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thinkpad-acpi: expose module parameters
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / platform / x86 / thinkpad_acpi.c
blob4b96a961b7e017aec6060dddca551074c3676459
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 TPACPI_VERSION "0.23"
25 #define TPACPI_SYSFS_VERSION 0x020600
26
27 /*
28 * Changelog:
29 * 2007-10-20 changelog trimmed down
30 *
31 * 2007-03-27 0.14 renamed to thinkpad_acpi and moved to
32 * drivers/misc.
33 *
34 * 2006-11-22 0.13 new maintainer
35 * changelog now lives in git commit history, and will
36 * not be updated further in-file.
37 *
38 * 2005-03-17 0.11 support for 600e, 770x
39 * thanks to Jamie Lentin <lentinj@dial.pipex.com>
40 *
41 * 2005-01-16 0.9 use MODULE_VERSION
42 * thanks to Henrik Brix Andersen <brix@gentoo.org>
43 * fix parameter passing on module loading
44 * thanks to Rusty Russell <rusty@rustcorp.com.au>
45 * thanks to Jim Radford <radford@blackbean.org>
46 * 2004-11-08 0.8 fix init error case, don't return from a macro
47 * thanks to Chris Wright <chrisw@osdl.org>
48 */
49
50 #include <linux/kernel.h>
51 #include <linux/module.h>
52 #include <linux/init.h>
53 #include <linux/types.h>
54 #include <linux/string.h>
55 #include <linux/list.h>
56 #include <linux/mutex.h>
57 #include <linux/sched.h>
58 #include <linux/kthread.h>
59 #include <linux/freezer.h>
60 #include <linux/delay.h>
61
62 #include <linux/nvram.h>
63 #include <linux/proc_fs.h>
64 #include <linux/sysfs.h>
65 #include <linux/backlight.h>
66 #include <linux/fb.h>
67 #include <linux/platform_device.h>
68 #include <linux/hwmon.h>
69 #include <linux/hwmon-sysfs.h>
70 #include <linux/input.h>
71 #include <linux/leds.h>
72 #include <linux/rfkill.h>
73 #include <asm/uaccess.h>
74
75 #include <linux/dmi.h>
76 #include <linux/jiffies.h>
77 #include <linux/workqueue.h>
78
79 #include <acpi/acpi_drivers.h>
80
81 #include <linux/pci_ids.h>
82
83
84 /* ThinkPad CMOS commands */
85 #define TP_CMOS_VOLUME_DOWN 0
86 #define TP_CMOS_VOLUME_UP 1
87 #define TP_CMOS_VOLUME_MUTE 2
88 #define TP_CMOS_BRIGHTNESS_UP 4
89 #define TP_CMOS_BRIGHTNESS_DOWN 5
90 #define TP_CMOS_THINKLIGHT_ON 12
91 #define TP_CMOS_THINKLIGHT_OFF 13
92
93 /* NVRAM Addresses */
94 enum tp_nvram_addr {
95 TP_NVRAM_ADDR_HK2 = 0x57,
96 TP_NVRAM_ADDR_THINKLIGHT = 0x58,
97 TP_NVRAM_ADDR_VIDEO = 0x59,
98 TP_NVRAM_ADDR_BRIGHTNESS = 0x5e,
99 TP_NVRAM_ADDR_MIXER = 0x60,
100 };
101
102 /* NVRAM bit masks */
103 enum {
104 TP_NVRAM_MASK_HKT_THINKPAD = 0x08,
105 TP_NVRAM_MASK_HKT_ZOOM = 0x20,
106 TP_NVRAM_MASK_HKT_DISPLAY = 0x40,
107 TP_NVRAM_MASK_HKT_HIBERNATE = 0x80,
108 TP_NVRAM_MASK_THINKLIGHT = 0x10,
109 TP_NVRAM_MASK_HKT_DISPEXPND = 0x30,
110 TP_NVRAM_MASK_HKT_BRIGHTNESS = 0x20,
111 TP_NVRAM_MASK_LEVEL_BRIGHTNESS = 0x0f,
112 TP_NVRAM_POS_LEVEL_BRIGHTNESS = 0,
113 TP_NVRAM_MASK_MUTE = 0x40,
114 TP_NVRAM_MASK_HKT_VOLUME = 0x80,
115 TP_NVRAM_MASK_LEVEL_VOLUME = 0x0f,
116 TP_NVRAM_POS_LEVEL_VOLUME = 0,
117 };
118
119 /* ACPI HIDs */
120 #define TPACPI_ACPI_HKEY_HID "IBM0068"
121
122 /* Input IDs */
123 #define TPACPI_HKEY_INPUT_PRODUCT 0x5054 /* "TP" */
124 #define TPACPI_HKEY_INPUT_VERSION 0x4101
125
126 /* ACPI \WGSV commands */
127 enum {
128 TP_ACPI_WGSV_GET_STATE = 0x01, /* Get state information */
129 TP_ACPI_WGSV_PWR_ON_ON_RESUME = 0x02, /* Resume WWAN powered on */
130 TP_ACPI_WGSV_PWR_OFF_ON_RESUME = 0x03, /* Resume WWAN powered off */
131 TP_ACPI_WGSV_SAVE_STATE = 0x04, /* Save state for S4/S5 */
132 };
133
134 /* TP_ACPI_WGSV_GET_STATE bits */
135 enum {
136 TP_ACPI_WGSV_STATE_WWANEXIST = 0x0001, /* WWAN hw available */
137 TP_ACPI_WGSV_STATE_WWANPWR = 0x0002, /* WWAN radio enabled */
138 TP_ACPI_WGSV_STATE_WWANPWRRES = 0x0004, /* WWAN state at resume */
139 TP_ACPI_WGSV_STATE_WWANBIOSOFF = 0x0008, /* WWAN disabled in BIOS */
140 TP_ACPI_WGSV_STATE_BLTHEXIST = 0x0001, /* BLTH hw available */
141 TP_ACPI_WGSV_STATE_BLTHPWR = 0x0002, /* BLTH radio enabled */
142 TP_ACPI_WGSV_STATE_BLTHPWRRES = 0x0004, /* BLTH state at resume */
143 TP_ACPI_WGSV_STATE_BLTHBIOSOFF = 0x0008, /* BLTH disabled in BIOS */
144 TP_ACPI_WGSV_STATE_UWBEXIST = 0x0010, /* UWB hw available */
145 TP_ACPI_WGSV_STATE_UWBPWR = 0x0020, /* UWB radio enabled */
146 };
147
148 /* HKEY events */
149 enum tpacpi_hkey_event_t {
150 /* Hotkey-related */
151 TP_HKEY_EV_HOTKEY_BASE = 0x1001, /* first hotkey (FN+F1) */
152 TP_HKEY_EV_BRGHT_UP = 0x1010, /* Brightness up */
153 TP_HKEY_EV_BRGHT_DOWN = 0x1011, /* Brightness down */
154 TP_HKEY_EV_VOL_UP = 0x1015, /* Volume up or unmute */
155 TP_HKEY_EV_VOL_DOWN = 0x1016, /* Volume down or unmute */
156 TP_HKEY_EV_VOL_MUTE = 0x1017, /* Mixer output mute */
157
158 /* Reasons for waking up from S3/S4 */
159 TP_HKEY_EV_WKUP_S3_UNDOCK = 0x2304, /* undock requested, S3 */
160 TP_HKEY_EV_WKUP_S4_UNDOCK = 0x2404, /* undock requested, S4 */
161 TP_HKEY_EV_WKUP_S3_BAYEJ = 0x2305, /* bay ejection req, S3 */
162 TP_HKEY_EV_WKUP_S4_BAYEJ = 0x2405, /* bay ejection req, S4 */
163 TP_HKEY_EV_WKUP_S3_BATLOW = 0x2313, /* battery empty, S3 */
164 TP_HKEY_EV_WKUP_S4_BATLOW = 0x2413, /* battery empty, S4 */
165
166 /* Auto-sleep after eject request */
167 TP_HKEY_EV_BAYEJ_ACK = 0x3003, /* bay ejection complete */
168 TP_HKEY_EV_UNDOCK_ACK = 0x4003, /* undock complete */
169
170 /* Misc bay events */
171 TP_HKEY_EV_OPTDRV_EJ = 0x3006, /* opt. drive tray ejected */
172
173 /* User-interface events */
174 TP_HKEY_EV_LID_CLOSE = 0x5001, /* laptop lid closed */
175 TP_HKEY_EV_LID_OPEN = 0x5002, /* laptop lid opened */
176 TP_HKEY_EV_TABLET_TABLET = 0x5009, /* tablet swivel up */
177 TP_HKEY_EV_TABLET_NOTEBOOK = 0x500a, /* tablet swivel down */
178 TP_HKEY_EV_PEN_INSERTED = 0x500b, /* tablet pen inserted */
179 TP_HKEY_EV_PEN_REMOVED = 0x500c, /* tablet pen removed */
180 TP_HKEY_EV_BRGHT_CHANGED = 0x5010, /* backlight control event */
181
182 /* Thermal events */
183 TP_HKEY_EV_ALARM_BAT_HOT = 0x6011, /* battery too hot */
184 TP_HKEY_EV_ALARM_BAT_XHOT = 0x6012, /* battery critically hot */
185 TP_HKEY_EV_ALARM_SENSOR_HOT = 0x6021, /* sensor too hot */
186 TP_HKEY_EV_ALARM_SENSOR_XHOT = 0x6022, /* sensor critically hot */
187 TP_HKEY_EV_THM_TABLE_CHANGED = 0x6030, /* thermal table changed */
188
189 /* Misc */
190 TP_HKEY_EV_RFKILL_CHANGED = 0x7000, /* rfkill switch changed */
191 };
192
193 /****************************************************************************
194 * Main driver
195 */
196
197 #define TPACPI_NAME "thinkpad"
198 #define TPACPI_DESC "ThinkPad ACPI Extras"
199 #define TPACPI_FILE TPACPI_NAME "_acpi"
200 #define TPACPI_URL "http://ibm-acpi.sf.net/"
201 #define TPACPI_MAIL "ibm-acpi-devel@lists.sourceforge.net"
202
203 #define TPACPI_PROC_DIR "ibm"
204 #define TPACPI_ACPI_EVENT_PREFIX "ibm"
205 #define TPACPI_DRVR_NAME TPACPI_FILE
206 #define TPACPI_DRVR_SHORTNAME "tpacpi"
207 #define TPACPI_HWMON_DRVR_NAME TPACPI_NAME "_hwmon"
208
209 #define TPACPI_NVRAM_KTHREAD_NAME "ktpacpi_nvramd"
210 #define TPACPI_WORKQUEUE_NAME "ktpacpid"
211
212 #define TPACPI_MAX_ACPI_ARGS 3
213
214 /* printk headers */
215 #define TPACPI_LOG TPACPI_FILE ": "
216 #define TPACPI_EMERG KERN_EMERG TPACPI_LOG
217 #define TPACPI_ALERT KERN_ALERT TPACPI_LOG
218 #define TPACPI_CRIT KERN_CRIT TPACPI_LOG
219 #define TPACPI_ERR KERN_ERR TPACPI_LOG
220 #define TPACPI_WARN KERN_WARNING TPACPI_LOG
221 #define TPACPI_NOTICE KERN_NOTICE TPACPI_LOG
222 #define TPACPI_INFO KERN_INFO TPACPI_LOG
223 #define TPACPI_DEBUG KERN_DEBUG TPACPI_LOG
224
225 /* Debugging printk groups */
226 #define TPACPI_DBG_ALL 0xffff
227 #define TPACPI_DBG_DISCLOSETASK 0x8000
228 #define TPACPI_DBG_INIT 0x0001
229 #define TPACPI_DBG_EXIT 0x0002
230 #define TPACPI_DBG_RFKILL 0x0004
231 #define TPACPI_DBG_HKEY 0x0008
232 #define TPACPI_DBG_FAN 0x0010
233 #define TPACPI_DBG_BRGHT 0x0020
234
235 #define onoff(status, bit) ((status) & (1 << (bit)) ? "on" : "off")
236 #define enabled(status, bit) ((status) & (1 << (bit)) ? "enabled" : "disabled")
237 #define strlencmp(a, b) (strncmp((a), (b), strlen(b)))
238
239
240 /****************************************************************************
241 * Driver-wide structs and misc. variables
242 */
243
244 struct ibm_struct;
245
246 struct tp_acpi_drv_struct {
247 const struct acpi_device_id *hid;
248 struct acpi_driver *driver;
249
250 void (*notify) (struct ibm_struct *, u32);
251 acpi_handle *handle;
252 u32 type;
253 struct acpi_device *device;
254 };
255
256 struct ibm_struct {
257 char *name;
258
259 int (*read) (char *);
260 int (*write) (char *);
261 void (*exit) (void);
262 void (*resume) (void);
263 void (*suspend) (pm_message_t state);
264 void (*shutdown) (void);
265
266 struct list_head all_drivers;
267
268 struct tp_acpi_drv_struct *acpi;
269
270 struct {
271 u8 acpi_driver_registered:1;
272 u8 acpi_notify_installed:1;
273 u8 proc_created:1;
274 u8 init_called:1;
275 u8 experimental:1;
276 } flags;
277 };
278
279 struct ibm_init_struct {
280 char param[32];
281
282 int (*init) (struct ibm_init_struct *);
283 struct ibm_struct *data;
284 };
285
286 static struct {
287 u32 bluetooth:1;
288 u32 hotkey:1;
289 u32 hotkey_mask:1;
290 u32 hotkey_wlsw:1;
291 u32 hotkey_tablet:1;
292 u32 light:1;
293 u32 light_status:1;
294 u32 bright_16levels:1;
295 u32 bright_acpimode:1;
296 u32 wan:1;
297 u32 uwb:1;
298 u32 fan_ctrl_status_undef:1;
299 u32 second_fan:1;
300 u32 beep_needs_two_args:1;
301 u32 input_device_registered:1;
302 u32 platform_drv_registered:1;
303 u32 platform_drv_attrs_registered:1;
304 u32 sensors_pdrv_registered:1;
305 u32 sensors_pdrv_attrs_registered:1;
306 u32 sensors_pdev_attrs_registered:1;
307 u32 hotkey_poll_active:1;
308 } tp_features;
309
310 static struct {
311 u16 hotkey_mask_ff:1;
312 } tp_warned;
313
314 struct thinkpad_id_data {
315 unsigned int vendor; /* ThinkPad vendor:
316 * PCI_VENDOR_ID_IBM/PCI_VENDOR_ID_LENOVO */
317
318 char *bios_version_str; /* Something like 1ZET51WW (1.03z) */
319 char *ec_version_str; /* Something like 1ZHT51WW-1.04a */
320
321 u16 bios_model; /* 1Y = 0x5931, 0 = unknown */
322 u16 ec_model;
323 u16 bios_release; /* 1ZETK1WW = 0x314b, 0 = unknown */
324 u16 ec_release;
325
326 char *model_str; /* ThinkPad T43 */
327 char *nummodel_str; /* 9384A9C for a 9384-A9C model */
328 };
329 static struct thinkpad_id_data thinkpad_id;
330
331 static enum {
332 TPACPI_LIFE_INIT = 0,
333 TPACPI_LIFE_RUNNING,
334 TPACPI_LIFE_EXITING,
335 } tpacpi_lifecycle;
336
337 static int experimental;
338 static u32 dbg_level;
339
340 static struct workqueue_struct *tpacpi_wq;
341
342 enum led_status_t {
343 TPACPI_LED_OFF = 0,
344 TPACPI_LED_ON,
345 TPACPI_LED_BLINK,
346 };
347
348 /* Special LED class that can defer work */
349 struct tpacpi_led_classdev {
350 struct led_classdev led_classdev;
351 struct work_struct work;
352 enum led_status_t new_state;
353 unsigned int led;
354 };
355
356 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
357 static int dbg_wlswemul;
358 static int tpacpi_wlsw_emulstate;
359 static int dbg_bluetoothemul;
360 static int tpacpi_bluetooth_emulstate;
361 static int dbg_wwanemul;
362 static int tpacpi_wwan_emulstate;
363 static int dbg_uwbemul;
364 static int tpacpi_uwb_emulstate;
365 #endif
366
367
368 /*************************************************************************
369 * Debugging helpers
370 */
371
372 #define dbg_printk(a_dbg_level, format, arg...) \
373 do { if (dbg_level & (a_dbg_level)) \
374 printk(TPACPI_DEBUG "%s: " format, __func__ , ## arg); \
375 } while (0)
376
377 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
378 #define vdbg_printk dbg_printk
379 static const char *str_supported(int is_supported);
380 #else
381 #define vdbg_printk(a_dbg_level, format, arg...) \
382 do { } while (0)
383 #endif
384
385 static void tpacpi_log_usertask(const char * const what)
386 {
387 printk(TPACPI_DEBUG "%s: access by process with PID %d\n",
388 what, task_tgid_vnr(current));
389 }
390
391 #define tpacpi_disclose_usertask(what, format, arg...) \
392 do { \
393 if (unlikely( \
394 (dbg_level & TPACPI_DBG_DISCLOSETASK) && \
395 (tpacpi_lifecycle == TPACPI_LIFE_RUNNING))) { \
396 printk(TPACPI_DEBUG "%s: PID %d: " format, \
397 what, task_tgid_vnr(current), ## arg); \
398 } \
399 } while (0)
400
401 /*
402 * Quirk handling helpers
403 *
404 * ThinkPad IDs and versions seen in the field so far
405 * are two-characters from the set [0-9A-Z], i.e. base 36.
406 *
407 * We use values well outside that range as specials.
408 */
409
410 #define TPACPI_MATCH_ANY 0xffffU
411 #define TPACPI_MATCH_UNKNOWN 0U
412
413 /* TPID('1', 'Y') == 0x5931 */
414 #define TPID(__c1, __c2) (((__c2) << 8) | (__c1))
415
416 #define TPACPI_Q_IBM(__id1, __id2, __quirk) \
417 { .vendor = PCI_VENDOR_ID_IBM, \
418 .bios = TPID(__id1, __id2), \
419 .ec = TPACPI_MATCH_ANY, \
420 .quirks = (__quirk) }
421
422 #define TPACPI_Q_LNV(__id1, __id2, __quirk) \
423 { .vendor = PCI_VENDOR_ID_LENOVO, \
424 .bios = TPID(__id1, __id2), \
425 .ec = TPACPI_MATCH_ANY, \
426 .quirks = (__quirk) }
427
428 struct tpacpi_quirk {
429 unsigned int vendor;
430 u16 bios;
431 u16 ec;
432 unsigned long quirks;
433 };
434
435 /**
436 * tpacpi_check_quirks() - search BIOS/EC version on a list
437 * @qlist: array of &struct tpacpi_quirk
438 * @qlist_size: number of elements in @qlist
439 *
440 * Iterates over a quirks list until one is found that matches the
441 * ThinkPad's vendor, BIOS and EC model.
442 *
443 * Returns 0 if nothing matches, otherwise returns the quirks field of
444 * the matching &struct tpacpi_quirk entry.
445 *
446 * The match criteria is: vendor, ec and bios much match.
447 */
448 static unsigned long __init tpacpi_check_quirks(
449 const struct tpacpi_quirk *qlist,
450 unsigned int qlist_size)
451 {
452 while (qlist_size) {
453 if ((qlist->vendor == thinkpad_id.vendor ||
454 qlist->vendor == TPACPI_MATCH_ANY) &&
455 (qlist->bios == thinkpad_id.bios_model ||
456 qlist->bios == TPACPI_MATCH_ANY) &&
457 (qlist->ec == thinkpad_id.ec_model ||
458 qlist->ec == TPACPI_MATCH_ANY))
459 return qlist->quirks;
460
461 qlist_size--;
462 qlist++;
463 }
464 return 0;
465 }
466
467
468 /****************************************************************************
469 ****************************************************************************
470 *
471 * ACPI Helpers and device model
472 *
473 ****************************************************************************
474 ****************************************************************************/
475
476 /*************************************************************************
477 * ACPI basic handles
478 */
479
480 static acpi_handle root_handle;
481
482 #define TPACPI_HANDLE(object, parent, paths...) \
483 static acpi_handle object##_handle; \
484 static acpi_handle *object##_parent = &parent##_handle; \
485 static char *object##_path; \
486 static char *object##_paths[] = { paths }
487
488 TPACPI_HANDLE(ec, root, "\\_SB.PCI0.ISA.EC0", /* 240, 240x */
489 "\\_SB.PCI.ISA.EC", /* 570 */
490 "\\_SB.PCI0.ISA0.EC0", /* 600e/x, 770e, 770x */
491 "\\_SB.PCI0.ISA.EC", /* A21e, A2xm/p, T20-22, X20-21 */
492 "\\_SB.PCI0.AD4S.EC0", /* i1400, R30 */
493 "\\_SB.PCI0.ICH3.EC0", /* R31 */
494 "\\_SB.PCI0.LPC.EC", /* all others */
495 );
496
497 TPACPI_HANDLE(ecrd, ec, "ECRD"); /* 570 */
498 TPACPI_HANDLE(ecwr, ec, "ECWR"); /* 570 */
499
500 TPACPI_HANDLE(cmos, root, "\\UCMS", /* R50, R50e, R50p, R51, */
501 /* T4x, X31, X40 */
502 "\\CMOS", /* A3x, G4x, R32, T23, T30, X22-24, X30 */
503 "\\CMS", /* R40, R40e */
504 ); /* all others */
505
506 TPACPI_HANDLE(hkey, ec, "\\_SB.HKEY", /* 600e/x, 770e, 770x */
507 "^HKEY", /* R30, R31 */
508 "HKEY", /* all others */
509 ); /* 570 */
510
511 TPACPI_HANDLE(vid, root, "\\_SB.PCI.AGP.VGA", /* 570 */
512 "\\_SB.PCI0.AGP0.VID0", /* 600e/x, 770x */
513 "\\_SB.PCI0.VID0", /* 770e */
514 "\\_SB.PCI0.VID", /* A21e, G4x, R50e, X30, X40 */
515 "\\_SB.PCI0.AGP.VID", /* all others */
516 ); /* R30, R31 */
517
518
519 /*************************************************************************
520 * ACPI helpers
521 */
522
523 static int acpi_evalf(acpi_handle handle,
524 void *res, char *method, char *fmt, ...)
525 {
526 char *fmt0 = fmt;
527 struct acpi_object_list params;
528 union acpi_object in_objs[TPACPI_MAX_ACPI_ARGS];
529 struct acpi_buffer result, *resultp;
530 union acpi_object out_obj;
531 acpi_status status;
532 va_list ap;
533 char res_type;
534 int success;
535 int quiet;
536
537 if (!*fmt) {
538 printk(TPACPI_ERR "acpi_evalf() called with empty format\n");
539 return 0;
540 }
541
542 if (*fmt == 'q') {
543 quiet = 1;
544 fmt++;
545 } else
546 quiet = 0;
547
548 res_type = *(fmt++);
549
550 params.count = 0;
551 params.pointer = &in_objs[0];
552
553 va_start(ap, fmt);
554 while (*fmt) {
555 char c = *(fmt++);
556 switch (c) {
557 case 'd': /* int */
558 in_objs[params.count].integer.value = va_arg(ap, int);
559 in_objs[params.count++].type = ACPI_TYPE_INTEGER;
560 break;
561 /* add more types as needed */
562 default:
563 printk(TPACPI_ERR "acpi_evalf() called "
564 "with invalid format character '%c'\n", c);
565 return 0;
566 }
567 }
568 va_end(ap);
569
570 if (res_type != 'v') {
571 result.length = sizeof(out_obj);
572 result.pointer = &out_obj;
573 resultp = &result;
574 } else
575 resultp = NULL;
576
577 status = acpi_evaluate_object(handle, method, &params, resultp);
578
579 switch (res_type) {
580 case 'd': /* int */
581 if (res)
582 *(int *)res = out_obj.integer.value;
583 success = status == AE_OK && out_obj.type == ACPI_TYPE_INTEGER;
584 break;
585 case 'v': /* void */
586 success = status == AE_OK;
587 break;
588 /* add more types as needed */
589 default:
590 printk(TPACPI_ERR "acpi_evalf() called "
591 "with invalid format character '%c'\n", res_type);
592 return 0;
593 }
594
595 if (!success && !quiet)
596 printk(TPACPI_ERR "acpi_evalf(%s, %s, ...) failed: %d\n",
597 method, fmt0, status);
598
599 return success;
600 }
601
602 static int acpi_ec_read(int i, u8 *p)
603 {
604 int v;
605
606 if (ecrd_handle) {
607 if (!acpi_evalf(ecrd_handle, &v, NULL, "dd", i))
608 return 0;
609 *p = v;
610 } else {
611 if (ec_read(i, p) < 0)
612 return 0;
613 }
614
615 return 1;
616 }
617
618 static int acpi_ec_write(int i, u8 v)
619 {
620 if (ecwr_handle) {
621 if (!acpi_evalf(ecwr_handle, NULL, NULL, "vdd", i, v))
622 return 0;
623 } else {
624 if (ec_write(i, v) < 0)
625 return 0;
626 }
627
628 return 1;
629 }
630
631 static int issue_thinkpad_cmos_command(int cmos_cmd)
632 {
633 if (!cmos_handle)
634 return -ENXIO;
635
636 if (!acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd))
637 return -EIO;
638
639 return 0;
640 }
641
642 /*************************************************************************
643 * ACPI device model
644 */
645
646 #define TPACPI_ACPIHANDLE_INIT(object) \
647 drv_acpi_handle_init(#object, &object##_handle, *object##_parent, \
648 object##_paths, ARRAY_SIZE(object##_paths), &object##_path)
649
650 static void drv_acpi_handle_init(char *name,
651 acpi_handle *handle, acpi_handle parent,
652 char **paths, int num_paths, char **path)
653 {
654 int i;
655 acpi_status status;
656
657 vdbg_printk(TPACPI_DBG_INIT, "trying to locate ACPI handle for %s\n",
658 name);
659
660 for (i = 0; i < num_paths; i++) {
661 status = acpi_get_handle(parent, paths[i], handle);
662 if (ACPI_SUCCESS(status)) {
663 *path = paths[i];
664 dbg_printk(TPACPI_DBG_INIT,
665 "Found ACPI handle %s for %s\n",
666 *path, name);
667 return;
668 }
669 }
670
671 vdbg_printk(TPACPI_DBG_INIT, "ACPI handle for %s not found\n",
672 name);
673 *handle = NULL;
674 }
675
676 static void dispatch_acpi_notify(acpi_handle handle, u32 event, void *data)
677 {
678 struct ibm_struct *ibm = data;
679
680 if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
681 return;
682
683 if (!ibm || !ibm->acpi || !ibm->acpi->notify)
684 return;
685
686 ibm->acpi->notify(ibm, event);
687 }
688
689 static int __init setup_acpi_notify(struct ibm_struct *ibm)
690 {
691 acpi_status status;
692 int rc;
693
694 BUG_ON(!ibm->acpi);
695
696 if (!*ibm->acpi->handle)
697 return 0;
698
699 vdbg_printk(TPACPI_DBG_INIT,
700 "setting up ACPI notify for %s\n", ibm->name);
701
702 rc = acpi_bus_get_device(*ibm->acpi->handle, &ibm->acpi->device);
703 if (rc < 0) {
704 printk(TPACPI_ERR "acpi_bus_get_device(%s) failed: %d\n",
705 ibm->name, rc);
706 return -ENODEV;
707 }
708
709 ibm->acpi->device->driver_data = ibm;
710 sprintf(acpi_device_class(ibm->acpi->device), "%s/%s",
711 TPACPI_ACPI_EVENT_PREFIX,
712 ibm->name);
713
714 status = acpi_install_notify_handler(*ibm->acpi->handle,
715 ibm->acpi->type, dispatch_acpi_notify, ibm);
716 if (ACPI_FAILURE(status)) {
717 if (status == AE_ALREADY_EXISTS) {
718 printk(TPACPI_NOTICE
719 "another device driver is already "
720 "handling %s events\n", ibm->name);
721 } else {
722 printk(TPACPI_ERR
723 "acpi_install_notify_handler(%s) failed: %d\n",
724 ibm->name, status);
725 }
726 return -ENODEV;
727 }
728 ibm->flags.acpi_notify_installed = 1;
729 return 0;
730 }
731
732 static int __init tpacpi_device_add(struct acpi_device *device)
733 {
734 return 0;
735 }
736
737 static int __init register_tpacpi_subdriver(struct ibm_struct *ibm)
738 {
739 int rc;
740
741 dbg_printk(TPACPI_DBG_INIT,
742 "registering %s as an ACPI driver\n", ibm->name);
743
744 BUG_ON(!ibm->acpi);
745
746 ibm->acpi->driver = kzalloc(sizeof(struct acpi_driver), GFP_KERNEL);
747 if (!ibm->acpi->driver) {
748 printk(TPACPI_ERR
749 "failed to allocate memory for ibm->acpi->driver\n");
750 return -ENOMEM;
751 }
752
753 sprintf(ibm->acpi->driver->name, "%s_%s", TPACPI_NAME, ibm->name);
754 ibm->acpi->driver->ids = ibm->acpi->hid;
755
756 ibm->acpi->driver->ops.add = &tpacpi_device_add;
757
758 rc = acpi_bus_register_driver(ibm->acpi->driver);
759 if (rc < 0) {
760 printk(TPACPI_ERR "acpi_bus_register_driver(%s) failed: %d\n",
761 ibm->name, rc);
762 kfree(ibm->acpi->driver);
763 ibm->acpi->driver = NULL;
764 } else if (!rc)
765 ibm->flags.acpi_driver_registered = 1;
766
767 return rc;
768 }
769
770
771 /****************************************************************************
772 ****************************************************************************
773 *
774 * Procfs Helpers
775 *
776 ****************************************************************************
777 ****************************************************************************/
778
779 static int dispatch_procfs_read(char *page, char **start, off_t off,
780 int count, int *eof, void *data)
781 {
782 struct ibm_struct *ibm = data;
783 int len;
784
785 if (!ibm || !ibm->read)
786 return -EINVAL;
787
788 len = ibm->read(page);
789 if (len < 0)
790 return len;
791
792 if (len <= off + count)
793 *eof = 1;
794 *start = page + off;
795 len -= off;
796 if (len > count)
797 len = count;
798 if (len < 0)
799 len = 0;
800
801 return len;
802 }
803
804 static int dispatch_procfs_write(struct file *file,
805 const char __user *userbuf,
806 unsigned long count, void *data)
807 {
808 struct ibm_struct *ibm = data;
809 char *kernbuf;
810 int ret;
811
812 if (!ibm || !ibm->write)
813 return -EINVAL;
814 if (count > PAGE_SIZE - 2)
815 return -EINVAL;
816
817 kernbuf = kmalloc(count + 2, GFP_KERNEL);
818 if (!kernbuf)
819 return -ENOMEM;
820
821 if (copy_from_user(kernbuf, userbuf, count)) {
822 kfree(kernbuf);
823 return -EFAULT;
824 }
825
826 kernbuf[count] = 0;
827 strcat(kernbuf, ",");
828 ret = ibm->write(kernbuf);
829 if (ret == 0)
830 ret = count;
831
832 kfree(kernbuf);
833
834 return ret;
835 }
836
837 static char *next_cmd(char **cmds)
838 {
839 char *start = *cmds;
840 char *end;
841
842 while ((end = strchr(start, ',')) && end == start)
843 start = end + 1;
844
845 if (!end)
846 return NULL;
847
848 *end = 0;
849 *cmds = end + 1;
850 return start;
851 }
852
853
854 /****************************************************************************
855 ****************************************************************************
856 *
857 * Device model: input, hwmon and platform
858 *
859 ****************************************************************************
860 ****************************************************************************/
861
862 static struct platform_device *tpacpi_pdev;
863 static struct platform_device *tpacpi_sensors_pdev;
864 static struct device *tpacpi_hwmon;
865 static struct input_dev *tpacpi_inputdev;
866 static struct mutex tpacpi_inputdev_send_mutex;
867 static LIST_HEAD(tpacpi_all_drivers);
868
869 static int tpacpi_suspend_handler(struct platform_device *pdev,
870 pm_message_t state)
871 {
872 struct ibm_struct *ibm, *itmp;
873
874 list_for_each_entry_safe(ibm, itmp,
875 &tpacpi_all_drivers,
876 all_drivers) {
877 if (ibm->suspend)
878 (ibm->suspend)(state);
879 }
880
881 return 0;
882 }
883
884 static int tpacpi_resume_handler(struct platform_device *pdev)
885 {
886 struct ibm_struct *ibm, *itmp;
887
888 list_for_each_entry_safe(ibm, itmp,
889 &tpacpi_all_drivers,
890 all_drivers) {
891 if (ibm->resume)
892 (ibm->resume)();
893 }
894
895 return 0;
896 }
897
898 static void tpacpi_shutdown_handler(struct platform_device *pdev)
899 {
900 struct ibm_struct *ibm, *itmp;
901
902 list_for_each_entry_safe(ibm, itmp,
903 &tpacpi_all_drivers,
904 all_drivers) {
905 if (ibm->shutdown)
906 (ibm->shutdown)();
907 }
908 }
909
910 static struct platform_driver tpacpi_pdriver = {
911 .driver = {
912 .name = TPACPI_DRVR_NAME,
913 .owner = THIS_MODULE,
914 },
915 .suspend = tpacpi_suspend_handler,
916 .resume = tpacpi_resume_handler,
917 .shutdown = tpacpi_shutdown_handler,
918 };
919
920 static struct platform_driver tpacpi_hwmon_pdriver = {
921 .driver = {
922 .name = TPACPI_HWMON_DRVR_NAME,
923 .owner = THIS_MODULE,
924 },
925 };
926
927 /*************************************************************************
928 * sysfs support helpers
929 */
930
931 struct attribute_set {
932 unsigned int members, max_members;
933 struct attribute_group group;
934 };
935
936 struct attribute_set_obj {
937 struct attribute_set s;
938 struct attribute *a;
939 } __attribute__((packed));
940
941 static struct attribute_set *create_attr_set(unsigned int max_members,
942 const char *name)
943 {
944 struct attribute_set_obj *sobj;
945
946 if (max_members == 0)
947 return NULL;
948
949 /* Allocates space for implicit NULL at the end too */
950 sobj = kzalloc(sizeof(struct attribute_set_obj) +
951 max_members * sizeof(struct attribute *),
952 GFP_KERNEL);
953 if (!sobj)
954 return NULL;
955 sobj->s.max_members = max_members;
956 sobj->s.group.attrs = &sobj->a;
957 sobj->s.group.name = name;
958
959 return &sobj->s;
960 }
961
962 #define destroy_attr_set(_set) \
963 kfree(_set);
964
965 /* not multi-threaded safe, use it in a single thread per set */
966 static int add_to_attr_set(struct attribute_set *s, struct attribute *attr)
967 {
968 if (!s || !attr)
969 return -EINVAL;
970
971 if (s->members >= s->max_members)
972 return -ENOMEM;
973
974 s->group.attrs[s->members] = attr;
975 s->members++;
976
977 return 0;
978 }
979
980 static int add_many_to_attr_set(struct attribute_set *s,
981 struct attribute **attr,
982 unsigned int count)
983 {
984 int i, res;
985
986 for (i = 0; i < count; i++) {
987 res = add_to_attr_set(s, attr[i]);
988 if (res)
989 return res;
990 }
991
992 return 0;
993 }
994
995 static void delete_attr_set(struct attribute_set *s, struct kobject *kobj)
996 {
997 sysfs_remove_group(kobj, &s->group);
998 destroy_attr_set(s);
999 }
1000
1001 #define register_attr_set_with_sysfs(_attr_set, _kobj) \
1002 sysfs_create_group(_kobj, &_attr_set->group)
1003
1004 static int parse_strtoul(const char *buf,
1005 unsigned long max, unsigned long *value)
1006 {
1007 char *endp;
1008
1009 while (*buf && isspace(*buf))
1010 buf++;
1011 *value = simple_strtoul(buf, &endp, 0);
1012 while (*endp && isspace(*endp))
1013 endp++;
1014 if (*endp || *value > max)
1015 return -EINVAL;
1016
1017 return 0;
1018 }
1019
1020 static void tpacpi_disable_brightness_delay(void)
1021 {
1022 if (acpi_evalf(hkey_handle, NULL, "PWMS", "qvd", 0))
1023 printk(TPACPI_NOTICE
1024 "ACPI backlight control delay disabled\n");
1025 }
1026
1027 static int __init tpacpi_query_bcl_levels(acpi_handle handle)
1028 {
1029 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
1030 union acpi_object *obj;
1031 int rc;
1032
1033 if (ACPI_SUCCESS(acpi_evaluate_object(handle, NULL, NULL, &buffer))) {
1034 obj = (union acpi_object *)buffer.pointer;
1035 if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) {
1036 printk(TPACPI_ERR "Unknown _BCL data, "
1037 "please report this to %s\n", TPACPI_MAIL);
1038 rc = 0;
1039 } else {
1040 rc = obj->package.count;
1041 }
1042 } else {
1043 return 0;
1044 }
1045
1046 kfree(buffer.pointer);
1047 return rc;
1048 }
1049
1050 static acpi_status __init tpacpi_acpi_walk_find_bcl(acpi_handle handle,
1051 u32 lvl, void *context, void **rv)
1052 {
1053 char name[ACPI_PATH_SEGMENT_LENGTH];
1054 struct acpi_buffer buffer = { sizeof(name), &name };
1055
1056 if (ACPI_SUCCESS(acpi_get_name(handle, ACPI_SINGLE_NAME, &buffer)) &&
1057 !strncmp("_BCL", name, sizeof(name) - 1)) {
1058 BUG_ON(!rv || !*rv);
1059 **(int **)rv = tpacpi_query_bcl_levels(handle);
1060 return AE_CTRL_TERMINATE;
1061 } else {
1062 return AE_OK;
1063 }
1064 }
1065
1066 /*
1067 * Returns 0 (no ACPI _BCL or _BCL invalid), or size of brightness map
1068 */
1069 static int __init tpacpi_check_std_acpi_brightness_support(void)
1070 {
1071 int status;
1072 int bcl_levels = 0;
1073 void *bcl_ptr = &bcl_levels;
1074
1075 if (!vid_handle) {
1076 TPACPI_ACPIHANDLE_INIT(vid);
1077 }
1078 if (!vid_handle)
1079 return 0;
1080
1081 /*
1082 * Search for a _BCL method, and execute it. This is safe on all
1083 * ThinkPads, and as a side-effect, _BCL will place a Lenovo Vista
1084 * BIOS in ACPI backlight control mode. We do NOT have to care
1085 * about calling the _BCL method in an enabled video device, any
1086 * will do for our purposes.
1087 */
1088
1089 status = acpi_walk_namespace(ACPI_TYPE_METHOD, vid_handle, 3,
1090 tpacpi_acpi_walk_find_bcl, NULL,
1091 &bcl_ptr);
1092
1093 if (ACPI_SUCCESS(status) && bcl_levels > 2) {
1094 tp_features.bright_acpimode = 1;
1095 return (bcl_levels - 2);
1096 }
1097
1098 return 0;
1099 }
1100
1101 static void printk_deprecated_attribute(const char * const what,
1102 const char * const details)
1103 {
1104 tpacpi_log_usertask("deprecated sysfs attribute");
1105 printk(TPACPI_WARN "WARNING: sysfs attribute %s is deprecated and "
1106 "will be removed. %s\n",
1107 what, details);
1108 }
1109
1110 /*************************************************************************
1111 * rfkill and radio control support helpers
1112 */
1113
1114 /*
1115 * ThinkPad-ACPI firmware handling model:
1116 *
1117 * WLSW (master wireless switch) is event-driven, and is common to all
1118 * firmware-controlled radios. It cannot be controlled, just monitored,
1119 * as expected. It overrides all radio state in firmware
1120 *
1121 * The kernel, a masked-off hotkey, and WLSW can change the radio state
1122 * (TODO: verify how WLSW interacts with the returned radio state).
1123 *
1124 * The only time there are shadow radio state changes, is when
1125 * masked-off hotkeys are used.
1126 */
1127
1128 /*
1129 * Internal driver API for radio state:
1130 *
1131 * int: < 0 = error, otherwise enum tpacpi_rfkill_state
1132 * bool: true means radio blocked (off)
1133 */
1134 enum tpacpi_rfkill_state {
1135 TPACPI_RFK_RADIO_OFF = 0,
1136 TPACPI_RFK_RADIO_ON
1137 };
1138
1139 /* rfkill switches */
1140 enum tpacpi_rfk_id {
1141 TPACPI_RFK_BLUETOOTH_SW_ID = 0,
1142 TPACPI_RFK_WWAN_SW_ID,
1143 TPACPI_RFK_UWB_SW_ID,
1144 TPACPI_RFK_SW_MAX
1145 };
1146
1147 static const char *tpacpi_rfkill_names[] = {
1148 [TPACPI_RFK_BLUETOOTH_SW_ID] = "bluetooth",
1149 [TPACPI_RFK_WWAN_SW_ID] = "wwan",
1150 [TPACPI_RFK_UWB_SW_ID] = "uwb",
1151 [TPACPI_RFK_SW_MAX] = NULL
1152 };
1153
1154 /* ThinkPad-ACPI rfkill subdriver */
1155 struct tpacpi_rfk {
1156 struct rfkill *rfkill;
1157 enum tpacpi_rfk_id id;
1158 const struct tpacpi_rfk_ops *ops;
1159 };
1160
1161 struct tpacpi_rfk_ops {
1162 /* firmware interface */
1163 int (*get_status)(void);
1164 int (*set_status)(const enum tpacpi_rfkill_state);
1165 };
1166
1167 static struct tpacpi_rfk *tpacpi_rfkill_switches[TPACPI_RFK_SW_MAX];
1168
1169 /* Query FW and update rfkill sw state for a given rfkill switch */
1170 static int tpacpi_rfk_update_swstate(const struct tpacpi_rfk *tp_rfk)
1171 {
1172 int status;
1173
1174 if (!tp_rfk)
1175 return -ENODEV;
1176
1177 status = (tp_rfk->ops->get_status)();
1178 if (status < 0)
1179 return status;
1180
1181 rfkill_set_sw_state(tp_rfk->rfkill,
1182 (status == TPACPI_RFK_RADIO_OFF));
1183
1184 return status;
1185 }
1186
1187 /* Query FW and update rfkill sw state for all rfkill switches */
1188 static void tpacpi_rfk_update_swstate_all(void)
1189 {
1190 unsigned int i;
1191
1192 for (i = 0; i < TPACPI_RFK_SW_MAX; i++)
1193 tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[i]);
1194 }
1195
1196 /*
1197 * Sync the HW-blocking state of all rfkill switches,
1198 * do notice it causes the rfkill core to schedule uevents
1199 */
1200 static void tpacpi_rfk_update_hwblock_state(bool blocked)
1201 {
1202 unsigned int i;
1203 struct tpacpi_rfk *tp_rfk;
1204
1205 for (i = 0; i < TPACPI_RFK_SW_MAX; i++) {
1206 tp_rfk = tpacpi_rfkill_switches[i];
1207 if (tp_rfk) {
1208 if (rfkill_set_hw_state(tp_rfk->rfkill,
1209 blocked)) {
1210 /* ignore -- we track sw block */
1211 }
1212 }
1213 }
1214 }
1215
1216 /* Call to get the WLSW state from the firmware */
1217 static int hotkey_get_wlsw(void);
1218
1219 /* Call to query WLSW state and update all rfkill switches */
1220 static bool tpacpi_rfk_check_hwblock_state(void)
1221 {
1222 int res = hotkey_get_wlsw();
1223 int hw_blocked;
1224
1225 /* When unknown or unsupported, we have to assume it is unblocked */
1226 if (res < 0)
1227 return false;
1228
1229 hw_blocked = (res == TPACPI_RFK_RADIO_OFF);
1230 tpacpi_rfk_update_hwblock_state(hw_blocked);
1231
1232 return hw_blocked;
1233 }
1234
1235 static int tpacpi_rfk_hook_set_block(void *data, bool blocked)
1236 {
1237 struct tpacpi_rfk *tp_rfk = data;
1238 int res;
1239
1240 dbg_printk(TPACPI_DBG_RFKILL,
1241 "request to change radio state to %s\n",
1242 blocked ? "blocked" : "unblocked");
1243
1244 /* try to set radio state */
1245 res = (tp_rfk->ops->set_status)(blocked ?
1246 TPACPI_RFK_RADIO_OFF : TPACPI_RFK_RADIO_ON);
1247
1248 /* and update the rfkill core with whatever the FW really did */
1249 tpacpi_rfk_update_swstate(tp_rfk);
1250
1251 return (res < 0) ? res : 0;
1252 }
1253
1254 static const struct rfkill_ops tpacpi_rfk_rfkill_ops = {
1255 .set_block = tpacpi_rfk_hook_set_block,
1256 };
1257
1258 static int __init tpacpi_new_rfkill(const enum tpacpi_rfk_id id,
1259 const struct tpacpi_rfk_ops *tp_rfkops,
1260 const enum rfkill_type rfktype,
1261 const char *name,
1262 const bool set_default)
1263 {
1264 struct tpacpi_rfk *atp_rfk;
1265 int res;
1266 bool sw_state = false;
1267 int sw_status;
1268
1269 BUG_ON(id >= TPACPI_RFK_SW_MAX || tpacpi_rfkill_switches[id]);
1270
1271 atp_rfk = kzalloc(sizeof(struct tpacpi_rfk), GFP_KERNEL);
1272 if (atp_rfk)
1273 atp_rfk->rfkill = rfkill_alloc(name,
1274 &tpacpi_pdev->dev,
1275 rfktype,
1276 &tpacpi_rfk_rfkill_ops,
1277 atp_rfk);
1278 if (!atp_rfk || !atp_rfk->rfkill) {
1279 printk(TPACPI_ERR
1280 "failed to allocate memory for rfkill class\n");
1281 kfree(atp_rfk);
1282 return -ENOMEM;
1283 }
1284
1285 atp_rfk->id = id;
1286 atp_rfk->ops = tp_rfkops;
1287
1288 sw_status = (tp_rfkops->get_status)();
1289 if (sw_status < 0) {
1290 printk(TPACPI_ERR
1291 "failed to read initial state for %s, error %d\n",
1292 name, sw_status);
1293 } else {
1294 sw_state = (sw_status == TPACPI_RFK_RADIO_OFF);
1295 if (set_default) {
1296 /* try to keep the initial state, since we ask the
1297 * firmware to preserve it across S5 in NVRAM */
1298 rfkill_init_sw_state(atp_rfk->rfkill, sw_state);
1299 }
1300 }
1301 rfkill_set_hw_state(atp_rfk->rfkill, tpacpi_rfk_check_hwblock_state());
1302
1303 res = rfkill_register(atp_rfk->rfkill);
1304 if (res < 0) {
1305 printk(TPACPI_ERR
1306 "failed to register %s rfkill switch: %d\n",
1307 name, res);
1308 rfkill_destroy(atp_rfk->rfkill);
1309 kfree(atp_rfk);
1310 return res;
1311 }
1312
1313 tpacpi_rfkill_switches[id] = atp_rfk;
1314 return 0;
1315 }
1316
1317 static void tpacpi_destroy_rfkill(const enum tpacpi_rfk_id id)
1318 {
1319 struct tpacpi_rfk *tp_rfk;
1320
1321 BUG_ON(id >= TPACPI_RFK_SW_MAX);
1322
1323 tp_rfk = tpacpi_rfkill_switches[id];
1324 if (tp_rfk) {
1325 rfkill_unregister(tp_rfk->rfkill);
1326 rfkill_destroy(tp_rfk->rfkill);
1327 tpacpi_rfkill_switches[id] = NULL;
1328 kfree(tp_rfk);
1329 }
1330 }
1331
1332 static void printk_deprecated_rfkill_attribute(const char * const what)
1333 {
1334 printk_deprecated_attribute(what,
1335 "Please switch to generic rfkill before year 2010");
1336 }
1337
1338 /* sysfs <radio> enable ------------------------------------------------ */
1339 static ssize_t tpacpi_rfk_sysfs_enable_show(const enum tpacpi_rfk_id id,
1340 struct device_attribute *attr,
1341 char *buf)
1342 {
1343 int status;
1344
1345 printk_deprecated_rfkill_attribute(attr->attr.name);
1346
1347 /* This is in the ABI... */
1348 if (tpacpi_rfk_check_hwblock_state()) {
1349 status = TPACPI_RFK_RADIO_OFF;
1350 } else {
1351 status = tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]);
1352 if (status < 0)
1353 return status;
1354 }
1355
1356 return snprintf(buf, PAGE_SIZE, "%d\n",
1357 (status == TPACPI_RFK_RADIO_ON) ? 1 : 0);
1358 }
1359
1360 static ssize_t tpacpi_rfk_sysfs_enable_store(const enum tpacpi_rfk_id id,
1361 struct device_attribute *attr,
1362 const char *buf, size_t count)
1363 {
1364 unsigned long t;
1365 int res;
1366
1367 printk_deprecated_rfkill_attribute(attr->attr.name);
1368
1369 if (parse_strtoul(buf, 1, &t))
1370 return -EINVAL;
1371
1372 tpacpi_disclose_usertask(attr->attr.name, "set to %ld\n", t);
1373
1374 /* This is in the ABI... */
1375 if (tpacpi_rfk_check_hwblock_state() && !!t)
1376 return -EPERM;
1377
1378 res = tpacpi_rfkill_switches[id]->ops->set_status((!!t) ?
1379 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF);
1380 tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]);
1381
1382 return (res < 0) ? res : count;
1383 }
1384
1385 /* procfs -------------------------------------------------------------- */
1386 static int tpacpi_rfk_procfs_read(const enum tpacpi_rfk_id id, char *p)
1387 {
1388 int len = 0;
1389
1390 if (id >= TPACPI_RFK_SW_MAX)
1391 len += sprintf(p + len, "status:\t\tnot supported\n");
1392 else {
1393 int status;
1394
1395 /* This is in the ABI... */
1396 if (tpacpi_rfk_check_hwblock_state()) {
1397 status = TPACPI_RFK_RADIO_OFF;
1398 } else {
1399 status = tpacpi_rfk_update_swstate(
1400 tpacpi_rfkill_switches[id]);
1401 if (status < 0)
1402 return status;
1403 }
1404
1405 len += sprintf(p + len, "status:\t\t%s\n",
1406 (status == TPACPI_RFK_RADIO_ON) ?
1407 "enabled" : "disabled");
1408 len += sprintf(p + len, "commands:\tenable, disable\n");
1409 }
1410
1411 return len;
1412 }
1413
1414 static int tpacpi_rfk_procfs_write(const enum tpacpi_rfk_id id, char *buf)
1415 {
1416 char *cmd;
1417 int status = -1;
1418 int res = 0;
1419
1420 if (id >= TPACPI_RFK_SW_MAX)
1421 return -ENODEV;
1422
1423 while ((cmd = next_cmd(&buf))) {
1424 if (strlencmp(cmd, "enable") == 0)
1425 status = TPACPI_RFK_RADIO_ON;
1426 else if (strlencmp(cmd, "disable") == 0)
1427 status = TPACPI_RFK_RADIO_OFF;
1428 else
1429 return -EINVAL;
1430 }
1431
1432 if (status != -1) {
1433 tpacpi_disclose_usertask("procfs", "attempt to %s %s\n",
1434 (status == TPACPI_RFK_RADIO_ON) ?
1435 "enable" : "disable",
1436 tpacpi_rfkill_names[id]);
1437 res = (tpacpi_rfkill_switches[id]->ops->set_status)(status);
1438 tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]);
1439 }
1440
1441 return res;
1442 }
1443
1444 /*************************************************************************
1445 * thinkpad-acpi driver attributes
1446 */
1447
1448 /* interface_version --------------------------------------------------- */
1449 static ssize_t tpacpi_driver_interface_version_show(
1450 struct device_driver *drv,
1451 char *buf)
1452 {
1453 return snprintf(buf, PAGE_SIZE, "0x%08x\n", TPACPI_SYSFS_VERSION);
1454 }
1455
1456 static DRIVER_ATTR(interface_version, S_IRUGO,
1457 tpacpi_driver_interface_version_show, NULL);
1458
1459 /* debug_level --------------------------------------------------------- */
1460 static ssize_t tpacpi_driver_debug_show(struct device_driver *drv,
1461 char *buf)
1462 {
1463 return snprintf(buf, PAGE_SIZE, "0x%04x\n", dbg_level);
1464 }
1465
1466 static ssize_t tpacpi_driver_debug_store(struct device_driver *drv,
1467 const char *buf, size_t count)
1468 {
1469 unsigned long t;
1470
1471 if (parse_strtoul(buf, 0xffff, &t))
1472 return -EINVAL;
1473
1474 dbg_level = t;
1475
1476 return count;
1477 }
1478
1479 static DRIVER_ATTR(debug_level, S_IWUSR | S_IRUGO,
1480 tpacpi_driver_debug_show, tpacpi_driver_debug_store);
1481
1482 /* version ------------------------------------------------------------- */
1483 static ssize_t tpacpi_driver_version_show(struct device_driver *drv,
1484 char *buf)
1485 {
1486 return snprintf(buf, PAGE_SIZE, "%s v%s\n",
1487 TPACPI_DESC, TPACPI_VERSION);
1488 }
1489
1490 static DRIVER_ATTR(version, S_IRUGO,
1491 tpacpi_driver_version_show, NULL);
1492
1493 /* --------------------------------------------------------------------- */
1494
1495 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
1496
1497 /* wlsw_emulstate ------------------------------------------------------ */
1498 static ssize_t tpacpi_driver_wlsw_emulstate_show(struct device_driver *drv,
1499 char *buf)
1500 {
1501 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_wlsw_emulstate);
1502 }
1503
1504 static ssize_t tpacpi_driver_wlsw_emulstate_store(struct device_driver *drv,
1505 const char *buf, size_t count)
1506 {
1507 unsigned long t;
1508
1509 if (parse_strtoul(buf, 1, &t))
1510 return -EINVAL;
1511
1512 if (tpacpi_wlsw_emulstate != !!t) {
1513 tpacpi_wlsw_emulstate = !!t;
1514 tpacpi_rfk_update_hwblock_state(!t); /* negative logic */
1515 }
1516
1517 return count;
1518 }
1519
1520 static DRIVER_ATTR(wlsw_emulstate, S_IWUSR | S_IRUGO,
1521 tpacpi_driver_wlsw_emulstate_show,
1522 tpacpi_driver_wlsw_emulstate_store);
1523
1524 /* bluetooth_emulstate ------------------------------------------------- */
1525 static ssize_t tpacpi_driver_bluetooth_emulstate_show(
1526 struct device_driver *drv,
1527 char *buf)
1528 {
1529 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_bluetooth_emulstate);
1530 }
1531
1532 static ssize_t tpacpi_driver_bluetooth_emulstate_store(
1533 struct device_driver *drv,
1534 const char *buf, size_t count)
1535 {
1536 unsigned long t;
1537
1538 if (parse_strtoul(buf, 1, &t))
1539 return -EINVAL;
1540
1541 tpacpi_bluetooth_emulstate = !!t;
1542
1543 return count;
1544 }
1545
1546 static DRIVER_ATTR(bluetooth_emulstate, S_IWUSR | S_IRUGO,
1547 tpacpi_driver_bluetooth_emulstate_show,
1548 tpacpi_driver_bluetooth_emulstate_store);
1549
1550 /* wwan_emulstate ------------------------------------------------- */
1551 static ssize_t tpacpi_driver_wwan_emulstate_show(
1552 struct device_driver *drv,
1553 char *buf)
1554 {
1555 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_wwan_emulstate);
1556 }
1557
1558 static ssize_t tpacpi_driver_wwan_emulstate_store(
1559 struct device_driver *drv,
1560 const char *buf, size_t count)
1561 {
1562 unsigned long t;
1563
1564 if (parse_strtoul(buf, 1, &t))
1565 return -EINVAL;
1566
1567 tpacpi_wwan_emulstate = !!t;
1568
1569 return count;
1570 }
1571
1572 static DRIVER_ATTR(wwan_emulstate, S_IWUSR | S_IRUGO,
1573 tpacpi_driver_wwan_emulstate_show,
1574 tpacpi_driver_wwan_emulstate_store);
1575
1576 /* uwb_emulstate ------------------------------------------------- */
1577 static ssize_t tpacpi_driver_uwb_emulstate_show(
1578 struct device_driver *drv,
1579 char *buf)
1580 {
1581 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_uwb_emulstate);
1582 }
1583
1584 static ssize_t tpacpi_driver_uwb_emulstate_store(
1585 struct device_driver *drv,
1586 const char *buf, size_t count)
1587 {
1588 unsigned long t;
1589
1590 if (parse_strtoul(buf, 1, &t))
1591 return -EINVAL;
1592
1593 tpacpi_uwb_emulstate = !!t;
1594
1595 return count;
1596 }
1597
1598 static DRIVER_ATTR(uwb_emulstate, S_IWUSR | S_IRUGO,
1599 tpacpi_driver_uwb_emulstate_show,
1600 tpacpi_driver_uwb_emulstate_store);
1601 #endif
1602
1603 /* --------------------------------------------------------------------- */
1604
1605 static struct driver_attribute *tpacpi_driver_attributes[] = {
1606 &driver_attr_debug_level, &driver_attr_version,
1607 &driver_attr_interface_version,
1608 };
1609
1610 static int __init tpacpi_create_driver_attributes(struct device_driver *drv)
1611 {
1612 int i, res;
1613
1614 i = 0;
1615 res = 0;
1616 while (!res && i < ARRAY_SIZE(tpacpi_driver_attributes)) {
1617 res = driver_create_file(drv, tpacpi_driver_attributes[i]);
1618 i++;
1619 }
1620
1621 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
1622 if (!res && dbg_wlswemul)
1623 res = driver_create_file(drv, &driver_attr_wlsw_emulstate);
1624 if (!res && dbg_bluetoothemul)
1625 res = driver_create_file(drv, &driver_attr_bluetooth_emulstate);
1626 if (!res && dbg_wwanemul)
1627 res = driver_create_file(drv, &driver_attr_wwan_emulstate);
1628 if (!res && dbg_uwbemul)
1629 res = driver_create_file(drv, &driver_attr_uwb_emulstate);
1630 #endif
1631
1632 return res;
1633 }
1634
1635 static void tpacpi_remove_driver_attributes(struct device_driver *drv)
1636 {
1637 int i;
1638
1639 for (i = 0; i < ARRAY_SIZE(tpacpi_driver_attributes); i++)
1640 driver_remove_file(drv, tpacpi_driver_attributes[i]);
1641
1642 #ifdef THINKPAD_ACPI_DEBUGFACILITIES
1643 driver_remove_file(drv, &driver_attr_wlsw_emulstate);
1644 driver_remove_file(drv, &driver_attr_bluetooth_emulstate);
1645 driver_remove_file(drv, &driver_attr_wwan_emulstate);
1646 driver_remove_file(drv, &driver_attr_uwb_emulstate);
1647 #endif
1648 }
1649
1650 /*************************************************************************
1651 * Firmware Data
1652 */
1653
1654 /*
1655 * Table of recommended minimum BIOS versions
1656 *
1657 * Reasons for listing:
1658 * 1. Stable BIOS, listed because the unknown ammount of
1659 * bugs and bad ACPI behaviour on older versions
1660 *
1661 * 2. BIOS or EC fw with known bugs that trigger on Linux
1662 *
1663 * 3. BIOS with known reduced functionality in older versions
1664 *
1665 * We recommend the latest BIOS and EC version.
1666 * We only support the latest BIOS and EC fw version as a rule.
1667 *
1668 * Sources: IBM ThinkPad Public Web Documents (update changelogs),
1669 * Information from users in ThinkWiki
1670 *
1671 * WARNING: we use this table also to detect that the machine is
1672 * a ThinkPad in some cases, so don't remove entries lightly.
1673 */
1674
1675 #define TPV_Q(__v, __id1, __id2, __bv1, __bv2) \
1676 { .vendor = (__v), \
1677 .bios = TPID(__id1, __id2), \
1678 .ec = TPACPI_MATCH_ANY, \
1679 .quirks = TPACPI_MATCH_ANY << 16 \
1680 | (__bv1) << 8 | (__bv2) }
1681
1682 #define TPV_Q_X(__v, __bid1, __bid2, __bv1, __bv2, \
1683 __eid, __ev1, __ev2) \
1684 { .vendor = (__v), \
1685 .bios = TPID(__bid1, __bid2), \
1686 .ec = __eid, \
1687 .quirks = (__ev1) << 24 | (__ev2) << 16 \
1688 | (__bv1) << 8 | (__bv2) }
1689
1690 #define TPV_QI0(__id1, __id2, __bv1, __bv2) \
1691 TPV_Q(PCI_VENDOR_ID_IBM, __id1, __id2, __bv1, __bv2)
1692
1693 /* Outdated IBM BIOSes often lack the EC id string */
1694 #define TPV_QI1(__id1, __id2, __bv1, __bv2, __ev1, __ev2) \
1695 TPV_Q_X(PCI_VENDOR_ID_IBM, __id1, __id2, \
1696 __bv1, __bv2, TPID(__id1, __id2), \
1697 __ev1, __ev2), \
1698 TPV_Q_X(PCI_VENDOR_ID_IBM, __id1, __id2, \
1699 __bv1, __bv2, TPACPI_MATCH_UNKNOWN, \
1700 __ev1, __ev2)
1701
1702 /* Outdated IBM BIOSes often lack the EC id string */
1703 #define TPV_QI2(__bid1, __bid2, __bv1, __bv2, \
1704 __eid1, __eid2, __ev1, __ev2) \
1705 TPV_Q_X(PCI_VENDOR_ID_IBM, __bid1, __bid2, \
1706 __bv1, __bv2, TPID(__eid1, __eid2), \
1707 __ev1, __ev2), \
1708 TPV_Q_X(PCI_VENDOR_ID_IBM, __bid1, __bid2, \
1709 __bv1, __bv2, TPACPI_MATCH_UNKNOWN, \
1710 __ev1, __ev2)
1711
1712 #define TPV_QL0(__id1, __id2, __bv1, __bv2) \
1713 TPV_Q(PCI_VENDOR_ID_LENOVO, __id1, __id2, __bv1, __bv2)
1714
1715 #define TPV_QL1(__id1, __id2, __bv1, __bv2, __ev1, __ev2) \
1716 TPV_Q_X(PCI_VENDOR_ID_LENOVO, __id1, __id2, \
1717 __bv1, __bv2, TPID(__id1, __id2), \
1718 __ev1, __ev2)
1719
1720 #define TPV_QL2(__bid1, __bid2, __bv1, __bv2, \
1721 __eid1, __eid2, __ev1, __ev2) \
1722 TPV_Q_X(PCI_VENDOR_ID_LENOVO, __bid1, __bid2, \
1723 __bv1, __bv2, TPID(__eid1, __eid2), \
1724 __ev1, __ev2)
1725
1726 static const struct tpacpi_quirk tpacpi_bios_version_qtable[] __initconst = {
1727 /* Numeric models ------------------ */
1728 /* FW MODEL BIOS VERS */
1729 TPV_QI0('I', 'M', '6', '5'), /* 570 */
1730 TPV_QI0('I', 'U', '2', '6'), /* 570E */
1731 TPV_QI0('I', 'B', '5', '4'), /* 600 */
1732 TPV_QI0('I', 'H', '4', '7'), /* 600E */
1733 TPV_QI0('I', 'N', '3', '6'), /* 600E */
1734 TPV_QI0('I', 'T', '5', '5'), /* 600X */
1735 TPV_QI0('I', 'D', '4', '8'), /* 770, 770E, 770ED */
1736 TPV_QI0('I', 'I', '4', '2'), /* 770X */
1737 TPV_QI0('I', 'O', '2', '3'), /* 770Z */
1738
1739 /* A-series ------------------------- */
1740 /* FW MODEL BIOS VERS EC VERS */
1741 TPV_QI0('I', 'W', '5', '9'), /* A20m */
1742 TPV_QI0('I', 'V', '6', '9'), /* A20p */
1743 TPV_QI0('1', '0', '2', '6'), /* A21e, A22e */
1744 TPV_QI0('K', 'U', '3', '6'), /* A21e */
1745 TPV_QI0('K', 'X', '3', '6'), /* A21m, A22m */
1746 TPV_QI0('K', 'Y', '3', '8'), /* A21p, A22p */
1747 TPV_QI0('1', 'B', '1', '7'), /* A22e */
1748 TPV_QI0('1', '3', '2', '0'), /* A22m */
1749 TPV_QI0('1', 'E', '7', '3'), /* A30/p (0) */
1750 TPV_QI1('1', 'G', '4', '1', '1', '7'), /* A31/p (0) */
1751 TPV_QI1('1', 'N', '1', '6', '0', '7'), /* A31/p (0) */
1752
1753 /* G-series ------------------------- */
1754 /* FW MODEL BIOS VERS */
1755 TPV_QI0('1', 'T', 'A', '6'), /* G40 */
1756 TPV_QI0('1', 'X', '5', '7'), /* G41 */
1757
1758 /* R-series, T-series --------------- */
1759 /* FW MODEL BIOS VERS EC VERS */
1760 TPV_QI0('1', 'C', 'F', '0'), /* R30 */
1761 TPV_QI0('1', 'F', 'F', '1'), /* R31 */
1762 TPV_QI0('1', 'M', '9', '7'), /* R32 */
1763 TPV_QI0('1', 'O', '6', '1'), /* R40 */
1764 TPV_QI0('1', 'P', '6', '5'), /* R40 */
1765 TPV_QI0('1', 'S', '7', '0'), /* R40e */
1766 TPV_QI1('1', 'R', 'D', 'R', '7', '1'), /* R50/p, R51,
1767 T40/p, T41/p, T42/p (1) */
1768 TPV_QI1('1', 'V', '7', '1', '2', '8'), /* R50e, R51 (1) */
1769 TPV_QI1('7', '8', '7', '1', '0', '6'), /* R51e (1) */
1770 TPV_QI1('7', '6', '6', '9', '1', '6'), /* R52 (1) */
1771 TPV_QI1('7', '0', '6', '9', '2', '8'), /* R52, T43 (1) */
1772
1773 TPV_QI0('I', 'Y', '6', '1'), /* T20 */
1774 TPV_QI0('K', 'Z', '3', '4'), /* T21 */
1775 TPV_QI0('1', '6', '3', '2'), /* T22 */
1776 TPV_QI1('1', 'A', '6', '4', '2', '3'), /* T23 (0) */
1777 TPV_QI1('1', 'I', '7', '1', '2', '0'), /* T30 (0) */
1778 TPV_QI1('1', 'Y', '6', '5', '2', '9'), /* T43/p (1) */
1779
1780 TPV_QL1('7', '9', 'E', '3', '5', '0'), /* T60/p */
1781 TPV_QL1('7', 'C', 'D', '2', '2', '2'), /* R60, R60i */
1782 TPV_QL1('7', 'E', 'D', '0', '1', '5'), /* R60e, R60i */
1783
1784 /* BIOS FW BIOS VERS EC FW EC VERS */
1785 TPV_QI2('1', 'W', '9', '0', '1', 'V', '2', '8'), /* R50e (1) */
1786 TPV_QL2('7', 'I', '3', '4', '7', '9', '5', '0'), /* T60/p wide */
1787
1788 /* X-series ------------------------- */
1789 /* FW MODEL BIOS VERS EC VERS */
1790 TPV_QI0('I', 'Z', '9', 'D'), /* X20, X21 */
1791 TPV_QI0('1', 'D', '7', '0'), /* X22, X23, X24 */
1792 TPV_QI1('1', 'K', '4', '8', '1', '8'), /* X30 (0) */
1793 TPV_QI1('1', 'Q', '9', '7', '2', '3'), /* X31, X32 (0) */
1794 TPV_QI1('1', 'U', 'D', '3', 'B', '2'), /* X40 (0) */
1795 TPV_QI1('7', '4', '6', '4', '2', '7'), /* X41 (0) */
1796 TPV_QI1('7', '5', '6', '0', '2', '0'), /* X41t (0) */
1797
1798 TPV_QL1('7', 'B', 'D', '7', '4', '0'), /* X60/s */
1799 TPV_QL1('7', 'J', '3', '0', '1', '3'), /* X60t */
1800
1801 /* (0) - older versions lack DMI EC fw string and functionality */
1802 /* (1) - older versions known to lack functionality */
1803 };
1804
1805 #undef TPV_QL1
1806 #undef TPV_QL0
1807 #undef TPV_QI2
1808 #undef TPV_QI1
1809 #undef TPV_QI0
1810 #undef TPV_Q_X
1811 #undef TPV_Q
1812
1813 static void __init tpacpi_check_outdated_fw(void)
1814 {
1815 unsigned long fwvers;
1816 u16 ec_version, bios_version;
1817
1818 fwvers = tpacpi_check_quirks(tpacpi_bios_version_qtable,
1819 ARRAY_SIZE(tpacpi_bios_version_qtable));
1820
1821 if (!fwvers)
1822 return;
1823
1824 bios_version = fwvers & 0xffffU;
1825 ec_version = (fwvers >> 16) & 0xffffU;
1826
1827 /* note that unknown versions are set to 0x0000 and we use that */
1828 if ((bios_version > thinkpad_id.bios_release) ||
1829 (ec_version > thinkpad_id.ec_release &&
1830 ec_version != TPACPI_MATCH_ANY)) {
1831 /*
1832 * The changelogs would let us track down the exact
1833 * reason, but it is just too much of a pain to track
1834 * it. We only list BIOSes that are either really
1835 * broken, or really stable to begin with, so it is
1836 * best if the user upgrades the firmware anyway.
1837 */
1838 printk(TPACPI_WARN
1839 "WARNING: Outdated ThinkPad BIOS/EC firmware\n");
1840 printk(TPACPI_WARN
1841 "WARNING: This firmware may be missing critical bug "
1842 "fixes and/or important features\n");
1843 }
1844 }
1845
1846 static bool __init tpacpi_is_fw_known(void)
1847 {
1848 return tpacpi_check_quirks(tpacpi_bios_version_qtable,
1849 ARRAY_SIZE(tpacpi_bios_version_qtable)) != 0;
1850 }
1851
1852 /****************************************************************************
1853 ****************************************************************************
1854 *
1855 * Subdrivers
1856 *
1857 ****************************************************************************
1858 ****************************************************************************/
1859
1860 /*************************************************************************
1861 * thinkpad-acpi init subdriver
1862 */
1863
1864 static int __init thinkpad_acpi_driver_init(struct ibm_init_struct *iibm)
1865 {
1866 printk(TPACPI_INFO "%s v%s\n", TPACPI_DESC, TPACPI_VERSION);
1867 printk(TPACPI_INFO "%s\n", TPACPI_URL);
1868
1869 printk(TPACPI_INFO "ThinkPad BIOS %s, EC %s\n",
1870 (thinkpad_id.bios_version_str) ?
1871 thinkpad_id.bios_version_str : "unknown",
1872 (thinkpad_id.ec_version_str) ?
1873 thinkpad_id.ec_version_str : "unknown");
1874
1875 if (thinkpad_id.vendor && thinkpad_id.model_str)
1876 printk(TPACPI_INFO "%s %s, model %s\n",
1877 (thinkpad_id.vendor == PCI_VENDOR_ID_IBM) ?
1878 "IBM" : ((thinkpad_id.vendor ==
1879 PCI_VENDOR_ID_LENOVO) ?
1880 "Lenovo" : "Unknown vendor"),
1881 thinkpad_id.model_str,
1882 (thinkpad_id.nummodel_str) ?
1883 thinkpad_id.nummodel_str : "unknown");
1884
1885 tpacpi_check_outdated_fw();
1886 return 0;
1887 }
1888
1889 static int thinkpad_acpi_driver_read(char *p)
1890 {
1891 int len = 0;
1892
1893 len += sprintf(p + len, "driver:\t\t%s\n", TPACPI_DESC);
1894 len += sprintf(p + len, "version:\t%s\n", TPACPI_VERSION);
1895
1896 return len;
1897 }
1898
1899 static struct ibm_struct thinkpad_acpi_driver_data = {
1900 .name = "driver",
1901 .read = thinkpad_acpi_driver_read,
1902 };
1903
1904 /*************************************************************************
1905 * Hotkey subdriver
1906 */
1907
1908 /*
1909 * ThinkPad firmware event model
1910 *
1911 * The ThinkPad firmware has two main event interfaces: normal ACPI
1912 * notifications (which follow the ACPI standard), and a private event
1913 * interface.
1914 *
1915 * The private event interface also issues events for the hotkeys. As
1916 * the driver gained features, the event handling code ended up being
1917 * built around the hotkey subdriver. This will need to be refactored
1918 * to a more formal event API eventually.
1919 *
1920 * Some "hotkeys" are actually supposed to be used as event reports,
1921 * such as "brightness has changed", "volume has changed", depending on
1922 * the ThinkPad model and how the firmware is operating.
1923 *
1924 * Unlike other classes, hotkey-class events have mask/unmask control on
1925 * non-ancient firmware. However, how it behaves changes a lot with the
1926 * firmware model and version.
1927 */
1928
1929 enum { /* hot key scan codes (derived from ACPI DSDT) */
1930 TP_ACPI_HOTKEYSCAN_FNF1 = 0,
1931 TP_ACPI_HOTKEYSCAN_FNF2,
1932 TP_ACPI_HOTKEYSCAN_FNF3,
1933 TP_ACPI_HOTKEYSCAN_FNF4,
1934 TP_ACPI_HOTKEYSCAN_FNF5,
1935 TP_ACPI_HOTKEYSCAN_FNF6,
1936 TP_ACPI_HOTKEYSCAN_FNF7,
1937 TP_ACPI_HOTKEYSCAN_FNF8,
1938 TP_ACPI_HOTKEYSCAN_FNF9,
1939 TP_ACPI_HOTKEYSCAN_FNF10,
1940 TP_ACPI_HOTKEYSCAN_FNF11,
1941 TP_ACPI_HOTKEYSCAN_FNF12,
1942 TP_ACPI_HOTKEYSCAN_FNBACKSPACE,
1943 TP_ACPI_HOTKEYSCAN_FNINSERT,
1944 TP_ACPI_HOTKEYSCAN_FNDELETE,
1945 TP_ACPI_HOTKEYSCAN_FNHOME,
1946 TP_ACPI_HOTKEYSCAN_FNEND,
1947 TP_ACPI_HOTKEYSCAN_FNPAGEUP,
1948 TP_ACPI_HOTKEYSCAN_FNPAGEDOWN,
1949 TP_ACPI_HOTKEYSCAN_FNSPACE,
1950 TP_ACPI_HOTKEYSCAN_VOLUMEUP,
1951 TP_ACPI_HOTKEYSCAN_VOLUMEDOWN,
1952 TP_ACPI_HOTKEYSCAN_MUTE,
1953 TP_ACPI_HOTKEYSCAN_THINKPAD,
1954 };
1955
1956 enum { /* Keys/events available through NVRAM polling */
1957 TPACPI_HKEY_NVRAM_KNOWN_MASK = 0x00fb88c0U,
1958 TPACPI_HKEY_NVRAM_GOOD_MASK = 0x00fb8000U,
1959 };
1960
1961 enum { /* Positions of some of the keys in hotkey masks */
1962 TP_ACPI_HKEY_DISPSWTCH_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF7,
1963 TP_ACPI_HKEY_DISPXPAND_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF8,
1964 TP_ACPI_HKEY_HIBERNATE_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF12,
1965 TP_ACPI_HKEY_BRGHTUP_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNHOME,
1966 TP_ACPI_HKEY_BRGHTDWN_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNEND,
1967 TP_ACPI_HKEY_THNKLGHT_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNPAGEUP,
1968 TP_ACPI_HKEY_ZOOM_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNSPACE,
1969 TP_ACPI_HKEY_VOLUP_MASK = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEUP,
1970 TP_ACPI_HKEY_VOLDWN_MASK = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEDOWN,
1971 TP_ACPI_HKEY_MUTE_MASK = 1 << TP_ACPI_HOTKEYSCAN_MUTE,
1972 TP_ACPI_HKEY_THINKPAD_MASK = 1 << TP_ACPI_HOTKEYSCAN_THINKPAD,
1973 };
1974
1975 enum { /* NVRAM to ACPI HKEY group map */
1976 TP_NVRAM_HKEY_GROUP_HK2 = TP_ACPI_HKEY_THINKPAD_MASK |
1977 TP_ACPI_HKEY_ZOOM_MASK |
1978 TP_ACPI_HKEY_DISPSWTCH_MASK |
1979 TP_ACPI_HKEY_HIBERNATE_MASK,
1980 TP_NVRAM_HKEY_GROUP_BRIGHTNESS = TP_ACPI_HKEY_BRGHTUP_MASK |
1981 TP_ACPI_HKEY_BRGHTDWN_MASK,
1982 TP_NVRAM_HKEY_GROUP_VOLUME = TP_ACPI_HKEY_VOLUP_MASK |
1983 TP_ACPI_HKEY_VOLDWN_MASK |
1984 TP_ACPI_HKEY_MUTE_MASK,
1985 };
1986
1987 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1988 struct tp_nvram_state {
1989 u16 thinkpad_toggle:1;
1990 u16 zoom_toggle:1;
1991 u16 display_toggle:1;
1992 u16 thinklight_toggle:1;
1993 u16 hibernate_toggle:1;
1994 u16 displayexp_toggle:1;
1995 u16 display_state:1;
1996 u16 brightness_toggle:1;
1997 u16 volume_toggle:1;
1998 u16 mute:1;
1999
2000 u8 brightness_level;
2001 u8 volume_level;
2002 };
2003
2004 /* kthread for the hotkey poller */
2005 static struct task_struct *tpacpi_hotkey_task;
2006
2007 /* Acquired while the poller kthread is running, use to sync start/stop */
2008 static struct mutex hotkey_thread_mutex;
2009
2010 /*
2011 * Acquire mutex to write poller control variables as an
2012 * atomic block.
2013 *
2014 * Increment hotkey_config_change when changing them if you
2015 * want the kthread to forget old state.
2016 *
2017 * See HOTKEY_CONFIG_CRITICAL_START/HOTKEY_CONFIG_CRITICAL_END
2018 */
2019 static struct mutex hotkey_thread_data_mutex;
2020 static unsigned int hotkey_config_change;
2021
2022 /*
2023 * hotkey poller control variables
2024 *
2025 * Must be atomic or readers will also need to acquire mutex
2026 *
2027 * HOTKEY_CONFIG_CRITICAL_START/HOTKEY_CONFIG_CRITICAL_END
2028 * should be used only when the changes need to be taken as
2029 * a block, OR when one needs to force the kthread to forget
2030 * old state.
2031 */
2032 static u32 hotkey_source_mask; /* bit mask 0=ACPI,1=NVRAM */
2033 static unsigned int hotkey_poll_freq = 10; /* Hz */
2034
2035 #define HOTKEY_CONFIG_CRITICAL_START \
2036 do { \
2037 mutex_lock(&hotkey_thread_data_mutex); \
2038 hotkey_config_change++; \
2039 } while (0);
2040 #define HOTKEY_CONFIG_CRITICAL_END \
2041 mutex_unlock(&hotkey_thread_data_mutex);
2042
2043 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2044
2045 #define hotkey_source_mask 0U
2046 #define HOTKEY_CONFIG_CRITICAL_START
2047 #define HOTKEY_CONFIG_CRITICAL_END
2048
2049 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2050
2051 static struct mutex hotkey_mutex;
2052
2053 static enum { /* Reasons for waking up */
2054 TP_ACPI_WAKEUP_NONE = 0, /* None or unknown */
2055 TP_ACPI_WAKEUP_BAYEJ, /* Bay ejection request */
2056 TP_ACPI_WAKEUP_UNDOCK, /* Undock request */
2057 } hotkey_wakeup_reason;
2058
2059 static int hotkey_autosleep_ack;
2060
2061 static u32 hotkey_orig_mask; /* events the BIOS had enabled */
2062 static u32 hotkey_all_mask; /* all events supported in fw */
2063 static u32 hotkey_reserved_mask; /* events better left disabled */
2064 static u32 hotkey_driver_mask; /* events needed by the driver */
2065 static u32 hotkey_user_mask; /* events visible to userspace */
2066 static u32 hotkey_acpi_mask; /* events enabled in firmware */
2067
2068 static unsigned int hotkey_report_mode;
2069
2070 static u16 *hotkey_keycode_map;
2071
2072 static struct attribute_set *hotkey_dev_attributes;
2073
2074 static void tpacpi_driver_event(const unsigned int hkey_event);
2075 static void hotkey_driver_event(const unsigned int scancode);
2076
2077 /* HKEY.MHKG() return bits */
2078 #define TP_HOTKEY_TABLET_MASK (1 << 3)
2079
2080 static int hotkey_get_wlsw(void)
2081 {
2082 int status;
2083
2084 if (!tp_features.hotkey_wlsw)
2085 return -ENODEV;
2086
2087 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
2088 if (dbg_wlswemul)
2089 return (tpacpi_wlsw_emulstate) ?
2090 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
2091 #endif
2092
2093 if (!acpi_evalf(hkey_handle, &status, "WLSW", "d"))
2094 return -EIO;
2095
2096 return (status) ? TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
2097 }
2098
2099 static int hotkey_get_tablet_mode(int *status)
2100 {
2101 int s;
2102
2103 if (!acpi_evalf(hkey_handle, &s, "MHKG", "d"))
2104 return -EIO;
2105
2106 *status = ((s & TP_HOTKEY_TABLET_MASK) != 0);
2107 return 0;
2108 }
2109
2110 /*
2111 * Reads current event mask from firmware, and updates
2112 * hotkey_acpi_mask accordingly. Also resets any bits
2113 * from hotkey_user_mask that are unavailable to be
2114 * delivered (shadow requirement of the userspace ABI).
2115 *
2116 * Call with hotkey_mutex held
2117 */
2118 static int hotkey_mask_get(void)
2119 {
2120 if (tp_features.hotkey_mask) {
2121 u32 m = 0;
2122
2123 if (!acpi_evalf(hkey_handle, &m, "DHKN", "d"))
2124 return -EIO;
2125
2126 hotkey_acpi_mask = m;
2127 } else {
2128 /* no mask support doesn't mean no event support... */
2129 hotkey_acpi_mask = hotkey_all_mask;
2130 }
2131
2132 /* sync userspace-visible mask */
2133 hotkey_user_mask &= (hotkey_acpi_mask | hotkey_source_mask);
2134
2135 return 0;
2136 }
2137
2138 void static hotkey_mask_warn_incomplete_mask(void)
2139 {
2140 /* log only what the user can fix... */
2141 const u32 wantedmask = hotkey_driver_mask &
2142 ~(hotkey_acpi_mask | hotkey_source_mask) &
2143 (hotkey_all_mask | TPACPI_HKEY_NVRAM_KNOWN_MASK);
2144
2145 if (wantedmask)
2146 printk(TPACPI_NOTICE
2147 "required events 0x%08x not enabled!\n",
2148 wantedmask);
2149 }
2150
2151 /*
2152 * Set the firmware mask when supported
2153 *
2154 * Also calls hotkey_mask_get to update hotkey_acpi_mask.
2155 *
2156 * NOTE: does not set bits in hotkey_user_mask, but may reset them.
2157 *
2158 * Call with hotkey_mutex held
2159 */
2160 static int hotkey_mask_set(u32 mask)
2161 {
2162 int i;
2163 int rc = 0;
2164
2165 const u32 fwmask = mask & ~hotkey_source_mask;
2166
2167 if (tp_features.hotkey_mask) {
2168 for (i = 0; i < 32; i++) {
2169 if (!acpi_evalf(hkey_handle,
2170 NULL, "MHKM", "vdd", i + 1,
2171 !!(mask & (1 << i)))) {
2172 rc = -EIO;
2173 break;
2174 }
2175 }
2176 }
2177
2178 /*
2179 * We *must* make an inconditional call to hotkey_mask_get to
2180 * refresh hotkey_acpi_mask and update hotkey_user_mask
2181 *
2182 * Take the opportunity to also log when we cannot _enable_
2183 * a given event.
2184 */
2185 if (!hotkey_mask_get() && !rc && (fwmask & ~hotkey_acpi_mask)) {
2186 printk(TPACPI_NOTICE
2187 "asked for hotkey mask 0x%08x, but "
2188 "firmware forced it to 0x%08x\n",
2189 fwmask, hotkey_acpi_mask);
2190 }
2191
2192 if (tpacpi_lifecycle != TPACPI_LIFE_EXITING)
2193 hotkey_mask_warn_incomplete_mask();
2194
2195 return rc;
2196 }
2197
2198 /*
2199 * Sets hotkey_user_mask and tries to set the firmware mask
2200 *
2201 * Call with hotkey_mutex held
2202 */
2203 static int hotkey_user_mask_set(const u32 mask)
2204 {
2205 int rc;
2206
2207 /* Give people a chance to notice they are doing something that
2208 * is bound to go boom on their users sooner or later */
2209 if (!tp_warned.hotkey_mask_ff &&
2210 (mask == 0xffff || mask == 0xffffff ||
2211 mask == 0xffffffff)) {
2212 tp_warned.hotkey_mask_ff = 1;
2213 printk(TPACPI_NOTICE
2214 "setting the hotkey mask to 0x%08x is likely "
2215 "not the best way to go about it\n", mask);
2216 printk(TPACPI_NOTICE
2217 "please consider using the driver defaults, "
2218 "and refer to up-to-date thinkpad-acpi "
2219 "documentation\n");
2220 }
2221
2222 /* Try to enable what the user asked for, plus whatever we need.
2223 * this syncs everything but won't enable bits in hotkey_user_mask */
2224 rc = hotkey_mask_set((mask | hotkey_driver_mask) & ~hotkey_source_mask);
2225
2226 /* Enable the available bits in hotkey_user_mask */
2227 hotkey_user_mask = mask & (hotkey_acpi_mask | hotkey_source_mask);
2228
2229 return rc;
2230 }
2231
2232 /*
2233 * Sets the driver hotkey mask.
2234 *
2235 * Can be called even if the hotkey subdriver is inactive
2236 */
2237 static int tpacpi_hotkey_driver_mask_set(const u32 mask)
2238 {
2239 int rc;
2240
2241 /* Do the right thing if hotkey_init has not been called yet */
2242 if (!tp_features.hotkey) {
2243 hotkey_driver_mask = mask;
2244 return 0;
2245 }
2246
2247 mutex_lock(&hotkey_mutex);
2248
2249 HOTKEY_CONFIG_CRITICAL_START
2250 hotkey_driver_mask = mask;
2251 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2252 hotkey_source_mask |= (mask & ~hotkey_all_mask);
2253 #endif
2254 HOTKEY_CONFIG_CRITICAL_END
2255
2256 rc = hotkey_mask_set((hotkey_acpi_mask | hotkey_driver_mask) &
2257 ~hotkey_source_mask);
2258 mutex_unlock(&hotkey_mutex);
2259
2260 return rc;
2261 }
2262
2263 static int hotkey_status_get(int *status)
2264 {
2265 if (!acpi_evalf(hkey_handle, status, "DHKC", "d"))
2266 return -EIO;
2267
2268 return 0;
2269 }
2270
2271 static int hotkey_status_set(bool enable)
2272 {
2273 if (!acpi_evalf(hkey_handle, NULL, "MHKC", "vd", enable ? 1 : 0))
2274 return -EIO;
2275
2276 return 0;
2277 }
2278
2279 static void tpacpi_input_send_tabletsw(void)
2280 {
2281 int state;
2282
2283 if (tp_features.hotkey_tablet &&
2284 !hotkey_get_tablet_mode(&state)) {
2285 mutex_lock(&tpacpi_inputdev_send_mutex);
2286
2287 input_report_switch(tpacpi_inputdev,
2288 SW_TABLET_MODE, !!state);
2289 input_sync(tpacpi_inputdev);
2290
2291 mutex_unlock(&tpacpi_inputdev_send_mutex);
2292 }
2293 }
2294
2295 /* Do NOT call without validating scancode first */
2296 static void tpacpi_input_send_key(const unsigned int scancode)
2297 {
2298 const unsigned int keycode = hotkey_keycode_map[scancode];
2299
2300 if (keycode != KEY_RESERVED) {
2301 mutex_lock(&tpacpi_inputdev_send_mutex);
2302
2303 input_report_key(tpacpi_inputdev, keycode, 1);
2304 if (keycode == KEY_UNKNOWN)
2305 input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN,
2306 scancode);
2307 input_sync(tpacpi_inputdev);
2308
2309 input_report_key(tpacpi_inputdev, keycode, 0);
2310 if (keycode == KEY_UNKNOWN)
2311 input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN,
2312 scancode);
2313 input_sync(tpacpi_inputdev);
2314
2315 mutex_unlock(&tpacpi_inputdev_send_mutex);
2316 }
2317 }
2318
2319 /* Do NOT call without validating scancode first */
2320 static void tpacpi_input_send_key_masked(const unsigned int scancode)
2321 {
2322 hotkey_driver_event(scancode);
2323 if (hotkey_user_mask & (1 << scancode))
2324 tpacpi_input_send_key(scancode);
2325 }
2326
2327 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2328 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver;
2329
2330 /* Do NOT call without validating scancode first */
2331 static void tpacpi_hotkey_send_key(unsigned int scancode)
2332 {
2333 tpacpi_input_send_key_masked(scancode);
2334 if (hotkey_report_mode < 2) {
2335 acpi_bus_generate_proc_event(ibm_hotkey_acpidriver.device,
2336 0x80, TP_HKEY_EV_HOTKEY_BASE + scancode);
2337 }
2338 }
2339
2340 static void hotkey_read_nvram(struct tp_nvram_state *n, const u32 m)
2341 {
2342 u8 d;
2343
2344 if (m & TP_NVRAM_HKEY_GROUP_HK2) {
2345 d = nvram_read_byte(TP_NVRAM_ADDR_HK2);
2346 n->thinkpad_toggle = !!(d & TP_NVRAM_MASK_HKT_THINKPAD);
2347 n->zoom_toggle = !!(d & TP_NVRAM_MASK_HKT_ZOOM);
2348 n->display_toggle = !!(d & TP_NVRAM_MASK_HKT_DISPLAY);
2349 n->hibernate_toggle = !!(d & TP_NVRAM_MASK_HKT_HIBERNATE);
2350 }
2351 if (m & TP_ACPI_HKEY_THNKLGHT_MASK) {
2352 d = nvram_read_byte(TP_NVRAM_ADDR_THINKLIGHT);
2353 n->thinklight_toggle = !!(d & TP_NVRAM_MASK_THINKLIGHT);
2354 }
2355 if (m & TP_ACPI_HKEY_DISPXPAND_MASK) {
2356 d = nvram_read_byte(TP_NVRAM_ADDR_VIDEO);
2357 n->displayexp_toggle =
2358 !!(d & TP_NVRAM_MASK_HKT_DISPEXPND);
2359 }
2360 if (m & TP_NVRAM_HKEY_GROUP_BRIGHTNESS) {
2361 d = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS);
2362 n->brightness_level = (d & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
2363 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
2364 n->brightness_toggle =
2365 !!(d & TP_NVRAM_MASK_HKT_BRIGHTNESS);
2366 }
2367 if (m & TP_NVRAM_HKEY_GROUP_VOLUME) {
2368 d = nvram_read_byte(TP_NVRAM_ADDR_MIXER);
2369 n->volume_level = (d & TP_NVRAM_MASK_LEVEL_VOLUME)
2370 >> TP_NVRAM_POS_LEVEL_VOLUME;
2371 n->mute = !!(d & TP_NVRAM_MASK_MUTE);
2372 n->volume_toggle = !!(d & TP_NVRAM_MASK_HKT_VOLUME);
2373 }
2374 }
2375
2376 static void hotkey_compare_and_issue_event(struct tp_nvram_state *oldn,
2377 struct tp_nvram_state *newn,
2378 const u32 event_mask)
2379 {
2380
2381 #define TPACPI_COMPARE_KEY(__scancode, __member) \
2382 do { \
2383 if ((event_mask & (1 << __scancode)) && \
2384 oldn->__member != newn->__member) \
2385 tpacpi_hotkey_send_key(__scancode); \
2386 } while (0)
2387
2388 #define TPACPI_MAY_SEND_KEY(__scancode) \
2389 do { \
2390 if (event_mask & (1 << __scancode)) \
2391 tpacpi_hotkey_send_key(__scancode); \
2392 } while (0)
2393
2394 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_THINKPAD, thinkpad_toggle);
2395 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNSPACE, zoom_toggle);
2396 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF7, display_toggle);
2397 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF12, hibernate_toggle);
2398
2399 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNPAGEUP, thinklight_toggle);
2400
2401 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF8, displayexp_toggle);
2402
2403 /* handle volume */
2404 if (oldn->volume_toggle != newn->volume_toggle) {
2405 if (oldn->mute != newn->mute) {
2406 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE);
2407 }
2408 if (oldn->volume_level > newn->volume_level) {
2409 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
2410 } else if (oldn->volume_level < newn->volume_level) {
2411 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
2412 } else if (oldn->mute == newn->mute) {
2413 /* repeated key presses that didn't change state */
2414 if (newn->mute) {
2415 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE);
2416 } else if (newn->volume_level != 0) {
2417 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
2418 } else {
2419 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
2420 }
2421 }
2422 }
2423
2424 /* handle brightness */
2425 if (oldn->brightness_toggle != newn->brightness_toggle) {
2426 if (oldn->brightness_level < newn->brightness_level) {
2427 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
2428 } else if (oldn->brightness_level > newn->brightness_level) {
2429 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
2430 } else {
2431 /* repeated key presses that didn't change state */
2432 if (newn->brightness_level != 0) {
2433 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
2434 } else {
2435 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
2436 }
2437 }
2438 }
2439
2440 #undef TPACPI_COMPARE_KEY
2441 #undef TPACPI_MAY_SEND_KEY
2442 }
2443
2444 /*
2445 * Polling driver
2446 *
2447 * We track all events in hotkey_source_mask all the time, since
2448 * most of them are edge-based. We only issue those requested by
2449 * hotkey_user_mask or hotkey_driver_mask, though.
2450 */
2451 static int hotkey_kthread(void *data)
2452 {
2453 struct tp_nvram_state s[2];
2454 u32 poll_mask, event_mask;
2455 unsigned int si, so;
2456 unsigned long t;
2457 unsigned int change_detector, must_reset;
2458 unsigned int poll_freq;
2459
2460 mutex_lock(&hotkey_thread_mutex);
2461
2462 if (tpacpi_lifecycle == TPACPI_LIFE_EXITING)
2463 goto exit;
2464
2465 set_freezable();
2466
2467 so = 0;
2468 si = 1;
2469 t = 0;
2470
2471 /* Initial state for compares */
2472 mutex_lock(&hotkey_thread_data_mutex);
2473 change_detector = hotkey_config_change;
2474 poll_mask = hotkey_source_mask;
2475 event_mask = hotkey_source_mask &
2476 (hotkey_driver_mask | hotkey_user_mask);
2477 poll_freq = hotkey_poll_freq;
2478 mutex_unlock(&hotkey_thread_data_mutex);
2479 hotkey_read_nvram(&s[so], poll_mask);
2480
2481 while (!kthread_should_stop()) {
2482 if (t == 0) {
2483 if (likely(poll_freq))
2484 t = 1000/poll_freq;
2485 else
2486 t = 100; /* should never happen... */
2487 }
2488 t = msleep_interruptible(t);
2489 if (unlikely(kthread_should_stop()))
2490 break;
2491 must_reset = try_to_freeze();
2492 if (t > 0 && !must_reset)
2493 continue;
2494
2495 mutex_lock(&hotkey_thread_data_mutex);
2496 if (must_reset || hotkey_config_change != change_detector) {
2497 /* forget old state on thaw or config change */
2498 si = so;
2499 t = 0;
2500 change_detector = hotkey_config_change;
2501 }
2502 poll_mask = hotkey_source_mask;
2503 event_mask = hotkey_source_mask &
2504 (hotkey_driver_mask | hotkey_user_mask);
2505 poll_freq = hotkey_poll_freq;
2506 mutex_unlock(&hotkey_thread_data_mutex);
2507
2508 if (likely(poll_mask)) {
2509 hotkey_read_nvram(&s[si], poll_mask);
2510 if (likely(si != so)) {
2511 hotkey_compare_and_issue_event(&s[so], &s[si],
2512 event_mask);
2513 }
2514 }
2515
2516 so = si;
2517 si ^= 1;
2518 }
2519
2520 exit:
2521 mutex_unlock(&hotkey_thread_mutex);
2522 return 0;
2523 }
2524
2525 /* call with hotkey_mutex held */
2526 static void hotkey_poll_stop_sync(void)
2527 {
2528 if (tpacpi_hotkey_task) {
2529 if (frozen(tpacpi_hotkey_task) ||
2530 freezing(tpacpi_hotkey_task))
2531 thaw_process(tpacpi_hotkey_task);
2532
2533 kthread_stop(tpacpi_hotkey_task);
2534 tpacpi_hotkey_task = NULL;
2535 mutex_lock(&hotkey_thread_mutex);
2536 /* at this point, the thread did exit */
2537 mutex_unlock(&hotkey_thread_mutex);
2538 }
2539 }
2540
2541 /* call with hotkey_mutex held */
2542 static void hotkey_poll_setup(bool may_warn)
2543 {
2544 const u32 poll_driver_mask = hotkey_driver_mask & hotkey_source_mask;
2545 const u32 poll_user_mask = hotkey_user_mask & hotkey_source_mask;
2546
2547 if (hotkey_poll_freq > 0 &&
2548 (poll_driver_mask ||
2549 (poll_user_mask && tpacpi_inputdev->users > 0))) {
2550 if (!tpacpi_hotkey_task) {
2551 tpacpi_hotkey_task = kthread_run(hotkey_kthread,
2552 NULL, TPACPI_NVRAM_KTHREAD_NAME);
2553 if (IS_ERR(tpacpi_hotkey_task)) {
2554 tpacpi_hotkey_task = NULL;
2555 printk(TPACPI_ERR
2556 "could not create kernel thread "
2557 "for hotkey polling\n");
2558 }
2559 }
2560 } else {
2561 hotkey_poll_stop_sync();
2562 if (may_warn && (poll_driver_mask || poll_user_mask) &&
2563 hotkey_poll_freq == 0) {
2564 printk(TPACPI_NOTICE
2565 "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(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_safe(bool __unused)
2592 {
2593 }
2594
2595 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2596
2597 static int hotkey_inputdev_open(struct input_dev *dev)
2598 {
2599 switch (tpacpi_lifecycle) {
2600 case TPACPI_LIFE_INIT:
2601 /*
2602 * hotkey_init will call hotkey_poll_setup_safe
2603 * at the appropriate moment
2604 */
2605 return 0;
2606 case TPACPI_LIFE_EXITING:
2607 return -EBUSY;
2608 case TPACPI_LIFE_RUNNING:
2609 hotkey_poll_setup_safe(false);
2610 return 0;
2611 }
2612
2613 /* Should only happen if tpacpi_lifecycle is corrupt */
2614 BUG();
2615 return -EBUSY;
2616 }
2617
2618 static void hotkey_inputdev_close(struct input_dev *dev)
2619 {
2620 /* disable hotkey polling when possible */
2621 if (tpacpi_lifecycle == TPACPI_LIFE_RUNNING &&
2622 !(hotkey_source_mask & hotkey_driver_mask))
2623 hotkey_poll_setup_safe(false);
2624 }
2625
2626 /* sysfs hotkey enable ------------------------------------------------- */
2627 static ssize_t hotkey_enable_show(struct device *dev,
2628 struct device_attribute *attr,
2629 char *buf)
2630 {
2631 int res, status;
2632
2633 printk_deprecated_attribute("hotkey_enable",
2634 "Hotkey reporting is always enabled");
2635
2636 res = hotkey_status_get(&status);
2637 if (res)
2638 return res;
2639
2640 return snprintf(buf, PAGE_SIZE, "%d\n", status);
2641 }
2642
2643 static ssize_t hotkey_enable_store(struct device *dev,
2644 struct device_attribute *attr,
2645 const char *buf, size_t count)
2646 {
2647 unsigned long t;
2648
2649 printk_deprecated_attribute("hotkey_enable",
2650 "Hotkeys can be disabled through hotkey_mask");
2651
2652 if (parse_strtoul(buf, 1, &t))
2653 return -EINVAL;
2654
2655 if (t == 0)
2656 return -EPERM;
2657
2658 return count;
2659 }
2660
2661 static struct device_attribute dev_attr_hotkey_enable =
2662 __ATTR(hotkey_enable, S_IWUSR | S_IRUGO,
2663 hotkey_enable_show, hotkey_enable_store);
2664
2665 /* sysfs hotkey mask --------------------------------------------------- */
2666 static ssize_t hotkey_mask_show(struct device *dev,
2667 struct device_attribute *attr,
2668 char *buf)
2669 {
2670 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_user_mask);
2671 }
2672
2673 static ssize_t hotkey_mask_store(struct device *dev,
2674 struct device_attribute *attr,
2675 const char *buf, size_t count)
2676 {
2677 unsigned long t;
2678 int res;
2679
2680 if (parse_strtoul(buf, 0xffffffffUL, &t))
2681 return -EINVAL;
2682
2683 if (mutex_lock_killable(&hotkey_mutex))
2684 return -ERESTARTSYS;
2685
2686 res = hotkey_user_mask_set(t);
2687
2688 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2689 hotkey_poll_setup(true);
2690 #endif
2691
2692 mutex_unlock(&hotkey_mutex);
2693
2694 tpacpi_disclose_usertask("hotkey_mask", "set to 0x%08lx\n", t);
2695
2696 return (res) ? res : count;
2697 }
2698
2699 static struct device_attribute dev_attr_hotkey_mask =
2700 __ATTR(hotkey_mask, S_IWUSR | S_IRUGO,
2701 hotkey_mask_show, hotkey_mask_store);
2702
2703 /* sysfs hotkey bios_enabled ------------------------------------------- */
2704 static ssize_t hotkey_bios_enabled_show(struct device *dev,
2705 struct device_attribute *attr,
2706 char *buf)
2707 {
2708 return sprintf(buf, "0\n");
2709 }
2710
2711 static struct device_attribute dev_attr_hotkey_bios_enabled =
2712 __ATTR(hotkey_bios_enabled, S_IRUGO, hotkey_bios_enabled_show, NULL);
2713
2714 /* sysfs hotkey bios_mask ---------------------------------------------- */
2715 static ssize_t hotkey_bios_mask_show(struct device *dev,
2716 struct device_attribute *attr,
2717 char *buf)
2718 {
2719 printk_deprecated_attribute("hotkey_bios_mask",
2720 "This attribute is useless.");
2721 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_orig_mask);
2722 }
2723
2724 static struct device_attribute dev_attr_hotkey_bios_mask =
2725 __ATTR(hotkey_bios_mask, S_IRUGO, hotkey_bios_mask_show, NULL);
2726
2727 /* sysfs hotkey all_mask ----------------------------------------------- */
2728 static ssize_t hotkey_all_mask_show(struct device *dev,
2729 struct device_attribute *attr,
2730 char *buf)
2731 {
2732 return snprintf(buf, PAGE_SIZE, "0x%08x\n",
2733 hotkey_all_mask | hotkey_source_mask);
2734 }
2735
2736 static struct device_attribute dev_attr_hotkey_all_mask =
2737 __ATTR(hotkey_all_mask, S_IRUGO, hotkey_all_mask_show, NULL);
2738
2739 /* sysfs hotkey recommended_mask --------------------------------------- */
2740 static ssize_t hotkey_recommended_mask_show(struct device *dev,
2741 struct device_attribute *attr,
2742 char *buf)
2743 {
2744 return snprintf(buf, PAGE_SIZE, "0x%08x\n",
2745 (hotkey_all_mask | hotkey_source_mask)
2746 & ~hotkey_reserved_mask);
2747 }
2748
2749 static struct device_attribute dev_attr_hotkey_recommended_mask =
2750 __ATTR(hotkey_recommended_mask, S_IRUGO,
2751 hotkey_recommended_mask_show, NULL);
2752
2753 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2754
2755 /* sysfs hotkey hotkey_source_mask ------------------------------------- */
2756 static ssize_t hotkey_source_mask_show(struct device *dev,
2757 struct device_attribute *attr,
2758 char *buf)
2759 {
2760 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_source_mask);
2761 }
2762
2763 static ssize_t hotkey_source_mask_store(struct device *dev,
2764 struct device_attribute *attr,
2765 const char *buf, size_t count)
2766 {
2767 unsigned long t;
2768 u32 r_ev;
2769 int rc;
2770
2771 if (parse_strtoul(buf, 0xffffffffUL, &t) ||
2772 ((t & ~TPACPI_HKEY_NVRAM_KNOWN_MASK) != 0))
2773 return -EINVAL;
2774
2775 if (mutex_lock_killable(&hotkey_mutex))
2776 return -ERESTARTSYS;
2777
2778 HOTKEY_CONFIG_CRITICAL_START
2779 hotkey_source_mask = t;
2780 HOTKEY_CONFIG_CRITICAL_END
2781
2782 rc = hotkey_mask_set((hotkey_user_mask | hotkey_driver_mask) &
2783 ~hotkey_source_mask);
2784 hotkey_poll_setup(true);
2785
2786 /* check if events needed by the driver got disabled */
2787 r_ev = hotkey_driver_mask & ~(hotkey_acpi_mask & hotkey_all_mask)
2788 & ~hotkey_source_mask & TPACPI_HKEY_NVRAM_KNOWN_MASK;
2789
2790 mutex_unlock(&hotkey_mutex);
2791
2792 if (rc < 0)
2793 printk(TPACPI_ERR "hotkey_source_mask: failed to update the"
2794 "firmware event mask!\n");
2795
2796 if (r_ev)
2797 printk(TPACPI_NOTICE "hotkey_source_mask: "
2798 "some important events were disabled: "
2799 "0x%04x\n", r_ev);
2800
2801 tpacpi_disclose_usertask("hotkey_source_mask", "set to 0x%08lx\n", t);
2802
2803 return (rc < 0) ? rc : count;
2804 }
2805
2806 static struct device_attribute dev_attr_hotkey_source_mask =
2807 __ATTR(hotkey_source_mask, S_IWUSR | S_IRUGO,
2808 hotkey_source_mask_show, hotkey_source_mask_store);
2809
2810 /* sysfs hotkey hotkey_poll_freq --------------------------------------- */
2811 static ssize_t hotkey_poll_freq_show(struct device *dev,
2812 struct device_attribute *attr,
2813 char *buf)
2814 {
2815 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_poll_freq);
2816 }
2817
2818 static ssize_t hotkey_poll_freq_store(struct device *dev,
2819 struct device_attribute *attr,
2820 const char *buf, size_t count)
2821 {
2822 unsigned long t;
2823
2824 if (parse_strtoul(buf, 25, &t))
2825 return -EINVAL;
2826
2827 if (mutex_lock_killable(&hotkey_mutex))
2828 return -ERESTARTSYS;
2829
2830 hotkey_poll_set_freq(t);
2831 hotkey_poll_setup(true);
2832
2833 mutex_unlock(&hotkey_mutex);
2834
2835 tpacpi_disclose_usertask("hotkey_poll_freq", "set to %lu\n", t);
2836
2837 return count;
2838 }
2839
2840 static struct device_attribute dev_attr_hotkey_poll_freq =
2841 __ATTR(hotkey_poll_freq, S_IWUSR | S_IRUGO,
2842 hotkey_poll_freq_show, hotkey_poll_freq_store);
2843
2844 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2845
2846 /* sysfs hotkey radio_sw (pollable) ------------------------------------ */
2847 static ssize_t hotkey_radio_sw_show(struct device *dev,
2848 struct device_attribute *attr,
2849 char *buf)
2850 {
2851 int res;
2852 res = hotkey_get_wlsw();
2853 if (res < 0)
2854 return res;
2855
2856 /* Opportunistic update */
2857 tpacpi_rfk_update_hwblock_state((res == TPACPI_RFK_RADIO_OFF));
2858
2859 return snprintf(buf, PAGE_SIZE, "%d\n",
2860 (res == TPACPI_RFK_RADIO_OFF) ? 0 : 1);
2861 }
2862
2863 static struct device_attribute dev_attr_hotkey_radio_sw =
2864 __ATTR(hotkey_radio_sw, S_IRUGO, hotkey_radio_sw_show, NULL);
2865
2866 static void hotkey_radio_sw_notify_change(void)
2867 {
2868 if (tp_features.hotkey_wlsw)
2869 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2870 "hotkey_radio_sw");
2871 }
2872
2873 /* sysfs hotkey tablet mode (pollable) --------------------------------- */
2874 static ssize_t hotkey_tablet_mode_show(struct device *dev,
2875 struct device_attribute *attr,
2876 char *buf)
2877 {
2878 int res, s;
2879 res = hotkey_get_tablet_mode(&s);
2880 if (res < 0)
2881 return res;
2882
2883 return snprintf(buf, PAGE_SIZE, "%d\n", !!s);
2884 }
2885
2886 static struct device_attribute dev_attr_hotkey_tablet_mode =
2887 __ATTR(hotkey_tablet_mode, S_IRUGO, hotkey_tablet_mode_show, NULL);
2888
2889 static void hotkey_tablet_mode_notify_change(void)
2890 {
2891 if (tp_features.hotkey_tablet)
2892 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2893 "hotkey_tablet_mode");
2894 }
2895
2896 /* sysfs hotkey report_mode -------------------------------------------- */
2897 static ssize_t hotkey_report_mode_show(struct device *dev,
2898 struct device_attribute *attr,
2899 char *buf)
2900 {
2901 return snprintf(buf, PAGE_SIZE, "%d\n",
2902 (hotkey_report_mode != 0) ? hotkey_report_mode : 1);
2903 }
2904
2905 static struct device_attribute dev_attr_hotkey_report_mode =
2906 __ATTR(hotkey_report_mode, S_IRUGO, hotkey_report_mode_show, NULL);
2907
2908 /* sysfs wakeup reason (pollable) -------------------------------------- */
2909 static ssize_t hotkey_wakeup_reason_show(struct device *dev,
2910 struct device_attribute *attr,
2911 char *buf)
2912 {
2913 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_wakeup_reason);
2914 }
2915
2916 static struct device_attribute dev_attr_hotkey_wakeup_reason =
2917 __ATTR(wakeup_reason, S_IRUGO, hotkey_wakeup_reason_show, NULL);
2918
2919 static void hotkey_wakeup_reason_notify_change(void)
2920 {
2921 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2922 "wakeup_reason");
2923 }
2924
2925 /* sysfs wakeup hotunplug_complete (pollable) -------------------------- */
2926 static ssize_t hotkey_wakeup_hotunplug_complete_show(struct device *dev,
2927 struct device_attribute *attr,
2928 char *buf)
2929 {
2930 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_autosleep_ack);
2931 }
2932
2933 static struct device_attribute dev_attr_hotkey_wakeup_hotunplug_complete =
2934 __ATTR(wakeup_hotunplug_complete, S_IRUGO,
2935 hotkey_wakeup_hotunplug_complete_show, NULL);
2936
2937 static void hotkey_wakeup_hotunplug_complete_notify_change(void)
2938 {
2939 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2940 "wakeup_hotunplug_complete");
2941 }
2942
2943 /* --------------------------------------------------------------------- */
2944
2945 static struct attribute *hotkey_attributes[] __initdata = {
2946 &dev_attr_hotkey_enable.attr,
2947 &dev_attr_hotkey_bios_enabled.attr,
2948 &dev_attr_hotkey_bios_mask.attr,
2949 &dev_attr_hotkey_report_mode.attr,
2950 &dev_attr_hotkey_wakeup_reason.attr,
2951 &dev_attr_hotkey_wakeup_hotunplug_complete.attr,
2952 &dev_attr_hotkey_mask.attr,
2953 &dev_attr_hotkey_all_mask.attr,
2954 &dev_attr_hotkey_recommended_mask.attr,
2955 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2956 &dev_attr_hotkey_source_mask.attr,
2957 &dev_attr_hotkey_poll_freq.attr,
2958 #endif
2959 };
2960
2961 /*
2962 * Sync both the hw and sw blocking state of all switches
2963 */
2964 static void tpacpi_send_radiosw_update(void)
2965 {
2966 int wlsw;
2967
2968 /*
2969 * We must sync all rfkill controllers *before* issuing any
2970 * rfkill input events, or we will race the rfkill core input
2971 * handler.
2972 *
2973 * tpacpi_inputdev_send_mutex works as a syncronization point
2974 * for the above.
2975 *
2976 * We optimize to avoid numerous calls to hotkey_get_wlsw.
2977 */
2978
2979 wlsw = hotkey_get_wlsw();
2980
2981 /* Sync hw blocking state first if it is hw-blocked */
2982 if (wlsw == TPACPI_RFK_RADIO_OFF)
2983 tpacpi_rfk_update_hwblock_state(true);
2984
2985 /* Sync sw blocking state */
2986 tpacpi_rfk_update_swstate_all();
2987
2988 /* Sync hw blocking state last if it is hw-unblocked */
2989 if (wlsw == TPACPI_RFK_RADIO_ON)
2990 tpacpi_rfk_update_hwblock_state(false);
2991
2992 /* Issue rfkill input event for WLSW switch */
2993 if (!(wlsw < 0)) {
2994 mutex_lock(&tpacpi_inputdev_send_mutex);
2995
2996 input_report_switch(tpacpi_inputdev,
2997 SW_RFKILL_ALL, (wlsw > 0));
2998 input_sync(tpacpi_inputdev);
2999
3000 mutex_unlock(&tpacpi_inputdev_send_mutex);
3001 }
3002
3003 /*
3004 * this can be unconditional, as we will poll state again
3005 * if userspace uses the notify to read data
3006 */
3007 hotkey_radio_sw_notify_change();
3008 }
3009
3010 static void hotkey_exit(void)
3011 {
3012 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
3013 mutex_lock(&hotkey_mutex);
3014 hotkey_poll_stop_sync();
3015 mutex_unlock(&hotkey_mutex);
3016 #endif
3017
3018 if (hotkey_dev_attributes)
3019 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
3020
3021 kfree(hotkey_keycode_map);
3022
3023 dbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_HKEY,
3024 "restoring original HKEY status and mask\n");
3025 /* yes, there is a bitwise or below, we want the
3026 * functions to be called even if one of them fail */
3027 if (((tp_features.hotkey_mask &&
3028 hotkey_mask_set(hotkey_orig_mask)) |
3029 hotkey_status_set(false)) != 0)
3030 printk(TPACPI_ERR
3031 "failed to restore hot key mask "
3032 "to BIOS defaults\n");
3033 }
3034
3035 static void __init hotkey_unmap(const unsigned int scancode)
3036 {
3037 if (hotkey_keycode_map[scancode] != KEY_RESERVED) {
3038 clear_bit(hotkey_keycode_map[scancode],
3039 tpacpi_inputdev->keybit);
3040 hotkey_keycode_map[scancode] = KEY_RESERVED;
3041 }
3042 }
3043
3044 /*
3045 * HKEY quirks:
3046 * TPACPI_HK_Q_INIMASK: Supports FN+F3,FN+F4,FN+F12
3047 */
3048
3049 #define TPACPI_HK_Q_INIMASK 0x0001
3050
3051 static const struct tpacpi_quirk tpacpi_hotkey_qtable[] __initconst = {
3052 TPACPI_Q_IBM('I', 'H', TPACPI_HK_Q_INIMASK), /* 600E */
3053 TPACPI_Q_IBM('I', 'N', TPACPI_HK_Q_INIMASK), /* 600E */
3054 TPACPI_Q_IBM('I', 'D', TPACPI_HK_Q_INIMASK), /* 770, 770E, 770ED */
3055 TPACPI_Q_IBM('I', 'W', TPACPI_HK_Q_INIMASK), /* A20m */
3056 TPACPI_Q_IBM('I', 'V', TPACPI_HK_Q_INIMASK), /* A20p */
3057 TPACPI_Q_IBM('1', '0', TPACPI_HK_Q_INIMASK), /* A21e, A22e */
3058 TPACPI_Q_IBM('K', 'U', TPACPI_HK_Q_INIMASK), /* A21e */
3059 TPACPI_Q_IBM('K', 'X', TPACPI_HK_Q_INIMASK), /* A21m, A22m */
3060 TPACPI_Q_IBM('K', 'Y', TPACPI_HK_Q_INIMASK), /* A21p, A22p */
3061 TPACPI_Q_IBM('1', 'B', TPACPI_HK_Q_INIMASK), /* A22e */
3062 TPACPI_Q_IBM('1', '3', TPACPI_HK_Q_INIMASK), /* A22m */
3063 TPACPI_Q_IBM('1', 'E', TPACPI_HK_Q_INIMASK), /* A30/p (0) */
3064 TPACPI_Q_IBM('1', 'C', TPACPI_HK_Q_INIMASK), /* R30 */
3065 TPACPI_Q_IBM('1', 'F', TPACPI_HK_Q_INIMASK), /* R31 */
3066 TPACPI_Q_IBM('I', 'Y', TPACPI_HK_Q_INIMASK), /* T20 */
3067 TPACPI_Q_IBM('K', 'Z', TPACPI_HK_Q_INIMASK), /* T21 */
3068 TPACPI_Q_IBM('1', '6', TPACPI_HK_Q_INIMASK), /* T22 */
3069 TPACPI_Q_IBM('I', 'Z', TPACPI_HK_Q_INIMASK), /* X20, X21 */
3070 TPACPI_Q_IBM('1', 'D', TPACPI_HK_Q_INIMASK), /* X22, X23, X24 */
3071 };
3072
3073 static int __init hotkey_init(struct ibm_init_struct *iibm)
3074 {
3075 /* Requirements for changing the default keymaps:
3076 *
3077 * 1. Many of the keys are mapped to KEY_RESERVED for very
3078 * good reasons. Do not change them unless you have deep
3079 * knowledge on the IBM and Lenovo ThinkPad firmware for
3080 * the various ThinkPad models. The driver behaves
3081 * differently for KEY_RESERVED: such keys have their
3082 * hot key mask *unset* in mask_recommended, and also
3083 * in the initial hot key mask programmed into the
3084 * firmware at driver load time, which means the firm-
3085 * ware may react very differently if you change them to
3086 * something else;
3087 *
3088 * 2. You must be subscribed to the linux-thinkpad and
3089 * ibm-acpi-devel mailing lists, and you should read the
3090 * list archives since 2007 if you want to change the
3091 * keymaps. This requirement exists so that you will
3092 * know the past history of problems with the thinkpad-
3093 * acpi driver keymaps, and also that you will be
3094 * listening to any bug reports;
3095 *
3096 * 3. Do not send thinkpad-acpi specific patches directly to
3097 * for merging, *ever*. Send them to the linux-acpi
3098 * mailinglist for comments. Merging is to be done only
3099 * through acpi-test and the ACPI maintainer.
3100 *
3101 * If the above is too much to ask, don't change the keymap.
3102 * Ask the thinkpad-acpi maintainer to do it, instead.
3103 */
3104 static u16 ibm_keycode_map[] __initdata = {
3105 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
3106 KEY_FN_F1, KEY_FN_F2, KEY_COFFEE, KEY_SLEEP,
3107 KEY_WLAN, KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
3108 KEY_FN_F9, KEY_FN_F10, KEY_FN_F11, KEY_SUSPEND,
3109
3110 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
3111 KEY_UNKNOWN, /* 0x0C: FN+BACKSPACE */
3112 KEY_UNKNOWN, /* 0x0D: FN+INSERT */
3113 KEY_UNKNOWN, /* 0x0E: FN+DELETE */
3114
3115 /* brightness: firmware always reacts to them */
3116 KEY_RESERVED, /* 0x0F: FN+HOME (brightness up) */
3117 KEY_RESERVED, /* 0x10: FN+END (brightness down) */
3118
3119 /* Thinklight: firmware always react to it */
3120 KEY_RESERVED, /* 0x11: FN+PGUP (thinklight toggle) */
3121
3122 KEY_UNKNOWN, /* 0x12: FN+PGDOWN */
3123 KEY_ZOOM, /* 0x13: FN+SPACE (zoom) */
3124
3125 /* Volume: firmware always react to it and reprograms
3126 * the built-in *extra* mixer. Never map it to control
3127 * another mixer by default. */
3128 KEY_RESERVED, /* 0x14: VOLUME UP */
3129 KEY_RESERVED, /* 0x15: VOLUME DOWN */
3130 KEY_RESERVED, /* 0x16: MUTE */
3131
3132 KEY_VENDOR, /* 0x17: Thinkpad/AccessIBM/Lenovo */
3133
3134 /* (assignments unknown, please report if found) */
3135 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3136 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3137 };
3138 static u16 lenovo_keycode_map[] __initdata = {
3139 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
3140 KEY_FN_F1, KEY_COFFEE, KEY_BATTERY, KEY_SLEEP,
3141 KEY_WLAN, KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
3142 KEY_FN_F9, KEY_FN_F10, KEY_FN_F11, KEY_SUSPEND,
3143
3144 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
3145 KEY_UNKNOWN, /* 0x0C: FN+BACKSPACE */
3146 KEY_UNKNOWN, /* 0x0D: FN+INSERT */
3147 KEY_UNKNOWN, /* 0x0E: FN+DELETE */
3148
3149 /* These should be enabled --only-- when ACPI video
3150 * is disabled (i.e. in "vendor" mode), and are handled
3151 * in a special way by the init code */
3152 KEY_BRIGHTNESSUP, /* 0x0F: FN+HOME (brightness up) */
3153 KEY_BRIGHTNESSDOWN, /* 0x10: FN+END (brightness down) */
3154
3155 KEY_RESERVED, /* 0x11: FN+PGUP (thinklight toggle) */
3156
3157 KEY_UNKNOWN, /* 0x12: FN+PGDOWN */
3158 KEY_ZOOM, /* 0x13: FN+SPACE (zoom) */
3159
3160 /* Volume: z60/z61, T60 (BIOS version?): firmware always
3161 * react to it and reprograms the built-in *extra* mixer.
3162 * Never map it to control another mixer by default.
3163 *
3164 * T60?, T61, R60?, R61: firmware and EC tries to send
3165 * these over the regular keyboard, so these are no-ops,
3166 * but there are still weird bugs re. MUTE, so do not
3167 * change unless you get test reports from all Lenovo
3168 * models. May cause the BIOS to interfere with the
3169 * HDA mixer.
3170 */
3171 KEY_RESERVED, /* 0x14: VOLUME UP */
3172 KEY_RESERVED, /* 0x15: VOLUME DOWN */
3173 KEY_RESERVED, /* 0x16: MUTE */
3174
3175 KEY_VENDOR, /* 0x17: Thinkpad/AccessIBM/Lenovo */
3176
3177 /* (assignments unknown, please report if found) */
3178 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3179 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3180 };
3181
3182 #define TPACPI_HOTKEY_MAP_LEN ARRAY_SIZE(ibm_keycode_map)
3183 #define TPACPI_HOTKEY_MAP_SIZE sizeof(ibm_keycode_map)
3184 #define TPACPI_HOTKEY_MAP_TYPESIZE sizeof(ibm_keycode_map[0])
3185
3186 int res, i;
3187 int status;
3188 int hkeyv;
3189
3190 unsigned long quirks;
3191
3192 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3193 "initializing hotkey subdriver\n");
3194
3195 BUG_ON(!tpacpi_inputdev);
3196 BUG_ON(tpacpi_inputdev->open != NULL ||
3197 tpacpi_inputdev->close != NULL);
3198
3199 TPACPI_ACPIHANDLE_INIT(hkey);
3200 mutex_init(&hotkey_mutex);
3201
3202 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
3203 mutex_init(&hotkey_thread_mutex);
3204 mutex_init(&hotkey_thread_data_mutex);
3205 #endif
3206
3207 /* hotkey not supported on 570 */
3208 tp_features.hotkey = hkey_handle != NULL;
3209
3210 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3211 "hotkeys are %s\n",
3212 str_supported(tp_features.hotkey));
3213
3214 if (!tp_features.hotkey)
3215 return 1;
3216
3217 quirks = tpacpi_check_quirks(tpacpi_hotkey_qtable,
3218 ARRAY_SIZE(tpacpi_hotkey_qtable));
3219
3220 tpacpi_disable_brightness_delay();
3221
3222 /* MUST have enough space for all attributes to be added to
3223 * hotkey_dev_attributes */
3224 hotkey_dev_attributes = create_attr_set(
3225 ARRAY_SIZE(hotkey_attributes) + 2,
3226 NULL);
3227 if (!hotkey_dev_attributes)
3228 return -ENOMEM;
3229 res = add_many_to_attr_set(hotkey_dev_attributes,
3230 hotkey_attributes,
3231 ARRAY_SIZE(hotkey_attributes));
3232 if (res)
3233 goto err_exit;
3234
3235 /* mask not supported on 600e/x, 770e, 770x, A21e, A2xm/p,
3236 A30, R30, R31, T20-22, X20-21, X22-24. Detected by checking
3237 for HKEY interface version 0x100 */
3238 if (acpi_evalf(hkey_handle, &hkeyv, "MHKV", "qd")) {
3239 if ((hkeyv >> 8) != 1) {
3240 printk(TPACPI_ERR "unknown version of the "
3241 "HKEY interface: 0x%x\n", hkeyv);
3242 printk(TPACPI_ERR "please report this to %s\n",
3243 TPACPI_MAIL);
3244 } else {
3245 /*
3246 * MHKV 0x100 in A31, R40, R40e,
3247 * T4x, X31, and later
3248 */
3249 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3250 "firmware HKEY interface version: 0x%x\n",
3251 hkeyv);
3252
3253 /* Paranoia check AND init hotkey_all_mask */
3254 if (!acpi_evalf(hkey_handle, &hotkey_all_mask,
3255 "MHKA", "qd")) {
3256 printk(TPACPI_ERR
3257 "missing MHKA handler, "
3258 "please report this to %s\n",
3259 TPACPI_MAIL);
3260 /* Fallback: pre-init for FN+F3,F4,F12 */
3261 hotkey_all_mask = 0x080cU;
3262 } else {
3263 tp_features.hotkey_mask = 1;
3264 }
3265 }
3266 }
3267
3268 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3269 "hotkey masks are %s\n",
3270 str_supported(tp_features.hotkey_mask));
3271
3272 /* Init hotkey_all_mask if not initialized yet */
3273 if (!tp_features.hotkey_mask && !hotkey_all_mask &&
3274 (quirks & TPACPI_HK_Q_INIMASK))
3275 hotkey_all_mask = 0x080cU; /* FN+F12, FN+F4, FN+F3 */
3276
3277 /* Init hotkey_acpi_mask and hotkey_orig_mask */
3278 if (tp_features.hotkey_mask) {
3279 /* hotkey_source_mask *must* be zero for
3280 * the first hotkey_mask_get to return hotkey_orig_mask */
3281 res = hotkey_mask_get();
3282 if (res)
3283 goto err_exit;
3284
3285 hotkey_orig_mask = hotkey_acpi_mask;
3286 } else {
3287 hotkey_orig_mask = hotkey_all_mask;
3288 hotkey_acpi_mask = hotkey_all_mask;
3289 }
3290
3291 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3292 if (dbg_wlswemul) {
3293 tp_features.hotkey_wlsw = 1;
3294 printk(TPACPI_INFO
3295 "radio switch emulation enabled\n");
3296 } else
3297 #endif
3298 /* Not all thinkpads have a hardware radio switch */
3299 if (acpi_evalf(hkey_handle, &status, "WLSW", "qd")) {
3300 tp_features.hotkey_wlsw = 1;
3301 printk(TPACPI_INFO
3302 "radio switch found; radios are %s\n",
3303 enabled(status, 0));
3304 }
3305 if (tp_features.hotkey_wlsw)
3306 res = add_to_attr_set(hotkey_dev_attributes,
3307 &dev_attr_hotkey_radio_sw.attr);
3308
3309 /* For X41t, X60t, X61t Tablets... */
3310 if (!res && acpi_evalf(hkey_handle, &status, "MHKG", "qd")) {
3311 tp_features.hotkey_tablet = 1;
3312 printk(TPACPI_INFO
3313 "possible tablet mode switch found; "
3314 "ThinkPad in %s mode\n",
3315 (status & TP_HOTKEY_TABLET_MASK)?
3316 "tablet" : "laptop");
3317 res = add_to_attr_set(hotkey_dev_attributes,
3318 &dev_attr_hotkey_tablet_mode.attr);
3319 }
3320
3321 if (!res)
3322 res = register_attr_set_with_sysfs(
3323 hotkey_dev_attributes,
3324 &tpacpi_pdev->dev.kobj);
3325 if (res)
3326 goto err_exit;
3327
3328 /* Set up key map */
3329
3330 hotkey_keycode_map = kmalloc(TPACPI_HOTKEY_MAP_SIZE,
3331 GFP_KERNEL);
3332 if (!hotkey_keycode_map) {
3333 printk(TPACPI_ERR
3334 "failed to allocate memory for key map\n");
3335 res = -ENOMEM;
3336 goto err_exit;
3337 }
3338
3339 if (thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO) {
3340 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3341 "using Lenovo default hot key map\n");
3342 memcpy(hotkey_keycode_map, &lenovo_keycode_map,
3343 TPACPI_HOTKEY_MAP_SIZE);
3344 } else {
3345 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3346 "using IBM default hot key map\n");
3347 memcpy(hotkey_keycode_map, &ibm_keycode_map,
3348 TPACPI_HOTKEY_MAP_SIZE);
3349 }
3350
3351 set_bit(EV_KEY, tpacpi_inputdev->evbit);
3352 set_bit(EV_MSC, tpacpi_inputdev->evbit);
3353 set_bit(MSC_SCAN, tpacpi_inputdev->mscbit);
3354 tpacpi_inputdev->keycodesize = TPACPI_HOTKEY_MAP_TYPESIZE;
3355 tpacpi_inputdev->keycodemax = TPACPI_HOTKEY_MAP_LEN;
3356 tpacpi_inputdev->keycode = hotkey_keycode_map;
3357 for (i = 0; i < TPACPI_HOTKEY_MAP_LEN; i++) {
3358 if (hotkey_keycode_map[i] != KEY_RESERVED) {
3359 set_bit(hotkey_keycode_map[i],
3360 tpacpi_inputdev->keybit);
3361 } else {
3362 if (i < sizeof(hotkey_reserved_mask)*8)
3363 hotkey_reserved_mask |= 1 << i;
3364 }
3365 }
3366
3367 if (tp_features.hotkey_wlsw) {
3368 set_bit(EV_SW, tpacpi_inputdev->evbit);
3369 set_bit(SW_RFKILL_ALL, tpacpi_inputdev->swbit);
3370 }
3371 if (tp_features.hotkey_tablet) {
3372 set_bit(EV_SW, tpacpi_inputdev->evbit);
3373 set_bit(SW_TABLET_MODE, tpacpi_inputdev->swbit);
3374 }
3375
3376 /* Do not issue duplicate brightness change events to
3377 * userspace */
3378 if (!tp_features.bright_acpimode)
3379 /* update bright_acpimode... */
3380 tpacpi_check_std_acpi_brightness_support();
3381
3382 if (tp_features.bright_acpimode && acpi_video_backlight_support()) {
3383 printk(TPACPI_INFO
3384 "This ThinkPad has standard ACPI backlight "
3385 "brightness control, supported by the ACPI "
3386 "video driver\n");
3387 printk(TPACPI_NOTICE
3388 "Disabling thinkpad-acpi brightness events "
3389 "by default...\n");
3390
3391 /* Disable brightness up/down on Lenovo thinkpads when
3392 * ACPI is handling them, otherwise it is plain impossible
3393 * for userspace to do something even remotely sane */
3394 hotkey_reserved_mask |=
3395 (1 << TP_ACPI_HOTKEYSCAN_FNHOME)
3396 | (1 << TP_ACPI_HOTKEYSCAN_FNEND);
3397 hotkey_unmap(TP_ACPI_HOTKEYSCAN_FNHOME);
3398 hotkey_unmap(TP_ACPI_HOTKEYSCAN_FNEND);
3399 }
3400
3401 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
3402 hotkey_source_mask = TPACPI_HKEY_NVRAM_GOOD_MASK
3403 & ~hotkey_all_mask
3404 & ~hotkey_reserved_mask;
3405
3406 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3407 "hotkey source mask 0x%08x, polling freq %u\n",
3408 hotkey_source_mask, hotkey_poll_freq);
3409 #endif
3410
3411 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3412 "enabling firmware HKEY event interface...\n");
3413 res = hotkey_status_set(true);
3414 if (res) {
3415 hotkey_exit();
3416 return res;
3417 }
3418 res = hotkey_mask_set(((hotkey_all_mask & ~hotkey_reserved_mask)
3419 | hotkey_driver_mask)
3420 & ~hotkey_source_mask);
3421 if (res < 0 && res != -ENXIO) {
3422 hotkey_exit();
3423 return res;
3424 }
3425 hotkey_user_mask = (hotkey_acpi_mask | hotkey_source_mask)
3426 & ~hotkey_reserved_mask;
3427 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3428 "initial masks: user=0x%08x, fw=0x%08x, poll=0x%08x\n",
3429 hotkey_user_mask, hotkey_acpi_mask, hotkey_source_mask);
3430
3431 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3432 "legacy ibm/hotkey event reporting over procfs %s\n",
3433 (hotkey_report_mode < 2) ?
3434 "enabled" : "disabled");
3435
3436 tpacpi_inputdev->open = &hotkey_inputdev_open;
3437 tpacpi_inputdev->close = &hotkey_inputdev_close;
3438
3439 hotkey_poll_setup_safe(true);
3440 tpacpi_send_radiosw_update();
3441 tpacpi_input_send_tabletsw();
3442
3443 return 0;
3444
3445 err_exit:
3446 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
3447 hotkey_dev_attributes = NULL;
3448
3449 return (res < 0)? res : 1;
3450 }
3451
3452 static bool hotkey_notify_hotkey(const u32 hkey,
3453 bool *send_acpi_ev,
3454 bool *ignore_acpi_ev)
3455 {
3456 /* 0x1000-0x1FFF: key presses */
3457 unsigned int scancode = hkey & 0xfff;
3458 *send_acpi_ev = true;
3459 *ignore_acpi_ev = false;
3460
3461 if (scancode > 0 && scancode < 0x21) {
3462 scancode--;
3463 if (!(hotkey_source_mask & (1 << scancode))) {
3464 tpacpi_input_send_key_masked(scancode);
3465 *send_acpi_ev = false;
3466 } else {
3467 *ignore_acpi_ev = true;
3468 }
3469 return true;
3470 }
3471 return false;
3472 }
3473
3474 static bool hotkey_notify_wakeup(const u32 hkey,
3475 bool *send_acpi_ev,
3476 bool *ignore_acpi_ev)
3477 {
3478 /* 0x2000-0x2FFF: Wakeup reason */
3479 *send_acpi_ev = true;
3480 *ignore_acpi_ev = false;
3481
3482 switch (hkey) {
3483 case TP_HKEY_EV_WKUP_S3_UNDOCK: /* suspend, undock */
3484 case TP_HKEY_EV_WKUP_S4_UNDOCK: /* hibernation, undock */
3485 hotkey_wakeup_reason = TP_ACPI_WAKEUP_UNDOCK;
3486 *ignore_acpi_ev = true;
3487 break;
3488
3489 case TP_HKEY_EV_WKUP_S3_BAYEJ: /* suspend, bay eject */
3490 case TP_HKEY_EV_WKUP_S4_BAYEJ: /* hibernation, bay eject */
3491 hotkey_wakeup_reason = TP_ACPI_WAKEUP_BAYEJ;
3492 *ignore_acpi_ev = true;
3493 break;
3494
3495 case TP_HKEY_EV_WKUP_S3_BATLOW: /* Battery on critical low level/S3 */
3496 case TP_HKEY_EV_WKUP_S4_BATLOW: /* Battery on critical low level/S4 */
3497 printk(TPACPI_ALERT
3498 "EMERGENCY WAKEUP: battery almost empty\n");
3499 /* how to auto-heal: */
3500 /* 2313: woke up from S3, go to S4/S5 */
3501 /* 2413: woke up from S4, go to S5 */
3502 break;
3503
3504 default:
3505 return false;
3506 }
3507
3508 if (hotkey_wakeup_reason != TP_ACPI_WAKEUP_NONE) {
3509 printk(TPACPI_INFO
3510 "woke up due to a hot-unplug "
3511 "request...\n");
3512 hotkey_wakeup_reason_notify_change();
3513 }
3514 return true;
3515 }
3516
3517 static bool hotkey_notify_usrevent(const u32 hkey,
3518 bool *send_acpi_ev,
3519 bool *ignore_acpi_ev)
3520 {
3521 /* 0x5000-0x5FFF: human interface helpers */
3522 *send_acpi_ev = true;
3523 *ignore_acpi_ev = false;
3524
3525 switch (hkey) {
3526 case TP_HKEY_EV_PEN_INSERTED: /* X61t: tablet pen inserted into bay */
3527 case TP_HKEY_EV_PEN_REMOVED: /* X61t: tablet pen removed from bay */
3528 return true;
3529
3530 case TP_HKEY_EV_TABLET_TABLET: /* X41t-X61t: tablet mode */
3531 case TP_HKEY_EV_TABLET_NOTEBOOK: /* X41t-X61t: normal mode */
3532 tpacpi_input_send_tabletsw();
3533 hotkey_tablet_mode_notify_change();
3534 *send_acpi_ev = false;
3535 return true;
3536
3537 case TP_HKEY_EV_LID_CLOSE: /* Lid closed */
3538 case TP_HKEY_EV_LID_OPEN: /* Lid opened */
3539 case TP_HKEY_EV_BRGHT_CHANGED: /* brightness changed */
3540 /* do not propagate these events */
3541 *ignore_acpi_ev = true;
3542 return true;
3543
3544 default:
3545 return false;
3546 }
3547 }
3548
3549 static bool hotkey_notify_thermal(const u32 hkey,
3550 bool *send_acpi_ev,
3551 bool *ignore_acpi_ev)
3552 {
3553 /* 0x6000-0x6FFF: thermal alarms */
3554 *send_acpi_ev = true;
3555 *ignore_acpi_ev = false;
3556
3557 switch (hkey) {
3558 case TP_HKEY_EV_ALARM_BAT_HOT:
3559 printk(TPACPI_CRIT
3560 "THERMAL ALARM: battery is too hot!\n");
3561 /* recommended action: warn user through gui */
3562 return true;
3563 case TP_HKEY_EV_ALARM_BAT_XHOT:
3564 printk(TPACPI_ALERT
3565 "THERMAL EMERGENCY: battery is extremely hot!\n");
3566 /* recommended action: immediate sleep/hibernate */
3567 return true;
3568 case TP_HKEY_EV_ALARM_SENSOR_HOT:
3569 printk(TPACPI_CRIT
3570 "THERMAL ALARM: "
3571 "a sensor reports something is too hot!\n");
3572 /* recommended action: warn user through gui, that */
3573 /* some internal component is too hot */
3574 return true;
3575 case TP_HKEY_EV_ALARM_SENSOR_XHOT:
3576 printk(TPACPI_ALERT
3577 "THERMAL EMERGENCY: "
3578 "a sensor reports something is extremely hot!\n");
3579 /* recommended action: immediate sleep/hibernate */
3580 return true;
3581 case TP_HKEY_EV_THM_TABLE_CHANGED:
3582 printk(TPACPI_INFO
3583 "EC reports that Thermal Table has changed\n");
3584 /* recommended action: do nothing, we don't have
3585 * Lenovo ATM information */
3586 return true;
3587 default:
3588 printk(TPACPI_ALERT
3589 "THERMAL ALERT: unknown thermal alarm received\n");
3590 return false;
3591 }
3592 }
3593
3594 static void hotkey_notify(struct ibm_struct *ibm, u32 event)
3595 {
3596 u32 hkey;
3597 bool send_acpi_ev;
3598 bool ignore_acpi_ev;
3599 bool known_ev;
3600
3601 if (event != 0x80) {
3602 printk(TPACPI_ERR
3603 "unknown HKEY notification event %d\n", event);
3604 /* forward it to userspace, maybe it knows how to handle it */
3605 acpi_bus_generate_netlink_event(
3606 ibm->acpi->device->pnp.device_class,
3607 dev_name(&ibm->acpi->device->dev),
3608 event, 0);
3609 return;
3610 }
3611
3612 while (1) {
3613 if (!acpi_evalf(hkey_handle, &hkey, "MHKP", "d")) {
3614 printk(TPACPI_ERR "failed to retrieve HKEY event\n");
3615 return;
3616 }
3617
3618 if (hkey == 0) {
3619 /* queue empty */
3620 return;
3621 }
3622
3623 send_acpi_ev = true;
3624 ignore_acpi_ev = false;
3625
3626 switch (hkey >> 12) {
3627 case 1:
3628 /* 0x1000-0x1FFF: key presses */
3629 known_ev = hotkey_notify_hotkey(hkey, &send_acpi_ev,
3630 &ignore_acpi_ev);
3631 break;
3632 case 2:
3633 /* 0x2000-0x2FFF: Wakeup reason */
3634 known_ev = hotkey_notify_wakeup(hkey, &send_acpi_ev,
3635 &ignore_acpi_ev);
3636 break;
3637 case 3:
3638 /* 0x3000-0x3FFF: bay-related wakeups */
3639 if (hkey == TP_HKEY_EV_BAYEJ_ACK) {
3640 hotkey_autosleep_ack = 1;
3641 printk(TPACPI_INFO
3642 "bay ejected\n");
3643 hotkey_wakeup_hotunplug_complete_notify_change();
3644 known_ev = true;
3645 } else {
3646 known_ev = false;
3647 }
3648 break;
3649 case 4:
3650 /* 0x4000-0x4FFF: dock-related wakeups */
3651 if (hkey == TP_HKEY_EV_UNDOCK_ACK) {
3652 hotkey_autosleep_ack = 1;
3653 printk(TPACPI_INFO
3654 "undocked\n");
3655 hotkey_wakeup_hotunplug_complete_notify_change();
3656 known_ev = true;
3657 } else {
3658 known_ev = false;
3659 }
3660 break;
3661 case 5:
3662 /* 0x5000-0x5FFF: human interface helpers */
3663 known_ev = hotkey_notify_usrevent(hkey, &send_acpi_ev,
3664 &ignore_acpi_ev);
3665 break;
3666 case 6:
3667 /* 0x6000-0x6FFF: thermal alarms */
3668 known_ev = hotkey_notify_thermal(hkey, &send_acpi_ev,
3669 &ignore_acpi_ev);
3670 break;
3671 case 7:
3672 /* 0x7000-0x7FFF: misc */
3673 if (tp_features.hotkey_wlsw &&
3674 hkey == TP_HKEY_EV_RFKILL_CHANGED) {
3675 tpacpi_send_radiosw_update();
3676 send_acpi_ev = 0;
3677 known_ev = true;
3678 break;
3679 }
3680 /* fallthrough to default */
3681 default:
3682 known_ev = false;
3683 }
3684 if (!known_ev) {
3685 printk(TPACPI_NOTICE
3686 "unhandled HKEY event 0x%04x\n", hkey);
3687 printk(TPACPI_NOTICE
3688 "please report the conditions when this "
3689 "event happened to %s\n", TPACPI_MAIL);
3690 }
3691
3692 /* Legacy events */
3693 if (!ignore_acpi_ev &&
3694 (send_acpi_ev || hotkey_report_mode < 2)) {
3695 acpi_bus_generate_proc_event(ibm->acpi->device,
3696 event, hkey);
3697 }
3698
3699 /* netlink events */
3700 if (!ignore_acpi_ev && send_acpi_ev) {
3701 acpi_bus_generate_netlink_event(
3702 ibm->acpi->device->pnp.device_class,
3703 dev_name(&ibm->acpi->device->dev),
3704 event, hkey);
3705 }
3706 }
3707 }
3708
3709 static void hotkey_suspend(pm_message_t state)
3710 {
3711 /* Do these on suspend, we get the events on early resume! */
3712 hotkey_wakeup_reason = TP_ACPI_WAKEUP_NONE;
3713 hotkey_autosleep_ack = 0;
3714 }
3715
3716 static void hotkey_resume(void)
3717 {
3718 tpacpi_disable_brightness_delay();
3719
3720 if (hotkey_status_set(true) < 0 ||
3721 hotkey_mask_set(hotkey_acpi_mask) < 0)
3722 printk(TPACPI_ERR
3723 "error while attempting to reset the event "
3724 "firmware interface\n");
3725
3726 tpacpi_send_radiosw_update();
3727 hotkey_tablet_mode_notify_change();
3728 hotkey_wakeup_reason_notify_change();
3729 hotkey_wakeup_hotunplug_complete_notify_change();
3730 hotkey_poll_setup_safe(false);
3731 }
3732
3733 /* procfs -------------------------------------------------------------- */
3734 static int hotkey_read(char *p)
3735 {
3736 int res, status;
3737 int len = 0;
3738
3739 if (!tp_features.hotkey) {
3740 len += sprintf(p + len, "status:\t\tnot supported\n");
3741 return len;
3742 }
3743
3744 if (mutex_lock_killable(&hotkey_mutex))
3745 return -ERESTARTSYS;
3746 res = hotkey_status_get(&status);
3747 if (!res)
3748 res = hotkey_mask_get();
3749 mutex_unlock(&hotkey_mutex);
3750 if (res)
3751 return res;
3752
3753 len += sprintf(p + len, "status:\t\t%s\n", enabled(status, 0));
3754 if (hotkey_all_mask) {
3755 len += sprintf(p + len, "mask:\t\t0x%08x\n", hotkey_user_mask);
3756 len += sprintf(p + len,
3757 "commands:\tenable, disable, reset, <mask>\n");
3758 } else {
3759 len += sprintf(p + len, "mask:\t\tnot supported\n");
3760 len += sprintf(p + len, "commands:\tenable, disable, reset\n");
3761 }
3762
3763 return len;
3764 }
3765
3766 static void hotkey_enabledisable_warn(bool enable)
3767 {
3768 tpacpi_log_usertask("procfs hotkey enable/disable");
3769 if (!WARN((tpacpi_lifecycle == TPACPI_LIFE_RUNNING || !enable),
3770 TPACPI_WARN
3771 "hotkey enable/disable functionality has been "
3772 "removed from the driver. Hotkeys are always "
3773 "enabled\n"))
3774 printk(TPACPI_ERR
3775 "Please remove the hotkey=enable module "
3776 "parameter, it is deprecated. Hotkeys are always "
3777 "enabled\n");
3778 }
3779
3780 static int hotkey_write(char *buf)
3781 {
3782 int res;
3783 u32 mask;
3784 char *cmd;
3785
3786 if (!tp_features.hotkey)
3787 return -ENODEV;
3788
3789 if (mutex_lock_killable(&hotkey_mutex))
3790 return -ERESTARTSYS;
3791
3792 mask = hotkey_user_mask;
3793
3794 res = 0;
3795 while ((cmd = next_cmd(&buf))) {
3796 if (strlencmp(cmd, "enable") == 0) {
3797 hotkey_enabledisable_warn(1);
3798 } else if (strlencmp(cmd, "disable") == 0) {
3799 hotkey_enabledisable_warn(0);
3800 res = -EPERM;
3801 } else if (strlencmp(cmd, "reset") == 0) {
3802 mask = (hotkey_all_mask | hotkey_source_mask)
3803 & ~hotkey_reserved_mask;
3804 } else if (sscanf(cmd, "0x%x", &mask) == 1) {
3805 /* mask set */
3806 } else if (sscanf(cmd, "%x", &mask) == 1) {
3807 /* mask set */
3808 } else {
3809 res = -EINVAL;
3810 goto errexit;
3811 }
3812 }
3813
3814 if (!res) {
3815 tpacpi_disclose_usertask("procfs hotkey",
3816 "set mask to 0x%08x\n", mask);
3817 res = hotkey_user_mask_set(mask);
3818 }
3819
3820 errexit:
3821 mutex_unlock(&hotkey_mutex);
3822 return res;
3823 }
3824
3825 static const struct acpi_device_id ibm_htk_device_ids[] = {
3826 {TPACPI_ACPI_HKEY_HID, 0},
3827 {"", 0},
3828 };
3829
3830 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver = {
3831 .hid = ibm_htk_device_ids,
3832 .notify = hotkey_notify,
3833 .handle = &hkey_handle,
3834 .type = ACPI_DEVICE_NOTIFY,
3835 };
3836
3837 static struct ibm_struct hotkey_driver_data = {
3838 .name = "hotkey",
3839 .read = hotkey_read,
3840 .write = hotkey_write,
3841 .exit = hotkey_exit,
3842 .resume = hotkey_resume,
3843 .suspend = hotkey_suspend,
3844 .acpi = &ibm_hotkey_acpidriver,
3845 };
3846
3847 /*************************************************************************
3848 * Bluetooth subdriver
3849 */
3850
3851 enum {
3852 /* ACPI GBDC/SBDC bits */
3853 TP_ACPI_BLUETOOTH_HWPRESENT = 0x01, /* Bluetooth hw available */
3854 TP_ACPI_BLUETOOTH_RADIOSSW = 0x02, /* Bluetooth radio enabled */
3855 TP_ACPI_BLUETOOTH_RESUMECTRL = 0x04, /* Bluetooth state at resume:
3856 off / last state */
3857 };
3858
3859 enum {
3860 /* ACPI \BLTH commands */
3861 TP_ACPI_BLTH_GET_ULTRAPORT_ID = 0x00, /* Get Ultraport BT ID */
3862 TP_ACPI_BLTH_GET_PWR_ON_RESUME = 0x01, /* Get power-on-resume state */
3863 TP_ACPI_BLTH_PWR_ON_ON_RESUME = 0x02, /* Resume powered on */
3864 TP_ACPI_BLTH_PWR_OFF_ON_RESUME = 0x03, /* Resume powered off */
3865 TP_ACPI_BLTH_SAVE_STATE = 0x05, /* Save state for S4/S5 */
3866 };
3867
3868 #define TPACPI_RFK_BLUETOOTH_SW_NAME "tpacpi_bluetooth_sw"
3869
3870 static int bluetooth_get_status(void)
3871 {
3872 int status;
3873
3874 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3875 if (dbg_bluetoothemul)
3876 return (tpacpi_bluetooth_emulstate) ?
3877 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
3878 #endif
3879
3880 if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
3881 return -EIO;
3882
3883 return ((status & TP_ACPI_BLUETOOTH_RADIOSSW) != 0) ?
3884 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
3885 }
3886
3887 static int bluetooth_set_status(enum tpacpi_rfkill_state state)
3888 {
3889 int status;
3890
3891 vdbg_printk(TPACPI_DBG_RFKILL,
3892 "will attempt to %s bluetooth\n",
3893 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable");
3894
3895 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3896 if (dbg_bluetoothemul) {
3897 tpacpi_bluetooth_emulstate = (state == TPACPI_RFK_RADIO_ON);
3898 return 0;
3899 }
3900 #endif
3901
3902 /* We make sure to keep TP_ACPI_BLUETOOTH_RESUMECTRL off */
3903 status = TP_ACPI_BLUETOOTH_RESUMECTRL;
3904 if (state == TPACPI_RFK_RADIO_ON)
3905 status |= TP_ACPI_BLUETOOTH_RADIOSSW;
3906
3907 if (!acpi_evalf(hkey_handle, NULL, "SBDC", "vd", status))
3908 return -EIO;
3909
3910 return 0;
3911 }
3912
3913 /* sysfs bluetooth enable ---------------------------------------------- */
3914 static ssize_t bluetooth_enable_show(struct device *dev,
3915 struct device_attribute *attr,
3916 char *buf)
3917 {
3918 return tpacpi_rfk_sysfs_enable_show(TPACPI_RFK_BLUETOOTH_SW_ID,
3919 attr, buf);
3920 }
3921
3922 static ssize_t bluetooth_enable_store(struct device *dev,
3923 struct device_attribute *attr,
3924 const char *buf, size_t count)
3925 {
3926 return tpacpi_rfk_sysfs_enable_store(TPACPI_RFK_BLUETOOTH_SW_ID,
3927 attr, buf, count);
3928 }
3929
3930 static struct device_attribute dev_attr_bluetooth_enable =
3931 __ATTR(bluetooth_enable, S_IWUSR | S_IRUGO,
3932 bluetooth_enable_show, bluetooth_enable_store);
3933
3934 /* --------------------------------------------------------------------- */
3935
3936 static struct attribute *bluetooth_attributes[] = {
3937 &dev_attr_bluetooth_enable.attr,
3938 NULL
3939 };
3940
3941 static const struct attribute_group bluetooth_attr_group = {
3942 .attrs = bluetooth_attributes,
3943 };
3944
3945 static const struct tpacpi_rfk_ops bluetooth_tprfk_ops = {
3946 .get_status = bluetooth_get_status,
3947 .set_status = bluetooth_set_status,
3948 };
3949
3950 static void bluetooth_shutdown(void)
3951 {
3952 /* Order firmware to save current state to NVRAM */
3953 if (!acpi_evalf(NULL, NULL, "\\BLTH", "vd",
3954 TP_ACPI_BLTH_SAVE_STATE))
3955 printk(TPACPI_NOTICE
3956 "failed to save bluetooth state to NVRAM\n");
3957 else
3958 vdbg_printk(TPACPI_DBG_RFKILL,
3959 "bluestooth state saved to NVRAM\n");
3960 }
3961
3962 static void bluetooth_exit(void)
3963 {
3964 sysfs_remove_group(&tpacpi_pdev->dev.kobj,
3965 &bluetooth_attr_group);
3966
3967 tpacpi_destroy_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID);
3968
3969 bluetooth_shutdown();
3970 }
3971
3972 static int __init bluetooth_init(struct ibm_init_struct *iibm)
3973 {
3974 int res;
3975 int status = 0;
3976
3977 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
3978 "initializing bluetooth subdriver\n");
3979
3980 TPACPI_ACPIHANDLE_INIT(hkey);
3981
3982 /* bluetooth not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
3983 G4x, R30, R31, R40e, R50e, T20-22, X20-21 */
3984 tp_features.bluetooth = hkey_handle &&
3985 acpi_evalf(hkey_handle, &status, "GBDC", "qd");
3986
3987 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
3988 "bluetooth is %s, status 0x%02x\n",
3989 str_supported(tp_features.bluetooth),
3990 status);
3991
3992 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3993 if (dbg_bluetoothemul) {
3994 tp_features.bluetooth = 1;
3995 printk(TPACPI_INFO
3996 "bluetooth switch emulation enabled\n");
3997 } else
3998 #endif
3999 if (tp_features.bluetooth &&
4000 !(status & TP_ACPI_BLUETOOTH_HWPRESENT)) {
4001 /* no bluetooth hardware present in system */
4002 tp_features.bluetooth = 0;
4003 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4004 "bluetooth hardware not installed\n");
4005 }
4006
4007 if (!tp_features.bluetooth)
4008 return 1;
4009
4010 res = tpacpi_new_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID,
4011 &bluetooth_tprfk_ops,
4012 RFKILL_TYPE_BLUETOOTH,
4013 TPACPI_RFK_BLUETOOTH_SW_NAME,
4014 true);
4015 if (res)
4016 return res;
4017
4018 res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
4019 &bluetooth_attr_group);
4020 if (res) {
4021 tpacpi_destroy_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID);
4022 return res;
4023 }
4024
4025 return 0;
4026 }
4027
4028 /* procfs -------------------------------------------------------------- */
4029 static int bluetooth_read(char *p)
4030 {
4031 return tpacpi_rfk_procfs_read(TPACPI_RFK_BLUETOOTH_SW_ID, p);
4032 }
4033
4034 static int bluetooth_write(char *buf)
4035 {
4036 return tpacpi_rfk_procfs_write(TPACPI_RFK_BLUETOOTH_SW_ID, buf);
4037 }
4038
4039 static struct ibm_struct bluetooth_driver_data = {
4040 .name = "bluetooth",
4041 .read = bluetooth_read,
4042 .write = bluetooth_write,
4043 .exit = bluetooth_exit,
4044 .shutdown = bluetooth_shutdown,
4045 };
4046
4047 /*************************************************************************
4048 * Wan subdriver
4049 */
4050
4051 enum {
4052 /* ACPI GWAN/SWAN bits */
4053 TP_ACPI_WANCARD_HWPRESENT = 0x01, /* Wan hw available */
4054 TP_ACPI_WANCARD_RADIOSSW = 0x02, /* Wan radio enabled */
4055 TP_ACPI_WANCARD_RESUMECTRL = 0x04, /* Wan state at resume:
4056 off / last state */
4057 };
4058
4059 #define TPACPI_RFK_WWAN_SW_NAME "tpacpi_wwan_sw"
4060
4061 static int wan_get_status(void)
4062 {
4063 int status;
4064
4065 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4066 if (dbg_wwanemul)
4067 return (tpacpi_wwan_emulstate) ?
4068 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4069 #endif
4070
4071 if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
4072 return -EIO;
4073
4074 return ((status & TP_ACPI_WANCARD_RADIOSSW) != 0) ?
4075 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4076 }
4077
4078 static int wan_set_status(enum tpacpi_rfkill_state state)
4079 {
4080 int status;
4081
4082 vdbg_printk(TPACPI_DBG_RFKILL,
4083 "will attempt to %s wwan\n",
4084 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable");
4085
4086 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4087 if (dbg_wwanemul) {
4088 tpacpi_wwan_emulstate = (state == TPACPI_RFK_RADIO_ON);
4089 return 0;
4090 }
4091 #endif
4092
4093 /* We make sure to set TP_ACPI_WANCARD_RESUMECTRL */
4094 status = TP_ACPI_WANCARD_RESUMECTRL;
4095 if (state == TPACPI_RFK_RADIO_ON)
4096 status |= TP_ACPI_WANCARD_RADIOSSW;
4097
4098 if (!acpi_evalf(hkey_handle, NULL, "SWAN", "vd", status))
4099 return -EIO;
4100
4101 return 0;
4102 }
4103
4104 /* sysfs wan enable ---------------------------------------------------- */
4105 static ssize_t wan_enable_show(struct device *dev,
4106 struct device_attribute *attr,
4107 char *buf)
4108 {
4109 return tpacpi_rfk_sysfs_enable_show(TPACPI_RFK_WWAN_SW_ID,
4110 attr, buf);
4111 }
4112
4113 static ssize_t wan_enable_store(struct device *dev,
4114 struct device_attribute *attr,
4115 const char *buf, size_t count)
4116 {
4117 return tpacpi_rfk_sysfs_enable_store(TPACPI_RFK_WWAN_SW_ID,
4118 attr, buf, count);
4119 }
4120
4121 static struct device_attribute dev_attr_wan_enable =
4122 __ATTR(wwan_enable, S_IWUSR | S_IRUGO,
4123 wan_enable_show, wan_enable_store);
4124
4125 /* --------------------------------------------------------------------- */
4126
4127 static struct attribute *wan_attributes[] = {
4128 &dev_attr_wan_enable.attr,
4129 NULL
4130 };
4131
4132 static const struct attribute_group wan_attr_group = {
4133 .attrs = wan_attributes,
4134 };
4135
4136 static const struct tpacpi_rfk_ops wan_tprfk_ops = {
4137 .get_status = wan_get_status,
4138 .set_status = wan_set_status,
4139 };
4140
4141 static void wan_shutdown(void)
4142 {
4143 /* Order firmware to save current state to NVRAM */
4144 if (!acpi_evalf(NULL, NULL, "\\WGSV", "vd",
4145 TP_ACPI_WGSV_SAVE_STATE))
4146 printk(TPACPI_NOTICE
4147 "failed to save WWAN state to NVRAM\n");
4148 else
4149 vdbg_printk(TPACPI_DBG_RFKILL,
4150 "WWAN state saved to NVRAM\n");
4151 }
4152
4153 static void wan_exit(void)
4154 {
4155 sysfs_remove_group(&tpacpi_pdev->dev.kobj,
4156 &wan_attr_group);
4157
4158 tpacpi_destroy_rfkill(TPACPI_RFK_WWAN_SW_ID);
4159
4160 wan_shutdown();
4161 }
4162
4163 static int __init wan_init(struct ibm_init_struct *iibm)
4164 {
4165 int res;
4166 int status = 0;
4167
4168 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4169 "initializing wan subdriver\n");
4170
4171 TPACPI_ACPIHANDLE_INIT(hkey);
4172
4173 tp_features.wan = hkey_handle &&
4174 acpi_evalf(hkey_handle, &status, "GWAN", "qd");
4175
4176 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4177 "wan is %s, status 0x%02x\n",
4178 str_supported(tp_features.wan),
4179 status);
4180
4181 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4182 if (dbg_wwanemul) {
4183 tp_features.wan = 1;
4184 printk(TPACPI_INFO
4185 "wwan switch emulation enabled\n");
4186 } else
4187 #endif
4188 if (tp_features.wan &&
4189 !(status & TP_ACPI_WANCARD_HWPRESENT)) {
4190 /* no wan hardware present in system */
4191 tp_features.wan = 0;
4192 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4193 "wan hardware not installed\n");
4194 }
4195
4196 if (!tp_features.wan)
4197 return 1;
4198
4199 res = tpacpi_new_rfkill(TPACPI_RFK_WWAN_SW_ID,
4200 &wan_tprfk_ops,
4201 RFKILL_TYPE_WWAN,
4202 TPACPI_RFK_WWAN_SW_NAME,
4203 true);
4204 if (res)
4205 return res;
4206
4207 res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
4208 &wan_attr_group);
4209
4210 if (res) {
4211 tpacpi_destroy_rfkill(TPACPI_RFK_WWAN_SW_ID);
4212 return res;
4213 }
4214
4215 return 0;
4216 }
4217
4218 /* procfs -------------------------------------------------------------- */
4219 static int wan_read(char *p)
4220 {
4221 return tpacpi_rfk_procfs_read(TPACPI_RFK_WWAN_SW_ID, p);
4222 }
4223
4224 static int wan_write(char *buf)
4225 {
4226 return tpacpi_rfk_procfs_write(TPACPI_RFK_WWAN_SW_ID, buf);
4227 }
4228
4229 static struct ibm_struct wan_driver_data = {
4230 .name = "wan",
4231 .read = wan_read,
4232 .write = wan_write,
4233 .exit = wan_exit,
4234 .shutdown = wan_shutdown,
4235 };
4236
4237 /*************************************************************************
4238 * UWB subdriver
4239 */
4240
4241 enum {
4242 /* ACPI GUWB/SUWB bits */
4243 TP_ACPI_UWB_HWPRESENT = 0x01, /* UWB hw available */
4244 TP_ACPI_UWB_RADIOSSW = 0x02, /* UWB radio enabled */
4245 };
4246
4247 #define TPACPI_RFK_UWB_SW_NAME "tpacpi_uwb_sw"
4248
4249 static int uwb_get_status(void)
4250 {
4251 int status;
4252
4253 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4254 if (dbg_uwbemul)
4255 return (tpacpi_uwb_emulstate) ?
4256 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4257 #endif
4258
4259 if (!acpi_evalf(hkey_handle, &status, "GUWB", "d"))
4260 return -EIO;
4261
4262 return ((status & TP_ACPI_UWB_RADIOSSW) != 0) ?
4263 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4264 }
4265
4266 static int uwb_set_status(enum tpacpi_rfkill_state state)
4267 {
4268 int status;
4269
4270 vdbg_printk(TPACPI_DBG_RFKILL,
4271 "will attempt to %s UWB\n",
4272 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable");
4273
4274 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4275 if (dbg_uwbemul) {
4276 tpacpi_uwb_emulstate = (state == TPACPI_RFK_RADIO_ON);
4277 return 0;
4278 }
4279 #endif
4280
4281 if (state == TPACPI_RFK_RADIO_ON)
4282 status = TP_ACPI_UWB_RADIOSSW;
4283 else
4284 status = 0;
4285
4286 if (!acpi_evalf(hkey_handle, NULL, "SUWB", "vd", status))
4287 return -EIO;
4288
4289 return 0;
4290 }
4291
4292 /* --------------------------------------------------------------------- */
4293
4294 static const struct tpacpi_rfk_ops uwb_tprfk_ops = {
4295 .get_status = uwb_get_status,
4296 .set_status = uwb_set_status,
4297 };
4298
4299 static void uwb_exit(void)
4300 {
4301 tpacpi_destroy_rfkill(TPACPI_RFK_UWB_SW_ID);
4302 }
4303
4304 static int __init uwb_init(struct ibm_init_struct *iibm)
4305 {
4306 int res;
4307 int status = 0;
4308
4309 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4310 "initializing uwb subdriver\n");
4311
4312 TPACPI_ACPIHANDLE_INIT(hkey);
4313
4314 tp_features.uwb = hkey_handle &&
4315 acpi_evalf(hkey_handle, &status, "GUWB", "qd");
4316
4317 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4318 "uwb is %s, status 0x%02x\n",
4319 str_supported(tp_features.uwb),
4320 status);
4321
4322 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4323 if (dbg_uwbemul) {
4324 tp_features.uwb = 1;
4325 printk(TPACPI_INFO
4326 "uwb switch emulation enabled\n");
4327 } else
4328 #endif
4329 if (tp_features.uwb &&
4330 !(status & TP_ACPI_UWB_HWPRESENT)) {
4331 /* no uwb hardware present in system */
4332 tp_features.uwb = 0;
4333 dbg_printk(TPACPI_DBG_INIT,
4334 "uwb hardware not installed\n");
4335 }
4336
4337 if (!tp_features.uwb)
4338 return 1;
4339
4340 res = tpacpi_new_rfkill(TPACPI_RFK_UWB_SW_ID,
4341 &uwb_tprfk_ops,
4342 RFKILL_TYPE_UWB,
4343 TPACPI_RFK_UWB_SW_NAME,
4344 false);
4345 return res;
4346 }
4347
4348 static struct ibm_struct uwb_driver_data = {
4349 .name = "uwb",
4350 .exit = uwb_exit,
4351 .flags.experimental = 1,
4352 };
4353
4354 /*************************************************************************
4355 * Video subdriver
4356 */
4357
4358 #ifdef CONFIG_THINKPAD_ACPI_VIDEO
4359
4360 enum video_access_mode {
4361 TPACPI_VIDEO_NONE = 0,
4362 TPACPI_VIDEO_570, /* 570 */
4363 TPACPI_VIDEO_770, /* 600e/x, 770e, 770x */
4364 TPACPI_VIDEO_NEW, /* all others */
4365 };
4366
4367 enum { /* video status flags, based on VIDEO_570 */
4368 TP_ACPI_VIDEO_S_LCD = 0x01, /* LCD output enabled */
4369 TP_ACPI_VIDEO_S_CRT = 0x02, /* CRT output enabled */
4370 TP_ACPI_VIDEO_S_DVI = 0x08, /* DVI output enabled */
4371 };
4372
4373 enum { /* TPACPI_VIDEO_570 constants */
4374 TP_ACPI_VIDEO_570_PHSCMD = 0x87, /* unknown magic constant :( */
4375 TP_ACPI_VIDEO_570_PHSMASK = 0x03, /* PHS bits that map to
4376 * video_status_flags */
4377 TP_ACPI_VIDEO_570_PHS2CMD = 0x8b, /* unknown magic constant :( */
4378 TP_ACPI_VIDEO_570_PHS2SET = 0x80, /* unknown magic constant :( */
4379 };
4380
4381 static enum video_access_mode video_supported;
4382 static int video_orig_autosw;
4383
4384 static int video_autosw_get(void);
4385 static int video_autosw_set(int enable);
4386
4387 TPACPI_HANDLE(vid2, root, "\\_SB.PCI0.AGPB.VID"); /* G41 */
4388
4389 static int __init video_init(struct ibm_init_struct *iibm)
4390 {
4391 int ivga;
4392
4393 vdbg_printk(TPACPI_DBG_INIT, "initializing video subdriver\n");
4394
4395 TPACPI_ACPIHANDLE_INIT(vid);
4396 TPACPI_ACPIHANDLE_INIT(vid2);
4397
4398 if (vid2_handle && acpi_evalf(NULL, &ivga, "\\IVGA", "d") && ivga)
4399 /* G41, assume IVGA doesn't change */
4400 vid_handle = vid2_handle;
4401
4402 if (!vid_handle)
4403 /* video switching not supported on R30, R31 */
4404 video_supported = TPACPI_VIDEO_NONE;
4405 else if (acpi_evalf(vid_handle, &video_orig_autosw, "SWIT", "qd"))
4406 /* 570 */
4407 video_supported = TPACPI_VIDEO_570;
4408 else if (acpi_evalf(vid_handle, &video_orig_autosw, "^VADL", "qd"))
4409 /* 600e/x, 770e, 770x */
4410 video_supported = TPACPI_VIDEO_770;
4411 else
4412 /* all others */
4413 video_supported = TPACPI_VIDEO_NEW;
4414
4415 vdbg_printk(TPACPI_DBG_INIT, "video is %s, mode %d\n",
4416 str_supported(video_supported != TPACPI_VIDEO_NONE),
4417 video_supported);
4418
4419 return (video_supported != TPACPI_VIDEO_NONE)? 0 : 1;
4420 }
4421
4422 static void video_exit(void)
4423 {
4424 dbg_printk(TPACPI_DBG_EXIT,
4425 "restoring original video autoswitch mode\n");
4426 if (video_autosw_set(video_orig_autosw))
4427 printk(TPACPI_ERR "error while trying to restore original "
4428 "video autoswitch mode\n");
4429 }
4430
4431 static int video_outputsw_get(void)
4432 {
4433 int status = 0;
4434 int i;
4435
4436 switch (video_supported) {
4437 case TPACPI_VIDEO_570:
4438 if (!acpi_evalf(NULL, &i, "\\_SB.PHS", "dd",
4439 TP_ACPI_VIDEO_570_PHSCMD))
4440 return -EIO;
4441 status = i & TP_ACPI_VIDEO_570_PHSMASK;
4442 break;
4443 case TPACPI_VIDEO_770:
4444 if (!acpi_evalf(NULL, &i, "\\VCDL", "d"))
4445 return -EIO;
4446 if (i)
4447 status |= TP_ACPI_VIDEO_S_LCD;
4448 if (!acpi_evalf(NULL, &i, "\\VCDC", "d"))
4449 return -EIO;
4450 if (i)
4451 status |= TP_ACPI_VIDEO_S_CRT;
4452 break;
4453 case TPACPI_VIDEO_NEW:
4454 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 1) ||
4455 !acpi_evalf(NULL, &i, "\\VCDC", "d"))
4456 return -EIO;
4457 if (i)
4458 status |= TP_ACPI_VIDEO_S_CRT;
4459
4460 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0) ||
4461 !acpi_evalf(NULL, &i, "\\VCDL", "d"))
4462 return -EIO;
4463 if (i)
4464 status |= TP_ACPI_VIDEO_S_LCD;
4465 if (!acpi_evalf(NULL, &i, "\\VCDD", "d"))
4466 return -EIO;
4467 if (i)
4468 status |= TP_ACPI_VIDEO_S_DVI;
4469 break;
4470 default:
4471 return -ENOSYS;
4472 }
4473
4474 return status;
4475 }
4476
4477 static int video_outputsw_set(int status)
4478 {
4479 int autosw;
4480 int res = 0;
4481
4482 switch (video_supported) {
4483 case TPACPI_VIDEO_570:
4484 res = acpi_evalf(NULL, NULL,
4485 "\\_SB.PHS2", "vdd",
4486 TP_ACPI_VIDEO_570_PHS2CMD,
4487 status | TP_ACPI_VIDEO_570_PHS2SET);
4488 break;
4489 case TPACPI_VIDEO_770:
4490 autosw = video_autosw_get();
4491 if (autosw < 0)
4492 return autosw;
4493
4494 res = video_autosw_set(1);
4495 if (res)
4496 return res;
4497 res = acpi_evalf(vid_handle, NULL,
4498 "ASWT", "vdd", status * 0x100, 0);
4499 if (!autosw && video_autosw_set(autosw)) {
4500 printk(TPACPI_ERR
4501 "video auto-switch left enabled due to error\n");
4502 return -EIO;
4503 }
4504 break;
4505 case TPACPI_VIDEO_NEW:
4506 res = acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0x80) &&
4507 acpi_evalf(NULL, NULL, "\\VSDS", "vdd", status, 1);
4508 break;
4509 default:
4510 return -ENOSYS;
4511 }
4512
4513 return (res)? 0 : -EIO;
4514 }
4515
4516 static int video_autosw_get(void)
4517 {
4518 int autosw = 0;
4519
4520 switch (video_supported) {
4521 case TPACPI_VIDEO_570:
4522 if (!acpi_evalf(vid_handle, &autosw, "SWIT", "d"))
4523 return -EIO;
4524 break;
4525 case TPACPI_VIDEO_770:
4526 case TPACPI_VIDEO_NEW:
4527 if (!acpi_evalf(vid_handle, &autosw, "^VDEE", "d"))
4528 return -EIO;
4529 break;
4530 default:
4531 return -ENOSYS;
4532 }
4533
4534 return autosw & 1;
4535 }
4536
4537 static int video_autosw_set(int enable)
4538 {
4539 if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", (enable)? 1 : 0))
4540 return -EIO;
4541 return 0;
4542 }
4543
4544 static int video_outputsw_cycle(void)
4545 {
4546 int autosw = video_autosw_get();
4547 int res;
4548
4549 if (autosw < 0)
4550 return autosw;
4551
4552 switch (video_supported) {
4553 case TPACPI_VIDEO_570:
4554 res = video_autosw_set(1);
4555 if (res)
4556 return res;
4557 res = acpi_evalf(ec_handle, NULL, "_Q16", "v");
4558 break;
4559 case TPACPI_VIDEO_770:
4560 case TPACPI_VIDEO_NEW:
4561 res = video_autosw_set(1);
4562 if (res)
4563 return res;
4564 res = acpi_evalf(vid_handle, NULL, "VSWT", "v");
4565 break;
4566 default:
4567 return -ENOSYS;
4568 }
4569 if (!autosw && video_autosw_set(autosw)) {
4570 printk(TPACPI_ERR
4571 "video auto-switch left enabled due to error\n");
4572 return -EIO;
4573 }
4574
4575 return (res)? 0 : -EIO;
4576 }
4577
4578 static int video_expand_toggle(void)
4579 {
4580 switch (video_supported) {
4581 case TPACPI_VIDEO_570:
4582 return acpi_evalf(ec_handle, NULL, "_Q17", "v")?
4583 0 : -EIO;
4584 case TPACPI_VIDEO_770:
4585 return acpi_evalf(vid_handle, NULL, "VEXP", "v")?
4586 0 : -EIO;
4587 case TPACPI_VIDEO_NEW:
4588 return acpi_evalf(NULL, NULL, "\\VEXP", "v")?
4589 0 : -EIO;
4590 default:
4591 return -ENOSYS;
4592 }
4593 /* not reached */
4594 }
4595
4596 static int video_read(char *p)
4597 {
4598 int status, autosw;
4599 int len = 0;
4600
4601 if (video_supported == TPACPI_VIDEO_NONE) {
4602 len += sprintf(p + len, "status:\t\tnot supported\n");
4603 return len;
4604 }
4605
4606 status = video_outputsw_get();
4607 if (status < 0)
4608 return status;
4609
4610 autosw = video_autosw_get();
4611 if (autosw < 0)
4612 return autosw;
4613
4614 len += sprintf(p + len, "status:\t\tsupported\n");
4615 len += sprintf(p + len, "lcd:\t\t%s\n", enabled(status, 0));
4616 len += sprintf(p + len, "crt:\t\t%s\n", enabled(status, 1));
4617 if (video_supported == TPACPI_VIDEO_NEW)
4618 len += sprintf(p + len, "dvi:\t\t%s\n", enabled(status, 3));
4619 len += sprintf(p + len, "auto:\t\t%s\n", enabled(autosw, 0));
4620 len += sprintf(p + len, "commands:\tlcd_enable, lcd_disable\n");
4621 len += sprintf(p + len, "commands:\tcrt_enable, crt_disable\n");
4622 if (video_supported == TPACPI_VIDEO_NEW)
4623 len += sprintf(p + len, "commands:\tdvi_enable, dvi_disable\n");
4624 len += sprintf(p + len, "commands:\tauto_enable, auto_disable\n");
4625 len += sprintf(p + len, "commands:\tvideo_switch, expand_toggle\n");
4626
4627 return len;
4628 }
4629
4630 static int video_write(char *buf)
4631 {
4632 char *cmd;
4633 int enable, disable, status;
4634 int res;
4635
4636 if (video_supported == TPACPI_VIDEO_NONE)
4637 return -ENODEV;
4638
4639 enable = 0;
4640 disable = 0;
4641
4642 while ((cmd = next_cmd(&buf))) {
4643 if (strlencmp(cmd, "lcd_enable") == 0) {
4644 enable |= TP_ACPI_VIDEO_S_LCD;
4645 } else if (strlencmp(cmd, "lcd_disable") == 0) {
4646 disable |= TP_ACPI_VIDEO_S_LCD;
4647 } else if (strlencmp(cmd, "crt_enable") == 0) {
4648 enable |= TP_ACPI_VIDEO_S_CRT;
4649 } else if (strlencmp(cmd, "crt_disable") == 0) {
4650 disable |= TP_ACPI_VIDEO_S_CRT;
4651 } else if (video_supported == TPACPI_VIDEO_NEW &&
4652 strlencmp(cmd, "dvi_enable") == 0) {
4653 enable |= TP_ACPI_VIDEO_S_DVI;
4654 } else if (video_supported == TPACPI_VIDEO_NEW &&
4655 strlencmp(cmd, "dvi_disable") == 0) {
4656 disable |= TP_ACPI_VIDEO_S_DVI;
4657 } else if (strlencmp(cmd, "auto_enable") == 0) {
4658 res = video_autosw_set(1);
4659 if (res)
4660 return res;
4661 } else if (strlencmp(cmd, "auto_disable") == 0) {
4662 res = video_autosw_set(0);
4663 if (res)
4664 return res;
4665 } else if (strlencmp(cmd, "video_switch") == 0) {
4666 res = video_outputsw_cycle();
4667 if (res)
4668 return res;
4669 } else if (strlencmp(cmd, "expand_toggle") == 0) {
4670 res = video_expand_toggle();
4671 if (res)
4672 return res;
4673 } else
4674 return -EINVAL;
4675 }
4676
4677 if (enable || disable) {
4678 status = video_outputsw_get();
4679 if (status < 0)
4680 return status;
4681 res = video_outputsw_set((status & ~disable) | enable);
4682 if (res)
4683 return res;
4684 }
4685
4686 return 0;
4687 }
4688
4689 static struct ibm_struct video_driver_data = {
4690 .name = "video",
4691 .read = video_read,
4692 .write = video_write,
4693 .exit = video_exit,
4694 };
4695
4696 #endif /* CONFIG_THINKPAD_ACPI_VIDEO */
4697
4698 /*************************************************************************
4699 * Light (thinklight) subdriver
4700 */
4701
4702 TPACPI_HANDLE(lght, root, "\\LGHT"); /* A21e, A2xm/p, T20-22, X20-21 */
4703 TPACPI_HANDLE(ledb, ec, "LEDB"); /* G4x */
4704
4705 static int light_get_status(void)
4706 {
4707 int status = 0;
4708
4709 if (tp_features.light_status) {
4710 if (!acpi_evalf(ec_handle, &status, "KBLT", "d"))
4711 return -EIO;
4712 return (!!status);
4713 }
4714
4715 return -ENXIO;
4716 }
4717
4718 static int light_set_status(int status)
4719 {
4720 int rc;
4721
4722 if (tp_features.light) {
4723 if (cmos_handle) {
4724 rc = acpi_evalf(cmos_handle, NULL, NULL, "vd",
4725 (status)?
4726 TP_CMOS_THINKLIGHT_ON :
4727 TP_CMOS_THINKLIGHT_OFF);
4728 } else {
4729 rc = acpi_evalf(lght_handle, NULL, NULL, "vd",
4730 (status)? 1 : 0);
4731 }
4732 return (rc)? 0 : -EIO;
4733 }
4734
4735 return -ENXIO;
4736 }
4737
4738 static void light_set_status_worker(struct work_struct *work)
4739 {
4740 struct tpacpi_led_classdev *data =
4741 container_of(work, struct tpacpi_led_classdev, work);
4742
4743 if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING))
4744 light_set_status((data->new_state != TPACPI_LED_OFF));
4745 }
4746
4747 static void light_sysfs_set(struct led_classdev *led_cdev,
4748 enum led_brightness brightness)
4749 {
4750 struct tpacpi_led_classdev *data =
4751 container_of(led_cdev,
4752 struct tpacpi_led_classdev,
4753 led_classdev);
4754 data->new_state = (brightness != LED_OFF) ?
4755 TPACPI_LED_ON : TPACPI_LED_OFF;
4756 queue_work(tpacpi_wq, &data->work);
4757 }
4758
4759 static enum led_brightness light_sysfs_get(struct led_classdev *led_cdev)
4760 {
4761 return (light_get_status() == 1)? LED_FULL : LED_OFF;
4762 }
4763
4764 static struct tpacpi_led_classdev tpacpi_led_thinklight = {
4765 .led_classdev = {
4766 .name = "tpacpi::thinklight",
4767 .brightness_set = &light_sysfs_set,
4768 .brightness_get = &light_sysfs_get,
4769 }
4770 };
4771
4772 static int __init light_init(struct ibm_init_struct *iibm)
4773 {
4774 int rc;
4775
4776 vdbg_printk(TPACPI_DBG_INIT, "initializing light subdriver\n");
4777
4778 TPACPI_ACPIHANDLE_INIT(ledb);
4779 TPACPI_ACPIHANDLE_INIT(lght);
4780 TPACPI_ACPIHANDLE_INIT(cmos);
4781 INIT_WORK(&tpacpi_led_thinklight.work, light_set_status_worker);
4782
4783 /* light not supported on 570, 600e/x, 770e, 770x, G4x, R30, R31 */
4784 tp_features.light = (cmos_handle || lght_handle) && !ledb_handle;
4785
4786 if (tp_features.light)
4787 /* light status not supported on
4788 570, 600e/x, 770e, 770x, G4x, R30, R31, R32, X20 */
4789 tp_features.light_status =
4790 acpi_evalf(ec_handle, NULL, "KBLT", "qv");
4791
4792 vdbg_printk(TPACPI_DBG_INIT, "light is %s, light status is %s\n",
4793 str_supported(tp_features.light),
4794 str_supported(tp_features.light_status));
4795
4796 if (!tp_features.light)
4797 return 1;
4798
4799 rc = led_classdev_register(&tpacpi_pdev->dev,
4800 &tpacpi_led_thinklight.led_classdev);
4801
4802 if (rc < 0) {
4803 tp_features.light = 0;
4804 tp_features.light_status = 0;
4805 } else {
4806 rc = 0;
4807 }
4808
4809 return rc;
4810 }
4811
4812 static void light_exit(void)
4813 {
4814 led_classdev_unregister(&tpacpi_led_thinklight.led_classdev);
4815 if (work_pending(&tpacpi_led_thinklight.work))
4816 flush_workqueue(tpacpi_wq);
4817 }
4818
4819 static int light_read(char *p)
4820 {
4821 int len = 0;
4822 int status;
4823
4824 if (!tp_features.light) {
4825 len += sprintf(p + len, "status:\t\tnot supported\n");
4826 } else if (!tp_features.light_status) {
4827 len += sprintf(p + len, "status:\t\tunknown\n");
4828 len += sprintf(p + len, "commands:\ton, off\n");
4829 } else {
4830 status = light_get_status();
4831 if (status < 0)
4832 return status;
4833 len += sprintf(p + len, "status:\t\t%s\n", onoff(status, 0));
4834 len += sprintf(p + len, "commands:\ton, off\n");
4835 }
4836
4837 return len;
4838 }
4839
4840 static int light_write(char *buf)
4841 {
4842 char *cmd;
4843 int newstatus = 0;
4844
4845 if (!tp_features.light)
4846 return -ENODEV;
4847
4848 while ((cmd = next_cmd(&buf))) {
4849 if (strlencmp(cmd, "on") == 0) {
4850 newstatus = 1;
4851 } else if (strlencmp(cmd, "off") == 0) {
4852 newstatus = 0;
4853 } else
4854 return -EINVAL;
4855 }
4856
4857 return light_set_status(newstatus);
4858 }
4859
4860 static struct ibm_struct light_driver_data = {
4861 .name = "light",
4862 .read = light_read,
4863 .write = light_write,
4864 .exit = light_exit,
4865 };
4866
4867 /*************************************************************************
4868 * CMOS subdriver
4869 */
4870
4871 /* sysfs cmos_command -------------------------------------------------- */
4872 static ssize_t cmos_command_store(struct device *dev,
4873 struct device_attribute *attr,
4874 const char *buf, size_t count)
4875 {
4876 unsigned long cmos_cmd;
4877 int res;
4878
4879 if (parse_strtoul(buf, 21, &cmos_cmd))
4880 return -EINVAL;
4881
4882 res = issue_thinkpad_cmos_command(cmos_cmd);
4883 return (res)? res : count;
4884 }
4885
4886 static struct device_attribute dev_attr_cmos_command =
4887 __ATTR(cmos_command, S_IWUSR, NULL, cmos_command_store);
4888
4889 /* --------------------------------------------------------------------- */
4890
4891 static int __init cmos_init(struct ibm_init_struct *iibm)
4892 {
4893 int res;
4894
4895 vdbg_printk(TPACPI_DBG_INIT,
4896 "initializing cmos commands subdriver\n");
4897
4898 TPACPI_ACPIHANDLE_INIT(cmos);
4899
4900 vdbg_printk(TPACPI_DBG_INIT, "cmos commands are %s\n",
4901 str_supported(cmos_handle != NULL));
4902
4903 res = device_create_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
4904 if (res)
4905 return res;
4906
4907 return (cmos_handle)? 0 : 1;
4908 }
4909
4910 static void cmos_exit(void)
4911 {
4912 device_remove_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
4913 }
4914
4915 static int cmos_read(char *p)
4916 {
4917 int len = 0;
4918
4919 /* cmos not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
4920 R30, R31, T20-22, X20-21 */
4921 if (!cmos_handle)
4922 len += sprintf(p + len, "status:\t\tnot supported\n");
4923 else {
4924 len += sprintf(p + len, "status:\t\tsupported\n");
4925 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-21)\n");
4926 }
4927
4928 return len;
4929 }
4930
4931 static int cmos_write(char *buf)
4932 {
4933 char *cmd;
4934 int cmos_cmd, res;
4935
4936 while ((cmd = next_cmd(&buf))) {
4937 if (sscanf(cmd, "%u", &cmos_cmd) == 1 &&
4938 cmos_cmd >= 0 && cmos_cmd <= 21) {
4939 /* cmos_cmd set */
4940 } else
4941 return -EINVAL;
4942
4943 res = issue_thinkpad_cmos_command(cmos_cmd);
4944 if (res)
4945 return res;
4946 }
4947
4948 return 0;
4949 }
4950
4951 static struct ibm_struct cmos_driver_data = {
4952 .name = "cmos",
4953 .read = cmos_read,
4954 .write = cmos_write,
4955 .exit = cmos_exit,
4956 };
4957
4958 /*************************************************************************
4959 * LED subdriver
4960 */
4961
4962 enum led_access_mode {
4963 TPACPI_LED_NONE = 0,
4964 TPACPI_LED_570, /* 570 */
4965 TPACPI_LED_OLD, /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
4966 TPACPI_LED_NEW, /* all others */
4967 };
4968
4969 enum { /* For TPACPI_LED_OLD */
4970 TPACPI_LED_EC_HLCL = 0x0c, /* EC reg to get led to power on */
4971 TPACPI_LED_EC_HLBL = 0x0d, /* EC reg to blink a lit led */
4972 TPACPI_LED_EC_HLMS = 0x0e, /* EC reg to select led to command */
4973 };
4974
4975 static enum led_access_mode led_supported;
4976
4977 TPACPI_HANDLE(led, ec, "SLED", /* 570 */
4978 "SYSL", /* 600e/x, 770e, 770x, A21e, A2xm/p, */
4979 /* T20-22, X20-21 */
4980 "LED", /* all others */
4981 ); /* R30, R31 */
4982
4983 #define TPACPI_LED_NUMLEDS 16
4984 static struct tpacpi_led_classdev *tpacpi_leds;
4985 static enum led_status_t tpacpi_led_state_cache[TPACPI_LED_NUMLEDS];
4986 static const char * const tpacpi_led_names[TPACPI_LED_NUMLEDS] = {
4987 /* there's a limit of 19 chars + NULL before 2.6.26 */
4988 "tpacpi::power",
4989 "tpacpi:orange:batt",
4990 "tpacpi:green:batt",
4991 "tpacpi::dock_active",
4992 "tpacpi::bay_active",
4993 "tpacpi::dock_batt",
4994 "tpacpi::unknown_led",
4995 "tpacpi::standby",
4996 "tpacpi::dock_status1",
4997 "tpacpi::dock_status2",
4998 "tpacpi::unknown_led2",
4999 "tpacpi::unknown_led3",
5000 "tpacpi::thinkvantage",
5001 };
5002 #define TPACPI_SAFE_LEDS 0x1081U
5003
5004 static inline bool tpacpi_is_led_restricted(const unsigned int led)
5005 {
5006 #ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS
5007 return false;
5008 #else
5009 return (1U & (TPACPI_SAFE_LEDS >> led)) == 0;
5010 #endif
5011 }
5012
5013 static int led_get_status(const unsigned int led)
5014 {
5015 int status;
5016 enum led_status_t led_s;
5017
5018 switch (led_supported) {
5019 case TPACPI_LED_570:
5020 if (!acpi_evalf(ec_handle,
5021 &status, "GLED", "dd", 1 << led))
5022 return -EIO;
5023 led_s = (status == 0)?
5024 TPACPI_LED_OFF :
5025 ((status == 1)?
5026 TPACPI_LED_ON :
5027 TPACPI_LED_BLINK);
5028 tpacpi_led_state_cache[led] = led_s;
5029 return led_s;
5030 default:
5031 return -ENXIO;
5032 }
5033
5034 /* not reached */
5035 }
5036
5037 static int led_set_status(const unsigned int led,
5038 const enum led_status_t ledstatus)
5039 {
5040 /* off, on, blink. Index is led_status_t */
5041 static const unsigned int led_sled_arg1[] = { 0, 1, 3 };
5042 static const unsigned int led_led_arg1[] = { 0, 0x80, 0xc0 };
5043
5044 int rc = 0;
5045
5046 switch (led_supported) {
5047 case TPACPI_LED_570:
5048 /* 570 */
5049 if (unlikely(led > 7))
5050 return -EINVAL;
5051 if (unlikely(tpacpi_is_led_restricted(led)))
5052 return -EPERM;
5053 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
5054 (1 << led), led_sled_arg1[ledstatus]))
5055 rc = -EIO;
5056 break;
5057 case TPACPI_LED_OLD:
5058 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */
5059 if (unlikely(led > 7))
5060 return -EINVAL;
5061 if (unlikely(tpacpi_is_led_restricted(led)))
5062 return -EPERM;
5063 rc = ec_write(TPACPI_LED_EC_HLMS, (1 << led));
5064 if (rc >= 0)
5065 rc = ec_write(TPACPI_LED_EC_HLBL,
5066 (ledstatus == TPACPI_LED_BLINK) << led);
5067 if (rc >= 0)
5068 rc = ec_write(TPACPI_LED_EC_HLCL,
5069 (ledstatus != TPACPI_LED_OFF) << led);
5070 break;
5071 case TPACPI_LED_NEW:
5072 /* all others */
5073 if (unlikely(led >= TPACPI_LED_NUMLEDS))
5074 return -EINVAL;
5075 if (unlikely(tpacpi_is_led_restricted(led)))
5076 return -EPERM;
5077 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
5078 led, led_led_arg1[ledstatus]))
5079 rc = -EIO;
5080 break;
5081 default:
5082 rc = -ENXIO;
5083 }
5084
5085 if (!rc)
5086 tpacpi_led_state_cache[led] = ledstatus;
5087
5088 return rc;
5089 }
5090
5091 static void led_set_status_worker(struct work_struct *work)
5092 {
5093 struct tpacpi_led_classdev *data =
5094 container_of(work, struct tpacpi_led_classdev, work);
5095
5096 if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING))
5097 led_set_status(data->led, data->new_state);
5098 }
5099
5100 static void led_sysfs_set(struct led_classdev *led_cdev,
5101 enum led_brightness brightness)
5102 {
5103 struct tpacpi_led_classdev *data = container_of(led_cdev,
5104 struct tpacpi_led_classdev, led_classdev);
5105
5106 if (brightness == LED_OFF)
5107 data->new_state = TPACPI_LED_OFF;
5108 else if (tpacpi_led_state_cache[data->led] != TPACPI_LED_BLINK)
5109 data->new_state = TPACPI_LED_ON;
5110 else
5111 data->new_state = TPACPI_LED_BLINK;
5112
5113 queue_work(tpacpi_wq, &data->work);
5114 }
5115
5116 static int led_sysfs_blink_set(struct led_classdev *led_cdev,
5117 unsigned long *delay_on, unsigned long *delay_off)
5118 {
5119 struct tpacpi_led_classdev *data = container_of(led_cdev,
5120 struct tpacpi_led_classdev, led_classdev);
5121
5122 /* Can we choose the flash rate? */
5123 if (*delay_on == 0 && *delay_off == 0) {
5124 /* yes. set them to the hardware blink rate (1 Hz) */
5125 *delay_on = 500; /* ms */
5126 *delay_off = 500; /* ms */
5127 } else if ((*delay_on != 500) || (*delay_off != 500))
5128 return -EINVAL;
5129
5130 data->new_state = TPACPI_LED_BLINK;
5131 queue_work(tpacpi_wq, &data->work);
5132
5133 return 0;
5134 }
5135
5136 static enum led_brightness led_sysfs_get(struct led_classdev *led_cdev)
5137 {
5138 int rc;
5139
5140 struct tpacpi_led_classdev *data = container_of(led_cdev,
5141 struct tpacpi_led_classdev, led_classdev);
5142
5143 rc = led_get_status(data->led);
5144
5145 if (rc == TPACPI_LED_OFF || rc < 0)
5146 rc = LED_OFF; /* no error handling in led class :( */
5147 else
5148 rc = LED_FULL;
5149
5150 return rc;
5151 }
5152
5153 static void led_exit(void)
5154 {
5155 unsigned int i;
5156
5157 for (i = 0; i < TPACPI_LED_NUMLEDS; i++) {
5158 if (tpacpi_leds[i].led_classdev.name)
5159 led_classdev_unregister(&tpacpi_leds[i].led_classdev);
5160 }
5161
5162 kfree(tpacpi_leds);
5163 }
5164
5165 static int __init tpacpi_init_led(unsigned int led)
5166 {
5167 int rc;
5168
5169 tpacpi_leds[led].led = led;
5170
5171 /* LEDs with no name don't get registered */
5172 if (!tpacpi_led_names[led])
5173 return 0;
5174
5175 tpacpi_leds[led].led_classdev.brightness_set = &led_sysfs_set;
5176 tpacpi_leds[led].led_classdev.blink_set = &led_sysfs_blink_set;
5177 if (led_supported == TPACPI_LED_570)
5178 tpacpi_leds[led].led_classdev.brightness_get =
5179 &led_sysfs_get;
5180
5181 tpacpi_leds[led].led_classdev.name = tpacpi_led_names[led];
5182
5183 INIT_WORK(&tpacpi_leds[led].work, led_set_status_worker);
5184
5185 rc = led_classdev_register(&tpacpi_pdev->dev,
5186 &tpacpi_leds[led].led_classdev);
5187 if (rc < 0)
5188 tpacpi_leds[led].led_classdev.name = NULL;
5189
5190 return rc;
5191 }
5192
5193 static const struct tpacpi_quirk led_useful_qtable[] __initconst = {
5194 TPACPI_Q_IBM('1', 'E', 0x009f), /* A30 */
5195 TPACPI_Q_IBM('1', 'N', 0x009f), /* A31 */
5196 TPACPI_Q_IBM('1', 'G', 0x009f), /* A31 */
5197
5198 TPACPI_Q_IBM('1', 'I', 0x0097), /* T30 */
5199 TPACPI_Q_IBM('1', 'R', 0x0097), /* T40, T41, T42, R50, R51 */
5200 TPACPI_Q_IBM('7', '0', 0x0097), /* T43, R52 */
5201 TPACPI_Q_IBM('1', 'Y', 0x0097), /* T43 */
5202 TPACPI_Q_IBM('1', 'W', 0x0097), /* R50e */
5203 TPACPI_Q_IBM('1', 'V', 0x0097), /* R51 */
5204 TPACPI_Q_IBM('7', '8', 0x0097), /* R51e */
5205 TPACPI_Q_IBM('7', '6', 0x0097), /* R52 */
5206
5207 TPACPI_Q_IBM('1', 'K', 0x00bf), /* X30 */
5208 TPACPI_Q_IBM('1', 'Q', 0x00bf), /* X31, X32 */
5209 TPACPI_Q_IBM('1', 'U', 0x00bf), /* X40 */
5210 TPACPI_Q_IBM('7', '4', 0x00bf), /* X41 */
5211 TPACPI_Q_IBM('7', '5', 0x00bf), /* X41t */
5212
5213 TPACPI_Q_IBM('7', '9', 0x1f97), /* T60 (1) */
5214 TPACPI_Q_IBM('7', '7', 0x1f97), /* Z60* (1) */
5215 TPACPI_Q_IBM('7', 'F', 0x1f97), /* Z61* (1) */
5216 TPACPI_Q_IBM('7', 'B', 0x1fb7), /* X60 (1) */
5217
5218 /* (1) - may have excess leds enabled on MSB */
5219
5220 /* Defaults (order matters, keep last, don't reorder!) */
5221 { /* Lenovo */
5222 .vendor = PCI_VENDOR_ID_LENOVO,
5223 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY,
5224 .quirks = 0x1fffU,
5225 },
5226 { /* IBM ThinkPads with no EC version string */
5227 .vendor = PCI_VENDOR_ID_IBM,
5228 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_UNKNOWN,
5229 .quirks = 0x00ffU,
5230 },
5231 { /* IBM ThinkPads with EC version string */
5232 .vendor = PCI_VENDOR_ID_IBM,
5233 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY,
5234 .quirks = 0x00bfU,
5235 },
5236 };
5237
5238 #undef TPACPI_LEDQ_IBM
5239 #undef TPACPI_LEDQ_LNV
5240
5241 static int __init led_init(struct ibm_init_struct *iibm)
5242 {
5243 unsigned int i;
5244 int rc;
5245 unsigned long useful_leds;
5246
5247 vdbg_printk(TPACPI_DBG_INIT, "initializing LED subdriver\n");
5248
5249 TPACPI_ACPIHANDLE_INIT(led);
5250
5251 if (!led_handle)
5252 /* led not supported on R30, R31 */
5253 led_supported = TPACPI_LED_NONE;
5254 else if (strlencmp(led_path, "SLED") == 0)
5255 /* 570 */
5256 led_supported = TPACPI_LED_570;
5257 else if (strlencmp(led_path, "SYSL") == 0)
5258 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
5259 led_supported = TPACPI_LED_OLD;
5260 else
5261 /* all others */
5262 led_supported = TPACPI_LED_NEW;
5263
5264 vdbg_printk(TPACPI_DBG_INIT, "LED commands are %s, mode %d\n",
5265 str_supported(led_supported), led_supported);
5266
5267 if (led_supported == TPACPI_LED_NONE)
5268 return 1;
5269
5270 tpacpi_leds = kzalloc(sizeof(*tpacpi_leds) * TPACPI_LED_NUMLEDS,
5271 GFP_KERNEL);
5272 if (!tpacpi_leds) {
5273 printk(TPACPI_ERR "Out of memory for LED data\n");
5274 return -ENOMEM;
5275 }
5276
5277 useful_leds = tpacpi_check_quirks(led_useful_qtable,
5278 ARRAY_SIZE(led_useful_qtable));
5279
5280 for (i = 0; i < TPACPI_LED_NUMLEDS; i++) {
5281 if (!tpacpi_is_led_restricted(i) &&
5282 test_bit(i, &useful_leds)) {
5283 rc = tpacpi_init_led(i);
5284 if (rc < 0) {
5285 led_exit();
5286 return rc;
5287 }
5288 }
5289 }
5290
5291 #ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS
5292 printk(TPACPI_NOTICE
5293 "warning: userspace override of important "
5294 "firmware LEDs is enabled\n");
5295 #endif
5296 return 0;
5297 }
5298
5299 #define str_led_status(s) \
5300 ((s) == TPACPI_LED_OFF ? "off" : \
5301 ((s) == TPACPI_LED_ON ? "on" : "blinking"))
5302
5303 static int led_read(char *p)
5304 {
5305 int len = 0;
5306
5307 if (!led_supported) {
5308 len += sprintf(p + len, "status:\t\tnot supported\n");
5309 return len;
5310 }
5311 len += sprintf(p + len, "status:\t\tsupported\n");
5312
5313 if (led_supported == TPACPI_LED_570) {
5314 /* 570 */
5315 int i, status;
5316 for (i = 0; i < 8; i++) {
5317 status = led_get_status(i);
5318 if (status < 0)
5319 return -EIO;
5320 len += sprintf(p + len, "%d:\t\t%s\n",
5321 i, str_led_status(status));
5322 }
5323 }
5324
5325 len += sprintf(p + len, "commands:\t"
5326 "<led> on, <led> off, <led> blink (<led> is 0-15)\n");
5327
5328 return len;
5329 }
5330
5331 static int led_write(char *buf)
5332 {
5333 char *cmd;
5334 int led, rc;
5335 enum led_status_t s;
5336
5337 if (!led_supported)
5338 return -ENODEV;
5339
5340 while ((cmd = next_cmd(&buf))) {
5341 if (sscanf(cmd, "%d", &led) != 1 || led < 0 || led > 15)
5342 return -EINVAL;
5343
5344 if (strstr(cmd, "off")) {
5345 s = TPACPI_LED_OFF;
5346 } else if (strstr(cmd, "on")) {
5347 s = TPACPI_LED_ON;
5348 } else if (strstr(cmd, "blink")) {
5349 s = TPACPI_LED_BLINK;
5350 } else {
5351 return -EINVAL;
5352 }
5353
5354 rc = led_set_status(led, s);
5355 if (rc < 0)
5356 return rc;
5357 }
5358
5359 return 0;
5360 }
5361
5362 static struct ibm_struct led_driver_data = {
5363 .name = "led",
5364 .read = led_read,
5365 .write = led_write,
5366 .exit = led_exit,
5367 };
5368
5369 /*************************************************************************
5370 * Beep subdriver
5371 */
5372
5373 TPACPI_HANDLE(beep, ec, "BEEP"); /* all except R30, R31 */
5374
5375 #define TPACPI_BEEP_Q1 0x0001
5376
5377 static const struct tpacpi_quirk beep_quirk_table[] __initconst = {
5378 TPACPI_Q_IBM('I', 'M', TPACPI_BEEP_Q1), /* 570 */
5379 TPACPI_Q_IBM('I', 'U', TPACPI_BEEP_Q1), /* 570E - unverified */
5380 };
5381
5382 static int __init beep_init(struct ibm_init_struct *iibm)
5383 {
5384 unsigned long quirks;
5385
5386 vdbg_printk(TPACPI_DBG_INIT, "initializing beep subdriver\n");
5387
5388 TPACPI_ACPIHANDLE_INIT(beep);
5389
5390 vdbg_printk(TPACPI_DBG_INIT, "beep is %s\n",
5391 str_supported(beep_handle != NULL));
5392
5393 quirks = tpacpi_check_quirks(beep_quirk_table,
5394 ARRAY_SIZE(beep_quirk_table));
5395
5396 tp_features.beep_needs_two_args = !!(quirks & TPACPI_BEEP_Q1);
5397
5398 return (beep_handle)? 0 : 1;
5399 }
5400
5401 static int beep_read(char *p)
5402 {
5403 int len = 0;
5404
5405 if (!beep_handle)
5406 len += sprintf(p + len, "status:\t\tnot supported\n");
5407 else {
5408 len += sprintf(p + len, "status:\t\tsupported\n");
5409 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-17)\n");
5410 }
5411
5412 return len;
5413 }
5414
5415 static int beep_write(char *buf)
5416 {
5417 char *cmd;
5418 int beep_cmd;
5419
5420 if (!beep_handle)
5421 return -ENODEV;
5422
5423 while ((cmd = next_cmd(&buf))) {
5424 if (sscanf(cmd, "%u", &beep_cmd) == 1 &&
5425 beep_cmd >= 0 && beep_cmd <= 17) {
5426 /* beep_cmd set */
5427 } else
5428 return -EINVAL;
5429 if (tp_features.beep_needs_two_args) {
5430 if (!acpi_evalf(beep_handle, NULL, NULL, "vdd",
5431 beep_cmd, 0))
5432 return -EIO;
5433 } else {
5434 if (!acpi_evalf(beep_handle, NULL, NULL, "vd",
5435 beep_cmd))
5436 return -EIO;
5437 }
5438 }
5439
5440 return 0;
5441 }
5442
5443 static struct ibm_struct beep_driver_data = {
5444 .name = "beep",
5445 .read = beep_read,
5446 .write = beep_write,
5447 };
5448
5449 /*************************************************************************
5450 * Thermal subdriver
5451 */
5452
5453 enum thermal_access_mode {
5454 TPACPI_THERMAL_NONE = 0, /* No thermal support */
5455 TPACPI_THERMAL_ACPI_TMP07, /* Use ACPI TMP0-7 */
5456 TPACPI_THERMAL_ACPI_UPDT, /* Use ACPI TMP0-7 with UPDT */
5457 TPACPI_THERMAL_TPEC_8, /* Use ACPI EC regs, 8 sensors */
5458 TPACPI_THERMAL_TPEC_16, /* Use ACPI EC regs, 16 sensors */
5459 };
5460
5461 enum { /* TPACPI_THERMAL_TPEC_* */
5462 TP_EC_THERMAL_TMP0 = 0x78, /* ACPI EC regs TMP 0..7 */
5463 TP_EC_THERMAL_TMP8 = 0xC0, /* ACPI EC regs TMP 8..15 */
5464 TP_EC_THERMAL_TMP_NA = -128, /* ACPI EC sensor not available */
5465 };
5466
5467 #define TPACPI_MAX_THERMAL_SENSORS 16 /* Max thermal sensors supported */
5468 struct ibm_thermal_sensors_struct {
5469 s32 temp[TPACPI_MAX_THERMAL_SENSORS];
5470 };
5471
5472 static enum thermal_access_mode thermal_read_mode;
5473
5474 /* idx is zero-based */
5475 static int thermal_get_sensor(int idx, s32 *value)
5476 {
5477 int t;
5478 s8 tmp;
5479 char tmpi[5];
5480
5481 t = TP_EC_THERMAL_TMP0;
5482
5483 switch (thermal_read_mode) {
5484 #if TPACPI_MAX_THERMAL_SENSORS >= 16
5485 case TPACPI_THERMAL_TPEC_16:
5486 if (idx >= 8 && idx <= 15) {
5487 t = TP_EC_THERMAL_TMP8;
5488 idx -= 8;
5489 }
5490 /* fallthrough */
5491 #endif
5492 case TPACPI_THERMAL_TPEC_8:
5493 if (idx <= 7) {
5494 if (!acpi_ec_read(t + idx, &tmp))
5495 return -EIO;
5496 *value = tmp * 1000;
5497 return 0;
5498 }
5499 break;
5500
5501 case TPACPI_THERMAL_ACPI_UPDT:
5502 if (idx <= 7) {
5503 snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
5504 if (!acpi_evalf(ec_handle, NULL, "UPDT", "v"))
5505 return -EIO;
5506 if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
5507 return -EIO;
5508 *value = (t - 2732) * 100;
5509 return 0;
5510 }
5511 break;
5512
5513 case TPACPI_THERMAL_ACPI_TMP07:
5514 if (idx <= 7) {
5515 snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
5516 if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
5517 return -EIO;
5518 if (t > 127 || t < -127)
5519 t = TP_EC_THERMAL_TMP_NA;
5520 *value = t * 1000;
5521 return 0;
5522 }
5523 break;
5524
5525 case TPACPI_THERMAL_NONE:
5526 default:
5527 return -ENOSYS;
5528 }
5529
5530 return -EINVAL;
5531 }
5532
5533 static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s)
5534 {
5535 int res, i;
5536 int n;
5537
5538 n = 8;
5539 i = 0;
5540
5541 if (!s)
5542 return -EINVAL;
5543
5544 if (thermal_read_mode == TPACPI_THERMAL_TPEC_16)
5545 n = 16;
5546
5547 for (i = 0 ; i < n; i++) {
5548 res = thermal_get_sensor(i, &s->temp[i]);
5549 if (res)
5550 return res;
5551 }
5552
5553 return n;
5554 }
5555
5556 /* sysfs temp##_input -------------------------------------------------- */
5557
5558 static ssize_t thermal_temp_input_show(struct device *dev,
5559 struct device_attribute *attr,
5560 char *buf)
5561 {
5562 struct sensor_device_attribute *sensor_attr =
5563 to_sensor_dev_attr(attr);
5564 int idx = sensor_attr->index;
5565 s32 value;
5566 int res;
5567
5568 res = thermal_get_sensor(idx, &value);
5569 if (res)
5570 return res;
5571 if (value == TP_EC_THERMAL_TMP_NA * 1000)
5572 return -ENXIO;
5573
5574 return snprintf(buf, PAGE_SIZE, "%d\n", value);
5575 }
5576
5577 #define THERMAL_SENSOR_ATTR_TEMP(_idxA, _idxB) \
5578 SENSOR_ATTR(temp##_idxA##_input, S_IRUGO, \
5579 thermal_temp_input_show, NULL, _idxB)
5580
5581 static struct sensor_device_attribute sensor_dev_attr_thermal_temp_input[] = {
5582 THERMAL_SENSOR_ATTR_TEMP(1, 0),
5583 THERMAL_SENSOR_ATTR_TEMP(2, 1),
5584 THERMAL_SENSOR_ATTR_TEMP(3, 2),
5585 THERMAL_SENSOR_ATTR_TEMP(4, 3),
5586 THERMAL_SENSOR_ATTR_TEMP(5, 4),
5587 THERMAL_SENSOR_ATTR_TEMP(6, 5),
5588 THERMAL_SENSOR_ATTR_TEMP(7, 6),
5589 THERMAL_SENSOR_ATTR_TEMP(8, 7),
5590 THERMAL_SENSOR_ATTR_TEMP(9, 8),
5591 THERMAL_SENSOR_ATTR_TEMP(10, 9),
5592 THERMAL_SENSOR_ATTR_TEMP(11, 10),
5593 THERMAL_SENSOR_ATTR_TEMP(12, 11),
5594 THERMAL_SENSOR_ATTR_TEMP(13, 12),
5595 THERMAL_SENSOR_ATTR_TEMP(14, 13),
5596 THERMAL_SENSOR_ATTR_TEMP(15, 14),
5597 THERMAL_SENSOR_ATTR_TEMP(16, 15),
5598 };
5599
5600 #define THERMAL_ATTRS(X) \
5601 &sensor_dev_attr_thermal_temp_input[X].dev_attr.attr
5602
5603 static struct attribute *thermal_temp_input_attr[] = {
5604 THERMAL_ATTRS(8),
5605 THERMAL_ATTRS(9),
5606 THERMAL_ATTRS(10),
5607 THERMAL_ATTRS(11),
5608 THERMAL_ATTRS(12),
5609 THERMAL_ATTRS(13),
5610 THERMAL_ATTRS(14),
5611 THERMAL_ATTRS(15),
5612 THERMAL_ATTRS(0),
5613 THERMAL_ATTRS(1),
5614 THERMAL_ATTRS(2),
5615 THERMAL_ATTRS(3),
5616 THERMAL_ATTRS(4),
5617 THERMAL_ATTRS(5),
5618 THERMAL_ATTRS(6),
5619 THERMAL_ATTRS(7),
5620 NULL
5621 };
5622
5623 static const struct attribute_group thermal_temp_input16_group = {
5624 .attrs = thermal_temp_input_attr
5625 };
5626
5627 static const struct attribute_group thermal_temp_input8_group = {
5628 .attrs = &thermal_temp_input_attr[8]
5629 };
5630
5631 #undef THERMAL_SENSOR_ATTR_TEMP
5632 #undef THERMAL_ATTRS
5633
5634 /* --------------------------------------------------------------------- */
5635
5636 static int __init thermal_init(struct ibm_init_struct *iibm)
5637 {
5638 u8 t, ta1, ta2;
5639 int i;
5640 int acpi_tmp7;
5641 int res;
5642
5643 vdbg_printk(TPACPI_DBG_INIT, "initializing thermal subdriver\n");
5644
5645 acpi_tmp7 = acpi_evalf(ec_handle, NULL, "TMP7", "qv");
5646
5647 if (thinkpad_id.ec_model) {
5648 /*
5649 * Direct EC access mode: sensors at registers
5650 * 0x78-0x7F, 0xC0-0xC7. Registers return 0x00 for
5651 * non-implemented, thermal sensors return 0x80 when
5652 * not available
5653 */
5654
5655 ta1 = ta2 = 0;
5656 for (i = 0; i < 8; i++) {
5657 if (acpi_ec_read(TP_EC_THERMAL_TMP0 + i, &t)) {
5658 ta1 |= t;
5659 } else {
5660 ta1 = 0;
5661 break;
5662 }
5663 if (acpi_ec_read(TP_EC_THERMAL_TMP8 + i, &t)) {
5664 ta2 |= t;
5665 } else {
5666 ta1 = 0;
5667 break;
5668 }
5669 }
5670 if (ta1 == 0) {
5671 /* This is sheer paranoia, but we handle it anyway */
5672 if (acpi_tmp7) {
5673 printk(TPACPI_ERR
5674 "ThinkPad ACPI EC access misbehaving, "
5675 "falling back to ACPI TMPx access "
5676 "mode\n");
5677 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
5678 } else {
5679 printk(TPACPI_ERR
5680 "ThinkPad ACPI EC access misbehaving, "
5681 "disabling thermal sensors access\n");
5682 thermal_read_mode = TPACPI_THERMAL_NONE;
5683 }
5684 } else {
5685 thermal_read_mode =
5686 (ta2 != 0) ?
5687 TPACPI_THERMAL_TPEC_16 : TPACPI_THERMAL_TPEC_8;
5688 }
5689 } else if (acpi_tmp7) {
5690 if (acpi_evalf(ec_handle, NULL, "UPDT", "qv")) {
5691 /* 600e/x, 770e, 770x */
5692 thermal_read_mode = TPACPI_THERMAL_ACPI_UPDT;
5693 } else {
5694 /* Standard ACPI TMPx access, max 8 sensors */
5695 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
5696 }
5697 } else {
5698 /* temperatures not supported on 570, G4x, R30, R31, R32 */
5699 thermal_read_mode = TPACPI_THERMAL_NONE;
5700 }
5701
5702 vdbg_printk(TPACPI_DBG_INIT, "thermal is %s, mode %d\n",
5703 str_supported(thermal_read_mode != TPACPI_THERMAL_NONE),
5704 thermal_read_mode);
5705
5706 switch (thermal_read_mode) {
5707 case TPACPI_THERMAL_TPEC_16:
5708 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
5709 &thermal_temp_input16_group);
5710 if (res)
5711 return res;
5712 break;
5713 case TPACPI_THERMAL_TPEC_8:
5714 case TPACPI_THERMAL_ACPI_TMP07:
5715 case TPACPI_THERMAL_ACPI_UPDT:
5716 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
5717 &thermal_temp_input8_group);
5718 if (res)
5719 return res;
5720 break;
5721 case TPACPI_THERMAL_NONE:
5722 default:
5723 return 1;
5724 }
5725
5726 return 0;
5727 }
5728
5729 static void thermal_exit(void)
5730 {
5731 switch (thermal_read_mode) {
5732 case TPACPI_THERMAL_TPEC_16:
5733 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
5734 &thermal_temp_input16_group);
5735 break;
5736 case TPACPI_THERMAL_TPEC_8:
5737 case TPACPI_THERMAL_ACPI_TMP07:
5738 case TPACPI_THERMAL_ACPI_UPDT:
5739 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
5740 &thermal_temp_input16_group);
5741 break;
5742 case TPACPI_THERMAL_NONE:
5743 default:
5744 break;
5745 }
5746 }
5747
5748 static int thermal_read(char *p)
5749 {
5750 int len = 0;
5751 int n, i;
5752 struct ibm_thermal_sensors_struct t;
5753
5754 n = thermal_get_sensors(&t);
5755 if (unlikely(n < 0))
5756 return n;
5757
5758 len += sprintf(p + len, "temperatures:\t");
5759
5760 if (n > 0) {
5761 for (i = 0; i < (n - 1); i++)
5762 len += sprintf(p + len, "%d ", t.temp[i] / 1000);
5763 len += sprintf(p + len, "%d\n", t.temp[i] / 1000);
5764 } else
5765 len += sprintf(p + len, "not supported\n");
5766
5767 return len;
5768 }
5769
5770 static struct ibm_struct thermal_driver_data = {
5771 .name = "thermal",
5772 .read = thermal_read,
5773 .exit = thermal_exit,
5774 };
5775
5776 /*************************************************************************
5777 * EC Dump subdriver
5778 */
5779
5780 static u8 ecdump_regs[256];
5781
5782 static int ecdump_read(char *p)
5783 {
5784 int len = 0;
5785 int i, j;
5786 u8 v;
5787
5788 len += sprintf(p + len, "EC "
5789 " +00 +01 +02 +03 +04 +05 +06 +07"
5790 " +08 +09 +0a +0b +0c +0d +0e +0f\n");
5791 for (i = 0; i < 256; i += 16) {
5792 len += sprintf(p + len, "EC 0x%02x:", i);
5793 for (j = 0; j < 16; j++) {
5794 if (!acpi_ec_read(i + j, &v))
5795 break;
5796 if (v != ecdump_regs[i + j])
5797 len += sprintf(p + len, " *%02x", v);
5798 else
5799 len += sprintf(p + len, " %02x", v);
5800 ecdump_regs[i + j] = v;
5801 }
5802 len += sprintf(p + len, "\n");
5803 if (j != 16)
5804 break;
5805 }
5806
5807 /* These are way too dangerous to advertise openly... */
5808 #if 0
5809 len += sprintf(p + len, "commands:\t0x<offset> 0x<value>"
5810 " (<offset> is 00-ff, <value> is 00-ff)\n");
5811 len += sprintf(p + len, "commands:\t0x<offset> <value> "
5812 " (<offset> is 00-ff, <value> is 0-255)\n");
5813 #endif
5814 return len;
5815 }
5816
5817 static int ecdump_write(char *buf)
5818 {
5819 char *cmd;
5820 int i, v;
5821
5822 while ((cmd = next_cmd(&buf))) {
5823 if (sscanf(cmd, "0x%x 0x%x", &i, &v) == 2) {
5824 /* i and v set */
5825 } else if (sscanf(cmd, "0x%x %u", &i, &v) == 2) {
5826 /* i and v set */
5827 } else
5828 return -EINVAL;
5829 if (i >= 0 && i < 256 && v >= 0 && v < 256) {
5830 if (!acpi_ec_write(i, v))
5831 return -EIO;
5832 } else
5833 return -EINVAL;
5834 }
5835
5836 return 0;
5837 }
5838
5839 static struct ibm_struct ecdump_driver_data = {
5840 .name = "ecdump",
5841 .read = ecdump_read,
5842 .write = ecdump_write,
5843 .flags.experimental = 1,
5844 };
5845
5846 /*************************************************************************
5847 * Backlight/brightness subdriver
5848 */
5849
5850 #define TPACPI_BACKLIGHT_DEV_NAME "thinkpad_screen"
5851
5852 /*
5853 * ThinkPads can read brightness from two places: EC HBRV (0x31), or
5854 * CMOS NVRAM byte 0x5E, bits 0-3.
5855 *
5856 * EC HBRV (0x31) has the following layout
5857 * Bit 7: unknown function
5858 * Bit 6: unknown function
5859 * Bit 5: Z: honour scale changes, NZ: ignore scale changes
5860 * Bit 4: must be set to zero to avoid problems
5861 * Bit 3-0: backlight brightness level
5862 *
5863 * brightness_get_raw returns status data in the HBRV layout
5864 *
5865 * WARNING: The X61 has been verified to use HBRV for something else, so
5866 * this should be used _only_ on IBM ThinkPads, and maybe with some careful
5867 * testing on the very early *60 Lenovo models...
5868 */
5869
5870 enum {
5871 TP_EC_BACKLIGHT = 0x31,
5872
5873 /* TP_EC_BACKLIGHT bitmasks */
5874 TP_EC_BACKLIGHT_LVLMSK = 0x1F,
5875 TP_EC_BACKLIGHT_CMDMSK = 0xE0,
5876 TP_EC_BACKLIGHT_MAPSW = 0x20,
5877 };
5878
5879 enum tpacpi_brightness_access_mode {
5880 TPACPI_BRGHT_MODE_AUTO = 0, /* Not implemented yet */
5881 TPACPI_BRGHT_MODE_EC, /* EC control */
5882 TPACPI_BRGHT_MODE_UCMS_STEP, /* UCMS step-based control */
5883 TPACPI_BRGHT_MODE_ECNVRAM, /* EC control w/ NVRAM store */
5884 TPACPI_BRGHT_MODE_MAX
5885 };
5886
5887 static struct backlight_device *ibm_backlight_device;
5888
5889 static enum tpacpi_brightness_access_mode brightness_mode =
5890 TPACPI_BRGHT_MODE_MAX;
5891
5892 static unsigned int brightness_enable = 2; /* 2 = auto, 0 = no, 1 = yes */
5893
5894 static struct mutex brightness_mutex;
5895
5896 /* NVRAM brightness access,
5897 * call with brightness_mutex held! */
5898 static unsigned int tpacpi_brightness_nvram_get(void)
5899 {
5900 u8 lnvram;
5901
5902 lnvram = (nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS)
5903 & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
5904 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
5905 lnvram &= (tp_features.bright_16levels) ? 0x0f : 0x07;
5906
5907 return lnvram;
5908 }
5909
5910 static void tpacpi_brightness_checkpoint_nvram(void)
5911 {
5912 u8 lec = 0;
5913 u8 b_nvram;
5914
5915 if (brightness_mode != TPACPI_BRGHT_MODE_ECNVRAM)
5916 return;
5917
5918 vdbg_printk(TPACPI_DBG_BRGHT,
5919 "trying to checkpoint backlight level to NVRAM...\n");
5920
5921 if (mutex_lock_killable(&brightness_mutex) < 0)
5922 return;
5923
5924 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
5925 goto unlock;
5926 lec &= TP_EC_BACKLIGHT_LVLMSK;
5927 b_nvram = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS);
5928
5929 if (lec != ((b_nvram & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
5930 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS)) {
5931 /* NVRAM needs update */
5932 b_nvram &= ~(TP_NVRAM_MASK_LEVEL_BRIGHTNESS <<
5933 TP_NVRAM_POS_LEVEL_BRIGHTNESS);
5934 b_nvram |= lec;
5935 nvram_write_byte(b_nvram, TP_NVRAM_ADDR_BRIGHTNESS);
5936 dbg_printk(TPACPI_DBG_BRGHT,
5937 "updated NVRAM backlight level to %u (0x%02x)\n",
5938 (unsigned int) lec, (unsigned int) b_nvram);
5939 } else
5940 vdbg_printk(TPACPI_DBG_BRGHT,
5941 "NVRAM backlight level already is %u (0x%02x)\n",
5942 (unsigned int) lec, (unsigned int) b_nvram);
5943
5944 unlock:
5945 mutex_unlock(&brightness_mutex);
5946 }
5947
5948
5949 /* call with brightness_mutex held! */
5950 static int tpacpi_brightness_get_raw(int *status)
5951 {
5952 u8 lec = 0;
5953
5954 switch (brightness_mode) {
5955 case TPACPI_BRGHT_MODE_UCMS_STEP:
5956 *status = tpacpi_brightness_nvram_get();
5957 return 0;
5958 case TPACPI_BRGHT_MODE_EC:
5959 case TPACPI_BRGHT_MODE_ECNVRAM:
5960 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
5961 return -EIO;
5962 *status = lec;
5963 return 0;
5964 default:
5965 return -ENXIO;
5966 }
5967 }
5968
5969 /* call with brightness_mutex held! */
5970 /* do NOT call with illegal backlight level value */
5971 static int tpacpi_brightness_set_ec(unsigned int value)
5972 {
5973 u8 lec = 0;
5974
5975 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
5976 return -EIO;
5977
5978 if (unlikely(!acpi_ec_write(TP_EC_BACKLIGHT,
5979 (lec & TP_EC_BACKLIGHT_CMDMSK) |
5980 (value & TP_EC_BACKLIGHT_LVLMSK))))
5981 return -EIO;
5982
5983 return 0;
5984 }
5985
5986 /* call with brightness_mutex held! */
5987 static int tpacpi_brightness_set_ucmsstep(unsigned int value)
5988 {
5989 int cmos_cmd, inc;
5990 unsigned int current_value, i;
5991
5992 current_value = tpacpi_brightness_nvram_get();
5993
5994 if (value == current_value)
5995 return 0;
5996
5997 cmos_cmd = (value > current_value) ?
5998 TP_CMOS_BRIGHTNESS_UP :
5999 TP_CMOS_BRIGHTNESS_DOWN;
6000 inc = (value > current_value) ? 1 : -1;
6001
6002 for (i = current_value; i != value; i += inc)
6003 if (issue_thinkpad_cmos_command(cmos_cmd))
6004 return -EIO;
6005
6006 return 0;
6007 }
6008
6009 /* May return EINTR which can always be mapped to ERESTARTSYS */
6010 static int brightness_set(unsigned int value)
6011 {
6012 int res;
6013
6014 if (value > ((tp_features.bright_16levels)? 15 : 7) ||
6015 value < 0)
6016 return -EINVAL;
6017
6018 vdbg_printk(TPACPI_DBG_BRGHT,
6019 "set backlight level to %d\n", value);
6020
6021 res = mutex_lock_killable(&brightness_mutex);
6022 if (res < 0)
6023 return res;
6024
6025 switch (brightness_mode) {
6026 case TPACPI_BRGHT_MODE_EC:
6027 case TPACPI_BRGHT_MODE_ECNVRAM:
6028 res = tpacpi_brightness_set_ec(value);
6029 break;
6030 case TPACPI_BRGHT_MODE_UCMS_STEP:
6031 res = tpacpi_brightness_set_ucmsstep(value);
6032 break;
6033 default:
6034 res = -ENXIO;
6035 }
6036
6037 mutex_unlock(&brightness_mutex);
6038 return res;
6039 }
6040
6041 /* sysfs backlight class ----------------------------------------------- */
6042
6043 static int brightness_update_status(struct backlight_device *bd)
6044 {
6045 unsigned int level =
6046 (bd->props.fb_blank == FB_BLANK_UNBLANK &&
6047 bd->props.power == FB_BLANK_UNBLANK) ?
6048 bd->props.brightness : 0;
6049
6050 dbg_printk(TPACPI_DBG_BRGHT,
6051 "backlight: attempt to set level to %d\n",
6052 level);
6053
6054 /* it is the backlight class's job (caller) to handle
6055 * EINTR and other errors properly */
6056 return brightness_set(level);
6057 }
6058
6059 static int brightness_get(struct backlight_device *bd)
6060 {
6061 int status, res;
6062
6063 res = mutex_lock_killable(&brightness_mutex);
6064 if (res < 0)
6065 return 0;
6066
6067 res = tpacpi_brightness_get_raw(&status);
6068
6069 mutex_unlock(&brightness_mutex);
6070
6071 if (res < 0)
6072 return 0;
6073
6074 return status & TP_EC_BACKLIGHT_LVLMSK;
6075 }
6076
6077 static void tpacpi_brightness_notify_change(void)
6078 {
6079 backlight_force_update(ibm_backlight_device,
6080 BACKLIGHT_UPDATE_HOTKEY);
6081 }
6082
6083 static struct backlight_ops ibm_backlight_data = {
6084 .get_brightness = brightness_get,
6085 .update_status = brightness_update_status,
6086 };
6087
6088 /* --------------------------------------------------------------------- */
6089
6090 /*
6091 * These are only useful for models that have only one possibility
6092 * of GPU. If the BIOS model handles both ATI and Intel, don't use
6093 * these quirks.
6094 */
6095 #define TPACPI_BRGHT_Q_NOEC 0x0001 /* Must NOT use EC HBRV */
6096 #define TPACPI_BRGHT_Q_EC 0x0002 /* Should or must use EC HBRV */
6097 #define TPACPI_BRGHT_Q_ASK 0x8000 /* Ask for user report */
6098
6099 static const struct tpacpi_quirk brightness_quirk_table[] __initconst = {
6100 /* Models with ATI GPUs known to require ECNVRAM mode */
6101 TPACPI_Q_IBM('1', 'Y', TPACPI_BRGHT_Q_EC), /* T43/p ATI */
6102
6103 /* Models with ATI GPUs that can use ECNVRAM */
6104 TPACPI_Q_IBM('1', 'R', TPACPI_BRGHT_Q_EC),
6105 TPACPI_Q_IBM('1', 'Q', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
6106 TPACPI_Q_IBM('7', '6', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
6107 TPACPI_Q_IBM('7', '8', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
6108
6109 /* Models with Intel Extreme Graphics 2 */
6110 TPACPI_Q_IBM('1', 'U', TPACPI_BRGHT_Q_NOEC),
6111 TPACPI_Q_IBM('1', 'V', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
6112 TPACPI_Q_IBM('1', 'W', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
6113
6114 /* Models with Intel GMA900 */
6115 TPACPI_Q_IBM('7', '0', TPACPI_BRGHT_Q_NOEC), /* T43, R52 */
6116 TPACPI_Q_IBM('7', '4', TPACPI_BRGHT_Q_NOEC), /* X41 */
6117 TPACPI_Q_IBM('7', '5', TPACPI_BRGHT_Q_NOEC), /* X41 Tablet */
6118 };
6119
6120 static int __init brightness_init(struct ibm_init_struct *iibm)
6121 {
6122 int b;
6123 unsigned long quirks;
6124
6125 vdbg_printk(TPACPI_DBG_INIT, "initializing brightness subdriver\n");
6126
6127 mutex_init(&brightness_mutex);
6128
6129 quirks = tpacpi_check_quirks(brightness_quirk_table,
6130 ARRAY_SIZE(brightness_quirk_table));
6131
6132 /*
6133 * We always attempt to detect acpi support, so as to switch
6134 * Lenovo Vista BIOS to ACPI brightness mode even if we are not
6135 * going to publish a backlight interface
6136 */
6137 b = tpacpi_check_std_acpi_brightness_support();
6138 if (b > 0) {
6139
6140 if (acpi_video_backlight_support()) {
6141 if (brightness_enable > 1) {
6142 printk(TPACPI_NOTICE
6143 "Standard ACPI backlight interface "
6144 "available, not loading native one.\n");
6145 return 1;
6146 } else if (brightness_enable == 1) {
6147 printk(TPACPI_NOTICE
6148 "Backlight control force enabled, even if standard "
6149 "ACPI backlight interface is available\n");
6150 }
6151 } else {
6152 if (brightness_enable > 1) {
6153 printk(TPACPI_NOTICE
6154 "Standard ACPI backlight interface not "
6155 "available, thinkpad_acpi native "
6156 "brightness control enabled\n");
6157 }
6158 }
6159 }
6160
6161 if (!brightness_enable) {
6162 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT,
6163 "brightness support disabled by "
6164 "module parameter\n");
6165 return 1;
6166 }
6167
6168 if (b > 16) {
6169 printk(TPACPI_ERR
6170 "Unsupported brightness interface, "
6171 "please contact %s\n", TPACPI_MAIL);
6172 return 1;
6173 }
6174 if (b == 16)
6175 tp_features.bright_16levels = 1;
6176
6177 /*
6178 * Check for module parameter bogosity, note that we
6179 * init brightness_mode to TPACPI_BRGHT_MODE_MAX in order to be
6180 * able to detect "unspecified"
6181 */
6182 if (brightness_mode > TPACPI_BRGHT_MODE_MAX)
6183 return -EINVAL;
6184
6185 /* TPACPI_BRGHT_MODE_AUTO not implemented yet, just use default */
6186 if (brightness_mode == TPACPI_BRGHT_MODE_AUTO ||
6187 brightness_mode == TPACPI_BRGHT_MODE_MAX) {
6188 if (quirks & TPACPI_BRGHT_Q_EC)
6189 brightness_mode = TPACPI_BRGHT_MODE_ECNVRAM;
6190 else
6191 brightness_mode = TPACPI_BRGHT_MODE_UCMS_STEP;
6192
6193 dbg_printk(TPACPI_DBG_BRGHT,
6194 "driver auto-selected brightness_mode=%d\n",
6195 brightness_mode);
6196 }
6197
6198 /* Safety */
6199 if (thinkpad_id.vendor != PCI_VENDOR_ID_IBM &&
6200 (brightness_mode == TPACPI_BRGHT_MODE_ECNVRAM ||
6201 brightness_mode == TPACPI_BRGHT_MODE_EC))
6202 return -EINVAL;
6203
6204 if (tpacpi_brightness_get_raw(&b) < 0)
6205 return 1;
6206
6207 if (tp_features.bright_16levels)
6208 printk(TPACPI_INFO
6209 "detected a 16-level brightness capable ThinkPad\n");
6210
6211 ibm_backlight_device = backlight_device_register(
6212 TPACPI_BACKLIGHT_DEV_NAME, NULL, NULL,
6213 &ibm_backlight_data);
6214 if (IS_ERR(ibm_backlight_device)) {
6215 int rc = PTR_ERR(ibm_backlight_device);
6216 ibm_backlight_device = NULL;
6217 printk(TPACPI_ERR "Could not register backlight device\n");
6218 return rc;
6219 }
6220 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT,
6221 "brightness is supported\n");
6222
6223 if (quirks & TPACPI_BRGHT_Q_ASK) {
6224 printk(TPACPI_NOTICE
6225 "brightness: will use unverified default: "
6226 "brightness_mode=%d\n", brightness_mode);
6227 printk(TPACPI_NOTICE
6228 "brightness: please report to %s whether it works well "
6229 "or not on your ThinkPad\n", TPACPI_MAIL);
6230 }
6231
6232 ibm_backlight_device->props.max_brightness =
6233 (tp_features.bright_16levels)? 15 : 7;
6234 ibm_backlight_device->props.brightness = b & TP_EC_BACKLIGHT_LVLMSK;
6235 backlight_update_status(ibm_backlight_device);
6236
6237 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT,
6238 "brightness: registering brightness hotkeys "
6239 "as change notification\n");
6240 tpacpi_hotkey_driver_mask_set(hotkey_driver_mask
6241 | TP_ACPI_HKEY_BRGHTUP_MASK
6242 | TP_ACPI_HKEY_BRGHTDWN_MASK);;
6243 return 0;
6244 }
6245
6246 static void brightness_suspend(pm_message_t state)
6247 {
6248 tpacpi_brightness_checkpoint_nvram();
6249 }
6250
6251 static void brightness_shutdown(void)
6252 {
6253 tpacpi_brightness_checkpoint_nvram();
6254 }
6255
6256 static void brightness_exit(void)
6257 {
6258 if (ibm_backlight_device) {
6259 vdbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_BRGHT,
6260 "calling backlight_device_unregister()\n");
6261 backlight_device_unregister(ibm_backlight_device);
6262 }
6263
6264 tpacpi_brightness_checkpoint_nvram();
6265 }
6266
6267 static int brightness_read(char *p)
6268 {
6269 int len = 0;
6270 int level;
6271
6272 level = brightness_get(NULL);
6273 if (level < 0) {
6274 len += sprintf(p + len, "level:\t\tunreadable\n");
6275 } else {
6276 len += sprintf(p + len, "level:\t\t%d\n", level);
6277 len += sprintf(p + len, "commands:\tup, down\n");
6278 len += sprintf(p + len, "commands:\tlevel <level>"
6279 " (<level> is 0-%d)\n",
6280 (tp_features.bright_16levels) ? 15 : 7);
6281 }
6282
6283 return len;
6284 }
6285
6286 static int brightness_write(char *buf)
6287 {
6288 int level;
6289 int rc;
6290 char *cmd;
6291 int max_level = (tp_features.bright_16levels) ? 15 : 7;
6292
6293 level = brightness_get(NULL);
6294 if (level < 0)
6295 return level;
6296
6297 while ((cmd = next_cmd(&buf))) {
6298 if (strlencmp(cmd, "up") == 0) {
6299 if (level < max_level)
6300 level++;
6301 } else if (strlencmp(cmd, "down") == 0) {
6302 if (level > 0)
6303 level--;
6304 } else if (sscanf(cmd, "level %d", &level) == 1 &&
6305 level >= 0 && level <= max_level) {
6306 /* new level set */
6307 } else
6308 return -EINVAL;
6309 }
6310
6311 tpacpi_disclose_usertask("procfs brightness",
6312 "set level to %d\n", level);
6313
6314 /*
6315 * Now we know what the final level should be, so we try to set it.
6316 * Doing it this way makes the syscall restartable in case of EINTR
6317 */
6318 rc = brightness_set(level);
6319 if (!rc && ibm_backlight_device)
6320 backlight_force_update(ibm_backlight_device,
6321 BACKLIGHT_UPDATE_SYSFS);
6322 return (rc == -EINTR)? -ERESTARTSYS : rc;
6323 }
6324
6325 static struct ibm_struct brightness_driver_data = {
6326 .name = "brightness",
6327 .read = brightness_read,
6328 .write = brightness_write,
6329 .exit = brightness_exit,
6330 .suspend = brightness_suspend,
6331 .shutdown = brightness_shutdown,
6332 };
6333
6334 /*************************************************************************
6335 * Volume subdriver
6336 */
6337
6338 static int volume_offset = 0x30;
6339
6340 static int volume_read(char *p)
6341 {
6342 int len = 0;
6343 u8 level;
6344
6345 if (!acpi_ec_read(volume_offset, &level)) {
6346 len += sprintf(p + len, "level:\t\tunreadable\n");
6347 } else {
6348 len += sprintf(p + len, "level:\t\t%d\n", level & 0xf);
6349 len += sprintf(p + len, "mute:\t\t%s\n", onoff(level, 6));
6350 len += sprintf(p + len, "commands:\tup, down, mute\n");
6351 len += sprintf(p + len, "commands:\tlevel <level>"
6352 " (<level> is 0-15)\n");
6353 }
6354
6355 return len;
6356 }
6357
6358 static int volume_write(char *buf)
6359 {
6360 int cmos_cmd, inc, i;
6361 u8 level, mute;
6362 int new_level, new_mute;
6363 char *cmd;
6364
6365 while ((cmd = next_cmd(&buf))) {
6366 if (!acpi_ec_read(volume_offset, &level))
6367 return -EIO;
6368 new_mute = mute = level & 0x40;
6369 new_level = level = level & 0xf;
6370
6371 if (strlencmp(cmd, "up") == 0) {
6372 if (mute)
6373 new_mute = 0;
6374 else
6375 new_level = level == 15 ? 15 : level + 1;
6376 } else if (strlencmp(cmd, "down") == 0) {
6377 if (mute)
6378 new_mute = 0;
6379 else
6380 new_level = level == 0 ? 0 : level - 1;
6381 } else if (sscanf(cmd, "level %d", &new_level) == 1 &&
6382 new_level >= 0 && new_level <= 15) {
6383 /* new_level set */
6384 } else if (strlencmp(cmd, "mute") == 0) {
6385 new_mute = 0x40;
6386 } else
6387 return -EINVAL;
6388
6389 if (new_level != level) {
6390 /* mute doesn't change */
6391
6392 cmos_cmd = (new_level > level) ?
6393 TP_CMOS_VOLUME_UP : TP_CMOS_VOLUME_DOWN;
6394 inc = new_level > level ? 1 : -1;
6395
6396 if (mute && (issue_thinkpad_cmos_command(cmos_cmd) ||
6397 !acpi_ec_write(volume_offset, level)))
6398 return -EIO;
6399
6400 for (i = level; i != new_level; i += inc)
6401 if (issue_thinkpad_cmos_command(cmos_cmd) ||
6402 !acpi_ec_write(volume_offset, i + inc))
6403 return -EIO;
6404
6405 if (mute &&
6406 (issue_thinkpad_cmos_command(TP_CMOS_VOLUME_MUTE) ||
6407 !acpi_ec_write(volume_offset, new_level + mute))) {
6408 return -EIO;
6409 }
6410 }
6411
6412 if (new_mute != mute) {
6413 /* level doesn't change */
6414
6415 cmos_cmd = (new_mute) ?
6416 TP_CMOS_VOLUME_MUTE : TP_CMOS_VOLUME_UP;
6417
6418 if (issue_thinkpad_cmos_command(cmos_cmd) ||
6419 !acpi_ec_write(volume_offset, level + new_mute))
6420 return -EIO;
6421 }
6422 }
6423
6424 return 0;
6425 }
6426
6427 static struct ibm_struct volume_driver_data = {
6428 .name = "volume",
6429 .read = volume_read,
6430 .write = volume_write,
6431 };
6432
6433 /*************************************************************************
6434 * Fan subdriver
6435 */
6436
6437 /*
6438 * FAN ACCESS MODES
6439 *
6440 * TPACPI_FAN_RD_ACPI_GFAN:
6441 * ACPI GFAN method: returns fan level
6442 *
6443 * see TPACPI_FAN_WR_ACPI_SFAN
6444 * EC 0x2f (HFSP) not available if GFAN exists
6445 *
6446 * TPACPI_FAN_WR_ACPI_SFAN:
6447 * ACPI SFAN method: sets fan level, 0 (stop) to 7 (max)
6448 *
6449 * EC 0x2f (HFSP) might be available *for reading*, but do not use
6450 * it for writing.
6451 *
6452 * TPACPI_FAN_WR_TPEC:
6453 * ThinkPad EC register 0x2f (HFSP): fan control loop mode
6454 * Supported on almost all ThinkPads
6455 *
6456 * Fan speed changes of any sort (including those caused by the
6457 * disengaged mode) are usually done slowly by the firmware as the
6458 * maximum ammount of fan duty cycle change per second seems to be
6459 * limited.
6460 *
6461 * Reading is not available if GFAN exists.
6462 * Writing is not available if SFAN exists.
6463 *
6464 * Bits
6465 * 7 automatic mode engaged;
6466 * (default operation mode of the ThinkPad)
6467 * fan level is ignored in this mode.
6468 * 6 full speed mode (takes precedence over bit 7);
6469 * not available on all thinkpads. May disable
6470 * the tachometer while the fan controller ramps up
6471 * the speed (which can take up to a few *minutes*).
6472 * Speeds up fan to 100% duty-cycle, which is far above
6473 * the standard RPM levels. It is not impossible that
6474 * it could cause hardware damage.
6475 * 5-3 unused in some models. Extra bits for fan level
6476 * in others, but still useless as all values above
6477 * 7 map to the same speed as level 7 in these models.
6478 * 2-0 fan level (0..7 usually)
6479 * 0x00 = stop
6480 * 0x07 = max (set when temperatures critical)
6481 * Some ThinkPads may have other levels, see
6482 * TPACPI_FAN_WR_ACPI_FANS (X31/X40/X41)
6483 *
6484 * FIRMWARE BUG: on some models, EC 0x2f might not be initialized at
6485 * boot. Apparently the EC does not intialize it, so unless ACPI DSDT
6486 * does so, its initial value is meaningless (0x07).
6487 *
6488 * For firmware bugs, refer to:
6489 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
6490 *
6491 * ----
6492 *
6493 * ThinkPad EC register 0x84 (LSB), 0x85 (MSB):
6494 * Main fan tachometer reading (in RPM)
6495 *
6496 * This register is present on all ThinkPads with a new-style EC, and
6497 * it is known not to be present on the A21m/e, and T22, as there is
6498 * something else in offset 0x84 according to the ACPI DSDT. Other
6499 * ThinkPads from this same time period (and earlier) probably lack the
6500 * tachometer as well.
6501 *
6502 * Unfortunately a lot of ThinkPads with new-style ECs but whose firmware
6503 * was never fixed by IBM to report the EC firmware version string
6504 * probably support the tachometer (like the early X models), so
6505 * detecting it is quite hard. We need more data to know for sure.
6506 *
6507 * FIRMWARE BUG: always read 0x84 first, otherwise incorrect readings
6508 * might result.
6509 *
6510 * FIRMWARE BUG: may go stale while the EC is switching to full speed
6511 * mode.
6512 *
6513 * For firmware bugs, refer to:
6514 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
6515 *
6516 * ----
6517 *
6518 * ThinkPad EC register 0x31 bit 0 (only on select models)
6519 *
6520 * When bit 0 of EC register 0x31 is zero, the tachometer registers
6521 * show the speed of the main fan. When bit 0 of EC register 0x31
6522 * is one, the tachometer registers show the speed of the auxiliary
6523 * fan.
6524 *
6525 * Fan control seems to affect both fans, regardless of the state
6526 * of this bit.
6527 *
6528 * So far, only the firmware for the X60/X61 non-tablet versions
6529 * seem to support this (firmware TP-7M).
6530 *
6531 * TPACPI_FAN_WR_ACPI_FANS:
6532 * ThinkPad X31, X40, X41. Not available in the X60.
6533 *
6534 * FANS ACPI handle: takes three arguments: low speed, medium speed,
6535 * high speed. ACPI DSDT seems to map these three speeds to levels
6536 * as follows: STOP LOW LOW MED MED HIGH HIGH HIGH HIGH
6537 * (this map is stored on FAN0..FAN8 as "0,1,1,2,2,3,3,3,3")
6538 *
6539 * The speeds are stored on handles
6540 * (FANA:FAN9), (FANC:FANB), (FANE:FAND).
6541 *
6542 * There are three default speed sets, acessible as handles:
6543 * FS1L,FS1M,FS1H; FS2L,FS2M,FS2H; FS3L,FS3M,FS3H
6544 *
6545 * ACPI DSDT switches which set is in use depending on various
6546 * factors.
6547 *
6548 * TPACPI_FAN_WR_TPEC is also available and should be used to
6549 * command the fan. The X31/X40/X41 seems to have 8 fan levels,
6550 * but the ACPI tables just mention level 7.
6551 */
6552
6553 enum { /* Fan control constants */
6554 fan_status_offset = 0x2f, /* EC register 0x2f */
6555 fan_rpm_offset = 0x84, /* EC register 0x84: LSB, 0x85 MSB (RPM)
6556 * 0x84 must be read before 0x85 */
6557 fan_select_offset = 0x31, /* EC register 0x31 (Firmware 7M)
6558 bit 0 selects which fan is active */
6559
6560 TP_EC_FAN_FULLSPEED = 0x40, /* EC fan mode: full speed */
6561 TP_EC_FAN_AUTO = 0x80, /* EC fan mode: auto fan control */
6562
6563 TPACPI_FAN_LAST_LEVEL = 0x100, /* Use cached last-seen fan level */
6564 };
6565
6566 enum fan_status_access_mode {
6567 TPACPI_FAN_NONE = 0, /* No fan status or control */
6568 TPACPI_FAN_RD_ACPI_GFAN, /* Use ACPI GFAN */
6569 TPACPI_FAN_RD_TPEC, /* Use ACPI EC regs 0x2f, 0x84-0x85 */
6570 };
6571
6572 enum fan_control_access_mode {
6573 TPACPI_FAN_WR_NONE = 0, /* No fan control */
6574 TPACPI_FAN_WR_ACPI_SFAN, /* Use ACPI SFAN */
6575 TPACPI_FAN_WR_TPEC, /* Use ACPI EC reg 0x2f */
6576 TPACPI_FAN_WR_ACPI_FANS, /* Use ACPI FANS and EC reg 0x2f */
6577 };
6578
6579 enum fan_control_commands {
6580 TPACPI_FAN_CMD_SPEED = 0x0001, /* speed command */
6581 TPACPI_FAN_CMD_LEVEL = 0x0002, /* level command */
6582 TPACPI_FAN_CMD_ENABLE = 0x0004, /* enable/disable cmd,
6583 * and also watchdog cmd */
6584 };
6585
6586 static int fan_control_allowed;
6587
6588 static enum fan_status_access_mode fan_status_access_mode;
6589 static enum fan_control_access_mode fan_control_access_mode;
6590 static enum fan_control_commands fan_control_commands;
6591
6592 static u8 fan_control_initial_status;
6593 static u8 fan_control_desired_level;
6594 static u8 fan_control_resume_level;
6595 static int fan_watchdog_maxinterval;
6596
6597 static struct mutex fan_mutex;
6598
6599 static void fan_watchdog_fire(struct work_struct *ignored);
6600 static DECLARE_DELAYED_WORK(fan_watchdog_task, fan_watchdog_fire);
6601
6602 TPACPI_HANDLE(fans, ec, "FANS"); /* X31, X40, X41 */
6603 TPACPI_HANDLE(gfan, ec, "GFAN", /* 570 */
6604 "\\FSPD", /* 600e/x, 770e, 770x */
6605 ); /* all others */
6606 TPACPI_HANDLE(sfan, ec, "SFAN", /* 570 */
6607 "JFNS", /* 770x-JL */
6608 ); /* all others */
6609
6610 /*
6611 * Unitialized HFSP quirk: ACPI DSDT and EC fail to initialize the
6612 * HFSP register at boot, so it contains 0x07 but the Thinkpad could
6613 * be in auto mode (0x80).
6614 *
6615 * This is corrected by any write to HFSP either by the driver, or
6616 * by the firmware.
6617 *
6618 * We assume 0x07 really means auto mode while this quirk is active,
6619 * as this is far more likely than the ThinkPad being in level 7,
6620 * which is only used by the firmware during thermal emergencies.
6621 *
6622 * Enable for TP-1Y (T43), TP-78 (R51e), TP-76 (R52),
6623 * TP-70 (T43, R52), which are known to be buggy.
6624 */
6625
6626 static void fan_quirk1_setup(void)
6627 {
6628 if (fan_control_initial_status == 0x07) {
6629 printk(TPACPI_NOTICE
6630 "fan_init: initial fan status is unknown, "
6631 "assuming it is in auto mode\n");
6632 tp_features.fan_ctrl_status_undef = 1;
6633 }
6634 }
6635
6636 static void fan_quirk1_handle(u8 *fan_status)
6637 {
6638 if (unlikely(tp_features.fan_ctrl_status_undef)) {
6639 if (*fan_status != fan_control_initial_status) {
6640 /* something changed the HFSP regisnter since
6641 * driver init time, so it is not undefined
6642 * anymore */
6643 tp_features.fan_ctrl_status_undef = 0;
6644 } else {
6645 /* Return most likely status. In fact, it
6646 * might be the only possible status */
6647 *fan_status = TP_EC_FAN_AUTO;
6648 }
6649 }
6650 }
6651
6652 /* Select main fan on X60/X61, NOOP on others */
6653 static bool fan_select_fan1(void)
6654 {
6655 if (tp_features.second_fan) {
6656 u8 val;
6657
6658 if (ec_read(fan_select_offset, &val) < 0)
6659 return false;
6660 val &= 0xFEU;
6661 if (ec_write(fan_select_offset, val) < 0)
6662 return false;
6663 }
6664 return true;
6665 }
6666
6667 /* Select secondary fan on X60/X61 */
6668 static bool fan_select_fan2(void)
6669 {
6670 u8 val;
6671
6672 if (!tp_features.second_fan)
6673 return false;
6674
6675 if (ec_read(fan_select_offset, &val) < 0)
6676 return false;
6677 val |= 0x01U;
6678 if (ec_write(fan_select_offset, val) < 0)
6679 return false;
6680
6681 return true;
6682 }
6683
6684 /*
6685 * Call with fan_mutex held
6686 */
6687 static void fan_update_desired_level(u8 status)
6688 {
6689 if ((status &
6690 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
6691 if (status > 7)
6692 fan_control_desired_level = 7;
6693 else
6694 fan_control_desired_level = status;
6695 }
6696 }
6697
6698 static int fan_get_status(u8 *status)
6699 {
6700 u8 s;
6701
6702 /* TODO:
6703 * Add TPACPI_FAN_RD_ACPI_FANS ? */
6704
6705 switch (fan_status_access_mode) {
6706 case TPACPI_FAN_RD_ACPI_GFAN:
6707 /* 570, 600e/x, 770e, 770x */
6708
6709 if (unlikely(!acpi_evalf(gfan_handle, &s, NULL, "d")))
6710 return -EIO;
6711
6712 if (likely(status))
6713 *status = s & 0x07;
6714
6715 break;
6716
6717 case TPACPI_FAN_RD_TPEC:
6718 /* all except 570, 600e/x, 770e, 770x */
6719 if (unlikely(!acpi_ec_read(fan_status_offset, &s)))
6720 return -EIO;
6721
6722 if (likely(status)) {
6723 *status = s;
6724 fan_quirk1_handle(status);
6725 }
6726
6727 break;
6728
6729 default:
6730 return -ENXIO;
6731 }
6732
6733 return 0;
6734 }
6735
6736 static int fan_get_status_safe(u8 *status)
6737 {
6738 int rc;
6739 u8 s;
6740
6741 if (mutex_lock_killable(&fan_mutex))
6742 return -ERESTARTSYS;
6743 rc = fan_get_status(&s);
6744 if (!rc)
6745 fan_update_desired_level(s);
6746 mutex_unlock(&fan_mutex);
6747
6748 if (status)
6749 *status = s;
6750
6751 return rc;
6752 }
6753
6754 static int fan_get_speed(unsigned int *speed)
6755 {
6756 u8 hi, lo;
6757
6758 switch (fan_status_access_mode) {
6759 case TPACPI_FAN_RD_TPEC:
6760 /* all except 570, 600e/x, 770e, 770x */
6761 if (unlikely(!fan_select_fan1()))
6762 return -EIO;
6763 if (unlikely(!acpi_ec_read(fan_rpm_offset, &lo) ||
6764 !acpi_ec_read(fan_rpm_offset + 1, &hi)))
6765 return -EIO;
6766
6767 if (likely(speed))
6768 *speed = (hi << 8) | lo;
6769
6770 break;
6771
6772 default:
6773 return -ENXIO;
6774 }
6775
6776 return 0;
6777 }
6778
6779 static int fan2_get_speed(unsigned int *speed)
6780 {
6781 u8 hi, lo;
6782 bool rc;
6783
6784 switch (fan_status_access_mode) {
6785 case TPACPI_FAN_RD_TPEC:
6786 /* all except 570, 600e/x, 770e, 770x */
6787 if (unlikely(!fan_select_fan2()))
6788 return -EIO;
6789 rc = !acpi_ec_read(fan_rpm_offset, &lo) ||
6790 !acpi_ec_read(fan_rpm_offset + 1, &hi);
6791 fan_select_fan1(); /* play it safe */
6792 if (rc)
6793 return -EIO;
6794
6795 if (likely(speed))
6796 *speed = (hi << 8) | lo;
6797
6798 break;
6799
6800 default:
6801 return -ENXIO;
6802 }
6803
6804 return 0;
6805 }
6806
6807 static int fan_set_level(int level)
6808 {
6809 if (!fan_control_allowed)
6810 return -EPERM;
6811
6812 switch (fan_control_access_mode) {
6813 case TPACPI_FAN_WR_ACPI_SFAN:
6814 if (level >= 0 && level <= 7) {
6815 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", level))
6816 return -EIO;
6817 } else
6818 return -EINVAL;
6819 break;
6820
6821 case TPACPI_FAN_WR_ACPI_FANS:
6822 case TPACPI_FAN_WR_TPEC:
6823 if (!(level & TP_EC_FAN_AUTO) &&
6824 !(level & TP_EC_FAN_FULLSPEED) &&
6825 ((level < 0) || (level > 7)))
6826 return -EINVAL;
6827
6828 /* safety net should the EC not support AUTO
6829 * or FULLSPEED mode bits and just ignore them */
6830 if (level & TP_EC_FAN_FULLSPEED)
6831 level |= 7; /* safety min speed 7 */
6832 else if (level & TP_EC_FAN_AUTO)
6833 level |= 4; /* safety min speed 4 */
6834
6835 if (!acpi_ec_write(fan_status_offset, level))
6836 return -EIO;
6837 else
6838 tp_features.fan_ctrl_status_undef = 0;
6839 break;
6840
6841 default:
6842 return -ENXIO;
6843 }
6844
6845 vdbg_printk(TPACPI_DBG_FAN,
6846 "fan control: set fan control register to 0x%02x\n", level);
6847 return 0;
6848 }
6849
6850 static int fan_set_level_safe(int level)
6851 {
6852 int rc;
6853
6854 if (!fan_control_allowed)
6855 return -EPERM;
6856
6857 if (mutex_lock_killable(&fan_mutex))
6858 return -ERESTARTSYS;
6859
6860 if (level == TPACPI_FAN_LAST_LEVEL)
6861 level = fan_control_desired_level;
6862
6863 rc = fan_set_level(level);
6864 if (!rc)
6865 fan_update_desired_level(level);
6866
6867 mutex_unlock(&fan_mutex);
6868 return rc;
6869 }
6870
6871 static int fan_set_enable(void)
6872 {
6873 u8 s;
6874 int rc;
6875
6876 if (!fan_control_allowed)
6877 return -EPERM;
6878
6879 if (mutex_lock_killable(&fan_mutex))
6880 return -ERESTARTSYS;
6881
6882 switch (fan_control_access_mode) {
6883 case TPACPI_FAN_WR_ACPI_FANS:
6884 case TPACPI_FAN_WR_TPEC:
6885 rc = fan_get_status(&s);
6886 if (rc < 0)
6887 break;
6888
6889 /* Don't go out of emergency fan mode */
6890 if (s != 7) {
6891 s &= 0x07;
6892 s |= TP_EC_FAN_AUTO | 4; /* min fan speed 4 */
6893 }
6894
6895 if (!acpi_ec_write(fan_status_offset, s))
6896 rc = -EIO;
6897 else {
6898 tp_features.fan_ctrl_status_undef = 0;
6899 rc = 0;
6900 }
6901 break;
6902
6903 case TPACPI_FAN_WR_ACPI_SFAN:
6904 rc = fan_get_status(&s);
6905 if (rc < 0)
6906 break;
6907
6908 s &= 0x07;
6909
6910 /* Set fan to at least level 4 */
6911 s |= 4;
6912
6913 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", s))
6914 rc = -EIO;
6915 else
6916 rc = 0;
6917 break;
6918
6919 default:
6920 rc = -ENXIO;
6921 }
6922
6923 mutex_unlock(&fan_mutex);
6924
6925 if (!rc)
6926 vdbg_printk(TPACPI_DBG_FAN,
6927 "fan control: set fan control register to 0x%02x\n",
6928 s);
6929 return rc;
6930 }
6931
6932 static int fan_set_disable(void)
6933 {
6934 int rc;
6935
6936 if (!fan_control_allowed)
6937 return -EPERM;
6938
6939 if (mutex_lock_killable(&fan_mutex))
6940 return -ERESTARTSYS;
6941
6942 rc = 0;
6943 switch (fan_control_access_mode) {
6944 case TPACPI_FAN_WR_ACPI_FANS:
6945 case TPACPI_FAN_WR_TPEC:
6946 if (!acpi_ec_write(fan_status_offset, 0x00))
6947 rc = -EIO;
6948 else {
6949 fan_control_desired_level = 0;
6950 tp_features.fan_ctrl_status_undef = 0;
6951 }
6952 break;
6953
6954 case TPACPI_FAN_WR_ACPI_SFAN:
6955 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", 0x00))
6956 rc = -EIO;
6957 else
6958 fan_control_desired_level = 0;
6959 break;
6960
6961 default:
6962 rc = -ENXIO;
6963 }
6964
6965 if (!rc)
6966 vdbg_printk(TPACPI_DBG_FAN,
6967 "fan control: set fan control register to 0\n");
6968
6969 mutex_unlock(&fan_mutex);
6970 return rc;
6971 }
6972
6973 static int fan_set_speed(int speed)
6974 {
6975 int rc;
6976
6977 if (!fan_control_allowed)
6978 return -EPERM;
6979
6980 if (mutex_lock_killable(&fan_mutex))
6981 return -ERESTARTSYS;
6982
6983 rc = 0;
6984 switch (fan_control_access_mode) {
6985 case TPACPI_FAN_WR_ACPI_FANS:
6986 if (speed >= 0 && speed <= 65535) {
6987 if (!acpi_evalf(fans_handle, NULL, NULL, "vddd",
6988 speed, speed, speed))
6989 rc = -EIO;
6990 } else
6991 rc = -EINVAL;
6992 break;
6993
6994 default:
6995 rc = -ENXIO;
6996 }
6997
6998 mutex_unlock(&fan_mutex);
6999 return rc;
7000 }
7001
7002 static void fan_watchdog_reset(void)
7003 {
7004 static int fan_watchdog_active;
7005
7006 if (fan_control_access_mode == TPACPI_FAN_WR_NONE)
7007 return;
7008
7009 if (fan_watchdog_active)
7010 cancel_delayed_work(&fan_watchdog_task);
7011
7012 if (fan_watchdog_maxinterval > 0 &&
7013 tpacpi_lifecycle != TPACPI_LIFE_EXITING) {
7014 fan_watchdog_active = 1;
7015 if (!queue_delayed_work(tpacpi_wq, &fan_watchdog_task,
7016 msecs_to_jiffies(fan_watchdog_maxinterval
7017 * 1000))) {
7018 printk(TPACPI_ERR
7019 "failed to queue the fan watchdog, "
7020 "watchdog will not trigger\n");
7021 }
7022 } else
7023 fan_watchdog_active = 0;
7024 }
7025
7026 static void fan_watchdog_fire(struct work_struct *ignored)
7027 {
7028 int rc;
7029
7030 if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
7031 return;
7032
7033 printk(TPACPI_NOTICE "fan watchdog: enabling fan\n");
7034 rc = fan_set_enable();
7035 if (rc < 0) {
7036 printk(TPACPI_ERR "fan watchdog: error %d while enabling fan, "
7037 "will try again later...\n", -rc);
7038 /* reschedule for later */
7039 fan_watchdog_reset();
7040 }
7041 }
7042
7043 /*
7044 * SYSFS fan layout: hwmon compatible (device)
7045 *
7046 * pwm*_enable:
7047 * 0: "disengaged" mode
7048 * 1: manual mode
7049 * 2: native EC "auto" mode (recommended, hardware default)
7050 *
7051 * pwm*: set speed in manual mode, ignored otherwise.
7052 * 0 is level 0; 255 is level 7. Intermediate points done with linear
7053 * interpolation.
7054 *
7055 * fan*_input: tachometer reading, RPM
7056 *
7057 *
7058 * SYSFS fan layout: extensions
7059 *
7060 * fan_watchdog (driver):
7061 * fan watchdog interval in seconds, 0 disables (default), max 120
7062 */
7063
7064 /* sysfs fan pwm1_enable ----------------------------------------------- */
7065 static ssize_t fan_pwm1_enable_show(struct device *dev,
7066 struct device_attribute *attr,
7067 char *buf)
7068 {
7069 int res, mode;
7070 u8 status;
7071
7072 res = fan_get_status_safe(&status);
7073 if (res)
7074 return res;
7075
7076 if (status & TP_EC_FAN_FULLSPEED) {
7077 mode = 0;
7078 } else if (status & TP_EC_FAN_AUTO) {
7079 mode = 2;
7080 } else
7081 mode = 1;
7082
7083 return snprintf(buf, PAGE_SIZE, "%d\n", mode);
7084 }
7085
7086 static ssize_t fan_pwm1_enable_store(struct device *dev,
7087 struct device_attribute *attr,
7088 const char *buf, size_t count)
7089 {
7090 unsigned long t;
7091 int res, level;
7092
7093 if (parse_strtoul(buf, 2, &t))
7094 return -EINVAL;
7095
7096 tpacpi_disclose_usertask("hwmon pwm1_enable",
7097 "set fan mode to %lu\n", t);
7098
7099 switch (t) {
7100 case 0:
7101 level = TP_EC_FAN_FULLSPEED;
7102 break;
7103 case 1:
7104 level = TPACPI_FAN_LAST_LEVEL;
7105 break;
7106 case 2:
7107 level = TP_EC_FAN_AUTO;
7108 break;
7109 case 3:
7110 /* reserved for software-controlled auto mode */
7111 return -ENOSYS;
7112 default:
7113 return -EINVAL;
7114 }
7115
7116 res = fan_set_level_safe(level);
7117 if (res == -ENXIO)
7118 return -EINVAL;
7119 else if (res < 0)
7120 return res;
7121
7122 fan_watchdog_reset();
7123
7124 return count;
7125 }
7126
7127 static struct device_attribute dev_attr_fan_pwm1_enable =
7128 __ATTR(pwm1_enable, S_IWUSR | S_IRUGO,
7129 fan_pwm1_enable_show, fan_pwm1_enable_store);
7130
7131 /* sysfs fan pwm1 ------------------------------------------------------ */
7132 static ssize_t fan_pwm1_show(struct device *dev,
7133 struct device_attribute *attr,
7134 char *buf)
7135 {
7136 int res;
7137 u8 status;
7138
7139 res = fan_get_status_safe(&status);
7140 if (res)
7141 return res;
7142
7143 if ((status &
7144 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) != 0)
7145 status = fan_control_desired_level;
7146
7147 if (status > 7)
7148 status = 7;
7149
7150 return snprintf(buf, PAGE_SIZE, "%u\n", (status * 255) / 7);
7151 }
7152
7153 static ssize_t fan_pwm1_store(struct device *dev,
7154 struct device_attribute *attr,
7155 const char *buf, size_t count)
7156 {
7157 unsigned long s;
7158 int rc;
7159 u8 status, newlevel;
7160
7161 if (parse_strtoul(buf, 255, &s))
7162 return -EINVAL;
7163
7164 tpacpi_disclose_usertask("hwmon pwm1",
7165 "set fan speed to %lu\n", s);
7166
7167 /* scale down from 0-255 to 0-7 */
7168 newlevel = (s >> 5) & 0x07;
7169
7170 if (mutex_lock_killable(&fan_mutex))
7171 return -ERESTARTSYS;
7172
7173 rc = fan_get_status(&status);
7174 if (!rc && (status &
7175 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
7176 rc = fan_set_level(newlevel);
7177 if (rc == -ENXIO)
7178 rc = -EINVAL;
7179 else if (!rc) {
7180 fan_update_desired_level(newlevel);
7181 fan_watchdog_reset();
7182 }
7183 }
7184
7185 mutex_unlock(&fan_mutex);
7186 return (rc)? rc : count;
7187 }
7188
7189 static struct device_attribute dev_attr_fan_pwm1 =
7190 __ATTR(pwm1, S_IWUSR | S_IRUGO,
7191 fan_pwm1_show, fan_pwm1_store);
7192
7193 /* sysfs fan fan1_input ------------------------------------------------ */
7194 static ssize_t fan_fan1_input_show(struct device *dev,
7195 struct device_attribute *attr,
7196 char *buf)
7197 {
7198 int res;
7199 unsigned int speed;
7200
7201 res = fan_get_speed(&speed);
7202 if (res < 0)
7203 return res;
7204
7205 return snprintf(buf, PAGE_SIZE, "%u\n", speed);
7206 }
7207
7208 static struct device_attribute dev_attr_fan_fan1_input =
7209 __ATTR(fan1_input, S_IRUGO,
7210 fan_fan1_input_show, NULL);
7211
7212 /* sysfs fan fan2_input ------------------------------------------------ */
7213 static ssize_t fan_fan2_input_show(struct device *dev,
7214 struct device_attribute *attr,
7215 char *buf)
7216 {
7217 int res;
7218 unsigned int speed;
7219
7220 res = fan2_get_speed(&speed);
7221 if (res < 0)
7222 return res;
7223
7224 return snprintf(buf, PAGE_SIZE, "%u\n", speed);
7225 }
7226
7227 static struct device_attribute dev_attr_fan_fan2_input =
7228 __ATTR(fan2_input, S_IRUGO,
7229 fan_fan2_input_show, NULL);
7230
7231 /* sysfs fan fan_watchdog (hwmon driver) ------------------------------- */
7232 static ssize_t fan_fan_watchdog_show(struct device_driver *drv,
7233 char *buf)
7234 {
7235 return snprintf(buf, PAGE_SIZE, "%u\n", fan_watchdog_maxinterval);
7236 }
7237
7238 static ssize_t fan_fan_watchdog_store(struct device_driver *drv,
7239 const char *buf, size_t count)
7240 {
7241 unsigned long t;
7242
7243 if (parse_strtoul(buf, 120, &t))
7244 return -EINVAL;
7245
7246 if (!fan_control_allowed)
7247 return -EPERM;
7248
7249 fan_watchdog_maxinterval = t;
7250 fan_watchdog_reset();
7251
7252 tpacpi_disclose_usertask("fan_watchdog", "set to %lu\n", t);
7253
7254 return count;
7255 }
7256
7257 static DRIVER_ATTR(fan_watchdog, S_IWUSR | S_IRUGO,
7258 fan_fan_watchdog_show, fan_fan_watchdog_store);
7259
7260 /* --------------------------------------------------------------------- */
7261 static struct attribute *fan_attributes[] = {
7262 &dev_attr_fan_pwm1_enable.attr, &dev_attr_fan_pwm1.attr,
7263 &dev_attr_fan_fan1_input.attr,
7264 NULL, /* for fan2_input */
7265 NULL
7266 };
7267
7268 static const struct attribute_group fan_attr_group = {
7269 .attrs = fan_attributes,
7270 };
7271
7272 #define TPACPI_FAN_Q1 0x0001 /* Unitialized HFSP */
7273 #define TPACPI_FAN_2FAN 0x0002 /* EC 0x31 bit 0 selects fan2 */
7274
7275 #define TPACPI_FAN_QI(__id1, __id2, __quirks) \
7276 { .vendor = PCI_VENDOR_ID_IBM, \
7277 .bios = TPACPI_MATCH_ANY, \
7278 .ec = TPID(__id1, __id2), \
7279 .quirks = __quirks }
7280
7281 #define TPACPI_FAN_QL(__id1, __id2, __quirks) \
7282 { .vendor = PCI_VENDOR_ID_LENOVO, \
7283 .bios = TPACPI_MATCH_ANY, \
7284 .ec = TPID(__id1, __id2), \
7285 .quirks = __quirks }
7286
7287 static const struct tpacpi_quirk fan_quirk_table[] __initconst = {
7288 TPACPI_FAN_QI('1', 'Y', TPACPI_FAN_Q1),
7289 TPACPI_FAN_QI('7', '8', TPACPI_FAN_Q1),
7290 TPACPI_FAN_QI('7', '6', TPACPI_FAN_Q1),
7291 TPACPI_FAN_QI('7', '0', TPACPI_FAN_Q1),
7292 TPACPI_FAN_QL('7', 'M', TPACPI_FAN_2FAN),
7293 };
7294
7295 #undef TPACPI_FAN_QL
7296 #undef TPACPI_FAN_QI
7297
7298 static int __init fan_init(struct ibm_init_struct *iibm)
7299 {
7300 int rc;
7301 unsigned long quirks;
7302
7303 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
7304 "initializing fan subdriver\n");
7305
7306 mutex_init(&fan_mutex);
7307 fan_status_access_mode = TPACPI_FAN_NONE;
7308 fan_control_access_mode = TPACPI_FAN_WR_NONE;
7309 fan_control_commands = 0;
7310 fan_watchdog_maxinterval = 0;
7311 tp_features.fan_ctrl_status_undef = 0;
7312 tp_features.second_fan = 0;
7313 fan_control_desired_level = 7;
7314
7315 TPACPI_ACPIHANDLE_INIT(fans);
7316 TPACPI_ACPIHANDLE_INIT(gfan);
7317 TPACPI_ACPIHANDLE_INIT(sfan);
7318
7319 quirks = tpacpi_check_quirks(fan_quirk_table,
7320 ARRAY_SIZE(fan_quirk_table));
7321
7322 if (gfan_handle) {
7323 /* 570, 600e/x, 770e, 770x */
7324 fan_status_access_mode = TPACPI_FAN_RD_ACPI_GFAN;
7325 } else {
7326 /* all other ThinkPads: note that even old-style
7327 * ThinkPad ECs supports the fan control register */
7328 if (likely(acpi_ec_read(fan_status_offset,
7329 &fan_control_initial_status))) {
7330 fan_status_access_mode = TPACPI_FAN_RD_TPEC;
7331 if (quirks & TPACPI_FAN_Q1)
7332 fan_quirk1_setup();
7333 if (quirks & TPACPI_FAN_2FAN) {
7334 tp_features.second_fan = 1;
7335 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
7336 "secondary fan support enabled\n");
7337 }
7338 } else {
7339 printk(TPACPI_ERR
7340 "ThinkPad ACPI EC access misbehaving, "
7341 "fan status and control unavailable\n");
7342 return 1;
7343 }
7344 }
7345
7346 if (sfan_handle) {
7347 /* 570, 770x-JL */
7348 fan_control_access_mode = TPACPI_FAN_WR_ACPI_SFAN;
7349 fan_control_commands |=
7350 TPACPI_FAN_CMD_LEVEL | TPACPI_FAN_CMD_ENABLE;
7351 } else {
7352 if (!gfan_handle) {
7353 /* gfan without sfan means no fan control */
7354 /* all other models implement TP EC 0x2f control */
7355
7356 if (fans_handle) {
7357 /* X31, X40, X41 */
7358 fan_control_access_mode =
7359 TPACPI_FAN_WR_ACPI_FANS;
7360 fan_control_commands |=
7361 TPACPI_FAN_CMD_SPEED |
7362 TPACPI_FAN_CMD_LEVEL |
7363 TPACPI_FAN_CMD_ENABLE;
7364 } else {
7365 fan_control_access_mode = TPACPI_FAN_WR_TPEC;
7366 fan_control_commands |=
7367 TPACPI_FAN_CMD_LEVEL |
7368 TPACPI_FAN_CMD_ENABLE;
7369 }
7370 }
7371 }
7372
7373 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
7374 "fan is %s, modes %d, %d\n",
7375 str_supported(fan_status_access_mode != TPACPI_FAN_NONE ||
7376 fan_control_access_mode != TPACPI_FAN_WR_NONE),
7377 fan_status_access_mode, fan_control_access_mode);
7378
7379 /* fan control master switch */
7380 if (!fan_control_allowed) {
7381 fan_control_access_mode = TPACPI_FAN_WR_NONE;
7382 fan_control_commands = 0;
7383 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
7384 "fan control features disabled by parameter\n");
7385 }
7386
7387 /* update fan_control_desired_level */
7388 if (fan_status_access_mode != TPACPI_FAN_NONE)
7389 fan_get_status_safe(NULL);
7390
7391 if (fan_status_access_mode != TPACPI_FAN_NONE ||
7392 fan_control_access_mode != TPACPI_FAN_WR_NONE) {
7393 if (tp_features.second_fan) {
7394 /* attach second fan tachometer */
7395 fan_attributes[ARRAY_SIZE(fan_attributes)-2] =
7396 &dev_attr_fan_fan2_input.attr;
7397 }
7398 rc = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
7399 &fan_attr_group);
7400 if (rc < 0)
7401 return rc;
7402
7403 rc = driver_create_file(&tpacpi_hwmon_pdriver.driver,
7404 &driver_attr_fan_watchdog);
7405 if (rc < 0) {
7406 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
7407 &fan_attr_group);
7408 return rc;
7409 }
7410 return 0;
7411 } else
7412 return 1;
7413 }
7414
7415 static void fan_exit(void)
7416 {
7417 vdbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_FAN,
7418 "cancelling any pending fan watchdog tasks\n");
7419
7420 /* FIXME: can we really do this unconditionally? */
7421 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj, &fan_attr_group);
7422 driver_remove_file(&tpacpi_hwmon_pdriver.driver,
7423 &driver_attr_fan_watchdog);
7424
7425 cancel_delayed_work(&fan_watchdog_task);
7426 flush_workqueue(tpacpi_wq);
7427 }
7428
7429 static void fan_suspend(pm_message_t state)
7430 {
7431 int rc;
7432
7433 if (!fan_control_allowed)
7434 return;
7435
7436 /* Store fan status in cache */
7437 fan_control_resume_level = 0;
7438 rc = fan_get_status_safe(&fan_control_resume_level);
7439 if (rc < 0)
7440 printk(TPACPI_NOTICE
7441 "failed to read fan level for later "
7442 "restore during resume: %d\n", rc);
7443
7444 /* if it is undefined, don't attempt to restore it.
7445 * KEEP THIS LAST */
7446 if (tp_features.fan_ctrl_status_undef)
7447 fan_control_resume_level = 0;
7448 }
7449
7450 static void fan_resume(void)
7451 {
7452 u8 current_level = 7;
7453 bool do_set = false;
7454 int rc;
7455
7456 /* DSDT *always* updates status on resume */
7457 tp_features.fan_ctrl_status_undef = 0;
7458
7459 if (!fan_control_allowed ||
7460 !fan_control_resume_level ||
7461 (fan_get_status_safe(&current_level) < 0))
7462 return;
7463
7464 switch (fan_control_access_mode) {
7465 case TPACPI_FAN_WR_ACPI_SFAN:
7466 /* never decrease fan level */
7467 do_set = (fan_control_resume_level > current_level);
7468 break;
7469 case TPACPI_FAN_WR_ACPI_FANS:
7470 case TPACPI_FAN_WR_TPEC:
7471 /* never decrease fan level, scale is:
7472 * TP_EC_FAN_FULLSPEED > 7 >= TP_EC_FAN_AUTO
7473 *
7474 * We expect the firmware to set either 7 or AUTO, but we
7475 * handle FULLSPEED out of paranoia.
7476 *
7477 * So, we can safely only restore FULLSPEED or 7, anything
7478 * else could slow the fan. Restoring AUTO is useless, at
7479 * best that's exactly what the DSDT already set (it is the
7480 * slower it uses).
7481 *
7482 * Always keep in mind that the DSDT *will* have set the
7483 * fans to what the vendor supposes is the best level. We
7484 * muck with it only to speed the fan up.
7485 */
7486 if (fan_control_resume_level != 7 &&
7487 !(fan_control_resume_level & TP_EC_FAN_FULLSPEED))
7488 return;
7489 else
7490 do_set = !(current_level & TP_EC_FAN_FULLSPEED) &&
7491 (current_level != fan_control_resume_level);
7492 break;
7493 default:
7494 return;
7495 }
7496 if (do_set) {
7497 printk(TPACPI_NOTICE
7498 "restoring fan level to 0x%02x\n",
7499 fan_control_resume_level);
7500 rc = fan_set_level_safe(fan_control_resume_level);
7501 if (rc < 0)
7502 printk(TPACPI_NOTICE
7503 "failed to restore fan level: %d\n", rc);
7504 }
7505 }
7506
7507 static int fan_read(char *p)
7508 {
7509 int len = 0;
7510 int rc;
7511 u8 status;
7512 unsigned int speed = 0;
7513
7514 switch (fan_status_access_mode) {
7515 case TPACPI_FAN_RD_ACPI_GFAN:
7516 /* 570, 600e/x, 770e, 770x */
7517 rc = fan_get_status_safe(&status);
7518 if (rc < 0)
7519 return rc;
7520
7521 len += sprintf(p + len, "status:\t\t%s\n"
7522 "level:\t\t%d\n",
7523 (status != 0) ? "enabled" : "disabled", status);
7524 break;
7525
7526 case TPACPI_FAN_RD_TPEC:
7527 /* all except 570, 600e/x, 770e, 770x */
7528 rc = fan_get_status_safe(&status);
7529 if (rc < 0)
7530 return rc;
7531
7532 len += sprintf(p + len, "status:\t\t%s\n",
7533 (status != 0) ? "enabled" : "disabled");
7534
7535 rc = fan_get_speed(&speed);
7536 if (rc < 0)
7537 return rc;
7538
7539 len += sprintf(p + len, "speed:\t\t%d\n", speed);
7540
7541 if (status & TP_EC_FAN_FULLSPEED)
7542 /* Disengaged mode takes precedence */
7543 len += sprintf(p + len, "level:\t\tdisengaged\n");
7544 else if (status & TP_EC_FAN_AUTO)
7545 len += sprintf(p + len, "level:\t\tauto\n");
7546 else
7547 len += sprintf(p + len, "level:\t\t%d\n", status);
7548 break;
7549
7550 case TPACPI_FAN_NONE:
7551 default:
7552 len += sprintf(p + len, "status:\t\tnot supported\n");
7553 }
7554
7555 if (fan_control_commands & TPACPI_FAN_CMD_LEVEL) {
7556 len += sprintf(p + len, "commands:\tlevel <level>");
7557
7558 switch (fan_control_access_mode) {
7559 case TPACPI_FAN_WR_ACPI_SFAN:
7560 len += sprintf(p + len, " (<level> is 0-7)\n");
7561 break;
7562
7563 default:
7564 len += sprintf(p + len, " (<level> is 0-7, "
7565 "auto, disengaged, full-speed)\n");
7566 break;
7567 }
7568 }
7569
7570 if (fan_control_commands & TPACPI_FAN_CMD_ENABLE)
7571 len += sprintf(p + len, "commands:\tenable, disable\n"
7572 "commands:\twatchdog <timeout> (<timeout> "
7573 "is 0 (off), 1-120 (seconds))\n");
7574
7575 if (fan_control_commands & TPACPI_FAN_CMD_SPEED)
7576 len += sprintf(p + len, "commands:\tspeed <speed>"
7577 " (<speed> is 0-65535)\n");
7578
7579 return len;
7580 }
7581
7582 static int fan_write_cmd_level(const char *cmd, int *rc)
7583 {
7584 int level;
7585
7586 if (strlencmp(cmd, "level auto") == 0)
7587 level = TP_EC_FAN_AUTO;
7588 else if ((strlencmp(cmd, "level disengaged") == 0) |
7589 (strlencmp(cmd, "level full-speed") == 0))
7590 level = TP_EC_FAN_FULLSPEED;
7591 else if (sscanf(cmd, "level %d", &level) != 1)
7592 return 0;
7593
7594 *rc = fan_set_level_safe(level);
7595 if (*rc == -ENXIO)
7596 printk(TPACPI_ERR "level command accepted for unsupported "
7597 "access mode %d", fan_control_access_mode);
7598 else if (!*rc)
7599 tpacpi_disclose_usertask("procfs fan",
7600 "set level to %d\n", level);
7601
7602 return 1;
7603 }
7604
7605 static int fan_write_cmd_enable(const char *cmd, int *rc)
7606 {
7607 if (strlencmp(cmd, "enable") != 0)
7608 return 0;
7609
7610 *rc = fan_set_enable();
7611 if (*rc == -ENXIO)
7612 printk(TPACPI_ERR "enable command accepted for unsupported "
7613 "access mode %d", fan_control_access_mode);
7614 else if (!*rc)
7615 tpacpi_disclose_usertask("procfs fan", "enable\n");
7616
7617 return 1;
7618 }
7619
7620 static int fan_write_cmd_disable(const char *cmd, int *rc)
7621 {
7622 if (strlencmp(cmd, "disable") != 0)
7623 return 0;
7624
7625 *rc = fan_set_disable();
7626 if (*rc == -ENXIO)
7627 printk(TPACPI_ERR "disable command accepted for unsupported "
7628 "access mode %d", fan_control_access_mode);
7629 else if (!*rc)
7630 tpacpi_disclose_usertask("procfs fan", "disable\n");
7631
7632 return 1;
7633 }
7634
7635 static int fan_write_cmd_speed(const char *cmd, int *rc)
7636 {
7637 int speed;
7638
7639 /* TODO:
7640 * Support speed <low> <medium> <high> ? */
7641
7642 if (sscanf(cmd, "speed %d", &speed) != 1)
7643 return 0;
7644
7645 *rc = fan_set_speed(speed);
7646 if (*rc == -ENXIO)
7647 printk(TPACPI_ERR "speed command accepted for unsupported "
7648 "access mode %d", fan_control_access_mode);
7649 else if (!*rc)
7650 tpacpi_disclose_usertask("procfs fan",
7651 "set speed to %d\n", speed);
7652
7653 return 1;
7654 }
7655
7656 static int fan_write_cmd_watchdog(const char *cmd, int *rc)
7657 {
7658 int interval;
7659
7660 if (sscanf(cmd, "watchdog %d", &interval) != 1)
7661 return 0;
7662
7663 if (interval < 0 || interval > 120)
7664 *rc = -EINVAL;
7665 else {
7666 fan_watchdog_maxinterval = interval;
7667 tpacpi_disclose_usertask("procfs fan",
7668 "set watchdog timer to %d\n",
7669 interval);
7670 }
7671
7672 return 1;
7673 }
7674
7675 static int fan_write(char *buf)
7676 {
7677 char *cmd;
7678 int rc = 0;
7679
7680 while (!rc && (cmd = next_cmd(&buf))) {
7681 if (!((fan_control_commands & TPACPI_FAN_CMD_LEVEL) &&
7682 fan_write_cmd_level(cmd, &rc)) &&
7683 !((fan_control_commands & TPACPI_FAN_CMD_ENABLE) &&
7684 (fan_write_cmd_enable(cmd, &rc) ||
7685 fan_write_cmd_disable(cmd, &rc) ||
7686 fan_write_cmd_watchdog(cmd, &rc))) &&
7687 !((fan_control_commands & TPACPI_FAN_CMD_SPEED) &&
7688 fan_write_cmd_speed(cmd, &rc))
7689 )
7690 rc = -EINVAL;
7691 else if (!rc)
7692 fan_watchdog_reset();
7693 }
7694
7695 return rc;
7696 }
7697
7698 static struct ibm_struct fan_driver_data = {
7699 .name = "fan",
7700 .read = fan_read,
7701 .write = fan_write,
7702 .exit = fan_exit,
7703 .suspend = fan_suspend,
7704 .resume = fan_resume,
7705 };
7706
7707 /****************************************************************************
7708 ****************************************************************************
7709 *
7710 * Infrastructure
7711 *
7712 ****************************************************************************
7713 ****************************************************************************/
7714
7715 /*
7716 * HKEY event callout for other subdrivers go here
7717 * (yes, it is ugly, but it is quick, safe, and gets the job done
7718 */
7719 static void tpacpi_driver_event(const unsigned int hkey_event)
7720 {
7721 if (ibm_backlight_device) {
7722 switch (hkey_event) {
7723 case TP_HKEY_EV_BRGHT_UP:
7724 case TP_HKEY_EV_BRGHT_DOWN:
7725 tpacpi_brightness_notify_change();
7726 }
7727 }
7728 }
7729
7730
7731
7732 static void hotkey_driver_event(const unsigned int scancode)
7733 {
7734 tpacpi_driver_event(TP_HKEY_EV_HOTKEY_BASE + scancode);
7735 }
7736
7737 /* sysfs name ---------------------------------------------------------- */
7738 static ssize_t thinkpad_acpi_pdev_name_show(struct device *dev,
7739 struct device_attribute *attr,
7740 char *buf)
7741 {
7742 return snprintf(buf, PAGE_SIZE, "%s\n", TPACPI_NAME);
7743 }
7744
7745 static struct device_attribute dev_attr_thinkpad_acpi_pdev_name =
7746 __ATTR(name, S_IRUGO, thinkpad_acpi_pdev_name_show, NULL);
7747
7748 /* --------------------------------------------------------------------- */
7749
7750 /* /proc support */
7751 static struct proc_dir_entry *proc_dir;
7752
7753 /*
7754 * Module and infrastructure proble, init and exit handling
7755 */
7756
7757 static int force_load;
7758
7759 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
7760 static const char * __init str_supported(int is_supported)
7761 {
7762 static char text_unsupported[] __initdata = "not supported";
7763
7764 return (is_supported)? &text_unsupported[4] : &text_unsupported[0];
7765 }
7766 #endif /* CONFIG_THINKPAD_ACPI_DEBUG */
7767
7768 static void ibm_exit(struct ibm_struct *ibm)
7769 {
7770 dbg_printk(TPACPI_DBG_EXIT, "removing %s\n", ibm->name);
7771
7772 list_del_init(&ibm->all_drivers);
7773
7774 if (ibm->flags.acpi_notify_installed) {
7775 dbg_printk(TPACPI_DBG_EXIT,
7776 "%s: acpi_remove_notify_handler\n", ibm->name);
7777 BUG_ON(!ibm->acpi);
7778 acpi_remove_notify_handler(*ibm->acpi->handle,
7779 ibm->acpi->type,
7780 dispatch_acpi_notify);
7781 ibm->flags.acpi_notify_installed = 0;
7782 ibm->flags.acpi_notify_installed = 0;
7783 }
7784
7785 if (ibm->flags.proc_created) {
7786 dbg_printk(TPACPI_DBG_EXIT,
7787 "%s: remove_proc_entry\n", ibm->name);
7788 remove_proc_entry(ibm->name, proc_dir);
7789 ibm->flags.proc_created = 0;
7790 }
7791
7792 if (ibm->flags.acpi_driver_registered) {
7793 dbg_printk(TPACPI_DBG_EXIT,
7794 "%s: acpi_bus_unregister_driver\n", ibm->name);
7795 BUG_ON(!ibm->acpi);
7796 acpi_bus_unregister_driver(ibm->acpi->driver);
7797 kfree(ibm->acpi->driver);
7798 ibm->acpi->driver = NULL;
7799 ibm->flags.acpi_driver_registered = 0;
7800 }
7801
7802 if (ibm->flags.init_called && ibm->exit) {
7803 ibm->exit();
7804 ibm->flags.init_called = 0;
7805 }
7806
7807 dbg_printk(TPACPI_DBG_INIT, "finished removing %s\n", ibm->name);
7808 }
7809
7810 static int __init ibm_init(struct ibm_init_struct *iibm)
7811 {
7812 int ret;
7813 struct ibm_struct *ibm = iibm->data;
7814 struct proc_dir_entry *entry;
7815
7816 BUG_ON(ibm == NULL);
7817
7818 INIT_LIST_HEAD(&ibm->all_drivers);
7819
7820 if (ibm->flags.experimental && !experimental)
7821 return 0;
7822
7823 dbg_printk(TPACPI_DBG_INIT,
7824 "probing for %s\n", ibm->name);
7825
7826 if (iibm->init) {
7827 ret = iibm->init(iibm);
7828 if (ret > 0)
7829 return 0; /* probe failed */
7830 if (ret)
7831 return ret;
7832
7833 ibm->flags.init_called = 1;
7834 }
7835
7836 if (ibm->acpi) {
7837 if (ibm->acpi->hid) {
7838 ret = register_tpacpi_subdriver(ibm);
7839 if (ret)
7840 goto err_out;
7841 }
7842
7843 if (ibm->acpi->notify) {
7844 ret = setup_acpi_notify(ibm);
7845 if (ret == -ENODEV) {
7846 printk(TPACPI_NOTICE "disabling subdriver %s\n",
7847 ibm->name);
7848 ret = 0;
7849 goto err_out;
7850 }
7851 if (ret < 0)
7852 goto err_out;
7853 }
7854 }
7855
7856 dbg_printk(TPACPI_DBG_INIT,
7857 "%s installed\n", ibm->name);
7858
7859 if (ibm->read) {
7860 entry = create_proc_entry(ibm->name,
7861 S_IFREG | S_IRUGO | S_IWUSR,
7862 proc_dir);
7863 if (!entry) {
7864 printk(TPACPI_ERR "unable to create proc entry %s\n",
7865 ibm->name);
7866 ret = -ENODEV;
7867 goto err_out;
7868 }
7869 entry->data = ibm;
7870 entry->read_proc = &dispatch_procfs_read;
7871 if (ibm->write)
7872 entry->write_proc = &dispatch_procfs_write;
7873 ibm->flags.proc_created = 1;
7874 }
7875
7876 list_add_tail(&ibm->all_drivers, &tpacpi_all_drivers);
7877
7878 return 0;
7879
7880 err_out:
7881 dbg_printk(TPACPI_DBG_INIT,
7882 "%s: at error exit path with result %d\n",
7883 ibm->name, ret);
7884
7885 ibm_exit(ibm);
7886 return (ret < 0)? ret : 0;
7887 }
7888
7889 /* Probing */
7890
7891 static bool __pure __init tpacpi_is_fw_digit(const char c)
7892 {
7893 return (c >= '0' && c <= '9') || (c >= 'A' && c <= 'Z');
7894 }
7895
7896 /* Most models: xxyTkkWW (#.##c); Ancient 570/600 and -SL lacks (#.##c) */
7897 static bool __pure __init tpacpi_is_valid_fw_id(const char* const s,
7898 const char t)
7899 {
7900 return s && strlen(s) >= 8 &&
7901 tpacpi_is_fw_digit(s[0]) &&
7902 tpacpi_is_fw_digit(s[1]) &&
7903 s[2] == t && s[3] == 'T' &&
7904 tpacpi_is_fw_digit(s[4]) &&
7905 tpacpi_is_fw_digit(s[5]) &&
7906 s[6] == 'W' && s[7] == 'W';
7907 }
7908
7909 /* returns 0 - probe ok, or < 0 - probe error.
7910 * Probe ok doesn't mean thinkpad found.
7911 * On error, kfree() cleanup on tp->* is not performed, caller must do it */
7912 static int __must_check __init get_thinkpad_model_data(
7913 struct thinkpad_id_data *tp)
7914 {
7915 const struct dmi_device *dev = NULL;
7916 char ec_fw_string[18];
7917 char const *s;
7918
7919 if (!tp)
7920 return -EINVAL;
7921
7922 memset(tp, 0, sizeof(*tp));
7923
7924 if (dmi_name_in_vendors("IBM"))
7925 tp->vendor = PCI_VENDOR_ID_IBM;
7926 else if (dmi_name_in_vendors("LENOVO"))
7927 tp->vendor = PCI_VENDOR_ID_LENOVO;
7928 else
7929 return 0;
7930
7931 s = dmi_get_system_info(DMI_BIOS_VERSION);
7932 tp->bios_version_str = kstrdup(s, GFP_KERNEL);
7933 if (s && !tp->bios_version_str)
7934 return -ENOMEM;
7935
7936 /* Really ancient ThinkPad 240X will fail this, which is fine */
7937 if (!tpacpi_is_valid_fw_id(tp->bios_version_str, 'E'))
7938 return 0;
7939
7940 tp->bios_model = tp->bios_version_str[0]
7941 | (tp->bios_version_str[1] << 8);
7942 tp->bios_release = (tp->bios_version_str[4] << 8)
7943 | tp->bios_version_str[5];
7944
7945 /*
7946 * ThinkPad T23 or newer, A31 or newer, R50e or newer,
7947 * X32 or newer, all Z series; Some models must have an
7948 * up-to-date BIOS or they will not be detected.
7949 *
7950 * See http://thinkwiki.org/wiki/List_of_DMI_IDs
7951 */
7952 while ((dev = dmi_find_device(DMI_DEV_TYPE_OEM_STRING, NULL, dev))) {
7953 if (sscanf(dev->name,
7954 "IBM ThinkPad Embedded Controller -[%17c",
7955 ec_fw_string) == 1) {
7956 ec_fw_string[sizeof(ec_fw_string) - 1] = 0;
7957 ec_fw_string[strcspn(ec_fw_string, " ]")] = 0;
7958
7959 tp->ec_version_str = kstrdup(ec_fw_string, GFP_KERNEL);
7960 if (!tp->ec_version_str)
7961 return -ENOMEM;
7962
7963 if (tpacpi_is_valid_fw_id(ec_fw_string, 'H')) {
7964 tp->ec_model = ec_fw_string[0]
7965 | (ec_fw_string[1] << 8);
7966 tp->ec_release = (ec_fw_string[4] << 8)
7967 | ec_fw_string[5];
7968 } else {
7969 printk(TPACPI_NOTICE
7970 "ThinkPad firmware release %s "
7971 "doesn't match the known patterns\n",
7972 ec_fw_string);
7973 printk(TPACPI_NOTICE
7974 "please report this to %s\n",
7975 TPACPI_MAIL);
7976 }
7977 break;
7978 }
7979 }
7980
7981 s = dmi_get_system_info(DMI_PRODUCT_VERSION);
7982 if (s && !strnicmp(s, "ThinkPad", 8)) {
7983 tp->model_str = kstrdup(s, GFP_KERNEL);
7984 if (!tp->model_str)
7985 return -ENOMEM;
7986 }
7987
7988 s = dmi_get_system_info(DMI_PRODUCT_NAME);
7989 tp->nummodel_str = kstrdup(s, GFP_KERNEL);
7990 if (s && !tp->nummodel_str)
7991 return -ENOMEM;
7992
7993 return 0;
7994 }
7995
7996 static int __init probe_for_thinkpad(void)
7997 {
7998 int is_thinkpad;
7999
8000 if (acpi_disabled)
8001 return -ENODEV;
8002
8003 /*
8004 * Non-ancient models have better DMI tagging, but very old models
8005 * don't. tpacpi_is_fw_known() is a cheat to help in that case.
8006 */
8007 is_thinkpad = (thinkpad_id.model_str != NULL) ||
8008 (thinkpad_id.ec_model != 0) ||
8009 tpacpi_is_fw_known();
8010
8011 /* ec is required because many other handles are relative to it */
8012 TPACPI_ACPIHANDLE_INIT(ec);
8013 if (!ec_handle) {
8014 if (is_thinkpad)
8015 printk(TPACPI_ERR
8016 "Not yet supported ThinkPad detected!\n");
8017 return -ENODEV;
8018 }
8019
8020 if (!is_thinkpad && !force_load)
8021 return -ENODEV;
8022
8023 return 0;
8024 }
8025
8026
8027 /* Module init, exit, parameters */
8028
8029 static struct ibm_init_struct ibms_init[] __initdata = {
8030 {
8031 .init = thinkpad_acpi_driver_init,
8032 .data = &thinkpad_acpi_driver_data,
8033 },
8034 {
8035 .init = hotkey_init,
8036 .data = &hotkey_driver_data,
8037 },
8038 {
8039 .init = bluetooth_init,
8040 .data = &bluetooth_driver_data,
8041 },
8042 {
8043 .init = wan_init,
8044 .data = &wan_driver_data,
8045 },
8046 {
8047 .init = uwb_init,
8048 .data = &uwb_driver_data,
8049 },
8050 #ifdef CONFIG_THINKPAD_ACPI_VIDEO
8051 {
8052 .init = video_init,
8053 .data = &video_driver_data,
8054 },
8055 #endif
8056 {
8057 .init = light_init,
8058 .data = &light_driver_data,
8059 },
8060 {
8061 .init = cmos_init,
8062 .data = &cmos_driver_data,
8063 },
8064 {
8065 .init = led_init,
8066 .data = &led_driver_data,
8067 },
8068 {
8069 .init = beep_init,
8070 .data = &beep_driver_data,
8071 },
8072 {
8073 .init = thermal_init,
8074 .data = &thermal_driver_data,
8075 },
8076 {
8077 .data = &ecdump_driver_data,
8078 },
8079 {
8080 .init = brightness_init,
8081 .data = &brightness_driver_data,
8082 },
8083 {
8084 .data = &volume_driver_data,
8085 },
8086 {
8087 .init = fan_init,
8088 .data = &fan_driver_data,
8089 },
8090 };
8091
8092 static int __init set_ibm_param(const char *val, struct kernel_param *kp)
8093 {
8094 unsigned int i;
8095 struct ibm_struct *ibm;
8096
8097 if (!kp || !kp->name || !val)
8098 return -EINVAL;
8099
8100 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
8101 ibm = ibms_init[i].data;
8102 WARN_ON(ibm == NULL);
8103
8104 if (!ibm || !ibm->name)
8105 continue;
8106
8107 if (strcmp(ibm->name, kp->name) == 0 && ibm->write) {
8108 if (strlen(val) > sizeof(ibms_init[i].param) - 2)
8109 return -ENOSPC;
8110 strcpy(ibms_init[i].param, val);
8111 strcat(ibms_init[i].param, ",");
8112 return 0;
8113 }
8114 }
8115
8116 return -EINVAL;
8117 }
8118
8119 module_param(experimental, int, 0444);
8120 MODULE_PARM_DESC(experimental,
8121 "Enables experimental features when non-zero");
8122
8123 module_param_named(debug, dbg_level, uint, 0);
8124 MODULE_PARM_DESC(debug, "Sets debug level bit-mask");
8125
8126 module_param(force_load, bool, 0444);
8127 MODULE_PARM_DESC(force_load,
8128 "Attempts to load the driver even on a "
8129 "mis-identified ThinkPad when true");
8130
8131 module_param_named(fan_control, fan_control_allowed, bool, 0444);
8132 MODULE_PARM_DESC(fan_control,
8133 "Enables setting fan parameters features when true");
8134
8135 module_param_named(brightness_mode, brightness_mode, uint, 0444);
8136 MODULE_PARM_DESC(brightness_mode,
8137 "Selects brightness control strategy: "
8138 "0=auto, 1=EC, 2=UCMS, 3=EC+NVRAM");
8139
8140 module_param(brightness_enable, uint, 0444);
8141 MODULE_PARM_DESC(brightness_enable,
8142 "Enables backlight control when 1, disables when 0");
8143
8144 module_param(hotkey_report_mode, uint, 0444);
8145 MODULE_PARM_DESC(hotkey_report_mode,
8146 "used for backwards compatibility with userspace, "
8147 "see documentation");
8148
8149 #define TPACPI_PARAM(feature) \
8150 module_param_call(feature, set_ibm_param, NULL, NULL, 0); \
8151 MODULE_PARM_DESC(feature, "Simulates thinkpad-acpi procfs command " \
8152 "at module load, see documentation")
8153
8154 TPACPI_PARAM(hotkey);
8155 TPACPI_PARAM(bluetooth);
8156 TPACPI_PARAM(video);
8157 TPACPI_PARAM(light);
8158 TPACPI_PARAM(cmos);
8159 TPACPI_PARAM(led);
8160 TPACPI_PARAM(beep);
8161 TPACPI_PARAM(ecdump);
8162 TPACPI_PARAM(brightness);
8163 TPACPI_PARAM(volume);
8164 TPACPI_PARAM(fan);
8165
8166 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
8167 module_param(dbg_wlswemul, uint, 0444);
8168 MODULE_PARM_DESC(dbg_wlswemul, "Enables WLSW emulation");
8169 module_param_named(wlsw_state, tpacpi_wlsw_emulstate, bool, 0);
8170 MODULE_PARM_DESC(wlsw_state,
8171 "Initial state of the emulated WLSW switch");
8172
8173 module_param(dbg_bluetoothemul, uint, 0444);
8174 MODULE_PARM_DESC(dbg_bluetoothemul, "Enables bluetooth switch emulation");
8175 module_param_named(bluetooth_state, tpacpi_bluetooth_emulstate, bool, 0);
8176 MODULE_PARM_DESC(bluetooth_state,
8177 "Initial state of the emulated bluetooth switch");
8178
8179 module_param(dbg_wwanemul, uint, 0444);
8180 MODULE_PARM_DESC(dbg_wwanemul, "Enables WWAN switch emulation");
8181 module_param_named(wwan_state, tpacpi_wwan_emulstate, bool, 0);
8182 MODULE_PARM_DESC(wwan_state,
8183 "Initial state of the emulated WWAN switch");
8184
8185 module_param(dbg_uwbemul, uint, 0444);
8186 MODULE_PARM_DESC(dbg_uwbemul, "Enables UWB switch emulation");
8187 module_param_named(uwb_state, tpacpi_uwb_emulstate, bool, 0);
8188 MODULE_PARM_DESC(uwb_state,
8189 "Initial state of the emulated UWB switch");
8190 #endif
8191
8192 static void thinkpad_acpi_module_exit(void)
8193 {
8194 struct ibm_struct *ibm, *itmp;
8195
8196 tpacpi_lifecycle = TPACPI_LIFE_EXITING;
8197
8198 list_for_each_entry_safe_reverse(ibm, itmp,
8199 &tpacpi_all_drivers,
8200 all_drivers) {
8201 ibm_exit(ibm);
8202 }
8203
8204 dbg_printk(TPACPI_DBG_INIT, "finished subdriver exit path...\n");
8205
8206 if (tpacpi_inputdev) {
8207 if (tp_features.input_device_registered)
8208 input_unregister_device(tpacpi_inputdev);
8209 else
8210 input_free_device(tpacpi_inputdev);
8211 }
8212
8213 if (tpacpi_hwmon)
8214 hwmon_device_unregister(tpacpi_hwmon);
8215
8216 if (tp_features.sensors_pdev_attrs_registered)
8217 device_remove_file(&tpacpi_sensors_pdev->dev,
8218 &dev_attr_thinkpad_acpi_pdev_name);
8219 if (tpacpi_sensors_pdev)
8220 platform_device_unregister(tpacpi_sensors_pdev);
8221 if (tpacpi_pdev)
8222 platform_device_unregister(tpacpi_pdev);
8223
8224 if (tp_features.sensors_pdrv_attrs_registered)
8225 tpacpi_remove_driver_attributes(&tpacpi_hwmon_pdriver.driver);
8226 if (tp_features.platform_drv_attrs_registered)
8227 tpacpi_remove_driver_attributes(&tpacpi_pdriver.driver);
8228
8229 if (tp_features.sensors_pdrv_registered)
8230 platform_driver_unregister(&tpacpi_hwmon_pdriver);
8231
8232 if (tp_features.platform_drv_registered)
8233 platform_driver_unregister(&tpacpi_pdriver);
8234
8235 if (proc_dir)
8236 remove_proc_entry(TPACPI_PROC_DIR, acpi_root_dir);
8237
8238 if (tpacpi_wq)
8239 destroy_workqueue(tpacpi_wq);
8240
8241 kfree(thinkpad_id.bios_version_str);
8242 kfree(thinkpad_id.ec_version_str);
8243 kfree(thinkpad_id.model_str);
8244 }
8245
8246
8247 static int __init thinkpad_acpi_module_init(void)
8248 {
8249 int ret, i;
8250
8251 tpacpi_lifecycle = TPACPI_LIFE_INIT;
8252
8253 /* Parameter checking */
8254 if (hotkey_report_mode > 2)
8255 return -EINVAL;
8256
8257 /* Driver-level probe */
8258
8259 ret = get_thinkpad_model_data(&thinkpad_id);
8260 if (ret) {
8261 printk(TPACPI_ERR
8262 "unable to get DMI data: %d\n", ret);
8263 thinkpad_acpi_module_exit();
8264 return ret;
8265 }
8266 ret = probe_for_thinkpad();
8267 if (ret) {
8268 thinkpad_acpi_module_exit();
8269 return ret;
8270 }
8271
8272 /* Driver initialization */
8273
8274 TPACPI_ACPIHANDLE_INIT(ecrd);
8275 TPACPI_ACPIHANDLE_INIT(ecwr);
8276
8277 tpacpi_wq = create_singlethread_workqueue(TPACPI_WORKQUEUE_NAME);
8278 if (!tpacpi_wq) {
8279 thinkpad_acpi_module_exit();
8280 return -ENOMEM;
8281 }
8282
8283 proc_dir = proc_mkdir(TPACPI_PROC_DIR, acpi_root_dir);
8284 if (!proc_dir) {
8285 printk(TPACPI_ERR
8286 "unable to create proc dir " TPACPI_PROC_DIR);
8287 thinkpad_acpi_module_exit();
8288 return -ENODEV;
8289 }
8290
8291 ret = platform_driver_register(&tpacpi_pdriver);
8292 if (ret) {
8293 printk(TPACPI_ERR
8294 "unable to register main platform driver\n");
8295 thinkpad_acpi_module_exit();
8296 return ret;
8297 }
8298 tp_features.platform_drv_registered = 1;
8299
8300 ret = platform_driver_register(&tpacpi_hwmon_pdriver);
8301 if (ret) {
8302 printk(TPACPI_ERR
8303 "unable to register hwmon platform driver\n");
8304 thinkpad_acpi_module_exit();
8305 return ret;
8306 }
8307 tp_features.sensors_pdrv_registered = 1;
8308
8309 ret = tpacpi_create_driver_attributes(&tpacpi_pdriver.driver);
8310 if (!ret) {
8311 tp_features.platform_drv_attrs_registered = 1;
8312 ret = tpacpi_create_driver_attributes(
8313 &tpacpi_hwmon_pdriver.driver);
8314 }
8315 if (ret) {
8316 printk(TPACPI_ERR
8317 "unable to create sysfs driver attributes\n");
8318 thinkpad_acpi_module_exit();
8319 return ret;
8320 }
8321 tp_features.sensors_pdrv_attrs_registered = 1;
8322
8323
8324 /* Device initialization */
8325 tpacpi_pdev = platform_device_register_simple(TPACPI_DRVR_NAME, -1,
8326 NULL, 0);
8327 if (IS_ERR(tpacpi_pdev)) {
8328 ret = PTR_ERR(tpacpi_pdev);
8329 tpacpi_pdev = NULL;
8330 printk(TPACPI_ERR "unable to register platform device\n");
8331 thinkpad_acpi_module_exit();
8332 return ret;
8333 }
8334 tpacpi_sensors_pdev = platform_device_register_simple(
8335 TPACPI_HWMON_DRVR_NAME,
8336 -1, NULL, 0);
8337 if (IS_ERR(tpacpi_sensors_pdev)) {
8338 ret = PTR_ERR(tpacpi_sensors_pdev);
8339 tpacpi_sensors_pdev = NULL;
8340 printk(TPACPI_ERR
8341 "unable to register hwmon platform device\n");
8342 thinkpad_acpi_module_exit();
8343 return ret;
8344 }
8345 ret = device_create_file(&tpacpi_sensors_pdev->dev,
8346 &dev_attr_thinkpad_acpi_pdev_name);
8347 if (ret) {
8348 printk(TPACPI_ERR
8349 "unable to create sysfs hwmon device attributes\n");
8350 thinkpad_acpi_module_exit();
8351 return ret;
8352 }
8353 tp_features.sensors_pdev_attrs_registered = 1;
8354 tpacpi_hwmon = hwmon_device_register(&tpacpi_sensors_pdev->dev);
8355 if (IS_ERR(tpacpi_hwmon)) {
8356 ret = PTR_ERR(tpacpi_hwmon);
8357 tpacpi_hwmon = NULL;
8358 printk(TPACPI_ERR "unable to register hwmon device\n");
8359 thinkpad_acpi_module_exit();
8360 return ret;
8361 }
8362 mutex_init(&tpacpi_inputdev_send_mutex);
8363 tpacpi_inputdev = input_allocate_device();
8364 if (!tpacpi_inputdev) {
8365 printk(TPACPI_ERR "unable to allocate input device\n");
8366 thinkpad_acpi_module_exit();
8367 return -ENOMEM;
8368 } else {
8369 /* Prepare input device, but don't register */
8370 tpacpi_inputdev->name = "ThinkPad Extra Buttons";
8371 tpacpi_inputdev->phys = TPACPI_DRVR_NAME "/input0";
8372 tpacpi_inputdev->id.bustype = BUS_HOST;
8373 tpacpi_inputdev->id.vendor = (thinkpad_id.vendor) ?
8374 thinkpad_id.vendor :
8375 PCI_VENDOR_ID_IBM;
8376 tpacpi_inputdev->id.product = TPACPI_HKEY_INPUT_PRODUCT;
8377 tpacpi_inputdev->id.version = TPACPI_HKEY_INPUT_VERSION;
8378 tpacpi_inputdev->dev.parent = &tpacpi_pdev->dev;
8379 }
8380 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
8381 ret = ibm_init(&ibms_init[i]);
8382 if (ret >= 0 && *ibms_init[i].param)
8383 ret = ibms_init[i].data->write(ibms_init[i].param);
8384 if (ret < 0) {
8385 thinkpad_acpi_module_exit();
8386 return ret;
8387 }
8388 }
8389 ret = input_register_device(tpacpi_inputdev);
8390 if (ret < 0) {
8391 printk(TPACPI_ERR "unable to register input device\n");
8392 thinkpad_acpi_module_exit();
8393 return ret;
8394 } else {
8395 tp_features.input_device_registered = 1;
8396 }
8397
8398 tpacpi_lifecycle = TPACPI_LIFE_RUNNING;
8399 return 0;
8400 }
8401
8402 MODULE_ALIAS(TPACPI_DRVR_SHORTNAME);
8403
8404 /*
8405 * This will autoload the driver in almost every ThinkPad
8406 * in widespread use.
8407 *
8408 * Only _VERY_ old models, like the 240, 240x and 570 lack
8409 * the HKEY event interface.
8410 */
8411 MODULE_DEVICE_TABLE(acpi, ibm_htk_device_ids);
8412
8413 /*
8414 * DMI matching for module autoloading
8415 *
8416 * See http://thinkwiki.org/wiki/List_of_DMI_IDs
8417 * See http://thinkwiki.org/wiki/BIOS_Upgrade_Downloads
8418 *
8419 * Only models listed in thinkwiki will be supported, so add yours
8420 * if it is not there yet.
8421 */
8422 #define IBM_BIOS_MODULE_ALIAS(__type) \
8423 MODULE_ALIAS("dmi:bvnIBM:bvr" __type "ET??WW*")
8424
8425 /* Ancient thinkpad BIOSes have to be identified by
8426 * BIOS type or model number, and there are far less
8427 * BIOS types than model numbers... */
8428 IBM_BIOS_MODULE_ALIAS("I[MU]"); /* 570, 570e */
8429
8430 MODULE_AUTHOR("Borislav Deianov <borislav@users.sf.net>");
8431 MODULE_AUTHOR("Henrique de Moraes Holschuh <hmh@hmh.eng.br>");
8432 MODULE_DESCRIPTION(TPACPI_DESC);
8433 MODULE_VERSION(TPACPI_VERSION);
8434 MODULE_LICENSE("GPL");
8435
8436 module_init(thinkpad_acpi_module_init);
8437 module_exit(thinkpad_acpi_module_exit);
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree