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thinkpad-acpi: lock down video output state access
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / platform / x86 / thinkpad_acpi.c
blobe7b0c3bcef895b41f41298617e73c963024f1d2e
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 "0.24"
25 #define TPACPI_SYSFS_VERSION 0x020700
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/seq_file.h>
65 #include <linux/sysfs.h>
66 #include <linux/backlight.h>
67 #include <linux/fb.h>
68 #include <linux/platform_device.h>
69 #include <linux/hwmon.h>
70 #include <linux/hwmon-sysfs.h>
71 #include <linux/input.h>
72 #include <linux/leds.h>
73 #include <linux/rfkill.h>
74 #include <asm/uaccess.h>
75
76 #include <linux/dmi.h>
77 #include <linux/jiffies.h>
78 #include <linux/workqueue.h>
79
80 #include <sound/core.h>
81 #include <sound/control.h>
82 #include <sound/initval.h>
83
84 #include <acpi/acpi_drivers.h>
85
86 #include <linux/pci_ids.h>
87
88
89 /* ThinkPad CMOS commands */
90 #define TP_CMOS_VOLUME_DOWN 0
91 #define TP_CMOS_VOLUME_UP 1
92 #define TP_CMOS_VOLUME_MUTE 2
93 #define TP_CMOS_BRIGHTNESS_UP 4
94 #define TP_CMOS_BRIGHTNESS_DOWN 5
95 #define TP_CMOS_THINKLIGHT_ON 12
96 #define TP_CMOS_THINKLIGHT_OFF 13
97
98 /* NVRAM Addresses */
99 enum tp_nvram_addr {
100 TP_NVRAM_ADDR_HK2 = 0x57,
101 TP_NVRAM_ADDR_THINKLIGHT = 0x58,
102 TP_NVRAM_ADDR_VIDEO = 0x59,
103 TP_NVRAM_ADDR_BRIGHTNESS = 0x5e,
104 TP_NVRAM_ADDR_MIXER = 0x60,
105 };
106
107 /* NVRAM bit masks */
108 enum {
109 TP_NVRAM_MASK_HKT_THINKPAD = 0x08,
110 TP_NVRAM_MASK_HKT_ZOOM = 0x20,
111 TP_NVRAM_MASK_HKT_DISPLAY = 0x40,
112 TP_NVRAM_MASK_HKT_HIBERNATE = 0x80,
113 TP_NVRAM_MASK_THINKLIGHT = 0x10,
114 TP_NVRAM_MASK_HKT_DISPEXPND = 0x30,
115 TP_NVRAM_MASK_HKT_BRIGHTNESS = 0x20,
116 TP_NVRAM_MASK_LEVEL_BRIGHTNESS = 0x0f,
117 TP_NVRAM_POS_LEVEL_BRIGHTNESS = 0,
118 TP_NVRAM_MASK_MUTE = 0x40,
119 TP_NVRAM_MASK_HKT_VOLUME = 0x80,
120 TP_NVRAM_MASK_LEVEL_VOLUME = 0x0f,
121 TP_NVRAM_POS_LEVEL_VOLUME = 0,
122 };
123
124 /* ACPI HIDs */
125 #define TPACPI_ACPI_HKEY_HID "IBM0068"
126
127 /* Input IDs */
128 #define TPACPI_HKEY_INPUT_PRODUCT 0x5054 /* "TP" */
129 #define TPACPI_HKEY_INPUT_VERSION 0x4101
130
131 /* ACPI \WGSV commands */
132 enum {
133 TP_ACPI_WGSV_GET_STATE = 0x01, /* Get state information */
134 TP_ACPI_WGSV_PWR_ON_ON_RESUME = 0x02, /* Resume WWAN powered on */
135 TP_ACPI_WGSV_PWR_OFF_ON_RESUME = 0x03, /* Resume WWAN powered off */
136 TP_ACPI_WGSV_SAVE_STATE = 0x04, /* Save state for S4/S5 */
137 };
138
139 /* TP_ACPI_WGSV_GET_STATE bits */
140 enum {
141 TP_ACPI_WGSV_STATE_WWANEXIST = 0x0001, /* WWAN hw available */
142 TP_ACPI_WGSV_STATE_WWANPWR = 0x0002, /* WWAN radio enabled */
143 TP_ACPI_WGSV_STATE_WWANPWRRES = 0x0004, /* WWAN state at resume */
144 TP_ACPI_WGSV_STATE_WWANBIOSOFF = 0x0008, /* WWAN disabled in BIOS */
145 TP_ACPI_WGSV_STATE_BLTHEXIST = 0x0001, /* BLTH hw available */
146 TP_ACPI_WGSV_STATE_BLTHPWR = 0x0002, /* BLTH radio enabled */
147 TP_ACPI_WGSV_STATE_BLTHPWRRES = 0x0004, /* BLTH state at resume */
148 TP_ACPI_WGSV_STATE_BLTHBIOSOFF = 0x0008, /* BLTH disabled in BIOS */
149 TP_ACPI_WGSV_STATE_UWBEXIST = 0x0010, /* UWB hw available */
150 TP_ACPI_WGSV_STATE_UWBPWR = 0x0020, /* UWB radio enabled */
151 };
152
153 /* HKEY events */
154 enum tpacpi_hkey_event_t {
155 /* Hotkey-related */
156 TP_HKEY_EV_HOTKEY_BASE = 0x1001, /* first hotkey (FN+F1) */
157 TP_HKEY_EV_BRGHT_UP = 0x1010, /* Brightness up */
158 TP_HKEY_EV_BRGHT_DOWN = 0x1011, /* Brightness down */
159 TP_HKEY_EV_VOL_UP = 0x1015, /* Volume up or unmute */
160 TP_HKEY_EV_VOL_DOWN = 0x1016, /* Volume down or unmute */
161 TP_HKEY_EV_VOL_MUTE = 0x1017, /* Mixer output mute */
162
163 /* Reasons for waking up from S3/S4 */
164 TP_HKEY_EV_WKUP_S3_UNDOCK = 0x2304, /* undock requested, S3 */
165 TP_HKEY_EV_WKUP_S4_UNDOCK = 0x2404, /* undock requested, S4 */
166 TP_HKEY_EV_WKUP_S3_BAYEJ = 0x2305, /* bay ejection req, S3 */
167 TP_HKEY_EV_WKUP_S4_BAYEJ = 0x2405, /* bay ejection req, S4 */
168 TP_HKEY_EV_WKUP_S3_BATLOW = 0x2313, /* battery empty, S3 */
169 TP_HKEY_EV_WKUP_S4_BATLOW = 0x2413, /* battery empty, S4 */
170
171 /* Auto-sleep after eject request */
172 TP_HKEY_EV_BAYEJ_ACK = 0x3003, /* bay ejection complete */
173 TP_HKEY_EV_UNDOCK_ACK = 0x4003, /* undock complete */
174
175 /* Misc bay events */
176 TP_HKEY_EV_OPTDRV_EJ = 0x3006, /* opt. drive tray ejected */
177
178 /* User-interface events */
179 TP_HKEY_EV_LID_CLOSE = 0x5001, /* laptop lid closed */
180 TP_HKEY_EV_LID_OPEN = 0x5002, /* laptop lid opened */
181 TP_HKEY_EV_TABLET_TABLET = 0x5009, /* tablet swivel up */
182 TP_HKEY_EV_TABLET_NOTEBOOK = 0x500a, /* tablet swivel down */
183 TP_HKEY_EV_PEN_INSERTED = 0x500b, /* tablet pen inserted */
184 TP_HKEY_EV_PEN_REMOVED = 0x500c, /* tablet pen removed */
185 TP_HKEY_EV_BRGHT_CHANGED = 0x5010, /* backlight control event */
186
187 /* Thermal events */
188 TP_HKEY_EV_ALARM_BAT_HOT = 0x6011, /* battery too hot */
189 TP_HKEY_EV_ALARM_BAT_XHOT = 0x6012, /* battery critically hot */
190 TP_HKEY_EV_ALARM_SENSOR_HOT = 0x6021, /* sensor too hot */
191 TP_HKEY_EV_ALARM_SENSOR_XHOT = 0x6022, /* sensor critically hot */
192 TP_HKEY_EV_THM_TABLE_CHANGED = 0x6030, /* thermal table changed */
193
194 /* Misc */
195 TP_HKEY_EV_RFKILL_CHANGED = 0x7000, /* rfkill switch changed */
196 };
197
198 /****************************************************************************
199 * Main driver
200 */
201
202 #define TPACPI_NAME "thinkpad"
203 #define TPACPI_DESC "ThinkPad ACPI Extras"
204 #define TPACPI_FILE TPACPI_NAME "_acpi"
205 #define TPACPI_URL "http://ibm-acpi.sf.net/"
206 #define TPACPI_MAIL "ibm-acpi-devel@lists.sourceforge.net"
207
208 #define TPACPI_PROC_DIR "ibm"
209 #define TPACPI_ACPI_EVENT_PREFIX "ibm"
210 #define TPACPI_DRVR_NAME TPACPI_FILE
211 #define TPACPI_DRVR_SHORTNAME "tpacpi"
212 #define TPACPI_HWMON_DRVR_NAME TPACPI_NAME "_hwmon"
213
214 #define TPACPI_NVRAM_KTHREAD_NAME "ktpacpi_nvramd"
215 #define TPACPI_WORKQUEUE_NAME "ktpacpid"
216
217 #define TPACPI_MAX_ACPI_ARGS 3
218
219 /* printk headers */
220 #define TPACPI_LOG TPACPI_FILE ": "
221 #define TPACPI_EMERG KERN_EMERG TPACPI_LOG
222 #define TPACPI_ALERT KERN_ALERT TPACPI_LOG
223 #define TPACPI_CRIT KERN_CRIT TPACPI_LOG
224 #define TPACPI_ERR KERN_ERR TPACPI_LOG
225 #define TPACPI_WARN KERN_WARNING TPACPI_LOG
226 #define TPACPI_NOTICE KERN_NOTICE TPACPI_LOG
227 #define TPACPI_INFO KERN_INFO TPACPI_LOG
228 #define TPACPI_DEBUG KERN_DEBUG TPACPI_LOG
229
230 /* Debugging printk groups */
231 #define TPACPI_DBG_ALL 0xffff
232 #define TPACPI_DBG_DISCLOSETASK 0x8000
233 #define TPACPI_DBG_INIT 0x0001
234 #define TPACPI_DBG_EXIT 0x0002
235 #define TPACPI_DBG_RFKILL 0x0004
236 #define TPACPI_DBG_HKEY 0x0008
237 #define TPACPI_DBG_FAN 0x0010
238 #define TPACPI_DBG_BRGHT 0x0020
239 #define TPACPI_DBG_MIXER 0x0040
240
241 #define onoff(status, bit) ((status) & (1 << (bit)) ? "on" : "off")
242 #define enabled(status, bit) ((status) & (1 << (bit)) ? "enabled" : "disabled")
243 #define strlencmp(a, b) (strncmp((a), (b), strlen(b)))
244
245
246 /****************************************************************************
247 * Driver-wide structs and misc. variables
248 */
249
250 struct ibm_struct;
251
252 struct tp_acpi_drv_struct {
253 const struct acpi_device_id *hid;
254 struct acpi_driver *driver;
255
256 void (*notify) (struct ibm_struct *, u32);
257 acpi_handle *handle;
258 u32 type;
259 struct acpi_device *device;
260 };
261
262 struct ibm_struct {
263 char *name;
264
265 int (*read) (struct seq_file *);
266 int (*write) (char *);
267 void (*exit) (void);
268 void (*resume) (void);
269 void (*suspend) (pm_message_t state);
270 void (*shutdown) (void);
271
272 struct list_head all_drivers;
273
274 struct tp_acpi_drv_struct *acpi;
275
276 struct {
277 u8 acpi_driver_registered:1;
278 u8 acpi_notify_installed:1;
279 u8 proc_created:1;
280 u8 init_called:1;
281 u8 experimental:1;
282 } flags;
283 };
284
285 struct ibm_init_struct {
286 char param[32];
287
288 int (*init) (struct ibm_init_struct *);
289 mode_t base_procfs_mode;
290 struct ibm_struct *data;
291 };
292
293 static struct {
294 u32 bluetooth:1;
295 u32 hotkey:1;
296 u32 hotkey_mask:1;
297 u32 hotkey_wlsw:1;
298 u32 hotkey_tablet:1;
299 u32 light:1;
300 u32 light_status:1;
301 u32 bright_16levels:1;
302 u32 bright_acpimode:1;
303 u32 wan:1;
304 u32 uwb:1;
305 u32 fan_ctrl_status_undef:1;
306 u32 second_fan:1;
307 u32 beep_needs_two_args:1;
308 u32 mixer_no_level_control:1;
309 u32 input_device_registered:1;
310 u32 platform_drv_registered:1;
311 u32 platform_drv_attrs_registered:1;
312 u32 sensors_pdrv_registered:1;
313 u32 sensors_pdrv_attrs_registered:1;
314 u32 sensors_pdev_attrs_registered:1;
315 u32 hotkey_poll_active:1;
316 } tp_features;
317
318 static struct {
319 u16 hotkey_mask_ff:1;
320 u16 volume_ctrl_forbidden:1;
321 } tp_warned;
322
323 struct thinkpad_id_data {
324 unsigned int vendor; /* ThinkPad vendor:
325 * PCI_VENDOR_ID_IBM/PCI_VENDOR_ID_LENOVO */
326
327 char *bios_version_str; /* Something like 1ZET51WW (1.03z) */
328 char *ec_version_str; /* Something like 1ZHT51WW-1.04a */
329
330 u16 bios_model; /* 1Y = 0x5931, 0 = unknown */
331 u16 ec_model;
332 u16 bios_release; /* 1ZETK1WW = 0x314b, 0 = unknown */
333 u16 ec_release;
334
335 char *model_str; /* ThinkPad T43 */
336 char *nummodel_str; /* 9384A9C for a 9384-A9C model */
337 };
338 static struct thinkpad_id_data thinkpad_id;
339
340 static enum {
341 TPACPI_LIFE_INIT = 0,
342 TPACPI_LIFE_RUNNING,
343 TPACPI_LIFE_EXITING,
344 } tpacpi_lifecycle;
345
346 static int experimental;
347 static u32 dbg_level;
348
349 static struct workqueue_struct *tpacpi_wq;
350
351 enum led_status_t {
352 TPACPI_LED_OFF = 0,
353 TPACPI_LED_ON,
354 TPACPI_LED_BLINK,
355 };
356
357 /* Special LED class that can defer work */
358 struct tpacpi_led_classdev {
359 struct led_classdev led_classdev;
360 struct work_struct work;
361 enum led_status_t new_state;
362 unsigned int led;
363 };
364
365 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
366 static int dbg_wlswemul;
367 static int tpacpi_wlsw_emulstate;
368 static int dbg_bluetoothemul;
369 static int tpacpi_bluetooth_emulstate;
370 static int dbg_wwanemul;
371 static int tpacpi_wwan_emulstate;
372 static int dbg_uwbemul;
373 static int tpacpi_uwb_emulstate;
374 #endif
375
376
377 /*************************************************************************
378 * Debugging helpers
379 */
380
381 #define dbg_printk(a_dbg_level, format, arg...) \
382 do { if (dbg_level & (a_dbg_level)) \
383 printk(TPACPI_DEBUG "%s: " format, __func__ , ## arg); \
384 } while (0)
385
386 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
387 #define vdbg_printk dbg_printk
388 static const char *str_supported(int is_supported);
389 #else
390 #define vdbg_printk(a_dbg_level, format, arg...) \
391 do { } while (0)
392 #endif
393
394 static void tpacpi_log_usertask(const char * const what)
395 {
396 printk(TPACPI_DEBUG "%s: access by process with PID %d\n",
397 what, task_tgid_vnr(current));
398 }
399
400 #define tpacpi_disclose_usertask(what, format, arg...) \
401 do { \
402 if (unlikely( \
403 (dbg_level & TPACPI_DBG_DISCLOSETASK) && \
404 (tpacpi_lifecycle == TPACPI_LIFE_RUNNING))) { \
405 printk(TPACPI_DEBUG "%s: PID %d: " format, \
406 what, task_tgid_vnr(current), ## arg); \
407 } \
408 } while (0)
409
410 /*
411 * Quirk handling helpers
412 *
413 * ThinkPad IDs and versions seen in the field so far
414 * are two-characters from the set [0-9A-Z], i.e. base 36.
415 *
416 * We use values well outside that range as specials.
417 */
418
419 #define TPACPI_MATCH_ANY 0xffffU
420 #define TPACPI_MATCH_UNKNOWN 0U
421
422 /* TPID('1', 'Y') == 0x5931 */
423 #define TPID(__c1, __c2) (((__c2) << 8) | (__c1))
424
425 #define TPACPI_Q_IBM(__id1, __id2, __quirk) \
426 { .vendor = PCI_VENDOR_ID_IBM, \
427 .bios = TPID(__id1, __id2), \
428 .ec = TPACPI_MATCH_ANY, \
429 .quirks = (__quirk) }
430
431 #define TPACPI_Q_LNV(__id1, __id2, __quirk) \
432 { .vendor = PCI_VENDOR_ID_LENOVO, \
433 .bios = TPID(__id1, __id2), \
434 .ec = TPACPI_MATCH_ANY, \
435 .quirks = (__quirk) }
436
437 #define TPACPI_QEC_LNV(__id1, __id2, __quirk) \
438 { .vendor = PCI_VENDOR_ID_LENOVO, \
439 .bios = TPACPI_MATCH_ANY, \
440 .ec = TPID(__id1, __id2), \
441 .quirks = (__quirk) }
442
443 struct tpacpi_quirk {
444 unsigned int vendor;
445 u16 bios;
446 u16 ec;
447 unsigned long quirks;
448 };
449
450 /**
451 * tpacpi_check_quirks() - search BIOS/EC version on a list
452 * @qlist: array of &struct tpacpi_quirk
453 * @qlist_size: number of elements in @qlist
454 *
455 * Iterates over a quirks list until one is found that matches the
456 * ThinkPad's vendor, BIOS and EC model.
457 *
458 * Returns 0 if nothing matches, otherwise returns the quirks field of
459 * the matching &struct tpacpi_quirk entry.
460 *
461 * The match criteria is: vendor, ec and bios much match.
462 */
463 static unsigned long __init tpacpi_check_quirks(
464 const struct tpacpi_quirk *qlist,
465 unsigned int qlist_size)
466 {
467 while (qlist_size) {
468 if ((qlist->vendor == thinkpad_id.vendor ||
469 qlist->vendor == TPACPI_MATCH_ANY) &&
470 (qlist->bios == thinkpad_id.bios_model ||
471 qlist->bios == TPACPI_MATCH_ANY) &&
472 (qlist->ec == thinkpad_id.ec_model ||
473 qlist->ec == TPACPI_MATCH_ANY))
474 return qlist->quirks;
475
476 qlist_size--;
477 qlist++;
478 }
479 return 0;
480 }
481
482
483 /****************************************************************************
484 ****************************************************************************
485 *
486 * ACPI Helpers and device model
487 *
488 ****************************************************************************
489 ****************************************************************************/
490
491 /*************************************************************************
492 * ACPI basic handles
493 */
494
495 static acpi_handle root_handle;
496
497 #define TPACPI_HANDLE(object, parent, paths...) \
498 static acpi_handle object##_handle; \
499 static acpi_handle *object##_parent = &parent##_handle; \
500 static char *object##_path; \
501 static char *object##_paths[] = { paths }
502
503 TPACPI_HANDLE(ec, root, "\\_SB.PCI0.ISA.EC0", /* 240, 240x */
504 "\\_SB.PCI.ISA.EC", /* 570 */
505 "\\_SB.PCI0.ISA0.EC0", /* 600e/x, 770e, 770x */
506 "\\_SB.PCI0.ISA.EC", /* A21e, A2xm/p, T20-22, X20-21 */
507 "\\_SB.PCI0.AD4S.EC0", /* i1400, R30 */
508 "\\_SB.PCI0.ICH3.EC0", /* R31 */
509 "\\_SB.PCI0.LPC.EC", /* all others */
510 );
511
512 TPACPI_HANDLE(ecrd, ec, "ECRD"); /* 570 */
513 TPACPI_HANDLE(ecwr, ec, "ECWR"); /* 570 */
514
515 TPACPI_HANDLE(cmos, root, "\\UCMS", /* R50, R50e, R50p, R51, */
516 /* T4x, X31, X40 */
517 "\\CMOS", /* A3x, G4x, R32, T23, T30, X22-24, X30 */
518 "\\CMS", /* R40, R40e */
519 ); /* all others */
520
521 TPACPI_HANDLE(hkey, ec, "\\_SB.HKEY", /* 600e/x, 770e, 770x */
522 "^HKEY", /* R30, R31 */
523 "HKEY", /* all others */
524 ); /* 570 */
525
526 TPACPI_HANDLE(vid, root, "\\_SB.PCI.AGP.VGA", /* 570 */
527 "\\_SB.PCI0.AGP0.VID0", /* 600e/x, 770x */
528 "\\_SB.PCI0.VID0", /* 770e */
529 "\\_SB.PCI0.VID", /* A21e, G4x, R50e, X30, X40 */
530 "\\_SB.PCI0.AGP.VID", /* all others */
531 ); /* R30, R31 */
532
533
534 /*************************************************************************
535 * ACPI helpers
536 */
537
538 static int acpi_evalf(acpi_handle handle,
539 void *res, char *method, char *fmt, ...)
540 {
541 char *fmt0 = fmt;
542 struct acpi_object_list params;
543 union acpi_object in_objs[TPACPI_MAX_ACPI_ARGS];
544 struct acpi_buffer result, *resultp;
545 union acpi_object out_obj;
546 acpi_status status;
547 va_list ap;
548 char res_type;
549 int success;
550 int quiet;
551
552 if (!*fmt) {
553 printk(TPACPI_ERR "acpi_evalf() called with empty format\n");
554 return 0;
555 }
556
557 if (*fmt == 'q') {
558 quiet = 1;
559 fmt++;
560 } else
561 quiet = 0;
562
563 res_type = *(fmt++);
564
565 params.count = 0;
566 params.pointer = &in_objs[0];
567
568 va_start(ap, fmt);
569 while (*fmt) {
570 char c = *(fmt++);
571 switch (c) {
572 case 'd': /* int */
573 in_objs[params.count].integer.value = va_arg(ap, int);
574 in_objs[params.count++].type = ACPI_TYPE_INTEGER;
575 break;
576 /* add more types as needed */
577 default:
578 printk(TPACPI_ERR "acpi_evalf() called "
579 "with invalid format character '%c'\n", c);
580 return 0;
581 }
582 }
583 va_end(ap);
584
585 if (res_type != 'v') {
586 result.length = sizeof(out_obj);
587 result.pointer = &out_obj;
588 resultp = &result;
589 } else
590 resultp = NULL;
591
592 status = acpi_evaluate_object(handle, method, &params, resultp);
593
594 switch (res_type) {
595 case 'd': /* int */
596 if (res)
597 *(int *)res = out_obj.integer.value;
598 success = status == AE_OK && out_obj.type == ACPI_TYPE_INTEGER;
599 break;
600 case 'v': /* void */
601 success = status == AE_OK;
602 break;
603 /* add more types as needed */
604 default:
605 printk(TPACPI_ERR "acpi_evalf() called "
606 "with invalid format character '%c'\n", res_type);
607 return 0;
608 }
609
610 if (!success && !quiet)
611 printk(TPACPI_ERR "acpi_evalf(%s, %s, ...) failed: %d\n",
612 method, fmt0, status);
613
614 return success;
615 }
616
617 static int acpi_ec_read(int i, u8 *p)
618 {
619 int v;
620
621 if (ecrd_handle) {
622 if (!acpi_evalf(ecrd_handle, &v, NULL, "dd", i))
623 return 0;
624 *p = v;
625 } else {
626 if (ec_read(i, p) < 0)
627 return 0;
628 }
629
630 return 1;
631 }
632
633 static int acpi_ec_write(int i, u8 v)
634 {
635 if (ecwr_handle) {
636 if (!acpi_evalf(ecwr_handle, NULL, NULL, "vdd", i, v))
637 return 0;
638 } else {
639 if (ec_write(i, v) < 0)
640 return 0;
641 }
642
643 return 1;
644 }
645
646 static int issue_thinkpad_cmos_command(int cmos_cmd)
647 {
648 if (!cmos_handle)
649 return -ENXIO;
650
651 if (!acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd))
652 return -EIO;
653
654 return 0;
655 }
656
657 /*************************************************************************
658 * ACPI device model
659 */
660
661 #define TPACPI_ACPIHANDLE_INIT(object) \
662 drv_acpi_handle_init(#object, &object##_handle, *object##_parent, \
663 object##_paths, ARRAY_SIZE(object##_paths), &object##_path)
664
665 static void drv_acpi_handle_init(char *name,
666 acpi_handle *handle, acpi_handle parent,
667 char **paths, int num_paths, char **path)
668 {
669 int i;
670 acpi_status status;
671
672 vdbg_printk(TPACPI_DBG_INIT, "trying to locate ACPI handle for %s\n",
673 name);
674
675 for (i = 0; i < num_paths; i++) {
676 status = acpi_get_handle(parent, paths[i], handle);
677 if (ACPI_SUCCESS(status)) {
678 *path = paths[i];
679 dbg_printk(TPACPI_DBG_INIT,
680 "Found ACPI handle %s for %s\n",
681 *path, name);
682 return;
683 }
684 }
685
686 vdbg_printk(TPACPI_DBG_INIT, "ACPI handle for %s not found\n",
687 name);
688 *handle = NULL;
689 }
690
691 static void dispatch_acpi_notify(acpi_handle handle, u32 event, void *data)
692 {
693 struct ibm_struct *ibm = data;
694
695 if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
696 return;
697
698 if (!ibm || !ibm->acpi || !ibm->acpi->notify)
699 return;
700
701 ibm->acpi->notify(ibm, event);
702 }
703
704 static int __init setup_acpi_notify(struct ibm_struct *ibm)
705 {
706 acpi_status status;
707 int rc;
708
709 BUG_ON(!ibm->acpi);
710
711 if (!*ibm->acpi->handle)
712 return 0;
713
714 vdbg_printk(TPACPI_DBG_INIT,
715 "setting up ACPI notify for %s\n", ibm->name);
716
717 rc = acpi_bus_get_device(*ibm->acpi->handle, &ibm->acpi->device);
718 if (rc < 0) {
719 printk(TPACPI_ERR "acpi_bus_get_device(%s) failed: %d\n",
720 ibm->name, rc);
721 return -ENODEV;
722 }
723
724 ibm->acpi->device->driver_data = ibm;
725 sprintf(acpi_device_class(ibm->acpi->device), "%s/%s",
726 TPACPI_ACPI_EVENT_PREFIX,
727 ibm->name);
728
729 status = acpi_install_notify_handler(*ibm->acpi->handle,
730 ibm->acpi->type, dispatch_acpi_notify, ibm);
731 if (ACPI_FAILURE(status)) {
732 if (status == AE_ALREADY_EXISTS) {
733 printk(TPACPI_NOTICE
734 "another device driver is already "
735 "handling %s events\n", ibm->name);
736 } else {
737 printk(TPACPI_ERR
738 "acpi_install_notify_handler(%s) failed: %d\n",
739 ibm->name, status);
740 }
741 return -ENODEV;
742 }
743 ibm->flags.acpi_notify_installed = 1;
744 return 0;
745 }
746
747 static int __init tpacpi_device_add(struct acpi_device *device)
748 {
749 return 0;
750 }
751
752 static int __init register_tpacpi_subdriver(struct ibm_struct *ibm)
753 {
754 int rc;
755
756 dbg_printk(TPACPI_DBG_INIT,
757 "registering %s as an ACPI driver\n", ibm->name);
758
759 BUG_ON(!ibm->acpi);
760
761 ibm->acpi->driver = kzalloc(sizeof(struct acpi_driver), GFP_KERNEL);
762 if (!ibm->acpi->driver) {
763 printk(TPACPI_ERR
764 "failed to allocate memory for ibm->acpi->driver\n");
765 return -ENOMEM;
766 }
767
768 sprintf(ibm->acpi->driver->name, "%s_%s", TPACPI_NAME, ibm->name);
769 ibm->acpi->driver->ids = ibm->acpi->hid;
770
771 ibm->acpi->driver->ops.add = &tpacpi_device_add;
772
773 rc = acpi_bus_register_driver(ibm->acpi->driver);
774 if (rc < 0) {
775 printk(TPACPI_ERR "acpi_bus_register_driver(%s) failed: %d\n",
776 ibm->name, rc);
777 kfree(ibm->acpi->driver);
778 ibm->acpi->driver = NULL;
779 } else if (!rc)
780 ibm->flags.acpi_driver_registered = 1;
781
782 return rc;
783 }
784
785
786 /****************************************************************************
787 ****************************************************************************
788 *
789 * Procfs Helpers
790 *
791 ****************************************************************************
792 ****************************************************************************/
793
794 static int dispatch_proc_show(struct seq_file *m, void *v)
795 {
796 struct ibm_struct *ibm = m->private;
797
798 if (!ibm || !ibm->read)
799 return -EINVAL;
800 return ibm->read(m);
801 }
802
803 static int dispatch_proc_open(struct inode *inode, struct file *file)
804 {
805 return single_open(file, dispatch_proc_show, PDE(inode)->data);
806 }
807
808 static ssize_t dispatch_proc_write(struct file *file,
809 const char __user *userbuf,
810 size_t count, loff_t *pos)
811 {
812 struct ibm_struct *ibm = PDE(file->f_path.dentry->d_inode)->data;
813 char *kernbuf;
814 int ret;
815
816 if (!ibm || !ibm->write)
817 return -EINVAL;
818 if (count > PAGE_SIZE - 2)
819 return -EINVAL;
820
821 kernbuf = kmalloc(count + 2, GFP_KERNEL);
822 if (!kernbuf)
823 return -ENOMEM;
824
825 if (copy_from_user(kernbuf, userbuf, count)) {
826 kfree(kernbuf);
827 return -EFAULT;
828 }
829
830 kernbuf[count] = 0;
831 strcat(kernbuf, ",");
832 ret = ibm->write(kernbuf);
833 if (ret == 0)
834 ret = count;
835
836 kfree(kernbuf);
837
838 return ret;
839 }
840
841 static const struct file_operations dispatch_proc_fops = {
842 .owner = THIS_MODULE,
843 .open = dispatch_proc_open,
844 .read = seq_read,
845 .llseek = seq_lseek,
846 .release = single_release,
847 .write = dispatch_proc_write,
848 };
849
850 static char *next_cmd(char **cmds)
851 {
852 char *start = *cmds;
853 char *end;
854
855 while ((end = strchr(start, ',')) && end == start)
856 start = end + 1;
857
858 if (!end)
859 return NULL;
860
861 *end = 0;
862 *cmds = end + 1;
863 return start;
864 }
865
866
867 /****************************************************************************
868 ****************************************************************************
869 *
870 * Device model: input, hwmon and platform
871 *
872 ****************************************************************************
873 ****************************************************************************/
874
875 static struct platform_device *tpacpi_pdev;
876 static struct platform_device *tpacpi_sensors_pdev;
877 static struct device *tpacpi_hwmon;
878 static struct input_dev *tpacpi_inputdev;
879 static struct mutex tpacpi_inputdev_send_mutex;
880 static LIST_HEAD(tpacpi_all_drivers);
881
882 static int tpacpi_suspend_handler(struct platform_device *pdev,
883 pm_message_t state)
884 {
885 struct ibm_struct *ibm, *itmp;
886
887 list_for_each_entry_safe(ibm, itmp,
888 &tpacpi_all_drivers,
889 all_drivers) {
890 if (ibm->suspend)
891 (ibm->suspend)(state);
892 }
893
894 return 0;
895 }
896
897 static int tpacpi_resume_handler(struct platform_device *pdev)
898 {
899 struct ibm_struct *ibm, *itmp;
900
901 list_for_each_entry_safe(ibm, itmp,
902 &tpacpi_all_drivers,
903 all_drivers) {
904 if (ibm->resume)
905 (ibm->resume)();
906 }
907
908 return 0;
909 }
910
911 static void tpacpi_shutdown_handler(struct platform_device *pdev)
912 {
913 struct ibm_struct *ibm, *itmp;
914
915 list_for_each_entry_safe(ibm, itmp,
916 &tpacpi_all_drivers,
917 all_drivers) {
918 if (ibm->shutdown)
919 (ibm->shutdown)();
920 }
921 }
922
923 static struct platform_driver tpacpi_pdriver = {
924 .driver = {
925 .name = TPACPI_DRVR_NAME,
926 .owner = THIS_MODULE,
927 },
928 .suspend = tpacpi_suspend_handler,
929 .resume = tpacpi_resume_handler,
930 .shutdown = tpacpi_shutdown_handler,
931 };
932
933 static struct platform_driver tpacpi_hwmon_pdriver = {
934 .driver = {
935 .name = TPACPI_HWMON_DRVR_NAME,
936 .owner = THIS_MODULE,
937 },
938 };
939
940 /*************************************************************************
941 * sysfs support helpers
942 */
943
944 struct attribute_set {
945 unsigned int members, max_members;
946 struct attribute_group group;
947 };
948
949 struct attribute_set_obj {
950 struct attribute_set s;
951 struct attribute *a;
952 } __attribute__((packed));
953
954 static struct attribute_set *create_attr_set(unsigned int max_members,
955 const char *name)
956 {
957 struct attribute_set_obj *sobj;
958
959 if (max_members == 0)
960 return NULL;
961
962 /* Allocates space for implicit NULL at the end too */
963 sobj = kzalloc(sizeof(struct attribute_set_obj) +
964 max_members * sizeof(struct attribute *),
965 GFP_KERNEL);
966 if (!sobj)
967 return NULL;
968 sobj->s.max_members = max_members;
969 sobj->s.group.attrs = &sobj->a;
970 sobj->s.group.name = name;
971
972 return &sobj->s;
973 }
974
975 #define destroy_attr_set(_set) \
976 kfree(_set);
977
978 /* not multi-threaded safe, use it in a single thread per set */
979 static int add_to_attr_set(struct attribute_set *s, struct attribute *attr)
980 {
981 if (!s || !attr)
982 return -EINVAL;
983
984 if (s->members >= s->max_members)
985 return -ENOMEM;
986
987 s->group.attrs[s->members] = attr;
988 s->members++;
989
990 return 0;
991 }
992
993 static int add_many_to_attr_set(struct attribute_set *s,
994 struct attribute **attr,
995 unsigned int count)
996 {
997 int i, res;
998
999 for (i = 0; i < count; i++) {
1000 res = add_to_attr_set(s, attr[i]);
1001 if (res)
1002 return res;
1003 }
1004
1005 return 0;
1006 }
1007
1008 static void delete_attr_set(struct attribute_set *s, struct kobject *kobj)
1009 {
1010 sysfs_remove_group(kobj, &s->group);
1011 destroy_attr_set(s);
1012 }
1013
1014 #define register_attr_set_with_sysfs(_attr_set, _kobj) \
1015 sysfs_create_group(_kobj, &_attr_set->group)
1016
1017 static int parse_strtoul(const char *buf,
1018 unsigned long max, unsigned long *value)
1019 {
1020 char *endp;
1021
1022 *value = simple_strtoul(skip_spaces(buf), &endp, 0);
1023 endp = skip_spaces(endp);
1024 if (*endp || *value > max)
1025 return -EINVAL;
1026
1027 return 0;
1028 }
1029
1030 static void tpacpi_disable_brightness_delay(void)
1031 {
1032 if (acpi_evalf(hkey_handle, NULL, "PWMS", "qvd", 0))
1033 printk(TPACPI_NOTICE
1034 "ACPI backlight control delay disabled\n");
1035 }
1036
1037 static int __init tpacpi_query_bcl_levels(acpi_handle handle)
1038 {
1039 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
1040 union acpi_object *obj;
1041 int rc;
1042
1043 if (ACPI_SUCCESS(acpi_evaluate_object(handle, NULL, NULL, &buffer))) {
1044 obj = (union acpi_object *)buffer.pointer;
1045 if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) {
1046 printk(TPACPI_ERR "Unknown _BCL data, "
1047 "please report this to %s\n", TPACPI_MAIL);
1048 rc = 0;
1049 } else {
1050 rc = obj->package.count;
1051 }
1052 } else {
1053 return 0;
1054 }
1055
1056 kfree(buffer.pointer);
1057 return rc;
1058 }
1059
1060 static acpi_status __init tpacpi_acpi_walk_find_bcl(acpi_handle handle,
1061 u32 lvl, void *context, void **rv)
1062 {
1063 char name[ACPI_PATH_SEGMENT_LENGTH];
1064 struct acpi_buffer buffer = { sizeof(name), &name };
1065
1066 if (ACPI_SUCCESS(acpi_get_name(handle, ACPI_SINGLE_NAME, &buffer)) &&
1067 !strncmp("_BCL", name, sizeof(name) - 1)) {
1068 BUG_ON(!rv || !*rv);
1069 **(int **)rv = tpacpi_query_bcl_levels(handle);
1070 return AE_CTRL_TERMINATE;
1071 } else {
1072 return AE_OK;
1073 }
1074 }
1075
1076 /*
1077 * Returns 0 (no ACPI _BCL or _BCL invalid), or size of brightness map
1078 */
1079 static int __init tpacpi_check_std_acpi_brightness_support(void)
1080 {
1081 int status;
1082 int bcl_levels = 0;
1083 void *bcl_ptr = &bcl_levels;
1084
1085 if (!vid_handle) {
1086 TPACPI_ACPIHANDLE_INIT(vid);
1087 }
1088 if (!vid_handle)
1089 return 0;
1090
1091 /*
1092 * Search for a _BCL method, and execute it. This is safe on all
1093 * ThinkPads, and as a side-effect, _BCL will place a Lenovo Vista
1094 * BIOS in ACPI backlight control mode. We do NOT have to care
1095 * about calling the _BCL method in an enabled video device, any
1096 * will do for our purposes.
1097 */
1098
1099 status = acpi_walk_namespace(ACPI_TYPE_METHOD, vid_handle, 3,
1100 tpacpi_acpi_walk_find_bcl, NULL, NULL,
1101 &bcl_ptr);
1102
1103 if (ACPI_SUCCESS(status) && bcl_levels > 2) {
1104 tp_features.bright_acpimode = 1;
1105 return (bcl_levels - 2);
1106 }
1107
1108 return 0;
1109 }
1110
1111 static void printk_deprecated_attribute(const char * const what,
1112 const char * const details)
1113 {
1114 tpacpi_log_usertask("deprecated sysfs attribute");
1115 printk(TPACPI_WARN "WARNING: sysfs attribute %s is deprecated and "
1116 "will be removed. %s\n",
1117 what, details);
1118 }
1119
1120 /*************************************************************************
1121 * rfkill and radio control support helpers
1122 */
1123
1124 /*
1125 * ThinkPad-ACPI firmware handling model:
1126 *
1127 * WLSW (master wireless switch) is event-driven, and is common to all
1128 * firmware-controlled radios. It cannot be controlled, just monitored,
1129 * as expected. It overrides all radio state in firmware
1130 *
1131 * The kernel, a masked-off hotkey, and WLSW can change the radio state
1132 * (TODO: verify how WLSW interacts with the returned radio state).
1133 *
1134 * The only time there are shadow radio state changes, is when
1135 * masked-off hotkeys are used.
1136 */
1137
1138 /*
1139 * Internal driver API for radio state:
1140 *
1141 * int: < 0 = error, otherwise enum tpacpi_rfkill_state
1142 * bool: true means radio blocked (off)
1143 */
1144 enum tpacpi_rfkill_state {
1145 TPACPI_RFK_RADIO_OFF = 0,
1146 TPACPI_RFK_RADIO_ON
1147 };
1148
1149 /* rfkill switches */
1150 enum tpacpi_rfk_id {
1151 TPACPI_RFK_BLUETOOTH_SW_ID = 0,
1152 TPACPI_RFK_WWAN_SW_ID,
1153 TPACPI_RFK_UWB_SW_ID,
1154 TPACPI_RFK_SW_MAX
1155 };
1156
1157 static const char *tpacpi_rfkill_names[] = {
1158 [TPACPI_RFK_BLUETOOTH_SW_ID] = "bluetooth",
1159 [TPACPI_RFK_WWAN_SW_ID] = "wwan",
1160 [TPACPI_RFK_UWB_SW_ID] = "uwb",
1161 [TPACPI_RFK_SW_MAX] = NULL
1162 };
1163
1164 /* ThinkPad-ACPI rfkill subdriver */
1165 struct tpacpi_rfk {
1166 struct rfkill *rfkill;
1167 enum tpacpi_rfk_id id;
1168 const struct tpacpi_rfk_ops *ops;
1169 };
1170
1171 struct tpacpi_rfk_ops {
1172 /* firmware interface */
1173 int (*get_status)(void);
1174 int (*set_status)(const enum tpacpi_rfkill_state);
1175 };
1176
1177 static struct tpacpi_rfk *tpacpi_rfkill_switches[TPACPI_RFK_SW_MAX];
1178
1179 /* Query FW and update rfkill sw state for a given rfkill switch */
1180 static int tpacpi_rfk_update_swstate(const struct tpacpi_rfk *tp_rfk)
1181 {
1182 int status;
1183
1184 if (!tp_rfk)
1185 return -ENODEV;
1186
1187 status = (tp_rfk->ops->get_status)();
1188 if (status < 0)
1189 return status;
1190
1191 rfkill_set_sw_state(tp_rfk->rfkill,
1192 (status == TPACPI_RFK_RADIO_OFF));
1193
1194 return status;
1195 }
1196
1197 /* Query FW and update rfkill sw state for all rfkill switches */
1198 static void tpacpi_rfk_update_swstate_all(void)
1199 {
1200 unsigned int i;
1201
1202 for (i = 0; i < TPACPI_RFK_SW_MAX; i++)
1203 tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[i]);
1204 }
1205
1206 /*
1207 * Sync the HW-blocking state of all rfkill switches,
1208 * do notice it causes the rfkill core to schedule uevents
1209 */
1210 static void tpacpi_rfk_update_hwblock_state(bool blocked)
1211 {
1212 unsigned int i;
1213 struct tpacpi_rfk *tp_rfk;
1214
1215 for (i = 0; i < TPACPI_RFK_SW_MAX; i++) {
1216 tp_rfk = tpacpi_rfkill_switches[i];
1217 if (tp_rfk) {
1218 if (rfkill_set_hw_state(tp_rfk->rfkill,
1219 blocked)) {
1220 /* ignore -- we track sw block */
1221 }
1222 }
1223 }
1224 }
1225
1226 /* Call to get the WLSW state from the firmware */
1227 static int hotkey_get_wlsw(void);
1228
1229 /* Call to query WLSW state and update all rfkill switches */
1230 static bool tpacpi_rfk_check_hwblock_state(void)
1231 {
1232 int res = hotkey_get_wlsw();
1233 int hw_blocked;
1234
1235 /* When unknown or unsupported, we have to assume it is unblocked */
1236 if (res < 0)
1237 return false;
1238
1239 hw_blocked = (res == TPACPI_RFK_RADIO_OFF);
1240 tpacpi_rfk_update_hwblock_state(hw_blocked);
1241
1242 return hw_blocked;
1243 }
1244
1245 static int tpacpi_rfk_hook_set_block(void *data, bool blocked)
1246 {
1247 struct tpacpi_rfk *tp_rfk = data;
1248 int res;
1249
1250 dbg_printk(TPACPI_DBG_RFKILL,
1251 "request to change radio state to %s\n",
1252 blocked ? "blocked" : "unblocked");
1253
1254 /* try to set radio state */
1255 res = (tp_rfk->ops->set_status)(blocked ?
1256 TPACPI_RFK_RADIO_OFF : TPACPI_RFK_RADIO_ON);
1257
1258 /* and update the rfkill core with whatever the FW really did */
1259 tpacpi_rfk_update_swstate(tp_rfk);
1260
1261 return (res < 0) ? res : 0;
1262 }
1263
1264 static const struct rfkill_ops tpacpi_rfk_rfkill_ops = {
1265 .set_block = tpacpi_rfk_hook_set_block,
1266 };
1267
1268 static int __init tpacpi_new_rfkill(const enum tpacpi_rfk_id id,
1269 const struct tpacpi_rfk_ops *tp_rfkops,
1270 const enum rfkill_type rfktype,
1271 const char *name,
1272 const bool set_default)
1273 {
1274 struct tpacpi_rfk *atp_rfk;
1275 int res;
1276 bool sw_state = false;
1277 bool hw_state;
1278 int sw_status;
1279
1280 BUG_ON(id >= TPACPI_RFK_SW_MAX || tpacpi_rfkill_switches[id]);
1281
1282 atp_rfk = kzalloc(sizeof(struct tpacpi_rfk), GFP_KERNEL);
1283 if (atp_rfk)
1284 atp_rfk->rfkill = rfkill_alloc(name,
1285 &tpacpi_pdev->dev,
1286 rfktype,
1287 &tpacpi_rfk_rfkill_ops,
1288 atp_rfk);
1289 if (!atp_rfk || !atp_rfk->rfkill) {
1290 printk(TPACPI_ERR
1291 "failed to allocate memory for rfkill class\n");
1292 kfree(atp_rfk);
1293 return -ENOMEM;
1294 }
1295
1296 atp_rfk->id = id;
1297 atp_rfk->ops = tp_rfkops;
1298
1299 sw_status = (tp_rfkops->get_status)();
1300 if (sw_status < 0) {
1301 printk(TPACPI_ERR
1302 "failed to read initial state for %s, error %d\n",
1303 name, sw_status);
1304 } else {
1305 sw_state = (sw_status == TPACPI_RFK_RADIO_OFF);
1306 if (set_default) {
1307 /* try to keep the initial state, since we ask the
1308 * firmware to preserve it across S5 in NVRAM */
1309 rfkill_init_sw_state(atp_rfk->rfkill, sw_state);
1310 }
1311 }
1312 hw_state = tpacpi_rfk_check_hwblock_state();
1313 rfkill_set_hw_state(atp_rfk->rfkill, hw_state);
1314
1315 res = rfkill_register(atp_rfk->rfkill);
1316 if (res < 0) {
1317 printk(TPACPI_ERR
1318 "failed to register %s rfkill switch: %d\n",
1319 name, res);
1320 rfkill_destroy(atp_rfk->rfkill);
1321 kfree(atp_rfk);
1322 return res;
1323 }
1324
1325 tpacpi_rfkill_switches[id] = atp_rfk;
1326
1327 printk(TPACPI_INFO "rfkill switch %s: radio is %sblocked\n",
1328 name, (sw_state || hw_state) ? "" : "un");
1329 return 0;
1330 }
1331
1332 static void tpacpi_destroy_rfkill(const enum tpacpi_rfk_id id)
1333 {
1334 struct tpacpi_rfk *tp_rfk;
1335
1336 BUG_ON(id >= TPACPI_RFK_SW_MAX);
1337
1338 tp_rfk = tpacpi_rfkill_switches[id];
1339 if (tp_rfk) {
1340 rfkill_unregister(tp_rfk->rfkill);
1341 rfkill_destroy(tp_rfk->rfkill);
1342 tpacpi_rfkill_switches[id] = NULL;
1343 kfree(tp_rfk);
1344 }
1345 }
1346
1347 static void printk_deprecated_rfkill_attribute(const char * const what)
1348 {
1349 printk_deprecated_attribute(what,
1350 "Please switch to generic rfkill before year 2010");
1351 }
1352
1353 /* sysfs <radio> enable ------------------------------------------------ */
1354 static ssize_t tpacpi_rfk_sysfs_enable_show(const enum tpacpi_rfk_id id,
1355 struct device_attribute *attr,
1356 char *buf)
1357 {
1358 int status;
1359
1360 printk_deprecated_rfkill_attribute(attr->attr.name);
1361
1362 /* This is in the ABI... */
1363 if (tpacpi_rfk_check_hwblock_state()) {
1364 status = TPACPI_RFK_RADIO_OFF;
1365 } else {
1366 status = tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]);
1367 if (status < 0)
1368 return status;
1369 }
1370
1371 return snprintf(buf, PAGE_SIZE, "%d\n",
1372 (status == TPACPI_RFK_RADIO_ON) ? 1 : 0);
1373 }
1374
1375 static ssize_t tpacpi_rfk_sysfs_enable_store(const enum tpacpi_rfk_id id,
1376 struct device_attribute *attr,
1377 const char *buf, size_t count)
1378 {
1379 unsigned long t;
1380 int res;
1381
1382 printk_deprecated_rfkill_attribute(attr->attr.name);
1383
1384 if (parse_strtoul(buf, 1, &t))
1385 return -EINVAL;
1386
1387 tpacpi_disclose_usertask(attr->attr.name, "set to %ld\n", t);
1388
1389 /* This is in the ABI... */
1390 if (tpacpi_rfk_check_hwblock_state() && !!t)
1391 return -EPERM;
1392
1393 res = tpacpi_rfkill_switches[id]->ops->set_status((!!t) ?
1394 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF);
1395 tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]);
1396
1397 return (res < 0) ? res : count;
1398 }
1399
1400 /* procfs -------------------------------------------------------------- */
1401 static int tpacpi_rfk_procfs_read(const enum tpacpi_rfk_id id, struct seq_file *m)
1402 {
1403 if (id >= TPACPI_RFK_SW_MAX)
1404 seq_printf(m, "status:\t\tnot supported\n");
1405 else {
1406 int status;
1407
1408 /* This is in the ABI... */
1409 if (tpacpi_rfk_check_hwblock_state()) {
1410 status = TPACPI_RFK_RADIO_OFF;
1411 } else {
1412 status = tpacpi_rfk_update_swstate(
1413 tpacpi_rfkill_switches[id]);
1414 if (status < 0)
1415 return status;
1416 }
1417
1418 seq_printf(m, "status:\t\t%s\n",
1419 (status == TPACPI_RFK_RADIO_ON) ?
1420 "enabled" : "disabled");
1421 seq_printf(m, "commands:\tenable, disable\n");
1422 }
1423
1424 return 0;
1425 }
1426
1427 static int tpacpi_rfk_procfs_write(const enum tpacpi_rfk_id id, char *buf)
1428 {
1429 char *cmd;
1430 int status = -1;
1431 int res = 0;
1432
1433 if (id >= TPACPI_RFK_SW_MAX)
1434 return -ENODEV;
1435
1436 while ((cmd = next_cmd(&buf))) {
1437 if (strlencmp(cmd, "enable") == 0)
1438 status = TPACPI_RFK_RADIO_ON;
1439 else if (strlencmp(cmd, "disable") == 0)
1440 status = TPACPI_RFK_RADIO_OFF;
1441 else
1442 return -EINVAL;
1443 }
1444
1445 if (status != -1) {
1446 tpacpi_disclose_usertask("procfs", "attempt to %s %s\n",
1447 (status == TPACPI_RFK_RADIO_ON) ?
1448 "enable" : "disable",
1449 tpacpi_rfkill_names[id]);
1450 res = (tpacpi_rfkill_switches[id]->ops->set_status)(status);
1451 tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]);
1452 }
1453
1454 return res;
1455 }
1456
1457 /*************************************************************************
1458 * thinkpad-acpi driver attributes
1459 */
1460
1461 /* interface_version --------------------------------------------------- */
1462 static ssize_t tpacpi_driver_interface_version_show(
1463 struct device_driver *drv,
1464 char *buf)
1465 {
1466 return snprintf(buf, PAGE_SIZE, "0x%08x\n", TPACPI_SYSFS_VERSION);
1467 }
1468
1469 static DRIVER_ATTR(interface_version, S_IRUGO,
1470 tpacpi_driver_interface_version_show, NULL);
1471
1472 /* debug_level --------------------------------------------------------- */
1473 static ssize_t tpacpi_driver_debug_show(struct device_driver *drv,
1474 char *buf)
1475 {
1476 return snprintf(buf, PAGE_SIZE, "0x%04x\n", dbg_level);
1477 }
1478
1479 static ssize_t tpacpi_driver_debug_store(struct device_driver *drv,
1480 const char *buf, size_t count)
1481 {
1482 unsigned long t;
1483
1484 if (parse_strtoul(buf, 0xffff, &t))
1485 return -EINVAL;
1486
1487 dbg_level = t;
1488
1489 return count;
1490 }
1491
1492 static DRIVER_ATTR(debug_level, S_IWUSR | S_IRUGO,
1493 tpacpi_driver_debug_show, tpacpi_driver_debug_store);
1494
1495 /* version ------------------------------------------------------------- */
1496 static ssize_t tpacpi_driver_version_show(struct device_driver *drv,
1497 char *buf)
1498 {
1499 return snprintf(buf, PAGE_SIZE, "%s v%s\n",
1500 TPACPI_DESC, TPACPI_VERSION);
1501 }
1502
1503 static DRIVER_ATTR(version, S_IRUGO,
1504 tpacpi_driver_version_show, NULL);
1505
1506 /* --------------------------------------------------------------------- */
1507
1508 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
1509
1510 /* wlsw_emulstate ------------------------------------------------------ */
1511 static ssize_t tpacpi_driver_wlsw_emulstate_show(struct device_driver *drv,
1512 char *buf)
1513 {
1514 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_wlsw_emulstate);
1515 }
1516
1517 static ssize_t tpacpi_driver_wlsw_emulstate_store(struct device_driver *drv,
1518 const char *buf, size_t count)
1519 {
1520 unsigned long t;
1521
1522 if (parse_strtoul(buf, 1, &t))
1523 return -EINVAL;
1524
1525 if (tpacpi_wlsw_emulstate != !!t) {
1526 tpacpi_wlsw_emulstate = !!t;
1527 tpacpi_rfk_update_hwblock_state(!t); /* negative logic */
1528 }
1529
1530 return count;
1531 }
1532
1533 static DRIVER_ATTR(wlsw_emulstate, S_IWUSR | S_IRUGO,
1534 tpacpi_driver_wlsw_emulstate_show,
1535 tpacpi_driver_wlsw_emulstate_store);
1536
1537 /* bluetooth_emulstate ------------------------------------------------- */
1538 static ssize_t tpacpi_driver_bluetooth_emulstate_show(
1539 struct device_driver *drv,
1540 char *buf)
1541 {
1542 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_bluetooth_emulstate);
1543 }
1544
1545 static ssize_t tpacpi_driver_bluetooth_emulstate_store(
1546 struct device_driver *drv,
1547 const char *buf, size_t count)
1548 {
1549 unsigned long t;
1550
1551 if (parse_strtoul(buf, 1, &t))
1552 return -EINVAL;
1553
1554 tpacpi_bluetooth_emulstate = !!t;
1555
1556 return count;
1557 }
1558
1559 static DRIVER_ATTR(bluetooth_emulstate, S_IWUSR | S_IRUGO,
1560 tpacpi_driver_bluetooth_emulstate_show,
1561 tpacpi_driver_bluetooth_emulstate_store);
1562
1563 /* wwan_emulstate ------------------------------------------------- */
1564 static ssize_t tpacpi_driver_wwan_emulstate_show(
1565 struct device_driver *drv,
1566 char *buf)
1567 {
1568 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_wwan_emulstate);
1569 }
1570
1571 static ssize_t tpacpi_driver_wwan_emulstate_store(
1572 struct device_driver *drv,
1573 const char *buf, size_t count)
1574 {
1575 unsigned long t;
1576
1577 if (parse_strtoul(buf, 1, &t))
1578 return -EINVAL;
1579
1580 tpacpi_wwan_emulstate = !!t;
1581
1582 return count;
1583 }
1584
1585 static DRIVER_ATTR(wwan_emulstate, S_IWUSR | S_IRUGO,
1586 tpacpi_driver_wwan_emulstate_show,
1587 tpacpi_driver_wwan_emulstate_store);
1588
1589 /* uwb_emulstate ------------------------------------------------- */
1590 static ssize_t tpacpi_driver_uwb_emulstate_show(
1591 struct device_driver *drv,
1592 char *buf)
1593 {
1594 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_uwb_emulstate);
1595 }
1596
1597 static ssize_t tpacpi_driver_uwb_emulstate_store(
1598 struct device_driver *drv,
1599 const char *buf, size_t count)
1600 {
1601 unsigned long t;
1602
1603 if (parse_strtoul(buf, 1, &t))
1604 return -EINVAL;
1605
1606 tpacpi_uwb_emulstate = !!t;
1607
1608 return count;
1609 }
1610
1611 static DRIVER_ATTR(uwb_emulstate, S_IWUSR | S_IRUGO,
1612 tpacpi_driver_uwb_emulstate_show,
1613 tpacpi_driver_uwb_emulstate_store);
1614 #endif
1615
1616 /* --------------------------------------------------------------------- */
1617
1618 static struct driver_attribute *tpacpi_driver_attributes[] = {
1619 &driver_attr_debug_level, &driver_attr_version,
1620 &driver_attr_interface_version,
1621 };
1622
1623 static int __init tpacpi_create_driver_attributes(struct device_driver *drv)
1624 {
1625 int i, res;
1626
1627 i = 0;
1628 res = 0;
1629 while (!res && i < ARRAY_SIZE(tpacpi_driver_attributes)) {
1630 res = driver_create_file(drv, tpacpi_driver_attributes[i]);
1631 i++;
1632 }
1633
1634 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
1635 if (!res && dbg_wlswemul)
1636 res = driver_create_file(drv, &driver_attr_wlsw_emulstate);
1637 if (!res && dbg_bluetoothemul)
1638 res = driver_create_file(drv, &driver_attr_bluetooth_emulstate);
1639 if (!res && dbg_wwanemul)
1640 res = driver_create_file(drv, &driver_attr_wwan_emulstate);
1641 if (!res && dbg_uwbemul)
1642 res = driver_create_file(drv, &driver_attr_uwb_emulstate);
1643 #endif
1644
1645 return res;
1646 }
1647
1648 static void tpacpi_remove_driver_attributes(struct device_driver *drv)
1649 {
1650 int i;
1651
1652 for (i = 0; i < ARRAY_SIZE(tpacpi_driver_attributes); i++)
1653 driver_remove_file(drv, tpacpi_driver_attributes[i]);
1654
1655 #ifdef THINKPAD_ACPI_DEBUGFACILITIES
1656 driver_remove_file(drv, &driver_attr_wlsw_emulstate);
1657 driver_remove_file(drv, &driver_attr_bluetooth_emulstate);
1658 driver_remove_file(drv, &driver_attr_wwan_emulstate);
1659 driver_remove_file(drv, &driver_attr_uwb_emulstate);
1660 #endif
1661 }
1662
1663 /*************************************************************************
1664 * Firmware Data
1665 */
1666
1667 /*
1668 * Table of recommended minimum BIOS versions
1669 *
1670 * Reasons for listing:
1671 * 1. Stable BIOS, listed because the unknown ammount of
1672 * bugs and bad ACPI behaviour on older versions
1673 *
1674 * 2. BIOS or EC fw with known bugs that trigger on Linux
1675 *
1676 * 3. BIOS with known reduced functionality in older versions
1677 *
1678 * We recommend the latest BIOS and EC version.
1679 * We only support the latest BIOS and EC fw version as a rule.
1680 *
1681 * Sources: IBM ThinkPad Public Web Documents (update changelogs),
1682 * Information from users in ThinkWiki
1683 *
1684 * WARNING: we use this table also to detect that the machine is
1685 * a ThinkPad in some cases, so don't remove entries lightly.
1686 */
1687
1688 #define TPV_Q(__v, __id1, __id2, __bv1, __bv2) \
1689 { .vendor = (__v), \
1690 .bios = TPID(__id1, __id2), \
1691 .ec = TPACPI_MATCH_ANY, \
1692 .quirks = TPACPI_MATCH_ANY << 16 \
1693 | (__bv1) << 8 | (__bv2) }
1694
1695 #define TPV_Q_X(__v, __bid1, __bid2, __bv1, __bv2, \
1696 __eid, __ev1, __ev2) \
1697 { .vendor = (__v), \
1698 .bios = TPID(__bid1, __bid2), \
1699 .ec = __eid, \
1700 .quirks = (__ev1) << 24 | (__ev2) << 16 \
1701 | (__bv1) << 8 | (__bv2) }
1702
1703 #define TPV_QI0(__id1, __id2, __bv1, __bv2) \
1704 TPV_Q(PCI_VENDOR_ID_IBM, __id1, __id2, __bv1, __bv2)
1705
1706 /* Outdated IBM BIOSes often lack the EC id string */
1707 #define TPV_QI1(__id1, __id2, __bv1, __bv2, __ev1, __ev2) \
1708 TPV_Q_X(PCI_VENDOR_ID_IBM, __id1, __id2, \
1709 __bv1, __bv2, TPID(__id1, __id2), \
1710 __ev1, __ev2), \
1711 TPV_Q_X(PCI_VENDOR_ID_IBM, __id1, __id2, \
1712 __bv1, __bv2, TPACPI_MATCH_UNKNOWN, \
1713 __ev1, __ev2)
1714
1715 /* Outdated IBM BIOSes often lack the EC id string */
1716 #define TPV_QI2(__bid1, __bid2, __bv1, __bv2, \
1717 __eid1, __eid2, __ev1, __ev2) \
1718 TPV_Q_X(PCI_VENDOR_ID_IBM, __bid1, __bid2, \
1719 __bv1, __bv2, TPID(__eid1, __eid2), \
1720 __ev1, __ev2), \
1721 TPV_Q_X(PCI_VENDOR_ID_IBM, __bid1, __bid2, \
1722 __bv1, __bv2, TPACPI_MATCH_UNKNOWN, \
1723 __ev1, __ev2)
1724
1725 #define TPV_QL0(__id1, __id2, __bv1, __bv2) \
1726 TPV_Q(PCI_VENDOR_ID_LENOVO, __id1, __id2, __bv1, __bv2)
1727
1728 #define TPV_QL1(__id1, __id2, __bv1, __bv2, __ev1, __ev2) \
1729 TPV_Q_X(PCI_VENDOR_ID_LENOVO, __id1, __id2, \
1730 __bv1, __bv2, TPID(__id1, __id2), \
1731 __ev1, __ev2)
1732
1733 #define TPV_QL2(__bid1, __bid2, __bv1, __bv2, \
1734 __eid1, __eid2, __ev1, __ev2) \
1735 TPV_Q_X(PCI_VENDOR_ID_LENOVO, __bid1, __bid2, \
1736 __bv1, __bv2, TPID(__eid1, __eid2), \
1737 __ev1, __ev2)
1738
1739 static const struct tpacpi_quirk tpacpi_bios_version_qtable[] __initconst = {
1740 /* Numeric models ------------------ */
1741 /* FW MODEL BIOS VERS */
1742 TPV_QI0('I', 'M', '6', '5'), /* 570 */
1743 TPV_QI0('I', 'U', '2', '6'), /* 570E */
1744 TPV_QI0('I', 'B', '5', '4'), /* 600 */
1745 TPV_QI0('I', 'H', '4', '7'), /* 600E */
1746 TPV_QI0('I', 'N', '3', '6'), /* 600E */
1747 TPV_QI0('I', 'T', '5', '5'), /* 600X */
1748 TPV_QI0('I', 'D', '4', '8'), /* 770, 770E, 770ED */
1749 TPV_QI0('I', 'I', '4', '2'), /* 770X */
1750 TPV_QI0('I', 'O', '2', '3'), /* 770Z */
1751
1752 /* A-series ------------------------- */
1753 /* FW MODEL BIOS VERS EC VERS */
1754 TPV_QI0('I', 'W', '5', '9'), /* A20m */
1755 TPV_QI0('I', 'V', '6', '9'), /* A20p */
1756 TPV_QI0('1', '0', '2', '6'), /* A21e, A22e */
1757 TPV_QI0('K', 'U', '3', '6'), /* A21e */
1758 TPV_QI0('K', 'X', '3', '6'), /* A21m, A22m */
1759 TPV_QI0('K', 'Y', '3', '8'), /* A21p, A22p */
1760 TPV_QI0('1', 'B', '1', '7'), /* A22e */
1761 TPV_QI0('1', '3', '2', '0'), /* A22m */
1762 TPV_QI0('1', 'E', '7', '3'), /* A30/p (0) */
1763 TPV_QI1('1', 'G', '4', '1', '1', '7'), /* A31/p (0) */
1764 TPV_QI1('1', 'N', '1', '6', '0', '7'), /* A31/p (0) */
1765
1766 /* G-series ------------------------- */
1767 /* FW MODEL BIOS VERS */
1768 TPV_QI0('1', 'T', 'A', '6'), /* G40 */
1769 TPV_QI0('1', 'X', '5', '7'), /* G41 */
1770
1771 /* R-series, T-series --------------- */
1772 /* FW MODEL BIOS VERS EC VERS */
1773 TPV_QI0('1', 'C', 'F', '0'), /* R30 */
1774 TPV_QI0('1', 'F', 'F', '1'), /* R31 */
1775 TPV_QI0('1', 'M', '9', '7'), /* R32 */
1776 TPV_QI0('1', 'O', '6', '1'), /* R40 */
1777 TPV_QI0('1', 'P', '6', '5'), /* R40 */
1778 TPV_QI0('1', 'S', '7', '0'), /* R40e */
1779 TPV_QI1('1', 'R', 'D', 'R', '7', '1'), /* R50/p, R51,
1780 T40/p, T41/p, T42/p (1) */
1781 TPV_QI1('1', 'V', '7', '1', '2', '8'), /* R50e, R51 (1) */
1782 TPV_QI1('7', '8', '7', '1', '0', '6'), /* R51e (1) */
1783 TPV_QI1('7', '6', '6', '9', '1', '6'), /* R52 (1) */
1784 TPV_QI1('7', '0', '6', '9', '2', '8'), /* R52, T43 (1) */
1785
1786 TPV_QI0('I', 'Y', '6', '1'), /* T20 */
1787 TPV_QI0('K', 'Z', '3', '4'), /* T21 */
1788 TPV_QI0('1', '6', '3', '2'), /* T22 */
1789 TPV_QI1('1', 'A', '6', '4', '2', '3'), /* T23 (0) */
1790 TPV_QI1('1', 'I', '7', '1', '2', '0'), /* T30 (0) */
1791 TPV_QI1('1', 'Y', '6', '5', '2', '9'), /* T43/p (1) */
1792
1793 TPV_QL1('7', '9', 'E', '3', '5', '0'), /* T60/p */
1794 TPV_QL1('7', 'C', 'D', '2', '2', '2'), /* R60, R60i */
1795 TPV_QL1('7', 'E', 'D', '0', '1', '5'), /* R60e, R60i */
1796
1797 /* BIOS FW BIOS VERS EC FW EC VERS */
1798 TPV_QI2('1', 'W', '9', '0', '1', 'V', '2', '8'), /* R50e (1) */
1799 TPV_QL2('7', 'I', '3', '4', '7', '9', '5', '0'), /* T60/p wide */
1800
1801 /* X-series ------------------------- */
1802 /* FW MODEL BIOS VERS EC VERS */
1803 TPV_QI0('I', 'Z', '9', 'D'), /* X20, X21 */
1804 TPV_QI0('1', 'D', '7', '0'), /* X22, X23, X24 */
1805 TPV_QI1('1', 'K', '4', '8', '1', '8'), /* X30 (0) */
1806 TPV_QI1('1', 'Q', '9', '7', '2', '3'), /* X31, X32 (0) */
1807 TPV_QI1('1', 'U', 'D', '3', 'B', '2'), /* X40 (0) */
1808 TPV_QI1('7', '4', '6', '4', '2', '7'), /* X41 (0) */
1809 TPV_QI1('7', '5', '6', '0', '2', '0'), /* X41t (0) */
1810
1811 TPV_QL1('7', 'B', 'D', '7', '4', '0'), /* X60/s */
1812 TPV_QL1('7', 'J', '3', '0', '1', '3'), /* X60t */
1813
1814 /* (0) - older versions lack DMI EC fw string and functionality */
1815 /* (1) - older versions known to lack functionality */
1816 };
1817
1818 #undef TPV_QL1
1819 #undef TPV_QL0
1820 #undef TPV_QI2
1821 #undef TPV_QI1
1822 #undef TPV_QI0
1823 #undef TPV_Q_X
1824 #undef TPV_Q
1825
1826 static void __init tpacpi_check_outdated_fw(void)
1827 {
1828 unsigned long fwvers;
1829 u16 ec_version, bios_version;
1830
1831 fwvers = tpacpi_check_quirks(tpacpi_bios_version_qtable,
1832 ARRAY_SIZE(tpacpi_bios_version_qtable));
1833
1834 if (!fwvers)
1835 return;
1836
1837 bios_version = fwvers & 0xffffU;
1838 ec_version = (fwvers >> 16) & 0xffffU;
1839
1840 /* note that unknown versions are set to 0x0000 and we use that */
1841 if ((bios_version > thinkpad_id.bios_release) ||
1842 (ec_version > thinkpad_id.ec_release &&
1843 ec_version != TPACPI_MATCH_ANY)) {
1844 /*
1845 * The changelogs would let us track down the exact
1846 * reason, but it is just too much of a pain to track
1847 * it. We only list BIOSes that are either really
1848 * broken, or really stable to begin with, so it is
1849 * best if the user upgrades the firmware anyway.
1850 */
1851 printk(TPACPI_WARN
1852 "WARNING: Outdated ThinkPad BIOS/EC firmware\n");
1853 printk(TPACPI_WARN
1854 "WARNING: This firmware may be missing critical bug "
1855 "fixes and/or important features\n");
1856 }
1857 }
1858
1859 static bool __init tpacpi_is_fw_known(void)
1860 {
1861 return tpacpi_check_quirks(tpacpi_bios_version_qtable,
1862 ARRAY_SIZE(tpacpi_bios_version_qtable)) != 0;
1863 }
1864
1865 /****************************************************************************
1866 ****************************************************************************
1867 *
1868 * Subdrivers
1869 *
1870 ****************************************************************************
1871 ****************************************************************************/
1872
1873 /*************************************************************************
1874 * thinkpad-acpi init subdriver
1875 */
1876
1877 static int __init thinkpad_acpi_driver_init(struct ibm_init_struct *iibm)
1878 {
1879 printk(TPACPI_INFO "%s v%s\n", TPACPI_DESC, TPACPI_VERSION);
1880 printk(TPACPI_INFO "%s\n", TPACPI_URL);
1881
1882 printk(TPACPI_INFO "ThinkPad BIOS %s, EC %s\n",
1883 (thinkpad_id.bios_version_str) ?
1884 thinkpad_id.bios_version_str : "unknown",
1885 (thinkpad_id.ec_version_str) ?
1886 thinkpad_id.ec_version_str : "unknown");
1887
1888 if (thinkpad_id.vendor && thinkpad_id.model_str)
1889 printk(TPACPI_INFO "%s %s, model %s\n",
1890 (thinkpad_id.vendor == PCI_VENDOR_ID_IBM) ?
1891 "IBM" : ((thinkpad_id.vendor ==
1892 PCI_VENDOR_ID_LENOVO) ?
1893 "Lenovo" : "Unknown vendor"),
1894 thinkpad_id.model_str,
1895 (thinkpad_id.nummodel_str) ?
1896 thinkpad_id.nummodel_str : "unknown");
1897
1898 tpacpi_check_outdated_fw();
1899 return 0;
1900 }
1901
1902 static int thinkpad_acpi_driver_read(struct seq_file *m)
1903 {
1904 seq_printf(m, "driver:\t\t%s\n", TPACPI_DESC);
1905 seq_printf(m, "version:\t%s\n", TPACPI_VERSION);
1906 return 0;
1907 }
1908
1909 static struct ibm_struct thinkpad_acpi_driver_data = {
1910 .name = "driver",
1911 .read = thinkpad_acpi_driver_read,
1912 };
1913
1914 /*************************************************************************
1915 * Hotkey subdriver
1916 */
1917
1918 /*
1919 * ThinkPad firmware event model
1920 *
1921 * The ThinkPad firmware has two main event interfaces: normal ACPI
1922 * notifications (which follow the ACPI standard), and a private event
1923 * interface.
1924 *
1925 * The private event interface also issues events for the hotkeys. As
1926 * the driver gained features, the event handling code ended up being
1927 * built around the hotkey subdriver. This will need to be refactored
1928 * to a more formal event API eventually.
1929 *
1930 * Some "hotkeys" are actually supposed to be used as event reports,
1931 * such as "brightness has changed", "volume has changed", depending on
1932 * the ThinkPad model and how the firmware is operating.
1933 *
1934 * Unlike other classes, hotkey-class events have mask/unmask control on
1935 * non-ancient firmware. However, how it behaves changes a lot with the
1936 * firmware model and version.
1937 */
1938
1939 enum { /* hot key scan codes (derived from ACPI DSDT) */
1940 TP_ACPI_HOTKEYSCAN_FNF1 = 0,
1941 TP_ACPI_HOTKEYSCAN_FNF2,
1942 TP_ACPI_HOTKEYSCAN_FNF3,
1943 TP_ACPI_HOTKEYSCAN_FNF4,
1944 TP_ACPI_HOTKEYSCAN_FNF5,
1945 TP_ACPI_HOTKEYSCAN_FNF6,
1946 TP_ACPI_HOTKEYSCAN_FNF7,
1947 TP_ACPI_HOTKEYSCAN_FNF8,
1948 TP_ACPI_HOTKEYSCAN_FNF9,
1949 TP_ACPI_HOTKEYSCAN_FNF10,
1950 TP_ACPI_HOTKEYSCAN_FNF11,
1951 TP_ACPI_HOTKEYSCAN_FNF12,
1952 TP_ACPI_HOTKEYSCAN_FNBACKSPACE,
1953 TP_ACPI_HOTKEYSCAN_FNINSERT,
1954 TP_ACPI_HOTKEYSCAN_FNDELETE,
1955 TP_ACPI_HOTKEYSCAN_FNHOME,
1956 TP_ACPI_HOTKEYSCAN_FNEND,
1957 TP_ACPI_HOTKEYSCAN_FNPAGEUP,
1958 TP_ACPI_HOTKEYSCAN_FNPAGEDOWN,
1959 TP_ACPI_HOTKEYSCAN_FNSPACE,
1960 TP_ACPI_HOTKEYSCAN_VOLUMEUP,
1961 TP_ACPI_HOTKEYSCAN_VOLUMEDOWN,
1962 TP_ACPI_HOTKEYSCAN_MUTE,
1963 TP_ACPI_HOTKEYSCAN_THINKPAD,
1964 };
1965
1966 enum { /* Keys/events available through NVRAM polling */
1967 TPACPI_HKEY_NVRAM_KNOWN_MASK = 0x00fb88c0U,
1968 TPACPI_HKEY_NVRAM_GOOD_MASK = 0x00fb8000U,
1969 };
1970
1971 enum { /* Positions of some of the keys in hotkey masks */
1972 TP_ACPI_HKEY_DISPSWTCH_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF7,
1973 TP_ACPI_HKEY_DISPXPAND_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF8,
1974 TP_ACPI_HKEY_HIBERNATE_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF12,
1975 TP_ACPI_HKEY_BRGHTUP_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNHOME,
1976 TP_ACPI_HKEY_BRGHTDWN_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNEND,
1977 TP_ACPI_HKEY_THNKLGHT_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNPAGEUP,
1978 TP_ACPI_HKEY_ZOOM_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNSPACE,
1979 TP_ACPI_HKEY_VOLUP_MASK = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEUP,
1980 TP_ACPI_HKEY_VOLDWN_MASK = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEDOWN,
1981 TP_ACPI_HKEY_MUTE_MASK = 1 << TP_ACPI_HOTKEYSCAN_MUTE,
1982 TP_ACPI_HKEY_THINKPAD_MASK = 1 << TP_ACPI_HOTKEYSCAN_THINKPAD,
1983 };
1984
1985 enum { /* NVRAM to ACPI HKEY group map */
1986 TP_NVRAM_HKEY_GROUP_HK2 = TP_ACPI_HKEY_THINKPAD_MASK |
1987 TP_ACPI_HKEY_ZOOM_MASK |
1988 TP_ACPI_HKEY_DISPSWTCH_MASK |
1989 TP_ACPI_HKEY_HIBERNATE_MASK,
1990 TP_NVRAM_HKEY_GROUP_BRIGHTNESS = TP_ACPI_HKEY_BRGHTUP_MASK |
1991 TP_ACPI_HKEY_BRGHTDWN_MASK,
1992 TP_NVRAM_HKEY_GROUP_VOLUME = TP_ACPI_HKEY_VOLUP_MASK |
1993 TP_ACPI_HKEY_VOLDWN_MASK |
1994 TP_ACPI_HKEY_MUTE_MASK,
1995 };
1996
1997 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1998 struct tp_nvram_state {
1999 u16 thinkpad_toggle:1;
2000 u16 zoom_toggle:1;
2001 u16 display_toggle:1;
2002 u16 thinklight_toggle:1;
2003 u16 hibernate_toggle:1;
2004 u16 displayexp_toggle:1;
2005 u16 display_state:1;
2006 u16 brightness_toggle:1;
2007 u16 volume_toggle:1;
2008 u16 mute:1;
2009
2010 u8 brightness_level;
2011 u8 volume_level;
2012 };
2013
2014 /* kthread for the hotkey poller */
2015 static struct task_struct *tpacpi_hotkey_task;
2016
2017 /* Acquired while the poller kthread is running, use to sync start/stop */
2018 static struct mutex hotkey_thread_mutex;
2019
2020 /*
2021 * Acquire mutex to write poller control variables as an
2022 * atomic block.
2023 *
2024 * Increment hotkey_config_change when changing them if you
2025 * want the kthread to forget old state.
2026 *
2027 * See HOTKEY_CONFIG_CRITICAL_START/HOTKEY_CONFIG_CRITICAL_END
2028 */
2029 static struct mutex hotkey_thread_data_mutex;
2030 static unsigned int hotkey_config_change;
2031
2032 /*
2033 * hotkey poller control variables
2034 *
2035 * Must be atomic or readers will also need to acquire mutex
2036 *
2037 * HOTKEY_CONFIG_CRITICAL_START/HOTKEY_CONFIG_CRITICAL_END
2038 * should be used only when the changes need to be taken as
2039 * a block, OR when one needs to force the kthread to forget
2040 * old state.
2041 */
2042 static u32 hotkey_source_mask; /* bit mask 0=ACPI,1=NVRAM */
2043 static unsigned int hotkey_poll_freq = 10; /* Hz */
2044
2045 #define HOTKEY_CONFIG_CRITICAL_START \
2046 do { \
2047 mutex_lock(&hotkey_thread_data_mutex); \
2048 hotkey_config_change++; \
2049 } while (0);
2050 #define HOTKEY_CONFIG_CRITICAL_END \
2051 mutex_unlock(&hotkey_thread_data_mutex);
2052
2053 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2054
2055 #define hotkey_source_mask 0U
2056 #define HOTKEY_CONFIG_CRITICAL_START
2057 #define HOTKEY_CONFIG_CRITICAL_END
2058
2059 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2060
2061 static struct mutex hotkey_mutex;
2062
2063 static enum { /* Reasons for waking up */
2064 TP_ACPI_WAKEUP_NONE = 0, /* None or unknown */
2065 TP_ACPI_WAKEUP_BAYEJ, /* Bay ejection request */
2066 TP_ACPI_WAKEUP_UNDOCK, /* Undock request */
2067 } hotkey_wakeup_reason;
2068
2069 static int hotkey_autosleep_ack;
2070
2071 static u32 hotkey_orig_mask; /* events the BIOS had enabled */
2072 static u32 hotkey_all_mask; /* all events supported in fw */
2073 static u32 hotkey_reserved_mask; /* events better left disabled */
2074 static u32 hotkey_driver_mask; /* events needed by the driver */
2075 static u32 hotkey_user_mask; /* events visible to userspace */
2076 static u32 hotkey_acpi_mask; /* events enabled in firmware */
2077
2078 static unsigned int hotkey_report_mode;
2079
2080 static u16 *hotkey_keycode_map;
2081
2082 static struct attribute_set *hotkey_dev_attributes;
2083
2084 static void tpacpi_driver_event(const unsigned int hkey_event);
2085 static void hotkey_driver_event(const unsigned int scancode);
2086 static void hotkey_poll_setup(const bool may_warn);
2087
2088 /* HKEY.MHKG() return bits */
2089 #define TP_HOTKEY_TABLET_MASK (1 << 3)
2090
2091 static int hotkey_get_wlsw(void)
2092 {
2093 int status;
2094
2095 if (!tp_features.hotkey_wlsw)
2096 return -ENODEV;
2097
2098 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
2099 if (dbg_wlswemul)
2100 return (tpacpi_wlsw_emulstate) ?
2101 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
2102 #endif
2103
2104 if (!acpi_evalf(hkey_handle, &status, "WLSW", "d"))
2105 return -EIO;
2106
2107 return (status) ? TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
2108 }
2109
2110 static int hotkey_get_tablet_mode(int *status)
2111 {
2112 int s;
2113
2114 if (!acpi_evalf(hkey_handle, &s, "MHKG", "d"))
2115 return -EIO;
2116
2117 *status = ((s & TP_HOTKEY_TABLET_MASK) != 0);
2118 return 0;
2119 }
2120
2121 /*
2122 * Reads current event mask from firmware, and updates
2123 * hotkey_acpi_mask accordingly. Also resets any bits
2124 * from hotkey_user_mask that are unavailable to be
2125 * delivered (shadow requirement of the userspace ABI).
2126 *
2127 * Call with hotkey_mutex held
2128 */
2129 static int hotkey_mask_get(void)
2130 {
2131 if (tp_features.hotkey_mask) {
2132 u32 m = 0;
2133
2134 if (!acpi_evalf(hkey_handle, &m, "DHKN", "d"))
2135 return -EIO;
2136
2137 hotkey_acpi_mask = m;
2138 } else {
2139 /* no mask support doesn't mean no event support... */
2140 hotkey_acpi_mask = hotkey_all_mask;
2141 }
2142
2143 /* sync userspace-visible mask */
2144 hotkey_user_mask &= (hotkey_acpi_mask | hotkey_source_mask);
2145
2146 return 0;
2147 }
2148
2149 void static hotkey_mask_warn_incomplete_mask(void)
2150 {
2151 /* log only what the user can fix... */
2152 const u32 wantedmask = hotkey_driver_mask &
2153 ~(hotkey_acpi_mask | hotkey_source_mask) &
2154 (hotkey_all_mask | TPACPI_HKEY_NVRAM_KNOWN_MASK);
2155
2156 if (wantedmask)
2157 printk(TPACPI_NOTICE
2158 "required events 0x%08x not enabled!\n",
2159 wantedmask);
2160 }
2161
2162 /*
2163 * Set the firmware mask when supported
2164 *
2165 * Also calls hotkey_mask_get to update hotkey_acpi_mask.
2166 *
2167 * NOTE: does not set bits in hotkey_user_mask, but may reset them.
2168 *
2169 * Call with hotkey_mutex held
2170 */
2171 static int hotkey_mask_set(u32 mask)
2172 {
2173 int i;
2174 int rc = 0;
2175
2176 const u32 fwmask = mask & ~hotkey_source_mask;
2177
2178 if (tp_features.hotkey_mask) {
2179 for (i = 0; i < 32; i++) {
2180 if (!acpi_evalf(hkey_handle,
2181 NULL, "MHKM", "vdd", i + 1,
2182 !!(mask & (1 << i)))) {
2183 rc = -EIO;
2184 break;
2185 }
2186 }
2187 }
2188
2189 /*
2190 * We *must* make an inconditional call to hotkey_mask_get to
2191 * refresh hotkey_acpi_mask and update hotkey_user_mask
2192 *
2193 * Take the opportunity to also log when we cannot _enable_
2194 * a given event.
2195 */
2196 if (!hotkey_mask_get() && !rc && (fwmask & ~hotkey_acpi_mask)) {
2197 printk(TPACPI_NOTICE
2198 "asked for hotkey mask 0x%08x, but "
2199 "firmware forced it to 0x%08x\n",
2200 fwmask, hotkey_acpi_mask);
2201 }
2202
2203 if (tpacpi_lifecycle != TPACPI_LIFE_EXITING)
2204 hotkey_mask_warn_incomplete_mask();
2205
2206 return rc;
2207 }
2208
2209 /*
2210 * Sets hotkey_user_mask and tries to set the firmware mask
2211 *
2212 * Call with hotkey_mutex held
2213 */
2214 static int hotkey_user_mask_set(const u32 mask)
2215 {
2216 int rc;
2217
2218 /* Give people a chance to notice they are doing something that
2219 * is bound to go boom on their users sooner or later */
2220 if (!tp_warned.hotkey_mask_ff &&
2221 (mask == 0xffff || mask == 0xffffff ||
2222 mask == 0xffffffff)) {
2223 tp_warned.hotkey_mask_ff = 1;
2224 printk(TPACPI_NOTICE
2225 "setting the hotkey mask to 0x%08x is likely "
2226 "not the best way to go about it\n", mask);
2227 printk(TPACPI_NOTICE
2228 "please consider using the driver defaults, "
2229 "and refer to up-to-date thinkpad-acpi "
2230 "documentation\n");
2231 }
2232
2233 /* Try to enable what the user asked for, plus whatever we need.
2234 * this syncs everything but won't enable bits in hotkey_user_mask */
2235 rc = hotkey_mask_set((mask | hotkey_driver_mask) & ~hotkey_source_mask);
2236
2237 /* Enable the available bits in hotkey_user_mask */
2238 hotkey_user_mask = mask & (hotkey_acpi_mask | hotkey_source_mask);
2239
2240 return rc;
2241 }
2242
2243 /*
2244 * Sets the driver hotkey mask.
2245 *
2246 * Can be called even if the hotkey subdriver is inactive
2247 */
2248 static int tpacpi_hotkey_driver_mask_set(const u32 mask)
2249 {
2250 int rc;
2251
2252 /* Do the right thing if hotkey_init has not been called yet */
2253 if (!tp_features.hotkey) {
2254 hotkey_driver_mask = mask;
2255 return 0;
2256 }
2257
2258 mutex_lock(&hotkey_mutex);
2259
2260 HOTKEY_CONFIG_CRITICAL_START
2261 hotkey_driver_mask = mask;
2262 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2263 hotkey_source_mask |= (mask & ~hotkey_all_mask);
2264 #endif
2265 HOTKEY_CONFIG_CRITICAL_END
2266
2267 rc = hotkey_mask_set((hotkey_acpi_mask | hotkey_driver_mask) &
2268 ~hotkey_source_mask);
2269 hotkey_poll_setup(true);
2270
2271 mutex_unlock(&hotkey_mutex);
2272
2273 return rc;
2274 }
2275
2276 static int hotkey_status_get(int *status)
2277 {
2278 if (!acpi_evalf(hkey_handle, status, "DHKC", "d"))
2279 return -EIO;
2280
2281 return 0;
2282 }
2283
2284 static int hotkey_status_set(bool enable)
2285 {
2286 if (!acpi_evalf(hkey_handle, NULL, "MHKC", "vd", enable ? 1 : 0))
2287 return -EIO;
2288
2289 return 0;
2290 }
2291
2292 static void tpacpi_input_send_tabletsw(void)
2293 {
2294 int state;
2295
2296 if (tp_features.hotkey_tablet &&
2297 !hotkey_get_tablet_mode(&state)) {
2298 mutex_lock(&tpacpi_inputdev_send_mutex);
2299
2300 input_report_switch(tpacpi_inputdev,
2301 SW_TABLET_MODE, !!state);
2302 input_sync(tpacpi_inputdev);
2303
2304 mutex_unlock(&tpacpi_inputdev_send_mutex);
2305 }
2306 }
2307
2308 /* Do NOT call without validating scancode first */
2309 static void tpacpi_input_send_key(const unsigned int scancode)
2310 {
2311 const unsigned int keycode = hotkey_keycode_map[scancode];
2312
2313 if (keycode != KEY_RESERVED) {
2314 mutex_lock(&tpacpi_inputdev_send_mutex);
2315
2316 input_report_key(tpacpi_inputdev, keycode, 1);
2317 if (keycode == KEY_UNKNOWN)
2318 input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN,
2319 scancode);
2320 input_sync(tpacpi_inputdev);
2321
2322 input_report_key(tpacpi_inputdev, keycode, 0);
2323 if (keycode == KEY_UNKNOWN)
2324 input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN,
2325 scancode);
2326 input_sync(tpacpi_inputdev);
2327
2328 mutex_unlock(&tpacpi_inputdev_send_mutex);
2329 }
2330 }
2331
2332 /* Do NOT call without validating scancode first */
2333 static void tpacpi_input_send_key_masked(const unsigned int scancode)
2334 {
2335 hotkey_driver_event(scancode);
2336 if (hotkey_user_mask & (1 << scancode))
2337 tpacpi_input_send_key(scancode);
2338 }
2339
2340 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2341 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver;
2342
2343 /* Do NOT call without validating scancode first */
2344 static void tpacpi_hotkey_send_key(unsigned int scancode)
2345 {
2346 tpacpi_input_send_key_masked(scancode);
2347 if (hotkey_report_mode < 2) {
2348 acpi_bus_generate_proc_event(ibm_hotkey_acpidriver.device,
2349 0x80, TP_HKEY_EV_HOTKEY_BASE + scancode);
2350 }
2351 }
2352
2353 static void hotkey_read_nvram(struct tp_nvram_state *n, const u32 m)
2354 {
2355 u8 d;
2356
2357 if (m & TP_NVRAM_HKEY_GROUP_HK2) {
2358 d = nvram_read_byte(TP_NVRAM_ADDR_HK2);
2359 n->thinkpad_toggle = !!(d & TP_NVRAM_MASK_HKT_THINKPAD);
2360 n->zoom_toggle = !!(d & TP_NVRAM_MASK_HKT_ZOOM);
2361 n->display_toggle = !!(d & TP_NVRAM_MASK_HKT_DISPLAY);
2362 n->hibernate_toggle = !!(d & TP_NVRAM_MASK_HKT_HIBERNATE);
2363 }
2364 if (m & TP_ACPI_HKEY_THNKLGHT_MASK) {
2365 d = nvram_read_byte(TP_NVRAM_ADDR_THINKLIGHT);
2366 n->thinklight_toggle = !!(d & TP_NVRAM_MASK_THINKLIGHT);
2367 }
2368 if (m & TP_ACPI_HKEY_DISPXPAND_MASK) {
2369 d = nvram_read_byte(TP_NVRAM_ADDR_VIDEO);
2370 n->displayexp_toggle =
2371 !!(d & TP_NVRAM_MASK_HKT_DISPEXPND);
2372 }
2373 if (m & TP_NVRAM_HKEY_GROUP_BRIGHTNESS) {
2374 d = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS);
2375 n->brightness_level = (d & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
2376 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
2377 n->brightness_toggle =
2378 !!(d & TP_NVRAM_MASK_HKT_BRIGHTNESS);
2379 }
2380 if (m & TP_NVRAM_HKEY_GROUP_VOLUME) {
2381 d = nvram_read_byte(TP_NVRAM_ADDR_MIXER);
2382 n->volume_level = (d & TP_NVRAM_MASK_LEVEL_VOLUME)
2383 >> TP_NVRAM_POS_LEVEL_VOLUME;
2384 n->mute = !!(d & TP_NVRAM_MASK_MUTE);
2385 n->volume_toggle = !!(d & TP_NVRAM_MASK_HKT_VOLUME);
2386 }
2387 }
2388
2389 static void hotkey_compare_and_issue_event(struct tp_nvram_state *oldn,
2390 struct tp_nvram_state *newn,
2391 const u32 event_mask)
2392 {
2393
2394 #define TPACPI_COMPARE_KEY(__scancode, __member) \
2395 do { \
2396 if ((event_mask & (1 << __scancode)) && \
2397 oldn->__member != newn->__member) \
2398 tpacpi_hotkey_send_key(__scancode); \
2399 } while (0)
2400
2401 #define TPACPI_MAY_SEND_KEY(__scancode) \
2402 do { \
2403 if (event_mask & (1 << __scancode)) \
2404 tpacpi_hotkey_send_key(__scancode); \
2405 } while (0)
2406
2407 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_THINKPAD, thinkpad_toggle);
2408 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNSPACE, zoom_toggle);
2409 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF7, display_toggle);
2410 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF12, hibernate_toggle);
2411
2412 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNPAGEUP, thinklight_toggle);
2413
2414 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF8, displayexp_toggle);
2415
2416 /* handle volume */
2417 if (oldn->volume_toggle != newn->volume_toggle) {
2418 if (oldn->mute != newn->mute) {
2419 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE);
2420 }
2421 if (oldn->volume_level > newn->volume_level) {
2422 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
2423 } else if (oldn->volume_level < newn->volume_level) {
2424 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
2425 } else if (oldn->mute == newn->mute) {
2426 /* repeated key presses that didn't change state */
2427 if (newn->mute) {
2428 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE);
2429 } else if (newn->volume_level != 0) {
2430 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
2431 } else {
2432 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
2433 }
2434 }
2435 }
2436
2437 /* handle brightness */
2438 if (oldn->brightness_toggle != newn->brightness_toggle) {
2439 if (oldn->brightness_level < newn->brightness_level) {
2440 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
2441 } else if (oldn->brightness_level > newn->brightness_level) {
2442 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
2443 } else {
2444 /* repeated key presses that didn't change state */
2445 if (newn->brightness_level != 0) {
2446 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
2447 } else {
2448 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
2449 }
2450 }
2451 }
2452
2453 #undef TPACPI_COMPARE_KEY
2454 #undef TPACPI_MAY_SEND_KEY
2455 }
2456
2457 /*
2458 * Polling driver
2459 *
2460 * We track all events in hotkey_source_mask all the time, since
2461 * most of them are edge-based. We only issue those requested by
2462 * hotkey_user_mask or hotkey_driver_mask, though.
2463 */
2464 static int hotkey_kthread(void *data)
2465 {
2466 struct tp_nvram_state s[2];
2467 u32 poll_mask, event_mask;
2468 unsigned int si, so;
2469 unsigned long t;
2470 unsigned int change_detector, must_reset;
2471 unsigned int poll_freq;
2472
2473 mutex_lock(&hotkey_thread_mutex);
2474
2475 if (tpacpi_lifecycle == TPACPI_LIFE_EXITING)
2476 goto exit;
2477
2478 set_freezable();
2479
2480 so = 0;
2481 si = 1;
2482 t = 0;
2483
2484 /* Initial state for compares */
2485 mutex_lock(&hotkey_thread_data_mutex);
2486 change_detector = hotkey_config_change;
2487 poll_mask = hotkey_source_mask;
2488 event_mask = hotkey_source_mask &
2489 (hotkey_driver_mask | hotkey_user_mask);
2490 poll_freq = hotkey_poll_freq;
2491 mutex_unlock(&hotkey_thread_data_mutex);
2492 hotkey_read_nvram(&s[so], poll_mask);
2493
2494 while (!kthread_should_stop()) {
2495 if (t == 0) {
2496 if (likely(poll_freq))
2497 t = 1000/poll_freq;
2498 else
2499 t = 100; /* should never happen... */
2500 }
2501 t = msleep_interruptible(t);
2502 if (unlikely(kthread_should_stop()))
2503 break;
2504 must_reset = try_to_freeze();
2505 if (t > 0 && !must_reset)
2506 continue;
2507
2508 mutex_lock(&hotkey_thread_data_mutex);
2509 if (must_reset || hotkey_config_change != change_detector) {
2510 /* forget old state on thaw or config change */
2511 si = so;
2512 t = 0;
2513 change_detector = hotkey_config_change;
2514 }
2515 poll_mask = hotkey_source_mask;
2516 event_mask = hotkey_source_mask &
2517 (hotkey_driver_mask | hotkey_user_mask);
2518 poll_freq = hotkey_poll_freq;
2519 mutex_unlock(&hotkey_thread_data_mutex);
2520
2521 if (likely(poll_mask)) {
2522 hotkey_read_nvram(&s[si], poll_mask);
2523 if (likely(si != so)) {
2524 hotkey_compare_and_issue_event(&s[so], &s[si],
2525 event_mask);
2526 }
2527 }
2528
2529 so = si;
2530 si ^= 1;
2531 }
2532
2533 exit:
2534 mutex_unlock(&hotkey_thread_mutex);
2535 return 0;
2536 }
2537
2538 /* call with hotkey_mutex held */
2539 static void hotkey_poll_stop_sync(void)
2540 {
2541 if (tpacpi_hotkey_task) {
2542 if (frozen(tpacpi_hotkey_task) ||
2543 freezing(tpacpi_hotkey_task))
2544 thaw_process(tpacpi_hotkey_task);
2545
2546 kthread_stop(tpacpi_hotkey_task);
2547 tpacpi_hotkey_task = NULL;
2548 mutex_lock(&hotkey_thread_mutex);
2549 /* at this point, the thread did exit */
2550 mutex_unlock(&hotkey_thread_mutex);
2551 }
2552 }
2553
2554 /* call with hotkey_mutex held */
2555 static void hotkey_poll_setup(const bool may_warn)
2556 {
2557 const u32 poll_driver_mask = hotkey_driver_mask & hotkey_source_mask;
2558 const u32 poll_user_mask = hotkey_user_mask & hotkey_source_mask;
2559
2560 if (hotkey_poll_freq > 0 &&
2561 (poll_driver_mask ||
2562 (poll_user_mask && tpacpi_inputdev->users > 0))) {
2563 if (!tpacpi_hotkey_task) {
2564 tpacpi_hotkey_task = kthread_run(hotkey_kthread,
2565 NULL, TPACPI_NVRAM_KTHREAD_NAME);
2566 if (IS_ERR(tpacpi_hotkey_task)) {
2567 tpacpi_hotkey_task = NULL;
2568 printk(TPACPI_ERR
2569 "could not create kernel thread "
2570 "for hotkey polling\n");
2571 }
2572 }
2573 } else {
2574 hotkey_poll_stop_sync();
2575 if (may_warn && (poll_driver_mask || poll_user_mask) &&
2576 hotkey_poll_freq == 0) {
2577 printk(TPACPI_NOTICE
2578 "hot keys 0x%08x and/or events 0x%08x "
2579 "require polling, which is currently "
2580 "disabled\n",
2581 poll_user_mask, poll_driver_mask);
2582 }
2583 }
2584 }
2585
2586 static void hotkey_poll_setup_safe(const bool may_warn)
2587 {
2588 mutex_lock(&hotkey_mutex);
2589 hotkey_poll_setup(may_warn);
2590 mutex_unlock(&hotkey_mutex);
2591 }
2592
2593 /* call with hotkey_mutex held */
2594 static void hotkey_poll_set_freq(unsigned int freq)
2595 {
2596 if (!freq)
2597 hotkey_poll_stop_sync();
2598
2599 hotkey_poll_freq = freq;
2600 }
2601
2602 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2603
2604 static void hotkey_poll_setup(const bool __unused)
2605 {
2606 }
2607
2608 static void hotkey_poll_setup_safe(const bool __unused)
2609 {
2610 }
2611
2612 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2613
2614 static int hotkey_inputdev_open(struct input_dev *dev)
2615 {
2616 switch (tpacpi_lifecycle) {
2617 case TPACPI_LIFE_INIT:
2618 case TPACPI_LIFE_RUNNING:
2619 hotkey_poll_setup_safe(false);
2620 return 0;
2621 case TPACPI_LIFE_EXITING:
2622 return -EBUSY;
2623 }
2624
2625 /* Should only happen if tpacpi_lifecycle is corrupt */
2626 BUG();
2627 return -EBUSY;
2628 }
2629
2630 static void hotkey_inputdev_close(struct input_dev *dev)
2631 {
2632 /* disable hotkey polling when possible */
2633 if (tpacpi_lifecycle != TPACPI_LIFE_EXITING &&
2634 !(hotkey_source_mask & hotkey_driver_mask))
2635 hotkey_poll_setup_safe(false);
2636 }
2637
2638 /* sysfs hotkey enable ------------------------------------------------- */
2639 static ssize_t hotkey_enable_show(struct device *dev,
2640 struct device_attribute *attr,
2641 char *buf)
2642 {
2643 int res, status;
2644
2645 printk_deprecated_attribute("hotkey_enable",
2646 "Hotkey reporting is always enabled");
2647
2648 res = hotkey_status_get(&status);
2649 if (res)
2650 return res;
2651
2652 return snprintf(buf, PAGE_SIZE, "%d\n", status);
2653 }
2654
2655 static ssize_t hotkey_enable_store(struct device *dev,
2656 struct device_attribute *attr,
2657 const char *buf, size_t count)
2658 {
2659 unsigned long t;
2660
2661 printk_deprecated_attribute("hotkey_enable",
2662 "Hotkeys can be disabled through hotkey_mask");
2663
2664 if (parse_strtoul(buf, 1, &t))
2665 return -EINVAL;
2666
2667 if (t == 0)
2668 return -EPERM;
2669
2670 return count;
2671 }
2672
2673 static struct device_attribute dev_attr_hotkey_enable =
2674 __ATTR(hotkey_enable, S_IWUSR | S_IRUGO,
2675 hotkey_enable_show, hotkey_enable_store);
2676
2677 /* sysfs hotkey mask --------------------------------------------------- */
2678 static ssize_t hotkey_mask_show(struct device *dev,
2679 struct device_attribute *attr,
2680 char *buf)
2681 {
2682 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_user_mask);
2683 }
2684
2685 static ssize_t hotkey_mask_store(struct device *dev,
2686 struct device_attribute *attr,
2687 const char *buf, size_t count)
2688 {
2689 unsigned long t;
2690 int res;
2691
2692 if (parse_strtoul(buf, 0xffffffffUL, &t))
2693 return -EINVAL;
2694
2695 if (mutex_lock_killable(&hotkey_mutex))
2696 return -ERESTARTSYS;
2697
2698 res = hotkey_user_mask_set(t);
2699
2700 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2701 hotkey_poll_setup(true);
2702 #endif
2703
2704 mutex_unlock(&hotkey_mutex);
2705
2706 tpacpi_disclose_usertask("hotkey_mask", "set to 0x%08lx\n", t);
2707
2708 return (res) ? res : count;
2709 }
2710
2711 static struct device_attribute dev_attr_hotkey_mask =
2712 __ATTR(hotkey_mask, S_IWUSR | S_IRUGO,
2713 hotkey_mask_show, hotkey_mask_store);
2714
2715 /* sysfs hotkey bios_enabled ------------------------------------------- */
2716 static ssize_t hotkey_bios_enabled_show(struct device *dev,
2717 struct device_attribute *attr,
2718 char *buf)
2719 {
2720 return sprintf(buf, "0\n");
2721 }
2722
2723 static struct device_attribute dev_attr_hotkey_bios_enabled =
2724 __ATTR(hotkey_bios_enabled, S_IRUGO, hotkey_bios_enabled_show, NULL);
2725
2726 /* sysfs hotkey bios_mask ---------------------------------------------- */
2727 static ssize_t hotkey_bios_mask_show(struct device *dev,
2728 struct device_attribute *attr,
2729 char *buf)
2730 {
2731 printk_deprecated_attribute("hotkey_bios_mask",
2732 "This attribute is useless.");
2733 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_orig_mask);
2734 }
2735
2736 static struct device_attribute dev_attr_hotkey_bios_mask =
2737 __ATTR(hotkey_bios_mask, S_IRUGO, hotkey_bios_mask_show, NULL);
2738
2739 /* sysfs hotkey all_mask ----------------------------------------------- */
2740 static ssize_t hotkey_all_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 }
2747
2748 static struct device_attribute dev_attr_hotkey_all_mask =
2749 __ATTR(hotkey_all_mask, S_IRUGO, hotkey_all_mask_show, NULL);
2750
2751 /* sysfs hotkey recommended_mask --------------------------------------- */
2752 static ssize_t hotkey_recommended_mask_show(struct device *dev,
2753 struct device_attribute *attr,
2754 char *buf)
2755 {
2756 return snprintf(buf, PAGE_SIZE, "0x%08x\n",
2757 (hotkey_all_mask | hotkey_source_mask)
2758 & ~hotkey_reserved_mask);
2759 }
2760
2761 static struct device_attribute dev_attr_hotkey_recommended_mask =
2762 __ATTR(hotkey_recommended_mask, S_IRUGO,
2763 hotkey_recommended_mask_show, NULL);
2764
2765 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2766
2767 /* sysfs hotkey hotkey_source_mask ------------------------------------- */
2768 static ssize_t hotkey_source_mask_show(struct device *dev,
2769 struct device_attribute *attr,
2770 char *buf)
2771 {
2772 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_source_mask);
2773 }
2774
2775 static ssize_t hotkey_source_mask_store(struct device *dev,
2776 struct device_attribute *attr,
2777 const char *buf, size_t count)
2778 {
2779 unsigned long t;
2780 u32 r_ev;
2781 int rc;
2782
2783 if (parse_strtoul(buf, 0xffffffffUL, &t) ||
2784 ((t & ~TPACPI_HKEY_NVRAM_KNOWN_MASK) != 0))
2785 return -EINVAL;
2786
2787 if (mutex_lock_killable(&hotkey_mutex))
2788 return -ERESTARTSYS;
2789
2790 HOTKEY_CONFIG_CRITICAL_START
2791 hotkey_source_mask = t;
2792 HOTKEY_CONFIG_CRITICAL_END
2793
2794 rc = hotkey_mask_set((hotkey_user_mask | hotkey_driver_mask) &
2795 ~hotkey_source_mask);
2796 hotkey_poll_setup(true);
2797
2798 /* check if events needed by the driver got disabled */
2799 r_ev = hotkey_driver_mask & ~(hotkey_acpi_mask & hotkey_all_mask)
2800 & ~hotkey_source_mask & TPACPI_HKEY_NVRAM_KNOWN_MASK;
2801
2802 mutex_unlock(&hotkey_mutex);
2803
2804 if (rc < 0)
2805 printk(TPACPI_ERR "hotkey_source_mask: failed to update the"
2806 "firmware event mask!\n");
2807
2808 if (r_ev)
2809 printk(TPACPI_NOTICE "hotkey_source_mask: "
2810 "some important events were disabled: "
2811 "0x%04x\n", r_ev);
2812
2813 tpacpi_disclose_usertask("hotkey_source_mask", "set to 0x%08lx\n", t);
2814
2815 return (rc < 0) ? rc : count;
2816 }
2817
2818 static struct device_attribute dev_attr_hotkey_source_mask =
2819 __ATTR(hotkey_source_mask, S_IWUSR | S_IRUGO,
2820 hotkey_source_mask_show, hotkey_source_mask_store);
2821
2822 /* sysfs hotkey hotkey_poll_freq --------------------------------------- */
2823 static ssize_t hotkey_poll_freq_show(struct device *dev,
2824 struct device_attribute *attr,
2825 char *buf)
2826 {
2827 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_poll_freq);
2828 }
2829
2830 static ssize_t hotkey_poll_freq_store(struct device *dev,
2831 struct device_attribute *attr,
2832 const char *buf, size_t count)
2833 {
2834 unsigned long t;
2835
2836 if (parse_strtoul(buf, 25, &t))
2837 return -EINVAL;
2838
2839 if (mutex_lock_killable(&hotkey_mutex))
2840 return -ERESTARTSYS;
2841
2842 hotkey_poll_set_freq(t);
2843 hotkey_poll_setup(true);
2844
2845 mutex_unlock(&hotkey_mutex);
2846
2847 tpacpi_disclose_usertask("hotkey_poll_freq", "set to %lu\n", t);
2848
2849 return count;
2850 }
2851
2852 static struct device_attribute dev_attr_hotkey_poll_freq =
2853 __ATTR(hotkey_poll_freq, S_IWUSR | S_IRUGO,
2854 hotkey_poll_freq_show, hotkey_poll_freq_store);
2855
2856 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2857
2858 /* sysfs hotkey radio_sw (pollable) ------------------------------------ */
2859 static ssize_t hotkey_radio_sw_show(struct device *dev,
2860 struct device_attribute *attr,
2861 char *buf)
2862 {
2863 int res;
2864 res = hotkey_get_wlsw();
2865 if (res < 0)
2866 return res;
2867
2868 /* Opportunistic update */
2869 tpacpi_rfk_update_hwblock_state((res == TPACPI_RFK_RADIO_OFF));
2870
2871 return snprintf(buf, PAGE_SIZE, "%d\n",
2872 (res == TPACPI_RFK_RADIO_OFF) ? 0 : 1);
2873 }
2874
2875 static struct device_attribute dev_attr_hotkey_radio_sw =
2876 __ATTR(hotkey_radio_sw, S_IRUGO, hotkey_radio_sw_show, NULL);
2877
2878 static void hotkey_radio_sw_notify_change(void)
2879 {
2880 if (tp_features.hotkey_wlsw)
2881 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2882 "hotkey_radio_sw");
2883 }
2884
2885 /* sysfs hotkey tablet mode (pollable) --------------------------------- */
2886 static ssize_t hotkey_tablet_mode_show(struct device *dev,
2887 struct device_attribute *attr,
2888 char *buf)
2889 {
2890 int res, s;
2891 res = hotkey_get_tablet_mode(&s);
2892 if (res < 0)
2893 return res;
2894
2895 return snprintf(buf, PAGE_SIZE, "%d\n", !!s);
2896 }
2897
2898 static struct device_attribute dev_attr_hotkey_tablet_mode =
2899 __ATTR(hotkey_tablet_mode, S_IRUGO, hotkey_tablet_mode_show, NULL);
2900
2901 static void hotkey_tablet_mode_notify_change(void)
2902 {
2903 if (tp_features.hotkey_tablet)
2904 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2905 "hotkey_tablet_mode");
2906 }
2907
2908 /* sysfs hotkey report_mode -------------------------------------------- */
2909 static ssize_t hotkey_report_mode_show(struct device *dev,
2910 struct device_attribute *attr,
2911 char *buf)
2912 {
2913 return snprintf(buf, PAGE_SIZE, "%d\n",
2914 (hotkey_report_mode != 0) ? hotkey_report_mode : 1);
2915 }
2916
2917 static struct device_attribute dev_attr_hotkey_report_mode =
2918 __ATTR(hotkey_report_mode, S_IRUGO, hotkey_report_mode_show, NULL);
2919
2920 /* sysfs wakeup reason (pollable) -------------------------------------- */
2921 static ssize_t hotkey_wakeup_reason_show(struct device *dev,
2922 struct device_attribute *attr,
2923 char *buf)
2924 {
2925 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_wakeup_reason);
2926 }
2927
2928 static struct device_attribute dev_attr_hotkey_wakeup_reason =
2929 __ATTR(wakeup_reason, S_IRUGO, hotkey_wakeup_reason_show, NULL);
2930
2931 static void hotkey_wakeup_reason_notify_change(void)
2932 {
2933 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2934 "wakeup_reason");
2935 }
2936
2937 /* sysfs wakeup hotunplug_complete (pollable) -------------------------- */
2938 static ssize_t hotkey_wakeup_hotunplug_complete_show(struct device *dev,
2939 struct device_attribute *attr,
2940 char *buf)
2941 {
2942 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_autosleep_ack);
2943 }
2944
2945 static struct device_attribute dev_attr_hotkey_wakeup_hotunplug_complete =
2946 __ATTR(wakeup_hotunplug_complete, S_IRUGO,
2947 hotkey_wakeup_hotunplug_complete_show, NULL);
2948
2949 static void hotkey_wakeup_hotunplug_complete_notify_change(void)
2950 {
2951 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2952 "wakeup_hotunplug_complete");
2953 }
2954
2955 /* --------------------------------------------------------------------- */
2956
2957 static struct attribute *hotkey_attributes[] __initdata = {
2958 &dev_attr_hotkey_enable.attr,
2959 &dev_attr_hotkey_bios_enabled.attr,
2960 &dev_attr_hotkey_bios_mask.attr,
2961 &dev_attr_hotkey_report_mode.attr,
2962 &dev_attr_hotkey_wakeup_reason.attr,
2963 &dev_attr_hotkey_wakeup_hotunplug_complete.attr,
2964 &dev_attr_hotkey_mask.attr,
2965 &dev_attr_hotkey_all_mask.attr,
2966 &dev_attr_hotkey_recommended_mask.attr,
2967 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2968 &dev_attr_hotkey_source_mask.attr,
2969 &dev_attr_hotkey_poll_freq.attr,
2970 #endif
2971 };
2972
2973 /*
2974 * Sync both the hw and sw blocking state of all switches
2975 */
2976 static void tpacpi_send_radiosw_update(void)
2977 {
2978 int wlsw;
2979
2980 /*
2981 * We must sync all rfkill controllers *before* issuing any
2982 * rfkill input events, or we will race the rfkill core input
2983 * handler.
2984 *
2985 * tpacpi_inputdev_send_mutex works as a syncronization point
2986 * for the above.
2987 *
2988 * We optimize to avoid numerous calls to hotkey_get_wlsw.
2989 */
2990
2991 wlsw = hotkey_get_wlsw();
2992
2993 /* Sync hw blocking state first if it is hw-blocked */
2994 if (wlsw == TPACPI_RFK_RADIO_OFF)
2995 tpacpi_rfk_update_hwblock_state(true);
2996
2997 /* Sync sw blocking state */
2998 tpacpi_rfk_update_swstate_all();
2999
3000 /* Sync hw blocking state last if it is hw-unblocked */
3001 if (wlsw == TPACPI_RFK_RADIO_ON)
3002 tpacpi_rfk_update_hwblock_state(false);
3003
3004 /* Issue rfkill input event for WLSW switch */
3005 if (!(wlsw < 0)) {
3006 mutex_lock(&tpacpi_inputdev_send_mutex);
3007
3008 input_report_switch(tpacpi_inputdev,
3009 SW_RFKILL_ALL, (wlsw > 0));
3010 input_sync(tpacpi_inputdev);
3011
3012 mutex_unlock(&tpacpi_inputdev_send_mutex);
3013 }
3014
3015 /*
3016 * this can be unconditional, as we will poll state again
3017 * if userspace uses the notify to read data
3018 */
3019 hotkey_radio_sw_notify_change();
3020 }
3021
3022 static void hotkey_exit(void)
3023 {
3024 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
3025 mutex_lock(&hotkey_mutex);
3026 hotkey_poll_stop_sync();
3027 mutex_unlock(&hotkey_mutex);
3028 #endif
3029
3030 if (hotkey_dev_attributes)
3031 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
3032
3033 kfree(hotkey_keycode_map);
3034
3035 dbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_HKEY,
3036 "restoring original HKEY status and mask\n");
3037 /* yes, there is a bitwise or below, we want the
3038 * functions to be called even if one of them fail */
3039 if (((tp_features.hotkey_mask &&
3040 hotkey_mask_set(hotkey_orig_mask)) |
3041 hotkey_status_set(false)) != 0)
3042 printk(TPACPI_ERR
3043 "failed to restore hot key mask "
3044 "to BIOS defaults\n");
3045 }
3046
3047 static void __init hotkey_unmap(const unsigned int scancode)
3048 {
3049 if (hotkey_keycode_map[scancode] != KEY_RESERVED) {
3050 clear_bit(hotkey_keycode_map[scancode],
3051 tpacpi_inputdev->keybit);
3052 hotkey_keycode_map[scancode] = KEY_RESERVED;
3053 }
3054 }
3055
3056 /*
3057 * HKEY quirks:
3058 * TPACPI_HK_Q_INIMASK: Supports FN+F3,FN+F4,FN+F12
3059 */
3060
3061 #define TPACPI_HK_Q_INIMASK 0x0001
3062
3063 static const struct tpacpi_quirk tpacpi_hotkey_qtable[] __initconst = {
3064 TPACPI_Q_IBM('I', 'H', TPACPI_HK_Q_INIMASK), /* 600E */
3065 TPACPI_Q_IBM('I', 'N', TPACPI_HK_Q_INIMASK), /* 600E */
3066 TPACPI_Q_IBM('I', 'D', TPACPI_HK_Q_INIMASK), /* 770, 770E, 770ED */
3067 TPACPI_Q_IBM('I', 'W', TPACPI_HK_Q_INIMASK), /* A20m */
3068 TPACPI_Q_IBM('I', 'V', TPACPI_HK_Q_INIMASK), /* A20p */
3069 TPACPI_Q_IBM('1', '0', TPACPI_HK_Q_INIMASK), /* A21e, A22e */
3070 TPACPI_Q_IBM('K', 'U', TPACPI_HK_Q_INIMASK), /* A21e */
3071 TPACPI_Q_IBM('K', 'X', TPACPI_HK_Q_INIMASK), /* A21m, A22m */
3072 TPACPI_Q_IBM('K', 'Y', TPACPI_HK_Q_INIMASK), /* A21p, A22p */
3073 TPACPI_Q_IBM('1', 'B', TPACPI_HK_Q_INIMASK), /* A22e */
3074 TPACPI_Q_IBM('1', '3', TPACPI_HK_Q_INIMASK), /* A22m */
3075 TPACPI_Q_IBM('1', 'E', TPACPI_HK_Q_INIMASK), /* A30/p (0) */
3076 TPACPI_Q_IBM('1', 'C', TPACPI_HK_Q_INIMASK), /* R30 */
3077 TPACPI_Q_IBM('1', 'F', TPACPI_HK_Q_INIMASK), /* R31 */
3078 TPACPI_Q_IBM('I', 'Y', TPACPI_HK_Q_INIMASK), /* T20 */
3079 TPACPI_Q_IBM('K', 'Z', TPACPI_HK_Q_INIMASK), /* T21 */
3080 TPACPI_Q_IBM('1', '6', TPACPI_HK_Q_INIMASK), /* T22 */
3081 TPACPI_Q_IBM('I', 'Z', TPACPI_HK_Q_INIMASK), /* X20, X21 */
3082 TPACPI_Q_IBM('1', 'D', TPACPI_HK_Q_INIMASK), /* X22, X23, X24 */
3083 };
3084
3085 static int __init hotkey_init(struct ibm_init_struct *iibm)
3086 {
3087 /* Requirements for changing the default keymaps:
3088 *
3089 * 1. Many of the keys are mapped to KEY_RESERVED for very
3090 * good reasons. Do not change them unless you have deep
3091 * knowledge on the IBM and Lenovo ThinkPad firmware for
3092 * the various ThinkPad models. The driver behaves
3093 * differently for KEY_RESERVED: such keys have their
3094 * hot key mask *unset* in mask_recommended, and also
3095 * in the initial hot key mask programmed into the
3096 * firmware at driver load time, which means the firm-
3097 * ware may react very differently if you change them to
3098 * something else;
3099 *
3100 * 2. You must be subscribed to the linux-thinkpad and
3101 * ibm-acpi-devel mailing lists, and you should read the
3102 * list archives since 2007 if you want to change the
3103 * keymaps. This requirement exists so that you will
3104 * know the past history of problems with the thinkpad-
3105 * acpi driver keymaps, and also that you will be
3106 * listening to any bug reports;
3107 *
3108 * 3. Do not send thinkpad-acpi specific patches directly to
3109 * for merging, *ever*. Send them to the linux-acpi
3110 * mailinglist for comments. Merging is to be done only
3111 * through acpi-test and the ACPI maintainer.
3112 *
3113 * If the above is too much to ask, don't change the keymap.
3114 * Ask the thinkpad-acpi maintainer to do it, instead.
3115 */
3116 static u16 ibm_keycode_map[] __initdata = {
3117 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
3118 KEY_FN_F1, KEY_FN_F2, KEY_COFFEE, KEY_SLEEP,
3119 KEY_WLAN, KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
3120 KEY_FN_F9, KEY_FN_F10, KEY_FN_F11, KEY_SUSPEND,
3121
3122 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
3123 KEY_UNKNOWN, /* 0x0C: FN+BACKSPACE */
3124 KEY_UNKNOWN, /* 0x0D: FN+INSERT */
3125 KEY_UNKNOWN, /* 0x0E: FN+DELETE */
3126
3127 /* brightness: firmware always reacts to them */
3128 KEY_RESERVED, /* 0x0F: FN+HOME (brightness up) */
3129 KEY_RESERVED, /* 0x10: FN+END (brightness down) */
3130
3131 /* Thinklight: firmware always react to it */
3132 KEY_RESERVED, /* 0x11: FN+PGUP (thinklight toggle) */
3133
3134 KEY_UNKNOWN, /* 0x12: FN+PGDOWN */
3135 KEY_ZOOM, /* 0x13: FN+SPACE (zoom) */
3136
3137 /* Volume: firmware always react to it and reprograms
3138 * the built-in *extra* mixer. Never map it to control
3139 * another mixer by default. */
3140 KEY_RESERVED, /* 0x14: VOLUME UP */
3141 KEY_RESERVED, /* 0x15: VOLUME DOWN */
3142 KEY_RESERVED, /* 0x16: MUTE */
3143
3144 KEY_VENDOR, /* 0x17: Thinkpad/AccessIBM/Lenovo */
3145
3146 /* (assignments unknown, please report if found) */
3147 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3148 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3149 };
3150 static u16 lenovo_keycode_map[] __initdata = {
3151 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
3152 KEY_FN_F1, KEY_COFFEE, KEY_BATTERY, KEY_SLEEP,
3153 KEY_WLAN, KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
3154 KEY_FN_F9, KEY_FN_F10, KEY_FN_F11, KEY_SUSPEND,
3155
3156 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
3157 KEY_UNKNOWN, /* 0x0C: FN+BACKSPACE */
3158 KEY_UNKNOWN, /* 0x0D: FN+INSERT */
3159 KEY_UNKNOWN, /* 0x0E: FN+DELETE */
3160
3161 /* These should be enabled --only-- when ACPI video
3162 * is disabled (i.e. in "vendor" mode), and are handled
3163 * in a special way by the init code */
3164 KEY_BRIGHTNESSUP, /* 0x0F: FN+HOME (brightness up) */
3165 KEY_BRIGHTNESSDOWN, /* 0x10: FN+END (brightness down) */
3166
3167 KEY_RESERVED, /* 0x11: FN+PGUP (thinklight toggle) */
3168
3169 KEY_UNKNOWN, /* 0x12: FN+PGDOWN */
3170 KEY_ZOOM, /* 0x13: FN+SPACE (zoom) */
3171
3172 /* Volume: z60/z61, T60 (BIOS version?): firmware always
3173 * react to it and reprograms the built-in *extra* mixer.
3174 * Never map it to control another mixer by default.
3175 *
3176 * T60?, T61, R60?, R61: firmware and EC tries to send
3177 * these over the regular keyboard, so these are no-ops,
3178 * but there are still weird bugs re. MUTE, so do not
3179 * change unless you get test reports from all Lenovo
3180 * models. May cause the BIOS to interfere with the
3181 * HDA mixer.
3182 */
3183 KEY_RESERVED, /* 0x14: VOLUME UP */
3184 KEY_RESERVED, /* 0x15: VOLUME DOWN */
3185 KEY_RESERVED, /* 0x16: MUTE */
3186
3187 KEY_VENDOR, /* 0x17: Thinkpad/AccessIBM/Lenovo */
3188
3189 /* (assignments unknown, please report if found) */
3190 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3191 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3192 };
3193
3194 #define TPACPI_HOTKEY_MAP_LEN ARRAY_SIZE(ibm_keycode_map)
3195 #define TPACPI_HOTKEY_MAP_SIZE sizeof(ibm_keycode_map)
3196 #define TPACPI_HOTKEY_MAP_TYPESIZE sizeof(ibm_keycode_map[0])
3197
3198 int res, i;
3199 int status;
3200 int hkeyv;
3201 bool radiosw_state = false;
3202 bool tabletsw_state = false;
3203
3204 unsigned long quirks;
3205
3206 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3207 "initializing hotkey subdriver\n");
3208
3209 BUG_ON(!tpacpi_inputdev);
3210 BUG_ON(tpacpi_inputdev->open != NULL ||
3211 tpacpi_inputdev->close != NULL);
3212
3213 TPACPI_ACPIHANDLE_INIT(hkey);
3214 mutex_init(&hotkey_mutex);
3215
3216 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
3217 mutex_init(&hotkey_thread_mutex);
3218 mutex_init(&hotkey_thread_data_mutex);
3219 #endif
3220
3221 /* hotkey not supported on 570 */
3222 tp_features.hotkey = hkey_handle != NULL;
3223
3224 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3225 "hotkeys are %s\n",
3226 str_supported(tp_features.hotkey));
3227
3228 if (!tp_features.hotkey)
3229 return 1;
3230
3231 quirks = tpacpi_check_quirks(tpacpi_hotkey_qtable,
3232 ARRAY_SIZE(tpacpi_hotkey_qtable));
3233
3234 tpacpi_disable_brightness_delay();
3235
3236 /* MUST have enough space for all attributes to be added to
3237 * hotkey_dev_attributes */
3238 hotkey_dev_attributes = create_attr_set(
3239 ARRAY_SIZE(hotkey_attributes) + 2,
3240 NULL);
3241 if (!hotkey_dev_attributes)
3242 return -ENOMEM;
3243 res = add_many_to_attr_set(hotkey_dev_attributes,
3244 hotkey_attributes,
3245 ARRAY_SIZE(hotkey_attributes));
3246 if (res)
3247 goto err_exit;
3248
3249 /* mask not supported on 600e/x, 770e, 770x, A21e, A2xm/p,
3250 A30, R30, R31, T20-22, X20-21, X22-24. Detected by checking
3251 for HKEY interface version 0x100 */
3252 if (acpi_evalf(hkey_handle, &hkeyv, "MHKV", "qd")) {
3253 if ((hkeyv >> 8) != 1) {
3254 printk(TPACPI_ERR "unknown version of the "
3255 "HKEY interface: 0x%x\n", hkeyv);
3256 printk(TPACPI_ERR "please report this to %s\n",
3257 TPACPI_MAIL);
3258 } else {
3259 /*
3260 * MHKV 0x100 in A31, R40, R40e,
3261 * T4x, X31, and later
3262 */
3263 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3264 "firmware HKEY interface version: 0x%x\n",
3265 hkeyv);
3266
3267 /* Paranoia check AND init hotkey_all_mask */
3268 if (!acpi_evalf(hkey_handle, &hotkey_all_mask,
3269 "MHKA", "qd")) {
3270 printk(TPACPI_ERR
3271 "missing MHKA handler, "
3272 "please report this to %s\n",
3273 TPACPI_MAIL);
3274 /* Fallback: pre-init for FN+F3,F4,F12 */
3275 hotkey_all_mask = 0x080cU;
3276 } else {
3277 tp_features.hotkey_mask = 1;
3278 }
3279 }
3280 }
3281
3282 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3283 "hotkey masks are %s\n",
3284 str_supported(tp_features.hotkey_mask));
3285
3286 /* Init hotkey_all_mask if not initialized yet */
3287 if (!tp_features.hotkey_mask && !hotkey_all_mask &&
3288 (quirks & TPACPI_HK_Q_INIMASK))
3289 hotkey_all_mask = 0x080cU; /* FN+F12, FN+F4, FN+F3 */
3290
3291 /* Init hotkey_acpi_mask and hotkey_orig_mask */
3292 if (tp_features.hotkey_mask) {
3293 /* hotkey_source_mask *must* be zero for
3294 * the first hotkey_mask_get to return hotkey_orig_mask */
3295 res = hotkey_mask_get();
3296 if (res)
3297 goto err_exit;
3298
3299 hotkey_orig_mask = hotkey_acpi_mask;
3300 } else {
3301 hotkey_orig_mask = hotkey_all_mask;
3302 hotkey_acpi_mask = hotkey_all_mask;
3303 }
3304
3305 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3306 if (dbg_wlswemul) {
3307 tp_features.hotkey_wlsw = 1;
3308 radiosw_state = !!tpacpi_wlsw_emulstate;
3309 printk(TPACPI_INFO
3310 "radio switch emulation enabled\n");
3311 } else
3312 #endif
3313 /* Not all thinkpads have a hardware radio switch */
3314 if (acpi_evalf(hkey_handle, &status, "WLSW", "qd")) {
3315 tp_features.hotkey_wlsw = 1;
3316 radiosw_state = !!status;
3317 printk(TPACPI_INFO
3318 "radio switch found; radios are %s\n",
3319 enabled(status, 0));
3320 }
3321 if (tp_features.hotkey_wlsw)
3322 res = add_to_attr_set(hotkey_dev_attributes,
3323 &dev_attr_hotkey_radio_sw.attr);
3324
3325 /* For X41t, X60t, X61t Tablets... */
3326 if (!res && acpi_evalf(hkey_handle, &status, "MHKG", "qd")) {
3327 tp_features.hotkey_tablet = 1;
3328 tabletsw_state = !!(status & TP_HOTKEY_TABLET_MASK);
3329 printk(TPACPI_INFO
3330 "possible tablet mode switch found; "
3331 "ThinkPad in %s mode\n",
3332 (tabletsw_state) ? "tablet" : "laptop");
3333 res = add_to_attr_set(hotkey_dev_attributes,
3334 &dev_attr_hotkey_tablet_mode.attr);
3335 }
3336
3337 if (!res)
3338 res = register_attr_set_with_sysfs(
3339 hotkey_dev_attributes,
3340 &tpacpi_pdev->dev.kobj);
3341 if (res)
3342 goto err_exit;
3343
3344 /* Set up key map */
3345
3346 hotkey_keycode_map = kmalloc(TPACPI_HOTKEY_MAP_SIZE,
3347 GFP_KERNEL);
3348 if (!hotkey_keycode_map) {
3349 printk(TPACPI_ERR
3350 "failed to allocate memory for key map\n");
3351 res = -ENOMEM;
3352 goto err_exit;
3353 }
3354
3355 if (thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO) {
3356 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3357 "using Lenovo default hot key map\n");
3358 memcpy(hotkey_keycode_map, &lenovo_keycode_map,
3359 TPACPI_HOTKEY_MAP_SIZE);
3360 } else {
3361 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3362 "using IBM default hot key map\n");
3363 memcpy(hotkey_keycode_map, &ibm_keycode_map,
3364 TPACPI_HOTKEY_MAP_SIZE);
3365 }
3366
3367 input_set_capability(tpacpi_inputdev, EV_MSC, MSC_SCAN);
3368 tpacpi_inputdev->keycodesize = TPACPI_HOTKEY_MAP_TYPESIZE;
3369 tpacpi_inputdev->keycodemax = TPACPI_HOTKEY_MAP_LEN;
3370 tpacpi_inputdev->keycode = hotkey_keycode_map;
3371 for (i = 0; i < TPACPI_HOTKEY_MAP_LEN; i++) {
3372 if (hotkey_keycode_map[i] != KEY_RESERVED) {
3373 input_set_capability(tpacpi_inputdev, EV_KEY,
3374 hotkey_keycode_map[i]);
3375 } else {
3376 if (i < sizeof(hotkey_reserved_mask)*8)
3377 hotkey_reserved_mask |= 1 << i;
3378 }
3379 }
3380
3381 if (tp_features.hotkey_wlsw) {
3382 input_set_capability(tpacpi_inputdev, EV_SW, SW_RFKILL_ALL);
3383 input_report_switch(tpacpi_inputdev,
3384 SW_RFKILL_ALL, radiosw_state);
3385 }
3386 if (tp_features.hotkey_tablet) {
3387 input_set_capability(tpacpi_inputdev, EV_SW, SW_TABLET_MODE);
3388 input_report_switch(tpacpi_inputdev,
3389 SW_TABLET_MODE, tabletsw_state);
3390 }
3391
3392 /* Do not issue duplicate brightness change events to
3393 * userspace */
3394 if (!tp_features.bright_acpimode)
3395 /* update bright_acpimode... */
3396 tpacpi_check_std_acpi_brightness_support();
3397
3398 if (tp_features.bright_acpimode && acpi_video_backlight_support()) {
3399 printk(TPACPI_INFO
3400 "This ThinkPad has standard ACPI backlight "
3401 "brightness control, supported by the ACPI "
3402 "video driver\n");
3403 printk(TPACPI_NOTICE
3404 "Disabling thinkpad-acpi brightness events "
3405 "by default...\n");
3406
3407 /* Disable brightness up/down on Lenovo thinkpads when
3408 * ACPI is handling them, otherwise it is plain impossible
3409 * for userspace to do something even remotely sane */
3410 hotkey_reserved_mask |=
3411 (1 << TP_ACPI_HOTKEYSCAN_FNHOME)
3412 | (1 << TP_ACPI_HOTKEYSCAN_FNEND);
3413 hotkey_unmap(TP_ACPI_HOTKEYSCAN_FNHOME);
3414 hotkey_unmap(TP_ACPI_HOTKEYSCAN_FNEND);
3415 }
3416
3417 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
3418 hotkey_source_mask = TPACPI_HKEY_NVRAM_GOOD_MASK
3419 & ~hotkey_all_mask
3420 & ~hotkey_reserved_mask;
3421
3422 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3423 "hotkey source mask 0x%08x, polling freq %u\n",
3424 hotkey_source_mask, hotkey_poll_freq);
3425 #endif
3426
3427 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3428 "enabling firmware HKEY event interface...\n");
3429 res = hotkey_status_set(true);
3430 if (res) {
3431 hotkey_exit();
3432 return res;
3433 }
3434 res = hotkey_mask_set(((hotkey_all_mask & ~hotkey_reserved_mask)
3435 | hotkey_driver_mask)
3436 & ~hotkey_source_mask);
3437 if (res < 0 && res != -ENXIO) {
3438 hotkey_exit();
3439 return res;
3440 }
3441 hotkey_user_mask = (hotkey_acpi_mask | hotkey_source_mask)
3442 & ~hotkey_reserved_mask;
3443 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3444 "initial masks: user=0x%08x, fw=0x%08x, poll=0x%08x\n",
3445 hotkey_user_mask, hotkey_acpi_mask, hotkey_source_mask);
3446
3447 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3448 "legacy ibm/hotkey event reporting over procfs %s\n",
3449 (hotkey_report_mode < 2) ?
3450 "enabled" : "disabled");
3451
3452 tpacpi_inputdev->open = &hotkey_inputdev_open;
3453 tpacpi_inputdev->close = &hotkey_inputdev_close;
3454
3455 hotkey_poll_setup_safe(true);
3456
3457 return 0;
3458
3459 err_exit:
3460 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
3461 hotkey_dev_attributes = NULL;
3462
3463 return (res < 0)? res : 1;
3464 }
3465
3466 static bool hotkey_notify_hotkey(const u32 hkey,
3467 bool *send_acpi_ev,
3468 bool *ignore_acpi_ev)
3469 {
3470 /* 0x1000-0x1FFF: key presses */
3471 unsigned int scancode = hkey & 0xfff;
3472 *send_acpi_ev = true;
3473 *ignore_acpi_ev = false;
3474
3475 if (scancode > 0 && scancode < 0x21) {
3476 scancode--;
3477 if (!(hotkey_source_mask & (1 << scancode))) {
3478 tpacpi_input_send_key_masked(scancode);
3479 *send_acpi_ev = false;
3480 } else {
3481 *ignore_acpi_ev = true;
3482 }
3483 return true;
3484 }
3485 return false;
3486 }
3487
3488 static bool hotkey_notify_wakeup(const u32 hkey,
3489 bool *send_acpi_ev,
3490 bool *ignore_acpi_ev)
3491 {
3492 /* 0x2000-0x2FFF: Wakeup reason */
3493 *send_acpi_ev = true;
3494 *ignore_acpi_ev = false;
3495
3496 switch (hkey) {
3497 case TP_HKEY_EV_WKUP_S3_UNDOCK: /* suspend, undock */
3498 case TP_HKEY_EV_WKUP_S4_UNDOCK: /* hibernation, undock */
3499 hotkey_wakeup_reason = TP_ACPI_WAKEUP_UNDOCK;
3500 *ignore_acpi_ev = true;
3501 break;
3502
3503 case TP_HKEY_EV_WKUP_S3_BAYEJ: /* suspend, bay eject */
3504 case TP_HKEY_EV_WKUP_S4_BAYEJ: /* hibernation, bay eject */
3505 hotkey_wakeup_reason = TP_ACPI_WAKEUP_BAYEJ;
3506 *ignore_acpi_ev = true;
3507 break;
3508
3509 case TP_HKEY_EV_WKUP_S3_BATLOW: /* Battery on critical low level/S3 */
3510 case TP_HKEY_EV_WKUP_S4_BATLOW: /* Battery on critical low level/S4 */
3511 printk(TPACPI_ALERT
3512 "EMERGENCY WAKEUP: battery almost empty\n");
3513 /* how to auto-heal: */
3514 /* 2313: woke up from S3, go to S4/S5 */
3515 /* 2413: woke up from S4, go to S5 */
3516 break;
3517
3518 default:
3519 return false;
3520 }
3521
3522 if (hotkey_wakeup_reason != TP_ACPI_WAKEUP_NONE) {
3523 printk(TPACPI_INFO
3524 "woke up due to a hot-unplug "
3525 "request...\n");
3526 hotkey_wakeup_reason_notify_change();
3527 }
3528 return true;
3529 }
3530
3531 static bool hotkey_notify_usrevent(const u32 hkey,
3532 bool *send_acpi_ev,
3533 bool *ignore_acpi_ev)
3534 {
3535 /* 0x5000-0x5FFF: human interface helpers */
3536 *send_acpi_ev = true;
3537 *ignore_acpi_ev = false;
3538
3539 switch (hkey) {
3540 case TP_HKEY_EV_PEN_INSERTED: /* X61t: tablet pen inserted into bay */
3541 case TP_HKEY_EV_PEN_REMOVED: /* X61t: tablet pen removed from bay */
3542 return true;
3543
3544 case TP_HKEY_EV_TABLET_TABLET: /* X41t-X61t: tablet mode */
3545 case TP_HKEY_EV_TABLET_NOTEBOOK: /* X41t-X61t: normal mode */
3546 tpacpi_input_send_tabletsw();
3547 hotkey_tablet_mode_notify_change();
3548 *send_acpi_ev = false;
3549 return true;
3550
3551 case TP_HKEY_EV_LID_CLOSE: /* Lid closed */
3552 case TP_HKEY_EV_LID_OPEN: /* Lid opened */
3553 case TP_HKEY_EV_BRGHT_CHANGED: /* brightness changed */
3554 /* do not propagate these events */
3555 *ignore_acpi_ev = true;
3556 return true;
3557
3558 default:
3559 return false;
3560 }
3561 }
3562
3563 static void thermal_dump_all_sensors(void);
3564
3565 static bool hotkey_notify_thermal(const u32 hkey,
3566 bool *send_acpi_ev,
3567 bool *ignore_acpi_ev)
3568 {
3569 bool known = true;
3570
3571 /* 0x6000-0x6FFF: thermal alarms */
3572 *send_acpi_ev = true;
3573 *ignore_acpi_ev = false;
3574
3575 switch (hkey) {
3576 case TP_HKEY_EV_THM_TABLE_CHANGED:
3577 printk(TPACPI_INFO
3578 "EC reports that Thermal Table has changed\n");
3579 /* recommended action: do nothing, we don't have
3580 * Lenovo ATM information */
3581 return true;
3582 case TP_HKEY_EV_ALARM_BAT_HOT:
3583 printk(TPACPI_CRIT
3584 "THERMAL ALARM: battery is too hot!\n");
3585 /* recommended action: warn user through gui */
3586 break;
3587 case TP_HKEY_EV_ALARM_BAT_XHOT:
3588 printk(TPACPI_ALERT
3589 "THERMAL EMERGENCY: battery is extremely hot!\n");
3590 /* recommended action: immediate sleep/hibernate */
3591 break;
3592 case TP_HKEY_EV_ALARM_SENSOR_HOT:
3593 printk(TPACPI_CRIT
3594 "THERMAL ALARM: "
3595 "a sensor reports something is too hot!\n");
3596 /* recommended action: warn user through gui, that */
3597 /* some internal component is too hot */
3598 break;
3599 case TP_HKEY_EV_ALARM_SENSOR_XHOT:
3600 printk(TPACPI_ALERT
3601 "THERMAL EMERGENCY: "
3602 "a sensor reports something is extremely hot!\n");
3603 /* recommended action: immediate sleep/hibernate */
3604 break;
3605 default:
3606 printk(TPACPI_ALERT
3607 "THERMAL ALERT: unknown thermal alarm received\n");
3608 known = false;
3609 }
3610
3611 thermal_dump_all_sensors();
3612
3613 return known;
3614 }
3615
3616 static void hotkey_notify(struct ibm_struct *ibm, u32 event)
3617 {
3618 u32 hkey;
3619 bool send_acpi_ev;
3620 bool ignore_acpi_ev;
3621 bool known_ev;
3622
3623 if (event != 0x80) {
3624 printk(TPACPI_ERR
3625 "unknown HKEY notification event %d\n", event);
3626 /* forward it to userspace, maybe it knows how to handle it */
3627 acpi_bus_generate_netlink_event(
3628 ibm->acpi->device->pnp.device_class,
3629 dev_name(&ibm->acpi->device->dev),
3630 event, 0);
3631 return;
3632 }
3633
3634 while (1) {
3635 if (!acpi_evalf(hkey_handle, &hkey, "MHKP", "d")) {
3636 printk(TPACPI_ERR "failed to retrieve HKEY event\n");
3637 return;
3638 }
3639
3640 if (hkey == 0) {
3641 /* queue empty */
3642 return;
3643 }
3644
3645 send_acpi_ev = true;
3646 ignore_acpi_ev = false;
3647
3648 switch (hkey >> 12) {
3649 case 1:
3650 /* 0x1000-0x1FFF: key presses */
3651 known_ev = hotkey_notify_hotkey(hkey, &send_acpi_ev,
3652 &ignore_acpi_ev);
3653 break;
3654 case 2:
3655 /* 0x2000-0x2FFF: Wakeup reason */
3656 known_ev = hotkey_notify_wakeup(hkey, &send_acpi_ev,
3657 &ignore_acpi_ev);
3658 break;
3659 case 3:
3660 /* 0x3000-0x3FFF: bay-related wakeups */
3661 switch (hkey) {
3662 case TP_HKEY_EV_BAYEJ_ACK:
3663 hotkey_autosleep_ack = 1;
3664 printk(TPACPI_INFO
3665 "bay ejected\n");
3666 hotkey_wakeup_hotunplug_complete_notify_change();
3667 known_ev = true;
3668 break;
3669 case TP_HKEY_EV_OPTDRV_EJ:
3670 /* FIXME: kick libata if SATA link offline */
3671 known_ev = true;
3672 break;
3673 default:
3674 known_ev = false;
3675 }
3676 break;
3677 case 4:
3678 /* 0x4000-0x4FFF: dock-related wakeups */
3679 if (hkey == TP_HKEY_EV_UNDOCK_ACK) {
3680 hotkey_autosleep_ack = 1;
3681 printk(TPACPI_INFO
3682 "undocked\n");
3683 hotkey_wakeup_hotunplug_complete_notify_change();
3684 known_ev = true;
3685 } else {
3686 known_ev = false;
3687 }
3688 break;
3689 case 5:
3690 /* 0x5000-0x5FFF: human interface helpers */
3691 known_ev = hotkey_notify_usrevent(hkey, &send_acpi_ev,
3692 &ignore_acpi_ev);
3693 break;
3694 case 6:
3695 /* 0x6000-0x6FFF: thermal alarms */
3696 known_ev = hotkey_notify_thermal(hkey, &send_acpi_ev,
3697 &ignore_acpi_ev);
3698 break;
3699 case 7:
3700 /* 0x7000-0x7FFF: misc */
3701 if (tp_features.hotkey_wlsw &&
3702 hkey == TP_HKEY_EV_RFKILL_CHANGED) {
3703 tpacpi_send_radiosw_update();
3704 send_acpi_ev = 0;
3705 known_ev = true;
3706 break;
3707 }
3708 /* fallthrough to default */
3709 default:
3710 known_ev = false;
3711 }
3712 if (!known_ev) {
3713 printk(TPACPI_NOTICE
3714 "unhandled HKEY event 0x%04x\n", hkey);
3715 printk(TPACPI_NOTICE
3716 "please report the conditions when this "
3717 "event happened to %s\n", TPACPI_MAIL);
3718 }
3719
3720 /* Legacy events */
3721 if (!ignore_acpi_ev &&
3722 (send_acpi_ev || hotkey_report_mode < 2)) {
3723 acpi_bus_generate_proc_event(ibm->acpi->device,
3724 event, hkey);
3725 }
3726
3727 /* netlink events */
3728 if (!ignore_acpi_ev && send_acpi_ev) {
3729 acpi_bus_generate_netlink_event(
3730 ibm->acpi->device->pnp.device_class,
3731 dev_name(&ibm->acpi->device->dev),
3732 event, hkey);
3733 }
3734 }
3735 }
3736
3737 static void hotkey_suspend(pm_message_t state)
3738 {
3739 /* Do these on suspend, we get the events on early resume! */
3740 hotkey_wakeup_reason = TP_ACPI_WAKEUP_NONE;
3741 hotkey_autosleep_ack = 0;
3742 }
3743
3744 static void hotkey_resume(void)
3745 {
3746 tpacpi_disable_brightness_delay();
3747
3748 if (hotkey_status_set(true) < 0 ||
3749 hotkey_mask_set(hotkey_acpi_mask) < 0)
3750 printk(TPACPI_ERR
3751 "error while attempting to reset the event "
3752 "firmware interface\n");
3753
3754 tpacpi_send_radiosw_update();
3755 hotkey_tablet_mode_notify_change();
3756 hotkey_wakeup_reason_notify_change();
3757 hotkey_wakeup_hotunplug_complete_notify_change();
3758 hotkey_poll_setup_safe(false);
3759 }
3760
3761 /* procfs -------------------------------------------------------------- */
3762 static int hotkey_read(struct seq_file *m)
3763 {
3764 int res, status;
3765
3766 if (!tp_features.hotkey) {
3767 seq_printf(m, "status:\t\tnot supported\n");
3768 return 0;
3769 }
3770
3771 if (mutex_lock_killable(&hotkey_mutex))
3772 return -ERESTARTSYS;
3773 res = hotkey_status_get(&status);
3774 if (!res)
3775 res = hotkey_mask_get();
3776 mutex_unlock(&hotkey_mutex);
3777 if (res)
3778 return res;
3779
3780 seq_printf(m, "status:\t\t%s\n", enabled(status, 0));
3781 if (hotkey_all_mask) {
3782 seq_printf(m, "mask:\t\t0x%08x\n", hotkey_user_mask);
3783 seq_printf(m, "commands:\tenable, disable, reset, <mask>\n");
3784 } else {
3785 seq_printf(m, "mask:\t\tnot supported\n");
3786 seq_printf(m, "commands:\tenable, disable, reset\n");
3787 }
3788
3789 return 0;
3790 }
3791
3792 static void hotkey_enabledisable_warn(bool enable)
3793 {
3794 tpacpi_log_usertask("procfs hotkey enable/disable");
3795 if (!WARN((tpacpi_lifecycle == TPACPI_LIFE_RUNNING || !enable),
3796 TPACPI_WARN
3797 "hotkey enable/disable functionality has been "
3798 "removed from the driver. Hotkeys are always "
3799 "enabled\n"))
3800 printk(TPACPI_ERR
3801 "Please remove the hotkey=enable module "
3802 "parameter, it is deprecated. Hotkeys are always "
3803 "enabled\n");
3804 }
3805
3806 static int hotkey_write(char *buf)
3807 {
3808 int res;
3809 u32 mask;
3810 char *cmd;
3811
3812 if (!tp_features.hotkey)
3813 return -ENODEV;
3814
3815 if (mutex_lock_killable(&hotkey_mutex))
3816 return -ERESTARTSYS;
3817
3818 mask = hotkey_user_mask;
3819
3820 res = 0;
3821 while ((cmd = next_cmd(&buf))) {
3822 if (strlencmp(cmd, "enable") == 0) {
3823 hotkey_enabledisable_warn(1);
3824 } else if (strlencmp(cmd, "disable") == 0) {
3825 hotkey_enabledisable_warn(0);
3826 res = -EPERM;
3827 } else if (strlencmp(cmd, "reset") == 0) {
3828 mask = (hotkey_all_mask | hotkey_source_mask)
3829 & ~hotkey_reserved_mask;
3830 } else if (sscanf(cmd, "0x%x", &mask) == 1) {
3831 /* mask set */
3832 } else if (sscanf(cmd, "%x", &mask) == 1) {
3833 /* mask set */
3834 } else {
3835 res = -EINVAL;
3836 goto errexit;
3837 }
3838 }
3839
3840 if (!res) {
3841 tpacpi_disclose_usertask("procfs hotkey",
3842 "set mask to 0x%08x\n", mask);
3843 res = hotkey_user_mask_set(mask);
3844 }
3845
3846 errexit:
3847 mutex_unlock(&hotkey_mutex);
3848 return res;
3849 }
3850
3851 static const struct acpi_device_id ibm_htk_device_ids[] = {
3852 {TPACPI_ACPI_HKEY_HID, 0},
3853 {"", 0},
3854 };
3855
3856 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver = {
3857 .hid = ibm_htk_device_ids,
3858 .notify = hotkey_notify,
3859 .handle = &hkey_handle,
3860 .type = ACPI_DEVICE_NOTIFY,
3861 };
3862
3863 static struct ibm_struct hotkey_driver_data = {
3864 .name = "hotkey",
3865 .read = hotkey_read,
3866 .write = hotkey_write,
3867 .exit = hotkey_exit,
3868 .resume = hotkey_resume,
3869 .suspend = hotkey_suspend,
3870 .acpi = &ibm_hotkey_acpidriver,
3871 };
3872
3873 /*************************************************************************
3874 * Bluetooth subdriver
3875 */
3876
3877 enum {
3878 /* ACPI GBDC/SBDC bits */
3879 TP_ACPI_BLUETOOTH_HWPRESENT = 0x01, /* Bluetooth hw available */
3880 TP_ACPI_BLUETOOTH_RADIOSSW = 0x02, /* Bluetooth radio enabled */
3881 TP_ACPI_BLUETOOTH_RESUMECTRL = 0x04, /* Bluetooth state at resume:
3882 0 = disable, 1 = enable */
3883 };
3884
3885 enum {
3886 /* ACPI \BLTH commands */
3887 TP_ACPI_BLTH_GET_ULTRAPORT_ID = 0x00, /* Get Ultraport BT ID */
3888 TP_ACPI_BLTH_GET_PWR_ON_RESUME = 0x01, /* Get power-on-resume state */
3889 TP_ACPI_BLTH_PWR_ON_ON_RESUME = 0x02, /* Resume powered on */
3890 TP_ACPI_BLTH_PWR_OFF_ON_RESUME = 0x03, /* Resume powered off */
3891 TP_ACPI_BLTH_SAVE_STATE = 0x05, /* Save state for S4/S5 */
3892 };
3893
3894 #define TPACPI_RFK_BLUETOOTH_SW_NAME "tpacpi_bluetooth_sw"
3895
3896 static int bluetooth_get_status(void)
3897 {
3898 int status;
3899
3900 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3901 if (dbg_bluetoothemul)
3902 return (tpacpi_bluetooth_emulstate) ?
3903 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
3904 #endif
3905
3906 if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
3907 return -EIO;
3908
3909 return ((status & TP_ACPI_BLUETOOTH_RADIOSSW) != 0) ?
3910 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
3911 }
3912
3913 static int bluetooth_set_status(enum tpacpi_rfkill_state state)
3914 {
3915 int status;
3916
3917 vdbg_printk(TPACPI_DBG_RFKILL,
3918 "will attempt to %s bluetooth\n",
3919 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable");
3920
3921 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3922 if (dbg_bluetoothemul) {
3923 tpacpi_bluetooth_emulstate = (state == TPACPI_RFK_RADIO_ON);
3924 return 0;
3925 }
3926 #endif
3927
3928 if (state == TPACPI_RFK_RADIO_ON)
3929 status = TP_ACPI_BLUETOOTH_RADIOSSW
3930 | TP_ACPI_BLUETOOTH_RESUMECTRL;
3931 else
3932 status = 0;
3933
3934 if (!acpi_evalf(hkey_handle, NULL, "SBDC", "vd", status))
3935 return -EIO;
3936
3937 return 0;
3938 }
3939
3940 /* sysfs bluetooth enable ---------------------------------------------- */
3941 static ssize_t bluetooth_enable_show(struct device *dev,
3942 struct device_attribute *attr,
3943 char *buf)
3944 {
3945 return tpacpi_rfk_sysfs_enable_show(TPACPI_RFK_BLUETOOTH_SW_ID,
3946 attr, buf);
3947 }
3948
3949 static ssize_t bluetooth_enable_store(struct device *dev,
3950 struct device_attribute *attr,
3951 const char *buf, size_t count)
3952 {
3953 return tpacpi_rfk_sysfs_enable_store(TPACPI_RFK_BLUETOOTH_SW_ID,
3954 attr, buf, count);
3955 }
3956
3957 static struct device_attribute dev_attr_bluetooth_enable =
3958 __ATTR(bluetooth_enable, S_IWUSR | S_IRUGO,
3959 bluetooth_enable_show, bluetooth_enable_store);
3960
3961 /* --------------------------------------------------------------------- */
3962
3963 static struct attribute *bluetooth_attributes[] = {
3964 &dev_attr_bluetooth_enable.attr,
3965 NULL
3966 };
3967
3968 static const struct attribute_group bluetooth_attr_group = {
3969 .attrs = bluetooth_attributes,
3970 };
3971
3972 static const struct tpacpi_rfk_ops bluetooth_tprfk_ops = {
3973 .get_status = bluetooth_get_status,
3974 .set_status = bluetooth_set_status,
3975 };
3976
3977 static void bluetooth_shutdown(void)
3978 {
3979 /* Order firmware to save current state to NVRAM */
3980 if (!acpi_evalf(NULL, NULL, "\\BLTH", "vd",
3981 TP_ACPI_BLTH_SAVE_STATE))
3982 printk(TPACPI_NOTICE
3983 "failed to save bluetooth state to NVRAM\n");
3984 else
3985 vdbg_printk(TPACPI_DBG_RFKILL,
3986 "bluestooth state saved to NVRAM\n");
3987 }
3988
3989 static void bluetooth_exit(void)
3990 {
3991 sysfs_remove_group(&tpacpi_pdev->dev.kobj,
3992 &bluetooth_attr_group);
3993
3994 tpacpi_destroy_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID);
3995
3996 bluetooth_shutdown();
3997 }
3998
3999 static int __init bluetooth_init(struct ibm_init_struct *iibm)
4000 {
4001 int res;
4002 int status = 0;
4003
4004 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4005 "initializing bluetooth subdriver\n");
4006
4007 TPACPI_ACPIHANDLE_INIT(hkey);
4008
4009 /* bluetooth not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
4010 G4x, R30, R31, R40e, R50e, T20-22, X20-21 */
4011 tp_features.bluetooth = hkey_handle &&
4012 acpi_evalf(hkey_handle, &status, "GBDC", "qd");
4013
4014 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4015 "bluetooth is %s, status 0x%02x\n",
4016 str_supported(tp_features.bluetooth),
4017 status);
4018
4019 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4020 if (dbg_bluetoothemul) {
4021 tp_features.bluetooth = 1;
4022 printk(TPACPI_INFO
4023 "bluetooth switch emulation enabled\n");
4024 } else
4025 #endif
4026 if (tp_features.bluetooth &&
4027 !(status & TP_ACPI_BLUETOOTH_HWPRESENT)) {
4028 /* no bluetooth hardware present in system */
4029 tp_features.bluetooth = 0;
4030 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4031 "bluetooth hardware not installed\n");
4032 }
4033
4034 if (!tp_features.bluetooth)
4035 return 1;
4036
4037 res = tpacpi_new_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID,
4038 &bluetooth_tprfk_ops,
4039 RFKILL_TYPE_BLUETOOTH,
4040 TPACPI_RFK_BLUETOOTH_SW_NAME,
4041 true);
4042 if (res)
4043 return res;
4044
4045 res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
4046 &bluetooth_attr_group);
4047 if (res) {
4048 tpacpi_destroy_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID);
4049 return res;
4050 }
4051
4052 return 0;
4053 }
4054
4055 /* procfs -------------------------------------------------------------- */
4056 static int bluetooth_read(struct seq_file *m)
4057 {
4058 return tpacpi_rfk_procfs_read(TPACPI_RFK_BLUETOOTH_SW_ID, m);
4059 }
4060
4061 static int bluetooth_write(char *buf)
4062 {
4063 return tpacpi_rfk_procfs_write(TPACPI_RFK_BLUETOOTH_SW_ID, buf);
4064 }
4065
4066 static struct ibm_struct bluetooth_driver_data = {
4067 .name = "bluetooth",
4068 .read = bluetooth_read,
4069 .write = bluetooth_write,
4070 .exit = bluetooth_exit,
4071 .shutdown = bluetooth_shutdown,
4072 };
4073
4074 /*************************************************************************
4075 * Wan subdriver
4076 */
4077
4078 enum {
4079 /* ACPI GWAN/SWAN bits */
4080 TP_ACPI_WANCARD_HWPRESENT = 0x01, /* Wan hw available */
4081 TP_ACPI_WANCARD_RADIOSSW = 0x02, /* Wan radio enabled */
4082 TP_ACPI_WANCARD_RESUMECTRL = 0x04, /* Wan state at resume:
4083 0 = disable, 1 = enable */
4084 };
4085
4086 #define TPACPI_RFK_WWAN_SW_NAME "tpacpi_wwan_sw"
4087
4088 static int wan_get_status(void)
4089 {
4090 int status;
4091
4092 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4093 if (dbg_wwanemul)
4094 return (tpacpi_wwan_emulstate) ?
4095 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4096 #endif
4097
4098 if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
4099 return -EIO;
4100
4101 return ((status & TP_ACPI_WANCARD_RADIOSSW) != 0) ?
4102 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4103 }
4104
4105 static int wan_set_status(enum tpacpi_rfkill_state state)
4106 {
4107 int status;
4108
4109 vdbg_printk(TPACPI_DBG_RFKILL,
4110 "will attempt to %s wwan\n",
4111 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable");
4112
4113 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4114 if (dbg_wwanemul) {
4115 tpacpi_wwan_emulstate = (state == TPACPI_RFK_RADIO_ON);
4116 return 0;
4117 }
4118 #endif
4119
4120 if (state == TPACPI_RFK_RADIO_ON)
4121 status = TP_ACPI_WANCARD_RADIOSSW
4122 | TP_ACPI_WANCARD_RESUMECTRL;
4123 else
4124 status = 0;
4125
4126 if (!acpi_evalf(hkey_handle, NULL, "SWAN", "vd", status))
4127 return -EIO;
4128
4129 return 0;
4130 }
4131
4132 /* sysfs wan enable ---------------------------------------------------- */
4133 static ssize_t wan_enable_show(struct device *dev,
4134 struct device_attribute *attr,
4135 char *buf)
4136 {
4137 return tpacpi_rfk_sysfs_enable_show(TPACPI_RFK_WWAN_SW_ID,
4138 attr, buf);
4139 }
4140
4141 static ssize_t wan_enable_store(struct device *dev,
4142 struct device_attribute *attr,
4143 const char *buf, size_t count)
4144 {
4145 return tpacpi_rfk_sysfs_enable_store(TPACPI_RFK_WWAN_SW_ID,
4146 attr, buf, count);
4147 }
4148
4149 static struct device_attribute dev_attr_wan_enable =
4150 __ATTR(wwan_enable, S_IWUSR | S_IRUGO,
4151 wan_enable_show, wan_enable_store);
4152
4153 /* --------------------------------------------------------------------- */
4154
4155 static struct attribute *wan_attributes[] = {
4156 &dev_attr_wan_enable.attr,
4157 NULL
4158 };
4159
4160 static const struct attribute_group wan_attr_group = {
4161 .attrs = wan_attributes,
4162 };
4163
4164 static const struct tpacpi_rfk_ops wan_tprfk_ops = {
4165 .get_status = wan_get_status,
4166 .set_status = wan_set_status,
4167 };
4168
4169 static void wan_shutdown(void)
4170 {
4171 /* Order firmware to save current state to NVRAM */
4172 if (!acpi_evalf(NULL, NULL, "\\WGSV", "vd",
4173 TP_ACPI_WGSV_SAVE_STATE))
4174 printk(TPACPI_NOTICE
4175 "failed to save WWAN state to NVRAM\n");
4176 else
4177 vdbg_printk(TPACPI_DBG_RFKILL,
4178 "WWAN state saved to NVRAM\n");
4179 }
4180
4181 static void wan_exit(void)
4182 {
4183 sysfs_remove_group(&tpacpi_pdev->dev.kobj,
4184 &wan_attr_group);
4185
4186 tpacpi_destroy_rfkill(TPACPI_RFK_WWAN_SW_ID);
4187
4188 wan_shutdown();
4189 }
4190
4191 static int __init wan_init(struct ibm_init_struct *iibm)
4192 {
4193 int res;
4194 int status = 0;
4195
4196 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4197 "initializing wan subdriver\n");
4198
4199 TPACPI_ACPIHANDLE_INIT(hkey);
4200
4201 tp_features.wan = hkey_handle &&
4202 acpi_evalf(hkey_handle, &status, "GWAN", "qd");
4203
4204 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4205 "wan is %s, status 0x%02x\n",
4206 str_supported(tp_features.wan),
4207 status);
4208
4209 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4210 if (dbg_wwanemul) {
4211 tp_features.wan = 1;
4212 printk(TPACPI_INFO
4213 "wwan switch emulation enabled\n");
4214 } else
4215 #endif
4216 if (tp_features.wan &&
4217 !(status & TP_ACPI_WANCARD_HWPRESENT)) {
4218 /* no wan hardware present in system */
4219 tp_features.wan = 0;
4220 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4221 "wan hardware not installed\n");
4222 }
4223
4224 if (!tp_features.wan)
4225 return 1;
4226
4227 res = tpacpi_new_rfkill(TPACPI_RFK_WWAN_SW_ID,
4228 &wan_tprfk_ops,
4229 RFKILL_TYPE_WWAN,
4230 TPACPI_RFK_WWAN_SW_NAME,
4231 true);
4232 if (res)
4233 return res;
4234
4235 res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
4236 &wan_attr_group);
4237
4238 if (res) {
4239 tpacpi_destroy_rfkill(TPACPI_RFK_WWAN_SW_ID);
4240 return res;
4241 }
4242
4243 return 0;
4244 }
4245
4246 /* procfs -------------------------------------------------------------- */
4247 static int wan_read(struct seq_file *m)
4248 {
4249 return tpacpi_rfk_procfs_read(TPACPI_RFK_WWAN_SW_ID, m);
4250 }
4251
4252 static int wan_write(char *buf)
4253 {
4254 return tpacpi_rfk_procfs_write(TPACPI_RFK_WWAN_SW_ID, buf);
4255 }
4256
4257 static struct ibm_struct wan_driver_data = {
4258 .name = "wan",
4259 .read = wan_read,
4260 .write = wan_write,
4261 .exit = wan_exit,
4262 .shutdown = wan_shutdown,
4263 };
4264
4265 /*************************************************************************
4266 * UWB subdriver
4267 */
4268
4269 enum {
4270 /* ACPI GUWB/SUWB bits */
4271 TP_ACPI_UWB_HWPRESENT = 0x01, /* UWB hw available */
4272 TP_ACPI_UWB_RADIOSSW = 0x02, /* UWB radio enabled */
4273 };
4274
4275 #define TPACPI_RFK_UWB_SW_NAME "tpacpi_uwb_sw"
4276
4277 static int uwb_get_status(void)
4278 {
4279 int status;
4280
4281 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4282 if (dbg_uwbemul)
4283 return (tpacpi_uwb_emulstate) ?
4284 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4285 #endif
4286
4287 if (!acpi_evalf(hkey_handle, &status, "GUWB", "d"))
4288 return -EIO;
4289
4290 return ((status & TP_ACPI_UWB_RADIOSSW) != 0) ?
4291 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4292 }
4293
4294 static int uwb_set_status(enum tpacpi_rfkill_state state)
4295 {
4296 int status;
4297
4298 vdbg_printk(TPACPI_DBG_RFKILL,
4299 "will attempt to %s UWB\n",
4300 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable");
4301
4302 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4303 if (dbg_uwbemul) {
4304 tpacpi_uwb_emulstate = (state == TPACPI_RFK_RADIO_ON);
4305 return 0;
4306 }
4307 #endif
4308
4309 if (state == TPACPI_RFK_RADIO_ON)
4310 status = TP_ACPI_UWB_RADIOSSW;
4311 else
4312 status = 0;
4313
4314 if (!acpi_evalf(hkey_handle, NULL, "SUWB", "vd", status))
4315 return -EIO;
4316
4317 return 0;
4318 }
4319
4320 /* --------------------------------------------------------------------- */
4321
4322 static const struct tpacpi_rfk_ops uwb_tprfk_ops = {
4323 .get_status = uwb_get_status,
4324 .set_status = uwb_set_status,
4325 };
4326
4327 static void uwb_exit(void)
4328 {
4329 tpacpi_destroy_rfkill(TPACPI_RFK_UWB_SW_ID);
4330 }
4331
4332 static int __init uwb_init(struct ibm_init_struct *iibm)
4333 {
4334 int res;
4335 int status = 0;
4336
4337 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4338 "initializing uwb subdriver\n");
4339
4340 TPACPI_ACPIHANDLE_INIT(hkey);
4341
4342 tp_features.uwb = hkey_handle &&
4343 acpi_evalf(hkey_handle, &status, "GUWB", "qd");
4344
4345 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4346 "uwb is %s, status 0x%02x\n",
4347 str_supported(tp_features.uwb),
4348 status);
4349
4350 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4351 if (dbg_uwbemul) {
4352 tp_features.uwb = 1;
4353 printk(TPACPI_INFO
4354 "uwb switch emulation enabled\n");
4355 } else
4356 #endif
4357 if (tp_features.uwb &&
4358 !(status & TP_ACPI_UWB_HWPRESENT)) {
4359 /* no uwb hardware present in system */
4360 tp_features.uwb = 0;
4361 dbg_printk(TPACPI_DBG_INIT,
4362 "uwb hardware not installed\n");
4363 }
4364
4365 if (!tp_features.uwb)
4366 return 1;
4367
4368 res = tpacpi_new_rfkill(TPACPI_RFK_UWB_SW_ID,
4369 &uwb_tprfk_ops,
4370 RFKILL_TYPE_UWB,
4371 TPACPI_RFK_UWB_SW_NAME,
4372 false);
4373 return res;
4374 }
4375
4376 static struct ibm_struct uwb_driver_data = {
4377 .name = "uwb",
4378 .exit = uwb_exit,
4379 .flags.experimental = 1,
4380 };
4381
4382 /*************************************************************************
4383 * Video subdriver
4384 */
4385
4386 #ifdef CONFIG_THINKPAD_ACPI_VIDEO
4387
4388 enum video_access_mode {
4389 TPACPI_VIDEO_NONE = 0,
4390 TPACPI_VIDEO_570, /* 570 */
4391 TPACPI_VIDEO_770, /* 600e/x, 770e, 770x */
4392 TPACPI_VIDEO_NEW, /* all others */
4393 };
4394
4395 enum { /* video status flags, based on VIDEO_570 */
4396 TP_ACPI_VIDEO_S_LCD = 0x01, /* LCD output enabled */
4397 TP_ACPI_VIDEO_S_CRT = 0x02, /* CRT output enabled */
4398 TP_ACPI_VIDEO_S_DVI = 0x08, /* DVI output enabled */
4399 };
4400
4401 enum { /* TPACPI_VIDEO_570 constants */
4402 TP_ACPI_VIDEO_570_PHSCMD = 0x87, /* unknown magic constant :( */
4403 TP_ACPI_VIDEO_570_PHSMASK = 0x03, /* PHS bits that map to
4404 * video_status_flags */
4405 TP_ACPI_VIDEO_570_PHS2CMD = 0x8b, /* unknown magic constant :( */
4406 TP_ACPI_VIDEO_570_PHS2SET = 0x80, /* unknown magic constant :( */
4407 };
4408
4409 static enum video_access_mode video_supported;
4410 static int video_orig_autosw;
4411
4412 static int video_autosw_get(void);
4413 static int video_autosw_set(int enable);
4414
4415 TPACPI_HANDLE(vid2, root, "\\_SB.PCI0.AGPB.VID"); /* G41 */
4416
4417 static int __init video_init(struct ibm_init_struct *iibm)
4418 {
4419 int ivga;
4420
4421 vdbg_printk(TPACPI_DBG_INIT, "initializing video subdriver\n");
4422
4423 TPACPI_ACPIHANDLE_INIT(vid);
4424 TPACPI_ACPIHANDLE_INIT(vid2);
4425
4426 if (vid2_handle && acpi_evalf(NULL, &ivga, "\\IVGA", "d") && ivga)
4427 /* G41, assume IVGA doesn't change */
4428 vid_handle = vid2_handle;
4429
4430 if (!vid_handle)
4431 /* video switching not supported on R30, R31 */
4432 video_supported = TPACPI_VIDEO_NONE;
4433 else if (acpi_evalf(vid_handle, &video_orig_autosw, "SWIT", "qd"))
4434 /* 570 */
4435 video_supported = TPACPI_VIDEO_570;
4436 else if (acpi_evalf(vid_handle, &video_orig_autosw, "^VADL", "qd"))
4437 /* 600e/x, 770e, 770x */
4438 video_supported = TPACPI_VIDEO_770;
4439 else
4440 /* all others */
4441 video_supported = TPACPI_VIDEO_NEW;
4442
4443 vdbg_printk(TPACPI_DBG_INIT, "video is %s, mode %d\n",
4444 str_supported(video_supported != TPACPI_VIDEO_NONE),
4445 video_supported);
4446
4447 return (video_supported != TPACPI_VIDEO_NONE)? 0 : 1;
4448 }
4449
4450 static void video_exit(void)
4451 {
4452 dbg_printk(TPACPI_DBG_EXIT,
4453 "restoring original video autoswitch mode\n");
4454 if (video_autosw_set(video_orig_autosw))
4455 printk(TPACPI_ERR "error while trying to restore original "
4456 "video autoswitch mode\n");
4457 }
4458
4459 static int video_outputsw_get(void)
4460 {
4461 int status = 0;
4462 int i;
4463
4464 switch (video_supported) {
4465 case TPACPI_VIDEO_570:
4466 if (!acpi_evalf(NULL, &i, "\\_SB.PHS", "dd",
4467 TP_ACPI_VIDEO_570_PHSCMD))
4468 return -EIO;
4469 status = i & TP_ACPI_VIDEO_570_PHSMASK;
4470 break;
4471 case TPACPI_VIDEO_770:
4472 if (!acpi_evalf(NULL, &i, "\\VCDL", "d"))
4473 return -EIO;
4474 if (i)
4475 status |= TP_ACPI_VIDEO_S_LCD;
4476 if (!acpi_evalf(NULL, &i, "\\VCDC", "d"))
4477 return -EIO;
4478 if (i)
4479 status |= TP_ACPI_VIDEO_S_CRT;
4480 break;
4481 case TPACPI_VIDEO_NEW:
4482 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 1) ||
4483 !acpi_evalf(NULL, &i, "\\VCDC", "d"))
4484 return -EIO;
4485 if (i)
4486 status |= TP_ACPI_VIDEO_S_CRT;
4487
4488 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0) ||
4489 !acpi_evalf(NULL, &i, "\\VCDL", "d"))
4490 return -EIO;
4491 if (i)
4492 status |= TP_ACPI_VIDEO_S_LCD;
4493 if (!acpi_evalf(NULL, &i, "\\VCDD", "d"))
4494 return -EIO;
4495 if (i)
4496 status |= TP_ACPI_VIDEO_S_DVI;
4497 break;
4498 default:
4499 return -ENOSYS;
4500 }
4501
4502 return status;
4503 }
4504
4505 static int video_outputsw_set(int status)
4506 {
4507 int autosw;
4508 int res = 0;
4509
4510 switch (video_supported) {
4511 case TPACPI_VIDEO_570:
4512 res = acpi_evalf(NULL, NULL,
4513 "\\_SB.PHS2", "vdd",
4514 TP_ACPI_VIDEO_570_PHS2CMD,
4515 status | TP_ACPI_VIDEO_570_PHS2SET);
4516 break;
4517 case TPACPI_VIDEO_770:
4518 autosw = video_autosw_get();
4519 if (autosw < 0)
4520 return autosw;
4521
4522 res = video_autosw_set(1);
4523 if (res)
4524 return res;
4525 res = acpi_evalf(vid_handle, NULL,
4526 "ASWT", "vdd", status * 0x100, 0);
4527 if (!autosw && video_autosw_set(autosw)) {
4528 printk(TPACPI_ERR
4529 "video auto-switch left enabled due to error\n");
4530 return -EIO;
4531 }
4532 break;
4533 case TPACPI_VIDEO_NEW:
4534 res = acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0x80) &&
4535 acpi_evalf(NULL, NULL, "\\VSDS", "vdd", status, 1);
4536 break;
4537 default:
4538 return -ENOSYS;
4539 }
4540
4541 return (res)? 0 : -EIO;
4542 }
4543
4544 static int video_autosw_get(void)
4545 {
4546 int autosw = 0;
4547
4548 switch (video_supported) {
4549 case TPACPI_VIDEO_570:
4550 if (!acpi_evalf(vid_handle, &autosw, "SWIT", "d"))
4551 return -EIO;
4552 break;
4553 case TPACPI_VIDEO_770:
4554 case TPACPI_VIDEO_NEW:
4555 if (!acpi_evalf(vid_handle, &autosw, "^VDEE", "d"))
4556 return -EIO;
4557 break;
4558 default:
4559 return -ENOSYS;
4560 }
4561
4562 return autosw & 1;
4563 }
4564
4565 static int video_autosw_set(int enable)
4566 {
4567 if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", (enable)? 1 : 0))
4568 return -EIO;
4569 return 0;
4570 }
4571
4572 static int video_outputsw_cycle(void)
4573 {
4574 int autosw = video_autosw_get();
4575 int res;
4576
4577 if (autosw < 0)
4578 return autosw;
4579
4580 switch (video_supported) {
4581 case TPACPI_VIDEO_570:
4582 res = video_autosw_set(1);
4583 if (res)
4584 return res;
4585 res = acpi_evalf(ec_handle, NULL, "_Q16", "v");
4586 break;
4587 case TPACPI_VIDEO_770:
4588 case TPACPI_VIDEO_NEW:
4589 res = video_autosw_set(1);
4590 if (res)
4591 return res;
4592 res = acpi_evalf(vid_handle, NULL, "VSWT", "v");
4593 break;
4594 default:
4595 return -ENOSYS;
4596 }
4597 if (!autosw && video_autosw_set(autosw)) {
4598 printk(TPACPI_ERR
4599 "video auto-switch left enabled due to error\n");
4600 return -EIO;
4601 }
4602
4603 return (res)? 0 : -EIO;
4604 }
4605
4606 static int video_expand_toggle(void)
4607 {
4608 switch (video_supported) {
4609 case TPACPI_VIDEO_570:
4610 return acpi_evalf(ec_handle, NULL, "_Q17", "v")?
4611 0 : -EIO;
4612 case TPACPI_VIDEO_770:
4613 return acpi_evalf(vid_handle, NULL, "VEXP", "v")?
4614 0 : -EIO;
4615 case TPACPI_VIDEO_NEW:
4616 return acpi_evalf(NULL, NULL, "\\VEXP", "v")?
4617 0 : -EIO;
4618 default:
4619 return -ENOSYS;
4620 }
4621 /* not reached */
4622 }
4623
4624 static int video_read(struct seq_file *m)
4625 {
4626 int status, autosw;
4627
4628 if (video_supported == TPACPI_VIDEO_NONE) {
4629 seq_printf(m, "status:\t\tnot supported\n");
4630 return 0;
4631 }
4632
4633 /* Even reads can crash X.org, so... */
4634 if (!capable(CAP_SYS_ADMIN))
4635 return -EPERM;
4636
4637 status = video_outputsw_get();
4638 if (status < 0)
4639 return status;
4640
4641 autosw = video_autosw_get();
4642 if (autosw < 0)
4643 return autosw;
4644
4645 seq_printf(m, "status:\t\tsupported\n");
4646 seq_printf(m, "lcd:\t\t%s\n", enabled(status, 0));
4647 seq_printf(m, "crt:\t\t%s\n", enabled(status, 1));
4648 if (video_supported == TPACPI_VIDEO_NEW)
4649 seq_printf(m, "dvi:\t\t%s\n", enabled(status, 3));
4650 seq_printf(m, "auto:\t\t%s\n", enabled(autosw, 0));
4651 seq_printf(m, "commands:\tlcd_enable, lcd_disable\n");
4652 seq_printf(m, "commands:\tcrt_enable, crt_disable\n");
4653 if (video_supported == TPACPI_VIDEO_NEW)
4654 seq_printf(m, "commands:\tdvi_enable, dvi_disable\n");
4655 seq_printf(m, "commands:\tauto_enable, auto_disable\n");
4656 seq_printf(m, "commands:\tvideo_switch, expand_toggle\n");
4657
4658 return 0;
4659 }
4660
4661 static int video_write(char *buf)
4662 {
4663 char *cmd;
4664 int enable, disable, status;
4665 int res;
4666
4667 if (video_supported == TPACPI_VIDEO_NONE)
4668 return -ENODEV;
4669
4670 /* Even reads can crash X.org, let alone writes... */
4671 if (!capable(CAP_SYS_ADMIN))
4672 return -EPERM;
4673
4674 enable = 0;
4675 disable = 0;
4676
4677 while ((cmd = next_cmd(&buf))) {
4678 if (strlencmp(cmd, "lcd_enable") == 0) {
4679 enable |= TP_ACPI_VIDEO_S_LCD;
4680 } else if (strlencmp(cmd, "lcd_disable") == 0) {
4681 disable |= TP_ACPI_VIDEO_S_LCD;
4682 } else if (strlencmp(cmd, "crt_enable") == 0) {
4683 enable |= TP_ACPI_VIDEO_S_CRT;
4684 } else if (strlencmp(cmd, "crt_disable") == 0) {
4685 disable |= TP_ACPI_VIDEO_S_CRT;
4686 } else if (video_supported == TPACPI_VIDEO_NEW &&
4687 strlencmp(cmd, "dvi_enable") == 0) {
4688 enable |= TP_ACPI_VIDEO_S_DVI;
4689 } else if (video_supported == TPACPI_VIDEO_NEW &&
4690 strlencmp(cmd, "dvi_disable") == 0) {
4691 disable |= TP_ACPI_VIDEO_S_DVI;
4692 } else if (strlencmp(cmd, "auto_enable") == 0) {
4693 res = video_autosw_set(1);
4694 if (res)
4695 return res;
4696 } else if (strlencmp(cmd, "auto_disable") == 0) {
4697 res = video_autosw_set(0);
4698 if (res)
4699 return res;
4700 } else if (strlencmp(cmd, "video_switch") == 0) {
4701 res = video_outputsw_cycle();
4702 if (res)
4703 return res;
4704 } else if (strlencmp(cmd, "expand_toggle") == 0) {
4705 res = video_expand_toggle();
4706 if (res)
4707 return res;
4708 } else
4709 return -EINVAL;
4710 }
4711
4712 if (enable || disable) {
4713 status = video_outputsw_get();
4714 if (status < 0)
4715 return status;
4716 res = video_outputsw_set((status & ~disable) | enable);
4717 if (res)
4718 return res;
4719 }
4720
4721 return 0;
4722 }
4723
4724 static struct ibm_struct video_driver_data = {
4725 .name = "video",
4726 .read = video_read,
4727 .write = video_write,
4728 .exit = video_exit,
4729 };
4730
4731 #endif /* CONFIG_THINKPAD_ACPI_VIDEO */
4732
4733 /*************************************************************************
4734 * Light (thinklight) subdriver
4735 */
4736
4737 TPACPI_HANDLE(lght, root, "\\LGHT"); /* A21e, A2xm/p, T20-22, X20-21 */
4738 TPACPI_HANDLE(ledb, ec, "LEDB"); /* G4x */
4739
4740 static int light_get_status(void)
4741 {
4742 int status = 0;
4743
4744 if (tp_features.light_status) {
4745 if (!acpi_evalf(ec_handle, &status, "KBLT", "d"))
4746 return -EIO;
4747 return (!!status);
4748 }
4749
4750 return -ENXIO;
4751 }
4752
4753 static int light_set_status(int status)
4754 {
4755 int rc;
4756
4757 if (tp_features.light) {
4758 if (cmos_handle) {
4759 rc = acpi_evalf(cmos_handle, NULL, NULL, "vd",
4760 (status)?
4761 TP_CMOS_THINKLIGHT_ON :
4762 TP_CMOS_THINKLIGHT_OFF);
4763 } else {
4764 rc = acpi_evalf(lght_handle, NULL, NULL, "vd",
4765 (status)? 1 : 0);
4766 }
4767 return (rc)? 0 : -EIO;
4768 }
4769
4770 return -ENXIO;
4771 }
4772
4773 static void light_set_status_worker(struct work_struct *work)
4774 {
4775 struct tpacpi_led_classdev *data =
4776 container_of(work, struct tpacpi_led_classdev, work);
4777
4778 if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING))
4779 light_set_status((data->new_state != TPACPI_LED_OFF));
4780 }
4781
4782 static void light_sysfs_set(struct led_classdev *led_cdev,
4783 enum led_brightness brightness)
4784 {
4785 struct tpacpi_led_classdev *data =
4786 container_of(led_cdev,
4787 struct tpacpi_led_classdev,
4788 led_classdev);
4789 data->new_state = (brightness != LED_OFF) ?
4790 TPACPI_LED_ON : TPACPI_LED_OFF;
4791 queue_work(tpacpi_wq, &data->work);
4792 }
4793
4794 static enum led_brightness light_sysfs_get(struct led_classdev *led_cdev)
4795 {
4796 return (light_get_status() == 1)? LED_FULL : LED_OFF;
4797 }
4798
4799 static struct tpacpi_led_classdev tpacpi_led_thinklight = {
4800 .led_classdev = {
4801 .name = "tpacpi::thinklight",
4802 .brightness_set = &light_sysfs_set,
4803 .brightness_get = &light_sysfs_get,
4804 }
4805 };
4806
4807 static int __init light_init(struct ibm_init_struct *iibm)
4808 {
4809 int rc;
4810
4811 vdbg_printk(TPACPI_DBG_INIT, "initializing light subdriver\n");
4812
4813 TPACPI_ACPIHANDLE_INIT(ledb);
4814 TPACPI_ACPIHANDLE_INIT(lght);
4815 TPACPI_ACPIHANDLE_INIT(cmos);
4816 INIT_WORK(&tpacpi_led_thinklight.work, light_set_status_worker);
4817
4818 /* light not supported on 570, 600e/x, 770e, 770x, G4x, R30, R31 */
4819 tp_features.light = (cmos_handle || lght_handle) && !ledb_handle;
4820
4821 if (tp_features.light)
4822 /* light status not supported on
4823 570, 600e/x, 770e, 770x, G4x, R30, R31, R32, X20 */
4824 tp_features.light_status =
4825 acpi_evalf(ec_handle, NULL, "KBLT", "qv");
4826
4827 vdbg_printk(TPACPI_DBG_INIT, "light is %s, light status is %s\n",
4828 str_supported(tp_features.light),
4829 str_supported(tp_features.light_status));
4830
4831 if (!tp_features.light)
4832 return 1;
4833
4834 rc = led_classdev_register(&tpacpi_pdev->dev,
4835 &tpacpi_led_thinklight.led_classdev);
4836
4837 if (rc < 0) {
4838 tp_features.light = 0;
4839 tp_features.light_status = 0;
4840 } else {
4841 rc = 0;
4842 }
4843
4844 return rc;
4845 }
4846
4847 static void light_exit(void)
4848 {
4849 led_classdev_unregister(&tpacpi_led_thinklight.led_classdev);
4850 if (work_pending(&tpacpi_led_thinklight.work))
4851 flush_workqueue(tpacpi_wq);
4852 }
4853
4854 static int light_read(struct seq_file *m)
4855 {
4856 int status;
4857
4858 if (!tp_features.light) {
4859 seq_printf(m, "status:\t\tnot supported\n");
4860 } else if (!tp_features.light_status) {
4861 seq_printf(m, "status:\t\tunknown\n");
4862 seq_printf(m, "commands:\ton, off\n");
4863 } else {
4864 status = light_get_status();
4865 if (status < 0)
4866 return status;
4867 seq_printf(m, "status:\t\t%s\n", onoff(status, 0));
4868 seq_printf(m, "commands:\ton, off\n");
4869 }
4870
4871 return 0;
4872 }
4873
4874 static int light_write(char *buf)
4875 {
4876 char *cmd;
4877 int newstatus = 0;
4878
4879 if (!tp_features.light)
4880 return -ENODEV;
4881
4882 while ((cmd = next_cmd(&buf))) {
4883 if (strlencmp(cmd, "on") == 0) {
4884 newstatus = 1;
4885 } else if (strlencmp(cmd, "off") == 0) {
4886 newstatus = 0;
4887 } else
4888 return -EINVAL;
4889 }
4890
4891 return light_set_status(newstatus);
4892 }
4893
4894 static struct ibm_struct light_driver_data = {
4895 .name = "light",
4896 .read = light_read,
4897 .write = light_write,
4898 .exit = light_exit,
4899 };
4900
4901 /*************************************************************************
4902 * CMOS subdriver
4903 */
4904
4905 /* sysfs cmos_command -------------------------------------------------- */
4906 static ssize_t cmos_command_store(struct device *dev,
4907 struct device_attribute *attr,
4908 const char *buf, size_t count)
4909 {
4910 unsigned long cmos_cmd;
4911 int res;
4912
4913 if (parse_strtoul(buf, 21, &cmos_cmd))
4914 return -EINVAL;
4915
4916 res = issue_thinkpad_cmos_command(cmos_cmd);
4917 return (res)? res : count;
4918 }
4919
4920 static struct device_attribute dev_attr_cmos_command =
4921 __ATTR(cmos_command, S_IWUSR, NULL, cmos_command_store);
4922
4923 /* --------------------------------------------------------------------- */
4924
4925 static int __init cmos_init(struct ibm_init_struct *iibm)
4926 {
4927 int res;
4928
4929 vdbg_printk(TPACPI_DBG_INIT,
4930 "initializing cmos commands subdriver\n");
4931
4932 TPACPI_ACPIHANDLE_INIT(cmos);
4933
4934 vdbg_printk(TPACPI_DBG_INIT, "cmos commands are %s\n",
4935 str_supported(cmos_handle != NULL));
4936
4937 res = device_create_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
4938 if (res)
4939 return res;
4940
4941 return (cmos_handle)? 0 : 1;
4942 }
4943
4944 static void cmos_exit(void)
4945 {
4946 device_remove_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
4947 }
4948
4949 static int cmos_read(struct seq_file *m)
4950 {
4951 /* cmos not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
4952 R30, R31, T20-22, X20-21 */
4953 if (!cmos_handle)
4954 seq_printf(m, "status:\t\tnot supported\n");
4955 else {
4956 seq_printf(m, "status:\t\tsupported\n");
4957 seq_printf(m, "commands:\t<cmd> (<cmd> is 0-21)\n");
4958 }
4959
4960 return 0;
4961 }
4962
4963 static int cmos_write(char *buf)
4964 {
4965 char *cmd;
4966 int cmos_cmd, res;
4967
4968 while ((cmd = next_cmd(&buf))) {
4969 if (sscanf(cmd, "%u", &cmos_cmd) == 1 &&
4970 cmos_cmd >= 0 && cmos_cmd <= 21) {
4971 /* cmos_cmd set */
4972 } else
4973 return -EINVAL;
4974
4975 res = issue_thinkpad_cmos_command(cmos_cmd);
4976 if (res)
4977 return res;
4978 }
4979
4980 return 0;
4981 }
4982
4983 static struct ibm_struct cmos_driver_data = {
4984 .name = "cmos",
4985 .read = cmos_read,
4986 .write = cmos_write,
4987 .exit = cmos_exit,
4988 };
4989
4990 /*************************************************************************
4991 * LED subdriver
4992 */
4993
4994 enum led_access_mode {
4995 TPACPI_LED_NONE = 0,
4996 TPACPI_LED_570, /* 570 */
4997 TPACPI_LED_OLD, /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
4998 TPACPI_LED_NEW, /* all others */
4999 };
5000
5001 enum { /* For TPACPI_LED_OLD */
5002 TPACPI_LED_EC_HLCL = 0x0c, /* EC reg to get led to power on */
5003 TPACPI_LED_EC_HLBL = 0x0d, /* EC reg to blink a lit led */
5004 TPACPI_LED_EC_HLMS = 0x0e, /* EC reg to select led to command */
5005 };
5006
5007 static enum led_access_mode led_supported;
5008
5009 TPACPI_HANDLE(led, ec, "SLED", /* 570 */
5010 "SYSL", /* 600e/x, 770e, 770x, A21e, A2xm/p, */
5011 /* T20-22, X20-21 */
5012 "LED", /* all others */
5013 ); /* R30, R31 */
5014
5015 #define TPACPI_LED_NUMLEDS 16
5016 static struct tpacpi_led_classdev *tpacpi_leds;
5017 static enum led_status_t tpacpi_led_state_cache[TPACPI_LED_NUMLEDS];
5018 static const char * const tpacpi_led_names[TPACPI_LED_NUMLEDS] = {
5019 /* there's a limit of 19 chars + NULL before 2.6.26 */
5020 "tpacpi::power",
5021 "tpacpi:orange:batt",
5022 "tpacpi:green:batt",
5023 "tpacpi::dock_active",
5024 "tpacpi::bay_active",
5025 "tpacpi::dock_batt",
5026 "tpacpi::unknown_led",
5027 "tpacpi::standby",
5028 "tpacpi::dock_status1",
5029 "tpacpi::dock_status2",
5030 "tpacpi::unknown_led2",
5031 "tpacpi::unknown_led3",
5032 "tpacpi::thinkvantage",
5033 };
5034 #define TPACPI_SAFE_LEDS 0x1081U
5035
5036 static inline bool tpacpi_is_led_restricted(const unsigned int led)
5037 {
5038 #ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS
5039 return false;
5040 #else
5041 return (1U & (TPACPI_SAFE_LEDS >> led)) == 0;
5042 #endif
5043 }
5044
5045 static int led_get_status(const unsigned int led)
5046 {
5047 int status;
5048 enum led_status_t led_s;
5049
5050 switch (led_supported) {
5051 case TPACPI_LED_570:
5052 if (!acpi_evalf(ec_handle,
5053 &status, "GLED", "dd", 1 << led))
5054 return -EIO;
5055 led_s = (status == 0)?
5056 TPACPI_LED_OFF :
5057 ((status == 1)?
5058 TPACPI_LED_ON :
5059 TPACPI_LED_BLINK);
5060 tpacpi_led_state_cache[led] = led_s;
5061 return led_s;
5062 default:
5063 return -ENXIO;
5064 }
5065
5066 /* not reached */
5067 }
5068
5069 static int led_set_status(const unsigned int led,
5070 const enum led_status_t ledstatus)
5071 {
5072 /* off, on, blink. Index is led_status_t */
5073 static const unsigned int led_sled_arg1[] = { 0, 1, 3 };
5074 static const unsigned int led_led_arg1[] = { 0, 0x80, 0xc0 };
5075
5076 int rc = 0;
5077
5078 switch (led_supported) {
5079 case TPACPI_LED_570:
5080 /* 570 */
5081 if (unlikely(led > 7))
5082 return -EINVAL;
5083 if (unlikely(tpacpi_is_led_restricted(led)))
5084 return -EPERM;
5085 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
5086 (1 << led), led_sled_arg1[ledstatus]))
5087 rc = -EIO;
5088 break;
5089 case TPACPI_LED_OLD:
5090 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */
5091 if (unlikely(led > 7))
5092 return -EINVAL;
5093 if (unlikely(tpacpi_is_led_restricted(led)))
5094 return -EPERM;
5095 rc = ec_write(TPACPI_LED_EC_HLMS, (1 << led));
5096 if (rc >= 0)
5097 rc = ec_write(TPACPI_LED_EC_HLBL,
5098 (ledstatus == TPACPI_LED_BLINK) << led);
5099 if (rc >= 0)
5100 rc = ec_write(TPACPI_LED_EC_HLCL,
5101 (ledstatus != TPACPI_LED_OFF) << led);
5102 break;
5103 case TPACPI_LED_NEW:
5104 /* all others */
5105 if (unlikely(led >= TPACPI_LED_NUMLEDS))
5106 return -EINVAL;
5107 if (unlikely(tpacpi_is_led_restricted(led)))
5108 return -EPERM;
5109 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
5110 led, led_led_arg1[ledstatus]))
5111 rc = -EIO;
5112 break;
5113 default:
5114 rc = -ENXIO;
5115 }
5116
5117 if (!rc)
5118 tpacpi_led_state_cache[led] = ledstatus;
5119
5120 return rc;
5121 }
5122
5123 static void led_set_status_worker(struct work_struct *work)
5124 {
5125 struct tpacpi_led_classdev *data =
5126 container_of(work, struct tpacpi_led_classdev, work);
5127
5128 if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING))
5129 led_set_status(data->led, data->new_state);
5130 }
5131
5132 static void led_sysfs_set(struct led_classdev *led_cdev,
5133 enum led_brightness brightness)
5134 {
5135 struct tpacpi_led_classdev *data = container_of(led_cdev,
5136 struct tpacpi_led_classdev, led_classdev);
5137
5138 if (brightness == LED_OFF)
5139 data->new_state = TPACPI_LED_OFF;
5140 else if (tpacpi_led_state_cache[data->led] != TPACPI_LED_BLINK)
5141 data->new_state = TPACPI_LED_ON;
5142 else
5143 data->new_state = TPACPI_LED_BLINK;
5144
5145 queue_work(tpacpi_wq, &data->work);
5146 }
5147
5148 static int led_sysfs_blink_set(struct led_classdev *led_cdev,
5149 unsigned long *delay_on, unsigned long *delay_off)
5150 {
5151 struct tpacpi_led_classdev *data = container_of(led_cdev,
5152 struct tpacpi_led_classdev, led_classdev);
5153
5154 /* Can we choose the flash rate? */
5155 if (*delay_on == 0 && *delay_off == 0) {
5156 /* yes. set them to the hardware blink rate (1 Hz) */
5157 *delay_on = 500; /* ms */
5158 *delay_off = 500; /* ms */
5159 } else if ((*delay_on != 500) || (*delay_off != 500))
5160 return -EINVAL;
5161
5162 data->new_state = TPACPI_LED_BLINK;
5163 queue_work(tpacpi_wq, &data->work);
5164
5165 return 0;
5166 }
5167
5168 static enum led_brightness led_sysfs_get(struct led_classdev *led_cdev)
5169 {
5170 int rc;
5171
5172 struct tpacpi_led_classdev *data = container_of(led_cdev,
5173 struct tpacpi_led_classdev, led_classdev);
5174
5175 rc = led_get_status(data->led);
5176
5177 if (rc == TPACPI_LED_OFF || rc < 0)
5178 rc = LED_OFF; /* no error handling in led class :( */
5179 else
5180 rc = LED_FULL;
5181
5182 return rc;
5183 }
5184
5185 static void led_exit(void)
5186 {
5187 unsigned int i;
5188
5189 for (i = 0; i < TPACPI_LED_NUMLEDS; i++) {
5190 if (tpacpi_leds[i].led_classdev.name)
5191 led_classdev_unregister(&tpacpi_leds[i].led_classdev);
5192 }
5193
5194 kfree(tpacpi_leds);
5195 }
5196
5197 static int __init tpacpi_init_led(unsigned int led)
5198 {
5199 int rc;
5200
5201 tpacpi_leds[led].led = led;
5202
5203 /* LEDs with no name don't get registered */
5204 if (!tpacpi_led_names[led])
5205 return 0;
5206
5207 tpacpi_leds[led].led_classdev.brightness_set = &led_sysfs_set;
5208 tpacpi_leds[led].led_classdev.blink_set = &led_sysfs_blink_set;
5209 if (led_supported == TPACPI_LED_570)
5210 tpacpi_leds[led].led_classdev.brightness_get =
5211 &led_sysfs_get;
5212
5213 tpacpi_leds[led].led_classdev.name = tpacpi_led_names[led];
5214
5215 INIT_WORK(&tpacpi_leds[led].work, led_set_status_worker);
5216
5217 rc = led_classdev_register(&tpacpi_pdev->dev,
5218 &tpacpi_leds[led].led_classdev);
5219 if (rc < 0)
5220 tpacpi_leds[led].led_classdev.name = NULL;
5221
5222 return rc;
5223 }
5224
5225 static const struct tpacpi_quirk led_useful_qtable[] __initconst = {
5226 TPACPI_Q_IBM('1', 'E', 0x009f), /* A30 */
5227 TPACPI_Q_IBM('1', 'N', 0x009f), /* A31 */
5228 TPACPI_Q_IBM('1', 'G', 0x009f), /* A31 */
5229
5230 TPACPI_Q_IBM('1', 'I', 0x0097), /* T30 */
5231 TPACPI_Q_IBM('1', 'R', 0x0097), /* T40, T41, T42, R50, R51 */
5232 TPACPI_Q_IBM('7', '0', 0x0097), /* T43, R52 */
5233 TPACPI_Q_IBM('1', 'Y', 0x0097), /* T43 */
5234 TPACPI_Q_IBM('1', 'W', 0x0097), /* R50e */
5235 TPACPI_Q_IBM('1', 'V', 0x0097), /* R51 */
5236 TPACPI_Q_IBM('7', '8', 0x0097), /* R51e */
5237 TPACPI_Q_IBM('7', '6', 0x0097), /* R52 */
5238
5239 TPACPI_Q_IBM('1', 'K', 0x00bf), /* X30 */
5240 TPACPI_Q_IBM('1', 'Q', 0x00bf), /* X31, X32 */
5241 TPACPI_Q_IBM('1', 'U', 0x00bf), /* X40 */
5242 TPACPI_Q_IBM('7', '4', 0x00bf), /* X41 */
5243 TPACPI_Q_IBM('7', '5', 0x00bf), /* X41t */
5244
5245 TPACPI_Q_IBM('7', '9', 0x1f97), /* T60 (1) */
5246 TPACPI_Q_IBM('7', '7', 0x1f97), /* Z60* (1) */
5247 TPACPI_Q_IBM('7', 'F', 0x1f97), /* Z61* (1) */
5248 TPACPI_Q_IBM('7', 'B', 0x1fb7), /* X60 (1) */
5249
5250 /* (1) - may have excess leds enabled on MSB */
5251
5252 /* Defaults (order matters, keep last, don't reorder!) */
5253 { /* Lenovo */
5254 .vendor = PCI_VENDOR_ID_LENOVO,
5255 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY,
5256 .quirks = 0x1fffU,
5257 },
5258 { /* IBM ThinkPads with no EC version string */
5259 .vendor = PCI_VENDOR_ID_IBM,
5260 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_UNKNOWN,
5261 .quirks = 0x00ffU,
5262 },
5263 { /* IBM ThinkPads with EC version string */
5264 .vendor = PCI_VENDOR_ID_IBM,
5265 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY,
5266 .quirks = 0x00bfU,
5267 },
5268 };
5269
5270 #undef TPACPI_LEDQ_IBM
5271 #undef TPACPI_LEDQ_LNV
5272
5273 static int __init led_init(struct ibm_init_struct *iibm)
5274 {
5275 unsigned int i;
5276 int rc;
5277 unsigned long useful_leds;
5278
5279 vdbg_printk(TPACPI_DBG_INIT, "initializing LED subdriver\n");
5280
5281 TPACPI_ACPIHANDLE_INIT(led);
5282
5283 if (!led_handle)
5284 /* led not supported on R30, R31 */
5285 led_supported = TPACPI_LED_NONE;
5286 else if (strlencmp(led_path, "SLED") == 0)
5287 /* 570 */
5288 led_supported = TPACPI_LED_570;
5289 else if (strlencmp(led_path, "SYSL") == 0)
5290 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
5291 led_supported = TPACPI_LED_OLD;
5292 else
5293 /* all others */
5294 led_supported = TPACPI_LED_NEW;
5295
5296 vdbg_printk(TPACPI_DBG_INIT, "LED commands are %s, mode %d\n",
5297 str_supported(led_supported), led_supported);
5298
5299 if (led_supported == TPACPI_LED_NONE)
5300 return 1;
5301
5302 tpacpi_leds = kzalloc(sizeof(*tpacpi_leds) * TPACPI_LED_NUMLEDS,
5303 GFP_KERNEL);
5304 if (!tpacpi_leds) {
5305 printk(TPACPI_ERR "Out of memory for LED data\n");
5306 return -ENOMEM;
5307 }
5308
5309 useful_leds = tpacpi_check_quirks(led_useful_qtable,
5310 ARRAY_SIZE(led_useful_qtable));
5311
5312 for (i = 0; i < TPACPI_LED_NUMLEDS; i++) {
5313 if (!tpacpi_is_led_restricted(i) &&
5314 test_bit(i, &useful_leds)) {
5315 rc = tpacpi_init_led(i);
5316 if (rc < 0) {
5317 led_exit();
5318 return rc;
5319 }
5320 }
5321 }
5322
5323 #ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS
5324 printk(TPACPI_NOTICE
5325 "warning: userspace override of important "
5326 "firmware LEDs is enabled\n");
5327 #endif
5328 return 0;
5329 }
5330
5331 #define str_led_status(s) \
5332 ((s) == TPACPI_LED_OFF ? "off" : \
5333 ((s) == TPACPI_LED_ON ? "on" : "blinking"))
5334
5335 static int led_read(struct seq_file *m)
5336 {
5337 if (!led_supported) {
5338 seq_printf(m, "status:\t\tnot supported\n");
5339 return 0;
5340 }
5341 seq_printf(m, "status:\t\tsupported\n");
5342
5343 if (led_supported == TPACPI_LED_570) {
5344 /* 570 */
5345 int i, status;
5346 for (i = 0; i < 8; i++) {
5347 status = led_get_status(i);
5348 if (status < 0)
5349 return -EIO;
5350 seq_printf(m, "%d:\t\t%s\n",
5351 i, str_led_status(status));
5352 }
5353 }
5354
5355 seq_printf(m, "commands:\t"
5356 "<led> on, <led> off, <led> blink (<led> is 0-15)\n");
5357
5358 return 0;
5359 }
5360
5361 static int led_write(char *buf)
5362 {
5363 char *cmd;
5364 int led, rc;
5365 enum led_status_t s;
5366
5367 if (!led_supported)
5368 return -ENODEV;
5369
5370 while ((cmd = next_cmd(&buf))) {
5371 if (sscanf(cmd, "%d", &led) != 1 || led < 0 || led > 15)
5372 return -EINVAL;
5373
5374 if (strstr(cmd, "off")) {
5375 s = TPACPI_LED_OFF;
5376 } else if (strstr(cmd, "on")) {
5377 s = TPACPI_LED_ON;
5378 } else if (strstr(cmd, "blink")) {
5379 s = TPACPI_LED_BLINK;
5380 } else {
5381 return -EINVAL;
5382 }
5383
5384 rc = led_set_status(led, s);
5385 if (rc < 0)
5386 return rc;
5387 }
5388
5389 return 0;
5390 }
5391
5392 static struct ibm_struct led_driver_data = {
5393 .name = "led",
5394 .read = led_read,
5395 .write = led_write,
5396 .exit = led_exit,
5397 };
5398
5399 /*************************************************************************
5400 * Beep subdriver
5401 */
5402
5403 TPACPI_HANDLE(beep, ec, "BEEP"); /* all except R30, R31 */
5404
5405 #define TPACPI_BEEP_Q1 0x0001
5406
5407 static const struct tpacpi_quirk beep_quirk_table[] __initconst = {
5408 TPACPI_Q_IBM('I', 'M', TPACPI_BEEP_Q1), /* 570 */
5409 TPACPI_Q_IBM('I', 'U', TPACPI_BEEP_Q1), /* 570E - unverified */
5410 };
5411
5412 static int __init beep_init(struct ibm_init_struct *iibm)
5413 {
5414 unsigned long quirks;
5415
5416 vdbg_printk(TPACPI_DBG_INIT, "initializing beep subdriver\n");
5417
5418 TPACPI_ACPIHANDLE_INIT(beep);
5419
5420 vdbg_printk(TPACPI_DBG_INIT, "beep is %s\n",
5421 str_supported(beep_handle != NULL));
5422
5423 quirks = tpacpi_check_quirks(beep_quirk_table,
5424 ARRAY_SIZE(beep_quirk_table));
5425
5426 tp_features.beep_needs_two_args = !!(quirks & TPACPI_BEEP_Q1);
5427
5428 return (beep_handle)? 0 : 1;
5429 }
5430
5431 static int beep_read(struct seq_file *m)
5432 {
5433 if (!beep_handle)
5434 seq_printf(m, "status:\t\tnot supported\n");
5435 else {
5436 seq_printf(m, "status:\t\tsupported\n");
5437 seq_printf(m, "commands:\t<cmd> (<cmd> is 0-17)\n");
5438 }
5439
5440 return 0;
5441 }
5442
5443 static int beep_write(char *buf)
5444 {
5445 char *cmd;
5446 int beep_cmd;
5447
5448 if (!beep_handle)
5449 return -ENODEV;
5450
5451 while ((cmd = next_cmd(&buf))) {
5452 if (sscanf(cmd, "%u", &beep_cmd) == 1 &&
5453 beep_cmd >= 0 && beep_cmd <= 17) {
5454 /* beep_cmd set */
5455 } else
5456 return -EINVAL;
5457 if (tp_features.beep_needs_two_args) {
5458 if (!acpi_evalf(beep_handle, NULL, NULL, "vdd",
5459 beep_cmd, 0))
5460 return -EIO;
5461 } else {
5462 if (!acpi_evalf(beep_handle, NULL, NULL, "vd",
5463 beep_cmd))
5464 return -EIO;
5465 }
5466 }
5467
5468 return 0;
5469 }
5470
5471 static struct ibm_struct beep_driver_data = {
5472 .name = "beep",
5473 .read = beep_read,
5474 .write = beep_write,
5475 };
5476
5477 /*************************************************************************
5478 * Thermal subdriver
5479 */
5480
5481 enum thermal_access_mode {
5482 TPACPI_THERMAL_NONE = 0, /* No thermal support */
5483 TPACPI_THERMAL_ACPI_TMP07, /* Use ACPI TMP0-7 */
5484 TPACPI_THERMAL_ACPI_UPDT, /* Use ACPI TMP0-7 with UPDT */
5485 TPACPI_THERMAL_TPEC_8, /* Use ACPI EC regs, 8 sensors */
5486 TPACPI_THERMAL_TPEC_16, /* Use ACPI EC regs, 16 sensors */
5487 };
5488
5489 enum { /* TPACPI_THERMAL_TPEC_* */
5490 TP_EC_THERMAL_TMP0 = 0x78, /* ACPI EC regs TMP 0..7 */
5491 TP_EC_THERMAL_TMP8 = 0xC0, /* ACPI EC regs TMP 8..15 */
5492 TP_EC_THERMAL_TMP_NA = -128, /* ACPI EC sensor not available */
5493
5494 TPACPI_THERMAL_SENSOR_NA = -128000, /* Sensor not available */
5495 };
5496
5497
5498 #define TPACPI_MAX_THERMAL_SENSORS 16 /* Max thermal sensors supported */
5499 struct ibm_thermal_sensors_struct {
5500 s32 temp[TPACPI_MAX_THERMAL_SENSORS];
5501 };
5502
5503 static enum thermal_access_mode thermal_read_mode;
5504
5505 /* idx is zero-based */
5506 static int thermal_get_sensor(int idx, s32 *value)
5507 {
5508 int t;
5509 s8 tmp;
5510 char tmpi[5];
5511
5512 t = TP_EC_THERMAL_TMP0;
5513
5514 switch (thermal_read_mode) {
5515 #if TPACPI_MAX_THERMAL_SENSORS >= 16
5516 case TPACPI_THERMAL_TPEC_16:
5517 if (idx >= 8 && idx <= 15) {
5518 t = TP_EC_THERMAL_TMP8;
5519 idx -= 8;
5520 }
5521 /* fallthrough */
5522 #endif
5523 case TPACPI_THERMAL_TPEC_8:
5524 if (idx <= 7) {
5525 if (!acpi_ec_read(t + idx, &tmp))
5526 return -EIO;
5527 *value = tmp * 1000;
5528 return 0;
5529 }
5530 break;
5531
5532 case TPACPI_THERMAL_ACPI_UPDT:
5533 if (idx <= 7) {
5534 snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
5535 if (!acpi_evalf(ec_handle, NULL, "UPDT", "v"))
5536 return -EIO;
5537 if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
5538 return -EIO;
5539 *value = (t - 2732) * 100;
5540 return 0;
5541 }
5542 break;
5543
5544 case TPACPI_THERMAL_ACPI_TMP07:
5545 if (idx <= 7) {
5546 snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
5547 if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
5548 return -EIO;
5549 if (t > 127 || t < -127)
5550 t = TP_EC_THERMAL_TMP_NA;
5551 *value = t * 1000;
5552 return 0;
5553 }
5554 break;
5555
5556 case TPACPI_THERMAL_NONE:
5557 default:
5558 return -ENOSYS;
5559 }
5560
5561 return -EINVAL;
5562 }
5563
5564 static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s)
5565 {
5566 int res, i;
5567 int n;
5568
5569 n = 8;
5570 i = 0;
5571
5572 if (!s)
5573 return -EINVAL;
5574
5575 if (thermal_read_mode == TPACPI_THERMAL_TPEC_16)
5576 n = 16;
5577
5578 for (i = 0 ; i < n; i++) {
5579 res = thermal_get_sensor(i, &s->temp[i]);
5580 if (res)
5581 return res;
5582 }
5583
5584 return n;
5585 }
5586
5587 static void thermal_dump_all_sensors(void)
5588 {
5589 int n, i;
5590 struct ibm_thermal_sensors_struct t;
5591
5592 n = thermal_get_sensors(&t);
5593 if (n <= 0)
5594 return;
5595
5596 printk(TPACPI_NOTICE
5597 "temperatures (Celsius):");
5598
5599 for (i = 0; i < n; i++) {
5600 if (t.temp[i] != TPACPI_THERMAL_SENSOR_NA)
5601 printk(KERN_CONT " %d", (int)(t.temp[i] / 1000));
5602 else
5603 printk(KERN_CONT " N/A");
5604 }
5605
5606 printk(KERN_CONT "\n");
5607 }
5608
5609 /* sysfs temp##_input -------------------------------------------------- */
5610
5611 static ssize_t thermal_temp_input_show(struct device *dev,
5612 struct device_attribute *attr,
5613 char *buf)
5614 {
5615 struct sensor_device_attribute *sensor_attr =
5616 to_sensor_dev_attr(attr);
5617 int idx = sensor_attr->index;
5618 s32 value;
5619 int res;
5620
5621 res = thermal_get_sensor(idx, &value);
5622 if (res)
5623 return res;
5624 if (value == TPACPI_THERMAL_SENSOR_NA)
5625 return -ENXIO;
5626
5627 return snprintf(buf, PAGE_SIZE, "%d\n", value);
5628 }
5629
5630 #define THERMAL_SENSOR_ATTR_TEMP(_idxA, _idxB) \
5631 SENSOR_ATTR(temp##_idxA##_input, S_IRUGO, \
5632 thermal_temp_input_show, NULL, _idxB)
5633
5634 static struct sensor_device_attribute sensor_dev_attr_thermal_temp_input[] = {
5635 THERMAL_SENSOR_ATTR_TEMP(1, 0),
5636 THERMAL_SENSOR_ATTR_TEMP(2, 1),
5637 THERMAL_SENSOR_ATTR_TEMP(3, 2),
5638 THERMAL_SENSOR_ATTR_TEMP(4, 3),
5639 THERMAL_SENSOR_ATTR_TEMP(5, 4),
5640 THERMAL_SENSOR_ATTR_TEMP(6, 5),
5641 THERMAL_SENSOR_ATTR_TEMP(7, 6),
5642 THERMAL_SENSOR_ATTR_TEMP(8, 7),
5643 THERMAL_SENSOR_ATTR_TEMP(9, 8),
5644 THERMAL_SENSOR_ATTR_TEMP(10, 9),
5645 THERMAL_SENSOR_ATTR_TEMP(11, 10),
5646 THERMAL_SENSOR_ATTR_TEMP(12, 11),
5647 THERMAL_SENSOR_ATTR_TEMP(13, 12),
5648 THERMAL_SENSOR_ATTR_TEMP(14, 13),
5649 THERMAL_SENSOR_ATTR_TEMP(15, 14),
5650 THERMAL_SENSOR_ATTR_TEMP(16, 15),
5651 };
5652
5653 #define THERMAL_ATTRS(X) \
5654 &sensor_dev_attr_thermal_temp_input[X].dev_attr.attr
5655
5656 static struct attribute *thermal_temp_input_attr[] = {
5657 THERMAL_ATTRS(8),
5658 THERMAL_ATTRS(9),
5659 THERMAL_ATTRS(10),
5660 THERMAL_ATTRS(11),
5661 THERMAL_ATTRS(12),
5662 THERMAL_ATTRS(13),
5663 THERMAL_ATTRS(14),
5664 THERMAL_ATTRS(15),
5665 THERMAL_ATTRS(0),
5666 THERMAL_ATTRS(1),
5667 THERMAL_ATTRS(2),
5668 THERMAL_ATTRS(3),
5669 THERMAL_ATTRS(4),
5670 THERMAL_ATTRS(5),
5671 THERMAL_ATTRS(6),
5672 THERMAL_ATTRS(7),
5673 NULL
5674 };
5675
5676 static const struct attribute_group thermal_temp_input16_group = {
5677 .attrs = thermal_temp_input_attr
5678 };
5679
5680 static const struct attribute_group thermal_temp_input8_group = {
5681 .attrs = &thermal_temp_input_attr[8]
5682 };
5683
5684 #undef THERMAL_SENSOR_ATTR_TEMP
5685 #undef THERMAL_ATTRS
5686
5687 /* --------------------------------------------------------------------- */
5688
5689 static int __init thermal_init(struct ibm_init_struct *iibm)
5690 {
5691 u8 t, ta1, ta2;
5692 int i;
5693 int acpi_tmp7;
5694 int res;
5695
5696 vdbg_printk(TPACPI_DBG_INIT, "initializing thermal subdriver\n");
5697
5698 acpi_tmp7 = acpi_evalf(ec_handle, NULL, "TMP7", "qv");
5699
5700 if (thinkpad_id.ec_model) {
5701 /*
5702 * Direct EC access mode: sensors at registers
5703 * 0x78-0x7F, 0xC0-0xC7. Registers return 0x00 for
5704 * non-implemented, thermal sensors return 0x80 when
5705 * not available
5706 */
5707
5708 ta1 = ta2 = 0;
5709 for (i = 0; i < 8; i++) {
5710 if (acpi_ec_read(TP_EC_THERMAL_TMP0 + i, &t)) {
5711 ta1 |= t;
5712 } else {
5713 ta1 = 0;
5714 break;
5715 }
5716 if (acpi_ec_read(TP_EC_THERMAL_TMP8 + i, &t)) {
5717 ta2 |= t;
5718 } else {
5719 ta1 = 0;
5720 break;
5721 }
5722 }
5723 if (ta1 == 0) {
5724 /* This is sheer paranoia, but we handle it anyway */
5725 if (acpi_tmp7) {
5726 printk(TPACPI_ERR
5727 "ThinkPad ACPI EC access misbehaving, "
5728 "falling back to ACPI TMPx access "
5729 "mode\n");
5730 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
5731 } else {
5732 printk(TPACPI_ERR
5733 "ThinkPad ACPI EC access misbehaving, "
5734 "disabling thermal sensors access\n");
5735 thermal_read_mode = TPACPI_THERMAL_NONE;
5736 }
5737 } else {
5738 thermal_read_mode =
5739 (ta2 != 0) ?
5740 TPACPI_THERMAL_TPEC_16 : TPACPI_THERMAL_TPEC_8;
5741 }
5742 } else if (acpi_tmp7) {
5743 if (acpi_evalf(ec_handle, NULL, "UPDT", "qv")) {
5744 /* 600e/x, 770e, 770x */
5745 thermal_read_mode = TPACPI_THERMAL_ACPI_UPDT;
5746 } else {
5747 /* Standard ACPI TMPx access, max 8 sensors */
5748 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
5749 }
5750 } else {
5751 /* temperatures not supported on 570, G4x, R30, R31, R32 */
5752 thermal_read_mode = TPACPI_THERMAL_NONE;
5753 }
5754
5755 vdbg_printk(TPACPI_DBG_INIT, "thermal is %s, mode %d\n",
5756 str_supported(thermal_read_mode != TPACPI_THERMAL_NONE),
5757 thermal_read_mode);
5758
5759 switch (thermal_read_mode) {
5760 case TPACPI_THERMAL_TPEC_16:
5761 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
5762 &thermal_temp_input16_group);
5763 if (res)
5764 return res;
5765 break;
5766 case TPACPI_THERMAL_TPEC_8:
5767 case TPACPI_THERMAL_ACPI_TMP07:
5768 case TPACPI_THERMAL_ACPI_UPDT:
5769 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
5770 &thermal_temp_input8_group);
5771 if (res)
5772 return res;
5773 break;
5774 case TPACPI_THERMAL_NONE:
5775 default:
5776 return 1;
5777 }
5778
5779 return 0;
5780 }
5781
5782 static void thermal_exit(void)
5783 {
5784 switch (thermal_read_mode) {
5785 case TPACPI_THERMAL_TPEC_16:
5786 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
5787 &thermal_temp_input16_group);
5788 break;
5789 case TPACPI_THERMAL_TPEC_8:
5790 case TPACPI_THERMAL_ACPI_TMP07:
5791 case TPACPI_THERMAL_ACPI_UPDT:
5792 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
5793 &thermal_temp_input8_group);
5794 break;
5795 case TPACPI_THERMAL_NONE:
5796 default:
5797 break;
5798 }
5799 }
5800
5801 static int thermal_read(struct seq_file *m)
5802 {
5803 int n, i;
5804 struct ibm_thermal_sensors_struct t;
5805
5806 n = thermal_get_sensors(&t);
5807 if (unlikely(n < 0))
5808 return n;
5809
5810 seq_printf(m, "temperatures:\t");
5811
5812 if (n > 0) {
5813 for (i = 0; i < (n - 1); i++)
5814 seq_printf(m, "%d ", t.temp[i] / 1000);
5815 seq_printf(m, "%d\n", t.temp[i] / 1000);
5816 } else
5817 seq_printf(m, "not supported\n");
5818
5819 return 0;
5820 }
5821
5822 static struct ibm_struct thermal_driver_data = {
5823 .name = "thermal",
5824 .read = thermal_read,
5825 .exit = thermal_exit,
5826 };
5827
5828 /*************************************************************************
5829 * EC Dump subdriver
5830 */
5831
5832 static u8 ecdump_regs[256];
5833
5834 static int ecdump_read(struct seq_file *m)
5835 {
5836 int i, j;
5837 u8 v;
5838
5839 seq_printf(m, "EC "
5840 " +00 +01 +02 +03 +04 +05 +06 +07"
5841 " +08 +09 +0a +0b +0c +0d +0e +0f\n");
5842 for (i = 0; i < 256; i += 16) {
5843 seq_printf(m, "EC 0x%02x:", i);
5844 for (j = 0; j < 16; j++) {
5845 if (!acpi_ec_read(i + j, &v))
5846 break;
5847 if (v != ecdump_regs[i + j])
5848 seq_printf(m, " *%02x", v);
5849 else
5850 seq_printf(m, " %02x", v);
5851 ecdump_regs[i + j] = v;
5852 }
5853 seq_putc(m, '\n');
5854 if (j != 16)
5855 break;
5856 }
5857
5858 /* These are way too dangerous to advertise openly... */
5859 #if 0
5860 seq_printf(m, "commands:\t0x<offset> 0x<value>"
5861 " (<offset> is 00-ff, <value> is 00-ff)\n");
5862 seq_printf(m, "commands:\t0x<offset> <value> "
5863 " (<offset> is 00-ff, <value> is 0-255)\n");
5864 #endif
5865 return 0;
5866 }
5867
5868 static int ecdump_write(char *buf)
5869 {
5870 char *cmd;
5871 int i, v;
5872
5873 while ((cmd = next_cmd(&buf))) {
5874 if (sscanf(cmd, "0x%x 0x%x", &i, &v) == 2) {
5875 /* i and v set */
5876 } else if (sscanf(cmd, "0x%x %u", &i, &v) == 2) {
5877 /* i and v set */
5878 } else
5879 return -EINVAL;
5880 if (i >= 0 && i < 256 && v >= 0 && v < 256) {
5881 if (!acpi_ec_write(i, v))
5882 return -EIO;
5883 } else
5884 return -EINVAL;
5885 }
5886
5887 return 0;
5888 }
5889
5890 static struct ibm_struct ecdump_driver_data = {
5891 .name = "ecdump",
5892 .read = ecdump_read,
5893 .write = ecdump_write,
5894 .flags.experimental = 1,
5895 };
5896
5897 /*************************************************************************
5898 * Backlight/brightness subdriver
5899 */
5900
5901 #define TPACPI_BACKLIGHT_DEV_NAME "thinkpad_screen"
5902
5903 /*
5904 * ThinkPads can read brightness from two places: EC HBRV (0x31), or
5905 * CMOS NVRAM byte 0x5E, bits 0-3.
5906 *
5907 * EC HBRV (0x31) has the following layout
5908 * Bit 7: unknown function
5909 * Bit 6: unknown function
5910 * Bit 5: Z: honour scale changes, NZ: ignore scale changes
5911 * Bit 4: must be set to zero to avoid problems
5912 * Bit 3-0: backlight brightness level
5913 *
5914 * brightness_get_raw returns status data in the HBRV layout
5915 *
5916 * WARNING: The X61 has been verified to use HBRV for something else, so
5917 * this should be used _only_ on IBM ThinkPads, and maybe with some careful
5918 * testing on the very early *60 Lenovo models...
5919 */
5920
5921 enum {
5922 TP_EC_BACKLIGHT = 0x31,
5923
5924 /* TP_EC_BACKLIGHT bitmasks */
5925 TP_EC_BACKLIGHT_LVLMSK = 0x1F,
5926 TP_EC_BACKLIGHT_CMDMSK = 0xE0,
5927 TP_EC_BACKLIGHT_MAPSW = 0x20,
5928 };
5929
5930 enum tpacpi_brightness_access_mode {
5931 TPACPI_BRGHT_MODE_AUTO = 0, /* Not implemented yet */
5932 TPACPI_BRGHT_MODE_EC, /* EC control */
5933 TPACPI_BRGHT_MODE_UCMS_STEP, /* UCMS step-based control */
5934 TPACPI_BRGHT_MODE_ECNVRAM, /* EC control w/ NVRAM store */
5935 TPACPI_BRGHT_MODE_MAX
5936 };
5937
5938 static struct backlight_device *ibm_backlight_device;
5939
5940 static enum tpacpi_brightness_access_mode brightness_mode =
5941 TPACPI_BRGHT_MODE_MAX;
5942
5943 static unsigned int brightness_enable = 2; /* 2 = auto, 0 = no, 1 = yes */
5944
5945 static struct mutex brightness_mutex;
5946
5947 /* NVRAM brightness access,
5948 * call with brightness_mutex held! */
5949 static unsigned int tpacpi_brightness_nvram_get(void)
5950 {
5951 u8 lnvram;
5952
5953 lnvram = (nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS)
5954 & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
5955 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
5956 lnvram &= (tp_features.bright_16levels) ? 0x0f : 0x07;
5957
5958 return lnvram;
5959 }
5960
5961 static void tpacpi_brightness_checkpoint_nvram(void)
5962 {
5963 u8 lec = 0;
5964 u8 b_nvram;
5965
5966 if (brightness_mode != TPACPI_BRGHT_MODE_ECNVRAM)
5967 return;
5968
5969 vdbg_printk(TPACPI_DBG_BRGHT,
5970 "trying to checkpoint backlight level to NVRAM...\n");
5971
5972 if (mutex_lock_killable(&brightness_mutex) < 0)
5973 return;
5974
5975 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
5976 goto unlock;
5977 lec &= TP_EC_BACKLIGHT_LVLMSK;
5978 b_nvram = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS);
5979
5980 if (lec != ((b_nvram & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
5981 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS)) {
5982 /* NVRAM needs update */
5983 b_nvram &= ~(TP_NVRAM_MASK_LEVEL_BRIGHTNESS <<
5984 TP_NVRAM_POS_LEVEL_BRIGHTNESS);
5985 b_nvram |= lec;
5986 nvram_write_byte(b_nvram, TP_NVRAM_ADDR_BRIGHTNESS);
5987 dbg_printk(TPACPI_DBG_BRGHT,
5988 "updated NVRAM backlight level to %u (0x%02x)\n",
5989 (unsigned int) lec, (unsigned int) b_nvram);
5990 } else
5991 vdbg_printk(TPACPI_DBG_BRGHT,
5992 "NVRAM backlight level already is %u (0x%02x)\n",
5993 (unsigned int) lec, (unsigned int) b_nvram);
5994
5995 unlock:
5996 mutex_unlock(&brightness_mutex);
5997 }
5998
5999
6000 /* call with brightness_mutex held! */
6001 static int tpacpi_brightness_get_raw(int *status)
6002 {
6003 u8 lec = 0;
6004
6005 switch (brightness_mode) {
6006 case TPACPI_BRGHT_MODE_UCMS_STEP:
6007 *status = tpacpi_brightness_nvram_get();
6008 return 0;
6009 case TPACPI_BRGHT_MODE_EC:
6010 case TPACPI_BRGHT_MODE_ECNVRAM:
6011 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
6012 return -EIO;
6013 *status = lec;
6014 return 0;
6015 default:
6016 return -ENXIO;
6017 }
6018 }
6019
6020 /* call with brightness_mutex held! */
6021 /* do NOT call with illegal backlight level value */
6022 static int tpacpi_brightness_set_ec(unsigned int value)
6023 {
6024 u8 lec = 0;
6025
6026 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
6027 return -EIO;
6028
6029 if (unlikely(!acpi_ec_write(TP_EC_BACKLIGHT,
6030 (lec & TP_EC_BACKLIGHT_CMDMSK) |
6031 (value & TP_EC_BACKLIGHT_LVLMSK))))
6032 return -EIO;
6033
6034 return 0;
6035 }
6036
6037 /* call with brightness_mutex held! */
6038 static int tpacpi_brightness_set_ucmsstep(unsigned int value)
6039 {
6040 int cmos_cmd, inc;
6041 unsigned int current_value, i;
6042
6043 current_value = tpacpi_brightness_nvram_get();
6044
6045 if (value == current_value)
6046 return 0;
6047
6048 cmos_cmd = (value > current_value) ?
6049 TP_CMOS_BRIGHTNESS_UP :
6050 TP_CMOS_BRIGHTNESS_DOWN;
6051 inc = (value > current_value) ? 1 : -1;
6052
6053 for (i = current_value; i != value; i += inc)
6054 if (issue_thinkpad_cmos_command(cmos_cmd))
6055 return -EIO;
6056
6057 return 0;
6058 }
6059
6060 /* May return EINTR which can always be mapped to ERESTARTSYS */
6061 static int brightness_set(unsigned int value)
6062 {
6063 int res;
6064
6065 if (value > ((tp_features.bright_16levels)? 15 : 7) ||
6066 value < 0)
6067 return -EINVAL;
6068
6069 vdbg_printk(TPACPI_DBG_BRGHT,
6070 "set backlight level to %d\n", value);
6071
6072 res = mutex_lock_killable(&brightness_mutex);
6073 if (res < 0)
6074 return res;
6075
6076 switch (brightness_mode) {
6077 case TPACPI_BRGHT_MODE_EC:
6078 case TPACPI_BRGHT_MODE_ECNVRAM:
6079 res = tpacpi_brightness_set_ec(value);
6080 break;
6081 case TPACPI_BRGHT_MODE_UCMS_STEP:
6082 res = tpacpi_brightness_set_ucmsstep(value);
6083 break;
6084 default:
6085 res = -ENXIO;
6086 }
6087
6088 mutex_unlock(&brightness_mutex);
6089 return res;
6090 }
6091
6092 /* sysfs backlight class ----------------------------------------------- */
6093
6094 static int brightness_update_status(struct backlight_device *bd)
6095 {
6096 unsigned int level =
6097 (bd->props.fb_blank == FB_BLANK_UNBLANK &&
6098 bd->props.power == FB_BLANK_UNBLANK) ?
6099 bd->props.brightness : 0;
6100
6101 dbg_printk(TPACPI_DBG_BRGHT,
6102 "backlight: attempt to set level to %d\n",
6103 level);
6104
6105 /* it is the backlight class's job (caller) to handle
6106 * EINTR and other errors properly */
6107 return brightness_set(level);
6108 }
6109
6110 static int brightness_get(struct backlight_device *bd)
6111 {
6112 int status, res;
6113
6114 res = mutex_lock_killable(&brightness_mutex);
6115 if (res < 0)
6116 return 0;
6117
6118 res = tpacpi_brightness_get_raw(&status);
6119
6120 mutex_unlock(&brightness_mutex);
6121
6122 if (res < 0)
6123 return 0;
6124
6125 return status & TP_EC_BACKLIGHT_LVLMSK;
6126 }
6127
6128 static void tpacpi_brightness_notify_change(void)
6129 {
6130 backlight_force_update(ibm_backlight_device,
6131 BACKLIGHT_UPDATE_HOTKEY);
6132 }
6133
6134 static struct backlight_ops ibm_backlight_data = {
6135 .get_brightness = brightness_get,
6136 .update_status = brightness_update_status,
6137 };
6138
6139 /* --------------------------------------------------------------------- */
6140
6141 /*
6142 * These are only useful for models that have only one possibility
6143 * of GPU. If the BIOS model handles both ATI and Intel, don't use
6144 * these quirks.
6145 */
6146 #define TPACPI_BRGHT_Q_NOEC 0x0001 /* Must NOT use EC HBRV */
6147 #define TPACPI_BRGHT_Q_EC 0x0002 /* Should or must use EC HBRV */
6148 #define TPACPI_BRGHT_Q_ASK 0x8000 /* Ask for user report */
6149
6150 static const struct tpacpi_quirk brightness_quirk_table[] __initconst = {
6151 /* Models with ATI GPUs known to require ECNVRAM mode */
6152 TPACPI_Q_IBM('1', 'Y', TPACPI_BRGHT_Q_EC), /* T43/p ATI */
6153
6154 /* Models with ATI GPUs that can use ECNVRAM */
6155 TPACPI_Q_IBM('1', 'R', TPACPI_BRGHT_Q_EC), /* R50,51 T40-42 */
6156 TPACPI_Q_IBM('1', 'Q', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
6157 TPACPI_Q_IBM('7', '6', TPACPI_BRGHT_Q_EC), /* R52 */
6158 TPACPI_Q_IBM('7', '8', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
6159
6160 /* Models with Intel Extreme Graphics 2 */
6161 TPACPI_Q_IBM('1', 'U', TPACPI_BRGHT_Q_NOEC), /* X40 */
6162 TPACPI_Q_IBM('1', 'V', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
6163 TPACPI_Q_IBM('1', 'W', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
6164
6165 /* Models with Intel GMA900 */
6166 TPACPI_Q_IBM('7', '0', TPACPI_BRGHT_Q_NOEC), /* T43, R52 */
6167 TPACPI_Q_IBM('7', '4', TPACPI_BRGHT_Q_NOEC), /* X41 */
6168 TPACPI_Q_IBM('7', '5', TPACPI_BRGHT_Q_NOEC), /* X41 Tablet */
6169 };
6170
6171 static int __init brightness_init(struct ibm_init_struct *iibm)
6172 {
6173 int b;
6174 unsigned long quirks;
6175
6176 vdbg_printk(TPACPI_DBG_INIT, "initializing brightness subdriver\n");
6177
6178 mutex_init(&brightness_mutex);
6179
6180 quirks = tpacpi_check_quirks(brightness_quirk_table,
6181 ARRAY_SIZE(brightness_quirk_table));
6182
6183 /*
6184 * We always attempt to detect acpi support, so as to switch
6185 * Lenovo Vista BIOS to ACPI brightness mode even if we are not
6186 * going to publish a backlight interface
6187 */
6188 b = tpacpi_check_std_acpi_brightness_support();
6189 if (b > 0) {
6190
6191 if (acpi_video_backlight_support()) {
6192 if (brightness_enable > 1) {
6193 printk(TPACPI_NOTICE
6194 "Standard ACPI backlight interface "
6195 "available, not loading native one.\n");
6196 return 1;
6197 } else if (brightness_enable == 1) {
6198 printk(TPACPI_NOTICE
6199 "Backlight control force enabled, even if standard "
6200 "ACPI backlight interface is available\n");
6201 }
6202 } else {
6203 if (brightness_enable > 1) {
6204 printk(TPACPI_NOTICE
6205 "Standard ACPI backlight interface not "
6206 "available, thinkpad_acpi native "
6207 "brightness control enabled\n");
6208 }
6209 }
6210 }
6211
6212 if (!brightness_enable) {
6213 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT,
6214 "brightness support disabled by "
6215 "module parameter\n");
6216 return 1;
6217 }
6218
6219 if (b > 16) {
6220 printk(TPACPI_ERR
6221 "Unsupported brightness interface, "
6222 "please contact %s\n", TPACPI_MAIL);
6223 return 1;
6224 }
6225 if (b == 16)
6226 tp_features.bright_16levels = 1;
6227
6228 /*
6229 * Check for module parameter bogosity, note that we
6230 * init brightness_mode to TPACPI_BRGHT_MODE_MAX in order to be
6231 * able to detect "unspecified"
6232 */
6233 if (brightness_mode > TPACPI_BRGHT_MODE_MAX)
6234 return -EINVAL;
6235
6236 /* TPACPI_BRGHT_MODE_AUTO not implemented yet, just use default */
6237 if (brightness_mode == TPACPI_BRGHT_MODE_AUTO ||
6238 brightness_mode == TPACPI_BRGHT_MODE_MAX) {
6239 if (quirks & TPACPI_BRGHT_Q_EC)
6240 brightness_mode = TPACPI_BRGHT_MODE_ECNVRAM;
6241 else
6242 brightness_mode = TPACPI_BRGHT_MODE_UCMS_STEP;
6243
6244 dbg_printk(TPACPI_DBG_BRGHT,
6245 "driver auto-selected brightness_mode=%d\n",
6246 brightness_mode);
6247 }
6248
6249 /* Safety */
6250 if (thinkpad_id.vendor != PCI_VENDOR_ID_IBM &&
6251 (brightness_mode == TPACPI_BRGHT_MODE_ECNVRAM ||
6252 brightness_mode == TPACPI_BRGHT_MODE_EC))
6253 return -EINVAL;
6254
6255 if (tpacpi_brightness_get_raw(&b) < 0)
6256 return 1;
6257
6258 if (tp_features.bright_16levels)
6259 printk(TPACPI_INFO
6260 "detected a 16-level brightness capable ThinkPad\n");
6261
6262 ibm_backlight_device = backlight_device_register(
6263 TPACPI_BACKLIGHT_DEV_NAME, NULL, NULL,
6264 &ibm_backlight_data);
6265 if (IS_ERR(ibm_backlight_device)) {
6266 int rc = PTR_ERR(ibm_backlight_device);
6267 ibm_backlight_device = NULL;
6268 printk(TPACPI_ERR "Could not register backlight device\n");
6269 return rc;
6270 }
6271 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT,
6272 "brightness is supported\n");
6273
6274 if (quirks & TPACPI_BRGHT_Q_ASK) {
6275 printk(TPACPI_NOTICE
6276 "brightness: will use unverified default: "
6277 "brightness_mode=%d\n", brightness_mode);
6278 printk(TPACPI_NOTICE
6279 "brightness: please report to %s whether it works well "
6280 "or not on your ThinkPad\n", TPACPI_MAIL);
6281 }
6282
6283 ibm_backlight_device->props.max_brightness =
6284 (tp_features.bright_16levels)? 15 : 7;
6285 ibm_backlight_device->props.brightness = b & TP_EC_BACKLIGHT_LVLMSK;
6286 backlight_update_status(ibm_backlight_device);
6287
6288 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT,
6289 "brightness: registering brightness hotkeys "
6290 "as change notification\n");
6291 tpacpi_hotkey_driver_mask_set(hotkey_driver_mask
6292 | TP_ACPI_HKEY_BRGHTUP_MASK
6293 | TP_ACPI_HKEY_BRGHTDWN_MASK);;
6294 return 0;
6295 }
6296
6297 static void brightness_suspend(pm_message_t state)
6298 {
6299 tpacpi_brightness_checkpoint_nvram();
6300 }
6301
6302 static void brightness_shutdown(void)
6303 {
6304 tpacpi_brightness_checkpoint_nvram();
6305 }
6306
6307 static void brightness_exit(void)
6308 {
6309 if (ibm_backlight_device) {
6310 vdbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_BRGHT,
6311 "calling backlight_device_unregister()\n");
6312 backlight_device_unregister(ibm_backlight_device);
6313 }
6314
6315 tpacpi_brightness_checkpoint_nvram();
6316 }
6317
6318 static int brightness_read(struct seq_file *m)
6319 {
6320 int level;
6321
6322 level = brightness_get(NULL);
6323 if (level < 0) {
6324 seq_printf(m, "level:\t\tunreadable\n");
6325 } else {
6326 seq_printf(m, "level:\t\t%d\n", level);
6327 seq_printf(m, "commands:\tup, down\n");
6328 seq_printf(m, "commands:\tlevel <level>"
6329 " (<level> is 0-%d)\n",
6330 (tp_features.bright_16levels) ? 15 : 7);
6331 }
6332
6333 return 0;
6334 }
6335
6336 static int brightness_write(char *buf)
6337 {
6338 int level;
6339 int rc;
6340 char *cmd;
6341 int max_level = (tp_features.bright_16levels) ? 15 : 7;
6342
6343 level = brightness_get(NULL);
6344 if (level < 0)
6345 return level;
6346
6347 while ((cmd = next_cmd(&buf))) {
6348 if (strlencmp(cmd, "up") == 0) {
6349 if (level < max_level)
6350 level++;
6351 } else if (strlencmp(cmd, "down") == 0) {
6352 if (level > 0)
6353 level--;
6354 } else if (sscanf(cmd, "level %d", &level) == 1 &&
6355 level >= 0 && level <= max_level) {
6356 /* new level set */
6357 } else
6358 return -EINVAL;
6359 }
6360
6361 tpacpi_disclose_usertask("procfs brightness",
6362 "set level to %d\n", level);
6363
6364 /*
6365 * Now we know what the final level should be, so we try to set it.
6366 * Doing it this way makes the syscall restartable in case of EINTR
6367 */
6368 rc = brightness_set(level);
6369 if (!rc && ibm_backlight_device)
6370 backlight_force_update(ibm_backlight_device,
6371 BACKLIGHT_UPDATE_SYSFS);
6372 return (rc == -EINTR)? -ERESTARTSYS : rc;
6373 }
6374
6375 static struct ibm_struct brightness_driver_data = {
6376 .name = "brightness",
6377 .read = brightness_read,
6378 .write = brightness_write,
6379 .exit = brightness_exit,
6380 .suspend = brightness_suspend,
6381 .shutdown = brightness_shutdown,
6382 };
6383
6384 /*************************************************************************
6385 * Volume subdriver
6386 */
6387
6388 /*
6389 * IBM ThinkPads have a simple volume controller with MUTE gating.
6390 * Very early Lenovo ThinkPads follow the IBM ThinkPad spec.
6391 *
6392 * Since the *61 series (and probably also the later *60 series), Lenovo
6393 * ThinkPads only implement the MUTE gate.
6394 *
6395 * EC register 0x30
6396 * Bit 6: MUTE (1 mutes sound)
6397 * Bit 3-0: Volume
6398 * Other bits should be zero as far as we know.
6399 *
6400 * This is also stored in CMOS NVRAM, byte 0x60, bit 6 (MUTE), and
6401 * bits 3-0 (volume). Other bits in NVRAM may have other functions,
6402 * such as bit 7 which is used to detect repeated presses of MUTE,
6403 * and we leave them unchanged.
6404 */
6405
6406 #ifdef CONFIG_THINKPAD_ACPI_ALSA_SUPPORT
6407
6408 #define TPACPI_ALSA_DRVNAME "ThinkPad EC"
6409 #define TPACPI_ALSA_SHRTNAME "ThinkPad Console Audio Control"
6410 #define TPACPI_ALSA_MIXERNAME TPACPI_ALSA_SHRTNAME
6411
6412 static int alsa_index = ~((1 << (SNDRV_CARDS - 3)) - 1); /* last three slots */
6413 static char *alsa_id = "ThinkPadEC";
6414 static int alsa_enable = SNDRV_DEFAULT_ENABLE1;
6415
6416 struct tpacpi_alsa_data {
6417 struct snd_card *card;
6418 struct snd_ctl_elem_id *ctl_mute_id;
6419 struct snd_ctl_elem_id *ctl_vol_id;
6420 };
6421
6422 static struct snd_card *alsa_card;
6423
6424 enum {
6425 TP_EC_AUDIO = 0x30,
6426
6427 /* TP_EC_AUDIO bits */
6428 TP_EC_AUDIO_MUTESW = 6,
6429
6430 /* TP_EC_AUDIO bitmasks */
6431 TP_EC_AUDIO_LVL_MSK = 0x0F,
6432 TP_EC_AUDIO_MUTESW_MSK = (1 << TP_EC_AUDIO_MUTESW),
6433
6434 /* Maximum volume */
6435 TP_EC_VOLUME_MAX = 14,
6436 };
6437
6438 enum tpacpi_volume_access_mode {
6439 TPACPI_VOL_MODE_AUTO = 0, /* Not implemented yet */
6440 TPACPI_VOL_MODE_EC, /* Pure EC control */
6441 TPACPI_VOL_MODE_UCMS_STEP, /* UCMS step-based control: N/A */
6442 TPACPI_VOL_MODE_ECNVRAM, /* EC control w/ NVRAM store */
6443 TPACPI_VOL_MODE_MAX
6444 };
6445
6446 enum tpacpi_volume_capabilities {
6447 TPACPI_VOL_CAP_AUTO = 0, /* Use white/blacklist */
6448 TPACPI_VOL_CAP_VOLMUTE, /* Output vol and mute */
6449 TPACPI_VOL_CAP_MUTEONLY, /* Output mute only */
6450 TPACPI_VOL_CAP_MAX
6451 };
6452
6453 static enum tpacpi_volume_access_mode volume_mode =
6454 TPACPI_VOL_MODE_MAX;
6455
6456 static enum tpacpi_volume_capabilities volume_capabilities;
6457 static int volume_control_allowed;
6458
6459 /*
6460 * Used to syncronize writers to TP_EC_AUDIO and
6461 * TP_NVRAM_ADDR_MIXER, as we need to do read-modify-write
6462 */
6463 static struct mutex volume_mutex;
6464
6465 static void tpacpi_volume_checkpoint_nvram(void)
6466 {
6467 u8 lec = 0;
6468 u8 b_nvram;
6469 u8 ec_mask;
6470
6471 if (volume_mode != TPACPI_VOL_MODE_ECNVRAM)
6472 return;
6473 if (!volume_control_allowed)
6474 return;
6475
6476 vdbg_printk(TPACPI_DBG_MIXER,
6477 "trying to checkpoint mixer state to NVRAM...\n");
6478
6479 if (tp_features.mixer_no_level_control)
6480 ec_mask = TP_EC_AUDIO_MUTESW_MSK;
6481 else
6482 ec_mask = TP_EC_AUDIO_MUTESW_MSK | TP_EC_AUDIO_LVL_MSK;
6483
6484 if (mutex_lock_killable(&volume_mutex) < 0)
6485 return;
6486
6487 if (unlikely(!acpi_ec_read(TP_EC_AUDIO, &lec)))
6488 goto unlock;
6489 lec &= ec_mask;
6490 b_nvram = nvram_read_byte(TP_NVRAM_ADDR_MIXER);
6491
6492 if (lec != (b_nvram & ec_mask)) {
6493 /* NVRAM needs update */
6494 b_nvram &= ~ec_mask;
6495 b_nvram |= lec;
6496 nvram_write_byte(b_nvram, TP_NVRAM_ADDR_MIXER);
6497 dbg_printk(TPACPI_DBG_MIXER,
6498 "updated NVRAM mixer status to 0x%02x (0x%02x)\n",
6499 (unsigned int) lec, (unsigned int) b_nvram);
6500 } else {
6501 vdbg_printk(TPACPI_DBG_MIXER,
6502 "NVRAM mixer status already is 0x%02x (0x%02x)\n",
6503 (unsigned int) lec, (unsigned int) b_nvram);
6504 }
6505
6506 unlock:
6507 mutex_unlock(&volume_mutex);
6508 }
6509
6510 static int volume_get_status_ec(u8 *status)
6511 {
6512 u8 s;
6513
6514 if (!acpi_ec_read(TP_EC_AUDIO, &s))
6515 return -EIO;
6516
6517 *status = s;
6518
6519 dbg_printk(TPACPI_DBG_MIXER, "status 0x%02x\n", s);
6520
6521 return 0;
6522 }
6523
6524 static int volume_get_status(u8 *status)
6525 {
6526 return volume_get_status_ec(status);
6527 }
6528
6529 static int volume_set_status_ec(const u8 status)
6530 {
6531 if (!acpi_ec_write(TP_EC_AUDIO, status))
6532 return -EIO;
6533
6534 dbg_printk(TPACPI_DBG_MIXER, "set EC mixer to 0x%02x\n", status);
6535
6536 return 0;
6537 }
6538
6539 static int volume_set_status(const u8 status)
6540 {
6541 return volume_set_status_ec(status);
6542 }
6543
6544 /* returns < 0 on error, 0 on no change, 1 on change */
6545 static int __volume_set_mute_ec(const bool mute)
6546 {
6547 int rc;
6548 u8 s, n;
6549
6550 if (mutex_lock_killable(&volume_mutex) < 0)
6551 return -EINTR;
6552
6553 rc = volume_get_status_ec(&s);
6554 if (rc)
6555 goto unlock;
6556
6557 n = (mute) ? s | TP_EC_AUDIO_MUTESW_MSK :
6558 s & ~TP_EC_AUDIO_MUTESW_MSK;
6559
6560 if (n != s) {
6561 rc = volume_set_status_ec(n);
6562 if (!rc)
6563 rc = 1;
6564 }
6565
6566 unlock:
6567 mutex_unlock(&volume_mutex);
6568 return rc;
6569 }
6570
6571 static int volume_alsa_set_mute(const bool mute)
6572 {
6573 dbg_printk(TPACPI_DBG_MIXER, "ALSA: trying to %smute\n",
6574 (mute) ? "" : "un");
6575 return __volume_set_mute_ec(mute);
6576 }
6577
6578 static int volume_set_mute(const bool mute)
6579 {
6580 int rc;
6581
6582 dbg_printk(TPACPI_DBG_MIXER, "trying to %smute\n",
6583 (mute) ? "" : "un");
6584
6585 rc = __volume_set_mute_ec(mute);
6586 return (rc < 0) ? rc : 0;
6587 }
6588
6589 /* returns < 0 on error, 0 on no change, 1 on change */
6590 static int __volume_set_volume_ec(const u8 vol)
6591 {
6592 int rc;
6593 u8 s, n;
6594
6595 if (vol > TP_EC_VOLUME_MAX)
6596 return -EINVAL;
6597
6598 if (mutex_lock_killable(&volume_mutex) < 0)
6599 return -EINTR;
6600
6601 rc = volume_get_status_ec(&s);
6602 if (rc)
6603 goto unlock;
6604
6605 n = (s & ~TP_EC_AUDIO_LVL_MSK) | vol;
6606
6607 if (n != s) {
6608 rc = volume_set_status_ec(n);
6609 if (!rc)
6610 rc = 1;
6611 }
6612
6613 unlock:
6614 mutex_unlock(&volume_mutex);
6615 return rc;
6616 }
6617
6618 static int volume_alsa_set_volume(const u8 vol)
6619 {
6620 dbg_printk(TPACPI_DBG_MIXER,
6621 "ALSA: trying to set volume level to %hu\n", vol);
6622 return __volume_set_volume_ec(vol);
6623 }
6624
6625 static void volume_alsa_notify_change(void)
6626 {
6627 struct tpacpi_alsa_data *d;
6628
6629 if (alsa_card && alsa_card->private_data) {
6630 d = alsa_card->private_data;
6631 if (d->ctl_mute_id)
6632 snd_ctl_notify(alsa_card,
6633 SNDRV_CTL_EVENT_MASK_VALUE,
6634 d->ctl_mute_id);
6635 if (d->ctl_vol_id)
6636 snd_ctl_notify(alsa_card,
6637 SNDRV_CTL_EVENT_MASK_VALUE,
6638 d->ctl_vol_id);
6639 }
6640 }
6641
6642 static int volume_alsa_vol_info(struct snd_kcontrol *kcontrol,
6643 struct snd_ctl_elem_info *uinfo)
6644 {
6645 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
6646 uinfo->count = 1;
6647 uinfo->value.integer.min = 0;
6648 uinfo->value.integer.max = TP_EC_VOLUME_MAX;
6649 return 0;
6650 }
6651
6652 static int volume_alsa_vol_get(struct snd_kcontrol *kcontrol,
6653 struct snd_ctl_elem_value *ucontrol)
6654 {
6655 u8 s;
6656 int rc;
6657
6658 rc = volume_get_status(&s);
6659 if (rc < 0)
6660 return rc;
6661
6662 ucontrol->value.integer.value[0] = s & TP_EC_AUDIO_LVL_MSK;
6663 return 0;
6664 }
6665
6666 static int volume_alsa_vol_put(struct snd_kcontrol *kcontrol,
6667 struct snd_ctl_elem_value *ucontrol)
6668 {
6669 return volume_alsa_set_volume(ucontrol->value.integer.value[0]);
6670 }
6671
6672 #define volume_alsa_mute_info snd_ctl_boolean_mono_info
6673
6674 static int volume_alsa_mute_get(struct snd_kcontrol *kcontrol,
6675 struct snd_ctl_elem_value *ucontrol)
6676 {
6677 u8 s;
6678 int rc;
6679
6680 rc = volume_get_status(&s);
6681 if (rc < 0)
6682 return rc;
6683
6684 ucontrol->value.integer.value[0] =
6685 (s & TP_EC_AUDIO_MUTESW_MSK) ? 0 : 1;
6686 return 0;
6687 }
6688
6689 static int volume_alsa_mute_put(struct snd_kcontrol *kcontrol,
6690 struct snd_ctl_elem_value *ucontrol)
6691 {
6692 return volume_alsa_set_mute(!ucontrol->value.integer.value[0]);
6693 }
6694
6695 static struct snd_kcontrol_new volume_alsa_control_vol __devinitdata = {
6696 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
6697 .name = "Console Playback Volume",
6698 .index = 0,
6699 .access = SNDRV_CTL_ELEM_ACCESS_READ,
6700 .info = volume_alsa_vol_info,
6701 .get = volume_alsa_vol_get,
6702 };
6703
6704 static struct snd_kcontrol_new volume_alsa_control_mute __devinitdata = {
6705 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
6706 .name = "Console Playback Switch",
6707 .index = 0,
6708 .access = SNDRV_CTL_ELEM_ACCESS_READ,
6709 .info = volume_alsa_mute_info,
6710 .get = volume_alsa_mute_get,
6711 };
6712
6713 static void volume_suspend(pm_message_t state)
6714 {
6715 tpacpi_volume_checkpoint_nvram();
6716 }
6717
6718 static void volume_resume(void)
6719 {
6720 volume_alsa_notify_change();
6721 }
6722
6723 static void volume_shutdown(void)
6724 {
6725 tpacpi_volume_checkpoint_nvram();
6726 }
6727
6728 static void volume_exit(void)
6729 {
6730 if (alsa_card) {
6731 snd_card_free(alsa_card);
6732 alsa_card = NULL;
6733 }
6734
6735 tpacpi_volume_checkpoint_nvram();
6736 }
6737
6738 static int __init volume_create_alsa_mixer(void)
6739 {
6740 struct snd_card *card;
6741 struct tpacpi_alsa_data *data;
6742 struct snd_kcontrol *ctl_vol;
6743 struct snd_kcontrol *ctl_mute;
6744 int rc;
6745
6746 rc = snd_card_create(alsa_index, alsa_id, THIS_MODULE,
6747 sizeof(struct tpacpi_alsa_data), &card);
6748 if (rc < 0 || !card) {
6749 printk(TPACPI_ERR
6750 "Failed to create ALSA card structures: %d\n", rc);
6751 return 1;
6752 }
6753
6754 BUG_ON(!card->private_data);
6755 data = card->private_data;
6756 data->card = card;
6757
6758 strlcpy(card->driver, TPACPI_ALSA_DRVNAME,
6759 sizeof(card->driver));
6760 strlcpy(card->shortname, TPACPI_ALSA_SHRTNAME,
6761 sizeof(card->shortname));
6762 snprintf(card->mixername, sizeof(card->mixername), "ThinkPad EC %s",
6763 (thinkpad_id.ec_version_str) ?
6764 thinkpad_id.ec_version_str : "(unknown)");
6765 snprintf(card->longname, sizeof(card->longname),
6766 "%s at EC reg 0x%02x, fw %s", card->shortname, TP_EC_AUDIO,
6767 (thinkpad_id.ec_version_str) ?
6768 thinkpad_id.ec_version_str : "unknown");
6769
6770 if (volume_control_allowed) {
6771 volume_alsa_control_vol.put = volume_alsa_vol_put;
6772 volume_alsa_control_vol.access =
6773 SNDRV_CTL_ELEM_ACCESS_READWRITE;
6774
6775 volume_alsa_control_mute.put = volume_alsa_mute_put;
6776 volume_alsa_control_mute.access =
6777 SNDRV_CTL_ELEM_ACCESS_READWRITE;
6778 }
6779
6780 if (!tp_features.mixer_no_level_control) {
6781 ctl_vol = snd_ctl_new1(&volume_alsa_control_vol, NULL);
6782 rc = snd_ctl_add(card, ctl_vol);
6783 if (rc < 0) {
6784 printk(TPACPI_ERR
6785 "Failed to create ALSA volume control: %d\n",
6786 rc);
6787 goto err_exit;
6788 }
6789 data->ctl_vol_id = &ctl_vol->id;
6790 }
6791
6792 ctl_mute = snd_ctl_new1(&volume_alsa_control_mute, NULL);
6793 rc = snd_ctl_add(card, ctl_mute);
6794 if (rc < 0) {
6795 printk(TPACPI_ERR "Failed to create ALSA mute control: %d\n",
6796 rc);
6797 goto err_exit;
6798 }
6799 data->ctl_mute_id = &ctl_mute->id;
6800
6801 snd_card_set_dev(card, &tpacpi_pdev->dev);
6802 rc = snd_card_register(card);
6803 if (rc < 0) {
6804 printk(TPACPI_ERR "Failed to register ALSA card: %d\n", rc);
6805 goto err_exit;
6806 }
6807
6808 alsa_card = card;
6809 return 0;
6810
6811 err_exit:
6812 snd_card_free(card);
6813 return 1;
6814 }
6815
6816 #define TPACPI_VOL_Q_MUTEONLY 0x0001 /* Mute-only control available */
6817 #define TPACPI_VOL_Q_LEVEL 0x0002 /* Volume control available */
6818
6819 static const struct tpacpi_quirk volume_quirk_table[] __initconst = {
6820 /* Whitelist volume level on all IBM by default */
6821 { .vendor = PCI_VENDOR_ID_IBM,
6822 .bios = TPACPI_MATCH_ANY,
6823 .ec = TPACPI_MATCH_ANY,
6824 .quirks = TPACPI_VOL_Q_LEVEL },
6825
6826 /* Lenovo models with volume control (needs confirmation) */
6827 TPACPI_QEC_LNV('7', 'C', TPACPI_VOL_Q_LEVEL), /* R60/i */
6828 TPACPI_QEC_LNV('7', 'E', TPACPI_VOL_Q_LEVEL), /* R60e/i */
6829 TPACPI_QEC_LNV('7', '9', TPACPI_VOL_Q_LEVEL), /* T60/p */
6830 TPACPI_QEC_LNV('7', 'B', TPACPI_VOL_Q_LEVEL), /* X60/s */
6831 TPACPI_QEC_LNV('7', 'J', TPACPI_VOL_Q_LEVEL), /* X60t */
6832 TPACPI_QEC_LNV('7', '7', TPACPI_VOL_Q_LEVEL), /* Z60 */
6833 TPACPI_QEC_LNV('7', 'F', TPACPI_VOL_Q_LEVEL), /* Z61 */
6834
6835 /* Whitelist mute-only on all Lenovo by default */
6836 { .vendor = PCI_VENDOR_ID_LENOVO,
6837 .bios = TPACPI_MATCH_ANY,
6838 .ec = TPACPI_MATCH_ANY,
6839 .quirks = TPACPI_VOL_Q_MUTEONLY }
6840 };
6841
6842 static int __init volume_init(struct ibm_init_struct *iibm)
6843 {
6844 unsigned long quirks;
6845 int rc;
6846
6847 vdbg_printk(TPACPI_DBG_INIT, "initializing volume subdriver\n");
6848
6849 mutex_init(&volume_mutex);
6850
6851 /*
6852 * Check for module parameter bogosity, note that we
6853 * init volume_mode to TPACPI_VOL_MODE_MAX in order to be
6854 * able to detect "unspecified"
6855 */
6856 if (volume_mode > TPACPI_VOL_MODE_MAX)
6857 return -EINVAL;
6858
6859 if (volume_mode == TPACPI_VOL_MODE_UCMS_STEP) {
6860 printk(TPACPI_ERR
6861 "UCMS step volume mode not implemented, "
6862 "please contact %s\n", TPACPI_MAIL);
6863 return 1;
6864 }
6865
6866 if (volume_capabilities >= TPACPI_VOL_CAP_MAX)
6867 return -EINVAL;
6868
6869 /*
6870 * The ALSA mixer is our primary interface.
6871 * When disabled, don't install the subdriver at all
6872 */
6873 if (!alsa_enable) {
6874 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
6875 "ALSA mixer disabled by parameter, "
6876 "not loading volume subdriver...\n");
6877 return 1;
6878 }
6879
6880 quirks = tpacpi_check_quirks(volume_quirk_table,
6881 ARRAY_SIZE(volume_quirk_table));
6882
6883 switch (volume_capabilities) {
6884 case TPACPI_VOL_CAP_AUTO:
6885 if (quirks & TPACPI_VOL_Q_MUTEONLY)
6886 tp_features.mixer_no_level_control = 1;
6887 else if (quirks & TPACPI_VOL_Q_LEVEL)
6888 tp_features.mixer_no_level_control = 0;
6889 else
6890 return 1; /* no mixer */
6891 break;
6892 case TPACPI_VOL_CAP_VOLMUTE:
6893 tp_features.mixer_no_level_control = 0;
6894 break;
6895 case TPACPI_VOL_CAP_MUTEONLY:
6896 tp_features.mixer_no_level_control = 1;
6897 break;
6898 default:
6899 return 1;
6900 }
6901
6902 if (volume_capabilities != TPACPI_VOL_CAP_AUTO)
6903 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
6904 "using user-supplied volume_capabilities=%d\n",
6905 volume_capabilities);
6906
6907 if (volume_mode == TPACPI_VOL_MODE_AUTO ||
6908 volume_mode == TPACPI_VOL_MODE_MAX) {
6909 volume_mode = TPACPI_VOL_MODE_ECNVRAM;
6910
6911 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
6912 "driver auto-selected volume_mode=%d\n",
6913 volume_mode);
6914 } else {
6915 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
6916 "using user-supplied volume_mode=%d\n",
6917 volume_mode);
6918 }
6919
6920 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
6921 "mute is supported, volume control is %s\n",
6922 str_supported(!tp_features.mixer_no_level_control));
6923
6924 rc = volume_create_alsa_mixer();
6925 if (rc) {
6926 printk(TPACPI_ERR
6927 "Could not create the ALSA mixer interface\n");
6928 return rc;
6929 }
6930
6931 printk(TPACPI_INFO
6932 "Console audio control enabled, mode: %s\n",
6933 (volume_control_allowed) ?
6934 "override (read/write)" :
6935 "monitor (read only)");
6936
6937 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
6938 "registering volume hotkeys as change notification\n");
6939 tpacpi_hotkey_driver_mask_set(hotkey_driver_mask
6940 | TP_ACPI_HKEY_VOLUP_MASK
6941 | TP_ACPI_HKEY_VOLDWN_MASK
6942 | TP_ACPI_HKEY_MUTE_MASK);
6943
6944 return 0;
6945 }
6946
6947 static int volume_read(struct seq_file *m)
6948 {
6949 u8 status;
6950
6951 if (volume_get_status(&status) < 0) {
6952 seq_printf(m, "level:\t\tunreadable\n");
6953 } else {
6954 if (tp_features.mixer_no_level_control)
6955 seq_printf(m, "level:\t\tunsupported\n");
6956 else
6957 seq_printf(m, "level:\t\t%d\n",
6958 status & TP_EC_AUDIO_LVL_MSK);
6959
6960 seq_printf(m, "mute:\t\t%s\n",
6961 onoff(status, TP_EC_AUDIO_MUTESW));
6962
6963 if (volume_control_allowed) {
6964 seq_printf(m, "commands:\tunmute, mute\n");
6965 if (!tp_features.mixer_no_level_control) {
6966 seq_printf(m,
6967 "commands:\tup, down\n");
6968 seq_printf(m,
6969 "commands:\tlevel <level>"
6970 " (<level> is 0-%d)\n",
6971 TP_EC_VOLUME_MAX);
6972 }
6973 }
6974 }
6975
6976 return 0;
6977 }
6978
6979 static int volume_write(char *buf)
6980 {
6981 u8 s;
6982 u8 new_level, new_mute;
6983 int l;
6984 char *cmd;
6985 int rc;
6986
6987 /*
6988 * We do allow volume control at driver startup, so that the
6989 * user can set initial state through the volume=... parameter hack.
6990 */
6991 if (!volume_control_allowed && tpacpi_lifecycle != TPACPI_LIFE_INIT) {
6992 if (unlikely(!tp_warned.volume_ctrl_forbidden)) {
6993 tp_warned.volume_ctrl_forbidden = 1;
6994 printk(TPACPI_NOTICE
6995 "Console audio control in monitor mode, "
6996 "changes are not allowed.\n");
6997 printk(TPACPI_NOTICE
6998 "Use the volume_control=1 module parameter "
6999 "to enable volume control\n");
7000 }
7001 return -EPERM;
7002 }
7003
7004 rc = volume_get_status(&s);
7005 if (rc < 0)
7006 return rc;
7007
7008 new_level = s & TP_EC_AUDIO_LVL_MSK;
7009 new_mute = s & TP_EC_AUDIO_MUTESW_MSK;
7010
7011 while ((cmd = next_cmd(&buf))) {
7012 if (!tp_features.mixer_no_level_control) {
7013 if (strlencmp(cmd, "up") == 0) {
7014 if (new_mute)
7015 new_mute = 0;
7016 else if (new_level < TP_EC_VOLUME_MAX)
7017 new_level++;
7018 continue;
7019 } else if (strlencmp(cmd, "down") == 0) {
7020 if (new_mute)
7021 new_mute = 0;
7022 else if (new_level > 0)
7023 new_level--;
7024 continue;
7025 } else if (sscanf(cmd, "level %u", &l) == 1 &&
7026 l >= 0 && l <= TP_EC_VOLUME_MAX) {
7027 new_level = l;
7028 continue;
7029 }
7030 }
7031 if (strlencmp(cmd, "mute") == 0)
7032 new_mute = TP_EC_AUDIO_MUTESW_MSK;
7033 else if (strlencmp(cmd, "unmute") == 0)
7034 new_mute = 0;
7035 else
7036 return -EINVAL;
7037 }
7038
7039 if (tp_features.mixer_no_level_control) {
7040 tpacpi_disclose_usertask("procfs volume", "%smute\n",
7041 new_mute ? "" : "un");
7042 rc = volume_set_mute(!!new_mute);
7043 } else {
7044 tpacpi_disclose_usertask("procfs volume",
7045 "%smute and set level to %d\n",
7046 new_mute ? "" : "un", new_level);
7047 rc = volume_set_status(new_mute | new_level);
7048 }
7049 volume_alsa_notify_change();
7050
7051 return (rc == -EINTR) ? -ERESTARTSYS : rc;
7052 }
7053
7054 static struct ibm_struct volume_driver_data = {
7055 .name = "volume",
7056 .read = volume_read,
7057 .write = volume_write,
7058 .exit = volume_exit,
7059 .suspend = volume_suspend,
7060 .resume = volume_resume,
7061 .shutdown = volume_shutdown,
7062 };
7063
7064 #else /* !CONFIG_THINKPAD_ACPI_ALSA_SUPPORT */
7065
7066 #define alsa_card NULL
7067
7068 static void inline volume_alsa_notify_change(void)
7069 {
7070 }
7071
7072 static int __init volume_init(struct ibm_init_struct *iibm)
7073 {
7074 printk(TPACPI_INFO
7075 "volume: disabled as there is no ALSA support in this kernel\n");
7076
7077 return 1;
7078 }
7079
7080 static struct ibm_struct volume_driver_data = {
7081 .name = "volume",
7082 };
7083
7084 #endif /* CONFIG_THINKPAD_ACPI_ALSA_SUPPORT */
7085
7086 /*************************************************************************
7087 * Fan subdriver
7088 */
7089
7090 /*
7091 * FAN ACCESS MODES
7092 *
7093 * TPACPI_FAN_RD_ACPI_GFAN:
7094 * ACPI GFAN method: returns fan level
7095 *
7096 * see TPACPI_FAN_WR_ACPI_SFAN
7097 * EC 0x2f (HFSP) not available if GFAN exists
7098 *
7099 * TPACPI_FAN_WR_ACPI_SFAN:
7100 * ACPI SFAN method: sets fan level, 0 (stop) to 7 (max)
7101 *
7102 * EC 0x2f (HFSP) might be available *for reading*, but do not use
7103 * it for writing.
7104 *
7105 * TPACPI_FAN_WR_TPEC:
7106 * ThinkPad EC register 0x2f (HFSP): fan control loop mode
7107 * Supported on almost all ThinkPads
7108 *
7109 * Fan speed changes of any sort (including those caused by the
7110 * disengaged mode) are usually done slowly by the firmware as the
7111 * maximum ammount of fan duty cycle change per second seems to be
7112 * limited.
7113 *
7114 * Reading is not available if GFAN exists.
7115 * Writing is not available if SFAN exists.
7116 *
7117 * Bits
7118 * 7 automatic mode engaged;
7119 * (default operation mode of the ThinkPad)
7120 * fan level is ignored in this mode.
7121 * 6 full speed mode (takes precedence over bit 7);
7122 * not available on all thinkpads. May disable
7123 * the tachometer while the fan controller ramps up
7124 * the speed (which can take up to a few *minutes*).
7125 * Speeds up fan to 100% duty-cycle, which is far above
7126 * the standard RPM levels. It is not impossible that
7127 * it could cause hardware damage.
7128 * 5-3 unused in some models. Extra bits for fan level
7129 * in others, but still useless as all values above
7130 * 7 map to the same speed as level 7 in these models.
7131 * 2-0 fan level (0..7 usually)
7132 * 0x00 = stop
7133 * 0x07 = max (set when temperatures critical)
7134 * Some ThinkPads may have other levels, see
7135 * TPACPI_FAN_WR_ACPI_FANS (X31/X40/X41)
7136 *
7137 * FIRMWARE BUG: on some models, EC 0x2f might not be initialized at
7138 * boot. Apparently the EC does not intialize it, so unless ACPI DSDT
7139 * does so, its initial value is meaningless (0x07).
7140 *
7141 * For firmware bugs, refer to:
7142 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
7143 *
7144 * ----
7145 *
7146 * ThinkPad EC register 0x84 (LSB), 0x85 (MSB):
7147 * Main fan tachometer reading (in RPM)
7148 *
7149 * This register is present on all ThinkPads with a new-style EC, and
7150 * it is known not to be present on the A21m/e, and T22, as there is
7151 * something else in offset 0x84 according to the ACPI DSDT. Other
7152 * ThinkPads from this same time period (and earlier) probably lack the
7153 * tachometer as well.
7154 *
7155 * Unfortunately a lot of ThinkPads with new-style ECs but whose firmware
7156 * was never fixed by IBM to report the EC firmware version string
7157 * probably support the tachometer (like the early X models), so
7158 * detecting it is quite hard. We need more data to know for sure.
7159 *
7160 * FIRMWARE BUG: always read 0x84 first, otherwise incorrect readings
7161 * might result.
7162 *
7163 * FIRMWARE BUG: may go stale while the EC is switching to full speed
7164 * mode.
7165 *
7166 * For firmware bugs, refer to:
7167 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
7168 *
7169 * ----
7170 *
7171 * ThinkPad EC register 0x31 bit 0 (only on select models)
7172 *
7173 * When bit 0 of EC register 0x31 is zero, the tachometer registers
7174 * show the speed of the main fan. When bit 0 of EC register 0x31
7175 * is one, the tachometer registers show the speed of the auxiliary
7176 * fan.
7177 *
7178 * Fan control seems to affect both fans, regardless of the state
7179 * of this bit.
7180 *
7181 * So far, only the firmware for the X60/X61 non-tablet versions
7182 * seem to support this (firmware TP-7M).
7183 *
7184 * TPACPI_FAN_WR_ACPI_FANS:
7185 * ThinkPad X31, X40, X41. Not available in the X60.
7186 *
7187 * FANS ACPI handle: takes three arguments: low speed, medium speed,
7188 * high speed. ACPI DSDT seems to map these three speeds to levels
7189 * as follows: STOP LOW LOW MED MED HIGH HIGH HIGH HIGH
7190 * (this map is stored on FAN0..FAN8 as "0,1,1,2,2,3,3,3,3")
7191 *
7192 * The speeds are stored on handles
7193 * (FANA:FAN9), (FANC:FANB), (FANE:FAND).
7194 *
7195 * There are three default speed sets, accessible as handles:
7196 * FS1L,FS1M,FS1H; FS2L,FS2M,FS2H; FS3L,FS3M,FS3H
7197 *
7198 * ACPI DSDT switches which set is in use depending on various
7199 * factors.
7200 *
7201 * TPACPI_FAN_WR_TPEC is also available and should be used to
7202 * command the fan. The X31/X40/X41 seems to have 8 fan levels,
7203 * but the ACPI tables just mention level 7.
7204 */
7205
7206 enum { /* Fan control constants */
7207 fan_status_offset = 0x2f, /* EC register 0x2f */
7208 fan_rpm_offset = 0x84, /* EC register 0x84: LSB, 0x85 MSB (RPM)
7209 * 0x84 must be read before 0x85 */
7210 fan_select_offset = 0x31, /* EC register 0x31 (Firmware 7M)
7211 bit 0 selects which fan is active */
7212
7213 TP_EC_FAN_FULLSPEED = 0x40, /* EC fan mode: full speed */
7214 TP_EC_FAN_AUTO = 0x80, /* EC fan mode: auto fan control */
7215
7216 TPACPI_FAN_LAST_LEVEL = 0x100, /* Use cached last-seen fan level */
7217 };
7218
7219 enum fan_status_access_mode {
7220 TPACPI_FAN_NONE = 0, /* No fan status or control */
7221 TPACPI_FAN_RD_ACPI_GFAN, /* Use ACPI GFAN */
7222 TPACPI_FAN_RD_TPEC, /* Use ACPI EC regs 0x2f, 0x84-0x85 */
7223 };
7224
7225 enum fan_control_access_mode {
7226 TPACPI_FAN_WR_NONE = 0, /* No fan control */
7227 TPACPI_FAN_WR_ACPI_SFAN, /* Use ACPI SFAN */
7228 TPACPI_FAN_WR_TPEC, /* Use ACPI EC reg 0x2f */
7229 TPACPI_FAN_WR_ACPI_FANS, /* Use ACPI FANS and EC reg 0x2f */
7230 };
7231
7232 enum fan_control_commands {
7233 TPACPI_FAN_CMD_SPEED = 0x0001, /* speed command */
7234 TPACPI_FAN_CMD_LEVEL = 0x0002, /* level command */
7235 TPACPI_FAN_CMD_ENABLE = 0x0004, /* enable/disable cmd,
7236 * and also watchdog cmd */
7237 };
7238
7239 static int fan_control_allowed;
7240
7241 static enum fan_status_access_mode fan_status_access_mode;
7242 static enum fan_control_access_mode fan_control_access_mode;
7243 static enum fan_control_commands fan_control_commands;
7244
7245 static u8 fan_control_initial_status;
7246 static u8 fan_control_desired_level;
7247 static u8 fan_control_resume_level;
7248 static int fan_watchdog_maxinterval;
7249
7250 static struct mutex fan_mutex;
7251
7252 static void fan_watchdog_fire(struct work_struct *ignored);
7253 static DECLARE_DELAYED_WORK(fan_watchdog_task, fan_watchdog_fire);
7254
7255 TPACPI_HANDLE(fans, ec, "FANS"); /* X31, X40, X41 */
7256 TPACPI_HANDLE(gfan, ec, "GFAN", /* 570 */
7257 "\\FSPD", /* 600e/x, 770e, 770x */
7258 ); /* all others */
7259 TPACPI_HANDLE(sfan, ec, "SFAN", /* 570 */
7260 "JFNS", /* 770x-JL */
7261 ); /* all others */
7262
7263 /*
7264 * Unitialized HFSP quirk: ACPI DSDT and EC fail to initialize the
7265 * HFSP register at boot, so it contains 0x07 but the Thinkpad could
7266 * be in auto mode (0x80).
7267 *
7268 * This is corrected by any write to HFSP either by the driver, or
7269 * by the firmware.
7270 *
7271 * We assume 0x07 really means auto mode while this quirk is active,
7272 * as this is far more likely than the ThinkPad being in level 7,
7273 * which is only used by the firmware during thermal emergencies.
7274 *
7275 * Enable for TP-1Y (T43), TP-78 (R51e), TP-76 (R52),
7276 * TP-70 (T43, R52), which are known to be buggy.
7277 */
7278
7279 static void fan_quirk1_setup(void)
7280 {
7281 if (fan_control_initial_status == 0x07) {
7282 printk(TPACPI_NOTICE
7283 "fan_init: initial fan status is unknown, "
7284 "assuming it is in auto mode\n");
7285 tp_features.fan_ctrl_status_undef = 1;
7286 }
7287 }
7288
7289 static void fan_quirk1_handle(u8 *fan_status)
7290 {
7291 if (unlikely(tp_features.fan_ctrl_status_undef)) {
7292 if (*fan_status != fan_control_initial_status) {
7293 /* something changed the HFSP regisnter since
7294 * driver init time, so it is not undefined
7295 * anymore */
7296 tp_features.fan_ctrl_status_undef = 0;
7297 } else {
7298 /* Return most likely status. In fact, it
7299 * might be the only possible status */
7300 *fan_status = TP_EC_FAN_AUTO;
7301 }
7302 }
7303 }
7304
7305 /* Select main fan on X60/X61, NOOP on others */
7306 static bool fan_select_fan1(void)
7307 {
7308 if (tp_features.second_fan) {
7309 u8 val;
7310
7311 if (ec_read(fan_select_offset, &val) < 0)
7312 return false;
7313 val &= 0xFEU;
7314 if (ec_write(fan_select_offset, val) < 0)
7315 return false;
7316 }
7317 return true;
7318 }
7319
7320 /* Select secondary fan on X60/X61 */
7321 static bool fan_select_fan2(void)
7322 {
7323 u8 val;
7324
7325 if (!tp_features.second_fan)
7326 return false;
7327
7328 if (ec_read(fan_select_offset, &val) < 0)
7329 return false;
7330 val |= 0x01U;
7331 if (ec_write(fan_select_offset, val) < 0)
7332 return false;
7333
7334 return true;
7335 }
7336
7337 /*
7338 * Call with fan_mutex held
7339 */
7340 static void fan_update_desired_level(u8 status)
7341 {
7342 if ((status &
7343 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
7344 if (status > 7)
7345 fan_control_desired_level = 7;
7346 else
7347 fan_control_desired_level = status;
7348 }
7349 }
7350
7351 static int fan_get_status(u8 *status)
7352 {
7353 u8 s;
7354
7355 /* TODO:
7356 * Add TPACPI_FAN_RD_ACPI_FANS ? */
7357
7358 switch (fan_status_access_mode) {
7359 case TPACPI_FAN_RD_ACPI_GFAN:
7360 /* 570, 600e/x, 770e, 770x */
7361
7362 if (unlikely(!acpi_evalf(gfan_handle, &s, NULL, "d")))
7363 return -EIO;
7364
7365 if (likely(status))
7366 *status = s & 0x07;
7367
7368 break;
7369
7370 case TPACPI_FAN_RD_TPEC:
7371 /* all except 570, 600e/x, 770e, 770x */
7372 if (unlikely(!acpi_ec_read(fan_status_offset, &s)))
7373 return -EIO;
7374
7375 if (likely(status)) {
7376 *status = s;
7377 fan_quirk1_handle(status);
7378 }
7379
7380 break;
7381
7382 default:
7383 return -ENXIO;
7384 }
7385
7386 return 0;
7387 }
7388
7389 static int fan_get_status_safe(u8 *status)
7390 {
7391 int rc;
7392 u8 s;
7393
7394 if (mutex_lock_killable(&fan_mutex))
7395 return -ERESTARTSYS;
7396 rc = fan_get_status(&s);
7397 if (!rc)
7398 fan_update_desired_level(s);
7399 mutex_unlock(&fan_mutex);
7400
7401 if (status)
7402 *status = s;
7403
7404 return rc;
7405 }
7406
7407 static int fan_get_speed(unsigned int *speed)
7408 {
7409 u8 hi, lo;
7410
7411 switch (fan_status_access_mode) {
7412 case TPACPI_FAN_RD_TPEC:
7413 /* all except 570, 600e/x, 770e, 770x */
7414 if (unlikely(!fan_select_fan1()))
7415 return -EIO;
7416 if (unlikely(!acpi_ec_read(fan_rpm_offset, &lo) ||
7417 !acpi_ec_read(fan_rpm_offset + 1, &hi)))
7418 return -EIO;
7419
7420 if (likely(speed))
7421 *speed = (hi << 8) | lo;
7422
7423 break;
7424
7425 default:
7426 return -ENXIO;
7427 }
7428
7429 return 0;
7430 }
7431
7432 static int fan2_get_speed(unsigned int *speed)
7433 {
7434 u8 hi, lo;
7435 bool rc;
7436
7437 switch (fan_status_access_mode) {
7438 case TPACPI_FAN_RD_TPEC:
7439 /* all except 570, 600e/x, 770e, 770x */
7440 if (unlikely(!fan_select_fan2()))
7441 return -EIO;
7442 rc = !acpi_ec_read(fan_rpm_offset, &lo) ||
7443 !acpi_ec_read(fan_rpm_offset + 1, &hi);
7444 fan_select_fan1(); /* play it safe */
7445 if (rc)
7446 return -EIO;
7447
7448 if (likely(speed))
7449 *speed = (hi << 8) | lo;
7450
7451 break;
7452
7453 default:
7454 return -ENXIO;
7455 }
7456
7457 return 0;
7458 }
7459
7460 static int fan_set_level(int level)
7461 {
7462 if (!fan_control_allowed)
7463 return -EPERM;
7464
7465 switch (fan_control_access_mode) {
7466 case TPACPI_FAN_WR_ACPI_SFAN:
7467 if (level >= 0 && level <= 7) {
7468 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", level))
7469 return -EIO;
7470 } else
7471 return -EINVAL;
7472 break;
7473
7474 case TPACPI_FAN_WR_ACPI_FANS:
7475 case TPACPI_FAN_WR_TPEC:
7476 if (!(level & TP_EC_FAN_AUTO) &&
7477 !(level & TP_EC_FAN_FULLSPEED) &&
7478 ((level < 0) || (level > 7)))
7479 return -EINVAL;
7480
7481 /* safety net should the EC not support AUTO
7482 * or FULLSPEED mode bits and just ignore them */
7483 if (level & TP_EC_FAN_FULLSPEED)
7484 level |= 7; /* safety min speed 7 */
7485 else if (level & TP_EC_FAN_AUTO)
7486 level |= 4; /* safety min speed 4 */
7487
7488 if (!acpi_ec_write(fan_status_offset, level))
7489 return -EIO;
7490 else
7491 tp_features.fan_ctrl_status_undef = 0;
7492 break;
7493
7494 default:
7495 return -ENXIO;
7496 }
7497
7498 vdbg_printk(TPACPI_DBG_FAN,
7499 "fan control: set fan control register to 0x%02x\n", level);
7500 return 0;
7501 }
7502
7503 static int fan_set_level_safe(int level)
7504 {
7505 int rc;
7506
7507 if (!fan_control_allowed)
7508 return -EPERM;
7509
7510 if (mutex_lock_killable(&fan_mutex))
7511 return -ERESTARTSYS;
7512
7513 if (level == TPACPI_FAN_LAST_LEVEL)
7514 level = fan_control_desired_level;
7515
7516 rc = fan_set_level(level);
7517 if (!rc)
7518 fan_update_desired_level(level);
7519
7520 mutex_unlock(&fan_mutex);
7521 return rc;
7522 }
7523
7524 static int fan_set_enable(void)
7525 {
7526 u8 s;
7527 int rc;
7528
7529 if (!fan_control_allowed)
7530 return -EPERM;
7531
7532 if (mutex_lock_killable(&fan_mutex))
7533 return -ERESTARTSYS;
7534
7535 switch (fan_control_access_mode) {
7536 case TPACPI_FAN_WR_ACPI_FANS:
7537 case TPACPI_FAN_WR_TPEC:
7538 rc = fan_get_status(&s);
7539 if (rc < 0)
7540 break;
7541
7542 /* Don't go out of emergency fan mode */
7543 if (s != 7) {
7544 s &= 0x07;
7545 s |= TP_EC_FAN_AUTO | 4; /* min fan speed 4 */
7546 }
7547
7548 if (!acpi_ec_write(fan_status_offset, s))
7549 rc = -EIO;
7550 else {
7551 tp_features.fan_ctrl_status_undef = 0;
7552 rc = 0;
7553 }
7554 break;
7555
7556 case TPACPI_FAN_WR_ACPI_SFAN:
7557 rc = fan_get_status(&s);
7558 if (rc < 0)
7559 break;
7560
7561 s &= 0x07;
7562
7563 /* Set fan to at least level 4 */
7564 s |= 4;
7565
7566 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", s))
7567 rc = -EIO;
7568 else
7569 rc = 0;
7570 break;
7571
7572 default:
7573 rc = -ENXIO;
7574 }
7575
7576 mutex_unlock(&fan_mutex);
7577
7578 if (!rc)
7579 vdbg_printk(TPACPI_DBG_FAN,
7580 "fan control: set fan control register to 0x%02x\n",
7581 s);
7582 return rc;
7583 }
7584
7585 static int fan_set_disable(void)
7586 {
7587 int rc;
7588
7589 if (!fan_control_allowed)
7590 return -EPERM;
7591
7592 if (mutex_lock_killable(&fan_mutex))
7593 return -ERESTARTSYS;
7594
7595 rc = 0;
7596 switch (fan_control_access_mode) {
7597 case TPACPI_FAN_WR_ACPI_FANS:
7598 case TPACPI_FAN_WR_TPEC:
7599 if (!acpi_ec_write(fan_status_offset, 0x00))
7600 rc = -EIO;
7601 else {
7602 fan_control_desired_level = 0;
7603 tp_features.fan_ctrl_status_undef = 0;
7604 }
7605 break;
7606
7607 case TPACPI_FAN_WR_ACPI_SFAN:
7608 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", 0x00))
7609 rc = -EIO;
7610 else
7611 fan_control_desired_level = 0;
7612 break;
7613
7614 default:
7615 rc = -ENXIO;
7616 }
7617
7618 if (!rc)
7619 vdbg_printk(TPACPI_DBG_FAN,
7620 "fan control: set fan control register to 0\n");
7621
7622 mutex_unlock(&fan_mutex);
7623 return rc;
7624 }
7625
7626 static int fan_set_speed(int speed)
7627 {
7628 int rc;
7629
7630 if (!fan_control_allowed)
7631 return -EPERM;
7632
7633 if (mutex_lock_killable(&fan_mutex))
7634 return -ERESTARTSYS;
7635
7636 rc = 0;
7637 switch (fan_control_access_mode) {
7638 case TPACPI_FAN_WR_ACPI_FANS:
7639 if (speed >= 0 && speed <= 65535) {
7640 if (!acpi_evalf(fans_handle, NULL, NULL, "vddd",
7641 speed, speed, speed))
7642 rc = -EIO;
7643 } else
7644 rc = -EINVAL;
7645 break;
7646
7647 default:
7648 rc = -ENXIO;
7649 }
7650
7651 mutex_unlock(&fan_mutex);
7652 return rc;
7653 }
7654
7655 static void fan_watchdog_reset(void)
7656 {
7657 static int fan_watchdog_active;
7658
7659 if (fan_control_access_mode == TPACPI_FAN_WR_NONE)
7660 return;
7661
7662 if (fan_watchdog_active)
7663 cancel_delayed_work(&fan_watchdog_task);
7664
7665 if (fan_watchdog_maxinterval > 0 &&
7666 tpacpi_lifecycle != TPACPI_LIFE_EXITING) {
7667 fan_watchdog_active = 1;
7668 if (!queue_delayed_work(tpacpi_wq, &fan_watchdog_task,
7669 msecs_to_jiffies(fan_watchdog_maxinterval
7670 * 1000))) {
7671 printk(TPACPI_ERR
7672 "failed to queue the fan watchdog, "
7673 "watchdog will not trigger\n");
7674 }
7675 } else
7676 fan_watchdog_active = 0;
7677 }
7678
7679 static void fan_watchdog_fire(struct work_struct *ignored)
7680 {
7681 int rc;
7682
7683 if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
7684 return;
7685
7686 printk(TPACPI_NOTICE "fan watchdog: enabling fan\n");
7687 rc = fan_set_enable();
7688 if (rc < 0) {
7689 printk(TPACPI_ERR "fan watchdog: error %d while enabling fan, "
7690 "will try again later...\n", -rc);
7691 /* reschedule for later */
7692 fan_watchdog_reset();
7693 }
7694 }
7695
7696 /*
7697 * SYSFS fan layout: hwmon compatible (device)
7698 *
7699 * pwm*_enable:
7700 * 0: "disengaged" mode
7701 * 1: manual mode
7702 * 2: native EC "auto" mode (recommended, hardware default)
7703 *
7704 * pwm*: set speed in manual mode, ignored otherwise.
7705 * 0 is level 0; 255 is level 7. Intermediate points done with linear
7706 * interpolation.
7707 *
7708 * fan*_input: tachometer reading, RPM
7709 *
7710 *
7711 * SYSFS fan layout: extensions
7712 *
7713 * fan_watchdog (driver):
7714 * fan watchdog interval in seconds, 0 disables (default), max 120
7715 */
7716
7717 /* sysfs fan pwm1_enable ----------------------------------------------- */
7718 static ssize_t fan_pwm1_enable_show(struct device *dev,
7719 struct device_attribute *attr,
7720 char *buf)
7721 {
7722 int res, mode;
7723 u8 status;
7724
7725 res = fan_get_status_safe(&status);
7726 if (res)
7727 return res;
7728
7729 if (status & TP_EC_FAN_FULLSPEED) {
7730 mode = 0;
7731 } else if (status & TP_EC_FAN_AUTO) {
7732 mode = 2;
7733 } else
7734 mode = 1;
7735
7736 return snprintf(buf, PAGE_SIZE, "%d\n", mode);
7737 }
7738
7739 static ssize_t fan_pwm1_enable_store(struct device *dev,
7740 struct device_attribute *attr,
7741 const char *buf, size_t count)
7742 {
7743 unsigned long t;
7744 int res, level;
7745
7746 if (parse_strtoul(buf, 2, &t))
7747 return -EINVAL;
7748
7749 tpacpi_disclose_usertask("hwmon pwm1_enable",
7750 "set fan mode to %lu\n", t);
7751
7752 switch (t) {
7753 case 0:
7754 level = TP_EC_FAN_FULLSPEED;
7755 break;
7756 case 1:
7757 level = TPACPI_FAN_LAST_LEVEL;
7758 break;
7759 case 2:
7760 level = TP_EC_FAN_AUTO;
7761 break;
7762 case 3:
7763 /* reserved for software-controlled auto mode */
7764 return -ENOSYS;
7765 default:
7766 return -EINVAL;
7767 }
7768
7769 res = fan_set_level_safe(level);
7770 if (res == -ENXIO)
7771 return -EINVAL;
7772 else if (res < 0)
7773 return res;
7774
7775 fan_watchdog_reset();
7776
7777 return count;
7778 }
7779
7780 static struct device_attribute dev_attr_fan_pwm1_enable =
7781 __ATTR(pwm1_enable, S_IWUSR | S_IRUGO,
7782 fan_pwm1_enable_show, fan_pwm1_enable_store);
7783
7784 /* sysfs fan pwm1 ------------------------------------------------------ */
7785 static ssize_t fan_pwm1_show(struct device *dev,
7786 struct device_attribute *attr,
7787 char *buf)
7788 {
7789 int res;
7790 u8 status;
7791
7792 res = fan_get_status_safe(&status);
7793 if (res)
7794 return res;
7795
7796 if ((status &
7797 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) != 0)
7798 status = fan_control_desired_level;
7799
7800 if (status > 7)
7801 status = 7;
7802
7803 return snprintf(buf, PAGE_SIZE, "%u\n", (status * 255) / 7);
7804 }
7805
7806 static ssize_t fan_pwm1_store(struct device *dev,
7807 struct device_attribute *attr,
7808 const char *buf, size_t count)
7809 {
7810 unsigned long s;
7811 int rc;
7812 u8 status, newlevel;
7813
7814 if (parse_strtoul(buf, 255, &s))
7815 return -EINVAL;
7816
7817 tpacpi_disclose_usertask("hwmon pwm1",
7818 "set fan speed to %lu\n", s);
7819
7820 /* scale down from 0-255 to 0-7 */
7821 newlevel = (s >> 5) & 0x07;
7822
7823 if (mutex_lock_killable(&fan_mutex))
7824 return -ERESTARTSYS;
7825
7826 rc = fan_get_status(&status);
7827 if (!rc && (status &
7828 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
7829 rc = fan_set_level(newlevel);
7830 if (rc == -ENXIO)
7831 rc = -EINVAL;
7832 else if (!rc) {
7833 fan_update_desired_level(newlevel);
7834 fan_watchdog_reset();
7835 }
7836 }
7837
7838 mutex_unlock(&fan_mutex);
7839 return (rc)? rc : count;
7840 }
7841
7842 static struct device_attribute dev_attr_fan_pwm1 =
7843 __ATTR(pwm1, S_IWUSR | S_IRUGO,
7844 fan_pwm1_show, fan_pwm1_store);
7845
7846 /* sysfs fan fan1_input ------------------------------------------------ */
7847 static ssize_t fan_fan1_input_show(struct device *dev,
7848 struct device_attribute *attr,
7849 char *buf)
7850 {
7851 int res;
7852 unsigned int speed;
7853
7854 res = fan_get_speed(&speed);
7855 if (res < 0)
7856 return res;
7857
7858 return snprintf(buf, PAGE_SIZE, "%u\n", speed);
7859 }
7860
7861 static struct device_attribute dev_attr_fan_fan1_input =
7862 __ATTR(fan1_input, S_IRUGO,
7863 fan_fan1_input_show, NULL);
7864
7865 /* sysfs fan fan2_input ------------------------------------------------ */
7866 static ssize_t fan_fan2_input_show(struct device *dev,
7867 struct device_attribute *attr,
7868 char *buf)
7869 {
7870 int res;
7871 unsigned int speed;
7872
7873 res = fan2_get_speed(&speed);
7874 if (res < 0)
7875 return res;
7876
7877 return snprintf(buf, PAGE_SIZE, "%u\n", speed);
7878 }
7879
7880 static struct device_attribute dev_attr_fan_fan2_input =
7881 __ATTR(fan2_input, S_IRUGO,
7882 fan_fan2_input_show, NULL);
7883
7884 /* sysfs fan fan_watchdog (hwmon driver) ------------------------------- */
7885 static ssize_t fan_fan_watchdog_show(struct device_driver *drv,
7886 char *buf)
7887 {
7888 return snprintf(buf, PAGE_SIZE, "%u\n", fan_watchdog_maxinterval);
7889 }
7890
7891 static ssize_t fan_fan_watchdog_store(struct device_driver *drv,
7892 const char *buf, size_t count)
7893 {
7894 unsigned long t;
7895
7896 if (parse_strtoul(buf, 120, &t))
7897 return -EINVAL;
7898
7899 if (!fan_control_allowed)
7900 return -EPERM;
7901
7902 fan_watchdog_maxinterval = t;
7903 fan_watchdog_reset();
7904
7905 tpacpi_disclose_usertask("fan_watchdog", "set to %lu\n", t);
7906
7907 return count;
7908 }
7909
7910 static DRIVER_ATTR(fan_watchdog, S_IWUSR | S_IRUGO,
7911 fan_fan_watchdog_show, fan_fan_watchdog_store);
7912
7913 /* --------------------------------------------------------------------- */
7914 static struct attribute *fan_attributes[] = {
7915 &dev_attr_fan_pwm1_enable.attr, &dev_attr_fan_pwm1.attr,
7916 &dev_attr_fan_fan1_input.attr,
7917 NULL, /* for fan2_input */
7918 NULL
7919 };
7920
7921 static const struct attribute_group fan_attr_group = {
7922 .attrs = fan_attributes,
7923 };
7924
7925 #define TPACPI_FAN_Q1 0x0001 /* Unitialized HFSP */
7926 #define TPACPI_FAN_2FAN 0x0002 /* EC 0x31 bit 0 selects fan2 */
7927
7928 #define TPACPI_FAN_QI(__id1, __id2, __quirks) \
7929 { .vendor = PCI_VENDOR_ID_IBM, \
7930 .bios = TPACPI_MATCH_ANY, \
7931 .ec = TPID(__id1, __id2), \
7932 .quirks = __quirks }
7933
7934 #define TPACPI_FAN_QL(__id1, __id2, __quirks) \
7935 { .vendor = PCI_VENDOR_ID_LENOVO, \
7936 .bios = TPACPI_MATCH_ANY, \
7937 .ec = TPID(__id1, __id2), \
7938 .quirks = __quirks }
7939
7940 static const struct tpacpi_quirk fan_quirk_table[] __initconst = {
7941 TPACPI_FAN_QI('1', 'Y', TPACPI_FAN_Q1),
7942 TPACPI_FAN_QI('7', '8', TPACPI_FAN_Q1),
7943 TPACPI_FAN_QI('7', '6', TPACPI_FAN_Q1),
7944 TPACPI_FAN_QI('7', '0', TPACPI_FAN_Q1),
7945 TPACPI_FAN_QL('7', 'M', TPACPI_FAN_2FAN),
7946 };
7947
7948 #undef TPACPI_FAN_QL
7949 #undef TPACPI_FAN_QI
7950
7951 static int __init fan_init(struct ibm_init_struct *iibm)
7952 {
7953 int rc;
7954 unsigned long quirks;
7955
7956 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
7957 "initializing fan subdriver\n");
7958
7959 mutex_init(&fan_mutex);
7960 fan_status_access_mode = TPACPI_FAN_NONE;
7961 fan_control_access_mode = TPACPI_FAN_WR_NONE;
7962 fan_control_commands = 0;
7963 fan_watchdog_maxinterval = 0;
7964 tp_features.fan_ctrl_status_undef = 0;
7965 tp_features.second_fan = 0;
7966 fan_control_desired_level = 7;
7967
7968 TPACPI_ACPIHANDLE_INIT(fans);
7969 TPACPI_ACPIHANDLE_INIT(gfan);
7970 TPACPI_ACPIHANDLE_INIT(sfan);
7971
7972 quirks = tpacpi_check_quirks(fan_quirk_table,
7973 ARRAY_SIZE(fan_quirk_table));
7974
7975 if (gfan_handle) {
7976 /* 570, 600e/x, 770e, 770x */
7977 fan_status_access_mode = TPACPI_FAN_RD_ACPI_GFAN;
7978 } else {
7979 /* all other ThinkPads: note that even old-style
7980 * ThinkPad ECs supports the fan control register */
7981 if (likely(acpi_ec_read(fan_status_offset,
7982 &fan_control_initial_status))) {
7983 fan_status_access_mode = TPACPI_FAN_RD_TPEC;
7984 if (quirks & TPACPI_FAN_Q1)
7985 fan_quirk1_setup();
7986 if (quirks & TPACPI_FAN_2FAN) {
7987 tp_features.second_fan = 1;
7988 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
7989 "secondary fan support enabled\n");
7990 }
7991 } else {
7992 printk(TPACPI_ERR
7993 "ThinkPad ACPI EC access misbehaving, "
7994 "fan status and control unavailable\n");
7995 return 1;
7996 }
7997 }
7998
7999 if (sfan_handle) {
8000 /* 570, 770x-JL */
8001 fan_control_access_mode = TPACPI_FAN_WR_ACPI_SFAN;
8002 fan_control_commands |=
8003 TPACPI_FAN_CMD_LEVEL | TPACPI_FAN_CMD_ENABLE;
8004 } else {
8005 if (!gfan_handle) {
8006 /* gfan without sfan means no fan control */
8007 /* all other models implement TP EC 0x2f control */
8008
8009 if (fans_handle) {
8010 /* X31, X40, X41 */
8011 fan_control_access_mode =
8012 TPACPI_FAN_WR_ACPI_FANS;
8013 fan_control_commands |=
8014 TPACPI_FAN_CMD_SPEED |
8015 TPACPI_FAN_CMD_LEVEL |
8016 TPACPI_FAN_CMD_ENABLE;
8017 } else {
8018 fan_control_access_mode = TPACPI_FAN_WR_TPEC;
8019 fan_control_commands |=
8020 TPACPI_FAN_CMD_LEVEL |
8021 TPACPI_FAN_CMD_ENABLE;
8022 }
8023 }
8024 }
8025
8026 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
8027 "fan is %s, modes %d, %d\n",
8028 str_supported(fan_status_access_mode != TPACPI_FAN_NONE ||
8029 fan_control_access_mode != TPACPI_FAN_WR_NONE),
8030 fan_status_access_mode, fan_control_access_mode);
8031
8032 /* fan control master switch */
8033 if (!fan_control_allowed) {
8034 fan_control_access_mode = TPACPI_FAN_WR_NONE;
8035 fan_control_commands = 0;
8036 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
8037 "fan control features disabled by parameter\n");
8038 }
8039
8040 /* update fan_control_desired_level */
8041 if (fan_status_access_mode != TPACPI_FAN_NONE)
8042 fan_get_status_safe(NULL);
8043
8044 if (fan_status_access_mode != TPACPI_FAN_NONE ||
8045 fan_control_access_mode != TPACPI_FAN_WR_NONE) {
8046 if (tp_features.second_fan) {
8047 /* attach second fan tachometer */
8048 fan_attributes[ARRAY_SIZE(fan_attributes)-2] =
8049 &dev_attr_fan_fan2_input.attr;
8050 }
8051 rc = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
8052 &fan_attr_group);
8053 if (rc < 0)
8054 return rc;
8055
8056 rc = driver_create_file(&tpacpi_hwmon_pdriver.driver,
8057 &driver_attr_fan_watchdog);
8058 if (rc < 0) {
8059 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
8060 &fan_attr_group);
8061 return rc;
8062 }
8063 return 0;
8064 } else
8065 return 1;
8066 }
8067
8068 static void fan_exit(void)
8069 {
8070 vdbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_FAN,
8071 "cancelling any pending fan watchdog tasks\n");
8072
8073 /* FIXME: can we really do this unconditionally? */
8074 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj, &fan_attr_group);
8075 driver_remove_file(&tpacpi_hwmon_pdriver.driver,
8076 &driver_attr_fan_watchdog);
8077
8078 cancel_delayed_work(&fan_watchdog_task);
8079 flush_workqueue(tpacpi_wq);
8080 }
8081
8082 static void fan_suspend(pm_message_t state)
8083 {
8084 int rc;
8085
8086 if (!fan_control_allowed)
8087 return;
8088
8089 /* Store fan status in cache */
8090 fan_control_resume_level = 0;
8091 rc = fan_get_status_safe(&fan_control_resume_level);
8092 if (rc < 0)
8093 printk(TPACPI_NOTICE
8094 "failed to read fan level for later "
8095 "restore during resume: %d\n", rc);
8096
8097 /* if it is undefined, don't attempt to restore it.
8098 * KEEP THIS LAST */
8099 if (tp_features.fan_ctrl_status_undef)
8100 fan_control_resume_level = 0;
8101 }
8102
8103 static void fan_resume(void)
8104 {
8105 u8 current_level = 7;
8106 bool do_set = false;
8107 int rc;
8108
8109 /* DSDT *always* updates status on resume */
8110 tp_features.fan_ctrl_status_undef = 0;
8111
8112 if (!fan_control_allowed ||
8113 !fan_control_resume_level ||
8114 (fan_get_status_safe(&current_level) < 0))
8115 return;
8116
8117 switch (fan_control_access_mode) {
8118 case TPACPI_FAN_WR_ACPI_SFAN:
8119 /* never decrease fan level */
8120 do_set = (fan_control_resume_level > current_level);
8121 break;
8122 case TPACPI_FAN_WR_ACPI_FANS:
8123 case TPACPI_FAN_WR_TPEC:
8124 /* never decrease fan level, scale is:
8125 * TP_EC_FAN_FULLSPEED > 7 >= TP_EC_FAN_AUTO
8126 *
8127 * We expect the firmware to set either 7 or AUTO, but we
8128 * handle FULLSPEED out of paranoia.
8129 *
8130 * So, we can safely only restore FULLSPEED or 7, anything
8131 * else could slow the fan. Restoring AUTO is useless, at
8132 * best that's exactly what the DSDT already set (it is the
8133 * slower it uses).
8134 *
8135 * Always keep in mind that the DSDT *will* have set the
8136 * fans to what the vendor supposes is the best level. We
8137 * muck with it only to speed the fan up.
8138 */
8139 if (fan_control_resume_level != 7 &&
8140 !(fan_control_resume_level & TP_EC_FAN_FULLSPEED))
8141 return;
8142 else
8143 do_set = !(current_level & TP_EC_FAN_FULLSPEED) &&
8144 (current_level != fan_control_resume_level);
8145 break;
8146 default:
8147 return;
8148 }
8149 if (do_set) {
8150 printk(TPACPI_NOTICE
8151 "restoring fan level to 0x%02x\n",
8152 fan_control_resume_level);
8153 rc = fan_set_level_safe(fan_control_resume_level);
8154 if (rc < 0)
8155 printk(TPACPI_NOTICE
8156 "failed to restore fan level: %d\n", rc);
8157 }
8158 }
8159
8160 static int fan_read(struct seq_file *m)
8161 {
8162 int rc;
8163 u8 status;
8164 unsigned int speed = 0;
8165
8166 switch (fan_status_access_mode) {
8167 case TPACPI_FAN_RD_ACPI_GFAN:
8168 /* 570, 600e/x, 770e, 770x */
8169 rc = fan_get_status_safe(&status);
8170 if (rc < 0)
8171 return rc;
8172
8173 seq_printf(m, "status:\t\t%s\n"
8174 "level:\t\t%d\n",
8175 (status != 0) ? "enabled" : "disabled", status);
8176 break;
8177
8178 case TPACPI_FAN_RD_TPEC:
8179 /* all except 570, 600e/x, 770e, 770x */
8180 rc = fan_get_status_safe(&status);
8181 if (rc < 0)
8182 return rc;
8183
8184 seq_printf(m, "status:\t\t%s\n",
8185 (status != 0) ? "enabled" : "disabled");
8186
8187 rc = fan_get_speed(&speed);
8188 if (rc < 0)
8189 return rc;
8190
8191 seq_printf(m, "speed:\t\t%d\n", speed);
8192
8193 if (status & TP_EC_FAN_FULLSPEED)
8194 /* Disengaged mode takes precedence */
8195 seq_printf(m, "level:\t\tdisengaged\n");
8196 else if (status & TP_EC_FAN_AUTO)
8197 seq_printf(m, "level:\t\tauto\n");
8198 else
8199 seq_printf(m, "level:\t\t%d\n", status);
8200 break;
8201
8202 case TPACPI_FAN_NONE:
8203 default:
8204 seq_printf(m, "status:\t\tnot supported\n");
8205 }
8206
8207 if (fan_control_commands & TPACPI_FAN_CMD_LEVEL) {
8208 seq_printf(m, "commands:\tlevel <level>");
8209
8210 switch (fan_control_access_mode) {
8211 case TPACPI_FAN_WR_ACPI_SFAN:
8212 seq_printf(m, " (<level> is 0-7)\n");
8213 break;
8214
8215 default:
8216 seq_printf(m, " (<level> is 0-7, "
8217 "auto, disengaged, full-speed)\n");
8218 break;
8219 }
8220 }
8221
8222 if (fan_control_commands & TPACPI_FAN_CMD_ENABLE)
8223 seq_printf(m, "commands:\tenable, disable\n"
8224 "commands:\twatchdog <timeout> (<timeout> "
8225 "is 0 (off), 1-120 (seconds))\n");
8226
8227 if (fan_control_commands & TPACPI_FAN_CMD_SPEED)
8228 seq_printf(m, "commands:\tspeed <speed>"
8229 " (<speed> is 0-65535)\n");
8230
8231 return 0;
8232 }
8233
8234 static int fan_write_cmd_level(const char *cmd, int *rc)
8235 {
8236 int level;
8237
8238 if (strlencmp(cmd, "level auto") == 0)
8239 level = TP_EC_FAN_AUTO;
8240 else if ((strlencmp(cmd, "level disengaged") == 0) |
8241 (strlencmp(cmd, "level full-speed") == 0))
8242 level = TP_EC_FAN_FULLSPEED;
8243 else if (sscanf(cmd, "level %d", &level) != 1)
8244 return 0;
8245
8246 *rc = fan_set_level_safe(level);
8247 if (*rc == -ENXIO)
8248 printk(TPACPI_ERR "level command accepted for unsupported "
8249 "access mode %d", fan_control_access_mode);
8250 else if (!*rc)
8251 tpacpi_disclose_usertask("procfs fan",
8252 "set level to %d\n", level);
8253
8254 return 1;
8255 }
8256
8257 static int fan_write_cmd_enable(const char *cmd, int *rc)
8258 {
8259 if (strlencmp(cmd, "enable") != 0)
8260 return 0;
8261
8262 *rc = fan_set_enable();
8263 if (*rc == -ENXIO)
8264 printk(TPACPI_ERR "enable command accepted for unsupported "
8265 "access mode %d", fan_control_access_mode);
8266 else if (!*rc)
8267 tpacpi_disclose_usertask("procfs fan", "enable\n");
8268
8269 return 1;
8270 }
8271
8272 static int fan_write_cmd_disable(const char *cmd, int *rc)
8273 {
8274 if (strlencmp(cmd, "disable") != 0)
8275 return 0;
8276
8277 *rc = fan_set_disable();
8278 if (*rc == -ENXIO)
8279 printk(TPACPI_ERR "disable command accepted for unsupported "
8280 "access mode %d", fan_control_access_mode);
8281 else if (!*rc)
8282 tpacpi_disclose_usertask("procfs fan", "disable\n");
8283
8284 return 1;
8285 }
8286
8287 static int fan_write_cmd_speed(const char *cmd, int *rc)
8288 {
8289 int speed;
8290
8291 /* TODO:
8292 * Support speed <low> <medium> <high> ? */
8293
8294 if (sscanf(cmd, "speed %d", &speed) != 1)
8295 return 0;
8296
8297 *rc = fan_set_speed(speed);
8298 if (*rc == -ENXIO)
8299 printk(TPACPI_ERR "speed command accepted for unsupported "
8300 "access mode %d", fan_control_access_mode);
8301 else if (!*rc)
8302 tpacpi_disclose_usertask("procfs fan",
8303 "set speed to %d\n", speed);
8304
8305 return 1;
8306 }
8307
8308 static int fan_write_cmd_watchdog(const char *cmd, int *rc)
8309 {
8310 int interval;
8311
8312 if (sscanf(cmd, "watchdog %d", &interval) != 1)
8313 return 0;
8314
8315 if (interval < 0 || interval > 120)
8316 *rc = -EINVAL;
8317 else {
8318 fan_watchdog_maxinterval = interval;
8319 tpacpi_disclose_usertask("procfs fan",
8320 "set watchdog timer to %d\n",
8321 interval);
8322 }
8323
8324 return 1;
8325 }
8326
8327 static int fan_write(char *buf)
8328 {
8329 char *cmd;
8330 int rc = 0;
8331
8332 while (!rc && (cmd = next_cmd(&buf))) {
8333 if (!((fan_control_commands & TPACPI_FAN_CMD_LEVEL) &&
8334 fan_write_cmd_level(cmd, &rc)) &&
8335 !((fan_control_commands & TPACPI_FAN_CMD_ENABLE) &&
8336 (fan_write_cmd_enable(cmd, &rc) ||
8337 fan_write_cmd_disable(cmd, &rc) ||
8338 fan_write_cmd_watchdog(cmd, &rc))) &&
8339 !((fan_control_commands & TPACPI_FAN_CMD_SPEED) &&
8340 fan_write_cmd_speed(cmd, &rc))
8341 )
8342 rc = -EINVAL;
8343 else if (!rc)
8344 fan_watchdog_reset();
8345 }
8346
8347 return rc;
8348 }
8349
8350 static struct ibm_struct fan_driver_data = {
8351 .name = "fan",
8352 .read = fan_read,
8353 .write = fan_write,
8354 .exit = fan_exit,
8355 .suspend = fan_suspend,
8356 .resume = fan_resume,
8357 };
8358
8359 /****************************************************************************
8360 ****************************************************************************
8361 *
8362 * Infrastructure
8363 *
8364 ****************************************************************************
8365 ****************************************************************************/
8366
8367 /*
8368 * HKEY event callout for other subdrivers go here
8369 * (yes, it is ugly, but it is quick, safe, and gets the job done
8370 */
8371 static void tpacpi_driver_event(const unsigned int hkey_event)
8372 {
8373 if (ibm_backlight_device) {
8374 switch (hkey_event) {
8375 case TP_HKEY_EV_BRGHT_UP:
8376 case TP_HKEY_EV_BRGHT_DOWN:
8377 tpacpi_brightness_notify_change();
8378 }
8379 }
8380 if (alsa_card) {
8381 switch (hkey_event) {
8382 case TP_HKEY_EV_VOL_UP:
8383 case TP_HKEY_EV_VOL_DOWN:
8384 case TP_HKEY_EV_VOL_MUTE:
8385 volume_alsa_notify_change();
8386 }
8387 }
8388 }
8389
8390 static void hotkey_driver_event(const unsigned int scancode)
8391 {
8392 tpacpi_driver_event(TP_HKEY_EV_HOTKEY_BASE + scancode);
8393 }
8394
8395 /* sysfs name ---------------------------------------------------------- */
8396 static ssize_t thinkpad_acpi_pdev_name_show(struct device *dev,
8397 struct device_attribute *attr,
8398 char *buf)
8399 {
8400 return snprintf(buf, PAGE_SIZE, "%s\n", TPACPI_NAME);
8401 }
8402
8403 static struct device_attribute dev_attr_thinkpad_acpi_pdev_name =
8404 __ATTR(name, S_IRUGO, thinkpad_acpi_pdev_name_show, NULL);
8405
8406 /* --------------------------------------------------------------------- */
8407
8408 /* /proc support */
8409 static struct proc_dir_entry *proc_dir;
8410
8411 /*
8412 * Module and infrastructure proble, init and exit handling
8413 */
8414
8415 static int force_load;
8416
8417 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
8418 static const char * __init str_supported(int is_supported)
8419 {
8420 static char text_unsupported[] __initdata = "not supported";
8421
8422 return (is_supported)? &text_unsupported[4] : &text_unsupported[0];
8423 }
8424 #endif /* CONFIG_THINKPAD_ACPI_DEBUG */
8425
8426 static void ibm_exit(struct ibm_struct *ibm)
8427 {
8428 dbg_printk(TPACPI_DBG_EXIT, "removing %s\n", ibm->name);
8429
8430 list_del_init(&ibm->all_drivers);
8431
8432 if (ibm->flags.acpi_notify_installed) {
8433 dbg_printk(TPACPI_DBG_EXIT,
8434 "%s: acpi_remove_notify_handler\n", ibm->name);
8435 BUG_ON(!ibm->acpi);
8436 acpi_remove_notify_handler(*ibm->acpi->handle,
8437 ibm->acpi->type,
8438 dispatch_acpi_notify);
8439 ibm->flags.acpi_notify_installed = 0;
8440 ibm->flags.acpi_notify_installed = 0;
8441 }
8442
8443 if (ibm->flags.proc_created) {
8444 dbg_printk(TPACPI_DBG_EXIT,
8445 "%s: remove_proc_entry\n", ibm->name);
8446 remove_proc_entry(ibm->name, proc_dir);
8447 ibm->flags.proc_created = 0;
8448 }
8449
8450 if (ibm->flags.acpi_driver_registered) {
8451 dbg_printk(TPACPI_DBG_EXIT,
8452 "%s: acpi_bus_unregister_driver\n", ibm->name);
8453 BUG_ON(!ibm->acpi);
8454 acpi_bus_unregister_driver(ibm->acpi->driver);
8455 kfree(ibm->acpi->driver);
8456 ibm->acpi->driver = NULL;
8457 ibm->flags.acpi_driver_registered = 0;
8458 }
8459
8460 if (ibm->flags.init_called && ibm->exit) {
8461 ibm->exit();
8462 ibm->flags.init_called = 0;
8463 }
8464
8465 dbg_printk(TPACPI_DBG_INIT, "finished removing %s\n", ibm->name);
8466 }
8467
8468 static int __init ibm_init(struct ibm_init_struct *iibm)
8469 {
8470 int ret;
8471 struct ibm_struct *ibm = iibm->data;
8472 struct proc_dir_entry *entry;
8473
8474 BUG_ON(ibm == NULL);
8475
8476 INIT_LIST_HEAD(&ibm->all_drivers);
8477
8478 if (ibm->flags.experimental && !experimental)
8479 return 0;
8480
8481 dbg_printk(TPACPI_DBG_INIT,
8482 "probing for %s\n", ibm->name);
8483
8484 if (iibm->init) {
8485 ret = iibm->init(iibm);
8486 if (ret > 0)
8487 return 0; /* probe failed */
8488 if (ret)
8489 return ret;
8490
8491 ibm->flags.init_called = 1;
8492 }
8493
8494 if (ibm->acpi) {
8495 if (ibm->acpi->hid) {
8496 ret = register_tpacpi_subdriver(ibm);
8497 if (ret)
8498 goto err_out;
8499 }
8500
8501 if (ibm->acpi->notify) {
8502 ret = setup_acpi_notify(ibm);
8503 if (ret == -ENODEV) {
8504 printk(TPACPI_NOTICE "disabling subdriver %s\n",
8505 ibm->name);
8506 ret = 0;
8507 goto err_out;
8508 }
8509 if (ret < 0)
8510 goto err_out;
8511 }
8512 }
8513
8514 dbg_printk(TPACPI_DBG_INIT,
8515 "%s installed\n", ibm->name);
8516
8517 if (ibm->read) {
8518 mode_t mode = iibm->base_procfs_mode;
8519
8520 if (!mode)
8521 mode = S_IRUGO;
8522 if (ibm->write)
8523 mode |= S_IWUSR;
8524 entry = proc_create_data(ibm->name, mode, proc_dir,
8525 &dispatch_proc_fops, ibm);
8526 if (!entry) {
8527 printk(TPACPI_ERR "unable to create proc entry %s\n",
8528 ibm->name);
8529 ret = -ENODEV;
8530 goto err_out;
8531 }
8532 ibm->flags.proc_created = 1;
8533 }
8534
8535 list_add_tail(&ibm->all_drivers, &tpacpi_all_drivers);
8536
8537 return 0;
8538
8539 err_out:
8540 dbg_printk(TPACPI_DBG_INIT,
8541 "%s: at error exit path with result %d\n",
8542 ibm->name, ret);
8543
8544 ibm_exit(ibm);
8545 return (ret < 0)? ret : 0;
8546 }
8547
8548 /* Probing */
8549
8550 static bool __pure __init tpacpi_is_fw_digit(const char c)
8551 {
8552 return (c >= '0' && c <= '9') || (c >= 'A' && c <= 'Z');
8553 }
8554
8555 /* Most models: xxyTkkWW (#.##c); Ancient 570/600 and -SL lacks (#.##c) */
8556 static bool __pure __init tpacpi_is_valid_fw_id(const char* const s,
8557 const char t)
8558 {
8559 return s && strlen(s) >= 8 &&
8560 tpacpi_is_fw_digit(s[0]) &&
8561 tpacpi_is_fw_digit(s[1]) &&
8562 s[2] == t && s[3] == 'T' &&
8563 tpacpi_is_fw_digit(s[4]) &&
8564 tpacpi_is_fw_digit(s[5]) &&
8565 s[6] == 'W' && s[7] == 'W';
8566 }
8567
8568 /* returns 0 - probe ok, or < 0 - probe error.
8569 * Probe ok doesn't mean thinkpad found.
8570 * On error, kfree() cleanup on tp->* is not performed, caller must do it */
8571 static int __must_check __init get_thinkpad_model_data(
8572 struct thinkpad_id_data *tp)
8573 {
8574 const struct dmi_device *dev = NULL;
8575 char ec_fw_string[18];
8576 char const *s;
8577
8578 if (!tp)
8579 return -EINVAL;
8580
8581 memset(tp, 0, sizeof(*tp));
8582
8583 if (dmi_name_in_vendors("IBM"))
8584 tp->vendor = PCI_VENDOR_ID_IBM;
8585 else if (dmi_name_in_vendors("LENOVO"))
8586 tp->vendor = PCI_VENDOR_ID_LENOVO;
8587 else
8588 return 0;
8589
8590 s = dmi_get_system_info(DMI_BIOS_VERSION);
8591 tp->bios_version_str = kstrdup(s, GFP_KERNEL);
8592 if (s && !tp->bios_version_str)
8593 return -ENOMEM;
8594
8595 /* Really ancient ThinkPad 240X will fail this, which is fine */
8596 if (!tpacpi_is_valid_fw_id(tp->bios_version_str, 'E'))
8597 return 0;
8598
8599 tp->bios_model = tp->bios_version_str[0]
8600 | (tp->bios_version_str[1] << 8);
8601 tp->bios_release = (tp->bios_version_str[4] << 8)
8602 | tp->bios_version_str[5];
8603
8604 /*
8605 * ThinkPad T23 or newer, A31 or newer, R50e or newer,
8606 * X32 or newer, all Z series; Some models must have an
8607 * up-to-date BIOS or they will not be detected.
8608 *
8609 * See http://thinkwiki.org/wiki/List_of_DMI_IDs
8610 */
8611 while ((dev = dmi_find_device(DMI_DEV_TYPE_OEM_STRING, NULL, dev))) {
8612 if (sscanf(dev->name,
8613 "IBM ThinkPad Embedded Controller -[%17c",
8614 ec_fw_string) == 1) {
8615 ec_fw_string[sizeof(ec_fw_string) - 1] = 0;
8616 ec_fw_string[strcspn(ec_fw_string, " ]")] = 0;
8617
8618 tp->ec_version_str = kstrdup(ec_fw_string, GFP_KERNEL);
8619 if (!tp->ec_version_str)
8620 return -ENOMEM;
8621
8622 if (tpacpi_is_valid_fw_id(ec_fw_string, 'H')) {
8623 tp->ec_model = ec_fw_string[0]
8624 | (ec_fw_string[1] << 8);
8625 tp->ec_release = (ec_fw_string[4] << 8)
8626 | ec_fw_string[5];
8627 } else {
8628 printk(TPACPI_NOTICE
8629 "ThinkPad firmware release %s "
8630 "doesn't match the known patterns\n",
8631 ec_fw_string);
8632 printk(TPACPI_NOTICE
8633 "please report this to %s\n",
8634 TPACPI_MAIL);
8635 }
8636 break;
8637 }
8638 }
8639
8640 s = dmi_get_system_info(DMI_PRODUCT_VERSION);
8641 if (s && !strnicmp(s, "ThinkPad", 8)) {
8642 tp->model_str = kstrdup(s, GFP_KERNEL);
8643 if (!tp->model_str)
8644 return -ENOMEM;
8645 }
8646
8647 s = dmi_get_system_info(DMI_PRODUCT_NAME);
8648 tp->nummodel_str = kstrdup(s, GFP_KERNEL);
8649 if (s && !tp->nummodel_str)
8650 return -ENOMEM;
8651
8652 return 0;
8653 }
8654
8655 static int __init probe_for_thinkpad(void)
8656 {
8657 int is_thinkpad;
8658
8659 if (acpi_disabled)
8660 return -ENODEV;
8661
8662 /*
8663 * Non-ancient models have better DMI tagging, but very old models
8664 * don't. tpacpi_is_fw_known() is a cheat to help in that case.
8665 */
8666 is_thinkpad = (thinkpad_id.model_str != NULL) ||
8667 (thinkpad_id.ec_model != 0) ||
8668 tpacpi_is_fw_known();
8669
8670 /* ec is required because many other handles are relative to it */
8671 TPACPI_ACPIHANDLE_INIT(ec);
8672 if (!ec_handle) {
8673 if (is_thinkpad)
8674 printk(TPACPI_ERR
8675 "Not yet supported ThinkPad detected!\n");
8676 return -ENODEV;
8677 }
8678
8679 if (!is_thinkpad && !force_load)
8680 return -ENODEV;
8681
8682 return 0;
8683 }
8684
8685
8686 /* Module init, exit, parameters */
8687
8688 static struct ibm_init_struct ibms_init[] __initdata = {
8689 {
8690 .init = thinkpad_acpi_driver_init,
8691 .data = &thinkpad_acpi_driver_data,
8692 },
8693 {
8694 .init = hotkey_init,
8695 .data = &hotkey_driver_data,
8696 },
8697 {
8698 .init = bluetooth_init,
8699 .data = &bluetooth_driver_data,
8700 },
8701 {
8702 .init = wan_init,
8703 .data = &wan_driver_data,
8704 },
8705 {
8706 .init = uwb_init,
8707 .data = &uwb_driver_data,
8708 },
8709 #ifdef CONFIG_THINKPAD_ACPI_VIDEO
8710 {
8711 .init = video_init,
8712 .base_procfs_mode = S_IRUSR,
8713 .data = &video_driver_data,
8714 },
8715 #endif
8716 {
8717 .init = light_init,
8718 .data = &light_driver_data,
8719 },
8720 {
8721 .init = cmos_init,
8722 .data = &cmos_driver_data,
8723 },
8724 {
8725 .init = led_init,
8726 .data = &led_driver_data,
8727 },
8728 {
8729 .init = beep_init,
8730 .data = &beep_driver_data,
8731 },
8732 {
8733 .init = thermal_init,
8734 .data = &thermal_driver_data,
8735 },
8736 {
8737 .data = &ecdump_driver_data,
8738 },
8739 {
8740 .init = brightness_init,
8741 .data = &brightness_driver_data,
8742 },
8743 {
8744 .init = volume_init,
8745 .data = &volume_driver_data,
8746 },
8747 {
8748 .init = fan_init,
8749 .data = &fan_driver_data,
8750 },
8751 };
8752
8753 static int __init set_ibm_param(const char *val, struct kernel_param *kp)
8754 {
8755 unsigned int i;
8756 struct ibm_struct *ibm;
8757
8758 if (!kp || !kp->name || !val)
8759 return -EINVAL;
8760
8761 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
8762 ibm = ibms_init[i].data;
8763 WARN_ON(ibm == NULL);
8764
8765 if (!ibm || !ibm->name)
8766 continue;
8767
8768 if (strcmp(ibm->name, kp->name) == 0 && ibm->write) {
8769 if (strlen(val) > sizeof(ibms_init[i].param) - 2)
8770 return -ENOSPC;
8771 strcpy(ibms_init[i].param, val);
8772 strcat(ibms_init[i].param, ",");
8773 return 0;
8774 }
8775 }
8776
8777 return -EINVAL;
8778 }
8779
8780 module_param(experimental, int, 0444);
8781 MODULE_PARM_DESC(experimental,
8782 "Enables experimental features when non-zero");
8783
8784 module_param_named(debug, dbg_level, uint, 0);
8785 MODULE_PARM_DESC(debug, "Sets debug level bit-mask");
8786
8787 module_param(force_load, bool, 0444);
8788 MODULE_PARM_DESC(force_load,
8789 "Attempts to load the driver even on a "
8790 "mis-identified ThinkPad when true");
8791
8792 module_param_named(fan_control, fan_control_allowed, bool, 0444);
8793 MODULE_PARM_DESC(fan_control,
8794 "Enables setting fan parameters features when true");
8795
8796 module_param_named(brightness_mode, brightness_mode, uint, 0444);
8797 MODULE_PARM_DESC(brightness_mode,
8798 "Selects brightness control strategy: "
8799 "0=auto, 1=EC, 2=UCMS, 3=EC+NVRAM");
8800
8801 module_param(brightness_enable, uint, 0444);
8802 MODULE_PARM_DESC(brightness_enable,
8803 "Enables backlight control when 1, disables when 0");
8804
8805 module_param(hotkey_report_mode, uint, 0444);
8806 MODULE_PARM_DESC(hotkey_report_mode,
8807 "used for backwards compatibility with userspace, "
8808 "see documentation");
8809
8810 #ifdef CONFIG_THINKPAD_ACPI_ALSA_SUPPORT
8811 module_param_named(volume_mode, volume_mode, uint, 0444);
8812 MODULE_PARM_DESC(volume_mode,
8813 "Selects volume control strategy: "
8814 "0=auto, 1=EC, 2=N/A, 3=EC+NVRAM");
8815
8816 module_param_named(volume_capabilities, volume_capabilities, uint, 0444);
8817 MODULE_PARM_DESC(volume_capabilities,
8818 "Selects the mixer capabilites: "
8819 "0=auto, 1=volume and mute, 2=mute only");
8820
8821 module_param_named(volume_control, volume_control_allowed, bool, 0444);
8822 MODULE_PARM_DESC(volume_control,
8823 "Enables software override for the console audio "
8824 "control when true");
8825
8826 /* ALSA module API parameters */
8827 module_param_named(index, alsa_index, int, 0444);
8828 MODULE_PARM_DESC(index, "ALSA index for the ACPI EC Mixer");
8829 module_param_named(id, alsa_id, charp, 0444);
8830 MODULE_PARM_DESC(id, "ALSA id for the ACPI EC Mixer");
8831 module_param_named(enable, alsa_enable, bool, 0444);
8832 MODULE_PARM_DESC(enable, "Enable the ALSA interface for the ACPI EC Mixer");
8833 #endif /* CONFIG_THINKPAD_ACPI_ALSA_SUPPORT */
8834
8835 #define TPACPI_PARAM(feature) \
8836 module_param_call(feature, set_ibm_param, NULL, NULL, 0); \
8837 MODULE_PARM_DESC(feature, "Simulates thinkpad-acpi procfs command " \
8838 "at module load, see documentation")
8839
8840 TPACPI_PARAM(hotkey);
8841 TPACPI_PARAM(bluetooth);
8842 TPACPI_PARAM(video);
8843 TPACPI_PARAM(light);
8844 TPACPI_PARAM(cmos);
8845 TPACPI_PARAM(led);
8846 TPACPI_PARAM(beep);
8847 TPACPI_PARAM(ecdump);
8848 TPACPI_PARAM(brightness);
8849 TPACPI_PARAM(volume);
8850 TPACPI_PARAM(fan);
8851
8852 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
8853 module_param(dbg_wlswemul, uint, 0444);
8854 MODULE_PARM_DESC(dbg_wlswemul, "Enables WLSW emulation");
8855 module_param_named(wlsw_state, tpacpi_wlsw_emulstate, bool, 0);
8856 MODULE_PARM_DESC(wlsw_state,
8857 "Initial state of the emulated WLSW switch");
8858
8859 module_param(dbg_bluetoothemul, uint, 0444);
8860 MODULE_PARM_DESC(dbg_bluetoothemul, "Enables bluetooth switch emulation");
8861 module_param_named(bluetooth_state, tpacpi_bluetooth_emulstate, bool, 0);
8862 MODULE_PARM_DESC(bluetooth_state,
8863 "Initial state of the emulated bluetooth switch");
8864
8865 module_param(dbg_wwanemul, uint, 0444);
8866 MODULE_PARM_DESC(dbg_wwanemul, "Enables WWAN switch emulation");
8867 module_param_named(wwan_state, tpacpi_wwan_emulstate, bool, 0);
8868 MODULE_PARM_DESC(wwan_state,
8869 "Initial state of the emulated WWAN switch");
8870
8871 module_param(dbg_uwbemul, uint, 0444);
8872 MODULE_PARM_DESC(dbg_uwbemul, "Enables UWB switch emulation");
8873 module_param_named(uwb_state, tpacpi_uwb_emulstate, bool, 0);
8874 MODULE_PARM_DESC(uwb_state,
8875 "Initial state of the emulated UWB switch");
8876 #endif
8877
8878 static void thinkpad_acpi_module_exit(void)
8879 {
8880 struct ibm_struct *ibm, *itmp;
8881
8882 tpacpi_lifecycle = TPACPI_LIFE_EXITING;
8883
8884 list_for_each_entry_safe_reverse(ibm, itmp,
8885 &tpacpi_all_drivers,
8886 all_drivers) {
8887 ibm_exit(ibm);
8888 }
8889
8890 dbg_printk(TPACPI_DBG_INIT, "finished subdriver exit path...\n");
8891
8892 if (tpacpi_inputdev) {
8893 if (tp_features.input_device_registered)
8894 input_unregister_device(tpacpi_inputdev);
8895 else
8896 input_free_device(tpacpi_inputdev);
8897 }
8898
8899 if (tpacpi_hwmon)
8900 hwmon_device_unregister(tpacpi_hwmon);
8901
8902 if (tp_features.sensors_pdev_attrs_registered)
8903 device_remove_file(&tpacpi_sensors_pdev->dev,
8904 &dev_attr_thinkpad_acpi_pdev_name);
8905 if (tpacpi_sensors_pdev)
8906 platform_device_unregister(tpacpi_sensors_pdev);
8907 if (tpacpi_pdev)
8908 platform_device_unregister(tpacpi_pdev);
8909
8910 if (tp_features.sensors_pdrv_attrs_registered)
8911 tpacpi_remove_driver_attributes(&tpacpi_hwmon_pdriver.driver);
8912 if (tp_features.platform_drv_attrs_registered)
8913 tpacpi_remove_driver_attributes(&tpacpi_pdriver.driver);
8914
8915 if (tp_features.sensors_pdrv_registered)
8916 platform_driver_unregister(&tpacpi_hwmon_pdriver);
8917
8918 if (tp_features.platform_drv_registered)
8919 platform_driver_unregister(&tpacpi_pdriver);
8920
8921 if (proc_dir)
8922 remove_proc_entry(TPACPI_PROC_DIR, acpi_root_dir);
8923
8924 if (tpacpi_wq)
8925 destroy_workqueue(tpacpi_wq);
8926
8927 kfree(thinkpad_id.bios_version_str);
8928 kfree(thinkpad_id.ec_version_str);
8929 kfree(thinkpad_id.model_str);
8930 }
8931
8932
8933 static int __init thinkpad_acpi_module_init(void)
8934 {
8935 int ret, i;
8936
8937 tpacpi_lifecycle = TPACPI_LIFE_INIT;
8938
8939 /* Parameter checking */
8940 if (hotkey_report_mode > 2)
8941 return -EINVAL;
8942
8943 /* Driver-level probe */
8944
8945 ret = get_thinkpad_model_data(&thinkpad_id);
8946 if (ret) {
8947 printk(TPACPI_ERR
8948 "unable to get DMI data: %d\n", ret);
8949 thinkpad_acpi_module_exit();
8950 return ret;
8951 }
8952 ret = probe_for_thinkpad();
8953 if (ret) {
8954 thinkpad_acpi_module_exit();
8955 return ret;
8956 }
8957
8958 /* Driver initialization */
8959
8960 TPACPI_ACPIHANDLE_INIT(ecrd);
8961 TPACPI_ACPIHANDLE_INIT(ecwr);
8962
8963 tpacpi_wq = create_singlethread_workqueue(TPACPI_WORKQUEUE_NAME);
8964 if (!tpacpi_wq) {
8965 thinkpad_acpi_module_exit();
8966 return -ENOMEM;
8967 }
8968
8969 proc_dir = proc_mkdir(TPACPI_PROC_DIR, acpi_root_dir);
8970 if (!proc_dir) {
8971 printk(TPACPI_ERR
8972 "unable to create proc dir " TPACPI_PROC_DIR);
8973 thinkpad_acpi_module_exit();
8974 return -ENODEV;
8975 }
8976
8977 ret = platform_driver_register(&tpacpi_pdriver);
8978 if (ret) {
8979 printk(TPACPI_ERR
8980 "unable to register main platform driver\n");
8981 thinkpad_acpi_module_exit();
8982 return ret;
8983 }
8984 tp_features.platform_drv_registered = 1;
8985
8986 ret = platform_driver_register(&tpacpi_hwmon_pdriver);
8987 if (ret) {
8988 printk(TPACPI_ERR
8989 "unable to register hwmon platform driver\n");
8990 thinkpad_acpi_module_exit();
8991 return ret;
8992 }
8993 tp_features.sensors_pdrv_registered = 1;
8994
8995 ret = tpacpi_create_driver_attributes(&tpacpi_pdriver.driver);
8996 if (!ret) {
8997 tp_features.platform_drv_attrs_registered = 1;
8998 ret = tpacpi_create_driver_attributes(
8999 &tpacpi_hwmon_pdriver.driver);
9000 }
9001 if (ret) {
9002 printk(TPACPI_ERR
9003 "unable to create sysfs driver attributes\n");
9004 thinkpad_acpi_module_exit();
9005 return ret;
9006 }
9007 tp_features.sensors_pdrv_attrs_registered = 1;
9008
9009
9010 /* Device initialization */
9011 tpacpi_pdev = platform_device_register_simple(TPACPI_DRVR_NAME, -1,
9012 NULL, 0);
9013 if (IS_ERR(tpacpi_pdev)) {
9014 ret = PTR_ERR(tpacpi_pdev);
9015 tpacpi_pdev = NULL;
9016 printk(TPACPI_ERR "unable to register platform device\n");
9017 thinkpad_acpi_module_exit();
9018 return ret;
9019 }
9020 tpacpi_sensors_pdev = platform_device_register_simple(
9021 TPACPI_HWMON_DRVR_NAME,
9022 -1, NULL, 0);
9023 if (IS_ERR(tpacpi_sensors_pdev)) {
9024 ret = PTR_ERR(tpacpi_sensors_pdev);
9025 tpacpi_sensors_pdev = NULL;
9026 printk(TPACPI_ERR
9027 "unable to register hwmon platform device\n");
9028 thinkpad_acpi_module_exit();
9029 return ret;
9030 }
9031 ret = device_create_file(&tpacpi_sensors_pdev->dev,
9032 &dev_attr_thinkpad_acpi_pdev_name);
9033 if (ret) {
9034 printk(TPACPI_ERR
9035 "unable to create sysfs hwmon device attributes\n");
9036 thinkpad_acpi_module_exit();
9037 return ret;
9038 }
9039 tp_features.sensors_pdev_attrs_registered = 1;
9040 tpacpi_hwmon = hwmon_device_register(&tpacpi_sensors_pdev->dev);
9041 if (IS_ERR(tpacpi_hwmon)) {
9042 ret = PTR_ERR(tpacpi_hwmon);
9043 tpacpi_hwmon = NULL;
9044 printk(TPACPI_ERR "unable to register hwmon device\n");
9045 thinkpad_acpi_module_exit();
9046 return ret;
9047 }
9048 mutex_init(&tpacpi_inputdev_send_mutex);
9049 tpacpi_inputdev = input_allocate_device();
9050 if (!tpacpi_inputdev) {
9051 printk(TPACPI_ERR "unable to allocate input device\n");
9052 thinkpad_acpi_module_exit();
9053 return -ENOMEM;
9054 } else {
9055 /* Prepare input device, but don't register */
9056 tpacpi_inputdev->name = "ThinkPad Extra Buttons";
9057 tpacpi_inputdev->phys = TPACPI_DRVR_NAME "/input0";
9058 tpacpi_inputdev->id.bustype = BUS_HOST;
9059 tpacpi_inputdev->id.vendor = (thinkpad_id.vendor) ?
9060 thinkpad_id.vendor :
9061 PCI_VENDOR_ID_IBM;
9062 tpacpi_inputdev->id.product = TPACPI_HKEY_INPUT_PRODUCT;
9063 tpacpi_inputdev->id.version = TPACPI_HKEY_INPUT_VERSION;
9064 tpacpi_inputdev->dev.parent = &tpacpi_pdev->dev;
9065 }
9066 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
9067 ret = ibm_init(&ibms_init[i]);
9068 if (ret >= 0 && *ibms_init[i].param)
9069 ret = ibms_init[i].data->write(ibms_init[i].param);
9070 if (ret < 0) {
9071 thinkpad_acpi_module_exit();
9072 return ret;
9073 }
9074 }
9075
9076 tpacpi_lifecycle = TPACPI_LIFE_RUNNING;
9077
9078 ret = input_register_device(tpacpi_inputdev);
9079 if (ret < 0) {
9080 printk(TPACPI_ERR "unable to register input device\n");
9081 thinkpad_acpi_module_exit();
9082 return ret;
9083 } else {
9084 tp_features.input_device_registered = 1;
9085 }
9086
9087 return 0;
9088 }
9089
9090 MODULE_ALIAS(TPACPI_DRVR_SHORTNAME);
9091
9092 /*
9093 * This will autoload the driver in almost every ThinkPad
9094 * in widespread use.
9095 *
9096 * Only _VERY_ old models, like the 240, 240x and 570 lack
9097 * the HKEY event interface.
9098 */
9099 MODULE_DEVICE_TABLE(acpi, ibm_htk_device_ids);
9100
9101 /*
9102 * DMI matching for module autoloading
9103 *
9104 * See http://thinkwiki.org/wiki/List_of_DMI_IDs
9105 * See http://thinkwiki.org/wiki/BIOS_Upgrade_Downloads
9106 *
9107 * Only models listed in thinkwiki will be supported, so add yours
9108 * if it is not there yet.
9109 */
9110 #define IBM_BIOS_MODULE_ALIAS(__type) \
9111 MODULE_ALIAS("dmi:bvnIBM:bvr" __type "ET??WW*")
9112
9113 /* Ancient thinkpad BIOSes have to be identified by
9114 * BIOS type or model number, and there are far less
9115 * BIOS types than model numbers... */
9116 IBM_BIOS_MODULE_ALIAS("I[MU]"); /* 570, 570e */
9117
9118 MODULE_AUTHOR("Borislav Deianov <borislav@users.sf.net>");
9119 MODULE_AUTHOR("Henrique de Moraes Holschuh <hmh@hmh.eng.br>");
9120 MODULE_DESCRIPTION(TPACPI_DESC);
9121 MODULE_VERSION(TPACPI_VERSION);
9122 MODULE_LICENSE("GPL");
9123
9124 module_init(thinkpad_acpi_module_init);
9125 module_exit(thinkpad_acpi_module_exit);
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree