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thinkpad-acpi: convert to seq_file
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / platform / x86 / thinkpad_acpi.c
blobc21c35e2dcc642148d7ed54e15fd30e0b47c58fd
1 /*
2 * thinkpad_acpi.c - ThinkPad ACPI Extras
3 *
4 *
5 * Copyright (C) 2004-2005 Borislav Deianov <borislav@users.sf.net>
6 * Copyright (C) 2006-2009 Henrique de Moraes Holschuh <hmh@hmh.eng.br>
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
21 * 02110-1301, USA.
22 */
23
24 #define TPACPI_VERSION "0.23"
25 #define TPACPI_SYSFS_VERSION 0x020700
26
27 /*
28 * Changelog:
29 * 2007-10-20 changelog trimmed down
30 *
31 * 2007-03-27 0.14 renamed to thinkpad_acpi and moved to
32 * drivers/misc.
33 *
34 * 2006-11-22 0.13 new maintainer
35 * changelog now lives in git commit history, and will
36 * not be updated further in-file.
37 *
38 * 2005-03-17 0.11 support for 600e, 770x
39 * thanks to Jamie Lentin <lentinj@dial.pipex.com>
40 *
41 * 2005-01-16 0.9 use MODULE_VERSION
42 * thanks to Henrik Brix Andersen <brix@gentoo.org>
43 * fix parameter passing on module loading
44 * thanks to Rusty Russell <rusty@rustcorp.com.au>
45 * thanks to Jim Radford <radford@blackbean.org>
46 * 2004-11-08 0.8 fix init error case, don't return from a macro
47 * thanks to Chris Wright <chrisw@osdl.org>
48 */
49
50 #include <linux/kernel.h>
51 #include <linux/module.h>
52 #include <linux/init.h>
53 #include <linux/types.h>
54 #include <linux/string.h>
55 #include <linux/list.h>
56 #include <linux/mutex.h>
57 #include <linux/sched.h>
58 #include <linux/kthread.h>
59 #include <linux/freezer.h>
60 #include <linux/delay.h>
61
62 #include <linux/nvram.h>
63 #include <linux/proc_fs.h>
64 #include <linux/seq_file.h>
65 #include <linux/sysfs.h>
66 #include <linux/backlight.h>
67 #include <linux/fb.h>
68 #include <linux/platform_device.h>
69 #include <linux/hwmon.h>
70 #include <linux/hwmon-sysfs.h>
71 #include <linux/input.h>
72 #include <linux/leds.h>
73 #include <linux/rfkill.h>
74 #include <asm/uaccess.h>
75
76 #include <linux/dmi.h>
77 #include <linux/jiffies.h>
78 #include <linux/workqueue.h>
79
80 #include <sound/core.h>
81 #include <sound/control.h>
82 #include <sound/initval.h>
83
84 #include <acpi/acpi_drivers.h>
85
86 #include <linux/pci_ids.h>
87
88
89 /* ThinkPad CMOS commands */
90 #define TP_CMOS_VOLUME_DOWN 0
91 #define TP_CMOS_VOLUME_UP 1
92 #define TP_CMOS_VOLUME_MUTE 2
93 #define TP_CMOS_BRIGHTNESS_UP 4
94 #define TP_CMOS_BRIGHTNESS_DOWN 5
95 #define TP_CMOS_THINKLIGHT_ON 12
96 #define TP_CMOS_THINKLIGHT_OFF 13
97
98 /* NVRAM Addresses */
99 enum tp_nvram_addr {
100 TP_NVRAM_ADDR_HK2 = 0x57,
101 TP_NVRAM_ADDR_THINKLIGHT = 0x58,
102 TP_NVRAM_ADDR_VIDEO = 0x59,
103 TP_NVRAM_ADDR_BRIGHTNESS = 0x5e,
104 TP_NVRAM_ADDR_MIXER = 0x60,
105 };
106
107 /* NVRAM bit masks */
108 enum {
109 TP_NVRAM_MASK_HKT_THINKPAD = 0x08,
110 TP_NVRAM_MASK_HKT_ZOOM = 0x20,
111 TP_NVRAM_MASK_HKT_DISPLAY = 0x40,
112 TP_NVRAM_MASK_HKT_HIBERNATE = 0x80,
113 TP_NVRAM_MASK_THINKLIGHT = 0x10,
114 TP_NVRAM_MASK_HKT_DISPEXPND = 0x30,
115 TP_NVRAM_MASK_HKT_BRIGHTNESS = 0x20,
116 TP_NVRAM_MASK_LEVEL_BRIGHTNESS = 0x0f,
117 TP_NVRAM_POS_LEVEL_BRIGHTNESS = 0,
118 TP_NVRAM_MASK_MUTE = 0x40,
119 TP_NVRAM_MASK_HKT_VOLUME = 0x80,
120 TP_NVRAM_MASK_LEVEL_VOLUME = 0x0f,
121 TP_NVRAM_POS_LEVEL_VOLUME = 0,
122 };
123
124 /* ACPI HIDs */
125 #define TPACPI_ACPI_HKEY_HID "IBM0068"
126
127 /* Input IDs */
128 #define TPACPI_HKEY_INPUT_PRODUCT 0x5054 /* "TP" */
129 #define TPACPI_HKEY_INPUT_VERSION 0x4101
130
131 /* ACPI \WGSV commands */
132 enum {
133 TP_ACPI_WGSV_GET_STATE = 0x01, /* Get state information */
134 TP_ACPI_WGSV_PWR_ON_ON_RESUME = 0x02, /* Resume WWAN powered on */
135 TP_ACPI_WGSV_PWR_OFF_ON_RESUME = 0x03, /* Resume WWAN powered off */
136 TP_ACPI_WGSV_SAVE_STATE = 0x04, /* Save state for S4/S5 */
137 };
138
139 /* TP_ACPI_WGSV_GET_STATE bits */
140 enum {
141 TP_ACPI_WGSV_STATE_WWANEXIST = 0x0001, /* WWAN hw available */
142 TP_ACPI_WGSV_STATE_WWANPWR = 0x0002, /* WWAN radio enabled */
143 TP_ACPI_WGSV_STATE_WWANPWRRES = 0x0004, /* WWAN state at resume */
144 TP_ACPI_WGSV_STATE_WWANBIOSOFF = 0x0008, /* WWAN disabled in BIOS */
145 TP_ACPI_WGSV_STATE_BLTHEXIST = 0x0001, /* BLTH hw available */
146 TP_ACPI_WGSV_STATE_BLTHPWR = 0x0002, /* BLTH radio enabled */
147 TP_ACPI_WGSV_STATE_BLTHPWRRES = 0x0004, /* BLTH state at resume */
148 TP_ACPI_WGSV_STATE_BLTHBIOSOFF = 0x0008, /* BLTH disabled in BIOS */
149 TP_ACPI_WGSV_STATE_UWBEXIST = 0x0010, /* UWB hw available */
150 TP_ACPI_WGSV_STATE_UWBPWR = 0x0020, /* UWB radio enabled */
151 };
152
153 /* HKEY events */
154 enum tpacpi_hkey_event_t {
155 /* Hotkey-related */
156 TP_HKEY_EV_HOTKEY_BASE = 0x1001, /* first hotkey (FN+F1) */
157 TP_HKEY_EV_BRGHT_UP = 0x1010, /* Brightness up */
158 TP_HKEY_EV_BRGHT_DOWN = 0x1011, /* Brightness down */
159 TP_HKEY_EV_VOL_UP = 0x1015, /* Volume up or unmute */
160 TP_HKEY_EV_VOL_DOWN = 0x1016, /* Volume down or unmute */
161 TP_HKEY_EV_VOL_MUTE = 0x1017, /* Mixer output mute */
162
163 /* Reasons for waking up from S3/S4 */
164 TP_HKEY_EV_WKUP_S3_UNDOCK = 0x2304, /* undock requested, S3 */
165 TP_HKEY_EV_WKUP_S4_UNDOCK = 0x2404, /* undock requested, S4 */
166 TP_HKEY_EV_WKUP_S3_BAYEJ = 0x2305, /* bay ejection req, S3 */
167 TP_HKEY_EV_WKUP_S4_BAYEJ = 0x2405, /* bay ejection req, S4 */
168 TP_HKEY_EV_WKUP_S3_BATLOW = 0x2313, /* battery empty, S3 */
169 TP_HKEY_EV_WKUP_S4_BATLOW = 0x2413, /* battery empty, S4 */
170
171 /* Auto-sleep after eject request */
172 TP_HKEY_EV_BAYEJ_ACK = 0x3003, /* bay ejection complete */
173 TP_HKEY_EV_UNDOCK_ACK = 0x4003, /* undock complete */
174
175 /* Misc bay events */
176 TP_HKEY_EV_OPTDRV_EJ = 0x3006, /* opt. drive tray ejected */
177
178 /* User-interface events */
179 TP_HKEY_EV_LID_CLOSE = 0x5001, /* laptop lid closed */
180 TP_HKEY_EV_LID_OPEN = 0x5002, /* laptop lid opened */
181 TP_HKEY_EV_TABLET_TABLET = 0x5009, /* tablet swivel up */
182 TP_HKEY_EV_TABLET_NOTEBOOK = 0x500a, /* tablet swivel down */
183 TP_HKEY_EV_PEN_INSERTED = 0x500b, /* tablet pen inserted */
184 TP_HKEY_EV_PEN_REMOVED = 0x500c, /* tablet pen removed */
185 TP_HKEY_EV_BRGHT_CHANGED = 0x5010, /* backlight control event */
186
187 /* Thermal events */
188 TP_HKEY_EV_ALARM_BAT_HOT = 0x6011, /* battery too hot */
189 TP_HKEY_EV_ALARM_BAT_XHOT = 0x6012, /* battery critically hot */
190 TP_HKEY_EV_ALARM_SENSOR_HOT = 0x6021, /* sensor too hot */
191 TP_HKEY_EV_ALARM_SENSOR_XHOT = 0x6022, /* sensor critically hot */
192 TP_HKEY_EV_THM_TABLE_CHANGED = 0x6030, /* thermal table changed */
193
194 /* Misc */
195 TP_HKEY_EV_RFKILL_CHANGED = 0x7000, /* rfkill switch changed */
196 };
197
198 /****************************************************************************
199 * Main driver
200 */
201
202 #define TPACPI_NAME "thinkpad"
203 #define TPACPI_DESC "ThinkPad ACPI Extras"
204 #define TPACPI_FILE TPACPI_NAME "_acpi"
205 #define TPACPI_URL "http://ibm-acpi.sf.net/"
206 #define TPACPI_MAIL "ibm-acpi-devel@lists.sourceforge.net"
207
208 #define TPACPI_PROC_DIR "ibm"
209 #define TPACPI_ACPI_EVENT_PREFIX "ibm"
210 #define TPACPI_DRVR_NAME TPACPI_FILE
211 #define TPACPI_DRVR_SHORTNAME "tpacpi"
212 #define TPACPI_HWMON_DRVR_NAME TPACPI_NAME "_hwmon"
213
214 #define TPACPI_NVRAM_KTHREAD_NAME "ktpacpi_nvramd"
215 #define TPACPI_WORKQUEUE_NAME "ktpacpid"
216
217 #define TPACPI_MAX_ACPI_ARGS 3
218
219 /* printk headers */
220 #define TPACPI_LOG TPACPI_FILE ": "
221 #define TPACPI_EMERG KERN_EMERG TPACPI_LOG
222 #define TPACPI_ALERT KERN_ALERT TPACPI_LOG
223 #define TPACPI_CRIT KERN_CRIT TPACPI_LOG
224 #define TPACPI_ERR KERN_ERR TPACPI_LOG
225 #define TPACPI_WARN KERN_WARNING TPACPI_LOG
226 #define TPACPI_NOTICE KERN_NOTICE TPACPI_LOG
227 #define TPACPI_INFO KERN_INFO TPACPI_LOG
228 #define TPACPI_DEBUG KERN_DEBUG TPACPI_LOG
229
230 /* Debugging printk groups */
231 #define TPACPI_DBG_ALL 0xffff
232 #define TPACPI_DBG_DISCLOSETASK 0x8000
233 #define TPACPI_DBG_INIT 0x0001
234 #define TPACPI_DBG_EXIT 0x0002
235 #define TPACPI_DBG_RFKILL 0x0004
236 #define TPACPI_DBG_HKEY 0x0008
237 #define TPACPI_DBG_FAN 0x0010
238 #define TPACPI_DBG_BRGHT 0x0020
239 #define TPACPI_DBG_MIXER 0x0040
240
241 #define onoff(status, bit) ((status) & (1 << (bit)) ? "on" : "off")
242 #define enabled(status, bit) ((status) & (1 << (bit)) ? "enabled" : "disabled")
243 #define strlencmp(a, b) (strncmp((a), (b), strlen(b)))
244
245
246 /****************************************************************************
247 * Driver-wide structs and misc. variables
248 */
249
250 struct ibm_struct;
251
252 struct tp_acpi_drv_struct {
253 const struct acpi_device_id *hid;
254 struct acpi_driver *driver;
255
256 void (*notify) (struct ibm_struct *, u32);
257 acpi_handle *handle;
258 u32 type;
259 struct acpi_device *device;
260 };
261
262 struct ibm_struct {
263 char *name;
264
265 int (*read) (struct seq_file *);
266 int (*write) (char *);
267 void (*exit) (void);
268 void (*resume) (void);
269 void (*suspend) (pm_message_t state);
270 void (*shutdown) (void);
271
272 struct list_head all_drivers;
273
274 struct tp_acpi_drv_struct *acpi;
275
276 struct {
277 u8 acpi_driver_registered:1;
278 u8 acpi_notify_installed:1;
279 u8 proc_created:1;
280 u8 init_called:1;
281 u8 experimental:1;
282 } flags;
283 };
284
285 struct ibm_init_struct {
286 char param[32];
287
288 int (*init) (struct ibm_init_struct *);
289 struct ibm_struct *data;
290 };
291
292 static struct {
293 u32 bluetooth:1;
294 u32 hotkey:1;
295 u32 hotkey_mask:1;
296 u32 hotkey_wlsw:1;
297 u32 hotkey_tablet:1;
298 u32 light:1;
299 u32 light_status:1;
300 u32 bright_16levels:1;
301 u32 bright_acpimode:1;
302 u32 wan:1;
303 u32 uwb:1;
304 u32 fan_ctrl_status_undef:1;
305 u32 second_fan:1;
306 u32 beep_needs_two_args:1;
307 u32 mixer_no_level_control:1;
308 u32 input_device_registered:1;
309 u32 platform_drv_registered:1;
310 u32 platform_drv_attrs_registered:1;
311 u32 sensors_pdrv_registered:1;
312 u32 sensors_pdrv_attrs_registered:1;
313 u32 sensors_pdev_attrs_registered:1;
314 u32 hotkey_poll_active:1;
315 } tp_features;
316
317 static struct {
318 u16 hotkey_mask_ff:1;
319 u16 volume_ctrl_forbidden:1;
320 } tp_warned;
321
322 struct thinkpad_id_data {
323 unsigned int vendor; /* ThinkPad vendor:
324 * PCI_VENDOR_ID_IBM/PCI_VENDOR_ID_LENOVO */
325
326 char *bios_version_str; /* Something like 1ZET51WW (1.03z) */
327 char *ec_version_str; /* Something like 1ZHT51WW-1.04a */
328
329 u16 bios_model; /* 1Y = 0x5931, 0 = unknown */
330 u16 ec_model;
331 u16 bios_release; /* 1ZETK1WW = 0x314b, 0 = unknown */
332 u16 ec_release;
333
334 char *model_str; /* ThinkPad T43 */
335 char *nummodel_str; /* 9384A9C for a 9384-A9C model */
336 };
337 static struct thinkpad_id_data thinkpad_id;
338
339 static enum {
340 TPACPI_LIFE_INIT = 0,
341 TPACPI_LIFE_RUNNING,
342 TPACPI_LIFE_EXITING,
343 } tpacpi_lifecycle;
344
345 static int experimental;
346 static u32 dbg_level;
347
348 static struct workqueue_struct *tpacpi_wq;
349
350 enum led_status_t {
351 TPACPI_LED_OFF = 0,
352 TPACPI_LED_ON,
353 TPACPI_LED_BLINK,
354 };
355
356 /* Special LED class that can defer work */
357 struct tpacpi_led_classdev {
358 struct led_classdev led_classdev;
359 struct work_struct work;
360 enum led_status_t new_state;
361 unsigned int led;
362 };
363
364 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
365 static int dbg_wlswemul;
366 static int tpacpi_wlsw_emulstate;
367 static int dbg_bluetoothemul;
368 static int tpacpi_bluetooth_emulstate;
369 static int dbg_wwanemul;
370 static int tpacpi_wwan_emulstate;
371 static int dbg_uwbemul;
372 static int tpacpi_uwb_emulstate;
373 #endif
374
375
376 /*************************************************************************
377 * Debugging helpers
378 */
379
380 #define dbg_printk(a_dbg_level, format, arg...) \
381 do { if (dbg_level & (a_dbg_level)) \
382 printk(TPACPI_DEBUG "%s: " format, __func__ , ## arg); \
383 } while (0)
384
385 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
386 #define vdbg_printk dbg_printk
387 static const char *str_supported(int is_supported);
388 #else
389 #define vdbg_printk(a_dbg_level, format, arg...) \
390 do { } while (0)
391 #endif
392
393 static void tpacpi_log_usertask(const char * const what)
394 {
395 printk(TPACPI_DEBUG "%s: access by process with PID %d\n",
396 what, task_tgid_vnr(current));
397 }
398
399 #define tpacpi_disclose_usertask(what, format, arg...) \
400 do { \
401 if (unlikely( \
402 (dbg_level & TPACPI_DBG_DISCLOSETASK) && \
403 (tpacpi_lifecycle == TPACPI_LIFE_RUNNING))) { \
404 printk(TPACPI_DEBUG "%s: PID %d: " format, \
405 what, task_tgid_vnr(current), ## arg); \
406 } \
407 } while (0)
408
409 /*
410 * Quirk handling helpers
411 *
412 * ThinkPad IDs and versions seen in the field so far
413 * are two-characters from the set [0-9A-Z], i.e. base 36.
414 *
415 * We use values well outside that range as specials.
416 */
417
418 #define TPACPI_MATCH_ANY 0xffffU
419 #define TPACPI_MATCH_UNKNOWN 0U
420
421 /* TPID('1', 'Y') == 0x5931 */
422 #define TPID(__c1, __c2) (((__c2) << 8) | (__c1))
423
424 #define TPACPI_Q_IBM(__id1, __id2, __quirk) \
425 { .vendor = PCI_VENDOR_ID_IBM, \
426 .bios = TPID(__id1, __id2), \
427 .ec = TPACPI_MATCH_ANY, \
428 .quirks = (__quirk) }
429
430 #define TPACPI_Q_LNV(__id1, __id2, __quirk) \
431 { .vendor = PCI_VENDOR_ID_LENOVO, \
432 .bios = TPID(__id1, __id2), \
433 .ec = TPACPI_MATCH_ANY, \
434 .quirks = (__quirk) }
435
436 #define TPACPI_QEC_LNV(__id1, __id2, __quirk) \
437 { .vendor = PCI_VENDOR_ID_LENOVO, \
438 .bios = TPACPI_MATCH_ANY, \
439 .ec = TPID(__id1, __id2), \
440 .quirks = (__quirk) }
441
442 struct tpacpi_quirk {
443 unsigned int vendor;
444 u16 bios;
445 u16 ec;
446 unsigned long quirks;
447 };
448
449 /**
450 * tpacpi_check_quirks() - search BIOS/EC version on a list
451 * @qlist: array of &struct tpacpi_quirk
452 * @qlist_size: number of elements in @qlist
453 *
454 * Iterates over a quirks list until one is found that matches the
455 * ThinkPad's vendor, BIOS and EC model.
456 *
457 * Returns 0 if nothing matches, otherwise returns the quirks field of
458 * the matching &struct tpacpi_quirk entry.
459 *
460 * The match criteria is: vendor, ec and bios much match.
461 */
462 static unsigned long __init tpacpi_check_quirks(
463 const struct tpacpi_quirk *qlist,
464 unsigned int qlist_size)
465 {
466 while (qlist_size) {
467 if ((qlist->vendor == thinkpad_id.vendor ||
468 qlist->vendor == TPACPI_MATCH_ANY) &&
469 (qlist->bios == thinkpad_id.bios_model ||
470 qlist->bios == TPACPI_MATCH_ANY) &&
471 (qlist->ec == thinkpad_id.ec_model ||
472 qlist->ec == TPACPI_MATCH_ANY))
473 return qlist->quirks;
474
475 qlist_size--;
476 qlist++;
477 }
478 return 0;
479 }
480
481
482 /****************************************************************************
483 ****************************************************************************
484 *
485 * ACPI Helpers and device model
486 *
487 ****************************************************************************
488 ****************************************************************************/
489
490 /*************************************************************************
491 * ACPI basic handles
492 */
493
494 static acpi_handle root_handle;
495
496 #define TPACPI_HANDLE(object, parent, paths...) \
497 static acpi_handle object##_handle; \
498 static acpi_handle *object##_parent = &parent##_handle; \
499 static char *object##_path; \
500 static char *object##_paths[] = { paths }
501
502 TPACPI_HANDLE(ec, root, "\\_SB.PCI0.ISA.EC0", /* 240, 240x */
503 "\\_SB.PCI.ISA.EC", /* 570 */
504 "\\_SB.PCI0.ISA0.EC0", /* 600e/x, 770e, 770x */
505 "\\_SB.PCI0.ISA.EC", /* A21e, A2xm/p, T20-22, X20-21 */
506 "\\_SB.PCI0.AD4S.EC0", /* i1400, R30 */
507 "\\_SB.PCI0.ICH3.EC0", /* R31 */
508 "\\_SB.PCI0.LPC.EC", /* all others */
509 );
510
511 TPACPI_HANDLE(ecrd, ec, "ECRD"); /* 570 */
512 TPACPI_HANDLE(ecwr, ec, "ECWR"); /* 570 */
513
514 TPACPI_HANDLE(cmos, root, "\\UCMS", /* R50, R50e, R50p, R51, */
515 /* T4x, X31, X40 */
516 "\\CMOS", /* A3x, G4x, R32, T23, T30, X22-24, X30 */
517 "\\CMS", /* R40, R40e */
518 ); /* all others */
519
520 TPACPI_HANDLE(hkey, ec, "\\_SB.HKEY", /* 600e/x, 770e, 770x */
521 "^HKEY", /* R30, R31 */
522 "HKEY", /* all others */
523 ); /* 570 */
524
525 TPACPI_HANDLE(vid, root, "\\_SB.PCI.AGP.VGA", /* 570 */
526 "\\_SB.PCI0.AGP0.VID0", /* 600e/x, 770x */
527 "\\_SB.PCI0.VID0", /* 770e */
528 "\\_SB.PCI0.VID", /* A21e, G4x, R50e, X30, X40 */
529 "\\_SB.PCI0.AGP.VID", /* all others */
530 ); /* R30, R31 */
531
532
533 /*************************************************************************
534 * ACPI helpers
535 */
536
537 static int acpi_evalf(acpi_handle handle,
538 void *res, char *method, char *fmt, ...)
539 {
540 char *fmt0 = fmt;
541 struct acpi_object_list params;
542 union acpi_object in_objs[TPACPI_MAX_ACPI_ARGS];
543 struct acpi_buffer result, *resultp;
544 union acpi_object out_obj;
545 acpi_status status;
546 va_list ap;
547 char res_type;
548 int success;
549 int quiet;
550
551 if (!*fmt) {
552 printk(TPACPI_ERR "acpi_evalf() called with empty format\n");
553 return 0;
554 }
555
556 if (*fmt == 'q') {
557 quiet = 1;
558 fmt++;
559 } else
560 quiet = 0;
561
562 res_type = *(fmt++);
563
564 params.count = 0;
565 params.pointer = &in_objs[0];
566
567 va_start(ap, fmt);
568 while (*fmt) {
569 char c = *(fmt++);
570 switch (c) {
571 case 'd': /* int */
572 in_objs[params.count].integer.value = va_arg(ap, int);
573 in_objs[params.count++].type = ACPI_TYPE_INTEGER;
574 break;
575 /* add more types as needed */
576 default:
577 printk(TPACPI_ERR "acpi_evalf() called "
578 "with invalid format character '%c'\n", c);
579 return 0;
580 }
581 }
582 va_end(ap);
583
584 if (res_type != 'v') {
585 result.length = sizeof(out_obj);
586 result.pointer = &out_obj;
587 resultp = &result;
588 } else
589 resultp = NULL;
590
591 status = acpi_evaluate_object(handle, method, &params, resultp);
592
593 switch (res_type) {
594 case 'd': /* int */
595 if (res)
596 *(int *)res = out_obj.integer.value;
597 success = status == AE_OK && out_obj.type == ACPI_TYPE_INTEGER;
598 break;
599 case 'v': /* void */
600 success = status == AE_OK;
601 break;
602 /* add more types as needed */
603 default:
604 printk(TPACPI_ERR "acpi_evalf() called "
605 "with invalid format character '%c'\n", res_type);
606 return 0;
607 }
608
609 if (!success && !quiet)
610 printk(TPACPI_ERR "acpi_evalf(%s, %s, ...) failed: %d\n",
611 method, fmt0, status);
612
613 return success;
614 }
615
616 static int acpi_ec_read(int i, u8 *p)
617 {
618 int v;
619
620 if (ecrd_handle) {
621 if (!acpi_evalf(ecrd_handle, &v, NULL, "dd", i))
622 return 0;
623 *p = v;
624 } else {
625 if (ec_read(i, p) < 0)
626 return 0;
627 }
628
629 return 1;
630 }
631
632 static int acpi_ec_write(int i, u8 v)
633 {
634 if (ecwr_handle) {
635 if (!acpi_evalf(ecwr_handle, NULL, NULL, "vdd", i, v))
636 return 0;
637 } else {
638 if (ec_write(i, v) < 0)
639 return 0;
640 }
641
642 return 1;
643 }
644
645 static int issue_thinkpad_cmos_command(int cmos_cmd)
646 {
647 if (!cmos_handle)
648 return -ENXIO;
649
650 if (!acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd))
651 return -EIO;
652
653 return 0;
654 }
655
656 /*************************************************************************
657 * ACPI device model
658 */
659
660 #define TPACPI_ACPIHANDLE_INIT(object) \
661 drv_acpi_handle_init(#object, &object##_handle, *object##_parent, \
662 object##_paths, ARRAY_SIZE(object##_paths), &object##_path)
663
664 static void drv_acpi_handle_init(char *name,
665 acpi_handle *handle, acpi_handle parent,
666 char **paths, int num_paths, char **path)
667 {
668 int i;
669 acpi_status status;
670
671 vdbg_printk(TPACPI_DBG_INIT, "trying to locate ACPI handle for %s\n",
672 name);
673
674 for (i = 0; i < num_paths; i++) {
675 status = acpi_get_handle(parent, paths[i], handle);
676 if (ACPI_SUCCESS(status)) {
677 *path = paths[i];
678 dbg_printk(TPACPI_DBG_INIT,
679 "Found ACPI handle %s for %s\n",
680 *path, name);
681 return;
682 }
683 }
684
685 vdbg_printk(TPACPI_DBG_INIT, "ACPI handle for %s not found\n",
686 name);
687 *handle = NULL;
688 }
689
690 static void dispatch_acpi_notify(acpi_handle handle, u32 event, void *data)
691 {
692 struct ibm_struct *ibm = data;
693
694 if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
695 return;
696
697 if (!ibm || !ibm->acpi || !ibm->acpi->notify)
698 return;
699
700 ibm->acpi->notify(ibm, event);
701 }
702
703 static int __init setup_acpi_notify(struct ibm_struct *ibm)
704 {
705 acpi_status status;
706 int rc;
707
708 BUG_ON(!ibm->acpi);
709
710 if (!*ibm->acpi->handle)
711 return 0;
712
713 vdbg_printk(TPACPI_DBG_INIT,
714 "setting up ACPI notify for %s\n", ibm->name);
715
716 rc = acpi_bus_get_device(*ibm->acpi->handle, &ibm->acpi->device);
717 if (rc < 0) {
718 printk(TPACPI_ERR "acpi_bus_get_device(%s) failed: %d\n",
719 ibm->name, rc);
720 return -ENODEV;
721 }
722
723 ibm->acpi->device->driver_data = ibm;
724 sprintf(acpi_device_class(ibm->acpi->device), "%s/%s",
725 TPACPI_ACPI_EVENT_PREFIX,
726 ibm->name);
727
728 status = acpi_install_notify_handler(*ibm->acpi->handle,
729 ibm->acpi->type, dispatch_acpi_notify, ibm);
730 if (ACPI_FAILURE(status)) {
731 if (status == AE_ALREADY_EXISTS) {
732 printk(TPACPI_NOTICE
733 "another device driver is already "
734 "handling %s events\n", ibm->name);
735 } else {
736 printk(TPACPI_ERR
737 "acpi_install_notify_handler(%s) failed: %d\n",
738 ibm->name, status);
739 }
740 return -ENODEV;
741 }
742 ibm->flags.acpi_notify_installed = 1;
743 return 0;
744 }
745
746 static int __init tpacpi_device_add(struct acpi_device *device)
747 {
748 return 0;
749 }
750
751 static int __init register_tpacpi_subdriver(struct ibm_struct *ibm)
752 {
753 int rc;
754
755 dbg_printk(TPACPI_DBG_INIT,
756 "registering %s as an ACPI driver\n", ibm->name);
757
758 BUG_ON(!ibm->acpi);
759
760 ibm->acpi->driver = kzalloc(sizeof(struct acpi_driver), GFP_KERNEL);
761 if (!ibm->acpi->driver) {
762 printk(TPACPI_ERR
763 "failed to allocate memory for ibm->acpi->driver\n");
764 return -ENOMEM;
765 }
766
767 sprintf(ibm->acpi->driver->name, "%s_%s", TPACPI_NAME, ibm->name);
768 ibm->acpi->driver->ids = ibm->acpi->hid;
769
770 ibm->acpi->driver->ops.add = &tpacpi_device_add;
771
772 rc = acpi_bus_register_driver(ibm->acpi->driver);
773 if (rc < 0) {
774 printk(TPACPI_ERR "acpi_bus_register_driver(%s) failed: %d\n",
775 ibm->name, rc);
776 kfree(ibm->acpi->driver);
777 ibm->acpi->driver = NULL;
778 } else if (!rc)
779 ibm->flags.acpi_driver_registered = 1;
780
781 return rc;
782 }
783
784
785 /****************************************************************************
786 ****************************************************************************
787 *
788 * Procfs Helpers
789 *
790 ****************************************************************************
791 ****************************************************************************/
792
793 static int dispatch_proc_show(struct seq_file *m, void *v)
794 {
795 struct ibm_struct *ibm = m->private;
796
797 if (!ibm || !ibm->read)
798 return -EINVAL;
799 return ibm->read(m);
800 }
801
802 static int dispatch_proc_open(struct inode *inode, struct file *file)
803 {
804 return single_open(file, dispatch_proc_show, PDE(inode)->data);
805 }
806
807 static ssize_t dispatch_proc_write(struct file *file,
808 const char __user *userbuf,
809 size_t count, loff_t *pos)
810 {
811 struct ibm_struct *ibm = PDE(file->f_path.dentry->d_inode)->data;
812 char *kernbuf;
813 int ret;
814
815 if (!ibm || !ibm->write)
816 return -EINVAL;
817 if (count > PAGE_SIZE - 2)
818 return -EINVAL;
819
820 kernbuf = kmalloc(count + 2, GFP_KERNEL);
821 if (!kernbuf)
822 return -ENOMEM;
823
824 if (copy_from_user(kernbuf, userbuf, count)) {
825 kfree(kernbuf);
826 return -EFAULT;
827 }
828
829 kernbuf[count] = 0;
830 strcat(kernbuf, ",");
831 ret = ibm->write(kernbuf);
832 if (ret == 0)
833 ret = count;
834
835 kfree(kernbuf);
836
837 return ret;
838 }
839
840 static const struct file_operations dispatch_proc_fops = {
841 .owner = THIS_MODULE,
842 .open = dispatch_proc_open,
843 .read = seq_read,
844 .llseek = seq_lseek,
845 .release = single_release,
846 .write = dispatch_proc_write,
847 };
848
849 static char *next_cmd(char **cmds)
850 {
851 char *start = *cmds;
852 char *end;
853
854 while ((end = strchr(start, ',')) && end == start)
855 start = end + 1;
856
857 if (!end)
858 return NULL;
859
860 *end = 0;
861 *cmds = end + 1;
862 return start;
863 }
864
865
866 /****************************************************************************
867 ****************************************************************************
868 *
869 * Device model: input, hwmon and platform
870 *
871 ****************************************************************************
872 ****************************************************************************/
873
874 static struct platform_device *tpacpi_pdev;
875 static struct platform_device *tpacpi_sensors_pdev;
876 static struct device *tpacpi_hwmon;
877 static struct input_dev *tpacpi_inputdev;
878 static struct mutex tpacpi_inputdev_send_mutex;
879 static LIST_HEAD(tpacpi_all_drivers);
880
881 static int tpacpi_suspend_handler(struct platform_device *pdev,
882 pm_message_t state)
883 {
884 struct ibm_struct *ibm, *itmp;
885
886 list_for_each_entry_safe(ibm, itmp,
887 &tpacpi_all_drivers,
888 all_drivers) {
889 if (ibm->suspend)
890 (ibm->suspend)(state);
891 }
892
893 return 0;
894 }
895
896 static int tpacpi_resume_handler(struct platform_device *pdev)
897 {
898 struct ibm_struct *ibm, *itmp;
899
900 list_for_each_entry_safe(ibm, itmp,
901 &tpacpi_all_drivers,
902 all_drivers) {
903 if (ibm->resume)
904 (ibm->resume)();
905 }
906
907 return 0;
908 }
909
910 static void tpacpi_shutdown_handler(struct platform_device *pdev)
911 {
912 struct ibm_struct *ibm, *itmp;
913
914 list_for_each_entry_safe(ibm, itmp,
915 &tpacpi_all_drivers,
916 all_drivers) {
917 if (ibm->shutdown)
918 (ibm->shutdown)();
919 }
920 }
921
922 static struct platform_driver tpacpi_pdriver = {
923 .driver = {
924 .name = TPACPI_DRVR_NAME,
925 .owner = THIS_MODULE,
926 },
927 .suspend = tpacpi_suspend_handler,
928 .resume = tpacpi_resume_handler,
929 .shutdown = tpacpi_shutdown_handler,
930 };
931
932 static struct platform_driver tpacpi_hwmon_pdriver = {
933 .driver = {
934 .name = TPACPI_HWMON_DRVR_NAME,
935 .owner = THIS_MODULE,
936 },
937 };
938
939 /*************************************************************************
940 * sysfs support helpers
941 */
942
943 struct attribute_set {
944 unsigned int members, max_members;
945 struct attribute_group group;
946 };
947
948 struct attribute_set_obj {
949 struct attribute_set s;
950 struct attribute *a;
951 } __attribute__((packed));
952
953 static struct attribute_set *create_attr_set(unsigned int max_members,
954 const char *name)
955 {
956 struct attribute_set_obj *sobj;
957
958 if (max_members == 0)
959 return NULL;
960
961 /* Allocates space for implicit NULL at the end too */
962 sobj = kzalloc(sizeof(struct attribute_set_obj) +
963 max_members * sizeof(struct attribute *),
964 GFP_KERNEL);
965 if (!sobj)
966 return NULL;
967 sobj->s.max_members = max_members;
968 sobj->s.group.attrs = &sobj->a;
969 sobj->s.group.name = name;
970
971 return &sobj->s;
972 }
973
974 #define destroy_attr_set(_set) \
975 kfree(_set);
976
977 /* not multi-threaded safe, use it in a single thread per set */
978 static int add_to_attr_set(struct attribute_set *s, struct attribute *attr)
979 {
980 if (!s || !attr)
981 return -EINVAL;
982
983 if (s->members >= s->max_members)
984 return -ENOMEM;
985
986 s->group.attrs[s->members] = attr;
987 s->members++;
988
989 return 0;
990 }
991
992 static int add_many_to_attr_set(struct attribute_set *s,
993 struct attribute **attr,
994 unsigned int count)
995 {
996 int i, res;
997
998 for (i = 0; i < count; i++) {
999 res = add_to_attr_set(s, attr[i]);
1000 if (res)
1001 return res;
1002 }
1003
1004 return 0;
1005 }
1006
1007 static void delete_attr_set(struct attribute_set *s, struct kobject *kobj)
1008 {
1009 sysfs_remove_group(kobj, &s->group);
1010 destroy_attr_set(s);
1011 }
1012
1013 #define register_attr_set_with_sysfs(_attr_set, _kobj) \
1014 sysfs_create_group(_kobj, &_attr_set->group)
1015
1016 static int parse_strtoul(const char *buf,
1017 unsigned long max, unsigned long *value)
1018 {
1019 char *endp;
1020
1021 while (*buf && isspace(*buf))
1022 buf++;
1023 *value = simple_strtoul(buf, &endp, 0);
1024 while (*endp && isspace(*endp))
1025 endp++;
1026 if (*endp || *value > max)
1027 return -EINVAL;
1028
1029 return 0;
1030 }
1031
1032 static void tpacpi_disable_brightness_delay(void)
1033 {
1034 if (acpi_evalf(hkey_handle, NULL, "PWMS", "qvd", 0))
1035 printk(TPACPI_NOTICE
1036 "ACPI backlight control delay disabled\n");
1037 }
1038
1039 static int __init tpacpi_query_bcl_levels(acpi_handle handle)
1040 {
1041 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
1042 union acpi_object *obj;
1043 int rc;
1044
1045 if (ACPI_SUCCESS(acpi_evaluate_object(handle, NULL, NULL, &buffer))) {
1046 obj = (union acpi_object *)buffer.pointer;
1047 if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) {
1048 printk(TPACPI_ERR "Unknown _BCL data, "
1049 "please report this to %s\n", TPACPI_MAIL);
1050 rc = 0;
1051 } else {
1052 rc = obj->package.count;
1053 }
1054 } else {
1055 return 0;
1056 }
1057
1058 kfree(buffer.pointer);
1059 return rc;
1060 }
1061
1062 static acpi_status __init tpacpi_acpi_walk_find_bcl(acpi_handle handle,
1063 u32 lvl, void *context, void **rv)
1064 {
1065 char name[ACPI_PATH_SEGMENT_LENGTH];
1066 struct acpi_buffer buffer = { sizeof(name), &name };
1067
1068 if (ACPI_SUCCESS(acpi_get_name(handle, ACPI_SINGLE_NAME, &buffer)) &&
1069 !strncmp("_BCL", name, sizeof(name) - 1)) {
1070 BUG_ON(!rv || !*rv);
1071 **(int **)rv = tpacpi_query_bcl_levels(handle);
1072 return AE_CTRL_TERMINATE;
1073 } else {
1074 return AE_OK;
1075 }
1076 }
1077
1078 /*
1079 * Returns 0 (no ACPI _BCL or _BCL invalid), or size of brightness map
1080 */
1081 static int __init tpacpi_check_std_acpi_brightness_support(void)
1082 {
1083 int status;
1084 int bcl_levels = 0;
1085 void *bcl_ptr = &bcl_levels;
1086
1087 if (!vid_handle) {
1088 TPACPI_ACPIHANDLE_INIT(vid);
1089 }
1090 if (!vid_handle)
1091 return 0;
1092
1093 /*
1094 * Search for a _BCL method, and execute it. This is safe on all
1095 * ThinkPads, and as a side-effect, _BCL will place a Lenovo Vista
1096 * BIOS in ACPI backlight control mode. We do NOT have to care
1097 * about calling the _BCL method in an enabled video device, any
1098 * will do for our purposes.
1099 */
1100
1101 status = acpi_walk_namespace(ACPI_TYPE_METHOD, vid_handle, 3,
1102 tpacpi_acpi_walk_find_bcl, NULL,
1103 &bcl_ptr);
1104
1105 if (ACPI_SUCCESS(status) && bcl_levels > 2) {
1106 tp_features.bright_acpimode = 1;
1107 return (bcl_levels - 2);
1108 }
1109
1110 return 0;
1111 }
1112
1113 static void printk_deprecated_attribute(const char * const what,
1114 const char * const details)
1115 {
1116 tpacpi_log_usertask("deprecated sysfs attribute");
1117 printk(TPACPI_WARN "WARNING: sysfs attribute %s is deprecated and "
1118 "will be removed. %s\n",
1119 what, details);
1120 }
1121
1122 /*************************************************************************
1123 * rfkill and radio control support helpers
1124 */
1125
1126 /*
1127 * ThinkPad-ACPI firmware handling model:
1128 *
1129 * WLSW (master wireless switch) is event-driven, and is common to all
1130 * firmware-controlled radios. It cannot be controlled, just monitored,
1131 * as expected. It overrides all radio state in firmware
1132 *
1133 * The kernel, a masked-off hotkey, and WLSW can change the radio state
1134 * (TODO: verify how WLSW interacts with the returned radio state).
1135 *
1136 * The only time there are shadow radio state changes, is when
1137 * masked-off hotkeys are used.
1138 */
1139
1140 /*
1141 * Internal driver API for radio state:
1142 *
1143 * int: < 0 = error, otherwise enum tpacpi_rfkill_state
1144 * bool: true means radio blocked (off)
1145 */
1146 enum tpacpi_rfkill_state {
1147 TPACPI_RFK_RADIO_OFF = 0,
1148 TPACPI_RFK_RADIO_ON
1149 };
1150
1151 /* rfkill switches */
1152 enum tpacpi_rfk_id {
1153 TPACPI_RFK_BLUETOOTH_SW_ID = 0,
1154 TPACPI_RFK_WWAN_SW_ID,
1155 TPACPI_RFK_UWB_SW_ID,
1156 TPACPI_RFK_SW_MAX
1157 };
1158
1159 static const char *tpacpi_rfkill_names[] = {
1160 [TPACPI_RFK_BLUETOOTH_SW_ID] = "bluetooth",
1161 [TPACPI_RFK_WWAN_SW_ID] = "wwan",
1162 [TPACPI_RFK_UWB_SW_ID] = "uwb",
1163 [TPACPI_RFK_SW_MAX] = NULL
1164 };
1165
1166 /* ThinkPad-ACPI rfkill subdriver */
1167 struct tpacpi_rfk {
1168 struct rfkill *rfkill;
1169 enum tpacpi_rfk_id id;
1170 const struct tpacpi_rfk_ops *ops;
1171 };
1172
1173 struct tpacpi_rfk_ops {
1174 /* firmware interface */
1175 int (*get_status)(void);
1176 int (*set_status)(const enum tpacpi_rfkill_state);
1177 };
1178
1179 static struct tpacpi_rfk *tpacpi_rfkill_switches[TPACPI_RFK_SW_MAX];
1180
1181 /* Query FW and update rfkill sw state for a given rfkill switch */
1182 static int tpacpi_rfk_update_swstate(const struct tpacpi_rfk *tp_rfk)
1183 {
1184 int status;
1185
1186 if (!tp_rfk)
1187 return -ENODEV;
1188
1189 status = (tp_rfk->ops->get_status)();
1190 if (status < 0)
1191 return status;
1192
1193 rfkill_set_sw_state(tp_rfk->rfkill,
1194 (status == TPACPI_RFK_RADIO_OFF));
1195
1196 return status;
1197 }
1198
1199 /* Query FW and update rfkill sw state for all rfkill switches */
1200 static void tpacpi_rfk_update_swstate_all(void)
1201 {
1202 unsigned int i;
1203
1204 for (i = 0; i < TPACPI_RFK_SW_MAX; i++)
1205 tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[i]);
1206 }
1207
1208 /*
1209 * Sync the HW-blocking state of all rfkill switches,
1210 * do notice it causes the rfkill core to schedule uevents
1211 */
1212 static void tpacpi_rfk_update_hwblock_state(bool blocked)
1213 {
1214 unsigned int i;
1215 struct tpacpi_rfk *tp_rfk;
1216
1217 for (i = 0; i < TPACPI_RFK_SW_MAX; i++) {
1218 tp_rfk = tpacpi_rfkill_switches[i];
1219 if (tp_rfk) {
1220 if (rfkill_set_hw_state(tp_rfk->rfkill,
1221 blocked)) {
1222 /* ignore -- we track sw block */
1223 }
1224 }
1225 }
1226 }
1227
1228 /* Call to get the WLSW state from the firmware */
1229 static int hotkey_get_wlsw(void);
1230
1231 /* Call to query WLSW state and update all rfkill switches */
1232 static bool tpacpi_rfk_check_hwblock_state(void)
1233 {
1234 int res = hotkey_get_wlsw();
1235 int hw_blocked;
1236
1237 /* When unknown or unsupported, we have to assume it is unblocked */
1238 if (res < 0)
1239 return false;
1240
1241 hw_blocked = (res == TPACPI_RFK_RADIO_OFF);
1242 tpacpi_rfk_update_hwblock_state(hw_blocked);
1243
1244 return hw_blocked;
1245 }
1246
1247 static int tpacpi_rfk_hook_set_block(void *data, bool blocked)
1248 {
1249 struct tpacpi_rfk *tp_rfk = data;
1250 int res;
1251
1252 dbg_printk(TPACPI_DBG_RFKILL,
1253 "request to change radio state to %s\n",
1254 blocked ? "blocked" : "unblocked");
1255
1256 /* try to set radio state */
1257 res = (tp_rfk->ops->set_status)(blocked ?
1258 TPACPI_RFK_RADIO_OFF : TPACPI_RFK_RADIO_ON);
1259
1260 /* and update the rfkill core with whatever the FW really did */
1261 tpacpi_rfk_update_swstate(tp_rfk);
1262
1263 return (res < 0) ? res : 0;
1264 }
1265
1266 static const struct rfkill_ops tpacpi_rfk_rfkill_ops = {
1267 .set_block = tpacpi_rfk_hook_set_block,
1268 };
1269
1270 static int __init tpacpi_new_rfkill(const enum tpacpi_rfk_id id,
1271 const struct tpacpi_rfk_ops *tp_rfkops,
1272 const enum rfkill_type rfktype,
1273 const char *name,
1274 const bool set_default)
1275 {
1276 struct tpacpi_rfk *atp_rfk;
1277 int res;
1278 bool sw_state = false;
1279 bool hw_state;
1280 int sw_status;
1281
1282 BUG_ON(id >= TPACPI_RFK_SW_MAX || tpacpi_rfkill_switches[id]);
1283
1284 atp_rfk = kzalloc(sizeof(struct tpacpi_rfk), GFP_KERNEL);
1285 if (atp_rfk)
1286 atp_rfk->rfkill = rfkill_alloc(name,
1287 &tpacpi_pdev->dev,
1288 rfktype,
1289 &tpacpi_rfk_rfkill_ops,
1290 atp_rfk);
1291 if (!atp_rfk || !atp_rfk->rfkill) {
1292 printk(TPACPI_ERR
1293 "failed to allocate memory for rfkill class\n");
1294 kfree(atp_rfk);
1295 return -ENOMEM;
1296 }
1297
1298 atp_rfk->id = id;
1299 atp_rfk->ops = tp_rfkops;
1300
1301 sw_status = (tp_rfkops->get_status)();
1302 if (sw_status < 0) {
1303 printk(TPACPI_ERR
1304 "failed to read initial state for %s, error %d\n",
1305 name, sw_status);
1306 } else {
1307 sw_state = (sw_status == TPACPI_RFK_RADIO_OFF);
1308 if (set_default) {
1309 /* try to keep the initial state, since we ask the
1310 * firmware to preserve it across S5 in NVRAM */
1311 rfkill_init_sw_state(atp_rfk->rfkill, sw_state);
1312 }
1313 }
1314 hw_state = tpacpi_rfk_check_hwblock_state();
1315 rfkill_set_hw_state(atp_rfk->rfkill, hw_state);
1316
1317 res = rfkill_register(atp_rfk->rfkill);
1318 if (res < 0) {
1319 printk(TPACPI_ERR
1320 "failed to register %s rfkill switch: %d\n",
1321 name, res);
1322 rfkill_destroy(atp_rfk->rfkill);
1323 kfree(atp_rfk);
1324 return res;
1325 }
1326
1327 tpacpi_rfkill_switches[id] = atp_rfk;
1328
1329 printk(TPACPI_INFO "rfkill switch %s: radio is %sblocked\n",
1330 name, (sw_state || hw_state) ? "" : "un");
1331 return 0;
1332 }
1333
1334 static void tpacpi_destroy_rfkill(const enum tpacpi_rfk_id id)
1335 {
1336 struct tpacpi_rfk *tp_rfk;
1337
1338 BUG_ON(id >= TPACPI_RFK_SW_MAX);
1339
1340 tp_rfk = tpacpi_rfkill_switches[id];
1341 if (tp_rfk) {
1342 rfkill_unregister(tp_rfk->rfkill);
1343 rfkill_destroy(tp_rfk->rfkill);
1344 tpacpi_rfkill_switches[id] = NULL;
1345 kfree(tp_rfk);
1346 }
1347 }
1348
1349 static void printk_deprecated_rfkill_attribute(const char * const what)
1350 {
1351 printk_deprecated_attribute(what,
1352 "Please switch to generic rfkill before year 2010");
1353 }
1354
1355 /* sysfs <radio> enable ------------------------------------------------ */
1356 static ssize_t tpacpi_rfk_sysfs_enable_show(const enum tpacpi_rfk_id id,
1357 struct device_attribute *attr,
1358 char *buf)
1359 {
1360 int status;
1361
1362 printk_deprecated_rfkill_attribute(attr->attr.name);
1363
1364 /* This is in the ABI... */
1365 if (tpacpi_rfk_check_hwblock_state()) {
1366 status = TPACPI_RFK_RADIO_OFF;
1367 } else {
1368 status = tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]);
1369 if (status < 0)
1370 return status;
1371 }
1372
1373 return snprintf(buf, PAGE_SIZE, "%d\n",
1374 (status == TPACPI_RFK_RADIO_ON) ? 1 : 0);
1375 }
1376
1377 static ssize_t tpacpi_rfk_sysfs_enable_store(const enum tpacpi_rfk_id id,
1378 struct device_attribute *attr,
1379 const char *buf, size_t count)
1380 {
1381 unsigned long t;
1382 int res;
1383
1384 printk_deprecated_rfkill_attribute(attr->attr.name);
1385
1386 if (parse_strtoul(buf, 1, &t))
1387 return -EINVAL;
1388
1389 tpacpi_disclose_usertask(attr->attr.name, "set to %ld\n", t);
1390
1391 /* This is in the ABI... */
1392 if (tpacpi_rfk_check_hwblock_state() && !!t)
1393 return -EPERM;
1394
1395 res = tpacpi_rfkill_switches[id]->ops->set_status((!!t) ?
1396 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF);
1397 tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]);
1398
1399 return (res < 0) ? res : count;
1400 }
1401
1402 /* procfs -------------------------------------------------------------- */
1403 static int tpacpi_rfk_procfs_read(const enum tpacpi_rfk_id id, struct seq_file *m)
1404 {
1405 if (id >= TPACPI_RFK_SW_MAX)
1406 seq_printf(m, "status:\t\tnot supported\n");
1407 else {
1408 int status;
1409
1410 /* This is in the ABI... */
1411 if (tpacpi_rfk_check_hwblock_state()) {
1412 status = TPACPI_RFK_RADIO_OFF;
1413 } else {
1414 status = tpacpi_rfk_update_swstate(
1415 tpacpi_rfkill_switches[id]);
1416 if (status < 0)
1417 return status;
1418 }
1419
1420 seq_printf(m, "status:\t\t%s\n",
1421 (status == TPACPI_RFK_RADIO_ON) ?
1422 "enabled" : "disabled");
1423 seq_printf(m, "commands:\tenable, disable\n");
1424 }
1425
1426 return 0;
1427 }
1428
1429 static int tpacpi_rfk_procfs_write(const enum tpacpi_rfk_id id, char *buf)
1430 {
1431 char *cmd;
1432 int status = -1;
1433 int res = 0;
1434
1435 if (id >= TPACPI_RFK_SW_MAX)
1436 return -ENODEV;
1437
1438 while ((cmd = next_cmd(&buf))) {
1439 if (strlencmp(cmd, "enable") == 0)
1440 status = TPACPI_RFK_RADIO_ON;
1441 else if (strlencmp(cmd, "disable") == 0)
1442 status = TPACPI_RFK_RADIO_OFF;
1443 else
1444 return -EINVAL;
1445 }
1446
1447 if (status != -1) {
1448 tpacpi_disclose_usertask("procfs", "attempt to %s %s\n",
1449 (status == TPACPI_RFK_RADIO_ON) ?
1450 "enable" : "disable",
1451 tpacpi_rfkill_names[id]);
1452 res = (tpacpi_rfkill_switches[id]->ops->set_status)(status);
1453 tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]);
1454 }
1455
1456 return res;
1457 }
1458
1459 /*************************************************************************
1460 * thinkpad-acpi driver attributes
1461 */
1462
1463 /* interface_version --------------------------------------------------- */
1464 static ssize_t tpacpi_driver_interface_version_show(
1465 struct device_driver *drv,
1466 char *buf)
1467 {
1468 return snprintf(buf, PAGE_SIZE, "0x%08x\n", TPACPI_SYSFS_VERSION);
1469 }
1470
1471 static DRIVER_ATTR(interface_version, S_IRUGO,
1472 tpacpi_driver_interface_version_show, NULL);
1473
1474 /* debug_level --------------------------------------------------------- */
1475 static ssize_t tpacpi_driver_debug_show(struct device_driver *drv,
1476 char *buf)
1477 {
1478 return snprintf(buf, PAGE_SIZE, "0x%04x\n", dbg_level);
1479 }
1480
1481 static ssize_t tpacpi_driver_debug_store(struct device_driver *drv,
1482 const char *buf, size_t count)
1483 {
1484 unsigned long t;
1485
1486 if (parse_strtoul(buf, 0xffff, &t))
1487 return -EINVAL;
1488
1489 dbg_level = t;
1490
1491 return count;
1492 }
1493
1494 static DRIVER_ATTR(debug_level, S_IWUSR | S_IRUGO,
1495 tpacpi_driver_debug_show, tpacpi_driver_debug_store);
1496
1497 /* version ------------------------------------------------------------- */
1498 static ssize_t tpacpi_driver_version_show(struct device_driver *drv,
1499 char *buf)
1500 {
1501 return snprintf(buf, PAGE_SIZE, "%s v%s\n",
1502 TPACPI_DESC, TPACPI_VERSION);
1503 }
1504
1505 static DRIVER_ATTR(version, S_IRUGO,
1506 tpacpi_driver_version_show, NULL);
1507
1508 /* --------------------------------------------------------------------- */
1509
1510 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
1511
1512 /* wlsw_emulstate ------------------------------------------------------ */
1513 static ssize_t tpacpi_driver_wlsw_emulstate_show(struct device_driver *drv,
1514 char *buf)
1515 {
1516 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_wlsw_emulstate);
1517 }
1518
1519 static ssize_t tpacpi_driver_wlsw_emulstate_store(struct device_driver *drv,
1520 const char *buf, size_t count)
1521 {
1522 unsigned long t;
1523
1524 if (parse_strtoul(buf, 1, &t))
1525 return -EINVAL;
1526
1527 if (tpacpi_wlsw_emulstate != !!t) {
1528 tpacpi_wlsw_emulstate = !!t;
1529 tpacpi_rfk_update_hwblock_state(!t); /* negative logic */
1530 }
1531
1532 return count;
1533 }
1534
1535 static DRIVER_ATTR(wlsw_emulstate, S_IWUSR | S_IRUGO,
1536 tpacpi_driver_wlsw_emulstate_show,
1537 tpacpi_driver_wlsw_emulstate_store);
1538
1539 /* bluetooth_emulstate ------------------------------------------------- */
1540 static ssize_t tpacpi_driver_bluetooth_emulstate_show(
1541 struct device_driver *drv,
1542 char *buf)
1543 {
1544 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_bluetooth_emulstate);
1545 }
1546
1547 static ssize_t tpacpi_driver_bluetooth_emulstate_store(
1548 struct device_driver *drv,
1549 const char *buf, size_t count)
1550 {
1551 unsigned long t;
1552
1553 if (parse_strtoul(buf, 1, &t))
1554 return -EINVAL;
1555
1556 tpacpi_bluetooth_emulstate = !!t;
1557
1558 return count;
1559 }
1560
1561 static DRIVER_ATTR(bluetooth_emulstate, S_IWUSR | S_IRUGO,
1562 tpacpi_driver_bluetooth_emulstate_show,
1563 tpacpi_driver_bluetooth_emulstate_store);
1564
1565 /* wwan_emulstate ------------------------------------------------- */
1566 static ssize_t tpacpi_driver_wwan_emulstate_show(
1567 struct device_driver *drv,
1568 char *buf)
1569 {
1570 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_wwan_emulstate);
1571 }
1572
1573 static ssize_t tpacpi_driver_wwan_emulstate_store(
1574 struct device_driver *drv,
1575 const char *buf, size_t count)
1576 {
1577 unsigned long t;
1578
1579 if (parse_strtoul(buf, 1, &t))
1580 return -EINVAL;
1581
1582 tpacpi_wwan_emulstate = !!t;
1583
1584 return count;
1585 }
1586
1587 static DRIVER_ATTR(wwan_emulstate, S_IWUSR | S_IRUGO,
1588 tpacpi_driver_wwan_emulstate_show,
1589 tpacpi_driver_wwan_emulstate_store);
1590
1591 /* uwb_emulstate ------------------------------------------------- */
1592 static ssize_t tpacpi_driver_uwb_emulstate_show(
1593 struct device_driver *drv,
1594 char *buf)
1595 {
1596 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_uwb_emulstate);
1597 }
1598
1599 static ssize_t tpacpi_driver_uwb_emulstate_store(
1600 struct device_driver *drv,
1601 const char *buf, size_t count)
1602 {
1603 unsigned long t;
1604
1605 if (parse_strtoul(buf, 1, &t))
1606 return -EINVAL;
1607
1608 tpacpi_uwb_emulstate = !!t;
1609
1610 return count;
1611 }
1612
1613 static DRIVER_ATTR(uwb_emulstate, S_IWUSR | S_IRUGO,
1614 tpacpi_driver_uwb_emulstate_show,
1615 tpacpi_driver_uwb_emulstate_store);
1616 #endif
1617
1618 /* --------------------------------------------------------------------- */
1619
1620 static struct driver_attribute *tpacpi_driver_attributes[] = {
1621 &driver_attr_debug_level, &driver_attr_version,
1622 &driver_attr_interface_version,
1623 };
1624
1625 static int __init tpacpi_create_driver_attributes(struct device_driver *drv)
1626 {
1627 int i, res;
1628
1629 i = 0;
1630 res = 0;
1631 while (!res && i < ARRAY_SIZE(tpacpi_driver_attributes)) {
1632 res = driver_create_file(drv, tpacpi_driver_attributes[i]);
1633 i++;
1634 }
1635
1636 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
1637 if (!res && dbg_wlswemul)
1638 res = driver_create_file(drv, &driver_attr_wlsw_emulstate);
1639 if (!res && dbg_bluetoothemul)
1640 res = driver_create_file(drv, &driver_attr_bluetooth_emulstate);
1641 if (!res && dbg_wwanemul)
1642 res = driver_create_file(drv, &driver_attr_wwan_emulstate);
1643 if (!res && dbg_uwbemul)
1644 res = driver_create_file(drv, &driver_attr_uwb_emulstate);
1645 #endif
1646
1647 return res;
1648 }
1649
1650 static void tpacpi_remove_driver_attributes(struct device_driver *drv)
1651 {
1652 int i;
1653
1654 for (i = 0; i < ARRAY_SIZE(tpacpi_driver_attributes); i++)
1655 driver_remove_file(drv, tpacpi_driver_attributes[i]);
1656
1657 #ifdef THINKPAD_ACPI_DEBUGFACILITIES
1658 driver_remove_file(drv, &driver_attr_wlsw_emulstate);
1659 driver_remove_file(drv, &driver_attr_bluetooth_emulstate);
1660 driver_remove_file(drv, &driver_attr_wwan_emulstate);
1661 driver_remove_file(drv, &driver_attr_uwb_emulstate);
1662 #endif
1663 }
1664
1665 /*************************************************************************
1666 * Firmware Data
1667 */
1668
1669 /*
1670 * Table of recommended minimum BIOS versions
1671 *
1672 * Reasons for listing:
1673 * 1. Stable BIOS, listed because the unknown ammount of
1674 * bugs and bad ACPI behaviour on older versions
1675 *
1676 * 2. BIOS or EC fw with known bugs that trigger on Linux
1677 *
1678 * 3. BIOS with known reduced functionality in older versions
1679 *
1680 * We recommend the latest BIOS and EC version.
1681 * We only support the latest BIOS and EC fw version as a rule.
1682 *
1683 * Sources: IBM ThinkPad Public Web Documents (update changelogs),
1684 * Information from users in ThinkWiki
1685 *
1686 * WARNING: we use this table also to detect that the machine is
1687 * a ThinkPad in some cases, so don't remove entries lightly.
1688 */
1689
1690 #define TPV_Q(__v, __id1, __id2, __bv1, __bv2) \
1691 { .vendor = (__v), \
1692 .bios = TPID(__id1, __id2), \
1693 .ec = TPACPI_MATCH_ANY, \
1694 .quirks = TPACPI_MATCH_ANY << 16 \
1695 | (__bv1) << 8 | (__bv2) }
1696
1697 #define TPV_Q_X(__v, __bid1, __bid2, __bv1, __bv2, \
1698 __eid, __ev1, __ev2) \
1699 { .vendor = (__v), \
1700 .bios = TPID(__bid1, __bid2), \
1701 .ec = __eid, \
1702 .quirks = (__ev1) << 24 | (__ev2) << 16 \
1703 | (__bv1) << 8 | (__bv2) }
1704
1705 #define TPV_QI0(__id1, __id2, __bv1, __bv2) \
1706 TPV_Q(PCI_VENDOR_ID_IBM, __id1, __id2, __bv1, __bv2)
1707
1708 /* Outdated IBM BIOSes often lack the EC id string */
1709 #define TPV_QI1(__id1, __id2, __bv1, __bv2, __ev1, __ev2) \
1710 TPV_Q_X(PCI_VENDOR_ID_IBM, __id1, __id2, \
1711 __bv1, __bv2, TPID(__id1, __id2), \
1712 __ev1, __ev2), \
1713 TPV_Q_X(PCI_VENDOR_ID_IBM, __id1, __id2, \
1714 __bv1, __bv2, TPACPI_MATCH_UNKNOWN, \
1715 __ev1, __ev2)
1716
1717 /* Outdated IBM BIOSes often lack the EC id string */
1718 #define TPV_QI2(__bid1, __bid2, __bv1, __bv2, \
1719 __eid1, __eid2, __ev1, __ev2) \
1720 TPV_Q_X(PCI_VENDOR_ID_IBM, __bid1, __bid2, \
1721 __bv1, __bv2, TPID(__eid1, __eid2), \
1722 __ev1, __ev2), \
1723 TPV_Q_X(PCI_VENDOR_ID_IBM, __bid1, __bid2, \
1724 __bv1, __bv2, TPACPI_MATCH_UNKNOWN, \
1725 __ev1, __ev2)
1726
1727 #define TPV_QL0(__id1, __id2, __bv1, __bv2) \
1728 TPV_Q(PCI_VENDOR_ID_LENOVO, __id1, __id2, __bv1, __bv2)
1729
1730 #define TPV_QL1(__id1, __id2, __bv1, __bv2, __ev1, __ev2) \
1731 TPV_Q_X(PCI_VENDOR_ID_LENOVO, __id1, __id2, \
1732 __bv1, __bv2, TPID(__id1, __id2), \
1733 __ev1, __ev2)
1734
1735 #define TPV_QL2(__bid1, __bid2, __bv1, __bv2, \
1736 __eid1, __eid2, __ev1, __ev2) \
1737 TPV_Q_X(PCI_VENDOR_ID_LENOVO, __bid1, __bid2, \
1738 __bv1, __bv2, TPID(__eid1, __eid2), \
1739 __ev1, __ev2)
1740
1741 static const struct tpacpi_quirk tpacpi_bios_version_qtable[] __initconst = {
1742 /* Numeric models ------------------ */
1743 /* FW MODEL BIOS VERS */
1744 TPV_QI0('I', 'M', '6', '5'), /* 570 */
1745 TPV_QI0('I', 'U', '2', '6'), /* 570E */
1746 TPV_QI0('I', 'B', '5', '4'), /* 600 */
1747 TPV_QI0('I', 'H', '4', '7'), /* 600E */
1748 TPV_QI0('I', 'N', '3', '6'), /* 600E */
1749 TPV_QI0('I', 'T', '5', '5'), /* 600X */
1750 TPV_QI0('I', 'D', '4', '8'), /* 770, 770E, 770ED */
1751 TPV_QI0('I', 'I', '4', '2'), /* 770X */
1752 TPV_QI0('I', 'O', '2', '3'), /* 770Z */
1753
1754 /* A-series ------------------------- */
1755 /* FW MODEL BIOS VERS EC VERS */
1756 TPV_QI0('I', 'W', '5', '9'), /* A20m */
1757 TPV_QI0('I', 'V', '6', '9'), /* A20p */
1758 TPV_QI0('1', '0', '2', '6'), /* A21e, A22e */
1759 TPV_QI0('K', 'U', '3', '6'), /* A21e */
1760 TPV_QI0('K', 'X', '3', '6'), /* A21m, A22m */
1761 TPV_QI0('K', 'Y', '3', '8'), /* A21p, A22p */
1762 TPV_QI0('1', 'B', '1', '7'), /* A22e */
1763 TPV_QI0('1', '3', '2', '0'), /* A22m */
1764 TPV_QI0('1', 'E', '7', '3'), /* A30/p (0) */
1765 TPV_QI1('1', 'G', '4', '1', '1', '7'), /* A31/p (0) */
1766 TPV_QI1('1', 'N', '1', '6', '0', '7'), /* A31/p (0) */
1767
1768 /* G-series ------------------------- */
1769 /* FW MODEL BIOS VERS */
1770 TPV_QI0('1', 'T', 'A', '6'), /* G40 */
1771 TPV_QI0('1', 'X', '5', '7'), /* G41 */
1772
1773 /* R-series, T-series --------------- */
1774 /* FW MODEL BIOS VERS EC VERS */
1775 TPV_QI0('1', 'C', 'F', '0'), /* R30 */
1776 TPV_QI0('1', 'F', 'F', '1'), /* R31 */
1777 TPV_QI0('1', 'M', '9', '7'), /* R32 */
1778 TPV_QI0('1', 'O', '6', '1'), /* R40 */
1779 TPV_QI0('1', 'P', '6', '5'), /* R40 */
1780 TPV_QI0('1', 'S', '7', '0'), /* R40e */
1781 TPV_QI1('1', 'R', 'D', 'R', '7', '1'), /* R50/p, R51,
1782 T40/p, T41/p, T42/p (1) */
1783 TPV_QI1('1', 'V', '7', '1', '2', '8'), /* R50e, R51 (1) */
1784 TPV_QI1('7', '8', '7', '1', '0', '6'), /* R51e (1) */
1785 TPV_QI1('7', '6', '6', '9', '1', '6'), /* R52 (1) */
1786 TPV_QI1('7', '0', '6', '9', '2', '8'), /* R52, T43 (1) */
1787
1788 TPV_QI0('I', 'Y', '6', '1'), /* T20 */
1789 TPV_QI0('K', 'Z', '3', '4'), /* T21 */
1790 TPV_QI0('1', '6', '3', '2'), /* T22 */
1791 TPV_QI1('1', 'A', '6', '4', '2', '3'), /* T23 (0) */
1792 TPV_QI1('1', 'I', '7', '1', '2', '0'), /* T30 (0) */
1793 TPV_QI1('1', 'Y', '6', '5', '2', '9'), /* T43/p (1) */
1794
1795 TPV_QL1('7', '9', 'E', '3', '5', '0'), /* T60/p */
1796 TPV_QL1('7', 'C', 'D', '2', '2', '2'), /* R60, R60i */
1797 TPV_QL1('7', 'E', 'D', '0', '1', '5'), /* R60e, R60i */
1798
1799 /* BIOS FW BIOS VERS EC FW EC VERS */
1800 TPV_QI2('1', 'W', '9', '0', '1', 'V', '2', '8'), /* R50e (1) */
1801 TPV_QL2('7', 'I', '3', '4', '7', '9', '5', '0'), /* T60/p wide */
1802
1803 /* X-series ------------------------- */
1804 /* FW MODEL BIOS VERS EC VERS */
1805 TPV_QI0('I', 'Z', '9', 'D'), /* X20, X21 */
1806 TPV_QI0('1', 'D', '7', '0'), /* X22, X23, X24 */
1807 TPV_QI1('1', 'K', '4', '8', '1', '8'), /* X30 (0) */
1808 TPV_QI1('1', 'Q', '9', '7', '2', '3'), /* X31, X32 (0) */
1809 TPV_QI1('1', 'U', 'D', '3', 'B', '2'), /* X40 (0) */
1810 TPV_QI1('7', '4', '6', '4', '2', '7'), /* X41 (0) */
1811 TPV_QI1('7', '5', '6', '0', '2', '0'), /* X41t (0) */
1812
1813 TPV_QL1('7', 'B', 'D', '7', '4', '0'), /* X60/s */
1814 TPV_QL1('7', 'J', '3', '0', '1', '3'), /* X60t */
1815
1816 /* (0) - older versions lack DMI EC fw string and functionality */
1817 /* (1) - older versions known to lack functionality */
1818 };
1819
1820 #undef TPV_QL1
1821 #undef TPV_QL0
1822 #undef TPV_QI2
1823 #undef TPV_QI1
1824 #undef TPV_QI0
1825 #undef TPV_Q_X
1826 #undef TPV_Q
1827
1828 static void __init tpacpi_check_outdated_fw(void)
1829 {
1830 unsigned long fwvers;
1831 u16 ec_version, bios_version;
1832
1833 fwvers = tpacpi_check_quirks(tpacpi_bios_version_qtable,
1834 ARRAY_SIZE(tpacpi_bios_version_qtable));
1835
1836 if (!fwvers)
1837 return;
1838
1839 bios_version = fwvers & 0xffffU;
1840 ec_version = (fwvers >> 16) & 0xffffU;
1841
1842 /* note that unknown versions are set to 0x0000 and we use that */
1843 if ((bios_version > thinkpad_id.bios_release) ||
1844 (ec_version > thinkpad_id.ec_release &&
1845 ec_version != TPACPI_MATCH_ANY)) {
1846 /*
1847 * The changelogs would let us track down the exact
1848 * reason, but it is just too much of a pain to track
1849 * it. We only list BIOSes that are either really
1850 * broken, or really stable to begin with, so it is
1851 * best if the user upgrades the firmware anyway.
1852 */
1853 printk(TPACPI_WARN
1854 "WARNING: Outdated ThinkPad BIOS/EC firmware\n");
1855 printk(TPACPI_WARN
1856 "WARNING: This firmware may be missing critical bug "
1857 "fixes and/or important features\n");
1858 }
1859 }
1860
1861 static bool __init tpacpi_is_fw_known(void)
1862 {
1863 return tpacpi_check_quirks(tpacpi_bios_version_qtable,
1864 ARRAY_SIZE(tpacpi_bios_version_qtable)) != 0;
1865 }
1866
1867 /****************************************************************************
1868 ****************************************************************************
1869 *
1870 * Subdrivers
1871 *
1872 ****************************************************************************
1873 ****************************************************************************/
1874
1875 /*************************************************************************
1876 * thinkpad-acpi init subdriver
1877 */
1878
1879 static int __init thinkpad_acpi_driver_init(struct ibm_init_struct *iibm)
1880 {
1881 printk(TPACPI_INFO "%s v%s\n", TPACPI_DESC, TPACPI_VERSION);
1882 printk(TPACPI_INFO "%s\n", TPACPI_URL);
1883
1884 printk(TPACPI_INFO "ThinkPad BIOS %s, EC %s\n",
1885 (thinkpad_id.bios_version_str) ?
1886 thinkpad_id.bios_version_str : "unknown",
1887 (thinkpad_id.ec_version_str) ?
1888 thinkpad_id.ec_version_str : "unknown");
1889
1890 if (thinkpad_id.vendor && thinkpad_id.model_str)
1891 printk(TPACPI_INFO "%s %s, model %s\n",
1892 (thinkpad_id.vendor == PCI_VENDOR_ID_IBM) ?
1893 "IBM" : ((thinkpad_id.vendor ==
1894 PCI_VENDOR_ID_LENOVO) ?
1895 "Lenovo" : "Unknown vendor"),
1896 thinkpad_id.model_str,
1897 (thinkpad_id.nummodel_str) ?
1898 thinkpad_id.nummodel_str : "unknown");
1899
1900 tpacpi_check_outdated_fw();
1901 return 0;
1902 }
1903
1904 static int thinkpad_acpi_driver_read(struct seq_file *m)
1905 {
1906 seq_printf(m, "driver:\t\t%s\n", TPACPI_DESC);
1907 seq_printf(m, "version:\t%s\n", TPACPI_VERSION);
1908 return 0;
1909 }
1910
1911 static struct ibm_struct thinkpad_acpi_driver_data = {
1912 .name = "driver",
1913 .read = thinkpad_acpi_driver_read,
1914 };
1915
1916 /*************************************************************************
1917 * Hotkey subdriver
1918 */
1919
1920 /*
1921 * ThinkPad firmware event model
1922 *
1923 * The ThinkPad firmware has two main event interfaces: normal ACPI
1924 * notifications (which follow the ACPI standard), and a private event
1925 * interface.
1926 *
1927 * The private event interface also issues events for the hotkeys. As
1928 * the driver gained features, the event handling code ended up being
1929 * built around the hotkey subdriver. This will need to be refactored
1930 * to a more formal event API eventually.
1931 *
1932 * Some "hotkeys" are actually supposed to be used as event reports,
1933 * such as "brightness has changed", "volume has changed", depending on
1934 * the ThinkPad model and how the firmware is operating.
1935 *
1936 * Unlike other classes, hotkey-class events have mask/unmask control on
1937 * non-ancient firmware. However, how it behaves changes a lot with the
1938 * firmware model and version.
1939 */
1940
1941 enum { /* hot key scan codes (derived from ACPI DSDT) */
1942 TP_ACPI_HOTKEYSCAN_FNF1 = 0,
1943 TP_ACPI_HOTKEYSCAN_FNF2,
1944 TP_ACPI_HOTKEYSCAN_FNF3,
1945 TP_ACPI_HOTKEYSCAN_FNF4,
1946 TP_ACPI_HOTKEYSCAN_FNF5,
1947 TP_ACPI_HOTKEYSCAN_FNF6,
1948 TP_ACPI_HOTKEYSCAN_FNF7,
1949 TP_ACPI_HOTKEYSCAN_FNF8,
1950 TP_ACPI_HOTKEYSCAN_FNF9,
1951 TP_ACPI_HOTKEYSCAN_FNF10,
1952 TP_ACPI_HOTKEYSCAN_FNF11,
1953 TP_ACPI_HOTKEYSCAN_FNF12,
1954 TP_ACPI_HOTKEYSCAN_FNBACKSPACE,
1955 TP_ACPI_HOTKEYSCAN_FNINSERT,
1956 TP_ACPI_HOTKEYSCAN_FNDELETE,
1957 TP_ACPI_HOTKEYSCAN_FNHOME,
1958 TP_ACPI_HOTKEYSCAN_FNEND,
1959 TP_ACPI_HOTKEYSCAN_FNPAGEUP,
1960 TP_ACPI_HOTKEYSCAN_FNPAGEDOWN,
1961 TP_ACPI_HOTKEYSCAN_FNSPACE,
1962 TP_ACPI_HOTKEYSCAN_VOLUMEUP,
1963 TP_ACPI_HOTKEYSCAN_VOLUMEDOWN,
1964 TP_ACPI_HOTKEYSCAN_MUTE,
1965 TP_ACPI_HOTKEYSCAN_THINKPAD,
1966 };
1967
1968 enum { /* Keys/events available through NVRAM polling */
1969 TPACPI_HKEY_NVRAM_KNOWN_MASK = 0x00fb88c0U,
1970 TPACPI_HKEY_NVRAM_GOOD_MASK = 0x00fb8000U,
1971 };
1972
1973 enum { /* Positions of some of the keys in hotkey masks */
1974 TP_ACPI_HKEY_DISPSWTCH_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF7,
1975 TP_ACPI_HKEY_DISPXPAND_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF8,
1976 TP_ACPI_HKEY_HIBERNATE_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF12,
1977 TP_ACPI_HKEY_BRGHTUP_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNHOME,
1978 TP_ACPI_HKEY_BRGHTDWN_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNEND,
1979 TP_ACPI_HKEY_THNKLGHT_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNPAGEUP,
1980 TP_ACPI_HKEY_ZOOM_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNSPACE,
1981 TP_ACPI_HKEY_VOLUP_MASK = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEUP,
1982 TP_ACPI_HKEY_VOLDWN_MASK = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEDOWN,
1983 TP_ACPI_HKEY_MUTE_MASK = 1 << TP_ACPI_HOTKEYSCAN_MUTE,
1984 TP_ACPI_HKEY_THINKPAD_MASK = 1 << TP_ACPI_HOTKEYSCAN_THINKPAD,
1985 };
1986
1987 enum { /* NVRAM to ACPI HKEY group map */
1988 TP_NVRAM_HKEY_GROUP_HK2 = TP_ACPI_HKEY_THINKPAD_MASK |
1989 TP_ACPI_HKEY_ZOOM_MASK |
1990 TP_ACPI_HKEY_DISPSWTCH_MASK |
1991 TP_ACPI_HKEY_HIBERNATE_MASK,
1992 TP_NVRAM_HKEY_GROUP_BRIGHTNESS = TP_ACPI_HKEY_BRGHTUP_MASK |
1993 TP_ACPI_HKEY_BRGHTDWN_MASK,
1994 TP_NVRAM_HKEY_GROUP_VOLUME = TP_ACPI_HKEY_VOLUP_MASK |
1995 TP_ACPI_HKEY_VOLDWN_MASK |
1996 TP_ACPI_HKEY_MUTE_MASK,
1997 };
1998
1999 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2000 struct tp_nvram_state {
2001 u16 thinkpad_toggle:1;
2002 u16 zoom_toggle:1;
2003 u16 display_toggle:1;
2004 u16 thinklight_toggle:1;
2005 u16 hibernate_toggle:1;
2006 u16 displayexp_toggle:1;
2007 u16 display_state:1;
2008 u16 brightness_toggle:1;
2009 u16 volume_toggle:1;
2010 u16 mute:1;
2011
2012 u8 brightness_level;
2013 u8 volume_level;
2014 };
2015
2016 /* kthread for the hotkey poller */
2017 static struct task_struct *tpacpi_hotkey_task;
2018
2019 /* Acquired while the poller kthread is running, use to sync start/stop */
2020 static struct mutex hotkey_thread_mutex;
2021
2022 /*
2023 * Acquire mutex to write poller control variables as an
2024 * atomic block.
2025 *
2026 * Increment hotkey_config_change when changing them if you
2027 * want the kthread to forget old state.
2028 *
2029 * See HOTKEY_CONFIG_CRITICAL_START/HOTKEY_CONFIG_CRITICAL_END
2030 */
2031 static struct mutex hotkey_thread_data_mutex;
2032 static unsigned int hotkey_config_change;
2033
2034 /*
2035 * hotkey poller control variables
2036 *
2037 * Must be atomic or readers will also need to acquire mutex
2038 *
2039 * HOTKEY_CONFIG_CRITICAL_START/HOTKEY_CONFIG_CRITICAL_END
2040 * should be used only when the changes need to be taken as
2041 * a block, OR when one needs to force the kthread to forget
2042 * old state.
2043 */
2044 static u32 hotkey_source_mask; /* bit mask 0=ACPI,1=NVRAM */
2045 static unsigned int hotkey_poll_freq = 10; /* Hz */
2046
2047 #define HOTKEY_CONFIG_CRITICAL_START \
2048 do { \
2049 mutex_lock(&hotkey_thread_data_mutex); \
2050 hotkey_config_change++; \
2051 } while (0);
2052 #define HOTKEY_CONFIG_CRITICAL_END \
2053 mutex_unlock(&hotkey_thread_data_mutex);
2054
2055 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2056
2057 #define hotkey_source_mask 0U
2058 #define HOTKEY_CONFIG_CRITICAL_START
2059 #define HOTKEY_CONFIG_CRITICAL_END
2060
2061 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2062
2063 static struct mutex hotkey_mutex;
2064
2065 static enum { /* Reasons for waking up */
2066 TP_ACPI_WAKEUP_NONE = 0, /* None or unknown */
2067 TP_ACPI_WAKEUP_BAYEJ, /* Bay ejection request */
2068 TP_ACPI_WAKEUP_UNDOCK, /* Undock request */
2069 } hotkey_wakeup_reason;
2070
2071 static int hotkey_autosleep_ack;
2072
2073 static u32 hotkey_orig_mask; /* events the BIOS had enabled */
2074 static u32 hotkey_all_mask; /* all events supported in fw */
2075 static u32 hotkey_reserved_mask; /* events better left disabled */
2076 static u32 hotkey_driver_mask; /* events needed by the driver */
2077 static u32 hotkey_user_mask; /* events visible to userspace */
2078 static u32 hotkey_acpi_mask; /* events enabled in firmware */
2079
2080 static unsigned int hotkey_report_mode;
2081
2082 static u16 *hotkey_keycode_map;
2083
2084 static struct attribute_set *hotkey_dev_attributes;
2085
2086 static void tpacpi_driver_event(const unsigned int hkey_event);
2087 static void hotkey_driver_event(const unsigned int scancode);
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 mutex_unlock(&hotkey_mutex);
2271
2272 return rc;
2273 }
2274
2275 static int hotkey_status_get(int *status)
2276 {
2277 if (!acpi_evalf(hkey_handle, status, "DHKC", "d"))
2278 return -EIO;
2279
2280 return 0;
2281 }
2282
2283 static int hotkey_status_set(bool enable)
2284 {
2285 if (!acpi_evalf(hkey_handle, NULL, "MHKC", "vd", enable ? 1 : 0))
2286 return -EIO;
2287
2288 return 0;
2289 }
2290
2291 static void tpacpi_input_send_tabletsw(void)
2292 {
2293 int state;
2294
2295 if (tp_features.hotkey_tablet &&
2296 !hotkey_get_tablet_mode(&state)) {
2297 mutex_lock(&tpacpi_inputdev_send_mutex);
2298
2299 input_report_switch(tpacpi_inputdev,
2300 SW_TABLET_MODE, !!state);
2301 input_sync(tpacpi_inputdev);
2302
2303 mutex_unlock(&tpacpi_inputdev_send_mutex);
2304 }
2305 }
2306
2307 /* Do NOT call without validating scancode first */
2308 static void tpacpi_input_send_key(const unsigned int scancode)
2309 {
2310 const unsigned int keycode = hotkey_keycode_map[scancode];
2311
2312 if (keycode != KEY_RESERVED) {
2313 mutex_lock(&tpacpi_inputdev_send_mutex);
2314
2315 input_report_key(tpacpi_inputdev, keycode, 1);
2316 if (keycode == KEY_UNKNOWN)
2317 input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN,
2318 scancode);
2319 input_sync(tpacpi_inputdev);
2320
2321 input_report_key(tpacpi_inputdev, keycode, 0);
2322 if (keycode == KEY_UNKNOWN)
2323 input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN,
2324 scancode);
2325 input_sync(tpacpi_inputdev);
2326
2327 mutex_unlock(&tpacpi_inputdev_send_mutex);
2328 }
2329 }
2330
2331 /* Do NOT call without validating scancode first */
2332 static void tpacpi_input_send_key_masked(const unsigned int scancode)
2333 {
2334 hotkey_driver_event(scancode);
2335 if (hotkey_user_mask & (1 << scancode))
2336 tpacpi_input_send_key(scancode);
2337 }
2338
2339 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2340 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver;
2341
2342 /* Do NOT call without validating scancode first */
2343 static void tpacpi_hotkey_send_key(unsigned int scancode)
2344 {
2345 tpacpi_input_send_key_masked(scancode);
2346 if (hotkey_report_mode < 2) {
2347 acpi_bus_generate_proc_event(ibm_hotkey_acpidriver.device,
2348 0x80, TP_HKEY_EV_HOTKEY_BASE + scancode);
2349 }
2350 }
2351
2352 static void hotkey_read_nvram(struct tp_nvram_state *n, const u32 m)
2353 {
2354 u8 d;
2355
2356 if (m & TP_NVRAM_HKEY_GROUP_HK2) {
2357 d = nvram_read_byte(TP_NVRAM_ADDR_HK2);
2358 n->thinkpad_toggle = !!(d & TP_NVRAM_MASK_HKT_THINKPAD);
2359 n->zoom_toggle = !!(d & TP_NVRAM_MASK_HKT_ZOOM);
2360 n->display_toggle = !!(d & TP_NVRAM_MASK_HKT_DISPLAY);
2361 n->hibernate_toggle = !!(d & TP_NVRAM_MASK_HKT_HIBERNATE);
2362 }
2363 if (m & TP_ACPI_HKEY_THNKLGHT_MASK) {
2364 d = nvram_read_byte(TP_NVRAM_ADDR_THINKLIGHT);
2365 n->thinklight_toggle = !!(d & TP_NVRAM_MASK_THINKLIGHT);
2366 }
2367 if (m & TP_ACPI_HKEY_DISPXPAND_MASK) {
2368 d = nvram_read_byte(TP_NVRAM_ADDR_VIDEO);
2369 n->displayexp_toggle =
2370 !!(d & TP_NVRAM_MASK_HKT_DISPEXPND);
2371 }
2372 if (m & TP_NVRAM_HKEY_GROUP_BRIGHTNESS) {
2373 d = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS);
2374 n->brightness_level = (d & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
2375 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
2376 n->brightness_toggle =
2377 !!(d & TP_NVRAM_MASK_HKT_BRIGHTNESS);
2378 }
2379 if (m & TP_NVRAM_HKEY_GROUP_VOLUME) {
2380 d = nvram_read_byte(TP_NVRAM_ADDR_MIXER);
2381 n->volume_level = (d & TP_NVRAM_MASK_LEVEL_VOLUME)
2382 >> TP_NVRAM_POS_LEVEL_VOLUME;
2383 n->mute = !!(d & TP_NVRAM_MASK_MUTE);
2384 n->volume_toggle = !!(d & TP_NVRAM_MASK_HKT_VOLUME);
2385 }
2386 }
2387
2388 static void hotkey_compare_and_issue_event(struct tp_nvram_state *oldn,
2389 struct tp_nvram_state *newn,
2390 const u32 event_mask)
2391 {
2392
2393 #define TPACPI_COMPARE_KEY(__scancode, __member) \
2394 do { \
2395 if ((event_mask & (1 << __scancode)) && \
2396 oldn->__member != newn->__member) \
2397 tpacpi_hotkey_send_key(__scancode); \
2398 } while (0)
2399
2400 #define TPACPI_MAY_SEND_KEY(__scancode) \
2401 do { \
2402 if (event_mask & (1 << __scancode)) \
2403 tpacpi_hotkey_send_key(__scancode); \
2404 } while (0)
2405
2406 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_THINKPAD, thinkpad_toggle);
2407 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNSPACE, zoom_toggle);
2408 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF7, display_toggle);
2409 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF12, hibernate_toggle);
2410
2411 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNPAGEUP, thinklight_toggle);
2412
2413 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF8, displayexp_toggle);
2414
2415 /* handle volume */
2416 if (oldn->volume_toggle != newn->volume_toggle) {
2417 if (oldn->mute != newn->mute) {
2418 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE);
2419 }
2420 if (oldn->volume_level > newn->volume_level) {
2421 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
2422 } else if (oldn->volume_level < newn->volume_level) {
2423 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
2424 } else if (oldn->mute == newn->mute) {
2425 /* repeated key presses that didn't change state */
2426 if (newn->mute) {
2427 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE);
2428 } else if (newn->volume_level != 0) {
2429 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
2430 } else {
2431 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
2432 }
2433 }
2434 }
2435
2436 /* handle brightness */
2437 if (oldn->brightness_toggle != newn->brightness_toggle) {
2438 if (oldn->brightness_level < newn->brightness_level) {
2439 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
2440 } else if (oldn->brightness_level > newn->brightness_level) {
2441 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
2442 } else {
2443 /* repeated key presses that didn't change state */
2444 if (newn->brightness_level != 0) {
2445 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
2446 } else {
2447 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
2448 }
2449 }
2450 }
2451
2452 #undef TPACPI_COMPARE_KEY
2453 #undef TPACPI_MAY_SEND_KEY
2454 }
2455
2456 /*
2457 * Polling driver
2458 *
2459 * We track all events in hotkey_source_mask all the time, since
2460 * most of them are edge-based. We only issue those requested by
2461 * hotkey_user_mask or hotkey_driver_mask, though.
2462 */
2463 static int hotkey_kthread(void *data)
2464 {
2465 struct tp_nvram_state s[2];
2466 u32 poll_mask, event_mask;
2467 unsigned int si, so;
2468 unsigned long t;
2469 unsigned int change_detector, must_reset;
2470 unsigned int poll_freq;
2471
2472 mutex_lock(&hotkey_thread_mutex);
2473
2474 if (tpacpi_lifecycle == TPACPI_LIFE_EXITING)
2475 goto exit;
2476
2477 set_freezable();
2478
2479 so = 0;
2480 si = 1;
2481 t = 0;
2482
2483 /* Initial state for compares */
2484 mutex_lock(&hotkey_thread_data_mutex);
2485 change_detector = hotkey_config_change;
2486 poll_mask = hotkey_source_mask;
2487 event_mask = hotkey_source_mask &
2488 (hotkey_driver_mask | hotkey_user_mask);
2489 poll_freq = hotkey_poll_freq;
2490 mutex_unlock(&hotkey_thread_data_mutex);
2491 hotkey_read_nvram(&s[so], poll_mask);
2492
2493 while (!kthread_should_stop()) {
2494 if (t == 0) {
2495 if (likely(poll_freq))
2496 t = 1000/poll_freq;
2497 else
2498 t = 100; /* should never happen... */
2499 }
2500 t = msleep_interruptible(t);
2501 if (unlikely(kthread_should_stop()))
2502 break;
2503 must_reset = try_to_freeze();
2504 if (t > 0 && !must_reset)
2505 continue;
2506
2507 mutex_lock(&hotkey_thread_data_mutex);
2508 if (must_reset || hotkey_config_change != change_detector) {
2509 /* forget old state on thaw or config change */
2510 si = so;
2511 t = 0;
2512 change_detector = hotkey_config_change;
2513 }
2514 poll_mask = hotkey_source_mask;
2515 event_mask = hotkey_source_mask &
2516 (hotkey_driver_mask | hotkey_user_mask);
2517 poll_freq = hotkey_poll_freq;
2518 mutex_unlock(&hotkey_thread_data_mutex);
2519
2520 if (likely(poll_mask)) {
2521 hotkey_read_nvram(&s[si], poll_mask);
2522 if (likely(si != so)) {
2523 hotkey_compare_and_issue_event(&s[so], &s[si],
2524 event_mask);
2525 }
2526 }
2527
2528 so = si;
2529 si ^= 1;
2530 }
2531
2532 exit:
2533 mutex_unlock(&hotkey_thread_mutex);
2534 return 0;
2535 }
2536
2537 /* call with hotkey_mutex held */
2538 static void hotkey_poll_stop_sync(void)
2539 {
2540 if (tpacpi_hotkey_task) {
2541 if (frozen(tpacpi_hotkey_task) ||
2542 freezing(tpacpi_hotkey_task))
2543 thaw_process(tpacpi_hotkey_task);
2544
2545 kthread_stop(tpacpi_hotkey_task);
2546 tpacpi_hotkey_task = NULL;
2547 mutex_lock(&hotkey_thread_mutex);
2548 /* at this point, the thread did exit */
2549 mutex_unlock(&hotkey_thread_mutex);
2550 }
2551 }
2552
2553 /* call with hotkey_mutex held */
2554 static void hotkey_poll_setup(bool may_warn)
2555 {
2556 const u32 poll_driver_mask = hotkey_driver_mask & hotkey_source_mask;
2557 const u32 poll_user_mask = hotkey_user_mask & hotkey_source_mask;
2558
2559 if (hotkey_poll_freq > 0 &&
2560 (poll_driver_mask ||
2561 (poll_user_mask && tpacpi_inputdev->users > 0))) {
2562 if (!tpacpi_hotkey_task) {
2563 tpacpi_hotkey_task = kthread_run(hotkey_kthread,
2564 NULL, TPACPI_NVRAM_KTHREAD_NAME);
2565 if (IS_ERR(tpacpi_hotkey_task)) {
2566 tpacpi_hotkey_task = NULL;
2567 printk(TPACPI_ERR
2568 "could not create kernel thread "
2569 "for hotkey polling\n");
2570 }
2571 }
2572 } else {
2573 hotkey_poll_stop_sync();
2574 if (may_warn && (poll_driver_mask || poll_user_mask) &&
2575 hotkey_poll_freq == 0) {
2576 printk(TPACPI_NOTICE
2577 "hot keys 0x%08x and/or events 0x%08x "
2578 "require polling, which is currently "
2579 "disabled\n",
2580 poll_user_mask, poll_driver_mask);
2581 }
2582 }
2583 }
2584
2585 static void hotkey_poll_setup_safe(bool may_warn)
2586 {
2587 mutex_lock(&hotkey_mutex);
2588 hotkey_poll_setup(may_warn);
2589 mutex_unlock(&hotkey_mutex);
2590 }
2591
2592 /* call with hotkey_mutex held */
2593 static void hotkey_poll_set_freq(unsigned int freq)
2594 {
2595 if (!freq)
2596 hotkey_poll_stop_sync();
2597
2598 hotkey_poll_freq = freq;
2599 }
2600
2601 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2602
2603 static void hotkey_poll_setup_safe(bool __unused)
2604 {
2605 }
2606
2607 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2608
2609 static int hotkey_inputdev_open(struct input_dev *dev)
2610 {
2611 switch (tpacpi_lifecycle) {
2612 case TPACPI_LIFE_INIT:
2613 /*
2614 * hotkey_init will call hotkey_poll_setup_safe
2615 * at the appropriate moment
2616 */
2617 return 0;
2618 case TPACPI_LIFE_EXITING:
2619 return -EBUSY;
2620 case TPACPI_LIFE_RUNNING:
2621 hotkey_poll_setup_safe(false);
2622 return 0;
2623 }
2624
2625 /* Should only happen if tpacpi_lifecycle is corrupt */
2626 BUG();
2627 return -EBUSY;
2628 }
2629
2630 static void hotkey_inputdev_close(struct input_dev *dev)
2631 {
2632 /* disable hotkey polling when possible */
2633 if (tpacpi_lifecycle == TPACPI_LIFE_RUNNING &&
2634 !(hotkey_source_mask & hotkey_driver_mask))
2635 hotkey_poll_setup_safe(false);
2636 }
2637
2638 /* sysfs hotkey enable ------------------------------------------------- */
2639 static ssize_t hotkey_enable_show(struct device *dev,
2640 struct device_attribute *attr,
2641 char *buf)
2642 {
2643 int res, status;
2644
2645 printk_deprecated_attribute("hotkey_enable",
2646 "Hotkey reporting is always enabled");
2647
2648 res = hotkey_status_get(&status);
2649 if (res)
2650 return res;
2651
2652 return snprintf(buf, PAGE_SIZE, "%d\n", status);
2653 }
2654
2655 static ssize_t hotkey_enable_store(struct device *dev,
2656 struct device_attribute *attr,
2657 const char *buf, size_t count)
2658 {
2659 unsigned long t;
2660
2661 printk_deprecated_attribute("hotkey_enable",
2662 "Hotkeys can be disabled through hotkey_mask");
2663
2664 if (parse_strtoul(buf, 1, &t))
2665 return -EINVAL;
2666
2667 if (t == 0)
2668 return -EPERM;
2669
2670 return count;
2671 }
2672
2673 static struct device_attribute dev_attr_hotkey_enable =
2674 __ATTR(hotkey_enable, S_IWUSR | S_IRUGO,
2675 hotkey_enable_show, hotkey_enable_store);
2676
2677 /* sysfs hotkey mask --------------------------------------------------- */
2678 static ssize_t hotkey_mask_show(struct device *dev,
2679 struct device_attribute *attr,
2680 char *buf)
2681 {
2682 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_user_mask);
2683 }
2684
2685 static ssize_t hotkey_mask_store(struct device *dev,
2686 struct device_attribute *attr,
2687 const char *buf, size_t count)
2688 {
2689 unsigned long t;
2690 int res;
2691
2692 if (parse_strtoul(buf, 0xffffffffUL, &t))
2693 return -EINVAL;
2694
2695 if (mutex_lock_killable(&hotkey_mutex))
2696 return -ERESTARTSYS;
2697
2698 res = hotkey_user_mask_set(t);
2699
2700 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2701 hotkey_poll_setup(true);
2702 #endif
2703
2704 mutex_unlock(&hotkey_mutex);
2705
2706 tpacpi_disclose_usertask("hotkey_mask", "set to 0x%08lx\n", t);
2707
2708 return (res) ? res : count;
2709 }
2710
2711 static struct device_attribute dev_attr_hotkey_mask =
2712 __ATTR(hotkey_mask, S_IWUSR | S_IRUGO,
2713 hotkey_mask_show, hotkey_mask_store);
2714
2715 /* sysfs hotkey bios_enabled ------------------------------------------- */
2716 static ssize_t hotkey_bios_enabled_show(struct device *dev,
2717 struct device_attribute *attr,
2718 char *buf)
2719 {
2720 return sprintf(buf, "0\n");
2721 }
2722
2723 static struct device_attribute dev_attr_hotkey_bios_enabled =
2724 __ATTR(hotkey_bios_enabled, S_IRUGO, hotkey_bios_enabled_show, NULL);
2725
2726 /* sysfs hotkey bios_mask ---------------------------------------------- */
2727 static ssize_t hotkey_bios_mask_show(struct device *dev,
2728 struct device_attribute *attr,
2729 char *buf)
2730 {
2731 printk_deprecated_attribute("hotkey_bios_mask",
2732 "This attribute is useless.");
2733 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_orig_mask);
2734 }
2735
2736 static struct device_attribute dev_attr_hotkey_bios_mask =
2737 __ATTR(hotkey_bios_mask, S_IRUGO, hotkey_bios_mask_show, NULL);
2738
2739 /* sysfs hotkey all_mask ----------------------------------------------- */
2740 static ssize_t hotkey_all_mask_show(struct device *dev,
2741 struct device_attribute *attr,
2742 char *buf)
2743 {
2744 return snprintf(buf, PAGE_SIZE, "0x%08x\n",
2745 hotkey_all_mask | hotkey_source_mask);
2746 }
2747
2748 static struct device_attribute dev_attr_hotkey_all_mask =
2749 __ATTR(hotkey_all_mask, S_IRUGO, hotkey_all_mask_show, NULL);
2750
2751 /* sysfs hotkey recommended_mask --------------------------------------- */
2752 static ssize_t hotkey_recommended_mask_show(struct device *dev,
2753 struct device_attribute *attr,
2754 char *buf)
2755 {
2756 return snprintf(buf, PAGE_SIZE, "0x%08x\n",
2757 (hotkey_all_mask | hotkey_source_mask)
2758 & ~hotkey_reserved_mask);
2759 }
2760
2761 static struct device_attribute dev_attr_hotkey_recommended_mask =
2762 __ATTR(hotkey_recommended_mask, S_IRUGO,
2763 hotkey_recommended_mask_show, NULL);
2764
2765 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2766
2767 /* sysfs hotkey hotkey_source_mask ------------------------------------- */
2768 static ssize_t hotkey_source_mask_show(struct device *dev,
2769 struct device_attribute *attr,
2770 char *buf)
2771 {
2772 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_source_mask);
2773 }
2774
2775 static ssize_t hotkey_source_mask_store(struct device *dev,
2776 struct device_attribute *attr,
2777 const char *buf, size_t count)
2778 {
2779 unsigned long t;
2780 u32 r_ev;
2781 int rc;
2782
2783 if (parse_strtoul(buf, 0xffffffffUL, &t) ||
2784 ((t & ~TPACPI_HKEY_NVRAM_KNOWN_MASK) != 0))
2785 return -EINVAL;
2786
2787 if (mutex_lock_killable(&hotkey_mutex))
2788 return -ERESTARTSYS;
2789
2790 HOTKEY_CONFIG_CRITICAL_START
2791 hotkey_source_mask = t;
2792 HOTKEY_CONFIG_CRITICAL_END
2793
2794 rc = hotkey_mask_set((hotkey_user_mask | hotkey_driver_mask) &
2795 ~hotkey_source_mask);
2796 hotkey_poll_setup(true);
2797
2798 /* check if events needed by the driver got disabled */
2799 r_ev = hotkey_driver_mask & ~(hotkey_acpi_mask & hotkey_all_mask)
2800 & ~hotkey_source_mask & TPACPI_HKEY_NVRAM_KNOWN_MASK;
2801
2802 mutex_unlock(&hotkey_mutex);
2803
2804 if (rc < 0)
2805 printk(TPACPI_ERR "hotkey_source_mask: failed to update the"
2806 "firmware event mask!\n");
2807
2808 if (r_ev)
2809 printk(TPACPI_NOTICE "hotkey_source_mask: "
2810 "some important events were disabled: "
2811 "0x%04x\n", r_ev);
2812
2813 tpacpi_disclose_usertask("hotkey_source_mask", "set to 0x%08lx\n", t);
2814
2815 return (rc < 0) ? rc : count;
2816 }
2817
2818 static struct device_attribute dev_attr_hotkey_source_mask =
2819 __ATTR(hotkey_source_mask, S_IWUSR | S_IRUGO,
2820 hotkey_source_mask_show, hotkey_source_mask_store);
2821
2822 /* sysfs hotkey hotkey_poll_freq --------------------------------------- */
2823 static ssize_t hotkey_poll_freq_show(struct device *dev,
2824 struct device_attribute *attr,
2825 char *buf)
2826 {
2827 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_poll_freq);
2828 }
2829
2830 static ssize_t hotkey_poll_freq_store(struct device *dev,
2831 struct device_attribute *attr,
2832 const char *buf, size_t count)
2833 {
2834 unsigned long t;
2835
2836 if (parse_strtoul(buf, 25, &t))
2837 return -EINVAL;
2838
2839 if (mutex_lock_killable(&hotkey_mutex))
2840 return -ERESTARTSYS;
2841
2842 hotkey_poll_set_freq(t);
2843 hotkey_poll_setup(true);
2844
2845 mutex_unlock(&hotkey_mutex);
2846
2847 tpacpi_disclose_usertask("hotkey_poll_freq", "set to %lu\n", t);
2848
2849 return count;
2850 }
2851
2852 static struct device_attribute dev_attr_hotkey_poll_freq =
2853 __ATTR(hotkey_poll_freq, S_IWUSR | S_IRUGO,
2854 hotkey_poll_freq_show, hotkey_poll_freq_store);
2855
2856 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2857
2858 /* sysfs hotkey radio_sw (pollable) ------------------------------------ */
2859 static ssize_t hotkey_radio_sw_show(struct device *dev,
2860 struct device_attribute *attr,
2861 char *buf)
2862 {
2863 int res;
2864 res = hotkey_get_wlsw();
2865 if (res < 0)
2866 return res;
2867
2868 /* Opportunistic update */
2869 tpacpi_rfk_update_hwblock_state((res == TPACPI_RFK_RADIO_OFF));
2870
2871 return snprintf(buf, PAGE_SIZE, "%d\n",
2872 (res == TPACPI_RFK_RADIO_OFF) ? 0 : 1);
2873 }
2874
2875 static struct device_attribute dev_attr_hotkey_radio_sw =
2876 __ATTR(hotkey_radio_sw, S_IRUGO, hotkey_radio_sw_show, NULL);
2877
2878 static void hotkey_radio_sw_notify_change(void)
2879 {
2880 if (tp_features.hotkey_wlsw)
2881 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2882 "hotkey_radio_sw");
2883 }
2884
2885 /* sysfs hotkey tablet mode (pollable) --------------------------------- */
2886 static ssize_t hotkey_tablet_mode_show(struct device *dev,
2887 struct device_attribute *attr,
2888 char *buf)
2889 {
2890 int res, s;
2891 res = hotkey_get_tablet_mode(&s);
2892 if (res < 0)
2893 return res;
2894
2895 return snprintf(buf, PAGE_SIZE, "%d\n", !!s);
2896 }
2897
2898 static struct device_attribute dev_attr_hotkey_tablet_mode =
2899 __ATTR(hotkey_tablet_mode, S_IRUGO, hotkey_tablet_mode_show, NULL);
2900
2901 static void hotkey_tablet_mode_notify_change(void)
2902 {
2903 if (tp_features.hotkey_tablet)
2904 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2905 "hotkey_tablet_mode");
2906 }
2907
2908 /* sysfs hotkey report_mode -------------------------------------------- */
2909 static ssize_t hotkey_report_mode_show(struct device *dev,
2910 struct device_attribute *attr,
2911 char *buf)
2912 {
2913 return snprintf(buf, PAGE_SIZE, "%d\n",
2914 (hotkey_report_mode != 0) ? hotkey_report_mode : 1);
2915 }
2916
2917 static struct device_attribute dev_attr_hotkey_report_mode =
2918 __ATTR(hotkey_report_mode, S_IRUGO, hotkey_report_mode_show, NULL);
2919
2920 /* sysfs wakeup reason (pollable) -------------------------------------- */
2921 static ssize_t hotkey_wakeup_reason_show(struct device *dev,
2922 struct device_attribute *attr,
2923 char *buf)
2924 {
2925 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_wakeup_reason);
2926 }
2927
2928 static struct device_attribute dev_attr_hotkey_wakeup_reason =
2929 __ATTR(wakeup_reason, S_IRUGO, hotkey_wakeup_reason_show, NULL);
2930
2931 static void hotkey_wakeup_reason_notify_change(void)
2932 {
2933 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2934 "wakeup_reason");
2935 }
2936
2937 /* sysfs wakeup hotunplug_complete (pollable) -------------------------- */
2938 static ssize_t hotkey_wakeup_hotunplug_complete_show(struct device *dev,
2939 struct device_attribute *attr,
2940 char *buf)
2941 {
2942 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_autosleep_ack);
2943 }
2944
2945 static struct device_attribute dev_attr_hotkey_wakeup_hotunplug_complete =
2946 __ATTR(wakeup_hotunplug_complete, S_IRUGO,
2947 hotkey_wakeup_hotunplug_complete_show, NULL);
2948
2949 static void hotkey_wakeup_hotunplug_complete_notify_change(void)
2950 {
2951 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2952 "wakeup_hotunplug_complete");
2953 }
2954
2955 /* --------------------------------------------------------------------- */
2956
2957 static struct attribute *hotkey_attributes[] __initdata = {
2958 &dev_attr_hotkey_enable.attr,
2959 &dev_attr_hotkey_bios_enabled.attr,
2960 &dev_attr_hotkey_bios_mask.attr,
2961 &dev_attr_hotkey_report_mode.attr,
2962 &dev_attr_hotkey_wakeup_reason.attr,
2963 &dev_attr_hotkey_wakeup_hotunplug_complete.attr,
2964 &dev_attr_hotkey_mask.attr,
2965 &dev_attr_hotkey_all_mask.attr,
2966 &dev_attr_hotkey_recommended_mask.attr,
2967 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2968 &dev_attr_hotkey_source_mask.attr,
2969 &dev_attr_hotkey_poll_freq.attr,
2970 #endif
2971 };
2972
2973 /*
2974 * Sync both the hw and sw blocking state of all switches
2975 */
2976 static void tpacpi_send_radiosw_update(void)
2977 {
2978 int wlsw;
2979
2980 /*
2981 * We must sync all rfkill controllers *before* issuing any
2982 * rfkill input events, or we will race the rfkill core input
2983 * handler.
2984 *
2985 * tpacpi_inputdev_send_mutex works as a syncronization point
2986 * for the above.
2987 *
2988 * We optimize to avoid numerous calls to hotkey_get_wlsw.
2989 */
2990
2991 wlsw = hotkey_get_wlsw();
2992
2993 /* Sync hw blocking state first if it is hw-blocked */
2994 if (wlsw == TPACPI_RFK_RADIO_OFF)
2995 tpacpi_rfk_update_hwblock_state(true);
2996
2997 /* Sync sw blocking state */
2998 tpacpi_rfk_update_swstate_all();
2999
3000 /* Sync hw blocking state last if it is hw-unblocked */
3001 if (wlsw == TPACPI_RFK_RADIO_ON)
3002 tpacpi_rfk_update_hwblock_state(false);
3003
3004 /* Issue rfkill input event for WLSW switch */
3005 if (!(wlsw < 0)) {
3006 mutex_lock(&tpacpi_inputdev_send_mutex);
3007
3008 input_report_switch(tpacpi_inputdev,
3009 SW_RFKILL_ALL, (wlsw > 0));
3010 input_sync(tpacpi_inputdev);
3011
3012 mutex_unlock(&tpacpi_inputdev_send_mutex);
3013 }
3014
3015 /*
3016 * this can be unconditional, as we will poll state again
3017 * if userspace uses the notify to read data
3018 */
3019 hotkey_radio_sw_notify_change();
3020 }
3021
3022 static void hotkey_exit(void)
3023 {
3024 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
3025 mutex_lock(&hotkey_mutex);
3026 hotkey_poll_stop_sync();
3027 mutex_unlock(&hotkey_mutex);
3028 #endif
3029
3030 if (hotkey_dev_attributes)
3031 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
3032
3033 kfree(hotkey_keycode_map);
3034
3035 dbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_HKEY,
3036 "restoring original HKEY status and mask\n");
3037 /* yes, there is a bitwise or below, we want the
3038 * functions to be called even if one of them fail */
3039 if (((tp_features.hotkey_mask &&
3040 hotkey_mask_set(hotkey_orig_mask)) |
3041 hotkey_status_set(false)) != 0)
3042 printk(TPACPI_ERR
3043 "failed to restore hot key mask "
3044 "to BIOS defaults\n");
3045 }
3046
3047 static void __init hotkey_unmap(const unsigned int scancode)
3048 {
3049 if (hotkey_keycode_map[scancode] != KEY_RESERVED) {
3050 clear_bit(hotkey_keycode_map[scancode],
3051 tpacpi_inputdev->keybit);
3052 hotkey_keycode_map[scancode] = KEY_RESERVED;
3053 }
3054 }
3055
3056 /*
3057 * HKEY quirks:
3058 * TPACPI_HK_Q_INIMASK: Supports FN+F3,FN+F4,FN+F12
3059 */
3060
3061 #define TPACPI_HK_Q_INIMASK 0x0001
3062
3063 static const struct tpacpi_quirk tpacpi_hotkey_qtable[] __initconst = {
3064 TPACPI_Q_IBM('I', 'H', TPACPI_HK_Q_INIMASK), /* 600E */
3065 TPACPI_Q_IBM('I', 'N', TPACPI_HK_Q_INIMASK), /* 600E */
3066 TPACPI_Q_IBM('I', 'D', TPACPI_HK_Q_INIMASK), /* 770, 770E, 770ED */
3067 TPACPI_Q_IBM('I', 'W', TPACPI_HK_Q_INIMASK), /* A20m */
3068 TPACPI_Q_IBM('I', 'V', TPACPI_HK_Q_INIMASK), /* A20p */
3069 TPACPI_Q_IBM('1', '0', TPACPI_HK_Q_INIMASK), /* A21e, A22e */
3070 TPACPI_Q_IBM('K', 'U', TPACPI_HK_Q_INIMASK), /* A21e */
3071 TPACPI_Q_IBM('K', 'X', TPACPI_HK_Q_INIMASK), /* A21m, A22m */
3072 TPACPI_Q_IBM('K', 'Y', TPACPI_HK_Q_INIMASK), /* A21p, A22p */
3073 TPACPI_Q_IBM('1', 'B', TPACPI_HK_Q_INIMASK), /* A22e */
3074 TPACPI_Q_IBM('1', '3', TPACPI_HK_Q_INIMASK), /* A22m */
3075 TPACPI_Q_IBM('1', 'E', TPACPI_HK_Q_INIMASK), /* A30/p (0) */
3076 TPACPI_Q_IBM('1', 'C', TPACPI_HK_Q_INIMASK), /* R30 */
3077 TPACPI_Q_IBM('1', 'F', TPACPI_HK_Q_INIMASK), /* R31 */
3078 TPACPI_Q_IBM('I', 'Y', TPACPI_HK_Q_INIMASK), /* T20 */
3079 TPACPI_Q_IBM('K', 'Z', TPACPI_HK_Q_INIMASK), /* T21 */
3080 TPACPI_Q_IBM('1', '6', TPACPI_HK_Q_INIMASK), /* T22 */
3081 TPACPI_Q_IBM('I', 'Z', TPACPI_HK_Q_INIMASK), /* X20, X21 */
3082 TPACPI_Q_IBM('1', 'D', TPACPI_HK_Q_INIMASK), /* X22, X23, X24 */
3083 };
3084
3085 static int __init hotkey_init(struct ibm_init_struct *iibm)
3086 {
3087 /* Requirements for changing the default keymaps:
3088 *
3089 * 1. Many of the keys are mapped to KEY_RESERVED for very
3090 * good reasons. Do not change them unless you have deep
3091 * knowledge on the IBM and Lenovo ThinkPad firmware for
3092 * the various ThinkPad models. The driver behaves
3093 * differently for KEY_RESERVED: such keys have their
3094 * hot key mask *unset* in mask_recommended, and also
3095 * in the initial hot key mask programmed into the
3096 * firmware at driver load time, which means the firm-
3097 * ware may react very differently if you change them to
3098 * something else;
3099 *
3100 * 2. You must be subscribed to the linux-thinkpad and
3101 * ibm-acpi-devel mailing lists, and you should read the
3102 * list archives since 2007 if you want to change the
3103 * keymaps. This requirement exists so that you will
3104 * know the past history of problems with the thinkpad-
3105 * acpi driver keymaps, and also that you will be
3106 * listening to any bug reports;
3107 *
3108 * 3. Do not send thinkpad-acpi specific patches directly to
3109 * for merging, *ever*. Send them to the linux-acpi
3110 * mailinglist for comments. Merging is to be done only
3111 * through acpi-test and the ACPI maintainer.
3112 *
3113 * If the above is too much to ask, don't change the keymap.
3114 * Ask the thinkpad-acpi maintainer to do it, instead.
3115 */
3116 static u16 ibm_keycode_map[] __initdata = {
3117 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
3118 KEY_FN_F1, KEY_FN_F2, KEY_COFFEE, KEY_SLEEP,
3119 KEY_WLAN, KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
3120 KEY_FN_F9, KEY_FN_F10, KEY_FN_F11, KEY_SUSPEND,
3121
3122 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
3123 KEY_UNKNOWN, /* 0x0C: FN+BACKSPACE */
3124 KEY_UNKNOWN, /* 0x0D: FN+INSERT */
3125 KEY_UNKNOWN, /* 0x0E: FN+DELETE */
3126
3127 /* brightness: firmware always reacts to them */
3128 KEY_RESERVED, /* 0x0F: FN+HOME (brightness up) */
3129 KEY_RESERVED, /* 0x10: FN+END (brightness down) */
3130
3131 /* Thinklight: firmware always react to it */
3132 KEY_RESERVED, /* 0x11: FN+PGUP (thinklight toggle) */
3133
3134 KEY_UNKNOWN, /* 0x12: FN+PGDOWN */
3135 KEY_ZOOM, /* 0x13: FN+SPACE (zoom) */
3136
3137 /* Volume: firmware always react to it and reprograms
3138 * the built-in *extra* mixer. Never map it to control
3139 * another mixer by default. */
3140 KEY_RESERVED, /* 0x14: VOLUME UP */
3141 KEY_RESERVED, /* 0x15: VOLUME DOWN */
3142 KEY_RESERVED, /* 0x16: MUTE */
3143
3144 KEY_VENDOR, /* 0x17: Thinkpad/AccessIBM/Lenovo */
3145
3146 /* (assignments unknown, please report if found) */
3147 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3148 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3149 };
3150 static u16 lenovo_keycode_map[] __initdata = {
3151 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
3152 KEY_FN_F1, KEY_COFFEE, KEY_BATTERY, KEY_SLEEP,
3153 KEY_WLAN, KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
3154 KEY_FN_F9, KEY_FN_F10, KEY_FN_F11, KEY_SUSPEND,
3155
3156 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
3157 KEY_UNKNOWN, /* 0x0C: FN+BACKSPACE */
3158 KEY_UNKNOWN, /* 0x0D: FN+INSERT */
3159 KEY_UNKNOWN, /* 0x0E: FN+DELETE */
3160
3161 /* These should be enabled --only-- when ACPI video
3162 * is disabled (i.e. in "vendor" mode), and are handled
3163 * in a special way by the init code */
3164 KEY_BRIGHTNESSUP, /* 0x0F: FN+HOME (brightness up) */
3165 KEY_BRIGHTNESSDOWN, /* 0x10: FN+END (brightness down) */
3166
3167 KEY_RESERVED, /* 0x11: FN+PGUP (thinklight toggle) */
3168
3169 KEY_UNKNOWN, /* 0x12: FN+PGDOWN */
3170 KEY_ZOOM, /* 0x13: FN+SPACE (zoom) */
3171
3172 /* Volume: z60/z61, T60 (BIOS version?): firmware always
3173 * react to it and reprograms the built-in *extra* mixer.
3174 * Never map it to control another mixer by default.
3175 *
3176 * T60?, T61, R60?, R61: firmware and EC tries to send
3177 * these over the regular keyboard, so these are no-ops,
3178 * but there are still weird bugs re. MUTE, so do not
3179 * change unless you get test reports from all Lenovo
3180 * models. May cause the BIOS to interfere with the
3181 * HDA mixer.
3182 */
3183 KEY_RESERVED, /* 0x14: VOLUME UP */
3184 KEY_RESERVED, /* 0x15: VOLUME DOWN */
3185 KEY_RESERVED, /* 0x16: MUTE */
3186
3187 KEY_VENDOR, /* 0x17: Thinkpad/AccessIBM/Lenovo */
3188
3189 /* (assignments unknown, please report if found) */
3190 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3191 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3192 };
3193
3194 #define TPACPI_HOTKEY_MAP_LEN ARRAY_SIZE(ibm_keycode_map)
3195 #define TPACPI_HOTKEY_MAP_SIZE sizeof(ibm_keycode_map)
3196 #define TPACPI_HOTKEY_MAP_TYPESIZE sizeof(ibm_keycode_map[0])
3197
3198 int res, i;
3199 int status;
3200 int hkeyv;
3201 bool radiosw_state = false;
3202 bool tabletsw_state = false;
3203
3204 unsigned long quirks;
3205
3206 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3207 "initializing hotkey subdriver\n");
3208
3209 BUG_ON(!tpacpi_inputdev);
3210 BUG_ON(tpacpi_inputdev->open != NULL ||
3211 tpacpi_inputdev->close != NULL);
3212
3213 TPACPI_ACPIHANDLE_INIT(hkey);
3214 mutex_init(&hotkey_mutex);
3215
3216 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
3217 mutex_init(&hotkey_thread_mutex);
3218 mutex_init(&hotkey_thread_data_mutex);
3219 #endif
3220
3221 /* hotkey not supported on 570 */
3222 tp_features.hotkey = hkey_handle != NULL;
3223
3224 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3225 "hotkeys are %s\n",
3226 str_supported(tp_features.hotkey));
3227
3228 if (!tp_features.hotkey)
3229 return 1;
3230
3231 quirks = tpacpi_check_quirks(tpacpi_hotkey_qtable,
3232 ARRAY_SIZE(tpacpi_hotkey_qtable));
3233
3234 tpacpi_disable_brightness_delay();
3235
3236 /* MUST have enough space for all attributes to be added to
3237 * hotkey_dev_attributes */
3238 hotkey_dev_attributes = create_attr_set(
3239 ARRAY_SIZE(hotkey_attributes) + 2,
3240 NULL);
3241 if (!hotkey_dev_attributes)
3242 return -ENOMEM;
3243 res = add_many_to_attr_set(hotkey_dev_attributes,
3244 hotkey_attributes,
3245 ARRAY_SIZE(hotkey_attributes));
3246 if (res)
3247 goto err_exit;
3248
3249 /* mask not supported on 600e/x, 770e, 770x, A21e, A2xm/p,
3250 A30, R30, R31, T20-22, X20-21, X22-24. Detected by checking
3251 for HKEY interface version 0x100 */
3252 if (acpi_evalf(hkey_handle, &hkeyv, "MHKV", "qd")) {
3253 if ((hkeyv >> 8) != 1) {
3254 printk(TPACPI_ERR "unknown version of the "
3255 "HKEY interface: 0x%x\n", hkeyv);
3256 printk(TPACPI_ERR "please report this to %s\n",
3257 TPACPI_MAIL);
3258 } else {
3259 /*
3260 * MHKV 0x100 in A31, R40, R40e,
3261 * T4x, X31, and later
3262 */
3263 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3264 "firmware HKEY interface version: 0x%x\n",
3265 hkeyv);
3266
3267 /* Paranoia check AND init hotkey_all_mask */
3268 if (!acpi_evalf(hkey_handle, &hotkey_all_mask,
3269 "MHKA", "qd")) {
3270 printk(TPACPI_ERR
3271 "missing MHKA handler, "
3272 "please report this to %s\n",
3273 TPACPI_MAIL);
3274 /* Fallback: pre-init for FN+F3,F4,F12 */
3275 hotkey_all_mask = 0x080cU;
3276 } else {
3277 tp_features.hotkey_mask = 1;
3278 }
3279 }
3280 }
3281
3282 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3283 "hotkey masks are %s\n",
3284 str_supported(tp_features.hotkey_mask));
3285
3286 /* Init hotkey_all_mask if not initialized yet */
3287 if (!tp_features.hotkey_mask && !hotkey_all_mask &&
3288 (quirks & TPACPI_HK_Q_INIMASK))
3289 hotkey_all_mask = 0x080cU; /* FN+F12, FN+F4, FN+F3 */
3290
3291 /* Init hotkey_acpi_mask and hotkey_orig_mask */
3292 if (tp_features.hotkey_mask) {
3293 /* hotkey_source_mask *must* be zero for
3294 * the first hotkey_mask_get to return hotkey_orig_mask */
3295 res = hotkey_mask_get();
3296 if (res)
3297 goto err_exit;
3298
3299 hotkey_orig_mask = hotkey_acpi_mask;
3300 } else {
3301 hotkey_orig_mask = hotkey_all_mask;
3302 hotkey_acpi_mask = hotkey_all_mask;
3303 }
3304
3305 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3306 if (dbg_wlswemul) {
3307 tp_features.hotkey_wlsw = 1;
3308 radiosw_state = !!tpacpi_wlsw_emulstate;
3309 printk(TPACPI_INFO
3310 "radio switch emulation enabled\n");
3311 } else
3312 #endif
3313 /* Not all thinkpads have a hardware radio switch */
3314 if (acpi_evalf(hkey_handle, &status, "WLSW", "qd")) {
3315 tp_features.hotkey_wlsw = 1;
3316 radiosw_state = !!status;
3317 printk(TPACPI_INFO
3318 "radio switch found; radios are %s\n",
3319 enabled(status, 0));
3320 }
3321 if (tp_features.hotkey_wlsw)
3322 res = add_to_attr_set(hotkey_dev_attributes,
3323 &dev_attr_hotkey_radio_sw.attr);
3324
3325 /* For X41t, X60t, X61t Tablets... */
3326 if (!res && acpi_evalf(hkey_handle, &status, "MHKG", "qd")) {
3327 tp_features.hotkey_tablet = 1;
3328 tabletsw_state = !!(status & TP_HOTKEY_TABLET_MASK);
3329 printk(TPACPI_INFO
3330 "possible tablet mode switch found; "
3331 "ThinkPad in %s mode\n",
3332 (tabletsw_state) ? "tablet" : "laptop");
3333 res = add_to_attr_set(hotkey_dev_attributes,
3334 &dev_attr_hotkey_tablet_mode.attr);
3335 }
3336
3337 if (!res)
3338 res = register_attr_set_with_sysfs(
3339 hotkey_dev_attributes,
3340 &tpacpi_pdev->dev.kobj);
3341 if (res)
3342 goto err_exit;
3343
3344 /* Set up key map */
3345
3346 hotkey_keycode_map = kmalloc(TPACPI_HOTKEY_MAP_SIZE,
3347 GFP_KERNEL);
3348 if (!hotkey_keycode_map) {
3349 printk(TPACPI_ERR
3350 "failed to allocate memory for key map\n");
3351 res = -ENOMEM;
3352 goto err_exit;
3353 }
3354
3355 if (thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO) {
3356 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3357 "using Lenovo default hot key map\n");
3358 memcpy(hotkey_keycode_map, &lenovo_keycode_map,
3359 TPACPI_HOTKEY_MAP_SIZE);
3360 } else {
3361 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3362 "using IBM default hot key map\n");
3363 memcpy(hotkey_keycode_map, &ibm_keycode_map,
3364 TPACPI_HOTKEY_MAP_SIZE);
3365 }
3366
3367 input_set_capability(tpacpi_inputdev, EV_MSC, MSC_SCAN);
3368 tpacpi_inputdev->keycodesize = TPACPI_HOTKEY_MAP_TYPESIZE;
3369 tpacpi_inputdev->keycodemax = TPACPI_HOTKEY_MAP_LEN;
3370 tpacpi_inputdev->keycode = hotkey_keycode_map;
3371 for (i = 0; i < TPACPI_HOTKEY_MAP_LEN; i++) {
3372 if (hotkey_keycode_map[i] != KEY_RESERVED) {
3373 input_set_capability(tpacpi_inputdev, EV_KEY,
3374 hotkey_keycode_map[i]);
3375 } else {
3376 if (i < sizeof(hotkey_reserved_mask)*8)
3377 hotkey_reserved_mask |= 1 << i;
3378 }
3379 }
3380
3381 if (tp_features.hotkey_wlsw) {
3382 input_set_capability(tpacpi_inputdev, EV_SW, SW_RFKILL_ALL);
3383 input_report_switch(tpacpi_inputdev,
3384 SW_RFKILL_ALL, radiosw_state);
3385 }
3386 if (tp_features.hotkey_tablet) {
3387 input_set_capability(tpacpi_inputdev, EV_SW, SW_TABLET_MODE);
3388 input_report_switch(tpacpi_inputdev,
3389 SW_TABLET_MODE, tabletsw_state);
3390 }
3391
3392 /* Do not issue duplicate brightness change events to
3393 * userspace */
3394 if (!tp_features.bright_acpimode)
3395 /* update bright_acpimode... */
3396 tpacpi_check_std_acpi_brightness_support();
3397
3398 if (tp_features.bright_acpimode && acpi_video_backlight_support()) {
3399 printk(TPACPI_INFO
3400 "This ThinkPad has standard ACPI backlight "
3401 "brightness control, supported by the ACPI "
3402 "video driver\n");
3403 printk(TPACPI_NOTICE
3404 "Disabling thinkpad-acpi brightness events "
3405 "by default...\n");
3406
3407 /* Disable brightness up/down on Lenovo thinkpads when
3408 * ACPI is handling them, otherwise it is plain impossible
3409 * for userspace to do something even remotely sane */
3410 hotkey_reserved_mask |=
3411 (1 << TP_ACPI_HOTKEYSCAN_FNHOME)
3412 | (1 << TP_ACPI_HOTKEYSCAN_FNEND);
3413 hotkey_unmap(TP_ACPI_HOTKEYSCAN_FNHOME);
3414 hotkey_unmap(TP_ACPI_HOTKEYSCAN_FNEND);
3415 }
3416
3417 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
3418 hotkey_source_mask = TPACPI_HKEY_NVRAM_GOOD_MASK
3419 & ~hotkey_all_mask
3420 & ~hotkey_reserved_mask;
3421
3422 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3423 "hotkey source mask 0x%08x, polling freq %u\n",
3424 hotkey_source_mask, hotkey_poll_freq);
3425 #endif
3426
3427 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3428 "enabling firmware HKEY event interface...\n");
3429 res = hotkey_status_set(true);
3430 if (res) {
3431 hotkey_exit();
3432 return res;
3433 }
3434 res = hotkey_mask_set(((hotkey_all_mask & ~hotkey_reserved_mask)
3435 | hotkey_driver_mask)
3436 & ~hotkey_source_mask);
3437 if (res < 0 && res != -ENXIO) {
3438 hotkey_exit();
3439 return res;
3440 }
3441 hotkey_user_mask = (hotkey_acpi_mask | hotkey_source_mask)
3442 & ~hotkey_reserved_mask;
3443 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3444 "initial masks: user=0x%08x, fw=0x%08x, poll=0x%08x\n",
3445 hotkey_user_mask, hotkey_acpi_mask, hotkey_source_mask);
3446
3447 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3448 "legacy ibm/hotkey event reporting over procfs %s\n",
3449 (hotkey_report_mode < 2) ?
3450 "enabled" : "disabled");
3451
3452 tpacpi_inputdev->open = &hotkey_inputdev_open;
3453 tpacpi_inputdev->close = &hotkey_inputdev_close;
3454
3455 hotkey_poll_setup_safe(true);
3456
3457 return 0;
3458
3459 err_exit:
3460 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
3461 hotkey_dev_attributes = NULL;
3462
3463 return (res < 0)? res : 1;
3464 }
3465
3466 static bool hotkey_notify_hotkey(const u32 hkey,
3467 bool *send_acpi_ev,
3468 bool *ignore_acpi_ev)
3469 {
3470 /* 0x1000-0x1FFF: key presses */
3471 unsigned int scancode = hkey & 0xfff;
3472 *send_acpi_ev = true;
3473 *ignore_acpi_ev = false;
3474
3475 if (scancode > 0 && scancode < 0x21) {
3476 scancode--;
3477 if (!(hotkey_source_mask & (1 << scancode))) {
3478 tpacpi_input_send_key_masked(scancode);
3479 *send_acpi_ev = false;
3480 } else {
3481 *ignore_acpi_ev = true;
3482 }
3483 return true;
3484 }
3485 return false;
3486 }
3487
3488 static bool hotkey_notify_wakeup(const u32 hkey,
3489 bool *send_acpi_ev,
3490 bool *ignore_acpi_ev)
3491 {
3492 /* 0x2000-0x2FFF: Wakeup reason */
3493 *send_acpi_ev = true;
3494 *ignore_acpi_ev = false;
3495
3496 switch (hkey) {
3497 case TP_HKEY_EV_WKUP_S3_UNDOCK: /* suspend, undock */
3498 case TP_HKEY_EV_WKUP_S4_UNDOCK: /* hibernation, undock */
3499 hotkey_wakeup_reason = TP_ACPI_WAKEUP_UNDOCK;
3500 *ignore_acpi_ev = true;
3501 break;
3502
3503 case TP_HKEY_EV_WKUP_S3_BAYEJ: /* suspend, bay eject */
3504 case TP_HKEY_EV_WKUP_S4_BAYEJ: /* hibernation, bay eject */
3505 hotkey_wakeup_reason = TP_ACPI_WAKEUP_BAYEJ;
3506 *ignore_acpi_ev = true;
3507 break;
3508
3509 case TP_HKEY_EV_WKUP_S3_BATLOW: /* Battery on critical low level/S3 */
3510 case TP_HKEY_EV_WKUP_S4_BATLOW: /* Battery on critical low level/S4 */
3511 printk(TPACPI_ALERT
3512 "EMERGENCY WAKEUP: battery almost empty\n");
3513 /* how to auto-heal: */
3514 /* 2313: woke up from S3, go to S4/S5 */
3515 /* 2413: woke up from S4, go to S5 */
3516 break;
3517
3518 default:
3519 return false;
3520 }
3521
3522 if (hotkey_wakeup_reason != TP_ACPI_WAKEUP_NONE) {
3523 printk(TPACPI_INFO
3524 "woke up due to a hot-unplug "
3525 "request...\n");
3526 hotkey_wakeup_reason_notify_change();
3527 }
3528 return true;
3529 }
3530
3531 static bool hotkey_notify_usrevent(const u32 hkey,
3532 bool *send_acpi_ev,
3533 bool *ignore_acpi_ev)
3534 {
3535 /* 0x5000-0x5FFF: human interface helpers */
3536 *send_acpi_ev = true;
3537 *ignore_acpi_ev = false;
3538
3539 switch (hkey) {
3540 case TP_HKEY_EV_PEN_INSERTED: /* X61t: tablet pen inserted into bay */
3541 case TP_HKEY_EV_PEN_REMOVED: /* X61t: tablet pen removed from bay */
3542 return true;
3543
3544 case TP_HKEY_EV_TABLET_TABLET: /* X41t-X61t: tablet mode */
3545 case TP_HKEY_EV_TABLET_NOTEBOOK: /* X41t-X61t: normal mode */
3546 tpacpi_input_send_tabletsw();
3547 hotkey_tablet_mode_notify_change();
3548 *send_acpi_ev = false;
3549 return true;
3550
3551 case TP_HKEY_EV_LID_CLOSE: /* Lid closed */
3552 case TP_HKEY_EV_LID_OPEN: /* Lid opened */
3553 case TP_HKEY_EV_BRGHT_CHANGED: /* brightness changed */
3554 /* do not propagate these events */
3555 *ignore_acpi_ev = true;
3556 return true;
3557
3558 default:
3559 return false;
3560 }
3561 }
3562
3563 static void thermal_dump_all_sensors(void);
3564
3565 static bool hotkey_notify_thermal(const u32 hkey,
3566 bool *send_acpi_ev,
3567 bool *ignore_acpi_ev)
3568 {
3569 bool known = true;
3570
3571 /* 0x6000-0x6FFF: thermal alarms */
3572 *send_acpi_ev = true;
3573 *ignore_acpi_ev = false;
3574
3575 switch (hkey) {
3576 case TP_HKEY_EV_THM_TABLE_CHANGED:
3577 printk(TPACPI_INFO
3578 "EC reports that Thermal Table has changed\n");
3579 /* recommended action: do nothing, we don't have
3580 * Lenovo ATM information */
3581 return true;
3582 case TP_HKEY_EV_ALARM_BAT_HOT:
3583 printk(TPACPI_CRIT
3584 "THERMAL ALARM: battery is too hot!\n");
3585 /* recommended action: warn user through gui */
3586 break;
3587 case TP_HKEY_EV_ALARM_BAT_XHOT:
3588 printk(TPACPI_ALERT
3589 "THERMAL EMERGENCY: battery is extremely hot!\n");
3590 /* recommended action: immediate sleep/hibernate */
3591 break;
3592 case TP_HKEY_EV_ALARM_SENSOR_HOT:
3593 printk(TPACPI_CRIT
3594 "THERMAL ALARM: "
3595 "a sensor reports something is too hot!\n");
3596 /* recommended action: warn user through gui, that */
3597 /* some internal component is too hot */
3598 break;
3599 case TP_HKEY_EV_ALARM_SENSOR_XHOT:
3600 printk(TPACPI_ALERT
3601 "THERMAL EMERGENCY: "
3602 "a sensor reports something is extremely hot!\n");
3603 /* recommended action: immediate sleep/hibernate */
3604 break;
3605 default:
3606 printk(TPACPI_ALERT
3607 "THERMAL ALERT: unknown thermal alarm received\n");
3608 known = false;
3609 }
3610
3611 thermal_dump_all_sensors();
3612
3613 return known;
3614 }
3615
3616 static void hotkey_notify(struct ibm_struct *ibm, u32 event)
3617 {
3618 u32 hkey;
3619 bool send_acpi_ev;
3620 bool ignore_acpi_ev;
3621 bool known_ev;
3622
3623 if (event != 0x80) {
3624 printk(TPACPI_ERR
3625 "unknown HKEY notification event %d\n", event);
3626 /* forward it to userspace, maybe it knows how to handle it */
3627 acpi_bus_generate_netlink_event(
3628 ibm->acpi->device->pnp.device_class,
3629 dev_name(&ibm->acpi->device->dev),
3630 event, 0);
3631 return;
3632 }
3633
3634 while (1) {
3635 if (!acpi_evalf(hkey_handle, &hkey, "MHKP", "d")) {
3636 printk(TPACPI_ERR "failed to retrieve HKEY event\n");
3637 return;
3638 }
3639
3640 if (hkey == 0) {
3641 /* queue empty */
3642 return;
3643 }
3644
3645 send_acpi_ev = true;
3646 ignore_acpi_ev = false;
3647
3648 switch (hkey >> 12) {
3649 case 1:
3650 /* 0x1000-0x1FFF: key presses */
3651 known_ev = hotkey_notify_hotkey(hkey, &send_acpi_ev,
3652 &ignore_acpi_ev);
3653 break;
3654 case 2:
3655 /* 0x2000-0x2FFF: Wakeup reason */
3656 known_ev = hotkey_notify_wakeup(hkey, &send_acpi_ev,
3657 &ignore_acpi_ev);
3658 break;
3659 case 3:
3660 /* 0x3000-0x3FFF: bay-related wakeups */
3661 if (hkey == TP_HKEY_EV_BAYEJ_ACK) {
3662 hotkey_autosleep_ack = 1;
3663 printk(TPACPI_INFO
3664 "bay ejected\n");
3665 hotkey_wakeup_hotunplug_complete_notify_change();
3666 known_ev = true;
3667 } else {
3668 known_ev = false;
3669 }
3670 break;
3671 case 4:
3672 /* 0x4000-0x4FFF: dock-related wakeups */
3673 if (hkey == TP_HKEY_EV_UNDOCK_ACK) {
3674 hotkey_autosleep_ack = 1;
3675 printk(TPACPI_INFO
3676 "undocked\n");
3677 hotkey_wakeup_hotunplug_complete_notify_change();
3678 known_ev = true;
3679 } else {
3680 known_ev = false;
3681 }
3682 break;
3683 case 5:
3684 /* 0x5000-0x5FFF: human interface helpers */
3685 known_ev = hotkey_notify_usrevent(hkey, &send_acpi_ev,
3686 &ignore_acpi_ev);
3687 break;
3688 case 6:
3689 /* 0x6000-0x6FFF: thermal alarms */
3690 known_ev = hotkey_notify_thermal(hkey, &send_acpi_ev,
3691 &ignore_acpi_ev);
3692 break;
3693 case 7:
3694 /* 0x7000-0x7FFF: misc */
3695 if (tp_features.hotkey_wlsw &&
3696 hkey == TP_HKEY_EV_RFKILL_CHANGED) {
3697 tpacpi_send_radiosw_update();
3698 send_acpi_ev = 0;
3699 known_ev = true;
3700 break;
3701 }
3702 /* fallthrough to default */
3703 default:
3704 known_ev = false;
3705 }
3706 if (!known_ev) {
3707 printk(TPACPI_NOTICE
3708 "unhandled HKEY event 0x%04x\n", hkey);
3709 printk(TPACPI_NOTICE
3710 "please report the conditions when this "
3711 "event happened to %s\n", TPACPI_MAIL);
3712 }
3713
3714 /* Legacy events */
3715 if (!ignore_acpi_ev &&
3716 (send_acpi_ev || hotkey_report_mode < 2)) {
3717 acpi_bus_generate_proc_event(ibm->acpi->device,
3718 event, hkey);
3719 }
3720
3721 /* netlink events */
3722 if (!ignore_acpi_ev && send_acpi_ev) {
3723 acpi_bus_generate_netlink_event(
3724 ibm->acpi->device->pnp.device_class,
3725 dev_name(&ibm->acpi->device->dev),
3726 event, hkey);
3727 }
3728 }
3729 }
3730
3731 static void hotkey_suspend(pm_message_t state)
3732 {
3733 /* Do these on suspend, we get the events on early resume! */
3734 hotkey_wakeup_reason = TP_ACPI_WAKEUP_NONE;
3735 hotkey_autosleep_ack = 0;
3736 }
3737
3738 static void hotkey_resume(void)
3739 {
3740 tpacpi_disable_brightness_delay();
3741
3742 if (hotkey_status_set(true) < 0 ||
3743 hotkey_mask_set(hotkey_acpi_mask) < 0)
3744 printk(TPACPI_ERR
3745 "error while attempting to reset the event "
3746 "firmware interface\n");
3747
3748 tpacpi_send_radiosw_update();
3749 hotkey_tablet_mode_notify_change();
3750 hotkey_wakeup_reason_notify_change();
3751 hotkey_wakeup_hotunplug_complete_notify_change();
3752 hotkey_poll_setup_safe(false);
3753 }
3754
3755 /* procfs -------------------------------------------------------------- */
3756 static int hotkey_read(struct seq_file *m)
3757 {
3758 int res, status;
3759
3760 if (!tp_features.hotkey) {
3761 seq_printf(m, "status:\t\tnot supported\n");
3762 return 0;
3763 }
3764
3765 if (mutex_lock_killable(&hotkey_mutex))
3766 return -ERESTARTSYS;
3767 res = hotkey_status_get(&status);
3768 if (!res)
3769 res = hotkey_mask_get();
3770 mutex_unlock(&hotkey_mutex);
3771 if (res)
3772 return res;
3773
3774 seq_printf(m, "status:\t\t%s\n", enabled(status, 0));
3775 if (hotkey_all_mask) {
3776 seq_printf(m, "mask:\t\t0x%08x\n", hotkey_user_mask);
3777 seq_printf(m, "commands:\tenable, disable, reset, <mask>\n");
3778 } else {
3779 seq_printf(m, "mask:\t\tnot supported\n");
3780 seq_printf(m, "commands:\tenable, disable, reset\n");
3781 }
3782
3783 return 0;
3784 }
3785
3786 static void hotkey_enabledisable_warn(bool enable)
3787 {
3788 tpacpi_log_usertask("procfs hotkey enable/disable");
3789 if (!WARN((tpacpi_lifecycle == TPACPI_LIFE_RUNNING || !enable),
3790 TPACPI_WARN
3791 "hotkey enable/disable functionality has been "
3792 "removed from the driver. Hotkeys are always "
3793 "enabled\n"))
3794 printk(TPACPI_ERR
3795 "Please remove the hotkey=enable module "
3796 "parameter, it is deprecated. Hotkeys are always "
3797 "enabled\n");
3798 }
3799
3800 static int hotkey_write(char *buf)
3801 {
3802 int res;
3803 u32 mask;
3804 char *cmd;
3805
3806 if (!tp_features.hotkey)
3807 return -ENODEV;
3808
3809 if (mutex_lock_killable(&hotkey_mutex))
3810 return -ERESTARTSYS;
3811
3812 mask = hotkey_user_mask;
3813
3814 res = 0;
3815 while ((cmd = next_cmd(&buf))) {
3816 if (strlencmp(cmd, "enable") == 0) {
3817 hotkey_enabledisable_warn(1);
3818 } else if (strlencmp(cmd, "disable") == 0) {
3819 hotkey_enabledisable_warn(0);
3820 res = -EPERM;
3821 } else if (strlencmp(cmd, "reset") == 0) {
3822 mask = (hotkey_all_mask | hotkey_source_mask)
3823 & ~hotkey_reserved_mask;
3824 } else if (sscanf(cmd, "0x%x", &mask) == 1) {
3825 /* mask set */
3826 } else if (sscanf(cmd, "%x", &mask) == 1) {
3827 /* mask set */
3828 } else {
3829 res = -EINVAL;
3830 goto errexit;
3831 }
3832 }
3833
3834 if (!res) {
3835 tpacpi_disclose_usertask("procfs hotkey",
3836 "set mask to 0x%08x\n", mask);
3837 res = hotkey_user_mask_set(mask);
3838 }
3839
3840 errexit:
3841 mutex_unlock(&hotkey_mutex);
3842 return res;
3843 }
3844
3845 static const struct acpi_device_id ibm_htk_device_ids[] = {
3846 {TPACPI_ACPI_HKEY_HID, 0},
3847 {"", 0},
3848 };
3849
3850 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver = {
3851 .hid = ibm_htk_device_ids,
3852 .notify = hotkey_notify,
3853 .handle = &hkey_handle,
3854 .type = ACPI_DEVICE_NOTIFY,
3855 };
3856
3857 static struct ibm_struct hotkey_driver_data = {
3858 .name = "hotkey",
3859 .read = hotkey_read,
3860 .write = hotkey_write,
3861 .exit = hotkey_exit,
3862 .resume = hotkey_resume,
3863 .suspend = hotkey_suspend,
3864 .acpi = &ibm_hotkey_acpidriver,
3865 };
3866
3867 /*************************************************************************
3868 * Bluetooth subdriver
3869 */
3870
3871 enum {
3872 /* ACPI GBDC/SBDC bits */
3873 TP_ACPI_BLUETOOTH_HWPRESENT = 0x01, /* Bluetooth hw available */
3874 TP_ACPI_BLUETOOTH_RADIOSSW = 0x02, /* Bluetooth radio enabled */
3875 TP_ACPI_BLUETOOTH_RESUMECTRL = 0x04, /* Bluetooth state at resume:
3876 off / last state */
3877 };
3878
3879 enum {
3880 /* ACPI \BLTH commands */
3881 TP_ACPI_BLTH_GET_ULTRAPORT_ID = 0x00, /* Get Ultraport BT ID */
3882 TP_ACPI_BLTH_GET_PWR_ON_RESUME = 0x01, /* Get power-on-resume state */
3883 TP_ACPI_BLTH_PWR_ON_ON_RESUME = 0x02, /* Resume powered on */
3884 TP_ACPI_BLTH_PWR_OFF_ON_RESUME = 0x03, /* Resume powered off */
3885 TP_ACPI_BLTH_SAVE_STATE = 0x05, /* Save state for S4/S5 */
3886 };
3887
3888 #define TPACPI_RFK_BLUETOOTH_SW_NAME "tpacpi_bluetooth_sw"
3889
3890 static int bluetooth_get_status(void)
3891 {
3892 int status;
3893
3894 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3895 if (dbg_bluetoothemul)
3896 return (tpacpi_bluetooth_emulstate) ?
3897 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
3898 #endif
3899
3900 if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
3901 return -EIO;
3902
3903 return ((status & TP_ACPI_BLUETOOTH_RADIOSSW) != 0) ?
3904 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
3905 }
3906
3907 static int bluetooth_set_status(enum tpacpi_rfkill_state state)
3908 {
3909 int status;
3910
3911 vdbg_printk(TPACPI_DBG_RFKILL,
3912 "will attempt to %s bluetooth\n",
3913 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable");
3914
3915 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3916 if (dbg_bluetoothemul) {
3917 tpacpi_bluetooth_emulstate = (state == TPACPI_RFK_RADIO_ON);
3918 return 0;
3919 }
3920 #endif
3921
3922 /* We make sure to keep TP_ACPI_BLUETOOTH_RESUMECTRL off */
3923 status = TP_ACPI_BLUETOOTH_RESUMECTRL;
3924 if (state == TPACPI_RFK_RADIO_ON)
3925 status |= TP_ACPI_BLUETOOTH_RADIOSSW;
3926
3927 if (!acpi_evalf(hkey_handle, NULL, "SBDC", "vd", status))
3928 return -EIO;
3929
3930 return 0;
3931 }
3932
3933 /* sysfs bluetooth enable ---------------------------------------------- */
3934 static ssize_t bluetooth_enable_show(struct device *dev,
3935 struct device_attribute *attr,
3936 char *buf)
3937 {
3938 return tpacpi_rfk_sysfs_enable_show(TPACPI_RFK_BLUETOOTH_SW_ID,
3939 attr, buf);
3940 }
3941
3942 static ssize_t bluetooth_enable_store(struct device *dev,
3943 struct device_attribute *attr,
3944 const char *buf, size_t count)
3945 {
3946 return tpacpi_rfk_sysfs_enable_store(TPACPI_RFK_BLUETOOTH_SW_ID,
3947 attr, buf, count);
3948 }
3949
3950 static struct device_attribute dev_attr_bluetooth_enable =
3951 __ATTR(bluetooth_enable, S_IWUSR | S_IRUGO,
3952 bluetooth_enable_show, bluetooth_enable_store);
3953
3954 /* --------------------------------------------------------------------- */
3955
3956 static struct attribute *bluetooth_attributes[] = {
3957 &dev_attr_bluetooth_enable.attr,
3958 NULL
3959 };
3960
3961 static const struct attribute_group bluetooth_attr_group = {
3962 .attrs = bluetooth_attributes,
3963 };
3964
3965 static const struct tpacpi_rfk_ops bluetooth_tprfk_ops = {
3966 .get_status = bluetooth_get_status,
3967 .set_status = bluetooth_set_status,
3968 };
3969
3970 static void bluetooth_shutdown(void)
3971 {
3972 /* Order firmware to save current state to NVRAM */
3973 if (!acpi_evalf(NULL, NULL, "\\BLTH", "vd",
3974 TP_ACPI_BLTH_SAVE_STATE))
3975 printk(TPACPI_NOTICE
3976 "failed to save bluetooth state to NVRAM\n");
3977 else
3978 vdbg_printk(TPACPI_DBG_RFKILL,
3979 "bluestooth state saved to NVRAM\n");
3980 }
3981
3982 static void bluetooth_exit(void)
3983 {
3984 sysfs_remove_group(&tpacpi_pdev->dev.kobj,
3985 &bluetooth_attr_group);
3986
3987 tpacpi_destroy_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID);
3988
3989 bluetooth_shutdown();
3990 }
3991
3992 static int __init bluetooth_init(struct ibm_init_struct *iibm)
3993 {
3994 int res;
3995 int status = 0;
3996
3997 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
3998 "initializing bluetooth subdriver\n");
3999
4000 TPACPI_ACPIHANDLE_INIT(hkey);
4001
4002 /* bluetooth not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
4003 G4x, R30, R31, R40e, R50e, T20-22, X20-21 */
4004 tp_features.bluetooth = hkey_handle &&
4005 acpi_evalf(hkey_handle, &status, "GBDC", "qd");
4006
4007 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4008 "bluetooth is %s, status 0x%02x\n",
4009 str_supported(tp_features.bluetooth),
4010 status);
4011
4012 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4013 if (dbg_bluetoothemul) {
4014 tp_features.bluetooth = 1;
4015 printk(TPACPI_INFO
4016 "bluetooth switch emulation enabled\n");
4017 } else
4018 #endif
4019 if (tp_features.bluetooth &&
4020 !(status & TP_ACPI_BLUETOOTH_HWPRESENT)) {
4021 /* no bluetooth hardware present in system */
4022 tp_features.bluetooth = 0;
4023 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4024 "bluetooth hardware not installed\n");
4025 }
4026
4027 if (!tp_features.bluetooth)
4028 return 1;
4029
4030 res = tpacpi_new_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID,
4031 &bluetooth_tprfk_ops,
4032 RFKILL_TYPE_BLUETOOTH,
4033 TPACPI_RFK_BLUETOOTH_SW_NAME,
4034 true);
4035 if (res)
4036 return res;
4037
4038 res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
4039 &bluetooth_attr_group);
4040 if (res) {
4041 tpacpi_destroy_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID);
4042 return res;
4043 }
4044
4045 return 0;
4046 }
4047
4048 /* procfs -------------------------------------------------------------- */
4049 static int bluetooth_read(struct seq_file *m)
4050 {
4051 return tpacpi_rfk_procfs_read(TPACPI_RFK_BLUETOOTH_SW_ID, m);
4052 }
4053
4054 static int bluetooth_write(char *buf)
4055 {
4056 return tpacpi_rfk_procfs_write(TPACPI_RFK_BLUETOOTH_SW_ID, buf);
4057 }
4058
4059 static struct ibm_struct bluetooth_driver_data = {
4060 .name = "bluetooth",
4061 .read = bluetooth_read,
4062 .write = bluetooth_write,
4063 .exit = bluetooth_exit,
4064 .shutdown = bluetooth_shutdown,
4065 };
4066
4067 /*************************************************************************
4068 * Wan subdriver
4069 */
4070
4071 enum {
4072 /* ACPI GWAN/SWAN bits */
4073 TP_ACPI_WANCARD_HWPRESENT = 0x01, /* Wan hw available */
4074 TP_ACPI_WANCARD_RADIOSSW = 0x02, /* Wan radio enabled */
4075 TP_ACPI_WANCARD_RESUMECTRL = 0x04, /* Wan state at resume:
4076 off / last state */
4077 };
4078
4079 #define TPACPI_RFK_WWAN_SW_NAME "tpacpi_wwan_sw"
4080
4081 static int wan_get_status(void)
4082 {
4083 int status;
4084
4085 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4086 if (dbg_wwanemul)
4087 return (tpacpi_wwan_emulstate) ?
4088 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4089 #endif
4090
4091 if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
4092 return -EIO;
4093
4094 return ((status & TP_ACPI_WANCARD_RADIOSSW) != 0) ?
4095 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4096 }
4097
4098 static int wan_set_status(enum tpacpi_rfkill_state state)
4099 {
4100 int status;
4101
4102 vdbg_printk(TPACPI_DBG_RFKILL,
4103 "will attempt to %s wwan\n",
4104 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable");
4105
4106 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4107 if (dbg_wwanemul) {
4108 tpacpi_wwan_emulstate = (state == TPACPI_RFK_RADIO_ON);
4109 return 0;
4110 }
4111 #endif
4112
4113 /* We make sure to set TP_ACPI_WANCARD_RESUMECTRL */
4114 status = TP_ACPI_WANCARD_RESUMECTRL;
4115 if (state == TPACPI_RFK_RADIO_ON)
4116 status |= TP_ACPI_WANCARD_RADIOSSW;
4117
4118 if (!acpi_evalf(hkey_handle, NULL, "SWAN", "vd", status))
4119 return -EIO;
4120
4121 return 0;
4122 }
4123
4124 /* sysfs wan enable ---------------------------------------------------- */
4125 static ssize_t wan_enable_show(struct device *dev,
4126 struct device_attribute *attr,
4127 char *buf)
4128 {
4129 return tpacpi_rfk_sysfs_enable_show(TPACPI_RFK_WWAN_SW_ID,
4130 attr, buf);
4131 }
4132
4133 static ssize_t wan_enable_store(struct device *dev,
4134 struct device_attribute *attr,
4135 const char *buf, size_t count)
4136 {
4137 return tpacpi_rfk_sysfs_enable_store(TPACPI_RFK_WWAN_SW_ID,
4138 attr, buf, count);
4139 }
4140
4141 static struct device_attribute dev_attr_wan_enable =
4142 __ATTR(wwan_enable, S_IWUSR | S_IRUGO,
4143 wan_enable_show, wan_enable_store);
4144
4145 /* --------------------------------------------------------------------- */
4146
4147 static struct attribute *wan_attributes[] = {
4148 &dev_attr_wan_enable.attr,
4149 NULL
4150 };
4151
4152 static const struct attribute_group wan_attr_group = {
4153 .attrs = wan_attributes,
4154 };
4155
4156 static const struct tpacpi_rfk_ops wan_tprfk_ops = {
4157 .get_status = wan_get_status,
4158 .set_status = wan_set_status,
4159 };
4160
4161 static void wan_shutdown(void)
4162 {
4163 /* Order firmware to save current state to NVRAM */
4164 if (!acpi_evalf(NULL, NULL, "\\WGSV", "vd",
4165 TP_ACPI_WGSV_SAVE_STATE))
4166 printk(TPACPI_NOTICE
4167 "failed to save WWAN state to NVRAM\n");
4168 else
4169 vdbg_printk(TPACPI_DBG_RFKILL,
4170 "WWAN state saved to NVRAM\n");
4171 }
4172
4173 static void wan_exit(void)
4174 {
4175 sysfs_remove_group(&tpacpi_pdev->dev.kobj,
4176 &wan_attr_group);
4177
4178 tpacpi_destroy_rfkill(TPACPI_RFK_WWAN_SW_ID);
4179
4180 wan_shutdown();
4181 }
4182
4183 static int __init wan_init(struct ibm_init_struct *iibm)
4184 {
4185 int res;
4186 int status = 0;
4187
4188 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4189 "initializing wan subdriver\n");
4190
4191 TPACPI_ACPIHANDLE_INIT(hkey);
4192
4193 tp_features.wan = hkey_handle &&
4194 acpi_evalf(hkey_handle, &status, "GWAN", "qd");
4195
4196 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4197 "wan is %s, status 0x%02x\n",
4198 str_supported(tp_features.wan),
4199 status);
4200
4201 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4202 if (dbg_wwanemul) {
4203 tp_features.wan = 1;
4204 printk(TPACPI_INFO
4205 "wwan switch emulation enabled\n");
4206 } else
4207 #endif
4208 if (tp_features.wan &&
4209 !(status & TP_ACPI_WANCARD_HWPRESENT)) {
4210 /* no wan hardware present in system */
4211 tp_features.wan = 0;
4212 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4213 "wan hardware not installed\n");
4214 }
4215
4216 if (!tp_features.wan)
4217 return 1;
4218
4219 res = tpacpi_new_rfkill(TPACPI_RFK_WWAN_SW_ID,
4220 &wan_tprfk_ops,
4221 RFKILL_TYPE_WWAN,
4222 TPACPI_RFK_WWAN_SW_NAME,
4223 true);
4224 if (res)
4225 return res;
4226
4227 res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
4228 &wan_attr_group);
4229
4230 if (res) {
4231 tpacpi_destroy_rfkill(TPACPI_RFK_WWAN_SW_ID);
4232 return res;
4233 }
4234
4235 return 0;
4236 }
4237
4238 /* procfs -------------------------------------------------------------- */
4239 static int wan_read(struct seq_file *m)
4240 {
4241 return tpacpi_rfk_procfs_read(TPACPI_RFK_WWAN_SW_ID, m);
4242 }
4243
4244 static int wan_write(char *buf)
4245 {
4246 return tpacpi_rfk_procfs_write(TPACPI_RFK_WWAN_SW_ID, buf);
4247 }
4248
4249 static struct ibm_struct wan_driver_data = {
4250 .name = "wan",
4251 .read = wan_read,
4252 .write = wan_write,
4253 .exit = wan_exit,
4254 .shutdown = wan_shutdown,
4255 };
4256
4257 /*************************************************************************
4258 * UWB subdriver
4259 */
4260
4261 enum {
4262 /* ACPI GUWB/SUWB bits */
4263 TP_ACPI_UWB_HWPRESENT = 0x01, /* UWB hw available */
4264 TP_ACPI_UWB_RADIOSSW = 0x02, /* UWB radio enabled */
4265 };
4266
4267 #define TPACPI_RFK_UWB_SW_NAME "tpacpi_uwb_sw"
4268
4269 static int uwb_get_status(void)
4270 {
4271 int status;
4272
4273 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4274 if (dbg_uwbemul)
4275 return (tpacpi_uwb_emulstate) ?
4276 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4277 #endif
4278
4279 if (!acpi_evalf(hkey_handle, &status, "GUWB", "d"))
4280 return -EIO;
4281
4282 return ((status & TP_ACPI_UWB_RADIOSSW) != 0) ?
4283 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4284 }
4285
4286 static int uwb_set_status(enum tpacpi_rfkill_state state)
4287 {
4288 int status;
4289
4290 vdbg_printk(TPACPI_DBG_RFKILL,
4291 "will attempt to %s UWB\n",
4292 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable");
4293
4294 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4295 if (dbg_uwbemul) {
4296 tpacpi_uwb_emulstate = (state == TPACPI_RFK_RADIO_ON);
4297 return 0;
4298 }
4299 #endif
4300
4301 if (state == TPACPI_RFK_RADIO_ON)
4302 status = TP_ACPI_UWB_RADIOSSW;
4303 else
4304 status = 0;
4305
4306 if (!acpi_evalf(hkey_handle, NULL, "SUWB", "vd", status))
4307 return -EIO;
4308
4309 return 0;
4310 }
4311
4312 /* --------------------------------------------------------------------- */
4313
4314 static const struct tpacpi_rfk_ops uwb_tprfk_ops = {
4315 .get_status = uwb_get_status,
4316 .set_status = uwb_set_status,
4317 };
4318
4319 static void uwb_exit(void)
4320 {
4321 tpacpi_destroy_rfkill(TPACPI_RFK_UWB_SW_ID);
4322 }
4323
4324 static int __init uwb_init(struct ibm_init_struct *iibm)
4325 {
4326 int res;
4327 int status = 0;
4328
4329 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4330 "initializing uwb subdriver\n");
4331
4332 TPACPI_ACPIHANDLE_INIT(hkey);
4333
4334 tp_features.uwb = hkey_handle &&
4335 acpi_evalf(hkey_handle, &status, "GUWB", "qd");
4336
4337 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4338 "uwb is %s, status 0x%02x\n",
4339 str_supported(tp_features.uwb),
4340 status);
4341
4342 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4343 if (dbg_uwbemul) {
4344 tp_features.uwb = 1;
4345 printk(TPACPI_INFO
4346 "uwb switch emulation enabled\n");
4347 } else
4348 #endif
4349 if (tp_features.uwb &&
4350 !(status & TP_ACPI_UWB_HWPRESENT)) {
4351 /* no uwb hardware present in system */
4352 tp_features.uwb = 0;
4353 dbg_printk(TPACPI_DBG_INIT,
4354 "uwb hardware not installed\n");
4355 }
4356
4357 if (!tp_features.uwb)
4358 return 1;
4359
4360 res = tpacpi_new_rfkill(TPACPI_RFK_UWB_SW_ID,
4361 &uwb_tprfk_ops,
4362 RFKILL_TYPE_UWB,
4363 TPACPI_RFK_UWB_SW_NAME,
4364 false);
4365 return res;
4366 }
4367
4368 static struct ibm_struct uwb_driver_data = {
4369 .name = "uwb",
4370 .exit = uwb_exit,
4371 .flags.experimental = 1,
4372 };
4373
4374 /*************************************************************************
4375 * Video subdriver
4376 */
4377
4378 #ifdef CONFIG_THINKPAD_ACPI_VIDEO
4379
4380 enum video_access_mode {
4381 TPACPI_VIDEO_NONE = 0,
4382 TPACPI_VIDEO_570, /* 570 */
4383 TPACPI_VIDEO_770, /* 600e/x, 770e, 770x */
4384 TPACPI_VIDEO_NEW, /* all others */
4385 };
4386
4387 enum { /* video status flags, based on VIDEO_570 */
4388 TP_ACPI_VIDEO_S_LCD = 0x01, /* LCD output enabled */
4389 TP_ACPI_VIDEO_S_CRT = 0x02, /* CRT output enabled */
4390 TP_ACPI_VIDEO_S_DVI = 0x08, /* DVI output enabled */
4391 };
4392
4393 enum { /* TPACPI_VIDEO_570 constants */
4394 TP_ACPI_VIDEO_570_PHSCMD = 0x87, /* unknown magic constant :( */
4395 TP_ACPI_VIDEO_570_PHSMASK = 0x03, /* PHS bits that map to
4396 * video_status_flags */
4397 TP_ACPI_VIDEO_570_PHS2CMD = 0x8b, /* unknown magic constant :( */
4398 TP_ACPI_VIDEO_570_PHS2SET = 0x80, /* unknown magic constant :( */
4399 };
4400
4401 static enum video_access_mode video_supported;
4402 static int video_orig_autosw;
4403
4404 static int video_autosw_get(void);
4405 static int video_autosw_set(int enable);
4406
4407 TPACPI_HANDLE(vid2, root, "\\_SB.PCI0.AGPB.VID"); /* G41 */
4408
4409 static int __init video_init(struct ibm_init_struct *iibm)
4410 {
4411 int ivga;
4412
4413 vdbg_printk(TPACPI_DBG_INIT, "initializing video subdriver\n");
4414
4415 TPACPI_ACPIHANDLE_INIT(vid);
4416 TPACPI_ACPIHANDLE_INIT(vid2);
4417
4418 if (vid2_handle && acpi_evalf(NULL, &ivga, "\\IVGA", "d") && ivga)
4419 /* G41, assume IVGA doesn't change */
4420 vid_handle = vid2_handle;
4421
4422 if (!vid_handle)
4423 /* video switching not supported on R30, R31 */
4424 video_supported = TPACPI_VIDEO_NONE;
4425 else if (acpi_evalf(vid_handle, &video_orig_autosw, "SWIT", "qd"))
4426 /* 570 */
4427 video_supported = TPACPI_VIDEO_570;
4428 else if (acpi_evalf(vid_handle, &video_orig_autosw, "^VADL", "qd"))
4429 /* 600e/x, 770e, 770x */
4430 video_supported = TPACPI_VIDEO_770;
4431 else
4432 /* all others */
4433 video_supported = TPACPI_VIDEO_NEW;
4434
4435 vdbg_printk(TPACPI_DBG_INIT, "video is %s, mode %d\n",
4436 str_supported(video_supported != TPACPI_VIDEO_NONE),
4437 video_supported);
4438
4439 return (video_supported != TPACPI_VIDEO_NONE)? 0 : 1;
4440 }
4441
4442 static void video_exit(void)
4443 {
4444 dbg_printk(TPACPI_DBG_EXIT,
4445 "restoring original video autoswitch mode\n");
4446 if (video_autosw_set(video_orig_autosw))
4447 printk(TPACPI_ERR "error while trying to restore original "
4448 "video autoswitch mode\n");
4449 }
4450
4451 static int video_outputsw_get(void)
4452 {
4453 int status = 0;
4454 int i;
4455
4456 switch (video_supported) {
4457 case TPACPI_VIDEO_570:
4458 if (!acpi_evalf(NULL, &i, "\\_SB.PHS", "dd",
4459 TP_ACPI_VIDEO_570_PHSCMD))
4460 return -EIO;
4461 status = i & TP_ACPI_VIDEO_570_PHSMASK;
4462 break;
4463 case TPACPI_VIDEO_770:
4464 if (!acpi_evalf(NULL, &i, "\\VCDL", "d"))
4465 return -EIO;
4466 if (i)
4467 status |= TP_ACPI_VIDEO_S_LCD;
4468 if (!acpi_evalf(NULL, &i, "\\VCDC", "d"))
4469 return -EIO;
4470 if (i)
4471 status |= TP_ACPI_VIDEO_S_CRT;
4472 break;
4473 case TPACPI_VIDEO_NEW:
4474 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 1) ||
4475 !acpi_evalf(NULL, &i, "\\VCDC", "d"))
4476 return -EIO;
4477 if (i)
4478 status |= TP_ACPI_VIDEO_S_CRT;
4479
4480 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0) ||
4481 !acpi_evalf(NULL, &i, "\\VCDL", "d"))
4482 return -EIO;
4483 if (i)
4484 status |= TP_ACPI_VIDEO_S_LCD;
4485 if (!acpi_evalf(NULL, &i, "\\VCDD", "d"))
4486 return -EIO;
4487 if (i)
4488 status |= TP_ACPI_VIDEO_S_DVI;
4489 break;
4490 default:
4491 return -ENOSYS;
4492 }
4493
4494 return status;
4495 }
4496
4497 static int video_outputsw_set(int status)
4498 {
4499 int autosw;
4500 int res = 0;
4501
4502 switch (video_supported) {
4503 case TPACPI_VIDEO_570:
4504 res = acpi_evalf(NULL, NULL,
4505 "\\_SB.PHS2", "vdd",
4506 TP_ACPI_VIDEO_570_PHS2CMD,
4507 status | TP_ACPI_VIDEO_570_PHS2SET);
4508 break;
4509 case TPACPI_VIDEO_770:
4510 autosw = video_autosw_get();
4511 if (autosw < 0)
4512 return autosw;
4513
4514 res = video_autosw_set(1);
4515 if (res)
4516 return res;
4517 res = acpi_evalf(vid_handle, NULL,
4518 "ASWT", "vdd", status * 0x100, 0);
4519 if (!autosw && video_autosw_set(autosw)) {
4520 printk(TPACPI_ERR
4521 "video auto-switch left enabled due to error\n");
4522 return -EIO;
4523 }
4524 break;
4525 case TPACPI_VIDEO_NEW:
4526 res = acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0x80) &&
4527 acpi_evalf(NULL, NULL, "\\VSDS", "vdd", status, 1);
4528 break;
4529 default:
4530 return -ENOSYS;
4531 }
4532
4533 return (res)? 0 : -EIO;
4534 }
4535
4536 static int video_autosw_get(void)
4537 {
4538 int autosw = 0;
4539
4540 switch (video_supported) {
4541 case TPACPI_VIDEO_570:
4542 if (!acpi_evalf(vid_handle, &autosw, "SWIT", "d"))
4543 return -EIO;
4544 break;
4545 case TPACPI_VIDEO_770:
4546 case TPACPI_VIDEO_NEW:
4547 if (!acpi_evalf(vid_handle, &autosw, "^VDEE", "d"))
4548 return -EIO;
4549 break;
4550 default:
4551 return -ENOSYS;
4552 }
4553
4554 return autosw & 1;
4555 }
4556
4557 static int video_autosw_set(int enable)
4558 {
4559 if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", (enable)? 1 : 0))
4560 return -EIO;
4561 return 0;
4562 }
4563
4564 static int video_outputsw_cycle(void)
4565 {
4566 int autosw = video_autosw_get();
4567 int res;
4568
4569 if (autosw < 0)
4570 return autosw;
4571
4572 switch (video_supported) {
4573 case TPACPI_VIDEO_570:
4574 res = video_autosw_set(1);
4575 if (res)
4576 return res;
4577 res = acpi_evalf(ec_handle, NULL, "_Q16", "v");
4578 break;
4579 case TPACPI_VIDEO_770:
4580 case TPACPI_VIDEO_NEW:
4581 res = video_autosw_set(1);
4582 if (res)
4583 return res;
4584 res = acpi_evalf(vid_handle, NULL, "VSWT", "v");
4585 break;
4586 default:
4587 return -ENOSYS;
4588 }
4589 if (!autosw && video_autosw_set(autosw)) {
4590 printk(TPACPI_ERR
4591 "video auto-switch left enabled due to error\n");
4592 return -EIO;
4593 }
4594
4595 return (res)? 0 : -EIO;
4596 }
4597
4598 static int video_expand_toggle(void)
4599 {
4600 switch (video_supported) {
4601 case TPACPI_VIDEO_570:
4602 return acpi_evalf(ec_handle, NULL, "_Q17", "v")?
4603 0 : -EIO;
4604 case TPACPI_VIDEO_770:
4605 return acpi_evalf(vid_handle, NULL, "VEXP", "v")?
4606 0 : -EIO;
4607 case TPACPI_VIDEO_NEW:
4608 return acpi_evalf(NULL, NULL, "\\VEXP", "v")?
4609 0 : -EIO;
4610 default:
4611 return -ENOSYS;
4612 }
4613 /* not reached */
4614 }
4615
4616 static int video_read(struct seq_file *m)
4617 {
4618 int status, autosw;
4619
4620 if (video_supported == TPACPI_VIDEO_NONE) {
4621 seq_printf(m, "status:\t\tnot supported\n");
4622 return 0;
4623 }
4624
4625 status = video_outputsw_get();
4626 if (status < 0)
4627 return status;
4628
4629 autosw = video_autosw_get();
4630 if (autosw < 0)
4631 return autosw;
4632
4633 seq_printf(m, "status:\t\tsupported\n");
4634 seq_printf(m, "lcd:\t\t%s\n", enabled(status, 0));
4635 seq_printf(m, "crt:\t\t%s\n", enabled(status, 1));
4636 if (video_supported == TPACPI_VIDEO_NEW)
4637 seq_printf(m, "dvi:\t\t%s\n", enabled(status, 3));
4638 seq_printf(m, "auto:\t\t%s\n", enabled(autosw, 0));
4639 seq_printf(m, "commands:\tlcd_enable, lcd_disable\n");
4640 seq_printf(m, "commands:\tcrt_enable, crt_disable\n");
4641 if (video_supported == TPACPI_VIDEO_NEW)
4642 seq_printf(m, "commands:\tdvi_enable, dvi_disable\n");
4643 seq_printf(m, "commands:\tauto_enable, auto_disable\n");
4644 seq_printf(m, "commands:\tvideo_switch, expand_toggle\n");
4645
4646 return 0;
4647 }
4648
4649 static int video_write(char *buf)
4650 {
4651 char *cmd;
4652 int enable, disable, status;
4653 int res;
4654
4655 if (video_supported == TPACPI_VIDEO_NONE)
4656 return -ENODEV;
4657
4658 enable = 0;
4659 disable = 0;
4660
4661 while ((cmd = next_cmd(&buf))) {
4662 if (strlencmp(cmd, "lcd_enable") == 0) {
4663 enable |= TP_ACPI_VIDEO_S_LCD;
4664 } else if (strlencmp(cmd, "lcd_disable") == 0) {
4665 disable |= TP_ACPI_VIDEO_S_LCD;
4666 } else if (strlencmp(cmd, "crt_enable") == 0) {
4667 enable |= TP_ACPI_VIDEO_S_CRT;
4668 } else if (strlencmp(cmd, "crt_disable") == 0) {
4669 disable |= TP_ACPI_VIDEO_S_CRT;
4670 } else if (video_supported == TPACPI_VIDEO_NEW &&
4671 strlencmp(cmd, "dvi_enable") == 0) {
4672 enable |= TP_ACPI_VIDEO_S_DVI;
4673 } else if (video_supported == TPACPI_VIDEO_NEW &&
4674 strlencmp(cmd, "dvi_disable") == 0) {
4675 disable |= TP_ACPI_VIDEO_S_DVI;
4676 } else if (strlencmp(cmd, "auto_enable") == 0) {
4677 res = video_autosw_set(1);
4678 if (res)
4679 return res;
4680 } else if (strlencmp(cmd, "auto_disable") == 0) {
4681 res = video_autosw_set(0);
4682 if (res)
4683 return res;
4684 } else if (strlencmp(cmd, "video_switch") == 0) {
4685 res = video_outputsw_cycle();
4686 if (res)
4687 return res;
4688 } else if (strlencmp(cmd, "expand_toggle") == 0) {
4689 res = video_expand_toggle();
4690 if (res)
4691 return res;
4692 } else
4693 return -EINVAL;
4694 }
4695
4696 if (enable || disable) {
4697 status = video_outputsw_get();
4698 if (status < 0)
4699 return status;
4700 res = video_outputsw_set((status & ~disable) | enable);
4701 if (res)
4702 return res;
4703 }
4704
4705 return 0;
4706 }
4707
4708 static struct ibm_struct video_driver_data = {
4709 .name = "video",
4710 .read = video_read,
4711 .write = video_write,
4712 .exit = video_exit,
4713 };
4714
4715 #endif /* CONFIG_THINKPAD_ACPI_VIDEO */
4716
4717 /*************************************************************************
4718 * Light (thinklight) subdriver
4719 */
4720
4721 TPACPI_HANDLE(lght, root, "\\LGHT"); /* A21e, A2xm/p, T20-22, X20-21 */
4722 TPACPI_HANDLE(ledb, ec, "LEDB"); /* G4x */
4723
4724 static int light_get_status(void)
4725 {
4726 int status = 0;
4727
4728 if (tp_features.light_status) {
4729 if (!acpi_evalf(ec_handle, &status, "KBLT", "d"))
4730 return -EIO;
4731 return (!!status);
4732 }
4733
4734 return -ENXIO;
4735 }
4736
4737 static int light_set_status(int status)
4738 {
4739 int rc;
4740
4741 if (tp_features.light) {
4742 if (cmos_handle) {
4743 rc = acpi_evalf(cmos_handle, NULL, NULL, "vd",
4744 (status)?
4745 TP_CMOS_THINKLIGHT_ON :
4746 TP_CMOS_THINKLIGHT_OFF);
4747 } else {
4748 rc = acpi_evalf(lght_handle, NULL, NULL, "vd",
4749 (status)? 1 : 0);
4750 }
4751 return (rc)? 0 : -EIO;
4752 }
4753
4754 return -ENXIO;
4755 }
4756
4757 static void light_set_status_worker(struct work_struct *work)
4758 {
4759 struct tpacpi_led_classdev *data =
4760 container_of(work, struct tpacpi_led_classdev, work);
4761
4762 if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING))
4763 light_set_status((data->new_state != TPACPI_LED_OFF));
4764 }
4765
4766 static void light_sysfs_set(struct led_classdev *led_cdev,
4767 enum led_brightness brightness)
4768 {
4769 struct tpacpi_led_classdev *data =
4770 container_of(led_cdev,
4771 struct tpacpi_led_classdev,
4772 led_classdev);
4773 data->new_state = (brightness != LED_OFF) ?
4774 TPACPI_LED_ON : TPACPI_LED_OFF;
4775 queue_work(tpacpi_wq, &data->work);
4776 }
4777
4778 static enum led_brightness light_sysfs_get(struct led_classdev *led_cdev)
4779 {
4780 return (light_get_status() == 1)? LED_FULL : LED_OFF;
4781 }
4782
4783 static struct tpacpi_led_classdev tpacpi_led_thinklight = {
4784 .led_classdev = {
4785 .name = "tpacpi::thinklight",
4786 .brightness_set = &light_sysfs_set,
4787 .brightness_get = &light_sysfs_get,
4788 }
4789 };
4790
4791 static int __init light_init(struct ibm_init_struct *iibm)
4792 {
4793 int rc;
4794
4795 vdbg_printk(TPACPI_DBG_INIT, "initializing light subdriver\n");
4796
4797 TPACPI_ACPIHANDLE_INIT(ledb);
4798 TPACPI_ACPIHANDLE_INIT(lght);
4799 TPACPI_ACPIHANDLE_INIT(cmos);
4800 INIT_WORK(&tpacpi_led_thinklight.work, light_set_status_worker);
4801
4802 /* light not supported on 570, 600e/x, 770e, 770x, G4x, R30, R31 */
4803 tp_features.light = (cmos_handle || lght_handle) && !ledb_handle;
4804
4805 if (tp_features.light)
4806 /* light status not supported on
4807 570, 600e/x, 770e, 770x, G4x, R30, R31, R32, X20 */
4808 tp_features.light_status =
4809 acpi_evalf(ec_handle, NULL, "KBLT", "qv");
4810
4811 vdbg_printk(TPACPI_DBG_INIT, "light is %s, light status is %s\n",
4812 str_supported(tp_features.light),
4813 str_supported(tp_features.light_status));
4814
4815 if (!tp_features.light)
4816 return 1;
4817
4818 rc = led_classdev_register(&tpacpi_pdev->dev,
4819 &tpacpi_led_thinklight.led_classdev);
4820
4821 if (rc < 0) {
4822 tp_features.light = 0;
4823 tp_features.light_status = 0;
4824 } else {
4825 rc = 0;
4826 }
4827
4828 return rc;
4829 }
4830
4831 static void light_exit(void)
4832 {
4833 led_classdev_unregister(&tpacpi_led_thinklight.led_classdev);
4834 if (work_pending(&tpacpi_led_thinklight.work))
4835 flush_workqueue(tpacpi_wq);
4836 }
4837
4838 static int light_read(struct seq_file *m)
4839 {
4840 int status;
4841
4842 if (!tp_features.light) {
4843 seq_printf(m, "status:\t\tnot supported\n");
4844 } else if (!tp_features.light_status) {
4845 seq_printf(m, "status:\t\tunknown\n");
4846 seq_printf(m, "commands:\ton, off\n");
4847 } else {
4848 status = light_get_status();
4849 if (status < 0)
4850 return status;
4851 seq_printf(m, "status:\t\t%s\n", onoff(status, 0));
4852 seq_printf(m, "commands:\ton, off\n");
4853 }
4854
4855 return 0;
4856 }
4857
4858 static int light_write(char *buf)
4859 {
4860 char *cmd;
4861 int newstatus = 0;
4862
4863 if (!tp_features.light)
4864 return -ENODEV;
4865
4866 while ((cmd = next_cmd(&buf))) {
4867 if (strlencmp(cmd, "on") == 0) {
4868 newstatus = 1;
4869 } else if (strlencmp(cmd, "off") == 0) {
4870 newstatus = 0;
4871 } else
4872 return -EINVAL;
4873 }
4874
4875 return light_set_status(newstatus);
4876 }
4877
4878 static struct ibm_struct light_driver_data = {
4879 .name = "light",
4880 .read = light_read,
4881 .write = light_write,
4882 .exit = light_exit,
4883 };
4884
4885 /*************************************************************************
4886 * CMOS subdriver
4887 */
4888
4889 /* sysfs cmos_command -------------------------------------------------- */
4890 static ssize_t cmos_command_store(struct device *dev,
4891 struct device_attribute *attr,
4892 const char *buf, size_t count)
4893 {
4894 unsigned long cmos_cmd;
4895 int res;
4896
4897 if (parse_strtoul(buf, 21, &cmos_cmd))
4898 return -EINVAL;
4899
4900 res = issue_thinkpad_cmos_command(cmos_cmd);
4901 return (res)? res : count;
4902 }
4903
4904 static struct device_attribute dev_attr_cmos_command =
4905 __ATTR(cmos_command, S_IWUSR, NULL, cmos_command_store);
4906
4907 /* --------------------------------------------------------------------- */
4908
4909 static int __init cmos_init(struct ibm_init_struct *iibm)
4910 {
4911 int res;
4912
4913 vdbg_printk(TPACPI_DBG_INIT,
4914 "initializing cmos commands subdriver\n");
4915
4916 TPACPI_ACPIHANDLE_INIT(cmos);
4917
4918 vdbg_printk(TPACPI_DBG_INIT, "cmos commands are %s\n",
4919 str_supported(cmos_handle != NULL));
4920
4921 res = device_create_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
4922 if (res)
4923 return res;
4924
4925 return (cmos_handle)? 0 : 1;
4926 }
4927
4928 static void cmos_exit(void)
4929 {
4930 device_remove_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
4931 }
4932
4933 static int cmos_read(struct seq_file *m)
4934 {
4935 /* cmos not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
4936 R30, R31, T20-22, X20-21 */
4937 if (!cmos_handle)
4938 seq_printf(m, "status:\t\tnot supported\n");
4939 else {
4940 seq_printf(m, "status:\t\tsupported\n");
4941 seq_printf(m, "commands:\t<cmd> (<cmd> is 0-21)\n");
4942 }
4943
4944 return 0;
4945 }
4946
4947 static int cmos_write(char *buf)
4948 {
4949 char *cmd;
4950 int cmos_cmd, res;
4951
4952 while ((cmd = next_cmd(&buf))) {
4953 if (sscanf(cmd, "%u", &cmos_cmd) == 1 &&
4954 cmos_cmd >= 0 && cmos_cmd <= 21) {
4955 /* cmos_cmd set */
4956 } else
4957 return -EINVAL;
4958
4959 res = issue_thinkpad_cmos_command(cmos_cmd);
4960 if (res)
4961 return res;
4962 }
4963
4964 return 0;
4965 }
4966
4967 static struct ibm_struct cmos_driver_data = {
4968 .name = "cmos",
4969 .read = cmos_read,
4970 .write = cmos_write,
4971 .exit = cmos_exit,
4972 };
4973
4974 /*************************************************************************
4975 * LED subdriver
4976 */
4977
4978 enum led_access_mode {
4979 TPACPI_LED_NONE = 0,
4980 TPACPI_LED_570, /* 570 */
4981 TPACPI_LED_OLD, /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
4982 TPACPI_LED_NEW, /* all others */
4983 };
4984
4985 enum { /* For TPACPI_LED_OLD */
4986 TPACPI_LED_EC_HLCL = 0x0c, /* EC reg to get led to power on */
4987 TPACPI_LED_EC_HLBL = 0x0d, /* EC reg to blink a lit led */
4988 TPACPI_LED_EC_HLMS = 0x0e, /* EC reg to select led to command */
4989 };
4990
4991 static enum led_access_mode led_supported;
4992
4993 TPACPI_HANDLE(led, ec, "SLED", /* 570 */
4994 "SYSL", /* 600e/x, 770e, 770x, A21e, A2xm/p, */
4995 /* T20-22, X20-21 */
4996 "LED", /* all others */
4997 ); /* R30, R31 */
4998
4999 #define TPACPI_LED_NUMLEDS 16
5000 static struct tpacpi_led_classdev *tpacpi_leds;
5001 static enum led_status_t tpacpi_led_state_cache[TPACPI_LED_NUMLEDS];
5002 static const char * const tpacpi_led_names[TPACPI_LED_NUMLEDS] = {
5003 /* there's a limit of 19 chars + NULL before 2.6.26 */
5004 "tpacpi::power",
5005 "tpacpi:orange:batt",
5006 "tpacpi:green:batt",
5007 "tpacpi::dock_active",
5008 "tpacpi::bay_active",
5009 "tpacpi::dock_batt",
5010 "tpacpi::unknown_led",
5011 "tpacpi::standby",
5012 "tpacpi::dock_status1",
5013 "tpacpi::dock_status2",
5014 "tpacpi::unknown_led2",
5015 "tpacpi::unknown_led3",
5016 "tpacpi::thinkvantage",
5017 };
5018 #define TPACPI_SAFE_LEDS 0x1081U
5019
5020 static inline bool tpacpi_is_led_restricted(const unsigned int led)
5021 {
5022 #ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS
5023 return false;
5024 #else
5025 return (1U & (TPACPI_SAFE_LEDS >> led)) == 0;
5026 #endif
5027 }
5028
5029 static int led_get_status(const unsigned int led)
5030 {
5031 int status;
5032 enum led_status_t led_s;
5033
5034 switch (led_supported) {
5035 case TPACPI_LED_570:
5036 if (!acpi_evalf(ec_handle,
5037 &status, "GLED", "dd", 1 << led))
5038 return -EIO;
5039 led_s = (status == 0)?
5040 TPACPI_LED_OFF :
5041 ((status == 1)?
5042 TPACPI_LED_ON :
5043 TPACPI_LED_BLINK);
5044 tpacpi_led_state_cache[led] = led_s;
5045 return led_s;
5046 default:
5047 return -ENXIO;
5048 }
5049
5050 /* not reached */
5051 }
5052
5053 static int led_set_status(const unsigned int led,
5054 const enum led_status_t ledstatus)
5055 {
5056 /* off, on, blink. Index is led_status_t */
5057 static const unsigned int led_sled_arg1[] = { 0, 1, 3 };
5058 static const unsigned int led_led_arg1[] = { 0, 0x80, 0xc0 };
5059
5060 int rc = 0;
5061
5062 switch (led_supported) {
5063 case TPACPI_LED_570:
5064 /* 570 */
5065 if (unlikely(led > 7))
5066 return -EINVAL;
5067 if (unlikely(tpacpi_is_led_restricted(led)))
5068 return -EPERM;
5069 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
5070 (1 << led), led_sled_arg1[ledstatus]))
5071 rc = -EIO;
5072 break;
5073 case TPACPI_LED_OLD:
5074 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */
5075 if (unlikely(led > 7))
5076 return -EINVAL;
5077 if (unlikely(tpacpi_is_led_restricted(led)))
5078 return -EPERM;
5079 rc = ec_write(TPACPI_LED_EC_HLMS, (1 << led));
5080 if (rc >= 0)
5081 rc = ec_write(TPACPI_LED_EC_HLBL,
5082 (ledstatus == TPACPI_LED_BLINK) << led);
5083 if (rc >= 0)
5084 rc = ec_write(TPACPI_LED_EC_HLCL,
5085 (ledstatus != TPACPI_LED_OFF) << led);
5086 break;
5087 case TPACPI_LED_NEW:
5088 /* all others */
5089 if (unlikely(led >= TPACPI_LED_NUMLEDS))
5090 return -EINVAL;
5091 if (unlikely(tpacpi_is_led_restricted(led)))
5092 return -EPERM;
5093 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
5094 led, led_led_arg1[ledstatus]))
5095 rc = -EIO;
5096 break;
5097 default:
5098 rc = -ENXIO;
5099 }
5100
5101 if (!rc)
5102 tpacpi_led_state_cache[led] = ledstatus;
5103
5104 return rc;
5105 }
5106
5107 static void led_set_status_worker(struct work_struct *work)
5108 {
5109 struct tpacpi_led_classdev *data =
5110 container_of(work, struct tpacpi_led_classdev, work);
5111
5112 if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING))
5113 led_set_status(data->led, data->new_state);
5114 }
5115
5116 static void led_sysfs_set(struct led_classdev *led_cdev,
5117 enum led_brightness brightness)
5118 {
5119 struct tpacpi_led_classdev *data = container_of(led_cdev,
5120 struct tpacpi_led_classdev, led_classdev);
5121
5122 if (brightness == LED_OFF)
5123 data->new_state = TPACPI_LED_OFF;
5124 else if (tpacpi_led_state_cache[data->led] != TPACPI_LED_BLINK)
5125 data->new_state = TPACPI_LED_ON;
5126 else
5127 data->new_state = TPACPI_LED_BLINK;
5128
5129 queue_work(tpacpi_wq, &data->work);
5130 }
5131
5132 static int led_sysfs_blink_set(struct led_classdev *led_cdev,
5133 unsigned long *delay_on, unsigned long *delay_off)
5134 {
5135 struct tpacpi_led_classdev *data = container_of(led_cdev,
5136 struct tpacpi_led_classdev, led_classdev);
5137
5138 /* Can we choose the flash rate? */
5139 if (*delay_on == 0 && *delay_off == 0) {
5140 /* yes. set them to the hardware blink rate (1 Hz) */
5141 *delay_on = 500; /* ms */
5142 *delay_off = 500; /* ms */
5143 } else if ((*delay_on != 500) || (*delay_off != 500))
5144 return -EINVAL;
5145
5146 data->new_state = TPACPI_LED_BLINK;
5147 queue_work(tpacpi_wq, &data->work);
5148
5149 return 0;
5150 }
5151
5152 static enum led_brightness led_sysfs_get(struct led_classdev *led_cdev)
5153 {
5154 int rc;
5155
5156 struct tpacpi_led_classdev *data = container_of(led_cdev,
5157 struct tpacpi_led_classdev, led_classdev);
5158
5159 rc = led_get_status(data->led);
5160
5161 if (rc == TPACPI_LED_OFF || rc < 0)
5162 rc = LED_OFF; /* no error handling in led class :( */
5163 else
5164 rc = LED_FULL;
5165
5166 return rc;
5167 }
5168
5169 static void led_exit(void)
5170 {
5171 unsigned int i;
5172
5173 for (i = 0; i < TPACPI_LED_NUMLEDS; i++) {
5174 if (tpacpi_leds[i].led_classdev.name)
5175 led_classdev_unregister(&tpacpi_leds[i].led_classdev);
5176 }
5177
5178 kfree(tpacpi_leds);
5179 }
5180
5181 static int __init tpacpi_init_led(unsigned int led)
5182 {
5183 int rc;
5184
5185 tpacpi_leds[led].led = led;
5186
5187 /* LEDs with no name don't get registered */
5188 if (!tpacpi_led_names[led])
5189 return 0;
5190
5191 tpacpi_leds[led].led_classdev.brightness_set = &led_sysfs_set;
5192 tpacpi_leds[led].led_classdev.blink_set = &led_sysfs_blink_set;
5193 if (led_supported == TPACPI_LED_570)
5194 tpacpi_leds[led].led_classdev.brightness_get =
5195 &led_sysfs_get;
5196
5197 tpacpi_leds[led].led_classdev.name = tpacpi_led_names[led];
5198
5199 INIT_WORK(&tpacpi_leds[led].work, led_set_status_worker);
5200
5201 rc = led_classdev_register(&tpacpi_pdev->dev,
5202 &tpacpi_leds[led].led_classdev);
5203 if (rc < 0)
5204 tpacpi_leds[led].led_classdev.name = NULL;
5205
5206 return rc;
5207 }
5208
5209 static const struct tpacpi_quirk led_useful_qtable[] __initconst = {
5210 TPACPI_Q_IBM('1', 'E', 0x009f), /* A30 */
5211 TPACPI_Q_IBM('1', 'N', 0x009f), /* A31 */
5212 TPACPI_Q_IBM('1', 'G', 0x009f), /* A31 */
5213
5214 TPACPI_Q_IBM('1', 'I', 0x0097), /* T30 */
5215 TPACPI_Q_IBM('1', 'R', 0x0097), /* T40, T41, T42, R50, R51 */
5216 TPACPI_Q_IBM('7', '0', 0x0097), /* T43, R52 */
5217 TPACPI_Q_IBM('1', 'Y', 0x0097), /* T43 */
5218 TPACPI_Q_IBM('1', 'W', 0x0097), /* R50e */
5219 TPACPI_Q_IBM('1', 'V', 0x0097), /* R51 */
5220 TPACPI_Q_IBM('7', '8', 0x0097), /* R51e */
5221 TPACPI_Q_IBM('7', '6', 0x0097), /* R52 */
5222
5223 TPACPI_Q_IBM('1', 'K', 0x00bf), /* X30 */
5224 TPACPI_Q_IBM('1', 'Q', 0x00bf), /* X31, X32 */
5225 TPACPI_Q_IBM('1', 'U', 0x00bf), /* X40 */
5226 TPACPI_Q_IBM('7', '4', 0x00bf), /* X41 */
5227 TPACPI_Q_IBM('7', '5', 0x00bf), /* X41t */
5228
5229 TPACPI_Q_IBM('7', '9', 0x1f97), /* T60 (1) */
5230 TPACPI_Q_IBM('7', '7', 0x1f97), /* Z60* (1) */
5231 TPACPI_Q_IBM('7', 'F', 0x1f97), /* Z61* (1) */
5232 TPACPI_Q_IBM('7', 'B', 0x1fb7), /* X60 (1) */
5233
5234 /* (1) - may have excess leds enabled on MSB */
5235
5236 /* Defaults (order matters, keep last, don't reorder!) */
5237 { /* Lenovo */
5238 .vendor = PCI_VENDOR_ID_LENOVO,
5239 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY,
5240 .quirks = 0x1fffU,
5241 },
5242 { /* IBM ThinkPads with no EC version string */
5243 .vendor = PCI_VENDOR_ID_IBM,
5244 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_UNKNOWN,
5245 .quirks = 0x00ffU,
5246 },
5247 { /* IBM ThinkPads with EC version string */
5248 .vendor = PCI_VENDOR_ID_IBM,
5249 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY,
5250 .quirks = 0x00bfU,
5251 },
5252 };
5253
5254 #undef TPACPI_LEDQ_IBM
5255 #undef TPACPI_LEDQ_LNV
5256
5257 static int __init led_init(struct ibm_init_struct *iibm)
5258 {
5259 unsigned int i;
5260 int rc;
5261 unsigned long useful_leds;
5262
5263 vdbg_printk(TPACPI_DBG_INIT, "initializing LED subdriver\n");
5264
5265 TPACPI_ACPIHANDLE_INIT(led);
5266
5267 if (!led_handle)
5268 /* led not supported on R30, R31 */
5269 led_supported = TPACPI_LED_NONE;
5270 else if (strlencmp(led_path, "SLED") == 0)
5271 /* 570 */
5272 led_supported = TPACPI_LED_570;
5273 else if (strlencmp(led_path, "SYSL") == 0)
5274 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
5275 led_supported = TPACPI_LED_OLD;
5276 else
5277 /* all others */
5278 led_supported = TPACPI_LED_NEW;
5279
5280 vdbg_printk(TPACPI_DBG_INIT, "LED commands are %s, mode %d\n",
5281 str_supported(led_supported), led_supported);
5282
5283 if (led_supported == TPACPI_LED_NONE)
5284 return 1;
5285
5286 tpacpi_leds = kzalloc(sizeof(*tpacpi_leds) * TPACPI_LED_NUMLEDS,
5287 GFP_KERNEL);
5288 if (!tpacpi_leds) {
5289 printk(TPACPI_ERR "Out of memory for LED data\n");
5290 return -ENOMEM;
5291 }
5292
5293 useful_leds = tpacpi_check_quirks(led_useful_qtable,
5294 ARRAY_SIZE(led_useful_qtable));
5295
5296 for (i = 0; i < TPACPI_LED_NUMLEDS; i++) {
5297 if (!tpacpi_is_led_restricted(i) &&
5298 test_bit(i, &useful_leds)) {
5299 rc = tpacpi_init_led(i);
5300 if (rc < 0) {
5301 led_exit();
5302 return rc;
5303 }
5304 }
5305 }
5306
5307 #ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS
5308 printk(TPACPI_NOTICE
5309 "warning: userspace override of important "
5310 "firmware LEDs is enabled\n");
5311 #endif
5312 return 0;
5313 }
5314
5315 #define str_led_status(s) \
5316 ((s) == TPACPI_LED_OFF ? "off" : \
5317 ((s) == TPACPI_LED_ON ? "on" : "blinking"))
5318
5319 static int led_read(struct seq_file *m)
5320 {
5321 if (!led_supported) {
5322 seq_printf(m, "status:\t\tnot supported\n");
5323 return 0;
5324 }
5325 seq_printf(m, "status:\t\tsupported\n");
5326
5327 if (led_supported == TPACPI_LED_570) {
5328 /* 570 */
5329 int i, status;
5330 for (i = 0; i < 8; i++) {
5331 status = led_get_status(i);
5332 if (status < 0)
5333 return -EIO;
5334 seq_printf(m, "%d:\t\t%s\n",
5335 i, str_led_status(status));
5336 }
5337 }
5338
5339 seq_printf(m, "commands:\t"
5340 "<led> on, <led> off, <led> blink (<led> is 0-15)\n");
5341
5342 return 0;
5343 }
5344
5345 static int led_write(char *buf)
5346 {
5347 char *cmd;
5348 int led, rc;
5349 enum led_status_t s;
5350
5351 if (!led_supported)
5352 return -ENODEV;
5353
5354 while ((cmd = next_cmd(&buf))) {
5355 if (sscanf(cmd, "%d", &led) != 1 || led < 0 || led > 15)
5356 return -EINVAL;
5357
5358 if (strstr(cmd, "off")) {
5359 s = TPACPI_LED_OFF;
5360 } else if (strstr(cmd, "on")) {
5361 s = TPACPI_LED_ON;
5362 } else if (strstr(cmd, "blink")) {
5363 s = TPACPI_LED_BLINK;
5364 } else {
5365 return -EINVAL;
5366 }
5367
5368 rc = led_set_status(led, s);
5369 if (rc < 0)
5370 return rc;
5371 }
5372
5373 return 0;
5374 }
5375
5376 static struct ibm_struct led_driver_data = {
5377 .name = "led",
5378 .read = led_read,
5379 .write = led_write,
5380 .exit = led_exit,
5381 };
5382
5383 /*************************************************************************
5384 * Beep subdriver
5385 */
5386
5387 TPACPI_HANDLE(beep, ec, "BEEP"); /* all except R30, R31 */
5388
5389 #define TPACPI_BEEP_Q1 0x0001
5390
5391 static const struct tpacpi_quirk beep_quirk_table[] __initconst = {
5392 TPACPI_Q_IBM('I', 'M', TPACPI_BEEP_Q1), /* 570 */
5393 TPACPI_Q_IBM('I', 'U', TPACPI_BEEP_Q1), /* 570E - unverified */
5394 };
5395
5396 static int __init beep_init(struct ibm_init_struct *iibm)
5397 {
5398 unsigned long quirks;
5399
5400 vdbg_printk(TPACPI_DBG_INIT, "initializing beep subdriver\n");
5401
5402 TPACPI_ACPIHANDLE_INIT(beep);
5403
5404 vdbg_printk(TPACPI_DBG_INIT, "beep is %s\n",
5405 str_supported(beep_handle != NULL));
5406
5407 quirks = tpacpi_check_quirks(beep_quirk_table,
5408 ARRAY_SIZE(beep_quirk_table));
5409
5410 tp_features.beep_needs_two_args = !!(quirks & TPACPI_BEEP_Q1);
5411
5412 return (beep_handle)? 0 : 1;
5413 }
5414
5415 static int beep_read(struct seq_file *m)
5416 {
5417 if (!beep_handle)
5418 seq_printf(m, "status:\t\tnot supported\n");
5419 else {
5420 seq_printf(m, "status:\t\tsupported\n");
5421 seq_printf(m, "commands:\t<cmd> (<cmd> is 0-17)\n");
5422 }
5423
5424 return 0;
5425 }
5426
5427 static int beep_write(char *buf)
5428 {
5429 char *cmd;
5430 int beep_cmd;
5431
5432 if (!beep_handle)
5433 return -ENODEV;
5434
5435 while ((cmd = next_cmd(&buf))) {
5436 if (sscanf(cmd, "%u", &beep_cmd) == 1 &&
5437 beep_cmd >= 0 && beep_cmd <= 17) {
5438 /* beep_cmd set */
5439 } else
5440 return -EINVAL;
5441 if (tp_features.beep_needs_two_args) {
5442 if (!acpi_evalf(beep_handle, NULL, NULL, "vdd",
5443 beep_cmd, 0))
5444 return -EIO;
5445 } else {
5446 if (!acpi_evalf(beep_handle, NULL, NULL, "vd",
5447 beep_cmd))
5448 return -EIO;
5449 }
5450 }
5451
5452 return 0;
5453 }
5454
5455 static struct ibm_struct beep_driver_data = {
5456 .name = "beep",
5457 .read = beep_read,
5458 .write = beep_write,
5459 };
5460
5461 /*************************************************************************
5462 * Thermal subdriver
5463 */
5464
5465 enum thermal_access_mode {
5466 TPACPI_THERMAL_NONE = 0, /* No thermal support */
5467 TPACPI_THERMAL_ACPI_TMP07, /* Use ACPI TMP0-7 */
5468 TPACPI_THERMAL_ACPI_UPDT, /* Use ACPI TMP0-7 with UPDT */
5469 TPACPI_THERMAL_TPEC_8, /* Use ACPI EC regs, 8 sensors */
5470 TPACPI_THERMAL_TPEC_16, /* Use ACPI EC regs, 16 sensors */
5471 };
5472
5473 enum { /* TPACPI_THERMAL_TPEC_* */
5474 TP_EC_THERMAL_TMP0 = 0x78, /* ACPI EC regs TMP 0..7 */
5475 TP_EC_THERMAL_TMP8 = 0xC0, /* ACPI EC regs TMP 8..15 */
5476 TP_EC_THERMAL_TMP_NA = -128, /* ACPI EC sensor not available */
5477
5478 TPACPI_THERMAL_SENSOR_NA = -128000, /* Sensor not available */
5479 };
5480
5481
5482 #define TPACPI_MAX_THERMAL_SENSORS 16 /* Max thermal sensors supported */
5483 struct ibm_thermal_sensors_struct {
5484 s32 temp[TPACPI_MAX_THERMAL_SENSORS];
5485 };
5486
5487 static enum thermal_access_mode thermal_read_mode;
5488
5489 /* idx is zero-based */
5490 static int thermal_get_sensor(int idx, s32 *value)
5491 {
5492 int t;
5493 s8 tmp;
5494 char tmpi[5];
5495
5496 t = TP_EC_THERMAL_TMP0;
5497
5498 switch (thermal_read_mode) {
5499 #if TPACPI_MAX_THERMAL_SENSORS >= 16
5500 case TPACPI_THERMAL_TPEC_16:
5501 if (idx >= 8 && idx <= 15) {
5502 t = TP_EC_THERMAL_TMP8;
5503 idx -= 8;
5504 }
5505 /* fallthrough */
5506 #endif
5507 case TPACPI_THERMAL_TPEC_8:
5508 if (idx <= 7) {
5509 if (!acpi_ec_read(t + idx, &tmp))
5510 return -EIO;
5511 *value = tmp * 1000;
5512 return 0;
5513 }
5514 break;
5515
5516 case TPACPI_THERMAL_ACPI_UPDT:
5517 if (idx <= 7) {
5518 snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
5519 if (!acpi_evalf(ec_handle, NULL, "UPDT", "v"))
5520 return -EIO;
5521 if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
5522 return -EIO;
5523 *value = (t - 2732) * 100;
5524 return 0;
5525 }
5526 break;
5527
5528 case TPACPI_THERMAL_ACPI_TMP07:
5529 if (idx <= 7) {
5530 snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
5531 if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
5532 return -EIO;
5533 if (t > 127 || t < -127)
5534 t = TP_EC_THERMAL_TMP_NA;
5535 *value = t * 1000;
5536 return 0;
5537 }
5538 break;
5539
5540 case TPACPI_THERMAL_NONE:
5541 default:
5542 return -ENOSYS;
5543 }
5544
5545 return -EINVAL;
5546 }
5547
5548 static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s)
5549 {
5550 int res, i;
5551 int n;
5552
5553 n = 8;
5554 i = 0;
5555
5556 if (!s)
5557 return -EINVAL;
5558
5559 if (thermal_read_mode == TPACPI_THERMAL_TPEC_16)
5560 n = 16;
5561
5562 for (i = 0 ; i < n; i++) {
5563 res = thermal_get_sensor(i, &s->temp[i]);
5564 if (res)
5565 return res;
5566 }
5567
5568 return n;
5569 }
5570
5571 static void thermal_dump_all_sensors(void)
5572 {
5573 int n, i;
5574 struct ibm_thermal_sensors_struct t;
5575
5576 n = thermal_get_sensors(&t);
5577 if (n <= 0)
5578 return;
5579
5580 printk(TPACPI_NOTICE
5581 "temperatures (Celsius):");
5582
5583 for (i = 0; i < n; i++) {
5584 if (t.temp[i] != TPACPI_THERMAL_SENSOR_NA)
5585 printk(KERN_CONT " %d", (int)(t.temp[i] / 1000));
5586 else
5587 printk(KERN_CONT " N/A");
5588 }
5589
5590 printk(KERN_CONT "\n");
5591 }
5592
5593 /* sysfs temp##_input -------------------------------------------------- */
5594
5595 static ssize_t thermal_temp_input_show(struct device *dev,
5596 struct device_attribute *attr,
5597 char *buf)
5598 {
5599 struct sensor_device_attribute *sensor_attr =
5600 to_sensor_dev_attr(attr);
5601 int idx = sensor_attr->index;
5602 s32 value;
5603 int res;
5604
5605 res = thermal_get_sensor(idx, &value);
5606 if (res)
5607 return res;
5608 if (value == TPACPI_THERMAL_SENSOR_NA)
5609 return -ENXIO;
5610
5611 return snprintf(buf, PAGE_SIZE, "%d\n", value);
5612 }
5613
5614 #define THERMAL_SENSOR_ATTR_TEMP(_idxA, _idxB) \
5615 SENSOR_ATTR(temp##_idxA##_input, S_IRUGO, \
5616 thermal_temp_input_show, NULL, _idxB)
5617
5618 static struct sensor_device_attribute sensor_dev_attr_thermal_temp_input[] = {
5619 THERMAL_SENSOR_ATTR_TEMP(1, 0),
5620 THERMAL_SENSOR_ATTR_TEMP(2, 1),
5621 THERMAL_SENSOR_ATTR_TEMP(3, 2),
5622 THERMAL_SENSOR_ATTR_TEMP(4, 3),
5623 THERMAL_SENSOR_ATTR_TEMP(5, 4),
5624 THERMAL_SENSOR_ATTR_TEMP(6, 5),
5625 THERMAL_SENSOR_ATTR_TEMP(7, 6),
5626 THERMAL_SENSOR_ATTR_TEMP(8, 7),
5627 THERMAL_SENSOR_ATTR_TEMP(9, 8),
5628 THERMAL_SENSOR_ATTR_TEMP(10, 9),
5629 THERMAL_SENSOR_ATTR_TEMP(11, 10),
5630 THERMAL_SENSOR_ATTR_TEMP(12, 11),
5631 THERMAL_SENSOR_ATTR_TEMP(13, 12),
5632 THERMAL_SENSOR_ATTR_TEMP(14, 13),
5633 THERMAL_SENSOR_ATTR_TEMP(15, 14),
5634 THERMAL_SENSOR_ATTR_TEMP(16, 15),
5635 };
5636
5637 #define THERMAL_ATTRS(X) \
5638 &sensor_dev_attr_thermal_temp_input[X].dev_attr.attr
5639
5640 static struct attribute *thermal_temp_input_attr[] = {
5641 THERMAL_ATTRS(8),
5642 THERMAL_ATTRS(9),
5643 THERMAL_ATTRS(10),
5644 THERMAL_ATTRS(11),
5645 THERMAL_ATTRS(12),
5646 THERMAL_ATTRS(13),
5647 THERMAL_ATTRS(14),
5648 THERMAL_ATTRS(15),
5649 THERMAL_ATTRS(0),
5650 THERMAL_ATTRS(1),
5651 THERMAL_ATTRS(2),
5652 THERMAL_ATTRS(3),
5653 THERMAL_ATTRS(4),
5654 THERMAL_ATTRS(5),
5655 THERMAL_ATTRS(6),
5656 THERMAL_ATTRS(7),
5657 NULL
5658 };
5659
5660 static const struct attribute_group thermal_temp_input16_group = {
5661 .attrs = thermal_temp_input_attr
5662 };
5663
5664 static const struct attribute_group thermal_temp_input8_group = {
5665 .attrs = &thermal_temp_input_attr[8]
5666 };
5667
5668 #undef THERMAL_SENSOR_ATTR_TEMP
5669 #undef THERMAL_ATTRS
5670
5671 /* --------------------------------------------------------------------- */
5672
5673 static int __init thermal_init(struct ibm_init_struct *iibm)
5674 {
5675 u8 t, ta1, ta2;
5676 int i;
5677 int acpi_tmp7;
5678 int res;
5679
5680 vdbg_printk(TPACPI_DBG_INIT, "initializing thermal subdriver\n");
5681
5682 acpi_tmp7 = acpi_evalf(ec_handle, NULL, "TMP7", "qv");
5683
5684 if (thinkpad_id.ec_model) {
5685 /*
5686 * Direct EC access mode: sensors at registers
5687 * 0x78-0x7F, 0xC0-0xC7. Registers return 0x00 for
5688 * non-implemented, thermal sensors return 0x80 when
5689 * not available
5690 */
5691
5692 ta1 = ta2 = 0;
5693 for (i = 0; i < 8; i++) {
5694 if (acpi_ec_read(TP_EC_THERMAL_TMP0 + i, &t)) {
5695 ta1 |= t;
5696 } else {
5697 ta1 = 0;
5698 break;
5699 }
5700 if (acpi_ec_read(TP_EC_THERMAL_TMP8 + i, &t)) {
5701 ta2 |= t;
5702 } else {
5703 ta1 = 0;
5704 break;
5705 }
5706 }
5707 if (ta1 == 0) {
5708 /* This is sheer paranoia, but we handle it anyway */
5709 if (acpi_tmp7) {
5710 printk(TPACPI_ERR
5711 "ThinkPad ACPI EC access misbehaving, "
5712 "falling back to ACPI TMPx access "
5713 "mode\n");
5714 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
5715 } else {
5716 printk(TPACPI_ERR
5717 "ThinkPad ACPI EC access misbehaving, "
5718 "disabling thermal sensors access\n");
5719 thermal_read_mode = TPACPI_THERMAL_NONE;
5720 }
5721 } else {
5722 thermal_read_mode =
5723 (ta2 != 0) ?
5724 TPACPI_THERMAL_TPEC_16 : TPACPI_THERMAL_TPEC_8;
5725 }
5726 } else if (acpi_tmp7) {
5727 if (acpi_evalf(ec_handle, NULL, "UPDT", "qv")) {
5728 /* 600e/x, 770e, 770x */
5729 thermal_read_mode = TPACPI_THERMAL_ACPI_UPDT;
5730 } else {
5731 /* Standard ACPI TMPx access, max 8 sensors */
5732 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
5733 }
5734 } else {
5735 /* temperatures not supported on 570, G4x, R30, R31, R32 */
5736 thermal_read_mode = TPACPI_THERMAL_NONE;
5737 }
5738
5739 vdbg_printk(TPACPI_DBG_INIT, "thermal is %s, mode %d\n",
5740 str_supported(thermal_read_mode != TPACPI_THERMAL_NONE),
5741 thermal_read_mode);
5742
5743 switch (thermal_read_mode) {
5744 case TPACPI_THERMAL_TPEC_16:
5745 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
5746 &thermal_temp_input16_group);
5747 if (res)
5748 return res;
5749 break;
5750 case TPACPI_THERMAL_TPEC_8:
5751 case TPACPI_THERMAL_ACPI_TMP07:
5752 case TPACPI_THERMAL_ACPI_UPDT:
5753 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
5754 &thermal_temp_input8_group);
5755 if (res)
5756 return res;
5757 break;
5758 case TPACPI_THERMAL_NONE:
5759 default:
5760 return 1;
5761 }
5762
5763 return 0;
5764 }
5765
5766 static void thermal_exit(void)
5767 {
5768 switch (thermal_read_mode) {
5769 case TPACPI_THERMAL_TPEC_16:
5770 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
5771 &thermal_temp_input16_group);
5772 break;
5773 case TPACPI_THERMAL_TPEC_8:
5774 case TPACPI_THERMAL_ACPI_TMP07:
5775 case TPACPI_THERMAL_ACPI_UPDT:
5776 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
5777 &thermal_temp_input16_group);
5778 break;
5779 case TPACPI_THERMAL_NONE:
5780 default:
5781 break;
5782 }
5783 }
5784
5785 static int thermal_read(struct seq_file *m)
5786 {
5787 int n, i;
5788 struct ibm_thermal_sensors_struct t;
5789
5790 n = thermal_get_sensors(&t);
5791 if (unlikely(n < 0))
5792 return n;
5793
5794 seq_printf(m, "temperatures:\t");
5795
5796 if (n > 0) {
5797 for (i = 0; i < (n - 1); i++)
5798 seq_printf(m, "%d ", t.temp[i] / 1000);
5799 seq_printf(m, "%d\n", t.temp[i] / 1000);
5800 } else
5801 seq_printf(m, "not supported\n");
5802
5803 return 0;
5804 }
5805
5806 static struct ibm_struct thermal_driver_data = {
5807 .name = "thermal",
5808 .read = thermal_read,
5809 .exit = thermal_exit,
5810 };
5811
5812 /*************************************************************************
5813 * EC Dump subdriver
5814 */
5815
5816 static u8 ecdump_regs[256];
5817
5818 static int ecdump_read(struct seq_file *m)
5819 {
5820 int i, j;
5821 u8 v;
5822
5823 seq_printf(m, "EC "
5824 " +00 +01 +02 +03 +04 +05 +06 +07"
5825 " +08 +09 +0a +0b +0c +0d +0e +0f\n");
5826 for (i = 0; i < 256; i += 16) {
5827 seq_printf(m, "EC 0x%02x:", i);
5828 for (j = 0; j < 16; j++) {
5829 if (!acpi_ec_read(i + j, &v))
5830 break;
5831 if (v != ecdump_regs[i + j])
5832 seq_printf(m, " *%02x", v);
5833 else
5834 seq_printf(m, " %02x", v);
5835 ecdump_regs[i + j] = v;
5836 }
5837 seq_putc(m, '\n');
5838 if (j != 16)
5839 break;
5840 }
5841
5842 /* These are way too dangerous to advertise openly... */
5843 #if 0
5844 seq_printf(m, "commands:\t0x<offset> 0x<value>"
5845 " (<offset> is 00-ff, <value> is 00-ff)\n");
5846 seq_printf(m, "commands:\t0x<offset> <value> "
5847 " (<offset> is 00-ff, <value> is 0-255)\n");
5848 #endif
5849 return 0;
5850 }
5851
5852 static int ecdump_write(char *buf)
5853 {
5854 char *cmd;
5855 int i, v;
5856
5857 while ((cmd = next_cmd(&buf))) {
5858 if (sscanf(cmd, "0x%x 0x%x", &i, &v) == 2) {
5859 /* i and v set */
5860 } else if (sscanf(cmd, "0x%x %u", &i, &v) == 2) {
5861 /* i and v set */
5862 } else
5863 return -EINVAL;
5864 if (i >= 0 && i < 256 && v >= 0 && v < 256) {
5865 if (!acpi_ec_write(i, v))
5866 return -EIO;
5867 } else
5868 return -EINVAL;
5869 }
5870
5871 return 0;
5872 }
5873
5874 static struct ibm_struct ecdump_driver_data = {
5875 .name = "ecdump",
5876 .read = ecdump_read,
5877 .write = ecdump_write,
5878 .flags.experimental = 1,
5879 };
5880
5881 /*************************************************************************
5882 * Backlight/brightness subdriver
5883 */
5884
5885 #define TPACPI_BACKLIGHT_DEV_NAME "thinkpad_screen"
5886
5887 /*
5888 * ThinkPads can read brightness from two places: EC HBRV (0x31), or
5889 * CMOS NVRAM byte 0x5E, bits 0-3.
5890 *
5891 * EC HBRV (0x31) has the following layout
5892 * Bit 7: unknown function
5893 * Bit 6: unknown function
5894 * Bit 5: Z: honour scale changes, NZ: ignore scale changes
5895 * Bit 4: must be set to zero to avoid problems
5896 * Bit 3-0: backlight brightness level
5897 *
5898 * brightness_get_raw returns status data in the HBRV layout
5899 *
5900 * WARNING: The X61 has been verified to use HBRV for something else, so
5901 * this should be used _only_ on IBM ThinkPads, and maybe with some careful
5902 * testing on the very early *60 Lenovo models...
5903 */
5904
5905 enum {
5906 TP_EC_BACKLIGHT = 0x31,
5907
5908 /* TP_EC_BACKLIGHT bitmasks */
5909 TP_EC_BACKLIGHT_LVLMSK = 0x1F,
5910 TP_EC_BACKLIGHT_CMDMSK = 0xE0,
5911 TP_EC_BACKLIGHT_MAPSW = 0x20,
5912 };
5913
5914 enum tpacpi_brightness_access_mode {
5915 TPACPI_BRGHT_MODE_AUTO = 0, /* Not implemented yet */
5916 TPACPI_BRGHT_MODE_EC, /* EC control */
5917 TPACPI_BRGHT_MODE_UCMS_STEP, /* UCMS step-based control */
5918 TPACPI_BRGHT_MODE_ECNVRAM, /* EC control w/ NVRAM store */
5919 TPACPI_BRGHT_MODE_MAX
5920 };
5921
5922 static struct backlight_device *ibm_backlight_device;
5923
5924 static enum tpacpi_brightness_access_mode brightness_mode =
5925 TPACPI_BRGHT_MODE_MAX;
5926
5927 static unsigned int brightness_enable = 2; /* 2 = auto, 0 = no, 1 = yes */
5928
5929 static struct mutex brightness_mutex;
5930
5931 /* NVRAM brightness access,
5932 * call with brightness_mutex held! */
5933 static unsigned int tpacpi_brightness_nvram_get(void)
5934 {
5935 u8 lnvram;
5936
5937 lnvram = (nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS)
5938 & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
5939 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
5940 lnvram &= (tp_features.bright_16levels) ? 0x0f : 0x07;
5941
5942 return lnvram;
5943 }
5944
5945 static void tpacpi_brightness_checkpoint_nvram(void)
5946 {
5947 u8 lec = 0;
5948 u8 b_nvram;
5949
5950 if (brightness_mode != TPACPI_BRGHT_MODE_ECNVRAM)
5951 return;
5952
5953 vdbg_printk(TPACPI_DBG_BRGHT,
5954 "trying to checkpoint backlight level to NVRAM...\n");
5955
5956 if (mutex_lock_killable(&brightness_mutex) < 0)
5957 return;
5958
5959 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
5960 goto unlock;
5961 lec &= TP_EC_BACKLIGHT_LVLMSK;
5962 b_nvram = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS);
5963
5964 if (lec != ((b_nvram & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
5965 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS)) {
5966 /* NVRAM needs update */
5967 b_nvram &= ~(TP_NVRAM_MASK_LEVEL_BRIGHTNESS <<
5968 TP_NVRAM_POS_LEVEL_BRIGHTNESS);
5969 b_nvram |= lec;
5970 nvram_write_byte(b_nvram, TP_NVRAM_ADDR_BRIGHTNESS);
5971 dbg_printk(TPACPI_DBG_BRGHT,
5972 "updated NVRAM backlight level to %u (0x%02x)\n",
5973 (unsigned int) lec, (unsigned int) b_nvram);
5974 } else
5975 vdbg_printk(TPACPI_DBG_BRGHT,
5976 "NVRAM backlight level already is %u (0x%02x)\n",
5977 (unsigned int) lec, (unsigned int) b_nvram);
5978
5979 unlock:
5980 mutex_unlock(&brightness_mutex);
5981 }
5982
5983
5984 /* call with brightness_mutex held! */
5985 static int tpacpi_brightness_get_raw(int *status)
5986 {
5987 u8 lec = 0;
5988
5989 switch (brightness_mode) {
5990 case TPACPI_BRGHT_MODE_UCMS_STEP:
5991 *status = tpacpi_brightness_nvram_get();
5992 return 0;
5993 case TPACPI_BRGHT_MODE_EC:
5994 case TPACPI_BRGHT_MODE_ECNVRAM:
5995 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
5996 return -EIO;
5997 *status = lec;
5998 return 0;
5999 default:
6000 return -ENXIO;
6001 }
6002 }
6003
6004 /* call with brightness_mutex held! */
6005 /* do NOT call with illegal backlight level value */
6006 static int tpacpi_brightness_set_ec(unsigned int value)
6007 {
6008 u8 lec = 0;
6009
6010 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
6011 return -EIO;
6012
6013 if (unlikely(!acpi_ec_write(TP_EC_BACKLIGHT,
6014 (lec & TP_EC_BACKLIGHT_CMDMSK) |
6015 (value & TP_EC_BACKLIGHT_LVLMSK))))
6016 return -EIO;
6017
6018 return 0;
6019 }
6020
6021 /* call with brightness_mutex held! */
6022 static int tpacpi_brightness_set_ucmsstep(unsigned int value)
6023 {
6024 int cmos_cmd, inc;
6025 unsigned int current_value, i;
6026
6027 current_value = tpacpi_brightness_nvram_get();
6028
6029 if (value == current_value)
6030 return 0;
6031
6032 cmos_cmd = (value > current_value) ?
6033 TP_CMOS_BRIGHTNESS_UP :
6034 TP_CMOS_BRIGHTNESS_DOWN;
6035 inc = (value > current_value) ? 1 : -1;
6036
6037 for (i = current_value; i != value; i += inc)
6038 if (issue_thinkpad_cmos_command(cmos_cmd))
6039 return -EIO;
6040
6041 return 0;
6042 }
6043
6044 /* May return EINTR which can always be mapped to ERESTARTSYS */
6045 static int brightness_set(unsigned int value)
6046 {
6047 int res;
6048
6049 if (value > ((tp_features.bright_16levels)? 15 : 7) ||
6050 value < 0)
6051 return -EINVAL;
6052
6053 vdbg_printk(TPACPI_DBG_BRGHT,
6054 "set backlight level to %d\n", value);
6055
6056 res = mutex_lock_killable(&brightness_mutex);
6057 if (res < 0)
6058 return res;
6059
6060 switch (brightness_mode) {
6061 case TPACPI_BRGHT_MODE_EC:
6062 case TPACPI_BRGHT_MODE_ECNVRAM:
6063 res = tpacpi_brightness_set_ec(value);
6064 break;
6065 case TPACPI_BRGHT_MODE_UCMS_STEP:
6066 res = tpacpi_brightness_set_ucmsstep(value);
6067 break;
6068 default:
6069 res = -ENXIO;
6070 }
6071
6072 mutex_unlock(&brightness_mutex);
6073 return res;
6074 }
6075
6076 /* sysfs backlight class ----------------------------------------------- */
6077
6078 static int brightness_update_status(struct backlight_device *bd)
6079 {
6080 unsigned int level =
6081 (bd->props.fb_blank == FB_BLANK_UNBLANK &&
6082 bd->props.power == FB_BLANK_UNBLANK) ?
6083 bd->props.brightness : 0;
6084
6085 dbg_printk(TPACPI_DBG_BRGHT,
6086 "backlight: attempt to set level to %d\n",
6087 level);
6088
6089 /* it is the backlight class's job (caller) to handle
6090 * EINTR and other errors properly */
6091 return brightness_set(level);
6092 }
6093
6094 static int brightness_get(struct backlight_device *bd)
6095 {
6096 int status, res;
6097
6098 res = mutex_lock_killable(&brightness_mutex);
6099 if (res < 0)
6100 return 0;
6101
6102 res = tpacpi_brightness_get_raw(&status);
6103
6104 mutex_unlock(&brightness_mutex);
6105
6106 if (res < 0)
6107 return 0;
6108
6109 return status & TP_EC_BACKLIGHT_LVLMSK;
6110 }
6111
6112 static void tpacpi_brightness_notify_change(void)
6113 {
6114 backlight_force_update(ibm_backlight_device,
6115 BACKLIGHT_UPDATE_HOTKEY);
6116 }
6117
6118 static struct backlight_ops ibm_backlight_data = {
6119 .get_brightness = brightness_get,
6120 .update_status = brightness_update_status,
6121 };
6122
6123 /* --------------------------------------------------------------------- */
6124
6125 /*
6126 * These are only useful for models that have only one possibility
6127 * of GPU. If the BIOS model handles both ATI and Intel, don't use
6128 * these quirks.
6129 */
6130 #define TPACPI_BRGHT_Q_NOEC 0x0001 /* Must NOT use EC HBRV */
6131 #define TPACPI_BRGHT_Q_EC 0x0002 /* Should or must use EC HBRV */
6132 #define TPACPI_BRGHT_Q_ASK 0x8000 /* Ask for user report */
6133
6134 static const struct tpacpi_quirk brightness_quirk_table[] __initconst = {
6135 /* Models with ATI GPUs known to require ECNVRAM mode */
6136 TPACPI_Q_IBM('1', 'Y', TPACPI_BRGHT_Q_EC), /* T43/p ATI */
6137
6138 /* Models with ATI GPUs that can use ECNVRAM */
6139 TPACPI_Q_IBM('1', 'R', TPACPI_BRGHT_Q_EC),
6140 TPACPI_Q_IBM('1', 'Q', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
6141 TPACPI_Q_IBM('7', '6', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
6142 TPACPI_Q_IBM('7', '8', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
6143
6144 /* Models with Intel Extreme Graphics 2 */
6145 TPACPI_Q_IBM('1', 'U', TPACPI_BRGHT_Q_NOEC),
6146 TPACPI_Q_IBM('1', 'V', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
6147 TPACPI_Q_IBM('1', 'W', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
6148
6149 /* Models with Intel GMA900 */
6150 TPACPI_Q_IBM('7', '0', TPACPI_BRGHT_Q_NOEC), /* T43, R52 */
6151 TPACPI_Q_IBM('7', '4', TPACPI_BRGHT_Q_NOEC), /* X41 */
6152 TPACPI_Q_IBM('7', '5', TPACPI_BRGHT_Q_NOEC), /* X41 Tablet */
6153 };
6154
6155 static int __init brightness_init(struct ibm_init_struct *iibm)
6156 {
6157 int b;
6158 unsigned long quirks;
6159
6160 vdbg_printk(TPACPI_DBG_INIT, "initializing brightness subdriver\n");
6161
6162 mutex_init(&brightness_mutex);
6163
6164 quirks = tpacpi_check_quirks(brightness_quirk_table,
6165 ARRAY_SIZE(brightness_quirk_table));
6166
6167 /*
6168 * We always attempt to detect acpi support, so as to switch
6169 * Lenovo Vista BIOS to ACPI brightness mode even if we are not
6170 * going to publish a backlight interface
6171 */
6172 b = tpacpi_check_std_acpi_brightness_support();
6173 if (b > 0) {
6174
6175 if (acpi_video_backlight_support()) {
6176 if (brightness_enable > 1) {
6177 printk(TPACPI_NOTICE
6178 "Standard ACPI backlight interface "
6179 "available, not loading native one.\n");
6180 return 1;
6181 } else if (brightness_enable == 1) {
6182 printk(TPACPI_NOTICE
6183 "Backlight control force enabled, even if standard "
6184 "ACPI backlight interface is available\n");
6185 }
6186 } else {
6187 if (brightness_enable > 1) {
6188 printk(TPACPI_NOTICE
6189 "Standard ACPI backlight interface not "
6190 "available, thinkpad_acpi native "
6191 "brightness control enabled\n");
6192 }
6193 }
6194 }
6195
6196 if (!brightness_enable) {
6197 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT,
6198 "brightness support disabled by "
6199 "module parameter\n");
6200 return 1;
6201 }
6202
6203 if (b > 16) {
6204 printk(TPACPI_ERR
6205 "Unsupported brightness interface, "
6206 "please contact %s\n", TPACPI_MAIL);
6207 return 1;
6208 }
6209 if (b == 16)
6210 tp_features.bright_16levels = 1;
6211
6212 /*
6213 * Check for module parameter bogosity, note that we
6214 * init brightness_mode to TPACPI_BRGHT_MODE_MAX in order to be
6215 * able to detect "unspecified"
6216 */
6217 if (brightness_mode > TPACPI_BRGHT_MODE_MAX)
6218 return -EINVAL;
6219
6220 /* TPACPI_BRGHT_MODE_AUTO not implemented yet, just use default */
6221 if (brightness_mode == TPACPI_BRGHT_MODE_AUTO ||
6222 brightness_mode == TPACPI_BRGHT_MODE_MAX) {
6223 if (quirks & TPACPI_BRGHT_Q_EC)
6224 brightness_mode = TPACPI_BRGHT_MODE_ECNVRAM;
6225 else
6226 brightness_mode = TPACPI_BRGHT_MODE_UCMS_STEP;
6227
6228 dbg_printk(TPACPI_DBG_BRGHT,
6229 "driver auto-selected brightness_mode=%d\n",
6230 brightness_mode);
6231 }
6232
6233 /* Safety */
6234 if (thinkpad_id.vendor != PCI_VENDOR_ID_IBM &&
6235 (brightness_mode == TPACPI_BRGHT_MODE_ECNVRAM ||
6236 brightness_mode == TPACPI_BRGHT_MODE_EC))
6237 return -EINVAL;
6238
6239 if (tpacpi_brightness_get_raw(&b) < 0)
6240 return 1;
6241
6242 if (tp_features.bright_16levels)
6243 printk(TPACPI_INFO
6244 "detected a 16-level brightness capable ThinkPad\n");
6245
6246 ibm_backlight_device = backlight_device_register(
6247 TPACPI_BACKLIGHT_DEV_NAME, NULL, NULL,
6248 &ibm_backlight_data);
6249 if (IS_ERR(ibm_backlight_device)) {
6250 int rc = PTR_ERR(ibm_backlight_device);
6251 ibm_backlight_device = NULL;
6252 printk(TPACPI_ERR "Could not register backlight device\n");
6253 return rc;
6254 }
6255 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT,
6256 "brightness is supported\n");
6257
6258 if (quirks & TPACPI_BRGHT_Q_ASK) {
6259 printk(TPACPI_NOTICE
6260 "brightness: will use unverified default: "
6261 "brightness_mode=%d\n", brightness_mode);
6262 printk(TPACPI_NOTICE
6263 "brightness: please report to %s whether it works well "
6264 "or not on your ThinkPad\n", TPACPI_MAIL);
6265 }
6266
6267 ibm_backlight_device->props.max_brightness =
6268 (tp_features.bright_16levels)? 15 : 7;
6269 ibm_backlight_device->props.brightness = b & TP_EC_BACKLIGHT_LVLMSK;
6270 backlight_update_status(ibm_backlight_device);
6271
6272 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT,
6273 "brightness: registering brightness hotkeys "
6274 "as change notification\n");
6275 tpacpi_hotkey_driver_mask_set(hotkey_driver_mask
6276 | TP_ACPI_HKEY_BRGHTUP_MASK
6277 | TP_ACPI_HKEY_BRGHTDWN_MASK);;
6278 return 0;
6279 }
6280
6281 static void brightness_suspend(pm_message_t state)
6282 {
6283 tpacpi_brightness_checkpoint_nvram();
6284 }
6285
6286 static void brightness_shutdown(void)
6287 {
6288 tpacpi_brightness_checkpoint_nvram();
6289 }
6290
6291 static void brightness_exit(void)
6292 {
6293 if (ibm_backlight_device) {
6294 vdbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_BRGHT,
6295 "calling backlight_device_unregister()\n");
6296 backlight_device_unregister(ibm_backlight_device);
6297 }
6298
6299 tpacpi_brightness_checkpoint_nvram();
6300 }
6301
6302 static int brightness_read(struct seq_file *m)
6303 {
6304 int level;
6305
6306 level = brightness_get(NULL);
6307 if (level < 0) {
6308 seq_printf(m, "level:\t\tunreadable\n");
6309 } else {
6310 seq_printf(m, "level:\t\t%d\n", level);
6311 seq_printf(m, "commands:\tup, down\n");
6312 seq_printf(m, "commands:\tlevel <level>"
6313 " (<level> is 0-%d)\n",
6314 (tp_features.bright_16levels) ? 15 : 7);
6315 }
6316
6317 return 0;
6318 }
6319
6320 static int brightness_write(char *buf)
6321 {
6322 int level;
6323 int rc;
6324 char *cmd;
6325 int max_level = (tp_features.bright_16levels) ? 15 : 7;
6326
6327 level = brightness_get(NULL);
6328 if (level < 0)
6329 return level;
6330
6331 while ((cmd = next_cmd(&buf))) {
6332 if (strlencmp(cmd, "up") == 0) {
6333 if (level < max_level)
6334 level++;
6335 } else if (strlencmp(cmd, "down") == 0) {
6336 if (level > 0)
6337 level--;
6338 } else if (sscanf(cmd, "level %d", &level) == 1 &&
6339 level >= 0 && level <= max_level) {
6340 /* new level set */
6341 } else
6342 return -EINVAL;
6343 }
6344
6345 tpacpi_disclose_usertask("procfs brightness",
6346 "set level to %d\n", level);
6347
6348 /*
6349 * Now we know what the final level should be, so we try to set it.
6350 * Doing it this way makes the syscall restartable in case of EINTR
6351 */
6352 rc = brightness_set(level);
6353 if (!rc && ibm_backlight_device)
6354 backlight_force_update(ibm_backlight_device,
6355 BACKLIGHT_UPDATE_SYSFS);
6356 return (rc == -EINTR)? -ERESTARTSYS : rc;
6357 }
6358
6359 static struct ibm_struct brightness_driver_data = {
6360 .name = "brightness",
6361 .read = brightness_read,
6362 .write = brightness_write,
6363 .exit = brightness_exit,
6364 .suspend = brightness_suspend,
6365 .shutdown = brightness_shutdown,
6366 };
6367
6368 /*************************************************************************
6369 * Volume subdriver
6370 */
6371
6372 /*
6373 * IBM ThinkPads have a simple volume controller with MUTE gating.
6374 * Very early Lenovo ThinkPads follow the IBM ThinkPad spec.
6375 *
6376 * Since the *61 series (and probably also the later *60 series), Lenovo
6377 * ThinkPads only implement the MUTE gate.
6378 *
6379 * EC register 0x30
6380 * Bit 6: MUTE (1 mutes sound)
6381 * Bit 3-0: Volume
6382 * Other bits should be zero as far as we know.
6383 *
6384 * This is also stored in CMOS NVRAM, byte 0x60, bit 6 (MUTE), and
6385 * bits 3-0 (volume). Other bits in NVRAM may have other functions,
6386 * such as bit 7 which is used to detect repeated presses of MUTE,
6387 * and we leave them unchanged.
6388 */
6389
6390 #define TPACPI_ALSA_DRVNAME "ThinkPad EC"
6391 #define TPACPI_ALSA_SHRTNAME "ThinkPad Console Audio Control"
6392 #define TPACPI_ALSA_MIXERNAME TPACPI_ALSA_SHRTNAME
6393
6394 static int alsa_index = SNDRV_DEFAULT_IDX1;
6395 static char *alsa_id = "ThinkPadEC";
6396 static int alsa_enable = SNDRV_DEFAULT_ENABLE1;
6397
6398 struct tpacpi_alsa_data {
6399 struct snd_card *card;
6400 struct snd_ctl_elem_id *ctl_mute_id;
6401 struct snd_ctl_elem_id *ctl_vol_id;
6402 };
6403
6404 static struct snd_card *alsa_card;
6405
6406 enum {
6407 TP_EC_AUDIO = 0x30,
6408
6409 /* TP_EC_AUDIO bits */
6410 TP_EC_AUDIO_MUTESW = 6,
6411
6412 /* TP_EC_AUDIO bitmasks */
6413 TP_EC_AUDIO_LVL_MSK = 0x0F,
6414 TP_EC_AUDIO_MUTESW_MSK = (1 << TP_EC_AUDIO_MUTESW),
6415
6416 /* Maximum volume */
6417 TP_EC_VOLUME_MAX = 14,
6418 };
6419
6420 enum tpacpi_volume_access_mode {
6421 TPACPI_VOL_MODE_AUTO = 0, /* Not implemented yet */
6422 TPACPI_VOL_MODE_EC, /* Pure EC control */
6423 TPACPI_VOL_MODE_UCMS_STEP, /* UCMS step-based control: N/A */
6424 TPACPI_VOL_MODE_ECNVRAM, /* EC control w/ NVRAM store */
6425 TPACPI_VOL_MODE_MAX
6426 };
6427
6428 enum tpacpi_volume_capabilities {
6429 TPACPI_VOL_CAP_AUTO = 0, /* Use white/blacklist */
6430 TPACPI_VOL_CAP_VOLMUTE, /* Output vol and mute */
6431 TPACPI_VOL_CAP_MUTEONLY, /* Output mute only */
6432 TPACPI_VOL_CAP_MAX
6433 };
6434
6435 static enum tpacpi_volume_access_mode volume_mode =
6436 TPACPI_VOL_MODE_MAX;
6437
6438 static enum tpacpi_volume_capabilities volume_capabilities;
6439 static int volume_control_allowed;
6440
6441 /*
6442 * Used to syncronize writers to TP_EC_AUDIO and
6443 * TP_NVRAM_ADDR_MIXER, as we need to do read-modify-write
6444 */
6445 static struct mutex volume_mutex;
6446
6447 static void tpacpi_volume_checkpoint_nvram(void)
6448 {
6449 u8 lec = 0;
6450 u8 b_nvram;
6451 u8 ec_mask;
6452
6453 if (volume_mode != TPACPI_VOL_MODE_ECNVRAM)
6454 return;
6455 if (!volume_control_allowed)
6456 return;
6457
6458 vdbg_printk(TPACPI_DBG_MIXER,
6459 "trying to checkpoint mixer state to NVRAM...\n");
6460
6461 if (tp_features.mixer_no_level_control)
6462 ec_mask = TP_EC_AUDIO_MUTESW_MSK;
6463 else
6464 ec_mask = TP_EC_AUDIO_MUTESW_MSK | TP_EC_AUDIO_LVL_MSK;
6465
6466 if (mutex_lock_killable(&volume_mutex) < 0)
6467 return;
6468
6469 if (unlikely(!acpi_ec_read(TP_EC_AUDIO, &lec)))
6470 goto unlock;
6471 lec &= ec_mask;
6472 b_nvram = nvram_read_byte(TP_NVRAM_ADDR_MIXER);
6473
6474 if (lec != (b_nvram & ec_mask)) {
6475 /* NVRAM needs update */
6476 b_nvram &= ~ec_mask;
6477 b_nvram |= lec;
6478 nvram_write_byte(b_nvram, TP_NVRAM_ADDR_MIXER);
6479 dbg_printk(TPACPI_DBG_MIXER,
6480 "updated NVRAM mixer status to 0x%02x (0x%02x)\n",
6481 (unsigned int) lec, (unsigned int) b_nvram);
6482 } else {
6483 vdbg_printk(TPACPI_DBG_MIXER,
6484 "NVRAM mixer status already is 0x%02x (0x%02x)\n",
6485 (unsigned int) lec, (unsigned int) b_nvram);
6486 }
6487
6488 unlock:
6489 mutex_unlock(&volume_mutex);
6490 }
6491
6492 static int volume_get_status_ec(u8 *status)
6493 {
6494 u8 s;
6495
6496 if (!acpi_ec_read(TP_EC_AUDIO, &s))
6497 return -EIO;
6498
6499 *status = s;
6500
6501 dbg_printk(TPACPI_DBG_MIXER, "status 0x%02x\n", s);
6502
6503 return 0;
6504 }
6505
6506 static int volume_get_status(u8 *status)
6507 {
6508 return volume_get_status_ec(status);
6509 }
6510
6511 static int volume_set_status_ec(const u8 status)
6512 {
6513 if (!acpi_ec_write(TP_EC_AUDIO, status))
6514 return -EIO;
6515
6516 dbg_printk(TPACPI_DBG_MIXER, "set EC mixer to 0x%02x\n", status);
6517
6518 return 0;
6519 }
6520
6521 static int volume_set_status(const u8 status)
6522 {
6523 return volume_set_status_ec(status);
6524 }
6525
6526 static int volume_set_mute_ec(const bool mute)
6527 {
6528 int rc;
6529 u8 s, n;
6530
6531 if (mutex_lock_killable(&volume_mutex) < 0)
6532 return -EINTR;
6533
6534 rc = volume_get_status_ec(&s);
6535 if (rc)
6536 goto unlock;
6537
6538 n = (mute) ? s | TP_EC_AUDIO_MUTESW_MSK :
6539 s & ~TP_EC_AUDIO_MUTESW_MSK;
6540
6541 if (n != s)
6542 rc = volume_set_status_ec(n);
6543
6544 unlock:
6545 mutex_unlock(&volume_mutex);
6546 return rc;
6547 }
6548
6549 static int volume_set_mute(const bool mute)
6550 {
6551 dbg_printk(TPACPI_DBG_MIXER, "trying to %smute\n",
6552 (mute) ? "" : "un");
6553 return volume_set_mute_ec(mute);
6554 }
6555
6556 static int volume_set_volume_ec(const u8 vol)
6557 {
6558 int rc;
6559 u8 s, n;
6560
6561 if (vol > TP_EC_VOLUME_MAX)
6562 return -EINVAL;
6563
6564 if (mutex_lock_killable(&volume_mutex) < 0)
6565 return -EINTR;
6566
6567 rc = volume_get_status_ec(&s);
6568 if (rc)
6569 goto unlock;
6570
6571 n = (s & ~TP_EC_AUDIO_LVL_MSK) | vol;
6572
6573 if (n != s)
6574 rc = volume_set_status_ec(n);
6575
6576 unlock:
6577 mutex_unlock(&volume_mutex);
6578 return rc;
6579 }
6580
6581 static int volume_set_volume(const u8 vol)
6582 {
6583 dbg_printk(TPACPI_DBG_MIXER,
6584 "trying to set volume level to %hu\n", vol);
6585 return volume_set_volume_ec(vol);
6586 }
6587
6588 static void volume_alsa_notify_change(void)
6589 {
6590 struct tpacpi_alsa_data *d;
6591
6592 if (alsa_card && alsa_card->private_data) {
6593 d = alsa_card->private_data;
6594 if (d->ctl_mute_id)
6595 snd_ctl_notify(alsa_card,
6596 SNDRV_CTL_EVENT_MASK_VALUE,
6597 d->ctl_mute_id);
6598 if (d->ctl_vol_id)
6599 snd_ctl_notify(alsa_card,
6600 SNDRV_CTL_EVENT_MASK_VALUE,
6601 d->ctl_vol_id);
6602 }
6603 }
6604
6605 static int volume_alsa_vol_info(struct snd_kcontrol *kcontrol,
6606 struct snd_ctl_elem_info *uinfo)
6607 {
6608 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
6609 uinfo->count = 1;
6610 uinfo->value.integer.min = 0;
6611 uinfo->value.integer.max = TP_EC_VOLUME_MAX;
6612 return 0;
6613 }
6614
6615 static int volume_alsa_vol_get(struct snd_kcontrol *kcontrol,
6616 struct snd_ctl_elem_value *ucontrol)
6617 {
6618 u8 s;
6619 int rc;
6620
6621 rc = volume_get_status(&s);
6622 if (rc < 0)
6623 return rc;
6624
6625 ucontrol->value.integer.value[0] = s & TP_EC_AUDIO_LVL_MSK;
6626 return 0;
6627 }
6628
6629 static int volume_alsa_vol_put(struct snd_kcontrol *kcontrol,
6630 struct snd_ctl_elem_value *ucontrol)
6631 {
6632 return volume_set_volume(ucontrol->value.integer.value[0]);
6633 }
6634
6635 #define volume_alsa_mute_info snd_ctl_boolean_mono_info
6636
6637 static int volume_alsa_mute_get(struct snd_kcontrol *kcontrol,
6638 struct snd_ctl_elem_value *ucontrol)
6639 {
6640 u8 s;
6641 int rc;
6642
6643 rc = volume_get_status(&s);
6644 if (rc < 0)
6645 return rc;
6646
6647 ucontrol->value.integer.value[0] =
6648 (s & TP_EC_AUDIO_MUTESW_MSK) ? 0 : 1;
6649 return 0;
6650 }
6651
6652 static int volume_alsa_mute_put(struct snd_kcontrol *kcontrol,
6653 struct snd_ctl_elem_value *ucontrol)
6654 {
6655 return volume_set_mute(!ucontrol->value.integer.value[0]);
6656 }
6657
6658 static struct snd_kcontrol_new volume_alsa_control_vol __devinitdata = {
6659 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
6660 .name = "Console Playback Volume",
6661 .index = 0,
6662 .access = SNDRV_CTL_ELEM_ACCESS_READ,
6663 .info = volume_alsa_vol_info,
6664 .get = volume_alsa_vol_get,
6665 };
6666
6667 static struct snd_kcontrol_new volume_alsa_control_mute __devinitdata = {
6668 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
6669 .name = "Console Playback Switch",
6670 .index = 0,
6671 .access = SNDRV_CTL_ELEM_ACCESS_READ,
6672 .info = volume_alsa_mute_info,
6673 .get = volume_alsa_mute_get,
6674 };
6675
6676 static void volume_suspend(pm_message_t state)
6677 {
6678 tpacpi_volume_checkpoint_nvram();
6679 }
6680
6681 static void volume_resume(void)
6682 {
6683 volume_alsa_notify_change();
6684 }
6685
6686 static void volume_shutdown(void)
6687 {
6688 tpacpi_volume_checkpoint_nvram();
6689 }
6690
6691 static void volume_exit(void)
6692 {
6693 if (alsa_card) {
6694 snd_card_free(alsa_card);
6695 alsa_card = NULL;
6696 }
6697
6698 tpacpi_volume_checkpoint_nvram();
6699 }
6700
6701 static int __init volume_create_alsa_mixer(void)
6702 {
6703 struct snd_card *card;
6704 struct tpacpi_alsa_data *data;
6705 struct snd_kcontrol *ctl_vol;
6706 struct snd_kcontrol *ctl_mute;
6707 int rc;
6708
6709 rc = snd_card_create(alsa_index, alsa_id, THIS_MODULE,
6710 sizeof(struct tpacpi_alsa_data), &card);
6711 if (rc < 0)
6712 return rc;
6713 if (!card)
6714 return -ENOMEM;
6715
6716 BUG_ON(!card->private_data);
6717 data = card->private_data;
6718 data->card = card;
6719
6720 strlcpy(card->driver, TPACPI_ALSA_DRVNAME,
6721 sizeof(card->driver));
6722 strlcpy(card->shortname, TPACPI_ALSA_SHRTNAME,
6723 sizeof(card->shortname));
6724 snprintf(card->mixername, sizeof(card->mixername), "ThinkPad EC %s",
6725 (thinkpad_id.ec_version_str) ?
6726 thinkpad_id.ec_version_str : "(unknown)");
6727 snprintf(card->longname, sizeof(card->longname),
6728 "%s at EC reg 0x%02x, fw %s", card->shortname, TP_EC_AUDIO,
6729 (thinkpad_id.ec_version_str) ?
6730 thinkpad_id.ec_version_str : "unknown");
6731
6732 if (volume_control_allowed) {
6733 volume_alsa_control_vol.put = volume_alsa_vol_put;
6734 volume_alsa_control_vol.access =
6735 SNDRV_CTL_ELEM_ACCESS_READWRITE;
6736
6737 volume_alsa_control_mute.put = volume_alsa_mute_put;
6738 volume_alsa_control_mute.access =
6739 SNDRV_CTL_ELEM_ACCESS_READWRITE;
6740 }
6741
6742 if (!tp_features.mixer_no_level_control) {
6743 ctl_vol = snd_ctl_new1(&volume_alsa_control_vol, NULL);
6744 rc = snd_ctl_add(card, ctl_vol);
6745 if (rc < 0) {
6746 printk(TPACPI_ERR
6747 "Failed to create ALSA volume control\n");
6748 goto err_out;
6749 }
6750 data->ctl_vol_id = &ctl_vol->id;
6751 }
6752
6753 ctl_mute = snd_ctl_new1(&volume_alsa_control_mute, NULL);
6754 rc = snd_ctl_add(card, ctl_mute);
6755 if (rc < 0) {
6756 printk(TPACPI_ERR "Failed to create ALSA mute control\n");
6757 goto err_out;
6758 }
6759 data->ctl_mute_id = &ctl_mute->id;
6760
6761 snd_card_set_dev(card, &tpacpi_pdev->dev);
6762 rc = snd_card_register(card);
6763
6764 err_out:
6765 if (rc < 0) {
6766 snd_card_free(card);
6767 card = NULL;
6768 }
6769
6770 alsa_card = card;
6771 return rc;
6772 }
6773
6774 #define TPACPI_VOL_Q_MUTEONLY 0x0001 /* Mute-only control available */
6775 #define TPACPI_VOL_Q_LEVEL 0x0002 /* Volume control available */
6776
6777 static const struct tpacpi_quirk volume_quirk_table[] __initconst = {
6778 /* Whitelist volume level on all IBM by default */
6779 { .vendor = PCI_VENDOR_ID_IBM,
6780 .bios = TPACPI_MATCH_ANY,
6781 .ec = TPACPI_MATCH_ANY,
6782 .quirks = TPACPI_VOL_Q_LEVEL },
6783
6784 /* Lenovo models with volume control (needs confirmation) */
6785 TPACPI_QEC_LNV('7', 'C', TPACPI_VOL_Q_LEVEL), /* R60/i */
6786 TPACPI_QEC_LNV('7', 'E', TPACPI_VOL_Q_LEVEL), /* R60e/i */
6787 TPACPI_QEC_LNV('7', '9', TPACPI_VOL_Q_LEVEL), /* T60/p */
6788 TPACPI_QEC_LNV('7', 'B', TPACPI_VOL_Q_LEVEL), /* X60/s */
6789 TPACPI_QEC_LNV('7', 'J', TPACPI_VOL_Q_LEVEL), /* X60t */
6790 TPACPI_QEC_LNV('7', '7', TPACPI_VOL_Q_LEVEL), /* Z60 */
6791 TPACPI_QEC_LNV('7', 'F', TPACPI_VOL_Q_LEVEL), /* Z61 */
6792
6793 /* Whitelist mute-only on all Lenovo by default */
6794 { .vendor = PCI_VENDOR_ID_LENOVO,
6795 .bios = TPACPI_MATCH_ANY,
6796 .ec = TPACPI_MATCH_ANY,
6797 .quirks = TPACPI_VOL_Q_MUTEONLY }
6798 };
6799
6800 static int __init volume_init(struct ibm_init_struct *iibm)
6801 {
6802 unsigned long quirks;
6803 int rc;
6804
6805 vdbg_printk(TPACPI_DBG_INIT, "initializing volume subdriver\n");
6806
6807 mutex_init(&volume_mutex);
6808
6809 /*
6810 * Check for module parameter bogosity, note that we
6811 * init volume_mode to TPACPI_VOL_MODE_MAX in order to be
6812 * able to detect "unspecified"
6813 */
6814 if (volume_mode > TPACPI_VOL_MODE_MAX)
6815 return -EINVAL;
6816
6817 if (volume_mode == TPACPI_VOL_MODE_UCMS_STEP) {
6818 printk(TPACPI_ERR
6819 "UCMS step volume mode not implemented, "
6820 "please contact %s\n", TPACPI_MAIL);
6821 return 1;
6822 }
6823
6824 if (volume_capabilities >= TPACPI_VOL_CAP_MAX)
6825 return -EINVAL;
6826
6827 /*
6828 * The ALSA mixer is our primary interface.
6829 * When disabled, don't install the subdriver at all
6830 */
6831 if (!alsa_enable) {
6832 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
6833 "ALSA mixer disabled by parameter, "
6834 "not loading volume subdriver...\n");
6835 return 1;
6836 }
6837
6838 quirks = tpacpi_check_quirks(volume_quirk_table,
6839 ARRAY_SIZE(volume_quirk_table));
6840
6841 switch (volume_capabilities) {
6842 case TPACPI_VOL_CAP_AUTO:
6843 if (quirks & TPACPI_VOL_Q_MUTEONLY)
6844 tp_features.mixer_no_level_control = 1;
6845 else if (quirks & TPACPI_VOL_Q_LEVEL)
6846 tp_features.mixer_no_level_control = 0;
6847 else
6848 return 1; /* no mixer */
6849 break;
6850 case TPACPI_VOL_CAP_VOLMUTE:
6851 tp_features.mixer_no_level_control = 0;
6852 break;
6853 case TPACPI_VOL_CAP_MUTEONLY:
6854 tp_features.mixer_no_level_control = 1;
6855 break;
6856 default:
6857 return 1;
6858 }
6859
6860 if (volume_capabilities != TPACPI_VOL_CAP_AUTO)
6861 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
6862 "using user-supplied volume_capabilities=%d\n",
6863 volume_capabilities);
6864
6865 if (volume_mode == TPACPI_VOL_MODE_AUTO ||
6866 volume_mode == TPACPI_VOL_MODE_MAX) {
6867 volume_mode = TPACPI_VOL_MODE_ECNVRAM;
6868
6869 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
6870 "driver auto-selected volume_mode=%d\n",
6871 volume_mode);
6872 } else {
6873 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
6874 "using user-supplied volume_mode=%d\n",
6875 volume_mode);
6876 }
6877
6878 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
6879 "mute is supported, volume control is %s\n",
6880 str_supported(!tp_features.mixer_no_level_control));
6881
6882 rc = volume_create_alsa_mixer();
6883 if (rc) {
6884 printk(TPACPI_ERR
6885 "Could not create the ALSA mixer interface\n");
6886 return rc;
6887 }
6888
6889 printk(TPACPI_INFO
6890 "Console audio control enabled, mode: %s\n",
6891 (volume_control_allowed) ?
6892 "override (read/write)" :
6893 "monitor (read only)");
6894
6895 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
6896 "registering volume hotkeys as change notification\n");
6897 tpacpi_hotkey_driver_mask_set(hotkey_driver_mask
6898 | TP_ACPI_HKEY_VOLUP_MASK
6899 | TP_ACPI_HKEY_VOLDWN_MASK
6900 | TP_ACPI_HKEY_MUTE_MASK);
6901
6902 return 0;
6903 }
6904
6905 static int volume_read(struct seq_file *m)
6906 {
6907 u8 status;
6908
6909 if (volume_get_status(&status) < 0) {
6910 seq_printf(m, "level:\t\tunreadable\n");
6911 } else {
6912 if (tp_features.mixer_no_level_control)
6913 seq_printf(m, "level:\t\tunsupported\n");
6914 else
6915 seq_printf(m, "level:\t\t%d\n",
6916 status & TP_EC_AUDIO_LVL_MSK);
6917
6918 seq_printf(m, "mute:\t\t%s\n",
6919 onoff(status, TP_EC_AUDIO_MUTESW));
6920
6921 if (volume_control_allowed) {
6922 seq_printf(m, "commands:\tunmute, mute\n");
6923 if (!tp_features.mixer_no_level_control) {
6924 seq_printf(m,
6925 "commands:\tup, down\n");
6926 seq_printf(m,
6927 "commands:\tlevel <level>"
6928 " (<level> is 0-%d)\n",
6929 TP_EC_VOLUME_MAX);
6930 }
6931 }
6932 }
6933
6934 return 0;
6935 }
6936
6937 static int volume_write(char *buf)
6938 {
6939 u8 s;
6940 u8 new_level, new_mute;
6941 int l;
6942 char *cmd;
6943 int rc;
6944
6945 /*
6946 * We do allow volume control at driver startup, so that the
6947 * user can set initial state through the volume=... parameter hack.
6948 */
6949 if (!volume_control_allowed && tpacpi_lifecycle != TPACPI_LIFE_INIT) {
6950 if (unlikely(!tp_warned.volume_ctrl_forbidden)) {
6951 tp_warned.volume_ctrl_forbidden = 1;
6952 printk(TPACPI_NOTICE
6953 "Console audio control in monitor mode, "
6954 "changes are not allowed.\n");
6955 printk(TPACPI_NOTICE
6956 "Use the volume_control=1 module parameter "
6957 "to enable volume control\n");
6958 }
6959 return -EPERM;
6960 }
6961
6962 rc = volume_get_status(&s);
6963 if (rc < 0)
6964 return rc;
6965
6966 new_level = s & TP_EC_AUDIO_LVL_MSK;
6967 new_mute = s & TP_EC_AUDIO_MUTESW_MSK;
6968
6969 while ((cmd = next_cmd(&buf))) {
6970 if (!tp_features.mixer_no_level_control) {
6971 if (strlencmp(cmd, "up") == 0) {
6972 if (new_mute)
6973 new_mute = 0;
6974 else if (new_level < TP_EC_VOLUME_MAX)
6975 new_level++;
6976 continue;
6977 } else if (strlencmp(cmd, "down") == 0) {
6978 if (new_mute)
6979 new_mute = 0;
6980 else if (new_level > 0)
6981 new_level--;
6982 continue;
6983 } else if (sscanf(cmd, "level %u", &l) == 1 &&
6984 l >= 0 && l <= TP_EC_VOLUME_MAX) {
6985 new_level = l;
6986 continue;
6987 }
6988 }
6989 if (strlencmp(cmd, "mute") == 0)
6990 new_mute = TP_EC_AUDIO_MUTESW_MSK;
6991 else if (strlencmp(cmd, "unmute") == 0)
6992 new_mute = 0;
6993 else
6994 return -EINVAL;
6995 }
6996
6997 if (tp_features.mixer_no_level_control) {
6998 tpacpi_disclose_usertask("procfs volume", "%smute\n",
6999 new_mute ? "" : "un");
7000 rc = volume_set_mute(!!new_mute);
7001 } else {
7002 tpacpi_disclose_usertask("procfs volume",
7003 "%smute and set level to %d\n",
7004 new_mute ? "" : "un", new_level);
7005 rc = volume_set_status(new_mute | new_level);
7006 }
7007 volume_alsa_notify_change();
7008
7009 return (rc == -EINTR) ? -ERESTARTSYS : rc;
7010 }
7011
7012 static struct ibm_struct volume_driver_data = {
7013 .name = "volume",
7014 .read = volume_read,
7015 .write = volume_write,
7016 .exit = volume_exit,
7017 .suspend = volume_suspend,
7018 .resume = volume_resume,
7019 .shutdown = volume_shutdown,
7020 };
7021
7022 /*************************************************************************
7023 * Fan subdriver
7024 */
7025
7026 /*
7027 * FAN ACCESS MODES
7028 *
7029 * TPACPI_FAN_RD_ACPI_GFAN:
7030 * ACPI GFAN method: returns fan level
7031 *
7032 * see TPACPI_FAN_WR_ACPI_SFAN
7033 * EC 0x2f (HFSP) not available if GFAN exists
7034 *
7035 * TPACPI_FAN_WR_ACPI_SFAN:
7036 * ACPI SFAN method: sets fan level, 0 (stop) to 7 (max)
7037 *
7038 * EC 0x2f (HFSP) might be available *for reading*, but do not use
7039 * it for writing.
7040 *
7041 * TPACPI_FAN_WR_TPEC:
7042 * ThinkPad EC register 0x2f (HFSP): fan control loop mode
7043 * Supported on almost all ThinkPads
7044 *
7045 * Fan speed changes of any sort (including those caused by the
7046 * disengaged mode) are usually done slowly by the firmware as the
7047 * maximum ammount of fan duty cycle change per second seems to be
7048 * limited.
7049 *
7050 * Reading is not available if GFAN exists.
7051 * Writing is not available if SFAN exists.
7052 *
7053 * Bits
7054 * 7 automatic mode engaged;
7055 * (default operation mode of the ThinkPad)
7056 * fan level is ignored in this mode.
7057 * 6 full speed mode (takes precedence over bit 7);
7058 * not available on all thinkpads. May disable
7059 * the tachometer while the fan controller ramps up
7060 * the speed (which can take up to a few *minutes*).
7061 * Speeds up fan to 100% duty-cycle, which is far above
7062 * the standard RPM levels. It is not impossible that
7063 * it could cause hardware damage.
7064 * 5-3 unused in some models. Extra bits for fan level
7065 * in others, but still useless as all values above
7066 * 7 map to the same speed as level 7 in these models.
7067 * 2-0 fan level (0..7 usually)
7068 * 0x00 = stop
7069 * 0x07 = max (set when temperatures critical)
7070 * Some ThinkPads may have other levels, see
7071 * TPACPI_FAN_WR_ACPI_FANS (X31/X40/X41)
7072 *
7073 * FIRMWARE BUG: on some models, EC 0x2f might not be initialized at
7074 * boot. Apparently the EC does not intialize it, so unless ACPI DSDT
7075 * does so, its initial value is meaningless (0x07).
7076 *
7077 * For firmware bugs, refer to:
7078 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
7079 *
7080 * ----
7081 *
7082 * ThinkPad EC register 0x84 (LSB), 0x85 (MSB):
7083 * Main fan tachometer reading (in RPM)
7084 *
7085 * This register is present on all ThinkPads with a new-style EC, and
7086 * it is known not to be present on the A21m/e, and T22, as there is
7087 * something else in offset 0x84 according to the ACPI DSDT. Other
7088 * ThinkPads from this same time period (and earlier) probably lack the
7089 * tachometer as well.
7090 *
7091 * Unfortunately a lot of ThinkPads with new-style ECs but whose firmware
7092 * was never fixed by IBM to report the EC firmware version string
7093 * probably support the tachometer (like the early X models), so
7094 * detecting it is quite hard. We need more data to know for sure.
7095 *
7096 * FIRMWARE BUG: always read 0x84 first, otherwise incorrect readings
7097 * might result.
7098 *
7099 * FIRMWARE BUG: may go stale while the EC is switching to full speed
7100 * mode.
7101 *
7102 * For firmware bugs, refer to:
7103 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
7104 *
7105 * ----
7106 *
7107 * ThinkPad EC register 0x31 bit 0 (only on select models)
7108 *
7109 * When bit 0 of EC register 0x31 is zero, the tachometer registers
7110 * show the speed of the main fan. When bit 0 of EC register 0x31
7111 * is one, the tachometer registers show the speed of the auxiliary
7112 * fan.
7113 *
7114 * Fan control seems to affect both fans, regardless of the state
7115 * of this bit.
7116 *
7117 * So far, only the firmware for the X60/X61 non-tablet versions
7118 * seem to support this (firmware TP-7M).
7119 *
7120 * TPACPI_FAN_WR_ACPI_FANS:
7121 * ThinkPad X31, X40, X41. Not available in the X60.
7122 *
7123 * FANS ACPI handle: takes three arguments: low speed, medium speed,
7124 * high speed. ACPI DSDT seems to map these three speeds to levels
7125 * as follows: STOP LOW LOW MED MED HIGH HIGH HIGH HIGH
7126 * (this map is stored on FAN0..FAN8 as "0,1,1,2,2,3,3,3,3")
7127 *
7128 * The speeds are stored on handles
7129 * (FANA:FAN9), (FANC:FANB), (FANE:FAND).
7130 *
7131 * There are three default speed sets, acessible as handles:
7132 * FS1L,FS1M,FS1H; FS2L,FS2M,FS2H; FS3L,FS3M,FS3H
7133 *
7134 * ACPI DSDT switches which set is in use depending on various
7135 * factors.
7136 *
7137 * TPACPI_FAN_WR_TPEC is also available and should be used to
7138 * command the fan. The X31/X40/X41 seems to have 8 fan levels,
7139 * but the ACPI tables just mention level 7.
7140 */
7141
7142 enum { /* Fan control constants */
7143 fan_status_offset = 0x2f, /* EC register 0x2f */
7144 fan_rpm_offset = 0x84, /* EC register 0x84: LSB, 0x85 MSB (RPM)
7145 * 0x84 must be read before 0x85 */
7146 fan_select_offset = 0x31, /* EC register 0x31 (Firmware 7M)
7147 bit 0 selects which fan is active */
7148
7149 TP_EC_FAN_FULLSPEED = 0x40, /* EC fan mode: full speed */
7150 TP_EC_FAN_AUTO = 0x80, /* EC fan mode: auto fan control */
7151
7152 TPACPI_FAN_LAST_LEVEL = 0x100, /* Use cached last-seen fan level */
7153 };
7154
7155 enum fan_status_access_mode {
7156 TPACPI_FAN_NONE = 0, /* No fan status or control */
7157 TPACPI_FAN_RD_ACPI_GFAN, /* Use ACPI GFAN */
7158 TPACPI_FAN_RD_TPEC, /* Use ACPI EC regs 0x2f, 0x84-0x85 */
7159 };
7160
7161 enum fan_control_access_mode {
7162 TPACPI_FAN_WR_NONE = 0, /* No fan control */
7163 TPACPI_FAN_WR_ACPI_SFAN, /* Use ACPI SFAN */
7164 TPACPI_FAN_WR_TPEC, /* Use ACPI EC reg 0x2f */
7165 TPACPI_FAN_WR_ACPI_FANS, /* Use ACPI FANS and EC reg 0x2f */
7166 };
7167
7168 enum fan_control_commands {
7169 TPACPI_FAN_CMD_SPEED = 0x0001, /* speed command */
7170 TPACPI_FAN_CMD_LEVEL = 0x0002, /* level command */
7171 TPACPI_FAN_CMD_ENABLE = 0x0004, /* enable/disable cmd,
7172 * and also watchdog cmd */
7173 };
7174
7175 static int fan_control_allowed;
7176
7177 static enum fan_status_access_mode fan_status_access_mode;
7178 static enum fan_control_access_mode fan_control_access_mode;
7179 static enum fan_control_commands fan_control_commands;
7180
7181 static u8 fan_control_initial_status;
7182 static u8 fan_control_desired_level;
7183 static u8 fan_control_resume_level;
7184 static int fan_watchdog_maxinterval;
7185
7186 static struct mutex fan_mutex;
7187
7188 static void fan_watchdog_fire(struct work_struct *ignored);
7189 static DECLARE_DELAYED_WORK(fan_watchdog_task, fan_watchdog_fire);
7190
7191 TPACPI_HANDLE(fans, ec, "FANS"); /* X31, X40, X41 */
7192 TPACPI_HANDLE(gfan, ec, "GFAN", /* 570 */
7193 "\\FSPD", /* 600e/x, 770e, 770x */
7194 ); /* all others */
7195 TPACPI_HANDLE(sfan, ec, "SFAN", /* 570 */
7196 "JFNS", /* 770x-JL */
7197 ); /* all others */
7198
7199 /*
7200 * Unitialized HFSP quirk: ACPI DSDT and EC fail to initialize the
7201 * HFSP register at boot, so it contains 0x07 but the Thinkpad could
7202 * be in auto mode (0x80).
7203 *
7204 * This is corrected by any write to HFSP either by the driver, or
7205 * by the firmware.
7206 *
7207 * We assume 0x07 really means auto mode while this quirk is active,
7208 * as this is far more likely than the ThinkPad being in level 7,
7209 * which is only used by the firmware during thermal emergencies.
7210 *
7211 * Enable for TP-1Y (T43), TP-78 (R51e), TP-76 (R52),
7212 * TP-70 (T43, R52), which are known to be buggy.
7213 */
7214
7215 static void fan_quirk1_setup(void)
7216 {
7217 if (fan_control_initial_status == 0x07) {
7218 printk(TPACPI_NOTICE
7219 "fan_init: initial fan status is unknown, "
7220 "assuming it is in auto mode\n");
7221 tp_features.fan_ctrl_status_undef = 1;
7222 }
7223 }
7224
7225 static void fan_quirk1_handle(u8 *fan_status)
7226 {
7227 if (unlikely(tp_features.fan_ctrl_status_undef)) {
7228 if (*fan_status != fan_control_initial_status) {
7229 /* something changed the HFSP regisnter since
7230 * driver init time, so it is not undefined
7231 * anymore */
7232 tp_features.fan_ctrl_status_undef = 0;
7233 } else {
7234 /* Return most likely status. In fact, it
7235 * might be the only possible status */
7236 *fan_status = TP_EC_FAN_AUTO;
7237 }
7238 }
7239 }
7240
7241 /* Select main fan on X60/X61, NOOP on others */
7242 static bool fan_select_fan1(void)
7243 {
7244 if (tp_features.second_fan) {
7245 u8 val;
7246
7247 if (ec_read(fan_select_offset, &val) < 0)
7248 return false;
7249 val &= 0xFEU;
7250 if (ec_write(fan_select_offset, val) < 0)
7251 return false;
7252 }
7253 return true;
7254 }
7255
7256 /* Select secondary fan on X60/X61 */
7257 static bool fan_select_fan2(void)
7258 {
7259 u8 val;
7260
7261 if (!tp_features.second_fan)
7262 return false;
7263
7264 if (ec_read(fan_select_offset, &val) < 0)
7265 return false;
7266 val |= 0x01U;
7267 if (ec_write(fan_select_offset, val) < 0)
7268 return false;
7269
7270 return true;
7271 }
7272
7273 /*
7274 * Call with fan_mutex held
7275 */
7276 static void fan_update_desired_level(u8 status)
7277 {
7278 if ((status &
7279 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
7280 if (status > 7)
7281 fan_control_desired_level = 7;
7282 else
7283 fan_control_desired_level = status;
7284 }
7285 }
7286
7287 static int fan_get_status(u8 *status)
7288 {
7289 u8 s;
7290
7291 /* TODO:
7292 * Add TPACPI_FAN_RD_ACPI_FANS ? */
7293
7294 switch (fan_status_access_mode) {
7295 case TPACPI_FAN_RD_ACPI_GFAN:
7296 /* 570, 600e/x, 770e, 770x */
7297
7298 if (unlikely(!acpi_evalf(gfan_handle, &s, NULL, "d")))
7299 return -EIO;
7300
7301 if (likely(status))
7302 *status = s & 0x07;
7303
7304 break;
7305
7306 case TPACPI_FAN_RD_TPEC:
7307 /* all except 570, 600e/x, 770e, 770x */
7308 if (unlikely(!acpi_ec_read(fan_status_offset, &s)))
7309 return -EIO;
7310
7311 if (likely(status)) {
7312 *status = s;
7313 fan_quirk1_handle(status);
7314 }
7315
7316 break;
7317
7318 default:
7319 return -ENXIO;
7320 }
7321
7322 return 0;
7323 }
7324
7325 static int fan_get_status_safe(u8 *status)
7326 {
7327 int rc;
7328 u8 s;
7329
7330 if (mutex_lock_killable(&fan_mutex))
7331 return -ERESTARTSYS;
7332 rc = fan_get_status(&s);
7333 if (!rc)
7334 fan_update_desired_level(s);
7335 mutex_unlock(&fan_mutex);
7336
7337 if (status)
7338 *status = s;
7339
7340 return rc;
7341 }
7342
7343 static int fan_get_speed(unsigned int *speed)
7344 {
7345 u8 hi, lo;
7346
7347 switch (fan_status_access_mode) {
7348 case TPACPI_FAN_RD_TPEC:
7349 /* all except 570, 600e/x, 770e, 770x */
7350 if (unlikely(!fan_select_fan1()))
7351 return -EIO;
7352 if (unlikely(!acpi_ec_read(fan_rpm_offset, &lo) ||
7353 !acpi_ec_read(fan_rpm_offset + 1, &hi)))
7354 return -EIO;
7355
7356 if (likely(speed))
7357 *speed = (hi << 8) | lo;
7358
7359 break;
7360
7361 default:
7362 return -ENXIO;
7363 }
7364
7365 return 0;
7366 }
7367
7368 static int fan2_get_speed(unsigned int *speed)
7369 {
7370 u8 hi, lo;
7371 bool rc;
7372
7373 switch (fan_status_access_mode) {
7374 case TPACPI_FAN_RD_TPEC:
7375 /* all except 570, 600e/x, 770e, 770x */
7376 if (unlikely(!fan_select_fan2()))
7377 return -EIO;
7378 rc = !acpi_ec_read(fan_rpm_offset, &lo) ||
7379 !acpi_ec_read(fan_rpm_offset + 1, &hi);
7380 fan_select_fan1(); /* play it safe */
7381 if (rc)
7382 return -EIO;
7383
7384 if (likely(speed))
7385 *speed = (hi << 8) | lo;
7386
7387 break;
7388
7389 default:
7390 return -ENXIO;
7391 }
7392
7393 return 0;
7394 }
7395
7396 static int fan_set_level(int level)
7397 {
7398 if (!fan_control_allowed)
7399 return -EPERM;
7400
7401 switch (fan_control_access_mode) {
7402 case TPACPI_FAN_WR_ACPI_SFAN:
7403 if (level >= 0 && level <= 7) {
7404 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", level))
7405 return -EIO;
7406 } else
7407 return -EINVAL;
7408 break;
7409
7410 case TPACPI_FAN_WR_ACPI_FANS:
7411 case TPACPI_FAN_WR_TPEC:
7412 if (!(level & TP_EC_FAN_AUTO) &&
7413 !(level & TP_EC_FAN_FULLSPEED) &&
7414 ((level < 0) || (level > 7)))
7415 return -EINVAL;
7416
7417 /* safety net should the EC not support AUTO
7418 * or FULLSPEED mode bits and just ignore them */
7419 if (level & TP_EC_FAN_FULLSPEED)
7420 level |= 7; /* safety min speed 7 */
7421 else if (level & TP_EC_FAN_AUTO)
7422 level |= 4; /* safety min speed 4 */
7423
7424 if (!acpi_ec_write(fan_status_offset, level))
7425 return -EIO;
7426 else
7427 tp_features.fan_ctrl_status_undef = 0;
7428 break;
7429
7430 default:
7431 return -ENXIO;
7432 }
7433
7434 vdbg_printk(TPACPI_DBG_FAN,
7435 "fan control: set fan control register to 0x%02x\n", level);
7436 return 0;
7437 }
7438
7439 static int fan_set_level_safe(int level)
7440 {
7441 int rc;
7442
7443 if (!fan_control_allowed)
7444 return -EPERM;
7445
7446 if (mutex_lock_killable(&fan_mutex))
7447 return -ERESTARTSYS;
7448
7449 if (level == TPACPI_FAN_LAST_LEVEL)
7450 level = fan_control_desired_level;
7451
7452 rc = fan_set_level(level);
7453 if (!rc)
7454 fan_update_desired_level(level);
7455
7456 mutex_unlock(&fan_mutex);
7457 return rc;
7458 }
7459
7460 static int fan_set_enable(void)
7461 {
7462 u8 s;
7463 int rc;
7464
7465 if (!fan_control_allowed)
7466 return -EPERM;
7467
7468 if (mutex_lock_killable(&fan_mutex))
7469 return -ERESTARTSYS;
7470
7471 switch (fan_control_access_mode) {
7472 case TPACPI_FAN_WR_ACPI_FANS:
7473 case TPACPI_FAN_WR_TPEC:
7474 rc = fan_get_status(&s);
7475 if (rc < 0)
7476 break;
7477
7478 /* Don't go out of emergency fan mode */
7479 if (s != 7) {
7480 s &= 0x07;
7481 s |= TP_EC_FAN_AUTO | 4; /* min fan speed 4 */
7482 }
7483
7484 if (!acpi_ec_write(fan_status_offset, s))
7485 rc = -EIO;
7486 else {
7487 tp_features.fan_ctrl_status_undef = 0;
7488 rc = 0;
7489 }
7490 break;
7491
7492 case TPACPI_FAN_WR_ACPI_SFAN:
7493 rc = fan_get_status(&s);
7494 if (rc < 0)
7495 break;
7496
7497 s &= 0x07;
7498
7499 /* Set fan to at least level 4 */
7500 s |= 4;
7501
7502 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", s))
7503 rc = -EIO;
7504 else
7505 rc = 0;
7506 break;
7507
7508 default:
7509 rc = -ENXIO;
7510 }
7511
7512 mutex_unlock(&fan_mutex);
7513
7514 if (!rc)
7515 vdbg_printk(TPACPI_DBG_FAN,
7516 "fan control: set fan control register to 0x%02x\n",
7517 s);
7518 return rc;
7519 }
7520
7521 static int fan_set_disable(void)
7522 {
7523 int rc;
7524
7525 if (!fan_control_allowed)
7526 return -EPERM;
7527
7528 if (mutex_lock_killable(&fan_mutex))
7529 return -ERESTARTSYS;
7530
7531 rc = 0;
7532 switch (fan_control_access_mode) {
7533 case TPACPI_FAN_WR_ACPI_FANS:
7534 case TPACPI_FAN_WR_TPEC:
7535 if (!acpi_ec_write(fan_status_offset, 0x00))
7536 rc = -EIO;
7537 else {
7538 fan_control_desired_level = 0;
7539 tp_features.fan_ctrl_status_undef = 0;
7540 }
7541 break;
7542
7543 case TPACPI_FAN_WR_ACPI_SFAN:
7544 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", 0x00))
7545 rc = -EIO;
7546 else
7547 fan_control_desired_level = 0;
7548 break;
7549
7550 default:
7551 rc = -ENXIO;
7552 }
7553
7554 if (!rc)
7555 vdbg_printk(TPACPI_DBG_FAN,
7556 "fan control: set fan control register to 0\n");
7557
7558 mutex_unlock(&fan_mutex);
7559 return rc;
7560 }
7561
7562 static int fan_set_speed(int speed)
7563 {
7564 int rc;
7565
7566 if (!fan_control_allowed)
7567 return -EPERM;
7568
7569 if (mutex_lock_killable(&fan_mutex))
7570 return -ERESTARTSYS;
7571
7572 rc = 0;
7573 switch (fan_control_access_mode) {
7574 case TPACPI_FAN_WR_ACPI_FANS:
7575 if (speed >= 0 && speed <= 65535) {
7576 if (!acpi_evalf(fans_handle, NULL, NULL, "vddd",
7577 speed, speed, speed))
7578 rc = -EIO;
7579 } else
7580 rc = -EINVAL;
7581 break;
7582
7583 default:
7584 rc = -ENXIO;
7585 }
7586
7587 mutex_unlock(&fan_mutex);
7588 return rc;
7589 }
7590
7591 static void fan_watchdog_reset(void)
7592 {
7593 static int fan_watchdog_active;
7594
7595 if (fan_control_access_mode == TPACPI_FAN_WR_NONE)
7596 return;
7597
7598 if (fan_watchdog_active)
7599 cancel_delayed_work(&fan_watchdog_task);
7600
7601 if (fan_watchdog_maxinterval > 0 &&
7602 tpacpi_lifecycle != TPACPI_LIFE_EXITING) {
7603 fan_watchdog_active = 1;
7604 if (!queue_delayed_work(tpacpi_wq, &fan_watchdog_task,
7605 msecs_to_jiffies(fan_watchdog_maxinterval
7606 * 1000))) {
7607 printk(TPACPI_ERR
7608 "failed to queue the fan watchdog, "
7609 "watchdog will not trigger\n");
7610 }
7611 } else
7612 fan_watchdog_active = 0;
7613 }
7614
7615 static void fan_watchdog_fire(struct work_struct *ignored)
7616 {
7617 int rc;
7618
7619 if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
7620 return;
7621
7622 printk(TPACPI_NOTICE "fan watchdog: enabling fan\n");
7623 rc = fan_set_enable();
7624 if (rc < 0) {
7625 printk(TPACPI_ERR "fan watchdog: error %d while enabling fan, "
7626 "will try again later...\n", -rc);
7627 /* reschedule for later */
7628 fan_watchdog_reset();
7629 }
7630 }
7631
7632 /*
7633 * SYSFS fan layout: hwmon compatible (device)
7634 *
7635 * pwm*_enable:
7636 * 0: "disengaged" mode
7637 * 1: manual mode
7638 * 2: native EC "auto" mode (recommended, hardware default)
7639 *
7640 * pwm*: set speed in manual mode, ignored otherwise.
7641 * 0 is level 0; 255 is level 7. Intermediate points done with linear
7642 * interpolation.
7643 *
7644 * fan*_input: tachometer reading, RPM
7645 *
7646 *
7647 * SYSFS fan layout: extensions
7648 *
7649 * fan_watchdog (driver):
7650 * fan watchdog interval in seconds, 0 disables (default), max 120
7651 */
7652
7653 /* sysfs fan pwm1_enable ----------------------------------------------- */
7654 static ssize_t fan_pwm1_enable_show(struct device *dev,
7655 struct device_attribute *attr,
7656 char *buf)
7657 {
7658 int res, mode;
7659 u8 status;
7660
7661 res = fan_get_status_safe(&status);
7662 if (res)
7663 return res;
7664
7665 if (status & TP_EC_FAN_FULLSPEED) {
7666 mode = 0;
7667 } else if (status & TP_EC_FAN_AUTO) {
7668 mode = 2;
7669 } else
7670 mode = 1;
7671
7672 return snprintf(buf, PAGE_SIZE, "%d\n", mode);
7673 }
7674
7675 static ssize_t fan_pwm1_enable_store(struct device *dev,
7676 struct device_attribute *attr,
7677 const char *buf, size_t count)
7678 {
7679 unsigned long t;
7680 int res, level;
7681
7682 if (parse_strtoul(buf, 2, &t))
7683 return -EINVAL;
7684
7685 tpacpi_disclose_usertask("hwmon pwm1_enable",
7686 "set fan mode to %lu\n", t);
7687
7688 switch (t) {
7689 case 0:
7690 level = TP_EC_FAN_FULLSPEED;
7691 break;
7692 case 1:
7693 level = TPACPI_FAN_LAST_LEVEL;
7694 break;
7695 case 2:
7696 level = TP_EC_FAN_AUTO;
7697 break;
7698 case 3:
7699 /* reserved for software-controlled auto mode */
7700 return -ENOSYS;
7701 default:
7702 return -EINVAL;
7703 }
7704
7705 res = fan_set_level_safe(level);
7706 if (res == -ENXIO)
7707 return -EINVAL;
7708 else if (res < 0)
7709 return res;
7710
7711 fan_watchdog_reset();
7712
7713 return count;
7714 }
7715
7716 static struct device_attribute dev_attr_fan_pwm1_enable =
7717 __ATTR(pwm1_enable, S_IWUSR | S_IRUGO,
7718 fan_pwm1_enable_show, fan_pwm1_enable_store);
7719
7720 /* sysfs fan pwm1 ------------------------------------------------------ */
7721 static ssize_t fan_pwm1_show(struct device *dev,
7722 struct device_attribute *attr,
7723 char *buf)
7724 {
7725 int res;
7726 u8 status;
7727
7728 res = fan_get_status_safe(&status);
7729 if (res)
7730 return res;
7731
7732 if ((status &
7733 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) != 0)
7734 status = fan_control_desired_level;
7735
7736 if (status > 7)
7737 status = 7;
7738
7739 return snprintf(buf, PAGE_SIZE, "%u\n", (status * 255) / 7);
7740 }
7741
7742 static ssize_t fan_pwm1_store(struct device *dev,
7743 struct device_attribute *attr,
7744 const char *buf, size_t count)
7745 {
7746 unsigned long s;
7747 int rc;
7748 u8 status, newlevel;
7749
7750 if (parse_strtoul(buf, 255, &s))
7751 return -EINVAL;
7752
7753 tpacpi_disclose_usertask("hwmon pwm1",
7754 "set fan speed to %lu\n", s);
7755
7756 /* scale down from 0-255 to 0-7 */
7757 newlevel = (s >> 5) & 0x07;
7758
7759 if (mutex_lock_killable(&fan_mutex))
7760 return -ERESTARTSYS;
7761
7762 rc = fan_get_status(&status);
7763 if (!rc && (status &
7764 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
7765 rc = fan_set_level(newlevel);
7766 if (rc == -ENXIO)
7767 rc = -EINVAL;
7768 else if (!rc) {
7769 fan_update_desired_level(newlevel);
7770 fan_watchdog_reset();
7771 }
7772 }
7773
7774 mutex_unlock(&fan_mutex);
7775 return (rc)? rc : count;
7776 }
7777
7778 static struct device_attribute dev_attr_fan_pwm1 =
7779 __ATTR(pwm1, S_IWUSR | S_IRUGO,
7780 fan_pwm1_show, fan_pwm1_store);
7781
7782 /* sysfs fan fan1_input ------------------------------------------------ */
7783 static ssize_t fan_fan1_input_show(struct device *dev,
7784 struct device_attribute *attr,
7785 char *buf)
7786 {
7787 int res;
7788 unsigned int speed;
7789
7790 res = fan_get_speed(&speed);
7791 if (res < 0)
7792 return res;
7793
7794 return snprintf(buf, PAGE_SIZE, "%u\n", speed);
7795 }
7796
7797 static struct device_attribute dev_attr_fan_fan1_input =
7798 __ATTR(fan1_input, S_IRUGO,
7799 fan_fan1_input_show, NULL);
7800
7801 /* sysfs fan fan2_input ------------------------------------------------ */
7802 static ssize_t fan_fan2_input_show(struct device *dev,
7803 struct device_attribute *attr,
7804 char *buf)
7805 {
7806 int res;
7807 unsigned int speed;
7808
7809 res = fan2_get_speed(&speed);
7810 if (res < 0)
7811 return res;
7812
7813 return snprintf(buf, PAGE_SIZE, "%u\n", speed);
7814 }
7815
7816 static struct device_attribute dev_attr_fan_fan2_input =
7817 __ATTR(fan2_input, S_IRUGO,
7818 fan_fan2_input_show, NULL);
7819
7820 /* sysfs fan fan_watchdog (hwmon driver) ------------------------------- */
7821 static ssize_t fan_fan_watchdog_show(struct device_driver *drv,
7822 char *buf)
7823 {
7824 return snprintf(buf, PAGE_SIZE, "%u\n", fan_watchdog_maxinterval);
7825 }
7826
7827 static ssize_t fan_fan_watchdog_store(struct device_driver *drv,
7828 const char *buf, size_t count)
7829 {
7830 unsigned long t;
7831
7832 if (parse_strtoul(buf, 120, &t))
7833 return -EINVAL;
7834
7835 if (!fan_control_allowed)
7836 return -EPERM;
7837
7838 fan_watchdog_maxinterval = t;
7839 fan_watchdog_reset();
7840
7841 tpacpi_disclose_usertask("fan_watchdog", "set to %lu\n", t);
7842
7843 return count;
7844 }
7845
7846 static DRIVER_ATTR(fan_watchdog, S_IWUSR | S_IRUGO,
7847 fan_fan_watchdog_show, fan_fan_watchdog_store);
7848
7849 /* --------------------------------------------------------------------- */
7850 static struct attribute *fan_attributes[] = {
7851 &dev_attr_fan_pwm1_enable.attr, &dev_attr_fan_pwm1.attr,
7852 &dev_attr_fan_fan1_input.attr,
7853 NULL, /* for fan2_input */
7854 NULL
7855 };
7856
7857 static const struct attribute_group fan_attr_group = {
7858 .attrs = fan_attributes,
7859 };
7860
7861 #define TPACPI_FAN_Q1 0x0001 /* Unitialized HFSP */
7862 #define TPACPI_FAN_2FAN 0x0002 /* EC 0x31 bit 0 selects fan2 */
7863
7864 #define TPACPI_FAN_QI(__id1, __id2, __quirks) \
7865 { .vendor = PCI_VENDOR_ID_IBM, \
7866 .bios = TPACPI_MATCH_ANY, \
7867 .ec = TPID(__id1, __id2), \
7868 .quirks = __quirks }
7869
7870 #define TPACPI_FAN_QL(__id1, __id2, __quirks) \
7871 { .vendor = PCI_VENDOR_ID_LENOVO, \
7872 .bios = TPACPI_MATCH_ANY, \
7873 .ec = TPID(__id1, __id2), \
7874 .quirks = __quirks }
7875
7876 static const struct tpacpi_quirk fan_quirk_table[] __initconst = {
7877 TPACPI_FAN_QI('1', 'Y', TPACPI_FAN_Q1),
7878 TPACPI_FAN_QI('7', '8', TPACPI_FAN_Q1),
7879 TPACPI_FAN_QI('7', '6', TPACPI_FAN_Q1),
7880 TPACPI_FAN_QI('7', '0', TPACPI_FAN_Q1),
7881 TPACPI_FAN_QL('7', 'M', TPACPI_FAN_2FAN),
7882 };
7883
7884 #undef TPACPI_FAN_QL
7885 #undef TPACPI_FAN_QI
7886
7887 static int __init fan_init(struct ibm_init_struct *iibm)
7888 {
7889 int rc;
7890 unsigned long quirks;
7891
7892 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
7893 "initializing fan subdriver\n");
7894
7895 mutex_init(&fan_mutex);
7896 fan_status_access_mode = TPACPI_FAN_NONE;
7897 fan_control_access_mode = TPACPI_FAN_WR_NONE;
7898 fan_control_commands = 0;
7899 fan_watchdog_maxinterval = 0;
7900 tp_features.fan_ctrl_status_undef = 0;
7901 tp_features.second_fan = 0;
7902 fan_control_desired_level = 7;
7903
7904 TPACPI_ACPIHANDLE_INIT(fans);
7905 TPACPI_ACPIHANDLE_INIT(gfan);
7906 TPACPI_ACPIHANDLE_INIT(sfan);
7907
7908 quirks = tpacpi_check_quirks(fan_quirk_table,
7909 ARRAY_SIZE(fan_quirk_table));
7910
7911 if (gfan_handle) {
7912 /* 570, 600e/x, 770e, 770x */
7913 fan_status_access_mode = TPACPI_FAN_RD_ACPI_GFAN;
7914 } else {
7915 /* all other ThinkPads: note that even old-style
7916 * ThinkPad ECs supports the fan control register */
7917 if (likely(acpi_ec_read(fan_status_offset,
7918 &fan_control_initial_status))) {
7919 fan_status_access_mode = TPACPI_FAN_RD_TPEC;
7920 if (quirks & TPACPI_FAN_Q1)
7921 fan_quirk1_setup();
7922 if (quirks & TPACPI_FAN_2FAN) {
7923 tp_features.second_fan = 1;
7924 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
7925 "secondary fan support enabled\n");
7926 }
7927 } else {
7928 printk(TPACPI_ERR
7929 "ThinkPad ACPI EC access misbehaving, "
7930 "fan status and control unavailable\n");
7931 return 1;
7932 }
7933 }
7934
7935 if (sfan_handle) {
7936 /* 570, 770x-JL */
7937 fan_control_access_mode = TPACPI_FAN_WR_ACPI_SFAN;
7938 fan_control_commands |=
7939 TPACPI_FAN_CMD_LEVEL | TPACPI_FAN_CMD_ENABLE;
7940 } else {
7941 if (!gfan_handle) {
7942 /* gfan without sfan means no fan control */
7943 /* all other models implement TP EC 0x2f control */
7944
7945 if (fans_handle) {
7946 /* X31, X40, X41 */
7947 fan_control_access_mode =
7948 TPACPI_FAN_WR_ACPI_FANS;
7949 fan_control_commands |=
7950 TPACPI_FAN_CMD_SPEED |
7951 TPACPI_FAN_CMD_LEVEL |
7952 TPACPI_FAN_CMD_ENABLE;
7953 } else {
7954 fan_control_access_mode = TPACPI_FAN_WR_TPEC;
7955 fan_control_commands |=
7956 TPACPI_FAN_CMD_LEVEL |
7957 TPACPI_FAN_CMD_ENABLE;
7958 }
7959 }
7960 }
7961
7962 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
7963 "fan is %s, modes %d, %d\n",
7964 str_supported(fan_status_access_mode != TPACPI_FAN_NONE ||
7965 fan_control_access_mode != TPACPI_FAN_WR_NONE),
7966 fan_status_access_mode, fan_control_access_mode);
7967
7968 /* fan control master switch */
7969 if (!fan_control_allowed) {
7970 fan_control_access_mode = TPACPI_FAN_WR_NONE;
7971 fan_control_commands = 0;
7972 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
7973 "fan control features disabled by parameter\n");
7974 }
7975
7976 /* update fan_control_desired_level */
7977 if (fan_status_access_mode != TPACPI_FAN_NONE)
7978 fan_get_status_safe(NULL);
7979
7980 if (fan_status_access_mode != TPACPI_FAN_NONE ||
7981 fan_control_access_mode != TPACPI_FAN_WR_NONE) {
7982 if (tp_features.second_fan) {
7983 /* attach second fan tachometer */
7984 fan_attributes[ARRAY_SIZE(fan_attributes)-2] =
7985 &dev_attr_fan_fan2_input.attr;
7986 }
7987 rc = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
7988 &fan_attr_group);
7989 if (rc < 0)
7990 return rc;
7991
7992 rc = driver_create_file(&tpacpi_hwmon_pdriver.driver,
7993 &driver_attr_fan_watchdog);
7994 if (rc < 0) {
7995 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
7996 &fan_attr_group);
7997 return rc;
7998 }
7999 return 0;
8000 } else
8001 return 1;
8002 }
8003
8004 static void fan_exit(void)
8005 {
8006 vdbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_FAN,
8007 "cancelling any pending fan watchdog tasks\n");
8008
8009 /* FIXME: can we really do this unconditionally? */
8010 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj, &fan_attr_group);
8011 driver_remove_file(&tpacpi_hwmon_pdriver.driver,
8012 &driver_attr_fan_watchdog);
8013
8014 cancel_delayed_work(&fan_watchdog_task);
8015 flush_workqueue(tpacpi_wq);
8016 }
8017
8018 static void fan_suspend(pm_message_t state)
8019 {
8020 int rc;
8021
8022 if (!fan_control_allowed)
8023 return;
8024
8025 /* Store fan status in cache */
8026 fan_control_resume_level = 0;
8027 rc = fan_get_status_safe(&fan_control_resume_level);
8028 if (rc < 0)
8029 printk(TPACPI_NOTICE
8030 "failed to read fan level for later "
8031 "restore during resume: %d\n", rc);
8032
8033 /* if it is undefined, don't attempt to restore it.
8034 * KEEP THIS LAST */
8035 if (tp_features.fan_ctrl_status_undef)
8036 fan_control_resume_level = 0;
8037 }
8038
8039 static void fan_resume(void)
8040 {
8041 u8 current_level = 7;
8042 bool do_set = false;
8043 int rc;
8044
8045 /* DSDT *always* updates status on resume */
8046 tp_features.fan_ctrl_status_undef = 0;
8047
8048 if (!fan_control_allowed ||
8049 !fan_control_resume_level ||
8050 (fan_get_status_safe(&current_level) < 0))
8051 return;
8052
8053 switch (fan_control_access_mode) {
8054 case TPACPI_FAN_WR_ACPI_SFAN:
8055 /* never decrease fan level */
8056 do_set = (fan_control_resume_level > current_level);
8057 break;
8058 case TPACPI_FAN_WR_ACPI_FANS:
8059 case TPACPI_FAN_WR_TPEC:
8060 /* never decrease fan level, scale is:
8061 * TP_EC_FAN_FULLSPEED > 7 >= TP_EC_FAN_AUTO
8062 *
8063 * We expect the firmware to set either 7 or AUTO, but we
8064 * handle FULLSPEED out of paranoia.
8065 *
8066 * So, we can safely only restore FULLSPEED or 7, anything
8067 * else could slow the fan. Restoring AUTO is useless, at
8068 * best that's exactly what the DSDT already set (it is the
8069 * slower it uses).
8070 *
8071 * Always keep in mind that the DSDT *will* have set the
8072 * fans to what the vendor supposes is the best level. We
8073 * muck with it only to speed the fan up.
8074 */
8075 if (fan_control_resume_level != 7 &&
8076 !(fan_control_resume_level & TP_EC_FAN_FULLSPEED))
8077 return;
8078 else
8079 do_set = !(current_level & TP_EC_FAN_FULLSPEED) &&
8080 (current_level != fan_control_resume_level);
8081 break;
8082 default:
8083 return;
8084 }
8085 if (do_set) {
8086 printk(TPACPI_NOTICE
8087 "restoring fan level to 0x%02x\n",
8088 fan_control_resume_level);
8089 rc = fan_set_level_safe(fan_control_resume_level);
8090 if (rc < 0)
8091 printk(TPACPI_NOTICE
8092 "failed to restore fan level: %d\n", rc);
8093 }
8094 }
8095
8096 static int fan_read(struct seq_file *m)
8097 {
8098 int rc;
8099 u8 status;
8100 unsigned int speed = 0;
8101
8102 switch (fan_status_access_mode) {
8103 case TPACPI_FAN_RD_ACPI_GFAN:
8104 /* 570, 600e/x, 770e, 770x */
8105 rc = fan_get_status_safe(&status);
8106 if (rc < 0)
8107 return rc;
8108
8109 seq_printf(m, "status:\t\t%s\n"
8110 "level:\t\t%d\n",
8111 (status != 0) ? "enabled" : "disabled", status);
8112 break;
8113
8114 case TPACPI_FAN_RD_TPEC:
8115 /* all except 570, 600e/x, 770e, 770x */
8116 rc = fan_get_status_safe(&status);
8117 if (rc < 0)
8118 return rc;
8119
8120 seq_printf(m, "status:\t\t%s\n",
8121 (status != 0) ? "enabled" : "disabled");
8122
8123 rc = fan_get_speed(&speed);
8124 if (rc < 0)
8125 return rc;
8126
8127 seq_printf(m, "speed:\t\t%d\n", speed);
8128
8129 if (status & TP_EC_FAN_FULLSPEED)
8130 /* Disengaged mode takes precedence */
8131 seq_printf(m, "level:\t\tdisengaged\n");
8132 else if (status & TP_EC_FAN_AUTO)
8133 seq_printf(m, "level:\t\tauto\n");
8134 else
8135 seq_printf(m, "level:\t\t%d\n", status);
8136 break;
8137
8138 case TPACPI_FAN_NONE:
8139 default:
8140 seq_printf(m, "status:\t\tnot supported\n");
8141 }
8142
8143 if (fan_control_commands & TPACPI_FAN_CMD_LEVEL) {
8144 seq_printf(m, "commands:\tlevel <level>");
8145
8146 switch (fan_control_access_mode) {
8147 case TPACPI_FAN_WR_ACPI_SFAN:
8148 seq_printf(m, " (<level> is 0-7)\n");
8149 break;
8150
8151 default:
8152 seq_printf(m, " (<level> is 0-7, "
8153 "auto, disengaged, full-speed)\n");
8154 break;
8155 }
8156 }
8157
8158 if (fan_control_commands & TPACPI_FAN_CMD_ENABLE)
8159 seq_printf(m, "commands:\tenable, disable\n"
8160 "commands:\twatchdog <timeout> (<timeout> "
8161 "is 0 (off), 1-120 (seconds))\n");
8162
8163 if (fan_control_commands & TPACPI_FAN_CMD_SPEED)
8164 seq_printf(m, "commands:\tspeed <speed>"
8165 " (<speed> is 0-65535)\n");
8166
8167 return 0;
8168 }
8169
8170 static int fan_write_cmd_level(const char *cmd, int *rc)
8171 {
8172 int level;
8173
8174 if (strlencmp(cmd, "level auto") == 0)
8175 level = TP_EC_FAN_AUTO;
8176 else if ((strlencmp(cmd, "level disengaged") == 0) |
8177 (strlencmp(cmd, "level full-speed") == 0))
8178 level = TP_EC_FAN_FULLSPEED;
8179 else if (sscanf(cmd, "level %d", &level) != 1)
8180 return 0;
8181
8182 *rc = fan_set_level_safe(level);
8183 if (*rc == -ENXIO)
8184 printk(TPACPI_ERR "level command accepted for unsupported "
8185 "access mode %d", fan_control_access_mode);
8186 else if (!*rc)
8187 tpacpi_disclose_usertask("procfs fan",
8188 "set level to %d\n", level);
8189
8190 return 1;
8191 }
8192
8193 static int fan_write_cmd_enable(const char *cmd, int *rc)
8194 {
8195 if (strlencmp(cmd, "enable") != 0)
8196 return 0;
8197
8198 *rc = fan_set_enable();
8199 if (*rc == -ENXIO)
8200 printk(TPACPI_ERR "enable command accepted for unsupported "
8201 "access mode %d", fan_control_access_mode);
8202 else if (!*rc)
8203 tpacpi_disclose_usertask("procfs fan", "enable\n");
8204
8205 return 1;
8206 }
8207
8208 static int fan_write_cmd_disable(const char *cmd, int *rc)
8209 {
8210 if (strlencmp(cmd, "disable") != 0)
8211 return 0;
8212
8213 *rc = fan_set_disable();
8214 if (*rc == -ENXIO)
8215 printk(TPACPI_ERR "disable command accepted for unsupported "
8216 "access mode %d", fan_control_access_mode);
8217 else if (!*rc)
8218 tpacpi_disclose_usertask("procfs fan", "disable\n");
8219
8220 return 1;
8221 }
8222
8223 static int fan_write_cmd_speed(const char *cmd, int *rc)
8224 {
8225 int speed;
8226
8227 /* TODO:
8228 * Support speed <low> <medium> <high> ? */
8229
8230 if (sscanf(cmd, "speed %d", &speed) != 1)
8231 return 0;
8232
8233 *rc = fan_set_speed(speed);
8234 if (*rc == -ENXIO)
8235 printk(TPACPI_ERR "speed command accepted for unsupported "
8236 "access mode %d", fan_control_access_mode);
8237 else if (!*rc)
8238 tpacpi_disclose_usertask("procfs fan",
8239 "set speed to %d\n", speed);
8240
8241 return 1;
8242 }
8243
8244 static int fan_write_cmd_watchdog(const char *cmd, int *rc)
8245 {
8246 int interval;
8247
8248 if (sscanf(cmd, "watchdog %d", &interval) != 1)
8249 return 0;
8250
8251 if (interval < 0 || interval > 120)
8252 *rc = -EINVAL;
8253 else {
8254 fan_watchdog_maxinterval = interval;
8255 tpacpi_disclose_usertask("procfs fan",
8256 "set watchdog timer to %d\n",
8257 interval);
8258 }
8259
8260 return 1;
8261 }
8262
8263 static int fan_write(char *buf)
8264 {
8265 char *cmd;
8266 int rc = 0;
8267
8268 while (!rc && (cmd = next_cmd(&buf))) {
8269 if (!((fan_control_commands & TPACPI_FAN_CMD_LEVEL) &&
8270 fan_write_cmd_level(cmd, &rc)) &&
8271 !((fan_control_commands & TPACPI_FAN_CMD_ENABLE) &&
8272 (fan_write_cmd_enable(cmd, &rc) ||
8273 fan_write_cmd_disable(cmd, &rc) ||
8274 fan_write_cmd_watchdog(cmd, &rc))) &&
8275 !((fan_control_commands & TPACPI_FAN_CMD_SPEED) &&
8276 fan_write_cmd_speed(cmd, &rc))
8277 )
8278 rc = -EINVAL;
8279 else if (!rc)
8280 fan_watchdog_reset();
8281 }
8282
8283 return rc;
8284 }
8285
8286 static struct ibm_struct fan_driver_data = {
8287 .name = "fan",
8288 .read = fan_read,
8289 .write = fan_write,
8290 .exit = fan_exit,
8291 .suspend = fan_suspend,
8292 .resume = fan_resume,
8293 };
8294
8295 /****************************************************************************
8296 ****************************************************************************
8297 *
8298 * Infrastructure
8299 *
8300 ****************************************************************************
8301 ****************************************************************************/
8302
8303 /*
8304 * HKEY event callout for other subdrivers go here
8305 * (yes, it is ugly, but it is quick, safe, and gets the job done
8306 */
8307 static void tpacpi_driver_event(const unsigned int hkey_event)
8308 {
8309 if (ibm_backlight_device) {
8310 switch (hkey_event) {
8311 case TP_HKEY_EV_BRGHT_UP:
8312 case TP_HKEY_EV_BRGHT_DOWN:
8313 tpacpi_brightness_notify_change();
8314 }
8315 }
8316 if (alsa_card) {
8317 switch (hkey_event) {
8318 case TP_HKEY_EV_VOL_UP:
8319 case TP_HKEY_EV_VOL_DOWN:
8320 case TP_HKEY_EV_VOL_MUTE:
8321 volume_alsa_notify_change();
8322 }
8323 }
8324 }
8325
8326 static void hotkey_driver_event(const unsigned int scancode)
8327 {
8328 tpacpi_driver_event(TP_HKEY_EV_HOTKEY_BASE + scancode);
8329 }
8330
8331 /* sysfs name ---------------------------------------------------------- */
8332 static ssize_t thinkpad_acpi_pdev_name_show(struct device *dev,
8333 struct device_attribute *attr,
8334 char *buf)
8335 {
8336 return snprintf(buf, PAGE_SIZE, "%s\n", TPACPI_NAME);
8337 }
8338
8339 static struct device_attribute dev_attr_thinkpad_acpi_pdev_name =
8340 __ATTR(name, S_IRUGO, thinkpad_acpi_pdev_name_show, NULL);
8341
8342 /* --------------------------------------------------------------------- */
8343
8344 /* /proc support */
8345 static struct proc_dir_entry *proc_dir;
8346
8347 /*
8348 * Module and infrastructure proble, init and exit handling
8349 */
8350
8351 static int force_load;
8352
8353 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
8354 static const char * __init str_supported(int is_supported)
8355 {
8356 static char text_unsupported[] __initdata = "not supported";
8357
8358 return (is_supported)? &text_unsupported[4] : &text_unsupported[0];
8359 }
8360 #endif /* CONFIG_THINKPAD_ACPI_DEBUG */
8361
8362 static void ibm_exit(struct ibm_struct *ibm)
8363 {
8364 dbg_printk(TPACPI_DBG_EXIT, "removing %s\n", ibm->name);
8365
8366 list_del_init(&ibm->all_drivers);
8367
8368 if (ibm->flags.acpi_notify_installed) {
8369 dbg_printk(TPACPI_DBG_EXIT,
8370 "%s: acpi_remove_notify_handler\n", ibm->name);
8371 BUG_ON(!ibm->acpi);
8372 acpi_remove_notify_handler(*ibm->acpi->handle,
8373 ibm->acpi->type,
8374 dispatch_acpi_notify);
8375 ibm->flags.acpi_notify_installed = 0;
8376 ibm->flags.acpi_notify_installed = 0;
8377 }
8378
8379 if (ibm->flags.proc_created) {
8380 dbg_printk(TPACPI_DBG_EXIT,
8381 "%s: remove_proc_entry\n", ibm->name);
8382 remove_proc_entry(ibm->name, proc_dir);
8383 ibm->flags.proc_created = 0;
8384 }
8385
8386 if (ibm->flags.acpi_driver_registered) {
8387 dbg_printk(TPACPI_DBG_EXIT,
8388 "%s: acpi_bus_unregister_driver\n", ibm->name);
8389 BUG_ON(!ibm->acpi);
8390 acpi_bus_unregister_driver(ibm->acpi->driver);
8391 kfree(ibm->acpi->driver);
8392 ibm->acpi->driver = NULL;
8393 ibm->flags.acpi_driver_registered = 0;
8394 }
8395
8396 if (ibm->flags.init_called && ibm->exit) {
8397 ibm->exit();
8398 ibm->flags.init_called = 0;
8399 }
8400
8401 dbg_printk(TPACPI_DBG_INIT, "finished removing %s\n", ibm->name);
8402 }
8403
8404 static int __init ibm_init(struct ibm_init_struct *iibm)
8405 {
8406 int ret;
8407 struct ibm_struct *ibm = iibm->data;
8408 struct proc_dir_entry *entry;
8409
8410 BUG_ON(ibm == NULL);
8411
8412 INIT_LIST_HEAD(&ibm->all_drivers);
8413
8414 if (ibm->flags.experimental && !experimental)
8415 return 0;
8416
8417 dbg_printk(TPACPI_DBG_INIT,
8418 "probing for %s\n", ibm->name);
8419
8420 if (iibm->init) {
8421 ret = iibm->init(iibm);
8422 if (ret > 0)
8423 return 0; /* probe failed */
8424 if (ret)
8425 return ret;
8426
8427 ibm->flags.init_called = 1;
8428 }
8429
8430 if (ibm->acpi) {
8431 if (ibm->acpi->hid) {
8432 ret = register_tpacpi_subdriver(ibm);
8433 if (ret)
8434 goto err_out;
8435 }
8436
8437 if (ibm->acpi->notify) {
8438 ret = setup_acpi_notify(ibm);
8439 if (ret == -ENODEV) {
8440 printk(TPACPI_NOTICE "disabling subdriver %s\n",
8441 ibm->name);
8442 ret = 0;
8443 goto err_out;
8444 }
8445 if (ret < 0)
8446 goto err_out;
8447 }
8448 }
8449
8450 dbg_printk(TPACPI_DBG_INIT,
8451 "%s installed\n", ibm->name);
8452
8453 if (ibm->read) {
8454 mode_t mode;
8455
8456 mode = S_IRUGO;
8457 if (ibm->write)
8458 mode |= S_IWUSR;
8459 entry = proc_create_data(ibm->name, mode, proc_dir,
8460 &dispatch_proc_fops, ibm);
8461 if (!entry) {
8462 printk(TPACPI_ERR "unable to create proc entry %s\n",
8463 ibm->name);
8464 ret = -ENODEV;
8465 goto err_out;
8466 }
8467 ibm->flags.proc_created = 1;
8468 }
8469
8470 list_add_tail(&ibm->all_drivers, &tpacpi_all_drivers);
8471
8472 return 0;
8473
8474 err_out:
8475 dbg_printk(TPACPI_DBG_INIT,
8476 "%s: at error exit path with result %d\n",
8477 ibm->name, ret);
8478
8479 ibm_exit(ibm);
8480 return (ret < 0)? ret : 0;
8481 }
8482
8483 /* Probing */
8484
8485 static bool __pure __init tpacpi_is_fw_digit(const char c)
8486 {
8487 return (c >= '0' && c <= '9') || (c >= 'A' && c <= 'Z');
8488 }
8489
8490 /* Most models: xxyTkkWW (#.##c); Ancient 570/600 and -SL lacks (#.##c) */
8491 static bool __pure __init tpacpi_is_valid_fw_id(const char* const s,
8492 const char t)
8493 {
8494 return s && strlen(s) >= 8 &&
8495 tpacpi_is_fw_digit(s[0]) &&
8496 tpacpi_is_fw_digit(s[1]) &&
8497 s[2] == t && s[3] == 'T' &&
8498 tpacpi_is_fw_digit(s[4]) &&
8499 tpacpi_is_fw_digit(s[5]) &&
8500 s[6] == 'W' && s[7] == 'W';
8501 }
8502
8503 /* returns 0 - probe ok, or < 0 - probe error.
8504 * Probe ok doesn't mean thinkpad found.
8505 * On error, kfree() cleanup on tp->* is not performed, caller must do it */
8506 static int __must_check __init get_thinkpad_model_data(
8507 struct thinkpad_id_data *tp)
8508 {
8509 const struct dmi_device *dev = NULL;
8510 char ec_fw_string[18];
8511 char const *s;
8512
8513 if (!tp)
8514 return -EINVAL;
8515
8516 memset(tp, 0, sizeof(*tp));
8517
8518 if (dmi_name_in_vendors("IBM"))
8519 tp->vendor = PCI_VENDOR_ID_IBM;
8520 else if (dmi_name_in_vendors("LENOVO"))
8521 tp->vendor = PCI_VENDOR_ID_LENOVO;
8522 else
8523 return 0;
8524
8525 s = dmi_get_system_info(DMI_BIOS_VERSION);
8526 tp->bios_version_str = kstrdup(s, GFP_KERNEL);
8527 if (s && !tp->bios_version_str)
8528 return -ENOMEM;
8529
8530 /* Really ancient ThinkPad 240X will fail this, which is fine */
8531 if (!tpacpi_is_valid_fw_id(tp->bios_version_str, 'E'))
8532 return 0;
8533
8534 tp->bios_model = tp->bios_version_str[0]
8535 | (tp->bios_version_str[1] << 8);
8536 tp->bios_release = (tp->bios_version_str[4] << 8)
8537 | tp->bios_version_str[5];
8538
8539 /*
8540 * ThinkPad T23 or newer, A31 or newer, R50e or newer,
8541 * X32 or newer, all Z series; Some models must have an
8542 * up-to-date BIOS or they will not be detected.
8543 *
8544 * See http://thinkwiki.org/wiki/List_of_DMI_IDs
8545 */
8546 while ((dev = dmi_find_device(DMI_DEV_TYPE_OEM_STRING, NULL, dev))) {
8547 if (sscanf(dev->name,
8548 "IBM ThinkPad Embedded Controller -[%17c",
8549 ec_fw_string) == 1) {
8550 ec_fw_string[sizeof(ec_fw_string) - 1] = 0;
8551 ec_fw_string[strcspn(ec_fw_string, " ]")] = 0;
8552
8553 tp->ec_version_str = kstrdup(ec_fw_string, GFP_KERNEL);
8554 if (!tp->ec_version_str)
8555 return -ENOMEM;
8556
8557 if (tpacpi_is_valid_fw_id(ec_fw_string, 'H')) {
8558 tp->ec_model = ec_fw_string[0]
8559 | (ec_fw_string[1] << 8);
8560 tp->ec_release = (ec_fw_string[4] << 8)
8561 | ec_fw_string[5];
8562 } else {
8563 printk(TPACPI_NOTICE
8564 "ThinkPad firmware release %s "
8565 "doesn't match the known patterns\n",
8566 ec_fw_string);
8567 printk(TPACPI_NOTICE
8568 "please report this to %s\n",
8569 TPACPI_MAIL);
8570 }
8571 break;
8572 }
8573 }
8574
8575 s = dmi_get_system_info(DMI_PRODUCT_VERSION);
8576 if (s && !strnicmp(s, "ThinkPad", 8)) {
8577 tp->model_str = kstrdup(s, GFP_KERNEL);
8578 if (!tp->model_str)
8579 return -ENOMEM;
8580 }
8581
8582 s = dmi_get_system_info(DMI_PRODUCT_NAME);
8583 tp->nummodel_str = kstrdup(s, GFP_KERNEL);
8584 if (s && !tp->nummodel_str)
8585 return -ENOMEM;
8586
8587 return 0;
8588 }
8589
8590 static int __init probe_for_thinkpad(void)
8591 {
8592 int is_thinkpad;
8593
8594 if (acpi_disabled)
8595 return -ENODEV;
8596
8597 /*
8598 * Non-ancient models have better DMI tagging, but very old models
8599 * don't. tpacpi_is_fw_known() is a cheat to help in that case.
8600 */
8601 is_thinkpad = (thinkpad_id.model_str != NULL) ||
8602 (thinkpad_id.ec_model != 0) ||
8603 tpacpi_is_fw_known();
8604
8605 /* ec is required because many other handles are relative to it */
8606 TPACPI_ACPIHANDLE_INIT(ec);
8607 if (!ec_handle) {
8608 if (is_thinkpad)
8609 printk(TPACPI_ERR
8610 "Not yet supported ThinkPad detected!\n");
8611 return -ENODEV;
8612 }
8613
8614 if (!is_thinkpad && !force_load)
8615 return -ENODEV;
8616
8617 return 0;
8618 }
8619
8620
8621 /* Module init, exit, parameters */
8622
8623 static struct ibm_init_struct ibms_init[] __initdata = {
8624 {
8625 .init = thinkpad_acpi_driver_init,
8626 .data = &thinkpad_acpi_driver_data,
8627 },
8628 {
8629 .init = hotkey_init,
8630 .data = &hotkey_driver_data,
8631 },
8632 {
8633 .init = bluetooth_init,
8634 .data = &bluetooth_driver_data,
8635 },
8636 {
8637 .init = wan_init,
8638 .data = &wan_driver_data,
8639 },
8640 {
8641 .init = uwb_init,
8642 .data = &uwb_driver_data,
8643 },
8644 #ifdef CONFIG_THINKPAD_ACPI_VIDEO
8645 {
8646 .init = video_init,
8647 .data = &video_driver_data,
8648 },
8649 #endif
8650 {
8651 .init = light_init,
8652 .data = &light_driver_data,
8653 },
8654 {
8655 .init = cmos_init,
8656 .data = &cmos_driver_data,
8657 },
8658 {
8659 .init = led_init,
8660 .data = &led_driver_data,
8661 },
8662 {
8663 .init = beep_init,
8664 .data = &beep_driver_data,
8665 },
8666 {
8667 .init = thermal_init,
8668 .data = &thermal_driver_data,
8669 },
8670 {
8671 .data = &ecdump_driver_data,
8672 },
8673 {
8674 .init = brightness_init,
8675 .data = &brightness_driver_data,
8676 },
8677 {
8678 .init = volume_init,
8679 .data = &volume_driver_data,
8680 },
8681 {
8682 .init = fan_init,
8683 .data = &fan_driver_data,
8684 },
8685 };
8686
8687 static int __init set_ibm_param(const char *val, struct kernel_param *kp)
8688 {
8689 unsigned int i;
8690 struct ibm_struct *ibm;
8691
8692 if (!kp || !kp->name || !val)
8693 return -EINVAL;
8694
8695 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
8696 ibm = ibms_init[i].data;
8697 WARN_ON(ibm == NULL);
8698
8699 if (!ibm || !ibm->name)
8700 continue;
8701
8702 if (strcmp(ibm->name, kp->name) == 0 && ibm->write) {
8703 if (strlen(val) > sizeof(ibms_init[i].param) - 2)
8704 return -ENOSPC;
8705 strcpy(ibms_init[i].param, val);
8706 strcat(ibms_init[i].param, ",");
8707 return 0;
8708 }
8709 }
8710
8711 return -EINVAL;
8712 }
8713
8714 module_param(experimental, int, 0444);
8715 MODULE_PARM_DESC(experimental,
8716 "Enables experimental features when non-zero");
8717
8718 module_param_named(debug, dbg_level, uint, 0);
8719 MODULE_PARM_DESC(debug, "Sets debug level bit-mask");
8720
8721 module_param(force_load, bool, 0444);
8722 MODULE_PARM_DESC(force_load,
8723 "Attempts to load the driver even on a "
8724 "mis-identified ThinkPad when true");
8725
8726 module_param_named(fan_control, fan_control_allowed, bool, 0444);
8727 MODULE_PARM_DESC(fan_control,
8728 "Enables setting fan parameters features when true");
8729
8730 module_param_named(brightness_mode, brightness_mode, uint, 0444);
8731 MODULE_PARM_DESC(brightness_mode,
8732 "Selects brightness control strategy: "
8733 "0=auto, 1=EC, 2=UCMS, 3=EC+NVRAM");
8734
8735 module_param(brightness_enable, uint, 0444);
8736 MODULE_PARM_DESC(brightness_enable,
8737 "Enables backlight control when 1, disables when 0");
8738
8739 module_param(hotkey_report_mode, uint, 0444);
8740 MODULE_PARM_DESC(hotkey_report_mode,
8741 "used for backwards compatibility with userspace, "
8742 "see documentation");
8743
8744 module_param_named(volume_mode, volume_mode, uint, 0444);
8745 MODULE_PARM_DESC(volume_mode,
8746 "Selects volume control strategy: "
8747 "0=auto, 1=EC, 2=N/A, 3=EC+NVRAM");
8748
8749 module_param_named(volume_capabilities, volume_capabilities, uint, 0444);
8750 MODULE_PARM_DESC(volume_capabilities,
8751 "Selects the mixer capabilites: "
8752 "0=auto, 1=volume and mute, 2=mute only");
8753
8754 module_param_named(volume_control, volume_control_allowed, bool, 0444);
8755 MODULE_PARM_DESC(volume_control,
8756 "Enables software override for the console audio "
8757 "control when true");
8758
8759 /* ALSA module API parameters */
8760 module_param_named(index, alsa_index, int, 0444);
8761 MODULE_PARM_DESC(index, "ALSA index for the ACPI EC Mixer");
8762 module_param_named(id, alsa_id, charp, 0444);
8763 MODULE_PARM_DESC(id, "ALSA id for the ACPI EC Mixer");
8764 module_param_named(enable, alsa_enable, bool, 0444);
8765 MODULE_PARM_DESC(enable, "Enable the ALSA interface for the ACPI EC Mixer");
8766
8767 #define TPACPI_PARAM(feature) \
8768 module_param_call(feature, set_ibm_param, NULL, NULL, 0); \
8769 MODULE_PARM_DESC(feature, "Simulates thinkpad-acpi procfs command " \
8770 "at module load, see documentation")
8771
8772 TPACPI_PARAM(hotkey);
8773 TPACPI_PARAM(bluetooth);
8774 TPACPI_PARAM(video);
8775 TPACPI_PARAM(light);
8776 TPACPI_PARAM(cmos);
8777 TPACPI_PARAM(led);
8778 TPACPI_PARAM(beep);
8779 TPACPI_PARAM(ecdump);
8780 TPACPI_PARAM(brightness);
8781 TPACPI_PARAM(volume);
8782 TPACPI_PARAM(fan);
8783
8784 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
8785 module_param(dbg_wlswemul, uint, 0444);
8786 MODULE_PARM_DESC(dbg_wlswemul, "Enables WLSW emulation");
8787 module_param_named(wlsw_state, tpacpi_wlsw_emulstate, bool, 0);
8788 MODULE_PARM_DESC(wlsw_state,
8789 "Initial state of the emulated WLSW switch");
8790
8791 module_param(dbg_bluetoothemul, uint, 0444);
8792 MODULE_PARM_DESC(dbg_bluetoothemul, "Enables bluetooth switch emulation");
8793 module_param_named(bluetooth_state, tpacpi_bluetooth_emulstate, bool, 0);
8794 MODULE_PARM_DESC(bluetooth_state,
8795 "Initial state of the emulated bluetooth switch");
8796
8797 module_param(dbg_wwanemul, uint, 0444);
8798 MODULE_PARM_DESC(dbg_wwanemul, "Enables WWAN switch emulation");
8799 module_param_named(wwan_state, tpacpi_wwan_emulstate, bool, 0);
8800 MODULE_PARM_DESC(wwan_state,
8801 "Initial state of the emulated WWAN switch");
8802
8803 module_param(dbg_uwbemul, uint, 0444);
8804 MODULE_PARM_DESC(dbg_uwbemul, "Enables UWB switch emulation");
8805 module_param_named(uwb_state, tpacpi_uwb_emulstate, bool, 0);
8806 MODULE_PARM_DESC(uwb_state,
8807 "Initial state of the emulated UWB switch");
8808 #endif
8809
8810 static void thinkpad_acpi_module_exit(void)
8811 {
8812 struct ibm_struct *ibm, *itmp;
8813
8814 tpacpi_lifecycle = TPACPI_LIFE_EXITING;
8815
8816 list_for_each_entry_safe_reverse(ibm, itmp,
8817 &tpacpi_all_drivers,
8818 all_drivers) {
8819 ibm_exit(ibm);
8820 }
8821
8822 dbg_printk(TPACPI_DBG_INIT, "finished subdriver exit path...\n");
8823
8824 if (tpacpi_inputdev) {
8825 if (tp_features.input_device_registered)
8826 input_unregister_device(tpacpi_inputdev);
8827 else
8828 input_free_device(tpacpi_inputdev);
8829 }
8830
8831 if (tpacpi_hwmon)
8832 hwmon_device_unregister(tpacpi_hwmon);
8833
8834 if (tp_features.sensors_pdev_attrs_registered)
8835 device_remove_file(&tpacpi_sensors_pdev->dev,
8836 &dev_attr_thinkpad_acpi_pdev_name);
8837 if (tpacpi_sensors_pdev)
8838 platform_device_unregister(tpacpi_sensors_pdev);
8839 if (tpacpi_pdev)
8840 platform_device_unregister(tpacpi_pdev);
8841
8842 if (tp_features.sensors_pdrv_attrs_registered)
8843 tpacpi_remove_driver_attributes(&tpacpi_hwmon_pdriver.driver);
8844 if (tp_features.platform_drv_attrs_registered)
8845 tpacpi_remove_driver_attributes(&tpacpi_pdriver.driver);
8846
8847 if (tp_features.sensors_pdrv_registered)
8848 platform_driver_unregister(&tpacpi_hwmon_pdriver);
8849
8850 if (tp_features.platform_drv_registered)
8851 platform_driver_unregister(&tpacpi_pdriver);
8852
8853 if (proc_dir)
8854 remove_proc_entry(TPACPI_PROC_DIR, acpi_root_dir);
8855
8856 if (tpacpi_wq)
8857 destroy_workqueue(tpacpi_wq);
8858
8859 kfree(thinkpad_id.bios_version_str);
8860 kfree(thinkpad_id.ec_version_str);
8861 kfree(thinkpad_id.model_str);
8862 }
8863
8864
8865 static int __init thinkpad_acpi_module_init(void)
8866 {
8867 int ret, i;
8868
8869 tpacpi_lifecycle = TPACPI_LIFE_INIT;
8870
8871 /* Parameter checking */
8872 if (hotkey_report_mode > 2)
8873 return -EINVAL;
8874
8875 /* Driver-level probe */
8876
8877 ret = get_thinkpad_model_data(&thinkpad_id);
8878 if (ret) {
8879 printk(TPACPI_ERR
8880 "unable to get DMI data: %d\n", ret);
8881 thinkpad_acpi_module_exit();
8882 return ret;
8883 }
8884 ret = probe_for_thinkpad();
8885 if (ret) {
8886 thinkpad_acpi_module_exit();
8887 return ret;
8888 }
8889
8890 /* Driver initialization */
8891
8892 TPACPI_ACPIHANDLE_INIT(ecrd);
8893 TPACPI_ACPIHANDLE_INIT(ecwr);
8894
8895 tpacpi_wq = create_singlethread_workqueue(TPACPI_WORKQUEUE_NAME);
8896 if (!tpacpi_wq) {
8897 thinkpad_acpi_module_exit();
8898 return -ENOMEM;
8899 }
8900
8901 proc_dir = proc_mkdir(TPACPI_PROC_DIR, acpi_root_dir);
8902 if (!proc_dir) {
8903 printk(TPACPI_ERR
8904 "unable to create proc dir " TPACPI_PROC_DIR);
8905 thinkpad_acpi_module_exit();
8906 return -ENODEV;
8907 }
8908
8909 ret = platform_driver_register(&tpacpi_pdriver);
8910 if (ret) {
8911 printk(TPACPI_ERR
8912 "unable to register main platform driver\n");
8913 thinkpad_acpi_module_exit();
8914 return ret;
8915 }
8916 tp_features.platform_drv_registered = 1;
8917
8918 ret = platform_driver_register(&tpacpi_hwmon_pdriver);
8919 if (ret) {
8920 printk(TPACPI_ERR
8921 "unable to register hwmon platform driver\n");
8922 thinkpad_acpi_module_exit();
8923 return ret;
8924 }
8925 tp_features.sensors_pdrv_registered = 1;
8926
8927 ret = tpacpi_create_driver_attributes(&tpacpi_pdriver.driver);
8928 if (!ret) {
8929 tp_features.platform_drv_attrs_registered = 1;
8930 ret = tpacpi_create_driver_attributes(
8931 &tpacpi_hwmon_pdriver.driver);
8932 }
8933 if (ret) {
8934 printk(TPACPI_ERR
8935 "unable to create sysfs driver attributes\n");
8936 thinkpad_acpi_module_exit();
8937 return ret;
8938 }
8939 tp_features.sensors_pdrv_attrs_registered = 1;
8940
8941
8942 /* Device initialization */
8943 tpacpi_pdev = platform_device_register_simple(TPACPI_DRVR_NAME, -1,
8944 NULL, 0);
8945 if (IS_ERR(tpacpi_pdev)) {
8946 ret = PTR_ERR(tpacpi_pdev);
8947 tpacpi_pdev = NULL;
8948 printk(TPACPI_ERR "unable to register platform device\n");
8949 thinkpad_acpi_module_exit();
8950 return ret;
8951 }
8952 tpacpi_sensors_pdev = platform_device_register_simple(
8953 TPACPI_HWMON_DRVR_NAME,
8954 -1, NULL, 0);
8955 if (IS_ERR(tpacpi_sensors_pdev)) {
8956 ret = PTR_ERR(tpacpi_sensors_pdev);
8957 tpacpi_sensors_pdev = NULL;
8958 printk(TPACPI_ERR
8959 "unable to register hwmon platform device\n");
8960 thinkpad_acpi_module_exit();
8961 return ret;
8962 }
8963 ret = device_create_file(&tpacpi_sensors_pdev->dev,
8964 &dev_attr_thinkpad_acpi_pdev_name);
8965 if (ret) {
8966 printk(TPACPI_ERR
8967 "unable to create sysfs hwmon device attributes\n");
8968 thinkpad_acpi_module_exit();
8969 return ret;
8970 }
8971 tp_features.sensors_pdev_attrs_registered = 1;
8972 tpacpi_hwmon = hwmon_device_register(&tpacpi_sensors_pdev->dev);
8973 if (IS_ERR(tpacpi_hwmon)) {
8974 ret = PTR_ERR(tpacpi_hwmon);
8975 tpacpi_hwmon = NULL;
8976 printk(TPACPI_ERR "unable to register hwmon device\n");
8977 thinkpad_acpi_module_exit();
8978 return ret;
8979 }
8980 mutex_init(&tpacpi_inputdev_send_mutex);
8981 tpacpi_inputdev = input_allocate_device();
8982 if (!tpacpi_inputdev) {
8983 printk(TPACPI_ERR "unable to allocate input device\n");
8984 thinkpad_acpi_module_exit();
8985 return -ENOMEM;
8986 } else {
8987 /* Prepare input device, but don't register */
8988 tpacpi_inputdev->name = "ThinkPad Extra Buttons";
8989 tpacpi_inputdev->phys = TPACPI_DRVR_NAME "/input0";
8990 tpacpi_inputdev->id.bustype = BUS_HOST;
8991 tpacpi_inputdev->id.vendor = (thinkpad_id.vendor) ?
8992 thinkpad_id.vendor :
8993 PCI_VENDOR_ID_IBM;
8994 tpacpi_inputdev->id.product = TPACPI_HKEY_INPUT_PRODUCT;
8995 tpacpi_inputdev->id.version = TPACPI_HKEY_INPUT_VERSION;
8996 tpacpi_inputdev->dev.parent = &tpacpi_pdev->dev;
8997 }
8998 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
8999 ret = ibm_init(&ibms_init[i]);
9000 if (ret >= 0 && *ibms_init[i].param)
9001 ret = ibms_init[i].data->write(ibms_init[i].param);
9002 if (ret < 0) {
9003 thinkpad_acpi_module_exit();
9004 return ret;
9005 }
9006 }
9007 ret = input_register_device(tpacpi_inputdev);
9008 if (ret < 0) {
9009 printk(TPACPI_ERR "unable to register input device\n");
9010 thinkpad_acpi_module_exit();
9011 return ret;
9012 } else {
9013 tp_features.input_device_registered = 1;
9014 }
9015
9016 tpacpi_lifecycle = TPACPI_LIFE_RUNNING;
9017 return 0;
9018 }
9019
9020 MODULE_ALIAS(TPACPI_DRVR_SHORTNAME);
9021
9022 /*
9023 * This will autoload the driver in almost every ThinkPad
9024 * in widespread use.
9025 *
9026 * Only _VERY_ old models, like the 240, 240x and 570 lack
9027 * the HKEY event interface.
9028 */
9029 MODULE_DEVICE_TABLE(acpi, ibm_htk_device_ids);
9030
9031 /*
9032 * DMI matching for module autoloading
9033 *
9034 * See http://thinkwiki.org/wiki/List_of_DMI_IDs
9035 * See http://thinkwiki.org/wiki/BIOS_Upgrade_Downloads
9036 *
9037 * Only models listed in thinkwiki will be supported, so add yours
9038 * if it is not there yet.
9039 */
9040 #define IBM_BIOS_MODULE_ALIAS(__type) \
9041 MODULE_ALIAS("dmi:bvnIBM:bvr" __type "ET??WW*")
9042
9043 /* Ancient thinkpad BIOSes have to be identified by
9044 * BIOS type or model number, and there are far less
9045 * BIOS types than model numbers... */
9046 IBM_BIOS_MODULE_ALIAS("I[MU]"); /* 570, 570e */
9047
9048 MODULE_AUTHOR("Borislav Deianov <borislav@users.sf.net>");
9049 MODULE_AUTHOR("Henrique de Moraes Holschuh <hmh@hmh.eng.br>");
9050 MODULE_DESCRIPTION(TPACPI_DESC);
9051 MODULE_VERSION(TPACPI_VERSION);
9052 MODULE_LICENSE("GPL");
9053
9054 module_init(thinkpad_acpi_module_init);
9055 module_exit(thinkpad_acpi_module_exit);
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree