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Merge branch 'x86-efi-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git...
[mirror_ubuntu-bionic-kernel.git] / drivers / platform / x86 / thinkpad_acpi.c
1 /*
2 * thinkpad_acpi.c - ThinkPad ACPI Extras
3 *
4 *
5 * Copyright (C) 2004-2005 Borislav Deianov <borislav@users.sf.net>
6 * Copyright (C) 2006-2009 Henrique de Moraes Holschuh <hmh@hmh.eng.br>
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
21 * 02110-1301, USA.
22 */
23
24 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
25
26 #define TPACPI_VERSION "0.24"
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) (void);
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 umode_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 bool tpacpi_wlsw_emulstate;
382 static int dbg_bluetoothemul;
383 static bool tpacpi_bluetooth_emulstate;
384 static int dbg_wwanemul;
385 static bool tpacpi_wwan_emulstate;
386 static int dbg_uwbemul;
387 static bool 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 * const object##_parent __initconst = \
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 int *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 *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_inode(file))->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 #ifdef CONFIG_PM_SLEEP
926 static int tpacpi_suspend_handler(struct device *dev)
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)();
935 }
936
937 return 0;
938 }
939
940 static int tpacpi_resume_handler(struct device *dev)
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 #endif
954
955 static SIMPLE_DEV_PM_OPS(tpacpi_pm,
956 tpacpi_suspend_handler, tpacpi_resume_handler);
957
958 static void tpacpi_shutdown_handler(struct platform_device *pdev)
959 {
960 struct ibm_struct *ibm, *itmp;
961
962 list_for_each_entry_safe(ibm, itmp,
963 &tpacpi_all_drivers,
964 all_drivers) {
965 if (ibm->shutdown)
966 (ibm->shutdown)();
967 }
968 }
969
970 static struct platform_driver tpacpi_pdriver = {
971 .driver = {
972 .name = TPACPI_DRVR_NAME,
973 .owner = THIS_MODULE,
974 .pm = &tpacpi_pm,
975 },
976 .shutdown = tpacpi_shutdown_handler,
977 };
978
979 static struct platform_driver tpacpi_hwmon_pdriver = {
980 .driver = {
981 .name = TPACPI_HWMON_DRVR_NAME,
982 .owner = THIS_MODULE,
983 },
984 };
985
986 /*************************************************************************
987 * sysfs support helpers
988 */
989
990 struct attribute_set {
991 unsigned int members, max_members;
992 struct attribute_group group;
993 };
994
995 struct attribute_set_obj {
996 struct attribute_set s;
997 struct attribute *a;
998 } __attribute__((packed));
999
1000 static struct attribute_set *create_attr_set(unsigned int max_members,
1001 const char *name)
1002 {
1003 struct attribute_set_obj *sobj;
1004
1005 if (max_members == 0)
1006 return NULL;
1007
1008 /* Allocates space for implicit NULL at the end too */
1009 sobj = kzalloc(sizeof(struct attribute_set_obj) +
1010 max_members * sizeof(struct attribute *),
1011 GFP_KERNEL);
1012 if (!sobj)
1013 return NULL;
1014 sobj->s.max_members = max_members;
1015 sobj->s.group.attrs = &sobj->a;
1016 sobj->s.group.name = name;
1017
1018 return &sobj->s;
1019 }
1020
1021 #define destroy_attr_set(_set) \
1022 kfree(_set);
1023
1024 /* not multi-threaded safe, use it in a single thread per set */
1025 static int add_to_attr_set(struct attribute_set *s, struct attribute *attr)
1026 {
1027 if (!s || !attr)
1028 return -EINVAL;
1029
1030 if (s->members >= s->max_members)
1031 return -ENOMEM;
1032
1033 s->group.attrs[s->members] = attr;
1034 s->members++;
1035
1036 return 0;
1037 }
1038
1039 static int add_many_to_attr_set(struct attribute_set *s,
1040 struct attribute **attr,
1041 unsigned int count)
1042 {
1043 int i, res;
1044
1045 for (i = 0; i < count; i++) {
1046 res = add_to_attr_set(s, attr[i]);
1047 if (res)
1048 return res;
1049 }
1050
1051 return 0;
1052 }
1053
1054 static void delete_attr_set(struct attribute_set *s, struct kobject *kobj)
1055 {
1056 sysfs_remove_group(kobj, &s->group);
1057 destroy_attr_set(s);
1058 }
1059
1060 #define register_attr_set_with_sysfs(_attr_set, _kobj) \
1061 sysfs_create_group(_kobj, &_attr_set->group)
1062
1063 static int parse_strtoul(const char *buf,
1064 unsigned long max, unsigned long *value)
1065 {
1066 char *endp;
1067
1068 *value = simple_strtoul(skip_spaces(buf), &endp, 0);
1069 endp = skip_spaces(endp);
1070 if (*endp || *value > max)
1071 return -EINVAL;
1072
1073 return 0;
1074 }
1075
1076 static void tpacpi_disable_brightness_delay(void)
1077 {
1078 if (acpi_evalf(hkey_handle, NULL, "PWMS", "qvd", 0))
1079 pr_notice("ACPI backlight control delay disabled\n");
1080 }
1081
1082 static void printk_deprecated_attribute(const char * const what,
1083 const char * const details)
1084 {
1085 tpacpi_log_usertask("deprecated sysfs attribute");
1086 pr_warn("WARNING: sysfs attribute %s is deprecated and "
1087 "will be removed. %s\n",
1088 what, details);
1089 }
1090
1091 /*************************************************************************
1092 * rfkill and radio control support helpers
1093 */
1094
1095 /*
1096 * ThinkPad-ACPI firmware handling model:
1097 *
1098 * WLSW (master wireless switch) is event-driven, and is common to all
1099 * firmware-controlled radios. It cannot be controlled, just monitored,
1100 * as expected. It overrides all radio state in firmware
1101 *
1102 * The kernel, a masked-off hotkey, and WLSW can change the radio state
1103 * (TODO: verify how WLSW interacts with the returned radio state).
1104 *
1105 * The only time there are shadow radio state changes, is when
1106 * masked-off hotkeys are used.
1107 */
1108
1109 /*
1110 * Internal driver API for radio state:
1111 *
1112 * int: < 0 = error, otherwise enum tpacpi_rfkill_state
1113 * bool: true means radio blocked (off)
1114 */
1115 enum tpacpi_rfkill_state {
1116 TPACPI_RFK_RADIO_OFF = 0,
1117 TPACPI_RFK_RADIO_ON
1118 };
1119
1120 /* rfkill switches */
1121 enum tpacpi_rfk_id {
1122 TPACPI_RFK_BLUETOOTH_SW_ID = 0,
1123 TPACPI_RFK_WWAN_SW_ID,
1124 TPACPI_RFK_UWB_SW_ID,
1125 TPACPI_RFK_SW_MAX
1126 };
1127
1128 static const char *tpacpi_rfkill_names[] = {
1129 [TPACPI_RFK_BLUETOOTH_SW_ID] = "bluetooth",
1130 [TPACPI_RFK_WWAN_SW_ID] = "wwan",
1131 [TPACPI_RFK_UWB_SW_ID] = "uwb",
1132 [TPACPI_RFK_SW_MAX] = NULL
1133 };
1134
1135 /* ThinkPad-ACPI rfkill subdriver */
1136 struct tpacpi_rfk {
1137 struct rfkill *rfkill;
1138 enum tpacpi_rfk_id id;
1139 const struct tpacpi_rfk_ops *ops;
1140 };
1141
1142 struct tpacpi_rfk_ops {
1143 /* firmware interface */
1144 int (*get_status)(void);
1145 int (*set_status)(const enum tpacpi_rfkill_state);
1146 };
1147
1148 static struct tpacpi_rfk *tpacpi_rfkill_switches[TPACPI_RFK_SW_MAX];
1149
1150 /* Query FW and update rfkill sw state for a given rfkill switch */
1151 static int tpacpi_rfk_update_swstate(const struct tpacpi_rfk *tp_rfk)
1152 {
1153 int status;
1154
1155 if (!tp_rfk)
1156 return -ENODEV;
1157
1158 status = (tp_rfk->ops->get_status)();
1159 if (status < 0)
1160 return status;
1161
1162 rfkill_set_sw_state(tp_rfk->rfkill,
1163 (status == TPACPI_RFK_RADIO_OFF));
1164
1165 return status;
1166 }
1167
1168 /* Query FW and update rfkill sw state for all rfkill switches */
1169 static void tpacpi_rfk_update_swstate_all(void)
1170 {
1171 unsigned int i;
1172
1173 for (i = 0; i < TPACPI_RFK_SW_MAX; i++)
1174 tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[i]);
1175 }
1176
1177 /*
1178 * Sync the HW-blocking state of all rfkill switches,
1179 * do notice it causes the rfkill core to schedule uevents
1180 */
1181 static void tpacpi_rfk_update_hwblock_state(bool blocked)
1182 {
1183 unsigned int i;
1184 struct tpacpi_rfk *tp_rfk;
1185
1186 for (i = 0; i < TPACPI_RFK_SW_MAX; i++) {
1187 tp_rfk = tpacpi_rfkill_switches[i];
1188 if (tp_rfk) {
1189 if (rfkill_set_hw_state(tp_rfk->rfkill,
1190 blocked)) {
1191 /* ignore -- we track sw block */
1192 }
1193 }
1194 }
1195 }
1196
1197 /* Call to get the WLSW state from the firmware */
1198 static int hotkey_get_wlsw(void);
1199
1200 /* Call to query WLSW state and update all rfkill switches */
1201 static bool tpacpi_rfk_check_hwblock_state(void)
1202 {
1203 int res = hotkey_get_wlsw();
1204 int hw_blocked;
1205
1206 /* When unknown or unsupported, we have to assume it is unblocked */
1207 if (res < 0)
1208 return false;
1209
1210 hw_blocked = (res == TPACPI_RFK_RADIO_OFF);
1211 tpacpi_rfk_update_hwblock_state(hw_blocked);
1212
1213 return hw_blocked;
1214 }
1215
1216 static int tpacpi_rfk_hook_set_block(void *data, bool blocked)
1217 {
1218 struct tpacpi_rfk *tp_rfk = data;
1219 int res;
1220
1221 dbg_printk(TPACPI_DBG_RFKILL,
1222 "request to change radio state to %s\n",
1223 blocked ? "blocked" : "unblocked");
1224
1225 /* try to set radio state */
1226 res = (tp_rfk->ops->set_status)(blocked ?
1227 TPACPI_RFK_RADIO_OFF : TPACPI_RFK_RADIO_ON);
1228
1229 /* and update the rfkill core with whatever the FW really did */
1230 tpacpi_rfk_update_swstate(tp_rfk);
1231
1232 return (res < 0) ? res : 0;
1233 }
1234
1235 static const struct rfkill_ops tpacpi_rfk_rfkill_ops = {
1236 .set_block = tpacpi_rfk_hook_set_block,
1237 };
1238
1239 static int __init tpacpi_new_rfkill(const enum tpacpi_rfk_id id,
1240 const struct tpacpi_rfk_ops *tp_rfkops,
1241 const enum rfkill_type rfktype,
1242 const char *name,
1243 const bool set_default)
1244 {
1245 struct tpacpi_rfk *atp_rfk;
1246 int res;
1247 bool sw_state = false;
1248 bool hw_state;
1249 int sw_status;
1250
1251 BUG_ON(id >= TPACPI_RFK_SW_MAX || tpacpi_rfkill_switches[id]);
1252
1253 atp_rfk = kzalloc(sizeof(struct tpacpi_rfk), GFP_KERNEL);
1254 if (atp_rfk)
1255 atp_rfk->rfkill = rfkill_alloc(name,
1256 &tpacpi_pdev->dev,
1257 rfktype,
1258 &tpacpi_rfk_rfkill_ops,
1259 atp_rfk);
1260 if (!atp_rfk || !atp_rfk->rfkill) {
1261 pr_err("failed to allocate memory for rfkill class\n");
1262 kfree(atp_rfk);
1263 return -ENOMEM;
1264 }
1265
1266 atp_rfk->id = id;
1267 atp_rfk->ops = tp_rfkops;
1268
1269 sw_status = (tp_rfkops->get_status)();
1270 if (sw_status < 0) {
1271 pr_err("failed to read initial state for %s, error %d\n",
1272 name, sw_status);
1273 } else {
1274 sw_state = (sw_status == TPACPI_RFK_RADIO_OFF);
1275 if (set_default) {
1276 /* try to keep the initial state, since we ask the
1277 * firmware to preserve it across S5 in NVRAM */
1278 rfkill_init_sw_state(atp_rfk->rfkill, sw_state);
1279 }
1280 }
1281 hw_state = tpacpi_rfk_check_hwblock_state();
1282 rfkill_set_hw_state(atp_rfk->rfkill, hw_state);
1283
1284 res = rfkill_register(atp_rfk->rfkill);
1285 if (res < 0) {
1286 pr_err("failed to register %s rfkill switch: %d\n", name, res);
1287 rfkill_destroy(atp_rfk->rfkill);
1288 kfree(atp_rfk);
1289 return res;
1290 }
1291
1292 tpacpi_rfkill_switches[id] = atp_rfk;
1293
1294 pr_info("rfkill switch %s: radio is %sblocked\n",
1295 name, (sw_state || hw_state) ? "" : "un");
1296 return 0;
1297 }
1298
1299 static void tpacpi_destroy_rfkill(const enum tpacpi_rfk_id id)
1300 {
1301 struct tpacpi_rfk *tp_rfk;
1302
1303 BUG_ON(id >= TPACPI_RFK_SW_MAX);
1304
1305 tp_rfk = tpacpi_rfkill_switches[id];
1306 if (tp_rfk) {
1307 rfkill_unregister(tp_rfk->rfkill);
1308 rfkill_destroy(tp_rfk->rfkill);
1309 tpacpi_rfkill_switches[id] = NULL;
1310 kfree(tp_rfk);
1311 }
1312 }
1313
1314 static void printk_deprecated_rfkill_attribute(const char * const what)
1315 {
1316 printk_deprecated_attribute(what,
1317 "Please switch to generic rfkill before year 2010");
1318 }
1319
1320 /* sysfs <radio> enable ------------------------------------------------ */
1321 static ssize_t tpacpi_rfk_sysfs_enable_show(const enum tpacpi_rfk_id id,
1322 struct device_attribute *attr,
1323 char *buf)
1324 {
1325 int status;
1326
1327 printk_deprecated_rfkill_attribute(attr->attr.name);
1328
1329 /* This is in the ABI... */
1330 if (tpacpi_rfk_check_hwblock_state()) {
1331 status = TPACPI_RFK_RADIO_OFF;
1332 } else {
1333 status = tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]);
1334 if (status < 0)
1335 return status;
1336 }
1337
1338 return snprintf(buf, PAGE_SIZE, "%d\n",
1339 (status == TPACPI_RFK_RADIO_ON) ? 1 : 0);
1340 }
1341
1342 static ssize_t tpacpi_rfk_sysfs_enable_store(const enum tpacpi_rfk_id id,
1343 struct device_attribute *attr,
1344 const char *buf, size_t count)
1345 {
1346 unsigned long t;
1347 int res;
1348
1349 printk_deprecated_rfkill_attribute(attr->attr.name);
1350
1351 if (parse_strtoul(buf, 1, &t))
1352 return -EINVAL;
1353
1354 tpacpi_disclose_usertask(attr->attr.name, "set to %ld\n", t);
1355
1356 /* This is in the ABI... */
1357 if (tpacpi_rfk_check_hwblock_state() && !!t)
1358 return -EPERM;
1359
1360 res = tpacpi_rfkill_switches[id]->ops->set_status((!!t) ?
1361 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF);
1362 tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]);
1363
1364 return (res < 0) ? res : count;
1365 }
1366
1367 /* procfs -------------------------------------------------------------- */
1368 static int tpacpi_rfk_procfs_read(const enum tpacpi_rfk_id id, struct seq_file *m)
1369 {
1370 if (id >= TPACPI_RFK_SW_MAX)
1371 seq_printf(m, "status:\t\tnot supported\n");
1372 else {
1373 int status;
1374
1375 /* This is in the ABI... */
1376 if (tpacpi_rfk_check_hwblock_state()) {
1377 status = TPACPI_RFK_RADIO_OFF;
1378 } else {
1379 status = tpacpi_rfk_update_swstate(
1380 tpacpi_rfkill_switches[id]);
1381 if (status < 0)
1382 return status;
1383 }
1384
1385 seq_printf(m, "status:\t\t%s\n",
1386 (status == TPACPI_RFK_RADIO_ON) ?
1387 "enabled" : "disabled");
1388 seq_printf(m, "commands:\tenable, disable\n");
1389 }
1390
1391 return 0;
1392 }
1393
1394 static int tpacpi_rfk_procfs_write(const enum tpacpi_rfk_id id, char *buf)
1395 {
1396 char *cmd;
1397 int status = -1;
1398 int res = 0;
1399
1400 if (id >= TPACPI_RFK_SW_MAX)
1401 return -ENODEV;
1402
1403 while ((cmd = next_cmd(&buf))) {
1404 if (strlencmp(cmd, "enable") == 0)
1405 status = TPACPI_RFK_RADIO_ON;
1406 else if (strlencmp(cmd, "disable") == 0)
1407 status = TPACPI_RFK_RADIO_OFF;
1408 else
1409 return -EINVAL;
1410 }
1411
1412 if (status != -1) {
1413 tpacpi_disclose_usertask("procfs", "attempt to %s %s\n",
1414 (status == TPACPI_RFK_RADIO_ON) ?
1415 "enable" : "disable",
1416 tpacpi_rfkill_names[id]);
1417 res = (tpacpi_rfkill_switches[id]->ops->set_status)(status);
1418 tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]);
1419 }
1420
1421 return res;
1422 }
1423
1424 /*************************************************************************
1425 * thinkpad-acpi driver attributes
1426 */
1427
1428 /* interface_version --------------------------------------------------- */
1429 static ssize_t tpacpi_driver_interface_version_show(
1430 struct device_driver *drv,
1431 char *buf)
1432 {
1433 return snprintf(buf, PAGE_SIZE, "0x%08x\n", TPACPI_SYSFS_VERSION);
1434 }
1435
1436 static DRIVER_ATTR(interface_version, S_IRUGO,
1437 tpacpi_driver_interface_version_show, NULL);
1438
1439 /* debug_level --------------------------------------------------------- */
1440 static ssize_t tpacpi_driver_debug_show(struct device_driver *drv,
1441 char *buf)
1442 {
1443 return snprintf(buf, PAGE_SIZE, "0x%04x\n", dbg_level);
1444 }
1445
1446 static ssize_t tpacpi_driver_debug_store(struct device_driver *drv,
1447 const char *buf, size_t count)
1448 {
1449 unsigned long t;
1450
1451 if (parse_strtoul(buf, 0xffff, &t))
1452 return -EINVAL;
1453
1454 dbg_level = t;
1455
1456 return count;
1457 }
1458
1459 static DRIVER_ATTR(debug_level, S_IWUSR | S_IRUGO,
1460 tpacpi_driver_debug_show, tpacpi_driver_debug_store);
1461
1462 /* version ------------------------------------------------------------- */
1463 static ssize_t tpacpi_driver_version_show(struct device_driver *drv,
1464 char *buf)
1465 {
1466 return snprintf(buf, PAGE_SIZE, "%s v%s\n",
1467 TPACPI_DESC, TPACPI_VERSION);
1468 }
1469
1470 static DRIVER_ATTR(version, S_IRUGO,
1471 tpacpi_driver_version_show, NULL);
1472
1473 /* --------------------------------------------------------------------- */
1474
1475 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
1476
1477 /* wlsw_emulstate ------------------------------------------------------ */
1478 static ssize_t tpacpi_driver_wlsw_emulstate_show(struct device_driver *drv,
1479 char *buf)
1480 {
1481 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_wlsw_emulstate);
1482 }
1483
1484 static ssize_t tpacpi_driver_wlsw_emulstate_store(struct device_driver *drv,
1485 const char *buf, size_t count)
1486 {
1487 unsigned long t;
1488
1489 if (parse_strtoul(buf, 1, &t))
1490 return -EINVAL;
1491
1492 if (tpacpi_wlsw_emulstate != !!t) {
1493 tpacpi_wlsw_emulstate = !!t;
1494 tpacpi_rfk_update_hwblock_state(!t); /* negative logic */
1495 }
1496
1497 return count;
1498 }
1499
1500 static DRIVER_ATTR(wlsw_emulstate, S_IWUSR | S_IRUGO,
1501 tpacpi_driver_wlsw_emulstate_show,
1502 tpacpi_driver_wlsw_emulstate_store);
1503
1504 /* bluetooth_emulstate ------------------------------------------------- */
1505 static ssize_t tpacpi_driver_bluetooth_emulstate_show(
1506 struct device_driver *drv,
1507 char *buf)
1508 {
1509 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_bluetooth_emulstate);
1510 }
1511
1512 static ssize_t tpacpi_driver_bluetooth_emulstate_store(
1513 struct device_driver *drv,
1514 const char *buf, size_t count)
1515 {
1516 unsigned long t;
1517
1518 if (parse_strtoul(buf, 1, &t))
1519 return -EINVAL;
1520
1521 tpacpi_bluetooth_emulstate = !!t;
1522
1523 return count;
1524 }
1525
1526 static DRIVER_ATTR(bluetooth_emulstate, S_IWUSR | S_IRUGO,
1527 tpacpi_driver_bluetooth_emulstate_show,
1528 tpacpi_driver_bluetooth_emulstate_store);
1529
1530 /* wwan_emulstate ------------------------------------------------- */
1531 static ssize_t tpacpi_driver_wwan_emulstate_show(
1532 struct device_driver *drv,
1533 char *buf)
1534 {
1535 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_wwan_emulstate);
1536 }
1537
1538 static ssize_t tpacpi_driver_wwan_emulstate_store(
1539 struct device_driver *drv,
1540 const char *buf, size_t count)
1541 {
1542 unsigned long t;
1543
1544 if (parse_strtoul(buf, 1, &t))
1545 return -EINVAL;
1546
1547 tpacpi_wwan_emulstate = !!t;
1548
1549 return count;
1550 }
1551
1552 static DRIVER_ATTR(wwan_emulstate, S_IWUSR | S_IRUGO,
1553 tpacpi_driver_wwan_emulstate_show,
1554 tpacpi_driver_wwan_emulstate_store);
1555
1556 /* uwb_emulstate ------------------------------------------------- */
1557 static ssize_t tpacpi_driver_uwb_emulstate_show(
1558 struct device_driver *drv,
1559 char *buf)
1560 {
1561 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_uwb_emulstate);
1562 }
1563
1564 static ssize_t tpacpi_driver_uwb_emulstate_store(
1565 struct device_driver *drv,
1566 const char *buf, size_t count)
1567 {
1568 unsigned long t;
1569
1570 if (parse_strtoul(buf, 1, &t))
1571 return -EINVAL;
1572
1573 tpacpi_uwb_emulstate = !!t;
1574
1575 return count;
1576 }
1577
1578 static DRIVER_ATTR(uwb_emulstate, S_IWUSR | S_IRUGO,
1579 tpacpi_driver_uwb_emulstate_show,
1580 tpacpi_driver_uwb_emulstate_store);
1581 #endif
1582
1583 /* --------------------------------------------------------------------- */
1584
1585 static struct driver_attribute *tpacpi_driver_attributes[] = {
1586 &driver_attr_debug_level, &driver_attr_version,
1587 &driver_attr_interface_version,
1588 };
1589
1590 static int __init tpacpi_create_driver_attributes(struct device_driver *drv)
1591 {
1592 int i, res;
1593
1594 i = 0;
1595 res = 0;
1596 while (!res && i < ARRAY_SIZE(tpacpi_driver_attributes)) {
1597 res = driver_create_file(drv, tpacpi_driver_attributes[i]);
1598 i++;
1599 }
1600
1601 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
1602 if (!res && dbg_wlswemul)
1603 res = driver_create_file(drv, &driver_attr_wlsw_emulstate);
1604 if (!res && dbg_bluetoothemul)
1605 res = driver_create_file(drv, &driver_attr_bluetooth_emulstate);
1606 if (!res && dbg_wwanemul)
1607 res = driver_create_file(drv, &driver_attr_wwan_emulstate);
1608 if (!res && dbg_uwbemul)
1609 res = driver_create_file(drv, &driver_attr_uwb_emulstate);
1610 #endif
1611
1612 return res;
1613 }
1614
1615 static void tpacpi_remove_driver_attributes(struct device_driver *drv)
1616 {
1617 int i;
1618
1619 for (i = 0; i < ARRAY_SIZE(tpacpi_driver_attributes); i++)
1620 driver_remove_file(drv, tpacpi_driver_attributes[i]);
1621
1622 #ifdef THINKPAD_ACPI_DEBUGFACILITIES
1623 driver_remove_file(drv, &driver_attr_wlsw_emulstate);
1624 driver_remove_file(drv, &driver_attr_bluetooth_emulstate);
1625 driver_remove_file(drv, &driver_attr_wwan_emulstate);
1626 driver_remove_file(drv, &driver_attr_uwb_emulstate);
1627 #endif
1628 }
1629
1630 /*************************************************************************
1631 * Firmware Data
1632 */
1633
1634 /*
1635 * Table of recommended minimum BIOS versions
1636 *
1637 * Reasons for listing:
1638 * 1. Stable BIOS, listed because the unknown amount of
1639 * bugs and bad ACPI behaviour on older versions
1640 *
1641 * 2. BIOS or EC fw with known bugs that trigger on Linux
1642 *
1643 * 3. BIOS with known reduced functionality in older versions
1644 *
1645 * We recommend the latest BIOS and EC version.
1646 * We only support the latest BIOS and EC fw version as a rule.
1647 *
1648 * Sources: IBM ThinkPad Public Web Documents (update changelogs),
1649 * Information from users in ThinkWiki
1650 *
1651 * WARNING: we use this table also to detect that the machine is
1652 * a ThinkPad in some cases, so don't remove entries lightly.
1653 */
1654
1655 #define TPV_Q(__v, __id1, __id2, __bv1, __bv2) \
1656 { .vendor = (__v), \
1657 .bios = TPID(__id1, __id2), \
1658 .ec = TPACPI_MATCH_ANY, \
1659 .quirks = TPACPI_MATCH_ANY << 16 \
1660 | (__bv1) << 8 | (__bv2) }
1661
1662 #define TPV_Q_X(__v, __bid1, __bid2, __bv1, __bv2, \
1663 __eid, __ev1, __ev2) \
1664 { .vendor = (__v), \
1665 .bios = TPID(__bid1, __bid2), \
1666 .ec = __eid, \
1667 .quirks = (__ev1) << 24 | (__ev2) << 16 \
1668 | (__bv1) << 8 | (__bv2) }
1669
1670 #define TPV_QI0(__id1, __id2, __bv1, __bv2) \
1671 TPV_Q(PCI_VENDOR_ID_IBM, __id1, __id2, __bv1, __bv2)
1672
1673 /* Outdated IBM BIOSes often lack the EC id string */
1674 #define TPV_QI1(__id1, __id2, __bv1, __bv2, __ev1, __ev2) \
1675 TPV_Q_X(PCI_VENDOR_ID_IBM, __id1, __id2, \
1676 __bv1, __bv2, TPID(__id1, __id2), \
1677 __ev1, __ev2), \
1678 TPV_Q_X(PCI_VENDOR_ID_IBM, __id1, __id2, \
1679 __bv1, __bv2, TPACPI_MATCH_UNKNOWN, \
1680 __ev1, __ev2)
1681
1682 /* Outdated IBM BIOSes often lack the EC id string */
1683 #define TPV_QI2(__bid1, __bid2, __bv1, __bv2, \
1684 __eid1, __eid2, __ev1, __ev2) \
1685 TPV_Q_X(PCI_VENDOR_ID_IBM, __bid1, __bid2, \
1686 __bv1, __bv2, TPID(__eid1, __eid2), \
1687 __ev1, __ev2), \
1688 TPV_Q_X(PCI_VENDOR_ID_IBM, __bid1, __bid2, \
1689 __bv1, __bv2, TPACPI_MATCH_UNKNOWN, \
1690 __ev1, __ev2)
1691
1692 #define TPV_QL0(__id1, __id2, __bv1, __bv2) \
1693 TPV_Q(PCI_VENDOR_ID_LENOVO, __id1, __id2, __bv1, __bv2)
1694
1695 #define TPV_QL1(__id1, __id2, __bv1, __bv2, __ev1, __ev2) \
1696 TPV_Q_X(PCI_VENDOR_ID_LENOVO, __id1, __id2, \
1697 __bv1, __bv2, TPID(__id1, __id2), \
1698 __ev1, __ev2)
1699
1700 #define TPV_QL2(__bid1, __bid2, __bv1, __bv2, \
1701 __eid1, __eid2, __ev1, __ev2) \
1702 TPV_Q_X(PCI_VENDOR_ID_LENOVO, __bid1, __bid2, \
1703 __bv1, __bv2, TPID(__eid1, __eid2), \
1704 __ev1, __ev2)
1705
1706 static const struct tpacpi_quirk tpacpi_bios_version_qtable[] __initconst = {
1707 /* Numeric models ------------------ */
1708 /* FW MODEL BIOS VERS */
1709 TPV_QI0('I', 'M', '6', '5'), /* 570 */
1710 TPV_QI0('I', 'U', '2', '6'), /* 570E */
1711 TPV_QI0('I', 'B', '5', '4'), /* 600 */
1712 TPV_QI0('I', 'H', '4', '7'), /* 600E */
1713 TPV_QI0('I', 'N', '3', '6'), /* 600E */
1714 TPV_QI0('I', 'T', '5', '5'), /* 600X */
1715 TPV_QI0('I', 'D', '4', '8'), /* 770, 770E, 770ED */
1716 TPV_QI0('I', 'I', '4', '2'), /* 770X */
1717 TPV_QI0('I', 'O', '2', '3'), /* 770Z */
1718
1719 /* A-series ------------------------- */
1720 /* FW MODEL BIOS VERS EC VERS */
1721 TPV_QI0('I', 'W', '5', '9'), /* A20m */
1722 TPV_QI0('I', 'V', '6', '9'), /* A20p */
1723 TPV_QI0('1', '0', '2', '6'), /* A21e, A22e */
1724 TPV_QI0('K', 'U', '3', '6'), /* A21e */
1725 TPV_QI0('K', 'X', '3', '6'), /* A21m, A22m */
1726 TPV_QI0('K', 'Y', '3', '8'), /* A21p, A22p */
1727 TPV_QI0('1', 'B', '1', '7'), /* A22e */
1728 TPV_QI0('1', '3', '2', '0'), /* A22m */
1729 TPV_QI0('1', 'E', '7', '3'), /* A30/p (0) */
1730 TPV_QI1('1', 'G', '4', '1', '1', '7'), /* A31/p (0) */
1731 TPV_QI1('1', 'N', '1', '6', '0', '7'), /* A31/p (0) */
1732
1733 /* G-series ------------------------- */
1734 /* FW MODEL BIOS VERS */
1735 TPV_QI0('1', 'T', 'A', '6'), /* G40 */
1736 TPV_QI0('1', 'X', '5', '7'), /* G41 */
1737
1738 /* R-series, T-series --------------- */
1739 /* FW MODEL BIOS VERS EC VERS */
1740 TPV_QI0('1', 'C', 'F', '0'), /* R30 */
1741 TPV_QI0('1', 'F', 'F', '1'), /* R31 */
1742 TPV_QI0('1', 'M', '9', '7'), /* R32 */
1743 TPV_QI0('1', 'O', '6', '1'), /* R40 */
1744 TPV_QI0('1', 'P', '6', '5'), /* R40 */
1745 TPV_QI0('1', 'S', '7', '0'), /* R40e */
1746 TPV_QI1('1', 'R', 'D', 'R', '7', '1'), /* R50/p, R51,
1747 T40/p, T41/p, T42/p (1) */
1748 TPV_QI1('1', 'V', '7', '1', '2', '8'), /* R50e, R51 (1) */
1749 TPV_QI1('7', '8', '7', '1', '0', '6'), /* R51e (1) */
1750 TPV_QI1('7', '6', '6', '9', '1', '6'), /* R52 (1) */
1751 TPV_QI1('7', '0', '6', '9', '2', '8'), /* R52, T43 (1) */
1752
1753 TPV_QI0('I', 'Y', '6', '1'), /* T20 */
1754 TPV_QI0('K', 'Z', '3', '4'), /* T21 */
1755 TPV_QI0('1', '6', '3', '2'), /* T22 */
1756 TPV_QI1('1', 'A', '6', '4', '2', '3'), /* T23 (0) */
1757 TPV_QI1('1', 'I', '7', '1', '2', '0'), /* T30 (0) */
1758 TPV_QI1('1', 'Y', '6', '5', '2', '9'), /* T43/p (1) */
1759
1760 TPV_QL1('7', '9', 'E', '3', '5', '0'), /* T60/p */
1761 TPV_QL1('7', 'C', 'D', '2', '2', '2'), /* R60, R60i */
1762 TPV_QL1('7', 'E', 'D', '0', '1', '5'), /* R60e, R60i */
1763
1764 /* BIOS FW BIOS VERS EC FW EC VERS */
1765 TPV_QI2('1', 'W', '9', '0', '1', 'V', '2', '8'), /* R50e (1) */
1766 TPV_QL2('7', 'I', '3', '4', '7', '9', '5', '0'), /* T60/p wide */
1767
1768 /* X-series ------------------------- */
1769 /* FW MODEL BIOS VERS EC VERS */
1770 TPV_QI0('I', 'Z', '9', 'D'), /* X20, X21 */
1771 TPV_QI0('1', 'D', '7', '0'), /* X22, X23, X24 */
1772 TPV_QI1('1', 'K', '4', '8', '1', '8'), /* X30 (0) */
1773 TPV_QI1('1', 'Q', '9', '7', '2', '3'), /* X31, X32 (0) */
1774 TPV_QI1('1', 'U', 'D', '3', 'B', '2'), /* X40 (0) */
1775 TPV_QI1('7', '4', '6', '4', '2', '7'), /* X41 (0) */
1776 TPV_QI1('7', '5', '6', '0', '2', '0'), /* X41t (0) */
1777
1778 TPV_QL1('7', 'B', 'D', '7', '4', '0'), /* X60/s */
1779 TPV_QL1('7', 'J', '3', '0', '1', '3'), /* X60t */
1780
1781 /* (0) - older versions lack DMI EC fw string and functionality */
1782 /* (1) - older versions known to lack functionality */
1783 };
1784
1785 #undef TPV_QL1
1786 #undef TPV_QL0
1787 #undef TPV_QI2
1788 #undef TPV_QI1
1789 #undef TPV_QI0
1790 #undef TPV_Q_X
1791 #undef TPV_Q
1792
1793 static void __init tpacpi_check_outdated_fw(void)
1794 {
1795 unsigned long fwvers;
1796 u16 ec_version, bios_version;
1797
1798 fwvers = tpacpi_check_quirks(tpacpi_bios_version_qtable,
1799 ARRAY_SIZE(tpacpi_bios_version_qtable));
1800
1801 if (!fwvers)
1802 return;
1803
1804 bios_version = fwvers & 0xffffU;
1805 ec_version = (fwvers >> 16) & 0xffffU;
1806
1807 /* note that unknown versions are set to 0x0000 and we use that */
1808 if ((bios_version > thinkpad_id.bios_release) ||
1809 (ec_version > thinkpad_id.ec_release &&
1810 ec_version != TPACPI_MATCH_ANY)) {
1811 /*
1812 * The changelogs would let us track down the exact
1813 * reason, but it is just too much of a pain to track
1814 * it. We only list BIOSes that are either really
1815 * broken, or really stable to begin with, so it is
1816 * best if the user upgrades the firmware anyway.
1817 */
1818 pr_warn("WARNING: Outdated ThinkPad BIOS/EC firmware\n");
1819 pr_warn("WARNING: This firmware may be missing critical bug "
1820 "fixes and/or important features\n");
1821 }
1822 }
1823
1824 static bool __init tpacpi_is_fw_known(void)
1825 {
1826 return tpacpi_check_quirks(tpacpi_bios_version_qtable,
1827 ARRAY_SIZE(tpacpi_bios_version_qtable)) != 0;
1828 }
1829
1830 /****************************************************************************
1831 ****************************************************************************
1832 *
1833 * Subdrivers
1834 *
1835 ****************************************************************************
1836 ****************************************************************************/
1837
1838 /*************************************************************************
1839 * thinkpad-acpi metadata subdriver
1840 */
1841
1842 static int thinkpad_acpi_driver_read(struct seq_file *m)
1843 {
1844 seq_printf(m, "driver:\t\t%s\n", TPACPI_DESC);
1845 seq_printf(m, "version:\t%s\n", TPACPI_VERSION);
1846 return 0;
1847 }
1848
1849 static struct ibm_struct thinkpad_acpi_driver_data = {
1850 .name = "driver",
1851 .read = thinkpad_acpi_driver_read,
1852 };
1853
1854 /*************************************************************************
1855 * Hotkey subdriver
1856 */
1857
1858 /*
1859 * ThinkPad firmware event model
1860 *
1861 * The ThinkPad firmware has two main event interfaces: normal ACPI
1862 * notifications (which follow the ACPI standard), and a private event
1863 * interface.
1864 *
1865 * The private event interface also issues events for the hotkeys. As
1866 * the driver gained features, the event handling code ended up being
1867 * built around the hotkey subdriver. This will need to be refactored
1868 * to a more formal event API eventually.
1869 *
1870 * Some "hotkeys" are actually supposed to be used as event reports,
1871 * such as "brightness has changed", "volume has changed", depending on
1872 * the ThinkPad model and how the firmware is operating.
1873 *
1874 * Unlike other classes, hotkey-class events have mask/unmask control on
1875 * non-ancient firmware. However, how it behaves changes a lot with the
1876 * firmware model and version.
1877 */
1878
1879 enum { /* hot key scan codes (derived from ACPI DSDT) */
1880 TP_ACPI_HOTKEYSCAN_FNF1 = 0,
1881 TP_ACPI_HOTKEYSCAN_FNF2,
1882 TP_ACPI_HOTKEYSCAN_FNF3,
1883 TP_ACPI_HOTKEYSCAN_FNF4,
1884 TP_ACPI_HOTKEYSCAN_FNF5,
1885 TP_ACPI_HOTKEYSCAN_FNF6,
1886 TP_ACPI_HOTKEYSCAN_FNF7,
1887 TP_ACPI_HOTKEYSCAN_FNF8,
1888 TP_ACPI_HOTKEYSCAN_FNF9,
1889 TP_ACPI_HOTKEYSCAN_FNF10,
1890 TP_ACPI_HOTKEYSCAN_FNF11,
1891 TP_ACPI_HOTKEYSCAN_FNF12,
1892 TP_ACPI_HOTKEYSCAN_FNBACKSPACE,
1893 TP_ACPI_HOTKEYSCAN_FNINSERT,
1894 TP_ACPI_HOTKEYSCAN_FNDELETE,
1895 TP_ACPI_HOTKEYSCAN_FNHOME,
1896 TP_ACPI_HOTKEYSCAN_FNEND,
1897 TP_ACPI_HOTKEYSCAN_FNPAGEUP,
1898 TP_ACPI_HOTKEYSCAN_FNPAGEDOWN,
1899 TP_ACPI_HOTKEYSCAN_FNSPACE,
1900 TP_ACPI_HOTKEYSCAN_VOLUMEUP,
1901 TP_ACPI_HOTKEYSCAN_VOLUMEDOWN,
1902 TP_ACPI_HOTKEYSCAN_MUTE,
1903 TP_ACPI_HOTKEYSCAN_THINKPAD,
1904 TP_ACPI_HOTKEYSCAN_UNK1,
1905 TP_ACPI_HOTKEYSCAN_UNK2,
1906 TP_ACPI_HOTKEYSCAN_UNK3,
1907 TP_ACPI_HOTKEYSCAN_UNK4,
1908 TP_ACPI_HOTKEYSCAN_UNK5,
1909 TP_ACPI_HOTKEYSCAN_UNK6,
1910 TP_ACPI_HOTKEYSCAN_UNK7,
1911 TP_ACPI_HOTKEYSCAN_UNK8,
1912
1913 /* Hotkey keymap size */
1914 TPACPI_HOTKEY_MAP_LEN
1915 };
1916
1917 enum { /* Keys/events available through NVRAM polling */
1918 TPACPI_HKEY_NVRAM_KNOWN_MASK = 0x00fb88c0U,
1919 TPACPI_HKEY_NVRAM_GOOD_MASK = 0x00fb8000U,
1920 };
1921
1922 enum { /* Positions of some of the keys in hotkey masks */
1923 TP_ACPI_HKEY_DISPSWTCH_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF7,
1924 TP_ACPI_HKEY_DISPXPAND_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF8,
1925 TP_ACPI_HKEY_HIBERNATE_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF12,
1926 TP_ACPI_HKEY_BRGHTUP_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNHOME,
1927 TP_ACPI_HKEY_BRGHTDWN_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNEND,
1928 TP_ACPI_HKEY_THNKLGHT_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNPAGEUP,
1929 TP_ACPI_HKEY_ZOOM_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNSPACE,
1930 TP_ACPI_HKEY_VOLUP_MASK = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEUP,
1931 TP_ACPI_HKEY_VOLDWN_MASK = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEDOWN,
1932 TP_ACPI_HKEY_MUTE_MASK = 1 << TP_ACPI_HOTKEYSCAN_MUTE,
1933 TP_ACPI_HKEY_THINKPAD_MASK = 1 << TP_ACPI_HOTKEYSCAN_THINKPAD,
1934 };
1935
1936 enum { /* NVRAM to ACPI HKEY group map */
1937 TP_NVRAM_HKEY_GROUP_HK2 = TP_ACPI_HKEY_THINKPAD_MASK |
1938 TP_ACPI_HKEY_ZOOM_MASK |
1939 TP_ACPI_HKEY_DISPSWTCH_MASK |
1940 TP_ACPI_HKEY_HIBERNATE_MASK,
1941 TP_NVRAM_HKEY_GROUP_BRIGHTNESS = TP_ACPI_HKEY_BRGHTUP_MASK |
1942 TP_ACPI_HKEY_BRGHTDWN_MASK,
1943 TP_NVRAM_HKEY_GROUP_VOLUME = TP_ACPI_HKEY_VOLUP_MASK |
1944 TP_ACPI_HKEY_VOLDWN_MASK |
1945 TP_ACPI_HKEY_MUTE_MASK,
1946 };
1947
1948 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1949 struct tp_nvram_state {
1950 u16 thinkpad_toggle:1;
1951 u16 zoom_toggle:1;
1952 u16 display_toggle:1;
1953 u16 thinklight_toggle:1;
1954 u16 hibernate_toggle:1;
1955 u16 displayexp_toggle:1;
1956 u16 display_state:1;
1957 u16 brightness_toggle:1;
1958 u16 volume_toggle:1;
1959 u16 mute:1;
1960
1961 u8 brightness_level;
1962 u8 volume_level;
1963 };
1964
1965 /* kthread for the hotkey poller */
1966 static struct task_struct *tpacpi_hotkey_task;
1967
1968 /* Acquired while the poller kthread is running, use to sync start/stop */
1969 static struct mutex hotkey_thread_mutex;
1970
1971 /*
1972 * Acquire mutex to write poller control variables as an
1973 * atomic block.
1974 *
1975 * Increment hotkey_config_change when changing them if you
1976 * want the kthread to forget old state.
1977 *
1978 * See HOTKEY_CONFIG_CRITICAL_START/HOTKEY_CONFIG_CRITICAL_END
1979 */
1980 static struct mutex hotkey_thread_data_mutex;
1981 static unsigned int hotkey_config_change;
1982
1983 /*
1984 * hotkey poller control variables
1985 *
1986 * Must be atomic or readers will also need to acquire mutex
1987 *
1988 * HOTKEY_CONFIG_CRITICAL_START/HOTKEY_CONFIG_CRITICAL_END
1989 * should be used only when the changes need to be taken as
1990 * a block, OR when one needs to force the kthread to forget
1991 * old state.
1992 */
1993 static u32 hotkey_source_mask; /* bit mask 0=ACPI,1=NVRAM */
1994 static unsigned int hotkey_poll_freq = 10; /* Hz */
1995
1996 #define HOTKEY_CONFIG_CRITICAL_START \
1997 do { \
1998 mutex_lock(&hotkey_thread_data_mutex); \
1999 hotkey_config_change++; \
2000 } while (0);
2001 #define HOTKEY_CONFIG_CRITICAL_END \
2002 mutex_unlock(&hotkey_thread_data_mutex);
2003
2004 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2005
2006 #define hotkey_source_mask 0U
2007 #define HOTKEY_CONFIG_CRITICAL_START
2008 #define HOTKEY_CONFIG_CRITICAL_END
2009
2010 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2011
2012 static struct mutex hotkey_mutex;
2013
2014 static enum { /* Reasons for waking up */
2015 TP_ACPI_WAKEUP_NONE = 0, /* None or unknown */
2016 TP_ACPI_WAKEUP_BAYEJ, /* Bay ejection request */
2017 TP_ACPI_WAKEUP_UNDOCK, /* Undock request */
2018 } hotkey_wakeup_reason;
2019
2020 static int hotkey_autosleep_ack;
2021
2022 static u32 hotkey_orig_mask; /* events the BIOS had enabled */
2023 static u32 hotkey_all_mask; /* all events supported in fw */
2024 static u32 hotkey_reserved_mask; /* events better left disabled */
2025 static u32 hotkey_driver_mask; /* events needed by the driver */
2026 static u32 hotkey_user_mask; /* events visible to userspace */
2027 static u32 hotkey_acpi_mask; /* events enabled in firmware */
2028
2029 static unsigned int hotkey_report_mode;
2030
2031 static u16 *hotkey_keycode_map;
2032
2033 static struct attribute_set *hotkey_dev_attributes;
2034
2035 static void tpacpi_driver_event(const unsigned int hkey_event);
2036 static void hotkey_driver_event(const unsigned int scancode);
2037 static void hotkey_poll_setup(const bool may_warn);
2038
2039 /* HKEY.MHKG() return bits */
2040 #define TP_HOTKEY_TABLET_MASK (1 << 3)
2041
2042 static int hotkey_get_wlsw(void)
2043 {
2044 int status;
2045
2046 if (!tp_features.hotkey_wlsw)
2047 return -ENODEV;
2048
2049 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
2050 if (dbg_wlswemul)
2051 return (tpacpi_wlsw_emulstate) ?
2052 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
2053 #endif
2054
2055 if (!acpi_evalf(hkey_handle, &status, "WLSW", "d"))
2056 return -EIO;
2057
2058 return (status) ? TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
2059 }
2060
2061 static int hotkey_get_tablet_mode(int *status)
2062 {
2063 int s;
2064
2065 if (!acpi_evalf(hkey_handle, &s, "MHKG", "d"))
2066 return -EIO;
2067
2068 *status = ((s & TP_HOTKEY_TABLET_MASK) != 0);
2069 return 0;
2070 }
2071
2072 /*
2073 * Reads current event mask from firmware, and updates
2074 * hotkey_acpi_mask accordingly. Also resets any bits
2075 * from hotkey_user_mask that are unavailable to be
2076 * delivered (shadow requirement of the userspace ABI).
2077 *
2078 * Call with hotkey_mutex held
2079 */
2080 static int hotkey_mask_get(void)
2081 {
2082 if (tp_features.hotkey_mask) {
2083 u32 m = 0;
2084
2085 if (!acpi_evalf(hkey_handle, &m, "DHKN", "d"))
2086 return -EIO;
2087
2088 hotkey_acpi_mask = m;
2089 } else {
2090 /* no mask support doesn't mean no event support... */
2091 hotkey_acpi_mask = hotkey_all_mask;
2092 }
2093
2094 /* sync userspace-visible mask */
2095 hotkey_user_mask &= (hotkey_acpi_mask | hotkey_source_mask);
2096
2097 return 0;
2098 }
2099
2100 void static hotkey_mask_warn_incomplete_mask(void)
2101 {
2102 /* log only what the user can fix... */
2103 const u32 wantedmask = hotkey_driver_mask &
2104 ~(hotkey_acpi_mask | hotkey_source_mask) &
2105 (hotkey_all_mask | TPACPI_HKEY_NVRAM_KNOWN_MASK);
2106
2107 if (wantedmask)
2108 pr_notice("required events 0x%08x not enabled!\n", wantedmask);
2109 }
2110
2111 /*
2112 * Set the firmware mask when supported
2113 *
2114 * Also calls hotkey_mask_get to update hotkey_acpi_mask.
2115 *
2116 * NOTE: does not set bits in hotkey_user_mask, but may reset them.
2117 *
2118 * Call with hotkey_mutex held
2119 */
2120 static int hotkey_mask_set(u32 mask)
2121 {
2122 int i;
2123 int rc = 0;
2124
2125 const u32 fwmask = mask & ~hotkey_source_mask;
2126
2127 if (tp_features.hotkey_mask) {
2128 for (i = 0; i < 32; i++) {
2129 if (!acpi_evalf(hkey_handle,
2130 NULL, "MHKM", "vdd", i + 1,
2131 !!(mask & (1 << i)))) {
2132 rc = -EIO;
2133 break;
2134 }
2135 }
2136 }
2137
2138 /*
2139 * We *must* make an inconditional call to hotkey_mask_get to
2140 * refresh hotkey_acpi_mask and update hotkey_user_mask
2141 *
2142 * Take the opportunity to also log when we cannot _enable_
2143 * a given event.
2144 */
2145 if (!hotkey_mask_get() && !rc && (fwmask & ~hotkey_acpi_mask)) {
2146 pr_notice("asked for hotkey mask 0x%08x, but "
2147 "firmware forced it to 0x%08x\n",
2148 fwmask, hotkey_acpi_mask);
2149 }
2150
2151 if (tpacpi_lifecycle != TPACPI_LIFE_EXITING)
2152 hotkey_mask_warn_incomplete_mask();
2153
2154 return rc;
2155 }
2156
2157 /*
2158 * Sets hotkey_user_mask and tries to set the firmware mask
2159 *
2160 * Call with hotkey_mutex held
2161 */
2162 static int hotkey_user_mask_set(const u32 mask)
2163 {
2164 int rc;
2165
2166 /* Give people a chance to notice they are doing something that
2167 * is bound to go boom on their users sooner or later */
2168 if (!tp_warned.hotkey_mask_ff &&
2169 (mask == 0xffff || mask == 0xffffff ||
2170 mask == 0xffffffff)) {
2171 tp_warned.hotkey_mask_ff = 1;
2172 pr_notice("setting the hotkey mask to 0x%08x is likely "
2173 "not the best way to go about it\n", mask);
2174 pr_notice("please consider using the driver defaults, "
2175 "and refer to up-to-date thinkpad-acpi "
2176 "documentation\n");
2177 }
2178
2179 /* Try to enable what the user asked for, plus whatever we need.
2180 * this syncs everything but won't enable bits in hotkey_user_mask */
2181 rc = hotkey_mask_set((mask | hotkey_driver_mask) & ~hotkey_source_mask);
2182
2183 /* Enable the available bits in hotkey_user_mask */
2184 hotkey_user_mask = mask & (hotkey_acpi_mask | hotkey_source_mask);
2185
2186 return rc;
2187 }
2188
2189 /*
2190 * Sets the driver hotkey mask.
2191 *
2192 * Can be called even if the hotkey subdriver is inactive
2193 */
2194 static int tpacpi_hotkey_driver_mask_set(const u32 mask)
2195 {
2196 int rc;
2197
2198 /* Do the right thing if hotkey_init has not been called yet */
2199 if (!tp_features.hotkey) {
2200 hotkey_driver_mask = mask;
2201 return 0;
2202 }
2203
2204 mutex_lock(&hotkey_mutex);
2205
2206 HOTKEY_CONFIG_CRITICAL_START
2207 hotkey_driver_mask = mask;
2208 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2209 hotkey_source_mask |= (mask & ~hotkey_all_mask);
2210 #endif
2211 HOTKEY_CONFIG_CRITICAL_END
2212
2213 rc = hotkey_mask_set((hotkey_acpi_mask | hotkey_driver_mask) &
2214 ~hotkey_source_mask);
2215 hotkey_poll_setup(true);
2216
2217 mutex_unlock(&hotkey_mutex);
2218
2219 return rc;
2220 }
2221
2222 static int hotkey_status_get(int *status)
2223 {
2224 if (!acpi_evalf(hkey_handle, status, "DHKC", "d"))
2225 return -EIO;
2226
2227 return 0;
2228 }
2229
2230 static int hotkey_status_set(bool enable)
2231 {
2232 if (!acpi_evalf(hkey_handle, NULL, "MHKC", "vd", enable ? 1 : 0))
2233 return -EIO;
2234
2235 return 0;
2236 }
2237
2238 static void tpacpi_input_send_tabletsw(void)
2239 {
2240 int state;
2241
2242 if (tp_features.hotkey_tablet &&
2243 !hotkey_get_tablet_mode(&state)) {
2244 mutex_lock(&tpacpi_inputdev_send_mutex);
2245
2246 input_report_switch(tpacpi_inputdev,
2247 SW_TABLET_MODE, !!state);
2248 input_sync(tpacpi_inputdev);
2249
2250 mutex_unlock(&tpacpi_inputdev_send_mutex);
2251 }
2252 }
2253
2254 /* Do NOT call without validating scancode first */
2255 static void tpacpi_input_send_key(const unsigned int scancode)
2256 {
2257 const unsigned int keycode = hotkey_keycode_map[scancode];
2258
2259 if (keycode != KEY_RESERVED) {
2260 mutex_lock(&tpacpi_inputdev_send_mutex);
2261
2262 input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN, scancode);
2263 input_report_key(tpacpi_inputdev, keycode, 1);
2264 input_sync(tpacpi_inputdev);
2265
2266 input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN, scancode);
2267 input_report_key(tpacpi_inputdev, keycode, 0);
2268 input_sync(tpacpi_inputdev);
2269
2270 mutex_unlock(&tpacpi_inputdev_send_mutex);
2271 }
2272 }
2273
2274 /* Do NOT call without validating scancode first */
2275 static void tpacpi_input_send_key_masked(const unsigned int scancode)
2276 {
2277 hotkey_driver_event(scancode);
2278 if (hotkey_user_mask & (1 << scancode))
2279 tpacpi_input_send_key(scancode);
2280 }
2281
2282 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2283 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver;
2284
2285 /* Do NOT call without validating scancode first */
2286 static void tpacpi_hotkey_send_key(unsigned int scancode)
2287 {
2288 tpacpi_input_send_key_masked(scancode);
2289 if (hotkey_report_mode < 2) {
2290 acpi_bus_generate_proc_event(ibm_hotkey_acpidriver.device,
2291 0x80, TP_HKEY_EV_HOTKEY_BASE + scancode);
2292 }
2293 }
2294
2295 static void hotkey_read_nvram(struct tp_nvram_state *n, const u32 m)
2296 {
2297 u8 d;
2298
2299 if (m & TP_NVRAM_HKEY_GROUP_HK2) {
2300 d = nvram_read_byte(TP_NVRAM_ADDR_HK2);
2301 n->thinkpad_toggle = !!(d & TP_NVRAM_MASK_HKT_THINKPAD);
2302 n->zoom_toggle = !!(d & TP_NVRAM_MASK_HKT_ZOOM);
2303 n->display_toggle = !!(d & TP_NVRAM_MASK_HKT_DISPLAY);
2304 n->hibernate_toggle = !!(d & TP_NVRAM_MASK_HKT_HIBERNATE);
2305 }
2306 if (m & TP_ACPI_HKEY_THNKLGHT_MASK) {
2307 d = nvram_read_byte(TP_NVRAM_ADDR_THINKLIGHT);
2308 n->thinklight_toggle = !!(d & TP_NVRAM_MASK_THINKLIGHT);
2309 }
2310 if (m & TP_ACPI_HKEY_DISPXPAND_MASK) {
2311 d = nvram_read_byte(TP_NVRAM_ADDR_VIDEO);
2312 n->displayexp_toggle =
2313 !!(d & TP_NVRAM_MASK_HKT_DISPEXPND);
2314 }
2315 if (m & TP_NVRAM_HKEY_GROUP_BRIGHTNESS) {
2316 d = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS);
2317 n->brightness_level = (d & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
2318 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
2319 n->brightness_toggle =
2320 !!(d & TP_NVRAM_MASK_HKT_BRIGHTNESS);
2321 }
2322 if (m & TP_NVRAM_HKEY_GROUP_VOLUME) {
2323 d = nvram_read_byte(TP_NVRAM_ADDR_MIXER);
2324 n->volume_level = (d & TP_NVRAM_MASK_LEVEL_VOLUME)
2325 >> TP_NVRAM_POS_LEVEL_VOLUME;
2326 n->mute = !!(d & TP_NVRAM_MASK_MUTE);
2327 n->volume_toggle = !!(d & TP_NVRAM_MASK_HKT_VOLUME);
2328 }
2329 }
2330
2331 static void hotkey_compare_and_issue_event(struct tp_nvram_state *oldn,
2332 struct tp_nvram_state *newn,
2333 const u32 event_mask)
2334 {
2335
2336 #define TPACPI_COMPARE_KEY(__scancode, __member) \
2337 do { \
2338 if ((event_mask & (1 << __scancode)) && \
2339 oldn->__member != newn->__member) \
2340 tpacpi_hotkey_send_key(__scancode); \
2341 } while (0)
2342
2343 #define TPACPI_MAY_SEND_KEY(__scancode) \
2344 do { \
2345 if (event_mask & (1 << __scancode)) \
2346 tpacpi_hotkey_send_key(__scancode); \
2347 } while (0)
2348
2349 void issue_volchange(const unsigned int oldvol,
2350 const unsigned int newvol)
2351 {
2352 unsigned int i = oldvol;
2353
2354 while (i > newvol) {
2355 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
2356 i--;
2357 }
2358 while (i < newvol) {
2359 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
2360 i++;
2361 }
2362 }
2363
2364 void issue_brightnesschange(const unsigned int oldbrt,
2365 const unsigned int newbrt)
2366 {
2367 unsigned int i = oldbrt;
2368
2369 while (i > newbrt) {
2370 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
2371 i--;
2372 }
2373 while (i < newbrt) {
2374 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
2375 i++;
2376 }
2377 }
2378
2379 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_THINKPAD, thinkpad_toggle);
2380 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNSPACE, zoom_toggle);
2381 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF7, display_toggle);
2382 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF12, hibernate_toggle);
2383
2384 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNPAGEUP, thinklight_toggle);
2385
2386 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF8, displayexp_toggle);
2387
2388 /*
2389 * Handle volume
2390 *
2391 * This code is supposed to duplicate the IBM firmware behaviour:
2392 * - Pressing MUTE issues mute hotkey message, even when already mute
2393 * - Pressing Volume up/down issues volume up/down hotkey messages,
2394 * even when already at maximum or minimum volume
2395 * - The act of unmuting issues volume up/down notification,
2396 * depending which key was used to unmute
2397 *
2398 * We are constrained to what the NVRAM can tell us, which is not much
2399 * and certainly not enough if more than one volume hotkey was pressed
2400 * since the last poll cycle.
2401 *
2402 * Just to make our life interesting, some newer Lenovo ThinkPads have
2403 * bugs in the BIOS and may fail to update volume_toggle properly.
2404 */
2405 if (newn->mute) {
2406 /* muted */
2407 if (!oldn->mute ||
2408 oldn->volume_toggle != newn->volume_toggle ||
2409 oldn->volume_level != newn->volume_level) {
2410 /* recently muted, or repeated mute keypress, or
2411 * multiple presses ending in mute */
2412 issue_volchange(oldn->volume_level, newn->volume_level);
2413 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE);
2414 }
2415 } else {
2416 /* unmute */
2417 if (oldn->mute) {
2418 /* recently unmuted, issue 'unmute' keypress */
2419 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
2420 }
2421 if (oldn->volume_level != newn->volume_level) {
2422 issue_volchange(oldn->volume_level, newn->volume_level);
2423 } else if (oldn->volume_toggle != newn->volume_toggle) {
2424 /* repeated vol up/down keypress at end of scale ? */
2425 if (newn->volume_level == 0)
2426 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
2427 else if (newn->volume_level >= TP_NVRAM_LEVEL_VOLUME_MAX)
2428 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
2429 }
2430 }
2431
2432 /* handle brightness */
2433 if (oldn->brightness_level != newn->brightness_level) {
2434 issue_brightnesschange(oldn->brightness_level,
2435 newn->brightness_level);
2436 } else if (oldn->brightness_toggle != newn->brightness_toggle) {
2437 /* repeated key presses that didn't change state */
2438 if (newn->brightness_level == 0)
2439 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
2440 else if (newn->brightness_level >= bright_maxlvl
2441 && !tp_features.bright_unkfw)
2442 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
2443 }
2444
2445 #undef TPACPI_COMPARE_KEY
2446 #undef TPACPI_MAY_SEND_KEY
2447 }
2448
2449 /*
2450 * Polling driver
2451 *
2452 * We track all events in hotkey_source_mask all the time, since
2453 * most of them are edge-based. We only issue those requested by
2454 * hotkey_user_mask or hotkey_driver_mask, though.
2455 */
2456 static int hotkey_kthread(void *data)
2457 {
2458 struct tp_nvram_state s[2];
2459 u32 poll_mask, event_mask;
2460 unsigned int si, so;
2461 unsigned long t;
2462 unsigned int change_detector;
2463 unsigned int poll_freq;
2464 bool was_frozen;
2465
2466 mutex_lock(&hotkey_thread_mutex);
2467
2468 if (tpacpi_lifecycle == TPACPI_LIFE_EXITING)
2469 goto exit;
2470
2471 set_freezable();
2472
2473 so = 0;
2474 si = 1;
2475 t = 0;
2476
2477 /* Initial state for compares */
2478 mutex_lock(&hotkey_thread_data_mutex);
2479 change_detector = hotkey_config_change;
2480 poll_mask = hotkey_source_mask;
2481 event_mask = hotkey_source_mask &
2482 (hotkey_driver_mask | hotkey_user_mask);
2483 poll_freq = hotkey_poll_freq;
2484 mutex_unlock(&hotkey_thread_data_mutex);
2485 hotkey_read_nvram(&s[so], poll_mask);
2486
2487 while (!kthread_should_stop()) {
2488 if (t == 0) {
2489 if (likely(poll_freq))
2490 t = 1000/poll_freq;
2491 else
2492 t = 100; /* should never happen... */
2493 }
2494 t = msleep_interruptible(t);
2495 if (unlikely(kthread_freezable_should_stop(&was_frozen)))
2496 break;
2497
2498 if (t > 0 && !was_frozen)
2499 continue;
2500
2501 mutex_lock(&hotkey_thread_data_mutex);
2502 if (was_frozen || hotkey_config_change != change_detector) {
2503 /* forget old state on thaw or config change */
2504 si = so;
2505 t = 0;
2506 change_detector = hotkey_config_change;
2507 }
2508 poll_mask = hotkey_source_mask;
2509 event_mask = hotkey_source_mask &
2510 (hotkey_driver_mask | hotkey_user_mask);
2511 poll_freq = hotkey_poll_freq;
2512 mutex_unlock(&hotkey_thread_data_mutex);
2513
2514 if (likely(poll_mask)) {
2515 hotkey_read_nvram(&s[si], poll_mask);
2516 if (likely(si != so)) {
2517 hotkey_compare_and_issue_event(&s[so], &s[si],
2518 event_mask);
2519 }
2520 }
2521
2522 so = si;
2523 si ^= 1;
2524 }
2525
2526 exit:
2527 mutex_unlock(&hotkey_thread_mutex);
2528 return 0;
2529 }
2530
2531 /* call with hotkey_mutex held */
2532 static void hotkey_poll_stop_sync(void)
2533 {
2534 if (tpacpi_hotkey_task) {
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 dbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_HKEY,
3021 "restoring original HKEY status and mask\n");
3022 /* yes, there is a bitwise or below, we want the
3023 * functions to be called even if one of them fail */
3024 if (((tp_features.hotkey_mask &&
3025 hotkey_mask_set(hotkey_orig_mask)) |
3026 hotkey_status_set(false)) != 0)
3027 pr_err("failed to restore hot key mask "
3028 "to BIOS defaults\n");
3029 }
3030
3031 static void __init hotkey_unmap(const unsigned int scancode)
3032 {
3033 if (hotkey_keycode_map[scancode] != KEY_RESERVED) {
3034 clear_bit(hotkey_keycode_map[scancode],
3035 tpacpi_inputdev->keybit);
3036 hotkey_keycode_map[scancode] = KEY_RESERVED;
3037 }
3038 }
3039
3040 /*
3041 * HKEY quirks:
3042 * TPACPI_HK_Q_INIMASK: Supports FN+F3,FN+F4,FN+F12
3043 */
3044
3045 #define TPACPI_HK_Q_INIMASK 0x0001
3046
3047 static const struct tpacpi_quirk tpacpi_hotkey_qtable[] __initconst = {
3048 TPACPI_Q_IBM('I', 'H', TPACPI_HK_Q_INIMASK), /* 600E */
3049 TPACPI_Q_IBM('I', 'N', TPACPI_HK_Q_INIMASK), /* 600E */
3050 TPACPI_Q_IBM('I', 'D', TPACPI_HK_Q_INIMASK), /* 770, 770E, 770ED */
3051 TPACPI_Q_IBM('I', 'W', TPACPI_HK_Q_INIMASK), /* A20m */
3052 TPACPI_Q_IBM('I', 'V', TPACPI_HK_Q_INIMASK), /* A20p */
3053 TPACPI_Q_IBM('1', '0', TPACPI_HK_Q_INIMASK), /* A21e, A22e */
3054 TPACPI_Q_IBM('K', 'U', TPACPI_HK_Q_INIMASK), /* A21e */
3055 TPACPI_Q_IBM('K', 'X', TPACPI_HK_Q_INIMASK), /* A21m, A22m */
3056 TPACPI_Q_IBM('K', 'Y', TPACPI_HK_Q_INIMASK), /* A21p, A22p */
3057 TPACPI_Q_IBM('1', 'B', TPACPI_HK_Q_INIMASK), /* A22e */
3058 TPACPI_Q_IBM('1', '3', TPACPI_HK_Q_INIMASK), /* A22m */
3059 TPACPI_Q_IBM('1', 'E', TPACPI_HK_Q_INIMASK), /* A30/p (0) */
3060 TPACPI_Q_IBM('1', 'C', TPACPI_HK_Q_INIMASK), /* R30 */
3061 TPACPI_Q_IBM('1', 'F', TPACPI_HK_Q_INIMASK), /* R31 */
3062 TPACPI_Q_IBM('I', 'Y', TPACPI_HK_Q_INIMASK), /* T20 */
3063 TPACPI_Q_IBM('K', 'Z', TPACPI_HK_Q_INIMASK), /* T21 */
3064 TPACPI_Q_IBM('1', '6', TPACPI_HK_Q_INIMASK), /* T22 */
3065 TPACPI_Q_IBM('I', 'Z', TPACPI_HK_Q_INIMASK), /* X20, X21 */
3066 TPACPI_Q_IBM('1', 'D', TPACPI_HK_Q_INIMASK), /* X22, X23, X24 */
3067 };
3068
3069 typedef u16 tpacpi_keymap_entry_t;
3070 typedef tpacpi_keymap_entry_t tpacpi_keymap_t[TPACPI_HOTKEY_MAP_LEN];
3071
3072 static int __init hotkey_init(struct ibm_init_struct *iibm)
3073 {
3074 /* Requirements for changing the default keymaps:
3075 *
3076 * 1. Many of the keys are mapped to KEY_RESERVED for very
3077 * good reasons. Do not change them unless you have deep
3078 * knowledge on the IBM and Lenovo ThinkPad firmware for
3079 * the various ThinkPad models. The driver behaves
3080 * differently for KEY_RESERVED: such keys have their
3081 * hot key mask *unset* in mask_recommended, and also
3082 * in the initial hot key mask programmed into the
3083 * firmware at driver load time, which means the firm-
3084 * ware may react very differently if you change them to
3085 * something else;
3086 *
3087 * 2. You must be subscribed to the linux-thinkpad and
3088 * ibm-acpi-devel mailing lists, and you should read the
3089 * list archives since 2007 if you want to change the
3090 * keymaps. This requirement exists so that you will
3091 * know the past history of problems with the thinkpad-
3092 * acpi driver keymaps, and also that you will be
3093 * listening to any bug reports;
3094 *
3095 * 3. Do not send thinkpad-acpi specific patches directly to
3096 * for merging, *ever*. Send them to the linux-acpi
3097 * mailinglist for comments. Merging is to be done only
3098 * through acpi-test and the ACPI maintainer.
3099 *
3100 * If the above is too much to ask, don't change the keymap.
3101 * Ask the thinkpad-acpi maintainer to do it, instead.
3102 */
3103
3104 enum keymap_index {
3105 TPACPI_KEYMAP_IBM_GENERIC = 0,
3106 TPACPI_KEYMAP_LENOVO_GENERIC,
3107 };
3108
3109 static const tpacpi_keymap_t tpacpi_keymaps[] __initconst = {
3110 /* Generic keymap for IBM ThinkPads */
3111 [TPACPI_KEYMAP_IBM_GENERIC] = {
3112 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
3113 KEY_FN_F1, KEY_BATTERY, KEY_COFFEE, KEY_SLEEP,
3114 KEY_WLAN, KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
3115 KEY_FN_F9, KEY_FN_F10, KEY_FN_F11, KEY_SUSPEND,
3116
3117 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
3118 KEY_UNKNOWN, /* 0x0C: FN+BACKSPACE */
3119 KEY_UNKNOWN, /* 0x0D: FN+INSERT */
3120 KEY_UNKNOWN, /* 0x0E: FN+DELETE */
3121
3122 /* brightness: firmware always reacts to them */
3123 KEY_RESERVED, /* 0x0F: FN+HOME (brightness up) */
3124 KEY_RESERVED, /* 0x10: FN+END (brightness down) */
3125
3126 /* Thinklight: firmware always react to it */
3127 KEY_RESERVED, /* 0x11: FN+PGUP (thinklight toggle) */
3128
3129 KEY_UNKNOWN, /* 0x12: FN+PGDOWN */
3130 KEY_ZOOM, /* 0x13: FN+SPACE (zoom) */
3131
3132 /* Volume: firmware always react to it and reprograms
3133 * the built-in *extra* mixer. Never map it to control
3134 * another mixer by default. */
3135 KEY_RESERVED, /* 0x14: VOLUME UP */
3136 KEY_RESERVED, /* 0x15: VOLUME DOWN */
3137 KEY_RESERVED, /* 0x16: MUTE */
3138
3139 KEY_VENDOR, /* 0x17: Thinkpad/AccessIBM/Lenovo */
3140
3141 /* (assignments unknown, please report if found) */
3142 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3143 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3144 },
3145
3146 /* Generic keymap for Lenovo ThinkPads */
3147 [TPACPI_KEYMAP_LENOVO_GENERIC] = {
3148 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
3149 KEY_FN_F1, KEY_COFFEE, KEY_BATTERY, KEY_SLEEP,
3150 KEY_WLAN, KEY_CAMERA, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
3151 KEY_FN_F9, KEY_FN_F10, KEY_FN_F11, KEY_SUSPEND,
3152
3153 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
3154 KEY_UNKNOWN, /* 0x0C: FN+BACKSPACE */
3155 KEY_UNKNOWN, /* 0x0D: FN+INSERT */
3156 KEY_UNKNOWN, /* 0x0E: FN+DELETE */
3157
3158 /* These should be enabled --only-- when ACPI video
3159 * is disabled (i.e. in "vendor" mode), and are handled
3160 * in a special way by the init code */
3161 KEY_BRIGHTNESSUP, /* 0x0F: FN+HOME (brightness up) */
3162 KEY_BRIGHTNESSDOWN, /* 0x10: FN+END (brightness down) */
3163
3164 KEY_RESERVED, /* 0x11: FN+PGUP (thinklight toggle) */
3165
3166 KEY_UNKNOWN, /* 0x12: FN+PGDOWN */
3167 KEY_ZOOM, /* 0x13: FN+SPACE (zoom) */
3168
3169 /* Volume: z60/z61, T60 (BIOS version?): firmware always
3170 * react to it and reprograms the built-in *extra* mixer.
3171 * Never map it to control another mixer by default.
3172 *
3173 * T60?, T61, R60?, R61: firmware and EC tries to send
3174 * these over the regular keyboard, so these are no-ops,
3175 * but there are still weird bugs re. MUTE, so do not
3176 * change unless you get test reports from all Lenovo
3177 * models. May cause the BIOS to interfere with the
3178 * HDA mixer.
3179 */
3180 KEY_RESERVED, /* 0x14: VOLUME UP */
3181 KEY_RESERVED, /* 0x15: VOLUME DOWN */
3182 KEY_RESERVED, /* 0x16: MUTE */
3183
3184 KEY_VENDOR, /* 0x17: Thinkpad/AccessIBM/Lenovo */
3185
3186 /* (assignments unknown, please report if found) */
3187 KEY_UNKNOWN, KEY_UNKNOWN,
3188
3189 /*
3190 * The mic mute button only sends 0x1a. It does not
3191 * automatically mute the mic or change the mute light.
3192 */
3193 KEY_MICMUTE, /* 0x1a: Mic mute (since ?400 or so) */
3194
3195 /* (assignments unknown, please report if found) */
3196 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3197 KEY_UNKNOWN,
3198 },
3199 };
3200
3201 static const struct tpacpi_quirk tpacpi_keymap_qtable[] __initconst = {
3202 /* Generic maps (fallback) */
3203 {
3204 .vendor = PCI_VENDOR_ID_IBM,
3205 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY,
3206 .quirks = TPACPI_KEYMAP_IBM_GENERIC,
3207 },
3208 {
3209 .vendor = PCI_VENDOR_ID_LENOVO,
3210 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY,
3211 .quirks = TPACPI_KEYMAP_LENOVO_GENERIC,
3212 },
3213 };
3214
3215 #define TPACPI_HOTKEY_MAP_SIZE sizeof(tpacpi_keymap_t)
3216 #define TPACPI_HOTKEY_MAP_TYPESIZE sizeof(tpacpi_keymap_entry_t)
3217
3218 int res, i;
3219 int status;
3220 int hkeyv;
3221 bool radiosw_state = false;
3222 bool tabletsw_state = false;
3223
3224 unsigned long quirks;
3225 unsigned long keymap_id;
3226
3227 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3228 "initializing hotkey subdriver\n");
3229
3230 BUG_ON(!tpacpi_inputdev);
3231 BUG_ON(tpacpi_inputdev->open != NULL ||
3232 tpacpi_inputdev->close != NULL);
3233
3234 TPACPI_ACPIHANDLE_INIT(hkey);
3235 mutex_init(&hotkey_mutex);
3236
3237 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
3238 mutex_init(&hotkey_thread_mutex);
3239 mutex_init(&hotkey_thread_data_mutex);
3240 #endif
3241
3242 /* hotkey not supported on 570 */
3243 tp_features.hotkey = hkey_handle != NULL;
3244
3245 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3246 "hotkeys are %s\n",
3247 str_supported(tp_features.hotkey));
3248
3249 if (!tp_features.hotkey)
3250 return 1;
3251
3252 quirks = tpacpi_check_quirks(tpacpi_hotkey_qtable,
3253 ARRAY_SIZE(tpacpi_hotkey_qtable));
3254
3255 tpacpi_disable_brightness_delay();
3256
3257 /* MUST have enough space for all attributes to be added to
3258 * hotkey_dev_attributes */
3259 hotkey_dev_attributes = create_attr_set(
3260 ARRAY_SIZE(hotkey_attributes) + 2,
3261 NULL);
3262 if (!hotkey_dev_attributes)
3263 return -ENOMEM;
3264 res = add_many_to_attr_set(hotkey_dev_attributes,
3265 hotkey_attributes,
3266 ARRAY_SIZE(hotkey_attributes));
3267 if (res)
3268 goto err_exit;
3269
3270 /* mask not supported on 600e/x, 770e, 770x, A21e, A2xm/p,
3271 A30, R30, R31, T20-22, X20-21, X22-24. Detected by checking
3272 for HKEY interface version 0x100 */
3273 if (acpi_evalf(hkey_handle, &hkeyv, "MHKV", "qd")) {
3274 if ((hkeyv >> 8) != 1) {
3275 pr_err("unknown version of the HKEY interface: 0x%x\n",
3276 hkeyv);
3277 pr_err("please report this to %s\n", TPACPI_MAIL);
3278 } else {
3279 /*
3280 * MHKV 0x100 in A31, R40, R40e,
3281 * T4x, X31, and later
3282 */
3283 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3284 "firmware HKEY interface version: 0x%x\n",
3285 hkeyv);
3286
3287 /* Paranoia check AND init hotkey_all_mask */
3288 if (!acpi_evalf(hkey_handle, &hotkey_all_mask,
3289 "MHKA", "qd")) {
3290 pr_err("missing MHKA handler, "
3291 "please report this to %s\n",
3292 TPACPI_MAIL);
3293 /* Fallback: pre-init for FN+F3,F4,F12 */
3294 hotkey_all_mask = 0x080cU;
3295 } else {
3296 tp_features.hotkey_mask = 1;
3297 }
3298 }
3299 }
3300
3301 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3302 "hotkey masks are %s\n",
3303 str_supported(tp_features.hotkey_mask));
3304
3305 /* Init hotkey_all_mask if not initialized yet */
3306 if (!tp_features.hotkey_mask && !hotkey_all_mask &&
3307 (quirks & TPACPI_HK_Q_INIMASK))
3308 hotkey_all_mask = 0x080cU; /* FN+F12, FN+F4, FN+F3 */
3309
3310 /* Init hotkey_acpi_mask and hotkey_orig_mask */
3311 if (tp_features.hotkey_mask) {
3312 /* hotkey_source_mask *must* be zero for
3313 * the first hotkey_mask_get to return hotkey_orig_mask */
3314 res = hotkey_mask_get();
3315 if (res)
3316 goto err_exit;
3317
3318 hotkey_orig_mask = hotkey_acpi_mask;
3319 } else {
3320 hotkey_orig_mask = hotkey_all_mask;
3321 hotkey_acpi_mask = hotkey_all_mask;
3322 }
3323
3324 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3325 if (dbg_wlswemul) {
3326 tp_features.hotkey_wlsw = 1;
3327 radiosw_state = !!tpacpi_wlsw_emulstate;
3328 pr_info("radio switch emulation enabled\n");
3329 } else
3330 #endif
3331 /* Not all thinkpads have a hardware radio switch */
3332 if (acpi_evalf(hkey_handle, &status, "WLSW", "qd")) {
3333 tp_features.hotkey_wlsw = 1;
3334 radiosw_state = !!status;
3335 pr_info("radio switch found; radios are %s\n",
3336 enabled(status, 0));
3337 }
3338 if (tp_features.hotkey_wlsw)
3339 res = add_to_attr_set(hotkey_dev_attributes,
3340 &dev_attr_hotkey_radio_sw.attr);
3341
3342 /* For X41t, X60t, X61t Tablets... */
3343 if (!res && acpi_evalf(hkey_handle, &status, "MHKG", "qd")) {
3344 tp_features.hotkey_tablet = 1;
3345 tabletsw_state = !!(status & TP_HOTKEY_TABLET_MASK);
3346 pr_info("possible tablet mode switch found; "
3347 "ThinkPad in %s mode\n",
3348 (tabletsw_state) ? "tablet" : "laptop");
3349 res = add_to_attr_set(hotkey_dev_attributes,
3350 &dev_attr_hotkey_tablet_mode.attr);
3351 }
3352
3353 if (!res)
3354 res = register_attr_set_with_sysfs(
3355 hotkey_dev_attributes,
3356 &tpacpi_pdev->dev.kobj);
3357 if (res)
3358 goto err_exit;
3359
3360 /* Set up key map */
3361 hotkey_keycode_map = kmalloc(TPACPI_HOTKEY_MAP_SIZE,
3362 GFP_KERNEL);
3363 if (!hotkey_keycode_map) {
3364 pr_err("failed to allocate memory for key map\n");
3365 res = -ENOMEM;
3366 goto err_exit;
3367 }
3368
3369 keymap_id = tpacpi_check_quirks(tpacpi_keymap_qtable,
3370 ARRAY_SIZE(tpacpi_keymap_qtable));
3371 BUG_ON(keymap_id >= ARRAY_SIZE(tpacpi_keymaps));
3372 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3373 "using keymap number %lu\n", keymap_id);
3374
3375 memcpy(hotkey_keycode_map, &tpacpi_keymaps[keymap_id],
3376 TPACPI_HOTKEY_MAP_SIZE);
3377
3378 input_set_capability(tpacpi_inputdev, EV_MSC, MSC_SCAN);
3379 tpacpi_inputdev->keycodesize = TPACPI_HOTKEY_MAP_TYPESIZE;
3380 tpacpi_inputdev->keycodemax = TPACPI_HOTKEY_MAP_LEN;
3381 tpacpi_inputdev->keycode = hotkey_keycode_map;
3382 for (i = 0; i < TPACPI_HOTKEY_MAP_LEN; i++) {
3383 if (hotkey_keycode_map[i] != KEY_RESERVED) {
3384 input_set_capability(tpacpi_inputdev, EV_KEY,
3385 hotkey_keycode_map[i]);
3386 } else {
3387 if (i < sizeof(hotkey_reserved_mask)*8)
3388 hotkey_reserved_mask |= 1 << i;
3389 }
3390 }
3391
3392 if (tp_features.hotkey_wlsw) {
3393 input_set_capability(tpacpi_inputdev, EV_SW, SW_RFKILL_ALL);
3394 input_report_switch(tpacpi_inputdev,
3395 SW_RFKILL_ALL, radiosw_state);
3396 }
3397 if (tp_features.hotkey_tablet) {
3398 input_set_capability(tpacpi_inputdev, EV_SW, SW_TABLET_MODE);
3399 input_report_switch(tpacpi_inputdev,
3400 SW_TABLET_MODE, tabletsw_state);
3401 }
3402
3403 /* Do not issue duplicate brightness change events to
3404 * userspace. tpacpi_detect_brightness_capabilities() must have
3405 * been called before this point */
3406 if (acpi_video_backlight_support()) {
3407 pr_info("This ThinkPad has standard ACPI backlight "
3408 "brightness control, supported by the ACPI "
3409 "video driver\n");
3410 pr_notice("Disabling thinkpad-acpi brightness events "
3411 "by default...\n");
3412
3413 /* Disable brightness up/down on Lenovo thinkpads when
3414 * ACPI is handling them, otherwise it is plain impossible
3415 * for userspace to do something even remotely sane */
3416 hotkey_reserved_mask |=
3417 (1 << TP_ACPI_HOTKEYSCAN_FNHOME)
3418 | (1 << TP_ACPI_HOTKEYSCAN_FNEND);
3419 hotkey_unmap(TP_ACPI_HOTKEYSCAN_FNHOME);
3420 hotkey_unmap(TP_ACPI_HOTKEYSCAN_FNEND);
3421 }
3422
3423 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
3424 hotkey_source_mask = TPACPI_HKEY_NVRAM_GOOD_MASK
3425 & ~hotkey_all_mask
3426 & ~hotkey_reserved_mask;
3427
3428 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3429 "hotkey source mask 0x%08x, polling freq %u\n",
3430 hotkey_source_mask, hotkey_poll_freq);
3431 #endif
3432
3433 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3434 "enabling firmware HKEY event interface...\n");
3435 res = hotkey_status_set(true);
3436 if (res) {
3437 hotkey_exit();
3438 return res;
3439 }
3440 res = hotkey_mask_set(((hotkey_all_mask & ~hotkey_reserved_mask)
3441 | hotkey_driver_mask)
3442 & ~hotkey_source_mask);
3443 if (res < 0 && res != -ENXIO) {
3444 hotkey_exit();
3445 return res;
3446 }
3447 hotkey_user_mask = (hotkey_acpi_mask | hotkey_source_mask)
3448 & ~hotkey_reserved_mask;
3449 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3450 "initial masks: user=0x%08x, fw=0x%08x, poll=0x%08x\n",
3451 hotkey_user_mask, hotkey_acpi_mask, hotkey_source_mask);
3452
3453 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3454 "legacy ibm/hotkey event reporting over procfs %s\n",
3455 (hotkey_report_mode < 2) ?
3456 "enabled" : "disabled");
3457
3458 tpacpi_inputdev->open = &hotkey_inputdev_open;
3459 tpacpi_inputdev->close = &hotkey_inputdev_close;
3460
3461 hotkey_poll_setup_safe(true);
3462
3463 return 0;
3464
3465 err_exit:
3466 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
3467 hotkey_dev_attributes = NULL;
3468
3469 return (res < 0)? res : 1;
3470 }
3471
3472 static bool hotkey_notify_hotkey(const u32 hkey,
3473 bool *send_acpi_ev,
3474 bool *ignore_acpi_ev)
3475 {
3476 /* 0x1000-0x1FFF: key presses */
3477 unsigned int scancode = hkey & 0xfff;
3478 *send_acpi_ev = true;
3479 *ignore_acpi_ev = false;
3480
3481 /* HKEY event 0x1001 is scancode 0x00 */
3482 if (scancode > 0 && scancode <= TPACPI_HOTKEY_MAP_LEN) {
3483 scancode--;
3484 if (!(hotkey_source_mask & (1 << scancode))) {
3485 tpacpi_input_send_key_masked(scancode);
3486 *send_acpi_ev = false;
3487 } else {
3488 *ignore_acpi_ev = true;
3489 }
3490 return true;
3491 }
3492 return false;
3493 }
3494
3495 static bool hotkey_notify_wakeup(const u32 hkey,
3496 bool *send_acpi_ev,
3497 bool *ignore_acpi_ev)
3498 {
3499 /* 0x2000-0x2FFF: Wakeup reason */
3500 *send_acpi_ev = true;
3501 *ignore_acpi_ev = false;
3502
3503 switch (hkey) {
3504 case TP_HKEY_EV_WKUP_S3_UNDOCK: /* suspend, undock */
3505 case TP_HKEY_EV_WKUP_S4_UNDOCK: /* hibernation, undock */
3506 hotkey_wakeup_reason = TP_ACPI_WAKEUP_UNDOCK;
3507 *ignore_acpi_ev = true;
3508 break;
3509
3510 case TP_HKEY_EV_WKUP_S3_BAYEJ: /* suspend, bay eject */
3511 case TP_HKEY_EV_WKUP_S4_BAYEJ: /* hibernation, bay eject */
3512 hotkey_wakeup_reason = TP_ACPI_WAKEUP_BAYEJ;
3513 *ignore_acpi_ev = true;
3514 break;
3515
3516 case TP_HKEY_EV_WKUP_S3_BATLOW: /* Battery on critical low level/S3 */
3517 case TP_HKEY_EV_WKUP_S4_BATLOW: /* Battery on critical low level/S4 */
3518 pr_alert("EMERGENCY WAKEUP: battery almost empty\n");
3519 /* how to auto-heal: */
3520 /* 2313: woke up from S3, go to S4/S5 */
3521 /* 2413: woke up from S4, go to S5 */
3522 break;
3523
3524 default:
3525 return false;
3526 }
3527
3528 if (hotkey_wakeup_reason != TP_ACPI_WAKEUP_NONE) {
3529 pr_info("woke up due to a hot-unplug request...\n");
3530 hotkey_wakeup_reason_notify_change();
3531 }
3532 return true;
3533 }
3534
3535 static bool hotkey_notify_dockevent(const u32 hkey,
3536 bool *send_acpi_ev,
3537 bool *ignore_acpi_ev)
3538 {
3539 /* 0x4000-0x4FFF: dock-related events */
3540 *send_acpi_ev = true;
3541 *ignore_acpi_ev = false;
3542
3543 switch (hkey) {
3544 case TP_HKEY_EV_UNDOCK_ACK:
3545 /* ACPI undock operation completed after wakeup */
3546 hotkey_autosleep_ack = 1;
3547 pr_info("undocked\n");
3548 hotkey_wakeup_hotunplug_complete_notify_change();
3549 return true;
3550
3551 case TP_HKEY_EV_HOTPLUG_DOCK: /* docked to port replicator */
3552 pr_info("docked into hotplug port replicator\n");
3553 return true;
3554 case TP_HKEY_EV_HOTPLUG_UNDOCK: /* undocked from port replicator */
3555 pr_info("undocked from hotplug port replicator\n");
3556 return true;
3557
3558 default:
3559 return false;
3560 }
3561 }
3562
3563 static bool hotkey_notify_usrevent(const u32 hkey,
3564 bool *send_acpi_ev,
3565 bool *ignore_acpi_ev)
3566 {
3567 /* 0x5000-0x5FFF: human interface helpers */
3568 *send_acpi_ev = true;
3569 *ignore_acpi_ev = false;
3570
3571 switch (hkey) {
3572 case TP_HKEY_EV_PEN_INSERTED: /* X61t: tablet pen inserted into bay */
3573 case TP_HKEY_EV_PEN_REMOVED: /* X61t: tablet pen removed from bay */
3574 return true;
3575
3576 case TP_HKEY_EV_TABLET_TABLET: /* X41t-X61t: tablet mode */
3577 case TP_HKEY_EV_TABLET_NOTEBOOK: /* X41t-X61t: normal mode */
3578 tpacpi_input_send_tabletsw();
3579 hotkey_tablet_mode_notify_change();
3580 *send_acpi_ev = false;
3581 return true;
3582
3583 case TP_HKEY_EV_LID_CLOSE: /* Lid closed */
3584 case TP_HKEY_EV_LID_OPEN: /* Lid opened */
3585 case TP_HKEY_EV_BRGHT_CHANGED: /* brightness changed */
3586 /* do not propagate these events */
3587 *ignore_acpi_ev = true;
3588 return true;
3589
3590 default:
3591 return false;
3592 }
3593 }
3594
3595 static void thermal_dump_all_sensors(void);
3596
3597 static bool hotkey_notify_6xxx(const u32 hkey,
3598 bool *send_acpi_ev,
3599 bool *ignore_acpi_ev)
3600 {
3601 bool known = true;
3602
3603 /* 0x6000-0x6FFF: thermal alarms/notices and keyboard events */
3604 *send_acpi_ev = true;
3605 *ignore_acpi_ev = false;
3606
3607 switch (hkey) {
3608 case TP_HKEY_EV_THM_TABLE_CHANGED:
3609 pr_info("EC reports that Thermal Table has changed\n");
3610 /* recommended action: do nothing, we don't have
3611 * Lenovo ATM information */
3612 return true;
3613 case TP_HKEY_EV_ALARM_BAT_HOT:
3614 pr_crit("THERMAL ALARM: battery is too hot!\n");
3615 /* recommended action: warn user through gui */
3616 break;
3617 case TP_HKEY_EV_ALARM_BAT_XHOT:
3618 pr_alert("THERMAL EMERGENCY: battery is extremely hot!\n");
3619 /* recommended action: immediate sleep/hibernate */
3620 break;
3621 case TP_HKEY_EV_ALARM_SENSOR_HOT:
3622 pr_crit("THERMAL ALARM: "
3623 "a sensor reports something is too hot!\n");
3624 /* recommended action: warn user through gui, that */
3625 /* some internal component is too hot */
3626 break;
3627 case TP_HKEY_EV_ALARM_SENSOR_XHOT:
3628 pr_alert("THERMAL EMERGENCY: "
3629 "a sensor reports something is extremely hot!\n");
3630 /* recommended action: immediate sleep/hibernate */
3631 break;
3632
3633 case TP_HKEY_EV_KEY_NUMLOCK:
3634 case TP_HKEY_EV_KEY_FN:
3635 /* key press events, we just ignore them as long as the EC
3636 * is still reporting them in the normal keyboard stream */
3637 *send_acpi_ev = false;
3638 *ignore_acpi_ev = true;
3639 return true;
3640
3641 default:
3642 pr_warn("unknown possible thermal alarm or keyboard event received\n");
3643 known = false;
3644 }
3645
3646 thermal_dump_all_sensors();
3647
3648 return known;
3649 }
3650
3651 static void hotkey_notify(struct ibm_struct *ibm, u32 event)
3652 {
3653 u32 hkey;
3654 bool send_acpi_ev;
3655 bool ignore_acpi_ev;
3656 bool known_ev;
3657
3658 if (event != 0x80) {
3659 pr_err("unknown HKEY notification event %d\n", event);
3660 /* forward it to userspace, maybe it knows how to handle it */
3661 acpi_bus_generate_netlink_event(
3662 ibm->acpi->device->pnp.device_class,
3663 dev_name(&ibm->acpi->device->dev),
3664 event, 0);
3665 return;
3666 }
3667
3668 while (1) {
3669 if (!acpi_evalf(hkey_handle, &hkey, "MHKP", "d")) {
3670 pr_err("failed to retrieve HKEY event\n");
3671 return;
3672 }
3673
3674 if (hkey == 0) {
3675 /* queue empty */
3676 return;
3677 }
3678
3679 send_acpi_ev = true;
3680 ignore_acpi_ev = false;
3681
3682 switch (hkey >> 12) {
3683 case 1:
3684 /* 0x1000-0x1FFF: key presses */
3685 known_ev = hotkey_notify_hotkey(hkey, &send_acpi_ev,
3686 &ignore_acpi_ev);
3687 break;
3688 case 2:
3689 /* 0x2000-0x2FFF: Wakeup reason */
3690 known_ev = hotkey_notify_wakeup(hkey, &send_acpi_ev,
3691 &ignore_acpi_ev);
3692 break;
3693 case 3:
3694 /* 0x3000-0x3FFF: bay-related wakeups */
3695 switch (hkey) {
3696 case TP_HKEY_EV_BAYEJ_ACK:
3697 hotkey_autosleep_ack = 1;
3698 pr_info("bay ejected\n");
3699 hotkey_wakeup_hotunplug_complete_notify_change();
3700 known_ev = true;
3701 break;
3702 case TP_HKEY_EV_OPTDRV_EJ:
3703 /* FIXME: kick libata if SATA link offline */
3704 known_ev = true;
3705 break;
3706 default:
3707 known_ev = false;
3708 }
3709 break;
3710 case 4:
3711 /* 0x4000-0x4FFF: dock-related events */
3712 known_ev = hotkey_notify_dockevent(hkey, &send_acpi_ev,
3713 &ignore_acpi_ev);
3714 break;
3715 case 5:
3716 /* 0x5000-0x5FFF: human interface helpers */
3717 known_ev = hotkey_notify_usrevent(hkey, &send_acpi_ev,
3718 &ignore_acpi_ev);
3719 break;
3720 case 6:
3721 /* 0x6000-0x6FFF: thermal alarms/notices and
3722 * keyboard events */
3723 known_ev = hotkey_notify_6xxx(hkey, &send_acpi_ev,
3724 &ignore_acpi_ev);
3725 break;
3726 case 7:
3727 /* 0x7000-0x7FFF: misc */
3728 if (tp_features.hotkey_wlsw &&
3729 hkey == TP_HKEY_EV_RFKILL_CHANGED) {
3730 tpacpi_send_radiosw_update();
3731 send_acpi_ev = 0;
3732 known_ev = true;
3733 break;
3734 }
3735 /* fallthrough to default */
3736 default:
3737 known_ev = false;
3738 }
3739 if (!known_ev) {
3740 pr_notice("unhandled HKEY event 0x%04x\n", hkey);
3741 pr_notice("please report the conditions when this "
3742 "event happened to %s\n", TPACPI_MAIL);
3743 }
3744
3745 /* Legacy events */
3746 if (!ignore_acpi_ev &&
3747 (send_acpi_ev || hotkey_report_mode < 2)) {
3748 acpi_bus_generate_proc_event(ibm->acpi->device,
3749 event, hkey);
3750 }
3751
3752 /* netlink events */
3753 if (!ignore_acpi_ev && send_acpi_ev) {
3754 acpi_bus_generate_netlink_event(
3755 ibm->acpi->device->pnp.device_class,
3756 dev_name(&ibm->acpi->device->dev),
3757 event, hkey);
3758 }
3759 }
3760 }
3761
3762 static void hotkey_suspend(void)
3763 {
3764 /* Do these on suspend, we get the events on early resume! */
3765 hotkey_wakeup_reason = TP_ACPI_WAKEUP_NONE;
3766 hotkey_autosleep_ack = 0;
3767 }
3768
3769 static void hotkey_resume(void)
3770 {
3771 tpacpi_disable_brightness_delay();
3772
3773 if (hotkey_status_set(true) < 0 ||
3774 hotkey_mask_set(hotkey_acpi_mask) < 0)
3775 pr_err("error while attempting to reset the event "
3776 "firmware interface\n");
3777
3778 tpacpi_send_radiosw_update();
3779 hotkey_tablet_mode_notify_change();
3780 hotkey_wakeup_reason_notify_change();
3781 hotkey_wakeup_hotunplug_complete_notify_change();
3782 hotkey_poll_setup_safe(false);
3783 }
3784
3785 /* procfs -------------------------------------------------------------- */
3786 static int hotkey_read(struct seq_file *m)
3787 {
3788 int res, status;
3789
3790 if (!tp_features.hotkey) {
3791 seq_printf(m, "status:\t\tnot supported\n");
3792 return 0;
3793 }
3794
3795 if (mutex_lock_killable(&hotkey_mutex))
3796 return -ERESTARTSYS;
3797 res = hotkey_status_get(&status);
3798 if (!res)
3799 res = hotkey_mask_get();
3800 mutex_unlock(&hotkey_mutex);
3801 if (res)
3802 return res;
3803
3804 seq_printf(m, "status:\t\t%s\n", enabled(status, 0));
3805 if (hotkey_all_mask) {
3806 seq_printf(m, "mask:\t\t0x%08x\n", hotkey_user_mask);
3807 seq_printf(m, "commands:\tenable, disable, reset, <mask>\n");
3808 } else {
3809 seq_printf(m, "mask:\t\tnot supported\n");
3810 seq_printf(m, "commands:\tenable, disable, reset\n");
3811 }
3812
3813 return 0;
3814 }
3815
3816 static void hotkey_enabledisable_warn(bool enable)
3817 {
3818 tpacpi_log_usertask("procfs hotkey enable/disable");
3819 if (!WARN((tpacpi_lifecycle == TPACPI_LIFE_RUNNING || !enable),
3820 pr_fmt("hotkey enable/disable functionality has been "
3821 "removed from the driver. "
3822 "Hotkeys are always enabled.\n")))
3823 pr_err("Please remove the hotkey=enable module "
3824 "parameter, it is deprecated. "
3825 "Hotkeys are always enabled.\n");
3826 }
3827
3828 static int hotkey_write(char *buf)
3829 {
3830 int res;
3831 u32 mask;
3832 char *cmd;
3833
3834 if (!tp_features.hotkey)
3835 return -ENODEV;
3836
3837 if (mutex_lock_killable(&hotkey_mutex))
3838 return -ERESTARTSYS;
3839
3840 mask = hotkey_user_mask;
3841
3842 res = 0;
3843 while ((cmd = next_cmd(&buf))) {
3844 if (strlencmp(cmd, "enable") == 0) {
3845 hotkey_enabledisable_warn(1);
3846 } else if (strlencmp(cmd, "disable") == 0) {
3847 hotkey_enabledisable_warn(0);
3848 res = -EPERM;
3849 } else if (strlencmp(cmd, "reset") == 0) {
3850 mask = (hotkey_all_mask | hotkey_source_mask)
3851 & ~hotkey_reserved_mask;
3852 } else if (sscanf(cmd, "0x%x", &mask) == 1) {
3853 /* mask set */
3854 } else if (sscanf(cmd, "%x", &mask) == 1) {
3855 /* mask set */
3856 } else {
3857 res = -EINVAL;
3858 goto errexit;
3859 }
3860 }
3861
3862 if (!res) {
3863 tpacpi_disclose_usertask("procfs hotkey",
3864 "set mask to 0x%08x\n", mask);
3865 res = hotkey_user_mask_set(mask);
3866 }
3867
3868 errexit:
3869 mutex_unlock(&hotkey_mutex);
3870 return res;
3871 }
3872
3873 static const struct acpi_device_id ibm_htk_device_ids[] = {
3874 {TPACPI_ACPI_IBM_HKEY_HID, 0},
3875 {TPACPI_ACPI_LENOVO_HKEY_HID, 0},
3876 {"", 0},
3877 };
3878
3879 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver = {
3880 .hid = ibm_htk_device_ids,
3881 .notify = hotkey_notify,
3882 .handle = &hkey_handle,
3883 .type = ACPI_DEVICE_NOTIFY,
3884 };
3885
3886 static struct ibm_struct hotkey_driver_data = {
3887 .name = "hotkey",
3888 .read = hotkey_read,
3889 .write = hotkey_write,
3890 .exit = hotkey_exit,
3891 .resume = hotkey_resume,
3892 .suspend = hotkey_suspend,
3893 .acpi = &ibm_hotkey_acpidriver,
3894 };
3895
3896 /*************************************************************************
3897 * Bluetooth subdriver
3898 */
3899
3900 enum {
3901 /* ACPI GBDC/SBDC bits */
3902 TP_ACPI_BLUETOOTH_HWPRESENT = 0x01, /* Bluetooth hw available */
3903 TP_ACPI_BLUETOOTH_RADIOSSW = 0x02, /* Bluetooth radio enabled */
3904 TP_ACPI_BLUETOOTH_RESUMECTRL = 0x04, /* Bluetooth state at resume:
3905 0 = disable, 1 = enable */
3906 };
3907
3908 enum {
3909 /* ACPI \BLTH commands */
3910 TP_ACPI_BLTH_GET_ULTRAPORT_ID = 0x00, /* Get Ultraport BT ID */
3911 TP_ACPI_BLTH_GET_PWR_ON_RESUME = 0x01, /* Get power-on-resume state */
3912 TP_ACPI_BLTH_PWR_ON_ON_RESUME = 0x02, /* Resume powered on */
3913 TP_ACPI_BLTH_PWR_OFF_ON_RESUME = 0x03, /* Resume powered off */
3914 TP_ACPI_BLTH_SAVE_STATE = 0x05, /* Save state for S4/S5 */
3915 };
3916
3917 #define TPACPI_RFK_BLUETOOTH_SW_NAME "tpacpi_bluetooth_sw"
3918
3919 static int bluetooth_get_status(void)
3920 {
3921 int status;
3922
3923 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3924 if (dbg_bluetoothemul)
3925 return (tpacpi_bluetooth_emulstate) ?
3926 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
3927 #endif
3928
3929 if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
3930 return -EIO;
3931
3932 return ((status & TP_ACPI_BLUETOOTH_RADIOSSW) != 0) ?
3933 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
3934 }
3935
3936 static int bluetooth_set_status(enum tpacpi_rfkill_state state)
3937 {
3938 int status;
3939
3940 vdbg_printk(TPACPI_DBG_RFKILL,
3941 "will attempt to %s bluetooth\n",
3942 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable");
3943
3944 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3945 if (dbg_bluetoothemul) {
3946 tpacpi_bluetooth_emulstate = (state == TPACPI_RFK_RADIO_ON);
3947 return 0;
3948 }
3949 #endif
3950
3951 if (state == TPACPI_RFK_RADIO_ON)
3952 status = TP_ACPI_BLUETOOTH_RADIOSSW
3953 | TP_ACPI_BLUETOOTH_RESUMECTRL;
3954 else
3955 status = 0;
3956
3957 if (!acpi_evalf(hkey_handle, NULL, "SBDC", "vd", status))
3958 return -EIO;
3959
3960 return 0;
3961 }
3962
3963 /* sysfs bluetooth enable ---------------------------------------------- */
3964 static ssize_t bluetooth_enable_show(struct device *dev,
3965 struct device_attribute *attr,
3966 char *buf)
3967 {
3968 return tpacpi_rfk_sysfs_enable_show(TPACPI_RFK_BLUETOOTH_SW_ID,
3969 attr, buf);
3970 }
3971
3972 static ssize_t bluetooth_enable_store(struct device *dev,
3973 struct device_attribute *attr,
3974 const char *buf, size_t count)
3975 {
3976 return tpacpi_rfk_sysfs_enable_store(TPACPI_RFK_BLUETOOTH_SW_ID,
3977 attr, buf, count);
3978 }
3979
3980 static struct device_attribute dev_attr_bluetooth_enable =
3981 __ATTR(bluetooth_enable, S_IWUSR | S_IRUGO,
3982 bluetooth_enable_show, bluetooth_enable_store);
3983
3984 /* --------------------------------------------------------------------- */
3985
3986 static struct attribute *bluetooth_attributes[] = {
3987 &dev_attr_bluetooth_enable.attr,
3988 NULL
3989 };
3990
3991 static const struct attribute_group bluetooth_attr_group = {
3992 .attrs = bluetooth_attributes,
3993 };
3994
3995 static const struct tpacpi_rfk_ops bluetooth_tprfk_ops = {
3996 .get_status = bluetooth_get_status,
3997 .set_status = bluetooth_set_status,
3998 };
3999
4000 static void bluetooth_shutdown(void)
4001 {
4002 /* Order firmware to save current state to NVRAM */
4003 if (!acpi_evalf(NULL, NULL, "\\BLTH", "vd",
4004 TP_ACPI_BLTH_SAVE_STATE))
4005 pr_notice("failed to save bluetooth state to NVRAM\n");
4006 else
4007 vdbg_printk(TPACPI_DBG_RFKILL,
4008 "bluetooth state saved to NVRAM\n");
4009 }
4010
4011 static void bluetooth_exit(void)
4012 {
4013 sysfs_remove_group(&tpacpi_pdev->dev.kobj,
4014 &bluetooth_attr_group);
4015
4016 tpacpi_destroy_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID);
4017
4018 bluetooth_shutdown();
4019 }
4020
4021 static int __init bluetooth_init(struct ibm_init_struct *iibm)
4022 {
4023 int res;
4024 int status = 0;
4025
4026 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4027 "initializing bluetooth subdriver\n");
4028
4029 TPACPI_ACPIHANDLE_INIT(hkey);
4030
4031 /* bluetooth not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
4032 G4x, R30, R31, R40e, R50e, T20-22, X20-21 */
4033 tp_features.bluetooth = hkey_handle &&
4034 acpi_evalf(hkey_handle, &status, "GBDC", "qd");
4035
4036 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4037 "bluetooth is %s, status 0x%02x\n",
4038 str_supported(tp_features.bluetooth),
4039 status);
4040
4041 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4042 if (dbg_bluetoothemul) {
4043 tp_features.bluetooth = 1;
4044 pr_info("bluetooth switch emulation enabled\n");
4045 } else
4046 #endif
4047 if (tp_features.bluetooth &&
4048 !(status & TP_ACPI_BLUETOOTH_HWPRESENT)) {
4049 /* no bluetooth hardware present in system */
4050 tp_features.bluetooth = 0;
4051 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4052 "bluetooth hardware not installed\n");
4053 }
4054
4055 if (!tp_features.bluetooth)
4056 return 1;
4057
4058 res = tpacpi_new_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID,
4059 &bluetooth_tprfk_ops,
4060 RFKILL_TYPE_BLUETOOTH,
4061 TPACPI_RFK_BLUETOOTH_SW_NAME,
4062 true);
4063 if (res)
4064 return res;
4065
4066 res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
4067 &bluetooth_attr_group);
4068 if (res) {
4069 tpacpi_destroy_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID);
4070 return res;
4071 }
4072
4073 return 0;
4074 }
4075
4076 /* procfs -------------------------------------------------------------- */
4077 static int bluetooth_read(struct seq_file *m)
4078 {
4079 return tpacpi_rfk_procfs_read(TPACPI_RFK_BLUETOOTH_SW_ID, m);
4080 }
4081
4082 static int bluetooth_write(char *buf)
4083 {
4084 return tpacpi_rfk_procfs_write(TPACPI_RFK_BLUETOOTH_SW_ID, buf);
4085 }
4086
4087 static struct ibm_struct bluetooth_driver_data = {
4088 .name = "bluetooth",
4089 .read = bluetooth_read,
4090 .write = bluetooth_write,
4091 .exit = bluetooth_exit,
4092 .shutdown = bluetooth_shutdown,
4093 };
4094
4095 /*************************************************************************
4096 * Wan subdriver
4097 */
4098
4099 enum {
4100 /* ACPI GWAN/SWAN bits */
4101 TP_ACPI_WANCARD_HWPRESENT = 0x01, /* Wan hw available */
4102 TP_ACPI_WANCARD_RADIOSSW = 0x02, /* Wan radio enabled */
4103 TP_ACPI_WANCARD_RESUMECTRL = 0x04, /* Wan state at resume:
4104 0 = disable, 1 = enable */
4105 };
4106
4107 #define TPACPI_RFK_WWAN_SW_NAME "tpacpi_wwan_sw"
4108
4109 static int wan_get_status(void)
4110 {
4111 int status;
4112
4113 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4114 if (dbg_wwanemul)
4115 return (tpacpi_wwan_emulstate) ?
4116 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4117 #endif
4118
4119 if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
4120 return -EIO;
4121
4122 return ((status & TP_ACPI_WANCARD_RADIOSSW) != 0) ?
4123 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4124 }
4125
4126 static int wan_set_status(enum tpacpi_rfkill_state state)
4127 {
4128 int status;
4129
4130 vdbg_printk(TPACPI_DBG_RFKILL,
4131 "will attempt to %s wwan\n",
4132 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable");
4133
4134 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4135 if (dbg_wwanemul) {
4136 tpacpi_wwan_emulstate = (state == TPACPI_RFK_RADIO_ON);
4137 return 0;
4138 }
4139 #endif
4140
4141 if (state == TPACPI_RFK_RADIO_ON)
4142 status = TP_ACPI_WANCARD_RADIOSSW
4143 | TP_ACPI_WANCARD_RESUMECTRL;
4144 else
4145 status = 0;
4146
4147 if (!acpi_evalf(hkey_handle, NULL, "SWAN", "vd", status))
4148 return -EIO;
4149
4150 return 0;
4151 }
4152
4153 /* sysfs wan enable ---------------------------------------------------- */
4154 static ssize_t wan_enable_show(struct device *dev,
4155 struct device_attribute *attr,
4156 char *buf)
4157 {
4158 return tpacpi_rfk_sysfs_enable_show(TPACPI_RFK_WWAN_SW_ID,
4159 attr, buf);
4160 }
4161
4162 static ssize_t wan_enable_store(struct device *dev,
4163 struct device_attribute *attr,
4164 const char *buf, size_t count)
4165 {
4166 return tpacpi_rfk_sysfs_enable_store(TPACPI_RFK_WWAN_SW_ID,
4167 attr, buf, count);
4168 }
4169
4170 static struct device_attribute dev_attr_wan_enable =
4171 __ATTR(wwan_enable, S_IWUSR | S_IRUGO,
4172 wan_enable_show, wan_enable_store);
4173
4174 /* --------------------------------------------------------------------- */
4175
4176 static struct attribute *wan_attributes[] = {
4177 &dev_attr_wan_enable.attr,
4178 NULL
4179 };
4180
4181 static const struct attribute_group wan_attr_group = {
4182 .attrs = wan_attributes,
4183 };
4184
4185 static const struct tpacpi_rfk_ops wan_tprfk_ops = {
4186 .get_status = wan_get_status,
4187 .set_status = wan_set_status,
4188 };
4189
4190 static void wan_shutdown(void)
4191 {
4192 /* Order firmware to save current state to NVRAM */
4193 if (!acpi_evalf(NULL, NULL, "\\WGSV", "vd",
4194 TP_ACPI_WGSV_SAVE_STATE))
4195 pr_notice("failed to save WWAN state to NVRAM\n");
4196 else
4197 vdbg_printk(TPACPI_DBG_RFKILL,
4198 "WWAN state saved to NVRAM\n");
4199 }
4200
4201 static void wan_exit(void)
4202 {
4203 sysfs_remove_group(&tpacpi_pdev->dev.kobj,
4204 &wan_attr_group);
4205
4206 tpacpi_destroy_rfkill(TPACPI_RFK_WWAN_SW_ID);
4207
4208 wan_shutdown();
4209 }
4210
4211 static int __init wan_init(struct ibm_init_struct *iibm)
4212 {
4213 int res;
4214 int status = 0;
4215
4216 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4217 "initializing wan subdriver\n");
4218
4219 TPACPI_ACPIHANDLE_INIT(hkey);
4220
4221 tp_features.wan = hkey_handle &&
4222 acpi_evalf(hkey_handle, &status, "GWAN", "qd");
4223
4224 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4225 "wan is %s, status 0x%02x\n",
4226 str_supported(tp_features.wan),
4227 status);
4228
4229 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4230 if (dbg_wwanemul) {
4231 tp_features.wan = 1;
4232 pr_info("wwan switch emulation enabled\n");
4233 } else
4234 #endif
4235 if (tp_features.wan &&
4236 !(status & TP_ACPI_WANCARD_HWPRESENT)) {
4237 /* no wan hardware present in system */
4238 tp_features.wan = 0;
4239 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4240 "wan hardware not installed\n");
4241 }
4242
4243 if (!tp_features.wan)
4244 return 1;
4245
4246 res = tpacpi_new_rfkill(TPACPI_RFK_WWAN_SW_ID,
4247 &wan_tprfk_ops,
4248 RFKILL_TYPE_WWAN,
4249 TPACPI_RFK_WWAN_SW_NAME,
4250 true);
4251 if (res)
4252 return res;
4253
4254 res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
4255 &wan_attr_group);
4256
4257 if (res) {
4258 tpacpi_destroy_rfkill(TPACPI_RFK_WWAN_SW_ID);
4259 return res;
4260 }
4261
4262 return 0;
4263 }
4264
4265 /* procfs -------------------------------------------------------------- */
4266 static int wan_read(struct seq_file *m)
4267 {
4268 return tpacpi_rfk_procfs_read(TPACPI_RFK_WWAN_SW_ID, m);
4269 }
4270
4271 static int wan_write(char *buf)
4272 {
4273 return tpacpi_rfk_procfs_write(TPACPI_RFK_WWAN_SW_ID, buf);
4274 }
4275
4276 static struct ibm_struct wan_driver_data = {
4277 .name = "wan",
4278 .read = wan_read,
4279 .write = wan_write,
4280 .exit = wan_exit,
4281 .shutdown = wan_shutdown,
4282 };
4283
4284 /*************************************************************************
4285 * UWB subdriver
4286 */
4287
4288 enum {
4289 /* ACPI GUWB/SUWB bits */
4290 TP_ACPI_UWB_HWPRESENT = 0x01, /* UWB hw available */
4291 TP_ACPI_UWB_RADIOSSW = 0x02, /* UWB radio enabled */
4292 };
4293
4294 #define TPACPI_RFK_UWB_SW_NAME "tpacpi_uwb_sw"
4295
4296 static int uwb_get_status(void)
4297 {
4298 int status;
4299
4300 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4301 if (dbg_uwbemul)
4302 return (tpacpi_uwb_emulstate) ?
4303 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4304 #endif
4305
4306 if (!acpi_evalf(hkey_handle, &status, "GUWB", "d"))
4307 return -EIO;
4308
4309 return ((status & TP_ACPI_UWB_RADIOSSW) != 0) ?
4310 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4311 }
4312
4313 static int uwb_set_status(enum tpacpi_rfkill_state state)
4314 {
4315 int status;
4316
4317 vdbg_printk(TPACPI_DBG_RFKILL,
4318 "will attempt to %s UWB\n",
4319 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable");
4320
4321 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4322 if (dbg_uwbemul) {
4323 tpacpi_uwb_emulstate = (state == TPACPI_RFK_RADIO_ON);
4324 return 0;
4325 }
4326 #endif
4327
4328 if (state == TPACPI_RFK_RADIO_ON)
4329 status = TP_ACPI_UWB_RADIOSSW;
4330 else
4331 status = 0;
4332
4333 if (!acpi_evalf(hkey_handle, NULL, "SUWB", "vd", status))
4334 return -EIO;
4335
4336 return 0;
4337 }
4338
4339 /* --------------------------------------------------------------------- */
4340
4341 static const struct tpacpi_rfk_ops uwb_tprfk_ops = {
4342 .get_status = uwb_get_status,
4343 .set_status = uwb_set_status,
4344 };
4345
4346 static void uwb_exit(void)
4347 {
4348 tpacpi_destroy_rfkill(TPACPI_RFK_UWB_SW_ID);
4349 }
4350
4351 static int __init uwb_init(struct ibm_init_struct *iibm)
4352 {
4353 int res;
4354 int status = 0;
4355
4356 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4357 "initializing uwb subdriver\n");
4358
4359 TPACPI_ACPIHANDLE_INIT(hkey);
4360
4361 tp_features.uwb = hkey_handle &&
4362 acpi_evalf(hkey_handle, &status, "GUWB", "qd");
4363
4364 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4365 "uwb is %s, status 0x%02x\n",
4366 str_supported(tp_features.uwb),
4367 status);
4368
4369 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4370 if (dbg_uwbemul) {
4371 tp_features.uwb = 1;
4372 pr_info("uwb switch emulation enabled\n");
4373 } else
4374 #endif
4375 if (tp_features.uwb &&
4376 !(status & TP_ACPI_UWB_HWPRESENT)) {
4377 /* no uwb hardware present in system */
4378 tp_features.uwb = 0;
4379 dbg_printk(TPACPI_DBG_INIT,
4380 "uwb hardware not installed\n");
4381 }
4382
4383 if (!tp_features.uwb)
4384 return 1;
4385
4386 res = tpacpi_new_rfkill(TPACPI_RFK_UWB_SW_ID,
4387 &uwb_tprfk_ops,
4388 RFKILL_TYPE_UWB,
4389 TPACPI_RFK_UWB_SW_NAME,
4390 false);
4391 return res;
4392 }
4393
4394 static struct ibm_struct uwb_driver_data = {
4395 .name = "uwb",
4396 .exit = uwb_exit,
4397 .flags.experimental = 1,
4398 };
4399
4400 /*************************************************************************
4401 * Video subdriver
4402 */
4403
4404 #ifdef CONFIG_THINKPAD_ACPI_VIDEO
4405
4406 enum video_access_mode {
4407 TPACPI_VIDEO_NONE = 0,
4408 TPACPI_VIDEO_570, /* 570 */
4409 TPACPI_VIDEO_770, /* 600e/x, 770e, 770x */
4410 TPACPI_VIDEO_NEW, /* all others */
4411 };
4412
4413 enum { /* video status flags, based on VIDEO_570 */
4414 TP_ACPI_VIDEO_S_LCD = 0x01, /* LCD output enabled */
4415 TP_ACPI_VIDEO_S_CRT = 0x02, /* CRT output enabled */
4416 TP_ACPI_VIDEO_S_DVI = 0x08, /* DVI output enabled */
4417 };
4418
4419 enum { /* TPACPI_VIDEO_570 constants */
4420 TP_ACPI_VIDEO_570_PHSCMD = 0x87, /* unknown magic constant :( */
4421 TP_ACPI_VIDEO_570_PHSMASK = 0x03, /* PHS bits that map to
4422 * video_status_flags */
4423 TP_ACPI_VIDEO_570_PHS2CMD = 0x8b, /* unknown magic constant :( */
4424 TP_ACPI_VIDEO_570_PHS2SET = 0x80, /* unknown magic constant :( */
4425 };
4426
4427 static enum video_access_mode video_supported;
4428 static int video_orig_autosw;
4429
4430 static int video_autosw_get(void);
4431 static int video_autosw_set(int enable);
4432
4433 TPACPI_HANDLE(vid, root,
4434 "\\_SB.PCI.AGP.VGA", /* 570 */
4435 "\\_SB.PCI0.AGP0.VID0", /* 600e/x, 770x */
4436 "\\_SB.PCI0.VID0", /* 770e */
4437 "\\_SB.PCI0.VID", /* A21e, G4x, R50e, X30, X40 */
4438 "\\_SB.PCI0.AGP.VGA", /* X100e and a few others */
4439 "\\_SB.PCI0.AGP.VID", /* all others */
4440 ); /* R30, R31 */
4441
4442 TPACPI_HANDLE(vid2, root, "\\_SB.PCI0.AGPB.VID"); /* G41 */
4443
4444 static int __init video_init(struct ibm_init_struct *iibm)
4445 {
4446 int ivga;
4447
4448 vdbg_printk(TPACPI_DBG_INIT, "initializing video subdriver\n");
4449
4450 TPACPI_ACPIHANDLE_INIT(vid);
4451 if (tpacpi_is_ibm())
4452 TPACPI_ACPIHANDLE_INIT(vid2);
4453
4454 if (vid2_handle && acpi_evalf(NULL, &ivga, "\\IVGA", "d") && ivga)
4455 /* G41, assume IVGA doesn't change */
4456 vid_handle = vid2_handle;
4457
4458 if (!vid_handle)
4459 /* video switching not supported on R30, R31 */
4460 video_supported = TPACPI_VIDEO_NONE;
4461 else if (tpacpi_is_ibm() &&
4462 acpi_evalf(vid_handle, &video_orig_autosw, "SWIT", "qd"))
4463 /* 570 */
4464 video_supported = TPACPI_VIDEO_570;
4465 else if (tpacpi_is_ibm() &&
4466 acpi_evalf(vid_handle, &video_orig_autosw, "^VADL", "qd"))
4467 /* 600e/x, 770e, 770x */
4468 video_supported = TPACPI_VIDEO_770;
4469 else
4470 /* all others */
4471 video_supported = TPACPI_VIDEO_NEW;
4472
4473 vdbg_printk(TPACPI_DBG_INIT, "video is %s, mode %d\n",
4474 str_supported(video_supported != TPACPI_VIDEO_NONE),
4475 video_supported);
4476
4477 return (video_supported != TPACPI_VIDEO_NONE)? 0 : 1;
4478 }
4479
4480 static void video_exit(void)
4481 {
4482 dbg_printk(TPACPI_DBG_EXIT,
4483 "restoring original video autoswitch mode\n");
4484 if (video_autosw_set(video_orig_autosw))
4485 pr_err("error while trying to restore original "
4486 "video autoswitch mode\n");
4487 }
4488
4489 static int video_outputsw_get(void)
4490 {
4491 int status = 0;
4492 int i;
4493
4494 switch (video_supported) {
4495 case TPACPI_VIDEO_570:
4496 if (!acpi_evalf(NULL, &i, "\\_SB.PHS", "dd",
4497 TP_ACPI_VIDEO_570_PHSCMD))
4498 return -EIO;
4499 status = i & TP_ACPI_VIDEO_570_PHSMASK;
4500 break;
4501 case TPACPI_VIDEO_770:
4502 if (!acpi_evalf(NULL, &i, "\\VCDL", "d"))
4503 return -EIO;
4504 if (i)
4505 status |= TP_ACPI_VIDEO_S_LCD;
4506 if (!acpi_evalf(NULL, &i, "\\VCDC", "d"))
4507 return -EIO;
4508 if (i)
4509 status |= TP_ACPI_VIDEO_S_CRT;
4510 break;
4511 case TPACPI_VIDEO_NEW:
4512 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 1) ||
4513 !acpi_evalf(NULL, &i, "\\VCDC", "d"))
4514 return -EIO;
4515 if (i)
4516 status |= TP_ACPI_VIDEO_S_CRT;
4517
4518 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0) ||
4519 !acpi_evalf(NULL, &i, "\\VCDL", "d"))
4520 return -EIO;
4521 if (i)
4522 status |= TP_ACPI_VIDEO_S_LCD;
4523 if (!acpi_evalf(NULL, &i, "\\VCDD", "d"))
4524 return -EIO;
4525 if (i)
4526 status |= TP_ACPI_VIDEO_S_DVI;
4527 break;
4528 default:
4529 return -ENOSYS;
4530 }
4531
4532 return status;
4533 }
4534
4535 static int video_outputsw_set(int status)
4536 {
4537 int autosw;
4538 int res = 0;
4539
4540 switch (video_supported) {
4541 case TPACPI_VIDEO_570:
4542 res = acpi_evalf(NULL, NULL,
4543 "\\_SB.PHS2", "vdd",
4544 TP_ACPI_VIDEO_570_PHS2CMD,
4545 status | TP_ACPI_VIDEO_570_PHS2SET);
4546 break;
4547 case TPACPI_VIDEO_770:
4548 autosw = video_autosw_get();
4549 if (autosw < 0)
4550 return autosw;
4551
4552 res = video_autosw_set(1);
4553 if (res)
4554 return res;
4555 res = acpi_evalf(vid_handle, NULL,
4556 "ASWT", "vdd", status * 0x100, 0);
4557 if (!autosw && video_autosw_set(autosw)) {
4558 pr_err("video auto-switch left enabled due to error\n");
4559 return -EIO;
4560 }
4561 break;
4562 case TPACPI_VIDEO_NEW:
4563 res = acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0x80) &&
4564 acpi_evalf(NULL, NULL, "\\VSDS", "vdd", status, 1);
4565 break;
4566 default:
4567 return -ENOSYS;
4568 }
4569
4570 return (res)? 0 : -EIO;
4571 }
4572
4573 static int video_autosw_get(void)
4574 {
4575 int autosw = 0;
4576
4577 switch (video_supported) {
4578 case TPACPI_VIDEO_570:
4579 if (!acpi_evalf(vid_handle, &autosw, "SWIT", "d"))
4580 return -EIO;
4581 break;
4582 case TPACPI_VIDEO_770:
4583 case TPACPI_VIDEO_NEW:
4584 if (!acpi_evalf(vid_handle, &autosw, "^VDEE", "d"))
4585 return -EIO;
4586 break;
4587 default:
4588 return -ENOSYS;
4589 }
4590
4591 return autosw & 1;
4592 }
4593
4594 static int video_autosw_set(int enable)
4595 {
4596 if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", (enable)? 1 : 0))
4597 return -EIO;
4598 return 0;
4599 }
4600
4601 static int video_outputsw_cycle(void)
4602 {
4603 int autosw = video_autosw_get();
4604 int res;
4605
4606 if (autosw < 0)
4607 return autosw;
4608
4609 switch (video_supported) {
4610 case TPACPI_VIDEO_570:
4611 res = video_autosw_set(1);
4612 if (res)
4613 return res;
4614 res = acpi_evalf(ec_handle, NULL, "_Q16", "v");
4615 break;
4616 case TPACPI_VIDEO_770:
4617 case TPACPI_VIDEO_NEW:
4618 res = video_autosw_set(1);
4619 if (res)
4620 return res;
4621 res = acpi_evalf(vid_handle, NULL, "VSWT", "v");
4622 break;
4623 default:
4624 return -ENOSYS;
4625 }
4626 if (!autosw && video_autosw_set(autosw)) {
4627 pr_err("video auto-switch left enabled due to error\n");
4628 return -EIO;
4629 }
4630
4631 return (res)? 0 : -EIO;
4632 }
4633
4634 static int video_expand_toggle(void)
4635 {
4636 switch (video_supported) {
4637 case TPACPI_VIDEO_570:
4638 return acpi_evalf(ec_handle, NULL, "_Q17", "v")?
4639 0 : -EIO;
4640 case TPACPI_VIDEO_770:
4641 return acpi_evalf(vid_handle, NULL, "VEXP", "v")?
4642 0 : -EIO;
4643 case TPACPI_VIDEO_NEW:
4644 return acpi_evalf(NULL, NULL, "\\VEXP", "v")?
4645 0 : -EIO;
4646 default:
4647 return -ENOSYS;
4648 }
4649 /* not reached */
4650 }
4651
4652 static int video_read(struct seq_file *m)
4653 {
4654 int status, autosw;
4655
4656 if (video_supported == TPACPI_VIDEO_NONE) {
4657 seq_printf(m, "status:\t\tnot supported\n");
4658 return 0;
4659 }
4660
4661 /* Even reads can crash X.org, so... */
4662 if (!capable(CAP_SYS_ADMIN))
4663 return -EPERM;
4664
4665 status = video_outputsw_get();
4666 if (status < 0)
4667 return status;
4668
4669 autosw = video_autosw_get();
4670 if (autosw < 0)
4671 return autosw;
4672
4673 seq_printf(m, "status:\t\tsupported\n");
4674 seq_printf(m, "lcd:\t\t%s\n", enabled(status, 0));
4675 seq_printf(m, "crt:\t\t%s\n", enabled(status, 1));
4676 if (video_supported == TPACPI_VIDEO_NEW)
4677 seq_printf(m, "dvi:\t\t%s\n", enabled(status, 3));
4678 seq_printf(m, "auto:\t\t%s\n", enabled(autosw, 0));
4679 seq_printf(m, "commands:\tlcd_enable, lcd_disable\n");
4680 seq_printf(m, "commands:\tcrt_enable, crt_disable\n");
4681 if (video_supported == TPACPI_VIDEO_NEW)
4682 seq_printf(m, "commands:\tdvi_enable, dvi_disable\n");
4683 seq_printf(m, "commands:\tauto_enable, auto_disable\n");
4684 seq_printf(m, "commands:\tvideo_switch, expand_toggle\n");
4685
4686 return 0;
4687 }
4688
4689 static int video_write(char *buf)
4690 {
4691 char *cmd;
4692 int enable, disable, status;
4693 int res;
4694
4695 if (video_supported == TPACPI_VIDEO_NONE)
4696 return -ENODEV;
4697
4698 /* Even reads can crash X.org, let alone writes... */
4699 if (!capable(CAP_SYS_ADMIN))
4700 return -EPERM;
4701
4702 enable = 0;
4703 disable = 0;
4704
4705 while ((cmd = next_cmd(&buf))) {
4706 if (strlencmp(cmd, "lcd_enable") == 0) {
4707 enable |= TP_ACPI_VIDEO_S_LCD;
4708 } else if (strlencmp(cmd, "lcd_disable") == 0) {
4709 disable |= TP_ACPI_VIDEO_S_LCD;
4710 } else if (strlencmp(cmd, "crt_enable") == 0) {
4711 enable |= TP_ACPI_VIDEO_S_CRT;
4712 } else if (strlencmp(cmd, "crt_disable") == 0) {
4713 disable |= TP_ACPI_VIDEO_S_CRT;
4714 } else if (video_supported == TPACPI_VIDEO_NEW &&
4715 strlencmp(cmd, "dvi_enable") == 0) {
4716 enable |= TP_ACPI_VIDEO_S_DVI;
4717 } else if (video_supported == TPACPI_VIDEO_NEW &&
4718 strlencmp(cmd, "dvi_disable") == 0) {
4719 disable |= TP_ACPI_VIDEO_S_DVI;
4720 } else if (strlencmp(cmd, "auto_enable") == 0) {
4721 res = video_autosw_set(1);
4722 if (res)
4723 return res;
4724 } else if (strlencmp(cmd, "auto_disable") == 0) {
4725 res = video_autosw_set(0);
4726 if (res)
4727 return res;
4728 } else if (strlencmp(cmd, "video_switch") == 0) {
4729 res = video_outputsw_cycle();
4730 if (res)
4731 return res;
4732 } else if (strlencmp(cmd, "expand_toggle") == 0) {
4733 res = video_expand_toggle();
4734 if (res)
4735 return res;
4736 } else
4737 return -EINVAL;
4738 }
4739
4740 if (enable || disable) {
4741 status = video_outputsw_get();
4742 if (status < 0)
4743 return status;
4744 res = video_outputsw_set((status & ~disable) | enable);
4745 if (res)
4746 return res;
4747 }
4748
4749 return 0;
4750 }
4751
4752 static struct ibm_struct video_driver_data = {
4753 .name = "video",
4754 .read = video_read,
4755 .write = video_write,
4756 .exit = video_exit,
4757 };
4758
4759 #endif /* CONFIG_THINKPAD_ACPI_VIDEO */
4760
4761 /*************************************************************************
4762 * Light (thinklight) subdriver
4763 */
4764
4765 TPACPI_HANDLE(lght, root, "\\LGHT"); /* A21e, A2xm/p, T20-22, X20-21 */
4766 TPACPI_HANDLE(ledb, ec, "LEDB"); /* G4x */
4767
4768 static int light_get_status(void)
4769 {
4770 int status = 0;
4771
4772 if (tp_features.light_status) {
4773 if (!acpi_evalf(ec_handle, &status, "KBLT", "d"))
4774 return -EIO;
4775 return (!!status);
4776 }
4777
4778 return -ENXIO;
4779 }
4780
4781 static int light_set_status(int status)
4782 {
4783 int rc;
4784
4785 if (tp_features.light) {
4786 if (cmos_handle) {
4787 rc = acpi_evalf(cmos_handle, NULL, NULL, "vd",
4788 (status)?
4789 TP_CMOS_THINKLIGHT_ON :
4790 TP_CMOS_THINKLIGHT_OFF);
4791 } else {
4792 rc = acpi_evalf(lght_handle, NULL, NULL, "vd",
4793 (status)? 1 : 0);
4794 }
4795 return (rc)? 0 : -EIO;
4796 }
4797
4798 return -ENXIO;
4799 }
4800
4801 static void light_set_status_worker(struct work_struct *work)
4802 {
4803 struct tpacpi_led_classdev *data =
4804 container_of(work, struct tpacpi_led_classdev, work);
4805
4806 if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING))
4807 light_set_status((data->new_state != TPACPI_LED_OFF));
4808 }
4809
4810 static void light_sysfs_set(struct led_classdev *led_cdev,
4811 enum led_brightness brightness)
4812 {
4813 struct tpacpi_led_classdev *data =
4814 container_of(led_cdev,
4815 struct tpacpi_led_classdev,
4816 led_classdev);
4817 data->new_state = (brightness != LED_OFF) ?
4818 TPACPI_LED_ON : TPACPI_LED_OFF;
4819 queue_work(tpacpi_wq, &data->work);
4820 }
4821
4822 static enum led_brightness light_sysfs_get(struct led_classdev *led_cdev)
4823 {
4824 return (light_get_status() == 1)? LED_FULL : LED_OFF;
4825 }
4826
4827 static struct tpacpi_led_classdev tpacpi_led_thinklight = {
4828 .led_classdev = {
4829 .name = "tpacpi::thinklight",
4830 .brightness_set = &light_sysfs_set,
4831 .brightness_get = &light_sysfs_get,
4832 }
4833 };
4834
4835 static int __init light_init(struct ibm_init_struct *iibm)
4836 {
4837 int rc;
4838
4839 vdbg_printk(TPACPI_DBG_INIT, "initializing light subdriver\n");
4840
4841 if (tpacpi_is_ibm()) {
4842 TPACPI_ACPIHANDLE_INIT(ledb);
4843 TPACPI_ACPIHANDLE_INIT(lght);
4844 }
4845 TPACPI_ACPIHANDLE_INIT(cmos);
4846 INIT_WORK(&tpacpi_led_thinklight.work, light_set_status_worker);
4847
4848 /* light not supported on 570, 600e/x, 770e, 770x, G4x, R30, R31 */
4849 tp_features.light = (cmos_handle || lght_handle) && !ledb_handle;
4850
4851 if (tp_features.light)
4852 /* light status not supported on
4853 570, 600e/x, 770e, 770x, G4x, R30, R31, R32, X20 */
4854 tp_features.light_status =
4855 acpi_evalf(ec_handle, NULL, "KBLT", "qv");
4856
4857 vdbg_printk(TPACPI_DBG_INIT, "light is %s, light status is %s\n",
4858 str_supported(tp_features.light),
4859 str_supported(tp_features.light_status));
4860
4861 if (!tp_features.light)
4862 return 1;
4863
4864 rc = led_classdev_register(&tpacpi_pdev->dev,
4865 &tpacpi_led_thinklight.led_classdev);
4866
4867 if (rc < 0) {
4868 tp_features.light = 0;
4869 tp_features.light_status = 0;
4870 } else {
4871 rc = 0;
4872 }
4873
4874 return rc;
4875 }
4876
4877 static void light_exit(void)
4878 {
4879 led_classdev_unregister(&tpacpi_led_thinklight.led_classdev);
4880 flush_workqueue(tpacpi_wq);
4881 }
4882
4883 static int light_read(struct seq_file *m)
4884 {
4885 int status;
4886
4887 if (!tp_features.light) {
4888 seq_printf(m, "status:\t\tnot supported\n");
4889 } else if (!tp_features.light_status) {
4890 seq_printf(m, "status:\t\tunknown\n");
4891 seq_printf(m, "commands:\ton, off\n");
4892 } else {
4893 status = light_get_status();
4894 if (status < 0)
4895 return status;
4896 seq_printf(m, "status:\t\t%s\n", onoff(status, 0));
4897 seq_printf(m, "commands:\ton, off\n");
4898 }
4899
4900 return 0;
4901 }
4902
4903 static int light_write(char *buf)
4904 {
4905 char *cmd;
4906 int newstatus = 0;
4907
4908 if (!tp_features.light)
4909 return -ENODEV;
4910
4911 while ((cmd = next_cmd(&buf))) {
4912 if (strlencmp(cmd, "on") == 0) {
4913 newstatus = 1;
4914 } else if (strlencmp(cmd, "off") == 0) {
4915 newstatus = 0;
4916 } else
4917 return -EINVAL;
4918 }
4919
4920 return light_set_status(newstatus);
4921 }
4922
4923 static struct ibm_struct light_driver_data = {
4924 .name = "light",
4925 .read = light_read,
4926 .write = light_write,
4927 .exit = light_exit,
4928 };
4929
4930 /*************************************************************************
4931 * CMOS subdriver
4932 */
4933
4934 /* sysfs cmos_command -------------------------------------------------- */
4935 static ssize_t cmos_command_store(struct device *dev,
4936 struct device_attribute *attr,
4937 const char *buf, size_t count)
4938 {
4939 unsigned long cmos_cmd;
4940 int res;
4941
4942 if (parse_strtoul(buf, 21, &cmos_cmd))
4943 return -EINVAL;
4944
4945 res = issue_thinkpad_cmos_command(cmos_cmd);
4946 return (res)? res : count;
4947 }
4948
4949 static struct device_attribute dev_attr_cmos_command =
4950 __ATTR(cmos_command, S_IWUSR, NULL, cmos_command_store);
4951
4952 /* --------------------------------------------------------------------- */
4953
4954 static int __init cmos_init(struct ibm_init_struct *iibm)
4955 {
4956 int res;
4957
4958 vdbg_printk(TPACPI_DBG_INIT,
4959 "initializing cmos commands subdriver\n");
4960
4961 TPACPI_ACPIHANDLE_INIT(cmos);
4962
4963 vdbg_printk(TPACPI_DBG_INIT, "cmos commands are %s\n",
4964 str_supported(cmos_handle != NULL));
4965
4966 res = device_create_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
4967 if (res)
4968 return res;
4969
4970 return (cmos_handle)? 0 : 1;
4971 }
4972
4973 static void cmos_exit(void)
4974 {
4975 device_remove_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
4976 }
4977
4978 static int cmos_read(struct seq_file *m)
4979 {
4980 /* cmos not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
4981 R30, R31, T20-22, X20-21 */
4982 if (!cmos_handle)
4983 seq_printf(m, "status:\t\tnot supported\n");
4984 else {
4985 seq_printf(m, "status:\t\tsupported\n");
4986 seq_printf(m, "commands:\t<cmd> (<cmd> is 0-21)\n");
4987 }
4988
4989 return 0;
4990 }
4991
4992 static int cmos_write(char *buf)
4993 {
4994 char *cmd;
4995 int cmos_cmd, res;
4996
4997 while ((cmd = next_cmd(&buf))) {
4998 if (sscanf(cmd, "%u", &cmos_cmd) == 1 &&
4999 cmos_cmd >= 0 && cmos_cmd <= 21) {
5000 /* cmos_cmd set */
5001 } else
5002 return -EINVAL;
5003
5004 res = issue_thinkpad_cmos_command(cmos_cmd);
5005 if (res)
5006 return res;
5007 }
5008
5009 return 0;
5010 }
5011
5012 static struct ibm_struct cmos_driver_data = {
5013 .name = "cmos",
5014 .read = cmos_read,
5015 .write = cmos_write,
5016 .exit = cmos_exit,
5017 };
5018
5019 /*************************************************************************
5020 * LED subdriver
5021 */
5022
5023 enum led_access_mode {
5024 TPACPI_LED_NONE = 0,
5025 TPACPI_LED_570, /* 570 */
5026 TPACPI_LED_OLD, /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
5027 TPACPI_LED_NEW, /* all others */
5028 };
5029
5030 enum { /* For TPACPI_LED_OLD */
5031 TPACPI_LED_EC_HLCL = 0x0c, /* EC reg to get led to power on */
5032 TPACPI_LED_EC_HLBL = 0x0d, /* EC reg to blink a lit led */
5033 TPACPI_LED_EC_HLMS = 0x0e, /* EC reg to select led to command */
5034 };
5035
5036 static enum led_access_mode led_supported;
5037
5038 static acpi_handle led_handle;
5039
5040 #define TPACPI_LED_NUMLEDS 16
5041 static struct tpacpi_led_classdev *tpacpi_leds;
5042 static enum led_status_t tpacpi_led_state_cache[TPACPI_LED_NUMLEDS];
5043 static const char * const tpacpi_led_names[TPACPI_LED_NUMLEDS] = {
5044 /* there's a limit of 19 chars + NULL before 2.6.26 */
5045 "tpacpi::power",
5046 "tpacpi:orange:batt",
5047 "tpacpi:green:batt",
5048 "tpacpi::dock_active",
5049 "tpacpi::bay_active",
5050 "tpacpi::dock_batt",
5051 "tpacpi::unknown_led",
5052 "tpacpi::standby",
5053 "tpacpi::dock_status1",
5054 "tpacpi::dock_status2",
5055 "tpacpi::unknown_led2",
5056 "tpacpi::unknown_led3",
5057 "tpacpi::thinkvantage",
5058 };
5059 #define TPACPI_SAFE_LEDS 0x1081U
5060
5061 static inline bool tpacpi_is_led_restricted(const unsigned int led)
5062 {
5063 #ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS
5064 return false;
5065 #else
5066 return (1U & (TPACPI_SAFE_LEDS >> led)) == 0;
5067 #endif
5068 }
5069
5070 static int led_get_status(const unsigned int led)
5071 {
5072 int status;
5073 enum led_status_t led_s;
5074
5075 switch (led_supported) {
5076 case TPACPI_LED_570:
5077 if (!acpi_evalf(ec_handle,
5078 &status, "GLED", "dd", 1 << led))
5079 return -EIO;
5080 led_s = (status == 0)?
5081 TPACPI_LED_OFF :
5082 ((status == 1)?
5083 TPACPI_LED_ON :
5084 TPACPI_LED_BLINK);
5085 tpacpi_led_state_cache[led] = led_s;
5086 return led_s;
5087 default:
5088 return -ENXIO;
5089 }
5090
5091 /* not reached */
5092 }
5093
5094 static int led_set_status(const unsigned int led,
5095 const enum led_status_t ledstatus)
5096 {
5097 /* off, on, blink. Index is led_status_t */
5098 static const unsigned int led_sled_arg1[] = { 0, 1, 3 };
5099 static const unsigned int led_led_arg1[] = { 0, 0x80, 0xc0 };
5100
5101 int rc = 0;
5102
5103 switch (led_supported) {
5104 case TPACPI_LED_570:
5105 /* 570 */
5106 if (unlikely(led > 7))
5107 return -EINVAL;
5108 if (unlikely(tpacpi_is_led_restricted(led)))
5109 return -EPERM;
5110 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
5111 (1 << led), led_sled_arg1[ledstatus]))
5112 rc = -EIO;
5113 break;
5114 case TPACPI_LED_OLD:
5115 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */
5116 if (unlikely(led > 7))
5117 return -EINVAL;
5118 if (unlikely(tpacpi_is_led_restricted(led)))
5119 return -EPERM;
5120 rc = ec_write(TPACPI_LED_EC_HLMS, (1 << led));
5121 if (rc >= 0)
5122 rc = ec_write(TPACPI_LED_EC_HLBL,
5123 (ledstatus == TPACPI_LED_BLINK) << led);
5124 if (rc >= 0)
5125 rc = ec_write(TPACPI_LED_EC_HLCL,
5126 (ledstatus != TPACPI_LED_OFF) << led);
5127 break;
5128 case TPACPI_LED_NEW:
5129 /* all others */
5130 if (unlikely(led >= TPACPI_LED_NUMLEDS))
5131 return -EINVAL;
5132 if (unlikely(tpacpi_is_led_restricted(led)))
5133 return -EPERM;
5134 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
5135 led, led_led_arg1[ledstatus]))
5136 rc = -EIO;
5137 break;
5138 default:
5139 rc = -ENXIO;
5140 }
5141
5142 if (!rc)
5143 tpacpi_led_state_cache[led] = ledstatus;
5144
5145 return rc;
5146 }
5147
5148 static void led_set_status_worker(struct work_struct *work)
5149 {
5150 struct tpacpi_led_classdev *data =
5151 container_of(work, struct tpacpi_led_classdev, work);
5152
5153 if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING))
5154 led_set_status(data->led, data->new_state);
5155 }
5156
5157 static void led_sysfs_set(struct led_classdev *led_cdev,
5158 enum led_brightness brightness)
5159 {
5160 struct tpacpi_led_classdev *data = container_of(led_cdev,
5161 struct tpacpi_led_classdev, led_classdev);
5162
5163 if (brightness == LED_OFF)
5164 data->new_state = TPACPI_LED_OFF;
5165 else if (tpacpi_led_state_cache[data->led] != TPACPI_LED_BLINK)
5166 data->new_state = TPACPI_LED_ON;
5167 else
5168 data->new_state = TPACPI_LED_BLINK;
5169
5170 queue_work(tpacpi_wq, &data->work);
5171 }
5172
5173 static int led_sysfs_blink_set(struct led_classdev *led_cdev,
5174 unsigned long *delay_on, unsigned long *delay_off)
5175 {
5176 struct tpacpi_led_classdev *data = container_of(led_cdev,
5177 struct tpacpi_led_classdev, led_classdev);
5178
5179 /* Can we choose the flash rate? */
5180 if (*delay_on == 0 && *delay_off == 0) {
5181 /* yes. set them to the hardware blink rate (1 Hz) */
5182 *delay_on = 500; /* ms */
5183 *delay_off = 500; /* ms */
5184 } else if ((*delay_on != 500) || (*delay_off != 500))
5185 return -EINVAL;
5186
5187 data->new_state = TPACPI_LED_BLINK;
5188 queue_work(tpacpi_wq, &data->work);
5189
5190 return 0;
5191 }
5192
5193 static enum led_brightness led_sysfs_get(struct led_classdev *led_cdev)
5194 {
5195 int rc;
5196
5197 struct tpacpi_led_classdev *data = container_of(led_cdev,
5198 struct tpacpi_led_classdev, led_classdev);
5199
5200 rc = led_get_status(data->led);
5201
5202 if (rc == TPACPI_LED_OFF || rc < 0)
5203 rc = LED_OFF; /* no error handling in led class :( */
5204 else
5205 rc = LED_FULL;
5206
5207 return rc;
5208 }
5209
5210 static void led_exit(void)
5211 {
5212 unsigned int i;
5213
5214 for (i = 0; i < TPACPI_LED_NUMLEDS; i++) {
5215 if (tpacpi_leds[i].led_classdev.name)
5216 led_classdev_unregister(&tpacpi_leds[i].led_classdev);
5217 }
5218
5219 flush_workqueue(tpacpi_wq);
5220 kfree(tpacpi_leds);
5221 }
5222
5223 static int __init tpacpi_init_led(unsigned int led)
5224 {
5225 int rc;
5226
5227 tpacpi_leds[led].led = led;
5228
5229 /* LEDs with no name don't get registered */
5230 if (!tpacpi_led_names[led])
5231 return 0;
5232
5233 tpacpi_leds[led].led_classdev.brightness_set = &led_sysfs_set;
5234 tpacpi_leds[led].led_classdev.blink_set = &led_sysfs_blink_set;
5235 if (led_supported == TPACPI_LED_570)
5236 tpacpi_leds[led].led_classdev.brightness_get =
5237 &led_sysfs_get;
5238
5239 tpacpi_leds[led].led_classdev.name = tpacpi_led_names[led];
5240
5241 INIT_WORK(&tpacpi_leds[led].work, led_set_status_worker);
5242
5243 rc = led_classdev_register(&tpacpi_pdev->dev,
5244 &tpacpi_leds[led].led_classdev);
5245 if (rc < 0)
5246 tpacpi_leds[led].led_classdev.name = NULL;
5247
5248 return rc;
5249 }
5250
5251 static const struct tpacpi_quirk led_useful_qtable[] __initconst = {
5252 TPACPI_Q_IBM('1', 'E', 0x009f), /* A30 */
5253 TPACPI_Q_IBM('1', 'N', 0x009f), /* A31 */
5254 TPACPI_Q_IBM('1', 'G', 0x009f), /* A31 */
5255
5256 TPACPI_Q_IBM('1', 'I', 0x0097), /* T30 */
5257 TPACPI_Q_IBM('1', 'R', 0x0097), /* T40, T41, T42, R50, R51 */
5258 TPACPI_Q_IBM('7', '0', 0x0097), /* T43, R52 */
5259 TPACPI_Q_IBM('1', 'Y', 0x0097), /* T43 */
5260 TPACPI_Q_IBM('1', 'W', 0x0097), /* R50e */
5261 TPACPI_Q_IBM('1', 'V', 0x0097), /* R51 */
5262 TPACPI_Q_IBM('7', '8', 0x0097), /* R51e */
5263 TPACPI_Q_IBM('7', '6', 0x0097), /* R52 */
5264
5265 TPACPI_Q_IBM('1', 'K', 0x00bf), /* X30 */
5266 TPACPI_Q_IBM('1', 'Q', 0x00bf), /* X31, X32 */
5267 TPACPI_Q_IBM('1', 'U', 0x00bf), /* X40 */
5268 TPACPI_Q_IBM('7', '4', 0x00bf), /* X41 */
5269 TPACPI_Q_IBM('7', '5', 0x00bf), /* X41t */
5270
5271 TPACPI_Q_IBM('7', '9', 0x1f97), /* T60 (1) */
5272 TPACPI_Q_IBM('7', '7', 0x1f97), /* Z60* (1) */
5273 TPACPI_Q_IBM('7', 'F', 0x1f97), /* Z61* (1) */
5274 TPACPI_Q_IBM('7', 'B', 0x1fb7), /* X60 (1) */
5275
5276 /* (1) - may have excess leds enabled on MSB */
5277
5278 /* Defaults (order matters, keep last, don't reorder!) */
5279 { /* Lenovo */
5280 .vendor = PCI_VENDOR_ID_LENOVO,
5281 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY,
5282 .quirks = 0x1fffU,
5283 },
5284 { /* IBM ThinkPads with no EC version string */
5285 .vendor = PCI_VENDOR_ID_IBM,
5286 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_UNKNOWN,
5287 .quirks = 0x00ffU,
5288 },
5289 { /* IBM ThinkPads with EC version string */
5290 .vendor = PCI_VENDOR_ID_IBM,
5291 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY,
5292 .quirks = 0x00bfU,
5293 },
5294 };
5295
5296 #undef TPACPI_LEDQ_IBM
5297 #undef TPACPI_LEDQ_LNV
5298
5299 static enum led_access_mode __init led_init_detect_mode(void)
5300 {
5301 acpi_status status;
5302
5303 if (tpacpi_is_ibm()) {
5304 /* 570 */
5305 status = acpi_get_handle(ec_handle, "SLED", &led_handle);
5306 if (ACPI_SUCCESS(status))
5307 return TPACPI_LED_570;
5308
5309 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
5310 status = acpi_get_handle(ec_handle, "SYSL", &led_handle);
5311 if (ACPI_SUCCESS(status))
5312 return TPACPI_LED_OLD;
5313 }
5314
5315 /* most others */
5316 status = acpi_get_handle(ec_handle, "LED", &led_handle);
5317 if (ACPI_SUCCESS(status))
5318 return TPACPI_LED_NEW;
5319
5320 /* R30, R31, and unknown firmwares */
5321 led_handle = NULL;
5322 return TPACPI_LED_NONE;
5323 }
5324
5325 static int __init led_init(struct ibm_init_struct *iibm)
5326 {
5327 unsigned int i;
5328 int rc;
5329 unsigned long useful_leds;
5330
5331 vdbg_printk(TPACPI_DBG_INIT, "initializing LED subdriver\n");
5332
5333 led_supported = led_init_detect_mode();
5334
5335 vdbg_printk(TPACPI_DBG_INIT, "LED commands are %s, mode %d\n",
5336 str_supported(led_supported), led_supported);
5337
5338 if (led_supported == TPACPI_LED_NONE)
5339 return 1;
5340
5341 tpacpi_leds = kzalloc(sizeof(*tpacpi_leds) * TPACPI_LED_NUMLEDS,
5342 GFP_KERNEL);
5343 if (!tpacpi_leds) {
5344 pr_err("Out of memory for LED data\n");
5345 return -ENOMEM;
5346 }
5347
5348 useful_leds = tpacpi_check_quirks(led_useful_qtable,
5349 ARRAY_SIZE(led_useful_qtable));
5350
5351 for (i = 0; i < TPACPI_LED_NUMLEDS; i++) {
5352 if (!tpacpi_is_led_restricted(i) &&
5353 test_bit(i, &useful_leds)) {
5354 rc = tpacpi_init_led(i);
5355 if (rc < 0) {
5356 led_exit();
5357 return rc;
5358 }
5359 }
5360 }
5361
5362 #ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS
5363 pr_notice("warning: userspace override of important "
5364 "firmware LEDs is enabled\n");
5365 #endif
5366 return 0;
5367 }
5368
5369 #define str_led_status(s) \
5370 ((s) == TPACPI_LED_OFF ? "off" : \
5371 ((s) == TPACPI_LED_ON ? "on" : "blinking"))
5372
5373 static int led_read(struct seq_file *m)
5374 {
5375 if (!led_supported) {
5376 seq_printf(m, "status:\t\tnot supported\n");
5377 return 0;
5378 }
5379 seq_printf(m, "status:\t\tsupported\n");
5380
5381 if (led_supported == TPACPI_LED_570) {
5382 /* 570 */
5383 int i, status;
5384 for (i = 0; i < 8; i++) {
5385 status = led_get_status(i);
5386 if (status < 0)
5387 return -EIO;
5388 seq_printf(m, "%d:\t\t%s\n",
5389 i, str_led_status(status));
5390 }
5391 }
5392
5393 seq_printf(m, "commands:\t"
5394 "<led> on, <led> off, <led> blink (<led> is 0-15)\n");
5395
5396 return 0;
5397 }
5398
5399 static int led_write(char *buf)
5400 {
5401 char *cmd;
5402 int led, rc;
5403 enum led_status_t s;
5404
5405 if (!led_supported)
5406 return -ENODEV;
5407
5408 while ((cmd = next_cmd(&buf))) {
5409 if (sscanf(cmd, "%d", &led) != 1 || led < 0 || led > 15)
5410 return -EINVAL;
5411
5412 if (strstr(cmd, "off")) {
5413 s = TPACPI_LED_OFF;
5414 } else if (strstr(cmd, "on")) {
5415 s = TPACPI_LED_ON;
5416 } else if (strstr(cmd, "blink")) {
5417 s = TPACPI_LED_BLINK;
5418 } else {
5419 return -EINVAL;
5420 }
5421
5422 rc = led_set_status(led, s);
5423 if (rc < 0)
5424 return rc;
5425 }
5426
5427 return 0;
5428 }
5429
5430 static struct ibm_struct led_driver_data = {
5431 .name = "led",
5432 .read = led_read,
5433 .write = led_write,
5434 .exit = led_exit,
5435 };
5436
5437 /*************************************************************************
5438 * Beep subdriver
5439 */
5440
5441 TPACPI_HANDLE(beep, ec, "BEEP"); /* all except R30, R31 */
5442
5443 #define TPACPI_BEEP_Q1 0x0001
5444
5445 static const struct tpacpi_quirk beep_quirk_table[] __initconst = {
5446 TPACPI_Q_IBM('I', 'M', TPACPI_BEEP_Q1), /* 570 */
5447 TPACPI_Q_IBM('I', 'U', TPACPI_BEEP_Q1), /* 570E - unverified */
5448 };
5449
5450 static int __init beep_init(struct ibm_init_struct *iibm)
5451 {
5452 unsigned long quirks;
5453
5454 vdbg_printk(TPACPI_DBG_INIT, "initializing beep subdriver\n");
5455
5456 TPACPI_ACPIHANDLE_INIT(beep);
5457
5458 vdbg_printk(TPACPI_DBG_INIT, "beep is %s\n",
5459 str_supported(beep_handle != NULL));
5460
5461 quirks = tpacpi_check_quirks(beep_quirk_table,
5462 ARRAY_SIZE(beep_quirk_table));
5463
5464 tp_features.beep_needs_two_args = !!(quirks & TPACPI_BEEP_Q1);
5465
5466 return (beep_handle)? 0 : 1;
5467 }
5468
5469 static int beep_read(struct seq_file *m)
5470 {
5471 if (!beep_handle)
5472 seq_printf(m, "status:\t\tnot supported\n");
5473 else {
5474 seq_printf(m, "status:\t\tsupported\n");
5475 seq_printf(m, "commands:\t<cmd> (<cmd> is 0-17)\n");
5476 }
5477
5478 return 0;
5479 }
5480
5481 static int beep_write(char *buf)
5482 {
5483 char *cmd;
5484 int beep_cmd;
5485
5486 if (!beep_handle)
5487 return -ENODEV;
5488
5489 while ((cmd = next_cmd(&buf))) {
5490 if (sscanf(cmd, "%u", &beep_cmd) == 1 &&
5491 beep_cmd >= 0 && beep_cmd <= 17) {
5492 /* beep_cmd set */
5493 } else
5494 return -EINVAL;
5495 if (tp_features.beep_needs_two_args) {
5496 if (!acpi_evalf(beep_handle, NULL, NULL, "vdd",
5497 beep_cmd, 0))
5498 return -EIO;
5499 } else {
5500 if (!acpi_evalf(beep_handle, NULL, NULL, "vd",
5501 beep_cmd))
5502 return -EIO;
5503 }
5504 }
5505
5506 return 0;
5507 }
5508
5509 static struct ibm_struct beep_driver_data = {
5510 .name = "beep",
5511 .read = beep_read,
5512 .write = beep_write,
5513 };
5514
5515 /*************************************************************************
5516 * Thermal subdriver
5517 */
5518
5519 enum thermal_access_mode {
5520 TPACPI_THERMAL_NONE = 0, /* No thermal support */
5521 TPACPI_THERMAL_ACPI_TMP07, /* Use ACPI TMP0-7 */
5522 TPACPI_THERMAL_ACPI_UPDT, /* Use ACPI TMP0-7 with UPDT */
5523 TPACPI_THERMAL_TPEC_8, /* Use ACPI EC regs, 8 sensors */
5524 TPACPI_THERMAL_TPEC_16, /* Use ACPI EC regs, 16 sensors */
5525 };
5526
5527 enum { /* TPACPI_THERMAL_TPEC_* */
5528 TP_EC_THERMAL_TMP0 = 0x78, /* ACPI EC regs TMP 0..7 */
5529 TP_EC_THERMAL_TMP8 = 0xC0, /* ACPI EC regs TMP 8..15 */
5530 TP_EC_THERMAL_TMP_NA = -128, /* ACPI EC sensor not available */
5531
5532 TPACPI_THERMAL_SENSOR_NA = -128000, /* Sensor not available */
5533 };
5534
5535
5536 #define TPACPI_MAX_THERMAL_SENSORS 16 /* Max thermal sensors supported */
5537 struct ibm_thermal_sensors_struct {
5538 s32 temp[TPACPI_MAX_THERMAL_SENSORS];
5539 };
5540
5541 static enum thermal_access_mode thermal_read_mode;
5542
5543 /* idx is zero-based */
5544 static int thermal_get_sensor(int idx, s32 *value)
5545 {
5546 int t;
5547 s8 tmp;
5548 char tmpi[5];
5549
5550 t = TP_EC_THERMAL_TMP0;
5551
5552 switch (thermal_read_mode) {
5553 #if TPACPI_MAX_THERMAL_SENSORS >= 16
5554 case TPACPI_THERMAL_TPEC_16:
5555 if (idx >= 8 && idx <= 15) {
5556 t = TP_EC_THERMAL_TMP8;
5557 idx -= 8;
5558 }
5559 /* fallthrough */
5560 #endif
5561 case TPACPI_THERMAL_TPEC_8:
5562 if (idx <= 7) {
5563 if (!acpi_ec_read(t + idx, &tmp))
5564 return -EIO;
5565 *value = tmp * 1000;
5566 return 0;
5567 }
5568 break;
5569
5570 case TPACPI_THERMAL_ACPI_UPDT:
5571 if (idx <= 7) {
5572 snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
5573 if (!acpi_evalf(ec_handle, NULL, "UPDT", "v"))
5574 return -EIO;
5575 if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
5576 return -EIO;
5577 *value = (t - 2732) * 100;
5578 return 0;
5579 }
5580 break;
5581
5582 case TPACPI_THERMAL_ACPI_TMP07:
5583 if (idx <= 7) {
5584 snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
5585 if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
5586 return -EIO;
5587 if (t > 127 || t < -127)
5588 t = TP_EC_THERMAL_TMP_NA;
5589 *value = t * 1000;
5590 return 0;
5591 }
5592 break;
5593
5594 case TPACPI_THERMAL_NONE:
5595 default:
5596 return -ENOSYS;
5597 }
5598
5599 return -EINVAL;
5600 }
5601
5602 static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s)
5603 {
5604 int res, i;
5605 int n;
5606
5607 n = 8;
5608 i = 0;
5609
5610 if (!s)
5611 return -EINVAL;
5612
5613 if (thermal_read_mode == TPACPI_THERMAL_TPEC_16)
5614 n = 16;
5615
5616 for (i = 0 ; i < n; i++) {
5617 res = thermal_get_sensor(i, &s->temp[i]);
5618 if (res)
5619 return res;
5620 }
5621
5622 return n;
5623 }
5624
5625 static void thermal_dump_all_sensors(void)
5626 {
5627 int n, i;
5628 struct ibm_thermal_sensors_struct t;
5629
5630 n = thermal_get_sensors(&t);
5631 if (n <= 0)
5632 return;
5633
5634 pr_notice("temperatures (Celsius):");
5635
5636 for (i = 0; i < n; i++) {
5637 if (t.temp[i] != TPACPI_THERMAL_SENSOR_NA)
5638 pr_cont(" %d", (int)(t.temp[i] / 1000));
5639 else
5640 pr_cont(" N/A");
5641 }
5642
5643 pr_cont("\n");
5644 }
5645
5646 /* sysfs temp##_input -------------------------------------------------- */
5647
5648 static ssize_t thermal_temp_input_show(struct device *dev,
5649 struct device_attribute *attr,
5650 char *buf)
5651 {
5652 struct sensor_device_attribute *sensor_attr =
5653 to_sensor_dev_attr(attr);
5654 int idx = sensor_attr->index;
5655 s32 value;
5656 int res;
5657
5658 res = thermal_get_sensor(idx, &value);
5659 if (res)
5660 return res;
5661 if (value == TPACPI_THERMAL_SENSOR_NA)
5662 return -ENXIO;
5663
5664 return snprintf(buf, PAGE_SIZE, "%d\n", value);
5665 }
5666
5667 #define THERMAL_SENSOR_ATTR_TEMP(_idxA, _idxB) \
5668 SENSOR_ATTR(temp##_idxA##_input, S_IRUGO, \
5669 thermal_temp_input_show, NULL, _idxB)
5670
5671 static struct sensor_device_attribute sensor_dev_attr_thermal_temp_input[] = {
5672 THERMAL_SENSOR_ATTR_TEMP(1, 0),
5673 THERMAL_SENSOR_ATTR_TEMP(2, 1),
5674 THERMAL_SENSOR_ATTR_TEMP(3, 2),
5675 THERMAL_SENSOR_ATTR_TEMP(4, 3),
5676 THERMAL_SENSOR_ATTR_TEMP(5, 4),
5677 THERMAL_SENSOR_ATTR_TEMP(6, 5),
5678 THERMAL_SENSOR_ATTR_TEMP(7, 6),
5679 THERMAL_SENSOR_ATTR_TEMP(8, 7),
5680 THERMAL_SENSOR_ATTR_TEMP(9, 8),
5681 THERMAL_SENSOR_ATTR_TEMP(10, 9),
5682 THERMAL_SENSOR_ATTR_TEMP(11, 10),
5683 THERMAL_SENSOR_ATTR_TEMP(12, 11),
5684 THERMAL_SENSOR_ATTR_TEMP(13, 12),
5685 THERMAL_SENSOR_ATTR_TEMP(14, 13),
5686 THERMAL_SENSOR_ATTR_TEMP(15, 14),
5687 THERMAL_SENSOR_ATTR_TEMP(16, 15),
5688 };
5689
5690 #define THERMAL_ATTRS(X) \
5691 &sensor_dev_attr_thermal_temp_input[X].dev_attr.attr
5692
5693 static struct attribute *thermal_temp_input_attr[] = {
5694 THERMAL_ATTRS(8),
5695 THERMAL_ATTRS(9),
5696 THERMAL_ATTRS(10),
5697 THERMAL_ATTRS(11),
5698 THERMAL_ATTRS(12),
5699 THERMAL_ATTRS(13),
5700 THERMAL_ATTRS(14),
5701 THERMAL_ATTRS(15),
5702 THERMAL_ATTRS(0),
5703 THERMAL_ATTRS(1),
5704 THERMAL_ATTRS(2),
5705 THERMAL_ATTRS(3),
5706 THERMAL_ATTRS(4),
5707 THERMAL_ATTRS(5),
5708 THERMAL_ATTRS(6),
5709 THERMAL_ATTRS(7),
5710 NULL
5711 };
5712
5713 static const struct attribute_group thermal_temp_input16_group = {
5714 .attrs = thermal_temp_input_attr
5715 };
5716
5717 static const struct attribute_group thermal_temp_input8_group = {
5718 .attrs = &thermal_temp_input_attr[8]
5719 };
5720
5721 #undef THERMAL_SENSOR_ATTR_TEMP
5722 #undef THERMAL_ATTRS
5723
5724 /* --------------------------------------------------------------------- */
5725
5726 static int __init thermal_init(struct ibm_init_struct *iibm)
5727 {
5728 u8 t, ta1, ta2;
5729 int i;
5730 int acpi_tmp7;
5731 int res;
5732
5733 vdbg_printk(TPACPI_DBG_INIT, "initializing thermal subdriver\n");
5734
5735 acpi_tmp7 = acpi_evalf(ec_handle, NULL, "TMP7", "qv");
5736
5737 if (thinkpad_id.ec_model) {
5738 /*
5739 * Direct EC access mode: sensors at registers
5740 * 0x78-0x7F, 0xC0-0xC7. Registers return 0x00 for
5741 * non-implemented, thermal sensors return 0x80 when
5742 * not available
5743 */
5744
5745 ta1 = ta2 = 0;
5746 for (i = 0; i < 8; i++) {
5747 if (acpi_ec_read(TP_EC_THERMAL_TMP0 + i, &t)) {
5748 ta1 |= t;
5749 } else {
5750 ta1 = 0;
5751 break;
5752 }
5753 if (acpi_ec_read(TP_EC_THERMAL_TMP8 + i, &t)) {
5754 ta2 |= t;
5755 } else {
5756 ta1 = 0;
5757 break;
5758 }
5759 }
5760 if (ta1 == 0) {
5761 /* This is sheer paranoia, but we handle it anyway */
5762 if (acpi_tmp7) {
5763 pr_err("ThinkPad ACPI EC access misbehaving, "
5764 "falling back to ACPI TMPx access "
5765 "mode\n");
5766 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
5767 } else {
5768 pr_err("ThinkPad ACPI EC access misbehaving, "
5769 "disabling thermal sensors access\n");
5770 thermal_read_mode = TPACPI_THERMAL_NONE;
5771 }
5772 } else {
5773 thermal_read_mode =
5774 (ta2 != 0) ?
5775 TPACPI_THERMAL_TPEC_16 : TPACPI_THERMAL_TPEC_8;
5776 }
5777 } else if (acpi_tmp7) {
5778 if (tpacpi_is_ibm() &&
5779 acpi_evalf(ec_handle, NULL, "UPDT", "qv")) {
5780 /* 600e/x, 770e, 770x */
5781 thermal_read_mode = TPACPI_THERMAL_ACPI_UPDT;
5782 } else {
5783 /* IBM/LENOVO DSDT EC.TMPx access, max 8 sensors */
5784 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
5785 }
5786 } else {
5787 /* temperatures not supported on 570, G4x, R30, R31, R32 */
5788 thermal_read_mode = TPACPI_THERMAL_NONE;
5789 }
5790
5791 vdbg_printk(TPACPI_DBG_INIT, "thermal is %s, mode %d\n",
5792 str_supported(thermal_read_mode != TPACPI_THERMAL_NONE),
5793 thermal_read_mode);
5794
5795 switch (thermal_read_mode) {
5796 case TPACPI_THERMAL_TPEC_16:
5797 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
5798 &thermal_temp_input16_group);
5799 if (res)
5800 return res;
5801 break;
5802 case TPACPI_THERMAL_TPEC_8:
5803 case TPACPI_THERMAL_ACPI_TMP07:
5804 case TPACPI_THERMAL_ACPI_UPDT:
5805 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
5806 &thermal_temp_input8_group);
5807 if (res)
5808 return res;
5809 break;
5810 case TPACPI_THERMAL_NONE:
5811 default:
5812 return 1;
5813 }
5814
5815 return 0;
5816 }
5817
5818 static void thermal_exit(void)
5819 {
5820 switch (thermal_read_mode) {
5821 case TPACPI_THERMAL_TPEC_16:
5822 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
5823 &thermal_temp_input16_group);
5824 break;
5825 case TPACPI_THERMAL_TPEC_8:
5826 case TPACPI_THERMAL_ACPI_TMP07:
5827 case TPACPI_THERMAL_ACPI_UPDT:
5828 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
5829 &thermal_temp_input8_group);
5830 break;
5831 case TPACPI_THERMAL_NONE:
5832 default:
5833 break;
5834 }
5835 }
5836
5837 static int thermal_read(struct seq_file *m)
5838 {
5839 int n, i;
5840 struct ibm_thermal_sensors_struct t;
5841
5842 n = thermal_get_sensors(&t);
5843 if (unlikely(n < 0))
5844 return n;
5845
5846 seq_printf(m, "temperatures:\t");
5847
5848 if (n > 0) {
5849 for (i = 0; i < (n - 1); i++)
5850 seq_printf(m, "%d ", t.temp[i] / 1000);
5851 seq_printf(m, "%d\n", t.temp[i] / 1000);
5852 } else
5853 seq_printf(m, "not supported\n");
5854
5855 return 0;
5856 }
5857
5858 static struct ibm_struct thermal_driver_data = {
5859 .name = "thermal",
5860 .read = thermal_read,
5861 .exit = thermal_exit,
5862 };
5863
5864 /*************************************************************************
5865 * Backlight/brightness subdriver
5866 */
5867
5868 #define TPACPI_BACKLIGHT_DEV_NAME "thinkpad_screen"
5869
5870 /*
5871 * ThinkPads can read brightness from two places: EC HBRV (0x31), or
5872 * CMOS NVRAM byte 0x5E, bits 0-3.
5873 *
5874 * EC HBRV (0x31) has the following layout
5875 * Bit 7: unknown function
5876 * Bit 6: unknown function
5877 * Bit 5: Z: honour scale changes, NZ: ignore scale changes
5878 * Bit 4: must be set to zero to avoid problems
5879 * Bit 3-0: backlight brightness level
5880 *
5881 * brightness_get_raw returns status data in the HBRV layout
5882 *
5883 * WARNING: The X61 has been verified to use HBRV for something else, so
5884 * this should be used _only_ on IBM ThinkPads, and maybe with some careful
5885 * testing on the very early *60 Lenovo models...
5886 */
5887
5888 enum {
5889 TP_EC_BACKLIGHT = 0x31,
5890
5891 /* TP_EC_BACKLIGHT bitmasks */
5892 TP_EC_BACKLIGHT_LVLMSK = 0x1F,
5893 TP_EC_BACKLIGHT_CMDMSK = 0xE0,
5894 TP_EC_BACKLIGHT_MAPSW = 0x20,
5895 };
5896
5897 enum tpacpi_brightness_access_mode {
5898 TPACPI_BRGHT_MODE_AUTO = 0, /* Not implemented yet */
5899 TPACPI_BRGHT_MODE_EC, /* EC control */
5900 TPACPI_BRGHT_MODE_UCMS_STEP, /* UCMS step-based control */
5901 TPACPI_BRGHT_MODE_ECNVRAM, /* EC control w/ NVRAM store */
5902 TPACPI_BRGHT_MODE_MAX
5903 };
5904
5905 static struct backlight_device *ibm_backlight_device;
5906
5907 static enum tpacpi_brightness_access_mode brightness_mode =
5908 TPACPI_BRGHT_MODE_MAX;
5909
5910 static unsigned int brightness_enable = 2; /* 2 = auto, 0 = no, 1 = yes */
5911
5912 static struct mutex brightness_mutex;
5913
5914 /* NVRAM brightness access,
5915 * call with brightness_mutex held! */
5916 static unsigned int tpacpi_brightness_nvram_get(void)
5917 {
5918 u8 lnvram;
5919
5920 lnvram = (nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS)
5921 & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
5922 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
5923 lnvram &= bright_maxlvl;
5924
5925 return lnvram;
5926 }
5927
5928 static void tpacpi_brightness_checkpoint_nvram(void)
5929 {
5930 u8 lec = 0;
5931 u8 b_nvram;
5932
5933 if (brightness_mode != TPACPI_BRGHT_MODE_ECNVRAM)
5934 return;
5935
5936 vdbg_printk(TPACPI_DBG_BRGHT,
5937 "trying to checkpoint backlight level to NVRAM...\n");
5938
5939 if (mutex_lock_killable(&brightness_mutex) < 0)
5940 return;
5941
5942 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
5943 goto unlock;
5944 lec &= TP_EC_BACKLIGHT_LVLMSK;
5945 b_nvram = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS);
5946
5947 if (lec != ((b_nvram & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
5948 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS)) {
5949 /* NVRAM needs update */
5950 b_nvram &= ~(TP_NVRAM_MASK_LEVEL_BRIGHTNESS <<
5951 TP_NVRAM_POS_LEVEL_BRIGHTNESS);
5952 b_nvram |= lec;
5953 nvram_write_byte(b_nvram, TP_NVRAM_ADDR_BRIGHTNESS);
5954 dbg_printk(TPACPI_DBG_BRGHT,
5955 "updated NVRAM backlight level to %u (0x%02x)\n",
5956 (unsigned int) lec, (unsigned int) b_nvram);
5957 } else
5958 vdbg_printk(TPACPI_DBG_BRGHT,
5959 "NVRAM backlight level already is %u (0x%02x)\n",
5960 (unsigned int) lec, (unsigned int) b_nvram);
5961
5962 unlock:
5963 mutex_unlock(&brightness_mutex);
5964 }
5965
5966
5967 /* call with brightness_mutex held! */
5968 static int tpacpi_brightness_get_raw(int *status)
5969 {
5970 u8 lec = 0;
5971
5972 switch (brightness_mode) {
5973 case TPACPI_BRGHT_MODE_UCMS_STEP:
5974 *status = tpacpi_brightness_nvram_get();
5975 return 0;
5976 case TPACPI_BRGHT_MODE_EC:
5977 case TPACPI_BRGHT_MODE_ECNVRAM:
5978 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
5979 return -EIO;
5980 *status = lec;
5981 return 0;
5982 default:
5983 return -ENXIO;
5984 }
5985 }
5986
5987 /* call with brightness_mutex held! */
5988 /* do NOT call with illegal backlight level value */
5989 static int tpacpi_brightness_set_ec(unsigned int value)
5990 {
5991 u8 lec = 0;
5992
5993 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
5994 return -EIO;
5995
5996 if (unlikely(!acpi_ec_write(TP_EC_BACKLIGHT,
5997 (lec & TP_EC_BACKLIGHT_CMDMSK) |
5998 (value & TP_EC_BACKLIGHT_LVLMSK))))
5999 return -EIO;
6000
6001 return 0;
6002 }
6003
6004 /* call with brightness_mutex held! */
6005 static int tpacpi_brightness_set_ucmsstep(unsigned int value)
6006 {
6007 int cmos_cmd, inc;
6008 unsigned int current_value, i;
6009
6010 current_value = tpacpi_brightness_nvram_get();
6011
6012 if (value == current_value)
6013 return 0;
6014
6015 cmos_cmd = (value > current_value) ?
6016 TP_CMOS_BRIGHTNESS_UP :
6017 TP_CMOS_BRIGHTNESS_DOWN;
6018 inc = (value > current_value) ? 1 : -1;
6019
6020 for (i = current_value; i != value; i += inc)
6021 if (issue_thinkpad_cmos_command(cmos_cmd))
6022 return -EIO;
6023
6024 return 0;
6025 }
6026
6027 /* May return EINTR which can always be mapped to ERESTARTSYS */
6028 static int brightness_set(unsigned int value)
6029 {
6030 int res;
6031
6032 if (value > bright_maxlvl || value < 0)
6033 return -EINVAL;
6034
6035 vdbg_printk(TPACPI_DBG_BRGHT,
6036 "set backlight level to %d\n", value);
6037
6038 res = mutex_lock_killable(&brightness_mutex);
6039 if (res < 0)
6040 return res;
6041
6042 switch (brightness_mode) {
6043 case TPACPI_BRGHT_MODE_EC:
6044 case TPACPI_BRGHT_MODE_ECNVRAM:
6045 res = tpacpi_brightness_set_ec(value);
6046 break;
6047 case TPACPI_BRGHT_MODE_UCMS_STEP:
6048 res = tpacpi_brightness_set_ucmsstep(value);
6049 break;
6050 default:
6051 res = -ENXIO;
6052 }
6053
6054 mutex_unlock(&brightness_mutex);
6055 return res;
6056 }
6057
6058 /* sysfs backlight class ----------------------------------------------- */
6059
6060 static int brightness_update_status(struct backlight_device *bd)
6061 {
6062 unsigned int level =
6063 (bd->props.fb_blank == FB_BLANK_UNBLANK &&
6064 bd->props.power == FB_BLANK_UNBLANK) ?
6065 bd->props.brightness : 0;
6066
6067 dbg_printk(TPACPI_DBG_BRGHT,
6068 "backlight: attempt to set level to %d\n",
6069 level);
6070
6071 /* it is the backlight class's job (caller) to handle
6072 * EINTR and other errors properly */
6073 return brightness_set(level);
6074 }
6075
6076 static int brightness_get(struct backlight_device *bd)
6077 {
6078 int status, res;
6079
6080 res = mutex_lock_killable(&brightness_mutex);
6081 if (res < 0)
6082 return 0;
6083
6084 res = tpacpi_brightness_get_raw(&status);
6085
6086 mutex_unlock(&brightness_mutex);
6087
6088 if (res < 0)
6089 return 0;
6090
6091 return status & TP_EC_BACKLIGHT_LVLMSK;
6092 }
6093
6094 static void tpacpi_brightness_notify_change(void)
6095 {
6096 backlight_force_update(ibm_backlight_device,
6097 BACKLIGHT_UPDATE_HOTKEY);
6098 }
6099
6100 static const struct backlight_ops ibm_backlight_data = {
6101 .get_brightness = brightness_get,
6102 .update_status = brightness_update_status,
6103 };
6104
6105 /* --------------------------------------------------------------------- */
6106
6107 /*
6108 * Call _BCL method of video device. On some ThinkPads this will
6109 * switch the firmware to the ACPI brightness control mode.
6110 */
6111
6112 static int __init tpacpi_query_bcl_levels(acpi_handle handle)
6113 {
6114 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
6115 union acpi_object *obj;
6116 int rc;
6117
6118 if (ACPI_SUCCESS(acpi_evaluate_object(handle, "_BCL", NULL, &buffer))) {
6119 obj = (union acpi_object *)buffer.pointer;
6120 if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) {
6121 pr_err("Unknown _BCL data, please report this to %s\n",
6122 TPACPI_MAIL);
6123 rc = 0;
6124 } else {
6125 rc = obj->package.count;
6126 }
6127 } else {
6128 return 0;
6129 }
6130
6131 kfree(buffer.pointer);
6132 return rc;
6133 }
6134
6135
6136 /*
6137 * Returns 0 (no ACPI _BCL or _BCL invalid), or size of brightness map
6138 */
6139 static unsigned int __init tpacpi_check_std_acpi_brightness_support(void)
6140 {
6141 acpi_handle video_device;
6142 int bcl_levels = 0;
6143
6144 tpacpi_acpi_handle_locate("video", ACPI_VIDEO_HID, &video_device);
6145 if (video_device)
6146 bcl_levels = tpacpi_query_bcl_levels(video_device);
6147
6148 tp_features.bright_acpimode = (bcl_levels > 0);
6149
6150 return (bcl_levels > 2) ? (bcl_levels - 2) : 0;
6151 }
6152
6153 /*
6154 * These are only useful for models that have only one possibility
6155 * of GPU. If the BIOS model handles both ATI and Intel, don't use
6156 * these quirks.
6157 */
6158 #define TPACPI_BRGHT_Q_NOEC 0x0001 /* Must NOT use EC HBRV */
6159 #define TPACPI_BRGHT_Q_EC 0x0002 /* Should or must use EC HBRV */
6160 #define TPACPI_BRGHT_Q_ASK 0x8000 /* Ask for user report */
6161
6162 static const struct tpacpi_quirk brightness_quirk_table[] __initconst = {
6163 /* Models with ATI GPUs known to require ECNVRAM mode */
6164 TPACPI_Q_IBM('1', 'Y', TPACPI_BRGHT_Q_EC), /* T43/p ATI */
6165
6166 /* Models with ATI GPUs that can use ECNVRAM */
6167 TPACPI_Q_IBM('1', 'R', TPACPI_BRGHT_Q_EC), /* R50,51 T40-42 */
6168 TPACPI_Q_IBM('1', 'Q', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
6169 TPACPI_Q_IBM('7', '6', TPACPI_BRGHT_Q_EC), /* R52 */
6170 TPACPI_Q_IBM('7', '8', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
6171
6172 /* Models with Intel Extreme Graphics 2 */
6173 TPACPI_Q_IBM('1', 'U', TPACPI_BRGHT_Q_NOEC), /* X40 */
6174 TPACPI_Q_IBM('1', 'V', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
6175 TPACPI_Q_IBM('1', 'W', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
6176
6177 /* Models with Intel GMA900 */
6178 TPACPI_Q_IBM('7', '0', TPACPI_BRGHT_Q_NOEC), /* T43, R52 */
6179 TPACPI_Q_IBM('7', '4', TPACPI_BRGHT_Q_NOEC), /* X41 */
6180 TPACPI_Q_IBM('7', '5', TPACPI_BRGHT_Q_NOEC), /* X41 Tablet */
6181 };
6182
6183 /*
6184 * Returns < 0 for error, otherwise sets tp_features.bright_*
6185 * and bright_maxlvl.
6186 */
6187 static void __init tpacpi_detect_brightness_capabilities(void)
6188 {
6189 unsigned int b;
6190
6191 vdbg_printk(TPACPI_DBG_INIT,
6192 "detecting firmware brightness interface capabilities\n");
6193
6194 /* we could run a quirks check here (same table used by
6195 * brightness_init) if needed */
6196
6197 /*
6198 * We always attempt to detect acpi support, so as to switch
6199 * Lenovo Vista BIOS to ACPI brightness mode even if we are not
6200 * going to publish a backlight interface
6201 */
6202 b = tpacpi_check_std_acpi_brightness_support();
6203 switch (b) {
6204 case 16:
6205 bright_maxlvl = 15;
6206 pr_info("detected a 16-level brightness capable ThinkPad\n");
6207 break;
6208 case 8:
6209 case 0:
6210 bright_maxlvl = 7;
6211 pr_info("detected a 8-level brightness capable ThinkPad\n");
6212 break;
6213 default:
6214 pr_err("Unsupported brightness interface, "
6215 "please contact %s\n", TPACPI_MAIL);
6216 tp_features.bright_unkfw = 1;
6217 bright_maxlvl = b - 1;
6218 }
6219 }
6220
6221 static int __init brightness_init(struct ibm_init_struct *iibm)
6222 {
6223 struct backlight_properties props;
6224 int b;
6225 unsigned long quirks;
6226
6227 vdbg_printk(TPACPI_DBG_INIT, "initializing brightness subdriver\n");
6228
6229 mutex_init(&brightness_mutex);
6230
6231 quirks = tpacpi_check_quirks(brightness_quirk_table,
6232 ARRAY_SIZE(brightness_quirk_table));
6233
6234 /* tpacpi_detect_brightness_capabilities() must have run already */
6235
6236 /* if it is unknown, we don't handle it: it wouldn't be safe */
6237 if (tp_features.bright_unkfw)
6238 return 1;
6239
6240 if (!brightness_enable) {
6241 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT,
6242 "brightness support disabled by "
6243 "module parameter\n");
6244 return 1;
6245 }
6246
6247 if (acpi_video_backlight_support()) {
6248 if (brightness_enable > 1) {
6249 pr_info("Standard ACPI backlight interface "
6250 "available, not loading native one\n");
6251 return 1;
6252 } else if (brightness_enable == 1) {
6253 pr_warn("Cannot enable backlight brightness support, "
6254 "ACPI is already handling it. Refer to the "
6255 "acpi_backlight kernel parameter.\n");
6256 return 1;
6257 }
6258 } else if (tp_features.bright_acpimode && brightness_enable > 1) {
6259 pr_notice("Standard ACPI backlight interface not "
6260 "available, thinkpad_acpi native "
6261 "brightness control enabled\n");
6262 }
6263
6264 /*
6265 * Check for module parameter bogosity, note that we
6266 * init brightness_mode to TPACPI_BRGHT_MODE_MAX in order to be
6267 * able to detect "unspecified"
6268 */
6269 if (brightness_mode > TPACPI_BRGHT_MODE_MAX)
6270 return -EINVAL;
6271
6272 /* TPACPI_BRGHT_MODE_AUTO not implemented yet, just use default */
6273 if (brightness_mode == TPACPI_BRGHT_MODE_AUTO ||
6274 brightness_mode == TPACPI_BRGHT_MODE_MAX) {
6275 if (quirks & TPACPI_BRGHT_Q_EC)
6276 brightness_mode = TPACPI_BRGHT_MODE_ECNVRAM;
6277 else
6278 brightness_mode = TPACPI_BRGHT_MODE_UCMS_STEP;
6279
6280 dbg_printk(TPACPI_DBG_BRGHT,
6281 "driver auto-selected brightness_mode=%d\n",
6282 brightness_mode);
6283 }
6284
6285 /* Safety */
6286 if (!tpacpi_is_ibm() &&
6287 (brightness_mode == TPACPI_BRGHT_MODE_ECNVRAM ||
6288 brightness_mode == TPACPI_BRGHT_MODE_EC))
6289 return -EINVAL;
6290
6291 if (tpacpi_brightness_get_raw(&b) < 0)
6292 return 1;
6293
6294 memset(&props, 0, sizeof(struct backlight_properties));
6295 props.type = BACKLIGHT_PLATFORM;
6296 props.max_brightness = bright_maxlvl;
6297 props.brightness = b & TP_EC_BACKLIGHT_LVLMSK;
6298 ibm_backlight_device = backlight_device_register(TPACPI_BACKLIGHT_DEV_NAME,
6299 NULL, NULL,
6300 &ibm_backlight_data,
6301 &props);
6302 if (IS_ERR(ibm_backlight_device)) {
6303 int rc = PTR_ERR(ibm_backlight_device);
6304 ibm_backlight_device = NULL;
6305 pr_err("Could not register backlight device\n");
6306 return rc;
6307 }
6308 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT,
6309 "brightness is supported\n");
6310
6311 if (quirks & TPACPI_BRGHT_Q_ASK) {
6312 pr_notice("brightness: will use unverified default: "
6313 "brightness_mode=%d\n", brightness_mode);
6314 pr_notice("brightness: please report to %s whether it works well "
6315 "or not on your ThinkPad\n", TPACPI_MAIL);
6316 }
6317
6318 /* Added by mistake in early 2007. Probably useless, but it could
6319 * be working around some unknown firmware problem where the value
6320 * read at startup doesn't match the real hardware state... so leave
6321 * it in place just in case */
6322 backlight_update_status(ibm_backlight_device);
6323
6324 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT,
6325 "brightness: registering brightness hotkeys "
6326 "as change notification\n");
6327 tpacpi_hotkey_driver_mask_set(hotkey_driver_mask
6328 | TP_ACPI_HKEY_BRGHTUP_MASK
6329 | TP_ACPI_HKEY_BRGHTDWN_MASK);
6330 return 0;
6331 }
6332
6333 static void brightness_suspend(void)
6334 {
6335 tpacpi_brightness_checkpoint_nvram();
6336 }
6337
6338 static void brightness_shutdown(void)
6339 {
6340 tpacpi_brightness_checkpoint_nvram();
6341 }
6342
6343 static void brightness_exit(void)
6344 {
6345 if (ibm_backlight_device) {
6346 vdbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_BRGHT,
6347 "calling backlight_device_unregister()\n");
6348 backlight_device_unregister(ibm_backlight_device);
6349 }
6350
6351 tpacpi_brightness_checkpoint_nvram();
6352 }
6353
6354 static int brightness_read(struct seq_file *m)
6355 {
6356 int level;
6357
6358 level = brightness_get(NULL);
6359 if (level < 0) {
6360 seq_printf(m, "level:\t\tunreadable\n");
6361 } else {
6362 seq_printf(m, "level:\t\t%d\n", level);
6363 seq_printf(m, "commands:\tup, down\n");
6364 seq_printf(m, "commands:\tlevel <level> (<level> is 0-%d)\n",
6365 bright_maxlvl);
6366 }
6367
6368 return 0;
6369 }
6370
6371 static int brightness_write(char *buf)
6372 {
6373 int level;
6374 int rc;
6375 char *cmd;
6376
6377 level = brightness_get(NULL);
6378 if (level < 0)
6379 return level;
6380
6381 while ((cmd = next_cmd(&buf))) {
6382 if (strlencmp(cmd, "up") == 0) {
6383 if (level < bright_maxlvl)
6384 level++;
6385 } else if (strlencmp(cmd, "down") == 0) {
6386 if (level > 0)
6387 level--;
6388 } else if (sscanf(cmd, "level %d", &level) == 1 &&
6389 level >= 0 && level <= bright_maxlvl) {
6390 /* new level set */
6391 } else
6392 return -EINVAL;
6393 }
6394
6395 tpacpi_disclose_usertask("procfs brightness",
6396 "set level to %d\n", level);
6397
6398 /*
6399 * Now we know what the final level should be, so we try to set it.
6400 * Doing it this way makes the syscall restartable in case of EINTR
6401 */
6402 rc = brightness_set(level);
6403 if (!rc && ibm_backlight_device)
6404 backlight_force_update(ibm_backlight_device,
6405 BACKLIGHT_UPDATE_SYSFS);
6406 return (rc == -EINTR)? -ERESTARTSYS : rc;
6407 }
6408
6409 static struct ibm_struct brightness_driver_data = {
6410 .name = "brightness",
6411 .read = brightness_read,
6412 .write = brightness_write,
6413 .exit = brightness_exit,
6414 .suspend = brightness_suspend,
6415 .shutdown = brightness_shutdown,
6416 };
6417
6418 /*************************************************************************
6419 * Volume subdriver
6420 */
6421
6422 /*
6423 * IBM ThinkPads have a simple volume controller with MUTE gating.
6424 * Very early Lenovo ThinkPads follow the IBM ThinkPad spec.
6425 *
6426 * Since the *61 series (and probably also the later *60 series), Lenovo
6427 * ThinkPads only implement the MUTE gate.
6428 *
6429 * EC register 0x30
6430 * Bit 6: MUTE (1 mutes sound)
6431 * Bit 3-0: Volume
6432 * Other bits should be zero as far as we know.
6433 *
6434 * This is also stored in CMOS NVRAM, byte 0x60, bit 6 (MUTE), and
6435 * bits 3-0 (volume). Other bits in NVRAM may have other functions,
6436 * such as bit 7 which is used to detect repeated presses of MUTE,
6437 * and we leave them unchanged.
6438 */
6439
6440 #ifdef CONFIG_THINKPAD_ACPI_ALSA_SUPPORT
6441
6442 #define TPACPI_ALSA_DRVNAME "ThinkPad EC"
6443 #define TPACPI_ALSA_SHRTNAME "ThinkPad Console Audio Control"
6444 #define TPACPI_ALSA_MIXERNAME TPACPI_ALSA_SHRTNAME
6445
6446 static int alsa_index = ~((1 << (SNDRV_CARDS - 3)) - 1); /* last three slots */
6447 static char *alsa_id = "ThinkPadEC";
6448 static bool alsa_enable = SNDRV_DEFAULT_ENABLE1;
6449
6450 struct tpacpi_alsa_data {
6451 struct snd_card *card;
6452 struct snd_ctl_elem_id *ctl_mute_id;
6453 struct snd_ctl_elem_id *ctl_vol_id;
6454 };
6455
6456 static struct snd_card *alsa_card;
6457
6458 enum {
6459 TP_EC_AUDIO = 0x30,
6460
6461 /* TP_EC_AUDIO bits */
6462 TP_EC_AUDIO_MUTESW = 6,
6463
6464 /* TP_EC_AUDIO bitmasks */
6465 TP_EC_AUDIO_LVL_MSK = 0x0F,
6466 TP_EC_AUDIO_MUTESW_MSK = (1 << TP_EC_AUDIO_MUTESW),
6467
6468 /* Maximum volume */
6469 TP_EC_VOLUME_MAX = 14,
6470 };
6471
6472 enum tpacpi_volume_access_mode {
6473 TPACPI_VOL_MODE_AUTO = 0, /* Not implemented yet */
6474 TPACPI_VOL_MODE_EC, /* Pure EC control */
6475 TPACPI_VOL_MODE_UCMS_STEP, /* UCMS step-based control: N/A */
6476 TPACPI_VOL_MODE_ECNVRAM, /* EC control w/ NVRAM store */
6477 TPACPI_VOL_MODE_MAX
6478 };
6479
6480 enum tpacpi_volume_capabilities {
6481 TPACPI_VOL_CAP_AUTO = 0, /* Use white/blacklist */
6482 TPACPI_VOL_CAP_VOLMUTE, /* Output vol and mute */
6483 TPACPI_VOL_CAP_MUTEONLY, /* Output mute only */
6484 TPACPI_VOL_CAP_MAX
6485 };
6486
6487 static enum tpacpi_volume_access_mode volume_mode =
6488 TPACPI_VOL_MODE_MAX;
6489
6490 static enum tpacpi_volume_capabilities volume_capabilities;
6491 static bool volume_control_allowed;
6492
6493 /*
6494 * Used to syncronize writers to TP_EC_AUDIO and
6495 * TP_NVRAM_ADDR_MIXER, as we need to do read-modify-write
6496 */
6497 static struct mutex volume_mutex;
6498
6499 static void tpacpi_volume_checkpoint_nvram(void)
6500 {
6501 u8 lec = 0;
6502 u8 b_nvram;
6503 u8 ec_mask;
6504
6505 if (volume_mode != TPACPI_VOL_MODE_ECNVRAM)
6506 return;
6507 if (!volume_control_allowed)
6508 return;
6509
6510 vdbg_printk(TPACPI_DBG_MIXER,
6511 "trying to checkpoint mixer state to NVRAM...\n");
6512
6513 if (tp_features.mixer_no_level_control)
6514 ec_mask = TP_EC_AUDIO_MUTESW_MSK;
6515 else
6516 ec_mask = TP_EC_AUDIO_MUTESW_MSK | TP_EC_AUDIO_LVL_MSK;
6517
6518 if (mutex_lock_killable(&volume_mutex) < 0)
6519 return;
6520
6521 if (unlikely(!acpi_ec_read(TP_EC_AUDIO, &lec)))
6522 goto unlock;
6523 lec &= ec_mask;
6524 b_nvram = nvram_read_byte(TP_NVRAM_ADDR_MIXER);
6525
6526 if (lec != (b_nvram & ec_mask)) {
6527 /* NVRAM needs update */
6528 b_nvram &= ~ec_mask;
6529 b_nvram |= lec;
6530 nvram_write_byte(b_nvram, TP_NVRAM_ADDR_MIXER);
6531 dbg_printk(TPACPI_DBG_MIXER,
6532 "updated NVRAM mixer status to 0x%02x (0x%02x)\n",
6533 (unsigned int) lec, (unsigned int) b_nvram);
6534 } else {
6535 vdbg_printk(TPACPI_DBG_MIXER,
6536 "NVRAM mixer status already is 0x%02x (0x%02x)\n",
6537 (unsigned int) lec, (unsigned int) b_nvram);
6538 }
6539
6540 unlock:
6541 mutex_unlock(&volume_mutex);
6542 }
6543
6544 static int volume_get_status_ec(u8 *status)
6545 {
6546 u8 s;
6547
6548 if (!acpi_ec_read(TP_EC_AUDIO, &s))
6549 return -EIO;
6550
6551 *status = s;
6552
6553 dbg_printk(TPACPI_DBG_MIXER, "status 0x%02x\n", s);
6554
6555 return 0;
6556 }
6557
6558 static int volume_get_status(u8 *status)
6559 {
6560 return volume_get_status_ec(status);
6561 }
6562
6563 static int volume_set_status_ec(const u8 status)
6564 {
6565 if (!acpi_ec_write(TP_EC_AUDIO, status))
6566 return -EIO;
6567
6568 dbg_printk(TPACPI_DBG_MIXER, "set EC mixer to 0x%02x\n", status);
6569
6570 return 0;
6571 }
6572
6573 static int volume_set_status(const u8 status)
6574 {
6575 return volume_set_status_ec(status);
6576 }
6577
6578 /* returns < 0 on error, 0 on no change, 1 on change */
6579 static int __volume_set_mute_ec(const bool mute)
6580 {
6581 int rc;
6582 u8 s, n;
6583
6584 if (mutex_lock_killable(&volume_mutex) < 0)
6585 return -EINTR;
6586
6587 rc = volume_get_status_ec(&s);
6588 if (rc)
6589 goto unlock;
6590
6591 n = (mute) ? s | TP_EC_AUDIO_MUTESW_MSK :
6592 s & ~TP_EC_AUDIO_MUTESW_MSK;
6593
6594 if (n != s) {
6595 rc = volume_set_status_ec(n);
6596 if (!rc)
6597 rc = 1;
6598 }
6599
6600 unlock:
6601 mutex_unlock(&volume_mutex);
6602 return rc;
6603 }
6604
6605 static int volume_alsa_set_mute(const bool mute)
6606 {
6607 dbg_printk(TPACPI_DBG_MIXER, "ALSA: trying to %smute\n",
6608 (mute) ? "" : "un");
6609 return __volume_set_mute_ec(mute);
6610 }
6611
6612 static int volume_set_mute(const bool mute)
6613 {
6614 int rc;
6615
6616 dbg_printk(TPACPI_DBG_MIXER, "trying to %smute\n",
6617 (mute) ? "" : "un");
6618
6619 rc = __volume_set_mute_ec(mute);
6620 return (rc < 0) ? rc : 0;
6621 }
6622
6623 /* returns < 0 on error, 0 on no change, 1 on change */
6624 static int __volume_set_volume_ec(const u8 vol)
6625 {
6626 int rc;
6627 u8 s, n;
6628
6629 if (vol > TP_EC_VOLUME_MAX)
6630 return -EINVAL;
6631
6632 if (mutex_lock_killable(&volume_mutex) < 0)
6633 return -EINTR;
6634
6635 rc = volume_get_status_ec(&s);
6636 if (rc)
6637 goto unlock;
6638
6639 n = (s & ~TP_EC_AUDIO_LVL_MSK) | vol;
6640
6641 if (n != s) {
6642 rc = volume_set_status_ec(n);
6643 if (!rc)
6644 rc = 1;
6645 }
6646
6647 unlock:
6648 mutex_unlock(&volume_mutex);
6649 return rc;
6650 }
6651
6652 static int volume_alsa_set_volume(const u8 vol)
6653 {
6654 dbg_printk(TPACPI_DBG_MIXER,
6655 "ALSA: trying to set volume level to %hu\n", vol);
6656 return __volume_set_volume_ec(vol);
6657 }
6658
6659 static void volume_alsa_notify_change(void)
6660 {
6661 struct tpacpi_alsa_data *d;
6662
6663 if (alsa_card && alsa_card->private_data) {
6664 d = alsa_card->private_data;
6665 if (d->ctl_mute_id)
6666 snd_ctl_notify(alsa_card,
6667 SNDRV_CTL_EVENT_MASK_VALUE,
6668 d->ctl_mute_id);
6669 if (d->ctl_vol_id)
6670 snd_ctl_notify(alsa_card,
6671 SNDRV_CTL_EVENT_MASK_VALUE,
6672 d->ctl_vol_id);
6673 }
6674 }
6675
6676 static int volume_alsa_vol_info(struct snd_kcontrol *kcontrol,
6677 struct snd_ctl_elem_info *uinfo)
6678 {
6679 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
6680 uinfo->count = 1;
6681 uinfo->value.integer.min = 0;
6682 uinfo->value.integer.max = TP_EC_VOLUME_MAX;
6683 return 0;
6684 }
6685
6686 static int volume_alsa_vol_get(struct snd_kcontrol *kcontrol,
6687 struct snd_ctl_elem_value *ucontrol)
6688 {
6689 u8 s;
6690 int rc;
6691
6692 rc = volume_get_status(&s);
6693 if (rc < 0)
6694 return rc;
6695
6696 ucontrol->value.integer.value[0] = s & TP_EC_AUDIO_LVL_MSK;
6697 return 0;
6698 }
6699
6700 static int volume_alsa_vol_put(struct snd_kcontrol *kcontrol,
6701 struct snd_ctl_elem_value *ucontrol)
6702 {
6703 tpacpi_disclose_usertask("ALSA", "set volume to %ld\n",
6704 ucontrol->value.integer.value[0]);
6705 return volume_alsa_set_volume(ucontrol->value.integer.value[0]);
6706 }
6707
6708 #define volume_alsa_mute_info snd_ctl_boolean_mono_info
6709
6710 static int volume_alsa_mute_get(struct snd_kcontrol *kcontrol,
6711 struct snd_ctl_elem_value *ucontrol)
6712 {
6713 u8 s;
6714 int rc;
6715
6716 rc = volume_get_status(&s);
6717 if (rc < 0)
6718 return rc;
6719
6720 ucontrol->value.integer.value[0] =
6721 (s & TP_EC_AUDIO_MUTESW_MSK) ? 0 : 1;
6722 return 0;
6723 }
6724
6725 static int volume_alsa_mute_put(struct snd_kcontrol *kcontrol,
6726 struct snd_ctl_elem_value *ucontrol)
6727 {
6728 tpacpi_disclose_usertask("ALSA", "%smute\n",
6729 ucontrol->value.integer.value[0] ?
6730 "un" : "");
6731 return volume_alsa_set_mute(!ucontrol->value.integer.value[0]);
6732 }
6733
6734 static struct snd_kcontrol_new volume_alsa_control_vol = {
6735 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
6736 .name = "Console Playback Volume",
6737 .index = 0,
6738 .access = SNDRV_CTL_ELEM_ACCESS_READ,
6739 .info = volume_alsa_vol_info,
6740 .get = volume_alsa_vol_get,
6741 };
6742
6743 static struct snd_kcontrol_new volume_alsa_control_mute = {
6744 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
6745 .name = "Console Playback Switch",
6746 .index = 0,
6747 .access = SNDRV_CTL_ELEM_ACCESS_READ,
6748 .info = volume_alsa_mute_info,
6749 .get = volume_alsa_mute_get,
6750 };
6751
6752 static void volume_suspend(void)
6753 {
6754 tpacpi_volume_checkpoint_nvram();
6755 }
6756
6757 static void volume_resume(void)
6758 {
6759 volume_alsa_notify_change();
6760 }
6761
6762 static void volume_shutdown(void)
6763 {
6764 tpacpi_volume_checkpoint_nvram();
6765 }
6766
6767 static void volume_exit(void)
6768 {
6769 if (alsa_card) {
6770 snd_card_free(alsa_card);
6771 alsa_card = NULL;
6772 }
6773
6774 tpacpi_volume_checkpoint_nvram();
6775 }
6776
6777 static int __init volume_create_alsa_mixer(void)
6778 {
6779 struct snd_card *card;
6780 struct tpacpi_alsa_data *data;
6781 struct snd_kcontrol *ctl_vol;
6782 struct snd_kcontrol *ctl_mute;
6783 int rc;
6784
6785 rc = snd_card_create(alsa_index, alsa_id, THIS_MODULE,
6786 sizeof(struct tpacpi_alsa_data), &card);
6787 if (rc < 0 || !card) {
6788 pr_err("Failed to create ALSA card structures: %d\n", rc);
6789 return 1;
6790 }
6791
6792 BUG_ON(!card->private_data);
6793 data = card->private_data;
6794 data->card = card;
6795
6796 strlcpy(card->driver, TPACPI_ALSA_DRVNAME,
6797 sizeof(card->driver));
6798 strlcpy(card->shortname, TPACPI_ALSA_SHRTNAME,
6799 sizeof(card->shortname));
6800 snprintf(card->mixername, sizeof(card->mixername), "ThinkPad EC %s",
6801 (thinkpad_id.ec_version_str) ?
6802 thinkpad_id.ec_version_str : "(unknown)");
6803 snprintf(card->longname, sizeof(card->longname),
6804 "%s at EC reg 0x%02x, fw %s", card->shortname, TP_EC_AUDIO,
6805 (thinkpad_id.ec_version_str) ?
6806 thinkpad_id.ec_version_str : "unknown");
6807
6808 if (volume_control_allowed) {
6809 volume_alsa_control_vol.put = volume_alsa_vol_put;
6810 volume_alsa_control_vol.access =
6811 SNDRV_CTL_ELEM_ACCESS_READWRITE;
6812
6813 volume_alsa_control_mute.put = volume_alsa_mute_put;
6814 volume_alsa_control_mute.access =
6815 SNDRV_CTL_ELEM_ACCESS_READWRITE;
6816 }
6817
6818 if (!tp_features.mixer_no_level_control) {
6819 ctl_vol = snd_ctl_new1(&volume_alsa_control_vol, NULL);
6820 rc = snd_ctl_add(card, ctl_vol);
6821 if (rc < 0) {
6822 pr_err("Failed to create ALSA volume control: %d\n",
6823 rc);
6824 goto err_exit;
6825 }
6826 data->ctl_vol_id = &ctl_vol->id;
6827 }
6828
6829 ctl_mute = snd_ctl_new1(&volume_alsa_control_mute, NULL);
6830 rc = snd_ctl_add(card, ctl_mute);
6831 if (rc < 0) {
6832 pr_err("Failed to create ALSA mute control: %d\n", rc);
6833 goto err_exit;
6834 }
6835 data->ctl_mute_id = &ctl_mute->id;
6836
6837 snd_card_set_dev(card, &tpacpi_pdev->dev);
6838 rc = snd_card_register(card);
6839 if (rc < 0) {
6840 pr_err("Failed to register ALSA card: %d\n", rc);
6841 goto err_exit;
6842 }
6843
6844 alsa_card = card;
6845 return 0;
6846
6847 err_exit:
6848 snd_card_free(card);
6849 return 1;
6850 }
6851
6852 #define TPACPI_VOL_Q_MUTEONLY 0x0001 /* Mute-only control available */
6853 #define TPACPI_VOL_Q_LEVEL 0x0002 /* Volume control available */
6854
6855 static const struct tpacpi_quirk volume_quirk_table[] __initconst = {
6856 /* Whitelist volume level on all IBM by default */
6857 { .vendor = PCI_VENDOR_ID_IBM,
6858 .bios = TPACPI_MATCH_ANY,
6859 .ec = TPACPI_MATCH_ANY,
6860 .quirks = TPACPI_VOL_Q_LEVEL },
6861
6862 /* Lenovo models with volume control (needs confirmation) */
6863 TPACPI_QEC_LNV('7', 'C', TPACPI_VOL_Q_LEVEL), /* R60/i */
6864 TPACPI_QEC_LNV('7', 'E', TPACPI_VOL_Q_LEVEL), /* R60e/i */
6865 TPACPI_QEC_LNV('7', '9', TPACPI_VOL_Q_LEVEL), /* T60/p */
6866 TPACPI_QEC_LNV('7', 'B', TPACPI_VOL_Q_LEVEL), /* X60/s */
6867 TPACPI_QEC_LNV('7', 'J', TPACPI_VOL_Q_LEVEL), /* X60t */
6868 TPACPI_QEC_LNV('7', '7', TPACPI_VOL_Q_LEVEL), /* Z60 */
6869 TPACPI_QEC_LNV('7', 'F', TPACPI_VOL_Q_LEVEL), /* Z61 */
6870
6871 /* Whitelist mute-only on all Lenovo by default */
6872 { .vendor = PCI_VENDOR_ID_LENOVO,
6873 .bios = TPACPI_MATCH_ANY,
6874 .ec = TPACPI_MATCH_ANY,
6875 .quirks = TPACPI_VOL_Q_MUTEONLY }
6876 };
6877
6878 static int __init volume_init(struct ibm_init_struct *iibm)
6879 {
6880 unsigned long quirks;
6881 int rc;
6882
6883 vdbg_printk(TPACPI_DBG_INIT, "initializing volume subdriver\n");
6884
6885 mutex_init(&volume_mutex);
6886
6887 /*
6888 * Check for module parameter bogosity, note that we
6889 * init volume_mode to TPACPI_VOL_MODE_MAX in order to be
6890 * able to detect "unspecified"
6891 */
6892 if (volume_mode > TPACPI_VOL_MODE_MAX)
6893 return -EINVAL;
6894
6895 if (volume_mode == TPACPI_VOL_MODE_UCMS_STEP) {
6896 pr_err("UCMS step volume mode not implemented, "
6897 "please contact %s\n", TPACPI_MAIL);
6898 return 1;
6899 }
6900
6901 if (volume_capabilities >= TPACPI_VOL_CAP_MAX)
6902 return -EINVAL;
6903
6904 /*
6905 * The ALSA mixer is our primary interface.
6906 * When disabled, don't install the subdriver at all
6907 */
6908 if (!alsa_enable) {
6909 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
6910 "ALSA mixer disabled by parameter, "
6911 "not loading volume subdriver...\n");
6912 return 1;
6913 }
6914
6915 quirks = tpacpi_check_quirks(volume_quirk_table,
6916 ARRAY_SIZE(volume_quirk_table));
6917
6918 switch (volume_capabilities) {
6919 case TPACPI_VOL_CAP_AUTO:
6920 if (quirks & TPACPI_VOL_Q_MUTEONLY)
6921 tp_features.mixer_no_level_control = 1;
6922 else if (quirks & TPACPI_VOL_Q_LEVEL)
6923 tp_features.mixer_no_level_control = 0;
6924 else
6925 return 1; /* no mixer */
6926 break;
6927 case TPACPI_VOL_CAP_VOLMUTE:
6928 tp_features.mixer_no_level_control = 0;
6929 break;
6930 case TPACPI_VOL_CAP_MUTEONLY:
6931 tp_features.mixer_no_level_control = 1;
6932 break;
6933 default:
6934 return 1;
6935 }
6936
6937 if (volume_capabilities != TPACPI_VOL_CAP_AUTO)
6938 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
6939 "using user-supplied volume_capabilities=%d\n",
6940 volume_capabilities);
6941
6942 if (volume_mode == TPACPI_VOL_MODE_AUTO ||
6943 volume_mode == TPACPI_VOL_MODE_MAX) {
6944 volume_mode = TPACPI_VOL_MODE_ECNVRAM;
6945
6946 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
6947 "driver auto-selected volume_mode=%d\n",
6948 volume_mode);
6949 } else {
6950 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
6951 "using user-supplied volume_mode=%d\n",
6952 volume_mode);
6953 }
6954
6955 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
6956 "mute is supported, volume control is %s\n",
6957 str_supported(!tp_features.mixer_no_level_control));
6958
6959 rc = volume_create_alsa_mixer();
6960 if (rc) {
6961 pr_err("Could not create the ALSA mixer interface\n");
6962 return rc;
6963 }
6964
6965 pr_info("Console audio control enabled, mode: %s\n",
6966 (volume_control_allowed) ?
6967 "override (read/write)" :
6968 "monitor (read only)");
6969
6970 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
6971 "registering volume hotkeys as change notification\n");
6972 tpacpi_hotkey_driver_mask_set(hotkey_driver_mask
6973 | TP_ACPI_HKEY_VOLUP_MASK
6974 | TP_ACPI_HKEY_VOLDWN_MASK
6975 | TP_ACPI_HKEY_MUTE_MASK);
6976
6977 return 0;
6978 }
6979
6980 static int volume_read(struct seq_file *m)
6981 {
6982 u8 status;
6983
6984 if (volume_get_status(&status) < 0) {
6985 seq_printf(m, "level:\t\tunreadable\n");
6986 } else {
6987 if (tp_features.mixer_no_level_control)
6988 seq_printf(m, "level:\t\tunsupported\n");
6989 else
6990 seq_printf(m, "level:\t\t%d\n",
6991 status & TP_EC_AUDIO_LVL_MSK);
6992
6993 seq_printf(m, "mute:\t\t%s\n",
6994 onoff(status, TP_EC_AUDIO_MUTESW));
6995
6996 if (volume_control_allowed) {
6997 seq_printf(m, "commands:\tunmute, mute\n");
6998 if (!tp_features.mixer_no_level_control) {
6999 seq_printf(m,
7000 "commands:\tup, down\n");
7001 seq_printf(m,
7002 "commands:\tlevel <level>"
7003 " (<level> is 0-%d)\n",
7004 TP_EC_VOLUME_MAX);
7005 }
7006 }
7007 }
7008
7009 return 0;
7010 }
7011
7012 static int volume_write(char *buf)
7013 {
7014 u8 s;
7015 u8 new_level, new_mute;
7016 int l;
7017 char *cmd;
7018 int rc;
7019
7020 /*
7021 * We do allow volume control at driver startup, so that the
7022 * user can set initial state through the volume=... parameter hack.
7023 */
7024 if (!volume_control_allowed && tpacpi_lifecycle != TPACPI_LIFE_INIT) {
7025 if (unlikely(!tp_warned.volume_ctrl_forbidden)) {
7026 tp_warned.volume_ctrl_forbidden = 1;
7027 pr_notice("Console audio control in monitor mode, "
7028 "changes are not allowed\n");
7029 pr_notice("Use the volume_control=1 module parameter "
7030 "to enable volume control\n");
7031 }
7032 return -EPERM;
7033 }
7034
7035 rc = volume_get_status(&s);
7036 if (rc < 0)
7037 return rc;
7038
7039 new_level = s & TP_EC_AUDIO_LVL_MSK;
7040 new_mute = s & TP_EC_AUDIO_MUTESW_MSK;
7041
7042 while ((cmd = next_cmd(&buf))) {
7043 if (!tp_features.mixer_no_level_control) {
7044 if (strlencmp(cmd, "up") == 0) {
7045 if (new_mute)
7046 new_mute = 0;
7047 else if (new_level < TP_EC_VOLUME_MAX)
7048 new_level++;
7049 continue;
7050 } else if (strlencmp(cmd, "down") == 0) {
7051 if (new_mute)
7052 new_mute = 0;
7053 else if (new_level > 0)
7054 new_level--;
7055 continue;
7056 } else if (sscanf(cmd, "level %u", &l) == 1 &&
7057 l >= 0 && l <= TP_EC_VOLUME_MAX) {
7058 new_level = l;
7059 continue;
7060 }
7061 }
7062 if (strlencmp(cmd, "mute") == 0)
7063 new_mute = TP_EC_AUDIO_MUTESW_MSK;
7064 else if (strlencmp(cmd, "unmute") == 0)
7065 new_mute = 0;
7066 else
7067 return -EINVAL;
7068 }
7069
7070 if (tp_features.mixer_no_level_control) {
7071 tpacpi_disclose_usertask("procfs volume", "%smute\n",
7072 new_mute ? "" : "un");
7073 rc = volume_set_mute(!!new_mute);
7074 } else {
7075 tpacpi_disclose_usertask("procfs volume",
7076 "%smute and set level to %d\n",
7077 new_mute ? "" : "un", new_level);
7078 rc = volume_set_status(new_mute | new_level);
7079 }
7080 volume_alsa_notify_change();
7081
7082 return (rc == -EINTR) ? -ERESTARTSYS : rc;
7083 }
7084
7085 static struct ibm_struct volume_driver_data = {
7086 .name = "volume",
7087 .read = volume_read,
7088 .write = volume_write,
7089 .exit = volume_exit,
7090 .suspend = volume_suspend,
7091 .resume = volume_resume,
7092 .shutdown = volume_shutdown,
7093 };
7094
7095 #else /* !CONFIG_THINKPAD_ACPI_ALSA_SUPPORT */
7096
7097 #define alsa_card NULL
7098
7099 static void inline volume_alsa_notify_change(void)
7100 {
7101 }
7102
7103 static int __init volume_init(struct ibm_init_struct *iibm)
7104 {
7105 pr_info("volume: disabled as there is no ALSA support in this kernel\n");
7106
7107 return 1;
7108 }
7109
7110 static struct ibm_struct volume_driver_data = {
7111 .name = "volume",
7112 };
7113
7114 #endif /* CONFIG_THINKPAD_ACPI_ALSA_SUPPORT */
7115
7116 /*************************************************************************
7117 * Fan subdriver
7118 */
7119
7120 /*
7121 * FAN ACCESS MODES
7122 *
7123 * TPACPI_FAN_RD_ACPI_GFAN:
7124 * ACPI GFAN method: returns fan level
7125 *
7126 * see TPACPI_FAN_WR_ACPI_SFAN
7127 * EC 0x2f (HFSP) not available if GFAN exists
7128 *
7129 * TPACPI_FAN_WR_ACPI_SFAN:
7130 * ACPI SFAN method: sets fan level, 0 (stop) to 7 (max)
7131 *
7132 * EC 0x2f (HFSP) might be available *for reading*, but do not use
7133 * it for writing.
7134 *
7135 * TPACPI_FAN_WR_TPEC:
7136 * ThinkPad EC register 0x2f (HFSP): fan control loop mode
7137 * Supported on almost all ThinkPads
7138 *
7139 * Fan speed changes of any sort (including those caused by the
7140 * disengaged mode) are usually done slowly by the firmware as the
7141 * maximum amount of fan duty cycle change per second seems to be
7142 * limited.
7143 *
7144 * Reading is not available if GFAN exists.
7145 * Writing is not available if SFAN exists.
7146 *
7147 * Bits
7148 * 7 automatic mode engaged;
7149 * (default operation mode of the ThinkPad)
7150 * fan level is ignored in this mode.
7151 * 6 full speed mode (takes precedence over bit 7);
7152 * not available on all thinkpads. May disable
7153 * the tachometer while the fan controller ramps up
7154 * the speed (which can take up to a few *minutes*).
7155 * Speeds up fan to 100% duty-cycle, which is far above
7156 * the standard RPM levels. It is not impossible that
7157 * it could cause hardware damage.
7158 * 5-3 unused in some models. Extra bits for fan level
7159 * in others, but still useless as all values above
7160 * 7 map to the same speed as level 7 in these models.
7161 * 2-0 fan level (0..7 usually)
7162 * 0x00 = stop
7163 * 0x07 = max (set when temperatures critical)
7164 * Some ThinkPads may have other levels, see
7165 * TPACPI_FAN_WR_ACPI_FANS (X31/X40/X41)
7166 *
7167 * FIRMWARE BUG: on some models, EC 0x2f might not be initialized at
7168 * boot. Apparently the EC does not initialize it, so unless ACPI DSDT
7169 * does so, its initial value is meaningless (0x07).
7170 *
7171 * For firmware bugs, refer to:
7172 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
7173 *
7174 * ----
7175 *
7176 * ThinkPad EC register 0x84 (LSB), 0x85 (MSB):
7177 * Main fan tachometer reading (in RPM)
7178 *
7179 * This register is present on all ThinkPads with a new-style EC, and
7180 * it is known not to be present on the A21m/e, and T22, as there is
7181 * something else in offset 0x84 according to the ACPI DSDT. Other
7182 * ThinkPads from this same time period (and earlier) probably lack the
7183 * tachometer as well.
7184 *
7185 * Unfortunately a lot of ThinkPads with new-style ECs but whose firmware
7186 * was never fixed by IBM to report the EC firmware version string
7187 * probably support the tachometer (like the early X models), so
7188 * detecting it is quite hard. We need more data to know for sure.
7189 *
7190 * FIRMWARE BUG: always read 0x84 first, otherwise incorrect readings
7191 * might result.
7192 *
7193 * FIRMWARE BUG: may go stale while the EC is switching to full speed
7194 * mode.
7195 *
7196 * For firmware bugs, refer to:
7197 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
7198 *
7199 * ----
7200 *
7201 * ThinkPad EC register 0x31 bit 0 (only on select models)
7202 *
7203 * When bit 0 of EC register 0x31 is zero, the tachometer registers
7204 * show the speed of the main fan. When bit 0 of EC register 0x31
7205 * is one, the tachometer registers show the speed of the auxiliary
7206 * fan.
7207 *
7208 * Fan control seems to affect both fans, regardless of the state
7209 * of this bit.
7210 *
7211 * So far, only the firmware for the X60/X61 non-tablet versions
7212 * seem to support this (firmware TP-7M).
7213 *
7214 * TPACPI_FAN_WR_ACPI_FANS:
7215 * ThinkPad X31, X40, X41. Not available in the X60.
7216 *
7217 * FANS ACPI handle: takes three arguments: low speed, medium speed,
7218 * high speed. ACPI DSDT seems to map these three speeds to levels
7219 * as follows: STOP LOW LOW MED MED HIGH HIGH HIGH HIGH
7220 * (this map is stored on FAN0..FAN8 as "0,1,1,2,2,3,3,3,3")
7221 *
7222 * The speeds are stored on handles
7223 * (FANA:FAN9), (FANC:FANB), (FANE:FAND).
7224 *
7225 * There are three default speed sets, accessible as handles:
7226 * FS1L,FS1M,FS1H; FS2L,FS2M,FS2H; FS3L,FS3M,FS3H
7227 *
7228 * ACPI DSDT switches which set is in use depending on various
7229 * factors.
7230 *
7231 * TPACPI_FAN_WR_TPEC is also available and should be used to
7232 * command the fan. The X31/X40/X41 seems to have 8 fan levels,
7233 * but the ACPI tables just mention level 7.
7234 */
7235
7236 enum { /* Fan control constants */
7237 fan_status_offset = 0x2f, /* EC register 0x2f */
7238 fan_rpm_offset = 0x84, /* EC register 0x84: LSB, 0x85 MSB (RPM)
7239 * 0x84 must be read before 0x85 */
7240 fan_select_offset = 0x31, /* EC register 0x31 (Firmware 7M)
7241 bit 0 selects which fan is active */
7242
7243 TP_EC_FAN_FULLSPEED = 0x40, /* EC fan mode: full speed */
7244 TP_EC_FAN_AUTO = 0x80, /* EC fan mode: auto fan control */
7245
7246 TPACPI_FAN_LAST_LEVEL = 0x100, /* Use cached last-seen fan level */
7247 };
7248
7249 enum fan_status_access_mode {
7250 TPACPI_FAN_NONE = 0, /* No fan status or control */
7251 TPACPI_FAN_RD_ACPI_GFAN, /* Use ACPI GFAN */
7252 TPACPI_FAN_RD_TPEC, /* Use ACPI EC regs 0x2f, 0x84-0x85 */
7253 };
7254
7255 enum fan_control_access_mode {
7256 TPACPI_FAN_WR_NONE = 0, /* No fan control */
7257 TPACPI_FAN_WR_ACPI_SFAN, /* Use ACPI SFAN */
7258 TPACPI_FAN_WR_TPEC, /* Use ACPI EC reg 0x2f */
7259 TPACPI_FAN_WR_ACPI_FANS, /* Use ACPI FANS and EC reg 0x2f */
7260 };
7261
7262 enum fan_control_commands {
7263 TPACPI_FAN_CMD_SPEED = 0x0001, /* speed command */
7264 TPACPI_FAN_CMD_LEVEL = 0x0002, /* level command */
7265 TPACPI_FAN_CMD_ENABLE = 0x0004, /* enable/disable cmd,
7266 * and also watchdog cmd */
7267 };
7268
7269 static bool fan_control_allowed;
7270
7271 static enum fan_status_access_mode fan_status_access_mode;
7272 static enum fan_control_access_mode fan_control_access_mode;
7273 static enum fan_control_commands fan_control_commands;
7274
7275 static u8 fan_control_initial_status;
7276 static u8 fan_control_desired_level;
7277 static u8 fan_control_resume_level;
7278 static int fan_watchdog_maxinterval;
7279
7280 static struct mutex fan_mutex;
7281
7282 static void fan_watchdog_fire(struct work_struct *ignored);
7283 static DECLARE_DELAYED_WORK(fan_watchdog_task, fan_watchdog_fire);
7284
7285 TPACPI_HANDLE(fans, ec, "FANS"); /* X31, X40, X41 */
7286 TPACPI_HANDLE(gfan, ec, "GFAN", /* 570 */
7287 "\\FSPD", /* 600e/x, 770e, 770x */
7288 ); /* all others */
7289 TPACPI_HANDLE(sfan, ec, "SFAN", /* 570 */
7290 "JFNS", /* 770x-JL */
7291 ); /* all others */
7292
7293 /*
7294 * Unitialized HFSP quirk: ACPI DSDT and EC fail to initialize the
7295 * HFSP register at boot, so it contains 0x07 but the Thinkpad could
7296 * be in auto mode (0x80).
7297 *
7298 * This is corrected by any write to HFSP either by the driver, or
7299 * by the firmware.
7300 *
7301 * We assume 0x07 really means auto mode while this quirk is active,
7302 * as this is far more likely than the ThinkPad being in level 7,
7303 * which is only used by the firmware during thermal emergencies.
7304 *
7305 * Enable for TP-1Y (T43), TP-78 (R51e), TP-76 (R52),
7306 * TP-70 (T43, R52), which are known to be buggy.
7307 */
7308
7309 static void fan_quirk1_setup(void)
7310 {
7311 if (fan_control_initial_status == 0x07) {
7312 pr_notice("fan_init: initial fan status is unknown, "
7313 "assuming it is in auto mode\n");
7314 tp_features.fan_ctrl_status_undef = 1;
7315 }
7316 }
7317
7318 static void fan_quirk1_handle(u8 *fan_status)
7319 {
7320 if (unlikely(tp_features.fan_ctrl_status_undef)) {
7321 if (*fan_status != fan_control_initial_status) {
7322 /* something changed the HFSP regisnter since
7323 * driver init time, so it is not undefined
7324 * anymore */
7325 tp_features.fan_ctrl_status_undef = 0;
7326 } else {
7327 /* Return most likely status. In fact, it
7328 * might be the only possible status */
7329 *fan_status = TP_EC_FAN_AUTO;
7330 }
7331 }
7332 }
7333
7334 /* Select main fan on X60/X61, NOOP on others */
7335 static bool fan_select_fan1(void)
7336 {
7337 if (tp_features.second_fan) {
7338 u8 val;
7339
7340 if (ec_read(fan_select_offset, &val) < 0)
7341 return false;
7342 val &= 0xFEU;
7343 if (ec_write(fan_select_offset, val) < 0)
7344 return false;
7345 }
7346 return true;
7347 }
7348
7349 /* Select secondary fan on X60/X61 */
7350 static bool fan_select_fan2(void)
7351 {
7352 u8 val;
7353
7354 if (!tp_features.second_fan)
7355 return false;
7356
7357 if (ec_read(fan_select_offset, &val) < 0)
7358 return false;
7359 val |= 0x01U;
7360 if (ec_write(fan_select_offset, val) < 0)
7361 return false;
7362
7363 return true;
7364 }
7365
7366 /*
7367 * Call with fan_mutex held
7368 */
7369 static void fan_update_desired_level(u8 status)
7370 {
7371 if ((status &
7372 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
7373 if (status > 7)
7374 fan_control_desired_level = 7;
7375 else
7376 fan_control_desired_level = status;
7377 }
7378 }
7379
7380 static int fan_get_status(u8 *status)
7381 {
7382 u8 s;
7383
7384 /* TODO:
7385 * Add TPACPI_FAN_RD_ACPI_FANS ? */
7386
7387 switch (fan_status_access_mode) {
7388 case TPACPI_FAN_RD_ACPI_GFAN: {
7389 /* 570, 600e/x, 770e, 770x */
7390 int res;
7391
7392 if (unlikely(!acpi_evalf(gfan_handle, &res, NULL, "d")))
7393 return -EIO;
7394
7395 if (likely(status))
7396 *status = res & 0x07;
7397
7398 break;
7399 }
7400 case TPACPI_FAN_RD_TPEC:
7401 /* all except 570, 600e/x, 770e, 770x */
7402 if (unlikely(!acpi_ec_read(fan_status_offset, &s)))
7403 return -EIO;
7404
7405 if (likely(status)) {
7406 *status = s;
7407 fan_quirk1_handle(status);
7408 }
7409
7410 break;
7411
7412 default:
7413 return -ENXIO;
7414 }
7415
7416 return 0;
7417 }
7418
7419 static int fan_get_status_safe(u8 *status)
7420 {
7421 int rc;
7422 u8 s;
7423
7424 if (mutex_lock_killable(&fan_mutex))
7425 return -ERESTARTSYS;
7426 rc = fan_get_status(&s);
7427 if (!rc)
7428 fan_update_desired_level(s);
7429 mutex_unlock(&fan_mutex);
7430
7431 if (status)
7432 *status = s;
7433
7434 return rc;
7435 }
7436
7437 static int fan_get_speed(unsigned int *speed)
7438 {
7439 u8 hi, lo;
7440
7441 switch (fan_status_access_mode) {
7442 case TPACPI_FAN_RD_TPEC:
7443 /* all except 570, 600e/x, 770e, 770x */
7444 if (unlikely(!fan_select_fan1()))
7445 return -EIO;
7446 if (unlikely(!acpi_ec_read(fan_rpm_offset, &lo) ||
7447 !acpi_ec_read(fan_rpm_offset + 1, &hi)))
7448 return -EIO;
7449
7450 if (likely(speed))
7451 *speed = (hi << 8) | lo;
7452
7453 break;
7454
7455 default:
7456 return -ENXIO;
7457 }
7458
7459 return 0;
7460 }
7461
7462 static int fan2_get_speed(unsigned int *speed)
7463 {
7464 u8 hi, lo;
7465 bool rc;
7466
7467 switch (fan_status_access_mode) {
7468 case TPACPI_FAN_RD_TPEC:
7469 /* all except 570, 600e/x, 770e, 770x */
7470 if (unlikely(!fan_select_fan2()))
7471 return -EIO;
7472 rc = !acpi_ec_read(fan_rpm_offset, &lo) ||
7473 !acpi_ec_read(fan_rpm_offset + 1, &hi);
7474 fan_select_fan1(); /* play it safe */
7475 if (rc)
7476 return -EIO;
7477
7478 if (likely(speed))
7479 *speed = (hi << 8) | lo;
7480
7481 break;
7482
7483 default:
7484 return -ENXIO;
7485 }
7486
7487 return 0;
7488 }
7489
7490 static int fan_set_level(int level)
7491 {
7492 if (!fan_control_allowed)
7493 return -EPERM;
7494
7495 switch (fan_control_access_mode) {
7496 case TPACPI_FAN_WR_ACPI_SFAN:
7497 if (level >= 0 && level <= 7) {
7498 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", level))
7499 return -EIO;
7500 } else
7501 return -EINVAL;
7502 break;
7503
7504 case TPACPI_FAN_WR_ACPI_FANS:
7505 case TPACPI_FAN_WR_TPEC:
7506 if (!(level & TP_EC_FAN_AUTO) &&
7507 !(level & TP_EC_FAN_FULLSPEED) &&
7508 ((level < 0) || (level > 7)))
7509 return -EINVAL;
7510
7511 /* safety net should the EC not support AUTO
7512 * or FULLSPEED mode bits and just ignore them */
7513 if (level & TP_EC_FAN_FULLSPEED)
7514 level |= 7; /* safety min speed 7 */
7515 else if (level & TP_EC_FAN_AUTO)
7516 level |= 4; /* safety min speed 4 */
7517
7518 if (!acpi_ec_write(fan_status_offset, level))
7519 return -EIO;
7520 else
7521 tp_features.fan_ctrl_status_undef = 0;
7522 break;
7523
7524 default:
7525 return -ENXIO;
7526 }
7527
7528 vdbg_printk(TPACPI_DBG_FAN,
7529 "fan control: set fan control register to 0x%02x\n", level);
7530 return 0;
7531 }
7532
7533 static int fan_set_level_safe(int level)
7534 {
7535 int rc;
7536
7537 if (!fan_control_allowed)
7538 return -EPERM;
7539
7540 if (mutex_lock_killable(&fan_mutex))
7541 return -ERESTARTSYS;
7542
7543 if (level == TPACPI_FAN_LAST_LEVEL)
7544 level = fan_control_desired_level;
7545
7546 rc = fan_set_level(level);
7547 if (!rc)
7548 fan_update_desired_level(level);
7549
7550 mutex_unlock(&fan_mutex);
7551 return rc;
7552 }
7553
7554 static int fan_set_enable(void)
7555 {
7556 u8 s;
7557 int rc;
7558
7559 if (!fan_control_allowed)
7560 return -EPERM;
7561
7562 if (mutex_lock_killable(&fan_mutex))
7563 return -ERESTARTSYS;
7564
7565 switch (fan_control_access_mode) {
7566 case TPACPI_FAN_WR_ACPI_FANS:
7567 case TPACPI_FAN_WR_TPEC:
7568 rc = fan_get_status(&s);
7569 if (rc < 0)
7570 break;
7571
7572 /* Don't go out of emergency fan mode */
7573 if (s != 7) {
7574 s &= 0x07;
7575 s |= TP_EC_FAN_AUTO | 4; /* min fan speed 4 */
7576 }
7577
7578 if (!acpi_ec_write(fan_status_offset, s))
7579 rc = -EIO;
7580 else {
7581 tp_features.fan_ctrl_status_undef = 0;
7582 rc = 0;
7583 }
7584 break;
7585
7586 case TPACPI_FAN_WR_ACPI_SFAN:
7587 rc = fan_get_status(&s);
7588 if (rc < 0)
7589 break;
7590
7591 s &= 0x07;
7592
7593 /* Set fan to at least level 4 */
7594 s |= 4;
7595
7596 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", s))
7597 rc = -EIO;
7598 else
7599 rc = 0;
7600 break;
7601
7602 default:
7603 rc = -ENXIO;
7604 }
7605
7606 mutex_unlock(&fan_mutex);
7607
7608 if (!rc)
7609 vdbg_printk(TPACPI_DBG_FAN,
7610 "fan control: set fan control register to 0x%02x\n",
7611 s);
7612 return rc;
7613 }
7614
7615 static int fan_set_disable(void)
7616 {
7617 int rc;
7618
7619 if (!fan_control_allowed)
7620 return -EPERM;
7621
7622 if (mutex_lock_killable(&fan_mutex))
7623 return -ERESTARTSYS;
7624
7625 rc = 0;
7626 switch (fan_control_access_mode) {
7627 case TPACPI_FAN_WR_ACPI_FANS:
7628 case TPACPI_FAN_WR_TPEC:
7629 if (!acpi_ec_write(fan_status_offset, 0x00))
7630 rc = -EIO;
7631 else {
7632 fan_control_desired_level = 0;
7633 tp_features.fan_ctrl_status_undef = 0;
7634 }
7635 break;
7636
7637 case TPACPI_FAN_WR_ACPI_SFAN:
7638 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", 0x00))
7639 rc = -EIO;
7640 else
7641 fan_control_desired_level = 0;
7642 break;
7643
7644 default:
7645 rc = -ENXIO;
7646 }
7647
7648 if (!rc)
7649 vdbg_printk(TPACPI_DBG_FAN,
7650 "fan control: set fan control register to 0\n");
7651
7652 mutex_unlock(&fan_mutex);
7653 return rc;
7654 }
7655
7656 static int fan_set_speed(int speed)
7657 {
7658 int rc;
7659
7660 if (!fan_control_allowed)
7661 return -EPERM;
7662
7663 if (mutex_lock_killable(&fan_mutex))
7664 return -ERESTARTSYS;
7665
7666 rc = 0;
7667 switch (fan_control_access_mode) {
7668 case TPACPI_FAN_WR_ACPI_FANS:
7669 if (speed >= 0 && speed <= 65535) {
7670 if (!acpi_evalf(fans_handle, NULL, NULL, "vddd",
7671 speed, speed, speed))
7672 rc = -EIO;
7673 } else
7674 rc = -EINVAL;
7675 break;
7676
7677 default:
7678 rc = -ENXIO;
7679 }
7680
7681 mutex_unlock(&fan_mutex);
7682 return rc;
7683 }
7684
7685 static void fan_watchdog_reset(void)
7686 {
7687 if (fan_control_access_mode == TPACPI_FAN_WR_NONE)
7688 return;
7689
7690 if (fan_watchdog_maxinterval > 0 &&
7691 tpacpi_lifecycle != TPACPI_LIFE_EXITING)
7692 mod_delayed_work(tpacpi_wq, &fan_watchdog_task,
7693 msecs_to_jiffies(fan_watchdog_maxinterval * 1000));
7694 else
7695 cancel_delayed_work(&fan_watchdog_task);
7696 }
7697
7698 static void fan_watchdog_fire(struct work_struct *ignored)
7699 {
7700 int rc;
7701
7702 if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
7703 return;
7704
7705 pr_notice("fan watchdog: enabling fan\n");
7706 rc = fan_set_enable();
7707 if (rc < 0) {
7708 pr_err("fan watchdog: error %d while enabling fan, "
7709 "will try again later...\n", -rc);
7710 /* reschedule for later */
7711 fan_watchdog_reset();
7712 }
7713 }
7714
7715 /*
7716 * SYSFS fan layout: hwmon compatible (device)
7717 *
7718 * pwm*_enable:
7719 * 0: "disengaged" mode
7720 * 1: manual mode
7721 * 2: native EC "auto" mode (recommended, hardware default)
7722 *
7723 * pwm*: set speed in manual mode, ignored otherwise.
7724 * 0 is level 0; 255 is level 7. Intermediate points done with linear
7725 * interpolation.
7726 *
7727 * fan*_input: tachometer reading, RPM
7728 *
7729 *
7730 * SYSFS fan layout: extensions
7731 *
7732 * fan_watchdog (driver):
7733 * fan watchdog interval in seconds, 0 disables (default), max 120
7734 */
7735
7736 /* sysfs fan pwm1_enable ----------------------------------------------- */
7737 static ssize_t fan_pwm1_enable_show(struct device *dev,
7738 struct device_attribute *attr,
7739 char *buf)
7740 {
7741 int res, mode;
7742 u8 status;
7743
7744 res = fan_get_status_safe(&status);
7745 if (res)
7746 return res;
7747
7748 if (status & TP_EC_FAN_FULLSPEED) {
7749 mode = 0;
7750 } else if (status & TP_EC_FAN_AUTO) {
7751 mode = 2;
7752 } else
7753 mode = 1;
7754
7755 return snprintf(buf, PAGE_SIZE, "%d\n", mode);
7756 }
7757
7758 static ssize_t fan_pwm1_enable_store(struct device *dev,
7759 struct device_attribute *attr,
7760 const char *buf, size_t count)
7761 {
7762 unsigned long t;
7763 int res, level;
7764
7765 if (parse_strtoul(buf, 2, &t))
7766 return -EINVAL;
7767
7768 tpacpi_disclose_usertask("hwmon pwm1_enable",
7769 "set fan mode to %lu\n", t);
7770
7771 switch (t) {
7772 case 0:
7773 level = TP_EC_FAN_FULLSPEED;
7774 break;
7775 case 1:
7776 level = TPACPI_FAN_LAST_LEVEL;
7777 break;
7778 case 2:
7779 level = TP_EC_FAN_AUTO;
7780 break;
7781 case 3:
7782 /* reserved for software-controlled auto mode */
7783 return -ENOSYS;
7784 default:
7785 return -EINVAL;
7786 }
7787
7788 res = fan_set_level_safe(level);
7789 if (res == -ENXIO)
7790 return -EINVAL;
7791 else if (res < 0)
7792 return res;
7793
7794 fan_watchdog_reset();
7795
7796 return count;
7797 }
7798
7799 static struct device_attribute dev_attr_fan_pwm1_enable =
7800 __ATTR(pwm1_enable, S_IWUSR | S_IRUGO,
7801 fan_pwm1_enable_show, fan_pwm1_enable_store);
7802
7803 /* sysfs fan pwm1 ------------------------------------------------------ */
7804 static ssize_t fan_pwm1_show(struct device *dev,
7805 struct device_attribute *attr,
7806 char *buf)
7807 {
7808 int res;
7809 u8 status;
7810
7811 res = fan_get_status_safe(&status);
7812 if (res)
7813 return res;
7814
7815 if ((status &
7816 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) != 0)
7817 status = fan_control_desired_level;
7818
7819 if (status > 7)
7820 status = 7;
7821
7822 return snprintf(buf, PAGE_SIZE, "%u\n", (status * 255) / 7);
7823 }
7824
7825 static ssize_t fan_pwm1_store(struct device *dev,
7826 struct device_attribute *attr,
7827 const char *buf, size_t count)
7828 {
7829 unsigned long s;
7830 int rc;
7831 u8 status, newlevel;
7832
7833 if (parse_strtoul(buf, 255, &s))
7834 return -EINVAL;
7835
7836 tpacpi_disclose_usertask("hwmon pwm1",
7837 "set fan speed to %lu\n", s);
7838
7839 /* scale down from 0-255 to 0-7 */
7840 newlevel = (s >> 5) & 0x07;
7841
7842 if (mutex_lock_killable(&fan_mutex))
7843 return -ERESTARTSYS;
7844
7845 rc = fan_get_status(&status);
7846 if (!rc && (status &
7847 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
7848 rc = fan_set_level(newlevel);
7849 if (rc == -ENXIO)
7850 rc = -EINVAL;
7851 else if (!rc) {
7852 fan_update_desired_level(newlevel);
7853 fan_watchdog_reset();
7854 }
7855 }
7856
7857 mutex_unlock(&fan_mutex);
7858 return (rc)? rc : count;
7859 }
7860
7861 static struct device_attribute dev_attr_fan_pwm1 =
7862 __ATTR(pwm1, S_IWUSR | S_IRUGO,
7863 fan_pwm1_show, fan_pwm1_store);
7864
7865 /* sysfs fan fan1_input ------------------------------------------------ */
7866 static ssize_t fan_fan1_input_show(struct device *dev,
7867 struct device_attribute *attr,
7868 char *buf)
7869 {
7870 int res;
7871 unsigned int speed;
7872
7873 res = fan_get_speed(&speed);
7874 if (res < 0)
7875 return res;
7876
7877 return snprintf(buf, PAGE_SIZE, "%u\n", speed);
7878 }
7879
7880 static struct device_attribute dev_attr_fan_fan1_input =
7881 __ATTR(fan1_input, S_IRUGO,
7882 fan_fan1_input_show, NULL);
7883
7884 /* sysfs fan fan2_input ------------------------------------------------ */
7885 static ssize_t fan_fan2_input_show(struct device *dev,
7886 struct device_attribute *attr,
7887 char *buf)
7888 {
7889 int res;
7890 unsigned int speed;
7891
7892 res = fan2_get_speed(&speed);
7893 if (res < 0)
7894 return res;
7895
7896 return snprintf(buf, PAGE_SIZE, "%u\n", speed);
7897 }
7898
7899 static struct device_attribute dev_attr_fan_fan2_input =
7900 __ATTR(fan2_input, S_IRUGO,
7901 fan_fan2_input_show, NULL);
7902
7903 /* sysfs fan fan_watchdog (hwmon driver) ------------------------------- */
7904 static ssize_t fan_fan_watchdog_show(struct device_driver *drv,
7905 char *buf)
7906 {
7907 return snprintf(buf, PAGE_SIZE, "%u\n", fan_watchdog_maxinterval);
7908 }
7909
7910 static ssize_t fan_fan_watchdog_store(struct device_driver *drv,
7911 const char *buf, size_t count)
7912 {
7913 unsigned long t;
7914
7915 if (parse_strtoul(buf, 120, &t))
7916 return -EINVAL;
7917
7918 if (!fan_control_allowed)
7919 return -EPERM;
7920
7921 fan_watchdog_maxinterval = t;
7922 fan_watchdog_reset();
7923
7924 tpacpi_disclose_usertask("fan_watchdog", "set to %lu\n", t);
7925
7926 return count;
7927 }
7928
7929 static DRIVER_ATTR(fan_watchdog, S_IWUSR | S_IRUGO,
7930 fan_fan_watchdog_show, fan_fan_watchdog_store);
7931
7932 /* --------------------------------------------------------------------- */
7933 static struct attribute *fan_attributes[] = {
7934 &dev_attr_fan_pwm1_enable.attr, &dev_attr_fan_pwm1.attr,
7935 &dev_attr_fan_fan1_input.attr,
7936 NULL, /* for fan2_input */
7937 NULL
7938 };
7939
7940 static const struct attribute_group fan_attr_group = {
7941 .attrs = fan_attributes,
7942 };
7943
7944 #define TPACPI_FAN_Q1 0x0001 /* Unitialized HFSP */
7945 #define TPACPI_FAN_2FAN 0x0002 /* EC 0x31 bit 0 selects fan2 */
7946
7947 #define TPACPI_FAN_QI(__id1, __id2, __quirks) \
7948 { .vendor = PCI_VENDOR_ID_IBM, \
7949 .bios = TPACPI_MATCH_ANY, \
7950 .ec = TPID(__id1, __id2), \
7951 .quirks = __quirks }
7952
7953 #define TPACPI_FAN_QL(__id1, __id2, __quirks) \
7954 { .vendor = PCI_VENDOR_ID_LENOVO, \
7955 .bios = TPACPI_MATCH_ANY, \
7956 .ec = TPID(__id1, __id2), \
7957 .quirks = __quirks }
7958
7959 static const struct tpacpi_quirk fan_quirk_table[] __initconst = {
7960 TPACPI_FAN_QI('1', 'Y', TPACPI_FAN_Q1),
7961 TPACPI_FAN_QI('7', '8', TPACPI_FAN_Q1),
7962 TPACPI_FAN_QI('7', '6', TPACPI_FAN_Q1),
7963 TPACPI_FAN_QI('7', '0', TPACPI_FAN_Q1),
7964 TPACPI_FAN_QL('7', 'M', TPACPI_FAN_2FAN),
7965 };
7966
7967 #undef TPACPI_FAN_QL
7968 #undef TPACPI_FAN_QI
7969
7970 static int __init fan_init(struct ibm_init_struct *iibm)
7971 {
7972 int rc;
7973 unsigned long quirks;
7974
7975 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
7976 "initializing fan subdriver\n");
7977
7978 mutex_init(&fan_mutex);
7979 fan_status_access_mode = TPACPI_FAN_NONE;
7980 fan_control_access_mode = TPACPI_FAN_WR_NONE;
7981 fan_control_commands = 0;
7982 fan_watchdog_maxinterval = 0;
7983 tp_features.fan_ctrl_status_undef = 0;
7984 tp_features.second_fan = 0;
7985 fan_control_desired_level = 7;
7986
7987 if (tpacpi_is_ibm()) {
7988 TPACPI_ACPIHANDLE_INIT(fans);
7989 TPACPI_ACPIHANDLE_INIT(gfan);
7990 TPACPI_ACPIHANDLE_INIT(sfan);
7991 }
7992
7993 quirks = tpacpi_check_quirks(fan_quirk_table,
7994 ARRAY_SIZE(fan_quirk_table));
7995
7996 if (gfan_handle) {
7997 /* 570, 600e/x, 770e, 770x */
7998 fan_status_access_mode = TPACPI_FAN_RD_ACPI_GFAN;
7999 } else {
8000 /* all other ThinkPads: note that even old-style
8001 * ThinkPad ECs supports the fan control register */
8002 if (likely(acpi_ec_read(fan_status_offset,
8003 &fan_control_initial_status))) {
8004 fan_status_access_mode = TPACPI_FAN_RD_TPEC;
8005 if (quirks & TPACPI_FAN_Q1)
8006 fan_quirk1_setup();
8007 if (quirks & TPACPI_FAN_2FAN) {
8008 tp_features.second_fan = 1;
8009 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
8010 "secondary fan support enabled\n");
8011 }
8012 } else {
8013 pr_err("ThinkPad ACPI EC access misbehaving, "
8014 "fan status and control unavailable\n");
8015 return 1;
8016 }
8017 }
8018
8019 if (sfan_handle) {
8020 /* 570, 770x-JL */
8021 fan_control_access_mode = TPACPI_FAN_WR_ACPI_SFAN;
8022 fan_control_commands |=
8023 TPACPI_FAN_CMD_LEVEL | TPACPI_FAN_CMD_ENABLE;
8024 } else {
8025 if (!gfan_handle) {
8026 /* gfan without sfan means no fan control */
8027 /* all other models implement TP EC 0x2f control */
8028
8029 if (fans_handle) {
8030 /* X31, X40, X41 */
8031 fan_control_access_mode =
8032 TPACPI_FAN_WR_ACPI_FANS;
8033 fan_control_commands |=
8034 TPACPI_FAN_CMD_SPEED |
8035 TPACPI_FAN_CMD_LEVEL |
8036 TPACPI_FAN_CMD_ENABLE;
8037 } else {
8038 fan_control_access_mode = TPACPI_FAN_WR_TPEC;
8039 fan_control_commands |=
8040 TPACPI_FAN_CMD_LEVEL |
8041 TPACPI_FAN_CMD_ENABLE;
8042 }
8043 }
8044 }
8045
8046 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
8047 "fan is %s, modes %d, %d\n",
8048 str_supported(fan_status_access_mode != TPACPI_FAN_NONE ||
8049 fan_control_access_mode != TPACPI_FAN_WR_NONE),
8050 fan_status_access_mode, fan_control_access_mode);
8051
8052 /* fan control master switch */
8053 if (!fan_control_allowed) {
8054 fan_control_access_mode = TPACPI_FAN_WR_NONE;
8055 fan_control_commands = 0;
8056 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
8057 "fan control features disabled by parameter\n");
8058 }
8059
8060 /* update fan_control_desired_level */
8061 if (fan_status_access_mode != TPACPI_FAN_NONE)
8062 fan_get_status_safe(NULL);
8063
8064 if (fan_status_access_mode != TPACPI_FAN_NONE ||
8065 fan_control_access_mode != TPACPI_FAN_WR_NONE) {
8066 if (tp_features.second_fan) {
8067 /* attach second fan tachometer */
8068 fan_attributes[ARRAY_SIZE(fan_attributes)-2] =
8069 &dev_attr_fan_fan2_input.attr;
8070 }
8071 rc = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
8072 &fan_attr_group);
8073 if (rc < 0)
8074 return rc;
8075
8076 rc = driver_create_file(&tpacpi_hwmon_pdriver.driver,
8077 &driver_attr_fan_watchdog);
8078 if (rc < 0) {
8079 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
8080 &fan_attr_group);
8081 return rc;
8082 }
8083 return 0;
8084 } else
8085 return 1;
8086 }
8087
8088 static void fan_exit(void)
8089 {
8090 vdbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_FAN,
8091 "cancelling any pending fan watchdog tasks\n");
8092
8093 /* FIXME: can we really do this unconditionally? */
8094 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj, &fan_attr_group);
8095 driver_remove_file(&tpacpi_hwmon_pdriver.driver,
8096 &driver_attr_fan_watchdog);
8097
8098 cancel_delayed_work(&fan_watchdog_task);
8099 flush_workqueue(tpacpi_wq);
8100 }
8101
8102 static void fan_suspend(void)
8103 {
8104 int rc;
8105
8106 if (!fan_control_allowed)
8107 return;
8108
8109 /* Store fan status in cache */
8110 fan_control_resume_level = 0;
8111 rc = fan_get_status_safe(&fan_control_resume_level);
8112 if (rc < 0)
8113 pr_notice("failed to read fan level for later "
8114 "restore during resume: %d\n", rc);
8115
8116 /* if it is undefined, don't attempt to restore it.
8117 * KEEP THIS LAST */
8118 if (tp_features.fan_ctrl_status_undef)
8119 fan_control_resume_level = 0;
8120 }
8121
8122 static void fan_resume(void)
8123 {
8124 u8 current_level = 7;
8125 bool do_set = false;
8126 int rc;
8127
8128 /* DSDT *always* updates status on resume */
8129 tp_features.fan_ctrl_status_undef = 0;
8130
8131 if (!fan_control_allowed ||
8132 !fan_control_resume_level ||
8133 (fan_get_status_safe(&current_level) < 0))
8134 return;
8135
8136 switch (fan_control_access_mode) {
8137 case TPACPI_FAN_WR_ACPI_SFAN:
8138 /* never decrease fan level */
8139 do_set = (fan_control_resume_level > current_level);
8140 break;
8141 case TPACPI_FAN_WR_ACPI_FANS:
8142 case TPACPI_FAN_WR_TPEC:
8143 /* never decrease fan level, scale is:
8144 * TP_EC_FAN_FULLSPEED > 7 >= TP_EC_FAN_AUTO
8145 *
8146 * We expect the firmware to set either 7 or AUTO, but we
8147 * handle FULLSPEED out of paranoia.
8148 *
8149 * So, we can safely only restore FULLSPEED or 7, anything
8150 * else could slow the fan. Restoring AUTO is useless, at
8151 * best that's exactly what the DSDT already set (it is the
8152 * slower it uses).
8153 *
8154 * Always keep in mind that the DSDT *will* have set the
8155 * fans to what the vendor supposes is the best level. We
8156 * muck with it only to speed the fan up.
8157 */
8158 if (fan_control_resume_level != 7 &&
8159 !(fan_control_resume_level & TP_EC_FAN_FULLSPEED))
8160 return;
8161 else
8162 do_set = !(current_level & TP_EC_FAN_FULLSPEED) &&
8163 (current_level != fan_control_resume_level);
8164 break;
8165 default:
8166 return;
8167 }
8168 if (do_set) {
8169 pr_notice("restoring fan level to 0x%02x\n",
8170 fan_control_resume_level);
8171 rc = fan_set_level_safe(fan_control_resume_level);
8172 if (rc < 0)
8173 pr_notice("failed to restore fan level: %d\n", rc);
8174 }
8175 }
8176
8177 static int fan_read(struct seq_file *m)
8178 {
8179 int rc;
8180 u8 status;
8181 unsigned int speed = 0;
8182
8183 switch (fan_status_access_mode) {
8184 case TPACPI_FAN_RD_ACPI_GFAN:
8185 /* 570, 600e/x, 770e, 770x */
8186 rc = fan_get_status_safe(&status);
8187 if (rc < 0)
8188 return rc;
8189
8190 seq_printf(m, "status:\t\t%s\n"
8191 "level:\t\t%d\n",
8192 (status != 0) ? "enabled" : "disabled", status);
8193 break;
8194
8195 case TPACPI_FAN_RD_TPEC:
8196 /* all except 570, 600e/x, 770e, 770x */
8197 rc = fan_get_status_safe(&status);
8198 if (rc < 0)
8199 return rc;
8200
8201 seq_printf(m, "status:\t\t%s\n",
8202 (status != 0) ? "enabled" : "disabled");
8203
8204 rc = fan_get_speed(&speed);
8205 if (rc < 0)
8206 return rc;
8207
8208 seq_printf(m, "speed:\t\t%d\n", speed);
8209
8210 if (status & TP_EC_FAN_FULLSPEED)
8211 /* Disengaged mode takes precedence */
8212 seq_printf(m, "level:\t\tdisengaged\n");
8213 else if (status & TP_EC_FAN_AUTO)
8214 seq_printf(m, "level:\t\tauto\n");
8215 else
8216 seq_printf(m, "level:\t\t%d\n", status);
8217 break;
8218
8219 case TPACPI_FAN_NONE:
8220 default:
8221 seq_printf(m, "status:\t\tnot supported\n");
8222 }
8223
8224 if (fan_control_commands & TPACPI_FAN_CMD_LEVEL) {
8225 seq_printf(m, "commands:\tlevel <level>");
8226
8227 switch (fan_control_access_mode) {
8228 case TPACPI_FAN_WR_ACPI_SFAN:
8229 seq_printf(m, " (<level> is 0-7)\n");
8230 break;
8231
8232 default:
8233 seq_printf(m, " (<level> is 0-7, "
8234 "auto, disengaged, full-speed)\n");
8235 break;
8236 }
8237 }
8238
8239 if (fan_control_commands & TPACPI_FAN_CMD_ENABLE)
8240 seq_printf(m, "commands:\tenable, disable\n"
8241 "commands:\twatchdog <timeout> (<timeout> "
8242 "is 0 (off), 1-120 (seconds))\n");
8243
8244 if (fan_control_commands & TPACPI_FAN_CMD_SPEED)
8245 seq_printf(m, "commands:\tspeed <speed>"
8246 " (<speed> is 0-65535)\n");
8247
8248 return 0;
8249 }
8250
8251 static int fan_write_cmd_level(const char *cmd, int *rc)
8252 {
8253 int level;
8254
8255 if (strlencmp(cmd, "level auto") == 0)
8256 level = TP_EC_FAN_AUTO;
8257 else if ((strlencmp(cmd, "level disengaged") == 0) |
8258 (strlencmp(cmd, "level full-speed") == 0))
8259 level = TP_EC_FAN_FULLSPEED;
8260 else if (sscanf(cmd, "level %d", &level) != 1)
8261 return 0;
8262
8263 *rc = fan_set_level_safe(level);
8264 if (*rc == -ENXIO)
8265 pr_err("level command accepted for unsupported access mode %d\n",
8266 fan_control_access_mode);
8267 else if (!*rc)
8268 tpacpi_disclose_usertask("procfs fan",
8269 "set level to %d\n", level);
8270
8271 return 1;
8272 }
8273
8274 static int fan_write_cmd_enable(const char *cmd, int *rc)
8275 {
8276 if (strlencmp(cmd, "enable") != 0)
8277 return 0;
8278
8279 *rc = fan_set_enable();
8280 if (*rc == -ENXIO)
8281 pr_err("enable command accepted for unsupported access mode %d\n",
8282 fan_control_access_mode);
8283 else if (!*rc)
8284 tpacpi_disclose_usertask("procfs fan", "enable\n");
8285
8286 return 1;
8287 }
8288
8289 static int fan_write_cmd_disable(const char *cmd, int *rc)
8290 {
8291 if (strlencmp(cmd, "disable") != 0)
8292 return 0;
8293
8294 *rc = fan_set_disable();
8295 if (*rc == -ENXIO)
8296 pr_err("disable command accepted for unsupported access mode %d\n",
8297 fan_control_access_mode);
8298 else if (!*rc)
8299 tpacpi_disclose_usertask("procfs fan", "disable\n");
8300
8301 return 1;
8302 }
8303
8304 static int fan_write_cmd_speed(const char *cmd, int *rc)
8305 {
8306 int speed;
8307
8308 /* TODO:
8309 * Support speed <low> <medium> <high> ? */
8310
8311 if (sscanf(cmd, "speed %d", &speed) != 1)
8312 return 0;
8313
8314 *rc = fan_set_speed(speed);
8315 if (*rc == -ENXIO)
8316 pr_err("speed command accepted for unsupported access mode %d\n",
8317 fan_control_access_mode);
8318 else if (!*rc)
8319 tpacpi_disclose_usertask("procfs fan",
8320 "set speed to %d\n", speed);
8321
8322 return 1;
8323 }
8324
8325 static int fan_write_cmd_watchdog(const char *cmd, int *rc)
8326 {
8327 int interval;
8328
8329 if (sscanf(cmd, "watchdog %d", &interval) != 1)
8330 return 0;
8331
8332 if (interval < 0 || interval > 120)
8333 *rc = -EINVAL;
8334 else {
8335 fan_watchdog_maxinterval = interval;
8336 tpacpi_disclose_usertask("procfs fan",
8337 "set watchdog timer to %d\n",
8338 interval);
8339 }
8340
8341 return 1;
8342 }
8343
8344 static int fan_write(char *buf)
8345 {
8346 char *cmd;
8347 int rc = 0;
8348
8349 while (!rc && (cmd = next_cmd(&buf))) {
8350 if (!((fan_control_commands & TPACPI_FAN_CMD_LEVEL) &&
8351 fan_write_cmd_level(cmd, &rc)) &&
8352 !((fan_control_commands & TPACPI_FAN_CMD_ENABLE) &&
8353 (fan_write_cmd_enable(cmd, &rc) ||
8354 fan_write_cmd_disable(cmd, &rc) ||
8355 fan_write_cmd_watchdog(cmd, &rc))) &&
8356 !((fan_control_commands & TPACPI_FAN_CMD_SPEED) &&
8357 fan_write_cmd_speed(cmd, &rc))
8358 )
8359 rc = -EINVAL;
8360 else if (!rc)
8361 fan_watchdog_reset();
8362 }
8363
8364 return rc;
8365 }
8366
8367 static struct ibm_struct fan_driver_data = {
8368 .name = "fan",
8369 .read = fan_read,
8370 .write = fan_write,
8371 .exit = fan_exit,
8372 .suspend = fan_suspend,
8373 .resume = fan_resume,
8374 };
8375
8376 /****************************************************************************
8377 ****************************************************************************
8378 *
8379 * Infrastructure
8380 *
8381 ****************************************************************************
8382 ****************************************************************************/
8383
8384 /*
8385 * HKEY event callout for other subdrivers go here
8386 * (yes, it is ugly, but it is quick, safe, and gets the job done
8387 */
8388 static void tpacpi_driver_event(const unsigned int hkey_event)
8389 {
8390 if (ibm_backlight_device) {
8391 switch (hkey_event) {
8392 case TP_HKEY_EV_BRGHT_UP:
8393 case TP_HKEY_EV_BRGHT_DOWN:
8394 tpacpi_brightness_notify_change();
8395 }
8396 }
8397 if (alsa_card) {
8398 switch (hkey_event) {
8399 case TP_HKEY_EV_VOL_UP:
8400 case TP_HKEY_EV_VOL_DOWN:
8401 case TP_HKEY_EV_VOL_MUTE:
8402 volume_alsa_notify_change();
8403 }
8404 }
8405 }
8406
8407 static void hotkey_driver_event(const unsigned int scancode)
8408 {
8409 tpacpi_driver_event(TP_HKEY_EV_HOTKEY_BASE + scancode);
8410 }
8411
8412 /* sysfs name ---------------------------------------------------------- */
8413 static ssize_t thinkpad_acpi_pdev_name_show(struct device *dev,
8414 struct device_attribute *attr,
8415 char *buf)
8416 {
8417 return snprintf(buf, PAGE_SIZE, "%s\n", TPACPI_NAME);
8418 }
8419
8420 static struct device_attribute dev_attr_thinkpad_acpi_pdev_name =
8421 __ATTR(name, S_IRUGO, thinkpad_acpi_pdev_name_show, NULL);
8422
8423 /* --------------------------------------------------------------------- */
8424
8425 /* /proc support */
8426 static struct proc_dir_entry *proc_dir;
8427
8428 /*
8429 * Module and infrastructure proble, init and exit handling
8430 */
8431
8432 static bool force_load;
8433
8434 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
8435 static const char * __init str_supported(int is_supported)
8436 {
8437 static char text_unsupported[] __initdata = "not supported";
8438
8439 return (is_supported)? &text_unsupported[4] : &text_unsupported[0];
8440 }
8441 #endif /* CONFIG_THINKPAD_ACPI_DEBUG */
8442
8443 static void ibm_exit(struct ibm_struct *ibm)
8444 {
8445 dbg_printk(TPACPI_DBG_EXIT, "removing %s\n", ibm->name);
8446
8447 list_del_init(&ibm->all_drivers);
8448
8449 if (ibm->flags.acpi_notify_installed) {
8450 dbg_printk(TPACPI_DBG_EXIT,
8451 "%s: acpi_remove_notify_handler\n", ibm->name);
8452 BUG_ON(!ibm->acpi);
8453 acpi_remove_notify_handler(*ibm->acpi->handle,
8454 ibm->acpi->type,
8455 dispatch_acpi_notify);
8456 ibm->flags.acpi_notify_installed = 0;
8457 }
8458
8459 if (ibm->flags.proc_created) {
8460 dbg_printk(TPACPI_DBG_EXIT,
8461 "%s: remove_proc_entry\n", ibm->name);
8462 remove_proc_entry(ibm->name, proc_dir);
8463 ibm->flags.proc_created = 0;
8464 }
8465
8466 if (ibm->flags.acpi_driver_registered) {
8467 dbg_printk(TPACPI_DBG_EXIT,
8468 "%s: acpi_bus_unregister_driver\n", ibm->name);
8469 BUG_ON(!ibm->acpi);
8470 acpi_bus_unregister_driver(ibm->acpi->driver);
8471 kfree(ibm->acpi->driver);
8472 ibm->acpi->driver = NULL;
8473 ibm->flags.acpi_driver_registered = 0;
8474 }
8475
8476 if (ibm->flags.init_called && ibm->exit) {
8477 ibm->exit();
8478 ibm->flags.init_called = 0;
8479 }
8480
8481 dbg_printk(TPACPI_DBG_INIT, "finished removing %s\n", ibm->name);
8482 }
8483
8484 static int __init ibm_init(struct ibm_init_struct *iibm)
8485 {
8486 int ret;
8487 struct ibm_struct *ibm = iibm->data;
8488 struct proc_dir_entry *entry;
8489
8490 BUG_ON(ibm == NULL);
8491
8492 INIT_LIST_HEAD(&ibm->all_drivers);
8493
8494 if (ibm->flags.experimental && !experimental)
8495 return 0;
8496
8497 dbg_printk(TPACPI_DBG_INIT,
8498 "probing for %s\n", ibm->name);
8499
8500 if (iibm->init) {
8501 ret = iibm->init(iibm);
8502 if (ret > 0)
8503 return 0; /* probe failed */
8504 if (ret)
8505 return ret;
8506
8507 ibm->flags.init_called = 1;
8508 }
8509
8510 if (ibm->acpi) {
8511 if (ibm->acpi->hid) {
8512 ret = register_tpacpi_subdriver(ibm);
8513 if (ret)
8514 goto err_out;
8515 }
8516
8517 if (ibm->acpi->notify) {
8518 ret = setup_acpi_notify(ibm);
8519 if (ret == -ENODEV) {
8520 pr_notice("disabling subdriver %s\n",
8521 ibm->name);
8522 ret = 0;
8523 goto err_out;
8524 }
8525 if (ret < 0)
8526 goto err_out;
8527 }
8528 }
8529
8530 dbg_printk(TPACPI_DBG_INIT,
8531 "%s installed\n", ibm->name);
8532
8533 if (ibm->read) {
8534 umode_t mode = iibm->base_procfs_mode;
8535
8536 if (!mode)
8537 mode = S_IRUGO;
8538 if (ibm->write)
8539 mode |= S_IWUSR;
8540 entry = proc_create_data(ibm->name, mode, proc_dir,
8541 &dispatch_proc_fops, ibm);
8542 if (!entry) {
8543 pr_err("unable to create proc entry %s\n", ibm->name);
8544 ret = -ENODEV;
8545 goto err_out;
8546 }
8547 ibm->flags.proc_created = 1;
8548 }
8549
8550 list_add_tail(&ibm->all_drivers, &tpacpi_all_drivers);
8551
8552 return 0;
8553
8554 err_out:
8555 dbg_printk(TPACPI_DBG_INIT,
8556 "%s: at error exit path with result %d\n",
8557 ibm->name, ret);
8558
8559 ibm_exit(ibm);
8560 return (ret < 0)? ret : 0;
8561 }
8562
8563 /* Probing */
8564
8565 static bool __pure __init tpacpi_is_fw_digit(const char c)
8566 {
8567 return (c >= '0' && c <= '9') || (c >= 'A' && c <= 'Z');
8568 }
8569
8570 /* Most models: xxyTkkWW (#.##c); Ancient 570/600 and -SL lacks (#.##c) */
8571 static bool __pure __init tpacpi_is_valid_fw_id(const char* const s,
8572 const char t)
8573 {
8574 return s && strlen(s) >= 8 &&
8575 tpacpi_is_fw_digit(s[0]) &&
8576 tpacpi_is_fw_digit(s[1]) &&
8577 s[2] == t && s[3] == 'T' &&
8578 tpacpi_is_fw_digit(s[4]) &&
8579 tpacpi_is_fw_digit(s[5]);
8580 }
8581
8582 /* returns 0 - probe ok, or < 0 - probe error.
8583 * Probe ok doesn't mean thinkpad found.
8584 * On error, kfree() cleanup on tp->* is not performed, caller must do it */
8585 static int __must_check __init get_thinkpad_model_data(
8586 struct thinkpad_id_data *tp)
8587 {
8588 const struct dmi_device *dev = NULL;
8589 char ec_fw_string[18];
8590 char const *s;
8591
8592 if (!tp)
8593 return -EINVAL;
8594
8595 memset(tp, 0, sizeof(*tp));
8596
8597 if (dmi_name_in_vendors("IBM"))
8598 tp->vendor = PCI_VENDOR_ID_IBM;
8599 else if (dmi_name_in_vendors("LENOVO"))
8600 tp->vendor = PCI_VENDOR_ID_LENOVO;
8601 else
8602 return 0;
8603
8604 s = dmi_get_system_info(DMI_BIOS_VERSION);
8605 tp->bios_version_str = kstrdup(s, GFP_KERNEL);
8606 if (s && !tp->bios_version_str)
8607 return -ENOMEM;
8608
8609 /* Really ancient ThinkPad 240X will fail this, which is fine */
8610 if (!tpacpi_is_valid_fw_id(tp->bios_version_str, 'E'))
8611 return 0;
8612
8613 tp->bios_model = tp->bios_version_str[0]
8614 | (tp->bios_version_str[1] << 8);
8615 tp->bios_release = (tp->bios_version_str[4] << 8)
8616 | tp->bios_version_str[5];
8617
8618 /*
8619 * ThinkPad T23 or newer, A31 or newer, R50e or newer,
8620 * X32 or newer, all Z series; Some models must have an
8621 * up-to-date BIOS or they will not be detected.
8622 *
8623 * See http://thinkwiki.org/wiki/List_of_DMI_IDs
8624 */
8625 while ((dev = dmi_find_device(DMI_DEV_TYPE_OEM_STRING, NULL, dev))) {
8626 if (sscanf(dev->name,
8627 "IBM ThinkPad Embedded Controller -[%17c",
8628 ec_fw_string) == 1) {
8629 ec_fw_string[sizeof(ec_fw_string) - 1] = 0;
8630 ec_fw_string[strcspn(ec_fw_string, " ]")] = 0;
8631
8632 tp->ec_version_str = kstrdup(ec_fw_string, GFP_KERNEL);
8633 if (!tp->ec_version_str)
8634 return -ENOMEM;
8635
8636 if (tpacpi_is_valid_fw_id(ec_fw_string, 'H')) {
8637 tp->ec_model = ec_fw_string[0]
8638 | (ec_fw_string[1] << 8);
8639 tp->ec_release = (ec_fw_string[4] << 8)
8640 | ec_fw_string[5];
8641 } else {
8642 pr_notice("ThinkPad firmware release %s "
8643 "doesn't match the known patterns\n",
8644 ec_fw_string);
8645 pr_notice("please report this to %s\n",
8646 TPACPI_MAIL);
8647 }
8648 break;
8649 }
8650 }
8651
8652 s = dmi_get_system_info(DMI_PRODUCT_VERSION);
8653 if (s && !(strnicmp(s, "ThinkPad", 8) && strnicmp(s, "Lenovo", 6))) {
8654 tp->model_str = kstrdup(s, GFP_KERNEL);
8655 if (!tp->model_str)
8656 return -ENOMEM;
8657 } else {
8658 s = dmi_get_system_info(DMI_BIOS_VENDOR);
8659 if (s && !(strnicmp(s, "Lenovo", 6))) {
8660 tp->model_str = kstrdup(s, GFP_KERNEL);
8661 if (!tp->model_str)
8662 return -ENOMEM;
8663 }
8664 }
8665
8666 s = dmi_get_system_info(DMI_PRODUCT_NAME);
8667 tp->nummodel_str = kstrdup(s, GFP_KERNEL);
8668 if (s && !tp->nummodel_str)
8669 return -ENOMEM;
8670
8671 return 0;
8672 }
8673
8674 static int __init probe_for_thinkpad(void)
8675 {
8676 int is_thinkpad;
8677
8678 if (acpi_disabled)
8679 return -ENODEV;
8680
8681 /* It would be dangerous to run the driver in this case */
8682 if (!tpacpi_is_ibm() && !tpacpi_is_lenovo())
8683 return -ENODEV;
8684
8685 /*
8686 * Non-ancient models have better DMI tagging, but very old models
8687 * don't. tpacpi_is_fw_known() is a cheat to help in that case.
8688 */
8689 is_thinkpad = (thinkpad_id.model_str != NULL) ||
8690 (thinkpad_id.ec_model != 0) ||
8691 tpacpi_is_fw_known();
8692
8693 /* The EC handler is required */
8694 tpacpi_acpi_handle_locate("ec", TPACPI_ACPI_EC_HID, &ec_handle);
8695 if (!ec_handle) {
8696 if (is_thinkpad)
8697 pr_err("Not yet supported ThinkPad detected!\n");
8698 return -ENODEV;
8699 }
8700
8701 if (!is_thinkpad && !force_load)
8702 return -ENODEV;
8703
8704 return 0;
8705 }
8706
8707 static void __init thinkpad_acpi_init_banner(void)
8708 {
8709 pr_info("%s v%s\n", TPACPI_DESC, TPACPI_VERSION);
8710 pr_info("%s\n", TPACPI_URL);
8711
8712 pr_info("ThinkPad BIOS %s, EC %s\n",
8713 (thinkpad_id.bios_version_str) ?
8714 thinkpad_id.bios_version_str : "unknown",
8715 (thinkpad_id.ec_version_str) ?
8716 thinkpad_id.ec_version_str : "unknown");
8717
8718 BUG_ON(!thinkpad_id.vendor);
8719
8720 if (thinkpad_id.model_str)
8721 pr_info("%s %s, model %s\n",
8722 (thinkpad_id.vendor == PCI_VENDOR_ID_IBM) ?
8723 "IBM" : ((thinkpad_id.vendor ==
8724 PCI_VENDOR_ID_LENOVO) ?
8725 "Lenovo" : "Unknown vendor"),
8726 thinkpad_id.model_str,
8727 (thinkpad_id.nummodel_str) ?
8728 thinkpad_id.nummodel_str : "unknown");
8729 }
8730
8731 /* Module init, exit, parameters */
8732
8733 static struct ibm_init_struct ibms_init[] __initdata = {
8734 {
8735 .data = &thinkpad_acpi_driver_data,
8736 },
8737 {
8738 .init = hotkey_init,
8739 .data = &hotkey_driver_data,
8740 },
8741 {
8742 .init = bluetooth_init,
8743 .data = &bluetooth_driver_data,
8744 },
8745 {
8746 .init = wan_init,
8747 .data = &wan_driver_data,
8748 },
8749 {
8750 .init = uwb_init,
8751 .data = &uwb_driver_data,
8752 },
8753 #ifdef CONFIG_THINKPAD_ACPI_VIDEO
8754 {
8755 .init = video_init,
8756 .base_procfs_mode = S_IRUSR,
8757 .data = &video_driver_data,
8758 },
8759 #endif
8760 {
8761 .init = light_init,
8762 .data = &light_driver_data,
8763 },
8764 {
8765 .init = cmos_init,
8766 .data = &cmos_driver_data,
8767 },
8768 {
8769 .init = led_init,
8770 .data = &led_driver_data,
8771 },
8772 {
8773 .init = beep_init,
8774 .data = &beep_driver_data,
8775 },
8776 {
8777 .init = thermal_init,
8778 .data = &thermal_driver_data,
8779 },
8780 {
8781 .init = brightness_init,
8782 .data = &brightness_driver_data,
8783 },
8784 {
8785 .init = volume_init,
8786 .data = &volume_driver_data,
8787 },
8788 {
8789 .init = fan_init,
8790 .data = &fan_driver_data,
8791 },
8792 };
8793
8794 static int __init set_ibm_param(const char *val, struct kernel_param *kp)
8795 {
8796 unsigned int i;
8797 struct ibm_struct *ibm;
8798
8799 if (!kp || !kp->name || !val)
8800 return -EINVAL;
8801
8802 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
8803 ibm = ibms_init[i].data;
8804 WARN_ON(ibm == NULL);
8805
8806 if (!ibm || !ibm->name)
8807 continue;
8808
8809 if (strcmp(ibm->name, kp->name) == 0 && ibm->write) {
8810 if (strlen(val) > sizeof(ibms_init[i].param) - 2)
8811 return -ENOSPC;
8812 strcpy(ibms_init[i].param, val);
8813 strcat(ibms_init[i].param, ",");
8814 return 0;
8815 }
8816 }
8817
8818 return -EINVAL;
8819 }
8820
8821 module_param(experimental, int, 0444);
8822 MODULE_PARM_DESC(experimental,
8823 "Enables experimental features when non-zero");
8824
8825 module_param_named(debug, dbg_level, uint, 0);
8826 MODULE_PARM_DESC(debug, "Sets debug level bit-mask");
8827
8828 module_param(force_load, bool, 0444);
8829 MODULE_PARM_DESC(force_load,
8830 "Attempts to load the driver even on a "
8831 "mis-identified ThinkPad when true");
8832
8833 module_param_named(fan_control, fan_control_allowed, bool, 0444);
8834 MODULE_PARM_DESC(fan_control,
8835 "Enables setting fan parameters features when true");
8836
8837 module_param_named(brightness_mode, brightness_mode, uint, 0444);
8838 MODULE_PARM_DESC(brightness_mode,
8839 "Selects brightness control strategy: "
8840 "0=auto, 1=EC, 2=UCMS, 3=EC+NVRAM");
8841
8842 module_param(brightness_enable, uint, 0444);
8843 MODULE_PARM_DESC(brightness_enable,
8844 "Enables backlight control when 1, disables when 0");
8845
8846 module_param(hotkey_report_mode, uint, 0444);
8847 MODULE_PARM_DESC(hotkey_report_mode,
8848 "used for backwards compatibility with userspace, "
8849 "see documentation");
8850
8851 #ifdef CONFIG_THINKPAD_ACPI_ALSA_SUPPORT
8852 module_param_named(volume_mode, volume_mode, uint, 0444);
8853 MODULE_PARM_DESC(volume_mode,
8854 "Selects volume control strategy: "
8855 "0=auto, 1=EC, 2=N/A, 3=EC+NVRAM");
8856
8857 module_param_named(volume_capabilities, volume_capabilities, uint, 0444);
8858 MODULE_PARM_DESC(volume_capabilities,
8859 "Selects the mixer capabilites: "
8860 "0=auto, 1=volume and mute, 2=mute only");
8861
8862 module_param_named(volume_control, volume_control_allowed, bool, 0444);
8863 MODULE_PARM_DESC(volume_control,
8864 "Enables software override for the console audio "
8865 "control when true");
8866
8867 /* ALSA module API parameters */
8868 module_param_named(index, alsa_index, int, 0444);
8869 MODULE_PARM_DESC(index, "ALSA index for the ACPI EC Mixer");
8870 module_param_named(id, alsa_id, charp, 0444);
8871 MODULE_PARM_DESC(id, "ALSA id for the ACPI EC Mixer");
8872 module_param_named(enable, alsa_enable, bool, 0444);
8873 MODULE_PARM_DESC(enable, "Enable the ALSA interface for the ACPI EC Mixer");
8874 #endif /* CONFIG_THINKPAD_ACPI_ALSA_SUPPORT */
8875
8876 #define TPACPI_PARAM(feature) \
8877 module_param_call(feature, set_ibm_param, NULL, NULL, 0); \
8878 MODULE_PARM_DESC(feature, "Simulates thinkpad-acpi procfs command " \
8879 "at module load, see documentation")
8880
8881 TPACPI_PARAM(hotkey);
8882 TPACPI_PARAM(bluetooth);
8883 TPACPI_PARAM(video);
8884 TPACPI_PARAM(light);
8885 TPACPI_PARAM(cmos);
8886 TPACPI_PARAM(led);
8887 TPACPI_PARAM(beep);
8888 TPACPI_PARAM(brightness);
8889 TPACPI_PARAM(volume);
8890 TPACPI_PARAM(fan);
8891
8892 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
8893 module_param(dbg_wlswemul, uint, 0444);
8894 MODULE_PARM_DESC(dbg_wlswemul, "Enables WLSW emulation");
8895 module_param_named(wlsw_state, tpacpi_wlsw_emulstate, bool, 0);
8896 MODULE_PARM_DESC(wlsw_state,
8897 "Initial state of the emulated WLSW switch");
8898
8899 module_param(dbg_bluetoothemul, uint, 0444);
8900 MODULE_PARM_DESC(dbg_bluetoothemul, "Enables bluetooth switch emulation");
8901 module_param_named(bluetooth_state, tpacpi_bluetooth_emulstate, bool, 0);
8902 MODULE_PARM_DESC(bluetooth_state,
8903 "Initial state of the emulated bluetooth switch");
8904
8905 module_param(dbg_wwanemul, uint, 0444);
8906 MODULE_PARM_DESC(dbg_wwanemul, "Enables WWAN switch emulation");
8907 module_param_named(wwan_state, tpacpi_wwan_emulstate, bool, 0);
8908 MODULE_PARM_DESC(wwan_state,
8909 "Initial state of the emulated WWAN switch");
8910
8911 module_param(dbg_uwbemul, uint, 0444);
8912 MODULE_PARM_DESC(dbg_uwbemul, "Enables UWB switch emulation");
8913 module_param_named(uwb_state, tpacpi_uwb_emulstate, bool, 0);
8914 MODULE_PARM_DESC(uwb_state,
8915 "Initial state of the emulated UWB switch");
8916 #endif
8917
8918 static void thinkpad_acpi_module_exit(void)
8919 {
8920 struct ibm_struct *ibm, *itmp;
8921
8922 tpacpi_lifecycle = TPACPI_LIFE_EXITING;
8923
8924 list_for_each_entry_safe_reverse(ibm, itmp,
8925 &tpacpi_all_drivers,
8926 all_drivers) {
8927 ibm_exit(ibm);
8928 }
8929
8930 dbg_printk(TPACPI_DBG_INIT, "finished subdriver exit path...\n");
8931
8932 if (tpacpi_inputdev) {
8933 if (tp_features.input_device_registered)
8934 input_unregister_device(tpacpi_inputdev);
8935 else
8936 input_free_device(tpacpi_inputdev);
8937 kfree(hotkey_keycode_map);
8938 }
8939
8940 if (tpacpi_hwmon)
8941 hwmon_device_unregister(tpacpi_hwmon);
8942
8943 if (tp_features.sensors_pdev_attrs_registered)
8944 device_remove_file(&tpacpi_sensors_pdev->dev,
8945 &dev_attr_thinkpad_acpi_pdev_name);
8946 if (tpacpi_sensors_pdev)
8947 platform_device_unregister(tpacpi_sensors_pdev);
8948 if (tpacpi_pdev)
8949 platform_device_unregister(tpacpi_pdev);
8950
8951 if (tp_features.sensors_pdrv_attrs_registered)
8952 tpacpi_remove_driver_attributes(&tpacpi_hwmon_pdriver.driver);
8953 if (tp_features.platform_drv_attrs_registered)
8954 tpacpi_remove_driver_attributes(&tpacpi_pdriver.driver);
8955
8956 if (tp_features.sensors_pdrv_registered)
8957 platform_driver_unregister(&tpacpi_hwmon_pdriver);
8958
8959 if (tp_features.platform_drv_registered)
8960 platform_driver_unregister(&tpacpi_pdriver);
8961
8962 if (proc_dir)
8963 remove_proc_entry(TPACPI_PROC_DIR, acpi_root_dir);
8964
8965 if (tpacpi_wq)
8966 destroy_workqueue(tpacpi_wq);
8967
8968 kfree(thinkpad_id.bios_version_str);
8969 kfree(thinkpad_id.ec_version_str);
8970 kfree(thinkpad_id.model_str);
8971 kfree(thinkpad_id.nummodel_str);
8972 }
8973
8974
8975 static int __init thinkpad_acpi_module_init(void)
8976 {
8977 int ret, i;
8978
8979 tpacpi_lifecycle = TPACPI_LIFE_INIT;
8980
8981 /* Parameter checking */
8982 if (hotkey_report_mode > 2)
8983 return -EINVAL;
8984
8985 /* Driver-level probe */
8986
8987 ret = get_thinkpad_model_data(&thinkpad_id);
8988 if (ret) {
8989 pr_err("unable to get DMI data: %d\n", ret);
8990 thinkpad_acpi_module_exit();
8991 return ret;
8992 }
8993 ret = probe_for_thinkpad();
8994 if (ret) {
8995 thinkpad_acpi_module_exit();
8996 return ret;
8997 }
8998
8999 /* Driver initialization */
9000
9001 thinkpad_acpi_init_banner();
9002 tpacpi_check_outdated_fw();
9003
9004 TPACPI_ACPIHANDLE_INIT(ecrd);
9005 TPACPI_ACPIHANDLE_INIT(ecwr);
9006
9007 tpacpi_wq = create_singlethread_workqueue(TPACPI_WORKQUEUE_NAME);
9008 if (!tpacpi_wq) {
9009 thinkpad_acpi_module_exit();
9010 return -ENOMEM;
9011 }
9012
9013 proc_dir = proc_mkdir(TPACPI_PROC_DIR, acpi_root_dir);
9014 if (!proc_dir) {
9015 pr_err("unable to create proc dir " TPACPI_PROC_DIR "\n");
9016 thinkpad_acpi_module_exit();
9017 return -ENODEV;
9018 }
9019
9020 ret = platform_driver_register(&tpacpi_pdriver);
9021 if (ret) {
9022 pr_err("unable to register main platform driver\n");
9023 thinkpad_acpi_module_exit();
9024 return ret;
9025 }
9026 tp_features.platform_drv_registered = 1;
9027
9028 ret = platform_driver_register(&tpacpi_hwmon_pdriver);
9029 if (ret) {
9030 pr_err("unable to register hwmon platform driver\n");
9031 thinkpad_acpi_module_exit();
9032 return ret;
9033 }
9034 tp_features.sensors_pdrv_registered = 1;
9035
9036 ret = tpacpi_create_driver_attributes(&tpacpi_pdriver.driver);
9037 if (!ret) {
9038 tp_features.platform_drv_attrs_registered = 1;
9039 ret = tpacpi_create_driver_attributes(
9040 &tpacpi_hwmon_pdriver.driver);
9041 }
9042 if (ret) {
9043 pr_err("unable to create sysfs driver attributes\n");
9044 thinkpad_acpi_module_exit();
9045 return ret;
9046 }
9047 tp_features.sensors_pdrv_attrs_registered = 1;
9048
9049
9050 /* Device initialization */
9051 tpacpi_pdev = platform_device_register_simple(TPACPI_DRVR_NAME, -1,
9052 NULL, 0);
9053 if (IS_ERR(tpacpi_pdev)) {
9054 ret = PTR_ERR(tpacpi_pdev);
9055 tpacpi_pdev = NULL;
9056 pr_err("unable to register platform device\n");
9057 thinkpad_acpi_module_exit();
9058 return ret;
9059 }
9060 tpacpi_sensors_pdev = platform_device_register_simple(
9061 TPACPI_HWMON_DRVR_NAME,
9062 -1, NULL, 0);
9063 if (IS_ERR(tpacpi_sensors_pdev)) {
9064 ret = PTR_ERR(tpacpi_sensors_pdev);
9065 tpacpi_sensors_pdev = NULL;
9066 pr_err("unable to register hwmon platform device\n");
9067 thinkpad_acpi_module_exit();
9068 return ret;
9069 }
9070 ret = device_create_file(&tpacpi_sensors_pdev->dev,
9071 &dev_attr_thinkpad_acpi_pdev_name);
9072 if (ret) {
9073 pr_err("unable to create sysfs hwmon device attributes\n");
9074 thinkpad_acpi_module_exit();
9075 return ret;
9076 }
9077 tp_features.sensors_pdev_attrs_registered = 1;
9078 tpacpi_hwmon = hwmon_device_register(&tpacpi_sensors_pdev->dev);
9079 if (IS_ERR(tpacpi_hwmon)) {
9080 ret = PTR_ERR(tpacpi_hwmon);
9081 tpacpi_hwmon = NULL;
9082 pr_err("unable to register hwmon device\n");
9083 thinkpad_acpi_module_exit();
9084 return ret;
9085 }
9086 mutex_init(&tpacpi_inputdev_send_mutex);
9087 tpacpi_inputdev = input_allocate_device();
9088 if (!tpacpi_inputdev) {
9089 pr_err("unable to allocate input device\n");
9090 thinkpad_acpi_module_exit();
9091 return -ENOMEM;
9092 } else {
9093 /* Prepare input device, but don't register */
9094 tpacpi_inputdev->name = "ThinkPad Extra Buttons";
9095 tpacpi_inputdev->phys = TPACPI_DRVR_NAME "/input0";
9096 tpacpi_inputdev->id.bustype = BUS_HOST;
9097 tpacpi_inputdev->id.vendor = thinkpad_id.vendor;
9098 tpacpi_inputdev->id.product = TPACPI_HKEY_INPUT_PRODUCT;
9099 tpacpi_inputdev->id.version = TPACPI_HKEY_INPUT_VERSION;
9100 tpacpi_inputdev->dev.parent = &tpacpi_pdev->dev;
9101 }
9102
9103 /* Init subdriver dependencies */
9104 tpacpi_detect_brightness_capabilities();
9105
9106 /* Init subdrivers */
9107 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
9108 ret = ibm_init(&ibms_init[i]);
9109 if (ret >= 0 && *ibms_init[i].param)
9110 ret = ibms_init[i].data->write(ibms_init[i].param);
9111 if (ret < 0) {
9112 thinkpad_acpi_module_exit();
9113 return ret;
9114 }
9115 }
9116
9117 tpacpi_lifecycle = TPACPI_LIFE_RUNNING;
9118
9119 ret = input_register_device(tpacpi_inputdev);
9120 if (ret < 0) {
9121 pr_err("unable to register input device\n");
9122 thinkpad_acpi_module_exit();
9123 return ret;
9124 } else {
9125 tp_features.input_device_registered = 1;
9126 }
9127
9128 return 0;
9129 }
9130
9131 MODULE_ALIAS(TPACPI_DRVR_SHORTNAME);
9132
9133 /*
9134 * This will autoload the driver in almost every ThinkPad
9135 * in widespread use.
9136 *
9137 * Only _VERY_ old models, like the 240, 240x and 570 lack
9138 * the HKEY event interface.
9139 */
9140 MODULE_DEVICE_TABLE(acpi, ibm_htk_device_ids);
9141
9142 /*
9143 * DMI matching for module autoloading
9144 *
9145 * See http://thinkwiki.org/wiki/List_of_DMI_IDs
9146 * See http://thinkwiki.org/wiki/BIOS_Upgrade_Downloads
9147 *
9148 * Only models listed in thinkwiki will be supported, so add yours
9149 * if it is not there yet.
9150 */
9151 #define IBM_BIOS_MODULE_ALIAS(__type) \
9152 MODULE_ALIAS("dmi:bvnIBM:bvr" __type "ET??WW*")
9153
9154 /* Ancient thinkpad BIOSes have to be identified by
9155 * BIOS type or model number, and there are far less
9156 * BIOS types than model numbers... */
9157 IBM_BIOS_MODULE_ALIAS("I[MU]"); /* 570, 570e */
9158
9159 MODULE_AUTHOR("Borislav Deianov <borislav@users.sf.net>");
9160 MODULE_AUTHOR("Henrique de Moraes Holschuh <hmh@hmh.eng.br>");
9161 MODULE_DESCRIPTION(TPACPI_DESC);
9162 MODULE_VERSION(TPACPI_VERSION);
9163 MODULE_LICENSE("GPL");
9164
9165 module_init(thinkpad_acpi_module_init);
9166 module_exit(thinkpad_acpi_module_exit);
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