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Merge tag 'platform-drivers-x86-v3.19-1' of git://git.infradead.org/users/dvhart...
[deliverable/linux.git] / drivers / platform / x86 / thinkpad_acpi.c
1 /*
2 * thinkpad_acpi.c - ThinkPad ACPI Extras
3 *
4 *
5 * Copyright (C) 2004-2005 Borislav Deianov <borislav@users.sf.net>
6 * Copyright (C) 2006-2009 Henrique de Moraes Holschuh <hmh@hmh.eng.br>
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
21 * 02110-1301, USA.
22 */
23
24 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
25
26 #define TPACPI_VERSION "0.25"
27 #define TPACPI_SYSFS_VERSION 0x020700
28
29 /*
30 * Changelog:
31 * 2007-10-20 changelog trimmed down
32 *
33 * 2007-03-27 0.14 renamed to thinkpad_acpi and moved to
34 * drivers/misc.
35 *
36 * 2006-11-22 0.13 new maintainer
37 * changelog now lives in git commit history, and will
38 * not be updated further in-file.
39 *
40 * 2005-03-17 0.11 support for 600e, 770x
41 * thanks to Jamie Lentin <lentinj@dial.pipex.com>
42 *
43 * 2005-01-16 0.9 use MODULE_VERSION
44 * thanks to Henrik Brix Andersen <brix@gentoo.org>
45 * fix parameter passing on module loading
46 * thanks to Rusty Russell <rusty@rustcorp.com.au>
47 * thanks to Jim Radford <radford@blackbean.org>
48 * 2004-11-08 0.8 fix init error case, don't return from a macro
49 * thanks to Chris Wright <chrisw@osdl.org>
50 */
51
52 #include <linux/kernel.h>
53 #include <linux/module.h>
54 #include <linux/init.h>
55 #include <linux/types.h>
56 #include <linux/string.h>
57 #include <linux/list.h>
58 #include <linux/mutex.h>
59 #include <linux/sched.h>
60 #include <linux/kthread.h>
61 #include <linux/freezer.h>
62 #include <linux/delay.h>
63 #include <linux/slab.h>
64 #include <linux/nvram.h>
65 #include <linux/proc_fs.h>
66 #include <linux/seq_file.h>
67 #include <linux/sysfs.h>
68 #include <linux/backlight.h>
69 #include <linux/fb.h>
70 #include <linux/platform_device.h>
71 #include <linux/hwmon.h>
72 #include <linux/hwmon-sysfs.h>
73 #include <linux/input.h>
74 #include <linux/leds.h>
75 #include <linux/rfkill.h>
76 #include <linux/dmi.h>
77 #include <linux/jiffies.h>
78 #include <linux/workqueue.h>
79 #include <linux/acpi.h>
80 #include <linux/pci_ids.h>
81 #include <linux/thinkpad_acpi.h>
82 #include <sound/core.h>
83 #include <sound/control.h>
84 #include <sound/initval.h>
85 #include <asm/uaccess.h>
86
87 /* ThinkPad CMOS commands */
88 #define TP_CMOS_VOLUME_DOWN 0
89 #define TP_CMOS_VOLUME_UP 1
90 #define TP_CMOS_VOLUME_MUTE 2
91 #define TP_CMOS_BRIGHTNESS_UP 4
92 #define TP_CMOS_BRIGHTNESS_DOWN 5
93 #define TP_CMOS_THINKLIGHT_ON 12
94 #define TP_CMOS_THINKLIGHT_OFF 13
95
96 /* NVRAM Addresses */
97 enum tp_nvram_addr {
98 TP_NVRAM_ADDR_HK2 = 0x57,
99 TP_NVRAM_ADDR_THINKLIGHT = 0x58,
100 TP_NVRAM_ADDR_VIDEO = 0x59,
101 TP_NVRAM_ADDR_BRIGHTNESS = 0x5e,
102 TP_NVRAM_ADDR_MIXER = 0x60,
103 };
104
105 /* NVRAM bit masks */
106 enum {
107 TP_NVRAM_MASK_HKT_THINKPAD = 0x08,
108 TP_NVRAM_MASK_HKT_ZOOM = 0x20,
109 TP_NVRAM_MASK_HKT_DISPLAY = 0x40,
110 TP_NVRAM_MASK_HKT_HIBERNATE = 0x80,
111 TP_NVRAM_MASK_THINKLIGHT = 0x10,
112 TP_NVRAM_MASK_HKT_DISPEXPND = 0x30,
113 TP_NVRAM_MASK_HKT_BRIGHTNESS = 0x20,
114 TP_NVRAM_MASK_LEVEL_BRIGHTNESS = 0x0f,
115 TP_NVRAM_POS_LEVEL_BRIGHTNESS = 0,
116 TP_NVRAM_MASK_MUTE = 0x40,
117 TP_NVRAM_MASK_HKT_VOLUME = 0x80,
118 TP_NVRAM_MASK_LEVEL_VOLUME = 0x0f,
119 TP_NVRAM_POS_LEVEL_VOLUME = 0,
120 };
121
122 /* Misc NVRAM-related */
123 enum {
124 TP_NVRAM_LEVEL_VOLUME_MAX = 14,
125 };
126
127 /* ACPI HIDs */
128 #define TPACPI_ACPI_IBM_HKEY_HID "IBM0068"
129 #define TPACPI_ACPI_LENOVO_HKEY_HID "LEN0068"
130 #define TPACPI_ACPI_EC_HID "PNP0C09"
131
132 /* Input IDs */
133 #define TPACPI_HKEY_INPUT_PRODUCT 0x5054 /* "TP" */
134 #define TPACPI_HKEY_INPUT_VERSION 0x4101
135
136 /* ACPI \WGSV commands */
137 enum {
138 TP_ACPI_WGSV_GET_STATE = 0x01, /* Get state information */
139 TP_ACPI_WGSV_PWR_ON_ON_RESUME = 0x02, /* Resume WWAN powered on */
140 TP_ACPI_WGSV_PWR_OFF_ON_RESUME = 0x03, /* Resume WWAN powered off */
141 TP_ACPI_WGSV_SAVE_STATE = 0x04, /* Save state for S4/S5 */
142 };
143
144 /* TP_ACPI_WGSV_GET_STATE bits */
145 enum {
146 TP_ACPI_WGSV_STATE_WWANEXIST = 0x0001, /* WWAN hw available */
147 TP_ACPI_WGSV_STATE_WWANPWR = 0x0002, /* WWAN radio enabled */
148 TP_ACPI_WGSV_STATE_WWANPWRRES = 0x0004, /* WWAN state at resume */
149 TP_ACPI_WGSV_STATE_WWANBIOSOFF = 0x0008, /* WWAN disabled in BIOS */
150 TP_ACPI_WGSV_STATE_BLTHEXIST = 0x0001, /* BLTH hw available */
151 TP_ACPI_WGSV_STATE_BLTHPWR = 0x0002, /* BLTH radio enabled */
152 TP_ACPI_WGSV_STATE_BLTHPWRRES = 0x0004, /* BLTH state at resume */
153 TP_ACPI_WGSV_STATE_BLTHBIOSOFF = 0x0008, /* BLTH disabled in BIOS */
154 TP_ACPI_WGSV_STATE_UWBEXIST = 0x0010, /* UWB hw available */
155 TP_ACPI_WGSV_STATE_UWBPWR = 0x0020, /* UWB radio enabled */
156 };
157
158 /* HKEY events */
159 enum tpacpi_hkey_event_t {
160 /* Hotkey-related */
161 TP_HKEY_EV_HOTKEY_BASE = 0x1001, /* first hotkey (FN+F1) */
162 TP_HKEY_EV_BRGHT_UP = 0x1010, /* Brightness up */
163 TP_HKEY_EV_BRGHT_DOWN = 0x1011, /* Brightness down */
164 TP_HKEY_EV_VOL_UP = 0x1015, /* Volume up or unmute */
165 TP_HKEY_EV_VOL_DOWN = 0x1016, /* Volume down or unmute */
166 TP_HKEY_EV_VOL_MUTE = 0x1017, /* Mixer output mute */
167
168 /* Reasons for waking up from S3/S4 */
169 TP_HKEY_EV_WKUP_S3_UNDOCK = 0x2304, /* undock requested, S3 */
170 TP_HKEY_EV_WKUP_S4_UNDOCK = 0x2404, /* undock requested, S4 */
171 TP_HKEY_EV_WKUP_S3_BAYEJ = 0x2305, /* bay ejection req, S3 */
172 TP_HKEY_EV_WKUP_S4_BAYEJ = 0x2405, /* bay ejection req, S4 */
173 TP_HKEY_EV_WKUP_S3_BATLOW = 0x2313, /* battery empty, S3 */
174 TP_HKEY_EV_WKUP_S4_BATLOW = 0x2413, /* battery empty, S4 */
175
176 /* Auto-sleep after eject request */
177 TP_HKEY_EV_BAYEJ_ACK = 0x3003, /* bay ejection complete */
178 TP_HKEY_EV_UNDOCK_ACK = 0x4003, /* undock complete */
179
180 /* Misc bay events */
181 TP_HKEY_EV_OPTDRV_EJ = 0x3006, /* opt. drive tray ejected */
182 TP_HKEY_EV_HOTPLUG_DOCK = 0x4010, /* docked into hotplug dock
183 or port replicator */
184 TP_HKEY_EV_HOTPLUG_UNDOCK = 0x4011, /* undocked from hotplug
185 dock or port replicator */
186
187 /* User-interface events */
188 TP_HKEY_EV_LID_CLOSE = 0x5001, /* laptop lid closed */
189 TP_HKEY_EV_LID_OPEN = 0x5002, /* laptop lid opened */
190 TP_HKEY_EV_TABLET_TABLET = 0x5009, /* tablet swivel up */
191 TP_HKEY_EV_TABLET_NOTEBOOK = 0x500a, /* tablet swivel down */
192 TP_HKEY_EV_PEN_INSERTED = 0x500b, /* tablet pen inserted */
193 TP_HKEY_EV_PEN_REMOVED = 0x500c, /* tablet pen removed */
194 TP_HKEY_EV_BRGHT_CHANGED = 0x5010, /* backlight control event */
195
196 /* Key-related user-interface events */
197 TP_HKEY_EV_KEY_NUMLOCK = 0x6000, /* NumLock key pressed */
198 TP_HKEY_EV_KEY_FN = 0x6005, /* Fn key pressed? E420 */
199
200 /* Thermal events */
201 TP_HKEY_EV_ALARM_BAT_HOT = 0x6011, /* battery too hot */
202 TP_HKEY_EV_ALARM_BAT_XHOT = 0x6012, /* battery critically hot */
203 TP_HKEY_EV_ALARM_SENSOR_HOT = 0x6021, /* sensor too hot */
204 TP_HKEY_EV_ALARM_SENSOR_XHOT = 0x6022, /* sensor critically hot */
205 TP_HKEY_EV_THM_TABLE_CHANGED = 0x6030, /* thermal table changed */
206
207 /* AC-related events */
208 TP_HKEY_EV_AC_CHANGED = 0x6040, /* AC status changed */
209
210 /* Misc */
211 TP_HKEY_EV_RFKILL_CHANGED = 0x7000, /* rfkill switch changed */
212 };
213
214 /****************************************************************************
215 * Main driver
216 */
217
218 #define TPACPI_NAME "thinkpad"
219 #define TPACPI_DESC "ThinkPad ACPI Extras"
220 #define TPACPI_FILE TPACPI_NAME "_acpi"
221 #define TPACPI_URL "http://ibm-acpi.sf.net/"
222 #define TPACPI_MAIL "ibm-acpi-devel@lists.sourceforge.net"
223
224 #define TPACPI_PROC_DIR "ibm"
225 #define TPACPI_ACPI_EVENT_PREFIX "ibm"
226 #define TPACPI_DRVR_NAME TPACPI_FILE
227 #define TPACPI_DRVR_SHORTNAME "tpacpi"
228 #define TPACPI_HWMON_DRVR_NAME TPACPI_NAME "_hwmon"
229
230 #define TPACPI_NVRAM_KTHREAD_NAME "ktpacpi_nvramd"
231 #define TPACPI_WORKQUEUE_NAME "ktpacpid"
232
233 #define TPACPI_MAX_ACPI_ARGS 3
234
235 /* Debugging printk groups */
236 #define TPACPI_DBG_ALL 0xffff
237 #define TPACPI_DBG_DISCLOSETASK 0x8000
238 #define TPACPI_DBG_INIT 0x0001
239 #define TPACPI_DBG_EXIT 0x0002
240 #define TPACPI_DBG_RFKILL 0x0004
241 #define TPACPI_DBG_HKEY 0x0008
242 #define TPACPI_DBG_FAN 0x0010
243 #define TPACPI_DBG_BRGHT 0x0020
244 #define TPACPI_DBG_MIXER 0x0040
245
246 #define onoff(status, bit) ((status) & (1 << (bit)) ? "on" : "off")
247 #define enabled(status, bit) ((status) & (1 << (bit)) ? "enabled" : "disabled")
248 #define strlencmp(a, b) (strncmp((a), (b), strlen(b)))
249
250
251 /****************************************************************************
252 * Driver-wide structs and misc. variables
253 */
254
255 struct ibm_struct;
256
257 struct tp_acpi_drv_struct {
258 const struct acpi_device_id *hid;
259 struct acpi_driver *driver;
260
261 void (*notify) (struct ibm_struct *, u32);
262 acpi_handle *handle;
263 u32 type;
264 struct acpi_device *device;
265 };
266
267 struct ibm_struct {
268 char *name;
269
270 int (*read) (struct seq_file *);
271 int (*write) (char *);
272 void (*exit) (void);
273 void (*resume) (void);
274 void (*suspend) (void);
275 void (*shutdown) (void);
276
277 struct list_head all_drivers;
278
279 struct tp_acpi_drv_struct *acpi;
280
281 struct {
282 u8 acpi_driver_registered:1;
283 u8 acpi_notify_installed:1;
284 u8 proc_created:1;
285 u8 init_called:1;
286 u8 experimental:1;
287 } flags;
288 };
289
290 struct ibm_init_struct {
291 char param[32];
292
293 int (*init) (struct ibm_init_struct *);
294 umode_t base_procfs_mode;
295 struct ibm_struct *data;
296 };
297
298 static struct {
299 u32 bluetooth:1;
300 u32 hotkey:1;
301 u32 hotkey_mask:1;
302 u32 hotkey_wlsw:1;
303 u32 hotkey_tablet:1;
304 u32 light:1;
305 u32 light_status:1;
306 u32 bright_acpimode:1;
307 u32 bright_unkfw:1;
308 u32 wan:1;
309 u32 uwb:1;
310 u32 fan_ctrl_status_undef:1;
311 u32 second_fan:1;
312 u32 beep_needs_two_args:1;
313 u32 mixer_no_level_control:1;
314 u32 input_device_registered:1;
315 u32 platform_drv_registered:1;
316 u32 platform_drv_attrs_registered:1;
317 u32 sensors_pdrv_registered:1;
318 u32 sensors_pdrv_attrs_registered:1;
319 u32 sensors_pdev_attrs_registered:1;
320 u32 hotkey_poll_active:1;
321 } tp_features;
322
323 static struct {
324 u16 hotkey_mask_ff:1;
325 u16 volume_ctrl_forbidden:1;
326 } tp_warned;
327
328 struct thinkpad_id_data {
329 unsigned int vendor; /* ThinkPad vendor:
330 * PCI_VENDOR_ID_IBM/PCI_VENDOR_ID_LENOVO */
331
332 char *bios_version_str; /* Something like 1ZET51WW (1.03z) */
333 char *ec_version_str; /* Something like 1ZHT51WW-1.04a */
334
335 u16 bios_model; /* 1Y = 0x5931, 0 = unknown */
336 u16 ec_model;
337 u16 bios_release; /* 1ZETK1WW = 0x314b, 0 = unknown */
338 u16 ec_release;
339
340 char *model_str; /* ThinkPad T43 */
341 char *nummodel_str; /* 9384A9C for a 9384-A9C model */
342 };
343 static struct thinkpad_id_data thinkpad_id;
344
345 static enum {
346 TPACPI_LIFE_INIT = 0,
347 TPACPI_LIFE_RUNNING,
348 TPACPI_LIFE_EXITING,
349 } tpacpi_lifecycle;
350
351 static int experimental;
352 static u32 dbg_level;
353
354 static struct workqueue_struct *tpacpi_wq;
355
356 enum led_status_t {
357 TPACPI_LED_OFF = 0,
358 TPACPI_LED_ON,
359 TPACPI_LED_BLINK,
360 };
361
362 /* Special LED class that can defer work */
363 struct tpacpi_led_classdev {
364 struct led_classdev led_classdev;
365 struct work_struct work;
366 enum led_status_t new_state;
367 int led;
368 };
369
370 /* brightness level capabilities */
371 static unsigned int bright_maxlvl; /* 0 = unknown */
372
373 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
374 static int dbg_wlswemul;
375 static bool tpacpi_wlsw_emulstate;
376 static int dbg_bluetoothemul;
377 static bool tpacpi_bluetooth_emulstate;
378 static int dbg_wwanemul;
379 static bool tpacpi_wwan_emulstate;
380 static int dbg_uwbemul;
381 static bool tpacpi_uwb_emulstate;
382 #endif
383
384
385 /*************************************************************************
386 * Debugging helpers
387 */
388
389 #define dbg_printk(a_dbg_level, format, arg...) \
390 do { \
391 if (dbg_level & (a_dbg_level)) \
392 printk(KERN_DEBUG pr_fmt("%s: " format), \
393 __func__, ##arg); \
394 } while (0)
395
396 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
397 #define vdbg_printk dbg_printk
398 static const char *str_supported(int is_supported);
399 #else
400 static inline const char *str_supported(int is_supported) { return ""; }
401 #define vdbg_printk(a_dbg_level, format, arg...) \
402 no_printk(format, ##arg)
403 #endif
404
405 static void tpacpi_log_usertask(const char * const what)
406 {
407 printk(KERN_DEBUG pr_fmt("%s: access by process with PID %d\n"),
408 what, task_tgid_vnr(current));
409 }
410
411 #define tpacpi_disclose_usertask(what, format, arg...) \
412 do { \
413 if (unlikely((dbg_level & TPACPI_DBG_DISCLOSETASK) && \
414 (tpacpi_lifecycle == TPACPI_LIFE_RUNNING))) { \
415 printk(KERN_DEBUG pr_fmt("%s: PID %d: " format), \
416 what, task_tgid_vnr(current), ## arg); \
417 } \
418 } while (0)
419
420 /*
421 * Quirk handling helpers
422 *
423 * ThinkPad IDs and versions seen in the field so far
424 * are two-characters from the set [0-9A-Z], i.e. base 36.
425 *
426 * We use values well outside that range as specials.
427 */
428
429 #define TPACPI_MATCH_ANY 0xffffU
430 #define TPACPI_MATCH_UNKNOWN 0U
431
432 /* TPID('1', 'Y') == 0x5931 */
433 #define TPID(__c1, __c2) (((__c2) << 8) | (__c1))
434
435 #define TPACPI_Q_IBM(__id1, __id2, __quirk) \
436 { .vendor = PCI_VENDOR_ID_IBM, \
437 .bios = TPID(__id1, __id2), \
438 .ec = TPACPI_MATCH_ANY, \
439 .quirks = (__quirk) }
440
441 #define TPACPI_Q_LNV(__id1, __id2, __quirk) \
442 { .vendor = PCI_VENDOR_ID_LENOVO, \
443 .bios = TPID(__id1, __id2), \
444 .ec = TPACPI_MATCH_ANY, \
445 .quirks = (__quirk) }
446
447 #define TPACPI_QEC_LNV(__id1, __id2, __quirk) \
448 { .vendor = PCI_VENDOR_ID_LENOVO, \
449 .bios = TPACPI_MATCH_ANY, \
450 .ec = TPID(__id1, __id2), \
451 .quirks = (__quirk) }
452
453 struct tpacpi_quirk {
454 unsigned int vendor;
455 u16 bios;
456 u16 ec;
457 unsigned long quirks;
458 };
459
460 /**
461 * tpacpi_check_quirks() - search BIOS/EC version on a list
462 * @qlist: array of &struct tpacpi_quirk
463 * @qlist_size: number of elements in @qlist
464 *
465 * Iterates over a quirks list until one is found that matches the
466 * ThinkPad's vendor, BIOS and EC model.
467 *
468 * Returns 0 if nothing matches, otherwise returns the quirks field of
469 * the matching &struct tpacpi_quirk entry.
470 *
471 * The match criteria is: vendor, ec and bios much match.
472 */
473 static unsigned long __init tpacpi_check_quirks(
474 const struct tpacpi_quirk *qlist,
475 unsigned int qlist_size)
476 {
477 while (qlist_size) {
478 if ((qlist->vendor == thinkpad_id.vendor ||
479 qlist->vendor == TPACPI_MATCH_ANY) &&
480 (qlist->bios == thinkpad_id.bios_model ||
481 qlist->bios == TPACPI_MATCH_ANY) &&
482 (qlist->ec == thinkpad_id.ec_model ||
483 qlist->ec == TPACPI_MATCH_ANY))
484 return qlist->quirks;
485
486 qlist_size--;
487 qlist++;
488 }
489 return 0;
490 }
491
492 static inline bool __pure __init tpacpi_is_lenovo(void)
493 {
494 return thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO;
495 }
496
497 static inline bool __pure __init tpacpi_is_ibm(void)
498 {
499 return thinkpad_id.vendor == PCI_VENDOR_ID_IBM;
500 }
501
502 /****************************************************************************
503 ****************************************************************************
504 *
505 * ACPI Helpers and device model
506 *
507 ****************************************************************************
508 ****************************************************************************/
509
510 /*************************************************************************
511 * ACPI basic handles
512 */
513
514 static acpi_handle root_handle;
515 static acpi_handle ec_handle;
516
517 #define TPACPI_HANDLE(object, parent, paths...) \
518 static acpi_handle object##_handle; \
519 static const acpi_handle * const object##_parent __initconst = \
520 &parent##_handle; \
521 static char *object##_paths[] __initdata = { paths }
522
523 TPACPI_HANDLE(ecrd, ec, "ECRD"); /* 570 */
524 TPACPI_HANDLE(ecwr, ec, "ECWR"); /* 570 */
525
526 TPACPI_HANDLE(cmos, root, "\\UCMS", /* R50, R50e, R50p, R51, */
527 /* T4x, X31, X40 */
528 "\\CMOS", /* A3x, G4x, R32, T23, T30, X22-24, X30 */
529 "\\CMS", /* R40, R40e */
530 ); /* all others */
531
532 TPACPI_HANDLE(hkey, ec, "\\_SB.HKEY", /* 600e/x, 770e, 770x */
533 "^HKEY", /* R30, R31 */
534 "HKEY", /* all others */
535 ); /* 570 */
536
537 /*************************************************************************
538 * ACPI helpers
539 */
540
541 static int acpi_evalf(acpi_handle handle,
542 int *res, char *method, char *fmt, ...)
543 {
544 char *fmt0 = fmt;
545 struct acpi_object_list params;
546 union acpi_object in_objs[TPACPI_MAX_ACPI_ARGS];
547 struct acpi_buffer result, *resultp;
548 union acpi_object out_obj;
549 acpi_status status;
550 va_list ap;
551 char res_type;
552 int success;
553 int quiet;
554
555 if (!*fmt) {
556 pr_err("acpi_evalf() called with empty format\n");
557 return 0;
558 }
559
560 if (*fmt == 'q') {
561 quiet = 1;
562 fmt++;
563 } else
564 quiet = 0;
565
566 res_type = *(fmt++);
567
568 params.count = 0;
569 params.pointer = &in_objs[0];
570
571 va_start(ap, fmt);
572 while (*fmt) {
573 char c = *(fmt++);
574 switch (c) {
575 case 'd': /* int */
576 in_objs[params.count].integer.value = va_arg(ap, int);
577 in_objs[params.count++].type = ACPI_TYPE_INTEGER;
578 break;
579 /* add more types as needed */
580 default:
581 pr_err("acpi_evalf() called "
582 "with invalid format character '%c'\n", c);
583 va_end(ap);
584 return 0;
585 }
586 }
587 va_end(ap);
588
589 if (res_type != 'v') {
590 result.length = sizeof(out_obj);
591 result.pointer = &out_obj;
592 resultp = &result;
593 } else
594 resultp = NULL;
595
596 status = acpi_evaluate_object(handle, method, &params, resultp);
597
598 switch (res_type) {
599 case 'd': /* int */
600 success = (status == AE_OK &&
601 out_obj.type == ACPI_TYPE_INTEGER);
602 if (success && res)
603 *res = out_obj.integer.value;
604 break;
605 case 'v': /* void */
606 success = status == AE_OK;
607 break;
608 /* add more types as needed */
609 default:
610 pr_err("acpi_evalf() called "
611 "with invalid format character '%c'\n", res_type);
612 return 0;
613 }
614
615 if (!success && !quiet)
616 pr_err("acpi_evalf(%s, %s, ...) failed: %s\n",
617 method, fmt0, acpi_format_exception(status));
618
619 return success;
620 }
621
622 static int acpi_ec_read(int i, u8 *p)
623 {
624 int v;
625
626 if (ecrd_handle) {
627 if (!acpi_evalf(ecrd_handle, &v, NULL, "dd", i))
628 return 0;
629 *p = v;
630 } else {
631 if (ec_read(i, p) < 0)
632 return 0;
633 }
634
635 return 1;
636 }
637
638 static int acpi_ec_write(int i, u8 v)
639 {
640 if (ecwr_handle) {
641 if (!acpi_evalf(ecwr_handle, NULL, NULL, "vdd", i, v))
642 return 0;
643 } else {
644 if (ec_write(i, v) < 0)
645 return 0;
646 }
647
648 return 1;
649 }
650
651 static int issue_thinkpad_cmos_command(int cmos_cmd)
652 {
653 if (!cmos_handle)
654 return -ENXIO;
655
656 if (!acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd))
657 return -EIO;
658
659 return 0;
660 }
661
662 /*************************************************************************
663 * ACPI device model
664 */
665
666 #define TPACPI_ACPIHANDLE_INIT(object) \
667 drv_acpi_handle_init(#object, &object##_handle, *object##_parent, \
668 object##_paths, ARRAY_SIZE(object##_paths))
669
670 static void __init drv_acpi_handle_init(const char *name,
671 acpi_handle *handle, const acpi_handle parent,
672 char **paths, const int num_paths)
673 {
674 int i;
675 acpi_status status;
676
677 vdbg_printk(TPACPI_DBG_INIT, "trying to locate ACPI handle for %s\n",
678 name);
679
680 for (i = 0; i < num_paths; i++) {
681 status = acpi_get_handle(parent, paths[i], handle);
682 if (ACPI_SUCCESS(status)) {
683 dbg_printk(TPACPI_DBG_INIT,
684 "Found ACPI handle %s for %s\n",
685 paths[i], name);
686 return;
687 }
688 }
689
690 vdbg_printk(TPACPI_DBG_INIT, "ACPI handle for %s not found\n",
691 name);
692 *handle = NULL;
693 }
694
695 static acpi_status __init tpacpi_acpi_handle_locate_callback(acpi_handle handle,
696 u32 level, void *context, void **return_value)
697 {
698 struct acpi_device *dev;
699 if (!strcmp(context, "video")) {
700 if (acpi_bus_get_device(handle, &dev))
701 return AE_OK;
702 if (strcmp(ACPI_VIDEO_HID, acpi_device_hid(dev)))
703 return AE_OK;
704 }
705
706 *(acpi_handle *)return_value = handle;
707
708 return AE_CTRL_TERMINATE;
709 }
710
711 static void __init tpacpi_acpi_handle_locate(const char *name,
712 const char *hid,
713 acpi_handle *handle)
714 {
715 acpi_status status;
716 acpi_handle device_found;
717
718 BUG_ON(!name || !handle);
719 vdbg_printk(TPACPI_DBG_INIT,
720 "trying to locate ACPI handle for %s, using HID %s\n",
721 name, hid ? hid : "NULL");
722
723 memset(&device_found, 0, sizeof(device_found));
724 status = acpi_get_devices(hid, tpacpi_acpi_handle_locate_callback,
725 (void *)name, &device_found);
726
727 *handle = NULL;
728
729 if (ACPI_SUCCESS(status)) {
730 *handle = device_found;
731 dbg_printk(TPACPI_DBG_INIT,
732 "Found ACPI handle for %s\n", name);
733 } else {
734 vdbg_printk(TPACPI_DBG_INIT,
735 "Could not locate an ACPI handle for %s: %s\n",
736 name, acpi_format_exception(status));
737 }
738 }
739
740 static void dispatch_acpi_notify(acpi_handle handle, u32 event, void *data)
741 {
742 struct ibm_struct *ibm = data;
743
744 if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
745 return;
746
747 if (!ibm || !ibm->acpi || !ibm->acpi->notify)
748 return;
749
750 ibm->acpi->notify(ibm, event);
751 }
752
753 static int __init setup_acpi_notify(struct ibm_struct *ibm)
754 {
755 acpi_status status;
756 int rc;
757
758 BUG_ON(!ibm->acpi);
759
760 if (!*ibm->acpi->handle)
761 return 0;
762
763 vdbg_printk(TPACPI_DBG_INIT,
764 "setting up ACPI notify for %s\n", ibm->name);
765
766 rc = acpi_bus_get_device(*ibm->acpi->handle, &ibm->acpi->device);
767 if (rc < 0) {
768 pr_err("acpi_bus_get_device(%s) failed: %d\n", ibm->name, rc);
769 return -ENODEV;
770 }
771
772 ibm->acpi->device->driver_data = ibm;
773 sprintf(acpi_device_class(ibm->acpi->device), "%s/%s",
774 TPACPI_ACPI_EVENT_PREFIX,
775 ibm->name);
776
777 status = acpi_install_notify_handler(*ibm->acpi->handle,
778 ibm->acpi->type, dispatch_acpi_notify, ibm);
779 if (ACPI_FAILURE(status)) {
780 if (status == AE_ALREADY_EXISTS) {
781 pr_notice("another device driver is already "
782 "handling %s events\n", ibm->name);
783 } else {
784 pr_err("acpi_install_notify_handler(%s) failed: %s\n",
785 ibm->name, acpi_format_exception(status));
786 }
787 return -ENODEV;
788 }
789 ibm->flags.acpi_notify_installed = 1;
790 return 0;
791 }
792
793 static int __init tpacpi_device_add(struct acpi_device *device)
794 {
795 return 0;
796 }
797
798 static int __init register_tpacpi_subdriver(struct ibm_struct *ibm)
799 {
800 int rc;
801
802 dbg_printk(TPACPI_DBG_INIT,
803 "registering %s as an ACPI driver\n", ibm->name);
804
805 BUG_ON(!ibm->acpi);
806
807 ibm->acpi->driver = kzalloc(sizeof(struct acpi_driver), GFP_KERNEL);
808 if (!ibm->acpi->driver) {
809 pr_err("failed to allocate memory for ibm->acpi->driver\n");
810 return -ENOMEM;
811 }
812
813 sprintf(ibm->acpi->driver->name, "%s_%s", TPACPI_NAME, ibm->name);
814 ibm->acpi->driver->ids = ibm->acpi->hid;
815
816 ibm->acpi->driver->ops.add = &tpacpi_device_add;
817
818 rc = acpi_bus_register_driver(ibm->acpi->driver);
819 if (rc < 0) {
820 pr_err("acpi_bus_register_driver(%s) failed: %d\n",
821 ibm->name, rc);
822 kfree(ibm->acpi->driver);
823 ibm->acpi->driver = NULL;
824 } else if (!rc)
825 ibm->flags.acpi_driver_registered = 1;
826
827 return rc;
828 }
829
830
831 /****************************************************************************
832 ****************************************************************************
833 *
834 * Procfs Helpers
835 *
836 ****************************************************************************
837 ****************************************************************************/
838
839 static int dispatch_proc_show(struct seq_file *m, void *v)
840 {
841 struct ibm_struct *ibm = m->private;
842
843 if (!ibm || !ibm->read)
844 return -EINVAL;
845 return ibm->read(m);
846 }
847
848 static int dispatch_proc_open(struct inode *inode, struct file *file)
849 {
850 return single_open(file, dispatch_proc_show, PDE_DATA(inode));
851 }
852
853 static ssize_t dispatch_proc_write(struct file *file,
854 const char __user *userbuf,
855 size_t count, loff_t *pos)
856 {
857 struct ibm_struct *ibm = PDE_DATA(file_inode(file));
858 char *kernbuf;
859 int ret;
860
861 if (!ibm || !ibm->write)
862 return -EINVAL;
863 if (count > PAGE_SIZE - 2)
864 return -EINVAL;
865
866 kernbuf = kmalloc(count + 2, GFP_KERNEL);
867 if (!kernbuf)
868 return -ENOMEM;
869
870 if (copy_from_user(kernbuf, userbuf, count)) {
871 kfree(kernbuf);
872 return -EFAULT;
873 }
874
875 kernbuf[count] = 0;
876 strcat(kernbuf, ",");
877 ret = ibm->write(kernbuf);
878 if (ret == 0)
879 ret = count;
880
881 kfree(kernbuf);
882
883 return ret;
884 }
885
886 static const struct file_operations dispatch_proc_fops = {
887 .owner = THIS_MODULE,
888 .open = dispatch_proc_open,
889 .read = seq_read,
890 .llseek = seq_lseek,
891 .release = single_release,
892 .write = dispatch_proc_write,
893 };
894
895 static char *next_cmd(char **cmds)
896 {
897 char *start = *cmds;
898 char *end;
899
900 while ((end = strchr(start, ',')) && end == start)
901 start = end + 1;
902
903 if (!end)
904 return NULL;
905
906 *end = 0;
907 *cmds = end + 1;
908 return start;
909 }
910
911
912 /****************************************************************************
913 ****************************************************************************
914 *
915 * Device model: input, hwmon and platform
916 *
917 ****************************************************************************
918 ****************************************************************************/
919
920 static struct platform_device *tpacpi_pdev;
921 static struct platform_device *tpacpi_sensors_pdev;
922 static struct device *tpacpi_hwmon;
923 static struct input_dev *tpacpi_inputdev;
924 static struct mutex tpacpi_inputdev_send_mutex;
925 static LIST_HEAD(tpacpi_all_drivers);
926
927 #ifdef CONFIG_PM_SLEEP
928 static int tpacpi_suspend_handler(struct device *dev)
929 {
930 struct ibm_struct *ibm, *itmp;
931
932 list_for_each_entry_safe(ibm, itmp,
933 &tpacpi_all_drivers,
934 all_drivers) {
935 if (ibm->suspend)
936 (ibm->suspend)();
937 }
938
939 return 0;
940 }
941
942 static int tpacpi_resume_handler(struct device *dev)
943 {
944 struct ibm_struct *ibm, *itmp;
945
946 list_for_each_entry_safe(ibm, itmp,
947 &tpacpi_all_drivers,
948 all_drivers) {
949 if (ibm->resume)
950 (ibm->resume)();
951 }
952
953 return 0;
954 }
955 #endif
956
957 static SIMPLE_DEV_PM_OPS(tpacpi_pm,
958 tpacpi_suspend_handler, tpacpi_resume_handler);
959
960 static void tpacpi_shutdown_handler(struct platform_device *pdev)
961 {
962 struct ibm_struct *ibm, *itmp;
963
964 list_for_each_entry_safe(ibm, itmp,
965 &tpacpi_all_drivers,
966 all_drivers) {
967 if (ibm->shutdown)
968 (ibm->shutdown)();
969 }
970 }
971
972 static struct platform_driver tpacpi_pdriver = {
973 .driver = {
974 .name = TPACPI_DRVR_NAME,
975 .pm = &tpacpi_pm,
976 },
977 .shutdown = tpacpi_shutdown_handler,
978 };
979
980 static struct platform_driver tpacpi_hwmon_pdriver = {
981 .driver = {
982 .name = TPACPI_HWMON_DRVR_NAME,
983 },
984 };
985
986 /*************************************************************************
987 * sysfs support helpers
988 */
989
990 struct attribute_set {
991 unsigned int members, max_members;
992 struct attribute_group group;
993 };
994
995 struct attribute_set_obj {
996 struct attribute_set s;
997 struct attribute *a;
998 } __attribute__((packed));
999
1000 static struct attribute_set *create_attr_set(unsigned int max_members,
1001 const char *name)
1002 {
1003 struct attribute_set_obj *sobj;
1004
1005 if (max_members == 0)
1006 return NULL;
1007
1008 /* Allocates space for implicit NULL at the end too */
1009 sobj = kzalloc(sizeof(struct attribute_set_obj) +
1010 max_members * sizeof(struct attribute *),
1011 GFP_KERNEL);
1012 if (!sobj)
1013 return NULL;
1014 sobj->s.max_members = max_members;
1015 sobj->s.group.attrs = &sobj->a;
1016 sobj->s.group.name = name;
1017
1018 return &sobj->s;
1019 }
1020
1021 #define destroy_attr_set(_set) \
1022 kfree(_set);
1023
1024 /* not multi-threaded safe, use it in a single thread per set */
1025 static int add_to_attr_set(struct attribute_set *s, struct attribute *attr)
1026 {
1027 if (!s || !attr)
1028 return -EINVAL;
1029
1030 if (s->members >= s->max_members)
1031 return -ENOMEM;
1032
1033 s->group.attrs[s->members] = attr;
1034 s->members++;
1035
1036 return 0;
1037 }
1038
1039 static int add_many_to_attr_set(struct attribute_set *s,
1040 struct attribute **attr,
1041 unsigned int count)
1042 {
1043 int i, res;
1044
1045 for (i = 0; i < count; i++) {
1046 res = add_to_attr_set(s, attr[i]);
1047 if (res)
1048 return res;
1049 }
1050
1051 return 0;
1052 }
1053
1054 static void delete_attr_set(struct attribute_set *s, struct kobject *kobj)
1055 {
1056 sysfs_remove_group(kobj, &s->group);
1057 destroy_attr_set(s);
1058 }
1059
1060 #define register_attr_set_with_sysfs(_attr_set, _kobj) \
1061 sysfs_create_group(_kobj, &_attr_set->group)
1062
1063 static int parse_strtoul(const char *buf,
1064 unsigned long max, unsigned long *value)
1065 {
1066 char *endp;
1067
1068 *value = simple_strtoul(skip_spaces(buf), &endp, 0);
1069 endp = skip_spaces(endp);
1070 if (*endp || *value > max)
1071 return -EINVAL;
1072
1073 return 0;
1074 }
1075
1076 static void tpacpi_disable_brightness_delay(void)
1077 {
1078 if (acpi_evalf(hkey_handle, NULL, "PWMS", "qvd", 0))
1079 pr_notice("ACPI backlight control delay disabled\n");
1080 }
1081
1082 static void printk_deprecated_attribute(const char * const what,
1083 const char * const details)
1084 {
1085 tpacpi_log_usertask("deprecated sysfs attribute");
1086 pr_warn("WARNING: sysfs attribute %s is deprecated and "
1087 "will be removed. %s\n",
1088 what, details);
1089 }
1090
1091 /*************************************************************************
1092 * rfkill and radio control support helpers
1093 */
1094
1095 /*
1096 * ThinkPad-ACPI firmware handling model:
1097 *
1098 * WLSW (master wireless switch) is event-driven, and is common to all
1099 * firmware-controlled radios. It cannot be controlled, just monitored,
1100 * as expected. It overrides all radio state in firmware
1101 *
1102 * The kernel, a masked-off hotkey, and WLSW can change the radio state
1103 * (TODO: verify how WLSW interacts with the returned radio state).
1104 *
1105 * The only time there are shadow radio state changes, is when
1106 * masked-off hotkeys are used.
1107 */
1108
1109 /*
1110 * Internal driver API for radio state:
1111 *
1112 * int: < 0 = error, otherwise enum tpacpi_rfkill_state
1113 * bool: true means radio blocked (off)
1114 */
1115 enum tpacpi_rfkill_state {
1116 TPACPI_RFK_RADIO_OFF = 0,
1117 TPACPI_RFK_RADIO_ON
1118 };
1119
1120 /* rfkill switches */
1121 enum tpacpi_rfk_id {
1122 TPACPI_RFK_BLUETOOTH_SW_ID = 0,
1123 TPACPI_RFK_WWAN_SW_ID,
1124 TPACPI_RFK_UWB_SW_ID,
1125 TPACPI_RFK_SW_MAX
1126 };
1127
1128 static const char *tpacpi_rfkill_names[] = {
1129 [TPACPI_RFK_BLUETOOTH_SW_ID] = "bluetooth",
1130 [TPACPI_RFK_WWAN_SW_ID] = "wwan",
1131 [TPACPI_RFK_UWB_SW_ID] = "uwb",
1132 [TPACPI_RFK_SW_MAX] = NULL
1133 };
1134
1135 /* ThinkPad-ACPI rfkill subdriver */
1136 struct tpacpi_rfk {
1137 struct rfkill *rfkill;
1138 enum tpacpi_rfk_id id;
1139 const struct tpacpi_rfk_ops *ops;
1140 };
1141
1142 struct tpacpi_rfk_ops {
1143 /* firmware interface */
1144 int (*get_status)(void);
1145 int (*set_status)(const enum tpacpi_rfkill_state);
1146 };
1147
1148 static struct tpacpi_rfk *tpacpi_rfkill_switches[TPACPI_RFK_SW_MAX];
1149
1150 /* Query FW and update rfkill sw state for a given rfkill switch */
1151 static int tpacpi_rfk_update_swstate(const struct tpacpi_rfk *tp_rfk)
1152 {
1153 int status;
1154
1155 if (!tp_rfk)
1156 return -ENODEV;
1157
1158 status = (tp_rfk->ops->get_status)();
1159 if (status < 0)
1160 return status;
1161
1162 rfkill_set_sw_state(tp_rfk->rfkill,
1163 (status == TPACPI_RFK_RADIO_OFF));
1164
1165 return status;
1166 }
1167
1168 /* Query FW and update rfkill sw state for all rfkill switches */
1169 static void tpacpi_rfk_update_swstate_all(void)
1170 {
1171 unsigned int i;
1172
1173 for (i = 0; i < TPACPI_RFK_SW_MAX; i++)
1174 tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[i]);
1175 }
1176
1177 /*
1178 * Sync the HW-blocking state of all rfkill switches,
1179 * do notice it causes the rfkill core to schedule uevents
1180 */
1181 static void tpacpi_rfk_update_hwblock_state(bool blocked)
1182 {
1183 unsigned int i;
1184 struct tpacpi_rfk *tp_rfk;
1185
1186 for (i = 0; i < TPACPI_RFK_SW_MAX; i++) {
1187 tp_rfk = tpacpi_rfkill_switches[i];
1188 if (tp_rfk) {
1189 if (rfkill_set_hw_state(tp_rfk->rfkill,
1190 blocked)) {
1191 /* ignore -- we track sw block */
1192 }
1193 }
1194 }
1195 }
1196
1197 /* Call to get the WLSW state from the firmware */
1198 static int hotkey_get_wlsw(void);
1199
1200 /* Call to query WLSW state and update all rfkill switches */
1201 static bool tpacpi_rfk_check_hwblock_state(void)
1202 {
1203 int res = hotkey_get_wlsw();
1204 int hw_blocked;
1205
1206 /* When unknown or unsupported, we have to assume it is unblocked */
1207 if (res < 0)
1208 return false;
1209
1210 hw_blocked = (res == TPACPI_RFK_RADIO_OFF);
1211 tpacpi_rfk_update_hwblock_state(hw_blocked);
1212
1213 return hw_blocked;
1214 }
1215
1216 static int tpacpi_rfk_hook_set_block(void *data, bool blocked)
1217 {
1218 struct tpacpi_rfk *tp_rfk = data;
1219 int res;
1220
1221 dbg_printk(TPACPI_DBG_RFKILL,
1222 "request to change radio state to %s\n",
1223 blocked ? "blocked" : "unblocked");
1224
1225 /* try to set radio state */
1226 res = (tp_rfk->ops->set_status)(blocked ?
1227 TPACPI_RFK_RADIO_OFF : TPACPI_RFK_RADIO_ON);
1228
1229 /* and update the rfkill core with whatever the FW really did */
1230 tpacpi_rfk_update_swstate(tp_rfk);
1231
1232 return (res < 0) ? res : 0;
1233 }
1234
1235 static const struct rfkill_ops tpacpi_rfk_rfkill_ops = {
1236 .set_block = tpacpi_rfk_hook_set_block,
1237 };
1238
1239 static int __init tpacpi_new_rfkill(const enum tpacpi_rfk_id id,
1240 const struct tpacpi_rfk_ops *tp_rfkops,
1241 const enum rfkill_type rfktype,
1242 const char *name,
1243 const bool set_default)
1244 {
1245 struct tpacpi_rfk *atp_rfk;
1246 int res;
1247 bool sw_state = false;
1248 bool hw_state;
1249 int sw_status;
1250
1251 BUG_ON(id >= TPACPI_RFK_SW_MAX || tpacpi_rfkill_switches[id]);
1252
1253 atp_rfk = kzalloc(sizeof(struct tpacpi_rfk), GFP_KERNEL);
1254 if (atp_rfk)
1255 atp_rfk->rfkill = rfkill_alloc(name,
1256 &tpacpi_pdev->dev,
1257 rfktype,
1258 &tpacpi_rfk_rfkill_ops,
1259 atp_rfk);
1260 if (!atp_rfk || !atp_rfk->rfkill) {
1261 pr_err("failed to allocate memory for rfkill class\n");
1262 kfree(atp_rfk);
1263 return -ENOMEM;
1264 }
1265
1266 atp_rfk->id = id;
1267 atp_rfk->ops = tp_rfkops;
1268
1269 sw_status = (tp_rfkops->get_status)();
1270 if (sw_status < 0) {
1271 pr_err("failed to read initial state for %s, error %d\n",
1272 name, sw_status);
1273 } else {
1274 sw_state = (sw_status == TPACPI_RFK_RADIO_OFF);
1275 if (set_default) {
1276 /* try to keep the initial state, since we ask the
1277 * firmware to preserve it across S5 in NVRAM */
1278 rfkill_init_sw_state(atp_rfk->rfkill, sw_state);
1279 }
1280 }
1281 hw_state = tpacpi_rfk_check_hwblock_state();
1282 rfkill_set_hw_state(atp_rfk->rfkill, hw_state);
1283
1284 res = rfkill_register(atp_rfk->rfkill);
1285 if (res < 0) {
1286 pr_err("failed to register %s rfkill switch: %d\n", name, res);
1287 rfkill_destroy(atp_rfk->rfkill);
1288 kfree(atp_rfk);
1289 return res;
1290 }
1291
1292 tpacpi_rfkill_switches[id] = atp_rfk;
1293
1294 pr_info("rfkill switch %s: radio is %sblocked\n",
1295 name, (sw_state || hw_state) ? "" : "un");
1296 return 0;
1297 }
1298
1299 static void tpacpi_destroy_rfkill(const enum tpacpi_rfk_id id)
1300 {
1301 struct tpacpi_rfk *tp_rfk;
1302
1303 BUG_ON(id >= TPACPI_RFK_SW_MAX);
1304
1305 tp_rfk = tpacpi_rfkill_switches[id];
1306 if (tp_rfk) {
1307 rfkill_unregister(tp_rfk->rfkill);
1308 rfkill_destroy(tp_rfk->rfkill);
1309 tpacpi_rfkill_switches[id] = NULL;
1310 kfree(tp_rfk);
1311 }
1312 }
1313
1314 static void printk_deprecated_rfkill_attribute(const char * const what)
1315 {
1316 printk_deprecated_attribute(what,
1317 "Please switch to generic rfkill before year 2010");
1318 }
1319
1320 /* sysfs <radio> enable ------------------------------------------------ */
1321 static ssize_t tpacpi_rfk_sysfs_enable_show(const enum tpacpi_rfk_id id,
1322 struct device_attribute *attr,
1323 char *buf)
1324 {
1325 int status;
1326
1327 printk_deprecated_rfkill_attribute(attr->attr.name);
1328
1329 /* This is in the ABI... */
1330 if (tpacpi_rfk_check_hwblock_state()) {
1331 status = TPACPI_RFK_RADIO_OFF;
1332 } else {
1333 status = tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]);
1334 if (status < 0)
1335 return status;
1336 }
1337
1338 return snprintf(buf, PAGE_SIZE, "%d\n",
1339 (status == TPACPI_RFK_RADIO_ON) ? 1 : 0);
1340 }
1341
1342 static ssize_t tpacpi_rfk_sysfs_enable_store(const enum tpacpi_rfk_id id,
1343 struct device_attribute *attr,
1344 const char *buf, size_t count)
1345 {
1346 unsigned long t;
1347 int res;
1348
1349 printk_deprecated_rfkill_attribute(attr->attr.name);
1350
1351 if (parse_strtoul(buf, 1, &t))
1352 return -EINVAL;
1353
1354 tpacpi_disclose_usertask(attr->attr.name, "set to %ld\n", t);
1355
1356 /* This is in the ABI... */
1357 if (tpacpi_rfk_check_hwblock_state() && !!t)
1358 return -EPERM;
1359
1360 res = tpacpi_rfkill_switches[id]->ops->set_status((!!t) ?
1361 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF);
1362 tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]);
1363
1364 return (res < 0) ? res : count;
1365 }
1366
1367 /* procfs -------------------------------------------------------------- */
1368 static int tpacpi_rfk_procfs_read(const enum tpacpi_rfk_id id, struct seq_file *m)
1369 {
1370 if (id >= TPACPI_RFK_SW_MAX)
1371 seq_printf(m, "status:\t\tnot supported\n");
1372 else {
1373 int status;
1374
1375 /* This is in the ABI... */
1376 if (tpacpi_rfk_check_hwblock_state()) {
1377 status = TPACPI_RFK_RADIO_OFF;
1378 } else {
1379 status = tpacpi_rfk_update_swstate(
1380 tpacpi_rfkill_switches[id]);
1381 if (status < 0)
1382 return status;
1383 }
1384
1385 seq_printf(m, "status:\t\t%s\n",
1386 (status == TPACPI_RFK_RADIO_ON) ?
1387 "enabled" : "disabled");
1388 seq_printf(m, "commands:\tenable, disable\n");
1389 }
1390
1391 return 0;
1392 }
1393
1394 static int tpacpi_rfk_procfs_write(const enum tpacpi_rfk_id id, char *buf)
1395 {
1396 char *cmd;
1397 int status = -1;
1398 int res = 0;
1399
1400 if (id >= TPACPI_RFK_SW_MAX)
1401 return -ENODEV;
1402
1403 while ((cmd = next_cmd(&buf))) {
1404 if (strlencmp(cmd, "enable") == 0)
1405 status = TPACPI_RFK_RADIO_ON;
1406 else if (strlencmp(cmd, "disable") == 0)
1407 status = TPACPI_RFK_RADIO_OFF;
1408 else
1409 return -EINVAL;
1410 }
1411
1412 if (status != -1) {
1413 tpacpi_disclose_usertask("procfs", "attempt to %s %s\n",
1414 (status == TPACPI_RFK_RADIO_ON) ?
1415 "enable" : "disable",
1416 tpacpi_rfkill_names[id]);
1417 res = (tpacpi_rfkill_switches[id]->ops->set_status)(status);
1418 tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]);
1419 }
1420
1421 return res;
1422 }
1423
1424 /*************************************************************************
1425 * thinkpad-acpi driver attributes
1426 */
1427
1428 /* interface_version --------------------------------------------------- */
1429 static ssize_t tpacpi_driver_interface_version_show(
1430 struct device_driver *drv,
1431 char *buf)
1432 {
1433 return snprintf(buf, PAGE_SIZE, "0x%08x\n", TPACPI_SYSFS_VERSION);
1434 }
1435
1436 static DRIVER_ATTR(interface_version, S_IRUGO,
1437 tpacpi_driver_interface_version_show, NULL);
1438
1439 /* debug_level --------------------------------------------------------- */
1440 static ssize_t tpacpi_driver_debug_show(struct device_driver *drv,
1441 char *buf)
1442 {
1443 return snprintf(buf, PAGE_SIZE, "0x%04x\n", dbg_level);
1444 }
1445
1446 static ssize_t tpacpi_driver_debug_store(struct device_driver *drv,
1447 const char *buf, size_t count)
1448 {
1449 unsigned long t;
1450
1451 if (parse_strtoul(buf, 0xffff, &t))
1452 return -EINVAL;
1453
1454 dbg_level = t;
1455
1456 return count;
1457 }
1458
1459 static DRIVER_ATTR(debug_level, S_IWUSR | S_IRUGO,
1460 tpacpi_driver_debug_show, tpacpi_driver_debug_store);
1461
1462 /* version ------------------------------------------------------------- */
1463 static ssize_t tpacpi_driver_version_show(struct device_driver *drv,
1464 char *buf)
1465 {
1466 return snprintf(buf, PAGE_SIZE, "%s v%s\n",
1467 TPACPI_DESC, TPACPI_VERSION);
1468 }
1469
1470 static DRIVER_ATTR(version, S_IRUGO,
1471 tpacpi_driver_version_show, NULL);
1472
1473 /* --------------------------------------------------------------------- */
1474
1475 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
1476
1477 /* wlsw_emulstate ------------------------------------------------------ */
1478 static ssize_t tpacpi_driver_wlsw_emulstate_show(struct device_driver *drv,
1479 char *buf)
1480 {
1481 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_wlsw_emulstate);
1482 }
1483
1484 static ssize_t tpacpi_driver_wlsw_emulstate_store(struct device_driver *drv,
1485 const char *buf, size_t count)
1486 {
1487 unsigned long t;
1488
1489 if (parse_strtoul(buf, 1, &t))
1490 return -EINVAL;
1491
1492 if (tpacpi_wlsw_emulstate != !!t) {
1493 tpacpi_wlsw_emulstate = !!t;
1494 tpacpi_rfk_update_hwblock_state(!t); /* negative logic */
1495 }
1496
1497 return count;
1498 }
1499
1500 static DRIVER_ATTR(wlsw_emulstate, S_IWUSR | S_IRUGO,
1501 tpacpi_driver_wlsw_emulstate_show,
1502 tpacpi_driver_wlsw_emulstate_store);
1503
1504 /* bluetooth_emulstate ------------------------------------------------- */
1505 static ssize_t tpacpi_driver_bluetooth_emulstate_show(
1506 struct device_driver *drv,
1507 char *buf)
1508 {
1509 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_bluetooth_emulstate);
1510 }
1511
1512 static ssize_t tpacpi_driver_bluetooth_emulstate_store(
1513 struct device_driver *drv,
1514 const char *buf, size_t count)
1515 {
1516 unsigned long t;
1517
1518 if (parse_strtoul(buf, 1, &t))
1519 return -EINVAL;
1520
1521 tpacpi_bluetooth_emulstate = !!t;
1522
1523 return count;
1524 }
1525
1526 static DRIVER_ATTR(bluetooth_emulstate, S_IWUSR | S_IRUGO,
1527 tpacpi_driver_bluetooth_emulstate_show,
1528 tpacpi_driver_bluetooth_emulstate_store);
1529
1530 /* wwan_emulstate ------------------------------------------------- */
1531 static ssize_t tpacpi_driver_wwan_emulstate_show(
1532 struct device_driver *drv,
1533 char *buf)
1534 {
1535 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_wwan_emulstate);
1536 }
1537
1538 static ssize_t tpacpi_driver_wwan_emulstate_store(
1539 struct device_driver *drv,
1540 const char *buf, size_t count)
1541 {
1542 unsigned long t;
1543
1544 if (parse_strtoul(buf, 1, &t))
1545 return -EINVAL;
1546
1547 tpacpi_wwan_emulstate = !!t;
1548
1549 return count;
1550 }
1551
1552 static DRIVER_ATTR(wwan_emulstate, S_IWUSR | S_IRUGO,
1553 tpacpi_driver_wwan_emulstate_show,
1554 tpacpi_driver_wwan_emulstate_store);
1555
1556 /* uwb_emulstate ------------------------------------------------- */
1557 static ssize_t tpacpi_driver_uwb_emulstate_show(
1558 struct device_driver *drv,
1559 char *buf)
1560 {
1561 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_uwb_emulstate);
1562 }
1563
1564 static ssize_t tpacpi_driver_uwb_emulstate_store(
1565 struct device_driver *drv,
1566 const char *buf, size_t count)
1567 {
1568 unsigned long t;
1569
1570 if (parse_strtoul(buf, 1, &t))
1571 return -EINVAL;
1572
1573 tpacpi_uwb_emulstate = !!t;
1574
1575 return count;
1576 }
1577
1578 static DRIVER_ATTR(uwb_emulstate, S_IWUSR | S_IRUGO,
1579 tpacpi_driver_uwb_emulstate_show,
1580 tpacpi_driver_uwb_emulstate_store);
1581 #endif
1582
1583 /* --------------------------------------------------------------------- */
1584
1585 static struct driver_attribute *tpacpi_driver_attributes[] = {
1586 &driver_attr_debug_level, &driver_attr_version,
1587 &driver_attr_interface_version,
1588 };
1589
1590 static int __init tpacpi_create_driver_attributes(struct device_driver *drv)
1591 {
1592 int i, res;
1593
1594 i = 0;
1595 res = 0;
1596 while (!res && i < ARRAY_SIZE(tpacpi_driver_attributes)) {
1597 res = driver_create_file(drv, tpacpi_driver_attributes[i]);
1598 i++;
1599 }
1600
1601 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
1602 if (!res && dbg_wlswemul)
1603 res = driver_create_file(drv, &driver_attr_wlsw_emulstate);
1604 if (!res && dbg_bluetoothemul)
1605 res = driver_create_file(drv, &driver_attr_bluetooth_emulstate);
1606 if (!res && dbg_wwanemul)
1607 res = driver_create_file(drv, &driver_attr_wwan_emulstate);
1608 if (!res && dbg_uwbemul)
1609 res = driver_create_file(drv, &driver_attr_uwb_emulstate);
1610 #endif
1611
1612 return res;
1613 }
1614
1615 static void tpacpi_remove_driver_attributes(struct device_driver *drv)
1616 {
1617 int i;
1618
1619 for (i = 0; i < ARRAY_SIZE(tpacpi_driver_attributes); i++)
1620 driver_remove_file(drv, tpacpi_driver_attributes[i]);
1621
1622 #ifdef THINKPAD_ACPI_DEBUGFACILITIES
1623 driver_remove_file(drv, &driver_attr_wlsw_emulstate);
1624 driver_remove_file(drv, &driver_attr_bluetooth_emulstate);
1625 driver_remove_file(drv, &driver_attr_wwan_emulstate);
1626 driver_remove_file(drv, &driver_attr_uwb_emulstate);
1627 #endif
1628 }
1629
1630 /*************************************************************************
1631 * Firmware Data
1632 */
1633
1634 /*
1635 * Table of recommended minimum BIOS versions
1636 *
1637 * Reasons for listing:
1638 * 1. Stable BIOS, listed because the unknown amount of
1639 * bugs and bad ACPI behaviour on older versions
1640 *
1641 * 2. BIOS or EC fw with known bugs that trigger on Linux
1642 *
1643 * 3. BIOS with known reduced functionality in older versions
1644 *
1645 * We recommend the latest BIOS and EC version.
1646 * We only support the latest BIOS and EC fw version as a rule.
1647 *
1648 * Sources: IBM ThinkPad Public Web Documents (update changelogs),
1649 * Information from users in ThinkWiki
1650 *
1651 * WARNING: we use this table also to detect that the machine is
1652 * a ThinkPad in some cases, so don't remove entries lightly.
1653 */
1654
1655 #define TPV_Q(__v, __id1, __id2, __bv1, __bv2) \
1656 { .vendor = (__v), \
1657 .bios = TPID(__id1, __id2), \
1658 .ec = TPACPI_MATCH_ANY, \
1659 .quirks = TPACPI_MATCH_ANY << 16 \
1660 | (__bv1) << 8 | (__bv2) }
1661
1662 #define TPV_Q_X(__v, __bid1, __bid2, __bv1, __bv2, \
1663 __eid, __ev1, __ev2) \
1664 { .vendor = (__v), \
1665 .bios = TPID(__bid1, __bid2), \
1666 .ec = __eid, \
1667 .quirks = (__ev1) << 24 | (__ev2) << 16 \
1668 | (__bv1) << 8 | (__bv2) }
1669
1670 #define TPV_QI0(__id1, __id2, __bv1, __bv2) \
1671 TPV_Q(PCI_VENDOR_ID_IBM, __id1, __id2, __bv1, __bv2)
1672
1673 /* Outdated IBM BIOSes often lack the EC id string */
1674 #define TPV_QI1(__id1, __id2, __bv1, __bv2, __ev1, __ev2) \
1675 TPV_Q_X(PCI_VENDOR_ID_IBM, __id1, __id2, \
1676 __bv1, __bv2, TPID(__id1, __id2), \
1677 __ev1, __ev2), \
1678 TPV_Q_X(PCI_VENDOR_ID_IBM, __id1, __id2, \
1679 __bv1, __bv2, TPACPI_MATCH_UNKNOWN, \
1680 __ev1, __ev2)
1681
1682 /* Outdated IBM BIOSes often lack the EC id string */
1683 #define TPV_QI2(__bid1, __bid2, __bv1, __bv2, \
1684 __eid1, __eid2, __ev1, __ev2) \
1685 TPV_Q_X(PCI_VENDOR_ID_IBM, __bid1, __bid2, \
1686 __bv1, __bv2, TPID(__eid1, __eid2), \
1687 __ev1, __ev2), \
1688 TPV_Q_X(PCI_VENDOR_ID_IBM, __bid1, __bid2, \
1689 __bv1, __bv2, TPACPI_MATCH_UNKNOWN, \
1690 __ev1, __ev2)
1691
1692 #define TPV_QL0(__id1, __id2, __bv1, __bv2) \
1693 TPV_Q(PCI_VENDOR_ID_LENOVO, __id1, __id2, __bv1, __bv2)
1694
1695 #define TPV_QL1(__id1, __id2, __bv1, __bv2, __ev1, __ev2) \
1696 TPV_Q_X(PCI_VENDOR_ID_LENOVO, __id1, __id2, \
1697 __bv1, __bv2, TPID(__id1, __id2), \
1698 __ev1, __ev2)
1699
1700 #define TPV_QL2(__bid1, __bid2, __bv1, __bv2, \
1701 __eid1, __eid2, __ev1, __ev2) \
1702 TPV_Q_X(PCI_VENDOR_ID_LENOVO, __bid1, __bid2, \
1703 __bv1, __bv2, TPID(__eid1, __eid2), \
1704 __ev1, __ev2)
1705
1706 static const struct tpacpi_quirk tpacpi_bios_version_qtable[] __initconst = {
1707 /* Numeric models ------------------ */
1708 /* FW MODEL BIOS VERS */
1709 TPV_QI0('I', 'M', '6', '5'), /* 570 */
1710 TPV_QI0('I', 'U', '2', '6'), /* 570E */
1711 TPV_QI0('I', 'B', '5', '4'), /* 600 */
1712 TPV_QI0('I', 'H', '4', '7'), /* 600E */
1713 TPV_QI0('I', 'N', '3', '6'), /* 600E */
1714 TPV_QI0('I', 'T', '5', '5'), /* 600X */
1715 TPV_QI0('I', 'D', '4', '8'), /* 770, 770E, 770ED */
1716 TPV_QI0('I', 'I', '4', '2'), /* 770X */
1717 TPV_QI0('I', 'O', '2', '3'), /* 770Z */
1718
1719 /* A-series ------------------------- */
1720 /* FW MODEL BIOS VERS EC VERS */
1721 TPV_QI0('I', 'W', '5', '9'), /* A20m */
1722 TPV_QI0('I', 'V', '6', '9'), /* A20p */
1723 TPV_QI0('1', '0', '2', '6'), /* A21e, A22e */
1724 TPV_QI0('K', 'U', '3', '6'), /* A21e */
1725 TPV_QI0('K', 'X', '3', '6'), /* A21m, A22m */
1726 TPV_QI0('K', 'Y', '3', '8'), /* A21p, A22p */
1727 TPV_QI0('1', 'B', '1', '7'), /* A22e */
1728 TPV_QI0('1', '3', '2', '0'), /* A22m */
1729 TPV_QI0('1', 'E', '7', '3'), /* A30/p (0) */
1730 TPV_QI1('1', 'G', '4', '1', '1', '7'), /* A31/p (0) */
1731 TPV_QI1('1', 'N', '1', '6', '0', '7'), /* A31/p (0) */
1732
1733 /* G-series ------------------------- */
1734 /* FW MODEL BIOS VERS */
1735 TPV_QI0('1', 'T', 'A', '6'), /* G40 */
1736 TPV_QI0('1', 'X', '5', '7'), /* G41 */
1737
1738 /* R-series, T-series --------------- */
1739 /* FW MODEL BIOS VERS EC VERS */
1740 TPV_QI0('1', 'C', 'F', '0'), /* R30 */
1741 TPV_QI0('1', 'F', 'F', '1'), /* R31 */
1742 TPV_QI0('1', 'M', '9', '7'), /* R32 */
1743 TPV_QI0('1', 'O', '6', '1'), /* R40 */
1744 TPV_QI0('1', 'P', '6', '5'), /* R40 */
1745 TPV_QI0('1', 'S', '7', '0'), /* R40e */
1746 TPV_QI1('1', 'R', 'D', 'R', '7', '1'), /* R50/p, R51,
1747 T40/p, T41/p, T42/p (1) */
1748 TPV_QI1('1', 'V', '7', '1', '2', '8'), /* R50e, R51 (1) */
1749 TPV_QI1('7', '8', '7', '1', '0', '6'), /* R51e (1) */
1750 TPV_QI1('7', '6', '6', '9', '1', '6'), /* R52 (1) */
1751 TPV_QI1('7', '0', '6', '9', '2', '8'), /* R52, T43 (1) */
1752
1753 TPV_QI0('I', 'Y', '6', '1'), /* T20 */
1754 TPV_QI0('K', 'Z', '3', '4'), /* T21 */
1755 TPV_QI0('1', '6', '3', '2'), /* T22 */
1756 TPV_QI1('1', 'A', '6', '4', '2', '3'), /* T23 (0) */
1757 TPV_QI1('1', 'I', '7', '1', '2', '0'), /* T30 (0) */
1758 TPV_QI1('1', 'Y', '6', '5', '2', '9'), /* T43/p (1) */
1759
1760 TPV_QL1('7', '9', 'E', '3', '5', '0'), /* T60/p */
1761 TPV_QL1('7', 'C', 'D', '2', '2', '2'), /* R60, R60i */
1762 TPV_QL1('7', 'E', 'D', '0', '1', '5'), /* R60e, R60i */
1763
1764 /* BIOS FW BIOS VERS EC FW EC VERS */
1765 TPV_QI2('1', 'W', '9', '0', '1', 'V', '2', '8'), /* R50e (1) */
1766 TPV_QL2('7', 'I', '3', '4', '7', '9', '5', '0'), /* T60/p wide */
1767
1768 /* X-series ------------------------- */
1769 /* FW MODEL BIOS VERS EC VERS */
1770 TPV_QI0('I', 'Z', '9', 'D'), /* X20, X21 */
1771 TPV_QI0('1', 'D', '7', '0'), /* X22, X23, X24 */
1772 TPV_QI1('1', 'K', '4', '8', '1', '8'), /* X30 (0) */
1773 TPV_QI1('1', 'Q', '9', '7', '2', '3'), /* X31, X32 (0) */
1774 TPV_QI1('1', 'U', 'D', '3', 'B', '2'), /* X40 (0) */
1775 TPV_QI1('7', '4', '6', '4', '2', '7'), /* X41 (0) */
1776 TPV_QI1('7', '5', '6', '0', '2', '0'), /* X41t (0) */
1777
1778 TPV_QL1('7', 'B', 'D', '7', '4', '0'), /* X60/s */
1779 TPV_QL1('7', 'J', '3', '0', '1', '3'), /* X60t */
1780
1781 /* (0) - older versions lack DMI EC fw string and functionality */
1782 /* (1) - older versions known to lack functionality */
1783 };
1784
1785 #undef TPV_QL1
1786 #undef TPV_QL0
1787 #undef TPV_QI2
1788 #undef TPV_QI1
1789 #undef TPV_QI0
1790 #undef TPV_Q_X
1791 #undef TPV_Q
1792
1793 static void __init tpacpi_check_outdated_fw(void)
1794 {
1795 unsigned long fwvers;
1796 u16 ec_version, bios_version;
1797
1798 fwvers = tpacpi_check_quirks(tpacpi_bios_version_qtable,
1799 ARRAY_SIZE(tpacpi_bios_version_qtable));
1800
1801 if (!fwvers)
1802 return;
1803
1804 bios_version = fwvers & 0xffffU;
1805 ec_version = (fwvers >> 16) & 0xffffU;
1806
1807 /* note that unknown versions are set to 0x0000 and we use that */
1808 if ((bios_version > thinkpad_id.bios_release) ||
1809 (ec_version > thinkpad_id.ec_release &&
1810 ec_version != TPACPI_MATCH_ANY)) {
1811 /*
1812 * The changelogs would let us track down the exact
1813 * reason, but it is just too much of a pain to track
1814 * it. We only list BIOSes that are either really
1815 * broken, or really stable to begin with, so it is
1816 * best if the user upgrades the firmware anyway.
1817 */
1818 pr_warn("WARNING: Outdated ThinkPad BIOS/EC firmware\n");
1819 pr_warn("WARNING: This firmware may be missing critical bug "
1820 "fixes and/or important features\n");
1821 }
1822 }
1823
1824 static bool __init tpacpi_is_fw_known(void)
1825 {
1826 return tpacpi_check_quirks(tpacpi_bios_version_qtable,
1827 ARRAY_SIZE(tpacpi_bios_version_qtable)) != 0;
1828 }
1829
1830 /****************************************************************************
1831 ****************************************************************************
1832 *
1833 * Subdrivers
1834 *
1835 ****************************************************************************
1836 ****************************************************************************/
1837
1838 /*************************************************************************
1839 * thinkpad-acpi metadata subdriver
1840 */
1841
1842 static int thinkpad_acpi_driver_read(struct seq_file *m)
1843 {
1844 seq_printf(m, "driver:\t\t%s\n", TPACPI_DESC);
1845 seq_printf(m, "version:\t%s\n", TPACPI_VERSION);
1846 return 0;
1847 }
1848
1849 static struct ibm_struct thinkpad_acpi_driver_data = {
1850 .name = "driver",
1851 .read = thinkpad_acpi_driver_read,
1852 };
1853
1854 /*************************************************************************
1855 * Hotkey subdriver
1856 */
1857
1858 /*
1859 * ThinkPad firmware event model
1860 *
1861 * The ThinkPad firmware has two main event interfaces: normal ACPI
1862 * notifications (which follow the ACPI standard), and a private event
1863 * interface.
1864 *
1865 * The private event interface also issues events for the hotkeys. As
1866 * the driver gained features, the event handling code ended up being
1867 * built around the hotkey subdriver. This will need to be refactored
1868 * to a more formal event API eventually.
1869 *
1870 * Some "hotkeys" are actually supposed to be used as event reports,
1871 * such as "brightness has changed", "volume has changed", depending on
1872 * the ThinkPad model and how the firmware is operating.
1873 *
1874 * Unlike other classes, hotkey-class events have mask/unmask control on
1875 * non-ancient firmware. However, how it behaves changes a lot with the
1876 * firmware model and version.
1877 */
1878
1879 enum { /* hot key scan codes (derived from ACPI DSDT) */
1880 TP_ACPI_HOTKEYSCAN_FNF1 = 0,
1881 TP_ACPI_HOTKEYSCAN_FNF2,
1882 TP_ACPI_HOTKEYSCAN_FNF3,
1883 TP_ACPI_HOTKEYSCAN_FNF4,
1884 TP_ACPI_HOTKEYSCAN_FNF5,
1885 TP_ACPI_HOTKEYSCAN_FNF6,
1886 TP_ACPI_HOTKEYSCAN_FNF7,
1887 TP_ACPI_HOTKEYSCAN_FNF8,
1888 TP_ACPI_HOTKEYSCAN_FNF9,
1889 TP_ACPI_HOTKEYSCAN_FNF10,
1890 TP_ACPI_HOTKEYSCAN_FNF11,
1891 TP_ACPI_HOTKEYSCAN_FNF12,
1892 TP_ACPI_HOTKEYSCAN_FNBACKSPACE,
1893 TP_ACPI_HOTKEYSCAN_FNINSERT,
1894 TP_ACPI_HOTKEYSCAN_FNDELETE,
1895 TP_ACPI_HOTKEYSCAN_FNHOME,
1896 TP_ACPI_HOTKEYSCAN_FNEND,
1897 TP_ACPI_HOTKEYSCAN_FNPAGEUP,
1898 TP_ACPI_HOTKEYSCAN_FNPAGEDOWN,
1899 TP_ACPI_HOTKEYSCAN_FNSPACE,
1900 TP_ACPI_HOTKEYSCAN_VOLUMEUP,
1901 TP_ACPI_HOTKEYSCAN_VOLUMEDOWN,
1902 TP_ACPI_HOTKEYSCAN_MUTE,
1903 TP_ACPI_HOTKEYSCAN_THINKPAD,
1904 TP_ACPI_HOTKEYSCAN_UNK1,
1905 TP_ACPI_HOTKEYSCAN_UNK2,
1906 TP_ACPI_HOTKEYSCAN_UNK3,
1907 TP_ACPI_HOTKEYSCAN_UNK4,
1908 TP_ACPI_HOTKEYSCAN_UNK5,
1909 TP_ACPI_HOTKEYSCAN_UNK6,
1910 TP_ACPI_HOTKEYSCAN_UNK7,
1911 TP_ACPI_HOTKEYSCAN_UNK8,
1912
1913 /* Hotkey keymap size */
1914 TPACPI_HOTKEY_MAP_LEN
1915 };
1916
1917 enum { /* Keys/events available through NVRAM polling */
1918 TPACPI_HKEY_NVRAM_KNOWN_MASK = 0x00fb88c0U,
1919 TPACPI_HKEY_NVRAM_GOOD_MASK = 0x00fb8000U,
1920 };
1921
1922 enum { /* Positions of some of the keys in hotkey masks */
1923 TP_ACPI_HKEY_DISPSWTCH_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF7,
1924 TP_ACPI_HKEY_DISPXPAND_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF8,
1925 TP_ACPI_HKEY_HIBERNATE_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF12,
1926 TP_ACPI_HKEY_BRGHTUP_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNHOME,
1927 TP_ACPI_HKEY_BRGHTDWN_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNEND,
1928 TP_ACPI_HKEY_THNKLGHT_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNPAGEUP,
1929 TP_ACPI_HKEY_ZOOM_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNSPACE,
1930 TP_ACPI_HKEY_VOLUP_MASK = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEUP,
1931 TP_ACPI_HKEY_VOLDWN_MASK = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEDOWN,
1932 TP_ACPI_HKEY_MUTE_MASK = 1 << TP_ACPI_HOTKEYSCAN_MUTE,
1933 TP_ACPI_HKEY_THINKPAD_MASK = 1 << TP_ACPI_HOTKEYSCAN_THINKPAD,
1934 };
1935
1936 enum { /* NVRAM to ACPI HKEY group map */
1937 TP_NVRAM_HKEY_GROUP_HK2 = TP_ACPI_HKEY_THINKPAD_MASK |
1938 TP_ACPI_HKEY_ZOOM_MASK |
1939 TP_ACPI_HKEY_DISPSWTCH_MASK |
1940 TP_ACPI_HKEY_HIBERNATE_MASK,
1941 TP_NVRAM_HKEY_GROUP_BRIGHTNESS = TP_ACPI_HKEY_BRGHTUP_MASK |
1942 TP_ACPI_HKEY_BRGHTDWN_MASK,
1943 TP_NVRAM_HKEY_GROUP_VOLUME = TP_ACPI_HKEY_VOLUP_MASK |
1944 TP_ACPI_HKEY_VOLDWN_MASK |
1945 TP_ACPI_HKEY_MUTE_MASK,
1946 };
1947
1948 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1949 struct tp_nvram_state {
1950 u16 thinkpad_toggle:1;
1951 u16 zoom_toggle:1;
1952 u16 display_toggle:1;
1953 u16 thinklight_toggle:1;
1954 u16 hibernate_toggle:1;
1955 u16 displayexp_toggle:1;
1956 u16 display_state:1;
1957 u16 brightness_toggle:1;
1958 u16 volume_toggle:1;
1959 u16 mute:1;
1960
1961 u8 brightness_level;
1962 u8 volume_level;
1963 };
1964
1965 /* kthread for the hotkey poller */
1966 static struct task_struct *tpacpi_hotkey_task;
1967
1968 /*
1969 * Acquire mutex to write poller control variables as an
1970 * atomic block.
1971 *
1972 * Increment hotkey_config_change when changing them if you
1973 * want the kthread to forget old state.
1974 *
1975 * See HOTKEY_CONFIG_CRITICAL_START/HOTKEY_CONFIG_CRITICAL_END
1976 */
1977 static struct mutex hotkey_thread_data_mutex;
1978 static unsigned int hotkey_config_change;
1979
1980 /*
1981 * hotkey poller control variables
1982 *
1983 * Must be atomic or readers will also need to acquire mutex
1984 *
1985 * HOTKEY_CONFIG_CRITICAL_START/HOTKEY_CONFIG_CRITICAL_END
1986 * should be used only when the changes need to be taken as
1987 * a block, OR when one needs to force the kthread to forget
1988 * old state.
1989 */
1990 static u32 hotkey_source_mask; /* bit mask 0=ACPI,1=NVRAM */
1991 static unsigned int hotkey_poll_freq = 10; /* Hz */
1992
1993 #define HOTKEY_CONFIG_CRITICAL_START \
1994 do { \
1995 mutex_lock(&hotkey_thread_data_mutex); \
1996 hotkey_config_change++; \
1997 } while (0);
1998 #define HOTKEY_CONFIG_CRITICAL_END \
1999 mutex_unlock(&hotkey_thread_data_mutex);
2000
2001 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2002
2003 #define hotkey_source_mask 0U
2004 #define HOTKEY_CONFIG_CRITICAL_START
2005 #define HOTKEY_CONFIG_CRITICAL_END
2006
2007 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2008
2009 static struct mutex hotkey_mutex;
2010
2011 static enum { /* Reasons for waking up */
2012 TP_ACPI_WAKEUP_NONE = 0, /* None or unknown */
2013 TP_ACPI_WAKEUP_BAYEJ, /* Bay ejection request */
2014 TP_ACPI_WAKEUP_UNDOCK, /* Undock request */
2015 } hotkey_wakeup_reason;
2016
2017 static int hotkey_autosleep_ack;
2018
2019 static u32 hotkey_orig_mask; /* events the BIOS had enabled */
2020 static u32 hotkey_all_mask; /* all events supported in fw */
2021 static u32 hotkey_reserved_mask; /* events better left disabled */
2022 static u32 hotkey_driver_mask; /* events needed by the driver */
2023 static u32 hotkey_user_mask; /* events visible to userspace */
2024 static u32 hotkey_acpi_mask; /* events enabled in firmware */
2025
2026 static u16 *hotkey_keycode_map;
2027
2028 static struct attribute_set *hotkey_dev_attributes;
2029
2030 static void tpacpi_driver_event(const unsigned int hkey_event);
2031 static void hotkey_driver_event(const unsigned int scancode);
2032 static void hotkey_poll_setup(const bool may_warn);
2033
2034 /* HKEY.MHKG() return bits */
2035 #define TP_HOTKEY_TABLET_MASK (1 << 3)
2036
2037 static int hotkey_get_wlsw(void)
2038 {
2039 int status;
2040
2041 if (!tp_features.hotkey_wlsw)
2042 return -ENODEV;
2043
2044 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
2045 if (dbg_wlswemul)
2046 return (tpacpi_wlsw_emulstate) ?
2047 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
2048 #endif
2049
2050 if (!acpi_evalf(hkey_handle, &status, "WLSW", "d"))
2051 return -EIO;
2052
2053 return (status) ? TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
2054 }
2055
2056 static int hotkey_get_tablet_mode(int *status)
2057 {
2058 int s;
2059
2060 if (!acpi_evalf(hkey_handle, &s, "MHKG", "d"))
2061 return -EIO;
2062
2063 *status = ((s & TP_HOTKEY_TABLET_MASK) != 0);
2064 return 0;
2065 }
2066
2067 /*
2068 * Reads current event mask from firmware, and updates
2069 * hotkey_acpi_mask accordingly. Also resets any bits
2070 * from hotkey_user_mask that are unavailable to be
2071 * delivered (shadow requirement of the userspace ABI).
2072 *
2073 * Call with hotkey_mutex held
2074 */
2075 static int hotkey_mask_get(void)
2076 {
2077 if (tp_features.hotkey_mask) {
2078 u32 m = 0;
2079
2080 if (!acpi_evalf(hkey_handle, &m, "DHKN", "d"))
2081 return -EIO;
2082
2083 hotkey_acpi_mask = m;
2084 } else {
2085 /* no mask support doesn't mean no event support... */
2086 hotkey_acpi_mask = hotkey_all_mask;
2087 }
2088
2089 /* sync userspace-visible mask */
2090 hotkey_user_mask &= (hotkey_acpi_mask | hotkey_source_mask);
2091
2092 return 0;
2093 }
2094
2095 void static hotkey_mask_warn_incomplete_mask(void)
2096 {
2097 /* log only what the user can fix... */
2098 const u32 wantedmask = hotkey_driver_mask &
2099 ~(hotkey_acpi_mask | hotkey_source_mask) &
2100 (hotkey_all_mask | TPACPI_HKEY_NVRAM_KNOWN_MASK);
2101
2102 if (wantedmask)
2103 pr_notice("required events 0x%08x not enabled!\n", wantedmask);
2104 }
2105
2106 /*
2107 * Set the firmware mask when supported
2108 *
2109 * Also calls hotkey_mask_get to update hotkey_acpi_mask.
2110 *
2111 * NOTE: does not set bits in hotkey_user_mask, but may reset them.
2112 *
2113 * Call with hotkey_mutex held
2114 */
2115 static int hotkey_mask_set(u32 mask)
2116 {
2117 int i;
2118 int rc = 0;
2119
2120 const u32 fwmask = mask & ~hotkey_source_mask;
2121
2122 if (tp_features.hotkey_mask) {
2123 for (i = 0; i < 32; i++) {
2124 if (!acpi_evalf(hkey_handle,
2125 NULL, "MHKM", "vdd", i + 1,
2126 !!(mask & (1 << i)))) {
2127 rc = -EIO;
2128 break;
2129 }
2130 }
2131 }
2132
2133 /*
2134 * We *must* make an inconditional call to hotkey_mask_get to
2135 * refresh hotkey_acpi_mask and update hotkey_user_mask
2136 *
2137 * Take the opportunity to also log when we cannot _enable_
2138 * a given event.
2139 */
2140 if (!hotkey_mask_get() && !rc && (fwmask & ~hotkey_acpi_mask)) {
2141 pr_notice("asked for hotkey mask 0x%08x, but "
2142 "firmware forced it to 0x%08x\n",
2143 fwmask, hotkey_acpi_mask);
2144 }
2145
2146 if (tpacpi_lifecycle != TPACPI_LIFE_EXITING)
2147 hotkey_mask_warn_incomplete_mask();
2148
2149 return rc;
2150 }
2151
2152 /*
2153 * Sets hotkey_user_mask and tries to set the firmware mask
2154 *
2155 * Call with hotkey_mutex held
2156 */
2157 static int hotkey_user_mask_set(const u32 mask)
2158 {
2159 int rc;
2160
2161 /* Give people a chance to notice they are doing something that
2162 * is bound to go boom on their users sooner or later */
2163 if (!tp_warned.hotkey_mask_ff &&
2164 (mask == 0xffff || mask == 0xffffff ||
2165 mask == 0xffffffff)) {
2166 tp_warned.hotkey_mask_ff = 1;
2167 pr_notice("setting the hotkey mask to 0x%08x is likely "
2168 "not the best way to go about it\n", mask);
2169 pr_notice("please consider using the driver defaults, "
2170 "and refer to up-to-date thinkpad-acpi "
2171 "documentation\n");
2172 }
2173
2174 /* Try to enable what the user asked for, plus whatever we need.
2175 * this syncs everything but won't enable bits in hotkey_user_mask */
2176 rc = hotkey_mask_set((mask | hotkey_driver_mask) & ~hotkey_source_mask);
2177
2178 /* Enable the available bits in hotkey_user_mask */
2179 hotkey_user_mask = mask & (hotkey_acpi_mask | hotkey_source_mask);
2180
2181 return rc;
2182 }
2183
2184 /*
2185 * Sets the driver hotkey mask.
2186 *
2187 * Can be called even if the hotkey subdriver is inactive
2188 */
2189 static int tpacpi_hotkey_driver_mask_set(const u32 mask)
2190 {
2191 int rc;
2192
2193 /* Do the right thing if hotkey_init has not been called yet */
2194 if (!tp_features.hotkey) {
2195 hotkey_driver_mask = mask;
2196 return 0;
2197 }
2198
2199 mutex_lock(&hotkey_mutex);
2200
2201 HOTKEY_CONFIG_CRITICAL_START
2202 hotkey_driver_mask = mask;
2203 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2204 hotkey_source_mask |= (mask & ~hotkey_all_mask);
2205 #endif
2206 HOTKEY_CONFIG_CRITICAL_END
2207
2208 rc = hotkey_mask_set((hotkey_acpi_mask | hotkey_driver_mask) &
2209 ~hotkey_source_mask);
2210 hotkey_poll_setup(true);
2211
2212 mutex_unlock(&hotkey_mutex);
2213
2214 return rc;
2215 }
2216
2217 static int hotkey_status_get(int *status)
2218 {
2219 if (!acpi_evalf(hkey_handle, status, "DHKC", "d"))
2220 return -EIO;
2221
2222 return 0;
2223 }
2224
2225 static int hotkey_status_set(bool enable)
2226 {
2227 if (!acpi_evalf(hkey_handle, NULL, "MHKC", "vd", enable ? 1 : 0))
2228 return -EIO;
2229
2230 return 0;
2231 }
2232
2233 static void tpacpi_input_send_tabletsw(void)
2234 {
2235 int state;
2236
2237 if (tp_features.hotkey_tablet &&
2238 !hotkey_get_tablet_mode(&state)) {
2239 mutex_lock(&tpacpi_inputdev_send_mutex);
2240
2241 input_report_switch(tpacpi_inputdev,
2242 SW_TABLET_MODE, !!state);
2243 input_sync(tpacpi_inputdev);
2244
2245 mutex_unlock(&tpacpi_inputdev_send_mutex);
2246 }
2247 }
2248
2249 /* Do NOT call without validating scancode first */
2250 static void tpacpi_input_send_key(const unsigned int scancode)
2251 {
2252 const unsigned int keycode = hotkey_keycode_map[scancode];
2253
2254 if (keycode != KEY_RESERVED) {
2255 mutex_lock(&tpacpi_inputdev_send_mutex);
2256
2257 input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN, scancode);
2258 input_report_key(tpacpi_inputdev, keycode, 1);
2259 input_sync(tpacpi_inputdev);
2260
2261 input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN, scancode);
2262 input_report_key(tpacpi_inputdev, keycode, 0);
2263 input_sync(tpacpi_inputdev);
2264
2265 mutex_unlock(&tpacpi_inputdev_send_mutex);
2266 }
2267 }
2268
2269 /* Do NOT call without validating scancode first */
2270 static void tpacpi_input_send_key_masked(const unsigned int scancode)
2271 {
2272 hotkey_driver_event(scancode);
2273 if (hotkey_user_mask & (1 << scancode))
2274 tpacpi_input_send_key(scancode);
2275 }
2276
2277 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2278 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver;
2279
2280 /* Do NOT call without validating scancode first */
2281 static void tpacpi_hotkey_send_key(unsigned int scancode)
2282 {
2283 tpacpi_input_send_key_masked(scancode);
2284 }
2285
2286 static void hotkey_read_nvram(struct tp_nvram_state *n, const u32 m)
2287 {
2288 u8 d;
2289
2290 if (m & TP_NVRAM_HKEY_GROUP_HK2) {
2291 d = nvram_read_byte(TP_NVRAM_ADDR_HK2);
2292 n->thinkpad_toggle = !!(d & TP_NVRAM_MASK_HKT_THINKPAD);
2293 n->zoom_toggle = !!(d & TP_NVRAM_MASK_HKT_ZOOM);
2294 n->display_toggle = !!(d & TP_NVRAM_MASK_HKT_DISPLAY);
2295 n->hibernate_toggle = !!(d & TP_NVRAM_MASK_HKT_HIBERNATE);
2296 }
2297 if (m & TP_ACPI_HKEY_THNKLGHT_MASK) {
2298 d = nvram_read_byte(TP_NVRAM_ADDR_THINKLIGHT);
2299 n->thinklight_toggle = !!(d & TP_NVRAM_MASK_THINKLIGHT);
2300 }
2301 if (m & TP_ACPI_HKEY_DISPXPAND_MASK) {
2302 d = nvram_read_byte(TP_NVRAM_ADDR_VIDEO);
2303 n->displayexp_toggle =
2304 !!(d & TP_NVRAM_MASK_HKT_DISPEXPND);
2305 }
2306 if (m & TP_NVRAM_HKEY_GROUP_BRIGHTNESS) {
2307 d = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS);
2308 n->brightness_level = (d & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
2309 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
2310 n->brightness_toggle =
2311 !!(d & TP_NVRAM_MASK_HKT_BRIGHTNESS);
2312 }
2313 if (m & TP_NVRAM_HKEY_GROUP_VOLUME) {
2314 d = nvram_read_byte(TP_NVRAM_ADDR_MIXER);
2315 n->volume_level = (d & TP_NVRAM_MASK_LEVEL_VOLUME)
2316 >> TP_NVRAM_POS_LEVEL_VOLUME;
2317 n->mute = !!(d & TP_NVRAM_MASK_MUTE);
2318 n->volume_toggle = !!(d & TP_NVRAM_MASK_HKT_VOLUME);
2319 }
2320 }
2321
2322 #define TPACPI_COMPARE_KEY(__scancode, __member) \
2323 do { \
2324 if ((event_mask & (1 << __scancode)) && \
2325 oldn->__member != newn->__member) \
2326 tpacpi_hotkey_send_key(__scancode); \
2327 } while (0)
2328
2329 #define TPACPI_MAY_SEND_KEY(__scancode) \
2330 do { \
2331 if (event_mask & (1 << __scancode)) \
2332 tpacpi_hotkey_send_key(__scancode); \
2333 } while (0)
2334
2335 static void issue_volchange(const unsigned int oldvol,
2336 const unsigned int newvol,
2337 const u32 event_mask)
2338 {
2339 unsigned int i = oldvol;
2340
2341 while (i > newvol) {
2342 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
2343 i--;
2344 }
2345 while (i < newvol) {
2346 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
2347 i++;
2348 }
2349 }
2350
2351 static void issue_brightnesschange(const unsigned int oldbrt,
2352 const unsigned int newbrt,
2353 const u32 event_mask)
2354 {
2355 unsigned int i = oldbrt;
2356
2357 while (i > newbrt) {
2358 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
2359 i--;
2360 }
2361 while (i < newbrt) {
2362 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
2363 i++;
2364 }
2365 }
2366
2367 static void hotkey_compare_and_issue_event(struct tp_nvram_state *oldn,
2368 struct tp_nvram_state *newn,
2369 const u32 event_mask)
2370 {
2371
2372 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_THINKPAD, thinkpad_toggle);
2373 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNSPACE, zoom_toggle);
2374 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF7, display_toggle);
2375 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF12, hibernate_toggle);
2376
2377 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNPAGEUP, thinklight_toggle);
2378
2379 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF8, displayexp_toggle);
2380
2381 /*
2382 * Handle volume
2383 *
2384 * This code is supposed to duplicate the IBM firmware behaviour:
2385 * - Pressing MUTE issues mute hotkey message, even when already mute
2386 * - Pressing Volume up/down issues volume up/down hotkey messages,
2387 * even when already at maximum or minimum volume
2388 * - The act of unmuting issues volume up/down notification,
2389 * depending which key was used to unmute
2390 *
2391 * We are constrained to what the NVRAM can tell us, which is not much
2392 * and certainly not enough if more than one volume hotkey was pressed
2393 * since the last poll cycle.
2394 *
2395 * Just to make our life interesting, some newer Lenovo ThinkPads have
2396 * bugs in the BIOS and may fail to update volume_toggle properly.
2397 */
2398 if (newn->mute) {
2399 /* muted */
2400 if (!oldn->mute ||
2401 oldn->volume_toggle != newn->volume_toggle ||
2402 oldn->volume_level != newn->volume_level) {
2403 /* recently muted, or repeated mute keypress, or
2404 * multiple presses ending in mute */
2405 issue_volchange(oldn->volume_level, newn->volume_level,
2406 event_mask);
2407 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE);
2408 }
2409 } else {
2410 /* unmute */
2411 if (oldn->mute) {
2412 /* recently unmuted, issue 'unmute' keypress */
2413 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
2414 }
2415 if (oldn->volume_level != newn->volume_level) {
2416 issue_volchange(oldn->volume_level, newn->volume_level,
2417 event_mask);
2418 } else if (oldn->volume_toggle != newn->volume_toggle) {
2419 /* repeated vol up/down keypress at end of scale ? */
2420 if (newn->volume_level == 0)
2421 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
2422 else if (newn->volume_level >= TP_NVRAM_LEVEL_VOLUME_MAX)
2423 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
2424 }
2425 }
2426
2427 /* handle brightness */
2428 if (oldn->brightness_level != newn->brightness_level) {
2429 issue_brightnesschange(oldn->brightness_level,
2430 newn->brightness_level, event_mask);
2431 } else if (oldn->brightness_toggle != newn->brightness_toggle) {
2432 /* repeated key presses that didn't change state */
2433 if (newn->brightness_level == 0)
2434 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
2435 else if (newn->brightness_level >= bright_maxlvl
2436 && !tp_features.bright_unkfw)
2437 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
2438 }
2439
2440 #undef TPACPI_COMPARE_KEY
2441 #undef TPACPI_MAY_SEND_KEY
2442 }
2443
2444 /*
2445 * Polling driver
2446 *
2447 * We track all events in hotkey_source_mask all the time, since
2448 * most of them are edge-based. We only issue those requested by
2449 * hotkey_user_mask or hotkey_driver_mask, though.
2450 */
2451 static int hotkey_kthread(void *data)
2452 {
2453 struct tp_nvram_state s[2];
2454 u32 poll_mask, event_mask;
2455 unsigned int si, so;
2456 unsigned long t;
2457 unsigned int change_detector;
2458 unsigned int poll_freq;
2459 bool was_frozen;
2460
2461 if (tpacpi_lifecycle == TPACPI_LIFE_EXITING)
2462 goto exit;
2463
2464 set_freezable();
2465
2466 so = 0;
2467 si = 1;
2468 t = 0;
2469
2470 /* Initial state for compares */
2471 mutex_lock(&hotkey_thread_data_mutex);
2472 change_detector = hotkey_config_change;
2473 poll_mask = hotkey_source_mask;
2474 event_mask = hotkey_source_mask &
2475 (hotkey_driver_mask | hotkey_user_mask);
2476 poll_freq = hotkey_poll_freq;
2477 mutex_unlock(&hotkey_thread_data_mutex);
2478 hotkey_read_nvram(&s[so], poll_mask);
2479
2480 while (!kthread_should_stop()) {
2481 if (t == 0) {
2482 if (likely(poll_freq))
2483 t = 1000/poll_freq;
2484 else
2485 t = 100; /* should never happen... */
2486 }
2487 t = msleep_interruptible(t);
2488 if (unlikely(kthread_freezable_should_stop(&was_frozen)))
2489 break;
2490
2491 if (t > 0 && !was_frozen)
2492 continue;
2493
2494 mutex_lock(&hotkey_thread_data_mutex);
2495 if (was_frozen || hotkey_config_change != change_detector) {
2496 /* forget old state on thaw or config change */
2497 si = so;
2498 t = 0;
2499 change_detector = hotkey_config_change;
2500 }
2501 poll_mask = hotkey_source_mask;
2502 event_mask = hotkey_source_mask &
2503 (hotkey_driver_mask | hotkey_user_mask);
2504 poll_freq = hotkey_poll_freq;
2505 mutex_unlock(&hotkey_thread_data_mutex);
2506
2507 if (likely(poll_mask)) {
2508 hotkey_read_nvram(&s[si], poll_mask);
2509 if (likely(si != so)) {
2510 hotkey_compare_and_issue_event(&s[so], &s[si],
2511 event_mask);
2512 }
2513 }
2514
2515 so = si;
2516 si ^= 1;
2517 }
2518
2519 exit:
2520 return 0;
2521 }
2522
2523 /* call with hotkey_mutex held */
2524 static void hotkey_poll_stop_sync(void)
2525 {
2526 if (tpacpi_hotkey_task) {
2527 kthread_stop(tpacpi_hotkey_task);
2528 tpacpi_hotkey_task = NULL;
2529 }
2530 }
2531
2532 /* call with hotkey_mutex held */
2533 static void hotkey_poll_setup(const bool may_warn)
2534 {
2535 const u32 poll_driver_mask = hotkey_driver_mask & hotkey_source_mask;
2536 const u32 poll_user_mask = hotkey_user_mask & hotkey_source_mask;
2537
2538 if (hotkey_poll_freq > 0 &&
2539 (poll_driver_mask ||
2540 (poll_user_mask && tpacpi_inputdev->users > 0))) {
2541 if (!tpacpi_hotkey_task) {
2542 tpacpi_hotkey_task = kthread_run(hotkey_kthread,
2543 NULL, TPACPI_NVRAM_KTHREAD_NAME);
2544 if (IS_ERR(tpacpi_hotkey_task)) {
2545 tpacpi_hotkey_task = NULL;
2546 pr_err("could not create kernel thread "
2547 "for hotkey polling\n");
2548 }
2549 }
2550 } else {
2551 hotkey_poll_stop_sync();
2552 if (may_warn && (poll_driver_mask || poll_user_mask) &&
2553 hotkey_poll_freq == 0) {
2554 pr_notice("hot keys 0x%08x and/or events 0x%08x "
2555 "require polling, which is currently "
2556 "disabled\n",
2557 poll_user_mask, poll_driver_mask);
2558 }
2559 }
2560 }
2561
2562 static void hotkey_poll_setup_safe(const bool may_warn)
2563 {
2564 mutex_lock(&hotkey_mutex);
2565 hotkey_poll_setup(may_warn);
2566 mutex_unlock(&hotkey_mutex);
2567 }
2568
2569 /* call with hotkey_mutex held */
2570 static void hotkey_poll_set_freq(unsigned int freq)
2571 {
2572 if (!freq)
2573 hotkey_poll_stop_sync();
2574
2575 hotkey_poll_freq = freq;
2576 }
2577
2578 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2579
2580 static void hotkey_poll_setup(const bool __unused)
2581 {
2582 }
2583
2584 static void hotkey_poll_setup_safe(const bool __unused)
2585 {
2586 }
2587
2588 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2589
2590 static int hotkey_inputdev_open(struct input_dev *dev)
2591 {
2592 switch (tpacpi_lifecycle) {
2593 case TPACPI_LIFE_INIT:
2594 case TPACPI_LIFE_RUNNING:
2595 hotkey_poll_setup_safe(false);
2596 return 0;
2597 case TPACPI_LIFE_EXITING:
2598 return -EBUSY;
2599 }
2600
2601 /* Should only happen if tpacpi_lifecycle is corrupt */
2602 BUG();
2603 return -EBUSY;
2604 }
2605
2606 static void hotkey_inputdev_close(struct input_dev *dev)
2607 {
2608 /* disable hotkey polling when possible */
2609 if (tpacpi_lifecycle != TPACPI_LIFE_EXITING &&
2610 !(hotkey_source_mask & hotkey_driver_mask))
2611 hotkey_poll_setup_safe(false);
2612 }
2613
2614 /* sysfs hotkey enable ------------------------------------------------- */
2615 static ssize_t hotkey_enable_show(struct device *dev,
2616 struct device_attribute *attr,
2617 char *buf)
2618 {
2619 int res, status;
2620
2621 printk_deprecated_attribute("hotkey_enable",
2622 "Hotkey reporting is always enabled");
2623
2624 res = hotkey_status_get(&status);
2625 if (res)
2626 return res;
2627
2628 return snprintf(buf, PAGE_SIZE, "%d\n", status);
2629 }
2630
2631 static ssize_t hotkey_enable_store(struct device *dev,
2632 struct device_attribute *attr,
2633 const char *buf, size_t count)
2634 {
2635 unsigned long t;
2636
2637 printk_deprecated_attribute("hotkey_enable",
2638 "Hotkeys can be disabled through hotkey_mask");
2639
2640 if (parse_strtoul(buf, 1, &t))
2641 return -EINVAL;
2642
2643 if (t == 0)
2644 return -EPERM;
2645
2646 return count;
2647 }
2648
2649 static struct device_attribute dev_attr_hotkey_enable =
2650 __ATTR(hotkey_enable, S_IWUSR | S_IRUGO,
2651 hotkey_enable_show, hotkey_enable_store);
2652
2653 /* sysfs hotkey mask --------------------------------------------------- */
2654 static ssize_t hotkey_mask_show(struct device *dev,
2655 struct device_attribute *attr,
2656 char *buf)
2657 {
2658 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_user_mask);
2659 }
2660
2661 static ssize_t hotkey_mask_store(struct device *dev,
2662 struct device_attribute *attr,
2663 const char *buf, size_t count)
2664 {
2665 unsigned long t;
2666 int res;
2667
2668 if (parse_strtoul(buf, 0xffffffffUL, &t))
2669 return -EINVAL;
2670
2671 if (mutex_lock_killable(&hotkey_mutex))
2672 return -ERESTARTSYS;
2673
2674 res = hotkey_user_mask_set(t);
2675
2676 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2677 hotkey_poll_setup(true);
2678 #endif
2679
2680 mutex_unlock(&hotkey_mutex);
2681
2682 tpacpi_disclose_usertask("hotkey_mask", "set to 0x%08lx\n", t);
2683
2684 return (res) ? res : count;
2685 }
2686
2687 static struct device_attribute dev_attr_hotkey_mask =
2688 __ATTR(hotkey_mask, S_IWUSR | S_IRUGO,
2689 hotkey_mask_show, hotkey_mask_store);
2690
2691 /* sysfs hotkey bios_enabled ------------------------------------------- */
2692 static ssize_t hotkey_bios_enabled_show(struct device *dev,
2693 struct device_attribute *attr,
2694 char *buf)
2695 {
2696 return sprintf(buf, "0\n");
2697 }
2698
2699 static struct device_attribute dev_attr_hotkey_bios_enabled =
2700 __ATTR(hotkey_bios_enabled, S_IRUGO, hotkey_bios_enabled_show, NULL);
2701
2702 /* sysfs hotkey bios_mask ---------------------------------------------- */
2703 static ssize_t hotkey_bios_mask_show(struct device *dev,
2704 struct device_attribute *attr,
2705 char *buf)
2706 {
2707 printk_deprecated_attribute("hotkey_bios_mask",
2708 "This attribute is useless.");
2709 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_orig_mask);
2710 }
2711
2712 static struct device_attribute dev_attr_hotkey_bios_mask =
2713 __ATTR(hotkey_bios_mask, S_IRUGO, hotkey_bios_mask_show, NULL);
2714
2715 /* sysfs hotkey all_mask ----------------------------------------------- */
2716 static ssize_t hotkey_all_mask_show(struct device *dev,
2717 struct device_attribute *attr,
2718 char *buf)
2719 {
2720 return snprintf(buf, PAGE_SIZE, "0x%08x\n",
2721 hotkey_all_mask | hotkey_source_mask);
2722 }
2723
2724 static struct device_attribute dev_attr_hotkey_all_mask =
2725 __ATTR(hotkey_all_mask, S_IRUGO, hotkey_all_mask_show, NULL);
2726
2727 /* sysfs hotkey recommended_mask --------------------------------------- */
2728 static ssize_t hotkey_recommended_mask_show(struct device *dev,
2729 struct device_attribute *attr,
2730 char *buf)
2731 {
2732 return snprintf(buf, PAGE_SIZE, "0x%08x\n",
2733 (hotkey_all_mask | hotkey_source_mask)
2734 & ~hotkey_reserved_mask);
2735 }
2736
2737 static struct device_attribute dev_attr_hotkey_recommended_mask =
2738 __ATTR(hotkey_recommended_mask, S_IRUGO,
2739 hotkey_recommended_mask_show, NULL);
2740
2741 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2742
2743 /* sysfs hotkey hotkey_source_mask ------------------------------------- */
2744 static ssize_t hotkey_source_mask_show(struct device *dev,
2745 struct device_attribute *attr,
2746 char *buf)
2747 {
2748 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_source_mask);
2749 }
2750
2751 static ssize_t hotkey_source_mask_store(struct device *dev,
2752 struct device_attribute *attr,
2753 const char *buf, size_t count)
2754 {
2755 unsigned long t;
2756 u32 r_ev;
2757 int rc;
2758
2759 if (parse_strtoul(buf, 0xffffffffUL, &t) ||
2760 ((t & ~TPACPI_HKEY_NVRAM_KNOWN_MASK) != 0))
2761 return -EINVAL;
2762
2763 if (mutex_lock_killable(&hotkey_mutex))
2764 return -ERESTARTSYS;
2765
2766 HOTKEY_CONFIG_CRITICAL_START
2767 hotkey_source_mask = t;
2768 HOTKEY_CONFIG_CRITICAL_END
2769
2770 rc = hotkey_mask_set((hotkey_user_mask | hotkey_driver_mask) &
2771 ~hotkey_source_mask);
2772 hotkey_poll_setup(true);
2773
2774 /* check if events needed by the driver got disabled */
2775 r_ev = hotkey_driver_mask & ~(hotkey_acpi_mask & hotkey_all_mask)
2776 & ~hotkey_source_mask & TPACPI_HKEY_NVRAM_KNOWN_MASK;
2777
2778 mutex_unlock(&hotkey_mutex);
2779
2780 if (rc < 0)
2781 pr_err("hotkey_source_mask: "
2782 "failed to update the firmware event mask!\n");
2783
2784 if (r_ev)
2785 pr_notice("hotkey_source_mask: "
2786 "some important events were disabled: 0x%04x\n",
2787 r_ev);
2788
2789 tpacpi_disclose_usertask("hotkey_source_mask", "set to 0x%08lx\n", t);
2790
2791 return (rc < 0) ? rc : count;
2792 }
2793
2794 static struct device_attribute dev_attr_hotkey_source_mask =
2795 __ATTR(hotkey_source_mask, S_IWUSR | S_IRUGO,
2796 hotkey_source_mask_show, hotkey_source_mask_store);
2797
2798 /* sysfs hotkey hotkey_poll_freq --------------------------------------- */
2799 static ssize_t hotkey_poll_freq_show(struct device *dev,
2800 struct device_attribute *attr,
2801 char *buf)
2802 {
2803 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_poll_freq);
2804 }
2805
2806 static ssize_t hotkey_poll_freq_store(struct device *dev,
2807 struct device_attribute *attr,
2808 const char *buf, size_t count)
2809 {
2810 unsigned long t;
2811
2812 if (parse_strtoul(buf, 25, &t))
2813 return -EINVAL;
2814
2815 if (mutex_lock_killable(&hotkey_mutex))
2816 return -ERESTARTSYS;
2817
2818 hotkey_poll_set_freq(t);
2819 hotkey_poll_setup(true);
2820
2821 mutex_unlock(&hotkey_mutex);
2822
2823 tpacpi_disclose_usertask("hotkey_poll_freq", "set to %lu\n", t);
2824
2825 return count;
2826 }
2827
2828 static struct device_attribute dev_attr_hotkey_poll_freq =
2829 __ATTR(hotkey_poll_freq, S_IWUSR | S_IRUGO,
2830 hotkey_poll_freq_show, hotkey_poll_freq_store);
2831
2832 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2833
2834 /* sysfs hotkey radio_sw (pollable) ------------------------------------ */
2835 static ssize_t hotkey_radio_sw_show(struct device *dev,
2836 struct device_attribute *attr,
2837 char *buf)
2838 {
2839 int res;
2840 res = hotkey_get_wlsw();
2841 if (res < 0)
2842 return res;
2843
2844 /* Opportunistic update */
2845 tpacpi_rfk_update_hwblock_state((res == TPACPI_RFK_RADIO_OFF));
2846
2847 return snprintf(buf, PAGE_SIZE, "%d\n",
2848 (res == TPACPI_RFK_RADIO_OFF) ? 0 : 1);
2849 }
2850
2851 static struct device_attribute dev_attr_hotkey_radio_sw =
2852 __ATTR(hotkey_radio_sw, S_IRUGO, hotkey_radio_sw_show, NULL);
2853
2854 static void hotkey_radio_sw_notify_change(void)
2855 {
2856 if (tp_features.hotkey_wlsw)
2857 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2858 "hotkey_radio_sw");
2859 }
2860
2861 /* sysfs hotkey tablet mode (pollable) --------------------------------- */
2862 static ssize_t hotkey_tablet_mode_show(struct device *dev,
2863 struct device_attribute *attr,
2864 char *buf)
2865 {
2866 int res, s;
2867 res = hotkey_get_tablet_mode(&s);
2868 if (res < 0)
2869 return res;
2870
2871 return snprintf(buf, PAGE_SIZE, "%d\n", !!s);
2872 }
2873
2874 static struct device_attribute dev_attr_hotkey_tablet_mode =
2875 __ATTR(hotkey_tablet_mode, S_IRUGO, hotkey_tablet_mode_show, NULL);
2876
2877 static void hotkey_tablet_mode_notify_change(void)
2878 {
2879 if (tp_features.hotkey_tablet)
2880 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2881 "hotkey_tablet_mode");
2882 }
2883
2884 /* sysfs wakeup reason (pollable) -------------------------------------- */
2885 static ssize_t hotkey_wakeup_reason_show(struct device *dev,
2886 struct device_attribute *attr,
2887 char *buf)
2888 {
2889 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_wakeup_reason);
2890 }
2891
2892 static struct device_attribute dev_attr_hotkey_wakeup_reason =
2893 __ATTR(wakeup_reason, S_IRUGO, hotkey_wakeup_reason_show, NULL);
2894
2895 static void hotkey_wakeup_reason_notify_change(void)
2896 {
2897 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2898 "wakeup_reason");
2899 }
2900
2901 /* sysfs wakeup hotunplug_complete (pollable) -------------------------- */
2902 static ssize_t hotkey_wakeup_hotunplug_complete_show(struct device *dev,
2903 struct device_attribute *attr,
2904 char *buf)
2905 {
2906 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_autosleep_ack);
2907 }
2908
2909 static struct device_attribute dev_attr_hotkey_wakeup_hotunplug_complete =
2910 __ATTR(wakeup_hotunplug_complete, S_IRUGO,
2911 hotkey_wakeup_hotunplug_complete_show, NULL);
2912
2913 static void hotkey_wakeup_hotunplug_complete_notify_change(void)
2914 {
2915 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2916 "wakeup_hotunplug_complete");
2917 }
2918
2919 /* --------------------------------------------------------------------- */
2920
2921 static struct attribute *hotkey_attributes[] __initdata = {
2922 &dev_attr_hotkey_enable.attr,
2923 &dev_attr_hotkey_bios_enabled.attr,
2924 &dev_attr_hotkey_bios_mask.attr,
2925 &dev_attr_hotkey_wakeup_reason.attr,
2926 &dev_attr_hotkey_wakeup_hotunplug_complete.attr,
2927 &dev_attr_hotkey_mask.attr,
2928 &dev_attr_hotkey_all_mask.attr,
2929 &dev_attr_hotkey_recommended_mask.attr,
2930 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2931 &dev_attr_hotkey_source_mask.attr,
2932 &dev_attr_hotkey_poll_freq.attr,
2933 #endif
2934 };
2935
2936 /*
2937 * Sync both the hw and sw blocking state of all switches
2938 */
2939 static void tpacpi_send_radiosw_update(void)
2940 {
2941 int wlsw;
2942
2943 /*
2944 * We must sync all rfkill controllers *before* issuing any
2945 * rfkill input events, or we will race the rfkill core input
2946 * handler.
2947 *
2948 * tpacpi_inputdev_send_mutex works as a synchronization point
2949 * for the above.
2950 *
2951 * We optimize to avoid numerous calls to hotkey_get_wlsw.
2952 */
2953
2954 wlsw = hotkey_get_wlsw();
2955
2956 /* Sync hw blocking state first if it is hw-blocked */
2957 if (wlsw == TPACPI_RFK_RADIO_OFF)
2958 tpacpi_rfk_update_hwblock_state(true);
2959
2960 /* Sync sw blocking state */
2961 tpacpi_rfk_update_swstate_all();
2962
2963 /* Sync hw blocking state last if it is hw-unblocked */
2964 if (wlsw == TPACPI_RFK_RADIO_ON)
2965 tpacpi_rfk_update_hwblock_state(false);
2966
2967 /* Issue rfkill input event for WLSW switch */
2968 if (!(wlsw < 0)) {
2969 mutex_lock(&tpacpi_inputdev_send_mutex);
2970
2971 input_report_switch(tpacpi_inputdev,
2972 SW_RFKILL_ALL, (wlsw > 0));
2973 input_sync(tpacpi_inputdev);
2974
2975 mutex_unlock(&tpacpi_inputdev_send_mutex);
2976 }
2977
2978 /*
2979 * this can be unconditional, as we will poll state again
2980 * if userspace uses the notify to read data
2981 */
2982 hotkey_radio_sw_notify_change();
2983 }
2984
2985 static void hotkey_exit(void)
2986 {
2987 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2988 mutex_lock(&hotkey_mutex);
2989 hotkey_poll_stop_sync();
2990 mutex_unlock(&hotkey_mutex);
2991 #endif
2992
2993 if (hotkey_dev_attributes)
2994 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
2995
2996 dbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_HKEY,
2997 "restoring original HKEY status and mask\n");
2998 /* yes, there is a bitwise or below, we want the
2999 * functions to be called even if one of them fail */
3000 if (((tp_features.hotkey_mask &&
3001 hotkey_mask_set(hotkey_orig_mask)) |
3002 hotkey_status_set(false)) != 0)
3003 pr_err("failed to restore hot key mask "
3004 "to BIOS defaults\n");
3005 }
3006
3007 static void __init hotkey_unmap(const unsigned int scancode)
3008 {
3009 if (hotkey_keycode_map[scancode] != KEY_RESERVED) {
3010 clear_bit(hotkey_keycode_map[scancode],
3011 tpacpi_inputdev->keybit);
3012 hotkey_keycode_map[scancode] = KEY_RESERVED;
3013 }
3014 }
3015
3016 /*
3017 * HKEY quirks:
3018 * TPACPI_HK_Q_INIMASK: Supports FN+F3,FN+F4,FN+F12
3019 */
3020
3021 #define TPACPI_HK_Q_INIMASK 0x0001
3022
3023 static const struct tpacpi_quirk tpacpi_hotkey_qtable[] __initconst = {
3024 TPACPI_Q_IBM('I', 'H', TPACPI_HK_Q_INIMASK), /* 600E */
3025 TPACPI_Q_IBM('I', 'N', TPACPI_HK_Q_INIMASK), /* 600E */
3026 TPACPI_Q_IBM('I', 'D', TPACPI_HK_Q_INIMASK), /* 770, 770E, 770ED */
3027 TPACPI_Q_IBM('I', 'W', TPACPI_HK_Q_INIMASK), /* A20m */
3028 TPACPI_Q_IBM('I', 'V', TPACPI_HK_Q_INIMASK), /* A20p */
3029 TPACPI_Q_IBM('1', '0', TPACPI_HK_Q_INIMASK), /* A21e, A22e */
3030 TPACPI_Q_IBM('K', 'U', TPACPI_HK_Q_INIMASK), /* A21e */
3031 TPACPI_Q_IBM('K', 'X', TPACPI_HK_Q_INIMASK), /* A21m, A22m */
3032 TPACPI_Q_IBM('K', 'Y', TPACPI_HK_Q_INIMASK), /* A21p, A22p */
3033 TPACPI_Q_IBM('1', 'B', TPACPI_HK_Q_INIMASK), /* A22e */
3034 TPACPI_Q_IBM('1', '3', TPACPI_HK_Q_INIMASK), /* A22m */
3035 TPACPI_Q_IBM('1', 'E', TPACPI_HK_Q_INIMASK), /* A30/p (0) */
3036 TPACPI_Q_IBM('1', 'C', TPACPI_HK_Q_INIMASK), /* R30 */
3037 TPACPI_Q_IBM('1', 'F', TPACPI_HK_Q_INIMASK), /* R31 */
3038 TPACPI_Q_IBM('I', 'Y', TPACPI_HK_Q_INIMASK), /* T20 */
3039 TPACPI_Q_IBM('K', 'Z', TPACPI_HK_Q_INIMASK), /* T21 */
3040 TPACPI_Q_IBM('1', '6', TPACPI_HK_Q_INIMASK), /* T22 */
3041 TPACPI_Q_IBM('I', 'Z', TPACPI_HK_Q_INIMASK), /* X20, X21 */
3042 TPACPI_Q_IBM('1', 'D', TPACPI_HK_Q_INIMASK), /* X22, X23, X24 */
3043 };
3044
3045 typedef u16 tpacpi_keymap_entry_t;
3046 typedef tpacpi_keymap_entry_t tpacpi_keymap_t[TPACPI_HOTKEY_MAP_LEN];
3047
3048 static int __init hotkey_init(struct ibm_init_struct *iibm)
3049 {
3050 /* Requirements for changing the default keymaps:
3051 *
3052 * 1. Many of the keys are mapped to KEY_RESERVED for very
3053 * good reasons. Do not change them unless you have deep
3054 * knowledge on the IBM and Lenovo ThinkPad firmware for
3055 * the various ThinkPad models. The driver behaves
3056 * differently for KEY_RESERVED: such keys have their
3057 * hot key mask *unset* in mask_recommended, and also
3058 * in the initial hot key mask programmed into the
3059 * firmware at driver load time, which means the firm-
3060 * ware may react very differently if you change them to
3061 * something else;
3062 *
3063 * 2. You must be subscribed to the linux-thinkpad and
3064 * ibm-acpi-devel mailing lists, and you should read the
3065 * list archives since 2007 if you want to change the
3066 * keymaps. This requirement exists so that you will
3067 * know the past history of problems with the thinkpad-
3068 * acpi driver keymaps, and also that you will be
3069 * listening to any bug reports;
3070 *
3071 * 3. Do not send thinkpad-acpi specific patches directly to
3072 * for merging, *ever*. Send them to the linux-acpi
3073 * mailinglist for comments. Merging is to be done only
3074 * through acpi-test and the ACPI maintainer.
3075 *
3076 * If the above is too much to ask, don't change the keymap.
3077 * Ask the thinkpad-acpi maintainer to do it, instead.
3078 */
3079
3080 enum keymap_index {
3081 TPACPI_KEYMAP_IBM_GENERIC = 0,
3082 TPACPI_KEYMAP_LENOVO_GENERIC,
3083 };
3084
3085 static const tpacpi_keymap_t tpacpi_keymaps[] __initconst = {
3086 /* Generic keymap for IBM ThinkPads */
3087 [TPACPI_KEYMAP_IBM_GENERIC] = {
3088 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
3089 KEY_FN_F1, KEY_BATTERY, KEY_COFFEE, KEY_SLEEP,
3090 KEY_WLAN, KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
3091 KEY_FN_F9, KEY_FN_F10, KEY_FN_F11, KEY_SUSPEND,
3092
3093 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
3094 KEY_UNKNOWN, /* 0x0C: FN+BACKSPACE */
3095 KEY_UNKNOWN, /* 0x0D: FN+INSERT */
3096 KEY_UNKNOWN, /* 0x0E: FN+DELETE */
3097
3098 /* brightness: firmware always reacts to them */
3099 KEY_RESERVED, /* 0x0F: FN+HOME (brightness up) */
3100 KEY_RESERVED, /* 0x10: FN+END (brightness down) */
3101
3102 /* Thinklight: firmware always react to it */
3103 KEY_RESERVED, /* 0x11: FN+PGUP (thinklight toggle) */
3104
3105 KEY_UNKNOWN, /* 0x12: FN+PGDOWN */
3106 KEY_ZOOM, /* 0x13: FN+SPACE (zoom) */
3107
3108 /* Volume: firmware always react to it and reprograms
3109 * the built-in *extra* mixer. Never map it to control
3110 * another mixer by default. */
3111 KEY_RESERVED, /* 0x14: VOLUME UP */
3112 KEY_RESERVED, /* 0x15: VOLUME DOWN */
3113 KEY_RESERVED, /* 0x16: MUTE */
3114
3115 KEY_VENDOR, /* 0x17: Thinkpad/AccessIBM/Lenovo */
3116
3117 /* (assignments unknown, please report if found) */
3118 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3119 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3120 },
3121
3122 /* Generic keymap for Lenovo ThinkPads */
3123 [TPACPI_KEYMAP_LENOVO_GENERIC] = {
3124 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
3125 KEY_FN_F1, KEY_COFFEE, KEY_BATTERY, KEY_SLEEP,
3126 KEY_WLAN, KEY_CAMERA, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
3127 KEY_FN_F9, KEY_FN_F10, KEY_FN_F11, KEY_SUSPEND,
3128
3129 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
3130 KEY_UNKNOWN, /* 0x0C: FN+BACKSPACE */
3131 KEY_UNKNOWN, /* 0x0D: FN+INSERT */
3132 KEY_UNKNOWN, /* 0x0E: FN+DELETE */
3133
3134 /* These should be enabled --only-- when ACPI video
3135 * is disabled (i.e. in "vendor" mode), and are handled
3136 * in a special way by the init code */
3137 KEY_BRIGHTNESSUP, /* 0x0F: FN+HOME (brightness up) */
3138 KEY_BRIGHTNESSDOWN, /* 0x10: FN+END (brightness down) */
3139
3140 KEY_RESERVED, /* 0x11: FN+PGUP (thinklight toggle) */
3141
3142 KEY_UNKNOWN, /* 0x12: FN+PGDOWN */
3143 KEY_ZOOM, /* 0x13: FN+SPACE (zoom) */
3144
3145 /* Volume: z60/z61, T60 (BIOS version?): firmware always
3146 * react to it and reprograms the built-in *extra* mixer.
3147 * Never map it to control another mixer by default.
3148 *
3149 * T60?, T61, R60?, R61: firmware and EC tries to send
3150 * these over the regular keyboard, so these are no-ops,
3151 * but there are still weird bugs re. MUTE, so do not
3152 * change unless you get test reports from all Lenovo
3153 * models. May cause the BIOS to interfere with the
3154 * HDA mixer.
3155 */
3156 KEY_RESERVED, /* 0x14: VOLUME UP */
3157 KEY_RESERVED, /* 0x15: VOLUME DOWN */
3158 KEY_RESERVED, /* 0x16: MUTE */
3159
3160 KEY_VENDOR, /* 0x17: Thinkpad/AccessIBM/Lenovo */
3161
3162 /* (assignments unknown, please report if found) */
3163 KEY_UNKNOWN, KEY_UNKNOWN,
3164
3165 /*
3166 * The mic mute button only sends 0x1a. It does not
3167 * automatically mute the mic or change the mute light.
3168 */
3169 KEY_MICMUTE, /* 0x1a: Mic mute (since ?400 or so) */
3170
3171 /* (assignments unknown, please report if found) */
3172 KEY_UNKNOWN,
3173
3174 /* Extra keys in use since the X240 / T440 / T540 */
3175 KEY_CONFIG, KEY_SEARCH, KEY_SCALE, KEY_FILE,
3176 },
3177 };
3178
3179 static const struct tpacpi_quirk tpacpi_keymap_qtable[] __initconst = {
3180 /* Generic maps (fallback) */
3181 {
3182 .vendor = PCI_VENDOR_ID_IBM,
3183 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY,
3184 .quirks = TPACPI_KEYMAP_IBM_GENERIC,
3185 },
3186 {
3187 .vendor = PCI_VENDOR_ID_LENOVO,
3188 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY,
3189 .quirks = TPACPI_KEYMAP_LENOVO_GENERIC,
3190 },
3191 };
3192
3193 #define TPACPI_HOTKEY_MAP_SIZE sizeof(tpacpi_keymap_t)
3194 #define TPACPI_HOTKEY_MAP_TYPESIZE sizeof(tpacpi_keymap_entry_t)
3195
3196 int res, i;
3197 int status;
3198 int hkeyv;
3199 bool radiosw_state = false;
3200 bool tabletsw_state = false;
3201
3202 unsigned long quirks;
3203 unsigned long keymap_id;
3204
3205 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3206 "initializing hotkey subdriver\n");
3207
3208 BUG_ON(!tpacpi_inputdev);
3209 BUG_ON(tpacpi_inputdev->open != NULL ||
3210 tpacpi_inputdev->close != NULL);
3211
3212 TPACPI_ACPIHANDLE_INIT(hkey);
3213 mutex_init(&hotkey_mutex);
3214
3215 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
3216 mutex_init(&hotkey_thread_data_mutex);
3217 #endif
3218
3219 /* hotkey not supported on 570 */
3220 tp_features.hotkey = hkey_handle != NULL;
3221
3222 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3223 "hotkeys are %s\n",
3224 str_supported(tp_features.hotkey));
3225
3226 if (!tp_features.hotkey)
3227 return 1;
3228
3229 quirks = tpacpi_check_quirks(tpacpi_hotkey_qtable,
3230 ARRAY_SIZE(tpacpi_hotkey_qtable));
3231
3232 tpacpi_disable_brightness_delay();
3233
3234 /* MUST have enough space for all attributes to be added to
3235 * hotkey_dev_attributes */
3236 hotkey_dev_attributes = create_attr_set(
3237 ARRAY_SIZE(hotkey_attributes) + 2,
3238 NULL);
3239 if (!hotkey_dev_attributes)
3240 return -ENOMEM;
3241 res = add_many_to_attr_set(hotkey_dev_attributes,
3242 hotkey_attributes,
3243 ARRAY_SIZE(hotkey_attributes));
3244 if (res)
3245 goto err_exit;
3246
3247 /* mask not supported on 600e/x, 770e, 770x, A21e, A2xm/p,
3248 A30, R30, R31, T20-22, X20-21, X22-24. Detected by checking
3249 for HKEY interface version 0x100 */
3250 if (acpi_evalf(hkey_handle, &hkeyv, "MHKV", "qd")) {
3251 if ((hkeyv >> 8) != 1) {
3252 pr_err("unknown version of the HKEY interface: 0x%x\n",
3253 hkeyv);
3254 pr_err("please report this to %s\n", TPACPI_MAIL);
3255 } else {
3256 /*
3257 * MHKV 0x100 in A31, R40, R40e,
3258 * T4x, X31, and later
3259 */
3260 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3261 "firmware HKEY interface version: 0x%x\n",
3262 hkeyv);
3263
3264 /* Paranoia check AND init hotkey_all_mask */
3265 if (!acpi_evalf(hkey_handle, &hotkey_all_mask,
3266 "MHKA", "qd")) {
3267 pr_err("missing MHKA handler, "
3268 "please report this to %s\n",
3269 TPACPI_MAIL);
3270 /* Fallback: pre-init for FN+F3,F4,F12 */
3271 hotkey_all_mask = 0x080cU;
3272 } else {
3273 tp_features.hotkey_mask = 1;
3274 }
3275 }
3276 }
3277
3278 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3279 "hotkey masks are %s\n",
3280 str_supported(tp_features.hotkey_mask));
3281
3282 /* Init hotkey_all_mask if not initialized yet */
3283 if (!tp_features.hotkey_mask && !hotkey_all_mask &&
3284 (quirks & TPACPI_HK_Q_INIMASK))
3285 hotkey_all_mask = 0x080cU; /* FN+F12, FN+F4, FN+F3 */
3286
3287 /* Init hotkey_acpi_mask and hotkey_orig_mask */
3288 if (tp_features.hotkey_mask) {
3289 /* hotkey_source_mask *must* be zero for
3290 * the first hotkey_mask_get to return hotkey_orig_mask */
3291 res = hotkey_mask_get();
3292 if (res)
3293 goto err_exit;
3294
3295 hotkey_orig_mask = hotkey_acpi_mask;
3296 } else {
3297 hotkey_orig_mask = hotkey_all_mask;
3298 hotkey_acpi_mask = hotkey_all_mask;
3299 }
3300
3301 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3302 if (dbg_wlswemul) {
3303 tp_features.hotkey_wlsw = 1;
3304 radiosw_state = !!tpacpi_wlsw_emulstate;
3305 pr_info("radio switch emulation enabled\n");
3306 } else
3307 #endif
3308 /* Not all thinkpads have a hardware radio switch */
3309 if (acpi_evalf(hkey_handle, &status, "WLSW", "qd")) {
3310 tp_features.hotkey_wlsw = 1;
3311 radiosw_state = !!status;
3312 pr_info("radio switch found; radios are %s\n",
3313 enabled(status, 0));
3314 }
3315 if (tp_features.hotkey_wlsw)
3316 res = add_to_attr_set(hotkey_dev_attributes,
3317 &dev_attr_hotkey_radio_sw.attr);
3318
3319 /* For X41t, X60t, X61t Tablets... */
3320 if (!res && acpi_evalf(hkey_handle, &status, "MHKG", "qd")) {
3321 tp_features.hotkey_tablet = 1;
3322 tabletsw_state = !!(status & TP_HOTKEY_TABLET_MASK);
3323 pr_info("possible tablet mode switch found; "
3324 "ThinkPad in %s mode\n",
3325 (tabletsw_state) ? "tablet" : "laptop");
3326 res = add_to_attr_set(hotkey_dev_attributes,
3327 &dev_attr_hotkey_tablet_mode.attr);
3328 }
3329
3330 if (!res)
3331 res = register_attr_set_with_sysfs(
3332 hotkey_dev_attributes,
3333 &tpacpi_pdev->dev.kobj);
3334 if (res)
3335 goto err_exit;
3336
3337 /* Set up key map */
3338 hotkey_keycode_map = kmalloc(TPACPI_HOTKEY_MAP_SIZE,
3339 GFP_KERNEL);
3340 if (!hotkey_keycode_map) {
3341 pr_err("failed to allocate memory for key map\n");
3342 res = -ENOMEM;
3343 goto err_exit;
3344 }
3345
3346 keymap_id = tpacpi_check_quirks(tpacpi_keymap_qtable,
3347 ARRAY_SIZE(tpacpi_keymap_qtable));
3348 BUG_ON(keymap_id >= ARRAY_SIZE(tpacpi_keymaps));
3349 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3350 "using keymap number %lu\n", keymap_id);
3351
3352 memcpy(hotkey_keycode_map, &tpacpi_keymaps[keymap_id],
3353 TPACPI_HOTKEY_MAP_SIZE);
3354
3355 input_set_capability(tpacpi_inputdev, EV_MSC, MSC_SCAN);
3356 tpacpi_inputdev->keycodesize = TPACPI_HOTKEY_MAP_TYPESIZE;
3357 tpacpi_inputdev->keycodemax = TPACPI_HOTKEY_MAP_LEN;
3358 tpacpi_inputdev->keycode = hotkey_keycode_map;
3359 for (i = 0; i < TPACPI_HOTKEY_MAP_LEN; i++) {
3360 if (hotkey_keycode_map[i] != KEY_RESERVED) {
3361 input_set_capability(tpacpi_inputdev, EV_KEY,
3362 hotkey_keycode_map[i]);
3363 } else {
3364 if (i < sizeof(hotkey_reserved_mask)*8)
3365 hotkey_reserved_mask |= 1 << i;
3366 }
3367 }
3368
3369 if (tp_features.hotkey_wlsw) {
3370 input_set_capability(tpacpi_inputdev, EV_SW, SW_RFKILL_ALL);
3371 input_report_switch(tpacpi_inputdev,
3372 SW_RFKILL_ALL, radiosw_state);
3373 }
3374 if (tp_features.hotkey_tablet) {
3375 input_set_capability(tpacpi_inputdev, EV_SW, SW_TABLET_MODE);
3376 input_report_switch(tpacpi_inputdev,
3377 SW_TABLET_MODE, tabletsw_state);
3378 }
3379
3380 /* Do not issue duplicate brightness change events to
3381 * userspace. tpacpi_detect_brightness_capabilities() must have
3382 * been called before this point */
3383 if (acpi_video_backlight_support()) {
3384 pr_info("This ThinkPad has standard ACPI backlight "
3385 "brightness control, supported by the ACPI "
3386 "video driver\n");
3387 pr_notice("Disabling thinkpad-acpi brightness events "
3388 "by default...\n");
3389
3390 /* Disable brightness up/down on Lenovo thinkpads when
3391 * ACPI is handling them, otherwise it is plain impossible
3392 * for userspace to do something even remotely sane */
3393 hotkey_reserved_mask |=
3394 (1 << TP_ACPI_HOTKEYSCAN_FNHOME)
3395 | (1 << TP_ACPI_HOTKEYSCAN_FNEND);
3396 hotkey_unmap(TP_ACPI_HOTKEYSCAN_FNHOME);
3397 hotkey_unmap(TP_ACPI_HOTKEYSCAN_FNEND);
3398 }
3399
3400 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
3401 hotkey_source_mask = TPACPI_HKEY_NVRAM_GOOD_MASK
3402 & ~hotkey_all_mask
3403 & ~hotkey_reserved_mask;
3404
3405 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3406 "hotkey source mask 0x%08x, polling freq %u\n",
3407 hotkey_source_mask, hotkey_poll_freq);
3408 #endif
3409
3410 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3411 "enabling firmware HKEY event interface...\n");
3412 res = hotkey_status_set(true);
3413 if (res) {
3414 hotkey_exit();
3415 return res;
3416 }
3417 res = hotkey_mask_set(((hotkey_all_mask & ~hotkey_reserved_mask)
3418 | hotkey_driver_mask)
3419 & ~hotkey_source_mask);
3420 if (res < 0 && res != -ENXIO) {
3421 hotkey_exit();
3422 return res;
3423 }
3424 hotkey_user_mask = (hotkey_acpi_mask | hotkey_source_mask)
3425 & ~hotkey_reserved_mask;
3426 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3427 "initial masks: user=0x%08x, fw=0x%08x, poll=0x%08x\n",
3428 hotkey_user_mask, hotkey_acpi_mask, hotkey_source_mask);
3429
3430 tpacpi_inputdev->open = &hotkey_inputdev_open;
3431 tpacpi_inputdev->close = &hotkey_inputdev_close;
3432
3433 hotkey_poll_setup_safe(true);
3434
3435 return 0;
3436
3437 err_exit:
3438 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
3439 hotkey_dev_attributes = NULL;
3440
3441 return (res < 0) ? res : 1;
3442 }
3443
3444 /* Thinkpad X1 Carbon support 5 modes including Home mode, Web browser
3445 * mode, Web conference mode, Function mode and Lay-flat mode.
3446 * We support Home mode and Function mode currently.
3447 *
3448 * Will consider support rest of modes in future.
3449 *
3450 */
3451 enum ADAPTIVE_KEY_MODE {
3452 HOME_MODE,
3453 WEB_BROWSER_MODE,
3454 WEB_CONFERENCE_MODE,
3455 FUNCTION_MODE,
3456 LAYFLAT_MODE
3457 };
3458
3459 const int adaptive_keyboard_modes[] = {
3460 HOME_MODE,
3461 /* WEB_BROWSER_MODE = 2,
3462 WEB_CONFERENCE_MODE = 3, */
3463 FUNCTION_MODE
3464 };
3465
3466 #define DFR_CHANGE_ROW 0x101
3467 #define DFR_SHOW_QUICKVIEW_ROW 0x102
3468
3469 /* press Fn key a while second, it will switch to Function Mode. Then
3470 * release Fn key, previous mode be restored.
3471 */
3472 static bool adaptive_keyboard_mode_is_saved;
3473 static int adaptive_keyboard_prev_mode;
3474
3475 static int adaptive_keyboard_get_next_mode(int mode)
3476 {
3477 size_t i;
3478 size_t max_mode = ARRAY_SIZE(adaptive_keyboard_modes) - 1;
3479
3480 for (i = 0; i <= max_mode; i++) {
3481 if (adaptive_keyboard_modes[i] == mode)
3482 break;
3483 }
3484
3485 if (i >= max_mode)
3486 i = 0;
3487 else
3488 i++;
3489
3490 return adaptive_keyboard_modes[i];
3491 }
3492
3493 static bool adaptive_keyboard_hotkey_notify_hotkey(unsigned int scancode)
3494 {
3495 u32 current_mode = 0;
3496 int new_mode = 0;
3497
3498 switch (scancode) {
3499 case DFR_CHANGE_ROW:
3500 if (adaptive_keyboard_mode_is_saved) {
3501 new_mode = adaptive_keyboard_prev_mode;
3502 adaptive_keyboard_mode_is_saved = false;
3503 } else {
3504 if (!acpi_evalf(
3505 hkey_handle, &current_mode,
3506 "GTRW", "dd", 0)) {
3507 pr_err("Cannot read adaptive keyboard mode\n");
3508 return false;
3509 } else {
3510 new_mode = adaptive_keyboard_get_next_mode(
3511 current_mode);
3512 }
3513 }
3514
3515 if (!acpi_evalf(hkey_handle, NULL, "STRW", "vd", new_mode)) {
3516 pr_err("Cannot set adaptive keyboard mode\n");
3517 return false;
3518 }
3519
3520 return true;
3521
3522 case DFR_SHOW_QUICKVIEW_ROW:
3523 if (!acpi_evalf(hkey_handle,
3524 &adaptive_keyboard_prev_mode,
3525 "GTRW", "dd", 0)) {
3526 pr_err("Cannot read adaptive keyboard mode\n");
3527 return false;
3528 } else {
3529 adaptive_keyboard_mode_is_saved = true;
3530
3531 if (!acpi_evalf(hkey_handle,
3532 NULL, "STRW", "vd", FUNCTION_MODE)) {
3533 pr_err("Cannot set adaptive keyboard mode\n");
3534 return false;
3535 }
3536 }
3537 return true;
3538
3539 default:
3540 return false;
3541 }
3542 }
3543
3544 static bool hotkey_notify_hotkey(const u32 hkey,
3545 bool *send_acpi_ev,
3546 bool *ignore_acpi_ev)
3547 {
3548 /* 0x1000-0x1FFF: key presses */
3549 unsigned int scancode = hkey & 0xfff;
3550 *send_acpi_ev = true;
3551 *ignore_acpi_ev = false;
3552
3553 /* HKEY event 0x1001 is scancode 0x00 */
3554 if (scancode > 0 && scancode <= TPACPI_HOTKEY_MAP_LEN) {
3555 scancode--;
3556 if (!(hotkey_source_mask & (1 << scancode))) {
3557 tpacpi_input_send_key_masked(scancode);
3558 *send_acpi_ev = false;
3559 } else {
3560 *ignore_acpi_ev = true;
3561 }
3562 return true;
3563 } else {
3564 return adaptive_keyboard_hotkey_notify_hotkey(scancode);
3565 }
3566 return false;
3567 }
3568
3569 static bool hotkey_notify_wakeup(const u32 hkey,
3570 bool *send_acpi_ev,
3571 bool *ignore_acpi_ev)
3572 {
3573 /* 0x2000-0x2FFF: Wakeup reason */
3574 *send_acpi_ev = true;
3575 *ignore_acpi_ev = false;
3576
3577 switch (hkey) {
3578 case TP_HKEY_EV_WKUP_S3_UNDOCK: /* suspend, undock */
3579 case TP_HKEY_EV_WKUP_S4_UNDOCK: /* hibernation, undock */
3580 hotkey_wakeup_reason = TP_ACPI_WAKEUP_UNDOCK;
3581 *ignore_acpi_ev = true;
3582 break;
3583
3584 case TP_HKEY_EV_WKUP_S3_BAYEJ: /* suspend, bay eject */
3585 case TP_HKEY_EV_WKUP_S4_BAYEJ: /* hibernation, bay eject */
3586 hotkey_wakeup_reason = TP_ACPI_WAKEUP_BAYEJ;
3587 *ignore_acpi_ev = true;
3588 break;
3589
3590 case TP_HKEY_EV_WKUP_S3_BATLOW: /* Battery on critical low level/S3 */
3591 case TP_HKEY_EV_WKUP_S4_BATLOW: /* Battery on critical low level/S4 */
3592 pr_alert("EMERGENCY WAKEUP: battery almost empty\n");
3593 /* how to auto-heal: */
3594 /* 2313: woke up from S3, go to S4/S5 */
3595 /* 2413: woke up from S4, go to S5 */
3596 break;
3597
3598 default:
3599 return false;
3600 }
3601
3602 if (hotkey_wakeup_reason != TP_ACPI_WAKEUP_NONE) {
3603 pr_info("woke up due to a hot-unplug request...\n");
3604 hotkey_wakeup_reason_notify_change();
3605 }
3606 return true;
3607 }
3608
3609 static bool hotkey_notify_dockevent(const u32 hkey,
3610 bool *send_acpi_ev,
3611 bool *ignore_acpi_ev)
3612 {
3613 /* 0x4000-0x4FFF: dock-related events */
3614 *send_acpi_ev = true;
3615 *ignore_acpi_ev = false;
3616
3617 switch (hkey) {
3618 case TP_HKEY_EV_UNDOCK_ACK:
3619 /* ACPI undock operation completed after wakeup */
3620 hotkey_autosleep_ack = 1;
3621 pr_info("undocked\n");
3622 hotkey_wakeup_hotunplug_complete_notify_change();
3623 return true;
3624
3625 case TP_HKEY_EV_HOTPLUG_DOCK: /* docked to port replicator */
3626 pr_info("docked into hotplug port replicator\n");
3627 return true;
3628 case TP_HKEY_EV_HOTPLUG_UNDOCK: /* undocked from port replicator */
3629 pr_info("undocked from hotplug port replicator\n");
3630 return true;
3631
3632 default:
3633 return false;
3634 }
3635 }
3636
3637 static bool hotkey_notify_usrevent(const u32 hkey,
3638 bool *send_acpi_ev,
3639 bool *ignore_acpi_ev)
3640 {
3641 /* 0x5000-0x5FFF: human interface helpers */
3642 *send_acpi_ev = true;
3643 *ignore_acpi_ev = false;
3644
3645 switch (hkey) {
3646 case TP_HKEY_EV_PEN_INSERTED: /* X61t: tablet pen inserted into bay */
3647 case TP_HKEY_EV_PEN_REMOVED: /* X61t: tablet pen removed from bay */
3648 return true;
3649
3650 case TP_HKEY_EV_TABLET_TABLET: /* X41t-X61t: tablet mode */
3651 case TP_HKEY_EV_TABLET_NOTEBOOK: /* X41t-X61t: normal mode */
3652 tpacpi_input_send_tabletsw();
3653 hotkey_tablet_mode_notify_change();
3654 *send_acpi_ev = false;
3655 return true;
3656
3657 case TP_HKEY_EV_LID_CLOSE: /* Lid closed */
3658 case TP_HKEY_EV_LID_OPEN: /* Lid opened */
3659 case TP_HKEY_EV_BRGHT_CHANGED: /* brightness changed */
3660 /* do not propagate these events */
3661 *ignore_acpi_ev = true;
3662 return true;
3663
3664 default:
3665 return false;
3666 }
3667 }
3668
3669 static void thermal_dump_all_sensors(void);
3670
3671 static bool hotkey_notify_6xxx(const u32 hkey,
3672 bool *send_acpi_ev,
3673 bool *ignore_acpi_ev)
3674 {
3675 bool known = true;
3676
3677 /* 0x6000-0x6FFF: thermal alarms/notices and keyboard events */
3678 *send_acpi_ev = true;
3679 *ignore_acpi_ev = false;
3680
3681 switch (hkey) {
3682 case TP_HKEY_EV_THM_TABLE_CHANGED:
3683 pr_info("EC reports that Thermal Table has changed\n");
3684 /* recommended action: do nothing, we don't have
3685 * Lenovo ATM information */
3686 return true;
3687 case TP_HKEY_EV_ALARM_BAT_HOT:
3688 pr_crit("THERMAL ALARM: battery is too hot!\n");
3689 /* recommended action: warn user through gui */
3690 break;
3691 case TP_HKEY_EV_ALARM_BAT_XHOT:
3692 pr_alert("THERMAL EMERGENCY: battery is extremely hot!\n");
3693 /* recommended action: immediate sleep/hibernate */
3694 break;
3695 case TP_HKEY_EV_ALARM_SENSOR_HOT:
3696 pr_crit("THERMAL ALARM: "
3697 "a sensor reports something is too hot!\n");
3698 /* recommended action: warn user through gui, that */
3699 /* some internal component is too hot */
3700 break;
3701 case TP_HKEY_EV_ALARM_SENSOR_XHOT:
3702 pr_alert("THERMAL EMERGENCY: "
3703 "a sensor reports something is extremely hot!\n");
3704 /* recommended action: immediate sleep/hibernate */
3705 break;
3706 case TP_HKEY_EV_AC_CHANGED:
3707 /* X120e, X121e, X220, X220i, X220t, X230, T420, T420s, W520:
3708 * AC status changed; can be triggered by plugging or
3709 * unplugging AC adapter, docking or undocking. */
3710
3711 /* fallthrough */
3712
3713 case TP_HKEY_EV_KEY_NUMLOCK:
3714 case TP_HKEY_EV_KEY_FN:
3715 /* key press events, we just ignore them as long as the EC
3716 * is still reporting them in the normal keyboard stream */
3717 *send_acpi_ev = false;
3718 *ignore_acpi_ev = true;
3719 return true;
3720
3721 default:
3722 pr_warn("unknown possible thermal alarm or keyboard event received\n");
3723 known = false;
3724 }
3725
3726 thermal_dump_all_sensors();
3727
3728 return known;
3729 }
3730
3731 static void hotkey_notify(struct ibm_struct *ibm, u32 event)
3732 {
3733 u32 hkey;
3734 bool send_acpi_ev;
3735 bool ignore_acpi_ev;
3736 bool known_ev;
3737
3738 if (event != 0x80) {
3739 pr_err("unknown HKEY notification event %d\n", event);
3740 /* forward it to userspace, maybe it knows how to handle it */
3741 acpi_bus_generate_netlink_event(
3742 ibm->acpi->device->pnp.device_class,
3743 dev_name(&ibm->acpi->device->dev),
3744 event, 0);
3745 return;
3746 }
3747
3748 while (1) {
3749 if (!acpi_evalf(hkey_handle, &hkey, "MHKP", "d")) {
3750 pr_err("failed to retrieve HKEY event\n");
3751 return;
3752 }
3753
3754 if (hkey == 0) {
3755 /* queue empty */
3756 return;
3757 }
3758
3759 send_acpi_ev = true;
3760 ignore_acpi_ev = false;
3761
3762 switch (hkey >> 12) {
3763 case 1:
3764 /* 0x1000-0x1FFF: key presses */
3765 known_ev = hotkey_notify_hotkey(hkey, &send_acpi_ev,
3766 &ignore_acpi_ev);
3767 break;
3768 case 2:
3769 /* 0x2000-0x2FFF: Wakeup reason */
3770 known_ev = hotkey_notify_wakeup(hkey, &send_acpi_ev,
3771 &ignore_acpi_ev);
3772 break;
3773 case 3:
3774 /* 0x3000-0x3FFF: bay-related wakeups */
3775 switch (hkey) {
3776 case TP_HKEY_EV_BAYEJ_ACK:
3777 hotkey_autosleep_ack = 1;
3778 pr_info("bay ejected\n");
3779 hotkey_wakeup_hotunplug_complete_notify_change();
3780 known_ev = true;
3781 break;
3782 case TP_HKEY_EV_OPTDRV_EJ:
3783 /* FIXME: kick libata if SATA link offline */
3784 known_ev = true;
3785 break;
3786 default:
3787 known_ev = false;
3788 }
3789 break;
3790 case 4:
3791 /* 0x4000-0x4FFF: dock-related events */
3792 known_ev = hotkey_notify_dockevent(hkey, &send_acpi_ev,
3793 &ignore_acpi_ev);
3794 break;
3795 case 5:
3796 /* 0x5000-0x5FFF: human interface helpers */
3797 known_ev = hotkey_notify_usrevent(hkey, &send_acpi_ev,
3798 &ignore_acpi_ev);
3799 break;
3800 case 6:
3801 /* 0x6000-0x6FFF: thermal alarms/notices and
3802 * keyboard events */
3803 known_ev = hotkey_notify_6xxx(hkey, &send_acpi_ev,
3804 &ignore_acpi_ev);
3805 break;
3806 case 7:
3807 /* 0x7000-0x7FFF: misc */
3808 if (tp_features.hotkey_wlsw &&
3809 hkey == TP_HKEY_EV_RFKILL_CHANGED) {
3810 tpacpi_send_radiosw_update();
3811 send_acpi_ev = 0;
3812 known_ev = true;
3813 break;
3814 }
3815 /* fallthrough to default */
3816 default:
3817 known_ev = false;
3818 }
3819 if (!known_ev) {
3820 pr_notice("unhandled HKEY event 0x%04x\n", hkey);
3821 pr_notice("please report the conditions when this "
3822 "event happened to %s\n", TPACPI_MAIL);
3823 }
3824
3825 /* netlink events */
3826 if (!ignore_acpi_ev && send_acpi_ev) {
3827 acpi_bus_generate_netlink_event(
3828 ibm->acpi->device->pnp.device_class,
3829 dev_name(&ibm->acpi->device->dev),
3830 event, hkey);
3831 }
3832 }
3833 }
3834
3835 static void hotkey_suspend(void)
3836 {
3837 int hkeyv;
3838
3839 /* Do these on suspend, we get the events on early resume! */
3840 hotkey_wakeup_reason = TP_ACPI_WAKEUP_NONE;
3841 hotkey_autosleep_ack = 0;
3842
3843 /* save previous mode of adaptive keyboard of X1 Carbon */
3844 if (acpi_evalf(hkey_handle, &hkeyv, "MHKV", "qd")) {
3845 if ((hkeyv >> 8) == 2) {
3846 if (!acpi_evalf(hkey_handle,
3847 &adaptive_keyboard_prev_mode,
3848 "GTRW", "dd", 0)) {
3849 pr_err("Cannot read adaptive keyboard mode.\n");
3850 }
3851 }
3852 }
3853 }
3854
3855 static void hotkey_resume(void)
3856 {
3857 int hkeyv;
3858
3859 tpacpi_disable_brightness_delay();
3860
3861 if (hotkey_status_set(true) < 0 ||
3862 hotkey_mask_set(hotkey_acpi_mask) < 0)
3863 pr_err("error while attempting to reset the event "
3864 "firmware interface\n");
3865
3866 tpacpi_send_radiosw_update();
3867 hotkey_tablet_mode_notify_change();
3868 hotkey_wakeup_reason_notify_change();
3869 hotkey_wakeup_hotunplug_complete_notify_change();
3870 hotkey_poll_setup_safe(false);
3871
3872 /* restore previous mode of adapive keyboard of X1 Carbon */
3873 if (acpi_evalf(hkey_handle, &hkeyv, "MHKV", "qd")) {
3874 if ((hkeyv >> 8) == 2) {
3875 if (!acpi_evalf(hkey_handle,
3876 NULL,
3877 "STRW", "vd",
3878 adaptive_keyboard_prev_mode)) {
3879 pr_err("Cannot set adaptive keyboard mode.\n");
3880 }
3881 }
3882 }
3883 }
3884
3885 /* procfs -------------------------------------------------------------- */
3886 static int hotkey_read(struct seq_file *m)
3887 {
3888 int res, status;
3889
3890 if (!tp_features.hotkey) {
3891 seq_printf(m, "status:\t\tnot supported\n");
3892 return 0;
3893 }
3894
3895 if (mutex_lock_killable(&hotkey_mutex))
3896 return -ERESTARTSYS;
3897 res = hotkey_status_get(&status);
3898 if (!res)
3899 res = hotkey_mask_get();
3900 mutex_unlock(&hotkey_mutex);
3901 if (res)
3902 return res;
3903
3904 seq_printf(m, "status:\t\t%s\n", enabled(status, 0));
3905 if (hotkey_all_mask) {
3906 seq_printf(m, "mask:\t\t0x%08x\n", hotkey_user_mask);
3907 seq_printf(m, "commands:\tenable, disable, reset, <mask>\n");
3908 } else {
3909 seq_printf(m, "mask:\t\tnot supported\n");
3910 seq_printf(m, "commands:\tenable, disable, reset\n");
3911 }
3912
3913 return 0;
3914 }
3915
3916 static void hotkey_enabledisable_warn(bool enable)
3917 {
3918 tpacpi_log_usertask("procfs hotkey enable/disable");
3919 if (!WARN((tpacpi_lifecycle == TPACPI_LIFE_RUNNING || !enable),
3920 pr_fmt("hotkey enable/disable functionality has been "
3921 "removed from the driver. "
3922 "Hotkeys are always enabled.\n")))
3923 pr_err("Please remove the hotkey=enable module "
3924 "parameter, it is deprecated. "
3925 "Hotkeys are always enabled.\n");
3926 }
3927
3928 static int hotkey_write(char *buf)
3929 {
3930 int res;
3931 u32 mask;
3932 char *cmd;
3933
3934 if (!tp_features.hotkey)
3935 return -ENODEV;
3936
3937 if (mutex_lock_killable(&hotkey_mutex))
3938 return -ERESTARTSYS;
3939
3940 mask = hotkey_user_mask;
3941
3942 res = 0;
3943 while ((cmd = next_cmd(&buf))) {
3944 if (strlencmp(cmd, "enable") == 0) {
3945 hotkey_enabledisable_warn(1);
3946 } else if (strlencmp(cmd, "disable") == 0) {
3947 hotkey_enabledisable_warn(0);
3948 res = -EPERM;
3949 } else if (strlencmp(cmd, "reset") == 0) {
3950 mask = (hotkey_all_mask | hotkey_source_mask)
3951 & ~hotkey_reserved_mask;
3952 } else if (sscanf(cmd, "0x%x", &mask) == 1) {
3953 /* mask set */
3954 } else if (sscanf(cmd, "%x", &mask) == 1) {
3955 /* mask set */
3956 } else {
3957 res = -EINVAL;
3958 goto errexit;
3959 }
3960 }
3961
3962 if (!res) {
3963 tpacpi_disclose_usertask("procfs hotkey",
3964 "set mask to 0x%08x\n", mask);
3965 res = hotkey_user_mask_set(mask);
3966 }
3967
3968 errexit:
3969 mutex_unlock(&hotkey_mutex);
3970 return res;
3971 }
3972
3973 static const struct acpi_device_id ibm_htk_device_ids[] = {
3974 {TPACPI_ACPI_IBM_HKEY_HID, 0},
3975 {TPACPI_ACPI_LENOVO_HKEY_HID, 0},
3976 {"", 0},
3977 };
3978
3979 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver = {
3980 .hid = ibm_htk_device_ids,
3981 .notify = hotkey_notify,
3982 .handle = &hkey_handle,
3983 .type = ACPI_DEVICE_NOTIFY,
3984 };
3985
3986 static struct ibm_struct hotkey_driver_data = {
3987 .name = "hotkey",
3988 .read = hotkey_read,
3989 .write = hotkey_write,
3990 .exit = hotkey_exit,
3991 .resume = hotkey_resume,
3992 .suspend = hotkey_suspend,
3993 .acpi = &ibm_hotkey_acpidriver,
3994 };
3995
3996 /*************************************************************************
3997 * Bluetooth subdriver
3998 */
3999
4000 enum {
4001 /* ACPI GBDC/SBDC bits */
4002 TP_ACPI_BLUETOOTH_HWPRESENT = 0x01, /* Bluetooth hw available */
4003 TP_ACPI_BLUETOOTH_RADIOSSW = 0x02, /* Bluetooth radio enabled */
4004 TP_ACPI_BLUETOOTH_RESUMECTRL = 0x04, /* Bluetooth state at resume:
4005 0 = disable, 1 = enable */
4006 };
4007
4008 enum {
4009 /* ACPI \BLTH commands */
4010 TP_ACPI_BLTH_GET_ULTRAPORT_ID = 0x00, /* Get Ultraport BT ID */
4011 TP_ACPI_BLTH_GET_PWR_ON_RESUME = 0x01, /* Get power-on-resume state */
4012 TP_ACPI_BLTH_PWR_ON_ON_RESUME = 0x02, /* Resume powered on */
4013 TP_ACPI_BLTH_PWR_OFF_ON_RESUME = 0x03, /* Resume powered off */
4014 TP_ACPI_BLTH_SAVE_STATE = 0x05, /* Save state for S4/S5 */
4015 };
4016
4017 #define TPACPI_RFK_BLUETOOTH_SW_NAME "tpacpi_bluetooth_sw"
4018
4019 static int bluetooth_get_status(void)
4020 {
4021 int status;
4022
4023 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4024 if (dbg_bluetoothemul)
4025 return (tpacpi_bluetooth_emulstate) ?
4026 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4027 #endif
4028
4029 if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
4030 return -EIO;
4031
4032 return ((status & TP_ACPI_BLUETOOTH_RADIOSSW) != 0) ?
4033 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4034 }
4035
4036 static int bluetooth_set_status(enum tpacpi_rfkill_state state)
4037 {
4038 int status;
4039
4040 vdbg_printk(TPACPI_DBG_RFKILL,
4041 "will attempt to %s bluetooth\n",
4042 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable");
4043
4044 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4045 if (dbg_bluetoothemul) {
4046 tpacpi_bluetooth_emulstate = (state == TPACPI_RFK_RADIO_ON);
4047 return 0;
4048 }
4049 #endif
4050
4051 if (state == TPACPI_RFK_RADIO_ON)
4052 status = TP_ACPI_BLUETOOTH_RADIOSSW
4053 | TP_ACPI_BLUETOOTH_RESUMECTRL;
4054 else
4055 status = 0;
4056
4057 if (!acpi_evalf(hkey_handle, NULL, "SBDC", "vd", status))
4058 return -EIO;
4059
4060 return 0;
4061 }
4062
4063 /* sysfs bluetooth enable ---------------------------------------------- */
4064 static ssize_t bluetooth_enable_show(struct device *dev,
4065 struct device_attribute *attr,
4066 char *buf)
4067 {
4068 return tpacpi_rfk_sysfs_enable_show(TPACPI_RFK_BLUETOOTH_SW_ID,
4069 attr, buf);
4070 }
4071
4072 static ssize_t bluetooth_enable_store(struct device *dev,
4073 struct device_attribute *attr,
4074 const char *buf, size_t count)
4075 {
4076 return tpacpi_rfk_sysfs_enable_store(TPACPI_RFK_BLUETOOTH_SW_ID,
4077 attr, buf, count);
4078 }
4079
4080 static struct device_attribute dev_attr_bluetooth_enable =
4081 __ATTR(bluetooth_enable, S_IWUSR | S_IRUGO,
4082 bluetooth_enable_show, bluetooth_enable_store);
4083
4084 /* --------------------------------------------------------------------- */
4085
4086 static struct attribute *bluetooth_attributes[] = {
4087 &dev_attr_bluetooth_enable.attr,
4088 NULL
4089 };
4090
4091 static const struct attribute_group bluetooth_attr_group = {
4092 .attrs = bluetooth_attributes,
4093 };
4094
4095 static const struct tpacpi_rfk_ops bluetooth_tprfk_ops = {
4096 .get_status = bluetooth_get_status,
4097 .set_status = bluetooth_set_status,
4098 };
4099
4100 static void bluetooth_shutdown(void)
4101 {
4102 /* Order firmware to save current state to NVRAM */
4103 if (!acpi_evalf(NULL, NULL, "\\BLTH", "vd",
4104 TP_ACPI_BLTH_SAVE_STATE))
4105 pr_notice("failed to save bluetooth state to NVRAM\n");
4106 else
4107 vdbg_printk(TPACPI_DBG_RFKILL,
4108 "bluetooth state saved to NVRAM\n");
4109 }
4110
4111 static void bluetooth_exit(void)
4112 {
4113 sysfs_remove_group(&tpacpi_pdev->dev.kobj,
4114 &bluetooth_attr_group);
4115
4116 tpacpi_destroy_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID);
4117
4118 bluetooth_shutdown();
4119 }
4120
4121 static int __init bluetooth_init(struct ibm_init_struct *iibm)
4122 {
4123 int res;
4124 int status = 0;
4125
4126 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4127 "initializing bluetooth subdriver\n");
4128
4129 TPACPI_ACPIHANDLE_INIT(hkey);
4130
4131 /* bluetooth not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
4132 G4x, R30, R31, R40e, R50e, T20-22, X20-21 */
4133 tp_features.bluetooth = hkey_handle &&
4134 acpi_evalf(hkey_handle, &status, "GBDC", "qd");
4135
4136 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4137 "bluetooth is %s, status 0x%02x\n",
4138 str_supported(tp_features.bluetooth),
4139 status);
4140
4141 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4142 if (dbg_bluetoothemul) {
4143 tp_features.bluetooth = 1;
4144 pr_info("bluetooth switch emulation enabled\n");
4145 } else
4146 #endif
4147 if (tp_features.bluetooth &&
4148 !(status & TP_ACPI_BLUETOOTH_HWPRESENT)) {
4149 /* no bluetooth hardware present in system */
4150 tp_features.bluetooth = 0;
4151 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4152 "bluetooth hardware not installed\n");
4153 }
4154
4155 if (!tp_features.bluetooth)
4156 return 1;
4157
4158 res = tpacpi_new_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID,
4159 &bluetooth_tprfk_ops,
4160 RFKILL_TYPE_BLUETOOTH,
4161 TPACPI_RFK_BLUETOOTH_SW_NAME,
4162 true);
4163 if (res)
4164 return res;
4165
4166 res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
4167 &bluetooth_attr_group);
4168 if (res) {
4169 tpacpi_destroy_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID);
4170 return res;
4171 }
4172
4173 return 0;
4174 }
4175
4176 /* procfs -------------------------------------------------------------- */
4177 static int bluetooth_read(struct seq_file *m)
4178 {
4179 return tpacpi_rfk_procfs_read(TPACPI_RFK_BLUETOOTH_SW_ID, m);
4180 }
4181
4182 static int bluetooth_write(char *buf)
4183 {
4184 return tpacpi_rfk_procfs_write(TPACPI_RFK_BLUETOOTH_SW_ID, buf);
4185 }
4186
4187 static struct ibm_struct bluetooth_driver_data = {
4188 .name = "bluetooth",
4189 .read = bluetooth_read,
4190 .write = bluetooth_write,
4191 .exit = bluetooth_exit,
4192 .shutdown = bluetooth_shutdown,
4193 };
4194
4195 /*************************************************************************
4196 * Wan subdriver
4197 */
4198
4199 enum {
4200 /* ACPI GWAN/SWAN bits */
4201 TP_ACPI_WANCARD_HWPRESENT = 0x01, /* Wan hw available */
4202 TP_ACPI_WANCARD_RADIOSSW = 0x02, /* Wan radio enabled */
4203 TP_ACPI_WANCARD_RESUMECTRL = 0x04, /* Wan state at resume:
4204 0 = disable, 1 = enable */
4205 };
4206
4207 #define TPACPI_RFK_WWAN_SW_NAME "tpacpi_wwan_sw"
4208
4209 static int wan_get_status(void)
4210 {
4211 int status;
4212
4213 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4214 if (dbg_wwanemul)
4215 return (tpacpi_wwan_emulstate) ?
4216 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4217 #endif
4218
4219 if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
4220 return -EIO;
4221
4222 return ((status & TP_ACPI_WANCARD_RADIOSSW) != 0) ?
4223 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4224 }
4225
4226 static int wan_set_status(enum tpacpi_rfkill_state state)
4227 {
4228 int status;
4229
4230 vdbg_printk(TPACPI_DBG_RFKILL,
4231 "will attempt to %s wwan\n",
4232 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable");
4233
4234 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4235 if (dbg_wwanemul) {
4236 tpacpi_wwan_emulstate = (state == TPACPI_RFK_RADIO_ON);
4237 return 0;
4238 }
4239 #endif
4240
4241 if (state == TPACPI_RFK_RADIO_ON)
4242 status = TP_ACPI_WANCARD_RADIOSSW
4243 | TP_ACPI_WANCARD_RESUMECTRL;
4244 else
4245 status = 0;
4246
4247 if (!acpi_evalf(hkey_handle, NULL, "SWAN", "vd", status))
4248 return -EIO;
4249
4250 return 0;
4251 }
4252
4253 /* sysfs wan enable ---------------------------------------------------- */
4254 static ssize_t wan_enable_show(struct device *dev,
4255 struct device_attribute *attr,
4256 char *buf)
4257 {
4258 return tpacpi_rfk_sysfs_enable_show(TPACPI_RFK_WWAN_SW_ID,
4259 attr, buf);
4260 }
4261
4262 static ssize_t wan_enable_store(struct device *dev,
4263 struct device_attribute *attr,
4264 const char *buf, size_t count)
4265 {
4266 return tpacpi_rfk_sysfs_enable_store(TPACPI_RFK_WWAN_SW_ID,
4267 attr, buf, count);
4268 }
4269
4270 static struct device_attribute dev_attr_wan_enable =
4271 __ATTR(wwan_enable, S_IWUSR | S_IRUGO,
4272 wan_enable_show, wan_enable_store);
4273
4274 /* --------------------------------------------------------------------- */
4275
4276 static struct attribute *wan_attributes[] = {
4277 &dev_attr_wan_enable.attr,
4278 NULL
4279 };
4280
4281 static const struct attribute_group wan_attr_group = {
4282 .attrs = wan_attributes,
4283 };
4284
4285 static const struct tpacpi_rfk_ops wan_tprfk_ops = {
4286 .get_status = wan_get_status,
4287 .set_status = wan_set_status,
4288 };
4289
4290 static void wan_shutdown(void)
4291 {
4292 /* Order firmware to save current state to NVRAM */
4293 if (!acpi_evalf(NULL, NULL, "\\WGSV", "vd",
4294 TP_ACPI_WGSV_SAVE_STATE))
4295 pr_notice("failed to save WWAN state to NVRAM\n");
4296 else
4297 vdbg_printk(TPACPI_DBG_RFKILL,
4298 "WWAN state saved to NVRAM\n");
4299 }
4300
4301 static void wan_exit(void)
4302 {
4303 sysfs_remove_group(&tpacpi_pdev->dev.kobj,
4304 &wan_attr_group);
4305
4306 tpacpi_destroy_rfkill(TPACPI_RFK_WWAN_SW_ID);
4307
4308 wan_shutdown();
4309 }
4310
4311 static int __init wan_init(struct ibm_init_struct *iibm)
4312 {
4313 int res;
4314 int status = 0;
4315
4316 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4317 "initializing wan subdriver\n");
4318
4319 TPACPI_ACPIHANDLE_INIT(hkey);
4320
4321 tp_features.wan = hkey_handle &&
4322 acpi_evalf(hkey_handle, &status, "GWAN", "qd");
4323
4324 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4325 "wan is %s, status 0x%02x\n",
4326 str_supported(tp_features.wan),
4327 status);
4328
4329 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4330 if (dbg_wwanemul) {
4331 tp_features.wan = 1;
4332 pr_info("wwan switch emulation enabled\n");
4333 } else
4334 #endif
4335 if (tp_features.wan &&
4336 !(status & TP_ACPI_WANCARD_HWPRESENT)) {
4337 /* no wan hardware present in system */
4338 tp_features.wan = 0;
4339 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4340 "wan hardware not installed\n");
4341 }
4342
4343 if (!tp_features.wan)
4344 return 1;
4345
4346 res = tpacpi_new_rfkill(TPACPI_RFK_WWAN_SW_ID,
4347 &wan_tprfk_ops,
4348 RFKILL_TYPE_WWAN,
4349 TPACPI_RFK_WWAN_SW_NAME,
4350 true);
4351 if (res)
4352 return res;
4353
4354 res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
4355 &wan_attr_group);
4356
4357 if (res) {
4358 tpacpi_destroy_rfkill(TPACPI_RFK_WWAN_SW_ID);
4359 return res;
4360 }
4361
4362 return 0;
4363 }
4364
4365 /* procfs -------------------------------------------------------------- */
4366 static int wan_read(struct seq_file *m)
4367 {
4368 return tpacpi_rfk_procfs_read(TPACPI_RFK_WWAN_SW_ID, m);
4369 }
4370
4371 static int wan_write(char *buf)
4372 {
4373 return tpacpi_rfk_procfs_write(TPACPI_RFK_WWAN_SW_ID, buf);
4374 }
4375
4376 static struct ibm_struct wan_driver_data = {
4377 .name = "wan",
4378 .read = wan_read,
4379 .write = wan_write,
4380 .exit = wan_exit,
4381 .shutdown = wan_shutdown,
4382 };
4383
4384 /*************************************************************************
4385 * UWB subdriver
4386 */
4387
4388 enum {
4389 /* ACPI GUWB/SUWB bits */
4390 TP_ACPI_UWB_HWPRESENT = 0x01, /* UWB hw available */
4391 TP_ACPI_UWB_RADIOSSW = 0x02, /* UWB radio enabled */
4392 };
4393
4394 #define TPACPI_RFK_UWB_SW_NAME "tpacpi_uwb_sw"
4395
4396 static int uwb_get_status(void)
4397 {
4398 int status;
4399
4400 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4401 if (dbg_uwbemul)
4402 return (tpacpi_uwb_emulstate) ?
4403 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4404 #endif
4405
4406 if (!acpi_evalf(hkey_handle, &status, "GUWB", "d"))
4407 return -EIO;
4408
4409 return ((status & TP_ACPI_UWB_RADIOSSW) != 0) ?
4410 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4411 }
4412
4413 static int uwb_set_status(enum tpacpi_rfkill_state state)
4414 {
4415 int status;
4416
4417 vdbg_printk(TPACPI_DBG_RFKILL,
4418 "will attempt to %s UWB\n",
4419 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable");
4420
4421 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4422 if (dbg_uwbemul) {
4423 tpacpi_uwb_emulstate = (state == TPACPI_RFK_RADIO_ON);
4424 return 0;
4425 }
4426 #endif
4427
4428 if (state == TPACPI_RFK_RADIO_ON)
4429 status = TP_ACPI_UWB_RADIOSSW;
4430 else
4431 status = 0;
4432
4433 if (!acpi_evalf(hkey_handle, NULL, "SUWB", "vd", status))
4434 return -EIO;
4435
4436 return 0;
4437 }
4438
4439 /* --------------------------------------------------------------------- */
4440
4441 static const struct tpacpi_rfk_ops uwb_tprfk_ops = {
4442 .get_status = uwb_get_status,
4443 .set_status = uwb_set_status,
4444 };
4445
4446 static void uwb_exit(void)
4447 {
4448 tpacpi_destroy_rfkill(TPACPI_RFK_UWB_SW_ID);
4449 }
4450
4451 static int __init uwb_init(struct ibm_init_struct *iibm)
4452 {
4453 int res;
4454 int status = 0;
4455
4456 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4457 "initializing uwb subdriver\n");
4458
4459 TPACPI_ACPIHANDLE_INIT(hkey);
4460
4461 tp_features.uwb = hkey_handle &&
4462 acpi_evalf(hkey_handle, &status, "GUWB", "qd");
4463
4464 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4465 "uwb is %s, status 0x%02x\n",
4466 str_supported(tp_features.uwb),
4467 status);
4468
4469 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4470 if (dbg_uwbemul) {
4471 tp_features.uwb = 1;
4472 pr_info("uwb switch emulation enabled\n");
4473 } else
4474 #endif
4475 if (tp_features.uwb &&
4476 !(status & TP_ACPI_UWB_HWPRESENT)) {
4477 /* no uwb hardware present in system */
4478 tp_features.uwb = 0;
4479 dbg_printk(TPACPI_DBG_INIT,
4480 "uwb hardware not installed\n");
4481 }
4482
4483 if (!tp_features.uwb)
4484 return 1;
4485
4486 res = tpacpi_new_rfkill(TPACPI_RFK_UWB_SW_ID,
4487 &uwb_tprfk_ops,
4488 RFKILL_TYPE_UWB,
4489 TPACPI_RFK_UWB_SW_NAME,
4490 false);
4491 return res;
4492 }
4493
4494 static struct ibm_struct uwb_driver_data = {
4495 .name = "uwb",
4496 .exit = uwb_exit,
4497 .flags.experimental = 1,
4498 };
4499
4500 /*************************************************************************
4501 * Video subdriver
4502 */
4503
4504 #ifdef CONFIG_THINKPAD_ACPI_VIDEO
4505
4506 enum video_access_mode {
4507 TPACPI_VIDEO_NONE = 0,
4508 TPACPI_VIDEO_570, /* 570 */
4509 TPACPI_VIDEO_770, /* 600e/x, 770e, 770x */
4510 TPACPI_VIDEO_NEW, /* all others */
4511 };
4512
4513 enum { /* video status flags, based on VIDEO_570 */
4514 TP_ACPI_VIDEO_S_LCD = 0x01, /* LCD output enabled */
4515 TP_ACPI_VIDEO_S_CRT = 0x02, /* CRT output enabled */
4516 TP_ACPI_VIDEO_S_DVI = 0x08, /* DVI output enabled */
4517 };
4518
4519 enum { /* TPACPI_VIDEO_570 constants */
4520 TP_ACPI_VIDEO_570_PHSCMD = 0x87, /* unknown magic constant :( */
4521 TP_ACPI_VIDEO_570_PHSMASK = 0x03, /* PHS bits that map to
4522 * video_status_flags */
4523 TP_ACPI_VIDEO_570_PHS2CMD = 0x8b, /* unknown magic constant :( */
4524 TP_ACPI_VIDEO_570_PHS2SET = 0x80, /* unknown magic constant :( */
4525 };
4526
4527 static enum video_access_mode video_supported;
4528 static int video_orig_autosw;
4529
4530 static int video_autosw_get(void);
4531 static int video_autosw_set(int enable);
4532
4533 TPACPI_HANDLE(vid, root,
4534 "\\_SB.PCI.AGP.VGA", /* 570 */
4535 "\\_SB.PCI0.AGP0.VID0", /* 600e/x, 770x */
4536 "\\_SB.PCI0.VID0", /* 770e */
4537 "\\_SB.PCI0.VID", /* A21e, G4x, R50e, X30, X40 */
4538 "\\_SB.PCI0.AGP.VGA", /* X100e and a few others */
4539 "\\_SB.PCI0.AGP.VID", /* all others */
4540 ); /* R30, R31 */
4541
4542 TPACPI_HANDLE(vid2, root, "\\_SB.PCI0.AGPB.VID"); /* G41 */
4543
4544 static int __init video_init(struct ibm_init_struct *iibm)
4545 {
4546 int ivga;
4547
4548 vdbg_printk(TPACPI_DBG_INIT, "initializing video subdriver\n");
4549
4550 TPACPI_ACPIHANDLE_INIT(vid);
4551 if (tpacpi_is_ibm())
4552 TPACPI_ACPIHANDLE_INIT(vid2);
4553
4554 if (vid2_handle && acpi_evalf(NULL, &ivga, "\\IVGA", "d") && ivga)
4555 /* G41, assume IVGA doesn't change */
4556 vid_handle = vid2_handle;
4557
4558 if (!vid_handle)
4559 /* video switching not supported on R30, R31 */
4560 video_supported = TPACPI_VIDEO_NONE;
4561 else if (tpacpi_is_ibm() &&
4562 acpi_evalf(vid_handle, &video_orig_autosw, "SWIT", "qd"))
4563 /* 570 */
4564 video_supported = TPACPI_VIDEO_570;
4565 else if (tpacpi_is_ibm() &&
4566 acpi_evalf(vid_handle, &video_orig_autosw, "^VADL", "qd"))
4567 /* 600e/x, 770e, 770x */
4568 video_supported = TPACPI_VIDEO_770;
4569 else
4570 /* all others */
4571 video_supported = TPACPI_VIDEO_NEW;
4572
4573 vdbg_printk(TPACPI_DBG_INIT, "video is %s, mode %d\n",
4574 str_supported(video_supported != TPACPI_VIDEO_NONE),
4575 video_supported);
4576
4577 return (video_supported != TPACPI_VIDEO_NONE) ? 0 : 1;
4578 }
4579
4580 static void video_exit(void)
4581 {
4582 dbg_printk(TPACPI_DBG_EXIT,
4583 "restoring original video autoswitch mode\n");
4584 if (video_autosw_set(video_orig_autosw))
4585 pr_err("error while trying to restore original "
4586 "video autoswitch mode\n");
4587 }
4588
4589 static int video_outputsw_get(void)
4590 {
4591 int status = 0;
4592 int i;
4593
4594 switch (video_supported) {
4595 case TPACPI_VIDEO_570:
4596 if (!acpi_evalf(NULL, &i, "\\_SB.PHS", "dd",
4597 TP_ACPI_VIDEO_570_PHSCMD))
4598 return -EIO;
4599 status = i & TP_ACPI_VIDEO_570_PHSMASK;
4600 break;
4601 case TPACPI_VIDEO_770:
4602 if (!acpi_evalf(NULL, &i, "\\VCDL", "d"))
4603 return -EIO;
4604 if (i)
4605 status |= TP_ACPI_VIDEO_S_LCD;
4606 if (!acpi_evalf(NULL, &i, "\\VCDC", "d"))
4607 return -EIO;
4608 if (i)
4609 status |= TP_ACPI_VIDEO_S_CRT;
4610 break;
4611 case TPACPI_VIDEO_NEW:
4612 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 1) ||
4613 !acpi_evalf(NULL, &i, "\\VCDC", "d"))
4614 return -EIO;
4615 if (i)
4616 status |= TP_ACPI_VIDEO_S_CRT;
4617
4618 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0) ||
4619 !acpi_evalf(NULL, &i, "\\VCDL", "d"))
4620 return -EIO;
4621 if (i)
4622 status |= TP_ACPI_VIDEO_S_LCD;
4623 if (!acpi_evalf(NULL, &i, "\\VCDD", "d"))
4624 return -EIO;
4625 if (i)
4626 status |= TP_ACPI_VIDEO_S_DVI;
4627 break;
4628 default:
4629 return -ENOSYS;
4630 }
4631
4632 return status;
4633 }
4634
4635 static int video_outputsw_set(int status)
4636 {
4637 int autosw;
4638 int res = 0;
4639
4640 switch (video_supported) {
4641 case TPACPI_VIDEO_570:
4642 res = acpi_evalf(NULL, NULL,
4643 "\\_SB.PHS2", "vdd",
4644 TP_ACPI_VIDEO_570_PHS2CMD,
4645 status | TP_ACPI_VIDEO_570_PHS2SET);
4646 break;
4647 case TPACPI_VIDEO_770:
4648 autosw = video_autosw_get();
4649 if (autosw < 0)
4650 return autosw;
4651
4652 res = video_autosw_set(1);
4653 if (res)
4654 return res;
4655 res = acpi_evalf(vid_handle, NULL,
4656 "ASWT", "vdd", status * 0x100, 0);
4657 if (!autosw && video_autosw_set(autosw)) {
4658 pr_err("video auto-switch left enabled due to error\n");
4659 return -EIO;
4660 }
4661 break;
4662 case TPACPI_VIDEO_NEW:
4663 res = acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0x80) &&
4664 acpi_evalf(NULL, NULL, "\\VSDS", "vdd", status, 1);
4665 break;
4666 default:
4667 return -ENOSYS;
4668 }
4669
4670 return (res) ? 0 : -EIO;
4671 }
4672
4673 static int video_autosw_get(void)
4674 {
4675 int autosw = 0;
4676
4677 switch (video_supported) {
4678 case TPACPI_VIDEO_570:
4679 if (!acpi_evalf(vid_handle, &autosw, "SWIT", "d"))
4680 return -EIO;
4681 break;
4682 case TPACPI_VIDEO_770:
4683 case TPACPI_VIDEO_NEW:
4684 if (!acpi_evalf(vid_handle, &autosw, "^VDEE", "d"))
4685 return -EIO;
4686 break;
4687 default:
4688 return -ENOSYS;
4689 }
4690
4691 return autosw & 1;
4692 }
4693
4694 static int video_autosw_set(int enable)
4695 {
4696 if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", (enable) ? 1 : 0))
4697 return -EIO;
4698 return 0;
4699 }
4700
4701 static int video_outputsw_cycle(void)
4702 {
4703 int autosw = video_autosw_get();
4704 int res;
4705
4706 if (autosw < 0)
4707 return autosw;
4708
4709 switch (video_supported) {
4710 case TPACPI_VIDEO_570:
4711 res = video_autosw_set(1);
4712 if (res)
4713 return res;
4714 res = acpi_evalf(ec_handle, NULL, "_Q16", "v");
4715 break;
4716 case TPACPI_VIDEO_770:
4717 case TPACPI_VIDEO_NEW:
4718 res = video_autosw_set(1);
4719 if (res)
4720 return res;
4721 res = acpi_evalf(vid_handle, NULL, "VSWT", "v");
4722 break;
4723 default:
4724 return -ENOSYS;
4725 }
4726 if (!autosw && video_autosw_set(autosw)) {
4727 pr_err("video auto-switch left enabled due to error\n");
4728 return -EIO;
4729 }
4730
4731 return (res) ? 0 : -EIO;
4732 }
4733
4734 static int video_expand_toggle(void)
4735 {
4736 switch (video_supported) {
4737 case TPACPI_VIDEO_570:
4738 return acpi_evalf(ec_handle, NULL, "_Q17", "v") ?
4739 0 : -EIO;
4740 case TPACPI_VIDEO_770:
4741 return acpi_evalf(vid_handle, NULL, "VEXP", "v") ?
4742 0 : -EIO;
4743 case TPACPI_VIDEO_NEW:
4744 return acpi_evalf(NULL, NULL, "\\VEXP", "v") ?
4745 0 : -EIO;
4746 default:
4747 return -ENOSYS;
4748 }
4749 /* not reached */
4750 }
4751
4752 static int video_read(struct seq_file *m)
4753 {
4754 int status, autosw;
4755
4756 if (video_supported == TPACPI_VIDEO_NONE) {
4757 seq_printf(m, "status:\t\tnot supported\n");
4758 return 0;
4759 }
4760
4761 /* Even reads can crash X.org, so... */
4762 if (!capable(CAP_SYS_ADMIN))
4763 return -EPERM;
4764
4765 status = video_outputsw_get();
4766 if (status < 0)
4767 return status;
4768
4769 autosw = video_autosw_get();
4770 if (autosw < 0)
4771 return autosw;
4772
4773 seq_printf(m, "status:\t\tsupported\n");
4774 seq_printf(m, "lcd:\t\t%s\n", enabled(status, 0));
4775 seq_printf(m, "crt:\t\t%s\n", enabled(status, 1));
4776 if (video_supported == TPACPI_VIDEO_NEW)
4777 seq_printf(m, "dvi:\t\t%s\n", enabled(status, 3));
4778 seq_printf(m, "auto:\t\t%s\n", enabled(autosw, 0));
4779 seq_printf(m, "commands:\tlcd_enable, lcd_disable\n");
4780 seq_printf(m, "commands:\tcrt_enable, crt_disable\n");
4781 if (video_supported == TPACPI_VIDEO_NEW)
4782 seq_printf(m, "commands:\tdvi_enable, dvi_disable\n");
4783 seq_printf(m, "commands:\tauto_enable, auto_disable\n");
4784 seq_printf(m, "commands:\tvideo_switch, expand_toggle\n");
4785
4786 return 0;
4787 }
4788
4789 static int video_write(char *buf)
4790 {
4791 char *cmd;
4792 int enable, disable, status;
4793 int res;
4794
4795 if (video_supported == TPACPI_VIDEO_NONE)
4796 return -ENODEV;
4797
4798 /* Even reads can crash X.org, let alone writes... */
4799 if (!capable(CAP_SYS_ADMIN))
4800 return -EPERM;
4801
4802 enable = 0;
4803 disable = 0;
4804
4805 while ((cmd = next_cmd(&buf))) {
4806 if (strlencmp(cmd, "lcd_enable") == 0) {
4807 enable |= TP_ACPI_VIDEO_S_LCD;
4808 } else if (strlencmp(cmd, "lcd_disable") == 0) {
4809 disable |= TP_ACPI_VIDEO_S_LCD;
4810 } else if (strlencmp(cmd, "crt_enable") == 0) {
4811 enable |= TP_ACPI_VIDEO_S_CRT;
4812 } else if (strlencmp(cmd, "crt_disable") == 0) {
4813 disable |= TP_ACPI_VIDEO_S_CRT;
4814 } else if (video_supported == TPACPI_VIDEO_NEW &&
4815 strlencmp(cmd, "dvi_enable") == 0) {
4816 enable |= TP_ACPI_VIDEO_S_DVI;
4817 } else if (video_supported == TPACPI_VIDEO_NEW &&
4818 strlencmp(cmd, "dvi_disable") == 0) {
4819 disable |= TP_ACPI_VIDEO_S_DVI;
4820 } else if (strlencmp(cmd, "auto_enable") == 0) {
4821 res = video_autosw_set(1);
4822 if (res)
4823 return res;
4824 } else if (strlencmp(cmd, "auto_disable") == 0) {
4825 res = video_autosw_set(0);
4826 if (res)
4827 return res;
4828 } else if (strlencmp(cmd, "video_switch") == 0) {
4829 res = video_outputsw_cycle();
4830 if (res)
4831 return res;
4832 } else if (strlencmp(cmd, "expand_toggle") == 0) {
4833 res = video_expand_toggle();
4834 if (res)
4835 return res;
4836 } else
4837 return -EINVAL;
4838 }
4839
4840 if (enable || disable) {
4841 status = video_outputsw_get();
4842 if (status < 0)
4843 return status;
4844 res = video_outputsw_set((status & ~disable) | enable);
4845 if (res)
4846 return res;
4847 }
4848
4849 return 0;
4850 }
4851
4852 static struct ibm_struct video_driver_data = {
4853 .name = "video",
4854 .read = video_read,
4855 .write = video_write,
4856 .exit = video_exit,
4857 };
4858
4859 #endif /* CONFIG_THINKPAD_ACPI_VIDEO */
4860
4861 /*************************************************************************
4862 * Light (thinklight) subdriver
4863 */
4864
4865 TPACPI_HANDLE(lght, root, "\\LGHT"); /* A21e, A2xm/p, T20-22, X20-21 */
4866 TPACPI_HANDLE(ledb, ec, "LEDB"); /* G4x */
4867
4868 static int light_get_status(void)
4869 {
4870 int status = 0;
4871
4872 if (tp_features.light_status) {
4873 if (!acpi_evalf(ec_handle, &status, "KBLT", "d"))
4874 return -EIO;
4875 return (!!status);
4876 }
4877
4878 return -ENXIO;
4879 }
4880
4881 static int light_set_status(int status)
4882 {
4883 int rc;
4884
4885 if (tp_features.light) {
4886 if (cmos_handle) {
4887 rc = acpi_evalf(cmos_handle, NULL, NULL, "vd",
4888 (status) ?
4889 TP_CMOS_THINKLIGHT_ON :
4890 TP_CMOS_THINKLIGHT_OFF);
4891 } else {
4892 rc = acpi_evalf(lght_handle, NULL, NULL, "vd",
4893 (status) ? 1 : 0);
4894 }
4895 return (rc) ? 0 : -EIO;
4896 }
4897
4898 return -ENXIO;
4899 }
4900
4901 static void light_set_status_worker(struct work_struct *work)
4902 {
4903 struct tpacpi_led_classdev *data =
4904 container_of(work, struct tpacpi_led_classdev, work);
4905
4906 if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING))
4907 light_set_status((data->new_state != TPACPI_LED_OFF));
4908 }
4909
4910 static void light_sysfs_set(struct led_classdev *led_cdev,
4911 enum led_brightness brightness)
4912 {
4913 struct tpacpi_led_classdev *data =
4914 container_of(led_cdev,
4915 struct tpacpi_led_classdev,
4916 led_classdev);
4917 data->new_state = (brightness != LED_OFF) ?
4918 TPACPI_LED_ON : TPACPI_LED_OFF;
4919 queue_work(tpacpi_wq, &data->work);
4920 }
4921
4922 static enum led_brightness light_sysfs_get(struct led_classdev *led_cdev)
4923 {
4924 return (light_get_status() == 1) ? LED_FULL : LED_OFF;
4925 }
4926
4927 static struct tpacpi_led_classdev tpacpi_led_thinklight = {
4928 .led_classdev = {
4929 .name = "tpacpi::thinklight",
4930 .brightness_set = &light_sysfs_set,
4931 .brightness_get = &light_sysfs_get,
4932 }
4933 };
4934
4935 static int __init light_init(struct ibm_init_struct *iibm)
4936 {
4937 int rc;
4938
4939 vdbg_printk(TPACPI_DBG_INIT, "initializing light subdriver\n");
4940
4941 if (tpacpi_is_ibm()) {
4942 TPACPI_ACPIHANDLE_INIT(ledb);
4943 TPACPI_ACPIHANDLE_INIT(lght);
4944 }
4945 TPACPI_ACPIHANDLE_INIT(cmos);
4946 INIT_WORK(&tpacpi_led_thinklight.work, light_set_status_worker);
4947
4948 /* light not supported on 570, 600e/x, 770e, 770x, G4x, R30, R31 */
4949 tp_features.light = (cmos_handle || lght_handle) && !ledb_handle;
4950
4951 if (tp_features.light)
4952 /* light status not supported on
4953 570, 600e/x, 770e, 770x, G4x, R30, R31, R32, X20 */
4954 tp_features.light_status =
4955 acpi_evalf(ec_handle, NULL, "KBLT", "qv");
4956
4957 vdbg_printk(TPACPI_DBG_INIT, "light is %s, light status is %s\n",
4958 str_supported(tp_features.light),
4959 str_supported(tp_features.light_status));
4960
4961 if (!tp_features.light)
4962 return 1;
4963
4964 rc = led_classdev_register(&tpacpi_pdev->dev,
4965 &tpacpi_led_thinklight.led_classdev);
4966
4967 if (rc < 0) {
4968 tp_features.light = 0;
4969 tp_features.light_status = 0;
4970 } else {
4971 rc = 0;
4972 }
4973
4974 return rc;
4975 }
4976
4977 static void light_exit(void)
4978 {
4979 led_classdev_unregister(&tpacpi_led_thinklight.led_classdev);
4980 flush_workqueue(tpacpi_wq);
4981 }
4982
4983 static int light_read(struct seq_file *m)
4984 {
4985 int status;
4986
4987 if (!tp_features.light) {
4988 seq_printf(m, "status:\t\tnot supported\n");
4989 } else if (!tp_features.light_status) {
4990 seq_printf(m, "status:\t\tunknown\n");
4991 seq_printf(m, "commands:\ton, off\n");
4992 } else {
4993 status = light_get_status();
4994 if (status < 0)
4995 return status;
4996 seq_printf(m, "status:\t\t%s\n", onoff(status, 0));
4997 seq_printf(m, "commands:\ton, off\n");
4998 }
4999
5000 return 0;
5001 }
5002
5003 static int light_write(char *buf)
5004 {
5005 char *cmd;
5006 int newstatus = 0;
5007
5008 if (!tp_features.light)
5009 return -ENODEV;
5010
5011 while ((cmd = next_cmd(&buf))) {
5012 if (strlencmp(cmd, "on") == 0) {
5013 newstatus = 1;
5014 } else if (strlencmp(cmd, "off") == 0) {
5015 newstatus = 0;
5016 } else
5017 return -EINVAL;
5018 }
5019
5020 return light_set_status(newstatus);
5021 }
5022
5023 static struct ibm_struct light_driver_data = {
5024 .name = "light",
5025 .read = light_read,
5026 .write = light_write,
5027 .exit = light_exit,
5028 };
5029
5030 /*************************************************************************
5031 * CMOS subdriver
5032 */
5033
5034 /* sysfs cmos_command -------------------------------------------------- */
5035 static ssize_t cmos_command_store(struct device *dev,
5036 struct device_attribute *attr,
5037 const char *buf, size_t count)
5038 {
5039 unsigned long cmos_cmd;
5040 int res;
5041
5042 if (parse_strtoul(buf, 21, &cmos_cmd))
5043 return -EINVAL;
5044
5045 res = issue_thinkpad_cmos_command(cmos_cmd);
5046 return (res) ? res : count;
5047 }
5048
5049 static struct device_attribute dev_attr_cmos_command =
5050 __ATTR(cmos_command, S_IWUSR, NULL, cmos_command_store);
5051
5052 /* --------------------------------------------------------------------- */
5053
5054 static int __init cmos_init(struct ibm_init_struct *iibm)
5055 {
5056 int res;
5057
5058 vdbg_printk(TPACPI_DBG_INIT,
5059 "initializing cmos commands subdriver\n");
5060
5061 TPACPI_ACPIHANDLE_INIT(cmos);
5062
5063 vdbg_printk(TPACPI_DBG_INIT, "cmos commands are %s\n",
5064 str_supported(cmos_handle != NULL));
5065
5066 res = device_create_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
5067 if (res)
5068 return res;
5069
5070 return (cmos_handle) ? 0 : 1;
5071 }
5072
5073 static void cmos_exit(void)
5074 {
5075 device_remove_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
5076 }
5077
5078 static int cmos_read(struct seq_file *m)
5079 {
5080 /* cmos not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
5081 R30, R31, T20-22, X20-21 */
5082 if (!cmos_handle)
5083 seq_printf(m, "status:\t\tnot supported\n");
5084 else {
5085 seq_printf(m, "status:\t\tsupported\n");
5086 seq_printf(m, "commands:\t<cmd> (<cmd> is 0-21)\n");
5087 }
5088
5089 return 0;
5090 }
5091
5092 static int cmos_write(char *buf)
5093 {
5094 char *cmd;
5095 int cmos_cmd, res;
5096
5097 while ((cmd = next_cmd(&buf))) {
5098 if (sscanf(cmd, "%u", &cmos_cmd) == 1 &&
5099 cmos_cmd >= 0 && cmos_cmd <= 21) {
5100 /* cmos_cmd set */
5101 } else
5102 return -EINVAL;
5103
5104 res = issue_thinkpad_cmos_command(cmos_cmd);
5105 if (res)
5106 return res;
5107 }
5108
5109 return 0;
5110 }
5111
5112 static struct ibm_struct cmos_driver_data = {
5113 .name = "cmos",
5114 .read = cmos_read,
5115 .write = cmos_write,
5116 .exit = cmos_exit,
5117 };
5118
5119 /*************************************************************************
5120 * LED subdriver
5121 */
5122
5123 enum led_access_mode {
5124 TPACPI_LED_NONE = 0,
5125 TPACPI_LED_570, /* 570 */
5126 TPACPI_LED_OLD, /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
5127 TPACPI_LED_NEW, /* all others */
5128 };
5129
5130 enum { /* For TPACPI_LED_OLD */
5131 TPACPI_LED_EC_HLCL = 0x0c, /* EC reg to get led to power on */
5132 TPACPI_LED_EC_HLBL = 0x0d, /* EC reg to blink a lit led */
5133 TPACPI_LED_EC_HLMS = 0x0e, /* EC reg to select led to command */
5134 };
5135
5136 static enum led_access_mode led_supported;
5137
5138 static acpi_handle led_handle;
5139
5140 #define TPACPI_LED_NUMLEDS 16
5141 static struct tpacpi_led_classdev *tpacpi_leds;
5142 static enum led_status_t tpacpi_led_state_cache[TPACPI_LED_NUMLEDS];
5143 static const char * const tpacpi_led_names[TPACPI_LED_NUMLEDS] = {
5144 /* there's a limit of 19 chars + NULL before 2.6.26 */
5145 "tpacpi::power",
5146 "tpacpi:orange:batt",
5147 "tpacpi:green:batt",
5148 "tpacpi::dock_active",
5149 "tpacpi::bay_active",
5150 "tpacpi::dock_batt",
5151 "tpacpi::unknown_led",
5152 "tpacpi::standby",
5153 "tpacpi::dock_status1",
5154 "tpacpi::dock_status2",
5155 "tpacpi::unknown_led2",
5156 "tpacpi::unknown_led3",
5157 "tpacpi::thinkvantage",
5158 };
5159 #define TPACPI_SAFE_LEDS 0x1081U
5160
5161 static inline bool tpacpi_is_led_restricted(const unsigned int led)
5162 {
5163 #ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS
5164 return false;
5165 #else
5166 return (1U & (TPACPI_SAFE_LEDS >> led)) == 0;
5167 #endif
5168 }
5169
5170 static int led_get_status(const unsigned int led)
5171 {
5172 int status;
5173 enum led_status_t led_s;
5174
5175 switch (led_supported) {
5176 case TPACPI_LED_570:
5177 if (!acpi_evalf(ec_handle,
5178 &status, "GLED", "dd", 1 << led))
5179 return -EIO;
5180 led_s = (status == 0) ?
5181 TPACPI_LED_OFF :
5182 ((status == 1) ?
5183 TPACPI_LED_ON :
5184 TPACPI_LED_BLINK);
5185 tpacpi_led_state_cache[led] = led_s;
5186 return led_s;
5187 default:
5188 return -ENXIO;
5189 }
5190
5191 /* not reached */
5192 }
5193
5194 static int led_set_status(const unsigned int led,
5195 const enum led_status_t ledstatus)
5196 {
5197 /* off, on, blink. Index is led_status_t */
5198 static const unsigned int led_sled_arg1[] = { 0, 1, 3 };
5199 static const unsigned int led_led_arg1[] = { 0, 0x80, 0xc0 };
5200
5201 int rc = 0;
5202
5203 switch (led_supported) {
5204 case TPACPI_LED_570:
5205 /* 570 */
5206 if (unlikely(led > 7))
5207 return -EINVAL;
5208 if (unlikely(tpacpi_is_led_restricted(led)))
5209 return -EPERM;
5210 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
5211 (1 << led), led_sled_arg1[ledstatus]))
5212 rc = -EIO;
5213 break;
5214 case TPACPI_LED_OLD:
5215 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */
5216 if (unlikely(led > 7))
5217 return -EINVAL;
5218 if (unlikely(tpacpi_is_led_restricted(led)))
5219 return -EPERM;
5220 rc = ec_write(TPACPI_LED_EC_HLMS, (1 << led));
5221 if (rc >= 0)
5222 rc = ec_write(TPACPI_LED_EC_HLBL,
5223 (ledstatus == TPACPI_LED_BLINK) << led);
5224 if (rc >= 0)
5225 rc = ec_write(TPACPI_LED_EC_HLCL,
5226 (ledstatus != TPACPI_LED_OFF) << led);
5227 break;
5228 case TPACPI_LED_NEW:
5229 /* all others */
5230 if (unlikely(led >= TPACPI_LED_NUMLEDS))
5231 return -EINVAL;
5232 if (unlikely(tpacpi_is_led_restricted(led)))
5233 return -EPERM;
5234 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
5235 led, led_led_arg1[ledstatus]))
5236 rc = -EIO;
5237 break;
5238 default:
5239 rc = -ENXIO;
5240 }
5241
5242 if (!rc)
5243 tpacpi_led_state_cache[led] = ledstatus;
5244
5245 return rc;
5246 }
5247
5248 static void led_set_status_worker(struct work_struct *work)
5249 {
5250 struct tpacpi_led_classdev *data =
5251 container_of(work, struct tpacpi_led_classdev, work);
5252
5253 if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING))
5254 led_set_status(data->led, data->new_state);
5255 }
5256
5257 static void led_sysfs_set(struct led_classdev *led_cdev,
5258 enum led_brightness brightness)
5259 {
5260 struct tpacpi_led_classdev *data = container_of(led_cdev,
5261 struct tpacpi_led_classdev, led_classdev);
5262
5263 if (brightness == LED_OFF)
5264 data->new_state = TPACPI_LED_OFF;
5265 else if (tpacpi_led_state_cache[data->led] != TPACPI_LED_BLINK)
5266 data->new_state = TPACPI_LED_ON;
5267 else
5268 data->new_state = TPACPI_LED_BLINK;
5269
5270 queue_work(tpacpi_wq, &data->work);
5271 }
5272
5273 static int led_sysfs_blink_set(struct led_classdev *led_cdev,
5274 unsigned long *delay_on, unsigned long *delay_off)
5275 {
5276 struct tpacpi_led_classdev *data = container_of(led_cdev,
5277 struct tpacpi_led_classdev, led_classdev);
5278
5279 /* Can we choose the flash rate? */
5280 if (*delay_on == 0 && *delay_off == 0) {
5281 /* yes. set them to the hardware blink rate (1 Hz) */
5282 *delay_on = 500; /* ms */
5283 *delay_off = 500; /* ms */
5284 } else if ((*delay_on != 500) || (*delay_off != 500))
5285 return -EINVAL;
5286
5287 data->new_state = TPACPI_LED_BLINK;
5288 queue_work(tpacpi_wq, &data->work);
5289
5290 return 0;
5291 }
5292
5293 static enum led_brightness led_sysfs_get(struct led_classdev *led_cdev)
5294 {
5295 int rc;
5296
5297 struct tpacpi_led_classdev *data = container_of(led_cdev,
5298 struct tpacpi_led_classdev, led_classdev);
5299
5300 rc = led_get_status(data->led);
5301
5302 if (rc == TPACPI_LED_OFF || rc < 0)
5303 rc = LED_OFF; /* no error handling in led class :( */
5304 else
5305 rc = LED_FULL;
5306
5307 return rc;
5308 }
5309
5310 static void led_exit(void)
5311 {
5312 unsigned int i;
5313
5314 for (i = 0; i < TPACPI_LED_NUMLEDS; i++) {
5315 if (tpacpi_leds[i].led_classdev.name)
5316 led_classdev_unregister(&tpacpi_leds[i].led_classdev);
5317 }
5318
5319 flush_workqueue(tpacpi_wq);
5320 kfree(tpacpi_leds);
5321 }
5322
5323 static int __init tpacpi_init_led(unsigned int led)
5324 {
5325 int rc;
5326
5327 tpacpi_leds[led].led = led;
5328
5329 /* LEDs with no name don't get registered */
5330 if (!tpacpi_led_names[led])
5331 return 0;
5332
5333 tpacpi_leds[led].led_classdev.brightness_set = &led_sysfs_set;
5334 tpacpi_leds[led].led_classdev.blink_set = &led_sysfs_blink_set;
5335 if (led_supported == TPACPI_LED_570)
5336 tpacpi_leds[led].led_classdev.brightness_get =
5337 &led_sysfs_get;
5338
5339 tpacpi_leds[led].led_classdev.name = tpacpi_led_names[led];
5340
5341 INIT_WORK(&tpacpi_leds[led].work, led_set_status_worker);
5342
5343 rc = led_classdev_register(&tpacpi_pdev->dev,
5344 &tpacpi_leds[led].led_classdev);
5345 if (rc < 0)
5346 tpacpi_leds[led].led_classdev.name = NULL;
5347
5348 return rc;
5349 }
5350
5351 static const struct tpacpi_quirk led_useful_qtable[] __initconst = {
5352 TPACPI_Q_IBM('1', 'E', 0x009f), /* A30 */
5353 TPACPI_Q_IBM('1', 'N', 0x009f), /* A31 */
5354 TPACPI_Q_IBM('1', 'G', 0x009f), /* A31 */
5355
5356 TPACPI_Q_IBM('1', 'I', 0x0097), /* T30 */
5357 TPACPI_Q_IBM('1', 'R', 0x0097), /* T40, T41, T42, R50, R51 */
5358 TPACPI_Q_IBM('7', '0', 0x0097), /* T43, R52 */
5359 TPACPI_Q_IBM('1', 'Y', 0x0097), /* T43 */
5360 TPACPI_Q_IBM('1', 'W', 0x0097), /* R50e */
5361 TPACPI_Q_IBM('1', 'V', 0x0097), /* R51 */
5362 TPACPI_Q_IBM('7', '8', 0x0097), /* R51e */
5363 TPACPI_Q_IBM('7', '6', 0x0097), /* R52 */
5364
5365 TPACPI_Q_IBM('1', 'K', 0x00bf), /* X30 */
5366 TPACPI_Q_IBM('1', 'Q', 0x00bf), /* X31, X32 */
5367 TPACPI_Q_IBM('1', 'U', 0x00bf), /* X40 */
5368 TPACPI_Q_IBM('7', '4', 0x00bf), /* X41 */
5369 TPACPI_Q_IBM('7', '5', 0x00bf), /* X41t */
5370
5371 TPACPI_Q_IBM('7', '9', 0x1f97), /* T60 (1) */
5372 TPACPI_Q_IBM('7', '7', 0x1f97), /* Z60* (1) */
5373 TPACPI_Q_IBM('7', 'F', 0x1f97), /* Z61* (1) */
5374 TPACPI_Q_IBM('7', 'B', 0x1fb7), /* X60 (1) */
5375
5376 /* (1) - may have excess leds enabled on MSB */
5377
5378 /* Defaults (order matters, keep last, don't reorder!) */
5379 { /* Lenovo */
5380 .vendor = PCI_VENDOR_ID_LENOVO,
5381 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY,
5382 .quirks = 0x1fffU,
5383 },
5384 { /* IBM ThinkPads with no EC version string */
5385 .vendor = PCI_VENDOR_ID_IBM,
5386 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_UNKNOWN,
5387 .quirks = 0x00ffU,
5388 },
5389 { /* IBM ThinkPads with EC version string */
5390 .vendor = PCI_VENDOR_ID_IBM,
5391 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY,
5392 .quirks = 0x00bfU,
5393 },
5394 };
5395
5396 #undef TPACPI_LEDQ_IBM
5397 #undef TPACPI_LEDQ_LNV
5398
5399 static enum led_access_mode __init led_init_detect_mode(void)
5400 {
5401 acpi_status status;
5402
5403 if (tpacpi_is_ibm()) {
5404 /* 570 */
5405 status = acpi_get_handle(ec_handle, "SLED", &led_handle);
5406 if (ACPI_SUCCESS(status))
5407 return TPACPI_LED_570;
5408
5409 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
5410 status = acpi_get_handle(ec_handle, "SYSL", &led_handle);
5411 if (ACPI_SUCCESS(status))
5412 return TPACPI_LED_OLD;
5413 }
5414
5415 /* most others */
5416 status = acpi_get_handle(ec_handle, "LED", &led_handle);
5417 if (ACPI_SUCCESS(status))
5418 return TPACPI_LED_NEW;
5419
5420 /* R30, R31, and unknown firmwares */
5421 led_handle = NULL;
5422 return TPACPI_LED_NONE;
5423 }
5424
5425 static int __init led_init(struct ibm_init_struct *iibm)
5426 {
5427 unsigned int i;
5428 int rc;
5429 unsigned long useful_leds;
5430
5431 vdbg_printk(TPACPI_DBG_INIT, "initializing LED subdriver\n");
5432
5433 led_supported = led_init_detect_mode();
5434
5435 if (led_supported != TPACPI_LED_NONE) {
5436 useful_leds = tpacpi_check_quirks(led_useful_qtable,
5437 ARRAY_SIZE(led_useful_qtable));
5438
5439 if (!useful_leds) {
5440 led_handle = NULL;
5441 led_supported = TPACPI_LED_NONE;
5442 }
5443 }
5444
5445 vdbg_printk(TPACPI_DBG_INIT, "LED commands are %s, mode %d\n",
5446 str_supported(led_supported), led_supported);
5447
5448 if (led_supported == TPACPI_LED_NONE)
5449 return 1;
5450
5451 tpacpi_leds = kzalloc(sizeof(*tpacpi_leds) * TPACPI_LED_NUMLEDS,
5452 GFP_KERNEL);
5453 if (!tpacpi_leds) {
5454 pr_err("Out of memory for LED data\n");
5455 return -ENOMEM;
5456 }
5457
5458 for (i = 0; i < TPACPI_LED_NUMLEDS; i++) {
5459 tpacpi_leds[i].led = -1;
5460
5461 if (!tpacpi_is_led_restricted(i) &&
5462 test_bit(i, &useful_leds)) {
5463 rc = tpacpi_init_led(i);
5464 if (rc < 0) {
5465 led_exit();
5466 return rc;
5467 }
5468 }
5469 }
5470
5471 #ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS
5472 pr_notice("warning: userspace override of important "
5473 "firmware LEDs is enabled\n");
5474 #endif
5475 return 0;
5476 }
5477
5478 #define str_led_status(s) \
5479 ((s) == TPACPI_LED_OFF ? "off" : \
5480 ((s) == TPACPI_LED_ON ? "on" : "blinking"))
5481
5482 static int led_read(struct seq_file *m)
5483 {
5484 if (!led_supported) {
5485 seq_printf(m, "status:\t\tnot supported\n");
5486 return 0;
5487 }
5488 seq_printf(m, "status:\t\tsupported\n");
5489
5490 if (led_supported == TPACPI_LED_570) {
5491 /* 570 */
5492 int i, status;
5493 for (i = 0; i < 8; i++) {
5494 status = led_get_status(i);
5495 if (status < 0)
5496 return -EIO;
5497 seq_printf(m, "%d:\t\t%s\n",
5498 i, str_led_status(status));
5499 }
5500 }
5501
5502 seq_printf(m, "commands:\t"
5503 "<led> on, <led> off, <led> blink (<led> is 0-15)\n");
5504
5505 return 0;
5506 }
5507
5508 static int led_write(char *buf)
5509 {
5510 char *cmd;
5511 int led, rc;
5512 enum led_status_t s;
5513
5514 if (!led_supported)
5515 return -ENODEV;
5516
5517 while ((cmd = next_cmd(&buf))) {
5518 if (sscanf(cmd, "%d", &led) != 1)
5519 return -EINVAL;
5520
5521 if (led < 0 || led > (TPACPI_LED_NUMLEDS - 1) ||
5522 tpacpi_leds[led].led < 0)
5523 return -ENODEV;
5524
5525 if (strstr(cmd, "off")) {
5526 s = TPACPI_LED_OFF;
5527 } else if (strstr(cmd, "on")) {
5528 s = TPACPI_LED_ON;
5529 } else if (strstr(cmd, "blink")) {
5530 s = TPACPI_LED_BLINK;
5531 } else {
5532 return -EINVAL;
5533 }
5534
5535 rc = led_set_status(led, s);
5536 if (rc < 0)
5537 return rc;
5538 }
5539
5540 return 0;
5541 }
5542
5543 static struct ibm_struct led_driver_data = {
5544 .name = "led",
5545 .read = led_read,
5546 .write = led_write,
5547 .exit = led_exit,
5548 };
5549
5550 /*************************************************************************
5551 * Beep subdriver
5552 */
5553
5554 TPACPI_HANDLE(beep, ec, "BEEP"); /* all except R30, R31 */
5555
5556 #define TPACPI_BEEP_Q1 0x0001
5557
5558 static const struct tpacpi_quirk beep_quirk_table[] __initconst = {
5559 TPACPI_Q_IBM('I', 'M', TPACPI_BEEP_Q1), /* 570 */
5560 TPACPI_Q_IBM('I', 'U', TPACPI_BEEP_Q1), /* 570E - unverified */
5561 };
5562
5563 static int __init beep_init(struct ibm_init_struct *iibm)
5564 {
5565 unsigned long quirks;
5566
5567 vdbg_printk(TPACPI_DBG_INIT, "initializing beep subdriver\n");
5568
5569 TPACPI_ACPIHANDLE_INIT(beep);
5570
5571 vdbg_printk(TPACPI_DBG_INIT, "beep is %s\n",
5572 str_supported(beep_handle != NULL));
5573
5574 quirks = tpacpi_check_quirks(beep_quirk_table,
5575 ARRAY_SIZE(beep_quirk_table));
5576
5577 tp_features.beep_needs_two_args = !!(quirks & TPACPI_BEEP_Q1);
5578
5579 return (beep_handle) ? 0 : 1;
5580 }
5581
5582 static int beep_read(struct seq_file *m)
5583 {
5584 if (!beep_handle)
5585 seq_printf(m, "status:\t\tnot supported\n");
5586 else {
5587 seq_printf(m, "status:\t\tsupported\n");
5588 seq_printf(m, "commands:\t<cmd> (<cmd> is 0-17)\n");
5589 }
5590
5591 return 0;
5592 }
5593
5594 static int beep_write(char *buf)
5595 {
5596 char *cmd;
5597 int beep_cmd;
5598
5599 if (!beep_handle)
5600 return -ENODEV;
5601
5602 while ((cmd = next_cmd(&buf))) {
5603 if (sscanf(cmd, "%u", &beep_cmd) == 1 &&
5604 beep_cmd >= 0 && beep_cmd <= 17) {
5605 /* beep_cmd set */
5606 } else
5607 return -EINVAL;
5608 if (tp_features.beep_needs_two_args) {
5609 if (!acpi_evalf(beep_handle, NULL, NULL, "vdd",
5610 beep_cmd, 0))
5611 return -EIO;
5612 } else {
5613 if (!acpi_evalf(beep_handle, NULL, NULL, "vd",
5614 beep_cmd))
5615 return -EIO;
5616 }
5617 }
5618
5619 return 0;
5620 }
5621
5622 static struct ibm_struct beep_driver_data = {
5623 .name = "beep",
5624 .read = beep_read,
5625 .write = beep_write,
5626 };
5627
5628 /*************************************************************************
5629 * Thermal subdriver
5630 */
5631
5632 enum thermal_access_mode {
5633 TPACPI_THERMAL_NONE = 0, /* No thermal support */
5634 TPACPI_THERMAL_ACPI_TMP07, /* Use ACPI TMP0-7 */
5635 TPACPI_THERMAL_ACPI_UPDT, /* Use ACPI TMP0-7 with UPDT */
5636 TPACPI_THERMAL_TPEC_8, /* Use ACPI EC regs, 8 sensors */
5637 TPACPI_THERMAL_TPEC_16, /* Use ACPI EC regs, 16 sensors */
5638 };
5639
5640 enum { /* TPACPI_THERMAL_TPEC_* */
5641 TP_EC_THERMAL_TMP0 = 0x78, /* ACPI EC regs TMP 0..7 */
5642 TP_EC_THERMAL_TMP8 = 0xC0, /* ACPI EC regs TMP 8..15 */
5643 TP_EC_THERMAL_TMP_NA = -128, /* ACPI EC sensor not available */
5644
5645 TPACPI_THERMAL_SENSOR_NA = -128000, /* Sensor not available */
5646 };
5647
5648
5649 #define TPACPI_MAX_THERMAL_SENSORS 16 /* Max thermal sensors supported */
5650 struct ibm_thermal_sensors_struct {
5651 s32 temp[TPACPI_MAX_THERMAL_SENSORS];
5652 };
5653
5654 static enum thermal_access_mode thermal_read_mode;
5655
5656 /* idx is zero-based */
5657 static int thermal_get_sensor(int idx, s32 *value)
5658 {
5659 int t;
5660 s8 tmp;
5661 char tmpi[5];
5662
5663 t = TP_EC_THERMAL_TMP0;
5664
5665 switch (thermal_read_mode) {
5666 #if TPACPI_MAX_THERMAL_SENSORS >= 16
5667 case TPACPI_THERMAL_TPEC_16:
5668 if (idx >= 8 && idx <= 15) {
5669 t = TP_EC_THERMAL_TMP8;
5670 idx -= 8;
5671 }
5672 /* fallthrough */
5673 #endif
5674 case TPACPI_THERMAL_TPEC_8:
5675 if (idx <= 7) {
5676 if (!acpi_ec_read(t + idx, &tmp))
5677 return -EIO;
5678 *value = tmp * 1000;
5679 return 0;
5680 }
5681 break;
5682
5683 case TPACPI_THERMAL_ACPI_UPDT:
5684 if (idx <= 7) {
5685 snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
5686 if (!acpi_evalf(ec_handle, NULL, "UPDT", "v"))
5687 return -EIO;
5688 if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
5689 return -EIO;
5690 *value = (t - 2732) * 100;
5691 return 0;
5692 }
5693 break;
5694
5695 case TPACPI_THERMAL_ACPI_TMP07:
5696 if (idx <= 7) {
5697 snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
5698 if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
5699 return -EIO;
5700 if (t > 127 || t < -127)
5701 t = TP_EC_THERMAL_TMP_NA;
5702 *value = t * 1000;
5703 return 0;
5704 }
5705 break;
5706
5707 case TPACPI_THERMAL_NONE:
5708 default:
5709 return -ENOSYS;
5710 }
5711
5712 return -EINVAL;
5713 }
5714
5715 static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s)
5716 {
5717 int res, i;
5718 int n;
5719
5720 n = 8;
5721 i = 0;
5722
5723 if (!s)
5724 return -EINVAL;
5725
5726 if (thermal_read_mode == TPACPI_THERMAL_TPEC_16)
5727 n = 16;
5728
5729 for (i = 0 ; i < n; i++) {
5730 res = thermal_get_sensor(i, &s->temp[i]);
5731 if (res)
5732 return res;
5733 }
5734
5735 return n;
5736 }
5737
5738 static void thermal_dump_all_sensors(void)
5739 {
5740 int n, i;
5741 struct ibm_thermal_sensors_struct t;
5742
5743 n = thermal_get_sensors(&t);
5744 if (n <= 0)
5745 return;
5746
5747 pr_notice("temperatures (Celsius):");
5748
5749 for (i = 0; i < n; i++) {
5750 if (t.temp[i] != TPACPI_THERMAL_SENSOR_NA)
5751 pr_cont(" %d", (int)(t.temp[i] / 1000));
5752 else
5753 pr_cont(" N/A");
5754 }
5755
5756 pr_cont("\n");
5757 }
5758
5759 /* sysfs temp##_input -------------------------------------------------- */
5760
5761 static ssize_t thermal_temp_input_show(struct device *dev,
5762 struct device_attribute *attr,
5763 char *buf)
5764 {
5765 struct sensor_device_attribute *sensor_attr =
5766 to_sensor_dev_attr(attr);
5767 int idx = sensor_attr->index;
5768 s32 value;
5769 int res;
5770
5771 res = thermal_get_sensor(idx, &value);
5772 if (res)
5773 return res;
5774 if (value == TPACPI_THERMAL_SENSOR_NA)
5775 return -ENXIO;
5776
5777 return snprintf(buf, PAGE_SIZE, "%d\n", value);
5778 }
5779
5780 #define THERMAL_SENSOR_ATTR_TEMP(_idxA, _idxB) \
5781 SENSOR_ATTR(temp##_idxA##_input, S_IRUGO, \
5782 thermal_temp_input_show, NULL, _idxB)
5783
5784 static struct sensor_device_attribute sensor_dev_attr_thermal_temp_input[] = {
5785 THERMAL_SENSOR_ATTR_TEMP(1, 0),
5786 THERMAL_SENSOR_ATTR_TEMP(2, 1),
5787 THERMAL_SENSOR_ATTR_TEMP(3, 2),
5788 THERMAL_SENSOR_ATTR_TEMP(4, 3),
5789 THERMAL_SENSOR_ATTR_TEMP(5, 4),
5790 THERMAL_SENSOR_ATTR_TEMP(6, 5),
5791 THERMAL_SENSOR_ATTR_TEMP(7, 6),
5792 THERMAL_SENSOR_ATTR_TEMP(8, 7),
5793 THERMAL_SENSOR_ATTR_TEMP(9, 8),
5794 THERMAL_SENSOR_ATTR_TEMP(10, 9),
5795 THERMAL_SENSOR_ATTR_TEMP(11, 10),
5796 THERMAL_SENSOR_ATTR_TEMP(12, 11),
5797 THERMAL_SENSOR_ATTR_TEMP(13, 12),
5798 THERMAL_SENSOR_ATTR_TEMP(14, 13),
5799 THERMAL_SENSOR_ATTR_TEMP(15, 14),
5800 THERMAL_SENSOR_ATTR_TEMP(16, 15),
5801 };
5802
5803 #define THERMAL_ATTRS(X) \
5804 &sensor_dev_attr_thermal_temp_input[X].dev_attr.attr
5805
5806 static struct attribute *thermal_temp_input_attr[] = {
5807 THERMAL_ATTRS(8),
5808 THERMAL_ATTRS(9),
5809 THERMAL_ATTRS(10),
5810 THERMAL_ATTRS(11),
5811 THERMAL_ATTRS(12),
5812 THERMAL_ATTRS(13),
5813 THERMAL_ATTRS(14),
5814 THERMAL_ATTRS(15),
5815 THERMAL_ATTRS(0),
5816 THERMAL_ATTRS(1),
5817 THERMAL_ATTRS(2),
5818 THERMAL_ATTRS(3),
5819 THERMAL_ATTRS(4),
5820 THERMAL_ATTRS(5),
5821 THERMAL_ATTRS(6),
5822 THERMAL_ATTRS(7),
5823 NULL
5824 };
5825
5826 static const struct attribute_group thermal_temp_input16_group = {
5827 .attrs = thermal_temp_input_attr
5828 };
5829
5830 static const struct attribute_group thermal_temp_input8_group = {
5831 .attrs = &thermal_temp_input_attr[8]
5832 };
5833
5834 #undef THERMAL_SENSOR_ATTR_TEMP
5835 #undef THERMAL_ATTRS
5836
5837 /* --------------------------------------------------------------------- */
5838
5839 static int __init thermal_init(struct ibm_init_struct *iibm)
5840 {
5841 u8 t, ta1, ta2;
5842 int i;
5843 int acpi_tmp7;
5844 int res;
5845
5846 vdbg_printk(TPACPI_DBG_INIT, "initializing thermal subdriver\n");
5847
5848 acpi_tmp7 = acpi_evalf(ec_handle, NULL, "TMP7", "qv");
5849
5850 if (thinkpad_id.ec_model) {
5851 /*
5852 * Direct EC access mode: sensors at registers
5853 * 0x78-0x7F, 0xC0-0xC7. Registers return 0x00 for
5854 * non-implemented, thermal sensors return 0x80 when
5855 * not available
5856 */
5857
5858 ta1 = ta2 = 0;
5859 for (i = 0; i < 8; i++) {
5860 if (acpi_ec_read(TP_EC_THERMAL_TMP0 + i, &t)) {
5861 ta1 |= t;
5862 } else {
5863 ta1 = 0;
5864 break;
5865 }
5866 if (acpi_ec_read(TP_EC_THERMAL_TMP8 + i, &t)) {
5867 ta2 |= t;
5868 } else {
5869 ta1 = 0;
5870 break;
5871 }
5872 }
5873 if (ta1 == 0) {
5874 /* This is sheer paranoia, but we handle it anyway */
5875 if (acpi_tmp7) {
5876 pr_err("ThinkPad ACPI EC access misbehaving, "
5877 "falling back to ACPI TMPx access "
5878 "mode\n");
5879 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
5880 } else {
5881 pr_err("ThinkPad ACPI EC access misbehaving, "
5882 "disabling thermal sensors access\n");
5883 thermal_read_mode = TPACPI_THERMAL_NONE;
5884 }
5885 } else {
5886 thermal_read_mode =
5887 (ta2 != 0) ?
5888 TPACPI_THERMAL_TPEC_16 : TPACPI_THERMAL_TPEC_8;
5889 }
5890 } else if (acpi_tmp7) {
5891 if (tpacpi_is_ibm() &&
5892 acpi_evalf(ec_handle, NULL, "UPDT", "qv")) {
5893 /* 600e/x, 770e, 770x */
5894 thermal_read_mode = TPACPI_THERMAL_ACPI_UPDT;
5895 } else {
5896 /* IBM/LENOVO DSDT EC.TMPx access, max 8 sensors */
5897 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
5898 }
5899 } else {
5900 /* temperatures not supported on 570, G4x, R30, R31, R32 */
5901 thermal_read_mode = TPACPI_THERMAL_NONE;
5902 }
5903
5904 vdbg_printk(TPACPI_DBG_INIT, "thermal is %s, mode %d\n",
5905 str_supported(thermal_read_mode != TPACPI_THERMAL_NONE),
5906 thermal_read_mode);
5907
5908 switch (thermal_read_mode) {
5909 case TPACPI_THERMAL_TPEC_16:
5910 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
5911 &thermal_temp_input16_group);
5912 if (res)
5913 return res;
5914 break;
5915 case TPACPI_THERMAL_TPEC_8:
5916 case TPACPI_THERMAL_ACPI_TMP07:
5917 case TPACPI_THERMAL_ACPI_UPDT:
5918 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
5919 &thermal_temp_input8_group);
5920 if (res)
5921 return res;
5922 break;
5923 case TPACPI_THERMAL_NONE:
5924 default:
5925 return 1;
5926 }
5927
5928 return 0;
5929 }
5930
5931 static void thermal_exit(void)
5932 {
5933 switch (thermal_read_mode) {
5934 case TPACPI_THERMAL_TPEC_16:
5935 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
5936 &thermal_temp_input16_group);
5937 break;
5938 case TPACPI_THERMAL_TPEC_8:
5939 case TPACPI_THERMAL_ACPI_TMP07:
5940 case TPACPI_THERMAL_ACPI_UPDT:
5941 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
5942 &thermal_temp_input8_group);
5943 break;
5944 case TPACPI_THERMAL_NONE:
5945 default:
5946 break;
5947 }
5948 }
5949
5950 static int thermal_read(struct seq_file *m)
5951 {
5952 int n, i;
5953 struct ibm_thermal_sensors_struct t;
5954
5955 n = thermal_get_sensors(&t);
5956 if (unlikely(n < 0))
5957 return n;
5958
5959 seq_printf(m, "temperatures:\t");
5960
5961 if (n > 0) {
5962 for (i = 0; i < (n - 1); i++)
5963 seq_printf(m, "%d ", t.temp[i] / 1000);
5964 seq_printf(m, "%d\n", t.temp[i] / 1000);
5965 } else
5966 seq_printf(m, "not supported\n");
5967
5968 return 0;
5969 }
5970
5971 static struct ibm_struct thermal_driver_data = {
5972 .name = "thermal",
5973 .read = thermal_read,
5974 .exit = thermal_exit,
5975 };
5976
5977 /*************************************************************************
5978 * Backlight/brightness subdriver
5979 */
5980
5981 #define TPACPI_BACKLIGHT_DEV_NAME "thinkpad_screen"
5982
5983 /*
5984 * ThinkPads can read brightness from two places: EC HBRV (0x31), or
5985 * CMOS NVRAM byte 0x5E, bits 0-3.
5986 *
5987 * EC HBRV (0x31) has the following layout
5988 * Bit 7: unknown function
5989 * Bit 6: unknown function
5990 * Bit 5: Z: honour scale changes, NZ: ignore scale changes
5991 * Bit 4: must be set to zero to avoid problems
5992 * Bit 3-0: backlight brightness level
5993 *
5994 * brightness_get_raw returns status data in the HBRV layout
5995 *
5996 * WARNING: The X61 has been verified to use HBRV for something else, so
5997 * this should be used _only_ on IBM ThinkPads, and maybe with some careful
5998 * testing on the very early *60 Lenovo models...
5999 */
6000
6001 enum {
6002 TP_EC_BACKLIGHT = 0x31,
6003
6004 /* TP_EC_BACKLIGHT bitmasks */
6005 TP_EC_BACKLIGHT_LVLMSK = 0x1F,
6006 TP_EC_BACKLIGHT_CMDMSK = 0xE0,
6007 TP_EC_BACKLIGHT_MAPSW = 0x20,
6008 };
6009
6010 enum tpacpi_brightness_access_mode {
6011 TPACPI_BRGHT_MODE_AUTO = 0, /* Not implemented yet */
6012 TPACPI_BRGHT_MODE_EC, /* EC control */
6013 TPACPI_BRGHT_MODE_UCMS_STEP, /* UCMS step-based control */
6014 TPACPI_BRGHT_MODE_ECNVRAM, /* EC control w/ NVRAM store */
6015 TPACPI_BRGHT_MODE_MAX
6016 };
6017
6018 static struct backlight_device *ibm_backlight_device;
6019
6020 static enum tpacpi_brightness_access_mode brightness_mode =
6021 TPACPI_BRGHT_MODE_MAX;
6022
6023 static unsigned int brightness_enable = 2; /* 2 = auto, 0 = no, 1 = yes */
6024
6025 static struct mutex brightness_mutex;
6026
6027 /* NVRAM brightness access,
6028 * call with brightness_mutex held! */
6029 static unsigned int tpacpi_brightness_nvram_get(void)
6030 {
6031 u8 lnvram;
6032
6033 lnvram = (nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS)
6034 & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
6035 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
6036 lnvram &= bright_maxlvl;
6037
6038 return lnvram;
6039 }
6040
6041 static void tpacpi_brightness_checkpoint_nvram(void)
6042 {
6043 u8 lec = 0;
6044 u8 b_nvram;
6045
6046 if (brightness_mode != TPACPI_BRGHT_MODE_ECNVRAM)
6047 return;
6048
6049 vdbg_printk(TPACPI_DBG_BRGHT,
6050 "trying to checkpoint backlight level to NVRAM...\n");
6051
6052 if (mutex_lock_killable(&brightness_mutex) < 0)
6053 return;
6054
6055 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
6056 goto unlock;
6057 lec &= TP_EC_BACKLIGHT_LVLMSK;
6058 b_nvram = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS);
6059
6060 if (lec != ((b_nvram & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
6061 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS)) {
6062 /* NVRAM needs update */
6063 b_nvram &= ~(TP_NVRAM_MASK_LEVEL_BRIGHTNESS <<
6064 TP_NVRAM_POS_LEVEL_BRIGHTNESS);
6065 b_nvram |= lec;
6066 nvram_write_byte(b_nvram, TP_NVRAM_ADDR_BRIGHTNESS);
6067 dbg_printk(TPACPI_DBG_BRGHT,
6068 "updated NVRAM backlight level to %u (0x%02x)\n",
6069 (unsigned int) lec, (unsigned int) b_nvram);
6070 } else
6071 vdbg_printk(TPACPI_DBG_BRGHT,
6072 "NVRAM backlight level already is %u (0x%02x)\n",
6073 (unsigned int) lec, (unsigned int) b_nvram);
6074
6075 unlock:
6076 mutex_unlock(&brightness_mutex);
6077 }
6078
6079
6080 /* call with brightness_mutex held! */
6081 static int tpacpi_brightness_get_raw(int *status)
6082 {
6083 u8 lec = 0;
6084
6085 switch (brightness_mode) {
6086 case TPACPI_BRGHT_MODE_UCMS_STEP:
6087 *status = tpacpi_brightness_nvram_get();
6088 return 0;
6089 case TPACPI_BRGHT_MODE_EC:
6090 case TPACPI_BRGHT_MODE_ECNVRAM:
6091 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
6092 return -EIO;
6093 *status = lec;
6094 return 0;
6095 default:
6096 return -ENXIO;
6097 }
6098 }
6099
6100 /* call with brightness_mutex held! */
6101 /* do NOT call with illegal backlight level value */
6102 static int tpacpi_brightness_set_ec(unsigned int value)
6103 {
6104 u8 lec = 0;
6105
6106 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
6107 return -EIO;
6108
6109 if (unlikely(!acpi_ec_write(TP_EC_BACKLIGHT,
6110 (lec & TP_EC_BACKLIGHT_CMDMSK) |
6111 (value & TP_EC_BACKLIGHT_LVLMSK))))
6112 return -EIO;
6113
6114 return 0;
6115 }
6116
6117 /* call with brightness_mutex held! */
6118 static int tpacpi_brightness_set_ucmsstep(unsigned int value)
6119 {
6120 int cmos_cmd, inc;
6121 unsigned int current_value, i;
6122
6123 current_value = tpacpi_brightness_nvram_get();
6124
6125 if (value == current_value)
6126 return 0;
6127
6128 cmos_cmd = (value > current_value) ?
6129 TP_CMOS_BRIGHTNESS_UP :
6130 TP_CMOS_BRIGHTNESS_DOWN;
6131 inc = (value > current_value) ? 1 : -1;
6132
6133 for (i = current_value; i != value; i += inc)
6134 if (issue_thinkpad_cmos_command(cmos_cmd))
6135 return -EIO;
6136
6137 return 0;
6138 }
6139
6140 /* May return EINTR which can always be mapped to ERESTARTSYS */
6141 static int brightness_set(unsigned int value)
6142 {
6143 int res;
6144
6145 if (value > bright_maxlvl)
6146 return -EINVAL;
6147
6148 vdbg_printk(TPACPI_DBG_BRGHT,
6149 "set backlight level to %d\n", value);
6150
6151 res = mutex_lock_killable(&brightness_mutex);
6152 if (res < 0)
6153 return res;
6154
6155 switch (brightness_mode) {
6156 case TPACPI_BRGHT_MODE_EC:
6157 case TPACPI_BRGHT_MODE_ECNVRAM:
6158 res = tpacpi_brightness_set_ec(value);
6159 break;
6160 case TPACPI_BRGHT_MODE_UCMS_STEP:
6161 res = tpacpi_brightness_set_ucmsstep(value);
6162 break;
6163 default:
6164 res = -ENXIO;
6165 }
6166
6167 mutex_unlock(&brightness_mutex);
6168 return res;
6169 }
6170
6171 /* sysfs backlight class ----------------------------------------------- */
6172
6173 static int brightness_update_status(struct backlight_device *bd)
6174 {
6175 unsigned int level =
6176 (bd->props.fb_blank == FB_BLANK_UNBLANK &&
6177 bd->props.power == FB_BLANK_UNBLANK) ?
6178 bd->props.brightness : 0;
6179
6180 dbg_printk(TPACPI_DBG_BRGHT,
6181 "backlight: attempt to set level to %d\n",
6182 level);
6183
6184 /* it is the backlight class's job (caller) to handle
6185 * EINTR and other errors properly */
6186 return brightness_set(level);
6187 }
6188
6189 static int brightness_get(struct backlight_device *bd)
6190 {
6191 int status, res;
6192
6193 res = mutex_lock_killable(&brightness_mutex);
6194 if (res < 0)
6195 return 0;
6196
6197 res = tpacpi_brightness_get_raw(&status);
6198
6199 mutex_unlock(&brightness_mutex);
6200
6201 if (res < 0)
6202 return 0;
6203
6204 return status & TP_EC_BACKLIGHT_LVLMSK;
6205 }
6206
6207 static void tpacpi_brightness_notify_change(void)
6208 {
6209 backlight_force_update(ibm_backlight_device,
6210 BACKLIGHT_UPDATE_HOTKEY);
6211 }
6212
6213 static const struct backlight_ops ibm_backlight_data = {
6214 .get_brightness = brightness_get,
6215 .update_status = brightness_update_status,
6216 };
6217
6218 /* --------------------------------------------------------------------- */
6219
6220 /*
6221 * Call _BCL method of video device. On some ThinkPads this will
6222 * switch the firmware to the ACPI brightness control mode.
6223 */
6224
6225 static int __init tpacpi_query_bcl_levels(acpi_handle handle)
6226 {
6227 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
6228 union acpi_object *obj;
6229 struct acpi_device *device, *child;
6230 int rc;
6231
6232 if (acpi_bus_get_device(handle, &device))
6233 return 0;
6234
6235 rc = 0;
6236 list_for_each_entry(child, &device->children, node) {
6237 acpi_status status = acpi_evaluate_object(child->handle, "_BCL",
6238 NULL, &buffer);
6239 if (ACPI_FAILURE(status))
6240 continue;
6241
6242 obj = (union acpi_object *)buffer.pointer;
6243 if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) {
6244 pr_err("Unknown _BCL data, please report this to %s\n",
6245 TPACPI_MAIL);
6246 rc = 0;
6247 } else {
6248 rc = obj->package.count;
6249 }
6250 break;
6251 }
6252
6253 kfree(buffer.pointer);
6254 return rc;
6255 }
6256
6257
6258 /*
6259 * Returns 0 (no ACPI _BCL or _BCL invalid), or size of brightness map
6260 */
6261 static unsigned int __init tpacpi_check_std_acpi_brightness_support(void)
6262 {
6263 acpi_handle video_device;
6264 int bcl_levels = 0;
6265
6266 tpacpi_acpi_handle_locate("video", NULL, &video_device);
6267 if (video_device)
6268 bcl_levels = tpacpi_query_bcl_levels(video_device);
6269
6270 tp_features.bright_acpimode = (bcl_levels > 0);
6271
6272 return (bcl_levels > 2) ? (bcl_levels - 2) : 0;
6273 }
6274
6275 /*
6276 * These are only useful for models that have only one possibility
6277 * of GPU. If the BIOS model handles both ATI and Intel, don't use
6278 * these quirks.
6279 */
6280 #define TPACPI_BRGHT_Q_NOEC 0x0001 /* Must NOT use EC HBRV */
6281 #define TPACPI_BRGHT_Q_EC 0x0002 /* Should or must use EC HBRV */
6282 #define TPACPI_BRGHT_Q_ASK 0x8000 /* Ask for user report */
6283
6284 static const struct tpacpi_quirk brightness_quirk_table[] __initconst = {
6285 /* Models with ATI GPUs known to require ECNVRAM mode */
6286 TPACPI_Q_IBM('1', 'Y', TPACPI_BRGHT_Q_EC), /* T43/p ATI */
6287
6288 /* Models with ATI GPUs that can use ECNVRAM */
6289 TPACPI_Q_IBM('1', 'R', TPACPI_BRGHT_Q_EC), /* R50,51 T40-42 */
6290 TPACPI_Q_IBM('1', 'Q', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
6291 TPACPI_Q_IBM('7', '6', TPACPI_BRGHT_Q_EC), /* R52 */
6292 TPACPI_Q_IBM('7', '8', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
6293
6294 /* Models with Intel Extreme Graphics 2 */
6295 TPACPI_Q_IBM('1', 'U', TPACPI_BRGHT_Q_NOEC), /* X40 */
6296 TPACPI_Q_IBM('1', 'V', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
6297 TPACPI_Q_IBM('1', 'W', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
6298
6299 /* Models with Intel GMA900 */
6300 TPACPI_Q_IBM('7', '0', TPACPI_BRGHT_Q_NOEC), /* T43, R52 */
6301 TPACPI_Q_IBM('7', '4', TPACPI_BRGHT_Q_NOEC), /* X41 */
6302 TPACPI_Q_IBM('7', '5', TPACPI_BRGHT_Q_NOEC), /* X41 Tablet */
6303 };
6304
6305 /*
6306 * Returns < 0 for error, otherwise sets tp_features.bright_*
6307 * and bright_maxlvl.
6308 */
6309 static void __init tpacpi_detect_brightness_capabilities(void)
6310 {
6311 unsigned int b;
6312
6313 vdbg_printk(TPACPI_DBG_INIT,
6314 "detecting firmware brightness interface capabilities\n");
6315
6316 /* we could run a quirks check here (same table used by
6317 * brightness_init) if needed */
6318
6319 /*
6320 * We always attempt to detect acpi support, so as to switch
6321 * Lenovo Vista BIOS to ACPI brightness mode even if we are not
6322 * going to publish a backlight interface
6323 */
6324 b = tpacpi_check_std_acpi_brightness_support();
6325 switch (b) {
6326 case 16:
6327 bright_maxlvl = 15;
6328 pr_info("detected a 16-level brightness capable ThinkPad\n");
6329 break;
6330 case 8:
6331 case 0:
6332 bright_maxlvl = 7;
6333 pr_info("detected a 8-level brightness capable ThinkPad\n");
6334 break;
6335 default:
6336 pr_err("Unsupported brightness interface, "
6337 "please contact %s\n", TPACPI_MAIL);
6338 tp_features.bright_unkfw = 1;
6339 bright_maxlvl = b - 1;
6340 }
6341 }
6342
6343 static int __init brightness_init(struct ibm_init_struct *iibm)
6344 {
6345 struct backlight_properties props;
6346 int b;
6347 unsigned long quirks;
6348
6349 vdbg_printk(TPACPI_DBG_INIT, "initializing brightness subdriver\n");
6350
6351 mutex_init(&brightness_mutex);
6352
6353 quirks = tpacpi_check_quirks(brightness_quirk_table,
6354 ARRAY_SIZE(brightness_quirk_table));
6355
6356 /* tpacpi_detect_brightness_capabilities() must have run already */
6357
6358 /* if it is unknown, we don't handle it: it wouldn't be safe */
6359 if (tp_features.bright_unkfw)
6360 return 1;
6361
6362 if (!brightness_enable) {
6363 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT,
6364 "brightness support disabled by "
6365 "module parameter\n");
6366 return 1;
6367 }
6368
6369 if (acpi_video_backlight_support()) {
6370 if (brightness_enable > 1) {
6371 pr_info("Standard ACPI backlight interface "
6372 "available, not loading native one\n");
6373 return 1;
6374 } else if (brightness_enable == 1) {
6375 pr_warn("Cannot enable backlight brightness support, "
6376 "ACPI is already handling it. Refer to the "
6377 "acpi_backlight kernel parameter.\n");
6378 return 1;
6379 }
6380 } else if (tp_features.bright_acpimode && brightness_enable > 1) {
6381 pr_notice("Standard ACPI backlight interface not "
6382 "available, thinkpad_acpi native "
6383 "brightness control enabled\n");
6384 }
6385
6386 /*
6387 * Check for module parameter bogosity, note that we
6388 * init brightness_mode to TPACPI_BRGHT_MODE_MAX in order to be
6389 * able to detect "unspecified"
6390 */
6391 if (brightness_mode > TPACPI_BRGHT_MODE_MAX)
6392 return -EINVAL;
6393
6394 /* TPACPI_BRGHT_MODE_AUTO not implemented yet, just use default */
6395 if (brightness_mode == TPACPI_BRGHT_MODE_AUTO ||
6396 brightness_mode == TPACPI_BRGHT_MODE_MAX) {
6397 if (quirks & TPACPI_BRGHT_Q_EC)
6398 brightness_mode = TPACPI_BRGHT_MODE_ECNVRAM;
6399 else
6400 brightness_mode = TPACPI_BRGHT_MODE_UCMS_STEP;
6401
6402 dbg_printk(TPACPI_DBG_BRGHT,
6403 "driver auto-selected brightness_mode=%d\n",
6404 brightness_mode);
6405 }
6406
6407 /* Safety */
6408 if (!tpacpi_is_ibm() &&
6409 (brightness_mode == TPACPI_BRGHT_MODE_ECNVRAM ||
6410 brightness_mode == TPACPI_BRGHT_MODE_EC))
6411 return -EINVAL;
6412
6413 if (tpacpi_brightness_get_raw(&b) < 0)
6414 return 1;
6415
6416 memset(&props, 0, sizeof(struct backlight_properties));
6417 props.type = BACKLIGHT_PLATFORM;
6418 props.max_brightness = bright_maxlvl;
6419 props.brightness = b & TP_EC_BACKLIGHT_LVLMSK;
6420 ibm_backlight_device = backlight_device_register(TPACPI_BACKLIGHT_DEV_NAME,
6421 NULL, NULL,
6422 &ibm_backlight_data,
6423 &props);
6424 if (IS_ERR(ibm_backlight_device)) {
6425 int rc = PTR_ERR(ibm_backlight_device);
6426 ibm_backlight_device = NULL;
6427 pr_err("Could not register backlight device\n");
6428 return rc;
6429 }
6430 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT,
6431 "brightness is supported\n");
6432
6433 if (quirks & TPACPI_BRGHT_Q_ASK) {
6434 pr_notice("brightness: will use unverified default: "
6435 "brightness_mode=%d\n", brightness_mode);
6436 pr_notice("brightness: please report to %s whether it works well "
6437 "or not on your ThinkPad\n", TPACPI_MAIL);
6438 }
6439
6440 /* Added by mistake in early 2007. Probably useless, but it could
6441 * be working around some unknown firmware problem where the value
6442 * read at startup doesn't match the real hardware state... so leave
6443 * it in place just in case */
6444 backlight_update_status(ibm_backlight_device);
6445
6446 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT,
6447 "brightness: registering brightness hotkeys "
6448 "as change notification\n");
6449 tpacpi_hotkey_driver_mask_set(hotkey_driver_mask
6450 | TP_ACPI_HKEY_BRGHTUP_MASK
6451 | TP_ACPI_HKEY_BRGHTDWN_MASK);
6452 return 0;
6453 }
6454
6455 static void brightness_suspend(void)
6456 {
6457 tpacpi_brightness_checkpoint_nvram();
6458 }
6459
6460 static void brightness_shutdown(void)
6461 {
6462 tpacpi_brightness_checkpoint_nvram();
6463 }
6464
6465 static void brightness_exit(void)
6466 {
6467 if (ibm_backlight_device) {
6468 vdbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_BRGHT,
6469 "calling backlight_device_unregister()\n");
6470 backlight_device_unregister(ibm_backlight_device);
6471 }
6472
6473 tpacpi_brightness_checkpoint_nvram();
6474 }
6475
6476 static int brightness_read(struct seq_file *m)
6477 {
6478 int level;
6479
6480 level = brightness_get(NULL);
6481 if (level < 0) {
6482 seq_printf(m, "level:\t\tunreadable\n");
6483 } else {
6484 seq_printf(m, "level:\t\t%d\n", level);
6485 seq_printf(m, "commands:\tup, down\n");
6486 seq_printf(m, "commands:\tlevel <level> (<level> is 0-%d)\n",
6487 bright_maxlvl);
6488 }
6489
6490 return 0;
6491 }
6492
6493 static int brightness_write(char *buf)
6494 {
6495 int level;
6496 int rc;
6497 char *cmd;
6498
6499 level = brightness_get(NULL);
6500 if (level < 0)
6501 return level;
6502
6503 while ((cmd = next_cmd(&buf))) {
6504 if (strlencmp(cmd, "up") == 0) {
6505 if (level < bright_maxlvl)
6506 level++;
6507 } else if (strlencmp(cmd, "down") == 0) {
6508 if (level > 0)
6509 level--;
6510 } else if (sscanf(cmd, "level %d", &level) == 1 &&
6511 level >= 0 && level <= bright_maxlvl) {
6512 /* new level set */
6513 } else
6514 return -EINVAL;
6515 }
6516
6517 tpacpi_disclose_usertask("procfs brightness",
6518 "set level to %d\n", level);
6519
6520 /*
6521 * Now we know what the final level should be, so we try to set it.
6522 * Doing it this way makes the syscall restartable in case of EINTR
6523 */
6524 rc = brightness_set(level);
6525 if (!rc && ibm_backlight_device)
6526 backlight_force_update(ibm_backlight_device,
6527 BACKLIGHT_UPDATE_SYSFS);
6528 return (rc == -EINTR) ? -ERESTARTSYS : rc;
6529 }
6530
6531 static struct ibm_struct brightness_driver_data = {
6532 .name = "brightness",
6533 .read = brightness_read,
6534 .write = brightness_write,
6535 .exit = brightness_exit,
6536 .suspend = brightness_suspend,
6537 .shutdown = brightness_shutdown,
6538 };
6539
6540 /*************************************************************************
6541 * Volume subdriver
6542 */
6543
6544 /*
6545 * IBM ThinkPads have a simple volume controller with MUTE gating.
6546 * Very early Lenovo ThinkPads follow the IBM ThinkPad spec.
6547 *
6548 * Since the *61 series (and probably also the later *60 series), Lenovo
6549 * ThinkPads only implement the MUTE gate.
6550 *
6551 * EC register 0x30
6552 * Bit 6: MUTE (1 mutes sound)
6553 * Bit 3-0: Volume
6554 * Other bits should be zero as far as we know.
6555 *
6556 * This is also stored in CMOS NVRAM, byte 0x60, bit 6 (MUTE), and
6557 * bits 3-0 (volume). Other bits in NVRAM may have other functions,
6558 * such as bit 7 which is used to detect repeated presses of MUTE,
6559 * and we leave them unchanged.
6560 *
6561 * On newer Lenovo ThinkPads, the EC can automatically change the volume
6562 * in response to user input. Unfortunately, this rarely works well.
6563 * The laptop changes the state of its internal MUTE gate and, on some
6564 * models, sends KEY_MUTE, causing any user code that responds to the
6565 * mute button to get confused. The hardware MUTE gate is also
6566 * unnecessary, since user code can handle the mute button without
6567 * kernel or EC help.
6568 *
6569 * To avoid confusing userspace, we simply disable all EC-based mute
6570 * and volume controls when possible.
6571 */
6572
6573 #ifdef CONFIG_THINKPAD_ACPI_ALSA_SUPPORT
6574
6575 #define TPACPI_ALSA_DRVNAME "ThinkPad EC"
6576 #define TPACPI_ALSA_SHRTNAME "ThinkPad Console Audio Control"
6577 #define TPACPI_ALSA_MIXERNAME TPACPI_ALSA_SHRTNAME
6578
6579 #if SNDRV_CARDS <= 32
6580 #define DEFAULT_ALSA_IDX ~((1 << (SNDRV_CARDS - 3)) - 1)
6581 #else
6582 #define DEFAULT_ALSA_IDX ~((1 << (32 - 3)) - 1)
6583 #endif
6584 static int alsa_index = DEFAULT_ALSA_IDX; /* last three slots */
6585 static char *alsa_id = "ThinkPadEC";
6586 static bool alsa_enable = SNDRV_DEFAULT_ENABLE1;
6587
6588 struct tpacpi_alsa_data {
6589 struct snd_card *card;
6590 struct snd_ctl_elem_id *ctl_mute_id;
6591 struct snd_ctl_elem_id *ctl_vol_id;
6592 };
6593
6594 static struct snd_card *alsa_card;
6595
6596 enum {
6597 TP_EC_AUDIO = 0x30,
6598
6599 /* TP_EC_AUDIO bits */
6600 TP_EC_AUDIO_MUTESW = 6,
6601
6602 /* TP_EC_AUDIO bitmasks */
6603 TP_EC_AUDIO_LVL_MSK = 0x0F,
6604 TP_EC_AUDIO_MUTESW_MSK = (1 << TP_EC_AUDIO_MUTESW),
6605
6606 /* Maximum volume */
6607 TP_EC_VOLUME_MAX = 14,
6608 };
6609
6610 enum tpacpi_volume_access_mode {
6611 TPACPI_VOL_MODE_AUTO = 0, /* Not implemented yet */
6612 TPACPI_VOL_MODE_EC, /* Pure EC control */
6613 TPACPI_VOL_MODE_UCMS_STEP, /* UCMS step-based control: N/A */
6614 TPACPI_VOL_MODE_ECNVRAM, /* EC control w/ NVRAM store */
6615 TPACPI_VOL_MODE_MAX
6616 };
6617
6618 enum tpacpi_volume_capabilities {
6619 TPACPI_VOL_CAP_AUTO = 0, /* Use white/blacklist */
6620 TPACPI_VOL_CAP_VOLMUTE, /* Output vol and mute */
6621 TPACPI_VOL_CAP_MUTEONLY, /* Output mute only */
6622 TPACPI_VOL_CAP_MAX
6623 };
6624
6625 enum tpacpi_mute_btn_mode {
6626 TP_EC_MUTE_BTN_LATCH = 0, /* Mute mutes; up/down unmutes */
6627 /* We don't know what mode 1 is. */
6628 TP_EC_MUTE_BTN_NONE = 2, /* Mute and up/down are just keys */
6629 TP_EC_MUTE_BTN_TOGGLE = 3, /* Mute toggles; up/down unmutes */
6630 };
6631
6632 static enum tpacpi_volume_access_mode volume_mode =
6633 TPACPI_VOL_MODE_MAX;
6634
6635 static enum tpacpi_volume_capabilities volume_capabilities;
6636 static bool volume_control_allowed;
6637 static bool software_mute_requested = true;
6638 static bool software_mute_active;
6639 static int software_mute_orig_mode;
6640
6641 /*
6642 * Used to syncronize writers to TP_EC_AUDIO and
6643 * TP_NVRAM_ADDR_MIXER, as we need to do read-modify-write
6644 */
6645 static struct mutex volume_mutex;
6646
6647 static void tpacpi_volume_checkpoint_nvram(void)
6648 {
6649 u8 lec = 0;
6650 u8 b_nvram;
6651 u8 ec_mask;
6652
6653 if (volume_mode != TPACPI_VOL_MODE_ECNVRAM)
6654 return;
6655 if (!volume_control_allowed)
6656 return;
6657 if (software_mute_active)
6658 return;
6659
6660 vdbg_printk(TPACPI_DBG_MIXER,
6661 "trying to checkpoint mixer state to NVRAM...\n");
6662
6663 if (tp_features.mixer_no_level_control)
6664 ec_mask = TP_EC_AUDIO_MUTESW_MSK;
6665 else
6666 ec_mask = TP_EC_AUDIO_MUTESW_MSK | TP_EC_AUDIO_LVL_MSK;
6667
6668 if (mutex_lock_killable(&volume_mutex) < 0)
6669 return;
6670
6671 if (unlikely(!acpi_ec_read(TP_EC_AUDIO, &lec)))
6672 goto unlock;
6673 lec &= ec_mask;
6674 b_nvram = nvram_read_byte(TP_NVRAM_ADDR_MIXER);
6675
6676 if (lec != (b_nvram & ec_mask)) {
6677 /* NVRAM needs update */
6678 b_nvram &= ~ec_mask;
6679 b_nvram |= lec;
6680 nvram_write_byte(b_nvram, TP_NVRAM_ADDR_MIXER);
6681 dbg_printk(TPACPI_DBG_MIXER,
6682 "updated NVRAM mixer status to 0x%02x (0x%02x)\n",
6683 (unsigned int) lec, (unsigned int) b_nvram);
6684 } else {
6685 vdbg_printk(TPACPI_DBG_MIXER,
6686 "NVRAM mixer status already is 0x%02x (0x%02x)\n",
6687 (unsigned int) lec, (unsigned int) b_nvram);
6688 }
6689
6690 unlock:
6691 mutex_unlock(&volume_mutex);
6692 }
6693
6694 static int volume_get_status_ec(u8 *status)
6695 {
6696 u8 s;
6697
6698 if (!acpi_ec_read(TP_EC_AUDIO, &s))
6699 return -EIO;
6700
6701 *status = s;
6702
6703 dbg_printk(TPACPI_DBG_MIXER, "status 0x%02x\n", s);
6704
6705 return 0;
6706 }
6707
6708 static int volume_get_status(u8 *status)
6709 {
6710 return volume_get_status_ec(status);
6711 }
6712
6713 static int volume_set_status_ec(const u8 status)
6714 {
6715 if (!acpi_ec_write(TP_EC_AUDIO, status))
6716 return -EIO;
6717
6718 dbg_printk(TPACPI_DBG_MIXER, "set EC mixer to 0x%02x\n", status);
6719
6720 /*
6721 * On X200s, and possibly on others, it can take a while for
6722 * reads to become correct.
6723 */
6724 msleep(1);
6725
6726 return 0;
6727 }
6728
6729 static int volume_set_status(const u8 status)
6730 {
6731 return volume_set_status_ec(status);
6732 }
6733
6734 /* returns < 0 on error, 0 on no change, 1 on change */
6735 static int __volume_set_mute_ec(const bool mute)
6736 {
6737 int rc;
6738 u8 s, n;
6739
6740 if (mutex_lock_killable(&volume_mutex) < 0)
6741 return -EINTR;
6742
6743 rc = volume_get_status_ec(&s);
6744 if (rc)
6745 goto unlock;
6746
6747 n = (mute) ? s | TP_EC_AUDIO_MUTESW_MSK :
6748 s & ~TP_EC_AUDIO_MUTESW_MSK;
6749
6750 if (n != s) {
6751 rc = volume_set_status_ec(n);
6752 if (!rc)
6753 rc = 1;
6754 }
6755
6756 unlock:
6757 mutex_unlock(&volume_mutex);
6758 return rc;
6759 }
6760
6761 static int volume_alsa_set_mute(const bool mute)
6762 {
6763 dbg_printk(TPACPI_DBG_MIXER, "ALSA: trying to %smute\n",
6764 (mute) ? "" : "un");
6765 return __volume_set_mute_ec(mute);
6766 }
6767
6768 static int volume_set_mute(const bool mute)
6769 {
6770 int rc;
6771
6772 dbg_printk(TPACPI_DBG_MIXER, "trying to %smute\n",
6773 (mute) ? "" : "un");
6774
6775 rc = __volume_set_mute_ec(mute);
6776 return (rc < 0) ? rc : 0;
6777 }
6778
6779 /* returns < 0 on error, 0 on no change, 1 on change */
6780 static int __volume_set_volume_ec(const u8 vol)
6781 {
6782 int rc;
6783 u8 s, n;
6784
6785 if (vol > TP_EC_VOLUME_MAX)
6786 return -EINVAL;
6787
6788 if (mutex_lock_killable(&volume_mutex) < 0)
6789 return -EINTR;
6790
6791 rc = volume_get_status_ec(&s);
6792 if (rc)
6793 goto unlock;
6794
6795 n = (s & ~TP_EC_AUDIO_LVL_MSK) | vol;
6796
6797 if (n != s) {
6798 rc = volume_set_status_ec(n);
6799 if (!rc)
6800 rc = 1;
6801 }
6802
6803 unlock:
6804 mutex_unlock(&volume_mutex);
6805 return rc;
6806 }
6807
6808 static int volume_set_software_mute(bool startup)
6809 {
6810 int result;
6811
6812 if (!tpacpi_is_lenovo())
6813 return -ENODEV;
6814
6815 if (startup) {
6816 if (!acpi_evalf(ec_handle, &software_mute_orig_mode,
6817 "HAUM", "qd"))
6818 return -EIO;
6819
6820 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
6821 "Initial HAUM setting was %d\n",
6822 software_mute_orig_mode);
6823 }
6824
6825 if (!acpi_evalf(ec_handle, &result, "SAUM", "qdd",
6826 (int)TP_EC_MUTE_BTN_NONE))
6827 return -EIO;
6828
6829 if (result != TP_EC_MUTE_BTN_NONE)
6830 pr_warn("Unexpected SAUM result %d\n",
6831 result);
6832
6833 /*
6834 * In software mute mode, the standard codec controls take
6835 * precendence, so we unmute the ThinkPad HW switch at
6836 * startup. Just on case there are SAUM-capable ThinkPads
6837 * with level controls, set max HW volume as well.
6838 */
6839 if (tp_features.mixer_no_level_control)
6840 result = volume_set_mute(false);
6841 else
6842 result = volume_set_status(TP_EC_VOLUME_MAX);
6843
6844 if (result != 0)
6845 pr_warn("Failed to unmute the HW mute switch\n");
6846
6847 return 0;
6848 }
6849
6850 static void volume_exit_software_mute(void)
6851 {
6852 int r;
6853
6854 if (!acpi_evalf(ec_handle, &r, "SAUM", "qdd", software_mute_orig_mode)
6855 || r != software_mute_orig_mode)
6856 pr_warn("Failed to restore mute mode\n");
6857 }
6858
6859 static int volume_alsa_set_volume(const u8 vol)
6860 {
6861 dbg_printk(TPACPI_DBG_MIXER,
6862 "ALSA: trying to set volume level to %hu\n", vol);
6863 return __volume_set_volume_ec(vol);
6864 }
6865
6866 static void volume_alsa_notify_change(void)
6867 {
6868 struct tpacpi_alsa_data *d;
6869
6870 if (alsa_card && alsa_card->private_data) {
6871 d = alsa_card->private_data;
6872 if (d->ctl_mute_id)
6873 snd_ctl_notify(alsa_card,
6874 SNDRV_CTL_EVENT_MASK_VALUE,
6875 d->ctl_mute_id);
6876 if (d->ctl_vol_id)
6877 snd_ctl_notify(alsa_card,
6878 SNDRV_CTL_EVENT_MASK_VALUE,
6879 d->ctl_vol_id);
6880 }
6881 }
6882
6883 static int volume_alsa_vol_info(struct snd_kcontrol *kcontrol,
6884 struct snd_ctl_elem_info *uinfo)
6885 {
6886 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
6887 uinfo->count = 1;
6888 uinfo->value.integer.min = 0;
6889 uinfo->value.integer.max = TP_EC_VOLUME_MAX;
6890 return 0;
6891 }
6892
6893 static int volume_alsa_vol_get(struct snd_kcontrol *kcontrol,
6894 struct snd_ctl_elem_value *ucontrol)
6895 {
6896 u8 s;
6897 int rc;
6898
6899 rc = volume_get_status(&s);
6900 if (rc < 0)
6901 return rc;
6902
6903 ucontrol->value.integer.value[0] = s & TP_EC_AUDIO_LVL_MSK;
6904 return 0;
6905 }
6906
6907 static int volume_alsa_vol_put(struct snd_kcontrol *kcontrol,
6908 struct snd_ctl_elem_value *ucontrol)
6909 {
6910 tpacpi_disclose_usertask("ALSA", "set volume to %ld\n",
6911 ucontrol->value.integer.value[0]);
6912 return volume_alsa_set_volume(ucontrol->value.integer.value[0]);
6913 }
6914
6915 #define volume_alsa_mute_info snd_ctl_boolean_mono_info
6916
6917 static int volume_alsa_mute_get(struct snd_kcontrol *kcontrol,
6918 struct snd_ctl_elem_value *ucontrol)
6919 {
6920 u8 s;
6921 int rc;
6922
6923 rc = volume_get_status(&s);
6924 if (rc < 0)
6925 return rc;
6926
6927 ucontrol->value.integer.value[0] =
6928 (s & TP_EC_AUDIO_MUTESW_MSK) ? 0 : 1;
6929 return 0;
6930 }
6931
6932 static int volume_alsa_mute_put(struct snd_kcontrol *kcontrol,
6933 struct snd_ctl_elem_value *ucontrol)
6934 {
6935 tpacpi_disclose_usertask("ALSA", "%smute\n",
6936 ucontrol->value.integer.value[0] ?
6937 "un" : "");
6938 return volume_alsa_set_mute(!ucontrol->value.integer.value[0]);
6939 }
6940
6941 static struct snd_kcontrol_new volume_alsa_control_vol __initdata = {
6942 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
6943 .name = "Console Playback Volume",
6944 .index = 0,
6945 .access = SNDRV_CTL_ELEM_ACCESS_READ,
6946 .info = volume_alsa_vol_info,
6947 .get = volume_alsa_vol_get,
6948 };
6949
6950 static struct snd_kcontrol_new volume_alsa_control_mute __initdata = {
6951 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
6952 .name = "Console Playback Switch",
6953 .index = 0,
6954 .access = SNDRV_CTL_ELEM_ACCESS_READ,
6955 .info = volume_alsa_mute_info,
6956 .get = volume_alsa_mute_get,
6957 };
6958
6959 static void volume_suspend(void)
6960 {
6961 tpacpi_volume_checkpoint_nvram();
6962 }
6963
6964 static void volume_resume(void)
6965 {
6966 if (software_mute_active) {
6967 if (volume_set_software_mute(false) < 0)
6968 pr_warn("Failed to restore software mute\n");
6969 } else {
6970 volume_alsa_notify_change();
6971 }
6972 }
6973
6974 static void volume_shutdown(void)
6975 {
6976 tpacpi_volume_checkpoint_nvram();
6977 }
6978
6979 static void volume_exit(void)
6980 {
6981 if (alsa_card) {
6982 snd_card_free(alsa_card);
6983 alsa_card = NULL;
6984 }
6985
6986 tpacpi_volume_checkpoint_nvram();
6987
6988 if (software_mute_active)
6989 volume_exit_software_mute();
6990 }
6991
6992 static int __init volume_create_alsa_mixer(void)
6993 {
6994 struct snd_card *card;
6995 struct tpacpi_alsa_data *data;
6996 struct snd_kcontrol *ctl_vol;
6997 struct snd_kcontrol *ctl_mute;
6998 int rc;
6999
7000 rc = snd_card_new(&tpacpi_pdev->dev,
7001 alsa_index, alsa_id, THIS_MODULE,
7002 sizeof(struct tpacpi_alsa_data), &card);
7003 if (rc < 0 || !card) {
7004 pr_err("Failed to create ALSA card structures: %d\n", rc);
7005 return 1;
7006 }
7007
7008 BUG_ON(!card->private_data);
7009 data = card->private_data;
7010 data->card = card;
7011
7012 strlcpy(card->driver, TPACPI_ALSA_DRVNAME,
7013 sizeof(card->driver));
7014 strlcpy(card->shortname, TPACPI_ALSA_SHRTNAME,
7015 sizeof(card->shortname));
7016 snprintf(card->mixername, sizeof(card->mixername), "ThinkPad EC %s",
7017 (thinkpad_id.ec_version_str) ?
7018 thinkpad_id.ec_version_str : "(unknown)");
7019 snprintf(card->longname, sizeof(card->longname),
7020 "%s at EC reg 0x%02x, fw %s", card->shortname, TP_EC_AUDIO,
7021 (thinkpad_id.ec_version_str) ?
7022 thinkpad_id.ec_version_str : "unknown");
7023
7024 if (volume_control_allowed) {
7025 volume_alsa_control_vol.put = volume_alsa_vol_put;
7026 volume_alsa_control_vol.access =
7027 SNDRV_CTL_ELEM_ACCESS_READWRITE;
7028
7029 volume_alsa_control_mute.put = volume_alsa_mute_put;
7030 volume_alsa_control_mute.access =
7031 SNDRV_CTL_ELEM_ACCESS_READWRITE;
7032 }
7033
7034 if (!tp_features.mixer_no_level_control) {
7035 ctl_vol = snd_ctl_new1(&volume_alsa_control_vol, NULL);
7036 rc = snd_ctl_add(card, ctl_vol);
7037 if (rc < 0) {
7038 pr_err("Failed to create ALSA volume control: %d\n",
7039 rc);
7040 goto err_exit;
7041 }
7042 data->ctl_vol_id = &ctl_vol->id;
7043 }
7044
7045 ctl_mute = snd_ctl_new1(&volume_alsa_control_mute, NULL);
7046 rc = snd_ctl_add(card, ctl_mute);
7047 if (rc < 0) {
7048 pr_err("Failed to create ALSA mute control: %d\n", rc);
7049 goto err_exit;
7050 }
7051 data->ctl_mute_id = &ctl_mute->id;
7052
7053 rc = snd_card_register(card);
7054 if (rc < 0) {
7055 pr_err("Failed to register ALSA card: %d\n", rc);
7056 goto err_exit;
7057 }
7058
7059 alsa_card = card;
7060 return 0;
7061
7062 err_exit:
7063 snd_card_free(card);
7064 return 1;
7065 }
7066
7067 #define TPACPI_VOL_Q_MUTEONLY 0x0001 /* Mute-only control available */
7068 #define TPACPI_VOL_Q_LEVEL 0x0002 /* Volume control available */
7069
7070 static const struct tpacpi_quirk volume_quirk_table[] __initconst = {
7071 /* Whitelist volume level on all IBM by default */
7072 { .vendor = PCI_VENDOR_ID_IBM,
7073 .bios = TPACPI_MATCH_ANY,
7074 .ec = TPACPI_MATCH_ANY,
7075 .quirks = TPACPI_VOL_Q_LEVEL },
7076
7077 /* Lenovo models with volume control (needs confirmation) */
7078 TPACPI_QEC_LNV('7', 'C', TPACPI_VOL_Q_LEVEL), /* R60/i */
7079 TPACPI_QEC_LNV('7', 'E', TPACPI_VOL_Q_LEVEL), /* R60e/i */
7080 TPACPI_QEC_LNV('7', '9', TPACPI_VOL_Q_LEVEL), /* T60/p */
7081 TPACPI_QEC_LNV('7', 'B', TPACPI_VOL_Q_LEVEL), /* X60/s */
7082 TPACPI_QEC_LNV('7', 'J', TPACPI_VOL_Q_LEVEL), /* X60t */
7083 TPACPI_QEC_LNV('7', '7', TPACPI_VOL_Q_LEVEL), /* Z60 */
7084 TPACPI_QEC_LNV('7', 'F', TPACPI_VOL_Q_LEVEL), /* Z61 */
7085
7086 /* Whitelist mute-only on all Lenovo by default */
7087 { .vendor = PCI_VENDOR_ID_LENOVO,
7088 .bios = TPACPI_MATCH_ANY,
7089 .ec = TPACPI_MATCH_ANY,
7090 .quirks = TPACPI_VOL_Q_MUTEONLY }
7091 };
7092
7093 static int __init volume_init(struct ibm_init_struct *iibm)
7094 {
7095 unsigned long quirks;
7096 int rc;
7097
7098 vdbg_printk(TPACPI_DBG_INIT, "initializing volume subdriver\n");
7099
7100 mutex_init(&volume_mutex);
7101
7102 /*
7103 * Check for module parameter bogosity, note that we
7104 * init volume_mode to TPACPI_VOL_MODE_MAX in order to be
7105 * able to detect "unspecified"
7106 */
7107 if (volume_mode > TPACPI_VOL_MODE_MAX)
7108 return -EINVAL;
7109
7110 if (volume_mode == TPACPI_VOL_MODE_UCMS_STEP) {
7111 pr_err("UCMS step volume mode not implemented, "
7112 "please contact %s\n", TPACPI_MAIL);
7113 return 1;
7114 }
7115
7116 if (volume_capabilities >= TPACPI_VOL_CAP_MAX)
7117 return -EINVAL;
7118
7119 /*
7120 * The ALSA mixer is our primary interface.
7121 * When disabled, don't install the subdriver at all
7122 */
7123 if (!alsa_enable) {
7124 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
7125 "ALSA mixer disabled by parameter, "
7126 "not loading volume subdriver...\n");
7127 return 1;
7128 }
7129
7130 quirks = tpacpi_check_quirks(volume_quirk_table,
7131 ARRAY_SIZE(volume_quirk_table));
7132
7133 switch (volume_capabilities) {
7134 case TPACPI_VOL_CAP_AUTO:
7135 if (quirks & TPACPI_VOL_Q_MUTEONLY)
7136 tp_features.mixer_no_level_control = 1;
7137 else if (quirks & TPACPI_VOL_Q_LEVEL)
7138 tp_features.mixer_no_level_control = 0;
7139 else
7140 return 1; /* no mixer */
7141 break;
7142 case TPACPI_VOL_CAP_VOLMUTE:
7143 tp_features.mixer_no_level_control = 0;
7144 break;
7145 case TPACPI_VOL_CAP_MUTEONLY:
7146 tp_features.mixer_no_level_control = 1;
7147 break;
7148 default:
7149 return 1;
7150 }
7151
7152 if (volume_capabilities != TPACPI_VOL_CAP_AUTO)
7153 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
7154 "using user-supplied volume_capabilities=%d\n",
7155 volume_capabilities);
7156
7157 if (volume_mode == TPACPI_VOL_MODE_AUTO ||
7158 volume_mode == TPACPI_VOL_MODE_MAX) {
7159 volume_mode = TPACPI_VOL_MODE_ECNVRAM;
7160
7161 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
7162 "driver auto-selected volume_mode=%d\n",
7163 volume_mode);
7164 } else {
7165 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
7166 "using user-supplied volume_mode=%d\n",
7167 volume_mode);
7168 }
7169
7170 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
7171 "mute is supported, volume control is %s\n",
7172 str_supported(!tp_features.mixer_no_level_control));
7173
7174 if (software_mute_requested && volume_set_software_mute(true) == 0) {
7175 software_mute_active = true;
7176 } else {
7177 rc = volume_create_alsa_mixer();
7178 if (rc) {
7179 pr_err("Could not create the ALSA mixer interface\n");
7180 return rc;
7181 }
7182
7183 pr_info("Console audio control enabled, mode: %s\n",
7184 (volume_control_allowed) ?
7185 "override (read/write)" :
7186 "monitor (read only)");
7187 }
7188
7189 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
7190 "registering volume hotkeys as change notification\n");
7191 tpacpi_hotkey_driver_mask_set(hotkey_driver_mask
7192 | TP_ACPI_HKEY_VOLUP_MASK
7193 | TP_ACPI_HKEY_VOLDWN_MASK
7194 | TP_ACPI_HKEY_MUTE_MASK);
7195
7196 return 0;
7197 }
7198
7199 static int volume_read(struct seq_file *m)
7200 {
7201 u8 status;
7202
7203 if (volume_get_status(&status) < 0) {
7204 seq_printf(m, "level:\t\tunreadable\n");
7205 } else {
7206 if (tp_features.mixer_no_level_control)
7207 seq_printf(m, "level:\t\tunsupported\n");
7208 else
7209 seq_printf(m, "level:\t\t%d\n",
7210 status & TP_EC_AUDIO_LVL_MSK);
7211
7212 seq_printf(m, "mute:\t\t%s\n",
7213 onoff(status, TP_EC_AUDIO_MUTESW));
7214
7215 if (volume_control_allowed) {
7216 seq_printf(m, "commands:\tunmute, mute\n");
7217 if (!tp_features.mixer_no_level_control) {
7218 seq_printf(m,
7219 "commands:\tup, down\n");
7220 seq_printf(m,
7221 "commands:\tlevel <level>"
7222 " (<level> is 0-%d)\n",
7223 TP_EC_VOLUME_MAX);
7224 }
7225 }
7226 }
7227
7228 return 0;
7229 }
7230
7231 static int volume_write(char *buf)
7232 {
7233 u8 s;
7234 u8 new_level, new_mute;
7235 int l;
7236 char *cmd;
7237 int rc;
7238
7239 /*
7240 * We do allow volume control at driver startup, so that the
7241 * user can set initial state through the volume=... parameter hack.
7242 */
7243 if (!volume_control_allowed && tpacpi_lifecycle != TPACPI_LIFE_INIT) {
7244 if (unlikely(!tp_warned.volume_ctrl_forbidden)) {
7245 tp_warned.volume_ctrl_forbidden = 1;
7246 pr_notice("Console audio control in monitor mode, "
7247 "changes are not allowed\n");
7248 pr_notice("Use the volume_control=1 module parameter "
7249 "to enable volume control\n");
7250 }
7251 return -EPERM;
7252 }
7253
7254 rc = volume_get_status(&s);
7255 if (rc < 0)
7256 return rc;
7257
7258 new_level = s & TP_EC_AUDIO_LVL_MSK;
7259 new_mute = s & TP_EC_AUDIO_MUTESW_MSK;
7260
7261 while ((cmd = next_cmd(&buf))) {
7262 if (!tp_features.mixer_no_level_control) {
7263 if (strlencmp(cmd, "up") == 0) {
7264 if (new_mute)
7265 new_mute = 0;
7266 else if (new_level < TP_EC_VOLUME_MAX)
7267 new_level++;
7268 continue;
7269 } else if (strlencmp(cmd, "down") == 0) {
7270 if (new_mute)
7271 new_mute = 0;
7272 else if (new_level > 0)
7273 new_level--;
7274 continue;
7275 } else if (sscanf(cmd, "level %u", &l) == 1 &&
7276 l >= 0 && l <= TP_EC_VOLUME_MAX) {
7277 new_level = l;
7278 continue;
7279 }
7280 }
7281 if (strlencmp(cmd, "mute") == 0)
7282 new_mute = TP_EC_AUDIO_MUTESW_MSK;
7283 else if (strlencmp(cmd, "unmute") == 0)
7284 new_mute = 0;
7285 else
7286 return -EINVAL;
7287 }
7288
7289 if (tp_features.mixer_no_level_control) {
7290 tpacpi_disclose_usertask("procfs volume", "%smute\n",
7291 new_mute ? "" : "un");
7292 rc = volume_set_mute(!!new_mute);
7293 } else {
7294 tpacpi_disclose_usertask("procfs volume",
7295 "%smute and set level to %d\n",
7296 new_mute ? "" : "un", new_level);
7297 rc = volume_set_status(new_mute | new_level);
7298 }
7299 volume_alsa_notify_change();
7300
7301 return (rc == -EINTR) ? -ERESTARTSYS : rc;
7302 }
7303
7304 static struct ibm_struct volume_driver_data = {
7305 .name = "volume",
7306 .read = volume_read,
7307 .write = volume_write,
7308 .exit = volume_exit,
7309 .suspend = volume_suspend,
7310 .resume = volume_resume,
7311 .shutdown = volume_shutdown,
7312 };
7313
7314 #else /* !CONFIG_THINKPAD_ACPI_ALSA_SUPPORT */
7315
7316 #define alsa_card NULL
7317
7318 static void inline volume_alsa_notify_change(void)
7319 {
7320 }
7321
7322 static int __init volume_init(struct ibm_init_struct *iibm)
7323 {
7324 pr_info("volume: disabled as there is no ALSA support in this kernel\n");
7325
7326 return 1;
7327 }
7328
7329 static struct ibm_struct volume_driver_data = {
7330 .name = "volume",
7331 };
7332
7333 #endif /* CONFIG_THINKPAD_ACPI_ALSA_SUPPORT */
7334
7335 /*************************************************************************
7336 * Fan subdriver
7337 */
7338
7339 /*
7340 * FAN ACCESS MODES
7341 *
7342 * TPACPI_FAN_RD_ACPI_GFAN:
7343 * ACPI GFAN method: returns fan level
7344 *
7345 * see TPACPI_FAN_WR_ACPI_SFAN
7346 * EC 0x2f (HFSP) not available if GFAN exists
7347 *
7348 * TPACPI_FAN_WR_ACPI_SFAN:
7349 * ACPI SFAN method: sets fan level, 0 (stop) to 7 (max)
7350 *
7351 * EC 0x2f (HFSP) might be available *for reading*, but do not use
7352 * it for writing.
7353 *
7354 * TPACPI_FAN_WR_TPEC:
7355 * ThinkPad EC register 0x2f (HFSP): fan control loop mode
7356 * Supported on almost all ThinkPads
7357 *
7358 * Fan speed changes of any sort (including those caused by the
7359 * disengaged mode) are usually done slowly by the firmware as the
7360 * maximum amount of fan duty cycle change per second seems to be
7361 * limited.
7362 *
7363 * Reading is not available if GFAN exists.
7364 * Writing is not available if SFAN exists.
7365 *
7366 * Bits
7367 * 7 automatic mode engaged;
7368 * (default operation mode of the ThinkPad)
7369 * fan level is ignored in this mode.
7370 * 6 full speed mode (takes precedence over bit 7);
7371 * not available on all thinkpads. May disable
7372 * the tachometer while the fan controller ramps up
7373 * the speed (which can take up to a few *minutes*).
7374 * Speeds up fan to 100% duty-cycle, which is far above
7375 * the standard RPM levels. It is not impossible that
7376 * it could cause hardware damage.
7377 * 5-3 unused in some models. Extra bits for fan level
7378 * in others, but still useless as all values above
7379 * 7 map to the same speed as level 7 in these models.
7380 * 2-0 fan level (0..7 usually)
7381 * 0x00 = stop
7382 * 0x07 = max (set when temperatures critical)
7383 * Some ThinkPads may have other levels, see
7384 * TPACPI_FAN_WR_ACPI_FANS (X31/X40/X41)
7385 *
7386 * FIRMWARE BUG: on some models, EC 0x2f might not be initialized at
7387 * boot. Apparently the EC does not initialize it, so unless ACPI DSDT
7388 * does so, its initial value is meaningless (0x07).
7389 *
7390 * For firmware bugs, refer to:
7391 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
7392 *
7393 * ----
7394 *
7395 * ThinkPad EC register 0x84 (LSB), 0x85 (MSB):
7396 * Main fan tachometer reading (in RPM)
7397 *
7398 * This register is present on all ThinkPads with a new-style EC, and
7399 * it is known not to be present on the A21m/e, and T22, as there is
7400 * something else in offset 0x84 according to the ACPI DSDT. Other
7401 * ThinkPads from this same time period (and earlier) probably lack the
7402 * tachometer as well.
7403 *
7404 * Unfortunately a lot of ThinkPads with new-style ECs but whose firmware
7405 * was never fixed by IBM to report the EC firmware version string
7406 * probably support the tachometer (like the early X models), so
7407 * detecting it is quite hard. We need more data to know for sure.
7408 *
7409 * FIRMWARE BUG: always read 0x84 first, otherwise incorrect readings
7410 * might result.
7411 *
7412 * FIRMWARE BUG: may go stale while the EC is switching to full speed
7413 * mode.
7414 *
7415 * For firmware bugs, refer to:
7416 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
7417 *
7418 * ----
7419 *
7420 * ThinkPad EC register 0x31 bit 0 (only on select models)
7421 *
7422 * When bit 0 of EC register 0x31 is zero, the tachometer registers
7423 * show the speed of the main fan. When bit 0 of EC register 0x31
7424 * is one, the tachometer registers show the speed of the auxiliary
7425 * fan.
7426 *
7427 * Fan control seems to affect both fans, regardless of the state
7428 * of this bit.
7429 *
7430 * So far, only the firmware for the X60/X61 non-tablet versions
7431 * seem to support this (firmware TP-7M).
7432 *
7433 * TPACPI_FAN_WR_ACPI_FANS:
7434 * ThinkPad X31, X40, X41. Not available in the X60.
7435 *
7436 * FANS ACPI handle: takes three arguments: low speed, medium speed,
7437 * high speed. ACPI DSDT seems to map these three speeds to levels
7438 * as follows: STOP LOW LOW MED MED HIGH HIGH HIGH HIGH
7439 * (this map is stored on FAN0..FAN8 as "0,1,1,2,2,3,3,3,3")
7440 *
7441 * The speeds are stored on handles
7442 * (FANA:FAN9), (FANC:FANB), (FANE:FAND).
7443 *
7444 * There are three default speed sets, accessible as handles:
7445 * FS1L,FS1M,FS1H; FS2L,FS2M,FS2H; FS3L,FS3M,FS3H
7446 *
7447 * ACPI DSDT switches which set is in use depending on various
7448 * factors.
7449 *
7450 * TPACPI_FAN_WR_TPEC is also available and should be used to
7451 * command the fan. The X31/X40/X41 seems to have 8 fan levels,
7452 * but the ACPI tables just mention level 7.
7453 */
7454
7455 enum { /* Fan control constants */
7456 fan_status_offset = 0x2f, /* EC register 0x2f */
7457 fan_rpm_offset = 0x84, /* EC register 0x84: LSB, 0x85 MSB (RPM)
7458 * 0x84 must be read before 0x85 */
7459 fan_select_offset = 0x31, /* EC register 0x31 (Firmware 7M)
7460 bit 0 selects which fan is active */
7461
7462 TP_EC_FAN_FULLSPEED = 0x40, /* EC fan mode: full speed */
7463 TP_EC_FAN_AUTO = 0x80, /* EC fan mode: auto fan control */
7464
7465 TPACPI_FAN_LAST_LEVEL = 0x100, /* Use cached last-seen fan level */
7466 };
7467
7468 enum fan_status_access_mode {
7469 TPACPI_FAN_NONE = 0, /* No fan status or control */
7470 TPACPI_FAN_RD_ACPI_GFAN, /* Use ACPI GFAN */
7471 TPACPI_FAN_RD_TPEC, /* Use ACPI EC regs 0x2f, 0x84-0x85 */
7472 };
7473
7474 enum fan_control_access_mode {
7475 TPACPI_FAN_WR_NONE = 0, /* No fan control */
7476 TPACPI_FAN_WR_ACPI_SFAN, /* Use ACPI SFAN */
7477 TPACPI_FAN_WR_TPEC, /* Use ACPI EC reg 0x2f */
7478 TPACPI_FAN_WR_ACPI_FANS, /* Use ACPI FANS and EC reg 0x2f */
7479 };
7480
7481 enum fan_control_commands {
7482 TPACPI_FAN_CMD_SPEED = 0x0001, /* speed command */
7483 TPACPI_FAN_CMD_LEVEL = 0x0002, /* level command */
7484 TPACPI_FAN_CMD_ENABLE = 0x0004, /* enable/disable cmd,
7485 * and also watchdog cmd */
7486 };
7487
7488 static bool fan_control_allowed;
7489
7490 static enum fan_status_access_mode fan_status_access_mode;
7491 static enum fan_control_access_mode fan_control_access_mode;
7492 static enum fan_control_commands fan_control_commands;
7493
7494 static u8 fan_control_initial_status;
7495 static u8 fan_control_desired_level;
7496 static u8 fan_control_resume_level;
7497 static int fan_watchdog_maxinterval;
7498
7499 static struct mutex fan_mutex;
7500
7501 static void fan_watchdog_fire(struct work_struct *ignored);
7502 static DECLARE_DELAYED_WORK(fan_watchdog_task, fan_watchdog_fire);
7503
7504 TPACPI_HANDLE(fans, ec, "FANS"); /* X31, X40, X41 */
7505 TPACPI_HANDLE(gfan, ec, "GFAN", /* 570 */
7506 "\\FSPD", /* 600e/x, 770e, 770x */
7507 ); /* all others */
7508 TPACPI_HANDLE(sfan, ec, "SFAN", /* 570 */
7509 "JFNS", /* 770x-JL */
7510 ); /* all others */
7511
7512 /*
7513 * Unitialized HFSP quirk: ACPI DSDT and EC fail to initialize the
7514 * HFSP register at boot, so it contains 0x07 but the Thinkpad could
7515 * be in auto mode (0x80).
7516 *
7517 * This is corrected by any write to HFSP either by the driver, or
7518 * by the firmware.
7519 *
7520 * We assume 0x07 really means auto mode while this quirk is active,
7521 * as this is far more likely than the ThinkPad being in level 7,
7522 * which is only used by the firmware during thermal emergencies.
7523 *
7524 * Enable for TP-1Y (T43), TP-78 (R51e), TP-76 (R52),
7525 * TP-70 (T43, R52), which are known to be buggy.
7526 */
7527
7528 static void fan_quirk1_setup(void)
7529 {
7530 if (fan_control_initial_status == 0x07) {
7531 pr_notice("fan_init: initial fan status is unknown, "
7532 "assuming it is in auto mode\n");
7533 tp_features.fan_ctrl_status_undef = 1;
7534 }
7535 }
7536
7537 static void fan_quirk1_handle(u8 *fan_status)
7538 {
7539 if (unlikely(tp_features.fan_ctrl_status_undef)) {
7540 if (*fan_status != fan_control_initial_status) {
7541 /* something changed the HFSP regisnter since
7542 * driver init time, so it is not undefined
7543 * anymore */
7544 tp_features.fan_ctrl_status_undef = 0;
7545 } else {
7546 /* Return most likely status. In fact, it
7547 * might be the only possible status */
7548 *fan_status = TP_EC_FAN_AUTO;
7549 }
7550 }
7551 }
7552
7553 /* Select main fan on X60/X61, NOOP on others */
7554 static bool fan_select_fan1(void)
7555 {
7556 if (tp_features.second_fan) {
7557 u8 val;
7558
7559 if (ec_read(fan_select_offset, &val) < 0)
7560 return false;
7561 val &= 0xFEU;
7562 if (ec_write(fan_select_offset, val) < 0)
7563 return false;
7564 }
7565 return true;
7566 }
7567
7568 /* Select secondary fan on X60/X61 */
7569 static bool fan_select_fan2(void)
7570 {
7571 u8 val;
7572
7573 if (!tp_features.second_fan)
7574 return false;
7575
7576 if (ec_read(fan_select_offset, &val) < 0)
7577 return false;
7578 val |= 0x01U;
7579 if (ec_write(fan_select_offset, val) < 0)
7580 return false;
7581
7582 return true;
7583 }
7584
7585 /*
7586 * Call with fan_mutex held
7587 */
7588 static void fan_update_desired_level(u8 status)
7589 {
7590 if ((status &
7591 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
7592 if (status > 7)
7593 fan_control_desired_level = 7;
7594 else
7595 fan_control_desired_level = status;
7596 }
7597 }
7598
7599 static int fan_get_status(u8 *status)
7600 {
7601 u8 s;
7602
7603 /* TODO:
7604 * Add TPACPI_FAN_RD_ACPI_FANS ? */
7605
7606 switch (fan_status_access_mode) {
7607 case TPACPI_FAN_RD_ACPI_GFAN: {
7608 /* 570, 600e/x, 770e, 770x */
7609 int res;
7610
7611 if (unlikely(!acpi_evalf(gfan_handle, &res, NULL, "d")))
7612 return -EIO;
7613
7614 if (likely(status))
7615 *status = res & 0x07;
7616
7617 break;
7618 }
7619 case TPACPI_FAN_RD_TPEC:
7620 /* all except 570, 600e/x, 770e, 770x */
7621 if (unlikely(!acpi_ec_read(fan_status_offset, &s)))
7622 return -EIO;
7623
7624 if (likely(status)) {
7625 *status = s;
7626 fan_quirk1_handle(status);
7627 }
7628
7629 break;
7630
7631 default:
7632 return -ENXIO;
7633 }
7634
7635 return 0;
7636 }
7637
7638 static int fan_get_status_safe(u8 *status)
7639 {
7640 int rc;
7641 u8 s;
7642
7643 if (mutex_lock_killable(&fan_mutex))
7644 return -ERESTARTSYS;
7645 rc = fan_get_status(&s);
7646 if (!rc)
7647 fan_update_desired_level(s);
7648 mutex_unlock(&fan_mutex);
7649
7650 if (status)
7651 *status = s;
7652
7653 return rc;
7654 }
7655
7656 static int fan_get_speed(unsigned int *speed)
7657 {
7658 u8 hi, lo;
7659
7660 switch (fan_status_access_mode) {
7661 case TPACPI_FAN_RD_TPEC:
7662 /* all except 570, 600e/x, 770e, 770x */
7663 if (unlikely(!fan_select_fan1()))
7664 return -EIO;
7665 if (unlikely(!acpi_ec_read(fan_rpm_offset, &lo) ||
7666 !acpi_ec_read(fan_rpm_offset + 1, &hi)))
7667 return -EIO;
7668
7669 if (likely(speed))
7670 *speed = (hi << 8) | lo;
7671
7672 break;
7673
7674 default:
7675 return -ENXIO;
7676 }
7677
7678 return 0;
7679 }
7680
7681 static int fan2_get_speed(unsigned int *speed)
7682 {
7683 u8 hi, lo;
7684 bool rc;
7685
7686 switch (fan_status_access_mode) {
7687 case TPACPI_FAN_RD_TPEC:
7688 /* all except 570, 600e/x, 770e, 770x */
7689 if (unlikely(!fan_select_fan2()))
7690 return -EIO;
7691 rc = !acpi_ec_read(fan_rpm_offset, &lo) ||
7692 !acpi_ec_read(fan_rpm_offset + 1, &hi);
7693 fan_select_fan1(); /* play it safe */
7694 if (rc)
7695 return -EIO;
7696
7697 if (likely(speed))
7698 *speed = (hi << 8) | lo;
7699
7700 break;
7701
7702 default:
7703 return -ENXIO;
7704 }
7705
7706 return 0;
7707 }
7708
7709 static int fan_set_level(int level)
7710 {
7711 if (!fan_control_allowed)
7712 return -EPERM;
7713
7714 switch (fan_control_access_mode) {
7715 case TPACPI_FAN_WR_ACPI_SFAN:
7716 if (level >= 0 && level <= 7) {
7717 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", level))
7718 return -EIO;
7719 } else
7720 return -EINVAL;
7721 break;
7722
7723 case TPACPI_FAN_WR_ACPI_FANS:
7724 case TPACPI_FAN_WR_TPEC:
7725 if (!(level & TP_EC_FAN_AUTO) &&
7726 !(level & TP_EC_FAN_FULLSPEED) &&
7727 ((level < 0) || (level > 7)))
7728 return -EINVAL;
7729
7730 /* safety net should the EC not support AUTO
7731 * or FULLSPEED mode bits and just ignore them */
7732 if (level & TP_EC_FAN_FULLSPEED)
7733 level |= 7; /* safety min speed 7 */
7734 else if (level & TP_EC_FAN_AUTO)
7735 level |= 4; /* safety min speed 4 */
7736
7737 if (!acpi_ec_write(fan_status_offset, level))
7738 return -EIO;
7739 else
7740 tp_features.fan_ctrl_status_undef = 0;
7741 break;
7742
7743 default:
7744 return -ENXIO;
7745 }
7746
7747 vdbg_printk(TPACPI_DBG_FAN,
7748 "fan control: set fan control register to 0x%02x\n", level);
7749 return 0;
7750 }
7751
7752 static int fan_set_level_safe(int level)
7753 {
7754 int rc;
7755
7756 if (!fan_control_allowed)
7757 return -EPERM;
7758
7759 if (mutex_lock_killable(&fan_mutex))
7760 return -ERESTARTSYS;
7761
7762 if (level == TPACPI_FAN_LAST_LEVEL)
7763 level = fan_control_desired_level;
7764
7765 rc = fan_set_level(level);
7766 if (!rc)
7767 fan_update_desired_level(level);
7768
7769 mutex_unlock(&fan_mutex);
7770 return rc;
7771 }
7772
7773 static int fan_set_enable(void)
7774 {
7775 u8 s;
7776 int rc;
7777
7778 if (!fan_control_allowed)
7779 return -EPERM;
7780
7781 if (mutex_lock_killable(&fan_mutex))
7782 return -ERESTARTSYS;
7783
7784 switch (fan_control_access_mode) {
7785 case TPACPI_FAN_WR_ACPI_FANS:
7786 case TPACPI_FAN_WR_TPEC:
7787 rc = fan_get_status(&s);
7788 if (rc < 0)
7789 break;
7790
7791 /* Don't go out of emergency fan mode */
7792 if (s != 7) {
7793 s &= 0x07;
7794 s |= TP_EC_FAN_AUTO | 4; /* min fan speed 4 */
7795 }
7796
7797 if (!acpi_ec_write(fan_status_offset, s))
7798 rc = -EIO;
7799 else {
7800 tp_features.fan_ctrl_status_undef = 0;
7801 rc = 0;
7802 }
7803 break;
7804
7805 case TPACPI_FAN_WR_ACPI_SFAN:
7806 rc = fan_get_status(&s);
7807 if (rc < 0)
7808 break;
7809
7810 s &= 0x07;
7811
7812 /* Set fan to at least level 4 */
7813 s |= 4;
7814
7815 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", s))
7816 rc = -EIO;
7817 else
7818 rc = 0;
7819 break;
7820
7821 default:
7822 rc = -ENXIO;
7823 }
7824
7825 mutex_unlock(&fan_mutex);
7826
7827 if (!rc)
7828 vdbg_printk(TPACPI_DBG_FAN,
7829 "fan control: set fan control register to 0x%02x\n",
7830 s);
7831 return rc;
7832 }
7833
7834 static int fan_set_disable(void)
7835 {
7836 int rc;
7837
7838 if (!fan_control_allowed)
7839 return -EPERM;
7840
7841 if (mutex_lock_killable(&fan_mutex))
7842 return -ERESTARTSYS;
7843
7844 rc = 0;
7845 switch (fan_control_access_mode) {
7846 case TPACPI_FAN_WR_ACPI_FANS:
7847 case TPACPI_FAN_WR_TPEC:
7848 if (!acpi_ec_write(fan_status_offset, 0x00))
7849 rc = -EIO;
7850 else {
7851 fan_control_desired_level = 0;
7852 tp_features.fan_ctrl_status_undef = 0;
7853 }
7854 break;
7855
7856 case TPACPI_FAN_WR_ACPI_SFAN:
7857 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", 0x00))
7858 rc = -EIO;
7859 else
7860 fan_control_desired_level = 0;
7861 break;
7862
7863 default:
7864 rc = -ENXIO;
7865 }
7866
7867 if (!rc)
7868 vdbg_printk(TPACPI_DBG_FAN,
7869 "fan control: set fan control register to 0\n");
7870
7871 mutex_unlock(&fan_mutex);
7872 return rc;
7873 }
7874
7875 static int fan_set_speed(int speed)
7876 {
7877 int rc;
7878
7879 if (!fan_control_allowed)
7880 return -EPERM;
7881
7882 if (mutex_lock_killable(&fan_mutex))
7883 return -ERESTARTSYS;
7884
7885 rc = 0;
7886 switch (fan_control_access_mode) {
7887 case TPACPI_FAN_WR_ACPI_FANS:
7888 if (speed >= 0 && speed <= 65535) {
7889 if (!acpi_evalf(fans_handle, NULL, NULL, "vddd",
7890 speed, speed, speed))
7891 rc = -EIO;
7892 } else
7893 rc = -EINVAL;
7894 break;
7895
7896 default:
7897 rc = -ENXIO;
7898 }
7899
7900 mutex_unlock(&fan_mutex);
7901 return rc;
7902 }
7903
7904 static void fan_watchdog_reset(void)
7905 {
7906 if (fan_control_access_mode == TPACPI_FAN_WR_NONE)
7907 return;
7908
7909 if (fan_watchdog_maxinterval > 0 &&
7910 tpacpi_lifecycle != TPACPI_LIFE_EXITING)
7911 mod_delayed_work(tpacpi_wq, &fan_watchdog_task,
7912 msecs_to_jiffies(fan_watchdog_maxinterval * 1000));
7913 else
7914 cancel_delayed_work(&fan_watchdog_task);
7915 }
7916
7917 static void fan_watchdog_fire(struct work_struct *ignored)
7918 {
7919 int rc;
7920
7921 if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
7922 return;
7923
7924 pr_notice("fan watchdog: enabling fan\n");
7925 rc = fan_set_enable();
7926 if (rc < 0) {
7927 pr_err("fan watchdog: error %d while enabling fan, "
7928 "will try again later...\n", -rc);
7929 /* reschedule for later */
7930 fan_watchdog_reset();
7931 }
7932 }
7933
7934 /*
7935 * SYSFS fan layout: hwmon compatible (device)
7936 *
7937 * pwm*_enable:
7938 * 0: "disengaged" mode
7939 * 1: manual mode
7940 * 2: native EC "auto" mode (recommended, hardware default)
7941 *
7942 * pwm*: set speed in manual mode, ignored otherwise.
7943 * 0 is level 0; 255 is level 7. Intermediate points done with linear
7944 * interpolation.
7945 *
7946 * fan*_input: tachometer reading, RPM
7947 *
7948 *
7949 * SYSFS fan layout: extensions
7950 *
7951 * fan_watchdog (driver):
7952 * fan watchdog interval in seconds, 0 disables (default), max 120
7953 */
7954
7955 /* sysfs fan pwm1_enable ----------------------------------------------- */
7956 static ssize_t fan_pwm1_enable_show(struct device *dev,
7957 struct device_attribute *attr,
7958 char *buf)
7959 {
7960 int res, mode;
7961 u8 status;
7962
7963 res = fan_get_status_safe(&status);
7964 if (res)
7965 return res;
7966
7967 if (status & TP_EC_FAN_FULLSPEED) {
7968 mode = 0;
7969 } else if (status & TP_EC_FAN_AUTO) {
7970 mode = 2;
7971 } else
7972 mode = 1;
7973
7974 return snprintf(buf, PAGE_SIZE, "%d\n", mode);
7975 }
7976
7977 static ssize_t fan_pwm1_enable_store(struct device *dev,
7978 struct device_attribute *attr,
7979 const char *buf, size_t count)
7980 {
7981 unsigned long t;
7982 int res, level;
7983
7984 if (parse_strtoul(buf, 2, &t))
7985 return -EINVAL;
7986
7987 tpacpi_disclose_usertask("hwmon pwm1_enable",
7988 "set fan mode to %lu\n", t);
7989
7990 switch (t) {
7991 case 0:
7992 level = TP_EC_FAN_FULLSPEED;
7993 break;
7994 case 1:
7995 level = TPACPI_FAN_LAST_LEVEL;
7996 break;
7997 case 2:
7998 level = TP_EC_FAN_AUTO;
7999 break;
8000 case 3:
8001 /* reserved for software-controlled auto mode */
8002 return -ENOSYS;
8003 default:
8004 return -EINVAL;
8005 }
8006
8007 res = fan_set_level_safe(level);
8008 if (res == -ENXIO)
8009 return -EINVAL;
8010 else if (res < 0)
8011 return res;
8012
8013 fan_watchdog_reset();
8014
8015 return count;
8016 }
8017
8018 static struct device_attribute dev_attr_fan_pwm1_enable =
8019 __ATTR(pwm1_enable, S_IWUSR | S_IRUGO,
8020 fan_pwm1_enable_show, fan_pwm1_enable_store);
8021
8022 /* sysfs fan pwm1 ------------------------------------------------------ */
8023 static ssize_t fan_pwm1_show(struct device *dev,
8024 struct device_attribute *attr,
8025 char *buf)
8026 {
8027 int res;
8028 u8 status;
8029
8030 res = fan_get_status_safe(&status);
8031 if (res)
8032 return res;
8033
8034 if ((status &
8035 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) != 0)
8036 status = fan_control_desired_level;
8037
8038 if (status > 7)
8039 status = 7;
8040
8041 return snprintf(buf, PAGE_SIZE, "%u\n", (status * 255) / 7);
8042 }
8043
8044 static ssize_t fan_pwm1_store(struct device *dev,
8045 struct device_attribute *attr,
8046 const char *buf, size_t count)
8047 {
8048 unsigned long s;
8049 int rc;
8050 u8 status, newlevel;
8051
8052 if (parse_strtoul(buf, 255, &s))
8053 return -EINVAL;
8054
8055 tpacpi_disclose_usertask("hwmon pwm1",
8056 "set fan speed to %lu\n", s);
8057
8058 /* scale down from 0-255 to 0-7 */
8059 newlevel = (s >> 5) & 0x07;
8060
8061 if (mutex_lock_killable(&fan_mutex))
8062 return -ERESTARTSYS;
8063
8064 rc = fan_get_status(&status);
8065 if (!rc && (status &
8066 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
8067 rc = fan_set_level(newlevel);
8068 if (rc == -ENXIO)
8069 rc = -EINVAL;
8070 else if (!rc) {
8071 fan_update_desired_level(newlevel);
8072 fan_watchdog_reset();
8073 }
8074 }
8075
8076 mutex_unlock(&fan_mutex);
8077 return (rc) ? rc : count;
8078 }
8079
8080 static struct device_attribute dev_attr_fan_pwm1 =
8081 __ATTR(pwm1, S_IWUSR | S_IRUGO,
8082 fan_pwm1_show, fan_pwm1_store);
8083
8084 /* sysfs fan fan1_input ------------------------------------------------ */
8085 static ssize_t fan_fan1_input_show(struct device *dev,
8086 struct device_attribute *attr,
8087 char *buf)
8088 {
8089 int res;
8090 unsigned int speed;
8091
8092 res = fan_get_speed(&speed);
8093 if (res < 0)
8094 return res;
8095
8096 return snprintf(buf, PAGE_SIZE, "%u\n", speed);
8097 }
8098
8099 static struct device_attribute dev_attr_fan_fan1_input =
8100 __ATTR(fan1_input, S_IRUGO,
8101 fan_fan1_input_show, NULL);
8102
8103 /* sysfs fan fan2_input ------------------------------------------------ */
8104 static ssize_t fan_fan2_input_show(struct device *dev,
8105 struct device_attribute *attr,
8106 char *buf)
8107 {
8108 int res;
8109 unsigned int speed;
8110
8111 res = fan2_get_speed(&speed);
8112 if (res < 0)
8113 return res;
8114
8115 return snprintf(buf, PAGE_SIZE, "%u\n", speed);
8116 }
8117
8118 static struct device_attribute dev_attr_fan_fan2_input =
8119 __ATTR(fan2_input, S_IRUGO,
8120 fan_fan2_input_show, NULL);
8121
8122 /* sysfs fan fan_watchdog (hwmon driver) ------------------------------- */
8123 static ssize_t fan_fan_watchdog_show(struct device_driver *drv,
8124 char *buf)
8125 {
8126 return snprintf(buf, PAGE_SIZE, "%u\n", fan_watchdog_maxinterval);
8127 }
8128
8129 static ssize_t fan_fan_watchdog_store(struct device_driver *drv,
8130 const char *buf, size_t count)
8131 {
8132 unsigned long t;
8133
8134 if (parse_strtoul(buf, 120, &t))
8135 return -EINVAL;
8136
8137 if (!fan_control_allowed)
8138 return -EPERM;
8139
8140 fan_watchdog_maxinterval = t;
8141 fan_watchdog_reset();
8142
8143 tpacpi_disclose_usertask("fan_watchdog", "set to %lu\n", t);
8144
8145 return count;
8146 }
8147
8148 static DRIVER_ATTR(fan_watchdog, S_IWUSR | S_IRUGO,
8149 fan_fan_watchdog_show, fan_fan_watchdog_store);
8150
8151 /* --------------------------------------------------------------------- */
8152 static struct attribute *fan_attributes[] = {
8153 &dev_attr_fan_pwm1_enable.attr, &dev_attr_fan_pwm1.attr,
8154 &dev_attr_fan_fan1_input.attr,
8155 NULL, /* for fan2_input */
8156 NULL
8157 };
8158
8159 static const struct attribute_group fan_attr_group = {
8160 .attrs = fan_attributes,
8161 };
8162
8163 #define TPACPI_FAN_Q1 0x0001 /* Unitialized HFSP */
8164 #define TPACPI_FAN_2FAN 0x0002 /* EC 0x31 bit 0 selects fan2 */
8165
8166 #define TPACPI_FAN_QI(__id1, __id2, __quirks) \
8167 { .vendor = PCI_VENDOR_ID_IBM, \
8168 .bios = TPACPI_MATCH_ANY, \
8169 .ec = TPID(__id1, __id2), \
8170 .quirks = __quirks }
8171
8172 #define TPACPI_FAN_QL(__id1, __id2, __quirks) \
8173 { .vendor = PCI_VENDOR_ID_LENOVO, \
8174 .bios = TPACPI_MATCH_ANY, \
8175 .ec = TPID(__id1, __id2), \
8176 .quirks = __quirks }
8177
8178 static const struct tpacpi_quirk fan_quirk_table[] __initconst = {
8179 TPACPI_FAN_QI('1', 'Y', TPACPI_FAN_Q1),
8180 TPACPI_FAN_QI('7', '8', TPACPI_FAN_Q1),
8181 TPACPI_FAN_QI('7', '6', TPACPI_FAN_Q1),
8182 TPACPI_FAN_QI('7', '0', TPACPI_FAN_Q1),
8183 TPACPI_FAN_QL('7', 'M', TPACPI_FAN_2FAN),
8184 };
8185
8186 #undef TPACPI_FAN_QL
8187 #undef TPACPI_FAN_QI
8188
8189 static int __init fan_init(struct ibm_init_struct *iibm)
8190 {
8191 int rc;
8192 unsigned long quirks;
8193
8194 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
8195 "initializing fan subdriver\n");
8196
8197 mutex_init(&fan_mutex);
8198 fan_status_access_mode = TPACPI_FAN_NONE;
8199 fan_control_access_mode = TPACPI_FAN_WR_NONE;
8200 fan_control_commands = 0;
8201 fan_watchdog_maxinterval = 0;
8202 tp_features.fan_ctrl_status_undef = 0;
8203 tp_features.second_fan = 0;
8204 fan_control_desired_level = 7;
8205
8206 if (tpacpi_is_ibm()) {
8207 TPACPI_ACPIHANDLE_INIT(fans);
8208 TPACPI_ACPIHANDLE_INIT(gfan);
8209 TPACPI_ACPIHANDLE_INIT(sfan);
8210 }
8211
8212 quirks = tpacpi_check_quirks(fan_quirk_table,
8213 ARRAY_SIZE(fan_quirk_table));
8214
8215 if (gfan_handle) {
8216 /* 570, 600e/x, 770e, 770x */
8217 fan_status_access_mode = TPACPI_FAN_RD_ACPI_GFAN;
8218 } else {
8219 /* all other ThinkPads: note that even old-style
8220 * ThinkPad ECs supports the fan control register */
8221 if (likely(acpi_ec_read(fan_status_offset,
8222 &fan_control_initial_status))) {
8223 fan_status_access_mode = TPACPI_FAN_RD_TPEC;
8224 if (quirks & TPACPI_FAN_Q1)
8225 fan_quirk1_setup();
8226 if (quirks & TPACPI_FAN_2FAN) {
8227 tp_features.second_fan = 1;
8228 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
8229 "secondary fan support enabled\n");
8230 }
8231 } else {
8232 pr_err("ThinkPad ACPI EC access misbehaving, "
8233 "fan status and control unavailable\n");
8234 return 1;
8235 }
8236 }
8237
8238 if (sfan_handle) {
8239 /* 570, 770x-JL */
8240 fan_control_access_mode = TPACPI_FAN_WR_ACPI_SFAN;
8241 fan_control_commands |=
8242 TPACPI_FAN_CMD_LEVEL | TPACPI_FAN_CMD_ENABLE;
8243 } else {
8244 if (!gfan_handle) {
8245 /* gfan without sfan means no fan control */
8246 /* all other models implement TP EC 0x2f control */
8247
8248 if (fans_handle) {
8249 /* X31, X40, X41 */
8250 fan_control_access_mode =
8251 TPACPI_FAN_WR_ACPI_FANS;
8252 fan_control_commands |=
8253 TPACPI_FAN_CMD_SPEED |
8254 TPACPI_FAN_CMD_LEVEL |
8255 TPACPI_FAN_CMD_ENABLE;
8256 } else {
8257 fan_control_access_mode = TPACPI_FAN_WR_TPEC;
8258 fan_control_commands |=
8259 TPACPI_FAN_CMD_LEVEL |
8260 TPACPI_FAN_CMD_ENABLE;
8261 }
8262 }
8263 }
8264
8265 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
8266 "fan is %s, modes %d, %d\n",
8267 str_supported(fan_status_access_mode != TPACPI_FAN_NONE ||
8268 fan_control_access_mode != TPACPI_FAN_WR_NONE),
8269 fan_status_access_mode, fan_control_access_mode);
8270
8271 /* fan control master switch */
8272 if (!fan_control_allowed) {
8273 fan_control_access_mode = TPACPI_FAN_WR_NONE;
8274 fan_control_commands = 0;
8275 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
8276 "fan control features disabled by parameter\n");
8277 }
8278
8279 /* update fan_control_desired_level */
8280 if (fan_status_access_mode != TPACPI_FAN_NONE)
8281 fan_get_status_safe(NULL);
8282
8283 if (fan_status_access_mode != TPACPI_FAN_NONE ||
8284 fan_control_access_mode != TPACPI_FAN_WR_NONE) {
8285 if (tp_features.second_fan) {
8286 /* attach second fan tachometer */
8287 fan_attributes[ARRAY_SIZE(fan_attributes)-2] =
8288 &dev_attr_fan_fan2_input.attr;
8289 }
8290 rc = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
8291 &fan_attr_group);
8292 if (rc < 0)
8293 return rc;
8294
8295 rc = driver_create_file(&tpacpi_hwmon_pdriver.driver,
8296 &driver_attr_fan_watchdog);
8297 if (rc < 0) {
8298 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
8299 &fan_attr_group);
8300 return rc;
8301 }
8302 return 0;
8303 } else
8304 return 1;
8305 }
8306
8307 static void fan_exit(void)
8308 {
8309 vdbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_FAN,
8310 "cancelling any pending fan watchdog tasks\n");
8311
8312 /* FIXME: can we really do this unconditionally? */
8313 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj, &fan_attr_group);
8314 driver_remove_file(&tpacpi_hwmon_pdriver.driver,
8315 &driver_attr_fan_watchdog);
8316
8317 cancel_delayed_work(&fan_watchdog_task);
8318 flush_workqueue(tpacpi_wq);
8319 }
8320
8321 static void fan_suspend(void)
8322 {
8323 int rc;
8324
8325 if (!fan_control_allowed)
8326 return;
8327
8328 /* Store fan status in cache */
8329 fan_control_resume_level = 0;
8330 rc = fan_get_status_safe(&fan_control_resume_level);
8331 if (rc < 0)
8332 pr_notice("failed to read fan level for later "
8333 "restore during resume: %d\n", rc);
8334
8335 /* if it is undefined, don't attempt to restore it.
8336 * KEEP THIS LAST */
8337 if (tp_features.fan_ctrl_status_undef)
8338 fan_control_resume_level = 0;
8339 }
8340
8341 static void fan_resume(void)
8342 {
8343 u8 current_level = 7;
8344 bool do_set = false;
8345 int rc;
8346
8347 /* DSDT *always* updates status on resume */
8348 tp_features.fan_ctrl_status_undef = 0;
8349
8350 if (!fan_control_allowed ||
8351 !fan_control_resume_level ||
8352 (fan_get_status_safe(&current_level) < 0))
8353 return;
8354
8355 switch (fan_control_access_mode) {
8356 case TPACPI_FAN_WR_ACPI_SFAN:
8357 /* never decrease fan level */
8358 do_set = (fan_control_resume_level > current_level);
8359 break;
8360 case TPACPI_FAN_WR_ACPI_FANS:
8361 case TPACPI_FAN_WR_TPEC:
8362 /* never decrease fan level, scale is:
8363 * TP_EC_FAN_FULLSPEED > 7 >= TP_EC_FAN_AUTO
8364 *
8365 * We expect the firmware to set either 7 or AUTO, but we
8366 * handle FULLSPEED out of paranoia.
8367 *
8368 * So, we can safely only restore FULLSPEED or 7, anything
8369 * else could slow the fan. Restoring AUTO is useless, at
8370 * best that's exactly what the DSDT already set (it is the
8371 * slower it uses).
8372 *
8373 * Always keep in mind that the DSDT *will* have set the
8374 * fans to what the vendor supposes is the best level. We
8375 * muck with it only to speed the fan up.
8376 */
8377 if (fan_control_resume_level != 7 &&
8378 !(fan_control_resume_level & TP_EC_FAN_FULLSPEED))
8379 return;
8380 else
8381 do_set = !(current_level & TP_EC_FAN_FULLSPEED) &&
8382 (current_level != fan_control_resume_level);
8383 break;
8384 default:
8385 return;
8386 }
8387 if (do_set) {
8388 pr_notice("restoring fan level to 0x%02x\n",
8389 fan_control_resume_level);
8390 rc = fan_set_level_safe(fan_control_resume_level);
8391 if (rc < 0)
8392 pr_notice("failed to restore fan level: %d\n", rc);
8393 }
8394 }
8395
8396 static int fan_read(struct seq_file *m)
8397 {
8398 int rc;
8399 u8 status;
8400 unsigned int speed = 0;
8401
8402 switch (fan_status_access_mode) {
8403 case TPACPI_FAN_RD_ACPI_GFAN:
8404 /* 570, 600e/x, 770e, 770x */
8405 rc = fan_get_status_safe(&status);
8406 if (rc < 0)
8407 return rc;
8408
8409 seq_printf(m, "status:\t\t%s\n"
8410 "level:\t\t%d\n",
8411 (status != 0) ? "enabled" : "disabled", status);
8412 break;
8413
8414 case TPACPI_FAN_RD_TPEC:
8415 /* all except 570, 600e/x, 770e, 770x */
8416 rc = fan_get_status_safe(&status);
8417 if (rc < 0)
8418 return rc;
8419
8420 seq_printf(m, "status:\t\t%s\n",
8421 (status != 0) ? "enabled" : "disabled");
8422
8423 rc = fan_get_speed(&speed);
8424 if (rc < 0)
8425 return rc;
8426
8427 seq_printf(m, "speed:\t\t%d\n", speed);
8428
8429 if (status & TP_EC_FAN_FULLSPEED)
8430 /* Disengaged mode takes precedence */
8431 seq_printf(m, "level:\t\tdisengaged\n");
8432 else if (status & TP_EC_FAN_AUTO)
8433 seq_printf(m, "level:\t\tauto\n");
8434 else
8435 seq_printf(m, "level:\t\t%d\n", status);
8436 break;
8437
8438 case TPACPI_FAN_NONE:
8439 default:
8440 seq_printf(m, "status:\t\tnot supported\n");
8441 }
8442
8443 if (fan_control_commands & TPACPI_FAN_CMD_LEVEL) {
8444 seq_printf(m, "commands:\tlevel <level>");
8445
8446 switch (fan_control_access_mode) {
8447 case TPACPI_FAN_WR_ACPI_SFAN:
8448 seq_printf(m, " (<level> is 0-7)\n");
8449 break;
8450
8451 default:
8452 seq_printf(m, " (<level> is 0-7, "
8453 "auto, disengaged, full-speed)\n");
8454 break;
8455 }
8456 }
8457
8458 if (fan_control_commands & TPACPI_FAN_CMD_ENABLE)
8459 seq_printf(m, "commands:\tenable, disable\n"
8460 "commands:\twatchdog <timeout> (<timeout> "
8461 "is 0 (off), 1-120 (seconds))\n");
8462
8463 if (fan_control_commands & TPACPI_FAN_CMD_SPEED)
8464 seq_printf(m, "commands:\tspeed <speed>"
8465 " (<speed> is 0-65535)\n");
8466
8467 return 0;
8468 }
8469
8470 static int fan_write_cmd_level(const char *cmd, int *rc)
8471 {
8472 int level;
8473
8474 if (strlencmp(cmd, "level auto") == 0)
8475 level = TP_EC_FAN_AUTO;
8476 else if ((strlencmp(cmd, "level disengaged") == 0) |
8477 (strlencmp(cmd, "level full-speed") == 0))
8478 level = TP_EC_FAN_FULLSPEED;
8479 else if (sscanf(cmd, "level %d", &level) != 1)
8480 return 0;
8481
8482 *rc = fan_set_level_safe(level);
8483 if (*rc == -ENXIO)
8484 pr_err("level command accepted for unsupported access mode %d\n",
8485 fan_control_access_mode);
8486 else if (!*rc)
8487 tpacpi_disclose_usertask("procfs fan",
8488 "set level to %d\n", level);
8489
8490 return 1;
8491 }
8492
8493 static int fan_write_cmd_enable(const char *cmd, int *rc)
8494 {
8495 if (strlencmp(cmd, "enable") != 0)
8496 return 0;
8497
8498 *rc = fan_set_enable();
8499 if (*rc == -ENXIO)
8500 pr_err("enable command accepted for unsupported access mode %d\n",
8501 fan_control_access_mode);
8502 else if (!*rc)
8503 tpacpi_disclose_usertask("procfs fan", "enable\n");
8504
8505 return 1;
8506 }
8507
8508 static int fan_write_cmd_disable(const char *cmd, int *rc)
8509 {
8510 if (strlencmp(cmd, "disable") != 0)
8511 return 0;
8512
8513 *rc = fan_set_disable();
8514 if (*rc == -ENXIO)
8515 pr_err("disable command accepted for unsupported access mode %d\n",
8516 fan_control_access_mode);
8517 else if (!*rc)
8518 tpacpi_disclose_usertask("procfs fan", "disable\n");
8519
8520 return 1;
8521 }
8522
8523 static int fan_write_cmd_speed(const char *cmd, int *rc)
8524 {
8525 int speed;
8526
8527 /* TODO:
8528 * Support speed <low> <medium> <high> ? */
8529
8530 if (sscanf(cmd, "speed %d", &speed) != 1)
8531 return 0;
8532
8533 *rc = fan_set_speed(speed);
8534 if (*rc == -ENXIO)
8535 pr_err("speed command accepted for unsupported access mode %d\n",
8536 fan_control_access_mode);
8537 else if (!*rc)
8538 tpacpi_disclose_usertask("procfs fan",
8539 "set speed to %d\n", speed);
8540
8541 return 1;
8542 }
8543
8544 static int fan_write_cmd_watchdog(const char *cmd, int *rc)
8545 {
8546 int interval;
8547
8548 if (sscanf(cmd, "watchdog %d", &interval) != 1)
8549 return 0;
8550
8551 if (interval < 0 || interval > 120)
8552 *rc = -EINVAL;
8553 else {
8554 fan_watchdog_maxinterval = interval;
8555 tpacpi_disclose_usertask("procfs fan",
8556 "set watchdog timer to %d\n",
8557 interval);
8558 }
8559
8560 return 1;
8561 }
8562
8563 static int fan_write(char *buf)
8564 {
8565 char *cmd;
8566 int rc = 0;
8567
8568 while (!rc && (cmd = next_cmd(&buf))) {
8569 if (!((fan_control_commands & TPACPI_FAN_CMD_LEVEL) &&
8570 fan_write_cmd_level(cmd, &rc)) &&
8571 !((fan_control_commands & TPACPI_FAN_CMD_ENABLE) &&
8572 (fan_write_cmd_enable(cmd, &rc) ||
8573 fan_write_cmd_disable(cmd, &rc) ||
8574 fan_write_cmd_watchdog(cmd, &rc))) &&
8575 !((fan_control_commands & TPACPI_FAN_CMD_SPEED) &&
8576 fan_write_cmd_speed(cmd, &rc))
8577 )
8578 rc = -EINVAL;
8579 else if (!rc)
8580 fan_watchdog_reset();
8581 }
8582
8583 return rc;
8584 }
8585
8586 static struct ibm_struct fan_driver_data = {
8587 .name = "fan",
8588 .read = fan_read,
8589 .write = fan_write,
8590 .exit = fan_exit,
8591 .suspend = fan_suspend,
8592 .resume = fan_resume,
8593 };
8594
8595 /*************************************************************************
8596 * Mute LED subdriver
8597 */
8598
8599
8600 struct tp_led_table {
8601 acpi_string name;
8602 int on_value;
8603 int off_value;
8604 int state;
8605 };
8606
8607 static struct tp_led_table led_tables[] = {
8608 [TPACPI_LED_MUTE] = {
8609 .name = "SSMS",
8610 .on_value = 1,
8611 .off_value = 0,
8612 },
8613 [TPACPI_LED_MICMUTE] = {
8614 .name = "MMTS",
8615 .on_value = 2,
8616 .off_value = 0,
8617 },
8618 };
8619
8620 static int mute_led_on_off(struct tp_led_table *t, bool state)
8621 {
8622 acpi_handle temp;
8623 int output;
8624
8625 if (!ACPI_SUCCESS(acpi_get_handle(hkey_handle, t->name, &temp))) {
8626 pr_warn("Thinkpad ACPI has no %s interface.\n", t->name);
8627 return -EIO;
8628 }
8629
8630 if (!acpi_evalf(hkey_handle, &output, t->name, "dd",
8631 state ? t->on_value : t->off_value))
8632 return -EIO;
8633
8634 t->state = state;
8635 return state;
8636 }
8637
8638 int tpacpi_led_set(int whichled, bool on)
8639 {
8640 struct tp_led_table *t;
8641
8642 if (whichled < 0 || whichled >= TPACPI_LED_MAX)
8643 return -EINVAL;
8644
8645 t = &led_tables[whichled];
8646 if (t->state < 0 || t->state == on)
8647 return t->state;
8648 return mute_led_on_off(t, on);
8649 }
8650 EXPORT_SYMBOL_GPL(tpacpi_led_set);
8651
8652 static int mute_led_init(struct ibm_init_struct *iibm)
8653 {
8654 acpi_handle temp;
8655 int i;
8656
8657 for (i = 0; i < TPACPI_LED_MAX; i++) {
8658 struct tp_led_table *t = &led_tables[i];
8659 if (ACPI_SUCCESS(acpi_get_handle(hkey_handle, t->name, &temp)))
8660 mute_led_on_off(t, false);
8661 else
8662 t->state = -ENODEV;
8663 }
8664 return 0;
8665 }
8666
8667 static void mute_led_exit(void)
8668 {
8669 int i;
8670
8671 for (i = 0; i < TPACPI_LED_MAX; i++)
8672 tpacpi_led_set(i, false);
8673 }
8674
8675 static void mute_led_resume(void)
8676 {
8677 int i;
8678
8679 for (i = 0; i < TPACPI_LED_MAX; i++) {
8680 struct tp_led_table *t = &led_tables[i];
8681 if (t->state >= 0)
8682 mute_led_on_off(t, t->state);
8683 }
8684 }
8685
8686 static struct ibm_struct mute_led_driver_data = {
8687 .name = "mute_led",
8688 .exit = mute_led_exit,
8689 .resume = mute_led_resume,
8690 };
8691
8692 /****************************************************************************
8693 ****************************************************************************
8694 *
8695 * Infrastructure
8696 *
8697 ****************************************************************************
8698 ****************************************************************************/
8699
8700 /*
8701 * HKEY event callout for other subdrivers go here
8702 * (yes, it is ugly, but it is quick, safe, and gets the job done
8703 */
8704 static void tpacpi_driver_event(const unsigned int hkey_event)
8705 {
8706 if (ibm_backlight_device) {
8707 switch (hkey_event) {
8708 case TP_HKEY_EV_BRGHT_UP:
8709 case TP_HKEY_EV_BRGHT_DOWN:
8710 tpacpi_brightness_notify_change();
8711 }
8712 }
8713 if (alsa_card) {
8714 switch (hkey_event) {
8715 case TP_HKEY_EV_VOL_UP:
8716 case TP_HKEY_EV_VOL_DOWN:
8717 case TP_HKEY_EV_VOL_MUTE:
8718 volume_alsa_notify_change();
8719 }
8720 }
8721 }
8722
8723 static void hotkey_driver_event(const unsigned int scancode)
8724 {
8725 tpacpi_driver_event(TP_HKEY_EV_HOTKEY_BASE + scancode);
8726 }
8727
8728 /* sysfs name ---------------------------------------------------------- */
8729 static ssize_t thinkpad_acpi_pdev_name_show(struct device *dev,
8730 struct device_attribute *attr,
8731 char *buf)
8732 {
8733 return snprintf(buf, PAGE_SIZE, "%s\n", TPACPI_NAME);
8734 }
8735
8736 static struct device_attribute dev_attr_thinkpad_acpi_pdev_name =
8737 __ATTR(name, S_IRUGO, thinkpad_acpi_pdev_name_show, NULL);
8738
8739 /* --------------------------------------------------------------------- */
8740
8741 /* /proc support */
8742 static struct proc_dir_entry *proc_dir;
8743
8744 /*
8745 * Module and infrastructure proble, init and exit handling
8746 */
8747
8748 static bool force_load;
8749
8750 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
8751 static const char * __init str_supported(int is_supported)
8752 {
8753 static char text_unsupported[] __initdata = "not supported";
8754
8755 return (is_supported) ? &text_unsupported[4] : &text_unsupported[0];
8756 }
8757 #endif /* CONFIG_THINKPAD_ACPI_DEBUG */
8758
8759 static void ibm_exit(struct ibm_struct *ibm)
8760 {
8761 dbg_printk(TPACPI_DBG_EXIT, "removing %s\n", ibm->name);
8762
8763 list_del_init(&ibm->all_drivers);
8764
8765 if (ibm->flags.acpi_notify_installed) {
8766 dbg_printk(TPACPI_DBG_EXIT,
8767 "%s: acpi_remove_notify_handler\n", ibm->name);
8768 BUG_ON(!ibm->acpi);
8769 acpi_remove_notify_handler(*ibm->acpi->handle,
8770 ibm->acpi->type,
8771 dispatch_acpi_notify);
8772 ibm->flags.acpi_notify_installed = 0;
8773 }
8774
8775 if (ibm->flags.proc_created) {
8776 dbg_printk(TPACPI_DBG_EXIT,
8777 "%s: remove_proc_entry\n", ibm->name);
8778 remove_proc_entry(ibm->name, proc_dir);
8779 ibm->flags.proc_created = 0;
8780 }
8781
8782 if (ibm->flags.acpi_driver_registered) {
8783 dbg_printk(TPACPI_DBG_EXIT,
8784 "%s: acpi_bus_unregister_driver\n", ibm->name);
8785 BUG_ON(!ibm->acpi);
8786 acpi_bus_unregister_driver(ibm->acpi->driver);
8787 kfree(ibm->acpi->driver);
8788 ibm->acpi->driver = NULL;
8789 ibm->flags.acpi_driver_registered = 0;
8790 }
8791
8792 if (ibm->flags.init_called && ibm->exit) {
8793 ibm->exit();
8794 ibm->flags.init_called = 0;
8795 }
8796
8797 dbg_printk(TPACPI_DBG_INIT, "finished removing %s\n", ibm->name);
8798 }
8799
8800 static int __init ibm_init(struct ibm_init_struct *iibm)
8801 {
8802 int ret;
8803 struct ibm_struct *ibm = iibm->data;
8804 struct proc_dir_entry *entry;
8805
8806 BUG_ON(ibm == NULL);
8807
8808 INIT_LIST_HEAD(&ibm->all_drivers);
8809
8810 if (ibm->flags.experimental && !experimental)
8811 return 0;
8812
8813 dbg_printk(TPACPI_DBG_INIT,
8814 "probing for %s\n", ibm->name);
8815
8816 if (iibm->init) {
8817 ret = iibm->init(iibm);
8818 if (ret > 0)
8819 return 0; /* probe failed */
8820 if (ret)
8821 return ret;
8822
8823 ibm->flags.init_called = 1;
8824 }
8825
8826 if (ibm->acpi) {
8827 if (ibm->acpi->hid) {
8828 ret = register_tpacpi_subdriver(ibm);
8829 if (ret)
8830 goto err_out;
8831 }
8832
8833 if (ibm->acpi->notify) {
8834 ret = setup_acpi_notify(ibm);
8835 if (ret == -ENODEV) {
8836 pr_notice("disabling subdriver %s\n",
8837 ibm->name);
8838 ret = 0;
8839 goto err_out;
8840 }
8841 if (ret < 0)
8842 goto err_out;
8843 }
8844 }
8845
8846 dbg_printk(TPACPI_DBG_INIT,
8847 "%s installed\n", ibm->name);
8848
8849 if (ibm->read) {
8850 umode_t mode = iibm->base_procfs_mode;
8851
8852 if (!mode)
8853 mode = S_IRUGO;
8854 if (ibm->write)
8855 mode |= S_IWUSR;
8856 entry = proc_create_data(ibm->name, mode, proc_dir,
8857 &dispatch_proc_fops, ibm);
8858 if (!entry) {
8859 pr_err("unable to create proc entry %s\n", ibm->name);
8860 ret = -ENODEV;
8861 goto err_out;
8862 }
8863 ibm->flags.proc_created = 1;
8864 }
8865
8866 list_add_tail(&ibm->all_drivers, &tpacpi_all_drivers);
8867
8868 return 0;
8869
8870 err_out:
8871 dbg_printk(TPACPI_DBG_INIT,
8872 "%s: at error exit path with result %d\n",
8873 ibm->name, ret);
8874
8875 ibm_exit(ibm);
8876 return (ret < 0) ? ret : 0;
8877 }
8878
8879 /* Probing */
8880
8881 static bool __pure __init tpacpi_is_fw_digit(const char c)
8882 {
8883 return (c >= '0' && c <= '9') || (c >= 'A' && c <= 'Z');
8884 }
8885
8886 /* Most models: xxyTkkWW (#.##c); Ancient 570/600 and -SL lacks (#.##c) */
8887 static bool __pure __init tpacpi_is_valid_fw_id(const char * const s,
8888 const char t)
8889 {
8890 return s && strlen(s) >= 8 &&
8891 tpacpi_is_fw_digit(s[0]) &&
8892 tpacpi_is_fw_digit(s[1]) &&
8893 s[2] == t &&
8894 (s[3] == 'T' || s[3] == 'N') &&
8895 tpacpi_is_fw_digit(s[4]) &&
8896 tpacpi_is_fw_digit(s[5]);
8897 }
8898
8899 /* returns 0 - probe ok, or < 0 - probe error.
8900 * Probe ok doesn't mean thinkpad found.
8901 * On error, kfree() cleanup on tp->* is not performed, caller must do it */
8902 static int __must_check __init get_thinkpad_model_data(
8903 struct thinkpad_id_data *tp)
8904 {
8905 const struct dmi_device *dev = NULL;
8906 char ec_fw_string[18];
8907 char const *s;
8908
8909 if (!tp)
8910 return -EINVAL;
8911
8912 memset(tp, 0, sizeof(*tp));
8913
8914 if (dmi_name_in_vendors("IBM"))
8915 tp->vendor = PCI_VENDOR_ID_IBM;
8916 else if (dmi_name_in_vendors("LENOVO"))
8917 tp->vendor = PCI_VENDOR_ID_LENOVO;
8918 else
8919 return 0;
8920
8921 s = dmi_get_system_info(DMI_BIOS_VERSION);
8922 tp->bios_version_str = kstrdup(s, GFP_KERNEL);
8923 if (s && !tp->bios_version_str)
8924 return -ENOMEM;
8925
8926 /* Really ancient ThinkPad 240X will fail this, which is fine */
8927 if (!(tpacpi_is_valid_fw_id(tp->bios_version_str, 'E') ||
8928 tpacpi_is_valid_fw_id(tp->bios_version_str, 'C')))
8929 return 0;
8930
8931 tp->bios_model = tp->bios_version_str[0]
8932 | (tp->bios_version_str[1] << 8);
8933 tp->bios_release = (tp->bios_version_str[4] << 8)
8934 | tp->bios_version_str[5];
8935
8936 /*
8937 * ThinkPad T23 or newer, A31 or newer, R50e or newer,
8938 * X32 or newer, all Z series; Some models must have an
8939 * up-to-date BIOS or they will not be detected.
8940 *
8941 * See http://thinkwiki.org/wiki/List_of_DMI_IDs
8942 */
8943 while ((dev = dmi_find_device(DMI_DEV_TYPE_OEM_STRING, NULL, dev))) {
8944 if (sscanf(dev->name,
8945 "IBM ThinkPad Embedded Controller -[%17c",
8946 ec_fw_string) == 1) {
8947 ec_fw_string[sizeof(ec_fw_string) - 1] = 0;
8948 ec_fw_string[strcspn(ec_fw_string, " ]")] = 0;
8949
8950 tp->ec_version_str = kstrdup(ec_fw_string, GFP_KERNEL);
8951 if (!tp->ec_version_str)
8952 return -ENOMEM;
8953
8954 if (tpacpi_is_valid_fw_id(ec_fw_string, 'H')) {
8955 tp->ec_model = ec_fw_string[0]
8956 | (ec_fw_string[1] << 8);
8957 tp->ec_release = (ec_fw_string[4] << 8)
8958 | ec_fw_string[5];
8959 } else {
8960 pr_notice("ThinkPad firmware release %s "
8961 "doesn't match the known patterns\n",
8962 ec_fw_string);
8963 pr_notice("please report this to %s\n",
8964 TPACPI_MAIL);
8965 }
8966 break;
8967 }
8968 }
8969
8970 s = dmi_get_system_info(DMI_PRODUCT_VERSION);
8971 if (s && !(strncasecmp(s, "ThinkPad", 8) && strncasecmp(s, "Lenovo", 6))) {
8972 tp->model_str = kstrdup(s, GFP_KERNEL);
8973 if (!tp->model_str)
8974 return -ENOMEM;
8975 } else {
8976 s = dmi_get_system_info(DMI_BIOS_VENDOR);
8977 if (s && !(strncasecmp(s, "Lenovo", 6))) {
8978 tp->model_str = kstrdup(s, GFP_KERNEL);
8979 if (!tp->model_str)
8980 return -ENOMEM;
8981 }
8982 }
8983
8984 s = dmi_get_system_info(DMI_PRODUCT_NAME);
8985 tp->nummodel_str = kstrdup(s, GFP_KERNEL);
8986 if (s && !tp->nummodel_str)
8987 return -ENOMEM;
8988
8989 return 0;
8990 }
8991
8992 static int __init probe_for_thinkpad(void)
8993 {
8994 int is_thinkpad;
8995
8996 if (acpi_disabled)
8997 return -ENODEV;
8998
8999 /* It would be dangerous to run the driver in this case */
9000 if (!tpacpi_is_ibm() && !tpacpi_is_lenovo())
9001 return -ENODEV;
9002
9003 /*
9004 * Non-ancient models have better DMI tagging, but very old models
9005 * don't. tpacpi_is_fw_known() is a cheat to help in that case.
9006 */
9007 is_thinkpad = (thinkpad_id.model_str != NULL) ||
9008 (thinkpad_id.ec_model != 0) ||
9009 tpacpi_is_fw_known();
9010
9011 /* The EC handler is required */
9012 tpacpi_acpi_handle_locate("ec", TPACPI_ACPI_EC_HID, &ec_handle);
9013 if (!ec_handle) {
9014 if (is_thinkpad)
9015 pr_err("Not yet supported ThinkPad detected!\n");
9016 return -ENODEV;
9017 }
9018
9019 if (!is_thinkpad && !force_load)
9020 return -ENODEV;
9021
9022 return 0;
9023 }
9024
9025 static void __init thinkpad_acpi_init_banner(void)
9026 {
9027 pr_info("%s v%s\n", TPACPI_DESC, TPACPI_VERSION);
9028 pr_info("%s\n", TPACPI_URL);
9029
9030 pr_info("ThinkPad BIOS %s, EC %s\n",
9031 (thinkpad_id.bios_version_str) ?
9032 thinkpad_id.bios_version_str : "unknown",
9033 (thinkpad_id.ec_version_str) ?
9034 thinkpad_id.ec_version_str : "unknown");
9035
9036 BUG_ON(!thinkpad_id.vendor);
9037
9038 if (thinkpad_id.model_str)
9039 pr_info("%s %s, model %s\n",
9040 (thinkpad_id.vendor == PCI_VENDOR_ID_IBM) ?
9041 "IBM" : ((thinkpad_id.vendor ==
9042 PCI_VENDOR_ID_LENOVO) ?
9043 "Lenovo" : "Unknown vendor"),
9044 thinkpad_id.model_str,
9045 (thinkpad_id.nummodel_str) ?
9046 thinkpad_id.nummodel_str : "unknown");
9047 }
9048
9049 /* Module init, exit, parameters */
9050
9051 static struct ibm_init_struct ibms_init[] __initdata = {
9052 {
9053 .data = &thinkpad_acpi_driver_data,
9054 },
9055 {
9056 .init = hotkey_init,
9057 .data = &hotkey_driver_data,
9058 },
9059 {
9060 .init = bluetooth_init,
9061 .data = &bluetooth_driver_data,
9062 },
9063 {
9064 .init = wan_init,
9065 .data = &wan_driver_data,
9066 },
9067 {
9068 .init = uwb_init,
9069 .data = &uwb_driver_data,
9070 },
9071 #ifdef CONFIG_THINKPAD_ACPI_VIDEO
9072 {
9073 .init = video_init,
9074 .base_procfs_mode = S_IRUSR,
9075 .data = &video_driver_data,
9076 },
9077 #endif
9078 {
9079 .init = light_init,
9080 .data = &light_driver_data,
9081 },
9082 {
9083 .init = cmos_init,
9084 .data = &cmos_driver_data,
9085 },
9086 {
9087 .init = led_init,
9088 .data = &led_driver_data,
9089 },
9090 {
9091 .init = beep_init,
9092 .data = &beep_driver_data,
9093 },
9094 {
9095 .init = thermal_init,
9096 .data = &thermal_driver_data,
9097 },
9098 {
9099 .init = brightness_init,
9100 .data = &brightness_driver_data,
9101 },
9102 {
9103 .init = volume_init,
9104 .data = &volume_driver_data,
9105 },
9106 {
9107 .init = fan_init,
9108 .data = &fan_driver_data,
9109 },
9110 {
9111 .init = mute_led_init,
9112 .data = &mute_led_driver_data,
9113 },
9114 };
9115
9116 static int __init set_ibm_param(const char *val, struct kernel_param *kp)
9117 {
9118 unsigned int i;
9119 struct ibm_struct *ibm;
9120
9121 if (!kp || !kp->name || !val)
9122 return -EINVAL;
9123
9124 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
9125 ibm = ibms_init[i].data;
9126 WARN_ON(ibm == NULL);
9127
9128 if (!ibm || !ibm->name)
9129 continue;
9130
9131 if (strcmp(ibm->name, kp->name) == 0 && ibm->write) {
9132 if (strlen(val) > sizeof(ibms_init[i].param) - 2)
9133 return -ENOSPC;
9134 strcpy(ibms_init[i].param, val);
9135 strcat(ibms_init[i].param, ",");
9136 return 0;
9137 }
9138 }
9139
9140 return -EINVAL;
9141 }
9142
9143 module_param(experimental, int, 0444);
9144 MODULE_PARM_DESC(experimental,
9145 "Enables experimental features when non-zero");
9146
9147 module_param_named(debug, dbg_level, uint, 0);
9148 MODULE_PARM_DESC(debug, "Sets debug level bit-mask");
9149
9150 module_param(force_load, bool, 0444);
9151 MODULE_PARM_DESC(force_load,
9152 "Attempts to load the driver even on a "
9153 "mis-identified ThinkPad when true");
9154
9155 module_param_named(fan_control, fan_control_allowed, bool, 0444);
9156 MODULE_PARM_DESC(fan_control,
9157 "Enables setting fan parameters features when true");
9158
9159 module_param_named(brightness_mode, brightness_mode, uint, 0444);
9160 MODULE_PARM_DESC(brightness_mode,
9161 "Selects brightness control strategy: "
9162 "0=auto, 1=EC, 2=UCMS, 3=EC+NVRAM");
9163
9164 module_param(brightness_enable, uint, 0444);
9165 MODULE_PARM_DESC(brightness_enable,
9166 "Enables backlight control when 1, disables when 0");
9167
9168 #ifdef CONFIG_THINKPAD_ACPI_ALSA_SUPPORT
9169 module_param_named(volume_mode, volume_mode, uint, 0444);
9170 MODULE_PARM_DESC(volume_mode,
9171 "Selects volume control strategy: "
9172 "0=auto, 1=EC, 2=N/A, 3=EC+NVRAM");
9173
9174 module_param_named(volume_capabilities, volume_capabilities, uint, 0444);
9175 MODULE_PARM_DESC(volume_capabilities,
9176 "Selects the mixer capabilites: "
9177 "0=auto, 1=volume and mute, 2=mute only");
9178
9179 module_param_named(volume_control, volume_control_allowed, bool, 0444);
9180 MODULE_PARM_DESC(volume_control,
9181 "Enables software override for the console audio "
9182 "control when true");
9183
9184 module_param_named(software_mute, software_mute_requested, bool, 0444);
9185 MODULE_PARM_DESC(software_mute,
9186 "Request full software mute control");
9187
9188 /* ALSA module API parameters */
9189 module_param_named(index, alsa_index, int, 0444);
9190 MODULE_PARM_DESC(index, "ALSA index for the ACPI EC Mixer");
9191 module_param_named(id, alsa_id, charp, 0444);
9192 MODULE_PARM_DESC(id, "ALSA id for the ACPI EC Mixer");
9193 module_param_named(enable, alsa_enable, bool, 0444);
9194 MODULE_PARM_DESC(enable, "Enable the ALSA interface for the ACPI EC Mixer");
9195 #endif /* CONFIG_THINKPAD_ACPI_ALSA_SUPPORT */
9196
9197 #define TPACPI_PARAM(feature) \
9198 module_param_call(feature, set_ibm_param, NULL, NULL, 0); \
9199 MODULE_PARM_DESC(feature, "Simulates thinkpad-acpi procfs command " \
9200 "at module load, see documentation")
9201
9202 TPACPI_PARAM(hotkey);
9203 TPACPI_PARAM(bluetooth);
9204 TPACPI_PARAM(video);
9205 TPACPI_PARAM(light);
9206 TPACPI_PARAM(cmos);
9207 TPACPI_PARAM(led);
9208 TPACPI_PARAM(beep);
9209 TPACPI_PARAM(brightness);
9210 TPACPI_PARAM(volume);
9211 TPACPI_PARAM(fan);
9212
9213 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
9214 module_param(dbg_wlswemul, uint, 0444);
9215 MODULE_PARM_DESC(dbg_wlswemul, "Enables WLSW emulation");
9216 module_param_named(wlsw_state, tpacpi_wlsw_emulstate, bool, 0);
9217 MODULE_PARM_DESC(wlsw_state,
9218 "Initial state of the emulated WLSW switch");
9219
9220 module_param(dbg_bluetoothemul, uint, 0444);
9221 MODULE_PARM_DESC(dbg_bluetoothemul, "Enables bluetooth switch emulation");
9222 module_param_named(bluetooth_state, tpacpi_bluetooth_emulstate, bool, 0);
9223 MODULE_PARM_DESC(bluetooth_state,
9224 "Initial state of the emulated bluetooth switch");
9225
9226 module_param(dbg_wwanemul, uint, 0444);
9227 MODULE_PARM_DESC(dbg_wwanemul, "Enables WWAN switch emulation");
9228 module_param_named(wwan_state, tpacpi_wwan_emulstate, bool, 0);
9229 MODULE_PARM_DESC(wwan_state,
9230 "Initial state of the emulated WWAN switch");
9231
9232 module_param(dbg_uwbemul, uint, 0444);
9233 MODULE_PARM_DESC(dbg_uwbemul, "Enables UWB switch emulation");
9234 module_param_named(uwb_state, tpacpi_uwb_emulstate, bool, 0);
9235 MODULE_PARM_DESC(uwb_state,
9236 "Initial state of the emulated UWB switch");
9237 #endif
9238
9239 static void thinkpad_acpi_module_exit(void)
9240 {
9241 struct ibm_struct *ibm, *itmp;
9242
9243 tpacpi_lifecycle = TPACPI_LIFE_EXITING;
9244
9245 list_for_each_entry_safe_reverse(ibm, itmp,
9246 &tpacpi_all_drivers,
9247 all_drivers) {
9248 ibm_exit(ibm);
9249 }
9250
9251 dbg_printk(TPACPI_DBG_INIT, "finished subdriver exit path...\n");
9252
9253 if (tpacpi_inputdev) {
9254 if (tp_features.input_device_registered)
9255 input_unregister_device(tpacpi_inputdev);
9256 else
9257 input_free_device(tpacpi_inputdev);
9258 kfree(hotkey_keycode_map);
9259 }
9260
9261 if (tpacpi_hwmon)
9262 hwmon_device_unregister(tpacpi_hwmon);
9263
9264 if (tp_features.sensors_pdev_attrs_registered)
9265 device_remove_file(&tpacpi_sensors_pdev->dev,
9266 &dev_attr_thinkpad_acpi_pdev_name);
9267 if (tpacpi_sensors_pdev)
9268 platform_device_unregister(tpacpi_sensors_pdev);
9269 if (tpacpi_pdev)
9270 platform_device_unregister(tpacpi_pdev);
9271
9272 if (tp_features.sensors_pdrv_attrs_registered)
9273 tpacpi_remove_driver_attributes(&tpacpi_hwmon_pdriver.driver);
9274 if (tp_features.platform_drv_attrs_registered)
9275 tpacpi_remove_driver_attributes(&tpacpi_pdriver.driver);
9276
9277 if (tp_features.sensors_pdrv_registered)
9278 platform_driver_unregister(&tpacpi_hwmon_pdriver);
9279
9280 if (tp_features.platform_drv_registered)
9281 platform_driver_unregister(&tpacpi_pdriver);
9282
9283 if (proc_dir)
9284 remove_proc_entry(TPACPI_PROC_DIR, acpi_root_dir);
9285
9286 if (tpacpi_wq)
9287 destroy_workqueue(tpacpi_wq);
9288
9289 kfree(thinkpad_id.bios_version_str);
9290 kfree(thinkpad_id.ec_version_str);
9291 kfree(thinkpad_id.model_str);
9292 kfree(thinkpad_id.nummodel_str);
9293 }
9294
9295
9296 static int __init thinkpad_acpi_module_init(void)
9297 {
9298 int ret, i;
9299
9300 tpacpi_lifecycle = TPACPI_LIFE_INIT;
9301
9302 /* Driver-level probe */
9303
9304 ret = get_thinkpad_model_data(&thinkpad_id);
9305 if (ret) {
9306 pr_err("unable to get DMI data: %d\n", ret);
9307 thinkpad_acpi_module_exit();
9308 return ret;
9309 }
9310 ret = probe_for_thinkpad();
9311 if (ret) {
9312 thinkpad_acpi_module_exit();
9313 return ret;
9314 }
9315
9316 /* Driver initialization */
9317
9318 thinkpad_acpi_init_banner();
9319 tpacpi_check_outdated_fw();
9320
9321 TPACPI_ACPIHANDLE_INIT(ecrd);
9322 TPACPI_ACPIHANDLE_INIT(ecwr);
9323
9324 tpacpi_wq = create_singlethread_workqueue(TPACPI_WORKQUEUE_NAME);
9325 if (!tpacpi_wq) {
9326 thinkpad_acpi_module_exit();
9327 return -ENOMEM;
9328 }
9329
9330 proc_dir = proc_mkdir(TPACPI_PROC_DIR, acpi_root_dir);
9331 if (!proc_dir) {
9332 pr_err("unable to create proc dir " TPACPI_PROC_DIR "\n");
9333 thinkpad_acpi_module_exit();
9334 return -ENODEV;
9335 }
9336
9337 ret = platform_driver_register(&tpacpi_pdriver);
9338 if (ret) {
9339 pr_err("unable to register main platform driver\n");
9340 thinkpad_acpi_module_exit();
9341 return ret;
9342 }
9343 tp_features.platform_drv_registered = 1;
9344
9345 ret = platform_driver_register(&tpacpi_hwmon_pdriver);
9346 if (ret) {
9347 pr_err("unable to register hwmon platform driver\n");
9348 thinkpad_acpi_module_exit();
9349 return ret;
9350 }
9351 tp_features.sensors_pdrv_registered = 1;
9352
9353 ret = tpacpi_create_driver_attributes(&tpacpi_pdriver.driver);
9354 if (!ret) {
9355 tp_features.platform_drv_attrs_registered = 1;
9356 ret = tpacpi_create_driver_attributes(
9357 &tpacpi_hwmon_pdriver.driver);
9358 }
9359 if (ret) {
9360 pr_err("unable to create sysfs driver attributes\n");
9361 thinkpad_acpi_module_exit();
9362 return ret;
9363 }
9364 tp_features.sensors_pdrv_attrs_registered = 1;
9365
9366
9367 /* Device initialization */
9368 tpacpi_pdev = platform_device_register_simple(TPACPI_DRVR_NAME, -1,
9369 NULL, 0);
9370 if (IS_ERR(tpacpi_pdev)) {
9371 ret = PTR_ERR(tpacpi_pdev);
9372 tpacpi_pdev = NULL;
9373 pr_err("unable to register platform device\n");
9374 thinkpad_acpi_module_exit();
9375 return ret;
9376 }
9377 tpacpi_sensors_pdev = platform_device_register_simple(
9378 TPACPI_HWMON_DRVR_NAME,
9379 -1, NULL, 0);
9380 if (IS_ERR(tpacpi_sensors_pdev)) {
9381 ret = PTR_ERR(tpacpi_sensors_pdev);
9382 tpacpi_sensors_pdev = NULL;
9383 pr_err("unable to register hwmon platform device\n");
9384 thinkpad_acpi_module_exit();
9385 return ret;
9386 }
9387 ret = device_create_file(&tpacpi_sensors_pdev->dev,
9388 &dev_attr_thinkpad_acpi_pdev_name);
9389 if (ret) {
9390 pr_err("unable to create sysfs hwmon device attributes\n");
9391 thinkpad_acpi_module_exit();
9392 return ret;
9393 }
9394 tp_features.sensors_pdev_attrs_registered = 1;
9395 tpacpi_hwmon = hwmon_device_register(&tpacpi_sensors_pdev->dev);
9396 if (IS_ERR(tpacpi_hwmon)) {
9397 ret = PTR_ERR(tpacpi_hwmon);
9398 tpacpi_hwmon = NULL;
9399 pr_err("unable to register hwmon device\n");
9400 thinkpad_acpi_module_exit();
9401 return ret;
9402 }
9403 mutex_init(&tpacpi_inputdev_send_mutex);
9404 tpacpi_inputdev = input_allocate_device();
9405 if (!tpacpi_inputdev) {
9406 thinkpad_acpi_module_exit();
9407 return -ENOMEM;
9408 } else {
9409 /* Prepare input device, but don't register */
9410 tpacpi_inputdev->name = "ThinkPad Extra Buttons";
9411 tpacpi_inputdev->phys = TPACPI_DRVR_NAME "/input0";
9412 tpacpi_inputdev->id.bustype = BUS_HOST;
9413 tpacpi_inputdev->id.vendor = thinkpad_id.vendor;
9414 tpacpi_inputdev->id.product = TPACPI_HKEY_INPUT_PRODUCT;
9415 tpacpi_inputdev->id.version = TPACPI_HKEY_INPUT_VERSION;
9416 tpacpi_inputdev->dev.parent = &tpacpi_pdev->dev;
9417 }
9418
9419 /* Init subdriver dependencies */
9420 tpacpi_detect_brightness_capabilities();
9421
9422 /* Init subdrivers */
9423 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
9424 ret = ibm_init(&ibms_init[i]);
9425 if (ret >= 0 && *ibms_init[i].param)
9426 ret = ibms_init[i].data->write(ibms_init[i].param);
9427 if (ret < 0) {
9428 thinkpad_acpi_module_exit();
9429 return ret;
9430 }
9431 }
9432
9433 tpacpi_lifecycle = TPACPI_LIFE_RUNNING;
9434
9435 ret = input_register_device(tpacpi_inputdev);
9436 if (ret < 0) {
9437 pr_err("unable to register input device\n");
9438 thinkpad_acpi_module_exit();
9439 return ret;
9440 } else {
9441 tp_features.input_device_registered = 1;
9442 }
9443
9444 return 0;
9445 }
9446
9447 MODULE_ALIAS(TPACPI_DRVR_SHORTNAME);
9448
9449 /*
9450 * This will autoload the driver in almost every ThinkPad
9451 * in widespread use.
9452 *
9453 * Only _VERY_ old models, like the 240, 240x and 570 lack
9454 * the HKEY event interface.
9455 */
9456 MODULE_DEVICE_TABLE(acpi, ibm_htk_device_ids);
9457
9458 /*
9459 * DMI matching for module autoloading
9460 *
9461 * See http://thinkwiki.org/wiki/List_of_DMI_IDs
9462 * See http://thinkwiki.org/wiki/BIOS_Upgrade_Downloads
9463 *
9464 * Only models listed in thinkwiki will be supported, so add yours
9465 * if it is not there yet.
9466 */
9467 #define IBM_BIOS_MODULE_ALIAS(__type) \
9468 MODULE_ALIAS("dmi:bvnIBM:bvr" __type "ET??WW*")
9469
9470 /* Ancient thinkpad BIOSes have to be identified by
9471 * BIOS type or model number, and there are far less
9472 * BIOS types than model numbers... */
9473 IBM_BIOS_MODULE_ALIAS("I[MU]"); /* 570, 570e */
9474
9475 MODULE_AUTHOR("Borislav Deianov <borislav@users.sf.net>");
9476 MODULE_AUTHOR("Henrique de Moraes Holschuh <hmh@hmh.eng.br>");
9477 MODULE_DESCRIPTION(TPACPI_DESC);
9478 MODULE_VERSION(TPACPI_VERSION);
9479 MODULE_LICENSE("GPL");
9480
9481 module_init(thinkpad_acpi_module_init);
9482 module_exit(thinkpad_acpi_module_exit);
Linux kernel - Deliverables
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