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Staging: netwave: delete the driver
[linux/fpc-iii.git] / drivers / platform / x86 / thinkpad_acpi.c
blob63290b33c8796e203113309536ed8716a42ef1f7
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 #include <linux/slab.h>
62
63 #include <linux/nvram.h>
64 #include <linux/proc_fs.h>
65 #include <linux/seq_file.h>
66 #include <linux/sysfs.h>
67 #include <linux/backlight.h>
68 #include <linux/fb.h>
69 #include <linux/platform_device.h>
70 #include <linux/hwmon.h>
71 #include <linux/hwmon-sysfs.h>
72 #include <linux/input.h>
73 #include <linux/leds.h>
74 #include <linux/rfkill.h>
75 #include <asm/uaccess.h>
76
77 #include <linux/dmi.h>
78 #include <linux/jiffies.h>
79 #include <linux/workqueue.h>
80
81 #include <sound/core.h>
82 #include <sound/control.h>
83 #include <sound/initval.h>
84
85 #include <acpi/acpi_drivers.h>
86
87 #include <linux/pci_ids.h>
88
89
90 /* ThinkPad CMOS commands */
91 #define TP_CMOS_VOLUME_DOWN 0
92 #define TP_CMOS_VOLUME_UP 1
93 #define TP_CMOS_VOLUME_MUTE 2
94 #define TP_CMOS_BRIGHTNESS_UP 4
95 #define TP_CMOS_BRIGHTNESS_DOWN 5
96 #define TP_CMOS_THINKLIGHT_ON 12
97 #define TP_CMOS_THINKLIGHT_OFF 13
98
99 /* NVRAM Addresses */
100 enum tp_nvram_addr {
101 TP_NVRAM_ADDR_HK2 = 0x57,
102 TP_NVRAM_ADDR_THINKLIGHT = 0x58,
103 TP_NVRAM_ADDR_VIDEO = 0x59,
104 TP_NVRAM_ADDR_BRIGHTNESS = 0x5e,
105 TP_NVRAM_ADDR_MIXER = 0x60,
106 };
107
108 /* NVRAM bit masks */
109 enum {
110 TP_NVRAM_MASK_HKT_THINKPAD = 0x08,
111 TP_NVRAM_MASK_HKT_ZOOM = 0x20,
112 TP_NVRAM_MASK_HKT_DISPLAY = 0x40,
113 TP_NVRAM_MASK_HKT_HIBERNATE = 0x80,
114 TP_NVRAM_MASK_THINKLIGHT = 0x10,
115 TP_NVRAM_MASK_HKT_DISPEXPND = 0x30,
116 TP_NVRAM_MASK_HKT_BRIGHTNESS = 0x20,
117 TP_NVRAM_MASK_LEVEL_BRIGHTNESS = 0x0f,
118 TP_NVRAM_POS_LEVEL_BRIGHTNESS = 0,
119 TP_NVRAM_MASK_MUTE = 0x40,
120 TP_NVRAM_MASK_HKT_VOLUME = 0x80,
121 TP_NVRAM_MASK_LEVEL_VOLUME = 0x0f,
122 TP_NVRAM_POS_LEVEL_VOLUME = 0,
123 };
124
125 /* ACPI HIDs */
126 #define TPACPI_ACPI_HKEY_HID "IBM0068"
127
128 /* Input IDs */
129 #define TPACPI_HKEY_INPUT_PRODUCT 0x5054 /* "TP" */
130 #define TPACPI_HKEY_INPUT_VERSION 0x4101
131
132 /* ACPI \WGSV commands */
133 enum {
134 TP_ACPI_WGSV_GET_STATE = 0x01, /* Get state information */
135 TP_ACPI_WGSV_PWR_ON_ON_RESUME = 0x02, /* Resume WWAN powered on */
136 TP_ACPI_WGSV_PWR_OFF_ON_RESUME = 0x03, /* Resume WWAN powered off */
137 TP_ACPI_WGSV_SAVE_STATE = 0x04, /* Save state for S4/S5 */
138 };
139
140 /* TP_ACPI_WGSV_GET_STATE bits */
141 enum {
142 TP_ACPI_WGSV_STATE_WWANEXIST = 0x0001, /* WWAN hw available */
143 TP_ACPI_WGSV_STATE_WWANPWR = 0x0002, /* WWAN radio enabled */
144 TP_ACPI_WGSV_STATE_WWANPWRRES = 0x0004, /* WWAN state at resume */
145 TP_ACPI_WGSV_STATE_WWANBIOSOFF = 0x0008, /* WWAN disabled in BIOS */
146 TP_ACPI_WGSV_STATE_BLTHEXIST = 0x0001, /* BLTH hw available */
147 TP_ACPI_WGSV_STATE_BLTHPWR = 0x0002, /* BLTH radio enabled */
148 TP_ACPI_WGSV_STATE_BLTHPWRRES = 0x0004, /* BLTH state at resume */
149 TP_ACPI_WGSV_STATE_BLTHBIOSOFF = 0x0008, /* BLTH disabled in BIOS */
150 TP_ACPI_WGSV_STATE_UWBEXIST = 0x0010, /* UWB hw available */
151 TP_ACPI_WGSV_STATE_UWBPWR = 0x0020, /* UWB radio enabled */
152 };
153
154 /* HKEY events */
155 enum tpacpi_hkey_event_t {
156 /* Hotkey-related */
157 TP_HKEY_EV_HOTKEY_BASE = 0x1001, /* first hotkey (FN+F1) */
158 TP_HKEY_EV_BRGHT_UP = 0x1010, /* Brightness up */
159 TP_HKEY_EV_BRGHT_DOWN = 0x1011, /* Brightness down */
160 TP_HKEY_EV_VOL_UP = 0x1015, /* Volume up or unmute */
161 TP_HKEY_EV_VOL_DOWN = 0x1016, /* Volume down or unmute */
162 TP_HKEY_EV_VOL_MUTE = 0x1017, /* Mixer output mute */
163
164 /* Reasons for waking up from S3/S4 */
165 TP_HKEY_EV_WKUP_S3_UNDOCK = 0x2304, /* undock requested, S3 */
166 TP_HKEY_EV_WKUP_S4_UNDOCK = 0x2404, /* undock requested, S4 */
167 TP_HKEY_EV_WKUP_S3_BAYEJ = 0x2305, /* bay ejection req, S3 */
168 TP_HKEY_EV_WKUP_S4_BAYEJ = 0x2405, /* bay ejection req, S4 */
169 TP_HKEY_EV_WKUP_S3_BATLOW = 0x2313, /* battery empty, S3 */
170 TP_HKEY_EV_WKUP_S4_BATLOW = 0x2413, /* battery empty, S4 */
171
172 /* Auto-sleep after eject request */
173 TP_HKEY_EV_BAYEJ_ACK = 0x3003, /* bay ejection complete */
174 TP_HKEY_EV_UNDOCK_ACK = 0x4003, /* undock complete */
175
176 /* Misc bay events */
177 TP_HKEY_EV_OPTDRV_EJ = 0x3006, /* opt. drive tray ejected */
178
179 /* User-interface events */
180 TP_HKEY_EV_LID_CLOSE = 0x5001, /* laptop lid closed */
181 TP_HKEY_EV_LID_OPEN = 0x5002, /* laptop lid opened */
182 TP_HKEY_EV_TABLET_TABLET = 0x5009, /* tablet swivel up */
183 TP_HKEY_EV_TABLET_NOTEBOOK = 0x500a, /* tablet swivel down */
184 TP_HKEY_EV_PEN_INSERTED = 0x500b, /* tablet pen inserted */
185 TP_HKEY_EV_PEN_REMOVED = 0x500c, /* tablet pen removed */
186 TP_HKEY_EV_BRGHT_CHANGED = 0x5010, /* backlight control event */
187
188 /* Thermal events */
189 TP_HKEY_EV_ALARM_BAT_HOT = 0x6011, /* battery too hot */
190 TP_HKEY_EV_ALARM_BAT_XHOT = 0x6012, /* battery critically hot */
191 TP_HKEY_EV_ALARM_SENSOR_HOT = 0x6021, /* sensor too hot */
192 TP_HKEY_EV_ALARM_SENSOR_XHOT = 0x6022, /* sensor critically hot */
193 TP_HKEY_EV_THM_TABLE_CHANGED = 0x6030, /* thermal table changed */
194
195 /* Misc */
196 TP_HKEY_EV_RFKILL_CHANGED = 0x7000, /* rfkill switch changed */
197 };
198
199 /****************************************************************************
200 * Main driver
201 */
202
203 #define TPACPI_NAME "thinkpad"
204 #define TPACPI_DESC "ThinkPad ACPI Extras"
205 #define TPACPI_FILE TPACPI_NAME "_acpi"
206 #define TPACPI_URL "http://ibm-acpi.sf.net/"
207 #define TPACPI_MAIL "ibm-acpi-devel@lists.sourceforge.net"
208
209 #define TPACPI_PROC_DIR "ibm"
210 #define TPACPI_ACPI_EVENT_PREFIX "ibm"
211 #define TPACPI_DRVR_NAME TPACPI_FILE
212 #define TPACPI_DRVR_SHORTNAME "tpacpi"
213 #define TPACPI_HWMON_DRVR_NAME TPACPI_NAME "_hwmon"
214
215 #define TPACPI_NVRAM_KTHREAD_NAME "ktpacpi_nvramd"
216 #define TPACPI_WORKQUEUE_NAME "ktpacpid"
217
218 #define TPACPI_MAX_ACPI_ARGS 3
219
220 /* printk headers */
221 #define TPACPI_LOG TPACPI_FILE ": "
222 #define TPACPI_EMERG KERN_EMERG TPACPI_LOG
223 #define TPACPI_ALERT KERN_ALERT TPACPI_LOG
224 #define TPACPI_CRIT KERN_CRIT TPACPI_LOG
225 #define TPACPI_ERR KERN_ERR TPACPI_LOG
226 #define TPACPI_WARN KERN_WARNING TPACPI_LOG
227 #define TPACPI_NOTICE KERN_NOTICE TPACPI_LOG
228 #define TPACPI_INFO KERN_INFO TPACPI_LOG
229 #define TPACPI_DEBUG KERN_DEBUG TPACPI_LOG
230
231 /* Debugging printk groups */
232 #define TPACPI_DBG_ALL 0xffff
233 #define TPACPI_DBG_DISCLOSETASK 0x8000
234 #define TPACPI_DBG_INIT 0x0001
235 #define TPACPI_DBG_EXIT 0x0002
236 #define TPACPI_DBG_RFKILL 0x0004
237 #define TPACPI_DBG_HKEY 0x0008
238 #define TPACPI_DBG_FAN 0x0010
239 #define TPACPI_DBG_BRGHT 0x0020
240 #define TPACPI_DBG_MIXER 0x0040
241
242 #define onoff(status, bit) ((status) & (1 << (bit)) ? "on" : "off")
243 #define enabled(status, bit) ((status) & (1 << (bit)) ? "enabled" : "disabled")
244 #define strlencmp(a, b) (strncmp((a), (b), strlen(b)))
245
246
247 /****************************************************************************
248 * Driver-wide structs and misc. variables
249 */
250
251 struct ibm_struct;
252
253 struct tp_acpi_drv_struct {
254 const struct acpi_device_id *hid;
255 struct acpi_driver *driver;
256
257 void (*notify) (struct ibm_struct *, u32);
258 acpi_handle *handle;
259 u32 type;
260 struct acpi_device *device;
261 };
262
263 struct ibm_struct {
264 char *name;
265
266 int (*read) (struct seq_file *);
267 int (*write) (char *);
268 void (*exit) (void);
269 void (*resume) (void);
270 void (*suspend) (pm_message_t state);
271 void (*shutdown) (void);
272
273 struct list_head all_drivers;
274
275 struct tp_acpi_drv_struct *acpi;
276
277 struct {
278 u8 acpi_driver_registered:1;
279 u8 acpi_notify_installed:1;
280 u8 proc_created:1;
281 u8 init_called:1;
282 u8 experimental:1;
283 } flags;
284 };
285
286 struct ibm_init_struct {
287 char param[32];
288
289 int (*init) (struct ibm_init_struct *);
290 mode_t base_procfs_mode;
291 struct ibm_struct *data;
292 };
293
294 static struct {
295 u32 bluetooth:1;
296 u32 hotkey:1;
297 u32 hotkey_mask:1;
298 u32 hotkey_wlsw:1;
299 u32 hotkey_tablet:1;
300 u32 light:1;
301 u32 light_status:1;
302 u32 bright_16levels:1;
303 u32 bright_acpimode:1;
304 u32 wan:1;
305 u32 uwb:1;
306 u32 fan_ctrl_status_undef:1;
307 u32 second_fan:1;
308 u32 beep_needs_two_args:1;
309 u32 mixer_no_level_control:1;
310 u32 input_device_registered:1;
311 u32 platform_drv_registered:1;
312 u32 platform_drv_attrs_registered:1;
313 u32 sensors_pdrv_registered:1;
314 u32 sensors_pdrv_attrs_registered:1;
315 u32 sensors_pdev_attrs_registered:1;
316 u32 hotkey_poll_active:1;
317 } tp_features;
318
319 static struct {
320 u16 hotkey_mask_ff:1;
321 u16 volume_ctrl_forbidden:1;
322 } tp_warned;
323
324 struct thinkpad_id_data {
325 unsigned int vendor; /* ThinkPad vendor:
326 * PCI_VENDOR_ID_IBM/PCI_VENDOR_ID_LENOVO */
327
328 char *bios_version_str; /* Something like 1ZET51WW (1.03z) */
329 char *ec_version_str; /* Something like 1ZHT51WW-1.04a */
330
331 u16 bios_model; /* 1Y = 0x5931, 0 = unknown */
332 u16 ec_model;
333 u16 bios_release; /* 1ZETK1WW = 0x314b, 0 = unknown */
334 u16 ec_release;
335
336 char *model_str; /* ThinkPad T43 */
337 char *nummodel_str; /* 9384A9C for a 9384-A9C model */
338 };
339 static struct thinkpad_id_data thinkpad_id;
340
341 static enum {
342 TPACPI_LIFE_INIT = 0,
343 TPACPI_LIFE_RUNNING,
344 TPACPI_LIFE_EXITING,
345 } tpacpi_lifecycle;
346
347 static int experimental;
348 static u32 dbg_level;
349
350 static struct workqueue_struct *tpacpi_wq;
351
352 enum led_status_t {
353 TPACPI_LED_OFF = 0,
354 TPACPI_LED_ON,
355 TPACPI_LED_BLINK,
356 };
357
358 /* Special LED class that can defer work */
359 struct tpacpi_led_classdev {
360 struct led_classdev led_classdev;
361 struct work_struct work;
362 enum led_status_t new_state;
363 unsigned int led;
364 };
365
366 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
367 static int dbg_wlswemul;
368 static int tpacpi_wlsw_emulstate;
369 static int dbg_bluetoothemul;
370 static int tpacpi_bluetooth_emulstate;
371 static int dbg_wwanemul;
372 static int tpacpi_wwan_emulstate;
373 static int dbg_uwbemul;
374 static int tpacpi_uwb_emulstate;
375 #endif
376
377
378 /*************************************************************************
379 * Debugging helpers
380 */
381
382 #define dbg_printk(a_dbg_level, format, arg...) \
383 do { if (dbg_level & (a_dbg_level)) \
384 printk(TPACPI_DEBUG "%s: " format, __func__ , ## arg); \
385 } while (0)
386
387 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
388 #define vdbg_printk dbg_printk
389 static const char *str_supported(int is_supported);
390 #else
391 #define vdbg_printk(a_dbg_level, format, arg...) \
392 do { } while (0)
393 #endif
394
395 static void tpacpi_log_usertask(const char * const what)
396 {
397 printk(TPACPI_DEBUG "%s: access by process with PID %d\n",
398 what, task_tgid_vnr(current));
399 }
400
401 #define tpacpi_disclose_usertask(what, format, arg...) \
402 do { \
403 if (unlikely( \
404 (dbg_level & TPACPI_DBG_DISCLOSETASK) && \
405 (tpacpi_lifecycle == TPACPI_LIFE_RUNNING))) { \
406 printk(TPACPI_DEBUG "%s: PID %d: " format, \
407 what, task_tgid_vnr(current), ## arg); \
408 } \
409 } while (0)
410
411 /*
412 * Quirk handling helpers
413 *
414 * ThinkPad IDs and versions seen in the field so far
415 * are two-characters from the set [0-9A-Z], i.e. base 36.
416 *
417 * We use values well outside that range as specials.
418 */
419
420 #define TPACPI_MATCH_ANY 0xffffU
421 #define TPACPI_MATCH_UNKNOWN 0U
422
423 /* TPID('1', 'Y') == 0x5931 */
424 #define TPID(__c1, __c2) (((__c2) << 8) | (__c1))
425
426 #define TPACPI_Q_IBM(__id1, __id2, __quirk) \
427 { .vendor = PCI_VENDOR_ID_IBM, \
428 .bios = TPID(__id1, __id2), \
429 .ec = TPACPI_MATCH_ANY, \
430 .quirks = (__quirk) }
431
432 #define TPACPI_Q_LNV(__id1, __id2, __quirk) \
433 { .vendor = PCI_VENDOR_ID_LENOVO, \
434 .bios = TPID(__id1, __id2), \
435 .ec = TPACPI_MATCH_ANY, \
436 .quirks = (__quirk) }
437
438 #define TPACPI_QEC_LNV(__id1, __id2, __quirk) \
439 { .vendor = PCI_VENDOR_ID_LENOVO, \
440 .bios = TPACPI_MATCH_ANY, \
441 .ec = TPID(__id1, __id2), \
442 .quirks = (__quirk) }
443
444 struct tpacpi_quirk {
445 unsigned int vendor;
446 u16 bios;
447 u16 ec;
448 unsigned long quirks;
449 };
450
451 /**
452 * tpacpi_check_quirks() - search BIOS/EC version on a list
453 * @qlist: array of &struct tpacpi_quirk
454 * @qlist_size: number of elements in @qlist
455 *
456 * Iterates over a quirks list until one is found that matches the
457 * ThinkPad's vendor, BIOS and EC model.
458 *
459 * Returns 0 if nothing matches, otherwise returns the quirks field of
460 * the matching &struct tpacpi_quirk entry.
461 *
462 * The match criteria is: vendor, ec and bios much match.
463 */
464 static unsigned long __init tpacpi_check_quirks(
465 const struct tpacpi_quirk *qlist,
466 unsigned int qlist_size)
467 {
468 while (qlist_size) {
469 if ((qlist->vendor == thinkpad_id.vendor ||
470 qlist->vendor == TPACPI_MATCH_ANY) &&
471 (qlist->bios == thinkpad_id.bios_model ||
472 qlist->bios == TPACPI_MATCH_ANY) &&
473 (qlist->ec == thinkpad_id.ec_model ||
474 qlist->ec == TPACPI_MATCH_ANY))
475 return qlist->quirks;
476
477 qlist_size--;
478 qlist++;
479 }
480 return 0;
481 }
482
483
484 /****************************************************************************
485 ****************************************************************************
486 *
487 * ACPI Helpers and device model
488 *
489 ****************************************************************************
490 ****************************************************************************/
491
492 /*************************************************************************
493 * ACPI basic handles
494 */
495
496 static acpi_handle root_handle;
497
498 #define TPACPI_HANDLE(object, parent, paths...) \
499 static acpi_handle object##_handle; \
500 static acpi_handle *object##_parent = &parent##_handle; \
501 static char *object##_path; \
502 static char *object##_paths[] = { paths }
503
504 TPACPI_HANDLE(ec, root, "\\_SB.PCI0.ISA.EC0", /* 240, 240x */
505 "\\_SB.PCI.ISA.EC", /* 570 */
506 "\\_SB.PCI0.ISA0.EC0", /* 600e/x, 770e, 770x */
507 "\\_SB.PCI0.ISA.EC", /* A21e, A2xm/p, T20-22, X20-21 */
508 "\\_SB.PCI0.AD4S.EC0", /* i1400, R30 */
509 "\\_SB.PCI0.ICH3.EC0", /* R31 */
510 "\\_SB.PCI0.LPC.EC", /* all others */
511 );
512
513 TPACPI_HANDLE(ecrd, ec, "ECRD"); /* 570 */
514 TPACPI_HANDLE(ecwr, ec, "ECWR"); /* 570 */
515
516 TPACPI_HANDLE(cmos, root, "\\UCMS", /* R50, R50e, R50p, R51, */
517 /* T4x, X31, X40 */
518 "\\CMOS", /* A3x, G4x, R32, T23, T30, X22-24, X30 */
519 "\\CMS", /* R40, R40e */
520 ); /* all others */
521
522 TPACPI_HANDLE(hkey, ec, "\\_SB.HKEY", /* 600e/x, 770e, 770x */
523 "^HKEY", /* R30, R31 */
524 "HKEY", /* all others */
525 ); /* 570 */
526
527 TPACPI_HANDLE(vid, root, "\\_SB.PCI.AGP.VGA", /* 570 */
528 "\\_SB.PCI0.AGP0.VID0", /* 600e/x, 770x */
529 "\\_SB.PCI0.VID0", /* 770e */
530 "\\_SB.PCI0.VID", /* A21e, G4x, R50e, X30, X40 */
531 "\\_SB.PCI0.AGP.VID", /* all others */
532 ); /* R30, R31 */
533
534
535 /*************************************************************************
536 * ACPI helpers
537 */
538
539 static int acpi_evalf(acpi_handle handle,
540 void *res, char *method, char *fmt, ...)
541 {
542 char *fmt0 = fmt;
543 struct acpi_object_list params;
544 union acpi_object in_objs[TPACPI_MAX_ACPI_ARGS];
545 struct acpi_buffer result, *resultp;
546 union acpi_object out_obj;
547 acpi_status status;
548 va_list ap;
549 char res_type;
550 int success;
551 int quiet;
552
553 if (!*fmt) {
554 printk(TPACPI_ERR "acpi_evalf() called with empty format\n");
555 return 0;
556 }
557
558 if (*fmt == 'q') {
559 quiet = 1;
560 fmt++;
561 } else
562 quiet = 0;
563
564 res_type = *(fmt++);
565
566 params.count = 0;
567 params.pointer = &in_objs[0];
568
569 va_start(ap, fmt);
570 while (*fmt) {
571 char c = *(fmt++);
572 switch (c) {
573 case 'd': /* int */
574 in_objs[params.count].integer.value = va_arg(ap, int);
575 in_objs[params.count++].type = ACPI_TYPE_INTEGER;
576 break;
577 /* add more types as needed */
578 default:
579 printk(TPACPI_ERR "acpi_evalf() called "
580 "with invalid format character '%c'\n", c);
581 return 0;
582 }
583 }
584 va_end(ap);
585
586 if (res_type != 'v') {
587 result.length = sizeof(out_obj);
588 result.pointer = &out_obj;
589 resultp = &result;
590 } else
591 resultp = NULL;
592
593 status = acpi_evaluate_object(handle, method, &params, resultp);
594
595 switch (res_type) {
596 case 'd': /* int */
597 if (res)
598 *(int *)res = out_obj.integer.value;
599 success = status == AE_OK && out_obj.type == ACPI_TYPE_INTEGER;
600 break;
601 case 'v': /* void */
602 success = status == AE_OK;
603 break;
604 /* add more types as needed */
605 default:
606 printk(TPACPI_ERR "acpi_evalf() called "
607 "with invalid format character '%c'\n", res_type);
608 return 0;
609 }
610
611 if (!success && !quiet)
612 printk(TPACPI_ERR "acpi_evalf(%s, %s, ...) failed: %d\n",
613 method, fmt0, status);
614
615 return success;
616 }
617
618 static int acpi_ec_read(int i, u8 *p)
619 {
620 int v;
621
622 if (ecrd_handle) {
623 if (!acpi_evalf(ecrd_handle, &v, NULL, "dd", i))
624 return 0;
625 *p = v;
626 } else {
627 if (ec_read(i, p) < 0)
628 return 0;
629 }
630
631 return 1;
632 }
633
634 static int acpi_ec_write(int i, u8 v)
635 {
636 if (ecwr_handle) {
637 if (!acpi_evalf(ecwr_handle, NULL, NULL, "vdd", i, v))
638 return 0;
639 } else {
640 if (ec_write(i, v) < 0)
641 return 0;
642 }
643
644 return 1;
645 }
646
647 static int issue_thinkpad_cmos_command(int cmos_cmd)
648 {
649 if (!cmos_handle)
650 return -ENXIO;
651
652 if (!acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd))
653 return -EIO;
654
655 return 0;
656 }
657
658 /*************************************************************************
659 * ACPI device model
660 */
661
662 #define TPACPI_ACPIHANDLE_INIT(object) \
663 drv_acpi_handle_init(#object, &object##_handle, *object##_parent, \
664 object##_paths, ARRAY_SIZE(object##_paths), &object##_path)
665
666 static void drv_acpi_handle_init(char *name,
667 acpi_handle *handle, acpi_handle parent,
668 char **paths, int num_paths, char **path)
669 {
670 int i;
671 acpi_status status;
672
673 vdbg_printk(TPACPI_DBG_INIT, "trying to locate ACPI handle for %s\n",
674 name);
675
676 for (i = 0; i < num_paths; i++) {
677 status = acpi_get_handle(parent, paths[i], handle);
678 if (ACPI_SUCCESS(status)) {
679 *path = paths[i];
680 dbg_printk(TPACPI_DBG_INIT,
681 "Found ACPI handle %s for %s\n",
682 *path, name);
683 return;
684 }
685 }
686
687 vdbg_printk(TPACPI_DBG_INIT, "ACPI handle for %s not found\n",
688 name);
689 *handle = NULL;
690 }
691
692 static void dispatch_acpi_notify(acpi_handle handle, u32 event, void *data)
693 {
694 struct ibm_struct *ibm = data;
695
696 if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
697 return;
698
699 if (!ibm || !ibm->acpi || !ibm->acpi->notify)
700 return;
701
702 ibm->acpi->notify(ibm, event);
703 }
704
705 static int __init setup_acpi_notify(struct ibm_struct *ibm)
706 {
707 acpi_status status;
708 int rc;
709
710 BUG_ON(!ibm->acpi);
711
712 if (!*ibm->acpi->handle)
713 return 0;
714
715 vdbg_printk(TPACPI_DBG_INIT,
716 "setting up ACPI notify for %s\n", ibm->name);
717
718 rc = acpi_bus_get_device(*ibm->acpi->handle, &ibm->acpi->device);
719 if (rc < 0) {
720 printk(TPACPI_ERR "acpi_bus_get_device(%s) failed: %d\n",
721 ibm->name, rc);
722 return -ENODEV;
723 }
724
725 ibm->acpi->device->driver_data = ibm;
726 sprintf(acpi_device_class(ibm->acpi->device), "%s/%s",
727 TPACPI_ACPI_EVENT_PREFIX,
728 ibm->name);
729
730 status = acpi_install_notify_handler(*ibm->acpi->handle,
731 ibm->acpi->type, dispatch_acpi_notify, ibm);
732 if (ACPI_FAILURE(status)) {
733 if (status == AE_ALREADY_EXISTS) {
734 printk(TPACPI_NOTICE
735 "another device driver is already "
736 "handling %s events\n", ibm->name);
737 } else {
738 printk(TPACPI_ERR
739 "acpi_install_notify_handler(%s) failed: %d\n",
740 ibm->name, status);
741 }
742 return -ENODEV;
743 }
744 ibm->flags.acpi_notify_installed = 1;
745 return 0;
746 }
747
748 static int __init tpacpi_device_add(struct acpi_device *device)
749 {
750 return 0;
751 }
752
753 static int __init register_tpacpi_subdriver(struct ibm_struct *ibm)
754 {
755 int rc;
756
757 dbg_printk(TPACPI_DBG_INIT,
758 "registering %s as an ACPI driver\n", ibm->name);
759
760 BUG_ON(!ibm->acpi);
761
762 ibm->acpi->driver = kzalloc(sizeof(struct acpi_driver), GFP_KERNEL);
763 if (!ibm->acpi->driver) {
764 printk(TPACPI_ERR
765 "failed to allocate memory for ibm->acpi->driver\n");
766 return -ENOMEM;
767 }
768
769 sprintf(ibm->acpi->driver->name, "%s_%s", TPACPI_NAME, ibm->name);
770 ibm->acpi->driver->ids = ibm->acpi->hid;
771
772 ibm->acpi->driver->ops.add = &tpacpi_device_add;
773
774 rc = acpi_bus_register_driver(ibm->acpi->driver);
775 if (rc < 0) {
776 printk(TPACPI_ERR "acpi_bus_register_driver(%s) failed: %d\n",
777 ibm->name, rc);
778 kfree(ibm->acpi->driver);
779 ibm->acpi->driver = NULL;
780 } else if (!rc)
781 ibm->flags.acpi_driver_registered = 1;
782
783 return rc;
784 }
785
786
787 /****************************************************************************
788 ****************************************************************************
789 *
790 * Procfs Helpers
791 *
792 ****************************************************************************
793 ****************************************************************************/
794
795 static int dispatch_proc_show(struct seq_file *m, void *v)
796 {
797 struct ibm_struct *ibm = m->private;
798
799 if (!ibm || !ibm->read)
800 return -EINVAL;
801 return ibm->read(m);
802 }
803
804 static int dispatch_proc_open(struct inode *inode, struct file *file)
805 {
806 return single_open(file, dispatch_proc_show, PDE(inode)->data);
807 }
808
809 static ssize_t dispatch_proc_write(struct file *file,
810 const char __user *userbuf,
811 size_t count, loff_t *pos)
812 {
813 struct ibm_struct *ibm = PDE(file->f_path.dentry->d_inode)->data;
814 char *kernbuf;
815 int ret;
816
817 if (!ibm || !ibm->write)
818 return -EINVAL;
819 if (count > PAGE_SIZE - 2)
820 return -EINVAL;
821
822 kernbuf = kmalloc(count + 2, GFP_KERNEL);
823 if (!kernbuf)
824 return -ENOMEM;
825
826 if (copy_from_user(kernbuf, userbuf, count)) {
827 kfree(kernbuf);
828 return -EFAULT;
829 }
830
831 kernbuf[count] = 0;
832 strcat(kernbuf, ",");
833 ret = ibm->write(kernbuf);
834 if (ret == 0)
835 ret = count;
836
837 kfree(kernbuf);
838
839 return ret;
840 }
841
842 static const struct file_operations dispatch_proc_fops = {
843 .owner = THIS_MODULE,
844 .open = dispatch_proc_open,
845 .read = seq_read,
846 .llseek = seq_lseek,
847 .release = single_release,
848 .write = dispatch_proc_write,
849 };
850
851 static char *next_cmd(char **cmds)
852 {
853 char *start = *cmds;
854 char *end;
855
856 while ((end = strchr(start, ',')) && end == start)
857 start = end + 1;
858
859 if (!end)
860 return NULL;
861
862 *end = 0;
863 *cmds = end + 1;
864 return start;
865 }
866
867
868 /****************************************************************************
869 ****************************************************************************
870 *
871 * Device model: input, hwmon and platform
872 *
873 ****************************************************************************
874 ****************************************************************************/
875
876 static struct platform_device *tpacpi_pdev;
877 static struct platform_device *tpacpi_sensors_pdev;
878 static struct device *tpacpi_hwmon;
879 static struct input_dev *tpacpi_inputdev;
880 static struct mutex tpacpi_inputdev_send_mutex;
881 static LIST_HEAD(tpacpi_all_drivers);
882
883 static int tpacpi_suspend_handler(struct platform_device *pdev,
884 pm_message_t state)
885 {
886 struct ibm_struct *ibm, *itmp;
887
888 list_for_each_entry_safe(ibm, itmp,
889 &tpacpi_all_drivers,
890 all_drivers) {
891 if (ibm->suspend)
892 (ibm->suspend)(state);
893 }
894
895 return 0;
896 }
897
898 static int tpacpi_resume_handler(struct platform_device *pdev)
899 {
900 struct ibm_struct *ibm, *itmp;
901
902 list_for_each_entry_safe(ibm, itmp,
903 &tpacpi_all_drivers,
904 all_drivers) {
905 if (ibm->resume)
906 (ibm->resume)();
907 }
908
909 return 0;
910 }
911
912 static void tpacpi_shutdown_handler(struct platform_device *pdev)
913 {
914 struct ibm_struct *ibm, *itmp;
915
916 list_for_each_entry_safe(ibm, itmp,
917 &tpacpi_all_drivers,
918 all_drivers) {
919 if (ibm->shutdown)
920 (ibm->shutdown)();
921 }
922 }
923
924 static struct platform_driver tpacpi_pdriver = {
925 .driver = {
926 .name = TPACPI_DRVR_NAME,
927 .owner = THIS_MODULE,
928 },
929 .suspend = tpacpi_suspend_handler,
930 .resume = tpacpi_resume_handler,
931 .shutdown = tpacpi_shutdown_handler,
932 };
933
934 static struct platform_driver tpacpi_hwmon_pdriver = {
935 .driver = {
936 .name = TPACPI_HWMON_DRVR_NAME,
937 .owner = THIS_MODULE,
938 },
939 };
940
941 /*************************************************************************
942 * sysfs support helpers
943 */
944
945 struct attribute_set {
946 unsigned int members, max_members;
947 struct attribute_group group;
948 };
949
950 struct attribute_set_obj {
951 struct attribute_set s;
952 struct attribute *a;
953 } __attribute__((packed));
954
955 static struct attribute_set *create_attr_set(unsigned int max_members,
956 const char *name)
957 {
958 struct attribute_set_obj *sobj;
959
960 if (max_members == 0)
961 return NULL;
962
963 /* Allocates space for implicit NULL at the end too */
964 sobj = kzalloc(sizeof(struct attribute_set_obj) +
965 max_members * sizeof(struct attribute *),
966 GFP_KERNEL);
967 if (!sobj)
968 return NULL;
969 sobj->s.max_members = max_members;
970 sobj->s.group.attrs = &sobj->a;
971 sobj->s.group.name = name;
972
973 return &sobj->s;
974 }
975
976 #define destroy_attr_set(_set) \
977 kfree(_set);
978
979 /* not multi-threaded safe, use it in a single thread per set */
980 static int add_to_attr_set(struct attribute_set *s, struct attribute *attr)
981 {
982 if (!s || !attr)
983 return -EINVAL;
984
985 if (s->members >= s->max_members)
986 return -ENOMEM;
987
988 s->group.attrs[s->members] = attr;
989 s->members++;
990
991 return 0;
992 }
993
994 static int add_many_to_attr_set(struct attribute_set *s,
995 struct attribute **attr,
996 unsigned int count)
997 {
998 int i, res;
999
1000 for (i = 0; i < count; i++) {
1001 res = add_to_attr_set(s, attr[i]);
1002 if (res)
1003 return res;
1004 }
1005
1006 return 0;
1007 }
1008
1009 static void delete_attr_set(struct attribute_set *s, struct kobject *kobj)
1010 {
1011 sysfs_remove_group(kobj, &s->group);
1012 destroy_attr_set(s);
1013 }
1014
1015 #define register_attr_set_with_sysfs(_attr_set, _kobj) \
1016 sysfs_create_group(_kobj, &_attr_set->group)
1017
1018 static int parse_strtoul(const char *buf,
1019 unsigned long max, unsigned long *value)
1020 {
1021 char *endp;
1022
1023 *value = simple_strtoul(skip_spaces(buf), &endp, 0);
1024 endp = skip_spaces(endp);
1025 if (*endp || *value > max)
1026 return -EINVAL;
1027
1028 return 0;
1029 }
1030
1031 static void tpacpi_disable_brightness_delay(void)
1032 {
1033 if (acpi_evalf(hkey_handle, NULL, "PWMS", "qvd", 0))
1034 printk(TPACPI_NOTICE
1035 "ACPI backlight control delay disabled\n");
1036 }
1037
1038 static int __init tpacpi_query_bcl_levels(acpi_handle handle)
1039 {
1040 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
1041 union acpi_object *obj;
1042 int rc;
1043
1044 if (ACPI_SUCCESS(acpi_evaluate_object(handle, NULL, NULL, &buffer))) {
1045 obj = (union acpi_object *)buffer.pointer;
1046 if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) {
1047 printk(TPACPI_ERR "Unknown _BCL data, "
1048 "please report this to %s\n", TPACPI_MAIL);
1049 rc = 0;
1050 } else {
1051 rc = obj->package.count;
1052 }
1053 } else {
1054 return 0;
1055 }
1056
1057 kfree(buffer.pointer);
1058 return rc;
1059 }
1060
1061 static acpi_status __init tpacpi_acpi_walk_find_bcl(acpi_handle handle,
1062 u32 lvl, void *context, void **rv)
1063 {
1064 char name[ACPI_PATH_SEGMENT_LENGTH];
1065 struct acpi_buffer buffer = { sizeof(name), &name };
1066
1067 if (ACPI_SUCCESS(acpi_get_name(handle, ACPI_SINGLE_NAME, &buffer)) &&
1068 !strncmp("_BCL", name, sizeof(name) - 1)) {
1069 BUG_ON(!rv || !*rv);
1070 **(int **)rv = tpacpi_query_bcl_levels(handle);
1071 return AE_CTRL_TERMINATE;
1072 } else {
1073 return AE_OK;
1074 }
1075 }
1076
1077 /*
1078 * Returns 0 (no ACPI _BCL or _BCL invalid), or size of brightness map
1079 */
1080 static int __init tpacpi_check_std_acpi_brightness_support(void)
1081 {
1082 int status;
1083 int bcl_levels = 0;
1084 void *bcl_ptr = &bcl_levels;
1085
1086 if (!vid_handle) {
1087 TPACPI_ACPIHANDLE_INIT(vid);
1088 }
1089 if (!vid_handle)
1090 return 0;
1091
1092 /*
1093 * Search for a _BCL method, and execute it. This is safe on all
1094 * ThinkPads, and as a side-effect, _BCL will place a Lenovo Vista
1095 * BIOS in ACPI backlight control mode. We do NOT have to care
1096 * about calling the _BCL method in an enabled video device, any
1097 * will do for our purposes.
1098 */
1099
1100 status = acpi_walk_namespace(ACPI_TYPE_METHOD, vid_handle, 3,
1101 tpacpi_acpi_walk_find_bcl, NULL, NULL,
1102 &bcl_ptr);
1103
1104 if (ACPI_SUCCESS(status) && bcl_levels > 2) {
1105 tp_features.bright_acpimode = 1;
1106 return (bcl_levels - 2);
1107 }
1108
1109 return 0;
1110 }
1111
1112 static void printk_deprecated_attribute(const char * const what,
1113 const char * const details)
1114 {
1115 tpacpi_log_usertask("deprecated sysfs attribute");
1116 printk(TPACPI_WARN "WARNING: sysfs attribute %s is deprecated and "
1117 "will be removed. %s\n",
1118 what, details);
1119 }
1120
1121 /*************************************************************************
1122 * rfkill and radio control support helpers
1123 */
1124
1125 /*
1126 * ThinkPad-ACPI firmware handling model:
1127 *
1128 * WLSW (master wireless switch) is event-driven, and is common to all
1129 * firmware-controlled radios. It cannot be controlled, just monitored,
1130 * as expected. It overrides all radio state in firmware
1131 *
1132 * The kernel, a masked-off hotkey, and WLSW can change the radio state
1133 * (TODO: verify how WLSW interacts with the returned radio state).
1134 *
1135 * The only time there are shadow radio state changes, is when
1136 * masked-off hotkeys are used.
1137 */
1138
1139 /*
1140 * Internal driver API for radio state:
1141 *
1142 * int: < 0 = error, otherwise enum tpacpi_rfkill_state
1143 * bool: true means radio blocked (off)
1144 */
1145 enum tpacpi_rfkill_state {
1146 TPACPI_RFK_RADIO_OFF = 0,
1147 TPACPI_RFK_RADIO_ON
1148 };
1149
1150 /* rfkill switches */
1151 enum tpacpi_rfk_id {
1152 TPACPI_RFK_BLUETOOTH_SW_ID = 0,
1153 TPACPI_RFK_WWAN_SW_ID,
1154 TPACPI_RFK_UWB_SW_ID,
1155 TPACPI_RFK_SW_MAX
1156 };
1157
1158 static const char *tpacpi_rfkill_names[] = {
1159 [TPACPI_RFK_BLUETOOTH_SW_ID] = "bluetooth",
1160 [TPACPI_RFK_WWAN_SW_ID] = "wwan",
1161 [TPACPI_RFK_UWB_SW_ID] = "uwb",
1162 [TPACPI_RFK_SW_MAX] = NULL
1163 };
1164
1165 /* ThinkPad-ACPI rfkill subdriver */
1166 struct tpacpi_rfk {
1167 struct rfkill *rfkill;
1168 enum tpacpi_rfk_id id;
1169 const struct tpacpi_rfk_ops *ops;
1170 };
1171
1172 struct tpacpi_rfk_ops {
1173 /* firmware interface */
1174 int (*get_status)(void);
1175 int (*set_status)(const enum tpacpi_rfkill_state);
1176 };
1177
1178 static struct tpacpi_rfk *tpacpi_rfkill_switches[TPACPI_RFK_SW_MAX];
1179
1180 /* Query FW and update rfkill sw state for a given rfkill switch */
1181 static int tpacpi_rfk_update_swstate(const struct tpacpi_rfk *tp_rfk)
1182 {
1183 int status;
1184
1185 if (!tp_rfk)
1186 return -ENODEV;
1187
1188 status = (tp_rfk->ops->get_status)();
1189 if (status < 0)
1190 return status;
1191
1192 rfkill_set_sw_state(tp_rfk->rfkill,
1193 (status == TPACPI_RFK_RADIO_OFF));
1194
1195 return status;
1196 }
1197
1198 /* Query FW and update rfkill sw state for all rfkill switches */
1199 static void tpacpi_rfk_update_swstate_all(void)
1200 {
1201 unsigned int i;
1202
1203 for (i = 0; i < TPACPI_RFK_SW_MAX; i++)
1204 tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[i]);
1205 }
1206
1207 /*
1208 * Sync the HW-blocking state of all rfkill switches,
1209 * do notice it causes the rfkill core to schedule uevents
1210 */
1211 static void tpacpi_rfk_update_hwblock_state(bool blocked)
1212 {
1213 unsigned int i;
1214 struct tpacpi_rfk *tp_rfk;
1215
1216 for (i = 0; i < TPACPI_RFK_SW_MAX; i++) {
1217 tp_rfk = tpacpi_rfkill_switches[i];
1218 if (tp_rfk) {
1219 if (rfkill_set_hw_state(tp_rfk->rfkill,
1220 blocked)) {
1221 /* ignore -- we track sw block */
1222 }
1223 }
1224 }
1225 }
1226
1227 /* Call to get the WLSW state from the firmware */
1228 static int hotkey_get_wlsw(void);
1229
1230 /* Call to query WLSW state and update all rfkill switches */
1231 static bool tpacpi_rfk_check_hwblock_state(void)
1232 {
1233 int res = hotkey_get_wlsw();
1234 int hw_blocked;
1235
1236 /* When unknown or unsupported, we have to assume it is unblocked */
1237 if (res < 0)
1238 return false;
1239
1240 hw_blocked = (res == TPACPI_RFK_RADIO_OFF);
1241 tpacpi_rfk_update_hwblock_state(hw_blocked);
1242
1243 return hw_blocked;
1244 }
1245
1246 static int tpacpi_rfk_hook_set_block(void *data, bool blocked)
1247 {
1248 struct tpacpi_rfk *tp_rfk = data;
1249 int res;
1250
1251 dbg_printk(TPACPI_DBG_RFKILL,
1252 "request to change radio state to %s\n",
1253 blocked ? "blocked" : "unblocked");
1254
1255 /* try to set radio state */
1256 res = (tp_rfk->ops->set_status)(blocked ?
1257 TPACPI_RFK_RADIO_OFF : TPACPI_RFK_RADIO_ON);
1258
1259 /* and update the rfkill core with whatever the FW really did */
1260 tpacpi_rfk_update_swstate(tp_rfk);
1261
1262 return (res < 0) ? res : 0;
1263 }
1264
1265 static const struct rfkill_ops tpacpi_rfk_rfkill_ops = {
1266 .set_block = tpacpi_rfk_hook_set_block,
1267 };
1268
1269 static int __init tpacpi_new_rfkill(const enum tpacpi_rfk_id id,
1270 const struct tpacpi_rfk_ops *tp_rfkops,
1271 const enum rfkill_type rfktype,
1272 const char *name,
1273 const bool set_default)
1274 {
1275 struct tpacpi_rfk *atp_rfk;
1276 int res;
1277 bool sw_state = false;
1278 bool hw_state;
1279 int sw_status;
1280
1281 BUG_ON(id >= TPACPI_RFK_SW_MAX || tpacpi_rfkill_switches[id]);
1282
1283 atp_rfk = kzalloc(sizeof(struct tpacpi_rfk), GFP_KERNEL);
1284 if (atp_rfk)
1285 atp_rfk->rfkill = rfkill_alloc(name,
1286 &tpacpi_pdev->dev,
1287 rfktype,
1288 &tpacpi_rfk_rfkill_ops,
1289 atp_rfk);
1290 if (!atp_rfk || !atp_rfk->rfkill) {
1291 printk(TPACPI_ERR
1292 "failed to allocate memory for rfkill class\n");
1293 kfree(atp_rfk);
1294 return -ENOMEM;
1295 }
1296
1297 atp_rfk->id = id;
1298 atp_rfk->ops = tp_rfkops;
1299
1300 sw_status = (tp_rfkops->get_status)();
1301 if (sw_status < 0) {
1302 printk(TPACPI_ERR
1303 "failed to read initial state for %s, error %d\n",
1304 name, sw_status);
1305 } else {
1306 sw_state = (sw_status == TPACPI_RFK_RADIO_OFF);
1307 if (set_default) {
1308 /* try to keep the initial state, since we ask the
1309 * firmware to preserve it across S5 in NVRAM */
1310 rfkill_init_sw_state(atp_rfk->rfkill, sw_state);
1311 }
1312 }
1313 hw_state = tpacpi_rfk_check_hwblock_state();
1314 rfkill_set_hw_state(atp_rfk->rfkill, hw_state);
1315
1316 res = rfkill_register(atp_rfk->rfkill);
1317 if (res < 0) {
1318 printk(TPACPI_ERR
1319 "failed to register %s rfkill switch: %d\n",
1320 name, res);
1321 rfkill_destroy(atp_rfk->rfkill);
1322 kfree(atp_rfk);
1323 return res;
1324 }
1325
1326 tpacpi_rfkill_switches[id] = atp_rfk;
1327
1328 printk(TPACPI_INFO "rfkill switch %s: radio is %sblocked\n",
1329 name, (sw_state || hw_state) ? "" : "un");
1330 return 0;
1331 }
1332
1333 static void tpacpi_destroy_rfkill(const enum tpacpi_rfk_id id)
1334 {
1335 struct tpacpi_rfk *tp_rfk;
1336
1337 BUG_ON(id >= TPACPI_RFK_SW_MAX);
1338
1339 tp_rfk = tpacpi_rfkill_switches[id];
1340 if (tp_rfk) {
1341 rfkill_unregister(tp_rfk->rfkill);
1342 rfkill_destroy(tp_rfk->rfkill);
1343 tpacpi_rfkill_switches[id] = NULL;
1344 kfree(tp_rfk);
1345 }
1346 }
1347
1348 static void printk_deprecated_rfkill_attribute(const char * const what)
1349 {
1350 printk_deprecated_attribute(what,
1351 "Please switch to generic rfkill before year 2010");
1352 }
1353
1354 /* sysfs <radio> enable ------------------------------------------------ */
1355 static ssize_t tpacpi_rfk_sysfs_enable_show(const enum tpacpi_rfk_id id,
1356 struct device_attribute *attr,
1357 char *buf)
1358 {
1359 int status;
1360
1361 printk_deprecated_rfkill_attribute(attr->attr.name);
1362
1363 /* This is in the ABI... */
1364 if (tpacpi_rfk_check_hwblock_state()) {
1365 status = TPACPI_RFK_RADIO_OFF;
1366 } else {
1367 status = tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]);
1368 if (status < 0)
1369 return status;
1370 }
1371
1372 return snprintf(buf, PAGE_SIZE, "%d\n",
1373 (status == TPACPI_RFK_RADIO_ON) ? 1 : 0);
1374 }
1375
1376 static ssize_t tpacpi_rfk_sysfs_enable_store(const enum tpacpi_rfk_id id,
1377 struct device_attribute *attr,
1378 const char *buf, size_t count)
1379 {
1380 unsigned long t;
1381 int res;
1382
1383 printk_deprecated_rfkill_attribute(attr->attr.name);
1384
1385 if (parse_strtoul(buf, 1, &t))
1386 return -EINVAL;
1387
1388 tpacpi_disclose_usertask(attr->attr.name, "set to %ld\n", t);
1389
1390 /* This is in the ABI... */
1391 if (tpacpi_rfk_check_hwblock_state() && !!t)
1392 return -EPERM;
1393
1394 res = tpacpi_rfkill_switches[id]->ops->set_status((!!t) ?
1395 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF);
1396 tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]);
1397
1398 return (res < 0) ? res : count;
1399 }
1400
1401 /* procfs -------------------------------------------------------------- */
1402 static int tpacpi_rfk_procfs_read(const enum tpacpi_rfk_id id, struct seq_file *m)
1403 {
1404 if (id >= TPACPI_RFK_SW_MAX)
1405 seq_printf(m, "status:\t\tnot supported\n");
1406 else {
1407 int status;
1408
1409 /* This is in the ABI... */
1410 if (tpacpi_rfk_check_hwblock_state()) {
1411 status = TPACPI_RFK_RADIO_OFF;
1412 } else {
1413 status = tpacpi_rfk_update_swstate(
1414 tpacpi_rfkill_switches[id]);
1415 if (status < 0)
1416 return status;
1417 }
1418
1419 seq_printf(m, "status:\t\t%s\n",
1420 (status == TPACPI_RFK_RADIO_ON) ?
1421 "enabled" : "disabled");
1422 seq_printf(m, "commands:\tenable, disable\n");
1423 }
1424
1425 return 0;
1426 }
1427
1428 static int tpacpi_rfk_procfs_write(const enum tpacpi_rfk_id id, char *buf)
1429 {
1430 char *cmd;
1431 int status = -1;
1432 int res = 0;
1433
1434 if (id >= TPACPI_RFK_SW_MAX)
1435 return -ENODEV;
1436
1437 while ((cmd = next_cmd(&buf))) {
1438 if (strlencmp(cmd, "enable") == 0)
1439 status = TPACPI_RFK_RADIO_ON;
1440 else if (strlencmp(cmd, "disable") == 0)
1441 status = TPACPI_RFK_RADIO_OFF;
1442 else
1443 return -EINVAL;
1444 }
1445
1446 if (status != -1) {
1447 tpacpi_disclose_usertask("procfs", "attempt to %s %s\n",
1448 (status == TPACPI_RFK_RADIO_ON) ?
1449 "enable" : "disable",
1450 tpacpi_rfkill_names[id]);
1451 res = (tpacpi_rfkill_switches[id]->ops->set_status)(status);
1452 tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]);
1453 }
1454
1455 return res;
1456 }
1457
1458 /*************************************************************************
1459 * thinkpad-acpi driver attributes
1460 */
1461
1462 /* interface_version --------------------------------------------------- */
1463 static ssize_t tpacpi_driver_interface_version_show(
1464 struct device_driver *drv,
1465 char *buf)
1466 {
1467 return snprintf(buf, PAGE_SIZE, "0x%08x\n", TPACPI_SYSFS_VERSION);
1468 }
1469
1470 static DRIVER_ATTR(interface_version, S_IRUGO,
1471 tpacpi_driver_interface_version_show, NULL);
1472
1473 /* debug_level --------------------------------------------------------- */
1474 static ssize_t tpacpi_driver_debug_show(struct device_driver *drv,
1475 char *buf)
1476 {
1477 return snprintf(buf, PAGE_SIZE, "0x%04x\n", dbg_level);
1478 }
1479
1480 static ssize_t tpacpi_driver_debug_store(struct device_driver *drv,
1481 const char *buf, size_t count)
1482 {
1483 unsigned long t;
1484
1485 if (parse_strtoul(buf, 0xffff, &t))
1486 return -EINVAL;
1487
1488 dbg_level = t;
1489
1490 return count;
1491 }
1492
1493 static DRIVER_ATTR(debug_level, S_IWUSR | S_IRUGO,
1494 tpacpi_driver_debug_show, tpacpi_driver_debug_store);
1495
1496 /* version ------------------------------------------------------------- */
1497 static ssize_t tpacpi_driver_version_show(struct device_driver *drv,
1498 char *buf)
1499 {
1500 return snprintf(buf, PAGE_SIZE, "%s v%s\n",
1501 TPACPI_DESC, TPACPI_VERSION);
1502 }
1503
1504 static DRIVER_ATTR(version, S_IRUGO,
1505 tpacpi_driver_version_show, NULL);
1506
1507 /* --------------------------------------------------------------------- */
1508
1509 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
1510
1511 /* wlsw_emulstate ------------------------------------------------------ */
1512 static ssize_t tpacpi_driver_wlsw_emulstate_show(struct device_driver *drv,
1513 char *buf)
1514 {
1515 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_wlsw_emulstate);
1516 }
1517
1518 static ssize_t tpacpi_driver_wlsw_emulstate_store(struct device_driver *drv,
1519 const char *buf, size_t count)
1520 {
1521 unsigned long t;
1522
1523 if (parse_strtoul(buf, 1, &t))
1524 return -EINVAL;
1525
1526 if (tpacpi_wlsw_emulstate != !!t) {
1527 tpacpi_wlsw_emulstate = !!t;
1528 tpacpi_rfk_update_hwblock_state(!t); /* negative logic */
1529 }
1530
1531 return count;
1532 }
1533
1534 static DRIVER_ATTR(wlsw_emulstate, S_IWUSR | S_IRUGO,
1535 tpacpi_driver_wlsw_emulstate_show,
1536 tpacpi_driver_wlsw_emulstate_store);
1537
1538 /* bluetooth_emulstate ------------------------------------------------- */
1539 static ssize_t tpacpi_driver_bluetooth_emulstate_show(
1540 struct device_driver *drv,
1541 char *buf)
1542 {
1543 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_bluetooth_emulstate);
1544 }
1545
1546 static ssize_t tpacpi_driver_bluetooth_emulstate_store(
1547 struct device_driver *drv,
1548 const char *buf, size_t count)
1549 {
1550 unsigned long t;
1551
1552 if (parse_strtoul(buf, 1, &t))
1553 return -EINVAL;
1554
1555 tpacpi_bluetooth_emulstate = !!t;
1556
1557 return count;
1558 }
1559
1560 static DRIVER_ATTR(bluetooth_emulstate, S_IWUSR | S_IRUGO,
1561 tpacpi_driver_bluetooth_emulstate_show,
1562 tpacpi_driver_bluetooth_emulstate_store);
1563
1564 /* wwan_emulstate ------------------------------------------------- */
1565 static ssize_t tpacpi_driver_wwan_emulstate_show(
1566 struct device_driver *drv,
1567 char *buf)
1568 {
1569 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_wwan_emulstate);
1570 }
1571
1572 static ssize_t tpacpi_driver_wwan_emulstate_store(
1573 struct device_driver *drv,
1574 const char *buf, size_t count)
1575 {
1576 unsigned long t;
1577
1578 if (parse_strtoul(buf, 1, &t))
1579 return -EINVAL;
1580
1581 tpacpi_wwan_emulstate = !!t;
1582
1583 return count;
1584 }
1585
1586 static DRIVER_ATTR(wwan_emulstate, S_IWUSR | S_IRUGO,
1587 tpacpi_driver_wwan_emulstate_show,
1588 tpacpi_driver_wwan_emulstate_store);
1589
1590 /* uwb_emulstate ------------------------------------------------- */
1591 static ssize_t tpacpi_driver_uwb_emulstate_show(
1592 struct device_driver *drv,
1593 char *buf)
1594 {
1595 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_uwb_emulstate);
1596 }
1597
1598 static ssize_t tpacpi_driver_uwb_emulstate_store(
1599 struct device_driver *drv,
1600 const char *buf, size_t count)
1601 {
1602 unsigned long t;
1603
1604 if (parse_strtoul(buf, 1, &t))
1605 return -EINVAL;
1606
1607 tpacpi_uwb_emulstate = !!t;
1608
1609 return count;
1610 }
1611
1612 static DRIVER_ATTR(uwb_emulstate, S_IWUSR | S_IRUGO,
1613 tpacpi_driver_uwb_emulstate_show,
1614 tpacpi_driver_uwb_emulstate_store);
1615 #endif
1616
1617 /* --------------------------------------------------------------------- */
1618
1619 static struct driver_attribute *tpacpi_driver_attributes[] = {
1620 &driver_attr_debug_level, &driver_attr_version,
1621 &driver_attr_interface_version,
1622 };
1623
1624 static int __init tpacpi_create_driver_attributes(struct device_driver *drv)
1625 {
1626 int i, res;
1627
1628 i = 0;
1629 res = 0;
1630 while (!res && i < ARRAY_SIZE(tpacpi_driver_attributes)) {
1631 res = driver_create_file(drv, tpacpi_driver_attributes[i]);
1632 i++;
1633 }
1634
1635 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
1636 if (!res && dbg_wlswemul)
1637 res = driver_create_file(drv, &driver_attr_wlsw_emulstate);
1638 if (!res && dbg_bluetoothemul)
1639 res = driver_create_file(drv, &driver_attr_bluetooth_emulstate);
1640 if (!res && dbg_wwanemul)
1641 res = driver_create_file(drv, &driver_attr_wwan_emulstate);
1642 if (!res && dbg_uwbemul)
1643 res = driver_create_file(drv, &driver_attr_uwb_emulstate);
1644 #endif
1645
1646 return res;
1647 }
1648
1649 static void tpacpi_remove_driver_attributes(struct device_driver *drv)
1650 {
1651 int i;
1652
1653 for (i = 0; i < ARRAY_SIZE(tpacpi_driver_attributes); i++)
1654 driver_remove_file(drv, tpacpi_driver_attributes[i]);
1655
1656 #ifdef THINKPAD_ACPI_DEBUGFACILITIES
1657 driver_remove_file(drv, &driver_attr_wlsw_emulstate);
1658 driver_remove_file(drv, &driver_attr_bluetooth_emulstate);
1659 driver_remove_file(drv, &driver_attr_wwan_emulstate);
1660 driver_remove_file(drv, &driver_attr_uwb_emulstate);
1661 #endif
1662 }
1663
1664 /*************************************************************************
1665 * Firmware Data
1666 */
1667
1668 /*
1669 * Table of recommended minimum BIOS versions
1670 *
1671 * Reasons for listing:
1672 * 1. Stable BIOS, listed because the unknown amount of
1673 * bugs and bad ACPI behaviour on older versions
1674 *
1675 * 2. BIOS or EC fw with known bugs that trigger on Linux
1676 *
1677 * 3. BIOS with known reduced functionality in older versions
1678 *
1679 * We recommend the latest BIOS and EC version.
1680 * We only support the latest BIOS and EC fw version as a rule.
1681 *
1682 * Sources: IBM ThinkPad Public Web Documents (update changelogs),
1683 * Information from users in ThinkWiki
1684 *
1685 * WARNING: we use this table also to detect that the machine is
1686 * a ThinkPad in some cases, so don't remove entries lightly.
1687 */
1688
1689 #define TPV_Q(__v, __id1, __id2, __bv1, __bv2) \
1690 { .vendor = (__v), \
1691 .bios = TPID(__id1, __id2), \
1692 .ec = TPACPI_MATCH_ANY, \
1693 .quirks = TPACPI_MATCH_ANY << 16 \
1694 | (__bv1) << 8 | (__bv2) }
1695
1696 #define TPV_Q_X(__v, __bid1, __bid2, __bv1, __bv2, \
1697 __eid, __ev1, __ev2) \
1698 { .vendor = (__v), \
1699 .bios = TPID(__bid1, __bid2), \
1700 .ec = __eid, \
1701 .quirks = (__ev1) << 24 | (__ev2) << 16 \
1702 | (__bv1) << 8 | (__bv2) }
1703
1704 #define TPV_QI0(__id1, __id2, __bv1, __bv2) \
1705 TPV_Q(PCI_VENDOR_ID_IBM, __id1, __id2, __bv1, __bv2)
1706
1707 /* Outdated IBM BIOSes often lack the EC id string */
1708 #define TPV_QI1(__id1, __id2, __bv1, __bv2, __ev1, __ev2) \
1709 TPV_Q_X(PCI_VENDOR_ID_IBM, __id1, __id2, \
1710 __bv1, __bv2, TPID(__id1, __id2), \
1711 __ev1, __ev2), \
1712 TPV_Q_X(PCI_VENDOR_ID_IBM, __id1, __id2, \
1713 __bv1, __bv2, TPACPI_MATCH_UNKNOWN, \
1714 __ev1, __ev2)
1715
1716 /* Outdated IBM BIOSes often lack the EC id string */
1717 #define TPV_QI2(__bid1, __bid2, __bv1, __bv2, \
1718 __eid1, __eid2, __ev1, __ev2) \
1719 TPV_Q_X(PCI_VENDOR_ID_IBM, __bid1, __bid2, \
1720 __bv1, __bv2, TPID(__eid1, __eid2), \
1721 __ev1, __ev2), \
1722 TPV_Q_X(PCI_VENDOR_ID_IBM, __bid1, __bid2, \
1723 __bv1, __bv2, TPACPI_MATCH_UNKNOWN, \
1724 __ev1, __ev2)
1725
1726 #define TPV_QL0(__id1, __id2, __bv1, __bv2) \
1727 TPV_Q(PCI_VENDOR_ID_LENOVO, __id1, __id2, __bv1, __bv2)
1728
1729 #define TPV_QL1(__id1, __id2, __bv1, __bv2, __ev1, __ev2) \
1730 TPV_Q_X(PCI_VENDOR_ID_LENOVO, __id1, __id2, \
1731 __bv1, __bv2, TPID(__id1, __id2), \
1732 __ev1, __ev2)
1733
1734 #define TPV_QL2(__bid1, __bid2, __bv1, __bv2, \
1735 __eid1, __eid2, __ev1, __ev2) \
1736 TPV_Q_X(PCI_VENDOR_ID_LENOVO, __bid1, __bid2, \
1737 __bv1, __bv2, TPID(__eid1, __eid2), \
1738 __ev1, __ev2)
1739
1740 static const struct tpacpi_quirk tpacpi_bios_version_qtable[] __initconst = {
1741 /* Numeric models ------------------ */
1742 /* FW MODEL BIOS VERS */
1743 TPV_QI0('I', 'M', '6', '5'), /* 570 */
1744 TPV_QI0('I', 'U', '2', '6'), /* 570E */
1745 TPV_QI0('I', 'B', '5', '4'), /* 600 */
1746 TPV_QI0('I', 'H', '4', '7'), /* 600E */
1747 TPV_QI0('I', 'N', '3', '6'), /* 600E */
1748 TPV_QI0('I', 'T', '5', '5'), /* 600X */
1749 TPV_QI0('I', 'D', '4', '8'), /* 770, 770E, 770ED */
1750 TPV_QI0('I', 'I', '4', '2'), /* 770X */
1751 TPV_QI0('I', 'O', '2', '3'), /* 770Z */
1752
1753 /* A-series ------------------------- */
1754 /* FW MODEL BIOS VERS EC VERS */
1755 TPV_QI0('I', 'W', '5', '9'), /* A20m */
1756 TPV_QI0('I', 'V', '6', '9'), /* A20p */
1757 TPV_QI0('1', '0', '2', '6'), /* A21e, A22e */
1758 TPV_QI0('K', 'U', '3', '6'), /* A21e */
1759 TPV_QI0('K', 'X', '3', '6'), /* A21m, A22m */
1760 TPV_QI0('K', 'Y', '3', '8'), /* A21p, A22p */
1761 TPV_QI0('1', 'B', '1', '7'), /* A22e */
1762 TPV_QI0('1', '3', '2', '0'), /* A22m */
1763 TPV_QI0('1', 'E', '7', '3'), /* A30/p (0) */
1764 TPV_QI1('1', 'G', '4', '1', '1', '7'), /* A31/p (0) */
1765 TPV_QI1('1', 'N', '1', '6', '0', '7'), /* A31/p (0) */
1766
1767 /* G-series ------------------------- */
1768 /* FW MODEL BIOS VERS */
1769 TPV_QI0('1', 'T', 'A', '6'), /* G40 */
1770 TPV_QI0('1', 'X', '5', '7'), /* G41 */
1771
1772 /* R-series, T-series --------------- */
1773 /* FW MODEL BIOS VERS EC VERS */
1774 TPV_QI0('1', 'C', 'F', '0'), /* R30 */
1775 TPV_QI0('1', 'F', 'F', '1'), /* R31 */
1776 TPV_QI0('1', 'M', '9', '7'), /* R32 */
1777 TPV_QI0('1', 'O', '6', '1'), /* R40 */
1778 TPV_QI0('1', 'P', '6', '5'), /* R40 */
1779 TPV_QI0('1', 'S', '7', '0'), /* R40e */
1780 TPV_QI1('1', 'R', 'D', 'R', '7', '1'), /* R50/p, R51,
1781 T40/p, T41/p, T42/p (1) */
1782 TPV_QI1('1', 'V', '7', '1', '2', '8'), /* R50e, R51 (1) */
1783 TPV_QI1('7', '8', '7', '1', '0', '6'), /* R51e (1) */
1784 TPV_QI1('7', '6', '6', '9', '1', '6'), /* R52 (1) */
1785 TPV_QI1('7', '0', '6', '9', '2', '8'), /* R52, T43 (1) */
1786
1787 TPV_QI0('I', 'Y', '6', '1'), /* T20 */
1788 TPV_QI0('K', 'Z', '3', '4'), /* T21 */
1789 TPV_QI0('1', '6', '3', '2'), /* T22 */
1790 TPV_QI1('1', 'A', '6', '4', '2', '3'), /* T23 (0) */
1791 TPV_QI1('1', 'I', '7', '1', '2', '0'), /* T30 (0) */
1792 TPV_QI1('1', 'Y', '6', '5', '2', '9'), /* T43/p (1) */
1793
1794 TPV_QL1('7', '9', 'E', '3', '5', '0'), /* T60/p */
1795 TPV_QL1('7', 'C', 'D', '2', '2', '2'), /* R60, R60i */
1796 TPV_QL1('7', 'E', 'D', '0', '1', '5'), /* R60e, R60i */
1797
1798 /* BIOS FW BIOS VERS EC FW EC VERS */
1799 TPV_QI2('1', 'W', '9', '0', '1', 'V', '2', '8'), /* R50e (1) */
1800 TPV_QL2('7', 'I', '3', '4', '7', '9', '5', '0'), /* T60/p wide */
1801
1802 /* X-series ------------------------- */
1803 /* FW MODEL BIOS VERS EC VERS */
1804 TPV_QI0('I', 'Z', '9', 'D'), /* X20, X21 */
1805 TPV_QI0('1', 'D', '7', '0'), /* X22, X23, X24 */
1806 TPV_QI1('1', 'K', '4', '8', '1', '8'), /* X30 (0) */
1807 TPV_QI1('1', 'Q', '9', '7', '2', '3'), /* X31, X32 (0) */
1808 TPV_QI1('1', 'U', 'D', '3', 'B', '2'), /* X40 (0) */
1809 TPV_QI1('7', '4', '6', '4', '2', '7'), /* X41 (0) */
1810 TPV_QI1('7', '5', '6', '0', '2', '0'), /* X41t (0) */
1811
1812 TPV_QL1('7', 'B', 'D', '7', '4', '0'), /* X60/s */
1813 TPV_QL1('7', 'J', '3', '0', '1', '3'), /* X60t */
1814
1815 /* (0) - older versions lack DMI EC fw string and functionality */
1816 /* (1) - older versions known to lack functionality */
1817 };
1818
1819 #undef TPV_QL1
1820 #undef TPV_QL0
1821 #undef TPV_QI2
1822 #undef TPV_QI1
1823 #undef TPV_QI0
1824 #undef TPV_Q_X
1825 #undef TPV_Q
1826
1827 static void __init tpacpi_check_outdated_fw(void)
1828 {
1829 unsigned long fwvers;
1830 u16 ec_version, bios_version;
1831
1832 fwvers = tpacpi_check_quirks(tpacpi_bios_version_qtable,
1833 ARRAY_SIZE(tpacpi_bios_version_qtable));
1834
1835 if (!fwvers)
1836 return;
1837
1838 bios_version = fwvers & 0xffffU;
1839 ec_version = (fwvers >> 16) & 0xffffU;
1840
1841 /* note that unknown versions are set to 0x0000 and we use that */
1842 if ((bios_version > thinkpad_id.bios_release) ||
1843 (ec_version > thinkpad_id.ec_release &&
1844 ec_version != TPACPI_MATCH_ANY)) {
1845 /*
1846 * The changelogs would let us track down the exact
1847 * reason, but it is just too much of a pain to track
1848 * it. We only list BIOSes that are either really
1849 * broken, or really stable to begin with, so it is
1850 * best if the user upgrades the firmware anyway.
1851 */
1852 printk(TPACPI_WARN
1853 "WARNING: Outdated ThinkPad BIOS/EC firmware\n");
1854 printk(TPACPI_WARN
1855 "WARNING: This firmware may be missing critical bug "
1856 "fixes and/or important features\n");
1857 }
1858 }
1859
1860 static bool __init tpacpi_is_fw_known(void)
1861 {
1862 return tpacpi_check_quirks(tpacpi_bios_version_qtable,
1863 ARRAY_SIZE(tpacpi_bios_version_qtable)) != 0;
1864 }
1865
1866 /****************************************************************************
1867 ****************************************************************************
1868 *
1869 * Subdrivers
1870 *
1871 ****************************************************************************
1872 ****************************************************************************/
1873
1874 /*************************************************************************
1875 * thinkpad-acpi init subdriver
1876 */
1877
1878 static int __init thinkpad_acpi_driver_init(struct ibm_init_struct *iibm)
1879 {
1880 printk(TPACPI_INFO "%s v%s\n", TPACPI_DESC, TPACPI_VERSION);
1881 printk(TPACPI_INFO "%s\n", TPACPI_URL);
1882
1883 printk(TPACPI_INFO "ThinkPad BIOS %s, EC %s\n",
1884 (thinkpad_id.bios_version_str) ?
1885 thinkpad_id.bios_version_str : "unknown",
1886 (thinkpad_id.ec_version_str) ?
1887 thinkpad_id.ec_version_str : "unknown");
1888
1889 if (thinkpad_id.vendor && thinkpad_id.model_str)
1890 printk(TPACPI_INFO "%s %s, model %s\n",
1891 (thinkpad_id.vendor == PCI_VENDOR_ID_IBM) ?
1892 "IBM" : ((thinkpad_id.vendor ==
1893 PCI_VENDOR_ID_LENOVO) ?
1894 "Lenovo" : "Unknown vendor"),
1895 thinkpad_id.model_str,
1896 (thinkpad_id.nummodel_str) ?
1897 thinkpad_id.nummodel_str : "unknown");
1898
1899 tpacpi_check_outdated_fw();
1900 return 0;
1901 }
1902
1903 static int thinkpad_acpi_driver_read(struct seq_file *m)
1904 {
1905 seq_printf(m, "driver:\t\t%s\n", TPACPI_DESC);
1906 seq_printf(m, "version:\t%s\n", TPACPI_VERSION);
1907 return 0;
1908 }
1909
1910 static struct ibm_struct thinkpad_acpi_driver_data = {
1911 .name = "driver",
1912 .read = thinkpad_acpi_driver_read,
1913 };
1914
1915 /*************************************************************************
1916 * Hotkey subdriver
1917 */
1918
1919 /*
1920 * ThinkPad firmware event model
1921 *
1922 * The ThinkPad firmware has two main event interfaces: normal ACPI
1923 * notifications (which follow the ACPI standard), and a private event
1924 * interface.
1925 *
1926 * The private event interface also issues events for the hotkeys. As
1927 * the driver gained features, the event handling code ended up being
1928 * built around the hotkey subdriver. This will need to be refactored
1929 * to a more formal event API eventually.
1930 *
1931 * Some "hotkeys" are actually supposed to be used as event reports,
1932 * such as "brightness has changed", "volume has changed", depending on
1933 * the ThinkPad model and how the firmware is operating.
1934 *
1935 * Unlike other classes, hotkey-class events have mask/unmask control on
1936 * non-ancient firmware. However, how it behaves changes a lot with the
1937 * firmware model and version.
1938 */
1939
1940 enum { /* hot key scan codes (derived from ACPI DSDT) */
1941 TP_ACPI_HOTKEYSCAN_FNF1 = 0,
1942 TP_ACPI_HOTKEYSCAN_FNF2,
1943 TP_ACPI_HOTKEYSCAN_FNF3,
1944 TP_ACPI_HOTKEYSCAN_FNF4,
1945 TP_ACPI_HOTKEYSCAN_FNF5,
1946 TP_ACPI_HOTKEYSCAN_FNF6,
1947 TP_ACPI_HOTKEYSCAN_FNF7,
1948 TP_ACPI_HOTKEYSCAN_FNF8,
1949 TP_ACPI_HOTKEYSCAN_FNF9,
1950 TP_ACPI_HOTKEYSCAN_FNF10,
1951 TP_ACPI_HOTKEYSCAN_FNF11,
1952 TP_ACPI_HOTKEYSCAN_FNF12,
1953 TP_ACPI_HOTKEYSCAN_FNBACKSPACE,
1954 TP_ACPI_HOTKEYSCAN_FNINSERT,
1955 TP_ACPI_HOTKEYSCAN_FNDELETE,
1956 TP_ACPI_HOTKEYSCAN_FNHOME,
1957 TP_ACPI_HOTKEYSCAN_FNEND,
1958 TP_ACPI_HOTKEYSCAN_FNPAGEUP,
1959 TP_ACPI_HOTKEYSCAN_FNPAGEDOWN,
1960 TP_ACPI_HOTKEYSCAN_FNSPACE,
1961 TP_ACPI_HOTKEYSCAN_VOLUMEUP,
1962 TP_ACPI_HOTKEYSCAN_VOLUMEDOWN,
1963 TP_ACPI_HOTKEYSCAN_MUTE,
1964 TP_ACPI_HOTKEYSCAN_THINKPAD,
1965 };
1966
1967 enum { /* Keys/events available through NVRAM polling */
1968 TPACPI_HKEY_NVRAM_KNOWN_MASK = 0x00fb88c0U,
1969 TPACPI_HKEY_NVRAM_GOOD_MASK = 0x00fb8000U,
1970 };
1971
1972 enum { /* Positions of some of the keys in hotkey masks */
1973 TP_ACPI_HKEY_DISPSWTCH_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF7,
1974 TP_ACPI_HKEY_DISPXPAND_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF8,
1975 TP_ACPI_HKEY_HIBERNATE_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF12,
1976 TP_ACPI_HKEY_BRGHTUP_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNHOME,
1977 TP_ACPI_HKEY_BRGHTDWN_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNEND,
1978 TP_ACPI_HKEY_THNKLGHT_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNPAGEUP,
1979 TP_ACPI_HKEY_ZOOM_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNSPACE,
1980 TP_ACPI_HKEY_VOLUP_MASK = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEUP,
1981 TP_ACPI_HKEY_VOLDWN_MASK = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEDOWN,
1982 TP_ACPI_HKEY_MUTE_MASK = 1 << TP_ACPI_HOTKEYSCAN_MUTE,
1983 TP_ACPI_HKEY_THINKPAD_MASK = 1 << TP_ACPI_HOTKEYSCAN_THINKPAD,
1984 };
1985
1986 enum { /* NVRAM to ACPI HKEY group map */
1987 TP_NVRAM_HKEY_GROUP_HK2 = TP_ACPI_HKEY_THINKPAD_MASK |
1988 TP_ACPI_HKEY_ZOOM_MASK |
1989 TP_ACPI_HKEY_DISPSWTCH_MASK |
1990 TP_ACPI_HKEY_HIBERNATE_MASK,
1991 TP_NVRAM_HKEY_GROUP_BRIGHTNESS = TP_ACPI_HKEY_BRGHTUP_MASK |
1992 TP_ACPI_HKEY_BRGHTDWN_MASK,
1993 TP_NVRAM_HKEY_GROUP_VOLUME = TP_ACPI_HKEY_VOLUP_MASK |
1994 TP_ACPI_HKEY_VOLDWN_MASK |
1995 TP_ACPI_HKEY_MUTE_MASK,
1996 };
1997
1998 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1999 struct tp_nvram_state {
2000 u16 thinkpad_toggle:1;
2001 u16 zoom_toggle:1;
2002 u16 display_toggle:1;
2003 u16 thinklight_toggle:1;
2004 u16 hibernate_toggle:1;
2005 u16 displayexp_toggle:1;
2006 u16 display_state:1;
2007 u16 brightness_toggle:1;
2008 u16 volume_toggle:1;
2009 u16 mute:1;
2010
2011 u8 brightness_level;
2012 u8 volume_level;
2013 };
2014
2015 /* kthread for the hotkey poller */
2016 static struct task_struct *tpacpi_hotkey_task;
2017
2018 /* Acquired while the poller kthread is running, use to sync start/stop */
2019 static struct mutex hotkey_thread_mutex;
2020
2021 /*
2022 * Acquire mutex to write poller control variables as an
2023 * atomic block.
2024 *
2025 * Increment hotkey_config_change when changing them if you
2026 * want the kthread to forget old state.
2027 *
2028 * See HOTKEY_CONFIG_CRITICAL_START/HOTKEY_CONFIG_CRITICAL_END
2029 */
2030 static struct mutex hotkey_thread_data_mutex;
2031 static unsigned int hotkey_config_change;
2032
2033 /*
2034 * hotkey poller control variables
2035 *
2036 * Must be atomic or readers will also need to acquire mutex
2037 *
2038 * HOTKEY_CONFIG_CRITICAL_START/HOTKEY_CONFIG_CRITICAL_END
2039 * should be used only when the changes need to be taken as
2040 * a block, OR when one needs to force the kthread to forget
2041 * old state.
2042 */
2043 static u32 hotkey_source_mask; /* bit mask 0=ACPI,1=NVRAM */
2044 static unsigned int hotkey_poll_freq = 10; /* Hz */
2045
2046 #define HOTKEY_CONFIG_CRITICAL_START \
2047 do { \
2048 mutex_lock(&hotkey_thread_data_mutex); \
2049 hotkey_config_change++; \
2050 } while (0);
2051 #define HOTKEY_CONFIG_CRITICAL_END \
2052 mutex_unlock(&hotkey_thread_data_mutex);
2053
2054 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2055
2056 #define hotkey_source_mask 0U
2057 #define HOTKEY_CONFIG_CRITICAL_START
2058 #define HOTKEY_CONFIG_CRITICAL_END
2059
2060 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2061
2062 static struct mutex hotkey_mutex;
2063
2064 static enum { /* Reasons for waking up */
2065 TP_ACPI_WAKEUP_NONE = 0, /* None or unknown */
2066 TP_ACPI_WAKEUP_BAYEJ, /* Bay ejection request */
2067 TP_ACPI_WAKEUP_UNDOCK, /* Undock request */
2068 } hotkey_wakeup_reason;
2069
2070 static int hotkey_autosleep_ack;
2071
2072 static u32 hotkey_orig_mask; /* events the BIOS had enabled */
2073 static u32 hotkey_all_mask; /* all events supported in fw */
2074 static u32 hotkey_reserved_mask; /* events better left disabled */
2075 static u32 hotkey_driver_mask; /* events needed by the driver */
2076 static u32 hotkey_user_mask; /* events visible to userspace */
2077 static u32 hotkey_acpi_mask; /* events enabled in firmware */
2078
2079 static unsigned int hotkey_report_mode;
2080
2081 static u16 *hotkey_keycode_map;
2082
2083 static struct attribute_set *hotkey_dev_attributes;
2084
2085 static void tpacpi_driver_event(const unsigned int hkey_event);
2086 static void hotkey_driver_event(const unsigned int scancode);
2087 static void hotkey_poll_setup(const bool may_warn);
2088
2089 /* HKEY.MHKG() return bits */
2090 #define TP_HOTKEY_TABLET_MASK (1 << 3)
2091
2092 static int hotkey_get_wlsw(void)
2093 {
2094 int status;
2095
2096 if (!tp_features.hotkey_wlsw)
2097 return -ENODEV;
2098
2099 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
2100 if (dbg_wlswemul)
2101 return (tpacpi_wlsw_emulstate) ?
2102 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
2103 #endif
2104
2105 if (!acpi_evalf(hkey_handle, &status, "WLSW", "d"))
2106 return -EIO;
2107
2108 return (status) ? TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
2109 }
2110
2111 static int hotkey_get_tablet_mode(int *status)
2112 {
2113 int s;
2114
2115 if (!acpi_evalf(hkey_handle, &s, "MHKG", "d"))
2116 return -EIO;
2117
2118 *status = ((s & TP_HOTKEY_TABLET_MASK) != 0);
2119 return 0;
2120 }
2121
2122 /*
2123 * Reads current event mask from firmware, and updates
2124 * hotkey_acpi_mask accordingly. Also resets any bits
2125 * from hotkey_user_mask that are unavailable to be
2126 * delivered (shadow requirement of the userspace ABI).
2127 *
2128 * Call with hotkey_mutex held
2129 */
2130 static int hotkey_mask_get(void)
2131 {
2132 if (tp_features.hotkey_mask) {
2133 u32 m = 0;
2134
2135 if (!acpi_evalf(hkey_handle, &m, "DHKN", "d"))
2136 return -EIO;
2137
2138 hotkey_acpi_mask = m;
2139 } else {
2140 /* no mask support doesn't mean no event support... */
2141 hotkey_acpi_mask = hotkey_all_mask;
2142 }
2143
2144 /* sync userspace-visible mask */
2145 hotkey_user_mask &= (hotkey_acpi_mask | hotkey_source_mask);
2146
2147 return 0;
2148 }
2149
2150 void static hotkey_mask_warn_incomplete_mask(void)
2151 {
2152 /* log only what the user can fix... */
2153 const u32 wantedmask = hotkey_driver_mask &
2154 ~(hotkey_acpi_mask | hotkey_source_mask) &
2155 (hotkey_all_mask | TPACPI_HKEY_NVRAM_KNOWN_MASK);
2156
2157 if (wantedmask)
2158 printk(TPACPI_NOTICE
2159 "required events 0x%08x not enabled!\n",
2160 wantedmask);
2161 }
2162
2163 /*
2164 * Set the firmware mask when supported
2165 *
2166 * Also calls hotkey_mask_get to update hotkey_acpi_mask.
2167 *
2168 * NOTE: does not set bits in hotkey_user_mask, but may reset them.
2169 *
2170 * Call with hotkey_mutex held
2171 */
2172 static int hotkey_mask_set(u32 mask)
2173 {
2174 int i;
2175 int rc = 0;
2176
2177 const u32 fwmask = mask & ~hotkey_source_mask;
2178
2179 if (tp_features.hotkey_mask) {
2180 for (i = 0; i < 32; i++) {
2181 if (!acpi_evalf(hkey_handle,
2182 NULL, "MHKM", "vdd", i + 1,
2183 !!(mask & (1 << i)))) {
2184 rc = -EIO;
2185 break;
2186 }
2187 }
2188 }
2189
2190 /*
2191 * We *must* make an inconditional call to hotkey_mask_get to
2192 * refresh hotkey_acpi_mask and update hotkey_user_mask
2193 *
2194 * Take the opportunity to also log when we cannot _enable_
2195 * a given event.
2196 */
2197 if (!hotkey_mask_get() && !rc && (fwmask & ~hotkey_acpi_mask)) {
2198 printk(TPACPI_NOTICE
2199 "asked for hotkey mask 0x%08x, but "
2200 "firmware forced it to 0x%08x\n",
2201 fwmask, hotkey_acpi_mask);
2202 }
2203
2204 if (tpacpi_lifecycle != TPACPI_LIFE_EXITING)
2205 hotkey_mask_warn_incomplete_mask();
2206
2207 return rc;
2208 }
2209
2210 /*
2211 * Sets hotkey_user_mask and tries to set the firmware mask
2212 *
2213 * Call with hotkey_mutex held
2214 */
2215 static int hotkey_user_mask_set(const u32 mask)
2216 {
2217 int rc;
2218
2219 /* Give people a chance to notice they are doing something that
2220 * is bound to go boom on their users sooner or later */
2221 if (!tp_warned.hotkey_mask_ff &&
2222 (mask == 0xffff || mask == 0xffffff ||
2223 mask == 0xffffffff)) {
2224 tp_warned.hotkey_mask_ff = 1;
2225 printk(TPACPI_NOTICE
2226 "setting the hotkey mask to 0x%08x is likely "
2227 "not the best way to go about it\n", mask);
2228 printk(TPACPI_NOTICE
2229 "please consider using the driver defaults, "
2230 "and refer to up-to-date thinkpad-acpi "
2231 "documentation\n");
2232 }
2233
2234 /* Try to enable what the user asked for, plus whatever we need.
2235 * this syncs everything but won't enable bits in hotkey_user_mask */
2236 rc = hotkey_mask_set((mask | hotkey_driver_mask) & ~hotkey_source_mask);
2237
2238 /* Enable the available bits in hotkey_user_mask */
2239 hotkey_user_mask = mask & (hotkey_acpi_mask | hotkey_source_mask);
2240
2241 return rc;
2242 }
2243
2244 /*
2245 * Sets the driver hotkey mask.
2246 *
2247 * Can be called even if the hotkey subdriver is inactive
2248 */
2249 static int tpacpi_hotkey_driver_mask_set(const u32 mask)
2250 {
2251 int rc;
2252
2253 /* Do the right thing if hotkey_init has not been called yet */
2254 if (!tp_features.hotkey) {
2255 hotkey_driver_mask = mask;
2256 return 0;
2257 }
2258
2259 mutex_lock(&hotkey_mutex);
2260
2261 HOTKEY_CONFIG_CRITICAL_START
2262 hotkey_driver_mask = mask;
2263 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2264 hotkey_source_mask |= (mask & ~hotkey_all_mask);
2265 #endif
2266 HOTKEY_CONFIG_CRITICAL_END
2267
2268 rc = hotkey_mask_set((hotkey_acpi_mask | hotkey_driver_mask) &
2269 ~hotkey_source_mask);
2270 hotkey_poll_setup(true);
2271
2272 mutex_unlock(&hotkey_mutex);
2273
2274 return rc;
2275 }
2276
2277 static int hotkey_status_get(int *status)
2278 {
2279 if (!acpi_evalf(hkey_handle, status, "DHKC", "d"))
2280 return -EIO;
2281
2282 return 0;
2283 }
2284
2285 static int hotkey_status_set(bool enable)
2286 {
2287 if (!acpi_evalf(hkey_handle, NULL, "MHKC", "vd", enable ? 1 : 0))
2288 return -EIO;
2289
2290 return 0;
2291 }
2292
2293 static void tpacpi_input_send_tabletsw(void)
2294 {
2295 int state;
2296
2297 if (tp_features.hotkey_tablet &&
2298 !hotkey_get_tablet_mode(&state)) {
2299 mutex_lock(&tpacpi_inputdev_send_mutex);
2300
2301 input_report_switch(tpacpi_inputdev,
2302 SW_TABLET_MODE, !!state);
2303 input_sync(tpacpi_inputdev);
2304
2305 mutex_unlock(&tpacpi_inputdev_send_mutex);
2306 }
2307 }
2308
2309 /* Do NOT call without validating scancode first */
2310 static void tpacpi_input_send_key(const unsigned int scancode)
2311 {
2312 const unsigned int keycode = hotkey_keycode_map[scancode];
2313
2314 if (keycode != KEY_RESERVED) {
2315 mutex_lock(&tpacpi_inputdev_send_mutex);
2316
2317 input_report_key(tpacpi_inputdev, keycode, 1);
2318 if (keycode == KEY_UNKNOWN)
2319 input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN,
2320 scancode);
2321 input_sync(tpacpi_inputdev);
2322
2323 input_report_key(tpacpi_inputdev, keycode, 0);
2324 if (keycode == KEY_UNKNOWN)
2325 input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN,
2326 scancode);
2327 input_sync(tpacpi_inputdev);
2328
2329 mutex_unlock(&tpacpi_inputdev_send_mutex);
2330 }
2331 }
2332
2333 /* Do NOT call without validating scancode first */
2334 static void tpacpi_input_send_key_masked(const unsigned int scancode)
2335 {
2336 hotkey_driver_event(scancode);
2337 if (hotkey_user_mask & (1 << scancode))
2338 tpacpi_input_send_key(scancode);
2339 }
2340
2341 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2342 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver;
2343
2344 /* Do NOT call without validating scancode first */
2345 static void tpacpi_hotkey_send_key(unsigned int scancode)
2346 {
2347 tpacpi_input_send_key_masked(scancode);
2348 if (hotkey_report_mode < 2) {
2349 acpi_bus_generate_proc_event(ibm_hotkey_acpidriver.device,
2350 0x80, TP_HKEY_EV_HOTKEY_BASE + scancode);
2351 }
2352 }
2353
2354 static void hotkey_read_nvram(struct tp_nvram_state *n, const u32 m)
2355 {
2356 u8 d;
2357
2358 if (m & TP_NVRAM_HKEY_GROUP_HK2) {
2359 d = nvram_read_byte(TP_NVRAM_ADDR_HK2);
2360 n->thinkpad_toggle = !!(d & TP_NVRAM_MASK_HKT_THINKPAD);
2361 n->zoom_toggle = !!(d & TP_NVRAM_MASK_HKT_ZOOM);
2362 n->display_toggle = !!(d & TP_NVRAM_MASK_HKT_DISPLAY);
2363 n->hibernate_toggle = !!(d & TP_NVRAM_MASK_HKT_HIBERNATE);
2364 }
2365 if (m & TP_ACPI_HKEY_THNKLGHT_MASK) {
2366 d = nvram_read_byte(TP_NVRAM_ADDR_THINKLIGHT);
2367 n->thinklight_toggle = !!(d & TP_NVRAM_MASK_THINKLIGHT);
2368 }
2369 if (m & TP_ACPI_HKEY_DISPXPAND_MASK) {
2370 d = nvram_read_byte(TP_NVRAM_ADDR_VIDEO);
2371 n->displayexp_toggle =
2372 !!(d & TP_NVRAM_MASK_HKT_DISPEXPND);
2373 }
2374 if (m & TP_NVRAM_HKEY_GROUP_BRIGHTNESS) {
2375 d = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS);
2376 n->brightness_level = (d & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
2377 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
2378 n->brightness_toggle =
2379 !!(d & TP_NVRAM_MASK_HKT_BRIGHTNESS);
2380 }
2381 if (m & TP_NVRAM_HKEY_GROUP_VOLUME) {
2382 d = nvram_read_byte(TP_NVRAM_ADDR_MIXER);
2383 n->volume_level = (d & TP_NVRAM_MASK_LEVEL_VOLUME)
2384 >> TP_NVRAM_POS_LEVEL_VOLUME;
2385 n->mute = !!(d & TP_NVRAM_MASK_MUTE);
2386 n->volume_toggle = !!(d & TP_NVRAM_MASK_HKT_VOLUME);
2387 }
2388 }
2389
2390 static void hotkey_compare_and_issue_event(struct tp_nvram_state *oldn,
2391 struct tp_nvram_state *newn,
2392 const u32 event_mask)
2393 {
2394
2395 #define TPACPI_COMPARE_KEY(__scancode, __member) \
2396 do { \
2397 if ((event_mask & (1 << __scancode)) && \
2398 oldn->__member != newn->__member) \
2399 tpacpi_hotkey_send_key(__scancode); \
2400 } while (0)
2401
2402 #define TPACPI_MAY_SEND_KEY(__scancode) \
2403 do { \
2404 if (event_mask & (1 << __scancode)) \
2405 tpacpi_hotkey_send_key(__scancode); \
2406 } while (0)
2407
2408 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_THINKPAD, thinkpad_toggle);
2409 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNSPACE, zoom_toggle);
2410 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF7, display_toggle);
2411 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF12, hibernate_toggle);
2412
2413 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNPAGEUP, thinklight_toggle);
2414
2415 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF8, displayexp_toggle);
2416
2417 /* handle volume */
2418 if (oldn->volume_toggle != newn->volume_toggle) {
2419 if (oldn->mute != newn->mute) {
2420 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE);
2421 }
2422 if (oldn->volume_level > newn->volume_level) {
2423 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
2424 } else if (oldn->volume_level < newn->volume_level) {
2425 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
2426 } else if (oldn->mute == newn->mute) {
2427 /* repeated key presses that didn't change state */
2428 if (newn->mute) {
2429 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE);
2430 } else if (newn->volume_level != 0) {
2431 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
2432 } else {
2433 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
2434 }
2435 }
2436 }
2437
2438 /* handle brightness */
2439 if (oldn->brightness_toggle != newn->brightness_toggle) {
2440 if (oldn->brightness_level < newn->brightness_level) {
2441 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
2442 } else if (oldn->brightness_level > newn->brightness_level) {
2443 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
2444 } else {
2445 /* repeated key presses that didn't change state */
2446 if (newn->brightness_level != 0) {
2447 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
2448 } else {
2449 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
2450 }
2451 }
2452 }
2453
2454 #undef TPACPI_COMPARE_KEY
2455 #undef TPACPI_MAY_SEND_KEY
2456 }
2457
2458 /*
2459 * Polling driver
2460 *
2461 * We track all events in hotkey_source_mask all the time, since
2462 * most of them are edge-based. We only issue those requested by
2463 * hotkey_user_mask or hotkey_driver_mask, though.
2464 */
2465 static int hotkey_kthread(void *data)
2466 {
2467 struct tp_nvram_state s[2];
2468 u32 poll_mask, event_mask;
2469 unsigned int si, so;
2470 unsigned long t;
2471 unsigned int change_detector, must_reset;
2472 unsigned int poll_freq;
2473
2474 mutex_lock(&hotkey_thread_mutex);
2475
2476 if (tpacpi_lifecycle == TPACPI_LIFE_EXITING)
2477 goto exit;
2478
2479 set_freezable();
2480
2481 so = 0;
2482 si = 1;
2483 t = 0;
2484
2485 /* Initial state for compares */
2486 mutex_lock(&hotkey_thread_data_mutex);
2487 change_detector = hotkey_config_change;
2488 poll_mask = hotkey_source_mask;
2489 event_mask = hotkey_source_mask &
2490 (hotkey_driver_mask | hotkey_user_mask);
2491 poll_freq = hotkey_poll_freq;
2492 mutex_unlock(&hotkey_thread_data_mutex);
2493 hotkey_read_nvram(&s[so], poll_mask);
2494
2495 while (!kthread_should_stop()) {
2496 if (t == 0) {
2497 if (likely(poll_freq))
2498 t = 1000/poll_freq;
2499 else
2500 t = 100; /* should never happen... */
2501 }
2502 t = msleep_interruptible(t);
2503 if (unlikely(kthread_should_stop()))
2504 break;
2505 must_reset = try_to_freeze();
2506 if (t > 0 && !must_reset)
2507 continue;
2508
2509 mutex_lock(&hotkey_thread_data_mutex);
2510 if (must_reset || hotkey_config_change != change_detector) {
2511 /* forget old state on thaw or config change */
2512 si = so;
2513 t = 0;
2514 change_detector = hotkey_config_change;
2515 }
2516 poll_mask = hotkey_source_mask;
2517 event_mask = hotkey_source_mask &
2518 (hotkey_driver_mask | hotkey_user_mask);
2519 poll_freq = hotkey_poll_freq;
2520 mutex_unlock(&hotkey_thread_data_mutex);
2521
2522 if (likely(poll_mask)) {
2523 hotkey_read_nvram(&s[si], poll_mask);
2524 if (likely(si != so)) {
2525 hotkey_compare_and_issue_event(&s[so], &s[si],
2526 event_mask);
2527 }
2528 }
2529
2530 so = si;
2531 si ^= 1;
2532 }
2533
2534 exit:
2535 mutex_unlock(&hotkey_thread_mutex);
2536 return 0;
2537 }
2538
2539 /* call with hotkey_mutex held */
2540 static void hotkey_poll_stop_sync(void)
2541 {
2542 if (tpacpi_hotkey_task) {
2543 if (frozen(tpacpi_hotkey_task) ||
2544 freezing(tpacpi_hotkey_task))
2545 thaw_process(tpacpi_hotkey_task);
2546
2547 kthread_stop(tpacpi_hotkey_task);
2548 tpacpi_hotkey_task = NULL;
2549 mutex_lock(&hotkey_thread_mutex);
2550 /* at this point, the thread did exit */
2551 mutex_unlock(&hotkey_thread_mutex);
2552 }
2553 }
2554
2555 /* call with hotkey_mutex held */
2556 static void hotkey_poll_setup(const bool may_warn)
2557 {
2558 const u32 poll_driver_mask = hotkey_driver_mask & hotkey_source_mask;
2559 const u32 poll_user_mask = hotkey_user_mask & hotkey_source_mask;
2560
2561 if (hotkey_poll_freq > 0 &&
2562 (poll_driver_mask ||
2563 (poll_user_mask && tpacpi_inputdev->users > 0))) {
2564 if (!tpacpi_hotkey_task) {
2565 tpacpi_hotkey_task = kthread_run(hotkey_kthread,
2566 NULL, TPACPI_NVRAM_KTHREAD_NAME);
2567 if (IS_ERR(tpacpi_hotkey_task)) {
2568 tpacpi_hotkey_task = NULL;
2569 printk(TPACPI_ERR
2570 "could not create kernel thread "
2571 "for hotkey polling\n");
2572 }
2573 }
2574 } else {
2575 hotkey_poll_stop_sync();
2576 if (may_warn && (poll_driver_mask || poll_user_mask) &&
2577 hotkey_poll_freq == 0) {
2578 printk(TPACPI_NOTICE
2579 "hot keys 0x%08x and/or events 0x%08x "
2580 "require polling, which is currently "
2581 "disabled\n",
2582 poll_user_mask, poll_driver_mask);
2583 }
2584 }
2585 }
2586
2587 static void hotkey_poll_setup_safe(const bool may_warn)
2588 {
2589 mutex_lock(&hotkey_mutex);
2590 hotkey_poll_setup(may_warn);
2591 mutex_unlock(&hotkey_mutex);
2592 }
2593
2594 /* call with hotkey_mutex held */
2595 static void hotkey_poll_set_freq(unsigned int freq)
2596 {
2597 if (!freq)
2598 hotkey_poll_stop_sync();
2599
2600 hotkey_poll_freq = freq;
2601 }
2602
2603 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2604
2605 static void hotkey_poll_setup(const bool __unused)
2606 {
2607 }
2608
2609 static void hotkey_poll_setup_safe(const bool __unused)
2610 {
2611 }
2612
2613 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2614
2615 static int hotkey_inputdev_open(struct input_dev *dev)
2616 {
2617 switch (tpacpi_lifecycle) {
2618 case TPACPI_LIFE_INIT:
2619 case TPACPI_LIFE_RUNNING:
2620 hotkey_poll_setup_safe(false);
2621 return 0;
2622 case TPACPI_LIFE_EXITING:
2623 return -EBUSY;
2624 }
2625
2626 /* Should only happen if tpacpi_lifecycle is corrupt */
2627 BUG();
2628 return -EBUSY;
2629 }
2630
2631 static void hotkey_inputdev_close(struct input_dev *dev)
2632 {
2633 /* disable hotkey polling when possible */
2634 if (tpacpi_lifecycle != TPACPI_LIFE_EXITING &&
2635 !(hotkey_source_mask & hotkey_driver_mask))
2636 hotkey_poll_setup_safe(false);
2637 }
2638
2639 /* sysfs hotkey enable ------------------------------------------------- */
2640 static ssize_t hotkey_enable_show(struct device *dev,
2641 struct device_attribute *attr,
2642 char *buf)
2643 {
2644 int res, status;
2645
2646 printk_deprecated_attribute("hotkey_enable",
2647 "Hotkey reporting is always enabled");
2648
2649 res = hotkey_status_get(&status);
2650 if (res)
2651 return res;
2652
2653 return snprintf(buf, PAGE_SIZE, "%d\n", status);
2654 }
2655
2656 static ssize_t hotkey_enable_store(struct device *dev,
2657 struct device_attribute *attr,
2658 const char *buf, size_t count)
2659 {
2660 unsigned long t;
2661
2662 printk_deprecated_attribute("hotkey_enable",
2663 "Hotkeys can be disabled through hotkey_mask");
2664
2665 if (parse_strtoul(buf, 1, &t))
2666 return -EINVAL;
2667
2668 if (t == 0)
2669 return -EPERM;
2670
2671 return count;
2672 }
2673
2674 static struct device_attribute dev_attr_hotkey_enable =
2675 __ATTR(hotkey_enable, S_IWUSR | S_IRUGO,
2676 hotkey_enable_show, hotkey_enable_store);
2677
2678 /* sysfs hotkey mask --------------------------------------------------- */
2679 static ssize_t hotkey_mask_show(struct device *dev,
2680 struct device_attribute *attr,
2681 char *buf)
2682 {
2683 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_user_mask);
2684 }
2685
2686 static ssize_t hotkey_mask_store(struct device *dev,
2687 struct device_attribute *attr,
2688 const char *buf, size_t count)
2689 {
2690 unsigned long t;
2691 int res;
2692
2693 if (parse_strtoul(buf, 0xffffffffUL, &t))
2694 return -EINVAL;
2695
2696 if (mutex_lock_killable(&hotkey_mutex))
2697 return -ERESTARTSYS;
2698
2699 res = hotkey_user_mask_set(t);
2700
2701 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2702 hotkey_poll_setup(true);
2703 #endif
2704
2705 mutex_unlock(&hotkey_mutex);
2706
2707 tpacpi_disclose_usertask("hotkey_mask", "set to 0x%08lx\n", t);
2708
2709 return (res) ? res : count;
2710 }
2711
2712 static struct device_attribute dev_attr_hotkey_mask =
2713 __ATTR(hotkey_mask, S_IWUSR | S_IRUGO,
2714 hotkey_mask_show, hotkey_mask_store);
2715
2716 /* sysfs hotkey bios_enabled ------------------------------------------- */
2717 static ssize_t hotkey_bios_enabled_show(struct device *dev,
2718 struct device_attribute *attr,
2719 char *buf)
2720 {
2721 return sprintf(buf, "0\n");
2722 }
2723
2724 static struct device_attribute dev_attr_hotkey_bios_enabled =
2725 __ATTR(hotkey_bios_enabled, S_IRUGO, hotkey_bios_enabled_show, NULL);
2726
2727 /* sysfs hotkey bios_mask ---------------------------------------------- */
2728 static ssize_t hotkey_bios_mask_show(struct device *dev,
2729 struct device_attribute *attr,
2730 char *buf)
2731 {
2732 printk_deprecated_attribute("hotkey_bios_mask",
2733 "This attribute is useless.");
2734 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_orig_mask);
2735 }
2736
2737 static struct device_attribute dev_attr_hotkey_bios_mask =
2738 __ATTR(hotkey_bios_mask, S_IRUGO, hotkey_bios_mask_show, NULL);
2739
2740 /* sysfs hotkey all_mask ----------------------------------------------- */
2741 static ssize_t hotkey_all_mask_show(struct device *dev,
2742 struct device_attribute *attr,
2743 char *buf)
2744 {
2745 return snprintf(buf, PAGE_SIZE, "0x%08x\n",
2746 hotkey_all_mask | hotkey_source_mask);
2747 }
2748
2749 static struct device_attribute dev_attr_hotkey_all_mask =
2750 __ATTR(hotkey_all_mask, S_IRUGO, hotkey_all_mask_show, NULL);
2751
2752 /* sysfs hotkey recommended_mask --------------------------------------- */
2753 static ssize_t hotkey_recommended_mask_show(struct device *dev,
2754 struct device_attribute *attr,
2755 char *buf)
2756 {
2757 return snprintf(buf, PAGE_SIZE, "0x%08x\n",
2758 (hotkey_all_mask | hotkey_source_mask)
2759 & ~hotkey_reserved_mask);
2760 }
2761
2762 static struct device_attribute dev_attr_hotkey_recommended_mask =
2763 __ATTR(hotkey_recommended_mask, S_IRUGO,
2764 hotkey_recommended_mask_show, NULL);
2765
2766 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2767
2768 /* sysfs hotkey hotkey_source_mask ------------------------------------- */
2769 static ssize_t hotkey_source_mask_show(struct device *dev,
2770 struct device_attribute *attr,
2771 char *buf)
2772 {
2773 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_source_mask);
2774 }
2775
2776 static ssize_t hotkey_source_mask_store(struct device *dev,
2777 struct device_attribute *attr,
2778 const char *buf, size_t count)
2779 {
2780 unsigned long t;
2781 u32 r_ev;
2782 int rc;
2783
2784 if (parse_strtoul(buf, 0xffffffffUL, &t) ||
2785 ((t & ~TPACPI_HKEY_NVRAM_KNOWN_MASK) != 0))
2786 return -EINVAL;
2787
2788 if (mutex_lock_killable(&hotkey_mutex))
2789 return -ERESTARTSYS;
2790
2791 HOTKEY_CONFIG_CRITICAL_START
2792 hotkey_source_mask = t;
2793 HOTKEY_CONFIG_CRITICAL_END
2794
2795 rc = hotkey_mask_set((hotkey_user_mask | hotkey_driver_mask) &
2796 ~hotkey_source_mask);
2797 hotkey_poll_setup(true);
2798
2799 /* check if events needed by the driver got disabled */
2800 r_ev = hotkey_driver_mask & ~(hotkey_acpi_mask & hotkey_all_mask)
2801 & ~hotkey_source_mask & TPACPI_HKEY_NVRAM_KNOWN_MASK;
2802
2803 mutex_unlock(&hotkey_mutex);
2804
2805 if (rc < 0)
2806 printk(TPACPI_ERR "hotkey_source_mask: failed to update the"
2807 "firmware event mask!\n");
2808
2809 if (r_ev)
2810 printk(TPACPI_NOTICE "hotkey_source_mask: "
2811 "some important events were disabled: "
2812 "0x%04x\n", r_ev);
2813
2814 tpacpi_disclose_usertask("hotkey_source_mask", "set to 0x%08lx\n", t);
2815
2816 return (rc < 0) ? rc : count;
2817 }
2818
2819 static struct device_attribute dev_attr_hotkey_source_mask =
2820 __ATTR(hotkey_source_mask, S_IWUSR | S_IRUGO,
2821 hotkey_source_mask_show, hotkey_source_mask_store);
2822
2823 /* sysfs hotkey hotkey_poll_freq --------------------------------------- */
2824 static ssize_t hotkey_poll_freq_show(struct device *dev,
2825 struct device_attribute *attr,
2826 char *buf)
2827 {
2828 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_poll_freq);
2829 }
2830
2831 static ssize_t hotkey_poll_freq_store(struct device *dev,
2832 struct device_attribute *attr,
2833 const char *buf, size_t count)
2834 {
2835 unsigned long t;
2836
2837 if (parse_strtoul(buf, 25, &t))
2838 return -EINVAL;
2839
2840 if (mutex_lock_killable(&hotkey_mutex))
2841 return -ERESTARTSYS;
2842
2843 hotkey_poll_set_freq(t);
2844 hotkey_poll_setup(true);
2845
2846 mutex_unlock(&hotkey_mutex);
2847
2848 tpacpi_disclose_usertask("hotkey_poll_freq", "set to %lu\n", t);
2849
2850 return count;
2851 }
2852
2853 static struct device_attribute dev_attr_hotkey_poll_freq =
2854 __ATTR(hotkey_poll_freq, S_IWUSR | S_IRUGO,
2855 hotkey_poll_freq_show, hotkey_poll_freq_store);
2856
2857 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2858
2859 /* sysfs hotkey radio_sw (pollable) ------------------------------------ */
2860 static ssize_t hotkey_radio_sw_show(struct device *dev,
2861 struct device_attribute *attr,
2862 char *buf)
2863 {
2864 int res;
2865 res = hotkey_get_wlsw();
2866 if (res < 0)
2867 return res;
2868
2869 /* Opportunistic update */
2870 tpacpi_rfk_update_hwblock_state((res == TPACPI_RFK_RADIO_OFF));
2871
2872 return snprintf(buf, PAGE_SIZE, "%d\n",
2873 (res == TPACPI_RFK_RADIO_OFF) ? 0 : 1);
2874 }
2875
2876 static struct device_attribute dev_attr_hotkey_radio_sw =
2877 __ATTR(hotkey_radio_sw, S_IRUGO, hotkey_radio_sw_show, NULL);
2878
2879 static void hotkey_radio_sw_notify_change(void)
2880 {
2881 if (tp_features.hotkey_wlsw)
2882 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2883 "hotkey_radio_sw");
2884 }
2885
2886 /* sysfs hotkey tablet mode (pollable) --------------------------------- */
2887 static ssize_t hotkey_tablet_mode_show(struct device *dev,
2888 struct device_attribute *attr,
2889 char *buf)
2890 {
2891 int res, s;
2892 res = hotkey_get_tablet_mode(&s);
2893 if (res < 0)
2894 return res;
2895
2896 return snprintf(buf, PAGE_SIZE, "%d\n", !!s);
2897 }
2898
2899 static struct device_attribute dev_attr_hotkey_tablet_mode =
2900 __ATTR(hotkey_tablet_mode, S_IRUGO, hotkey_tablet_mode_show, NULL);
2901
2902 static void hotkey_tablet_mode_notify_change(void)
2903 {
2904 if (tp_features.hotkey_tablet)
2905 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2906 "hotkey_tablet_mode");
2907 }
2908
2909 /* sysfs hotkey report_mode -------------------------------------------- */
2910 static ssize_t hotkey_report_mode_show(struct device *dev,
2911 struct device_attribute *attr,
2912 char *buf)
2913 {
2914 return snprintf(buf, PAGE_SIZE, "%d\n",
2915 (hotkey_report_mode != 0) ? hotkey_report_mode : 1);
2916 }
2917
2918 static struct device_attribute dev_attr_hotkey_report_mode =
2919 __ATTR(hotkey_report_mode, S_IRUGO, hotkey_report_mode_show, NULL);
2920
2921 /* sysfs wakeup reason (pollable) -------------------------------------- */
2922 static ssize_t hotkey_wakeup_reason_show(struct device *dev,
2923 struct device_attribute *attr,
2924 char *buf)
2925 {
2926 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_wakeup_reason);
2927 }
2928
2929 static struct device_attribute dev_attr_hotkey_wakeup_reason =
2930 __ATTR(wakeup_reason, S_IRUGO, hotkey_wakeup_reason_show, NULL);
2931
2932 static void hotkey_wakeup_reason_notify_change(void)
2933 {
2934 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2935 "wakeup_reason");
2936 }
2937
2938 /* sysfs wakeup hotunplug_complete (pollable) -------------------------- */
2939 static ssize_t hotkey_wakeup_hotunplug_complete_show(struct device *dev,
2940 struct device_attribute *attr,
2941 char *buf)
2942 {
2943 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_autosleep_ack);
2944 }
2945
2946 static struct device_attribute dev_attr_hotkey_wakeup_hotunplug_complete =
2947 __ATTR(wakeup_hotunplug_complete, S_IRUGO,
2948 hotkey_wakeup_hotunplug_complete_show, NULL);
2949
2950 static void hotkey_wakeup_hotunplug_complete_notify_change(void)
2951 {
2952 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2953 "wakeup_hotunplug_complete");
2954 }
2955
2956 /* --------------------------------------------------------------------- */
2957
2958 static struct attribute *hotkey_attributes[] __initdata = {
2959 &dev_attr_hotkey_enable.attr,
2960 &dev_attr_hotkey_bios_enabled.attr,
2961 &dev_attr_hotkey_bios_mask.attr,
2962 &dev_attr_hotkey_report_mode.attr,
2963 &dev_attr_hotkey_wakeup_reason.attr,
2964 &dev_attr_hotkey_wakeup_hotunplug_complete.attr,
2965 &dev_attr_hotkey_mask.attr,
2966 &dev_attr_hotkey_all_mask.attr,
2967 &dev_attr_hotkey_recommended_mask.attr,
2968 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2969 &dev_attr_hotkey_source_mask.attr,
2970 &dev_attr_hotkey_poll_freq.attr,
2971 #endif
2972 };
2973
2974 /*
2975 * Sync both the hw and sw blocking state of all switches
2976 */
2977 static void tpacpi_send_radiosw_update(void)
2978 {
2979 int wlsw;
2980
2981 /*
2982 * We must sync all rfkill controllers *before* issuing any
2983 * rfkill input events, or we will race the rfkill core input
2984 * handler.
2985 *
2986 * tpacpi_inputdev_send_mutex works as a syncronization point
2987 * for the above.
2988 *
2989 * We optimize to avoid numerous calls to hotkey_get_wlsw.
2990 */
2991
2992 wlsw = hotkey_get_wlsw();
2993
2994 /* Sync hw blocking state first if it is hw-blocked */
2995 if (wlsw == TPACPI_RFK_RADIO_OFF)
2996 tpacpi_rfk_update_hwblock_state(true);
2997
2998 /* Sync sw blocking state */
2999 tpacpi_rfk_update_swstate_all();
3000
3001 /* Sync hw blocking state last if it is hw-unblocked */
3002 if (wlsw == TPACPI_RFK_RADIO_ON)
3003 tpacpi_rfk_update_hwblock_state(false);
3004
3005 /* Issue rfkill input event for WLSW switch */
3006 if (!(wlsw < 0)) {
3007 mutex_lock(&tpacpi_inputdev_send_mutex);
3008
3009 input_report_switch(tpacpi_inputdev,
3010 SW_RFKILL_ALL, (wlsw > 0));
3011 input_sync(tpacpi_inputdev);
3012
3013 mutex_unlock(&tpacpi_inputdev_send_mutex);
3014 }
3015
3016 /*
3017 * this can be unconditional, as we will poll state again
3018 * if userspace uses the notify to read data
3019 */
3020 hotkey_radio_sw_notify_change();
3021 }
3022
3023 static void hotkey_exit(void)
3024 {
3025 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
3026 mutex_lock(&hotkey_mutex);
3027 hotkey_poll_stop_sync();
3028 mutex_unlock(&hotkey_mutex);
3029 #endif
3030
3031 if (hotkey_dev_attributes)
3032 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
3033
3034 kfree(hotkey_keycode_map);
3035
3036 dbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_HKEY,
3037 "restoring original HKEY status and mask\n");
3038 /* yes, there is a bitwise or below, we want the
3039 * functions to be called even if one of them fail */
3040 if (((tp_features.hotkey_mask &&
3041 hotkey_mask_set(hotkey_orig_mask)) |
3042 hotkey_status_set(false)) != 0)
3043 printk(TPACPI_ERR
3044 "failed to restore hot key mask "
3045 "to BIOS defaults\n");
3046 }
3047
3048 static void __init hotkey_unmap(const unsigned int scancode)
3049 {
3050 if (hotkey_keycode_map[scancode] != KEY_RESERVED) {
3051 clear_bit(hotkey_keycode_map[scancode],
3052 tpacpi_inputdev->keybit);
3053 hotkey_keycode_map[scancode] = KEY_RESERVED;
3054 }
3055 }
3056
3057 /*
3058 * HKEY quirks:
3059 * TPACPI_HK_Q_INIMASK: Supports FN+F3,FN+F4,FN+F12
3060 */
3061
3062 #define TPACPI_HK_Q_INIMASK 0x0001
3063
3064 static const struct tpacpi_quirk tpacpi_hotkey_qtable[] __initconst = {
3065 TPACPI_Q_IBM('I', 'H', TPACPI_HK_Q_INIMASK), /* 600E */
3066 TPACPI_Q_IBM('I', 'N', TPACPI_HK_Q_INIMASK), /* 600E */
3067 TPACPI_Q_IBM('I', 'D', TPACPI_HK_Q_INIMASK), /* 770, 770E, 770ED */
3068 TPACPI_Q_IBM('I', 'W', TPACPI_HK_Q_INIMASK), /* A20m */
3069 TPACPI_Q_IBM('I', 'V', TPACPI_HK_Q_INIMASK), /* A20p */
3070 TPACPI_Q_IBM('1', '0', TPACPI_HK_Q_INIMASK), /* A21e, A22e */
3071 TPACPI_Q_IBM('K', 'U', TPACPI_HK_Q_INIMASK), /* A21e */
3072 TPACPI_Q_IBM('K', 'X', TPACPI_HK_Q_INIMASK), /* A21m, A22m */
3073 TPACPI_Q_IBM('K', 'Y', TPACPI_HK_Q_INIMASK), /* A21p, A22p */
3074 TPACPI_Q_IBM('1', 'B', TPACPI_HK_Q_INIMASK), /* A22e */
3075 TPACPI_Q_IBM('1', '3', TPACPI_HK_Q_INIMASK), /* A22m */
3076 TPACPI_Q_IBM('1', 'E', TPACPI_HK_Q_INIMASK), /* A30/p (0) */
3077 TPACPI_Q_IBM('1', 'C', TPACPI_HK_Q_INIMASK), /* R30 */
3078 TPACPI_Q_IBM('1', 'F', TPACPI_HK_Q_INIMASK), /* R31 */
3079 TPACPI_Q_IBM('I', 'Y', TPACPI_HK_Q_INIMASK), /* T20 */
3080 TPACPI_Q_IBM('K', 'Z', TPACPI_HK_Q_INIMASK), /* T21 */
3081 TPACPI_Q_IBM('1', '6', TPACPI_HK_Q_INIMASK), /* T22 */
3082 TPACPI_Q_IBM('I', 'Z', TPACPI_HK_Q_INIMASK), /* X20, X21 */
3083 TPACPI_Q_IBM('1', 'D', TPACPI_HK_Q_INIMASK), /* X22, X23, X24 */
3084 };
3085
3086 static int __init hotkey_init(struct ibm_init_struct *iibm)
3087 {
3088 /* Requirements for changing the default keymaps:
3089 *
3090 * 1. Many of the keys are mapped to KEY_RESERVED for very
3091 * good reasons. Do not change them unless you have deep
3092 * knowledge on the IBM and Lenovo ThinkPad firmware for
3093 * the various ThinkPad models. The driver behaves
3094 * differently for KEY_RESERVED: such keys have their
3095 * hot key mask *unset* in mask_recommended, and also
3096 * in the initial hot key mask programmed into the
3097 * firmware at driver load time, which means the firm-
3098 * ware may react very differently if you change them to
3099 * something else;
3100 *
3101 * 2. You must be subscribed to the linux-thinkpad and
3102 * ibm-acpi-devel mailing lists, and you should read the
3103 * list archives since 2007 if you want to change the
3104 * keymaps. This requirement exists so that you will
3105 * know the past history of problems with the thinkpad-
3106 * acpi driver keymaps, and also that you will be
3107 * listening to any bug reports;
3108 *
3109 * 3. Do not send thinkpad-acpi specific patches directly to
3110 * for merging, *ever*. Send them to the linux-acpi
3111 * mailinglist for comments. Merging is to be done only
3112 * through acpi-test and the ACPI maintainer.
3113 *
3114 * If the above is too much to ask, don't change the keymap.
3115 * Ask the thinkpad-acpi maintainer to do it, instead.
3116 */
3117 static u16 ibm_keycode_map[] __initdata = {
3118 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
3119 KEY_FN_F1, KEY_FN_F2, KEY_COFFEE, KEY_SLEEP,
3120 KEY_WLAN, KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
3121 KEY_FN_F9, KEY_FN_F10, KEY_FN_F11, KEY_SUSPEND,
3122
3123 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
3124 KEY_UNKNOWN, /* 0x0C: FN+BACKSPACE */
3125 KEY_UNKNOWN, /* 0x0D: FN+INSERT */
3126 KEY_UNKNOWN, /* 0x0E: FN+DELETE */
3127
3128 /* brightness: firmware always reacts to them */
3129 KEY_RESERVED, /* 0x0F: FN+HOME (brightness up) */
3130 KEY_RESERVED, /* 0x10: FN+END (brightness down) */
3131
3132 /* Thinklight: firmware always react to it */
3133 KEY_RESERVED, /* 0x11: FN+PGUP (thinklight toggle) */
3134
3135 KEY_UNKNOWN, /* 0x12: FN+PGDOWN */
3136 KEY_ZOOM, /* 0x13: FN+SPACE (zoom) */
3137
3138 /* Volume: firmware always react to it and reprograms
3139 * the built-in *extra* mixer. Never map it to control
3140 * another mixer by default. */
3141 KEY_RESERVED, /* 0x14: VOLUME UP */
3142 KEY_RESERVED, /* 0x15: VOLUME DOWN */
3143 KEY_RESERVED, /* 0x16: MUTE */
3144
3145 KEY_VENDOR, /* 0x17: Thinkpad/AccessIBM/Lenovo */
3146
3147 /* (assignments unknown, please report if found) */
3148 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3149 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3150 };
3151 static u16 lenovo_keycode_map[] __initdata = {
3152 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
3153 KEY_FN_F1, KEY_COFFEE, KEY_BATTERY, KEY_SLEEP,
3154 KEY_WLAN, KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
3155 KEY_FN_F9, KEY_FN_F10, KEY_FN_F11, KEY_SUSPEND,
3156
3157 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
3158 KEY_UNKNOWN, /* 0x0C: FN+BACKSPACE */
3159 KEY_UNKNOWN, /* 0x0D: FN+INSERT */
3160 KEY_UNKNOWN, /* 0x0E: FN+DELETE */
3161
3162 /* These should be enabled --only-- when ACPI video
3163 * is disabled (i.e. in "vendor" mode), and are handled
3164 * in a special way by the init code */
3165 KEY_BRIGHTNESSUP, /* 0x0F: FN+HOME (brightness up) */
3166 KEY_BRIGHTNESSDOWN, /* 0x10: FN+END (brightness down) */
3167
3168 KEY_RESERVED, /* 0x11: FN+PGUP (thinklight toggle) */
3169
3170 KEY_UNKNOWN, /* 0x12: FN+PGDOWN */
3171 KEY_ZOOM, /* 0x13: FN+SPACE (zoom) */
3172
3173 /* Volume: z60/z61, T60 (BIOS version?): firmware always
3174 * react to it and reprograms the built-in *extra* mixer.
3175 * Never map it to control another mixer by default.
3176 *
3177 * T60?, T61, R60?, R61: firmware and EC tries to send
3178 * these over the regular keyboard, so these are no-ops,
3179 * but there are still weird bugs re. MUTE, so do not
3180 * change unless you get test reports from all Lenovo
3181 * models. May cause the BIOS to interfere with the
3182 * HDA mixer.
3183 */
3184 KEY_RESERVED, /* 0x14: VOLUME UP */
3185 KEY_RESERVED, /* 0x15: VOLUME DOWN */
3186 KEY_RESERVED, /* 0x16: MUTE */
3187
3188 KEY_VENDOR, /* 0x17: Thinkpad/AccessIBM/Lenovo */
3189
3190 /* (assignments unknown, please report if found) */
3191 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3192 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3193 };
3194
3195 #define TPACPI_HOTKEY_MAP_LEN ARRAY_SIZE(ibm_keycode_map)
3196 #define TPACPI_HOTKEY_MAP_SIZE sizeof(ibm_keycode_map)
3197 #define TPACPI_HOTKEY_MAP_TYPESIZE sizeof(ibm_keycode_map[0])
3198
3199 int res, i;
3200 int status;
3201 int hkeyv;
3202 bool radiosw_state = false;
3203 bool tabletsw_state = false;
3204
3205 unsigned long quirks;
3206
3207 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3208 "initializing hotkey subdriver\n");
3209
3210 BUG_ON(!tpacpi_inputdev);
3211 BUG_ON(tpacpi_inputdev->open != NULL ||
3212 tpacpi_inputdev->close != NULL);
3213
3214 TPACPI_ACPIHANDLE_INIT(hkey);
3215 mutex_init(&hotkey_mutex);
3216
3217 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
3218 mutex_init(&hotkey_thread_mutex);
3219 mutex_init(&hotkey_thread_data_mutex);
3220 #endif
3221
3222 /* hotkey not supported on 570 */
3223 tp_features.hotkey = hkey_handle != NULL;
3224
3225 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3226 "hotkeys are %s\n",
3227 str_supported(tp_features.hotkey));
3228
3229 if (!tp_features.hotkey)
3230 return 1;
3231
3232 quirks = tpacpi_check_quirks(tpacpi_hotkey_qtable,
3233 ARRAY_SIZE(tpacpi_hotkey_qtable));
3234
3235 tpacpi_disable_brightness_delay();
3236
3237 /* MUST have enough space for all attributes to be added to
3238 * hotkey_dev_attributes */
3239 hotkey_dev_attributes = create_attr_set(
3240 ARRAY_SIZE(hotkey_attributes) + 2,
3241 NULL);
3242 if (!hotkey_dev_attributes)
3243 return -ENOMEM;
3244 res = add_many_to_attr_set(hotkey_dev_attributes,
3245 hotkey_attributes,
3246 ARRAY_SIZE(hotkey_attributes));
3247 if (res)
3248 goto err_exit;
3249
3250 /* mask not supported on 600e/x, 770e, 770x, A21e, A2xm/p,
3251 A30, R30, R31, T20-22, X20-21, X22-24. Detected by checking
3252 for HKEY interface version 0x100 */
3253 if (acpi_evalf(hkey_handle, &hkeyv, "MHKV", "qd")) {
3254 if ((hkeyv >> 8) != 1) {
3255 printk(TPACPI_ERR "unknown version of the "
3256 "HKEY interface: 0x%x\n", hkeyv);
3257 printk(TPACPI_ERR "please report this to %s\n",
3258 TPACPI_MAIL);
3259 } else {
3260 /*
3261 * MHKV 0x100 in A31, R40, R40e,
3262 * T4x, X31, and later
3263 */
3264 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3265 "firmware HKEY interface version: 0x%x\n",
3266 hkeyv);
3267
3268 /* Paranoia check AND init hotkey_all_mask */
3269 if (!acpi_evalf(hkey_handle, &hotkey_all_mask,
3270 "MHKA", "qd")) {
3271 printk(TPACPI_ERR
3272 "missing MHKA handler, "
3273 "please report this to %s\n",
3274 TPACPI_MAIL);
3275 /* Fallback: pre-init for FN+F3,F4,F12 */
3276 hotkey_all_mask = 0x080cU;
3277 } else {
3278 tp_features.hotkey_mask = 1;
3279 }
3280 }
3281 }
3282
3283 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3284 "hotkey masks are %s\n",
3285 str_supported(tp_features.hotkey_mask));
3286
3287 /* Init hotkey_all_mask if not initialized yet */
3288 if (!tp_features.hotkey_mask && !hotkey_all_mask &&
3289 (quirks & TPACPI_HK_Q_INIMASK))
3290 hotkey_all_mask = 0x080cU; /* FN+F12, FN+F4, FN+F3 */
3291
3292 /* Init hotkey_acpi_mask and hotkey_orig_mask */
3293 if (tp_features.hotkey_mask) {
3294 /* hotkey_source_mask *must* be zero for
3295 * the first hotkey_mask_get to return hotkey_orig_mask */
3296 res = hotkey_mask_get();
3297 if (res)
3298 goto err_exit;
3299
3300 hotkey_orig_mask = hotkey_acpi_mask;
3301 } else {
3302 hotkey_orig_mask = hotkey_all_mask;
3303 hotkey_acpi_mask = hotkey_all_mask;
3304 }
3305
3306 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3307 if (dbg_wlswemul) {
3308 tp_features.hotkey_wlsw = 1;
3309 radiosw_state = !!tpacpi_wlsw_emulstate;
3310 printk(TPACPI_INFO
3311 "radio switch emulation enabled\n");
3312 } else
3313 #endif
3314 /* Not all thinkpads have a hardware radio switch */
3315 if (acpi_evalf(hkey_handle, &status, "WLSW", "qd")) {
3316 tp_features.hotkey_wlsw = 1;
3317 radiosw_state = !!status;
3318 printk(TPACPI_INFO
3319 "radio switch found; radios are %s\n",
3320 enabled(status, 0));
3321 }
3322 if (tp_features.hotkey_wlsw)
3323 res = add_to_attr_set(hotkey_dev_attributes,
3324 &dev_attr_hotkey_radio_sw.attr);
3325
3326 /* For X41t, X60t, X61t Tablets... */
3327 if (!res && acpi_evalf(hkey_handle, &status, "MHKG", "qd")) {
3328 tp_features.hotkey_tablet = 1;
3329 tabletsw_state = !!(status & TP_HOTKEY_TABLET_MASK);
3330 printk(TPACPI_INFO
3331 "possible tablet mode switch found; "
3332 "ThinkPad in %s mode\n",
3333 (tabletsw_state) ? "tablet" : "laptop");
3334 res = add_to_attr_set(hotkey_dev_attributes,
3335 &dev_attr_hotkey_tablet_mode.attr);
3336 }
3337
3338 if (!res)
3339 res = register_attr_set_with_sysfs(
3340 hotkey_dev_attributes,
3341 &tpacpi_pdev->dev.kobj);
3342 if (res)
3343 goto err_exit;
3344
3345 /* Set up key map */
3346
3347 hotkey_keycode_map = kmalloc(TPACPI_HOTKEY_MAP_SIZE,
3348 GFP_KERNEL);
3349 if (!hotkey_keycode_map) {
3350 printk(TPACPI_ERR
3351 "failed to allocate memory for key map\n");
3352 res = -ENOMEM;
3353 goto err_exit;
3354 }
3355
3356 if (thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO) {
3357 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3358 "using Lenovo default hot key map\n");
3359 memcpy(hotkey_keycode_map, &lenovo_keycode_map,
3360 TPACPI_HOTKEY_MAP_SIZE);
3361 } else {
3362 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3363 "using IBM default hot key map\n");
3364 memcpy(hotkey_keycode_map, &ibm_keycode_map,
3365 TPACPI_HOTKEY_MAP_SIZE);
3366 }
3367
3368 input_set_capability(tpacpi_inputdev, EV_MSC, MSC_SCAN);
3369 tpacpi_inputdev->keycodesize = TPACPI_HOTKEY_MAP_TYPESIZE;
3370 tpacpi_inputdev->keycodemax = TPACPI_HOTKEY_MAP_LEN;
3371 tpacpi_inputdev->keycode = hotkey_keycode_map;
3372 for (i = 0; i < TPACPI_HOTKEY_MAP_LEN; i++) {
3373 if (hotkey_keycode_map[i] != KEY_RESERVED) {
3374 input_set_capability(tpacpi_inputdev, EV_KEY,
3375 hotkey_keycode_map[i]);
3376 } else {
3377 if (i < sizeof(hotkey_reserved_mask)*8)
3378 hotkey_reserved_mask |= 1 << i;
3379 }
3380 }
3381
3382 if (tp_features.hotkey_wlsw) {
3383 input_set_capability(tpacpi_inputdev, EV_SW, SW_RFKILL_ALL);
3384 input_report_switch(tpacpi_inputdev,
3385 SW_RFKILL_ALL, radiosw_state);
3386 }
3387 if (tp_features.hotkey_tablet) {
3388 input_set_capability(tpacpi_inputdev, EV_SW, SW_TABLET_MODE);
3389 input_report_switch(tpacpi_inputdev,
3390 SW_TABLET_MODE, tabletsw_state);
3391 }
3392
3393 /* Do not issue duplicate brightness change events to
3394 * userspace */
3395 if (!tp_features.bright_acpimode)
3396 /* update bright_acpimode... */
3397 tpacpi_check_std_acpi_brightness_support();
3398
3399 if (tp_features.bright_acpimode && acpi_video_backlight_support()) {
3400 printk(TPACPI_INFO
3401 "This ThinkPad has standard ACPI backlight "
3402 "brightness control, supported by the ACPI "
3403 "video driver\n");
3404 printk(TPACPI_NOTICE
3405 "Disabling thinkpad-acpi brightness events "
3406 "by default...\n");
3407
3408 /* Disable brightness up/down on Lenovo thinkpads when
3409 * ACPI is handling them, otherwise it is plain impossible
3410 * for userspace to do something even remotely sane */
3411 hotkey_reserved_mask |=
3412 (1 << TP_ACPI_HOTKEYSCAN_FNHOME)
3413 | (1 << TP_ACPI_HOTKEYSCAN_FNEND);
3414 hotkey_unmap(TP_ACPI_HOTKEYSCAN_FNHOME);
3415 hotkey_unmap(TP_ACPI_HOTKEYSCAN_FNEND);
3416 }
3417
3418 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
3419 hotkey_source_mask = TPACPI_HKEY_NVRAM_GOOD_MASK
3420 & ~hotkey_all_mask
3421 & ~hotkey_reserved_mask;
3422
3423 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3424 "hotkey source mask 0x%08x, polling freq %u\n",
3425 hotkey_source_mask, hotkey_poll_freq);
3426 #endif
3427
3428 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3429 "enabling firmware HKEY event interface...\n");
3430 res = hotkey_status_set(true);
3431 if (res) {
3432 hotkey_exit();
3433 return res;
3434 }
3435 res = hotkey_mask_set(((hotkey_all_mask & ~hotkey_reserved_mask)
3436 | hotkey_driver_mask)
3437 & ~hotkey_source_mask);
3438 if (res < 0 && res != -ENXIO) {
3439 hotkey_exit();
3440 return res;
3441 }
3442 hotkey_user_mask = (hotkey_acpi_mask | hotkey_source_mask)
3443 & ~hotkey_reserved_mask;
3444 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3445 "initial masks: user=0x%08x, fw=0x%08x, poll=0x%08x\n",
3446 hotkey_user_mask, hotkey_acpi_mask, hotkey_source_mask);
3447
3448 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3449 "legacy ibm/hotkey event reporting over procfs %s\n",
3450 (hotkey_report_mode < 2) ?
3451 "enabled" : "disabled");
3452
3453 tpacpi_inputdev->open = &hotkey_inputdev_open;
3454 tpacpi_inputdev->close = &hotkey_inputdev_close;
3455
3456 hotkey_poll_setup_safe(true);
3457
3458 return 0;
3459
3460 err_exit:
3461 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
3462 hotkey_dev_attributes = NULL;
3463
3464 return (res < 0)? res : 1;
3465 }
3466
3467 static bool hotkey_notify_hotkey(const u32 hkey,
3468 bool *send_acpi_ev,
3469 bool *ignore_acpi_ev)
3470 {
3471 /* 0x1000-0x1FFF: key presses */
3472 unsigned int scancode = hkey & 0xfff;
3473 *send_acpi_ev = true;
3474 *ignore_acpi_ev = false;
3475
3476 if (scancode > 0 && scancode < 0x21) {
3477 scancode--;
3478 if (!(hotkey_source_mask & (1 << scancode))) {
3479 tpacpi_input_send_key_masked(scancode);
3480 *send_acpi_ev = false;
3481 } else {
3482 *ignore_acpi_ev = true;
3483 }
3484 return true;
3485 }
3486 return false;
3487 }
3488
3489 static bool hotkey_notify_wakeup(const u32 hkey,
3490 bool *send_acpi_ev,
3491 bool *ignore_acpi_ev)
3492 {
3493 /* 0x2000-0x2FFF: Wakeup reason */
3494 *send_acpi_ev = true;
3495 *ignore_acpi_ev = false;
3496
3497 switch (hkey) {
3498 case TP_HKEY_EV_WKUP_S3_UNDOCK: /* suspend, undock */
3499 case TP_HKEY_EV_WKUP_S4_UNDOCK: /* hibernation, undock */
3500 hotkey_wakeup_reason = TP_ACPI_WAKEUP_UNDOCK;
3501 *ignore_acpi_ev = true;
3502 break;
3503
3504 case TP_HKEY_EV_WKUP_S3_BAYEJ: /* suspend, bay eject */
3505 case TP_HKEY_EV_WKUP_S4_BAYEJ: /* hibernation, bay eject */
3506 hotkey_wakeup_reason = TP_ACPI_WAKEUP_BAYEJ;
3507 *ignore_acpi_ev = true;
3508 break;
3509
3510 case TP_HKEY_EV_WKUP_S3_BATLOW: /* Battery on critical low level/S3 */
3511 case TP_HKEY_EV_WKUP_S4_BATLOW: /* Battery on critical low level/S4 */
3512 printk(TPACPI_ALERT
3513 "EMERGENCY WAKEUP: battery almost empty\n");
3514 /* how to auto-heal: */
3515 /* 2313: woke up from S3, go to S4/S5 */
3516 /* 2413: woke up from S4, go to S5 */
3517 break;
3518
3519 default:
3520 return false;
3521 }
3522
3523 if (hotkey_wakeup_reason != TP_ACPI_WAKEUP_NONE) {
3524 printk(TPACPI_INFO
3525 "woke up due to a hot-unplug "
3526 "request...\n");
3527 hotkey_wakeup_reason_notify_change();
3528 }
3529 return true;
3530 }
3531
3532 static bool hotkey_notify_usrevent(const u32 hkey,
3533 bool *send_acpi_ev,
3534 bool *ignore_acpi_ev)
3535 {
3536 /* 0x5000-0x5FFF: human interface helpers */
3537 *send_acpi_ev = true;
3538 *ignore_acpi_ev = false;
3539
3540 switch (hkey) {
3541 case TP_HKEY_EV_PEN_INSERTED: /* X61t: tablet pen inserted into bay */
3542 case TP_HKEY_EV_PEN_REMOVED: /* X61t: tablet pen removed from bay */
3543 return true;
3544
3545 case TP_HKEY_EV_TABLET_TABLET: /* X41t-X61t: tablet mode */
3546 case TP_HKEY_EV_TABLET_NOTEBOOK: /* X41t-X61t: normal mode */
3547 tpacpi_input_send_tabletsw();
3548 hotkey_tablet_mode_notify_change();
3549 *send_acpi_ev = false;
3550 return true;
3551
3552 case TP_HKEY_EV_LID_CLOSE: /* Lid closed */
3553 case TP_HKEY_EV_LID_OPEN: /* Lid opened */
3554 case TP_HKEY_EV_BRGHT_CHANGED: /* brightness changed */
3555 /* do not propagate these events */
3556 *ignore_acpi_ev = true;
3557 return true;
3558
3559 default:
3560 return false;
3561 }
3562 }
3563
3564 static void thermal_dump_all_sensors(void);
3565
3566 static bool hotkey_notify_thermal(const u32 hkey,
3567 bool *send_acpi_ev,
3568 bool *ignore_acpi_ev)
3569 {
3570 bool known = true;
3571
3572 /* 0x6000-0x6FFF: thermal alarms */
3573 *send_acpi_ev = true;
3574 *ignore_acpi_ev = false;
3575
3576 switch (hkey) {
3577 case TP_HKEY_EV_THM_TABLE_CHANGED:
3578 printk(TPACPI_INFO
3579 "EC reports that Thermal Table has changed\n");
3580 /* recommended action: do nothing, we don't have
3581 * Lenovo ATM information */
3582 return true;
3583 case TP_HKEY_EV_ALARM_BAT_HOT:
3584 printk(TPACPI_CRIT
3585 "THERMAL ALARM: battery is too hot!\n");
3586 /* recommended action: warn user through gui */
3587 break;
3588 case TP_HKEY_EV_ALARM_BAT_XHOT:
3589 printk(TPACPI_ALERT
3590 "THERMAL EMERGENCY: battery is extremely hot!\n");
3591 /* recommended action: immediate sleep/hibernate */
3592 break;
3593 case TP_HKEY_EV_ALARM_SENSOR_HOT:
3594 printk(TPACPI_CRIT
3595 "THERMAL ALARM: "
3596 "a sensor reports something is too hot!\n");
3597 /* recommended action: warn user through gui, that */
3598 /* some internal component is too hot */
3599 break;
3600 case TP_HKEY_EV_ALARM_SENSOR_XHOT:
3601 printk(TPACPI_ALERT
3602 "THERMAL EMERGENCY: "
3603 "a sensor reports something is extremely hot!\n");
3604 /* recommended action: immediate sleep/hibernate */
3605 break;
3606 default:
3607 printk(TPACPI_ALERT
3608 "THERMAL ALERT: unknown thermal alarm received\n");
3609 known = false;
3610 }
3611
3612 thermal_dump_all_sensors();
3613
3614 return known;
3615 }
3616
3617 static void hotkey_notify(struct ibm_struct *ibm, u32 event)
3618 {
3619 u32 hkey;
3620 bool send_acpi_ev;
3621 bool ignore_acpi_ev;
3622 bool known_ev;
3623
3624 if (event != 0x80) {
3625 printk(TPACPI_ERR
3626 "unknown HKEY notification event %d\n", event);
3627 /* forward it to userspace, maybe it knows how to handle it */
3628 acpi_bus_generate_netlink_event(
3629 ibm->acpi->device->pnp.device_class,
3630 dev_name(&ibm->acpi->device->dev),
3631 event, 0);
3632 return;
3633 }
3634
3635 while (1) {
3636 if (!acpi_evalf(hkey_handle, &hkey, "MHKP", "d")) {
3637 printk(TPACPI_ERR "failed to retrieve HKEY event\n");
3638 return;
3639 }
3640
3641 if (hkey == 0) {
3642 /* queue empty */
3643 return;
3644 }
3645
3646 send_acpi_ev = true;
3647 ignore_acpi_ev = false;
3648
3649 switch (hkey >> 12) {
3650 case 1:
3651 /* 0x1000-0x1FFF: key presses */
3652 known_ev = hotkey_notify_hotkey(hkey, &send_acpi_ev,
3653 &ignore_acpi_ev);
3654 break;
3655 case 2:
3656 /* 0x2000-0x2FFF: Wakeup reason */
3657 known_ev = hotkey_notify_wakeup(hkey, &send_acpi_ev,
3658 &ignore_acpi_ev);
3659 break;
3660 case 3:
3661 /* 0x3000-0x3FFF: bay-related wakeups */
3662 switch (hkey) {
3663 case TP_HKEY_EV_BAYEJ_ACK:
3664 hotkey_autosleep_ack = 1;
3665 printk(TPACPI_INFO
3666 "bay ejected\n");
3667 hotkey_wakeup_hotunplug_complete_notify_change();
3668 known_ev = true;
3669 break;
3670 case TP_HKEY_EV_OPTDRV_EJ:
3671 /* FIXME: kick libata if SATA link offline */
3672 known_ev = true;
3673 break;
3674 default:
3675 known_ev = false;
3676 }
3677 break;
3678 case 4:
3679 /* 0x4000-0x4FFF: dock-related wakeups */
3680 if (hkey == TP_HKEY_EV_UNDOCK_ACK) {
3681 hotkey_autosleep_ack = 1;
3682 printk(TPACPI_INFO
3683 "undocked\n");
3684 hotkey_wakeup_hotunplug_complete_notify_change();
3685 known_ev = true;
3686 } else {
3687 known_ev = false;
3688 }
3689 break;
3690 case 5:
3691 /* 0x5000-0x5FFF: human interface helpers */
3692 known_ev = hotkey_notify_usrevent(hkey, &send_acpi_ev,
3693 &ignore_acpi_ev);
3694 break;
3695 case 6:
3696 /* 0x6000-0x6FFF: thermal alarms */
3697 known_ev = hotkey_notify_thermal(hkey, &send_acpi_ev,
3698 &ignore_acpi_ev);
3699 break;
3700 case 7:
3701 /* 0x7000-0x7FFF: misc */
3702 if (tp_features.hotkey_wlsw &&
3703 hkey == TP_HKEY_EV_RFKILL_CHANGED) {
3704 tpacpi_send_radiosw_update();
3705 send_acpi_ev = 0;
3706 known_ev = true;
3707 break;
3708 }
3709 /* fallthrough to default */
3710 default:
3711 known_ev = false;
3712 }
3713 if (!known_ev) {
3714 printk(TPACPI_NOTICE
3715 "unhandled HKEY event 0x%04x\n", hkey);
3716 printk(TPACPI_NOTICE
3717 "please report the conditions when this "
3718 "event happened to %s\n", TPACPI_MAIL);
3719 }
3720
3721 /* Legacy events */
3722 if (!ignore_acpi_ev &&
3723 (send_acpi_ev || hotkey_report_mode < 2)) {
3724 acpi_bus_generate_proc_event(ibm->acpi->device,
3725 event, hkey);
3726 }
3727
3728 /* netlink events */
3729 if (!ignore_acpi_ev && send_acpi_ev) {
3730 acpi_bus_generate_netlink_event(
3731 ibm->acpi->device->pnp.device_class,
3732 dev_name(&ibm->acpi->device->dev),
3733 event, hkey);
3734 }
3735 }
3736 }
3737
3738 static void hotkey_suspend(pm_message_t state)
3739 {
3740 /* Do these on suspend, we get the events on early resume! */
3741 hotkey_wakeup_reason = TP_ACPI_WAKEUP_NONE;
3742 hotkey_autosleep_ack = 0;
3743 }
3744
3745 static void hotkey_resume(void)
3746 {
3747 tpacpi_disable_brightness_delay();
3748
3749 if (hotkey_status_set(true) < 0 ||
3750 hotkey_mask_set(hotkey_acpi_mask) < 0)
3751 printk(TPACPI_ERR
3752 "error while attempting to reset the event "
3753 "firmware interface\n");
3754
3755 tpacpi_send_radiosw_update();
3756 hotkey_tablet_mode_notify_change();
3757 hotkey_wakeup_reason_notify_change();
3758 hotkey_wakeup_hotunplug_complete_notify_change();
3759 hotkey_poll_setup_safe(false);
3760 }
3761
3762 /* procfs -------------------------------------------------------------- */
3763 static int hotkey_read(struct seq_file *m)
3764 {
3765 int res, status;
3766
3767 if (!tp_features.hotkey) {
3768 seq_printf(m, "status:\t\tnot supported\n");
3769 return 0;
3770 }
3771
3772 if (mutex_lock_killable(&hotkey_mutex))
3773 return -ERESTARTSYS;
3774 res = hotkey_status_get(&status);
3775 if (!res)
3776 res = hotkey_mask_get();
3777 mutex_unlock(&hotkey_mutex);
3778 if (res)
3779 return res;
3780
3781 seq_printf(m, "status:\t\t%s\n", enabled(status, 0));
3782 if (hotkey_all_mask) {
3783 seq_printf(m, "mask:\t\t0x%08x\n", hotkey_user_mask);
3784 seq_printf(m, "commands:\tenable, disable, reset, <mask>\n");
3785 } else {
3786 seq_printf(m, "mask:\t\tnot supported\n");
3787 seq_printf(m, "commands:\tenable, disable, reset\n");
3788 }
3789
3790 return 0;
3791 }
3792
3793 static void hotkey_enabledisable_warn(bool enable)
3794 {
3795 tpacpi_log_usertask("procfs hotkey enable/disable");
3796 if (!WARN((tpacpi_lifecycle == TPACPI_LIFE_RUNNING || !enable),
3797 TPACPI_WARN
3798 "hotkey enable/disable functionality has been "
3799 "removed from the driver. Hotkeys are always "
3800 "enabled\n"))
3801 printk(TPACPI_ERR
3802 "Please remove the hotkey=enable module "
3803 "parameter, it is deprecated. Hotkeys are always "
3804 "enabled\n");
3805 }
3806
3807 static int hotkey_write(char *buf)
3808 {
3809 int res;
3810 u32 mask;
3811 char *cmd;
3812
3813 if (!tp_features.hotkey)
3814 return -ENODEV;
3815
3816 if (mutex_lock_killable(&hotkey_mutex))
3817 return -ERESTARTSYS;
3818
3819 mask = hotkey_user_mask;
3820
3821 res = 0;
3822 while ((cmd = next_cmd(&buf))) {
3823 if (strlencmp(cmd, "enable") == 0) {
3824 hotkey_enabledisable_warn(1);
3825 } else if (strlencmp(cmd, "disable") == 0) {
3826 hotkey_enabledisable_warn(0);
3827 res = -EPERM;
3828 } else if (strlencmp(cmd, "reset") == 0) {
3829 mask = (hotkey_all_mask | hotkey_source_mask)
3830 & ~hotkey_reserved_mask;
3831 } else if (sscanf(cmd, "0x%x", &mask) == 1) {
3832 /* mask set */
3833 } else if (sscanf(cmd, "%x", &mask) == 1) {
3834 /* mask set */
3835 } else {
3836 res = -EINVAL;
3837 goto errexit;
3838 }
3839 }
3840
3841 if (!res) {
3842 tpacpi_disclose_usertask("procfs hotkey",
3843 "set mask to 0x%08x\n", mask);
3844 res = hotkey_user_mask_set(mask);
3845 }
3846
3847 errexit:
3848 mutex_unlock(&hotkey_mutex);
3849 return res;
3850 }
3851
3852 static const struct acpi_device_id ibm_htk_device_ids[] = {
3853 {TPACPI_ACPI_HKEY_HID, 0},
3854 {"", 0},
3855 };
3856
3857 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver = {
3858 .hid = ibm_htk_device_ids,
3859 .notify = hotkey_notify,
3860 .handle = &hkey_handle,
3861 .type = ACPI_DEVICE_NOTIFY,
3862 };
3863
3864 static struct ibm_struct hotkey_driver_data = {
3865 .name = "hotkey",
3866 .read = hotkey_read,
3867 .write = hotkey_write,
3868 .exit = hotkey_exit,
3869 .resume = hotkey_resume,
3870 .suspend = hotkey_suspend,
3871 .acpi = &ibm_hotkey_acpidriver,
3872 };
3873
3874 /*************************************************************************
3875 * Bluetooth subdriver
3876 */
3877
3878 enum {
3879 /* ACPI GBDC/SBDC bits */
3880 TP_ACPI_BLUETOOTH_HWPRESENT = 0x01, /* Bluetooth hw available */
3881 TP_ACPI_BLUETOOTH_RADIOSSW = 0x02, /* Bluetooth radio enabled */
3882 TP_ACPI_BLUETOOTH_RESUMECTRL = 0x04, /* Bluetooth state at resume:
3883 0 = disable, 1 = enable */
3884 };
3885
3886 enum {
3887 /* ACPI \BLTH commands */
3888 TP_ACPI_BLTH_GET_ULTRAPORT_ID = 0x00, /* Get Ultraport BT ID */
3889 TP_ACPI_BLTH_GET_PWR_ON_RESUME = 0x01, /* Get power-on-resume state */
3890 TP_ACPI_BLTH_PWR_ON_ON_RESUME = 0x02, /* Resume powered on */
3891 TP_ACPI_BLTH_PWR_OFF_ON_RESUME = 0x03, /* Resume powered off */
3892 TP_ACPI_BLTH_SAVE_STATE = 0x05, /* Save state for S4/S5 */
3893 };
3894
3895 #define TPACPI_RFK_BLUETOOTH_SW_NAME "tpacpi_bluetooth_sw"
3896
3897 static int bluetooth_get_status(void)
3898 {
3899 int status;
3900
3901 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3902 if (dbg_bluetoothemul)
3903 return (tpacpi_bluetooth_emulstate) ?
3904 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
3905 #endif
3906
3907 if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
3908 return -EIO;
3909
3910 return ((status & TP_ACPI_BLUETOOTH_RADIOSSW) != 0) ?
3911 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
3912 }
3913
3914 static int bluetooth_set_status(enum tpacpi_rfkill_state state)
3915 {
3916 int status;
3917
3918 vdbg_printk(TPACPI_DBG_RFKILL,
3919 "will attempt to %s bluetooth\n",
3920 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable");
3921
3922 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3923 if (dbg_bluetoothemul) {
3924 tpacpi_bluetooth_emulstate = (state == TPACPI_RFK_RADIO_ON);
3925 return 0;
3926 }
3927 #endif
3928
3929 if (state == TPACPI_RFK_RADIO_ON)
3930 status = TP_ACPI_BLUETOOTH_RADIOSSW
3931 | TP_ACPI_BLUETOOTH_RESUMECTRL;
3932 else
3933 status = 0;
3934
3935 if (!acpi_evalf(hkey_handle, NULL, "SBDC", "vd", status))
3936 return -EIO;
3937
3938 return 0;
3939 }
3940
3941 /* sysfs bluetooth enable ---------------------------------------------- */
3942 static ssize_t bluetooth_enable_show(struct device *dev,
3943 struct device_attribute *attr,
3944 char *buf)
3945 {
3946 return tpacpi_rfk_sysfs_enable_show(TPACPI_RFK_BLUETOOTH_SW_ID,
3947 attr, buf);
3948 }
3949
3950 static ssize_t bluetooth_enable_store(struct device *dev,
3951 struct device_attribute *attr,
3952 const char *buf, size_t count)
3953 {
3954 return tpacpi_rfk_sysfs_enable_store(TPACPI_RFK_BLUETOOTH_SW_ID,
3955 attr, buf, count);
3956 }
3957
3958 static struct device_attribute dev_attr_bluetooth_enable =
3959 __ATTR(bluetooth_enable, S_IWUSR | S_IRUGO,
3960 bluetooth_enable_show, bluetooth_enable_store);
3961
3962 /* --------------------------------------------------------------------- */
3963
3964 static struct attribute *bluetooth_attributes[] = {
3965 &dev_attr_bluetooth_enable.attr,
3966 NULL
3967 };
3968
3969 static const struct attribute_group bluetooth_attr_group = {
3970 .attrs = bluetooth_attributes,
3971 };
3972
3973 static const struct tpacpi_rfk_ops bluetooth_tprfk_ops = {
3974 .get_status = bluetooth_get_status,
3975 .set_status = bluetooth_set_status,
3976 };
3977
3978 static void bluetooth_shutdown(void)
3979 {
3980 /* Order firmware to save current state to NVRAM */
3981 if (!acpi_evalf(NULL, NULL, "\\BLTH", "vd",
3982 TP_ACPI_BLTH_SAVE_STATE))
3983 printk(TPACPI_NOTICE
3984 "failed to save bluetooth state to NVRAM\n");
3985 else
3986 vdbg_printk(TPACPI_DBG_RFKILL,
3987 "bluestooth state saved to NVRAM\n");
3988 }
3989
3990 static void bluetooth_exit(void)
3991 {
3992 sysfs_remove_group(&tpacpi_pdev->dev.kobj,
3993 &bluetooth_attr_group);
3994
3995 tpacpi_destroy_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID);
3996
3997 bluetooth_shutdown();
3998 }
3999
4000 static int __init bluetooth_init(struct ibm_init_struct *iibm)
4001 {
4002 int res;
4003 int status = 0;
4004
4005 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4006 "initializing bluetooth subdriver\n");
4007
4008 TPACPI_ACPIHANDLE_INIT(hkey);
4009
4010 /* bluetooth not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
4011 G4x, R30, R31, R40e, R50e, T20-22, X20-21 */
4012 tp_features.bluetooth = hkey_handle &&
4013 acpi_evalf(hkey_handle, &status, "GBDC", "qd");
4014
4015 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4016 "bluetooth is %s, status 0x%02x\n",
4017 str_supported(tp_features.bluetooth),
4018 status);
4019
4020 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4021 if (dbg_bluetoothemul) {
4022 tp_features.bluetooth = 1;
4023 printk(TPACPI_INFO
4024 "bluetooth switch emulation enabled\n");
4025 } else
4026 #endif
4027 if (tp_features.bluetooth &&
4028 !(status & TP_ACPI_BLUETOOTH_HWPRESENT)) {
4029 /* no bluetooth hardware present in system */
4030 tp_features.bluetooth = 0;
4031 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4032 "bluetooth hardware not installed\n");
4033 }
4034
4035 if (!tp_features.bluetooth)
4036 return 1;
4037
4038 res = tpacpi_new_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID,
4039 &bluetooth_tprfk_ops,
4040 RFKILL_TYPE_BLUETOOTH,
4041 TPACPI_RFK_BLUETOOTH_SW_NAME,
4042 true);
4043 if (res)
4044 return res;
4045
4046 res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
4047 &bluetooth_attr_group);
4048 if (res) {
4049 tpacpi_destroy_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID);
4050 return res;
4051 }
4052
4053 return 0;
4054 }
4055
4056 /* procfs -------------------------------------------------------------- */
4057 static int bluetooth_read(struct seq_file *m)
4058 {
4059 return tpacpi_rfk_procfs_read(TPACPI_RFK_BLUETOOTH_SW_ID, m);
4060 }
4061
4062 static int bluetooth_write(char *buf)
4063 {
4064 return tpacpi_rfk_procfs_write(TPACPI_RFK_BLUETOOTH_SW_ID, buf);
4065 }
4066
4067 static struct ibm_struct bluetooth_driver_data = {
4068 .name = "bluetooth",
4069 .read = bluetooth_read,
4070 .write = bluetooth_write,
4071 .exit = bluetooth_exit,
4072 .shutdown = bluetooth_shutdown,
4073 };
4074
4075 /*************************************************************************
4076 * Wan subdriver
4077 */
4078
4079 enum {
4080 /* ACPI GWAN/SWAN bits */
4081 TP_ACPI_WANCARD_HWPRESENT = 0x01, /* Wan hw available */
4082 TP_ACPI_WANCARD_RADIOSSW = 0x02, /* Wan radio enabled */
4083 TP_ACPI_WANCARD_RESUMECTRL = 0x04, /* Wan state at resume:
4084 0 = disable, 1 = enable */
4085 };
4086
4087 #define TPACPI_RFK_WWAN_SW_NAME "tpacpi_wwan_sw"
4088
4089 static int wan_get_status(void)
4090 {
4091 int status;
4092
4093 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4094 if (dbg_wwanemul)
4095 return (tpacpi_wwan_emulstate) ?
4096 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4097 #endif
4098
4099 if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
4100 return -EIO;
4101
4102 return ((status & TP_ACPI_WANCARD_RADIOSSW) != 0) ?
4103 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4104 }
4105
4106 static int wan_set_status(enum tpacpi_rfkill_state state)
4107 {
4108 int status;
4109
4110 vdbg_printk(TPACPI_DBG_RFKILL,
4111 "will attempt to %s wwan\n",
4112 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable");
4113
4114 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4115 if (dbg_wwanemul) {
4116 tpacpi_wwan_emulstate = (state == TPACPI_RFK_RADIO_ON);
4117 return 0;
4118 }
4119 #endif
4120
4121 if (state == TPACPI_RFK_RADIO_ON)
4122 status = TP_ACPI_WANCARD_RADIOSSW
4123 | TP_ACPI_WANCARD_RESUMECTRL;
4124 else
4125 status = 0;
4126
4127 if (!acpi_evalf(hkey_handle, NULL, "SWAN", "vd", status))
4128 return -EIO;
4129
4130 return 0;
4131 }
4132
4133 /* sysfs wan enable ---------------------------------------------------- */
4134 static ssize_t wan_enable_show(struct device *dev,
4135 struct device_attribute *attr,
4136 char *buf)
4137 {
4138 return tpacpi_rfk_sysfs_enable_show(TPACPI_RFK_WWAN_SW_ID,
4139 attr, buf);
4140 }
4141
4142 static ssize_t wan_enable_store(struct device *dev,
4143 struct device_attribute *attr,
4144 const char *buf, size_t count)
4145 {
4146 return tpacpi_rfk_sysfs_enable_store(TPACPI_RFK_WWAN_SW_ID,
4147 attr, buf, count);
4148 }
4149
4150 static struct device_attribute dev_attr_wan_enable =
4151 __ATTR(wwan_enable, S_IWUSR | S_IRUGO,
4152 wan_enable_show, wan_enable_store);
4153
4154 /* --------------------------------------------------------------------- */
4155
4156 static struct attribute *wan_attributes[] = {
4157 &dev_attr_wan_enable.attr,
4158 NULL
4159 };
4160
4161 static const struct attribute_group wan_attr_group = {
4162 .attrs = wan_attributes,
4163 };
4164
4165 static const struct tpacpi_rfk_ops wan_tprfk_ops = {
4166 .get_status = wan_get_status,
4167 .set_status = wan_set_status,
4168 };
4169
4170 static void wan_shutdown(void)
4171 {
4172 /* Order firmware to save current state to NVRAM */
4173 if (!acpi_evalf(NULL, NULL, "\\WGSV", "vd",
4174 TP_ACPI_WGSV_SAVE_STATE))
4175 printk(TPACPI_NOTICE
4176 "failed to save WWAN state to NVRAM\n");
4177 else
4178 vdbg_printk(TPACPI_DBG_RFKILL,
4179 "WWAN state saved to NVRAM\n");
4180 }
4181
4182 static void wan_exit(void)
4183 {
4184 sysfs_remove_group(&tpacpi_pdev->dev.kobj,
4185 &wan_attr_group);
4186
4187 tpacpi_destroy_rfkill(TPACPI_RFK_WWAN_SW_ID);
4188
4189 wan_shutdown();
4190 }
4191
4192 static int __init wan_init(struct ibm_init_struct *iibm)
4193 {
4194 int res;
4195 int status = 0;
4196
4197 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4198 "initializing wan subdriver\n");
4199
4200 TPACPI_ACPIHANDLE_INIT(hkey);
4201
4202 tp_features.wan = hkey_handle &&
4203 acpi_evalf(hkey_handle, &status, "GWAN", "qd");
4204
4205 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4206 "wan is %s, status 0x%02x\n",
4207 str_supported(tp_features.wan),
4208 status);
4209
4210 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4211 if (dbg_wwanemul) {
4212 tp_features.wan = 1;
4213 printk(TPACPI_INFO
4214 "wwan switch emulation enabled\n");
4215 } else
4216 #endif
4217 if (tp_features.wan &&
4218 !(status & TP_ACPI_WANCARD_HWPRESENT)) {
4219 /* no wan hardware present in system */
4220 tp_features.wan = 0;
4221 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4222 "wan hardware not installed\n");
4223 }
4224
4225 if (!tp_features.wan)
4226 return 1;
4227
4228 res = tpacpi_new_rfkill(TPACPI_RFK_WWAN_SW_ID,
4229 &wan_tprfk_ops,
4230 RFKILL_TYPE_WWAN,
4231 TPACPI_RFK_WWAN_SW_NAME,
4232 true);
4233 if (res)
4234 return res;
4235
4236 res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
4237 &wan_attr_group);
4238
4239 if (res) {
4240 tpacpi_destroy_rfkill(TPACPI_RFK_WWAN_SW_ID);
4241 return res;
4242 }
4243
4244 return 0;
4245 }
4246
4247 /* procfs -------------------------------------------------------------- */
4248 static int wan_read(struct seq_file *m)
4249 {
4250 return tpacpi_rfk_procfs_read(TPACPI_RFK_WWAN_SW_ID, m);
4251 }
4252
4253 static int wan_write(char *buf)
4254 {
4255 return tpacpi_rfk_procfs_write(TPACPI_RFK_WWAN_SW_ID, buf);
4256 }
4257
4258 static struct ibm_struct wan_driver_data = {
4259 .name = "wan",
4260 .read = wan_read,
4261 .write = wan_write,
4262 .exit = wan_exit,
4263 .shutdown = wan_shutdown,
4264 };
4265
4266 /*************************************************************************
4267 * UWB subdriver
4268 */
4269
4270 enum {
4271 /* ACPI GUWB/SUWB bits */
4272 TP_ACPI_UWB_HWPRESENT = 0x01, /* UWB hw available */
4273 TP_ACPI_UWB_RADIOSSW = 0x02, /* UWB radio enabled */
4274 };
4275
4276 #define TPACPI_RFK_UWB_SW_NAME "tpacpi_uwb_sw"
4277
4278 static int uwb_get_status(void)
4279 {
4280 int status;
4281
4282 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4283 if (dbg_uwbemul)
4284 return (tpacpi_uwb_emulstate) ?
4285 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4286 #endif
4287
4288 if (!acpi_evalf(hkey_handle, &status, "GUWB", "d"))
4289 return -EIO;
4290
4291 return ((status & TP_ACPI_UWB_RADIOSSW) != 0) ?
4292 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4293 }
4294
4295 static int uwb_set_status(enum tpacpi_rfkill_state state)
4296 {
4297 int status;
4298
4299 vdbg_printk(TPACPI_DBG_RFKILL,
4300 "will attempt to %s UWB\n",
4301 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable");
4302
4303 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4304 if (dbg_uwbemul) {
4305 tpacpi_uwb_emulstate = (state == TPACPI_RFK_RADIO_ON);
4306 return 0;
4307 }
4308 #endif
4309
4310 if (state == TPACPI_RFK_RADIO_ON)
4311 status = TP_ACPI_UWB_RADIOSSW;
4312 else
4313 status = 0;
4314
4315 if (!acpi_evalf(hkey_handle, NULL, "SUWB", "vd", status))
4316 return -EIO;
4317
4318 return 0;
4319 }
4320
4321 /* --------------------------------------------------------------------- */
4322
4323 static const struct tpacpi_rfk_ops uwb_tprfk_ops = {
4324 .get_status = uwb_get_status,
4325 .set_status = uwb_set_status,
4326 };
4327
4328 static void uwb_exit(void)
4329 {
4330 tpacpi_destroy_rfkill(TPACPI_RFK_UWB_SW_ID);
4331 }
4332
4333 static int __init uwb_init(struct ibm_init_struct *iibm)
4334 {
4335 int res;
4336 int status = 0;
4337
4338 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4339 "initializing uwb subdriver\n");
4340
4341 TPACPI_ACPIHANDLE_INIT(hkey);
4342
4343 tp_features.uwb = hkey_handle &&
4344 acpi_evalf(hkey_handle, &status, "GUWB", "qd");
4345
4346 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4347 "uwb is %s, status 0x%02x\n",
4348 str_supported(tp_features.uwb),
4349 status);
4350
4351 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4352 if (dbg_uwbemul) {
4353 tp_features.uwb = 1;
4354 printk(TPACPI_INFO
4355 "uwb switch emulation enabled\n");
4356 } else
4357 #endif
4358 if (tp_features.uwb &&
4359 !(status & TP_ACPI_UWB_HWPRESENT)) {
4360 /* no uwb hardware present in system */
4361 tp_features.uwb = 0;
4362 dbg_printk(TPACPI_DBG_INIT,
4363 "uwb hardware not installed\n");
4364 }
4365
4366 if (!tp_features.uwb)
4367 return 1;
4368
4369 res = tpacpi_new_rfkill(TPACPI_RFK_UWB_SW_ID,
4370 &uwb_tprfk_ops,
4371 RFKILL_TYPE_UWB,
4372 TPACPI_RFK_UWB_SW_NAME,
4373 false);
4374 return res;
4375 }
4376
4377 static struct ibm_struct uwb_driver_data = {
4378 .name = "uwb",
4379 .exit = uwb_exit,
4380 .flags.experimental = 1,
4381 };
4382
4383 /*************************************************************************
4384 * Video subdriver
4385 */
4386
4387 #ifdef CONFIG_THINKPAD_ACPI_VIDEO
4388
4389 enum video_access_mode {
4390 TPACPI_VIDEO_NONE = 0,
4391 TPACPI_VIDEO_570, /* 570 */
4392 TPACPI_VIDEO_770, /* 600e/x, 770e, 770x */
4393 TPACPI_VIDEO_NEW, /* all others */
4394 };
4395
4396 enum { /* video status flags, based on VIDEO_570 */
4397 TP_ACPI_VIDEO_S_LCD = 0x01, /* LCD output enabled */
4398 TP_ACPI_VIDEO_S_CRT = 0x02, /* CRT output enabled */
4399 TP_ACPI_VIDEO_S_DVI = 0x08, /* DVI output enabled */
4400 };
4401
4402 enum { /* TPACPI_VIDEO_570 constants */
4403 TP_ACPI_VIDEO_570_PHSCMD = 0x87, /* unknown magic constant :( */
4404 TP_ACPI_VIDEO_570_PHSMASK = 0x03, /* PHS bits that map to
4405 * video_status_flags */
4406 TP_ACPI_VIDEO_570_PHS2CMD = 0x8b, /* unknown magic constant :( */
4407 TP_ACPI_VIDEO_570_PHS2SET = 0x80, /* unknown magic constant :( */
4408 };
4409
4410 static enum video_access_mode video_supported;
4411 static int video_orig_autosw;
4412
4413 static int video_autosw_get(void);
4414 static int video_autosw_set(int enable);
4415
4416 TPACPI_HANDLE(vid2, root, "\\_SB.PCI0.AGPB.VID"); /* G41 */
4417
4418 static int __init video_init(struct ibm_init_struct *iibm)
4419 {
4420 int ivga;
4421
4422 vdbg_printk(TPACPI_DBG_INIT, "initializing video subdriver\n");
4423
4424 TPACPI_ACPIHANDLE_INIT(vid);
4425 TPACPI_ACPIHANDLE_INIT(vid2);
4426
4427 if (vid2_handle && acpi_evalf(NULL, &ivga, "\\IVGA", "d") && ivga)
4428 /* G41, assume IVGA doesn't change */
4429 vid_handle = vid2_handle;
4430
4431 if (!vid_handle)
4432 /* video switching not supported on R30, R31 */
4433 video_supported = TPACPI_VIDEO_NONE;
4434 else if (acpi_evalf(vid_handle, &video_orig_autosw, "SWIT", "qd"))
4435 /* 570 */
4436 video_supported = TPACPI_VIDEO_570;
4437 else if (acpi_evalf(vid_handle, &video_orig_autosw, "^VADL", "qd"))
4438 /* 600e/x, 770e, 770x */
4439 video_supported = TPACPI_VIDEO_770;
4440 else
4441 /* all others */
4442 video_supported = TPACPI_VIDEO_NEW;
4443
4444 vdbg_printk(TPACPI_DBG_INIT, "video is %s, mode %d\n",
4445 str_supported(video_supported != TPACPI_VIDEO_NONE),
4446 video_supported);
4447
4448 return (video_supported != TPACPI_VIDEO_NONE)? 0 : 1;
4449 }
4450
4451 static void video_exit(void)
4452 {
4453 dbg_printk(TPACPI_DBG_EXIT,
4454 "restoring original video autoswitch mode\n");
4455 if (video_autosw_set(video_orig_autosw))
4456 printk(TPACPI_ERR "error while trying to restore original "
4457 "video autoswitch mode\n");
4458 }
4459
4460 static int video_outputsw_get(void)
4461 {
4462 int status = 0;
4463 int i;
4464
4465 switch (video_supported) {
4466 case TPACPI_VIDEO_570:
4467 if (!acpi_evalf(NULL, &i, "\\_SB.PHS", "dd",
4468 TP_ACPI_VIDEO_570_PHSCMD))
4469 return -EIO;
4470 status = i & TP_ACPI_VIDEO_570_PHSMASK;
4471 break;
4472 case TPACPI_VIDEO_770:
4473 if (!acpi_evalf(NULL, &i, "\\VCDL", "d"))
4474 return -EIO;
4475 if (i)
4476 status |= TP_ACPI_VIDEO_S_LCD;
4477 if (!acpi_evalf(NULL, &i, "\\VCDC", "d"))
4478 return -EIO;
4479 if (i)
4480 status |= TP_ACPI_VIDEO_S_CRT;
4481 break;
4482 case TPACPI_VIDEO_NEW:
4483 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 1) ||
4484 !acpi_evalf(NULL, &i, "\\VCDC", "d"))
4485 return -EIO;
4486 if (i)
4487 status |= TP_ACPI_VIDEO_S_CRT;
4488
4489 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0) ||
4490 !acpi_evalf(NULL, &i, "\\VCDL", "d"))
4491 return -EIO;
4492 if (i)
4493 status |= TP_ACPI_VIDEO_S_LCD;
4494 if (!acpi_evalf(NULL, &i, "\\VCDD", "d"))
4495 return -EIO;
4496 if (i)
4497 status |= TP_ACPI_VIDEO_S_DVI;
4498 break;
4499 default:
4500 return -ENOSYS;
4501 }
4502
4503 return status;
4504 }
4505
4506 static int video_outputsw_set(int status)
4507 {
4508 int autosw;
4509 int res = 0;
4510
4511 switch (video_supported) {
4512 case TPACPI_VIDEO_570:
4513 res = acpi_evalf(NULL, NULL,
4514 "\\_SB.PHS2", "vdd",
4515 TP_ACPI_VIDEO_570_PHS2CMD,
4516 status | TP_ACPI_VIDEO_570_PHS2SET);
4517 break;
4518 case TPACPI_VIDEO_770:
4519 autosw = video_autosw_get();
4520 if (autosw < 0)
4521 return autosw;
4522
4523 res = video_autosw_set(1);
4524 if (res)
4525 return res;
4526 res = acpi_evalf(vid_handle, NULL,
4527 "ASWT", "vdd", status * 0x100, 0);
4528 if (!autosw && video_autosw_set(autosw)) {
4529 printk(TPACPI_ERR
4530 "video auto-switch left enabled due to error\n");
4531 return -EIO;
4532 }
4533 break;
4534 case TPACPI_VIDEO_NEW:
4535 res = acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0x80) &&
4536 acpi_evalf(NULL, NULL, "\\VSDS", "vdd", status, 1);
4537 break;
4538 default:
4539 return -ENOSYS;
4540 }
4541
4542 return (res)? 0 : -EIO;
4543 }
4544
4545 static int video_autosw_get(void)
4546 {
4547 int autosw = 0;
4548
4549 switch (video_supported) {
4550 case TPACPI_VIDEO_570:
4551 if (!acpi_evalf(vid_handle, &autosw, "SWIT", "d"))
4552 return -EIO;
4553 break;
4554 case TPACPI_VIDEO_770:
4555 case TPACPI_VIDEO_NEW:
4556 if (!acpi_evalf(vid_handle, &autosw, "^VDEE", "d"))
4557 return -EIO;
4558 break;
4559 default:
4560 return -ENOSYS;
4561 }
4562
4563 return autosw & 1;
4564 }
4565
4566 static int video_autosw_set(int enable)
4567 {
4568 if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", (enable)? 1 : 0))
4569 return -EIO;
4570 return 0;
4571 }
4572
4573 static int video_outputsw_cycle(void)
4574 {
4575 int autosw = video_autosw_get();
4576 int res;
4577
4578 if (autosw < 0)
4579 return autosw;
4580
4581 switch (video_supported) {
4582 case TPACPI_VIDEO_570:
4583 res = video_autosw_set(1);
4584 if (res)
4585 return res;
4586 res = acpi_evalf(ec_handle, NULL, "_Q16", "v");
4587 break;
4588 case TPACPI_VIDEO_770:
4589 case TPACPI_VIDEO_NEW:
4590 res = video_autosw_set(1);
4591 if (res)
4592 return res;
4593 res = acpi_evalf(vid_handle, NULL, "VSWT", "v");
4594 break;
4595 default:
4596 return -ENOSYS;
4597 }
4598 if (!autosw && video_autosw_set(autosw)) {
4599 printk(TPACPI_ERR
4600 "video auto-switch left enabled due to error\n");
4601 return -EIO;
4602 }
4603
4604 return (res)? 0 : -EIO;
4605 }
4606
4607 static int video_expand_toggle(void)
4608 {
4609 switch (video_supported) {
4610 case TPACPI_VIDEO_570:
4611 return acpi_evalf(ec_handle, NULL, "_Q17", "v")?
4612 0 : -EIO;
4613 case TPACPI_VIDEO_770:
4614 return acpi_evalf(vid_handle, NULL, "VEXP", "v")?
4615 0 : -EIO;
4616 case TPACPI_VIDEO_NEW:
4617 return acpi_evalf(NULL, NULL, "\\VEXP", "v")?
4618 0 : -EIO;
4619 default:
4620 return -ENOSYS;
4621 }
4622 /* not reached */
4623 }
4624
4625 static int video_read(struct seq_file *m)
4626 {
4627 int status, autosw;
4628
4629 if (video_supported == TPACPI_VIDEO_NONE) {
4630 seq_printf(m, "status:\t\tnot supported\n");
4631 return 0;
4632 }
4633
4634 /* Even reads can crash X.org, so... */
4635 if (!capable(CAP_SYS_ADMIN))
4636 return -EPERM;
4637
4638 status = video_outputsw_get();
4639 if (status < 0)
4640 return status;
4641
4642 autosw = video_autosw_get();
4643 if (autosw < 0)
4644 return autosw;
4645
4646 seq_printf(m, "status:\t\tsupported\n");
4647 seq_printf(m, "lcd:\t\t%s\n", enabled(status, 0));
4648 seq_printf(m, "crt:\t\t%s\n", enabled(status, 1));
4649 if (video_supported == TPACPI_VIDEO_NEW)
4650 seq_printf(m, "dvi:\t\t%s\n", enabled(status, 3));
4651 seq_printf(m, "auto:\t\t%s\n", enabled(autosw, 0));
4652 seq_printf(m, "commands:\tlcd_enable, lcd_disable\n");
4653 seq_printf(m, "commands:\tcrt_enable, crt_disable\n");
4654 if (video_supported == TPACPI_VIDEO_NEW)
4655 seq_printf(m, "commands:\tdvi_enable, dvi_disable\n");
4656 seq_printf(m, "commands:\tauto_enable, auto_disable\n");
4657 seq_printf(m, "commands:\tvideo_switch, expand_toggle\n");
4658
4659 return 0;
4660 }
4661
4662 static int video_write(char *buf)
4663 {
4664 char *cmd;
4665 int enable, disable, status;
4666 int res;
4667
4668 if (video_supported == TPACPI_VIDEO_NONE)
4669 return -ENODEV;
4670
4671 /* Even reads can crash X.org, let alone writes... */
4672 if (!capable(CAP_SYS_ADMIN))
4673 return -EPERM;
4674
4675 enable = 0;
4676 disable = 0;
4677
4678 while ((cmd = next_cmd(&buf))) {
4679 if (strlencmp(cmd, "lcd_enable") == 0) {
4680 enable |= TP_ACPI_VIDEO_S_LCD;
4681 } else if (strlencmp(cmd, "lcd_disable") == 0) {
4682 disable |= TP_ACPI_VIDEO_S_LCD;
4683 } else if (strlencmp(cmd, "crt_enable") == 0) {
4684 enable |= TP_ACPI_VIDEO_S_CRT;
4685 } else if (strlencmp(cmd, "crt_disable") == 0) {
4686 disable |= TP_ACPI_VIDEO_S_CRT;
4687 } else if (video_supported == TPACPI_VIDEO_NEW &&
4688 strlencmp(cmd, "dvi_enable") == 0) {
4689 enable |= TP_ACPI_VIDEO_S_DVI;
4690 } else if (video_supported == TPACPI_VIDEO_NEW &&
4691 strlencmp(cmd, "dvi_disable") == 0) {
4692 disable |= TP_ACPI_VIDEO_S_DVI;
4693 } else if (strlencmp(cmd, "auto_enable") == 0) {
4694 res = video_autosw_set(1);
4695 if (res)
4696 return res;
4697 } else if (strlencmp(cmd, "auto_disable") == 0) {
4698 res = video_autosw_set(0);
4699 if (res)
4700 return res;
4701 } else if (strlencmp(cmd, "video_switch") == 0) {
4702 res = video_outputsw_cycle();
4703 if (res)
4704 return res;
4705 } else if (strlencmp(cmd, "expand_toggle") == 0) {
4706 res = video_expand_toggle();
4707 if (res)
4708 return res;
4709 } else
4710 return -EINVAL;
4711 }
4712
4713 if (enable || disable) {
4714 status = video_outputsw_get();
4715 if (status < 0)
4716 return status;
4717 res = video_outputsw_set((status & ~disable) | enable);
4718 if (res)
4719 return res;
4720 }
4721
4722 return 0;
4723 }
4724
4725 static struct ibm_struct video_driver_data = {
4726 .name = "video",
4727 .read = video_read,
4728 .write = video_write,
4729 .exit = video_exit,
4730 };
4731
4732 #endif /* CONFIG_THINKPAD_ACPI_VIDEO */
4733
4734 /*************************************************************************
4735 * Light (thinklight) subdriver
4736 */
4737
4738 TPACPI_HANDLE(lght, root, "\\LGHT"); /* A21e, A2xm/p, T20-22, X20-21 */
4739 TPACPI_HANDLE(ledb, ec, "LEDB"); /* G4x */
4740
4741 static int light_get_status(void)
4742 {
4743 int status = 0;
4744
4745 if (tp_features.light_status) {
4746 if (!acpi_evalf(ec_handle, &status, "KBLT", "d"))
4747 return -EIO;
4748 return (!!status);
4749 }
4750
4751 return -ENXIO;
4752 }
4753
4754 static int light_set_status(int status)
4755 {
4756 int rc;
4757
4758 if (tp_features.light) {
4759 if (cmos_handle) {
4760 rc = acpi_evalf(cmos_handle, NULL, NULL, "vd",
4761 (status)?
4762 TP_CMOS_THINKLIGHT_ON :
4763 TP_CMOS_THINKLIGHT_OFF);
4764 } else {
4765 rc = acpi_evalf(lght_handle, NULL, NULL, "vd",
4766 (status)? 1 : 0);
4767 }
4768 return (rc)? 0 : -EIO;
4769 }
4770
4771 return -ENXIO;
4772 }
4773
4774 static void light_set_status_worker(struct work_struct *work)
4775 {
4776 struct tpacpi_led_classdev *data =
4777 container_of(work, struct tpacpi_led_classdev, work);
4778
4779 if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING))
4780 light_set_status((data->new_state != TPACPI_LED_OFF));
4781 }
4782
4783 static void light_sysfs_set(struct led_classdev *led_cdev,
4784 enum led_brightness brightness)
4785 {
4786 struct tpacpi_led_classdev *data =
4787 container_of(led_cdev,
4788 struct tpacpi_led_classdev,
4789 led_classdev);
4790 data->new_state = (brightness != LED_OFF) ?
4791 TPACPI_LED_ON : TPACPI_LED_OFF;
4792 queue_work(tpacpi_wq, &data->work);
4793 }
4794
4795 static enum led_brightness light_sysfs_get(struct led_classdev *led_cdev)
4796 {
4797 return (light_get_status() == 1)? LED_FULL : LED_OFF;
4798 }
4799
4800 static struct tpacpi_led_classdev tpacpi_led_thinklight = {
4801 .led_classdev = {
4802 .name = "tpacpi::thinklight",
4803 .brightness_set = &light_sysfs_set,
4804 .brightness_get = &light_sysfs_get,
4805 }
4806 };
4807
4808 static int __init light_init(struct ibm_init_struct *iibm)
4809 {
4810 int rc;
4811
4812 vdbg_printk(TPACPI_DBG_INIT, "initializing light subdriver\n");
4813
4814 TPACPI_ACPIHANDLE_INIT(ledb);
4815 TPACPI_ACPIHANDLE_INIT(lght);
4816 TPACPI_ACPIHANDLE_INIT(cmos);
4817 INIT_WORK(&tpacpi_led_thinklight.work, light_set_status_worker);
4818
4819 /* light not supported on 570, 600e/x, 770e, 770x, G4x, R30, R31 */
4820 tp_features.light = (cmos_handle || lght_handle) && !ledb_handle;
4821
4822 if (tp_features.light)
4823 /* light status not supported on
4824 570, 600e/x, 770e, 770x, G4x, R30, R31, R32, X20 */
4825 tp_features.light_status =
4826 acpi_evalf(ec_handle, NULL, "KBLT", "qv");
4827
4828 vdbg_printk(TPACPI_DBG_INIT, "light is %s, light status is %s\n",
4829 str_supported(tp_features.light),
4830 str_supported(tp_features.light_status));
4831
4832 if (!tp_features.light)
4833 return 1;
4834
4835 rc = led_classdev_register(&tpacpi_pdev->dev,
4836 &tpacpi_led_thinklight.led_classdev);
4837
4838 if (rc < 0) {
4839 tp_features.light = 0;
4840 tp_features.light_status = 0;
4841 } else {
4842 rc = 0;
4843 }
4844
4845 return rc;
4846 }
4847
4848 static void light_exit(void)
4849 {
4850 led_classdev_unregister(&tpacpi_led_thinklight.led_classdev);
4851 if (work_pending(&tpacpi_led_thinklight.work))
4852 flush_workqueue(tpacpi_wq);
4853 }
4854
4855 static int light_read(struct seq_file *m)
4856 {
4857 int status;
4858
4859 if (!tp_features.light) {
4860 seq_printf(m, "status:\t\tnot supported\n");
4861 } else if (!tp_features.light_status) {
4862 seq_printf(m, "status:\t\tunknown\n");
4863 seq_printf(m, "commands:\ton, off\n");
4864 } else {
4865 status = light_get_status();
4866 if (status < 0)
4867 return status;
4868 seq_printf(m, "status:\t\t%s\n", onoff(status, 0));
4869 seq_printf(m, "commands:\ton, off\n");
4870 }
4871
4872 return 0;
4873 }
4874
4875 static int light_write(char *buf)
4876 {
4877 char *cmd;
4878 int newstatus = 0;
4879
4880 if (!tp_features.light)
4881 return -ENODEV;
4882
4883 while ((cmd = next_cmd(&buf))) {
4884 if (strlencmp(cmd, "on") == 0) {
4885 newstatus = 1;
4886 } else if (strlencmp(cmd, "off") == 0) {
4887 newstatus = 0;
4888 } else
4889 return -EINVAL;
4890 }
4891
4892 return light_set_status(newstatus);
4893 }
4894
4895 static struct ibm_struct light_driver_data = {
4896 .name = "light",
4897 .read = light_read,
4898 .write = light_write,
4899 .exit = light_exit,
4900 };
4901
4902 /*************************************************************************
4903 * CMOS subdriver
4904 */
4905
4906 /* sysfs cmos_command -------------------------------------------------- */
4907 static ssize_t cmos_command_store(struct device *dev,
4908 struct device_attribute *attr,
4909 const char *buf, size_t count)
4910 {
4911 unsigned long cmos_cmd;
4912 int res;
4913
4914 if (parse_strtoul(buf, 21, &cmos_cmd))
4915 return -EINVAL;
4916
4917 res = issue_thinkpad_cmos_command(cmos_cmd);
4918 return (res)? res : count;
4919 }
4920
4921 static struct device_attribute dev_attr_cmos_command =
4922 __ATTR(cmos_command, S_IWUSR, NULL, cmos_command_store);
4923
4924 /* --------------------------------------------------------------------- */
4925
4926 static int __init cmos_init(struct ibm_init_struct *iibm)
4927 {
4928 int res;
4929
4930 vdbg_printk(TPACPI_DBG_INIT,
4931 "initializing cmos commands subdriver\n");
4932
4933 TPACPI_ACPIHANDLE_INIT(cmos);
4934
4935 vdbg_printk(TPACPI_DBG_INIT, "cmos commands are %s\n",
4936 str_supported(cmos_handle != NULL));
4937
4938 res = device_create_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
4939 if (res)
4940 return res;
4941
4942 return (cmos_handle)? 0 : 1;
4943 }
4944
4945 static void cmos_exit(void)
4946 {
4947 device_remove_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
4948 }
4949
4950 static int cmos_read(struct seq_file *m)
4951 {
4952 /* cmos not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
4953 R30, R31, T20-22, X20-21 */
4954 if (!cmos_handle)
4955 seq_printf(m, "status:\t\tnot supported\n");
4956 else {
4957 seq_printf(m, "status:\t\tsupported\n");
4958 seq_printf(m, "commands:\t<cmd> (<cmd> is 0-21)\n");
4959 }
4960
4961 return 0;
4962 }
4963
4964 static int cmos_write(char *buf)
4965 {
4966 char *cmd;
4967 int cmos_cmd, res;
4968
4969 while ((cmd = next_cmd(&buf))) {
4970 if (sscanf(cmd, "%u", &cmos_cmd) == 1 &&
4971 cmos_cmd >= 0 && cmos_cmd <= 21) {
4972 /* cmos_cmd set */
4973 } else
4974 return -EINVAL;
4975
4976 res = issue_thinkpad_cmos_command(cmos_cmd);
4977 if (res)
4978 return res;
4979 }
4980
4981 return 0;
4982 }
4983
4984 static struct ibm_struct cmos_driver_data = {
4985 .name = "cmos",
4986 .read = cmos_read,
4987 .write = cmos_write,
4988 .exit = cmos_exit,
4989 };
4990
4991 /*************************************************************************
4992 * LED subdriver
4993 */
4994
4995 enum led_access_mode {
4996 TPACPI_LED_NONE = 0,
4997 TPACPI_LED_570, /* 570 */
4998 TPACPI_LED_OLD, /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
4999 TPACPI_LED_NEW, /* all others */
5000 };
5001
5002 enum { /* For TPACPI_LED_OLD */
5003 TPACPI_LED_EC_HLCL = 0x0c, /* EC reg to get led to power on */
5004 TPACPI_LED_EC_HLBL = 0x0d, /* EC reg to blink a lit led */
5005 TPACPI_LED_EC_HLMS = 0x0e, /* EC reg to select led to command */
5006 };
5007
5008 static enum led_access_mode led_supported;
5009
5010 TPACPI_HANDLE(led, ec, "SLED", /* 570 */
5011 "SYSL", /* 600e/x, 770e, 770x, A21e, A2xm/p, */
5012 /* T20-22, X20-21 */
5013 "LED", /* all others */
5014 ); /* R30, R31 */
5015
5016 #define TPACPI_LED_NUMLEDS 16
5017 static struct tpacpi_led_classdev *tpacpi_leds;
5018 static enum led_status_t tpacpi_led_state_cache[TPACPI_LED_NUMLEDS];
5019 static const char * const tpacpi_led_names[TPACPI_LED_NUMLEDS] = {
5020 /* there's a limit of 19 chars + NULL before 2.6.26 */
5021 "tpacpi::power",
5022 "tpacpi:orange:batt",
5023 "tpacpi:green:batt",
5024 "tpacpi::dock_active",
5025 "tpacpi::bay_active",
5026 "tpacpi::dock_batt",
5027 "tpacpi::unknown_led",
5028 "tpacpi::standby",
5029 "tpacpi::dock_status1",
5030 "tpacpi::dock_status2",
5031 "tpacpi::unknown_led2",
5032 "tpacpi::unknown_led3",
5033 "tpacpi::thinkvantage",
5034 };
5035 #define TPACPI_SAFE_LEDS 0x1081U
5036
5037 static inline bool tpacpi_is_led_restricted(const unsigned int led)
5038 {
5039 #ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS
5040 return false;
5041 #else
5042 return (1U & (TPACPI_SAFE_LEDS >> led)) == 0;
5043 #endif
5044 }
5045
5046 static int led_get_status(const unsigned int led)
5047 {
5048 int status;
5049 enum led_status_t led_s;
5050
5051 switch (led_supported) {
5052 case TPACPI_LED_570:
5053 if (!acpi_evalf(ec_handle,
5054 &status, "GLED", "dd", 1 << led))
5055 return -EIO;
5056 led_s = (status == 0)?
5057 TPACPI_LED_OFF :
5058 ((status == 1)?
5059 TPACPI_LED_ON :
5060 TPACPI_LED_BLINK);
5061 tpacpi_led_state_cache[led] = led_s;
5062 return led_s;
5063 default:
5064 return -ENXIO;
5065 }
5066
5067 /* not reached */
5068 }
5069
5070 static int led_set_status(const unsigned int led,
5071 const enum led_status_t ledstatus)
5072 {
5073 /* off, on, blink. Index is led_status_t */
5074 static const unsigned int led_sled_arg1[] = { 0, 1, 3 };
5075 static const unsigned int led_led_arg1[] = { 0, 0x80, 0xc0 };
5076
5077 int rc = 0;
5078
5079 switch (led_supported) {
5080 case TPACPI_LED_570:
5081 /* 570 */
5082 if (unlikely(led > 7))
5083 return -EINVAL;
5084 if (unlikely(tpacpi_is_led_restricted(led)))
5085 return -EPERM;
5086 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
5087 (1 << led), led_sled_arg1[ledstatus]))
5088 rc = -EIO;
5089 break;
5090 case TPACPI_LED_OLD:
5091 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */
5092 if (unlikely(led > 7))
5093 return -EINVAL;
5094 if (unlikely(tpacpi_is_led_restricted(led)))
5095 return -EPERM;
5096 rc = ec_write(TPACPI_LED_EC_HLMS, (1 << led));
5097 if (rc >= 0)
5098 rc = ec_write(TPACPI_LED_EC_HLBL,
5099 (ledstatus == TPACPI_LED_BLINK) << led);
5100 if (rc >= 0)
5101 rc = ec_write(TPACPI_LED_EC_HLCL,
5102 (ledstatus != TPACPI_LED_OFF) << led);
5103 break;
5104 case TPACPI_LED_NEW:
5105 /* all others */
5106 if (unlikely(led >= TPACPI_LED_NUMLEDS))
5107 return -EINVAL;
5108 if (unlikely(tpacpi_is_led_restricted(led)))
5109 return -EPERM;
5110 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
5111 led, led_led_arg1[ledstatus]))
5112 rc = -EIO;
5113 break;
5114 default:
5115 rc = -ENXIO;
5116 }
5117
5118 if (!rc)
5119 tpacpi_led_state_cache[led] = ledstatus;
5120
5121 return rc;
5122 }
5123
5124 static void led_set_status_worker(struct work_struct *work)
5125 {
5126 struct tpacpi_led_classdev *data =
5127 container_of(work, struct tpacpi_led_classdev, work);
5128
5129 if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING))
5130 led_set_status(data->led, data->new_state);
5131 }
5132
5133 static void led_sysfs_set(struct led_classdev *led_cdev,
5134 enum led_brightness brightness)
5135 {
5136 struct tpacpi_led_classdev *data = container_of(led_cdev,
5137 struct tpacpi_led_classdev, led_classdev);
5138
5139 if (brightness == LED_OFF)
5140 data->new_state = TPACPI_LED_OFF;
5141 else if (tpacpi_led_state_cache[data->led] != TPACPI_LED_BLINK)
5142 data->new_state = TPACPI_LED_ON;
5143 else
5144 data->new_state = TPACPI_LED_BLINK;
5145
5146 queue_work(tpacpi_wq, &data->work);
5147 }
5148
5149 static int led_sysfs_blink_set(struct led_classdev *led_cdev,
5150 unsigned long *delay_on, unsigned long *delay_off)
5151 {
5152 struct tpacpi_led_classdev *data = container_of(led_cdev,
5153 struct tpacpi_led_classdev, led_classdev);
5154
5155 /* Can we choose the flash rate? */
5156 if (*delay_on == 0 && *delay_off == 0) {
5157 /* yes. set them to the hardware blink rate (1 Hz) */
5158 *delay_on = 500; /* ms */
5159 *delay_off = 500; /* ms */
5160 } else if ((*delay_on != 500) || (*delay_off != 500))
5161 return -EINVAL;
5162
5163 data->new_state = TPACPI_LED_BLINK;
5164 queue_work(tpacpi_wq, &data->work);
5165
5166 return 0;
5167 }
5168
5169 static enum led_brightness led_sysfs_get(struct led_classdev *led_cdev)
5170 {
5171 int rc;
5172
5173 struct tpacpi_led_classdev *data = container_of(led_cdev,
5174 struct tpacpi_led_classdev, led_classdev);
5175
5176 rc = led_get_status(data->led);
5177
5178 if (rc == TPACPI_LED_OFF || rc < 0)
5179 rc = LED_OFF; /* no error handling in led class :( */
5180 else
5181 rc = LED_FULL;
5182
5183 return rc;
5184 }
5185
5186 static void led_exit(void)
5187 {
5188 unsigned int i;
5189
5190 for (i = 0; i < TPACPI_LED_NUMLEDS; i++) {
5191 if (tpacpi_leds[i].led_classdev.name)
5192 led_classdev_unregister(&tpacpi_leds[i].led_classdev);
5193 }
5194
5195 kfree(tpacpi_leds);
5196 }
5197
5198 static int __init tpacpi_init_led(unsigned int led)
5199 {
5200 int rc;
5201
5202 tpacpi_leds[led].led = led;
5203
5204 /* LEDs with no name don't get registered */
5205 if (!tpacpi_led_names[led])
5206 return 0;
5207
5208 tpacpi_leds[led].led_classdev.brightness_set = &led_sysfs_set;
5209 tpacpi_leds[led].led_classdev.blink_set = &led_sysfs_blink_set;
5210 if (led_supported == TPACPI_LED_570)
5211 tpacpi_leds[led].led_classdev.brightness_get =
5212 &led_sysfs_get;
5213
5214 tpacpi_leds[led].led_classdev.name = tpacpi_led_names[led];
5215
5216 INIT_WORK(&tpacpi_leds[led].work, led_set_status_worker);
5217
5218 rc = led_classdev_register(&tpacpi_pdev->dev,
5219 &tpacpi_leds[led].led_classdev);
5220 if (rc < 0)
5221 tpacpi_leds[led].led_classdev.name = NULL;
5222
5223 return rc;
5224 }
5225
5226 static const struct tpacpi_quirk led_useful_qtable[] __initconst = {
5227 TPACPI_Q_IBM('1', 'E', 0x009f), /* A30 */
5228 TPACPI_Q_IBM('1', 'N', 0x009f), /* A31 */
5229 TPACPI_Q_IBM('1', 'G', 0x009f), /* A31 */
5230
5231 TPACPI_Q_IBM('1', 'I', 0x0097), /* T30 */
5232 TPACPI_Q_IBM('1', 'R', 0x0097), /* T40, T41, T42, R50, R51 */
5233 TPACPI_Q_IBM('7', '0', 0x0097), /* T43, R52 */
5234 TPACPI_Q_IBM('1', 'Y', 0x0097), /* T43 */
5235 TPACPI_Q_IBM('1', 'W', 0x0097), /* R50e */
5236 TPACPI_Q_IBM('1', 'V', 0x0097), /* R51 */
5237 TPACPI_Q_IBM('7', '8', 0x0097), /* R51e */
5238 TPACPI_Q_IBM('7', '6', 0x0097), /* R52 */
5239
5240 TPACPI_Q_IBM('1', 'K', 0x00bf), /* X30 */
5241 TPACPI_Q_IBM('1', 'Q', 0x00bf), /* X31, X32 */
5242 TPACPI_Q_IBM('1', 'U', 0x00bf), /* X40 */
5243 TPACPI_Q_IBM('7', '4', 0x00bf), /* X41 */
5244 TPACPI_Q_IBM('7', '5', 0x00bf), /* X41t */
5245
5246 TPACPI_Q_IBM('7', '9', 0x1f97), /* T60 (1) */
5247 TPACPI_Q_IBM('7', '7', 0x1f97), /* Z60* (1) */
5248 TPACPI_Q_IBM('7', 'F', 0x1f97), /* Z61* (1) */
5249 TPACPI_Q_IBM('7', 'B', 0x1fb7), /* X60 (1) */
5250
5251 /* (1) - may have excess leds enabled on MSB */
5252
5253 /* Defaults (order matters, keep last, don't reorder!) */
5254 { /* Lenovo */
5255 .vendor = PCI_VENDOR_ID_LENOVO,
5256 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY,
5257 .quirks = 0x1fffU,
5258 },
5259 { /* IBM ThinkPads with no EC version string */
5260 .vendor = PCI_VENDOR_ID_IBM,
5261 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_UNKNOWN,
5262 .quirks = 0x00ffU,
5263 },
5264 { /* IBM ThinkPads with EC version string */
5265 .vendor = PCI_VENDOR_ID_IBM,
5266 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY,
5267 .quirks = 0x00bfU,
5268 },
5269 };
5270
5271 #undef TPACPI_LEDQ_IBM
5272 #undef TPACPI_LEDQ_LNV
5273
5274 static int __init led_init(struct ibm_init_struct *iibm)
5275 {
5276 unsigned int i;
5277 int rc;
5278 unsigned long useful_leds;
5279
5280 vdbg_printk(TPACPI_DBG_INIT, "initializing LED subdriver\n");
5281
5282 TPACPI_ACPIHANDLE_INIT(led);
5283
5284 if (!led_handle)
5285 /* led not supported on R30, R31 */
5286 led_supported = TPACPI_LED_NONE;
5287 else if (strlencmp(led_path, "SLED") == 0)
5288 /* 570 */
5289 led_supported = TPACPI_LED_570;
5290 else if (strlencmp(led_path, "SYSL") == 0)
5291 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
5292 led_supported = TPACPI_LED_OLD;
5293 else
5294 /* all others */
5295 led_supported = TPACPI_LED_NEW;
5296
5297 vdbg_printk(TPACPI_DBG_INIT, "LED commands are %s, mode %d\n",
5298 str_supported(led_supported), led_supported);
5299
5300 if (led_supported == TPACPI_LED_NONE)
5301 return 1;
5302
5303 tpacpi_leds = kzalloc(sizeof(*tpacpi_leds) * TPACPI_LED_NUMLEDS,
5304 GFP_KERNEL);
5305 if (!tpacpi_leds) {
5306 printk(TPACPI_ERR "Out of memory for LED data\n");
5307 return -ENOMEM;
5308 }
5309
5310 useful_leds = tpacpi_check_quirks(led_useful_qtable,
5311 ARRAY_SIZE(led_useful_qtable));
5312
5313 for (i = 0; i < TPACPI_LED_NUMLEDS; i++) {
5314 if (!tpacpi_is_led_restricted(i) &&
5315 test_bit(i, &useful_leds)) {
5316 rc = tpacpi_init_led(i);
5317 if (rc < 0) {
5318 led_exit();
5319 return rc;
5320 }
5321 }
5322 }
5323
5324 #ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS
5325 printk(TPACPI_NOTICE
5326 "warning: userspace override of important "
5327 "firmware LEDs is enabled\n");
5328 #endif
5329 return 0;
5330 }
5331
5332 #define str_led_status(s) \
5333 ((s) == TPACPI_LED_OFF ? "off" : \
5334 ((s) == TPACPI_LED_ON ? "on" : "blinking"))
5335
5336 static int led_read(struct seq_file *m)
5337 {
5338 if (!led_supported) {
5339 seq_printf(m, "status:\t\tnot supported\n");
5340 return 0;
5341 }
5342 seq_printf(m, "status:\t\tsupported\n");
5343
5344 if (led_supported == TPACPI_LED_570) {
5345 /* 570 */
5346 int i, status;
5347 for (i = 0; i < 8; i++) {
5348 status = led_get_status(i);
5349 if (status < 0)
5350 return -EIO;
5351 seq_printf(m, "%d:\t\t%s\n",
5352 i, str_led_status(status));
5353 }
5354 }
5355
5356 seq_printf(m, "commands:\t"
5357 "<led> on, <led> off, <led> blink (<led> is 0-15)\n");
5358
5359 return 0;
5360 }
5361
5362 static int led_write(char *buf)
5363 {
5364 char *cmd;
5365 int led, rc;
5366 enum led_status_t s;
5367
5368 if (!led_supported)
5369 return -ENODEV;
5370
5371 while ((cmd = next_cmd(&buf))) {
5372 if (sscanf(cmd, "%d", &led) != 1 || led < 0 || led > 15)
5373 return -EINVAL;
5374
5375 if (strstr(cmd, "off")) {
5376 s = TPACPI_LED_OFF;
5377 } else if (strstr(cmd, "on")) {
5378 s = TPACPI_LED_ON;
5379 } else if (strstr(cmd, "blink")) {
5380 s = TPACPI_LED_BLINK;
5381 } else {
5382 return -EINVAL;
5383 }
5384
5385 rc = led_set_status(led, s);
5386 if (rc < 0)
5387 return rc;
5388 }
5389
5390 return 0;
5391 }
5392
5393 static struct ibm_struct led_driver_data = {
5394 .name = "led",
5395 .read = led_read,
5396 .write = led_write,
5397 .exit = led_exit,
5398 };
5399
5400 /*************************************************************************
5401 * Beep subdriver
5402 */
5403
5404 TPACPI_HANDLE(beep, ec, "BEEP"); /* all except R30, R31 */
5405
5406 #define TPACPI_BEEP_Q1 0x0001
5407
5408 static const struct tpacpi_quirk beep_quirk_table[] __initconst = {
5409 TPACPI_Q_IBM('I', 'M', TPACPI_BEEP_Q1), /* 570 */
5410 TPACPI_Q_IBM('I', 'U', TPACPI_BEEP_Q1), /* 570E - unverified */
5411 };
5412
5413 static int __init beep_init(struct ibm_init_struct *iibm)
5414 {
5415 unsigned long quirks;
5416
5417 vdbg_printk(TPACPI_DBG_INIT, "initializing beep subdriver\n");
5418
5419 TPACPI_ACPIHANDLE_INIT(beep);
5420
5421 vdbg_printk(TPACPI_DBG_INIT, "beep is %s\n",
5422 str_supported(beep_handle != NULL));
5423
5424 quirks = tpacpi_check_quirks(beep_quirk_table,
5425 ARRAY_SIZE(beep_quirk_table));
5426
5427 tp_features.beep_needs_two_args = !!(quirks & TPACPI_BEEP_Q1);
5428
5429 return (beep_handle)? 0 : 1;
5430 }
5431
5432 static int beep_read(struct seq_file *m)
5433 {
5434 if (!beep_handle)
5435 seq_printf(m, "status:\t\tnot supported\n");
5436 else {
5437 seq_printf(m, "status:\t\tsupported\n");
5438 seq_printf(m, "commands:\t<cmd> (<cmd> is 0-17)\n");
5439 }
5440
5441 return 0;
5442 }
5443
5444 static int beep_write(char *buf)
5445 {
5446 char *cmd;
5447 int beep_cmd;
5448
5449 if (!beep_handle)
5450 return -ENODEV;
5451
5452 while ((cmd = next_cmd(&buf))) {
5453 if (sscanf(cmd, "%u", &beep_cmd) == 1 &&
5454 beep_cmd >= 0 && beep_cmd <= 17) {
5455 /* beep_cmd set */
5456 } else
5457 return -EINVAL;
5458 if (tp_features.beep_needs_two_args) {
5459 if (!acpi_evalf(beep_handle, NULL, NULL, "vdd",
5460 beep_cmd, 0))
5461 return -EIO;
5462 } else {
5463 if (!acpi_evalf(beep_handle, NULL, NULL, "vd",
5464 beep_cmd))
5465 return -EIO;
5466 }
5467 }
5468
5469 return 0;
5470 }
5471
5472 static struct ibm_struct beep_driver_data = {
5473 .name = "beep",
5474 .read = beep_read,
5475 .write = beep_write,
5476 };
5477
5478 /*************************************************************************
5479 * Thermal subdriver
5480 */
5481
5482 enum thermal_access_mode {
5483 TPACPI_THERMAL_NONE = 0, /* No thermal support */
5484 TPACPI_THERMAL_ACPI_TMP07, /* Use ACPI TMP0-7 */
5485 TPACPI_THERMAL_ACPI_UPDT, /* Use ACPI TMP0-7 with UPDT */
5486 TPACPI_THERMAL_TPEC_8, /* Use ACPI EC regs, 8 sensors */
5487 TPACPI_THERMAL_TPEC_16, /* Use ACPI EC regs, 16 sensors */
5488 };
5489
5490 enum { /* TPACPI_THERMAL_TPEC_* */
5491 TP_EC_THERMAL_TMP0 = 0x78, /* ACPI EC regs TMP 0..7 */
5492 TP_EC_THERMAL_TMP8 = 0xC0, /* ACPI EC regs TMP 8..15 */
5493 TP_EC_THERMAL_TMP_NA = -128, /* ACPI EC sensor not available */
5494
5495 TPACPI_THERMAL_SENSOR_NA = -128000, /* Sensor not available */
5496 };
5497
5498
5499 #define TPACPI_MAX_THERMAL_SENSORS 16 /* Max thermal sensors supported */
5500 struct ibm_thermal_sensors_struct {
5501 s32 temp[TPACPI_MAX_THERMAL_SENSORS];
5502 };
5503
5504 static enum thermal_access_mode thermal_read_mode;
5505
5506 /* idx is zero-based */
5507 static int thermal_get_sensor(int idx, s32 *value)
5508 {
5509 int t;
5510 s8 tmp;
5511 char tmpi[5];
5512
5513 t = TP_EC_THERMAL_TMP0;
5514
5515 switch (thermal_read_mode) {
5516 #if TPACPI_MAX_THERMAL_SENSORS >= 16
5517 case TPACPI_THERMAL_TPEC_16:
5518 if (idx >= 8 && idx <= 15) {
5519 t = TP_EC_THERMAL_TMP8;
5520 idx -= 8;
5521 }
5522 /* fallthrough */
5523 #endif
5524 case TPACPI_THERMAL_TPEC_8:
5525 if (idx <= 7) {
5526 if (!acpi_ec_read(t + idx, &tmp))
5527 return -EIO;
5528 *value = tmp * 1000;
5529 return 0;
5530 }
5531 break;
5532
5533 case TPACPI_THERMAL_ACPI_UPDT:
5534 if (idx <= 7) {
5535 snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
5536 if (!acpi_evalf(ec_handle, NULL, "UPDT", "v"))
5537 return -EIO;
5538 if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
5539 return -EIO;
5540 *value = (t - 2732) * 100;
5541 return 0;
5542 }
5543 break;
5544
5545 case TPACPI_THERMAL_ACPI_TMP07:
5546 if (idx <= 7) {
5547 snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
5548 if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
5549 return -EIO;
5550 if (t > 127 || t < -127)
5551 t = TP_EC_THERMAL_TMP_NA;
5552 *value = t * 1000;
5553 return 0;
5554 }
5555 break;
5556
5557 case TPACPI_THERMAL_NONE:
5558 default:
5559 return -ENOSYS;
5560 }
5561
5562 return -EINVAL;
5563 }
5564
5565 static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s)
5566 {
5567 int res, i;
5568 int n;
5569
5570 n = 8;
5571 i = 0;
5572
5573 if (!s)
5574 return -EINVAL;
5575
5576 if (thermal_read_mode == TPACPI_THERMAL_TPEC_16)
5577 n = 16;
5578
5579 for (i = 0 ; i < n; i++) {
5580 res = thermal_get_sensor(i, &s->temp[i]);
5581 if (res)
5582 return res;
5583 }
5584
5585 return n;
5586 }
5587
5588 static void thermal_dump_all_sensors(void)
5589 {
5590 int n, i;
5591 struct ibm_thermal_sensors_struct t;
5592
5593 n = thermal_get_sensors(&t);
5594 if (n <= 0)
5595 return;
5596
5597 printk(TPACPI_NOTICE
5598 "temperatures (Celsius):");
5599
5600 for (i = 0; i < n; i++) {
5601 if (t.temp[i] != TPACPI_THERMAL_SENSOR_NA)
5602 printk(KERN_CONT " %d", (int)(t.temp[i] / 1000));
5603 else
5604 printk(KERN_CONT " N/A");
5605 }
5606
5607 printk(KERN_CONT "\n");
5608 }
5609
5610 /* sysfs temp##_input -------------------------------------------------- */
5611
5612 static ssize_t thermal_temp_input_show(struct device *dev,
5613 struct device_attribute *attr,
5614 char *buf)
5615 {
5616 struct sensor_device_attribute *sensor_attr =
5617 to_sensor_dev_attr(attr);
5618 int idx = sensor_attr->index;
5619 s32 value;
5620 int res;
5621
5622 res = thermal_get_sensor(idx, &value);
5623 if (res)
5624 return res;
5625 if (value == TPACPI_THERMAL_SENSOR_NA)
5626 return -ENXIO;
5627
5628 return snprintf(buf, PAGE_SIZE, "%d\n", value);
5629 }
5630
5631 #define THERMAL_SENSOR_ATTR_TEMP(_idxA, _idxB) \
5632 SENSOR_ATTR(temp##_idxA##_input, S_IRUGO, \
5633 thermal_temp_input_show, NULL, _idxB)
5634
5635 static struct sensor_device_attribute sensor_dev_attr_thermal_temp_input[] = {
5636 THERMAL_SENSOR_ATTR_TEMP(1, 0),
5637 THERMAL_SENSOR_ATTR_TEMP(2, 1),
5638 THERMAL_SENSOR_ATTR_TEMP(3, 2),
5639 THERMAL_SENSOR_ATTR_TEMP(4, 3),
5640 THERMAL_SENSOR_ATTR_TEMP(5, 4),
5641 THERMAL_SENSOR_ATTR_TEMP(6, 5),
5642 THERMAL_SENSOR_ATTR_TEMP(7, 6),
5643 THERMAL_SENSOR_ATTR_TEMP(8, 7),
5644 THERMAL_SENSOR_ATTR_TEMP(9, 8),
5645 THERMAL_SENSOR_ATTR_TEMP(10, 9),
5646 THERMAL_SENSOR_ATTR_TEMP(11, 10),
5647 THERMAL_SENSOR_ATTR_TEMP(12, 11),
5648 THERMAL_SENSOR_ATTR_TEMP(13, 12),
5649 THERMAL_SENSOR_ATTR_TEMP(14, 13),
5650 THERMAL_SENSOR_ATTR_TEMP(15, 14),
5651 THERMAL_SENSOR_ATTR_TEMP(16, 15),
5652 };
5653
5654 #define THERMAL_ATTRS(X) \
5655 &sensor_dev_attr_thermal_temp_input[X].dev_attr.attr
5656
5657 static struct attribute *thermal_temp_input_attr[] = {
5658 THERMAL_ATTRS(8),
5659 THERMAL_ATTRS(9),
5660 THERMAL_ATTRS(10),
5661 THERMAL_ATTRS(11),
5662 THERMAL_ATTRS(12),
5663 THERMAL_ATTRS(13),
5664 THERMAL_ATTRS(14),
5665 THERMAL_ATTRS(15),
5666 THERMAL_ATTRS(0),
5667 THERMAL_ATTRS(1),
5668 THERMAL_ATTRS(2),
5669 THERMAL_ATTRS(3),
5670 THERMAL_ATTRS(4),
5671 THERMAL_ATTRS(5),
5672 THERMAL_ATTRS(6),
5673 THERMAL_ATTRS(7),
5674 NULL
5675 };
5676
5677 static const struct attribute_group thermal_temp_input16_group = {
5678 .attrs = thermal_temp_input_attr
5679 };
5680
5681 static const struct attribute_group thermal_temp_input8_group = {
5682 .attrs = &thermal_temp_input_attr[8]
5683 };
5684
5685 #undef THERMAL_SENSOR_ATTR_TEMP
5686 #undef THERMAL_ATTRS
5687
5688 /* --------------------------------------------------------------------- */
5689
5690 static int __init thermal_init(struct ibm_init_struct *iibm)
5691 {
5692 u8 t, ta1, ta2;
5693 int i;
5694 int acpi_tmp7;
5695 int res;
5696
5697 vdbg_printk(TPACPI_DBG_INIT, "initializing thermal subdriver\n");
5698
5699 acpi_tmp7 = acpi_evalf(ec_handle, NULL, "TMP7", "qv");
5700
5701 if (thinkpad_id.ec_model) {
5702 /*
5703 * Direct EC access mode: sensors at registers
5704 * 0x78-0x7F, 0xC0-0xC7. Registers return 0x00 for
5705 * non-implemented, thermal sensors return 0x80 when
5706 * not available
5707 */
5708
5709 ta1 = ta2 = 0;
5710 for (i = 0; i < 8; i++) {
5711 if (acpi_ec_read(TP_EC_THERMAL_TMP0 + i, &t)) {
5712 ta1 |= t;
5713 } else {
5714 ta1 = 0;
5715 break;
5716 }
5717 if (acpi_ec_read(TP_EC_THERMAL_TMP8 + i, &t)) {
5718 ta2 |= t;
5719 } else {
5720 ta1 = 0;
5721 break;
5722 }
5723 }
5724 if (ta1 == 0) {
5725 /* This is sheer paranoia, but we handle it anyway */
5726 if (acpi_tmp7) {
5727 printk(TPACPI_ERR
5728 "ThinkPad ACPI EC access misbehaving, "
5729 "falling back to ACPI TMPx access "
5730 "mode\n");
5731 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
5732 } else {
5733 printk(TPACPI_ERR
5734 "ThinkPad ACPI EC access misbehaving, "
5735 "disabling thermal sensors access\n");
5736 thermal_read_mode = TPACPI_THERMAL_NONE;
5737 }
5738 } else {
5739 thermal_read_mode =
5740 (ta2 != 0) ?
5741 TPACPI_THERMAL_TPEC_16 : TPACPI_THERMAL_TPEC_8;
5742 }
5743 } else if (acpi_tmp7) {
5744 if (acpi_evalf(ec_handle, NULL, "UPDT", "qv")) {
5745 /* 600e/x, 770e, 770x */
5746 thermal_read_mode = TPACPI_THERMAL_ACPI_UPDT;
5747 } else {
5748 /* Standard ACPI TMPx access, max 8 sensors */
5749 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
5750 }
5751 } else {
5752 /* temperatures not supported on 570, G4x, R30, R31, R32 */
5753 thermal_read_mode = TPACPI_THERMAL_NONE;
5754 }
5755
5756 vdbg_printk(TPACPI_DBG_INIT, "thermal is %s, mode %d\n",
5757 str_supported(thermal_read_mode != TPACPI_THERMAL_NONE),
5758 thermal_read_mode);
5759
5760 switch (thermal_read_mode) {
5761 case TPACPI_THERMAL_TPEC_16:
5762 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
5763 &thermal_temp_input16_group);
5764 if (res)
5765 return res;
5766 break;
5767 case TPACPI_THERMAL_TPEC_8:
5768 case TPACPI_THERMAL_ACPI_TMP07:
5769 case TPACPI_THERMAL_ACPI_UPDT:
5770 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
5771 &thermal_temp_input8_group);
5772 if (res)
5773 return res;
5774 break;
5775 case TPACPI_THERMAL_NONE:
5776 default:
5777 return 1;
5778 }
5779
5780 return 0;
5781 }
5782
5783 static void thermal_exit(void)
5784 {
5785 switch (thermal_read_mode) {
5786 case TPACPI_THERMAL_TPEC_16:
5787 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
5788 &thermal_temp_input16_group);
5789 break;
5790 case TPACPI_THERMAL_TPEC_8:
5791 case TPACPI_THERMAL_ACPI_TMP07:
5792 case TPACPI_THERMAL_ACPI_UPDT:
5793 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
5794 &thermal_temp_input8_group);
5795 break;
5796 case TPACPI_THERMAL_NONE:
5797 default:
5798 break;
5799 }
5800 }
5801
5802 static int thermal_read(struct seq_file *m)
5803 {
5804 int n, i;
5805 struct ibm_thermal_sensors_struct t;
5806
5807 n = thermal_get_sensors(&t);
5808 if (unlikely(n < 0))
5809 return n;
5810
5811 seq_printf(m, "temperatures:\t");
5812
5813 if (n > 0) {
5814 for (i = 0; i < (n - 1); i++)
5815 seq_printf(m, "%d ", t.temp[i] / 1000);
5816 seq_printf(m, "%d\n", t.temp[i] / 1000);
5817 } else
5818 seq_printf(m, "not supported\n");
5819
5820 return 0;
5821 }
5822
5823 static struct ibm_struct thermal_driver_data = {
5824 .name = "thermal",
5825 .read = thermal_read,
5826 .exit = thermal_exit,
5827 };
5828
5829 /*************************************************************************
5830 * EC Dump subdriver
5831 */
5832
5833 static u8 ecdump_regs[256];
5834
5835 static int ecdump_read(struct seq_file *m)
5836 {
5837 int i, j;
5838 u8 v;
5839
5840 seq_printf(m, "EC "
5841 " +00 +01 +02 +03 +04 +05 +06 +07"
5842 " +08 +09 +0a +0b +0c +0d +0e +0f\n");
5843 for (i = 0; i < 256; i += 16) {
5844 seq_printf(m, "EC 0x%02x:", i);
5845 for (j = 0; j < 16; j++) {
5846 if (!acpi_ec_read(i + j, &v))
5847 break;
5848 if (v != ecdump_regs[i + j])
5849 seq_printf(m, " *%02x", v);
5850 else
5851 seq_printf(m, " %02x", v);
5852 ecdump_regs[i + j] = v;
5853 }
5854 seq_putc(m, '\n');
5855 if (j != 16)
5856 break;
5857 }
5858
5859 /* These are way too dangerous to advertise openly... */
5860 #if 0
5861 seq_printf(m, "commands:\t0x<offset> 0x<value>"
5862 " (<offset> is 00-ff, <value> is 00-ff)\n");
5863 seq_printf(m, "commands:\t0x<offset> <value> "
5864 " (<offset> is 00-ff, <value> is 0-255)\n");
5865 #endif
5866 return 0;
5867 }
5868
5869 static int ecdump_write(char *buf)
5870 {
5871 char *cmd;
5872 int i, v;
5873
5874 while ((cmd = next_cmd(&buf))) {
5875 if (sscanf(cmd, "0x%x 0x%x", &i, &v) == 2) {
5876 /* i and v set */
5877 } else if (sscanf(cmd, "0x%x %u", &i, &v) == 2) {
5878 /* i and v set */
5879 } else
5880 return -EINVAL;
5881 if (i >= 0 && i < 256 && v >= 0 && v < 256) {
5882 if (!acpi_ec_write(i, v))
5883 return -EIO;
5884 } else
5885 return -EINVAL;
5886 }
5887
5888 return 0;
5889 }
5890
5891 static struct ibm_struct ecdump_driver_data = {
5892 .name = "ecdump",
5893 .read = ecdump_read,
5894 .write = ecdump_write,
5895 .flags.experimental = 1,
5896 };
5897
5898 /*************************************************************************
5899 * Backlight/brightness subdriver
5900 */
5901
5902 #define TPACPI_BACKLIGHT_DEV_NAME "thinkpad_screen"
5903
5904 /*
5905 * ThinkPads can read brightness from two places: EC HBRV (0x31), or
5906 * CMOS NVRAM byte 0x5E, bits 0-3.
5907 *
5908 * EC HBRV (0x31) has the following layout
5909 * Bit 7: unknown function
5910 * Bit 6: unknown function
5911 * Bit 5: Z: honour scale changes, NZ: ignore scale changes
5912 * Bit 4: must be set to zero to avoid problems
5913 * Bit 3-0: backlight brightness level
5914 *
5915 * brightness_get_raw returns status data in the HBRV layout
5916 *
5917 * WARNING: The X61 has been verified to use HBRV for something else, so
5918 * this should be used _only_ on IBM ThinkPads, and maybe with some careful
5919 * testing on the very early *60 Lenovo models...
5920 */
5921
5922 enum {
5923 TP_EC_BACKLIGHT = 0x31,
5924
5925 /* TP_EC_BACKLIGHT bitmasks */
5926 TP_EC_BACKLIGHT_LVLMSK = 0x1F,
5927 TP_EC_BACKLIGHT_CMDMSK = 0xE0,
5928 TP_EC_BACKLIGHT_MAPSW = 0x20,
5929 };
5930
5931 enum tpacpi_brightness_access_mode {
5932 TPACPI_BRGHT_MODE_AUTO = 0, /* Not implemented yet */
5933 TPACPI_BRGHT_MODE_EC, /* EC control */
5934 TPACPI_BRGHT_MODE_UCMS_STEP, /* UCMS step-based control */
5935 TPACPI_BRGHT_MODE_ECNVRAM, /* EC control w/ NVRAM store */
5936 TPACPI_BRGHT_MODE_MAX
5937 };
5938
5939 static struct backlight_device *ibm_backlight_device;
5940
5941 static enum tpacpi_brightness_access_mode brightness_mode =
5942 TPACPI_BRGHT_MODE_MAX;
5943
5944 static unsigned int brightness_enable = 2; /* 2 = auto, 0 = no, 1 = yes */
5945
5946 static struct mutex brightness_mutex;
5947
5948 /* NVRAM brightness access,
5949 * call with brightness_mutex held! */
5950 static unsigned int tpacpi_brightness_nvram_get(void)
5951 {
5952 u8 lnvram;
5953
5954 lnvram = (nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS)
5955 & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
5956 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
5957 lnvram &= (tp_features.bright_16levels) ? 0x0f : 0x07;
5958
5959 return lnvram;
5960 }
5961
5962 static void tpacpi_brightness_checkpoint_nvram(void)
5963 {
5964 u8 lec = 0;
5965 u8 b_nvram;
5966
5967 if (brightness_mode != TPACPI_BRGHT_MODE_ECNVRAM)
5968 return;
5969
5970 vdbg_printk(TPACPI_DBG_BRGHT,
5971 "trying to checkpoint backlight level to NVRAM...\n");
5972
5973 if (mutex_lock_killable(&brightness_mutex) < 0)
5974 return;
5975
5976 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
5977 goto unlock;
5978 lec &= TP_EC_BACKLIGHT_LVLMSK;
5979 b_nvram = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS);
5980
5981 if (lec != ((b_nvram & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
5982 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS)) {
5983 /* NVRAM needs update */
5984 b_nvram &= ~(TP_NVRAM_MASK_LEVEL_BRIGHTNESS <<
5985 TP_NVRAM_POS_LEVEL_BRIGHTNESS);
5986 b_nvram |= lec;
5987 nvram_write_byte(b_nvram, TP_NVRAM_ADDR_BRIGHTNESS);
5988 dbg_printk(TPACPI_DBG_BRGHT,
5989 "updated NVRAM backlight level to %u (0x%02x)\n",
5990 (unsigned int) lec, (unsigned int) b_nvram);
5991 } else
5992 vdbg_printk(TPACPI_DBG_BRGHT,
5993 "NVRAM backlight level already is %u (0x%02x)\n",
5994 (unsigned int) lec, (unsigned int) b_nvram);
5995
5996 unlock:
5997 mutex_unlock(&brightness_mutex);
5998 }
5999
6000
6001 /* call with brightness_mutex held! */
6002 static int tpacpi_brightness_get_raw(int *status)
6003 {
6004 u8 lec = 0;
6005
6006 switch (brightness_mode) {
6007 case TPACPI_BRGHT_MODE_UCMS_STEP:
6008 *status = tpacpi_brightness_nvram_get();
6009 return 0;
6010 case TPACPI_BRGHT_MODE_EC:
6011 case TPACPI_BRGHT_MODE_ECNVRAM:
6012 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
6013 return -EIO;
6014 *status = lec;
6015 return 0;
6016 default:
6017 return -ENXIO;
6018 }
6019 }
6020
6021 /* call with brightness_mutex held! */
6022 /* do NOT call with illegal backlight level value */
6023 static int tpacpi_brightness_set_ec(unsigned int value)
6024 {
6025 u8 lec = 0;
6026
6027 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
6028 return -EIO;
6029
6030 if (unlikely(!acpi_ec_write(TP_EC_BACKLIGHT,
6031 (lec & TP_EC_BACKLIGHT_CMDMSK) |
6032 (value & TP_EC_BACKLIGHT_LVLMSK))))
6033 return -EIO;
6034
6035 return 0;
6036 }
6037
6038 /* call with brightness_mutex held! */
6039 static int tpacpi_brightness_set_ucmsstep(unsigned int value)
6040 {
6041 int cmos_cmd, inc;
6042 unsigned int current_value, i;
6043
6044 current_value = tpacpi_brightness_nvram_get();
6045
6046 if (value == current_value)
6047 return 0;
6048
6049 cmos_cmd = (value > current_value) ?
6050 TP_CMOS_BRIGHTNESS_UP :
6051 TP_CMOS_BRIGHTNESS_DOWN;
6052 inc = (value > current_value) ? 1 : -1;
6053
6054 for (i = current_value; i != value; i += inc)
6055 if (issue_thinkpad_cmos_command(cmos_cmd))
6056 return -EIO;
6057
6058 return 0;
6059 }
6060
6061 /* May return EINTR which can always be mapped to ERESTARTSYS */
6062 static int brightness_set(unsigned int value)
6063 {
6064 int res;
6065
6066 if (value > ((tp_features.bright_16levels)? 15 : 7) ||
6067 value < 0)
6068 return -EINVAL;
6069
6070 vdbg_printk(TPACPI_DBG_BRGHT,
6071 "set backlight level to %d\n", value);
6072
6073 res = mutex_lock_killable(&brightness_mutex);
6074 if (res < 0)
6075 return res;
6076
6077 switch (brightness_mode) {
6078 case TPACPI_BRGHT_MODE_EC:
6079 case TPACPI_BRGHT_MODE_ECNVRAM:
6080 res = tpacpi_brightness_set_ec(value);
6081 break;
6082 case TPACPI_BRGHT_MODE_UCMS_STEP:
6083 res = tpacpi_brightness_set_ucmsstep(value);
6084 break;
6085 default:
6086 res = -ENXIO;
6087 }
6088
6089 mutex_unlock(&brightness_mutex);
6090 return res;
6091 }
6092
6093 /* sysfs backlight class ----------------------------------------------- */
6094
6095 static int brightness_update_status(struct backlight_device *bd)
6096 {
6097 unsigned int level =
6098 (bd->props.fb_blank == FB_BLANK_UNBLANK &&
6099 bd->props.power == FB_BLANK_UNBLANK) ?
6100 bd->props.brightness : 0;
6101
6102 dbg_printk(TPACPI_DBG_BRGHT,
6103 "backlight: attempt to set level to %d\n",
6104 level);
6105
6106 /* it is the backlight class's job (caller) to handle
6107 * EINTR and other errors properly */
6108 return brightness_set(level);
6109 }
6110
6111 static int brightness_get(struct backlight_device *bd)
6112 {
6113 int status, res;
6114
6115 res = mutex_lock_killable(&brightness_mutex);
6116 if (res < 0)
6117 return 0;
6118
6119 res = tpacpi_brightness_get_raw(&status);
6120
6121 mutex_unlock(&brightness_mutex);
6122
6123 if (res < 0)
6124 return 0;
6125
6126 return status & TP_EC_BACKLIGHT_LVLMSK;
6127 }
6128
6129 static void tpacpi_brightness_notify_change(void)
6130 {
6131 backlight_force_update(ibm_backlight_device,
6132 BACKLIGHT_UPDATE_HOTKEY);
6133 }
6134
6135 static struct backlight_ops ibm_backlight_data = {
6136 .get_brightness = brightness_get,
6137 .update_status = brightness_update_status,
6138 };
6139
6140 /* --------------------------------------------------------------------- */
6141
6142 /*
6143 * These are only useful for models that have only one possibility
6144 * of GPU. If the BIOS model handles both ATI and Intel, don't use
6145 * these quirks.
6146 */
6147 #define TPACPI_BRGHT_Q_NOEC 0x0001 /* Must NOT use EC HBRV */
6148 #define TPACPI_BRGHT_Q_EC 0x0002 /* Should or must use EC HBRV */
6149 #define TPACPI_BRGHT_Q_ASK 0x8000 /* Ask for user report */
6150
6151 static const struct tpacpi_quirk brightness_quirk_table[] __initconst = {
6152 /* Models with ATI GPUs known to require ECNVRAM mode */
6153 TPACPI_Q_IBM('1', 'Y', TPACPI_BRGHT_Q_EC), /* T43/p ATI */
6154
6155 /* Models with ATI GPUs that can use ECNVRAM */
6156 TPACPI_Q_IBM('1', 'R', TPACPI_BRGHT_Q_EC), /* R50,51 T40-42 */
6157 TPACPI_Q_IBM('1', 'Q', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
6158 TPACPI_Q_IBM('7', '6', TPACPI_BRGHT_Q_EC), /* R52 */
6159 TPACPI_Q_IBM('7', '8', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
6160
6161 /* Models with Intel Extreme Graphics 2 */
6162 TPACPI_Q_IBM('1', 'U', TPACPI_BRGHT_Q_NOEC), /* X40 */
6163 TPACPI_Q_IBM('1', 'V', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
6164 TPACPI_Q_IBM('1', 'W', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
6165
6166 /* Models with Intel GMA900 */
6167 TPACPI_Q_IBM('7', '0', TPACPI_BRGHT_Q_NOEC), /* T43, R52 */
6168 TPACPI_Q_IBM('7', '4', TPACPI_BRGHT_Q_NOEC), /* X41 */
6169 TPACPI_Q_IBM('7', '5', TPACPI_BRGHT_Q_NOEC), /* X41 Tablet */
6170 };
6171
6172 static int __init brightness_init(struct ibm_init_struct *iibm)
6173 {
6174 struct backlight_properties props;
6175 int b;
6176 unsigned long quirks;
6177
6178 vdbg_printk(TPACPI_DBG_INIT, "initializing brightness subdriver\n");
6179
6180 mutex_init(&brightness_mutex);
6181
6182 quirks = tpacpi_check_quirks(brightness_quirk_table,
6183 ARRAY_SIZE(brightness_quirk_table));
6184
6185 /*
6186 * We always attempt to detect acpi support, so as to switch
6187 * Lenovo Vista BIOS to ACPI brightness mode even if we are not
6188 * going to publish a backlight interface
6189 */
6190 b = tpacpi_check_std_acpi_brightness_support();
6191 if (b > 0) {
6192
6193 if (acpi_video_backlight_support()) {
6194 if (brightness_enable > 1) {
6195 printk(TPACPI_NOTICE
6196 "Standard ACPI backlight interface "
6197 "available, not loading native one.\n");
6198 return 1;
6199 } else if (brightness_enable == 1) {
6200 printk(TPACPI_NOTICE
6201 "Backlight control force enabled, even if standard "
6202 "ACPI backlight interface is available\n");
6203 }
6204 } else {
6205 if (brightness_enable > 1) {
6206 printk(TPACPI_NOTICE
6207 "Standard ACPI backlight interface not "
6208 "available, thinkpad_acpi native "
6209 "brightness control enabled\n");
6210 }
6211 }
6212 }
6213
6214 if (!brightness_enable) {
6215 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT,
6216 "brightness support disabled by "
6217 "module parameter\n");
6218 return 1;
6219 }
6220
6221 if (b > 16) {
6222 printk(TPACPI_ERR
6223 "Unsupported brightness interface, "
6224 "please contact %s\n", TPACPI_MAIL);
6225 return 1;
6226 }
6227 if (b == 16)
6228 tp_features.bright_16levels = 1;
6229
6230 /*
6231 * Check for module parameter bogosity, note that we
6232 * init brightness_mode to TPACPI_BRGHT_MODE_MAX in order to be
6233 * able to detect "unspecified"
6234 */
6235 if (brightness_mode > TPACPI_BRGHT_MODE_MAX)
6236 return -EINVAL;
6237
6238 /* TPACPI_BRGHT_MODE_AUTO not implemented yet, just use default */
6239 if (brightness_mode == TPACPI_BRGHT_MODE_AUTO ||
6240 brightness_mode == TPACPI_BRGHT_MODE_MAX) {
6241 if (quirks & TPACPI_BRGHT_Q_EC)
6242 brightness_mode = TPACPI_BRGHT_MODE_ECNVRAM;
6243 else
6244 brightness_mode = TPACPI_BRGHT_MODE_UCMS_STEP;
6245
6246 dbg_printk(TPACPI_DBG_BRGHT,
6247 "driver auto-selected brightness_mode=%d\n",
6248 brightness_mode);
6249 }
6250
6251 /* Safety */
6252 if (thinkpad_id.vendor != PCI_VENDOR_ID_IBM &&
6253 (brightness_mode == TPACPI_BRGHT_MODE_ECNVRAM ||
6254 brightness_mode == TPACPI_BRGHT_MODE_EC))
6255 return -EINVAL;
6256
6257 if (tpacpi_brightness_get_raw(&b) < 0)
6258 return 1;
6259
6260 if (tp_features.bright_16levels)
6261 printk(TPACPI_INFO
6262 "detected a 16-level brightness capable ThinkPad\n");
6263
6264 memset(&props, 0, sizeof(struct backlight_properties));
6265 props.max_brightness = (tp_features.bright_16levels) ? 15 : 7;
6266 ibm_backlight_device = backlight_device_register(TPACPI_BACKLIGHT_DEV_NAME,
6267 NULL, NULL,
6268 &ibm_backlight_data,
6269 &props);
6270 if (IS_ERR(ibm_backlight_device)) {
6271 int rc = PTR_ERR(ibm_backlight_device);
6272 ibm_backlight_device = NULL;
6273 printk(TPACPI_ERR "Could not register backlight device\n");
6274 return rc;
6275 }
6276 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT,
6277 "brightness is supported\n");
6278
6279 if (quirks & TPACPI_BRGHT_Q_ASK) {
6280 printk(TPACPI_NOTICE
6281 "brightness: will use unverified default: "
6282 "brightness_mode=%d\n", brightness_mode);
6283 printk(TPACPI_NOTICE
6284 "brightness: please report to %s whether it works well "
6285 "or not on your ThinkPad\n", TPACPI_MAIL);
6286 }
6287
6288 ibm_backlight_device->props.brightness = b & TP_EC_BACKLIGHT_LVLMSK;
6289 backlight_update_status(ibm_backlight_device);
6290
6291 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT,
6292 "brightness: registering brightness hotkeys "
6293 "as change notification\n");
6294 tpacpi_hotkey_driver_mask_set(hotkey_driver_mask
6295 | TP_ACPI_HKEY_BRGHTUP_MASK
6296 | TP_ACPI_HKEY_BRGHTDWN_MASK);;
6297 return 0;
6298 }
6299
6300 static void brightness_suspend(pm_message_t state)
6301 {
6302 tpacpi_brightness_checkpoint_nvram();
6303 }
6304
6305 static void brightness_shutdown(void)
6306 {
6307 tpacpi_brightness_checkpoint_nvram();
6308 }
6309
6310 static void brightness_exit(void)
6311 {
6312 if (ibm_backlight_device) {
6313 vdbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_BRGHT,
6314 "calling backlight_device_unregister()\n");
6315 backlight_device_unregister(ibm_backlight_device);
6316 }
6317
6318 tpacpi_brightness_checkpoint_nvram();
6319 }
6320
6321 static int brightness_read(struct seq_file *m)
6322 {
6323 int level;
6324
6325 level = brightness_get(NULL);
6326 if (level < 0) {
6327 seq_printf(m, "level:\t\tunreadable\n");
6328 } else {
6329 seq_printf(m, "level:\t\t%d\n", level);
6330 seq_printf(m, "commands:\tup, down\n");
6331 seq_printf(m, "commands:\tlevel <level>"
6332 " (<level> is 0-%d)\n",
6333 (tp_features.bright_16levels) ? 15 : 7);
6334 }
6335
6336 return 0;
6337 }
6338
6339 static int brightness_write(char *buf)
6340 {
6341 int level;
6342 int rc;
6343 char *cmd;
6344 int max_level = (tp_features.bright_16levels) ? 15 : 7;
6345
6346 level = brightness_get(NULL);
6347 if (level < 0)
6348 return level;
6349
6350 while ((cmd = next_cmd(&buf))) {
6351 if (strlencmp(cmd, "up") == 0) {
6352 if (level < max_level)
6353 level++;
6354 } else if (strlencmp(cmd, "down") == 0) {
6355 if (level > 0)
6356 level--;
6357 } else if (sscanf(cmd, "level %d", &level) == 1 &&
6358 level >= 0 && level <= max_level) {
6359 /* new level set */
6360 } else
6361 return -EINVAL;
6362 }
6363
6364 tpacpi_disclose_usertask("procfs brightness",
6365 "set level to %d\n", level);
6366
6367 /*
6368 * Now we know what the final level should be, so we try to set it.
6369 * Doing it this way makes the syscall restartable in case of EINTR
6370 */
6371 rc = brightness_set(level);
6372 if (!rc && ibm_backlight_device)
6373 backlight_force_update(ibm_backlight_device,
6374 BACKLIGHT_UPDATE_SYSFS);
6375 return (rc == -EINTR)? -ERESTARTSYS : rc;
6376 }
6377
6378 static struct ibm_struct brightness_driver_data = {
6379 .name = "brightness",
6380 .read = brightness_read,
6381 .write = brightness_write,
6382 .exit = brightness_exit,
6383 .suspend = brightness_suspend,
6384 .shutdown = brightness_shutdown,
6385 };
6386
6387 /*************************************************************************
6388 * Volume subdriver
6389 */
6390
6391 /*
6392 * IBM ThinkPads have a simple volume controller with MUTE gating.
6393 * Very early Lenovo ThinkPads follow the IBM ThinkPad spec.
6394 *
6395 * Since the *61 series (and probably also the later *60 series), Lenovo
6396 * ThinkPads only implement the MUTE gate.
6397 *
6398 * EC register 0x30
6399 * Bit 6: MUTE (1 mutes sound)
6400 * Bit 3-0: Volume
6401 * Other bits should be zero as far as we know.
6402 *
6403 * This is also stored in CMOS NVRAM, byte 0x60, bit 6 (MUTE), and
6404 * bits 3-0 (volume). Other bits in NVRAM may have other functions,
6405 * such as bit 7 which is used to detect repeated presses of MUTE,
6406 * and we leave them unchanged.
6407 */
6408
6409 #ifdef CONFIG_THINKPAD_ACPI_ALSA_SUPPORT
6410
6411 #define TPACPI_ALSA_DRVNAME "ThinkPad EC"
6412 #define TPACPI_ALSA_SHRTNAME "ThinkPad Console Audio Control"
6413 #define TPACPI_ALSA_MIXERNAME TPACPI_ALSA_SHRTNAME
6414
6415 static int alsa_index = ~((1 << (SNDRV_CARDS - 3)) - 1); /* last three slots */
6416 static char *alsa_id = "ThinkPadEC";
6417 static int alsa_enable = SNDRV_DEFAULT_ENABLE1;
6418
6419 struct tpacpi_alsa_data {
6420 struct snd_card *card;
6421 struct snd_ctl_elem_id *ctl_mute_id;
6422 struct snd_ctl_elem_id *ctl_vol_id;
6423 };
6424
6425 static struct snd_card *alsa_card;
6426
6427 enum {
6428 TP_EC_AUDIO = 0x30,
6429
6430 /* TP_EC_AUDIO bits */
6431 TP_EC_AUDIO_MUTESW = 6,
6432
6433 /* TP_EC_AUDIO bitmasks */
6434 TP_EC_AUDIO_LVL_MSK = 0x0F,
6435 TP_EC_AUDIO_MUTESW_MSK = (1 << TP_EC_AUDIO_MUTESW),
6436
6437 /* Maximum volume */
6438 TP_EC_VOLUME_MAX = 14,
6439 };
6440
6441 enum tpacpi_volume_access_mode {
6442 TPACPI_VOL_MODE_AUTO = 0, /* Not implemented yet */
6443 TPACPI_VOL_MODE_EC, /* Pure EC control */
6444 TPACPI_VOL_MODE_UCMS_STEP, /* UCMS step-based control: N/A */
6445 TPACPI_VOL_MODE_ECNVRAM, /* EC control w/ NVRAM store */
6446 TPACPI_VOL_MODE_MAX
6447 };
6448
6449 enum tpacpi_volume_capabilities {
6450 TPACPI_VOL_CAP_AUTO = 0, /* Use white/blacklist */
6451 TPACPI_VOL_CAP_VOLMUTE, /* Output vol and mute */
6452 TPACPI_VOL_CAP_MUTEONLY, /* Output mute only */
6453 TPACPI_VOL_CAP_MAX
6454 };
6455
6456 static enum tpacpi_volume_access_mode volume_mode =
6457 TPACPI_VOL_MODE_MAX;
6458
6459 static enum tpacpi_volume_capabilities volume_capabilities;
6460 static int volume_control_allowed;
6461
6462 /*
6463 * Used to syncronize writers to TP_EC_AUDIO and
6464 * TP_NVRAM_ADDR_MIXER, as we need to do read-modify-write
6465 */
6466 static struct mutex volume_mutex;
6467
6468 static void tpacpi_volume_checkpoint_nvram(void)
6469 {
6470 u8 lec = 0;
6471 u8 b_nvram;
6472 u8 ec_mask;
6473
6474 if (volume_mode != TPACPI_VOL_MODE_ECNVRAM)
6475 return;
6476 if (!volume_control_allowed)
6477 return;
6478
6479 vdbg_printk(TPACPI_DBG_MIXER,
6480 "trying to checkpoint mixer state to NVRAM...\n");
6481
6482 if (tp_features.mixer_no_level_control)
6483 ec_mask = TP_EC_AUDIO_MUTESW_MSK;
6484 else
6485 ec_mask = TP_EC_AUDIO_MUTESW_MSK | TP_EC_AUDIO_LVL_MSK;
6486
6487 if (mutex_lock_killable(&volume_mutex) < 0)
6488 return;
6489
6490 if (unlikely(!acpi_ec_read(TP_EC_AUDIO, &lec)))
6491 goto unlock;
6492 lec &= ec_mask;
6493 b_nvram = nvram_read_byte(TP_NVRAM_ADDR_MIXER);
6494
6495 if (lec != (b_nvram & ec_mask)) {
6496 /* NVRAM needs update */
6497 b_nvram &= ~ec_mask;
6498 b_nvram |= lec;
6499 nvram_write_byte(b_nvram, TP_NVRAM_ADDR_MIXER);
6500 dbg_printk(TPACPI_DBG_MIXER,
6501 "updated NVRAM mixer status to 0x%02x (0x%02x)\n",
6502 (unsigned int) lec, (unsigned int) b_nvram);
6503 } else {
6504 vdbg_printk(TPACPI_DBG_MIXER,
6505 "NVRAM mixer status already is 0x%02x (0x%02x)\n",
6506 (unsigned int) lec, (unsigned int) b_nvram);
6507 }
6508
6509 unlock:
6510 mutex_unlock(&volume_mutex);
6511 }
6512
6513 static int volume_get_status_ec(u8 *status)
6514 {
6515 u8 s;
6516
6517 if (!acpi_ec_read(TP_EC_AUDIO, &s))
6518 return -EIO;
6519
6520 *status = s;
6521
6522 dbg_printk(TPACPI_DBG_MIXER, "status 0x%02x\n", s);
6523
6524 return 0;
6525 }
6526
6527 static int volume_get_status(u8 *status)
6528 {
6529 return volume_get_status_ec(status);
6530 }
6531
6532 static int volume_set_status_ec(const u8 status)
6533 {
6534 if (!acpi_ec_write(TP_EC_AUDIO, status))
6535 return -EIO;
6536
6537 dbg_printk(TPACPI_DBG_MIXER, "set EC mixer to 0x%02x\n", status);
6538
6539 return 0;
6540 }
6541
6542 static int volume_set_status(const u8 status)
6543 {
6544 return volume_set_status_ec(status);
6545 }
6546
6547 /* returns < 0 on error, 0 on no change, 1 on change */
6548 static int __volume_set_mute_ec(const bool mute)
6549 {
6550 int rc;
6551 u8 s, n;
6552
6553 if (mutex_lock_killable(&volume_mutex) < 0)
6554 return -EINTR;
6555
6556 rc = volume_get_status_ec(&s);
6557 if (rc)
6558 goto unlock;
6559
6560 n = (mute) ? s | TP_EC_AUDIO_MUTESW_MSK :
6561 s & ~TP_EC_AUDIO_MUTESW_MSK;
6562
6563 if (n != s) {
6564 rc = volume_set_status_ec(n);
6565 if (!rc)
6566 rc = 1;
6567 }
6568
6569 unlock:
6570 mutex_unlock(&volume_mutex);
6571 return rc;
6572 }
6573
6574 static int volume_alsa_set_mute(const bool mute)
6575 {
6576 dbg_printk(TPACPI_DBG_MIXER, "ALSA: trying to %smute\n",
6577 (mute) ? "" : "un");
6578 return __volume_set_mute_ec(mute);
6579 }
6580
6581 static int volume_set_mute(const bool mute)
6582 {
6583 int rc;
6584
6585 dbg_printk(TPACPI_DBG_MIXER, "trying to %smute\n",
6586 (mute) ? "" : "un");
6587
6588 rc = __volume_set_mute_ec(mute);
6589 return (rc < 0) ? rc : 0;
6590 }
6591
6592 /* returns < 0 on error, 0 on no change, 1 on change */
6593 static int __volume_set_volume_ec(const u8 vol)
6594 {
6595 int rc;
6596 u8 s, n;
6597
6598 if (vol > TP_EC_VOLUME_MAX)
6599 return -EINVAL;
6600
6601 if (mutex_lock_killable(&volume_mutex) < 0)
6602 return -EINTR;
6603
6604 rc = volume_get_status_ec(&s);
6605 if (rc)
6606 goto unlock;
6607
6608 n = (s & ~TP_EC_AUDIO_LVL_MSK) | vol;
6609
6610 if (n != s) {
6611 rc = volume_set_status_ec(n);
6612 if (!rc)
6613 rc = 1;
6614 }
6615
6616 unlock:
6617 mutex_unlock(&volume_mutex);
6618 return rc;
6619 }
6620
6621 static int volume_alsa_set_volume(const u8 vol)
6622 {
6623 dbg_printk(TPACPI_DBG_MIXER,
6624 "ALSA: trying to set volume level to %hu\n", vol);
6625 return __volume_set_volume_ec(vol);
6626 }
6627
6628 static void volume_alsa_notify_change(void)
6629 {
6630 struct tpacpi_alsa_data *d;
6631
6632 if (alsa_card && alsa_card->private_data) {
6633 d = alsa_card->private_data;
6634 if (d->ctl_mute_id)
6635 snd_ctl_notify(alsa_card,
6636 SNDRV_CTL_EVENT_MASK_VALUE,
6637 d->ctl_mute_id);
6638 if (d->ctl_vol_id)
6639 snd_ctl_notify(alsa_card,
6640 SNDRV_CTL_EVENT_MASK_VALUE,
6641 d->ctl_vol_id);
6642 }
6643 }
6644
6645 static int volume_alsa_vol_info(struct snd_kcontrol *kcontrol,
6646 struct snd_ctl_elem_info *uinfo)
6647 {
6648 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
6649 uinfo->count = 1;
6650 uinfo->value.integer.min = 0;
6651 uinfo->value.integer.max = TP_EC_VOLUME_MAX;
6652 return 0;
6653 }
6654
6655 static int volume_alsa_vol_get(struct snd_kcontrol *kcontrol,
6656 struct snd_ctl_elem_value *ucontrol)
6657 {
6658 u8 s;
6659 int rc;
6660
6661 rc = volume_get_status(&s);
6662 if (rc < 0)
6663 return rc;
6664
6665 ucontrol->value.integer.value[0] = s & TP_EC_AUDIO_LVL_MSK;
6666 return 0;
6667 }
6668
6669 static int volume_alsa_vol_put(struct snd_kcontrol *kcontrol,
6670 struct snd_ctl_elem_value *ucontrol)
6671 {
6672 return volume_alsa_set_volume(ucontrol->value.integer.value[0]);
6673 }
6674
6675 #define volume_alsa_mute_info snd_ctl_boolean_mono_info
6676
6677 static int volume_alsa_mute_get(struct snd_kcontrol *kcontrol,
6678 struct snd_ctl_elem_value *ucontrol)
6679 {
6680 u8 s;
6681 int rc;
6682
6683 rc = volume_get_status(&s);
6684 if (rc < 0)
6685 return rc;
6686
6687 ucontrol->value.integer.value[0] =
6688 (s & TP_EC_AUDIO_MUTESW_MSK) ? 0 : 1;
6689 return 0;
6690 }
6691
6692 static int volume_alsa_mute_put(struct snd_kcontrol *kcontrol,
6693 struct snd_ctl_elem_value *ucontrol)
6694 {
6695 return volume_alsa_set_mute(!ucontrol->value.integer.value[0]);
6696 }
6697
6698 static struct snd_kcontrol_new volume_alsa_control_vol __devinitdata = {
6699 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
6700 .name = "Console Playback Volume",
6701 .index = 0,
6702 .access = SNDRV_CTL_ELEM_ACCESS_READ,
6703 .info = volume_alsa_vol_info,
6704 .get = volume_alsa_vol_get,
6705 };
6706
6707 static struct snd_kcontrol_new volume_alsa_control_mute __devinitdata = {
6708 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
6709 .name = "Console Playback Switch",
6710 .index = 0,
6711 .access = SNDRV_CTL_ELEM_ACCESS_READ,
6712 .info = volume_alsa_mute_info,
6713 .get = volume_alsa_mute_get,
6714 };
6715
6716 static void volume_suspend(pm_message_t state)
6717 {
6718 tpacpi_volume_checkpoint_nvram();
6719 }
6720
6721 static void volume_resume(void)
6722 {
6723 volume_alsa_notify_change();
6724 }
6725
6726 static void volume_shutdown(void)
6727 {
6728 tpacpi_volume_checkpoint_nvram();
6729 }
6730
6731 static void volume_exit(void)
6732 {
6733 if (alsa_card) {
6734 snd_card_free(alsa_card);
6735 alsa_card = NULL;
6736 }
6737
6738 tpacpi_volume_checkpoint_nvram();
6739 }
6740
6741 static int __init volume_create_alsa_mixer(void)
6742 {
6743 struct snd_card *card;
6744 struct tpacpi_alsa_data *data;
6745 struct snd_kcontrol *ctl_vol;
6746 struct snd_kcontrol *ctl_mute;
6747 int rc;
6748
6749 rc = snd_card_create(alsa_index, alsa_id, THIS_MODULE,
6750 sizeof(struct tpacpi_alsa_data), &card);
6751 if (rc < 0 || !card) {
6752 printk(TPACPI_ERR
6753 "Failed to create ALSA card structures: %d\n", rc);
6754 return 1;
6755 }
6756
6757 BUG_ON(!card->private_data);
6758 data = card->private_data;
6759 data->card = card;
6760
6761 strlcpy(card->driver, TPACPI_ALSA_DRVNAME,
6762 sizeof(card->driver));
6763 strlcpy(card->shortname, TPACPI_ALSA_SHRTNAME,
6764 sizeof(card->shortname));
6765 snprintf(card->mixername, sizeof(card->mixername), "ThinkPad EC %s",
6766 (thinkpad_id.ec_version_str) ?
6767 thinkpad_id.ec_version_str : "(unknown)");
6768 snprintf(card->longname, sizeof(card->longname),
6769 "%s at EC reg 0x%02x, fw %s", card->shortname, TP_EC_AUDIO,
6770 (thinkpad_id.ec_version_str) ?
6771 thinkpad_id.ec_version_str : "unknown");
6772
6773 if (volume_control_allowed) {
6774 volume_alsa_control_vol.put = volume_alsa_vol_put;
6775 volume_alsa_control_vol.access =
6776 SNDRV_CTL_ELEM_ACCESS_READWRITE;
6777
6778 volume_alsa_control_mute.put = volume_alsa_mute_put;
6779 volume_alsa_control_mute.access =
6780 SNDRV_CTL_ELEM_ACCESS_READWRITE;
6781 }
6782
6783 if (!tp_features.mixer_no_level_control) {
6784 ctl_vol = snd_ctl_new1(&volume_alsa_control_vol, NULL);
6785 rc = snd_ctl_add(card, ctl_vol);
6786 if (rc < 0) {
6787 printk(TPACPI_ERR
6788 "Failed to create ALSA volume control: %d\n",
6789 rc);
6790 goto err_exit;
6791 }
6792 data->ctl_vol_id = &ctl_vol->id;
6793 }
6794
6795 ctl_mute = snd_ctl_new1(&volume_alsa_control_mute, NULL);
6796 rc = snd_ctl_add(card, ctl_mute);
6797 if (rc < 0) {
6798 printk(TPACPI_ERR "Failed to create ALSA mute control: %d\n",
6799 rc);
6800 goto err_exit;
6801 }
6802 data->ctl_mute_id = &ctl_mute->id;
6803
6804 snd_card_set_dev(card, &tpacpi_pdev->dev);
6805 rc = snd_card_register(card);
6806 if (rc < 0) {
6807 printk(TPACPI_ERR "Failed to register ALSA card: %d\n", rc);
6808 goto err_exit;
6809 }
6810
6811 alsa_card = card;
6812 return 0;
6813
6814 err_exit:
6815 snd_card_free(card);
6816 return 1;
6817 }
6818
6819 #define TPACPI_VOL_Q_MUTEONLY 0x0001 /* Mute-only control available */
6820 #define TPACPI_VOL_Q_LEVEL 0x0002 /* Volume control available */
6821
6822 static const struct tpacpi_quirk volume_quirk_table[] __initconst = {
6823 /* Whitelist volume level on all IBM by default */
6824 { .vendor = PCI_VENDOR_ID_IBM,
6825 .bios = TPACPI_MATCH_ANY,
6826 .ec = TPACPI_MATCH_ANY,
6827 .quirks = TPACPI_VOL_Q_LEVEL },
6828
6829 /* Lenovo models with volume control (needs confirmation) */
6830 TPACPI_QEC_LNV('7', 'C', TPACPI_VOL_Q_LEVEL), /* R60/i */
6831 TPACPI_QEC_LNV('7', 'E', TPACPI_VOL_Q_LEVEL), /* R60e/i */
6832 TPACPI_QEC_LNV('7', '9', TPACPI_VOL_Q_LEVEL), /* T60/p */
6833 TPACPI_QEC_LNV('7', 'B', TPACPI_VOL_Q_LEVEL), /* X60/s */
6834 TPACPI_QEC_LNV('7', 'J', TPACPI_VOL_Q_LEVEL), /* X60t */
6835 TPACPI_QEC_LNV('7', '7', TPACPI_VOL_Q_LEVEL), /* Z60 */
6836 TPACPI_QEC_LNV('7', 'F', TPACPI_VOL_Q_LEVEL), /* Z61 */
6837
6838 /* Whitelist mute-only on all Lenovo by default */
6839 { .vendor = PCI_VENDOR_ID_LENOVO,
6840 .bios = TPACPI_MATCH_ANY,
6841 .ec = TPACPI_MATCH_ANY,
6842 .quirks = TPACPI_VOL_Q_MUTEONLY }
6843 };
6844
6845 static int __init volume_init(struct ibm_init_struct *iibm)
6846 {
6847 unsigned long quirks;
6848 int rc;
6849
6850 vdbg_printk(TPACPI_DBG_INIT, "initializing volume subdriver\n");
6851
6852 mutex_init(&volume_mutex);
6853
6854 /*
6855 * Check for module parameter bogosity, note that we
6856 * init volume_mode to TPACPI_VOL_MODE_MAX in order to be
6857 * able to detect "unspecified"
6858 */
6859 if (volume_mode > TPACPI_VOL_MODE_MAX)
6860 return -EINVAL;
6861
6862 if (volume_mode == TPACPI_VOL_MODE_UCMS_STEP) {
6863 printk(TPACPI_ERR
6864 "UCMS step volume mode not implemented, "
6865 "please contact %s\n", TPACPI_MAIL);
6866 return 1;
6867 }
6868
6869 if (volume_capabilities >= TPACPI_VOL_CAP_MAX)
6870 return -EINVAL;
6871
6872 /*
6873 * The ALSA mixer is our primary interface.
6874 * When disabled, don't install the subdriver at all
6875 */
6876 if (!alsa_enable) {
6877 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
6878 "ALSA mixer disabled by parameter, "
6879 "not loading volume subdriver...\n");
6880 return 1;
6881 }
6882
6883 quirks = tpacpi_check_quirks(volume_quirk_table,
6884 ARRAY_SIZE(volume_quirk_table));
6885
6886 switch (volume_capabilities) {
6887 case TPACPI_VOL_CAP_AUTO:
6888 if (quirks & TPACPI_VOL_Q_MUTEONLY)
6889 tp_features.mixer_no_level_control = 1;
6890 else if (quirks & TPACPI_VOL_Q_LEVEL)
6891 tp_features.mixer_no_level_control = 0;
6892 else
6893 return 1; /* no mixer */
6894 break;
6895 case TPACPI_VOL_CAP_VOLMUTE:
6896 tp_features.mixer_no_level_control = 0;
6897 break;
6898 case TPACPI_VOL_CAP_MUTEONLY:
6899 tp_features.mixer_no_level_control = 1;
6900 break;
6901 default:
6902 return 1;
6903 }
6904
6905 if (volume_capabilities != TPACPI_VOL_CAP_AUTO)
6906 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
6907 "using user-supplied volume_capabilities=%d\n",
6908 volume_capabilities);
6909
6910 if (volume_mode == TPACPI_VOL_MODE_AUTO ||
6911 volume_mode == TPACPI_VOL_MODE_MAX) {
6912 volume_mode = TPACPI_VOL_MODE_ECNVRAM;
6913
6914 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
6915 "driver auto-selected volume_mode=%d\n",
6916 volume_mode);
6917 } else {
6918 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
6919 "using user-supplied volume_mode=%d\n",
6920 volume_mode);
6921 }
6922
6923 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
6924 "mute is supported, volume control is %s\n",
6925 str_supported(!tp_features.mixer_no_level_control));
6926
6927 rc = volume_create_alsa_mixer();
6928 if (rc) {
6929 printk(TPACPI_ERR
6930 "Could not create the ALSA mixer interface\n");
6931 return rc;
6932 }
6933
6934 printk(TPACPI_INFO
6935 "Console audio control enabled, mode: %s\n",
6936 (volume_control_allowed) ?
6937 "override (read/write)" :
6938 "monitor (read only)");
6939
6940 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
6941 "registering volume hotkeys as change notification\n");
6942 tpacpi_hotkey_driver_mask_set(hotkey_driver_mask
6943 | TP_ACPI_HKEY_VOLUP_MASK
6944 | TP_ACPI_HKEY_VOLDWN_MASK
6945 | TP_ACPI_HKEY_MUTE_MASK);
6946
6947 return 0;
6948 }
6949
6950 static int volume_read(struct seq_file *m)
6951 {
6952 u8 status;
6953
6954 if (volume_get_status(&status) < 0) {
6955 seq_printf(m, "level:\t\tunreadable\n");
6956 } else {
6957 if (tp_features.mixer_no_level_control)
6958 seq_printf(m, "level:\t\tunsupported\n");
6959 else
6960 seq_printf(m, "level:\t\t%d\n",
6961 status & TP_EC_AUDIO_LVL_MSK);
6962
6963 seq_printf(m, "mute:\t\t%s\n",
6964 onoff(status, TP_EC_AUDIO_MUTESW));
6965
6966 if (volume_control_allowed) {
6967 seq_printf(m, "commands:\tunmute, mute\n");
6968 if (!tp_features.mixer_no_level_control) {
6969 seq_printf(m,
6970 "commands:\tup, down\n");
6971 seq_printf(m,
6972 "commands:\tlevel <level>"
6973 " (<level> is 0-%d)\n",
6974 TP_EC_VOLUME_MAX);
6975 }
6976 }
6977 }
6978
6979 return 0;
6980 }
6981
6982 static int volume_write(char *buf)
6983 {
6984 u8 s;
6985 u8 new_level, new_mute;
6986 int l;
6987 char *cmd;
6988 int rc;
6989
6990 /*
6991 * We do allow volume control at driver startup, so that the
6992 * user can set initial state through the volume=... parameter hack.
6993 */
6994 if (!volume_control_allowed && tpacpi_lifecycle != TPACPI_LIFE_INIT) {
6995 if (unlikely(!tp_warned.volume_ctrl_forbidden)) {
6996 tp_warned.volume_ctrl_forbidden = 1;
6997 printk(TPACPI_NOTICE
6998 "Console audio control in monitor mode, "
6999 "changes are not allowed.\n");
7000 printk(TPACPI_NOTICE
7001 "Use the volume_control=1 module parameter "
7002 "to enable volume control\n");
7003 }
7004 return -EPERM;
7005 }
7006
7007 rc = volume_get_status(&s);
7008 if (rc < 0)
7009 return rc;
7010
7011 new_level = s & TP_EC_AUDIO_LVL_MSK;
7012 new_mute = s & TP_EC_AUDIO_MUTESW_MSK;
7013
7014 while ((cmd = next_cmd(&buf))) {
7015 if (!tp_features.mixer_no_level_control) {
7016 if (strlencmp(cmd, "up") == 0) {
7017 if (new_mute)
7018 new_mute = 0;
7019 else if (new_level < TP_EC_VOLUME_MAX)
7020 new_level++;
7021 continue;
7022 } else if (strlencmp(cmd, "down") == 0) {
7023 if (new_mute)
7024 new_mute = 0;
7025 else if (new_level > 0)
7026 new_level--;
7027 continue;
7028 } else if (sscanf(cmd, "level %u", &l) == 1 &&
7029 l >= 0 && l <= TP_EC_VOLUME_MAX) {
7030 new_level = l;
7031 continue;
7032 }
7033 }
7034 if (strlencmp(cmd, "mute") == 0)
7035 new_mute = TP_EC_AUDIO_MUTESW_MSK;
7036 else if (strlencmp(cmd, "unmute") == 0)
7037 new_mute = 0;
7038 else
7039 return -EINVAL;
7040 }
7041
7042 if (tp_features.mixer_no_level_control) {
7043 tpacpi_disclose_usertask("procfs volume", "%smute\n",
7044 new_mute ? "" : "un");
7045 rc = volume_set_mute(!!new_mute);
7046 } else {
7047 tpacpi_disclose_usertask("procfs volume",
7048 "%smute and set level to %d\n",
7049 new_mute ? "" : "un", new_level);
7050 rc = volume_set_status(new_mute | new_level);
7051 }
7052 volume_alsa_notify_change();
7053
7054 return (rc == -EINTR) ? -ERESTARTSYS : rc;
7055 }
7056
7057 static struct ibm_struct volume_driver_data = {
7058 .name = "volume",
7059 .read = volume_read,
7060 .write = volume_write,
7061 .exit = volume_exit,
7062 .suspend = volume_suspend,
7063 .resume = volume_resume,
7064 .shutdown = volume_shutdown,
7065 };
7066
7067 #else /* !CONFIG_THINKPAD_ACPI_ALSA_SUPPORT */
7068
7069 #define alsa_card NULL
7070
7071 static void inline volume_alsa_notify_change(void)
7072 {
7073 }
7074
7075 static int __init volume_init(struct ibm_init_struct *iibm)
7076 {
7077 printk(TPACPI_INFO
7078 "volume: disabled as there is no ALSA support in this kernel\n");
7079
7080 return 1;
7081 }
7082
7083 static struct ibm_struct volume_driver_data = {
7084 .name = "volume",
7085 };
7086
7087 #endif /* CONFIG_THINKPAD_ACPI_ALSA_SUPPORT */
7088
7089 /*************************************************************************
7090 * Fan subdriver
7091 */
7092
7093 /*
7094 * FAN ACCESS MODES
7095 *
7096 * TPACPI_FAN_RD_ACPI_GFAN:
7097 * ACPI GFAN method: returns fan level
7098 *
7099 * see TPACPI_FAN_WR_ACPI_SFAN
7100 * EC 0x2f (HFSP) not available if GFAN exists
7101 *
7102 * TPACPI_FAN_WR_ACPI_SFAN:
7103 * ACPI SFAN method: sets fan level, 0 (stop) to 7 (max)
7104 *
7105 * EC 0x2f (HFSP) might be available *for reading*, but do not use
7106 * it for writing.
7107 *
7108 * TPACPI_FAN_WR_TPEC:
7109 * ThinkPad EC register 0x2f (HFSP): fan control loop mode
7110 * Supported on almost all ThinkPads
7111 *
7112 * Fan speed changes of any sort (including those caused by the
7113 * disengaged mode) are usually done slowly by the firmware as the
7114 * maximum amount of fan duty cycle change per second seems to be
7115 * limited.
7116 *
7117 * Reading is not available if GFAN exists.
7118 * Writing is not available if SFAN exists.
7119 *
7120 * Bits
7121 * 7 automatic mode engaged;
7122 * (default operation mode of the ThinkPad)
7123 * fan level is ignored in this mode.
7124 * 6 full speed mode (takes precedence over bit 7);
7125 * not available on all thinkpads. May disable
7126 * the tachometer while the fan controller ramps up
7127 * the speed (which can take up to a few *minutes*).
7128 * Speeds up fan to 100% duty-cycle, which is far above
7129 * the standard RPM levels. It is not impossible that
7130 * it could cause hardware damage.
7131 * 5-3 unused in some models. Extra bits for fan level
7132 * in others, but still useless as all values above
7133 * 7 map to the same speed as level 7 in these models.
7134 * 2-0 fan level (0..7 usually)
7135 * 0x00 = stop
7136 * 0x07 = max (set when temperatures critical)
7137 * Some ThinkPads may have other levels, see
7138 * TPACPI_FAN_WR_ACPI_FANS (X31/X40/X41)
7139 *
7140 * FIRMWARE BUG: on some models, EC 0x2f might not be initialized at
7141 * boot. Apparently the EC does not intialize it, so unless ACPI DSDT
7142 * does so, its initial value is meaningless (0x07).
7143 *
7144 * For firmware bugs, refer to:
7145 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
7146 *
7147 * ----
7148 *
7149 * ThinkPad EC register 0x84 (LSB), 0x85 (MSB):
7150 * Main fan tachometer reading (in RPM)
7151 *
7152 * This register is present on all ThinkPads with a new-style EC, and
7153 * it is known not to be present on the A21m/e, and T22, as there is
7154 * something else in offset 0x84 according to the ACPI DSDT. Other
7155 * ThinkPads from this same time period (and earlier) probably lack the
7156 * tachometer as well.
7157 *
7158 * Unfortunately a lot of ThinkPads with new-style ECs but whose firmware
7159 * was never fixed by IBM to report the EC firmware version string
7160 * probably support the tachometer (like the early X models), so
7161 * detecting it is quite hard. We need more data to know for sure.
7162 *
7163 * FIRMWARE BUG: always read 0x84 first, otherwise incorrect readings
7164 * might result.
7165 *
7166 * FIRMWARE BUG: may go stale while the EC is switching to full speed
7167 * mode.
7168 *
7169 * For firmware bugs, refer to:
7170 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
7171 *
7172 * ----
7173 *
7174 * ThinkPad EC register 0x31 bit 0 (only on select models)
7175 *
7176 * When bit 0 of EC register 0x31 is zero, the tachometer registers
7177 * show the speed of the main fan. When bit 0 of EC register 0x31
7178 * is one, the tachometer registers show the speed of the auxiliary
7179 * fan.
7180 *
7181 * Fan control seems to affect both fans, regardless of the state
7182 * of this bit.
7183 *
7184 * So far, only the firmware for the X60/X61 non-tablet versions
7185 * seem to support this (firmware TP-7M).
7186 *
7187 * TPACPI_FAN_WR_ACPI_FANS:
7188 * ThinkPad X31, X40, X41. Not available in the X60.
7189 *
7190 * FANS ACPI handle: takes three arguments: low speed, medium speed,
7191 * high speed. ACPI DSDT seems to map these three speeds to levels
7192 * as follows: STOP LOW LOW MED MED HIGH HIGH HIGH HIGH
7193 * (this map is stored on FAN0..FAN8 as "0,1,1,2,2,3,3,3,3")
7194 *
7195 * The speeds are stored on handles
7196 * (FANA:FAN9), (FANC:FANB), (FANE:FAND).
7197 *
7198 * There are three default speed sets, accessible as handles:
7199 * FS1L,FS1M,FS1H; FS2L,FS2M,FS2H; FS3L,FS3M,FS3H
7200 *
7201 * ACPI DSDT switches which set is in use depending on various
7202 * factors.
7203 *
7204 * TPACPI_FAN_WR_TPEC is also available and should be used to
7205 * command the fan. The X31/X40/X41 seems to have 8 fan levels,
7206 * but the ACPI tables just mention level 7.
7207 */
7208
7209 enum { /* Fan control constants */
7210 fan_status_offset = 0x2f, /* EC register 0x2f */
7211 fan_rpm_offset = 0x84, /* EC register 0x84: LSB, 0x85 MSB (RPM)
7212 * 0x84 must be read before 0x85 */
7213 fan_select_offset = 0x31, /* EC register 0x31 (Firmware 7M)
7214 bit 0 selects which fan is active */
7215
7216 TP_EC_FAN_FULLSPEED = 0x40, /* EC fan mode: full speed */
7217 TP_EC_FAN_AUTO = 0x80, /* EC fan mode: auto fan control */
7218
7219 TPACPI_FAN_LAST_LEVEL = 0x100, /* Use cached last-seen fan level */
7220 };
7221
7222 enum fan_status_access_mode {
7223 TPACPI_FAN_NONE = 0, /* No fan status or control */
7224 TPACPI_FAN_RD_ACPI_GFAN, /* Use ACPI GFAN */
7225 TPACPI_FAN_RD_TPEC, /* Use ACPI EC regs 0x2f, 0x84-0x85 */
7226 };
7227
7228 enum fan_control_access_mode {
7229 TPACPI_FAN_WR_NONE = 0, /* No fan control */
7230 TPACPI_FAN_WR_ACPI_SFAN, /* Use ACPI SFAN */
7231 TPACPI_FAN_WR_TPEC, /* Use ACPI EC reg 0x2f */
7232 TPACPI_FAN_WR_ACPI_FANS, /* Use ACPI FANS and EC reg 0x2f */
7233 };
7234
7235 enum fan_control_commands {
7236 TPACPI_FAN_CMD_SPEED = 0x0001, /* speed command */
7237 TPACPI_FAN_CMD_LEVEL = 0x0002, /* level command */
7238 TPACPI_FAN_CMD_ENABLE = 0x0004, /* enable/disable cmd,
7239 * and also watchdog cmd */
7240 };
7241
7242 static int fan_control_allowed;
7243
7244 static enum fan_status_access_mode fan_status_access_mode;
7245 static enum fan_control_access_mode fan_control_access_mode;
7246 static enum fan_control_commands fan_control_commands;
7247
7248 static u8 fan_control_initial_status;
7249 static u8 fan_control_desired_level;
7250 static u8 fan_control_resume_level;
7251 static int fan_watchdog_maxinterval;
7252
7253 static struct mutex fan_mutex;
7254
7255 static void fan_watchdog_fire(struct work_struct *ignored);
7256 static DECLARE_DELAYED_WORK(fan_watchdog_task, fan_watchdog_fire);
7257
7258 TPACPI_HANDLE(fans, ec, "FANS"); /* X31, X40, X41 */
7259 TPACPI_HANDLE(gfan, ec, "GFAN", /* 570 */
7260 "\\FSPD", /* 600e/x, 770e, 770x */
7261 ); /* all others */
7262 TPACPI_HANDLE(sfan, ec, "SFAN", /* 570 */
7263 "JFNS", /* 770x-JL */
7264 ); /* all others */
7265
7266 /*
7267 * Unitialized HFSP quirk: ACPI DSDT and EC fail to initialize the
7268 * HFSP register at boot, so it contains 0x07 but the Thinkpad could
7269 * be in auto mode (0x80).
7270 *
7271 * This is corrected by any write to HFSP either by the driver, or
7272 * by the firmware.
7273 *
7274 * We assume 0x07 really means auto mode while this quirk is active,
7275 * as this is far more likely than the ThinkPad being in level 7,
7276 * which is only used by the firmware during thermal emergencies.
7277 *
7278 * Enable for TP-1Y (T43), TP-78 (R51e), TP-76 (R52),
7279 * TP-70 (T43, R52), which are known to be buggy.
7280 */
7281
7282 static void fan_quirk1_setup(void)
7283 {
7284 if (fan_control_initial_status == 0x07) {
7285 printk(TPACPI_NOTICE
7286 "fan_init: initial fan status is unknown, "
7287 "assuming it is in auto mode\n");
7288 tp_features.fan_ctrl_status_undef = 1;
7289 }
7290 }
7291
7292 static void fan_quirk1_handle(u8 *fan_status)
7293 {
7294 if (unlikely(tp_features.fan_ctrl_status_undef)) {
7295 if (*fan_status != fan_control_initial_status) {
7296 /* something changed the HFSP regisnter since
7297 * driver init time, so it is not undefined
7298 * anymore */
7299 tp_features.fan_ctrl_status_undef = 0;
7300 } else {
7301 /* Return most likely status. In fact, it
7302 * might be the only possible status */
7303 *fan_status = TP_EC_FAN_AUTO;
7304 }
7305 }
7306 }
7307
7308 /* Select main fan on X60/X61, NOOP on others */
7309 static bool fan_select_fan1(void)
7310 {
7311 if (tp_features.second_fan) {
7312 u8 val;
7313
7314 if (ec_read(fan_select_offset, &val) < 0)
7315 return false;
7316 val &= 0xFEU;
7317 if (ec_write(fan_select_offset, val) < 0)
7318 return false;
7319 }
7320 return true;
7321 }
7322
7323 /* Select secondary fan on X60/X61 */
7324 static bool fan_select_fan2(void)
7325 {
7326 u8 val;
7327
7328 if (!tp_features.second_fan)
7329 return false;
7330
7331 if (ec_read(fan_select_offset, &val) < 0)
7332 return false;
7333 val |= 0x01U;
7334 if (ec_write(fan_select_offset, val) < 0)
7335 return false;
7336
7337 return true;
7338 }
7339
7340 /*
7341 * Call with fan_mutex held
7342 */
7343 static void fan_update_desired_level(u8 status)
7344 {
7345 if ((status &
7346 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
7347 if (status > 7)
7348 fan_control_desired_level = 7;
7349 else
7350 fan_control_desired_level = status;
7351 }
7352 }
7353
7354 static int fan_get_status(u8 *status)
7355 {
7356 u8 s;
7357
7358 /* TODO:
7359 * Add TPACPI_FAN_RD_ACPI_FANS ? */
7360
7361 switch (fan_status_access_mode) {
7362 case TPACPI_FAN_RD_ACPI_GFAN:
7363 /* 570, 600e/x, 770e, 770x */
7364
7365 if (unlikely(!acpi_evalf(gfan_handle, &s, NULL, "d")))
7366 return -EIO;
7367
7368 if (likely(status))
7369 *status = s & 0x07;
7370
7371 break;
7372
7373 case TPACPI_FAN_RD_TPEC:
7374 /* all except 570, 600e/x, 770e, 770x */
7375 if (unlikely(!acpi_ec_read(fan_status_offset, &s)))
7376 return -EIO;
7377
7378 if (likely(status)) {
7379 *status = s;
7380 fan_quirk1_handle(status);
7381 }
7382
7383 break;
7384
7385 default:
7386 return -ENXIO;
7387 }
7388
7389 return 0;
7390 }
7391
7392 static int fan_get_status_safe(u8 *status)
7393 {
7394 int rc;
7395 u8 s;
7396
7397 if (mutex_lock_killable(&fan_mutex))
7398 return -ERESTARTSYS;
7399 rc = fan_get_status(&s);
7400 if (!rc)
7401 fan_update_desired_level(s);
7402 mutex_unlock(&fan_mutex);
7403
7404 if (status)
7405 *status = s;
7406
7407 return rc;
7408 }
7409
7410 static int fan_get_speed(unsigned int *speed)
7411 {
7412 u8 hi, lo;
7413
7414 switch (fan_status_access_mode) {
7415 case TPACPI_FAN_RD_TPEC:
7416 /* all except 570, 600e/x, 770e, 770x */
7417 if (unlikely(!fan_select_fan1()))
7418 return -EIO;
7419 if (unlikely(!acpi_ec_read(fan_rpm_offset, &lo) ||
7420 !acpi_ec_read(fan_rpm_offset + 1, &hi)))
7421 return -EIO;
7422
7423 if (likely(speed))
7424 *speed = (hi << 8) | lo;
7425
7426 break;
7427
7428 default:
7429 return -ENXIO;
7430 }
7431
7432 return 0;
7433 }
7434
7435 static int fan2_get_speed(unsigned int *speed)
7436 {
7437 u8 hi, lo;
7438 bool rc;
7439
7440 switch (fan_status_access_mode) {
7441 case TPACPI_FAN_RD_TPEC:
7442 /* all except 570, 600e/x, 770e, 770x */
7443 if (unlikely(!fan_select_fan2()))
7444 return -EIO;
7445 rc = !acpi_ec_read(fan_rpm_offset, &lo) ||
7446 !acpi_ec_read(fan_rpm_offset + 1, &hi);
7447 fan_select_fan1(); /* play it safe */
7448 if (rc)
7449 return -EIO;
7450
7451 if (likely(speed))
7452 *speed = (hi << 8) | lo;
7453
7454 break;
7455
7456 default:
7457 return -ENXIO;
7458 }
7459
7460 return 0;
7461 }
7462
7463 static int fan_set_level(int level)
7464 {
7465 if (!fan_control_allowed)
7466 return -EPERM;
7467
7468 switch (fan_control_access_mode) {
7469 case TPACPI_FAN_WR_ACPI_SFAN:
7470 if (level >= 0 && level <= 7) {
7471 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", level))
7472 return -EIO;
7473 } else
7474 return -EINVAL;
7475 break;
7476
7477 case TPACPI_FAN_WR_ACPI_FANS:
7478 case TPACPI_FAN_WR_TPEC:
7479 if (!(level & TP_EC_FAN_AUTO) &&
7480 !(level & TP_EC_FAN_FULLSPEED) &&
7481 ((level < 0) || (level > 7)))
7482 return -EINVAL;
7483
7484 /* safety net should the EC not support AUTO
7485 * or FULLSPEED mode bits and just ignore them */
7486 if (level & TP_EC_FAN_FULLSPEED)
7487 level |= 7; /* safety min speed 7 */
7488 else if (level & TP_EC_FAN_AUTO)
7489 level |= 4; /* safety min speed 4 */
7490
7491 if (!acpi_ec_write(fan_status_offset, level))
7492 return -EIO;
7493 else
7494 tp_features.fan_ctrl_status_undef = 0;
7495 break;
7496
7497 default:
7498 return -ENXIO;
7499 }
7500
7501 vdbg_printk(TPACPI_DBG_FAN,
7502 "fan control: set fan control register to 0x%02x\n", level);
7503 return 0;
7504 }
7505
7506 static int fan_set_level_safe(int level)
7507 {
7508 int rc;
7509
7510 if (!fan_control_allowed)
7511 return -EPERM;
7512
7513 if (mutex_lock_killable(&fan_mutex))
7514 return -ERESTARTSYS;
7515
7516 if (level == TPACPI_FAN_LAST_LEVEL)
7517 level = fan_control_desired_level;
7518
7519 rc = fan_set_level(level);
7520 if (!rc)
7521 fan_update_desired_level(level);
7522
7523 mutex_unlock(&fan_mutex);
7524 return rc;
7525 }
7526
7527 static int fan_set_enable(void)
7528 {
7529 u8 s;
7530 int rc;
7531
7532 if (!fan_control_allowed)
7533 return -EPERM;
7534
7535 if (mutex_lock_killable(&fan_mutex))
7536 return -ERESTARTSYS;
7537
7538 switch (fan_control_access_mode) {
7539 case TPACPI_FAN_WR_ACPI_FANS:
7540 case TPACPI_FAN_WR_TPEC:
7541 rc = fan_get_status(&s);
7542 if (rc < 0)
7543 break;
7544
7545 /* Don't go out of emergency fan mode */
7546 if (s != 7) {
7547 s &= 0x07;
7548 s |= TP_EC_FAN_AUTO | 4; /* min fan speed 4 */
7549 }
7550
7551 if (!acpi_ec_write(fan_status_offset, s))
7552 rc = -EIO;
7553 else {
7554 tp_features.fan_ctrl_status_undef = 0;
7555 rc = 0;
7556 }
7557 break;
7558
7559 case TPACPI_FAN_WR_ACPI_SFAN:
7560 rc = fan_get_status(&s);
7561 if (rc < 0)
7562 break;
7563
7564 s &= 0x07;
7565
7566 /* Set fan to at least level 4 */
7567 s |= 4;
7568
7569 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", s))
7570 rc = -EIO;
7571 else
7572 rc = 0;
7573 break;
7574
7575 default:
7576 rc = -ENXIO;
7577 }
7578
7579 mutex_unlock(&fan_mutex);
7580
7581 if (!rc)
7582 vdbg_printk(TPACPI_DBG_FAN,
7583 "fan control: set fan control register to 0x%02x\n",
7584 s);
7585 return rc;
7586 }
7587
7588 static int fan_set_disable(void)
7589 {
7590 int rc;
7591
7592 if (!fan_control_allowed)
7593 return -EPERM;
7594
7595 if (mutex_lock_killable(&fan_mutex))
7596 return -ERESTARTSYS;
7597
7598 rc = 0;
7599 switch (fan_control_access_mode) {
7600 case TPACPI_FAN_WR_ACPI_FANS:
7601 case TPACPI_FAN_WR_TPEC:
7602 if (!acpi_ec_write(fan_status_offset, 0x00))
7603 rc = -EIO;
7604 else {
7605 fan_control_desired_level = 0;
7606 tp_features.fan_ctrl_status_undef = 0;
7607 }
7608 break;
7609
7610 case TPACPI_FAN_WR_ACPI_SFAN:
7611 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", 0x00))
7612 rc = -EIO;
7613 else
7614 fan_control_desired_level = 0;
7615 break;
7616
7617 default:
7618 rc = -ENXIO;
7619 }
7620
7621 if (!rc)
7622 vdbg_printk(TPACPI_DBG_FAN,
7623 "fan control: set fan control register to 0\n");
7624
7625 mutex_unlock(&fan_mutex);
7626 return rc;
7627 }
7628
7629 static int fan_set_speed(int speed)
7630 {
7631 int rc;
7632
7633 if (!fan_control_allowed)
7634 return -EPERM;
7635
7636 if (mutex_lock_killable(&fan_mutex))
7637 return -ERESTARTSYS;
7638
7639 rc = 0;
7640 switch (fan_control_access_mode) {
7641 case TPACPI_FAN_WR_ACPI_FANS:
7642 if (speed >= 0 && speed <= 65535) {
7643 if (!acpi_evalf(fans_handle, NULL, NULL, "vddd",
7644 speed, speed, speed))
7645 rc = -EIO;
7646 } else
7647 rc = -EINVAL;
7648 break;
7649
7650 default:
7651 rc = -ENXIO;
7652 }
7653
7654 mutex_unlock(&fan_mutex);
7655 return rc;
7656 }
7657
7658 static void fan_watchdog_reset(void)
7659 {
7660 static int fan_watchdog_active;
7661
7662 if (fan_control_access_mode == TPACPI_FAN_WR_NONE)
7663 return;
7664
7665 if (fan_watchdog_active)
7666 cancel_delayed_work(&fan_watchdog_task);
7667
7668 if (fan_watchdog_maxinterval > 0 &&
7669 tpacpi_lifecycle != TPACPI_LIFE_EXITING) {
7670 fan_watchdog_active = 1;
7671 if (!queue_delayed_work(tpacpi_wq, &fan_watchdog_task,
7672 msecs_to_jiffies(fan_watchdog_maxinterval
7673 * 1000))) {
7674 printk(TPACPI_ERR
7675 "failed to queue the fan watchdog, "
7676 "watchdog will not trigger\n");
7677 }
7678 } else
7679 fan_watchdog_active = 0;
7680 }
7681
7682 static void fan_watchdog_fire(struct work_struct *ignored)
7683 {
7684 int rc;
7685
7686 if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
7687 return;
7688
7689 printk(TPACPI_NOTICE "fan watchdog: enabling fan\n");
7690 rc = fan_set_enable();
7691 if (rc < 0) {
7692 printk(TPACPI_ERR "fan watchdog: error %d while enabling fan, "
7693 "will try again later...\n", -rc);
7694 /* reschedule for later */
7695 fan_watchdog_reset();
7696 }
7697 }
7698
7699 /*
7700 * SYSFS fan layout: hwmon compatible (device)
7701 *
7702 * pwm*_enable:
7703 * 0: "disengaged" mode
7704 * 1: manual mode
7705 * 2: native EC "auto" mode (recommended, hardware default)
7706 *
7707 * pwm*: set speed in manual mode, ignored otherwise.
7708 * 0 is level 0; 255 is level 7. Intermediate points done with linear
7709 * interpolation.
7710 *
7711 * fan*_input: tachometer reading, RPM
7712 *
7713 *
7714 * SYSFS fan layout: extensions
7715 *
7716 * fan_watchdog (driver):
7717 * fan watchdog interval in seconds, 0 disables (default), max 120
7718 */
7719
7720 /* sysfs fan pwm1_enable ----------------------------------------------- */
7721 static ssize_t fan_pwm1_enable_show(struct device *dev,
7722 struct device_attribute *attr,
7723 char *buf)
7724 {
7725 int res, mode;
7726 u8 status;
7727
7728 res = fan_get_status_safe(&status);
7729 if (res)
7730 return res;
7731
7732 if (status & TP_EC_FAN_FULLSPEED) {
7733 mode = 0;
7734 } else if (status & TP_EC_FAN_AUTO) {
7735 mode = 2;
7736 } else
7737 mode = 1;
7738
7739 return snprintf(buf, PAGE_SIZE, "%d\n", mode);
7740 }
7741
7742 static ssize_t fan_pwm1_enable_store(struct device *dev,
7743 struct device_attribute *attr,
7744 const char *buf, size_t count)
7745 {
7746 unsigned long t;
7747 int res, level;
7748
7749 if (parse_strtoul(buf, 2, &t))
7750 return -EINVAL;
7751
7752 tpacpi_disclose_usertask("hwmon pwm1_enable",
7753 "set fan mode to %lu\n", t);
7754
7755 switch (t) {
7756 case 0:
7757 level = TP_EC_FAN_FULLSPEED;
7758 break;
7759 case 1:
7760 level = TPACPI_FAN_LAST_LEVEL;
7761 break;
7762 case 2:
7763 level = TP_EC_FAN_AUTO;
7764 break;
7765 case 3:
7766 /* reserved for software-controlled auto mode */
7767 return -ENOSYS;
7768 default:
7769 return -EINVAL;
7770 }
7771
7772 res = fan_set_level_safe(level);
7773 if (res == -ENXIO)
7774 return -EINVAL;
7775 else if (res < 0)
7776 return res;
7777
7778 fan_watchdog_reset();
7779
7780 return count;
7781 }
7782
7783 static struct device_attribute dev_attr_fan_pwm1_enable =
7784 __ATTR(pwm1_enable, S_IWUSR | S_IRUGO,
7785 fan_pwm1_enable_show, fan_pwm1_enable_store);
7786
7787 /* sysfs fan pwm1 ------------------------------------------------------ */
7788 static ssize_t fan_pwm1_show(struct device *dev,
7789 struct device_attribute *attr,
7790 char *buf)
7791 {
7792 int res;
7793 u8 status;
7794
7795 res = fan_get_status_safe(&status);
7796 if (res)
7797 return res;
7798
7799 if ((status &
7800 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) != 0)
7801 status = fan_control_desired_level;
7802
7803 if (status > 7)
7804 status = 7;
7805
7806 return snprintf(buf, PAGE_SIZE, "%u\n", (status * 255) / 7);
7807 }
7808
7809 static ssize_t fan_pwm1_store(struct device *dev,
7810 struct device_attribute *attr,
7811 const char *buf, size_t count)
7812 {
7813 unsigned long s;
7814 int rc;
7815 u8 status, newlevel;
7816
7817 if (parse_strtoul(buf, 255, &s))
7818 return -EINVAL;
7819
7820 tpacpi_disclose_usertask("hwmon pwm1",
7821 "set fan speed to %lu\n", s);
7822
7823 /* scale down from 0-255 to 0-7 */
7824 newlevel = (s >> 5) & 0x07;
7825
7826 if (mutex_lock_killable(&fan_mutex))
7827 return -ERESTARTSYS;
7828
7829 rc = fan_get_status(&status);
7830 if (!rc && (status &
7831 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
7832 rc = fan_set_level(newlevel);
7833 if (rc == -ENXIO)
7834 rc = -EINVAL;
7835 else if (!rc) {
7836 fan_update_desired_level(newlevel);
7837 fan_watchdog_reset();
7838 }
7839 }
7840
7841 mutex_unlock(&fan_mutex);
7842 return (rc)? rc : count;
7843 }
7844
7845 static struct device_attribute dev_attr_fan_pwm1 =
7846 __ATTR(pwm1, S_IWUSR | S_IRUGO,
7847 fan_pwm1_show, fan_pwm1_store);
7848
7849 /* sysfs fan fan1_input ------------------------------------------------ */
7850 static ssize_t fan_fan1_input_show(struct device *dev,
7851 struct device_attribute *attr,
7852 char *buf)
7853 {
7854 int res;
7855 unsigned int speed;
7856
7857 res = fan_get_speed(&speed);
7858 if (res < 0)
7859 return res;
7860
7861 return snprintf(buf, PAGE_SIZE, "%u\n", speed);
7862 }
7863
7864 static struct device_attribute dev_attr_fan_fan1_input =
7865 __ATTR(fan1_input, S_IRUGO,
7866 fan_fan1_input_show, NULL);
7867
7868 /* sysfs fan fan2_input ------------------------------------------------ */
7869 static ssize_t fan_fan2_input_show(struct device *dev,
7870 struct device_attribute *attr,
7871 char *buf)
7872 {
7873 int res;
7874 unsigned int speed;
7875
7876 res = fan2_get_speed(&speed);
7877 if (res < 0)
7878 return res;
7879
7880 return snprintf(buf, PAGE_SIZE, "%u\n", speed);
7881 }
7882
7883 static struct device_attribute dev_attr_fan_fan2_input =
7884 __ATTR(fan2_input, S_IRUGO,
7885 fan_fan2_input_show, NULL);
7886
7887 /* sysfs fan fan_watchdog (hwmon driver) ------------------------------- */
7888 static ssize_t fan_fan_watchdog_show(struct device_driver *drv,
7889 char *buf)
7890 {
7891 return snprintf(buf, PAGE_SIZE, "%u\n", fan_watchdog_maxinterval);
7892 }
7893
7894 static ssize_t fan_fan_watchdog_store(struct device_driver *drv,
7895 const char *buf, size_t count)
7896 {
7897 unsigned long t;
7898
7899 if (parse_strtoul(buf, 120, &t))
7900 return -EINVAL;
7901
7902 if (!fan_control_allowed)
7903 return -EPERM;
7904
7905 fan_watchdog_maxinterval = t;
7906 fan_watchdog_reset();
7907
7908 tpacpi_disclose_usertask("fan_watchdog", "set to %lu\n", t);
7909
7910 return count;
7911 }
7912
7913 static DRIVER_ATTR(fan_watchdog, S_IWUSR | S_IRUGO,
7914 fan_fan_watchdog_show, fan_fan_watchdog_store);
7915
7916 /* --------------------------------------------------------------------- */
7917 static struct attribute *fan_attributes[] = {
7918 &dev_attr_fan_pwm1_enable.attr, &dev_attr_fan_pwm1.attr,
7919 &dev_attr_fan_fan1_input.attr,
7920 NULL, /* for fan2_input */
7921 NULL
7922 };
7923
7924 static const struct attribute_group fan_attr_group = {
7925 .attrs = fan_attributes,
7926 };
7927
7928 #define TPACPI_FAN_Q1 0x0001 /* Unitialized HFSP */
7929 #define TPACPI_FAN_2FAN 0x0002 /* EC 0x31 bit 0 selects fan2 */
7930
7931 #define TPACPI_FAN_QI(__id1, __id2, __quirks) \
7932 { .vendor = PCI_VENDOR_ID_IBM, \
7933 .bios = TPACPI_MATCH_ANY, \
7934 .ec = TPID(__id1, __id2), \
7935 .quirks = __quirks }
7936
7937 #define TPACPI_FAN_QL(__id1, __id2, __quirks) \
7938 { .vendor = PCI_VENDOR_ID_LENOVO, \
7939 .bios = TPACPI_MATCH_ANY, \
7940 .ec = TPID(__id1, __id2), \
7941 .quirks = __quirks }
7942
7943 static const struct tpacpi_quirk fan_quirk_table[] __initconst = {
7944 TPACPI_FAN_QI('1', 'Y', TPACPI_FAN_Q1),
7945 TPACPI_FAN_QI('7', '8', TPACPI_FAN_Q1),
7946 TPACPI_FAN_QI('7', '6', TPACPI_FAN_Q1),
7947 TPACPI_FAN_QI('7', '0', TPACPI_FAN_Q1),
7948 TPACPI_FAN_QL('7', 'M', TPACPI_FAN_2FAN),
7949 };
7950
7951 #undef TPACPI_FAN_QL
7952 #undef TPACPI_FAN_QI
7953
7954 static int __init fan_init(struct ibm_init_struct *iibm)
7955 {
7956 int rc;
7957 unsigned long quirks;
7958
7959 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
7960 "initializing fan subdriver\n");
7961
7962 mutex_init(&fan_mutex);
7963 fan_status_access_mode = TPACPI_FAN_NONE;
7964 fan_control_access_mode = TPACPI_FAN_WR_NONE;
7965 fan_control_commands = 0;
7966 fan_watchdog_maxinterval = 0;
7967 tp_features.fan_ctrl_status_undef = 0;
7968 tp_features.second_fan = 0;
7969 fan_control_desired_level = 7;
7970
7971 TPACPI_ACPIHANDLE_INIT(fans);
7972 TPACPI_ACPIHANDLE_INIT(gfan);
7973 TPACPI_ACPIHANDLE_INIT(sfan);
7974
7975 quirks = tpacpi_check_quirks(fan_quirk_table,
7976 ARRAY_SIZE(fan_quirk_table));
7977
7978 if (gfan_handle) {
7979 /* 570, 600e/x, 770e, 770x */
7980 fan_status_access_mode = TPACPI_FAN_RD_ACPI_GFAN;
7981 } else {
7982 /* all other ThinkPads: note that even old-style
7983 * ThinkPad ECs supports the fan control register */
7984 if (likely(acpi_ec_read(fan_status_offset,
7985 &fan_control_initial_status))) {
7986 fan_status_access_mode = TPACPI_FAN_RD_TPEC;
7987 if (quirks & TPACPI_FAN_Q1)
7988 fan_quirk1_setup();
7989 if (quirks & TPACPI_FAN_2FAN) {
7990 tp_features.second_fan = 1;
7991 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
7992 "secondary fan support enabled\n");
7993 }
7994 } else {
7995 printk(TPACPI_ERR
7996 "ThinkPad ACPI EC access misbehaving, "
7997 "fan status and control unavailable\n");
7998 return 1;
7999 }
8000 }
8001
8002 if (sfan_handle) {
8003 /* 570, 770x-JL */
8004 fan_control_access_mode = TPACPI_FAN_WR_ACPI_SFAN;
8005 fan_control_commands |=
8006 TPACPI_FAN_CMD_LEVEL | TPACPI_FAN_CMD_ENABLE;
8007 } else {
8008 if (!gfan_handle) {
8009 /* gfan without sfan means no fan control */
8010 /* all other models implement TP EC 0x2f control */
8011
8012 if (fans_handle) {
8013 /* X31, X40, X41 */
8014 fan_control_access_mode =
8015 TPACPI_FAN_WR_ACPI_FANS;
8016 fan_control_commands |=
8017 TPACPI_FAN_CMD_SPEED |
8018 TPACPI_FAN_CMD_LEVEL |
8019 TPACPI_FAN_CMD_ENABLE;
8020 } else {
8021 fan_control_access_mode = TPACPI_FAN_WR_TPEC;
8022 fan_control_commands |=
8023 TPACPI_FAN_CMD_LEVEL |
8024 TPACPI_FAN_CMD_ENABLE;
8025 }
8026 }
8027 }
8028
8029 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
8030 "fan is %s, modes %d, %d\n",
8031 str_supported(fan_status_access_mode != TPACPI_FAN_NONE ||
8032 fan_control_access_mode != TPACPI_FAN_WR_NONE),
8033 fan_status_access_mode, fan_control_access_mode);
8034
8035 /* fan control master switch */
8036 if (!fan_control_allowed) {
8037 fan_control_access_mode = TPACPI_FAN_WR_NONE;
8038 fan_control_commands = 0;
8039 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
8040 "fan control features disabled by parameter\n");
8041 }
8042
8043 /* update fan_control_desired_level */
8044 if (fan_status_access_mode != TPACPI_FAN_NONE)
8045 fan_get_status_safe(NULL);
8046
8047 if (fan_status_access_mode != TPACPI_FAN_NONE ||
8048 fan_control_access_mode != TPACPI_FAN_WR_NONE) {
8049 if (tp_features.second_fan) {
8050 /* attach second fan tachometer */
8051 fan_attributes[ARRAY_SIZE(fan_attributes)-2] =
8052 &dev_attr_fan_fan2_input.attr;
8053 }
8054 rc = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
8055 &fan_attr_group);
8056 if (rc < 0)
8057 return rc;
8058
8059 rc = driver_create_file(&tpacpi_hwmon_pdriver.driver,
8060 &driver_attr_fan_watchdog);
8061 if (rc < 0) {
8062 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
8063 &fan_attr_group);
8064 return rc;
8065 }
8066 return 0;
8067 } else
8068 return 1;
8069 }
8070
8071 static void fan_exit(void)
8072 {
8073 vdbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_FAN,
8074 "cancelling any pending fan watchdog tasks\n");
8075
8076 /* FIXME: can we really do this unconditionally? */
8077 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj, &fan_attr_group);
8078 driver_remove_file(&tpacpi_hwmon_pdriver.driver,
8079 &driver_attr_fan_watchdog);
8080
8081 cancel_delayed_work(&fan_watchdog_task);
8082 flush_workqueue(tpacpi_wq);
8083 }
8084
8085 static void fan_suspend(pm_message_t state)
8086 {
8087 int rc;
8088
8089 if (!fan_control_allowed)
8090 return;
8091
8092 /* Store fan status in cache */
8093 fan_control_resume_level = 0;
8094 rc = fan_get_status_safe(&fan_control_resume_level);
8095 if (rc < 0)
8096 printk(TPACPI_NOTICE
8097 "failed to read fan level for later "
8098 "restore during resume: %d\n", rc);
8099
8100 /* if it is undefined, don't attempt to restore it.
8101 * KEEP THIS LAST */
8102 if (tp_features.fan_ctrl_status_undef)
8103 fan_control_resume_level = 0;
8104 }
8105
8106 static void fan_resume(void)
8107 {
8108 u8 current_level = 7;
8109 bool do_set = false;
8110 int rc;
8111
8112 /* DSDT *always* updates status on resume */
8113 tp_features.fan_ctrl_status_undef = 0;
8114
8115 if (!fan_control_allowed ||
8116 !fan_control_resume_level ||
8117 (fan_get_status_safe(&current_level) < 0))
8118 return;
8119
8120 switch (fan_control_access_mode) {
8121 case TPACPI_FAN_WR_ACPI_SFAN:
8122 /* never decrease fan level */
8123 do_set = (fan_control_resume_level > current_level);
8124 break;
8125 case TPACPI_FAN_WR_ACPI_FANS:
8126 case TPACPI_FAN_WR_TPEC:
8127 /* never decrease fan level, scale is:
8128 * TP_EC_FAN_FULLSPEED > 7 >= TP_EC_FAN_AUTO
8129 *
8130 * We expect the firmware to set either 7 or AUTO, but we
8131 * handle FULLSPEED out of paranoia.
8132 *
8133 * So, we can safely only restore FULLSPEED or 7, anything
8134 * else could slow the fan. Restoring AUTO is useless, at
8135 * best that's exactly what the DSDT already set (it is the
8136 * slower it uses).
8137 *
8138 * Always keep in mind that the DSDT *will* have set the
8139 * fans to what the vendor supposes is the best level. We
8140 * muck with it only to speed the fan up.
8141 */
8142 if (fan_control_resume_level != 7 &&
8143 !(fan_control_resume_level & TP_EC_FAN_FULLSPEED))
8144 return;
8145 else
8146 do_set = !(current_level & TP_EC_FAN_FULLSPEED) &&
8147 (current_level != fan_control_resume_level);
8148 break;
8149 default:
8150 return;
8151 }
8152 if (do_set) {
8153 printk(TPACPI_NOTICE
8154 "restoring fan level to 0x%02x\n",
8155 fan_control_resume_level);
8156 rc = fan_set_level_safe(fan_control_resume_level);
8157 if (rc < 0)
8158 printk(TPACPI_NOTICE
8159 "failed to restore fan level: %d\n", rc);
8160 }
8161 }
8162
8163 static int fan_read(struct seq_file *m)
8164 {
8165 int rc;
8166 u8 status;
8167 unsigned int speed = 0;
8168
8169 switch (fan_status_access_mode) {
8170 case TPACPI_FAN_RD_ACPI_GFAN:
8171 /* 570, 600e/x, 770e, 770x */
8172 rc = fan_get_status_safe(&status);
8173 if (rc < 0)
8174 return rc;
8175
8176 seq_printf(m, "status:\t\t%s\n"
8177 "level:\t\t%d\n",
8178 (status != 0) ? "enabled" : "disabled", status);
8179 break;
8180
8181 case TPACPI_FAN_RD_TPEC:
8182 /* all except 570, 600e/x, 770e, 770x */
8183 rc = fan_get_status_safe(&status);
8184 if (rc < 0)
8185 return rc;
8186
8187 seq_printf(m, "status:\t\t%s\n",
8188 (status != 0) ? "enabled" : "disabled");
8189
8190 rc = fan_get_speed(&speed);
8191 if (rc < 0)
8192 return rc;
8193
8194 seq_printf(m, "speed:\t\t%d\n", speed);
8195
8196 if (status & TP_EC_FAN_FULLSPEED)
8197 /* Disengaged mode takes precedence */
8198 seq_printf(m, "level:\t\tdisengaged\n");
8199 else if (status & TP_EC_FAN_AUTO)
8200 seq_printf(m, "level:\t\tauto\n");
8201 else
8202 seq_printf(m, "level:\t\t%d\n", status);
8203 break;
8204
8205 case TPACPI_FAN_NONE:
8206 default:
8207 seq_printf(m, "status:\t\tnot supported\n");
8208 }
8209
8210 if (fan_control_commands & TPACPI_FAN_CMD_LEVEL) {
8211 seq_printf(m, "commands:\tlevel <level>");
8212
8213 switch (fan_control_access_mode) {
8214 case TPACPI_FAN_WR_ACPI_SFAN:
8215 seq_printf(m, " (<level> is 0-7)\n");
8216 break;
8217
8218 default:
8219 seq_printf(m, " (<level> is 0-7, "
8220 "auto, disengaged, full-speed)\n");
8221 break;
8222 }
8223 }
8224
8225 if (fan_control_commands & TPACPI_FAN_CMD_ENABLE)
8226 seq_printf(m, "commands:\tenable, disable\n"
8227 "commands:\twatchdog <timeout> (<timeout> "
8228 "is 0 (off), 1-120 (seconds))\n");
8229
8230 if (fan_control_commands & TPACPI_FAN_CMD_SPEED)
8231 seq_printf(m, "commands:\tspeed <speed>"
8232 " (<speed> is 0-65535)\n");
8233
8234 return 0;
8235 }
8236
8237 static int fan_write_cmd_level(const char *cmd, int *rc)
8238 {
8239 int level;
8240
8241 if (strlencmp(cmd, "level auto") == 0)
8242 level = TP_EC_FAN_AUTO;
8243 else if ((strlencmp(cmd, "level disengaged") == 0) |
8244 (strlencmp(cmd, "level full-speed") == 0))
8245 level = TP_EC_FAN_FULLSPEED;
8246 else if (sscanf(cmd, "level %d", &level) != 1)
8247 return 0;
8248
8249 *rc = fan_set_level_safe(level);
8250 if (*rc == -ENXIO)
8251 printk(TPACPI_ERR "level command accepted for unsupported "
8252 "access mode %d", fan_control_access_mode);
8253 else if (!*rc)
8254 tpacpi_disclose_usertask("procfs fan",
8255 "set level to %d\n", level);
8256
8257 return 1;
8258 }
8259
8260 static int fan_write_cmd_enable(const char *cmd, int *rc)
8261 {
8262 if (strlencmp(cmd, "enable") != 0)
8263 return 0;
8264
8265 *rc = fan_set_enable();
8266 if (*rc == -ENXIO)
8267 printk(TPACPI_ERR "enable command accepted for unsupported "
8268 "access mode %d", fan_control_access_mode);
8269 else if (!*rc)
8270 tpacpi_disclose_usertask("procfs fan", "enable\n");
8271
8272 return 1;
8273 }
8274
8275 static int fan_write_cmd_disable(const char *cmd, int *rc)
8276 {
8277 if (strlencmp(cmd, "disable") != 0)
8278 return 0;
8279
8280 *rc = fan_set_disable();
8281 if (*rc == -ENXIO)
8282 printk(TPACPI_ERR "disable command accepted for unsupported "
8283 "access mode %d", fan_control_access_mode);
8284 else if (!*rc)
8285 tpacpi_disclose_usertask("procfs fan", "disable\n");
8286
8287 return 1;
8288 }
8289
8290 static int fan_write_cmd_speed(const char *cmd, int *rc)
8291 {
8292 int speed;
8293
8294 /* TODO:
8295 * Support speed <low> <medium> <high> ? */
8296
8297 if (sscanf(cmd, "speed %d", &speed) != 1)
8298 return 0;
8299
8300 *rc = fan_set_speed(speed);
8301 if (*rc == -ENXIO)
8302 printk(TPACPI_ERR "speed command accepted for unsupported "
8303 "access mode %d", fan_control_access_mode);
8304 else if (!*rc)
8305 tpacpi_disclose_usertask("procfs fan",
8306 "set speed to %d\n", speed);
8307
8308 return 1;
8309 }
8310
8311 static int fan_write_cmd_watchdog(const char *cmd, int *rc)
8312 {
8313 int interval;
8314
8315 if (sscanf(cmd, "watchdog %d", &interval) != 1)
8316 return 0;
8317
8318 if (interval < 0 || interval > 120)
8319 *rc = -EINVAL;
8320 else {
8321 fan_watchdog_maxinterval = interval;
8322 tpacpi_disclose_usertask("procfs fan",
8323 "set watchdog timer to %d\n",
8324 interval);
8325 }
8326
8327 return 1;
8328 }
8329
8330 static int fan_write(char *buf)
8331 {
8332 char *cmd;
8333 int rc = 0;
8334
8335 while (!rc && (cmd = next_cmd(&buf))) {
8336 if (!((fan_control_commands & TPACPI_FAN_CMD_LEVEL) &&
8337 fan_write_cmd_level(cmd, &rc)) &&
8338 !((fan_control_commands & TPACPI_FAN_CMD_ENABLE) &&
8339 (fan_write_cmd_enable(cmd, &rc) ||
8340 fan_write_cmd_disable(cmd, &rc) ||
8341 fan_write_cmd_watchdog(cmd, &rc))) &&
8342 !((fan_control_commands & TPACPI_FAN_CMD_SPEED) &&
8343 fan_write_cmd_speed(cmd, &rc))
8344 )
8345 rc = -EINVAL;
8346 else if (!rc)
8347 fan_watchdog_reset();
8348 }
8349
8350 return rc;
8351 }
8352
8353 static struct ibm_struct fan_driver_data = {
8354 .name = "fan",
8355 .read = fan_read,
8356 .write = fan_write,
8357 .exit = fan_exit,
8358 .suspend = fan_suspend,
8359 .resume = fan_resume,
8360 };
8361
8362 /****************************************************************************
8363 ****************************************************************************
8364 *
8365 * Infrastructure
8366 *
8367 ****************************************************************************
8368 ****************************************************************************/
8369
8370 /*
8371 * HKEY event callout for other subdrivers go here
8372 * (yes, it is ugly, but it is quick, safe, and gets the job done
8373 */
8374 static void tpacpi_driver_event(const unsigned int hkey_event)
8375 {
8376 if (ibm_backlight_device) {
8377 switch (hkey_event) {
8378 case TP_HKEY_EV_BRGHT_UP:
8379 case TP_HKEY_EV_BRGHT_DOWN:
8380 tpacpi_brightness_notify_change();
8381 }
8382 }
8383 if (alsa_card) {
8384 switch (hkey_event) {
8385 case TP_HKEY_EV_VOL_UP:
8386 case TP_HKEY_EV_VOL_DOWN:
8387 case TP_HKEY_EV_VOL_MUTE:
8388 volume_alsa_notify_change();
8389 }
8390 }
8391 }
8392
8393 static void hotkey_driver_event(const unsigned int scancode)
8394 {
8395 tpacpi_driver_event(TP_HKEY_EV_HOTKEY_BASE + scancode);
8396 }
8397
8398 /* sysfs name ---------------------------------------------------------- */
8399 static ssize_t thinkpad_acpi_pdev_name_show(struct device *dev,
8400 struct device_attribute *attr,
8401 char *buf)
8402 {
8403 return snprintf(buf, PAGE_SIZE, "%s\n", TPACPI_NAME);
8404 }
8405
8406 static struct device_attribute dev_attr_thinkpad_acpi_pdev_name =
8407 __ATTR(name, S_IRUGO, thinkpad_acpi_pdev_name_show, NULL);
8408
8409 /* --------------------------------------------------------------------- */
8410
8411 /* /proc support */
8412 static struct proc_dir_entry *proc_dir;
8413
8414 /*
8415 * Module and infrastructure proble, init and exit handling
8416 */
8417
8418 static int force_load;
8419
8420 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
8421 static const char * __init str_supported(int is_supported)
8422 {
8423 static char text_unsupported[] __initdata = "not supported";
8424
8425 return (is_supported)? &text_unsupported[4] : &text_unsupported[0];
8426 }
8427 #endif /* CONFIG_THINKPAD_ACPI_DEBUG */
8428
8429 static void ibm_exit(struct ibm_struct *ibm)
8430 {
8431 dbg_printk(TPACPI_DBG_EXIT, "removing %s\n", ibm->name);
8432
8433 list_del_init(&ibm->all_drivers);
8434
8435 if (ibm->flags.acpi_notify_installed) {
8436 dbg_printk(TPACPI_DBG_EXIT,
8437 "%s: acpi_remove_notify_handler\n", ibm->name);
8438 BUG_ON(!ibm->acpi);
8439 acpi_remove_notify_handler(*ibm->acpi->handle,
8440 ibm->acpi->type,
8441 dispatch_acpi_notify);
8442 ibm->flags.acpi_notify_installed = 0;
8443 ibm->flags.acpi_notify_installed = 0;
8444 }
8445
8446 if (ibm->flags.proc_created) {
8447 dbg_printk(TPACPI_DBG_EXIT,
8448 "%s: remove_proc_entry\n", ibm->name);
8449 remove_proc_entry(ibm->name, proc_dir);
8450 ibm->flags.proc_created = 0;
8451 }
8452
8453 if (ibm->flags.acpi_driver_registered) {
8454 dbg_printk(TPACPI_DBG_EXIT,
8455 "%s: acpi_bus_unregister_driver\n", ibm->name);
8456 BUG_ON(!ibm->acpi);
8457 acpi_bus_unregister_driver(ibm->acpi->driver);
8458 kfree(ibm->acpi->driver);
8459 ibm->acpi->driver = NULL;
8460 ibm->flags.acpi_driver_registered = 0;
8461 }
8462
8463 if (ibm->flags.init_called && ibm->exit) {
8464 ibm->exit();
8465 ibm->flags.init_called = 0;
8466 }
8467
8468 dbg_printk(TPACPI_DBG_INIT, "finished removing %s\n", ibm->name);
8469 }
8470
8471 static int __init ibm_init(struct ibm_init_struct *iibm)
8472 {
8473 int ret;
8474 struct ibm_struct *ibm = iibm->data;
8475 struct proc_dir_entry *entry;
8476
8477 BUG_ON(ibm == NULL);
8478
8479 INIT_LIST_HEAD(&ibm->all_drivers);
8480
8481 if (ibm->flags.experimental && !experimental)
8482 return 0;
8483
8484 dbg_printk(TPACPI_DBG_INIT,
8485 "probing for %s\n", ibm->name);
8486
8487 if (iibm->init) {
8488 ret = iibm->init(iibm);
8489 if (ret > 0)
8490 return 0; /* probe failed */
8491 if (ret)
8492 return ret;
8493
8494 ibm->flags.init_called = 1;
8495 }
8496
8497 if (ibm->acpi) {
8498 if (ibm->acpi->hid) {
8499 ret = register_tpacpi_subdriver(ibm);
8500 if (ret)
8501 goto err_out;
8502 }
8503
8504 if (ibm->acpi->notify) {
8505 ret = setup_acpi_notify(ibm);
8506 if (ret == -ENODEV) {
8507 printk(TPACPI_NOTICE "disabling subdriver %s\n",
8508 ibm->name);
8509 ret = 0;
8510 goto err_out;
8511 }
8512 if (ret < 0)
8513 goto err_out;
8514 }
8515 }
8516
8517 dbg_printk(TPACPI_DBG_INIT,
8518 "%s installed\n", ibm->name);
8519
8520 if (ibm->read) {
8521 mode_t mode = iibm->base_procfs_mode;
8522
8523 if (!mode)
8524 mode = S_IRUGO;
8525 if (ibm->write)
8526 mode |= S_IWUSR;
8527 entry = proc_create_data(ibm->name, mode, proc_dir,
8528 &dispatch_proc_fops, ibm);
8529 if (!entry) {
8530 printk(TPACPI_ERR "unable to create proc entry %s\n",
8531 ibm->name);
8532 ret = -ENODEV;
8533 goto err_out;
8534 }
8535 ibm->flags.proc_created = 1;
8536 }
8537
8538 list_add_tail(&ibm->all_drivers, &tpacpi_all_drivers);
8539
8540 return 0;
8541
8542 err_out:
8543 dbg_printk(TPACPI_DBG_INIT,
8544 "%s: at error exit path with result %d\n",
8545 ibm->name, ret);
8546
8547 ibm_exit(ibm);
8548 return (ret < 0)? ret : 0;
8549 }
8550
8551 /* Probing */
8552
8553 static bool __pure __init tpacpi_is_fw_digit(const char c)
8554 {
8555 return (c >= '0' && c <= '9') || (c >= 'A' && c <= 'Z');
8556 }
8557
8558 /* Most models: xxyTkkWW (#.##c); Ancient 570/600 and -SL lacks (#.##c) */
8559 static bool __pure __init tpacpi_is_valid_fw_id(const char* const s,
8560 const char t)
8561 {
8562 return s && strlen(s) >= 8 &&
8563 tpacpi_is_fw_digit(s[0]) &&
8564 tpacpi_is_fw_digit(s[1]) &&
8565 s[2] == t && s[3] == 'T' &&
8566 tpacpi_is_fw_digit(s[4]) &&
8567 tpacpi_is_fw_digit(s[5]) &&
8568 s[6] == 'W' && s[7] == 'W';
8569 }
8570
8571 /* returns 0 - probe ok, or < 0 - probe error.
8572 * Probe ok doesn't mean thinkpad found.
8573 * On error, kfree() cleanup on tp->* is not performed, caller must do it */
8574 static int __must_check __init get_thinkpad_model_data(
8575 struct thinkpad_id_data *tp)
8576 {
8577 const struct dmi_device *dev = NULL;
8578 char ec_fw_string[18];
8579 char const *s;
8580
8581 if (!tp)
8582 return -EINVAL;
8583
8584 memset(tp, 0, sizeof(*tp));
8585
8586 if (dmi_name_in_vendors("IBM"))
8587 tp->vendor = PCI_VENDOR_ID_IBM;
8588 else if (dmi_name_in_vendors("LENOVO"))
8589 tp->vendor = PCI_VENDOR_ID_LENOVO;
8590 else
8591 return 0;
8592
8593 s = dmi_get_system_info(DMI_BIOS_VERSION);
8594 tp->bios_version_str = kstrdup(s, GFP_KERNEL);
8595 if (s && !tp->bios_version_str)
8596 return -ENOMEM;
8597
8598 /* Really ancient ThinkPad 240X will fail this, which is fine */
8599 if (!tpacpi_is_valid_fw_id(tp->bios_version_str, 'E'))
8600 return 0;
8601
8602 tp->bios_model = tp->bios_version_str[0]
8603 | (tp->bios_version_str[1] << 8);
8604 tp->bios_release = (tp->bios_version_str[4] << 8)
8605 | tp->bios_version_str[5];
8606
8607 /*
8608 * ThinkPad T23 or newer, A31 or newer, R50e or newer,
8609 * X32 or newer, all Z series; Some models must have an
8610 * up-to-date BIOS or they will not be detected.
8611 *
8612 * See http://thinkwiki.org/wiki/List_of_DMI_IDs
8613 */
8614 while ((dev = dmi_find_device(DMI_DEV_TYPE_OEM_STRING, NULL, dev))) {
8615 if (sscanf(dev->name,
8616 "IBM ThinkPad Embedded Controller -[%17c",
8617 ec_fw_string) == 1) {
8618 ec_fw_string[sizeof(ec_fw_string) - 1] = 0;
8619 ec_fw_string[strcspn(ec_fw_string, " ]")] = 0;
8620
8621 tp->ec_version_str = kstrdup(ec_fw_string, GFP_KERNEL);
8622 if (!tp->ec_version_str)
8623 return -ENOMEM;
8624
8625 if (tpacpi_is_valid_fw_id(ec_fw_string, 'H')) {
8626 tp->ec_model = ec_fw_string[0]
8627 | (ec_fw_string[1] << 8);
8628 tp->ec_release = (ec_fw_string[4] << 8)
8629 | ec_fw_string[5];
8630 } else {
8631 printk(TPACPI_NOTICE
8632 "ThinkPad firmware release %s "
8633 "doesn't match the known patterns\n",
8634 ec_fw_string);
8635 printk(TPACPI_NOTICE
8636 "please report this to %s\n",
8637 TPACPI_MAIL);
8638 }
8639 break;
8640 }
8641 }
8642
8643 s = dmi_get_system_info(DMI_PRODUCT_VERSION);
8644 if (s && !strnicmp(s, "ThinkPad", 8)) {
8645 tp->model_str = kstrdup(s, GFP_KERNEL);
8646 if (!tp->model_str)
8647 return -ENOMEM;
8648 }
8649
8650 s = dmi_get_system_info(DMI_PRODUCT_NAME);
8651 tp->nummodel_str = kstrdup(s, GFP_KERNEL);
8652 if (s && !tp->nummodel_str)
8653 return -ENOMEM;
8654
8655 return 0;
8656 }
8657
8658 static int __init probe_for_thinkpad(void)
8659 {
8660 int is_thinkpad;
8661
8662 if (acpi_disabled)
8663 return -ENODEV;
8664
8665 /*
8666 * Non-ancient models have better DMI tagging, but very old models
8667 * don't. tpacpi_is_fw_known() is a cheat to help in that case.
8668 */
8669 is_thinkpad = (thinkpad_id.model_str != NULL) ||
8670 (thinkpad_id.ec_model != 0) ||
8671 tpacpi_is_fw_known();
8672
8673 /* ec is required because many other handles are relative to it */
8674 TPACPI_ACPIHANDLE_INIT(ec);
8675 if (!ec_handle) {
8676 if (is_thinkpad)
8677 printk(TPACPI_ERR
8678 "Not yet supported ThinkPad detected!\n");
8679 return -ENODEV;
8680 }
8681
8682 if (!is_thinkpad && !force_load)
8683 return -ENODEV;
8684
8685 return 0;
8686 }
8687
8688
8689 /* Module init, exit, parameters */
8690
8691 static struct ibm_init_struct ibms_init[] __initdata = {
8692 {
8693 .init = thinkpad_acpi_driver_init,
8694 .data = &thinkpad_acpi_driver_data,
8695 },
8696 {
8697 .init = hotkey_init,
8698 .data = &hotkey_driver_data,
8699 },
8700 {
8701 .init = bluetooth_init,
8702 .data = &bluetooth_driver_data,
8703 },
8704 {
8705 .init = wan_init,
8706 .data = &wan_driver_data,
8707 },
8708 {
8709 .init = uwb_init,
8710 .data = &uwb_driver_data,
8711 },
8712 #ifdef CONFIG_THINKPAD_ACPI_VIDEO
8713 {
8714 .init = video_init,
8715 .base_procfs_mode = S_IRUSR,
8716 .data = &video_driver_data,
8717 },
8718 #endif
8719 {
8720 .init = light_init,
8721 .data = &light_driver_data,
8722 },
8723 {
8724 .init = cmos_init,
8725 .data = &cmos_driver_data,
8726 },
8727 {
8728 .init = led_init,
8729 .data = &led_driver_data,
8730 },
8731 {
8732 .init = beep_init,
8733 .data = &beep_driver_data,
8734 },
8735 {
8736 .init = thermal_init,
8737 .data = &thermal_driver_data,
8738 },
8739 {
8740 .data = &ecdump_driver_data,
8741 },
8742 {
8743 .init = brightness_init,
8744 .data = &brightness_driver_data,
8745 },
8746 {
8747 .init = volume_init,
8748 .data = &volume_driver_data,
8749 },
8750 {
8751 .init = fan_init,
8752 .data = &fan_driver_data,
8753 },
8754 };
8755
8756 static int __init set_ibm_param(const char *val, struct kernel_param *kp)
8757 {
8758 unsigned int i;
8759 struct ibm_struct *ibm;
8760
8761 if (!kp || !kp->name || !val)
8762 return -EINVAL;
8763
8764 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
8765 ibm = ibms_init[i].data;
8766 WARN_ON(ibm == NULL);
8767
8768 if (!ibm || !ibm->name)
8769 continue;
8770
8771 if (strcmp(ibm->name, kp->name) == 0 && ibm->write) {
8772 if (strlen(val) > sizeof(ibms_init[i].param) - 2)
8773 return -ENOSPC;
8774 strcpy(ibms_init[i].param, val);
8775 strcat(ibms_init[i].param, ",");
8776 return 0;
8777 }
8778 }
8779
8780 return -EINVAL;
8781 }
8782
8783 module_param(experimental, int, 0444);
8784 MODULE_PARM_DESC(experimental,
8785 "Enables experimental features when non-zero");
8786
8787 module_param_named(debug, dbg_level, uint, 0);
8788 MODULE_PARM_DESC(debug, "Sets debug level bit-mask");
8789
8790 module_param(force_load, bool, 0444);
8791 MODULE_PARM_DESC(force_load,
8792 "Attempts to load the driver even on a "
8793 "mis-identified ThinkPad when true");
8794
8795 module_param_named(fan_control, fan_control_allowed, bool, 0444);
8796 MODULE_PARM_DESC(fan_control,
8797 "Enables setting fan parameters features when true");
8798
8799 module_param_named(brightness_mode, brightness_mode, uint, 0444);
8800 MODULE_PARM_DESC(brightness_mode,
8801 "Selects brightness control strategy: "
8802 "0=auto, 1=EC, 2=UCMS, 3=EC+NVRAM");
8803
8804 module_param(brightness_enable, uint, 0444);
8805 MODULE_PARM_DESC(brightness_enable,
8806 "Enables backlight control when 1, disables when 0");
8807
8808 module_param(hotkey_report_mode, uint, 0444);
8809 MODULE_PARM_DESC(hotkey_report_mode,
8810 "used for backwards compatibility with userspace, "
8811 "see documentation");
8812
8813 #ifdef CONFIG_THINKPAD_ACPI_ALSA_SUPPORT
8814 module_param_named(volume_mode, volume_mode, uint, 0444);
8815 MODULE_PARM_DESC(volume_mode,
8816 "Selects volume control strategy: "
8817 "0=auto, 1=EC, 2=N/A, 3=EC+NVRAM");
8818
8819 module_param_named(volume_capabilities, volume_capabilities, uint, 0444);
8820 MODULE_PARM_DESC(volume_capabilities,
8821 "Selects the mixer capabilites: "
8822 "0=auto, 1=volume and mute, 2=mute only");
8823
8824 module_param_named(volume_control, volume_control_allowed, bool, 0444);
8825 MODULE_PARM_DESC(volume_control,
8826 "Enables software override for the console audio "
8827 "control when true");
8828
8829 /* ALSA module API parameters */
8830 module_param_named(index, alsa_index, int, 0444);
8831 MODULE_PARM_DESC(index, "ALSA index for the ACPI EC Mixer");
8832 module_param_named(id, alsa_id, charp, 0444);
8833 MODULE_PARM_DESC(id, "ALSA id for the ACPI EC Mixer");
8834 module_param_named(enable, alsa_enable, bool, 0444);
8835 MODULE_PARM_DESC(enable, "Enable the ALSA interface for the ACPI EC Mixer");
8836 #endif /* CONFIG_THINKPAD_ACPI_ALSA_SUPPORT */
8837
8838 #define TPACPI_PARAM(feature) \
8839 module_param_call(feature, set_ibm_param, NULL, NULL, 0); \
8840 MODULE_PARM_DESC(feature, "Simulates thinkpad-acpi procfs command " \
8841 "at module load, see documentation")
8842
8843 TPACPI_PARAM(hotkey);
8844 TPACPI_PARAM(bluetooth);
8845 TPACPI_PARAM(video);
8846 TPACPI_PARAM(light);
8847 TPACPI_PARAM(cmos);
8848 TPACPI_PARAM(led);
8849 TPACPI_PARAM(beep);
8850 TPACPI_PARAM(ecdump);
8851 TPACPI_PARAM(brightness);
8852 TPACPI_PARAM(volume);
8853 TPACPI_PARAM(fan);
8854
8855 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
8856 module_param(dbg_wlswemul, uint, 0444);
8857 MODULE_PARM_DESC(dbg_wlswemul, "Enables WLSW emulation");
8858 module_param_named(wlsw_state, tpacpi_wlsw_emulstate, bool, 0);
8859 MODULE_PARM_DESC(wlsw_state,
8860 "Initial state of the emulated WLSW switch");
8861
8862 module_param(dbg_bluetoothemul, uint, 0444);
8863 MODULE_PARM_DESC(dbg_bluetoothemul, "Enables bluetooth switch emulation");
8864 module_param_named(bluetooth_state, tpacpi_bluetooth_emulstate, bool, 0);
8865 MODULE_PARM_DESC(bluetooth_state,
8866 "Initial state of the emulated bluetooth switch");
8867
8868 module_param(dbg_wwanemul, uint, 0444);
8869 MODULE_PARM_DESC(dbg_wwanemul, "Enables WWAN switch emulation");
8870 module_param_named(wwan_state, tpacpi_wwan_emulstate, bool, 0);
8871 MODULE_PARM_DESC(wwan_state,
8872 "Initial state of the emulated WWAN switch");
8873
8874 module_param(dbg_uwbemul, uint, 0444);
8875 MODULE_PARM_DESC(dbg_uwbemul, "Enables UWB switch emulation");
8876 module_param_named(uwb_state, tpacpi_uwb_emulstate, bool, 0);
8877 MODULE_PARM_DESC(uwb_state,
8878 "Initial state of the emulated UWB switch");
8879 #endif
8880
8881 static void thinkpad_acpi_module_exit(void)
8882 {
8883 struct ibm_struct *ibm, *itmp;
8884
8885 tpacpi_lifecycle = TPACPI_LIFE_EXITING;
8886
8887 list_for_each_entry_safe_reverse(ibm, itmp,
8888 &tpacpi_all_drivers,
8889 all_drivers) {
8890 ibm_exit(ibm);
8891 }
8892
8893 dbg_printk(TPACPI_DBG_INIT, "finished subdriver exit path...\n");
8894
8895 if (tpacpi_inputdev) {
8896 if (tp_features.input_device_registered)
8897 input_unregister_device(tpacpi_inputdev);
8898 else
8899 input_free_device(tpacpi_inputdev);
8900 }
8901
8902 if (tpacpi_hwmon)
8903 hwmon_device_unregister(tpacpi_hwmon);
8904
8905 if (tp_features.sensors_pdev_attrs_registered)
8906 device_remove_file(&tpacpi_sensors_pdev->dev,
8907 &dev_attr_thinkpad_acpi_pdev_name);
8908 if (tpacpi_sensors_pdev)
8909 platform_device_unregister(tpacpi_sensors_pdev);
8910 if (tpacpi_pdev)
8911 platform_device_unregister(tpacpi_pdev);
8912
8913 if (tp_features.sensors_pdrv_attrs_registered)
8914 tpacpi_remove_driver_attributes(&tpacpi_hwmon_pdriver.driver);
8915 if (tp_features.platform_drv_attrs_registered)
8916 tpacpi_remove_driver_attributes(&tpacpi_pdriver.driver);
8917
8918 if (tp_features.sensors_pdrv_registered)
8919 platform_driver_unregister(&tpacpi_hwmon_pdriver);
8920
8921 if (tp_features.platform_drv_registered)
8922 platform_driver_unregister(&tpacpi_pdriver);
8923
8924 if (proc_dir)
8925 remove_proc_entry(TPACPI_PROC_DIR, acpi_root_dir);
8926
8927 if (tpacpi_wq)
8928 destroy_workqueue(tpacpi_wq);
8929
8930 kfree(thinkpad_id.bios_version_str);
8931 kfree(thinkpad_id.ec_version_str);
8932 kfree(thinkpad_id.model_str);
8933 }
8934
8935
8936 static int __init thinkpad_acpi_module_init(void)
8937 {
8938 int ret, i;
8939
8940 tpacpi_lifecycle = TPACPI_LIFE_INIT;
8941
8942 /* Parameter checking */
8943 if (hotkey_report_mode > 2)
8944 return -EINVAL;
8945
8946 /* Driver-level probe */
8947
8948 ret = get_thinkpad_model_data(&thinkpad_id);
8949 if (ret) {
8950 printk(TPACPI_ERR
8951 "unable to get DMI data: %d\n", ret);
8952 thinkpad_acpi_module_exit();
8953 return ret;
8954 }
8955 ret = probe_for_thinkpad();
8956 if (ret) {
8957 thinkpad_acpi_module_exit();
8958 return ret;
8959 }
8960
8961 /* Driver initialization */
8962
8963 TPACPI_ACPIHANDLE_INIT(ecrd);
8964 TPACPI_ACPIHANDLE_INIT(ecwr);
8965
8966 tpacpi_wq = create_singlethread_workqueue(TPACPI_WORKQUEUE_NAME);
8967 if (!tpacpi_wq) {
8968 thinkpad_acpi_module_exit();
8969 return -ENOMEM;
8970 }
8971
8972 proc_dir = proc_mkdir(TPACPI_PROC_DIR, acpi_root_dir);
8973 if (!proc_dir) {
8974 printk(TPACPI_ERR
8975 "unable to create proc dir " TPACPI_PROC_DIR);
8976 thinkpad_acpi_module_exit();
8977 return -ENODEV;
8978 }
8979
8980 ret = platform_driver_register(&tpacpi_pdriver);
8981 if (ret) {
8982 printk(TPACPI_ERR
8983 "unable to register main platform driver\n");
8984 thinkpad_acpi_module_exit();
8985 return ret;
8986 }
8987 tp_features.platform_drv_registered = 1;
8988
8989 ret = platform_driver_register(&tpacpi_hwmon_pdriver);
8990 if (ret) {
8991 printk(TPACPI_ERR
8992 "unable to register hwmon platform driver\n");
8993 thinkpad_acpi_module_exit();
8994 return ret;
8995 }
8996 tp_features.sensors_pdrv_registered = 1;
8997
8998 ret = tpacpi_create_driver_attributes(&tpacpi_pdriver.driver);
8999 if (!ret) {
9000 tp_features.platform_drv_attrs_registered = 1;
9001 ret = tpacpi_create_driver_attributes(
9002 &tpacpi_hwmon_pdriver.driver);
9003 }
9004 if (ret) {
9005 printk(TPACPI_ERR
9006 "unable to create sysfs driver attributes\n");
9007 thinkpad_acpi_module_exit();
9008 return ret;
9009 }
9010 tp_features.sensors_pdrv_attrs_registered = 1;
9011
9012
9013 /* Device initialization */
9014 tpacpi_pdev = platform_device_register_simple(TPACPI_DRVR_NAME, -1,
9015 NULL, 0);
9016 if (IS_ERR(tpacpi_pdev)) {
9017 ret = PTR_ERR(tpacpi_pdev);
9018 tpacpi_pdev = NULL;
9019 printk(TPACPI_ERR "unable to register platform device\n");
9020 thinkpad_acpi_module_exit();
9021 return ret;
9022 }
9023 tpacpi_sensors_pdev = platform_device_register_simple(
9024 TPACPI_HWMON_DRVR_NAME,
9025 -1, NULL, 0);
9026 if (IS_ERR(tpacpi_sensors_pdev)) {
9027 ret = PTR_ERR(tpacpi_sensors_pdev);
9028 tpacpi_sensors_pdev = NULL;
9029 printk(TPACPI_ERR
9030 "unable to register hwmon platform device\n");
9031 thinkpad_acpi_module_exit();
9032 return ret;
9033 }
9034 ret = device_create_file(&tpacpi_sensors_pdev->dev,
9035 &dev_attr_thinkpad_acpi_pdev_name);
9036 if (ret) {
9037 printk(TPACPI_ERR
9038 "unable to create sysfs hwmon device attributes\n");
9039 thinkpad_acpi_module_exit();
9040 return ret;
9041 }
9042 tp_features.sensors_pdev_attrs_registered = 1;
9043 tpacpi_hwmon = hwmon_device_register(&tpacpi_sensors_pdev->dev);
9044 if (IS_ERR(tpacpi_hwmon)) {
9045 ret = PTR_ERR(tpacpi_hwmon);
9046 tpacpi_hwmon = NULL;
9047 printk(TPACPI_ERR "unable to register hwmon device\n");
9048 thinkpad_acpi_module_exit();
9049 return ret;
9050 }
9051 mutex_init(&tpacpi_inputdev_send_mutex);
9052 tpacpi_inputdev = input_allocate_device();
9053 if (!tpacpi_inputdev) {
9054 printk(TPACPI_ERR "unable to allocate input device\n");
9055 thinkpad_acpi_module_exit();
9056 return -ENOMEM;
9057 } else {
9058 /* Prepare input device, but don't register */
9059 tpacpi_inputdev->name = "ThinkPad Extra Buttons";
9060 tpacpi_inputdev->phys = TPACPI_DRVR_NAME "/input0";
9061 tpacpi_inputdev->id.bustype = BUS_HOST;
9062 tpacpi_inputdev->id.vendor = (thinkpad_id.vendor) ?
9063 thinkpad_id.vendor :
9064 PCI_VENDOR_ID_IBM;
9065 tpacpi_inputdev->id.product = TPACPI_HKEY_INPUT_PRODUCT;
9066 tpacpi_inputdev->id.version = TPACPI_HKEY_INPUT_VERSION;
9067 tpacpi_inputdev->dev.parent = &tpacpi_pdev->dev;
9068 }
9069 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
9070 ret = ibm_init(&ibms_init[i]);
9071 if (ret >= 0 && *ibms_init[i].param)
9072 ret = ibms_init[i].data->write(ibms_init[i].param);
9073 if (ret < 0) {
9074 thinkpad_acpi_module_exit();
9075 return ret;
9076 }
9077 }
9078
9079 tpacpi_lifecycle = TPACPI_LIFE_RUNNING;
9080
9081 ret = input_register_device(tpacpi_inputdev);
9082 if (ret < 0) {
9083 printk(TPACPI_ERR "unable to register input device\n");
9084 thinkpad_acpi_module_exit();
9085 return ret;
9086 } else {
9087 tp_features.input_device_registered = 1;
9088 }
9089
9090 return 0;
9091 }
9092
9093 MODULE_ALIAS(TPACPI_DRVR_SHORTNAME);
9094
9095 /*
9096 * This will autoload the driver in almost every ThinkPad
9097 * in widespread use.
9098 *
9099 * Only _VERY_ old models, like the 240, 240x and 570 lack
9100 * the HKEY event interface.
9101 */
9102 MODULE_DEVICE_TABLE(acpi, ibm_htk_device_ids);
9103
9104 /*
9105 * DMI matching for module autoloading
9106 *
9107 * See http://thinkwiki.org/wiki/List_of_DMI_IDs
9108 * See http://thinkwiki.org/wiki/BIOS_Upgrade_Downloads
9109 *
9110 * Only models listed in thinkwiki will be supported, so add yours
9111 * if it is not there yet.
9112 */
9113 #define IBM_BIOS_MODULE_ALIAS(__type) \
9114 MODULE_ALIAS("dmi:bvnIBM:bvr" __type "ET??WW*")
9115
9116 /* Ancient thinkpad BIOSes have to be identified by
9117 * BIOS type or model number, and there are far less
9118 * BIOS types than model numbers... */
9119 IBM_BIOS_MODULE_ALIAS("I[MU]"); /* 570, 570e */
9120
9121 MODULE_AUTHOR("Borislav Deianov <borislav@users.sf.net>");
9122 MODULE_AUTHOR("Henrique de Moraes Holschuh <hmh@hmh.eng.br>");
9123 MODULE_DESCRIPTION(TPACPI_DESC);
9124 MODULE_VERSION(TPACPI_VERSION);
9125 MODULE_LICENSE("GPL");
9126
9127 module_init(thinkpad_acpi_module_init);
9128 module_exit(thinkpad_acpi_module_exit);
Linux with added FPC-III support