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hwmon: (pmbus) Increase attribute name size
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / platform / x86 / thinkpad_acpi.c
blob26c5b117df22d5011c46c64f2f588f83dd7ed58c
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, must_reset;
2460 unsigned int poll_freq;
2461
2462 mutex_lock(&hotkey_thread_mutex);
2463
2464 if (tpacpi_lifecycle == TPACPI_LIFE_EXITING)
2465 goto exit;
2466
2467 set_freezable();
2468
2469 so = 0;
2470 si = 1;
2471 t = 0;
2472
2473 /* Initial state for compares */
2474 mutex_lock(&hotkey_thread_data_mutex);
2475 change_detector = hotkey_config_change;
2476 poll_mask = hotkey_source_mask;
2477 event_mask = hotkey_source_mask &
2478 (hotkey_driver_mask | hotkey_user_mask);
2479 poll_freq = hotkey_poll_freq;
2480 mutex_unlock(&hotkey_thread_data_mutex);
2481 hotkey_read_nvram(&s[so], poll_mask);
2482
2483 while (!kthread_should_stop()) {
2484 if (t == 0) {
2485 if (likely(poll_freq))
2486 t = 1000/poll_freq;
2487 else
2488 t = 100; /* should never happen... */
2489 }
2490 t = msleep_interruptible(t);
2491 if (unlikely(kthread_should_stop()))
2492 break;
2493 must_reset = try_to_freeze();
2494 if (t > 0 && !must_reset)
2495 continue;
2496
2497 mutex_lock(&hotkey_thread_data_mutex);
2498 if (must_reset || hotkey_config_change != change_detector) {
2499 /* forget old state on thaw or config change */
2500 si = so;
2501 t = 0;
2502 change_detector = hotkey_config_change;
2503 }
2504 poll_mask = hotkey_source_mask;
2505 event_mask = hotkey_source_mask &
2506 (hotkey_driver_mask | hotkey_user_mask);
2507 poll_freq = hotkey_poll_freq;
2508 mutex_unlock(&hotkey_thread_data_mutex);
2509
2510 if (likely(poll_mask)) {
2511 hotkey_read_nvram(&s[si], poll_mask);
2512 if (likely(si != so)) {
2513 hotkey_compare_and_issue_event(&s[so], &s[si],
2514 event_mask);
2515 }
2516 }
2517
2518 so = si;
2519 si ^= 1;
2520 }
2521
2522 exit:
2523 mutex_unlock(&hotkey_thread_mutex);
2524 return 0;
2525 }
2526
2527 /* call with hotkey_mutex held */
2528 static void hotkey_poll_stop_sync(void)
2529 {
2530 if (tpacpi_hotkey_task) {
2531 if (frozen(tpacpi_hotkey_task) ||
2532 freezing(tpacpi_hotkey_task))
2533 thaw_process(tpacpi_hotkey_task);
2534
2535 kthread_stop(tpacpi_hotkey_task);
2536 tpacpi_hotkey_task = NULL;
2537 mutex_lock(&hotkey_thread_mutex);
2538 /* at this point, the thread did exit */
2539 mutex_unlock(&hotkey_thread_mutex);
2540 }
2541 }
2542
2543 /* call with hotkey_mutex held */
2544 static void hotkey_poll_setup(const bool may_warn)
2545 {
2546 const u32 poll_driver_mask = hotkey_driver_mask & hotkey_source_mask;
2547 const u32 poll_user_mask = hotkey_user_mask & hotkey_source_mask;
2548
2549 if (hotkey_poll_freq > 0 &&
2550 (poll_driver_mask ||
2551 (poll_user_mask && tpacpi_inputdev->users > 0))) {
2552 if (!tpacpi_hotkey_task) {
2553 tpacpi_hotkey_task = kthread_run(hotkey_kthread,
2554 NULL, TPACPI_NVRAM_KTHREAD_NAME);
2555 if (IS_ERR(tpacpi_hotkey_task)) {
2556 tpacpi_hotkey_task = NULL;
2557 pr_err("could not create kernel thread "
2558 "for hotkey polling\n");
2559 }
2560 }
2561 } else {
2562 hotkey_poll_stop_sync();
2563 if (may_warn && (poll_driver_mask || poll_user_mask) &&
2564 hotkey_poll_freq == 0) {
2565 pr_notice("hot keys 0x%08x and/or events 0x%08x "
2566 "require polling, which is currently "
2567 "disabled\n",
2568 poll_user_mask, poll_driver_mask);
2569 }
2570 }
2571 }
2572
2573 static void hotkey_poll_setup_safe(const bool may_warn)
2574 {
2575 mutex_lock(&hotkey_mutex);
2576 hotkey_poll_setup(may_warn);
2577 mutex_unlock(&hotkey_mutex);
2578 }
2579
2580 /* call with hotkey_mutex held */
2581 static void hotkey_poll_set_freq(unsigned int freq)
2582 {
2583 if (!freq)
2584 hotkey_poll_stop_sync();
2585
2586 hotkey_poll_freq = freq;
2587 }
2588
2589 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2590
2591 static void hotkey_poll_setup(const bool __unused)
2592 {
2593 }
2594
2595 static void hotkey_poll_setup_safe(const bool __unused)
2596 {
2597 }
2598
2599 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2600
2601 static int hotkey_inputdev_open(struct input_dev *dev)
2602 {
2603 switch (tpacpi_lifecycle) {
2604 case TPACPI_LIFE_INIT:
2605 case TPACPI_LIFE_RUNNING:
2606 hotkey_poll_setup_safe(false);
2607 return 0;
2608 case TPACPI_LIFE_EXITING:
2609 return -EBUSY;
2610 }
2611
2612 /* Should only happen if tpacpi_lifecycle is corrupt */
2613 BUG();
2614 return -EBUSY;
2615 }
2616
2617 static void hotkey_inputdev_close(struct input_dev *dev)
2618 {
2619 /* disable hotkey polling when possible */
2620 if (tpacpi_lifecycle != TPACPI_LIFE_EXITING &&
2621 !(hotkey_source_mask & hotkey_driver_mask))
2622 hotkey_poll_setup_safe(false);
2623 }
2624
2625 /* sysfs hotkey enable ------------------------------------------------- */
2626 static ssize_t hotkey_enable_show(struct device *dev,
2627 struct device_attribute *attr,
2628 char *buf)
2629 {
2630 int res, status;
2631
2632 printk_deprecated_attribute("hotkey_enable",
2633 "Hotkey reporting is always enabled");
2634
2635 res = hotkey_status_get(&status);
2636 if (res)
2637 return res;
2638
2639 return snprintf(buf, PAGE_SIZE, "%d\n", status);
2640 }
2641
2642 static ssize_t hotkey_enable_store(struct device *dev,
2643 struct device_attribute *attr,
2644 const char *buf, size_t count)
2645 {
2646 unsigned long t;
2647
2648 printk_deprecated_attribute("hotkey_enable",
2649 "Hotkeys can be disabled through hotkey_mask");
2650
2651 if (parse_strtoul(buf, 1, &t))
2652 return -EINVAL;
2653
2654 if (t == 0)
2655 return -EPERM;
2656
2657 return count;
2658 }
2659
2660 static struct device_attribute dev_attr_hotkey_enable =
2661 __ATTR(hotkey_enable, S_IWUSR | S_IRUGO,
2662 hotkey_enable_show, hotkey_enable_store);
2663
2664 /* sysfs hotkey mask --------------------------------------------------- */
2665 static ssize_t hotkey_mask_show(struct device *dev,
2666 struct device_attribute *attr,
2667 char *buf)
2668 {
2669 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_user_mask);
2670 }
2671
2672 static ssize_t hotkey_mask_store(struct device *dev,
2673 struct device_attribute *attr,
2674 const char *buf, size_t count)
2675 {
2676 unsigned long t;
2677 int res;
2678
2679 if (parse_strtoul(buf, 0xffffffffUL, &t))
2680 return -EINVAL;
2681
2682 if (mutex_lock_killable(&hotkey_mutex))
2683 return -ERESTARTSYS;
2684
2685 res = hotkey_user_mask_set(t);
2686
2687 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2688 hotkey_poll_setup(true);
2689 #endif
2690
2691 mutex_unlock(&hotkey_mutex);
2692
2693 tpacpi_disclose_usertask("hotkey_mask", "set to 0x%08lx\n", t);
2694
2695 return (res) ? res : count;
2696 }
2697
2698 static struct device_attribute dev_attr_hotkey_mask =
2699 __ATTR(hotkey_mask, S_IWUSR | S_IRUGO,
2700 hotkey_mask_show, hotkey_mask_store);
2701
2702 /* sysfs hotkey bios_enabled ------------------------------------------- */
2703 static ssize_t hotkey_bios_enabled_show(struct device *dev,
2704 struct device_attribute *attr,
2705 char *buf)
2706 {
2707 return sprintf(buf, "0\n");
2708 }
2709
2710 static struct device_attribute dev_attr_hotkey_bios_enabled =
2711 __ATTR(hotkey_bios_enabled, S_IRUGO, hotkey_bios_enabled_show, NULL);
2712
2713 /* sysfs hotkey bios_mask ---------------------------------------------- */
2714 static ssize_t hotkey_bios_mask_show(struct device *dev,
2715 struct device_attribute *attr,
2716 char *buf)
2717 {
2718 printk_deprecated_attribute("hotkey_bios_mask",
2719 "This attribute is useless.");
2720 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_orig_mask);
2721 }
2722
2723 static struct device_attribute dev_attr_hotkey_bios_mask =
2724 __ATTR(hotkey_bios_mask, S_IRUGO, hotkey_bios_mask_show, NULL);
2725
2726 /* sysfs hotkey all_mask ----------------------------------------------- */
2727 static ssize_t hotkey_all_mask_show(struct device *dev,
2728 struct device_attribute *attr,
2729 char *buf)
2730 {
2731 return snprintf(buf, PAGE_SIZE, "0x%08x\n",
2732 hotkey_all_mask | hotkey_source_mask);
2733 }
2734
2735 static struct device_attribute dev_attr_hotkey_all_mask =
2736 __ATTR(hotkey_all_mask, S_IRUGO, hotkey_all_mask_show, NULL);
2737
2738 /* sysfs hotkey recommended_mask --------------------------------------- */
2739 static ssize_t hotkey_recommended_mask_show(struct device *dev,
2740 struct device_attribute *attr,
2741 char *buf)
2742 {
2743 return snprintf(buf, PAGE_SIZE, "0x%08x\n",
2744 (hotkey_all_mask | hotkey_source_mask)
2745 & ~hotkey_reserved_mask);
2746 }
2747
2748 static struct device_attribute dev_attr_hotkey_recommended_mask =
2749 __ATTR(hotkey_recommended_mask, S_IRUGO,
2750 hotkey_recommended_mask_show, NULL);
2751
2752 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2753
2754 /* sysfs hotkey hotkey_source_mask ------------------------------------- */
2755 static ssize_t hotkey_source_mask_show(struct device *dev,
2756 struct device_attribute *attr,
2757 char *buf)
2758 {
2759 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_source_mask);
2760 }
2761
2762 static ssize_t hotkey_source_mask_store(struct device *dev,
2763 struct device_attribute *attr,
2764 const char *buf, size_t count)
2765 {
2766 unsigned long t;
2767 u32 r_ev;
2768 int rc;
2769
2770 if (parse_strtoul(buf, 0xffffffffUL, &t) ||
2771 ((t & ~TPACPI_HKEY_NVRAM_KNOWN_MASK) != 0))
2772 return -EINVAL;
2773
2774 if (mutex_lock_killable(&hotkey_mutex))
2775 return -ERESTARTSYS;
2776
2777 HOTKEY_CONFIG_CRITICAL_START
2778 hotkey_source_mask = t;
2779 HOTKEY_CONFIG_CRITICAL_END
2780
2781 rc = hotkey_mask_set((hotkey_user_mask | hotkey_driver_mask) &
2782 ~hotkey_source_mask);
2783 hotkey_poll_setup(true);
2784
2785 /* check if events needed by the driver got disabled */
2786 r_ev = hotkey_driver_mask & ~(hotkey_acpi_mask & hotkey_all_mask)
2787 & ~hotkey_source_mask & TPACPI_HKEY_NVRAM_KNOWN_MASK;
2788
2789 mutex_unlock(&hotkey_mutex);
2790
2791 if (rc < 0)
2792 pr_err("hotkey_source_mask: "
2793 "failed to update the firmware event mask!\n");
2794
2795 if (r_ev)
2796 pr_notice("hotkey_source_mask: "
2797 "some important events were disabled: 0x%04x\n",
2798 r_ev);
2799
2800 tpacpi_disclose_usertask("hotkey_source_mask", "set to 0x%08lx\n", t);
2801
2802 return (rc < 0) ? rc : count;
2803 }
2804
2805 static struct device_attribute dev_attr_hotkey_source_mask =
2806 __ATTR(hotkey_source_mask, S_IWUSR | S_IRUGO,
2807 hotkey_source_mask_show, hotkey_source_mask_store);
2808
2809 /* sysfs hotkey hotkey_poll_freq --------------------------------------- */
2810 static ssize_t hotkey_poll_freq_show(struct device *dev,
2811 struct device_attribute *attr,
2812 char *buf)
2813 {
2814 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_poll_freq);
2815 }
2816
2817 static ssize_t hotkey_poll_freq_store(struct device *dev,
2818 struct device_attribute *attr,
2819 const char *buf, size_t count)
2820 {
2821 unsigned long t;
2822
2823 if (parse_strtoul(buf, 25, &t))
2824 return -EINVAL;
2825
2826 if (mutex_lock_killable(&hotkey_mutex))
2827 return -ERESTARTSYS;
2828
2829 hotkey_poll_set_freq(t);
2830 hotkey_poll_setup(true);
2831
2832 mutex_unlock(&hotkey_mutex);
2833
2834 tpacpi_disclose_usertask("hotkey_poll_freq", "set to %lu\n", t);
2835
2836 return count;
2837 }
2838
2839 static struct device_attribute dev_attr_hotkey_poll_freq =
2840 __ATTR(hotkey_poll_freq, S_IWUSR | S_IRUGO,
2841 hotkey_poll_freq_show, hotkey_poll_freq_store);
2842
2843 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2844
2845 /* sysfs hotkey radio_sw (pollable) ------------------------------------ */
2846 static ssize_t hotkey_radio_sw_show(struct device *dev,
2847 struct device_attribute *attr,
2848 char *buf)
2849 {
2850 int res;
2851 res = hotkey_get_wlsw();
2852 if (res < 0)
2853 return res;
2854
2855 /* Opportunistic update */
2856 tpacpi_rfk_update_hwblock_state((res == TPACPI_RFK_RADIO_OFF));
2857
2858 return snprintf(buf, PAGE_SIZE, "%d\n",
2859 (res == TPACPI_RFK_RADIO_OFF) ? 0 : 1);
2860 }
2861
2862 static struct device_attribute dev_attr_hotkey_radio_sw =
2863 __ATTR(hotkey_radio_sw, S_IRUGO, hotkey_radio_sw_show, NULL);
2864
2865 static void hotkey_radio_sw_notify_change(void)
2866 {
2867 if (tp_features.hotkey_wlsw)
2868 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2869 "hotkey_radio_sw");
2870 }
2871
2872 /* sysfs hotkey tablet mode (pollable) --------------------------------- */
2873 static ssize_t hotkey_tablet_mode_show(struct device *dev,
2874 struct device_attribute *attr,
2875 char *buf)
2876 {
2877 int res, s;
2878 res = hotkey_get_tablet_mode(&s);
2879 if (res < 0)
2880 return res;
2881
2882 return snprintf(buf, PAGE_SIZE, "%d\n", !!s);
2883 }
2884
2885 static struct device_attribute dev_attr_hotkey_tablet_mode =
2886 __ATTR(hotkey_tablet_mode, S_IRUGO, hotkey_tablet_mode_show, NULL);
2887
2888 static void hotkey_tablet_mode_notify_change(void)
2889 {
2890 if (tp_features.hotkey_tablet)
2891 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2892 "hotkey_tablet_mode");
2893 }
2894
2895 /* sysfs hotkey report_mode -------------------------------------------- */
2896 static ssize_t hotkey_report_mode_show(struct device *dev,
2897 struct device_attribute *attr,
2898 char *buf)
2899 {
2900 return snprintf(buf, PAGE_SIZE, "%d\n",
2901 (hotkey_report_mode != 0) ? hotkey_report_mode : 1);
2902 }
2903
2904 static struct device_attribute dev_attr_hotkey_report_mode =
2905 __ATTR(hotkey_report_mode, S_IRUGO, hotkey_report_mode_show, NULL);
2906
2907 /* sysfs wakeup reason (pollable) -------------------------------------- */
2908 static ssize_t hotkey_wakeup_reason_show(struct device *dev,
2909 struct device_attribute *attr,
2910 char *buf)
2911 {
2912 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_wakeup_reason);
2913 }
2914
2915 static struct device_attribute dev_attr_hotkey_wakeup_reason =
2916 __ATTR(wakeup_reason, S_IRUGO, hotkey_wakeup_reason_show, NULL);
2917
2918 static void hotkey_wakeup_reason_notify_change(void)
2919 {
2920 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2921 "wakeup_reason");
2922 }
2923
2924 /* sysfs wakeup hotunplug_complete (pollable) -------------------------- */
2925 static ssize_t hotkey_wakeup_hotunplug_complete_show(struct device *dev,
2926 struct device_attribute *attr,
2927 char *buf)
2928 {
2929 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_autosleep_ack);
2930 }
2931
2932 static struct device_attribute dev_attr_hotkey_wakeup_hotunplug_complete =
2933 __ATTR(wakeup_hotunplug_complete, S_IRUGO,
2934 hotkey_wakeup_hotunplug_complete_show, NULL);
2935
2936 static void hotkey_wakeup_hotunplug_complete_notify_change(void)
2937 {
2938 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2939 "wakeup_hotunplug_complete");
2940 }
2941
2942 /* --------------------------------------------------------------------- */
2943
2944 static struct attribute *hotkey_attributes[] __initdata = {
2945 &dev_attr_hotkey_enable.attr,
2946 &dev_attr_hotkey_bios_enabled.attr,
2947 &dev_attr_hotkey_bios_mask.attr,
2948 &dev_attr_hotkey_report_mode.attr,
2949 &dev_attr_hotkey_wakeup_reason.attr,
2950 &dev_attr_hotkey_wakeup_hotunplug_complete.attr,
2951 &dev_attr_hotkey_mask.attr,
2952 &dev_attr_hotkey_all_mask.attr,
2953 &dev_attr_hotkey_recommended_mask.attr,
2954 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2955 &dev_attr_hotkey_source_mask.attr,
2956 &dev_attr_hotkey_poll_freq.attr,
2957 #endif
2958 };
2959
2960 /*
2961 * Sync both the hw and sw blocking state of all switches
2962 */
2963 static void tpacpi_send_radiosw_update(void)
2964 {
2965 int wlsw;
2966
2967 /*
2968 * We must sync all rfkill controllers *before* issuing any
2969 * rfkill input events, or we will race the rfkill core input
2970 * handler.
2971 *
2972 * tpacpi_inputdev_send_mutex works as a synchronization point
2973 * for the above.
2974 *
2975 * We optimize to avoid numerous calls to hotkey_get_wlsw.
2976 */
2977
2978 wlsw = hotkey_get_wlsw();
2979
2980 /* Sync hw blocking state first if it is hw-blocked */
2981 if (wlsw == TPACPI_RFK_RADIO_OFF)
2982 tpacpi_rfk_update_hwblock_state(true);
2983
2984 /* Sync sw blocking state */
2985 tpacpi_rfk_update_swstate_all();
2986
2987 /* Sync hw blocking state last if it is hw-unblocked */
2988 if (wlsw == TPACPI_RFK_RADIO_ON)
2989 tpacpi_rfk_update_hwblock_state(false);
2990
2991 /* Issue rfkill input event for WLSW switch */
2992 if (!(wlsw < 0)) {
2993 mutex_lock(&tpacpi_inputdev_send_mutex);
2994
2995 input_report_switch(tpacpi_inputdev,
2996 SW_RFKILL_ALL, (wlsw > 0));
2997 input_sync(tpacpi_inputdev);
2998
2999 mutex_unlock(&tpacpi_inputdev_send_mutex);
3000 }
3001
3002 /*
3003 * this can be unconditional, as we will poll state again
3004 * if userspace uses the notify to read data
3005 */
3006 hotkey_radio_sw_notify_change();
3007 }
3008
3009 static void hotkey_exit(void)
3010 {
3011 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
3012 mutex_lock(&hotkey_mutex);
3013 hotkey_poll_stop_sync();
3014 mutex_unlock(&hotkey_mutex);
3015 #endif
3016
3017 if (hotkey_dev_attributes)
3018 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
3019
3020 kfree(hotkey_keycode_map);
3021
3022 dbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_HKEY,
3023 "restoring original HKEY status and mask\n");
3024 /* yes, there is a bitwise or below, we want the
3025 * functions to be called even if one of them fail */
3026 if (((tp_features.hotkey_mask &&
3027 hotkey_mask_set(hotkey_orig_mask)) |
3028 hotkey_status_set(false)) != 0)
3029 pr_err("failed to restore hot key mask "
3030 "to BIOS defaults\n");
3031 }
3032
3033 static void __init hotkey_unmap(const unsigned int scancode)
3034 {
3035 if (hotkey_keycode_map[scancode] != KEY_RESERVED) {
3036 clear_bit(hotkey_keycode_map[scancode],
3037 tpacpi_inputdev->keybit);
3038 hotkey_keycode_map[scancode] = KEY_RESERVED;
3039 }
3040 }
3041
3042 /*
3043 * HKEY quirks:
3044 * TPACPI_HK_Q_INIMASK: Supports FN+F3,FN+F4,FN+F12
3045 */
3046
3047 #define TPACPI_HK_Q_INIMASK 0x0001
3048
3049 static const struct tpacpi_quirk tpacpi_hotkey_qtable[] __initconst = {
3050 TPACPI_Q_IBM('I', 'H', TPACPI_HK_Q_INIMASK), /* 600E */
3051 TPACPI_Q_IBM('I', 'N', TPACPI_HK_Q_INIMASK), /* 600E */
3052 TPACPI_Q_IBM('I', 'D', TPACPI_HK_Q_INIMASK), /* 770, 770E, 770ED */
3053 TPACPI_Q_IBM('I', 'W', TPACPI_HK_Q_INIMASK), /* A20m */
3054 TPACPI_Q_IBM('I', 'V', TPACPI_HK_Q_INIMASK), /* A20p */
3055 TPACPI_Q_IBM('1', '0', TPACPI_HK_Q_INIMASK), /* A21e, A22e */
3056 TPACPI_Q_IBM('K', 'U', TPACPI_HK_Q_INIMASK), /* A21e */
3057 TPACPI_Q_IBM('K', 'X', TPACPI_HK_Q_INIMASK), /* A21m, A22m */
3058 TPACPI_Q_IBM('K', 'Y', TPACPI_HK_Q_INIMASK), /* A21p, A22p */
3059 TPACPI_Q_IBM('1', 'B', TPACPI_HK_Q_INIMASK), /* A22e */
3060 TPACPI_Q_IBM('1', '3', TPACPI_HK_Q_INIMASK), /* A22m */
3061 TPACPI_Q_IBM('1', 'E', TPACPI_HK_Q_INIMASK), /* A30/p (0) */
3062 TPACPI_Q_IBM('1', 'C', TPACPI_HK_Q_INIMASK), /* R30 */
3063 TPACPI_Q_IBM('1', 'F', TPACPI_HK_Q_INIMASK), /* R31 */
3064 TPACPI_Q_IBM('I', 'Y', TPACPI_HK_Q_INIMASK), /* T20 */
3065 TPACPI_Q_IBM('K', 'Z', TPACPI_HK_Q_INIMASK), /* T21 */
3066 TPACPI_Q_IBM('1', '6', TPACPI_HK_Q_INIMASK), /* T22 */
3067 TPACPI_Q_IBM('I', 'Z', TPACPI_HK_Q_INIMASK), /* X20, X21 */
3068 TPACPI_Q_IBM('1', 'D', TPACPI_HK_Q_INIMASK), /* X22, X23, X24 */
3069 };
3070
3071 typedef u16 tpacpi_keymap_entry_t;
3072 typedef tpacpi_keymap_entry_t tpacpi_keymap_t[TPACPI_HOTKEY_MAP_LEN];
3073
3074 static int __init hotkey_init(struct ibm_init_struct *iibm)
3075 {
3076 /* Requirements for changing the default keymaps:
3077 *
3078 * 1. Many of the keys are mapped to KEY_RESERVED for very
3079 * good reasons. Do not change them unless you have deep
3080 * knowledge on the IBM and Lenovo ThinkPad firmware for
3081 * the various ThinkPad models. The driver behaves
3082 * differently for KEY_RESERVED: such keys have their
3083 * hot key mask *unset* in mask_recommended, and also
3084 * in the initial hot key mask programmed into the
3085 * firmware at driver load time, which means the firm-
3086 * ware may react very differently if you change them to
3087 * something else;
3088 *
3089 * 2. You must be subscribed to the linux-thinkpad and
3090 * ibm-acpi-devel mailing lists, and you should read the
3091 * list archives since 2007 if you want to change the
3092 * keymaps. This requirement exists so that you will
3093 * know the past history of problems with the thinkpad-
3094 * acpi driver keymaps, and also that you will be
3095 * listening to any bug reports;
3096 *
3097 * 3. Do not send thinkpad-acpi specific patches directly to
3098 * for merging, *ever*. Send them to the linux-acpi
3099 * mailinglist for comments. Merging is to be done only
3100 * through acpi-test and the ACPI maintainer.
3101 *
3102 * If the above is too much to ask, don't change the keymap.
3103 * Ask the thinkpad-acpi maintainer to do it, instead.
3104 */
3105
3106 enum keymap_index {
3107 TPACPI_KEYMAP_IBM_GENERIC = 0,
3108 TPACPI_KEYMAP_LENOVO_GENERIC,
3109 };
3110
3111 static const tpacpi_keymap_t tpacpi_keymaps[] __initconst = {
3112 /* Generic keymap for IBM ThinkPads */
3113 [TPACPI_KEYMAP_IBM_GENERIC] = {
3114 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
3115 KEY_FN_F1, KEY_BATTERY, KEY_COFFEE, KEY_SLEEP,
3116 KEY_WLAN, KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
3117 KEY_FN_F9, KEY_FN_F10, KEY_FN_F11, KEY_SUSPEND,
3118
3119 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
3120 KEY_UNKNOWN, /* 0x0C: FN+BACKSPACE */
3121 KEY_UNKNOWN, /* 0x0D: FN+INSERT */
3122 KEY_UNKNOWN, /* 0x0E: FN+DELETE */
3123
3124 /* brightness: firmware always reacts to them */
3125 KEY_RESERVED, /* 0x0F: FN+HOME (brightness up) */
3126 KEY_RESERVED, /* 0x10: FN+END (brightness down) */
3127
3128 /* Thinklight: firmware always react to it */
3129 KEY_RESERVED, /* 0x11: FN+PGUP (thinklight toggle) */
3130
3131 KEY_UNKNOWN, /* 0x12: FN+PGDOWN */
3132 KEY_ZOOM, /* 0x13: FN+SPACE (zoom) */
3133
3134 /* Volume: firmware always react to it and reprograms
3135 * the built-in *extra* mixer. Never map it to control
3136 * another mixer by default. */
3137 KEY_RESERVED, /* 0x14: VOLUME UP */
3138 KEY_RESERVED, /* 0x15: VOLUME DOWN */
3139 KEY_RESERVED, /* 0x16: MUTE */
3140
3141 KEY_VENDOR, /* 0x17: Thinkpad/AccessIBM/Lenovo */
3142
3143 /* (assignments unknown, please report if found) */
3144 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3145 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3146 },
3147
3148 /* Generic keymap for Lenovo ThinkPads */
3149 [TPACPI_KEYMAP_LENOVO_GENERIC] = {
3150 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
3151 KEY_FN_F1, KEY_COFFEE, KEY_BATTERY, KEY_SLEEP,
3152 KEY_WLAN, KEY_CAMERA, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
3153 KEY_FN_F9, KEY_FN_F10, KEY_FN_F11, KEY_SUSPEND,
3154
3155 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
3156 KEY_UNKNOWN, /* 0x0C: FN+BACKSPACE */
3157 KEY_UNKNOWN, /* 0x0D: FN+INSERT */
3158 KEY_UNKNOWN, /* 0x0E: FN+DELETE */
3159
3160 /* These should be enabled --only-- when ACPI video
3161 * is disabled (i.e. in "vendor" mode), and are handled
3162 * in a special way by the init code */
3163 KEY_BRIGHTNESSUP, /* 0x0F: FN+HOME (brightness up) */
3164 KEY_BRIGHTNESSDOWN, /* 0x10: FN+END (brightness down) */
3165
3166 KEY_RESERVED, /* 0x11: FN+PGUP (thinklight toggle) */
3167
3168 KEY_UNKNOWN, /* 0x12: FN+PGDOWN */
3169 KEY_ZOOM, /* 0x13: FN+SPACE (zoom) */
3170
3171 /* Volume: z60/z61, T60 (BIOS version?): firmware always
3172 * react to it and reprograms the built-in *extra* mixer.
3173 * Never map it to control another mixer by default.
3174 *
3175 * T60?, T61, R60?, R61: firmware and EC tries to send
3176 * these over the regular keyboard, so these are no-ops,
3177 * but there are still weird bugs re. MUTE, so do not
3178 * change unless you get test reports from all Lenovo
3179 * models. May cause the BIOS to interfere with the
3180 * HDA mixer.
3181 */
3182 KEY_RESERVED, /* 0x14: VOLUME UP */
3183 KEY_RESERVED, /* 0x15: VOLUME DOWN */
3184 KEY_RESERVED, /* 0x16: MUTE */
3185
3186 KEY_VENDOR, /* 0x17: Thinkpad/AccessIBM/Lenovo */
3187
3188 /* (assignments unknown, please report if found) */
3189 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3190 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3191 },
3192 };
3193
3194 static const struct tpacpi_quirk tpacpi_keymap_qtable[] __initconst = {
3195 /* Generic maps (fallback) */
3196 {
3197 .vendor = PCI_VENDOR_ID_IBM,
3198 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY,
3199 .quirks = TPACPI_KEYMAP_IBM_GENERIC,
3200 },
3201 {
3202 .vendor = PCI_VENDOR_ID_LENOVO,
3203 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY,
3204 .quirks = TPACPI_KEYMAP_LENOVO_GENERIC,
3205 },
3206 };
3207
3208 #define TPACPI_HOTKEY_MAP_SIZE sizeof(tpacpi_keymap_t)
3209 #define TPACPI_HOTKEY_MAP_TYPESIZE sizeof(tpacpi_keymap_entry_t)
3210
3211 int res, i;
3212 int status;
3213 int hkeyv;
3214 bool radiosw_state = false;
3215 bool tabletsw_state = false;
3216
3217 unsigned long quirks;
3218 unsigned long keymap_id;
3219
3220 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3221 "initializing hotkey subdriver\n");
3222
3223 BUG_ON(!tpacpi_inputdev);
3224 BUG_ON(tpacpi_inputdev->open != NULL ||
3225 tpacpi_inputdev->close != NULL);
3226
3227 TPACPI_ACPIHANDLE_INIT(hkey);
3228 mutex_init(&hotkey_mutex);
3229
3230 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
3231 mutex_init(&hotkey_thread_mutex);
3232 mutex_init(&hotkey_thread_data_mutex);
3233 #endif
3234
3235 /* hotkey not supported on 570 */
3236 tp_features.hotkey = hkey_handle != NULL;
3237
3238 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3239 "hotkeys are %s\n",
3240 str_supported(tp_features.hotkey));
3241
3242 if (!tp_features.hotkey)
3243 return 1;
3244
3245 quirks = tpacpi_check_quirks(tpacpi_hotkey_qtable,
3246 ARRAY_SIZE(tpacpi_hotkey_qtable));
3247
3248 tpacpi_disable_brightness_delay();
3249
3250 /* MUST have enough space for all attributes to be added to
3251 * hotkey_dev_attributes */
3252 hotkey_dev_attributes = create_attr_set(
3253 ARRAY_SIZE(hotkey_attributes) + 2,
3254 NULL);
3255 if (!hotkey_dev_attributes)
3256 return -ENOMEM;
3257 res = add_many_to_attr_set(hotkey_dev_attributes,
3258 hotkey_attributes,
3259 ARRAY_SIZE(hotkey_attributes));
3260 if (res)
3261 goto err_exit;
3262
3263 /* mask not supported on 600e/x, 770e, 770x, A21e, A2xm/p,
3264 A30, R30, R31, T20-22, X20-21, X22-24. Detected by checking
3265 for HKEY interface version 0x100 */
3266 if (acpi_evalf(hkey_handle, &hkeyv, "MHKV", "qd")) {
3267 if ((hkeyv >> 8) != 1) {
3268 pr_err("unknown version of the HKEY interface: 0x%x\n",
3269 hkeyv);
3270 pr_err("please report this to %s\n", TPACPI_MAIL);
3271 } else {
3272 /*
3273 * MHKV 0x100 in A31, R40, R40e,
3274 * T4x, X31, and later
3275 */
3276 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3277 "firmware HKEY interface version: 0x%x\n",
3278 hkeyv);
3279
3280 /* Paranoia check AND init hotkey_all_mask */
3281 if (!acpi_evalf(hkey_handle, &hotkey_all_mask,
3282 "MHKA", "qd")) {
3283 pr_err("missing MHKA handler, "
3284 "please report this to %s\n",
3285 TPACPI_MAIL);
3286 /* Fallback: pre-init for FN+F3,F4,F12 */
3287 hotkey_all_mask = 0x080cU;
3288 } else {
3289 tp_features.hotkey_mask = 1;
3290 }
3291 }
3292 }
3293
3294 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3295 "hotkey masks are %s\n",
3296 str_supported(tp_features.hotkey_mask));
3297
3298 /* Init hotkey_all_mask if not initialized yet */
3299 if (!tp_features.hotkey_mask && !hotkey_all_mask &&
3300 (quirks & TPACPI_HK_Q_INIMASK))
3301 hotkey_all_mask = 0x080cU; /* FN+F12, FN+F4, FN+F3 */
3302
3303 /* Init hotkey_acpi_mask and hotkey_orig_mask */
3304 if (tp_features.hotkey_mask) {
3305 /* hotkey_source_mask *must* be zero for
3306 * the first hotkey_mask_get to return hotkey_orig_mask */
3307 res = hotkey_mask_get();
3308 if (res)
3309 goto err_exit;
3310
3311 hotkey_orig_mask = hotkey_acpi_mask;
3312 } else {
3313 hotkey_orig_mask = hotkey_all_mask;
3314 hotkey_acpi_mask = hotkey_all_mask;
3315 }
3316
3317 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3318 if (dbg_wlswemul) {
3319 tp_features.hotkey_wlsw = 1;
3320 radiosw_state = !!tpacpi_wlsw_emulstate;
3321 pr_info("radio switch emulation enabled\n");
3322 } else
3323 #endif
3324 /* Not all thinkpads have a hardware radio switch */
3325 if (acpi_evalf(hkey_handle, &status, "WLSW", "qd")) {
3326 tp_features.hotkey_wlsw = 1;
3327 radiosw_state = !!status;
3328 pr_info("radio switch found; radios are %s\n",
3329 enabled(status, 0));
3330 }
3331 if (tp_features.hotkey_wlsw)
3332 res = add_to_attr_set(hotkey_dev_attributes,
3333 &dev_attr_hotkey_radio_sw.attr);
3334
3335 /* For X41t, X60t, X61t Tablets... */
3336 if (!res && acpi_evalf(hkey_handle, &status, "MHKG", "qd")) {
3337 tp_features.hotkey_tablet = 1;
3338 tabletsw_state = !!(status & TP_HOTKEY_TABLET_MASK);
3339 pr_info("possible tablet mode switch found; "
3340 "ThinkPad in %s mode\n",
3341 (tabletsw_state) ? "tablet" : "laptop");
3342 res = add_to_attr_set(hotkey_dev_attributes,
3343 &dev_attr_hotkey_tablet_mode.attr);
3344 }
3345
3346 if (!res)
3347 res = register_attr_set_with_sysfs(
3348 hotkey_dev_attributes,
3349 &tpacpi_pdev->dev.kobj);
3350 if (res)
3351 goto err_exit;
3352
3353 /* Set up key map */
3354 hotkey_keycode_map = kmalloc(TPACPI_HOTKEY_MAP_SIZE,
3355 GFP_KERNEL);
3356 if (!hotkey_keycode_map) {
3357 pr_err("failed to allocate memory for key map\n");
3358 res = -ENOMEM;
3359 goto err_exit;
3360 }
3361
3362 keymap_id = tpacpi_check_quirks(tpacpi_keymap_qtable,
3363 ARRAY_SIZE(tpacpi_keymap_qtable));
3364 BUG_ON(keymap_id >= ARRAY_SIZE(tpacpi_keymaps));
3365 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3366 "using keymap number %lu\n", keymap_id);
3367
3368 memcpy(hotkey_keycode_map, &tpacpi_keymaps[keymap_id],
3369 TPACPI_HOTKEY_MAP_SIZE);
3370
3371 input_set_capability(tpacpi_inputdev, EV_MSC, MSC_SCAN);
3372 tpacpi_inputdev->keycodesize = TPACPI_HOTKEY_MAP_TYPESIZE;
3373 tpacpi_inputdev->keycodemax = TPACPI_HOTKEY_MAP_LEN;
3374 tpacpi_inputdev->keycode = hotkey_keycode_map;
3375 for (i = 0; i < TPACPI_HOTKEY_MAP_LEN; i++) {
3376 if (hotkey_keycode_map[i] != KEY_RESERVED) {
3377 input_set_capability(tpacpi_inputdev, EV_KEY,
3378 hotkey_keycode_map[i]);
3379 } else {
3380 if (i < sizeof(hotkey_reserved_mask)*8)
3381 hotkey_reserved_mask |= 1 << i;
3382 }
3383 }
3384
3385 if (tp_features.hotkey_wlsw) {
3386 input_set_capability(tpacpi_inputdev, EV_SW, SW_RFKILL_ALL);
3387 input_report_switch(tpacpi_inputdev,
3388 SW_RFKILL_ALL, radiosw_state);
3389 }
3390 if (tp_features.hotkey_tablet) {
3391 input_set_capability(tpacpi_inputdev, EV_SW, SW_TABLET_MODE);
3392 input_report_switch(tpacpi_inputdev,
3393 SW_TABLET_MODE, tabletsw_state);
3394 }
3395
3396 /* Do not issue duplicate brightness change events to
3397 * userspace. tpacpi_detect_brightness_capabilities() must have
3398 * been called before this point */
3399 if (tp_features.bright_acpimode && acpi_video_backlight_support()) {
3400 pr_info("This ThinkPad has standard ACPI backlight "
3401 "brightness control, supported by the ACPI "
3402 "video driver\n");
3403 pr_notice("Disabling thinkpad-acpi brightness events "
3404 "by default...\n");
3405
3406 /* Disable brightness up/down on Lenovo thinkpads when
3407 * ACPI is handling them, otherwise it is plain impossible
3408 * for userspace to do something even remotely sane */
3409 hotkey_reserved_mask |=
3410 (1 << TP_ACPI_HOTKEYSCAN_FNHOME)
3411 | (1 << TP_ACPI_HOTKEYSCAN_FNEND);
3412 hotkey_unmap(TP_ACPI_HOTKEYSCAN_FNHOME);
3413 hotkey_unmap(TP_ACPI_HOTKEYSCAN_FNEND);
3414 }
3415
3416 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
3417 hotkey_source_mask = TPACPI_HKEY_NVRAM_GOOD_MASK
3418 & ~hotkey_all_mask
3419 & ~hotkey_reserved_mask;
3420
3421 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3422 "hotkey source mask 0x%08x, polling freq %u\n",
3423 hotkey_source_mask, hotkey_poll_freq);
3424 #endif
3425
3426 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3427 "enabling firmware HKEY event interface...\n");
3428 res = hotkey_status_set(true);
3429 if (res) {
3430 hotkey_exit();
3431 return res;
3432 }
3433 res = hotkey_mask_set(((hotkey_all_mask & ~hotkey_reserved_mask)
3434 | hotkey_driver_mask)
3435 & ~hotkey_source_mask);
3436 if (res < 0 && res != -ENXIO) {
3437 hotkey_exit();
3438 return res;
3439 }
3440 hotkey_user_mask = (hotkey_acpi_mask | hotkey_source_mask)
3441 & ~hotkey_reserved_mask;
3442 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3443 "initial masks: user=0x%08x, fw=0x%08x, poll=0x%08x\n",
3444 hotkey_user_mask, hotkey_acpi_mask, hotkey_source_mask);
3445
3446 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3447 "legacy ibm/hotkey event reporting over procfs %s\n",
3448 (hotkey_report_mode < 2) ?
3449 "enabled" : "disabled");
3450
3451 tpacpi_inputdev->open = &hotkey_inputdev_open;
3452 tpacpi_inputdev->close = &hotkey_inputdev_close;
3453
3454 hotkey_poll_setup_safe(true);
3455
3456 return 0;
3457
3458 err_exit:
3459 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
3460 hotkey_dev_attributes = NULL;
3461
3462 return (res < 0)? res : 1;
3463 }
3464
3465 static bool hotkey_notify_hotkey(const u32 hkey,
3466 bool *send_acpi_ev,
3467 bool *ignore_acpi_ev)
3468 {
3469 /* 0x1000-0x1FFF: key presses */
3470 unsigned int scancode = hkey & 0xfff;
3471 *send_acpi_ev = true;
3472 *ignore_acpi_ev = false;
3473
3474 /* HKEY event 0x1001 is scancode 0x00 */
3475 if (scancode > 0 && scancode <= TPACPI_HOTKEY_MAP_LEN) {
3476 scancode--;
3477 if (!(hotkey_source_mask & (1 << scancode))) {
3478 tpacpi_input_send_key_masked(scancode);
3479 *send_acpi_ev = false;
3480 } else {
3481 *ignore_acpi_ev = true;
3482 }
3483 return true;
3484 }
3485 return false;
3486 }
3487
3488 static bool hotkey_notify_wakeup(const u32 hkey,
3489 bool *send_acpi_ev,
3490 bool *ignore_acpi_ev)
3491 {
3492 /* 0x2000-0x2FFF: Wakeup reason */
3493 *send_acpi_ev = true;
3494 *ignore_acpi_ev = false;
3495
3496 switch (hkey) {
3497 case TP_HKEY_EV_WKUP_S3_UNDOCK: /* suspend, undock */
3498 case TP_HKEY_EV_WKUP_S4_UNDOCK: /* hibernation, undock */
3499 hotkey_wakeup_reason = TP_ACPI_WAKEUP_UNDOCK;
3500 *ignore_acpi_ev = true;
3501 break;
3502
3503 case TP_HKEY_EV_WKUP_S3_BAYEJ: /* suspend, bay eject */
3504 case TP_HKEY_EV_WKUP_S4_BAYEJ: /* hibernation, bay eject */
3505 hotkey_wakeup_reason = TP_ACPI_WAKEUP_BAYEJ;
3506 *ignore_acpi_ev = true;
3507 break;
3508
3509 case TP_HKEY_EV_WKUP_S3_BATLOW: /* Battery on critical low level/S3 */
3510 case TP_HKEY_EV_WKUP_S4_BATLOW: /* Battery on critical low level/S4 */
3511 pr_alert("EMERGENCY WAKEUP: battery almost empty\n");
3512 /* how to auto-heal: */
3513 /* 2313: woke up from S3, go to S4/S5 */
3514 /* 2413: woke up from S4, go to S5 */
3515 break;
3516
3517 default:
3518 return false;
3519 }
3520
3521 if (hotkey_wakeup_reason != TP_ACPI_WAKEUP_NONE) {
3522 pr_info("woke up due to a hot-unplug request...\n");
3523 hotkey_wakeup_reason_notify_change();
3524 }
3525 return true;
3526 }
3527
3528 static bool hotkey_notify_dockevent(const u32 hkey,
3529 bool *send_acpi_ev,
3530 bool *ignore_acpi_ev)
3531 {
3532 /* 0x4000-0x4FFF: dock-related events */
3533 *send_acpi_ev = true;
3534 *ignore_acpi_ev = false;
3535
3536 switch (hkey) {
3537 case TP_HKEY_EV_UNDOCK_ACK:
3538 /* ACPI undock operation completed after wakeup */
3539 hotkey_autosleep_ack = 1;
3540 pr_info("undocked\n");
3541 hotkey_wakeup_hotunplug_complete_notify_change();
3542 return true;
3543
3544 case TP_HKEY_EV_HOTPLUG_DOCK: /* docked to port replicator */
3545 pr_info("docked into hotplug port replicator\n");
3546 return true;
3547 case TP_HKEY_EV_HOTPLUG_UNDOCK: /* undocked from port replicator */
3548 pr_info("undocked from hotplug port replicator\n");
3549 return true;
3550
3551 default:
3552 return false;
3553 }
3554 }
3555
3556 static bool hotkey_notify_usrevent(const u32 hkey,
3557 bool *send_acpi_ev,
3558 bool *ignore_acpi_ev)
3559 {
3560 /* 0x5000-0x5FFF: human interface helpers */
3561 *send_acpi_ev = true;
3562 *ignore_acpi_ev = false;
3563
3564 switch (hkey) {
3565 case TP_HKEY_EV_PEN_INSERTED: /* X61t: tablet pen inserted into bay */
3566 case TP_HKEY_EV_PEN_REMOVED: /* X61t: tablet pen removed from bay */
3567 return true;
3568
3569 case TP_HKEY_EV_TABLET_TABLET: /* X41t-X61t: tablet mode */
3570 case TP_HKEY_EV_TABLET_NOTEBOOK: /* X41t-X61t: normal mode */
3571 tpacpi_input_send_tabletsw();
3572 hotkey_tablet_mode_notify_change();
3573 *send_acpi_ev = false;
3574 return true;
3575
3576 case TP_HKEY_EV_LID_CLOSE: /* Lid closed */
3577 case TP_HKEY_EV_LID_OPEN: /* Lid opened */
3578 case TP_HKEY_EV_BRGHT_CHANGED: /* brightness changed */
3579 /* do not propagate these events */
3580 *ignore_acpi_ev = true;
3581 return true;
3582
3583 default:
3584 return false;
3585 }
3586 }
3587
3588 static void thermal_dump_all_sensors(void);
3589
3590 static bool hotkey_notify_6xxx(const u32 hkey,
3591 bool *send_acpi_ev,
3592 bool *ignore_acpi_ev)
3593 {
3594 bool known = true;
3595
3596 /* 0x6000-0x6FFF: thermal alarms/notices and keyboard events */
3597 *send_acpi_ev = true;
3598 *ignore_acpi_ev = false;
3599
3600 switch (hkey) {
3601 case TP_HKEY_EV_THM_TABLE_CHANGED:
3602 pr_info("EC reports that Thermal Table has changed\n");
3603 /* recommended action: do nothing, we don't have
3604 * Lenovo ATM information */
3605 return true;
3606 case TP_HKEY_EV_ALARM_BAT_HOT:
3607 pr_crit("THERMAL ALARM: battery is too hot!\n");
3608 /* recommended action: warn user through gui */
3609 break;
3610 case TP_HKEY_EV_ALARM_BAT_XHOT:
3611 pr_alert("THERMAL EMERGENCY: battery is extremely hot!\n");
3612 /* recommended action: immediate sleep/hibernate */
3613 break;
3614 case TP_HKEY_EV_ALARM_SENSOR_HOT:
3615 pr_crit("THERMAL ALARM: "
3616 "a sensor reports something is too hot!\n");
3617 /* recommended action: warn user through gui, that */
3618 /* some internal component is too hot */
3619 break;
3620 case TP_HKEY_EV_ALARM_SENSOR_XHOT:
3621 pr_alert("THERMAL EMERGENCY: "
3622 "a sensor reports something is extremely hot!\n");
3623 /* recommended action: immediate sleep/hibernate */
3624 break;
3625
3626 case TP_HKEY_EV_KEY_NUMLOCK:
3627 case TP_HKEY_EV_KEY_FN:
3628 /* key press events, we just ignore them as long as the EC
3629 * is still reporting them in the normal keyboard stream */
3630 *send_acpi_ev = false;
3631 *ignore_acpi_ev = true;
3632 return true;
3633
3634 default:
3635 pr_warn("unknown possible thermal alarm or keyboard event received\n");
3636 known = false;
3637 }
3638
3639 thermal_dump_all_sensors();
3640
3641 return known;
3642 }
3643
3644 static void hotkey_notify(struct ibm_struct *ibm, u32 event)
3645 {
3646 u32 hkey;
3647 bool send_acpi_ev;
3648 bool ignore_acpi_ev;
3649 bool known_ev;
3650
3651 if (event != 0x80) {
3652 pr_err("unknown HKEY notification event %d\n", event);
3653 /* forward it to userspace, maybe it knows how to handle it */
3654 acpi_bus_generate_netlink_event(
3655 ibm->acpi->device->pnp.device_class,
3656 dev_name(&ibm->acpi->device->dev),
3657 event, 0);
3658 return;
3659 }
3660
3661 while (1) {
3662 if (!acpi_evalf(hkey_handle, &hkey, "MHKP", "d")) {
3663 pr_err("failed to retrieve HKEY event\n");
3664 return;
3665 }
3666
3667 if (hkey == 0) {
3668 /* queue empty */
3669 return;
3670 }
3671
3672 send_acpi_ev = true;
3673 ignore_acpi_ev = false;
3674
3675 switch (hkey >> 12) {
3676 case 1:
3677 /* 0x1000-0x1FFF: key presses */
3678 known_ev = hotkey_notify_hotkey(hkey, &send_acpi_ev,
3679 &ignore_acpi_ev);
3680 break;
3681 case 2:
3682 /* 0x2000-0x2FFF: Wakeup reason */
3683 known_ev = hotkey_notify_wakeup(hkey, &send_acpi_ev,
3684 &ignore_acpi_ev);
3685 break;
3686 case 3:
3687 /* 0x3000-0x3FFF: bay-related wakeups */
3688 switch (hkey) {
3689 case TP_HKEY_EV_BAYEJ_ACK:
3690 hotkey_autosleep_ack = 1;
3691 pr_info("bay ejected\n");
3692 hotkey_wakeup_hotunplug_complete_notify_change();
3693 known_ev = true;
3694 break;
3695 case TP_HKEY_EV_OPTDRV_EJ:
3696 /* FIXME: kick libata if SATA link offline */
3697 known_ev = true;
3698 break;
3699 default:
3700 known_ev = false;
3701 }
3702 break;
3703 case 4:
3704 /* 0x4000-0x4FFF: dock-related events */
3705 known_ev = hotkey_notify_dockevent(hkey, &send_acpi_ev,
3706 &ignore_acpi_ev);
3707 break;
3708 case 5:
3709 /* 0x5000-0x5FFF: human interface helpers */
3710 known_ev = hotkey_notify_usrevent(hkey, &send_acpi_ev,
3711 &ignore_acpi_ev);
3712 break;
3713 case 6:
3714 /* 0x6000-0x6FFF: thermal alarms/notices and
3715 * keyboard events */
3716 known_ev = hotkey_notify_6xxx(hkey, &send_acpi_ev,
3717 &ignore_acpi_ev);
3718 break;
3719 case 7:
3720 /* 0x7000-0x7FFF: misc */
3721 if (tp_features.hotkey_wlsw &&
3722 hkey == TP_HKEY_EV_RFKILL_CHANGED) {
3723 tpacpi_send_radiosw_update();
3724 send_acpi_ev = 0;
3725 known_ev = true;
3726 break;
3727 }
3728 /* fallthrough to default */
3729 default:
3730 known_ev = false;
3731 }
3732 if (!known_ev) {
3733 pr_notice("unhandled HKEY event 0x%04x\n", hkey);
3734 pr_notice("please report the conditions when this "
3735 "event happened to %s\n", TPACPI_MAIL);
3736 }
3737
3738 /* Legacy events */
3739 if (!ignore_acpi_ev &&
3740 (send_acpi_ev || hotkey_report_mode < 2)) {
3741 acpi_bus_generate_proc_event(ibm->acpi->device,
3742 event, hkey);
3743 }
3744
3745 /* netlink events */
3746 if (!ignore_acpi_ev && send_acpi_ev) {
3747 acpi_bus_generate_netlink_event(
3748 ibm->acpi->device->pnp.device_class,
3749 dev_name(&ibm->acpi->device->dev),
3750 event, hkey);
3751 }
3752 }
3753 }
3754
3755 static void hotkey_suspend(pm_message_t state)
3756 {
3757 /* Do these on suspend, we get the events on early resume! */
3758 hotkey_wakeup_reason = TP_ACPI_WAKEUP_NONE;
3759 hotkey_autosleep_ack = 0;
3760 }
3761
3762 static void hotkey_resume(void)
3763 {
3764 tpacpi_disable_brightness_delay();
3765
3766 if (hotkey_status_set(true) < 0 ||
3767 hotkey_mask_set(hotkey_acpi_mask) < 0)
3768 pr_err("error while attempting to reset the event "
3769 "firmware interface\n");
3770
3771 tpacpi_send_radiosw_update();
3772 hotkey_tablet_mode_notify_change();
3773 hotkey_wakeup_reason_notify_change();
3774 hotkey_wakeup_hotunplug_complete_notify_change();
3775 hotkey_poll_setup_safe(false);
3776 }
3777
3778 /* procfs -------------------------------------------------------------- */
3779 static int hotkey_read(struct seq_file *m)
3780 {
3781 int res, status;
3782
3783 if (!tp_features.hotkey) {
3784 seq_printf(m, "status:\t\tnot supported\n");
3785 return 0;
3786 }
3787
3788 if (mutex_lock_killable(&hotkey_mutex))
3789 return -ERESTARTSYS;
3790 res = hotkey_status_get(&status);
3791 if (!res)
3792 res = hotkey_mask_get();
3793 mutex_unlock(&hotkey_mutex);
3794 if (res)
3795 return res;
3796
3797 seq_printf(m, "status:\t\t%s\n", enabled(status, 0));
3798 if (hotkey_all_mask) {
3799 seq_printf(m, "mask:\t\t0x%08x\n", hotkey_user_mask);
3800 seq_printf(m, "commands:\tenable, disable, reset, <mask>\n");
3801 } else {
3802 seq_printf(m, "mask:\t\tnot supported\n");
3803 seq_printf(m, "commands:\tenable, disable, reset\n");
3804 }
3805
3806 return 0;
3807 }
3808
3809 static void hotkey_enabledisable_warn(bool enable)
3810 {
3811 tpacpi_log_usertask("procfs hotkey enable/disable");
3812 if (!WARN((tpacpi_lifecycle == TPACPI_LIFE_RUNNING || !enable),
3813 pr_fmt("hotkey enable/disable functionality has been "
3814 "removed from the driver. "
3815 "Hotkeys are always enabled.\n")))
3816 pr_err("Please remove the hotkey=enable module "
3817 "parameter, it is deprecated. "
3818 "Hotkeys are always enabled.\n");
3819 }
3820
3821 static int hotkey_write(char *buf)
3822 {
3823 int res;
3824 u32 mask;
3825 char *cmd;
3826
3827 if (!tp_features.hotkey)
3828 return -ENODEV;
3829
3830 if (mutex_lock_killable(&hotkey_mutex))
3831 return -ERESTARTSYS;
3832
3833 mask = hotkey_user_mask;
3834
3835 res = 0;
3836 while ((cmd = next_cmd(&buf))) {
3837 if (strlencmp(cmd, "enable") == 0) {
3838 hotkey_enabledisable_warn(1);
3839 } else if (strlencmp(cmd, "disable") == 0) {
3840 hotkey_enabledisable_warn(0);
3841 res = -EPERM;
3842 } else if (strlencmp(cmd, "reset") == 0) {
3843 mask = (hotkey_all_mask | hotkey_source_mask)
3844 & ~hotkey_reserved_mask;
3845 } else if (sscanf(cmd, "0x%x", &mask) == 1) {
3846 /* mask set */
3847 } else if (sscanf(cmd, "%x", &mask) == 1) {
3848 /* mask set */
3849 } else {
3850 res = -EINVAL;
3851 goto errexit;
3852 }
3853 }
3854
3855 if (!res) {
3856 tpacpi_disclose_usertask("procfs hotkey",
3857 "set mask to 0x%08x\n", mask);
3858 res = hotkey_user_mask_set(mask);
3859 }
3860
3861 errexit:
3862 mutex_unlock(&hotkey_mutex);
3863 return res;
3864 }
3865
3866 static const struct acpi_device_id ibm_htk_device_ids[] = {
3867 {TPACPI_ACPI_IBM_HKEY_HID, 0},
3868 {TPACPI_ACPI_LENOVO_HKEY_HID, 0},
3869 {"", 0},
3870 };
3871
3872 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver = {
3873 .hid = ibm_htk_device_ids,
3874 .notify = hotkey_notify,
3875 .handle = &hkey_handle,
3876 .type = ACPI_DEVICE_NOTIFY,
3877 };
3878
3879 static struct ibm_struct hotkey_driver_data = {
3880 .name = "hotkey",
3881 .read = hotkey_read,
3882 .write = hotkey_write,
3883 .exit = hotkey_exit,
3884 .resume = hotkey_resume,
3885 .suspend = hotkey_suspend,
3886 .acpi = &ibm_hotkey_acpidriver,
3887 };
3888
3889 /*************************************************************************
3890 * Bluetooth subdriver
3891 */
3892
3893 enum {
3894 /* ACPI GBDC/SBDC bits */
3895 TP_ACPI_BLUETOOTH_HWPRESENT = 0x01, /* Bluetooth hw available */
3896 TP_ACPI_BLUETOOTH_RADIOSSW = 0x02, /* Bluetooth radio enabled */
3897 TP_ACPI_BLUETOOTH_RESUMECTRL = 0x04, /* Bluetooth state at resume:
3898 0 = disable, 1 = enable */
3899 };
3900
3901 enum {
3902 /* ACPI \BLTH commands */
3903 TP_ACPI_BLTH_GET_ULTRAPORT_ID = 0x00, /* Get Ultraport BT ID */
3904 TP_ACPI_BLTH_GET_PWR_ON_RESUME = 0x01, /* Get power-on-resume state */
3905 TP_ACPI_BLTH_PWR_ON_ON_RESUME = 0x02, /* Resume powered on */
3906 TP_ACPI_BLTH_PWR_OFF_ON_RESUME = 0x03, /* Resume powered off */
3907 TP_ACPI_BLTH_SAVE_STATE = 0x05, /* Save state for S4/S5 */
3908 };
3909
3910 #define TPACPI_RFK_BLUETOOTH_SW_NAME "tpacpi_bluetooth_sw"
3911
3912 static int bluetooth_get_status(void)
3913 {
3914 int status;
3915
3916 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3917 if (dbg_bluetoothemul)
3918 return (tpacpi_bluetooth_emulstate) ?
3919 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
3920 #endif
3921
3922 if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
3923 return -EIO;
3924
3925 return ((status & TP_ACPI_BLUETOOTH_RADIOSSW) != 0) ?
3926 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
3927 }
3928
3929 static int bluetooth_set_status(enum tpacpi_rfkill_state state)
3930 {
3931 int status;
3932
3933 vdbg_printk(TPACPI_DBG_RFKILL,
3934 "will attempt to %s bluetooth\n",
3935 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable");
3936
3937 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3938 if (dbg_bluetoothemul) {
3939 tpacpi_bluetooth_emulstate = (state == TPACPI_RFK_RADIO_ON);
3940 return 0;
3941 }
3942 #endif
3943
3944 if (state == TPACPI_RFK_RADIO_ON)
3945 status = TP_ACPI_BLUETOOTH_RADIOSSW
3946 | TP_ACPI_BLUETOOTH_RESUMECTRL;
3947 else
3948 status = 0;
3949
3950 if (!acpi_evalf(hkey_handle, NULL, "SBDC", "vd", status))
3951 return -EIO;
3952
3953 return 0;
3954 }
3955
3956 /* sysfs bluetooth enable ---------------------------------------------- */
3957 static ssize_t bluetooth_enable_show(struct device *dev,
3958 struct device_attribute *attr,
3959 char *buf)
3960 {
3961 return tpacpi_rfk_sysfs_enable_show(TPACPI_RFK_BLUETOOTH_SW_ID,
3962 attr, buf);
3963 }
3964
3965 static ssize_t bluetooth_enable_store(struct device *dev,
3966 struct device_attribute *attr,
3967 const char *buf, size_t count)
3968 {
3969 return tpacpi_rfk_sysfs_enable_store(TPACPI_RFK_BLUETOOTH_SW_ID,
3970 attr, buf, count);
3971 }
3972
3973 static struct device_attribute dev_attr_bluetooth_enable =
3974 __ATTR(bluetooth_enable, S_IWUSR | S_IRUGO,
3975 bluetooth_enable_show, bluetooth_enable_store);
3976
3977 /* --------------------------------------------------------------------- */
3978
3979 static struct attribute *bluetooth_attributes[] = {
3980 &dev_attr_bluetooth_enable.attr,
3981 NULL
3982 };
3983
3984 static const struct attribute_group bluetooth_attr_group = {
3985 .attrs = bluetooth_attributes,
3986 };
3987
3988 static const struct tpacpi_rfk_ops bluetooth_tprfk_ops = {
3989 .get_status = bluetooth_get_status,
3990 .set_status = bluetooth_set_status,
3991 };
3992
3993 static void bluetooth_shutdown(void)
3994 {
3995 /* Order firmware to save current state to NVRAM */
3996 if (!acpi_evalf(NULL, NULL, "\\BLTH", "vd",
3997 TP_ACPI_BLTH_SAVE_STATE))
3998 pr_notice("failed to save bluetooth state to NVRAM\n");
3999 else
4000 vdbg_printk(TPACPI_DBG_RFKILL,
4001 "bluestooth state saved to NVRAM\n");
4002 }
4003
4004 static void bluetooth_exit(void)
4005 {
4006 sysfs_remove_group(&tpacpi_pdev->dev.kobj,
4007 &bluetooth_attr_group);
4008
4009 tpacpi_destroy_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID);
4010
4011 bluetooth_shutdown();
4012 }
4013
4014 static int __init bluetooth_init(struct ibm_init_struct *iibm)
4015 {
4016 int res;
4017 int status = 0;
4018
4019 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4020 "initializing bluetooth subdriver\n");
4021
4022 TPACPI_ACPIHANDLE_INIT(hkey);
4023
4024 /* bluetooth not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
4025 G4x, R30, R31, R40e, R50e, T20-22, X20-21 */
4026 tp_features.bluetooth = hkey_handle &&
4027 acpi_evalf(hkey_handle, &status, "GBDC", "qd");
4028
4029 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4030 "bluetooth is %s, status 0x%02x\n",
4031 str_supported(tp_features.bluetooth),
4032 status);
4033
4034 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4035 if (dbg_bluetoothemul) {
4036 tp_features.bluetooth = 1;
4037 pr_info("bluetooth switch emulation enabled\n");
4038 } else
4039 #endif
4040 if (tp_features.bluetooth &&
4041 !(status & TP_ACPI_BLUETOOTH_HWPRESENT)) {
4042 /* no bluetooth hardware present in system */
4043 tp_features.bluetooth = 0;
4044 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4045 "bluetooth hardware not installed\n");
4046 }
4047
4048 if (!tp_features.bluetooth)
4049 return 1;
4050
4051 res = tpacpi_new_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID,
4052 &bluetooth_tprfk_ops,
4053 RFKILL_TYPE_BLUETOOTH,
4054 TPACPI_RFK_BLUETOOTH_SW_NAME,
4055 true);
4056 if (res)
4057 return res;
4058
4059 res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
4060 &bluetooth_attr_group);
4061 if (res) {
4062 tpacpi_destroy_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID);
4063 return res;
4064 }
4065
4066 return 0;
4067 }
4068
4069 /* procfs -------------------------------------------------------------- */
4070 static int bluetooth_read(struct seq_file *m)
4071 {
4072 return tpacpi_rfk_procfs_read(TPACPI_RFK_BLUETOOTH_SW_ID, m);
4073 }
4074
4075 static int bluetooth_write(char *buf)
4076 {
4077 return tpacpi_rfk_procfs_write(TPACPI_RFK_BLUETOOTH_SW_ID, buf);
4078 }
4079
4080 static struct ibm_struct bluetooth_driver_data = {
4081 .name = "bluetooth",
4082 .read = bluetooth_read,
4083 .write = bluetooth_write,
4084 .exit = bluetooth_exit,
4085 .shutdown = bluetooth_shutdown,
4086 };
4087
4088 /*************************************************************************
4089 * Wan subdriver
4090 */
4091
4092 enum {
4093 /* ACPI GWAN/SWAN bits */
4094 TP_ACPI_WANCARD_HWPRESENT = 0x01, /* Wan hw available */
4095 TP_ACPI_WANCARD_RADIOSSW = 0x02, /* Wan radio enabled */
4096 TP_ACPI_WANCARD_RESUMECTRL = 0x04, /* Wan state at resume:
4097 0 = disable, 1 = enable */
4098 };
4099
4100 #define TPACPI_RFK_WWAN_SW_NAME "tpacpi_wwan_sw"
4101
4102 static int wan_get_status(void)
4103 {
4104 int status;
4105
4106 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4107 if (dbg_wwanemul)
4108 return (tpacpi_wwan_emulstate) ?
4109 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4110 #endif
4111
4112 if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
4113 return -EIO;
4114
4115 return ((status & TP_ACPI_WANCARD_RADIOSSW) != 0) ?
4116 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4117 }
4118
4119 static int wan_set_status(enum tpacpi_rfkill_state state)
4120 {
4121 int status;
4122
4123 vdbg_printk(TPACPI_DBG_RFKILL,
4124 "will attempt to %s wwan\n",
4125 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable");
4126
4127 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4128 if (dbg_wwanemul) {
4129 tpacpi_wwan_emulstate = (state == TPACPI_RFK_RADIO_ON);
4130 return 0;
4131 }
4132 #endif
4133
4134 if (state == TPACPI_RFK_RADIO_ON)
4135 status = TP_ACPI_WANCARD_RADIOSSW
4136 | TP_ACPI_WANCARD_RESUMECTRL;
4137 else
4138 status = 0;
4139
4140 if (!acpi_evalf(hkey_handle, NULL, "SWAN", "vd", status))
4141 return -EIO;
4142
4143 return 0;
4144 }
4145
4146 /* sysfs wan enable ---------------------------------------------------- */
4147 static ssize_t wan_enable_show(struct device *dev,
4148 struct device_attribute *attr,
4149 char *buf)
4150 {
4151 return tpacpi_rfk_sysfs_enable_show(TPACPI_RFK_WWAN_SW_ID,
4152 attr, buf);
4153 }
4154
4155 static ssize_t wan_enable_store(struct device *dev,
4156 struct device_attribute *attr,
4157 const char *buf, size_t count)
4158 {
4159 return tpacpi_rfk_sysfs_enable_store(TPACPI_RFK_WWAN_SW_ID,
4160 attr, buf, count);
4161 }
4162
4163 static struct device_attribute dev_attr_wan_enable =
4164 __ATTR(wwan_enable, S_IWUSR | S_IRUGO,
4165 wan_enable_show, wan_enable_store);
4166
4167 /* --------------------------------------------------------------------- */
4168
4169 static struct attribute *wan_attributes[] = {
4170 &dev_attr_wan_enable.attr,
4171 NULL
4172 };
4173
4174 static const struct attribute_group wan_attr_group = {
4175 .attrs = wan_attributes,
4176 };
4177
4178 static const struct tpacpi_rfk_ops wan_tprfk_ops = {
4179 .get_status = wan_get_status,
4180 .set_status = wan_set_status,
4181 };
4182
4183 static void wan_shutdown(void)
4184 {
4185 /* Order firmware to save current state to NVRAM */
4186 if (!acpi_evalf(NULL, NULL, "\\WGSV", "vd",
4187 TP_ACPI_WGSV_SAVE_STATE))
4188 pr_notice("failed to save WWAN state to NVRAM\n");
4189 else
4190 vdbg_printk(TPACPI_DBG_RFKILL,
4191 "WWAN state saved to NVRAM\n");
4192 }
4193
4194 static void wan_exit(void)
4195 {
4196 sysfs_remove_group(&tpacpi_pdev->dev.kobj,
4197 &wan_attr_group);
4198
4199 tpacpi_destroy_rfkill(TPACPI_RFK_WWAN_SW_ID);
4200
4201 wan_shutdown();
4202 }
4203
4204 static int __init wan_init(struct ibm_init_struct *iibm)
4205 {
4206 int res;
4207 int status = 0;
4208
4209 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4210 "initializing wan subdriver\n");
4211
4212 TPACPI_ACPIHANDLE_INIT(hkey);
4213
4214 tp_features.wan = hkey_handle &&
4215 acpi_evalf(hkey_handle, &status, "GWAN", "qd");
4216
4217 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4218 "wan is %s, status 0x%02x\n",
4219 str_supported(tp_features.wan),
4220 status);
4221
4222 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4223 if (dbg_wwanemul) {
4224 tp_features.wan = 1;
4225 pr_info("wwan switch emulation enabled\n");
4226 } else
4227 #endif
4228 if (tp_features.wan &&
4229 !(status & TP_ACPI_WANCARD_HWPRESENT)) {
4230 /* no wan hardware present in system */
4231 tp_features.wan = 0;
4232 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4233 "wan hardware not installed\n");
4234 }
4235
4236 if (!tp_features.wan)
4237 return 1;
4238
4239 res = tpacpi_new_rfkill(TPACPI_RFK_WWAN_SW_ID,
4240 &wan_tprfk_ops,
4241 RFKILL_TYPE_WWAN,
4242 TPACPI_RFK_WWAN_SW_NAME,
4243 true);
4244 if (res)
4245 return res;
4246
4247 res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
4248 &wan_attr_group);
4249
4250 if (res) {
4251 tpacpi_destroy_rfkill(TPACPI_RFK_WWAN_SW_ID);
4252 return res;
4253 }
4254
4255 return 0;
4256 }
4257
4258 /* procfs -------------------------------------------------------------- */
4259 static int wan_read(struct seq_file *m)
4260 {
4261 return tpacpi_rfk_procfs_read(TPACPI_RFK_WWAN_SW_ID, m);
4262 }
4263
4264 static int wan_write(char *buf)
4265 {
4266 return tpacpi_rfk_procfs_write(TPACPI_RFK_WWAN_SW_ID, buf);
4267 }
4268
4269 static struct ibm_struct wan_driver_data = {
4270 .name = "wan",
4271 .read = wan_read,
4272 .write = wan_write,
4273 .exit = wan_exit,
4274 .shutdown = wan_shutdown,
4275 };
4276
4277 /*************************************************************************
4278 * UWB subdriver
4279 */
4280
4281 enum {
4282 /* ACPI GUWB/SUWB bits */
4283 TP_ACPI_UWB_HWPRESENT = 0x01, /* UWB hw available */
4284 TP_ACPI_UWB_RADIOSSW = 0x02, /* UWB radio enabled */
4285 };
4286
4287 #define TPACPI_RFK_UWB_SW_NAME "tpacpi_uwb_sw"
4288
4289 static int uwb_get_status(void)
4290 {
4291 int status;
4292
4293 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4294 if (dbg_uwbemul)
4295 return (tpacpi_uwb_emulstate) ?
4296 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4297 #endif
4298
4299 if (!acpi_evalf(hkey_handle, &status, "GUWB", "d"))
4300 return -EIO;
4301
4302 return ((status & TP_ACPI_UWB_RADIOSSW) != 0) ?
4303 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4304 }
4305
4306 static int uwb_set_status(enum tpacpi_rfkill_state state)
4307 {
4308 int status;
4309
4310 vdbg_printk(TPACPI_DBG_RFKILL,
4311 "will attempt to %s UWB\n",
4312 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable");
4313
4314 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4315 if (dbg_uwbemul) {
4316 tpacpi_uwb_emulstate = (state == TPACPI_RFK_RADIO_ON);
4317 return 0;
4318 }
4319 #endif
4320
4321 if (state == TPACPI_RFK_RADIO_ON)
4322 status = TP_ACPI_UWB_RADIOSSW;
4323 else
4324 status = 0;
4325
4326 if (!acpi_evalf(hkey_handle, NULL, "SUWB", "vd", status))
4327 return -EIO;
4328
4329 return 0;
4330 }
4331
4332 /* --------------------------------------------------------------------- */
4333
4334 static const struct tpacpi_rfk_ops uwb_tprfk_ops = {
4335 .get_status = uwb_get_status,
4336 .set_status = uwb_set_status,
4337 };
4338
4339 static void uwb_exit(void)
4340 {
4341 tpacpi_destroy_rfkill(TPACPI_RFK_UWB_SW_ID);
4342 }
4343
4344 static int __init uwb_init(struct ibm_init_struct *iibm)
4345 {
4346 int res;
4347 int status = 0;
4348
4349 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4350 "initializing uwb subdriver\n");
4351
4352 TPACPI_ACPIHANDLE_INIT(hkey);
4353
4354 tp_features.uwb = hkey_handle &&
4355 acpi_evalf(hkey_handle, &status, "GUWB", "qd");
4356
4357 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4358 "uwb is %s, status 0x%02x\n",
4359 str_supported(tp_features.uwb),
4360 status);
4361
4362 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4363 if (dbg_uwbemul) {
4364 tp_features.uwb = 1;
4365 pr_info("uwb switch emulation enabled\n");
4366 } else
4367 #endif
4368 if (tp_features.uwb &&
4369 !(status & TP_ACPI_UWB_HWPRESENT)) {
4370 /* no uwb hardware present in system */
4371 tp_features.uwb = 0;
4372 dbg_printk(TPACPI_DBG_INIT,
4373 "uwb hardware not installed\n");
4374 }
4375
4376 if (!tp_features.uwb)
4377 return 1;
4378
4379 res = tpacpi_new_rfkill(TPACPI_RFK_UWB_SW_ID,
4380 &uwb_tprfk_ops,
4381 RFKILL_TYPE_UWB,
4382 TPACPI_RFK_UWB_SW_NAME,
4383 false);
4384 return res;
4385 }
4386
4387 static struct ibm_struct uwb_driver_data = {
4388 .name = "uwb",
4389 .exit = uwb_exit,
4390 .flags.experimental = 1,
4391 };
4392
4393 /*************************************************************************
4394 * Video subdriver
4395 */
4396
4397 #ifdef CONFIG_THINKPAD_ACPI_VIDEO
4398
4399 enum video_access_mode {
4400 TPACPI_VIDEO_NONE = 0,
4401 TPACPI_VIDEO_570, /* 570 */
4402 TPACPI_VIDEO_770, /* 600e/x, 770e, 770x */
4403 TPACPI_VIDEO_NEW, /* all others */
4404 };
4405
4406 enum { /* video status flags, based on VIDEO_570 */
4407 TP_ACPI_VIDEO_S_LCD = 0x01, /* LCD output enabled */
4408 TP_ACPI_VIDEO_S_CRT = 0x02, /* CRT output enabled */
4409 TP_ACPI_VIDEO_S_DVI = 0x08, /* DVI output enabled */
4410 };
4411
4412 enum { /* TPACPI_VIDEO_570 constants */
4413 TP_ACPI_VIDEO_570_PHSCMD = 0x87, /* unknown magic constant :( */
4414 TP_ACPI_VIDEO_570_PHSMASK = 0x03, /* PHS bits that map to
4415 * video_status_flags */
4416 TP_ACPI_VIDEO_570_PHS2CMD = 0x8b, /* unknown magic constant :( */
4417 TP_ACPI_VIDEO_570_PHS2SET = 0x80, /* unknown magic constant :( */
4418 };
4419
4420 static enum video_access_mode video_supported;
4421 static int video_orig_autosw;
4422
4423 static int video_autosw_get(void);
4424 static int video_autosw_set(int enable);
4425
4426 TPACPI_HANDLE(vid, root,
4427 "\\_SB.PCI.AGP.VGA", /* 570 */
4428 "\\_SB.PCI0.AGP0.VID0", /* 600e/x, 770x */
4429 "\\_SB.PCI0.VID0", /* 770e */
4430 "\\_SB.PCI0.VID", /* A21e, G4x, R50e, X30, X40 */
4431 "\\_SB.PCI0.AGP.VGA", /* X100e and a few others */
4432 "\\_SB.PCI0.AGP.VID", /* all others */
4433 ); /* R30, R31 */
4434
4435 TPACPI_HANDLE(vid2, root, "\\_SB.PCI0.AGPB.VID"); /* G41 */
4436
4437 static int __init video_init(struct ibm_init_struct *iibm)
4438 {
4439 int ivga;
4440
4441 vdbg_printk(TPACPI_DBG_INIT, "initializing video subdriver\n");
4442
4443 TPACPI_ACPIHANDLE_INIT(vid);
4444 if (tpacpi_is_ibm())
4445 TPACPI_ACPIHANDLE_INIT(vid2);
4446
4447 if (vid2_handle && acpi_evalf(NULL, &ivga, "\\IVGA", "d") && ivga)
4448 /* G41, assume IVGA doesn't change */
4449 vid_handle = vid2_handle;
4450
4451 if (!vid_handle)
4452 /* video switching not supported on R30, R31 */
4453 video_supported = TPACPI_VIDEO_NONE;
4454 else if (tpacpi_is_ibm() &&
4455 acpi_evalf(vid_handle, &video_orig_autosw, "SWIT", "qd"))
4456 /* 570 */
4457 video_supported = TPACPI_VIDEO_570;
4458 else if (tpacpi_is_ibm() &&
4459 acpi_evalf(vid_handle, &video_orig_autosw, "^VADL", "qd"))
4460 /* 600e/x, 770e, 770x */
4461 video_supported = TPACPI_VIDEO_770;
4462 else
4463 /* all others */
4464 video_supported = TPACPI_VIDEO_NEW;
4465
4466 vdbg_printk(TPACPI_DBG_INIT, "video is %s, mode %d\n",
4467 str_supported(video_supported != TPACPI_VIDEO_NONE),
4468 video_supported);
4469
4470 return (video_supported != TPACPI_VIDEO_NONE)? 0 : 1;
4471 }
4472
4473 static void video_exit(void)
4474 {
4475 dbg_printk(TPACPI_DBG_EXIT,
4476 "restoring original video autoswitch mode\n");
4477 if (video_autosw_set(video_orig_autosw))
4478 pr_err("error while trying to restore original "
4479 "video autoswitch mode\n");
4480 }
4481
4482 static int video_outputsw_get(void)
4483 {
4484 int status = 0;
4485 int i;
4486
4487 switch (video_supported) {
4488 case TPACPI_VIDEO_570:
4489 if (!acpi_evalf(NULL, &i, "\\_SB.PHS", "dd",
4490 TP_ACPI_VIDEO_570_PHSCMD))
4491 return -EIO;
4492 status = i & TP_ACPI_VIDEO_570_PHSMASK;
4493 break;
4494 case TPACPI_VIDEO_770:
4495 if (!acpi_evalf(NULL, &i, "\\VCDL", "d"))
4496 return -EIO;
4497 if (i)
4498 status |= TP_ACPI_VIDEO_S_LCD;
4499 if (!acpi_evalf(NULL, &i, "\\VCDC", "d"))
4500 return -EIO;
4501 if (i)
4502 status |= TP_ACPI_VIDEO_S_CRT;
4503 break;
4504 case TPACPI_VIDEO_NEW:
4505 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 1) ||
4506 !acpi_evalf(NULL, &i, "\\VCDC", "d"))
4507 return -EIO;
4508 if (i)
4509 status |= TP_ACPI_VIDEO_S_CRT;
4510
4511 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0) ||
4512 !acpi_evalf(NULL, &i, "\\VCDL", "d"))
4513 return -EIO;
4514 if (i)
4515 status |= TP_ACPI_VIDEO_S_LCD;
4516 if (!acpi_evalf(NULL, &i, "\\VCDD", "d"))
4517 return -EIO;
4518 if (i)
4519 status |= TP_ACPI_VIDEO_S_DVI;
4520 break;
4521 default:
4522 return -ENOSYS;
4523 }
4524
4525 return status;
4526 }
4527
4528 static int video_outputsw_set(int status)
4529 {
4530 int autosw;
4531 int res = 0;
4532
4533 switch (video_supported) {
4534 case TPACPI_VIDEO_570:
4535 res = acpi_evalf(NULL, NULL,
4536 "\\_SB.PHS2", "vdd",
4537 TP_ACPI_VIDEO_570_PHS2CMD,
4538 status | TP_ACPI_VIDEO_570_PHS2SET);
4539 break;
4540 case TPACPI_VIDEO_770:
4541 autosw = video_autosw_get();
4542 if (autosw < 0)
4543 return autosw;
4544
4545 res = video_autosw_set(1);
4546 if (res)
4547 return res;
4548 res = acpi_evalf(vid_handle, NULL,
4549 "ASWT", "vdd", status * 0x100, 0);
4550 if (!autosw && video_autosw_set(autosw)) {
4551 pr_err("video auto-switch left enabled due to error\n");
4552 return -EIO;
4553 }
4554 break;
4555 case TPACPI_VIDEO_NEW:
4556 res = acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0x80) &&
4557 acpi_evalf(NULL, NULL, "\\VSDS", "vdd", status, 1);
4558 break;
4559 default:
4560 return -ENOSYS;
4561 }
4562
4563 return (res)? 0 : -EIO;
4564 }
4565
4566 static int video_autosw_get(void)
4567 {
4568 int autosw = 0;
4569
4570 switch (video_supported) {
4571 case TPACPI_VIDEO_570:
4572 if (!acpi_evalf(vid_handle, &autosw, "SWIT", "d"))
4573 return -EIO;
4574 break;
4575 case TPACPI_VIDEO_770:
4576 case TPACPI_VIDEO_NEW:
4577 if (!acpi_evalf(vid_handle, &autosw, "^VDEE", "d"))
4578 return -EIO;
4579 break;
4580 default:
4581 return -ENOSYS;
4582 }
4583
4584 return autosw & 1;
4585 }
4586
4587 static int video_autosw_set(int enable)
4588 {
4589 if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", (enable)? 1 : 0))
4590 return -EIO;
4591 return 0;
4592 }
4593
4594 static int video_outputsw_cycle(void)
4595 {
4596 int autosw = video_autosw_get();
4597 int res;
4598
4599 if (autosw < 0)
4600 return autosw;
4601
4602 switch (video_supported) {
4603 case TPACPI_VIDEO_570:
4604 res = video_autosw_set(1);
4605 if (res)
4606 return res;
4607 res = acpi_evalf(ec_handle, NULL, "_Q16", "v");
4608 break;
4609 case TPACPI_VIDEO_770:
4610 case TPACPI_VIDEO_NEW:
4611 res = video_autosw_set(1);
4612 if (res)
4613 return res;
4614 res = acpi_evalf(vid_handle, NULL, "VSWT", "v");
4615 break;
4616 default:
4617 return -ENOSYS;
4618 }
4619 if (!autosw && video_autosw_set(autosw)) {
4620 pr_err("video auto-switch left enabled due to error\n");
4621 return -EIO;
4622 }
4623
4624 return (res)? 0 : -EIO;
4625 }
4626
4627 static int video_expand_toggle(void)
4628 {
4629 switch (video_supported) {
4630 case TPACPI_VIDEO_570:
4631 return acpi_evalf(ec_handle, NULL, "_Q17", "v")?
4632 0 : -EIO;
4633 case TPACPI_VIDEO_770:
4634 return acpi_evalf(vid_handle, NULL, "VEXP", "v")?
4635 0 : -EIO;
4636 case TPACPI_VIDEO_NEW:
4637 return acpi_evalf(NULL, NULL, "\\VEXP", "v")?
4638 0 : -EIO;
4639 default:
4640 return -ENOSYS;
4641 }
4642 /* not reached */
4643 }
4644
4645 static int video_read(struct seq_file *m)
4646 {
4647 int status, autosw;
4648
4649 if (video_supported == TPACPI_VIDEO_NONE) {
4650 seq_printf(m, "status:\t\tnot supported\n");
4651 return 0;
4652 }
4653
4654 /* Even reads can crash X.org, so... */
4655 if (!capable(CAP_SYS_ADMIN))
4656 return -EPERM;
4657
4658 status = video_outputsw_get();
4659 if (status < 0)
4660 return status;
4661
4662 autosw = video_autosw_get();
4663 if (autosw < 0)
4664 return autosw;
4665
4666 seq_printf(m, "status:\t\tsupported\n");
4667 seq_printf(m, "lcd:\t\t%s\n", enabled(status, 0));
4668 seq_printf(m, "crt:\t\t%s\n", enabled(status, 1));
4669 if (video_supported == TPACPI_VIDEO_NEW)
4670 seq_printf(m, "dvi:\t\t%s\n", enabled(status, 3));
4671 seq_printf(m, "auto:\t\t%s\n", enabled(autosw, 0));
4672 seq_printf(m, "commands:\tlcd_enable, lcd_disable\n");
4673 seq_printf(m, "commands:\tcrt_enable, crt_disable\n");
4674 if (video_supported == TPACPI_VIDEO_NEW)
4675 seq_printf(m, "commands:\tdvi_enable, dvi_disable\n");
4676 seq_printf(m, "commands:\tauto_enable, auto_disable\n");
4677 seq_printf(m, "commands:\tvideo_switch, expand_toggle\n");
4678
4679 return 0;
4680 }
4681
4682 static int video_write(char *buf)
4683 {
4684 char *cmd;
4685 int enable, disable, status;
4686 int res;
4687
4688 if (video_supported == TPACPI_VIDEO_NONE)
4689 return -ENODEV;
4690
4691 /* Even reads can crash X.org, let alone writes... */
4692 if (!capable(CAP_SYS_ADMIN))
4693 return -EPERM;
4694
4695 enable = 0;
4696 disable = 0;
4697
4698 while ((cmd = next_cmd(&buf))) {
4699 if (strlencmp(cmd, "lcd_enable") == 0) {
4700 enable |= TP_ACPI_VIDEO_S_LCD;
4701 } else if (strlencmp(cmd, "lcd_disable") == 0) {
4702 disable |= TP_ACPI_VIDEO_S_LCD;
4703 } else if (strlencmp(cmd, "crt_enable") == 0) {
4704 enable |= TP_ACPI_VIDEO_S_CRT;
4705 } else if (strlencmp(cmd, "crt_disable") == 0) {
4706 disable |= TP_ACPI_VIDEO_S_CRT;
4707 } else if (video_supported == TPACPI_VIDEO_NEW &&
4708 strlencmp(cmd, "dvi_enable") == 0) {
4709 enable |= TP_ACPI_VIDEO_S_DVI;
4710 } else if (video_supported == TPACPI_VIDEO_NEW &&
4711 strlencmp(cmd, "dvi_disable") == 0) {
4712 disable |= TP_ACPI_VIDEO_S_DVI;
4713 } else if (strlencmp(cmd, "auto_enable") == 0) {
4714 res = video_autosw_set(1);
4715 if (res)
4716 return res;
4717 } else if (strlencmp(cmd, "auto_disable") == 0) {
4718 res = video_autosw_set(0);
4719 if (res)
4720 return res;
4721 } else if (strlencmp(cmd, "video_switch") == 0) {
4722 res = video_outputsw_cycle();
4723 if (res)
4724 return res;
4725 } else if (strlencmp(cmd, "expand_toggle") == 0) {
4726 res = video_expand_toggle();
4727 if (res)
4728 return res;
4729 } else
4730 return -EINVAL;
4731 }
4732
4733 if (enable || disable) {
4734 status = video_outputsw_get();
4735 if (status < 0)
4736 return status;
4737 res = video_outputsw_set((status & ~disable) | enable);
4738 if (res)
4739 return res;
4740 }
4741
4742 return 0;
4743 }
4744
4745 static struct ibm_struct video_driver_data = {
4746 .name = "video",
4747 .read = video_read,
4748 .write = video_write,
4749 .exit = video_exit,
4750 };
4751
4752 #endif /* CONFIG_THINKPAD_ACPI_VIDEO */
4753
4754 /*************************************************************************
4755 * Light (thinklight) subdriver
4756 */
4757
4758 TPACPI_HANDLE(lght, root, "\\LGHT"); /* A21e, A2xm/p, T20-22, X20-21 */
4759 TPACPI_HANDLE(ledb, ec, "LEDB"); /* G4x */
4760
4761 static int light_get_status(void)
4762 {
4763 int status = 0;
4764
4765 if (tp_features.light_status) {
4766 if (!acpi_evalf(ec_handle, &status, "KBLT", "d"))
4767 return -EIO;
4768 return (!!status);
4769 }
4770
4771 return -ENXIO;
4772 }
4773
4774 static int light_set_status(int status)
4775 {
4776 int rc;
4777
4778 if (tp_features.light) {
4779 if (cmos_handle) {
4780 rc = acpi_evalf(cmos_handle, NULL, NULL, "vd",
4781 (status)?
4782 TP_CMOS_THINKLIGHT_ON :
4783 TP_CMOS_THINKLIGHT_OFF);
4784 } else {
4785 rc = acpi_evalf(lght_handle, NULL, NULL, "vd",
4786 (status)? 1 : 0);
4787 }
4788 return (rc)? 0 : -EIO;
4789 }
4790
4791 return -ENXIO;
4792 }
4793
4794 static void light_set_status_worker(struct work_struct *work)
4795 {
4796 struct tpacpi_led_classdev *data =
4797 container_of(work, struct tpacpi_led_classdev, work);
4798
4799 if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING))
4800 light_set_status((data->new_state != TPACPI_LED_OFF));
4801 }
4802
4803 static void light_sysfs_set(struct led_classdev *led_cdev,
4804 enum led_brightness brightness)
4805 {
4806 struct tpacpi_led_classdev *data =
4807 container_of(led_cdev,
4808 struct tpacpi_led_classdev,
4809 led_classdev);
4810 data->new_state = (brightness != LED_OFF) ?
4811 TPACPI_LED_ON : TPACPI_LED_OFF;
4812 queue_work(tpacpi_wq, &data->work);
4813 }
4814
4815 static enum led_brightness light_sysfs_get(struct led_classdev *led_cdev)
4816 {
4817 return (light_get_status() == 1)? LED_FULL : LED_OFF;
4818 }
4819
4820 static struct tpacpi_led_classdev tpacpi_led_thinklight = {
4821 .led_classdev = {
4822 .name = "tpacpi::thinklight",
4823 .brightness_set = &light_sysfs_set,
4824 .brightness_get = &light_sysfs_get,
4825 }
4826 };
4827
4828 static int __init light_init(struct ibm_init_struct *iibm)
4829 {
4830 int rc;
4831
4832 vdbg_printk(TPACPI_DBG_INIT, "initializing light subdriver\n");
4833
4834 if (tpacpi_is_ibm()) {
4835 TPACPI_ACPIHANDLE_INIT(ledb);
4836 TPACPI_ACPIHANDLE_INIT(lght);
4837 }
4838 TPACPI_ACPIHANDLE_INIT(cmos);
4839 INIT_WORK(&tpacpi_led_thinklight.work, light_set_status_worker);
4840
4841 /* light not supported on 570, 600e/x, 770e, 770x, G4x, R30, R31 */
4842 tp_features.light = (cmos_handle || lght_handle) && !ledb_handle;
4843
4844 if (tp_features.light)
4845 /* light status not supported on
4846 570, 600e/x, 770e, 770x, G4x, R30, R31, R32, X20 */
4847 tp_features.light_status =
4848 acpi_evalf(ec_handle, NULL, "KBLT", "qv");
4849
4850 vdbg_printk(TPACPI_DBG_INIT, "light is %s, light status is %s\n",
4851 str_supported(tp_features.light),
4852 str_supported(tp_features.light_status));
4853
4854 if (!tp_features.light)
4855 return 1;
4856
4857 rc = led_classdev_register(&tpacpi_pdev->dev,
4858 &tpacpi_led_thinklight.led_classdev);
4859
4860 if (rc < 0) {
4861 tp_features.light = 0;
4862 tp_features.light_status = 0;
4863 } else {
4864 rc = 0;
4865 }
4866
4867 return rc;
4868 }
4869
4870 static void light_exit(void)
4871 {
4872 led_classdev_unregister(&tpacpi_led_thinklight.led_classdev);
4873 if (work_pending(&tpacpi_led_thinklight.work))
4874 flush_workqueue(tpacpi_wq);
4875 }
4876
4877 static int light_read(struct seq_file *m)
4878 {
4879 int status;
4880
4881 if (!tp_features.light) {
4882 seq_printf(m, "status:\t\tnot supported\n");
4883 } else if (!tp_features.light_status) {
4884 seq_printf(m, "status:\t\tunknown\n");
4885 seq_printf(m, "commands:\ton, off\n");
4886 } else {
4887 status = light_get_status();
4888 if (status < 0)
4889 return status;
4890 seq_printf(m, "status:\t\t%s\n", onoff(status, 0));
4891 seq_printf(m, "commands:\ton, off\n");
4892 }
4893
4894 return 0;
4895 }
4896
4897 static int light_write(char *buf)
4898 {
4899 char *cmd;
4900 int newstatus = 0;
4901
4902 if (!tp_features.light)
4903 return -ENODEV;
4904
4905 while ((cmd = next_cmd(&buf))) {
4906 if (strlencmp(cmd, "on") == 0) {
4907 newstatus = 1;
4908 } else if (strlencmp(cmd, "off") == 0) {
4909 newstatus = 0;
4910 } else
4911 return -EINVAL;
4912 }
4913
4914 return light_set_status(newstatus);
4915 }
4916
4917 static struct ibm_struct light_driver_data = {
4918 .name = "light",
4919 .read = light_read,
4920 .write = light_write,
4921 .exit = light_exit,
4922 };
4923
4924 /*************************************************************************
4925 * CMOS subdriver
4926 */
4927
4928 /* sysfs cmos_command -------------------------------------------------- */
4929 static ssize_t cmos_command_store(struct device *dev,
4930 struct device_attribute *attr,
4931 const char *buf, size_t count)
4932 {
4933 unsigned long cmos_cmd;
4934 int res;
4935
4936 if (parse_strtoul(buf, 21, &cmos_cmd))
4937 return -EINVAL;
4938
4939 res = issue_thinkpad_cmos_command(cmos_cmd);
4940 return (res)? res : count;
4941 }
4942
4943 static struct device_attribute dev_attr_cmos_command =
4944 __ATTR(cmos_command, S_IWUSR, NULL, cmos_command_store);
4945
4946 /* --------------------------------------------------------------------- */
4947
4948 static int __init cmos_init(struct ibm_init_struct *iibm)
4949 {
4950 int res;
4951
4952 vdbg_printk(TPACPI_DBG_INIT,
4953 "initializing cmos commands subdriver\n");
4954
4955 TPACPI_ACPIHANDLE_INIT(cmos);
4956
4957 vdbg_printk(TPACPI_DBG_INIT, "cmos commands are %s\n",
4958 str_supported(cmos_handle != NULL));
4959
4960 res = device_create_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
4961 if (res)
4962 return res;
4963
4964 return (cmos_handle)? 0 : 1;
4965 }
4966
4967 static void cmos_exit(void)
4968 {
4969 device_remove_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
4970 }
4971
4972 static int cmos_read(struct seq_file *m)
4973 {
4974 /* cmos not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
4975 R30, R31, T20-22, X20-21 */
4976 if (!cmos_handle)
4977 seq_printf(m, "status:\t\tnot supported\n");
4978 else {
4979 seq_printf(m, "status:\t\tsupported\n");
4980 seq_printf(m, "commands:\t<cmd> (<cmd> is 0-21)\n");
4981 }
4982
4983 return 0;
4984 }
4985
4986 static int cmos_write(char *buf)
4987 {
4988 char *cmd;
4989 int cmos_cmd, res;
4990
4991 while ((cmd = next_cmd(&buf))) {
4992 if (sscanf(cmd, "%u", &cmos_cmd) == 1 &&
4993 cmos_cmd >= 0 && cmos_cmd <= 21) {
4994 /* cmos_cmd set */
4995 } else
4996 return -EINVAL;
4997
4998 res = issue_thinkpad_cmos_command(cmos_cmd);
4999 if (res)
5000 return res;
5001 }
5002
5003 return 0;
5004 }
5005
5006 static struct ibm_struct cmos_driver_data = {
5007 .name = "cmos",
5008 .read = cmos_read,
5009 .write = cmos_write,
5010 .exit = cmos_exit,
5011 };
5012
5013 /*************************************************************************
5014 * LED subdriver
5015 */
5016
5017 enum led_access_mode {
5018 TPACPI_LED_NONE = 0,
5019 TPACPI_LED_570, /* 570 */
5020 TPACPI_LED_OLD, /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
5021 TPACPI_LED_NEW, /* all others */
5022 };
5023
5024 enum { /* For TPACPI_LED_OLD */
5025 TPACPI_LED_EC_HLCL = 0x0c, /* EC reg to get led to power on */
5026 TPACPI_LED_EC_HLBL = 0x0d, /* EC reg to blink a lit led */
5027 TPACPI_LED_EC_HLMS = 0x0e, /* EC reg to select led to command */
5028 };
5029
5030 static enum led_access_mode led_supported;
5031
5032 static acpi_handle led_handle;
5033
5034 #define TPACPI_LED_NUMLEDS 16
5035 static struct tpacpi_led_classdev *tpacpi_leds;
5036 static enum led_status_t tpacpi_led_state_cache[TPACPI_LED_NUMLEDS];
5037 static const char * const tpacpi_led_names[TPACPI_LED_NUMLEDS] = {
5038 /* there's a limit of 19 chars + NULL before 2.6.26 */
5039 "tpacpi::power",
5040 "tpacpi:orange:batt",
5041 "tpacpi:green:batt",
5042 "tpacpi::dock_active",
5043 "tpacpi::bay_active",
5044 "tpacpi::dock_batt",
5045 "tpacpi::unknown_led",
5046 "tpacpi::standby",
5047 "tpacpi::dock_status1",
5048 "tpacpi::dock_status2",
5049 "tpacpi::unknown_led2",
5050 "tpacpi::unknown_led3",
5051 "tpacpi::thinkvantage",
5052 };
5053 #define TPACPI_SAFE_LEDS 0x1081U
5054
5055 static inline bool tpacpi_is_led_restricted(const unsigned int led)
5056 {
5057 #ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS
5058 return false;
5059 #else
5060 return (1U & (TPACPI_SAFE_LEDS >> led)) == 0;
5061 #endif
5062 }
5063
5064 static int led_get_status(const unsigned int led)
5065 {
5066 int status;
5067 enum led_status_t led_s;
5068
5069 switch (led_supported) {
5070 case TPACPI_LED_570:
5071 if (!acpi_evalf(ec_handle,
5072 &status, "GLED", "dd", 1 << led))
5073 return -EIO;
5074 led_s = (status == 0)?
5075 TPACPI_LED_OFF :
5076 ((status == 1)?
5077 TPACPI_LED_ON :
5078 TPACPI_LED_BLINK);
5079 tpacpi_led_state_cache[led] = led_s;
5080 return led_s;
5081 default:
5082 return -ENXIO;
5083 }
5084
5085 /* not reached */
5086 }
5087
5088 static int led_set_status(const unsigned int led,
5089 const enum led_status_t ledstatus)
5090 {
5091 /* off, on, blink. Index is led_status_t */
5092 static const unsigned int led_sled_arg1[] = { 0, 1, 3 };
5093 static const unsigned int led_led_arg1[] = { 0, 0x80, 0xc0 };
5094
5095 int rc = 0;
5096
5097 switch (led_supported) {
5098 case TPACPI_LED_570:
5099 /* 570 */
5100 if (unlikely(led > 7))
5101 return -EINVAL;
5102 if (unlikely(tpacpi_is_led_restricted(led)))
5103 return -EPERM;
5104 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
5105 (1 << led), led_sled_arg1[ledstatus]))
5106 rc = -EIO;
5107 break;
5108 case TPACPI_LED_OLD:
5109 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */
5110 if (unlikely(led > 7))
5111 return -EINVAL;
5112 if (unlikely(tpacpi_is_led_restricted(led)))
5113 return -EPERM;
5114 rc = ec_write(TPACPI_LED_EC_HLMS, (1 << led));
5115 if (rc >= 0)
5116 rc = ec_write(TPACPI_LED_EC_HLBL,
5117 (ledstatus == TPACPI_LED_BLINK) << led);
5118 if (rc >= 0)
5119 rc = ec_write(TPACPI_LED_EC_HLCL,
5120 (ledstatus != TPACPI_LED_OFF) << led);
5121 break;
5122 case TPACPI_LED_NEW:
5123 /* all others */
5124 if (unlikely(led >= TPACPI_LED_NUMLEDS))
5125 return -EINVAL;
5126 if (unlikely(tpacpi_is_led_restricted(led)))
5127 return -EPERM;
5128 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
5129 led, led_led_arg1[ledstatus]))
5130 rc = -EIO;
5131 break;
5132 default:
5133 rc = -ENXIO;
5134 }
5135
5136 if (!rc)
5137 tpacpi_led_state_cache[led] = ledstatus;
5138
5139 return rc;
5140 }
5141
5142 static void led_set_status_worker(struct work_struct *work)
5143 {
5144 struct tpacpi_led_classdev *data =
5145 container_of(work, struct tpacpi_led_classdev, work);
5146
5147 if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING))
5148 led_set_status(data->led, data->new_state);
5149 }
5150
5151 static void led_sysfs_set(struct led_classdev *led_cdev,
5152 enum led_brightness brightness)
5153 {
5154 struct tpacpi_led_classdev *data = container_of(led_cdev,
5155 struct tpacpi_led_classdev, led_classdev);
5156
5157 if (brightness == LED_OFF)
5158 data->new_state = TPACPI_LED_OFF;
5159 else if (tpacpi_led_state_cache[data->led] != TPACPI_LED_BLINK)
5160 data->new_state = TPACPI_LED_ON;
5161 else
5162 data->new_state = TPACPI_LED_BLINK;
5163
5164 queue_work(tpacpi_wq, &data->work);
5165 }
5166
5167 static int led_sysfs_blink_set(struct led_classdev *led_cdev,
5168 unsigned long *delay_on, unsigned long *delay_off)
5169 {
5170 struct tpacpi_led_classdev *data = container_of(led_cdev,
5171 struct tpacpi_led_classdev, led_classdev);
5172
5173 /* Can we choose the flash rate? */
5174 if (*delay_on == 0 && *delay_off == 0) {
5175 /* yes. set them to the hardware blink rate (1 Hz) */
5176 *delay_on = 500; /* ms */
5177 *delay_off = 500; /* ms */
5178 } else if ((*delay_on != 500) || (*delay_off != 500))
5179 return -EINVAL;
5180
5181 data->new_state = TPACPI_LED_BLINK;
5182 queue_work(tpacpi_wq, &data->work);
5183
5184 return 0;
5185 }
5186
5187 static enum led_brightness led_sysfs_get(struct led_classdev *led_cdev)
5188 {
5189 int rc;
5190
5191 struct tpacpi_led_classdev *data = container_of(led_cdev,
5192 struct tpacpi_led_classdev, led_classdev);
5193
5194 rc = led_get_status(data->led);
5195
5196 if (rc == TPACPI_LED_OFF || rc < 0)
5197 rc = LED_OFF; /* no error handling in led class :( */
5198 else
5199 rc = LED_FULL;
5200
5201 return rc;
5202 }
5203
5204 static void led_exit(void)
5205 {
5206 unsigned int i;
5207
5208 for (i = 0; i < TPACPI_LED_NUMLEDS; i++) {
5209 if (tpacpi_leds[i].led_classdev.name)
5210 led_classdev_unregister(&tpacpi_leds[i].led_classdev);
5211 }
5212
5213 kfree(tpacpi_leds);
5214 }
5215
5216 static int __init tpacpi_init_led(unsigned int led)
5217 {
5218 int rc;
5219
5220 tpacpi_leds[led].led = led;
5221
5222 /* LEDs with no name don't get registered */
5223 if (!tpacpi_led_names[led])
5224 return 0;
5225
5226 tpacpi_leds[led].led_classdev.brightness_set = &led_sysfs_set;
5227 tpacpi_leds[led].led_classdev.blink_set = &led_sysfs_blink_set;
5228 if (led_supported == TPACPI_LED_570)
5229 tpacpi_leds[led].led_classdev.brightness_get =
5230 &led_sysfs_get;
5231
5232 tpacpi_leds[led].led_classdev.name = tpacpi_led_names[led];
5233
5234 INIT_WORK(&tpacpi_leds[led].work, led_set_status_worker);
5235
5236 rc = led_classdev_register(&tpacpi_pdev->dev,
5237 &tpacpi_leds[led].led_classdev);
5238 if (rc < 0)
5239 tpacpi_leds[led].led_classdev.name = NULL;
5240
5241 return rc;
5242 }
5243
5244 static const struct tpacpi_quirk led_useful_qtable[] __initconst = {
5245 TPACPI_Q_IBM('1', 'E', 0x009f), /* A30 */
5246 TPACPI_Q_IBM('1', 'N', 0x009f), /* A31 */
5247 TPACPI_Q_IBM('1', 'G', 0x009f), /* A31 */
5248
5249 TPACPI_Q_IBM('1', 'I', 0x0097), /* T30 */
5250 TPACPI_Q_IBM('1', 'R', 0x0097), /* T40, T41, T42, R50, R51 */
5251 TPACPI_Q_IBM('7', '0', 0x0097), /* T43, R52 */
5252 TPACPI_Q_IBM('1', 'Y', 0x0097), /* T43 */
5253 TPACPI_Q_IBM('1', 'W', 0x0097), /* R50e */
5254 TPACPI_Q_IBM('1', 'V', 0x0097), /* R51 */
5255 TPACPI_Q_IBM('7', '8', 0x0097), /* R51e */
5256 TPACPI_Q_IBM('7', '6', 0x0097), /* R52 */
5257
5258 TPACPI_Q_IBM('1', 'K', 0x00bf), /* X30 */
5259 TPACPI_Q_IBM('1', 'Q', 0x00bf), /* X31, X32 */
5260 TPACPI_Q_IBM('1', 'U', 0x00bf), /* X40 */
5261 TPACPI_Q_IBM('7', '4', 0x00bf), /* X41 */
5262 TPACPI_Q_IBM('7', '5', 0x00bf), /* X41t */
5263
5264 TPACPI_Q_IBM('7', '9', 0x1f97), /* T60 (1) */
5265 TPACPI_Q_IBM('7', '7', 0x1f97), /* Z60* (1) */
5266 TPACPI_Q_IBM('7', 'F', 0x1f97), /* Z61* (1) */
5267 TPACPI_Q_IBM('7', 'B', 0x1fb7), /* X60 (1) */
5268
5269 /* (1) - may have excess leds enabled on MSB */
5270
5271 /* Defaults (order matters, keep last, don't reorder!) */
5272 { /* Lenovo */
5273 .vendor = PCI_VENDOR_ID_LENOVO,
5274 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY,
5275 .quirks = 0x1fffU,
5276 },
5277 { /* IBM ThinkPads with no EC version string */
5278 .vendor = PCI_VENDOR_ID_IBM,
5279 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_UNKNOWN,
5280 .quirks = 0x00ffU,
5281 },
5282 { /* IBM ThinkPads with EC version string */
5283 .vendor = PCI_VENDOR_ID_IBM,
5284 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY,
5285 .quirks = 0x00bfU,
5286 },
5287 };
5288
5289 #undef TPACPI_LEDQ_IBM
5290 #undef TPACPI_LEDQ_LNV
5291
5292 static enum led_access_mode __init led_init_detect_mode(void)
5293 {
5294 acpi_status status;
5295
5296 if (tpacpi_is_ibm()) {
5297 /* 570 */
5298 status = acpi_get_handle(ec_handle, "SLED", &led_handle);
5299 if (ACPI_SUCCESS(status))
5300 return TPACPI_LED_570;
5301
5302 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
5303 status = acpi_get_handle(ec_handle, "SYSL", &led_handle);
5304 if (ACPI_SUCCESS(status))
5305 return TPACPI_LED_OLD;
5306 }
5307
5308 /* most others */
5309 status = acpi_get_handle(ec_handle, "LED", &led_handle);
5310 if (ACPI_SUCCESS(status))
5311 return TPACPI_LED_NEW;
5312
5313 /* R30, R31, and unknown firmwares */
5314 led_handle = NULL;
5315 return TPACPI_LED_NONE;
5316 }
5317
5318 static int __init led_init(struct ibm_init_struct *iibm)
5319 {
5320 unsigned int i;
5321 int rc;
5322 unsigned long useful_leds;
5323
5324 vdbg_printk(TPACPI_DBG_INIT, "initializing LED subdriver\n");
5325
5326 led_supported = led_init_detect_mode();
5327
5328 vdbg_printk(TPACPI_DBG_INIT, "LED commands are %s, mode %d\n",
5329 str_supported(led_supported), led_supported);
5330
5331 if (led_supported == TPACPI_LED_NONE)
5332 return 1;
5333
5334 tpacpi_leds = kzalloc(sizeof(*tpacpi_leds) * TPACPI_LED_NUMLEDS,
5335 GFP_KERNEL);
5336 if (!tpacpi_leds) {
5337 pr_err("Out of memory for LED data\n");
5338 return -ENOMEM;
5339 }
5340
5341 useful_leds = tpacpi_check_quirks(led_useful_qtable,
5342 ARRAY_SIZE(led_useful_qtable));
5343
5344 for (i = 0; i < TPACPI_LED_NUMLEDS; i++) {
5345 if (!tpacpi_is_led_restricted(i) &&
5346 test_bit(i, &useful_leds)) {
5347 rc = tpacpi_init_led(i);
5348 if (rc < 0) {
5349 led_exit();
5350 return rc;
5351 }
5352 }
5353 }
5354
5355 #ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS
5356 pr_notice("warning: userspace override of important "
5357 "firmware LEDs is enabled\n");
5358 #endif
5359 return 0;
5360 }
5361
5362 #define str_led_status(s) \
5363 ((s) == TPACPI_LED_OFF ? "off" : \
5364 ((s) == TPACPI_LED_ON ? "on" : "blinking"))
5365
5366 static int led_read(struct seq_file *m)
5367 {
5368 if (!led_supported) {
5369 seq_printf(m, "status:\t\tnot supported\n");
5370 return 0;
5371 }
5372 seq_printf(m, "status:\t\tsupported\n");
5373
5374 if (led_supported == TPACPI_LED_570) {
5375 /* 570 */
5376 int i, status;
5377 for (i = 0; i < 8; i++) {
5378 status = led_get_status(i);
5379 if (status < 0)
5380 return -EIO;
5381 seq_printf(m, "%d:\t\t%s\n",
5382 i, str_led_status(status));
5383 }
5384 }
5385
5386 seq_printf(m, "commands:\t"
5387 "<led> on, <led> off, <led> blink (<led> is 0-15)\n");
5388
5389 return 0;
5390 }
5391
5392 static int led_write(char *buf)
5393 {
5394 char *cmd;
5395 int led, rc;
5396 enum led_status_t s;
5397
5398 if (!led_supported)
5399 return -ENODEV;
5400
5401 while ((cmd = next_cmd(&buf))) {
5402 if (sscanf(cmd, "%d", &led) != 1 || led < 0 || led > 15)
5403 return -EINVAL;
5404
5405 if (strstr(cmd, "off")) {
5406 s = TPACPI_LED_OFF;
5407 } else if (strstr(cmd, "on")) {
5408 s = TPACPI_LED_ON;
5409 } else if (strstr(cmd, "blink")) {
5410 s = TPACPI_LED_BLINK;
5411 } else {
5412 return -EINVAL;
5413 }
5414
5415 rc = led_set_status(led, s);
5416 if (rc < 0)
5417 return rc;
5418 }
5419
5420 return 0;
5421 }
5422
5423 static struct ibm_struct led_driver_data = {
5424 .name = "led",
5425 .read = led_read,
5426 .write = led_write,
5427 .exit = led_exit,
5428 };
5429
5430 /*************************************************************************
5431 * Beep subdriver
5432 */
5433
5434 TPACPI_HANDLE(beep, ec, "BEEP"); /* all except R30, R31 */
5435
5436 #define TPACPI_BEEP_Q1 0x0001
5437
5438 static const struct tpacpi_quirk beep_quirk_table[] __initconst = {
5439 TPACPI_Q_IBM('I', 'M', TPACPI_BEEP_Q1), /* 570 */
5440 TPACPI_Q_IBM('I', 'U', TPACPI_BEEP_Q1), /* 570E - unverified */
5441 };
5442
5443 static int __init beep_init(struct ibm_init_struct *iibm)
5444 {
5445 unsigned long quirks;
5446
5447 vdbg_printk(TPACPI_DBG_INIT, "initializing beep subdriver\n");
5448
5449 TPACPI_ACPIHANDLE_INIT(beep);
5450
5451 vdbg_printk(TPACPI_DBG_INIT, "beep is %s\n",
5452 str_supported(beep_handle != NULL));
5453
5454 quirks = tpacpi_check_quirks(beep_quirk_table,
5455 ARRAY_SIZE(beep_quirk_table));
5456
5457 tp_features.beep_needs_two_args = !!(quirks & TPACPI_BEEP_Q1);
5458
5459 return (beep_handle)? 0 : 1;
5460 }
5461
5462 static int beep_read(struct seq_file *m)
5463 {
5464 if (!beep_handle)
5465 seq_printf(m, "status:\t\tnot supported\n");
5466 else {
5467 seq_printf(m, "status:\t\tsupported\n");
5468 seq_printf(m, "commands:\t<cmd> (<cmd> is 0-17)\n");
5469 }
5470
5471 return 0;
5472 }
5473
5474 static int beep_write(char *buf)
5475 {
5476 char *cmd;
5477 int beep_cmd;
5478
5479 if (!beep_handle)
5480 return -ENODEV;
5481
5482 while ((cmd = next_cmd(&buf))) {
5483 if (sscanf(cmd, "%u", &beep_cmd) == 1 &&
5484 beep_cmd >= 0 && beep_cmd <= 17) {
5485 /* beep_cmd set */
5486 } else
5487 return -EINVAL;
5488 if (tp_features.beep_needs_two_args) {
5489 if (!acpi_evalf(beep_handle, NULL, NULL, "vdd",
5490 beep_cmd, 0))
5491 return -EIO;
5492 } else {
5493 if (!acpi_evalf(beep_handle, NULL, NULL, "vd",
5494 beep_cmd))
5495 return -EIO;
5496 }
5497 }
5498
5499 return 0;
5500 }
5501
5502 static struct ibm_struct beep_driver_data = {
5503 .name = "beep",
5504 .read = beep_read,
5505 .write = beep_write,
5506 };
5507
5508 /*************************************************************************
5509 * Thermal subdriver
5510 */
5511
5512 enum thermal_access_mode {
5513 TPACPI_THERMAL_NONE = 0, /* No thermal support */
5514 TPACPI_THERMAL_ACPI_TMP07, /* Use ACPI TMP0-7 */
5515 TPACPI_THERMAL_ACPI_UPDT, /* Use ACPI TMP0-7 with UPDT */
5516 TPACPI_THERMAL_TPEC_8, /* Use ACPI EC regs, 8 sensors */
5517 TPACPI_THERMAL_TPEC_16, /* Use ACPI EC regs, 16 sensors */
5518 };
5519
5520 enum { /* TPACPI_THERMAL_TPEC_* */
5521 TP_EC_THERMAL_TMP0 = 0x78, /* ACPI EC regs TMP 0..7 */
5522 TP_EC_THERMAL_TMP8 = 0xC0, /* ACPI EC regs TMP 8..15 */
5523 TP_EC_THERMAL_TMP_NA = -128, /* ACPI EC sensor not available */
5524
5525 TPACPI_THERMAL_SENSOR_NA = -128000, /* Sensor not available */
5526 };
5527
5528
5529 #define TPACPI_MAX_THERMAL_SENSORS 16 /* Max thermal sensors supported */
5530 struct ibm_thermal_sensors_struct {
5531 s32 temp[TPACPI_MAX_THERMAL_SENSORS];
5532 };
5533
5534 static enum thermal_access_mode thermal_read_mode;
5535
5536 /* idx is zero-based */
5537 static int thermal_get_sensor(int idx, s32 *value)
5538 {
5539 int t;
5540 s8 tmp;
5541 char tmpi[5];
5542
5543 t = TP_EC_THERMAL_TMP0;
5544
5545 switch (thermal_read_mode) {
5546 #if TPACPI_MAX_THERMAL_SENSORS >= 16
5547 case TPACPI_THERMAL_TPEC_16:
5548 if (idx >= 8 && idx <= 15) {
5549 t = TP_EC_THERMAL_TMP8;
5550 idx -= 8;
5551 }
5552 /* fallthrough */
5553 #endif
5554 case TPACPI_THERMAL_TPEC_8:
5555 if (idx <= 7) {
5556 if (!acpi_ec_read(t + idx, &tmp))
5557 return -EIO;
5558 *value = tmp * 1000;
5559 return 0;
5560 }
5561 break;
5562
5563 case TPACPI_THERMAL_ACPI_UPDT:
5564 if (idx <= 7) {
5565 snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
5566 if (!acpi_evalf(ec_handle, NULL, "UPDT", "v"))
5567 return -EIO;
5568 if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
5569 return -EIO;
5570 *value = (t - 2732) * 100;
5571 return 0;
5572 }
5573 break;
5574
5575 case TPACPI_THERMAL_ACPI_TMP07:
5576 if (idx <= 7) {
5577 snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
5578 if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
5579 return -EIO;
5580 if (t > 127 || t < -127)
5581 t = TP_EC_THERMAL_TMP_NA;
5582 *value = t * 1000;
5583 return 0;
5584 }
5585 break;
5586
5587 case TPACPI_THERMAL_NONE:
5588 default:
5589 return -ENOSYS;
5590 }
5591
5592 return -EINVAL;
5593 }
5594
5595 static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s)
5596 {
5597 int res, i;
5598 int n;
5599
5600 n = 8;
5601 i = 0;
5602
5603 if (!s)
5604 return -EINVAL;
5605
5606 if (thermal_read_mode == TPACPI_THERMAL_TPEC_16)
5607 n = 16;
5608
5609 for (i = 0 ; i < n; i++) {
5610 res = thermal_get_sensor(i, &s->temp[i]);
5611 if (res)
5612 return res;
5613 }
5614
5615 return n;
5616 }
5617
5618 static void thermal_dump_all_sensors(void)
5619 {
5620 int n, i;
5621 struct ibm_thermal_sensors_struct t;
5622
5623 n = thermal_get_sensors(&t);
5624 if (n <= 0)
5625 return;
5626
5627 pr_notice("temperatures (Celsius):");
5628
5629 for (i = 0; i < n; i++) {
5630 if (t.temp[i] != TPACPI_THERMAL_SENSOR_NA)
5631 pr_cont(" %d", (int)(t.temp[i] / 1000));
5632 else
5633 pr_cont(" N/A");
5634 }
5635
5636 pr_cont("\n");
5637 }
5638
5639 /* sysfs temp##_input -------------------------------------------------- */
5640
5641 static ssize_t thermal_temp_input_show(struct device *dev,
5642 struct device_attribute *attr,
5643 char *buf)
5644 {
5645 struct sensor_device_attribute *sensor_attr =
5646 to_sensor_dev_attr(attr);
5647 int idx = sensor_attr->index;
5648 s32 value;
5649 int res;
5650
5651 res = thermal_get_sensor(idx, &value);
5652 if (res)
5653 return res;
5654 if (value == TPACPI_THERMAL_SENSOR_NA)
5655 return -ENXIO;
5656
5657 return snprintf(buf, PAGE_SIZE, "%d\n", value);
5658 }
5659
5660 #define THERMAL_SENSOR_ATTR_TEMP(_idxA, _idxB) \
5661 SENSOR_ATTR(temp##_idxA##_input, S_IRUGO, \
5662 thermal_temp_input_show, NULL, _idxB)
5663
5664 static struct sensor_device_attribute sensor_dev_attr_thermal_temp_input[] = {
5665 THERMAL_SENSOR_ATTR_TEMP(1, 0),
5666 THERMAL_SENSOR_ATTR_TEMP(2, 1),
5667 THERMAL_SENSOR_ATTR_TEMP(3, 2),
5668 THERMAL_SENSOR_ATTR_TEMP(4, 3),
5669 THERMAL_SENSOR_ATTR_TEMP(5, 4),
5670 THERMAL_SENSOR_ATTR_TEMP(6, 5),
5671 THERMAL_SENSOR_ATTR_TEMP(7, 6),
5672 THERMAL_SENSOR_ATTR_TEMP(8, 7),
5673 THERMAL_SENSOR_ATTR_TEMP(9, 8),
5674 THERMAL_SENSOR_ATTR_TEMP(10, 9),
5675 THERMAL_SENSOR_ATTR_TEMP(11, 10),
5676 THERMAL_SENSOR_ATTR_TEMP(12, 11),
5677 THERMAL_SENSOR_ATTR_TEMP(13, 12),
5678 THERMAL_SENSOR_ATTR_TEMP(14, 13),
5679 THERMAL_SENSOR_ATTR_TEMP(15, 14),
5680 THERMAL_SENSOR_ATTR_TEMP(16, 15),
5681 };
5682
5683 #define THERMAL_ATTRS(X) \
5684 &sensor_dev_attr_thermal_temp_input[X].dev_attr.attr
5685
5686 static struct attribute *thermal_temp_input_attr[] = {
5687 THERMAL_ATTRS(8),
5688 THERMAL_ATTRS(9),
5689 THERMAL_ATTRS(10),
5690 THERMAL_ATTRS(11),
5691 THERMAL_ATTRS(12),
5692 THERMAL_ATTRS(13),
5693 THERMAL_ATTRS(14),
5694 THERMAL_ATTRS(15),
5695 THERMAL_ATTRS(0),
5696 THERMAL_ATTRS(1),
5697 THERMAL_ATTRS(2),
5698 THERMAL_ATTRS(3),
5699 THERMAL_ATTRS(4),
5700 THERMAL_ATTRS(5),
5701 THERMAL_ATTRS(6),
5702 THERMAL_ATTRS(7),
5703 NULL
5704 };
5705
5706 static const struct attribute_group thermal_temp_input16_group = {
5707 .attrs = thermal_temp_input_attr
5708 };
5709
5710 static const struct attribute_group thermal_temp_input8_group = {
5711 .attrs = &thermal_temp_input_attr[8]
5712 };
5713
5714 #undef THERMAL_SENSOR_ATTR_TEMP
5715 #undef THERMAL_ATTRS
5716
5717 /* --------------------------------------------------------------------- */
5718
5719 static int __init thermal_init(struct ibm_init_struct *iibm)
5720 {
5721 u8 t, ta1, ta2;
5722 int i;
5723 int acpi_tmp7;
5724 int res;
5725
5726 vdbg_printk(TPACPI_DBG_INIT, "initializing thermal subdriver\n");
5727
5728 acpi_tmp7 = acpi_evalf(ec_handle, NULL, "TMP7", "qv");
5729
5730 if (thinkpad_id.ec_model) {
5731 /*
5732 * Direct EC access mode: sensors at registers
5733 * 0x78-0x7F, 0xC0-0xC7. Registers return 0x00 for
5734 * non-implemented, thermal sensors return 0x80 when
5735 * not available
5736 */
5737
5738 ta1 = ta2 = 0;
5739 for (i = 0; i < 8; i++) {
5740 if (acpi_ec_read(TP_EC_THERMAL_TMP0 + i, &t)) {
5741 ta1 |= t;
5742 } else {
5743 ta1 = 0;
5744 break;
5745 }
5746 if (acpi_ec_read(TP_EC_THERMAL_TMP8 + i, &t)) {
5747 ta2 |= t;
5748 } else {
5749 ta1 = 0;
5750 break;
5751 }
5752 }
5753 if (ta1 == 0) {
5754 /* This is sheer paranoia, but we handle it anyway */
5755 if (acpi_tmp7) {
5756 pr_err("ThinkPad ACPI EC access misbehaving, "
5757 "falling back to ACPI TMPx access "
5758 "mode\n");
5759 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
5760 } else {
5761 pr_err("ThinkPad ACPI EC access misbehaving, "
5762 "disabling thermal sensors access\n");
5763 thermal_read_mode = TPACPI_THERMAL_NONE;
5764 }
5765 } else {
5766 thermal_read_mode =
5767 (ta2 != 0) ?
5768 TPACPI_THERMAL_TPEC_16 : TPACPI_THERMAL_TPEC_8;
5769 }
5770 } else if (acpi_tmp7) {
5771 if (tpacpi_is_ibm() &&
5772 acpi_evalf(ec_handle, NULL, "UPDT", "qv")) {
5773 /* 600e/x, 770e, 770x */
5774 thermal_read_mode = TPACPI_THERMAL_ACPI_UPDT;
5775 } else {
5776 /* IBM/LENOVO DSDT EC.TMPx access, max 8 sensors */
5777 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
5778 }
5779 } else {
5780 /* temperatures not supported on 570, G4x, R30, R31, R32 */
5781 thermal_read_mode = TPACPI_THERMAL_NONE;
5782 }
5783
5784 vdbg_printk(TPACPI_DBG_INIT, "thermal is %s, mode %d\n",
5785 str_supported(thermal_read_mode != TPACPI_THERMAL_NONE),
5786 thermal_read_mode);
5787
5788 switch (thermal_read_mode) {
5789 case TPACPI_THERMAL_TPEC_16:
5790 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
5791 &thermal_temp_input16_group);
5792 if (res)
5793 return res;
5794 break;
5795 case TPACPI_THERMAL_TPEC_8:
5796 case TPACPI_THERMAL_ACPI_TMP07:
5797 case TPACPI_THERMAL_ACPI_UPDT:
5798 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
5799 &thermal_temp_input8_group);
5800 if (res)
5801 return res;
5802 break;
5803 case TPACPI_THERMAL_NONE:
5804 default:
5805 return 1;
5806 }
5807
5808 return 0;
5809 }
5810
5811 static void thermal_exit(void)
5812 {
5813 switch (thermal_read_mode) {
5814 case TPACPI_THERMAL_TPEC_16:
5815 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
5816 &thermal_temp_input16_group);
5817 break;
5818 case TPACPI_THERMAL_TPEC_8:
5819 case TPACPI_THERMAL_ACPI_TMP07:
5820 case TPACPI_THERMAL_ACPI_UPDT:
5821 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
5822 &thermal_temp_input8_group);
5823 break;
5824 case TPACPI_THERMAL_NONE:
5825 default:
5826 break;
5827 }
5828 }
5829
5830 static int thermal_read(struct seq_file *m)
5831 {
5832 int n, i;
5833 struct ibm_thermal_sensors_struct t;
5834
5835 n = thermal_get_sensors(&t);
5836 if (unlikely(n < 0))
5837 return n;
5838
5839 seq_printf(m, "temperatures:\t");
5840
5841 if (n > 0) {
5842 for (i = 0; i < (n - 1); i++)
5843 seq_printf(m, "%d ", t.temp[i] / 1000);
5844 seq_printf(m, "%d\n", t.temp[i] / 1000);
5845 } else
5846 seq_printf(m, "not supported\n");
5847
5848 return 0;
5849 }
5850
5851 static struct ibm_struct thermal_driver_data = {
5852 .name = "thermal",
5853 .read = thermal_read,
5854 .exit = thermal_exit,
5855 };
5856
5857 /*************************************************************************
5858 * Backlight/brightness subdriver
5859 */
5860
5861 #define TPACPI_BACKLIGHT_DEV_NAME "thinkpad_screen"
5862
5863 /*
5864 * ThinkPads can read brightness from two places: EC HBRV (0x31), or
5865 * CMOS NVRAM byte 0x5E, bits 0-3.
5866 *
5867 * EC HBRV (0x31) has the following layout
5868 * Bit 7: unknown function
5869 * Bit 6: unknown function
5870 * Bit 5: Z: honour scale changes, NZ: ignore scale changes
5871 * Bit 4: must be set to zero to avoid problems
5872 * Bit 3-0: backlight brightness level
5873 *
5874 * brightness_get_raw returns status data in the HBRV layout
5875 *
5876 * WARNING: The X61 has been verified to use HBRV for something else, so
5877 * this should be used _only_ on IBM ThinkPads, and maybe with some careful
5878 * testing on the very early *60 Lenovo models...
5879 */
5880
5881 enum {
5882 TP_EC_BACKLIGHT = 0x31,
5883
5884 /* TP_EC_BACKLIGHT bitmasks */
5885 TP_EC_BACKLIGHT_LVLMSK = 0x1F,
5886 TP_EC_BACKLIGHT_CMDMSK = 0xE0,
5887 TP_EC_BACKLIGHT_MAPSW = 0x20,
5888 };
5889
5890 enum tpacpi_brightness_access_mode {
5891 TPACPI_BRGHT_MODE_AUTO = 0, /* Not implemented yet */
5892 TPACPI_BRGHT_MODE_EC, /* EC control */
5893 TPACPI_BRGHT_MODE_UCMS_STEP, /* UCMS step-based control */
5894 TPACPI_BRGHT_MODE_ECNVRAM, /* EC control w/ NVRAM store */
5895 TPACPI_BRGHT_MODE_MAX
5896 };
5897
5898 static struct backlight_device *ibm_backlight_device;
5899
5900 static enum tpacpi_brightness_access_mode brightness_mode =
5901 TPACPI_BRGHT_MODE_MAX;
5902
5903 static unsigned int brightness_enable = 2; /* 2 = auto, 0 = no, 1 = yes */
5904
5905 static struct mutex brightness_mutex;
5906
5907 /* NVRAM brightness access,
5908 * call with brightness_mutex held! */
5909 static unsigned int tpacpi_brightness_nvram_get(void)
5910 {
5911 u8 lnvram;
5912
5913 lnvram = (nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS)
5914 & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
5915 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
5916 lnvram &= bright_maxlvl;
5917
5918 return lnvram;
5919 }
5920
5921 static void tpacpi_brightness_checkpoint_nvram(void)
5922 {
5923 u8 lec = 0;
5924 u8 b_nvram;
5925
5926 if (brightness_mode != TPACPI_BRGHT_MODE_ECNVRAM)
5927 return;
5928
5929 vdbg_printk(TPACPI_DBG_BRGHT,
5930 "trying to checkpoint backlight level to NVRAM...\n");
5931
5932 if (mutex_lock_killable(&brightness_mutex) < 0)
5933 return;
5934
5935 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
5936 goto unlock;
5937 lec &= TP_EC_BACKLIGHT_LVLMSK;
5938 b_nvram = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS);
5939
5940 if (lec != ((b_nvram & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
5941 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS)) {
5942 /* NVRAM needs update */
5943 b_nvram &= ~(TP_NVRAM_MASK_LEVEL_BRIGHTNESS <<
5944 TP_NVRAM_POS_LEVEL_BRIGHTNESS);
5945 b_nvram |= lec;
5946 nvram_write_byte(b_nvram, TP_NVRAM_ADDR_BRIGHTNESS);
5947 dbg_printk(TPACPI_DBG_BRGHT,
5948 "updated NVRAM backlight level to %u (0x%02x)\n",
5949 (unsigned int) lec, (unsigned int) b_nvram);
5950 } else
5951 vdbg_printk(TPACPI_DBG_BRGHT,
5952 "NVRAM backlight level already is %u (0x%02x)\n",
5953 (unsigned int) lec, (unsigned int) b_nvram);
5954
5955 unlock:
5956 mutex_unlock(&brightness_mutex);
5957 }
5958
5959
5960 /* call with brightness_mutex held! */
5961 static int tpacpi_brightness_get_raw(int *status)
5962 {
5963 u8 lec = 0;
5964
5965 switch (brightness_mode) {
5966 case TPACPI_BRGHT_MODE_UCMS_STEP:
5967 *status = tpacpi_brightness_nvram_get();
5968 return 0;
5969 case TPACPI_BRGHT_MODE_EC:
5970 case TPACPI_BRGHT_MODE_ECNVRAM:
5971 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
5972 return -EIO;
5973 *status = lec;
5974 return 0;
5975 default:
5976 return -ENXIO;
5977 }
5978 }
5979
5980 /* call with brightness_mutex held! */
5981 /* do NOT call with illegal backlight level value */
5982 static int tpacpi_brightness_set_ec(unsigned int value)
5983 {
5984 u8 lec = 0;
5985
5986 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
5987 return -EIO;
5988
5989 if (unlikely(!acpi_ec_write(TP_EC_BACKLIGHT,
5990 (lec & TP_EC_BACKLIGHT_CMDMSK) |
5991 (value & TP_EC_BACKLIGHT_LVLMSK))))
5992 return -EIO;
5993
5994 return 0;
5995 }
5996
5997 /* call with brightness_mutex held! */
5998 static int tpacpi_brightness_set_ucmsstep(unsigned int value)
5999 {
6000 int cmos_cmd, inc;
6001 unsigned int current_value, i;
6002
6003 current_value = tpacpi_brightness_nvram_get();
6004
6005 if (value == current_value)
6006 return 0;
6007
6008 cmos_cmd = (value > current_value) ?
6009 TP_CMOS_BRIGHTNESS_UP :
6010 TP_CMOS_BRIGHTNESS_DOWN;
6011 inc = (value > current_value) ? 1 : -1;
6012
6013 for (i = current_value; i != value; i += inc)
6014 if (issue_thinkpad_cmos_command(cmos_cmd))
6015 return -EIO;
6016
6017 return 0;
6018 }
6019
6020 /* May return EINTR which can always be mapped to ERESTARTSYS */
6021 static int brightness_set(unsigned int value)
6022 {
6023 int res;
6024
6025 if (value > bright_maxlvl || value < 0)
6026 return -EINVAL;
6027
6028 vdbg_printk(TPACPI_DBG_BRGHT,
6029 "set backlight level to %d\n", value);
6030
6031 res = mutex_lock_killable(&brightness_mutex);
6032 if (res < 0)
6033 return res;
6034
6035 switch (brightness_mode) {
6036 case TPACPI_BRGHT_MODE_EC:
6037 case TPACPI_BRGHT_MODE_ECNVRAM:
6038 res = tpacpi_brightness_set_ec(value);
6039 break;
6040 case TPACPI_BRGHT_MODE_UCMS_STEP:
6041 res = tpacpi_brightness_set_ucmsstep(value);
6042 break;
6043 default:
6044 res = -ENXIO;
6045 }
6046
6047 mutex_unlock(&brightness_mutex);
6048 return res;
6049 }
6050
6051 /* sysfs backlight class ----------------------------------------------- */
6052
6053 static int brightness_update_status(struct backlight_device *bd)
6054 {
6055 unsigned int level =
6056 (bd->props.fb_blank == FB_BLANK_UNBLANK &&
6057 bd->props.power == FB_BLANK_UNBLANK) ?
6058 bd->props.brightness : 0;
6059
6060 dbg_printk(TPACPI_DBG_BRGHT,
6061 "backlight: attempt to set level to %d\n",
6062 level);
6063
6064 /* it is the backlight class's job (caller) to handle
6065 * EINTR and other errors properly */
6066 return brightness_set(level);
6067 }
6068
6069 static int brightness_get(struct backlight_device *bd)
6070 {
6071 int status, res;
6072
6073 res = mutex_lock_killable(&brightness_mutex);
6074 if (res < 0)
6075 return 0;
6076
6077 res = tpacpi_brightness_get_raw(&status);
6078
6079 mutex_unlock(&brightness_mutex);
6080
6081 if (res < 0)
6082 return 0;
6083
6084 return status & TP_EC_BACKLIGHT_LVLMSK;
6085 }
6086
6087 static void tpacpi_brightness_notify_change(void)
6088 {
6089 backlight_force_update(ibm_backlight_device,
6090 BACKLIGHT_UPDATE_HOTKEY);
6091 }
6092
6093 static const struct backlight_ops ibm_backlight_data = {
6094 .get_brightness = brightness_get,
6095 .update_status = brightness_update_status,
6096 };
6097
6098 /* --------------------------------------------------------------------- */
6099
6100 /*
6101 * Call _BCL method of video device. On some ThinkPads this will
6102 * switch the firmware to the ACPI brightness control mode.
6103 */
6104
6105 static int __init tpacpi_query_bcl_levels(acpi_handle handle)
6106 {
6107 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
6108 union acpi_object *obj;
6109 int rc;
6110
6111 if (ACPI_SUCCESS(acpi_evaluate_object(handle, "_BCL", NULL, &buffer))) {
6112 obj = (union acpi_object *)buffer.pointer;
6113 if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) {
6114 pr_err("Unknown _BCL data, please report this to %s\n",
6115 TPACPI_MAIL);
6116 rc = 0;
6117 } else {
6118 rc = obj->package.count;
6119 }
6120 } else {
6121 return 0;
6122 }
6123
6124 kfree(buffer.pointer);
6125 return rc;
6126 }
6127
6128
6129 /*
6130 * Returns 0 (no ACPI _BCL or _BCL invalid), or size of brightness map
6131 */
6132 static unsigned int __init tpacpi_check_std_acpi_brightness_support(void)
6133 {
6134 acpi_handle video_device;
6135 int bcl_levels = 0;
6136
6137 tpacpi_acpi_handle_locate("video", ACPI_VIDEO_HID, &video_device);
6138 if (video_device)
6139 bcl_levels = tpacpi_query_bcl_levels(video_device);
6140
6141 tp_features.bright_acpimode = (bcl_levels > 0);
6142
6143 return (bcl_levels > 2) ? (bcl_levels - 2) : 0;
6144 }
6145
6146 /*
6147 * These are only useful for models that have only one possibility
6148 * of GPU. If the BIOS model handles both ATI and Intel, don't use
6149 * these quirks.
6150 */
6151 #define TPACPI_BRGHT_Q_NOEC 0x0001 /* Must NOT use EC HBRV */
6152 #define TPACPI_BRGHT_Q_EC 0x0002 /* Should or must use EC HBRV */
6153 #define TPACPI_BRGHT_Q_ASK 0x8000 /* Ask for user report */
6154
6155 static const struct tpacpi_quirk brightness_quirk_table[] __initconst = {
6156 /* Models with ATI GPUs known to require ECNVRAM mode */
6157 TPACPI_Q_IBM('1', 'Y', TPACPI_BRGHT_Q_EC), /* T43/p ATI */
6158
6159 /* Models with ATI GPUs that can use ECNVRAM */
6160 TPACPI_Q_IBM('1', 'R', TPACPI_BRGHT_Q_EC), /* R50,51 T40-42 */
6161 TPACPI_Q_IBM('1', 'Q', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
6162 TPACPI_Q_IBM('7', '6', TPACPI_BRGHT_Q_EC), /* R52 */
6163 TPACPI_Q_IBM('7', '8', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
6164
6165 /* Models with Intel Extreme Graphics 2 */
6166 TPACPI_Q_IBM('1', 'U', TPACPI_BRGHT_Q_NOEC), /* X40 */
6167 TPACPI_Q_IBM('1', 'V', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
6168 TPACPI_Q_IBM('1', 'W', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
6169
6170 /* Models with Intel GMA900 */
6171 TPACPI_Q_IBM('7', '0', TPACPI_BRGHT_Q_NOEC), /* T43, R52 */
6172 TPACPI_Q_IBM('7', '4', TPACPI_BRGHT_Q_NOEC), /* X41 */
6173 TPACPI_Q_IBM('7', '5', TPACPI_BRGHT_Q_NOEC), /* X41 Tablet */
6174 };
6175
6176 /*
6177 * Returns < 0 for error, otherwise sets tp_features.bright_*
6178 * and bright_maxlvl.
6179 */
6180 static void __init tpacpi_detect_brightness_capabilities(void)
6181 {
6182 unsigned int b;
6183
6184 vdbg_printk(TPACPI_DBG_INIT,
6185 "detecting firmware brightness interface capabilities\n");
6186
6187 /* we could run a quirks check here (same table used by
6188 * brightness_init) if needed */
6189
6190 /*
6191 * We always attempt to detect acpi support, so as to switch
6192 * Lenovo Vista BIOS to ACPI brightness mode even if we are not
6193 * going to publish a backlight interface
6194 */
6195 b = tpacpi_check_std_acpi_brightness_support();
6196 switch (b) {
6197 case 16:
6198 bright_maxlvl = 15;
6199 pr_info("detected a 16-level brightness capable ThinkPad\n");
6200 break;
6201 case 8:
6202 case 0:
6203 bright_maxlvl = 7;
6204 pr_info("detected a 8-level brightness capable ThinkPad\n");
6205 break;
6206 default:
6207 pr_err("Unsupported brightness interface, "
6208 "please contact %s\n", TPACPI_MAIL);
6209 tp_features.bright_unkfw = 1;
6210 bright_maxlvl = b - 1;
6211 }
6212 }
6213
6214 static int __init brightness_init(struct ibm_init_struct *iibm)
6215 {
6216 struct backlight_properties props;
6217 int b;
6218 unsigned long quirks;
6219
6220 vdbg_printk(TPACPI_DBG_INIT, "initializing brightness subdriver\n");
6221
6222 mutex_init(&brightness_mutex);
6223
6224 quirks = tpacpi_check_quirks(brightness_quirk_table,
6225 ARRAY_SIZE(brightness_quirk_table));
6226
6227 /* tpacpi_detect_brightness_capabilities() must have run already */
6228
6229 /* if it is unknown, we don't handle it: it wouldn't be safe */
6230 if (tp_features.bright_unkfw)
6231 return 1;
6232
6233 if (!brightness_enable) {
6234 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT,
6235 "brightness support disabled by "
6236 "module parameter\n");
6237 return 1;
6238 }
6239
6240 if (acpi_video_backlight_support()) {
6241 if (brightness_enable > 1) {
6242 pr_info("Standard ACPI backlight interface "
6243 "available, not loading native one\n");
6244 return 1;
6245 } else if (brightness_enable == 1) {
6246 pr_warn("Cannot enable backlight brightness support, "
6247 "ACPI is already handling it. Refer to the "
6248 "acpi_backlight kernel parameter.\n");
6249 return 1;
6250 }
6251 } else if (tp_features.bright_acpimode && brightness_enable > 1) {
6252 pr_notice("Standard ACPI backlight interface not "
6253 "available, thinkpad_acpi native "
6254 "brightness control enabled\n");
6255 }
6256
6257 /*
6258 * Check for module parameter bogosity, note that we
6259 * init brightness_mode to TPACPI_BRGHT_MODE_MAX in order to be
6260 * able to detect "unspecified"
6261 */
6262 if (brightness_mode > TPACPI_BRGHT_MODE_MAX)
6263 return -EINVAL;
6264
6265 /* TPACPI_BRGHT_MODE_AUTO not implemented yet, just use default */
6266 if (brightness_mode == TPACPI_BRGHT_MODE_AUTO ||
6267 brightness_mode == TPACPI_BRGHT_MODE_MAX) {
6268 if (quirks & TPACPI_BRGHT_Q_EC)
6269 brightness_mode = TPACPI_BRGHT_MODE_ECNVRAM;
6270 else
6271 brightness_mode = TPACPI_BRGHT_MODE_UCMS_STEP;
6272
6273 dbg_printk(TPACPI_DBG_BRGHT,
6274 "driver auto-selected brightness_mode=%d\n",
6275 brightness_mode);
6276 }
6277
6278 /* Safety */
6279 if (!tpacpi_is_ibm() &&
6280 (brightness_mode == TPACPI_BRGHT_MODE_ECNVRAM ||
6281 brightness_mode == TPACPI_BRGHT_MODE_EC))
6282 return -EINVAL;
6283
6284 if (tpacpi_brightness_get_raw(&b) < 0)
6285 return 1;
6286
6287 memset(&props, 0, sizeof(struct backlight_properties));
6288 props.type = BACKLIGHT_PLATFORM;
6289 props.max_brightness = bright_maxlvl;
6290 props.brightness = b & TP_EC_BACKLIGHT_LVLMSK;
6291 ibm_backlight_device = backlight_device_register(TPACPI_BACKLIGHT_DEV_NAME,
6292 NULL, NULL,
6293 &ibm_backlight_data,
6294 &props);
6295 if (IS_ERR(ibm_backlight_device)) {
6296 int rc = PTR_ERR(ibm_backlight_device);
6297 ibm_backlight_device = NULL;
6298 pr_err("Could not register backlight device\n");
6299 return rc;
6300 }
6301 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT,
6302 "brightness is supported\n");
6303
6304 if (quirks & TPACPI_BRGHT_Q_ASK) {
6305 pr_notice("brightness: will use unverified default: "
6306 "brightness_mode=%d\n", brightness_mode);
6307 pr_notice("brightness: please report to %s whether it works well "
6308 "or not on your ThinkPad\n", TPACPI_MAIL);
6309 }
6310
6311 /* Added by mistake in early 2007. Probably useless, but it could
6312 * be working around some unknown firmware problem where the value
6313 * read at startup doesn't match the real hardware state... so leave
6314 * it in place just in case */
6315 backlight_update_status(ibm_backlight_device);
6316
6317 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT,
6318 "brightness: registering brightness hotkeys "
6319 "as change notification\n");
6320 tpacpi_hotkey_driver_mask_set(hotkey_driver_mask
6321 | TP_ACPI_HKEY_BRGHTUP_MASK
6322 | TP_ACPI_HKEY_BRGHTDWN_MASK);
6323 return 0;
6324 }
6325
6326 static void brightness_suspend(pm_message_t state)
6327 {
6328 tpacpi_brightness_checkpoint_nvram();
6329 }
6330
6331 static void brightness_shutdown(void)
6332 {
6333 tpacpi_brightness_checkpoint_nvram();
6334 }
6335
6336 static void brightness_exit(void)
6337 {
6338 if (ibm_backlight_device) {
6339 vdbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_BRGHT,
6340 "calling backlight_device_unregister()\n");
6341 backlight_device_unregister(ibm_backlight_device);
6342 }
6343
6344 tpacpi_brightness_checkpoint_nvram();
6345 }
6346
6347 static int brightness_read(struct seq_file *m)
6348 {
6349 int level;
6350
6351 level = brightness_get(NULL);
6352 if (level < 0) {
6353 seq_printf(m, "level:\t\tunreadable\n");
6354 } else {
6355 seq_printf(m, "level:\t\t%d\n", level);
6356 seq_printf(m, "commands:\tup, down\n");
6357 seq_printf(m, "commands:\tlevel <level> (<level> is 0-%d)\n",
6358 bright_maxlvl);
6359 }
6360
6361 return 0;
6362 }
6363
6364 static int brightness_write(char *buf)
6365 {
6366 int level;
6367 int rc;
6368 char *cmd;
6369
6370 level = brightness_get(NULL);
6371 if (level < 0)
6372 return level;
6373
6374 while ((cmd = next_cmd(&buf))) {
6375 if (strlencmp(cmd, "up") == 0) {
6376 if (level < bright_maxlvl)
6377 level++;
6378 } else if (strlencmp(cmd, "down") == 0) {
6379 if (level > 0)
6380 level--;
6381 } else if (sscanf(cmd, "level %d", &level) == 1 &&
6382 level >= 0 && level <= bright_maxlvl) {
6383 /* new level set */
6384 } else
6385 return -EINVAL;
6386 }
6387
6388 tpacpi_disclose_usertask("procfs brightness",
6389 "set level to %d\n", level);
6390
6391 /*
6392 * Now we know what the final level should be, so we try to set it.
6393 * Doing it this way makes the syscall restartable in case of EINTR
6394 */
6395 rc = brightness_set(level);
6396 if (!rc && ibm_backlight_device)
6397 backlight_force_update(ibm_backlight_device,
6398 BACKLIGHT_UPDATE_SYSFS);
6399 return (rc == -EINTR)? -ERESTARTSYS : rc;
6400 }
6401
6402 static struct ibm_struct brightness_driver_data = {
6403 .name = "brightness",
6404 .read = brightness_read,
6405 .write = brightness_write,
6406 .exit = brightness_exit,
6407 .suspend = brightness_suspend,
6408 .shutdown = brightness_shutdown,
6409 };
6410
6411 /*************************************************************************
6412 * Volume subdriver
6413 */
6414
6415 /*
6416 * IBM ThinkPads have a simple volume controller with MUTE gating.
6417 * Very early Lenovo ThinkPads follow the IBM ThinkPad spec.
6418 *
6419 * Since the *61 series (and probably also the later *60 series), Lenovo
6420 * ThinkPads only implement the MUTE gate.
6421 *
6422 * EC register 0x30
6423 * Bit 6: MUTE (1 mutes sound)
6424 * Bit 3-0: Volume
6425 * Other bits should be zero as far as we know.
6426 *
6427 * This is also stored in CMOS NVRAM, byte 0x60, bit 6 (MUTE), and
6428 * bits 3-0 (volume). Other bits in NVRAM may have other functions,
6429 * such as bit 7 which is used to detect repeated presses of MUTE,
6430 * and we leave them unchanged.
6431 */
6432
6433 #ifdef CONFIG_THINKPAD_ACPI_ALSA_SUPPORT
6434
6435 #define TPACPI_ALSA_DRVNAME "ThinkPad EC"
6436 #define TPACPI_ALSA_SHRTNAME "ThinkPad Console Audio Control"
6437 #define TPACPI_ALSA_MIXERNAME TPACPI_ALSA_SHRTNAME
6438
6439 static int alsa_index = ~((1 << (SNDRV_CARDS - 3)) - 1); /* last three slots */
6440 static char *alsa_id = "ThinkPadEC";
6441 static int alsa_enable = SNDRV_DEFAULT_ENABLE1;
6442
6443 struct tpacpi_alsa_data {
6444 struct snd_card *card;
6445 struct snd_ctl_elem_id *ctl_mute_id;
6446 struct snd_ctl_elem_id *ctl_vol_id;
6447 };
6448
6449 static struct snd_card *alsa_card;
6450
6451 enum {
6452 TP_EC_AUDIO = 0x30,
6453
6454 /* TP_EC_AUDIO bits */
6455 TP_EC_AUDIO_MUTESW = 6,
6456
6457 /* TP_EC_AUDIO bitmasks */
6458 TP_EC_AUDIO_LVL_MSK = 0x0F,
6459 TP_EC_AUDIO_MUTESW_MSK = (1 << TP_EC_AUDIO_MUTESW),
6460
6461 /* Maximum volume */
6462 TP_EC_VOLUME_MAX = 14,
6463 };
6464
6465 enum tpacpi_volume_access_mode {
6466 TPACPI_VOL_MODE_AUTO = 0, /* Not implemented yet */
6467 TPACPI_VOL_MODE_EC, /* Pure EC control */
6468 TPACPI_VOL_MODE_UCMS_STEP, /* UCMS step-based control: N/A */
6469 TPACPI_VOL_MODE_ECNVRAM, /* EC control w/ NVRAM store */
6470 TPACPI_VOL_MODE_MAX
6471 };
6472
6473 enum tpacpi_volume_capabilities {
6474 TPACPI_VOL_CAP_AUTO = 0, /* Use white/blacklist */
6475 TPACPI_VOL_CAP_VOLMUTE, /* Output vol and mute */
6476 TPACPI_VOL_CAP_MUTEONLY, /* Output mute only */
6477 TPACPI_VOL_CAP_MAX
6478 };
6479
6480 static enum tpacpi_volume_access_mode volume_mode =
6481 TPACPI_VOL_MODE_MAX;
6482
6483 static enum tpacpi_volume_capabilities volume_capabilities;
6484 static int volume_control_allowed;
6485
6486 /*
6487 * Used to syncronize writers to TP_EC_AUDIO and
6488 * TP_NVRAM_ADDR_MIXER, as we need to do read-modify-write
6489 */
6490 static struct mutex volume_mutex;
6491
6492 static void tpacpi_volume_checkpoint_nvram(void)
6493 {
6494 u8 lec = 0;
6495 u8 b_nvram;
6496 u8 ec_mask;
6497
6498 if (volume_mode != TPACPI_VOL_MODE_ECNVRAM)
6499 return;
6500 if (!volume_control_allowed)
6501 return;
6502
6503 vdbg_printk(TPACPI_DBG_MIXER,
6504 "trying to checkpoint mixer state to NVRAM...\n");
6505
6506 if (tp_features.mixer_no_level_control)
6507 ec_mask = TP_EC_AUDIO_MUTESW_MSK;
6508 else
6509 ec_mask = TP_EC_AUDIO_MUTESW_MSK | TP_EC_AUDIO_LVL_MSK;
6510
6511 if (mutex_lock_killable(&volume_mutex) < 0)
6512 return;
6513
6514 if (unlikely(!acpi_ec_read(TP_EC_AUDIO, &lec)))
6515 goto unlock;
6516 lec &= ec_mask;
6517 b_nvram = nvram_read_byte(TP_NVRAM_ADDR_MIXER);
6518
6519 if (lec != (b_nvram & ec_mask)) {
6520 /* NVRAM needs update */
6521 b_nvram &= ~ec_mask;
6522 b_nvram |= lec;
6523 nvram_write_byte(b_nvram, TP_NVRAM_ADDR_MIXER);
6524 dbg_printk(TPACPI_DBG_MIXER,
6525 "updated NVRAM mixer status to 0x%02x (0x%02x)\n",
6526 (unsigned int) lec, (unsigned int) b_nvram);
6527 } else {
6528 vdbg_printk(TPACPI_DBG_MIXER,
6529 "NVRAM mixer status already is 0x%02x (0x%02x)\n",
6530 (unsigned int) lec, (unsigned int) b_nvram);
6531 }
6532
6533 unlock:
6534 mutex_unlock(&volume_mutex);
6535 }
6536
6537 static int volume_get_status_ec(u8 *status)
6538 {
6539 u8 s;
6540
6541 if (!acpi_ec_read(TP_EC_AUDIO, &s))
6542 return -EIO;
6543
6544 *status = s;
6545
6546 dbg_printk(TPACPI_DBG_MIXER, "status 0x%02x\n", s);
6547
6548 return 0;
6549 }
6550
6551 static int volume_get_status(u8 *status)
6552 {
6553 return volume_get_status_ec(status);
6554 }
6555
6556 static int volume_set_status_ec(const u8 status)
6557 {
6558 if (!acpi_ec_write(TP_EC_AUDIO, status))
6559 return -EIO;
6560
6561 dbg_printk(TPACPI_DBG_MIXER, "set EC mixer to 0x%02x\n", status);
6562
6563 return 0;
6564 }
6565
6566 static int volume_set_status(const u8 status)
6567 {
6568 return volume_set_status_ec(status);
6569 }
6570
6571 /* returns < 0 on error, 0 on no change, 1 on change */
6572 static int __volume_set_mute_ec(const bool mute)
6573 {
6574 int rc;
6575 u8 s, n;
6576
6577 if (mutex_lock_killable(&volume_mutex) < 0)
6578 return -EINTR;
6579
6580 rc = volume_get_status_ec(&s);
6581 if (rc)
6582 goto unlock;
6583
6584 n = (mute) ? s | TP_EC_AUDIO_MUTESW_MSK :
6585 s & ~TP_EC_AUDIO_MUTESW_MSK;
6586
6587 if (n != s) {
6588 rc = volume_set_status_ec(n);
6589 if (!rc)
6590 rc = 1;
6591 }
6592
6593 unlock:
6594 mutex_unlock(&volume_mutex);
6595 return rc;
6596 }
6597
6598 static int volume_alsa_set_mute(const bool mute)
6599 {
6600 dbg_printk(TPACPI_DBG_MIXER, "ALSA: trying to %smute\n",
6601 (mute) ? "" : "un");
6602 return __volume_set_mute_ec(mute);
6603 }
6604
6605 static int volume_set_mute(const bool mute)
6606 {
6607 int rc;
6608
6609 dbg_printk(TPACPI_DBG_MIXER, "trying to %smute\n",
6610 (mute) ? "" : "un");
6611
6612 rc = __volume_set_mute_ec(mute);
6613 return (rc < 0) ? rc : 0;
6614 }
6615
6616 /* returns < 0 on error, 0 on no change, 1 on change */
6617 static int __volume_set_volume_ec(const u8 vol)
6618 {
6619 int rc;
6620 u8 s, n;
6621
6622 if (vol > TP_EC_VOLUME_MAX)
6623 return -EINVAL;
6624
6625 if (mutex_lock_killable(&volume_mutex) < 0)
6626 return -EINTR;
6627
6628 rc = volume_get_status_ec(&s);
6629 if (rc)
6630 goto unlock;
6631
6632 n = (s & ~TP_EC_AUDIO_LVL_MSK) | vol;
6633
6634 if (n != s) {
6635 rc = volume_set_status_ec(n);
6636 if (!rc)
6637 rc = 1;
6638 }
6639
6640 unlock:
6641 mutex_unlock(&volume_mutex);
6642 return rc;
6643 }
6644
6645 static int volume_alsa_set_volume(const u8 vol)
6646 {
6647 dbg_printk(TPACPI_DBG_MIXER,
6648 "ALSA: trying to set volume level to %hu\n", vol);
6649 return __volume_set_volume_ec(vol);
6650 }
6651
6652 static void volume_alsa_notify_change(void)
6653 {
6654 struct tpacpi_alsa_data *d;
6655
6656 if (alsa_card && alsa_card->private_data) {
6657 d = alsa_card->private_data;
6658 if (d->ctl_mute_id)
6659 snd_ctl_notify(alsa_card,
6660 SNDRV_CTL_EVENT_MASK_VALUE,
6661 d->ctl_mute_id);
6662 if (d->ctl_vol_id)
6663 snd_ctl_notify(alsa_card,
6664 SNDRV_CTL_EVENT_MASK_VALUE,
6665 d->ctl_vol_id);
6666 }
6667 }
6668
6669 static int volume_alsa_vol_info(struct snd_kcontrol *kcontrol,
6670 struct snd_ctl_elem_info *uinfo)
6671 {
6672 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
6673 uinfo->count = 1;
6674 uinfo->value.integer.min = 0;
6675 uinfo->value.integer.max = TP_EC_VOLUME_MAX;
6676 return 0;
6677 }
6678
6679 static int volume_alsa_vol_get(struct snd_kcontrol *kcontrol,
6680 struct snd_ctl_elem_value *ucontrol)
6681 {
6682 u8 s;
6683 int rc;
6684
6685 rc = volume_get_status(&s);
6686 if (rc < 0)
6687 return rc;
6688
6689 ucontrol->value.integer.value[0] = s & TP_EC_AUDIO_LVL_MSK;
6690 return 0;
6691 }
6692
6693 static int volume_alsa_vol_put(struct snd_kcontrol *kcontrol,
6694 struct snd_ctl_elem_value *ucontrol)
6695 {
6696 tpacpi_disclose_usertask("ALSA", "set volume to %ld\n",
6697 ucontrol->value.integer.value[0]);
6698 return volume_alsa_set_volume(ucontrol->value.integer.value[0]);
6699 }
6700
6701 #define volume_alsa_mute_info snd_ctl_boolean_mono_info
6702
6703 static int volume_alsa_mute_get(struct snd_kcontrol *kcontrol,
6704 struct snd_ctl_elem_value *ucontrol)
6705 {
6706 u8 s;
6707 int rc;
6708
6709 rc = volume_get_status(&s);
6710 if (rc < 0)
6711 return rc;
6712
6713 ucontrol->value.integer.value[0] =
6714 (s & TP_EC_AUDIO_MUTESW_MSK) ? 0 : 1;
6715 return 0;
6716 }
6717
6718 static int volume_alsa_mute_put(struct snd_kcontrol *kcontrol,
6719 struct snd_ctl_elem_value *ucontrol)
6720 {
6721 tpacpi_disclose_usertask("ALSA", "%smute\n",
6722 ucontrol->value.integer.value[0] ?
6723 "un" : "");
6724 return volume_alsa_set_mute(!ucontrol->value.integer.value[0]);
6725 }
6726
6727 static struct snd_kcontrol_new volume_alsa_control_vol __devinitdata = {
6728 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
6729 .name = "Console Playback Volume",
6730 .index = 0,
6731 .access = SNDRV_CTL_ELEM_ACCESS_READ,
6732 .info = volume_alsa_vol_info,
6733 .get = volume_alsa_vol_get,
6734 };
6735
6736 static struct snd_kcontrol_new volume_alsa_control_mute __devinitdata = {
6737 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
6738 .name = "Console Playback Switch",
6739 .index = 0,
6740 .access = SNDRV_CTL_ELEM_ACCESS_READ,
6741 .info = volume_alsa_mute_info,
6742 .get = volume_alsa_mute_get,
6743 };
6744
6745 static void volume_suspend(pm_message_t state)
6746 {
6747 tpacpi_volume_checkpoint_nvram();
6748 }
6749
6750 static void volume_resume(void)
6751 {
6752 volume_alsa_notify_change();
6753 }
6754
6755 static void volume_shutdown(void)
6756 {
6757 tpacpi_volume_checkpoint_nvram();
6758 }
6759
6760 static void volume_exit(void)
6761 {
6762 if (alsa_card) {
6763 snd_card_free(alsa_card);
6764 alsa_card = NULL;
6765 }
6766
6767 tpacpi_volume_checkpoint_nvram();
6768 }
6769
6770 static int __init volume_create_alsa_mixer(void)
6771 {
6772 struct snd_card *card;
6773 struct tpacpi_alsa_data *data;
6774 struct snd_kcontrol *ctl_vol;
6775 struct snd_kcontrol *ctl_mute;
6776 int rc;
6777
6778 rc = snd_card_create(alsa_index, alsa_id, THIS_MODULE,
6779 sizeof(struct tpacpi_alsa_data), &card);
6780 if (rc < 0 || !card) {
6781 pr_err("Failed to create ALSA card structures: %d\n", rc);
6782 return 1;
6783 }
6784
6785 BUG_ON(!card->private_data);
6786 data = card->private_data;
6787 data->card = card;
6788
6789 strlcpy(card->driver, TPACPI_ALSA_DRVNAME,
6790 sizeof(card->driver));
6791 strlcpy(card->shortname, TPACPI_ALSA_SHRTNAME,
6792 sizeof(card->shortname));
6793 snprintf(card->mixername, sizeof(card->mixername), "ThinkPad EC %s",
6794 (thinkpad_id.ec_version_str) ?
6795 thinkpad_id.ec_version_str : "(unknown)");
6796 snprintf(card->longname, sizeof(card->longname),
6797 "%s at EC reg 0x%02x, fw %s", card->shortname, TP_EC_AUDIO,
6798 (thinkpad_id.ec_version_str) ?
6799 thinkpad_id.ec_version_str : "unknown");
6800
6801 if (volume_control_allowed) {
6802 volume_alsa_control_vol.put = volume_alsa_vol_put;
6803 volume_alsa_control_vol.access =
6804 SNDRV_CTL_ELEM_ACCESS_READWRITE;
6805
6806 volume_alsa_control_mute.put = volume_alsa_mute_put;
6807 volume_alsa_control_mute.access =
6808 SNDRV_CTL_ELEM_ACCESS_READWRITE;
6809 }
6810
6811 if (!tp_features.mixer_no_level_control) {
6812 ctl_vol = snd_ctl_new1(&volume_alsa_control_vol, NULL);
6813 rc = snd_ctl_add(card, ctl_vol);
6814 if (rc < 0) {
6815 pr_err("Failed to create ALSA volume control: %d\n",
6816 rc);
6817 goto err_exit;
6818 }
6819 data->ctl_vol_id = &ctl_vol->id;
6820 }
6821
6822 ctl_mute = snd_ctl_new1(&volume_alsa_control_mute, NULL);
6823 rc = snd_ctl_add(card, ctl_mute);
6824 if (rc < 0) {
6825 pr_err("Failed to create ALSA mute control: %d\n", rc);
6826 goto err_exit;
6827 }
6828 data->ctl_mute_id = &ctl_mute->id;
6829
6830 snd_card_set_dev(card, &tpacpi_pdev->dev);
6831 rc = snd_card_register(card);
6832 if (rc < 0) {
6833 pr_err("Failed to register ALSA card: %d\n", rc);
6834 goto err_exit;
6835 }
6836
6837 alsa_card = card;
6838 return 0;
6839
6840 err_exit:
6841 snd_card_free(card);
6842 return 1;
6843 }
6844
6845 #define TPACPI_VOL_Q_MUTEONLY 0x0001 /* Mute-only control available */
6846 #define TPACPI_VOL_Q_LEVEL 0x0002 /* Volume control available */
6847
6848 static const struct tpacpi_quirk volume_quirk_table[] __initconst = {
6849 /* Whitelist volume level on all IBM by default */
6850 { .vendor = PCI_VENDOR_ID_IBM,
6851 .bios = TPACPI_MATCH_ANY,
6852 .ec = TPACPI_MATCH_ANY,
6853 .quirks = TPACPI_VOL_Q_LEVEL },
6854
6855 /* Lenovo models with volume control (needs confirmation) */
6856 TPACPI_QEC_LNV('7', 'C', TPACPI_VOL_Q_LEVEL), /* R60/i */
6857 TPACPI_QEC_LNV('7', 'E', TPACPI_VOL_Q_LEVEL), /* R60e/i */
6858 TPACPI_QEC_LNV('7', '9', TPACPI_VOL_Q_LEVEL), /* T60/p */
6859 TPACPI_QEC_LNV('7', 'B', TPACPI_VOL_Q_LEVEL), /* X60/s */
6860 TPACPI_QEC_LNV('7', 'J', TPACPI_VOL_Q_LEVEL), /* X60t */
6861 TPACPI_QEC_LNV('7', '7', TPACPI_VOL_Q_LEVEL), /* Z60 */
6862 TPACPI_QEC_LNV('7', 'F', TPACPI_VOL_Q_LEVEL), /* Z61 */
6863
6864 /* Whitelist mute-only on all Lenovo by default */
6865 { .vendor = PCI_VENDOR_ID_LENOVO,
6866 .bios = TPACPI_MATCH_ANY,
6867 .ec = TPACPI_MATCH_ANY,
6868 .quirks = TPACPI_VOL_Q_MUTEONLY }
6869 };
6870
6871 static int __init volume_init(struct ibm_init_struct *iibm)
6872 {
6873 unsigned long quirks;
6874 int rc;
6875
6876 vdbg_printk(TPACPI_DBG_INIT, "initializing volume subdriver\n");
6877
6878 mutex_init(&volume_mutex);
6879
6880 /*
6881 * Check for module parameter bogosity, note that we
6882 * init volume_mode to TPACPI_VOL_MODE_MAX in order to be
6883 * able to detect "unspecified"
6884 */
6885 if (volume_mode > TPACPI_VOL_MODE_MAX)
6886 return -EINVAL;
6887
6888 if (volume_mode == TPACPI_VOL_MODE_UCMS_STEP) {
6889 pr_err("UCMS step volume mode not implemented, "
6890 "please contact %s\n", TPACPI_MAIL);
6891 return 1;
6892 }
6893
6894 if (volume_capabilities >= TPACPI_VOL_CAP_MAX)
6895 return -EINVAL;
6896
6897 /*
6898 * The ALSA mixer is our primary interface.
6899 * When disabled, don't install the subdriver at all
6900 */
6901 if (!alsa_enable) {
6902 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
6903 "ALSA mixer disabled by parameter, "
6904 "not loading volume subdriver...\n");
6905 return 1;
6906 }
6907
6908 quirks = tpacpi_check_quirks(volume_quirk_table,
6909 ARRAY_SIZE(volume_quirk_table));
6910
6911 switch (volume_capabilities) {
6912 case TPACPI_VOL_CAP_AUTO:
6913 if (quirks & TPACPI_VOL_Q_MUTEONLY)
6914 tp_features.mixer_no_level_control = 1;
6915 else if (quirks & TPACPI_VOL_Q_LEVEL)
6916 tp_features.mixer_no_level_control = 0;
6917 else
6918 return 1; /* no mixer */
6919 break;
6920 case TPACPI_VOL_CAP_VOLMUTE:
6921 tp_features.mixer_no_level_control = 0;
6922 break;
6923 case TPACPI_VOL_CAP_MUTEONLY:
6924 tp_features.mixer_no_level_control = 1;
6925 break;
6926 default:
6927 return 1;
6928 }
6929
6930 if (volume_capabilities != TPACPI_VOL_CAP_AUTO)
6931 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
6932 "using user-supplied volume_capabilities=%d\n",
6933 volume_capabilities);
6934
6935 if (volume_mode == TPACPI_VOL_MODE_AUTO ||
6936 volume_mode == TPACPI_VOL_MODE_MAX) {
6937 volume_mode = TPACPI_VOL_MODE_ECNVRAM;
6938
6939 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
6940 "driver auto-selected volume_mode=%d\n",
6941 volume_mode);
6942 } else {
6943 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
6944 "using user-supplied volume_mode=%d\n",
6945 volume_mode);
6946 }
6947
6948 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
6949 "mute is supported, volume control is %s\n",
6950 str_supported(!tp_features.mixer_no_level_control));
6951
6952 rc = volume_create_alsa_mixer();
6953 if (rc) {
6954 pr_err("Could not create the ALSA mixer interface\n");
6955 return rc;
6956 }
6957
6958 pr_info("Console audio control enabled, mode: %s\n",
6959 (volume_control_allowed) ?
6960 "override (read/write)" :
6961 "monitor (read only)");
6962
6963 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
6964 "registering volume hotkeys as change notification\n");
6965 tpacpi_hotkey_driver_mask_set(hotkey_driver_mask
6966 | TP_ACPI_HKEY_VOLUP_MASK
6967 | TP_ACPI_HKEY_VOLDWN_MASK
6968 | TP_ACPI_HKEY_MUTE_MASK);
6969
6970 return 0;
6971 }
6972
6973 static int volume_read(struct seq_file *m)
6974 {
6975 u8 status;
6976
6977 if (volume_get_status(&status) < 0) {
6978 seq_printf(m, "level:\t\tunreadable\n");
6979 } else {
6980 if (tp_features.mixer_no_level_control)
6981 seq_printf(m, "level:\t\tunsupported\n");
6982 else
6983 seq_printf(m, "level:\t\t%d\n",
6984 status & TP_EC_AUDIO_LVL_MSK);
6985
6986 seq_printf(m, "mute:\t\t%s\n",
6987 onoff(status, TP_EC_AUDIO_MUTESW));
6988
6989 if (volume_control_allowed) {
6990 seq_printf(m, "commands:\tunmute, mute\n");
6991 if (!tp_features.mixer_no_level_control) {
6992 seq_printf(m,
6993 "commands:\tup, down\n");
6994 seq_printf(m,
6995 "commands:\tlevel <level>"
6996 " (<level> is 0-%d)\n",
6997 TP_EC_VOLUME_MAX);
6998 }
6999 }
7000 }
7001
7002 return 0;
7003 }
7004
7005 static int volume_write(char *buf)
7006 {
7007 u8 s;
7008 u8 new_level, new_mute;
7009 int l;
7010 char *cmd;
7011 int rc;
7012
7013 /*
7014 * We do allow volume control at driver startup, so that the
7015 * user can set initial state through the volume=... parameter hack.
7016 */
7017 if (!volume_control_allowed && tpacpi_lifecycle != TPACPI_LIFE_INIT) {
7018 if (unlikely(!tp_warned.volume_ctrl_forbidden)) {
7019 tp_warned.volume_ctrl_forbidden = 1;
7020 pr_notice("Console audio control in monitor mode, "
7021 "changes are not allowed\n");
7022 pr_notice("Use the volume_control=1 module parameter "
7023 "to enable volume control\n");
7024 }
7025 return -EPERM;
7026 }
7027
7028 rc = volume_get_status(&s);
7029 if (rc < 0)
7030 return rc;
7031
7032 new_level = s & TP_EC_AUDIO_LVL_MSK;
7033 new_mute = s & TP_EC_AUDIO_MUTESW_MSK;
7034
7035 while ((cmd = next_cmd(&buf))) {
7036 if (!tp_features.mixer_no_level_control) {
7037 if (strlencmp(cmd, "up") == 0) {
7038 if (new_mute)
7039 new_mute = 0;
7040 else if (new_level < TP_EC_VOLUME_MAX)
7041 new_level++;
7042 continue;
7043 } else if (strlencmp(cmd, "down") == 0) {
7044 if (new_mute)
7045 new_mute = 0;
7046 else if (new_level > 0)
7047 new_level--;
7048 continue;
7049 } else if (sscanf(cmd, "level %u", &l) == 1 &&
7050 l >= 0 && l <= TP_EC_VOLUME_MAX) {
7051 new_level = l;
7052 continue;
7053 }
7054 }
7055 if (strlencmp(cmd, "mute") == 0)
7056 new_mute = TP_EC_AUDIO_MUTESW_MSK;
7057 else if (strlencmp(cmd, "unmute") == 0)
7058 new_mute = 0;
7059 else
7060 return -EINVAL;
7061 }
7062
7063 if (tp_features.mixer_no_level_control) {
7064 tpacpi_disclose_usertask("procfs volume", "%smute\n",
7065 new_mute ? "" : "un");
7066 rc = volume_set_mute(!!new_mute);
7067 } else {
7068 tpacpi_disclose_usertask("procfs volume",
7069 "%smute and set level to %d\n",
7070 new_mute ? "" : "un", new_level);
7071 rc = volume_set_status(new_mute | new_level);
7072 }
7073 volume_alsa_notify_change();
7074
7075 return (rc == -EINTR) ? -ERESTARTSYS : rc;
7076 }
7077
7078 static struct ibm_struct volume_driver_data = {
7079 .name = "volume",
7080 .read = volume_read,
7081 .write = volume_write,
7082 .exit = volume_exit,
7083 .suspend = volume_suspend,
7084 .resume = volume_resume,
7085 .shutdown = volume_shutdown,
7086 };
7087
7088 #else /* !CONFIG_THINKPAD_ACPI_ALSA_SUPPORT */
7089
7090 #define alsa_card NULL
7091
7092 static void inline volume_alsa_notify_change(void)
7093 {
7094 }
7095
7096 static int __init volume_init(struct ibm_init_struct *iibm)
7097 {
7098 pr_info("volume: disabled as there is no ALSA support in this kernel\n");
7099
7100 return 1;
7101 }
7102
7103 static struct ibm_struct volume_driver_data = {
7104 .name = "volume",
7105 };
7106
7107 #endif /* CONFIG_THINKPAD_ACPI_ALSA_SUPPORT */
7108
7109 /*************************************************************************
7110 * Fan subdriver
7111 */
7112
7113 /*
7114 * FAN ACCESS MODES
7115 *
7116 * TPACPI_FAN_RD_ACPI_GFAN:
7117 * ACPI GFAN method: returns fan level
7118 *
7119 * see TPACPI_FAN_WR_ACPI_SFAN
7120 * EC 0x2f (HFSP) not available if GFAN exists
7121 *
7122 * TPACPI_FAN_WR_ACPI_SFAN:
7123 * ACPI SFAN method: sets fan level, 0 (stop) to 7 (max)
7124 *
7125 * EC 0x2f (HFSP) might be available *for reading*, but do not use
7126 * it for writing.
7127 *
7128 * TPACPI_FAN_WR_TPEC:
7129 * ThinkPad EC register 0x2f (HFSP): fan control loop mode
7130 * Supported on almost all ThinkPads
7131 *
7132 * Fan speed changes of any sort (including those caused by the
7133 * disengaged mode) are usually done slowly by the firmware as the
7134 * maximum amount of fan duty cycle change per second seems to be
7135 * limited.
7136 *
7137 * Reading is not available if GFAN exists.
7138 * Writing is not available if SFAN exists.
7139 *
7140 * Bits
7141 * 7 automatic mode engaged;
7142 * (default operation mode of the ThinkPad)
7143 * fan level is ignored in this mode.
7144 * 6 full speed mode (takes precedence over bit 7);
7145 * not available on all thinkpads. May disable
7146 * the tachometer while the fan controller ramps up
7147 * the speed (which can take up to a few *minutes*).
7148 * Speeds up fan to 100% duty-cycle, which is far above
7149 * the standard RPM levels. It is not impossible that
7150 * it could cause hardware damage.
7151 * 5-3 unused in some models. Extra bits for fan level
7152 * in others, but still useless as all values above
7153 * 7 map to the same speed as level 7 in these models.
7154 * 2-0 fan level (0..7 usually)
7155 * 0x00 = stop
7156 * 0x07 = max (set when temperatures critical)
7157 * Some ThinkPads may have other levels, see
7158 * TPACPI_FAN_WR_ACPI_FANS (X31/X40/X41)
7159 *
7160 * FIRMWARE BUG: on some models, EC 0x2f might not be initialized at
7161 * boot. Apparently the EC does not initialize it, so unless ACPI DSDT
7162 * does so, its initial value is meaningless (0x07).
7163 *
7164 * For firmware bugs, refer to:
7165 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
7166 *
7167 * ----
7168 *
7169 * ThinkPad EC register 0x84 (LSB), 0x85 (MSB):
7170 * Main fan tachometer reading (in RPM)
7171 *
7172 * This register is present on all ThinkPads with a new-style EC, and
7173 * it is known not to be present on the A21m/e, and T22, as there is
7174 * something else in offset 0x84 according to the ACPI DSDT. Other
7175 * ThinkPads from this same time period (and earlier) probably lack the
7176 * tachometer as well.
7177 *
7178 * Unfortunately a lot of ThinkPads with new-style ECs but whose firmware
7179 * was never fixed by IBM to report the EC firmware version string
7180 * probably support the tachometer (like the early X models), so
7181 * detecting it is quite hard. We need more data to know for sure.
7182 *
7183 * FIRMWARE BUG: always read 0x84 first, otherwise incorrect readings
7184 * might result.
7185 *
7186 * FIRMWARE BUG: may go stale while the EC is switching to full speed
7187 * mode.
7188 *
7189 * For firmware bugs, refer to:
7190 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
7191 *
7192 * ----
7193 *
7194 * ThinkPad EC register 0x31 bit 0 (only on select models)
7195 *
7196 * When bit 0 of EC register 0x31 is zero, the tachometer registers
7197 * show the speed of the main fan. When bit 0 of EC register 0x31
7198 * is one, the tachometer registers show the speed of the auxiliary
7199 * fan.
7200 *
7201 * Fan control seems to affect both fans, regardless of the state
7202 * of this bit.
7203 *
7204 * So far, only the firmware for the X60/X61 non-tablet versions
7205 * seem to support this (firmware TP-7M).
7206 *
7207 * TPACPI_FAN_WR_ACPI_FANS:
7208 * ThinkPad X31, X40, X41. Not available in the X60.
7209 *
7210 * FANS ACPI handle: takes three arguments: low speed, medium speed,
7211 * high speed. ACPI DSDT seems to map these three speeds to levels
7212 * as follows: STOP LOW LOW MED MED HIGH HIGH HIGH HIGH
7213 * (this map is stored on FAN0..FAN8 as "0,1,1,2,2,3,3,3,3")
7214 *
7215 * The speeds are stored on handles
7216 * (FANA:FAN9), (FANC:FANB), (FANE:FAND).
7217 *
7218 * There are three default speed sets, accessible as handles:
7219 * FS1L,FS1M,FS1H; FS2L,FS2M,FS2H; FS3L,FS3M,FS3H
7220 *
7221 * ACPI DSDT switches which set is in use depending on various
7222 * factors.
7223 *
7224 * TPACPI_FAN_WR_TPEC is also available and should be used to
7225 * command the fan. The X31/X40/X41 seems to have 8 fan levels,
7226 * but the ACPI tables just mention level 7.
7227 */
7228
7229 enum { /* Fan control constants */
7230 fan_status_offset = 0x2f, /* EC register 0x2f */
7231 fan_rpm_offset = 0x84, /* EC register 0x84: LSB, 0x85 MSB (RPM)
7232 * 0x84 must be read before 0x85 */
7233 fan_select_offset = 0x31, /* EC register 0x31 (Firmware 7M)
7234 bit 0 selects which fan is active */
7235
7236 TP_EC_FAN_FULLSPEED = 0x40, /* EC fan mode: full speed */
7237 TP_EC_FAN_AUTO = 0x80, /* EC fan mode: auto fan control */
7238
7239 TPACPI_FAN_LAST_LEVEL = 0x100, /* Use cached last-seen fan level */
7240 };
7241
7242 enum fan_status_access_mode {
7243 TPACPI_FAN_NONE = 0, /* No fan status or control */
7244 TPACPI_FAN_RD_ACPI_GFAN, /* Use ACPI GFAN */
7245 TPACPI_FAN_RD_TPEC, /* Use ACPI EC regs 0x2f, 0x84-0x85 */
7246 };
7247
7248 enum fan_control_access_mode {
7249 TPACPI_FAN_WR_NONE = 0, /* No fan control */
7250 TPACPI_FAN_WR_ACPI_SFAN, /* Use ACPI SFAN */
7251 TPACPI_FAN_WR_TPEC, /* Use ACPI EC reg 0x2f */
7252 TPACPI_FAN_WR_ACPI_FANS, /* Use ACPI FANS and EC reg 0x2f */
7253 };
7254
7255 enum fan_control_commands {
7256 TPACPI_FAN_CMD_SPEED = 0x0001, /* speed command */
7257 TPACPI_FAN_CMD_LEVEL = 0x0002, /* level command */
7258 TPACPI_FAN_CMD_ENABLE = 0x0004, /* enable/disable cmd,
7259 * and also watchdog cmd */
7260 };
7261
7262 static int fan_control_allowed;
7263
7264 static enum fan_status_access_mode fan_status_access_mode;
7265 static enum fan_control_access_mode fan_control_access_mode;
7266 static enum fan_control_commands fan_control_commands;
7267
7268 static u8 fan_control_initial_status;
7269 static u8 fan_control_desired_level;
7270 static u8 fan_control_resume_level;
7271 static int fan_watchdog_maxinterval;
7272
7273 static struct mutex fan_mutex;
7274
7275 static void fan_watchdog_fire(struct work_struct *ignored);
7276 static DECLARE_DELAYED_WORK(fan_watchdog_task, fan_watchdog_fire);
7277
7278 TPACPI_HANDLE(fans, ec, "FANS"); /* X31, X40, X41 */
7279 TPACPI_HANDLE(gfan, ec, "GFAN", /* 570 */
7280 "\\FSPD", /* 600e/x, 770e, 770x */
7281 ); /* all others */
7282 TPACPI_HANDLE(sfan, ec, "SFAN", /* 570 */
7283 "JFNS", /* 770x-JL */
7284 ); /* all others */
7285
7286 /*
7287 * Unitialized HFSP quirk: ACPI DSDT and EC fail to initialize the
7288 * HFSP register at boot, so it contains 0x07 but the Thinkpad could
7289 * be in auto mode (0x80).
7290 *
7291 * This is corrected by any write to HFSP either by the driver, or
7292 * by the firmware.
7293 *
7294 * We assume 0x07 really means auto mode while this quirk is active,
7295 * as this is far more likely than the ThinkPad being in level 7,
7296 * which is only used by the firmware during thermal emergencies.
7297 *
7298 * Enable for TP-1Y (T43), TP-78 (R51e), TP-76 (R52),
7299 * TP-70 (T43, R52), which are known to be buggy.
7300 */
7301
7302 static void fan_quirk1_setup(void)
7303 {
7304 if (fan_control_initial_status == 0x07) {
7305 pr_notice("fan_init: initial fan status is unknown, "
7306 "assuming it is in auto mode\n");
7307 tp_features.fan_ctrl_status_undef = 1;
7308 }
7309 }
7310
7311 static void fan_quirk1_handle(u8 *fan_status)
7312 {
7313 if (unlikely(tp_features.fan_ctrl_status_undef)) {
7314 if (*fan_status != fan_control_initial_status) {
7315 /* something changed the HFSP regisnter since
7316 * driver init time, so it is not undefined
7317 * anymore */
7318 tp_features.fan_ctrl_status_undef = 0;
7319 } else {
7320 /* Return most likely status. In fact, it
7321 * might be the only possible status */
7322 *fan_status = TP_EC_FAN_AUTO;
7323 }
7324 }
7325 }
7326
7327 /* Select main fan on X60/X61, NOOP on others */
7328 static bool fan_select_fan1(void)
7329 {
7330 if (tp_features.second_fan) {
7331 u8 val;
7332
7333 if (ec_read(fan_select_offset, &val) < 0)
7334 return false;
7335 val &= 0xFEU;
7336 if (ec_write(fan_select_offset, val) < 0)
7337 return false;
7338 }
7339 return true;
7340 }
7341
7342 /* Select secondary fan on X60/X61 */
7343 static bool fan_select_fan2(void)
7344 {
7345 u8 val;
7346
7347 if (!tp_features.second_fan)
7348 return false;
7349
7350 if (ec_read(fan_select_offset, &val) < 0)
7351 return false;
7352 val |= 0x01U;
7353 if (ec_write(fan_select_offset, val) < 0)
7354 return false;
7355
7356 return true;
7357 }
7358
7359 /*
7360 * Call with fan_mutex held
7361 */
7362 static void fan_update_desired_level(u8 status)
7363 {
7364 if ((status &
7365 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
7366 if (status > 7)
7367 fan_control_desired_level = 7;
7368 else
7369 fan_control_desired_level = status;
7370 }
7371 }
7372
7373 static int fan_get_status(u8 *status)
7374 {
7375 u8 s;
7376
7377 /* TODO:
7378 * Add TPACPI_FAN_RD_ACPI_FANS ? */
7379
7380 switch (fan_status_access_mode) {
7381 case TPACPI_FAN_RD_ACPI_GFAN:
7382 /* 570, 600e/x, 770e, 770x */
7383
7384 if (unlikely(!acpi_evalf(gfan_handle, &s, NULL, "d")))
7385 return -EIO;
7386
7387 if (likely(status))
7388 *status = s & 0x07;
7389
7390 break;
7391
7392 case TPACPI_FAN_RD_TPEC:
7393 /* all except 570, 600e/x, 770e, 770x */
7394 if (unlikely(!acpi_ec_read(fan_status_offset, &s)))
7395 return -EIO;
7396
7397 if (likely(status)) {
7398 *status = s;
7399 fan_quirk1_handle(status);
7400 }
7401
7402 break;
7403
7404 default:
7405 return -ENXIO;
7406 }
7407
7408 return 0;
7409 }
7410
7411 static int fan_get_status_safe(u8 *status)
7412 {
7413 int rc;
7414 u8 s;
7415
7416 if (mutex_lock_killable(&fan_mutex))
7417 return -ERESTARTSYS;
7418 rc = fan_get_status(&s);
7419 if (!rc)
7420 fan_update_desired_level(s);
7421 mutex_unlock(&fan_mutex);
7422
7423 if (status)
7424 *status = s;
7425
7426 return rc;
7427 }
7428
7429 static int fan_get_speed(unsigned int *speed)
7430 {
7431 u8 hi, lo;
7432
7433 switch (fan_status_access_mode) {
7434 case TPACPI_FAN_RD_TPEC:
7435 /* all except 570, 600e/x, 770e, 770x */
7436 if (unlikely(!fan_select_fan1()))
7437 return -EIO;
7438 if (unlikely(!acpi_ec_read(fan_rpm_offset, &lo) ||
7439 !acpi_ec_read(fan_rpm_offset + 1, &hi)))
7440 return -EIO;
7441
7442 if (likely(speed))
7443 *speed = (hi << 8) | lo;
7444
7445 break;
7446
7447 default:
7448 return -ENXIO;
7449 }
7450
7451 return 0;
7452 }
7453
7454 static int fan2_get_speed(unsigned int *speed)
7455 {
7456 u8 hi, lo;
7457 bool rc;
7458
7459 switch (fan_status_access_mode) {
7460 case TPACPI_FAN_RD_TPEC:
7461 /* all except 570, 600e/x, 770e, 770x */
7462 if (unlikely(!fan_select_fan2()))
7463 return -EIO;
7464 rc = !acpi_ec_read(fan_rpm_offset, &lo) ||
7465 !acpi_ec_read(fan_rpm_offset + 1, &hi);
7466 fan_select_fan1(); /* play it safe */
7467 if (rc)
7468 return -EIO;
7469
7470 if (likely(speed))
7471 *speed = (hi << 8) | lo;
7472
7473 break;
7474
7475 default:
7476 return -ENXIO;
7477 }
7478
7479 return 0;
7480 }
7481
7482 static int fan_set_level(int level)
7483 {
7484 if (!fan_control_allowed)
7485 return -EPERM;
7486
7487 switch (fan_control_access_mode) {
7488 case TPACPI_FAN_WR_ACPI_SFAN:
7489 if (level >= 0 && level <= 7) {
7490 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", level))
7491 return -EIO;
7492 } else
7493 return -EINVAL;
7494 break;
7495
7496 case TPACPI_FAN_WR_ACPI_FANS:
7497 case TPACPI_FAN_WR_TPEC:
7498 if (!(level & TP_EC_FAN_AUTO) &&
7499 !(level & TP_EC_FAN_FULLSPEED) &&
7500 ((level < 0) || (level > 7)))
7501 return -EINVAL;
7502
7503 /* safety net should the EC not support AUTO
7504 * or FULLSPEED mode bits and just ignore them */
7505 if (level & TP_EC_FAN_FULLSPEED)
7506 level |= 7; /* safety min speed 7 */
7507 else if (level & TP_EC_FAN_AUTO)
7508 level |= 4; /* safety min speed 4 */
7509
7510 if (!acpi_ec_write(fan_status_offset, level))
7511 return -EIO;
7512 else
7513 tp_features.fan_ctrl_status_undef = 0;
7514 break;
7515
7516 default:
7517 return -ENXIO;
7518 }
7519
7520 vdbg_printk(TPACPI_DBG_FAN,
7521 "fan control: set fan control register to 0x%02x\n", level);
7522 return 0;
7523 }
7524
7525 static int fan_set_level_safe(int level)
7526 {
7527 int rc;
7528
7529 if (!fan_control_allowed)
7530 return -EPERM;
7531
7532 if (mutex_lock_killable(&fan_mutex))
7533 return -ERESTARTSYS;
7534
7535 if (level == TPACPI_FAN_LAST_LEVEL)
7536 level = fan_control_desired_level;
7537
7538 rc = fan_set_level(level);
7539 if (!rc)
7540 fan_update_desired_level(level);
7541
7542 mutex_unlock(&fan_mutex);
7543 return rc;
7544 }
7545
7546 static int fan_set_enable(void)
7547 {
7548 u8 s;
7549 int rc;
7550
7551 if (!fan_control_allowed)
7552 return -EPERM;
7553
7554 if (mutex_lock_killable(&fan_mutex))
7555 return -ERESTARTSYS;
7556
7557 switch (fan_control_access_mode) {
7558 case TPACPI_FAN_WR_ACPI_FANS:
7559 case TPACPI_FAN_WR_TPEC:
7560 rc = fan_get_status(&s);
7561 if (rc < 0)
7562 break;
7563
7564 /* Don't go out of emergency fan mode */
7565 if (s != 7) {
7566 s &= 0x07;
7567 s |= TP_EC_FAN_AUTO | 4; /* min fan speed 4 */
7568 }
7569
7570 if (!acpi_ec_write(fan_status_offset, s))
7571 rc = -EIO;
7572 else {
7573 tp_features.fan_ctrl_status_undef = 0;
7574 rc = 0;
7575 }
7576 break;
7577
7578 case TPACPI_FAN_WR_ACPI_SFAN:
7579 rc = fan_get_status(&s);
7580 if (rc < 0)
7581 break;
7582
7583 s &= 0x07;
7584
7585 /* Set fan to at least level 4 */
7586 s |= 4;
7587
7588 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", s))
7589 rc = -EIO;
7590 else
7591 rc = 0;
7592 break;
7593
7594 default:
7595 rc = -ENXIO;
7596 }
7597
7598 mutex_unlock(&fan_mutex);
7599
7600 if (!rc)
7601 vdbg_printk(TPACPI_DBG_FAN,
7602 "fan control: set fan control register to 0x%02x\n",
7603 s);
7604 return rc;
7605 }
7606
7607 static int fan_set_disable(void)
7608 {
7609 int rc;
7610
7611 if (!fan_control_allowed)
7612 return -EPERM;
7613
7614 if (mutex_lock_killable(&fan_mutex))
7615 return -ERESTARTSYS;
7616
7617 rc = 0;
7618 switch (fan_control_access_mode) {
7619 case TPACPI_FAN_WR_ACPI_FANS:
7620 case TPACPI_FAN_WR_TPEC:
7621 if (!acpi_ec_write(fan_status_offset, 0x00))
7622 rc = -EIO;
7623 else {
7624 fan_control_desired_level = 0;
7625 tp_features.fan_ctrl_status_undef = 0;
7626 }
7627 break;
7628
7629 case TPACPI_FAN_WR_ACPI_SFAN:
7630 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", 0x00))
7631 rc = -EIO;
7632 else
7633 fan_control_desired_level = 0;
7634 break;
7635
7636 default:
7637 rc = -ENXIO;
7638 }
7639
7640 if (!rc)
7641 vdbg_printk(TPACPI_DBG_FAN,
7642 "fan control: set fan control register to 0\n");
7643
7644 mutex_unlock(&fan_mutex);
7645 return rc;
7646 }
7647
7648 static int fan_set_speed(int speed)
7649 {
7650 int rc;
7651
7652 if (!fan_control_allowed)
7653 return -EPERM;
7654
7655 if (mutex_lock_killable(&fan_mutex))
7656 return -ERESTARTSYS;
7657
7658 rc = 0;
7659 switch (fan_control_access_mode) {
7660 case TPACPI_FAN_WR_ACPI_FANS:
7661 if (speed >= 0 && speed <= 65535) {
7662 if (!acpi_evalf(fans_handle, NULL, NULL, "vddd",
7663 speed, speed, speed))
7664 rc = -EIO;
7665 } else
7666 rc = -EINVAL;
7667 break;
7668
7669 default:
7670 rc = -ENXIO;
7671 }
7672
7673 mutex_unlock(&fan_mutex);
7674 return rc;
7675 }
7676
7677 static void fan_watchdog_reset(void)
7678 {
7679 static int fan_watchdog_active;
7680
7681 if (fan_control_access_mode == TPACPI_FAN_WR_NONE)
7682 return;
7683
7684 if (fan_watchdog_active)
7685 cancel_delayed_work(&fan_watchdog_task);
7686
7687 if (fan_watchdog_maxinterval > 0 &&
7688 tpacpi_lifecycle != TPACPI_LIFE_EXITING) {
7689 fan_watchdog_active = 1;
7690 if (!queue_delayed_work(tpacpi_wq, &fan_watchdog_task,
7691 msecs_to_jiffies(fan_watchdog_maxinterval
7692 * 1000))) {
7693 pr_err("failed to queue the fan watchdog, "
7694 "watchdog will not trigger\n");
7695 }
7696 } else
7697 fan_watchdog_active = 0;
7698 }
7699
7700 static void fan_watchdog_fire(struct work_struct *ignored)
7701 {
7702 int rc;
7703
7704 if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
7705 return;
7706
7707 pr_notice("fan watchdog: enabling fan\n");
7708 rc = fan_set_enable();
7709 if (rc < 0) {
7710 pr_err("fan watchdog: error %d while enabling fan, "
7711 "will try again later...\n", -rc);
7712 /* reschedule for later */
7713 fan_watchdog_reset();
7714 }
7715 }
7716
7717 /*
7718 * SYSFS fan layout: hwmon compatible (device)
7719 *
7720 * pwm*_enable:
7721 * 0: "disengaged" mode
7722 * 1: manual mode
7723 * 2: native EC "auto" mode (recommended, hardware default)
7724 *
7725 * pwm*: set speed in manual mode, ignored otherwise.
7726 * 0 is level 0; 255 is level 7. Intermediate points done with linear
7727 * interpolation.
7728 *
7729 * fan*_input: tachometer reading, RPM
7730 *
7731 *
7732 * SYSFS fan layout: extensions
7733 *
7734 * fan_watchdog (driver):
7735 * fan watchdog interval in seconds, 0 disables (default), max 120
7736 */
7737
7738 /* sysfs fan pwm1_enable ----------------------------------------------- */
7739 static ssize_t fan_pwm1_enable_show(struct device *dev,
7740 struct device_attribute *attr,
7741 char *buf)
7742 {
7743 int res, mode;
7744 u8 status;
7745
7746 res = fan_get_status_safe(&status);
7747 if (res)
7748 return res;
7749
7750 if (status & TP_EC_FAN_FULLSPEED) {
7751 mode = 0;
7752 } else if (status & TP_EC_FAN_AUTO) {
7753 mode = 2;
7754 } else
7755 mode = 1;
7756
7757 return snprintf(buf, PAGE_SIZE, "%d\n", mode);
7758 }
7759
7760 static ssize_t fan_pwm1_enable_store(struct device *dev,
7761 struct device_attribute *attr,
7762 const char *buf, size_t count)
7763 {
7764 unsigned long t;
7765 int res, level;
7766
7767 if (parse_strtoul(buf, 2, &t))
7768 return -EINVAL;
7769
7770 tpacpi_disclose_usertask("hwmon pwm1_enable",
7771 "set fan mode to %lu\n", t);
7772
7773 switch (t) {
7774 case 0:
7775 level = TP_EC_FAN_FULLSPEED;
7776 break;
7777 case 1:
7778 level = TPACPI_FAN_LAST_LEVEL;
7779 break;
7780 case 2:
7781 level = TP_EC_FAN_AUTO;
7782 break;
7783 case 3:
7784 /* reserved for software-controlled auto mode */
7785 return -ENOSYS;
7786 default:
7787 return -EINVAL;
7788 }
7789
7790 res = fan_set_level_safe(level);
7791 if (res == -ENXIO)
7792 return -EINVAL;
7793 else if (res < 0)
7794 return res;
7795
7796 fan_watchdog_reset();
7797
7798 return count;
7799 }
7800
7801 static struct device_attribute dev_attr_fan_pwm1_enable =
7802 __ATTR(pwm1_enable, S_IWUSR | S_IRUGO,
7803 fan_pwm1_enable_show, fan_pwm1_enable_store);
7804
7805 /* sysfs fan pwm1 ------------------------------------------------------ */
7806 static ssize_t fan_pwm1_show(struct device *dev,
7807 struct device_attribute *attr,
7808 char *buf)
7809 {
7810 int res;
7811 u8 status;
7812
7813 res = fan_get_status_safe(&status);
7814 if (res)
7815 return res;
7816
7817 if ((status &
7818 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) != 0)
7819 status = fan_control_desired_level;
7820
7821 if (status > 7)
7822 status = 7;
7823
7824 return snprintf(buf, PAGE_SIZE, "%u\n", (status * 255) / 7);
7825 }
7826
7827 static ssize_t fan_pwm1_store(struct device *dev,
7828 struct device_attribute *attr,
7829 const char *buf, size_t count)
7830 {
7831 unsigned long s;
7832 int rc;
7833 u8 status, newlevel;
7834
7835 if (parse_strtoul(buf, 255, &s))
7836 return -EINVAL;
7837
7838 tpacpi_disclose_usertask("hwmon pwm1",
7839 "set fan speed to %lu\n", s);
7840
7841 /* scale down from 0-255 to 0-7 */
7842 newlevel = (s >> 5) & 0x07;
7843
7844 if (mutex_lock_killable(&fan_mutex))
7845 return -ERESTARTSYS;
7846
7847 rc = fan_get_status(&status);
7848 if (!rc && (status &
7849 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
7850 rc = fan_set_level(newlevel);
7851 if (rc == -ENXIO)
7852 rc = -EINVAL;
7853 else if (!rc) {
7854 fan_update_desired_level(newlevel);
7855 fan_watchdog_reset();
7856 }
7857 }
7858
7859 mutex_unlock(&fan_mutex);
7860 return (rc)? rc : count;
7861 }
7862
7863 static struct device_attribute dev_attr_fan_pwm1 =
7864 __ATTR(pwm1, S_IWUSR | S_IRUGO,
7865 fan_pwm1_show, fan_pwm1_store);
7866
7867 /* sysfs fan fan1_input ------------------------------------------------ */
7868 static ssize_t fan_fan1_input_show(struct device *dev,
7869 struct device_attribute *attr,
7870 char *buf)
7871 {
7872 int res;
7873 unsigned int speed;
7874
7875 res = fan_get_speed(&speed);
7876 if (res < 0)
7877 return res;
7878
7879 return snprintf(buf, PAGE_SIZE, "%u\n", speed);
7880 }
7881
7882 static struct device_attribute dev_attr_fan_fan1_input =
7883 __ATTR(fan1_input, S_IRUGO,
7884 fan_fan1_input_show, NULL);
7885
7886 /* sysfs fan fan2_input ------------------------------------------------ */
7887 static ssize_t fan_fan2_input_show(struct device *dev,
7888 struct device_attribute *attr,
7889 char *buf)
7890 {
7891 int res;
7892 unsigned int speed;
7893
7894 res = fan2_get_speed(&speed);
7895 if (res < 0)
7896 return res;
7897
7898 return snprintf(buf, PAGE_SIZE, "%u\n", speed);
7899 }
7900
7901 static struct device_attribute dev_attr_fan_fan2_input =
7902 __ATTR(fan2_input, S_IRUGO,
7903 fan_fan2_input_show, NULL);
7904
7905 /* sysfs fan fan_watchdog (hwmon driver) ------------------------------- */
7906 static ssize_t fan_fan_watchdog_show(struct device_driver *drv,
7907 char *buf)
7908 {
7909 return snprintf(buf, PAGE_SIZE, "%u\n", fan_watchdog_maxinterval);
7910 }
7911
7912 static ssize_t fan_fan_watchdog_store(struct device_driver *drv,
7913 const char *buf, size_t count)
7914 {
7915 unsigned long t;
7916
7917 if (parse_strtoul(buf, 120, &t))
7918 return -EINVAL;
7919
7920 if (!fan_control_allowed)
7921 return -EPERM;
7922
7923 fan_watchdog_maxinterval = t;
7924 fan_watchdog_reset();
7925
7926 tpacpi_disclose_usertask("fan_watchdog", "set to %lu\n", t);
7927
7928 return count;
7929 }
7930
7931 static DRIVER_ATTR(fan_watchdog, S_IWUSR | S_IRUGO,
7932 fan_fan_watchdog_show, fan_fan_watchdog_store);
7933
7934 /* --------------------------------------------------------------------- */
7935 static struct attribute *fan_attributes[] = {
7936 &dev_attr_fan_pwm1_enable.attr, &dev_attr_fan_pwm1.attr,
7937 &dev_attr_fan_fan1_input.attr,
7938 NULL, /* for fan2_input */
7939 NULL
7940 };
7941
7942 static const struct attribute_group fan_attr_group = {
7943 .attrs = fan_attributes,
7944 };
7945
7946 #define TPACPI_FAN_Q1 0x0001 /* Unitialized HFSP */
7947 #define TPACPI_FAN_2FAN 0x0002 /* EC 0x31 bit 0 selects fan2 */
7948
7949 #define TPACPI_FAN_QI(__id1, __id2, __quirks) \
7950 { .vendor = PCI_VENDOR_ID_IBM, \
7951 .bios = TPACPI_MATCH_ANY, \
7952 .ec = TPID(__id1, __id2), \
7953 .quirks = __quirks }
7954
7955 #define TPACPI_FAN_QL(__id1, __id2, __quirks) \
7956 { .vendor = PCI_VENDOR_ID_LENOVO, \
7957 .bios = TPACPI_MATCH_ANY, \
7958 .ec = TPID(__id1, __id2), \
7959 .quirks = __quirks }
7960
7961 static const struct tpacpi_quirk fan_quirk_table[] __initconst = {
7962 TPACPI_FAN_QI('1', 'Y', TPACPI_FAN_Q1),
7963 TPACPI_FAN_QI('7', '8', TPACPI_FAN_Q1),
7964 TPACPI_FAN_QI('7', '6', TPACPI_FAN_Q1),
7965 TPACPI_FAN_QI('7', '0', TPACPI_FAN_Q1),
7966 TPACPI_FAN_QL('7', 'M', TPACPI_FAN_2FAN),
7967 };
7968
7969 #undef TPACPI_FAN_QL
7970 #undef TPACPI_FAN_QI
7971
7972 static int __init fan_init(struct ibm_init_struct *iibm)
7973 {
7974 int rc;
7975 unsigned long quirks;
7976
7977 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
7978 "initializing fan subdriver\n");
7979
7980 mutex_init(&fan_mutex);
7981 fan_status_access_mode = TPACPI_FAN_NONE;
7982 fan_control_access_mode = TPACPI_FAN_WR_NONE;
7983 fan_control_commands = 0;
7984 fan_watchdog_maxinterval = 0;
7985 tp_features.fan_ctrl_status_undef = 0;
7986 tp_features.second_fan = 0;
7987 fan_control_desired_level = 7;
7988
7989 if (tpacpi_is_ibm()) {
7990 TPACPI_ACPIHANDLE_INIT(fans);
7991 TPACPI_ACPIHANDLE_INIT(gfan);
7992 TPACPI_ACPIHANDLE_INIT(sfan);
7993 }
7994
7995 quirks = tpacpi_check_quirks(fan_quirk_table,
7996 ARRAY_SIZE(fan_quirk_table));
7997
7998 if (gfan_handle) {
7999 /* 570, 600e/x, 770e, 770x */
8000 fan_status_access_mode = TPACPI_FAN_RD_ACPI_GFAN;
8001 } else {
8002 /* all other ThinkPads: note that even old-style
8003 * ThinkPad ECs supports the fan control register */
8004 if (likely(acpi_ec_read(fan_status_offset,
8005 &fan_control_initial_status))) {
8006 fan_status_access_mode = TPACPI_FAN_RD_TPEC;
8007 if (quirks & TPACPI_FAN_Q1)
8008 fan_quirk1_setup();
8009 if (quirks & TPACPI_FAN_2FAN) {
8010 tp_features.second_fan = 1;
8011 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
8012 "secondary fan support enabled\n");
8013 }
8014 } else {
8015 pr_err("ThinkPad ACPI EC access misbehaving, "
8016 "fan status and control unavailable\n");
8017 return 1;
8018 }
8019 }
8020
8021 if (sfan_handle) {
8022 /* 570, 770x-JL */
8023 fan_control_access_mode = TPACPI_FAN_WR_ACPI_SFAN;
8024 fan_control_commands |=
8025 TPACPI_FAN_CMD_LEVEL | TPACPI_FAN_CMD_ENABLE;
8026 } else {
8027 if (!gfan_handle) {
8028 /* gfan without sfan means no fan control */
8029 /* all other models implement TP EC 0x2f control */
8030
8031 if (fans_handle) {
8032 /* X31, X40, X41 */
8033 fan_control_access_mode =
8034 TPACPI_FAN_WR_ACPI_FANS;
8035 fan_control_commands |=
8036 TPACPI_FAN_CMD_SPEED |
8037 TPACPI_FAN_CMD_LEVEL |
8038 TPACPI_FAN_CMD_ENABLE;
8039 } else {
8040 fan_control_access_mode = TPACPI_FAN_WR_TPEC;
8041 fan_control_commands |=
8042 TPACPI_FAN_CMD_LEVEL |
8043 TPACPI_FAN_CMD_ENABLE;
8044 }
8045 }
8046 }
8047
8048 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
8049 "fan is %s, modes %d, %d\n",
8050 str_supported(fan_status_access_mode != TPACPI_FAN_NONE ||
8051 fan_control_access_mode != TPACPI_FAN_WR_NONE),
8052 fan_status_access_mode, fan_control_access_mode);
8053
8054 /* fan control master switch */
8055 if (!fan_control_allowed) {
8056 fan_control_access_mode = TPACPI_FAN_WR_NONE;
8057 fan_control_commands = 0;
8058 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
8059 "fan control features disabled by parameter\n");
8060 }
8061
8062 /* update fan_control_desired_level */
8063 if (fan_status_access_mode != TPACPI_FAN_NONE)
8064 fan_get_status_safe(NULL);
8065
8066 if (fan_status_access_mode != TPACPI_FAN_NONE ||
8067 fan_control_access_mode != TPACPI_FAN_WR_NONE) {
8068 if (tp_features.second_fan) {
8069 /* attach second fan tachometer */
8070 fan_attributes[ARRAY_SIZE(fan_attributes)-2] =
8071 &dev_attr_fan_fan2_input.attr;
8072 }
8073 rc = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
8074 &fan_attr_group);
8075 if (rc < 0)
8076 return rc;
8077
8078 rc = driver_create_file(&tpacpi_hwmon_pdriver.driver,
8079 &driver_attr_fan_watchdog);
8080 if (rc < 0) {
8081 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
8082 &fan_attr_group);
8083 return rc;
8084 }
8085 return 0;
8086 } else
8087 return 1;
8088 }
8089
8090 static void fan_exit(void)
8091 {
8092 vdbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_FAN,
8093 "cancelling any pending fan watchdog tasks\n");
8094
8095 /* FIXME: can we really do this unconditionally? */
8096 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj, &fan_attr_group);
8097 driver_remove_file(&tpacpi_hwmon_pdriver.driver,
8098 &driver_attr_fan_watchdog);
8099
8100 cancel_delayed_work(&fan_watchdog_task);
8101 flush_workqueue(tpacpi_wq);
8102 }
8103
8104 static void fan_suspend(pm_message_t state)
8105 {
8106 int rc;
8107
8108 if (!fan_control_allowed)
8109 return;
8110
8111 /* Store fan status in cache */
8112 fan_control_resume_level = 0;
8113 rc = fan_get_status_safe(&fan_control_resume_level);
8114 if (rc < 0)
8115 pr_notice("failed to read fan level for later "
8116 "restore during resume: %d\n", rc);
8117
8118 /* if it is undefined, don't attempt to restore it.
8119 * KEEP THIS LAST */
8120 if (tp_features.fan_ctrl_status_undef)
8121 fan_control_resume_level = 0;
8122 }
8123
8124 static void fan_resume(void)
8125 {
8126 u8 current_level = 7;
8127 bool do_set = false;
8128 int rc;
8129
8130 /* DSDT *always* updates status on resume */
8131 tp_features.fan_ctrl_status_undef = 0;
8132
8133 if (!fan_control_allowed ||
8134 !fan_control_resume_level ||
8135 (fan_get_status_safe(&current_level) < 0))
8136 return;
8137
8138 switch (fan_control_access_mode) {
8139 case TPACPI_FAN_WR_ACPI_SFAN:
8140 /* never decrease fan level */
8141 do_set = (fan_control_resume_level > current_level);
8142 break;
8143 case TPACPI_FAN_WR_ACPI_FANS:
8144 case TPACPI_FAN_WR_TPEC:
8145 /* never decrease fan level, scale is:
8146 * TP_EC_FAN_FULLSPEED > 7 >= TP_EC_FAN_AUTO
8147 *
8148 * We expect the firmware to set either 7 or AUTO, but we
8149 * handle FULLSPEED out of paranoia.
8150 *
8151 * So, we can safely only restore FULLSPEED or 7, anything
8152 * else could slow the fan. Restoring AUTO is useless, at
8153 * best that's exactly what the DSDT already set (it is the
8154 * slower it uses).
8155 *
8156 * Always keep in mind that the DSDT *will* have set the
8157 * fans to what the vendor supposes is the best level. We
8158 * muck with it only to speed the fan up.
8159 */
8160 if (fan_control_resume_level != 7 &&
8161 !(fan_control_resume_level & TP_EC_FAN_FULLSPEED))
8162 return;
8163 else
8164 do_set = !(current_level & TP_EC_FAN_FULLSPEED) &&
8165 (current_level != fan_control_resume_level);
8166 break;
8167 default:
8168 return;
8169 }
8170 if (do_set) {
8171 pr_notice("restoring fan level to 0x%02x\n",
8172 fan_control_resume_level);
8173 rc = fan_set_level_safe(fan_control_resume_level);
8174 if (rc < 0)
8175 pr_notice("failed to restore fan level: %d\n", rc);
8176 }
8177 }
8178
8179 static int fan_read(struct seq_file *m)
8180 {
8181 int rc;
8182 u8 status;
8183 unsigned int speed = 0;
8184
8185 switch (fan_status_access_mode) {
8186 case TPACPI_FAN_RD_ACPI_GFAN:
8187 /* 570, 600e/x, 770e, 770x */
8188 rc = fan_get_status_safe(&status);
8189 if (rc < 0)
8190 return rc;
8191
8192 seq_printf(m, "status:\t\t%s\n"
8193 "level:\t\t%d\n",
8194 (status != 0) ? "enabled" : "disabled", status);
8195 break;
8196
8197 case TPACPI_FAN_RD_TPEC:
8198 /* all except 570, 600e/x, 770e, 770x */
8199 rc = fan_get_status_safe(&status);
8200 if (rc < 0)
8201 return rc;
8202
8203 seq_printf(m, "status:\t\t%s\n",
8204 (status != 0) ? "enabled" : "disabled");
8205
8206 rc = fan_get_speed(&speed);
8207 if (rc < 0)
8208 return rc;
8209
8210 seq_printf(m, "speed:\t\t%d\n", speed);
8211
8212 if (status & TP_EC_FAN_FULLSPEED)
8213 /* Disengaged mode takes precedence */
8214 seq_printf(m, "level:\t\tdisengaged\n");
8215 else if (status & TP_EC_FAN_AUTO)
8216 seq_printf(m, "level:\t\tauto\n");
8217 else
8218 seq_printf(m, "level:\t\t%d\n", status);
8219 break;
8220
8221 case TPACPI_FAN_NONE:
8222 default:
8223 seq_printf(m, "status:\t\tnot supported\n");
8224 }
8225
8226 if (fan_control_commands & TPACPI_FAN_CMD_LEVEL) {
8227 seq_printf(m, "commands:\tlevel <level>");
8228
8229 switch (fan_control_access_mode) {
8230 case TPACPI_FAN_WR_ACPI_SFAN:
8231 seq_printf(m, " (<level> is 0-7)\n");
8232 break;
8233
8234 default:
8235 seq_printf(m, " (<level> is 0-7, "
8236 "auto, disengaged, full-speed)\n");
8237 break;
8238 }
8239 }
8240
8241 if (fan_control_commands & TPACPI_FAN_CMD_ENABLE)
8242 seq_printf(m, "commands:\tenable, disable\n"
8243 "commands:\twatchdog <timeout> (<timeout> "
8244 "is 0 (off), 1-120 (seconds))\n");
8245
8246 if (fan_control_commands & TPACPI_FAN_CMD_SPEED)
8247 seq_printf(m, "commands:\tspeed <speed>"
8248 " (<speed> is 0-65535)\n");
8249
8250 return 0;
8251 }
8252
8253 static int fan_write_cmd_level(const char *cmd, int *rc)
8254 {
8255 int level;
8256
8257 if (strlencmp(cmd, "level auto") == 0)
8258 level = TP_EC_FAN_AUTO;
8259 else if ((strlencmp(cmd, "level disengaged") == 0) |
8260 (strlencmp(cmd, "level full-speed") == 0))
8261 level = TP_EC_FAN_FULLSPEED;
8262 else if (sscanf(cmd, "level %d", &level) != 1)
8263 return 0;
8264
8265 *rc = fan_set_level_safe(level);
8266 if (*rc == -ENXIO)
8267 pr_err("level command accepted for unsupported access mode %d\n",
8268 fan_control_access_mode);
8269 else if (!*rc)
8270 tpacpi_disclose_usertask("procfs fan",
8271 "set level to %d\n", level);
8272
8273 return 1;
8274 }
8275
8276 static int fan_write_cmd_enable(const char *cmd, int *rc)
8277 {
8278 if (strlencmp(cmd, "enable") != 0)
8279 return 0;
8280
8281 *rc = fan_set_enable();
8282 if (*rc == -ENXIO)
8283 pr_err("enable command accepted for unsupported access mode %d\n",
8284 fan_control_access_mode);
8285 else if (!*rc)
8286 tpacpi_disclose_usertask("procfs fan", "enable\n");
8287
8288 return 1;
8289 }
8290
8291 static int fan_write_cmd_disable(const char *cmd, int *rc)
8292 {
8293 if (strlencmp(cmd, "disable") != 0)
8294 return 0;
8295
8296 *rc = fan_set_disable();
8297 if (*rc == -ENXIO)
8298 pr_err("disable command accepted for unsupported access mode %d\n",
8299 fan_control_access_mode);
8300 else if (!*rc)
8301 tpacpi_disclose_usertask("procfs fan", "disable\n");
8302
8303 return 1;
8304 }
8305
8306 static int fan_write_cmd_speed(const char *cmd, int *rc)
8307 {
8308 int speed;
8309
8310 /* TODO:
8311 * Support speed <low> <medium> <high> ? */
8312
8313 if (sscanf(cmd, "speed %d", &speed) != 1)
8314 return 0;
8315
8316 *rc = fan_set_speed(speed);
8317 if (*rc == -ENXIO)
8318 pr_err("speed command accepted for unsupported access mode %d\n",
8319 fan_control_access_mode);
8320 else if (!*rc)
8321 tpacpi_disclose_usertask("procfs fan",
8322 "set speed to %d\n", speed);
8323
8324 return 1;
8325 }
8326
8327 static int fan_write_cmd_watchdog(const char *cmd, int *rc)
8328 {
8329 int interval;
8330
8331 if (sscanf(cmd, "watchdog %d", &interval) != 1)
8332 return 0;
8333
8334 if (interval < 0 || interval > 120)
8335 *rc = -EINVAL;
8336 else {
8337 fan_watchdog_maxinterval = interval;
8338 tpacpi_disclose_usertask("procfs fan",
8339 "set watchdog timer to %d\n",
8340 interval);
8341 }
8342
8343 return 1;
8344 }
8345
8346 static int fan_write(char *buf)
8347 {
8348 char *cmd;
8349 int rc = 0;
8350
8351 while (!rc && (cmd = next_cmd(&buf))) {
8352 if (!((fan_control_commands & TPACPI_FAN_CMD_LEVEL) &&
8353 fan_write_cmd_level(cmd, &rc)) &&
8354 !((fan_control_commands & TPACPI_FAN_CMD_ENABLE) &&
8355 (fan_write_cmd_enable(cmd, &rc) ||
8356 fan_write_cmd_disable(cmd, &rc) ||
8357 fan_write_cmd_watchdog(cmd, &rc))) &&
8358 !((fan_control_commands & TPACPI_FAN_CMD_SPEED) &&
8359 fan_write_cmd_speed(cmd, &rc))
8360 )
8361 rc = -EINVAL;
8362 else if (!rc)
8363 fan_watchdog_reset();
8364 }
8365
8366 return rc;
8367 }
8368
8369 static struct ibm_struct fan_driver_data = {
8370 .name = "fan",
8371 .read = fan_read,
8372 .write = fan_write,
8373 .exit = fan_exit,
8374 .suspend = fan_suspend,
8375 .resume = fan_resume,
8376 };
8377
8378 /****************************************************************************
8379 ****************************************************************************
8380 *
8381 * Infrastructure
8382 *
8383 ****************************************************************************
8384 ****************************************************************************/
8385
8386 /*
8387 * HKEY event callout for other subdrivers go here
8388 * (yes, it is ugly, but it is quick, safe, and gets the job done
8389 */
8390 static void tpacpi_driver_event(const unsigned int hkey_event)
8391 {
8392 if (ibm_backlight_device) {
8393 switch (hkey_event) {
8394 case TP_HKEY_EV_BRGHT_UP:
8395 case TP_HKEY_EV_BRGHT_DOWN:
8396 tpacpi_brightness_notify_change();
8397 }
8398 }
8399 if (alsa_card) {
8400 switch (hkey_event) {
8401 case TP_HKEY_EV_VOL_UP:
8402 case TP_HKEY_EV_VOL_DOWN:
8403 case TP_HKEY_EV_VOL_MUTE:
8404 volume_alsa_notify_change();
8405 }
8406 }
8407 }
8408
8409 static void hotkey_driver_event(const unsigned int scancode)
8410 {
8411 tpacpi_driver_event(TP_HKEY_EV_HOTKEY_BASE + scancode);
8412 }
8413
8414 /* sysfs name ---------------------------------------------------------- */
8415 static ssize_t thinkpad_acpi_pdev_name_show(struct device *dev,
8416 struct device_attribute *attr,
8417 char *buf)
8418 {
8419 return snprintf(buf, PAGE_SIZE, "%s\n", TPACPI_NAME);
8420 }
8421
8422 static struct device_attribute dev_attr_thinkpad_acpi_pdev_name =
8423 __ATTR(name, S_IRUGO, thinkpad_acpi_pdev_name_show, NULL);
8424
8425 /* --------------------------------------------------------------------- */
8426
8427 /* /proc support */
8428 static struct proc_dir_entry *proc_dir;
8429
8430 /*
8431 * Module and infrastructure proble, init and exit handling
8432 */
8433
8434 static int force_load;
8435
8436 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
8437 static const char * __init str_supported(int is_supported)
8438 {
8439 static char text_unsupported[] __initdata = "not supported";
8440
8441 return (is_supported)? &text_unsupported[4] : &text_unsupported[0];
8442 }
8443 #endif /* CONFIG_THINKPAD_ACPI_DEBUG */
8444
8445 static void ibm_exit(struct ibm_struct *ibm)
8446 {
8447 dbg_printk(TPACPI_DBG_EXIT, "removing %s\n", ibm->name);
8448
8449 list_del_init(&ibm->all_drivers);
8450
8451 if (ibm->flags.acpi_notify_installed) {
8452 dbg_printk(TPACPI_DBG_EXIT,
8453 "%s: acpi_remove_notify_handler\n", ibm->name);
8454 BUG_ON(!ibm->acpi);
8455 acpi_remove_notify_handler(*ibm->acpi->handle,
8456 ibm->acpi->type,
8457 dispatch_acpi_notify);
8458 ibm->flags.acpi_notify_installed = 0;
8459 }
8460
8461 if (ibm->flags.proc_created) {
8462 dbg_printk(TPACPI_DBG_EXIT,
8463 "%s: remove_proc_entry\n", ibm->name);
8464 remove_proc_entry(ibm->name, proc_dir);
8465 ibm->flags.proc_created = 0;
8466 }
8467
8468 if (ibm->flags.acpi_driver_registered) {
8469 dbg_printk(TPACPI_DBG_EXIT,
8470 "%s: acpi_bus_unregister_driver\n", ibm->name);
8471 BUG_ON(!ibm->acpi);
8472 acpi_bus_unregister_driver(ibm->acpi->driver);
8473 kfree(ibm->acpi->driver);
8474 ibm->acpi->driver = NULL;
8475 ibm->flags.acpi_driver_registered = 0;
8476 }
8477
8478 if (ibm->flags.init_called && ibm->exit) {
8479 ibm->exit();
8480 ibm->flags.init_called = 0;
8481 }
8482
8483 dbg_printk(TPACPI_DBG_INIT, "finished removing %s\n", ibm->name);
8484 }
8485
8486 static int __init ibm_init(struct ibm_init_struct *iibm)
8487 {
8488 int ret;
8489 struct ibm_struct *ibm = iibm->data;
8490 struct proc_dir_entry *entry;
8491
8492 BUG_ON(ibm == NULL);
8493
8494 INIT_LIST_HEAD(&ibm->all_drivers);
8495
8496 if (ibm->flags.experimental && !experimental)
8497 return 0;
8498
8499 dbg_printk(TPACPI_DBG_INIT,
8500 "probing for %s\n", ibm->name);
8501
8502 if (iibm->init) {
8503 ret = iibm->init(iibm);
8504 if (ret > 0)
8505 return 0; /* probe failed */
8506 if (ret)
8507 return ret;
8508
8509 ibm->flags.init_called = 1;
8510 }
8511
8512 if (ibm->acpi) {
8513 if (ibm->acpi->hid) {
8514 ret = register_tpacpi_subdriver(ibm);
8515 if (ret)
8516 goto err_out;
8517 }
8518
8519 if (ibm->acpi->notify) {
8520 ret = setup_acpi_notify(ibm);
8521 if (ret == -ENODEV) {
8522 pr_notice("disabling subdriver %s\n",
8523 ibm->name);
8524 ret = 0;
8525 goto err_out;
8526 }
8527 if (ret < 0)
8528 goto err_out;
8529 }
8530 }
8531
8532 dbg_printk(TPACPI_DBG_INIT,
8533 "%s installed\n", ibm->name);
8534
8535 if (ibm->read) {
8536 mode_t mode = iibm->base_procfs_mode;
8537
8538 if (!mode)
8539 mode = S_IRUGO;
8540 if (ibm->write)
8541 mode |= S_IWUSR;
8542 entry = proc_create_data(ibm->name, mode, proc_dir,
8543 &dispatch_proc_fops, ibm);
8544 if (!entry) {
8545 pr_err("unable to create proc entry %s\n", ibm->name);
8546 ret = -ENODEV;
8547 goto err_out;
8548 }
8549 ibm->flags.proc_created = 1;
8550 }
8551
8552 list_add_tail(&ibm->all_drivers, &tpacpi_all_drivers);
8553
8554 return 0;
8555
8556 err_out:
8557 dbg_printk(TPACPI_DBG_INIT,
8558 "%s: at error exit path with result %d\n",
8559 ibm->name, ret);
8560
8561 ibm_exit(ibm);
8562 return (ret < 0)? ret : 0;
8563 }
8564
8565 /* Probing */
8566
8567 static bool __pure __init tpacpi_is_fw_digit(const char c)
8568 {
8569 return (c >= '0' && c <= '9') || (c >= 'A' && c <= 'Z');
8570 }
8571
8572 /* Most models: xxyTkkWW (#.##c); Ancient 570/600 and -SL lacks (#.##c) */
8573 static bool __pure __init tpacpi_is_valid_fw_id(const char* const s,
8574 const char t)
8575 {
8576 return s && strlen(s) >= 8 &&
8577 tpacpi_is_fw_digit(s[0]) &&
8578 tpacpi_is_fw_digit(s[1]) &&
8579 s[2] == t && s[3] == 'T' &&
8580 tpacpi_is_fw_digit(s[4]) &&
8581 tpacpi_is_fw_digit(s[5]);
8582 }
8583
8584 /* returns 0 - probe ok, or < 0 - probe error.
8585 * Probe ok doesn't mean thinkpad found.
8586 * On error, kfree() cleanup on tp->* is not performed, caller must do it */
8587 static int __must_check __init get_thinkpad_model_data(
8588 struct thinkpad_id_data *tp)
8589 {
8590 const struct dmi_device *dev = NULL;
8591 char ec_fw_string[18];
8592 char const *s;
8593
8594 if (!tp)
8595 return -EINVAL;
8596
8597 memset(tp, 0, sizeof(*tp));
8598
8599 if (dmi_name_in_vendors("IBM"))
8600 tp->vendor = PCI_VENDOR_ID_IBM;
8601 else if (dmi_name_in_vendors("LENOVO"))
8602 tp->vendor = PCI_VENDOR_ID_LENOVO;
8603 else
8604 return 0;
8605
8606 s = dmi_get_system_info(DMI_BIOS_VERSION);
8607 tp->bios_version_str = kstrdup(s, GFP_KERNEL);
8608 if (s && !tp->bios_version_str)
8609 return -ENOMEM;
8610
8611 /* Really ancient ThinkPad 240X will fail this, which is fine */
8612 if (!tpacpi_is_valid_fw_id(tp->bios_version_str, 'E'))
8613 return 0;
8614
8615 tp->bios_model = tp->bios_version_str[0]
8616 | (tp->bios_version_str[1] << 8);
8617 tp->bios_release = (tp->bios_version_str[4] << 8)
8618 | tp->bios_version_str[5];
8619
8620 /*
8621 * ThinkPad T23 or newer, A31 or newer, R50e or newer,
8622 * X32 or newer, all Z series; Some models must have an
8623 * up-to-date BIOS or they will not be detected.
8624 *
8625 * See http://thinkwiki.org/wiki/List_of_DMI_IDs
8626 */
8627 while ((dev = dmi_find_device(DMI_DEV_TYPE_OEM_STRING, NULL, dev))) {
8628 if (sscanf(dev->name,
8629 "IBM ThinkPad Embedded Controller -[%17c",
8630 ec_fw_string) == 1) {
8631 ec_fw_string[sizeof(ec_fw_string) - 1] = 0;
8632 ec_fw_string[strcspn(ec_fw_string, " ]")] = 0;
8633
8634 tp->ec_version_str = kstrdup(ec_fw_string, GFP_KERNEL);
8635 if (!tp->ec_version_str)
8636 return -ENOMEM;
8637
8638 if (tpacpi_is_valid_fw_id(ec_fw_string, 'H')) {
8639 tp->ec_model = ec_fw_string[0]
8640 | (ec_fw_string[1] << 8);
8641 tp->ec_release = (ec_fw_string[4] << 8)
8642 | ec_fw_string[5];
8643 } else {
8644 pr_notice("ThinkPad firmware release %s "
8645 "doesn't match the known patterns\n",
8646 ec_fw_string);
8647 pr_notice("please report this to %s\n",
8648 TPACPI_MAIL);
8649 }
8650 break;
8651 }
8652 }
8653
8654 s = dmi_get_system_info(DMI_PRODUCT_VERSION);
8655 if (s && !strnicmp(s, "ThinkPad", 8)) {
8656 tp->model_str = kstrdup(s, GFP_KERNEL);
8657 if (!tp->model_str)
8658 return -ENOMEM;
8659 }
8660
8661 s = dmi_get_system_info(DMI_PRODUCT_NAME);
8662 tp->nummodel_str = kstrdup(s, GFP_KERNEL);
8663 if (s && !tp->nummodel_str)
8664 return -ENOMEM;
8665
8666 return 0;
8667 }
8668
8669 static int __init probe_for_thinkpad(void)
8670 {
8671 int is_thinkpad;
8672
8673 if (acpi_disabled)
8674 return -ENODEV;
8675
8676 /* It would be dangerous to run the driver in this case */
8677 if (!tpacpi_is_ibm() && !tpacpi_is_lenovo())
8678 return -ENODEV;
8679
8680 /*
8681 * Non-ancient models have better DMI tagging, but very old models
8682 * don't. tpacpi_is_fw_known() is a cheat to help in that case.
8683 */
8684 is_thinkpad = (thinkpad_id.model_str != NULL) ||
8685 (thinkpad_id.ec_model != 0) ||
8686 tpacpi_is_fw_known();
8687
8688 /* The EC handler is required */
8689 tpacpi_acpi_handle_locate("ec", TPACPI_ACPI_EC_HID, &ec_handle);
8690 if (!ec_handle) {
8691 if (is_thinkpad)
8692 pr_err("Not yet supported ThinkPad detected!\n");
8693 return -ENODEV;
8694 }
8695
8696 if (!is_thinkpad && !force_load)
8697 return -ENODEV;
8698
8699 return 0;
8700 }
8701
8702 static void __init thinkpad_acpi_init_banner(void)
8703 {
8704 pr_info("%s v%s\n", TPACPI_DESC, TPACPI_VERSION);
8705 pr_info("%s\n", TPACPI_URL);
8706
8707 pr_info("ThinkPad BIOS %s, EC %s\n",
8708 (thinkpad_id.bios_version_str) ?
8709 thinkpad_id.bios_version_str : "unknown",
8710 (thinkpad_id.ec_version_str) ?
8711 thinkpad_id.ec_version_str : "unknown");
8712
8713 BUG_ON(!thinkpad_id.vendor);
8714
8715 if (thinkpad_id.model_str)
8716 pr_info("%s %s, model %s\n",
8717 (thinkpad_id.vendor == PCI_VENDOR_ID_IBM) ?
8718 "IBM" : ((thinkpad_id.vendor ==
8719 PCI_VENDOR_ID_LENOVO) ?
8720 "Lenovo" : "Unknown vendor"),
8721 thinkpad_id.model_str,
8722 (thinkpad_id.nummodel_str) ?
8723 thinkpad_id.nummodel_str : "unknown");
8724 }
8725
8726 /* Module init, exit, parameters */
8727
8728 static struct ibm_init_struct ibms_init[] __initdata = {
8729 {
8730 .data = &thinkpad_acpi_driver_data,
8731 },
8732 {
8733 .init = hotkey_init,
8734 .data = &hotkey_driver_data,
8735 },
8736 {
8737 .init = bluetooth_init,
8738 .data = &bluetooth_driver_data,
8739 },
8740 {
8741 .init = wan_init,
8742 .data = &wan_driver_data,
8743 },
8744 {
8745 .init = uwb_init,
8746 .data = &uwb_driver_data,
8747 },
8748 #ifdef CONFIG_THINKPAD_ACPI_VIDEO
8749 {
8750 .init = video_init,
8751 .base_procfs_mode = S_IRUSR,
8752 .data = &video_driver_data,
8753 },
8754 #endif
8755 {
8756 .init = light_init,
8757 .data = &light_driver_data,
8758 },
8759 {
8760 .init = cmos_init,
8761 .data = &cmos_driver_data,
8762 },
8763 {
8764 .init = led_init,
8765 .data = &led_driver_data,
8766 },
8767 {
8768 .init = beep_init,
8769 .data = &beep_driver_data,
8770 },
8771 {
8772 .init = thermal_init,
8773 .data = &thermal_driver_data,
8774 },
8775 {
8776 .init = brightness_init,
8777 .data = &brightness_driver_data,
8778 },
8779 {
8780 .init = volume_init,
8781 .data = &volume_driver_data,
8782 },
8783 {
8784 .init = fan_init,
8785 .data = &fan_driver_data,
8786 },
8787 };
8788
8789 static int __init set_ibm_param(const char *val, struct kernel_param *kp)
8790 {
8791 unsigned int i;
8792 struct ibm_struct *ibm;
8793
8794 if (!kp || !kp->name || !val)
8795 return -EINVAL;
8796
8797 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
8798 ibm = ibms_init[i].data;
8799 WARN_ON(ibm == NULL);
8800
8801 if (!ibm || !ibm->name)
8802 continue;
8803
8804 if (strcmp(ibm->name, kp->name) == 0 && ibm->write) {
8805 if (strlen(val) > sizeof(ibms_init[i].param) - 2)
8806 return -ENOSPC;
8807 strcpy(ibms_init[i].param, val);
8808 strcat(ibms_init[i].param, ",");
8809 return 0;
8810 }
8811 }
8812
8813 return -EINVAL;
8814 }
8815
8816 module_param(experimental, int, 0444);
8817 MODULE_PARM_DESC(experimental,
8818 "Enables experimental features when non-zero");
8819
8820 module_param_named(debug, dbg_level, uint, 0);
8821 MODULE_PARM_DESC(debug, "Sets debug level bit-mask");
8822
8823 module_param(force_load, bool, 0444);
8824 MODULE_PARM_DESC(force_load,
8825 "Attempts to load the driver even on a "
8826 "mis-identified ThinkPad when true");
8827
8828 module_param_named(fan_control, fan_control_allowed, bool, 0444);
8829 MODULE_PARM_DESC(fan_control,
8830 "Enables setting fan parameters features when true");
8831
8832 module_param_named(brightness_mode, brightness_mode, uint, 0444);
8833 MODULE_PARM_DESC(brightness_mode,
8834 "Selects brightness control strategy: "
8835 "0=auto, 1=EC, 2=UCMS, 3=EC+NVRAM");
8836
8837 module_param(brightness_enable, uint, 0444);
8838 MODULE_PARM_DESC(brightness_enable,
8839 "Enables backlight control when 1, disables when 0");
8840
8841 module_param(hotkey_report_mode, uint, 0444);
8842 MODULE_PARM_DESC(hotkey_report_mode,
8843 "used for backwards compatibility with userspace, "
8844 "see documentation");
8845
8846 #ifdef CONFIG_THINKPAD_ACPI_ALSA_SUPPORT
8847 module_param_named(volume_mode, volume_mode, uint, 0444);
8848 MODULE_PARM_DESC(volume_mode,
8849 "Selects volume control strategy: "
8850 "0=auto, 1=EC, 2=N/A, 3=EC+NVRAM");
8851
8852 module_param_named(volume_capabilities, volume_capabilities, uint, 0444);
8853 MODULE_PARM_DESC(volume_capabilities,
8854 "Selects the mixer capabilites: "
8855 "0=auto, 1=volume and mute, 2=mute only");
8856
8857 module_param_named(volume_control, volume_control_allowed, bool, 0444);
8858 MODULE_PARM_DESC(volume_control,
8859 "Enables software override for the console audio "
8860 "control when true");
8861
8862 /* ALSA module API parameters */
8863 module_param_named(index, alsa_index, int, 0444);
8864 MODULE_PARM_DESC(index, "ALSA index for the ACPI EC Mixer");
8865 module_param_named(id, alsa_id, charp, 0444);
8866 MODULE_PARM_DESC(id, "ALSA id for the ACPI EC Mixer");
8867 module_param_named(enable, alsa_enable, bool, 0444);
8868 MODULE_PARM_DESC(enable, "Enable the ALSA interface for the ACPI EC Mixer");
8869 #endif /* CONFIG_THINKPAD_ACPI_ALSA_SUPPORT */
8870
8871 #define TPACPI_PARAM(feature) \
8872 module_param_call(feature, set_ibm_param, NULL, NULL, 0); \
8873 MODULE_PARM_DESC(feature, "Simulates thinkpad-acpi procfs command " \
8874 "at module load, see documentation")
8875
8876 TPACPI_PARAM(hotkey);
8877 TPACPI_PARAM(bluetooth);
8878 TPACPI_PARAM(video);
8879 TPACPI_PARAM(light);
8880 TPACPI_PARAM(cmos);
8881 TPACPI_PARAM(led);
8882 TPACPI_PARAM(beep);
8883 TPACPI_PARAM(brightness);
8884 TPACPI_PARAM(volume);
8885 TPACPI_PARAM(fan);
8886
8887 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
8888 module_param(dbg_wlswemul, uint, 0444);
8889 MODULE_PARM_DESC(dbg_wlswemul, "Enables WLSW emulation");
8890 module_param_named(wlsw_state, tpacpi_wlsw_emulstate, bool, 0);
8891 MODULE_PARM_DESC(wlsw_state,
8892 "Initial state of the emulated WLSW switch");
8893
8894 module_param(dbg_bluetoothemul, uint, 0444);
8895 MODULE_PARM_DESC(dbg_bluetoothemul, "Enables bluetooth switch emulation");
8896 module_param_named(bluetooth_state, tpacpi_bluetooth_emulstate, bool, 0);
8897 MODULE_PARM_DESC(bluetooth_state,
8898 "Initial state of the emulated bluetooth switch");
8899
8900 module_param(dbg_wwanemul, uint, 0444);
8901 MODULE_PARM_DESC(dbg_wwanemul, "Enables WWAN switch emulation");
8902 module_param_named(wwan_state, tpacpi_wwan_emulstate, bool, 0);
8903 MODULE_PARM_DESC(wwan_state,
8904 "Initial state of the emulated WWAN switch");
8905
8906 module_param(dbg_uwbemul, uint, 0444);
8907 MODULE_PARM_DESC(dbg_uwbemul, "Enables UWB switch emulation");
8908 module_param_named(uwb_state, tpacpi_uwb_emulstate, bool, 0);
8909 MODULE_PARM_DESC(uwb_state,
8910 "Initial state of the emulated UWB switch");
8911 #endif
8912
8913 static void thinkpad_acpi_module_exit(void)
8914 {
8915 struct ibm_struct *ibm, *itmp;
8916
8917 tpacpi_lifecycle = TPACPI_LIFE_EXITING;
8918
8919 list_for_each_entry_safe_reverse(ibm, itmp,
8920 &tpacpi_all_drivers,
8921 all_drivers) {
8922 ibm_exit(ibm);
8923 }
8924
8925 dbg_printk(TPACPI_DBG_INIT, "finished subdriver exit path...\n");
8926
8927 if (tpacpi_inputdev) {
8928 if (tp_features.input_device_registered)
8929 input_unregister_device(tpacpi_inputdev);
8930 else
8931 input_free_device(tpacpi_inputdev);
8932 }
8933
8934 if (tpacpi_hwmon)
8935 hwmon_device_unregister(tpacpi_hwmon);
8936
8937 if (tp_features.sensors_pdev_attrs_registered)
8938 device_remove_file(&tpacpi_sensors_pdev->dev,
8939 &dev_attr_thinkpad_acpi_pdev_name);
8940 if (tpacpi_sensors_pdev)
8941 platform_device_unregister(tpacpi_sensors_pdev);
8942 if (tpacpi_pdev)
8943 platform_device_unregister(tpacpi_pdev);
8944
8945 if (tp_features.sensors_pdrv_attrs_registered)
8946 tpacpi_remove_driver_attributes(&tpacpi_hwmon_pdriver.driver);
8947 if (tp_features.platform_drv_attrs_registered)
8948 tpacpi_remove_driver_attributes(&tpacpi_pdriver.driver);
8949
8950 if (tp_features.sensors_pdrv_registered)
8951 platform_driver_unregister(&tpacpi_hwmon_pdriver);
8952
8953 if (tp_features.platform_drv_registered)
8954 platform_driver_unregister(&tpacpi_pdriver);
8955
8956 if (proc_dir)
8957 remove_proc_entry(TPACPI_PROC_DIR, acpi_root_dir);
8958
8959 if (tpacpi_wq)
8960 destroy_workqueue(tpacpi_wq);
8961
8962 kfree(thinkpad_id.bios_version_str);
8963 kfree(thinkpad_id.ec_version_str);
8964 kfree(thinkpad_id.model_str);
8965 }
8966
8967
8968 static int __init thinkpad_acpi_module_init(void)
8969 {
8970 int ret, i;
8971
8972 tpacpi_lifecycle = TPACPI_LIFE_INIT;
8973
8974 /* Parameter checking */
8975 if (hotkey_report_mode > 2)
8976 return -EINVAL;
8977
8978 /* Driver-level probe */
8979
8980 ret = get_thinkpad_model_data(&thinkpad_id);
8981 if (ret) {
8982 pr_err("unable to get DMI data: %d\n", ret);
8983 thinkpad_acpi_module_exit();
8984 return ret;
8985 }
8986 ret = probe_for_thinkpad();
8987 if (ret) {
8988 thinkpad_acpi_module_exit();
8989 return ret;
8990 }
8991
8992 /* Driver initialization */
8993
8994 thinkpad_acpi_init_banner();
8995 tpacpi_check_outdated_fw();
8996
8997 TPACPI_ACPIHANDLE_INIT(ecrd);
8998 TPACPI_ACPIHANDLE_INIT(ecwr);
8999
9000 tpacpi_wq = create_singlethread_workqueue(TPACPI_WORKQUEUE_NAME);
9001 if (!tpacpi_wq) {
9002 thinkpad_acpi_module_exit();
9003 return -ENOMEM;
9004 }
9005
9006 proc_dir = proc_mkdir(TPACPI_PROC_DIR, acpi_root_dir);
9007 if (!proc_dir) {
9008 pr_err("unable to create proc dir " TPACPI_PROC_DIR "\n");
9009 thinkpad_acpi_module_exit();
9010 return -ENODEV;
9011 }
9012
9013 ret = platform_driver_register(&tpacpi_pdriver);
9014 if (ret) {
9015 pr_err("unable to register main platform driver\n");
9016 thinkpad_acpi_module_exit();
9017 return ret;
9018 }
9019 tp_features.platform_drv_registered = 1;
9020
9021 ret = platform_driver_register(&tpacpi_hwmon_pdriver);
9022 if (ret) {
9023 pr_err("unable to register hwmon platform driver\n");
9024 thinkpad_acpi_module_exit();
9025 return ret;
9026 }
9027 tp_features.sensors_pdrv_registered = 1;
9028
9029 ret = tpacpi_create_driver_attributes(&tpacpi_pdriver.driver);
9030 if (!ret) {
9031 tp_features.platform_drv_attrs_registered = 1;
9032 ret = tpacpi_create_driver_attributes(
9033 &tpacpi_hwmon_pdriver.driver);
9034 }
9035 if (ret) {
9036 pr_err("unable to create sysfs driver attributes\n");
9037 thinkpad_acpi_module_exit();
9038 return ret;
9039 }
9040 tp_features.sensors_pdrv_attrs_registered = 1;
9041
9042
9043 /* Device initialization */
9044 tpacpi_pdev = platform_device_register_simple(TPACPI_DRVR_NAME, -1,
9045 NULL, 0);
9046 if (IS_ERR(tpacpi_pdev)) {
9047 ret = PTR_ERR(tpacpi_pdev);
9048 tpacpi_pdev = NULL;
9049 pr_err("unable to register platform device\n");
9050 thinkpad_acpi_module_exit();
9051 return ret;
9052 }
9053 tpacpi_sensors_pdev = platform_device_register_simple(
9054 TPACPI_HWMON_DRVR_NAME,
9055 -1, NULL, 0);
9056 if (IS_ERR(tpacpi_sensors_pdev)) {
9057 ret = PTR_ERR(tpacpi_sensors_pdev);
9058 tpacpi_sensors_pdev = NULL;
9059 pr_err("unable to register hwmon platform device\n");
9060 thinkpad_acpi_module_exit();
9061 return ret;
9062 }
9063 ret = device_create_file(&tpacpi_sensors_pdev->dev,
9064 &dev_attr_thinkpad_acpi_pdev_name);
9065 if (ret) {
9066 pr_err("unable to create sysfs hwmon device attributes\n");
9067 thinkpad_acpi_module_exit();
9068 return ret;
9069 }
9070 tp_features.sensors_pdev_attrs_registered = 1;
9071 tpacpi_hwmon = hwmon_device_register(&tpacpi_sensors_pdev->dev);
9072 if (IS_ERR(tpacpi_hwmon)) {
9073 ret = PTR_ERR(tpacpi_hwmon);
9074 tpacpi_hwmon = NULL;
9075 pr_err("unable to register hwmon device\n");
9076 thinkpad_acpi_module_exit();
9077 return ret;
9078 }
9079 mutex_init(&tpacpi_inputdev_send_mutex);
9080 tpacpi_inputdev = input_allocate_device();
9081 if (!tpacpi_inputdev) {
9082 pr_err("unable to allocate input device\n");
9083 thinkpad_acpi_module_exit();
9084 return -ENOMEM;
9085 } else {
9086 /* Prepare input device, but don't register */
9087 tpacpi_inputdev->name = "ThinkPad Extra Buttons";
9088 tpacpi_inputdev->phys = TPACPI_DRVR_NAME "/input0";
9089 tpacpi_inputdev->id.bustype = BUS_HOST;
9090 tpacpi_inputdev->id.vendor = thinkpad_id.vendor;
9091 tpacpi_inputdev->id.product = TPACPI_HKEY_INPUT_PRODUCT;
9092 tpacpi_inputdev->id.version = TPACPI_HKEY_INPUT_VERSION;
9093 tpacpi_inputdev->dev.parent = &tpacpi_pdev->dev;
9094 }
9095
9096 /* Init subdriver dependencies */
9097 tpacpi_detect_brightness_capabilities();
9098
9099 /* Init subdrivers */
9100 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
9101 ret = ibm_init(&ibms_init[i]);
9102 if (ret >= 0 && *ibms_init[i].param)
9103 ret = ibms_init[i].data->write(ibms_init[i].param);
9104 if (ret < 0) {
9105 thinkpad_acpi_module_exit();
9106 return ret;
9107 }
9108 }
9109
9110 tpacpi_lifecycle = TPACPI_LIFE_RUNNING;
9111
9112 ret = input_register_device(tpacpi_inputdev);
9113 if (ret < 0) {
9114 pr_err("unable to register input device\n");
9115 thinkpad_acpi_module_exit();
9116 return ret;
9117 } else {
9118 tp_features.input_device_registered = 1;
9119 }
9120
9121 return 0;
9122 }
9123
9124 MODULE_ALIAS(TPACPI_DRVR_SHORTNAME);
9125
9126 /*
9127 * This will autoload the driver in almost every ThinkPad
9128 * in widespread use.
9129 *
9130 * Only _VERY_ old models, like the 240, 240x and 570 lack
9131 * the HKEY event interface.
9132 */
9133 MODULE_DEVICE_TABLE(acpi, ibm_htk_device_ids);
9134
9135 /*
9136 * DMI matching for module autoloading
9137 *
9138 * See http://thinkwiki.org/wiki/List_of_DMI_IDs
9139 * See http://thinkwiki.org/wiki/BIOS_Upgrade_Downloads
9140 *
9141 * Only models listed in thinkwiki will be supported, so add yours
9142 * if it is not there yet.
9143 */
9144 #define IBM_BIOS_MODULE_ALIAS(__type) \
9145 MODULE_ALIAS("dmi:bvnIBM:bvr" __type "ET??WW*")
9146
9147 /* Ancient thinkpad BIOSes have to be identified by
9148 * BIOS type or model number, and there are far less
9149 * BIOS types than model numbers... */
9150 IBM_BIOS_MODULE_ALIAS("I[MU]"); /* 570, 570e */
9151
9152 MODULE_AUTHOR("Borislav Deianov <borislav@users.sf.net>");
9153 MODULE_AUTHOR("Henrique de Moraes Holschuh <hmh@hmh.eng.br>");
9154 MODULE_DESCRIPTION(TPACPI_DESC);
9155 MODULE_VERSION(TPACPI_VERSION);
9156 MODULE_LICENSE("GPL");
9157
9158 module_init(thinkpad_acpi_module_init);
9159 module_exit(thinkpad_acpi_module_exit);
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree