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The discovered bit in PGCCSR register indicates if the device has been
[linux-2.6/next.git] / drivers / platform / x86 / thinkpad_acpi.c
blob34f167edcc5567e39e871757791e85993eb34c1b
1 /*
2 * thinkpad_acpi.c - ThinkPad ACPI Extras
3 *
4 *
5 * Copyright (C) 2004-2005 Borislav Deianov <borislav@users.sf.net>
6 * Copyright (C) 2006-2009 Henrique de Moraes Holschuh <hmh@hmh.eng.br>
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
21 * 02110-1301, USA.
22 */
23
24 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
25
26 #define TPACPI_VERSION "0.24"
27 #define TPACPI_SYSFS_VERSION 0x020700
28
29 /*
30 * Changelog:
31 * 2007-10-20 changelog trimmed down
32 *
33 * 2007-03-27 0.14 renamed to thinkpad_acpi and moved to
34 * drivers/misc.
35 *
36 * 2006-11-22 0.13 new maintainer
37 * changelog now lives in git commit history, and will
38 * not be updated further in-file.
39 *
40 * 2005-03-17 0.11 support for 600e, 770x
41 * thanks to Jamie Lentin <lentinj@dial.pipex.com>
42 *
43 * 2005-01-16 0.9 use MODULE_VERSION
44 * thanks to Henrik Brix Andersen <brix@gentoo.org>
45 * fix parameter passing on module loading
46 * thanks to Rusty Russell <rusty@rustcorp.com.au>
47 * thanks to Jim Radford <radford@blackbean.org>
48 * 2004-11-08 0.8 fix init error case, don't return from a macro
49 * thanks to Chris Wright <chrisw@osdl.org>
50 */
51
52 #include <linux/kernel.h>
53 #include <linux/module.h>
54 #include <linux/init.h>
55 #include <linux/types.h>
56 #include <linux/string.h>
57 #include <linux/list.h>
58 #include <linux/mutex.h>
59 #include <linux/sched.h>
60 #include <linux/kthread.h>
61 #include <linux/freezer.h>
62 #include <linux/delay.h>
63 #include <linux/slab.h>
64
65 #include <linux/nvram.h>
66 #include <linux/proc_fs.h>
67 #include <linux/seq_file.h>
68 #include <linux/sysfs.h>
69 #include <linux/backlight.h>
70 #include <linux/fb.h>
71 #include <linux/platform_device.h>
72 #include <linux/hwmon.h>
73 #include <linux/hwmon-sysfs.h>
74 #include <linux/input.h>
75 #include <linux/leds.h>
76 #include <linux/rfkill.h>
77 #include <asm/uaccess.h>
78
79 #include <linux/dmi.h>
80 #include <linux/jiffies.h>
81 #include <linux/workqueue.h>
82
83 #include <sound/core.h>
84 #include <sound/control.h>
85 #include <sound/initval.h>
86
87 #include <acpi/acpi_drivers.h>
88
89 #include <linux/pci_ids.h>
90
91
92 /* ThinkPad CMOS commands */
93 #define TP_CMOS_VOLUME_DOWN 0
94 #define TP_CMOS_VOLUME_UP 1
95 #define TP_CMOS_VOLUME_MUTE 2
96 #define TP_CMOS_BRIGHTNESS_UP 4
97 #define TP_CMOS_BRIGHTNESS_DOWN 5
98 #define TP_CMOS_THINKLIGHT_ON 12
99 #define TP_CMOS_THINKLIGHT_OFF 13
100
101 /* NVRAM Addresses */
102 enum tp_nvram_addr {
103 TP_NVRAM_ADDR_HK2 = 0x57,
104 TP_NVRAM_ADDR_THINKLIGHT = 0x58,
105 TP_NVRAM_ADDR_VIDEO = 0x59,
106 TP_NVRAM_ADDR_BRIGHTNESS = 0x5e,
107 TP_NVRAM_ADDR_MIXER = 0x60,
108 };
109
110 /* NVRAM bit masks */
111 enum {
112 TP_NVRAM_MASK_HKT_THINKPAD = 0x08,
113 TP_NVRAM_MASK_HKT_ZOOM = 0x20,
114 TP_NVRAM_MASK_HKT_DISPLAY = 0x40,
115 TP_NVRAM_MASK_HKT_HIBERNATE = 0x80,
116 TP_NVRAM_MASK_THINKLIGHT = 0x10,
117 TP_NVRAM_MASK_HKT_DISPEXPND = 0x30,
118 TP_NVRAM_MASK_HKT_BRIGHTNESS = 0x20,
119 TP_NVRAM_MASK_LEVEL_BRIGHTNESS = 0x0f,
120 TP_NVRAM_POS_LEVEL_BRIGHTNESS = 0,
121 TP_NVRAM_MASK_MUTE = 0x40,
122 TP_NVRAM_MASK_HKT_VOLUME = 0x80,
123 TP_NVRAM_MASK_LEVEL_VOLUME = 0x0f,
124 TP_NVRAM_POS_LEVEL_VOLUME = 0,
125 };
126
127 /* Misc NVRAM-related */
128 enum {
129 TP_NVRAM_LEVEL_VOLUME_MAX = 14,
130 };
131
132 /* ACPI HIDs */
133 #define TPACPI_ACPI_IBM_HKEY_HID "IBM0068"
134 #define TPACPI_ACPI_LENOVO_HKEY_HID "LEN0068"
135 #define TPACPI_ACPI_EC_HID "PNP0C09"
136
137 /* Input IDs */
138 #define TPACPI_HKEY_INPUT_PRODUCT 0x5054 /* "TP" */
139 #define TPACPI_HKEY_INPUT_VERSION 0x4101
140
141 /* ACPI \WGSV commands */
142 enum {
143 TP_ACPI_WGSV_GET_STATE = 0x01, /* Get state information */
144 TP_ACPI_WGSV_PWR_ON_ON_RESUME = 0x02, /* Resume WWAN powered on */
145 TP_ACPI_WGSV_PWR_OFF_ON_RESUME = 0x03, /* Resume WWAN powered off */
146 TP_ACPI_WGSV_SAVE_STATE = 0x04, /* Save state for S4/S5 */
147 };
148
149 /* TP_ACPI_WGSV_GET_STATE bits */
150 enum {
151 TP_ACPI_WGSV_STATE_WWANEXIST = 0x0001, /* WWAN hw available */
152 TP_ACPI_WGSV_STATE_WWANPWR = 0x0002, /* WWAN radio enabled */
153 TP_ACPI_WGSV_STATE_WWANPWRRES = 0x0004, /* WWAN state at resume */
154 TP_ACPI_WGSV_STATE_WWANBIOSOFF = 0x0008, /* WWAN disabled in BIOS */
155 TP_ACPI_WGSV_STATE_BLTHEXIST = 0x0001, /* BLTH hw available */
156 TP_ACPI_WGSV_STATE_BLTHPWR = 0x0002, /* BLTH radio enabled */
157 TP_ACPI_WGSV_STATE_BLTHPWRRES = 0x0004, /* BLTH state at resume */
158 TP_ACPI_WGSV_STATE_BLTHBIOSOFF = 0x0008, /* BLTH disabled in BIOS */
159 TP_ACPI_WGSV_STATE_UWBEXIST = 0x0010, /* UWB hw available */
160 TP_ACPI_WGSV_STATE_UWBPWR = 0x0020, /* UWB radio enabled */
161 };
162
163 /* HKEY events */
164 enum tpacpi_hkey_event_t {
165 /* Hotkey-related */
166 TP_HKEY_EV_HOTKEY_BASE = 0x1001, /* first hotkey (FN+F1) */
167 TP_HKEY_EV_BRGHT_UP = 0x1010, /* Brightness up */
168 TP_HKEY_EV_BRGHT_DOWN = 0x1011, /* Brightness down */
169 TP_HKEY_EV_VOL_UP = 0x1015, /* Volume up or unmute */
170 TP_HKEY_EV_VOL_DOWN = 0x1016, /* Volume down or unmute */
171 TP_HKEY_EV_VOL_MUTE = 0x1017, /* Mixer output mute */
172
173 /* Reasons for waking up from S3/S4 */
174 TP_HKEY_EV_WKUP_S3_UNDOCK = 0x2304, /* undock requested, S3 */
175 TP_HKEY_EV_WKUP_S4_UNDOCK = 0x2404, /* undock requested, S4 */
176 TP_HKEY_EV_WKUP_S3_BAYEJ = 0x2305, /* bay ejection req, S3 */
177 TP_HKEY_EV_WKUP_S4_BAYEJ = 0x2405, /* bay ejection req, S4 */
178 TP_HKEY_EV_WKUP_S3_BATLOW = 0x2313, /* battery empty, S3 */
179 TP_HKEY_EV_WKUP_S4_BATLOW = 0x2413, /* battery empty, S4 */
180
181 /* Auto-sleep after eject request */
182 TP_HKEY_EV_BAYEJ_ACK = 0x3003, /* bay ejection complete */
183 TP_HKEY_EV_UNDOCK_ACK = 0x4003, /* undock complete */
184
185 /* Misc bay events */
186 TP_HKEY_EV_OPTDRV_EJ = 0x3006, /* opt. drive tray ejected */
187 TP_HKEY_EV_HOTPLUG_DOCK = 0x4010, /* docked into hotplug dock
188 or port replicator */
189 TP_HKEY_EV_HOTPLUG_UNDOCK = 0x4011, /* undocked from hotplug
190 dock or port replicator */
191
192 /* User-interface events */
193 TP_HKEY_EV_LID_CLOSE = 0x5001, /* laptop lid closed */
194 TP_HKEY_EV_LID_OPEN = 0x5002, /* laptop lid opened */
195 TP_HKEY_EV_TABLET_TABLET = 0x5009, /* tablet swivel up */
196 TP_HKEY_EV_TABLET_NOTEBOOK = 0x500a, /* tablet swivel down */
197 TP_HKEY_EV_PEN_INSERTED = 0x500b, /* tablet pen inserted */
198 TP_HKEY_EV_PEN_REMOVED = 0x500c, /* tablet pen removed */
199 TP_HKEY_EV_BRGHT_CHANGED = 0x5010, /* backlight control event */
200
201 /* Key-related user-interface events */
202 TP_HKEY_EV_KEY_NUMLOCK = 0x6000, /* NumLock key pressed */
203 TP_HKEY_EV_KEY_FN = 0x6005, /* Fn key pressed? E420 */
204
205 /* Thermal events */
206 TP_HKEY_EV_ALARM_BAT_HOT = 0x6011, /* battery too hot */
207 TP_HKEY_EV_ALARM_BAT_XHOT = 0x6012, /* battery critically hot */
208 TP_HKEY_EV_ALARM_SENSOR_HOT = 0x6021, /* sensor too hot */
209 TP_HKEY_EV_ALARM_SENSOR_XHOT = 0x6022, /* sensor critically hot */
210 TP_HKEY_EV_THM_TABLE_CHANGED = 0x6030, /* thermal table changed */
211
212 TP_HKEY_EV_UNK_6040 = 0x6040, /* Related to AC change?
213 some sort of APM hint,
214 W520 */
215
216 /* Misc */
217 TP_HKEY_EV_RFKILL_CHANGED = 0x7000, /* rfkill switch changed */
218 };
219
220 /****************************************************************************
221 * Main driver
222 */
223
224 #define TPACPI_NAME "thinkpad"
225 #define TPACPI_DESC "ThinkPad ACPI Extras"
226 #define TPACPI_FILE TPACPI_NAME "_acpi"
227 #define TPACPI_URL "http://ibm-acpi.sf.net/"
228 #define TPACPI_MAIL "ibm-acpi-devel@lists.sourceforge.net"
229
230 #define TPACPI_PROC_DIR "ibm"
231 #define TPACPI_ACPI_EVENT_PREFIX "ibm"
232 #define TPACPI_DRVR_NAME TPACPI_FILE
233 #define TPACPI_DRVR_SHORTNAME "tpacpi"
234 #define TPACPI_HWMON_DRVR_NAME TPACPI_NAME "_hwmon"
235
236 #define TPACPI_NVRAM_KTHREAD_NAME "ktpacpi_nvramd"
237 #define TPACPI_WORKQUEUE_NAME "ktpacpid"
238
239 #define TPACPI_MAX_ACPI_ARGS 3
240
241 /* Debugging printk groups */
242 #define TPACPI_DBG_ALL 0xffff
243 #define TPACPI_DBG_DISCLOSETASK 0x8000
244 #define TPACPI_DBG_INIT 0x0001
245 #define TPACPI_DBG_EXIT 0x0002
246 #define TPACPI_DBG_RFKILL 0x0004
247 #define TPACPI_DBG_HKEY 0x0008
248 #define TPACPI_DBG_FAN 0x0010
249 #define TPACPI_DBG_BRGHT 0x0020
250 #define TPACPI_DBG_MIXER 0x0040
251
252 #define onoff(status, bit) ((status) & (1 << (bit)) ? "on" : "off")
253 #define enabled(status, bit) ((status) & (1 << (bit)) ? "enabled" : "disabled")
254 #define strlencmp(a, b) (strncmp((a), (b), strlen(b)))
255
256
257 /****************************************************************************
258 * Driver-wide structs and misc. variables
259 */
260
261 struct ibm_struct;
262
263 struct tp_acpi_drv_struct {
264 const struct acpi_device_id *hid;
265 struct acpi_driver *driver;
266
267 void (*notify) (struct ibm_struct *, u32);
268 acpi_handle *handle;
269 u32 type;
270 struct acpi_device *device;
271 };
272
273 struct ibm_struct {
274 char *name;
275
276 int (*read) (struct seq_file *);
277 int (*write) (char *);
278 void (*exit) (void);
279 void (*resume) (void);
280 void (*suspend) (pm_message_t state);
281 void (*shutdown) (void);
282
283 struct list_head all_drivers;
284
285 struct tp_acpi_drv_struct *acpi;
286
287 struct {
288 u8 acpi_driver_registered:1;
289 u8 acpi_notify_installed:1;
290 u8 proc_created:1;
291 u8 init_called:1;
292 u8 experimental:1;
293 } flags;
294 };
295
296 struct ibm_init_struct {
297 char param[32];
298
299 int (*init) (struct ibm_init_struct *);
300 mode_t base_procfs_mode;
301 struct ibm_struct *data;
302 };
303
304 static struct {
305 u32 bluetooth:1;
306 u32 hotkey:1;
307 u32 hotkey_mask:1;
308 u32 hotkey_wlsw:1;
309 u32 hotkey_tablet:1;
310 u32 light:1;
311 u32 light_status:1;
312 u32 bright_acpimode:1;
313 u32 bright_unkfw:1;
314 u32 wan:1;
315 u32 uwb:1;
316 u32 fan_ctrl_status_undef:1;
317 u32 second_fan:1;
318 u32 beep_needs_two_args:1;
319 u32 mixer_no_level_control:1;
320 u32 input_device_registered:1;
321 u32 platform_drv_registered:1;
322 u32 platform_drv_attrs_registered:1;
323 u32 sensors_pdrv_registered:1;
324 u32 sensors_pdrv_attrs_registered:1;
325 u32 sensors_pdev_attrs_registered:1;
326 u32 hotkey_poll_active:1;
327 } tp_features;
328
329 static struct {
330 u16 hotkey_mask_ff:1;
331 u16 volume_ctrl_forbidden:1;
332 } tp_warned;
333
334 struct thinkpad_id_data {
335 unsigned int vendor; /* ThinkPad vendor:
336 * PCI_VENDOR_ID_IBM/PCI_VENDOR_ID_LENOVO */
337
338 char *bios_version_str; /* Something like 1ZET51WW (1.03z) */
339 char *ec_version_str; /* Something like 1ZHT51WW-1.04a */
340
341 u16 bios_model; /* 1Y = 0x5931, 0 = unknown */
342 u16 ec_model;
343 u16 bios_release; /* 1ZETK1WW = 0x314b, 0 = unknown */
344 u16 ec_release;
345
346 char *model_str; /* ThinkPad T43 */
347 char *nummodel_str; /* 9384A9C for a 9384-A9C model */
348 };
349 static struct thinkpad_id_data thinkpad_id;
350
351 static enum {
352 TPACPI_LIFE_INIT = 0,
353 TPACPI_LIFE_RUNNING,
354 TPACPI_LIFE_EXITING,
355 } tpacpi_lifecycle;
356
357 static int experimental;
358 static u32 dbg_level;
359
360 static struct workqueue_struct *tpacpi_wq;
361
362 enum led_status_t {
363 TPACPI_LED_OFF = 0,
364 TPACPI_LED_ON,
365 TPACPI_LED_BLINK,
366 };
367
368 /* Special LED class that can defer work */
369 struct tpacpi_led_classdev {
370 struct led_classdev led_classdev;
371 struct work_struct work;
372 enum led_status_t new_state;
373 unsigned int led;
374 };
375
376 /* brightness level capabilities */
377 static unsigned int bright_maxlvl; /* 0 = unknown */
378
379 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
380 static int dbg_wlswemul;
381 static int tpacpi_wlsw_emulstate;
382 static int dbg_bluetoothemul;
383 static int tpacpi_bluetooth_emulstate;
384 static int dbg_wwanemul;
385 static int tpacpi_wwan_emulstate;
386 static int dbg_uwbemul;
387 static int tpacpi_uwb_emulstate;
388 #endif
389
390
391 /*************************************************************************
392 * Debugging helpers
393 */
394
395 #define dbg_printk(a_dbg_level, format, arg...) \
396 do { \
397 if (dbg_level & (a_dbg_level)) \
398 printk(KERN_DEBUG pr_fmt("%s: " format), \
399 __func__, ##arg); \
400 } while (0)
401
402 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
403 #define vdbg_printk dbg_printk
404 static const char *str_supported(int is_supported);
405 #else
406 static inline const char *str_supported(int is_supported) { return ""; }
407 #define vdbg_printk(a_dbg_level, format, arg...) \
408 no_printk(format, ##arg)
409 #endif
410
411 static void tpacpi_log_usertask(const char * const what)
412 {
413 printk(KERN_DEBUG pr_fmt("%s: access by process with PID %d\n"),
414 what, task_tgid_vnr(current));
415 }
416
417 #define tpacpi_disclose_usertask(what, format, arg...) \
418 do { \
419 if (unlikely((dbg_level & TPACPI_DBG_DISCLOSETASK) && \
420 (tpacpi_lifecycle == TPACPI_LIFE_RUNNING))) { \
421 printk(KERN_DEBUG pr_fmt("%s: PID %d: " format), \
422 what, task_tgid_vnr(current), ## arg); \
423 } \
424 } while (0)
425
426 /*
427 * Quirk handling helpers
428 *
429 * ThinkPad IDs and versions seen in the field so far
430 * are two-characters from the set [0-9A-Z], i.e. base 36.
431 *
432 * We use values well outside that range as specials.
433 */
434
435 #define TPACPI_MATCH_ANY 0xffffU
436 #define TPACPI_MATCH_UNKNOWN 0U
437
438 /* TPID('1', 'Y') == 0x5931 */
439 #define TPID(__c1, __c2) (((__c2) << 8) | (__c1))
440
441 #define TPACPI_Q_IBM(__id1, __id2, __quirk) \
442 { .vendor = PCI_VENDOR_ID_IBM, \
443 .bios = TPID(__id1, __id2), \
444 .ec = TPACPI_MATCH_ANY, \
445 .quirks = (__quirk) }
446
447 #define TPACPI_Q_LNV(__id1, __id2, __quirk) \
448 { .vendor = PCI_VENDOR_ID_LENOVO, \
449 .bios = TPID(__id1, __id2), \
450 .ec = TPACPI_MATCH_ANY, \
451 .quirks = (__quirk) }
452
453 #define TPACPI_QEC_LNV(__id1, __id2, __quirk) \
454 { .vendor = PCI_VENDOR_ID_LENOVO, \
455 .bios = TPACPI_MATCH_ANY, \
456 .ec = TPID(__id1, __id2), \
457 .quirks = (__quirk) }
458
459 struct tpacpi_quirk {
460 unsigned int vendor;
461 u16 bios;
462 u16 ec;
463 unsigned long quirks;
464 };
465
466 /**
467 * tpacpi_check_quirks() - search BIOS/EC version on a list
468 * @qlist: array of &struct tpacpi_quirk
469 * @qlist_size: number of elements in @qlist
470 *
471 * Iterates over a quirks list until one is found that matches the
472 * ThinkPad's vendor, BIOS and EC model.
473 *
474 * Returns 0 if nothing matches, otherwise returns the quirks field of
475 * the matching &struct tpacpi_quirk entry.
476 *
477 * The match criteria is: vendor, ec and bios much match.
478 */
479 static unsigned long __init tpacpi_check_quirks(
480 const struct tpacpi_quirk *qlist,
481 unsigned int qlist_size)
482 {
483 while (qlist_size) {
484 if ((qlist->vendor == thinkpad_id.vendor ||
485 qlist->vendor == TPACPI_MATCH_ANY) &&
486 (qlist->bios == thinkpad_id.bios_model ||
487 qlist->bios == TPACPI_MATCH_ANY) &&
488 (qlist->ec == thinkpad_id.ec_model ||
489 qlist->ec == TPACPI_MATCH_ANY))
490 return qlist->quirks;
491
492 qlist_size--;
493 qlist++;
494 }
495 return 0;
496 }
497
498 static inline bool __pure __init tpacpi_is_lenovo(void)
499 {
500 return thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO;
501 }
502
503 static inline bool __pure __init tpacpi_is_ibm(void)
504 {
505 return thinkpad_id.vendor == PCI_VENDOR_ID_IBM;
506 }
507
508 /****************************************************************************
509 ****************************************************************************
510 *
511 * ACPI Helpers and device model
512 *
513 ****************************************************************************
514 ****************************************************************************/
515
516 /*************************************************************************
517 * ACPI basic handles
518 */
519
520 static acpi_handle root_handle;
521 static acpi_handle ec_handle;
522
523 #define TPACPI_HANDLE(object, parent, paths...) \
524 static acpi_handle object##_handle; \
525 static const acpi_handle *object##_parent __initdata = \
526 &parent##_handle; \
527 static char *object##_paths[] __initdata = { paths }
528
529 TPACPI_HANDLE(ecrd, ec, "ECRD"); /* 570 */
530 TPACPI_HANDLE(ecwr, ec, "ECWR"); /* 570 */
531
532 TPACPI_HANDLE(cmos, root, "\\UCMS", /* R50, R50e, R50p, R51, */
533 /* T4x, X31, X40 */
534 "\\CMOS", /* A3x, G4x, R32, T23, T30, X22-24, X30 */
535 "\\CMS", /* R40, R40e */
536 ); /* all others */
537
538 TPACPI_HANDLE(hkey, ec, "\\_SB.HKEY", /* 600e/x, 770e, 770x */
539 "^HKEY", /* R30, R31 */
540 "HKEY", /* all others */
541 ); /* 570 */
542
543 /*************************************************************************
544 * ACPI helpers
545 */
546
547 static int acpi_evalf(acpi_handle handle,
548 void *res, char *method, char *fmt, ...)
549 {
550 char *fmt0 = fmt;
551 struct acpi_object_list params;
552 union acpi_object in_objs[TPACPI_MAX_ACPI_ARGS];
553 struct acpi_buffer result, *resultp;
554 union acpi_object out_obj;
555 acpi_status status;
556 va_list ap;
557 char res_type;
558 int success;
559 int quiet;
560
561 if (!*fmt) {
562 pr_err("acpi_evalf() called with empty format\n");
563 return 0;
564 }
565
566 if (*fmt == 'q') {
567 quiet = 1;
568 fmt++;
569 } else
570 quiet = 0;
571
572 res_type = *(fmt++);
573
574 params.count = 0;
575 params.pointer = &in_objs[0];
576
577 va_start(ap, fmt);
578 while (*fmt) {
579 char c = *(fmt++);
580 switch (c) {
581 case 'd': /* int */
582 in_objs[params.count].integer.value = va_arg(ap, int);
583 in_objs[params.count++].type = ACPI_TYPE_INTEGER;
584 break;
585 /* add more types as needed */
586 default:
587 pr_err("acpi_evalf() called "
588 "with invalid format character '%c'\n", c);
589 va_end(ap);
590 return 0;
591 }
592 }
593 va_end(ap);
594
595 if (res_type != 'v') {
596 result.length = sizeof(out_obj);
597 result.pointer = &out_obj;
598 resultp = &result;
599 } else
600 resultp = NULL;
601
602 status = acpi_evaluate_object(handle, method, &params, resultp);
603
604 switch (res_type) {
605 case 'd': /* int */
606 success = (status == AE_OK &&
607 out_obj.type == ACPI_TYPE_INTEGER);
608 if (success && res)
609 *(int *)res = out_obj.integer.value;
610 break;
611 case 'v': /* void */
612 success = status == AE_OK;
613 break;
614 /* add more types as needed */
615 default:
616 pr_err("acpi_evalf() called "
617 "with invalid format character '%c'\n", res_type);
618 return 0;
619 }
620
621 if (!success && !quiet)
622 pr_err("acpi_evalf(%s, %s, ...) failed: %s\n",
623 method, fmt0, acpi_format_exception(status));
624
625 return success;
626 }
627
628 static int acpi_ec_read(int i, u8 *p)
629 {
630 int v;
631
632 if (ecrd_handle) {
633 if (!acpi_evalf(ecrd_handle, &v, NULL, "dd", i))
634 return 0;
635 *p = v;
636 } else {
637 if (ec_read(i, p) < 0)
638 return 0;
639 }
640
641 return 1;
642 }
643
644 static int acpi_ec_write(int i, u8 v)
645 {
646 if (ecwr_handle) {
647 if (!acpi_evalf(ecwr_handle, NULL, NULL, "vdd", i, v))
648 return 0;
649 } else {
650 if (ec_write(i, v) < 0)
651 return 0;
652 }
653
654 return 1;
655 }
656
657 static int issue_thinkpad_cmos_command(int cmos_cmd)
658 {
659 if (!cmos_handle)
660 return -ENXIO;
661
662 if (!acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd))
663 return -EIO;
664
665 return 0;
666 }
667
668 /*************************************************************************
669 * ACPI device model
670 */
671
672 #define TPACPI_ACPIHANDLE_INIT(object) \
673 drv_acpi_handle_init(#object, &object##_handle, *object##_parent, \
674 object##_paths, ARRAY_SIZE(object##_paths))
675
676 static void __init drv_acpi_handle_init(const char *name,
677 acpi_handle *handle, const acpi_handle parent,
678 char **paths, const int num_paths)
679 {
680 int i;
681 acpi_status status;
682
683 vdbg_printk(TPACPI_DBG_INIT, "trying to locate ACPI handle for %s\n",
684 name);
685
686 for (i = 0; i < num_paths; i++) {
687 status = acpi_get_handle(parent, paths[i], handle);
688 if (ACPI_SUCCESS(status)) {
689 dbg_printk(TPACPI_DBG_INIT,
690 "Found ACPI handle %s for %s\n",
691 paths[i], name);
692 return;
693 }
694 }
695
696 vdbg_printk(TPACPI_DBG_INIT, "ACPI handle for %s not found\n",
697 name);
698 *handle = NULL;
699 }
700
701 static acpi_status __init tpacpi_acpi_handle_locate_callback(acpi_handle handle,
702 u32 level, void *context, void **return_value)
703 {
704 *(acpi_handle *)return_value = handle;
705
706 return AE_CTRL_TERMINATE;
707 }
708
709 static void __init tpacpi_acpi_handle_locate(const char *name,
710 const char *hid,
711 acpi_handle *handle)
712 {
713 acpi_status status;
714 acpi_handle device_found;
715
716 BUG_ON(!name || !hid || !handle);
717 vdbg_printk(TPACPI_DBG_INIT,
718 "trying to locate ACPI handle for %s, using HID %s\n",
719 name, hid);
720
721 memset(&device_found, 0, sizeof(device_found));
722 status = acpi_get_devices(hid, tpacpi_acpi_handle_locate_callback,
723 (void *)name, &device_found);
724
725 *handle = NULL;
726
727 if (ACPI_SUCCESS(status)) {
728 *handle = device_found;
729 dbg_printk(TPACPI_DBG_INIT,
730 "Found ACPI handle for %s\n", name);
731 } else {
732 vdbg_printk(TPACPI_DBG_INIT,
733 "Could not locate an ACPI handle for %s: %s\n",
734 name, acpi_format_exception(status));
735 }
736 }
737
738 static void dispatch_acpi_notify(acpi_handle handle, u32 event, void *data)
739 {
740 struct ibm_struct *ibm = data;
741
742 if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
743 return;
744
745 if (!ibm || !ibm->acpi || !ibm->acpi->notify)
746 return;
747
748 ibm->acpi->notify(ibm, event);
749 }
750
751 static int __init setup_acpi_notify(struct ibm_struct *ibm)
752 {
753 acpi_status status;
754 int rc;
755
756 BUG_ON(!ibm->acpi);
757
758 if (!*ibm->acpi->handle)
759 return 0;
760
761 vdbg_printk(TPACPI_DBG_INIT,
762 "setting up ACPI notify for %s\n", ibm->name);
763
764 rc = acpi_bus_get_device(*ibm->acpi->handle, &ibm->acpi->device);
765 if (rc < 0) {
766 pr_err("acpi_bus_get_device(%s) failed: %d\n", ibm->name, rc);
767 return -ENODEV;
768 }
769
770 ibm->acpi->device->driver_data = ibm;
771 sprintf(acpi_device_class(ibm->acpi->device), "%s/%s",
772 TPACPI_ACPI_EVENT_PREFIX,
773 ibm->name);
774
775 status = acpi_install_notify_handler(*ibm->acpi->handle,
776 ibm->acpi->type, dispatch_acpi_notify, ibm);
777 if (ACPI_FAILURE(status)) {
778 if (status == AE_ALREADY_EXISTS) {
779 pr_notice("another device driver is already "
780 "handling %s events\n", ibm->name);
781 } else {
782 pr_err("acpi_install_notify_handler(%s) failed: %s\n",
783 ibm->name, acpi_format_exception(status));
784 }
785 return -ENODEV;
786 }
787 ibm->flags.acpi_notify_installed = 1;
788 return 0;
789 }
790
791 static int __init tpacpi_device_add(struct acpi_device *device)
792 {
793 return 0;
794 }
795
796 static int __init register_tpacpi_subdriver(struct ibm_struct *ibm)
797 {
798 int rc;
799
800 dbg_printk(TPACPI_DBG_INIT,
801 "registering %s as an ACPI driver\n", ibm->name);
802
803 BUG_ON(!ibm->acpi);
804
805 ibm->acpi->driver = kzalloc(sizeof(struct acpi_driver), GFP_KERNEL);
806 if (!ibm->acpi->driver) {
807 pr_err("failed to allocate memory for ibm->acpi->driver\n");
808 return -ENOMEM;
809 }
810
811 sprintf(ibm->acpi->driver->name, "%s_%s", TPACPI_NAME, ibm->name);
812 ibm->acpi->driver->ids = ibm->acpi->hid;
813
814 ibm->acpi->driver->ops.add = &tpacpi_device_add;
815
816 rc = acpi_bus_register_driver(ibm->acpi->driver);
817 if (rc < 0) {
818 pr_err("acpi_bus_register_driver(%s) failed: %d\n",
819 ibm->name, rc);
820 kfree(ibm->acpi->driver);
821 ibm->acpi->driver = NULL;
822 } else if (!rc)
823 ibm->flags.acpi_driver_registered = 1;
824
825 return rc;
826 }
827
828
829 /****************************************************************************
830 ****************************************************************************
831 *
832 * Procfs Helpers
833 *
834 ****************************************************************************
835 ****************************************************************************/
836
837 static int dispatch_proc_show(struct seq_file *m, void *v)
838 {
839 struct ibm_struct *ibm = m->private;
840
841 if (!ibm || !ibm->read)
842 return -EINVAL;
843 return ibm->read(m);
844 }
845
846 static int dispatch_proc_open(struct inode *inode, struct file *file)
847 {
848 return single_open(file, dispatch_proc_show, PDE(inode)->data);
849 }
850
851 static ssize_t dispatch_proc_write(struct file *file,
852 const char __user *userbuf,
853 size_t count, loff_t *pos)
854 {
855 struct ibm_struct *ibm = PDE(file->f_path.dentry->d_inode)->data;
856 char *kernbuf;
857 int ret;
858
859 if (!ibm || !ibm->write)
860 return -EINVAL;
861 if (count > PAGE_SIZE - 2)
862 return -EINVAL;
863
864 kernbuf = kmalloc(count + 2, GFP_KERNEL);
865 if (!kernbuf)
866 return -ENOMEM;
867
868 if (copy_from_user(kernbuf, userbuf, count)) {
869 kfree(kernbuf);
870 return -EFAULT;
871 }
872
873 kernbuf[count] = 0;
874 strcat(kernbuf, ",");
875 ret = ibm->write(kernbuf);
876 if (ret == 0)
877 ret = count;
878
879 kfree(kernbuf);
880
881 return ret;
882 }
883
884 static const struct file_operations dispatch_proc_fops = {
885 .owner = THIS_MODULE,
886 .open = dispatch_proc_open,
887 .read = seq_read,
888 .llseek = seq_lseek,
889 .release = single_release,
890 .write = dispatch_proc_write,
891 };
892
893 static char *next_cmd(char **cmds)
894 {
895 char *start = *cmds;
896 char *end;
897
898 while ((end = strchr(start, ',')) && end == start)
899 start = end + 1;
900
901 if (!end)
902 return NULL;
903
904 *end = 0;
905 *cmds = end + 1;
906 return start;
907 }
908
909
910 /****************************************************************************
911 ****************************************************************************
912 *
913 * Device model: input, hwmon and platform
914 *
915 ****************************************************************************
916 ****************************************************************************/
917
918 static struct platform_device *tpacpi_pdev;
919 static struct platform_device *tpacpi_sensors_pdev;
920 static struct device *tpacpi_hwmon;
921 static struct input_dev *tpacpi_inputdev;
922 static struct mutex tpacpi_inputdev_send_mutex;
923 static LIST_HEAD(tpacpi_all_drivers);
924
925 static int tpacpi_suspend_handler(struct platform_device *pdev,
926 pm_message_t state)
927 {
928 struct ibm_struct *ibm, *itmp;
929
930 list_for_each_entry_safe(ibm, itmp,
931 &tpacpi_all_drivers,
932 all_drivers) {
933 if (ibm->suspend)
934 (ibm->suspend)(state);
935 }
936
937 return 0;
938 }
939
940 static int tpacpi_resume_handler(struct platform_device *pdev)
941 {
942 struct ibm_struct *ibm, *itmp;
943
944 list_for_each_entry_safe(ibm, itmp,
945 &tpacpi_all_drivers,
946 all_drivers) {
947 if (ibm->resume)
948 (ibm->resume)();
949 }
950
951 return 0;
952 }
953
954 static void tpacpi_shutdown_handler(struct platform_device *pdev)
955 {
956 struct ibm_struct *ibm, *itmp;
957
958 list_for_each_entry_safe(ibm, itmp,
959 &tpacpi_all_drivers,
960 all_drivers) {
961 if (ibm->shutdown)
962 (ibm->shutdown)();
963 }
964 }
965
966 static struct platform_driver tpacpi_pdriver = {
967 .driver = {
968 .name = TPACPI_DRVR_NAME,
969 .owner = THIS_MODULE,
970 },
971 .suspend = tpacpi_suspend_handler,
972 .resume = tpacpi_resume_handler,
973 .shutdown = tpacpi_shutdown_handler,
974 };
975
976 static struct platform_driver tpacpi_hwmon_pdriver = {
977 .driver = {
978 .name = TPACPI_HWMON_DRVR_NAME,
979 .owner = THIS_MODULE,
980 },
981 };
982
983 /*************************************************************************
984 * sysfs support helpers
985 */
986
987 struct attribute_set {
988 unsigned int members, max_members;
989 struct attribute_group group;
990 };
991
992 struct attribute_set_obj {
993 struct attribute_set s;
994 struct attribute *a;
995 } __attribute__((packed));
996
997 static struct attribute_set *create_attr_set(unsigned int max_members,
998 const char *name)
999 {
1000 struct attribute_set_obj *sobj;
1001
1002 if (max_members == 0)
1003 return NULL;
1004
1005 /* Allocates space for implicit NULL at the end too */
1006 sobj = kzalloc(sizeof(struct attribute_set_obj) +
1007 max_members * sizeof(struct attribute *),
1008 GFP_KERNEL);
1009 if (!sobj)
1010 return NULL;
1011 sobj->s.max_members = max_members;
1012 sobj->s.group.attrs = &sobj->a;
1013 sobj->s.group.name = name;
1014
1015 return &sobj->s;
1016 }
1017
1018 #define destroy_attr_set(_set) \
1019 kfree(_set);
1020
1021 /* not multi-threaded safe, use it in a single thread per set */
1022 static int add_to_attr_set(struct attribute_set *s, struct attribute *attr)
1023 {
1024 if (!s || !attr)
1025 return -EINVAL;
1026
1027 if (s->members >= s->max_members)
1028 return -ENOMEM;
1029
1030 s->group.attrs[s->members] = attr;
1031 s->members++;
1032
1033 return 0;
1034 }
1035
1036 static int add_many_to_attr_set(struct attribute_set *s,
1037 struct attribute **attr,
1038 unsigned int count)
1039 {
1040 int i, res;
1041
1042 for (i = 0; i < count; i++) {
1043 res = add_to_attr_set(s, attr[i]);
1044 if (res)
1045 return res;
1046 }
1047
1048 return 0;
1049 }
1050
1051 static void delete_attr_set(struct attribute_set *s, struct kobject *kobj)
1052 {
1053 sysfs_remove_group(kobj, &s->group);
1054 destroy_attr_set(s);
1055 }
1056
1057 #define register_attr_set_with_sysfs(_attr_set, _kobj) \
1058 sysfs_create_group(_kobj, &_attr_set->group)
1059
1060 static int parse_strtoul(const char *buf,
1061 unsigned long max, unsigned long *value)
1062 {
1063 char *endp;
1064
1065 *value = simple_strtoul(skip_spaces(buf), &endp, 0);
1066 endp = skip_spaces(endp);
1067 if (*endp || *value > max)
1068 return -EINVAL;
1069
1070 return 0;
1071 }
1072
1073 static void tpacpi_disable_brightness_delay(void)
1074 {
1075 if (acpi_evalf(hkey_handle, NULL, "PWMS", "qvd", 0))
1076 pr_notice("ACPI backlight control delay disabled\n");
1077 }
1078
1079 static void printk_deprecated_attribute(const char * const what,
1080 const char * const details)
1081 {
1082 tpacpi_log_usertask("deprecated sysfs attribute");
1083 pr_warn("WARNING: sysfs attribute %s is deprecated and "
1084 "will be removed. %s\n",
1085 what, details);
1086 }
1087
1088 /*************************************************************************
1089 * rfkill and radio control support helpers
1090 */
1091
1092 /*
1093 * ThinkPad-ACPI firmware handling model:
1094 *
1095 * WLSW (master wireless switch) is event-driven, and is common to all
1096 * firmware-controlled radios. It cannot be controlled, just monitored,
1097 * as expected. It overrides all radio state in firmware
1098 *
1099 * The kernel, a masked-off hotkey, and WLSW can change the radio state
1100 * (TODO: verify how WLSW interacts with the returned radio state).
1101 *
1102 * The only time there are shadow radio state changes, is when
1103 * masked-off hotkeys are used.
1104 */
1105
1106 /*
1107 * Internal driver API for radio state:
1108 *
1109 * int: < 0 = error, otherwise enum tpacpi_rfkill_state
1110 * bool: true means radio blocked (off)
1111 */
1112 enum tpacpi_rfkill_state {
1113 TPACPI_RFK_RADIO_OFF = 0,
1114 TPACPI_RFK_RADIO_ON
1115 };
1116
1117 /* rfkill switches */
1118 enum tpacpi_rfk_id {
1119 TPACPI_RFK_BLUETOOTH_SW_ID = 0,
1120 TPACPI_RFK_WWAN_SW_ID,
1121 TPACPI_RFK_UWB_SW_ID,
1122 TPACPI_RFK_SW_MAX
1123 };
1124
1125 static const char *tpacpi_rfkill_names[] = {
1126 [TPACPI_RFK_BLUETOOTH_SW_ID] = "bluetooth",
1127 [TPACPI_RFK_WWAN_SW_ID] = "wwan",
1128 [TPACPI_RFK_UWB_SW_ID] = "uwb",
1129 [TPACPI_RFK_SW_MAX] = NULL
1130 };
1131
1132 /* ThinkPad-ACPI rfkill subdriver */
1133 struct tpacpi_rfk {
1134 struct rfkill *rfkill;
1135 enum tpacpi_rfk_id id;
1136 const struct tpacpi_rfk_ops *ops;
1137 };
1138
1139 struct tpacpi_rfk_ops {
1140 /* firmware interface */
1141 int (*get_status)(void);
1142 int (*set_status)(const enum tpacpi_rfkill_state);
1143 };
1144
1145 static struct tpacpi_rfk *tpacpi_rfkill_switches[TPACPI_RFK_SW_MAX];
1146
1147 /* Query FW and update rfkill sw state for a given rfkill switch */
1148 static int tpacpi_rfk_update_swstate(const struct tpacpi_rfk *tp_rfk)
1149 {
1150 int status;
1151
1152 if (!tp_rfk)
1153 return -ENODEV;
1154
1155 status = (tp_rfk->ops->get_status)();
1156 if (status < 0)
1157 return status;
1158
1159 rfkill_set_sw_state(tp_rfk->rfkill,
1160 (status == TPACPI_RFK_RADIO_OFF));
1161
1162 return status;
1163 }
1164
1165 /* Query FW and update rfkill sw state for all rfkill switches */
1166 static void tpacpi_rfk_update_swstate_all(void)
1167 {
1168 unsigned int i;
1169
1170 for (i = 0; i < TPACPI_RFK_SW_MAX; i++)
1171 tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[i]);
1172 }
1173
1174 /*
1175 * Sync the HW-blocking state of all rfkill switches,
1176 * do notice it causes the rfkill core to schedule uevents
1177 */
1178 static void tpacpi_rfk_update_hwblock_state(bool blocked)
1179 {
1180 unsigned int i;
1181 struct tpacpi_rfk *tp_rfk;
1182
1183 for (i = 0; i < TPACPI_RFK_SW_MAX; i++) {
1184 tp_rfk = tpacpi_rfkill_switches[i];
1185 if (tp_rfk) {
1186 if (rfkill_set_hw_state(tp_rfk->rfkill,
1187 blocked)) {
1188 /* ignore -- we track sw block */
1189 }
1190 }
1191 }
1192 }
1193
1194 /* Call to get the WLSW state from the firmware */
1195 static int hotkey_get_wlsw(void);
1196
1197 /* Call to query WLSW state and update all rfkill switches */
1198 static bool tpacpi_rfk_check_hwblock_state(void)
1199 {
1200 int res = hotkey_get_wlsw();
1201 int hw_blocked;
1202
1203 /* When unknown or unsupported, we have to assume it is unblocked */
1204 if (res < 0)
1205 return false;
1206
1207 hw_blocked = (res == TPACPI_RFK_RADIO_OFF);
1208 tpacpi_rfk_update_hwblock_state(hw_blocked);
1209
1210 return hw_blocked;
1211 }
1212
1213 static int tpacpi_rfk_hook_set_block(void *data, bool blocked)
1214 {
1215 struct tpacpi_rfk *tp_rfk = data;
1216 int res;
1217
1218 dbg_printk(TPACPI_DBG_RFKILL,
1219 "request to change radio state to %s\n",
1220 blocked ? "blocked" : "unblocked");
1221
1222 /* try to set radio state */
1223 res = (tp_rfk->ops->set_status)(blocked ?
1224 TPACPI_RFK_RADIO_OFF : TPACPI_RFK_RADIO_ON);
1225
1226 /* and update the rfkill core with whatever the FW really did */
1227 tpacpi_rfk_update_swstate(tp_rfk);
1228
1229 return (res < 0) ? res : 0;
1230 }
1231
1232 static const struct rfkill_ops tpacpi_rfk_rfkill_ops = {
1233 .set_block = tpacpi_rfk_hook_set_block,
1234 };
1235
1236 static int __init tpacpi_new_rfkill(const enum tpacpi_rfk_id id,
1237 const struct tpacpi_rfk_ops *tp_rfkops,
1238 const enum rfkill_type rfktype,
1239 const char *name,
1240 const bool set_default)
1241 {
1242 struct tpacpi_rfk *atp_rfk;
1243 int res;
1244 bool sw_state = false;
1245 bool hw_state;
1246 int sw_status;
1247
1248 BUG_ON(id >= TPACPI_RFK_SW_MAX || tpacpi_rfkill_switches[id]);
1249
1250 atp_rfk = kzalloc(sizeof(struct tpacpi_rfk), GFP_KERNEL);
1251 if (atp_rfk)
1252 atp_rfk->rfkill = rfkill_alloc(name,
1253 &tpacpi_pdev->dev,
1254 rfktype,
1255 &tpacpi_rfk_rfkill_ops,
1256 atp_rfk);
1257 if (!atp_rfk || !atp_rfk->rfkill) {
1258 pr_err("failed to allocate memory for rfkill class\n");
1259 kfree(atp_rfk);
1260 return -ENOMEM;
1261 }
1262
1263 atp_rfk->id = id;
1264 atp_rfk->ops = tp_rfkops;
1265
1266 sw_status = (tp_rfkops->get_status)();
1267 if (sw_status < 0) {
1268 pr_err("failed to read initial state for %s, error %d\n",
1269 name, sw_status);
1270 } else {
1271 sw_state = (sw_status == TPACPI_RFK_RADIO_OFF);
1272 if (set_default) {
1273 /* try to keep the initial state, since we ask the
1274 * firmware to preserve it across S5 in NVRAM */
1275 rfkill_init_sw_state(atp_rfk->rfkill, sw_state);
1276 }
1277 }
1278 hw_state = tpacpi_rfk_check_hwblock_state();
1279 rfkill_set_hw_state(atp_rfk->rfkill, hw_state);
1280
1281 res = rfkill_register(atp_rfk->rfkill);
1282 if (res < 0) {
1283 pr_err("failed to register %s rfkill switch: %d\n", name, res);
1284 rfkill_destroy(atp_rfk->rfkill);
1285 kfree(atp_rfk);
1286 return res;
1287 }
1288
1289 tpacpi_rfkill_switches[id] = atp_rfk;
1290
1291 pr_info("rfkill switch %s: radio is %sblocked\n",
1292 name, (sw_state || hw_state) ? "" : "un");
1293 return 0;
1294 }
1295
1296 static void tpacpi_destroy_rfkill(const enum tpacpi_rfk_id id)
1297 {
1298 struct tpacpi_rfk *tp_rfk;
1299
1300 BUG_ON(id >= TPACPI_RFK_SW_MAX);
1301
1302 tp_rfk = tpacpi_rfkill_switches[id];
1303 if (tp_rfk) {
1304 rfkill_unregister(tp_rfk->rfkill);
1305 rfkill_destroy(tp_rfk->rfkill);
1306 tpacpi_rfkill_switches[id] = NULL;
1307 kfree(tp_rfk);
1308 }
1309 }
1310
1311 static void printk_deprecated_rfkill_attribute(const char * const what)
1312 {
1313 printk_deprecated_attribute(what,
1314 "Please switch to generic rfkill before year 2010");
1315 }
1316
1317 /* sysfs <radio> enable ------------------------------------------------ */
1318 static ssize_t tpacpi_rfk_sysfs_enable_show(const enum tpacpi_rfk_id id,
1319 struct device_attribute *attr,
1320 char *buf)
1321 {
1322 int status;
1323
1324 printk_deprecated_rfkill_attribute(attr->attr.name);
1325
1326 /* This is in the ABI... */
1327 if (tpacpi_rfk_check_hwblock_state()) {
1328 status = TPACPI_RFK_RADIO_OFF;
1329 } else {
1330 status = tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]);
1331 if (status < 0)
1332 return status;
1333 }
1334
1335 return snprintf(buf, PAGE_SIZE, "%d\n",
1336 (status == TPACPI_RFK_RADIO_ON) ? 1 : 0);
1337 }
1338
1339 static ssize_t tpacpi_rfk_sysfs_enable_store(const enum tpacpi_rfk_id id,
1340 struct device_attribute *attr,
1341 const char *buf, size_t count)
1342 {
1343 unsigned long t;
1344 int res;
1345
1346 printk_deprecated_rfkill_attribute(attr->attr.name);
1347
1348 if (parse_strtoul(buf, 1, &t))
1349 return -EINVAL;
1350
1351 tpacpi_disclose_usertask(attr->attr.name, "set to %ld\n", t);
1352
1353 /* This is in the ABI... */
1354 if (tpacpi_rfk_check_hwblock_state() && !!t)
1355 return -EPERM;
1356
1357 res = tpacpi_rfkill_switches[id]->ops->set_status((!!t) ?
1358 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF);
1359 tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]);
1360
1361 return (res < 0) ? res : count;
1362 }
1363
1364 /* procfs -------------------------------------------------------------- */
1365 static int tpacpi_rfk_procfs_read(const enum tpacpi_rfk_id id, struct seq_file *m)
1366 {
1367 if (id >= TPACPI_RFK_SW_MAX)
1368 seq_printf(m, "status:\t\tnot supported\n");
1369 else {
1370 int status;
1371
1372 /* This is in the ABI... */
1373 if (tpacpi_rfk_check_hwblock_state()) {
1374 status = TPACPI_RFK_RADIO_OFF;
1375 } else {
1376 status = tpacpi_rfk_update_swstate(
1377 tpacpi_rfkill_switches[id]);
1378 if (status < 0)
1379 return status;
1380 }
1381
1382 seq_printf(m, "status:\t\t%s\n",
1383 (status == TPACPI_RFK_RADIO_ON) ?
1384 "enabled" : "disabled");
1385 seq_printf(m, "commands:\tenable, disable\n");
1386 }
1387
1388 return 0;
1389 }
1390
1391 static int tpacpi_rfk_procfs_write(const enum tpacpi_rfk_id id, char *buf)
1392 {
1393 char *cmd;
1394 int status = -1;
1395 int res = 0;
1396
1397 if (id >= TPACPI_RFK_SW_MAX)
1398 return -ENODEV;
1399
1400 while ((cmd = next_cmd(&buf))) {
1401 if (strlencmp(cmd, "enable") == 0)
1402 status = TPACPI_RFK_RADIO_ON;
1403 else if (strlencmp(cmd, "disable") == 0)
1404 status = TPACPI_RFK_RADIO_OFF;
1405 else
1406 return -EINVAL;
1407 }
1408
1409 if (status != -1) {
1410 tpacpi_disclose_usertask("procfs", "attempt to %s %s\n",
1411 (status == TPACPI_RFK_RADIO_ON) ?
1412 "enable" : "disable",
1413 tpacpi_rfkill_names[id]);
1414 res = (tpacpi_rfkill_switches[id]->ops->set_status)(status);
1415 tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]);
1416 }
1417
1418 return res;
1419 }
1420
1421 /*************************************************************************
1422 * thinkpad-acpi driver attributes
1423 */
1424
1425 /* interface_version --------------------------------------------------- */
1426 static ssize_t tpacpi_driver_interface_version_show(
1427 struct device_driver *drv,
1428 char *buf)
1429 {
1430 return snprintf(buf, PAGE_SIZE, "0x%08x\n", TPACPI_SYSFS_VERSION);
1431 }
1432
1433 static DRIVER_ATTR(interface_version, S_IRUGO,
1434 tpacpi_driver_interface_version_show, NULL);
1435
1436 /* debug_level --------------------------------------------------------- */
1437 static ssize_t tpacpi_driver_debug_show(struct device_driver *drv,
1438 char *buf)
1439 {
1440 return snprintf(buf, PAGE_SIZE, "0x%04x\n", dbg_level);
1441 }
1442
1443 static ssize_t tpacpi_driver_debug_store(struct device_driver *drv,
1444 const char *buf, size_t count)
1445 {
1446 unsigned long t;
1447
1448 if (parse_strtoul(buf, 0xffff, &t))
1449 return -EINVAL;
1450
1451 dbg_level = t;
1452
1453 return count;
1454 }
1455
1456 static DRIVER_ATTR(debug_level, S_IWUSR | S_IRUGO,
1457 tpacpi_driver_debug_show, tpacpi_driver_debug_store);
1458
1459 /* version ------------------------------------------------------------- */
1460 static ssize_t tpacpi_driver_version_show(struct device_driver *drv,
1461 char *buf)
1462 {
1463 return snprintf(buf, PAGE_SIZE, "%s v%s\n",
1464 TPACPI_DESC, TPACPI_VERSION);
1465 }
1466
1467 static DRIVER_ATTR(version, S_IRUGO,
1468 tpacpi_driver_version_show, NULL);
1469
1470 /* --------------------------------------------------------------------- */
1471
1472 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
1473
1474 /* wlsw_emulstate ------------------------------------------------------ */
1475 static ssize_t tpacpi_driver_wlsw_emulstate_show(struct device_driver *drv,
1476 char *buf)
1477 {
1478 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_wlsw_emulstate);
1479 }
1480
1481 static ssize_t tpacpi_driver_wlsw_emulstate_store(struct device_driver *drv,
1482 const char *buf, size_t count)
1483 {
1484 unsigned long t;
1485
1486 if (parse_strtoul(buf, 1, &t))
1487 return -EINVAL;
1488
1489 if (tpacpi_wlsw_emulstate != !!t) {
1490 tpacpi_wlsw_emulstate = !!t;
1491 tpacpi_rfk_update_hwblock_state(!t); /* negative logic */
1492 }
1493
1494 return count;
1495 }
1496
1497 static DRIVER_ATTR(wlsw_emulstate, S_IWUSR | S_IRUGO,
1498 tpacpi_driver_wlsw_emulstate_show,
1499 tpacpi_driver_wlsw_emulstate_store);
1500
1501 /* bluetooth_emulstate ------------------------------------------------- */
1502 static ssize_t tpacpi_driver_bluetooth_emulstate_show(
1503 struct device_driver *drv,
1504 char *buf)
1505 {
1506 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_bluetooth_emulstate);
1507 }
1508
1509 static ssize_t tpacpi_driver_bluetooth_emulstate_store(
1510 struct device_driver *drv,
1511 const char *buf, size_t count)
1512 {
1513 unsigned long t;
1514
1515 if (parse_strtoul(buf, 1, &t))
1516 return -EINVAL;
1517
1518 tpacpi_bluetooth_emulstate = !!t;
1519
1520 return count;
1521 }
1522
1523 static DRIVER_ATTR(bluetooth_emulstate, S_IWUSR | S_IRUGO,
1524 tpacpi_driver_bluetooth_emulstate_show,
1525 tpacpi_driver_bluetooth_emulstate_store);
1526
1527 /* wwan_emulstate ------------------------------------------------- */
1528 static ssize_t tpacpi_driver_wwan_emulstate_show(
1529 struct device_driver *drv,
1530 char *buf)
1531 {
1532 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_wwan_emulstate);
1533 }
1534
1535 static ssize_t tpacpi_driver_wwan_emulstate_store(
1536 struct device_driver *drv,
1537 const char *buf, size_t count)
1538 {
1539 unsigned long t;
1540
1541 if (parse_strtoul(buf, 1, &t))
1542 return -EINVAL;
1543
1544 tpacpi_wwan_emulstate = !!t;
1545
1546 return count;
1547 }
1548
1549 static DRIVER_ATTR(wwan_emulstate, S_IWUSR | S_IRUGO,
1550 tpacpi_driver_wwan_emulstate_show,
1551 tpacpi_driver_wwan_emulstate_store);
1552
1553 /* uwb_emulstate ------------------------------------------------- */
1554 static ssize_t tpacpi_driver_uwb_emulstate_show(
1555 struct device_driver *drv,
1556 char *buf)
1557 {
1558 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_uwb_emulstate);
1559 }
1560
1561 static ssize_t tpacpi_driver_uwb_emulstate_store(
1562 struct device_driver *drv,
1563 const char *buf, size_t count)
1564 {
1565 unsigned long t;
1566
1567 if (parse_strtoul(buf, 1, &t))
1568 return -EINVAL;
1569
1570 tpacpi_uwb_emulstate = !!t;
1571
1572 return count;
1573 }
1574
1575 static DRIVER_ATTR(uwb_emulstate, S_IWUSR | S_IRUGO,
1576 tpacpi_driver_uwb_emulstate_show,
1577 tpacpi_driver_uwb_emulstate_store);
1578 #endif
1579
1580 /* --------------------------------------------------------------------- */
1581
1582 static struct driver_attribute *tpacpi_driver_attributes[] = {
1583 &driver_attr_debug_level, &driver_attr_version,
1584 &driver_attr_interface_version,
1585 };
1586
1587 static int __init tpacpi_create_driver_attributes(struct device_driver *drv)
1588 {
1589 int i, res;
1590
1591 i = 0;
1592 res = 0;
1593 while (!res && i < ARRAY_SIZE(tpacpi_driver_attributes)) {
1594 res = driver_create_file(drv, tpacpi_driver_attributes[i]);
1595 i++;
1596 }
1597
1598 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
1599 if (!res && dbg_wlswemul)
1600 res = driver_create_file(drv, &driver_attr_wlsw_emulstate);
1601 if (!res && dbg_bluetoothemul)
1602 res = driver_create_file(drv, &driver_attr_bluetooth_emulstate);
1603 if (!res && dbg_wwanemul)
1604 res = driver_create_file(drv, &driver_attr_wwan_emulstate);
1605 if (!res && dbg_uwbemul)
1606 res = driver_create_file(drv, &driver_attr_uwb_emulstate);
1607 #endif
1608
1609 return res;
1610 }
1611
1612 static void tpacpi_remove_driver_attributes(struct device_driver *drv)
1613 {
1614 int i;
1615
1616 for (i = 0; i < ARRAY_SIZE(tpacpi_driver_attributes); i++)
1617 driver_remove_file(drv, tpacpi_driver_attributes[i]);
1618
1619 #ifdef THINKPAD_ACPI_DEBUGFACILITIES
1620 driver_remove_file(drv, &driver_attr_wlsw_emulstate);
1621 driver_remove_file(drv, &driver_attr_bluetooth_emulstate);
1622 driver_remove_file(drv, &driver_attr_wwan_emulstate);
1623 driver_remove_file(drv, &driver_attr_uwb_emulstate);
1624 #endif
1625 }
1626
1627 /*************************************************************************
1628 * Firmware Data
1629 */
1630
1631 /*
1632 * Table of recommended minimum BIOS versions
1633 *
1634 * Reasons for listing:
1635 * 1. Stable BIOS, listed because the unknown amount of
1636 * bugs and bad ACPI behaviour on older versions
1637 *
1638 * 2. BIOS or EC fw with known bugs that trigger on Linux
1639 *
1640 * 3. BIOS with known reduced functionality in older versions
1641 *
1642 * We recommend the latest BIOS and EC version.
1643 * We only support the latest BIOS and EC fw version as a rule.
1644 *
1645 * Sources: IBM ThinkPad Public Web Documents (update changelogs),
1646 * Information from users in ThinkWiki
1647 *
1648 * WARNING: we use this table also to detect that the machine is
1649 * a ThinkPad in some cases, so don't remove entries lightly.
1650 */
1651
1652 #define TPV_Q(__v, __id1, __id2, __bv1, __bv2) \
1653 { .vendor = (__v), \
1654 .bios = TPID(__id1, __id2), \
1655 .ec = TPACPI_MATCH_ANY, \
1656 .quirks = TPACPI_MATCH_ANY << 16 \
1657 | (__bv1) << 8 | (__bv2) }
1658
1659 #define TPV_Q_X(__v, __bid1, __bid2, __bv1, __bv2, \
1660 __eid, __ev1, __ev2) \
1661 { .vendor = (__v), \
1662 .bios = TPID(__bid1, __bid2), \
1663 .ec = __eid, \
1664 .quirks = (__ev1) << 24 | (__ev2) << 16 \
1665 | (__bv1) << 8 | (__bv2) }
1666
1667 #define TPV_QI0(__id1, __id2, __bv1, __bv2) \
1668 TPV_Q(PCI_VENDOR_ID_IBM, __id1, __id2, __bv1, __bv2)
1669
1670 /* Outdated IBM BIOSes often lack the EC id string */
1671 #define TPV_QI1(__id1, __id2, __bv1, __bv2, __ev1, __ev2) \
1672 TPV_Q_X(PCI_VENDOR_ID_IBM, __id1, __id2, \
1673 __bv1, __bv2, TPID(__id1, __id2), \
1674 __ev1, __ev2), \
1675 TPV_Q_X(PCI_VENDOR_ID_IBM, __id1, __id2, \
1676 __bv1, __bv2, TPACPI_MATCH_UNKNOWN, \
1677 __ev1, __ev2)
1678
1679 /* Outdated IBM BIOSes often lack the EC id string */
1680 #define TPV_QI2(__bid1, __bid2, __bv1, __bv2, \
1681 __eid1, __eid2, __ev1, __ev2) \
1682 TPV_Q_X(PCI_VENDOR_ID_IBM, __bid1, __bid2, \
1683 __bv1, __bv2, TPID(__eid1, __eid2), \
1684 __ev1, __ev2), \
1685 TPV_Q_X(PCI_VENDOR_ID_IBM, __bid1, __bid2, \
1686 __bv1, __bv2, TPACPI_MATCH_UNKNOWN, \
1687 __ev1, __ev2)
1688
1689 #define TPV_QL0(__id1, __id2, __bv1, __bv2) \
1690 TPV_Q(PCI_VENDOR_ID_LENOVO, __id1, __id2, __bv1, __bv2)
1691
1692 #define TPV_QL1(__id1, __id2, __bv1, __bv2, __ev1, __ev2) \
1693 TPV_Q_X(PCI_VENDOR_ID_LENOVO, __id1, __id2, \
1694 __bv1, __bv2, TPID(__id1, __id2), \
1695 __ev1, __ev2)
1696
1697 #define TPV_QL2(__bid1, __bid2, __bv1, __bv2, \
1698 __eid1, __eid2, __ev1, __ev2) \
1699 TPV_Q_X(PCI_VENDOR_ID_LENOVO, __bid1, __bid2, \
1700 __bv1, __bv2, TPID(__eid1, __eid2), \
1701 __ev1, __ev2)
1702
1703 static const struct tpacpi_quirk tpacpi_bios_version_qtable[] __initconst = {
1704 /* Numeric models ------------------ */
1705 /* FW MODEL BIOS VERS */
1706 TPV_QI0('I', 'M', '6', '5'), /* 570 */
1707 TPV_QI0('I', 'U', '2', '6'), /* 570E */
1708 TPV_QI0('I', 'B', '5', '4'), /* 600 */
1709 TPV_QI0('I', 'H', '4', '7'), /* 600E */
1710 TPV_QI0('I', 'N', '3', '6'), /* 600E */
1711 TPV_QI0('I', 'T', '5', '5'), /* 600X */
1712 TPV_QI0('I', 'D', '4', '8'), /* 770, 770E, 770ED */
1713 TPV_QI0('I', 'I', '4', '2'), /* 770X */
1714 TPV_QI0('I', 'O', '2', '3'), /* 770Z */
1715
1716 /* A-series ------------------------- */
1717 /* FW MODEL BIOS VERS EC VERS */
1718 TPV_QI0('I', 'W', '5', '9'), /* A20m */
1719 TPV_QI0('I', 'V', '6', '9'), /* A20p */
1720 TPV_QI0('1', '0', '2', '6'), /* A21e, A22e */
1721 TPV_QI0('K', 'U', '3', '6'), /* A21e */
1722 TPV_QI0('K', 'X', '3', '6'), /* A21m, A22m */
1723 TPV_QI0('K', 'Y', '3', '8'), /* A21p, A22p */
1724 TPV_QI0('1', 'B', '1', '7'), /* A22e */
1725 TPV_QI0('1', '3', '2', '0'), /* A22m */
1726 TPV_QI0('1', 'E', '7', '3'), /* A30/p (0) */
1727 TPV_QI1('1', 'G', '4', '1', '1', '7'), /* A31/p (0) */
1728 TPV_QI1('1', 'N', '1', '6', '0', '7'), /* A31/p (0) */
1729
1730 /* G-series ------------------------- */
1731 /* FW MODEL BIOS VERS */
1732 TPV_QI0('1', 'T', 'A', '6'), /* G40 */
1733 TPV_QI0('1', 'X', '5', '7'), /* G41 */
1734
1735 /* R-series, T-series --------------- */
1736 /* FW MODEL BIOS VERS EC VERS */
1737 TPV_QI0('1', 'C', 'F', '0'), /* R30 */
1738 TPV_QI0('1', 'F', 'F', '1'), /* R31 */
1739 TPV_QI0('1', 'M', '9', '7'), /* R32 */
1740 TPV_QI0('1', 'O', '6', '1'), /* R40 */
1741 TPV_QI0('1', 'P', '6', '5'), /* R40 */
1742 TPV_QI0('1', 'S', '7', '0'), /* R40e */
1743 TPV_QI1('1', 'R', 'D', 'R', '7', '1'), /* R50/p, R51,
1744 T40/p, T41/p, T42/p (1) */
1745 TPV_QI1('1', 'V', '7', '1', '2', '8'), /* R50e, R51 (1) */
1746 TPV_QI1('7', '8', '7', '1', '0', '6'), /* R51e (1) */
1747 TPV_QI1('7', '6', '6', '9', '1', '6'), /* R52 (1) */
1748 TPV_QI1('7', '0', '6', '9', '2', '8'), /* R52, T43 (1) */
1749
1750 TPV_QI0('I', 'Y', '6', '1'), /* T20 */
1751 TPV_QI0('K', 'Z', '3', '4'), /* T21 */
1752 TPV_QI0('1', '6', '3', '2'), /* T22 */
1753 TPV_QI1('1', 'A', '6', '4', '2', '3'), /* T23 (0) */
1754 TPV_QI1('1', 'I', '7', '1', '2', '0'), /* T30 (0) */
1755 TPV_QI1('1', 'Y', '6', '5', '2', '9'), /* T43/p (1) */
1756
1757 TPV_QL1('7', '9', 'E', '3', '5', '0'), /* T60/p */
1758 TPV_QL1('7', 'C', 'D', '2', '2', '2'), /* R60, R60i */
1759 TPV_QL1('7', 'E', 'D', '0', '1', '5'), /* R60e, R60i */
1760
1761 /* BIOS FW BIOS VERS EC FW EC VERS */
1762 TPV_QI2('1', 'W', '9', '0', '1', 'V', '2', '8'), /* R50e (1) */
1763 TPV_QL2('7', 'I', '3', '4', '7', '9', '5', '0'), /* T60/p wide */
1764
1765 /* X-series ------------------------- */
1766 /* FW MODEL BIOS VERS EC VERS */
1767 TPV_QI0('I', 'Z', '9', 'D'), /* X20, X21 */
1768 TPV_QI0('1', 'D', '7', '0'), /* X22, X23, X24 */
1769 TPV_QI1('1', 'K', '4', '8', '1', '8'), /* X30 (0) */
1770 TPV_QI1('1', 'Q', '9', '7', '2', '3'), /* X31, X32 (0) */
1771 TPV_QI1('1', 'U', 'D', '3', 'B', '2'), /* X40 (0) */
1772 TPV_QI1('7', '4', '6', '4', '2', '7'), /* X41 (0) */
1773 TPV_QI1('7', '5', '6', '0', '2', '0'), /* X41t (0) */
1774
1775 TPV_QL1('7', 'B', 'D', '7', '4', '0'), /* X60/s */
1776 TPV_QL1('7', 'J', '3', '0', '1', '3'), /* X60t */
1777
1778 /* (0) - older versions lack DMI EC fw string and functionality */
1779 /* (1) - older versions known to lack functionality */
1780 };
1781
1782 #undef TPV_QL1
1783 #undef TPV_QL0
1784 #undef TPV_QI2
1785 #undef TPV_QI1
1786 #undef TPV_QI0
1787 #undef TPV_Q_X
1788 #undef TPV_Q
1789
1790 static void __init tpacpi_check_outdated_fw(void)
1791 {
1792 unsigned long fwvers;
1793 u16 ec_version, bios_version;
1794
1795 fwvers = tpacpi_check_quirks(tpacpi_bios_version_qtable,
1796 ARRAY_SIZE(tpacpi_bios_version_qtable));
1797
1798 if (!fwvers)
1799 return;
1800
1801 bios_version = fwvers & 0xffffU;
1802 ec_version = (fwvers >> 16) & 0xffffU;
1803
1804 /* note that unknown versions are set to 0x0000 and we use that */
1805 if ((bios_version > thinkpad_id.bios_release) ||
1806 (ec_version > thinkpad_id.ec_release &&
1807 ec_version != TPACPI_MATCH_ANY)) {
1808 /*
1809 * The changelogs would let us track down the exact
1810 * reason, but it is just too much of a pain to track
1811 * it. We only list BIOSes that are either really
1812 * broken, or really stable to begin with, so it is
1813 * best if the user upgrades the firmware anyway.
1814 */
1815 pr_warn("WARNING: Outdated ThinkPad BIOS/EC firmware\n");
1816 pr_warn("WARNING: This firmware may be missing critical bug "
1817 "fixes and/or important features\n");
1818 }
1819 }
1820
1821 static bool __init tpacpi_is_fw_known(void)
1822 {
1823 return tpacpi_check_quirks(tpacpi_bios_version_qtable,
1824 ARRAY_SIZE(tpacpi_bios_version_qtable)) != 0;
1825 }
1826
1827 /****************************************************************************
1828 ****************************************************************************
1829 *
1830 * Subdrivers
1831 *
1832 ****************************************************************************
1833 ****************************************************************************/
1834
1835 /*************************************************************************
1836 * thinkpad-acpi metadata subdriver
1837 */
1838
1839 static int thinkpad_acpi_driver_read(struct seq_file *m)
1840 {
1841 seq_printf(m, "driver:\t\t%s\n", TPACPI_DESC);
1842 seq_printf(m, "version:\t%s\n", TPACPI_VERSION);
1843 return 0;
1844 }
1845
1846 static struct ibm_struct thinkpad_acpi_driver_data = {
1847 .name = "driver",
1848 .read = thinkpad_acpi_driver_read,
1849 };
1850
1851 /*************************************************************************
1852 * Hotkey subdriver
1853 */
1854
1855 /*
1856 * ThinkPad firmware event model
1857 *
1858 * The ThinkPad firmware has two main event interfaces: normal ACPI
1859 * notifications (which follow the ACPI standard), and a private event
1860 * interface.
1861 *
1862 * The private event interface also issues events for the hotkeys. As
1863 * the driver gained features, the event handling code ended up being
1864 * built around the hotkey subdriver. This will need to be refactored
1865 * to a more formal event API eventually.
1866 *
1867 * Some "hotkeys" are actually supposed to be used as event reports,
1868 * such as "brightness has changed", "volume has changed", depending on
1869 * the ThinkPad model and how the firmware is operating.
1870 *
1871 * Unlike other classes, hotkey-class events have mask/unmask control on
1872 * non-ancient firmware. However, how it behaves changes a lot with the
1873 * firmware model and version.
1874 */
1875
1876 enum { /* hot key scan codes (derived from ACPI DSDT) */
1877 TP_ACPI_HOTKEYSCAN_FNF1 = 0,
1878 TP_ACPI_HOTKEYSCAN_FNF2,
1879 TP_ACPI_HOTKEYSCAN_FNF3,
1880 TP_ACPI_HOTKEYSCAN_FNF4,
1881 TP_ACPI_HOTKEYSCAN_FNF5,
1882 TP_ACPI_HOTKEYSCAN_FNF6,
1883 TP_ACPI_HOTKEYSCAN_FNF7,
1884 TP_ACPI_HOTKEYSCAN_FNF8,
1885 TP_ACPI_HOTKEYSCAN_FNF9,
1886 TP_ACPI_HOTKEYSCAN_FNF10,
1887 TP_ACPI_HOTKEYSCAN_FNF11,
1888 TP_ACPI_HOTKEYSCAN_FNF12,
1889 TP_ACPI_HOTKEYSCAN_FNBACKSPACE,
1890 TP_ACPI_HOTKEYSCAN_FNINSERT,
1891 TP_ACPI_HOTKEYSCAN_FNDELETE,
1892 TP_ACPI_HOTKEYSCAN_FNHOME,
1893 TP_ACPI_HOTKEYSCAN_FNEND,
1894 TP_ACPI_HOTKEYSCAN_FNPAGEUP,
1895 TP_ACPI_HOTKEYSCAN_FNPAGEDOWN,
1896 TP_ACPI_HOTKEYSCAN_FNSPACE,
1897 TP_ACPI_HOTKEYSCAN_VOLUMEUP,
1898 TP_ACPI_HOTKEYSCAN_VOLUMEDOWN,
1899 TP_ACPI_HOTKEYSCAN_MUTE,
1900 TP_ACPI_HOTKEYSCAN_THINKPAD,
1901 TP_ACPI_HOTKEYSCAN_UNK1,
1902 TP_ACPI_HOTKEYSCAN_UNK2,
1903 TP_ACPI_HOTKEYSCAN_UNK3,
1904 TP_ACPI_HOTKEYSCAN_UNK4,
1905 TP_ACPI_HOTKEYSCAN_UNK5,
1906 TP_ACPI_HOTKEYSCAN_UNK6,
1907 TP_ACPI_HOTKEYSCAN_UNK7,
1908 TP_ACPI_HOTKEYSCAN_UNK8,
1909
1910 /* Hotkey keymap size */
1911 TPACPI_HOTKEY_MAP_LEN
1912 };
1913
1914 enum { /* Keys/events available through NVRAM polling */
1915 TPACPI_HKEY_NVRAM_KNOWN_MASK = 0x00fb88c0U,
1916 TPACPI_HKEY_NVRAM_GOOD_MASK = 0x00fb8000U,
1917 };
1918
1919 enum { /* Positions of some of the keys in hotkey masks */
1920 TP_ACPI_HKEY_DISPSWTCH_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF7,
1921 TP_ACPI_HKEY_DISPXPAND_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF8,
1922 TP_ACPI_HKEY_HIBERNATE_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF12,
1923 TP_ACPI_HKEY_BRGHTUP_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNHOME,
1924 TP_ACPI_HKEY_BRGHTDWN_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNEND,
1925 TP_ACPI_HKEY_THNKLGHT_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNPAGEUP,
1926 TP_ACPI_HKEY_ZOOM_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNSPACE,
1927 TP_ACPI_HKEY_VOLUP_MASK = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEUP,
1928 TP_ACPI_HKEY_VOLDWN_MASK = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEDOWN,
1929 TP_ACPI_HKEY_MUTE_MASK = 1 << TP_ACPI_HOTKEYSCAN_MUTE,
1930 TP_ACPI_HKEY_THINKPAD_MASK = 1 << TP_ACPI_HOTKEYSCAN_THINKPAD,
1931 };
1932
1933 enum { /* NVRAM to ACPI HKEY group map */
1934 TP_NVRAM_HKEY_GROUP_HK2 = TP_ACPI_HKEY_THINKPAD_MASK |
1935 TP_ACPI_HKEY_ZOOM_MASK |
1936 TP_ACPI_HKEY_DISPSWTCH_MASK |
1937 TP_ACPI_HKEY_HIBERNATE_MASK,
1938 TP_NVRAM_HKEY_GROUP_BRIGHTNESS = TP_ACPI_HKEY_BRGHTUP_MASK |
1939 TP_ACPI_HKEY_BRGHTDWN_MASK,
1940 TP_NVRAM_HKEY_GROUP_VOLUME = TP_ACPI_HKEY_VOLUP_MASK |
1941 TP_ACPI_HKEY_VOLDWN_MASK |
1942 TP_ACPI_HKEY_MUTE_MASK,
1943 };
1944
1945 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1946 struct tp_nvram_state {
1947 u16 thinkpad_toggle:1;
1948 u16 zoom_toggle:1;
1949 u16 display_toggle:1;
1950 u16 thinklight_toggle:1;
1951 u16 hibernate_toggle:1;
1952 u16 displayexp_toggle:1;
1953 u16 display_state:1;
1954 u16 brightness_toggle:1;
1955 u16 volume_toggle:1;
1956 u16 mute:1;
1957
1958 u8 brightness_level;
1959 u8 volume_level;
1960 };
1961
1962 /* kthread for the hotkey poller */
1963 static struct task_struct *tpacpi_hotkey_task;
1964
1965 /* Acquired while the poller kthread is running, use to sync start/stop */
1966 static struct mutex hotkey_thread_mutex;
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 unsigned int hotkey_report_mode;
2027
2028 static u16 *hotkey_keycode_map;
2029
2030 static struct attribute_set *hotkey_dev_attributes;
2031
2032 static void tpacpi_driver_event(const unsigned int hkey_event);
2033 static void hotkey_driver_event(const unsigned int scancode);
2034 static void hotkey_poll_setup(const bool may_warn);
2035
2036 /* HKEY.MHKG() return bits */
2037 #define TP_HOTKEY_TABLET_MASK (1 << 3)
2038
2039 static int hotkey_get_wlsw(void)
2040 {
2041 int status;
2042
2043 if (!tp_features.hotkey_wlsw)
2044 return -ENODEV;
2045
2046 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
2047 if (dbg_wlswemul)
2048 return (tpacpi_wlsw_emulstate) ?
2049 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
2050 #endif
2051
2052 if (!acpi_evalf(hkey_handle, &status, "WLSW", "d"))
2053 return -EIO;
2054
2055 return (status) ? TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
2056 }
2057
2058 static int hotkey_get_tablet_mode(int *status)
2059 {
2060 int s;
2061
2062 if (!acpi_evalf(hkey_handle, &s, "MHKG", "d"))
2063 return -EIO;
2064
2065 *status = ((s & TP_HOTKEY_TABLET_MASK) != 0);
2066 return 0;
2067 }
2068
2069 /*
2070 * Reads current event mask from firmware, and updates
2071 * hotkey_acpi_mask accordingly. Also resets any bits
2072 * from hotkey_user_mask that are unavailable to be
2073 * delivered (shadow requirement of the userspace ABI).
2074 *
2075 * Call with hotkey_mutex held
2076 */
2077 static int hotkey_mask_get(void)
2078 {
2079 if (tp_features.hotkey_mask) {
2080 u32 m = 0;
2081
2082 if (!acpi_evalf(hkey_handle, &m, "DHKN", "d"))
2083 return -EIO;
2084
2085 hotkey_acpi_mask = m;
2086 } else {
2087 /* no mask support doesn't mean no event support... */
2088 hotkey_acpi_mask = hotkey_all_mask;
2089 }
2090
2091 /* sync userspace-visible mask */
2092 hotkey_user_mask &= (hotkey_acpi_mask | hotkey_source_mask);
2093
2094 return 0;
2095 }
2096
2097 void static hotkey_mask_warn_incomplete_mask(void)
2098 {
2099 /* log only what the user can fix... */
2100 const u32 wantedmask = hotkey_driver_mask &
2101 ~(hotkey_acpi_mask | hotkey_source_mask) &
2102 (hotkey_all_mask | TPACPI_HKEY_NVRAM_KNOWN_MASK);
2103
2104 if (wantedmask)
2105 pr_notice("required events 0x%08x not enabled!\n", wantedmask);
2106 }
2107
2108 /*
2109 * Set the firmware mask when supported
2110 *
2111 * Also calls hotkey_mask_get to update hotkey_acpi_mask.
2112 *
2113 * NOTE: does not set bits in hotkey_user_mask, but may reset them.
2114 *
2115 * Call with hotkey_mutex held
2116 */
2117 static int hotkey_mask_set(u32 mask)
2118 {
2119 int i;
2120 int rc = 0;
2121
2122 const u32 fwmask = mask & ~hotkey_source_mask;
2123
2124 if (tp_features.hotkey_mask) {
2125 for (i = 0; i < 32; i++) {
2126 if (!acpi_evalf(hkey_handle,
2127 NULL, "MHKM", "vdd", i + 1,
2128 !!(mask & (1 << i)))) {
2129 rc = -EIO;
2130 break;
2131 }
2132 }
2133 }
2134
2135 /*
2136 * We *must* make an inconditional call to hotkey_mask_get to
2137 * refresh hotkey_acpi_mask and update hotkey_user_mask
2138 *
2139 * Take the opportunity to also log when we cannot _enable_
2140 * a given event.
2141 */
2142 if (!hotkey_mask_get() && !rc && (fwmask & ~hotkey_acpi_mask)) {
2143 pr_notice("asked for hotkey mask 0x%08x, but "
2144 "firmware forced it to 0x%08x\n",
2145 fwmask, hotkey_acpi_mask);
2146 }
2147
2148 if (tpacpi_lifecycle != TPACPI_LIFE_EXITING)
2149 hotkey_mask_warn_incomplete_mask();
2150
2151 return rc;
2152 }
2153
2154 /*
2155 * Sets hotkey_user_mask and tries to set the firmware mask
2156 *
2157 * Call with hotkey_mutex held
2158 */
2159 static int hotkey_user_mask_set(const u32 mask)
2160 {
2161 int rc;
2162
2163 /* Give people a chance to notice they are doing something that
2164 * is bound to go boom on their users sooner or later */
2165 if (!tp_warned.hotkey_mask_ff &&
2166 (mask == 0xffff || mask == 0xffffff ||
2167 mask == 0xffffffff)) {
2168 tp_warned.hotkey_mask_ff = 1;
2169 pr_notice("setting the hotkey mask to 0x%08x is likely "
2170 "not the best way to go about it\n", mask);
2171 pr_notice("please consider using the driver defaults, "
2172 "and refer to up-to-date thinkpad-acpi "
2173 "documentation\n");
2174 }
2175
2176 /* Try to enable what the user asked for, plus whatever we need.
2177 * this syncs everything but won't enable bits in hotkey_user_mask */
2178 rc = hotkey_mask_set((mask | hotkey_driver_mask) & ~hotkey_source_mask);
2179
2180 /* Enable the available bits in hotkey_user_mask */
2181 hotkey_user_mask = mask & (hotkey_acpi_mask | hotkey_source_mask);
2182
2183 return rc;
2184 }
2185
2186 /*
2187 * Sets the driver hotkey mask.
2188 *
2189 * Can be called even if the hotkey subdriver is inactive
2190 */
2191 static int tpacpi_hotkey_driver_mask_set(const u32 mask)
2192 {
2193 int rc;
2194
2195 /* Do the right thing if hotkey_init has not been called yet */
2196 if (!tp_features.hotkey) {
2197 hotkey_driver_mask = mask;
2198 return 0;
2199 }
2200
2201 mutex_lock(&hotkey_mutex);
2202
2203 HOTKEY_CONFIG_CRITICAL_START
2204 hotkey_driver_mask = mask;
2205 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2206 hotkey_source_mask |= (mask & ~hotkey_all_mask);
2207 #endif
2208 HOTKEY_CONFIG_CRITICAL_END
2209
2210 rc = hotkey_mask_set((hotkey_acpi_mask | hotkey_driver_mask) &
2211 ~hotkey_source_mask);
2212 hotkey_poll_setup(true);
2213
2214 mutex_unlock(&hotkey_mutex);
2215
2216 return rc;
2217 }
2218
2219 static int hotkey_status_get(int *status)
2220 {
2221 if (!acpi_evalf(hkey_handle, status, "DHKC", "d"))
2222 return -EIO;
2223
2224 return 0;
2225 }
2226
2227 static int hotkey_status_set(bool enable)
2228 {
2229 if (!acpi_evalf(hkey_handle, NULL, "MHKC", "vd", enable ? 1 : 0))
2230 return -EIO;
2231
2232 return 0;
2233 }
2234
2235 static void tpacpi_input_send_tabletsw(void)
2236 {
2237 int state;
2238
2239 if (tp_features.hotkey_tablet &&
2240 !hotkey_get_tablet_mode(&state)) {
2241 mutex_lock(&tpacpi_inputdev_send_mutex);
2242
2243 input_report_switch(tpacpi_inputdev,
2244 SW_TABLET_MODE, !!state);
2245 input_sync(tpacpi_inputdev);
2246
2247 mutex_unlock(&tpacpi_inputdev_send_mutex);
2248 }
2249 }
2250
2251 /* Do NOT call without validating scancode first */
2252 static void tpacpi_input_send_key(const unsigned int scancode)
2253 {
2254 const unsigned int keycode = hotkey_keycode_map[scancode];
2255
2256 if (keycode != KEY_RESERVED) {
2257 mutex_lock(&tpacpi_inputdev_send_mutex);
2258
2259 input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN, scancode);
2260 input_report_key(tpacpi_inputdev, keycode, 1);
2261 input_sync(tpacpi_inputdev);
2262
2263 input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN, scancode);
2264 input_report_key(tpacpi_inputdev, keycode, 0);
2265 input_sync(tpacpi_inputdev);
2266
2267 mutex_unlock(&tpacpi_inputdev_send_mutex);
2268 }
2269 }
2270
2271 /* Do NOT call without validating scancode first */
2272 static void tpacpi_input_send_key_masked(const unsigned int scancode)
2273 {
2274 hotkey_driver_event(scancode);
2275 if (hotkey_user_mask & (1 << scancode))
2276 tpacpi_input_send_key(scancode);
2277 }
2278
2279 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2280 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver;
2281
2282 /* Do NOT call without validating scancode first */
2283 static void tpacpi_hotkey_send_key(unsigned int scancode)
2284 {
2285 tpacpi_input_send_key_masked(scancode);
2286 if (hotkey_report_mode < 2) {
2287 acpi_bus_generate_proc_event(ibm_hotkey_acpidriver.device,
2288 0x80, TP_HKEY_EV_HOTKEY_BASE + scancode);
2289 }
2290 }
2291
2292 static void hotkey_read_nvram(struct tp_nvram_state *n, const u32 m)
2293 {
2294 u8 d;
2295
2296 if (m & TP_NVRAM_HKEY_GROUP_HK2) {
2297 d = nvram_read_byte(TP_NVRAM_ADDR_HK2);
2298 n->thinkpad_toggle = !!(d & TP_NVRAM_MASK_HKT_THINKPAD);
2299 n->zoom_toggle = !!(d & TP_NVRAM_MASK_HKT_ZOOM);
2300 n->display_toggle = !!(d & TP_NVRAM_MASK_HKT_DISPLAY);
2301 n->hibernate_toggle = !!(d & TP_NVRAM_MASK_HKT_HIBERNATE);
2302 }
2303 if (m & TP_ACPI_HKEY_THNKLGHT_MASK) {
2304 d = nvram_read_byte(TP_NVRAM_ADDR_THINKLIGHT);
2305 n->thinklight_toggle = !!(d & TP_NVRAM_MASK_THINKLIGHT);
2306 }
2307 if (m & TP_ACPI_HKEY_DISPXPAND_MASK) {
2308 d = nvram_read_byte(TP_NVRAM_ADDR_VIDEO);
2309 n->displayexp_toggle =
2310 !!(d & TP_NVRAM_MASK_HKT_DISPEXPND);
2311 }
2312 if (m & TP_NVRAM_HKEY_GROUP_BRIGHTNESS) {
2313 d = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS);
2314 n->brightness_level = (d & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
2315 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
2316 n->brightness_toggle =
2317 !!(d & TP_NVRAM_MASK_HKT_BRIGHTNESS);
2318 }
2319 if (m & TP_NVRAM_HKEY_GROUP_VOLUME) {
2320 d = nvram_read_byte(TP_NVRAM_ADDR_MIXER);
2321 n->volume_level = (d & TP_NVRAM_MASK_LEVEL_VOLUME)
2322 >> TP_NVRAM_POS_LEVEL_VOLUME;
2323 n->mute = !!(d & TP_NVRAM_MASK_MUTE);
2324 n->volume_toggle = !!(d & TP_NVRAM_MASK_HKT_VOLUME);
2325 }
2326 }
2327
2328 static void hotkey_compare_and_issue_event(struct tp_nvram_state *oldn,
2329 struct tp_nvram_state *newn,
2330 const u32 event_mask)
2331 {
2332
2333 #define TPACPI_COMPARE_KEY(__scancode, __member) \
2334 do { \
2335 if ((event_mask & (1 << __scancode)) && \
2336 oldn->__member != newn->__member) \
2337 tpacpi_hotkey_send_key(__scancode); \
2338 } while (0)
2339
2340 #define TPACPI_MAY_SEND_KEY(__scancode) \
2341 do { \
2342 if (event_mask & (1 << __scancode)) \
2343 tpacpi_hotkey_send_key(__scancode); \
2344 } while (0)
2345
2346 void issue_volchange(const unsigned int oldvol,
2347 const unsigned int newvol)
2348 {
2349 unsigned int i = oldvol;
2350
2351 while (i > newvol) {
2352 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
2353 i--;
2354 }
2355 while (i < newvol) {
2356 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
2357 i++;
2358 }
2359 }
2360
2361 void issue_brightnesschange(const unsigned int oldbrt,
2362 const unsigned int newbrt)
2363 {
2364 unsigned int i = oldbrt;
2365
2366 while (i > newbrt) {
2367 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
2368 i--;
2369 }
2370 while (i < newbrt) {
2371 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
2372 i++;
2373 }
2374 }
2375
2376 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_THINKPAD, thinkpad_toggle);
2377 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNSPACE, zoom_toggle);
2378 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF7, display_toggle);
2379 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF12, hibernate_toggle);
2380
2381 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNPAGEUP, thinklight_toggle);
2382
2383 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF8, displayexp_toggle);
2384
2385 /*
2386 * Handle volume
2387 *
2388 * This code is supposed to duplicate the IBM firmware behaviour:
2389 * - Pressing MUTE issues mute hotkey message, even when already mute
2390 * - Pressing Volume up/down issues volume up/down hotkey messages,
2391 * even when already at maximum or minimum volume
2392 * - The act of unmuting issues volume up/down notification,
2393 * depending which key was used to unmute
2394 *
2395 * We are constrained to what the NVRAM can tell us, which is not much
2396 * and certainly not enough if more than one volume hotkey was pressed
2397 * since the last poll cycle.
2398 *
2399 * Just to make our life interesting, some newer Lenovo ThinkPads have
2400 * bugs in the BIOS and may fail to update volume_toggle properly.
2401 */
2402 if (newn->mute) {
2403 /* muted */
2404 if (!oldn->mute ||
2405 oldn->volume_toggle != newn->volume_toggle ||
2406 oldn->volume_level != newn->volume_level) {
2407 /* recently muted, or repeated mute keypress, or
2408 * multiple presses ending in mute */
2409 issue_volchange(oldn->volume_level, newn->volume_level);
2410 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE);
2411 }
2412 } else {
2413 /* unmute */
2414 if (oldn->mute) {
2415 /* recently unmuted, issue 'unmute' keypress */
2416 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
2417 }
2418 if (oldn->volume_level != newn->volume_level) {
2419 issue_volchange(oldn->volume_level, newn->volume_level);
2420 } else if (oldn->volume_toggle != newn->volume_toggle) {
2421 /* repeated vol up/down keypress at end of scale ? */
2422 if (newn->volume_level == 0)
2423 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
2424 else if (newn->volume_level >= TP_NVRAM_LEVEL_VOLUME_MAX)
2425 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
2426 }
2427 }
2428
2429 /* handle brightness */
2430 if (oldn->brightness_level != newn->brightness_level) {
2431 issue_brightnesschange(oldn->brightness_level,
2432 newn->brightness_level);
2433 } else if (oldn->brightness_toggle != newn->brightness_toggle) {
2434 /* repeated key presses that didn't change state */
2435 if (newn->brightness_level == 0)
2436 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
2437 else if (newn->brightness_level >= bright_maxlvl
2438 && !tp_features.bright_unkfw)
2439 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
2440 }
2441
2442 #undef TPACPI_COMPARE_KEY
2443 #undef TPACPI_MAY_SEND_KEY
2444 }
2445
2446 /*
2447 * Polling driver
2448 *
2449 * We track all events in hotkey_source_mask all the time, since
2450 * most of them are edge-based. We only issue those requested by
2451 * hotkey_user_mask or hotkey_driver_mask, though.
2452 */
2453 static int hotkey_kthread(void *data)
2454 {
2455 struct tp_nvram_state s[2];
2456 u32 poll_mask, event_mask;
2457 unsigned int si, so;
2458 unsigned long t;
2459 unsigned int change_detector;
2460 unsigned int poll_freq;
2461 bool was_frozen;
2462
2463 mutex_lock(&hotkey_thread_mutex);
2464
2465 if (tpacpi_lifecycle == TPACPI_LIFE_EXITING)
2466 goto exit;
2467
2468 set_freezable();
2469
2470 so = 0;
2471 si = 1;
2472 t = 0;
2473
2474 /* Initial state for compares */
2475 mutex_lock(&hotkey_thread_data_mutex);
2476 change_detector = hotkey_config_change;
2477 poll_mask = hotkey_source_mask;
2478 event_mask = hotkey_source_mask &
2479 (hotkey_driver_mask | hotkey_user_mask);
2480 poll_freq = hotkey_poll_freq;
2481 mutex_unlock(&hotkey_thread_data_mutex);
2482 hotkey_read_nvram(&s[so], poll_mask);
2483
2484 while (!kthread_should_stop()) {
2485 if (t == 0) {
2486 if (likely(poll_freq))
2487 t = 1000/poll_freq;
2488 else
2489 t = 100; /* should never happen... */
2490 }
2491 t = msleep_interruptible(t);
2492 if (unlikely(kthread_freezable_should_stop(&was_frozen)))
2493 break;
2494
2495 if (t > 0 && !was_frozen)
2496 continue;
2497
2498 mutex_lock(&hotkey_thread_data_mutex);
2499 if (was_frozen || hotkey_config_change != change_detector) {
2500 /* forget old state on thaw or config change */
2501 si = so;
2502 t = 0;
2503 change_detector = hotkey_config_change;
2504 }
2505 poll_mask = hotkey_source_mask;
2506 event_mask = hotkey_source_mask &
2507 (hotkey_driver_mask | hotkey_user_mask);
2508 poll_freq = hotkey_poll_freq;
2509 mutex_unlock(&hotkey_thread_data_mutex);
2510
2511 if (likely(poll_mask)) {
2512 hotkey_read_nvram(&s[si], poll_mask);
2513 if (likely(si != so)) {
2514 hotkey_compare_and_issue_event(&s[so], &s[si],
2515 event_mask);
2516 }
2517 }
2518
2519 so = si;
2520 si ^= 1;
2521 }
2522
2523 exit:
2524 mutex_unlock(&hotkey_thread_mutex);
2525 return 0;
2526 }
2527
2528 /* call with hotkey_mutex held */
2529 static void hotkey_poll_stop_sync(void)
2530 {
2531 if (tpacpi_hotkey_task) {
2532 kthread_stop(tpacpi_hotkey_task);
2533 tpacpi_hotkey_task = NULL;
2534 mutex_lock(&hotkey_thread_mutex);
2535 /* at this point, the thread did exit */
2536 mutex_unlock(&hotkey_thread_mutex);
2537 }
2538 }
2539
2540 /* call with hotkey_mutex held */
2541 static void hotkey_poll_setup(const bool may_warn)
2542 {
2543 const u32 poll_driver_mask = hotkey_driver_mask & hotkey_source_mask;
2544 const u32 poll_user_mask = hotkey_user_mask & hotkey_source_mask;
2545
2546 if (hotkey_poll_freq > 0 &&
2547 (poll_driver_mask ||
2548 (poll_user_mask && tpacpi_inputdev->users > 0))) {
2549 if (!tpacpi_hotkey_task) {
2550 tpacpi_hotkey_task = kthread_run(hotkey_kthread,
2551 NULL, TPACPI_NVRAM_KTHREAD_NAME);
2552 if (IS_ERR(tpacpi_hotkey_task)) {
2553 tpacpi_hotkey_task = NULL;
2554 pr_err("could not create kernel thread "
2555 "for hotkey polling\n");
2556 }
2557 }
2558 } else {
2559 hotkey_poll_stop_sync();
2560 if (may_warn && (poll_driver_mask || poll_user_mask) &&
2561 hotkey_poll_freq == 0) {
2562 pr_notice("hot keys 0x%08x and/or events 0x%08x "
2563 "require polling, which is currently "
2564 "disabled\n",
2565 poll_user_mask, poll_driver_mask);
2566 }
2567 }
2568 }
2569
2570 static void hotkey_poll_setup_safe(const bool may_warn)
2571 {
2572 mutex_lock(&hotkey_mutex);
2573 hotkey_poll_setup(may_warn);
2574 mutex_unlock(&hotkey_mutex);
2575 }
2576
2577 /* call with hotkey_mutex held */
2578 static void hotkey_poll_set_freq(unsigned int freq)
2579 {
2580 if (!freq)
2581 hotkey_poll_stop_sync();
2582
2583 hotkey_poll_freq = freq;
2584 }
2585
2586 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2587
2588 static void hotkey_poll_setup(const bool __unused)
2589 {
2590 }
2591
2592 static void hotkey_poll_setup_safe(const bool __unused)
2593 {
2594 }
2595
2596 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2597
2598 static int hotkey_inputdev_open(struct input_dev *dev)
2599 {
2600 switch (tpacpi_lifecycle) {
2601 case TPACPI_LIFE_INIT:
2602 case TPACPI_LIFE_RUNNING:
2603 hotkey_poll_setup_safe(false);
2604 return 0;
2605 case TPACPI_LIFE_EXITING:
2606 return -EBUSY;
2607 }
2608
2609 /* Should only happen if tpacpi_lifecycle is corrupt */
2610 BUG();
2611 return -EBUSY;
2612 }
2613
2614 static void hotkey_inputdev_close(struct input_dev *dev)
2615 {
2616 /* disable hotkey polling when possible */
2617 if (tpacpi_lifecycle != TPACPI_LIFE_EXITING &&
2618 !(hotkey_source_mask & hotkey_driver_mask))
2619 hotkey_poll_setup_safe(false);
2620 }
2621
2622 /* sysfs hotkey enable ------------------------------------------------- */
2623 static ssize_t hotkey_enable_show(struct device *dev,
2624 struct device_attribute *attr,
2625 char *buf)
2626 {
2627 int res, status;
2628
2629 printk_deprecated_attribute("hotkey_enable",
2630 "Hotkey reporting is always enabled");
2631
2632 res = hotkey_status_get(&status);
2633 if (res)
2634 return res;
2635
2636 return snprintf(buf, PAGE_SIZE, "%d\n", status);
2637 }
2638
2639 static ssize_t hotkey_enable_store(struct device *dev,
2640 struct device_attribute *attr,
2641 const char *buf, size_t count)
2642 {
2643 unsigned long t;
2644
2645 printk_deprecated_attribute("hotkey_enable",
2646 "Hotkeys can be disabled through hotkey_mask");
2647
2648 if (parse_strtoul(buf, 1, &t))
2649 return -EINVAL;
2650
2651 if (t == 0)
2652 return -EPERM;
2653
2654 return count;
2655 }
2656
2657 static struct device_attribute dev_attr_hotkey_enable =
2658 __ATTR(hotkey_enable, S_IWUSR | S_IRUGO,
2659 hotkey_enable_show, hotkey_enable_store);
2660
2661 /* sysfs hotkey mask --------------------------------------------------- */
2662 static ssize_t hotkey_mask_show(struct device *dev,
2663 struct device_attribute *attr,
2664 char *buf)
2665 {
2666 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_user_mask);
2667 }
2668
2669 static ssize_t hotkey_mask_store(struct device *dev,
2670 struct device_attribute *attr,
2671 const char *buf, size_t count)
2672 {
2673 unsigned long t;
2674 int res;
2675
2676 if (parse_strtoul(buf, 0xffffffffUL, &t))
2677 return -EINVAL;
2678
2679 if (mutex_lock_killable(&hotkey_mutex))
2680 return -ERESTARTSYS;
2681
2682 res = hotkey_user_mask_set(t);
2683
2684 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2685 hotkey_poll_setup(true);
2686 #endif
2687
2688 mutex_unlock(&hotkey_mutex);
2689
2690 tpacpi_disclose_usertask("hotkey_mask", "set to 0x%08lx\n", t);
2691
2692 return (res) ? res : count;
2693 }
2694
2695 static struct device_attribute dev_attr_hotkey_mask =
2696 __ATTR(hotkey_mask, S_IWUSR | S_IRUGO,
2697 hotkey_mask_show, hotkey_mask_store);
2698
2699 /* sysfs hotkey bios_enabled ------------------------------------------- */
2700 static ssize_t hotkey_bios_enabled_show(struct device *dev,
2701 struct device_attribute *attr,
2702 char *buf)
2703 {
2704 return sprintf(buf, "0\n");
2705 }
2706
2707 static struct device_attribute dev_attr_hotkey_bios_enabled =
2708 __ATTR(hotkey_bios_enabled, S_IRUGO, hotkey_bios_enabled_show, NULL);
2709
2710 /* sysfs hotkey bios_mask ---------------------------------------------- */
2711 static ssize_t hotkey_bios_mask_show(struct device *dev,
2712 struct device_attribute *attr,
2713 char *buf)
2714 {
2715 printk_deprecated_attribute("hotkey_bios_mask",
2716 "This attribute is useless.");
2717 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_orig_mask);
2718 }
2719
2720 static struct device_attribute dev_attr_hotkey_bios_mask =
2721 __ATTR(hotkey_bios_mask, S_IRUGO, hotkey_bios_mask_show, NULL);
2722
2723 /* sysfs hotkey all_mask ----------------------------------------------- */
2724 static ssize_t hotkey_all_mask_show(struct device *dev,
2725 struct device_attribute *attr,
2726 char *buf)
2727 {
2728 return snprintf(buf, PAGE_SIZE, "0x%08x\n",
2729 hotkey_all_mask | hotkey_source_mask);
2730 }
2731
2732 static struct device_attribute dev_attr_hotkey_all_mask =
2733 __ATTR(hotkey_all_mask, S_IRUGO, hotkey_all_mask_show, NULL);
2734
2735 /* sysfs hotkey recommended_mask --------------------------------------- */
2736 static ssize_t hotkey_recommended_mask_show(struct device *dev,
2737 struct device_attribute *attr,
2738 char *buf)
2739 {
2740 return snprintf(buf, PAGE_SIZE, "0x%08x\n",
2741 (hotkey_all_mask | hotkey_source_mask)
2742 & ~hotkey_reserved_mask);
2743 }
2744
2745 static struct device_attribute dev_attr_hotkey_recommended_mask =
2746 __ATTR(hotkey_recommended_mask, S_IRUGO,
2747 hotkey_recommended_mask_show, NULL);
2748
2749 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2750
2751 /* sysfs hotkey hotkey_source_mask ------------------------------------- */
2752 static ssize_t hotkey_source_mask_show(struct device *dev,
2753 struct device_attribute *attr,
2754 char *buf)
2755 {
2756 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_source_mask);
2757 }
2758
2759 static ssize_t hotkey_source_mask_store(struct device *dev,
2760 struct device_attribute *attr,
2761 const char *buf, size_t count)
2762 {
2763 unsigned long t;
2764 u32 r_ev;
2765 int rc;
2766
2767 if (parse_strtoul(buf, 0xffffffffUL, &t) ||
2768 ((t & ~TPACPI_HKEY_NVRAM_KNOWN_MASK) != 0))
2769 return -EINVAL;
2770
2771 if (mutex_lock_killable(&hotkey_mutex))
2772 return -ERESTARTSYS;
2773
2774 HOTKEY_CONFIG_CRITICAL_START
2775 hotkey_source_mask = t;
2776 HOTKEY_CONFIG_CRITICAL_END
2777
2778 rc = hotkey_mask_set((hotkey_user_mask | hotkey_driver_mask) &
2779 ~hotkey_source_mask);
2780 hotkey_poll_setup(true);
2781
2782 /* check if events needed by the driver got disabled */
2783 r_ev = hotkey_driver_mask & ~(hotkey_acpi_mask & hotkey_all_mask)
2784 & ~hotkey_source_mask & TPACPI_HKEY_NVRAM_KNOWN_MASK;
2785
2786 mutex_unlock(&hotkey_mutex);
2787
2788 if (rc < 0)
2789 pr_err("hotkey_source_mask: "
2790 "failed to update the firmware event mask!\n");
2791
2792 if (r_ev)
2793 pr_notice("hotkey_source_mask: "
2794 "some important events were disabled: 0x%04x\n",
2795 r_ev);
2796
2797 tpacpi_disclose_usertask("hotkey_source_mask", "set to 0x%08lx\n", t);
2798
2799 return (rc < 0) ? rc : count;
2800 }
2801
2802 static struct device_attribute dev_attr_hotkey_source_mask =
2803 __ATTR(hotkey_source_mask, S_IWUSR | S_IRUGO,
2804 hotkey_source_mask_show, hotkey_source_mask_store);
2805
2806 /* sysfs hotkey hotkey_poll_freq --------------------------------------- */
2807 static ssize_t hotkey_poll_freq_show(struct device *dev,
2808 struct device_attribute *attr,
2809 char *buf)
2810 {
2811 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_poll_freq);
2812 }
2813
2814 static ssize_t hotkey_poll_freq_store(struct device *dev,
2815 struct device_attribute *attr,
2816 const char *buf, size_t count)
2817 {
2818 unsigned long t;
2819
2820 if (parse_strtoul(buf, 25, &t))
2821 return -EINVAL;
2822
2823 if (mutex_lock_killable(&hotkey_mutex))
2824 return -ERESTARTSYS;
2825
2826 hotkey_poll_set_freq(t);
2827 hotkey_poll_setup(true);
2828
2829 mutex_unlock(&hotkey_mutex);
2830
2831 tpacpi_disclose_usertask("hotkey_poll_freq", "set to %lu\n", t);
2832
2833 return count;
2834 }
2835
2836 static struct device_attribute dev_attr_hotkey_poll_freq =
2837 __ATTR(hotkey_poll_freq, S_IWUSR | S_IRUGO,
2838 hotkey_poll_freq_show, hotkey_poll_freq_store);
2839
2840 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2841
2842 /* sysfs hotkey radio_sw (pollable) ------------------------------------ */
2843 static ssize_t hotkey_radio_sw_show(struct device *dev,
2844 struct device_attribute *attr,
2845 char *buf)
2846 {
2847 int res;
2848 res = hotkey_get_wlsw();
2849 if (res < 0)
2850 return res;
2851
2852 /* Opportunistic update */
2853 tpacpi_rfk_update_hwblock_state((res == TPACPI_RFK_RADIO_OFF));
2854
2855 return snprintf(buf, PAGE_SIZE, "%d\n",
2856 (res == TPACPI_RFK_RADIO_OFF) ? 0 : 1);
2857 }
2858
2859 static struct device_attribute dev_attr_hotkey_radio_sw =
2860 __ATTR(hotkey_radio_sw, S_IRUGO, hotkey_radio_sw_show, NULL);
2861
2862 static void hotkey_radio_sw_notify_change(void)
2863 {
2864 if (tp_features.hotkey_wlsw)
2865 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2866 "hotkey_radio_sw");
2867 }
2868
2869 /* sysfs hotkey tablet mode (pollable) --------------------------------- */
2870 static ssize_t hotkey_tablet_mode_show(struct device *dev,
2871 struct device_attribute *attr,
2872 char *buf)
2873 {
2874 int res, s;
2875 res = hotkey_get_tablet_mode(&s);
2876 if (res < 0)
2877 return res;
2878
2879 return snprintf(buf, PAGE_SIZE, "%d\n", !!s);
2880 }
2881
2882 static struct device_attribute dev_attr_hotkey_tablet_mode =
2883 __ATTR(hotkey_tablet_mode, S_IRUGO, hotkey_tablet_mode_show, NULL);
2884
2885 static void hotkey_tablet_mode_notify_change(void)
2886 {
2887 if (tp_features.hotkey_tablet)
2888 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2889 "hotkey_tablet_mode");
2890 }
2891
2892 /* sysfs hotkey report_mode -------------------------------------------- */
2893 static ssize_t hotkey_report_mode_show(struct device *dev,
2894 struct device_attribute *attr,
2895 char *buf)
2896 {
2897 return snprintf(buf, PAGE_SIZE, "%d\n",
2898 (hotkey_report_mode != 0) ? hotkey_report_mode : 1);
2899 }
2900
2901 static struct device_attribute dev_attr_hotkey_report_mode =
2902 __ATTR(hotkey_report_mode, S_IRUGO, hotkey_report_mode_show, NULL);
2903
2904 /* sysfs wakeup reason (pollable) -------------------------------------- */
2905 static ssize_t hotkey_wakeup_reason_show(struct device *dev,
2906 struct device_attribute *attr,
2907 char *buf)
2908 {
2909 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_wakeup_reason);
2910 }
2911
2912 static struct device_attribute dev_attr_hotkey_wakeup_reason =
2913 __ATTR(wakeup_reason, S_IRUGO, hotkey_wakeup_reason_show, NULL);
2914
2915 static void hotkey_wakeup_reason_notify_change(void)
2916 {
2917 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2918 "wakeup_reason");
2919 }
2920
2921 /* sysfs wakeup hotunplug_complete (pollable) -------------------------- */
2922 static ssize_t hotkey_wakeup_hotunplug_complete_show(struct device *dev,
2923 struct device_attribute *attr,
2924 char *buf)
2925 {
2926 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_autosleep_ack);
2927 }
2928
2929 static struct device_attribute dev_attr_hotkey_wakeup_hotunplug_complete =
2930 __ATTR(wakeup_hotunplug_complete, S_IRUGO,
2931 hotkey_wakeup_hotunplug_complete_show, NULL);
2932
2933 static void hotkey_wakeup_hotunplug_complete_notify_change(void)
2934 {
2935 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2936 "wakeup_hotunplug_complete");
2937 }
2938
2939 /* --------------------------------------------------------------------- */
2940
2941 static struct attribute *hotkey_attributes[] __initdata = {
2942 &dev_attr_hotkey_enable.attr,
2943 &dev_attr_hotkey_bios_enabled.attr,
2944 &dev_attr_hotkey_bios_mask.attr,
2945 &dev_attr_hotkey_report_mode.attr,
2946 &dev_attr_hotkey_wakeup_reason.attr,
2947 &dev_attr_hotkey_wakeup_hotunplug_complete.attr,
2948 &dev_attr_hotkey_mask.attr,
2949 &dev_attr_hotkey_all_mask.attr,
2950 &dev_attr_hotkey_recommended_mask.attr,
2951 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2952 &dev_attr_hotkey_source_mask.attr,
2953 &dev_attr_hotkey_poll_freq.attr,
2954 #endif
2955 };
2956
2957 /*
2958 * Sync both the hw and sw blocking state of all switches
2959 */
2960 static void tpacpi_send_radiosw_update(void)
2961 {
2962 int wlsw;
2963
2964 /*
2965 * We must sync all rfkill controllers *before* issuing any
2966 * rfkill input events, or we will race the rfkill core input
2967 * handler.
2968 *
2969 * tpacpi_inputdev_send_mutex works as a synchronization point
2970 * for the above.
2971 *
2972 * We optimize to avoid numerous calls to hotkey_get_wlsw.
2973 */
2974
2975 wlsw = hotkey_get_wlsw();
2976
2977 /* Sync hw blocking state first if it is hw-blocked */
2978 if (wlsw == TPACPI_RFK_RADIO_OFF)
2979 tpacpi_rfk_update_hwblock_state(true);
2980
2981 /* Sync sw blocking state */
2982 tpacpi_rfk_update_swstate_all();
2983
2984 /* Sync hw blocking state last if it is hw-unblocked */
2985 if (wlsw == TPACPI_RFK_RADIO_ON)
2986 tpacpi_rfk_update_hwblock_state(false);
2987
2988 /* Issue rfkill input event for WLSW switch */
2989 if (!(wlsw < 0)) {
2990 mutex_lock(&tpacpi_inputdev_send_mutex);
2991
2992 input_report_switch(tpacpi_inputdev,
2993 SW_RFKILL_ALL, (wlsw > 0));
2994 input_sync(tpacpi_inputdev);
2995
2996 mutex_unlock(&tpacpi_inputdev_send_mutex);
2997 }
2998
2999 /*
3000 * this can be unconditional, as we will poll state again
3001 * if userspace uses the notify to read data
3002 */
3003 hotkey_radio_sw_notify_change();
3004 }
3005
3006 static void hotkey_exit(void)
3007 {
3008 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
3009 mutex_lock(&hotkey_mutex);
3010 hotkey_poll_stop_sync();
3011 mutex_unlock(&hotkey_mutex);
3012 #endif
3013
3014 if (hotkey_dev_attributes)
3015 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
3016
3017 kfree(hotkey_keycode_map);
3018
3019 dbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_HKEY,
3020 "restoring original HKEY status and mask\n");
3021 /* yes, there is a bitwise or below, we want the
3022 * functions to be called even if one of them fail */
3023 if (((tp_features.hotkey_mask &&
3024 hotkey_mask_set(hotkey_orig_mask)) |
3025 hotkey_status_set(false)) != 0)
3026 pr_err("failed to restore hot key mask "
3027 "to BIOS defaults\n");
3028 }
3029
3030 static void __init hotkey_unmap(const unsigned int scancode)
3031 {
3032 if (hotkey_keycode_map[scancode] != KEY_RESERVED) {
3033 clear_bit(hotkey_keycode_map[scancode],
3034 tpacpi_inputdev->keybit);
3035 hotkey_keycode_map[scancode] = KEY_RESERVED;
3036 }
3037 }
3038
3039 /*
3040 * HKEY quirks:
3041 * TPACPI_HK_Q_INIMASK: Supports FN+F3,FN+F4,FN+F12
3042 */
3043
3044 #define TPACPI_HK_Q_INIMASK 0x0001
3045
3046 static const struct tpacpi_quirk tpacpi_hotkey_qtable[] __initconst = {
3047 TPACPI_Q_IBM('I', 'H', TPACPI_HK_Q_INIMASK), /* 600E */
3048 TPACPI_Q_IBM('I', 'N', TPACPI_HK_Q_INIMASK), /* 600E */
3049 TPACPI_Q_IBM('I', 'D', TPACPI_HK_Q_INIMASK), /* 770, 770E, 770ED */
3050 TPACPI_Q_IBM('I', 'W', TPACPI_HK_Q_INIMASK), /* A20m */
3051 TPACPI_Q_IBM('I', 'V', TPACPI_HK_Q_INIMASK), /* A20p */
3052 TPACPI_Q_IBM('1', '0', TPACPI_HK_Q_INIMASK), /* A21e, A22e */
3053 TPACPI_Q_IBM('K', 'U', TPACPI_HK_Q_INIMASK), /* A21e */
3054 TPACPI_Q_IBM('K', 'X', TPACPI_HK_Q_INIMASK), /* A21m, A22m */
3055 TPACPI_Q_IBM('K', 'Y', TPACPI_HK_Q_INIMASK), /* A21p, A22p */
3056 TPACPI_Q_IBM('1', 'B', TPACPI_HK_Q_INIMASK), /* A22e */
3057 TPACPI_Q_IBM('1', '3', TPACPI_HK_Q_INIMASK), /* A22m */
3058 TPACPI_Q_IBM('1', 'E', TPACPI_HK_Q_INIMASK), /* A30/p (0) */
3059 TPACPI_Q_IBM('1', 'C', TPACPI_HK_Q_INIMASK), /* R30 */
3060 TPACPI_Q_IBM('1', 'F', TPACPI_HK_Q_INIMASK), /* R31 */
3061 TPACPI_Q_IBM('I', 'Y', TPACPI_HK_Q_INIMASK), /* T20 */
3062 TPACPI_Q_IBM('K', 'Z', TPACPI_HK_Q_INIMASK), /* T21 */
3063 TPACPI_Q_IBM('1', '6', TPACPI_HK_Q_INIMASK), /* T22 */
3064 TPACPI_Q_IBM('I', 'Z', TPACPI_HK_Q_INIMASK), /* X20, X21 */
3065 TPACPI_Q_IBM('1', 'D', TPACPI_HK_Q_INIMASK), /* X22, X23, X24 */
3066 };
3067
3068 typedef u16 tpacpi_keymap_entry_t;
3069 typedef tpacpi_keymap_entry_t tpacpi_keymap_t[TPACPI_HOTKEY_MAP_LEN];
3070
3071 static int __init hotkey_init(struct ibm_init_struct *iibm)
3072 {
3073 /* Requirements for changing the default keymaps:
3074 *
3075 * 1. Many of the keys are mapped to KEY_RESERVED for very
3076 * good reasons. Do not change them unless you have deep
3077 * knowledge on the IBM and Lenovo ThinkPad firmware for
3078 * the various ThinkPad models. The driver behaves
3079 * differently for KEY_RESERVED: such keys have their
3080 * hot key mask *unset* in mask_recommended, and also
3081 * in the initial hot key mask programmed into the
3082 * firmware at driver load time, which means the firm-
3083 * ware may react very differently if you change them to
3084 * something else;
3085 *
3086 * 2. You must be subscribed to the linux-thinkpad and
3087 * ibm-acpi-devel mailing lists, and you should read the
3088 * list archives since 2007 if you want to change the
3089 * keymaps. This requirement exists so that you will
3090 * know the past history of problems with the thinkpad-
3091 * acpi driver keymaps, and also that you will be
3092 * listening to any bug reports;
3093 *
3094 * 3. Do not send thinkpad-acpi specific patches directly to
3095 * for merging, *ever*. Send them to the linux-acpi
3096 * mailinglist for comments. Merging is to be done only
3097 * through acpi-test and the ACPI maintainer.
3098 *
3099 * If the above is too much to ask, don't change the keymap.
3100 * Ask the thinkpad-acpi maintainer to do it, instead.
3101 */
3102
3103 enum keymap_index {
3104 TPACPI_KEYMAP_IBM_GENERIC = 0,
3105 TPACPI_KEYMAP_LENOVO_GENERIC,
3106 };
3107
3108 static const tpacpi_keymap_t tpacpi_keymaps[] __initconst = {
3109 /* Generic keymap for IBM ThinkPads */
3110 [TPACPI_KEYMAP_IBM_GENERIC] = {
3111 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
3112 KEY_FN_F1, KEY_BATTERY, KEY_COFFEE, KEY_SLEEP,
3113 KEY_WLAN, KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
3114 KEY_FN_F9, KEY_FN_F10, KEY_FN_F11, KEY_SUSPEND,
3115
3116 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
3117 KEY_UNKNOWN, /* 0x0C: FN+BACKSPACE */
3118 KEY_UNKNOWN, /* 0x0D: FN+INSERT */
3119 KEY_UNKNOWN, /* 0x0E: FN+DELETE */
3120
3121 /* brightness: firmware always reacts to them */
3122 KEY_RESERVED, /* 0x0F: FN+HOME (brightness up) */
3123 KEY_RESERVED, /* 0x10: FN+END (brightness down) */
3124
3125 /* Thinklight: firmware always react to it */
3126 KEY_RESERVED, /* 0x11: FN+PGUP (thinklight toggle) */
3127
3128 KEY_UNKNOWN, /* 0x12: FN+PGDOWN */
3129 KEY_ZOOM, /* 0x13: FN+SPACE (zoom) */
3130
3131 /* Volume: firmware always react to it and reprograms
3132 * the built-in *extra* mixer. Never map it to control
3133 * another mixer by default. */
3134 KEY_RESERVED, /* 0x14: VOLUME UP */
3135 KEY_RESERVED, /* 0x15: VOLUME DOWN */
3136 KEY_RESERVED, /* 0x16: MUTE */
3137
3138 KEY_VENDOR, /* 0x17: Thinkpad/AccessIBM/Lenovo */
3139
3140 /* (assignments unknown, please report if found) */
3141 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3142 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3143 },
3144
3145 /* Generic keymap for Lenovo ThinkPads */
3146 [TPACPI_KEYMAP_LENOVO_GENERIC] = {
3147 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
3148 KEY_FN_F1, KEY_COFFEE, KEY_BATTERY, KEY_SLEEP,
3149 KEY_WLAN, KEY_CAMERA, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
3150 KEY_FN_F9, KEY_FN_F10, KEY_FN_F11, KEY_SUSPEND,
3151
3152 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
3153 KEY_UNKNOWN, /* 0x0C: FN+BACKSPACE */
3154 KEY_UNKNOWN, /* 0x0D: FN+INSERT */
3155 KEY_UNKNOWN, /* 0x0E: FN+DELETE */
3156
3157 /* These should be enabled --only-- when ACPI video
3158 * is disabled (i.e. in "vendor" mode), and are handled
3159 * in a special way by the init code */
3160 KEY_BRIGHTNESSUP, /* 0x0F: FN+HOME (brightness up) */
3161 KEY_BRIGHTNESSDOWN, /* 0x10: FN+END (brightness down) */
3162
3163 KEY_RESERVED, /* 0x11: FN+PGUP (thinklight toggle) */
3164
3165 KEY_UNKNOWN, /* 0x12: FN+PGDOWN */
3166 KEY_ZOOM, /* 0x13: FN+SPACE (zoom) */
3167
3168 /* Volume: z60/z61, T60 (BIOS version?): firmware always
3169 * react to it and reprograms the built-in *extra* mixer.
3170 * Never map it to control another mixer by default.
3171 *
3172 * T60?, T61, R60?, R61: firmware and EC tries to send
3173 * these over the regular keyboard, so these are no-ops,
3174 * but there are still weird bugs re. MUTE, so do not
3175 * change unless you get test reports from all Lenovo
3176 * models. May cause the BIOS to interfere with the
3177 * HDA mixer.
3178 */
3179 KEY_RESERVED, /* 0x14: VOLUME UP */
3180 KEY_RESERVED, /* 0x15: VOLUME DOWN */
3181 KEY_RESERVED, /* 0x16: MUTE */
3182
3183 KEY_VENDOR, /* 0x17: Thinkpad/AccessIBM/Lenovo */
3184
3185 /* (assignments unknown, please report if found) */
3186 KEY_UNKNOWN, KEY_UNKNOWN,
3187
3188 /*
3189 * The mic mute button only sends 0x1a. It does not
3190 * automatically mute the mic or change the mute light.
3191 */
3192 KEY_MICMUTE, /* 0x1a: Mic mute (since ?400 or so) */
3193
3194 /* (assignments unknown, please report if found) */
3195 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3196 KEY_UNKNOWN,
3197 },
3198 };
3199
3200 static const struct tpacpi_quirk tpacpi_keymap_qtable[] __initconst = {
3201 /* Generic maps (fallback) */
3202 {
3203 .vendor = PCI_VENDOR_ID_IBM,
3204 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY,
3205 .quirks = TPACPI_KEYMAP_IBM_GENERIC,
3206 },
3207 {
3208 .vendor = PCI_VENDOR_ID_LENOVO,
3209 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY,
3210 .quirks = TPACPI_KEYMAP_LENOVO_GENERIC,
3211 },
3212 };
3213
3214 #define TPACPI_HOTKEY_MAP_SIZE sizeof(tpacpi_keymap_t)
3215 #define TPACPI_HOTKEY_MAP_TYPESIZE sizeof(tpacpi_keymap_entry_t)
3216
3217 int res, i;
3218 int status;
3219 int hkeyv;
3220 bool radiosw_state = false;
3221 bool tabletsw_state = false;
3222
3223 unsigned long quirks;
3224 unsigned long keymap_id;
3225
3226 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3227 "initializing hotkey subdriver\n");
3228
3229 BUG_ON(!tpacpi_inputdev);
3230 BUG_ON(tpacpi_inputdev->open != NULL ||
3231 tpacpi_inputdev->close != NULL);
3232
3233 TPACPI_ACPIHANDLE_INIT(hkey);
3234 mutex_init(&hotkey_mutex);
3235
3236 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
3237 mutex_init(&hotkey_thread_mutex);
3238 mutex_init(&hotkey_thread_data_mutex);
3239 #endif
3240
3241 /* hotkey not supported on 570 */
3242 tp_features.hotkey = hkey_handle != NULL;
3243
3244 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3245 "hotkeys are %s\n",
3246 str_supported(tp_features.hotkey));
3247
3248 if (!tp_features.hotkey)
3249 return 1;
3250
3251 quirks = tpacpi_check_quirks(tpacpi_hotkey_qtable,
3252 ARRAY_SIZE(tpacpi_hotkey_qtable));
3253
3254 tpacpi_disable_brightness_delay();
3255
3256 /* MUST have enough space for all attributes to be added to
3257 * hotkey_dev_attributes */
3258 hotkey_dev_attributes = create_attr_set(
3259 ARRAY_SIZE(hotkey_attributes) + 2,
3260 NULL);
3261 if (!hotkey_dev_attributes)
3262 return -ENOMEM;
3263 res = add_many_to_attr_set(hotkey_dev_attributes,
3264 hotkey_attributes,
3265 ARRAY_SIZE(hotkey_attributes));
3266 if (res)
3267 goto err_exit;
3268
3269 /* mask not supported on 600e/x, 770e, 770x, A21e, A2xm/p,
3270 A30, R30, R31, T20-22, X20-21, X22-24. Detected by checking
3271 for HKEY interface version 0x100 */
3272 if (acpi_evalf(hkey_handle, &hkeyv, "MHKV", "qd")) {
3273 if ((hkeyv >> 8) != 1) {
3274 pr_err("unknown version of the HKEY interface: 0x%x\n",
3275 hkeyv);
3276 pr_err("please report this to %s\n", TPACPI_MAIL);
3277 } else {
3278 /*
3279 * MHKV 0x100 in A31, R40, R40e,
3280 * T4x, X31, and later
3281 */
3282 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3283 "firmware HKEY interface version: 0x%x\n",
3284 hkeyv);
3285
3286 /* Paranoia check AND init hotkey_all_mask */
3287 if (!acpi_evalf(hkey_handle, &hotkey_all_mask,
3288 "MHKA", "qd")) {
3289 pr_err("missing MHKA handler, "
3290 "please report this to %s\n",
3291 TPACPI_MAIL);
3292 /* Fallback: pre-init for FN+F3,F4,F12 */
3293 hotkey_all_mask = 0x080cU;
3294 } else {
3295 tp_features.hotkey_mask = 1;
3296 }
3297 }
3298 }
3299
3300 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3301 "hotkey masks are %s\n",
3302 str_supported(tp_features.hotkey_mask));
3303
3304 /* Init hotkey_all_mask if not initialized yet */
3305 if (!tp_features.hotkey_mask && !hotkey_all_mask &&
3306 (quirks & TPACPI_HK_Q_INIMASK))
3307 hotkey_all_mask = 0x080cU; /* FN+F12, FN+F4, FN+F3 */
3308
3309 /* Init hotkey_acpi_mask and hotkey_orig_mask */
3310 if (tp_features.hotkey_mask) {
3311 /* hotkey_source_mask *must* be zero for
3312 * the first hotkey_mask_get to return hotkey_orig_mask */
3313 res = hotkey_mask_get();
3314 if (res)
3315 goto err_exit;
3316
3317 hotkey_orig_mask = hotkey_acpi_mask;
3318 } else {
3319 hotkey_orig_mask = hotkey_all_mask;
3320 hotkey_acpi_mask = hotkey_all_mask;
3321 }
3322
3323 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3324 if (dbg_wlswemul) {
3325 tp_features.hotkey_wlsw = 1;
3326 radiosw_state = !!tpacpi_wlsw_emulstate;
3327 pr_info("radio switch emulation enabled\n");
3328 } else
3329 #endif
3330 /* Not all thinkpads have a hardware radio switch */
3331 if (acpi_evalf(hkey_handle, &status, "WLSW", "qd")) {
3332 tp_features.hotkey_wlsw = 1;
3333 radiosw_state = !!status;
3334 pr_info("radio switch found; radios are %s\n",
3335 enabled(status, 0));
3336 }
3337 if (tp_features.hotkey_wlsw)
3338 res = add_to_attr_set(hotkey_dev_attributes,
3339 &dev_attr_hotkey_radio_sw.attr);
3340
3341 /* For X41t, X60t, X61t Tablets... */
3342 if (!res && acpi_evalf(hkey_handle, &status, "MHKG", "qd")) {
3343 tp_features.hotkey_tablet = 1;
3344 tabletsw_state = !!(status & TP_HOTKEY_TABLET_MASK);
3345 pr_info("possible tablet mode switch found; "
3346 "ThinkPad in %s mode\n",
3347 (tabletsw_state) ? "tablet" : "laptop");
3348 res = add_to_attr_set(hotkey_dev_attributes,
3349 &dev_attr_hotkey_tablet_mode.attr);
3350 }
3351
3352 if (!res)
3353 res = register_attr_set_with_sysfs(
3354 hotkey_dev_attributes,
3355 &tpacpi_pdev->dev.kobj);
3356 if (res)
3357 goto err_exit;
3358
3359 /* Set up key map */
3360 hotkey_keycode_map = kmalloc(TPACPI_HOTKEY_MAP_SIZE,
3361 GFP_KERNEL);
3362 if (!hotkey_keycode_map) {
3363 pr_err("failed to allocate memory for key map\n");
3364 res = -ENOMEM;
3365 goto err_exit;
3366 }
3367
3368 keymap_id = tpacpi_check_quirks(tpacpi_keymap_qtable,
3369 ARRAY_SIZE(tpacpi_keymap_qtable));
3370 BUG_ON(keymap_id >= ARRAY_SIZE(tpacpi_keymaps));
3371 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3372 "using keymap number %lu\n", keymap_id);
3373
3374 memcpy(hotkey_keycode_map, &tpacpi_keymaps[keymap_id],
3375 TPACPI_HOTKEY_MAP_SIZE);
3376
3377 input_set_capability(tpacpi_inputdev, EV_MSC, MSC_SCAN);
3378 tpacpi_inputdev->keycodesize = TPACPI_HOTKEY_MAP_TYPESIZE;
3379 tpacpi_inputdev->keycodemax = TPACPI_HOTKEY_MAP_LEN;
3380 tpacpi_inputdev->keycode = hotkey_keycode_map;
3381 for (i = 0; i < TPACPI_HOTKEY_MAP_LEN; i++) {
3382 if (hotkey_keycode_map[i] != KEY_RESERVED) {
3383 input_set_capability(tpacpi_inputdev, EV_KEY,
3384 hotkey_keycode_map[i]);
3385 } else {
3386 if (i < sizeof(hotkey_reserved_mask)*8)
3387 hotkey_reserved_mask |= 1 << i;
3388 }
3389 }
3390
3391 if (tp_features.hotkey_wlsw) {
3392 input_set_capability(tpacpi_inputdev, EV_SW, SW_RFKILL_ALL);
3393 input_report_switch(tpacpi_inputdev,
3394 SW_RFKILL_ALL, radiosw_state);
3395 }
3396 if (tp_features.hotkey_tablet) {
3397 input_set_capability(tpacpi_inputdev, EV_SW, SW_TABLET_MODE);
3398 input_report_switch(tpacpi_inputdev,
3399 SW_TABLET_MODE, tabletsw_state);
3400 }
3401
3402 /* Do not issue duplicate brightness change events to
3403 * userspace. tpacpi_detect_brightness_capabilities() must have
3404 * been called before this point */
3405 if (tp_features.bright_acpimode && acpi_video_backlight_support()) {
3406 pr_info("This ThinkPad has standard ACPI backlight "
3407 "brightness control, supported by the ACPI "
3408 "video driver\n");
3409 pr_notice("Disabling thinkpad-acpi brightness events "
3410 "by default...\n");
3411
3412 /* Disable brightness up/down on Lenovo thinkpads when
3413 * ACPI is handling them, otherwise it is plain impossible
3414 * for userspace to do something even remotely sane */
3415 hotkey_reserved_mask |=
3416 (1 << TP_ACPI_HOTKEYSCAN_FNHOME)
3417 | (1 << TP_ACPI_HOTKEYSCAN_FNEND);
3418 hotkey_unmap(TP_ACPI_HOTKEYSCAN_FNHOME);
3419 hotkey_unmap(TP_ACPI_HOTKEYSCAN_FNEND);
3420 }
3421
3422 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
3423 hotkey_source_mask = TPACPI_HKEY_NVRAM_GOOD_MASK
3424 & ~hotkey_all_mask
3425 & ~hotkey_reserved_mask;
3426
3427 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3428 "hotkey source mask 0x%08x, polling freq %u\n",
3429 hotkey_source_mask, hotkey_poll_freq);
3430 #endif
3431
3432 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3433 "enabling firmware HKEY event interface...\n");
3434 res = hotkey_status_set(true);
3435 if (res) {
3436 hotkey_exit();
3437 return res;
3438 }
3439 res = hotkey_mask_set(((hotkey_all_mask & ~hotkey_reserved_mask)
3440 | hotkey_driver_mask)
3441 & ~hotkey_source_mask);
3442 if (res < 0 && res != -ENXIO) {
3443 hotkey_exit();
3444 return res;
3445 }
3446 hotkey_user_mask = (hotkey_acpi_mask | hotkey_source_mask)
3447 & ~hotkey_reserved_mask;
3448 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3449 "initial masks: user=0x%08x, fw=0x%08x, poll=0x%08x\n",
3450 hotkey_user_mask, hotkey_acpi_mask, hotkey_source_mask);
3451
3452 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3453 "legacy ibm/hotkey event reporting over procfs %s\n",
3454 (hotkey_report_mode < 2) ?
3455 "enabled" : "disabled");
3456
3457 tpacpi_inputdev->open = &hotkey_inputdev_open;
3458 tpacpi_inputdev->close = &hotkey_inputdev_close;
3459
3460 hotkey_poll_setup_safe(true);
3461
3462 return 0;
3463
3464 err_exit:
3465 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
3466 hotkey_dev_attributes = NULL;
3467
3468 return (res < 0)? res : 1;
3469 }
3470
3471 static bool hotkey_notify_hotkey(const u32 hkey,
3472 bool *send_acpi_ev,
3473 bool *ignore_acpi_ev)
3474 {
3475 /* 0x1000-0x1FFF: key presses */
3476 unsigned int scancode = hkey & 0xfff;
3477 *send_acpi_ev = true;
3478 *ignore_acpi_ev = false;
3479
3480 /* HKEY event 0x1001 is scancode 0x00 */
3481 if (scancode > 0 && scancode <= TPACPI_HOTKEY_MAP_LEN) {
3482 scancode--;
3483 if (!(hotkey_source_mask & (1 << scancode))) {
3484 tpacpi_input_send_key_masked(scancode);
3485 *send_acpi_ev = false;
3486 } else {
3487 *ignore_acpi_ev = true;
3488 }
3489 return true;
3490 }
3491 return false;
3492 }
3493
3494 static bool hotkey_notify_wakeup(const u32 hkey,
3495 bool *send_acpi_ev,
3496 bool *ignore_acpi_ev)
3497 {
3498 /* 0x2000-0x2FFF: Wakeup reason */
3499 *send_acpi_ev = true;
3500 *ignore_acpi_ev = false;
3501
3502 switch (hkey) {
3503 case TP_HKEY_EV_WKUP_S3_UNDOCK: /* suspend, undock */
3504 case TP_HKEY_EV_WKUP_S4_UNDOCK: /* hibernation, undock */
3505 hotkey_wakeup_reason = TP_ACPI_WAKEUP_UNDOCK;
3506 *ignore_acpi_ev = true;
3507 break;
3508
3509 case TP_HKEY_EV_WKUP_S3_BAYEJ: /* suspend, bay eject */
3510 case TP_HKEY_EV_WKUP_S4_BAYEJ: /* hibernation, bay eject */
3511 hotkey_wakeup_reason = TP_ACPI_WAKEUP_BAYEJ;
3512 *ignore_acpi_ev = true;
3513 break;
3514
3515 case TP_HKEY_EV_WKUP_S3_BATLOW: /* Battery on critical low level/S3 */
3516 case TP_HKEY_EV_WKUP_S4_BATLOW: /* Battery on critical low level/S4 */
3517 pr_alert("EMERGENCY WAKEUP: battery almost empty\n");
3518 /* how to auto-heal: */
3519 /* 2313: woke up from S3, go to S4/S5 */
3520 /* 2413: woke up from S4, go to S5 */
3521 break;
3522
3523 default:
3524 return false;
3525 }
3526
3527 if (hotkey_wakeup_reason != TP_ACPI_WAKEUP_NONE) {
3528 pr_info("woke up due to a hot-unplug request...\n");
3529 hotkey_wakeup_reason_notify_change();
3530 }
3531 return true;
3532 }
3533
3534 static bool hotkey_notify_dockevent(const u32 hkey,
3535 bool *send_acpi_ev,
3536 bool *ignore_acpi_ev)
3537 {
3538 /* 0x4000-0x4FFF: dock-related events */
3539 *send_acpi_ev = true;
3540 *ignore_acpi_ev = false;
3541
3542 switch (hkey) {
3543 case TP_HKEY_EV_UNDOCK_ACK:
3544 /* ACPI undock operation completed after wakeup */
3545 hotkey_autosleep_ack = 1;
3546 pr_info("undocked\n");
3547 hotkey_wakeup_hotunplug_complete_notify_change();
3548 return true;
3549
3550 case TP_HKEY_EV_HOTPLUG_DOCK: /* docked to port replicator */
3551 pr_info("docked into hotplug port replicator\n");
3552 return true;
3553 case TP_HKEY_EV_HOTPLUG_UNDOCK: /* undocked from port replicator */
3554 pr_info("undocked from hotplug port replicator\n");
3555 return true;
3556
3557 default:
3558 return false;
3559 }
3560 }
3561
3562 static bool hotkey_notify_usrevent(const u32 hkey,
3563 bool *send_acpi_ev,
3564 bool *ignore_acpi_ev)
3565 {
3566 /* 0x5000-0x5FFF: human interface helpers */
3567 *send_acpi_ev = true;
3568 *ignore_acpi_ev = false;
3569
3570 switch (hkey) {
3571 case TP_HKEY_EV_PEN_INSERTED: /* X61t: tablet pen inserted into bay */
3572 case TP_HKEY_EV_PEN_REMOVED: /* X61t: tablet pen removed from bay */
3573 return true;
3574
3575 case TP_HKEY_EV_TABLET_TABLET: /* X41t-X61t: tablet mode */
3576 case TP_HKEY_EV_TABLET_NOTEBOOK: /* X41t-X61t: normal mode */
3577 tpacpi_input_send_tabletsw();
3578 hotkey_tablet_mode_notify_change();
3579 *send_acpi_ev = false;
3580 return true;
3581
3582 case TP_HKEY_EV_LID_CLOSE: /* Lid closed */
3583 case TP_HKEY_EV_LID_OPEN: /* Lid opened */
3584 case TP_HKEY_EV_BRGHT_CHANGED: /* brightness changed */
3585 /* do not propagate these events */
3586 *ignore_acpi_ev = true;
3587 return true;
3588
3589 default:
3590 return false;
3591 }
3592 }
3593
3594 static void thermal_dump_all_sensors(void);
3595
3596 static bool hotkey_notify_6xxx(const u32 hkey,
3597 bool *send_acpi_ev,
3598 bool *ignore_acpi_ev)
3599 {
3600 bool known = true;
3601
3602 /* 0x6000-0x6FFF: thermal alarms/notices and keyboard events */
3603 *send_acpi_ev = true;
3604 *ignore_acpi_ev = false;
3605
3606 switch (hkey) {
3607 case TP_HKEY_EV_THM_TABLE_CHANGED:
3608 pr_info("EC reports that Thermal Table has changed\n");
3609 /* recommended action: do nothing, we don't have
3610 * Lenovo ATM information */
3611 return true;
3612 case TP_HKEY_EV_ALARM_BAT_HOT:
3613 pr_crit("THERMAL ALARM: battery is too hot!\n");
3614 /* recommended action: warn user through gui */
3615 break;
3616 case TP_HKEY_EV_ALARM_BAT_XHOT:
3617 pr_alert("THERMAL EMERGENCY: battery is extremely hot!\n");
3618 /* recommended action: immediate sleep/hibernate */
3619 break;
3620 case TP_HKEY_EV_ALARM_SENSOR_HOT:
3621 pr_crit("THERMAL ALARM: "
3622 "a sensor reports something is too hot!\n");
3623 /* recommended action: warn user through gui, that */
3624 /* some internal component is too hot */
3625 break;
3626 case TP_HKEY_EV_ALARM_SENSOR_XHOT:
3627 pr_alert("THERMAL EMERGENCY: "
3628 "a sensor reports something is extremely hot!\n");
3629 /* recommended action: immediate sleep/hibernate */
3630 break;
3631
3632 case TP_HKEY_EV_KEY_NUMLOCK:
3633 case TP_HKEY_EV_KEY_FN:
3634 /* key press events, we just ignore them as long as the EC
3635 * is still reporting them in the normal keyboard stream */
3636 *send_acpi_ev = false;
3637 *ignore_acpi_ev = true;
3638 return true;
3639
3640 default:
3641 pr_warn("unknown possible thermal alarm or keyboard event received\n");
3642 known = false;
3643 }
3644
3645 thermal_dump_all_sensors();
3646
3647 return known;
3648 }
3649
3650 static void hotkey_notify(struct ibm_struct *ibm, u32 event)
3651 {
3652 u32 hkey;
3653 bool send_acpi_ev;
3654 bool ignore_acpi_ev;
3655 bool known_ev;
3656
3657 if (event != 0x80) {
3658 pr_err("unknown HKEY notification event %d\n", event);
3659 /* forward it to userspace, maybe it knows how to handle it */
3660 acpi_bus_generate_netlink_event(
3661 ibm->acpi->device->pnp.device_class,
3662 dev_name(&ibm->acpi->device->dev),
3663 event, 0);
3664 return;
3665 }
3666
3667 while (1) {
3668 if (!acpi_evalf(hkey_handle, &hkey, "MHKP", "d")) {
3669 pr_err("failed to retrieve HKEY event\n");
3670 return;
3671 }
3672
3673 if (hkey == 0) {
3674 /* queue empty */
3675 return;
3676 }
3677
3678 send_acpi_ev = true;
3679 ignore_acpi_ev = false;
3680
3681 switch (hkey >> 12) {
3682 case 1:
3683 /* 0x1000-0x1FFF: key presses */
3684 known_ev = hotkey_notify_hotkey(hkey, &send_acpi_ev,
3685 &ignore_acpi_ev);
3686 break;
3687 case 2:
3688 /* 0x2000-0x2FFF: Wakeup reason */
3689 known_ev = hotkey_notify_wakeup(hkey, &send_acpi_ev,
3690 &ignore_acpi_ev);
3691 break;
3692 case 3:
3693 /* 0x3000-0x3FFF: bay-related wakeups */
3694 switch (hkey) {
3695 case TP_HKEY_EV_BAYEJ_ACK:
3696 hotkey_autosleep_ack = 1;
3697 pr_info("bay ejected\n");
3698 hotkey_wakeup_hotunplug_complete_notify_change();
3699 known_ev = true;
3700 break;
3701 case TP_HKEY_EV_OPTDRV_EJ:
3702 /* FIXME: kick libata if SATA link offline */
3703 known_ev = true;
3704 break;
3705 default:
3706 known_ev = false;
3707 }
3708 break;
3709 case 4:
3710 /* 0x4000-0x4FFF: dock-related events */
3711 known_ev = hotkey_notify_dockevent(hkey, &send_acpi_ev,
3712 &ignore_acpi_ev);
3713 break;
3714 case 5:
3715 /* 0x5000-0x5FFF: human interface helpers */
3716 known_ev = hotkey_notify_usrevent(hkey, &send_acpi_ev,
3717 &ignore_acpi_ev);
3718 break;
3719 case 6:
3720 /* 0x6000-0x6FFF: thermal alarms/notices and
3721 * keyboard events */
3722 known_ev = hotkey_notify_6xxx(hkey, &send_acpi_ev,
3723 &ignore_acpi_ev);
3724 break;
3725 case 7:
3726 /* 0x7000-0x7FFF: misc */
3727 if (tp_features.hotkey_wlsw &&
3728 hkey == TP_HKEY_EV_RFKILL_CHANGED) {
3729 tpacpi_send_radiosw_update();
3730 send_acpi_ev = 0;
3731 known_ev = true;
3732 break;
3733 }
3734 /* fallthrough to default */
3735 default:
3736 known_ev = false;
3737 }
3738 if (!known_ev) {
3739 pr_notice("unhandled HKEY event 0x%04x\n", hkey);
3740 pr_notice("please report the conditions when this "
3741 "event happened to %s\n", TPACPI_MAIL);
3742 }
3743
3744 /* Legacy events */
3745 if (!ignore_acpi_ev &&
3746 (send_acpi_ev || hotkey_report_mode < 2)) {
3747 acpi_bus_generate_proc_event(ibm->acpi->device,
3748 event, hkey);
3749 }
3750
3751 /* netlink events */
3752 if (!ignore_acpi_ev && send_acpi_ev) {
3753 acpi_bus_generate_netlink_event(
3754 ibm->acpi->device->pnp.device_class,
3755 dev_name(&ibm->acpi->device->dev),
3756 event, hkey);
3757 }
3758 }
3759 }
3760
3761 static void hotkey_suspend(pm_message_t state)
3762 {
3763 /* Do these on suspend, we get the events on early resume! */
3764 hotkey_wakeup_reason = TP_ACPI_WAKEUP_NONE;
3765 hotkey_autosleep_ack = 0;
3766 }
3767
3768 static void hotkey_resume(void)
3769 {
3770 tpacpi_disable_brightness_delay();
3771
3772 if (hotkey_status_set(true) < 0 ||
3773 hotkey_mask_set(hotkey_acpi_mask) < 0)
3774 pr_err("error while attempting to reset the event "
3775 "firmware interface\n");
3776
3777 tpacpi_send_radiosw_update();
3778 hotkey_tablet_mode_notify_change();
3779 hotkey_wakeup_reason_notify_change();
3780 hotkey_wakeup_hotunplug_complete_notify_change();
3781 hotkey_poll_setup_safe(false);
3782 }
3783
3784 /* procfs -------------------------------------------------------------- */
3785 static int hotkey_read(struct seq_file *m)
3786 {
3787 int res, status;
3788
3789 if (!tp_features.hotkey) {
3790 seq_printf(m, "status:\t\tnot supported\n");
3791 return 0;
3792 }
3793
3794 if (mutex_lock_killable(&hotkey_mutex))
3795 return -ERESTARTSYS;
3796 res = hotkey_status_get(&status);
3797 if (!res)
3798 res = hotkey_mask_get();
3799 mutex_unlock(&hotkey_mutex);
3800 if (res)
3801 return res;
3802
3803 seq_printf(m, "status:\t\t%s\n", enabled(status, 0));
3804 if (hotkey_all_mask) {
3805 seq_printf(m, "mask:\t\t0x%08x\n", hotkey_user_mask);
3806 seq_printf(m, "commands:\tenable, disable, reset, <mask>\n");
3807 } else {
3808 seq_printf(m, "mask:\t\tnot supported\n");
3809 seq_printf(m, "commands:\tenable, disable, reset\n");
3810 }
3811
3812 return 0;
3813 }
3814
3815 static void hotkey_enabledisable_warn(bool enable)
3816 {
3817 tpacpi_log_usertask("procfs hotkey enable/disable");
3818 if (!WARN((tpacpi_lifecycle == TPACPI_LIFE_RUNNING || !enable),
3819 pr_fmt("hotkey enable/disable functionality has been "
3820 "removed from the driver. "
3821 "Hotkeys are always enabled.\n")))
3822 pr_err("Please remove the hotkey=enable module "
3823 "parameter, it is deprecated. "
3824 "Hotkeys are always enabled.\n");
3825 }
3826
3827 static int hotkey_write(char *buf)
3828 {
3829 int res;
3830 u32 mask;
3831 char *cmd;
3832
3833 if (!tp_features.hotkey)
3834 return -ENODEV;
3835
3836 if (mutex_lock_killable(&hotkey_mutex))
3837 return -ERESTARTSYS;
3838
3839 mask = hotkey_user_mask;
3840
3841 res = 0;
3842 while ((cmd = next_cmd(&buf))) {
3843 if (strlencmp(cmd, "enable") == 0) {
3844 hotkey_enabledisable_warn(1);
3845 } else if (strlencmp(cmd, "disable") == 0) {
3846 hotkey_enabledisable_warn(0);
3847 res = -EPERM;
3848 } else if (strlencmp(cmd, "reset") == 0) {
3849 mask = (hotkey_all_mask | hotkey_source_mask)
3850 & ~hotkey_reserved_mask;
3851 } else if (sscanf(cmd, "0x%x", &mask) == 1) {
3852 /* mask set */
3853 } else if (sscanf(cmd, "%x", &mask) == 1) {
3854 /* mask set */
3855 } else {
3856 res = -EINVAL;
3857 goto errexit;
3858 }
3859 }
3860
3861 if (!res) {
3862 tpacpi_disclose_usertask("procfs hotkey",
3863 "set mask to 0x%08x\n", mask);
3864 res = hotkey_user_mask_set(mask);
3865 }
3866
3867 errexit:
3868 mutex_unlock(&hotkey_mutex);
3869 return res;
3870 }
3871
3872 static const struct acpi_device_id ibm_htk_device_ids[] = {
3873 {TPACPI_ACPI_IBM_HKEY_HID, 0},
3874 {TPACPI_ACPI_LENOVO_HKEY_HID, 0},
3875 {"", 0},
3876 };
3877
3878 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver = {
3879 .hid = ibm_htk_device_ids,
3880 .notify = hotkey_notify,
3881 .handle = &hkey_handle,
3882 .type = ACPI_DEVICE_NOTIFY,
3883 };
3884
3885 static struct ibm_struct hotkey_driver_data = {
3886 .name = "hotkey",
3887 .read = hotkey_read,
3888 .write = hotkey_write,
3889 .exit = hotkey_exit,
3890 .resume = hotkey_resume,
3891 .suspend = hotkey_suspend,
3892 .acpi = &ibm_hotkey_acpidriver,
3893 };
3894
3895 /*************************************************************************
3896 * Bluetooth subdriver
3897 */
3898
3899 enum {
3900 /* ACPI GBDC/SBDC bits */
3901 TP_ACPI_BLUETOOTH_HWPRESENT = 0x01, /* Bluetooth hw available */
3902 TP_ACPI_BLUETOOTH_RADIOSSW = 0x02, /* Bluetooth radio enabled */
3903 TP_ACPI_BLUETOOTH_RESUMECTRL = 0x04, /* Bluetooth state at resume:
3904 0 = disable, 1 = enable */
3905 };
3906
3907 enum {
3908 /* ACPI \BLTH commands */
3909 TP_ACPI_BLTH_GET_ULTRAPORT_ID = 0x00, /* Get Ultraport BT ID */
3910 TP_ACPI_BLTH_GET_PWR_ON_RESUME = 0x01, /* Get power-on-resume state */
3911 TP_ACPI_BLTH_PWR_ON_ON_RESUME = 0x02, /* Resume powered on */
3912 TP_ACPI_BLTH_PWR_OFF_ON_RESUME = 0x03, /* Resume powered off */
3913 TP_ACPI_BLTH_SAVE_STATE = 0x05, /* Save state for S4/S5 */
3914 };
3915
3916 #define TPACPI_RFK_BLUETOOTH_SW_NAME "tpacpi_bluetooth_sw"
3917
3918 static int bluetooth_get_status(void)
3919 {
3920 int status;
3921
3922 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3923 if (dbg_bluetoothemul)
3924 return (tpacpi_bluetooth_emulstate) ?
3925 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
3926 #endif
3927
3928 if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
3929 return -EIO;
3930
3931 return ((status & TP_ACPI_BLUETOOTH_RADIOSSW) != 0) ?
3932 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
3933 }
3934
3935 static int bluetooth_set_status(enum tpacpi_rfkill_state state)
3936 {
3937 int status;
3938
3939 vdbg_printk(TPACPI_DBG_RFKILL,
3940 "will attempt to %s bluetooth\n",
3941 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable");
3942
3943 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3944 if (dbg_bluetoothemul) {
3945 tpacpi_bluetooth_emulstate = (state == TPACPI_RFK_RADIO_ON);
3946 return 0;
3947 }
3948 #endif
3949
3950 if (state == TPACPI_RFK_RADIO_ON)
3951 status = TP_ACPI_BLUETOOTH_RADIOSSW
3952 | TP_ACPI_BLUETOOTH_RESUMECTRL;
3953 else
3954 status = 0;
3955
3956 if (!acpi_evalf(hkey_handle, NULL, "SBDC", "vd", status))
3957 return -EIO;
3958
3959 return 0;
3960 }
3961
3962 /* sysfs bluetooth enable ---------------------------------------------- */
3963 static ssize_t bluetooth_enable_show(struct device *dev,
3964 struct device_attribute *attr,
3965 char *buf)
3966 {
3967 return tpacpi_rfk_sysfs_enable_show(TPACPI_RFK_BLUETOOTH_SW_ID,
3968 attr, buf);
3969 }
3970
3971 static ssize_t bluetooth_enable_store(struct device *dev,
3972 struct device_attribute *attr,
3973 const char *buf, size_t count)
3974 {
3975 return tpacpi_rfk_sysfs_enable_store(TPACPI_RFK_BLUETOOTH_SW_ID,
3976 attr, buf, count);
3977 }
3978
3979 static struct device_attribute dev_attr_bluetooth_enable =
3980 __ATTR(bluetooth_enable, S_IWUSR | S_IRUGO,
3981 bluetooth_enable_show, bluetooth_enable_store);
3982
3983 /* --------------------------------------------------------------------- */
3984
3985 static struct attribute *bluetooth_attributes[] = {
3986 &dev_attr_bluetooth_enable.attr,
3987 NULL
3988 };
3989
3990 static const struct attribute_group bluetooth_attr_group = {
3991 .attrs = bluetooth_attributes,
3992 };
3993
3994 static const struct tpacpi_rfk_ops bluetooth_tprfk_ops = {
3995 .get_status = bluetooth_get_status,
3996 .set_status = bluetooth_set_status,
3997 };
3998
3999 static void bluetooth_shutdown(void)
4000 {
4001 /* Order firmware to save current state to NVRAM */
4002 if (!acpi_evalf(NULL, NULL, "\\BLTH", "vd",
4003 TP_ACPI_BLTH_SAVE_STATE))
4004 pr_notice("failed to save bluetooth state to NVRAM\n");
4005 else
4006 vdbg_printk(TPACPI_DBG_RFKILL,
4007 "bluestooth state saved to NVRAM\n");
4008 }
4009
4010 static void bluetooth_exit(void)
4011 {
4012 sysfs_remove_group(&tpacpi_pdev->dev.kobj,
4013 &bluetooth_attr_group);
4014
4015 tpacpi_destroy_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID);
4016
4017 bluetooth_shutdown();
4018 }
4019
4020 static int __init bluetooth_init(struct ibm_init_struct *iibm)
4021 {
4022 int res;
4023 int status = 0;
4024
4025 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4026 "initializing bluetooth subdriver\n");
4027
4028 TPACPI_ACPIHANDLE_INIT(hkey);
4029
4030 /* bluetooth not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
4031 G4x, R30, R31, R40e, R50e, T20-22, X20-21 */
4032 tp_features.bluetooth = hkey_handle &&
4033 acpi_evalf(hkey_handle, &status, "GBDC", "qd");
4034
4035 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4036 "bluetooth is %s, status 0x%02x\n",
4037 str_supported(tp_features.bluetooth),
4038 status);
4039
4040 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4041 if (dbg_bluetoothemul) {
4042 tp_features.bluetooth = 1;
4043 pr_info("bluetooth switch emulation enabled\n");
4044 } else
4045 #endif
4046 if (tp_features.bluetooth &&
4047 !(status & TP_ACPI_BLUETOOTH_HWPRESENT)) {
4048 /* no bluetooth hardware present in system */
4049 tp_features.bluetooth = 0;
4050 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4051 "bluetooth hardware not installed\n");
4052 }
4053
4054 if (!tp_features.bluetooth)
4055 return 1;
4056
4057 res = tpacpi_new_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID,
4058 &bluetooth_tprfk_ops,
4059 RFKILL_TYPE_BLUETOOTH,
4060 TPACPI_RFK_BLUETOOTH_SW_NAME,
4061 true);
4062 if (res)
4063 return res;
4064
4065 res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
4066 &bluetooth_attr_group);
4067 if (res) {
4068 tpacpi_destroy_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID);
4069 return res;
4070 }
4071
4072 return 0;
4073 }
4074
4075 /* procfs -------------------------------------------------------------- */
4076 static int bluetooth_read(struct seq_file *m)
4077 {
4078 return tpacpi_rfk_procfs_read(TPACPI_RFK_BLUETOOTH_SW_ID, m);
4079 }
4080
4081 static int bluetooth_write(char *buf)
4082 {
4083 return tpacpi_rfk_procfs_write(TPACPI_RFK_BLUETOOTH_SW_ID, buf);
4084 }
4085
4086 static struct ibm_struct bluetooth_driver_data = {
4087 .name = "bluetooth",
4088 .read = bluetooth_read,
4089 .write = bluetooth_write,
4090 .exit = bluetooth_exit,
4091 .shutdown = bluetooth_shutdown,
4092 };
4093
4094 /*************************************************************************
4095 * Wan subdriver
4096 */
4097
4098 enum {
4099 /* ACPI GWAN/SWAN bits */
4100 TP_ACPI_WANCARD_HWPRESENT = 0x01, /* Wan hw available */
4101 TP_ACPI_WANCARD_RADIOSSW = 0x02, /* Wan radio enabled */
4102 TP_ACPI_WANCARD_RESUMECTRL = 0x04, /* Wan state at resume:
4103 0 = disable, 1 = enable */
4104 };
4105
4106 #define TPACPI_RFK_WWAN_SW_NAME "tpacpi_wwan_sw"
4107
4108 static int wan_get_status(void)
4109 {
4110 int status;
4111
4112 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4113 if (dbg_wwanemul)
4114 return (tpacpi_wwan_emulstate) ?
4115 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4116 #endif
4117
4118 if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
4119 return -EIO;
4120
4121 return ((status & TP_ACPI_WANCARD_RADIOSSW) != 0) ?
4122 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4123 }
4124
4125 static int wan_set_status(enum tpacpi_rfkill_state state)
4126 {
4127 int status;
4128
4129 vdbg_printk(TPACPI_DBG_RFKILL,
4130 "will attempt to %s wwan\n",
4131 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable");
4132
4133 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4134 if (dbg_wwanemul) {
4135 tpacpi_wwan_emulstate = (state == TPACPI_RFK_RADIO_ON);
4136 return 0;
4137 }
4138 #endif
4139
4140 if (state == TPACPI_RFK_RADIO_ON)
4141 status = TP_ACPI_WANCARD_RADIOSSW
4142 | TP_ACPI_WANCARD_RESUMECTRL;
4143 else
4144 status = 0;
4145
4146 if (!acpi_evalf(hkey_handle, NULL, "SWAN", "vd", status))
4147 return -EIO;
4148
4149 return 0;
4150 }
4151
4152 /* sysfs wan enable ---------------------------------------------------- */
4153 static ssize_t wan_enable_show(struct device *dev,
4154 struct device_attribute *attr,
4155 char *buf)
4156 {
4157 return tpacpi_rfk_sysfs_enable_show(TPACPI_RFK_WWAN_SW_ID,
4158 attr, buf);
4159 }
4160
4161 static ssize_t wan_enable_store(struct device *dev,
4162 struct device_attribute *attr,
4163 const char *buf, size_t count)
4164 {
4165 return tpacpi_rfk_sysfs_enable_store(TPACPI_RFK_WWAN_SW_ID,
4166 attr, buf, count);
4167 }
4168
4169 static struct device_attribute dev_attr_wan_enable =
4170 __ATTR(wwan_enable, S_IWUSR | S_IRUGO,
4171 wan_enable_show, wan_enable_store);
4172
4173 /* --------------------------------------------------------------------- */
4174
4175 static struct attribute *wan_attributes[] = {
4176 &dev_attr_wan_enable.attr,
4177 NULL
4178 };
4179
4180 static const struct attribute_group wan_attr_group = {
4181 .attrs = wan_attributes,
4182 };
4183
4184 static const struct tpacpi_rfk_ops wan_tprfk_ops = {
4185 .get_status = wan_get_status,
4186 .set_status = wan_set_status,
4187 };
4188
4189 static void wan_shutdown(void)
4190 {
4191 /* Order firmware to save current state to NVRAM */
4192 if (!acpi_evalf(NULL, NULL, "\\WGSV", "vd",
4193 TP_ACPI_WGSV_SAVE_STATE))
4194 pr_notice("failed to save WWAN state to NVRAM\n");
4195 else
4196 vdbg_printk(TPACPI_DBG_RFKILL,
4197 "WWAN state saved to NVRAM\n");
4198 }
4199
4200 static void wan_exit(void)
4201 {
4202 sysfs_remove_group(&tpacpi_pdev->dev.kobj,
4203 &wan_attr_group);
4204
4205 tpacpi_destroy_rfkill(TPACPI_RFK_WWAN_SW_ID);
4206
4207 wan_shutdown();
4208 }
4209
4210 static int __init wan_init(struct ibm_init_struct *iibm)
4211 {
4212 int res;
4213 int status = 0;
4214
4215 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4216 "initializing wan subdriver\n");
4217
4218 TPACPI_ACPIHANDLE_INIT(hkey);
4219
4220 tp_features.wan = hkey_handle &&
4221 acpi_evalf(hkey_handle, &status, "GWAN", "qd");
4222
4223 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4224 "wan is %s, status 0x%02x\n",
4225 str_supported(tp_features.wan),
4226 status);
4227
4228 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4229 if (dbg_wwanemul) {
4230 tp_features.wan = 1;
4231 pr_info("wwan switch emulation enabled\n");
4232 } else
4233 #endif
4234 if (tp_features.wan &&
4235 !(status & TP_ACPI_WANCARD_HWPRESENT)) {
4236 /* no wan hardware present in system */
4237 tp_features.wan = 0;
4238 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4239 "wan hardware not installed\n");
4240 }
4241
4242 if (!tp_features.wan)
4243 return 1;
4244
4245 res = tpacpi_new_rfkill(TPACPI_RFK_WWAN_SW_ID,
4246 &wan_tprfk_ops,
4247 RFKILL_TYPE_WWAN,
4248 TPACPI_RFK_WWAN_SW_NAME,
4249 true);
4250 if (res)
4251 return res;
4252
4253 res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
4254 &wan_attr_group);
4255
4256 if (res) {
4257 tpacpi_destroy_rfkill(TPACPI_RFK_WWAN_SW_ID);
4258 return res;
4259 }
4260
4261 return 0;
4262 }
4263
4264 /* procfs -------------------------------------------------------------- */
4265 static int wan_read(struct seq_file *m)
4266 {
4267 return tpacpi_rfk_procfs_read(TPACPI_RFK_WWAN_SW_ID, m);
4268 }
4269
4270 static int wan_write(char *buf)
4271 {
4272 return tpacpi_rfk_procfs_write(TPACPI_RFK_WWAN_SW_ID, buf);
4273 }
4274
4275 static struct ibm_struct wan_driver_data = {
4276 .name = "wan",
4277 .read = wan_read,
4278 .write = wan_write,
4279 .exit = wan_exit,
4280 .shutdown = wan_shutdown,
4281 };
4282
4283 /*************************************************************************
4284 * UWB subdriver
4285 */
4286
4287 enum {
4288 /* ACPI GUWB/SUWB bits */
4289 TP_ACPI_UWB_HWPRESENT = 0x01, /* UWB hw available */
4290 TP_ACPI_UWB_RADIOSSW = 0x02, /* UWB radio enabled */
4291 };
4292
4293 #define TPACPI_RFK_UWB_SW_NAME "tpacpi_uwb_sw"
4294
4295 static int uwb_get_status(void)
4296 {
4297 int status;
4298
4299 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4300 if (dbg_uwbemul)
4301 return (tpacpi_uwb_emulstate) ?
4302 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4303 #endif
4304
4305 if (!acpi_evalf(hkey_handle, &status, "GUWB", "d"))
4306 return -EIO;
4307
4308 return ((status & TP_ACPI_UWB_RADIOSSW) != 0) ?
4309 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4310 }
4311
4312 static int uwb_set_status(enum tpacpi_rfkill_state state)
4313 {
4314 int status;
4315
4316 vdbg_printk(TPACPI_DBG_RFKILL,
4317 "will attempt to %s UWB\n",
4318 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable");
4319
4320 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4321 if (dbg_uwbemul) {
4322 tpacpi_uwb_emulstate = (state == TPACPI_RFK_RADIO_ON);
4323 return 0;
4324 }
4325 #endif
4326
4327 if (state == TPACPI_RFK_RADIO_ON)
4328 status = TP_ACPI_UWB_RADIOSSW;
4329 else
4330 status = 0;
4331
4332 if (!acpi_evalf(hkey_handle, NULL, "SUWB", "vd", status))
4333 return -EIO;
4334
4335 return 0;
4336 }
4337
4338 /* --------------------------------------------------------------------- */
4339
4340 static const struct tpacpi_rfk_ops uwb_tprfk_ops = {
4341 .get_status = uwb_get_status,
4342 .set_status = uwb_set_status,
4343 };
4344
4345 static void uwb_exit(void)
4346 {
4347 tpacpi_destroy_rfkill(TPACPI_RFK_UWB_SW_ID);
4348 }
4349
4350 static int __init uwb_init(struct ibm_init_struct *iibm)
4351 {
4352 int res;
4353 int status = 0;
4354
4355 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4356 "initializing uwb subdriver\n");
4357
4358 TPACPI_ACPIHANDLE_INIT(hkey);
4359
4360 tp_features.uwb = hkey_handle &&
4361 acpi_evalf(hkey_handle, &status, "GUWB", "qd");
4362
4363 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4364 "uwb is %s, status 0x%02x\n",
4365 str_supported(tp_features.uwb),
4366 status);
4367
4368 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4369 if (dbg_uwbemul) {
4370 tp_features.uwb = 1;
4371 pr_info("uwb switch emulation enabled\n");
4372 } else
4373 #endif
4374 if (tp_features.uwb &&
4375 !(status & TP_ACPI_UWB_HWPRESENT)) {
4376 /* no uwb hardware present in system */
4377 tp_features.uwb = 0;
4378 dbg_printk(TPACPI_DBG_INIT,
4379 "uwb hardware not installed\n");
4380 }
4381
4382 if (!tp_features.uwb)
4383 return 1;
4384
4385 res = tpacpi_new_rfkill(TPACPI_RFK_UWB_SW_ID,
4386 &uwb_tprfk_ops,
4387 RFKILL_TYPE_UWB,
4388 TPACPI_RFK_UWB_SW_NAME,
4389 false);
4390 return res;
4391 }
4392
4393 static struct ibm_struct uwb_driver_data = {
4394 .name = "uwb",
4395 .exit = uwb_exit,
4396 .flags.experimental = 1,
4397 };
4398
4399 /*************************************************************************
4400 * Video subdriver
4401 */
4402
4403 #ifdef CONFIG_THINKPAD_ACPI_VIDEO
4404
4405 enum video_access_mode {
4406 TPACPI_VIDEO_NONE = 0,
4407 TPACPI_VIDEO_570, /* 570 */
4408 TPACPI_VIDEO_770, /* 600e/x, 770e, 770x */
4409 TPACPI_VIDEO_NEW, /* all others */
4410 };
4411
4412 enum { /* video status flags, based on VIDEO_570 */
4413 TP_ACPI_VIDEO_S_LCD = 0x01, /* LCD output enabled */
4414 TP_ACPI_VIDEO_S_CRT = 0x02, /* CRT output enabled */
4415 TP_ACPI_VIDEO_S_DVI = 0x08, /* DVI output enabled */
4416 };
4417
4418 enum { /* TPACPI_VIDEO_570 constants */
4419 TP_ACPI_VIDEO_570_PHSCMD = 0x87, /* unknown magic constant :( */
4420 TP_ACPI_VIDEO_570_PHSMASK = 0x03, /* PHS bits that map to
4421 * video_status_flags */
4422 TP_ACPI_VIDEO_570_PHS2CMD = 0x8b, /* unknown magic constant :( */
4423 TP_ACPI_VIDEO_570_PHS2SET = 0x80, /* unknown magic constant :( */
4424 };
4425
4426 static enum video_access_mode video_supported;
4427 static int video_orig_autosw;
4428
4429 static int video_autosw_get(void);
4430 static int video_autosw_set(int enable);
4431
4432 TPACPI_HANDLE(vid, root,
4433 "\\_SB.PCI.AGP.VGA", /* 570 */
4434 "\\_SB.PCI0.AGP0.VID0", /* 600e/x, 770x */
4435 "\\_SB.PCI0.VID0", /* 770e */
4436 "\\_SB.PCI0.VID", /* A21e, G4x, R50e, X30, X40 */
4437 "\\_SB.PCI0.AGP.VGA", /* X100e and a few others */
4438 "\\_SB.PCI0.AGP.VID", /* all others */
4439 ); /* R30, R31 */
4440
4441 TPACPI_HANDLE(vid2, root, "\\_SB.PCI0.AGPB.VID"); /* G41 */
4442
4443 static int __init video_init(struct ibm_init_struct *iibm)
4444 {
4445 int ivga;
4446
4447 vdbg_printk(TPACPI_DBG_INIT, "initializing video subdriver\n");
4448
4449 TPACPI_ACPIHANDLE_INIT(vid);
4450 if (tpacpi_is_ibm())
4451 TPACPI_ACPIHANDLE_INIT(vid2);
4452
4453 if (vid2_handle && acpi_evalf(NULL, &ivga, "\\IVGA", "d") && ivga)
4454 /* G41, assume IVGA doesn't change */
4455 vid_handle = vid2_handle;
4456
4457 if (!vid_handle)
4458 /* video switching not supported on R30, R31 */
4459 video_supported = TPACPI_VIDEO_NONE;
4460 else if (tpacpi_is_ibm() &&
4461 acpi_evalf(vid_handle, &video_orig_autosw, "SWIT", "qd"))
4462 /* 570 */
4463 video_supported = TPACPI_VIDEO_570;
4464 else if (tpacpi_is_ibm() &&
4465 acpi_evalf(vid_handle, &video_orig_autosw, "^VADL", "qd"))
4466 /* 600e/x, 770e, 770x */
4467 video_supported = TPACPI_VIDEO_770;
4468 else
4469 /* all others */
4470 video_supported = TPACPI_VIDEO_NEW;
4471
4472 vdbg_printk(TPACPI_DBG_INIT, "video is %s, mode %d\n",
4473 str_supported(video_supported != TPACPI_VIDEO_NONE),
4474 video_supported);
4475
4476 return (video_supported != TPACPI_VIDEO_NONE)? 0 : 1;
4477 }
4478
4479 static void video_exit(void)
4480 {
4481 dbg_printk(TPACPI_DBG_EXIT,
4482 "restoring original video autoswitch mode\n");
4483 if (video_autosw_set(video_orig_autosw))
4484 pr_err("error while trying to restore original "
4485 "video autoswitch mode\n");
4486 }
4487
4488 static int video_outputsw_get(void)
4489 {
4490 int status = 0;
4491 int i;
4492
4493 switch (video_supported) {
4494 case TPACPI_VIDEO_570:
4495 if (!acpi_evalf(NULL, &i, "\\_SB.PHS", "dd",
4496 TP_ACPI_VIDEO_570_PHSCMD))
4497 return -EIO;
4498 status = i & TP_ACPI_VIDEO_570_PHSMASK;
4499 break;
4500 case TPACPI_VIDEO_770:
4501 if (!acpi_evalf(NULL, &i, "\\VCDL", "d"))
4502 return -EIO;
4503 if (i)
4504 status |= TP_ACPI_VIDEO_S_LCD;
4505 if (!acpi_evalf(NULL, &i, "\\VCDC", "d"))
4506 return -EIO;
4507 if (i)
4508 status |= TP_ACPI_VIDEO_S_CRT;
4509 break;
4510 case TPACPI_VIDEO_NEW:
4511 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 1) ||
4512 !acpi_evalf(NULL, &i, "\\VCDC", "d"))
4513 return -EIO;
4514 if (i)
4515 status |= TP_ACPI_VIDEO_S_CRT;
4516
4517 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0) ||
4518 !acpi_evalf(NULL, &i, "\\VCDL", "d"))
4519 return -EIO;
4520 if (i)
4521 status |= TP_ACPI_VIDEO_S_LCD;
4522 if (!acpi_evalf(NULL, &i, "\\VCDD", "d"))
4523 return -EIO;
4524 if (i)
4525 status |= TP_ACPI_VIDEO_S_DVI;
4526 break;
4527 default:
4528 return -ENOSYS;
4529 }
4530
4531 return status;
4532 }
4533
4534 static int video_outputsw_set(int status)
4535 {
4536 int autosw;
4537 int res = 0;
4538
4539 switch (video_supported) {
4540 case TPACPI_VIDEO_570:
4541 res = acpi_evalf(NULL, NULL,
4542 "\\_SB.PHS2", "vdd",
4543 TP_ACPI_VIDEO_570_PHS2CMD,
4544 status | TP_ACPI_VIDEO_570_PHS2SET);
4545 break;
4546 case TPACPI_VIDEO_770:
4547 autosw = video_autosw_get();
4548 if (autosw < 0)
4549 return autosw;
4550
4551 res = video_autosw_set(1);
4552 if (res)
4553 return res;
4554 res = acpi_evalf(vid_handle, NULL,
4555 "ASWT", "vdd", status * 0x100, 0);
4556 if (!autosw && video_autosw_set(autosw)) {
4557 pr_err("video auto-switch left enabled due to error\n");
4558 return -EIO;
4559 }
4560 break;
4561 case TPACPI_VIDEO_NEW:
4562 res = acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0x80) &&
4563 acpi_evalf(NULL, NULL, "\\VSDS", "vdd", status, 1);
4564 break;
4565 default:
4566 return -ENOSYS;
4567 }
4568
4569 return (res)? 0 : -EIO;
4570 }
4571
4572 static int video_autosw_get(void)
4573 {
4574 int autosw = 0;
4575
4576 switch (video_supported) {
4577 case TPACPI_VIDEO_570:
4578 if (!acpi_evalf(vid_handle, &autosw, "SWIT", "d"))
4579 return -EIO;
4580 break;
4581 case TPACPI_VIDEO_770:
4582 case TPACPI_VIDEO_NEW:
4583 if (!acpi_evalf(vid_handle, &autosw, "^VDEE", "d"))
4584 return -EIO;
4585 break;
4586 default:
4587 return -ENOSYS;
4588 }
4589
4590 return autosw & 1;
4591 }
4592
4593 static int video_autosw_set(int enable)
4594 {
4595 if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", (enable)? 1 : 0))
4596 return -EIO;
4597 return 0;
4598 }
4599
4600 static int video_outputsw_cycle(void)
4601 {
4602 int autosw = video_autosw_get();
4603 int res;
4604
4605 if (autosw < 0)
4606 return autosw;
4607
4608 switch (video_supported) {
4609 case TPACPI_VIDEO_570:
4610 res = video_autosw_set(1);
4611 if (res)
4612 return res;
4613 res = acpi_evalf(ec_handle, NULL, "_Q16", "v");
4614 break;
4615 case TPACPI_VIDEO_770:
4616 case TPACPI_VIDEO_NEW:
4617 res = video_autosw_set(1);
4618 if (res)
4619 return res;
4620 res = acpi_evalf(vid_handle, NULL, "VSWT", "v");
4621 break;
4622 default:
4623 return -ENOSYS;
4624 }
4625 if (!autosw && video_autosw_set(autosw)) {
4626 pr_err("video auto-switch left enabled due to error\n");
4627 return -EIO;
4628 }
4629
4630 return (res)? 0 : -EIO;
4631 }
4632
4633 static int video_expand_toggle(void)
4634 {
4635 switch (video_supported) {
4636 case TPACPI_VIDEO_570:
4637 return acpi_evalf(ec_handle, NULL, "_Q17", "v")?
4638 0 : -EIO;
4639 case TPACPI_VIDEO_770:
4640 return acpi_evalf(vid_handle, NULL, "VEXP", "v")?
4641 0 : -EIO;
4642 case TPACPI_VIDEO_NEW:
4643 return acpi_evalf(NULL, NULL, "\\VEXP", "v")?
4644 0 : -EIO;
4645 default:
4646 return -ENOSYS;
4647 }
4648 /* not reached */
4649 }
4650
4651 static int video_read(struct seq_file *m)
4652 {
4653 int status, autosw;
4654
4655 if (video_supported == TPACPI_VIDEO_NONE) {
4656 seq_printf(m, "status:\t\tnot supported\n");
4657 return 0;
4658 }
4659
4660 /* Even reads can crash X.org, so... */
4661 if (!capable(CAP_SYS_ADMIN))
4662 return -EPERM;
4663
4664 status = video_outputsw_get();
4665 if (status < 0)
4666 return status;
4667
4668 autosw = video_autosw_get();
4669 if (autosw < 0)
4670 return autosw;
4671
4672 seq_printf(m, "status:\t\tsupported\n");
4673 seq_printf(m, "lcd:\t\t%s\n", enabled(status, 0));
4674 seq_printf(m, "crt:\t\t%s\n", enabled(status, 1));
4675 if (video_supported == TPACPI_VIDEO_NEW)
4676 seq_printf(m, "dvi:\t\t%s\n", enabled(status, 3));
4677 seq_printf(m, "auto:\t\t%s\n", enabled(autosw, 0));
4678 seq_printf(m, "commands:\tlcd_enable, lcd_disable\n");
4679 seq_printf(m, "commands:\tcrt_enable, crt_disable\n");
4680 if (video_supported == TPACPI_VIDEO_NEW)
4681 seq_printf(m, "commands:\tdvi_enable, dvi_disable\n");
4682 seq_printf(m, "commands:\tauto_enable, auto_disable\n");
4683 seq_printf(m, "commands:\tvideo_switch, expand_toggle\n");
4684
4685 return 0;
4686 }
4687
4688 static int video_write(char *buf)
4689 {
4690 char *cmd;
4691 int enable, disable, status;
4692 int res;
4693
4694 if (video_supported == TPACPI_VIDEO_NONE)
4695 return -ENODEV;
4696
4697 /* Even reads can crash X.org, let alone writes... */
4698 if (!capable(CAP_SYS_ADMIN))
4699 return -EPERM;
4700
4701 enable = 0;
4702 disable = 0;
4703
4704 while ((cmd = next_cmd(&buf))) {
4705 if (strlencmp(cmd, "lcd_enable") == 0) {
4706 enable |= TP_ACPI_VIDEO_S_LCD;
4707 } else if (strlencmp(cmd, "lcd_disable") == 0) {
4708 disable |= TP_ACPI_VIDEO_S_LCD;
4709 } else if (strlencmp(cmd, "crt_enable") == 0) {
4710 enable |= TP_ACPI_VIDEO_S_CRT;
4711 } else if (strlencmp(cmd, "crt_disable") == 0) {
4712 disable |= TP_ACPI_VIDEO_S_CRT;
4713 } else if (video_supported == TPACPI_VIDEO_NEW &&
4714 strlencmp(cmd, "dvi_enable") == 0) {
4715 enable |= TP_ACPI_VIDEO_S_DVI;
4716 } else if (video_supported == TPACPI_VIDEO_NEW &&
4717 strlencmp(cmd, "dvi_disable") == 0) {
4718 disable |= TP_ACPI_VIDEO_S_DVI;
4719 } else if (strlencmp(cmd, "auto_enable") == 0) {
4720 res = video_autosw_set(1);
4721 if (res)
4722 return res;
4723 } else if (strlencmp(cmd, "auto_disable") == 0) {
4724 res = video_autosw_set(0);
4725 if (res)
4726 return res;
4727 } else if (strlencmp(cmd, "video_switch") == 0) {
4728 res = video_outputsw_cycle();
4729 if (res)
4730 return res;
4731 } else if (strlencmp(cmd, "expand_toggle") == 0) {
4732 res = video_expand_toggle();
4733 if (res)
4734 return res;
4735 } else
4736 return -EINVAL;
4737 }
4738
4739 if (enable || disable) {
4740 status = video_outputsw_get();
4741 if (status < 0)
4742 return status;
4743 res = video_outputsw_set((status & ~disable) | enable);
4744 if (res)
4745 return res;
4746 }
4747
4748 return 0;
4749 }
4750
4751 static struct ibm_struct video_driver_data = {
4752 .name = "video",
4753 .read = video_read,
4754 .write = video_write,
4755 .exit = video_exit,
4756 };
4757
4758 #endif /* CONFIG_THINKPAD_ACPI_VIDEO */
4759
4760 /*************************************************************************
4761 * Light (thinklight) subdriver
4762 */
4763
4764 TPACPI_HANDLE(lght, root, "\\LGHT"); /* A21e, A2xm/p, T20-22, X20-21 */
4765 TPACPI_HANDLE(ledb, ec, "LEDB"); /* G4x */
4766
4767 static int light_get_status(void)
4768 {
4769 int status = 0;
4770
4771 if (tp_features.light_status) {
4772 if (!acpi_evalf(ec_handle, &status, "KBLT", "d"))
4773 return -EIO;
4774 return (!!status);
4775 }
4776
4777 return -ENXIO;
4778 }
4779
4780 static int light_set_status(int status)
4781 {
4782 int rc;
4783
4784 if (tp_features.light) {
4785 if (cmos_handle) {
4786 rc = acpi_evalf(cmos_handle, NULL, NULL, "vd",
4787 (status)?
4788 TP_CMOS_THINKLIGHT_ON :
4789 TP_CMOS_THINKLIGHT_OFF);
4790 } else {
4791 rc = acpi_evalf(lght_handle, NULL, NULL, "vd",
4792 (status)? 1 : 0);
4793 }
4794 return (rc)? 0 : -EIO;
4795 }
4796
4797 return -ENXIO;
4798 }
4799
4800 static void light_set_status_worker(struct work_struct *work)
4801 {
4802 struct tpacpi_led_classdev *data =
4803 container_of(work, struct tpacpi_led_classdev, work);
4804
4805 if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING))
4806 light_set_status((data->new_state != TPACPI_LED_OFF));
4807 }
4808
4809 static void light_sysfs_set(struct led_classdev *led_cdev,
4810 enum led_brightness brightness)
4811 {
4812 struct tpacpi_led_classdev *data =
4813 container_of(led_cdev,
4814 struct tpacpi_led_classdev,
4815 led_classdev);
4816 data->new_state = (brightness != LED_OFF) ?
4817 TPACPI_LED_ON : TPACPI_LED_OFF;
4818 queue_work(tpacpi_wq, &data->work);
4819 }
4820
4821 static enum led_brightness light_sysfs_get(struct led_classdev *led_cdev)
4822 {
4823 return (light_get_status() == 1)? LED_FULL : LED_OFF;
4824 }
4825
4826 static struct tpacpi_led_classdev tpacpi_led_thinklight = {
4827 .led_classdev = {
4828 .name = "tpacpi::thinklight",
4829 .brightness_set = &light_sysfs_set,
4830 .brightness_get = &light_sysfs_get,
4831 }
4832 };
4833
4834 static int __init light_init(struct ibm_init_struct *iibm)
4835 {
4836 int rc;
4837
4838 vdbg_printk(TPACPI_DBG_INIT, "initializing light subdriver\n");
4839
4840 if (tpacpi_is_ibm()) {
4841 TPACPI_ACPIHANDLE_INIT(ledb);
4842 TPACPI_ACPIHANDLE_INIT(lght);
4843 }
4844 TPACPI_ACPIHANDLE_INIT(cmos);
4845 INIT_WORK(&tpacpi_led_thinklight.work, light_set_status_worker);
4846
4847 /* light not supported on 570, 600e/x, 770e, 770x, G4x, R30, R31 */
4848 tp_features.light = (cmos_handle || lght_handle) && !ledb_handle;
4849
4850 if (tp_features.light)
4851 /* light status not supported on
4852 570, 600e/x, 770e, 770x, G4x, R30, R31, R32, X20 */
4853 tp_features.light_status =
4854 acpi_evalf(ec_handle, NULL, "KBLT", "qv");
4855
4856 vdbg_printk(TPACPI_DBG_INIT, "light is %s, light status is %s\n",
4857 str_supported(tp_features.light),
4858 str_supported(tp_features.light_status));
4859
4860 if (!tp_features.light)
4861 return 1;
4862
4863 rc = led_classdev_register(&tpacpi_pdev->dev,
4864 &tpacpi_led_thinklight.led_classdev);
4865
4866 if (rc < 0) {
4867 tp_features.light = 0;
4868 tp_features.light_status = 0;
4869 } else {
4870 rc = 0;
4871 }
4872
4873 return rc;
4874 }
4875
4876 static void light_exit(void)
4877 {
4878 led_classdev_unregister(&tpacpi_led_thinklight.led_classdev);
4879 if (work_pending(&tpacpi_led_thinklight.work))
4880 flush_workqueue(tpacpi_wq);
4881 }
4882
4883 static int light_read(struct seq_file *m)
4884 {
4885 int status;
4886
4887 if (!tp_features.light) {
4888 seq_printf(m, "status:\t\tnot supported\n");
4889 } else if (!tp_features.light_status) {
4890 seq_printf(m, "status:\t\tunknown\n");
4891 seq_printf(m, "commands:\ton, off\n");
4892 } else {
4893 status = light_get_status();
4894 if (status < 0)
4895 return status;
4896 seq_printf(m, "status:\t\t%s\n", onoff(status, 0));
4897 seq_printf(m, "commands:\ton, off\n");
4898 }
4899
4900 return 0;
4901 }
4902
4903 static int light_write(char *buf)
4904 {
4905 char *cmd;
4906 int newstatus = 0;
4907
4908 if (!tp_features.light)
4909 return -ENODEV;
4910
4911 while ((cmd = next_cmd(&buf))) {
4912 if (strlencmp(cmd, "on") == 0) {
4913 newstatus = 1;
4914 } else if (strlencmp(cmd, "off") == 0) {
4915 newstatus = 0;
4916 } else
4917 return -EINVAL;
4918 }
4919
4920 return light_set_status(newstatus);
4921 }
4922
4923 static struct ibm_struct light_driver_data = {
4924 .name = "light",
4925 .read = light_read,
4926 .write = light_write,
4927 .exit = light_exit,
4928 };
4929
4930 /*************************************************************************
4931 * CMOS subdriver
4932 */
4933
4934 /* sysfs cmos_command -------------------------------------------------- */
4935 static ssize_t cmos_command_store(struct device *dev,
4936 struct device_attribute *attr,
4937 const char *buf, size_t count)
4938 {
4939 unsigned long cmos_cmd;
4940 int res;
4941
4942 if (parse_strtoul(buf, 21, &cmos_cmd))
4943 return -EINVAL;
4944
4945 res = issue_thinkpad_cmos_command(cmos_cmd);
4946 return (res)? res : count;
4947 }
4948
4949 static struct device_attribute dev_attr_cmos_command =
4950 __ATTR(cmos_command, S_IWUSR, NULL, cmos_command_store);
4951
4952 /* --------------------------------------------------------------------- */
4953
4954 static int __init cmos_init(struct ibm_init_struct *iibm)
4955 {
4956 int res;
4957
4958 vdbg_printk(TPACPI_DBG_INIT,
4959 "initializing cmos commands subdriver\n");
4960
4961 TPACPI_ACPIHANDLE_INIT(cmos);
4962
4963 vdbg_printk(TPACPI_DBG_INIT, "cmos commands are %s\n",
4964 str_supported(cmos_handle != NULL));
4965
4966 res = device_create_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
4967 if (res)
4968 return res;
4969
4970 return (cmos_handle)? 0 : 1;
4971 }
4972
4973 static void cmos_exit(void)
4974 {
4975 device_remove_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
4976 }
4977
4978 static int cmos_read(struct seq_file *m)
4979 {
4980 /* cmos not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
4981 R30, R31, T20-22, X20-21 */
4982 if (!cmos_handle)
4983 seq_printf(m, "status:\t\tnot supported\n");
4984 else {
4985 seq_printf(m, "status:\t\tsupported\n");
4986 seq_printf(m, "commands:\t<cmd> (<cmd> is 0-21)\n");
4987 }
4988
4989 return 0;
4990 }
4991
4992 static int cmos_write(char *buf)
4993 {
4994 char *cmd;
4995 int cmos_cmd, res;
4996
4997 while ((cmd = next_cmd(&buf))) {
4998 if (sscanf(cmd, "%u", &cmos_cmd) == 1 &&
4999 cmos_cmd >= 0 && cmos_cmd <= 21) {
5000 /* cmos_cmd set */
5001 } else
5002 return -EINVAL;
5003
5004 res = issue_thinkpad_cmos_command(cmos_cmd);
5005 if (res)
5006 return res;
5007 }
5008
5009 return 0;
5010 }
5011
5012 static struct ibm_struct cmos_driver_data = {
5013 .name = "cmos",
5014 .read = cmos_read,
5015 .write = cmos_write,
5016 .exit = cmos_exit,
5017 };
5018
5019 /*************************************************************************
5020 * LED subdriver
5021 */
5022
5023 enum led_access_mode {
5024 TPACPI_LED_NONE = 0,
5025 TPACPI_LED_570, /* 570 */
5026 TPACPI_LED_OLD, /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
5027 TPACPI_LED_NEW, /* all others */
5028 };
5029
5030 enum { /* For TPACPI_LED_OLD */
5031 TPACPI_LED_EC_HLCL = 0x0c, /* EC reg to get led to power on */
5032 TPACPI_LED_EC_HLBL = 0x0d, /* EC reg to blink a lit led */
5033 TPACPI_LED_EC_HLMS = 0x0e, /* EC reg to select led to command */
5034 };
5035
5036 static enum led_access_mode led_supported;
5037
5038 static acpi_handle led_handle;
5039
5040 #define TPACPI_LED_NUMLEDS 16
5041 static struct tpacpi_led_classdev *tpacpi_leds;
5042 static enum led_status_t tpacpi_led_state_cache[TPACPI_LED_NUMLEDS];
5043 static const char * const tpacpi_led_names[TPACPI_LED_NUMLEDS] = {
5044 /* there's a limit of 19 chars + NULL before 2.6.26 */
5045 "tpacpi::power",
5046 "tpacpi:orange:batt",
5047 "tpacpi:green:batt",
5048 "tpacpi::dock_active",
5049 "tpacpi::bay_active",
5050 "tpacpi::dock_batt",
5051 "tpacpi::unknown_led",
5052 "tpacpi::standby",
5053 "tpacpi::dock_status1",
5054 "tpacpi::dock_status2",
5055 "tpacpi::unknown_led2",
5056 "tpacpi::unknown_led3",
5057 "tpacpi::thinkvantage",
5058 };
5059 #define TPACPI_SAFE_LEDS 0x1081U
5060
5061 static inline bool tpacpi_is_led_restricted(const unsigned int led)
5062 {
5063 #ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS
5064 return false;
5065 #else
5066 return (1U & (TPACPI_SAFE_LEDS >> led)) == 0;
5067 #endif
5068 }
5069
5070 static int led_get_status(const unsigned int led)
5071 {
5072 int status;
5073 enum led_status_t led_s;
5074
5075 switch (led_supported) {
5076 case TPACPI_LED_570:
5077 if (!acpi_evalf(ec_handle,
5078 &status, "GLED", "dd", 1 << led))
5079 return -EIO;
5080 led_s = (status == 0)?
5081 TPACPI_LED_OFF :
5082 ((status == 1)?
5083 TPACPI_LED_ON :
5084 TPACPI_LED_BLINK);
5085 tpacpi_led_state_cache[led] = led_s;
5086 return led_s;
5087 default:
5088 return -ENXIO;
5089 }
5090
5091 /* not reached */
5092 }
5093
5094 static int led_set_status(const unsigned int led,
5095 const enum led_status_t ledstatus)
5096 {
5097 /* off, on, blink. Index is led_status_t */
5098 static const unsigned int led_sled_arg1[] = { 0, 1, 3 };
5099 static const unsigned int led_led_arg1[] = { 0, 0x80, 0xc0 };
5100
5101 int rc = 0;
5102
5103 switch (led_supported) {
5104 case TPACPI_LED_570:
5105 /* 570 */
5106 if (unlikely(led > 7))
5107 return -EINVAL;
5108 if (unlikely(tpacpi_is_led_restricted(led)))
5109 return -EPERM;
5110 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
5111 (1 << led), led_sled_arg1[ledstatus]))
5112 rc = -EIO;
5113 break;
5114 case TPACPI_LED_OLD:
5115 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */
5116 if (unlikely(led > 7))
5117 return -EINVAL;
5118 if (unlikely(tpacpi_is_led_restricted(led)))
5119 return -EPERM;
5120 rc = ec_write(TPACPI_LED_EC_HLMS, (1 << led));
5121 if (rc >= 0)
5122 rc = ec_write(TPACPI_LED_EC_HLBL,
5123 (ledstatus == TPACPI_LED_BLINK) << led);
5124 if (rc >= 0)
5125 rc = ec_write(TPACPI_LED_EC_HLCL,
5126 (ledstatus != TPACPI_LED_OFF) << led);
5127 break;
5128 case TPACPI_LED_NEW:
5129 /* all others */
5130 if (unlikely(led >= TPACPI_LED_NUMLEDS))
5131 return -EINVAL;
5132 if (unlikely(tpacpi_is_led_restricted(led)))
5133 return -EPERM;
5134 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
5135 led, led_led_arg1[ledstatus]))
5136 rc = -EIO;
5137 break;
5138 default:
5139 rc = -ENXIO;
5140 }
5141
5142 if (!rc)
5143 tpacpi_led_state_cache[led] = ledstatus;
5144
5145 return rc;
5146 }
5147
5148 static void led_set_status_worker(struct work_struct *work)
5149 {
5150 struct tpacpi_led_classdev *data =
5151 container_of(work, struct tpacpi_led_classdev, work);
5152
5153 if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING))
5154 led_set_status(data->led, data->new_state);
5155 }
5156
5157 static void led_sysfs_set(struct led_classdev *led_cdev,
5158 enum led_brightness brightness)
5159 {
5160 struct tpacpi_led_classdev *data = container_of(led_cdev,
5161 struct tpacpi_led_classdev, led_classdev);
5162
5163 if (brightness == LED_OFF)
5164 data->new_state = TPACPI_LED_OFF;
5165 else if (tpacpi_led_state_cache[data->led] != TPACPI_LED_BLINK)
5166 data->new_state = TPACPI_LED_ON;
5167 else
5168 data->new_state = TPACPI_LED_BLINK;
5169
5170 queue_work(tpacpi_wq, &data->work);
5171 }
5172
5173 static int led_sysfs_blink_set(struct led_classdev *led_cdev,
5174 unsigned long *delay_on, unsigned long *delay_off)
5175 {
5176 struct tpacpi_led_classdev *data = container_of(led_cdev,
5177 struct tpacpi_led_classdev, led_classdev);
5178
5179 /* Can we choose the flash rate? */
5180 if (*delay_on == 0 && *delay_off == 0) {
5181 /* yes. set them to the hardware blink rate (1 Hz) */
5182 *delay_on = 500; /* ms */
5183 *delay_off = 500; /* ms */
5184 } else if ((*delay_on != 500) || (*delay_off != 500))
5185 return -EINVAL;
5186
5187 data->new_state = TPACPI_LED_BLINK;
5188 queue_work(tpacpi_wq, &data->work);
5189
5190 return 0;
5191 }
5192
5193 static enum led_brightness led_sysfs_get(struct led_classdev *led_cdev)
5194 {
5195 int rc;
5196
5197 struct tpacpi_led_classdev *data = container_of(led_cdev,
5198 struct tpacpi_led_classdev, led_classdev);
5199
5200 rc = led_get_status(data->led);
5201
5202 if (rc == TPACPI_LED_OFF || rc < 0)
5203 rc = LED_OFF; /* no error handling in led class :( */
5204 else
5205 rc = LED_FULL;
5206
5207 return rc;
5208 }
5209
5210 static void led_exit(void)
5211 {
5212 unsigned int i;
5213
5214 for (i = 0; i < TPACPI_LED_NUMLEDS; i++) {
5215 if (tpacpi_leds[i].led_classdev.name)
5216 led_classdev_unregister(&tpacpi_leds[i].led_classdev);
5217 }
5218
5219 kfree(tpacpi_leds);
5220 }
5221
5222 static int __init tpacpi_init_led(unsigned int led)
5223 {
5224 int rc;
5225
5226 tpacpi_leds[led].led = led;
5227
5228 /* LEDs with no name don't get registered */
5229 if (!tpacpi_led_names[led])
5230 return 0;
5231
5232 tpacpi_leds[led].led_classdev.brightness_set = &led_sysfs_set;
5233 tpacpi_leds[led].led_classdev.blink_set = &led_sysfs_blink_set;
5234 if (led_supported == TPACPI_LED_570)
5235 tpacpi_leds[led].led_classdev.brightness_get =
5236 &led_sysfs_get;
5237
5238 tpacpi_leds[led].led_classdev.name = tpacpi_led_names[led];
5239
5240 INIT_WORK(&tpacpi_leds[led].work, led_set_status_worker);
5241
5242 rc = led_classdev_register(&tpacpi_pdev->dev,
5243 &tpacpi_leds[led].led_classdev);
5244 if (rc < 0)
5245 tpacpi_leds[led].led_classdev.name = NULL;
5246
5247 return rc;
5248 }
5249
5250 static const struct tpacpi_quirk led_useful_qtable[] __initconst = {
5251 TPACPI_Q_IBM('1', 'E', 0x009f), /* A30 */
5252 TPACPI_Q_IBM('1', 'N', 0x009f), /* A31 */
5253 TPACPI_Q_IBM('1', 'G', 0x009f), /* A31 */
5254
5255 TPACPI_Q_IBM('1', 'I', 0x0097), /* T30 */
5256 TPACPI_Q_IBM('1', 'R', 0x0097), /* T40, T41, T42, R50, R51 */
5257 TPACPI_Q_IBM('7', '0', 0x0097), /* T43, R52 */
5258 TPACPI_Q_IBM('1', 'Y', 0x0097), /* T43 */
5259 TPACPI_Q_IBM('1', 'W', 0x0097), /* R50e */
5260 TPACPI_Q_IBM('1', 'V', 0x0097), /* R51 */
5261 TPACPI_Q_IBM('7', '8', 0x0097), /* R51e */
5262 TPACPI_Q_IBM('7', '6', 0x0097), /* R52 */
5263
5264 TPACPI_Q_IBM('1', 'K', 0x00bf), /* X30 */
5265 TPACPI_Q_IBM('1', 'Q', 0x00bf), /* X31, X32 */
5266 TPACPI_Q_IBM('1', 'U', 0x00bf), /* X40 */
5267 TPACPI_Q_IBM('7', '4', 0x00bf), /* X41 */
5268 TPACPI_Q_IBM('7', '5', 0x00bf), /* X41t */
5269
5270 TPACPI_Q_IBM('7', '9', 0x1f97), /* T60 (1) */
5271 TPACPI_Q_IBM('7', '7', 0x1f97), /* Z60* (1) */
5272 TPACPI_Q_IBM('7', 'F', 0x1f97), /* Z61* (1) */
5273 TPACPI_Q_IBM('7', 'B', 0x1fb7), /* X60 (1) */
5274
5275 /* (1) - may have excess leds enabled on MSB */
5276
5277 /* Defaults (order matters, keep last, don't reorder!) */
5278 { /* Lenovo */
5279 .vendor = PCI_VENDOR_ID_LENOVO,
5280 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY,
5281 .quirks = 0x1fffU,
5282 },
5283 { /* IBM ThinkPads with no EC version string */
5284 .vendor = PCI_VENDOR_ID_IBM,
5285 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_UNKNOWN,
5286 .quirks = 0x00ffU,
5287 },
5288 { /* IBM ThinkPads with EC version string */
5289 .vendor = PCI_VENDOR_ID_IBM,
5290 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY,
5291 .quirks = 0x00bfU,
5292 },
5293 };
5294
5295 #undef TPACPI_LEDQ_IBM
5296 #undef TPACPI_LEDQ_LNV
5297
5298 static enum led_access_mode __init led_init_detect_mode(void)
5299 {
5300 acpi_status status;
5301
5302 if (tpacpi_is_ibm()) {
5303 /* 570 */
5304 status = acpi_get_handle(ec_handle, "SLED", &led_handle);
5305 if (ACPI_SUCCESS(status))
5306 return TPACPI_LED_570;
5307
5308 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
5309 status = acpi_get_handle(ec_handle, "SYSL", &led_handle);
5310 if (ACPI_SUCCESS(status))
5311 return TPACPI_LED_OLD;
5312 }
5313
5314 /* most others */
5315 status = acpi_get_handle(ec_handle, "LED", &led_handle);
5316 if (ACPI_SUCCESS(status))
5317 return TPACPI_LED_NEW;
5318
5319 /* R30, R31, and unknown firmwares */
5320 led_handle = NULL;
5321 return TPACPI_LED_NONE;
5322 }
5323
5324 static int __init led_init(struct ibm_init_struct *iibm)
5325 {
5326 unsigned int i;
5327 int rc;
5328 unsigned long useful_leds;
5329
5330 vdbg_printk(TPACPI_DBG_INIT, "initializing LED subdriver\n");
5331
5332 led_supported = led_init_detect_mode();
5333
5334 vdbg_printk(TPACPI_DBG_INIT, "LED commands are %s, mode %d\n",
5335 str_supported(led_supported), led_supported);
5336
5337 if (led_supported == TPACPI_LED_NONE)
5338 return 1;
5339
5340 tpacpi_leds = kzalloc(sizeof(*tpacpi_leds) * TPACPI_LED_NUMLEDS,
5341 GFP_KERNEL);
5342 if (!tpacpi_leds) {
5343 pr_err("Out of memory for LED data\n");
5344 return -ENOMEM;
5345 }
5346
5347 useful_leds = tpacpi_check_quirks(led_useful_qtable,
5348 ARRAY_SIZE(led_useful_qtable));
5349
5350 for (i = 0; i < TPACPI_LED_NUMLEDS; i++) {
5351 if (!tpacpi_is_led_restricted(i) &&
5352 test_bit(i, &useful_leds)) {
5353 rc = tpacpi_init_led(i);
5354 if (rc < 0) {
5355 led_exit();
5356 return rc;
5357 }
5358 }
5359 }
5360
5361 #ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS
5362 pr_notice("warning: userspace override of important "
5363 "firmware LEDs is enabled\n");
5364 #endif
5365 return 0;
5366 }
5367
5368 #define str_led_status(s) \
5369 ((s) == TPACPI_LED_OFF ? "off" : \
5370 ((s) == TPACPI_LED_ON ? "on" : "blinking"))
5371
5372 static int led_read(struct seq_file *m)
5373 {
5374 if (!led_supported) {
5375 seq_printf(m, "status:\t\tnot supported\n");
5376 return 0;
5377 }
5378 seq_printf(m, "status:\t\tsupported\n");
5379
5380 if (led_supported == TPACPI_LED_570) {
5381 /* 570 */
5382 int i, status;
5383 for (i = 0; i < 8; i++) {
5384 status = led_get_status(i);
5385 if (status < 0)
5386 return -EIO;
5387 seq_printf(m, "%d:\t\t%s\n",
5388 i, str_led_status(status));
5389 }
5390 }
5391
5392 seq_printf(m, "commands:\t"
5393 "<led> on, <led> off, <led> blink (<led> is 0-15)\n");
5394
5395 return 0;
5396 }
5397
5398 static int led_write(char *buf)
5399 {
5400 char *cmd;
5401 int led, rc;
5402 enum led_status_t s;
5403
5404 if (!led_supported)
5405 return -ENODEV;
5406
5407 while ((cmd = next_cmd(&buf))) {
5408 if (sscanf(cmd, "%d", &led) != 1 || led < 0 || led > 15)
5409 return -EINVAL;
5410
5411 if (strstr(cmd, "off")) {
5412 s = TPACPI_LED_OFF;
5413 } else if (strstr(cmd, "on")) {
5414 s = TPACPI_LED_ON;
5415 } else if (strstr(cmd, "blink")) {
5416 s = TPACPI_LED_BLINK;
5417 } else {
5418 return -EINVAL;
5419 }
5420
5421 rc = led_set_status(led, s);
5422 if (rc < 0)
5423 return rc;
5424 }
5425
5426 return 0;
5427 }
5428
5429 static struct ibm_struct led_driver_data = {
5430 .name = "led",
5431 .read = led_read,
5432 .write = led_write,
5433 .exit = led_exit,
5434 };
5435
5436 /*************************************************************************
5437 * Beep subdriver
5438 */
5439
5440 TPACPI_HANDLE(beep, ec, "BEEP"); /* all except R30, R31 */
5441
5442 #define TPACPI_BEEP_Q1 0x0001
5443
5444 static const struct tpacpi_quirk beep_quirk_table[] __initconst = {
5445 TPACPI_Q_IBM('I', 'M', TPACPI_BEEP_Q1), /* 570 */
5446 TPACPI_Q_IBM('I', 'U', TPACPI_BEEP_Q1), /* 570E - unverified */
5447 };
5448
5449 static int __init beep_init(struct ibm_init_struct *iibm)
5450 {
5451 unsigned long quirks;
5452
5453 vdbg_printk(TPACPI_DBG_INIT, "initializing beep subdriver\n");
5454
5455 TPACPI_ACPIHANDLE_INIT(beep);
5456
5457 vdbg_printk(TPACPI_DBG_INIT, "beep is %s\n",
5458 str_supported(beep_handle != NULL));
5459
5460 quirks = tpacpi_check_quirks(beep_quirk_table,
5461 ARRAY_SIZE(beep_quirk_table));
5462
5463 tp_features.beep_needs_two_args = !!(quirks & TPACPI_BEEP_Q1);
5464
5465 return (beep_handle)? 0 : 1;
5466 }
5467
5468 static int beep_read(struct seq_file *m)
5469 {
5470 if (!beep_handle)
5471 seq_printf(m, "status:\t\tnot supported\n");
5472 else {
5473 seq_printf(m, "status:\t\tsupported\n");
5474 seq_printf(m, "commands:\t<cmd> (<cmd> is 0-17)\n");
5475 }
5476
5477 return 0;
5478 }
5479
5480 static int beep_write(char *buf)
5481 {
5482 char *cmd;
5483 int beep_cmd;
5484
5485 if (!beep_handle)
5486 return -ENODEV;
5487
5488 while ((cmd = next_cmd(&buf))) {
5489 if (sscanf(cmd, "%u", &beep_cmd) == 1 &&
5490 beep_cmd >= 0 && beep_cmd <= 17) {
5491 /* beep_cmd set */
5492 } else
5493 return -EINVAL;
5494 if (tp_features.beep_needs_two_args) {
5495 if (!acpi_evalf(beep_handle, NULL, NULL, "vdd",
5496 beep_cmd, 0))
5497 return -EIO;
5498 } else {
5499 if (!acpi_evalf(beep_handle, NULL, NULL, "vd",
5500 beep_cmd))
5501 return -EIO;
5502 }
5503 }
5504
5505 return 0;
5506 }
5507
5508 static struct ibm_struct beep_driver_data = {
5509 .name = "beep",
5510 .read = beep_read,
5511 .write = beep_write,
5512 };
5513
5514 /*************************************************************************
5515 * Thermal subdriver
5516 */
5517
5518 enum thermal_access_mode {
5519 TPACPI_THERMAL_NONE = 0, /* No thermal support */
5520 TPACPI_THERMAL_ACPI_TMP07, /* Use ACPI TMP0-7 */
5521 TPACPI_THERMAL_ACPI_UPDT, /* Use ACPI TMP0-7 with UPDT */
5522 TPACPI_THERMAL_TPEC_8, /* Use ACPI EC regs, 8 sensors */
5523 TPACPI_THERMAL_TPEC_16, /* Use ACPI EC regs, 16 sensors */
5524 };
5525
5526 enum { /* TPACPI_THERMAL_TPEC_* */
5527 TP_EC_THERMAL_TMP0 = 0x78, /* ACPI EC regs TMP 0..7 */
5528 TP_EC_THERMAL_TMP8 = 0xC0, /* ACPI EC regs TMP 8..15 */
5529 TP_EC_THERMAL_TMP_NA = -128, /* ACPI EC sensor not available */
5530
5531 TPACPI_THERMAL_SENSOR_NA = -128000, /* Sensor not available */
5532 };
5533
5534
5535 #define TPACPI_MAX_THERMAL_SENSORS 16 /* Max thermal sensors supported */
5536 struct ibm_thermal_sensors_struct {
5537 s32 temp[TPACPI_MAX_THERMAL_SENSORS];
5538 };
5539
5540 static enum thermal_access_mode thermal_read_mode;
5541
5542 /* idx is zero-based */
5543 static int thermal_get_sensor(int idx, s32 *value)
5544 {
5545 int t;
5546 s8 tmp;
5547 char tmpi[5];
5548
5549 t = TP_EC_THERMAL_TMP0;
5550
5551 switch (thermal_read_mode) {
5552 #if TPACPI_MAX_THERMAL_SENSORS >= 16
5553 case TPACPI_THERMAL_TPEC_16:
5554 if (idx >= 8 && idx <= 15) {
5555 t = TP_EC_THERMAL_TMP8;
5556 idx -= 8;
5557 }
5558 /* fallthrough */
5559 #endif
5560 case TPACPI_THERMAL_TPEC_8:
5561 if (idx <= 7) {
5562 if (!acpi_ec_read(t + idx, &tmp))
5563 return -EIO;
5564 *value = tmp * 1000;
5565 return 0;
5566 }
5567 break;
5568
5569 case TPACPI_THERMAL_ACPI_UPDT:
5570 if (idx <= 7) {
5571 snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
5572 if (!acpi_evalf(ec_handle, NULL, "UPDT", "v"))
5573 return -EIO;
5574 if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
5575 return -EIO;
5576 *value = (t - 2732) * 100;
5577 return 0;
5578 }
5579 break;
5580
5581 case TPACPI_THERMAL_ACPI_TMP07:
5582 if (idx <= 7) {
5583 snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
5584 if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
5585 return -EIO;
5586 if (t > 127 || t < -127)
5587 t = TP_EC_THERMAL_TMP_NA;
5588 *value = t * 1000;
5589 return 0;
5590 }
5591 break;
5592
5593 case TPACPI_THERMAL_NONE:
5594 default:
5595 return -ENOSYS;
5596 }
5597
5598 return -EINVAL;
5599 }
5600
5601 static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s)
5602 {
5603 int res, i;
5604 int n;
5605
5606 n = 8;
5607 i = 0;
5608
5609 if (!s)
5610 return -EINVAL;
5611
5612 if (thermal_read_mode == TPACPI_THERMAL_TPEC_16)
5613 n = 16;
5614
5615 for (i = 0 ; i < n; i++) {
5616 res = thermal_get_sensor(i, &s->temp[i]);
5617 if (res)
5618 return res;
5619 }
5620
5621 return n;
5622 }
5623
5624 static void thermal_dump_all_sensors(void)
5625 {
5626 int n, i;
5627 struct ibm_thermal_sensors_struct t;
5628
5629 n = thermal_get_sensors(&t);
5630 if (n <= 0)
5631 return;
5632
5633 pr_notice("temperatures (Celsius):");
5634
5635 for (i = 0; i < n; i++) {
5636 if (t.temp[i] != TPACPI_THERMAL_SENSOR_NA)
5637 pr_cont(" %d", (int)(t.temp[i] / 1000));
5638 else
5639 pr_cont(" N/A");
5640 }
5641
5642 pr_cont("\n");
5643 }
5644
5645 /* sysfs temp##_input -------------------------------------------------- */
5646
5647 static ssize_t thermal_temp_input_show(struct device *dev,
5648 struct device_attribute *attr,
5649 char *buf)
5650 {
5651 struct sensor_device_attribute *sensor_attr =
5652 to_sensor_dev_attr(attr);
5653 int idx = sensor_attr->index;
5654 s32 value;
5655 int res;
5656
5657 res = thermal_get_sensor(idx, &value);
5658 if (res)
5659 return res;
5660 if (value == TPACPI_THERMAL_SENSOR_NA)
5661 return -ENXIO;
5662
5663 return snprintf(buf, PAGE_SIZE, "%d\n", value);
5664 }
5665
5666 #define THERMAL_SENSOR_ATTR_TEMP(_idxA, _idxB) \
5667 SENSOR_ATTR(temp##_idxA##_input, S_IRUGO, \
5668 thermal_temp_input_show, NULL, _idxB)
5669
5670 static struct sensor_device_attribute sensor_dev_attr_thermal_temp_input[] = {
5671 THERMAL_SENSOR_ATTR_TEMP(1, 0),
5672 THERMAL_SENSOR_ATTR_TEMP(2, 1),
5673 THERMAL_SENSOR_ATTR_TEMP(3, 2),
5674 THERMAL_SENSOR_ATTR_TEMP(4, 3),
5675 THERMAL_SENSOR_ATTR_TEMP(5, 4),
5676 THERMAL_SENSOR_ATTR_TEMP(6, 5),
5677 THERMAL_SENSOR_ATTR_TEMP(7, 6),
5678 THERMAL_SENSOR_ATTR_TEMP(8, 7),
5679 THERMAL_SENSOR_ATTR_TEMP(9, 8),
5680 THERMAL_SENSOR_ATTR_TEMP(10, 9),
5681 THERMAL_SENSOR_ATTR_TEMP(11, 10),
5682 THERMAL_SENSOR_ATTR_TEMP(12, 11),
5683 THERMAL_SENSOR_ATTR_TEMP(13, 12),
5684 THERMAL_SENSOR_ATTR_TEMP(14, 13),
5685 THERMAL_SENSOR_ATTR_TEMP(15, 14),
5686 THERMAL_SENSOR_ATTR_TEMP(16, 15),
5687 };
5688
5689 #define THERMAL_ATTRS(X) \
5690 &sensor_dev_attr_thermal_temp_input[X].dev_attr.attr
5691
5692 static struct attribute *thermal_temp_input_attr[] = {
5693 THERMAL_ATTRS(8),
5694 THERMAL_ATTRS(9),
5695 THERMAL_ATTRS(10),
5696 THERMAL_ATTRS(11),
5697 THERMAL_ATTRS(12),
5698 THERMAL_ATTRS(13),
5699 THERMAL_ATTRS(14),
5700 THERMAL_ATTRS(15),
5701 THERMAL_ATTRS(0),
5702 THERMAL_ATTRS(1),
5703 THERMAL_ATTRS(2),
5704 THERMAL_ATTRS(3),
5705 THERMAL_ATTRS(4),
5706 THERMAL_ATTRS(5),
5707 THERMAL_ATTRS(6),
5708 THERMAL_ATTRS(7),
5709 NULL
5710 };
5711
5712 static const struct attribute_group thermal_temp_input16_group = {
5713 .attrs = thermal_temp_input_attr
5714 };
5715
5716 static const struct attribute_group thermal_temp_input8_group = {
5717 .attrs = &thermal_temp_input_attr[8]
5718 };
5719
5720 #undef THERMAL_SENSOR_ATTR_TEMP
5721 #undef THERMAL_ATTRS
5722
5723 /* --------------------------------------------------------------------- */
5724
5725 static int __init thermal_init(struct ibm_init_struct *iibm)
5726 {
5727 u8 t, ta1, ta2;
5728 int i;
5729 int acpi_tmp7;
5730 int res;
5731
5732 vdbg_printk(TPACPI_DBG_INIT, "initializing thermal subdriver\n");
5733
5734 acpi_tmp7 = acpi_evalf(ec_handle, NULL, "TMP7", "qv");
5735
5736 if (thinkpad_id.ec_model) {
5737 /*
5738 * Direct EC access mode: sensors at registers
5739 * 0x78-0x7F, 0xC0-0xC7. Registers return 0x00 for
5740 * non-implemented, thermal sensors return 0x80 when
5741 * not available
5742 */
5743
5744 ta1 = ta2 = 0;
5745 for (i = 0; i < 8; i++) {
5746 if (acpi_ec_read(TP_EC_THERMAL_TMP0 + i, &t)) {
5747 ta1 |= t;
5748 } else {
5749 ta1 = 0;
5750 break;
5751 }
5752 if (acpi_ec_read(TP_EC_THERMAL_TMP8 + i, &t)) {
5753 ta2 |= t;
5754 } else {
5755 ta1 = 0;
5756 break;
5757 }
5758 }
5759 if (ta1 == 0) {
5760 /* This is sheer paranoia, but we handle it anyway */
5761 if (acpi_tmp7) {
5762 pr_err("ThinkPad ACPI EC access misbehaving, "
5763 "falling back to ACPI TMPx access "
5764 "mode\n");
5765 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
5766 } else {
5767 pr_err("ThinkPad ACPI EC access misbehaving, "
5768 "disabling thermal sensors access\n");
5769 thermal_read_mode = TPACPI_THERMAL_NONE;
5770 }
5771 } else {
5772 thermal_read_mode =
5773 (ta2 != 0) ?
5774 TPACPI_THERMAL_TPEC_16 : TPACPI_THERMAL_TPEC_8;
5775 }
5776 } else if (acpi_tmp7) {
5777 if (tpacpi_is_ibm() &&
5778 acpi_evalf(ec_handle, NULL, "UPDT", "qv")) {
5779 /* 600e/x, 770e, 770x */
5780 thermal_read_mode = TPACPI_THERMAL_ACPI_UPDT;
5781 } else {
5782 /* IBM/LENOVO DSDT EC.TMPx access, max 8 sensors */
5783 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
5784 }
5785 } else {
5786 /* temperatures not supported on 570, G4x, R30, R31, R32 */
5787 thermal_read_mode = TPACPI_THERMAL_NONE;
5788 }
5789
5790 vdbg_printk(TPACPI_DBG_INIT, "thermal is %s, mode %d\n",
5791 str_supported(thermal_read_mode != TPACPI_THERMAL_NONE),
5792 thermal_read_mode);
5793
5794 switch (thermal_read_mode) {
5795 case TPACPI_THERMAL_TPEC_16:
5796 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
5797 &thermal_temp_input16_group);
5798 if (res)
5799 return res;
5800 break;
5801 case TPACPI_THERMAL_TPEC_8:
5802 case TPACPI_THERMAL_ACPI_TMP07:
5803 case TPACPI_THERMAL_ACPI_UPDT:
5804 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
5805 &thermal_temp_input8_group);
5806 if (res)
5807 return res;
5808 break;
5809 case TPACPI_THERMAL_NONE:
5810 default:
5811 return 1;
5812 }
5813
5814 return 0;
5815 }
5816
5817 static void thermal_exit(void)
5818 {
5819 switch (thermal_read_mode) {
5820 case TPACPI_THERMAL_TPEC_16:
5821 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
5822 &thermal_temp_input16_group);
5823 break;
5824 case TPACPI_THERMAL_TPEC_8:
5825 case TPACPI_THERMAL_ACPI_TMP07:
5826 case TPACPI_THERMAL_ACPI_UPDT:
5827 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
5828 &thermal_temp_input8_group);
5829 break;
5830 case TPACPI_THERMAL_NONE:
5831 default:
5832 break;
5833 }
5834 }
5835
5836 static int thermal_read(struct seq_file *m)
5837 {
5838 int n, i;
5839 struct ibm_thermal_sensors_struct t;
5840
5841 n = thermal_get_sensors(&t);
5842 if (unlikely(n < 0))
5843 return n;
5844
5845 seq_printf(m, "temperatures:\t");
5846
5847 if (n > 0) {
5848 for (i = 0; i < (n - 1); i++)
5849 seq_printf(m, "%d ", t.temp[i] / 1000);
5850 seq_printf(m, "%d\n", t.temp[i] / 1000);
5851 } else
5852 seq_printf(m, "not supported\n");
5853
5854 return 0;
5855 }
5856
5857 static struct ibm_struct thermal_driver_data = {
5858 .name = "thermal",
5859 .read = thermal_read,
5860 .exit = thermal_exit,
5861 };
5862
5863 /*************************************************************************
5864 * Backlight/brightness subdriver
5865 */
5866
5867 #define TPACPI_BACKLIGHT_DEV_NAME "thinkpad_screen"
5868
5869 /*
5870 * ThinkPads can read brightness from two places: EC HBRV (0x31), or
5871 * CMOS NVRAM byte 0x5E, bits 0-3.
5872 *
5873 * EC HBRV (0x31) has the following layout
5874 * Bit 7: unknown function
5875 * Bit 6: unknown function
5876 * Bit 5: Z: honour scale changes, NZ: ignore scale changes
5877 * Bit 4: must be set to zero to avoid problems
5878 * Bit 3-0: backlight brightness level
5879 *
5880 * brightness_get_raw returns status data in the HBRV layout
5881 *
5882 * WARNING: The X61 has been verified to use HBRV for something else, so
5883 * this should be used _only_ on IBM ThinkPads, and maybe with some careful
5884 * testing on the very early *60 Lenovo models...
5885 */
5886
5887 enum {
5888 TP_EC_BACKLIGHT = 0x31,
5889
5890 /* TP_EC_BACKLIGHT bitmasks */
5891 TP_EC_BACKLIGHT_LVLMSK = 0x1F,
5892 TP_EC_BACKLIGHT_CMDMSK = 0xE0,
5893 TP_EC_BACKLIGHT_MAPSW = 0x20,
5894 };
5895
5896 enum tpacpi_brightness_access_mode {
5897 TPACPI_BRGHT_MODE_AUTO = 0, /* Not implemented yet */
5898 TPACPI_BRGHT_MODE_EC, /* EC control */
5899 TPACPI_BRGHT_MODE_UCMS_STEP, /* UCMS step-based control */
5900 TPACPI_BRGHT_MODE_ECNVRAM, /* EC control w/ NVRAM store */
5901 TPACPI_BRGHT_MODE_MAX
5902 };
5903
5904 static struct backlight_device *ibm_backlight_device;
5905
5906 static enum tpacpi_brightness_access_mode brightness_mode =
5907 TPACPI_BRGHT_MODE_MAX;
5908
5909 static unsigned int brightness_enable = 2; /* 2 = auto, 0 = no, 1 = yes */
5910
5911 static struct mutex brightness_mutex;
5912
5913 /* NVRAM brightness access,
5914 * call with brightness_mutex held! */
5915 static unsigned int tpacpi_brightness_nvram_get(void)
5916 {
5917 u8 lnvram;
5918
5919 lnvram = (nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS)
5920 & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
5921 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
5922 lnvram &= bright_maxlvl;
5923
5924 return lnvram;
5925 }
5926
5927 static void tpacpi_brightness_checkpoint_nvram(void)
5928 {
5929 u8 lec = 0;
5930 u8 b_nvram;
5931
5932 if (brightness_mode != TPACPI_BRGHT_MODE_ECNVRAM)
5933 return;
5934
5935 vdbg_printk(TPACPI_DBG_BRGHT,
5936 "trying to checkpoint backlight level to NVRAM...\n");
5937
5938 if (mutex_lock_killable(&brightness_mutex) < 0)
5939 return;
5940
5941 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
5942 goto unlock;
5943 lec &= TP_EC_BACKLIGHT_LVLMSK;
5944 b_nvram = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS);
5945
5946 if (lec != ((b_nvram & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
5947 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS)) {
5948 /* NVRAM needs update */
5949 b_nvram &= ~(TP_NVRAM_MASK_LEVEL_BRIGHTNESS <<
5950 TP_NVRAM_POS_LEVEL_BRIGHTNESS);
5951 b_nvram |= lec;
5952 nvram_write_byte(b_nvram, TP_NVRAM_ADDR_BRIGHTNESS);
5953 dbg_printk(TPACPI_DBG_BRGHT,
5954 "updated NVRAM backlight level to %u (0x%02x)\n",
5955 (unsigned int) lec, (unsigned int) b_nvram);
5956 } else
5957 vdbg_printk(TPACPI_DBG_BRGHT,
5958 "NVRAM backlight level already is %u (0x%02x)\n",
5959 (unsigned int) lec, (unsigned int) b_nvram);
5960
5961 unlock:
5962 mutex_unlock(&brightness_mutex);
5963 }
5964
5965
5966 /* call with brightness_mutex held! */
5967 static int tpacpi_brightness_get_raw(int *status)
5968 {
5969 u8 lec = 0;
5970
5971 switch (brightness_mode) {
5972 case TPACPI_BRGHT_MODE_UCMS_STEP:
5973 *status = tpacpi_brightness_nvram_get();
5974 return 0;
5975 case TPACPI_BRGHT_MODE_EC:
5976 case TPACPI_BRGHT_MODE_ECNVRAM:
5977 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
5978 return -EIO;
5979 *status = lec;
5980 return 0;
5981 default:
5982 return -ENXIO;
5983 }
5984 }
5985
5986 /* call with brightness_mutex held! */
5987 /* do NOT call with illegal backlight level value */
5988 static int tpacpi_brightness_set_ec(unsigned int value)
5989 {
5990 u8 lec = 0;
5991
5992 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
5993 return -EIO;
5994
5995 if (unlikely(!acpi_ec_write(TP_EC_BACKLIGHT,
5996 (lec & TP_EC_BACKLIGHT_CMDMSK) |
5997 (value & TP_EC_BACKLIGHT_LVLMSK))))
5998 return -EIO;
5999
6000 return 0;
6001 }
6002
6003 /* call with brightness_mutex held! */
6004 static int tpacpi_brightness_set_ucmsstep(unsigned int value)
6005 {
6006 int cmos_cmd, inc;
6007 unsigned int current_value, i;
6008
6009 current_value = tpacpi_brightness_nvram_get();
6010
6011 if (value == current_value)
6012 return 0;
6013
6014 cmos_cmd = (value > current_value) ?
6015 TP_CMOS_BRIGHTNESS_UP :
6016 TP_CMOS_BRIGHTNESS_DOWN;
6017 inc = (value > current_value) ? 1 : -1;
6018
6019 for (i = current_value; i != value; i += inc)
6020 if (issue_thinkpad_cmos_command(cmos_cmd))
6021 return -EIO;
6022
6023 return 0;
6024 }
6025
6026 /* May return EINTR which can always be mapped to ERESTARTSYS */
6027 static int brightness_set(unsigned int value)
6028 {
6029 int res;
6030
6031 if (value > bright_maxlvl || value < 0)
6032 return -EINVAL;
6033
6034 vdbg_printk(TPACPI_DBG_BRGHT,
6035 "set backlight level to %d\n", value);
6036
6037 res = mutex_lock_killable(&brightness_mutex);
6038 if (res < 0)
6039 return res;
6040
6041 switch (brightness_mode) {
6042 case TPACPI_BRGHT_MODE_EC:
6043 case TPACPI_BRGHT_MODE_ECNVRAM:
6044 res = tpacpi_brightness_set_ec(value);
6045 break;
6046 case TPACPI_BRGHT_MODE_UCMS_STEP:
6047 res = tpacpi_brightness_set_ucmsstep(value);
6048 break;
6049 default:
6050 res = -ENXIO;
6051 }
6052
6053 mutex_unlock(&brightness_mutex);
6054 return res;
6055 }
6056
6057 /* sysfs backlight class ----------------------------------------------- */
6058
6059 static int brightness_update_status(struct backlight_device *bd)
6060 {
6061 unsigned int level =
6062 (bd->props.fb_blank == FB_BLANK_UNBLANK &&
6063 bd->props.power == FB_BLANK_UNBLANK) ?
6064 bd->props.brightness : 0;
6065
6066 dbg_printk(TPACPI_DBG_BRGHT,
6067 "backlight: attempt to set level to %d\n",
6068 level);
6069
6070 /* it is the backlight class's job (caller) to handle
6071 * EINTR and other errors properly */
6072 return brightness_set(level);
6073 }
6074
6075 static int brightness_get(struct backlight_device *bd)
6076 {
6077 int status, res;
6078
6079 res = mutex_lock_killable(&brightness_mutex);
6080 if (res < 0)
6081 return 0;
6082
6083 res = tpacpi_brightness_get_raw(&status);
6084
6085 mutex_unlock(&brightness_mutex);
6086
6087 if (res < 0)
6088 return 0;
6089
6090 return status & TP_EC_BACKLIGHT_LVLMSK;
6091 }
6092
6093 static void tpacpi_brightness_notify_change(void)
6094 {
6095 backlight_force_update(ibm_backlight_device,
6096 BACKLIGHT_UPDATE_HOTKEY);
6097 }
6098
6099 static const struct backlight_ops ibm_backlight_data = {
6100 .get_brightness = brightness_get,
6101 .update_status = brightness_update_status,
6102 };
6103
6104 /* --------------------------------------------------------------------- */
6105
6106 /*
6107 * Call _BCL method of video device. On some ThinkPads this will
6108 * switch the firmware to the ACPI brightness control mode.
6109 */
6110
6111 static int __init tpacpi_query_bcl_levels(acpi_handle handle)
6112 {
6113 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
6114 union acpi_object *obj;
6115 int rc;
6116
6117 if (ACPI_SUCCESS(acpi_evaluate_object(handle, "_BCL", NULL, &buffer))) {
6118 obj = (union acpi_object *)buffer.pointer;
6119 if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) {
6120 pr_err("Unknown _BCL data, please report this to %s\n",
6121 TPACPI_MAIL);
6122 rc = 0;
6123 } else {
6124 rc = obj->package.count;
6125 }
6126 } else {
6127 return 0;
6128 }
6129
6130 kfree(buffer.pointer);
6131 return rc;
6132 }
6133
6134
6135 /*
6136 * Returns 0 (no ACPI _BCL or _BCL invalid), or size of brightness map
6137 */
6138 static unsigned int __init tpacpi_check_std_acpi_brightness_support(void)
6139 {
6140 acpi_handle video_device;
6141 int bcl_levels = 0;
6142
6143 tpacpi_acpi_handle_locate("video", ACPI_VIDEO_HID, &video_device);
6144 if (video_device)
6145 bcl_levels = tpacpi_query_bcl_levels(video_device);
6146
6147 tp_features.bright_acpimode = (bcl_levels > 0);
6148
6149 return (bcl_levels > 2) ? (bcl_levels - 2) : 0;
6150 }
6151
6152 /*
6153 * These are only useful for models that have only one possibility
6154 * of GPU. If the BIOS model handles both ATI and Intel, don't use
6155 * these quirks.
6156 */
6157 #define TPACPI_BRGHT_Q_NOEC 0x0001 /* Must NOT use EC HBRV */
6158 #define TPACPI_BRGHT_Q_EC 0x0002 /* Should or must use EC HBRV */
6159 #define TPACPI_BRGHT_Q_ASK 0x8000 /* Ask for user report */
6160
6161 static const struct tpacpi_quirk brightness_quirk_table[] __initconst = {
6162 /* Models with ATI GPUs known to require ECNVRAM mode */
6163 TPACPI_Q_IBM('1', 'Y', TPACPI_BRGHT_Q_EC), /* T43/p ATI */
6164
6165 /* Models with ATI GPUs that can use ECNVRAM */
6166 TPACPI_Q_IBM('1', 'R', TPACPI_BRGHT_Q_EC), /* R50,51 T40-42 */
6167 TPACPI_Q_IBM('1', 'Q', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
6168 TPACPI_Q_IBM('7', '6', TPACPI_BRGHT_Q_EC), /* R52 */
6169 TPACPI_Q_IBM('7', '8', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
6170
6171 /* Models with Intel Extreme Graphics 2 */
6172 TPACPI_Q_IBM('1', 'U', TPACPI_BRGHT_Q_NOEC), /* X40 */
6173 TPACPI_Q_IBM('1', 'V', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
6174 TPACPI_Q_IBM('1', 'W', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
6175
6176 /* Models with Intel GMA900 */
6177 TPACPI_Q_IBM('7', '0', TPACPI_BRGHT_Q_NOEC), /* T43, R52 */
6178 TPACPI_Q_IBM('7', '4', TPACPI_BRGHT_Q_NOEC), /* X41 */
6179 TPACPI_Q_IBM('7', '5', TPACPI_BRGHT_Q_NOEC), /* X41 Tablet */
6180 };
6181
6182 /*
6183 * Returns < 0 for error, otherwise sets tp_features.bright_*
6184 * and bright_maxlvl.
6185 */
6186 static void __init tpacpi_detect_brightness_capabilities(void)
6187 {
6188 unsigned int b;
6189
6190 vdbg_printk(TPACPI_DBG_INIT,
6191 "detecting firmware brightness interface capabilities\n");
6192
6193 /* we could run a quirks check here (same table used by
6194 * brightness_init) if needed */
6195
6196 /*
6197 * We always attempt to detect acpi support, so as to switch
6198 * Lenovo Vista BIOS to ACPI brightness mode even if we are not
6199 * going to publish a backlight interface
6200 */
6201 b = tpacpi_check_std_acpi_brightness_support();
6202 switch (b) {
6203 case 16:
6204 bright_maxlvl = 15;
6205 pr_info("detected a 16-level brightness capable ThinkPad\n");
6206 break;
6207 case 8:
6208 case 0:
6209 bright_maxlvl = 7;
6210 pr_info("detected a 8-level brightness capable ThinkPad\n");
6211 break;
6212 default:
6213 pr_err("Unsupported brightness interface, "
6214 "please contact %s\n", TPACPI_MAIL);
6215 tp_features.bright_unkfw = 1;
6216 bright_maxlvl = b - 1;
6217 }
6218 }
6219
6220 static int __init brightness_init(struct ibm_init_struct *iibm)
6221 {
6222 struct backlight_properties props;
6223 int b;
6224 unsigned long quirks;
6225
6226 vdbg_printk(TPACPI_DBG_INIT, "initializing brightness subdriver\n");
6227
6228 mutex_init(&brightness_mutex);
6229
6230 quirks = tpacpi_check_quirks(brightness_quirk_table,
6231 ARRAY_SIZE(brightness_quirk_table));
6232
6233 /* tpacpi_detect_brightness_capabilities() must have run already */
6234
6235 /* if it is unknown, we don't handle it: it wouldn't be safe */
6236 if (tp_features.bright_unkfw)
6237 return 1;
6238
6239 if (!brightness_enable) {
6240 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT,
6241 "brightness support disabled by "
6242 "module parameter\n");
6243 return 1;
6244 }
6245
6246 if (acpi_video_backlight_support()) {
6247 if (brightness_enable > 1) {
6248 pr_info("Standard ACPI backlight interface "
6249 "available, not loading native one\n");
6250 return 1;
6251 } else if (brightness_enable == 1) {
6252 pr_warn("Cannot enable backlight brightness support, "
6253 "ACPI is already handling it. Refer to the "
6254 "acpi_backlight kernel parameter.\n");
6255 return 1;
6256 }
6257 } else if (tp_features.bright_acpimode && brightness_enable > 1) {
6258 pr_notice("Standard ACPI backlight interface not "
6259 "available, thinkpad_acpi native "
6260 "brightness control enabled\n");
6261 }
6262
6263 /*
6264 * Check for module parameter bogosity, note that we
6265 * init brightness_mode to TPACPI_BRGHT_MODE_MAX in order to be
6266 * able to detect "unspecified"
6267 */
6268 if (brightness_mode > TPACPI_BRGHT_MODE_MAX)
6269 return -EINVAL;
6270
6271 /* TPACPI_BRGHT_MODE_AUTO not implemented yet, just use default */
6272 if (brightness_mode == TPACPI_BRGHT_MODE_AUTO ||
6273 brightness_mode == TPACPI_BRGHT_MODE_MAX) {
6274 if (quirks & TPACPI_BRGHT_Q_EC)
6275 brightness_mode = TPACPI_BRGHT_MODE_ECNVRAM;
6276 else
6277 brightness_mode = TPACPI_BRGHT_MODE_UCMS_STEP;
6278
6279 dbg_printk(TPACPI_DBG_BRGHT,
6280 "driver auto-selected brightness_mode=%d\n",
6281 brightness_mode);
6282 }
6283
6284 /* Safety */
6285 if (!tpacpi_is_ibm() &&
6286 (brightness_mode == TPACPI_BRGHT_MODE_ECNVRAM ||
6287 brightness_mode == TPACPI_BRGHT_MODE_EC))
6288 return -EINVAL;
6289
6290 if (tpacpi_brightness_get_raw(&b) < 0)
6291 return 1;
6292
6293 memset(&props, 0, sizeof(struct backlight_properties));
6294 props.type = BACKLIGHT_PLATFORM;
6295 props.max_brightness = bright_maxlvl;
6296 props.brightness = b & TP_EC_BACKLIGHT_LVLMSK;
6297 ibm_backlight_device = backlight_device_register(TPACPI_BACKLIGHT_DEV_NAME,
6298 NULL, NULL,
6299 &ibm_backlight_data,
6300 &props);
6301 if (IS_ERR(ibm_backlight_device)) {
6302 int rc = PTR_ERR(ibm_backlight_device);
6303 ibm_backlight_device = NULL;
6304 pr_err("Could not register backlight device\n");
6305 return rc;
6306 }
6307 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT,
6308 "brightness is supported\n");
6309
6310 if (quirks & TPACPI_BRGHT_Q_ASK) {
6311 pr_notice("brightness: will use unverified default: "
6312 "brightness_mode=%d\n", brightness_mode);
6313 pr_notice("brightness: please report to %s whether it works well "
6314 "or not on your ThinkPad\n", TPACPI_MAIL);
6315 }
6316
6317 /* Added by mistake in early 2007. Probably useless, but it could
6318 * be working around some unknown firmware problem where the value
6319 * read at startup doesn't match the real hardware state... so leave
6320 * it in place just in case */
6321 backlight_update_status(ibm_backlight_device);
6322
6323 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT,
6324 "brightness: registering brightness hotkeys "
6325 "as change notification\n");
6326 tpacpi_hotkey_driver_mask_set(hotkey_driver_mask
6327 | TP_ACPI_HKEY_BRGHTUP_MASK
6328 | TP_ACPI_HKEY_BRGHTDWN_MASK);
6329 return 0;
6330 }
6331
6332 static void brightness_suspend(pm_message_t state)
6333 {
6334 tpacpi_brightness_checkpoint_nvram();
6335 }
6336
6337 static void brightness_shutdown(void)
6338 {
6339 tpacpi_brightness_checkpoint_nvram();
6340 }
6341
6342 static void brightness_exit(void)
6343 {
6344 if (ibm_backlight_device) {
6345 vdbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_BRGHT,
6346 "calling backlight_device_unregister()\n");
6347 backlight_device_unregister(ibm_backlight_device);
6348 }
6349
6350 tpacpi_brightness_checkpoint_nvram();
6351 }
6352
6353 static int brightness_read(struct seq_file *m)
6354 {
6355 int level;
6356
6357 level = brightness_get(NULL);
6358 if (level < 0) {
6359 seq_printf(m, "level:\t\tunreadable\n");
6360 } else {
6361 seq_printf(m, "level:\t\t%d\n", level);
6362 seq_printf(m, "commands:\tup, down\n");
6363 seq_printf(m, "commands:\tlevel <level> (<level> is 0-%d)\n",
6364 bright_maxlvl);
6365 }
6366
6367 return 0;
6368 }
6369
6370 static int brightness_write(char *buf)
6371 {
6372 int level;
6373 int rc;
6374 char *cmd;
6375
6376 level = brightness_get(NULL);
6377 if (level < 0)
6378 return level;
6379
6380 while ((cmd = next_cmd(&buf))) {
6381 if (strlencmp(cmd, "up") == 0) {
6382 if (level < bright_maxlvl)
6383 level++;
6384 } else if (strlencmp(cmd, "down") == 0) {
6385 if (level > 0)
6386 level--;
6387 } else if (sscanf(cmd, "level %d", &level) == 1 &&
6388 level >= 0 && level <= bright_maxlvl) {
6389 /* new level set */
6390 } else
6391 return -EINVAL;
6392 }
6393
6394 tpacpi_disclose_usertask("procfs brightness",
6395 "set level to %d\n", level);
6396
6397 /*
6398 * Now we know what the final level should be, so we try to set it.
6399 * Doing it this way makes the syscall restartable in case of EINTR
6400 */
6401 rc = brightness_set(level);
6402 if (!rc && ibm_backlight_device)
6403 backlight_force_update(ibm_backlight_device,
6404 BACKLIGHT_UPDATE_SYSFS);
6405 return (rc == -EINTR)? -ERESTARTSYS : rc;
6406 }
6407
6408 static struct ibm_struct brightness_driver_data = {
6409 .name = "brightness",
6410 .read = brightness_read,
6411 .write = brightness_write,
6412 .exit = brightness_exit,
6413 .suspend = brightness_suspend,
6414 .shutdown = brightness_shutdown,
6415 };
6416
6417 /*************************************************************************
6418 * Volume subdriver
6419 */
6420
6421 /*
6422 * IBM ThinkPads have a simple volume controller with MUTE gating.
6423 * Very early Lenovo ThinkPads follow the IBM ThinkPad spec.
6424 *
6425 * Since the *61 series (and probably also the later *60 series), Lenovo
6426 * ThinkPads only implement the MUTE gate.
6427 *
6428 * EC register 0x30
6429 * Bit 6: MUTE (1 mutes sound)
6430 * Bit 3-0: Volume
6431 * Other bits should be zero as far as we know.
6432 *
6433 * This is also stored in CMOS NVRAM, byte 0x60, bit 6 (MUTE), and
6434 * bits 3-0 (volume). Other bits in NVRAM may have other functions,
6435 * such as bit 7 which is used to detect repeated presses of MUTE,
6436 * and we leave them unchanged.
6437 */
6438
6439 #ifdef CONFIG_THINKPAD_ACPI_ALSA_SUPPORT
6440
6441 #define TPACPI_ALSA_DRVNAME "ThinkPad EC"
6442 #define TPACPI_ALSA_SHRTNAME "ThinkPad Console Audio Control"
6443 #define TPACPI_ALSA_MIXERNAME TPACPI_ALSA_SHRTNAME
6444
6445 static int alsa_index = ~((1 << (SNDRV_CARDS - 3)) - 1); /* last three slots */
6446 static char *alsa_id = "ThinkPadEC";
6447 static int alsa_enable = SNDRV_DEFAULT_ENABLE1;
6448
6449 struct tpacpi_alsa_data {
6450 struct snd_card *card;
6451 struct snd_ctl_elem_id *ctl_mute_id;
6452 struct snd_ctl_elem_id *ctl_vol_id;
6453 };
6454
6455 static struct snd_card *alsa_card;
6456
6457 enum {
6458 TP_EC_AUDIO = 0x30,
6459
6460 /* TP_EC_AUDIO bits */
6461 TP_EC_AUDIO_MUTESW = 6,
6462
6463 /* TP_EC_AUDIO bitmasks */
6464 TP_EC_AUDIO_LVL_MSK = 0x0F,
6465 TP_EC_AUDIO_MUTESW_MSK = (1 << TP_EC_AUDIO_MUTESW),
6466
6467 /* Maximum volume */
6468 TP_EC_VOLUME_MAX = 14,
6469 };
6470
6471 enum tpacpi_volume_access_mode {
6472 TPACPI_VOL_MODE_AUTO = 0, /* Not implemented yet */
6473 TPACPI_VOL_MODE_EC, /* Pure EC control */
6474 TPACPI_VOL_MODE_UCMS_STEP, /* UCMS step-based control: N/A */
6475 TPACPI_VOL_MODE_ECNVRAM, /* EC control w/ NVRAM store */
6476 TPACPI_VOL_MODE_MAX
6477 };
6478
6479 enum tpacpi_volume_capabilities {
6480 TPACPI_VOL_CAP_AUTO = 0, /* Use white/blacklist */
6481 TPACPI_VOL_CAP_VOLMUTE, /* Output vol and mute */
6482 TPACPI_VOL_CAP_MUTEONLY, /* Output mute only */
6483 TPACPI_VOL_CAP_MAX
6484 };
6485
6486 static enum tpacpi_volume_access_mode volume_mode =
6487 TPACPI_VOL_MODE_MAX;
6488
6489 static enum tpacpi_volume_capabilities volume_capabilities;
6490 static int volume_control_allowed;
6491
6492 /*
6493 * Used to syncronize writers to TP_EC_AUDIO and
6494 * TP_NVRAM_ADDR_MIXER, as we need to do read-modify-write
6495 */
6496 static struct mutex volume_mutex;
6497
6498 static void tpacpi_volume_checkpoint_nvram(void)
6499 {
6500 u8 lec = 0;
6501 u8 b_nvram;
6502 u8 ec_mask;
6503
6504 if (volume_mode != TPACPI_VOL_MODE_ECNVRAM)
6505 return;
6506 if (!volume_control_allowed)
6507 return;
6508
6509 vdbg_printk(TPACPI_DBG_MIXER,
6510 "trying to checkpoint mixer state to NVRAM...\n");
6511
6512 if (tp_features.mixer_no_level_control)
6513 ec_mask = TP_EC_AUDIO_MUTESW_MSK;
6514 else
6515 ec_mask = TP_EC_AUDIO_MUTESW_MSK | TP_EC_AUDIO_LVL_MSK;
6516
6517 if (mutex_lock_killable(&volume_mutex) < 0)
6518 return;
6519
6520 if (unlikely(!acpi_ec_read(TP_EC_AUDIO, &lec)))
6521 goto unlock;
6522 lec &= ec_mask;
6523 b_nvram = nvram_read_byte(TP_NVRAM_ADDR_MIXER);
6524
6525 if (lec != (b_nvram & ec_mask)) {
6526 /* NVRAM needs update */
6527 b_nvram &= ~ec_mask;
6528 b_nvram |= lec;
6529 nvram_write_byte(b_nvram, TP_NVRAM_ADDR_MIXER);
6530 dbg_printk(TPACPI_DBG_MIXER,
6531 "updated NVRAM mixer status to 0x%02x (0x%02x)\n",
6532 (unsigned int) lec, (unsigned int) b_nvram);
6533 } else {
6534 vdbg_printk(TPACPI_DBG_MIXER,
6535 "NVRAM mixer status already is 0x%02x (0x%02x)\n",
6536 (unsigned int) lec, (unsigned int) b_nvram);
6537 }
6538
6539 unlock:
6540 mutex_unlock(&volume_mutex);
6541 }
6542
6543 static int volume_get_status_ec(u8 *status)
6544 {
6545 u8 s;
6546
6547 if (!acpi_ec_read(TP_EC_AUDIO, &s))
6548 return -EIO;
6549
6550 *status = s;
6551
6552 dbg_printk(TPACPI_DBG_MIXER, "status 0x%02x\n", s);
6553
6554 return 0;
6555 }
6556
6557 static int volume_get_status(u8 *status)
6558 {
6559 return volume_get_status_ec(status);
6560 }
6561
6562 static int volume_set_status_ec(const u8 status)
6563 {
6564 if (!acpi_ec_write(TP_EC_AUDIO, status))
6565 return -EIO;
6566
6567 dbg_printk(TPACPI_DBG_MIXER, "set EC mixer to 0x%02x\n", status);
6568
6569 return 0;
6570 }
6571
6572 static int volume_set_status(const u8 status)
6573 {
6574 return volume_set_status_ec(status);
6575 }
6576
6577 /* returns < 0 on error, 0 on no change, 1 on change */
6578 static int __volume_set_mute_ec(const bool mute)
6579 {
6580 int rc;
6581 u8 s, n;
6582
6583 if (mutex_lock_killable(&volume_mutex) < 0)
6584 return -EINTR;
6585
6586 rc = volume_get_status_ec(&s);
6587 if (rc)
6588 goto unlock;
6589
6590 n = (mute) ? s | TP_EC_AUDIO_MUTESW_MSK :
6591 s & ~TP_EC_AUDIO_MUTESW_MSK;
6592
6593 if (n != s) {
6594 rc = volume_set_status_ec(n);
6595 if (!rc)
6596 rc = 1;
6597 }
6598
6599 unlock:
6600 mutex_unlock(&volume_mutex);
6601 return rc;
6602 }
6603
6604 static int volume_alsa_set_mute(const bool mute)
6605 {
6606 dbg_printk(TPACPI_DBG_MIXER, "ALSA: trying to %smute\n",
6607 (mute) ? "" : "un");
6608 return __volume_set_mute_ec(mute);
6609 }
6610
6611 static int volume_set_mute(const bool mute)
6612 {
6613 int rc;
6614
6615 dbg_printk(TPACPI_DBG_MIXER, "trying to %smute\n",
6616 (mute) ? "" : "un");
6617
6618 rc = __volume_set_mute_ec(mute);
6619 return (rc < 0) ? rc : 0;
6620 }
6621
6622 /* returns < 0 on error, 0 on no change, 1 on change */
6623 static int __volume_set_volume_ec(const u8 vol)
6624 {
6625 int rc;
6626 u8 s, n;
6627
6628 if (vol > TP_EC_VOLUME_MAX)
6629 return -EINVAL;
6630
6631 if (mutex_lock_killable(&volume_mutex) < 0)
6632 return -EINTR;
6633
6634 rc = volume_get_status_ec(&s);
6635 if (rc)
6636 goto unlock;
6637
6638 n = (s & ~TP_EC_AUDIO_LVL_MSK) | vol;
6639
6640 if (n != s) {
6641 rc = volume_set_status_ec(n);
6642 if (!rc)
6643 rc = 1;
6644 }
6645
6646 unlock:
6647 mutex_unlock(&volume_mutex);
6648 return rc;
6649 }
6650
6651 static int volume_alsa_set_volume(const u8 vol)
6652 {
6653 dbg_printk(TPACPI_DBG_MIXER,
6654 "ALSA: trying to set volume level to %hu\n", vol);
6655 return __volume_set_volume_ec(vol);
6656 }
6657
6658 static void volume_alsa_notify_change(void)
6659 {
6660 struct tpacpi_alsa_data *d;
6661
6662 if (alsa_card && alsa_card->private_data) {
6663 d = alsa_card->private_data;
6664 if (d->ctl_mute_id)
6665 snd_ctl_notify(alsa_card,
6666 SNDRV_CTL_EVENT_MASK_VALUE,
6667 d->ctl_mute_id);
6668 if (d->ctl_vol_id)
6669 snd_ctl_notify(alsa_card,
6670 SNDRV_CTL_EVENT_MASK_VALUE,
6671 d->ctl_vol_id);
6672 }
6673 }
6674
6675 static int volume_alsa_vol_info(struct snd_kcontrol *kcontrol,
6676 struct snd_ctl_elem_info *uinfo)
6677 {
6678 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
6679 uinfo->count = 1;
6680 uinfo->value.integer.min = 0;
6681 uinfo->value.integer.max = TP_EC_VOLUME_MAX;
6682 return 0;
6683 }
6684
6685 static int volume_alsa_vol_get(struct snd_kcontrol *kcontrol,
6686 struct snd_ctl_elem_value *ucontrol)
6687 {
6688 u8 s;
6689 int rc;
6690
6691 rc = volume_get_status(&s);
6692 if (rc < 0)
6693 return rc;
6694
6695 ucontrol->value.integer.value[0] = s & TP_EC_AUDIO_LVL_MSK;
6696 return 0;
6697 }
6698
6699 static int volume_alsa_vol_put(struct snd_kcontrol *kcontrol,
6700 struct snd_ctl_elem_value *ucontrol)
6701 {
6702 tpacpi_disclose_usertask("ALSA", "set volume to %ld\n",
6703 ucontrol->value.integer.value[0]);
6704 return volume_alsa_set_volume(ucontrol->value.integer.value[0]);
6705 }
6706
6707 #define volume_alsa_mute_info snd_ctl_boolean_mono_info
6708
6709 static int volume_alsa_mute_get(struct snd_kcontrol *kcontrol,
6710 struct snd_ctl_elem_value *ucontrol)
6711 {
6712 u8 s;
6713 int rc;
6714
6715 rc = volume_get_status(&s);
6716 if (rc < 0)
6717 return rc;
6718
6719 ucontrol->value.integer.value[0] =
6720 (s & TP_EC_AUDIO_MUTESW_MSK) ? 0 : 1;
6721 return 0;
6722 }
6723
6724 static int volume_alsa_mute_put(struct snd_kcontrol *kcontrol,
6725 struct snd_ctl_elem_value *ucontrol)
6726 {
6727 tpacpi_disclose_usertask("ALSA", "%smute\n",
6728 ucontrol->value.integer.value[0] ?
6729 "un" : "");
6730 return volume_alsa_set_mute(!ucontrol->value.integer.value[0]);
6731 }
6732
6733 static struct snd_kcontrol_new volume_alsa_control_vol __devinitdata = {
6734 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
6735 .name = "Console Playback Volume",
6736 .index = 0,
6737 .access = SNDRV_CTL_ELEM_ACCESS_READ,
6738 .info = volume_alsa_vol_info,
6739 .get = volume_alsa_vol_get,
6740 };
6741
6742 static struct snd_kcontrol_new volume_alsa_control_mute __devinitdata = {
6743 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
6744 .name = "Console Playback Switch",
6745 .index = 0,
6746 .access = SNDRV_CTL_ELEM_ACCESS_READ,
6747 .info = volume_alsa_mute_info,
6748 .get = volume_alsa_mute_get,
6749 };
6750
6751 static void volume_suspend(pm_message_t state)
6752 {
6753 tpacpi_volume_checkpoint_nvram();
6754 }
6755
6756 static void volume_resume(void)
6757 {
6758 volume_alsa_notify_change();
6759 }
6760
6761 static void volume_shutdown(void)
6762 {
6763 tpacpi_volume_checkpoint_nvram();
6764 }
6765
6766 static void volume_exit(void)
6767 {
6768 if (alsa_card) {
6769 snd_card_free(alsa_card);
6770 alsa_card = NULL;
6771 }
6772
6773 tpacpi_volume_checkpoint_nvram();
6774 }
6775
6776 static int __init volume_create_alsa_mixer(void)
6777 {
6778 struct snd_card *card;
6779 struct tpacpi_alsa_data *data;
6780 struct snd_kcontrol *ctl_vol;
6781 struct snd_kcontrol *ctl_mute;
6782 int rc;
6783
6784 rc = snd_card_create(alsa_index, alsa_id, THIS_MODULE,
6785 sizeof(struct tpacpi_alsa_data), &card);
6786 if (rc < 0 || !card) {
6787 pr_err("Failed to create ALSA card structures: %d\n", rc);
6788 return 1;
6789 }
6790
6791 BUG_ON(!card->private_data);
6792 data = card->private_data;
6793 data->card = card;
6794
6795 strlcpy(card->driver, TPACPI_ALSA_DRVNAME,
6796 sizeof(card->driver));
6797 strlcpy(card->shortname, TPACPI_ALSA_SHRTNAME,
6798 sizeof(card->shortname));
6799 snprintf(card->mixername, sizeof(card->mixername), "ThinkPad EC %s",
6800 (thinkpad_id.ec_version_str) ?
6801 thinkpad_id.ec_version_str : "(unknown)");
6802 snprintf(card->longname, sizeof(card->longname),
6803 "%s at EC reg 0x%02x, fw %s", card->shortname, TP_EC_AUDIO,
6804 (thinkpad_id.ec_version_str) ?
6805 thinkpad_id.ec_version_str : "unknown");
6806
6807 if (volume_control_allowed) {
6808 volume_alsa_control_vol.put = volume_alsa_vol_put;
6809 volume_alsa_control_vol.access =
6810 SNDRV_CTL_ELEM_ACCESS_READWRITE;
6811
6812 volume_alsa_control_mute.put = volume_alsa_mute_put;
6813 volume_alsa_control_mute.access =
6814 SNDRV_CTL_ELEM_ACCESS_READWRITE;
6815 }
6816
6817 if (!tp_features.mixer_no_level_control) {
6818 ctl_vol = snd_ctl_new1(&volume_alsa_control_vol, NULL);
6819 rc = snd_ctl_add(card, ctl_vol);
6820 if (rc < 0) {
6821 pr_err("Failed to create ALSA volume control: %d\n",
6822 rc);
6823 goto err_exit;
6824 }
6825 data->ctl_vol_id = &ctl_vol->id;
6826 }
6827
6828 ctl_mute = snd_ctl_new1(&volume_alsa_control_mute, NULL);
6829 rc = snd_ctl_add(card, ctl_mute);
6830 if (rc < 0) {
6831 pr_err("Failed to create ALSA mute control: %d\n", rc);
6832 goto err_exit;
6833 }
6834 data->ctl_mute_id = &ctl_mute->id;
6835
6836 snd_card_set_dev(card, &tpacpi_pdev->dev);
6837 rc = snd_card_register(card);
6838 if (rc < 0) {
6839 pr_err("Failed to register ALSA card: %d\n", rc);
6840 goto err_exit;
6841 }
6842
6843 alsa_card = card;
6844 return 0;
6845
6846 err_exit:
6847 snd_card_free(card);
6848 return 1;
6849 }
6850
6851 #define TPACPI_VOL_Q_MUTEONLY 0x0001 /* Mute-only control available */
6852 #define TPACPI_VOL_Q_LEVEL 0x0002 /* Volume control available */
6853
6854 static const struct tpacpi_quirk volume_quirk_table[] __initconst = {
6855 /* Whitelist volume level on all IBM by default */
6856 { .vendor = PCI_VENDOR_ID_IBM,
6857 .bios = TPACPI_MATCH_ANY,
6858 .ec = TPACPI_MATCH_ANY,
6859 .quirks = TPACPI_VOL_Q_LEVEL },
6860
6861 /* Lenovo models with volume control (needs confirmation) */
6862 TPACPI_QEC_LNV('7', 'C', TPACPI_VOL_Q_LEVEL), /* R60/i */
6863 TPACPI_QEC_LNV('7', 'E', TPACPI_VOL_Q_LEVEL), /* R60e/i */
6864 TPACPI_QEC_LNV('7', '9', TPACPI_VOL_Q_LEVEL), /* T60/p */
6865 TPACPI_QEC_LNV('7', 'B', TPACPI_VOL_Q_LEVEL), /* X60/s */
6866 TPACPI_QEC_LNV('7', 'J', TPACPI_VOL_Q_LEVEL), /* X60t */
6867 TPACPI_QEC_LNV('7', '7', TPACPI_VOL_Q_LEVEL), /* Z60 */
6868 TPACPI_QEC_LNV('7', 'F', TPACPI_VOL_Q_LEVEL), /* Z61 */
6869
6870 /* Whitelist mute-only on all Lenovo by default */
6871 { .vendor = PCI_VENDOR_ID_LENOVO,
6872 .bios = TPACPI_MATCH_ANY,
6873 .ec = TPACPI_MATCH_ANY,
6874 .quirks = TPACPI_VOL_Q_MUTEONLY }
6875 };
6876
6877 static int __init volume_init(struct ibm_init_struct *iibm)
6878 {
6879 unsigned long quirks;
6880 int rc;
6881
6882 vdbg_printk(TPACPI_DBG_INIT, "initializing volume subdriver\n");
6883
6884 mutex_init(&volume_mutex);
6885
6886 /*
6887 * Check for module parameter bogosity, note that we
6888 * init volume_mode to TPACPI_VOL_MODE_MAX in order to be
6889 * able to detect "unspecified"
6890 */
6891 if (volume_mode > TPACPI_VOL_MODE_MAX)
6892 return -EINVAL;
6893
6894 if (volume_mode == TPACPI_VOL_MODE_UCMS_STEP) {
6895 pr_err("UCMS step volume mode not implemented, "
6896 "please contact %s\n", TPACPI_MAIL);
6897 return 1;
6898 }
6899
6900 if (volume_capabilities >= TPACPI_VOL_CAP_MAX)
6901 return -EINVAL;
6902
6903 /*
6904 * The ALSA mixer is our primary interface.
6905 * When disabled, don't install the subdriver at all
6906 */
6907 if (!alsa_enable) {
6908 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
6909 "ALSA mixer disabled by parameter, "
6910 "not loading volume subdriver...\n");
6911 return 1;
6912 }
6913
6914 quirks = tpacpi_check_quirks(volume_quirk_table,
6915 ARRAY_SIZE(volume_quirk_table));
6916
6917 switch (volume_capabilities) {
6918 case TPACPI_VOL_CAP_AUTO:
6919 if (quirks & TPACPI_VOL_Q_MUTEONLY)
6920 tp_features.mixer_no_level_control = 1;
6921 else if (quirks & TPACPI_VOL_Q_LEVEL)
6922 tp_features.mixer_no_level_control = 0;
6923 else
6924 return 1; /* no mixer */
6925 break;
6926 case TPACPI_VOL_CAP_VOLMUTE:
6927 tp_features.mixer_no_level_control = 0;
6928 break;
6929 case TPACPI_VOL_CAP_MUTEONLY:
6930 tp_features.mixer_no_level_control = 1;
6931 break;
6932 default:
6933 return 1;
6934 }
6935
6936 if (volume_capabilities != TPACPI_VOL_CAP_AUTO)
6937 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
6938 "using user-supplied volume_capabilities=%d\n",
6939 volume_capabilities);
6940
6941 if (volume_mode == TPACPI_VOL_MODE_AUTO ||
6942 volume_mode == TPACPI_VOL_MODE_MAX) {
6943 volume_mode = TPACPI_VOL_MODE_ECNVRAM;
6944
6945 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
6946 "driver auto-selected volume_mode=%d\n",
6947 volume_mode);
6948 } else {
6949 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
6950 "using user-supplied volume_mode=%d\n",
6951 volume_mode);
6952 }
6953
6954 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
6955 "mute is supported, volume control is %s\n",
6956 str_supported(!tp_features.mixer_no_level_control));
6957
6958 rc = volume_create_alsa_mixer();
6959 if (rc) {
6960 pr_err("Could not create the ALSA mixer interface\n");
6961 return rc;
6962 }
6963
6964 pr_info("Console audio control enabled, mode: %s\n",
6965 (volume_control_allowed) ?
6966 "override (read/write)" :
6967 "monitor (read only)");
6968
6969 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
6970 "registering volume hotkeys as change notification\n");
6971 tpacpi_hotkey_driver_mask_set(hotkey_driver_mask
6972 | TP_ACPI_HKEY_VOLUP_MASK
6973 | TP_ACPI_HKEY_VOLDWN_MASK
6974 | TP_ACPI_HKEY_MUTE_MASK);
6975
6976 return 0;
6977 }
6978
6979 static int volume_read(struct seq_file *m)
6980 {
6981 u8 status;
6982
6983 if (volume_get_status(&status) < 0) {
6984 seq_printf(m, "level:\t\tunreadable\n");
6985 } else {
6986 if (tp_features.mixer_no_level_control)
6987 seq_printf(m, "level:\t\tunsupported\n");
6988 else
6989 seq_printf(m, "level:\t\t%d\n",
6990 status & TP_EC_AUDIO_LVL_MSK);
6991
6992 seq_printf(m, "mute:\t\t%s\n",
6993 onoff(status, TP_EC_AUDIO_MUTESW));
6994
6995 if (volume_control_allowed) {
6996 seq_printf(m, "commands:\tunmute, mute\n");
6997 if (!tp_features.mixer_no_level_control) {
6998 seq_printf(m,
6999 "commands:\tup, down\n");
7000 seq_printf(m,
7001 "commands:\tlevel <level>"
7002 " (<level> is 0-%d)\n",
7003 TP_EC_VOLUME_MAX);
7004 }
7005 }
7006 }
7007
7008 return 0;
7009 }
7010
7011 static int volume_write(char *buf)
7012 {
7013 u8 s;
7014 u8 new_level, new_mute;
7015 int l;
7016 char *cmd;
7017 int rc;
7018
7019 /*
7020 * We do allow volume control at driver startup, so that the
7021 * user can set initial state through the volume=... parameter hack.
7022 */
7023 if (!volume_control_allowed && tpacpi_lifecycle != TPACPI_LIFE_INIT) {
7024 if (unlikely(!tp_warned.volume_ctrl_forbidden)) {
7025 tp_warned.volume_ctrl_forbidden = 1;
7026 pr_notice("Console audio control in monitor mode, "
7027 "changes are not allowed\n");
7028 pr_notice("Use the volume_control=1 module parameter "
7029 "to enable volume control\n");
7030 }
7031 return -EPERM;
7032 }
7033
7034 rc = volume_get_status(&s);
7035 if (rc < 0)
7036 return rc;
7037
7038 new_level = s & TP_EC_AUDIO_LVL_MSK;
7039 new_mute = s & TP_EC_AUDIO_MUTESW_MSK;
7040
7041 while ((cmd = next_cmd(&buf))) {
7042 if (!tp_features.mixer_no_level_control) {
7043 if (strlencmp(cmd, "up") == 0) {
7044 if (new_mute)
7045 new_mute = 0;
7046 else if (new_level < TP_EC_VOLUME_MAX)
7047 new_level++;
7048 continue;
7049 } else if (strlencmp(cmd, "down") == 0) {
7050 if (new_mute)
7051 new_mute = 0;
7052 else if (new_level > 0)
7053 new_level--;
7054 continue;
7055 } else if (sscanf(cmd, "level %u", &l) == 1 &&
7056 l >= 0 && l <= TP_EC_VOLUME_MAX) {
7057 new_level = l;
7058 continue;
7059 }
7060 }
7061 if (strlencmp(cmd, "mute") == 0)
7062 new_mute = TP_EC_AUDIO_MUTESW_MSK;
7063 else if (strlencmp(cmd, "unmute") == 0)
7064 new_mute = 0;
7065 else
7066 return -EINVAL;
7067 }
7068
7069 if (tp_features.mixer_no_level_control) {
7070 tpacpi_disclose_usertask("procfs volume", "%smute\n",
7071 new_mute ? "" : "un");
7072 rc = volume_set_mute(!!new_mute);
7073 } else {
7074 tpacpi_disclose_usertask("procfs volume",
7075 "%smute and set level to %d\n",
7076 new_mute ? "" : "un", new_level);
7077 rc = volume_set_status(new_mute | new_level);
7078 }
7079 volume_alsa_notify_change();
7080
7081 return (rc == -EINTR) ? -ERESTARTSYS : rc;
7082 }
7083
7084 static struct ibm_struct volume_driver_data = {
7085 .name = "volume",
7086 .read = volume_read,
7087 .write = volume_write,
7088 .exit = volume_exit,
7089 .suspend = volume_suspend,
7090 .resume = volume_resume,
7091 .shutdown = volume_shutdown,
7092 };
7093
7094 #else /* !CONFIG_THINKPAD_ACPI_ALSA_SUPPORT */
7095
7096 #define alsa_card NULL
7097
7098 static void inline volume_alsa_notify_change(void)
7099 {
7100 }
7101
7102 static int __init volume_init(struct ibm_init_struct *iibm)
7103 {
7104 pr_info("volume: disabled as there is no ALSA support in this kernel\n");
7105
7106 return 1;
7107 }
7108
7109 static struct ibm_struct volume_driver_data = {
7110 .name = "volume",
7111 };
7112
7113 #endif /* CONFIG_THINKPAD_ACPI_ALSA_SUPPORT */
7114
7115 /*************************************************************************
7116 * Fan subdriver
7117 */
7118
7119 /*
7120 * FAN ACCESS MODES
7121 *
7122 * TPACPI_FAN_RD_ACPI_GFAN:
7123 * ACPI GFAN method: returns fan level
7124 *
7125 * see TPACPI_FAN_WR_ACPI_SFAN
7126 * EC 0x2f (HFSP) not available if GFAN exists
7127 *
7128 * TPACPI_FAN_WR_ACPI_SFAN:
7129 * ACPI SFAN method: sets fan level, 0 (stop) to 7 (max)
7130 *
7131 * EC 0x2f (HFSP) might be available *for reading*, but do not use
7132 * it for writing.
7133 *
7134 * TPACPI_FAN_WR_TPEC:
7135 * ThinkPad EC register 0x2f (HFSP): fan control loop mode
7136 * Supported on almost all ThinkPads
7137 *
7138 * Fan speed changes of any sort (including those caused by the
7139 * disengaged mode) are usually done slowly by the firmware as the
7140 * maximum amount of fan duty cycle change per second seems to be
7141 * limited.
7142 *
7143 * Reading is not available if GFAN exists.
7144 * Writing is not available if SFAN exists.
7145 *
7146 * Bits
7147 * 7 automatic mode engaged;
7148 * (default operation mode of the ThinkPad)
7149 * fan level is ignored in this mode.
7150 * 6 full speed mode (takes precedence over bit 7);
7151 * not available on all thinkpads. May disable
7152 * the tachometer while the fan controller ramps up
7153 * the speed (which can take up to a few *minutes*).
7154 * Speeds up fan to 100% duty-cycle, which is far above
7155 * the standard RPM levels. It is not impossible that
7156 * it could cause hardware damage.
7157 * 5-3 unused in some models. Extra bits for fan level
7158 * in others, but still useless as all values above
7159 * 7 map to the same speed as level 7 in these models.
7160 * 2-0 fan level (0..7 usually)
7161 * 0x00 = stop
7162 * 0x07 = max (set when temperatures critical)
7163 * Some ThinkPads may have other levels, see
7164 * TPACPI_FAN_WR_ACPI_FANS (X31/X40/X41)
7165 *
7166 * FIRMWARE BUG: on some models, EC 0x2f might not be initialized at
7167 * boot. Apparently the EC does not initialize it, so unless ACPI DSDT
7168 * does so, its initial value is meaningless (0x07).
7169 *
7170 * For firmware bugs, refer to:
7171 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
7172 *
7173 * ----
7174 *
7175 * ThinkPad EC register 0x84 (LSB), 0x85 (MSB):
7176 * Main fan tachometer reading (in RPM)
7177 *
7178 * This register is present on all ThinkPads with a new-style EC, and
7179 * it is known not to be present on the A21m/e, and T22, as there is
7180 * something else in offset 0x84 according to the ACPI DSDT. Other
7181 * ThinkPads from this same time period (and earlier) probably lack the
7182 * tachometer as well.
7183 *
7184 * Unfortunately a lot of ThinkPads with new-style ECs but whose firmware
7185 * was never fixed by IBM to report the EC firmware version string
7186 * probably support the tachometer (like the early X models), so
7187 * detecting it is quite hard. We need more data to know for sure.
7188 *
7189 * FIRMWARE BUG: always read 0x84 first, otherwise incorrect readings
7190 * might result.
7191 *
7192 * FIRMWARE BUG: may go stale while the EC is switching to full speed
7193 * mode.
7194 *
7195 * For firmware bugs, refer to:
7196 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
7197 *
7198 * ----
7199 *
7200 * ThinkPad EC register 0x31 bit 0 (only on select models)
7201 *
7202 * When bit 0 of EC register 0x31 is zero, the tachometer registers
7203 * show the speed of the main fan. When bit 0 of EC register 0x31
7204 * is one, the tachometer registers show the speed of the auxiliary
7205 * fan.
7206 *
7207 * Fan control seems to affect both fans, regardless of the state
7208 * of this bit.
7209 *
7210 * So far, only the firmware for the X60/X61 non-tablet versions
7211 * seem to support this (firmware TP-7M).
7212 *
7213 * TPACPI_FAN_WR_ACPI_FANS:
7214 * ThinkPad X31, X40, X41. Not available in the X60.
7215 *
7216 * FANS ACPI handle: takes three arguments: low speed, medium speed,
7217 * high speed. ACPI DSDT seems to map these three speeds to levels
7218 * as follows: STOP LOW LOW MED MED HIGH HIGH HIGH HIGH
7219 * (this map is stored on FAN0..FAN8 as "0,1,1,2,2,3,3,3,3")
7220 *
7221 * The speeds are stored on handles
7222 * (FANA:FAN9), (FANC:FANB), (FANE:FAND).
7223 *
7224 * There are three default speed sets, accessible as handles:
7225 * FS1L,FS1M,FS1H; FS2L,FS2M,FS2H; FS3L,FS3M,FS3H
7226 *
7227 * ACPI DSDT switches which set is in use depending on various
7228 * factors.
7229 *
7230 * TPACPI_FAN_WR_TPEC is also available and should be used to
7231 * command the fan. The X31/X40/X41 seems to have 8 fan levels,
7232 * but the ACPI tables just mention level 7.
7233 */
7234
7235 enum { /* Fan control constants */
7236 fan_status_offset = 0x2f, /* EC register 0x2f */
7237 fan_rpm_offset = 0x84, /* EC register 0x84: LSB, 0x85 MSB (RPM)
7238 * 0x84 must be read before 0x85 */
7239 fan_select_offset = 0x31, /* EC register 0x31 (Firmware 7M)
7240 bit 0 selects which fan is active */
7241
7242 TP_EC_FAN_FULLSPEED = 0x40, /* EC fan mode: full speed */
7243 TP_EC_FAN_AUTO = 0x80, /* EC fan mode: auto fan control */
7244
7245 TPACPI_FAN_LAST_LEVEL = 0x100, /* Use cached last-seen fan level */
7246 };
7247
7248 enum fan_status_access_mode {
7249 TPACPI_FAN_NONE = 0, /* No fan status or control */
7250 TPACPI_FAN_RD_ACPI_GFAN, /* Use ACPI GFAN */
7251 TPACPI_FAN_RD_TPEC, /* Use ACPI EC regs 0x2f, 0x84-0x85 */
7252 };
7253
7254 enum fan_control_access_mode {
7255 TPACPI_FAN_WR_NONE = 0, /* No fan control */
7256 TPACPI_FAN_WR_ACPI_SFAN, /* Use ACPI SFAN */
7257 TPACPI_FAN_WR_TPEC, /* Use ACPI EC reg 0x2f */
7258 TPACPI_FAN_WR_ACPI_FANS, /* Use ACPI FANS and EC reg 0x2f */
7259 };
7260
7261 enum fan_control_commands {
7262 TPACPI_FAN_CMD_SPEED = 0x0001, /* speed command */
7263 TPACPI_FAN_CMD_LEVEL = 0x0002, /* level command */
7264 TPACPI_FAN_CMD_ENABLE = 0x0004, /* enable/disable cmd,
7265 * and also watchdog cmd */
7266 };
7267
7268 static int fan_control_allowed;
7269
7270 static enum fan_status_access_mode fan_status_access_mode;
7271 static enum fan_control_access_mode fan_control_access_mode;
7272 static enum fan_control_commands fan_control_commands;
7273
7274 static u8 fan_control_initial_status;
7275 static u8 fan_control_desired_level;
7276 static u8 fan_control_resume_level;
7277 static int fan_watchdog_maxinterval;
7278
7279 static struct mutex fan_mutex;
7280
7281 static void fan_watchdog_fire(struct work_struct *ignored);
7282 static DECLARE_DELAYED_WORK(fan_watchdog_task, fan_watchdog_fire);
7283
7284 TPACPI_HANDLE(fans, ec, "FANS"); /* X31, X40, X41 */
7285 TPACPI_HANDLE(gfan, ec, "GFAN", /* 570 */
7286 "\\FSPD", /* 600e/x, 770e, 770x */
7287 ); /* all others */
7288 TPACPI_HANDLE(sfan, ec, "SFAN", /* 570 */
7289 "JFNS", /* 770x-JL */
7290 ); /* all others */
7291
7292 /*
7293 * Unitialized HFSP quirk: ACPI DSDT and EC fail to initialize the
7294 * HFSP register at boot, so it contains 0x07 but the Thinkpad could
7295 * be in auto mode (0x80).
7296 *
7297 * This is corrected by any write to HFSP either by the driver, or
7298 * by the firmware.
7299 *
7300 * We assume 0x07 really means auto mode while this quirk is active,
7301 * as this is far more likely than the ThinkPad being in level 7,
7302 * which is only used by the firmware during thermal emergencies.
7303 *
7304 * Enable for TP-1Y (T43), TP-78 (R51e), TP-76 (R52),
7305 * TP-70 (T43, R52), which are known to be buggy.
7306 */
7307
7308 static void fan_quirk1_setup(void)
7309 {
7310 if (fan_control_initial_status == 0x07) {
7311 pr_notice("fan_init: initial fan status is unknown, "
7312 "assuming it is in auto mode\n");
7313 tp_features.fan_ctrl_status_undef = 1;
7314 }
7315 }
7316
7317 static void fan_quirk1_handle(u8 *fan_status)
7318 {
7319 if (unlikely(tp_features.fan_ctrl_status_undef)) {
7320 if (*fan_status != fan_control_initial_status) {
7321 /* something changed the HFSP regisnter since
7322 * driver init time, so it is not undefined
7323 * anymore */
7324 tp_features.fan_ctrl_status_undef = 0;
7325 } else {
7326 /* Return most likely status. In fact, it
7327 * might be the only possible status */
7328 *fan_status = TP_EC_FAN_AUTO;
7329 }
7330 }
7331 }
7332
7333 /* Select main fan on X60/X61, NOOP on others */
7334 static bool fan_select_fan1(void)
7335 {
7336 if (tp_features.second_fan) {
7337 u8 val;
7338
7339 if (ec_read(fan_select_offset, &val) < 0)
7340 return false;
7341 val &= 0xFEU;
7342 if (ec_write(fan_select_offset, val) < 0)
7343 return false;
7344 }
7345 return true;
7346 }
7347
7348 /* Select secondary fan on X60/X61 */
7349 static bool fan_select_fan2(void)
7350 {
7351 u8 val;
7352
7353 if (!tp_features.second_fan)
7354 return false;
7355
7356 if (ec_read(fan_select_offset, &val) < 0)
7357 return false;
7358 val |= 0x01U;
7359 if (ec_write(fan_select_offset, val) < 0)
7360 return false;
7361
7362 return true;
7363 }
7364
7365 /*
7366 * Call with fan_mutex held
7367 */
7368 static void fan_update_desired_level(u8 status)
7369 {
7370 if ((status &
7371 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
7372 if (status > 7)
7373 fan_control_desired_level = 7;
7374 else
7375 fan_control_desired_level = status;
7376 }
7377 }
7378
7379 static int fan_get_status(u8 *status)
7380 {
7381 u8 s;
7382
7383 /* TODO:
7384 * Add TPACPI_FAN_RD_ACPI_FANS ? */
7385
7386 switch (fan_status_access_mode) {
7387 case TPACPI_FAN_RD_ACPI_GFAN:
7388 /* 570, 600e/x, 770e, 770x */
7389
7390 if (unlikely(!acpi_evalf(gfan_handle, &s, NULL, "d")))
7391 return -EIO;
7392
7393 if (likely(status))
7394 *status = s & 0x07;
7395
7396 break;
7397
7398 case TPACPI_FAN_RD_TPEC:
7399 /* all except 570, 600e/x, 770e, 770x */
7400 if (unlikely(!acpi_ec_read(fan_status_offset, &s)))
7401 return -EIO;
7402
7403 if (likely(status)) {
7404 *status = s;
7405 fan_quirk1_handle(status);
7406 }
7407
7408 break;
7409
7410 default:
7411 return -ENXIO;
7412 }
7413
7414 return 0;
7415 }
7416
7417 static int fan_get_status_safe(u8 *status)
7418 {
7419 int rc;
7420 u8 s;
7421
7422 if (mutex_lock_killable(&fan_mutex))
7423 return -ERESTARTSYS;
7424 rc = fan_get_status(&s);
7425 if (!rc)
7426 fan_update_desired_level(s);
7427 mutex_unlock(&fan_mutex);
7428
7429 if (status)
7430 *status = s;
7431
7432 return rc;
7433 }
7434
7435 static int fan_get_speed(unsigned int *speed)
7436 {
7437 u8 hi, lo;
7438
7439 switch (fan_status_access_mode) {
7440 case TPACPI_FAN_RD_TPEC:
7441 /* all except 570, 600e/x, 770e, 770x */
7442 if (unlikely(!fan_select_fan1()))
7443 return -EIO;
7444 if (unlikely(!acpi_ec_read(fan_rpm_offset, &lo) ||
7445 !acpi_ec_read(fan_rpm_offset + 1, &hi)))
7446 return -EIO;
7447
7448 if (likely(speed))
7449 *speed = (hi << 8) | lo;
7450
7451 break;
7452
7453 default:
7454 return -ENXIO;
7455 }
7456
7457 return 0;
7458 }
7459
7460 static int fan2_get_speed(unsigned int *speed)
7461 {
7462 u8 hi, lo;
7463 bool rc;
7464
7465 switch (fan_status_access_mode) {
7466 case TPACPI_FAN_RD_TPEC:
7467 /* all except 570, 600e/x, 770e, 770x */
7468 if (unlikely(!fan_select_fan2()))
7469 return -EIO;
7470 rc = !acpi_ec_read(fan_rpm_offset, &lo) ||
7471 !acpi_ec_read(fan_rpm_offset + 1, &hi);
7472 fan_select_fan1(); /* play it safe */
7473 if (rc)
7474 return -EIO;
7475
7476 if (likely(speed))
7477 *speed = (hi << 8) | lo;
7478
7479 break;
7480
7481 default:
7482 return -ENXIO;
7483 }
7484
7485 return 0;
7486 }
7487
7488 static int fan_set_level(int level)
7489 {
7490 if (!fan_control_allowed)
7491 return -EPERM;
7492
7493 switch (fan_control_access_mode) {
7494 case TPACPI_FAN_WR_ACPI_SFAN:
7495 if (level >= 0 && level <= 7) {
7496 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", level))
7497 return -EIO;
7498 } else
7499 return -EINVAL;
7500 break;
7501
7502 case TPACPI_FAN_WR_ACPI_FANS:
7503 case TPACPI_FAN_WR_TPEC:
7504 if (!(level & TP_EC_FAN_AUTO) &&
7505 !(level & TP_EC_FAN_FULLSPEED) &&
7506 ((level < 0) || (level > 7)))
7507 return -EINVAL;
7508
7509 /* safety net should the EC not support AUTO
7510 * or FULLSPEED mode bits and just ignore them */
7511 if (level & TP_EC_FAN_FULLSPEED)
7512 level |= 7; /* safety min speed 7 */
7513 else if (level & TP_EC_FAN_AUTO)
7514 level |= 4; /* safety min speed 4 */
7515
7516 if (!acpi_ec_write(fan_status_offset, level))
7517 return -EIO;
7518 else
7519 tp_features.fan_ctrl_status_undef = 0;
7520 break;
7521
7522 default:
7523 return -ENXIO;
7524 }
7525
7526 vdbg_printk(TPACPI_DBG_FAN,
7527 "fan control: set fan control register to 0x%02x\n", level);
7528 return 0;
7529 }
7530
7531 static int fan_set_level_safe(int level)
7532 {
7533 int rc;
7534
7535 if (!fan_control_allowed)
7536 return -EPERM;
7537
7538 if (mutex_lock_killable(&fan_mutex))
7539 return -ERESTARTSYS;
7540
7541 if (level == TPACPI_FAN_LAST_LEVEL)
7542 level = fan_control_desired_level;
7543
7544 rc = fan_set_level(level);
7545 if (!rc)
7546 fan_update_desired_level(level);
7547
7548 mutex_unlock(&fan_mutex);
7549 return rc;
7550 }
7551
7552 static int fan_set_enable(void)
7553 {
7554 u8 s;
7555 int rc;
7556
7557 if (!fan_control_allowed)
7558 return -EPERM;
7559
7560 if (mutex_lock_killable(&fan_mutex))
7561 return -ERESTARTSYS;
7562
7563 switch (fan_control_access_mode) {
7564 case TPACPI_FAN_WR_ACPI_FANS:
7565 case TPACPI_FAN_WR_TPEC:
7566 rc = fan_get_status(&s);
7567 if (rc < 0)
7568 break;
7569
7570 /* Don't go out of emergency fan mode */
7571 if (s != 7) {
7572 s &= 0x07;
7573 s |= TP_EC_FAN_AUTO | 4; /* min fan speed 4 */
7574 }
7575
7576 if (!acpi_ec_write(fan_status_offset, s))
7577 rc = -EIO;
7578 else {
7579 tp_features.fan_ctrl_status_undef = 0;
7580 rc = 0;
7581 }
7582 break;
7583
7584 case TPACPI_FAN_WR_ACPI_SFAN:
7585 rc = fan_get_status(&s);
7586 if (rc < 0)
7587 break;
7588
7589 s &= 0x07;
7590
7591 /* Set fan to at least level 4 */
7592 s |= 4;
7593
7594 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", s))
7595 rc = -EIO;
7596 else
7597 rc = 0;
7598 break;
7599
7600 default:
7601 rc = -ENXIO;
7602 }
7603
7604 mutex_unlock(&fan_mutex);
7605
7606 if (!rc)
7607 vdbg_printk(TPACPI_DBG_FAN,
7608 "fan control: set fan control register to 0x%02x\n",
7609 s);
7610 return rc;
7611 }
7612
7613 static int fan_set_disable(void)
7614 {
7615 int rc;
7616
7617 if (!fan_control_allowed)
7618 return -EPERM;
7619
7620 if (mutex_lock_killable(&fan_mutex))
7621 return -ERESTARTSYS;
7622
7623 rc = 0;
7624 switch (fan_control_access_mode) {
7625 case TPACPI_FAN_WR_ACPI_FANS:
7626 case TPACPI_FAN_WR_TPEC:
7627 if (!acpi_ec_write(fan_status_offset, 0x00))
7628 rc = -EIO;
7629 else {
7630 fan_control_desired_level = 0;
7631 tp_features.fan_ctrl_status_undef = 0;
7632 }
7633 break;
7634
7635 case TPACPI_FAN_WR_ACPI_SFAN:
7636 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", 0x00))
7637 rc = -EIO;
7638 else
7639 fan_control_desired_level = 0;
7640 break;
7641
7642 default:
7643 rc = -ENXIO;
7644 }
7645
7646 if (!rc)
7647 vdbg_printk(TPACPI_DBG_FAN,
7648 "fan control: set fan control register to 0\n");
7649
7650 mutex_unlock(&fan_mutex);
7651 return rc;
7652 }
7653
7654 static int fan_set_speed(int speed)
7655 {
7656 int rc;
7657
7658 if (!fan_control_allowed)
7659 return -EPERM;
7660
7661 if (mutex_lock_killable(&fan_mutex))
7662 return -ERESTARTSYS;
7663
7664 rc = 0;
7665 switch (fan_control_access_mode) {
7666 case TPACPI_FAN_WR_ACPI_FANS:
7667 if (speed >= 0 && speed <= 65535) {
7668 if (!acpi_evalf(fans_handle, NULL, NULL, "vddd",
7669 speed, speed, speed))
7670 rc = -EIO;
7671 } else
7672 rc = -EINVAL;
7673 break;
7674
7675 default:
7676 rc = -ENXIO;
7677 }
7678
7679 mutex_unlock(&fan_mutex);
7680 return rc;
7681 }
7682
7683 static void fan_watchdog_reset(void)
7684 {
7685 static int fan_watchdog_active;
7686
7687 if (fan_control_access_mode == TPACPI_FAN_WR_NONE)
7688 return;
7689
7690 if (fan_watchdog_active)
7691 cancel_delayed_work(&fan_watchdog_task);
7692
7693 if (fan_watchdog_maxinterval > 0 &&
7694 tpacpi_lifecycle != TPACPI_LIFE_EXITING) {
7695 fan_watchdog_active = 1;
7696 if (!queue_delayed_work(tpacpi_wq, &fan_watchdog_task,
7697 msecs_to_jiffies(fan_watchdog_maxinterval
7698 * 1000))) {
7699 pr_err("failed to queue the fan watchdog, "
7700 "watchdog will not trigger\n");
7701 }
7702 } else
7703 fan_watchdog_active = 0;
7704 }
7705
7706 static void fan_watchdog_fire(struct work_struct *ignored)
7707 {
7708 int rc;
7709
7710 if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
7711 return;
7712
7713 pr_notice("fan watchdog: enabling fan\n");
7714 rc = fan_set_enable();
7715 if (rc < 0) {
7716 pr_err("fan watchdog: error %d while enabling fan, "
7717 "will try again later...\n", -rc);
7718 /* reschedule for later */
7719 fan_watchdog_reset();
7720 }
7721 }
7722
7723 /*
7724 * SYSFS fan layout: hwmon compatible (device)
7725 *
7726 * pwm*_enable:
7727 * 0: "disengaged" mode
7728 * 1: manual mode
7729 * 2: native EC "auto" mode (recommended, hardware default)
7730 *
7731 * pwm*: set speed in manual mode, ignored otherwise.
7732 * 0 is level 0; 255 is level 7. Intermediate points done with linear
7733 * interpolation.
7734 *
7735 * fan*_input: tachometer reading, RPM
7736 *
7737 *
7738 * SYSFS fan layout: extensions
7739 *
7740 * fan_watchdog (driver):
7741 * fan watchdog interval in seconds, 0 disables (default), max 120
7742 */
7743
7744 /* sysfs fan pwm1_enable ----------------------------------------------- */
7745 static ssize_t fan_pwm1_enable_show(struct device *dev,
7746 struct device_attribute *attr,
7747 char *buf)
7748 {
7749 int res, mode;
7750 u8 status;
7751
7752 res = fan_get_status_safe(&status);
7753 if (res)
7754 return res;
7755
7756 if (status & TP_EC_FAN_FULLSPEED) {
7757 mode = 0;
7758 } else if (status & TP_EC_FAN_AUTO) {
7759 mode = 2;
7760 } else
7761 mode = 1;
7762
7763 return snprintf(buf, PAGE_SIZE, "%d\n", mode);
7764 }
7765
7766 static ssize_t fan_pwm1_enable_store(struct device *dev,
7767 struct device_attribute *attr,
7768 const char *buf, size_t count)
7769 {
7770 unsigned long t;
7771 int res, level;
7772
7773 if (parse_strtoul(buf, 2, &t))
7774 return -EINVAL;
7775
7776 tpacpi_disclose_usertask("hwmon pwm1_enable",
7777 "set fan mode to %lu\n", t);
7778
7779 switch (t) {
7780 case 0:
7781 level = TP_EC_FAN_FULLSPEED;
7782 break;
7783 case 1:
7784 level = TPACPI_FAN_LAST_LEVEL;
7785 break;
7786 case 2:
7787 level = TP_EC_FAN_AUTO;
7788 break;
7789 case 3:
7790 /* reserved for software-controlled auto mode */
7791 return -ENOSYS;
7792 default:
7793 return -EINVAL;
7794 }
7795
7796 res = fan_set_level_safe(level);
7797 if (res == -ENXIO)
7798 return -EINVAL;
7799 else if (res < 0)
7800 return res;
7801
7802 fan_watchdog_reset();
7803
7804 return count;
7805 }
7806
7807 static struct device_attribute dev_attr_fan_pwm1_enable =
7808 __ATTR(pwm1_enable, S_IWUSR | S_IRUGO,
7809 fan_pwm1_enable_show, fan_pwm1_enable_store);
7810
7811 /* sysfs fan pwm1 ------------------------------------------------------ */
7812 static ssize_t fan_pwm1_show(struct device *dev,
7813 struct device_attribute *attr,
7814 char *buf)
7815 {
7816 int res;
7817 u8 status;
7818
7819 res = fan_get_status_safe(&status);
7820 if (res)
7821 return res;
7822
7823 if ((status &
7824 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) != 0)
7825 status = fan_control_desired_level;
7826
7827 if (status > 7)
7828 status = 7;
7829
7830 return snprintf(buf, PAGE_SIZE, "%u\n", (status * 255) / 7);
7831 }
7832
7833 static ssize_t fan_pwm1_store(struct device *dev,
7834 struct device_attribute *attr,
7835 const char *buf, size_t count)
7836 {
7837 unsigned long s;
7838 int rc;
7839 u8 status, newlevel;
7840
7841 if (parse_strtoul(buf, 255, &s))
7842 return -EINVAL;
7843
7844 tpacpi_disclose_usertask("hwmon pwm1",
7845 "set fan speed to %lu\n", s);
7846
7847 /* scale down from 0-255 to 0-7 */
7848 newlevel = (s >> 5) & 0x07;
7849
7850 if (mutex_lock_killable(&fan_mutex))
7851 return -ERESTARTSYS;
7852
7853 rc = fan_get_status(&status);
7854 if (!rc && (status &
7855 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
7856 rc = fan_set_level(newlevel);
7857 if (rc == -ENXIO)
7858 rc = -EINVAL;
7859 else if (!rc) {
7860 fan_update_desired_level(newlevel);
7861 fan_watchdog_reset();
7862 }
7863 }
7864
7865 mutex_unlock(&fan_mutex);
7866 return (rc)? rc : count;
7867 }
7868
7869 static struct device_attribute dev_attr_fan_pwm1 =
7870 __ATTR(pwm1, S_IWUSR | S_IRUGO,
7871 fan_pwm1_show, fan_pwm1_store);
7872
7873 /* sysfs fan fan1_input ------------------------------------------------ */
7874 static ssize_t fan_fan1_input_show(struct device *dev,
7875 struct device_attribute *attr,
7876 char *buf)
7877 {
7878 int res;
7879 unsigned int speed;
7880
7881 res = fan_get_speed(&speed);
7882 if (res < 0)
7883 return res;
7884
7885 return snprintf(buf, PAGE_SIZE, "%u\n", speed);
7886 }
7887
7888 static struct device_attribute dev_attr_fan_fan1_input =
7889 __ATTR(fan1_input, S_IRUGO,
7890 fan_fan1_input_show, NULL);
7891
7892 /* sysfs fan fan2_input ------------------------------------------------ */
7893 static ssize_t fan_fan2_input_show(struct device *dev,
7894 struct device_attribute *attr,
7895 char *buf)
7896 {
7897 int res;
7898 unsigned int speed;
7899
7900 res = fan2_get_speed(&speed);
7901 if (res < 0)
7902 return res;
7903
7904 return snprintf(buf, PAGE_SIZE, "%u\n", speed);
7905 }
7906
7907 static struct device_attribute dev_attr_fan_fan2_input =
7908 __ATTR(fan2_input, S_IRUGO,
7909 fan_fan2_input_show, NULL);
7910
7911 /* sysfs fan fan_watchdog (hwmon driver) ------------------------------- */
7912 static ssize_t fan_fan_watchdog_show(struct device_driver *drv,
7913 char *buf)
7914 {
7915 return snprintf(buf, PAGE_SIZE, "%u\n", fan_watchdog_maxinterval);
7916 }
7917
7918 static ssize_t fan_fan_watchdog_store(struct device_driver *drv,
7919 const char *buf, size_t count)
7920 {
7921 unsigned long t;
7922
7923 if (parse_strtoul(buf, 120, &t))
7924 return -EINVAL;
7925
7926 if (!fan_control_allowed)
7927 return -EPERM;
7928
7929 fan_watchdog_maxinterval = t;
7930 fan_watchdog_reset();
7931
7932 tpacpi_disclose_usertask("fan_watchdog", "set to %lu\n", t);
7933
7934 return count;
7935 }
7936
7937 static DRIVER_ATTR(fan_watchdog, S_IWUSR | S_IRUGO,
7938 fan_fan_watchdog_show, fan_fan_watchdog_store);
7939
7940 /* --------------------------------------------------------------------- */
7941 static struct attribute *fan_attributes[] = {
7942 &dev_attr_fan_pwm1_enable.attr, &dev_attr_fan_pwm1.attr,
7943 &dev_attr_fan_fan1_input.attr,
7944 NULL, /* for fan2_input */
7945 NULL
7946 };
7947
7948 static const struct attribute_group fan_attr_group = {
7949 .attrs = fan_attributes,
7950 };
7951
7952 #define TPACPI_FAN_Q1 0x0001 /* Unitialized HFSP */
7953 #define TPACPI_FAN_2FAN 0x0002 /* EC 0x31 bit 0 selects fan2 */
7954
7955 #define TPACPI_FAN_QI(__id1, __id2, __quirks) \
7956 { .vendor = PCI_VENDOR_ID_IBM, \
7957 .bios = TPACPI_MATCH_ANY, \
7958 .ec = TPID(__id1, __id2), \
7959 .quirks = __quirks }
7960
7961 #define TPACPI_FAN_QL(__id1, __id2, __quirks) \
7962 { .vendor = PCI_VENDOR_ID_LENOVO, \
7963 .bios = TPACPI_MATCH_ANY, \
7964 .ec = TPID(__id1, __id2), \
7965 .quirks = __quirks }
7966
7967 static const struct tpacpi_quirk fan_quirk_table[] __initconst = {
7968 TPACPI_FAN_QI('1', 'Y', TPACPI_FAN_Q1),
7969 TPACPI_FAN_QI('7', '8', TPACPI_FAN_Q1),
7970 TPACPI_FAN_QI('7', '6', TPACPI_FAN_Q1),
7971 TPACPI_FAN_QI('7', '0', TPACPI_FAN_Q1),
7972 TPACPI_FAN_QL('7', 'M', TPACPI_FAN_2FAN),
7973 };
7974
7975 #undef TPACPI_FAN_QL
7976 #undef TPACPI_FAN_QI
7977
7978 static int __init fan_init(struct ibm_init_struct *iibm)
7979 {
7980 int rc;
7981 unsigned long quirks;
7982
7983 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
7984 "initializing fan subdriver\n");
7985
7986 mutex_init(&fan_mutex);
7987 fan_status_access_mode = TPACPI_FAN_NONE;
7988 fan_control_access_mode = TPACPI_FAN_WR_NONE;
7989 fan_control_commands = 0;
7990 fan_watchdog_maxinterval = 0;
7991 tp_features.fan_ctrl_status_undef = 0;
7992 tp_features.second_fan = 0;
7993 fan_control_desired_level = 7;
7994
7995 if (tpacpi_is_ibm()) {
7996 TPACPI_ACPIHANDLE_INIT(fans);
7997 TPACPI_ACPIHANDLE_INIT(gfan);
7998 TPACPI_ACPIHANDLE_INIT(sfan);
7999 }
8000
8001 quirks = tpacpi_check_quirks(fan_quirk_table,
8002 ARRAY_SIZE(fan_quirk_table));
8003
8004 if (gfan_handle) {
8005 /* 570, 600e/x, 770e, 770x */
8006 fan_status_access_mode = TPACPI_FAN_RD_ACPI_GFAN;
8007 } else {
8008 /* all other ThinkPads: note that even old-style
8009 * ThinkPad ECs supports the fan control register */
8010 if (likely(acpi_ec_read(fan_status_offset,
8011 &fan_control_initial_status))) {
8012 fan_status_access_mode = TPACPI_FAN_RD_TPEC;
8013 if (quirks & TPACPI_FAN_Q1)
8014 fan_quirk1_setup();
8015 if (quirks & TPACPI_FAN_2FAN) {
8016 tp_features.second_fan = 1;
8017 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
8018 "secondary fan support enabled\n");
8019 }
8020 } else {
8021 pr_err("ThinkPad ACPI EC access misbehaving, "
8022 "fan status and control unavailable\n");
8023 return 1;
8024 }
8025 }
8026
8027 if (sfan_handle) {
8028 /* 570, 770x-JL */
8029 fan_control_access_mode = TPACPI_FAN_WR_ACPI_SFAN;
8030 fan_control_commands |=
8031 TPACPI_FAN_CMD_LEVEL | TPACPI_FAN_CMD_ENABLE;
8032 } else {
8033 if (!gfan_handle) {
8034 /* gfan without sfan means no fan control */
8035 /* all other models implement TP EC 0x2f control */
8036
8037 if (fans_handle) {
8038 /* X31, X40, X41 */
8039 fan_control_access_mode =
8040 TPACPI_FAN_WR_ACPI_FANS;
8041 fan_control_commands |=
8042 TPACPI_FAN_CMD_SPEED |
8043 TPACPI_FAN_CMD_LEVEL |
8044 TPACPI_FAN_CMD_ENABLE;
8045 } else {
8046 fan_control_access_mode = TPACPI_FAN_WR_TPEC;
8047 fan_control_commands |=
8048 TPACPI_FAN_CMD_LEVEL |
8049 TPACPI_FAN_CMD_ENABLE;
8050 }
8051 }
8052 }
8053
8054 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
8055 "fan is %s, modes %d, %d\n",
8056 str_supported(fan_status_access_mode != TPACPI_FAN_NONE ||
8057 fan_control_access_mode != TPACPI_FAN_WR_NONE),
8058 fan_status_access_mode, fan_control_access_mode);
8059
8060 /* fan control master switch */
8061 if (!fan_control_allowed) {
8062 fan_control_access_mode = TPACPI_FAN_WR_NONE;
8063 fan_control_commands = 0;
8064 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
8065 "fan control features disabled by parameter\n");
8066 }
8067
8068 /* update fan_control_desired_level */
8069 if (fan_status_access_mode != TPACPI_FAN_NONE)
8070 fan_get_status_safe(NULL);
8071
8072 if (fan_status_access_mode != TPACPI_FAN_NONE ||
8073 fan_control_access_mode != TPACPI_FAN_WR_NONE) {
8074 if (tp_features.second_fan) {
8075 /* attach second fan tachometer */
8076 fan_attributes[ARRAY_SIZE(fan_attributes)-2] =
8077 &dev_attr_fan_fan2_input.attr;
8078 }
8079 rc = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
8080 &fan_attr_group);
8081 if (rc < 0)
8082 return rc;
8083
8084 rc = driver_create_file(&tpacpi_hwmon_pdriver.driver,
8085 &driver_attr_fan_watchdog);
8086 if (rc < 0) {
8087 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
8088 &fan_attr_group);
8089 return rc;
8090 }
8091 return 0;
8092 } else
8093 return 1;
8094 }
8095
8096 static void fan_exit(void)
8097 {
8098 vdbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_FAN,
8099 "cancelling any pending fan watchdog tasks\n");
8100
8101 /* FIXME: can we really do this unconditionally? */
8102 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj, &fan_attr_group);
8103 driver_remove_file(&tpacpi_hwmon_pdriver.driver,
8104 &driver_attr_fan_watchdog);
8105
8106 cancel_delayed_work(&fan_watchdog_task);
8107 flush_workqueue(tpacpi_wq);
8108 }
8109
8110 static void fan_suspend(pm_message_t state)
8111 {
8112 int rc;
8113
8114 if (!fan_control_allowed)
8115 return;
8116
8117 /* Store fan status in cache */
8118 fan_control_resume_level = 0;
8119 rc = fan_get_status_safe(&fan_control_resume_level);
8120 if (rc < 0)
8121 pr_notice("failed to read fan level for later "
8122 "restore during resume: %d\n", rc);
8123
8124 /* if it is undefined, don't attempt to restore it.
8125 * KEEP THIS LAST */
8126 if (tp_features.fan_ctrl_status_undef)
8127 fan_control_resume_level = 0;
8128 }
8129
8130 static void fan_resume(void)
8131 {
8132 u8 current_level = 7;
8133 bool do_set = false;
8134 int rc;
8135
8136 /* DSDT *always* updates status on resume */
8137 tp_features.fan_ctrl_status_undef = 0;
8138
8139 if (!fan_control_allowed ||
8140 !fan_control_resume_level ||
8141 (fan_get_status_safe(&current_level) < 0))
8142 return;
8143
8144 switch (fan_control_access_mode) {
8145 case TPACPI_FAN_WR_ACPI_SFAN:
8146 /* never decrease fan level */
8147 do_set = (fan_control_resume_level > current_level);
8148 break;
8149 case TPACPI_FAN_WR_ACPI_FANS:
8150 case TPACPI_FAN_WR_TPEC:
8151 /* never decrease fan level, scale is:
8152 * TP_EC_FAN_FULLSPEED > 7 >= TP_EC_FAN_AUTO
8153 *
8154 * We expect the firmware to set either 7 or AUTO, but we
8155 * handle FULLSPEED out of paranoia.
8156 *
8157 * So, we can safely only restore FULLSPEED or 7, anything
8158 * else could slow the fan. Restoring AUTO is useless, at
8159 * best that's exactly what the DSDT already set (it is the
8160 * slower it uses).
8161 *
8162 * Always keep in mind that the DSDT *will* have set the
8163 * fans to what the vendor supposes is the best level. We
8164 * muck with it only to speed the fan up.
8165 */
8166 if (fan_control_resume_level != 7 &&
8167 !(fan_control_resume_level & TP_EC_FAN_FULLSPEED))
8168 return;
8169 else
8170 do_set = !(current_level & TP_EC_FAN_FULLSPEED) &&
8171 (current_level != fan_control_resume_level);
8172 break;
8173 default:
8174 return;
8175 }
8176 if (do_set) {
8177 pr_notice("restoring fan level to 0x%02x\n",
8178 fan_control_resume_level);
8179 rc = fan_set_level_safe(fan_control_resume_level);
8180 if (rc < 0)
8181 pr_notice("failed to restore fan level: %d\n", rc);
8182 }
8183 }
8184
8185 static int fan_read(struct seq_file *m)
8186 {
8187 int rc;
8188 u8 status;
8189 unsigned int speed = 0;
8190
8191 switch (fan_status_access_mode) {
8192 case TPACPI_FAN_RD_ACPI_GFAN:
8193 /* 570, 600e/x, 770e, 770x */
8194 rc = fan_get_status_safe(&status);
8195 if (rc < 0)
8196 return rc;
8197
8198 seq_printf(m, "status:\t\t%s\n"
8199 "level:\t\t%d\n",
8200 (status != 0) ? "enabled" : "disabled", status);
8201 break;
8202
8203 case TPACPI_FAN_RD_TPEC:
8204 /* all except 570, 600e/x, 770e, 770x */
8205 rc = fan_get_status_safe(&status);
8206 if (rc < 0)
8207 return rc;
8208
8209 seq_printf(m, "status:\t\t%s\n",
8210 (status != 0) ? "enabled" : "disabled");
8211
8212 rc = fan_get_speed(&speed);
8213 if (rc < 0)
8214 return rc;
8215
8216 seq_printf(m, "speed:\t\t%d\n", speed);
8217
8218 if (status & TP_EC_FAN_FULLSPEED)
8219 /* Disengaged mode takes precedence */
8220 seq_printf(m, "level:\t\tdisengaged\n");
8221 else if (status & TP_EC_FAN_AUTO)
8222 seq_printf(m, "level:\t\tauto\n");
8223 else
8224 seq_printf(m, "level:\t\t%d\n", status);
8225 break;
8226
8227 case TPACPI_FAN_NONE:
8228 default:
8229 seq_printf(m, "status:\t\tnot supported\n");
8230 }
8231
8232 if (fan_control_commands & TPACPI_FAN_CMD_LEVEL) {
8233 seq_printf(m, "commands:\tlevel <level>");
8234
8235 switch (fan_control_access_mode) {
8236 case TPACPI_FAN_WR_ACPI_SFAN:
8237 seq_printf(m, " (<level> is 0-7)\n");
8238 break;
8239
8240 default:
8241 seq_printf(m, " (<level> is 0-7, "
8242 "auto, disengaged, full-speed)\n");
8243 break;
8244 }
8245 }
8246
8247 if (fan_control_commands & TPACPI_FAN_CMD_ENABLE)
8248 seq_printf(m, "commands:\tenable, disable\n"
8249 "commands:\twatchdog <timeout> (<timeout> "
8250 "is 0 (off), 1-120 (seconds))\n");
8251
8252 if (fan_control_commands & TPACPI_FAN_CMD_SPEED)
8253 seq_printf(m, "commands:\tspeed <speed>"
8254 " (<speed> is 0-65535)\n");
8255
8256 return 0;
8257 }
8258
8259 static int fan_write_cmd_level(const char *cmd, int *rc)
8260 {
8261 int level;
8262
8263 if (strlencmp(cmd, "level auto") == 0)
8264 level = TP_EC_FAN_AUTO;
8265 else if ((strlencmp(cmd, "level disengaged") == 0) |
8266 (strlencmp(cmd, "level full-speed") == 0))
8267 level = TP_EC_FAN_FULLSPEED;
8268 else if (sscanf(cmd, "level %d", &level) != 1)
8269 return 0;
8270
8271 *rc = fan_set_level_safe(level);
8272 if (*rc == -ENXIO)
8273 pr_err("level command accepted for unsupported access mode %d\n",
8274 fan_control_access_mode);
8275 else if (!*rc)
8276 tpacpi_disclose_usertask("procfs fan",
8277 "set level to %d\n", level);
8278
8279 return 1;
8280 }
8281
8282 static int fan_write_cmd_enable(const char *cmd, int *rc)
8283 {
8284 if (strlencmp(cmd, "enable") != 0)
8285 return 0;
8286
8287 *rc = fan_set_enable();
8288 if (*rc == -ENXIO)
8289 pr_err("enable command accepted for unsupported access mode %d\n",
8290 fan_control_access_mode);
8291 else if (!*rc)
8292 tpacpi_disclose_usertask("procfs fan", "enable\n");
8293
8294 return 1;
8295 }
8296
8297 static int fan_write_cmd_disable(const char *cmd, int *rc)
8298 {
8299 if (strlencmp(cmd, "disable") != 0)
8300 return 0;
8301
8302 *rc = fan_set_disable();
8303 if (*rc == -ENXIO)
8304 pr_err("disable command accepted for unsupported access mode %d\n",
8305 fan_control_access_mode);
8306 else if (!*rc)
8307 tpacpi_disclose_usertask("procfs fan", "disable\n");
8308
8309 return 1;
8310 }
8311
8312 static int fan_write_cmd_speed(const char *cmd, int *rc)
8313 {
8314 int speed;
8315
8316 /* TODO:
8317 * Support speed <low> <medium> <high> ? */
8318
8319 if (sscanf(cmd, "speed %d", &speed) != 1)
8320 return 0;
8321
8322 *rc = fan_set_speed(speed);
8323 if (*rc == -ENXIO)
8324 pr_err("speed command accepted for unsupported access mode %d\n",
8325 fan_control_access_mode);
8326 else if (!*rc)
8327 tpacpi_disclose_usertask("procfs fan",
8328 "set speed to %d\n", speed);
8329
8330 return 1;
8331 }
8332
8333 static int fan_write_cmd_watchdog(const char *cmd, int *rc)
8334 {
8335 int interval;
8336
8337 if (sscanf(cmd, "watchdog %d", &interval) != 1)
8338 return 0;
8339
8340 if (interval < 0 || interval > 120)
8341 *rc = -EINVAL;
8342 else {
8343 fan_watchdog_maxinterval = interval;
8344 tpacpi_disclose_usertask("procfs fan",
8345 "set watchdog timer to %d\n",
8346 interval);
8347 }
8348
8349 return 1;
8350 }
8351
8352 static int fan_write(char *buf)
8353 {
8354 char *cmd;
8355 int rc = 0;
8356
8357 while (!rc && (cmd = next_cmd(&buf))) {
8358 if (!((fan_control_commands & TPACPI_FAN_CMD_LEVEL) &&
8359 fan_write_cmd_level(cmd, &rc)) &&
8360 !((fan_control_commands & TPACPI_FAN_CMD_ENABLE) &&
8361 (fan_write_cmd_enable(cmd, &rc) ||
8362 fan_write_cmd_disable(cmd, &rc) ||
8363 fan_write_cmd_watchdog(cmd, &rc))) &&
8364 !((fan_control_commands & TPACPI_FAN_CMD_SPEED) &&
8365 fan_write_cmd_speed(cmd, &rc))
8366 )
8367 rc = -EINVAL;
8368 else if (!rc)
8369 fan_watchdog_reset();
8370 }
8371
8372 return rc;
8373 }
8374
8375 static struct ibm_struct fan_driver_data = {
8376 .name = "fan",
8377 .read = fan_read,
8378 .write = fan_write,
8379 .exit = fan_exit,
8380 .suspend = fan_suspend,
8381 .resume = fan_resume,
8382 };
8383
8384 /****************************************************************************
8385 ****************************************************************************
8386 *
8387 * Infrastructure
8388 *
8389 ****************************************************************************
8390 ****************************************************************************/
8391
8392 /*
8393 * HKEY event callout for other subdrivers go here
8394 * (yes, it is ugly, but it is quick, safe, and gets the job done
8395 */
8396 static void tpacpi_driver_event(const unsigned int hkey_event)
8397 {
8398 if (ibm_backlight_device) {
8399 switch (hkey_event) {
8400 case TP_HKEY_EV_BRGHT_UP:
8401 case TP_HKEY_EV_BRGHT_DOWN:
8402 tpacpi_brightness_notify_change();
8403 }
8404 }
8405 if (alsa_card) {
8406 switch (hkey_event) {
8407 case TP_HKEY_EV_VOL_UP:
8408 case TP_HKEY_EV_VOL_DOWN:
8409 case TP_HKEY_EV_VOL_MUTE:
8410 volume_alsa_notify_change();
8411 }
8412 }
8413 }
8414
8415 static void hotkey_driver_event(const unsigned int scancode)
8416 {
8417 tpacpi_driver_event(TP_HKEY_EV_HOTKEY_BASE + scancode);
8418 }
8419
8420 /* sysfs name ---------------------------------------------------------- */
8421 static ssize_t thinkpad_acpi_pdev_name_show(struct device *dev,
8422 struct device_attribute *attr,
8423 char *buf)
8424 {
8425 return snprintf(buf, PAGE_SIZE, "%s\n", TPACPI_NAME);
8426 }
8427
8428 static struct device_attribute dev_attr_thinkpad_acpi_pdev_name =
8429 __ATTR(name, S_IRUGO, thinkpad_acpi_pdev_name_show, NULL);
8430
8431 /* --------------------------------------------------------------------- */
8432
8433 /* /proc support */
8434 static struct proc_dir_entry *proc_dir;
8435
8436 /*
8437 * Module and infrastructure proble, init and exit handling
8438 */
8439
8440 static int force_load;
8441
8442 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
8443 static const char * __init str_supported(int is_supported)
8444 {
8445 static char text_unsupported[] __initdata = "not supported";
8446
8447 return (is_supported)? &text_unsupported[4] : &text_unsupported[0];
8448 }
8449 #endif /* CONFIG_THINKPAD_ACPI_DEBUG */
8450
8451 static void ibm_exit(struct ibm_struct *ibm)
8452 {
8453 dbg_printk(TPACPI_DBG_EXIT, "removing %s\n", ibm->name);
8454
8455 list_del_init(&ibm->all_drivers);
8456
8457 if (ibm->flags.acpi_notify_installed) {
8458 dbg_printk(TPACPI_DBG_EXIT,
8459 "%s: acpi_remove_notify_handler\n", ibm->name);
8460 BUG_ON(!ibm->acpi);
8461 acpi_remove_notify_handler(*ibm->acpi->handle,
8462 ibm->acpi->type,
8463 dispatch_acpi_notify);
8464 ibm->flags.acpi_notify_installed = 0;
8465 }
8466
8467 if (ibm->flags.proc_created) {
8468 dbg_printk(TPACPI_DBG_EXIT,
8469 "%s: remove_proc_entry\n", ibm->name);
8470 remove_proc_entry(ibm->name, proc_dir);
8471 ibm->flags.proc_created = 0;
8472 }
8473
8474 if (ibm->flags.acpi_driver_registered) {
8475 dbg_printk(TPACPI_DBG_EXIT,
8476 "%s: acpi_bus_unregister_driver\n", ibm->name);
8477 BUG_ON(!ibm->acpi);
8478 acpi_bus_unregister_driver(ibm->acpi->driver);
8479 kfree(ibm->acpi->driver);
8480 ibm->acpi->driver = NULL;
8481 ibm->flags.acpi_driver_registered = 0;
8482 }
8483
8484 if (ibm->flags.init_called && ibm->exit) {
8485 ibm->exit();
8486 ibm->flags.init_called = 0;
8487 }
8488
8489 dbg_printk(TPACPI_DBG_INIT, "finished removing %s\n", ibm->name);
8490 }
8491
8492 static int __init ibm_init(struct ibm_init_struct *iibm)
8493 {
8494 int ret;
8495 struct ibm_struct *ibm = iibm->data;
8496 struct proc_dir_entry *entry;
8497
8498 BUG_ON(ibm == NULL);
8499
8500 INIT_LIST_HEAD(&ibm->all_drivers);
8501
8502 if (ibm->flags.experimental && !experimental)
8503 return 0;
8504
8505 dbg_printk(TPACPI_DBG_INIT,
8506 "probing for %s\n", ibm->name);
8507
8508 if (iibm->init) {
8509 ret = iibm->init(iibm);
8510 if (ret > 0)
8511 return 0; /* probe failed */
8512 if (ret)
8513 return ret;
8514
8515 ibm->flags.init_called = 1;
8516 }
8517
8518 if (ibm->acpi) {
8519 if (ibm->acpi->hid) {
8520 ret = register_tpacpi_subdriver(ibm);
8521 if (ret)
8522 goto err_out;
8523 }
8524
8525 if (ibm->acpi->notify) {
8526 ret = setup_acpi_notify(ibm);
8527 if (ret == -ENODEV) {
8528 pr_notice("disabling subdriver %s\n",
8529 ibm->name);
8530 ret = 0;
8531 goto err_out;
8532 }
8533 if (ret < 0)
8534 goto err_out;
8535 }
8536 }
8537
8538 dbg_printk(TPACPI_DBG_INIT,
8539 "%s installed\n", ibm->name);
8540
8541 if (ibm->read) {
8542 mode_t mode = iibm->base_procfs_mode;
8543
8544 if (!mode)
8545 mode = S_IRUGO;
8546 if (ibm->write)
8547 mode |= S_IWUSR;
8548 entry = proc_create_data(ibm->name, mode, proc_dir,
8549 &dispatch_proc_fops, ibm);
8550 if (!entry) {
8551 pr_err("unable to create proc entry %s\n", ibm->name);
8552 ret = -ENODEV;
8553 goto err_out;
8554 }
8555 ibm->flags.proc_created = 1;
8556 }
8557
8558 list_add_tail(&ibm->all_drivers, &tpacpi_all_drivers);
8559
8560 return 0;
8561
8562 err_out:
8563 dbg_printk(TPACPI_DBG_INIT,
8564 "%s: at error exit path with result %d\n",
8565 ibm->name, ret);
8566
8567 ibm_exit(ibm);
8568 return (ret < 0)? ret : 0;
8569 }
8570
8571 /* Probing */
8572
8573 static bool __pure __init tpacpi_is_fw_digit(const char c)
8574 {
8575 return (c >= '0' && c <= '9') || (c >= 'A' && c <= 'Z');
8576 }
8577
8578 /* Most models: xxyTkkWW (#.##c); Ancient 570/600 and -SL lacks (#.##c) */
8579 static bool __pure __init tpacpi_is_valid_fw_id(const char* const s,
8580 const char t)
8581 {
8582 return s && strlen(s) >= 8 &&
8583 tpacpi_is_fw_digit(s[0]) &&
8584 tpacpi_is_fw_digit(s[1]) &&
8585 s[2] == t && s[3] == 'T' &&
8586 tpacpi_is_fw_digit(s[4]) &&
8587 tpacpi_is_fw_digit(s[5]);
8588 }
8589
8590 /* returns 0 - probe ok, or < 0 - probe error.
8591 * Probe ok doesn't mean thinkpad found.
8592 * On error, kfree() cleanup on tp->* is not performed, caller must do it */
8593 static int __must_check __init get_thinkpad_model_data(
8594 struct thinkpad_id_data *tp)
8595 {
8596 const struct dmi_device *dev = NULL;
8597 char ec_fw_string[18];
8598 char const *s;
8599
8600 if (!tp)
8601 return -EINVAL;
8602
8603 memset(tp, 0, sizeof(*tp));
8604
8605 if (dmi_name_in_vendors("IBM"))
8606 tp->vendor = PCI_VENDOR_ID_IBM;
8607 else if (dmi_name_in_vendors("LENOVO"))
8608 tp->vendor = PCI_VENDOR_ID_LENOVO;
8609 else
8610 return 0;
8611
8612 s = dmi_get_system_info(DMI_BIOS_VERSION);
8613 tp->bios_version_str = kstrdup(s, GFP_KERNEL);
8614 if (s && !tp->bios_version_str)
8615 return -ENOMEM;
8616
8617 /* Really ancient ThinkPad 240X will fail this, which is fine */
8618 if (!tpacpi_is_valid_fw_id(tp->bios_version_str, 'E'))
8619 return 0;
8620
8621 tp->bios_model = tp->bios_version_str[0]
8622 | (tp->bios_version_str[1] << 8);
8623 tp->bios_release = (tp->bios_version_str[4] << 8)
8624 | tp->bios_version_str[5];
8625
8626 /*
8627 * ThinkPad T23 or newer, A31 or newer, R50e or newer,
8628 * X32 or newer, all Z series; Some models must have an
8629 * up-to-date BIOS or they will not be detected.
8630 *
8631 * See http://thinkwiki.org/wiki/List_of_DMI_IDs
8632 */
8633 while ((dev = dmi_find_device(DMI_DEV_TYPE_OEM_STRING, NULL, dev))) {
8634 if (sscanf(dev->name,
8635 "IBM ThinkPad Embedded Controller -[%17c",
8636 ec_fw_string) == 1) {
8637 ec_fw_string[sizeof(ec_fw_string) - 1] = 0;
8638 ec_fw_string[strcspn(ec_fw_string, " ]")] = 0;
8639
8640 tp->ec_version_str = kstrdup(ec_fw_string, GFP_KERNEL);
8641 if (!tp->ec_version_str)
8642 return -ENOMEM;
8643
8644 if (tpacpi_is_valid_fw_id(ec_fw_string, 'H')) {
8645 tp->ec_model = ec_fw_string[0]
8646 | (ec_fw_string[1] << 8);
8647 tp->ec_release = (ec_fw_string[4] << 8)
8648 | ec_fw_string[5];
8649 } else {
8650 pr_notice("ThinkPad firmware release %s "
8651 "doesn't match the known patterns\n",
8652 ec_fw_string);
8653 pr_notice("please report this to %s\n",
8654 TPACPI_MAIL);
8655 }
8656 break;
8657 }
8658 }
8659
8660 s = dmi_get_system_info(DMI_PRODUCT_VERSION);
8661 if (s && !strnicmp(s, "ThinkPad", 8)) {
8662 tp->model_str = kstrdup(s, GFP_KERNEL);
8663 if (!tp->model_str)
8664 return -ENOMEM;
8665 }
8666
8667 s = dmi_get_system_info(DMI_PRODUCT_NAME);
8668 tp->nummodel_str = kstrdup(s, GFP_KERNEL);
8669 if (s && !tp->nummodel_str)
8670 return -ENOMEM;
8671
8672 return 0;
8673 }
8674
8675 static int __init probe_for_thinkpad(void)
8676 {
8677 int is_thinkpad;
8678
8679 if (acpi_disabled)
8680 return -ENODEV;
8681
8682 /* It would be dangerous to run the driver in this case */
8683 if (!tpacpi_is_ibm() && !tpacpi_is_lenovo())
8684 return -ENODEV;
8685
8686 /*
8687 * Non-ancient models have better DMI tagging, but very old models
8688 * don't. tpacpi_is_fw_known() is a cheat to help in that case.
8689 */
8690 is_thinkpad = (thinkpad_id.model_str != NULL) ||
8691 (thinkpad_id.ec_model != 0) ||
8692 tpacpi_is_fw_known();
8693
8694 /* The EC handler is required */
8695 tpacpi_acpi_handle_locate("ec", TPACPI_ACPI_EC_HID, &ec_handle);
8696 if (!ec_handle) {
8697 if (is_thinkpad)
8698 pr_err("Not yet supported ThinkPad detected!\n");
8699 return -ENODEV;
8700 }
8701
8702 if (!is_thinkpad && !force_load)
8703 return -ENODEV;
8704
8705 return 0;
8706 }
8707
8708 static void __init thinkpad_acpi_init_banner(void)
8709 {
8710 pr_info("%s v%s\n", TPACPI_DESC, TPACPI_VERSION);
8711 pr_info("%s\n", TPACPI_URL);
8712
8713 pr_info("ThinkPad BIOS %s, EC %s\n",
8714 (thinkpad_id.bios_version_str) ?
8715 thinkpad_id.bios_version_str : "unknown",
8716 (thinkpad_id.ec_version_str) ?
8717 thinkpad_id.ec_version_str : "unknown");
8718
8719 BUG_ON(!thinkpad_id.vendor);
8720
8721 if (thinkpad_id.model_str)
8722 pr_info("%s %s, model %s\n",
8723 (thinkpad_id.vendor == PCI_VENDOR_ID_IBM) ?
8724 "IBM" : ((thinkpad_id.vendor ==
8725 PCI_VENDOR_ID_LENOVO) ?
8726 "Lenovo" : "Unknown vendor"),
8727 thinkpad_id.model_str,
8728 (thinkpad_id.nummodel_str) ?
8729 thinkpad_id.nummodel_str : "unknown");
8730 }
8731
8732 /* Module init, exit, parameters */
8733
8734 static struct ibm_init_struct ibms_init[] __initdata = {
8735 {
8736 .data = &thinkpad_acpi_driver_data,
8737 },
8738 {
8739 .init = hotkey_init,
8740 .data = &hotkey_driver_data,
8741 },
8742 {
8743 .init = bluetooth_init,
8744 .data = &bluetooth_driver_data,
8745 },
8746 {
8747 .init = wan_init,
8748 .data = &wan_driver_data,
8749 },
8750 {
8751 .init = uwb_init,
8752 .data = &uwb_driver_data,
8753 },
8754 #ifdef CONFIG_THINKPAD_ACPI_VIDEO
8755 {
8756 .init = video_init,
8757 .base_procfs_mode = S_IRUSR,
8758 .data = &video_driver_data,
8759 },
8760 #endif
8761 {
8762 .init = light_init,
8763 .data = &light_driver_data,
8764 },
8765 {
8766 .init = cmos_init,
8767 .data = &cmos_driver_data,
8768 },
8769 {
8770 .init = led_init,
8771 .data = &led_driver_data,
8772 },
8773 {
8774 .init = beep_init,
8775 .data = &beep_driver_data,
8776 },
8777 {
8778 .init = thermal_init,
8779 .data = &thermal_driver_data,
8780 },
8781 {
8782 .init = brightness_init,
8783 .data = &brightness_driver_data,
8784 },
8785 {
8786 .init = volume_init,
8787 .data = &volume_driver_data,
8788 },
8789 {
8790 .init = fan_init,
8791 .data = &fan_driver_data,
8792 },
8793 };
8794
8795 static int __init set_ibm_param(const char *val, struct kernel_param *kp)
8796 {
8797 unsigned int i;
8798 struct ibm_struct *ibm;
8799
8800 if (!kp || !kp->name || !val)
8801 return -EINVAL;
8802
8803 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
8804 ibm = ibms_init[i].data;
8805 WARN_ON(ibm == NULL);
8806
8807 if (!ibm || !ibm->name)
8808 continue;
8809
8810 if (strcmp(ibm->name, kp->name) == 0 && ibm->write) {
8811 if (strlen(val) > sizeof(ibms_init[i].param) - 2)
8812 return -ENOSPC;
8813 strcpy(ibms_init[i].param, val);
8814 strcat(ibms_init[i].param, ",");
8815 return 0;
8816 }
8817 }
8818
8819 return -EINVAL;
8820 }
8821
8822 module_param(experimental, int, 0444);
8823 MODULE_PARM_DESC(experimental,
8824 "Enables experimental features when non-zero");
8825
8826 module_param_named(debug, dbg_level, uint, 0);
8827 MODULE_PARM_DESC(debug, "Sets debug level bit-mask");
8828
8829 module_param(force_load, bool, 0444);
8830 MODULE_PARM_DESC(force_load,
8831 "Attempts to load the driver even on a "
8832 "mis-identified ThinkPad when true");
8833
8834 module_param_named(fan_control, fan_control_allowed, bool, 0444);
8835 MODULE_PARM_DESC(fan_control,
8836 "Enables setting fan parameters features when true");
8837
8838 module_param_named(brightness_mode, brightness_mode, uint, 0444);
8839 MODULE_PARM_DESC(brightness_mode,
8840 "Selects brightness control strategy: "
8841 "0=auto, 1=EC, 2=UCMS, 3=EC+NVRAM");
8842
8843 module_param(brightness_enable, uint, 0444);
8844 MODULE_PARM_DESC(brightness_enable,
8845 "Enables backlight control when 1, disables when 0");
8846
8847 module_param(hotkey_report_mode, uint, 0444);
8848 MODULE_PARM_DESC(hotkey_report_mode,
8849 "used for backwards compatibility with userspace, "
8850 "see documentation");
8851
8852 #ifdef CONFIG_THINKPAD_ACPI_ALSA_SUPPORT
8853 module_param_named(volume_mode, volume_mode, uint, 0444);
8854 MODULE_PARM_DESC(volume_mode,
8855 "Selects volume control strategy: "
8856 "0=auto, 1=EC, 2=N/A, 3=EC+NVRAM");
8857
8858 module_param_named(volume_capabilities, volume_capabilities, uint, 0444);
8859 MODULE_PARM_DESC(volume_capabilities,
8860 "Selects the mixer capabilites: "
8861 "0=auto, 1=volume and mute, 2=mute only");
8862
8863 module_param_named(volume_control, volume_control_allowed, bool, 0444);
8864 MODULE_PARM_DESC(volume_control,
8865 "Enables software override for the console audio "
8866 "control when true");
8867
8868 /* ALSA module API parameters */
8869 module_param_named(index, alsa_index, int, 0444);
8870 MODULE_PARM_DESC(index, "ALSA index for the ACPI EC Mixer");
8871 module_param_named(id, alsa_id, charp, 0444);
8872 MODULE_PARM_DESC(id, "ALSA id for the ACPI EC Mixer");
8873 module_param_named(enable, alsa_enable, bool, 0444);
8874 MODULE_PARM_DESC(enable, "Enable the ALSA interface for the ACPI EC Mixer");
8875 #endif /* CONFIG_THINKPAD_ACPI_ALSA_SUPPORT */
8876
8877 #define TPACPI_PARAM(feature) \
8878 module_param_call(feature, set_ibm_param, NULL, NULL, 0); \
8879 MODULE_PARM_DESC(feature, "Simulates thinkpad-acpi procfs command " \
8880 "at module load, see documentation")
8881
8882 TPACPI_PARAM(hotkey);
8883 TPACPI_PARAM(bluetooth);
8884 TPACPI_PARAM(video);
8885 TPACPI_PARAM(light);
8886 TPACPI_PARAM(cmos);
8887 TPACPI_PARAM(led);
8888 TPACPI_PARAM(beep);
8889 TPACPI_PARAM(brightness);
8890 TPACPI_PARAM(volume);
8891 TPACPI_PARAM(fan);
8892
8893 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
8894 module_param(dbg_wlswemul, uint, 0444);
8895 MODULE_PARM_DESC(dbg_wlswemul, "Enables WLSW emulation");
8896 module_param_named(wlsw_state, tpacpi_wlsw_emulstate, bool, 0);
8897 MODULE_PARM_DESC(wlsw_state,
8898 "Initial state of the emulated WLSW switch");
8899
8900 module_param(dbg_bluetoothemul, uint, 0444);
8901 MODULE_PARM_DESC(dbg_bluetoothemul, "Enables bluetooth switch emulation");
8902 module_param_named(bluetooth_state, tpacpi_bluetooth_emulstate, bool, 0);
8903 MODULE_PARM_DESC(bluetooth_state,
8904 "Initial state of the emulated bluetooth switch");
8905
8906 module_param(dbg_wwanemul, uint, 0444);
8907 MODULE_PARM_DESC(dbg_wwanemul, "Enables WWAN switch emulation");
8908 module_param_named(wwan_state, tpacpi_wwan_emulstate, bool, 0);
8909 MODULE_PARM_DESC(wwan_state,
8910 "Initial state of the emulated WWAN switch");
8911
8912 module_param(dbg_uwbemul, uint, 0444);
8913 MODULE_PARM_DESC(dbg_uwbemul, "Enables UWB switch emulation");
8914 module_param_named(uwb_state, tpacpi_uwb_emulstate, bool, 0);
8915 MODULE_PARM_DESC(uwb_state,
8916 "Initial state of the emulated UWB switch");
8917 #endif
8918
8919 static void thinkpad_acpi_module_exit(void)
8920 {
8921 struct ibm_struct *ibm, *itmp;
8922
8923 tpacpi_lifecycle = TPACPI_LIFE_EXITING;
8924
8925 list_for_each_entry_safe_reverse(ibm, itmp,
8926 &tpacpi_all_drivers,
8927 all_drivers) {
8928 ibm_exit(ibm);
8929 }
8930
8931 dbg_printk(TPACPI_DBG_INIT, "finished subdriver exit path...\n");
8932
8933 if (tpacpi_inputdev) {
8934 if (tp_features.input_device_registered)
8935 input_unregister_device(tpacpi_inputdev);
8936 else
8937 input_free_device(tpacpi_inputdev);
8938 }
8939
8940 if (tpacpi_hwmon)
8941 hwmon_device_unregister(tpacpi_hwmon);
8942
8943 if (tp_features.sensors_pdev_attrs_registered)
8944 device_remove_file(&tpacpi_sensors_pdev->dev,
8945 &dev_attr_thinkpad_acpi_pdev_name);
8946 if (tpacpi_sensors_pdev)
8947 platform_device_unregister(tpacpi_sensors_pdev);
8948 if (tpacpi_pdev)
8949 platform_device_unregister(tpacpi_pdev);
8950
8951 if (tp_features.sensors_pdrv_attrs_registered)
8952 tpacpi_remove_driver_attributes(&tpacpi_hwmon_pdriver.driver);
8953 if (tp_features.platform_drv_attrs_registered)
8954 tpacpi_remove_driver_attributes(&tpacpi_pdriver.driver);
8955
8956 if (tp_features.sensors_pdrv_registered)
8957 platform_driver_unregister(&tpacpi_hwmon_pdriver);
8958
8959 if (tp_features.platform_drv_registered)
8960 platform_driver_unregister(&tpacpi_pdriver);
8961
8962 if (proc_dir)
8963 remove_proc_entry(TPACPI_PROC_DIR, acpi_root_dir);
8964
8965 if (tpacpi_wq)
8966 destroy_workqueue(tpacpi_wq);
8967
8968 kfree(thinkpad_id.bios_version_str);
8969 kfree(thinkpad_id.ec_version_str);
8970 kfree(thinkpad_id.model_str);
8971 }
8972
8973
8974 static int __init thinkpad_acpi_module_init(void)
8975 {
8976 int ret, i;
8977
8978 tpacpi_lifecycle = TPACPI_LIFE_INIT;
8979
8980 /* Parameter checking */
8981 if (hotkey_report_mode > 2)
8982 return -EINVAL;
8983
8984 /* Driver-level probe */
8985
8986 ret = get_thinkpad_model_data(&thinkpad_id);
8987 if (ret) {
8988 pr_err("unable to get DMI data: %d\n", ret);
8989 thinkpad_acpi_module_exit();
8990 return ret;
8991 }
8992 ret = probe_for_thinkpad();
8993 if (ret) {
8994 thinkpad_acpi_module_exit();
8995 return ret;
8996 }
8997
8998 /* Driver initialization */
8999
9000 thinkpad_acpi_init_banner();
9001 tpacpi_check_outdated_fw();
9002
9003 TPACPI_ACPIHANDLE_INIT(ecrd);
9004 TPACPI_ACPIHANDLE_INIT(ecwr);
9005
9006 tpacpi_wq = create_singlethread_workqueue(TPACPI_WORKQUEUE_NAME);
9007 if (!tpacpi_wq) {
9008 thinkpad_acpi_module_exit();
9009 return -ENOMEM;
9010 }
9011
9012 proc_dir = proc_mkdir(TPACPI_PROC_DIR, acpi_root_dir);
9013 if (!proc_dir) {
9014 pr_err("unable to create proc dir " TPACPI_PROC_DIR "\n");
9015 thinkpad_acpi_module_exit();
9016 return -ENODEV;
9017 }
9018
9019 ret = platform_driver_register(&tpacpi_pdriver);
9020 if (ret) {
9021 pr_err("unable to register main platform driver\n");
9022 thinkpad_acpi_module_exit();
9023 return ret;
9024 }
9025 tp_features.platform_drv_registered = 1;
9026
9027 ret = platform_driver_register(&tpacpi_hwmon_pdriver);
9028 if (ret) {
9029 pr_err("unable to register hwmon platform driver\n");
9030 thinkpad_acpi_module_exit();
9031 return ret;
9032 }
9033 tp_features.sensors_pdrv_registered = 1;
9034
9035 ret = tpacpi_create_driver_attributes(&tpacpi_pdriver.driver);
9036 if (!ret) {
9037 tp_features.platform_drv_attrs_registered = 1;
9038 ret = tpacpi_create_driver_attributes(
9039 &tpacpi_hwmon_pdriver.driver);
9040 }
9041 if (ret) {
9042 pr_err("unable to create sysfs driver attributes\n");
9043 thinkpad_acpi_module_exit();
9044 return ret;
9045 }
9046 tp_features.sensors_pdrv_attrs_registered = 1;
9047
9048
9049 /* Device initialization */
9050 tpacpi_pdev = platform_device_register_simple(TPACPI_DRVR_NAME, -1,
9051 NULL, 0);
9052 if (IS_ERR(tpacpi_pdev)) {
9053 ret = PTR_ERR(tpacpi_pdev);
9054 tpacpi_pdev = NULL;
9055 pr_err("unable to register platform device\n");
9056 thinkpad_acpi_module_exit();
9057 return ret;
9058 }
9059 tpacpi_sensors_pdev = platform_device_register_simple(
9060 TPACPI_HWMON_DRVR_NAME,
9061 -1, NULL, 0);
9062 if (IS_ERR(tpacpi_sensors_pdev)) {
9063 ret = PTR_ERR(tpacpi_sensors_pdev);
9064 tpacpi_sensors_pdev = NULL;
9065 pr_err("unable to register hwmon platform device\n");
9066 thinkpad_acpi_module_exit();
9067 return ret;
9068 }
9069 ret = device_create_file(&tpacpi_sensors_pdev->dev,
9070 &dev_attr_thinkpad_acpi_pdev_name);
9071 if (ret) {
9072 pr_err("unable to create sysfs hwmon device attributes\n");
9073 thinkpad_acpi_module_exit();
9074 return ret;
9075 }
9076 tp_features.sensors_pdev_attrs_registered = 1;
9077 tpacpi_hwmon = hwmon_device_register(&tpacpi_sensors_pdev->dev);
9078 if (IS_ERR(tpacpi_hwmon)) {
9079 ret = PTR_ERR(tpacpi_hwmon);
9080 tpacpi_hwmon = NULL;
9081 pr_err("unable to register hwmon device\n");
9082 thinkpad_acpi_module_exit();
9083 return ret;
9084 }
9085 mutex_init(&tpacpi_inputdev_send_mutex);
9086 tpacpi_inputdev = input_allocate_device();
9087 if (!tpacpi_inputdev) {
9088 pr_err("unable to allocate input device\n");
9089 thinkpad_acpi_module_exit();
9090 return -ENOMEM;
9091 } else {
9092 /* Prepare input device, but don't register */
9093 tpacpi_inputdev->name = "ThinkPad Extra Buttons";
9094 tpacpi_inputdev->phys = TPACPI_DRVR_NAME "/input0";
9095 tpacpi_inputdev->id.bustype = BUS_HOST;
9096 tpacpi_inputdev->id.vendor = thinkpad_id.vendor;
9097 tpacpi_inputdev->id.product = TPACPI_HKEY_INPUT_PRODUCT;
9098 tpacpi_inputdev->id.version = TPACPI_HKEY_INPUT_VERSION;
9099 tpacpi_inputdev->dev.parent = &tpacpi_pdev->dev;
9100 }
9101
9102 /* Init subdriver dependencies */
9103 tpacpi_detect_brightness_capabilities();
9104
9105 /* Init subdrivers */
9106 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
9107 ret = ibm_init(&ibms_init[i]);
9108 if (ret >= 0 && *ibms_init[i].param)
9109 ret = ibms_init[i].data->write(ibms_init[i].param);
9110 if (ret < 0) {
9111 thinkpad_acpi_module_exit();
9112 return ret;
9113 }
9114 }
9115
9116 tpacpi_lifecycle = TPACPI_LIFE_RUNNING;
9117
9118 ret = input_register_device(tpacpi_inputdev);
9119 if (ret < 0) {
9120 pr_err("unable to register input device\n");
9121 thinkpad_acpi_module_exit();
9122 return ret;
9123 } else {
9124 tp_features.input_device_registered = 1;
9125 }
9126
9127 return 0;
9128 }
9129
9130 MODULE_ALIAS(TPACPI_DRVR_SHORTNAME);
9131
9132 /*
9133 * This will autoload the driver in almost every ThinkPad
9134 * in widespread use.
9135 *
9136 * Only _VERY_ old models, like the 240, 240x and 570 lack
9137 * the HKEY event interface.
9138 */
9139 MODULE_DEVICE_TABLE(acpi, ibm_htk_device_ids);
9140
9141 /*
9142 * DMI matching for module autoloading
9143 *
9144 * See http://thinkwiki.org/wiki/List_of_DMI_IDs
9145 * See http://thinkwiki.org/wiki/BIOS_Upgrade_Downloads
9146 *
9147 * Only models listed in thinkwiki will be supported, so add yours
9148 * if it is not there yet.
9149 */
9150 #define IBM_BIOS_MODULE_ALIAS(__type) \
9151 MODULE_ALIAS("dmi:bvnIBM:bvr" __type "ET??WW*")
9152
9153 /* Ancient thinkpad BIOSes have to be identified by
9154 * BIOS type or model number, and there are far less
9155 * BIOS types than model numbers... */
9156 IBM_BIOS_MODULE_ALIAS("I[MU]"); /* 570, 570e */
9157
9158 MODULE_AUTHOR("Borislav Deianov <borislav@users.sf.net>");
9159 MODULE_AUTHOR("Henrique de Moraes Holschuh <hmh@hmh.eng.br>");
9160 MODULE_DESCRIPTION(TPACPI_DESC);
9161 MODULE_VERSION(TPACPI_VERSION);
9162 MODULE_LICENSE("GPL");
9163
9164 module_init(thinkpad_acpi_module_init);
9165 module_exit(thinkpad_acpi_module_exit);
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