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Linux 3.12.39
[linux/fpc-iii.git] / drivers / platform / x86 / thinkpad_acpi.c
blob4e86e9767ba6bf0b2438f0480f3146df1e6a7157
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 "0.24"
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
65 #include <linux/nvram.h>
66 #include <linux/proc_fs.h>
67 #include <linux/seq_file.h>
68 #include <linux/sysfs.h>
69 #include <linux/backlight.h>
70 #include <linux/fb.h>
71 #include <linux/platform_device.h>
72 #include <linux/hwmon.h>
73 #include <linux/hwmon-sysfs.h>
74 #include <linux/input.h>
75 #include <linux/leds.h>
76 #include <linux/rfkill.h>
77 #include <asm/uaccess.h>
78
79 #include <linux/dmi.h>
80 #include <linux/jiffies.h>
81 #include <linux/workqueue.h>
82
83 #include <sound/core.h>
84 #include <sound/control.h>
85 #include <sound/initval.h>
86
87 #include <acpi/acpi_drivers.h>
88
89 #include <linux/pci_ids.h>
90
91
92 /* ThinkPad CMOS commands */
93 #define TP_CMOS_VOLUME_DOWN 0
94 #define TP_CMOS_VOLUME_UP 1
95 #define TP_CMOS_VOLUME_MUTE 2
96 #define TP_CMOS_BRIGHTNESS_UP 4
97 #define TP_CMOS_BRIGHTNESS_DOWN 5
98 #define TP_CMOS_THINKLIGHT_ON 12
99 #define TP_CMOS_THINKLIGHT_OFF 13
100
101 /* NVRAM Addresses */
102 enum tp_nvram_addr {
103 TP_NVRAM_ADDR_HK2 = 0x57,
104 TP_NVRAM_ADDR_THINKLIGHT = 0x58,
105 TP_NVRAM_ADDR_VIDEO = 0x59,
106 TP_NVRAM_ADDR_BRIGHTNESS = 0x5e,
107 TP_NVRAM_ADDR_MIXER = 0x60,
108 };
109
110 /* NVRAM bit masks */
111 enum {
112 TP_NVRAM_MASK_HKT_THINKPAD = 0x08,
113 TP_NVRAM_MASK_HKT_ZOOM = 0x20,
114 TP_NVRAM_MASK_HKT_DISPLAY = 0x40,
115 TP_NVRAM_MASK_HKT_HIBERNATE = 0x80,
116 TP_NVRAM_MASK_THINKLIGHT = 0x10,
117 TP_NVRAM_MASK_HKT_DISPEXPND = 0x30,
118 TP_NVRAM_MASK_HKT_BRIGHTNESS = 0x20,
119 TP_NVRAM_MASK_LEVEL_BRIGHTNESS = 0x0f,
120 TP_NVRAM_POS_LEVEL_BRIGHTNESS = 0,
121 TP_NVRAM_MASK_MUTE = 0x40,
122 TP_NVRAM_MASK_HKT_VOLUME = 0x80,
123 TP_NVRAM_MASK_LEVEL_VOLUME = 0x0f,
124 TP_NVRAM_POS_LEVEL_VOLUME = 0,
125 };
126
127 /* Misc NVRAM-related */
128 enum {
129 TP_NVRAM_LEVEL_VOLUME_MAX = 14,
130 };
131
132 /* ACPI HIDs */
133 #define TPACPI_ACPI_IBM_HKEY_HID "IBM0068"
134 #define TPACPI_ACPI_LENOVO_HKEY_HID "LEN0068"
135 #define TPACPI_ACPI_EC_HID "PNP0C09"
136
137 /* Input IDs */
138 #define TPACPI_HKEY_INPUT_PRODUCT 0x5054 /* "TP" */
139 #define TPACPI_HKEY_INPUT_VERSION 0x4101
140
141 /* ACPI \WGSV commands */
142 enum {
143 TP_ACPI_WGSV_GET_STATE = 0x01, /* Get state information */
144 TP_ACPI_WGSV_PWR_ON_ON_RESUME = 0x02, /* Resume WWAN powered on */
145 TP_ACPI_WGSV_PWR_OFF_ON_RESUME = 0x03, /* Resume WWAN powered off */
146 TP_ACPI_WGSV_SAVE_STATE = 0x04, /* Save state for S4/S5 */
147 };
148
149 /* TP_ACPI_WGSV_GET_STATE bits */
150 enum {
151 TP_ACPI_WGSV_STATE_WWANEXIST = 0x0001, /* WWAN hw available */
152 TP_ACPI_WGSV_STATE_WWANPWR = 0x0002, /* WWAN radio enabled */
153 TP_ACPI_WGSV_STATE_WWANPWRRES = 0x0004, /* WWAN state at resume */
154 TP_ACPI_WGSV_STATE_WWANBIOSOFF = 0x0008, /* WWAN disabled in BIOS */
155 TP_ACPI_WGSV_STATE_BLTHEXIST = 0x0001, /* BLTH hw available */
156 TP_ACPI_WGSV_STATE_BLTHPWR = 0x0002, /* BLTH radio enabled */
157 TP_ACPI_WGSV_STATE_BLTHPWRRES = 0x0004, /* BLTH state at resume */
158 TP_ACPI_WGSV_STATE_BLTHBIOSOFF = 0x0008, /* BLTH disabled in BIOS */
159 TP_ACPI_WGSV_STATE_UWBEXIST = 0x0010, /* UWB hw available */
160 TP_ACPI_WGSV_STATE_UWBPWR = 0x0020, /* UWB radio enabled */
161 };
162
163 /* HKEY events */
164 enum tpacpi_hkey_event_t {
165 /* Hotkey-related */
166 TP_HKEY_EV_HOTKEY_BASE = 0x1001, /* first hotkey (FN+F1) */
167 TP_HKEY_EV_BRGHT_UP = 0x1010, /* Brightness up */
168 TP_HKEY_EV_BRGHT_DOWN = 0x1011, /* Brightness down */
169 TP_HKEY_EV_VOL_UP = 0x1015, /* Volume up or unmute */
170 TP_HKEY_EV_VOL_DOWN = 0x1016, /* Volume down or unmute */
171 TP_HKEY_EV_VOL_MUTE = 0x1017, /* Mixer output mute */
172
173 /* Reasons for waking up from S3/S4 */
174 TP_HKEY_EV_WKUP_S3_UNDOCK = 0x2304, /* undock requested, S3 */
175 TP_HKEY_EV_WKUP_S4_UNDOCK = 0x2404, /* undock requested, S4 */
176 TP_HKEY_EV_WKUP_S3_BAYEJ = 0x2305, /* bay ejection req, S3 */
177 TP_HKEY_EV_WKUP_S4_BAYEJ = 0x2405, /* bay ejection req, S4 */
178 TP_HKEY_EV_WKUP_S3_BATLOW = 0x2313, /* battery empty, S3 */
179 TP_HKEY_EV_WKUP_S4_BATLOW = 0x2413, /* battery empty, S4 */
180
181 /* Auto-sleep after eject request */
182 TP_HKEY_EV_BAYEJ_ACK = 0x3003, /* bay ejection complete */
183 TP_HKEY_EV_UNDOCK_ACK = 0x4003, /* undock complete */
184
185 /* Misc bay events */
186 TP_HKEY_EV_OPTDRV_EJ = 0x3006, /* opt. drive tray ejected */
187 TP_HKEY_EV_HOTPLUG_DOCK = 0x4010, /* docked into hotplug dock
188 or port replicator */
189 TP_HKEY_EV_HOTPLUG_UNDOCK = 0x4011, /* undocked from hotplug
190 dock or port replicator */
191
192 /* User-interface events */
193 TP_HKEY_EV_LID_CLOSE = 0x5001, /* laptop lid closed */
194 TP_HKEY_EV_LID_OPEN = 0x5002, /* laptop lid opened */
195 TP_HKEY_EV_TABLET_TABLET = 0x5009, /* tablet swivel up */
196 TP_HKEY_EV_TABLET_NOTEBOOK = 0x500a, /* tablet swivel down */
197 TP_HKEY_EV_PEN_INSERTED = 0x500b, /* tablet pen inserted */
198 TP_HKEY_EV_PEN_REMOVED = 0x500c, /* tablet pen removed */
199 TP_HKEY_EV_BRGHT_CHANGED = 0x5010, /* backlight control event */
200
201 /* Key-related user-interface events */
202 TP_HKEY_EV_KEY_NUMLOCK = 0x6000, /* NumLock key pressed */
203 TP_HKEY_EV_KEY_FN = 0x6005, /* Fn key pressed? E420 */
204
205 /* Thermal events */
206 TP_HKEY_EV_ALARM_BAT_HOT = 0x6011, /* battery too hot */
207 TP_HKEY_EV_ALARM_BAT_XHOT = 0x6012, /* battery critically hot */
208 TP_HKEY_EV_ALARM_SENSOR_HOT = 0x6021, /* sensor too hot */
209 TP_HKEY_EV_ALARM_SENSOR_XHOT = 0x6022, /* sensor critically hot */
210 TP_HKEY_EV_THM_TABLE_CHANGED = 0x6030, /* thermal table changed */
211
212 /* AC-related events */
213 TP_HKEY_EV_AC_CHANGED = 0x6040, /* AC status changed */
214
215 /* Misc */
216 TP_HKEY_EV_RFKILL_CHANGED = 0x7000, /* rfkill switch changed */
217 };
218
219 /****************************************************************************
220 * Main driver
221 */
222
223 #define TPACPI_NAME "thinkpad"
224 #define TPACPI_DESC "ThinkPad ACPI Extras"
225 #define TPACPI_FILE TPACPI_NAME "_acpi"
226 #define TPACPI_URL "http://ibm-acpi.sf.net/"
227 #define TPACPI_MAIL "ibm-acpi-devel@lists.sourceforge.net"
228
229 #define TPACPI_PROC_DIR "ibm"
230 #define TPACPI_ACPI_EVENT_PREFIX "ibm"
231 #define TPACPI_DRVR_NAME TPACPI_FILE
232 #define TPACPI_DRVR_SHORTNAME "tpacpi"
233 #define TPACPI_HWMON_DRVR_NAME TPACPI_NAME "_hwmon"
234
235 #define TPACPI_NVRAM_KTHREAD_NAME "ktpacpi_nvramd"
236 #define TPACPI_WORKQUEUE_NAME "ktpacpid"
237
238 #define TPACPI_MAX_ACPI_ARGS 3
239
240 /* Debugging printk groups */
241 #define TPACPI_DBG_ALL 0xffff
242 #define TPACPI_DBG_DISCLOSETASK 0x8000
243 #define TPACPI_DBG_INIT 0x0001
244 #define TPACPI_DBG_EXIT 0x0002
245 #define TPACPI_DBG_RFKILL 0x0004
246 #define TPACPI_DBG_HKEY 0x0008
247 #define TPACPI_DBG_FAN 0x0010
248 #define TPACPI_DBG_BRGHT 0x0020
249 #define TPACPI_DBG_MIXER 0x0040
250
251 #define onoff(status, bit) ((status) & (1 << (bit)) ? "on" : "off")
252 #define enabled(status, bit) ((status) & (1 << (bit)) ? "enabled" : "disabled")
253 #define strlencmp(a, b) (strncmp((a), (b), strlen(b)))
254
255
256 /****************************************************************************
257 * Driver-wide structs and misc. variables
258 */
259
260 struct ibm_struct;
261
262 struct tp_acpi_drv_struct {
263 const struct acpi_device_id *hid;
264 struct acpi_driver *driver;
265
266 void (*notify) (struct ibm_struct *, u32);
267 acpi_handle *handle;
268 u32 type;
269 struct acpi_device *device;
270 };
271
272 struct ibm_struct {
273 char *name;
274
275 int (*read) (struct seq_file *);
276 int (*write) (char *);
277 void (*exit) (void);
278 void (*resume) (void);
279 void (*suspend) (void);
280 void (*shutdown) (void);
281
282 struct list_head all_drivers;
283
284 struct tp_acpi_drv_struct *acpi;
285
286 struct {
287 u8 acpi_driver_registered:1;
288 u8 acpi_notify_installed:1;
289 u8 proc_created:1;
290 u8 init_called:1;
291 u8 experimental:1;
292 } flags;
293 };
294
295 struct ibm_init_struct {
296 char param[32];
297
298 int (*init) (struct ibm_init_struct *);
299 umode_t base_procfs_mode;
300 struct ibm_struct *data;
301 };
302
303 static struct {
304 u32 bluetooth:1;
305 u32 hotkey:1;
306 u32 hotkey_mask:1;
307 u32 hotkey_wlsw:1;
308 u32 hotkey_tablet:1;
309 u32 light:1;
310 u32 light_status:1;
311 u32 bright_acpimode:1;
312 u32 bright_unkfw:1;
313 u32 wan:1;
314 u32 uwb:1;
315 u32 fan_ctrl_status_undef:1;
316 u32 second_fan:1;
317 u32 beep_needs_two_args:1;
318 u32 mixer_no_level_control:1;
319 u32 input_device_registered:1;
320 u32 platform_drv_registered:1;
321 u32 platform_drv_attrs_registered:1;
322 u32 sensors_pdrv_registered:1;
323 u32 sensors_pdrv_attrs_registered:1;
324 u32 sensors_pdev_attrs_registered:1;
325 u32 hotkey_poll_active:1;
326 } tp_features;
327
328 static struct {
329 u16 hotkey_mask_ff:1;
330 u16 volume_ctrl_forbidden:1;
331 } tp_warned;
332
333 struct thinkpad_id_data {
334 unsigned int vendor; /* ThinkPad vendor:
335 * PCI_VENDOR_ID_IBM/PCI_VENDOR_ID_LENOVO */
336
337 char *bios_version_str; /* Something like 1ZET51WW (1.03z) */
338 char *ec_version_str; /* Something like 1ZHT51WW-1.04a */
339
340 u16 bios_model; /* 1Y = 0x5931, 0 = unknown */
341 u16 ec_model;
342 u16 bios_release; /* 1ZETK1WW = 0x314b, 0 = unknown */
343 u16 ec_release;
344
345 char *model_str; /* ThinkPad T43 */
346 char *nummodel_str; /* 9384A9C for a 9384-A9C model */
347 };
348 static struct thinkpad_id_data thinkpad_id;
349
350 static enum {
351 TPACPI_LIFE_INIT = 0,
352 TPACPI_LIFE_RUNNING,
353 TPACPI_LIFE_EXITING,
354 } tpacpi_lifecycle;
355
356 static int experimental;
357 static u32 dbg_level;
358
359 static struct workqueue_struct *tpacpi_wq;
360
361 enum led_status_t {
362 TPACPI_LED_OFF = 0,
363 TPACPI_LED_ON,
364 TPACPI_LED_BLINK,
365 };
366
367 /* Special LED class that can defer work */
368 struct tpacpi_led_classdev {
369 struct led_classdev led_classdev;
370 struct work_struct work;
371 enum led_status_t new_state;
372 int led;
373 };
374
375 /* brightness level capabilities */
376 static unsigned int bright_maxlvl; /* 0 = unknown */
377
378 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
379 static int dbg_wlswemul;
380 static bool tpacpi_wlsw_emulstate;
381 static int dbg_bluetoothemul;
382 static bool tpacpi_bluetooth_emulstate;
383 static int dbg_wwanemul;
384 static bool tpacpi_wwan_emulstate;
385 static int dbg_uwbemul;
386 static bool tpacpi_uwb_emulstate;
387 #endif
388
389
390 /*************************************************************************
391 * Debugging helpers
392 */
393
394 #define dbg_printk(a_dbg_level, format, arg...) \
395 do { \
396 if (dbg_level & (a_dbg_level)) \
397 printk(KERN_DEBUG pr_fmt("%s: " format), \
398 __func__, ##arg); \
399 } while (0)
400
401 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
402 #define vdbg_printk dbg_printk
403 static const char *str_supported(int is_supported);
404 #else
405 static inline const char *str_supported(int is_supported) { return ""; }
406 #define vdbg_printk(a_dbg_level, format, arg...) \
407 no_printk(format, ##arg)
408 #endif
409
410 static void tpacpi_log_usertask(const char * const what)
411 {
412 printk(KERN_DEBUG pr_fmt("%s: access by process with PID %d\n"),
413 what, task_tgid_vnr(current));
414 }
415
416 #define tpacpi_disclose_usertask(what, format, arg...) \
417 do { \
418 if (unlikely((dbg_level & TPACPI_DBG_DISCLOSETASK) && \
419 (tpacpi_lifecycle == TPACPI_LIFE_RUNNING))) { \
420 printk(KERN_DEBUG pr_fmt("%s: PID %d: " format), \
421 what, task_tgid_vnr(current), ## arg); \
422 } \
423 } while (0)
424
425 /*
426 * Quirk handling helpers
427 *
428 * ThinkPad IDs and versions seen in the field so far
429 * are two-characters from the set [0-9A-Z], i.e. base 36.
430 *
431 * We use values well outside that range as specials.
432 */
433
434 #define TPACPI_MATCH_ANY 0xffffU
435 #define TPACPI_MATCH_UNKNOWN 0U
436
437 /* TPID('1', 'Y') == 0x5931 */
438 #define TPID(__c1, __c2) (((__c2) << 8) | (__c1))
439
440 #define TPACPI_Q_IBM(__id1, __id2, __quirk) \
441 { .vendor = PCI_VENDOR_ID_IBM, \
442 .bios = TPID(__id1, __id2), \
443 .ec = TPACPI_MATCH_ANY, \
444 .quirks = (__quirk) }
445
446 #define TPACPI_Q_LNV(__id1, __id2, __quirk) \
447 { .vendor = PCI_VENDOR_ID_LENOVO, \
448 .bios = TPID(__id1, __id2), \
449 .ec = TPACPI_MATCH_ANY, \
450 .quirks = (__quirk) }
451
452 #define TPACPI_QEC_LNV(__id1, __id2, __quirk) \
453 { .vendor = PCI_VENDOR_ID_LENOVO, \
454 .bios = TPACPI_MATCH_ANY, \
455 .ec = TPID(__id1, __id2), \
456 .quirks = (__quirk) }
457
458 struct tpacpi_quirk {
459 unsigned int vendor;
460 u16 bios;
461 u16 ec;
462 unsigned long quirks;
463 };
464
465 /**
466 * tpacpi_check_quirks() - search BIOS/EC version on a list
467 * @qlist: array of &struct tpacpi_quirk
468 * @qlist_size: number of elements in @qlist
469 *
470 * Iterates over a quirks list until one is found that matches the
471 * ThinkPad's vendor, BIOS and EC model.
472 *
473 * Returns 0 if nothing matches, otherwise returns the quirks field of
474 * the matching &struct tpacpi_quirk entry.
475 *
476 * The match criteria is: vendor, ec and bios much match.
477 */
478 static unsigned long __init tpacpi_check_quirks(
479 const struct tpacpi_quirk *qlist,
480 unsigned int qlist_size)
481 {
482 while (qlist_size) {
483 if ((qlist->vendor == thinkpad_id.vendor ||
484 qlist->vendor == TPACPI_MATCH_ANY) &&
485 (qlist->bios == thinkpad_id.bios_model ||
486 qlist->bios == TPACPI_MATCH_ANY) &&
487 (qlist->ec == thinkpad_id.ec_model ||
488 qlist->ec == TPACPI_MATCH_ANY))
489 return qlist->quirks;
490
491 qlist_size--;
492 qlist++;
493 }
494 return 0;
495 }
496
497 static inline bool __pure __init tpacpi_is_lenovo(void)
498 {
499 return thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO;
500 }
501
502 static inline bool __pure __init tpacpi_is_ibm(void)
503 {
504 return thinkpad_id.vendor == PCI_VENDOR_ID_IBM;
505 }
506
507 /****************************************************************************
508 ****************************************************************************
509 *
510 * ACPI Helpers and device model
511 *
512 ****************************************************************************
513 ****************************************************************************/
514
515 /*************************************************************************
516 * ACPI basic handles
517 */
518
519 static acpi_handle root_handle;
520 static acpi_handle ec_handle;
521
522 #define TPACPI_HANDLE(object, parent, paths...) \
523 static acpi_handle object##_handle; \
524 static const acpi_handle * const object##_parent __initconst = \
525 &parent##_handle; \
526 static char *object##_paths[] __initdata = { paths }
527
528 TPACPI_HANDLE(ecrd, ec, "ECRD"); /* 570 */
529 TPACPI_HANDLE(ecwr, ec, "ECWR"); /* 570 */
530
531 TPACPI_HANDLE(cmos, root, "\\UCMS", /* R50, R50e, R50p, R51, */
532 /* T4x, X31, X40 */
533 "\\CMOS", /* A3x, G4x, R32, T23, T30, X22-24, X30 */
534 "\\CMS", /* R40, R40e */
535 ); /* all others */
536
537 TPACPI_HANDLE(hkey, ec, "\\_SB.HKEY", /* 600e/x, 770e, 770x */
538 "^HKEY", /* R30, R31 */
539 "HKEY", /* all others */
540 ); /* 570 */
541
542 /*************************************************************************
543 * ACPI helpers
544 */
545
546 static int acpi_evalf(acpi_handle handle,
547 int *res, char *method, char *fmt, ...)
548 {
549 char *fmt0 = fmt;
550 struct acpi_object_list params;
551 union acpi_object in_objs[TPACPI_MAX_ACPI_ARGS];
552 struct acpi_buffer result, *resultp;
553 union acpi_object out_obj;
554 acpi_status status;
555 va_list ap;
556 char res_type;
557 int success;
558 int quiet;
559
560 if (!*fmt) {
561 pr_err("acpi_evalf() called with empty format\n");
562 return 0;
563 }
564
565 if (*fmt == 'q') {
566 quiet = 1;
567 fmt++;
568 } else
569 quiet = 0;
570
571 res_type = *(fmt++);
572
573 params.count = 0;
574 params.pointer = &in_objs[0];
575
576 va_start(ap, fmt);
577 while (*fmt) {
578 char c = *(fmt++);
579 switch (c) {
580 case 'd': /* int */
581 in_objs[params.count].integer.value = va_arg(ap, int);
582 in_objs[params.count++].type = ACPI_TYPE_INTEGER;
583 break;
584 /* add more types as needed */
585 default:
586 pr_err("acpi_evalf() called "
587 "with invalid format character '%c'\n", c);
588 va_end(ap);
589 return 0;
590 }
591 }
592 va_end(ap);
593
594 if (res_type != 'v') {
595 result.length = sizeof(out_obj);
596 result.pointer = &out_obj;
597 resultp = &result;
598 } else
599 resultp = NULL;
600
601 status = acpi_evaluate_object(handle, method, &params, resultp);
602
603 switch (res_type) {
604 case 'd': /* int */
605 success = (status == AE_OK &&
606 out_obj.type == ACPI_TYPE_INTEGER);
607 if (success && res)
608 *res = out_obj.integer.value;
609 break;
610 case 'v': /* void */
611 success = status == AE_OK;
612 break;
613 /* add more types as needed */
614 default:
615 pr_err("acpi_evalf() called "
616 "with invalid format character '%c'\n", res_type);
617 return 0;
618 }
619
620 if (!success && !quiet)
621 pr_err("acpi_evalf(%s, %s, ...) failed: %s\n",
622 method, fmt0, acpi_format_exception(status));
623
624 return success;
625 }
626
627 static int acpi_ec_read(int i, u8 *p)
628 {
629 int v;
630
631 if (ecrd_handle) {
632 if (!acpi_evalf(ecrd_handle, &v, NULL, "dd", i))
633 return 0;
634 *p = v;
635 } else {
636 if (ec_read(i, p) < 0)
637 return 0;
638 }
639
640 return 1;
641 }
642
643 static int acpi_ec_write(int i, u8 v)
644 {
645 if (ecwr_handle) {
646 if (!acpi_evalf(ecwr_handle, NULL, NULL, "vdd", i, v))
647 return 0;
648 } else {
649 if (ec_write(i, v) < 0)
650 return 0;
651 }
652
653 return 1;
654 }
655
656 static int issue_thinkpad_cmos_command(int cmos_cmd)
657 {
658 if (!cmos_handle)
659 return -ENXIO;
660
661 if (!acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd))
662 return -EIO;
663
664 return 0;
665 }
666
667 /*************************************************************************
668 * ACPI device model
669 */
670
671 #define TPACPI_ACPIHANDLE_INIT(object) \
672 drv_acpi_handle_init(#object, &object##_handle, *object##_parent, \
673 object##_paths, ARRAY_SIZE(object##_paths))
674
675 static void __init drv_acpi_handle_init(const char *name,
676 acpi_handle *handle, const acpi_handle parent,
677 char **paths, const int num_paths)
678 {
679 int i;
680 acpi_status status;
681
682 vdbg_printk(TPACPI_DBG_INIT, "trying to locate ACPI handle for %s\n",
683 name);
684
685 for (i = 0; i < num_paths; i++) {
686 status = acpi_get_handle(parent, paths[i], handle);
687 if (ACPI_SUCCESS(status)) {
688 dbg_printk(TPACPI_DBG_INIT,
689 "Found ACPI handle %s for %s\n",
690 paths[i], name);
691 return;
692 }
693 }
694
695 vdbg_printk(TPACPI_DBG_INIT, "ACPI handle for %s not found\n",
696 name);
697 *handle = NULL;
698 }
699
700 static acpi_status __init tpacpi_acpi_handle_locate_callback(acpi_handle handle,
701 u32 level, void *context, void **return_value)
702 {
703 *(acpi_handle *)return_value = handle;
704
705 return AE_CTRL_TERMINATE;
706 }
707
708 static void __init tpacpi_acpi_handle_locate(const char *name,
709 const char *hid,
710 acpi_handle *handle)
711 {
712 acpi_status status;
713 acpi_handle device_found;
714
715 BUG_ON(!name || !hid || !handle);
716 vdbg_printk(TPACPI_DBG_INIT,
717 "trying to locate ACPI handle for %s, using HID %s\n",
718 name, hid);
719
720 memset(&device_found, 0, sizeof(device_found));
721 status = acpi_get_devices(hid, tpacpi_acpi_handle_locate_callback,
722 (void *)name, &device_found);
723
724 *handle = NULL;
725
726 if (ACPI_SUCCESS(status)) {
727 *handle = device_found;
728 dbg_printk(TPACPI_DBG_INIT,
729 "Found ACPI handle for %s\n", name);
730 } else {
731 vdbg_printk(TPACPI_DBG_INIT,
732 "Could not locate an ACPI handle for %s: %s\n",
733 name, acpi_format_exception(status));
734 }
735 }
736
737 static void dispatch_acpi_notify(acpi_handle handle, u32 event, void *data)
738 {
739 struct ibm_struct *ibm = data;
740
741 if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
742 return;
743
744 if (!ibm || !ibm->acpi || !ibm->acpi->notify)
745 return;
746
747 ibm->acpi->notify(ibm, event);
748 }
749
750 static int __init setup_acpi_notify(struct ibm_struct *ibm)
751 {
752 acpi_status status;
753 int rc;
754
755 BUG_ON(!ibm->acpi);
756
757 if (!*ibm->acpi->handle)
758 return 0;
759
760 vdbg_printk(TPACPI_DBG_INIT,
761 "setting up ACPI notify for %s\n", ibm->name);
762
763 rc = acpi_bus_get_device(*ibm->acpi->handle, &ibm->acpi->device);
764 if (rc < 0) {
765 pr_err("acpi_bus_get_device(%s) failed: %d\n", ibm->name, rc);
766 return -ENODEV;
767 }
768
769 ibm->acpi->device->driver_data = ibm;
770 sprintf(acpi_device_class(ibm->acpi->device), "%s/%s",
771 TPACPI_ACPI_EVENT_PREFIX,
772 ibm->name);
773
774 status = acpi_install_notify_handler(*ibm->acpi->handle,
775 ibm->acpi->type, dispatch_acpi_notify, ibm);
776 if (ACPI_FAILURE(status)) {
777 if (status == AE_ALREADY_EXISTS) {
778 pr_notice("another device driver is already "
779 "handling %s events\n", ibm->name);
780 } else {
781 pr_err("acpi_install_notify_handler(%s) failed: %s\n",
782 ibm->name, acpi_format_exception(status));
783 }
784 return -ENODEV;
785 }
786 ibm->flags.acpi_notify_installed = 1;
787 return 0;
788 }
789
790 static int __init tpacpi_device_add(struct acpi_device *device)
791 {
792 return 0;
793 }
794
795 static int __init register_tpacpi_subdriver(struct ibm_struct *ibm)
796 {
797 int rc;
798
799 dbg_printk(TPACPI_DBG_INIT,
800 "registering %s as an ACPI driver\n", ibm->name);
801
802 BUG_ON(!ibm->acpi);
803
804 ibm->acpi->driver = kzalloc(sizeof(struct acpi_driver), GFP_KERNEL);
805 if (!ibm->acpi->driver) {
806 pr_err("failed to allocate memory for ibm->acpi->driver\n");
807 return -ENOMEM;
808 }
809
810 sprintf(ibm->acpi->driver->name, "%s_%s", TPACPI_NAME, ibm->name);
811 ibm->acpi->driver->ids = ibm->acpi->hid;
812
813 ibm->acpi->driver->ops.add = &tpacpi_device_add;
814
815 rc = acpi_bus_register_driver(ibm->acpi->driver);
816 if (rc < 0) {
817 pr_err("acpi_bus_register_driver(%s) failed: %d\n",
818 ibm->name, rc);
819 kfree(ibm->acpi->driver);
820 ibm->acpi->driver = NULL;
821 } else if (!rc)
822 ibm->flags.acpi_driver_registered = 1;
823
824 return rc;
825 }
826
827
828 /****************************************************************************
829 ****************************************************************************
830 *
831 * Procfs Helpers
832 *
833 ****************************************************************************
834 ****************************************************************************/
835
836 static int dispatch_proc_show(struct seq_file *m, void *v)
837 {
838 struct ibm_struct *ibm = m->private;
839
840 if (!ibm || !ibm->read)
841 return -EINVAL;
842 return ibm->read(m);
843 }
844
845 static int dispatch_proc_open(struct inode *inode, struct file *file)
846 {
847 return single_open(file, dispatch_proc_show, PDE_DATA(inode));
848 }
849
850 static ssize_t dispatch_proc_write(struct file *file,
851 const char __user *userbuf,
852 size_t count, loff_t *pos)
853 {
854 struct ibm_struct *ibm = PDE_DATA(file_inode(file));
855 char *kernbuf;
856 int ret;
857
858 if (!ibm || !ibm->write)
859 return -EINVAL;
860 if (count > PAGE_SIZE - 2)
861 return -EINVAL;
862
863 kernbuf = kmalloc(count + 2, GFP_KERNEL);
864 if (!kernbuf)
865 return -ENOMEM;
866
867 if (copy_from_user(kernbuf, userbuf, count)) {
868 kfree(kernbuf);
869 return -EFAULT;
870 }
871
872 kernbuf[count] = 0;
873 strcat(kernbuf, ",");
874 ret = ibm->write(kernbuf);
875 if (ret == 0)
876 ret = count;
877
878 kfree(kernbuf);
879
880 return ret;
881 }
882
883 static const struct file_operations dispatch_proc_fops = {
884 .owner = THIS_MODULE,
885 .open = dispatch_proc_open,
886 .read = seq_read,
887 .llseek = seq_lseek,
888 .release = single_release,
889 .write = dispatch_proc_write,
890 };
891
892 static char *next_cmd(char **cmds)
893 {
894 char *start = *cmds;
895 char *end;
896
897 while ((end = strchr(start, ',')) && end == start)
898 start = end + 1;
899
900 if (!end)
901 return NULL;
902
903 *end = 0;
904 *cmds = end + 1;
905 return start;
906 }
907
908
909 /****************************************************************************
910 ****************************************************************************
911 *
912 * Device model: input, hwmon and platform
913 *
914 ****************************************************************************
915 ****************************************************************************/
916
917 static struct platform_device *tpacpi_pdev;
918 static struct platform_device *tpacpi_sensors_pdev;
919 static struct device *tpacpi_hwmon;
920 static struct input_dev *tpacpi_inputdev;
921 static struct mutex tpacpi_inputdev_send_mutex;
922 static LIST_HEAD(tpacpi_all_drivers);
923
924 #ifdef CONFIG_PM_SLEEP
925 static int tpacpi_suspend_handler(struct device *dev)
926 {
927 struct ibm_struct *ibm, *itmp;
928
929 list_for_each_entry_safe(ibm, itmp,
930 &tpacpi_all_drivers,
931 all_drivers) {
932 if (ibm->suspend)
933 (ibm->suspend)();
934 }
935
936 return 0;
937 }
938
939 static int tpacpi_resume_handler(struct device *dev)
940 {
941 struct ibm_struct *ibm, *itmp;
942
943 list_for_each_entry_safe(ibm, itmp,
944 &tpacpi_all_drivers,
945 all_drivers) {
946 if (ibm->resume)
947 (ibm->resume)();
948 }
949
950 return 0;
951 }
952 #endif
953
954 static SIMPLE_DEV_PM_OPS(tpacpi_pm,
955 tpacpi_suspend_handler, tpacpi_resume_handler);
956
957 static void tpacpi_shutdown_handler(struct platform_device *pdev)
958 {
959 struct ibm_struct *ibm, *itmp;
960
961 list_for_each_entry_safe(ibm, itmp,
962 &tpacpi_all_drivers,
963 all_drivers) {
964 if (ibm->shutdown)
965 (ibm->shutdown)();
966 }
967 }
968
969 static struct platform_driver tpacpi_pdriver = {
970 .driver = {
971 .name = TPACPI_DRVR_NAME,
972 .owner = THIS_MODULE,
973 .pm = &tpacpi_pm,
974 },
975 .shutdown = tpacpi_shutdown_handler,
976 };
977
978 static struct platform_driver tpacpi_hwmon_pdriver = {
979 .driver = {
980 .name = TPACPI_HWMON_DRVR_NAME,
981 .owner = THIS_MODULE,
982 },
983 };
984
985 /*************************************************************************
986 * sysfs support helpers
987 */
988
989 struct attribute_set {
990 unsigned int members, max_members;
991 struct attribute_group group;
992 };
993
994 struct attribute_set_obj {
995 struct attribute_set s;
996 struct attribute *a;
997 } __attribute__((packed));
998
999 static struct attribute_set *create_attr_set(unsigned int max_members,
1000 const char *name)
1001 {
1002 struct attribute_set_obj *sobj;
1003
1004 if (max_members == 0)
1005 return NULL;
1006
1007 /* Allocates space for implicit NULL at the end too */
1008 sobj = kzalloc(sizeof(struct attribute_set_obj) +
1009 max_members * sizeof(struct attribute *),
1010 GFP_KERNEL);
1011 if (!sobj)
1012 return NULL;
1013 sobj->s.max_members = max_members;
1014 sobj->s.group.attrs = &sobj->a;
1015 sobj->s.group.name = name;
1016
1017 return &sobj->s;
1018 }
1019
1020 #define destroy_attr_set(_set) \
1021 kfree(_set);
1022
1023 /* not multi-threaded safe, use it in a single thread per set */
1024 static int add_to_attr_set(struct attribute_set *s, struct attribute *attr)
1025 {
1026 if (!s || !attr)
1027 return -EINVAL;
1028
1029 if (s->members >= s->max_members)
1030 return -ENOMEM;
1031
1032 s->group.attrs[s->members] = attr;
1033 s->members++;
1034
1035 return 0;
1036 }
1037
1038 static int add_many_to_attr_set(struct attribute_set *s,
1039 struct attribute **attr,
1040 unsigned int count)
1041 {
1042 int i, res;
1043
1044 for (i = 0; i < count; i++) {
1045 res = add_to_attr_set(s, attr[i]);
1046 if (res)
1047 return res;
1048 }
1049
1050 return 0;
1051 }
1052
1053 static void delete_attr_set(struct attribute_set *s, struct kobject *kobj)
1054 {
1055 sysfs_remove_group(kobj, &s->group);
1056 destroy_attr_set(s);
1057 }
1058
1059 #define register_attr_set_with_sysfs(_attr_set, _kobj) \
1060 sysfs_create_group(_kobj, &_attr_set->group)
1061
1062 static int parse_strtoul(const char *buf,
1063 unsigned long max, unsigned long *value)
1064 {
1065 char *endp;
1066
1067 *value = simple_strtoul(skip_spaces(buf), &endp, 0);
1068 endp = skip_spaces(endp);
1069 if (*endp || *value > max)
1070 return -EINVAL;
1071
1072 return 0;
1073 }
1074
1075 static void tpacpi_disable_brightness_delay(void)
1076 {
1077 if (acpi_evalf(hkey_handle, NULL, "PWMS", "qvd", 0))
1078 pr_notice("ACPI backlight control delay disabled\n");
1079 }
1080
1081 static void printk_deprecated_attribute(const char * const what,
1082 const char * const details)
1083 {
1084 tpacpi_log_usertask("deprecated sysfs attribute");
1085 pr_warn("WARNING: sysfs attribute %s is deprecated and "
1086 "will be removed. %s\n",
1087 what, details);
1088 }
1089
1090 /*************************************************************************
1091 * rfkill and radio control support helpers
1092 */
1093
1094 /*
1095 * ThinkPad-ACPI firmware handling model:
1096 *
1097 * WLSW (master wireless switch) is event-driven, and is common to all
1098 * firmware-controlled radios. It cannot be controlled, just monitored,
1099 * as expected. It overrides all radio state in firmware
1100 *
1101 * The kernel, a masked-off hotkey, and WLSW can change the radio state
1102 * (TODO: verify how WLSW interacts with the returned radio state).
1103 *
1104 * The only time there are shadow radio state changes, is when
1105 * masked-off hotkeys are used.
1106 */
1107
1108 /*
1109 * Internal driver API for radio state:
1110 *
1111 * int: < 0 = error, otherwise enum tpacpi_rfkill_state
1112 * bool: true means radio blocked (off)
1113 */
1114 enum tpacpi_rfkill_state {
1115 TPACPI_RFK_RADIO_OFF = 0,
1116 TPACPI_RFK_RADIO_ON
1117 };
1118
1119 /* rfkill switches */
1120 enum tpacpi_rfk_id {
1121 TPACPI_RFK_BLUETOOTH_SW_ID = 0,
1122 TPACPI_RFK_WWAN_SW_ID,
1123 TPACPI_RFK_UWB_SW_ID,
1124 TPACPI_RFK_SW_MAX
1125 };
1126
1127 static const char *tpacpi_rfkill_names[] = {
1128 [TPACPI_RFK_BLUETOOTH_SW_ID] = "bluetooth",
1129 [TPACPI_RFK_WWAN_SW_ID] = "wwan",
1130 [TPACPI_RFK_UWB_SW_ID] = "uwb",
1131 [TPACPI_RFK_SW_MAX] = NULL
1132 };
1133
1134 /* ThinkPad-ACPI rfkill subdriver */
1135 struct tpacpi_rfk {
1136 struct rfkill *rfkill;
1137 enum tpacpi_rfk_id id;
1138 const struct tpacpi_rfk_ops *ops;
1139 };
1140
1141 struct tpacpi_rfk_ops {
1142 /* firmware interface */
1143 int (*get_status)(void);
1144 int (*set_status)(const enum tpacpi_rfkill_state);
1145 };
1146
1147 static struct tpacpi_rfk *tpacpi_rfkill_switches[TPACPI_RFK_SW_MAX];
1148
1149 /* Query FW and update rfkill sw state for a given rfkill switch */
1150 static int tpacpi_rfk_update_swstate(const struct tpacpi_rfk *tp_rfk)
1151 {
1152 int status;
1153
1154 if (!tp_rfk)
1155 return -ENODEV;
1156
1157 status = (tp_rfk->ops->get_status)();
1158 if (status < 0)
1159 return status;
1160
1161 rfkill_set_sw_state(tp_rfk->rfkill,
1162 (status == TPACPI_RFK_RADIO_OFF));
1163
1164 return status;
1165 }
1166
1167 /* Query FW and update rfkill sw state for all rfkill switches */
1168 static void tpacpi_rfk_update_swstate_all(void)
1169 {
1170 unsigned int i;
1171
1172 for (i = 0; i < TPACPI_RFK_SW_MAX; i++)
1173 tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[i]);
1174 }
1175
1176 /*
1177 * Sync the HW-blocking state of all rfkill switches,
1178 * do notice it causes the rfkill core to schedule uevents
1179 */
1180 static void tpacpi_rfk_update_hwblock_state(bool blocked)
1181 {
1182 unsigned int i;
1183 struct tpacpi_rfk *tp_rfk;
1184
1185 for (i = 0; i < TPACPI_RFK_SW_MAX; i++) {
1186 tp_rfk = tpacpi_rfkill_switches[i];
1187 if (tp_rfk) {
1188 if (rfkill_set_hw_state(tp_rfk->rfkill,
1189 blocked)) {
1190 /* ignore -- we track sw block */
1191 }
1192 }
1193 }
1194 }
1195
1196 /* Call to get the WLSW state from the firmware */
1197 static int hotkey_get_wlsw(void);
1198
1199 /* Call to query WLSW state and update all rfkill switches */
1200 static bool tpacpi_rfk_check_hwblock_state(void)
1201 {
1202 int res = hotkey_get_wlsw();
1203 int hw_blocked;
1204
1205 /* When unknown or unsupported, we have to assume it is unblocked */
1206 if (res < 0)
1207 return false;
1208
1209 hw_blocked = (res == TPACPI_RFK_RADIO_OFF);
1210 tpacpi_rfk_update_hwblock_state(hw_blocked);
1211
1212 return hw_blocked;
1213 }
1214
1215 static int tpacpi_rfk_hook_set_block(void *data, bool blocked)
1216 {
1217 struct tpacpi_rfk *tp_rfk = data;
1218 int res;
1219
1220 dbg_printk(TPACPI_DBG_RFKILL,
1221 "request to change radio state to %s\n",
1222 blocked ? "blocked" : "unblocked");
1223
1224 /* try to set radio state */
1225 res = (tp_rfk->ops->set_status)(blocked ?
1226 TPACPI_RFK_RADIO_OFF : TPACPI_RFK_RADIO_ON);
1227
1228 /* and update the rfkill core with whatever the FW really did */
1229 tpacpi_rfk_update_swstate(tp_rfk);
1230
1231 return (res < 0) ? res : 0;
1232 }
1233
1234 static const struct rfkill_ops tpacpi_rfk_rfkill_ops = {
1235 .set_block = tpacpi_rfk_hook_set_block,
1236 };
1237
1238 static int __init tpacpi_new_rfkill(const enum tpacpi_rfk_id id,
1239 const struct tpacpi_rfk_ops *tp_rfkops,
1240 const enum rfkill_type rfktype,
1241 const char *name,
1242 const bool set_default)
1243 {
1244 struct tpacpi_rfk *atp_rfk;
1245 int res;
1246 bool sw_state = false;
1247 bool hw_state;
1248 int sw_status;
1249
1250 BUG_ON(id >= TPACPI_RFK_SW_MAX || tpacpi_rfkill_switches[id]);
1251
1252 atp_rfk = kzalloc(sizeof(struct tpacpi_rfk), GFP_KERNEL);
1253 if (atp_rfk)
1254 atp_rfk->rfkill = rfkill_alloc(name,
1255 &tpacpi_pdev->dev,
1256 rfktype,
1257 &tpacpi_rfk_rfkill_ops,
1258 atp_rfk);
1259 if (!atp_rfk || !atp_rfk->rfkill) {
1260 pr_err("failed to allocate memory for rfkill class\n");
1261 kfree(atp_rfk);
1262 return -ENOMEM;
1263 }
1264
1265 atp_rfk->id = id;
1266 atp_rfk->ops = tp_rfkops;
1267
1268 sw_status = (tp_rfkops->get_status)();
1269 if (sw_status < 0) {
1270 pr_err("failed to read initial state for %s, error %d\n",
1271 name, sw_status);
1272 } else {
1273 sw_state = (sw_status == TPACPI_RFK_RADIO_OFF);
1274 if (set_default) {
1275 /* try to keep the initial state, since we ask the
1276 * firmware to preserve it across S5 in NVRAM */
1277 rfkill_init_sw_state(atp_rfk->rfkill, sw_state);
1278 }
1279 }
1280 hw_state = tpacpi_rfk_check_hwblock_state();
1281 rfkill_set_hw_state(atp_rfk->rfkill, hw_state);
1282
1283 res = rfkill_register(atp_rfk->rfkill);
1284 if (res < 0) {
1285 pr_err("failed to register %s rfkill switch: %d\n", name, res);
1286 rfkill_destroy(atp_rfk->rfkill);
1287 kfree(atp_rfk);
1288 return res;
1289 }
1290
1291 tpacpi_rfkill_switches[id] = atp_rfk;
1292
1293 pr_info("rfkill switch %s: radio is %sblocked\n",
1294 name, (sw_state || hw_state) ? "" : "un");
1295 return 0;
1296 }
1297
1298 static void tpacpi_destroy_rfkill(const enum tpacpi_rfk_id id)
1299 {
1300 struct tpacpi_rfk *tp_rfk;
1301
1302 BUG_ON(id >= TPACPI_RFK_SW_MAX);
1303
1304 tp_rfk = tpacpi_rfkill_switches[id];
1305 if (tp_rfk) {
1306 rfkill_unregister(tp_rfk->rfkill);
1307 rfkill_destroy(tp_rfk->rfkill);
1308 tpacpi_rfkill_switches[id] = NULL;
1309 kfree(tp_rfk);
1310 }
1311 }
1312
1313 static void printk_deprecated_rfkill_attribute(const char * const what)
1314 {
1315 printk_deprecated_attribute(what,
1316 "Please switch to generic rfkill before year 2010");
1317 }
1318
1319 /* sysfs <radio> enable ------------------------------------------------ */
1320 static ssize_t tpacpi_rfk_sysfs_enable_show(const enum tpacpi_rfk_id id,
1321 struct device_attribute *attr,
1322 char *buf)
1323 {
1324 int status;
1325
1326 printk_deprecated_rfkill_attribute(attr->attr.name);
1327
1328 /* This is in the ABI... */
1329 if (tpacpi_rfk_check_hwblock_state()) {
1330 status = TPACPI_RFK_RADIO_OFF;
1331 } else {
1332 status = tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]);
1333 if (status < 0)
1334 return status;
1335 }
1336
1337 return snprintf(buf, PAGE_SIZE, "%d\n",
1338 (status == TPACPI_RFK_RADIO_ON) ? 1 : 0);
1339 }
1340
1341 static ssize_t tpacpi_rfk_sysfs_enable_store(const enum tpacpi_rfk_id id,
1342 struct device_attribute *attr,
1343 const char *buf, size_t count)
1344 {
1345 unsigned long t;
1346 int res;
1347
1348 printk_deprecated_rfkill_attribute(attr->attr.name);
1349
1350 if (parse_strtoul(buf, 1, &t))
1351 return -EINVAL;
1352
1353 tpacpi_disclose_usertask(attr->attr.name, "set to %ld\n", t);
1354
1355 /* This is in the ABI... */
1356 if (tpacpi_rfk_check_hwblock_state() && !!t)
1357 return -EPERM;
1358
1359 res = tpacpi_rfkill_switches[id]->ops->set_status((!!t) ?
1360 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF);
1361 tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]);
1362
1363 return (res < 0) ? res : count;
1364 }
1365
1366 /* procfs -------------------------------------------------------------- */
1367 static int tpacpi_rfk_procfs_read(const enum tpacpi_rfk_id id, struct seq_file *m)
1368 {
1369 if (id >= TPACPI_RFK_SW_MAX)
1370 seq_printf(m, "status:\t\tnot supported\n");
1371 else {
1372 int status;
1373
1374 /* This is in the ABI... */
1375 if (tpacpi_rfk_check_hwblock_state()) {
1376 status = TPACPI_RFK_RADIO_OFF;
1377 } else {
1378 status = tpacpi_rfk_update_swstate(
1379 tpacpi_rfkill_switches[id]);
1380 if (status < 0)
1381 return status;
1382 }
1383
1384 seq_printf(m, "status:\t\t%s\n",
1385 (status == TPACPI_RFK_RADIO_ON) ?
1386 "enabled" : "disabled");
1387 seq_printf(m, "commands:\tenable, disable\n");
1388 }
1389
1390 return 0;
1391 }
1392
1393 static int tpacpi_rfk_procfs_write(const enum tpacpi_rfk_id id, char *buf)
1394 {
1395 char *cmd;
1396 int status = -1;
1397 int res = 0;
1398
1399 if (id >= TPACPI_RFK_SW_MAX)
1400 return -ENODEV;
1401
1402 while ((cmd = next_cmd(&buf))) {
1403 if (strlencmp(cmd, "enable") == 0)
1404 status = TPACPI_RFK_RADIO_ON;
1405 else if (strlencmp(cmd, "disable") == 0)
1406 status = TPACPI_RFK_RADIO_OFF;
1407 else
1408 return -EINVAL;
1409 }
1410
1411 if (status != -1) {
1412 tpacpi_disclose_usertask("procfs", "attempt to %s %s\n",
1413 (status == TPACPI_RFK_RADIO_ON) ?
1414 "enable" : "disable",
1415 tpacpi_rfkill_names[id]);
1416 res = (tpacpi_rfkill_switches[id]->ops->set_status)(status);
1417 tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]);
1418 }
1419
1420 return res;
1421 }
1422
1423 /*************************************************************************
1424 * thinkpad-acpi driver attributes
1425 */
1426
1427 /* interface_version --------------------------------------------------- */
1428 static ssize_t tpacpi_driver_interface_version_show(
1429 struct device_driver *drv,
1430 char *buf)
1431 {
1432 return snprintf(buf, PAGE_SIZE, "0x%08x\n", TPACPI_SYSFS_VERSION);
1433 }
1434
1435 static DRIVER_ATTR(interface_version, S_IRUGO,
1436 tpacpi_driver_interface_version_show, NULL);
1437
1438 /* debug_level --------------------------------------------------------- */
1439 static ssize_t tpacpi_driver_debug_show(struct device_driver *drv,
1440 char *buf)
1441 {
1442 return snprintf(buf, PAGE_SIZE, "0x%04x\n", dbg_level);
1443 }
1444
1445 static ssize_t tpacpi_driver_debug_store(struct device_driver *drv,
1446 const char *buf, size_t count)
1447 {
1448 unsigned long t;
1449
1450 if (parse_strtoul(buf, 0xffff, &t))
1451 return -EINVAL;
1452
1453 dbg_level = t;
1454
1455 return count;
1456 }
1457
1458 static DRIVER_ATTR(debug_level, S_IWUSR | S_IRUGO,
1459 tpacpi_driver_debug_show, tpacpi_driver_debug_store);
1460
1461 /* version ------------------------------------------------------------- */
1462 static ssize_t tpacpi_driver_version_show(struct device_driver *drv,
1463 char *buf)
1464 {
1465 return snprintf(buf, PAGE_SIZE, "%s v%s\n",
1466 TPACPI_DESC, TPACPI_VERSION);
1467 }
1468
1469 static DRIVER_ATTR(version, S_IRUGO,
1470 tpacpi_driver_version_show, NULL);
1471
1472 /* --------------------------------------------------------------------- */
1473
1474 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
1475
1476 /* wlsw_emulstate ------------------------------------------------------ */
1477 static ssize_t tpacpi_driver_wlsw_emulstate_show(struct device_driver *drv,
1478 char *buf)
1479 {
1480 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_wlsw_emulstate);
1481 }
1482
1483 static ssize_t tpacpi_driver_wlsw_emulstate_store(struct device_driver *drv,
1484 const char *buf, size_t count)
1485 {
1486 unsigned long t;
1487
1488 if (parse_strtoul(buf, 1, &t))
1489 return -EINVAL;
1490
1491 if (tpacpi_wlsw_emulstate != !!t) {
1492 tpacpi_wlsw_emulstate = !!t;
1493 tpacpi_rfk_update_hwblock_state(!t); /* negative logic */
1494 }
1495
1496 return count;
1497 }
1498
1499 static DRIVER_ATTR(wlsw_emulstate, S_IWUSR | S_IRUGO,
1500 tpacpi_driver_wlsw_emulstate_show,
1501 tpacpi_driver_wlsw_emulstate_store);
1502
1503 /* bluetooth_emulstate ------------------------------------------------- */
1504 static ssize_t tpacpi_driver_bluetooth_emulstate_show(
1505 struct device_driver *drv,
1506 char *buf)
1507 {
1508 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_bluetooth_emulstate);
1509 }
1510
1511 static ssize_t tpacpi_driver_bluetooth_emulstate_store(
1512 struct device_driver *drv,
1513 const char *buf, size_t count)
1514 {
1515 unsigned long t;
1516
1517 if (parse_strtoul(buf, 1, &t))
1518 return -EINVAL;
1519
1520 tpacpi_bluetooth_emulstate = !!t;
1521
1522 return count;
1523 }
1524
1525 static DRIVER_ATTR(bluetooth_emulstate, S_IWUSR | S_IRUGO,
1526 tpacpi_driver_bluetooth_emulstate_show,
1527 tpacpi_driver_bluetooth_emulstate_store);
1528
1529 /* wwan_emulstate ------------------------------------------------- */
1530 static ssize_t tpacpi_driver_wwan_emulstate_show(
1531 struct device_driver *drv,
1532 char *buf)
1533 {
1534 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_wwan_emulstate);
1535 }
1536
1537 static ssize_t tpacpi_driver_wwan_emulstate_store(
1538 struct device_driver *drv,
1539 const char *buf, size_t count)
1540 {
1541 unsigned long t;
1542
1543 if (parse_strtoul(buf, 1, &t))
1544 return -EINVAL;
1545
1546 tpacpi_wwan_emulstate = !!t;
1547
1548 return count;
1549 }
1550
1551 static DRIVER_ATTR(wwan_emulstate, S_IWUSR | S_IRUGO,
1552 tpacpi_driver_wwan_emulstate_show,
1553 tpacpi_driver_wwan_emulstate_store);
1554
1555 /* uwb_emulstate ------------------------------------------------- */
1556 static ssize_t tpacpi_driver_uwb_emulstate_show(
1557 struct device_driver *drv,
1558 char *buf)
1559 {
1560 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_uwb_emulstate);
1561 }
1562
1563 static ssize_t tpacpi_driver_uwb_emulstate_store(
1564 struct device_driver *drv,
1565 const char *buf, size_t count)
1566 {
1567 unsigned long t;
1568
1569 if (parse_strtoul(buf, 1, &t))
1570 return -EINVAL;
1571
1572 tpacpi_uwb_emulstate = !!t;
1573
1574 return count;
1575 }
1576
1577 static DRIVER_ATTR(uwb_emulstate, S_IWUSR | S_IRUGO,
1578 tpacpi_driver_uwb_emulstate_show,
1579 tpacpi_driver_uwb_emulstate_store);
1580 #endif
1581
1582 /* --------------------------------------------------------------------- */
1583
1584 static struct driver_attribute *tpacpi_driver_attributes[] = {
1585 &driver_attr_debug_level, &driver_attr_version,
1586 &driver_attr_interface_version,
1587 };
1588
1589 static int __init tpacpi_create_driver_attributes(struct device_driver *drv)
1590 {
1591 int i, res;
1592
1593 i = 0;
1594 res = 0;
1595 while (!res && i < ARRAY_SIZE(tpacpi_driver_attributes)) {
1596 res = driver_create_file(drv, tpacpi_driver_attributes[i]);
1597 i++;
1598 }
1599
1600 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
1601 if (!res && dbg_wlswemul)
1602 res = driver_create_file(drv, &driver_attr_wlsw_emulstate);
1603 if (!res && dbg_bluetoothemul)
1604 res = driver_create_file(drv, &driver_attr_bluetooth_emulstate);
1605 if (!res && dbg_wwanemul)
1606 res = driver_create_file(drv, &driver_attr_wwan_emulstate);
1607 if (!res && dbg_uwbemul)
1608 res = driver_create_file(drv, &driver_attr_uwb_emulstate);
1609 #endif
1610
1611 return res;
1612 }
1613
1614 static void tpacpi_remove_driver_attributes(struct device_driver *drv)
1615 {
1616 int i;
1617
1618 for (i = 0; i < ARRAY_SIZE(tpacpi_driver_attributes); i++)
1619 driver_remove_file(drv, tpacpi_driver_attributes[i]);
1620
1621 #ifdef THINKPAD_ACPI_DEBUGFACILITIES
1622 driver_remove_file(drv, &driver_attr_wlsw_emulstate);
1623 driver_remove_file(drv, &driver_attr_bluetooth_emulstate);
1624 driver_remove_file(drv, &driver_attr_wwan_emulstate);
1625 driver_remove_file(drv, &driver_attr_uwb_emulstate);
1626 #endif
1627 }
1628
1629 /*************************************************************************
1630 * Firmware Data
1631 */
1632
1633 /*
1634 * Table of recommended minimum BIOS versions
1635 *
1636 * Reasons for listing:
1637 * 1. Stable BIOS, listed because the unknown amount of
1638 * bugs and bad ACPI behaviour on older versions
1639 *
1640 * 2. BIOS or EC fw with known bugs that trigger on Linux
1641 *
1642 * 3. BIOS with known reduced functionality in older versions
1643 *
1644 * We recommend the latest BIOS and EC version.
1645 * We only support the latest BIOS and EC fw version as a rule.
1646 *
1647 * Sources: IBM ThinkPad Public Web Documents (update changelogs),
1648 * Information from users in ThinkWiki
1649 *
1650 * WARNING: we use this table also to detect that the machine is
1651 * a ThinkPad in some cases, so don't remove entries lightly.
1652 */
1653
1654 #define TPV_Q(__v, __id1, __id2, __bv1, __bv2) \
1655 { .vendor = (__v), \
1656 .bios = TPID(__id1, __id2), \
1657 .ec = TPACPI_MATCH_ANY, \
1658 .quirks = TPACPI_MATCH_ANY << 16 \
1659 | (__bv1) << 8 | (__bv2) }
1660
1661 #define TPV_Q_X(__v, __bid1, __bid2, __bv1, __bv2, \
1662 __eid, __ev1, __ev2) \
1663 { .vendor = (__v), \
1664 .bios = TPID(__bid1, __bid2), \
1665 .ec = __eid, \
1666 .quirks = (__ev1) << 24 | (__ev2) << 16 \
1667 | (__bv1) << 8 | (__bv2) }
1668
1669 #define TPV_QI0(__id1, __id2, __bv1, __bv2) \
1670 TPV_Q(PCI_VENDOR_ID_IBM, __id1, __id2, __bv1, __bv2)
1671
1672 /* Outdated IBM BIOSes often lack the EC id string */
1673 #define TPV_QI1(__id1, __id2, __bv1, __bv2, __ev1, __ev2) \
1674 TPV_Q_X(PCI_VENDOR_ID_IBM, __id1, __id2, \
1675 __bv1, __bv2, TPID(__id1, __id2), \
1676 __ev1, __ev2), \
1677 TPV_Q_X(PCI_VENDOR_ID_IBM, __id1, __id2, \
1678 __bv1, __bv2, TPACPI_MATCH_UNKNOWN, \
1679 __ev1, __ev2)
1680
1681 /* Outdated IBM BIOSes often lack the EC id string */
1682 #define TPV_QI2(__bid1, __bid2, __bv1, __bv2, \
1683 __eid1, __eid2, __ev1, __ev2) \
1684 TPV_Q_X(PCI_VENDOR_ID_IBM, __bid1, __bid2, \
1685 __bv1, __bv2, TPID(__eid1, __eid2), \
1686 __ev1, __ev2), \
1687 TPV_Q_X(PCI_VENDOR_ID_IBM, __bid1, __bid2, \
1688 __bv1, __bv2, TPACPI_MATCH_UNKNOWN, \
1689 __ev1, __ev2)
1690
1691 #define TPV_QL0(__id1, __id2, __bv1, __bv2) \
1692 TPV_Q(PCI_VENDOR_ID_LENOVO, __id1, __id2, __bv1, __bv2)
1693
1694 #define TPV_QL1(__id1, __id2, __bv1, __bv2, __ev1, __ev2) \
1695 TPV_Q_X(PCI_VENDOR_ID_LENOVO, __id1, __id2, \
1696 __bv1, __bv2, TPID(__id1, __id2), \
1697 __ev1, __ev2)
1698
1699 #define TPV_QL2(__bid1, __bid2, __bv1, __bv2, \
1700 __eid1, __eid2, __ev1, __ev2) \
1701 TPV_Q_X(PCI_VENDOR_ID_LENOVO, __bid1, __bid2, \
1702 __bv1, __bv2, TPID(__eid1, __eid2), \
1703 __ev1, __ev2)
1704
1705 static const struct tpacpi_quirk tpacpi_bios_version_qtable[] __initconst = {
1706 /* Numeric models ------------------ */
1707 /* FW MODEL BIOS VERS */
1708 TPV_QI0('I', 'M', '6', '5'), /* 570 */
1709 TPV_QI0('I', 'U', '2', '6'), /* 570E */
1710 TPV_QI0('I', 'B', '5', '4'), /* 600 */
1711 TPV_QI0('I', 'H', '4', '7'), /* 600E */
1712 TPV_QI0('I', 'N', '3', '6'), /* 600E */
1713 TPV_QI0('I', 'T', '5', '5'), /* 600X */
1714 TPV_QI0('I', 'D', '4', '8'), /* 770, 770E, 770ED */
1715 TPV_QI0('I', 'I', '4', '2'), /* 770X */
1716 TPV_QI0('I', 'O', '2', '3'), /* 770Z */
1717
1718 /* A-series ------------------------- */
1719 /* FW MODEL BIOS VERS EC VERS */
1720 TPV_QI0('I', 'W', '5', '9'), /* A20m */
1721 TPV_QI0('I', 'V', '6', '9'), /* A20p */
1722 TPV_QI0('1', '0', '2', '6'), /* A21e, A22e */
1723 TPV_QI0('K', 'U', '3', '6'), /* A21e */
1724 TPV_QI0('K', 'X', '3', '6'), /* A21m, A22m */
1725 TPV_QI0('K', 'Y', '3', '8'), /* A21p, A22p */
1726 TPV_QI0('1', 'B', '1', '7'), /* A22e */
1727 TPV_QI0('1', '3', '2', '0'), /* A22m */
1728 TPV_QI0('1', 'E', '7', '3'), /* A30/p (0) */
1729 TPV_QI1('1', 'G', '4', '1', '1', '7'), /* A31/p (0) */
1730 TPV_QI1('1', 'N', '1', '6', '0', '7'), /* A31/p (0) */
1731
1732 /* G-series ------------------------- */
1733 /* FW MODEL BIOS VERS */
1734 TPV_QI0('1', 'T', 'A', '6'), /* G40 */
1735 TPV_QI0('1', 'X', '5', '7'), /* G41 */
1736
1737 /* R-series, T-series --------------- */
1738 /* FW MODEL BIOS VERS EC VERS */
1739 TPV_QI0('1', 'C', 'F', '0'), /* R30 */
1740 TPV_QI0('1', 'F', 'F', '1'), /* R31 */
1741 TPV_QI0('1', 'M', '9', '7'), /* R32 */
1742 TPV_QI0('1', 'O', '6', '1'), /* R40 */
1743 TPV_QI0('1', 'P', '6', '5'), /* R40 */
1744 TPV_QI0('1', 'S', '7', '0'), /* R40e */
1745 TPV_QI1('1', 'R', 'D', 'R', '7', '1'), /* R50/p, R51,
1746 T40/p, T41/p, T42/p (1) */
1747 TPV_QI1('1', 'V', '7', '1', '2', '8'), /* R50e, R51 (1) */
1748 TPV_QI1('7', '8', '7', '1', '0', '6'), /* R51e (1) */
1749 TPV_QI1('7', '6', '6', '9', '1', '6'), /* R52 (1) */
1750 TPV_QI1('7', '0', '6', '9', '2', '8'), /* R52, T43 (1) */
1751
1752 TPV_QI0('I', 'Y', '6', '1'), /* T20 */
1753 TPV_QI0('K', 'Z', '3', '4'), /* T21 */
1754 TPV_QI0('1', '6', '3', '2'), /* T22 */
1755 TPV_QI1('1', 'A', '6', '4', '2', '3'), /* T23 (0) */
1756 TPV_QI1('1', 'I', '7', '1', '2', '0'), /* T30 (0) */
1757 TPV_QI1('1', 'Y', '6', '5', '2', '9'), /* T43/p (1) */
1758
1759 TPV_QL1('7', '9', 'E', '3', '5', '0'), /* T60/p */
1760 TPV_QL1('7', 'C', 'D', '2', '2', '2'), /* R60, R60i */
1761 TPV_QL1('7', 'E', 'D', '0', '1', '5'), /* R60e, R60i */
1762
1763 /* BIOS FW BIOS VERS EC FW EC VERS */
1764 TPV_QI2('1', 'W', '9', '0', '1', 'V', '2', '8'), /* R50e (1) */
1765 TPV_QL2('7', 'I', '3', '4', '7', '9', '5', '0'), /* T60/p wide */
1766
1767 /* X-series ------------------------- */
1768 /* FW MODEL BIOS VERS EC VERS */
1769 TPV_QI0('I', 'Z', '9', 'D'), /* X20, X21 */
1770 TPV_QI0('1', 'D', '7', '0'), /* X22, X23, X24 */
1771 TPV_QI1('1', 'K', '4', '8', '1', '8'), /* X30 (0) */
1772 TPV_QI1('1', 'Q', '9', '7', '2', '3'), /* X31, X32 (0) */
1773 TPV_QI1('1', 'U', 'D', '3', 'B', '2'), /* X40 (0) */
1774 TPV_QI1('7', '4', '6', '4', '2', '7'), /* X41 (0) */
1775 TPV_QI1('7', '5', '6', '0', '2', '0'), /* X41t (0) */
1776
1777 TPV_QL1('7', 'B', 'D', '7', '4', '0'), /* X60/s */
1778 TPV_QL1('7', 'J', '3', '0', '1', '3'), /* X60t */
1779
1780 /* (0) - older versions lack DMI EC fw string and functionality */
1781 /* (1) - older versions known to lack functionality */
1782 };
1783
1784 #undef TPV_QL1
1785 #undef TPV_QL0
1786 #undef TPV_QI2
1787 #undef TPV_QI1
1788 #undef TPV_QI0
1789 #undef TPV_Q_X
1790 #undef TPV_Q
1791
1792 static void __init tpacpi_check_outdated_fw(void)
1793 {
1794 unsigned long fwvers;
1795 u16 ec_version, bios_version;
1796
1797 fwvers = tpacpi_check_quirks(tpacpi_bios_version_qtable,
1798 ARRAY_SIZE(tpacpi_bios_version_qtable));
1799
1800 if (!fwvers)
1801 return;
1802
1803 bios_version = fwvers & 0xffffU;
1804 ec_version = (fwvers >> 16) & 0xffffU;
1805
1806 /* note that unknown versions are set to 0x0000 and we use that */
1807 if ((bios_version > thinkpad_id.bios_release) ||
1808 (ec_version > thinkpad_id.ec_release &&
1809 ec_version != TPACPI_MATCH_ANY)) {
1810 /*
1811 * The changelogs would let us track down the exact
1812 * reason, but it is just too much of a pain to track
1813 * it. We only list BIOSes that are either really
1814 * broken, or really stable to begin with, so it is
1815 * best if the user upgrades the firmware anyway.
1816 */
1817 pr_warn("WARNING: Outdated ThinkPad BIOS/EC firmware\n");
1818 pr_warn("WARNING: This firmware may be missing critical bug "
1819 "fixes and/or important features\n");
1820 }
1821 }
1822
1823 static bool __init tpacpi_is_fw_known(void)
1824 {
1825 return tpacpi_check_quirks(tpacpi_bios_version_qtable,
1826 ARRAY_SIZE(tpacpi_bios_version_qtable)) != 0;
1827 }
1828
1829 /****************************************************************************
1830 ****************************************************************************
1831 *
1832 * Subdrivers
1833 *
1834 ****************************************************************************
1835 ****************************************************************************/
1836
1837 /*************************************************************************
1838 * thinkpad-acpi metadata subdriver
1839 */
1840
1841 static int thinkpad_acpi_driver_read(struct seq_file *m)
1842 {
1843 seq_printf(m, "driver:\t\t%s\n", TPACPI_DESC);
1844 seq_printf(m, "version:\t%s\n", TPACPI_VERSION);
1845 return 0;
1846 }
1847
1848 static struct ibm_struct thinkpad_acpi_driver_data = {
1849 .name = "driver",
1850 .read = thinkpad_acpi_driver_read,
1851 };
1852
1853 /*************************************************************************
1854 * Hotkey subdriver
1855 */
1856
1857 /*
1858 * ThinkPad firmware event model
1859 *
1860 * The ThinkPad firmware has two main event interfaces: normal ACPI
1861 * notifications (which follow the ACPI standard), and a private event
1862 * interface.
1863 *
1864 * The private event interface also issues events for the hotkeys. As
1865 * the driver gained features, the event handling code ended up being
1866 * built around the hotkey subdriver. This will need to be refactored
1867 * to a more formal event API eventually.
1868 *
1869 * Some "hotkeys" are actually supposed to be used as event reports,
1870 * such as "brightness has changed", "volume has changed", depending on
1871 * the ThinkPad model and how the firmware is operating.
1872 *
1873 * Unlike other classes, hotkey-class events have mask/unmask control on
1874 * non-ancient firmware. However, how it behaves changes a lot with the
1875 * firmware model and version.
1876 */
1877
1878 enum { /* hot key scan codes (derived from ACPI DSDT) */
1879 TP_ACPI_HOTKEYSCAN_FNF1 = 0,
1880 TP_ACPI_HOTKEYSCAN_FNF2,
1881 TP_ACPI_HOTKEYSCAN_FNF3,
1882 TP_ACPI_HOTKEYSCAN_FNF4,
1883 TP_ACPI_HOTKEYSCAN_FNF5,
1884 TP_ACPI_HOTKEYSCAN_FNF6,
1885 TP_ACPI_HOTKEYSCAN_FNF7,
1886 TP_ACPI_HOTKEYSCAN_FNF8,
1887 TP_ACPI_HOTKEYSCAN_FNF9,
1888 TP_ACPI_HOTKEYSCAN_FNF10,
1889 TP_ACPI_HOTKEYSCAN_FNF11,
1890 TP_ACPI_HOTKEYSCAN_FNF12,
1891 TP_ACPI_HOTKEYSCAN_FNBACKSPACE,
1892 TP_ACPI_HOTKEYSCAN_FNINSERT,
1893 TP_ACPI_HOTKEYSCAN_FNDELETE,
1894 TP_ACPI_HOTKEYSCAN_FNHOME,
1895 TP_ACPI_HOTKEYSCAN_FNEND,
1896 TP_ACPI_HOTKEYSCAN_FNPAGEUP,
1897 TP_ACPI_HOTKEYSCAN_FNPAGEDOWN,
1898 TP_ACPI_HOTKEYSCAN_FNSPACE,
1899 TP_ACPI_HOTKEYSCAN_VOLUMEUP,
1900 TP_ACPI_HOTKEYSCAN_VOLUMEDOWN,
1901 TP_ACPI_HOTKEYSCAN_MUTE,
1902 TP_ACPI_HOTKEYSCAN_THINKPAD,
1903 TP_ACPI_HOTKEYSCAN_UNK1,
1904 TP_ACPI_HOTKEYSCAN_UNK2,
1905 TP_ACPI_HOTKEYSCAN_UNK3,
1906 TP_ACPI_HOTKEYSCAN_UNK4,
1907 TP_ACPI_HOTKEYSCAN_UNK5,
1908 TP_ACPI_HOTKEYSCAN_UNK6,
1909 TP_ACPI_HOTKEYSCAN_UNK7,
1910 TP_ACPI_HOTKEYSCAN_UNK8,
1911
1912 /* Hotkey keymap size */
1913 TPACPI_HOTKEY_MAP_LEN
1914 };
1915
1916 enum { /* Keys/events available through NVRAM polling */
1917 TPACPI_HKEY_NVRAM_KNOWN_MASK = 0x00fb88c0U,
1918 TPACPI_HKEY_NVRAM_GOOD_MASK = 0x00fb8000U,
1919 };
1920
1921 enum { /* Positions of some of the keys in hotkey masks */
1922 TP_ACPI_HKEY_DISPSWTCH_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF7,
1923 TP_ACPI_HKEY_DISPXPAND_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF8,
1924 TP_ACPI_HKEY_HIBERNATE_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF12,
1925 TP_ACPI_HKEY_BRGHTUP_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNHOME,
1926 TP_ACPI_HKEY_BRGHTDWN_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNEND,
1927 TP_ACPI_HKEY_THNKLGHT_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNPAGEUP,
1928 TP_ACPI_HKEY_ZOOM_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNSPACE,
1929 TP_ACPI_HKEY_VOLUP_MASK = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEUP,
1930 TP_ACPI_HKEY_VOLDWN_MASK = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEDOWN,
1931 TP_ACPI_HKEY_MUTE_MASK = 1 << TP_ACPI_HOTKEYSCAN_MUTE,
1932 TP_ACPI_HKEY_THINKPAD_MASK = 1 << TP_ACPI_HOTKEYSCAN_THINKPAD,
1933 };
1934
1935 enum { /* NVRAM to ACPI HKEY group map */
1936 TP_NVRAM_HKEY_GROUP_HK2 = TP_ACPI_HKEY_THINKPAD_MASK |
1937 TP_ACPI_HKEY_ZOOM_MASK |
1938 TP_ACPI_HKEY_DISPSWTCH_MASK |
1939 TP_ACPI_HKEY_HIBERNATE_MASK,
1940 TP_NVRAM_HKEY_GROUP_BRIGHTNESS = TP_ACPI_HKEY_BRGHTUP_MASK |
1941 TP_ACPI_HKEY_BRGHTDWN_MASK,
1942 TP_NVRAM_HKEY_GROUP_VOLUME = TP_ACPI_HKEY_VOLUP_MASK |
1943 TP_ACPI_HKEY_VOLDWN_MASK |
1944 TP_ACPI_HKEY_MUTE_MASK,
1945 };
1946
1947 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1948 struct tp_nvram_state {
1949 u16 thinkpad_toggle:1;
1950 u16 zoom_toggle:1;
1951 u16 display_toggle:1;
1952 u16 thinklight_toggle:1;
1953 u16 hibernate_toggle:1;
1954 u16 displayexp_toggle:1;
1955 u16 display_state:1;
1956 u16 brightness_toggle:1;
1957 u16 volume_toggle:1;
1958 u16 mute:1;
1959
1960 u8 brightness_level;
1961 u8 volume_level;
1962 };
1963
1964 /* kthread for the hotkey poller */
1965 static struct task_struct *tpacpi_hotkey_task;
1966
1967 /*
1968 * Acquire mutex to write poller control variables as an
1969 * atomic block.
1970 *
1971 * Increment hotkey_config_change when changing them if you
1972 * want the kthread to forget old state.
1973 *
1974 * See HOTKEY_CONFIG_CRITICAL_START/HOTKEY_CONFIG_CRITICAL_END
1975 */
1976 static struct mutex hotkey_thread_data_mutex;
1977 static unsigned int hotkey_config_change;
1978
1979 /*
1980 * hotkey poller control variables
1981 *
1982 * Must be atomic or readers will also need to acquire mutex
1983 *
1984 * HOTKEY_CONFIG_CRITICAL_START/HOTKEY_CONFIG_CRITICAL_END
1985 * should be used only when the changes need to be taken as
1986 * a block, OR when one needs to force the kthread to forget
1987 * old state.
1988 */
1989 static u32 hotkey_source_mask; /* bit mask 0=ACPI,1=NVRAM */
1990 static unsigned int hotkey_poll_freq = 10; /* Hz */
1991
1992 #define HOTKEY_CONFIG_CRITICAL_START \
1993 do { \
1994 mutex_lock(&hotkey_thread_data_mutex); \
1995 hotkey_config_change++; \
1996 } while (0);
1997 #define HOTKEY_CONFIG_CRITICAL_END \
1998 mutex_unlock(&hotkey_thread_data_mutex);
1999
2000 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2001
2002 #define hotkey_source_mask 0U
2003 #define HOTKEY_CONFIG_CRITICAL_START
2004 #define HOTKEY_CONFIG_CRITICAL_END
2005
2006 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2007
2008 static struct mutex hotkey_mutex;
2009
2010 static enum { /* Reasons for waking up */
2011 TP_ACPI_WAKEUP_NONE = 0, /* None or unknown */
2012 TP_ACPI_WAKEUP_BAYEJ, /* Bay ejection request */
2013 TP_ACPI_WAKEUP_UNDOCK, /* Undock request */
2014 } hotkey_wakeup_reason;
2015
2016 static int hotkey_autosleep_ack;
2017
2018 static u32 hotkey_orig_mask; /* events the BIOS had enabled */
2019 static u32 hotkey_all_mask; /* all events supported in fw */
2020 static u32 hotkey_reserved_mask; /* events better left disabled */
2021 static u32 hotkey_driver_mask; /* events needed by the driver */
2022 static u32 hotkey_user_mask; /* events visible to userspace */
2023 static u32 hotkey_acpi_mask; /* events enabled in firmware */
2024
2025 static u16 *hotkey_keycode_map;
2026
2027 static struct attribute_set *hotkey_dev_attributes;
2028
2029 static void tpacpi_driver_event(const unsigned int hkey_event);
2030 static void hotkey_driver_event(const unsigned int scancode);
2031 static void hotkey_poll_setup(const bool may_warn);
2032
2033 /* HKEY.MHKG() return bits */
2034 #define TP_HOTKEY_TABLET_MASK (1 << 3)
2035
2036 static int hotkey_get_wlsw(void)
2037 {
2038 int status;
2039
2040 if (!tp_features.hotkey_wlsw)
2041 return -ENODEV;
2042
2043 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
2044 if (dbg_wlswemul)
2045 return (tpacpi_wlsw_emulstate) ?
2046 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
2047 #endif
2048
2049 if (!acpi_evalf(hkey_handle, &status, "WLSW", "d"))
2050 return -EIO;
2051
2052 return (status) ? TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
2053 }
2054
2055 static int hotkey_get_tablet_mode(int *status)
2056 {
2057 int s;
2058
2059 if (!acpi_evalf(hkey_handle, &s, "MHKG", "d"))
2060 return -EIO;
2061
2062 *status = ((s & TP_HOTKEY_TABLET_MASK) != 0);
2063 return 0;
2064 }
2065
2066 /*
2067 * Reads current event mask from firmware, and updates
2068 * hotkey_acpi_mask accordingly. Also resets any bits
2069 * from hotkey_user_mask that are unavailable to be
2070 * delivered (shadow requirement of the userspace ABI).
2071 *
2072 * Call with hotkey_mutex held
2073 */
2074 static int hotkey_mask_get(void)
2075 {
2076 if (tp_features.hotkey_mask) {
2077 u32 m = 0;
2078
2079 if (!acpi_evalf(hkey_handle, &m, "DHKN", "d"))
2080 return -EIO;
2081
2082 hotkey_acpi_mask = m;
2083 } else {
2084 /* no mask support doesn't mean no event support... */
2085 hotkey_acpi_mask = hotkey_all_mask;
2086 }
2087
2088 /* sync userspace-visible mask */
2089 hotkey_user_mask &= (hotkey_acpi_mask | hotkey_source_mask);
2090
2091 return 0;
2092 }
2093
2094 void static hotkey_mask_warn_incomplete_mask(void)
2095 {
2096 /* log only what the user can fix... */
2097 const u32 wantedmask = hotkey_driver_mask &
2098 ~(hotkey_acpi_mask | hotkey_source_mask) &
2099 (hotkey_all_mask | TPACPI_HKEY_NVRAM_KNOWN_MASK);
2100
2101 if (wantedmask)
2102 pr_notice("required events 0x%08x not enabled!\n", wantedmask);
2103 }
2104
2105 /*
2106 * Set the firmware mask when supported
2107 *
2108 * Also calls hotkey_mask_get to update hotkey_acpi_mask.
2109 *
2110 * NOTE: does not set bits in hotkey_user_mask, but may reset them.
2111 *
2112 * Call with hotkey_mutex held
2113 */
2114 static int hotkey_mask_set(u32 mask)
2115 {
2116 int i;
2117 int rc = 0;
2118
2119 const u32 fwmask = mask & ~hotkey_source_mask;
2120
2121 if (tp_features.hotkey_mask) {
2122 for (i = 0; i < 32; i++) {
2123 if (!acpi_evalf(hkey_handle,
2124 NULL, "MHKM", "vdd", i + 1,
2125 !!(mask & (1 << i)))) {
2126 rc = -EIO;
2127 break;
2128 }
2129 }
2130 }
2131
2132 /*
2133 * We *must* make an inconditional call to hotkey_mask_get to
2134 * refresh hotkey_acpi_mask and update hotkey_user_mask
2135 *
2136 * Take the opportunity to also log when we cannot _enable_
2137 * a given event.
2138 */
2139 if (!hotkey_mask_get() && !rc && (fwmask & ~hotkey_acpi_mask)) {
2140 pr_notice("asked for hotkey mask 0x%08x, but "
2141 "firmware forced it to 0x%08x\n",
2142 fwmask, hotkey_acpi_mask);
2143 }
2144
2145 if (tpacpi_lifecycle != TPACPI_LIFE_EXITING)
2146 hotkey_mask_warn_incomplete_mask();
2147
2148 return rc;
2149 }
2150
2151 /*
2152 * Sets hotkey_user_mask and tries to set the firmware mask
2153 *
2154 * Call with hotkey_mutex held
2155 */
2156 static int hotkey_user_mask_set(const u32 mask)
2157 {
2158 int rc;
2159
2160 /* Give people a chance to notice they are doing something that
2161 * is bound to go boom on their users sooner or later */
2162 if (!tp_warned.hotkey_mask_ff &&
2163 (mask == 0xffff || mask == 0xffffff ||
2164 mask == 0xffffffff)) {
2165 tp_warned.hotkey_mask_ff = 1;
2166 pr_notice("setting the hotkey mask to 0x%08x is likely "
2167 "not the best way to go about it\n", mask);
2168 pr_notice("please consider using the driver defaults, "
2169 "and refer to up-to-date thinkpad-acpi "
2170 "documentation\n");
2171 }
2172
2173 /* Try to enable what the user asked for, plus whatever we need.
2174 * this syncs everything but won't enable bits in hotkey_user_mask */
2175 rc = hotkey_mask_set((mask | hotkey_driver_mask) & ~hotkey_source_mask);
2176
2177 /* Enable the available bits in hotkey_user_mask */
2178 hotkey_user_mask = mask & (hotkey_acpi_mask | hotkey_source_mask);
2179
2180 return rc;
2181 }
2182
2183 /*
2184 * Sets the driver hotkey mask.
2185 *
2186 * Can be called even if the hotkey subdriver is inactive
2187 */
2188 static int tpacpi_hotkey_driver_mask_set(const u32 mask)
2189 {
2190 int rc;
2191
2192 /* Do the right thing if hotkey_init has not been called yet */
2193 if (!tp_features.hotkey) {
2194 hotkey_driver_mask = mask;
2195 return 0;
2196 }
2197
2198 mutex_lock(&hotkey_mutex);
2199
2200 HOTKEY_CONFIG_CRITICAL_START
2201 hotkey_driver_mask = mask;
2202 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2203 hotkey_source_mask |= (mask & ~hotkey_all_mask);
2204 #endif
2205 HOTKEY_CONFIG_CRITICAL_END
2206
2207 rc = hotkey_mask_set((hotkey_acpi_mask | hotkey_driver_mask) &
2208 ~hotkey_source_mask);
2209 hotkey_poll_setup(true);
2210
2211 mutex_unlock(&hotkey_mutex);
2212
2213 return rc;
2214 }
2215
2216 static int hotkey_status_get(int *status)
2217 {
2218 if (!acpi_evalf(hkey_handle, status, "DHKC", "d"))
2219 return -EIO;
2220
2221 return 0;
2222 }
2223
2224 static int hotkey_status_set(bool enable)
2225 {
2226 if (!acpi_evalf(hkey_handle, NULL, "MHKC", "vd", enable ? 1 : 0))
2227 return -EIO;
2228
2229 return 0;
2230 }
2231
2232 static void tpacpi_input_send_tabletsw(void)
2233 {
2234 int state;
2235
2236 if (tp_features.hotkey_tablet &&
2237 !hotkey_get_tablet_mode(&state)) {
2238 mutex_lock(&tpacpi_inputdev_send_mutex);
2239
2240 input_report_switch(tpacpi_inputdev,
2241 SW_TABLET_MODE, !!state);
2242 input_sync(tpacpi_inputdev);
2243
2244 mutex_unlock(&tpacpi_inputdev_send_mutex);
2245 }
2246 }
2247
2248 /* Do NOT call without validating scancode first */
2249 static void tpacpi_input_send_key(const unsigned int scancode)
2250 {
2251 const unsigned int keycode = hotkey_keycode_map[scancode];
2252
2253 if (keycode != KEY_RESERVED) {
2254 mutex_lock(&tpacpi_inputdev_send_mutex);
2255
2256 input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN, scancode);
2257 input_report_key(tpacpi_inputdev, keycode, 1);
2258 input_sync(tpacpi_inputdev);
2259
2260 input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN, scancode);
2261 input_report_key(tpacpi_inputdev, keycode, 0);
2262 input_sync(tpacpi_inputdev);
2263
2264 mutex_unlock(&tpacpi_inputdev_send_mutex);
2265 }
2266 }
2267
2268 /* Do NOT call without validating scancode first */
2269 static void tpacpi_input_send_key_masked(const unsigned int scancode)
2270 {
2271 hotkey_driver_event(scancode);
2272 if (hotkey_user_mask & (1 << scancode))
2273 tpacpi_input_send_key(scancode);
2274 }
2275
2276 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2277 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver;
2278
2279 /* Do NOT call without validating scancode first */
2280 static void tpacpi_hotkey_send_key(unsigned int scancode)
2281 {
2282 tpacpi_input_send_key_masked(scancode);
2283 }
2284
2285 static void hotkey_read_nvram(struct tp_nvram_state *n, const u32 m)
2286 {
2287 u8 d;
2288
2289 if (m & TP_NVRAM_HKEY_GROUP_HK2) {
2290 d = nvram_read_byte(TP_NVRAM_ADDR_HK2);
2291 n->thinkpad_toggle = !!(d & TP_NVRAM_MASK_HKT_THINKPAD);
2292 n->zoom_toggle = !!(d & TP_NVRAM_MASK_HKT_ZOOM);
2293 n->display_toggle = !!(d & TP_NVRAM_MASK_HKT_DISPLAY);
2294 n->hibernate_toggle = !!(d & TP_NVRAM_MASK_HKT_HIBERNATE);
2295 }
2296 if (m & TP_ACPI_HKEY_THNKLGHT_MASK) {
2297 d = nvram_read_byte(TP_NVRAM_ADDR_THINKLIGHT);
2298 n->thinklight_toggle = !!(d & TP_NVRAM_MASK_THINKLIGHT);
2299 }
2300 if (m & TP_ACPI_HKEY_DISPXPAND_MASK) {
2301 d = nvram_read_byte(TP_NVRAM_ADDR_VIDEO);
2302 n->displayexp_toggle =
2303 !!(d & TP_NVRAM_MASK_HKT_DISPEXPND);
2304 }
2305 if (m & TP_NVRAM_HKEY_GROUP_BRIGHTNESS) {
2306 d = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS);
2307 n->brightness_level = (d & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
2308 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
2309 n->brightness_toggle =
2310 !!(d & TP_NVRAM_MASK_HKT_BRIGHTNESS);
2311 }
2312 if (m & TP_NVRAM_HKEY_GROUP_VOLUME) {
2313 d = nvram_read_byte(TP_NVRAM_ADDR_MIXER);
2314 n->volume_level = (d & TP_NVRAM_MASK_LEVEL_VOLUME)
2315 >> TP_NVRAM_POS_LEVEL_VOLUME;
2316 n->mute = !!(d & TP_NVRAM_MASK_MUTE);
2317 n->volume_toggle = !!(d & TP_NVRAM_MASK_HKT_VOLUME);
2318 }
2319 }
2320
2321 static void hotkey_compare_and_issue_event(struct tp_nvram_state *oldn,
2322 struct tp_nvram_state *newn,
2323 const u32 event_mask)
2324 {
2325
2326 #define TPACPI_COMPARE_KEY(__scancode, __member) \
2327 do { \
2328 if ((event_mask & (1 << __scancode)) && \
2329 oldn->__member != newn->__member) \
2330 tpacpi_hotkey_send_key(__scancode); \
2331 } while (0)
2332
2333 #define TPACPI_MAY_SEND_KEY(__scancode) \
2334 do { \
2335 if (event_mask & (1 << __scancode)) \
2336 tpacpi_hotkey_send_key(__scancode); \
2337 } while (0)
2338
2339 void issue_volchange(const unsigned int oldvol,
2340 const unsigned int newvol)
2341 {
2342 unsigned int i = oldvol;
2343
2344 while (i > newvol) {
2345 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
2346 i--;
2347 }
2348 while (i < newvol) {
2349 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
2350 i++;
2351 }
2352 }
2353
2354 void issue_brightnesschange(const unsigned int oldbrt,
2355 const unsigned int newbrt)
2356 {
2357 unsigned int i = oldbrt;
2358
2359 while (i > newbrt) {
2360 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
2361 i--;
2362 }
2363 while (i < newbrt) {
2364 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
2365 i++;
2366 }
2367 }
2368
2369 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_THINKPAD, thinkpad_toggle);
2370 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNSPACE, zoom_toggle);
2371 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF7, display_toggle);
2372 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF12, hibernate_toggle);
2373
2374 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNPAGEUP, thinklight_toggle);
2375
2376 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF8, displayexp_toggle);
2377
2378 /*
2379 * Handle volume
2380 *
2381 * This code is supposed to duplicate the IBM firmware behaviour:
2382 * - Pressing MUTE issues mute hotkey message, even when already mute
2383 * - Pressing Volume up/down issues volume up/down hotkey messages,
2384 * even when already at maximum or minimum volume
2385 * - The act of unmuting issues volume up/down notification,
2386 * depending which key was used to unmute
2387 *
2388 * We are constrained to what the NVRAM can tell us, which is not much
2389 * and certainly not enough if more than one volume hotkey was pressed
2390 * since the last poll cycle.
2391 *
2392 * Just to make our life interesting, some newer Lenovo ThinkPads have
2393 * bugs in the BIOS and may fail to update volume_toggle properly.
2394 */
2395 if (newn->mute) {
2396 /* muted */
2397 if (!oldn->mute ||
2398 oldn->volume_toggle != newn->volume_toggle ||
2399 oldn->volume_level != newn->volume_level) {
2400 /* recently muted, or repeated mute keypress, or
2401 * multiple presses ending in mute */
2402 issue_volchange(oldn->volume_level, newn->volume_level);
2403 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE);
2404 }
2405 } else {
2406 /* unmute */
2407 if (oldn->mute) {
2408 /* recently unmuted, issue 'unmute' keypress */
2409 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
2410 }
2411 if (oldn->volume_level != newn->volume_level) {
2412 issue_volchange(oldn->volume_level, newn->volume_level);
2413 } else if (oldn->volume_toggle != newn->volume_toggle) {
2414 /* repeated vol up/down keypress at end of scale ? */
2415 if (newn->volume_level == 0)
2416 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
2417 else if (newn->volume_level >= TP_NVRAM_LEVEL_VOLUME_MAX)
2418 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
2419 }
2420 }
2421
2422 /* handle brightness */
2423 if (oldn->brightness_level != newn->brightness_level) {
2424 issue_brightnesschange(oldn->brightness_level,
2425 newn->brightness_level);
2426 } else if (oldn->brightness_toggle != newn->brightness_toggle) {
2427 /* repeated key presses that didn't change state */
2428 if (newn->brightness_level == 0)
2429 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
2430 else if (newn->brightness_level >= bright_maxlvl
2431 && !tp_features.bright_unkfw)
2432 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
2433 }
2434
2435 #undef TPACPI_COMPARE_KEY
2436 #undef TPACPI_MAY_SEND_KEY
2437 }
2438
2439 /*
2440 * Polling driver
2441 *
2442 * We track all events in hotkey_source_mask all the time, since
2443 * most of them are edge-based. We only issue those requested by
2444 * hotkey_user_mask or hotkey_driver_mask, though.
2445 */
2446 static int hotkey_kthread(void *data)
2447 {
2448 struct tp_nvram_state s[2];
2449 u32 poll_mask, event_mask;
2450 unsigned int si, so;
2451 unsigned long t;
2452 unsigned int change_detector;
2453 unsigned int poll_freq;
2454 bool was_frozen;
2455
2456 if (tpacpi_lifecycle == TPACPI_LIFE_EXITING)
2457 goto exit;
2458
2459 set_freezable();
2460
2461 so = 0;
2462 si = 1;
2463 t = 0;
2464
2465 /* Initial state for compares */
2466 mutex_lock(&hotkey_thread_data_mutex);
2467 change_detector = hotkey_config_change;
2468 poll_mask = hotkey_source_mask;
2469 event_mask = hotkey_source_mask &
2470 (hotkey_driver_mask | hotkey_user_mask);
2471 poll_freq = hotkey_poll_freq;
2472 mutex_unlock(&hotkey_thread_data_mutex);
2473 hotkey_read_nvram(&s[so], poll_mask);
2474
2475 while (!kthread_should_stop()) {
2476 if (t == 0) {
2477 if (likely(poll_freq))
2478 t = 1000/poll_freq;
2479 else
2480 t = 100; /* should never happen... */
2481 }
2482 t = msleep_interruptible(t);
2483 if (unlikely(kthread_freezable_should_stop(&was_frozen)))
2484 break;
2485
2486 if (t > 0 && !was_frozen)
2487 continue;
2488
2489 mutex_lock(&hotkey_thread_data_mutex);
2490 if (was_frozen || hotkey_config_change != change_detector) {
2491 /* forget old state on thaw or config change */
2492 si = so;
2493 t = 0;
2494 change_detector = hotkey_config_change;
2495 }
2496 poll_mask = hotkey_source_mask;
2497 event_mask = hotkey_source_mask &
2498 (hotkey_driver_mask | hotkey_user_mask);
2499 poll_freq = hotkey_poll_freq;
2500 mutex_unlock(&hotkey_thread_data_mutex);
2501
2502 if (likely(poll_mask)) {
2503 hotkey_read_nvram(&s[si], poll_mask);
2504 if (likely(si != so)) {
2505 hotkey_compare_and_issue_event(&s[so], &s[si],
2506 event_mask);
2507 }
2508 }
2509
2510 so = si;
2511 si ^= 1;
2512 }
2513
2514 exit:
2515 return 0;
2516 }
2517
2518 /* call with hotkey_mutex held */
2519 static void hotkey_poll_stop_sync(void)
2520 {
2521 if (tpacpi_hotkey_task) {
2522 kthread_stop(tpacpi_hotkey_task);
2523 tpacpi_hotkey_task = NULL;
2524 }
2525 }
2526
2527 /* call with hotkey_mutex held */
2528 static void hotkey_poll_setup(const bool may_warn)
2529 {
2530 const u32 poll_driver_mask = hotkey_driver_mask & hotkey_source_mask;
2531 const u32 poll_user_mask = hotkey_user_mask & hotkey_source_mask;
2532
2533 if (hotkey_poll_freq > 0 &&
2534 (poll_driver_mask ||
2535 (poll_user_mask && tpacpi_inputdev->users > 0))) {
2536 if (!tpacpi_hotkey_task) {
2537 tpacpi_hotkey_task = kthread_run(hotkey_kthread,
2538 NULL, TPACPI_NVRAM_KTHREAD_NAME);
2539 if (IS_ERR(tpacpi_hotkey_task)) {
2540 tpacpi_hotkey_task = NULL;
2541 pr_err("could not create kernel thread "
2542 "for hotkey polling\n");
2543 }
2544 }
2545 } else {
2546 hotkey_poll_stop_sync();
2547 if (may_warn && (poll_driver_mask || poll_user_mask) &&
2548 hotkey_poll_freq == 0) {
2549 pr_notice("hot keys 0x%08x and/or events 0x%08x "
2550 "require polling, which is currently "
2551 "disabled\n",
2552 poll_user_mask, poll_driver_mask);
2553 }
2554 }
2555 }
2556
2557 static void hotkey_poll_setup_safe(const bool may_warn)
2558 {
2559 mutex_lock(&hotkey_mutex);
2560 hotkey_poll_setup(may_warn);
2561 mutex_unlock(&hotkey_mutex);
2562 }
2563
2564 /* call with hotkey_mutex held */
2565 static void hotkey_poll_set_freq(unsigned int freq)
2566 {
2567 if (!freq)
2568 hotkey_poll_stop_sync();
2569
2570 hotkey_poll_freq = freq;
2571 }
2572
2573 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2574
2575 static void hotkey_poll_setup(const bool __unused)
2576 {
2577 }
2578
2579 static void hotkey_poll_setup_safe(const bool __unused)
2580 {
2581 }
2582
2583 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2584
2585 static int hotkey_inputdev_open(struct input_dev *dev)
2586 {
2587 switch (tpacpi_lifecycle) {
2588 case TPACPI_LIFE_INIT:
2589 case TPACPI_LIFE_RUNNING:
2590 hotkey_poll_setup_safe(false);
2591 return 0;
2592 case TPACPI_LIFE_EXITING:
2593 return -EBUSY;
2594 }
2595
2596 /* Should only happen if tpacpi_lifecycle is corrupt */
2597 BUG();
2598 return -EBUSY;
2599 }
2600
2601 static void hotkey_inputdev_close(struct input_dev *dev)
2602 {
2603 /* disable hotkey polling when possible */
2604 if (tpacpi_lifecycle != TPACPI_LIFE_EXITING &&
2605 !(hotkey_source_mask & hotkey_driver_mask))
2606 hotkey_poll_setup_safe(false);
2607 }
2608
2609 /* sysfs hotkey enable ------------------------------------------------- */
2610 static ssize_t hotkey_enable_show(struct device *dev,
2611 struct device_attribute *attr,
2612 char *buf)
2613 {
2614 int res, status;
2615
2616 printk_deprecated_attribute("hotkey_enable",
2617 "Hotkey reporting is always enabled");
2618
2619 res = hotkey_status_get(&status);
2620 if (res)
2621 return res;
2622
2623 return snprintf(buf, PAGE_SIZE, "%d\n", status);
2624 }
2625
2626 static ssize_t hotkey_enable_store(struct device *dev,
2627 struct device_attribute *attr,
2628 const char *buf, size_t count)
2629 {
2630 unsigned long t;
2631
2632 printk_deprecated_attribute("hotkey_enable",
2633 "Hotkeys can be disabled through hotkey_mask");
2634
2635 if (parse_strtoul(buf, 1, &t))
2636 return -EINVAL;
2637
2638 if (t == 0)
2639 return -EPERM;
2640
2641 return count;
2642 }
2643
2644 static struct device_attribute dev_attr_hotkey_enable =
2645 __ATTR(hotkey_enable, S_IWUSR | S_IRUGO,
2646 hotkey_enable_show, hotkey_enable_store);
2647
2648 /* sysfs hotkey mask --------------------------------------------------- */
2649 static ssize_t hotkey_mask_show(struct device *dev,
2650 struct device_attribute *attr,
2651 char *buf)
2652 {
2653 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_user_mask);
2654 }
2655
2656 static ssize_t hotkey_mask_store(struct device *dev,
2657 struct device_attribute *attr,
2658 const char *buf, size_t count)
2659 {
2660 unsigned long t;
2661 int res;
2662
2663 if (parse_strtoul(buf, 0xffffffffUL, &t))
2664 return -EINVAL;
2665
2666 if (mutex_lock_killable(&hotkey_mutex))
2667 return -ERESTARTSYS;
2668
2669 res = hotkey_user_mask_set(t);
2670
2671 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2672 hotkey_poll_setup(true);
2673 #endif
2674
2675 mutex_unlock(&hotkey_mutex);
2676
2677 tpacpi_disclose_usertask("hotkey_mask", "set to 0x%08lx\n", t);
2678
2679 return (res) ? res : count;
2680 }
2681
2682 static struct device_attribute dev_attr_hotkey_mask =
2683 __ATTR(hotkey_mask, S_IWUSR | S_IRUGO,
2684 hotkey_mask_show, hotkey_mask_store);
2685
2686 /* sysfs hotkey bios_enabled ------------------------------------------- */
2687 static ssize_t hotkey_bios_enabled_show(struct device *dev,
2688 struct device_attribute *attr,
2689 char *buf)
2690 {
2691 return sprintf(buf, "0\n");
2692 }
2693
2694 static struct device_attribute dev_attr_hotkey_bios_enabled =
2695 __ATTR(hotkey_bios_enabled, S_IRUGO, hotkey_bios_enabled_show, NULL);
2696
2697 /* sysfs hotkey bios_mask ---------------------------------------------- */
2698 static ssize_t hotkey_bios_mask_show(struct device *dev,
2699 struct device_attribute *attr,
2700 char *buf)
2701 {
2702 printk_deprecated_attribute("hotkey_bios_mask",
2703 "This attribute is useless.");
2704 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_orig_mask);
2705 }
2706
2707 static struct device_attribute dev_attr_hotkey_bios_mask =
2708 __ATTR(hotkey_bios_mask, S_IRUGO, hotkey_bios_mask_show, NULL);
2709
2710 /* sysfs hotkey all_mask ----------------------------------------------- */
2711 static ssize_t hotkey_all_mask_show(struct device *dev,
2712 struct device_attribute *attr,
2713 char *buf)
2714 {
2715 return snprintf(buf, PAGE_SIZE, "0x%08x\n",
2716 hotkey_all_mask | hotkey_source_mask);
2717 }
2718
2719 static struct device_attribute dev_attr_hotkey_all_mask =
2720 __ATTR(hotkey_all_mask, S_IRUGO, hotkey_all_mask_show, NULL);
2721
2722 /* sysfs hotkey recommended_mask --------------------------------------- */
2723 static ssize_t hotkey_recommended_mask_show(struct device *dev,
2724 struct device_attribute *attr,
2725 char *buf)
2726 {
2727 return snprintf(buf, PAGE_SIZE, "0x%08x\n",
2728 (hotkey_all_mask | hotkey_source_mask)
2729 & ~hotkey_reserved_mask);
2730 }
2731
2732 static struct device_attribute dev_attr_hotkey_recommended_mask =
2733 __ATTR(hotkey_recommended_mask, S_IRUGO,
2734 hotkey_recommended_mask_show, NULL);
2735
2736 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2737
2738 /* sysfs hotkey hotkey_source_mask ------------------------------------- */
2739 static ssize_t hotkey_source_mask_show(struct device *dev,
2740 struct device_attribute *attr,
2741 char *buf)
2742 {
2743 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_source_mask);
2744 }
2745
2746 static ssize_t hotkey_source_mask_store(struct device *dev,
2747 struct device_attribute *attr,
2748 const char *buf, size_t count)
2749 {
2750 unsigned long t;
2751 u32 r_ev;
2752 int rc;
2753
2754 if (parse_strtoul(buf, 0xffffffffUL, &t) ||
2755 ((t & ~TPACPI_HKEY_NVRAM_KNOWN_MASK) != 0))
2756 return -EINVAL;
2757
2758 if (mutex_lock_killable(&hotkey_mutex))
2759 return -ERESTARTSYS;
2760
2761 HOTKEY_CONFIG_CRITICAL_START
2762 hotkey_source_mask = t;
2763 HOTKEY_CONFIG_CRITICAL_END
2764
2765 rc = hotkey_mask_set((hotkey_user_mask | hotkey_driver_mask) &
2766 ~hotkey_source_mask);
2767 hotkey_poll_setup(true);
2768
2769 /* check if events needed by the driver got disabled */
2770 r_ev = hotkey_driver_mask & ~(hotkey_acpi_mask & hotkey_all_mask)
2771 & ~hotkey_source_mask & TPACPI_HKEY_NVRAM_KNOWN_MASK;
2772
2773 mutex_unlock(&hotkey_mutex);
2774
2775 if (rc < 0)
2776 pr_err("hotkey_source_mask: "
2777 "failed to update the firmware event mask!\n");
2778
2779 if (r_ev)
2780 pr_notice("hotkey_source_mask: "
2781 "some important events were disabled: 0x%04x\n",
2782 r_ev);
2783
2784 tpacpi_disclose_usertask("hotkey_source_mask", "set to 0x%08lx\n", t);
2785
2786 return (rc < 0) ? rc : count;
2787 }
2788
2789 static struct device_attribute dev_attr_hotkey_source_mask =
2790 __ATTR(hotkey_source_mask, S_IWUSR | S_IRUGO,
2791 hotkey_source_mask_show, hotkey_source_mask_store);
2792
2793 /* sysfs hotkey hotkey_poll_freq --------------------------------------- */
2794 static ssize_t hotkey_poll_freq_show(struct device *dev,
2795 struct device_attribute *attr,
2796 char *buf)
2797 {
2798 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_poll_freq);
2799 }
2800
2801 static ssize_t hotkey_poll_freq_store(struct device *dev,
2802 struct device_attribute *attr,
2803 const char *buf, size_t count)
2804 {
2805 unsigned long t;
2806
2807 if (parse_strtoul(buf, 25, &t))
2808 return -EINVAL;
2809
2810 if (mutex_lock_killable(&hotkey_mutex))
2811 return -ERESTARTSYS;
2812
2813 hotkey_poll_set_freq(t);
2814 hotkey_poll_setup(true);
2815
2816 mutex_unlock(&hotkey_mutex);
2817
2818 tpacpi_disclose_usertask("hotkey_poll_freq", "set to %lu\n", t);
2819
2820 return count;
2821 }
2822
2823 static struct device_attribute dev_attr_hotkey_poll_freq =
2824 __ATTR(hotkey_poll_freq, S_IWUSR | S_IRUGO,
2825 hotkey_poll_freq_show, hotkey_poll_freq_store);
2826
2827 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2828
2829 /* sysfs hotkey radio_sw (pollable) ------------------------------------ */
2830 static ssize_t hotkey_radio_sw_show(struct device *dev,
2831 struct device_attribute *attr,
2832 char *buf)
2833 {
2834 int res;
2835 res = hotkey_get_wlsw();
2836 if (res < 0)
2837 return res;
2838
2839 /* Opportunistic update */
2840 tpacpi_rfk_update_hwblock_state((res == TPACPI_RFK_RADIO_OFF));
2841
2842 return snprintf(buf, PAGE_SIZE, "%d\n",
2843 (res == TPACPI_RFK_RADIO_OFF) ? 0 : 1);
2844 }
2845
2846 static struct device_attribute dev_attr_hotkey_radio_sw =
2847 __ATTR(hotkey_radio_sw, S_IRUGO, hotkey_radio_sw_show, NULL);
2848
2849 static void hotkey_radio_sw_notify_change(void)
2850 {
2851 if (tp_features.hotkey_wlsw)
2852 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2853 "hotkey_radio_sw");
2854 }
2855
2856 /* sysfs hotkey tablet mode (pollable) --------------------------------- */
2857 static ssize_t hotkey_tablet_mode_show(struct device *dev,
2858 struct device_attribute *attr,
2859 char *buf)
2860 {
2861 int res, s;
2862 res = hotkey_get_tablet_mode(&s);
2863 if (res < 0)
2864 return res;
2865
2866 return snprintf(buf, PAGE_SIZE, "%d\n", !!s);
2867 }
2868
2869 static struct device_attribute dev_attr_hotkey_tablet_mode =
2870 __ATTR(hotkey_tablet_mode, S_IRUGO, hotkey_tablet_mode_show, NULL);
2871
2872 static void hotkey_tablet_mode_notify_change(void)
2873 {
2874 if (tp_features.hotkey_tablet)
2875 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2876 "hotkey_tablet_mode");
2877 }
2878
2879 /* sysfs wakeup reason (pollable) -------------------------------------- */
2880 static ssize_t hotkey_wakeup_reason_show(struct device *dev,
2881 struct device_attribute *attr,
2882 char *buf)
2883 {
2884 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_wakeup_reason);
2885 }
2886
2887 static struct device_attribute dev_attr_hotkey_wakeup_reason =
2888 __ATTR(wakeup_reason, S_IRUGO, hotkey_wakeup_reason_show, NULL);
2889
2890 static void hotkey_wakeup_reason_notify_change(void)
2891 {
2892 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2893 "wakeup_reason");
2894 }
2895
2896 /* sysfs wakeup hotunplug_complete (pollable) -------------------------- */
2897 static ssize_t hotkey_wakeup_hotunplug_complete_show(struct device *dev,
2898 struct device_attribute *attr,
2899 char *buf)
2900 {
2901 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_autosleep_ack);
2902 }
2903
2904 static struct device_attribute dev_attr_hotkey_wakeup_hotunplug_complete =
2905 __ATTR(wakeup_hotunplug_complete, S_IRUGO,
2906 hotkey_wakeup_hotunplug_complete_show, NULL);
2907
2908 static void hotkey_wakeup_hotunplug_complete_notify_change(void)
2909 {
2910 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2911 "wakeup_hotunplug_complete");
2912 }
2913
2914 /* --------------------------------------------------------------------- */
2915
2916 static struct attribute *hotkey_attributes[] __initdata = {
2917 &dev_attr_hotkey_enable.attr,
2918 &dev_attr_hotkey_bios_enabled.attr,
2919 &dev_attr_hotkey_bios_mask.attr,
2920 &dev_attr_hotkey_wakeup_reason.attr,
2921 &dev_attr_hotkey_wakeup_hotunplug_complete.attr,
2922 &dev_attr_hotkey_mask.attr,
2923 &dev_attr_hotkey_all_mask.attr,
2924 &dev_attr_hotkey_recommended_mask.attr,
2925 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2926 &dev_attr_hotkey_source_mask.attr,
2927 &dev_attr_hotkey_poll_freq.attr,
2928 #endif
2929 };
2930
2931 /*
2932 * Sync both the hw and sw blocking state of all switches
2933 */
2934 static void tpacpi_send_radiosw_update(void)
2935 {
2936 int wlsw;
2937
2938 /*
2939 * We must sync all rfkill controllers *before* issuing any
2940 * rfkill input events, or we will race the rfkill core input
2941 * handler.
2942 *
2943 * tpacpi_inputdev_send_mutex works as a synchronization point
2944 * for the above.
2945 *
2946 * We optimize to avoid numerous calls to hotkey_get_wlsw.
2947 */
2948
2949 wlsw = hotkey_get_wlsw();
2950
2951 /* Sync hw blocking state first if it is hw-blocked */
2952 if (wlsw == TPACPI_RFK_RADIO_OFF)
2953 tpacpi_rfk_update_hwblock_state(true);
2954
2955 /* Sync sw blocking state */
2956 tpacpi_rfk_update_swstate_all();
2957
2958 /* Sync hw blocking state last if it is hw-unblocked */
2959 if (wlsw == TPACPI_RFK_RADIO_ON)
2960 tpacpi_rfk_update_hwblock_state(false);
2961
2962 /* Issue rfkill input event for WLSW switch */
2963 if (!(wlsw < 0)) {
2964 mutex_lock(&tpacpi_inputdev_send_mutex);
2965
2966 input_report_switch(tpacpi_inputdev,
2967 SW_RFKILL_ALL, (wlsw > 0));
2968 input_sync(tpacpi_inputdev);
2969
2970 mutex_unlock(&tpacpi_inputdev_send_mutex);
2971 }
2972
2973 /*
2974 * this can be unconditional, as we will poll state again
2975 * if userspace uses the notify to read data
2976 */
2977 hotkey_radio_sw_notify_change();
2978 }
2979
2980 static void hotkey_exit(void)
2981 {
2982 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2983 mutex_lock(&hotkey_mutex);
2984 hotkey_poll_stop_sync();
2985 mutex_unlock(&hotkey_mutex);
2986 #endif
2987
2988 if (hotkey_dev_attributes)
2989 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
2990
2991 dbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_HKEY,
2992 "restoring original HKEY status and mask\n");
2993 /* yes, there is a bitwise or below, we want the
2994 * functions to be called even if one of them fail */
2995 if (((tp_features.hotkey_mask &&
2996 hotkey_mask_set(hotkey_orig_mask)) |
2997 hotkey_status_set(false)) != 0)
2998 pr_err("failed to restore hot key mask "
2999 "to BIOS defaults\n");
3000 }
3001
3002 static void __init hotkey_unmap(const unsigned int scancode)
3003 {
3004 if (hotkey_keycode_map[scancode] != KEY_RESERVED) {
3005 clear_bit(hotkey_keycode_map[scancode],
3006 tpacpi_inputdev->keybit);
3007 hotkey_keycode_map[scancode] = KEY_RESERVED;
3008 }
3009 }
3010
3011 /*
3012 * HKEY quirks:
3013 * TPACPI_HK_Q_INIMASK: Supports FN+F3,FN+F4,FN+F12
3014 */
3015
3016 #define TPACPI_HK_Q_INIMASK 0x0001
3017
3018 static const struct tpacpi_quirk tpacpi_hotkey_qtable[] __initconst = {
3019 TPACPI_Q_IBM('I', 'H', TPACPI_HK_Q_INIMASK), /* 600E */
3020 TPACPI_Q_IBM('I', 'N', TPACPI_HK_Q_INIMASK), /* 600E */
3021 TPACPI_Q_IBM('I', 'D', TPACPI_HK_Q_INIMASK), /* 770, 770E, 770ED */
3022 TPACPI_Q_IBM('I', 'W', TPACPI_HK_Q_INIMASK), /* A20m */
3023 TPACPI_Q_IBM('I', 'V', TPACPI_HK_Q_INIMASK), /* A20p */
3024 TPACPI_Q_IBM('1', '0', TPACPI_HK_Q_INIMASK), /* A21e, A22e */
3025 TPACPI_Q_IBM('K', 'U', TPACPI_HK_Q_INIMASK), /* A21e */
3026 TPACPI_Q_IBM('K', 'X', TPACPI_HK_Q_INIMASK), /* A21m, A22m */
3027 TPACPI_Q_IBM('K', 'Y', TPACPI_HK_Q_INIMASK), /* A21p, A22p */
3028 TPACPI_Q_IBM('1', 'B', TPACPI_HK_Q_INIMASK), /* A22e */
3029 TPACPI_Q_IBM('1', '3', TPACPI_HK_Q_INIMASK), /* A22m */
3030 TPACPI_Q_IBM('1', 'E', TPACPI_HK_Q_INIMASK), /* A30/p (0) */
3031 TPACPI_Q_IBM('1', 'C', TPACPI_HK_Q_INIMASK), /* R30 */
3032 TPACPI_Q_IBM('1', 'F', TPACPI_HK_Q_INIMASK), /* R31 */
3033 TPACPI_Q_IBM('I', 'Y', TPACPI_HK_Q_INIMASK), /* T20 */
3034 TPACPI_Q_IBM('K', 'Z', TPACPI_HK_Q_INIMASK), /* T21 */
3035 TPACPI_Q_IBM('1', '6', TPACPI_HK_Q_INIMASK), /* T22 */
3036 TPACPI_Q_IBM('I', 'Z', TPACPI_HK_Q_INIMASK), /* X20, X21 */
3037 TPACPI_Q_IBM('1', 'D', TPACPI_HK_Q_INIMASK), /* X22, X23, X24 */
3038 };
3039
3040 typedef u16 tpacpi_keymap_entry_t;
3041 typedef tpacpi_keymap_entry_t tpacpi_keymap_t[TPACPI_HOTKEY_MAP_LEN];
3042
3043 static int __init hotkey_init(struct ibm_init_struct *iibm)
3044 {
3045 /* Requirements for changing the default keymaps:
3046 *
3047 * 1. Many of the keys are mapped to KEY_RESERVED for very
3048 * good reasons. Do not change them unless you have deep
3049 * knowledge on the IBM and Lenovo ThinkPad firmware for
3050 * the various ThinkPad models. The driver behaves
3051 * differently for KEY_RESERVED: such keys have their
3052 * hot key mask *unset* in mask_recommended, and also
3053 * in the initial hot key mask programmed into the
3054 * firmware at driver load time, which means the firm-
3055 * ware may react very differently if you change them to
3056 * something else;
3057 *
3058 * 2. You must be subscribed to the linux-thinkpad and
3059 * ibm-acpi-devel mailing lists, and you should read the
3060 * list archives since 2007 if you want to change the
3061 * keymaps. This requirement exists so that you will
3062 * know the past history of problems with the thinkpad-
3063 * acpi driver keymaps, and also that you will be
3064 * listening to any bug reports;
3065 *
3066 * 3. Do not send thinkpad-acpi specific patches directly to
3067 * for merging, *ever*. Send them to the linux-acpi
3068 * mailinglist for comments. Merging is to be done only
3069 * through acpi-test and the ACPI maintainer.
3070 *
3071 * If the above is too much to ask, don't change the keymap.
3072 * Ask the thinkpad-acpi maintainer to do it, instead.
3073 */
3074
3075 enum keymap_index {
3076 TPACPI_KEYMAP_IBM_GENERIC = 0,
3077 TPACPI_KEYMAP_LENOVO_GENERIC,
3078 };
3079
3080 static const tpacpi_keymap_t tpacpi_keymaps[] __initconst = {
3081 /* Generic keymap for IBM ThinkPads */
3082 [TPACPI_KEYMAP_IBM_GENERIC] = {
3083 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
3084 KEY_FN_F1, KEY_BATTERY, KEY_COFFEE, KEY_SLEEP,
3085 KEY_WLAN, KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
3086 KEY_FN_F9, KEY_FN_F10, KEY_FN_F11, KEY_SUSPEND,
3087
3088 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
3089 KEY_UNKNOWN, /* 0x0C: FN+BACKSPACE */
3090 KEY_UNKNOWN, /* 0x0D: FN+INSERT */
3091 KEY_UNKNOWN, /* 0x0E: FN+DELETE */
3092
3093 /* brightness: firmware always reacts to them */
3094 KEY_RESERVED, /* 0x0F: FN+HOME (brightness up) */
3095 KEY_RESERVED, /* 0x10: FN+END (brightness down) */
3096
3097 /* Thinklight: firmware always react to it */
3098 KEY_RESERVED, /* 0x11: FN+PGUP (thinklight toggle) */
3099
3100 KEY_UNKNOWN, /* 0x12: FN+PGDOWN */
3101 KEY_ZOOM, /* 0x13: FN+SPACE (zoom) */
3102
3103 /* Volume: firmware always react to it and reprograms
3104 * the built-in *extra* mixer. Never map it to control
3105 * another mixer by default. */
3106 KEY_RESERVED, /* 0x14: VOLUME UP */
3107 KEY_RESERVED, /* 0x15: VOLUME DOWN */
3108 KEY_RESERVED, /* 0x16: MUTE */
3109
3110 KEY_VENDOR, /* 0x17: Thinkpad/AccessIBM/Lenovo */
3111
3112 /* (assignments unknown, please report if found) */
3113 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3114 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3115 },
3116
3117 /* Generic keymap for Lenovo ThinkPads */
3118 [TPACPI_KEYMAP_LENOVO_GENERIC] = {
3119 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
3120 KEY_FN_F1, KEY_COFFEE, KEY_BATTERY, KEY_SLEEP,
3121 KEY_WLAN, KEY_CAMERA, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
3122 KEY_FN_F9, KEY_FN_F10, KEY_FN_F11, KEY_SUSPEND,
3123
3124 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
3125 KEY_UNKNOWN, /* 0x0C: FN+BACKSPACE */
3126 KEY_UNKNOWN, /* 0x0D: FN+INSERT */
3127 KEY_UNKNOWN, /* 0x0E: FN+DELETE */
3128
3129 /* These should be enabled --only-- when ACPI video
3130 * is disabled (i.e. in "vendor" mode), and are handled
3131 * in a special way by the init code */
3132 KEY_BRIGHTNESSUP, /* 0x0F: FN+HOME (brightness up) */
3133 KEY_BRIGHTNESSDOWN, /* 0x10: FN+END (brightness down) */
3134
3135 KEY_RESERVED, /* 0x11: FN+PGUP (thinklight toggle) */
3136
3137 KEY_UNKNOWN, /* 0x12: FN+PGDOWN */
3138 KEY_ZOOM, /* 0x13: FN+SPACE (zoom) */
3139
3140 /* Volume: z60/z61, T60 (BIOS version?): firmware always
3141 * react to it and reprograms the built-in *extra* mixer.
3142 * Never map it to control another mixer by default.
3143 *
3144 * T60?, T61, R60?, R61: firmware and EC tries to send
3145 * these over the regular keyboard, so these are no-ops,
3146 * but there are still weird bugs re. MUTE, so do not
3147 * change unless you get test reports from all Lenovo
3148 * models. May cause the BIOS to interfere with the
3149 * HDA mixer.
3150 */
3151 KEY_RESERVED, /* 0x14: VOLUME UP */
3152 KEY_RESERVED, /* 0x15: VOLUME DOWN */
3153 KEY_RESERVED, /* 0x16: MUTE */
3154
3155 KEY_VENDOR, /* 0x17: Thinkpad/AccessIBM/Lenovo */
3156
3157 /* (assignments unknown, please report if found) */
3158 KEY_UNKNOWN, KEY_UNKNOWN,
3159
3160 /*
3161 * The mic mute button only sends 0x1a. It does not
3162 * automatically mute the mic or change the mute light.
3163 */
3164 KEY_MICMUTE, /* 0x1a: Mic mute (since ?400 or so) */
3165
3166 /* (assignments unknown, please report if found) */
3167 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3168 KEY_UNKNOWN,
3169 },
3170 };
3171
3172 static const struct tpacpi_quirk tpacpi_keymap_qtable[] __initconst = {
3173 /* Generic maps (fallback) */
3174 {
3175 .vendor = PCI_VENDOR_ID_IBM,
3176 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY,
3177 .quirks = TPACPI_KEYMAP_IBM_GENERIC,
3178 },
3179 {
3180 .vendor = PCI_VENDOR_ID_LENOVO,
3181 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY,
3182 .quirks = TPACPI_KEYMAP_LENOVO_GENERIC,
3183 },
3184 };
3185
3186 #define TPACPI_HOTKEY_MAP_SIZE sizeof(tpacpi_keymap_t)
3187 #define TPACPI_HOTKEY_MAP_TYPESIZE sizeof(tpacpi_keymap_entry_t)
3188
3189 int res, i;
3190 int status;
3191 int hkeyv;
3192 bool radiosw_state = false;
3193 bool tabletsw_state = false;
3194
3195 unsigned long quirks;
3196 unsigned long keymap_id;
3197
3198 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3199 "initializing hotkey subdriver\n");
3200
3201 BUG_ON(!tpacpi_inputdev);
3202 BUG_ON(tpacpi_inputdev->open != NULL ||
3203 tpacpi_inputdev->close != NULL);
3204
3205 TPACPI_ACPIHANDLE_INIT(hkey);
3206 mutex_init(&hotkey_mutex);
3207
3208 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
3209 mutex_init(&hotkey_thread_data_mutex);
3210 #endif
3211
3212 /* hotkey not supported on 570 */
3213 tp_features.hotkey = hkey_handle != NULL;
3214
3215 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3216 "hotkeys are %s\n",
3217 str_supported(tp_features.hotkey));
3218
3219 if (!tp_features.hotkey)
3220 return 1;
3221
3222 quirks = tpacpi_check_quirks(tpacpi_hotkey_qtable,
3223 ARRAY_SIZE(tpacpi_hotkey_qtable));
3224
3225 tpacpi_disable_brightness_delay();
3226
3227 /* MUST have enough space for all attributes to be added to
3228 * hotkey_dev_attributes */
3229 hotkey_dev_attributes = create_attr_set(
3230 ARRAY_SIZE(hotkey_attributes) + 2,
3231 NULL);
3232 if (!hotkey_dev_attributes)
3233 return -ENOMEM;
3234 res = add_many_to_attr_set(hotkey_dev_attributes,
3235 hotkey_attributes,
3236 ARRAY_SIZE(hotkey_attributes));
3237 if (res)
3238 goto err_exit;
3239
3240 /* mask not supported on 600e/x, 770e, 770x, A21e, A2xm/p,
3241 A30, R30, R31, T20-22, X20-21, X22-24. Detected by checking
3242 for HKEY interface version 0x100 */
3243 if (acpi_evalf(hkey_handle, &hkeyv, "MHKV", "qd")) {
3244 if ((hkeyv >> 8) != 1) {
3245 pr_err("unknown version of the HKEY interface: 0x%x\n",
3246 hkeyv);
3247 pr_err("please report this to %s\n", TPACPI_MAIL);
3248 } else {
3249 /*
3250 * MHKV 0x100 in A31, R40, R40e,
3251 * T4x, X31, and later
3252 */
3253 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3254 "firmware HKEY interface version: 0x%x\n",
3255 hkeyv);
3256
3257 /* Paranoia check AND init hotkey_all_mask */
3258 if (!acpi_evalf(hkey_handle, &hotkey_all_mask,
3259 "MHKA", "qd")) {
3260 pr_err("missing MHKA handler, "
3261 "please report this to %s\n",
3262 TPACPI_MAIL);
3263 /* Fallback: pre-init for FN+F3,F4,F12 */
3264 hotkey_all_mask = 0x080cU;
3265 } else {
3266 tp_features.hotkey_mask = 1;
3267 }
3268 }
3269 }
3270
3271 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3272 "hotkey masks are %s\n",
3273 str_supported(tp_features.hotkey_mask));
3274
3275 /* Init hotkey_all_mask if not initialized yet */
3276 if (!tp_features.hotkey_mask && !hotkey_all_mask &&
3277 (quirks & TPACPI_HK_Q_INIMASK))
3278 hotkey_all_mask = 0x080cU; /* FN+F12, FN+F4, FN+F3 */
3279
3280 /* Init hotkey_acpi_mask and hotkey_orig_mask */
3281 if (tp_features.hotkey_mask) {
3282 /* hotkey_source_mask *must* be zero for
3283 * the first hotkey_mask_get to return hotkey_orig_mask */
3284 res = hotkey_mask_get();
3285 if (res)
3286 goto err_exit;
3287
3288 hotkey_orig_mask = hotkey_acpi_mask;
3289 } else {
3290 hotkey_orig_mask = hotkey_all_mask;
3291 hotkey_acpi_mask = hotkey_all_mask;
3292 }
3293
3294 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3295 if (dbg_wlswemul) {
3296 tp_features.hotkey_wlsw = 1;
3297 radiosw_state = !!tpacpi_wlsw_emulstate;
3298 pr_info("radio switch emulation enabled\n");
3299 } else
3300 #endif
3301 /* Not all thinkpads have a hardware radio switch */
3302 if (acpi_evalf(hkey_handle, &status, "WLSW", "qd")) {
3303 tp_features.hotkey_wlsw = 1;
3304 radiosw_state = !!status;
3305 pr_info("radio switch found; radios are %s\n",
3306 enabled(status, 0));
3307 }
3308 if (tp_features.hotkey_wlsw)
3309 res = add_to_attr_set(hotkey_dev_attributes,
3310 &dev_attr_hotkey_radio_sw.attr);
3311
3312 /* For X41t, X60t, X61t Tablets... */
3313 if (!res && acpi_evalf(hkey_handle, &status, "MHKG", "qd")) {
3314 tp_features.hotkey_tablet = 1;
3315 tabletsw_state = !!(status & TP_HOTKEY_TABLET_MASK);
3316 pr_info("possible tablet mode switch found; "
3317 "ThinkPad in %s mode\n",
3318 (tabletsw_state) ? "tablet" : "laptop");
3319 res = add_to_attr_set(hotkey_dev_attributes,
3320 &dev_attr_hotkey_tablet_mode.attr);
3321 }
3322
3323 if (!res)
3324 res = register_attr_set_with_sysfs(
3325 hotkey_dev_attributes,
3326 &tpacpi_pdev->dev.kobj);
3327 if (res)
3328 goto err_exit;
3329
3330 /* Set up key map */
3331 hotkey_keycode_map = kmalloc(TPACPI_HOTKEY_MAP_SIZE,
3332 GFP_KERNEL);
3333 if (!hotkey_keycode_map) {
3334 pr_err("failed to allocate memory for key map\n");
3335 res = -ENOMEM;
3336 goto err_exit;
3337 }
3338
3339 keymap_id = tpacpi_check_quirks(tpacpi_keymap_qtable,
3340 ARRAY_SIZE(tpacpi_keymap_qtable));
3341 BUG_ON(keymap_id >= ARRAY_SIZE(tpacpi_keymaps));
3342 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3343 "using keymap number %lu\n", keymap_id);
3344
3345 memcpy(hotkey_keycode_map, &tpacpi_keymaps[keymap_id],
3346 TPACPI_HOTKEY_MAP_SIZE);
3347
3348 input_set_capability(tpacpi_inputdev, EV_MSC, MSC_SCAN);
3349 tpacpi_inputdev->keycodesize = TPACPI_HOTKEY_MAP_TYPESIZE;
3350 tpacpi_inputdev->keycodemax = TPACPI_HOTKEY_MAP_LEN;
3351 tpacpi_inputdev->keycode = hotkey_keycode_map;
3352 for (i = 0; i < TPACPI_HOTKEY_MAP_LEN; i++) {
3353 if (hotkey_keycode_map[i] != KEY_RESERVED) {
3354 input_set_capability(tpacpi_inputdev, EV_KEY,
3355 hotkey_keycode_map[i]);
3356 } else {
3357 if (i < sizeof(hotkey_reserved_mask)*8)
3358 hotkey_reserved_mask |= 1 << i;
3359 }
3360 }
3361
3362 if (tp_features.hotkey_wlsw) {
3363 input_set_capability(tpacpi_inputdev, EV_SW, SW_RFKILL_ALL);
3364 input_report_switch(tpacpi_inputdev,
3365 SW_RFKILL_ALL, radiosw_state);
3366 }
3367 if (tp_features.hotkey_tablet) {
3368 input_set_capability(tpacpi_inputdev, EV_SW, SW_TABLET_MODE);
3369 input_report_switch(tpacpi_inputdev,
3370 SW_TABLET_MODE, tabletsw_state);
3371 }
3372
3373 /* Do not issue duplicate brightness change events to
3374 * userspace. tpacpi_detect_brightness_capabilities() must have
3375 * been called before this point */
3376 if (acpi_video_backlight_support()) {
3377 pr_info("This ThinkPad has standard ACPI backlight "
3378 "brightness control, supported by the ACPI "
3379 "video driver\n");
3380 pr_notice("Disabling thinkpad-acpi brightness events "
3381 "by default...\n");
3382
3383 /* Disable brightness up/down on Lenovo thinkpads when
3384 * ACPI is handling them, otherwise it is plain impossible
3385 * for userspace to do something even remotely sane */
3386 hotkey_reserved_mask |=
3387 (1 << TP_ACPI_HOTKEYSCAN_FNHOME)
3388 | (1 << TP_ACPI_HOTKEYSCAN_FNEND);
3389 hotkey_unmap(TP_ACPI_HOTKEYSCAN_FNHOME);
3390 hotkey_unmap(TP_ACPI_HOTKEYSCAN_FNEND);
3391 }
3392
3393 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
3394 hotkey_source_mask = TPACPI_HKEY_NVRAM_GOOD_MASK
3395 & ~hotkey_all_mask
3396 & ~hotkey_reserved_mask;
3397
3398 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3399 "hotkey source mask 0x%08x, polling freq %u\n",
3400 hotkey_source_mask, hotkey_poll_freq);
3401 #endif
3402
3403 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3404 "enabling firmware HKEY event interface...\n");
3405 res = hotkey_status_set(true);
3406 if (res) {
3407 hotkey_exit();
3408 return res;
3409 }
3410 res = hotkey_mask_set(((hotkey_all_mask & ~hotkey_reserved_mask)
3411 | hotkey_driver_mask)
3412 & ~hotkey_source_mask);
3413 if (res < 0 && res != -ENXIO) {
3414 hotkey_exit();
3415 return res;
3416 }
3417 hotkey_user_mask = (hotkey_acpi_mask | hotkey_source_mask)
3418 & ~hotkey_reserved_mask;
3419 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3420 "initial masks: user=0x%08x, fw=0x%08x, poll=0x%08x\n",
3421 hotkey_user_mask, hotkey_acpi_mask, hotkey_source_mask);
3422
3423 tpacpi_inputdev->open = &hotkey_inputdev_open;
3424 tpacpi_inputdev->close = &hotkey_inputdev_close;
3425
3426 hotkey_poll_setup_safe(true);
3427
3428 return 0;
3429
3430 err_exit:
3431 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
3432 hotkey_dev_attributes = NULL;
3433
3434 return (res < 0)? res : 1;
3435 }
3436
3437 static bool hotkey_notify_hotkey(const u32 hkey,
3438 bool *send_acpi_ev,
3439 bool *ignore_acpi_ev)
3440 {
3441 /* 0x1000-0x1FFF: key presses */
3442 unsigned int scancode = hkey & 0xfff;
3443 *send_acpi_ev = true;
3444 *ignore_acpi_ev = false;
3445
3446 /* HKEY event 0x1001 is scancode 0x00 */
3447 if (scancode > 0 && scancode <= TPACPI_HOTKEY_MAP_LEN) {
3448 scancode--;
3449 if (!(hotkey_source_mask & (1 << scancode))) {
3450 tpacpi_input_send_key_masked(scancode);
3451 *send_acpi_ev = false;
3452 } else {
3453 *ignore_acpi_ev = true;
3454 }
3455 return true;
3456 }
3457 return false;
3458 }
3459
3460 static bool hotkey_notify_wakeup(const u32 hkey,
3461 bool *send_acpi_ev,
3462 bool *ignore_acpi_ev)
3463 {
3464 /* 0x2000-0x2FFF: Wakeup reason */
3465 *send_acpi_ev = true;
3466 *ignore_acpi_ev = false;
3467
3468 switch (hkey) {
3469 case TP_HKEY_EV_WKUP_S3_UNDOCK: /* suspend, undock */
3470 case TP_HKEY_EV_WKUP_S4_UNDOCK: /* hibernation, undock */
3471 hotkey_wakeup_reason = TP_ACPI_WAKEUP_UNDOCK;
3472 *ignore_acpi_ev = true;
3473 break;
3474
3475 case TP_HKEY_EV_WKUP_S3_BAYEJ: /* suspend, bay eject */
3476 case TP_HKEY_EV_WKUP_S4_BAYEJ: /* hibernation, bay eject */
3477 hotkey_wakeup_reason = TP_ACPI_WAKEUP_BAYEJ;
3478 *ignore_acpi_ev = true;
3479 break;
3480
3481 case TP_HKEY_EV_WKUP_S3_BATLOW: /* Battery on critical low level/S3 */
3482 case TP_HKEY_EV_WKUP_S4_BATLOW: /* Battery on critical low level/S4 */
3483 pr_alert("EMERGENCY WAKEUP: battery almost empty\n");
3484 /* how to auto-heal: */
3485 /* 2313: woke up from S3, go to S4/S5 */
3486 /* 2413: woke up from S4, go to S5 */
3487 break;
3488
3489 default:
3490 return false;
3491 }
3492
3493 if (hotkey_wakeup_reason != TP_ACPI_WAKEUP_NONE) {
3494 pr_info("woke up due to a hot-unplug request...\n");
3495 hotkey_wakeup_reason_notify_change();
3496 }
3497 return true;
3498 }
3499
3500 static bool hotkey_notify_dockevent(const u32 hkey,
3501 bool *send_acpi_ev,
3502 bool *ignore_acpi_ev)
3503 {
3504 /* 0x4000-0x4FFF: dock-related events */
3505 *send_acpi_ev = true;
3506 *ignore_acpi_ev = false;
3507
3508 switch (hkey) {
3509 case TP_HKEY_EV_UNDOCK_ACK:
3510 /* ACPI undock operation completed after wakeup */
3511 hotkey_autosleep_ack = 1;
3512 pr_info("undocked\n");
3513 hotkey_wakeup_hotunplug_complete_notify_change();
3514 return true;
3515
3516 case TP_HKEY_EV_HOTPLUG_DOCK: /* docked to port replicator */
3517 pr_info("docked into hotplug port replicator\n");
3518 return true;
3519 case TP_HKEY_EV_HOTPLUG_UNDOCK: /* undocked from port replicator */
3520 pr_info("undocked from hotplug port replicator\n");
3521 return true;
3522
3523 default:
3524 return false;
3525 }
3526 }
3527
3528 static bool hotkey_notify_usrevent(const u32 hkey,
3529 bool *send_acpi_ev,
3530 bool *ignore_acpi_ev)
3531 {
3532 /* 0x5000-0x5FFF: human interface helpers */
3533 *send_acpi_ev = true;
3534 *ignore_acpi_ev = false;
3535
3536 switch (hkey) {
3537 case TP_HKEY_EV_PEN_INSERTED: /* X61t: tablet pen inserted into bay */
3538 case TP_HKEY_EV_PEN_REMOVED: /* X61t: tablet pen removed from bay */
3539 return true;
3540
3541 case TP_HKEY_EV_TABLET_TABLET: /* X41t-X61t: tablet mode */
3542 case TP_HKEY_EV_TABLET_NOTEBOOK: /* X41t-X61t: normal mode */
3543 tpacpi_input_send_tabletsw();
3544 hotkey_tablet_mode_notify_change();
3545 *send_acpi_ev = false;
3546 return true;
3547
3548 case TP_HKEY_EV_LID_CLOSE: /* Lid closed */
3549 case TP_HKEY_EV_LID_OPEN: /* Lid opened */
3550 case TP_HKEY_EV_BRGHT_CHANGED: /* brightness changed */
3551 /* do not propagate these events */
3552 *ignore_acpi_ev = true;
3553 return true;
3554
3555 default:
3556 return false;
3557 }
3558 }
3559
3560 static void thermal_dump_all_sensors(void);
3561
3562 static bool hotkey_notify_6xxx(const u32 hkey,
3563 bool *send_acpi_ev,
3564 bool *ignore_acpi_ev)
3565 {
3566 bool known = true;
3567
3568 /* 0x6000-0x6FFF: thermal alarms/notices and keyboard events */
3569 *send_acpi_ev = true;
3570 *ignore_acpi_ev = false;
3571
3572 switch (hkey) {
3573 case TP_HKEY_EV_THM_TABLE_CHANGED:
3574 pr_info("EC reports that Thermal Table has changed\n");
3575 /* recommended action: do nothing, we don't have
3576 * Lenovo ATM information */
3577 return true;
3578 case TP_HKEY_EV_ALARM_BAT_HOT:
3579 pr_crit("THERMAL ALARM: battery is too hot!\n");
3580 /* recommended action: warn user through gui */
3581 break;
3582 case TP_HKEY_EV_ALARM_BAT_XHOT:
3583 pr_alert("THERMAL EMERGENCY: battery is extremely hot!\n");
3584 /* recommended action: immediate sleep/hibernate */
3585 break;
3586 case TP_HKEY_EV_ALARM_SENSOR_HOT:
3587 pr_crit("THERMAL ALARM: "
3588 "a sensor reports something is too hot!\n");
3589 /* recommended action: warn user through gui, that */
3590 /* some internal component is too hot */
3591 break;
3592 case TP_HKEY_EV_ALARM_SENSOR_XHOT:
3593 pr_alert("THERMAL EMERGENCY: "
3594 "a sensor reports something is extremely hot!\n");
3595 /* recommended action: immediate sleep/hibernate */
3596 break;
3597 case TP_HKEY_EV_AC_CHANGED:
3598 /* X120e, X121e, X220, X220i, X220t, X230, T420, T420s, W520:
3599 * AC status changed; can be triggered by plugging or
3600 * unplugging AC adapter, docking or undocking. */
3601
3602 /* fallthrough */
3603
3604 case TP_HKEY_EV_KEY_NUMLOCK:
3605 case TP_HKEY_EV_KEY_FN:
3606 /* key press events, we just ignore them as long as the EC
3607 * is still reporting them in the normal keyboard stream */
3608 *send_acpi_ev = false;
3609 *ignore_acpi_ev = true;
3610 return true;
3611
3612 default:
3613 pr_warn("unknown possible thermal alarm or keyboard event received\n");
3614 known = false;
3615 }
3616
3617 thermal_dump_all_sensors();
3618
3619 return known;
3620 }
3621
3622 static void hotkey_notify(struct ibm_struct *ibm, u32 event)
3623 {
3624 u32 hkey;
3625 bool send_acpi_ev;
3626 bool ignore_acpi_ev;
3627 bool known_ev;
3628
3629 if (event != 0x80) {
3630 pr_err("unknown HKEY notification event %d\n", event);
3631 /* forward it to userspace, maybe it knows how to handle it */
3632 acpi_bus_generate_netlink_event(
3633 ibm->acpi->device->pnp.device_class,
3634 dev_name(&ibm->acpi->device->dev),
3635 event, 0);
3636 return;
3637 }
3638
3639 while (1) {
3640 if (!acpi_evalf(hkey_handle, &hkey, "MHKP", "d")) {
3641 pr_err("failed to retrieve HKEY event\n");
3642 return;
3643 }
3644
3645 if (hkey == 0) {
3646 /* queue empty */
3647 return;
3648 }
3649
3650 send_acpi_ev = true;
3651 ignore_acpi_ev = false;
3652
3653 switch (hkey >> 12) {
3654 case 1:
3655 /* 0x1000-0x1FFF: key presses */
3656 known_ev = hotkey_notify_hotkey(hkey, &send_acpi_ev,
3657 &ignore_acpi_ev);
3658 break;
3659 case 2:
3660 /* 0x2000-0x2FFF: Wakeup reason */
3661 known_ev = hotkey_notify_wakeup(hkey, &send_acpi_ev,
3662 &ignore_acpi_ev);
3663 break;
3664 case 3:
3665 /* 0x3000-0x3FFF: bay-related wakeups */
3666 switch (hkey) {
3667 case TP_HKEY_EV_BAYEJ_ACK:
3668 hotkey_autosleep_ack = 1;
3669 pr_info("bay ejected\n");
3670 hotkey_wakeup_hotunplug_complete_notify_change();
3671 known_ev = true;
3672 break;
3673 case TP_HKEY_EV_OPTDRV_EJ:
3674 /* FIXME: kick libata if SATA link offline */
3675 known_ev = true;
3676 break;
3677 default:
3678 known_ev = false;
3679 }
3680 break;
3681 case 4:
3682 /* 0x4000-0x4FFF: dock-related events */
3683 known_ev = hotkey_notify_dockevent(hkey, &send_acpi_ev,
3684 &ignore_acpi_ev);
3685 break;
3686 case 5:
3687 /* 0x5000-0x5FFF: human interface helpers */
3688 known_ev = hotkey_notify_usrevent(hkey, &send_acpi_ev,
3689 &ignore_acpi_ev);
3690 break;
3691 case 6:
3692 /* 0x6000-0x6FFF: thermal alarms/notices and
3693 * keyboard events */
3694 known_ev = hotkey_notify_6xxx(hkey, &send_acpi_ev,
3695 &ignore_acpi_ev);
3696 break;
3697 case 7:
3698 /* 0x7000-0x7FFF: misc */
3699 if (tp_features.hotkey_wlsw &&
3700 hkey == TP_HKEY_EV_RFKILL_CHANGED) {
3701 tpacpi_send_radiosw_update();
3702 send_acpi_ev = 0;
3703 known_ev = true;
3704 break;
3705 }
3706 /* fallthrough to default */
3707 default:
3708 known_ev = false;
3709 }
3710 if (!known_ev) {
3711 pr_notice("unhandled HKEY event 0x%04x\n", hkey);
3712 pr_notice("please report the conditions when this "
3713 "event happened to %s\n", TPACPI_MAIL);
3714 }
3715
3716 /* netlink events */
3717 if (!ignore_acpi_ev && send_acpi_ev) {
3718 acpi_bus_generate_netlink_event(
3719 ibm->acpi->device->pnp.device_class,
3720 dev_name(&ibm->acpi->device->dev),
3721 event, hkey);
3722 }
3723 }
3724 }
3725
3726 static void hotkey_suspend(void)
3727 {
3728 /* Do these on suspend, we get the events on early resume! */
3729 hotkey_wakeup_reason = TP_ACPI_WAKEUP_NONE;
3730 hotkey_autosleep_ack = 0;
3731 }
3732
3733 static void hotkey_resume(void)
3734 {
3735 tpacpi_disable_brightness_delay();
3736
3737 if (hotkey_status_set(true) < 0 ||
3738 hotkey_mask_set(hotkey_acpi_mask) < 0)
3739 pr_err("error while attempting to reset the event "
3740 "firmware interface\n");
3741
3742 tpacpi_send_radiosw_update();
3743 hotkey_tablet_mode_notify_change();
3744 hotkey_wakeup_reason_notify_change();
3745 hotkey_wakeup_hotunplug_complete_notify_change();
3746 hotkey_poll_setup_safe(false);
3747 }
3748
3749 /* procfs -------------------------------------------------------------- */
3750 static int hotkey_read(struct seq_file *m)
3751 {
3752 int res, status;
3753
3754 if (!tp_features.hotkey) {
3755 seq_printf(m, "status:\t\tnot supported\n");
3756 return 0;
3757 }
3758
3759 if (mutex_lock_killable(&hotkey_mutex))
3760 return -ERESTARTSYS;
3761 res = hotkey_status_get(&status);
3762 if (!res)
3763 res = hotkey_mask_get();
3764 mutex_unlock(&hotkey_mutex);
3765 if (res)
3766 return res;
3767
3768 seq_printf(m, "status:\t\t%s\n", enabled(status, 0));
3769 if (hotkey_all_mask) {
3770 seq_printf(m, "mask:\t\t0x%08x\n", hotkey_user_mask);
3771 seq_printf(m, "commands:\tenable, disable, reset, <mask>\n");
3772 } else {
3773 seq_printf(m, "mask:\t\tnot supported\n");
3774 seq_printf(m, "commands:\tenable, disable, reset\n");
3775 }
3776
3777 return 0;
3778 }
3779
3780 static void hotkey_enabledisable_warn(bool enable)
3781 {
3782 tpacpi_log_usertask("procfs hotkey enable/disable");
3783 if (!WARN((tpacpi_lifecycle == TPACPI_LIFE_RUNNING || !enable),
3784 pr_fmt("hotkey enable/disable functionality has been "
3785 "removed from the driver. "
3786 "Hotkeys are always enabled.\n")))
3787 pr_err("Please remove the hotkey=enable module "
3788 "parameter, it is deprecated. "
3789 "Hotkeys are always enabled.\n");
3790 }
3791
3792 static int hotkey_write(char *buf)
3793 {
3794 int res;
3795 u32 mask;
3796 char *cmd;
3797
3798 if (!tp_features.hotkey)
3799 return -ENODEV;
3800
3801 if (mutex_lock_killable(&hotkey_mutex))
3802 return -ERESTARTSYS;
3803
3804 mask = hotkey_user_mask;
3805
3806 res = 0;
3807 while ((cmd = next_cmd(&buf))) {
3808 if (strlencmp(cmd, "enable") == 0) {
3809 hotkey_enabledisable_warn(1);
3810 } else if (strlencmp(cmd, "disable") == 0) {
3811 hotkey_enabledisable_warn(0);
3812 res = -EPERM;
3813 } else if (strlencmp(cmd, "reset") == 0) {
3814 mask = (hotkey_all_mask | hotkey_source_mask)
3815 & ~hotkey_reserved_mask;
3816 } else if (sscanf(cmd, "0x%x", &mask) == 1) {
3817 /* mask set */
3818 } else if (sscanf(cmd, "%x", &mask) == 1) {
3819 /* mask set */
3820 } else {
3821 res = -EINVAL;
3822 goto errexit;
3823 }
3824 }
3825
3826 if (!res) {
3827 tpacpi_disclose_usertask("procfs hotkey",
3828 "set mask to 0x%08x\n", mask);
3829 res = hotkey_user_mask_set(mask);
3830 }
3831
3832 errexit:
3833 mutex_unlock(&hotkey_mutex);
3834 return res;
3835 }
3836
3837 static const struct acpi_device_id ibm_htk_device_ids[] = {
3838 {TPACPI_ACPI_IBM_HKEY_HID, 0},
3839 {TPACPI_ACPI_LENOVO_HKEY_HID, 0},
3840 {"", 0},
3841 };
3842
3843 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver = {
3844 .hid = ibm_htk_device_ids,
3845 .notify = hotkey_notify,
3846 .handle = &hkey_handle,
3847 .type = ACPI_DEVICE_NOTIFY,
3848 };
3849
3850 static struct ibm_struct hotkey_driver_data = {
3851 .name = "hotkey",
3852 .read = hotkey_read,
3853 .write = hotkey_write,
3854 .exit = hotkey_exit,
3855 .resume = hotkey_resume,
3856 .suspend = hotkey_suspend,
3857 .acpi = &ibm_hotkey_acpidriver,
3858 };
3859
3860 /*************************************************************************
3861 * Bluetooth subdriver
3862 */
3863
3864 enum {
3865 /* ACPI GBDC/SBDC bits */
3866 TP_ACPI_BLUETOOTH_HWPRESENT = 0x01, /* Bluetooth hw available */
3867 TP_ACPI_BLUETOOTH_RADIOSSW = 0x02, /* Bluetooth radio enabled */
3868 TP_ACPI_BLUETOOTH_RESUMECTRL = 0x04, /* Bluetooth state at resume:
3869 0 = disable, 1 = enable */
3870 };
3871
3872 enum {
3873 /* ACPI \BLTH commands */
3874 TP_ACPI_BLTH_GET_ULTRAPORT_ID = 0x00, /* Get Ultraport BT ID */
3875 TP_ACPI_BLTH_GET_PWR_ON_RESUME = 0x01, /* Get power-on-resume state */
3876 TP_ACPI_BLTH_PWR_ON_ON_RESUME = 0x02, /* Resume powered on */
3877 TP_ACPI_BLTH_PWR_OFF_ON_RESUME = 0x03, /* Resume powered off */
3878 TP_ACPI_BLTH_SAVE_STATE = 0x05, /* Save state for S4/S5 */
3879 };
3880
3881 #define TPACPI_RFK_BLUETOOTH_SW_NAME "tpacpi_bluetooth_sw"
3882
3883 static int bluetooth_get_status(void)
3884 {
3885 int status;
3886
3887 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3888 if (dbg_bluetoothemul)
3889 return (tpacpi_bluetooth_emulstate) ?
3890 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
3891 #endif
3892
3893 if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
3894 return -EIO;
3895
3896 return ((status & TP_ACPI_BLUETOOTH_RADIOSSW) != 0) ?
3897 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
3898 }
3899
3900 static int bluetooth_set_status(enum tpacpi_rfkill_state state)
3901 {
3902 int status;
3903
3904 vdbg_printk(TPACPI_DBG_RFKILL,
3905 "will attempt to %s bluetooth\n",
3906 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable");
3907
3908 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3909 if (dbg_bluetoothemul) {
3910 tpacpi_bluetooth_emulstate = (state == TPACPI_RFK_RADIO_ON);
3911 return 0;
3912 }
3913 #endif
3914
3915 if (state == TPACPI_RFK_RADIO_ON)
3916 status = TP_ACPI_BLUETOOTH_RADIOSSW
3917 | TP_ACPI_BLUETOOTH_RESUMECTRL;
3918 else
3919 status = 0;
3920
3921 if (!acpi_evalf(hkey_handle, NULL, "SBDC", "vd", status))
3922 return -EIO;
3923
3924 return 0;
3925 }
3926
3927 /* sysfs bluetooth enable ---------------------------------------------- */
3928 static ssize_t bluetooth_enable_show(struct device *dev,
3929 struct device_attribute *attr,
3930 char *buf)
3931 {
3932 return tpacpi_rfk_sysfs_enable_show(TPACPI_RFK_BLUETOOTH_SW_ID,
3933 attr, buf);
3934 }
3935
3936 static ssize_t bluetooth_enable_store(struct device *dev,
3937 struct device_attribute *attr,
3938 const char *buf, size_t count)
3939 {
3940 return tpacpi_rfk_sysfs_enable_store(TPACPI_RFK_BLUETOOTH_SW_ID,
3941 attr, buf, count);
3942 }
3943
3944 static struct device_attribute dev_attr_bluetooth_enable =
3945 __ATTR(bluetooth_enable, S_IWUSR | S_IRUGO,
3946 bluetooth_enable_show, bluetooth_enable_store);
3947
3948 /* --------------------------------------------------------------------- */
3949
3950 static struct attribute *bluetooth_attributes[] = {
3951 &dev_attr_bluetooth_enable.attr,
3952 NULL
3953 };
3954
3955 static const struct attribute_group bluetooth_attr_group = {
3956 .attrs = bluetooth_attributes,
3957 };
3958
3959 static const struct tpacpi_rfk_ops bluetooth_tprfk_ops = {
3960 .get_status = bluetooth_get_status,
3961 .set_status = bluetooth_set_status,
3962 };
3963
3964 static void bluetooth_shutdown(void)
3965 {
3966 /* Order firmware to save current state to NVRAM */
3967 if (!acpi_evalf(NULL, NULL, "\\BLTH", "vd",
3968 TP_ACPI_BLTH_SAVE_STATE))
3969 pr_notice("failed to save bluetooth state to NVRAM\n");
3970 else
3971 vdbg_printk(TPACPI_DBG_RFKILL,
3972 "bluetooth state saved to NVRAM\n");
3973 }
3974
3975 static void bluetooth_exit(void)
3976 {
3977 sysfs_remove_group(&tpacpi_pdev->dev.kobj,
3978 &bluetooth_attr_group);
3979
3980 tpacpi_destroy_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID);
3981
3982 bluetooth_shutdown();
3983 }
3984
3985 static int __init bluetooth_init(struct ibm_init_struct *iibm)
3986 {
3987 int res;
3988 int status = 0;
3989
3990 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
3991 "initializing bluetooth subdriver\n");
3992
3993 TPACPI_ACPIHANDLE_INIT(hkey);
3994
3995 /* bluetooth not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
3996 G4x, R30, R31, R40e, R50e, T20-22, X20-21 */
3997 tp_features.bluetooth = hkey_handle &&
3998 acpi_evalf(hkey_handle, &status, "GBDC", "qd");
3999
4000 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4001 "bluetooth is %s, status 0x%02x\n",
4002 str_supported(tp_features.bluetooth),
4003 status);
4004
4005 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4006 if (dbg_bluetoothemul) {
4007 tp_features.bluetooth = 1;
4008 pr_info("bluetooth switch emulation enabled\n");
4009 } else
4010 #endif
4011 if (tp_features.bluetooth &&
4012 !(status & TP_ACPI_BLUETOOTH_HWPRESENT)) {
4013 /* no bluetooth hardware present in system */
4014 tp_features.bluetooth = 0;
4015 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4016 "bluetooth hardware not installed\n");
4017 }
4018
4019 if (!tp_features.bluetooth)
4020 return 1;
4021
4022 res = tpacpi_new_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID,
4023 &bluetooth_tprfk_ops,
4024 RFKILL_TYPE_BLUETOOTH,
4025 TPACPI_RFK_BLUETOOTH_SW_NAME,
4026 true);
4027 if (res)
4028 return res;
4029
4030 res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
4031 &bluetooth_attr_group);
4032 if (res) {
4033 tpacpi_destroy_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID);
4034 return res;
4035 }
4036
4037 return 0;
4038 }
4039
4040 /* procfs -------------------------------------------------------------- */
4041 static int bluetooth_read(struct seq_file *m)
4042 {
4043 return tpacpi_rfk_procfs_read(TPACPI_RFK_BLUETOOTH_SW_ID, m);
4044 }
4045
4046 static int bluetooth_write(char *buf)
4047 {
4048 return tpacpi_rfk_procfs_write(TPACPI_RFK_BLUETOOTH_SW_ID, buf);
4049 }
4050
4051 static struct ibm_struct bluetooth_driver_data = {
4052 .name = "bluetooth",
4053 .read = bluetooth_read,
4054 .write = bluetooth_write,
4055 .exit = bluetooth_exit,
4056 .shutdown = bluetooth_shutdown,
4057 };
4058
4059 /*************************************************************************
4060 * Wan subdriver
4061 */
4062
4063 enum {
4064 /* ACPI GWAN/SWAN bits */
4065 TP_ACPI_WANCARD_HWPRESENT = 0x01, /* Wan hw available */
4066 TP_ACPI_WANCARD_RADIOSSW = 0x02, /* Wan radio enabled */
4067 TP_ACPI_WANCARD_RESUMECTRL = 0x04, /* Wan state at resume:
4068 0 = disable, 1 = enable */
4069 };
4070
4071 #define TPACPI_RFK_WWAN_SW_NAME "tpacpi_wwan_sw"
4072
4073 static int wan_get_status(void)
4074 {
4075 int status;
4076
4077 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4078 if (dbg_wwanemul)
4079 return (tpacpi_wwan_emulstate) ?
4080 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4081 #endif
4082
4083 if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
4084 return -EIO;
4085
4086 return ((status & TP_ACPI_WANCARD_RADIOSSW) != 0) ?
4087 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4088 }
4089
4090 static int wan_set_status(enum tpacpi_rfkill_state state)
4091 {
4092 int status;
4093
4094 vdbg_printk(TPACPI_DBG_RFKILL,
4095 "will attempt to %s wwan\n",
4096 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable");
4097
4098 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4099 if (dbg_wwanemul) {
4100 tpacpi_wwan_emulstate = (state == TPACPI_RFK_RADIO_ON);
4101 return 0;
4102 }
4103 #endif
4104
4105 if (state == TPACPI_RFK_RADIO_ON)
4106 status = TP_ACPI_WANCARD_RADIOSSW
4107 | TP_ACPI_WANCARD_RESUMECTRL;
4108 else
4109 status = 0;
4110
4111 if (!acpi_evalf(hkey_handle, NULL, "SWAN", "vd", status))
4112 return -EIO;
4113
4114 return 0;
4115 }
4116
4117 /* sysfs wan enable ---------------------------------------------------- */
4118 static ssize_t wan_enable_show(struct device *dev,
4119 struct device_attribute *attr,
4120 char *buf)
4121 {
4122 return tpacpi_rfk_sysfs_enable_show(TPACPI_RFK_WWAN_SW_ID,
4123 attr, buf);
4124 }
4125
4126 static ssize_t wan_enable_store(struct device *dev,
4127 struct device_attribute *attr,
4128 const char *buf, size_t count)
4129 {
4130 return tpacpi_rfk_sysfs_enable_store(TPACPI_RFK_WWAN_SW_ID,
4131 attr, buf, count);
4132 }
4133
4134 static struct device_attribute dev_attr_wan_enable =
4135 __ATTR(wwan_enable, S_IWUSR | S_IRUGO,
4136 wan_enable_show, wan_enable_store);
4137
4138 /* --------------------------------------------------------------------- */
4139
4140 static struct attribute *wan_attributes[] = {
4141 &dev_attr_wan_enable.attr,
4142 NULL
4143 };
4144
4145 static const struct attribute_group wan_attr_group = {
4146 .attrs = wan_attributes,
4147 };
4148
4149 static const struct tpacpi_rfk_ops wan_tprfk_ops = {
4150 .get_status = wan_get_status,
4151 .set_status = wan_set_status,
4152 };
4153
4154 static void wan_shutdown(void)
4155 {
4156 /* Order firmware to save current state to NVRAM */
4157 if (!acpi_evalf(NULL, NULL, "\\WGSV", "vd",
4158 TP_ACPI_WGSV_SAVE_STATE))
4159 pr_notice("failed to save WWAN state to NVRAM\n");
4160 else
4161 vdbg_printk(TPACPI_DBG_RFKILL,
4162 "WWAN state saved to NVRAM\n");
4163 }
4164
4165 static void wan_exit(void)
4166 {
4167 sysfs_remove_group(&tpacpi_pdev->dev.kobj,
4168 &wan_attr_group);
4169
4170 tpacpi_destroy_rfkill(TPACPI_RFK_WWAN_SW_ID);
4171
4172 wan_shutdown();
4173 }
4174
4175 static int __init wan_init(struct ibm_init_struct *iibm)
4176 {
4177 int res;
4178 int status = 0;
4179
4180 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4181 "initializing wan subdriver\n");
4182
4183 TPACPI_ACPIHANDLE_INIT(hkey);
4184
4185 tp_features.wan = hkey_handle &&
4186 acpi_evalf(hkey_handle, &status, "GWAN", "qd");
4187
4188 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4189 "wan is %s, status 0x%02x\n",
4190 str_supported(tp_features.wan),
4191 status);
4192
4193 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4194 if (dbg_wwanemul) {
4195 tp_features.wan = 1;
4196 pr_info("wwan switch emulation enabled\n");
4197 } else
4198 #endif
4199 if (tp_features.wan &&
4200 !(status & TP_ACPI_WANCARD_HWPRESENT)) {
4201 /* no wan hardware present in system */
4202 tp_features.wan = 0;
4203 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4204 "wan hardware not installed\n");
4205 }
4206
4207 if (!tp_features.wan)
4208 return 1;
4209
4210 res = tpacpi_new_rfkill(TPACPI_RFK_WWAN_SW_ID,
4211 &wan_tprfk_ops,
4212 RFKILL_TYPE_WWAN,
4213 TPACPI_RFK_WWAN_SW_NAME,
4214 true);
4215 if (res)
4216 return res;
4217
4218 res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
4219 &wan_attr_group);
4220
4221 if (res) {
4222 tpacpi_destroy_rfkill(TPACPI_RFK_WWAN_SW_ID);
4223 return res;
4224 }
4225
4226 return 0;
4227 }
4228
4229 /* procfs -------------------------------------------------------------- */
4230 static int wan_read(struct seq_file *m)
4231 {
4232 return tpacpi_rfk_procfs_read(TPACPI_RFK_WWAN_SW_ID, m);
4233 }
4234
4235 static int wan_write(char *buf)
4236 {
4237 return tpacpi_rfk_procfs_write(TPACPI_RFK_WWAN_SW_ID, buf);
4238 }
4239
4240 static struct ibm_struct wan_driver_data = {
4241 .name = "wan",
4242 .read = wan_read,
4243 .write = wan_write,
4244 .exit = wan_exit,
4245 .shutdown = wan_shutdown,
4246 };
4247
4248 /*************************************************************************
4249 * UWB subdriver
4250 */
4251
4252 enum {
4253 /* ACPI GUWB/SUWB bits */
4254 TP_ACPI_UWB_HWPRESENT = 0x01, /* UWB hw available */
4255 TP_ACPI_UWB_RADIOSSW = 0x02, /* UWB radio enabled */
4256 };
4257
4258 #define TPACPI_RFK_UWB_SW_NAME "tpacpi_uwb_sw"
4259
4260 static int uwb_get_status(void)
4261 {
4262 int status;
4263
4264 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4265 if (dbg_uwbemul)
4266 return (tpacpi_uwb_emulstate) ?
4267 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4268 #endif
4269
4270 if (!acpi_evalf(hkey_handle, &status, "GUWB", "d"))
4271 return -EIO;
4272
4273 return ((status & TP_ACPI_UWB_RADIOSSW) != 0) ?
4274 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4275 }
4276
4277 static int uwb_set_status(enum tpacpi_rfkill_state state)
4278 {
4279 int status;
4280
4281 vdbg_printk(TPACPI_DBG_RFKILL,
4282 "will attempt to %s UWB\n",
4283 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable");
4284
4285 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4286 if (dbg_uwbemul) {
4287 tpacpi_uwb_emulstate = (state == TPACPI_RFK_RADIO_ON);
4288 return 0;
4289 }
4290 #endif
4291
4292 if (state == TPACPI_RFK_RADIO_ON)
4293 status = TP_ACPI_UWB_RADIOSSW;
4294 else
4295 status = 0;
4296
4297 if (!acpi_evalf(hkey_handle, NULL, "SUWB", "vd", status))
4298 return -EIO;
4299
4300 return 0;
4301 }
4302
4303 /* --------------------------------------------------------------------- */
4304
4305 static const struct tpacpi_rfk_ops uwb_tprfk_ops = {
4306 .get_status = uwb_get_status,
4307 .set_status = uwb_set_status,
4308 };
4309
4310 static void uwb_exit(void)
4311 {
4312 tpacpi_destroy_rfkill(TPACPI_RFK_UWB_SW_ID);
4313 }
4314
4315 static int __init uwb_init(struct ibm_init_struct *iibm)
4316 {
4317 int res;
4318 int status = 0;
4319
4320 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4321 "initializing uwb subdriver\n");
4322
4323 TPACPI_ACPIHANDLE_INIT(hkey);
4324
4325 tp_features.uwb = hkey_handle &&
4326 acpi_evalf(hkey_handle, &status, "GUWB", "qd");
4327
4328 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4329 "uwb is %s, status 0x%02x\n",
4330 str_supported(tp_features.uwb),
4331 status);
4332
4333 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4334 if (dbg_uwbemul) {
4335 tp_features.uwb = 1;
4336 pr_info("uwb switch emulation enabled\n");
4337 } else
4338 #endif
4339 if (tp_features.uwb &&
4340 !(status & TP_ACPI_UWB_HWPRESENT)) {
4341 /* no uwb hardware present in system */
4342 tp_features.uwb = 0;
4343 dbg_printk(TPACPI_DBG_INIT,
4344 "uwb hardware not installed\n");
4345 }
4346
4347 if (!tp_features.uwb)
4348 return 1;
4349
4350 res = tpacpi_new_rfkill(TPACPI_RFK_UWB_SW_ID,
4351 &uwb_tprfk_ops,
4352 RFKILL_TYPE_UWB,
4353 TPACPI_RFK_UWB_SW_NAME,
4354 false);
4355 return res;
4356 }
4357
4358 static struct ibm_struct uwb_driver_data = {
4359 .name = "uwb",
4360 .exit = uwb_exit,
4361 .flags.experimental = 1,
4362 };
4363
4364 /*************************************************************************
4365 * Video subdriver
4366 */
4367
4368 #ifdef CONFIG_THINKPAD_ACPI_VIDEO
4369
4370 enum video_access_mode {
4371 TPACPI_VIDEO_NONE = 0,
4372 TPACPI_VIDEO_570, /* 570 */
4373 TPACPI_VIDEO_770, /* 600e/x, 770e, 770x */
4374 TPACPI_VIDEO_NEW, /* all others */
4375 };
4376
4377 enum { /* video status flags, based on VIDEO_570 */
4378 TP_ACPI_VIDEO_S_LCD = 0x01, /* LCD output enabled */
4379 TP_ACPI_VIDEO_S_CRT = 0x02, /* CRT output enabled */
4380 TP_ACPI_VIDEO_S_DVI = 0x08, /* DVI output enabled */
4381 };
4382
4383 enum { /* TPACPI_VIDEO_570 constants */
4384 TP_ACPI_VIDEO_570_PHSCMD = 0x87, /* unknown magic constant :( */
4385 TP_ACPI_VIDEO_570_PHSMASK = 0x03, /* PHS bits that map to
4386 * video_status_flags */
4387 TP_ACPI_VIDEO_570_PHS2CMD = 0x8b, /* unknown magic constant :( */
4388 TP_ACPI_VIDEO_570_PHS2SET = 0x80, /* unknown magic constant :( */
4389 };
4390
4391 static enum video_access_mode video_supported;
4392 static int video_orig_autosw;
4393
4394 static int video_autosw_get(void);
4395 static int video_autosw_set(int enable);
4396
4397 TPACPI_HANDLE(vid, root,
4398 "\\_SB.PCI.AGP.VGA", /* 570 */
4399 "\\_SB.PCI0.AGP0.VID0", /* 600e/x, 770x */
4400 "\\_SB.PCI0.VID0", /* 770e */
4401 "\\_SB.PCI0.VID", /* A21e, G4x, R50e, X30, X40 */
4402 "\\_SB.PCI0.AGP.VGA", /* X100e and a few others */
4403 "\\_SB.PCI0.AGP.VID", /* all others */
4404 ); /* R30, R31 */
4405
4406 TPACPI_HANDLE(vid2, root, "\\_SB.PCI0.AGPB.VID"); /* G41 */
4407
4408 static int __init video_init(struct ibm_init_struct *iibm)
4409 {
4410 int ivga;
4411
4412 vdbg_printk(TPACPI_DBG_INIT, "initializing video subdriver\n");
4413
4414 TPACPI_ACPIHANDLE_INIT(vid);
4415 if (tpacpi_is_ibm())
4416 TPACPI_ACPIHANDLE_INIT(vid2);
4417
4418 if (vid2_handle && acpi_evalf(NULL, &ivga, "\\IVGA", "d") && ivga)
4419 /* G41, assume IVGA doesn't change */
4420 vid_handle = vid2_handle;
4421
4422 if (!vid_handle)
4423 /* video switching not supported on R30, R31 */
4424 video_supported = TPACPI_VIDEO_NONE;
4425 else if (tpacpi_is_ibm() &&
4426 acpi_evalf(vid_handle, &video_orig_autosw, "SWIT", "qd"))
4427 /* 570 */
4428 video_supported = TPACPI_VIDEO_570;
4429 else if (tpacpi_is_ibm() &&
4430 acpi_evalf(vid_handle, &video_orig_autosw, "^VADL", "qd"))
4431 /* 600e/x, 770e, 770x */
4432 video_supported = TPACPI_VIDEO_770;
4433 else
4434 /* all others */
4435 video_supported = TPACPI_VIDEO_NEW;
4436
4437 vdbg_printk(TPACPI_DBG_INIT, "video is %s, mode %d\n",
4438 str_supported(video_supported != TPACPI_VIDEO_NONE),
4439 video_supported);
4440
4441 return (video_supported != TPACPI_VIDEO_NONE)? 0 : 1;
4442 }
4443
4444 static void video_exit(void)
4445 {
4446 dbg_printk(TPACPI_DBG_EXIT,
4447 "restoring original video autoswitch mode\n");
4448 if (video_autosw_set(video_orig_autosw))
4449 pr_err("error while trying to restore original "
4450 "video autoswitch mode\n");
4451 }
4452
4453 static int video_outputsw_get(void)
4454 {
4455 int status = 0;
4456 int i;
4457
4458 switch (video_supported) {
4459 case TPACPI_VIDEO_570:
4460 if (!acpi_evalf(NULL, &i, "\\_SB.PHS", "dd",
4461 TP_ACPI_VIDEO_570_PHSCMD))
4462 return -EIO;
4463 status = i & TP_ACPI_VIDEO_570_PHSMASK;
4464 break;
4465 case TPACPI_VIDEO_770:
4466 if (!acpi_evalf(NULL, &i, "\\VCDL", "d"))
4467 return -EIO;
4468 if (i)
4469 status |= TP_ACPI_VIDEO_S_LCD;
4470 if (!acpi_evalf(NULL, &i, "\\VCDC", "d"))
4471 return -EIO;
4472 if (i)
4473 status |= TP_ACPI_VIDEO_S_CRT;
4474 break;
4475 case TPACPI_VIDEO_NEW:
4476 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 1) ||
4477 !acpi_evalf(NULL, &i, "\\VCDC", "d"))
4478 return -EIO;
4479 if (i)
4480 status |= TP_ACPI_VIDEO_S_CRT;
4481
4482 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0) ||
4483 !acpi_evalf(NULL, &i, "\\VCDL", "d"))
4484 return -EIO;
4485 if (i)
4486 status |= TP_ACPI_VIDEO_S_LCD;
4487 if (!acpi_evalf(NULL, &i, "\\VCDD", "d"))
4488 return -EIO;
4489 if (i)
4490 status |= TP_ACPI_VIDEO_S_DVI;
4491 break;
4492 default:
4493 return -ENOSYS;
4494 }
4495
4496 return status;
4497 }
4498
4499 static int video_outputsw_set(int status)
4500 {
4501 int autosw;
4502 int res = 0;
4503
4504 switch (video_supported) {
4505 case TPACPI_VIDEO_570:
4506 res = acpi_evalf(NULL, NULL,
4507 "\\_SB.PHS2", "vdd",
4508 TP_ACPI_VIDEO_570_PHS2CMD,
4509 status | TP_ACPI_VIDEO_570_PHS2SET);
4510 break;
4511 case TPACPI_VIDEO_770:
4512 autosw = video_autosw_get();
4513 if (autosw < 0)
4514 return autosw;
4515
4516 res = video_autosw_set(1);
4517 if (res)
4518 return res;
4519 res = acpi_evalf(vid_handle, NULL,
4520 "ASWT", "vdd", status * 0x100, 0);
4521 if (!autosw && video_autosw_set(autosw)) {
4522 pr_err("video auto-switch left enabled due to error\n");
4523 return -EIO;
4524 }
4525 break;
4526 case TPACPI_VIDEO_NEW:
4527 res = acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0x80) &&
4528 acpi_evalf(NULL, NULL, "\\VSDS", "vdd", status, 1);
4529 break;
4530 default:
4531 return -ENOSYS;
4532 }
4533
4534 return (res)? 0 : -EIO;
4535 }
4536
4537 static int video_autosw_get(void)
4538 {
4539 int autosw = 0;
4540
4541 switch (video_supported) {
4542 case TPACPI_VIDEO_570:
4543 if (!acpi_evalf(vid_handle, &autosw, "SWIT", "d"))
4544 return -EIO;
4545 break;
4546 case TPACPI_VIDEO_770:
4547 case TPACPI_VIDEO_NEW:
4548 if (!acpi_evalf(vid_handle, &autosw, "^VDEE", "d"))
4549 return -EIO;
4550 break;
4551 default:
4552 return -ENOSYS;
4553 }
4554
4555 return autosw & 1;
4556 }
4557
4558 static int video_autosw_set(int enable)
4559 {
4560 if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", (enable)? 1 : 0))
4561 return -EIO;
4562 return 0;
4563 }
4564
4565 static int video_outputsw_cycle(void)
4566 {
4567 int autosw = video_autosw_get();
4568 int res;
4569
4570 if (autosw < 0)
4571 return autosw;
4572
4573 switch (video_supported) {
4574 case TPACPI_VIDEO_570:
4575 res = video_autosw_set(1);
4576 if (res)
4577 return res;
4578 res = acpi_evalf(ec_handle, NULL, "_Q16", "v");
4579 break;
4580 case TPACPI_VIDEO_770:
4581 case TPACPI_VIDEO_NEW:
4582 res = video_autosw_set(1);
4583 if (res)
4584 return res;
4585 res = acpi_evalf(vid_handle, NULL, "VSWT", "v");
4586 break;
4587 default:
4588 return -ENOSYS;
4589 }
4590 if (!autosw && video_autosw_set(autosw)) {
4591 pr_err("video auto-switch left enabled due to error\n");
4592 return -EIO;
4593 }
4594
4595 return (res)? 0 : -EIO;
4596 }
4597
4598 static int video_expand_toggle(void)
4599 {
4600 switch (video_supported) {
4601 case TPACPI_VIDEO_570:
4602 return acpi_evalf(ec_handle, NULL, "_Q17", "v")?
4603 0 : -EIO;
4604 case TPACPI_VIDEO_770:
4605 return acpi_evalf(vid_handle, NULL, "VEXP", "v")?
4606 0 : -EIO;
4607 case TPACPI_VIDEO_NEW:
4608 return acpi_evalf(NULL, NULL, "\\VEXP", "v")?
4609 0 : -EIO;
4610 default:
4611 return -ENOSYS;
4612 }
4613 /* not reached */
4614 }
4615
4616 static int video_read(struct seq_file *m)
4617 {
4618 int status, autosw;
4619
4620 if (video_supported == TPACPI_VIDEO_NONE) {
4621 seq_printf(m, "status:\t\tnot supported\n");
4622 return 0;
4623 }
4624
4625 /* Even reads can crash X.org, so... */
4626 if (!capable(CAP_SYS_ADMIN))
4627 return -EPERM;
4628
4629 status = video_outputsw_get();
4630 if (status < 0)
4631 return status;
4632
4633 autosw = video_autosw_get();
4634 if (autosw < 0)
4635 return autosw;
4636
4637 seq_printf(m, "status:\t\tsupported\n");
4638 seq_printf(m, "lcd:\t\t%s\n", enabled(status, 0));
4639 seq_printf(m, "crt:\t\t%s\n", enabled(status, 1));
4640 if (video_supported == TPACPI_VIDEO_NEW)
4641 seq_printf(m, "dvi:\t\t%s\n", enabled(status, 3));
4642 seq_printf(m, "auto:\t\t%s\n", enabled(autosw, 0));
4643 seq_printf(m, "commands:\tlcd_enable, lcd_disable\n");
4644 seq_printf(m, "commands:\tcrt_enable, crt_disable\n");
4645 if (video_supported == TPACPI_VIDEO_NEW)
4646 seq_printf(m, "commands:\tdvi_enable, dvi_disable\n");
4647 seq_printf(m, "commands:\tauto_enable, auto_disable\n");
4648 seq_printf(m, "commands:\tvideo_switch, expand_toggle\n");
4649
4650 return 0;
4651 }
4652
4653 static int video_write(char *buf)
4654 {
4655 char *cmd;
4656 int enable, disable, status;
4657 int res;
4658
4659 if (video_supported == TPACPI_VIDEO_NONE)
4660 return -ENODEV;
4661
4662 /* Even reads can crash X.org, let alone writes... */
4663 if (!capable(CAP_SYS_ADMIN))
4664 return -EPERM;
4665
4666 enable = 0;
4667 disable = 0;
4668
4669 while ((cmd = next_cmd(&buf))) {
4670 if (strlencmp(cmd, "lcd_enable") == 0) {
4671 enable |= TP_ACPI_VIDEO_S_LCD;
4672 } else if (strlencmp(cmd, "lcd_disable") == 0) {
4673 disable |= TP_ACPI_VIDEO_S_LCD;
4674 } else if (strlencmp(cmd, "crt_enable") == 0) {
4675 enable |= TP_ACPI_VIDEO_S_CRT;
4676 } else if (strlencmp(cmd, "crt_disable") == 0) {
4677 disable |= TP_ACPI_VIDEO_S_CRT;
4678 } else if (video_supported == TPACPI_VIDEO_NEW &&
4679 strlencmp(cmd, "dvi_enable") == 0) {
4680 enable |= TP_ACPI_VIDEO_S_DVI;
4681 } else if (video_supported == TPACPI_VIDEO_NEW &&
4682 strlencmp(cmd, "dvi_disable") == 0) {
4683 disable |= TP_ACPI_VIDEO_S_DVI;
4684 } else if (strlencmp(cmd, "auto_enable") == 0) {
4685 res = video_autosw_set(1);
4686 if (res)
4687 return res;
4688 } else if (strlencmp(cmd, "auto_disable") == 0) {
4689 res = video_autosw_set(0);
4690 if (res)
4691 return res;
4692 } else if (strlencmp(cmd, "video_switch") == 0) {
4693 res = video_outputsw_cycle();
4694 if (res)
4695 return res;
4696 } else if (strlencmp(cmd, "expand_toggle") == 0) {
4697 res = video_expand_toggle();
4698 if (res)
4699 return res;
4700 } else
4701 return -EINVAL;
4702 }
4703
4704 if (enable || disable) {
4705 status = video_outputsw_get();
4706 if (status < 0)
4707 return status;
4708 res = video_outputsw_set((status & ~disable) | enable);
4709 if (res)
4710 return res;
4711 }
4712
4713 return 0;
4714 }
4715
4716 static struct ibm_struct video_driver_data = {
4717 .name = "video",
4718 .read = video_read,
4719 .write = video_write,
4720 .exit = video_exit,
4721 };
4722
4723 #endif /* CONFIG_THINKPAD_ACPI_VIDEO */
4724
4725 /*************************************************************************
4726 * Light (thinklight) subdriver
4727 */
4728
4729 TPACPI_HANDLE(lght, root, "\\LGHT"); /* A21e, A2xm/p, T20-22, X20-21 */
4730 TPACPI_HANDLE(ledb, ec, "LEDB"); /* G4x */
4731
4732 static int light_get_status(void)
4733 {
4734 int status = 0;
4735
4736 if (tp_features.light_status) {
4737 if (!acpi_evalf(ec_handle, &status, "KBLT", "d"))
4738 return -EIO;
4739 return (!!status);
4740 }
4741
4742 return -ENXIO;
4743 }
4744
4745 static int light_set_status(int status)
4746 {
4747 int rc;
4748
4749 if (tp_features.light) {
4750 if (cmos_handle) {
4751 rc = acpi_evalf(cmos_handle, NULL, NULL, "vd",
4752 (status)?
4753 TP_CMOS_THINKLIGHT_ON :
4754 TP_CMOS_THINKLIGHT_OFF);
4755 } else {
4756 rc = acpi_evalf(lght_handle, NULL, NULL, "vd",
4757 (status)? 1 : 0);
4758 }
4759 return (rc)? 0 : -EIO;
4760 }
4761
4762 return -ENXIO;
4763 }
4764
4765 static void light_set_status_worker(struct work_struct *work)
4766 {
4767 struct tpacpi_led_classdev *data =
4768 container_of(work, struct tpacpi_led_classdev, work);
4769
4770 if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING))
4771 light_set_status((data->new_state != TPACPI_LED_OFF));
4772 }
4773
4774 static void light_sysfs_set(struct led_classdev *led_cdev,
4775 enum led_brightness brightness)
4776 {
4777 struct tpacpi_led_classdev *data =
4778 container_of(led_cdev,
4779 struct tpacpi_led_classdev,
4780 led_classdev);
4781 data->new_state = (brightness != LED_OFF) ?
4782 TPACPI_LED_ON : TPACPI_LED_OFF;
4783 queue_work(tpacpi_wq, &data->work);
4784 }
4785
4786 static enum led_brightness light_sysfs_get(struct led_classdev *led_cdev)
4787 {
4788 return (light_get_status() == 1)? LED_FULL : LED_OFF;
4789 }
4790
4791 static struct tpacpi_led_classdev tpacpi_led_thinklight = {
4792 .led_classdev = {
4793 .name = "tpacpi::thinklight",
4794 .brightness_set = &light_sysfs_set,
4795 .brightness_get = &light_sysfs_get,
4796 }
4797 };
4798
4799 static int __init light_init(struct ibm_init_struct *iibm)
4800 {
4801 int rc;
4802
4803 vdbg_printk(TPACPI_DBG_INIT, "initializing light subdriver\n");
4804
4805 if (tpacpi_is_ibm()) {
4806 TPACPI_ACPIHANDLE_INIT(ledb);
4807 TPACPI_ACPIHANDLE_INIT(lght);
4808 }
4809 TPACPI_ACPIHANDLE_INIT(cmos);
4810 INIT_WORK(&tpacpi_led_thinklight.work, light_set_status_worker);
4811
4812 /* light not supported on 570, 600e/x, 770e, 770x, G4x, R30, R31 */
4813 tp_features.light = (cmos_handle || lght_handle) && !ledb_handle;
4814
4815 if (tp_features.light)
4816 /* light status not supported on
4817 570, 600e/x, 770e, 770x, G4x, R30, R31, R32, X20 */
4818 tp_features.light_status =
4819 acpi_evalf(ec_handle, NULL, "KBLT", "qv");
4820
4821 vdbg_printk(TPACPI_DBG_INIT, "light is %s, light status is %s\n",
4822 str_supported(tp_features.light),
4823 str_supported(tp_features.light_status));
4824
4825 if (!tp_features.light)
4826 return 1;
4827
4828 rc = led_classdev_register(&tpacpi_pdev->dev,
4829 &tpacpi_led_thinklight.led_classdev);
4830
4831 if (rc < 0) {
4832 tp_features.light = 0;
4833 tp_features.light_status = 0;
4834 } else {
4835 rc = 0;
4836 }
4837
4838 return rc;
4839 }
4840
4841 static void light_exit(void)
4842 {
4843 led_classdev_unregister(&tpacpi_led_thinklight.led_classdev);
4844 flush_workqueue(tpacpi_wq);
4845 }
4846
4847 static int light_read(struct seq_file *m)
4848 {
4849 int status;
4850
4851 if (!tp_features.light) {
4852 seq_printf(m, "status:\t\tnot supported\n");
4853 } else if (!tp_features.light_status) {
4854 seq_printf(m, "status:\t\tunknown\n");
4855 seq_printf(m, "commands:\ton, off\n");
4856 } else {
4857 status = light_get_status();
4858 if (status < 0)
4859 return status;
4860 seq_printf(m, "status:\t\t%s\n", onoff(status, 0));
4861 seq_printf(m, "commands:\ton, off\n");
4862 }
4863
4864 return 0;
4865 }
4866
4867 static int light_write(char *buf)
4868 {
4869 char *cmd;
4870 int newstatus = 0;
4871
4872 if (!tp_features.light)
4873 return -ENODEV;
4874
4875 while ((cmd = next_cmd(&buf))) {
4876 if (strlencmp(cmd, "on") == 0) {
4877 newstatus = 1;
4878 } else if (strlencmp(cmd, "off") == 0) {
4879 newstatus = 0;
4880 } else
4881 return -EINVAL;
4882 }
4883
4884 return light_set_status(newstatus);
4885 }
4886
4887 static struct ibm_struct light_driver_data = {
4888 .name = "light",
4889 .read = light_read,
4890 .write = light_write,
4891 .exit = light_exit,
4892 };
4893
4894 /*************************************************************************
4895 * CMOS subdriver
4896 */
4897
4898 /* sysfs cmos_command -------------------------------------------------- */
4899 static ssize_t cmos_command_store(struct device *dev,
4900 struct device_attribute *attr,
4901 const char *buf, size_t count)
4902 {
4903 unsigned long cmos_cmd;
4904 int res;
4905
4906 if (parse_strtoul(buf, 21, &cmos_cmd))
4907 return -EINVAL;
4908
4909 res = issue_thinkpad_cmos_command(cmos_cmd);
4910 return (res)? res : count;
4911 }
4912
4913 static struct device_attribute dev_attr_cmos_command =
4914 __ATTR(cmos_command, S_IWUSR, NULL, cmos_command_store);
4915
4916 /* --------------------------------------------------------------------- */
4917
4918 static int __init cmos_init(struct ibm_init_struct *iibm)
4919 {
4920 int res;
4921
4922 vdbg_printk(TPACPI_DBG_INIT,
4923 "initializing cmos commands subdriver\n");
4924
4925 TPACPI_ACPIHANDLE_INIT(cmos);
4926
4927 vdbg_printk(TPACPI_DBG_INIT, "cmos commands are %s\n",
4928 str_supported(cmos_handle != NULL));
4929
4930 res = device_create_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
4931 if (res)
4932 return res;
4933
4934 return (cmos_handle)? 0 : 1;
4935 }
4936
4937 static void cmos_exit(void)
4938 {
4939 device_remove_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
4940 }
4941
4942 static int cmos_read(struct seq_file *m)
4943 {
4944 /* cmos not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
4945 R30, R31, T20-22, X20-21 */
4946 if (!cmos_handle)
4947 seq_printf(m, "status:\t\tnot supported\n");
4948 else {
4949 seq_printf(m, "status:\t\tsupported\n");
4950 seq_printf(m, "commands:\t<cmd> (<cmd> is 0-21)\n");
4951 }
4952
4953 return 0;
4954 }
4955
4956 static int cmos_write(char *buf)
4957 {
4958 char *cmd;
4959 int cmos_cmd, res;
4960
4961 while ((cmd = next_cmd(&buf))) {
4962 if (sscanf(cmd, "%u", &cmos_cmd) == 1 &&
4963 cmos_cmd >= 0 && cmos_cmd <= 21) {
4964 /* cmos_cmd set */
4965 } else
4966 return -EINVAL;
4967
4968 res = issue_thinkpad_cmos_command(cmos_cmd);
4969 if (res)
4970 return res;
4971 }
4972
4973 return 0;
4974 }
4975
4976 static struct ibm_struct cmos_driver_data = {
4977 .name = "cmos",
4978 .read = cmos_read,
4979 .write = cmos_write,
4980 .exit = cmos_exit,
4981 };
4982
4983 /*************************************************************************
4984 * LED subdriver
4985 */
4986
4987 enum led_access_mode {
4988 TPACPI_LED_NONE = 0,
4989 TPACPI_LED_570, /* 570 */
4990 TPACPI_LED_OLD, /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
4991 TPACPI_LED_NEW, /* all others */
4992 };
4993
4994 enum { /* For TPACPI_LED_OLD */
4995 TPACPI_LED_EC_HLCL = 0x0c, /* EC reg to get led to power on */
4996 TPACPI_LED_EC_HLBL = 0x0d, /* EC reg to blink a lit led */
4997 TPACPI_LED_EC_HLMS = 0x0e, /* EC reg to select led to command */
4998 };
4999
5000 static enum led_access_mode led_supported;
5001
5002 static acpi_handle led_handle;
5003
5004 #define TPACPI_LED_NUMLEDS 16
5005 static struct tpacpi_led_classdev *tpacpi_leds;
5006 static enum led_status_t tpacpi_led_state_cache[TPACPI_LED_NUMLEDS];
5007 static const char * const tpacpi_led_names[TPACPI_LED_NUMLEDS] = {
5008 /* there's a limit of 19 chars + NULL before 2.6.26 */
5009 "tpacpi::power",
5010 "tpacpi:orange:batt",
5011 "tpacpi:green:batt",
5012 "tpacpi::dock_active",
5013 "tpacpi::bay_active",
5014 "tpacpi::dock_batt",
5015 "tpacpi::unknown_led",
5016 "tpacpi::standby",
5017 "tpacpi::dock_status1",
5018 "tpacpi::dock_status2",
5019 "tpacpi::unknown_led2",
5020 "tpacpi::unknown_led3",
5021 "tpacpi::thinkvantage",
5022 };
5023 #define TPACPI_SAFE_LEDS 0x1081U
5024
5025 static inline bool tpacpi_is_led_restricted(const unsigned int led)
5026 {
5027 #ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS
5028 return false;
5029 #else
5030 return (1U & (TPACPI_SAFE_LEDS >> led)) == 0;
5031 #endif
5032 }
5033
5034 static int led_get_status(const unsigned int led)
5035 {
5036 int status;
5037 enum led_status_t led_s;
5038
5039 switch (led_supported) {
5040 case TPACPI_LED_570:
5041 if (!acpi_evalf(ec_handle,
5042 &status, "GLED", "dd", 1 << led))
5043 return -EIO;
5044 led_s = (status == 0)?
5045 TPACPI_LED_OFF :
5046 ((status == 1)?
5047 TPACPI_LED_ON :
5048 TPACPI_LED_BLINK);
5049 tpacpi_led_state_cache[led] = led_s;
5050 return led_s;
5051 default:
5052 return -ENXIO;
5053 }
5054
5055 /* not reached */
5056 }
5057
5058 static int led_set_status(const unsigned int led,
5059 const enum led_status_t ledstatus)
5060 {
5061 /* off, on, blink. Index is led_status_t */
5062 static const unsigned int led_sled_arg1[] = { 0, 1, 3 };
5063 static const unsigned int led_led_arg1[] = { 0, 0x80, 0xc0 };
5064
5065 int rc = 0;
5066
5067 switch (led_supported) {
5068 case TPACPI_LED_570:
5069 /* 570 */
5070 if (unlikely(led > 7))
5071 return -EINVAL;
5072 if (unlikely(tpacpi_is_led_restricted(led)))
5073 return -EPERM;
5074 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
5075 (1 << led), led_sled_arg1[ledstatus]))
5076 rc = -EIO;
5077 break;
5078 case TPACPI_LED_OLD:
5079 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */
5080 if (unlikely(led > 7))
5081 return -EINVAL;
5082 if (unlikely(tpacpi_is_led_restricted(led)))
5083 return -EPERM;
5084 rc = ec_write(TPACPI_LED_EC_HLMS, (1 << led));
5085 if (rc >= 0)
5086 rc = ec_write(TPACPI_LED_EC_HLBL,
5087 (ledstatus == TPACPI_LED_BLINK) << led);
5088 if (rc >= 0)
5089 rc = ec_write(TPACPI_LED_EC_HLCL,
5090 (ledstatus != TPACPI_LED_OFF) << led);
5091 break;
5092 case TPACPI_LED_NEW:
5093 /* all others */
5094 if (unlikely(led >= TPACPI_LED_NUMLEDS))
5095 return -EINVAL;
5096 if (unlikely(tpacpi_is_led_restricted(led)))
5097 return -EPERM;
5098 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
5099 led, led_led_arg1[ledstatus]))
5100 rc = -EIO;
5101 break;
5102 default:
5103 rc = -ENXIO;
5104 }
5105
5106 if (!rc)
5107 tpacpi_led_state_cache[led] = ledstatus;
5108
5109 return rc;
5110 }
5111
5112 static void led_set_status_worker(struct work_struct *work)
5113 {
5114 struct tpacpi_led_classdev *data =
5115 container_of(work, struct tpacpi_led_classdev, work);
5116
5117 if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING))
5118 led_set_status(data->led, data->new_state);
5119 }
5120
5121 static void led_sysfs_set(struct led_classdev *led_cdev,
5122 enum led_brightness brightness)
5123 {
5124 struct tpacpi_led_classdev *data = container_of(led_cdev,
5125 struct tpacpi_led_classdev, led_classdev);
5126
5127 if (brightness == LED_OFF)
5128 data->new_state = TPACPI_LED_OFF;
5129 else if (tpacpi_led_state_cache[data->led] != TPACPI_LED_BLINK)
5130 data->new_state = TPACPI_LED_ON;
5131 else
5132 data->new_state = TPACPI_LED_BLINK;
5133
5134 queue_work(tpacpi_wq, &data->work);
5135 }
5136
5137 static int led_sysfs_blink_set(struct led_classdev *led_cdev,
5138 unsigned long *delay_on, unsigned long *delay_off)
5139 {
5140 struct tpacpi_led_classdev *data = container_of(led_cdev,
5141 struct tpacpi_led_classdev, led_classdev);
5142
5143 /* Can we choose the flash rate? */
5144 if (*delay_on == 0 && *delay_off == 0) {
5145 /* yes. set them to the hardware blink rate (1 Hz) */
5146 *delay_on = 500; /* ms */
5147 *delay_off = 500; /* ms */
5148 } else if ((*delay_on != 500) || (*delay_off != 500))
5149 return -EINVAL;
5150
5151 data->new_state = TPACPI_LED_BLINK;
5152 queue_work(tpacpi_wq, &data->work);
5153
5154 return 0;
5155 }
5156
5157 static enum led_brightness led_sysfs_get(struct led_classdev *led_cdev)
5158 {
5159 int rc;
5160
5161 struct tpacpi_led_classdev *data = container_of(led_cdev,
5162 struct tpacpi_led_classdev, led_classdev);
5163
5164 rc = led_get_status(data->led);
5165
5166 if (rc == TPACPI_LED_OFF || rc < 0)
5167 rc = LED_OFF; /* no error handling in led class :( */
5168 else
5169 rc = LED_FULL;
5170
5171 return rc;
5172 }
5173
5174 static void led_exit(void)
5175 {
5176 unsigned int i;
5177
5178 for (i = 0; i < TPACPI_LED_NUMLEDS; i++) {
5179 if (tpacpi_leds[i].led_classdev.name)
5180 led_classdev_unregister(&tpacpi_leds[i].led_classdev);
5181 }
5182
5183 flush_workqueue(tpacpi_wq);
5184 kfree(tpacpi_leds);
5185 }
5186
5187 static int __init tpacpi_init_led(unsigned int led)
5188 {
5189 int rc;
5190
5191 tpacpi_leds[led].led = led;
5192
5193 /* LEDs with no name don't get registered */
5194 if (!tpacpi_led_names[led])
5195 return 0;
5196
5197 tpacpi_leds[led].led_classdev.brightness_set = &led_sysfs_set;
5198 tpacpi_leds[led].led_classdev.blink_set = &led_sysfs_blink_set;
5199 if (led_supported == TPACPI_LED_570)
5200 tpacpi_leds[led].led_classdev.brightness_get =
5201 &led_sysfs_get;
5202
5203 tpacpi_leds[led].led_classdev.name = tpacpi_led_names[led];
5204
5205 INIT_WORK(&tpacpi_leds[led].work, led_set_status_worker);
5206
5207 rc = led_classdev_register(&tpacpi_pdev->dev,
5208 &tpacpi_leds[led].led_classdev);
5209 if (rc < 0)
5210 tpacpi_leds[led].led_classdev.name = NULL;
5211
5212 return rc;
5213 }
5214
5215 static const struct tpacpi_quirk led_useful_qtable[] __initconst = {
5216 TPACPI_Q_IBM('1', 'E', 0x009f), /* A30 */
5217 TPACPI_Q_IBM('1', 'N', 0x009f), /* A31 */
5218 TPACPI_Q_IBM('1', 'G', 0x009f), /* A31 */
5219
5220 TPACPI_Q_IBM('1', 'I', 0x0097), /* T30 */
5221 TPACPI_Q_IBM('1', 'R', 0x0097), /* T40, T41, T42, R50, R51 */
5222 TPACPI_Q_IBM('7', '0', 0x0097), /* T43, R52 */
5223 TPACPI_Q_IBM('1', 'Y', 0x0097), /* T43 */
5224 TPACPI_Q_IBM('1', 'W', 0x0097), /* R50e */
5225 TPACPI_Q_IBM('1', 'V', 0x0097), /* R51 */
5226 TPACPI_Q_IBM('7', '8', 0x0097), /* R51e */
5227 TPACPI_Q_IBM('7', '6', 0x0097), /* R52 */
5228
5229 TPACPI_Q_IBM('1', 'K', 0x00bf), /* X30 */
5230 TPACPI_Q_IBM('1', 'Q', 0x00bf), /* X31, X32 */
5231 TPACPI_Q_IBM('1', 'U', 0x00bf), /* X40 */
5232 TPACPI_Q_IBM('7', '4', 0x00bf), /* X41 */
5233 TPACPI_Q_IBM('7', '5', 0x00bf), /* X41t */
5234
5235 TPACPI_Q_IBM('7', '9', 0x1f97), /* T60 (1) */
5236 TPACPI_Q_IBM('7', '7', 0x1f97), /* Z60* (1) */
5237 TPACPI_Q_IBM('7', 'F', 0x1f97), /* Z61* (1) */
5238 TPACPI_Q_IBM('7', 'B', 0x1fb7), /* X60 (1) */
5239
5240 /* (1) - may have excess leds enabled on MSB */
5241
5242 /* Defaults (order matters, keep last, don't reorder!) */
5243 { /* Lenovo */
5244 .vendor = PCI_VENDOR_ID_LENOVO,
5245 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY,
5246 .quirks = 0x1fffU,
5247 },
5248 { /* IBM ThinkPads with no EC version string */
5249 .vendor = PCI_VENDOR_ID_IBM,
5250 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_UNKNOWN,
5251 .quirks = 0x00ffU,
5252 },
5253 { /* IBM ThinkPads with EC version string */
5254 .vendor = PCI_VENDOR_ID_IBM,
5255 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY,
5256 .quirks = 0x00bfU,
5257 },
5258 };
5259
5260 #undef TPACPI_LEDQ_IBM
5261 #undef TPACPI_LEDQ_LNV
5262
5263 static enum led_access_mode __init led_init_detect_mode(void)
5264 {
5265 acpi_status status;
5266
5267 if (tpacpi_is_ibm()) {
5268 /* 570 */
5269 status = acpi_get_handle(ec_handle, "SLED", &led_handle);
5270 if (ACPI_SUCCESS(status))
5271 return TPACPI_LED_570;
5272
5273 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
5274 status = acpi_get_handle(ec_handle, "SYSL", &led_handle);
5275 if (ACPI_SUCCESS(status))
5276 return TPACPI_LED_OLD;
5277 }
5278
5279 /* most others */
5280 status = acpi_get_handle(ec_handle, "LED", &led_handle);
5281 if (ACPI_SUCCESS(status))
5282 return TPACPI_LED_NEW;
5283
5284 /* R30, R31, and unknown firmwares */
5285 led_handle = NULL;
5286 return TPACPI_LED_NONE;
5287 }
5288
5289 static int __init led_init(struct ibm_init_struct *iibm)
5290 {
5291 unsigned int i;
5292 int rc;
5293 unsigned long useful_leds;
5294
5295 vdbg_printk(TPACPI_DBG_INIT, "initializing LED subdriver\n");
5296
5297 led_supported = led_init_detect_mode();
5298
5299 if (led_supported != TPACPI_LED_NONE) {
5300 useful_leds = tpacpi_check_quirks(led_useful_qtable,
5301 ARRAY_SIZE(led_useful_qtable));
5302
5303 if (!useful_leds) {
5304 led_handle = NULL;
5305 led_supported = TPACPI_LED_NONE;
5306 }
5307 }
5308
5309 vdbg_printk(TPACPI_DBG_INIT, "LED commands are %s, mode %d\n",
5310 str_supported(led_supported), led_supported);
5311
5312 if (led_supported == TPACPI_LED_NONE)
5313 return 1;
5314
5315 tpacpi_leds = kzalloc(sizeof(*tpacpi_leds) * TPACPI_LED_NUMLEDS,
5316 GFP_KERNEL);
5317 if (!tpacpi_leds) {
5318 pr_err("Out of memory for LED data\n");
5319 return -ENOMEM;
5320 }
5321
5322 for (i = 0; i < TPACPI_LED_NUMLEDS; i++) {
5323 tpacpi_leds[i].led = -1;
5324
5325 if (!tpacpi_is_led_restricted(i) &&
5326 test_bit(i, &useful_leds)) {
5327 rc = tpacpi_init_led(i);
5328 if (rc < 0) {
5329 led_exit();
5330 return rc;
5331 }
5332 }
5333 }
5334
5335 #ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS
5336 pr_notice("warning: userspace override of important "
5337 "firmware LEDs is enabled\n");
5338 #endif
5339 return 0;
5340 }
5341
5342 #define str_led_status(s) \
5343 ((s) == TPACPI_LED_OFF ? "off" : \
5344 ((s) == TPACPI_LED_ON ? "on" : "blinking"))
5345
5346 static int led_read(struct seq_file *m)
5347 {
5348 if (!led_supported) {
5349 seq_printf(m, "status:\t\tnot supported\n");
5350 return 0;
5351 }
5352 seq_printf(m, "status:\t\tsupported\n");
5353
5354 if (led_supported == TPACPI_LED_570) {
5355 /* 570 */
5356 int i, status;
5357 for (i = 0; i < 8; i++) {
5358 status = led_get_status(i);
5359 if (status < 0)
5360 return -EIO;
5361 seq_printf(m, "%d:\t\t%s\n",
5362 i, str_led_status(status));
5363 }
5364 }
5365
5366 seq_printf(m, "commands:\t"
5367 "<led> on, <led> off, <led> blink (<led> is 0-15)\n");
5368
5369 return 0;
5370 }
5371
5372 static int led_write(char *buf)
5373 {
5374 char *cmd;
5375 int led, rc;
5376 enum led_status_t s;
5377
5378 if (!led_supported)
5379 return -ENODEV;
5380
5381 while ((cmd = next_cmd(&buf))) {
5382 if (sscanf(cmd, "%d", &led) != 1)
5383 return -EINVAL;
5384
5385 if (led < 0 || led > (TPACPI_LED_NUMLEDS - 1) ||
5386 tpacpi_leds[led].led < 0)
5387 return -ENODEV;
5388
5389 if (strstr(cmd, "off")) {
5390 s = TPACPI_LED_OFF;
5391 } else if (strstr(cmd, "on")) {
5392 s = TPACPI_LED_ON;
5393 } else if (strstr(cmd, "blink")) {
5394 s = TPACPI_LED_BLINK;
5395 } else {
5396 return -EINVAL;
5397 }
5398
5399 rc = led_set_status(led, s);
5400 if (rc < 0)
5401 return rc;
5402 }
5403
5404 return 0;
5405 }
5406
5407 static struct ibm_struct led_driver_data = {
5408 .name = "led",
5409 .read = led_read,
5410 .write = led_write,
5411 .exit = led_exit,
5412 };
5413
5414 /*************************************************************************
5415 * Beep subdriver
5416 */
5417
5418 TPACPI_HANDLE(beep, ec, "BEEP"); /* all except R30, R31 */
5419
5420 #define TPACPI_BEEP_Q1 0x0001
5421
5422 static const struct tpacpi_quirk beep_quirk_table[] __initconst = {
5423 TPACPI_Q_IBM('I', 'M', TPACPI_BEEP_Q1), /* 570 */
5424 TPACPI_Q_IBM('I', 'U', TPACPI_BEEP_Q1), /* 570E - unverified */
5425 };
5426
5427 static int __init beep_init(struct ibm_init_struct *iibm)
5428 {
5429 unsigned long quirks;
5430
5431 vdbg_printk(TPACPI_DBG_INIT, "initializing beep subdriver\n");
5432
5433 TPACPI_ACPIHANDLE_INIT(beep);
5434
5435 vdbg_printk(TPACPI_DBG_INIT, "beep is %s\n",
5436 str_supported(beep_handle != NULL));
5437
5438 quirks = tpacpi_check_quirks(beep_quirk_table,
5439 ARRAY_SIZE(beep_quirk_table));
5440
5441 tp_features.beep_needs_two_args = !!(quirks & TPACPI_BEEP_Q1);
5442
5443 return (beep_handle)? 0 : 1;
5444 }
5445
5446 static int beep_read(struct seq_file *m)
5447 {
5448 if (!beep_handle)
5449 seq_printf(m, "status:\t\tnot supported\n");
5450 else {
5451 seq_printf(m, "status:\t\tsupported\n");
5452 seq_printf(m, "commands:\t<cmd> (<cmd> is 0-17)\n");
5453 }
5454
5455 return 0;
5456 }
5457
5458 static int beep_write(char *buf)
5459 {
5460 char *cmd;
5461 int beep_cmd;
5462
5463 if (!beep_handle)
5464 return -ENODEV;
5465
5466 while ((cmd = next_cmd(&buf))) {
5467 if (sscanf(cmd, "%u", &beep_cmd) == 1 &&
5468 beep_cmd >= 0 && beep_cmd <= 17) {
5469 /* beep_cmd set */
5470 } else
5471 return -EINVAL;
5472 if (tp_features.beep_needs_two_args) {
5473 if (!acpi_evalf(beep_handle, NULL, NULL, "vdd",
5474 beep_cmd, 0))
5475 return -EIO;
5476 } else {
5477 if (!acpi_evalf(beep_handle, NULL, NULL, "vd",
5478 beep_cmd))
5479 return -EIO;
5480 }
5481 }
5482
5483 return 0;
5484 }
5485
5486 static struct ibm_struct beep_driver_data = {
5487 .name = "beep",
5488 .read = beep_read,
5489 .write = beep_write,
5490 };
5491
5492 /*************************************************************************
5493 * Thermal subdriver
5494 */
5495
5496 enum thermal_access_mode {
5497 TPACPI_THERMAL_NONE = 0, /* No thermal support */
5498 TPACPI_THERMAL_ACPI_TMP07, /* Use ACPI TMP0-7 */
5499 TPACPI_THERMAL_ACPI_UPDT, /* Use ACPI TMP0-7 with UPDT */
5500 TPACPI_THERMAL_TPEC_8, /* Use ACPI EC regs, 8 sensors */
5501 TPACPI_THERMAL_TPEC_16, /* Use ACPI EC regs, 16 sensors */
5502 };
5503
5504 enum { /* TPACPI_THERMAL_TPEC_* */
5505 TP_EC_THERMAL_TMP0 = 0x78, /* ACPI EC regs TMP 0..7 */
5506 TP_EC_THERMAL_TMP8 = 0xC0, /* ACPI EC regs TMP 8..15 */
5507 TP_EC_THERMAL_TMP_NA = -128, /* ACPI EC sensor not available */
5508
5509 TPACPI_THERMAL_SENSOR_NA = -128000, /* Sensor not available */
5510 };
5511
5512
5513 #define TPACPI_MAX_THERMAL_SENSORS 16 /* Max thermal sensors supported */
5514 struct ibm_thermal_sensors_struct {
5515 s32 temp[TPACPI_MAX_THERMAL_SENSORS];
5516 };
5517
5518 static enum thermal_access_mode thermal_read_mode;
5519
5520 /* idx is zero-based */
5521 static int thermal_get_sensor(int idx, s32 *value)
5522 {
5523 int t;
5524 s8 tmp;
5525 char tmpi[5];
5526
5527 t = TP_EC_THERMAL_TMP0;
5528
5529 switch (thermal_read_mode) {
5530 #if TPACPI_MAX_THERMAL_SENSORS >= 16
5531 case TPACPI_THERMAL_TPEC_16:
5532 if (idx >= 8 && idx <= 15) {
5533 t = TP_EC_THERMAL_TMP8;
5534 idx -= 8;
5535 }
5536 /* fallthrough */
5537 #endif
5538 case TPACPI_THERMAL_TPEC_8:
5539 if (idx <= 7) {
5540 if (!acpi_ec_read(t + idx, &tmp))
5541 return -EIO;
5542 *value = tmp * 1000;
5543 return 0;
5544 }
5545 break;
5546
5547 case TPACPI_THERMAL_ACPI_UPDT:
5548 if (idx <= 7) {
5549 snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
5550 if (!acpi_evalf(ec_handle, NULL, "UPDT", "v"))
5551 return -EIO;
5552 if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
5553 return -EIO;
5554 *value = (t - 2732) * 100;
5555 return 0;
5556 }
5557 break;
5558
5559 case TPACPI_THERMAL_ACPI_TMP07:
5560 if (idx <= 7) {
5561 snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
5562 if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
5563 return -EIO;
5564 if (t > 127 || t < -127)
5565 t = TP_EC_THERMAL_TMP_NA;
5566 *value = t * 1000;
5567 return 0;
5568 }
5569 break;
5570
5571 case TPACPI_THERMAL_NONE:
5572 default:
5573 return -ENOSYS;
5574 }
5575
5576 return -EINVAL;
5577 }
5578
5579 static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s)
5580 {
5581 int res, i;
5582 int n;
5583
5584 n = 8;
5585 i = 0;
5586
5587 if (!s)
5588 return -EINVAL;
5589
5590 if (thermal_read_mode == TPACPI_THERMAL_TPEC_16)
5591 n = 16;
5592
5593 for (i = 0 ; i < n; i++) {
5594 res = thermal_get_sensor(i, &s->temp[i]);
5595 if (res)
5596 return res;
5597 }
5598
5599 return n;
5600 }
5601
5602 static void thermal_dump_all_sensors(void)
5603 {
5604 int n, i;
5605 struct ibm_thermal_sensors_struct t;
5606
5607 n = thermal_get_sensors(&t);
5608 if (n <= 0)
5609 return;
5610
5611 pr_notice("temperatures (Celsius):");
5612
5613 for (i = 0; i < n; i++) {
5614 if (t.temp[i] != TPACPI_THERMAL_SENSOR_NA)
5615 pr_cont(" %d", (int)(t.temp[i] / 1000));
5616 else
5617 pr_cont(" N/A");
5618 }
5619
5620 pr_cont("\n");
5621 }
5622
5623 /* sysfs temp##_input -------------------------------------------------- */
5624
5625 static ssize_t thermal_temp_input_show(struct device *dev,
5626 struct device_attribute *attr,
5627 char *buf)
5628 {
5629 struct sensor_device_attribute *sensor_attr =
5630 to_sensor_dev_attr(attr);
5631 int idx = sensor_attr->index;
5632 s32 value;
5633 int res;
5634
5635 res = thermal_get_sensor(idx, &value);
5636 if (res)
5637 return res;
5638 if (value == TPACPI_THERMAL_SENSOR_NA)
5639 return -ENXIO;
5640
5641 return snprintf(buf, PAGE_SIZE, "%d\n", value);
5642 }
5643
5644 #define THERMAL_SENSOR_ATTR_TEMP(_idxA, _idxB) \
5645 SENSOR_ATTR(temp##_idxA##_input, S_IRUGO, \
5646 thermal_temp_input_show, NULL, _idxB)
5647
5648 static struct sensor_device_attribute sensor_dev_attr_thermal_temp_input[] = {
5649 THERMAL_SENSOR_ATTR_TEMP(1, 0),
5650 THERMAL_SENSOR_ATTR_TEMP(2, 1),
5651 THERMAL_SENSOR_ATTR_TEMP(3, 2),
5652 THERMAL_SENSOR_ATTR_TEMP(4, 3),
5653 THERMAL_SENSOR_ATTR_TEMP(5, 4),
5654 THERMAL_SENSOR_ATTR_TEMP(6, 5),
5655 THERMAL_SENSOR_ATTR_TEMP(7, 6),
5656 THERMAL_SENSOR_ATTR_TEMP(8, 7),
5657 THERMAL_SENSOR_ATTR_TEMP(9, 8),
5658 THERMAL_SENSOR_ATTR_TEMP(10, 9),
5659 THERMAL_SENSOR_ATTR_TEMP(11, 10),
5660 THERMAL_SENSOR_ATTR_TEMP(12, 11),
5661 THERMAL_SENSOR_ATTR_TEMP(13, 12),
5662 THERMAL_SENSOR_ATTR_TEMP(14, 13),
5663 THERMAL_SENSOR_ATTR_TEMP(15, 14),
5664 THERMAL_SENSOR_ATTR_TEMP(16, 15),
5665 };
5666
5667 #define THERMAL_ATTRS(X) \
5668 &sensor_dev_attr_thermal_temp_input[X].dev_attr.attr
5669
5670 static struct attribute *thermal_temp_input_attr[] = {
5671 THERMAL_ATTRS(8),
5672 THERMAL_ATTRS(9),
5673 THERMAL_ATTRS(10),
5674 THERMAL_ATTRS(11),
5675 THERMAL_ATTRS(12),
5676 THERMAL_ATTRS(13),
5677 THERMAL_ATTRS(14),
5678 THERMAL_ATTRS(15),
5679 THERMAL_ATTRS(0),
5680 THERMAL_ATTRS(1),
5681 THERMAL_ATTRS(2),
5682 THERMAL_ATTRS(3),
5683 THERMAL_ATTRS(4),
5684 THERMAL_ATTRS(5),
5685 THERMAL_ATTRS(6),
5686 THERMAL_ATTRS(7),
5687 NULL
5688 };
5689
5690 static const struct attribute_group thermal_temp_input16_group = {
5691 .attrs = thermal_temp_input_attr
5692 };
5693
5694 static const struct attribute_group thermal_temp_input8_group = {
5695 .attrs = &thermal_temp_input_attr[8]
5696 };
5697
5698 #undef THERMAL_SENSOR_ATTR_TEMP
5699 #undef THERMAL_ATTRS
5700
5701 /* --------------------------------------------------------------------- */
5702
5703 static int __init thermal_init(struct ibm_init_struct *iibm)
5704 {
5705 u8 t, ta1, ta2;
5706 int i;
5707 int acpi_tmp7;
5708 int res;
5709
5710 vdbg_printk(TPACPI_DBG_INIT, "initializing thermal subdriver\n");
5711
5712 acpi_tmp7 = acpi_evalf(ec_handle, NULL, "TMP7", "qv");
5713
5714 if (thinkpad_id.ec_model) {
5715 /*
5716 * Direct EC access mode: sensors at registers
5717 * 0x78-0x7F, 0xC0-0xC7. Registers return 0x00 for
5718 * non-implemented, thermal sensors return 0x80 when
5719 * not available
5720 */
5721
5722 ta1 = ta2 = 0;
5723 for (i = 0; i < 8; i++) {
5724 if (acpi_ec_read(TP_EC_THERMAL_TMP0 + i, &t)) {
5725 ta1 |= t;
5726 } else {
5727 ta1 = 0;
5728 break;
5729 }
5730 if (acpi_ec_read(TP_EC_THERMAL_TMP8 + i, &t)) {
5731 ta2 |= t;
5732 } else {
5733 ta1 = 0;
5734 break;
5735 }
5736 }
5737 if (ta1 == 0) {
5738 /* This is sheer paranoia, but we handle it anyway */
5739 if (acpi_tmp7) {
5740 pr_err("ThinkPad ACPI EC access misbehaving, "
5741 "falling back to ACPI TMPx access "
5742 "mode\n");
5743 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
5744 } else {
5745 pr_err("ThinkPad ACPI EC access misbehaving, "
5746 "disabling thermal sensors access\n");
5747 thermal_read_mode = TPACPI_THERMAL_NONE;
5748 }
5749 } else {
5750 thermal_read_mode =
5751 (ta2 != 0) ?
5752 TPACPI_THERMAL_TPEC_16 : TPACPI_THERMAL_TPEC_8;
5753 }
5754 } else if (acpi_tmp7) {
5755 if (tpacpi_is_ibm() &&
5756 acpi_evalf(ec_handle, NULL, "UPDT", "qv")) {
5757 /* 600e/x, 770e, 770x */
5758 thermal_read_mode = TPACPI_THERMAL_ACPI_UPDT;
5759 } else {
5760 /* IBM/LENOVO DSDT EC.TMPx access, max 8 sensors */
5761 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
5762 }
5763 } else {
5764 /* temperatures not supported on 570, G4x, R30, R31, R32 */
5765 thermal_read_mode = TPACPI_THERMAL_NONE;
5766 }
5767
5768 vdbg_printk(TPACPI_DBG_INIT, "thermal is %s, mode %d\n",
5769 str_supported(thermal_read_mode != TPACPI_THERMAL_NONE),
5770 thermal_read_mode);
5771
5772 switch (thermal_read_mode) {
5773 case TPACPI_THERMAL_TPEC_16:
5774 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
5775 &thermal_temp_input16_group);
5776 if (res)
5777 return res;
5778 break;
5779 case TPACPI_THERMAL_TPEC_8:
5780 case TPACPI_THERMAL_ACPI_TMP07:
5781 case TPACPI_THERMAL_ACPI_UPDT:
5782 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
5783 &thermal_temp_input8_group);
5784 if (res)
5785 return res;
5786 break;
5787 case TPACPI_THERMAL_NONE:
5788 default:
5789 return 1;
5790 }
5791
5792 return 0;
5793 }
5794
5795 static void thermal_exit(void)
5796 {
5797 switch (thermal_read_mode) {
5798 case TPACPI_THERMAL_TPEC_16:
5799 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
5800 &thermal_temp_input16_group);
5801 break;
5802 case TPACPI_THERMAL_TPEC_8:
5803 case TPACPI_THERMAL_ACPI_TMP07:
5804 case TPACPI_THERMAL_ACPI_UPDT:
5805 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
5806 &thermal_temp_input8_group);
5807 break;
5808 case TPACPI_THERMAL_NONE:
5809 default:
5810 break;
5811 }
5812 }
5813
5814 static int thermal_read(struct seq_file *m)
5815 {
5816 int n, i;
5817 struct ibm_thermal_sensors_struct t;
5818
5819 n = thermal_get_sensors(&t);
5820 if (unlikely(n < 0))
5821 return n;
5822
5823 seq_printf(m, "temperatures:\t");
5824
5825 if (n > 0) {
5826 for (i = 0; i < (n - 1); i++)
5827 seq_printf(m, "%d ", t.temp[i] / 1000);
5828 seq_printf(m, "%d\n", t.temp[i] / 1000);
5829 } else
5830 seq_printf(m, "not supported\n");
5831
5832 return 0;
5833 }
5834
5835 static struct ibm_struct thermal_driver_data = {
5836 .name = "thermal",
5837 .read = thermal_read,
5838 .exit = thermal_exit,
5839 };
5840
5841 /*************************************************************************
5842 * Backlight/brightness subdriver
5843 */
5844
5845 #define TPACPI_BACKLIGHT_DEV_NAME "thinkpad_screen"
5846
5847 /*
5848 * ThinkPads can read brightness from two places: EC HBRV (0x31), or
5849 * CMOS NVRAM byte 0x5E, bits 0-3.
5850 *
5851 * EC HBRV (0x31) has the following layout
5852 * Bit 7: unknown function
5853 * Bit 6: unknown function
5854 * Bit 5: Z: honour scale changes, NZ: ignore scale changes
5855 * Bit 4: must be set to zero to avoid problems
5856 * Bit 3-0: backlight brightness level
5857 *
5858 * brightness_get_raw returns status data in the HBRV layout
5859 *
5860 * WARNING: The X61 has been verified to use HBRV for something else, so
5861 * this should be used _only_ on IBM ThinkPads, and maybe with some careful
5862 * testing on the very early *60 Lenovo models...
5863 */
5864
5865 enum {
5866 TP_EC_BACKLIGHT = 0x31,
5867
5868 /* TP_EC_BACKLIGHT bitmasks */
5869 TP_EC_BACKLIGHT_LVLMSK = 0x1F,
5870 TP_EC_BACKLIGHT_CMDMSK = 0xE0,
5871 TP_EC_BACKLIGHT_MAPSW = 0x20,
5872 };
5873
5874 enum tpacpi_brightness_access_mode {
5875 TPACPI_BRGHT_MODE_AUTO = 0, /* Not implemented yet */
5876 TPACPI_BRGHT_MODE_EC, /* EC control */
5877 TPACPI_BRGHT_MODE_UCMS_STEP, /* UCMS step-based control */
5878 TPACPI_BRGHT_MODE_ECNVRAM, /* EC control w/ NVRAM store */
5879 TPACPI_BRGHT_MODE_MAX
5880 };
5881
5882 static struct backlight_device *ibm_backlight_device;
5883
5884 static enum tpacpi_brightness_access_mode brightness_mode =
5885 TPACPI_BRGHT_MODE_MAX;
5886
5887 static unsigned int brightness_enable = 2; /* 2 = auto, 0 = no, 1 = yes */
5888
5889 static struct mutex brightness_mutex;
5890
5891 /* NVRAM brightness access,
5892 * call with brightness_mutex held! */
5893 static unsigned int tpacpi_brightness_nvram_get(void)
5894 {
5895 u8 lnvram;
5896
5897 lnvram = (nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS)
5898 & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
5899 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
5900 lnvram &= bright_maxlvl;
5901
5902 return lnvram;
5903 }
5904
5905 static void tpacpi_brightness_checkpoint_nvram(void)
5906 {
5907 u8 lec = 0;
5908 u8 b_nvram;
5909
5910 if (brightness_mode != TPACPI_BRGHT_MODE_ECNVRAM)
5911 return;
5912
5913 vdbg_printk(TPACPI_DBG_BRGHT,
5914 "trying to checkpoint backlight level to NVRAM...\n");
5915
5916 if (mutex_lock_killable(&brightness_mutex) < 0)
5917 return;
5918
5919 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
5920 goto unlock;
5921 lec &= TP_EC_BACKLIGHT_LVLMSK;
5922 b_nvram = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS);
5923
5924 if (lec != ((b_nvram & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
5925 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS)) {
5926 /* NVRAM needs update */
5927 b_nvram &= ~(TP_NVRAM_MASK_LEVEL_BRIGHTNESS <<
5928 TP_NVRAM_POS_LEVEL_BRIGHTNESS);
5929 b_nvram |= lec;
5930 nvram_write_byte(b_nvram, TP_NVRAM_ADDR_BRIGHTNESS);
5931 dbg_printk(TPACPI_DBG_BRGHT,
5932 "updated NVRAM backlight level to %u (0x%02x)\n",
5933 (unsigned int) lec, (unsigned int) b_nvram);
5934 } else
5935 vdbg_printk(TPACPI_DBG_BRGHT,
5936 "NVRAM backlight level already is %u (0x%02x)\n",
5937 (unsigned int) lec, (unsigned int) b_nvram);
5938
5939 unlock:
5940 mutex_unlock(&brightness_mutex);
5941 }
5942
5943
5944 /* call with brightness_mutex held! */
5945 static int tpacpi_brightness_get_raw(int *status)
5946 {
5947 u8 lec = 0;
5948
5949 switch (brightness_mode) {
5950 case TPACPI_BRGHT_MODE_UCMS_STEP:
5951 *status = tpacpi_brightness_nvram_get();
5952 return 0;
5953 case TPACPI_BRGHT_MODE_EC:
5954 case TPACPI_BRGHT_MODE_ECNVRAM:
5955 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
5956 return -EIO;
5957 *status = lec;
5958 return 0;
5959 default:
5960 return -ENXIO;
5961 }
5962 }
5963
5964 /* call with brightness_mutex held! */
5965 /* do NOT call with illegal backlight level value */
5966 static int tpacpi_brightness_set_ec(unsigned int value)
5967 {
5968 u8 lec = 0;
5969
5970 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
5971 return -EIO;
5972
5973 if (unlikely(!acpi_ec_write(TP_EC_BACKLIGHT,
5974 (lec & TP_EC_BACKLIGHT_CMDMSK) |
5975 (value & TP_EC_BACKLIGHT_LVLMSK))))
5976 return -EIO;
5977
5978 return 0;
5979 }
5980
5981 /* call with brightness_mutex held! */
5982 static int tpacpi_brightness_set_ucmsstep(unsigned int value)
5983 {
5984 int cmos_cmd, inc;
5985 unsigned int current_value, i;
5986
5987 current_value = tpacpi_brightness_nvram_get();
5988
5989 if (value == current_value)
5990 return 0;
5991
5992 cmos_cmd = (value > current_value) ?
5993 TP_CMOS_BRIGHTNESS_UP :
5994 TP_CMOS_BRIGHTNESS_DOWN;
5995 inc = (value > current_value) ? 1 : -1;
5996
5997 for (i = current_value; i != value; i += inc)
5998 if (issue_thinkpad_cmos_command(cmos_cmd))
5999 return -EIO;
6000
6001 return 0;
6002 }
6003
6004 /* May return EINTR which can always be mapped to ERESTARTSYS */
6005 static int brightness_set(unsigned int value)
6006 {
6007 int res;
6008
6009 if (value > bright_maxlvl || value < 0)
6010 return -EINVAL;
6011
6012 vdbg_printk(TPACPI_DBG_BRGHT,
6013 "set backlight level to %d\n", value);
6014
6015 res = mutex_lock_killable(&brightness_mutex);
6016 if (res < 0)
6017 return res;
6018
6019 switch (brightness_mode) {
6020 case TPACPI_BRGHT_MODE_EC:
6021 case TPACPI_BRGHT_MODE_ECNVRAM:
6022 res = tpacpi_brightness_set_ec(value);
6023 break;
6024 case TPACPI_BRGHT_MODE_UCMS_STEP:
6025 res = tpacpi_brightness_set_ucmsstep(value);
6026 break;
6027 default:
6028 res = -ENXIO;
6029 }
6030
6031 mutex_unlock(&brightness_mutex);
6032 return res;
6033 }
6034
6035 /* sysfs backlight class ----------------------------------------------- */
6036
6037 static int brightness_update_status(struct backlight_device *bd)
6038 {
6039 unsigned int level =
6040 (bd->props.fb_blank == FB_BLANK_UNBLANK &&
6041 bd->props.power == FB_BLANK_UNBLANK) ?
6042 bd->props.brightness : 0;
6043
6044 dbg_printk(TPACPI_DBG_BRGHT,
6045 "backlight: attempt to set level to %d\n",
6046 level);
6047
6048 /* it is the backlight class's job (caller) to handle
6049 * EINTR and other errors properly */
6050 return brightness_set(level);
6051 }
6052
6053 static int brightness_get(struct backlight_device *bd)
6054 {
6055 int status, res;
6056
6057 res = mutex_lock_killable(&brightness_mutex);
6058 if (res < 0)
6059 return 0;
6060
6061 res = tpacpi_brightness_get_raw(&status);
6062
6063 mutex_unlock(&brightness_mutex);
6064
6065 if (res < 0)
6066 return 0;
6067
6068 return status & TP_EC_BACKLIGHT_LVLMSK;
6069 }
6070
6071 static void tpacpi_brightness_notify_change(void)
6072 {
6073 backlight_force_update(ibm_backlight_device,
6074 BACKLIGHT_UPDATE_HOTKEY);
6075 }
6076
6077 static const struct backlight_ops ibm_backlight_data = {
6078 .get_brightness = brightness_get,
6079 .update_status = brightness_update_status,
6080 };
6081
6082 /* --------------------------------------------------------------------- */
6083
6084 /*
6085 * Call _BCL method of video device. On some ThinkPads this will
6086 * switch the firmware to the ACPI brightness control mode.
6087 */
6088
6089 static int __init tpacpi_query_bcl_levels(acpi_handle handle)
6090 {
6091 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
6092 union acpi_object *obj;
6093 int rc;
6094
6095 if (ACPI_SUCCESS(acpi_evaluate_object(handle, "_BCL", NULL, &buffer))) {
6096 obj = (union acpi_object *)buffer.pointer;
6097 if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) {
6098 pr_err("Unknown _BCL data, please report this to %s\n",
6099 TPACPI_MAIL);
6100 rc = 0;
6101 } else {
6102 rc = obj->package.count;
6103 }
6104 } else {
6105 return 0;
6106 }
6107
6108 kfree(buffer.pointer);
6109 return rc;
6110 }
6111
6112
6113 /*
6114 * Returns 0 (no ACPI _BCL or _BCL invalid), or size of brightness map
6115 */
6116 static unsigned int __init tpacpi_check_std_acpi_brightness_support(void)
6117 {
6118 acpi_handle video_device;
6119 int bcl_levels = 0;
6120
6121 tpacpi_acpi_handle_locate("video", ACPI_VIDEO_HID, &video_device);
6122 if (video_device)
6123 bcl_levels = tpacpi_query_bcl_levels(video_device);
6124
6125 tp_features.bright_acpimode = (bcl_levels > 0);
6126
6127 return (bcl_levels > 2) ? (bcl_levels - 2) : 0;
6128 }
6129
6130 /*
6131 * These are only useful for models that have only one possibility
6132 * of GPU. If the BIOS model handles both ATI and Intel, don't use
6133 * these quirks.
6134 */
6135 #define TPACPI_BRGHT_Q_NOEC 0x0001 /* Must NOT use EC HBRV */
6136 #define TPACPI_BRGHT_Q_EC 0x0002 /* Should or must use EC HBRV */
6137 #define TPACPI_BRGHT_Q_ASK 0x8000 /* Ask for user report */
6138
6139 static const struct tpacpi_quirk brightness_quirk_table[] __initconst = {
6140 /* Models with ATI GPUs known to require ECNVRAM mode */
6141 TPACPI_Q_IBM('1', 'Y', TPACPI_BRGHT_Q_EC), /* T43/p ATI */
6142
6143 /* Models with ATI GPUs that can use ECNVRAM */
6144 TPACPI_Q_IBM('1', 'R', TPACPI_BRGHT_Q_EC), /* R50,51 T40-42 */
6145 TPACPI_Q_IBM('1', 'Q', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
6146 TPACPI_Q_IBM('7', '6', TPACPI_BRGHT_Q_EC), /* R52 */
6147 TPACPI_Q_IBM('7', '8', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
6148
6149 /* Models with Intel Extreme Graphics 2 */
6150 TPACPI_Q_IBM('1', 'U', TPACPI_BRGHT_Q_NOEC), /* X40 */
6151 TPACPI_Q_IBM('1', 'V', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
6152 TPACPI_Q_IBM('1', 'W', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
6153
6154 /* Models with Intel GMA900 */
6155 TPACPI_Q_IBM('7', '0', TPACPI_BRGHT_Q_NOEC), /* T43, R52 */
6156 TPACPI_Q_IBM('7', '4', TPACPI_BRGHT_Q_NOEC), /* X41 */
6157 TPACPI_Q_IBM('7', '5', TPACPI_BRGHT_Q_NOEC), /* X41 Tablet */
6158 };
6159
6160 /*
6161 * Returns < 0 for error, otherwise sets tp_features.bright_*
6162 * and bright_maxlvl.
6163 */
6164 static void __init tpacpi_detect_brightness_capabilities(void)
6165 {
6166 unsigned int b;
6167
6168 vdbg_printk(TPACPI_DBG_INIT,
6169 "detecting firmware brightness interface capabilities\n");
6170
6171 /* we could run a quirks check here (same table used by
6172 * brightness_init) if needed */
6173
6174 /*
6175 * We always attempt to detect acpi support, so as to switch
6176 * Lenovo Vista BIOS to ACPI brightness mode even if we are not
6177 * going to publish a backlight interface
6178 */
6179 b = tpacpi_check_std_acpi_brightness_support();
6180 switch (b) {
6181 case 16:
6182 bright_maxlvl = 15;
6183 pr_info("detected a 16-level brightness capable ThinkPad\n");
6184 break;
6185 case 8:
6186 case 0:
6187 bright_maxlvl = 7;
6188 pr_info("detected a 8-level brightness capable ThinkPad\n");
6189 break;
6190 default:
6191 pr_err("Unsupported brightness interface, "
6192 "please contact %s\n", TPACPI_MAIL);
6193 tp_features.bright_unkfw = 1;
6194 bright_maxlvl = b - 1;
6195 }
6196 }
6197
6198 static int __init brightness_init(struct ibm_init_struct *iibm)
6199 {
6200 struct backlight_properties props;
6201 int b;
6202 unsigned long quirks;
6203
6204 vdbg_printk(TPACPI_DBG_INIT, "initializing brightness subdriver\n");
6205
6206 mutex_init(&brightness_mutex);
6207
6208 quirks = tpacpi_check_quirks(brightness_quirk_table,
6209 ARRAY_SIZE(brightness_quirk_table));
6210
6211 /* tpacpi_detect_brightness_capabilities() must have run already */
6212
6213 /* if it is unknown, we don't handle it: it wouldn't be safe */
6214 if (tp_features.bright_unkfw)
6215 return 1;
6216
6217 if (!brightness_enable) {
6218 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT,
6219 "brightness support disabled by "
6220 "module parameter\n");
6221 return 1;
6222 }
6223
6224 if (acpi_video_backlight_support()) {
6225 if (brightness_enable > 1) {
6226 pr_info("Standard ACPI backlight interface "
6227 "available, not loading native one\n");
6228 return 1;
6229 } else if (brightness_enable == 1) {
6230 pr_warn("Cannot enable backlight brightness support, "
6231 "ACPI is already handling it. Refer to the "
6232 "acpi_backlight kernel parameter.\n");
6233 return 1;
6234 }
6235 } else if (tp_features.bright_acpimode && brightness_enable > 1) {
6236 pr_notice("Standard ACPI backlight interface not "
6237 "available, thinkpad_acpi native "
6238 "brightness control enabled\n");
6239 }
6240
6241 /*
6242 * Check for module parameter bogosity, note that we
6243 * init brightness_mode to TPACPI_BRGHT_MODE_MAX in order to be
6244 * able to detect "unspecified"
6245 */
6246 if (brightness_mode > TPACPI_BRGHT_MODE_MAX)
6247 return -EINVAL;
6248
6249 /* TPACPI_BRGHT_MODE_AUTO not implemented yet, just use default */
6250 if (brightness_mode == TPACPI_BRGHT_MODE_AUTO ||
6251 brightness_mode == TPACPI_BRGHT_MODE_MAX) {
6252 if (quirks & TPACPI_BRGHT_Q_EC)
6253 brightness_mode = TPACPI_BRGHT_MODE_ECNVRAM;
6254 else
6255 brightness_mode = TPACPI_BRGHT_MODE_UCMS_STEP;
6256
6257 dbg_printk(TPACPI_DBG_BRGHT,
6258 "driver auto-selected brightness_mode=%d\n",
6259 brightness_mode);
6260 }
6261
6262 /* Safety */
6263 if (!tpacpi_is_ibm() &&
6264 (brightness_mode == TPACPI_BRGHT_MODE_ECNVRAM ||
6265 brightness_mode == TPACPI_BRGHT_MODE_EC))
6266 return -EINVAL;
6267
6268 if (tpacpi_brightness_get_raw(&b) < 0)
6269 return 1;
6270
6271 memset(&props, 0, sizeof(struct backlight_properties));
6272 props.type = BACKLIGHT_PLATFORM;
6273 props.max_brightness = bright_maxlvl;
6274 props.brightness = b & TP_EC_BACKLIGHT_LVLMSK;
6275 ibm_backlight_device = backlight_device_register(TPACPI_BACKLIGHT_DEV_NAME,
6276 NULL, NULL,
6277 &ibm_backlight_data,
6278 &props);
6279 if (IS_ERR(ibm_backlight_device)) {
6280 int rc = PTR_ERR(ibm_backlight_device);
6281 ibm_backlight_device = NULL;
6282 pr_err("Could not register backlight device\n");
6283 return rc;
6284 }
6285 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT,
6286 "brightness is supported\n");
6287
6288 if (quirks & TPACPI_BRGHT_Q_ASK) {
6289 pr_notice("brightness: will use unverified default: "
6290 "brightness_mode=%d\n", brightness_mode);
6291 pr_notice("brightness: please report to %s whether it works well "
6292 "or not on your ThinkPad\n", TPACPI_MAIL);
6293 }
6294
6295 /* Added by mistake in early 2007. Probably useless, but it could
6296 * be working around some unknown firmware problem where the value
6297 * read at startup doesn't match the real hardware state... so leave
6298 * it in place just in case */
6299 backlight_update_status(ibm_backlight_device);
6300
6301 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT,
6302 "brightness: registering brightness hotkeys "
6303 "as change notification\n");
6304 tpacpi_hotkey_driver_mask_set(hotkey_driver_mask
6305 | TP_ACPI_HKEY_BRGHTUP_MASK
6306 | TP_ACPI_HKEY_BRGHTDWN_MASK);
6307 return 0;
6308 }
6309
6310 static void brightness_suspend(void)
6311 {
6312 tpacpi_brightness_checkpoint_nvram();
6313 }
6314
6315 static void brightness_shutdown(void)
6316 {
6317 tpacpi_brightness_checkpoint_nvram();
6318 }
6319
6320 static void brightness_exit(void)
6321 {
6322 if (ibm_backlight_device) {
6323 vdbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_BRGHT,
6324 "calling backlight_device_unregister()\n");
6325 backlight_device_unregister(ibm_backlight_device);
6326 }
6327
6328 tpacpi_brightness_checkpoint_nvram();
6329 }
6330
6331 static int brightness_read(struct seq_file *m)
6332 {
6333 int level;
6334
6335 level = brightness_get(NULL);
6336 if (level < 0) {
6337 seq_printf(m, "level:\t\tunreadable\n");
6338 } else {
6339 seq_printf(m, "level:\t\t%d\n", level);
6340 seq_printf(m, "commands:\tup, down\n");
6341 seq_printf(m, "commands:\tlevel <level> (<level> is 0-%d)\n",
6342 bright_maxlvl);
6343 }
6344
6345 return 0;
6346 }
6347
6348 static int brightness_write(char *buf)
6349 {
6350 int level;
6351 int rc;
6352 char *cmd;
6353
6354 level = brightness_get(NULL);
6355 if (level < 0)
6356 return level;
6357
6358 while ((cmd = next_cmd(&buf))) {
6359 if (strlencmp(cmd, "up") == 0) {
6360 if (level < bright_maxlvl)
6361 level++;
6362 } else if (strlencmp(cmd, "down") == 0) {
6363 if (level > 0)
6364 level--;
6365 } else if (sscanf(cmd, "level %d", &level) == 1 &&
6366 level >= 0 && level <= bright_maxlvl) {
6367 /* new level set */
6368 } else
6369 return -EINVAL;
6370 }
6371
6372 tpacpi_disclose_usertask("procfs brightness",
6373 "set level to %d\n", level);
6374
6375 /*
6376 * Now we know what the final level should be, so we try to set it.
6377 * Doing it this way makes the syscall restartable in case of EINTR
6378 */
6379 rc = brightness_set(level);
6380 if (!rc && ibm_backlight_device)
6381 backlight_force_update(ibm_backlight_device,
6382 BACKLIGHT_UPDATE_SYSFS);
6383 return (rc == -EINTR)? -ERESTARTSYS : rc;
6384 }
6385
6386 static struct ibm_struct brightness_driver_data = {
6387 .name = "brightness",
6388 .read = brightness_read,
6389 .write = brightness_write,
6390 .exit = brightness_exit,
6391 .suspend = brightness_suspend,
6392 .shutdown = brightness_shutdown,
6393 };
6394
6395 /*************************************************************************
6396 * Volume subdriver
6397 */
6398
6399 /*
6400 * IBM ThinkPads have a simple volume controller with MUTE gating.
6401 * Very early Lenovo ThinkPads follow the IBM ThinkPad spec.
6402 *
6403 * Since the *61 series (and probably also the later *60 series), Lenovo
6404 * ThinkPads only implement the MUTE gate.
6405 *
6406 * EC register 0x30
6407 * Bit 6: MUTE (1 mutes sound)
6408 * Bit 3-0: Volume
6409 * Other bits should be zero as far as we know.
6410 *
6411 * This is also stored in CMOS NVRAM, byte 0x60, bit 6 (MUTE), and
6412 * bits 3-0 (volume). Other bits in NVRAM may have other functions,
6413 * such as bit 7 which is used to detect repeated presses of MUTE,
6414 * and we leave them unchanged.
6415 */
6416
6417 #ifdef CONFIG_THINKPAD_ACPI_ALSA_SUPPORT
6418
6419 #define TPACPI_ALSA_DRVNAME "ThinkPad EC"
6420 #define TPACPI_ALSA_SHRTNAME "ThinkPad Console Audio Control"
6421 #define TPACPI_ALSA_MIXERNAME TPACPI_ALSA_SHRTNAME
6422
6423 #if SNDRV_CARDS <= 32
6424 #define DEFAULT_ALSA_IDX ~((1 << (SNDRV_CARDS - 3)) - 1)
6425 #else
6426 #define DEFAULT_ALSA_IDX ~((1 << (32 - 3)) - 1)
6427 #endif
6428 static int alsa_index = DEFAULT_ALSA_IDX; /* last three slots */
6429 static char *alsa_id = "ThinkPadEC";
6430 static bool alsa_enable = SNDRV_DEFAULT_ENABLE1;
6431
6432 struct tpacpi_alsa_data {
6433 struct snd_card *card;
6434 struct snd_ctl_elem_id *ctl_mute_id;
6435 struct snd_ctl_elem_id *ctl_vol_id;
6436 };
6437
6438 static struct snd_card *alsa_card;
6439
6440 enum {
6441 TP_EC_AUDIO = 0x30,
6442
6443 /* TP_EC_AUDIO bits */
6444 TP_EC_AUDIO_MUTESW = 6,
6445
6446 /* TP_EC_AUDIO bitmasks */
6447 TP_EC_AUDIO_LVL_MSK = 0x0F,
6448 TP_EC_AUDIO_MUTESW_MSK = (1 << TP_EC_AUDIO_MUTESW),
6449
6450 /* Maximum volume */
6451 TP_EC_VOLUME_MAX = 14,
6452 };
6453
6454 enum tpacpi_volume_access_mode {
6455 TPACPI_VOL_MODE_AUTO = 0, /* Not implemented yet */
6456 TPACPI_VOL_MODE_EC, /* Pure EC control */
6457 TPACPI_VOL_MODE_UCMS_STEP, /* UCMS step-based control: N/A */
6458 TPACPI_VOL_MODE_ECNVRAM, /* EC control w/ NVRAM store */
6459 TPACPI_VOL_MODE_MAX
6460 };
6461
6462 enum tpacpi_volume_capabilities {
6463 TPACPI_VOL_CAP_AUTO = 0, /* Use white/blacklist */
6464 TPACPI_VOL_CAP_VOLMUTE, /* Output vol and mute */
6465 TPACPI_VOL_CAP_MUTEONLY, /* Output mute only */
6466 TPACPI_VOL_CAP_MAX
6467 };
6468
6469 static enum tpacpi_volume_access_mode volume_mode =
6470 TPACPI_VOL_MODE_MAX;
6471
6472 static enum tpacpi_volume_capabilities volume_capabilities;
6473 static bool volume_control_allowed;
6474
6475 /*
6476 * Used to syncronize writers to TP_EC_AUDIO and
6477 * TP_NVRAM_ADDR_MIXER, as we need to do read-modify-write
6478 */
6479 static struct mutex volume_mutex;
6480
6481 static void tpacpi_volume_checkpoint_nvram(void)
6482 {
6483 u8 lec = 0;
6484 u8 b_nvram;
6485 u8 ec_mask;
6486
6487 if (volume_mode != TPACPI_VOL_MODE_ECNVRAM)
6488 return;
6489 if (!volume_control_allowed)
6490 return;
6491
6492 vdbg_printk(TPACPI_DBG_MIXER,
6493 "trying to checkpoint mixer state to NVRAM...\n");
6494
6495 if (tp_features.mixer_no_level_control)
6496 ec_mask = TP_EC_AUDIO_MUTESW_MSK;
6497 else
6498 ec_mask = TP_EC_AUDIO_MUTESW_MSK | TP_EC_AUDIO_LVL_MSK;
6499
6500 if (mutex_lock_killable(&volume_mutex) < 0)
6501 return;
6502
6503 if (unlikely(!acpi_ec_read(TP_EC_AUDIO, &lec)))
6504 goto unlock;
6505 lec &= ec_mask;
6506 b_nvram = nvram_read_byte(TP_NVRAM_ADDR_MIXER);
6507
6508 if (lec != (b_nvram & ec_mask)) {
6509 /* NVRAM needs update */
6510 b_nvram &= ~ec_mask;
6511 b_nvram |= lec;
6512 nvram_write_byte(b_nvram, TP_NVRAM_ADDR_MIXER);
6513 dbg_printk(TPACPI_DBG_MIXER,
6514 "updated NVRAM mixer status to 0x%02x (0x%02x)\n",
6515 (unsigned int) lec, (unsigned int) b_nvram);
6516 } else {
6517 vdbg_printk(TPACPI_DBG_MIXER,
6518 "NVRAM mixer status already is 0x%02x (0x%02x)\n",
6519 (unsigned int) lec, (unsigned int) b_nvram);
6520 }
6521
6522 unlock:
6523 mutex_unlock(&volume_mutex);
6524 }
6525
6526 static int volume_get_status_ec(u8 *status)
6527 {
6528 u8 s;
6529
6530 if (!acpi_ec_read(TP_EC_AUDIO, &s))
6531 return -EIO;
6532
6533 *status = s;
6534
6535 dbg_printk(TPACPI_DBG_MIXER, "status 0x%02x\n", s);
6536
6537 return 0;
6538 }
6539
6540 static int volume_get_status(u8 *status)
6541 {
6542 return volume_get_status_ec(status);
6543 }
6544
6545 static int volume_set_status_ec(const u8 status)
6546 {
6547 if (!acpi_ec_write(TP_EC_AUDIO, status))
6548 return -EIO;
6549
6550 dbg_printk(TPACPI_DBG_MIXER, "set EC mixer to 0x%02x\n", status);
6551
6552 return 0;
6553 }
6554
6555 static int volume_set_status(const u8 status)
6556 {
6557 return volume_set_status_ec(status);
6558 }
6559
6560 /* returns < 0 on error, 0 on no change, 1 on change */
6561 static int __volume_set_mute_ec(const bool mute)
6562 {
6563 int rc;
6564 u8 s, n;
6565
6566 if (mutex_lock_killable(&volume_mutex) < 0)
6567 return -EINTR;
6568
6569 rc = volume_get_status_ec(&s);
6570 if (rc)
6571 goto unlock;
6572
6573 n = (mute) ? s | TP_EC_AUDIO_MUTESW_MSK :
6574 s & ~TP_EC_AUDIO_MUTESW_MSK;
6575
6576 if (n != s) {
6577 rc = volume_set_status_ec(n);
6578 if (!rc)
6579 rc = 1;
6580 }
6581
6582 unlock:
6583 mutex_unlock(&volume_mutex);
6584 return rc;
6585 }
6586
6587 static int volume_alsa_set_mute(const bool mute)
6588 {
6589 dbg_printk(TPACPI_DBG_MIXER, "ALSA: trying to %smute\n",
6590 (mute) ? "" : "un");
6591 return __volume_set_mute_ec(mute);
6592 }
6593
6594 static int volume_set_mute(const bool mute)
6595 {
6596 int rc;
6597
6598 dbg_printk(TPACPI_DBG_MIXER, "trying to %smute\n",
6599 (mute) ? "" : "un");
6600
6601 rc = __volume_set_mute_ec(mute);
6602 return (rc < 0) ? rc : 0;
6603 }
6604
6605 /* returns < 0 on error, 0 on no change, 1 on change */
6606 static int __volume_set_volume_ec(const u8 vol)
6607 {
6608 int rc;
6609 u8 s, n;
6610
6611 if (vol > TP_EC_VOLUME_MAX)
6612 return -EINVAL;
6613
6614 if (mutex_lock_killable(&volume_mutex) < 0)
6615 return -EINTR;
6616
6617 rc = volume_get_status_ec(&s);
6618 if (rc)
6619 goto unlock;
6620
6621 n = (s & ~TP_EC_AUDIO_LVL_MSK) | vol;
6622
6623 if (n != s) {
6624 rc = volume_set_status_ec(n);
6625 if (!rc)
6626 rc = 1;
6627 }
6628
6629 unlock:
6630 mutex_unlock(&volume_mutex);
6631 return rc;
6632 }
6633
6634 static int volume_alsa_set_volume(const u8 vol)
6635 {
6636 dbg_printk(TPACPI_DBG_MIXER,
6637 "ALSA: trying to set volume level to %hu\n", vol);
6638 return __volume_set_volume_ec(vol);
6639 }
6640
6641 static void volume_alsa_notify_change(void)
6642 {
6643 struct tpacpi_alsa_data *d;
6644
6645 if (alsa_card && alsa_card->private_data) {
6646 d = alsa_card->private_data;
6647 if (d->ctl_mute_id)
6648 snd_ctl_notify(alsa_card,
6649 SNDRV_CTL_EVENT_MASK_VALUE,
6650 d->ctl_mute_id);
6651 if (d->ctl_vol_id)
6652 snd_ctl_notify(alsa_card,
6653 SNDRV_CTL_EVENT_MASK_VALUE,
6654 d->ctl_vol_id);
6655 }
6656 }
6657
6658 static int volume_alsa_vol_info(struct snd_kcontrol *kcontrol,
6659 struct snd_ctl_elem_info *uinfo)
6660 {
6661 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
6662 uinfo->count = 1;
6663 uinfo->value.integer.min = 0;
6664 uinfo->value.integer.max = TP_EC_VOLUME_MAX;
6665 return 0;
6666 }
6667
6668 static int volume_alsa_vol_get(struct snd_kcontrol *kcontrol,
6669 struct snd_ctl_elem_value *ucontrol)
6670 {
6671 u8 s;
6672 int rc;
6673
6674 rc = volume_get_status(&s);
6675 if (rc < 0)
6676 return rc;
6677
6678 ucontrol->value.integer.value[0] = s & TP_EC_AUDIO_LVL_MSK;
6679 return 0;
6680 }
6681
6682 static int volume_alsa_vol_put(struct snd_kcontrol *kcontrol,
6683 struct snd_ctl_elem_value *ucontrol)
6684 {
6685 tpacpi_disclose_usertask("ALSA", "set volume to %ld\n",
6686 ucontrol->value.integer.value[0]);
6687 return volume_alsa_set_volume(ucontrol->value.integer.value[0]);
6688 }
6689
6690 #define volume_alsa_mute_info snd_ctl_boolean_mono_info
6691
6692 static int volume_alsa_mute_get(struct snd_kcontrol *kcontrol,
6693 struct snd_ctl_elem_value *ucontrol)
6694 {
6695 u8 s;
6696 int rc;
6697
6698 rc = volume_get_status(&s);
6699 if (rc < 0)
6700 return rc;
6701
6702 ucontrol->value.integer.value[0] =
6703 (s & TP_EC_AUDIO_MUTESW_MSK) ? 0 : 1;
6704 return 0;
6705 }
6706
6707 static int volume_alsa_mute_put(struct snd_kcontrol *kcontrol,
6708 struct snd_ctl_elem_value *ucontrol)
6709 {
6710 tpacpi_disclose_usertask("ALSA", "%smute\n",
6711 ucontrol->value.integer.value[0] ?
6712 "un" : "");
6713 return volume_alsa_set_mute(!ucontrol->value.integer.value[0]);
6714 }
6715
6716 static struct snd_kcontrol_new volume_alsa_control_vol = {
6717 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
6718 .name = "Console Playback Volume",
6719 .index = 0,
6720 .access = SNDRV_CTL_ELEM_ACCESS_READ,
6721 .info = volume_alsa_vol_info,
6722 .get = volume_alsa_vol_get,
6723 };
6724
6725 static struct snd_kcontrol_new volume_alsa_control_mute = {
6726 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
6727 .name = "Console Playback Switch",
6728 .index = 0,
6729 .access = SNDRV_CTL_ELEM_ACCESS_READ,
6730 .info = volume_alsa_mute_info,
6731 .get = volume_alsa_mute_get,
6732 };
6733
6734 static void volume_suspend(void)
6735 {
6736 tpacpi_volume_checkpoint_nvram();
6737 }
6738
6739 static void volume_resume(void)
6740 {
6741 volume_alsa_notify_change();
6742 }
6743
6744 static void volume_shutdown(void)
6745 {
6746 tpacpi_volume_checkpoint_nvram();
6747 }
6748
6749 static void volume_exit(void)
6750 {
6751 if (alsa_card) {
6752 snd_card_free(alsa_card);
6753 alsa_card = NULL;
6754 }
6755
6756 tpacpi_volume_checkpoint_nvram();
6757 }
6758
6759 static int __init volume_create_alsa_mixer(void)
6760 {
6761 struct snd_card *card;
6762 struct tpacpi_alsa_data *data;
6763 struct snd_kcontrol *ctl_vol;
6764 struct snd_kcontrol *ctl_mute;
6765 int rc;
6766
6767 rc = snd_card_create(alsa_index, alsa_id, THIS_MODULE,
6768 sizeof(struct tpacpi_alsa_data), &card);
6769 if (rc < 0 || !card) {
6770 pr_err("Failed to create ALSA card structures: %d\n", rc);
6771 return 1;
6772 }
6773
6774 BUG_ON(!card->private_data);
6775 data = card->private_data;
6776 data->card = card;
6777
6778 strlcpy(card->driver, TPACPI_ALSA_DRVNAME,
6779 sizeof(card->driver));
6780 strlcpy(card->shortname, TPACPI_ALSA_SHRTNAME,
6781 sizeof(card->shortname));
6782 snprintf(card->mixername, sizeof(card->mixername), "ThinkPad EC %s",
6783 (thinkpad_id.ec_version_str) ?
6784 thinkpad_id.ec_version_str : "(unknown)");
6785 snprintf(card->longname, sizeof(card->longname),
6786 "%s at EC reg 0x%02x, fw %s", card->shortname, TP_EC_AUDIO,
6787 (thinkpad_id.ec_version_str) ?
6788 thinkpad_id.ec_version_str : "unknown");
6789
6790 if (volume_control_allowed) {
6791 volume_alsa_control_vol.put = volume_alsa_vol_put;
6792 volume_alsa_control_vol.access =
6793 SNDRV_CTL_ELEM_ACCESS_READWRITE;
6794
6795 volume_alsa_control_mute.put = volume_alsa_mute_put;
6796 volume_alsa_control_mute.access =
6797 SNDRV_CTL_ELEM_ACCESS_READWRITE;
6798 }
6799
6800 if (!tp_features.mixer_no_level_control) {
6801 ctl_vol = snd_ctl_new1(&volume_alsa_control_vol, NULL);
6802 rc = snd_ctl_add(card, ctl_vol);
6803 if (rc < 0) {
6804 pr_err("Failed to create ALSA volume control: %d\n",
6805 rc);
6806 goto err_exit;
6807 }
6808 data->ctl_vol_id = &ctl_vol->id;
6809 }
6810
6811 ctl_mute = snd_ctl_new1(&volume_alsa_control_mute, NULL);
6812 rc = snd_ctl_add(card, ctl_mute);
6813 if (rc < 0) {
6814 pr_err("Failed to create ALSA mute control: %d\n", rc);
6815 goto err_exit;
6816 }
6817 data->ctl_mute_id = &ctl_mute->id;
6818
6819 snd_card_set_dev(card, &tpacpi_pdev->dev);
6820 rc = snd_card_register(card);
6821 if (rc < 0) {
6822 pr_err("Failed to register ALSA card: %d\n", rc);
6823 goto err_exit;
6824 }
6825
6826 alsa_card = card;
6827 return 0;
6828
6829 err_exit:
6830 snd_card_free(card);
6831 return 1;
6832 }
6833
6834 #define TPACPI_VOL_Q_MUTEONLY 0x0001 /* Mute-only control available */
6835 #define TPACPI_VOL_Q_LEVEL 0x0002 /* Volume control available */
6836
6837 static const struct tpacpi_quirk volume_quirk_table[] __initconst = {
6838 /* Whitelist volume level on all IBM by default */
6839 { .vendor = PCI_VENDOR_ID_IBM,
6840 .bios = TPACPI_MATCH_ANY,
6841 .ec = TPACPI_MATCH_ANY,
6842 .quirks = TPACPI_VOL_Q_LEVEL },
6843
6844 /* Lenovo models with volume control (needs confirmation) */
6845 TPACPI_QEC_LNV('7', 'C', TPACPI_VOL_Q_LEVEL), /* R60/i */
6846 TPACPI_QEC_LNV('7', 'E', TPACPI_VOL_Q_LEVEL), /* R60e/i */
6847 TPACPI_QEC_LNV('7', '9', TPACPI_VOL_Q_LEVEL), /* T60/p */
6848 TPACPI_QEC_LNV('7', 'B', TPACPI_VOL_Q_LEVEL), /* X60/s */
6849 TPACPI_QEC_LNV('7', 'J', TPACPI_VOL_Q_LEVEL), /* X60t */
6850 TPACPI_QEC_LNV('7', '7', TPACPI_VOL_Q_LEVEL), /* Z60 */
6851 TPACPI_QEC_LNV('7', 'F', TPACPI_VOL_Q_LEVEL), /* Z61 */
6852
6853 /* Whitelist mute-only on all Lenovo by default */
6854 { .vendor = PCI_VENDOR_ID_LENOVO,
6855 .bios = TPACPI_MATCH_ANY,
6856 .ec = TPACPI_MATCH_ANY,
6857 .quirks = TPACPI_VOL_Q_MUTEONLY }
6858 };
6859
6860 static int __init volume_init(struct ibm_init_struct *iibm)
6861 {
6862 unsigned long quirks;
6863 int rc;
6864
6865 vdbg_printk(TPACPI_DBG_INIT, "initializing volume subdriver\n");
6866
6867 mutex_init(&volume_mutex);
6868
6869 /*
6870 * Check for module parameter bogosity, note that we
6871 * init volume_mode to TPACPI_VOL_MODE_MAX in order to be
6872 * able to detect "unspecified"
6873 */
6874 if (volume_mode > TPACPI_VOL_MODE_MAX)
6875 return -EINVAL;
6876
6877 if (volume_mode == TPACPI_VOL_MODE_UCMS_STEP) {
6878 pr_err("UCMS step volume mode not implemented, "
6879 "please contact %s\n", TPACPI_MAIL);
6880 return 1;
6881 }
6882
6883 if (volume_capabilities >= TPACPI_VOL_CAP_MAX)
6884 return -EINVAL;
6885
6886 /*
6887 * The ALSA mixer is our primary interface.
6888 * When disabled, don't install the subdriver at all
6889 */
6890 if (!alsa_enable) {
6891 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
6892 "ALSA mixer disabled by parameter, "
6893 "not loading volume subdriver...\n");
6894 return 1;
6895 }
6896
6897 quirks = tpacpi_check_quirks(volume_quirk_table,
6898 ARRAY_SIZE(volume_quirk_table));
6899
6900 switch (volume_capabilities) {
6901 case TPACPI_VOL_CAP_AUTO:
6902 if (quirks & TPACPI_VOL_Q_MUTEONLY)
6903 tp_features.mixer_no_level_control = 1;
6904 else if (quirks & TPACPI_VOL_Q_LEVEL)
6905 tp_features.mixer_no_level_control = 0;
6906 else
6907 return 1; /* no mixer */
6908 break;
6909 case TPACPI_VOL_CAP_VOLMUTE:
6910 tp_features.mixer_no_level_control = 0;
6911 break;
6912 case TPACPI_VOL_CAP_MUTEONLY:
6913 tp_features.mixer_no_level_control = 1;
6914 break;
6915 default:
6916 return 1;
6917 }
6918
6919 if (volume_capabilities != TPACPI_VOL_CAP_AUTO)
6920 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
6921 "using user-supplied volume_capabilities=%d\n",
6922 volume_capabilities);
6923
6924 if (volume_mode == TPACPI_VOL_MODE_AUTO ||
6925 volume_mode == TPACPI_VOL_MODE_MAX) {
6926 volume_mode = TPACPI_VOL_MODE_ECNVRAM;
6927
6928 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
6929 "driver auto-selected volume_mode=%d\n",
6930 volume_mode);
6931 } else {
6932 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
6933 "using user-supplied volume_mode=%d\n",
6934 volume_mode);
6935 }
6936
6937 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
6938 "mute is supported, volume control is %s\n",
6939 str_supported(!tp_features.mixer_no_level_control));
6940
6941 rc = volume_create_alsa_mixer();
6942 if (rc) {
6943 pr_err("Could not create the ALSA mixer interface\n");
6944 return rc;
6945 }
6946
6947 pr_info("Console audio control enabled, mode: %s\n",
6948 (volume_control_allowed) ?
6949 "override (read/write)" :
6950 "monitor (read only)");
6951
6952 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
6953 "registering volume hotkeys as change notification\n");
6954 tpacpi_hotkey_driver_mask_set(hotkey_driver_mask
6955 | TP_ACPI_HKEY_VOLUP_MASK
6956 | TP_ACPI_HKEY_VOLDWN_MASK
6957 | TP_ACPI_HKEY_MUTE_MASK);
6958
6959 return 0;
6960 }
6961
6962 static int volume_read(struct seq_file *m)
6963 {
6964 u8 status;
6965
6966 if (volume_get_status(&status) < 0) {
6967 seq_printf(m, "level:\t\tunreadable\n");
6968 } else {
6969 if (tp_features.mixer_no_level_control)
6970 seq_printf(m, "level:\t\tunsupported\n");
6971 else
6972 seq_printf(m, "level:\t\t%d\n",
6973 status & TP_EC_AUDIO_LVL_MSK);
6974
6975 seq_printf(m, "mute:\t\t%s\n",
6976 onoff(status, TP_EC_AUDIO_MUTESW));
6977
6978 if (volume_control_allowed) {
6979 seq_printf(m, "commands:\tunmute, mute\n");
6980 if (!tp_features.mixer_no_level_control) {
6981 seq_printf(m,
6982 "commands:\tup, down\n");
6983 seq_printf(m,
6984 "commands:\tlevel <level>"
6985 " (<level> is 0-%d)\n",
6986 TP_EC_VOLUME_MAX);
6987 }
6988 }
6989 }
6990
6991 return 0;
6992 }
6993
6994 static int volume_write(char *buf)
6995 {
6996 u8 s;
6997 u8 new_level, new_mute;
6998 int l;
6999 char *cmd;
7000 int rc;
7001
7002 /*
7003 * We do allow volume control at driver startup, so that the
7004 * user can set initial state through the volume=... parameter hack.
7005 */
7006 if (!volume_control_allowed && tpacpi_lifecycle != TPACPI_LIFE_INIT) {
7007 if (unlikely(!tp_warned.volume_ctrl_forbidden)) {
7008 tp_warned.volume_ctrl_forbidden = 1;
7009 pr_notice("Console audio control in monitor mode, "
7010 "changes are not allowed\n");
7011 pr_notice("Use the volume_control=1 module parameter "
7012 "to enable volume control\n");
7013 }
7014 return -EPERM;
7015 }
7016
7017 rc = volume_get_status(&s);
7018 if (rc < 0)
7019 return rc;
7020
7021 new_level = s & TP_EC_AUDIO_LVL_MSK;
7022 new_mute = s & TP_EC_AUDIO_MUTESW_MSK;
7023
7024 while ((cmd = next_cmd(&buf))) {
7025 if (!tp_features.mixer_no_level_control) {
7026 if (strlencmp(cmd, "up") == 0) {
7027 if (new_mute)
7028 new_mute = 0;
7029 else if (new_level < TP_EC_VOLUME_MAX)
7030 new_level++;
7031 continue;
7032 } else if (strlencmp(cmd, "down") == 0) {
7033 if (new_mute)
7034 new_mute = 0;
7035 else if (new_level > 0)
7036 new_level--;
7037 continue;
7038 } else if (sscanf(cmd, "level %u", &l) == 1 &&
7039 l >= 0 && l <= TP_EC_VOLUME_MAX) {
7040 new_level = l;
7041 continue;
7042 }
7043 }
7044 if (strlencmp(cmd, "mute") == 0)
7045 new_mute = TP_EC_AUDIO_MUTESW_MSK;
7046 else if (strlencmp(cmd, "unmute") == 0)
7047 new_mute = 0;
7048 else
7049 return -EINVAL;
7050 }
7051
7052 if (tp_features.mixer_no_level_control) {
7053 tpacpi_disclose_usertask("procfs volume", "%smute\n",
7054 new_mute ? "" : "un");
7055 rc = volume_set_mute(!!new_mute);
7056 } else {
7057 tpacpi_disclose_usertask("procfs volume",
7058 "%smute and set level to %d\n",
7059 new_mute ? "" : "un", new_level);
7060 rc = volume_set_status(new_mute | new_level);
7061 }
7062 volume_alsa_notify_change();
7063
7064 return (rc == -EINTR) ? -ERESTARTSYS : rc;
7065 }
7066
7067 static struct ibm_struct volume_driver_data = {
7068 .name = "volume",
7069 .read = volume_read,
7070 .write = volume_write,
7071 .exit = volume_exit,
7072 .suspend = volume_suspend,
7073 .resume = volume_resume,
7074 .shutdown = volume_shutdown,
7075 };
7076
7077 #else /* !CONFIG_THINKPAD_ACPI_ALSA_SUPPORT */
7078
7079 #define alsa_card NULL
7080
7081 static void inline volume_alsa_notify_change(void)
7082 {
7083 }
7084
7085 static int __init volume_init(struct ibm_init_struct *iibm)
7086 {
7087 pr_info("volume: disabled as there is no ALSA support in this kernel\n");
7088
7089 return 1;
7090 }
7091
7092 static struct ibm_struct volume_driver_data = {
7093 .name = "volume",
7094 };
7095
7096 #endif /* CONFIG_THINKPAD_ACPI_ALSA_SUPPORT */
7097
7098 /*************************************************************************
7099 * Fan subdriver
7100 */
7101
7102 /*
7103 * FAN ACCESS MODES
7104 *
7105 * TPACPI_FAN_RD_ACPI_GFAN:
7106 * ACPI GFAN method: returns fan level
7107 *
7108 * see TPACPI_FAN_WR_ACPI_SFAN
7109 * EC 0x2f (HFSP) not available if GFAN exists
7110 *
7111 * TPACPI_FAN_WR_ACPI_SFAN:
7112 * ACPI SFAN method: sets fan level, 0 (stop) to 7 (max)
7113 *
7114 * EC 0x2f (HFSP) might be available *for reading*, but do not use
7115 * it for writing.
7116 *
7117 * TPACPI_FAN_WR_TPEC:
7118 * ThinkPad EC register 0x2f (HFSP): fan control loop mode
7119 * Supported on almost all ThinkPads
7120 *
7121 * Fan speed changes of any sort (including those caused by the
7122 * disengaged mode) are usually done slowly by the firmware as the
7123 * maximum amount of fan duty cycle change per second seems to be
7124 * limited.
7125 *
7126 * Reading is not available if GFAN exists.
7127 * Writing is not available if SFAN exists.
7128 *
7129 * Bits
7130 * 7 automatic mode engaged;
7131 * (default operation mode of the ThinkPad)
7132 * fan level is ignored in this mode.
7133 * 6 full speed mode (takes precedence over bit 7);
7134 * not available on all thinkpads. May disable
7135 * the tachometer while the fan controller ramps up
7136 * the speed (which can take up to a few *minutes*).
7137 * Speeds up fan to 100% duty-cycle, which is far above
7138 * the standard RPM levels. It is not impossible that
7139 * it could cause hardware damage.
7140 * 5-3 unused in some models. Extra bits for fan level
7141 * in others, but still useless as all values above
7142 * 7 map to the same speed as level 7 in these models.
7143 * 2-0 fan level (0..7 usually)
7144 * 0x00 = stop
7145 * 0x07 = max (set when temperatures critical)
7146 * Some ThinkPads may have other levels, see
7147 * TPACPI_FAN_WR_ACPI_FANS (X31/X40/X41)
7148 *
7149 * FIRMWARE BUG: on some models, EC 0x2f might not be initialized at
7150 * boot. Apparently the EC does not initialize it, so unless ACPI DSDT
7151 * does so, its initial value is meaningless (0x07).
7152 *
7153 * For firmware bugs, refer to:
7154 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
7155 *
7156 * ----
7157 *
7158 * ThinkPad EC register 0x84 (LSB), 0x85 (MSB):
7159 * Main fan tachometer reading (in RPM)
7160 *
7161 * This register is present on all ThinkPads with a new-style EC, and
7162 * it is known not to be present on the A21m/e, and T22, as there is
7163 * something else in offset 0x84 according to the ACPI DSDT. Other
7164 * ThinkPads from this same time period (and earlier) probably lack the
7165 * tachometer as well.
7166 *
7167 * Unfortunately a lot of ThinkPads with new-style ECs but whose firmware
7168 * was never fixed by IBM to report the EC firmware version string
7169 * probably support the tachometer (like the early X models), so
7170 * detecting it is quite hard. We need more data to know for sure.
7171 *
7172 * FIRMWARE BUG: always read 0x84 first, otherwise incorrect readings
7173 * might result.
7174 *
7175 * FIRMWARE BUG: may go stale while the EC is switching to full speed
7176 * mode.
7177 *
7178 * For firmware bugs, refer to:
7179 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
7180 *
7181 * ----
7182 *
7183 * ThinkPad EC register 0x31 bit 0 (only on select models)
7184 *
7185 * When bit 0 of EC register 0x31 is zero, the tachometer registers
7186 * show the speed of the main fan. When bit 0 of EC register 0x31
7187 * is one, the tachometer registers show the speed of the auxiliary
7188 * fan.
7189 *
7190 * Fan control seems to affect both fans, regardless of the state
7191 * of this bit.
7192 *
7193 * So far, only the firmware for the X60/X61 non-tablet versions
7194 * seem to support this (firmware TP-7M).
7195 *
7196 * TPACPI_FAN_WR_ACPI_FANS:
7197 * ThinkPad X31, X40, X41. Not available in the X60.
7198 *
7199 * FANS ACPI handle: takes three arguments: low speed, medium speed,
7200 * high speed. ACPI DSDT seems to map these three speeds to levels
7201 * as follows: STOP LOW LOW MED MED HIGH HIGH HIGH HIGH
7202 * (this map is stored on FAN0..FAN8 as "0,1,1,2,2,3,3,3,3")
7203 *
7204 * The speeds are stored on handles
7205 * (FANA:FAN9), (FANC:FANB), (FANE:FAND).
7206 *
7207 * There are three default speed sets, accessible as handles:
7208 * FS1L,FS1M,FS1H; FS2L,FS2M,FS2H; FS3L,FS3M,FS3H
7209 *
7210 * ACPI DSDT switches which set is in use depending on various
7211 * factors.
7212 *
7213 * TPACPI_FAN_WR_TPEC is also available and should be used to
7214 * command the fan. The X31/X40/X41 seems to have 8 fan levels,
7215 * but the ACPI tables just mention level 7.
7216 */
7217
7218 enum { /* Fan control constants */
7219 fan_status_offset = 0x2f, /* EC register 0x2f */
7220 fan_rpm_offset = 0x84, /* EC register 0x84: LSB, 0x85 MSB (RPM)
7221 * 0x84 must be read before 0x85 */
7222 fan_select_offset = 0x31, /* EC register 0x31 (Firmware 7M)
7223 bit 0 selects which fan is active */
7224
7225 TP_EC_FAN_FULLSPEED = 0x40, /* EC fan mode: full speed */
7226 TP_EC_FAN_AUTO = 0x80, /* EC fan mode: auto fan control */
7227
7228 TPACPI_FAN_LAST_LEVEL = 0x100, /* Use cached last-seen fan level */
7229 };
7230
7231 enum fan_status_access_mode {
7232 TPACPI_FAN_NONE = 0, /* No fan status or control */
7233 TPACPI_FAN_RD_ACPI_GFAN, /* Use ACPI GFAN */
7234 TPACPI_FAN_RD_TPEC, /* Use ACPI EC regs 0x2f, 0x84-0x85 */
7235 };
7236
7237 enum fan_control_access_mode {
7238 TPACPI_FAN_WR_NONE = 0, /* No fan control */
7239 TPACPI_FAN_WR_ACPI_SFAN, /* Use ACPI SFAN */
7240 TPACPI_FAN_WR_TPEC, /* Use ACPI EC reg 0x2f */
7241 TPACPI_FAN_WR_ACPI_FANS, /* Use ACPI FANS and EC reg 0x2f */
7242 };
7243
7244 enum fan_control_commands {
7245 TPACPI_FAN_CMD_SPEED = 0x0001, /* speed command */
7246 TPACPI_FAN_CMD_LEVEL = 0x0002, /* level command */
7247 TPACPI_FAN_CMD_ENABLE = 0x0004, /* enable/disable cmd,
7248 * and also watchdog cmd */
7249 };
7250
7251 static bool fan_control_allowed;
7252
7253 static enum fan_status_access_mode fan_status_access_mode;
7254 static enum fan_control_access_mode fan_control_access_mode;
7255 static enum fan_control_commands fan_control_commands;
7256
7257 static u8 fan_control_initial_status;
7258 static u8 fan_control_desired_level;
7259 static u8 fan_control_resume_level;
7260 static int fan_watchdog_maxinterval;
7261
7262 static struct mutex fan_mutex;
7263
7264 static void fan_watchdog_fire(struct work_struct *ignored);
7265 static DECLARE_DELAYED_WORK(fan_watchdog_task, fan_watchdog_fire);
7266
7267 TPACPI_HANDLE(fans, ec, "FANS"); /* X31, X40, X41 */
7268 TPACPI_HANDLE(gfan, ec, "GFAN", /* 570 */
7269 "\\FSPD", /* 600e/x, 770e, 770x */
7270 ); /* all others */
7271 TPACPI_HANDLE(sfan, ec, "SFAN", /* 570 */
7272 "JFNS", /* 770x-JL */
7273 ); /* all others */
7274
7275 /*
7276 * Unitialized HFSP quirk: ACPI DSDT and EC fail to initialize the
7277 * HFSP register at boot, so it contains 0x07 but the Thinkpad could
7278 * be in auto mode (0x80).
7279 *
7280 * This is corrected by any write to HFSP either by the driver, or
7281 * by the firmware.
7282 *
7283 * We assume 0x07 really means auto mode while this quirk is active,
7284 * as this is far more likely than the ThinkPad being in level 7,
7285 * which is only used by the firmware during thermal emergencies.
7286 *
7287 * Enable for TP-1Y (T43), TP-78 (R51e), TP-76 (R52),
7288 * TP-70 (T43, R52), which are known to be buggy.
7289 */
7290
7291 static void fan_quirk1_setup(void)
7292 {
7293 if (fan_control_initial_status == 0x07) {
7294 pr_notice("fan_init: initial fan status is unknown, "
7295 "assuming it is in auto mode\n");
7296 tp_features.fan_ctrl_status_undef = 1;
7297 }
7298 }
7299
7300 static void fan_quirk1_handle(u8 *fan_status)
7301 {
7302 if (unlikely(tp_features.fan_ctrl_status_undef)) {
7303 if (*fan_status != fan_control_initial_status) {
7304 /* something changed the HFSP regisnter since
7305 * driver init time, so it is not undefined
7306 * anymore */
7307 tp_features.fan_ctrl_status_undef = 0;
7308 } else {
7309 /* Return most likely status. In fact, it
7310 * might be the only possible status */
7311 *fan_status = TP_EC_FAN_AUTO;
7312 }
7313 }
7314 }
7315
7316 /* Select main fan on X60/X61, NOOP on others */
7317 static bool fan_select_fan1(void)
7318 {
7319 if (tp_features.second_fan) {
7320 u8 val;
7321
7322 if (ec_read(fan_select_offset, &val) < 0)
7323 return false;
7324 val &= 0xFEU;
7325 if (ec_write(fan_select_offset, val) < 0)
7326 return false;
7327 }
7328 return true;
7329 }
7330
7331 /* Select secondary fan on X60/X61 */
7332 static bool fan_select_fan2(void)
7333 {
7334 u8 val;
7335
7336 if (!tp_features.second_fan)
7337 return false;
7338
7339 if (ec_read(fan_select_offset, &val) < 0)
7340 return false;
7341 val |= 0x01U;
7342 if (ec_write(fan_select_offset, val) < 0)
7343 return false;
7344
7345 return true;
7346 }
7347
7348 /*
7349 * Call with fan_mutex held
7350 */
7351 static void fan_update_desired_level(u8 status)
7352 {
7353 if ((status &
7354 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
7355 if (status > 7)
7356 fan_control_desired_level = 7;
7357 else
7358 fan_control_desired_level = status;
7359 }
7360 }
7361
7362 static int fan_get_status(u8 *status)
7363 {
7364 u8 s;
7365
7366 /* TODO:
7367 * Add TPACPI_FAN_RD_ACPI_FANS ? */
7368
7369 switch (fan_status_access_mode) {
7370 case TPACPI_FAN_RD_ACPI_GFAN: {
7371 /* 570, 600e/x, 770e, 770x */
7372 int res;
7373
7374 if (unlikely(!acpi_evalf(gfan_handle, &res, NULL, "d")))
7375 return -EIO;
7376
7377 if (likely(status))
7378 *status = res & 0x07;
7379
7380 break;
7381 }
7382 case TPACPI_FAN_RD_TPEC:
7383 /* all except 570, 600e/x, 770e, 770x */
7384 if (unlikely(!acpi_ec_read(fan_status_offset, &s)))
7385 return -EIO;
7386
7387 if (likely(status)) {
7388 *status = s;
7389 fan_quirk1_handle(status);
7390 }
7391
7392 break;
7393
7394 default:
7395 return -ENXIO;
7396 }
7397
7398 return 0;
7399 }
7400
7401 static int fan_get_status_safe(u8 *status)
7402 {
7403 int rc;
7404 u8 s;
7405
7406 if (mutex_lock_killable(&fan_mutex))
7407 return -ERESTARTSYS;
7408 rc = fan_get_status(&s);
7409 if (!rc)
7410 fan_update_desired_level(s);
7411 mutex_unlock(&fan_mutex);
7412
7413 if (status)
7414 *status = s;
7415
7416 return rc;
7417 }
7418
7419 static int fan_get_speed(unsigned int *speed)
7420 {
7421 u8 hi, lo;
7422
7423 switch (fan_status_access_mode) {
7424 case TPACPI_FAN_RD_TPEC:
7425 /* all except 570, 600e/x, 770e, 770x */
7426 if (unlikely(!fan_select_fan1()))
7427 return -EIO;
7428 if (unlikely(!acpi_ec_read(fan_rpm_offset, &lo) ||
7429 !acpi_ec_read(fan_rpm_offset + 1, &hi)))
7430 return -EIO;
7431
7432 if (likely(speed))
7433 *speed = (hi << 8) | lo;
7434
7435 break;
7436
7437 default:
7438 return -ENXIO;
7439 }
7440
7441 return 0;
7442 }
7443
7444 static int fan2_get_speed(unsigned int *speed)
7445 {
7446 u8 hi, lo;
7447 bool rc;
7448
7449 switch (fan_status_access_mode) {
7450 case TPACPI_FAN_RD_TPEC:
7451 /* all except 570, 600e/x, 770e, 770x */
7452 if (unlikely(!fan_select_fan2()))
7453 return -EIO;
7454 rc = !acpi_ec_read(fan_rpm_offset, &lo) ||
7455 !acpi_ec_read(fan_rpm_offset + 1, &hi);
7456 fan_select_fan1(); /* play it safe */
7457 if (rc)
7458 return -EIO;
7459
7460 if (likely(speed))
7461 *speed = (hi << 8) | lo;
7462
7463 break;
7464
7465 default:
7466 return -ENXIO;
7467 }
7468
7469 return 0;
7470 }
7471
7472 static int fan_set_level(int level)
7473 {
7474 if (!fan_control_allowed)
7475 return -EPERM;
7476
7477 switch (fan_control_access_mode) {
7478 case TPACPI_FAN_WR_ACPI_SFAN:
7479 if (level >= 0 && level <= 7) {
7480 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", level))
7481 return -EIO;
7482 } else
7483 return -EINVAL;
7484 break;
7485
7486 case TPACPI_FAN_WR_ACPI_FANS:
7487 case TPACPI_FAN_WR_TPEC:
7488 if (!(level & TP_EC_FAN_AUTO) &&
7489 !(level & TP_EC_FAN_FULLSPEED) &&
7490 ((level < 0) || (level > 7)))
7491 return -EINVAL;
7492
7493 /* safety net should the EC not support AUTO
7494 * or FULLSPEED mode bits and just ignore them */
7495 if (level & TP_EC_FAN_FULLSPEED)
7496 level |= 7; /* safety min speed 7 */
7497 else if (level & TP_EC_FAN_AUTO)
7498 level |= 4; /* safety min speed 4 */
7499
7500 if (!acpi_ec_write(fan_status_offset, level))
7501 return -EIO;
7502 else
7503 tp_features.fan_ctrl_status_undef = 0;
7504 break;
7505
7506 default:
7507 return -ENXIO;
7508 }
7509
7510 vdbg_printk(TPACPI_DBG_FAN,
7511 "fan control: set fan control register to 0x%02x\n", level);
7512 return 0;
7513 }
7514
7515 static int fan_set_level_safe(int level)
7516 {
7517 int rc;
7518
7519 if (!fan_control_allowed)
7520 return -EPERM;
7521
7522 if (mutex_lock_killable(&fan_mutex))
7523 return -ERESTARTSYS;
7524
7525 if (level == TPACPI_FAN_LAST_LEVEL)
7526 level = fan_control_desired_level;
7527
7528 rc = fan_set_level(level);
7529 if (!rc)
7530 fan_update_desired_level(level);
7531
7532 mutex_unlock(&fan_mutex);
7533 return rc;
7534 }
7535
7536 static int fan_set_enable(void)
7537 {
7538 u8 s;
7539 int rc;
7540
7541 if (!fan_control_allowed)
7542 return -EPERM;
7543
7544 if (mutex_lock_killable(&fan_mutex))
7545 return -ERESTARTSYS;
7546
7547 switch (fan_control_access_mode) {
7548 case TPACPI_FAN_WR_ACPI_FANS:
7549 case TPACPI_FAN_WR_TPEC:
7550 rc = fan_get_status(&s);
7551 if (rc < 0)
7552 break;
7553
7554 /* Don't go out of emergency fan mode */
7555 if (s != 7) {
7556 s &= 0x07;
7557 s |= TP_EC_FAN_AUTO | 4; /* min fan speed 4 */
7558 }
7559
7560 if (!acpi_ec_write(fan_status_offset, s))
7561 rc = -EIO;
7562 else {
7563 tp_features.fan_ctrl_status_undef = 0;
7564 rc = 0;
7565 }
7566 break;
7567
7568 case TPACPI_FAN_WR_ACPI_SFAN:
7569 rc = fan_get_status(&s);
7570 if (rc < 0)
7571 break;
7572
7573 s &= 0x07;
7574
7575 /* Set fan to at least level 4 */
7576 s |= 4;
7577
7578 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", s))
7579 rc = -EIO;
7580 else
7581 rc = 0;
7582 break;
7583
7584 default:
7585 rc = -ENXIO;
7586 }
7587
7588 mutex_unlock(&fan_mutex);
7589
7590 if (!rc)
7591 vdbg_printk(TPACPI_DBG_FAN,
7592 "fan control: set fan control register to 0x%02x\n",
7593 s);
7594 return rc;
7595 }
7596
7597 static int fan_set_disable(void)
7598 {
7599 int rc;
7600
7601 if (!fan_control_allowed)
7602 return -EPERM;
7603
7604 if (mutex_lock_killable(&fan_mutex))
7605 return -ERESTARTSYS;
7606
7607 rc = 0;
7608 switch (fan_control_access_mode) {
7609 case TPACPI_FAN_WR_ACPI_FANS:
7610 case TPACPI_FAN_WR_TPEC:
7611 if (!acpi_ec_write(fan_status_offset, 0x00))
7612 rc = -EIO;
7613 else {
7614 fan_control_desired_level = 0;
7615 tp_features.fan_ctrl_status_undef = 0;
7616 }
7617 break;
7618
7619 case TPACPI_FAN_WR_ACPI_SFAN:
7620 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", 0x00))
7621 rc = -EIO;
7622 else
7623 fan_control_desired_level = 0;
7624 break;
7625
7626 default:
7627 rc = -ENXIO;
7628 }
7629
7630 if (!rc)
7631 vdbg_printk(TPACPI_DBG_FAN,
7632 "fan control: set fan control register to 0\n");
7633
7634 mutex_unlock(&fan_mutex);
7635 return rc;
7636 }
7637
7638 static int fan_set_speed(int speed)
7639 {
7640 int rc;
7641
7642 if (!fan_control_allowed)
7643 return -EPERM;
7644
7645 if (mutex_lock_killable(&fan_mutex))
7646 return -ERESTARTSYS;
7647
7648 rc = 0;
7649 switch (fan_control_access_mode) {
7650 case TPACPI_FAN_WR_ACPI_FANS:
7651 if (speed >= 0 && speed <= 65535) {
7652 if (!acpi_evalf(fans_handle, NULL, NULL, "vddd",
7653 speed, speed, speed))
7654 rc = -EIO;
7655 } else
7656 rc = -EINVAL;
7657 break;
7658
7659 default:
7660 rc = -ENXIO;
7661 }
7662
7663 mutex_unlock(&fan_mutex);
7664 return rc;
7665 }
7666
7667 static void fan_watchdog_reset(void)
7668 {
7669 if (fan_control_access_mode == TPACPI_FAN_WR_NONE)
7670 return;
7671
7672 if (fan_watchdog_maxinterval > 0 &&
7673 tpacpi_lifecycle != TPACPI_LIFE_EXITING)
7674 mod_delayed_work(tpacpi_wq, &fan_watchdog_task,
7675 msecs_to_jiffies(fan_watchdog_maxinterval * 1000));
7676 else
7677 cancel_delayed_work(&fan_watchdog_task);
7678 }
7679
7680 static void fan_watchdog_fire(struct work_struct *ignored)
7681 {
7682 int rc;
7683
7684 if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
7685 return;
7686
7687 pr_notice("fan watchdog: enabling fan\n");
7688 rc = fan_set_enable();
7689 if (rc < 0) {
7690 pr_err("fan watchdog: error %d while enabling fan, "
7691 "will try again later...\n", -rc);
7692 /* reschedule for later */
7693 fan_watchdog_reset();
7694 }
7695 }
7696
7697 /*
7698 * SYSFS fan layout: hwmon compatible (device)
7699 *
7700 * pwm*_enable:
7701 * 0: "disengaged" mode
7702 * 1: manual mode
7703 * 2: native EC "auto" mode (recommended, hardware default)
7704 *
7705 * pwm*: set speed in manual mode, ignored otherwise.
7706 * 0 is level 0; 255 is level 7. Intermediate points done with linear
7707 * interpolation.
7708 *
7709 * fan*_input: tachometer reading, RPM
7710 *
7711 *
7712 * SYSFS fan layout: extensions
7713 *
7714 * fan_watchdog (driver):
7715 * fan watchdog interval in seconds, 0 disables (default), max 120
7716 */
7717
7718 /* sysfs fan pwm1_enable ----------------------------------------------- */
7719 static ssize_t fan_pwm1_enable_show(struct device *dev,
7720 struct device_attribute *attr,
7721 char *buf)
7722 {
7723 int res, mode;
7724 u8 status;
7725
7726 res = fan_get_status_safe(&status);
7727 if (res)
7728 return res;
7729
7730 if (status & TP_EC_FAN_FULLSPEED) {
7731 mode = 0;
7732 } else if (status & TP_EC_FAN_AUTO) {
7733 mode = 2;
7734 } else
7735 mode = 1;
7736
7737 return snprintf(buf, PAGE_SIZE, "%d\n", mode);
7738 }
7739
7740 static ssize_t fan_pwm1_enable_store(struct device *dev,
7741 struct device_attribute *attr,
7742 const char *buf, size_t count)
7743 {
7744 unsigned long t;
7745 int res, level;
7746
7747 if (parse_strtoul(buf, 2, &t))
7748 return -EINVAL;
7749
7750 tpacpi_disclose_usertask("hwmon pwm1_enable",
7751 "set fan mode to %lu\n", t);
7752
7753 switch (t) {
7754 case 0:
7755 level = TP_EC_FAN_FULLSPEED;
7756 break;
7757 case 1:
7758 level = TPACPI_FAN_LAST_LEVEL;
7759 break;
7760 case 2:
7761 level = TP_EC_FAN_AUTO;
7762 break;
7763 case 3:
7764 /* reserved for software-controlled auto mode */
7765 return -ENOSYS;
7766 default:
7767 return -EINVAL;
7768 }
7769
7770 res = fan_set_level_safe(level);
7771 if (res == -ENXIO)
7772 return -EINVAL;
7773 else if (res < 0)
7774 return res;
7775
7776 fan_watchdog_reset();
7777
7778 return count;
7779 }
7780
7781 static struct device_attribute dev_attr_fan_pwm1_enable =
7782 __ATTR(pwm1_enable, S_IWUSR | S_IRUGO,
7783 fan_pwm1_enable_show, fan_pwm1_enable_store);
7784
7785 /* sysfs fan pwm1 ------------------------------------------------------ */
7786 static ssize_t fan_pwm1_show(struct device *dev,
7787 struct device_attribute *attr,
7788 char *buf)
7789 {
7790 int res;
7791 u8 status;
7792
7793 res = fan_get_status_safe(&status);
7794 if (res)
7795 return res;
7796
7797 if ((status &
7798 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) != 0)
7799 status = fan_control_desired_level;
7800
7801 if (status > 7)
7802 status = 7;
7803
7804 return snprintf(buf, PAGE_SIZE, "%u\n", (status * 255) / 7);
7805 }
7806
7807 static ssize_t fan_pwm1_store(struct device *dev,
7808 struct device_attribute *attr,
7809 const char *buf, size_t count)
7810 {
7811 unsigned long s;
7812 int rc;
7813 u8 status, newlevel;
7814
7815 if (parse_strtoul(buf, 255, &s))
7816 return -EINVAL;
7817
7818 tpacpi_disclose_usertask("hwmon pwm1",
7819 "set fan speed to %lu\n", s);
7820
7821 /* scale down from 0-255 to 0-7 */
7822 newlevel = (s >> 5) & 0x07;
7823
7824 if (mutex_lock_killable(&fan_mutex))
7825 return -ERESTARTSYS;
7826
7827 rc = fan_get_status(&status);
7828 if (!rc && (status &
7829 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
7830 rc = fan_set_level(newlevel);
7831 if (rc == -ENXIO)
7832 rc = -EINVAL;
7833 else if (!rc) {
7834 fan_update_desired_level(newlevel);
7835 fan_watchdog_reset();
7836 }
7837 }
7838
7839 mutex_unlock(&fan_mutex);
7840 return (rc)? rc : count;
7841 }
7842
7843 static struct device_attribute dev_attr_fan_pwm1 =
7844 __ATTR(pwm1, S_IWUSR | S_IRUGO,
7845 fan_pwm1_show, fan_pwm1_store);
7846
7847 /* sysfs fan fan1_input ------------------------------------------------ */
7848 static ssize_t fan_fan1_input_show(struct device *dev,
7849 struct device_attribute *attr,
7850 char *buf)
7851 {
7852 int res;
7853 unsigned int speed;
7854
7855 res = fan_get_speed(&speed);
7856 if (res < 0)
7857 return res;
7858
7859 return snprintf(buf, PAGE_SIZE, "%u\n", speed);
7860 }
7861
7862 static struct device_attribute dev_attr_fan_fan1_input =
7863 __ATTR(fan1_input, S_IRUGO,
7864 fan_fan1_input_show, NULL);
7865
7866 /* sysfs fan fan2_input ------------------------------------------------ */
7867 static ssize_t fan_fan2_input_show(struct device *dev,
7868 struct device_attribute *attr,
7869 char *buf)
7870 {
7871 int res;
7872 unsigned int speed;
7873
7874 res = fan2_get_speed(&speed);
7875 if (res < 0)
7876 return res;
7877
7878 return snprintf(buf, PAGE_SIZE, "%u\n", speed);
7879 }
7880
7881 static struct device_attribute dev_attr_fan_fan2_input =
7882 __ATTR(fan2_input, S_IRUGO,
7883 fan_fan2_input_show, NULL);
7884
7885 /* sysfs fan fan_watchdog (hwmon driver) ------------------------------- */
7886 static ssize_t fan_fan_watchdog_show(struct device_driver *drv,
7887 char *buf)
7888 {
7889 return snprintf(buf, PAGE_SIZE, "%u\n", fan_watchdog_maxinterval);
7890 }
7891
7892 static ssize_t fan_fan_watchdog_store(struct device_driver *drv,
7893 const char *buf, size_t count)
7894 {
7895 unsigned long t;
7896
7897 if (parse_strtoul(buf, 120, &t))
7898 return -EINVAL;
7899
7900 if (!fan_control_allowed)
7901 return -EPERM;
7902
7903 fan_watchdog_maxinterval = t;
7904 fan_watchdog_reset();
7905
7906 tpacpi_disclose_usertask("fan_watchdog", "set to %lu\n", t);
7907
7908 return count;
7909 }
7910
7911 static DRIVER_ATTR(fan_watchdog, S_IWUSR | S_IRUGO,
7912 fan_fan_watchdog_show, fan_fan_watchdog_store);
7913
7914 /* --------------------------------------------------------------------- */
7915 static struct attribute *fan_attributes[] = {
7916 &dev_attr_fan_pwm1_enable.attr, &dev_attr_fan_pwm1.attr,
7917 &dev_attr_fan_fan1_input.attr,
7918 NULL, /* for fan2_input */
7919 NULL
7920 };
7921
7922 static const struct attribute_group fan_attr_group = {
7923 .attrs = fan_attributes,
7924 };
7925
7926 #define TPACPI_FAN_Q1 0x0001 /* Unitialized HFSP */
7927 #define TPACPI_FAN_2FAN 0x0002 /* EC 0x31 bit 0 selects fan2 */
7928
7929 #define TPACPI_FAN_QI(__id1, __id2, __quirks) \
7930 { .vendor = PCI_VENDOR_ID_IBM, \
7931 .bios = TPACPI_MATCH_ANY, \
7932 .ec = TPID(__id1, __id2), \
7933 .quirks = __quirks }
7934
7935 #define TPACPI_FAN_QL(__id1, __id2, __quirks) \
7936 { .vendor = PCI_VENDOR_ID_LENOVO, \
7937 .bios = TPACPI_MATCH_ANY, \
7938 .ec = TPID(__id1, __id2), \
7939 .quirks = __quirks }
7940
7941 static const struct tpacpi_quirk fan_quirk_table[] __initconst = {
7942 TPACPI_FAN_QI('1', 'Y', TPACPI_FAN_Q1),
7943 TPACPI_FAN_QI('7', '8', TPACPI_FAN_Q1),
7944 TPACPI_FAN_QI('7', '6', TPACPI_FAN_Q1),
7945 TPACPI_FAN_QI('7', '0', TPACPI_FAN_Q1),
7946 TPACPI_FAN_QL('7', 'M', TPACPI_FAN_2FAN),
7947 };
7948
7949 #undef TPACPI_FAN_QL
7950 #undef TPACPI_FAN_QI
7951
7952 static int __init fan_init(struct ibm_init_struct *iibm)
7953 {
7954 int rc;
7955 unsigned long quirks;
7956
7957 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
7958 "initializing fan subdriver\n");
7959
7960 mutex_init(&fan_mutex);
7961 fan_status_access_mode = TPACPI_FAN_NONE;
7962 fan_control_access_mode = TPACPI_FAN_WR_NONE;
7963 fan_control_commands = 0;
7964 fan_watchdog_maxinterval = 0;
7965 tp_features.fan_ctrl_status_undef = 0;
7966 tp_features.second_fan = 0;
7967 fan_control_desired_level = 7;
7968
7969 if (tpacpi_is_ibm()) {
7970 TPACPI_ACPIHANDLE_INIT(fans);
7971 TPACPI_ACPIHANDLE_INIT(gfan);
7972 TPACPI_ACPIHANDLE_INIT(sfan);
7973 }
7974
7975 quirks = tpacpi_check_quirks(fan_quirk_table,
7976 ARRAY_SIZE(fan_quirk_table));
7977
7978 if (gfan_handle) {
7979 /* 570, 600e/x, 770e, 770x */
7980 fan_status_access_mode = TPACPI_FAN_RD_ACPI_GFAN;
7981 } else {
7982 /* all other ThinkPads: note that even old-style
7983 * ThinkPad ECs supports the fan control register */
7984 if (likely(acpi_ec_read(fan_status_offset,
7985 &fan_control_initial_status))) {
7986 fan_status_access_mode = TPACPI_FAN_RD_TPEC;
7987 if (quirks & TPACPI_FAN_Q1)
7988 fan_quirk1_setup();
7989 if (quirks & TPACPI_FAN_2FAN) {
7990 tp_features.second_fan = 1;
7991 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
7992 "secondary fan support enabled\n");
7993 }
7994 } else {
7995 pr_err("ThinkPad ACPI EC access misbehaving, "
7996 "fan status and control unavailable\n");
7997 return 1;
7998 }
7999 }
8000
8001 if (sfan_handle) {
8002 /* 570, 770x-JL */
8003 fan_control_access_mode = TPACPI_FAN_WR_ACPI_SFAN;
8004 fan_control_commands |=
8005 TPACPI_FAN_CMD_LEVEL | TPACPI_FAN_CMD_ENABLE;
8006 } else {
8007 if (!gfan_handle) {
8008 /* gfan without sfan means no fan control */
8009 /* all other models implement TP EC 0x2f control */
8010
8011 if (fans_handle) {
8012 /* X31, X40, X41 */
8013 fan_control_access_mode =
8014 TPACPI_FAN_WR_ACPI_FANS;
8015 fan_control_commands |=
8016 TPACPI_FAN_CMD_SPEED |
8017 TPACPI_FAN_CMD_LEVEL |
8018 TPACPI_FAN_CMD_ENABLE;
8019 } else {
8020 fan_control_access_mode = TPACPI_FAN_WR_TPEC;
8021 fan_control_commands |=
8022 TPACPI_FAN_CMD_LEVEL |
8023 TPACPI_FAN_CMD_ENABLE;
8024 }
8025 }
8026 }
8027
8028 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
8029 "fan is %s, modes %d, %d\n",
8030 str_supported(fan_status_access_mode != TPACPI_FAN_NONE ||
8031 fan_control_access_mode != TPACPI_FAN_WR_NONE),
8032 fan_status_access_mode, fan_control_access_mode);
8033
8034 /* fan control master switch */
8035 if (!fan_control_allowed) {
8036 fan_control_access_mode = TPACPI_FAN_WR_NONE;
8037 fan_control_commands = 0;
8038 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
8039 "fan control features disabled by parameter\n");
8040 }
8041
8042 /* update fan_control_desired_level */
8043 if (fan_status_access_mode != TPACPI_FAN_NONE)
8044 fan_get_status_safe(NULL);
8045
8046 if (fan_status_access_mode != TPACPI_FAN_NONE ||
8047 fan_control_access_mode != TPACPI_FAN_WR_NONE) {
8048 if (tp_features.second_fan) {
8049 /* attach second fan tachometer */
8050 fan_attributes[ARRAY_SIZE(fan_attributes)-2] =
8051 &dev_attr_fan_fan2_input.attr;
8052 }
8053 rc = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
8054 &fan_attr_group);
8055 if (rc < 0)
8056 return rc;
8057
8058 rc = driver_create_file(&tpacpi_hwmon_pdriver.driver,
8059 &driver_attr_fan_watchdog);
8060 if (rc < 0) {
8061 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
8062 &fan_attr_group);
8063 return rc;
8064 }
8065 return 0;
8066 } else
8067 return 1;
8068 }
8069
8070 static void fan_exit(void)
8071 {
8072 vdbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_FAN,
8073 "cancelling any pending fan watchdog tasks\n");
8074
8075 /* FIXME: can we really do this unconditionally? */
8076 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj, &fan_attr_group);
8077 driver_remove_file(&tpacpi_hwmon_pdriver.driver,
8078 &driver_attr_fan_watchdog);
8079
8080 cancel_delayed_work(&fan_watchdog_task);
8081 flush_workqueue(tpacpi_wq);
8082 }
8083
8084 static void fan_suspend(void)
8085 {
8086 int rc;
8087
8088 if (!fan_control_allowed)
8089 return;
8090
8091 /* Store fan status in cache */
8092 fan_control_resume_level = 0;
8093 rc = fan_get_status_safe(&fan_control_resume_level);
8094 if (rc < 0)
8095 pr_notice("failed to read fan level for later "
8096 "restore during resume: %d\n", rc);
8097
8098 /* if it is undefined, don't attempt to restore it.
8099 * KEEP THIS LAST */
8100 if (tp_features.fan_ctrl_status_undef)
8101 fan_control_resume_level = 0;
8102 }
8103
8104 static void fan_resume(void)
8105 {
8106 u8 current_level = 7;
8107 bool do_set = false;
8108 int rc;
8109
8110 /* DSDT *always* updates status on resume */
8111 tp_features.fan_ctrl_status_undef = 0;
8112
8113 if (!fan_control_allowed ||
8114 !fan_control_resume_level ||
8115 (fan_get_status_safe(&current_level) < 0))
8116 return;
8117
8118 switch (fan_control_access_mode) {
8119 case TPACPI_FAN_WR_ACPI_SFAN:
8120 /* never decrease fan level */
8121 do_set = (fan_control_resume_level > current_level);
8122 break;
8123 case TPACPI_FAN_WR_ACPI_FANS:
8124 case TPACPI_FAN_WR_TPEC:
8125 /* never decrease fan level, scale is:
8126 * TP_EC_FAN_FULLSPEED > 7 >= TP_EC_FAN_AUTO
8127 *
8128 * We expect the firmware to set either 7 or AUTO, but we
8129 * handle FULLSPEED out of paranoia.
8130 *
8131 * So, we can safely only restore FULLSPEED or 7, anything
8132 * else could slow the fan. Restoring AUTO is useless, at
8133 * best that's exactly what the DSDT already set (it is the
8134 * slower it uses).
8135 *
8136 * Always keep in mind that the DSDT *will* have set the
8137 * fans to what the vendor supposes is the best level. We
8138 * muck with it only to speed the fan up.
8139 */
8140 if (fan_control_resume_level != 7 &&
8141 !(fan_control_resume_level & TP_EC_FAN_FULLSPEED))
8142 return;
8143 else
8144 do_set = !(current_level & TP_EC_FAN_FULLSPEED) &&
8145 (current_level != fan_control_resume_level);
8146 break;
8147 default:
8148 return;
8149 }
8150 if (do_set) {
8151 pr_notice("restoring fan level to 0x%02x\n",
8152 fan_control_resume_level);
8153 rc = fan_set_level_safe(fan_control_resume_level);
8154 if (rc < 0)
8155 pr_notice("failed to restore fan level: %d\n", rc);
8156 }
8157 }
8158
8159 static int fan_read(struct seq_file *m)
8160 {
8161 int rc;
8162 u8 status;
8163 unsigned int speed = 0;
8164
8165 switch (fan_status_access_mode) {
8166 case TPACPI_FAN_RD_ACPI_GFAN:
8167 /* 570, 600e/x, 770e, 770x */
8168 rc = fan_get_status_safe(&status);
8169 if (rc < 0)
8170 return rc;
8171
8172 seq_printf(m, "status:\t\t%s\n"
8173 "level:\t\t%d\n",
8174 (status != 0) ? "enabled" : "disabled", status);
8175 break;
8176
8177 case TPACPI_FAN_RD_TPEC:
8178 /* all except 570, 600e/x, 770e, 770x */
8179 rc = fan_get_status_safe(&status);
8180 if (rc < 0)
8181 return rc;
8182
8183 seq_printf(m, "status:\t\t%s\n",
8184 (status != 0) ? "enabled" : "disabled");
8185
8186 rc = fan_get_speed(&speed);
8187 if (rc < 0)
8188 return rc;
8189
8190 seq_printf(m, "speed:\t\t%d\n", speed);
8191
8192 if (status & TP_EC_FAN_FULLSPEED)
8193 /* Disengaged mode takes precedence */
8194 seq_printf(m, "level:\t\tdisengaged\n");
8195 else if (status & TP_EC_FAN_AUTO)
8196 seq_printf(m, "level:\t\tauto\n");
8197 else
8198 seq_printf(m, "level:\t\t%d\n", status);
8199 break;
8200
8201 case TPACPI_FAN_NONE:
8202 default:
8203 seq_printf(m, "status:\t\tnot supported\n");
8204 }
8205
8206 if (fan_control_commands & TPACPI_FAN_CMD_LEVEL) {
8207 seq_printf(m, "commands:\tlevel <level>");
8208
8209 switch (fan_control_access_mode) {
8210 case TPACPI_FAN_WR_ACPI_SFAN:
8211 seq_printf(m, " (<level> is 0-7)\n");
8212 break;
8213
8214 default:
8215 seq_printf(m, " (<level> is 0-7, "
8216 "auto, disengaged, full-speed)\n");
8217 break;
8218 }
8219 }
8220
8221 if (fan_control_commands & TPACPI_FAN_CMD_ENABLE)
8222 seq_printf(m, "commands:\tenable, disable\n"
8223 "commands:\twatchdog <timeout> (<timeout> "
8224 "is 0 (off), 1-120 (seconds))\n");
8225
8226 if (fan_control_commands & TPACPI_FAN_CMD_SPEED)
8227 seq_printf(m, "commands:\tspeed <speed>"
8228 " (<speed> is 0-65535)\n");
8229
8230 return 0;
8231 }
8232
8233 static int fan_write_cmd_level(const char *cmd, int *rc)
8234 {
8235 int level;
8236
8237 if (strlencmp(cmd, "level auto") == 0)
8238 level = TP_EC_FAN_AUTO;
8239 else if ((strlencmp(cmd, "level disengaged") == 0) |
8240 (strlencmp(cmd, "level full-speed") == 0))
8241 level = TP_EC_FAN_FULLSPEED;
8242 else if (sscanf(cmd, "level %d", &level) != 1)
8243 return 0;
8244
8245 *rc = fan_set_level_safe(level);
8246 if (*rc == -ENXIO)
8247 pr_err("level command accepted for unsupported access mode %d\n",
8248 fan_control_access_mode);
8249 else if (!*rc)
8250 tpacpi_disclose_usertask("procfs fan",
8251 "set level to %d\n", level);
8252
8253 return 1;
8254 }
8255
8256 static int fan_write_cmd_enable(const char *cmd, int *rc)
8257 {
8258 if (strlencmp(cmd, "enable") != 0)
8259 return 0;
8260
8261 *rc = fan_set_enable();
8262 if (*rc == -ENXIO)
8263 pr_err("enable command accepted for unsupported access mode %d\n",
8264 fan_control_access_mode);
8265 else if (!*rc)
8266 tpacpi_disclose_usertask("procfs fan", "enable\n");
8267
8268 return 1;
8269 }
8270
8271 static int fan_write_cmd_disable(const char *cmd, int *rc)
8272 {
8273 if (strlencmp(cmd, "disable") != 0)
8274 return 0;
8275
8276 *rc = fan_set_disable();
8277 if (*rc == -ENXIO)
8278 pr_err("disable command accepted for unsupported access mode %d\n",
8279 fan_control_access_mode);
8280 else if (!*rc)
8281 tpacpi_disclose_usertask("procfs fan", "disable\n");
8282
8283 return 1;
8284 }
8285
8286 static int fan_write_cmd_speed(const char *cmd, int *rc)
8287 {
8288 int speed;
8289
8290 /* TODO:
8291 * Support speed <low> <medium> <high> ? */
8292
8293 if (sscanf(cmd, "speed %d", &speed) != 1)
8294 return 0;
8295
8296 *rc = fan_set_speed(speed);
8297 if (*rc == -ENXIO)
8298 pr_err("speed command accepted for unsupported access mode %d\n",
8299 fan_control_access_mode);
8300 else if (!*rc)
8301 tpacpi_disclose_usertask("procfs fan",
8302 "set speed to %d\n", speed);
8303
8304 return 1;
8305 }
8306
8307 static int fan_write_cmd_watchdog(const char *cmd, int *rc)
8308 {
8309 int interval;
8310
8311 if (sscanf(cmd, "watchdog %d", &interval) != 1)
8312 return 0;
8313
8314 if (interval < 0 || interval > 120)
8315 *rc = -EINVAL;
8316 else {
8317 fan_watchdog_maxinterval = interval;
8318 tpacpi_disclose_usertask("procfs fan",
8319 "set watchdog timer to %d\n",
8320 interval);
8321 }
8322
8323 return 1;
8324 }
8325
8326 static int fan_write(char *buf)
8327 {
8328 char *cmd;
8329 int rc = 0;
8330
8331 while (!rc && (cmd = next_cmd(&buf))) {
8332 if (!((fan_control_commands & TPACPI_FAN_CMD_LEVEL) &&
8333 fan_write_cmd_level(cmd, &rc)) &&
8334 !((fan_control_commands & TPACPI_FAN_CMD_ENABLE) &&
8335 (fan_write_cmd_enable(cmd, &rc) ||
8336 fan_write_cmd_disable(cmd, &rc) ||
8337 fan_write_cmd_watchdog(cmd, &rc))) &&
8338 !((fan_control_commands & TPACPI_FAN_CMD_SPEED) &&
8339 fan_write_cmd_speed(cmd, &rc))
8340 )
8341 rc = -EINVAL;
8342 else if (!rc)
8343 fan_watchdog_reset();
8344 }
8345
8346 return rc;
8347 }
8348
8349 static struct ibm_struct fan_driver_data = {
8350 .name = "fan",
8351 .read = fan_read,
8352 .write = fan_write,
8353 .exit = fan_exit,
8354 .suspend = fan_suspend,
8355 .resume = fan_resume,
8356 };
8357
8358 /****************************************************************************
8359 ****************************************************************************
8360 *
8361 * Infrastructure
8362 *
8363 ****************************************************************************
8364 ****************************************************************************/
8365
8366 /*
8367 * HKEY event callout for other subdrivers go here
8368 * (yes, it is ugly, but it is quick, safe, and gets the job done
8369 */
8370 static void tpacpi_driver_event(const unsigned int hkey_event)
8371 {
8372 if (ibm_backlight_device) {
8373 switch (hkey_event) {
8374 case TP_HKEY_EV_BRGHT_UP:
8375 case TP_HKEY_EV_BRGHT_DOWN:
8376 tpacpi_brightness_notify_change();
8377 }
8378 }
8379 if (alsa_card) {
8380 switch (hkey_event) {
8381 case TP_HKEY_EV_VOL_UP:
8382 case TP_HKEY_EV_VOL_DOWN:
8383 case TP_HKEY_EV_VOL_MUTE:
8384 volume_alsa_notify_change();
8385 }
8386 }
8387 }
8388
8389 static void hotkey_driver_event(const unsigned int scancode)
8390 {
8391 tpacpi_driver_event(TP_HKEY_EV_HOTKEY_BASE + scancode);
8392 }
8393
8394 /* sysfs name ---------------------------------------------------------- */
8395 static ssize_t thinkpad_acpi_pdev_name_show(struct device *dev,
8396 struct device_attribute *attr,
8397 char *buf)
8398 {
8399 return snprintf(buf, PAGE_SIZE, "%s\n", TPACPI_NAME);
8400 }
8401
8402 static struct device_attribute dev_attr_thinkpad_acpi_pdev_name =
8403 __ATTR(name, S_IRUGO, thinkpad_acpi_pdev_name_show, NULL);
8404
8405 /* --------------------------------------------------------------------- */
8406
8407 /* /proc support */
8408 static struct proc_dir_entry *proc_dir;
8409
8410 /*
8411 * Module and infrastructure proble, init and exit handling
8412 */
8413
8414 static bool force_load;
8415
8416 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
8417 static const char * __init str_supported(int is_supported)
8418 {
8419 static char text_unsupported[] __initdata = "not supported";
8420
8421 return (is_supported)? &text_unsupported[4] : &text_unsupported[0];
8422 }
8423 #endif /* CONFIG_THINKPAD_ACPI_DEBUG */
8424
8425 static void ibm_exit(struct ibm_struct *ibm)
8426 {
8427 dbg_printk(TPACPI_DBG_EXIT, "removing %s\n", ibm->name);
8428
8429 list_del_init(&ibm->all_drivers);
8430
8431 if (ibm->flags.acpi_notify_installed) {
8432 dbg_printk(TPACPI_DBG_EXIT,
8433 "%s: acpi_remove_notify_handler\n", ibm->name);
8434 BUG_ON(!ibm->acpi);
8435 acpi_remove_notify_handler(*ibm->acpi->handle,
8436 ibm->acpi->type,
8437 dispatch_acpi_notify);
8438 ibm->flags.acpi_notify_installed = 0;
8439 }
8440
8441 if (ibm->flags.proc_created) {
8442 dbg_printk(TPACPI_DBG_EXIT,
8443 "%s: remove_proc_entry\n", ibm->name);
8444 remove_proc_entry(ibm->name, proc_dir);
8445 ibm->flags.proc_created = 0;
8446 }
8447
8448 if (ibm->flags.acpi_driver_registered) {
8449 dbg_printk(TPACPI_DBG_EXIT,
8450 "%s: acpi_bus_unregister_driver\n", ibm->name);
8451 BUG_ON(!ibm->acpi);
8452 acpi_bus_unregister_driver(ibm->acpi->driver);
8453 kfree(ibm->acpi->driver);
8454 ibm->acpi->driver = NULL;
8455 ibm->flags.acpi_driver_registered = 0;
8456 }
8457
8458 if (ibm->flags.init_called && ibm->exit) {
8459 ibm->exit();
8460 ibm->flags.init_called = 0;
8461 }
8462
8463 dbg_printk(TPACPI_DBG_INIT, "finished removing %s\n", ibm->name);
8464 }
8465
8466 static int __init ibm_init(struct ibm_init_struct *iibm)
8467 {
8468 int ret;
8469 struct ibm_struct *ibm = iibm->data;
8470 struct proc_dir_entry *entry;
8471
8472 BUG_ON(ibm == NULL);
8473
8474 INIT_LIST_HEAD(&ibm->all_drivers);
8475
8476 if (ibm->flags.experimental && !experimental)
8477 return 0;
8478
8479 dbg_printk(TPACPI_DBG_INIT,
8480 "probing for %s\n", ibm->name);
8481
8482 if (iibm->init) {
8483 ret = iibm->init(iibm);
8484 if (ret > 0)
8485 return 0; /* probe failed */
8486 if (ret)
8487 return ret;
8488
8489 ibm->flags.init_called = 1;
8490 }
8491
8492 if (ibm->acpi) {
8493 if (ibm->acpi->hid) {
8494 ret = register_tpacpi_subdriver(ibm);
8495 if (ret)
8496 goto err_out;
8497 }
8498
8499 if (ibm->acpi->notify) {
8500 ret = setup_acpi_notify(ibm);
8501 if (ret == -ENODEV) {
8502 pr_notice("disabling subdriver %s\n",
8503 ibm->name);
8504 ret = 0;
8505 goto err_out;
8506 }
8507 if (ret < 0)
8508 goto err_out;
8509 }
8510 }
8511
8512 dbg_printk(TPACPI_DBG_INIT,
8513 "%s installed\n", ibm->name);
8514
8515 if (ibm->read) {
8516 umode_t mode = iibm->base_procfs_mode;
8517
8518 if (!mode)
8519 mode = S_IRUGO;
8520 if (ibm->write)
8521 mode |= S_IWUSR;
8522 entry = proc_create_data(ibm->name, mode, proc_dir,
8523 &dispatch_proc_fops, ibm);
8524 if (!entry) {
8525 pr_err("unable to create proc entry %s\n", ibm->name);
8526 ret = -ENODEV;
8527 goto err_out;
8528 }
8529 ibm->flags.proc_created = 1;
8530 }
8531
8532 list_add_tail(&ibm->all_drivers, &tpacpi_all_drivers);
8533
8534 return 0;
8535
8536 err_out:
8537 dbg_printk(TPACPI_DBG_INIT,
8538 "%s: at error exit path with result %d\n",
8539 ibm->name, ret);
8540
8541 ibm_exit(ibm);
8542 return (ret < 0)? ret : 0;
8543 }
8544
8545 /* Probing */
8546
8547 static bool __pure __init tpacpi_is_fw_digit(const char c)
8548 {
8549 return (c >= '0' && c <= '9') || (c >= 'A' && c <= 'Z');
8550 }
8551
8552 /* Most models: xxyTkkWW (#.##c); Ancient 570/600 and -SL lacks (#.##c) */
8553 static bool __pure __init tpacpi_is_valid_fw_id(const char* const s,
8554 const char t)
8555 {
8556 return s && strlen(s) >= 8 &&
8557 tpacpi_is_fw_digit(s[0]) &&
8558 tpacpi_is_fw_digit(s[1]) &&
8559 s[2] == t &&
8560 (s[3] == 'T' || s[3] == 'N') &&
8561 tpacpi_is_fw_digit(s[4]) &&
8562 tpacpi_is_fw_digit(s[5]);
8563 }
8564
8565 /* returns 0 - probe ok, or < 0 - probe error.
8566 * Probe ok doesn't mean thinkpad found.
8567 * On error, kfree() cleanup on tp->* is not performed, caller must do it */
8568 static int __must_check __init get_thinkpad_model_data(
8569 struct thinkpad_id_data *tp)
8570 {
8571 const struct dmi_device *dev = NULL;
8572 char ec_fw_string[18];
8573 char const *s;
8574
8575 if (!tp)
8576 return -EINVAL;
8577
8578 memset(tp, 0, sizeof(*tp));
8579
8580 if (dmi_name_in_vendors("IBM"))
8581 tp->vendor = PCI_VENDOR_ID_IBM;
8582 else if (dmi_name_in_vendors("LENOVO"))
8583 tp->vendor = PCI_VENDOR_ID_LENOVO;
8584 else
8585 return 0;
8586
8587 s = dmi_get_system_info(DMI_BIOS_VERSION);
8588 tp->bios_version_str = kstrdup(s, GFP_KERNEL);
8589 if (s && !tp->bios_version_str)
8590 return -ENOMEM;
8591
8592 /* Really ancient ThinkPad 240X will fail this, which is fine */
8593 if (!(tpacpi_is_valid_fw_id(tp->bios_version_str, 'E') ||
8594 tpacpi_is_valid_fw_id(tp->bios_version_str, 'C')))
8595 return 0;
8596
8597 tp->bios_model = tp->bios_version_str[0]
8598 | (tp->bios_version_str[1] << 8);
8599 tp->bios_release = (tp->bios_version_str[4] << 8)
8600 | tp->bios_version_str[5];
8601
8602 /*
8603 * ThinkPad T23 or newer, A31 or newer, R50e or newer,
8604 * X32 or newer, all Z series; Some models must have an
8605 * up-to-date BIOS or they will not be detected.
8606 *
8607 * See http://thinkwiki.org/wiki/List_of_DMI_IDs
8608 */
8609 while ((dev = dmi_find_device(DMI_DEV_TYPE_OEM_STRING, NULL, dev))) {
8610 if (sscanf(dev->name,
8611 "IBM ThinkPad Embedded Controller -[%17c",
8612 ec_fw_string) == 1) {
8613 ec_fw_string[sizeof(ec_fw_string) - 1] = 0;
8614 ec_fw_string[strcspn(ec_fw_string, " ]")] = 0;
8615
8616 tp->ec_version_str = kstrdup(ec_fw_string, GFP_KERNEL);
8617 if (!tp->ec_version_str)
8618 return -ENOMEM;
8619
8620 if (tpacpi_is_valid_fw_id(ec_fw_string, 'H')) {
8621 tp->ec_model = ec_fw_string[0]
8622 | (ec_fw_string[1] << 8);
8623 tp->ec_release = (ec_fw_string[4] << 8)
8624 | ec_fw_string[5];
8625 } else {
8626 pr_notice("ThinkPad firmware release %s "
8627 "doesn't match the known patterns\n",
8628 ec_fw_string);
8629 pr_notice("please report this to %s\n",
8630 TPACPI_MAIL);
8631 }
8632 break;
8633 }
8634 }
8635
8636 s = dmi_get_system_info(DMI_PRODUCT_VERSION);
8637 if (s && !(strnicmp(s, "ThinkPad", 8) && strnicmp(s, "Lenovo", 6))) {
8638 tp->model_str = kstrdup(s, GFP_KERNEL);
8639 if (!tp->model_str)
8640 return -ENOMEM;
8641 } else {
8642 s = dmi_get_system_info(DMI_BIOS_VENDOR);
8643 if (s && !(strnicmp(s, "Lenovo", 6))) {
8644 tp->model_str = kstrdup(s, GFP_KERNEL);
8645 if (!tp->model_str)
8646 return -ENOMEM;
8647 }
8648 }
8649
8650 s = dmi_get_system_info(DMI_PRODUCT_NAME);
8651 tp->nummodel_str = kstrdup(s, GFP_KERNEL);
8652 if (s && !tp->nummodel_str)
8653 return -ENOMEM;
8654
8655 return 0;
8656 }
8657
8658 static int __init probe_for_thinkpad(void)
8659 {
8660 int is_thinkpad;
8661
8662 if (acpi_disabled)
8663 return -ENODEV;
8664
8665 /* It would be dangerous to run the driver in this case */
8666 if (!tpacpi_is_ibm() && !tpacpi_is_lenovo())
8667 return -ENODEV;
8668
8669 /*
8670 * Non-ancient models have better DMI tagging, but very old models
8671 * don't. tpacpi_is_fw_known() is a cheat to help in that case.
8672 */
8673 is_thinkpad = (thinkpad_id.model_str != NULL) ||
8674 (thinkpad_id.ec_model != 0) ||
8675 tpacpi_is_fw_known();
8676
8677 /* The EC handler is required */
8678 tpacpi_acpi_handle_locate("ec", TPACPI_ACPI_EC_HID, &ec_handle);
8679 if (!ec_handle) {
8680 if (is_thinkpad)
8681 pr_err("Not yet supported ThinkPad detected!\n");
8682 return -ENODEV;
8683 }
8684
8685 if (!is_thinkpad && !force_load)
8686 return -ENODEV;
8687
8688 return 0;
8689 }
8690
8691 static void __init thinkpad_acpi_init_banner(void)
8692 {
8693 pr_info("%s v%s\n", TPACPI_DESC, TPACPI_VERSION);
8694 pr_info("%s\n", TPACPI_URL);
8695
8696 pr_info("ThinkPad BIOS %s, EC %s\n",
8697 (thinkpad_id.bios_version_str) ?
8698 thinkpad_id.bios_version_str : "unknown",
8699 (thinkpad_id.ec_version_str) ?
8700 thinkpad_id.ec_version_str : "unknown");
8701
8702 BUG_ON(!thinkpad_id.vendor);
8703
8704 if (thinkpad_id.model_str)
8705 pr_info("%s %s, model %s\n",
8706 (thinkpad_id.vendor == PCI_VENDOR_ID_IBM) ?
8707 "IBM" : ((thinkpad_id.vendor ==
8708 PCI_VENDOR_ID_LENOVO) ?
8709 "Lenovo" : "Unknown vendor"),
8710 thinkpad_id.model_str,
8711 (thinkpad_id.nummodel_str) ?
8712 thinkpad_id.nummodel_str : "unknown");
8713 }
8714
8715 /* Module init, exit, parameters */
8716
8717 static struct ibm_init_struct ibms_init[] __initdata = {
8718 {
8719 .data = &thinkpad_acpi_driver_data,
8720 },
8721 {
8722 .init = hotkey_init,
8723 .data = &hotkey_driver_data,
8724 },
8725 {
8726 .init = bluetooth_init,
8727 .data = &bluetooth_driver_data,
8728 },
8729 {
8730 .init = wan_init,
8731 .data = &wan_driver_data,
8732 },
8733 {
8734 .init = uwb_init,
8735 .data = &uwb_driver_data,
8736 },
8737 #ifdef CONFIG_THINKPAD_ACPI_VIDEO
8738 {
8739 .init = video_init,
8740 .base_procfs_mode = S_IRUSR,
8741 .data = &video_driver_data,
8742 },
8743 #endif
8744 {
8745 .init = light_init,
8746 .data = &light_driver_data,
8747 },
8748 {
8749 .init = cmos_init,
8750 .data = &cmos_driver_data,
8751 },
8752 {
8753 .init = led_init,
8754 .data = &led_driver_data,
8755 },
8756 {
8757 .init = beep_init,
8758 .data = &beep_driver_data,
8759 },
8760 {
8761 .init = thermal_init,
8762 .data = &thermal_driver_data,
8763 },
8764 {
8765 .init = brightness_init,
8766 .data = &brightness_driver_data,
8767 },
8768 {
8769 .init = volume_init,
8770 .data = &volume_driver_data,
8771 },
8772 {
8773 .init = fan_init,
8774 .data = &fan_driver_data,
8775 },
8776 };
8777
8778 static int __init set_ibm_param(const char *val, struct kernel_param *kp)
8779 {
8780 unsigned int i;
8781 struct ibm_struct *ibm;
8782
8783 if (!kp || !kp->name || !val)
8784 return -EINVAL;
8785
8786 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
8787 ibm = ibms_init[i].data;
8788 WARN_ON(ibm == NULL);
8789
8790 if (!ibm || !ibm->name)
8791 continue;
8792
8793 if (strcmp(ibm->name, kp->name) == 0 && ibm->write) {
8794 if (strlen(val) > sizeof(ibms_init[i].param) - 2)
8795 return -ENOSPC;
8796 strcpy(ibms_init[i].param, val);
8797 strcat(ibms_init[i].param, ",");
8798 return 0;
8799 }
8800 }
8801
8802 return -EINVAL;
8803 }
8804
8805 module_param(experimental, int, 0444);
8806 MODULE_PARM_DESC(experimental,
8807 "Enables experimental features when non-zero");
8808
8809 module_param_named(debug, dbg_level, uint, 0);
8810 MODULE_PARM_DESC(debug, "Sets debug level bit-mask");
8811
8812 module_param(force_load, bool, 0444);
8813 MODULE_PARM_DESC(force_load,
8814 "Attempts to load the driver even on a "
8815 "mis-identified ThinkPad when true");
8816
8817 module_param_named(fan_control, fan_control_allowed, bool, 0444);
8818 MODULE_PARM_DESC(fan_control,
8819 "Enables setting fan parameters features when true");
8820
8821 module_param_named(brightness_mode, brightness_mode, uint, 0444);
8822 MODULE_PARM_DESC(brightness_mode,
8823 "Selects brightness control strategy: "
8824 "0=auto, 1=EC, 2=UCMS, 3=EC+NVRAM");
8825
8826 module_param(brightness_enable, uint, 0444);
8827 MODULE_PARM_DESC(brightness_enable,
8828 "Enables backlight control when 1, disables when 0");
8829
8830 #ifdef CONFIG_THINKPAD_ACPI_ALSA_SUPPORT
8831 module_param_named(volume_mode, volume_mode, uint, 0444);
8832 MODULE_PARM_DESC(volume_mode,
8833 "Selects volume control strategy: "
8834 "0=auto, 1=EC, 2=N/A, 3=EC+NVRAM");
8835
8836 module_param_named(volume_capabilities, volume_capabilities, uint, 0444);
8837 MODULE_PARM_DESC(volume_capabilities,
8838 "Selects the mixer capabilites: "
8839 "0=auto, 1=volume and mute, 2=mute only");
8840
8841 module_param_named(volume_control, volume_control_allowed, bool, 0444);
8842 MODULE_PARM_DESC(volume_control,
8843 "Enables software override for the console audio "
8844 "control when true");
8845
8846 /* ALSA module API parameters */
8847 module_param_named(index, alsa_index, int, 0444);
8848 MODULE_PARM_DESC(index, "ALSA index for the ACPI EC Mixer");
8849 module_param_named(id, alsa_id, charp, 0444);
8850 MODULE_PARM_DESC(id, "ALSA id for the ACPI EC Mixer");
8851 module_param_named(enable, alsa_enable, bool, 0444);
8852 MODULE_PARM_DESC(enable, "Enable the ALSA interface for the ACPI EC Mixer");
8853 #endif /* CONFIG_THINKPAD_ACPI_ALSA_SUPPORT */
8854
8855 #define TPACPI_PARAM(feature) \
8856 module_param_call(feature, set_ibm_param, NULL, NULL, 0); \
8857 MODULE_PARM_DESC(feature, "Simulates thinkpad-acpi procfs command " \
8858 "at module load, see documentation")
8859
8860 TPACPI_PARAM(hotkey);
8861 TPACPI_PARAM(bluetooth);
8862 TPACPI_PARAM(video);
8863 TPACPI_PARAM(light);
8864 TPACPI_PARAM(cmos);
8865 TPACPI_PARAM(led);
8866 TPACPI_PARAM(beep);
8867 TPACPI_PARAM(brightness);
8868 TPACPI_PARAM(volume);
8869 TPACPI_PARAM(fan);
8870
8871 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
8872 module_param(dbg_wlswemul, uint, 0444);
8873 MODULE_PARM_DESC(dbg_wlswemul, "Enables WLSW emulation");
8874 module_param_named(wlsw_state, tpacpi_wlsw_emulstate, bool, 0);
8875 MODULE_PARM_DESC(wlsw_state,
8876 "Initial state of the emulated WLSW switch");
8877
8878 module_param(dbg_bluetoothemul, uint, 0444);
8879 MODULE_PARM_DESC(dbg_bluetoothemul, "Enables bluetooth switch emulation");
8880 module_param_named(bluetooth_state, tpacpi_bluetooth_emulstate, bool, 0);
8881 MODULE_PARM_DESC(bluetooth_state,
8882 "Initial state of the emulated bluetooth switch");
8883
8884 module_param(dbg_wwanemul, uint, 0444);
8885 MODULE_PARM_DESC(dbg_wwanemul, "Enables WWAN switch emulation");
8886 module_param_named(wwan_state, tpacpi_wwan_emulstate, bool, 0);
8887 MODULE_PARM_DESC(wwan_state,
8888 "Initial state of the emulated WWAN switch");
8889
8890 module_param(dbg_uwbemul, uint, 0444);
8891 MODULE_PARM_DESC(dbg_uwbemul, "Enables UWB switch emulation");
8892 module_param_named(uwb_state, tpacpi_uwb_emulstate, bool, 0);
8893 MODULE_PARM_DESC(uwb_state,
8894 "Initial state of the emulated UWB switch");
8895 #endif
8896
8897 static void thinkpad_acpi_module_exit(void)
8898 {
8899 struct ibm_struct *ibm, *itmp;
8900
8901 tpacpi_lifecycle = TPACPI_LIFE_EXITING;
8902
8903 list_for_each_entry_safe_reverse(ibm, itmp,
8904 &tpacpi_all_drivers,
8905 all_drivers) {
8906 ibm_exit(ibm);
8907 }
8908
8909 dbg_printk(TPACPI_DBG_INIT, "finished subdriver exit path...\n");
8910
8911 if (tpacpi_inputdev) {
8912 if (tp_features.input_device_registered)
8913 input_unregister_device(tpacpi_inputdev);
8914 else
8915 input_free_device(tpacpi_inputdev);
8916 kfree(hotkey_keycode_map);
8917 }
8918
8919 if (tpacpi_hwmon)
8920 hwmon_device_unregister(tpacpi_hwmon);
8921
8922 if (tp_features.sensors_pdev_attrs_registered)
8923 device_remove_file(&tpacpi_sensors_pdev->dev,
8924 &dev_attr_thinkpad_acpi_pdev_name);
8925 if (tpacpi_sensors_pdev)
8926 platform_device_unregister(tpacpi_sensors_pdev);
8927 if (tpacpi_pdev)
8928 platform_device_unregister(tpacpi_pdev);
8929
8930 if (tp_features.sensors_pdrv_attrs_registered)
8931 tpacpi_remove_driver_attributes(&tpacpi_hwmon_pdriver.driver);
8932 if (tp_features.platform_drv_attrs_registered)
8933 tpacpi_remove_driver_attributes(&tpacpi_pdriver.driver);
8934
8935 if (tp_features.sensors_pdrv_registered)
8936 platform_driver_unregister(&tpacpi_hwmon_pdriver);
8937
8938 if (tp_features.platform_drv_registered)
8939 platform_driver_unregister(&tpacpi_pdriver);
8940
8941 if (proc_dir)
8942 remove_proc_entry(TPACPI_PROC_DIR, acpi_root_dir);
8943
8944 if (tpacpi_wq)
8945 destroy_workqueue(tpacpi_wq);
8946
8947 kfree(thinkpad_id.bios_version_str);
8948 kfree(thinkpad_id.ec_version_str);
8949 kfree(thinkpad_id.model_str);
8950 kfree(thinkpad_id.nummodel_str);
8951 }
8952
8953
8954 static int __init thinkpad_acpi_module_init(void)
8955 {
8956 int ret, i;
8957
8958 tpacpi_lifecycle = TPACPI_LIFE_INIT;
8959
8960 /* Driver-level probe */
8961
8962 ret = get_thinkpad_model_data(&thinkpad_id);
8963 if (ret) {
8964 pr_err("unable to get DMI data: %d\n", ret);
8965 thinkpad_acpi_module_exit();
8966 return ret;
8967 }
8968 ret = probe_for_thinkpad();
8969 if (ret) {
8970 thinkpad_acpi_module_exit();
8971 return ret;
8972 }
8973
8974 /* Driver initialization */
8975
8976 thinkpad_acpi_init_banner();
8977 tpacpi_check_outdated_fw();
8978
8979 TPACPI_ACPIHANDLE_INIT(ecrd);
8980 TPACPI_ACPIHANDLE_INIT(ecwr);
8981
8982 tpacpi_wq = create_singlethread_workqueue(TPACPI_WORKQUEUE_NAME);
8983 if (!tpacpi_wq) {
8984 thinkpad_acpi_module_exit();
8985 return -ENOMEM;
8986 }
8987
8988 proc_dir = proc_mkdir(TPACPI_PROC_DIR, acpi_root_dir);
8989 if (!proc_dir) {
8990 pr_err("unable to create proc dir " TPACPI_PROC_DIR "\n");
8991 thinkpad_acpi_module_exit();
8992 return -ENODEV;
8993 }
8994
8995 ret = platform_driver_register(&tpacpi_pdriver);
8996 if (ret) {
8997 pr_err("unable to register main platform driver\n");
8998 thinkpad_acpi_module_exit();
8999 return ret;
9000 }
9001 tp_features.platform_drv_registered = 1;
9002
9003 ret = platform_driver_register(&tpacpi_hwmon_pdriver);
9004 if (ret) {
9005 pr_err("unable to register hwmon platform driver\n");
9006 thinkpad_acpi_module_exit();
9007 return ret;
9008 }
9009 tp_features.sensors_pdrv_registered = 1;
9010
9011 ret = tpacpi_create_driver_attributes(&tpacpi_pdriver.driver);
9012 if (!ret) {
9013 tp_features.platform_drv_attrs_registered = 1;
9014 ret = tpacpi_create_driver_attributes(
9015 &tpacpi_hwmon_pdriver.driver);
9016 }
9017 if (ret) {
9018 pr_err("unable to create sysfs driver attributes\n");
9019 thinkpad_acpi_module_exit();
9020 return ret;
9021 }
9022 tp_features.sensors_pdrv_attrs_registered = 1;
9023
9024
9025 /* Device initialization */
9026 tpacpi_pdev = platform_device_register_simple(TPACPI_DRVR_NAME, -1,
9027 NULL, 0);
9028 if (IS_ERR(tpacpi_pdev)) {
9029 ret = PTR_ERR(tpacpi_pdev);
9030 tpacpi_pdev = NULL;
9031 pr_err("unable to register platform device\n");
9032 thinkpad_acpi_module_exit();
9033 return ret;
9034 }
9035 tpacpi_sensors_pdev = platform_device_register_simple(
9036 TPACPI_HWMON_DRVR_NAME,
9037 -1, NULL, 0);
9038 if (IS_ERR(tpacpi_sensors_pdev)) {
9039 ret = PTR_ERR(tpacpi_sensors_pdev);
9040 tpacpi_sensors_pdev = NULL;
9041 pr_err("unable to register hwmon platform device\n");
9042 thinkpad_acpi_module_exit();
9043 return ret;
9044 }
9045 ret = device_create_file(&tpacpi_sensors_pdev->dev,
9046 &dev_attr_thinkpad_acpi_pdev_name);
9047 if (ret) {
9048 pr_err("unable to create sysfs hwmon device attributes\n");
9049 thinkpad_acpi_module_exit();
9050 return ret;
9051 }
9052 tp_features.sensors_pdev_attrs_registered = 1;
9053 tpacpi_hwmon = hwmon_device_register(&tpacpi_sensors_pdev->dev);
9054 if (IS_ERR(tpacpi_hwmon)) {
9055 ret = PTR_ERR(tpacpi_hwmon);
9056 tpacpi_hwmon = NULL;
9057 pr_err("unable to register hwmon device\n");
9058 thinkpad_acpi_module_exit();
9059 return ret;
9060 }
9061 mutex_init(&tpacpi_inputdev_send_mutex);
9062 tpacpi_inputdev = input_allocate_device();
9063 if (!tpacpi_inputdev) {
9064 pr_err("unable to allocate input device\n");
9065 thinkpad_acpi_module_exit();
9066 return -ENOMEM;
9067 } else {
9068 /* Prepare input device, but don't register */
9069 tpacpi_inputdev->name = "ThinkPad Extra Buttons";
9070 tpacpi_inputdev->phys = TPACPI_DRVR_NAME "/input0";
9071 tpacpi_inputdev->id.bustype = BUS_HOST;
9072 tpacpi_inputdev->id.vendor = thinkpad_id.vendor;
9073 tpacpi_inputdev->id.product = TPACPI_HKEY_INPUT_PRODUCT;
9074 tpacpi_inputdev->id.version = TPACPI_HKEY_INPUT_VERSION;
9075 tpacpi_inputdev->dev.parent = &tpacpi_pdev->dev;
9076 }
9077
9078 /* Init subdriver dependencies */
9079 tpacpi_detect_brightness_capabilities();
9080
9081 /* Init subdrivers */
9082 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
9083 ret = ibm_init(&ibms_init[i]);
9084 if (ret >= 0 && *ibms_init[i].param)
9085 ret = ibms_init[i].data->write(ibms_init[i].param);
9086 if (ret < 0) {
9087 thinkpad_acpi_module_exit();
9088 return ret;
9089 }
9090 }
9091
9092 tpacpi_lifecycle = TPACPI_LIFE_RUNNING;
9093
9094 ret = input_register_device(tpacpi_inputdev);
9095 if (ret < 0) {
9096 pr_err("unable to register input device\n");
9097 thinkpad_acpi_module_exit();
9098 return ret;
9099 } else {
9100 tp_features.input_device_registered = 1;
9101 }
9102
9103 return 0;
9104 }
9105
9106 MODULE_ALIAS(TPACPI_DRVR_SHORTNAME);
9107
9108 /*
9109 * This will autoload the driver in almost every ThinkPad
9110 * in widespread use.
9111 *
9112 * Only _VERY_ old models, like the 240, 240x and 570 lack
9113 * the HKEY event interface.
9114 */
9115 MODULE_DEVICE_TABLE(acpi, ibm_htk_device_ids);
9116
9117 /*
9118 * DMI matching for module autoloading
9119 *
9120 * See http://thinkwiki.org/wiki/List_of_DMI_IDs
9121 * See http://thinkwiki.org/wiki/BIOS_Upgrade_Downloads
9122 *
9123 * Only models listed in thinkwiki will be supported, so add yours
9124 * if it is not there yet.
9125 */
9126 #define IBM_BIOS_MODULE_ALIAS(__type) \
9127 MODULE_ALIAS("dmi:bvnIBM:bvr" __type "ET??WW*")
9128
9129 /* Ancient thinkpad BIOSes have to be identified by
9130 * BIOS type or model number, and there are far less
9131 * BIOS types than model numbers... */
9132 IBM_BIOS_MODULE_ALIAS("I[MU]"); /* 570, 570e */
9133
9134 MODULE_AUTHOR("Borislav Deianov <borislav@users.sf.net>");
9135 MODULE_AUTHOR("Henrique de Moraes Holschuh <hmh@hmh.eng.br>");
9136 MODULE_DESCRIPTION(TPACPI_DESC);
9137 MODULE_VERSION(TPACPI_VERSION);
9138 MODULE_LICENSE("GPL");
9139
9140 module_init(thinkpad_acpi_module_init);
9141 module_exit(thinkpad_acpi_module_exit);
Linux with added FPC-III support