkill = rfkill_alloc(name,
1258 &tpacpi_pdev->dev,
1259 rfktype,
1260 &tpacpi_rfk_rfkill_ops,
1261 atp_rfk);
1262 if (!atp_rfk || !atp_rfk->rfkill) {
1263 pr_err("failed to allocate memory for rfkill class\n");
1264 kfree(atp_rfk);
1265 return -ENOMEM;
1266 }
1267
1268 atp_rfk->id = id;
1269 atp_rfk->ops = tp_rfkops;
1270
1271 sw_status = (tp_rfkops->get_status)();
1272 if (sw_status < 0) {
1273 pr_err("failed to read initial state for %s, error %d\n",
1274 name, sw_status);
1275 } else {
1276 sw_state = (sw_status == TPACPI_RFK_RADIO_OFF);
1277 if (set_default) {
1278 /* try to keep the initial state, since we ask the
1279 * firmware to preserve it across S5 in NVRAM */
1280 rfkill_init_sw_state(atp_rfk->rfkill, sw_state);
1281 }
1282 }
1283 hw_state = tpacpi_rfk_check_hwblock_state();
1284 rfkill_set_hw_state(atp_rfk->rfkill, hw_state);
1285
1286 res = rfkill_register(atp_rfk->rfkill);
1287 if (res < 0) {
1288 pr_err("failed to register %s rfkill switch: %d\n", name, res);
1289 rfkill_destroy(atp_rfk->rfkill);
1290 kfree(atp_rfk);
1291 return res;
1292 }
1293
1294 tpacpi_rfkill_switches[id] = atp_rfk;
1295
1296 pr_info("rfkill switch %s: radio is %sblocked\n",
1297 name, (sw_state || hw_state) ? "" : "un");
1298 return 0;
1299 }
1300
1301 static void tpacpi_destroy_rfkill(const enum tpacpi_rfk_id id)
1302 {
1303 struct tpacpi_rfk *tp_rfk;
1304
1305 BUG_ON(id >= TPACPI_RFK_SW_MAX);
1306
1307 tp_rfk = tpacpi_rfkill_switches[id];
1308 if (tp_rfk) {
1309 rfkill_unregister(tp_rfk->rfkill);
1310 rfkill_destroy(tp_rfk->rfkill);
1311 tpacpi_rfkill_switches[id] = NULL;
1312 kfree(tp_rfk);
1313 }
1314 }
1315
1316 static void printk_deprecated_rfkill_attribute(const char * const what)
1317 {
1318 printk_deprecated_attribute(what,
1319 "Please switch to generic rfkill before year 2010");
1320 }
1321
1322 /* sysfs <radio> enable ------------------------------------------------ */
1323 static ssize_t tpacpi_rfk_sysfs_enable_show(const enum tpacpi_rfk_id id,
1324 struct device_attribute *attr,
1325 char *buf)
1326 {
1327 int status;
1328
1329 printk_deprecated_rfkill_attribute(attr->attr.name);
1330
1331 /* This is in the ABI... */
1332 if (tpacpi_rfk_check_hwblock_state()) {
1333 status = TPACPI_RFK_RADIO_OFF;
1334 } else {
1335 status = tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]);
1336 if (status < 0)
1337 return status;
1338 }
1339
1340 return snprintf(buf, PAGE_SIZE, "%d\n",
1341 (status == TPACPI_RFK_RADIO_ON) ? 1 : 0);
1342 }
1343
1344 static ssize_t tpacpi_rfk_sysfs_enable_store(const enum tpacpi_rfk_id id,
1345 struct device_attribute *attr,
1346 const char *buf, size_t count)
1347 {
1348 unsigned long t;
1349 int res;
1350
1351 printk_deprecated_rfkill_attribute(attr->attr.name);
1352
1353 if (parse_strtoul(buf, 1, &t))
1354 return -EINVAL;
1355
1356 tpacpi_disclose_usertask(attr->attr.name, "set to %ld\n", t);
1357
1358 /* This is in the ABI... */
1359 if (tpacpi_rfk_check_hwblock_state() && !!t)
1360 return -EPERM;
1361
1362 res = tpacpi_rfkill_switches[id]->ops->set_status((!!t) ?
1363 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF);
1364 tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]);
1365
1366 return (res < 0) ? res : count;
1367 }
1368
1369 /* procfs -------------------------------------------------------------- */
1370 static int tpacpi_rfk_procfs_read(const enum tpacpi_rfk_id id, struct seq_file *m)
1371 {
1372 if (id >= TPACPI_RFK_SW_MAX)
1373 seq_printf(m, "status:\t\tnot supported\n");
1374 else {
1375 int status;
1376
1377 /* This is in the ABI... */
1378 if (tpacpi_rfk_check_hwblock_state()) {
1379 status = TPACPI_RFK_RADIO_OFF;
1380 } else {
1381 status = tpacpi_rfk_update_swstate(
1382 tpacpi_rfkill_switches[id]);
1383 if (status < 0)
1384 return status;
1385 }
1386
1387 seq_printf(m, "status:\t\t%s\n",
1388 (status == TPACPI_RFK_RADIO_ON) ?
1389 "enabled" : "disabled");
1390 seq_printf(m, "commands:\tenable, disable\n");
1391 }
1392
1393 return 0;
1394 }
1395
1396 static int tpacpi_rfk_procfs_write(const enum tpacpi_rfk_id id, char *buf)
1397 {
1398 char *cmd;
1399 int status = -1;
1400 int res = 0;
1401
1402 if (id >= TPACPI_RFK_SW_MAX)
1403 return -ENODEV;
1404
1405 while ((cmd = next_cmd(&buf))) {
1406 if (strlencmp(cmd, "enable") == 0)
1407 status = TPACPI_RFK_RADIO_ON;
1408 else if (strlencmp(cmd, "disable") == 0)
1409 status = TPACPI_RFK_RADIO_OFF;
1410 else
1411 return -EINVAL;
1412 }
1413
1414 if (status != -1) {
1415 tpacpi_disclose_usertask("procfs", "attempt to %s %s\n",
1416 (status == TPACPI_RFK_RADIO_ON) ?
1417 "enable" : "disable",
1418 tpacpi_rfkill_names[id]);
1419 res = (tpacpi_rfkill_switches[id]->ops->set_status)(status);
1420 tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]);
1421 }
1422
1423 return res;
1424 }
1425
1426 /*************************************************************************
1427 * thinkpad-acpi driver attributes
1428 */
1429
1430 /* interface_version --------------------------------------------------- */
1431 static ssize_t tpacpi_driver_interface_version_show(
1432 struct device_driver *drv,
1433 char *buf)
1434 {
1435 return snprintf(buf, PAGE_SIZE, "0x%08x\n", TPACPI_SYSFS_VERSION);
1436 }
1437
1438 static DRIVER_ATTR(interface_version, S_IRUGO,
1439 tpacpi_driver_interface_version_show, NULL);
1440
1441 /* debug_level --------------------------------------------------------- */
1442 static ssize_t tpacpi_driver_debug_show(struct device_driver *drv,
1443 char *buf)
1444 {
1445 return snprintf(buf, PAGE_SIZE, "0x%04x\n", dbg_level);
1446 }
1447
1448 static ssize_t tpacpi_driver_debug_store(struct device_driver *drv,
1449 const char *buf, size_t count)
1450 {
1451 unsigned long t;
1452
1453 if (parse_strtoul(buf, 0xffff, &t))
1454 return -EINVAL;
1455
1456 dbg_level = t;
1457
1458 return count;
1459 }
1460
1461 static DRIVER_ATTR(debug_level, S_IWUSR | S_IRUGO,
1462 tpacpi_driver_debug_show, tpacpi_driver_debug_store);
1463
1464 /* version ------------------------------------------------------------- */
1465 static ssize_t tpacpi_driver_version_show(struct device_driver *drv,
1466 char *buf)
1467 {
1468 return snprintf(buf, PAGE_SIZE, "%s v%s\n",
1469 TPACPI_DESC, TPACPI_VERSION);
1470 }
1471
1472 static DRIVER_ATTR(version, S_IRUGO,
1473 tpacpi_driver_version_show, NULL);
1474
1475 /* --------------------------------------------------------------------- */
1476
1477 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
1478
1479 /* wlsw_emulstate ------------------------------------------------------ */
1480 static ssize_t tpacpi_driver_wlsw_emulstate_show(struct device_driver *drv,
1481 char *buf)
1482 {
1483 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_wlsw_emulstate);
1484 }
1485
1486 static ssize_t tpacpi_driver_wlsw_emulstate_store(struct device_driver *drv,
1487 const char *buf, size_t count)
1488 {
1489 unsigned long t;
1490
1491 if (parse_strtoul(buf, 1, &t))
1492 return -EINVAL;
1493
1494 if (tpacpi_wlsw_emulstate != !!t) {
1495 tpacpi_wlsw_emulstate = !!t;
1496 tpacpi_rfk_update_hwblock_state(!t); /* negative logic */
1497 }
1498
1499 return count;
1500 }
1501
1502 static DRIVER_ATTR(wlsw_emulstate, S_IWUSR | S_IRUGO,
1503 tpacpi_driver_wlsw_emulstate_show,
1504 tpacpi_driver_wlsw_emulstate_store);
1505
1506 /* bluetooth_emulstate ------------------------------------------------- */
1507 static ssize_t tpacpi_driver_bluetooth_emulstate_show(
1508 struct device_driver *drv,
1509 char *buf)
1510 {
1511 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_bluetooth_emulstate);
1512 }
1513
1514 static ssize_t tpacpi_driver_bluetooth_emulstate_store(
1515 struct device_driver *drv,
1516 const char *buf, size_t count)
1517 {
1518 unsigned long t;
1519
1520 if (parse_strtoul(buf, 1, &t))
1521 return -EINVAL;
1522
1523 tpacpi_bluetooth_emulstate = !!t;
1524
1525 return count;
1526 }
1527
1528 static DRIVER_ATTR(bluetooth_emulstate, S_IWUSR | S_IRUGO,
1529 tpacpi_driver_bluetooth_emulstate_show,
1530 tpacpi_driver_bluetooth_emulstate_store);
1531
1532 /* wwan_emulstate ------------------------------------------------- */
1533 static ssize_t tpacpi_driver_wwan_emulstate_show(
1534 struct device_driver *drv,
1535 char *buf)
1536 {
1537 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_wwan_emulstate);
1538 }
1539
1540 static ssize_t tpacpi_driver_wwan_emulstate_store(
1541 struct device_driver *drv,
1542 const char *buf, size_t count)
1543 {
1544 unsigned long t;
1545
1546 if (parse_strtoul(buf, 1, &t))
1547 return -EINVAL;
1548
1549 tpacpi_wwan_emulstate = !!t;
1550
1551 return count;
1552 }
1553
1554 static DRIVER_ATTR(wwan_emulstate, S_IWUSR | S_IRUGO,
1555 tpacpi_driver_wwan_emulstate_show,
1556 tpacpi_driver_wwan_emulstate_store);
1557
1558 /* uwb_emulstate ------------------------------------------------- */
1559 static ssize_t tpacpi_driver_uwb_emulstate_show(
1560 struct device_driver *drv,
1561 char *buf)
1562 {
1563 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_uwb_emulstate);
1564 }
1565
1566 static ssize_t tpacpi_driver_uwb_emulstate_store(
1567 struct device_driver *drv,
1568 const char *buf, size_t count)
1569 {
1570 unsigned long t;
1571
1572 if (parse_strtoul(buf, 1, &t))
1573 return -EINVAL;
1574
1575 tpacpi_uwb_emulstate = !!t;
1576
1577 return count;
1578 }
1579
1580 static DRIVER_ATTR(uwb_emulstate, S_IWUSR | S_IRUGO,
1581 tpacpi_driver_uwb_emulstate_show,
1582 tpacpi_driver_uwb_emulstate_store);
1583 #endif
1584
1585 /* --------------------------------------------------------------------- */
1586
1587 static struct driver_attribute *tpacpi_driver_attributes[] = {
1588 &driver_attr_debug_level, &driver_attr_version,
1589 &driver_attr_interface_version,
1590 };
1591
1592 static int __init tpacpi_create_driver_attributes(struct device_driver *drv)
1593 {
1594 int i, res;
1595
1596 i = 0;
1597 res = 0;
1598 while (!res && i < ARRAY_SIZE(tpacpi_driver_attributes)) {
1599 res = driver_create_file(drv, tpacpi_driver_attributes[i]);
1600 i++;
1601 }
1602
1603 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
1604 if (!res && dbg_wlswemul)
1605 res = driver_create_file(drv, &driver_attr_wlsw_emulstate);
1606 if (!res && dbg_bluetoothemul)
1607 res = driver_create_file(drv, &driver_attr_bluetooth_emulstate);
1608 if (!res && dbg_wwanemul)
1609 res = driver_create_file(drv, &driver_attr_wwan_emulstate);
1610 if (!res && dbg_uwbemul)
1611 res = driver_create_file(drv, &driver_attr_uwb_emulstate);
1612 #endif
1613
1614 return res;
1615 }
1616
1617 static void tpacpi_remove_driver_attributes(struct device_driver *drv)
1618 {
1619 int i;
1620
1621 for (i = 0; i < ARRAY_SIZE(tpacpi_driver_attributes); i++)
1622 driver_remove_file(drv, tpacpi_driver_attributes[i]);
1623
1624 #ifdef THINKPAD_ACPI_DEBUGFACILITIES
1625 driver_remove_file(drv, &driver_attr_wlsw_emulstate);
1626 driver_remove_file(drv, &driver_attr_bluetooth_emulstate);
1627 driver_remove_file(drv, &driver_attr_wwan_emulstate);
1628 driver_remove_file(drv, &driver_attr_uwb_emulstate);
1629 #endif
1630 }
1631
1632 /*************************************************************************
1633 * Firmware Data
1634 */
1635
1636 /*
1637 * Table of recommended minimum BIOS versions
1638 *
1639 * Reasons for listing:
1640 * 1. Stable BIOS, listed because the unknown amount of
1641 * bugs and bad ACPI behaviour on older versions
1642 *
1643 * 2. BIOS or EC fw with known bugs that trigger on Linux
1644 *
1645 * 3. BIOS with known reduced functionality in older versions
1646 *
1647 * We recommend the latest BIOS and EC version.
1648 * We only support the latest BIOS and EC fw version as a rule.
1649 *
1650 * Sources: IBM ThinkPad Public Web Documents (update changelogs),
1651 * Information from users in ThinkWiki
1652 *
1653 * WARNING: we use this table also to detect that the machine is
1654 * a ThinkPad in some cases, so don't remove entries lightly.
1655 */
1656
1657 #define TPV_Q(__v, __id1, __id2, __bv1, __bv2) \
1658 { .vendor = (__v), \
1659 .bios = TPID(__id1, __id2), \
1660 .ec = TPACPI_MATCH_ANY, \
1661 .quirks = TPACPI_MATCH_ANY << 16 \
1662 | (__bv1) << 8 | (__bv2) }
1663
1664 #define TPV_Q_X(__v, __bid1, __bid2, __bv1, __bv2, \
1665 __eid, __ev1, __ev2) \
1666 { .vendor = (__v), \
1667 .bios = TPID(__bid1, __bid2), \
1668 .ec = __eid, \
1669 .quirks = (__ev1) << 24 | (__ev2) << 16 \
1670 | (__bv1) << 8 | (__bv2) }
1671
1672 #define TPV_QI0(__id1, __id2, __bv1, __bv2) \
1673 TPV_Q(PCI_VENDOR_ID_IBM, __id1, __id2, __bv1, __bv2)
1674
1675 /* Outdated IBM BIOSes often lack the EC id string */
1676 #define TPV_QI1(__id1, __id2, __bv1, __bv2, __ev1, __ev2) \
1677 TPV_Q_X(PCI_VENDOR_ID_IBM, __id1, __id2, \
1678 __bv1, __bv2, TPID(__id1, __id2), \
1679 __ev1, __ev2), \
1680 TPV_Q_X(PCI_VENDOR_ID_IBM, __id1, __id2, \
1681 __bv1, __bv2, TPACPI_MATCH_UNKNOWN, \
1682 __ev1, __ev2)
1683
1684 /* Outdated IBM BIOSes often lack the EC id string */
1685 #define TPV_QI2(__bid1, __bid2, __bv1, __bv2, \
1686 __eid1, __eid2, __ev1, __ev2) \
1687 TPV_Q_X(PCI_VENDOR_ID_IBM, __bid1, __bid2, \
1688 __bv1, __bv2, TPID(__eid1, __eid2), \
1689 __ev1, __ev2), \
1690 TPV_Q_X(PCI_VENDOR_ID_IBM, __bid1, __bid2, \
1691 __bv1, __bv2, TPACPI_MATCH_UNKNOWN, \
1692 __ev1, __ev2)
1693
1694 #define TPV_QL0(__id1, __id2, __bv1, __bv2) \
1695 TPV_Q(PCI_VENDOR_ID_LENOVO, __id1, __id2, __bv1, __bv2)
1696
1697 #define TPV_QL1(__id1, __id2, __bv1, __bv2, __ev1, __ev2) \
1698 TPV_Q_X(PCI_VENDOR_ID_LENOVO, __id1, __id2, \
1699 __bv1, __bv2, TPID(__id1, __id2), \
1700 __ev1, __ev2)
1701
1702 #define TPV_QL2(__bid1, __bid2, __bv1, __bv2, \
1703 __eid1, __eid2, __ev1, __ev2) \
1704 TPV_Q_X(PCI_VENDOR_ID_LENOVO, __bid1, __bid2, \
1705 __bv1, __bv2, TPID(__eid1, __eid2), \
1706 __ev1, __ev2)
1707
1708 static const struct tpacpi_quirk tpacpi_bios_version_qtable[] __initconst = {
1709 /* Numeric models ------------------ */
1710 /* FW MODEL BIOS VERS */
1711 TPV_QI0('I', 'M', '6', '5'), /* 570 */
1712 TPV_QI0('I', 'U', '2', '6'), /* 570E */
1713 TPV_QI0('I', 'B', '5', '4'), /* 600 */
1714 TPV_QI0('I', 'H', '4', '7'), /* 600E */
1715 TPV_QI0('I', 'N', '3', '6'), /* 600E */
1716 TPV_QI0('I', 'T', '5', '5'), /* 600X */
1717 TPV_QI0('I', 'D', '4', '8'), /* 770, 770E, 770ED */
1718 TPV_QI0('I', 'I', '4', '2'), /* 770X */
1719 TPV_QI0('I', 'O', '2', '3'), /* 770Z */
1720
1721 /* A-series ------------------------- */
1722 /* FW MODEL BIOS VERS EC VERS */
1723 TPV_QI0('I', 'W', '5', '9'), /* A20m */
1724 TPV_QI0('I', 'V', '6', '9'), /* A20p */
1725 TPV_QI0('1', '0', '2', '6'), /* A21e, A22e */
1726 TPV_QI0('K', 'U', '3', '6'), /* A21e */
1727 TPV_QI0('K', 'X', '3', '6'), /* A21m, A22m */
1728 TPV_QI0('K', 'Y', '3', '8'), /* A21p, A22p */
1729 TPV_QI0('1', 'B', '1', '7'), /* A22e */
1730 TPV_QI0('1', '3', '2', '0'), /* A22m */
1731 TPV_QI0('1', 'E', '7', '3'), /* A30/p (0) */
1732 TPV_QI1('1', 'G', '4', '1', '1', '7'), /* A31/p (0) */
1733 TPV_QI1('1', 'N', '1', '6', '0', '7'), /* A31/p (0) */
1734
1735 /* G-series ------------------------- */
1736 /* FW MODEL BIOS VERS */
1737 TPV_QI0('1', 'T', 'A', '6'), /* G40 */
1738 TPV_QI0('1', 'X', '5', '7'), /* G41 */
1739
1740 /* R-series, T-series --------------- */
1741 /* FW MODEL BIOS VERS EC VERS */
1742 TPV_QI0('1', 'C', 'F', '0'), /* R30 */
1743 TPV_QI0('1', 'F', 'F', '1'), /* R31 */
1744 TPV_QI0('1', 'M', '9', '7'), /* R32 */
1745 TPV_QI0('1', 'O', '6', '1'), /* R40 */
1746 TPV_QI0('1', 'P', '6', '5'), /* R40 */
1747 TPV_QI0('1', 'S', '7', '0'), /* R40e */
1748 TPV_QI1('1', 'R', 'D', 'R', '7', '1'), /* R50/p, R51,
1749 T40/p, T41/p, T42/p (1) */
1750 TPV_QI1('1', 'V', '7', '1', '2', '8'), /* R50e, R51 (1) */
1751 TPV_QI1('7', '8', '7', '1', '0', '6'), /* R51e (1) */
1752 TPV_QI1('7', '6', '6', '9', '1', '6'), /* R52 (1) */
1753 TPV_QI1('7', '0', '6', '9', '2', '8'), /* R52, T43 (1) */
1754
1755 TPV_QI0('I', 'Y', '6', '1'), /* T20 */
1756 TPV_QI0('K', 'Z', '3', '4'), /* T21 */
1757 TPV_QI0('1', '6', '3', '2'), /* T22 */
1758 TPV_QI1('1', 'A', '6', '4', '2', '3'), /* T23 (0) */
1759 TPV_QI1('1', 'I', '7', '1', '2', '0'), /* T30 (0) */
1760 TPV_QI1('1', 'Y', '6', '5', '2', '9'), /* T43/p (1) */
1761
1762 TPV_QL1('7', '9', 'E', '3', '5', '0'), /* T60/p */
1763 TPV_QL1('7', 'C', 'D', '2', '2', '2'), /* R60, R60i */
1764 TPV_QL1('7', 'E', 'D', '0', '1', '5'), /* R60e, R60i */
1765
1766 /* BIOS FW BIOS VERS EC FW EC VERS */
1767 TPV_QI2('1', 'W', '9', '0', '1', 'V', '2', '8'), /* R50e (1) */
1768 TPV_QL2('7', 'I', '3', '4', '7', '9', '5', '0'), /* T60/p wide */
1769
1770 /* X-series ------------------------- */
1771 /* FW MODEL BIOS VERS EC VERS */
1772 TPV_QI0('I', 'Z', '9', 'D'), /* X20, X21 */
1773 TPV_QI0('1', 'D', '7', '0'), /* X22, X23, X24 */
1774 TPV_QI1('1', 'K', '4', '8', '1', '8'), /* X30 (0) */
1775 TPV_QI1('1', 'Q', '9', '7', '2', '3'), /* X31, X32 (0) */
1776 TPV_QI1('1', 'U', 'D', '3', 'B', '2'), /* X40 (0) */
1777 TPV_QI1('7', '4', '6', '4', '2', '7'), /* X41 (0) */
1778 TPV_QI1('7', '5', '6', '0', '2', '0'), /* X41t (0) */
1779
1780 TPV_QL1('7', 'B', 'D', '7', '4', '0'), /* X60/s */
1781 TPV_QL1('7', 'J', '3', '0', '1', '3'), /* X60t */
1782
1783 /* (0) - older versions lack DMI EC fw string and functionality */
1784 /* (1) - older versions known to lack functionality */
1785 };
1786
1787 #undef TPV_QL1
1788 #undef TPV_QL0
1789 #undef TPV_QI2
1790 #undef TPV_QI1
1791 #undef TPV_QI0
1792 #undef TPV_Q_X
1793 #undef TPV_Q
1794
1795 static void __init tpacpi_check_outdated_fw(void)
1796 {
1797 unsigned long fwvers;
1798 u16 ec_version, bios_version;
1799
1800 fwvers = tpacpi_check_quirks(tpacpi_bios_version_qtable,
1801 ARRAY_SIZE(tpacpi_bios_version_qtable));
1802
1803 if (!fwvers)
1804 return;
1805
1806 bios_version = fwvers & 0xffffU;
1807 ec_version = (fwvers >> 16) & 0xffffU;
1808
1809 /* note that unknown versions are set to 0x0000 and we use that */
1810 if ((bios_version > thinkpad_id.bios_release) ||
1811 (ec_version > thinkpad_id.ec_release &&
1812 ec_version != TPACPI_MATCH_ANY)) {
1813 /*
1814 * The changelogs would let us track down the exact
1815 * reason, but it is just too much of a pain to track
1816 * it. We only list BIOSes that are either really
1817 * broken, or really stable to begin with, so it is
1818 * best if the user upgrades the firmware anyway.
1819 */
1820 pr_warn("WARNING: Outdated ThinkPad BIOS/EC firmware\n");
1821 pr_warn("WARNING: This firmware may be missing critical bug "
1822 "fixes and/or important features\n");
1823 }
1824 }
1825
1826 static bool __init tpacpi_is_fw_known(void)
1827 {
1828 return tpacpi_check_quirks(tpacpi_bios_version_qtable,
1829 ARRAY_SIZE(tpacpi_bios_version_qtable)) != 0;
1830 }
1831
1832 /****************************************************************************
1833 ****************************************************************************
1834 *
1835 * Subdrivers
1836 *
1837 ****************************************************************************
1838 ****************************************************************************/
1839
1840 /*************************************************************************
1841 * thinkpad-acpi metadata subdriver
1842 */
1843
1844 static int thinkpad_acpi_driver_read(struct seq_file *m)
1845 {
1846 seq_printf(m, "driver:\t\t%s\n", TPACPI_DESC);
1847 seq_printf(m, "version:\t%s\n", TPACPI_VERSION);
1848 return 0;
1849 }
1850
1851 static struct ibm_struct thinkpad_acpi_driver_data = {
1852 .name = "driver",
1853 .read = thinkpad_acpi_driver_read,
1854 };
1855
1856 /*************************************************************************
1857 * Hotkey subdriver
1858 */
1859
1860 /*
1861 * ThinkPad firmware event model
1862 *
1863 * The ThinkPad firmware has two main event interfaces: normal ACPI
1864 * notifications (which follow the ACPI standard), and a private event
1865 * interface.
1866 *
1867 * The private event interface also issues events for the hotkeys. As
1868 * the driver gained features, the event handling code ended up being
1869 * built around the hotkey subdriver. This will need to be refactored
1870 * to a more formal event API eventually.
1871 *
1872 * Some "hotkeys" are actually supposed to be used as event reports,
1873 * such as "brightness has changed", "volume has changed", depending on
1874 * the ThinkPad model and how the firmware is operating.
1875 *
1876 * Unlike other classes, hotkey-class events have mask/unmask control on
1877 * non-ancient firmware. However, how it behaves changes a lot with the
1878 * firmware model and version.
1879 */
1880
1881 enum { /* hot key scan codes (derived from ACPI DSDT) */
1882 TP_ACPI_HOTKEYSCAN_FNF1 = 0,
1883 TP_ACPI_HOTKEYSCAN_FNF2,
1884 TP_ACPI_HOTKEYSCAN_FNF3,
1885 TP_ACPI_HOTKEYSCAN_FNF4,
1886 TP_ACPI_HOTKEYSCAN_FNF5,
1887 TP_ACPI_HOTKEYSCAN_FNF6,
1888 TP_ACPI_HOTKEYSCAN_FNF7,
1889 TP_ACPI_HOTKEYSCAN_FNF8,
1890 TP_ACPI_HOTKEYSCAN_FNF9,
1891 TP_ACPI_HOTKEYSCAN_FNF10,
1892 TP_ACPI_HOTKEYSCAN_FNF11,
1893 TP_ACPI_HOTKEYSCAN_FNF12,
1894 TP_ACPI_HOTKEYSCAN_FNBACKSPACE,
1895 TP_ACPI_HOTKEYSCAN_FNINSERT,
1896 TP_ACPI_HOTKEYSCAN_FNDELETE,
1897 TP_ACPI_HOTKEYSCAN_FNHOME,
1898 TP_ACPI_HOTKEYSCAN_FNEND,
1899 TP_ACPI_HOTKEYSCAN_FNPAGEUP,
1900 TP_ACPI_HOTKEYSCAN_FNPAGEDOWN,
1901 TP_ACPI_HOTKEYSCAN_FNSPACE,
1902 TP_ACPI_HOTKEYSCAN_VOLUMEUP,
1903 TP_ACPI_HOTKEYSCAN_VOLUMEDOWN,
1904 TP_ACPI_HOTKEYSCAN_MUTE,
1905 TP_ACPI_HOTKEYSCAN_THINKPAD,
1906 TP_ACPI_HOTKEYSCAN_UNK1,
1907 TP_ACPI_HOTKEYSCAN_UNK2,
1908 TP_ACPI_HOTKEYSCAN_UNK3,
1909 TP_ACPI_HOTKEYSCAN_UNK4,
1910 TP_ACPI_HOTKEYSCAN_UNK5,
1911 TP_ACPI_HOTKEYSCAN_UNK6,
1912 TP_ACPI_HOTKEYSCAN_UNK7,
1913 TP_ACPI_HOTKEYSCAN_UNK8,
1914
1915 /* Hotkey keymap size */
1916 TPACPI_HOTKEY_MAP_LEN
1917 };
1918
1919 enum { /* Keys/events available through NVRAM polling */
1920 TPACPI_HKEY_NVRAM_KNOWN_MASK = 0x00fb88c0U,
1921 TPACPI_HKEY_NVRAM_GOOD_MASK = 0x00fb8000U,
1922 };
1923
1924 enum { /* Positions of some of the keys in hotkey masks */
1925 TP_ACPI_HKEY_DISPSWTCH_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF7,
1926 TP_ACPI_HKEY_DISPXPAND_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF8,
1927 TP_ACPI_HKEY_HIBERNATE_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF12,
1928 TP_ACPI_HKEY_BRGHTUP_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNHOME,
1929 TP_ACPI_HKEY_BRGHTDWN_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNEND,
1930 TP_ACPI_HKEY_THNKLGHT_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNPAGEUP,
1931 TP_ACPI_HKEY_ZOOM_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNSPACE,
1932 TP_ACPI_HKEY_VOLUP_MASK = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEUP,
1933 TP_ACPI_HKEY_VOLDWN_MASK = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEDOWN,
1934 TP_ACPI_HKEY_MUTE_MASK = 1 << TP_ACPI_HOTKEYSCAN_MUTE,
1935 TP_ACPI_HKEY_THINKPAD_MASK = 1 << TP_ACPI_HOTKEYSCAN_THINKPAD,
1936 };
1937
1938 enum { /* NVRAM to ACPI HKEY group map */
1939 TP_NVRAM_HKEY_GROUP_HK2 = TP_ACPI_HKEY_THINKPAD_MASK |
1940 TP_ACPI_HKEY_ZOOM_MASK |
1941 TP_ACPI_HKEY_DISPSWTCH_MASK |
1942 TP_ACPI_HKEY_HIBERNATE_MASK,
1943 TP_NVRAM_HKEY_GROUP_BRIGHTNESS = TP_ACPI_HKEY_BRGHTUP_MASK |
1944 TP_ACPI_HKEY_BRGHTDWN_MASK,
1945 TP_NVRAM_HKEY_GROUP_VOLUME = TP_ACPI_HKEY_VOLUP_MASK |
1946 TP_ACPI_HKEY_VOLDWN_MASK |
1947 TP_ACPI_HKEY_MUTE_MASK,
1948 };
1949
1950 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1951 struct tp_nvram_state {
1952 u16 thinkpad_toggle:1;
1953 u16 zoom_toggle:1;
1954 u16 display_toggle:1;
1955 u16 thinklight_toggle:1;
1956 u16 hibernate_toggle:1;
1957 u16 displayexp_toggle:1;
1958 u16 display_state:1;
1959 u16 brightness_toggle:1;
1960 u16 volume_toggle:1;
1961 u16 mute:1;
1962
1963 u8 brightness_level;
1964 u8 volume_level;
1965 };
1966
1967 /* kthread for the hotkey poller */
1968 static struct task_struct *tpacpi_hotkey_task;
1969
1970 /*
1971 * Acquire mutex to write poller control variables as an
1972 * atomic block.
1973 *
1974 * Increment hotkey_config_change when changing them if you
1975 * want the kthread to forget old state.
1976 *
1977 * See HOTKEY_CONFIG_CRITICAL_START/HOTKEY_CONFIG_CRITICAL_END
1978 */
1979 static struct mutex hotkey_thread_data_mutex;
1980 static unsigned int hotkey_config_change;
1981
1982 /*
1983 * hotkey poller control variables
1984 *
1985 * Must be atomic or readers will also need to acquire mutex
1986 *
1987 * HOTKEY_CONFIG_CRITICAL_START/HOTKEY_CONFIG_CRITICAL_END
1988 * should be used only when the changes need to be taken as
1989 * a block, OR when one needs to force the kthread to forget
1990 * old state.
1991 */
1992 static u32 hotkey_source_mask; /* bit mask 0=ACPI,1=NVRAM */
1993 static unsigned int hotkey_poll_freq = 10; /* Hz */
1994
1995 #define HOTKEY_CONFIG_CRITICAL_START \
1996 do { \
1997 mutex_lock(&hotkey_thread_data_mutex); \
1998 hotkey_config_change++; \
1999 } while (0);
2000 #define HOTKEY_CONFIG_CRITICAL_END \
2001 mutex_unlock(&hotkey_thread_data_mutex);
2002
2003 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2004
2005 #define hotkey_source_mask 0U
2006 #define HOTKEY_CONFIG_CRITICAL_START
2007 #define HOTKEY_CONFIG_CRITICAL_END
2008
2009 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2010
2011 static struct mutex hotkey_mutex;
2012
2013 static enum { /* Reasons for waking up */
2014 TP_ACPI_WAKEUP_NONE = 0, /* None or unknown */
2015 TP_ACPI_WAKEUP_BAYEJ, /* Bay ejection request */
2016 TP_ACPI_WAKEUP_UNDOCK, /* Undock request */
2017 } hotkey_wakeup_reason;
2018
2019 static int hotkey_autosleep_ack;
2020
2021 static u32 hotkey_orig_mask; /* events the BIOS had enabled */
2022 static u32 hotkey_all_mask; /* all events supported in fw */
2023 static u32 hotkey_reserved_mask; /* events better left disabled */
2024 static u32 hotkey_driver_mask; /* events needed by the driver */
2025 static u32 hotkey_user_mask; /* events visible to userspace */
2026 static u32 hotkey_acpi_mask; /* events enabled in firmware */
2027
2028 static u16 *hotkey_keycode_map;
2029
2030 static struct attribute_set *hotkey_dev_attributes;
2031
2032 static void tpacpi_driver_event(const unsigned int hkey_event);
2033 static void hotkey_driver_event(const unsigned int scancode);
2034 static void hotkey_poll_setup(const bool may_warn);
2035
2036 /* HKEY.MHKG() return bits */
2037 #define TP_HOTKEY_TABLET_MASK (1 << 3)
2038
2039 static int hotkey_get_wlsw(void)
2040 {
2041 int status;
2042
2043 if (!tp_features.hotkey_wlsw)
2044 return -ENODEV;
2045
2046 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
2047 if (dbg_wlswemul)
2048 return (tpacpi_wlsw_emulstate) ?
2049 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
2050 #endif
2051
2052 if (!acpi_evalf(hkey_handle, &status, "WLSW", "d"))
2053 return -EIO;
2054
2055 return (status) ? TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
2056 }
2057
2058 static int hotkey_get_tablet_mode(int *status)
2059 {
2060 int s;
2061
2062 if (!acpi_evalf(hkey_handle, &s, "MHKG", "d"))
2063 return -EIO;
2064
2065 *status = ((s & TP_HOTKEY_TABLET_MASK) != 0);
2066 return 0;
2067 }
2068
2069 /*
2070 * Reads current event mask from firmware, and updates
2071 * hotkey_acpi_mask accordingly. Also resets any bits
2072 * from hotkey_user_mask that are unavailable to be
2073 * delivered (shadow requirement of the userspace ABI).
2074 *
2075 * Call with hotkey_mutex held
2076 */
2077 static int hotkey_mask_get(void)
2078 {
2079 if (tp_features.hotkey_mask) {
2080 u32 m = 0;
2081
2082 if (!acpi_evalf(hkey_handle, &m, "DHKN", "d"))
2083 return -EIO;
2084
2085 hotkey_acpi_mask = m;
2086 } else {
2087 /* no mask support doesn't mean no event support... */
2088 hotkey_acpi_mask = hotkey_all_mask;
2089 }
2090
2091 /* sync userspace-visible mask */
2092 hotkey_user_mask &= (hotkey_acpi_mask | hotkey_source_mask);
2093
2094 return 0;
2095 }
2096
2097 void static hotkey_mask_warn_incomplete_mask(void)
2098 {
2099 /* log only what the user can fix... */
2100 const u32 wantedmask = hotkey_driver_mask &
2101 ~(hotkey_acpi_mask | hotkey_source_mask) &
2102 (hotkey_all_mask | TPACPI_HKEY_NVRAM_KNOWN_MASK);
2103
2104 if (wantedmask)
2105 pr_notice("required events 0x%08x not enabled!\n", wantedmask);
2106 }
2107
2108 /*
2109 * Set the firmware mask when supported
2110 *
2111 * Also calls hotkey_mask_get to update hotkey_acpi_mask.
2112 *
2113 * NOTE: does not set bits in hotkey_user_mask, but may reset them.
2114 *
2115 * Call with hotkey_mutex held
2116 */
2117 static int hotkey_mask_set(u32 mask)
2118 {
2119 int i;
2120 int rc = 0;
2121
2122 const u32 fwmask = mask & ~hotkey_source_mask;
2123
2124 if (tp_features.hotkey_mask) {
2125 for (i = 0; i < 32; i++) {
2126 if (!acpi_evalf(hkey_handle,
2127 NULL, "MHKM", "vdd", i + 1,
2128 !!(mask & (1 << i)))) {
2129 rc = -EIO;
2130 break;
2131 }
2132 }
2133 }
2134
2135 /*
2136 * We *must* make an inconditional call to hotkey_mask_get to
2137 * refresh hotkey_acpi_mask and update hotkey_user_mask
2138 *
2139 * Take the opportunity to also log when we cannot _enable_
2140 * a given event.
2141 */
2142 if (!hotkey_mask_get() && !rc && (fwmask & ~hotkey_acpi_mask)) {
2143 pr_notice("asked for hotkey mask 0x%08x, but "
2144 "firmware forced it to 0x%08x\n",
2145 fwmask, hotkey_acpi_mask);
2146 }
2147
2148 if (tpacpi_lifecycle != TPACPI_LIFE_EXITING)
2149 hotkey_mask_warn_incomplete_mask();
2150
2151 return rc;
2152 }
2153
2154 /*
2155 * Sets hotkey_user_mask and tries to set the firmware mask
2156 *
2157 * Call with hotkey_mutex held
2158 */
2159 static int hotkey_user_mask_set(const u32 mask)
2160 {
2161 int rc;
2162
2163 /* Give people a chance to notice they are doing something that
2164 * is bound to go boom on their users sooner or later */
2165 if (!tp_warned.hotkey_mask_ff &&
2166 (mask == 0xffff || mask == 0xffffff ||
2167 mask == 0xffffffff)) {
2168 tp_warned.hotkey_mask_ff = 1;
2169 pr_notice("setting the hotkey mask to 0x%08x is likely "
2170 "not the best way to go about it\n", mask);
2171 pr_notice("please consider using the driver defaults, "
2172 "and refer to up-to-date thinkpad-acpi "
2173 "documentation\n");
2174 }
2175
2176 /* Try to enable what the user asked for, plus whatever we need.
2177 * this syncs everything but won't enable bits in hotkey_user_mask */
2178 rc = hotkey_mask_set((mask | hotkey_driver_mask) & ~hotkey_source_mask);
2179
2180 /* Enable the available bits in hotkey_user_mask */
2181 hotkey_user_mask = mask & (hotkey_acpi_mask | hotkey_source_mask);
2182
2183 return rc;
2184 }
2185
2186 /*
2187 * Sets the driver hotkey mask.
2188 *
2189 * Can be called even if the hotkey subdriver is inactive
2190 */
2191 static int tpacpi_hotkey_driver_mask_set(const u32 mask)
2192 {
2193 int rc;
2194
2195 /* Do the right thing if hotkey_init has not been called yet */
2196 if (!tp_features.hotkey) {
2197 hotkey_driver_mask = mask;
2198 return 0;
2199 }
2200
2201 mutex_lock(&hotkey_mutex);
2202
2203 HOTKEY_CONFIG_CRITICAL_START
2204 hotkey_driver_mask = mask;
2205 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2206 hotkey_source_mask |= (mask & ~hotkey_all_mask);
2207 #endif
2208 HOTKEY_CONFIG_CRITICAL_END
2209
2210 rc = hotkey_mask_set((hotkey_acpi_mask | hotkey_driver_mask) &
2211 ~hotkey_source_mask);
2212 hotkey_poll_setup(true);
2213
2214 mutex_unlock(&hotkey_mutex);
2215
2216 return rc;
2217 }
2218
2219 static int hotkey_status_get(int *status)
2220 {
2221 if (!acpi_evalf(hkey_handle, status, "DHKC", "d"))
2222 return -EIO;
2223
2224 return 0;
2225 }
2226
2227 static int hotkey_status_set(bool enable)
2228 {
2229 if (!acpi_evalf(hkey_handle, NULL, "MHKC", "vd", enable ? 1 : 0))
2230 return -EIO;
2231
2232 return 0;
2233 }
2234
2235 static void tpacpi_input_send_tabletsw(void)
2236 {
2237 int state;
2238
2239 if (tp_features.hotkey_tablet &&
2240 !hotkey_get_tablet_mode(&state)) {
2241 mutex_lock(&tpacpi_inputdev_send_mutex);
2242
2243 input_report_switch(tpacpi_inputdev,
2244 SW_TABLET_MODE, !!state);
2245 input_sync(tpacpi_inputdev);
2246
2247 mutex_unlock(&tpacpi_inputdev_send_mutex);
2248 }
2249 }
2250
2251 /* Do NOT call without validating scancode first */
2252 static void tpacpi_input_send_key(const unsigned int scancode)
2253 {
2254 const unsigned int keycode = hotkey_keycode_map[scancode];
2255
2256 if (keycode != KEY_RESERVED) {
2257 mutex_lock(&tpacpi_inputdev_send_mutex);
2258
2259 input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN, scancode);
2260 input_report_key(tpacpi_inputdev, keycode, 1);
2261 input_sync(tpacpi_inputdev);
2262
2263 input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN, scancode);
2264 input_report_key(tpacpi_inputdev, keycode, 0);
2265 input_sync(tpacpi_inputdev);
2266
2267 mutex_unlock(&tpacpi_inputdev_send_mutex);
2268 }
2269 }
2270
2271 /* Do NOT call without validating scancode first */
2272 static void tpacpi_input_send_key_masked(const unsigned int scancode)
2273 {
2274 hotkey_driver_event(scancode);
2275 if (hotkey_user_mask & (1 << scancode))
2276 tpacpi_input_send_key(scancode);
2277 }
2278
2279 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2280 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver;
2281
2282 /* Do NOT call without validating scancode first */
2283 static void tpacpi_hotkey_send_key(unsigned int scancode)
2284 {
2285 tpacpi_input_send_key_masked(scancode);
2286 }
2287
2288 static void hotkey_read_nvram(struct tp_nvram_state *n, const u32 m)
2289 {
2290 u8 d;
2291
2292 if (m & TP_NVRAM_HKEY_GROUP_HK2) {
2293 d = nvram_read_byte(TP_NVRAM_ADDR_HK2);
2294 n->thinkpad_toggle = !!(d & TP_NVRAM_MASK_HKT_THINKPAD);
2295 n->zoom_toggle = !!(d & TP_NVRAM_MASK_HKT_ZOOM);
2296 n->display_toggle = !!(d & TP_NVRAM_MASK_HKT_DISPLAY);
2297 n->hibernate_toggle = !!(d & TP_NVRAM_MASK_HKT_HIBERNATE);
2298 }
2299 if (m & TP_ACPI_HKEY_THNKLGHT_MASK) {
2300 d = nvram_read_byte(TP_NVRAM_ADDR_THINKLIGHT);
2301 n->thinklight_toggle = !!(d & TP_NVRAM_MASK_THINKLIGHT);
2302 }
2303 if (m & TP_ACPI_HKEY_DISPXPAND_MASK) {
2304 d = nvram_read_byte(TP_NVRAM_ADDR_VIDEO);
2305 n->displayexp_toggle =
2306 !!(d & TP_NVRAM_MASK_HKT_DISPEXPND);
2307 }
2308 if (m & TP_NVRAM_HKEY_GROUP_BRIGHTNESS) {
2309 d = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS);
2310 n->brightness_level = (d & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
2311 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
2312 n->brightness_toggle =
2313 !!(d & TP_NVRAM_MASK_HKT_BRIGHTNESS);
2314 }
2315 if (m & TP_NVRAM_HKEY_GROUP_VOLUME) {
2316 d = nvram_read_byte(TP_NVRAM_ADDR_MIXER);
2317 n->volume_level = (d & TP_NVRAM_MASK_LEVEL_VOLUME)
2318 >> TP_NVRAM_POS_LEVEL_VOLUME;
2319 n->mute = !!(d & TP_NVRAM_MASK_MUTE);
2320 n->volume_toggle = !!(d & TP_NVRAM_MASK_HKT_VOLUME);
2321 }
2322 }
2323
2324 static void hotkey_compare_and_issue_event(struct tp_nvram_state *oldn,
2325 struct tp_nvram_state *newn,
2326 const u32 event_mask)
2327 {
2328
2329 #define TPACPI_COMPARE_KEY(__scancode, __member) \
2330 do { \
2331 if ((event_mask & (1 << __scancode)) && \
2332 oldn->__member != newn->__member) \
2333 tpacpi_hotkey_send_key(__scancode); \
2334 } while (0)
2335
2336 #define TPACPI_MAY_SEND_KEY(__scancode) \
2337 do { \
2338 if (event_mask & (1 << __scancode)) \
2339 tpacpi_hotkey_send_key(__scancode); \
2340 } while (0)
2341
2342 void issue_volchange(const unsigned int oldvol,
2343 const unsigned int newvol)
2344 {
2345 unsigned int i = oldvol;
2346
2347 while (i > newvol) {
2348 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
2349 i--;
2350 }
2351 while (i < newvol) {
2352 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
2353 i++;
2354 }
2355 }
2356
2357 void issue_brightnesschange(const unsigned int oldbrt,
2358 const unsigned int newbrt)
2359 {
2360 unsigned int i = oldbrt;
2361
2362 while (i > newbrt) {
2363 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
2364 i--;
2365 }
2366 while (i < newbrt) {
2367 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
2368 i++;
2369 }
2370 }
2371
2372 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_THINKPAD, thinkpad_toggle);
2373 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNSPACE, zoom_toggle);
2374 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF7, display_toggle);
2375 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF12, hibernate_toggle);
2376
2377 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNPAGEUP, thinklight_toggle);
2378
2379 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF8, displayexp_toggle);
2380
2381 /*
2382 * Handle volume
2383 *
2384 * This code is supposed to duplicate the IBM firmware behaviour:
2385 * - Pressing MUTE issues mute hotkey message, even when already mute
2386 * - Pressing Volume up/down issues volume up/down hotkey messages,
2387 * even when already at maximum or minimum volume
2388 * - The act of unmuting issues volume up/down notification,
2389 * depending which key was used to unmute
2390 *
2391 * We are constrained to what the NVRAM can tell us, which is not much
2392 * and certainly not enough if more than one volume hotkey was pressed
2393 * since the last poll cycle.
2394 *
2395 * Just to make our life interesting, some newer Lenovo ThinkPads have
2396 * bugs in the BIOS and may fail to update volume_toggle properly.
2397 */
2398 if (newn->mute) {
2399 /* muted */
2400 if (!oldn->mute ||
2401 oldn->volume_toggle != newn->volume_toggle ||
2402 oldn->volume_level != newn->volume_level) {
2403 /* recently muted, or repeated mute keypress, or
2404 * multiple presses ending in mute */
2405 issue_volchange(oldn->volume_level, newn->volume_level);
2406 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE);
2407 }
2408 } else {
2409 /* unmute */
2410 if (oldn->mute) {
2411 /* recently unmuted, issue 'unmute' keypress */
2412 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
2413 }
2414 if (oldn->volume_level != newn->volume_level) {
2415 issue_volchange(oldn->volume_level, newn->volume_level);
2416 } else if (oldn->volume_toggle != newn->volume_toggle) {
2417 /* repeated vol up/down keypress at end of scale ? */
2418 if (newn->volume_level == 0)
2419 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
2420 else if (newn->volume_level >= TP_NVRAM_LEVEL_VOLUME_MAX)
2421 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
2422 }
2423 }
2424
2425 /* handle brightness */
2426 if (oldn->brightness_level != newn->brightness_level) {
2427 issue_brightnesschange(oldn->brightness_level,
2428 newn->brightness_level);
2429 } else if (oldn->brightness_toggle != newn->brightness_toggle) {
2430 /* repeated key presses that didn't change state */
2431 if (newn->brightness_level == 0)
2432 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
2433 else if (newn->brightness_level >= bright_maxlvl
2434 && !tp_features.bright_unkfw)
2435 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
2436 }
2437
2438 #undef TPACPI_COMPARE_KEY
2439 #undef TPACPI_MAY_SEND_KEY
2440 }
2441
2442 /*
2443 * Polling driver
2444 *
2445 * We track all events in hotkey_source_mask all the time, since
2446 * most of them are edge-based. We only issue those requested by
2447 * hotkey_user_mask or hotkey_driver_mask, though.
2448 */
2449 static int hotkey_kthread(void *data)
2450 {
2451 struct tp_nvram_state s[2];
2452 u32 poll_mask, event_mask;
2453 unsigned int si, so;
2454 unsigned long t;
2455 unsigned int change_detector;
2456 unsigned int poll_freq;
2457 bool was_frozen;
2458
2459 if (tpacpi_lifecycle == TPACPI_LIFE_EXITING)
2460 goto exit;
2461
2462 set_freezable();
2463
2464 so = 0;
2465 si = 1;
2466 t = 0;
2467
2468 /* Initial state for compares */
2469 mutex_lock(&hotkey_thread_data_mutex);
2470 change_detector = hotkey_config_change;
2471 poll_mask = hotkey_source_mask;
2472 event_mask = hotkey_source_mask &
2473 (hotkey_driver_mask | hotkey_user_mask);
2474 poll_freq = hotkey_poll_freq;
2475 mutex_unlock(&hotkey_thread_data_mutex);
2476 hotkey_read_nvram(&s[so], poll_mask);
2477
2478 while (!kthread_should_stop()) {
2479 if (t == 0) {
2480 if (likely(poll_freq))
2481 t = 1000/poll_freq;
2482 else
2483 t = 100; /* should never happen... */
2484 }
2485 t = msleep_interruptible(t);
2486 if (unlikely(kthread_freezable_should_stop(&was_frozen)))
2487 break;
2488
2489 if (t > 0 && !was_frozen)
2490 continue;
2491
2492 mutex_lock(&hotkey_thread_data_mutex);
2493 if (was_frozen || hotkey_config_change != change_detector) {
2494 /* forget old state on thaw or config change */
2495 si = so;
2496 t = 0;
2497 change_detector = hotkey_config_change;
2498 }
2499 poll_mask = hotkey_source_mask;
2500 event_mask = hotkey_source_mask &
2501 (hotkey_driver_mask | hotkey_user_mask);
2502 poll_freq = hotkey_poll_freq;
2503 mutex_unlock(&hotkey_thread_data_mutex);
2504
2505 if (likely(poll_mask)) {
2506 hotkey_read_nvram(&s[si], poll_mask);
2507 if (likely(si != so)) {
2508 hotkey_compare_and_issue_event(&s[so], &s[si],
2509 event_mask);
2510 }
2511 }
2512
2513 so = si;
2514 si ^= 1;
2515 }
2516
2517 exit:
2518 return 0;
2519 }
2520
2521 /* call with hotkey_mutex held */
2522 static void hotkey_poll_stop_sync(void)
2523 {
2524 if (tpacpi_hotkey_task) {
2525 kthread_stop(tpacpi_hotkey_task);
2526 tpacpi_hotkey_task = NULL;
2527 }
2528 }
2529
2530 /* call with hotkey_mutex held */
2531 static void hotkey_poll_setup(const bool may_warn)
2532 {
2533 const u32 poll_driver_mask = hotkey_driver_mask & hotkey_source_mask;
2534 const u32 poll_user_mask = hotkey_user_mask & hotkey_source_mask;
2535
2536 if (hotkey_poll_freq > 0 &&
2537 (poll_driver_mask ||
2538 (poll_user_mask && tpacpi_inputdev->users > 0))) {
2539 if (!tpacpi_hotkey_task) {
2540 tpacpi_hotkey_task = kthread_run(hotkey_kthread,
2541 NULL, TPACPI_NVRAM_KTHREAD_NAME);
2542 if (IS_ERR(tpacpi_hotkey_task)) {
2543 tpacpi_hotkey_task = NULL;
2544 pr_err("could not create kernel thread "
2545 "for hotkey polling\n");
2546 }
2547 }
2548 } else {
2549 hotkey_poll_stop_sync();
2550 if (may_warn && (poll_driver_mask || poll_user_mask) &&
2551 hotkey_poll_freq == 0) {
2552 pr_notice("hot keys 0x%08x and/or events 0x%08x "
2553 "require polling, which is currently "
2554 "disabled\n",
2555 poll_user_mask, poll_driver_mask);
2556 }
2557 }
2558 }
2559
2560 static void hotkey_poll_setup_safe(const bool may_warn)
2561 {
2562 mutex_lock(&hotkey_mutex);
2563 hotkey_poll_setup(may_warn);
2564 mutex_unlock(&hotkey_mutex);
2565 }
2566
2567 /* call with hotkey_mutex held */
2568 static void hotkey_poll_set_freq(unsigned int freq)
2569 {
2570 if (!freq)
2571 hotkey_poll_stop_sync();
2572
2573 hotkey_poll_freq = freq;
2574 }
2575
2576 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2577
2578 static void hotkey_poll_setup(const bool __unused)
2579 {
2580 }
2581
2582 static void hotkey_poll_setup_safe(const bool __unused)
2583 {
2584 }
2585
2586 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2587
2588 static int hotkey_inputdev_open(struct input_dev *dev)
2589 {
2590 switch (tpacpi_lifecycle) {
2591 case TPACPI_LIFE_INIT:
2592 case TPACPI_LIFE_RUNNING:
2593 hotkey_poll_setup_safe(false);
2594 return 0;
2595 case TPACPI_LIFE_EXITING:
2596 return -EBUSY;
2597 }
2598
2599 /* Should only happen if tpacpi_lifecycle is corrupt */
2600 BUG();
2601 return -EBUSY;
2602 }
2603
2604 static void hotkey_inputdev_close(struct input_dev *dev)
2605 {
2606 /* disable hotkey polling when possible */
2607 if (tpacpi_lifecycle != TPACPI_LIFE_EXITING &&
2608 !(hotkey_source_mask & hotkey_driver_mask))
2609 hotkey_poll_setup_safe(false);
2610 }
2611
2612 /* sysfs hotkey enable ------------------------------------------------- */
2613 static ssize_t hotkey_enable_show(struct device *dev,
2614 struct device_attribute *attr,
2615 char *buf)
2616 {
2617 int res, status;
2618
2619 printk_deprecated_attribute("hotkey_enable",
2620 "Hotkey reporting is always enabled");
2621
2622 res = hotkey_status_get(&status);
2623 if (res)
2624 return res;
2625
2626 return snprintf(buf, PAGE_SIZE, "%d\n", status);
2627 }
2628
2629 static ssize_t hotkey_enable_store(struct device *dev,
2630 struct device_attribute *attr,
2631 const char *buf, size_t count)
2632 {
2633 unsigned long t;
2634
2635 printk_deprecated_attribute("hotkey_enable",
2636 "Hotkeys can be disabled through hotkey_mask");
2637
2638 if (parse_strtoul(buf, 1, &t))
2639 return -EINVAL;
2640
2641 if (t == 0)
2642 return -EPERM;
2643
2644 return count;
2645 }
2646
2647 static struct device_attribute dev_attr_hotkey_enable =
2648 __ATTR(hotkey_enable, S_IWUSR | S_IRUGO,
2649 hotkey_enable_show, hotkey_enable_store);
2650
2651 /* sysfs hotkey mask --------------------------------------------------- */
2652 static ssize_t hotkey_mask_show(struct device *dev,
2653 struct device_attribute *attr,
2654 char *buf)
2655 {
2656 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_user_mask);
2657 }
2658
2659 static ssize_t hotkey_mask_store(struct device *dev,
2660 struct device_attribute *attr,
2661 const char *buf, size_t count)
2662 {
2663 unsigned long t;
2664 int res;
2665
2666 if (parse_strtoul(buf, 0xffffffffUL, &t))
2667 return -EINVAL;
2668
2669 if (mutex_lock_killable(&hotkey_mutex))
2670 return -ERESTARTSYS;
2671
2672 res = hotkey_user_mask_set(t);
2673
2674 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2675 hotkey_poll_setup(true);
2676 #endif
2677
2678 mutex_unlock(&hotkey_mutex);
2679
2680 tpacpi_disclose_usertask("hotkey_mask", "set to 0x%08lx\n", t);
2681
2682 return (res) ? res : count;
2683 }
2684
2685 static struct device_attribute dev_attr_hotkey_mask =
2686 __ATTR(hotkey_mask, S_IWUSR | S_IRUGO,
2687 hotkey_mask_show, hotkey_mask_store);
2688
2689 /* sysfs hotkey bios_enabled ------------------------------------------- */
2690 static ssize_t hotkey_bios_enabled_show(struct device *dev,
2691 struct device_attribute *attr,
2692 char *buf)
2693 {
2694 return sprintf(buf, "0\n");
2695 }
2696
2697 static struct device_attribute dev_attr_hotkey_bios_enabled =
2698 __ATTR(hotkey_bios_enabled, S_IRUGO, hotkey_bios_enabled_show, NULL);
2699
2700 /* sysfs hotkey bios_mask ---------------------------------------------- */
2701 static ssize_t hotkey_bios_mask_show(struct device *dev,
2702 struct device_attribute *attr,
2703 char *buf)
2704 {
2705 printk_deprecated_attribute("hotkey_bios_mask",
2706 "This attribute is useless.");
2707 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_orig_mask);
2708 }
2709
2710 static struct device_attribute dev_attr_hotkey_bios_mask =
2711 __ATTR(hotkey_bios_mask, S_IRUGO, hotkey_bios_mask_show, NULL);
2712
2713 /* sysfs hotkey all_mask ----------------------------------------------- */
2714 static ssize_t hotkey_all_mask_show(struct device *dev,
2715 struct device_attribute *attr,
2716 char *buf)
2717 {
2718 return snprintf(buf, PAGE_SIZE, "0x%08x\n",
2719 hotkey_all_mask | hotkey_source_mask);
2720 }
2721
2722 static struct device_attribute dev_attr_hotkey_all_mask =
2723 __ATTR(hotkey_all_mask, S_IRUGO, hotkey_all_mask_show, NULL);
2724
2725 /* sysfs hotkey recommended_mask --------------------------------------- */
2726 static ssize_t hotkey_recommended_mask_show(struct device *dev,
2727 struct device_attribute *attr,
2728 char *buf)
2729 {
2730 return snprintf(buf, PAGE_SIZE, "0x%08x\n",
2731 (hotkey_all_mask | hotkey_source_mask)
2732 & ~hotkey_reserved_mask);
2733 }
2734
2735 static struct device_attribute dev_attr_hotkey_recommended_mask =
2736 __ATTR(hotkey_recommended_mask, S_IRUGO,
2737 hotkey_recommended_mask_show, NULL);
2738
2739 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2740
2741 /* sysfs hotkey hotkey_source_mask ------------------------------------- */
2742 static ssize_t hotkey_source_mask_show(struct device *dev,
2743 struct device_attribute *attr,
2744 char *buf)
2745 {
2746 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_source_mask);
2747 }
2748
2749 static ssize_t hotkey_source_mask_store(struct device *dev,
2750 struct device_attribute *attr,
2751 const char *buf, size_t count)
2752 {
2753 unsigned long t;
2754 u32 r_ev;
2755 int rc;
2756
2757 if (parse_strtoul(buf, 0xffffffffUL, &t) ||
2758 ((t & ~TPACPI_HKEY_NVRAM_KNOWN_MASK) != 0))
2759 return -EINVAL;
2760
2761 if (mutex_lock_killable(&hotkey_mutex))
2762 return -ERESTARTSYS;
2763
2764 HOTKEY_CONFIG_CRITICAL_START
2765 hotkey_source_mask = t;
2766 HOTKEY_CONFIG_CRITICAL_END
2767
2768 rc = hotkey_mask_set((hotkey_user_mask | hotkey_driver_mask) &
2769 ~hotkey_source_mask);
2770 hotkey_poll_setup(true);
2771
2772 /* check if events needed by the driver got disabled */
2773 r_ev = hotkey_driver_mask & ~(hotkey_acpi_mask & hotkey_all_mask)
2774 & ~hotkey_source_mask & TPACPI_HKEY_NVRAM_KNOWN_MASK;
2775
2776 mutex_unlock(&hotkey_mutex);
2777
2778 if (rc < 0)
2779 pr_err("hotkey_source_mask: "
2780 "failed to update the firmware event mask!\n");
2781
2782 if (r_ev)
2783 pr_notice("hotkey_source_mask: "
2784 "some important events were disabled: 0x%04x\n",
2785 r_ev);
2786
2787 tpacpi_disclose_usertask("hotkey_source_mask", "set to 0x%08lx\n", t);
2788
2789 return (rc < 0) ? rc : count;
2790 }
2791
2792 static struct device_attribute dev_attr_hotkey_source_mask =
2793 __ATTR(hotkey_source_mask, S_IWUSR | S_IRUGO,
2794 hotkey_source_mask_show, hotkey_source_mask_store);
2795
2796 /* sysfs hotkey hotkey_poll_freq --------------------------------------- */
2797 static ssize_t hotkey_poll_freq_show(struct device *dev,
2798 struct device_attribute *attr,
2799 char *buf)
2800 {
2801 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_poll_freq);
2802 }
2803
2804 static ssize_t hotkey_poll_freq_store(struct device *dev,
2805 struct device_attribute *attr,
2806 const char *buf, size_t count)
2807 {
2808 unsigned long t;
2809
2810 if (parse_strtoul(buf, 25, &t))
2811 return -EINVAL;
2812
2813 if (mutex_lock_killable(&hotkey_mutex))
2814 return -ERESTARTSYS;
2815
2816 hotkey_poll_set_freq(t);
2817 hotkey_poll_setup(true);
2818
2819 mutex_unlock(&hotkey_mutex);
2820
2821 tpacpi_disclose_usertask("hotkey_poll_freq", "set to %lu\n", t);
2822
2823 return count;
2824 }
2825
2826 static struct device_attribute dev_attr_hotkey_poll_freq =
2827 __ATTR(hotkey_poll_freq, S_IWUSR | S_IRUGO,
2828 hotkey_poll_freq_show, hotkey_poll_freq_store);
2829
2830 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2831
2832 /* sysfs hotkey radio_sw (pollable) ------------------------------------ */
2833 static ssize_t hotkey_radio_sw_show(struct device *dev,
2834 struct device_attribute *attr,
2835 char *buf)
2836 {
2837 int res;
2838 res = hotkey_get_wlsw();
2839 if (res < 0)
2840 return res;
2841
2842 /* Opportunistic update */
2843 tpacpi_rfk_update_hwblock_state((res == TPACPI_RFK_RADIO_OFF));
2844
2845 return snprintf(buf, PAGE_SIZE, "%d\n",
2846 (res == TPACPI_RFK_RADIO_OFF) ? 0 : 1);
2847 }
2848
2849 static struct device_attribute dev_attr_hotkey_radio_sw =
2850 __ATTR(hotkey_radio_sw, S_IRUGO, hotkey_radio_sw_show, NULL);
2851
2852 static void hotkey_radio_sw_notify_change(void)
2853 {
2854 if (tp_features.hotkey_wlsw)
2855 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2856 "hotkey_radio_sw");
2857 }
2858
2859 /* sysfs hotkey tablet mode (pollable) --------------------------------- */
2860 static ssize_t hotkey_tablet_mode_show(struct device *dev,
2861 struct device_attribute *attr,
2862 char *buf)
2863 {
2864 int res, s;
2865 res = hotkey_get_tablet_mode(&s);
2866 if (res < 0)
2867 return res;
2868
2869 return snprintf(buf, PAGE_SIZE, "%d\n", !!s);
2870 }
2871
2872 static struct device_attribute dev_attr_hotkey_tablet_mode =
2873 __ATTR(hotkey_tablet_mode, S_IRUGO, hotkey_tablet_mode_show, NULL);
2874
2875 static void hotkey_tablet_mode_notify_change(void)
2876 {
2877 if (tp_features.hotkey_tablet)
2878 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2879 "hotkey_tablet_mode");
2880 }
2881
2882 /* sysfs wakeup reason (pollable) -------------------------------------- */
2883 static ssize_t hotkey_wakeup_reason_show(struct device *dev,
2884 struct device_attribute *attr,
2885 char *buf)
2886 {
2887 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_wakeup_reason);
2888 }
2889
2890 static struct device_attribute dev_attr_hotkey_wakeup_reason =
2891 __ATTR(wakeup_reason, S_IRUGO, hotkey_wakeup_reason_show, NULL);
2892
2893 static void hotkey_wakeup_reason_notify_change(void)
2894 {
2895 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2896 "wakeup_reason");
2897 }
2898
2899 /* sysfs wakeup hotunplug_complete (pollable) -------------------------- */
2900 static ssize_t hotkey_wakeup_hotunplug_complete_show(struct device *dev,
2901 struct device_attribute *attr,
2902 char *buf)
2903 {
2904 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_autosleep_ack);
2905 }
2906
2907 static struct device_attribute dev_attr_hotkey_wakeup_hotunplug_complete =
2908 __ATTR(wakeup_hotunplug_complete, S_IRUGO,
2909 hotkey_wakeup_hotunplug_complete_show, NULL);
2910
2911 static void hotkey_wakeup_hotunplug_complete_notify_change(void)
2912 {
2913 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2914 "wakeup_hotunplug_complete");
2915 }
2916
2917 /* --------------------------------------------------------------------- */
2918
2919 static struct attribute *hotkey_attributes[] __initdata = {
2920 &dev_attr_hotkey_enable.attr,
2921 &dev_attr_hotkey_bios_enabled.attr,
2922 &dev_attr_hotkey_bios_mask.attr,
2923 &dev_attr_hotkey_wakeup_reason.attr,
2924 &dev_attr_hotkey_wakeup_hotunplug_complete.attr,
2925 &dev_attr_hotkey_mask.attr,
2926 &dev_attr_hotkey_all_mask.attr,
2927 &dev_attr_hotkey_recommended_mask.attr,
2928 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2929 &dev_attr_hotkey_source_mask.attr,
2930 &dev_attr_hotkey_poll_freq.attr,
2931 #endif
2932 };
2933
2934 /*
2935 * Sync both the hw and sw blocking state of all switches
2936 */
2937 static void tpacpi_send_radiosw_update(void)
2938 {
2939 int wlsw;
2940
2941 /*
2942 * We must sync all rfkill controllers *before* issuing any
2943 * rfkill input events, or we will race the rfkill core input
2944 * handler.
2945 *
2946 * tpacpi_inputdev_send_mutex works as a synchronization point
2947 * for the above.
2948 *
2949 * We optimize to avoid numerous calls to hotkey_get_wlsw.
2950 */
2951
2952 wlsw = hotkey_get_wlsw();
2953
2954 /* Sync hw blocking state first if it is hw-blocked */
2955 if (wlsw == TPACPI_RFK_RADIO_OFF)
2956 tpacpi_rfk_update_hwblock_state(true);
2957
2958 /* Sync sw blocking state */
2959 tpacpi_rfk_update_swstate_all();
2960
2961 /* Sync hw blocking state last if it is hw-unblocked */
2962 if (wlsw == TPACPI_RFK_RADIO_ON)
2963 tpacpi_rfk_update_hwblock_state(false);
2964
2965 /* Issue rfkill input event for WLSW switch */
2966 if (!(wlsw < 0)) {
2967 mutex_lock(&tpacpi_inputdev_send_mutex);
2968
2969 input_report_switch(tpacpi_inputdev,
2970 SW_RFKILL_ALL, (wlsw > 0));
2971 input_sync(tpacpi_inputdev);
2972
2973 mutex_unlock(&tpacpi_inputdev_send_mutex);
2974 }
2975
2976 /*
2977 * this can be unconditional, as we will poll state again
2978 * if userspace uses the notify to read data
2979 */
2980 hotkey_radio_sw_notify_change();
2981 }
2982
2983 static void hotkey_exit(void)
2984 {
2985 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2986 mutex_lock(&hotkey_mutex);
2987 hotkey_poll_stop_sync();
2988 mutex_unlock(&hotkey_mutex);
2989 #endif
2990
2991 if (hotkey_dev_attributes)
2992 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
2993
2994 dbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_HKEY,
2995 "restoring original HKEY status and mask\n");
2996 /* yes, there is a bitwise or below, we want the
2997 * functions to be called even if one of them fail */
2998 if (((tp_features.hotkey_mask &&
2999 hotkey_mask_set(hotkey_orig_mask)) |
3000 hotkey_status_set(false)) != 0)
3001 pr_err("failed to restore hot key mask "
3002 "to BIOS defaults\n");
3003 }
3004
3005 static void __init hotkey_unmap(const unsigned int scancode)
3006 {
3007 if (hotkey_keycode_map[scancode] != KEY_RESERVED) {
3008 clear_bit(hotkey_keycode_map[scancode],
3009 tpacpi_inputdev->keybit);
3010 hotkey_keycode_map[scancode] = KEY_RESERVED;
3011 }
3012 }
3013
3014 /*
3015 * HKEY quirks:
3016 * TPACPI_HK_Q_INIMASK: Supports FN+F3,FN+F4,FN+F12
3017 */
3018
3019 #define TPACPI_HK_Q_INIMASK 0x0001
3020
3021 static const struct tpacpi_quirk tpacpi_hotkey_qtable[] __initconst = {
3022 TPACPI_Q_IBM('I', 'H', TPACPI_HK_Q_INIMASK), /* 600E */
3023 TPACPI_Q_IBM('I', 'N', TPACPI_HK_Q_INIMASK), /* 600E */
3024 TPACPI_Q_IBM('I', 'D', TPACPI_HK_Q_INIMASK), /* 770, 770E, 770ED */
3025 TPACPI_Q_IBM('I', 'W', TPACPI_HK_Q_INIMASK), /* A20m */
3026 TPACPI_Q_IBM('I', 'V', TPACPI_HK_Q_INIMASK), /* A20p */
3027 TPACPI_Q_IBM('1', '0', TPACPI_HK_Q_INIMASK), /* A21e, A22e */
3028 TPACPI_Q_IBM('K', 'U', TPACPI_HK_Q_INIMASK), /* A21e */
3029 TPACPI_Q_IBM('K', 'X', TPACPI_HK_Q_INIMASK), /* A21m, A22m */
3030 TPACPI_Q_IBM('K', 'Y', TPACPI_HK_Q_INIMASK), /* A21p, A22p */
3031 TPACPI_Q_IBM('1', 'B', TPACPI_HK_Q_INIMASK), /* A22e */
3032 TPACPI_Q_IBM('1', '3', TPACPI_HK_Q_INIMASK), /* A22m */
3033 TPACPI_Q_IBM('1', 'E', TPACPI_HK_Q_INIMASK), /* A30/p (0) */
3034 TPACPI_Q_IBM('1', 'C', TPACPI_HK_Q_INIMASK), /* R30 */
3035 TPACPI_Q_IBM('1', 'F', TPACPI_HK_Q_INIMASK), /* R31 */
3036 TPACPI_Q_IBM('I', 'Y', TPACPI_HK_Q_INIMASK), /* T20 */
3037 TPACPI_Q_IBM('K', 'Z', TPACPI_HK_Q_INIMASK), /* T21 */
3038 TPACPI_Q_IBM('1', '6', TPACPI_HK_Q_INIMASK), /* T22 */
3039 TPACPI_Q_IBM('I', 'Z', TPACPI_HK_Q_INIMASK), /* X20, X21 */
3040 TPACPI_Q_IBM('1', 'D', TPACPI_HK_Q_INIMASK), /* X22, X23, X24 */
3041 };
3042
3043 typedef u16 tpacpi_keymap_entry_t;
3044 typedef tpacpi_keymap_entry_t tpacpi_keymap_t[TPACPI_HOTKEY_MAP_LEN];
3045
3046 static int __init hotkey_init(struct ibm_init_struct *iibm)
3047 {
3048 /* Requirements for changing the default keymaps:
3049 *
3050 * 1. Many of the keys are mapped to KEY_RESERVED for very
3051 * good reasons. Do not change them unless you have deep
3052 * knowledge on the IBM and Lenovo ThinkPad firmware for
3053 * the various ThinkPad models. The driver behaves
3054 * differently for KEY_RESERVED: such keys have their
3055 * hot key mask *unset* in mask_recommended, and also
3056 * in the initial hot key mask programmed into the
3057 * firmware at driver load time, which means the firm-
3058 * ware may react very differently if you change them to
3059 * something else;
3060 *
3061 * 2. You must be subscribed to the linux-thinkpad and
3062 * ibm-acpi-devel mailing lists, and you should read the
3063 * list archives since 2007 if you want to change the
3064 * keymaps. This requirement exists so that you will
3065 * know the past history of problems with the thinkpad-
3066 * acpi driver keymaps, and also that you will be
3067 * listening to any bug reports;
3068 *
3069 * 3. Do not send thinkpad-acpi specific patches directly to
3070 * for merging, *ever*. Send them to the linux-acpi
3071 * mailinglist for comments. Merging is to be done only
3072 * through acpi-test and the ACPI maintainer.
3073 *
3074 * If the above is too much to ask, don't change the keymap.
3075 * Ask the thinkpad-acpi maintainer to do it, instead.
3076 */
3077
3078 enum keymap_index {
3079 TPACPI_KEYMAP_IBM_GENERIC = 0,
3080 TPACPI_KEYMAP_LENOVO_GENERIC,
3081 };
3082
3083 static const tpacpi_keymap_t tpacpi_keymaps[] __initconst = {
3084 /* Generic keymap for IBM ThinkPads */
3085 [TPACPI_KEYMAP_IBM_GENERIC] = {
3086 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
3087 KEY_FN_F1, KEY_BATTERY, KEY_COFFEE, KEY_SLEEP,
3088 KEY_WLAN, KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
3089 KEY_FN_F9, KEY_FN_F10, KEY_FN_F11, KEY_SUSPEND,
3090
3091 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
3092 KEY_UNKNOWN, /* 0x0C: FN+BACKSPACE */
3093 KEY_UNKNOWN, /* 0x0D: FN+INSERT */
3094 KEY_UNKNOWN, /* 0x0E: FN+DELETE */
3095
3096 /* brightness: firmware always reacts to them */
3097 KEY_RESERVED, /* 0x0F: FN+HOME (brightness up) */
3098 KEY_RESERVED, /* 0x10: FN+END (brightness down) */
3099
3100 /* Thinklight: firmware always react to it */
3101 KEY_RESERVED, /* 0x11: FN+PGUP (thinklight toggle) */
3102
3103 KEY_UNKNOWN, /* 0x12: FN+PGDOWN */
3104 KEY_ZOOM, /* 0x13: FN+SPACE (zoom) */
3105
3106 /* Volume: firmware always react to it and reprograms
3107 * the built-in *extra* mixer. Never map it to control
3108 * another mixer by default. */
3109 KEY_RESERVED, /* 0x14: VOLUME UP */
3110 KEY_RESERVED, /* 0x15: VOLUME DOWN */
3111 KEY_RESERVED, /* 0x16: MUTE */
3112
3113 KEY_VENDOR, /* 0x17: Thinkpad/AccessIBM/Lenovo */
3114
3115 /* (assignments unknown, please report if found) */
3116 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3117 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3118 },
3119
3120 /* Generic keymap for Lenovo ThinkPads */
3121 [TPACPI_KEYMAP_LENOVO_GENERIC] = {
3122 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
3123 KEY_FN_F1, KEY_COFFEE, KEY_BATTERY, KEY_SLEEP,
3124 KEY_WLAN, KEY_CAMERA, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
3125 KEY_FN_F9, KEY_FN_F10, KEY_FN_F11, KEY_SUSPEND,
3126
3127 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
3128 KEY_UNKNOWN, /* 0x0C: FN+BACKSPACE */
3129 KEY_UNKNOWN, /* 0x0D: FN+INSERT */
3130 KEY_UNKNOWN, /* 0x0E: FN+DELETE */
3131
3132 /* These should be enabled --only-- when ACPI video
3133 * is disabled (i.e. in "vendor" mode), and are handled
3134 * in a special way by the init code */
3135 KEY_BRIGHTNESSUP, /* 0x0F: FN+HOME (brightness up) */
3136 KEY_BRIGHTNESSDOWN, /* 0x10: FN+END (brightness down) */
3137
3138 KEY_RESERVED, /* 0x11: FN+PGUP (thinklight toggle) */
3139
3140 KEY_UNKNOWN, /* 0x12: FN+PGDOWN */
3141 KEY_ZOOM, /* 0x13: FN+SPACE (zoom) */
3142
3143 /* Volume: z60/z61, T60 (BIOS version?): firmware always
3144 * react to it and reprograms the built-in *extra* mixer.
3145 * Never map it to control another mixer by default.
3146 *
3147 * T60?, T61, R60?, R61: firmware and EC tries to send
3148 * these over the regular keyboard, so these are no-ops,
3149 * but there are still weird bugs re. MUTE, so do not
3150 * change unless you get test reports from all Lenovo
3151 * models. May cause the BIOS to interfere with the
3152 * HDA mixer.
3153 */
3154 KEY_RESERVED, /* 0x14: VOLUME UP */
3155 KEY_RESERVED, /* 0x15: VOLUME DOWN */
3156 KEY_RESERVED, /* 0x16: MUTE */
3157
3158 KEY_VENDOR, /* 0x17: Thinkpad/AccessIBM/Lenovo */
3159
3160 /* (assignments unknown, please report if found) */
3161 KEY_UNKNOWN, KEY_UNKNOWN,
3162
3163 /*
3164 * The mic mute button only sends 0x1a. It does not
3165 * automatically mute the mic or change the mute light.
3166 */
3167 KEY_MICMUTE, /* 0x1a: Mic mute (since ?400 or so) */
3168
3169 /* (assignments unknown, please report if found) */
3170 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3171 KEY_UNKNOWN,
3172 },
3173 };
3174
3175 static const struct tpacpi_quirk tpacpi_keymap_qtable[] __initconst = {
3176 /* Generic maps (fallback) */
3177 {
3178 .vendor = PCI_VENDOR_ID_IBM,
3179 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY,
3180 .quirks = TPACPI_KEYMAP_IBM_GENERIC,
3181 },
3182 {
3183 .vendor = PCI_VENDOR_ID_LENOVO,
3184 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY,
3185 .quirks = TPACPI_KEYMAP_LENOVO_GENERIC,
3186 },
3187 };
3188
3189 #define TPACPI_HOTKEY_MAP_SIZE sizeof(tpacpi_keymap_t)
3190 #define TPACPI_HOTKEY_MAP_TYPESIZE sizeof(tpacpi_keymap_entry_t)
3191
3192 int res, i;
3193 int status;
3194 int hkeyv;
3195 bool radiosw_state = false;
3196 bool tabletsw_state = false;
3197
3198 unsigned long quirks;
3199 unsigned long keymap_id;
3200
3201 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3202 "initializing hotkey subdriver\n");
3203
3204 BUG_ON(!tpacpi_inputdev);
3205 BUG_ON(tpacpi_inputdev->open != NULL ||
3206 tpacpi_inputdev->close != NULL);
3207
3208 TPACPI_ACPIHANDLE_INIT(hkey);
3209 mutex_init(&hotkey_mutex);
3210
3211 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
3212 mutex_init(&hotkey_thread_data_mutex);
3213 #endif
3214
3215 /* hotkey not supported on 570 */
3216 tp_features.hotkey = hkey_handle != NULL;
3217
3218 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3219 "hotkeys are %s\n",
3220 str_supported(tp_features.hotkey));
3221
3222 if (!tp_features.hotkey)
3223 return 1;
3224
3225 quirks = tpacpi_check_quirks(tpacpi_hotkey_qtable,
3226 ARRAY_SIZE(tpacpi_hotkey_qtable));
3227
3228 tpacpi_disable_brightness_delay();
3229
3230 /* MUST have enough space for all attributes to be added to
3231 * hotkey_dev_attributes */
3232 hotkey_dev_attributes = create_attr_set(
3233 ARRAY_SIZE(hotkey_attributes) + 2,
3234 NULL);
3235 if (!hotkey_dev_attributes)
3236 return -ENOMEM;
3237 res = add_many_to_attr_set(hotkey_dev_attributes,
3238 hotkey_attributes,
3239 ARRAY_SIZE(hotkey_attributes));
3240 if (res)
3241 goto err_exit;
3242
3243 /* mask not supported on 600e/x, 770e, 770x, A21e, A2xm/p,
3244 A30, R30, R31, T20-22, X20-21, X22-24. Detected by checking
3245 for HKEY interface version 0x100 */
3246 if (acpi_evalf(hkey_handle, &hkeyv, "MHKV", "qd")) {
3247 if ((hkeyv >> 8) != 1) {
3248 pr_err("unknown version of the HKEY interface: 0x%x\n",
3249 hkeyv);
3250 pr_err("please report this to %s\n", TPACPI_MAIL);
3251 } else {
3252 /*
3253 * MHKV 0x100 in A31, R40, R40e,
3254 * T4x, X31, and later
3255 */
3256 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3257 "firmware HKEY interface version: 0x%x\n",
3258 hkeyv);
3259
3260 /* Paranoia check AND init hotkey_all_mask */
3261 if (!acpi_evalf(hkey_handle, &hotkey_all_mask,
3262 "MHKA", "qd")) {
3263 pr_err("missing MHKA handler, "
3264 "please report this to %s\n",
3265 TPACPI_MAIL);
3266 /* Fallback: pre-init for FN+F3,F4,F12 */
3267 hotkey_all_mask = 0x080cU;
3268 } else {
3269 tp_features.hotkey_mask = 1;
3270 }
3271 }
3272 }
3273
3274 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3275 "hotkey masks are %s\n",
3276 str_supported(tp_features.hotkey_mask));
3277
3278 /* Init hotkey_all_mask if not initialized yet */
3279 if (!tp_features.hotkey_mask && !hotkey_all_mask &&
3280 (quirks & TPACPI_HK_Q_INIMASK))
3281 hotkey_all_mask = 0x080cU; /* FN+F12, FN+F4, FN+F3 */
3282
3283 /* Init hotkey_acpi_mask and hotkey_orig_mask */
3284 if (tp_features.hotkey_mask) {
3285 /* hotkey_source_mask *must* be zero for
3286 * the first hotkey_mask_get to return hotkey_orig_mask */
3287 res = hotkey_mask_get();
3288 if (res)
3289 goto err_exit;
3290
3291 hotkey_orig_mask = hotkey_acpi_mask;
3292 } else {
3293 hotkey_orig_mask = hotkey_all_mask;
3294 hotkey_acpi_mask = hotkey_all_mask;
3295 }
3296
3297 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3298 if (dbg_wlswemul) {
3299 tp_features.hotkey_wlsw = 1;
3300 radiosw_state = !!tpacpi_wlsw_emulstate;
3301 pr_info("radio switch emulation enabled\n");
3302 } else
3303 #endif
3304 /* Not all thinkpads have a hardware radio switch */
3305 if (acpi_evalf(hkey_handle, &status, "WLSW", "qd")) {
3306 tp_features.hotkey_wlsw = 1;
3307 radiosw_state = !!status;
3308 pr_info("radio switch found; radios are %s\n",
3309 enabled(status, 0));
3310 }
3311 if (tp_features.hotkey_wlsw)
3312 res = add_to_attr_set(hotkey_dev_attributes,
3313 &dev_attr_hotkey_radio_sw.attr);
3314
3315 /* For X41t, X60t, X61t Tablets... */
3316 if (!res && acpi_evalf(hkey_handle, &status, "MHKG", "qd")) {
3317 tp_features.hotkey_tablet = 1;
3318 tabletsw_state = !!(status & TP_HOTKEY_TABLET_MASK);
3319 pr_info("possible tablet mode switch found; "
3320 "ThinkPad in %s mode\n",
3321 (tabletsw_state) ? "tablet" : "laptop");
3322 res = add_to_attr_set(hotkey_dev_attributes,
3323 &dev_attr_hotkey_tablet_mode.attr);
3324 }
3325
3326 if (!res)
3327 res = register_attr_set_with_sysfs(
3328 hotkey_dev_attributes,
3329 &tpacpi_pdev->dev.kobj);
3330 if (res)
3331 goto err_exit;
3332
3333 /* Set up key map */
3334 hotkey_keycode_map = kmalloc(TPACPI_HOTKEY_MAP_SIZE,
3335 GFP_KERNEL);
3336 if (!hotkey_keycode_map) {
3337 pr_err("failed to allocate memory for key map\n");
3338 res = -ENOMEM;
3339 goto err_exit;
3340 }
3341
3342 keymap_id = tpacpi_check_quirks(tpacpi_keymap_qtable,
3343 ARRAY_SIZE(tpacpi_keymap_qtable));
3344 BUG_ON(keymap_id >= ARRAY_SIZE(tpacpi_keymaps));
3345 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3346 "using keymap number %lu\n", keymap_id);
3347
3348 memcpy(hotkey_keycode_map, &tpacpi_keymaps[keymap_id],
3349 TPACPI_HOTKEY_MAP_SIZE);
3350
3351 input_set_capability(tpacpi_inputdev, EV_MSC, MSC_SCAN);
3352 tpacpi_inputdev->keycodesize = TPACPI_HOTKEY_MAP_TYPESIZE;
3353 tpacpi_inputdev->keycodemax = TPACPI_HOTKEY_MAP_LEN;
3354 tpacpi_inputdev->keycode = hotkey_keycode_map;
3355 for (i = 0; i < TPACPI_HOTKEY_MAP_LEN; i++) {
3356 if (hotkey_keycode_map[i] != KEY_RESERVED) {
3357 input_set_capability(tpacpi_inputdev, EV_KEY,
3358 hotkey_keycode_map[i]);
3359 } else {
3360 if (i < sizeof(hotkey_reserved_mask)*8)
3361 hotkey_reserved_mask |= 1 << i;
3362 }
3363 }
3364
3365 if (tp_features.hotkey_wlsw) {
3366 input_set_capability(tpacpi_inputdev, EV_SW, SW_RFKILL_ALL);
3367 input_report_switch(tpacpi_inputdev,
3368 SW_RFKILL_ALL, radiosw_state);
3369 }
3370 if (tp_features.hotkey_tablet) {
3371 input_set_capability(tpacpi_inputdev, EV_SW, SW_TABLET_MODE);
3372 input_report_switch(tpacpi_inputdev,
3373 SW_TABLET_MODE, tabletsw_state);
3374 }
3375
3376 /* Do not issue duplicate brightness change events to
3377 * userspace. tpacpi_detect_brightness_capabilities() must have
3378 * been called before this point */
3379 if (acpi_video_backlight_support()) {
3380 pr_info("This ThinkPad has standard ACPI backlight "
3381 "brightness control, supported by the ACPI "
3382 "video driver\n");
3383 pr_notice("Disabling thinkpad-acpi brightness events "
3384 "by default...\n");
3385
3386 /* Disable brightness up/down on Lenovo thinkpads when
3387 * ACPI is handling them, otherwise it is plain impossible
3388 * for userspace to do something even remotely sane */
3389 hotkey_reserved_mask |=
3390 (1 << TP_ACPI_HOTKEYSCAN_FNHOME)
3391 | (1 << TP_ACPI_HOTKEYSCAN_FNEND);
3392 hotkey_unmap(TP_ACPI_HOTKEYSCAN_FNHOME);
3393 hotkey_unmap(TP_ACPI_HOTKEYSCAN_FNEND);
3394 }
3395
3396 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
3397 hotkey_source_mask = TPACPI_HKEY_NVRAM_GOOD_MASK
3398 & ~hotkey_all_mask
3399 & ~hotkey_reserved_mask;
3400
3401 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3402 "hotkey source mask 0x%08x, polling freq %u\n",
3403 hotkey_source_mask, hotkey_poll_freq);
3404 #endif
3405
3406 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3407 "enabling firmware HKEY event interface...\n");
3408 res = hotkey_status_set(true);
3409 if (res) {
3410 hotkey_exit();
3411 return res;
3412 }
3413 res = hotkey_mask_set(((hotkey_all_mask & ~hotkey_reserved_mask)
3414 | hotkey_driver_mask)
3415 & ~hotkey_source_mask);
3416 if (res < 0 && res != -ENXIO) {
3417 hotkey_exit();
3418 return res;
3419 }
3420 hotkey_user_mask = (hotkey_acpi_mask | hotkey_source_mask)
3421 & ~hotkey_reserved_mask;
3422 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3423 "initial masks: user=0x%08x, fw=0x%08x, poll=0x%08x\n",
3424 hotkey_user_mask, hotkey_acpi_mask, hotkey_source_mask);
3425
3426 tpacpi_inputdev->open = &hotkey_inputdev_open;
3427 tpacpi_inputdev->close = &hotkey_inputdev_close;
3428
3429 hotkey_poll_setup_safe(true);
3430
3431 return 0;
3432
3433 err_exit:
3434 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
3435 hotkey_dev_attributes = NULL;
3436
3437 return (res < 0)? res : 1;
3438 }
3439
3440 static bool hotkey_notify_hotkey(const u32 hkey,
3441 bool *send_acpi_ev,
3442 bool *ignore_acpi_ev)
3443 {
3444 /* 0x1000-0x1FFF: key presses */
3445 unsigned int scancode = hkey & 0xfff;
3446 *send_acpi_ev = true;
3447 *ignore_acpi_ev = false;
3448
3449 /* HKEY event 0x1001 is scancode 0x00 */
3450 if (scancode > 0 && scancode <= TPACPI_HOTKEY_MAP_LEN) {
3451 scancode--;
3452 if (!(hotkey_source_mask & (1 << scancode))) {
3453 tpacpi_input_send_key_masked(scancode);
3454 *send_acpi_ev = false;
3455 } else {
3456 *ignore_acpi_ev = true;
3457 }
3458 return true;
3459 }
3460 return false;
3461 }
3462
3463 static bool hotkey_notify_wakeup(const u32 hkey,
3464 bool *send_acpi_ev,
3465 bool *ignore_acpi_ev)
3466 {
3467 /* 0x2000-0x2FFF: Wakeup reason */
3468 *send_acpi_ev = true;
3469 *ignore_acpi_ev = false;
3470
3471 switch (hkey) {
3472 case TP_HKEY_EV_WKUP_S3_UNDOCK: /* suspend, undock */
3473 case TP_HKEY_EV_WKUP_S4_UNDOCK: /* hibernation, undock */
3474 hotkey_wakeup_reason = TP_ACPI_WAKEUP_UNDOCK;
3475 *ignore_acpi_ev = true;
3476 break;
3477
3478 case TP_HKEY_EV_WKUP_S3_BAYEJ: /* suspend, bay eject */
3479 case TP_HKEY_EV_WKUP_S4_BAYEJ: /* hibernation, bay eject */
3480 hotkey_wakeup_reason = TP_ACPI_WAKEUP_BAYEJ;
3481 *ignore_acpi_ev = true;
3482 break;
3483
3484 case TP_HKEY_EV_WKUP_S3_BATLOW: /* Battery on critical low level/S3 */
3485 case TP_HKEY_EV_WKUP_S4_BATLOW: /* Battery on critical low level/S4 */
3486 pr_alert("EMERGENCY WAKEUP: battery almost empty\n");
3487 /* how to auto-heal: */
3488 /* 2313: woke up from S3, go to S4/S5 */
3489 /* 2413: woke up from S4, go to S5 */
3490 break;
3491
3492 default:
3493 return false;
3494 }
3495
3496 if (hotkey_wakeup_reason != TP_ACPI_WAKEUP_NONE) {
3497 pr_info("woke up due to a hot-unplug request...\n");
3498 hotkey_wakeup_reason_notify_change();
3499 }
3500 return true;
3501 }
3502
3503 static bool hotkey_notify_dockevent(const u32 hkey,
3504 bool *send_acpi_ev,
3505 bool *ignore_acpi_ev)
3506 {
3507 /* 0x4000-0x4FFF: dock-related events */
3508 *send_acpi_ev = true;
3509 *ignore_acpi_ev = false;
3510
3511 switch (hkey) {
3512 case TP_HKEY_EV_UNDOCK_ACK:
3513 /* ACPI undock operation completed after wakeup */
3514 hotkey_autosleep_ack = 1;
3515 pr_info("undocked\n");
3516 hotkey_wakeup_hotunplug_complete_notify_change();
3517 return true;
3518
3519 case TP_HKEY_EV_HOTPLUG_DOCK: /* docked to port replicator */
3520 pr_info("docked into hotplug port replicator\n");
3521 return true;
3522 case TP_HKEY_EV_HOTPLUG_UNDOCK: /* undocked from port replicator */
3523 pr_info("undocked from hotplug port replicator\n");
3524 return true;
3525
3526 default:
3527 return false;
3528 }
3529 }
3530
3531 static bool hotkey_notify_usrevent(const u32 hkey,
3532 bool *send_acpi_ev,
3533 bool *ignore_acpi_ev)
3534 {
3535 /* 0x5000-0x5FFF: human interface helpers */
3536 *send_acpi_ev = true;
3537 *ignore_acpi_ev = false;
3538
3539 switch (hkey) {
3540 case TP_HKEY_EV_PEN_INSERTED: /* X61t: tablet pen inserted into bay */
3541 case TP_HKEY_EV_PEN_REMOVED: /* X61t: tablet pen removed from bay */
3542 return true;
3543
3544 case TP_HKEY_EV_TABLET_TABLET: /* X41t-X61t: tablet mode */
3545 case TP_HKEY_EV_TABLET_NOTEBOOK: /* X41t-X61t: normal mode */
3546 tpacpi_input_send_tabletsw();
3547 hotkey_tablet_mode_notify_change();
3548 *send_acpi_ev = false;
3549 return true;
3550
3551 case TP_HKEY_EV_LID_CLOSE: /* Lid closed */
3552 case TP_HKEY_EV_LID_OPEN: /* Lid opened */
3553 case TP_HKEY_EV_BRGHT_CHANGED: /* brightness changed */
3554 /* do not propagate these events */
3555 *ignore_acpi_ev = true;
3556 return true;
3557
3558 default:
3559 return false;
3560 }
3561 }
3562
3563 static void thermal_dump_all_sensors(void);
3564
3565 static bool hotkey_notify_6xxx(const u32 hkey,
3566 bool *send_acpi_ev,
3567 bool *ignore_acpi_ev)
3568 {
3569 bool known = true;
3570
3571 /* 0x6000-0x6FFF: thermal alarms/notices and keyboard events */
3572 *send_acpi_ev = true;
3573 *ignore_acpi_ev = false;
3574
3575 switch (hkey) {
3576 case TP_HKEY_EV_THM_TABLE_CHANGED:
3577 pr_info("EC reports that Thermal Table has changed\n");
3578 /* recommended action: do nothing, we don't have
3579 * Lenovo ATM information */
3580 return true;
3581 case TP_HKEY_EV_ALARM_BAT_HOT:
3582 pr_crit("THERMAL ALARM: battery is too hot!\n");
3583 /* recommended action: warn user through gui */
3584 break;
3585 case TP_HKEY_EV_ALARM_BAT_XHOT:
3586 pr_alert("THERMAL EMERGENCY: battery is extremely hot!\n");
3587 /* recommended action: immediate sleep/hibernate */
3588 break;
3589 case TP_HKEY_EV_ALARM_SENSOR_HOT:
3590 pr_crit("THERMAL ALARM: "
3591 "a sensor reports something is too hot!\n");
3592 /* recommended action: warn user through gui, that */
3593 /* some internal component is too hot */
3594 break;
3595 case TP_HKEY_EV_ALARM_SENSOR_XHOT:
3596 pr_alert("THERMAL EMERGENCY: "
3597 "a sensor reports something is extremely hot!\n");
3598 /* recommended action: immediate sleep/hibernate */
3599 break;
3600 case TP_HKEY_EV_AC_CHANGED:
3601 /* X120e, X121e, X220, X220i, X220t, X230, T420, T420s, W520:
3602 * AC status changed; can be triggered by plugging or
3603 * unplugging AC adapter, docking or undocking. */
3604
3605 /* fallthrough */
3606
3607 case TP_HKEY_EV_KEY_NUMLOCK:
3608 case TP_HKEY_EV_KEY_FN:
3609 /* key press events, we just ignore them as long as the EC
3610 * is still reporting them in the normal keyboard stream */
3611 *send_acpi_ev = false;
3612 *ignore_acpi_ev = true;
3613 return true;
3614
3615 default:
3616 pr_warn("unknown possible thermal alarm or keyboard event received\n");
3617 known = false;
3618 }
3619
3620 thermal_dump_all_sensors();
3621
3622 return known;
3623 }
3624
3625 static void hotkey_notify(struct ibm_struct *ibm, u32 event)
3626 {
3627 u32 hkey;
3628 bool send_acpi_ev;
3629 bool ignore_acpi_ev;
3630 bool known_ev;
3631
3632 if (event != 0x80) {
3633 pr_err("unknown HKEY notification event %d\n", event);
3634 /* forward it to userspace, maybe it knows how to handle it */
3635 acpi_bus_generate_netlink_event(
3636 ibm->acpi->device->pnp.device_class,
3637 dev_name(&ibm->acpi->device->dev),
3638 event, 0);
3639 return;
3640 }
3641
3642 while (1) {
3643 if (!acpi_evalf(hkey_handle, &hkey, "MHKP", "d")) {
3644 pr_err("failed to retrieve HKEY event\n");
3645 return;
3646 }
3647
3648 if (hkey == 0) {
3649 /* queue empty */
3650 return;
3651 }
3652
3653 send_acpi_ev = true;
3654 ignore_acpi_ev = false;
3655
3656 switch (hkey >> 12) {
3657 case 1:
3658 /* 0x1000-0x1FFF: key presses */
3659 known_ev = hotkey_notify_hotkey(hkey, &send_acpi_ev,
3660 &ignore_acpi_ev);
3661 break;
3662 case 2:
3663 /* 0x2000-0x2FFF: Wakeup reason */
3664 known_ev = hotkey_notify_wakeup(hkey, &send_acpi_ev,
3665 &ignore_acpi_ev);
3666 break;
3667 case 3:
3668 /* 0x3000-0x3FFF: bay-related wakeups */
3669 switch (hkey) {
3670 case TP_HKEY_EV_BAYEJ_ACK:
3671 hotkey_autosleep_ack = 1;
3672 pr_info("bay ejected\n");
3673 hotkey_wakeup_hotunplug_complete_notify_change();
3674 known_ev = true;
3675 break;
3676 case TP_HKEY_EV_OPTDRV_EJ:
3677 /* FIXME: kick libata if SATA link offline */
3678 known_ev = true;
3679 break;
3680 default:
3681 known_ev = false;
3682 }
3683 break;
3684 case 4:
3685 /* 0x4000-0x4FFF: dock-related events */
3686 known_ev = hotkey_notify_dockevent(hkey, &send_acpi_ev,
3687 &ignore_acpi_ev);
3688 break;
3689 case 5:
3690 /* 0x5000-0x5FFF: human interface helpers */
3691 known_ev = hotkey_notify_usrevent(hkey, &send_acpi_ev,
3692 &ignore_acpi_ev);
3693 break;
3694 case 6:
3695 /* 0x6000-0x6FFF: thermal alarms/notices and
3696 * keyboard events */
3697 known_ev = hotkey_notify_6xxx(hkey, &send_acpi_ev,
3698 &ignore_acpi_ev);
3699 break;
3700 case 7:
3701 /* 0x7000-0x7FFF: misc */
3702 if (tp_features.hotkey_wlsw &&
3703 hkey == TP_HKEY_EV_RFKILL_CHANGED) {
3704 tpacpi_send_radiosw_update();
3705 send_acpi_ev = 0;
3706 known_ev = true;
3707 break;
3708 }
3709 /* fallthrough to default */
3710 default:
3711 known_ev = false;
3712 }
3713 if (!known_ev) {
3714 pr_notice("unhandled HKEY event 0x%04x\n", hkey);
3715 pr_notice("please report the conditions when this "
3716 "event happened to %s\n", TPACPI_MAIL);
3717 }
3718
3719 /* netlink events */
3720 if (!ignore_acpi_ev && send_acpi_ev) {
3721 acpi_bus_generate_netlink_event(
3722 ibm->acpi->device->pnp.device_class,
3723 dev_name(&ibm->acpi->device->dev),
3724 event, hkey);
3725 }
3726 }
3727 }
3728
3729 static void hotkey_suspend(void)
3730 {
3731 /* Do these on suspend, we get the events on early resume! */
3732 hotkey_wakeup_reason = TP_ACPI_WAKEUP_NONE;
3733 hotkey_autosleep_ack = 0;
3734 }
3735
3736 static void hotkey_resume(void)
3737 {
3738 tpacpi_disable_brightness_delay();
3739
3740 if (hotkey_status_set(true) < 0 ||
3741 hotkey_mask_set(hotkey_acpi_mask) < 0)
3742 pr_err("error while attempting to reset the event "
3743 "firmware interface\n");
3744
3745 tpacpi_send_radiosw_update();
3746 hotkey_tablet_mode_notify_change();
3747 hotkey_wakeup_reason_notify_change();
3748 hotkey_wakeup_hotunplug_complete_notify_change();
3749 hotkey_poll_setup_safe(false);
3750 }
3751
3752 /* procfs -------------------------------------------------------------- */
3753 static int hotkey_read(struct seq_file *m)
3754 {
3755 int res, status;
3756
3757 if (!tp_features.hotkey) {
3758 seq_printf(m, "status:\t\tnot supported\n");
3759 return 0;
3760 }
3761
3762 if (mutex_lock_killable(&hotkey_mutex))
3763 return -ERESTARTSYS;
3764 res = hotkey_status_get(&status);
3765 if (!res)
3766 res = hotkey_mask_get();
3767 mutex_unlock(&hotkey_mutex);
3768 if (res)
3769 return res;
3770
3771 seq_printf(m, "status:\t\t%s\n", enabled(status, 0));
3772 if (hotkey_all_mask) {
3773 seq_printf(m, "mask:\t\t0x%08x\n", hotkey_user_mask);
3774 seq_printf(m, "commands:\tenable, disable, reset, <mask>\n");
3775 } else {
3776 seq_printf(m, "mask:\t\tnot supported\n");
3777 seq_printf(m, "commands:\tenable, disable, reset\n");
3778 }
3779
3780 return 0;
3781 }
3782
3783 static void hotkey_enabledisable_warn(bool enable)
3784 {
3785 tpacpi_log_usertask("procfs hotkey enable/disable");
3786 if (!WARN((tpacpi_lifecycle == TPACPI_LIFE_RUNNING || !enable),
3787 pr_fmt("hotkey enable/disable functionality has been "
3788 "removed from the driver. "
3789 "Hotkeys are always enabled.\n")))
3790 pr_err("Please remove the hotkey=enable module "
3791 "parameter, it is deprecated. "
3792 "Hotkeys are always enabled.\n");
3793 }
3794
3795 static int hotkey_write(char *buf)
3796 {
3797 int res;
3798 u32 mask;
3799 char *cmd;
3800
3801 if (!tp_features.hotkey)
3802 return -ENODEV;
3803
3804 if (mutex_lock_killable(&hotkey_mutex))
3805 return -ERESTARTSYS;
3806
3807 mask = hotkey_user_mask;
3808
3809 res = 0;
3810 while ((cmd = next_cmd(&buf))) {
3811 if (strlencmp(cmd, "enable") == 0) {
3812 hotkey_enabledisable_warn(1);
3813 } else if (strlencmp(cmd, "disable") == 0) {
3814 hotkey_enabledisable_warn(0);
3815 res = -EPERM;
3816 } else if (strlencmp(cmd, "reset") == 0) {
3817 mask = (hotkey_all_mask | hotkey_source_mask)
3818 & ~hotkey_reserved_mask;
3819 } else if (sscanf(cmd, "0x%x", &mask) == 1) {
3820 /* mask set */
3821 } else if (sscanf(cmd, "%x", &mask) == 1) {
3822 /* mask set */
3823 } else {
3824 res = -EINVAL;
3825 goto errexit;
3826 }
3827 }
3828
3829 if (!res) {
3830 tpacpi_disclose_usertask("procfs hotkey",
3831 "set mask to 0x%08x\n", mask);
3832 res = hotkey_user_mask_set(mask);
3833 }
3834
3835 errexit:
3836 mutex_unlock(&hotkey_mutex);
3837 return res;
3838 }
3839
3840 static const struct acpi_device_id ibm_htk_device_ids[] = {
3841 {TPACPI_ACPI_IBM_HKEY_HID, 0},
3842 {TPACPI_ACPI_LENOVO_HKEY_HID, 0},
3843 {"", 0},
3844 };
3845
3846 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver = {
3847 .hid = ibm_htk_device_ids,
3848 .notify = hotkey_notify,
3849 .handle = &hkey_handle,
3850 .type = ACPI_DEVICE_NOTIFY,
3851 };
3852
3853 static struct ibm_struct hotkey_driver_data = {
3854 .name = "hotkey",
3855 .read = hotkey_read,
3856 .write = hotkey_write,
3857 .exit = hotkey_exit,
3858 .resume = hotkey_resume,
3859 .suspend = hotkey_suspend,
3860 .acpi = &ibm_hotkey_acpidriver,
3861 };
3862
3863 /*************************************************************************
3864 * Bluetooth subdriver
3865 */
3866
3867 enum {
3868 /* ACPI GBDC/SBDC bits */
3869 TP_ACPI_BLUETOOTH_HWPRESENT = 0x01, /* Bluetooth hw available */
3870 TP_ACPI_BLUETOOTH_RADIOSSW = 0x02, /* Bluetooth radio enabled */
3871 TP_ACPI_BLUETOOTH_RESUMECTRL = 0x04, /* Bluetooth state at resume:
3872 0 = disable, 1 = enable */
3873 };
3874
3875 enum {
3876 /* ACPI \BLTH commands */
3877 TP_ACPI_BLTH_GET_ULTRAPORT_ID = 0x00, /* Get Ultraport BT ID */
3878 TP_ACPI_BLTH_GET_PWR_ON_RESUME = 0x01, /* Get power-on-resume state */
3879 TP_ACPI_BLTH_PWR_ON_ON_RESUME = 0x02, /* Resume powered on */
3880 TP_ACPI_BLTH_PWR_OFF_ON_RESUME = 0x03, /* Resume powered off */
3881 TP_ACPI_BLTH_SAVE_STATE = 0x05, /* Save state for S4/S5 */
3882 };
3883
3884 #define TPACPI_RFK_BLUETOOTH_SW_NAME "tpacpi_bluetooth_sw"
3885
3886 static int bluetooth_get_status(void)
3887 {
3888 int status;
3889
3890 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3891 if (dbg_bluetoothemul)
3892 return (tpacpi_bluetooth_emulstate) ?
3893 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
3894 #endif
3895
3896 if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
3897 return -EIO;
3898
3899 return ((status & TP_ACPI_BLUETOOTH_RADIOSSW) != 0) ?
3900 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
3901 }
3902
3903 static int bluetooth_set_status(enum tpacpi_rfkill_state state)
3904 {
3905 int status;
3906
3907 vdbg_printk(TPACPI_DBG_RFKILL,
3908 "will attempt to %s bluetooth\n",
3909 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable");
3910
3911 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3912 if (dbg_bluetoothemul) {
3913 tpacpi_bluetooth_emulstate = (state == TPACPI_RFK_RADIO_ON);
3914 return 0;
3915 }
3916 #endif
3917
3918 if (state == TPACPI_RFK_RADIO_ON)
3919 status = TP_ACPI_BLUETOOTH_RADIOSSW
3920 | TP_ACPI_BLUETOOTH_RESUMECTRL;
3921 else
3922 status = 0;
3923
3924 if (!acpi_evalf(hkey_handle, NULL, "SBDC", "vd", status))
3925 return -EIO;
3926
3927 return 0;
3928 }
3929
3930 /* sysfs bluetooth enable ---------------------------------------------- */
3931 static ssize_t bluetooth_enable_show(struct device *dev,
3932 struct device_attribute *attr,
3933 char *buf)
3934 {
3935 return tpacpi_rfk_sysfs_enable_show(TPACPI_RFK_BLUETOOTH_SW_ID,
3936 attr, buf);
3937 }
3938
3939 static ssize_t bluetooth_enable_store(struct device *dev,
3940 struct device_attribute *attr,
3941 const char *buf, size_t count)
3942 {
3943 return tpacpi_rfk_sysfs_enable_store(TPACPI_RFK_BLUETOOTH_SW_ID,
3944 attr, buf, count);
3945 }
3946
3947 static struct device_attribute dev_attr_bluetooth_enable =
3948 __ATTR(bluetooth_enable, S_IWUSR | S_IRUGO,
3949 bluetooth_enable_show, bluetooth_enable_store);
3950
3951 /* --------------------------------------------------------------------- */
3952
3953 static struct attribute *bluetooth_attributes[] = {
3954 &dev_attr_bluetooth_enable.attr,
3955 NULL
3956 };
3957
3958 static const struct attribute_group bluetooth_attr_group = {
3959 .attrs = bluetooth_attributes,
3960 };
3961
3962 static const struct tpacpi_rfk_ops bluetooth_tprfk_ops = {
3963 .get_status = bluetooth_get_status,
3964 .set_status = bluetooth_set_status,
3965 };
3966
3967 static void bluetooth_shutdown(void)
3968 {
3969 /* Order firmware to save current state to NVRAM */
3970 if (!acpi_evalf(NULL, NULL, "\\BLTH", "vd",
3971 TP_ACPI_BLTH_SAVE_STATE))
3972 pr_notice("failed to save bluetooth state to NVRAM\n");
3973 else
3974 vdbg_printk(TPACPI_DBG_RFKILL,
3975 "bluetooth state saved to NVRAM\n");
3976 }
3977
3978 static void bluetooth_exit(void)
3979 {
3980 sysfs_remove_group(&tpacpi_pdev->dev.kobj,
3981 &bluetooth_attr_group);
3982
3983 tpacpi_destroy_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID);
3984
3985 bluetooth_shutdown();
3986 }
3987
3988 static int __init bluetooth_init(struct ibm_init_struct *iibm)
3989 {
3990 int res;
3991 int status = 0;
3992
3993 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
3994 "initializing bluetooth subdriver\n");
3995
3996 TPACPI_ACPIHANDLE_INIT(hkey);
3997
3998 /* bluetooth not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
3999 G4x, R30, R31, R40e, R50e, T20-22, X20-21 */
4000 tp_features.bluetooth = hkey_handle &&
4001 acpi_evalf(hkey_handle, &status, "GBDC", "qd");
4002
4003 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4004 "bluetooth is %s, status 0x%02x\n",
4005 str_supported(tp_features.bluetooth),
4006 status);
4007
4008 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4009 if (dbg_bluetoothemul) {
4010 tp_features.bluetooth = 1;
4011 pr_info("bluetooth switch emulation enabled\n");
4012 } else
4013 #endif
4014 if (tp_features.bluetooth &&
4015 !(status & TP_ACPI_BLUETOOTH_HWPRESENT)) {
4016 /* no bluetooth hardware present in system */
4017 tp_features.bluetooth = 0;
4018 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4019 "bluetooth hardware not installed\n");
4020 }
4021
4022 if (!tp_features.bluetooth)
4023 return 1;
4024
4025 res = tpacpi_new_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID,
4026 &bluetooth_tprfk_ops,
4027 RFKILL_TYPE_BLUETOOTH,
4028 TPACPI_RFK_BLUETOOTH_SW_NAME,
4029 true);
4030 if (res)
4031 return res;
4032
4033 res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
4034 &bluetooth_attr_group);
4035 if (res) {
4036 tpacpi_destroy_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID);
4037 return res;
4038 }
4039
4040 return 0;
4041 }
4042
4043 /* procfs -------------------------------------------------------------- */
4044 static int bluetooth_read(struct seq_file *m)
4045 {
4046 return tpacpi_rfk_procfs_read(TPACPI_RFK_BLUETOOTH_SW_ID, m);
4047 }
4048
4049 static int bluetooth_write(char *buf)
4050 {
4051 return tpacpi_rfk_procfs_write(TPACPI_RFK_BLUETOOTH_SW_ID, buf);
4052 }
4053
4054 static struct ibm_struct bluetooth_driver_data = {
4055 .name = "bluetooth",
4056 .read = bluetooth_read,
4057 .write = bluetooth_write,
4058 .exit = bluetooth_exit,
4059 .shutdown = bluetooth_shutdown,
4060 };
4061
4062 /*************************************************************************
4063 * Wan subdriver
4064 */
4065
4066 enum {
4067 /* ACPI GWAN/SWAN bits */
4068 TP_ACPI_WANCARD_HWPRESENT = 0x01, /* Wan hw available */
4069 TP_ACPI_WANCARD_RADIOSSW = 0x02, /* Wan radio enabled */
4070 TP_ACPI_WANCARD_RESUMECTRL = 0x04, /* Wan state at resume:
4071 0 = disable, 1 = enable */
4072 };
4073
4074 #define TPACPI_RFK_WWAN_SW_NAME "tpacpi_wwan_sw"
4075
4076 static int wan_get_status(void)
4077 {
4078 int status;
4079
4080 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4081 if (dbg_wwanemul)
4082 return (tpacpi_wwan_emulstate) ?
4083 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4084 #endif
4085
4086 if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
4087 return -EIO;
4088
4089 return ((status & TP_ACPI_WANCARD_RADIOSSW) != 0) ?
4090 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4091 }
4092
4093 static int wan_set_status(enum tpacpi_rfkill_state state)
4094 {
4095 int status;
4096
4097 vdbg_printk(TPACPI_DBG_RFKILL,
4098 "will attempt to %s wwan\n",
4099 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable");
4100
4101 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4102 if (dbg_wwanemul) {
4103 tpacpi_wwan_emulstate = (state == TPACPI_RFK_RADIO_ON);
4104 return 0;
4105 }
4106 #endif
4107
4108 if (state == TPACPI_RFK_RADIO_ON)
4109 status = TP_ACPI_WANCARD_RADIOSSW
4110 | TP_ACPI_WANCARD_RESUMECTRL;
4111 else
4112 status = 0;
4113
4114 if (!acpi_evalf(hkey_handle, NULL, "SWAN", "vd", status))
4115 return -EIO;
4116
4117 return 0;
4118 }
4119
4120 /* sysfs wan enable ---------------------------------------------------- */
4121 static ssize_t wan_enable_show(struct device *dev,
4122 struct device_attribute *attr,
4123 char *buf)
4124 {
4125 return tpacpi_rfk_sysfs_enable_show(TPACPI_RFK_WWAN_SW_ID,
4126 attr, buf);
4127 }
4128
4129 static ssize_t wan_enable_store(struct device *dev,
4130 struct device_attribute *attr,
4131 const char *buf, size_t count)
4132 {
4133 return tpacpi_rfk_sysfs_enable_store(TPACPI_RFK_WWAN_SW_ID,
4134 attr, buf, count);
4135 }
4136
4137 static struct device_attribute dev_attr_wan_enable =
4138 __ATTR(wwan_enable, S_IWUSR | S_IRUGO,
4139 wan_enable_show, wan_enable_store);
4140
4141 /* --------------------------------------------------------------------- */
4142
4143 static struct attribute *wan_attributes[] = {
4144 &dev_attr_wan_enable.attr,
4145 NULL
4146 };
4147
4148 static const struct attribute_group wan_attr_group = {
4149 .attrs = wan_attributes,
4150 };
4151
4152 static const struct tpacpi_rfk_ops wan_tprfk_ops = {
4153 .get_status = wan_get_status,
4154 .set_status = wan_set_status,
4155 };
4156
4157 static void wan_shutdown(void)
4158 {
4159 /* Order firmware to save current state to NVRAM */
4160 if (!acpi_evalf(NULL, NULL, "\\WGSV", "vd",
4161 TP_ACPI_WGSV_SAVE_STATE))
4162 pr_notice("failed to save WWAN state to NVRAM\n");
4163 else
4164 vdbg_printk(TPACPI_DBG_RFKILL,
4165 "WWAN state saved to NVRAM\n");
4166 }
4167
4168 static void wan_exit(void)
4169 {
4170 sysfs_remove_group(&tpacpi_pdev->dev.kobj,
4171 &wan_attr_group);
4172
4173 tpacpi_destroy_rfkill(TPACPI_RFK_WWAN_SW_ID);
4174
4175 wan_shutdown();
4176 }
4177
4178 static int __init wan_init(struct ibm_init_struct *iibm)
4179 {
4180 int res;
4181 int status = 0;
4182
4183 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4184 "initializing wan subdriver\n");
4185
4186 TPACPI_ACPIHANDLE_INIT(hkey);
4187
4188 tp_features.wan = hkey_handle &&
4189 acpi_evalf(hkey_handle, &status, "GWAN", "qd");
4190
4191 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4192 "wan is %s, status 0x%02x\n",
4193 str_supported(tp_features.wan),
4194 status);
4195
4196 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4197 if (dbg_wwanemul) {
4198 tp_features.wan = 1;
4199 pr_info("wwan switch emulation enabled\n");
4200 } else
4201 #endif
4202 if (tp_features.wan &&
4203 !(status & TP_ACPI_WANCARD_HWPRESENT)) {
4204 /* no wan hardware present in system */
4205 tp_features.wan = 0;
4206 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4207 "wan hardware not installed\n");
4208 }
4209
4210 if (!tp_features.wan)
4211 return 1;
4212
4213 res = tpacpi_new_rfkill(TPACPI_RFK_WWAN_SW_ID,
4214 &wan_tprfk_ops,
4215 RFKILL_TYPE_WWAN,
4216 TPACPI_RFK_WWAN_SW_NAME,
4217 true);
4218 if (res)
4219 return res;
4220
4221 res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
4222 &wan_attr_group);
4223
4224 if (res) {
4225 tpacpi_destroy_rfkill(TPACPI_RFK_WWAN_SW_ID);
4226 return res;
4227 }
4228
4229 return 0;
4230 }
4231
4232 /* procfs -------------------------------------------------------------- */
4233 static int wan_read(struct seq_file *m)
4234 {
4235 return tpacpi_rfk_procfs_read(TPACPI_RFK_WWAN_SW_ID, m);
4236 }
4237
4238 static int wan_write(char *buf)
4239 {
4240 return tpacpi_rfk_procfs_write(TPACPI_RFK_WWAN_SW_ID, buf);
4241 }
4242
4243 static struct ibm_struct wan_driver_data = {
4244 .name = "wan",
4245 .read = wan_read,
4246 .write = wan_write,
4247 .exit = wan_exit,
4248 .shutdown = wan_shutdown,
4249 };
4250
4251 /*************************************************************************
4252 * UWB subdriver
4253 */
4254
4255 enum {
4256 /* ACPI GUWB/SUWB bits */
4257 TP_ACPI_UWB_HWPRESENT = 0x01, /* UWB hw available */
4258 TP_ACPI_UWB_RADIOSSW = 0x02, /* UWB radio enabled */
4259 };
4260
4261 #define TPACPI_RFK_UWB_SW_NAME "tpacpi_uwb_sw"
4262
4263 static int uwb_get_status(void)
4264 {
4265 int status;
4266
4267 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4268 if (dbg_uwbemul)
4269 return (tpacpi_uwb_emulstate) ?
4270 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4271 #endif
4272
4273 if (!acpi_evalf(hkey_handle, &status, "GUWB", "d"))
4274 return -EIO;
4275
4276 return ((status & TP_ACPI_UWB_RADIOSSW) != 0) ?
4277 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4278 }
4279
4280 static int uwb_set_status(enum tpacpi_rfkill_state state)
4281 {
4282 int status;
4283
4284 vdbg_printk(TPACPI_DBG_RFKILL,
4285 "will attempt to %s UWB\n",
4286 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable");
4287
4288 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4289 if (dbg_uwbemul) {
4290 tpacpi_uwb_emulstate = (state == TPACPI_RFK_RADIO_ON);
4291 return 0;
4292 }
4293 #endif
4294
4295 if (state == TPACPI_RFK_RADIO_ON)
4296 status = TP_ACPI_UWB_RADIOSSW;
4297 else
4298 status = 0;
4299
4300 if (!acpi_evalf(hkey_handle, NULL, "SUWB", "vd", status))
4301 return -EIO;
4302
4303 return 0;
4304 }
4305
4306 /* --------------------------------------------------------------------- */
4307
4308 static const struct tpacpi_rfk_ops uwb_tprfk_ops = {
4309 .get_status = uwb_get_status,
4310 .set_status = uwb_set_status,
4311 };
4312
4313 static void uwb_exit(void)
4314 {
4315 tpacpi_destroy_rfkill(TPACPI_RFK_UWB_SW_ID);
4316 }
4317
4318 static int __init uwb_init(struct ibm_init_struct *iibm)
4319 {
4320 int res;
4321 int status = 0;
4322
4323 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4324 "initializing uwb subdriver\n");
4325
4326 TPACPI_ACPIHANDLE_INIT(hkey);
4327
4328 tp_features.uwb = hkey_handle &&
4329 acpi_evalf(hkey_handle, &status, "GUWB", "qd");
4330
4331 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4332 "uwb is %s, status 0x%02x\n",
4333 str_supported(tp_features.uwb),
4334 status);
4335
4336 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4337 if (dbg_uwbemul) {
4338 tp_features.uwb = 1;
4339 pr_info("uwb switch emulation enabled\n");
4340 } else
4341 #endif
4342 if (tp_features.uwb &&
4343 !(status & TP_ACPI_UWB_HWPRESENT)) {
4344 /* no uwb hardware present in system */
4345 tp_features.uwb = 0;
4346 dbg_printk(TPACPI_DBG_INIT,
4347 "uwb hardware not installed\n");
4348 }
4349
4350 if (!tp_features.uwb)
4351 return 1;
4352
4353 res = tpacpi_new_rfkill(TPACPI_RFK_UWB_SW_ID,
4354 &uwb_tprfk_ops,
4355 RFKILL_TYPE_UWB,
4356 TPACPI_RFK_UWB_SW_NAME,
4357 false);
4358 return res;
4359 }
4360
4361 static struct ibm_struct uwb_driver_data = {
4362 .name = "uwb",
4363 .exit = uwb_exit,
4364 .flags.experimental = 1,
4365 };
4366
4367 /*************************************************************************
4368 * Video subdriver
4369 */
4370
4371 #ifdef CONFIG_THINKPAD_ACPI_VIDEO
4372
4373 enum video_access_mode {
4374 TPACPI_VIDEO_NONE = 0,
4375 TPACPI_VIDEO_570, /* 570 */
4376 TPACPI_VIDEO_770, /* 600e/x, 770e, 770x */
4377 TPACPI_VIDEO_NEW, /* all others */
4378 };
4379
4380 enum { /* video status flags, based on VIDEO_570 */
4381 TP_ACPI_VIDEO_S_LCD = 0x01, /* LCD output enabled */
4382 TP_ACPI_VIDEO_S_CRT = 0x02, /* CRT output enabled */
4383 TP_ACPI_VIDEO_S_DVI = 0x08, /* DVI output enabled */
4384 };
4385
4386 enum { /* TPACPI_VIDEO_570 constants */
4387 TP_ACPI_VIDEO_570_PHSCMD = 0x87, /* unknown magic constant :( */
4388 TP_ACPI_VIDEO_570_PHSMASK = 0x03, /* PHS bits that map to
4389 * video_status_flags */
4390 TP_ACPI_VIDEO_570_PHS2CMD = 0x8b, /* unknown magic constant :( */
4391 TP_ACPI_VIDEO_570_PHS2SET = 0x80, /* unknown magic constant :( */
4392 };
4393
4394 static enum video_access_mode video_supported;
4395 static int video_orig_autosw;
4396
4397 static int video_autosw_get(void);
4398 static int video_autosw_set(int enable);
4399
4400 TPACPI_HANDLE(vid, root,
4401 "\\_SB.PCI.AGP.VGA", /* 570 */
4402 "\\_SB.PCI0.AGP0.VID0", /* 600e/x, 770x */
4403 "\\_SB.PCI0.VID0", /* 770e */
4404 "\\_SB.PCI0.VID", /* A21e, G4x, R50e, X30, X40 */
4405 "\\_SB.PCI0.AGP.VGA", /* X100e and a few others */
4406 "\\_SB.PCI0.AGP.VID", /* all others */
4407 ); /* R30, R31 */
4408
4409 TPACPI_HANDLE(vid2, root, "\\_SB.PCI0.AGPB.VID"); /* G41 */
4410
4411 static int __init video_init(struct ibm_init_struct *iibm)
4412 {
4413 int ivga;
4414
4415 vdbg_printk(TPACPI_DBG_INIT, "initializing video subdriver\n");
4416
4417 TPACPI_ACPIHANDLE_INIT(vid);
4418 if (tpacpi_is_ibm())
4419 TPACPI_ACPIHANDLE_INIT(vid2);
4420
4421 if (vid2_handle && acpi_evalf(NULL, &ivga, "\\IVGA", "d") && ivga)
4422 /* G41, assume IVGA doesn't change */
4423 vid_handle = vid2_handle;
4424
4425 if (!vid_handle)
4426 /* video switching not supported on R30, R31 */
4427 video_supported = TPACPI_VIDEO_NONE;
4428 else if (tpacpi_is_ibm() &&
4429 acpi_evalf(vid_handle, &video_orig_autosw, "SWIT", "qd"))
4430 /* 570 */
4431 video_supported = TPACPI_VIDEO_570;
4432 else if (tpacpi_is_ibm() &&
4433 acpi_evalf(vid_handle, &video_orig_autosw, "^VADL", "qd"))
4434 /* 600e/x, 770e, 770x */
4435 video_supported = TPACPI_VIDEO_770;
4436 else
4437 /* all others */
4438 video_supported = TPACPI_VIDEO_NEW;
4439
4440 vdbg_printk(TPACPI_DBG_INIT, "video is %s, mode %d\n",
4441 str_supported(video_supported != TPACPI_VIDEO_NONE),
4442 video_supported);
4443
4444 return (video_supported != TPACPI_VIDEO_NONE)? 0 : 1;
4445 }
4446
4447 static void video_exit(void)
4448 {
4449 dbg_printk(TPACPI_DBG_EXIT,
4450 "restoring original video autoswitch mode\n");
4451 if (video_autosw_set(video_orig_autosw))
4452 pr_err("error while trying to restore original "
4453 "video autoswitch mode\n");
4454 }
4455
4456 static int video_outputsw_get(void)
4457 {
4458 int status = 0;
4459 int i;
4460
4461 switch (video_supported) {
4462 case TPACPI_VIDEO_570:
4463 if (!acpi_evalf(NULL, &i, "\\_SB.PHS", "dd",
4464 TP_ACPI_VIDEO_570_PHSCMD))
4465 return -EIO;
4466 status = i & TP_ACPI_VIDEO_570_PHSMASK;
4467 break;
4468 case TPACPI_VIDEO_770:
4469 if (!acpi_evalf(NULL, &i, "\\VCDL", "d"))
4470 return -EIO;
4471 if (i)
4472 status |= TP_ACPI_VIDEO_S_LCD;
4473 if (!acpi_evalf(NULL, &i, "\\VCDC", "d"))
4474 return -EIO;
4475 if (i)
4476 status |= TP_ACPI_VIDEO_S_CRT;
4477 break;
4478 case TPACPI_VIDEO_NEW:
4479 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 1) ||
4480 !acpi_evalf(NULL, &i, "\\VCDC", "d"))
4481 return -EIO;
4482 if (i)
4483 status |= TP_ACPI_VIDEO_S_CRT;
4484
4485 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0) ||
4486 !acpi_evalf(NULL, &i, "\\VCDL", "d"))
4487 return -EIO;
4488 if (i)
4489 status |= TP_ACPI_VIDEO_S_LCD;
4490 if (!acpi_evalf(NULL, &i, "\\VCDD", "d"))
4491 return -EIO;
4492 if (i)
4493 status |= TP_ACPI_VIDEO_S_DVI;
4494 break;
4495 default:
4496 return -ENOSYS;
4497 }
4498
4499 return status;
4500 }
4501
4502 static int video_outputsw_set(int status)
4503 {
4504 int autosw;
4505 int res = 0;
4506
4507 switch (video_supported) {
4508 case TPACPI_VIDEO_570:
4509 res = acpi_evalf(NULL, NULL,
4510 "\\_SB.PHS2", "vdd",
4511 TP_ACPI_VIDEO_570_PHS2CMD,
4512 status | TP_ACPI_VIDEO_570_PHS2SET);
4513 break;
4514 case TPACPI_VIDEO_770:
4515 autosw = video_autosw_get();
4516 if (autosw < 0)
4517 return autosw;
4518
4519 res = video_autosw_set(1);
4520 if (res)
4521 return res;
4522 res = acpi_evalf(vid_handle, NULL,
4523 "ASWT", "vdd", status * 0x100, 0);
4524 if (!autosw && video_autosw_set(autosw)) {
4525 pr_err("video auto-switch left enabled due to error\n");
4526 return -EIO;
4527 }
4528 break;
4529 case TPACPI_VIDEO_NEW:
4530 res = acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0x80) &&
4531 acpi_evalf(NULL, NULL, "\\VSDS", "vdd", status, 1);
4532 break;
4533 default:
4534 return -ENOSYS;
4535 }
4536
4537 return (res)? 0 : -EIO;
4538 }
4539
4540 static int video_autosw_get(void)
4541 {
4542 int autosw = 0;
4543
4544 switch (video_supported) {
4545 case TPACPI_VIDEO_570:
4546 if (!acpi_evalf(vid_handle, &autosw, "SWIT", "d"))
4547 return -EIO;
4548 break;
4549 case TPACPI_VIDEO_770:
4550 case TPACPI_VIDEO_NEW:
4551 if (!acpi_evalf(vid_handle, &autosw, "^VDEE", "d"))
4552 return -EIO;
4553 break;
4554 default:
4555 return -ENOSYS;
4556 }
4557
4558 return autosw & 1;
4559 }
4560
4561 static int video_autosw_set(int enable)
4562 {
4563 if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", (enable)? 1 : 0))
4564 return -EIO;
4565 return 0;
4566 }
4567
4568 static int video_outputsw_cycle(void)
4569 {
4570 int autosw = video_autosw_get();
4571 int res;
4572
4573 if (autosw < 0)
4574 return autosw;
4575
4576 switch (video_supported) {
4577 case TPACPI_VIDEO_570:
4578 res = video_autosw_set(1);
4579 if (res)
4580 return res;
4581 res = acpi_evalf(ec_handle, NULL, "_Q16", "v");
4582 break;
4583 case TPACPI_VIDEO_770:
4584 case TPACPI_VIDEO_NEW:
4585 res = video_autosw_set(1);
4586 if (res)
4587 return res;
4588 res = acpi_evalf(vid_handle, NULL, "VSWT", "v");
4589 break;
4590 default:
4591 return -ENOSYS;
4592 }
4593 if (!autosw && video_autosw_set(autosw)) {
4594 pr_err("video auto-switch left enabled due to error\n");
4595 return -EIO;
4596 }
4597
4598 return (res)? 0 : -EIO;
4599 }
4600
4601 static int video_expand_toggle(void)
4602 {
4603 switch (video_supported) {
4604 case TPACPI_VIDEO_570:
4605 return acpi_evalf(ec_handle, NULL, "_Q17", "v")?
4606 0 : -EIO;
4607 case TPACPI_VIDEO_770:
4608 return acpi_evalf(vid_handle, NULL, "VEXP", "v")?
4609 0 : -EIO;
4610 case TPACPI_VIDEO_NEW:
4611 return acpi_evalf(NULL, NULL, "\\VEXP", "v")?
4612 0 : -EIO;
4613 default:
4614 return -ENOSYS;
4615 }
4616 /* not reached */
4617 }
4618
4619 static int video_read(struct seq_file *m)
4620 {
4621 int status, autosw;
4622
4623 if (video_supported == TPACPI_VIDEO_NONE) {
4624 seq_printf(m, "status:\t\tnot supported\n");
4625 return 0;
4626 }
4627
4628 /* Even reads can crash X.org, so... */
4629 if (!capable(CAP_SYS_ADMIN))
4630 return -EPERM;
4631
4632 status = video_outputsw_get();
4633 if (status < 0)
4634 return status;
4635
4636 autosw = video_autosw_get();
4637 if (autosw < 0)
4638 return autosw;
4639
4640 seq_printf(m, "status:\t\tsupported\n");
4641 seq_printf(m, "lcd:\t\t%s\n", enabled(status, 0));
4642 seq_printf(m, "crt:\t\t%s\n", enabled(status, 1));
4643 if (video_supported == TPACPI_VIDEO_NEW)
4644 seq_printf(m, "dvi:\t\t%s\n", enabled(status, 3));
4645 seq_printf(m, "auto:\t\t%s\n", enabled(autosw, 0));
4646 seq_printf(m, "commands:\tlcd_enable, lcd_disable\n");
4647 seq_printf(m, "commands:\tcrt_enable, crt_disable\n");
4648 if (video_supported == TPACPI_VIDEO_NEW)
4649 seq_printf(m, "commands:\tdvi_enable, dvi_disable\n");
4650 seq_printf(m, "commands:\tauto_enable, auto_disable\n");
4651 seq_printf(m, "commands:\tvideo_switch, expand_toggle\n");
4652
4653 return 0;
4654 }
4655
4656 static int video_write(char *buf)
4657 {
4658 char *cmd;
4659 int enable, disable, status;
4660 int res;
4661
4662 if (video_supported == TPACPI_VIDEO_NONE)
4663 return -ENODEV;
4664
4665 /* Even reads can crash X.org, let alone writes... */
4666 if (!capable(CAP_SYS_ADMIN))
4667 return -EPERM;
4668
4669 enable = 0;
4670 disable = 0;
4671
4672 while ((cmd = next_cmd(&buf))) {
4673 if (strlencmp(cmd, "lcd_enable") == 0) {
4674 enable |= TP_ACPI_VIDEO_S_LCD;
4675 } else if (strlencmp(cmd, "lcd_disable") == 0) {
4676 disable |= TP_ACPI_VIDEO_S_LCD;
4677 } else if (strlencmp(cmd, "crt_enable") == 0) {
4678 enable |= TP_ACPI_VIDEO_S_CRT;
4679 } else if (strlencmp(cmd, "crt_disable") == 0) {
4680 disable |= TP_ACPI_VIDEO_S_CRT;
4681 } else if (video_supported == TPACPI_VIDEO_NEW &&
4682 strlencmp(cmd, "dvi_enable") == 0) {
4683 enable |= TP_ACPI_VIDEO_S_DVI;
4684 } else if (video_supported == TPACPI_VIDEO_NEW &&
4685 strlencmp(cmd, "dvi_disable") == 0) {
4686 disable |= TP_ACPI_VIDEO_S_DVI;
4687 } else if (strlencmp(cmd, "auto_enable") == 0) {
4688 res = video_autosw_set(1);
4689 if (res)
4690 return res;
4691 } else if (strlencmp(cmd, "auto_disable") == 0) {
4692 res = video_autosw_set(0);
4693 if (res)
4694 return res;
4695 } else if (strlencmp(cmd, "video_switch") == 0) {
4696 res = video_outputsw_cycle();
4697 if (res)
4698 return res;
4699 } else if (strlencmp(cmd, "expand_toggle") == 0) {
4700 res = video_expand_toggle();
4701 if (res)
4702 return res;
4703 } else
4704 return -EINVAL;
4705 }
4706
4707 if (enable || disable) {
4708 status = video_outputsw_get();
4709 if (status < 0)
4710 return status;
4711 res = video_outputsw_set((status & ~disable) | enable);
4712 if (res)
4713 return res;
4714 }
4715
4716 return 0;
4717 }
4718
4719 static struct ibm_struct video_driver_data = {
4720 .name = "video",
4721 .read = video_read,
4722 .write = video_write,
4723 .exit = video_exit,
4724 };
4725
4726 #endif /* CONFIG_THINKPAD_ACPI_VIDEO */
4727
4728 /*************************************************************************
4729 * Light (thinklight) subdriver
4730 */
4731
4732 TPACPI_HANDLE(lght, root, "\\LGHT"); /* A21e, A2xm/p, T20-22, X20-21 */
4733 TPACPI_HANDLE(ledb, ec, "LEDB"); /* G4x */
4734
4735 static int light_get_status(void)
4736 {
4737 int status = 0;
4738
4739 if (tp_features.light_status) {
4740 if (!acpi_evalf(ec_handle, &status, "KBLT", "d"))
4741 return -EIO;
4742 return (!!status);
4743 }
4744
4745 return -ENXIO;
4746 }
4747
4748 static int light_set_status(int status)
4749 {
4750 int rc;
4751
4752 if (tp_features.light) {
4753 if (cmos_handle) {
4754 rc = acpi_evalf(cmos_handle, NULL, NULL, "vd",
4755 (status)?
4756 TP_CMOS_THINKLIGHT_ON :
4757 TP_CMOS_THINKLIGHT_OFF);
4758 } else {
4759 rc = acpi_evalf(lght_handle, NULL, NULL, "vd",
4760 (status)? 1 : 0);
4761 }
4762 return (rc)? 0 : -EIO;
4763 }
4764
4765 return -ENXIO;
4766 }
4767
4768 static void light_set_status_worker(struct work_struct *work)
4769 {
4770 struct tpacpi_led_classdev *data =
4771 container_of(work, struct tpacpi_led_classdev, work);
4772
4773 if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING))
4774 light_set_status((data->new_state != TPACPI_LED_OFF));
4775 }
4776
4777 static void light_sysfs_set(struct led_classdev *led_cdev,
4778 enum led_brightness brightness)
4779 {
4780 struct tpacpi_led_classdev *data =
4781 container_of(led_cdev,
4782 struct tpacpi_led_classdev,
4783 led_classdev);
4784 data->new_state = (brightness != LED_OFF) ?
4785 TPACPI_LED_ON : TPACPI_LED_OFF;
4786 queue_work(tpacpi_wq, &data->work);
4787 }
4788
4789 static enum led_brightness light_sysfs_get(struct led_classdev *led_cdev)
4790 {
4791 return (light_get_status() == 1)? LED_FULL : LED_OFF;
4792 }
4793
4794 static struct tpacpi_led_classdev tpacpi_led_thinklight = {
4795 .led_classdev = {
4796 .name = "tpacpi::thinklight",
4797 .brightness_set = &light_sysfs_set,
4798 .brightness_get = &light_sysfs_get,
4799 }
4800 };
4801
4802 static int __init light_init(struct ibm_init_struct *iibm)
4803 {
4804 int rc;
4805
4806 vdbg_printk(TPACPI_DBG_INIT, "initializing light subdriver\n");
4807
4808 if (tpacpi_is_ibm()) {
4809 TPACPI_ACPIHANDLE_INIT(ledb);
4810 TPACPI_ACPIHANDLE_INIT(lght);
4811 }
4812 TPACPI_ACPIHANDLE_INIT(cmos);
4813 INIT_WORK(&tpacpi_led_thinklight.work, light_set_status_worker);
4814
4815 /* light not supported on 570, 600e/x, 770e, 770x, G4x, R30, R31 */
4816 tp_features.light = (cmos_handle || lght_handle) && !ledb_handle;
4817
4818 if (tp_features.light)
4819 /* light status not supported on
4820 570, 600e/x, 770e, 770x, G4x, R30, R31, R32, X20 */
4821 tp_features.light_status =
4822 acpi_evalf(ec_handle, NULL, "KBLT", "qv");
4823
4824 vdbg_printk(TPACPI_DBG_INIT, "light is %s, light status is %s\n",
4825 str_supported(tp_features.light),
4826 str_supported(tp_features.light_status));
4827
4828 if (!tp_features.light)
4829 return 1;
4830
4831 rc = led_classdev_register(&tpacpi_pdev->dev,
4832 &tpacpi_led_thinklight.led_classdev);
4833
4834 if (rc < 0) {
4835 tp_features.light = 0;
4836 tp_features.light_status = 0;
4837 } else {
4838 rc = 0;
4839 }
4840
4841 return rc;
4842 }
4843
4844 static void light_exit(void)
4845 {
4846 led_classdev_unregister(&tpacpi_led_thinklight.led_classdev);
4847 flush_workqueue(tpacpi_wq);
4848 }
4849
4850 static int light_read(struct seq_file *m)
4851 {
4852 int status;
4853
4854 if (!tp_features.light) {
4855 seq_printf(m, "status:\t\tnot supported\n");
4856 } else if (!tp_features.light_status) {
4857 seq_printf(m, "status:\t\tunknown\n");
4858 seq_printf(m, "commands:\ton, off\n");
4859 } else {
4860 status = light_get_status();
4861 if (status < 0)
4862 return status;
4863 seq_printf(m, "status:\t\t%s\n", onoff(status, 0));
4864 seq_printf(m, "commands:\ton, off\n");
4865 }
4866
4867 return 0;
4868 }
4869
4870 static int light_write(char *buf)
4871 {
4872 char *cmd;
4873 int newstatus = 0;
4874
4875 if (!tp_features.light)
4876 return -ENODEV;
4877
4878 while ((cmd = next_cmd(&buf))) {
4879 if (strlencmp(cmd, "on") == 0) {
4880 newstatus = 1;
4881 } else if (strlencmp(cmd, "off") == 0) {
4882 newstatus = 0;
4883 } else
4884 return -EINVAL;
4885 }
4886
4887 return light_set_status(newstatus);
4888 }
4889
4890 static struct ibm_struct light_driver_data = {
4891 .name = "light",
4892 .read = light_read,
4893 .write = light_write,
4894 .exit = light_exit,
4895 };
4896
4897 /*************************************************************************
4898 * CMOS subdriver
4899 */
4900
4901 /* sysfs cmos_command -------------------------------------------------- */
4902 static ssize_t cmos_command_store(struct device *dev,
4903 struct device_attribute *attr,
4904 const char *buf, size_t count)
4905 {
4906 unsigned long cmos_cmd;
4907 int res;
4908
4909 if (parse_strtoul(buf, 21, &cmos_cmd))
4910 return -EINVAL;
4911
4912 res = issue_thinkpad_cmos_command(cmos_cmd);
4913 return (res)? res : count;
4914 }
4915
4916 static struct device_attribute dev_attr_cmos_command =
4917 __ATTR(cmos_command, S_IWUSR, NULL, cmos_command_store);
4918
4919 /* --------------------------------------------------------------------- */
4920
4921 static int __init cmos_init(struct ibm_init_struct *iibm)
4922 {
4923 int res;
4924
4925 vdbg_printk(TPACPI_DBG_INIT,
4926 "initializing cmos commands subdriver\n");
4927
4928 TPACPI_ACPIHANDLE_INIT(cmos);
4929
4930 vdbg_printk(TPACPI_DBG_INIT, "cmos commands are %s\n",
4931 str_supported(cmos_handle != NULL));
4932
4933 res = device_create_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
4934 if (res)
4935 return res;
4936
4937 return (cmos_handle)? 0 : 1;
4938 }
4939
4940 static void cmos_exit(void)
4941 {
4942 device_remove_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
4943 }
4944
4945 static int cmos_read(struct seq_file *m)
4946 {
4947 /* cmos not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
4948 R30, R31, T20-22, X20-21 */
4949 if (!cmos_handle)
4950 seq_printf(m, "status:\t\tnot supported\n");
4951 else {
4952 seq_printf(m, "status:\t\tsupported\n");
4953 seq_printf(m, "commands:\t<cmd> (<cmd> is 0-21)\n");
4954 }
4955
4956 return 0;
4957 }
4958
4959 static int cmos_write(char *buf)
4960 {
4961 char *cmd;
4962 int cmos_cmd, res;
4963
4964 while ((cmd = next_cmd(&buf))) {
4965 if (sscanf(cmd, "%u", &cmos_cmd) == 1 &&
4966 cmos_cmd >= 0 && cmos_cmd <= 21) {
4967 /* cmos_cmd set */
4968 } else
4969 return -EINVAL;
4970
4971 res = issue_thinkpad_cmos_command(cmos_cmd);
4972 if (res)
4973 return res;
4974 }
4975
4976 return 0;
4977 }
4978
4979 static struct ibm_struct cmos_driver_data = {
4980 .name = "cmos",
4981 .read = cmos_read,
4982 .write = cmos_write,
4983 .exit = cmos_exit,
4984 };
4985
4986 /*************************************************************************
4987 * LED subdriver
4988 */
4989
4990 enum led_access_mode {
4991 TPACPI_LED_NONE = 0,
4992 TPACPI_LED_570, /* 570 */
4993 TPACPI_LED_OLD, /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
4994 TPACPI_LED_NEW, /* all others */
4995 };
4996
4997 enum { /* For TPACPI_LED_OLD */
4998 TPACPI_LED_EC_HLCL = 0x0c, /* EC reg to get led to power on */
4999 TPACPI_LED_EC_HLBL = 0x0d, /* EC reg to blink a lit led */
5000 TPACPI_LED_EC_HLMS = 0x0e, /* EC reg to select led to command */
5001 };
5002
5003 static enum led_access_mode led_supported;
5004
5005 static acpi_handle led_handle;
5006
5007 #define TPACPI_LED_NUMLEDS 16
5008 static struct tpacpi_led_classdev *tpacpi_leds;
5009 static enum led_status_t tpacpi_led_state_cache[TPACPI_LED_NUMLEDS];
5010 static const char * const tpacpi_led_names[TPACPI_LED_NUMLEDS] = {
5011 /* there's a limit of 19 chars + NULL before 2.6.26 */
5012 "tpacpi::power",
5013 "tpacpi:orange:batt",
5014 "tpacpi:green:batt",
5015 "tpacpi::dock_active",
5016 "tpacpi::bay_active",
5017 "tpacpi::dock_batt",
5018 "tpacpi::unknown_led",
5019 "tpacpi::standby",
5020 "tpacpi::dock_status1",
5021 "tpacpi::dock_status2",
5022 "tpacpi::unknown_led2",
5023 "tpacpi::unknown_led3",
5024 "tpacpi::thinkvantage",
5025 };
5026 #define TPACPI_SAFE_LEDS 0x1081U
5027
5028 static inline bool tpacpi_is_led_restricted(const unsigned int led)
5029 {
5030 #ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS
5031 return false;
5032 #else
5033 return (1U & (TPACPI_SAFE_LEDS >> led)) == 0;
5034 #endif
5035 }
5036
5037 static int led_get_status(const unsigned int led)
5038 {
5039 int status;
5040 enum led_status_t led_s;
5041
5042 switch (led_supported) {
5043 case TPACPI_LED_570:
5044 if (!acpi_evalf(ec_handle,
5045 &status, "GLED", "dd", 1 << led))
5046 return -EIO;
5047 led_s = (status == 0)?
5048 TPACPI_LED_OFF :
5049 ((status == 1)?
5050 TPACPI_LED_ON :
5051 TPACPI_LED_BLINK);
5052 tpacpi_led_state_cache[led] = led_s;
5053 return led_s;
5054 default:
5055 return -ENXIO;
5056 }
5057
5058 /* not reached */
5059 }
5060
5061 static int led_set_status(const unsigned int led,
5062 const enum led_status_t ledstatus)
5063 {
5064 /* off, on, blink. Index is led_status_t */
5065 static const unsigned int led_sled_arg1[] = { 0, 1, 3 };
5066 static const unsigned int led_led_arg1[] = { 0, 0x80, 0xc0 };
5067
5068 int rc = 0;
5069
5070 switch (led_supported) {
5071 case TPACPI_LED_570:
5072 /* 570 */
5073 if (unlikely(led > 7))
5074 return -EINVAL;
5075 if (unlikely(tpacpi_is_led_restricted(led)))
5076 return -EPERM;
5077 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
5078 (1 << led), led_sled_arg1[ledstatus]))
5079 rc = -EIO;
5080 break;
5081 case TPACPI_LED_OLD:
5082 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */
5083 if (unlikely(led > 7))
5084 return -EINVAL;
5085 if (unlikely(tpacpi_is_led_restricted(led)))
5086 return -EPERM;
5087 rc = ec_write(TPACPI_LED_EC_HLMS, (1 << led));
5088 if (rc >= 0)
5089 rc = ec_write(TPACPI_LED_EC_HLBL,
5090 (ledstatus == TPACPI_LED_BLINK) << led);
5091 if (rc >= 0)
5092 rc = ec_write(TPACPI_LED_EC_HLCL,
5093 (ledstatus != TPACPI_LED_OFF) << led);
5094 break;
5095 case TPACPI_LED_NEW:
5096 /* all others */
5097 if (unlikely(led >= TPACPI_LED_NUMLEDS))
5098 return -EINVAL;
5099 if (unlikely(tpacpi_is_led_restricted(led)))
5100 return -EPERM;
5101 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
5102 led, led_led_arg1[ledstatus]))
5103 rc = -EIO;
5104 break;
5105 default:
5106 rc = -ENXIO;
5107 }
5108
5109 if (!rc)
5110 tpacpi_led_state_cache[led] = ledstatus;
5111
5112 return rc;
5113 }
5114
5115 static void led_set_status_worker(struct work_struct *work)
5116 {
5117 struct tpacpi_led_classdev *data =
5118 container_of(work, struct tpacpi_led_classdev, work);
5119
5120 if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING))
5121 led_set_status(data->led, data->new_state);
5122 }
5123
5124 static void led_sysfs_set(struct led_classdev *led_cdev,
5125 enum led_brightness brightness)
5126 {
5127 struct tpacpi_led_classdev *data = container_of(led_cdev,
5128 struct tpacpi_led_classdev, led_classdev);
5129
5130 if (brightness == LED_OFF)
5131 data->new_state = TPACPI_LED_OFF;
5132 else if (tpacpi_led_state_cache[data->led] != TPACPI_LED_BLINK)
5133 data->new_state = TPACPI_LED_ON;
5134 else
5135 data->new_state = TPACPI_LED_BLINK;
5136
5137 queue_work(tpacpi_wq, &data->work);
5138 }
5139
5140 static int led_sysfs_blink_set(struct led_classdev *led_cdev,
5141 unsigned long *delay_on, unsigned long *delay_off)
5142 {
5143 struct tpacpi_led_classdev *data = container_of(led_cdev,
5144 struct tpacpi_led_classdev, led_classdev);
5145
5146 /* Can we choose the flash rate? */
5147 if (*delay_on == 0 && *delay_off == 0) {
5148 /* yes. set them to the hardware blink rate (1 Hz) */
5149 *delay_on = 500; /* ms */
5150 *delay_off = 500; /* ms */
5151 } else if ((*delay_on != 500) || (*delay_off != 500))
5152 return -EINVAL;
5153
5154 data->new_state = TPACPI_LED_BLINK;
5155 queue_work(tpacpi_wq, &data->work);
5156
5157 return 0;
5158 }
5159
5160 static enum led_brightness led_sysfs_get(struct led_classdev *led_cdev)
5161 {
5162 int rc;
5163
5164 struct tpacpi_led_classdev *data = container_of(led_cdev,
5165 struct tpacpi_led_classdev, led_classdev);
5166
5167 rc = led_get_status(data->led);
5168
5169 if (rc == TPACPI_LED_OFF || rc < 0)
5170 rc = LED_OFF; /* no error handling in led class :( */
5171 else
5172 rc = LED_FULL;
5173
5174 return rc;
5175 }
5176
5177 static void led_exit(void)
5178 {
5179 unsigned int i;
5180
5181 for (i = 0; i < TPACPI_LED_NUMLEDS; i++) {
5182 if (tpacpi_leds[i].led_classdev.name)
5183 led_classdev_unregister(&tpacpi_leds[i].led_classdev);
5184 }
5185
5186 flush_workqueue(tpacpi_wq);
5187 kfree(tpacpi_leds);
5188 }
5189
5190 static int __init tpacpi_init_led(unsigned int led)
5191 {
5192 int rc;
5193
5194 tpacpi_leds[led].led = led;
5195
5196 /* LEDs with no name don't get registered */
5197 if (!tpacpi_led_names[led])
5198 return 0;
5199
5200 tpacpi_leds[led].led_classdev.brightness_set = &led_sysfs_set;
5201 tpacpi_leds[led].led_classdev.blink_set = &led_sysfs_blink_set;
5202 if (led_supported == TPACPI_LED_570)
5203 tpacpi_leds[led].led_classdev.brightness_get =
5204 &led_sysfs_get;
5205
5206 tpacpi_leds[led].led_classdev.name = tpacpi_led_names[led];
5207
5208 INIT_WORK(&tpacpi_leds[led].work, led_set_status_worker);
5209
5210 rc = led_classdev_register(&tpacpi_pdev->dev,
5211 &tpacpi_leds[led].led_classdev);
5212 if (rc < 0)
5213 tpacpi_leds[led].led_classdev.name = NULL;
5214
5215 return rc;
5216 }
5217
5218 static const struct tpacpi_quirk led_useful_qtable[] __initconst = {
5219 TPACPI_Q_IBM('1', 'E', 0x009f), /* A30 */
5220 TPACPI_Q_IBM('1', 'N', 0x009f), /* A31 */
5221 TPACPI_Q_IBM('1', 'G', 0x009f), /* A31 */
5222
5223 TPACPI_Q_IBM('1', 'I', 0x0097), /* T30 */
5224 TPACPI_Q_IBM('1', 'R', 0x0097), /* T40, T41, T42, R50, R51 */
5225 TPACPI_Q_IBM('7', '0', 0x0097), /* T43, R52 */
5226 TPACPI_Q_IBM('1', 'Y', 0x0097), /* T43 */
5227 TPACPI_Q_IBM('1', 'W', 0x0097), /* R50e */
5228 TPACPI_Q_IBM('1', 'V', 0x0097), /* R51 */
5229 TPACPI_Q_IBM('7', '8', 0x0097), /* R51e */
5230 TPACPI_Q_IBM('7', '6', 0x0097), /* R52 */
5231
5232 TPACPI_Q_IBM('1', 'K', 0x00bf), /* X30 */
5233 TPACPI_Q_IBM('1', 'Q', 0x00bf), /* X31, X32 */
5234 TPACPI_Q_IBM('1', 'U', 0x00bf), /* X40 */
5235 TPACPI_Q_IBM('7', '4', 0x00bf), /* X41 */
5236 TPACPI_Q_IBM('7', '5', 0x00bf), /* X41t */
5237
5238 TPACPI_Q_IBM('7', '9', 0x1f97), /* T60 (1) */
5239 TPACPI_Q_IBM('7', '7', 0x1f97), /* Z60* (1) */
5240 TPACPI_Q_IBM('7', 'F', 0x1f97), /* Z61* (1) */
5241 TPACPI_Q_IBM('7', 'B', 0x1fb7), /* X60 (1) */
5242
5243 /* (1) - may have excess leds enabled on MSB */
5244
5245 /* Defaults (order matters, keep last, don't reorder!) */
5246 { /* Lenovo */
5247 .vendor = PCI_VENDOR_ID_LENOVO,
5248 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY,
5249 .quirks = 0x1fffU,
5250 },
5251 { /* IBM ThinkPads with no EC version string */
5252 .vendor = PCI_VENDOR_ID_IBM,
5253 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_UNKNOWN,
5254 .quirks = 0x00ffU,
5255 },
5256 { /* IBM ThinkPads with EC version string */
5257 .vendor = PCI_VENDOR_ID_IBM,
5258 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY,
5259 .quirks = 0x00bfU,
5260 },
5261 };
5262
5263 #undef TPACPI_LEDQ_IBM
5264 #undef TPACPI_LEDQ_LNV
5265
5266 static enum led_access_mode __init led_init_detect_mode(void)
5267 {
5268 acpi_status status;
5269
5270 if (tpacpi_is_ibm()) {
5271 /* 570 */
5272 status = acpi_get_handle(ec_handle, "SLED", &led_handle);
5273 if (ACPI_SUCCESS(status))
5274 return TPACPI_LED_570;
5275
5276 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
5277 status = acpi_get_handle(ec_handle, "SYSL", &led_handle);
5278 if (ACPI_SUCCESS(status))
5279 return TPACPI_LED_OLD;
5280 }
5281
5282 /* most others */
5283 status = acpi_get_handle(ec_handle, "LED", &led_handle);
5284 if (ACPI_SUCCESS(status))
5285 return TPACPI_LED_NEW;
5286
5287 /* R30, R31, and unknown firmwares */
5288 led_handle = NULL;
5289 return TPACPI_LED_NONE;
5290 }
5291
5292 static int __init led_init(struct ibm_init_struct *iibm)
5293 {
5294 unsigned int i;
5295 int rc;
5296 unsigned long useful_leds;
5297
5298 vdbg_printk(TPACPI_DBG_INIT, "initializing LED subdriver\n");
5299
5300 led_supported = led_init_detect_mode();
5301
5302 if (led_supported != TPACPI_LED_NONE) {
5303 useful_leds = tpacpi_check_quirks(led_useful_qtable,
5304 ARRAY_SIZE(led_useful_qtable));
5305
5306 if (!useful_leds) {
5307 led_handle = NULL;
5308 led_supported = TPACPI_LED_NONE;
5309 }
5310 }
5311
5312 vdbg_printk(TPACPI_DBG_INIT, "LED commands are %s, mode %d\n",
5313 str_supported(led_supported), led_supported);
5314
5315 if (led_supported == TPACPI_LED_NONE)
5316 return 1;
5317
5318 tpacpi_leds = kzalloc(sizeof(*tpacpi_leds) * TPACPI_LED_NUMLEDS,
5319 GFP_KERNEL);
5320 if (!tpacpi_leds) {
5321 pr_err("Out of memory for LED data\n");
5322 return -ENOMEM;
5323 }
5324
5325 for (i = 0; i < TPACPI_LED_NUMLEDS; i++) {
5326 tpacpi_leds[i].led = -1;
5327
5328 if (!tpacpi_is_led_restricted(i) &&
5329 test_bit(i, &useful_leds)) {
5330 rc = tpacpi_init_led(i);
5331 if (rc < 0) {
5332 led_exit();
5333 return rc;
5334 }
5335 }
5336 }
5337
5338 #ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS
5339 pr_notice("warning: userspace override of important "
5340 "firmware LEDs is enabled\n");
5341 #endif
5342 return 0;
5343 }
5344
5345 #define str_led_status(s) \
5346 ((s) == TPACPI_LED_OFF ? "off" : \
5347 ((s) == TPACPI_LED_ON ? "on" : "blinking"))
5348
5349 static int led_read(struct seq_file *m)
5350 {
5351 if (!led_supported) {
5352 seq_printf(m, "status:\t\tnot supported\n");
5353 return 0;
5354 }
5355 seq_printf(m, "status:\t\tsupported\n");
5356
5357 if (led_supported == TPACPI_LED_570) {
5358 /* 570 */
5359 int i, status;
5360 for (i = 0; i < 8; i++) {
5361 status = led_get_status(i);
5362 if (status < 0)
5363 return -EIO;
5364 seq_printf(m, "%d:\t\t%s\n",
5365 i, str_led_status(status));
5366 }
5367 }
5368
5369 seq_printf(m, "commands:\t"
5370 "<led> on, <led> off, <led> blink (<led> is 0-15)\n");
5371
5372 return 0;
5373 }
5374
5375 static int led_write(char *buf)
5376 {
5377 char *cmd;
5378 int led, rc;
5379 enum led_status_t s;
5380
5381 if (!led_supported)
5382 return -ENODEV;
5383
5384 while ((cmd = next_cmd(&buf))) {
5385 if (sscanf(cmd, "%d", &led) != 1)
5386 return -EINVAL;
5387
5388 if (led < 0 || led > (TPACPI_LED_NUMLEDS - 1) ||
5389 tpacpi_leds[led].led < 0)
5390 return -ENODEV;
5391
5392 if (strstr(cmd, "off")) {
5393 s = TPACPI_LED_OFF;
5394 } else if (strstr(cmd, "on")) {
5395 s = TPACPI_LED_ON;
5396 } else if (strstr(cmd, "blink")) {
5397 s = TPACPI_LED_BLINK;
5398 } else {
5399 return -EINVAL;
5400 }
5401
5402 rc = led_set_status(led, s);
5403 if (rc < 0)
5404 return rc;
5405 }
5406
5407 return 0;
5408 }
5409
5410 static struct ibm_struct led_driver_data = {
5411 .name = "led",
5412 .read = led_read,
5413 .write = led_write,
5414 .exit = led_exit,
5415 };
5416
5417 /*************************************************************************
5418 * Beep subdriver
5419 */
5420
5421 TPACPI_HANDLE(beep, ec, "BEEP"); /* all except R30, R31 */
5422
5423 #define TPACPI_BEEP_Q1 0x0001
5424
5425 static const struct tpacpi_quirk beep_quirk_table[] __initconst = {
5426 TPACPI_Q_IBM('I', 'M', TPACPI_BEEP_Q1), /* 570 */
5427 TPACPI_Q_IBM('I', 'U', TPACPI_BEEP_Q1), /* 570E - unverified */
5428 };
5429
5430 static int __init beep_init(struct ibm_init_struct *iibm)
5431 {
5432 unsigned long quirks;
5433
5434 vdbg_printk(TPACPI_DBG_INIT, "initializing beep subdriver\n");
5435
5436 TPACPI_ACPIHANDLE_INIT(beep);
5437
5438 vdbg_printk(TPACPI_DBG_INIT, "beep is %s\n",
5439 str_supported(beep_handle != NULL));
5440
5441 quirks = tpacpi_check_quirks(beep_quirk_table,
5442 ARRAY_SIZE(beep_quirk_table));
5443
5444 tp_features.beep_needs_two_args = !!(quirks & TPACPI_BEEP_Q1);
5445
5446 return (beep_handle)? 0 : 1;
5447 }
5448
5449 static int beep_read(struct seq_file *m)
5450 {
5451 if (!beep_handle)
5452 seq_printf(m, "status:\t\tnot supported\n");
5453 else {
5454 seq_printf(m, "status:\t\tsupported\n");
5455 seq_printf(m, "commands:\t<cmd> (<cmd> is 0-17)\n");
5456 }
5457
5458 return 0;
5459 }
5460
5461 static int beep_write(char *buf)
5462 {
5463 char *cmd;
5464 int beep_cmd;
5465
5466 if (!beep_handle)
5467 return -ENODEV;
5468
5469 while ((cmd = next_cmd(&buf))) {
5470 if (sscanf(cmd, "%u", &beep_cmd) == 1 &&
5471 beep_cmd >= 0 && beep_cmd <= 17) {
5472 /* beep_cmd set */
5473 } else
5474 return -EINVAL;
5475 if (tp_features.beep_needs_two_args) {
5476 if (!acpi_evalf(beep_handle, NULL, NULL, "vdd",
5477 beep_cmd, 0))
5478 return -EIO;
5479 } else {
5480 if (!acpi_evalf(beep_handle, NULL, NULL, "vd",
5481 beep_cmd))
5482 return -EIO;
5483 }
5484 }
5485
5486 return 0;
5487 }
5488
5489 static struct ibm_struct beep_driver_data = {
5490 .name = "beep",
5491 .read = beep_read,
5492 .write = beep_write,
5493 };
5494
5495 /*************************************************************************
5496 * Thermal subdriver
5497 */
5498
5499 enum thermal_access_mode {
5500 TPACPI_THERMAL_NONE = 0, /* No thermal support */
5501 TPACPI_THERMAL_ACPI_TMP07, /* Use ACPI TMP0-7 */
5502 TPACPI_THERMAL_ACPI_UPDT, /* Use ACPI TMP0-7 with UPDT */
5503 TPACPI_THERMAL_TPEC_8, /* Use ACPI EC regs, 8 sensors */
5504 TPACPI_THERMAL_TPEC_16, /* Use ACPI EC regs, 16 sensors */
5505 };
5506
5507 enum { /* TPACPI_THERMAL_TPEC_* */
5508 TP_EC_THERMAL_TMP0 = 0x78, /* ACPI EC regs TMP 0..7 */
5509 TP_EC_THERMAL_TMP8 = 0xC0, /* ACPI EC regs TMP 8..15 */
5510 TP_EC_THERMAL_TMP_NA = -128, /* ACPI EC sensor not available */
5511
5512 TPACPI_THERMAL_SENSOR_NA = -128000, /* Sensor not available */
5513 };
5514
5515
5516 #define TPACPI_MAX_THERMAL_SENSORS 16 /* Max thermal sensors supported */
5517 struct ibm_thermal_sensors_struct {
5518 s32 temp[TPACPI_MAX_THERMAL_SENSORS];
5519 };
5520
5521 static enum thermal_access_mode thermal_read_mode;
5522
5523 /* idx is zero-based */
5524 static int thermal_get_sensor(int idx, s32 *value)
5525 {
5526 int t;
5527 s8 tmp;
5528 char tmpi[5];
5529
5530 t = TP_EC_THERMAL_TMP0;
5531
5532 switch (thermal_read_mode) {
5533 #if TPACPI_MAX_THERMAL_SENSORS >= 16
5534 case TPACPI_THERMAL_TPEC_16:
5535 if (idx >= 8 && idx <= 15) {
5536 t = TP_EC_THERMAL_TMP8;
5537 idx -= 8;
5538 }
5539 /* fallthrough */
5540 #endif
5541 case TPACPI_THERMAL_TPEC_8:
5542 if (idx <= 7) {
5543 if (!acpi_ec_read(t + idx, &tmp))
5544 return -EIO;
5545 *value = tmp * 1000;
5546 return 0;
5547 }
5548 break;
5549
5550 case TPACPI_THERMAL_ACPI_UPDT:
5551 if (idx <= 7) {
5552 snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
5553 if (!acpi_evalf(ec_handle, NULL, "UPDT", "v"))
5554 return -EIO;
5555 if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
5556 return -EIO;
5557 *value = (t - 2732) * 100;
5558 return 0;
5559 }
5560 break;
5561
5562 case TPACPI_THERMAL_ACPI_TMP07:
5563 if (idx <= 7) {
5564 snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
5565 if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
5566 return -EIO;
5567 if (t > 127 || t < -127)
5568 t = TP_EC_THERMAL_TMP_NA;
5569 *value = t * 1000;
5570 return 0;
5571 }
5572 break;
5573
5574 case TPACPI_THERMAL_NONE:
5575 default:
5576 return -ENOSYS;
5577 }
5578
5579 return -EINVAL;
5580 }
5581
5582 static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s)
5583 {
5584 int res, i;
5585 int n;
5586
5587 n = 8;
5588 i = 0;
5589
5590 if (!s)
5591 return -EINVAL;
5592
5593 if (thermal_read_mode == TPACPI_THERMAL_TPEC_16)
5594 n = 16;
5595
5596 for (i = 0 ; i < n; i++) {
5597 res = thermal_get_sensor(i, &s->temp[i]);
5598 if (res)
5599 return res;
5600 }
5601
5602 return n;
5603 }
5604
5605 static void thermal_dump_all_sensors(void)
5606 {
5607 int n, i;
5608 struct ibm_thermal_sensors_struct t;
5609
5610 n = thermal_get_sensors(&t);
5611 if (n <= 0)
5612 return;
5613
5614 pr_notice("temperatures (Celsius):");
5615
5616 for (i = 0; i < n; i++) {
5617 if (t.temp[i] != TPACPI_THERMAL_SENSOR_NA)
5618 pr_cont(" %d", (int)(t.temp[i] / 1000));
5619 else
5620 pr_cont(" N/A");
5621 }
5622
5623 pr_cont("\n");
5624 }
5625
5626 /* sysfs temp##_input -------------------------------------------------- */
5627
5628 static ssize_t thermal_temp_input_show(struct device *dev,
5629 struct device_attribute *attr,
5630 char *buf)
5631 {
5632 struct sensor_device_attribute *sensor_attr =
5633 to_sensor_dev_attr(attr);
5634 int idx = sensor_attr->index;
5635 s32 value;
5636 int res;
5637
5638 res = thermal_get_sensor(idx, &value);
5639 if (res)
5640 return res;
5641 if (value == TPACPI_THERMAL_SENSOR_NA)
5642 return -ENXIO;
5643
5644 return snprintf(buf, PAGE_SIZE, "%d\n", value);
5645 }
5646
5647 #define THERMAL_SENSOR_ATTR_TEMP(_idxA, _idxB) \
5648 SENSOR_ATTR(temp##_idxA##_input, S_IRUGO, \
5649 thermal_temp_input_show, NULL, _idxB)
5650
5651 static struct sensor_device_attribute sensor_dev_attr_thermal_temp_input[] = {
5652 THERMAL_SENSOR_ATTR_TEMP(1, 0),
5653 THERMAL_SENSOR_ATTR_TEMP(2, 1),
5654 THERMAL_SENSOR_ATTR_TEMP(3, 2),
5655 THERMAL_SENSOR_ATTR_TEMP(4, 3),
5656 THERMAL_SENSOR_ATTR_TEMP(5, 4),
5657 THERMAL_SENSOR_ATTR_TEMP(6, 5),
5658 THERMAL_SENSOR_ATTR_TEMP(7, 6),
5659 THERMAL_SENSOR_ATTR_TEMP(8, 7),
5660 THERMAL_SENSOR_ATTR_TEMP(9, 8),
5661 THERMAL_SENSOR_ATTR_TEMP(10, 9),
5662 THERMAL_SENSOR_ATTR_TEMP(11, 10),
5663 THERMAL_SENSOR_ATTR_TEMP(12, 11),
5664 THERMAL_SENSOR_ATTR_TEMP(13, 12),
5665 THERMAL_SENSOR_ATTR_TEMP(14, 13),
5666 THERMAL_SENSOR_ATTR_TEMP(15, 14),
5667 THERMAL_SENSOR_ATTR_TEMP(16, 15),
5668 };
5669
5670 #define THERMAL_ATTRS(X) \
5671 &sensor_dev_attr_thermal_temp_input[X].dev_attr.attr
5672
5673 static struct attribute *thermal_temp_input_attr[] = {
5674 THERMAL_ATTRS(8),
5675 THERMAL_ATTRS(9),
5676 THERMAL_ATTRS(10),
5677 THERMAL_ATTRS(11),
5678 THERMAL_ATTRS(12),
5679 THERMAL_ATTRS(13),
5680 THERMAL_ATTRS(14),
5681 THERMAL_ATTRS(15),
5682 THERMAL_ATTRS(0),
5683 THERMAL_ATTRS(1),
5684 THERMAL_ATTRS(2),
5685 THERMAL_ATTRS(3),
5686 THERMAL_ATTRS(4),
5687 THERMAL_ATTRS(5),
5688 THERMAL_ATTRS(6),
5689 THERMAL_ATTRS(7),
5690 NULL
5691 };
5692
5693 static const struct attribute_group thermal_temp_input16_group = {
5694 .attrs = thermal_temp_input_attr
5695 };
5696
5697 static const struct attribute_group thermal_temp_input8_group = {
5698 .attrs = &thermal_temp_input_attr[8]
5699 };
5700
5701 #undef THERMAL_SENSOR_ATTR_TEMP
5702 #undef THERMAL_ATTRS
5703
5704 /* --------------------------------------------------------------------- */
5705
5706 static int __init thermal_init(struct ibm_init_struct *iibm)
5707 {
5708 u8 t, ta1, ta2;
5709 int i;
5710 int acpi_tmp7;
5711 int res;
5712
5713 vdbg_printk(TPACPI_DBG_INIT, "initializing thermal subdriver\n");
5714
5715 acpi_tmp7 = acpi_evalf(ec_handle, NULL, "TMP7", "qv");
5716
5717 if (thinkpad_id.ec_model) {
5718 /*
5719 * Direct EC access mode: sensors at registers
5720 * 0x78-0x7F, 0xC0-0xC7. Registers return 0x00 for
5721 * non-implemented, thermal sensors return 0x80 when
5722 * not available
5723 */
5724
5725 ta1 = ta2 = 0;
5726 for (i = 0; i < 8; i++) {
5727 if (acpi_ec_read(TP_EC_THERMAL_TMP0 + i, &t)) {
5728 ta1 |= t;
5729 } else {
5730 ta1 = 0;
5731 break;
5732 }
5733 if (acpi_ec_read(TP_EC_THERMAL_TMP8 + i, &t)) {
5734 ta2 |= t;
5735 } else {
5736 ta1 = 0;
5737 break;
5738 }
5739 }
5740 if (ta1 == 0) {
5741 /* This is sheer paranoia, but we handle it anyway */
5742 if (acpi_tmp7) {
5743 pr_err("ThinkPad ACPI EC access misbehaving, "
5744 "falling back to ACPI TMPx access "
5745 "mode\n");
5746 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
5747 } else {
5748 pr_err("ThinkPad ACPI EC access misbehaving, "
5749 "disabling thermal sensors access\n");
5750 thermal_read_mode = TPACPI_THERMAL_NONE;
5751 }
5752 } else {
5753 thermal_read_mode =
5754 (ta2 != 0) ?
5755 TPACPI_THERMAL_TPEC_16 : TPACPI_THERMAL_TPEC_8;
5756 }
5757 } else if (acpi_tmp7) {
5758 if (tpacpi_is_ibm() &&
5759 acpi_evalf(ec_handle, NULL, "UPDT", "qv")) {
5760 /* 600e/x, 770e, 770x */
5761 thermal_read_mode = TPACPI_THERMAL_ACPI_UPDT;
5762 } else {
5763 /* IBM/LENOVO DSDT EC.TMPx access, max 8 sensors */
5764 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
5765 }
5766 } else {
5767 /* temperatures not supported on 570, G4x, R30, R31, R32 */
5768 thermal_read_mode = TPACPI_THERMAL_NONE;
5769 }
5770
5771 vdbg_printk(TPACPI_DBG_INIT, "thermal is %s, mode %d\n",
5772 str_supported(thermal_read_mode != TPACPI_THERMAL_NONE),
5773 thermal_read_mode);
5774
5775 switch (thermal_read_mode) {
5776 case TPACPI_THERMAL_TPEC_16:
5777 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
5778 &thermal_temp_input16_group);
5779 if (res)
5780 return res;
5781 break;
5782 case TPACPI_THERMAL_TPEC_8:
5783 case TPACPI_THERMAL_ACPI_TMP07:
5784 case TPACPI_THERMAL_ACPI_UPDT:
5785 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
5786 &thermal_temp_input8_group);
5787 if (res)
5788 return res;
5789 break;
5790 case TPACPI_THERMAL_NONE:
5791 default:
5792 return 1;
5793 }
5794
5795 return 0;
5796 }
5797
5798 static void thermal_exit(void)
5799 {
5800 switch (thermal_read_mode) {
5801 case TPACPI_THERMAL_TPEC_16:
5802 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
5803 &thermal_temp_input16_group);
5804 break;
5805 case TPACPI_THERMAL_TPEC_8:
5806 case TPACPI_THERMAL_ACPI_TMP07:
5807 case TPACPI_THERMAL_ACPI_UPDT:
5808 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
5809 &thermal_temp_input8_group);
5810 break;
5811 case TPACPI_THERMAL_NONE:
5812 default:
5813 break;
5814 }
5815 }
5816
5817 static int thermal_read(struct seq_file *m)
5818 {
5819 int n, i;
5820 struct ibm_thermal_sensors_struct t;
5821
5822 n = thermal_get_sensors(&t);
5823 if (unlikely(n < 0))
5824 return n;
5825
5826 seq_printf(m, "temperatures:\t");
5827
5828 if (n > 0) {
5829 for (i = 0; i < (n - 1); i++)
5830 seq_printf(m, "%d ", t.temp[i] / 1000);
5831 seq_printf(m, "%d\n", t.temp[i] / 1000);
5832 } else
5833 seq_printf(m, "not supported\n");
5834
5835 return 0;
5836 }
5837
5838 static struct ibm_struct thermal_driver_data = {
5839 .name = "thermal",
5840 .read = thermal_read,
5841 .exit = thermal_exit,
5842 };
5843
5844 /*************************************************************************
5845 * Backlight/brightness subdriver
5846 */
5847
5848 #define TPACPI_BACKLIGHT_DEV_NAME "thinkpad_screen"
5849
5850 /*
5851 * ThinkPads can read brightness from two places: EC HBRV (0x31), or
5852 * CMOS NVRAM byte 0x5E, bits 0-3.
5853 *
5854 * EC HBRV (0x31) has the following layout
5855 * Bit 7: unknown function
5856 * Bit 6: unknown function
5857 * Bit 5: Z: honour scale changes, NZ: ignore scale changes
5858 * Bit 4: must be set to zero to avoid problems
5859 * Bit 3-0: backlight brightness level
5860 *
5861 * brightness_get_raw returns status data in the HBRV layout
5862 *
5863 * WARNING: The X61 has been verified to use HBRV for something else, so
5864 * this should be used _only_ on IBM ThinkPads, and maybe with some careful
5865 * testing on the very early *60 Lenovo models...
5866 */
5867
5868 enum {
5869 TP_EC_BACKLIGHT = 0x31,
5870
5871 /* TP_EC_BACKLIGHT bitmasks */
5872 TP_EC_BACKLIGHT_LVLMSK = 0x1F,
5873 TP_EC_BACKLIGHT_CMDMSK = 0xE0,
5874 TP_EC_BACKLIGHT_MAPSW = 0x20,
5875 };
5876
5877 enum tpacpi_brightness_access_mode {
5878 TPACPI_BRGHT_MODE_AUTO = 0, /* Not implemented yet */
5879 TPACPI_BRGHT_MODE_EC, /* EC control */
5880 TPACPI_BRGHT_MODE_UCMS_STEP, /* UCMS step-based control */
5881 TPACPI_BRGHT_MODE_ECNVRAM, /* EC control w/ NVRAM store */
5882 TPACPI_BRGHT_MODE_MAX
5883 };
5884
5885 static struct backlight_device *ibm_backlight_device;
5886
5887 static enum tpacpi_brightness_access_mode brightness_mode =
5888 TPACPI_BRGHT_MODE_MAX;
5889
5890 static unsigned int brightness_enable = 2; /* 2 = auto, 0 = no, 1 = yes */
5891
5892 static struct mutex brightness_mutex;
5893
5894 /* NVRAM brightness access,
5895 * call with brightness_mutex held! */
5896 static unsigned int tpacpi_brightness_nvram_get(void)
5897 {
5898 u8 lnvram;
5899
5900 lnvram = (nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS)
5901 & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
5902 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
5903 lnvram &= bright_maxlvl;
5904
5905 return lnvram;
5906 }
5907
5908 static void tpacpi_brightness_checkpoint_nvram(void)
5909 {
5910 u8 lec = 0;
5911 u8 b_nvram;
5912
5913 if (brightness_mode != TPACPI_BRGHT_MODE_ECNVRAM)
5914 return;
5915
5916 vdbg_printk(TPACPI_DBG_BRGHT,
5917 "trying to checkpoint backlight level to NVRAM...\n");
5918
5919 if (mutex_lock_killable(&brightness_mutex) < 0)
5920 return;
5921
5922 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
5923 goto unlock;
5924 lec &= TP_EC_BACKLIGHT_LVLMSK;
5925 b_nvram = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS);
5926
5927 if (lec != ((b_nvram & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
5928 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS)) {
5929 /* NVRAM needs update */
5930 b_nvram &= ~(TP_NVRAM_MASK_LEVEL_BRIGHTNESS <<
5931 TP_NVRAM_POS_LEVEL_BRIGHTNESS);
5932 b_nvram |= lec;
5933 nvram_write_byte(b_nvram, TP_NVRAM_ADDR_BRIGHTNESS);
5934 dbg_printk(TPACPI_DBG_BRGHT,
5935 "updated NVRAM backlight level to %u (0x%02x)\n",
5936 (unsigned int) lec, (unsigned int) b_nvram);
5937 } else
5938 vdbg_printk(TPACPI_DBG_BRGHT,
5939 "NVRAM backlight level already is %u (0x%02x)\n",
5940 (unsigned int) lec, (unsigned int) b_nvram);
5941
5942 unlock:
5943 mutex_unlock(&brightness_mutex);
5944 }
5945
5946
5947 /* call with brightness_mutex held! */
5948 static int tpacpi_brightness_get_raw(int *status)
5949 {
5950 u8 lec = 0;
5951
5952 switch (brightness_mode) {
5953 case TPACPI_BRGHT_MODE_UCMS_STEP:
5954 *status = tpacpi_brightness_nvram_get();
5955 return 0;
5956 case TPACPI_BRGHT_MODE_EC:
5957 case TPACPI_BRGHT_MODE_ECNVRAM:
5958 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
5959 return -EIO;
5960 *status = lec;
5961 return 0;
5962 default:
5963 return -ENXIO;
5964 }
5965 }
5966
5967 /* call with brightness_mutex held! */
5968 /* do NOT call with illegal backlight level value */
5969 static int tpacpi_brightness_set_ec(unsigned int value)
5970 {
5971 u8 lec = 0;
5972
5973 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
5974 return -EIO;
5975
5976 if (unlikely(!acpi_ec_write(TP_EC_BACKLIGHT,
5977 (lec & TP_EC_BACKLIGHT_CMDMSK) |
5978 (value & TP_EC_BACKLIGHT_LVLMSK))))
5979 return -EIO;
5980
5981 return 0;
5982 }
5983
5984 /* call with brightness_mutex held! */
5985 static int tpacpi_brightness_set_ucmsstep(unsigned int value)
5986 {
5987 int cmos_cmd, inc;
5988 unsigned int current_value, i;
5989
5990 current_value = tpacpi_brightness_nvram_get();
5991
5992 if (value == current_value)
5993 return 0;
5994
5995 cmos_cmd = (value > current_value) ?
5996 TP_CMOS_BRIGHTNESS_UP :
5997 TP_CMOS_BRIGHTNESS_DOWN;
5998 inc = (value > current_value) ? 1 : -1;
5999
6000 for (i = current_value; i != value; i += inc)
6001 if (issue_thinkpad_cmos_command(cmos_cmd))
6002 return -EIO;
6003
6004 return 0;
6005 }
6006
6007 /* May return EINTR which can always be mapped to ERESTARTSYS */
6008 static int brightness_set(unsigned int value)
6009 {
6010 int res;
6011
6012 if (value > bright_maxlvl || value < 0)
6013 return -EINVAL;
6014
6015 vdbg_printk(TPACPI_DBG_BRGHT,
6016 "set backlight level to %d\n", value);
6017
6018 res = mutex_lock_killable(&brightness_mutex);
6019 if (res < 0)
6020 return res;
6021
6022 switch (brightness_mode) {
6023 case TPACPI_BRGHT_MODE_EC:
6024 case TPACPI_BRGHT_MODE_ECNVRAM:
6025 res = tpacpi_brightness_set_ec(value);
6026 break;
6027 case TPACPI_BRGHT_MODE_UCMS_STEP:
6028 res = tpacpi_brightness_set_ucmsstep(value);
6029 break;
6030 default:
6031 res = -ENXIO;
6032 }
6033
6034 mutex_unlock(&brightness_mutex);
6035 return res;
6036 }
6037
6038 /* sysfs backlight class ----------------------------------------------- */
6039
6040 static int brightness_update_status(struct backlight_device *bd)
6041 {
6042 unsigned int level =
6043 (bd->props.fb_blank == FB_BLANK_UNBLANK &&
6044 bd->props.power == FB_BLANK_UNBLANK) ?
6045 bd->props.brightness : 0;
6046
6047 dbg_printk(TPACPI_DBG_BRGHT,
6048 "backlight: attempt to set level to %d\n",
6049 level);
6050
6051 /* it is the backlight class's job (caller) to handle
6052 * EINTR and other errors properly */
6053 return brightness_set(level);
6054 }
6055
6056 static int brightness_get(struct backlight_device *bd)
6057 {
6058 int status, res;
6059
6060 res = mutex_lock_killable(&brightness_mutex);
6061 if (res < 0)
6062 return 0;
6063
6064 res = tpacpi_brightness_get_raw(&status);
6065
6066 mutex_unlock(&brightness_mutex);
6067
6068 if (res < 0)
6069 return 0;
6070
6071 return status & TP_EC_BACKLIGHT_LVLMSK;
6072 }
6073
6074 static void tpacpi_brightness_notify_change(void)
6075 {
6076 backlight_force_update(ibm_backlight_device,
6077 BACKLIGHT_UPDATE_HOTKEY);
6078 }
6079
6080 static const struct backlight_ops ibm_backlight_data = {
6081 .get_brightness = brightness_get,
6082 .update_status = brightness_update_status,
6083 };
6084
6085 /* --------------------------------------------------------------------- */
6086
6087 /*
6088 * Call _BCL method of video device. On some ThinkPads this will
6089 * switch the firmware to the ACPI brightness control mode.
6090 */
6091
6092 static int __init tpacpi_query_bcl_levels(acpi_handle handle)
6093 {
6094 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
6095 union acpi_object *obj;
6096 struct acpi_device *device, *child;
6097 int rc;
6098
6099 if (acpi_bus_get_device(handle, &device))
6100 return 0;
6101
6102 rc = 0;
6103 list_for_each_entry(child, &device->children, node) {
6104 acpi_status status = acpi_evaluate_object(child->handle, "_BCL",
6105 NULL, &buffer);
6106 if (ACPI_FAILURE(status))
6107 continue;
6108
6109 obj = (union acpi_object *)buffer.pointer;
6110 if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) {
6111 pr_err("Unknown _BCL data, please report this to %s\n",
6112 TPACPI_MAIL);
6113 rc = 0;
6114 } else {
6115 rc = obj->package.count;
6116 }
6117 break;
6118 }
6119
6120 kfree(buffer.pointer);
6121 return rc;
6122 }
6123
6124
6125 /*
6126 * Returns 0 (no ACPI _BCL or _BCL invalid), or size of brightness map
6127 */
6128 static unsigned int __init tpacpi_check_std_acpi_brightness_support(void)
6129 {
6130 acpi_handle video_device;
6131 int bcl_levels = 0;
6132
6133 tpacpi_acpi_handle_locate("video", NULL, &video_device);
6134 if (video_device)
6135 bcl_levels = tpacpi_query_bcl_levels(video_device);
6136
6137 tp_features.bright_acpimode = (bcl_levels > 0);
6138
6139 return (bcl_levels > 2) ? (bcl_levels - 2) : 0;
6140 }
6141
6142 /*
6143 * These are only useful for models that have only one possibility
6144 * of GPU. If the BIOS model handles both ATI and Intel, don't use
6145 * these quirks.
6146 */
6147 #define TPACPI_BRGHT_Q_NOEC 0x0001 /* Must NOT use EC HBRV */
6148 #define TPACPI_BRGHT_Q_EC 0x0002 /* Should or must use EC HBRV */
6149 #define TPACPI_BRGHT_Q_ASK 0x8000 /* Ask for user report */
6150
6151 static const struct tpacpi_quirk brightness_quirk_table[] __initconst = {
6152 /* Models with ATI GPUs known to require ECNVRAM mode */
6153 TPACPI_Q_IBM('1', 'Y', TPACPI_BRGHT_Q_EC), /* T43/p ATI */
6154
6155 /* Models with ATI GPUs that can use ECNVRAM */
6156 TPACPI_Q_IBM('1', 'R', TPACPI_BRGHT_Q_EC), /* R50,51 T40-42 */
6157 TPACPI_Q_IBM('1', 'Q', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
6158 TPACPI_Q_IBM('7', '6', TPACPI_BRGHT_Q_EC), /* R52 */
6159 TPACPI_Q_IBM('7', '8', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
6160
6161 /* Models with Intel Extreme Graphics 2 */
6162 TPACPI_Q_IBM('1', 'U', TPACPI_BRGHT_Q_NOEC), /* X40 */
6163 TPACPI_Q_IBM('1', 'V', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
6164 TPACPI_Q_IBM('1', 'W', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
6165
6166 /* Models with Intel GMA900 */
6167 TPACPI_Q_IBM('7', '0', TPACPI_BRGHT_Q_NOEC), /* T43, R52 */
6168 TPACPI_Q_IBM('7', '4', TPACPI_BRGHT_Q_NOEC), /* X41 */
6169 TPACPI_Q_IBM('7', '5', TPACPI_BRGHT_Q_NOEC), /* X41 Tablet */
6170 };
6171
6172 /*
6173 * Returns < 0 for error, otherwise sets tp_features.bright_*
6174 * and bright_maxlvl.
6175 */
6176 static void __init tpacpi_detect_brightness_capabilities(void)
6177 {
6178 unsigned int b;
6179
6180 vdbg_printk(TPACPI_DBG_INIT,
6181 "detecting firmware brightness interface capabilities\n");
6182
6183 /* we could run a quirks check here (same table used by
6184 * brightness_init) if needed */
6185
6186 /*
6187 * We always attempt to detect acpi support, so as to switch
6188 * Lenovo Vista BIOS to ACPI brightness mode even if we are not
6189 * going to publish a backlight interface
6190 */
6191 b = tpacpi_check_std_acpi_brightness_support();
6192 switch (b) {
6193 case 16:
6194 bright_maxlvl = 15;
6195 pr_info("detected a 16-level brightness capable ThinkPad\n");
6196 break;
6197 case 8:
6198 case 0:
6199 bright_maxlvl = 7;
6200 pr_info("detected a 8-level brightness capable ThinkPad\n");
6201 break;
6202 default:
6203 pr_err("Unsupported brightness interface, "
6204 "please contact %s\n", TPACPI_MAIL);
6205 tp_features.bright_unkfw = 1;
6206 bright_maxlvl = b - 1;
6207 }
6208 }
6209
6210 static int __init brightness_init(struct ibm_init_struct *iibm)
6211 {
6212 struct backlight_properties props;
6213 int b;
6214 unsigned long quirks;
6215
6216 vdbg_printk(TPACPI_DBG_INIT, "initializing brightness subdriver\n");
6217
6218 mutex_init(&brightness_mutex);
6219
6220 quirks = tpacpi_check_quirks(brightness_quirk_table,
6221 ARRAY_SIZE(brightness_quirk_table));
6222
6223 /* tpacpi_detect_brightness_capabilities() must have run already */
6224
6225 /* if it is unknown, we don't handle it: it wouldn't be safe */
6226 if (tp_features.bright_unkfw)
6227 return 1;
6228
6229 if (!brightness_enable) {
6230 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT,
6231 "brightness support disabled by "
6232 "module parameter\n");
6233 return 1;
6234 }
6235
6236 if (acpi_video_backlight_support()) {
6237 if (brightness_enable > 1) {
6238 pr_info("Standard ACPI backlight interface "
6239 "available, not loading native one\n");
6240 return 1;
6241 } else if (brightness_enable == 1) {
6242 pr_warn("Cannot enable backlight brightness support, "
6243 "ACPI is already handling it. Refer to the "
6244 "acpi_backlight kernel parameter.\n");
6245 return 1;
6246 }
6247 } else if (tp_features.bright_acpimode && brightness_enable > 1) {
6248 pr_notice("Standard ACPI backlight interface not "
6249 "available, thinkpad_acpi native "
6250 "brightness control enabled\n");
6251 }
6252
6253 /*
6254 * Check for module parameter bogosity, note that we
6255 * init brightness_mode to TPACPI_BRGHT_MODE_MAX in order to be
6256 * able to detect "unspecified"
6257 */
6258 if (brightness_mode > TPACPI_BRGHT_MODE_MAX)
6259 return -EINVAL;
6260
6261 /* TPACPI_BRGHT_MODE_AUTO not implemented yet, just use default */
6262 if (brightness_mode == TPACPI_BRGHT_MODE_AUTO ||
6263 brightness_mode == TPACPI_BRGHT_MODE_MAX) {
6264 if (quirks & TPACPI_BRGHT_Q_EC)
6265 brightness_mode = TPACPI_BRGHT_MODE_ECNVRAM;
6266 else
6267 brightness_mode = TPACPI_BRGHT_MODE_UCMS_STEP;
6268
6269 dbg_printk(TPACPI_DBG_BRGHT,
6270 "driver auto-selected brightness_mode=%d\n",
6271 brightness_mode);
6272 }
6273
6274 /* Safety */
6275 if (!tpacpi_is_ibm() &&
6276 (brightness_mode == TPACPI_BRGHT_MODE_ECNVRAM ||
6277 brightness_mode == TPACPI_BRGHT_MODE_EC))
6278 return -EINVAL;
6279
6280 if (tpacpi_brightness_get_raw(&b) < 0)
6281 return 1;
6282
6283 memset(&props, 0, sizeof(struct backlight_properties));
6284 props.type = BACKLIGHT_PLATFORM;
6285 props.max_brightness = bright_maxlvl;
6286 props.brightness = b & TP_EC_BACKLIGHT_LVLMSK;
6287 ibm_backlight_device = backlight_device_register(TPACPI_BACKLIGHT_DEV_NAME,
6288 NULL, NULL,
6289 &ibm_backlight_data,
6290 &props);
6291 if (IS_ERR(ibm_backlight_device)) {
6292 int rc = PTR_ERR(ibm_backlight_device);
6293 ibm_backlight_device = NULL;
6294 pr_err("Could not register backlight device\n");
6295 return rc;
6296 }
6297 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT,
6298 "brightness is supported\n");
6299
6300 if (quirks & TPACPI_BRGHT_Q_ASK) {
6301 pr_notice("brightness: will use unverified default: "
6302 "brightness_mode=%d\n", brightness_mode);
6303 pr_notice("brightness: please report to %s whether it works well "
6304 "or not on your ThinkPad\n", TPACPI_MAIL);
6305 }
6306
6307 /* Added by mistake in early 2007. Probably useless, but it could
6308 * be working around some unknown firmware problem where the value
6309 * read at startup doesn't match the real hardware state... so leave
6310 * it in place just in case */
6311 backlight_update_status(ibm_backlight_device);
6312
6313 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT,
6314 "brightness: registering brightness hotkeys "
6315 "as change notification\n");
6316 tpacpi_hotkey_driver_mask_set(hotkey_driver_mask
6317 | TP_ACPI_HKEY_BRGHTUP_MASK
6318 | TP_ACPI_HKEY_BRGHTDWN_MASK);
6319 return 0;
6320 }
6321
6322 static void brightness_suspend(void)
6323 {
6324 tpacpi_brightness_checkpoint_nvram();
6325 }
6326
6327 static void brightness_shutdown(void)
6328 {
6329 tpacpi_brightness_checkpoint_nvram();
6330 }
6331
6332 static void brightness_exit(void)
6333 {
6334 if (ibm_backlight_device) {
6335 vdbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_BRGHT,
6336 "calling backlight_device_unregister()\n");
6337 backlight_device_unregister(ibm_backlight_device);
6338 }
6339
6340 tpacpi_brightness_checkpoint_nvram();
6341 }
6342
6343 static int brightness_read(struct seq_file *m)
6344 {
6345 int level;
6346
6347 level = brightness_get(NULL);
6348 if (level < 0) {
6349 seq_printf(m, "level:\t\tunreadable\n");
6350 } else {
6351 seq_printf(m, "level:\t\t%d\n", level);
6352 seq_printf(m, "commands:\tup, down\n");
6353 seq_printf(m, "commands:\tlevel <level> (<level> is 0-%d)\n",
6354 bright_maxlvl);
6355 }
6356
6357 return 0;
6358 }
6359
6360 static int brightness_write(char *buf)
6361 {
6362 int level;
6363 int rc;
6364 char *cmd;
6365
6366 level = brightness_get(NULL);
6367 if (level < 0)
6368 return level;
6369
6370 while ((cmd = next_cmd(&buf))) {
6371 if (strlencmp(cmd, "up") == 0) {
6372 if (level < bright_maxlvl)
6373 level++;
6374 } else if (strlencmp(cmd, "down") == 0) {
6375 if (level > 0)
6376 level--;
6377 } else if (sscanf(cmd, "level %d", &level) == 1 &&
6378 level >= 0 && level <= bright_maxlvl) {
6379 /* new level set */
6380 } else
6381 return -EINVAL;
6382 }
6383
6384 tpacpi_disclose_usertask("procfs brightness",
6385 "set level to %d\n", level);
6386
6387 /*
6388 * Now we know what the final level should be, so we try to set it.
6389 * Doing it this way makes the syscall restartable in case of EINTR
6390 */
6391 rc = brightness_set(level);
6392 if (!rc && ibm_backlight_device)
6393 backlight_force_update(ibm_backlight_device,
6394 BACKLIGHT_UPDATE_SYSFS);
6395 return (rc == -EINTR)? -ERESTARTSYS : rc;
6396 }
6397
6398 static struct ibm_struct brightness_driver_data = {
6399 .name = "brightness",
6400 .read = brightness_read,
6401 .write = brightness_write,
6402 .exit = brightness_exit,
6403 .suspend = brightness_suspend,
6404 .shutdown = brightness_shutdown,
6405 };
6406
6407 /*************************************************************************
6408 * Volume subdriver
6409 */
6410
6411 /*
6412 * IBM ThinkPads have a simple volume controller with MUTE gating.
6413 * Very early Lenovo ThinkPads follow the IBM ThinkPad spec.
6414 *
6415 * Since the *61 series (and probably also the later *60 series), Lenovo
6416 * ThinkPads only implement the MUTE gate.
6417 *
6418 * EC register 0x30
6419 * Bit 6: MUTE (1 mutes sound)
6420 * Bit 3-0: Volume
6421 * Other bits should be zero as far as we know.
6422 *
6423 * This is also stored in CMOS NVRAM, byte 0x60, bit 6 (MUTE), and
6424 * bits 3-0 (volume). Other bits in NVRAM may have other functions,
6425 * such as bit 7 which is used to detect repeated presses of MUTE,
6426 * and we leave them unchanged.
6427 */
6428
6429 #ifdef CONFIG_THINKPAD_ACPI_ALSA_SUPPORT
6430
6431 #define TPACPI_ALSA_DRVNAME "ThinkPad EC"
6432 #define TPACPI_ALSA_SHRTNAME "ThinkPad Console Audio Control"
6433 #define TPACPI_ALSA_MIXERNAME TPACPI_ALSA_SHRTNAME
6434
6435 #if SNDRV_CARDS <= 32
6436 #define DEFAULT_ALSA_IDX ~((1 << (SNDRV_CARDS - 3)) - 1)
6437 #else
6438 #define DEFAULT_ALSA_IDX ~((1 << (32 - 3)) - 1)
6439 #endif
6440 static int alsa_index = DEFAULT_ALSA_IDX; /* last three slots */
6441 static char *alsa_id = "ThinkPadEC";
6442 static bool alsa_enable = SNDRV_DEFAULT_ENABLE1;
6443
6444 struct tpacpi_alsa_data {
6445 struct snd_card *card;
6446 struct snd_ctl_elem_id *ctl_mute_id;
6447 struct snd_ctl_elem_id *ctl_vol_id;
6448 };
6449
6450 static struct snd_card *alsa_card;
6451
6452 enum {
6453 TP_EC_AUDIO = 0x30,
6454
6455 /* TP_EC_AUDIO bits */
6456 TP_EC_AUDIO_MUTESW = 6,
6457
6458 /* TP_EC_AUDIO bitmasks */
6459 TP_EC_AUDIO_LVL_MSK = 0x0F,
6460 TP_EC_AUDIO_MUTESW_MSK = (1 << TP_EC_AUDIO_MUTESW),
6461
6462 /* Maximum volume */
6463 TP_EC_VOLUME_MAX = 14,
6464 };
6465
6466 enum tpacpi_volume_access_mode {
6467 TPACPI_VOL_MODE_AUTO = 0, /* Not implemented yet */
6468 TPACPI_VOL_MODE_EC, /* Pure EC control */
6469 TPACPI_VOL_MODE_UCMS_STEP, /* UCMS step-based control: N/A */
6470 TPACPI_VOL_MODE_ECNVRAM, /* EC control w/ NVRAM store */
6471 TPACPI_VOL_MODE_MAX
6472 };
6473
6474 enum tpacpi_volume_capabilities {
6475 TPACPI_VOL_CAP_AUTO = 0, /* Use white/blacklist */
6476 TPACPI_VOL_CAP_VOLMUTE, /* Output vol and mute */
6477 TPACPI_VOL_CAP_MUTEONLY, /* Output mute only */
6478 TPACPI_VOL_CAP_MAX
6479 };
6480
6481 static enum tpacpi_volume_access_mode volume_mode =
6482 TPACPI_VOL_MODE_MAX;
6483
6484 static enum tpacpi_volume_capabilities volume_capabilities;
6485 static bool volume_control_allowed;
6486
6487 /*
6488 * Used to syncronize writers to TP_EC_AUDIO and
6489 * TP_NVRAM_ADDR_MIXER, as we need to do read-modify-write
6490 */
6491 static struct mutex volume_mutex;
6492
6493 static void tpacpi_volume_checkpoint_nvram(void)
6494 {
6495 u8 lec = 0;
6496 u8 b_nvram;
6497 u8 ec_mask;
6498
6499 if (volume_mode != TPACPI_VOL_MODE_ECNVRAM)
6500 return;
6501 if (!volume_control_allowed)
6502 return;
6503
6504 vdbg_printk(TPACPI_DBG_MIXER,
6505 "trying to checkpoint mixer state to NVRAM...\n");
6506
6507 if (tp_features.mixer_no_level_control)
6508 ec_mask = TP_EC_AUDIO_MUTESW_MSK;
6509 else
6510 ec_mask = TP_EC_AUDIO_MUTESW_MSK | TP_EC_AUDIO_LVL_MSK;
6511
6512 if (mutex_lock_killable(&volume_mutex) < 0)
6513 return;
6514
6515 if (unlikely(!acpi_ec_read(TP_EC_AUDIO, &lec)))
6516 goto unlock;
6517 lec &= ec_mask;
6518 b_nvram = nvram_read_byte(TP_NVRAM_ADDR_MIXER);
6519
6520 if (lec != (b_nvram & ec_mask)) {
6521 /* NVRAM needs update */
6522 b_nvram &= ~ec_mask;
6523 b_nvram |= lec;
6524 nvram_write_byte(b_nvram, TP_NVRAM_ADDR_MIXER);
6525 dbg_printk(TPACPI_DBG_MIXER,
6526 "updated NVRAM mixer status to 0x%02x (0x%02x)\n",
6527 (unsigned int) lec, (unsigned int) b_nvram);
6528 } else {
6529 vdbg_printk(TPACPI_DBG_MIXER,
6530 "NVRAM mixer status already is 0x%02x (0x%02x)\n",
6531 (unsigned int) lec, (unsigned int) b_nvram);
6532 }
6533
6534 unlock:
6535 mutex_unlock(&volume_mutex);
6536 }
6537
6538 static int volume_get_status_ec(u8 *status)
6539 {
6540 u8 s;
6541
6542 if (!acpi_ec_read(TP_EC_AUDIO, &s))
6543 return -EIO;
6544
6545 *status = s;
6546
6547 dbg_printk(TPACPI_DBG_MIXER, "status 0x%02x\n", s);
6548
6549 return 0;
6550 }
6551
6552 static int volume_get_status(u8 *status)
6553 {
6554 return volume_get_status_ec(status);
6555 }
6556
6557 static int volume_set_status_ec(const u8 status)
6558 {
6559 if (!acpi_ec_write(TP_EC_AUDIO, status))
6560 return -EIO;
6561
6562 dbg_printk(TPACPI_DBG_MIXER, "set EC mixer to 0x%02x\n", status);
6563
6564 return 0;
6565 }
6566
6567 static int volume_set_status(const u8 status)
6568 {
6569 return volume_set_status_ec(status);
6570 }
6571
6572 /* returns < 0 on error, 0 on no change, 1 on change */
6573 static int __volume_set_mute_ec(const bool mute)
6574 {
6575 int rc;
6576 u8 s, n;
6577
6578 if (mutex_lock_killable(&volume_mutex) < 0)
6579 return -EINTR;
6580
6581 rc = volume_get_status_ec(&s);
6582 if (rc)
6583 goto unlock;
6584
6585 n = (mute) ? s | TP_EC_AUDIO_MUTESW_MSK :
6586 s & ~TP_EC_AUDIO_MUTESW_MSK;
6587
6588 if (n != s) {
6589 rc = volume_set_status_ec(n);
6590 if (!rc)
6591 rc = 1;
6592 }
6593
6594 unlock:
6595 mutex_unlock(&volume_mutex);
6596 return rc;
6597 }
6598
6599 static int volume_alsa_set_mute(const bool mute)
6600 {
6601 dbg_printk(TPACPI_DBG_MIXER, "ALSA: trying to %smute\n",
6602 (mute) ? "" : "un");
6603 return __volume_set_mute_ec(mute);
6604 }
6605
6606 static int volume_set_mute(const bool mute)
6607 {
6608 int rc;
6609
6610 dbg_printk(TPACPI_DBG_MIXER, "trying to %smute\n",
6611 (mute) ? "" : "un");
6612
6613 rc = __volume_set_mute_ec(mute);
6614 return (rc < 0) ? rc : 0;
6615 }
6616
6617 /* returns < 0 on error, 0 on no change, 1 on change */
6618 static int __volume_set_volume_ec(const u8 vol)
6619 {
6620 int rc;
6621 u8 s, n;
6622
6623 if (vol > TP_EC_VOLUME_MAX)
6624 return -EINVAL;
6625
6626 if (mutex_lock_killable(&volume_mutex) < 0)
6627 return -EINTR;
6628
6629 rc = volume_get_status_ec(&s);
6630 if (rc)
6631 goto unlock;
6632
6633 n = (s & ~TP_EC_AUDIO_LVL_MSK) | vol;
6634
6635 if (n != s) {
6636 rc = volume_set_status_ec(n);
6637 if (!rc)
6638 rc = 1;
6639 }
6640
6641 unlock:
6642 mutex_unlock(&volume_mutex);
6643 return rc;
6644 }
6645
6646 static int volume_alsa_set_volume(const u8 vol)
6647 {
6648 dbg_printk(TPACPI_DBG_MIXER,
6649 "ALSA: trying to set volume level to %hu\n", vol);
6650 return __volume_set_volume_ec(vol);
6651 }
6652
6653 static void volume_alsa_notify_change(void)
6654 {
6655 struct tpacpi_alsa_data *d;
6656
6657 if (alsa_card && alsa_card->private_data) {
6658 d = alsa_card->private_data;
6659 if (d->ctl_mute_id)
6660 snd_ctl_notify(alsa_card,
6661 SNDRV_CTL_EVENT_MASK_VALUE,
6662 d->ctl_mute_id);
6663 if (d->ctl_vol_id)
6664 snd_ctl_notify(alsa_card,
6665 SNDRV_CTL_EVENT_MASK_VALUE,
6666 d->ctl_vol_id);
6667 }
6668 }
6669
6670 static int volume_alsa_vol_info(struct snd_kcontrol *kcontrol,
6671 struct snd_ctl_elem_info *uinfo)
6672 {
6673 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
6674 uinfo->count = 1;
6675 uinfo->value.integer.min = 0;
6676 uinfo->value.integer.max = TP_EC_VOLUME_MAX;
6677 return 0;
6678 }
6679
6680 static int volume_alsa_vol_get(struct snd_kcontrol *kcontrol,
6681 struct snd_ctl_elem_value *ucontrol)
6682 {
6683 u8 s;
6684 int rc;
6685
6686 rc = volume_get_status(&s);
6687 if (rc < 0)
6688 return rc;
6689
6690 ucontrol->value.integer.value[0] = s & TP_EC_AUDIO_LVL_MSK;
6691 return 0;
6692 }
6693
6694 static int volume_alsa_vol_put(struct snd_kcontrol *kcontrol,
6695 struct snd_ctl_elem_value *ucontrol)
6696 {
6697 tpacpi_disclose_usertask("ALSA", "set volume to %ld\n",
6698 ucontrol->value.integer.value[0]);
6699 return volume_alsa_set_volume(ucontrol->value.integer.value[0]);
6700 }
6701
6702 #define volume_alsa_mute_info snd_ctl_boolean_mono_info
6703
6704 static int volume_alsa_mute_get(struct snd_kcontrol *kcontrol,
6705 struct snd_ctl_elem_value *ucontrol)
6706 {
6707 u8 s;
6708 int rc;
6709
6710 rc = volume_get_status(&s);
6711 if (rc < 0)
6712 return rc;
6713
6714 ucontrol->value.integer.value[0] =
6715 (s & TP_EC_AUDIO_MUTESW_MSK) ? 0 : 1;
6716 return 0;
6717 }
6718
6719 static int volume_alsa_mute_put(struct snd_kcontrol *kcontrol,
6720 struct snd_ctl_elem_value *ucontrol)
6721 {
6722 tpacpi_disclose_usertask("ALSA", "%smute\n",
6723 ucontrol->value.integer.value[0] ?
6724 "un" : "");
6725 return volume_alsa_set_mute(!ucontrol->value.integer.value[0]);
6726 }
6727
6728 static struct snd_kcontrol_new volume_alsa_control_vol = {
6729 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
6730 .name = "Console Playback Volume",
6731 .index = 0,
6732 .access = SNDRV_CTL_ELEM_ACCESS_READ,
6733 .info = volume_alsa_vol_info,
6734 .get = volume_alsa_vol_get,
6735 };
6736
6737 static struct snd_kcontrol_new volume_alsa_control_mute = {
6738 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
6739 .name = "Console Playback Switch",
6740 .index = 0,
6741 .access = SNDRV_CTL_ELEM_ACCESS_READ,
6742 .info = volume_alsa_mute_info,
6743 .get = volume_alsa_mute_get,
6744 };
6745
6746 static void volume_suspend(void)
6747 {
6748 tpacpi_volume_checkpoint_nvram();
6749 }
6750
6751 static void volume_resume(void)
6752 {
6753 volume_alsa_notify_change();
6754 }
6755
6756 static void volume_shutdown(void)
6757 {
6758 tpacpi_volume_checkpoint_nvram();
6759 }
6760
6761 static void volume_exit(void)
6762 {
6763 if (alsa_card) {
6764 snd_card_free(alsa_card);
6765 alsa_card = NULL;
6766 }
6767
6768 tpacpi_volume_checkpoint_nvram();
6769 }
6770
6771 static int __init volume_create_alsa_mixer(void)
6772 {
6773 struct snd_card *card;
6774 struct tpacpi_alsa_data *data;
6775 struct snd_kcontrol *ctl_vol;
6776 struct snd_kcontrol *ctl_mute;
6777 int rc;
6778
6779 rc = snd_card_create(alsa_index, alsa_id, THIS_MODULE,
6780 sizeof(struct tpacpi_alsa_data), &card);
6781 if (rc < 0 || !card) {
6782 pr_err("Failed to create ALSA card structures: %d\n", rc);
6783 return 1;
6784 }
6785
6786 BUG_ON(!card->private_data);
6787 data = card->private_data;
6788 data->card = card;
6789
6790 strlcpy(card->driver, TPACPI_ALSA_DRVNAME,
6791 sizeof(card->driver));
6792 strlcpy(card->shortname, TPACPI_ALSA_SHRTNAME,
6793 sizeof(card->shortname));
6794 snprintf(card->mixername, sizeof(card->mixername), "ThinkPad EC %s",
6795 (thinkpad_id.ec_version_str) ?
6796 thinkpad_id.ec_version_str : "(unknown)");
6797 snprintf(card->longname, sizeof(card->longname),
6798 "%s at EC reg 0x%02x, fw %s", card->shortname, TP_EC_AUDIO,
6799 (thinkpad_id.ec_version_str) ?
6800 thinkpad_id.ec_version_str : "unknown");
6801
6802 if (volume_control_allowed) {
6803 volume_alsa_control_vol.put = volume_alsa_vol_put;
6804 volume_alsa_control_vol.access =
6805 SNDRV_CTL_ELEM_ACCESS_READWRITE;
6806
6807 volume_alsa_control_mute.put = volume_alsa_mute_put;
6808 volume_alsa_control_mute.access =
6809 SNDRV_CTL_ELEM_ACCESS_READWRITE;
6810 }
6811
6812 if (!tp_features.mixer_no_level_control) {
6813 ctl_vol = snd_ctl_new1(&volume_alsa_control_vol, NULL);
6814 rc = snd_ctl_add(card, ctl_vol);
6815 if (rc < 0) {
6816 pr_err("Failed to create ALSA volume control: %d\n",
6817 rc);
6818 goto err_exit;
6819 }
6820 data->ctl_vol_id = &ctl_vol->id;
6821 }
6822
6823 ctl_mute = snd_ctl_new1(&volume_alsa_control_mute, NULL);
6824 rc = snd_ctl_add(card, ctl_mute);
6825 if (rc < 0) {
6826 pr_err("Failed to create ALSA mute control: %d\n", rc);
6827 goto err_exit;
6828 }
6829 data->ctl_mute_id = &ctl_mute->id;
6830
6831 snd_card_set_dev(card, &tpacpi_pdev->dev);
6832 rc = snd_card_register(card);
6833 if (rc < 0) {
6834 pr_err("Failed to register ALSA card: %d\n", rc);
6835 goto err_exit;
6836 }
6837
6838 alsa_card = card;
6839 return 0;
6840
6841 err_exit:
6842 snd_card_free(card);
6843 return 1;
6844 }
6845
6846 #define TPACPI_VOL_Q_MUTEONLY 0x0001 /* Mute-only control available */
6847 #define TPACPI_VOL_Q_LEVEL 0x0002 /* Volume control available */
6848
6849 static const struct tpacpi_quirk volume_quirk_table[] __initconst = {
6850 /* Whitelist volume level on all IBM by default */
6851 { .vendor = PCI_VENDOR_ID_IBM,
6852 .bios = TPACPI_MATCH_ANY,
6853 .ec = TPACPI_MATCH_ANY,
6854 .quirks = TPACPI_VOL_Q_LEVEL },
6855
6856 /* Lenovo models with volume control (needs confirmation) */
6857 TPACPI_QEC_LNV('7', 'C', TPACPI_VOL_Q_LEVEL), /* R60/i */
6858 TPACPI_QEC_LNV('7', 'E', TPACPI_VOL_Q_LEVEL), /* R60e/i */
6859 TPACPI_QEC_LNV('7', '9', TPACPI_VOL_Q_LEVEL), /* T60/p */
6860 TPACPI_QEC_LNV('7', 'B', TPACPI_VOL_Q_LEVEL), /* X60/s */
6861 TPACPI_QEC_LNV('7', 'J', TPACPI_VOL_Q_LEVEL), /* X60t */
6862 TPACPI_QEC_LNV('7', '7', TPACPI_VOL_Q_LEVEL), /* Z60 */
6863 TPACPI_QEC_LNV('7', 'F', TPACPI_VOL_Q_LEVEL), /* Z61 */
6864
6865 /* Whitelist mute-only on all Lenovo by default */
6866 { .vendor = PCI_VENDOR_ID_LENOVO,
6867 .bios = TPACPI_MATCH_ANY,
6868 .ec = TPACPI_MATCH_ANY,
6869 .quirks = TPACPI_VOL_Q_MUTEONLY }
6870 };
6871
6872 static int __init volume_init(struct ibm_init_struct *iibm)
6873 {
6874 unsigned long quirks;
6875 int rc;
6876
6877 vdbg_printk(TPACPI_DBG_INIT, "initializing volume subdriver\n");
6878
6879 mutex_init(&volume_mutex);
6880
6881 /*
6882 * Check for module parameter bogosity, note that we
6883 * init volume_mode to TPACPI_VOL_MODE_MAX in order to be
6884 * able to detect "unspecified"
6885 */
6886 if (volume_mode > TPACPI_VOL_MODE_MAX)
6887 return -EINVAL;
6888
6889 if (volume_mode == TPACPI_VOL_MODE_UCMS_STEP) {
6890 pr_err("UCMS step volume mode not implemented, "
6891 "please contact %s\n", TPACPI_MAIL);
6892 return 1;
6893 }
6894
6895 if (volume_capabilities >= TPACPI_VOL_CAP_MAX)
6896 return -EINVAL;
6897
6898 /*
6899 * The ALSA mixer is our primary interface.
6900 * When disabled, don't install the subdriver at all
6901 */
6902 if (!alsa_enable) {
6903 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
6904 "ALSA mixer disabled by parameter, "
6905 "not loading volume subdriver...\n");
6906 return 1;
6907 }
6908
6909 quirks = tpacpi_check_quirks(volume_quirk_table,
6910 ARRAY_SIZE(volume_quirk_table));
6911
6912 switch (volume_capabilities) {
6913 case TPACPI_VOL_CAP_AUTO:
6914 if (quirks & TPACPI_VOL_Q_MUTEONLY)
6915 tp_features.mixer_no_level_control = 1;
6916 else if (quirks & TPACPI_VOL_Q_LEVEL)
6917 tp_features.mixer_no_level_control = 0;
6918 else
6919 return 1; /* no mixer */
6920 break;
6921 case TPACPI_VOL_CAP_VOLMUTE:
6922 tp_features.mixer_no_level_control = 0;
6923 break;
6924 case TPACPI_VOL_CAP_MUTEONLY:
6925 tp_features.mixer_no_level_control = 1;
6926 break;
6927 default:
6928 return 1;
6929 }
6930
6931 if (volume_capabilities != TPACPI_VOL_CAP_AUTO)
6932 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
6933 "using user-supplied volume_capabilities=%d\n",
6934 volume_capabilities);
6935
6936 if (volume_mode == TPACPI_VOL_MODE_AUTO ||
6937 volume_mode == TPACPI_VOL_MODE_MAX) {
6938 volume_mode = TPACPI_VOL_MODE_ECNVRAM;
6939
6940 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
6941 "driver auto-selected volume_mode=%d\n",
6942 volume_mode);
6943 } else {
6944 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
6945 "using user-supplied volume_mode=%d\n",
6946 volume_mode);
6947 }
6948
6949 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
6950 "mute is supported, volume control is %s\n",
6951 str_supported(!tp_features.mixer_no_level_control));
6952
6953 rc = volume_create_alsa_mixer();
6954 if (rc) {
6955 pr_err("Could not create the ALSA mixer interface\n");
6956 return rc;
6957 }
6958
6959 pr_info("Console audio control enabled, mode: %s\n",
6960 (volume_control_allowed) ?
6961 "override (read/write)" :
6962 "monitor (read only)");
6963
6964 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
6965 "registering volume hotkeys as change notification\n");
6966 tpacpi_hotkey_driver_mask_set(hotkey_driver_mask
6967 | TP_ACPI_HKEY_VOLUP_MASK
6968 | TP_ACPI_HKEY_VOLDWN_MASK
6969 | TP_ACPI_HKEY_MUTE_MASK);
6970
6971 return 0;
6972 }
6973
6974 static int volume_read(struct seq_file *m)
6975 {
6976 u8 status;
6977
6978 if (volume_get_status(&status) < 0) {
6979 seq_printf(m, "level:\t\tunreadable\n");
6980 } else {
6981 if (tp_features.mixer_no_level_control)
6982 seq_printf(m, "level:\t\tunsupported\n");
6983 else
6984 seq_printf(m, "level:\t\t%d\n",
6985 status & TP_EC_AUDIO_LVL_MSK);
6986
6987 seq_printf(m, "mute:\t\t%s\n",
6988 onoff(status, TP_EC_AUDIO_MUTESW));
6989
6990 if (volume_control_allowed) {
6991 seq_printf(m, "commands:\tunmute, mute\n");
6992 if (!tp_features.mixer_no_level_control) {
6993 seq_printf(m,
6994 "commands:\tup, down\n");
6995 seq_printf(m,
6996 "commands:\tlevel <level>"
6997 " (<level> is 0-%d)\n",
6998 TP_EC_VOLUME_MAX);
6999 }
7000 }
7001 }
7002
7003 return 0;
7004 }
7005
7006 static int volume_write(char *buf)
7007 {
7008 u8 s;
7009 u8 new_level, new_mute;
7010 int l;
7011 char *cmd;
7012 int rc;
7013
7014 /*
7015 * We do allow volume control at driver startup, so that the
7016 * user can set initial state through the volume=... parameter hack.
7017 */
7018 if (!volume_control_allowed && tpacpi_lifecycle != TPACPI_LIFE_INIT) {
7019 if (unlikely(!tp_warned.volume_ctrl_forbidden)) {
7020 tp_warned.volume_ctrl_forbidden = 1;
7021 pr_notice("Console audio control in monitor mode, "
7022 "changes are not allowed\n");
7023 pr_notice("Use the volume_control=1 module parameter "
7024 "to enable volume control\n");
7025 }
7026 return -EPERM;
7027 }
7028
7029 rc = volume_get_status(&s);
7030 if (rc < 0)
7031 return rc;
7032
7033 new_level = s & TP_EC_AUDIO_LVL_MSK;
7034 new_mute = s & TP_EC_AUDIO_MUTESW_MSK;
7035
7036 while ((cmd = next_cmd(&buf))) {
7037 if (!tp_features.mixer_no_level_control) {
7038 if (strlencmp(cmd, "up") == 0) {
7039 if (new_mute)
7040 new_mute = 0;
7041 else if (new_level < TP_EC_VOLUME_MAX)
7042 new_level++;
7043 continue;
7044 } else if (strlencmp(cmd, "down") == 0) {
7045 if (new_mute)
7046 new_mute = 0;
7047 else if (new_level > 0)
7048 new_level--;
7049 continue;
7050 } else if (sscanf(cmd, "level %u", &l) == 1 &&
7051 l >= 0 && l <= TP_EC_VOLUME_MAX) {
7052 new_level = l;
7053 continue;
7054 }
7055 }
7056 if (strlencmp(cmd, "mute") == 0)
7057 new_mute = TP_EC_AUDIO_MUTESW_MSK;
7058 else if (strlencmp(cmd, "unmute") == 0)
7059 new_mute = 0;
7060 else
7061 return -EINVAL;
7062 }
7063
7064 if (tp_features.mixer_no_level_control) {
7065 tpacpi_disclose_usertask("procfs volume", "%smute\n",
7066 new_mute ? "" : "un");
7067 rc = volume_set_mute(!!new_mute);
7068 } else {
7069 tpacpi_disclose_usertask("procfs volume",
7070 "%smute and set level to %d\n",
7071 new_mute ? "" : "un", new_level);
7072 rc = volume_set_status(new_mute | new_level);
7073 }
7074 volume_alsa_notify_change();
7075
7076 return (rc == -EINTR) ? -ERESTARTSYS : rc;
7077 }
7078
7079 static struct ibm_struct volume_driver_data = {
7080 .name = "volume",
7081 .read = volume_read,
7082 .write = volume_write,
7083 .exit = volume_exit,
7084 .suspend = volume_suspend,
7085 .resume = volume_resume,
7086 .shutdown = volume_shutdown,
7087 };
7088
7089 #else /* !CONFIG_THINKPAD_ACPI_ALSA_SUPPORT */
7090
7091 #define alsa_card NULL
7092
7093 static void inline volume_alsa_notify_change(void)
7094 {
7095 }
7096
7097 static int __init volume_init(struct ibm_init_struct *iibm)
7098 {
7099 pr_info("volume: disabled as there is no ALSA support in this kernel\n");
7100
7101 return 1;
7102 }
7103
7104 static struct ibm_struct volume_driver_data = {
7105 .name = "volume",
7106 };
7107
7108 #endif /* CONFIG_THINKPAD_ACPI_ALSA_SUPPORT */
7109
7110 /*************************************************************************
7111 * Fan subdriver
7112 */
7113
7114 /*
7115 * FAN ACCESS MODES
7116 *
7117 * TPACPI_FAN_RD_ACPI_GFAN:
7118 * ACPI GFAN method: returns fan level
7119 *
7120 * see TPACPI_FAN_WR_ACPI_SFAN
7121 * EC 0x2f (HFSP) not available if GFAN exists
7122 *
7123 * TPACPI_FAN_WR_ACPI_SFAN:
7124 * ACPI SFAN method: sets fan level, 0 (stop) to 7 (max)
7125 *
7126 * EC 0x2f (HFSP) might be available *for reading*, but do not use
7127 * it for writing.
7128 *
7129 * TPACPI_FAN_WR_TPEC:
7130 * ThinkPad EC register 0x2f (HFSP): fan control loop mode
7131 * Supported on almost all ThinkPads
7132 *
7133 * Fan speed changes of any sort (including those caused by the
7134 * disengaged mode) are usually done slowly by the firmware as the
7135 * maximum amount of fan duty cycle change per second seems to be
7136 * limited.
7137 *
7138 * Reading is not available if GFAN exists.
7139 * Writing is not available if SFAN exists.
7140 *
7141 * Bits
7142 * 7 automatic mode engaged;
7143 * (default operation mode of the ThinkPad)
7144 * fan level is ignored in this mode.
7145 * 6 full speed mode (takes precedence over bit 7);
7146 * not available on all thinkpads. May disable
7147 * the tachometer while the fan controller ramps up
7148 * the speed (which can take up to a few *minutes*).
7149 * Speeds up fan to 100% duty-cycle, which is far above
7150 * the standard RPM levels. It is not impossible that
7151 * it could cause hardware damage.
7152 * 5-3 unused in some models. Extra bits for fan level
7153 * in others, but still useless as all values above
7154 * 7 map to the same speed as level 7 in these models.
7155 * 2-0 fan level (0..7 usually)
7156 * 0x00 = stop
7157 * 0x07 = max (set when temperatures critical)
7158 * Some ThinkPads may have other levels, see
7159 * TPACPI_FAN_WR_ACPI_FANS (X31/X40/X41)
7160 *
7161 * FIRMWARE BUG: on some models, EC 0x2f might not be initialized at
7162 * boot. Apparently the EC does not initialize it, so unless ACPI DSDT
7163 * does so, its initial value is meaningless (0x07).
7164 *
7165 * For firmware bugs, refer to:
7166 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
7167 *
7168 * ----
7169 *
7170 * ThinkPad EC register 0x84 (LSB), 0x85 (MSB):
7171 * Main fan tachometer reading (in RPM)
7172 *
7173 * This register is present on all ThinkPads with a new-style EC, and
7174 * it is known not to be present on the A21m/e, and T22, as there is
7175 * something else in offset 0x84 according to the ACPI DSDT. Other
7176 * ThinkPads from this same time period (and earlier) probably lack the
7177 * tachometer as well.
7178 *
7179 * Unfortunately a lot of ThinkPads with new-style ECs but whose firmware
7180 * was never fixed by IBM to report the EC firmware version string
7181 * probably support the tachometer (like the early X models), so
7182 * detecting it is quite hard. We need more data to know for sure.
7183 *
7184 * FIRMWARE BUG: always read 0x84 first, otherwise incorrect readings
7185 * might result.
7186 *
7187 * FIRMWARE BUG: may go stale while the EC is switching to full speed
7188 * mode.
7189 *
7190 * For firmware bugs, refer to:
7191 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
7192 *
7193 * ----
7194 *
7195 * ThinkPad EC register 0x31 bit 0 (only on select models)
7196 *
7197 * When bit 0 of EC register 0x31 is zero, the tachometer registers
7198 * show the speed of the main fan. When bit 0 of EC register 0x31
7199 * is one, the tachometer registers show the speed of the auxiliary
7200 * fan.
7201 *
7202 * Fan control seems to affect both fans, regardless of the state
7203 * of this bit.
7204 *
7205 * So far, only the firmware for the X60/X61 non-tablet versions
7206 * seem to support this (firmware TP-7M).
7207 *
7208 * TPACPI_FAN_WR_ACPI_FANS:
7209 * ThinkPad X31, X40, X41. Not available in the X60.
7210 *
7211 * FANS ACPI handle: takes three arguments: low speed, medium speed,
7212 * high speed. ACPI DSDT seems to map these three speeds to levels
7213 * as follows: STOP LOW LOW MED MED HIGH HIGH HIGH HIGH
7214 * (this map is stored on FAN0..FAN8 as "0,1,1,2,2,3,3,3,3")
7215 *
7216 * The speeds are stored on handles
7217 * (FANA:FAN9), (FANC:FANB), (FANE:FAND).
7218 *
7219 * There are three default speed sets, accessible as handles:
7220 * FS1L,FS1M,FS1H; FS2L,FS2M,FS2H; FS3L,FS3M,FS3H
7221 *
7222 * ACPI DSDT switches which set is in use depending on various
7223 * factors.
7224 *
7225 * TPACPI_FAN_WR_TPEC is also available and should be used to
7226 * command the fan. The X31/X40/X41 seems to have 8 fan levels,
7227 * but the ACPI tables just mention level 7.
7228 */
7229
7230 enum { /* Fan control constants */
7231 fan_status_offset = 0x2f, /* EC register 0x2f */
7232 fan_rpm_offset = 0x84, /* EC register 0x84: LSB, 0x85 MSB (RPM)
7233 * 0x84 must be read before 0x85 */
7234 fan_select_offset = 0x31, /* EC register 0x31 (Firmware 7M)
7235 bit 0 selects which fan is active */
7236
7237 TP_EC_FAN_FULLSPEED = 0x40, /* EC fan mode: full speed */
7238 TP_EC_FAN_AUTO = 0x80, /* EC fan mode: auto fan control */
7239
7240 TPACPI_FAN_LAST_LEVEL = 0x100, /* Use cached last-seen fan level */
7241 };
7242
7243 enum fan_status_access_mode {
7244 TPACPI_FAN_NONE = 0, /* No fan status or control */
7245 TPACPI_FAN_RD_ACPI_GFAN, /* Use ACPI GFAN */
7246 TPACPI_FAN_RD_TPEC, /* Use ACPI EC regs 0x2f, 0x84-0x85 */
7247 };
7248
7249 enum fan_control_access_mode {
7250 TPACPI_FAN_WR_NONE = 0, /* No fan control */
7251 TPACPI_FAN_WR_ACPI_SFAN, /* Use ACPI SFAN */
7252 TPACPI_FAN_WR_TPEC, /* Use ACPI EC reg 0x2f */
7253 TPACPI_FAN_WR_ACPI_FANS, /* Use ACPI FANS and EC reg 0x2f */
7254 };
7255
7256 enum fan_control_commands {
7257 TPACPI_FAN_CMD_SPEED = 0x0001, /* speed command */
7258 TPACPI_FAN_CMD_LEVEL = 0x0002, /* level command */
7259 TPACPI_FAN_CMD_ENABLE = 0x0004, /* enable/disable cmd,
7260 * and also watchdog cmd */
7261 };
7262
7263 static bool fan_control_allowed;
7264
7265 static enum fan_status_access_mode fan_status_access_mode;
7266 static enum fan_control_access_mode fan_control_access_mode;
7267 static enum fan_control_commands fan_control_commands;
7268
7269 static u8 fan_control_initial_status;
7270 static u8 fan_control_desired_level;
7271 static u8 fan_control_resume_level;
7272 static int fan_watchdog_maxinterval;
7273
7274 static struct mutex fan_mutex;
7275
7276 static void fan_watchdog_fire(struct work_struct *ignored);
7277 static DECLARE_DELAYED_WORK(fan_watchdog_task, fan_watchdog_fire);
7278
7279 TPACPI_HANDLE(fans, ec, "FANS"); /* X31, X40, X41 */
7280 TPACPI_HANDLE(gfan, ec, "GFAN", /* 570 */
7281 "\\FSPD", /* 600e/x, 770e, 770x */
7282 ); /* all others */
7283 TPACPI_HANDLE(sfan, ec, "SFAN", /* 570 */
7284 "JFNS", /* 770x-JL */
7285 ); /* all others */
7286
7287 /*
7288 * Unitialized HFSP quirk: ACPI DSDT and EC fail to initialize the
7289 * HFSP register at boot, so it contains 0x07 but the Thinkpad could
7290 * be in auto mode (0x80).
7291 *
7292 * This is corrected by any write to HFSP either by the driver, or
7293 * by the firmware.
7294 *
7295 * We assume 0x07 really means auto mode while this quirk is active,
7296 * as this is far more likely than the ThinkPad being in level 7,
7297 * which is only used by the firmware during thermal emergencies.
7298 *
7299 * Enable for TP-1Y (T43), TP-78 (R51e), TP-76 (R52),
7300 * TP-70 (T43, R52), which are known to be buggy.
7301 */
7302
7303 static void fan_quirk1_setup(void)
7304 {
7305 if (fan_control_initial_status == 0x07) {
7306 pr_notice("fan_init: initial fan status is unknown, "
7307 "assuming it is in auto mode\n");
7308 tp_features.fan_ctrl_status_undef = 1;
7309 }
7310 }
7311
7312 static void fan_quirk1_handle(u8 *fan_status)
7313 {
7314 if (unlikely(tp_features.fan_ctrl_status_undef)) {
7315 if (*fan_status != fan_control_initial_status) {
7316 /* something changed the HFSP regisnter since
7317 * driver init time, so it is not undefined
7318 * anymore */
7319 tp_features.fan_ctrl_status_undef = 0;
7320 } else {
7321 /* Return most likely status. In fact, it
7322 * might be the only possible status */
7323 *fan_status = TP_EC_FAN_AUTO;
7324 }
7325 }
7326 }
7327
7328 /* Select main fan on X60/X61, NOOP on others */
7329 static bool fan_select_fan1(void)
7330 {
7331 if (tp_features.second_fan) {
7332 u8 val;
7333
7334 if (ec_read(fan_select_offset, &val) < 0)
7335 return false;
7336 val &= 0xFEU;
7337 if (ec_write(fan_select_offset, val) < 0)
7338 return false;
7339 }
7340 return true;
7341 }
7342
7343 /* Select secondary fan on X60/X61 */
7344 static bool fan_select_fan2(void)
7345 {
7346 u8 val;
7347
7348 if (!tp_features.second_fan)
7349 return false;
7350
7351 if (ec_read(fan_select_offset, &val) < 0)
7352 return false;
7353 val |= 0x01U;
7354 if (ec_write(fan_select_offset, val) < 0)
7355 return false;
7356
7357 return true;
7358 }
7359
7360 /*
7361 * Call with fan_mutex held
7362 */
7363 static void fan_update_desired_level(u8 status)
7364 {
7365 if ((status &
7366 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
7367 if (status > 7)
7368 fan_control_desired_level = 7;
7369 else
7370 fan_control_desired_level = status;
7371 }
7372 }
7373
7374 static int fan_get_status(u8 *status)
7375 {
7376 u8 s;
7377
7378 /* TODO:
7379 * Add TPACPI_FAN_RD_ACPI_FANS ? */
7380
7381 switch (fan_status_access_mode) {
7382 case TPACPI_FAN_RD_ACPI_GFAN: {
7383 /* 570, 600e/x, 770e, 770x */
7384 int res;
7385
7386 if (unlikely(!acpi_evalf(gfan_handle, &res, NULL, "d")))
7387 return -EIO;
7388
7389 if (likely(status))
7390 *status = res & 0x07;
7391
7392 break;
7393 }
7394 case TPACPI_FAN_RD_TPEC:
7395 /* all except 570, 600e/x, 770e, 770x */
7396 if (unlikely(!acpi_ec_read(fan_status_offset, &s)))
7397 return -EIO;
7398
7399 if (likely(status)) {
7400 *status = s;
7401 fan_quirk1_handle(status);
7402 }
7403
7404 break;
7405
7406 default:
7407 return -ENXIO;
7408 }
7409
7410 return 0;
7411 }
7412
7413 static int fan_get_status_safe(u8 *status)
7414 {
7415 int rc;
7416 u8 s;
7417
7418 if (mutex_lock_killable(&fan_mutex))
7419 return -ERESTARTSYS;
7420 rc = fan_get_status(&s);
7421 if (!rc)
7422 fan_update_desired_level(s);
7423 mutex_unlock(&fan_mutex);
7424
7425 if (status)
7426 *status = s;
7427
7428 return rc;
7429 }
7430
7431 static int fan_get_speed(unsigned int *speed)
7432 {
7433 u8 hi, lo;
7434
7435 switch (fan_status_access_mode) {
7436 case TPACPI_FAN_RD_TPEC:
7437 /* all except 570, 600e/x, 770e, 770x */
7438 if (unlikely(!fan_select_fan1()))
7439 return -EIO;
7440 if (unlikely(!acpi_ec_read(fan_rpm_offset, &lo) ||
7441 !acpi_ec_read(fan_rpm_offset + 1, &hi)))
7442 return -EIO;
7443
7444 if (likely(speed))
7445 *speed = (hi << 8) | lo;
7446
7447 break;
7448
7449 default:
7450 return -ENXIO;
7451 }
7452
7453 return 0;
7454 }
7455
7456 static int fan2_get_speed(unsigned int *speed)
7457 {
7458 u8 hi, lo;
7459 bool rc;
7460
7461 switch (fan_status_access_mode) {
7462 case TPACPI_FAN_RD_TPEC:
7463 /* all except 570, 600e/x, 770e, 770x */
7464 if (unlikely(!fan_select_fan2()))
7465 return -EIO;
7466 rc = !acpi_ec_read(fan_rpm_offset, &lo) ||
7467 !acpi_ec_read(fan_rpm_offset + 1, &hi);
7468 fan_select_fan1(); /* play it safe */
7469 if (rc)
7470 return -EIO;
7471
7472 if (likely(speed))
7473 *speed = (hi << 8) | lo;
7474
7475 break;
7476
7477 default:
7478 return -ENXIO;
7479 }
7480
7481 return 0;
7482 }
7483
7484 static int fan_set_level(int level)
7485 {
7486 if (!fan_control_allowed)
7487 return -EPERM;
7488
7489 switch (fan_control_access_mode) {
7490 case TPACPI_FAN_WR_ACPI_SFAN:
7491 if (level >= 0 && level <= 7) {
7492 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", level))
7493 return -EIO;
7494 } else
7495 return -EINVAL;
7496 break;
7497
7498 case TPACPI_FAN_WR_ACPI_FANS:
7499 case TPACPI_FAN_WR_TPEC:
7500 if (!(level & TP_EC_FAN_AUTO) &&
7501 !(level & TP_EC_FAN_FULLSPEED) &&
7502 ((level < 0) || (level > 7)))
7503 return -EINVAL;
7504
7505 /* safety net should the EC not support AUTO
7506 * or FULLSPEED mode bits and just ignore them */
7507 if (level & TP_EC_FAN_FULLSPEED)
7508 level |= 7; /* safety min speed 7 */
7509 else if (level & TP_EC_FAN_AUTO)
7510 level |= 4; /* safety min speed 4 */
7511
7512 if (!acpi_ec_write(fan_status_offset, level))
7513 return -EIO;
7514 else
7515 tp_features.fan_ctrl_status_undef = 0;
7516 break;
7517
7518 default:
7519 return -ENXIO;
7520 }
7521
7522 vdbg_printk(TPACPI_DBG_FAN,
7523 "fan control: set fan control register to 0x%02x\n", level);
7524 return 0;
7525 }
7526
7527 static int fan_set_level_safe(int level)
7528 {
7529 int rc;
7530
7531 if (!fan_control_allowed)
7532 return -EPERM;
7533
7534 if (mutex_lock_killable(&fan_mutex))
7535 return -ERESTARTSYS;
7536
7537 if (level == TPACPI_FAN_LAST_LEVEL)
7538 level = fan_control_desired_level;
7539
7540 rc = fan_set_level(level);
7541 if (!rc)
7542 fan_update_desired_level(level);
7543
7544 mutex_unlock(&fan_mutex);
7545 return rc;
7546 }
7547
7548 static int fan_set_enable(void)
7549 {
7550 u8 s;
7551 int rc;
7552
7553 if (!fan_control_allowed)
7554 return -EPERM;
7555
7556 if (mutex_lock_killable(&fan_mutex))
7557 return -ERESTARTSYS;
7558
7559 switch (fan_control_access_mode) {
7560 case TPACPI_FAN_WR_ACPI_FANS:
7561 case TPACPI_FAN_WR_TPEC:
7562 rc = fan_get_status(&s);
7563 if (rc < 0)
7564 break;
7565
7566 /* Don't go out of emergency fan mode */
7567 if (s != 7) {
7568 s &= 0x07;
7569 s |= TP_EC_FAN_AUTO | 4; /* min fan speed 4 */
7570 }
7571
7572 if (!acpi_ec_write(fan_status_offset, s))
7573 rc = -EIO;
7574 else {
7575 tp_features.fan_ctrl_status_undef = 0;
7576 rc = 0;
7577 }
7578 break;
7579
7580 case TPACPI_FAN_WR_ACPI_SFAN:
7581 rc = fan_get_status(&s);
7582 if (rc < 0)
7583 break;
7584
7585 s &= 0x07;
7586
7587 /* Set fan to at least level 4 */
7588 s |= 4;
7589
7590 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", s))
7591 rc = -EIO;
7592 else
7593 rc = 0;
7594 break;
7595
7596 default:
7597 rc = -ENXIO;
7598 }
7599
7600 mutex_unlock(&fan_mutex);
7601
7602 if (!rc)
7603 vdbg_printk(TPACPI_DBG_FAN,
7604 "fan control: set fan control register to 0x%02x\n",
7605 s);
7606 return rc;
7607 }
7608
7609 static int fan_set_disable(void)
7610 {
7611 int rc;
7612
7613 if (!fan_control_allowed)
7614 return -EPERM;
7615
7616 if (mutex_lock_killable(&fan_mutex))
7617 return -ERESTARTSYS;
7618
7619 rc = 0;
7620 switch (fan_control_access_mode) {
7621 case TPACPI_FAN_WR_ACPI_FANS:
7622 case TPACPI_FAN_WR_TPEC:
7623 if (!acpi_ec_write(fan_status_offset, 0x00))
7624 rc = -EIO;
7625 else {
7626 fan_control_desired_level = 0;
7627 tp_features.fan_ctrl_status_undef = 0;
7628 }
7629 break;
7630
7631 case TPACPI_FAN_WR_ACPI_SFAN:
7632 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", 0x00))
7633 rc = -EIO;
7634 else
7635 fan_control_desired_level = 0;
7636 break;
7637
7638 default:
7639 rc = -ENXIO;
7640 }
7641
7642 if (!rc)
7643 vdbg_printk(TPACPI_DBG_FAN,
7644 "fan control: set fan control register to 0\n");
7645
7646 mutex_unlock(&fan_mutex);
7647 return rc;
7648 }
7649
7650 static int fan_set_speed(int speed)
7651 {
7652 int rc;
7653
7654 if (!fan_control_allowed)
7655 return -EPERM;
7656
7657 if (mutex_lock_killable(&fan_mutex))
7658 return -ERESTARTSYS;
7659
7660 rc = 0;
7661 switch (fan_control_access_mode) {
7662 case TPACPI_FAN_WR_ACPI_FANS:
7663 if (speed >= 0 && speed <= 65535) {
7664 if (!acpi_evalf(fans_handle, NULL, NULL, "vddd",
7665 speed, speed, speed))
7666 rc = -EIO;
7667 } else
7668 rc = -EINVAL;
7669 break;
7670
7671 default:
7672 rc = -ENXIO;
7673 }
7674
7675 mutex_unlock(&fan_mutex);
7676 return rc;
7677 }
7678
7679 static void fan_watchdog_reset(void)
7680 {
7681 if (fan_control_access_mode == TPACPI_FAN_WR_NONE)
7682 return;
7683
7684 if (fan_watchdog_maxinterval > 0 &&
7685 tpacpi_lifecycle != TPACPI_LIFE_EXITING)
7686 mod_delayed_work(tpacpi_wq, &fan_watchdog_task,
7687 msecs_to_jiffies(fan_watchdog_maxinterval * 1000));
7688 else
7689 cancel_delayed_work(&fan_watchdog_task);
7690 }
7691
7692 static void fan_watchdog_fire(struct work_struct *ignored)
7693 {
7694 int rc;
7695
7696 if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
7697 return;
7698
7699 pr_notice("fan watchdog: enabling fan\n");
7700 rc = fan_set_enable();
7701 if (rc < 0) {
7702 pr_err("fan watchdog: error %d while enabling fan, "
7703 "will try again later...\n", -rc);
7704 /* reschedule for later */
7705 fan_watchdog_reset();
7706 }
7707 }
7708
7709 /*
7710 * SYSFS fan layout: hwmon compatible (device)
7711 *
7712 * pwm*_enable:
7713 * 0: "disengaged" mode
7714 * 1: manual mode
7715 * 2: native EC "auto" mode (recommended, hardware default)
7716 *
7717 * pwm*: set speed in manual mode, ignored otherwise.
7718 * 0 is level 0; 255 is level 7. Intermediate points done with linear
7719 * interpolation.
7720 *
7721 * fan*_input: tachometer reading, RPM
7722 *
7723 *
7724 * SYSFS fan layout: extensions
7725 *
7726 * fan_watchdog (driver):
7727 * fan watchdog interval in seconds, 0 disables (default), max 120
7728 */
7729
7730 /* sysfs fan pwm1_enable ----------------------------------------------- */
7731 static ssize_t fan_pwm1_enable_show(struct device *dev,
7732 struct device_attribute *attr,
7733 char *buf)
7734 {
7735 int res, mode;
7736 u8 status;
7737
7738 res = fan_get_status_safe(&status);
7739 if (res)
7740 return res;
7741
7742 if (status & TP_EC_FAN_FULLSPEED) {
7743 mode = 0;
7744 } else if (status & TP_EC_FAN_AUTO) {
7745 mode = 2;
7746 } else
7747 mode = 1;
7748
7749 return snprintf(buf, PAGE_SIZE, "%d\n", mode);
7750 }
7751
7752 static ssize_t fan_pwm1_enable_store(struct device *dev,
7753 struct device_attribute *attr,
7754 const char *buf, size_t count)
7755 {
7756 unsigned long t;
7757 int res, level;
7758
7759 if (parse_strtoul(buf, 2, &t))
7760 return -EINVAL;
7761
7762 tpacpi_disclose_usertask("hwmon pwm1_enable",
7763 "set fan mode to %lu\n", t);
7764
7765 switch (t) {
7766 case 0:
7767 level = TP_EC_FAN_FULLSPEED;
7768 break;
7769 case 1:
7770 level = TPACPI_FAN_LAST_LEVEL;
7771 break;
7772 case 2:
7773 level = TP_EC_FAN_AUTO;
7774 break;
7775 case 3:
7776 /* reserved for software-controlled auto mode */
7777 return -ENOSYS;
7778 default:
7779 return -EINVAL;
7780 }
7781
7782 res = fan_set_level_safe(level);
7783 if (res == -ENXIO)
7784 return -EINVAL;
7785 else if (res < 0)
7786 return res;
7787
7788 fan_watchdog_reset();
7789
7790 return count;
7791 }
7792
7793 static struct device_attribute dev_attr_fan_pwm1_enable =
7794 __ATTR(pwm1_enable, S_IWUSR | S_IRUGO,
7795 fan_pwm1_enable_show, fan_pwm1_enable_store);
7796
7797 /* sysfs fan pwm1 ------------------------------------------------------ */
7798 static ssize_t fan_pwm1_show(struct device *dev,
7799 struct device_attribute *attr,
7800 char *buf)
7801 {
7802 int res;
7803 u8 status;
7804
7805 res = fan_get_status_safe(&status);
7806 if (res)
7807 return res;
7808
7809 if ((status &
7810 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) != 0)
7811 status = fan_control_desired_level;
7812
7813 if (status > 7)
7814 status = 7;
7815
7816 return snprintf(buf, PAGE_SIZE, "%u\n", (status * 255) / 7);
7817 }
7818
7819 static ssize_t fan_pwm1_store(struct device *dev,
7820 struct device_attribute *attr,
7821 const char *buf, size_t count)
7822 {
7823 unsigned long s;
7824 int rc;
7825 u8 status, newlevel;
7826
7827 if (parse_strtoul(buf, 255, &s))
7828 return -EINVAL;
7829
7830 tpacpi_disclose_usertask("hwmon pwm1",
7831 "set fan speed to %lu\n", s);
7832
7833 /* scale down from 0-255 to 0-7 */
7834 newlevel = (s >> 5) & 0x07;
7835
7836 if (mutex_lock_killable(&fan_mutex))
7837 return -ERESTARTSYS;
7838
7839 rc = fan_get_status(&status);
7840 if (!rc && (status &
7841 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
7842 rc = fan_set_level(newlevel);
7843 if (rc == -ENXIO)
7844 rc = -EINVAL;
7845 else if (!rc) {
7846 fan_update_desired_level(newlevel);
7847 fan_watchdog_reset();
7848 }
7849 }
7850
7851 mutex_unlock(&fan_mutex);
7852 return (rc)? rc : count;
7853 }
7854
7855 static struct device_attribute dev_attr_fan_pwm1 =
7856 __ATTR(pwm1, S_IWUSR | S_IRUGO,
7857 fan_pwm1_show, fan_pwm1_store);
7858
7859 /* sysfs fan fan1_input ------------------------------------------------ */
7860 static ssize_t fan_fan1_input_show(struct device *dev,
7861 struct device_attribute *attr,
7862 char *buf)
7863 {
7864 int res;
7865 unsigned int speed;
7866
7867 res = fan_get_speed(&speed);
7868 if (res < 0)
7869 return res;
7870
7871 return snprintf(buf, PAGE_SIZE, "%u\n", speed);
7872 }
7873
7874 static struct device_attribute dev_attr_fan_fan1_input =
7875 __ATTR(fan1_input, S_IRUGO,
7876 fan_fan1_input_show, NULL);
7877
7878 /* sysfs fan fan2_input ------------------------------------------------ */
7879 static ssize_t fan_fan2_input_show(struct device *dev,
7880 struct device_attribute *attr,
7881 char *buf)
7882 {
7883 int res;
7884 unsigned int speed;
7885
7886 res = fan2_get_speed(&speed);
7887 if (res < 0)
7888 return res;
7889
7890 return snprintf(buf, PAGE_SIZE, "%u\n", speed);
7891 }
7892
7893 static struct device_attribute dev_attr_fan_fan2_input =
7894 __ATTR(fan2_input, S_IRUGO,
7895 fan_fan2_input_show, NULL);
7896
7897 /* sysfs fan fan_watchdog (hwmon driver) ------------------------------- */
7898 static ssize_t fan_fan_watchdog_show(struct device_driver *drv,
7899 char *buf)
7900 {
7901 return snprintf(buf, PAGE_SIZE, "%u\n", fan_watchdog_maxinterval);
7902 }
7903
7904 static ssize_t fan_fan_watchdog_store(struct device_driver *drv,
7905 const char *buf, size_t count)
7906 {
7907 unsigned long t;
7908
7909 if (parse_strtoul(buf, 120, &t))
7910 return -EINVAL;
7911
7912 if (!fan_control_allowed)
7913 return -EPERM;
7914
7915 fan_watchdog_maxinterval = t;
7916 fan_watchdog_reset();
7917
7918 tpacpi_disclose_usertask("fan_watchdog", "set to %lu\n", t);
7919
7920 return count;
7921 }
7922
7923 static DRIVER_ATTR(fan_watchdog, S_IWUSR | S_IRUGO,
7924 fan_fan_watchdog_show, fan_fan_watchdog_store);
7925
7926 /* --------------------------------------------------------------------- */
7927 static struct attribute *fan_attributes[] = {
7928 &dev_attr_fan_pwm1_enable.attr, &dev_attr_fan_pwm1.attr,
7929 &dev_attr_fan_fan1_input.attr,
7930 NULL, /* for fan2_input */
7931 NULL
7932 };
7933
7934 static const struct attribute_group fan_attr_group = {
7935 .attrs = fan_attributes,
7936 };
7937
7938 #define TPACPI_FAN_Q1 0x0001 /* Unitialized HFSP */
7939 #define TPACPI_FAN_2FAN 0x0002 /* EC 0x31 bit 0 selects fan2 */
7940
7941 #define TPACPI_FAN_QI(__id1, __id2, __quirks) \
7942 { .vendor = PCI_VENDOR_ID_IBM, \
7943 .bios = TPACPI_MATCH_ANY, \
7944 .ec = TPID(__id1, __id2), \
7945 .quirks = __quirks }
7946
7947 #define TPACPI_FAN_QL(__id1, __id2, __quirks) \
7948 { .vendor = PCI_VENDOR_ID_LENOVO, \
7949 .bios = TPACPI_MATCH_ANY, \
7950 .ec = TPID(__id1, __id2), \
7951 .quirks = __quirks }
7952
7953 static const struct tpacpi_quirk fan_quirk_table[] __initconst = {
7954 TPACPI_FAN_QI('1', 'Y', TPACPI_FAN_Q1),
7955 TPACPI_FAN_QI('7', '8', TPACPI_FAN_Q1),
7956 TPACPI_FAN_QI('7', '6', TPACPI_FAN_Q1),
7957 TPACPI_FAN_QI('7', '0', TPACPI_FAN_Q1),
7958 TPACPI_FAN_QL('7', 'M', TPACPI_FAN_2FAN),
7959 };
7960
7961 #undef TPACPI_FAN_QL
7962 #undef TPACPI_FAN_QI
7963
7964 static int __init fan_init(struct ibm_init_struct *iibm)
7965 {
7966 int rc;
7967 unsigned long quirks;
7968
7969 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
7970 "initializing fan subdriver\n");
7971
7972 mutex_init(&fan_mutex);
7973 fan_status_access_mode = TPACPI_FAN_NONE;
7974 fan_control_access_mode = TPACPI_FAN_WR_NONE;
7975 fan_control_commands = 0;
7976 fan_watchdog_maxinterval = 0;
7977 tp_features.fan_ctrl_status_undef = 0;
7978 tp_features.second_fan = 0;
7979 fan_control_desired_level = 7;
7980
7981 if (tpacpi_is_ibm()) {
7982 TPACPI_ACPIHANDLE_INIT(fans);
7983 TPACPI_ACPIHANDLE_INIT(gfan);
7984 TPACPI_ACPIHANDLE_INIT(sfan);
7985 }
7986
7987 quirks = tpacpi_check_quirks(fan_quirk_table,
7988 ARRAY_SIZE(fan_quirk_table));
7989
7990 if (gfan_handle) {
7991 /* 570, 600e/x, 770e, 770x */
7992 fan_status_access_mode = TPACPI_FAN_RD_ACPI_GFAN;
7993 } else {
7994 /* all other ThinkPads: note that even old-style
7995 * ThinkPad ECs supports the fan control register */
7996 if (likely(acpi_ec_read(fan_status_offset,
7997 &fan_control_initial_status))) {
7998 fan_status_access_mode = TPACPI_FAN_RD_TPEC;
7999 if (quirks & TPACPI_FAN_Q1)
8000 fan_quirk1_setup();
8001 if (quirks & TPACPI_FAN_2FAN) {
8002 tp_features.second_fan = 1;
8003 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
8004 "secondary fan support enabled\n");
8005 }
8006 } else {
8007 pr_err("ThinkPad ACPI EC access misbehaving, "
8008 "fan status and control unavailable\n");
8009 return 1;
8010 }
8011 }
8012
8013 if (sfan_handle) {
8014 /* 570, 770x-JL */
8015 fan_control_access_mode = TPACPI_FAN_WR_ACPI_SFAN;
8016 fan_control_commands |=
8017 TPACPI_FAN_CMD_LEVEL | TPACPI_FAN_CMD_ENABLE;
8018 } else {
8019 if (!gfan_handle) {
8020 /* gfan without sfan means no fan control */
8021 /* all other models implement TP EC 0x2f control */
8022
8023 if (fans_handle) {
8024 /* X31, X40, X41 */
8025 fan_control_access_mode =
8026 TPACPI_FAN_WR_ACPI_FANS;
8027 fan_control_commands |=
8028 TPACPI_FAN_CMD_SPEED |
8029 TPACPI_FAN_CMD_LEVEL |
8030 TPACPI_FAN_CMD_ENABLE;
8031 } else {
8032 fan_control_access_mode = TPACPI_FAN_WR_TPEC;
8033 fan_control_commands |=
8034 TPACPI_FAN_CMD_LEVEL |
8035 TPACPI_FAN_CMD_ENABLE;
8036 }
8037 }
8038 }
8039
8040 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
8041 "fan is %s, modes %d, %d\n",
8042 str_supported(fan_status_access_mode != TPACPI_FAN_NONE ||
8043 fan_control_access_mode != TPACPI_FAN_WR_NONE),
8044 fan_status_access_mode, fan_control_access_mode);
8045
8046 /* fan control master switch */
8047 if (!fan_control_allowed) {
8048 fan_control_access_mode = TPACPI_FAN_WR_NONE;
8049 fan_control_commands = 0;
8050 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
8051 "fan control features disabled by parameter\n");
8052 }
8053
8054 /* update fan_control_desired_level */
8055 if (fan_status_access_mode != TPACPI_FAN_NONE)
8056 fan_get_status_safe(NULL);
8057
8058 if (fan_status_access_mode != TPACPI_FAN_NONE ||
8059 fan_control_access_mode != TPACPI_FAN_WR_NONE) {
8060 if (tp_features.second_fan) {
8061 /* attach second fan tachometer */
8062 fan_attributes[ARRAY_SIZE(fan_attributes)-2] =
8063 &dev_attr_fan_fan2_input.attr;
8064 }
8065 rc = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
8066 &fan_attr_group);
8067 if (rc < 0)
8068 return rc;
8069
8070 rc = driver_create_file(&tpacpi_hwmon_pdriver.driver,
8071 &driver_attr_fan_watchdog);
8072 if (rc < 0) {
8073 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
8074 &fan_attr_group);
8075 return rc;
8076 }
8077 return 0;
8078 } else
8079 return 1;
8080 }
8081
8082 static void fan_exit(void)
8083 {
8084 vdbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_FAN,
8085 "cancelling any pending fan watchdog tasks\n");
8086
8087 /* FIXME: can we really do this unconditionally? */
8088 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj, &fan_attr_group);
8089 driver_remove_file(&tpacpi_hwmon_pdriver.driver,
8090 &driver_attr_fan_watchdog);
8091
8092 cancel_delayed_work(&fan_watchdog_task);
8093 flush_workqueue(tpacpi_wq);
8094 }
8095
8096 static void fan_suspend(void)
8097 {
8098 int rc;
8099
8100 if (!fan_control_allowed)
8101 return;
8102
8103 /* Store fan status in cache */
8104 fan_control_resume_level = 0;
8105 rc = fan_get_status_safe(&fan_control_resume_level);
8106 if (rc < 0)
8107 pr_notice("failed to read fan level for later "
8108 "restore during resume: %d\n", rc);
8109
8110 /* if it is undefined, don't attempt to restore it.
8111 * KEEP THIS LAST */
8112 if (tp_features.fan_ctrl_status_undef)
8113 fan_control_resume_level = 0;
8114 }
8115
8116 static void fan_resume(void)
8117 {
8118 u8 current_level = 7;
8119 bool do_set = false;
8120 int rc;
8121
8122 /* DSDT *always* updates status on resume */
8123 tp_features.fan_ctrl_status_undef = 0;
8124
8125 if (!fan_control_allowed ||
8126 !fan_control_resume_level ||
8127 (fan_get_status_safe(&current_level) < 0))
8128 return;
8129
8130 switch (fan_control_access_mode) {
8131 case TPACPI_FAN_WR_ACPI_SFAN:
8132 /* never decrease fan level */
8133 do_set = (fan_control_resume_level > current_level);
8134 break;
8135 case TPACPI_FAN_WR_ACPI_FANS:
8136 case TPACPI_FAN_WR_TPEC:
8137 /* never decrease fan level, scale is:
8138 * TP_EC_FAN_FULLSPEED > 7 >= TP_EC_FAN_AUTO
8139 *
8140 * We expect the firmware to set either 7 or AUTO, but we
8141 * handle FULLSPEED out of paranoia.
8142 *
8143 * So, we can safely only restore FULLSPEED or 7, anything
8144 * else could slow the fan. Restoring AUTO is useless, at
8145 * best that's exactly what the DSDT already set (it is the
8146 * slower it uses).
8147 *
8148 * Always keep in mind that the DSDT *will* have set the
8149 * fans to what the vendor supposes is the best level. We
8150 * muck with it only to speed the fan up.
8151 */
8152 if (fan_control_resume_level != 7 &&
8153 !(fan_control_resume_level & TP_EC_FAN_FULLSPEED))
8154 return;
8155 else
8156 do_set = !(current_level & TP_EC_FAN_FULLSPEED) &&
8157 (current_level != fan_control_resume_level);
8158 break;
8159 default:
8160 return;
8161 }
8162 if (do_set) {
8163 pr_notice("restoring fan level to 0x%02x\n",
8164 fan_control_resume_level);
8165 rc = fan_set_level_safe(fan_control_resume_level);
8166 if (rc < 0)
8167 pr_notice("failed to restore fan level: %d\n", rc);
8168 }
8169 }
8170
8171 static int fan_read(struct seq_file *m)
8172 {
8173 int rc;
8174 u8 status;
8175 unsigned int speed = 0;
8176
8177 switch (fan_status_access_mode) {
8178 case TPACPI_FAN_RD_ACPI_GFAN:
8179 /* 570, 600e/x, 770e, 770x */
8180 rc = fan_get_status_safe(&status);
8181 if (rc < 0)
8182 return rc;
8183
8184 seq_printf(m, "status:\t\t%s\n"
8185 "level:\t\t%d\n",
8186 (status != 0) ? "enabled" : "disabled", status);
8187 break;
8188
8189 case TPACPI_FAN_RD_TPEC:
8190 /* all except 570, 600e/x, 770e, 770x */
8191 rc = fan_get_status_safe(&status);
8192 if (rc < 0)
8193 return rc;
8194
8195 seq_printf(m, "status:\t\t%s\n",
8196 (status != 0) ? "enabled" : "disabled");
8197
8198 rc = fan_get_speed(&speed);
8199 if (rc < 0)
8200 return rc;
8201
8202 seq_printf(m, "speed:\t\t%d\n", speed);
8203
8204 if (status & TP_EC_FAN_FULLSPEED)
8205 /* Disengaged mode takes precedence */
8206 seq_printf(m, "level:\t\tdisengaged\n");
8207 else if (status & TP_EC_FAN_AUTO)
8208 seq_printf(m, "level:\t\tauto\n");
8209 else
8210 seq_printf(m, "level:\t\t%d\n", status);
8211 break;
8212
8213 case TPACPI_FAN_NONE:
8214 default:
8215 seq_printf(m, "status:\t\tnot supported\n");
8216 }
8217
8218 if (fan_control_commands & TPACPI_FAN_CMD_LEVEL) {
8219 seq_printf(m, "commands:\tlevel <level>");
8220
8221 switch (fan_control_access_mode) {
8222 case TPACPI_FAN_WR_ACPI_SFAN:
8223 seq_printf(m, " (<level> is 0-7)\n");
8224 break;
8225
8226 default:
8227 seq_printf(m, " (<level> is 0-7, "
8228 "auto, disengaged, full-speed)\n");
8229 break;
8230 }
8231 }
8232
8233 if (fan_control_commands & TPACPI_FAN_CMD_ENABLE)
8234 seq_printf(m, "commands:\tenable, disable\n"
8235 "commands:\twatchdog <timeout> (<timeout> "
8236 "is 0 (off), 1-120 (seconds))\n");
8237
8238 if (fan_control_commands & TPACPI_FAN_CMD_SPEED)
8239 seq_printf(m, "commands:\tspeed <speed>"
8240 " (<speed> is 0-65535)\n");
8241
8242 return 0;
8243 }
8244
8245 static int fan_write_cmd_level(const char *cmd, int *rc)
8246 {
8247 int level;
8248
8249 if (strlencmp(cmd, "level auto") == 0)
8250 level = TP_EC_FAN_AUTO;
8251 else if ((strlencmp(cmd, "level disengaged") == 0) |
8252 (strlencmp(cmd, "level full-speed") == 0))
8253 level = TP_EC_FAN_FULLSPEED;
8254 else if (sscanf(cmd, "level %d", &level) != 1)
8255 return 0;
8256
8257 *rc = fan_set_level_safe(level);
8258 if (*rc == -ENXIO)
8259 pr_err("level command accepted for unsupported access mode %d\n",
8260 fan_control_access_mode);
8261 else if (!*rc)
8262 tpacpi_disclose_usertask("procfs fan",
8263 "set level to %d\n", level);
8264
8265 return 1;
8266 }
8267
8268 static int fan_write_cmd_enable(const char *cmd, int *rc)
8269 {
8270 if (strlencmp(cmd, "enable") != 0)
8271 return 0;
8272
8273 *rc = fan_set_enable();
8274 if (*rc == -ENXIO)
8275 pr_err("enable command accepted for unsupported access mode %d\n",
8276 fan_control_access_mode);
8277 else if (!*rc)
8278 tpacpi_disclose_usertask("procfs fan", "enable\n");
8279
8280 return 1;
8281 }
8282
8283 static int fan_write_cmd_disable(const char *cmd, int *rc)
8284 {
8285 if (strlencmp(cmd, "disable") != 0)
8286 return 0;
8287
8288 *rc = fan_set_disable();
8289 if (*rc == -ENXIO)
8290 pr_err("disable command accepted for unsupported access mode %d\n",
8291 fan_control_access_mode);
8292 else if (!*rc)
8293 tpacpi_disclose_usertask("procfs fan", "disable\n");
8294
8295 return 1;
8296 }
8297
8298 static int fan_write_cmd_speed(const char *cmd, int *rc)
8299 {
8300 int speed;
8301
8302 /* TODO:
8303 * Support speed <low> <medium> <high> ? */
8304
8305 if (sscanf(cmd, "speed %d", &speed) != 1)
8306 return 0;
8307
8308 *rc = fan_set_speed(speed);
8309 if (*rc == -ENXIO)
8310 pr_err("speed command accepted for unsupported access mode %d\n",
8311 fan_control_access_mode);
8312 else if (!*rc)
8313 tpacpi_disclose_usertask("procfs fan",
8314 "set speed to %d\n", speed);
8315
8316 return 1;
8317 }
8318
8319 static int fan_write_cmd_watchdog(const char *cmd, int *rc)
8320 {
8321 int interval;
8322
8323 if (sscanf(cmd, "watchdog %d", &interval) != 1)
8324 return 0;
8325
8326 if (interval < 0 || interval > 120)
8327 *rc = -EINVAL;
8328 else {
8329 fan_watchdog_maxinterval = interval;
8330 tpacpi_disclose_usertask("procfs fan",
8331 "set watchdog timer to %d\n",
8332 interval);
8333 }
8334
8335 return 1;
8336 }
8337
8338 static int fan_write(char *buf)
8339 {
8340 char *cmd;
8341 int rc = 0;
8342
8343 while (!rc && (cmd = next_cmd(&buf))) {
8344 if (!((fan_control_commands & TPACPI_FAN_CMD_LEVEL) &&
8345 fan_write_cmd_level(cmd, &rc)) &&
8346 !((fan_control_commands & TPACPI_FAN_CMD_ENABLE) &&
8347 (fan_write_cmd_enable(cmd, &rc) ||
8348 fan_write_cmd_disable(cmd, &rc) ||
8349 fan_write_cmd_watchdog(cmd, &rc))) &&
8350 !((fan_control_commands & TPACPI_FAN_CMD_SPEED) &&
8351 fan_write_cmd_speed(cmd, &rc))
8352 )
8353 rc = -EINVAL;
8354 else if (!rc)
8355 fan_watchdog_reset();
8356 }
8357
8358 return rc;
8359 }
8360
8361 static struct ibm_struct fan_driver_data = {
8362 .name = "fan",
8363 .read = fan_read,
8364 .write = fan_write,
8365 .exit = fan_exit,
8366 .suspend = fan_suspend,
8367 .resume = fan_resume,
8368 };
8369
8370 /*************************************************************************
8371 * Mute LED subdriver
8372 */
8373
8374
8375 struct tp_led_table {
8376 acpi_string name;
8377 int on_value;
8378 int off_value;
8379 int state;
8380 };
8381
8382 static struct tp_led_table led_tables[] = {
8383 [TPACPI_LED_MUTE] = {
8384 .name = "SSMS",
8385 .on_value = 1,
8386 .off_value = 0,
8387 },
8388 [TPACPI_LED_MICMUTE] = {
8389 .name = "MMTS",
8390 .on_value = 2,
8391 .off_value = 0,
8392 },
8393 };
8394
8395 static int mute_led_on_off(struct tp_led_table *t, bool state)
8396 {
8397 acpi_handle temp;
8398 int output;
8399
8400 if (!ACPI_SUCCESS(acpi_get_handle(hkey_handle, t->name, &temp))) {
8401 pr_warn("Thinkpad ACPI has no %s interface.\n", t->name);
8402 return -EIO;
8403 }
8404
8405 if (!acpi_evalf(hkey_handle, &output, t->name, "dd",
8406 state ? t->on_value : t->off_value))
8407 return -EIO;
8408
8409 t->state = state;
8410 return state;
8411 }
8412
8413 int tpacpi_led_set(int whichled, bool on)
8414 {
8415 struct tp_led_table *t;
8416
8417 if (whichled < 0 || whichled >= TPACPI_LED_MAX)
8418 return -EINVAL;
8419
8420 t = &led_tables[whichled];
8421 if (t->state < 0 || t->state == on)
8422 return t->state;
8423 return mute_led_on_off(t, on);
8424 }
8425 EXPORT_SYMBOL_GPL(tpacpi_led_set);
8426
8427 static int mute_led_init(struct ibm_init_struct *iibm)
8428 {
8429 acpi_handle temp;
8430 int i;
8431
8432 for (i = 0; i < TPACPI_LED_MAX; i++) {
8433 struct tp_led_table *t = &led_tables[i];
8434 if (ACPI_SUCCESS(acpi_get_handle(hkey_handle, t->name, &temp)))
8435 mute_led_on_off(t, false);
8436 else
8437 t->state = -ENODEV;
8438 }
8439 return 0;
8440 }
8441
8442 static void mute_led_exit(void)
8443 {
8444 int i;
8445
8446 for (i = 0; i < TPACPI_LED_MAX; i++)
8447 tpacpi_led_set(i, false);
8448 }
8449
8450 static struct ibm_struct mute_led_driver_data = {
8451 .name = "mute_led",
8452 .exit = mute_led_exit,
8453 };
8454
8455 /****************************************************************************
8456 ****************************************************************************
8457 *
8458 * Infrastructure
8459 *
8460 ****************************************************************************
8461 ****************************************************************************/
8462
8463 /*
8464 * HKEY event callout for other subdrivers go here
8465 * (yes, it is ugly, but it is quick, safe, and gets the job done
8466 */
8467 static void tpacpi_driver_event(const unsigned int hkey_event)
8468 {
8469 if (ibm_backlight_device) {
8470 switch (hkey_event) {
8471 case TP_HKEY_EV_BRGHT_UP:
8472 case TP_HKEY_EV_BRGHT_DOWN:
8473 tpacpi_brightness_notify_change();
8474 }
8475 }
8476 if (alsa_card) {
8477 switch (hkey_event) {
8478 case TP_HKEY_EV_VOL_UP:
8479 case TP_HKEY_EV_VOL_DOWN:
8480 case TP_HKEY_EV_VOL_MUTE:
8481 volume_alsa_notify_change();
8482 }
8483 }
8484 }
8485
8486 static void hotkey_driver_event(const unsigned int scancode)
8487 {
8488 tpacpi_driver_event(TP_HKEY_EV_HOTKEY_BASE + scancode);
8489 }
8490
8491 /* sysfs name ---------------------------------------------------------- */
8492 static ssize_t thinkpad_acpi_pdev_name_show(struct device *dev,
8493 struct device_attribute *attr,
8494 char *buf)
8495 {
8496 return snprintf(buf, PAGE_SIZE, "%s\n", TPACPI_NAME);
8497 }
8498
8499 static struct device_attribute dev_attr_thinkpad_acpi_pdev_name =
8500 __ATTR(name, S_IRUGO, thinkpad_acpi_pdev_name_show, NULL);
8501
8502 /* --------------------------------------------------------------------- */
8503
8504 /* /proc support */
8505 static struct proc_dir_entry *proc_dir;
8506
8507 /*
8508 * Module and infrastructure proble, init and exit handling
8509 */
8510
8511 static bool force_load;
8512
8513 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
8514 static const char * __init str_supported(int is_supported)
8515 {
8516 static char text_unsupported[] __initdata = "not supported";
8517
8518 return (is_supported)? &text_unsupported[4] : &text_unsupported[0];
8519 }
8520 #endif /* CONFIG_THINKPAD_ACPI_DEBUG */
8521
8522 static void ibm_exit(struct ibm_struct *ibm)
8523 {
8524 dbg_printk(TPACPI_DBG_EXIT, "removing %s\n", ibm->name);
8525
8526 list_del_init(&ibm->all_drivers);
8527
8528 if (ibm->flags.acpi_notify_installed) {
8529 dbg_printk(TPACPI_DBG_EXIT,
8530 "%s: acpi_remove_notify_handler\n", ibm->name);
8531 BUG_ON(!ibm->acpi);
8532 acpi_remove_notify_handler(*ibm->acpi->handle,
8533 ibm->acpi->type,
8534 dispatch_acpi_notify);
8535 ibm->flags.acpi_notify_installed = 0;
8536 }
8537
8538 if (ibm->flags.proc_created) {
8539 dbg_printk(TPACPI_DBG_EXIT,
8540 "%s: remove_proc_entry\n", ibm->name);
8541 remove_proc_entry(ibm->name, proc_dir);
8542 ibm->flags.proc_created = 0;
8543 }
8544
8545 if (ibm->flags.acpi_driver_registered) {
8546 dbg_printk(TPACPI_DBG_EXIT,
8547 "%s: acpi_bus_unregister_driver\n", ibm->name);
8548 BUG_ON(!ibm->acpi);
8549 acpi_bus_unregister_driver(ibm->acpi->driver);
8550 kfree(ibm->acpi->driver);
8551 ibm->acpi->driver = NULL;
8552 ibm->flags.acpi_driver_registered = 0;
8553 }
8554
8555 if (ibm->flags.init_called && ibm->exit) {
8556 ibm->exit();
8557 ibm->flags.init_called = 0;
8558 }
8559
8560 dbg_printk(TPACPI_DBG_INIT, "finished removing %s\n", ibm->name);
8561 }
8562
8563 static int __init ibm_init(struct ibm_init_struct *iibm)
8564 {
8565 int ret;
8566 struct ibm_struct *ibm = iibm->data;
8567 struct proc_dir_entry *entry;
8568
8569 BUG_ON(ibm == NULL);
8570
8571 INIT_LIST_HEAD(&ibm->all_drivers);
8572
8573 if (ibm->flags.experimental && !experimental)
8574 return 0;
8575
8576 dbg_printk(TPACPI_DBG_INIT,
8577 "probing for %s\n", ibm->name);
8578
8579 if (iibm->init) {
8580 ret = iibm->init(iibm);
8581 if (ret > 0)
8582 return 0; /* probe failed */
8583 if (ret)
8584 return ret;
8585
8586 ibm->flags.init_called = 1;
8587 }
8588
8589 if (ibm->acpi) {
8590 if (ibm->acpi->hid) {
8591 ret = register_tpacpi_subdriver(ibm);
8592 if (ret)
8593 goto err_out;
8594 }
8595
8596 if (ibm->acpi->notify) {
8597 ret = setup_acpi_notify(ibm);
8598 if (ret == -ENODEV) {
8599 pr_notice("disabling subdriver %s\n",
8600 ibm->name);
8601 ret = 0;
8602 goto err_out;
8603 }
8604 if (ret < 0)
8605 goto err_out;
8606 }
8607 }
8608
8609 dbg_printk(TPACPI_DBG_INIT,
8610 "%s installed\n", ibm->name);
8611
8612 if (ibm->read) {
8613 umode_t mode = iibm->base_procfs_mode;
8614
8615 if (!mode)
8616 mode = S_IRUGO;
8617 if (ibm->write)
8618 mode |= S_IWUSR;
8619 entry = proc_create_data(ibm->name, mode, proc_dir,
8620 &dispatch_proc_fops, ibm);
8621 if (!entry) {
8622 pr_err("unable to create proc entry %s\n", ibm->name);
8623 ret = -ENODEV;
8624 goto err_out;
8625 }
8626 ibm->flags.proc_created = 1;
8627 }
8628
8629 list_add_tail(&ibm->all_drivers, &tpacpi_all_drivers);
8630
8631 return 0;
8632
8633 err_out:
8634 dbg_printk(TPACPI_DBG_INIT,
8635 "%s: at error exit path with result %d\n",
8636 ibm->name, ret);
8637
8638 ibm_exit(ibm);
8639 return (ret < 0)? ret : 0;
8640 }
8641
8642 /* Probing */
8643
8644 static bool __pure __init tpacpi_is_fw_digit(const char c)
8645 {
8646 return (c >= '0' && c <= '9') || (c >= 'A' && c <= 'Z');
8647 }
8648
8649 /* Most models: xxyTkkWW (#.##c); Ancient 570/600 and -SL lacks (#.##c) */
8650 static bool __pure __init tpacpi_is_valid_fw_id(const char* const s,
8651 const char t)
8652 {
8653 return s && strlen(s) >= 8 &&
8654 tpacpi_is_fw_digit(s[0]) &&
8655 tpacpi_is_fw_digit(s[1]) &&
8656 s[2] == t &&
8657 (s[3] == 'T' || s[3] == 'N') &&
8658 tpacpi_is_fw_digit(s[4]) &&
8659 tpacpi_is_fw_digit(s[5]);
8660 }
8661
8662 /* returns 0 - probe ok, or < 0 - probe error.
8663 * Probe ok doesn't mean thinkpad found.
8664 * On error, kfree() cleanup on tp->* is not performed, caller must do it */
8665 static int __must_check __init get_thinkpad_model_data(
8666 struct thinkpad_id_data *tp)
8667 {
8668 const struct dmi_device *dev = NULL;
8669 char ec_fw_string[18];
8670 char const *s;
8671
8672 if (!tp)
8673 return -EINVAL;
8674
8675 memset(tp, 0, sizeof(*tp));
8676
8677 if (dmi_name_in_vendors("IBM"))
8678 tp->vendor = PCI_VENDOR_ID_IBM;
8679 else if (dmi_name_in_vendors("LENOVO"))
8680 tp->vendor = PCI_VENDOR_ID_LENOVO;
8681 else
8682 return 0;
8683
8684 s = dmi_get_system_info(DMI_BIOS_VERSION);
8685 tp->bios_version_str = kstrdup(s, GFP_KERNEL);
8686 if (s && !tp->bios_version_str)
8687 return -ENOMEM;
8688
8689 /* Really ancient ThinkPad 240X will fail this, which is fine */
8690 if (!(tpacpi_is_valid_fw_id(tp->bios_version_str, 'E') ||
8691 tpacpi_is_valid_fw_id(tp->bios_version_str, 'C')))
8692 return 0;
8693
8694 tp->bios_model = tp->bios_version_str[0]
8695 | (tp->bios_version_str[1] << 8);
8696 tp->bios_release = (tp->bios_version_str[4] << 8)
8697 | tp->bios_version_str[5];
8698
8699 /*
8700 * ThinkPad T23 or newer, A31 or newer, R50e or newer,
8701 * X32 or newer, all Z series; Some models must have an
8702 * up-to-date BIOS or they will not be detected.
8703 *
8704 * See http://thinkwiki.org/wiki/List_of_DMI_IDs
8705 */
8706 while ((dev = dmi_find_device(DMI_DEV_TYPE_OEM_STRING, NULL, dev))) {
8707 if (sscanf(dev->name,
8708 "IBM ThinkPad Embedded Controller -[%17c",
8709 ec_fw_string) == 1) {
8710 ec_fw_string[sizeof(ec_fw_string) - 1] = 0;
8711 ec_fw_string[strcspn(ec_fw_string, " ]")] = 0;
8712
8713 tp->ec_version_str = kstrdup(ec_fw_string, GFP_KERNEL);
8714 if (!tp->ec_version_str)
8715 return -ENOMEM;
8716
8717 if (tpacpi_is_valid_fw_id(ec_fw_string, 'H')) {
8718 tp->ec_model = ec_fw_string[0]
8719 | (ec_fw_string[1] << 8);
8720 tp->ec_release = (ec_fw_string[4] << 8)
8721 | ec_fw_string[5];
8722 } else {
8723 pr_notice("ThinkPad firmware release %s "
8724 "doesn't match the known patterns\n",
8725 ec_fw_string);
8726 pr_notice("please report this to %s\n",
8727 TPACPI_MAIL);
8728 }
8729 break;
8730 }
8731 }
8732
8733 s = dmi_get_system_info(DMI_PRODUCT_VERSION);
8734 if (s && !(strnicmp(s, "ThinkPad", 8) && strnicmp(s, "Lenovo", 6))) {
8735 tp->model_str = kstrdup(s, GFP_KERNEL);
8736 if (!tp->model_str)
8737 return -ENOMEM;
8738 } else {
8739 s = dmi_get_system_info(DMI_BIOS_VENDOR);
8740 if (s && !(strnicmp(s, "Lenovo", 6))) {
8741 tp->model_str = kstrdup(s, GFP_KERNEL);
8742 if (!tp->model_str)
8743 return -ENOMEM;
8744 }
8745 }
8746
8747 s = dmi_get_system_info(DMI_PRODUCT_NAME);
8748 tp->nummodel_str = kstrdup(s, GFP_KERNEL);
8749 if (s && !tp->nummodel_str)
8750 return -ENOMEM;
8751
8752 return 0;
8753 }
8754
8755 static int __init probe_for_thinkpad(void)
8756 {
8757 int is_thinkpad;
8758
8759 if (acpi_disabled)
8760 return -ENODEV;
8761
8762 /* It would be dangerous to run the driver in this case */
8763 if (!tpacpi_is_ibm() && !tpacpi_is_lenovo())
8764 return -ENODEV;
8765
8766 /*
8767 * Non-ancient models have better DMI tagging, but very old models
8768 * don't. tpacpi_is_fw_known() is a cheat to help in that case.
8769 */
8770 is_thinkpad = (thinkpad_id.model_str != NULL) ||
8771 (thinkpad_id.ec_model != 0) ||
8772 tpacpi_is_fw_known();
8773
8774 /* The EC handler is required */
8775 tpacpi_acpi_handle_locate("ec", TPACPI_ACPI_EC_HID, &ec_handle);
8776 if (!ec_handle) {
8777 if (is_thinkpad)
8778 pr_err("Not yet supported ThinkPad detected!\n");
8779 return -ENODEV;
8780 }
8781
8782 if (!is_thinkpad && !force_load)
8783 return -ENODEV;
8784
8785 return 0;
8786 }
8787
8788 static void __init thinkpad_acpi_init_banner(void)
8789 {
8790 pr_info("%s v%s\n", TPACPI_DESC, TPACPI_VERSION);
8791 pr_info("%s\n", TPACPI_URL);
8792
8793 pr_info("ThinkPad BIOS %s, EC %s\n",
8794 (thinkpad_id.bios_version_str) ?
8795 thinkpad_id.bios_version_str : "unknown",
8796 (thinkpad_id.ec_version_str) ?
8797 thinkpad_id.ec_version_str : "unknown");
8798
8799 BUG_ON(!thinkpad_id.vendor);
8800
8801 if (thinkpad_id.model_str)
8802 pr_info("%s %s, model %s\n",
8803 (thinkpad_id.vendor == PCI_VENDOR_ID_IBM) ?
8804 "IBM" : ((thinkpad_id.vendor ==
8805 PCI_VENDOR_ID_LENOVO) ?
8806 "Lenovo" : "Unknown vendor"),
8807 thinkpad_id.model_str,
8808 (thinkpad_id.nummodel_str) ?
8809 thinkpad_id.nummodel_str : "unknown");
8810 }
8811
8812 /* Module init, exit, parameters */
8813
8814 static struct ibm_init_struct ibms_init[] __initdata = {
8815 {
8816 .data = &thinkpad_acpi_driver_data,
8817 },
8818 {
8819 .init = hotkey_init,
8820 .data = &hotkey_driver_data,
8821 },
8822 {
8823 .init = bluetooth_init,
8824 .data = &bluetooth_driver_data,
8825 },
8826 {
8827 .init = wan_init,
8828 .data = &wan_driver_data,
8829 },
8830 {
8831 .init = uwb_init,
8832 .data = &uwb_driver_data,
8833 },
8834 #ifdef CONFIG_THINKPAD_ACPI_VIDEO
8835 {
8836 .init = video_init,
8837 .base_procfs_mode = S_IRUSR,
8838 .data = &video_driver_data,
8839 },
8840 #endif
8841 {
8842 .init = light_init,
8843 .data = &light_driver_data,
8844 },
8845 {
8846 .init = cmos_init,
8847 .data = &cmos_driver_data,
8848 },
8849 {
8850 .init = led_init,
8851 .data = &led_driver_data,
8852 },
8853 {
8854 .init = beep_init,
8855 .data = &beep_driver_data,
8856 },
8857 {
8858 .init = thermal_init,
8859 .data = &thermal_driver_data,
8860 },
8861 {
8862 .init = brightness_init,
8863 .data = &brightness_driver_data,
8864 },
8865 {
8866 .init = volume_init,
8867 .data = &volume_driver_data,
8868 },
8869 {
8870 .init = fan_init,
8871 .data = &fan_driver_data,
8872 },
8873 {
8874 .init = mute_led_init,
8875 .data = &mute_led_driver_data,
8876 },
8877 };
8878
8879 static int __init set_ibm_param(const char *val, struct kernel_param *kp)
8880 {
8881 unsigned int i;
8882 struct ibm_struct *ibm;
8883
8884 if (!kp || !kp->name || !val)
8885 return -EINVAL;
8886
8887 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
8888 ibm = ibms_init[i].data;
8889 WARN_ON(ibm == NULL);
8890
8891 if (!ibm || !ibm->name)
8892 continue;
8893
8894 if (strcmp(ibm->name, kp->name) == 0 && ibm->write) {
8895 if (strlen(val) > sizeof(ibms_init[i].param) - 2)
8896 return -ENOSPC;
8897 strcpy(ibms_init[i].param, val);
8898 strcat(ibms_init[i].param, ",");
8899 return 0;
8900 }
8901 }
8902
8903 return -EINVAL;
8904 }
8905
8906 module_param(experimental, int, 0444);
8907 MODULE_PARM_DESC(experimental,
8908 "Enables experimental features when non-zero");
8909
8910 module_param_named(debug, dbg_level, uint, 0);
8911 MODULE_PARM_DESC(debug, "Sets debug level bit-mask");
8912
8913 module_param(force_load, bool, 0444);
8914 MODULE_PARM_DESC(force_load,
8915 "Attempts to load the driver even on a "
8916 "mis-identified ThinkPad when true");
8917
8918 module_param_named(fan_control, fan_control_allowed, bool, 0444);
8919 MODULE_PARM_DESC(fan_control,
8920 "Enables setting fan parameters features when true");
8921
8922 module_param_named(brightness_mode, brightness_mode, uint, 0444);
8923 MODULE_PARM_DESC(brightness_mode,
8924 "Selects brightness control strategy: "
8925 "0=auto, 1=EC, 2=UCMS, 3=EC+NVRAM");
8926
8927 module_param(brightness_enable, uint, 0444);
8928 MODULE_PARM_DESC(brightness_enable,
8929 "Enables backlight control when 1, disables when 0");
8930
8931 #ifdef CONFIG_THINKPAD_ACPI_ALSA_SUPPORT
8932 module_param_named(volume_mode, volume_mode, uint, 0444);
8933 MODULE_PARM_DESC(volume_mode,
8934 "Selects volume control strategy: "
8935 "0=auto, 1=EC, 2=N/A, 3=EC+NVRAM");
8936
8937 module_param_named(volume_capabilities, volume_capabilities, uint, 0444);
8938 MODULE_PARM_DESC(volume_capabilities,
8939 "Selects the mixer capabilites: "
8940 "0=auto, 1=volume and mute, 2=mute only");
8941
8942 module_param_named(volume_control, volume_control_allowed, bool, 0444);
8943 MODULE_PARM_DESC(volume_control,
8944 "Enables software override for the console audio "
8945 "control when true");
8946
8947 /* ALSA module API parameters */
8948 module_param_named(index, alsa_index, int, 0444);
8949 MODULE_PARM_DESC(index, "ALSA index for the ACPI EC Mixer");
8950 module_param_named(id, alsa_id, charp, 0444);
8951 MODULE_PARM_DESC(id, "ALSA id for the ACPI EC Mixer");
8952 module_param_named(enable, alsa_enable, bool, 0444);
8953 MODULE_PARM_DESC(enable, "Enable the ALSA interface for the ACPI EC Mixer");
8954 #endif /* CONFIG_THINKPAD_ACPI_ALSA_SUPPORT */
8955
8956 #define TPACPI_PARAM(feature) \
8957 module_param_call(feature, set_ibm_param, NULL, NULL, 0); \
8958 MODULE_PARM_DESC(feature, "Simulates thinkpad-acpi procfs command " \
8959 "at module load, see documentation")
8960
8961 TPACPI_PARAM(hotkey);
8962 TPACPI_PARAM(bluetooth);
8963 TPACPI_PARAM(video);
8964 TPACPI_PARAM(light);
8965 TPACPI_PARAM(cmos);
8966 TPACPI_PARAM(led);
8967 TPACPI_PARAM(beep);
8968 TPACPI_PARAM(brightness);
8969 TPACPI_PARAM(volume);
8970 TPACPI_PARAM(fan);
8971
8972 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
8973 module_param(dbg_wlswemul, uint, 0444);
8974 MODULE_PARM_DESC(dbg_wlswemul, "Enables WLSW emulation");
8975 module_param_named(wlsw_state, tpacpi_wlsw_emulstate, bool, 0);
8976 MODULE_PARM_DESC(wlsw_state,
8977 "Initial state of the emulated WLSW switch");
8978
8979 module_param(dbg_bluetoothemul, uint, 0444);
8980 MODULE_PARM_DESC(dbg_bluetoothemul, "Enables bluetooth switch emulation");
8981 module_param_named(bluetooth_state, tpacpi_bluetooth_emulstate, bool, 0);
8982 MODULE_PARM_DESC(bluetooth_state,
8983 "Initial state of the emulated bluetooth switch");
8984
8985 module_param(dbg_wwanemul, uint, 0444);
8986 MODULE_PARM_DESC(dbg_wwanemul, "Enables WWAN switch emulation");
8987 module_param_named(wwan_state, tpacpi_wwan_emulstate, bool, 0);
8988 MODULE_PARM_DESC(wwan_state,
8989 "Initial state of the emulated WWAN switch");
8990
8991 module_param(dbg_uwbemul, uint, 0444);
8992 MODULE_PARM_DESC(dbg_uwbemul, "Enables UWB switch emulation");
8993 module_param_named(uwb_state, tpacpi_uwb_emulstate, bool, 0);
8994 MODULE_PARM_DESC(uwb_state,
8995 "Initial state of the emulated UWB switch");
8996 #endif
8997
8998 static void thinkpad_acpi_module_exit(void)
8999 {
9000 struct ibm_struct *ibm, *itmp;
9001
9002 tpacpi_lifecycle = TPACPI_LIFE_EXITING;
9003
9004 list_for_each_entry_safe_reverse(ibm, itmp,
9005 &tpacpi_all_drivers,
9006 all_drivers) {
9007 ibm_exit(ibm);
9008 }
9009
9010 dbg_printk(TPACPI_DBG_INIT, "finished subdriver exit path...\n");
9011
9012 if (tpacpi_inputdev) {
9013 if (tp_features.input_device_registered)
9014 input_unregister_device(tpacpi_inputdev);
9015 else
9016 input_free_device(tpacpi_inputdev);
9017 kfree(hotkey_keycode_map);
9018 }
9019
9020 if (tpacpi_hwmon)
9021 hwmon_device_unregister(tpacpi_hwmon);
9022
9023 if (tp_features.sensors_pdev_attrs_registered)
9024 device_remove_file(&tpacpi_sensors_pdev->dev,
9025 &dev_attr_thinkpad_acpi_pdev_name);
9026 if (tpacpi_sensors_pdev)
9027 platform_device_unregister(tpacpi_sensors_pdev);
9028 if (tpacpi_pdev)
9029 platform_device_unregister(tpacpi_pdev);
9030
9031 if (tp_features.sensors_pdrv_attrs_registered)
9032 tpacpi_remove_driver_attributes(&tpacpi_hwmon_pdriver.driver);
9033 if (tp_features.platform_drv_attrs_registered)
9034 tpacpi_remove_driver_attributes(&tpacpi_pdriver.driver);
9035
9036 if (tp_features.sensors_pdrv_registered)
9037 platform_driver_unregister(&tpacpi_hwmon_pdriver);
9038
9039 if (tp_features.platform_drv_registered)
9040 platform_driver_unregister(&tpacpi_pdriver);
9041
9042 if (proc_dir)
9043 remove_proc_entry(TPACPI_PROC_DIR, acpi_root_dir);
9044
9045 if (tpacpi_wq)
9046 destroy_workqueue(tpacpi_wq);
9047
9048 kfree(thinkpad_id.bios_version_str);
9049 kfree(thinkpad_id.ec_version_str);
9050 kfree(thinkpad_id.model_str);
9051 kfree(thinkpad_id.nummodel_str);
9052 }
9053
9054
9055 static int __init thinkpad_acpi_module_init(void)
9056 {
9057 int ret, i;
9058
9059 tpacpi_lifecycle = TPACPI_LIFE_INIT;
9060
9061 /* Driver-level probe */
9062
9063 ret = get_thinkpad_model_data(&thinkpad_id);
9064 if (ret) {
9065 pr_err("unable to get DMI data: %d\n", ret);
9066 thinkpad_acpi_module_exit();
9067 return ret;
9068 }
9069 ret = probe_for_thinkpad();
9070 if (ret) {
9071 thinkpad_acpi_module_exit();
9072 return ret;
9073 }
9074
9075 /* Driver initialization */
9076
9077 thinkpad_acpi_init_banner();
9078 tpacpi_check_outdated_fw();
9079
9080 TPACPI_ACPIHANDLE_INIT(ecrd);
9081 TPACPI_ACPIHANDLE_INIT(ecwr);
9082
9083 tpacpi_wq = create_singlethread_workqueue(TPACPI_WORKQUEUE_NAME);
9084 if (!tpacpi_wq) {
9085 thinkpad_acpi_module_exit();
9086 return -ENOMEM;
9087 }
9088
9089 proc_dir = proc_mkdir(TPACPI_PROC_DIR, acpi_root_dir);
9090 if (!proc_dir) {
9091 pr_err("unable to create proc dir " TPACPI_PROC_DIR "\n");
9092 thinkpad_acpi_module_exit();
9093 return -ENODEV;
9094 }
9095
9096 ret = platform_driver_register(&tpacpi_pdriver);
9097 if (ret) {
9098 pr_err("unable to register main platform driver\n");
9099 thinkpad_acpi_module_exit();
9100 return ret;
9101 }
9102 tp_features.platform_drv_registered = 1;
9103
9104 ret = platform_driver_register(&tpacpi_hwmon_pdriver);
9105 if (ret) {
9106 pr_err("unable to register hwmon platform driver\n");
9107 thinkpad_acpi_module_exit();
9108 return ret;
9109 }
9110 tp_features.sensors_pdrv_registered = 1;
9111
9112 ret = tpacpi_create_driver_attributes(&tpacpi_pdriver.driver);
9113 if (!ret) {
9114 tp_features.platform_drv_attrs_registered = 1;
9115 ret = tpacpi_create_driver_attributes(
9116 &tpacpi_hwmon_pdriver.driver);
9117 }
9118 if (ret) {
9119 pr_err("unable to create sysfs driver attributes\n");
9120 thinkpad_acpi_module_exit();
9121 return ret;
9122 }
9123 tp_features.sensors_pdrv_attrs_registered = 1;
9124
9125
9126 /* Device initialization */
9127 tpacpi_pdev = platform_device_register_simple(TPACPI_DRVR_NAME, -1,
9128 NULL, 0);
9129 if (IS_ERR(tpacpi_pdev)) {
9130 ret = PTR_ERR(tpacpi_pdev);
9131 tpacpi_pdev = NULL;
9132 pr_err("unable to register platform device\n");
9133 thinkpad_acpi_module_exit();
9134 return ret;
9135 }
9136 tpacpi_sensors_pdev = platform_device_register_simple(
9137 TPACPI_HWMON_DRVR_NAME,
9138 -1, NULL, 0);
9139 if (IS_ERR(tpacpi_sensors_pdev)) {
9140 ret = PTR_ERR(tpacpi_sensors_pdev);
9141 tpacpi_sensors_pdev = NULL;
9142 pr_err("unable to register hwmon platform device\n");
9143 thinkpad_acpi_module_exit();
9144 return ret;
9145 }
9146 ret = device_create_file(&tpacpi_sensors_pdev->dev,
9147 &dev_attr_thinkpad_acpi_pdev_name);
9148 if (ret) {
9149 pr_err("unable to create sysfs hwmon device attributes\n");
9150 thinkpad_acpi_module_exit();
9151 return ret;
9152 }
9153 tp_features.sensors_pdev_attrs_registered = 1;
9154 tpacpi_hwmon = hwmon_device_register(&tpacpi_sensors_pdev->dev);
9155 if (IS_ERR(tpacpi_hwmon)) {
9156 ret = PTR_ERR(tpacpi_hwmon);
9157 tpacpi_hwmon = NULL;
9158 pr_err("unable to register hwmon device\n");
9159 thinkpad_acpi_module_exit();
9160 return ret;
9161 }
9162 mutex_init(&tpacpi_inputdev_send_mutex);
9163 tpacpi_inputdev = input_allocate_device();
9164 if (!tpacpi_inputdev) {
9165 thinkpad_acpi_module_exit();
9166 return -ENOMEM;
9167 } else {
9168 /* Prepare input device, but don't register */
9169 tpacpi_inputdev->name = "ThinkPad Extra Buttons";
9170 tpacpi_inputdev->phys = TPACPI_DRVR_NAME "/input0";
9171 tpacpi_inputdev->id.bustype = BUS_HOST;
9172 tpacpi_inputdev->id.vendor = thinkpad_id.vendor;
9173 tpacpi_inputdev->id.product = TPACPI_HKEY_INPUT_PRODUCT;
9174 tpacpi_inputdev->id.version = TPACPI_HKEY_INPUT_VERSION;
9175 tpacpi_inputdev->dev.parent = &tpacpi_pdev->dev;
9176 }
9177
9178 /* Init subdriver dependencies */
9179 tpacpi_detect_brightness_capabilities();
9180
9181 /* Init subdrivers */
9182 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
9183 ret = ibm_init(&ibms_init[i]);
9184 if (ret >= 0 && *ibms_init[i].param)
9185 ret = ibms_init[i].data->write(ibms_init[i].param);
9186 if (ret < 0) {
9187 thinkpad_acpi_module_exit();
9188 return ret;
9189 }
9190 }
9191
9192 tpacpi_lifecycle = TPACPI_LIFE_RUNNING;
9193
9194 ret = input_register_device(tpacpi_inputdev);
9195 if (ret < 0) {
9196 pr_err("unable to register input device\n");
9197 thinkpad_acpi_module_exit();
9198 return ret;
9199 } else {
9200 tp_features.input_device_registered = 1;
9201 }
9202
9203 return 0;
9204 }
9205
9206 MODULE_ALIAS(TPACPI_DRVR_SHORTNAME);
9207
9208 /*
9209 * This will autoload the driver in almost every ThinkPad
9210 * in widespread use.
9211 *
9212 * Only _VERY_ old models, like the 240, 240x and 570 lack
9213 * the HKEY event interface.
9214 */
9215 MODULE_DEVICE_TABLE(acpi, ibm_htk_device_ids);
9216
9217 /*
9218 * DMI matching for module autoloading
9219 *
9220 * See http://thinkwiki.org/wiki/List_of_DMI_IDs
9221 * See http://thinkwiki.org/wiki/BIOS_Upgrade_Downloads
9222 *
9223 * Only models listed in thinkwiki will be supported, so add yours
9224 * if it is not there yet.
9225 */
9226 #define IBM_BIOS_MODULE_ALIAS(__type) \
9227 MODULE_ALIAS("dmi:bvnIBM:bvr" __type "ET??WW*")
9228
9229 /* Ancient thinkpad BIOSes have to be identified by
9230 * BIOS type or model number, and there are far less
9231 * BIOS types than model numbers... */
9232 IBM_BIOS_MODULE_ALIAS("I[MU]"); /* 570, 570e */
9233
9234 MODULE_AUTHOR("Borislav Deianov <borislav@users.sf.net>");
9235 MODULE_AUTHOR("Henrique de Moraes Holschuh <hmh@hmh.eng.br>");
9236 MODULE_DESCRIPTION(TPACPI_DESC);
9237 MODULE_VERSION(TPACPI_VERSION);
9238 MODULE_LICENSE("GPL");
9239
9240 module_init(thinkpad_acpi_module_init);
9241 module_exit(thinkpad_acpi_module_exit);
Linux with added FPC-III support