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Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394...
[mirror_ubuntu-zesty-kernel.git] / drivers / platform / x86 / thinkpad_acpi.c
1 /*
2 * thinkpad_acpi.c - ThinkPad ACPI Extras
3 *
4 *
5 * Copyright (C) 2004-2005 Borislav Deianov <borislav@users.sf.net>
6 * Copyright (C) 2006-2009 Henrique de Moraes Holschuh <hmh@hmh.eng.br>
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
21 * 02110-1301, USA.
22 */
23
24 #define TPACPI_VERSION "0.23"
25 #define TPACPI_SYSFS_VERSION 0x020400
26
27 /*
28 * Changelog:
29 * 2007-10-20 changelog trimmed down
30 *
31 * 2007-03-27 0.14 renamed to thinkpad_acpi and moved to
32 * drivers/misc.
33 *
34 * 2006-11-22 0.13 new maintainer
35 * changelog now lives in git commit history, and will
36 * not be updated further in-file.
37 *
38 * 2005-03-17 0.11 support for 600e, 770x
39 * thanks to Jamie Lentin <lentinj@dial.pipex.com>
40 *
41 * 2005-01-16 0.9 use MODULE_VERSION
42 * thanks to Henrik Brix Andersen <brix@gentoo.org>
43 * fix parameter passing on module loading
44 * thanks to Rusty Russell <rusty@rustcorp.com.au>
45 * thanks to Jim Radford <radford@blackbean.org>
46 * 2004-11-08 0.8 fix init error case, don't return from a macro
47 * thanks to Chris Wright <chrisw@osdl.org>
48 */
49
50 #include <linux/kernel.h>
51 #include <linux/module.h>
52 #include <linux/init.h>
53 #include <linux/types.h>
54 #include <linux/string.h>
55 #include <linux/list.h>
56 #include <linux/mutex.h>
57 #include <linux/sched.h>
58 #include <linux/kthread.h>
59 #include <linux/freezer.h>
60 #include <linux/delay.h>
61
62 #include <linux/nvram.h>
63 #include <linux/proc_fs.h>
64 #include <linux/sysfs.h>
65 #include <linux/backlight.h>
66 #include <linux/fb.h>
67 #include <linux/platform_device.h>
68 #include <linux/hwmon.h>
69 #include <linux/hwmon-sysfs.h>
70 #include <linux/input.h>
71 #include <linux/leds.h>
72 #include <linux/rfkill.h>
73 #include <asm/uaccess.h>
74
75 #include <linux/dmi.h>
76 #include <linux/jiffies.h>
77 #include <linux/workqueue.h>
78
79 #include <acpi/acpi_drivers.h>
80
81 #include <linux/pci_ids.h>
82
83
84 /* ThinkPad CMOS commands */
85 #define TP_CMOS_VOLUME_DOWN 0
86 #define TP_CMOS_VOLUME_UP 1
87 #define TP_CMOS_VOLUME_MUTE 2
88 #define TP_CMOS_BRIGHTNESS_UP 4
89 #define TP_CMOS_BRIGHTNESS_DOWN 5
90 #define TP_CMOS_THINKLIGHT_ON 12
91 #define TP_CMOS_THINKLIGHT_OFF 13
92
93 /* NVRAM Addresses */
94 enum tp_nvram_addr {
95 TP_NVRAM_ADDR_HK2 = 0x57,
96 TP_NVRAM_ADDR_THINKLIGHT = 0x58,
97 TP_NVRAM_ADDR_VIDEO = 0x59,
98 TP_NVRAM_ADDR_BRIGHTNESS = 0x5e,
99 TP_NVRAM_ADDR_MIXER = 0x60,
100 };
101
102 /* NVRAM bit masks */
103 enum {
104 TP_NVRAM_MASK_HKT_THINKPAD = 0x08,
105 TP_NVRAM_MASK_HKT_ZOOM = 0x20,
106 TP_NVRAM_MASK_HKT_DISPLAY = 0x40,
107 TP_NVRAM_MASK_HKT_HIBERNATE = 0x80,
108 TP_NVRAM_MASK_THINKLIGHT = 0x10,
109 TP_NVRAM_MASK_HKT_DISPEXPND = 0x30,
110 TP_NVRAM_MASK_HKT_BRIGHTNESS = 0x20,
111 TP_NVRAM_MASK_LEVEL_BRIGHTNESS = 0x0f,
112 TP_NVRAM_POS_LEVEL_BRIGHTNESS = 0,
113 TP_NVRAM_MASK_MUTE = 0x40,
114 TP_NVRAM_MASK_HKT_VOLUME = 0x80,
115 TP_NVRAM_MASK_LEVEL_VOLUME = 0x0f,
116 TP_NVRAM_POS_LEVEL_VOLUME = 0,
117 };
118
119 /* ACPI HIDs */
120 #define TPACPI_ACPI_HKEY_HID "IBM0068"
121
122 /* Input IDs */
123 #define TPACPI_HKEY_INPUT_PRODUCT 0x5054 /* "TP" */
124 #define TPACPI_HKEY_INPUT_VERSION 0x4101
125
126 /* ACPI \WGSV commands */
127 enum {
128 TP_ACPI_WGSV_GET_STATE = 0x01, /* Get state information */
129 TP_ACPI_WGSV_PWR_ON_ON_RESUME = 0x02, /* Resume WWAN powered on */
130 TP_ACPI_WGSV_PWR_OFF_ON_RESUME = 0x03, /* Resume WWAN powered off */
131 TP_ACPI_WGSV_SAVE_STATE = 0x04, /* Save state for S4/S5 */
132 };
133
134 /* TP_ACPI_WGSV_GET_STATE bits */
135 enum {
136 TP_ACPI_WGSV_STATE_WWANEXIST = 0x0001, /* WWAN hw available */
137 TP_ACPI_WGSV_STATE_WWANPWR = 0x0002, /* WWAN radio enabled */
138 TP_ACPI_WGSV_STATE_WWANPWRRES = 0x0004, /* WWAN state at resume */
139 TP_ACPI_WGSV_STATE_WWANBIOSOFF = 0x0008, /* WWAN disabled in BIOS */
140 TP_ACPI_WGSV_STATE_BLTHEXIST = 0x0001, /* BLTH hw available */
141 TP_ACPI_WGSV_STATE_BLTHPWR = 0x0002, /* BLTH radio enabled */
142 TP_ACPI_WGSV_STATE_BLTHPWRRES = 0x0004, /* BLTH state at resume */
143 TP_ACPI_WGSV_STATE_BLTHBIOSOFF = 0x0008, /* BLTH disabled in BIOS */
144 TP_ACPI_WGSV_STATE_UWBEXIST = 0x0010, /* UWB hw available */
145 TP_ACPI_WGSV_STATE_UWBPWR = 0x0020, /* UWB radio enabled */
146 };
147
148 /****************************************************************************
149 * Main driver
150 */
151
152 #define TPACPI_NAME "thinkpad"
153 #define TPACPI_DESC "ThinkPad ACPI Extras"
154 #define TPACPI_FILE TPACPI_NAME "_acpi"
155 #define TPACPI_URL "http://ibm-acpi.sf.net/"
156 #define TPACPI_MAIL "ibm-acpi-devel@lists.sourceforge.net"
157
158 #define TPACPI_PROC_DIR "ibm"
159 #define TPACPI_ACPI_EVENT_PREFIX "ibm"
160 #define TPACPI_DRVR_NAME TPACPI_FILE
161 #define TPACPI_DRVR_SHORTNAME "tpacpi"
162 #define TPACPI_HWMON_DRVR_NAME TPACPI_NAME "_hwmon"
163
164 #define TPACPI_NVRAM_KTHREAD_NAME "ktpacpi_nvramd"
165 #define TPACPI_WORKQUEUE_NAME "ktpacpid"
166
167 #define TPACPI_MAX_ACPI_ARGS 3
168
169 /* printk headers */
170 #define TPACPI_LOG TPACPI_FILE ": "
171 #define TPACPI_EMERG KERN_EMERG TPACPI_LOG
172 #define TPACPI_ALERT KERN_ALERT TPACPI_LOG
173 #define TPACPI_CRIT KERN_CRIT TPACPI_LOG
174 #define TPACPI_ERR KERN_ERR TPACPI_LOG
175 #define TPACPI_WARN KERN_WARNING TPACPI_LOG
176 #define TPACPI_NOTICE KERN_NOTICE TPACPI_LOG
177 #define TPACPI_INFO KERN_INFO TPACPI_LOG
178 #define TPACPI_DEBUG KERN_DEBUG TPACPI_LOG
179
180 /* Debugging printk groups */
181 #define TPACPI_DBG_ALL 0xffff
182 #define TPACPI_DBG_DISCLOSETASK 0x8000
183 #define TPACPI_DBG_INIT 0x0001
184 #define TPACPI_DBG_EXIT 0x0002
185 #define TPACPI_DBG_RFKILL 0x0004
186 #define TPACPI_DBG_HKEY 0x0008
187 #define TPACPI_DBG_FAN 0x0010
188 #define TPACPI_DBG_BRGHT 0x0020
189
190 #define onoff(status, bit) ((status) & (1 << (bit)) ? "on" : "off")
191 #define enabled(status, bit) ((status) & (1 << (bit)) ? "enabled" : "disabled")
192 #define strlencmp(a, b) (strncmp((a), (b), strlen(b)))
193
194
195 /****************************************************************************
196 * Driver-wide structs and misc. variables
197 */
198
199 struct ibm_struct;
200
201 struct tp_acpi_drv_struct {
202 const struct acpi_device_id *hid;
203 struct acpi_driver *driver;
204
205 void (*notify) (struct ibm_struct *, u32);
206 acpi_handle *handle;
207 u32 type;
208 struct acpi_device *device;
209 };
210
211 struct ibm_struct {
212 char *name;
213
214 int (*read) (char *);
215 int (*write) (char *);
216 void (*exit) (void);
217 void (*resume) (void);
218 void (*suspend) (pm_message_t state);
219 void (*shutdown) (void);
220
221 struct list_head all_drivers;
222
223 struct tp_acpi_drv_struct *acpi;
224
225 struct {
226 u8 acpi_driver_registered:1;
227 u8 acpi_notify_installed:1;
228 u8 proc_created:1;
229 u8 init_called:1;
230 u8 experimental:1;
231 } flags;
232 };
233
234 struct ibm_init_struct {
235 char param[32];
236
237 int (*init) (struct ibm_init_struct *);
238 struct ibm_struct *data;
239 };
240
241 static struct {
242 #ifdef CONFIG_THINKPAD_ACPI_BAY
243 u32 bay_status:1;
244 u32 bay_eject:1;
245 u32 bay_status2:1;
246 u32 bay_eject2:1;
247 #endif
248 u32 bluetooth:1;
249 u32 hotkey:1;
250 u32 hotkey_mask:1;
251 u32 hotkey_wlsw:1;
252 u32 hotkey_tablet:1;
253 u32 light:1;
254 u32 light_status:1;
255 u32 bright_16levels:1;
256 u32 bright_acpimode:1;
257 u32 wan:1;
258 u32 uwb:1;
259 u32 fan_ctrl_status_undef:1;
260 u32 second_fan:1;
261 u32 beep_needs_two_args:1;
262 u32 input_device_registered:1;
263 u32 platform_drv_registered:1;
264 u32 platform_drv_attrs_registered:1;
265 u32 sensors_pdrv_registered:1;
266 u32 sensors_pdrv_attrs_registered:1;
267 u32 sensors_pdev_attrs_registered:1;
268 u32 hotkey_poll_active:1;
269 } tp_features;
270
271 static struct {
272 u16 hotkey_mask_ff:1;
273 } tp_warned;
274
275 struct thinkpad_id_data {
276 unsigned int vendor; /* ThinkPad vendor:
277 * PCI_VENDOR_ID_IBM/PCI_VENDOR_ID_LENOVO */
278
279 char *bios_version_str; /* Something like 1ZET51WW (1.03z) */
280 char *ec_version_str; /* Something like 1ZHT51WW-1.04a */
281
282 u16 bios_model; /* 1Y = 0x5931, 0 = unknown */
283 u16 ec_model;
284 u16 bios_release; /* 1ZETK1WW = 0x314b, 0 = unknown */
285 u16 ec_release;
286
287 char *model_str; /* ThinkPad T43 */
288 char *nummodel_str; /* 9384A9C for a 9384-A9C model */
289 };
290 static struct thinkpad_id_data thinkpad_id;
291
292 static enum {
293 TPACPI_LIFE_INIT = 0,
294 TPACPI_LIFE_RUNNING,
295 TPACPI_LIFE_EXITING,
296 } tpacpi_lifecycle;
297
298 static int experimental;
299 static u32 dbg_level;
300
301 static struct workqueue_struct *tpacpi_wq;
302
303 enum led_status_t {
304 TPACPI_LED_OFF = 0,
305 TPACPI_LED_ON,
306 TPACPI_LED_BLINK,
307 };
308
309 /* Special LED class that can defer work */
310 struct tpacpi_led_classdev {
311 struct led_classdev led_classdev;
312 struct work_struct work;
313 enum led_status_t new_state;
314 unsigned int led;
315 };
316
317 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
318 static int dbg_wlswemul;
319 static int tpacpi_wlsw_emulstate;
320 static int dbg_bluetoothemul;
321 static int tpacpi_bluetooth_emulstate;
322 static int dbg_wwanemul;
323 static int tpacpi_wwan_emulstate;
324 static int dbg_uwbemul;
325 static int tpacpi_uwb_emulstate;
326 #endif
327
328
329 /*************************************************************************
330 * Debugging helpers
331 */
332
333 #define dbg_printk(a_dbg_level, format, arg...) \
334 do { if (dbg_level & (a_dbg_level)) \
335 printk(TPACPI_DEBUG "%s: " format, __func__ , ## arg); \
336 } while (0)
337
338 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
339 #define vdbg_printk dbg_printk
340 static const char *str_supported(int is_supported);
341 #else
342 #define vdbg_printk(a_dbg_level, format, arg...) \
343 do { } while (0)
344 #endif
345
346 static void tpacpi_log_usertask(const char * const what)
347 {
348 printk(TPACPI_DEBUG "%s: access by process with PID %d\n",
349 what, task_tgid_vnr(current));
350 }
351
352 #define tpacpi_disclose_usertask(what, format, arg...) \
353 do { \
354 if (unlikely( \
355 (dbg_level & TPACPI_DBG_DISCLOSETASK) && \
356 (tpacpi_lifecycle == TPACPI_LIFE_RUNNING))) { \
357 printk(TPACPI_DEBUG "%s: PID %d: " format, \
358 what, task_tgid_vnr(current), ## arg); \
359 } \
360 } while (0)
361
362 /*
363 * Quirk handling helpers
364 *
365 * ThinkPad IDs and versions seen in the field so far
366 * are two-characters from the set [0-9A-Z], i.e. base 36.
367 *
368 * We use values well outside that range as specials.
369 */
370
371 #define TPACPI_MATCH_ANY 0xffffU
372 #define TPACPI_MATCH_UNKNOWN 0U
373
374 /* TPID('1', 'Y') == 0x5931 */
375 #define TPID(__c1, __c2) (((__c2) << 8) | (__c1))
376
377 #define TPACPI_Q_IBM(__id1, __id2, __quirk) \
378 { .vendor = PCI_VENDOR_ID_IBM, \
379 .bios = TPID(__id1, __id2), \
380 .ec = TPACPI_MATCH_ANY, \
381 .quirks = (__quirk) }
382
383 #define TPACPI_Q_LNV(__id1, __id2, __quirk) \
384 { .vendor = PCI_VENDOR_ID_LENOVO, \
385 .bios = TPID(__id1, __id2), \
386 .ec = TPACPI_MATCH_ANY, \
387 .quirks = (__quirk) }
388
389 struct tpacpi_quirk {
390 unsigned int vendor;
391 u16 bios;
392 u16 ec;
393 unsigned long quirks;
394 };
395
396 /**
397 * tpacpi_check_quirks() - search BIOS/EC version on a list
398 * @qlist: array of &struct tpacpi_quirk
399 * @qlist_size: number of elements in @qlist
400 *
401 * Iterates over a quirks list until one is found that matches the
402 * ThinkPad's vendor, BIOS and EC model.
403 *
404 * Returns 0 if nothing matches, otherwise returns the quirks field of
405 * the matching &struct tpacpi_quirk entry.
406 *
407 * The match criteria is: vendor, ec and bios much match.
408 */
409 static unsigned long __init tpacpi_check_quirks(
410 const struct tpacpi_quirk *qlist,
411 unsigned int qlist_size)
412 {
413 while (qlist_size) {
414 if ((qlist->vendor == thinkpad_id.vendor ||
415 qlist->vendor == TPACPI_MATCH_ANY) &&
416 (qlist->bios == thinkpad_id.bios_model ||
417 qlist->bios == TPACPI_MATCH_ANY) &&
418 (qlist->ec == thinkpad_id.ec_model ||
419 qlist->ec == TPACPI_MATCH_ANY))
420 return qlist->quirks;
421
422 qlist_size--;
423 qlist++;
424 }
425 return 0;
426 }
427
428
429 /****************************************************************************
430 ****************************************************************************
431 *
432 * ACPI Helpers and device model
433 *
434 ****************************************************************************
435 ****************************************************************************/
436
437 /*************************************************************************
438 * ACPI basic handles
439 */
440
441 static acpi_handle root_handle;
442
443 #define TPACPI_HANDLE(object, parent, paths...) \
444 static acpi_handle object##_handle; \
445 static acpi_handle *object##_parent = &parent##_handle; \
446 static char *object##_path; \
447 static char *object##_paths[] = { paths }
448
449 TPACPI_HANDLE(ec, root, "\\_SB.PCI0.ISA.EC0", /* 240, 240x */
450 "\\_SB.PCI.ISA.EC", /* 570 */
451 "\\_SB.PCI0.ISA0.EC0", /* 600e/x, 770e, 770x */
452 "\\_SB.PCI0.ISA.EC", /* A21e, A2xm/p, T20-22, X20-21 */
453 "\\_SB.PCI0.AD4S.EC0", /* i1400, R30 */
454 "\\_SB.PCI0.ICH3.EC0", /* R31 */
455 "\\_SB.PCI0.LPC.EC", /* all others */
456 );
457
458 TPACPI_HANDLE(ecrd, ec, "ECRD"); /* 570 */
459 TPACPI_HANDLE(ecwr, ec, "ECWR"); /* 570 */
460
461 TPACPI_HANDLE(cmos, root, "\\UCMS", /* R50, R50e, R50p, R51, */
462 /* T4x, X31, X40 */
463 "\\CMOS", /* A3x, G4x, R32, T23, T30, X22-24, X30 */
464 "\\CMS", /* R40, R40e */
465 ); /* all others */
466
467 TPACPI_HANDLE(hkey, ec, "\\_SB.HKEY", /* 600e/x, 770e, 770x */
468 "^HKEY", /* R30, R31 */
469 "HKEY", /* all others */
470 ); /* 570 */
471
472 TPACPI_HANDLE(vid, root, "\\_SB.PCI.AGP.VGA", /* 570 */
473 "\\_SB.PCI0.AGP0.VID0", /* 600e/x, 770x */
474 "\\_SB.PCI0.VID0", /* 770e */
475 "\\_SB.PCI0.VID", /* A21e, G4x, R50e, X30, X40 */
476 "\\_SB.PCI0.AGP.VID", /* all others */
477 ); /* R30, R31 */
478
479
480 /*************************************************************************
481 * ACPI helpers
482 */
483
484 static int acpi_evalf(acpi_handle handle,
485 void *res, char *method, char *fmt, ...)
486 {
487 char *fmt0 = fmt;
488 struct acpi_object_list params;
489 union acpi_object in_objs[TPACPI_MAX_ACPI_ARGS];
490 struct acpi_buffer result, *resultp;
491 union acpi_object out_obj;
492 acpi_status status;
493 va_list ap;
494 char res_type;
495 int success;
496 int quiet;
497
498 if (!*fmt) {
499 printk(TPACPI_ERR "acpi_evalf() called with empty format\n");
500 return 0;
501 }
502
503 if (*fmt == 'q') {
504 quiet = 1;
505 fmt++;
506 } else
507 quiet = 0;
508
509 res_type = *(fmt++);
510
511 params.count = 0;
512 params.pointer = &in_objs[0];
513
514 va_start(ap, fmt);
515 while (*fmt) {
516 char c = *(fmt++);
517 switch (c) {
518 case 'd': /* int */
519 in_objs[params.count].integer.value = va_arg(ap, int);
520 in_objs[params.count++].type = ACPI_TYPE_INTEGER;
521 break;
522 /* add more types as needed */
523 default:
524 printk(TPACPI_ERR "acpi_evalf() called "
525 "with invalid format character '%c'\n", c);
526 return 0;
527 }
528 }
529 va_end(ap);
530
531 if (res_type != 'v') {
532 result.length = sizeof(out_obj);
533 result.pointer = &out_obj;
534 resultp = &result;
535 } else
536 resultp = NULL;
537
538 status = acpi_evaluate_object(handle, method, &params, resultp);
539
540 switch (res_type) {
541 case 'd': /* int */
542 if (res)
543 *(int *)res = out_obj.integer.value;
544 success = status == AE_OK && out_obj.type == ACPI_TYPE_INTEGER;
545 break;
546 case 'v': /* void */
547 success = status == AE_OK;
548 break;
549 /* add more types as needed */
550 default:
551 printk(TPACPI_ERR "acpi_evalf() called "
552 "with invalid format character '%c'\n", res_type);
553 return 0;
554 }
555
556 if (!success && !quiet)
557 printk(TPACPI_ERR "acpi_evalf(%s, %s, ...) failed: %d\n",
558 method, fmt0, status);
559
560 return success;
561 }
562
563 static int acpi_ec_read(int i, u8 *p)
564 {
565 int v;
566
567 if (ecrd_handle) {
568 if (!acpi_evalf(ecrd_handle, &v, NULL, "dd", i))
569 return 0;
570 *p = v;
571 } else {
572 if (ec_read(i, p) < 0)
573 return 0;
574 }
575
576 return 1;
577 }
578
579 static int acpi_ec_write(int i, u8 v)
580 {
581 if (ecwr_handle) {
582 if (!acpi_evalf(ecwr_handle, NULL, NULL, "vdd", i, v))
583 return 0;
584 } else {
585 if (ec_write(i, v) < 0)
586 return 0;
587 }
588
589 return 1;
590 }
591
592 #if defined(CONFIG_THINKPAD_ACPI_DOCK) || defined(CONFIG_THINKPAD_ACPI_BAY)
593 static int _sta(acpi_handle handle)
594 {
595 int status;
596
597 if (!handle || !acpi_evalf(handle, &status, "_STA", "d"))
598 status = 0;
599
600 return status;
601 }
602 #endif
603
604 static int issue_thinkpad_cmos_command(int cmos_cmd)
605 {
606 if (!cmos_handle)
607 return -ENXIO;
608
609 if (!acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd))
610 return -EIO;
611
612 return 0;
613 }
614
615 /*************************************************************************
616 * ACPI device model
617 */
618
619 #define TPACPI_ACPIHANDLE_INIT(object) \
620 drv_acpi_handle_init(#object, &object##_handle, *object##_parent, \
621 object##_paths, ARRAY_SIZE(object##_paths), &object##_path)
622
623 static void drv_acpi_handle_init(char *name,
624 acpi_handle *handle, acpi_handle parent,
625 char **paths, int num_paths, char **path)
626 {
627 int i;
628 acpi_status status;
629
630 vdbg_printk(TPACPI_DBG_INIT, "trying to locate ACPI handle for %s\n",
631 name);
632
633 for (i = 0; i < num_paths; i++) {
634 status = acpi_get_handle(parent, paths[i], handle);
635 if (ACPI_SUCCESS(status)) {
636 *path = paths[i];
637 dbg_printk(TPACPI_DBG_INIT,
638 "Found ACPI handle %s for %s\n",
639 *path, name);
640 return;
641 }
642 }
643
644 vdbg_printk(TPACPI_DBG_INIT, "ACPI handle for %s not found\n",
645 name);
646 *handle = NULL;
647 }
648
649 static void dispatch_acpi_notify(acpi_handle handle, u32 event, void *data)
650 {
651 struct ibm_struct *ibm = data;
652
653 if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
654 return;
655
656 if (!ibm || !ibm->acpi || !ibm->acpi->notify)
657 return;
658
659 ibm->acpi->notify(ibm, event);
660 }
661
662 static int __init setup_acpi_notify(struct ibm_struct *ibm)
663 {
664 acpi_status status;
665 int rc;
666
667 BUG_ON(!ibm->acpi);
668
669 if (!*ibm->acpi->handle)
670 return 0;
671
672 vdbg_printk(TPACPI_DBG_INIT,
673 "setting up ACPI notify for %s\n", ibm->name);
674
675 rc = acpi_bus_get_device(*ibm->acpi->handle, &ibm->acpi->device);
676 if (rc < 0) {
677 printk(TPACPI_ERR "acpi_bus_get_device(%s) failed: %d\n",
678 ibm->name, rc);
679 return -ENODEV;
680 }
681
682 ibm->acpi->device->driver_data = ibm;
683 sprintf(acpi_device_class(ibm->acpi->device), "%s/%s",
684 TPACPI_ACPI_EVENT_PREFIX,
685 ibm->name);
686
687 status = acpi_install_notify_handler(*ibm->acpi->handle,
688 ibm->acpi->type, dispatch_acpi_notify, ibm);
689 if (ACPI_FAILURE(status)) {
690 if (status == AE_ALREADY_EXISTS) {
691 printk(TPACPI_NOTICE
692 "another device driver is already "
693 "handling %s events\n", ibm->name);
694 } else {
695 printk(TPACPI_ERR
696 "acpi_install_notify_handler(%s) failed: %d\n",
697 ibm->name, status);
698 }
699 return -ENODEV;
700 }
701 ibm->flags.acpi_notify_installed = 1;
702 return 0;
703 }
704
705 static int __init tpacpi_device_add(struct acpi_device *device)
706 {
707 return 0;
708 }
709
710 static int __init register_tpacpi_subdriver(struct ibm_struct *ibm)
711 {
712 int rc;
713
714 dbg_printk(TPACPI_DBG_INIT,
715 "registering %s as an ACPI driver\n", ibm->name);
716
717 BUG_ON(!ibm->acpi);
718
719 ibm->acpi->driver = kzalloc(sizeof(struct acpi_driver), GFP_KERNEL);
720 if (!ibm->acpi->driver) {
721 printk(TPACPI_ERR
722 "failed to allocate memory for ibm->acpi->driver\n");
723 return -ENOMEM;
724 }
725
726 sprintf(ibm->acpi->driver->name, "%s_%s", TPACPI_NAME, ibm->name);
727 ibm->acpi->driver->ids = ibm->acpi->hid;
728
729 ibm->acpi->driver->ops.add = &tpacpi_device_add;
730
731 rc = acpi_bus_register_driver(ibm->acpi->driver);
732 if (rc < 0) {
733 printk(TPACPI_ERR "acpi_bus_register_driver(%s) failed: %d\n",
734 ibm->name, rc);
735 kfree(ibm->acpi->driver);
736 ibm->acpi->driver = NULL;
737 } else if (!rc)
738 ibm->flags.acpi_driver_registered = 1;
739
740 return rc;
741 }
742
743
744 /****************************************************************************
745 ****************************************************************************
746 *
747 * Procfs Helpers
748 *
749 ****************************************************************************
750 ****************************************************************************/
751
752 static int dispatch_procfs_read(char *page, char **start, off_t off,
753 int count, int *eof, void *data)
754 {
755 struct ibm_struct *ibm = data;
756 int len;
757
758 if (!ibm || !ibm->read)
759 return -EINVAL;
760
761 len = ibm->read(page);
762 if (len < 0)
763 return len;
764
765 if (len <= off + count)
766 *eof = 1;
767 *start = page + off;
768 len -= off;
769 if (len > count)
770 len = count;
771 if (len < 0)
772 len = 0;
773
774 return len;
775 }
776
777 static int dispatch_procfs_write(struct file *file,
778 const char __user *userbuf,
779 unsigned long count, void *data)
780 {
781 struct ibm_struct *ibm = data;
782 char *kernbuf;
783 int ret;
784
785 if (!ibm || !ibm->write)
786 return -EINVAL;
787
788 kernbuf = kmalloc(count + 2, GFP_KERNEL);
789 if (!kernbuf)
790 return -ENOMEM;
791
792 if (copy_from_user(kernbuf, userbuf, count)) {
793 kfree(kernbuf);
794 return -EFAULT;
795 }
796
797 kernbuf[count] = 0;
798 strcat(kernbuf, ",");
799 ret = ibm->write(kernbuf);
800 if (ret == 0)
801 ret = count;
802
803 kfree(kernbuf);
804
805 return ret;
806 }
807
808 static char *next_cmd(char **cmds)
809 {
810 char *start = *cmds;
811 char *end;
812
813 while ((end = strchr(start, ',')) && end == start)
814 start = end + 1;
815
816 if (!end)
817 return NULL;
818
819 *end = 0;
820 *cmds = end + 1;
821 return start;
822 }
823
824
825 /****************************************************************************
826 ****************************************************************************
827 *
828 * Device model: input, hwmon and platform
829 *
830 ****************************************************************************
831 ****************************************************************************/
832
833 static struct platform_device *tpacpi_pdev;
834 static struct platform_device *tpacpi_sensors_pdev;
835 static struct device *tpacpi_hwmon;
836 static struct input_dev *tpacpi_inputdev;
837 static struct mutex tpacpi_inputdev_send_mutex;
838 static LIST_HEAD(tpacpi_all_drivers);
839
840 static int tpacpi_suspend_handler(struct platform_device *pdev,
841 pm_message_t state)
842 {
843 struct ibm_struct *ibm, *itmp;
844
845 list_for_each_entry_safe(ibm, itmp,
846 &tpacpi_all_drivers,
847 all_drivers) {
848 if (ibm->suspend)
849 (ibm->suspend)(state);
850 }
851
852 return 0;
853 }
854
855 static int tpacpi_resume_handler(struct platform_device *pdev)
856 {
857 struct ibm_struct *ibm, *itmp;
858
859 list_for_each_entry_safe(ibm, itmp,
860 &tpacpi_all_drivers,
861 all_drivers) {
862 if (ibm->resume)
863 (ibm->resume)();
864 }
865
866 return 0;
867 }
868
869 static void tpacpi_shutdown_handler(struct platform_device *pdev)
870 {
871 struct ibm_struct *ibm, *itmp;
872
873 list_for_each_entry_safe(ibm, itmp,
874 &tpacpi_all_drivers,
875 all_drivers) {
876 if (ibm->shutdown)
877 (ibm->shutdown)();
878 }
879 }
880
881 static struct platform_driver tpacpi_pdriver = {
882 .driver = {
883 .name = TPACPI_DRVR_NAME,
884 .owner = THIS_MODULE,
885 },
886 .suspend = tpacpi_suspend_handler,
887 .resume = tpacpi_resume_handler,
888 .shutdown = tpacpi_shutdown_handler,
889 };
890
891 static struct platform_driver tpacpi_hwmon_pdriver = {
892 .driver = {
893 .name = TPACPI_HWMON_DRVR_NAME,
894 .owner = THIS_MODULE,
895 },
896 };
897
898 /*************************************************************************
899 * sysfs support helpers
900 */
901
902 struct attribute_set {
903 unsigned int members, max_members;
904 struct attribute_group group;
905 };
906
907 struct attribute_set_obj {
908 struct attribute_set s;
909 struct attribute *a;
910 } __attribute__((packed));
911
912 static struct attribute_set *create_attr_set(unsigned int max_members,
913 const char *name)
914 {
915 struct attribute_set_obj *sobj;
916
917 if (max_members == 0)
918 return NULL;
919
920 /* Allocates space for implicit NULL at the end too */
921 sobj = kzalloc(sizeof(struct attribute_set_obj) +
922 max_members * sizeof(struct attribute *),
923 GFP_KERNEL);
924 if (!sobj)
925 return NULL;
926 sobj->s.max_members = max_members;
927 sobj->s.group.attrs = &sobj->a;
928 sobj->s.group.name = name;
929
930 return &sobj->s;
931 }
932
933 #define destroy_attr_set(_set) \
934 kfree(_set);
935
936 /* not multi-threaded safe, use it in a single thread per set */
937 static int add_to_attr_set(struct attribute_set *s, struct attribute *attr)
938 {
939 if (!s || !attr)
940 return -EINVAL;
941
942 if (s->members >= s->max_members)
943 return -ENOMEM;
944
945 s->group.attrs[s->members] = attr;
946 s->members++;
947
948 return 0;
949 }
950
951 static int add_many_to_attr_set(struct attribute_set *s,
952 struct attribute **attr,
953 unsigned int count)
954 {
955 int i, res;
956
957 for (i = 0; i < count; i++) {
958 res = add_to_attr_set(s, attr[i]);
959 if (res)
960 return res;
961 }
962
963 return 0;
964 }
965
966 static void delete_attr_set(struct attribute_set *s, struct kobject *kobj)
967 {
968 sysfs_remove_group(kobj, &s->group);
969 destroy_attr_set(s);
970 }
971
972 #define register_attr_set_with_sysfs(_attr_set, _kobj) \
973 sysfs_create_group(_kobj, &_attr_set->group)
974
975 static int parse_strtoul(const char *buf,
976 unsigned long max, unsigned long *value)
977 {
978 char *endp;
979
980 while (*buf && isspace(*buf))
981 buf++;
982 *value = simple_strtoul(buf, &endp, 0);
983 while (*endp && isspace(*endp))
984 endp++;
985 if (*endp || *value > max)
986 return -EINVAL;
987
988 return 0;
989 }
990
991 static void tpacpi_disable_brightness_delay(void)
992 {
993 if (acpi_evalf(hkey_handle, NULL, "PWMS", "qvd", 0))
994 printk(TPACPI_NOTICE
995 "ACPI backlight control delay disabled\n");
996 }
997
998 static int __init tpacpi_query_bcl_levels(acpi_handle handle)
999 {
1000 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
1001 union acpi_object *obj;
1002 int rc;
1003
1004 if (ACPI_SUCCESS(acpi_evaluate_object(handle, NULL, NULL, &buffer))) {
1005 obj = (union acpi_object *)buffer.pointer;
1006 if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) {
1007 printk(TPACPI_ERR "Unknown _BCL data, "
1008 "please report this to %s\n", TPACPI_MAIL);
1009 rc = 0;
1010 } else {
1011 rc = obj->package.count;
1012 }
1013 } else {
1014 return 0;
1015 }
1016
1017 kfree(buffer.pointer);
1018 return rc;
1019 }
1020
1021 static acpi_status __init tpacpi_acpi_walk_find_bcl(acpi_handle handle,
1022 u32 lvl, void *context, void **rv)
1023 {
1024 char name[ACPI_PATH_SEGMENT_LENGTH];
1025 struct acpi_buffer buffer = { sizeof(name), &name };
1026
1027 if (ACPI_SUCCESS(acpi_get_name(handle, ACPI_SINGLE_NAME, &buffer)) &&
1028 !strncmp("_BCL", name, sizeof(name) - 1)) {
1029 BUG_ON(!rv || !*rv);
1030 **(int **)rv = tpacpi_query_bcl_levels(handle);
1031 return AE_CTRL_TERMINATE;
1032 } else {
1033 return AE_OK;
1034 }
1035 }
1036
1037 /*
1038 * Returns 0 (no ACPI _BCL or _BCL invalid), or size of brightness map
1039 */
1040 static int __init tpacpi_check_std_acpi_brightness_support(void)
1041 {
1042 int status;
1043 int bcl_levels = 0;
1044 void *bcl_ptr = &bcl_levels;
1045
1046 if (!vid_handle) {
1047 TPACPI_ACPIHANDLE_INIT(vid);
1048 }
1049 if (!vid_handle)
1050 return 0;
1051
1052 /*
1053 * Search for a _BCL method, and execute it. This is safe on all
1054 * ThinkPads, and as a side-effect, _BCL will place a Lenovo Vista
1055 * BIOS in ACPI backlight control mode. We do NOT have to care
1056 * about calling the _BCL method in an enabled video device, any
1057 * will do for our purposes.
1058 */
1059
1060 status = acpi_walk_namespace(ACPI_TYPE_METHOD, vid_handle, 3,
1061 tpacpi_acpi_walk_find_bcl, NULL,
1062 &bcl_ptr);
1063
1064 if (ACPI_SUCCESS(status) && bcl_levels > 2) {
1065 tp_features.bright_acpimode = 1;
1066 return (bcl_levels - 2);
1067 }
1068
1069 return 0;
1070 }
1071
1072 static void printk_deprecated_attribute(const char * const what,
1073 const char * const details)
1074 {
1075 tpacpi_log_usertask("deprecated sysfs attribute");
1076 printk(TPACPI_WARN "WARNING: sysfs attribute %s is deprecated and "
1077 "will be removed. %s\n",
1078 what, details);
1079 }
1080
1081 /*************************************************************************
1082 * rfkill and radio control support helpers
1083 */
1084
1085 /*
1086 * ThinkPad-ACPI firmware handling model:
1087 *
1088 * WLSW (master wireless switch) is event-driven, and is common to all
1089 * firmware-controlled radios. It cannot be controlled, just monitored,
1090 * as expected. It overrides all radio state in firmware
1091 *
1092 * The kernel, a masked-off hotkey, and WLSW can change the radio state
1093 * (TODO: verify how WLSW interacts with the returned radio state).
1094 *
1095 * The only time there are shadow radio state changes, is when
1096 * masked-off hotkeys are used.
1097 */
1098
1099 /*
1100 * Internal driver API for radio state:
1101 *
1102 * int: < 0 = error, otherwise enum tpacpi_rfkill_state
1103 * bool: true means radio blocked (off)
1104 */
1105 enum tpacpi_rfkill_state {
1106 TPACPI_RFK_RADIO_OFF = 0,
1107 TPACPI_RFK_RADIO_ON
1108 };
1109
1110 /* rfkill switches */
1111 enum tpacpi_rfk_id {
1112 TPACPI_RFK_BLUETOOTH_SW_ID = 0,
1113 TPACPI_RFK_WWAN_SW_ID,
1114 TPACPI_RFK_UWB_SW_ID,
1115 TPACPI_RFK_SW_MAX
1116 };
1117
1118 static const char *tpacpi_rfkill_names[] = {
1119 [TPACPI_RFK_BLUETOOTH_SW_ID] = "bluetooth",
1120 [TPACPI_RFK_WWAN_SW_ID] = "wwan",
1121 [TPACPI_RFK_UWB_SW_ID] = "uwb",
1122 [TPACPI_RFK_SW_MAX] = NULL
1123 };
1124
1125 /* ThinkPad-ACPI rfkill subdriver */
1126 struct tpacpi_rfk {
1127 struct rfkill *rfkill;
1128 enum tpacpi_rfk_id id;
1129 const struct tpacpi_rfk_ops *ops;
1130 };
1131
1132 struct tpacpi_rfk_ops {
1133 /* firmware interface */
1134 int (*get_status)(void);
1135 int (*set_status)(const enum tpacpi_rfkill_state);
1136 };
1137
1138 static struct tpacpi_rfk *tpacpi_rfkill_switches[TPACPI_RFK_SW_MAX];
1139
1140 /* Query FW and update rfkill sw state for a given rfkill switch */
1141 static int tpacpi_rfk_update_swstate(const struct tpacpi_rfk *tp_rfk)
1142 {
1143 int status;
1144
1145 if (!tp_rfk)
1146 return -ENODEV;
1147
1148 status = (tp_rfk->ops->get_status)();
1149 if (status < 0)
1150 return status;
1151
1152 rfkill_set_sw_state(tp_rfk->rfkill,
1153 (status == TPACPI_RFK_RADIO_OFF));
1154
1155 return status;
1156 }
1157
1158 /* Query FW and update rfkill sw state for all rfkill switches */
1159 static void tpacpi_rfk_update_swstate_all(void)
1160 {
1161 unsigned int i;
1162
1163 for (i = 0; i < TPACPI_RFK_SW_MAX; i++)
1164 tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[i]);
1165 }
1166
1167 /*
1168 * Sync the HW-blocking state of all rfkill switches,
1169 * do notice it causes the rfkill core to schedule uevents
1170 */
1171 static void tpacpi_rfk_update_hwblock_state(bool blocked)
1172 {
1173 unsigned int i;
1174 struct tpacpi_rfk *tp_rfk;
1175
1176 for (i = 0; i < TPACPI_RFK_SW_MAX; i++) {
1177 tp_rfk = tpacpi_rfkill_switches[i];
1178 if (tp_rfk) {
1179 if (rfkill_set_hw_state(tp_rfk->rfkill,
1180 blocked)) {
1181 /* ignore -- we track sw block */
1182 }
1183 }
1184 }
1185 }
1186
1187 /* Call to get the WLSW state from the firmware */
1188 static int hotkey_get_wlsw(void);
1189
1190 /* Call to query WLSW state and update all rfkill switches */
1191 static bool tpacpi_rfk_check_hwblock_state(void)
1192 {
1193 int res = hotkey_get_wlsw();
1194 int hw_blocked;
1195
1196 /* When unknown or unsupported, we have to assume it is unblocked */
1197 if (res < 0)
1198 return false;
1199
1200 hw_blocked = (res == TPACPI_RFK_RADIO_OFF);
1201 tpacpi_rfk_update_hwblock_state(hw_blocked);
1202
1203 return hw_blocked;
1204 }
1205
1206 static int tpacpi_rfk_hook_set_block(void *data, bool blocked)
1207 {
1208 struct tpacpi_rfk *tp_rfk = data;
1209 int res;
1210
1211 dbg_printk(TPACPI_DBG_RFKILL,
1212 "request to change radio state to %s\n",
1213 blocked ? "blocked" : "unblocked");
1214
1215 /* try to set radio state */
1216 res = (tp_rfk->ops->set_status)(blocked ?
1217 TPACPI_RFK_RADIO_OFF : TPACPI_RFK_RADIO_ON);
1218
1219 /* and update the rfkill core with whatever the FW really did */
1220 tpacpi_rfk_update_swstate(tp_rfk);
1221
1222 return (res < 0) ? res : 0;
1223 }
1224
1225 static const struct rfkill_ops tpacpi_rfk_rfkill_ops = {
1226 .set_block = tpacpi_rfk_hook_set_block,
1227 };
1228
1229 static int __init tpacpi_new_rfkill(const enum tpacpi_rfk_id id,
1230 const struct tpacpi_rfk_ops *tp_rfkops,
1231 const enum rfkill_type rfktype,
1232 const char *name,
1233 const bool set_default)
1234 {
1235 struct tpacpi_rfk *atp_rfk;
1236 int res;
1237 bool sw_state = false;
1238 int sw_status;
1239
1240 BUG_ON(id >= TPACPI_RFK_SW_MAX || tpacpi_rfkill_switches[id]);
1241
1242 atp_rfk = kzalloc(sizeof(struct tpacpi_rfk), GFP_KERNEL);
1243 if (atp_rfk)
1244 atp_rfk->rfkill = rfkill_alloc(name,
1245 &tpacpi_pdev->dev,
1246 rfktype,
1247 &tpacpi_rfk_rfkill_ops,
1248 atp_rfk);
1249 if (!atp_rfk || !atp_rfk->rfkill) {
1250 printk(TPACPI_ERR
1251 "failed to allocate memory for rfkill class\n");
1252 kfree(atp_rfk);
1253 return -ENOMEM;
1254 }
1255
1256 atp_rfk->id = id;
1257 atp_rfk->ops = tp_rfkops;
1258
1259 sw_status = (tp_rfkops->get_status)();
1260 if (sw_status < 0) {
1261 printk(TPACPI_ERR
1262 "failed to read initial state for %s, error %d\n",
1263 name, sw_status);
1264 } else {
1265 sw_state = (sw_status == TPACPI_RFK_RADIO_OFF);
1266 if (set_default) {
1267 /* try to keep the initial state, since we ask the
1268 * firmware to preserve it across S5 in NVRAM */
1269 rfkill_init_sw_state(atp_rfk->rfkill, sw_state);
1270 }
1271 }
1272 rfkill_set_hw_state(atp_rfk->rfkill, tpacpi_rfk_check_hwblock_state());
1273
1274 res = rfkill_register(atp_rfk->rfkill);
1275 if (res < 0) {
1276 printk(TPACPI_ERR
1277 "failed to register %s rfkill switch: %d\n",
1278 name, res);
1279 rfkill_destroy(atp_rfk->rfkill);
1280 kfree(atp_rfk);
1281 return res;
1282 }
1283
1284 tpacpi_rfkill_switches[id] = atp_rfk;
1285 return 0;
1286 }
1287
1288 static void tpacpi_destroy_rfkill(const enum tpacpi_rfk_id id)
1289 {
1290 struct tpacpi_rfk *tp_rfk;
1291
1292 BUG_ON(id >= TPACPI_RFK_SW_MAX);
1293
1294 tp_rfk = tpacpi_rfkill_switches[id];
1295 if (tp_rfk) {
1296 rfkill_unregister(tp_rfk->rfkill);
1297 tpacpi_rfkill_switches[id] = NULL;
1298 kfree(tp_rfk);
1299 }
1300 }
1301
1302 static void printk_deprecated_rfkill_attribute(const char * const what)
1303 {
1304 printk_deprecated_attribute(what,
1305 "Please switch to generic rfkill before year 2010");
1306 }
1307
1308 /* sysfs <radio> enable ------------------------------------------------ */
1309 static ssize_t tpacpi_rfk_sysfs_enable_show(const enum tpacpi_rfk_id id,
1310 struct device_attribute *attr,
1311 char *buf)
1312 {
1313 int status;
1314
1315 printk_deprecated_rfkill_attribute(attr->attr.name);
1316
1317 /* This is in the ABI... */
1318 if (tpacpi_rfk_check_hwblock_state()) {
1319 status = TPACPI_RFK_RADIO_OFF;
1320 } else {
1321 status = tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]);
1322 if (status < 0)
1323 return status;
1324 }
1325
1326 return snprintf(buf, PAGE_SIZE, "%d\n",
1327 (status == TPACPI_RFK_RADIO_ON) ? 1 : 0);
1328 }
1329
1330 static ssize_t tpacpi_rfk_sysfs_enable_store(const enum tpacpi_rfk_id id,
1331 struct device_attribute *attr,
1332 const char *buf, size_t count)
1333 {
1334 unsigned long t;
1335 int res;
1336
1337 printk_deprecated_rfkill_attribute(attr->attr.name);
1338
1339 if (parse_strtoul(buf, 1, &t))
1340 return -EINVAL;
1341
1342 tpacpi_disclose_usertask(attr->attr.name, "set to %ld\n", t);
1343
1344 /* This is in the ABI... */
1345 if (tpacpi_rfk_check_hwblock_state() && !!t)
1346 return -EPERM;
1347
1348 res = tpacpi_rfkill_switches[id]->ops->set_status((!!t) ?
1349 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF);
1350 tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]);
1351
1352 return (res < 0) ? res : count;
1353 }
1354
1355 /* procfs -------------------------------------------------------------- */
1356 static int tpacpi_rfk_procfs_read(const enum tpacpi_rfk_id id, char *p)
1357 {
1358 int len = 0;
1359
1360 if (id >= TPACPI_RFK_SW_MAX)
1361 len += sprintf(p + len, "status:\t\tnot supported\n");
1362 else {
1363 int status;
1364
1365 /* This is in the ABI... */
1366 if (tpacpi_rfk_check_hwblock_state()) {
1367 status = TPACPI_RFK_RADIO_OFF;
1368 } else {
1369 status = tpacpi_rfk_update_swstate(
1370 tpacpi_rfkill_switches[id]);
1371 if (status < 0)
1372 return status;
1373 }
1374
1375 len += sprintf(p + len, "status:\t\t%s\n",
1376 (status == TPACPI_RFK_RADIO_ON) ?
1377 "enabled" : "disabled");
1378 len += sprintf(p + len, "commands:\tenable, disable\n");
1379 }
1380
1381 return len;
1382 }
1383
1384 static int tpacpi_rfk_procfs_write(const enum tpacpi_rfk_id id, char *buf)
1385 {
1386 char *cmd;
1387 int status = -1;
1388 int res = 0;
1389
1390 if (id >= TPACPI_RFK_SW_MAX)
1391 return -ENODEV;
1392
1393 while ((cmd = next_cmd(&buf))) {
1394 if (strlencmp(cmd, "enable") == 0)
1395 status = TPACPI_RFK_RADIO_ON;
1396 else if (strlencmp(cmd, "disable") == 0)
1397 status = TPACPI_RFK_RADIO_OFF;
1398 else
1399 return -EINVAL;
1400 }
1401
1402 if (status != -1) {
1403 tpacpi_disclose_usertask("procfs", "attempt to %s %s\n",
1404 (status == TPACPI_RFK_RADIO_ON) ?
1405 "enable" : "disable",
1406 tpacpi_rfkill_names[id]);
1407 res = (tpacpi_rfkill_switches[id]->ops->set_status)(status);
1408 tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]);
1409 }
1410
1411 return res;
1412 }
1413
1414 /*************************************************************************
1415 * thinkpad-acpi driver attributes
1416 */
1417
1418 /* interface_version --------------------------------------------------- */
1419 static ssize_t tpacpi_driver_interface_version_show(
1420 struct device_driver *drv,
1421 char *buf)
1422 {
1423 return snprintf(buf, PAGE_SIZE, "0x%08x\n", TPACPI_SYSFS_VERSION);
1424 }
1425
1426 static DRIVER_ATTR(interface_version, S_IRUGO,
1427 tpacpi_driver_interface_version_show, NULL);
1428
1429 /* debug_level --------------------------------------------------------- */
1430 static ssize_t tpacpi_driver_debug_show(struct device_driver *drv,
1431 char *buf)
1432 {
1433 return snprintf(buf, PAGE_SIZE, "0x%04x\n", dbg_level);
1434 }
1435
1436 static ssize_t tpacpi_driver_debug_store(struct device_driver *drv,
1437 const char *buf, size_t count)
1438 {
1439 unsigned long t;
1440
1441 if (parse_strtoul(buf, 0xffff, &t))
1442 return -EINVAL;
1443
1444 dbg_level = t;
1445
1446 return count;
1447 }
1448
1449 static DRIVER_ATTR(debug_level, S_IWUSR | S_IRUGO,
1450 tpacpi_driver_debug_show, tpacpi_driver_debug_store);
1451
1452 /* version ------------------------------------------------------------- */
1453 static ssize_t tpacpi_driver_version_show(struct device_driver *drv,
1454 char *buf)
1455 {
1456 return snprintf(buf, PAGE_SIZE, "%s v%s\n",
1457 TPACPI_DESC, TPACPI_VERSION);
1458 }
1459
1460 static DRIVER_ATTR(version, S_IRUGO,
1461 tpacpi_driver_version_show, NULL);
1462
1463 /* --------------------------------------------------------------------- */
1464
1465 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
1466
1467 /* wlsw_emulstate ------------------------------------------------------ */
1468 static ssize_t tpacpi_driver_wlsw_emulstate_show(struct device_driver *drv,
1469 char *buf)
1470 {
1471 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_wlsw_emulstate);
1472 }
1473
1474 static ssize_t tpacpi_driver_wlsw_emulstate_store(struct device_driver *drv,
1475 const char *buf, size_t count)
1476 {
1477 unsigned long t;
1478
1479 if (parse_strtoul(buf, 1, &t))
1480 return -EINVAL;
1481
1482 if (tpacpi_wlsw_emulstate != !!t) {
1483 tpacpi_wlsw_emulstate = !!t;
1484 tpacpi_rfk_update_hwblock_state(!t); /* negative logic */
1485 }
1486
1487 return count;
1488 }
1489
1490 static DRIVER_ATTR(wlsw_emulstate, S_IWUSR | S_IRUGO,
1491 tpacpi_driver_wlsw_emulstate_show,
1492 tpacpi_driver_wlsw_emulstate_store);
1493
1494 /* bluetooth_emulstate ------------------------------------------------- */
1495 static ssize_t tpacpi_driver_bluetooth_emulstate_show(
1496 struct device_driver *drv,
1497 char *buf)
1498 {
1499 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_bluetooth_emulstate);
1500 }
1501
1502 static ssize_t tpacpi_driver_bluetooth_emulstate_store(
1503 struct device_driver *drv,
1504 const char *buf, size_t count)
1505 {
1506 unsigned long t;
1507
1508 if (parse_strtoul(buf, 1, &t))
1509 return -EINVAL;
1510
1511 tpacpi_bluetooth_emulstate = !!t;
1512
1513 return count;
1514 }
1515
1516 static DRIVER_ATTR(bluetooth_emulstate, S_IWUSR | S_IRUGO,
1517 tpacpi_driver_bluetooth_emulstate_show,
1518 tpacpi_driver_bluetooth_emulstate_store);
1519
1520 /* wwan_emulstate ------------------------------------------------- */
1521 static ssize_t tpacpi_driver_wwan_emulstate_show(
1522 struct device_driver *drv,
1523 char *buf)
1524 {
1525 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_wwan_emulstate);
1526 }
1527
1528 static ssize_t tpacpi_driver_wwan_emulstate_store(
1529 struct device_driver *drv,
1530 const char *buf, size_t count)
1531 {
1532 unsigned long t;
1533
1534 if (parse_strtoul(buf, 1, &t))
1535 return -EINVAL;
1536
1537 tpacpi_wwan_emulstate = !!t;
1538
1539 return count;
1540 }
1541
1542 static DRIVER_ATTR(wwan_emulstate, S_IWUSR | S_IRUGO,
1543 tpacpi_driver_wwan_emulstate_show,
1544 tpacpi_driver_wwan_emulstate_store);
1545
1546 /* uwb_emulstate ------------------------------------------------- */
1547 static ssize_t tpacpi_driver_uwb_emulstate_show(
1548 struct device_driver *drv,
1549 char *buf)
1550 {
1551 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_uwb_emulstate);
1552 }
1553
1554 static ssize_t tpacpi_driver_uwb_emulstate_store(
1555 struct device_driver *drv,
1556 const char *buf, size_t count)
1557 {
1558 unsigned long t;
1559
1560 if (parse_strtoul(buf, 1, &t))
1561 return -EINVAL;
1562
1563 tpacpi_uwb_emulstate = !!t;
1564
1565 return count;
1566 }
1567
1568 static DRIVER_ATTR(uwb_emulstate, S_IWUSR | S_IRUGO,
1569 tpacpi_driver_uwb_emulstate_show,
1570 tpacpi_driver_uwb_emulstate_store);
1571 #endif
1572
1573 /* --------------------------------------------------------------------- */
1574
1575 static struct driver_attribute *tpacpi_driver_attributes[] = {
1576 &driver_attr_debug_level, &driver_attr_version,
1577 &driver_attr_interface_version,
1578 };
1579
1580 static int __init tpacpi_create_driver_attributes(struct device_driver *drv)
1581 {
1582 int i, res;
1583
1584 i = 0;
1585 res = 0;
1586 while (!res && i < ARRAY_SIZE(tpacpi_driver_attributes)) {
1587 res = driver_create_file(drv, tpacpi_driver_attributes[i]);
1588 i++;
1589 }
1590
1591 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
1592 if (!res && dbg_wlswemul)
1593 res = driver_create_file(drv, &driver_attr_wlsw_emulstate);
1594 if (!res && dbg_bluetoothemul)
1595 res = driver_create_file(drv, &driver_attr_bluetooth_emulstate);
1596 if (!res && dbg_wwanemul)
1597 res = driver_create_file(drv, &driver_attr_wwan_emulstate);
1598 if (!res && dbg_uwbemul)
1599 res = driver_create_file(drv, &driver_attr_uwb_emulstate);
1600 #endif
1601
1602 return res;
1603 }
1604
1605 static void tpacpi_remove_driver_attributes(struct device_driver *drv)
1606 {
1607 int i;
1608
1609 for (i = 0; i < ARRAY_SIZE(tpacpi_driver_attributes); i++)
1610 driver_remove_file(drv, tpacpi_driver_attributes[i]);
1611
1612 #ifdef THINKPAD_ACPI_DEBUGFACILITIES
1613 driver_remove_file(drv, &driver_attr_wlsw_emulstate);
1614 driver_remove_file(drv, &driver_attr_bluetooth_emulstate);
1615 driver_remove_file(drv, &driver_attr_wwan_emulstate);
1616 driver_remove_file(drv, &driver_attr_uwb_emulstate);
1617 #endif
1618 }
1619
1620 /****************************************************************************
1621 ****************************************************************************
1622 *
1623 * Subdrivers
1624 *
1625 ****************************************************************************
1626 ****************************************************************************/
1627
1628 /*************************************************************************
1629 * thinkpad-acpi init subdriver
1630 */
1631
1632 static int __init thinkpad_acpi_driver_init(struct ibm_init_struct *iibm)
1633 {
1634 printk(TPACPI_INFO "%s v%s\n", TPACPI_DESC, TPACPI_VERSION);
1635 printk(TPACPI_INFO "%s\n", TPACPI_URL);
1636
1637 printk(TPACPI_INFO "ThinkPad BIOS %s, EC %s\n",
1638 (thinkpad_id.bios_version_str) ?
1639 thinkpad_id.bios_version_str : "unknown",
1640 (thinkpad_id.ec_version_str) ?
1641 thinkpad_id.ec_version_str : "unknown");
1642
1643 if (thinkpad_id.vendor && thinkpad_id.model_str)
1644 printk(TPACPI_INFO "%s %s, model %s\n",
1645 (thinkpad_id.vendor == PCI_VENDOR_ID_IBM) ?
1646 "IBM" : ((thinkpad_id.vendor ==
1647 PCI_VENDOR_ID_LENOVO) ?
1648 "Lenovo" : "Unknown vendor"),
1649 thinkpad_id.model_str,
1650 (thinkpad_id.nummodel_str) ?
1651 thinkpad_id.nummodel_str : "unknown");
1652
1653 return 0;
1654 }
1655
1656 static int thinkpad_acpi_driver_read(char *p)
1657 {
1658 int len = 0;
1659
1660 len += sprintf(p + len, "driver:\t\t%s\n", TPACPI_DESC);
1661 len += sprintf(p + len, "version:\t%s\n", TPACPI_VERSION);
1662
1663 return len;
1664 }
1665
1666 static struct ibm_struct thinkpad_acpi_driver_data = {
1667 .name = "driver",
1668 .read = thinkpad_acpi_driver_read,
1669 };
1670
1671 /*************************************************************************
1672 * Hotkey subdriver
1673 */
1674
1675 enum { /* hot key scan codes (derived from ACPI DSDT) */
1676 TP_ACPI_HOTKEYSCAN_FNF1 = 0,
1677 TP_ACPI_HOTKEYSCAN_FNF2,
1678 TP_ACPI_HOTKEYSCAN_FNF3,
1679 TP_ACPI_HOTKEYSCAN_FNF4,
1680 TP_ACPI_HOTKEYSCAN_FNF5,
1681 TP_ACPI_HOTKEYSCAN_FNF6,
1682 TP_ACPI_HOTKEYSCAN_FNF7,
1683 TP_ACPI_HOTKEYSCAN_FNF8,
1684 TP_ACPI_HOTKEYSCAN_FNF9,
1685 TP_ACPI_HOTKEYSCAN_FNF10,
1686 TP_ACPI_HOTKEYSCAN_FNF11,
1687 TP_ACPI_HOTKEYSCAN_FNF12,
1688 TP_ACPI_HOTKEYSCAN_FNBACKSPACE,
1689 TP_ACPI_HOTKEYSCAN_FNINSERT,
1690 TP_ACPI_HOTKEYSCAN_FNDELETE,
1691 TP_ACPI_HOTKEYSCAN_FNHOME,
1692 TP_ACPI_HOTKEYSCAN_FNEND,
1693 TP_ACPI_HOTKEYSCAN_FNPAGEUP,
1694 TP_ACPI_HOTKEYSCAN_FNPAGEDOWN,
1695 TP_ACPI_HOTKEYSCAN_FNSPACE,
1696 TP_ACPI_HOTKEYSCAN_VOLUMEUP,
1697 TP_ACPI_HOTKEYSCAN_VOLUMEDOWN,
1698 TP_ACPI_HOTKEYSCAN_MUTE,
1699 TP_ACPI_HOTKEYSCAN_THINKPAD,
1700 };
1701
1702 enum { /* Keys available through NVRAM polling */
1703 TPACPI_HKEY_NVRAM_KNOWN_MASK = 0x00fb88c0U,
1704 TPACPI_HKEY_NVRAM_GOOD_MASK = 0x00fb8000U,
1705 };
1706
1707 enum { /* Positions of some of the keys in hotkey masks */
1708 TP_ACPI_HKEY_DISPSWTCH_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF7,
1709 TP_ACPI_HKEY_DISPXPAND_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF8,
1710 TP_ACPI_HKEY_HIBERNATE_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF12,
1711 TP_ACPI_HKEY_BRGHTUP_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNHOME,
1712 TP_ACPI_HKEY_BRGHTDWN_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNEND,
1713 TP_ACPI_HKEY_THNKLGHT_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNPAGEUP,
1714 TP_ACPI_HKEY_ZOOM_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNSPACE,
1715 TP_ACPI_HKEY_VOLUP_MASK = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEUP,
1716 TP_ACPI_HKEY_VOLDWN_MASK = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEDOWN,
1717 TP_ACPI_HKEY_MUTE_MASK = 1 << TP_ACPI_HOTKEYSCAN_MUTE,
1718 TP_ACPI_HKEY_THINKPAD_MASK = 1 << TP_ACPI_HOTKEYSCAN_THINKPAD,
1719 };
1720
1721 enum { /* NVRAM to ACPI HKEY group map */
1722 TP_NVRAM_HKEY_GROUP_HK2 = TP_ACPI_HKEY_THINKPAD_MASK |
1723 TP_ACPI_HKEY_ZOOM_MASK |
1724 TP_ACPI_HKEY_DISPSWTCH_MASK |
1725 TP_ACPI_HKEY_HIBERNATE_MASK,
1726 TP_NVRAM_HKEY_GROUP_BRIGHTNESS = TP_ACPI_HKEY_BRGHTUP_MASK |
1727 TP_ACPI_HKEY_BRGHTDWN_MASK,
1728 TP_NVRAM_HKEY_GROUP_VOLUME = TP_ACPI_HKEY_VOLUP_MASK |
1729 TP_ACPI_HKEY_VOLDWN_MASK |
1730 TP_ACPI_HKEY_MUTE_MASK,
1731 };
1732
1733 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1734 struct tp_nvram_state {
1735 u16 thinkpad_toggle:1;
1736 u16 zoom_toggle:1;
1737 u16 display_toggle:1;
1738 u16 thinklight_toggle:1;
1739 u16 hibernate_toggle:1;
1740 u16 displayexp_toggle:1;
1741 u16 display_state:1;
1742 u16 brightness_toggle:1;
1743 u16 volume_toggle:1;
1744 u16 mute:1;
1745
1746 u8 brightness_level;
1747 u8 volume_level;
1748 };
1749
1750 static struct task_struct *tpacpi_hotkey_task;
1751 static u32 hotkey_source_mask; /* bit mask 0=ACPI,1=NVRAM */
1752 static int hotkey_poll_freq = 10; /* Hz */
1753 static struct mutex hotkey_thread_mutex;
1754 static struct mutex hotkey_thread_data_mutex;
1755 static unsigned int hotkey_config_change;
1756
1757 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1758
1759 #define hotkey_source_mask 0U
1760
1761 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1762
1763 static struct mutex hotkey_mutex;
1764
1765 static enum { /* Reasons for waking up */
1766 TP_ACPI_WAKEUP_NONE = 0, /* None or unknown */
1767 TP_ACPI_WAKEUP_BAYEJ, /* Bay ejection request */
1768 TP_ACPI_WAKEUP_UNDOCK, /* Undock request */
1769 } hotkey_wakeup_reason;
1770
1771 static int hotkey_autosleep_ack;
1772
1773 static u32 hotkey_orig_mask;
1774 static u32 hotkey_all_mask;
1775 static u32 hotkey_reserved_mask;
1776 static u32 hotkey_mask;
1777
1778 static unsigned int hotkey_report_mode;
1779
1780 static u16 *hotkey_keycode_map;
1781
1782 static struct attribute_set *hotkey_dev_attributes;
1783
1784 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1785 #define HOTKEY_CONFIG_CRITICAL_START \
1786 do { \
1787 mutex_lock(&hotkey_thread_data_mutex); \
1788 hotkey_config_change++; \
1789 } while (0);
1790 #define HOTKEY_CONFIG_CRITICAL_END \
1791 mutex_unlock(&hotkey_thread_data_mutex);
1792 #else
1793 #define HOTKEY_CONFIG_CRITICAL_START
1794 #define HOTKEY_CONFIG_CRITICAL_END
1795 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1796
1797 /* HKEY.MHKG() return bits */
1798 #define TP_HOTKEY_TABLET_MASK (1 << 3)
1799
1800 static int hotkey_get_wlsw(void)
1801 {
1802 int status;
1803
1804 if (!tp_features.hotkey_wlsw)
1805 return -ENODEV;
1806
1807 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
1808 if (dbg_wlswemul)
1809 return (tpacpi_wlsw_emulstate) ?
1810 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
1811 #endif
1812
1813 if (!acpi_evalf(hkey_handle, &status, "WLSW", "d"))
1814 return -EIO;
1815
1816 return (status) ? TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
1817 }
1818
1819 static int hotkey_get_tablet_mode(int *status)
1820 {
1821 int s;
1822
1823 if (!acpi_evalf(hkey_handle, &s, "MHKG", "d"))
1824 return -EIO;
1825
1826 *status = ((s & TP_HOTKEY_TABLET_MASK) != 0);
1827 return 0;
1828 }
1829
1830 /*
1831 * Call with hotkey_mutex held
1832 */
1833 static int hotkey_mask_get(void)
1834 {
1835 u32 m = 0;
1836
1837 if (tp_features.hotkey_mask) {
1838 if (!acpi_evalf(hkey_handle, &m, "DHKN", "d"))
1839 return -EIO;
1840 }
1841 hotkey_mask = m | (hotkey_source_mask & hotkey_mask);
1842
1843 return 0;
1844 }
1845
1846 /*
1847 * Call with hotkey_mutex held
1848 */
1849 static int hotkey_mask_set(u32 mask)
1850 {
1851 int i;
1852 int rc = 0;
1853
1854 if (tp_features.hotkey_mask) {
1855 if (!tp_warned.hotkey_mask_ff &&
1856 (mask == 0xffff || mask == 0xffffff ||
1857 mask == 0xffffffff)) {
1858 tp_warned.hotkey_mask_ff = 1;
1859 printk(TPACPI_NOTICE
1860 "setting the hotkey mask to 0x%08x is likely "
1861 "not the best way to go about it\n", mask);
1862 printk(TPACPI_NOTICE
1863 "please consider using the driver defaults, "
1864 "and refer to up-to-date thinkpad-acpi "
1865 "documentation\n");
1866 }
1867
1868 HOTKEY_CONFIG_CRITICAL_START
1869 for (i = 0; i < 32; i++) {
1870 u32 m = 1 << i;
1871 /* enable in firmware mask only keys not in NVRAM
1872 * mode, but enable the key in the cached hotkey_mask
1873 * regardless of mode, or the key will end up
1874 * disabled by hotkey_mask_get() */
1875 if (!acpi_evalf(hkey_handle,
1876 NULL, "MHKM", "vdd", i + 1,
1877 !!((mask & ~hotkey_source_mask) & m))) {
1878 rc = -EIO;
1879 break;
1880 } else {
1881 hotkey_mask = (hotkey_mask & ~m) | (mask & m);
1882 }
1883 }
1884 HOTKEY_CONFIG_CRITICAL_END
1885
1886 /* hotkey_mask_get must be called unconditionally below */
1887 if (!hotkey_mask_get() && !rc &&
1888 (hotkey_mask & ~hotkey_source_mask) !=
1889 (mask & ~hotkey_source_mask)) {
1890 printk(TPACPI_NOTICE
1891 "requested hot key mask 0x%08x, but "
1892 "firmware forced it to 0x%08x\n",
1893 mask, hotkey_mask);
1894 }
1895 } else {
1896 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1897 HOTKEY_CONFIG_CRITICAL_START
1898 hotkey_mask = mask & hotkey_source_mask;
1899 HOTKEY_CONFIG_CRITICAL_END
1900 hotkey_mask_get();
1901 if (hotkey_mask != mask) {
1902 printk(TPACPI_NOTICE
1903 "requested hot key mask 0x%08x, "
1904 "forced to 0x%08x (NVRAM poll mask is "
1905 "0x%08x): no firmware mask support\n",
1906 mask, hotkey_mask, hotkey_source_mask);
1907 }
1908 #else
1909 hotkey_mask_get();
1910 rc = -ENXIO;
1911 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1912 }
1913
1914 return rc;
1915 }
1916
1917 static int hotkey_status_get(int *status)
1918 {
1919 if (!acpi_evalf(hkey_handle, status, "DHKC", "d"))
1920 return -EIO;
1921
1922 return 0;
1923 }
1924
1925 static int hotkey_status_set(bool enable)
1926 {
1927 if (!acpi_evalf(hkey_handle, NULL, "MHKC", "vd", enable ? 1 : 0))
1928 return -EIO;
1929
1930 return 0;
1931 }
1932
1933 static void tpacpi_input_send_tabletsw(void)
1934 {
1935 int state;
1936
1937 if (tp_features.hotkey_tablet &&
1938 !hotkey_get_tablet_mode(&state)) {
1939 mutex_lock(&tpacpi_inputdev_send_mutex);
1940
1941 input_report_switch(tpacpi_inputdev,
1942 SW_TABLET_MODE, !!state);
1943 input_sync(tpacpi_inputdev);
1944
1945 mutex_unlock(&tpacpi_inputdev_send_mutex);
1946 }
1947 }
1948
1949 static void tpacpi_input_send_key(unsigned int scancode)
1950 {
1951 unsigned int keycode;
1952
1953 keycode = hotkey_keycode_map[scancode];
1954
1955 if (keycode != KEY_RESERVED) {
1956 mutex_lock(&tpacpi_inputdev_send_mutex);
1957
1958 input_report_key(tpacpi_inputdev, keycode, 1);
1959 if (keycode == KEY_UNKNOWN)
1960 input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN,
1961 scancode);
1962 input_sync(tpacpi_inputdev);
1963
1964 input_report_key(tpacpi_inputdev, keycode, 0);
1965 if (keycode == KEY_UNKNOWN)
1966 input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN,
1967 scancode);
1968 input_sync(tpacpi_inputdev);
1969
1970 mutex_unlock(&tpacpi_inputdev_send_mutex);
1971 }
1972 }
1973
1974 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1975 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver;
1976
1977 static void tpacpi_hotkey_send_key(unsigned int scancode)
1978 {
1979 tpacpi_input_send_key(scancode);
1980 if (hotkey_report_mode < 2) {
1981 acpi_bus_generate_proc_event(ibm_hotkey_acpidriver.device,
1982 0x80, 0x1001 + scancode);
1983 }
1984 }
1985
1986 static void hotkey_read_nvram(struct tp_nvram_state *n, u32 m)
1987 {
1988 u8 d;
1989
1990 if (m & TP_NVRAM_HKEY_GROUP_HK2) {
1991 d = nvram_read_byte(TP_NVRAM_ADDR_HK2);
1992 n->thinkpad_toggle = !!(d & TP_NVRAM_MASK_HKT_THINKPAD);
1993 n->zoom_toggle = !!(d & TP_NVRAM_MASK_HKT_ZOOM);
1994 n->display_toggle = !!(d & TP_NVRAM_MASK_HKT_DISPLAY);
1995 n->hibernate_toggle = !!(d & TP_NVRAM_MASK_HKT_HIBERNATE);
1996 }
1997 if (m & TP_ACPI_HKEY_THNKLGHT_MASK) {
1998 d = nvram_read_byte(TP_NVRAM_ADDR_THINKLIGHT);
1999 n->thinklight_toggle = !!(d & TP_NVRAM_MASK_THINKLIGHT);
2000 }
2001 if (m & TP_ACPI_HKEY_DISPXPAND_MASK) {
2002 d = nvram_read_byte(TP_NVRAM_ADDR_VIDEO);
2003 n->displayexp_toggle =
2004 !!(d & TP_NVRAM_MASK_HKT_DISPEXPND);
2005 }
2006 if (m & TP_NVRAM_HKEY_GROUP_BRIGHTNESS) {
2007 d = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS);
2008 n->brightness_level = (d & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
2009 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
2010 n->brightness_toggle =
2011 !!(d & TP_NVRAM_MASK_HKT_BRIGHTNESS);
2012 }
2013 if (m & TP_NVRAM_HKEY_GROUP_VOLUME) {
2014 d = nvram_read_byte(TP_NVRAM_ADDR_MIXER);
2015 n->volume_level = (d & TP_NVRAM_MASK_LEVEL_VOLUME)
2016 >> TP_NVRAM_POS_LEVEL_VOLUME;
2017 n->mute = !!(d & TP_NVRAM_MASK_MUTE);
2018 n->volume_toggle = !!(d & TP_NVRAM_MASK_HKT_VOLUME);
2019 }
2020 }
2021
2022 #define TPACPI_COMPARE_KEY(__scancode, __member) \
2023 do { \
2024 if ((mask & (1 << __scancode)) && \
2025 oldn->__member != newn->__member) \
2026 tpacpi_hotkey_send_key(__scancode); \
2027 } while (0)
2028
2029 #define TPACPI_MAY_SEND_KEY(__scancode) \
2030 do { if (mask & (1 << __scancode)) \
2031 tpacpi_hotkey_send_key(__scancode); } while (0)
2032
2033 static void hotkey_compare_and_issue_event(struct tp_nvram_state *oldn,
2034 struct tp_nvram_state *newn,
2035 u32 mask)
2036 {
2037 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_THINKPAD, thinkpad_toggle);
2038 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNSPACE, zoom_toggle);
2039 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF7, display_toggle);
2040 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF12, hibernate_toggle);
2041
2042 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNPAGEUP, thinklight_toggle);
2043
2044 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF8, displayexp_toggle);
2045
2046 /* handle volume */
2047 if (oldn->volume_toggle != newn->volume_toggle) {
2048 if (oldn->mute != newn->mute) {
2049 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE);
2050 }
2051 if (oldn->volume_level > newn->volume_level) {
2052 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
2053 } else if (oldn->volume_level < newn->volume_level) {
2054 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
2055 } else if (oldn->mute == newn->mute) {
2056 /* repeated key presses that didn't change state */
2057 if (newn->mute) {
2058 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE);
2059 } else if (newn->volume_level != 0) {
2060 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
2061 } else {
2062 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
2063 }
2064 }
2065 }
2066
2067 /* handle brightness */
2068 if (oldn->brightness_toggle != newn->brightness_toggle) {
2069 if (oldn->brightness_level < newn->brightness_level) {
2070 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
2071 } else if (oldn->brightness_level > newn->brightness_level) {
2072 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
2073 } else {
2074 /* repeated key presses that didn't change state */
2075 if (newn->brightness_level != 0) {
2076 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
2077 } else {
2078 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
2079 }
2080 }
2081 }
2082 }
2083
2084 #undef TPACPI_COMPARE_KEY
2085 #undef TPACPI_MAY_SEND_KEY
2086
2087 static int hotkey_kthread(void *data)
2088 {
2089 struct tp_nvram_state s[2];
2090 u32 mask;
2091 unsigned int si, so;
2092 unsigned long t;
2093 unsigned int change_detector, must_reset;
2094
2095 mutex_lock(&hotkey_thread_mutex);
2096
2097 if (tpacpi_lifecycle == TPACPI_LIFE_EXITING)
2098 goto exit;
2099
2100 set_freezable();
2101
2102 so = 0;
2103 si = 1;
2104 t = 0;
2105
2106 /* Initial state for compares */
2107 mutex_lock(&hotkey_thread_data_mutex);
2108 change_detector = hotkey_config_change;
2109 mask = hotkey_source_mask & hotkey_mask;
2110 mutex_unlock(&hotkey_thread_data_mutex);
2111 hotkey_read_nvram(&s[so], mask);
2112
2113 while (!kthread_should_stop() && hotkey_poll_freq) {
2114 if (t == 0)
2115 t = 1000/hotkey_poll_freq;
2116 t = msleep_interruptible(t);
2117 if (unlikely(kthread_should_stop()))
2118 break;
2119 must_reset = try_to_freeze();
2120 if (t > 0 && !must_reset)
2121 continue;
2122
2123 mutex_lock(&hotkey_thread_data_mutex);
2124 if (must_reset || hotkey_config_change != change_detector) {
2125 /* forget old state on thaw or config change */
2126 si = so;
2127 t = 0;
2128 change_detector = hotkey_config_change;
2129 }
2130 mask = hotkey_source_mask & hotkey_mask;
2131 mutex_unlock(&hotkey_thread_data_mutex);
2132
2133 if (likely(mask)) {
2134 hotkey_read_nvram(&s[si], mask);
2135 if (likely(si != so)) {
2136 hotkey_compare_and_issue_event(&s[so], &s[si],
2137 mask);
2138 }
2139 }
2140
2141 so = si;
2142 si ^= 1;
2143 }
2144
2145 exit:
2146 mutex_unlock(&hotkey_thread_mutex);
2147 return 0;
2148 }
2149
2150 static void hotkey_poll_stop_sync(void)
2151 {
2152 if (tpacpi_hotkey_task) {
2153 if (frozen(tpacpi_hotkey_task) ||
2154 freezing(tpacpi_hotkey_task))
2155 thaw_process(tpacpi_hotkey_task);
2156
2157 kthread_stop(tpacpi_hotkey_task);
2158 tpacpi_hotkey_task = NULL;
2159 mutex_lock(&hotkey_thread_mutex);
2160 /* at this point, the thread did exit */
2161 mutex_unlock(&hotkey_thread_mutex);
2162 }
2163 }
2164
2165 /* call with hotkey_mutex held */
2166 static void hotkey_poll_setup(int may_warn)
2167 {
2168 if ((hotkey_source_mask & hotkey_mask) != 0 &&
2169 hotkey_poll_freq > 0 &&
2170 (tpacpi_inputdev->users > 0 || hotkey_report_mode < 2)) {
2171 if (!tpacpi_hotkey_task) {
2172 tpacpi_hotkey_task = kthread_run(hotkey_kthread,
2173 NULL, TPACPI_NVRAM_KTHREAD_NAME);
2174 if (IS_ERR(tpacpi_hotkey_task)) {
2175 tpacpi_hotkey_task = NULL;
2176 printk(TPACPI_ERR
2177 "could not create kernel thread "
2178 "for hotkey polling\n");
2179 }
2180 }
2181 } else {
2182 hotkey_poll_stop_sync();
2183 if (may_warn &&
2184 hotkey_source_mask != 0 && hotkey_poll_freq == 0) {
2185 printk(TPACPI_NOTICE
2186 "hot keys 0x%08x require polling, "
2187 "which is currently disabled\n",
2188 hotkey_source_mask);
2189 }
2190 }
2191 }
2192
2193 static void hotkey_poll_setup_safe(int may_warn)
2194 {
2195 mutex_lock(&hotkey_mutex);
2196 hotkey_poll_setup(may_warn);
2197 mutex_unlock(&hotkey_mutex);
2198 }
2199
2200 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2201
2202 static void hotkey_poll_setup_safe(int __unused)
2203 {
2204 }
2205
2206 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2207
2208 static int hotkey_inputdev_open(struct input_dev *dev)
2209 {
2210 switch (tpacpi_lifecycle) {
2211 case TPACPI_LIFE_INIT:
2212 /*
2213 * hotkey_init will call hotkey_poll_setup_safe
2214 * at the appropriate moment
2215 */
2216 return 0;
2217 case TPACPI_LIFE_EXITING:
2218 return -EBUSY;
2219 case TPACPI_LIFE_RUNNING:
2220 hotkey_poll_setup_safe(0);
2221 return 0;
2222 }
2223
2224 /* Should only happen if tpacpi_lifecycle is corrupt */
2225 BUG();
2226 return -EBUSY;
2227 }
2228
2229 static void hotkey_inputdev_close(struct input_dev *dev)
2230 {
2231 /* disable hotkey polling when possible */
2232 if (tpacpi_lifecycle == TPACPI_LIFE_RUNNING)
2233 hotkey_poll_setup_safe(0);
2234 }
2235
2236 /* sysfs hotkey enable ------------------------------------------------- */
2237 static ssize_t hotkey_enable_show(struct device *dev,
2238 struct device_attribute *attr,
2239 char *buf)
2240 {
2241 int res, status;
2242
2243 printk_deprecated_attribute("hotkey_enable",
2244 "Hotkey reporting is always enabled");
2245
2246 res = hotkey_status_get(&status);
2247 if (res)
2248 return res;
2249
2250 return snprintf(buf, PAGE_SIZE, "%d\n", status);
2251 }
2252
2253 static ssize_t hotkey_enable_store(struct device *dev,
2254 struct device_attribute *attr,
2255 const char *buf, size_t count)
2256 {
2257 unsigned long t;
2258
2259 printk_deprecated_attribute("hotkey_enable",
2260 "Hotkeys can be disabled through hotkey_mask");
2261
2262 if (parse_strtoul(buf, 1, &t))
2263 return -EINVAL;
2264
2265 if (t == 0)
2266 return -EPERM;
2267
2268 return count;
2269 }
2270
2271 static struct device_attribute dev_attr_hotkey_enable =
2272 __ATTR(hotkey_enable, S_IWUSR | S_IRUGO,
2273 hotkey_enable_show, hotkey_enable_store);
2274
2275 /* sysfs hotkey mask --------------------------------------------------- */
2276 static ssize_t hotkey_mask_show(struct device *dev,
2277 struct device_attribute *attr,
2278 char *buf)
2279 {
2280 int res;
2281
2282 if (mutex_lock_killable(&hotkey_mutex))
2283 return -ERESTARTSYS;
2284 res = hotkey_mask_get();
2285 mutex_unlock(&hotkey_mutex);
2286
2287 return (res)?
2288 res : snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_mask);
2289 }
2290
2291 static ssize_t hotkey_mask_store(struct device *dev,
2292 struct device_attribute *attr,
2293 const char *buf, size_t count)
2294 {
2295 unsigned long t;
2296 int res;
2297
2298 if (parse_strtoul(buf, 0xffffffffUL, &t))
2299 return -EINVAL;
2300
2301 if (mutex_lock_killable(&hotkey_mutex))
2302 return -ERESTARTSYS;
2303
2304 res = hotkey_mask_set(t);
2305
2306 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2307 hotkey_poll_setup(1);
2308 #endif
2309
2310 mutex_unlock(&hotkey_mutex);
2311
2312 tpacpi_disclose_usertask("hotkey_mask", "set to 0x%08lx\n", t);
2313
2314 return (res) ? res : count;
2315 }
2316
2317 static struct device_attribute dev_attr_hotkey_mask =
2318 __ATTR(hotkey_mask, S_IWUSR | S_IRUGO,
2319 hotkey_mask_show, hotkey_mask_store);
2320
2321 /* sysfs hotkey bios_enabled ------------------------------------------- */
2322 static ssize_t hotkey_bios_enabled_show(struct device *dev,
2323 struct device_attribute *attr,
2324 char *buf)
2325 {
2326 return sprintf(buf, "0\n");
2327 }
2328
2329 static struct device_attribute dev_attr_hotkey_bios_enabled =
2330 __ATTR(hotkey_bios_enabled, S_IRUGO, hotkey_bios_enabled_show, NULL);
2331
2332 /* sysfs hotkey bios_mask ---------------------------------------------- */
2333 static ssize_t hotkey_bios_mask_show(struct device *dev,
2334 struct device_attribute *attr,
2335 char *buf)
2336 {
2337 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_orig_mask);
2338 }
2339
2340 static struct device_attribute dev_attr_hotkey_bios_mask =
2341 __ATTR(hotkey_bios_mask, S_IRUGO, hotkey_bios_mask_show, NULL);
2342
2343 /* sysfs hotkey all_mask ----------------------------------------------- */
2344 static ssize_t hotkey_all_mask_show(struct device *dev,
2345 struct device_attribute *attr,
2346 char *buf)
2347 {
2348 return snprintf(buf, PAGE_SIZE, "0x%08x\n",
2349 hotkey_all_mask | hotkey_source_mask);
2350 }
2351
2352 static struct device_attribute dev_attr_hotkey_all_mask =
2353 __ATTR(hotkey_all_mask, S_IRUGO, hotkey_all_mask_show, NULL);
2354
2355 /* sysfs hotkey recommended_mask --------------------------------------- */
2356 static ssize_t hotkey_recommended_mask_show(struct device *dev,
2357 struct device_attribute *attr,
2358 char *buf)
2359 {
2360 return snprintf(buf, PAGE_SIZE, "0x%08x\n",
2361 (hotkey_all_mask | hotkey_source_mask)
2362 & ~hotkey_reserved_mask);
2363 }
2364
2365 static struct device_attribute dev_attr_hotkey_recommended_mask =
2366 __ATTR(hotkey_recommended_mask, S_IRUGO,
2367 hotkey_recommended_mask_show, NULL);
2368
2369 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2370
2371 /* sysfs hotkey hotkey_source_mask ------------------------------------- */
2372 static ssize_t hotkey_source_mask_show(struct device *dev,
2373 struct device_attribute *attr,
2374 char *buf)
2375 {
2376 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_source_mask);
2377 }
2378
2379 static ssize_t hotkey_source_mask_store(struct device *dev,
2380 struct device_attribute *attr,
2381 const char *buf, size_t count)
2382 {
2383 unsigned long t;
2384
2385 if (parse_strtoul(buf, 0xffffffffUL, &t) ||
2386 ((t & ~TPACPI_HKEY_NVRAM_KNOWN_MASK) != 0))
2387 return -EINVAL;
2388
2389 if (mutex_lock_killable(&hotkey_mutex))
2390 return -ERESTARTSYS;
2391
2392 HOTKEY_CONFIG_CRITICAL_START
2393 hotkey_source_mask = t;
2394 HOTKEY_CONFIG_CRITICAL_END
2395
2396 hotkey_poll_setup(1);
2397
2398 mutex_unlock(&hotkey_mutex);
2399
2400 tpacpi_disclose_usertask("hotkey_source_mask", "set to 0x%08lx\n", t);
2401
2402 return count;
2403 }
2404
2405 static struct device_attribute dev_attr_hotkey_source_mask =
2406 __ATTR(hotkey_source_mask, S_IWUSR | S_IRUGO,
2407 hotkey_source_mask_show, hotkey_source_mask_store);
2408
2409 /* sysfs hotkey hotkey_poll_freq --------------------------------------- */
2410 static ssize_t hotkey_poll_freq_show(struct device *dev,
2411 struct device_attribute *attr,
2412 char *buf)
2413 {
2414 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_poll_freq);
2415 }
2416
2417 static ssize_t hotkey_poll_freq_store(struct device *dev,
2418 struct device_attribute *attr,
2419 const char *buf, size_t count)
2420 {
2421 unsigned long t;
2422
2423 if (parse_strtoul(buf, 25, &t))
2424 return -EINVAL;
2425
2426 if (mutex_lock_killable(&hotkey_mutex))
2427 return -ERESTARTSYS;
2428
2429 hotkey_poll_freq = t;
2430
2431 hotkey_poll_setup(1);
2432 mutex_unlock(&hotkey_mutex);
2433
2434 tpacpi_disclose_usertask("hotkey_poll_freq", "set to %lu\n", t);
2435
2436 return count;
2437 }
2438
2439 static struct device_attribute dev_attr_hotkey_poll_freq =
2440 __ATTR(hotkey_poll_freq, S_IWUSR | S_IRUGO,
2441 hotkey_poll_freq_show, hotkey_poll_freq_store);
2442
2443 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2444
2445 /* sysfs hotkey radio_sw (pollable) ------------------------------------ */
2446 static ssize_t hotkey_radio_sw_show(struct device *dev,
2447 struct device_attribute *attr,
2448 char *buf)
2449 {
2450 int res;
2451 res = hotkey_get_wlsw();
2452 if (res < 0)
2453 return res;
2454
2455 /* Opportunistic update */
2456 tpacpi_rfk_update_hwblock_state((res == TPACPI_RFK_RADIO_OFF));
2457
2458 return snprintf(buf, PAGE_SIZE, "%d\n",
2459 (res == TPACPI_RFK_RADIO_OFF) ? 0 : 1);
2460 }
2461
2462 static struct device_attribute dev_attr_hotkey_radio_sw =
2463 __ATTR(hotkey_radio_sw, S_IRUGO, hotkey_radio_sw_show, NULL);
2464
2465 static void hotkey_radio_sw_notify_change(void)
2466 {
2467 if (tp_features.hotkey_wlsw)
2468 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2469 "hotkey_radio_sw");
2470 }
2471
2472 /* sysfs hotkey tablet mode (pollable) --------------------------------- */
2473 static ssize_t hotkey_tablet_mode_show(struct device *dev,
2474 struct device_attribute *attr,
2475 char *buf)
2476 {
2477 int res, s;
2478 res = hotkey_get_tablet_mode(&s);
2479 if (res < 0)
2480 return res;
2481
2482 return snprintf(buf, PAGE_SIZE, "%d\n", !!s);
2483 }
2484
2485 static struct device_attribute dev_attr_hotkey_tablet_mode =
2486 __ATTR(hotkey_tablet_mode, S_IRUGO, hotkey_tablet_mode_show, NULL);
2487
2488 static void hotkey_tablet_mode_notify_change(void)
2489 {
2490 if (tp_features.hotkey_tablet)
2491 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2492 "hotkey_tablet_mode");
2493 }
2494
2495 /* sysfs hotkey report_mode -------------------------------------------- */
2496 static ssize_t hotkey_report_mode_show(struct device *dev,
2497 struct device_attribute *attr,
2498 char *buf)
2499 {
2500 return snprintf(buf, PAGE_SIZE, "%d\n",
2501 (hotkey_report_mode != 0) ? hotkey_report_mode : 1);
2502 }
2503
2504 static struct device_attribute dev_attr_hotkey_report_mode =
2505 __ATTR(hotkey_report_mode, S_IRUGO, hotkey_report_mode_show, NULL);
2506
2507 /* sysfs wakeup reason (pollable) -------------------------------------- */
2508 static ssize_t hotkey_wakeup_reason_show(struct device *dev,
2509 struct device_attribute *attr,
2510 char *buf)
2511 {
2512 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_wakeup_reason);
2513 }
2514
2515 static struct device_attribute dev_attr_hotkey_wakeup_reason =
2516 __ATTR(wakeup_reason, S_IRUGO, hotkey_wakeup_reason_show, NULL);
2517
2518 static void hotkey_wakeup_reason_notify_change(void)
2519 {
2520 if (tp_features.hotkey_mask)
2521 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2522 "wakeup_reason");
2523 }
2524
2525 /* sysfs wakeup hotunplug_complete (pollable) -------------------------- */
2526 static ssize_t hotkey_wakeup_hotunplug_complete_show(struct device *dev,
2527 struct device_attribute *attr,
2528 char *buf)
2529 {
2530 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_autosleep_ack);
2531 }
2532
2533 static struct device_attribute dev_attr_hotkey_wakeup_hotunplug_complete =
2534 __ATTR(wakeup_hotunplug_complete, S_IRUGO,
2535 hotkey_wakeup_hotunplug_complete_show, NULL);
2536
2537 static void hotkey_wakeup_hotunplug_complete_notify_change(void)
2538 {
2539 if (tp_features.hotkey_mask)
2540 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2541 "wakeup_hotunplug_complete");
2542 }
2543
2544 /* --------------------------------------------------------------------- */
2545
2546 static struct attribute *hotkey_attributes[] __initdata = {
2547 &dev_attr_hotkey_enable.attr,
2548 &dev_attr_hotkey_bios_enabled.attr,
2549 &dev_attr_hotkey_report_mode.attr,
2550 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2551 &dev_attr_hotkey_mask.attr,
2552 &dev_attr_hotkey_all_mask.attr,
2553 &dev_attr_hotkey_recommended_mask.attr,
2554 &dev_attr_hotkey_source_mask.attr,
2555 &dev_attr_hotkey_poll_freq.attr,
2556 #endif
2557 };
2558
2559 static struct attribute *hotkey_mask_attributes[] __initdata = {
2560 &dev_attr_hotkey_bios_mask.attr,
2561 #ifndef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2562 &dev_attr_hotkey_mask.attr,
2563 &dev_attr_hotkey_all_mask.attr,
2564 &dev_attr_hotkey_recommended_mask.attr,
2565 #endif
2566 &dev_attr_hotkey_wakeup_reason.attr,
2567 &dev_attr_hotkey_wakeup_hotunplug_complete.attr,
2568 };
2569
2570 /*
2571 * Sync both the hw and sw blocking state of all switches
2572 */
2573 static void tpacpi_send_radiosw_update(void)
2574 {
2575 int wlsw;
2576
2577 /*
2578 * We must sync all rfkill controllers *before* issuing any
2579 * rfkill input events, or we will race the rfkill core input
2580 * handler.
2581 *
2582 * tpacpi_inputdev_send_mutex works as a syncronization point
2583 * for the above.
2584 *
2585 * We optimize to avoid numerous calls to hotkey_get_wlsw.
2586 */
2587
2588 wlsw = hotkey_get_wlsw();
2589
2590 /* Sync hw blocking state first if it is hw-blocked */
2591 if (wlsw == TPACPI_RFK_RADIO_OFF)
2592 tpacpi_rfk_update_hwblock_state(true);
2593
2594 /* Sync sw blocking state */
2595 tpacpi_rfk_update_swstate_all();
2596
2597 /* Sync hw blocking state last if it is hw-unblocked */
2598 if (wlsw == TPACPI_RFK_RADIO_ON)
2599 tpacpi_rfk_update_hwblock_state(false);
2600
2601 /* Issue rfkill input event for WLSW switch */
2602 if (!(wlsw < 0)) {
2603 mutex_lock(&tpacpi_inputdev_send_mutex);
2604
2605 input_report_switch(tpacpi_inputdev,
2606 SW_RFKILL_ALL, (wlsw > 0));
2607 input_sync(tpacpi_inputdev);
2608
2609 mutex_unlock(&tpacpi_inputdev_send_mutex);
2610 }
2611
2612 /*
2613 * this can be unconditional, as we will poll state again
2614 * if userspace uses the notify to read data
2615 */
2616 hotkey_radio_sw_notify_change();
2617 }
2618
2619 static void hotkey_exit(void)
2620 {
2621 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2622 hotkey_poll_stop_sync();
2623 #endif
2624
2625 if (hotkey_dev_attributes)
2626 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
2627
2628 kfree(hotkey_keycode_map);
2629
2630 if (tp_features.hotkey) {
2631 dbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_HKEY,
2632 "restoring original hot key mask\n");
2633 /* no short-circuit boolean operator below! */
2634 if ((hotkey_mask_set(hotkey_orig_mask) |
2635 hotkey_status_set(false)) != 0)
2636 printk(TPACPI_ERR
2637 "failed to restore hot key mask "
2638 "to BIOS defaults\n");
2639 }
2640 }
2641
2642 static int __init hotkey_init(struct ibm_init_struct *iibm)
2643 {
2644 /* Requirements for changing the default keymaps:
2645 *
2646 * 1. Many of the keys are mapped to KEY_RESERVED for very
2647 * good reasons. Do not change them unless you have deep
2648 * knowledge on the IBM and Lenovo ThinkPad firmware for
2649 * the various ThinkPad models. The driver behaves
2650 * differently for KEY_RESERVED: such keys have their
2651 * hot key mask *unset* in mask_recommended, and also
2652 * in the initial hot key mask programmed into the
2653 * firmware at driver load time, which means the firm-
2654 * ware may react very differently if you change them to
2655 * something else;
2656 *
2657 * 2. You must be subscribed to the linux-thinkpad and
2658 * ibm-acpi-devel mailing lists, and you should read the
2659 * list archives since 2007 if you want to change the
2660 * keymaps. This requirement exists so that you will
2661 * know the past history of problems with the thinkpad-
2662 * acpi driver keymaps, and also that you will be
2663 * listening to any bug reports;
2664 *
2665 * 3. Do not send thinkpad-acpi specific patches directly to
2666 * for merging, *ever*. Send them to the linux-acpi
2667 * mailinglist for comments. Merging is to be done only
2668 * through acpi-test and the ACPI maintainer.
2669 *
2670 * If the above is too much to ask, don't change the keymap.
2671 * Ask the thinkpad-acpi maintainer to do it, instead.
2672 */
2673 static u16 ibm_keycode_map[] __initdata = {
2674 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
2675 KEY_FN_F1, KEY_FN_F2, KEY_COFFEE, KEY_SLEEP,
2676 KEY_WLAN, KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
2677 KEY_FN_F9, KEY_FN_F10, KEY_FN_F11, KEY_SUSPEND,
2678
2679 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
2680 KEY_UNKNOWN, /* 0x0C: FN+BACKSPACE */
2681 KEY_UNKNOWN, /* 0x0D: FN+INSERT */
2682 KEY_UNKNOWN, /* 0x0E: FN+DELETE */
2683
2684 /* brightness: firmware always reacts to them, unless
2685 * X.org did some tricks in the radeon BIOS scratch
2686 * registers of *some* models */
2687 KEY_RESERVED, /* 0x0F: FN+HOME (brightness up) */
2688 KEY_RESERVED, /* 0x10: FN+END (brightness down) */
2689
2690 /* Thinklight: firmware always react to it */
2691 KEY_RESERVED, /* 0x11: FN+PGUP (thinklight toggle) */
2692
2693 KEY_UNKNOWN, /* 0x12: FN+PGDOWN */
2694 KEY_ZOOM, /* 0x13: FN+SPACE (zoom) */
2695
2696 /* Volume: firmware always react to it and reprograms
2697 * the built-in *extra* mixer. Never map it to control
2698 * another mixer by default. */
2699 KEY_RESERVED, /* 0x14: VOLUME UP */
2700 KEY_RESERVED, /* 0x15: VOLUME DOWN */
2701 KEY_RESERVED, /* 0x16: MUTE */
2702
2703 KEY_VENDOR, /* 0x17: Thinkpad/AccessIBM/Lenovo */
2704
2705 /* (assignments unknown, please report if found) */
2706 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
2707 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
2708 };
2709 static u16 lenovo_keycode_map[] __initdata = {
2710 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
2711 KEY_FN_F1, KEY_COFFEE, KEY_BATTERY, KEY_SLEEP,
2712 KEY_WLAN, KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
2713 KEY_FN_F9, KEY_FN_F10, KEY_FN_F11, KEY_SUSPEND,
2714
2715 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
2716 KEY_UNKNOWN, /* 0x0C: FN+BACKSPACE */
2717 KEY_UNKNOWN, /* 0x0D: FN+INSERT */
2718 KEY_UNKNOWN, /* 0x0E: FN+DELETE */
2719
2720 /* These either have to go through ACPI video, or
2721 * act like in the IBM ThinkPads, so don't ever
2722 * enable them by default */
2723 KEY_RESERVED, /* 0x0F: FN+HOME (brightness up) */
2724 KEY_RESERVED, /* 0x10: FN+END (brightness down) */
2725
2726 KEY_RESERVED, /* 0x11: FN+PGUP (thinklight toggle) */
2727
2728 KEY_UNKNOWN, /* 0x12: FN+PGDOWN */
2729 KEY_ZOOM, /* 0x13: FN+SPACE (zoom) */
2730
2731 /* Volume: z60/z61, T60 (BIOS version?): firmware always
2732 * react to it and reprograms the built-in *extra* mixer.
2733 * Never map it to control another mixer by default.
2734 *
2735 * T60?, T61, R60?, R61: firmware and EC tries to send
2736 * these over the regular keyboard, so these are no-ops,
2737 * but there are still weird bugs re. MUTE, so do not
2738 * change unless you get test reports from all Lenovo
2739 * models. May cause the BIOS to interfere with the
2740 * HDA mixer.
2741 */
2742 KEY_RESERVED, /* 0x14: VOLUME UP */
2743 KEY_RESERVED, /* 0x15: VOLUME DOWN */
2744 KEY_RESERVED, /* 0x16: MUTE */
2745
2746 KEY_VENDOR, /* 0x17: Thinkpad/AccessIBM/Lenovo */
2747
2748 /* (assignments unknown, please report if found) */
2749 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
2750 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
2751 };
2752
2753 #define TPACPI_HOTKEY_MAP_LEN ARRAY_SIZE(ibm_keycode_map)
2754 #define TPACPI_HOTKEY_MAP_SIZE sizeof(ibm_keycode_map)
2755 #define TPACPI_HOTKEY_MAP_TYPESIZE sizeof(ibm_keycode_map[0])
2756
2757 int res, i;
2758 int status;
2759 int hkeyv;
2760
2761 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
2762 "initializing hotkey subdriver\n");
2763
2764 BUG_ON(!tpacpi_inputdev);
2765 BUG_ON(tpacpi_inputdev->open != NULL ||
2766 tpacpi_inputdev->close != NULL);
2767
2768 TPACPI_ACPIHANDLE_INIT(hkey);
2769 mutex_init(&hotkey_mutex);
2770
2771 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2772 mutex_init(&hotkey_thread_mutex);
2773 mutex_init(&hotkey_thread_data_mutex);
2774 #endif
2775
2776 /* hotkey not supported on 570 */
2777 tp_features.hotkey = hkey_handle != NULL;
2778
2779 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
2780 "hotkeys are %s\n",
2781 str_supported(tp_features.hotkey));
2782
2783 if (!tp_features.hotkey)
2784 return 1;
2785
2786 tpacpi_disable_brightness_delay();
2787
2788 hotkey_dev_attributes = create_attr_set(13, NULL);
2789 if (!hotkey_dev_attributes)
2790 return -ENOMEM;
2791 res = add_many_to_attr_set(hotkey_dev_attributes,
2792 hotkey_attributes,
2793 ARRAY_SIZE(hotkey_attributes));
2794 if (res)
2795 goto err_exit;
2796
2797 /* mask not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
2798 A30, R30, R31, T20-22, X20-21, X22-24. Detected by checking
2799 for HKEY interface version 0x100 */
2800 if (acpi_evalf(hkey_handle, &hkeyv, "MHKV", "qd")) {
2801 if ((hkeyv >> 8) != 1) {
2802 printk(TPACPI_ERR "unknown version of the "
2803 "HKEY interface: 0x%x\n", hkeyv);
2804 printk(TPACPI_ERR "please report this to %s\n",
2805 TPACPI_MAIL);
2806 } else {
2807 /*
2808 * MHKV 0x100 in A31, R40, R40e,
2809 * T4x, X31, and later
2810 */
2811 tp_features.hotkey_mask = 1;
2812 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
2813 "firmware HKEY interface version: 0x%x\n",
2814 hkeyv);
2815 }
2816 }
2817
2818 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
2819 "hotkey masks are %s\n",
2820 str_supported(tp_features.hotkey_mask));
2821
2822 if (tp_features.hotkey_mask) {
2823 if (!acpi_evalf(hkey_handle, &hotkey_all_mask,
2824 "MHKA", "qd")) {
2825 printk(TPACPI_ERR
2826 "missing MHKA handler, "
2827 "please report this to %s\n",
2828 TPACPI_MAIL);
2829 /* FN+F12, FN+F4, FN+F3 */
2830 hotkey_all_mask = 0x080cU;
2831 }
2832 }
2833
2834 /* hotkey_source_mask *must* be zero for
2835 * the first hotkey_mask_get */
2836 if (tp_features.hotkey_mask) {
2837 res = hotkey_mask_get();
2838 if (res)
2839 goto err_exit;
2840
2841 hotkey_orig_mask = hotkey_mask;
2842 res = add_many_to_attr_set(
2843 hotkey_dev_attributes,
2844 hotkey_mask_attributes,
2845 ARRAY_SIZE(hotkey_mask_attributes));
2846 if (res)
2847 goto err_exit;
2848 }
2849
2850 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2851 if (tp_features.hotkey_mask) {
2852 hotkey_source_mask = TPACPI_HKEY_NVRAM_GOOD_MASK
2853 & ~hotkey_all_mask;
2854 } else {
2855 hotkey_source_mask = TPACPI_HKEY_NVRAM_GOOD_MASK;
2856 }
2857
2858 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
2859 "hotkey source mask 0x%08x, polling freq %d\n",
2860 hotkey_source_mask, hotkey_poll_freq);
2861 #endif
2862
2863 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
2864 if (dbg_wlswemul) {
2865 tp_features.hotkey_wlsw = 1;
2866 printk(TPACPI_INFO
2867 "radio switch emulation enabled\n");
2868 } else
2869 #endif
2870 /* Not all thinkpads have a hardware radio switch */
2871 if (acpi_evalf(hkey_handle, &status, "WLSW", "qd")) {
2872 tp_features.hotkey_wlsw = 1;
2873 printk(TPACPI_INFO
2874 "radio switch found; radios are %s\n",
2875 enabled(status, 0));
2876 }
2877 if (tp_features.hotkey_wlsw)
2878 res = add_to_attr_set(hotkey_dev_attributes,
2879 &dev_attr_hotkey_radio_sw.attr);
2880
2881 /* For X41t, X60t, X61t Tablets... */
2882 if (!res && acpi_evalf(hkey_handle, &status, "MHKG", "qd")) {
2883 tp_features.hotkey_tablet = 1;
2884 printk(TPACPI_INFO
2885 "possible tablet mode switch found; "
2886 "ThinkPad in %s mode\n",
2887 (status & TP_HOTKEY_TABLET_MASK)?
2888 "tablet" : "laptop");
2889 res = add_to_attr_set(hotkey_dev_attributes,
2890 &dev_attr_hotkey_tablet_mode.attr);
2891 }
2892
2893 if (!res)
2894 res = register_attr_set_with_sysfs(
2895 hotkey_dev_attributes,
2896 &tpacpi_pdev->dev.kobj);
2897 if (res)
2898 goto err_exit;
2899
2900 /* Set up key map */
2901
2902 hotkey_keycode_map = kmalloc(TPACPI_HOTKEY_MAP_SIZE,
2903 GFP_KERNEL);
2904 if (!hotkey_keycode_map) {
2905 printk(TPACPI_ERR
2906 "failed to allocate memory for key map\n");
2907 res = -ENOMEM;
2908 goto err_exit;
2909 }
2910
2911 if (thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO) {
2912 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
2913 "using Lenovo default hot key map\n");
2914 memcpy(hotkey_keycode_map, &lenovo_keycode_map,
2915 TPACPI_HOTKEY_MAP_SIZE);
2916 } else {
2917 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
2918 "using IBM default hot key map\n");
2919 memcpy(hotkey_keycode_map, &ibm_keycode_map,
2920 TPACPI_HOTKEY_MAP_SIZE);
2921 }
2922
2923 set_bit(EV_KEY, tpacpi_inputdev->evbit);
2924 set_bit(EV_MSC, tpacpi_inputdev->evbit);
2925 set_bit(MSC_SCAN, tpacpi_inputdev->mscbit);
2926 tpacpi_inputdev->keycodesize = TPACPI_HOTKEY_MAP_TYPESIZE;
2927 tpacpi_inputdev->keycodemax = TPACPI_HOTKEY_MAP_LEN;
2928 tpacpi_inputdev->keycode = hotkey_keycode_map;
2929 for (i = 0; i < TPACPI_HOTKEY_MAP_LEN; i++) {
2930 if (hotkey_keycode_map[i] != KEY_RESERVED) {
2931 set_bit(hotkey_keycode_map[i],
2932 tpacpi_inputdev->keybit);
2933 } else {
2934 if (i < sizeof(hotkey_reserved_mask)*8)
2935 hotkey_reserved_mask |= 1 << i;
2936 }
2937 }
2938
2939 if (tp_features.hotkey_wlsw) {
2940 set_bit(EV_SW, tpacpi_inputdev->evbit);
2941 set_bit(SW_RFKILL_ALL, tpacpi_inputdev->swbit);
2942 }
2943 if (tp_features.hotkey_tablet) {
2944 set_bit(EV_SW, tpacpi_inputdev->evbit);
2945 set_bit(SW_TABLET_MODE, tpacpi_inputdev->swbit);
2946 }
2947
2948 /* Do not issue duplicate brightness change events to
2949 * userspace */
2950 if (!tp_features.bright_acpimode)
2951 /* update bright_acpimode... */
2952 tpacpi_check_std_acpi_brightness_support();
2953
2954 if (tp_features.bright_acpimode && acpi_video_backlight_support()) {
2955 printk(TPACPI_INFO
2956 "This ThinkPad has standard ACPI backlight "
2957 "brightness control, supported by the ACPI "
2958 "video driver\n");
2959 printk(TPACPI_NOTICE
2960 "Disabling thinkpad-acpi brightness events "
2961 "by default...\n");
2962
2963 /* The hotkey_reserved_mask change below is not
2964 * necessary while the keys are at KEY_RESERVED in the
2965 * default map, but better safe than sorry, leave it
2966 * here as a marker of what we have to do, especially
2967 * when we finally become able to set this at runtime
2968 * on response to X.org requests */
2969 hotkey_reserved_mask |=
2970 (1 << TP_ACPI_HOTKEYSCAN_FNHOME)
2971 | (1 << TP_ACPI_HOTKEYSCAN_FNEND);
2972 }
2973
2974 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
2975 "enabling firmware HKEY event interface...\n");
2976 res = hotkey_status_set(true);
2977 if (res) {
2978 hotkey_exit();
2979 return res;
2980 }
2981 res = hotkey_mask_set(((hotkey_all_mask | hotkey_source_mask)
2982 & ~hotkey_reserved_mask)
2983 | hotkey_orig_mask);
2984 if (res < 0 && res != -ENXIO) {
2985 hotkey_exit();
2986 return res;
2987 }
2988
2989 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
2990 "legacy ibm/hotkey event reporting over procfs %s\n",
2991 (hotkey_report_mode < 2) ?
2992 "enabled" : "disabled");
2993
2994 tpacpi_inputdev->open = &hotkey_inputdev_open;
2995 tpacpi_inputdev->close = &hotkey_inputdev_close;
2996
2997 hotkey_poll_setup_safe(1);
2998 tpacpi_send_radiosw_update();
2999 tpacpi_input_send_tabletsw();
3000
3001 return 0;
3002
3003 err_exit:
3004 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
3005 hotkey_dev_attributes = NULL;
3006
3007 return (res < 0)? res : 1;
3008 }
3009
3010 static bool hotkey_notify_hotkey(const u32 hkey,
3011 bool *send_acpi_ev,
3012 bool *ignore_acpi_ev)
3013 {
3014 /* 0x1000-0x1FFF: key presses */
3015 unsigned int scancode = hkey & 0xfff;
3016 *send_acpi_ev = true;
3017 *ignore_acpi_ev = false;
3018
3019 if (scancode > 0 && scancode < 0x21) {
3020 scancode--;
3021 if (!(hotkey_source_mask & (1 << scancode))) {
3022 tpacpi_input_send_key(scancode);
3023 *send_acpi_ev = false;
3024 } else {
3025 *ignore_acpi_ev = true;
3026 }
3027 return true;
3028 }
3029 return false;
3030 }
3031
3032 static bool hotkey_notify_wakeup(const u32 hkey,
3033 bool *send_acpi_ev,
3034 bool *ignore_acpi_ev)
3035 {
3036 /* 0x2000-0x2FFF: Wakeup reason */
3037 *send_acpi_ev = true;
3038 *ignore_acpi_ev = false;
3039
3040 switch (hkey) {
3041 case 0x2304: /* suspend, undock */
3042 case 0x2404: /* hibernation, undock */
3043 hotkey_wakeup_reason = TP_ACPI_WAKEUP_UNDOCK;
3044 *ignore_acpi_ev = true;
3045 break;
3046
3047 case 0x2305: /* suspend, bay eject */
3048 case 0x2405: /* hibernation, bay eject */
3049 hotkey_wakeup_reason = TP_ACPI_WAKEUP_BAYEJ;
3050 *ignore_acpi_ev = true;
3051 break;
3052
3053 case 0x2313: /* Battery on critical low level (S3) */
3054 case 0x2413: /* Battery on critical low level (S4) */
3055 printk(TPACPI_ALERT
3056 "EMERGENCY WAKEUP: battery almost empty\n");
3057 /* how to auto-heal: */
3058 /* 2313: woke up from S3, go to S4/S5 */
3059 /* 2413: woke up from S4, go to S5 */
3060 break;
3061
3062 default:
3063 return false;
3064 }
3065
3066 if (hotkey_wakeup_reason != TP_ACPI_WAKEUP_NONE) {
3067 printk(TPACPI_INFO
3068 "woke up due to a hot-unplug "
3069 "request...\n");
3070 hotkey_wakeup_reason_notify_change();
3071 }
3072 return true;
3073 }
3074
3075 static bool hotkey_notify_usrevent(const u32 hkey,
3076 bool *send_acpi_ev,
3077 bool *ignore_acpi_ev)
3078 {
3079 /* 0x5000-0x5FFF: human interface helpers */
3080 *send_acpi_ev = true;
3081 *ignore_acpi_ev = false;
3082
3083 switch (hkey) {
3084 case 0x5010: /* Lenovo new BIOS: brightness changed */
3085 case 0x500b: /* X61t: tablet pen inserted into bay */
3086 case 0x500c: /* X61t: tablet pen removed from bay */
3087 return true;
3088
3089 case 0x5009: /* X41t-X61t: swivel up (tablet mode) */
3090 case 0x500a: /* X41t-X61t: swivel down (normal mode) */
3091 tpacpi_input_send_tabletsw();
3092 hotkey_tablet_mode_notify_change();
3093 *send_acpi_ev = false;
3094 return true;
3095
3096 case 0x5001:
3097 case 0x5002:
3098 /* LID switch events. Do not propagate */
3099 *ignore_acpi_ev = true;
3100 return true;
3101
3102 default:
3103 return false;
3104 }
3105 }
3106
3107 static bool hotkey_notify_thermal(const u32 hkey,
3108 bool *send_acpi_ev,
3109 bool *ignore_acpi_ev)
3110 {
3111 /* 0x6000-0x6FFF: thermal alarms */
3112 *send_acpi_ev = true;
3113 *ignore_acpi_ev = false;
3114
3115 switch (hkey) {
3116 case 0x6011:
3117 printk(TPACPI_CRIT
3118 "THERMAL ALARM: battery is too hot!\n");
3119 /* recommended action: warn user through gui */
3120 return true;
3121 case 0x6012:
3122 printk(TPACPI_ALERT
3123 "THERMAL EMERGENCY: battery is extremely hot!\n");
3124 /* recommended action: immediate sleep/hibernate */
3125 return true;
3126 case 0x6021:
3127 printk(TPACPI_CRIT
3128 "THERMAL ALARM: "
3129 "a sensor reports something is too hot!\n");
3130 /* recommended action: warn user through gui, that */
3131 /* some internal component is too hot */
3132 return true;
3133 case 0x6022:
3134 printk(TPACPI_ALERT
3135 "THERMAL EMERGENCY: "
3136 "a sensor reports something is extremely hot!\n");
3137 /* recommended action: immediate sleep/hibernate */
3138 return true;
3139 case 0x6030:
3140 printk(TPACPI_INFO
3141 "EC reports that Thermal Table has changed\n");
3142 /* recommended action: do nothing, we don't have
3143 * Lenovo ATM information */
3144 return true;
3145 default:
3146 printk(TPACPI_ALERT
3147 "THERMAL ALERT: unknown thermal alarm received\n");
3148 return false;
3149 }
3150 }
3151
3152 static void hotkey_notify(struct ibm_struct *ibm, u32 event)
3153 {
3154 u32 hkey;
3155 bool send_acpi_ev;
3156 bool ignore_acpi_ev;
3157 bool known_ev;
3158
3159 if (event != 0x80) {
3160 printk(TPACPI_ERR
3161 "unknown HKEY notification event %d\n", event);
3162 /* forward it to userspace, maybe it knows how to handle it */
3163 acpi_bus_generate_netlink_event(
3164 ibm->acpi->device->pnp.device_class,
3165 dev_name(&ibm->acpi->device->dev),
3166 event, 0);
3167 return;
3168 }
3169
3170 while (1) {
3171 if (!acpi_evalf(hkey_handle, &hkey, "MHKP", "d")) {
3172 printk(TPACPI_ERR "failed to retrieve HKEY event\n");
3173 return;
3174 }
3175
3176 if (hkey == 0) {
3177 /* queue empty */
3178 return;
3179 }
3180
3181 send_acpi_ev = true;
3182 ignore_acpi_ev = false;
3183
3184 switch (hkey >> 12) {
3185 case 1:
3186 /* 0x1000-0x1FFF: key presses */
3187 known_ev = hotkey_notify_hotkey(hkey, &send_acpi_ev,
3188 &ignore_acpi_ev);
3189 break;
3190 case 2:
3191 /* 0x2000-0x2FFF: Wakeup reason */
3192 known_ev = hotkey_notify_wakeup(hkey, &send_acpi_ev,
3193 &ignore_acpi_ev);
3194 break;
3195 case 3:
3196 /* 0x3000-0x3FFF: bay-related wakeups */
3197 if (hkey == 0x3003) {
3198 hotkey_autosleep_ack = 1;
3199 printk(TPACPI_INFO
3200 "bay ejected\n");
3201 hotkey_wakeup_hotunplug_complete_notify_change();
3202 known_ev = true;
3203 } else {
3204 known_ev = false;
3205 }
3206 break;
3207 case 4:
3208 /* 0x4000-0x4FFF: dock-related wakeups */
3209 if (hkey == 0x4003) {
3210 hotkey_autosleep_ack = 1;
3211 printk(TPACPI_INFO
3212 "undocked\n");
3213 hotkey_wakeup_hotunplug_complete_notify_change();
3214 known_ev = true;
3215 } else {
3216 known_ev = false;
3217 }
3218 break;
3219 case 5:
3220 /* 0x5000-0x5FFF: human interface helpers */
3221 known_ev = hotkey_notify_usrevent(hkey, &send_acpi_ev,
3222 &ignore_acpi_ev);
3223 break;
3224 case 6:
3225 /* 0x6000-0x6FFF: thermal alarms */
3226 known_ev = hotkey_notify_thermal(hkey, &send_acpi_ev,
3227 &ignore_acpi_ev);
3228 break;
3229 case 7:
3230 /* 0x7000-0x7FFF: misc */
3231 if (tp_features.hotkey_wlsw && hkey == 0x7000) {
3232 tpacpi_send_radiosw_update();
3233 send_acpi_ev = 0;
3234 known_ev = true;
3235 break;
3236 }
3237 /* fallthrough to default */
3238 default:
3239 known_ev = false;
3240 }
3241 if (!known_ev) {
3242 printk(TPACPI_NOTICE
3243 "unhandled HKEY event 0x%04x\n", hkey);
3244 printk(TPACPI_NOTICE
3245 "please report the conditions when this "
3246 "event happened to %s\n", TPACPI_MAIL);
3247 }
3248
3249 /* Legacy events */
3250 if (!ignore_acpi_ev &&
3251 (send_acpi_ev || hotkey_report_mode < 2)) {
3252 acpi_bus_generate_proc_event(ibm->acpi->device,
3253 event, hkey);
3254 }
3255
3256 /* netlink events */
3257 if (!ignore_acpi_ev && send_acpi_ev) {
3258 acpi_bus_generate_netlink_event(
3259 ibm->acpi->device->pnp.device_class,
3260 dev_name(&ibm->acpi->device->dev),
3261 event, hkey);
3262 }
3263 }
3264 }
3265
3266 static void hotkey_suspend(pm_message_t state)
3267 {
3268 /* Do these on suspend, we get the events on early resume! */
3269 hotkey_wakeup_reason = TP_ACPI_WAKEUP_NONE;
3270 hotkey_autosleep_ack = 0;
3271 }
3272
3273 static void hotkey_resume(void)
3274 {
3275 tpacpi_disable_brightness_delay();
3276
3277 if (hotkey_mask_get())
3278 printk(TPACPI_ERR
3279 "error while trying to read hot key mask "
3280 "from firmware\n");
3281 tpacpi_send_radiosw_update();
3282 hotkey_tablet_mode_notify_change();
3283 hotkey_wakeup_reason_notify_change();
3284 hotkey_wakeup_hotunplug_complete_notify_change();
3285 hotkey_poll_setup_safe(0);
3286 }
3287
3288 /* procfs -------------------------------------------------------------- */
3289 static int hotkey_read(char *p)
3290 {
3291 int res, status;
3292 int len = 0;
3293
3294 if (!tp_features.hotkey) {
3295 len += sprintf(p + len, "status:\t\tnot supported\n");
3296 return len;
3297 }
3298
3299 if (mutex_lock_killable(&hotkey_mutex))
3300 return -ERESTARTSYS;
3301 res = hotkey_status_get(&status);
3302 if (!res)
3303 res = hotkey_mask_get();
3304 mutex_unlock(&hotkey_mutex);
3305 if (res)
3306 return res;
3307
3308 len += sprintf(p + len, "status:\t\t%s\n", enabled(status, 0));
3309 if (tp_features.hotkey_mask) {
3310 len += sprintf(p + len, "mask:\t\t0x%08x\n", hotkey_mask);
3311 len += sprintf(p + len,
3312 "commands:\tenable, disable, reset, <mask>\n");
3313 } else {
3314 len += sprintf(p + len, "mask:\t\tnot supported\n");
3315 len += sprintf(p + len, "commands:\tenable, disable, reset\n");
3316 }
3317
3318 return len;
3319 }
3320
3321 static void hotkey_enabledisable_warn(bool enable)
3322 {
3323 tpacpi_log_usertask("procfs hotkey enable/disable");
3324 if (!WARN((tpacpi_lifecycle == TPACPI_LIFE_RUNNING || !enable),
3325 TPACPI_WARN
3326 "hotkey enable/disable functionality has been "
3327 "removed from the driver. Hotkeys are always "
3328 "enabled\n"))
3329 printk(TPACPI_ERR
3330 "Please remove the hotkey=enable module "
3331 "parameter, it is deprecated. Hotkeys are always "
3332 "enabled\n");
3333 }
3334
3335 static int hotkey_write(char *buf)
3336 {
3337 int res;
3338 u32 mask;
3339 char *cmd;
3340
3341 if (!tp_features.hotkey)
3342 return -ENODEV;
3343
3344 if (mutex_lock_killable(&hotkey_mutex))
3345 return -ERESTARTSYS;
3346
3347 mask = hotkey_mask;
3348
3349 res = 0;
3350 while ((cmd = next_cmd(&buf))) {
3351 if (strlencmp(cmd, "enable") == 0) {
3352 hotkey_enabledisable_warn(1);
3353 } else if (strlencmp(cmd, "disable") == 0) {
3354 hotkey_enabledisable_warn(0);
3355 res = -EPERM;
3356 } else if (strlencmp(cmd, "reset") == 0) {
3357 mask = hotkey_orig_mask;
3358 } else if (sscanf(cmd, "0x%x", &mask) == 1) {
3359 /* mask set */
3360 } else if (sscanf(cmd, "%x", &mask) == 1) {
3361 /* mask set */
3362 } else {
3363 res = -EINVAL;
3364 goto errexit;
3365 }
3366 }
3367
3368 if (!res)
3369 tpacpi_disclose_usertask("procfs hotkey",
3370 "set mask to 0x%08x\n", mask);
3371
3372 if (!res && mask != hotkey_mask)
3373 res = hotkey_mask_set(mask);
3374
3375 errexit:
3376 mutex_unlock(&hotkey_mutex);
3377 return res;
3378 }
3379
3380 static const struct acpi_device_id ibm_htk_device_ids[] = {
3381 {TPACPI_ACPI_HKEY_HID, 0},
3382 {"", 0},
3383 };
3384
3385 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver = {
3386 .hid = ibm_htk_device_ids,
3387 .notify = hotkey_notify,
3388 .handle = &hkey_handle,
3389 .type = ACPI_DEVICE_NOTIFY,
3390 };
3391
3392 static struct ibm_struct hotkey_driver_data = {
3393 .name = "hotkey",
3394 .read = hotkey_read,
3395 .write = hotkey_write,
3396 .exit = hotkey_exit,
3397 .resume = hotkey_resume,
3398 .suspend = hotkey_suspend,
3399 .acpi = &ibm_hotkey_acpidriver,
3400 };
3401
3402 /*************************************************************************
3403 * Bluetooth subdriver
3404 */
3405
3406 enum {
3407 /* ACPI GBDC/SBDC bits */
3408 TP_ACPI_BLUETOOTH_HWPRESENT = 0x01, /* Bluetooth hw available */
3409 TP_ACPI_BLUETOOTH_RADIOSSW = 0x02, /* Bluetooth radio enabled */
3410 TP_ACPI_BLUETOOTH_RESUMECTRL = 0x04, /* Bluetooth state at resume:
3411 off / last state */
3412 };
3413
3414 enum {
3415 /* ACPI \BLTH commands */
3416 TP_ACPI_BLTH_GET_ULTRAPORT_ID = 0x00, /* Get Ultraport BT ID */
3417 TP_ACPI_BLTH_GET_PWR_ON_RESUME = 0x01, /* Get power-on-resume state */
3418 TP_ACPI_BLTH_PWR_ON_ON_RESUME = 0x02, /* Resume powered on */
3419 TP_ACPI_BLTH_PWR_OFF_ON_RESUME = 0x03, /* Resume powered off */
3420 TP_ACPI_BLTH_SAVE_STATE = 0x05, /* Save state for S4/S5 */
3421 };
3422
3423 #define TPACPI_RFK_BLUETOOTH_SW_NAME "tpacpi_bluetooth_sw"
3424
3425 static void bluetooth_suspend(pm_message_t state)
3426 {
3427 /* Try to make sure radio will resume powered off */
3428 if (!acpi_evalf(NULL, NULL, "\\BLTH", "vd",
3429 TP_ACPI_BLTH_PWR_OFF_ON_RESUME))
3430 vdbg_printk(TPACPI_DBG_RFKILL,
3431 "bluetooth power down on resume request failed\n");
3432 }
3433
3434 static int bluetooth_get_status(void)
3435 {
3436 int status;
3437
3438 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3439 if (dbg_bluetoothemul)
3440 return (tpacpi_bluetooth_emulstate) ?
3441 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
3442 #endif
3443
3444 if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
3445 return -EIO;
3446
3447 return ((status & TP_ACPI_BLUETOOTH_RADIOSSW) != 0) ?
3448 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
3449 }
3450
3451 static int bluetooth_set_status(enum tpacpi_rfkill_state state)
3452 {
3453 int status;
3454
3455 vdbg_printk(TPACPI_DBG_RFKILL,
3456 "will attempt to %s bluetooth\n",
3457 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable");
3458
3459 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3460 if (dbg_bluetoothemul) {
3461 tpacpi_bluetooth_emulstate = (state == TPACPI_RFK_RADIO_ON);
3462 return 0;
3463 }
3464 #endif
3465
3466 /* We make sure to keep TP_ACPI_BLUETOOTH_RESUMECTRL off */
3467 if (state == TPACPI_RFK_RADIO_ON)
3468 status = TP_ACPI_BLUETOOTH_RADIOSSW;
3469 else
3470 status = 0;
3471
3472 if (!acpi_evalf(hkey_handle, NULL, "SBDC", "vd", status))
3473 return -EIO;
3474
3475 return 0;
3476 }
3477
3478 /* sysfs bluetooth enable ---------------------------------------------- */
3479 static ssize_t bluetooth_enable_show(struct device *dev,
3480 struct device_attribute *attr,
3481 char *buf)
3482 {
3483 return tpacpi_rfk_sysfs_enable_show(TPACPI_RFK_BLUETOOTH_SW_ID,
3484 attr, buf);
3485 }
3486
3487 static ssize_t bluetooth_enable_store(struct device *dev,
3488 struct device_attribute *attr,
3489 const char *buf, size_t count)
3490 {
3491 return tpacpi_rfk_sysfs_enable_store(TPACPI_RFK_BLUETOOTH_SW_ID,
3492 attr, buf, count);
3493 }
3494
3495 static struct device_attribute dev_attr_bluetooth_enable =
3496 __ATTR(bluetooth_enable, S_IWUSR | S_IRUGO,
3497 bluetooth_enable_show, bluetooth_enable_store);
3498
3499 /* --------------------------------------------------------------------- */
3500
3501 static struct attribute *bluetooth_attributes[] = {
3502 &dev_attr_bluetooth_enable.attr,
3503 NULL
3504 };
3505
3506 static const struct attribute_group bluetooth_attr_group = {
3507 .attrs = bluetooth_attributes,
3508 };
3509
3510 static const struct tpacpi_rfk_ops bluetooth_tprfk_ops = {
3511 .get_status = bluetooth_get_status,
3512 .set_status = bluetooth_set_status,
3513 };
3514
3515 static void bluetooth_shutdown(void)
3516 {
3517 /* Order firmware to save current state to NVRAM */
3518 if (!acpi_evalf(NULL, NULL, "\\BLTH", "vd",
3519 TP_ACPI_BLTH_SAVE_STATE))
3520 printk(TPACPI_NOTICE
3521 "failed to save bluetooth state to NVRAM\n");
3522 else
3523 vdbg_printk(TPACPI_DBG_RFKILL,
3524 "bluestooth state saved to NVRAM\n");
3525 }
3526
3527 static void bluetooth_exit(void)
3528 {
3529 sysfs_remove_group(&tpacpi_pdev->dev.kobj,
3530 &bluetooth_attr_group);
3531
3532 tpacpi_destroy_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID);
3533
3534 bluetooth_shutdown();
3535 }
3536
3537 static int __init bluetooth_init(struct ibm_init_struct *iibm)
3538 {
3539 int res;
3540 int status = 0;
3541
3542 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
3543 "initializing bluetooth subdriver\n");
3544
3545 TPACPI_ACPIHANDLE_INIT(hkey);
3546
3547 /* bluetooth not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
3548 G4x, R30, R31, R40e, R50e, T20-22, X20-21 */
3549 tp_features.bluetooth = hkey_handle &&
3550 acpi_evalf(hkey_handle, &status, "GBDC", "qd");
3551
3552 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
3553 "bluetooth is %s, status 0x%02x\n",
3554 str_supported(tp_features.bluetooth),
3555 status);
3556
3557 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3558 if (dbg_bluetoothemul) {
3559 tp_features.bluetooth = 1;
3560 printk(TPACPI_INFO
3561 "bluetooth switch emulation enabled\n");
3562 } else
3563 #endif
3564 if (tp_features.bluetooth &&
3565 !(status & TP_ACPI_BLUETOOTH_HWPRESENT)) {
3566 /* no bluetooth hardware present in system */
3567 tp_features.bluetooth = 0;
3568 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
3569 "bluetooth hardware not installed\n");
3570 }
3571
3572 if (!tp_features.bluetooth)
3573 return 1;
3574
3575 res = tpacpi_new_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID,
3576 &bluetooth_tprfk_ops,
3577 RFKILL_TYPE_BLUETOOTH,
3578 TPACPI_RFK_BLUETOOTH_SW_NAME,
3579 true);
3580 if (res)
3581 return res;
3582
3583 res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
3584 &bluetooth_attr_group);
3585 if (res) {
3586 tpacpi_destroy_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID);
3587 return res;
3588 }
3589
3590 return 0;
3591 }
3592
3593 /* procfs -------------------------------------------------------------- */
3594 static int bluetooth_read(char *p)
3595 {
3596 return tpacpi_rfk_procfs_read(TPACPI_RFK_BLUETOOTH_SW_ID, p);
3597 }
3598
3599 static int bluetooth_write(char *buf)
3600 {
3601 return tpacpi_rfk_procfs_write(TPACPI_RFK_BLUETOOTH_SW_ID, buf);
3602 }
3603
3604 static struct ibm_struct bluetooth_driver_data = {
3605 .name = "bluetooth",
3606 .read = bluetooth_read,
3607 .write = bluetooth_write,
3608 .exit = bluetooth_exit,
3609 .suspend = bluetooth_suspend,
3610 .shutdown = bluetooth_shutdown,
3611 };
3612
3613 /*************************************************************************
3614 * Wan subdriver
3615 */
3616
3617 enum {
3618 /* ACPI GWAN/SWAN bits */
3619 TP_ACPI_WANCARD_HWPRESENT = 0x01, /* Wan hw available */
3620 TP_ACPI_WANCARD_RADIOSSW = 0x02, /* Wan radio enabled */
3621 TP_ACPI_WANCARD_RESUMECTRL = 0x04, /* Wan state at resume:
3622 off / last state */
3623 };
3624
3625 #define TPACPI_RFK_WWAN_SW_NAME "tpacpi_wwan_sw"
3626
3627 static void wan_suspend(pm_message_t state)
3628 {
3629 /* Try to make sure radio will resume powered off */
3630 if (!acpi_evalf(NULL, NULL, "\\WGSV", "qvd",
3631 TP_ACPI_WGSV_PWR_OFF_ON_RESUME))
3632 vdbg_printk(TPACPI_DBG_RFKILL,
3633 "WWAN power down on resume request failed\n");
3634 }
3635
3636 static int wan_get_status(void)
3637 {
3638 int status;
3639
3640 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3641 if (dbg_wwanemul)
3642 return (tpacpi_wwan_emulstate) ?
3643 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
3644 #endif
3645
3646 if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
3647 return -EIO;
3648
3649 return ((status & TP_ACPI_WANCARD_RADIOSSW) != 0) ?
3650 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
3651 }
3652
3653 static int wan_set_status(enum tpacpi_rfkill_state state)
3654 {
3655 int status;
3656
3657 vdbg_printk(TPACPI_DBG_RFKILL,
3658 "will attempt to %s wwan\n",
3659 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable");
3660
3661 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3662 if (dbg_wwanemul) {
3663 tpacpi_wwan_emulstate = (state == TPACPI_RFK_RADIO_ON);
3664 return 0;
3665 }
3666 #endif
3667
3668 /* We make sure to keep TP_ACPI_WANCARD_RESUMECTRL off */
3669 if (state == TPACPI_RFK_RADIO_ON)
3670 status = TP_ACPI_WANCARD_RADIOSSW;
3671 else
3672 status = 0;
3673
3674 if (!acpi_evalf(hkey_handle, NULL, "SWAN", "vd", status))
3675 return -EIO;
3676
3677 return 0;
3678 }
3679
3680 /* sysfs wan enable ---------------------------------------------------- */
3681 static ssize_t wan_enable_show(struct device *dev,
3682 struct device_attribute *attr,
3683 char *buf)
3684 {
3685 return tpacpi_rfk_sysfs_enable_show(TPACPI_RFK_WWAN_SW_ID,
3686 attr, buf);
3687 }
3688
3689 static ssize_t wan_enable_store(struct device *dev,
3690 struct device_attribute *attr,
3691 const char *buf, size_t count)
3692 {
3693 return tpacpi_rfk_sysfs_enable_store(TPACPI_RFK_WWAN_SW_ID,
3694 attr, buf, count);
3695 }
3696
3697 static struct device_attribute dev_attr_wan_enable =
3698 __ATTR(wwan_enable, S_IWUSR | S_IRUGO,
3699 wan_enable_show, wan_enable_store);
3700
3701 /* --------------------------------------------------------------------- */
3702
3703 static struct attribute *wan_attributes[] = {
3704 &dev_attr_wan_enable.attr,
3705 NULL
3706 };
3707
3708 static const struct attribute_group wan_attr_group = {
3709 .attrs = wan_attributes,
3710 };
3711
3712 static const struct tpacpi_rfk_ops wan_tprfk_ops = {
3713 .get_status = wan_get_status,
3714 .set_status = wan_set_status,
3715 };
3716
3717 static void wan_shutdown(void)
3718 {
3719 /* Order firmware to save current state to NVRAM */
3720 if (!acpi_evalf(NULL, NULL, "\\WGSV", "vd",
3721 TP_ACPI_WGSV_SAVE_STATE))
3722 printk(TPACPI_NOTICE
3723 "failed to save WWAN state to NVRAM\n");
3724 else
3725 vdbg_printk(TPACPI_DBG_RFKILL,
3726 "WWAN state saved to NVRAM\n");
3727 }
3728
3729 static void wan_exit(void)
3730 {
3731 sysfs_remove_group(&tpacpi_pdev->dev.kobj,
3732 &wan_attr_group);
3733
3734 tpacpi_destroy_rfkill(TPACPI_RFK_WWAN_SW_ID);
3735
3736 wan_shutdown();
3737 }
3738
3739 static int __init wan_init(struct ibm_init_struct *iibm)
3740 {
3741 int res;
3742 int status = 0;
3743
3744 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
3745 "initializing wan subdriver\n");
3746
3747 TPACPI_ACPIHANDLE_INIT(hkey);
3748
3749 tp_features.wan = hkey_handle &&
3750 acpi_evalf(hkey_handle, &status, "GWAN", "qd");
3751
3752 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
3753 "wan is %s, status 0x%02x\n",
3754 str_supported(tp_features.wan),
3755 status);
3756
3757 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3758 if (dbg_wwanemul) {
3759 tp_features.wan = 1;
3760 printk(TPACPI_INFO
3761 "wwan switch emulation enabled\n");
3762 } else
3763 #endif
3764 if (tp_features.wan &&
3765 !(status & TP_ACPI_WANCARD_HWPRESENT)) {
3766 /* no wan hardware present in system */
3767 tp_features.wan = 0;
3768 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
3769 "wan hardware not installed\n");
3770 }
3771
3772 if (!tp_features.wan)
3773 return 1;
3774
3775 res = tpacpi_new_rfkill(TPACPI_RFK_WWAN_SW_ID,
3776 &wan_tprfk_ops,
3777 RFKILL_TYPE_WWAN,
3778 TPACPI_RFK_WWAN_SW_NAME,
3779 true);
3780 if (res)
3781 return res;
3782
3783 res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
3784 &wan_attr_group);
3785
3786 if (res) {
3787 tpacpi_destroy_rfkill(TPACPI_RFK_WWAN_SW_ID);
3788 return res;
3789 }
3790
3791 return 0;
3792 }
3793
3794 /* procfs -------------------------------------------------------------- */
3795 static int wan_read(char *p)
3796 {
3797 return tpacpi_rfk_procfs_read(TPACPI_RFK_WWAN_SW_ID, p);
3798 }
3799
3800 static int wan_write(char *buf)
3801 {
3802 return tpacpi_rfk_procfs_write(TPACPI_RFK_WWAN_SW_ID, buf);
3803 }
3804
3805 static struct ibm_struct wan_driver_data = {
3806 .name = "wan",
3807 .read = wan_read,
3808 .write = wan_write,
3809 .exit = wan_exit,
3810 .suspend = wan_suspend,
3811 .shutdown = wan_shutdown,
3812 };
3813
3814 /*************************************************************************
3815 * UWB subdriver
3816 */
3817
3818 enum {
3819 /* ACPI GUWB/SUWB bits */
3820 TP_ACPI_UWB_HWPRESENT = 0x01, /* UWB hw available */
3821 TP_ACPI_UWB_RADIOSSW = 0x02, /* UWB radio enabled */
3822 };
3823
3824 #define TPACPI_RFK_UWB_SW_NAME "tpacpi_uwb_sw"
3825
3826 static int uwb_get_status(void)
3827 {
3828 int status;
3829
3830 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3831 if (dbg_uwbemul)
3832 return (tpacpi_uwb_emulstate) ?
3833 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
3834 #endif
3835
3836 if (!acpi_evalf(hkey_handle, &status, "GUWB", "d"))
3837 return -EIO;
3838
3839 return ((status & TP_ACPI_UWB_RADIOSSW) != 0) ?
3840 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
3841 }
3842
3843 static int uwb_set_status(enum tpacpi_rfkill_state state)
3844 {
3845 int status;
3846
3847 vdbg_printk(TPACPI_DBG_RFKILL,
3848 "will attempt to %s UWB\n",
3849 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable");
3850
3851 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3852 if (dbg_uwbemul) {
3853 tpacpi_uwb_emulstate = (state == TPACPI_RFK_RADIO_ON);
3854 return 0;
3855 }
3856 #endif
3857
3858 if (state == TPACPI_RFK_RADIO_ON)
3859 status = TP_ACPI_UWB_RADIOSSW;
3860 else
3861 status = 0;
3862
3863 if (!acpi_evalf(hkey_handle, NULL, "SUWB", "vd", status))
3864 return -EIO;
3865
3866 return 0;
3867 }
3868
3869 /* --------------------------------------------------------------------- */
3870
3871 static const struct tpacpi_rfk_ops uwb_tprfk_ops = {
3872 .get_status = uwb_get_status,
3873 .set_status = uwb_set_status,
3874 };
3875
3876 static void uwb_exit(void)
3877 {
3878 tpacpi_destroy_rfkill(TPACPI_RFK_UWB_SW_ID);
3879 }
3880
3881 static int __init uwb_init(struct ibm_init_struct *iibm)
3882 {
3883 int res;
3884 int status = 0;
3885
3886 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
3887 "initializing uwb subdriver\n");
3888
3889 TPACPI_ACPIHANDLE_INIT(hkey);
3890
3891 tp_features.uwb = hkey_handle &&
3892 acpi_evalf(hkey_handle, &status, "GUWB", "qd");
3893
3894 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
3895 "uwb is %s, status 0x%02x\n",
3896 str_supported(tp_features.uwb),
3897 status);
3898
3899 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3900 if (dbg_uwbemul) {
3901 tp_features.uwb = 1;
3902 printk(TPACPI_INFO
3903 "uwb switch emulation enabled\n");
3904 } else
3905 #endif
3906 if (tp_features.uwb &&
3907 !(status & TP_ACPI_UWB_HWPRESENT)) {
3908 /* no uwb hardware present in system */
3909 tp_features.uwb = 0;
3910 dbg_printk(TPACPI_DBG_INIT,
3911 "uwb hardware not installed\n");
3912 }
3913
3914 if (!tp_features.uwb)
3915 return 1;
3916
3917 res = tpacpi_new_rfkill(TPACPI_RFK_UWB_SW_ID,
3918 &uwb_tprfk_ops,
3919 RFKILL_TYPE_UWB,
3920 TPACPI_RFK_UWB_SW_NAME,
3921 false);
3922 return res;
3923 }
3924
3925 static struct ibm_struct uwb_driver_data = {
3926 .name = "uwb",
3927 .exit = uwb_exit,
3928 .flags.experimental = 1,
3929 };
3930
3931 /*************************************************************************
3932 * Video subdriver
3933 */
3934
3935 #ifdef CONFIG_THINKPAD_ACPI_VIDEO
3936
3937 enum video_access_mode {
3938 TPACPI_VIDEO_NONE = 0,
3939 TPACPI_VIDEO_570, /* 570 */
3940 TPACPI_VIDEO_770, /* 600e/x, 770e, 770x */
3941 TPACPI_VIDEO_NEW, /* all others */
3942 };
3943
3944 enum { /* video status flags, based on VIDEO_570 */
3945 TP_ACPI_VIDEO_S_LCD = 0x01, /* LCD output enabled */
3946 TP_ACPI_VIDEO_S_CRT = 0x02, /* CRT output enabled */
3947 TP_ACPI_VIDEO_S_DVI = 0x08, /* DVI output enabled */
3948 };
3949
3950 enum { /* TPACPI_VIDEO_570 constants */
3951 TP_ACPI_VIDEO_570_PHSCMD = 0x87, /* unknown magic constant :( */
3952 TP_ACPI_VIDEO_570_PHSMASK = 0x03, /* PHS bits that map to
3953 * video_status_flags */
3954 TP_ACPI_VIDEO_570_PHS2CMD = 0x8b, /* unknown magic constant :( */
3955 TP_ACPI_VIDEO_570_PHS2SET = 0x80, /* unknown magic constant :( */
3956 };
3957
3958 static enum video_access_mode video_supported;
3959 static int video_orig_autosw;
3960
3961 static int video_autosw_get(void);
3962 static int video_autosw_set(int enable);
3963
3964 TPACPI_HANDLE(vid2, root, "\\_SB.PCI0.AGPB.VID"); /* G41 */
3965
3966 static int __init video_init(struct ibm_init_struct *iibm)
3967 {
3968 int ivga;
3969
3970 vdbg_printk(TPACPI_DBG_INIT, "initializing video subdriver\n");
3971
3972 TPACPI_ACPIHANDLE_INIT(vid);
3973 TPACPI_ACPIHANDLE_INIT(vid2);
3974
3975 if (vid2_handle && acpi_evalf(NULL, &ivga, "\\IVGA", "d") && ivga)
3976 /* G41, assume IVGA doesn't change */
3977 vid_handle = vid2_handle;
3978
3979 if (!vid_handle)
3980 /* video switching not supported on R30, R31 */
3981 video_supported = TPACPI_VIDEO_NONE;
3982 else if (acpi_evalf(vid_handle, &video_orig_autosw, "SWIT", "qd"))
3983 /* 570 */
3984 video_supported = TPACPI_VIDEO_570;
3985 else if (acpi_evalf(vid_handle, &video_orig_autosw, "^VADL", "qd"))
3986 /* 600e/x, 770e, 770x */
3987 video_supported = TPACPI_VIDEO_770;
3988 else
3989 /* all others */
3990 video_supported = TPACPI_VIDEO_NEW;
3991
3992 vdbg_printk(TPACPI_DBG_INIT, "video is %s, mode %d\n",
3993 str_supported(video_supported != TPACPI_VIDEO_NONE),
3994 video_supported);
3995
3996 return (video_supported != TPACPI_VIDEO_NONE)? 0 : 1;
3997 }
3998
3999 static void video_exit(void)
4000 {
4001 dbg_printk(TPACPI_DBG_EXIT,
4002 "restoring original video autoswitch mode\n");
4003 if (video_autosw_set(video_orig_autosw))
4004 printk(TPACPI_ERR "error while trying to restore original "
4005 "video autoswitch mode\n");
4006 }
4007
4008 static int video_outputsw_get(void)
4009 {
4010 int status = 0;
4011 int i;
4012
4013 switch (video_supported) {
4014 case TPACPI_VIDEO_570:
4015 if (!acpi_evalf(NULL, &i, "\\_SB.PHS", "dd",
4016 TP_ACPI_VIDEO_570_PHSCMD))
4017 return -EIO;
4018 status = i & TP_ACPI_VIDEO_570_PHSMASK;
4019 break;
4020 case TPACPI_VIDEO_770:
4021 if (!acpi_evalf(NULL, &i, "\\VCDL", "d"))
4022 return -EIO;
4023 if (i)
4024 status |= TP_ACPI_VIDEO_S_LCD;
4025 if (!acpi_evalf(NULL, &i, "\\VCDC", "d"))
4026 return -EIO;
4027 if (i)
4028 status |= TP_ACPI_VIDEO_S_CRT;
4029 break;
4030 case TPACPI_VIDEO_NEW:
4031 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 1) ||
4032 !acpi_evalf(NULL, &i, "\\VCDC", "d"))
4033 return -EIO;
4034 if (i)
4035 status |= TP_ACPI_VIDEO_S_CRT;
4036
4037 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0) ||
4038 !acpi_evalf(NULL, &i, "\\VCDL", "d"))
4039 return -EIO;
4040 if (i)
4041 status |= TP_ACPI_VIDEO_S_LCD;
4042 if (!acpi_evalf(NULL, &i, "\\VCDD", "d"))
4043 return -EIO;
4044 if (i)
4045 status |= TP_ACPI_VIDEO_S_DVI;
4046 break;
4047 default:
4048 return -ENOSYS;
4049 }
4050
4051 return status;
4052 }
4053
4054 static int video_outputsw_set(int status)
4055 {
4056 int autosw;
4057 int res = 0;
4058
4059 switch (video_supported) {
4060 case TPACPI_VIDEO_570:
4061 res = acpi_evalf(NULL, NULL,
4062 "\\_SB.PHS2", "vdd",
4063 TP_ACPI_VIDEO_570_PHS2CMD,
4064 status | TP_ACPI_VIDEO_570_PHS2SET);
4065 break;
4066 case TPACPI_VIDEO_770:
4067 autosw = video_autosw_get();
4068 if (autosw < 0)
4069 return autosw;
4070
4071 res = video_autosw_set(1);
4072 if (res)
4073 return res;
4074 res = acpi_evalf(vid_handle, NULL,
4075 "ASWT", "vdd", status * 0x100, 0);
4076 if (!autosw && video_autosw_set(autosw)) {
4077 printk(TPACPI_ERR
4078 "video auto-switch left enabled due to error\n");
4079 return -EIO;
4080 }
4081 break;
4082 case TPACPI_VIDEO_NEW:
4083 res = acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0x80) &&
4084 acpi_evalf(NULL, NULL, "\\VSDS", "vdd", status, 1);
4085 break;
4086 default:
4087 return -ENOSYS;
4088 }
4089
4090 return (res)? 0 : -EIO;
4091 }
4092
4093 static int video_autosw_get(void)
4094 {
4095 int autosw = 0;
4096
4097 switch (video_supported) {
4098 case TPACPI_VIDEO_570:
4099 if (!acpi_evalf(vid_handle, &autosw, "SWIT", "d"))
4100 return -EIO;
4101 break;
4102 case TPACPI_VIDEO_770:
4103 case TPACPI_VIDEO_NEW:
4104 if (!acpi_evalf(vid_handle, &autosw, "^VDEE", "d"))
4105 return -EIO;
4106 break;
4107 default:
4108 return -ENOSYS;
4109 }
4110
4111 return autosw & 1;
4112 }
4113
4114 static int video_autosw_set(int enable)
4115 {
4116 if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", (enable)? 1 : 0))
4117 return -EIO;
4118 return 0;
4119 }
4120
4121 static int video_outputsw_cycle(void)
4122 {
4123 int autosw = video_autosw_get();
4124 int res;
4125
4126 if (autosw < 0)
4127 return autosw;
4128
4129 switch (video_supported) {
4130 case TPACPI_VIDEO_570:
4131 res = video_autosw_set(1);
4132 if (res)
4133 return res;
4134 res = acpi_evalf(ec_handle, NULL, "_Q16", "v");
4135 break;
4136 case TPACPI_VIDEO_770:
4137 case TPACPI_VIDEO_NEW:
4138 res = video_autosw_set(1);
4139 if (res)
4140 return res;
4141 res = acpi_evalf(vid_handle, NULL, "VSWT", "v");
4142 break;
4143 default:
4144 return -ENOSYS;
4145 }
4146 if (!autosw && video_autosw_set(autosw)) {
4147 printk(TPACPI_ERR
4148 "video auto-switch left enabled due to error\n");
4149 return -EIO;
4150 }
4151
4152 return (res)? 0 : -EIO;
4153 }
4154
4155 static int video_expand_toggle(void)
4156 {
4157 switch (video_supported) {
4158 case TPACPI_VIDEO_570:
4159 return acpi_evalf(ec_handle, NULL, "_Q17", "v")?
4160 0 : -EIO;
4161 case TPACPI_VIDEO_770:
4162 return acpi_evalf(vid_handle, NULL, "VEXP", "v")?
4163 0 : -EIO;
4164 case TPACPI_VIDEO_NEW:
4165 return acpi_evalf(NULL, NULL, "\\VEXP", "v")?
4166 0 : -EIO;
4167 default:
4168 return -ENOSYS;
4169 }
4170 /* not reached */
4171 }
4172
4173 static int video_read(char *p)
4174 {
4175 int status, autosw;
4176 int len = 0;
4177
4178 if (video_supported == TPACPI_VIDEO_NONE) {
4179 len += sprintf(p + len, "status:\t\tnot supported\n");
4180 return len;
4181 }
4182
4183 status = video_outputsw_get();
4184 if (status < 0)
4185 return status;
4186
4187 autosw = video_autosw_get();
4188 if (autosw < 0)
4189 return autosw;
4190
4191 len += sprintf(p + len, "status:\t\tsupported\n");
4192 len += sprintf(p + len, "lcd:\t\t%s\n", enabled(status, 0));
4193 len += sprintf(p + len, "crt:\t\t%s\n", enabled(status, 1));
4194 if (video_supported == TPACPI_VIDEO_NEW)
4195 len += sprintf(p + len, "dvi:\t\t%s\n", enabled(status, 3));
4196 len += sprintf(p + len, "auto:\t\t%s\n", enabled(autosw, 0));
4197 len += sprintf(p + len, "commands:\tlcd_enable, lcd_disable\n");
4198 len += sprintf(p + len, "commands:\tcrt_enable, crt_disable\n");
4199 if (video_supported == TPACPI_VIDEO_NEW)
4200 len += sprintf(p + len, "commands:\tdvi_enable, dvi_disable\n");
4201 len += sprintf(p + len, "commands:\tauto_enable, auto_disable\n");
4202 len += sprintf(p + len, "commands:\tvideo_switch, expand_toggle\n");
4203
4204 return len;
4205 }
4206
4207 static int video_write(char *buf)
4208 {
4209 char *cmd;
4210 int enable, disable, status;
4211 int res;
4212
4213 if (video_supported == TPACPI_VIDEO_NONE)
4214 return -ENODEV;
4215
4216 enable = 0;
4217 disable = 0;
4218
4219 while ((cmd = next_cmd(&buf))) {
4220 if (strlencmp(cmd, "lcd_enable") == 0) {
4221 enable |= TP_ACPI_VIDEO_S_LCD;
4222 } else if (strlencmp(cmd, "lcd_disable") == 0) {
4223 disable |= TP_ACPI_VIDEO_S_LCD;
4224 } else if (strlencmp(cmd, "crt_enable") == 0) {
4225 enable |= TP_ACPI_VIDEO_S_CRT;
4226 } else if (strlencmp(cmd, "crt_disable") == 0) {
4227 disable |= TP_ACPI_VIDEO_S_CRT;
4228 } else if (video_supported == TPACPI_VIDEO_NEW &&
4229 strlencmp(cmd, "dvi_enable") == 0) {
4230 enable |= TP_ACPI_VIDEO_S_DVI;
4231 } else if (video_supported == TPACPI_VIDEO_NEW &&
4232 strlencmp(cmd, "dvi_disable") == 0) {
4233 disable |= TP_ACPI_VIDEO_S_DVI;
4234 } else if (strlencmp(cmd, "auto_enable") == 0) {
4235 res = video_autosw_set(1);
4236 if (res)
4237 return res;
4238 } else if (strlencmp(cmd, "auto_disable") == 0) {
4239 res = video_autosw_set(0);
4240 if (res)
4241 return res;
4242 } else if (strlencmp(cmd, "video_switch") == 0) {
4243 res = video_outputsw_cycle();
4244 if (res)
4245 return res;
4246 } else if (strlencmp(cmd, "expand_toggle") == 0) {
4247 res = video_expand_toggle();
4248 if (res)
4249 return res;
4250 } else
4251 return -EINVAL;
4252 }
4253
4254 if (enable || disable) {
4255 status = video_outputsw_get();
4256 if (status < 0)
4257 return status;
4258 res = video_outputsw_set((status & ~disable) | enable);
4259 if (res)
4260 return res;
4261 }
4262
4263 return 0;
4264 }
4265
4266 static struct ibm_struct video_driver_data = {
4267 .name = "video",
4268 .read = video_read,
4269 .write = video_write,
4270 .exit = video_exit,
4271 };
4272
4273 #endif /* CONFIG_THINKPAD_ACPI_VIDEO */
4274
4275 /*************************************************************************
4276 * Light (thinklight) subdriver
4277 */
4278
4279 TPACPI_HANDLE(lght, root, "\\LGHT"); /* A21e, A2xm/p, T20-22, X20-21 */
4280 TPACPI_HANDLE(ledb, ec, "LEDB"); /* G4x */
4281
4282 static int light_get_status(void)
4283 {
4284 int status = 0;
4285
4286 if (tp_features.light_status) {
4287 if (!acpi_evalf(ec_handle, &status, "KBLT", "d"))
4288 return -EIO;
4289 return (!!status);
4290 }
4291
4292 return -ENXIO;
4293 }
4294
4295 static int light_set_status(int status)
4296 {
4297 int rc;
4298
4299 if (tp_features.light) {
4300 if (cmos_handle) {
4301 rc = acpi_evalf(cmos_handle, NULL, NULL, "vd",
4302 (status)?
4303 TP_CMOS_THINKLIGHT_ON :
4304 TP_CMOS_THINKLIGHT_OFF);
4305 } else {
4306 rc = acpi_evalf(lght_handle, NULL, NULL, "vd",
4307 (status)? 1 : 0);
4308 }
4309 return (rc)? 0 : -EIO;
4310 }
4311
4312 return -ENXIO;
4313 }
4314
4315 static void light_set_status_worker(struct work_struct *work)
4316 {
4317 struct tpacpi_led_classdev *data =
4318 container_of(work, struct tpacpi_led_classdev, work);
4319
4320 if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING))
4321 light_set_status((data->new_state != TPACPI_LED_OFF));
4322 }
4323
4324 static void light_sysfs_set(struct led_classdev *led_cdev,
4325 enum led_brightness brightness)
4326 {
4327 struct tpacpi_led_classdev *data =
4328 container_of(led_cdev,
4329 struct tpacpi_led_classdev,
4330 led_classdev);
4331 data->new_state = (brightness != LED_OFF) ?
4332 TPACPI_LED_ON : TPACPI_LED_OFF;
4333 queue_work(tpacpi_wq, &data->work);
4334 }
4335
4336 static enum led_brightness light_sysfs_get(struct led_classdev *led_cdev)
4337 {
4338 return (light_get_status() == 1)? LED_FULL : LED_OFF;
4339 }
4340
4341 static struct tpacpi_led_classdev tpacpi_led_thinklight = {
4342 .led_classdev = {
4343 .name = "tpacpi::thinklight",
4344 .brightness_set = &light_sysfs_set,
4345 .brightness_get = &light_sysfs_get,
4346 }
4347 };
4348
4349 static int __init light_init(struct ibm_init_struct *iibm)
4350 {
4351 int rc;
4352
4353 vdbg_printk(TPACPI_DBG_INIT, "initializing light subdriver\n");
4354
4355 TPACPI_ACPIHANDLE_INIT(ledb);
4356 TPACPI_ACPIHANDLE_INIT(lght);
4357 TPACPI_ACPIHANDLE_INIT(cmos);
4358 INIT_WORK(&tpacpi_led_thinklight.work, light_set_status_worker);
4359
4360 /* light not supported on 570, 600e/x, 770e, 770x, G4x, R30, R31 */
4361 tp_features.light = (cmos_handle || lght_handle) && !ledb_handle;
4362
4363 if (tp_features.light)
4364 /* light status not supported on
4365 570, 600e/x, 770e, 770x, G4x, R30, R31, R32, X20 */
4366 tp_features.light_status =
4367 acpi_evalf(ec_handle, NULL, "KBLT", "qv");
4368
4369 vdbg_printk(TPACPI_DBG_INIT, "light is %s, light status is %s\n",
4370 str_supported(tp_features.light),
4371 str_supported(tp_features.light_status));
4372
4373 if (!tp_features.light)
4374 return 1;
4375
4376 rc = led_classdev_register(&tpacpi_pdev->dev,
4377 &tpacpi_led_thinklight.led_classdev);
4378
4379 if (rc < 0) {
4380 tp_features.light = 0;
4381 tp_features.light_status = 0;
4382 } else {
4383 rc = 0;
4384 }
4385
4386 return rc;
4387 }
4388
4389 static void light_exit(void)
4390 {
4391 led_classdev_unregister(&tpacpi_led_thinklight.led_classdev);
4392 if (work_pending(&tpacpi_led_thinklight.work))
4393 flush_workqueue(tpacpi_wq);
4394 }
4395
4396 static int light_read(char *p)
4397 {
4398 int len = 0;
4399 int status;
4400
4401 if (!tp_features.light) {
4402 len += sprintf(p + len, "status:\t\tnot supported\n");
4403 } else if (!tp_features.light_status) {
4404 len += sprintf(p + len, "status:\t\tunknown\n");
4405 len += sprintf(p + len, "commands:\ton, off\n");
4406 } else {
4407 status = light_get_status();
4408 if (status < 0)
4409 return status;
4410 len += sprintf(p + len, "status:\t\t%s\n", onoff(status, 0));
4411 len += sprintf(p + len, "commands:\ton, off\n");
4412 }
4413
4414 return len;
4415 }
4416
4417 static int light_write(char *buf)
4418 {
4419 char *cmd;
4420 int newstatus = 0;
4421
4422 if (!tp_features.light)
4423 return -ENODEV;
4424
4425 while ((cmd = next_cmd(&buf))) {
4426 if (strlencmp(cmd, "on") == 0) {
4427 newstatus = 1;
4428 } else if (strlencmp(cmd, "off") == 0) {
4429 newstatus = 0;
4430 } else
4431 return -EINVAL;
4432 }
4433
4434 return light_set_status(newstatus);
4435 }
4436
4437 static struct ibm_struct light_driver_data = {
4438 .name = "light",
4439 .read = light_read,
4440 .write = light_write,
4441 .exit = light_exit,
4442 };
4443
4444 /*************************************************************************
4445 * Dock subdriver
4446 */
4447
4448 #ifdef CONFIG_THINKPAD_ACPI_DOCK
4449
4450 static void dock_notify(struct ibm_struct *ibm, u32 event);
4451 static int dock_read(char *p);
4452 static int dock_write(char *buf);
4453
4454 TPACPI_HANDLE(dock, root, "\\_SB.GDCK", /* X30, X31, X40 */
4455 "\\_SB.PCI0.DOCK", /* 600e/x,770e,770x,A2xm/p,T20-22,X20-21 */
4456 "\\_SB.PCI0.PCI1.DOCK", /* all others */
4457 "\\_SB.PCI.ISA.SLCE", /* 570 */
4458 ); /* A21e,G4x,R30,R31,R32,R40,R40e,R50e */
4459
4460 /* don't list other alternatives as we install a notify handler on the 570 */
4461 TPACPI_HANDLE(pci, root, "\\_SB.PCI"); /* 570 */
4462
4463 static const struct acpi_device_id ibm_pci_device_ids[] = {
4464 {PCI_ROOT_HID_STRING, 0},
4465 {"", 0},
4466 };
4467
4468 static struct tp_acpi_drv_struct ibm_dock_acpidriver[2] = {
4469 {
4470 .notify = dock_notify,
4471 .handle = &dock_handle,
4472 .type = ACPI_SYSTEM_NOTIFY,
4473 },
4474 {
4475 /* THIS ONE MUST NEVER BE USED FOR DRIVER AUTOLOADING.
4476 * We just use it to get notifications of dock hotplug
4477 * in very old thinkpads */
4478 .hid = ibm_pci_device_ids,
4479 .notify = dock_notify,
4480 .handle = &pci_handle,
4481 .type = ACPI_SYSTEM_NOTIFY,
4482 },
4483 };
4484
4485 static struct ibm_struct dock_driver_data[2] = {
4486 {
4487 .name = "dock",
4488 .read = dock_read,
4489 .write = dock_write,
4490 .acpi = &ibm_dock_acpidriver[0],
4491 },
4492 {
4493 .name = "dock",
4494 .acpi = &ibm_dock_acpidriver[1],
4495 },
4496 };
4497
4498 #define dock_docked() (_sta(dock_handle) & 1)
4499
4500 static int __init dock_init(struct ibm_init_struct *iibm)
4501 {
4502 vdbg_printk(TPACPI_DBG_INIT, "initializing dock subdriver\n");
4503
4504 TPACPI_ACPIHANDLE_INIT(dock);
4505
4506 vdbg_printk(TPACPI_DBG_INIT, "dock is %s\n",
4507 str_supported(dock_handle != NULL));
4508
4509 return (dock_handle)? 0 : 1;
4510 }
4511
4512 static int __init dock_init2(struct ibm_init_struct *iibm)
4513 {
4514 int dock2_needed;
4515
4516 vdbg_printk(TPACPI_DBG_INIT, "initializing dock subdriver part 2\n");
4517
4518 if (dock_driver_data[0].flags.acpi_driver_registered &&
4519 dock_driver_data[0].flags.acpi_notify_installed) {
4520 TPACPI_ACPIHANDLE_INIT(pci);
4521 dock2_needed = (pci_handle != NULL);
4522 vdbg_printk(TPACPI_DBG_INIT,
4523 "dock PCI handler for the TP 570 is %s\n",
4524 str_supported(dock2_needed));
4525 } else {
4526 vdbg_printk(TPACPI_DBG_INIT,
4527 "dock subdriver part 2 not required\n");
4528 dock2_needed = 0;
4529 }
4530
4531 return (dock2_needed)? 0 : 1;
4532 }
4533
4534 static void dock_notify(struct ibm_struct *ibm, u32 event)
4535 {
4536 int docked = dock_docked();
4537 int pci = ibm->acpi->hid && ibm->acpi->device &&
4538 acpi_match_device_ids(ibm->acpi->device, ibm_pci_device_ids);
4539 int data;
4540
4541 if (event == 1 && !pci) /* 570 */
4542 data = 1; /* button */
4543 else if (event == 1 && pci) /* 570 */
4544 data = 3; /* dock */
4545 else if (event == 3 && docked)
4546 data = 1; /* button */
4547 else if (event == 3 && !docked)
4548 data = 2; /* undock */
4549 else if (event == 0 && docked)
4550 data = 3; /* dock */
4551 else {
4552 printk(TPACPI_ERR "unknown dock event %d, status %d\n",
4553 event, _sta(dock_handle));
4554 data = 0; /* unknown */
4555 }
4556 acpi_bus_generate_proc_event(ibm->acpi->device, event, data);
4557 acpi_bus_generate_netlink_event(ibm->acpi->device->pnp.device_class,
4558 dev_name(&ibm->acpi->device->dev),
4559 event, data);
4560 }
4561
4562 static int dock_read(char *p)
4563 {
4564 int len = 0;
4565 int docked = dock_docked();
4566
4567 if (!dock_handle)
4568 len += sprintf(p + len, "status:\t\tnot supported\n");
4569 else if (!docked)
4570 len += sprintf(p + len, "status:\t\tundocked\n");
4571 else {
4572 len += sprintf(p + len, "status:\t\tdocked\n");
4573 len += sprintf(p + len, "commands:\tdock, undock\n");
4574 }
4575
4576 return len;
4577 }
4578
4579 static int dock_write(char *buf)
4580 {
4581 char *cmd;
4582
4583 if (!dock_docked())
4584 return -ENODEV;
4585
4586 while ((cmd = next_cmd(&buf))) {
4587 if (strlencmp(cmd, "undock") == 0) {
4588 if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 0) ||
4589 !acpi_evalf(dock_handle, NULL, "_EJ0", "vd", 1))
4590 return -EIO;
4591 } else if (strlencmp(cmd, "dock") == 0) {
4592 if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 1))
4593 return -EIO;
4594 } else
4595 return -EINVAL;
4596 }
4597
4598 return 0;
4599 }
4600
4601 #endif /* CONFIG_THINKPAD_ACPI_DOCK */
4602
4603 /*************************************************************************
4604 * Bay subdriver
4605 */
4606
4607 #ifdef CONFIG_THINKPAD_ACPI_BAY
4608
4609 TPACPI_HANDLE(bay, root, "\\_SB.PCI.IDE.SECN.MAST", /* 570 */
4610 "\\_SB.PCI0.IDE0.IDES.IDSM", /* 600e/x, 770e, 770x */
4611 "\\_SB.PCI0.SATA.SCND.MSTR", /* T60, X60, Z60 */
4612 "\\_SB.PCI0.IDE0.SCND.MSTR", /* all others */
4613 ); /* A21e, R30, R31 */
4614 TPACPI_HANDLE(bay_ej, bay, "_EJ3", /* 600e/x, A2xm/p, A3x */
4615 "_EJ0", /* all others */
4616 ); /* 570,A21e,G4x,R30,R31,R32,R40e,R50e */
4617 TPACPI_HANDLE(bay2, root, "\\_SB.PCI0.IDE0.PRIM.SLAV", /* A3x, R32 */
4618 "\\_SB.PCI0.IDE0.IDEP.IDPS", /* 600e/x, 770e, 770x */
4619 ); /* all others */
4620 TPACPI_HANDLE(bay2_ej, bay2, "_EJ3", /* 600e/x, 770e, A3x */
4621 "_EJ0", /* 770x */
4622 ); /* all others */
4623
4624 static int __init bay_init(struct ibm_init_struct *iibm)
4625 {
4626 vdbg_printk(TPACPI_DBG_INIT, "initializing bay subdriver\n");
4627
4628 TPACPI_ACPIHANDLE_INIT(bay);
4629 if (bay_handle)
4630 TPACPI_ACPIHANDLE_INIT(bay_ej);
4631 TPACPI_ACPIHANDLE_INIT(bay2);
4632 if (bay2_handle)
4633 TPACPI_ACPIHANDLE_INIT(bay2_ej);
4634
4635 tp_features.bay_status = bay_handle &&
4636 acpi_evalf(bay_handle, NULL, "_STA", "qv");
4637 tp_features.bay_status2 = bay2_handle &&
4638 acpi_evalf(bay2_handle, NULL, "_STA", "qv");
4639
4640 tp_features.bay_eject = bay_handle && bay_ej_handle &&
4641 (strlencmp(bay_ej_path, "_EJ0") == 0 || experimental);
4642 tp_features.bay_eject2 = bay2_handle && bay2_ej_handle &&
4643 (strlencmp(bay2_ej_path, "_EJ0") == 0 || experimental);
4644
4645 vdbg_printk(TPACPI_DBG_INIT,
4646 "bay 1: status %s, eject %s; bay 2: status %s, eject %s\n",
4647 str_supported(tp_features.bay_status),
4648 str_supported(tp_features.bay_eject),
4649 str_supported(tp_features.bay_status2),
4650 str_supported(tp_features.bay_eject2));
4651
4652 return (tp_features.bay_status || tp_features.bay_eject ||
4653 tp_features.bay_status2 || tp_features.bay_eject2)? 0 : 1;
4654 }
4655
4656 static void bay_notify(struct ibm_struct *ibm, u32 event)
4657 {
4658 acpi_bus_generate_proc_event(ibm->acpi->device, event, 0);
4659 acpi_bus_generate_netlink_event(ibm->acpi->device->pnp.device_class,
4660 dev_name(&ibm->acpi->device->dev),
4661 event, 0);
4662 }
4663
4664 #define bay_occupied(b) (_sta(b##_handle) & 1)
4665
4666 static int bay_read(char *p)
4667 {
4668 int len = 0;
4669 int occupied = bay_occupied(bay);
4670 int occupied2 = bay_occupied(bay2);
4671 int eject, eject2;
4672
4673 len += sprintf(p + len, "status:\t\t%s\n",
4674 tp_features.bay_status ?
4675 (occupied ? "occupied" : "unoccupied") :
4676 "not supported");
4677 if (tp_features.bay_status2)
4678 len += sprintf(p + len, "status2:\t%s\n", occupied2 ?
4679 "occupied" : "unoccupied");
4680
4681 eject = tp_features.bay_eject && occupied;
4682 eject2 = tp_features.bay_eject2 && occupied2;
4683
4684 if (eject && eject2)
4685 len += sprintf(p + len, "commands:\teject, eject2\n");
4686 else if (eject)
4687 len += sprintf(p + len, "commands:\teject\n");
4688 else if (eject2)
4689 len += sprintf(p + len, "commands:\teject2\n");
4690
4691 return len;
4692 }
4693
4694 static int bay_write(char *buf)
4695 {
4696 char *cmd;
4697
4698 if (!tp_features.bay_eject && !tp_features.bay_eject2)
4699 return -ENODEV;
4700
4701 while ((cmd = next_cmd(&buf))) {
4702 if (tp_features.bay_eject && strlencmp(cmd, "eject") == 0) {
4703 if (!acpi_evalf(bay_ej_handle, NULL, NULL, "vd", 1))
4704 return -EIO;
4705 } else if (tp_features.bay_eject2 &&
4706 strlencmp(cmd, "eject2") == 0) {
4707 if (!acpi_evalf(bay2_ej_handle, NULL, NULL, "vd", 1))
4708 return -EIO;
4709 } else
4710 return -EINVAL;
4711 }
4712
4713 return 0;
4714 }
4715
4716 static struct tp_acpi_drv_struct ibm_bay_acpidriver = {
4717 .notify = bay_notify,
4718 .handle = &bay_handle,
4719 .type = ACPI_SYSTEM_NOTIFY,
4720 };
4721
4722 static struct ibm_struct bay_driver_data = {
4723 .name = "bay",
4724 .read = bay_read,
4725 .write = bay_write,
4726 .acpi = &ibm_bay_acpidriver,
4727 };
4728
4729 #endif /* CONFIG_THINKPAD_ACPI_BAY */
4730
4731 /*************************************************************************
4732 * CMOS subdriver
4733 */
4734
4735 /* sysfs cmos_command -------------------------------------------------- */
4736 static ssize_t cmos_command_store(struct device *dev,
4737 struct device_attribute *attr,
4738 const char *buf, size_t count)
4739 {
4740 unsigned long cmos_cmd;
4741 int res;
4742
4743 if (parse_strtoul(buf, 21, &cmos_cmd))
4744 return -EINVAL;
4745
4746 res = issue_thinkpad_cmos_command(cmos_cmd);
4747 return (res)? res : count;
4748 }
4749
4750 static struct device_attribute dev_attr_cmos_command =
4751 __ATTR(cmos_command, S_IWUSR, NULL, cmos_command_store);
4752
4753 /* --------------------------------------------------------------------- */
4754
4755 static int __init cmos_init(struct ibm_init_struct *iibm)
4756 {
4757 int res;
4758
4759 vdbg_printk(TPACPI_DBG_INIT,
4760 "initializing cmos commands subdriver\n");
4761
4762 TPACPI_ACPIHANDLE_INIT(cmos);
4763
4764 vdbg_printk(TPACPI_DBG_INIT, "cmos commands are %s\n",
4765 str_supported(cmos_handle != NULL));
4766
4767 res = device_create_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
4768 if (res)
4769 return res;
4770
4771 return (cmos_handle)? 0 : 1;
4772 }
4773
4774 static void cmos_exit(void)
4775 {
4776 device_remove_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
4777 }
4778
4779 static int cmos_read(char *p)
4780 {
4781 int len = 0;
4782
4783 /* cmos not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
4784 R30, R31, T20-22, X20-21 */
4785 if (!cmos_handle)
4786 len += sprintf(p + len, "status:\t\tnot supported\n");
4787 else {
4788 len += sprintf(p + len, "status:\t\tsupported\n");
4789 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-21)\n");
4790 }
4791
4792 return len;
4793 }
4794
4795 static int cmos_write(char *buf)
4796 {
4797 char *cmd;
4798 int cmos_cmd, res;
4799
4800 while ((cmd = next_cmd(&buf))) {
4801 if (sscanf(cmd, "%u", &cmos_cmd) == 1 &&
4802 cmos_cmd >= 0 && cmos_cmd <= 21) {
4803 /* cmos_cmd set */
4804 } else
4805 return -EINVAL;
4806
4807 res = issue_thinkpad_cmos_command(cmos_cmd);
4808 if (res)
4809 return res;
4810 }
4811
4812 return 0;
4813 }
4814
4815 static struct ibm_struct cmos_driver_data = {
4816 .name = "cmos",
4817 .read = cmos_read,
4818 .write = cmos_write,
4819 .exit = cmos_exit,
4820 };
4821
4822 /*************************************************************************
4823 * LED subdriver
4824 */
4825
4826 enum led_access_mode {
4827 TPACPI_LED_NONE = 0,
4828 TPACPI_LED_570, /* 570 */
4829 TPACPI_LED_OLD, /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
4830 TPACPI_LED_NEW, /* all others */
4831 };
4832
4833 enum { /* For TPACPI_LED_OLD */
4834 TPACPI_LED_EC_HLCL = 0x0c, /* EC reg to get led to power on */
4835 TPACPI_LED_EC_HLBL = 0x0d, /* EC reg to blink a lit led */
4836 TPACPI_LED_EC_HLMS = 0x0e, /* EC reg to select led to command */
4837 };
4838
4839 static enum led_access_mode led_supported;
4840
4841 TPACPI_HANDLE(led, ec, "SLED", /* 570 */
4842 "SYSL", /* 600e/x, 770e, 770x, A21e, A2xm/p, */
4843 /* T20-22, X20-21 */
4844 "LED", /* all others */
4845 ); /* R30, R31 */
4846
4847 #define TPACPI_LED_NUMLEDS 16
4848 static struct tpacpi_led_classdev *tpacpi_leds;
4849 static enum led_status_t tpacpi_led_state_cache[TPACPI_LED_NUMLEDS];
4850 static const char * const tpacpi_led_names[TPACPI_LED_NUMLEDS] = {
4851 /* there's a limit of 19 chars + NULL before 2.6.26 */
4852 "tpacpi::power",
4853 "tpacpi:orange:batt",
4854 "tpacpi:green:batt",
4855 "tpacpi::dock_active",
4856 "tpacpi::bay_active",
4857 "tpacpi::dock_batt",
4858 "tpacpi::unknown_led",
4859 "tpacpi::standby",
4860 "tpacpi::dock_status1",
4861 "tpacpi::dock_status2",
4862 "tpacpi::unknown_led2",
4863 "tpacpi::unknown_led3",
4864 "tpacpi::thinkvantage",
4865 };
4866 #define TPACPI_SAFE_LEDS 0x1081U
4867
4868 static inline bool tpacpi_is_led_restricted(const unsigned int led)
4869 {
4870 #ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS
4871 return false;
4872 #else
4873 return (1U & (TPACPI_SAFE_LEDS >> led)) == 0;
4874 #endif
4875 }
4876
4877 static int led_get_status(const unsigned int led)
4878 {
4879 int status;
4880 enum led_status_t led_s;
4881
4882 switch (led_supported) {
4883 case TPACPI_LED_570:
4884 if (!acpi_evalf(ec_handle,
4885 &status, "GLED", "dd", 1 << led))
4886 return -EIO;
4887 led_s = (status == 0)?
4888 TPACPI_LED_OFF :
4889 ((status == 1)?
4890 TPACPI_LED_ON :
4891 TPACPI_LED_BLINK);
4892 tpacpi_led_state_cache[led] = led_s;
4893 return led_s;
4894 default:
4895 return -ENXIO;
4896 }
4897
4898 /* not reached */
4899 }
4900
4901 static int led_set_status(const unsigned int led,
4902 const enum led_status_t ledstatus)
4903 {
4904 /* off, on, blink. Index is led_status_t */
4905 static const unsigned int led_sled_arg1[] = { 0, 1, 3 };
4906 static const unsigned int led_led_arg1[] = { 0, 0x80, 0xc0 };
4907
4908 int rc = 0;
4909
4910 switch (led_supported) {
4911 case TPACPI_LED_570:
4912 /* 570 */
4913 if (unlikely(led > 7))
4914 return -EINVAL;
4915 if (unlikely(tpacpi_is_led_restricted(led)))
4916 return -EPERM;
4917 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
4918 (1 << led), led_sled_arg1[ledstatus]))
4919 rc = -EIO;
4920 break;
4921 case TPACPI_LED_OLD:
4922 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */
4923 if (unlikely(led > 7))
4924 return -EINVAL;
4925 if (unlikely(tpacpi_is_led_restricted(led)))
4926 return -EPERM;
4927 rc = ec_write(TPACPI_LED_EC_HLMS, (1 << led));
4928 if (rc >= 0)
4929 rc = ec_write(TPACPI_LED_EC_HLBL,
4930 (ledstatus == TPACPI_LED_BLINK) << led);
4931 if (rc >= 0)
4932 rc = ec_write(TPACPI_LED_EC_HLCL,
4933 (ledstatus != TPACPI_LED_OFF) << led);
4934 break;
4935 case TPACPI_LED_NEW:
4936 /* all others */
4937 if (unlikely(led >= TPACPI_LED_NUMLEDS))
4938 return -EINVAL;
4939 if (unlikely(tpacpi_is_led_restricted(led)))
4940 return -EPERM;
4941 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
4942 led, led_led_arg1[ledstatus]))
4943 rc = -EIO;
4944 break;
4945 default:
4946 rc = -ENXIO;
4947 }
4948
4949 if (!rc)
4950 tpacpi_led_state_cache[led] = ledstatus;
4951
4952 return rc;
4953 }
4954
4955 static void led_set_status_worker(struct work_struct *work)
4956 {
4957 struct tpacpi_led_classdev *data =
4958 container_of(work, struct tpacpi_led_classdev, work);
4959
4960 if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING))
4961 led_set_status(data->led, data->new_state);
4962 }
4963
4964 static void led_sysfs_set(struct led_classdev *led_cdev,
4965 enum led_brightness brightness)
4966 {
4967 struct tpacpi_led_classdev *data = container_of(led_cdev,
4968 struct tpacpi_led_classdev, led_classdev);
4969
4970 if (brightness == LED_OFF)
4971 data->new_state = TPACPI_LED_OFF;
4972 else if (tpacpi_led_state_cache[data->led] != TPACPI_LED_BLINK)
4973 data->new_state = TPACPI_LED_ON;
4974 else
4975 data->new_state = TPACPI_LED_BLINK;
4976
4977 queue_work(tpacpi_wq, &data->work);
4978 }
4979
4980 static int led_sysfs_blink_set(struct led_classdev *led_cdev,
4981 unsigned long *delay_on, unsigned long *delay_off)
4982 {
4983 struct tpacpi_led_classdev *data = container_of(led_cdev,
4984 struct tpacpi_led_classdev, led_classdev);
4985
4986 /* Can we choose the flash rate? */
4987 if (*delay_on == 0 && *delay_off == 0) {
4988 /* yes. set them to the hardware blink rate (1 Hz) */
4989 *delay_on = 500; /* ms */
4990 *delay_off = 500; /* ms */
4991 } else if ((*delay_on != 500) || (*delay_off != 500))
4992 return -EINVAL;
4993
4994 data->new_state = TPACPI_LED_BLINK;
4995 queue_work(tpacpi_wq, &data->work);
4996
4997 return 0;
4998 }
4999
5000 static enum led_brightness led_sysfs_get(struct led_classdev *led_cdev)
5001 {
5002 int rc;
5003
5004 struct tpacpi_led_classdev *data = container_of(led_cdev,
5005 struct tpacpi_led_classdev, led_classdev);
5006
5007 rc = led_get_status(data->led);
5008
5009 if (rc == TPACPI_LED_OFF || rc < 0)
5010 rc = LED_OFF; /* no error handling in led class :( */
5011 else
5012 rc = LED_FULL;
5013
5014 return rc;
5015 }
5016
5017 static void led_exit(void)
5018 {
5019 unsigned int i;
5020
5021 for (i = 0; i < TPACPI_LED_NUMLEDS; i++) {
5022 if (tpacpi_leds[i].led_classdev.name)
5023 led_classdev_unregister(&tpacpi_leds[i].led_classdev);
5024 }
5025
5026 kfree(tpacpi_leds);
5027 }
5028
5029 static int __init tpacpi_init_led(unsigned int led)
5030 {
5031 int rc;
5032
5033 tpacpi_leds[led].led = led;
5034
5035 /* LEDs with no name don't get registered */
5036 if (!tpacpi_led_names[led])
5037 return 0;
5038
5039 tpacpi_leds[led].led_classdev.brightness_set = &led_sysfs_set;
5040 tpacpi_leds[led].led_classdev.blink_set = &led_sysfs_blink_set;
5041 if (led_supported == TPACPI_LED_570)
5042 tpacpi_leds[led].led_classdev.brightness_get =
5043 &led_sysfs_get;
5044
5045 tpacpi_leds[led].led_classdev.name = tpacpi_led_names[led];
5046
5047 INIT_WORK(&tpacpi_leds[led].work, led_set_status_worker);
5048
5049 rc = led_classdev_register(&tpacpi_pdev->dev,
5050 &tpacpi_leds[led].led_classdev);
5051 if (rc < 0)
5052 tpacpi_leds[led].led_classdev.name = NULL;
5053
5054 return rc;
5055 }
5056
5057 static const struct tpacpi_quirk led_useful_qtable[] __initconst = {
5058 TPACPI_Q_IBM('1', 'E', 0x009f), /* A30 */
5059 TPACPI_Q_IBM('1', 'N', 0x009f), /* A31 */
5060 TPACPI_Q_IBM('1', 'G', 0x009f), /* A31 */
5061
5062 TPACPI_Q_IBM('1', 'I', 0x0097), /* T30 */
5063 TPACPI_Q_IBM('1', 'R', 0x0097), /* T40, T41, T42, R50, R51 */
5064 TPACPI_Q_IBM('7', '0', 0x0097), /* T43, R52 */
5065 TPACPI_Q_IBM('1', 'Y', 0x0097), /* T43 */
5066 TPACPI_Q_IBM('1', 'W', 0x0097), /* R50e */
5067 TPACPI_Q_IBM('1', 'V', 0x0097), /* R51 */
5068 TPACPI_Q_IBM('7', '8', 0x0097), /* R51e */
5069 TPACPI_Q_IBM('7', '6', 0x0097), /* R52 */
5070
5071 TPACPI_Q_IBM('1', 'K', 0x00bf), /* X30 */
5072 TPACPI_Q_IBM('1', 'Q', 0x00bf), /* X31, X32 */
5073 TPACPI_Q_IBM('1', 'U', 0x00bf), /* X40 */
5074 TPACPI_Q_IBM('7', '4', 0x00bf), /* X41 */
5075 TPACPI_Q_IBM('7', '5', 0x00bf), /* X41t */
5076
5077 TPACPI_Q_IBM('7', '9', 0x1f97), /* T60 (1) */
5078 TPACPI_Q_IBM('7', '7', 0x1f97), /* Z60* (1) */
5079 TPACPI_Q_IBM('7', 'F', 0x1f97), /* Z61* (1) */
5080 TPACPI_Q_IBM('7', 'B', 0x1fb7), /* X60 (1) */
5081
5082 /* (1) - may have excess leds enabled on MSB */
5083
5084 /* Defaults (order matters, keep last, don't reorder!) */
5085 { /* Lenovo */
5086 .vendor = PCI_VENDOR_ID_LENOVO,
5087 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY,
5088 .quirks = 0x1fffU,
5089 },
5090 { /* IBM ThinkPads with no EC version string */
5091 .vendor = PCI_VENDOR_ID_IBM,
5092 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_UNKNOWN,
5093 .quirks = 0x00ffU,
5094 },
5095 { /* IBM ThinkPads with EC version string */
5096 .vendor = PCI_VENDOR_ID_IBM,
5097 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY,
5098 .quirks = 0x00bfU,
5099 },
5100 };
5101
5102 #undef TPACPI_LEDQ_IBM
5103 #undef TPACPI_LEDQ_LNV
5104
5105 static int __init led_init(struct ibm_init_struct *iibm)
5106 {
5107 unsigned int i;
5108 int rc;
5109 unsigned long useful_leds;
5110
5111 vdbg_printk(TPACPI_DBG_INIT, "initializing LED subdriver\n");
5112
5113 TPACPI_ACPIHANDLE_INIT(led);
5114
5115 if (!led_handle)
5116 /* led not supported on R30, R31 */
5117 led_supported = TPACPI_LED_NONE;
5118 else if (strlencmp(led_path, "SLED") == 0)
5119 /* 570 */
5120 led_supported = TPACPI_LED_570;
5121 else if (strlencmp(led_path, "SYSL") == 0)
5122 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
5123 led_supported = TPACPI_LED_OLD;
5124 else
5125 /* all others */
5126 led_supported = TPACPI_LED_NEW;
5127
5128 vdbg_printk(TPACPI_DBG_INIT, "LED commands are %s, mode %d\n",
5129 str_supported(led_supported), led_supported);
5130
5131 if (led_supported == TPACPI_LED_NONE)
5132 return 1;
5133
5134 tpacpi_leds = kzalloc(sizeof(*tpacpi_leds) * TPACPI_LED_NUMLEDS,
5135 GFP_KERNEL);
5136 if (!tpacpi_leds) {
5137 printk(TPACPI_ERR "Out of memory for LED data\n");
5138 return -ENOMEM;
5139 }
5140
5141 useful_leds = tpacpi_check_quirks(led_useful_qtable,
5142 ARRAY_SIZE(led_useful_qtable));
5143
5144 for (i = 0; i < TPACPI_LED_NUMLEDS; i++) {
5145 if (!tpacpi_is_led_restricted(i) &&
5146 test_bit(i, &useful_leds)) {
5147 rc = tpacpi_init_led(i);
5148 if (rc < 0) {
5149 led_exit();
5150 return rc;
5151 }
5152 }
5153 }
5154
5155 #ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS
5156 printk(TPACPI_NOTICE
5157 "warning: userspace override of important "
5158 "firmware LEDs is enabled\n");
5159 #endif
5160 return 0;
5161 }
5162
5163 #define str_led_status(s) \
5164 ((s) == TPACPI_LED_OFF ? "off" : \
5165 ((s) == TPACPI_LED_ON ? "on" : "blinking"))
5166
5167 static int led_read(char *p)
5168 {
5169 int len = 0;
5170
5171 if (!led_supported) {
5172 len += sprintf(p + len, "status:\t\tnot supported\n");
5173 return len;
5174 }
5175 len += sprintf(p + len, "status:\t\tsupported\n");
5176
5177 if (led_supported == TPACPI_LED_570) {
5178 /* 570 */
5179 int i, status;
5180 for (i = 0; i < 8; i++) {
5181 status = led_get_status(i);
5182 if (status < 0)
5183 return -EIO;
5184 len += sprintf(p + len, "%d:\t\t%s\n",
5185 i, str_led_status(status));
5186 }
5187 }
5188
5189 len += sprintf(p + len, "commands:\t"
5190 "<led> on, <led> off, <led> blink (<led> is 0-15)\n");
5191
5192 return len;
5193 }
5194
5195 static int led_write(char *buf)
5196 {
5197 char *cmd;
5198 int led, rc;
5199 enum led_status_t s;
5200
5201 if (!led_supported)
5202 return -ENODEV;
5203
5204 while ((cmd = next_cmd(&buf))) {
5205 if (sscanf(cmd, "%d", &led) != 1 || led < 0 || led > 15)
5206 return -EINVAL;
5207
5208 if (strstr(cmd, "off")) {
5209 s = TPACPI_LED_OFF;
5210 } else if (strstr(cmd, "on")) {
5211 s = TPACPI_LED_ON;
5212 } else if (strstr(cmd, "blink")) {
5213 s = TPACPI_LED_BLINK;
5214 } else {
5215 return -EINVAL;
5216 }
5217
5218 rc = led_set_status(led, s);
5219 if (rc < 0)
5220 return rc;
5221 }
5222
5223 return 0;
5224 }
5225
5226 static struct ibm_struct led_driver_data = {
5227 .name = "led",
5228 .read = led_read,
5229 .write = led_write,
5230 .exit = led_exit,
5231 };
5232
5233 /*************************************************************************
5234 * Beep subdriver
5235 */
5236
5237 TPACPI_HANDLE(beep, ec, "BEEP"); /* all except R30, R31 */
5238
5239 #define TPACPI_BEEP_Q1 0x0001
5240
5241 static const struct tpacpi_quirk beep_quirk_table[] __initconst = {
5242 TPACPI_Q_IBM('I', 'M', TPACPI_BEEP_Q1), /* 570 */
5243 TPACPI_Q_IBM('I', 'U', TPACPI_BEEP_Q1), /* 570E - unverified */
5244 };
5245
5246 static int __init beep_init(struct ibm_init_struct *iibm)
5247 {
5248 unsigned long quirks;
5249
5250 vdbg_printk(TPACPI_DBG_INIT, "initializing beep subdriver\n");
5251
5252 TPACPI_ACPIHANDLE_INIT(beep);
5253
5254 vdbg_printk(TPACPI_DBG_INIT, "beep is %s\n",
5255 str_supported(beep_handle != NULL));
5256
5257 quirks = tpacpi_check_quirks(beep_quirk_table,
5258 ARRAY_SIZE(beep_quirk_table));
5259
5260 tp_features.beep_needs_two_args = !!(quirks & TPACPI_BEEP_Q1);
5261
5262 return (beep_handle)? 0 : 1;
5263 }
5264
5265 static int beep_read(char *p)
5266 {
5267 int len = 0;
5268
5269 if (!beep_handle)
5270 len += sprintf(p + len, "status:\t\tnot supported\n");
5271 else {
5272 len += sprintf(p + len, "status:\t\tsupported\n");
5273 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-17)\n");
5274 }
5275
5276 return len;
5277 }
5278
5279 static int beep_write(char *buf)
5280 {
5281 char *cmd;
5282 int beep_cmd;
5283
5284 if (!beep_handle)
5285 return -ENODEV;
5286
5287 while ((cmd = next_cmd(&buf))) {
5288 if (sscanf(cmd, "%u", &beep_cmd) == 1 &&
5289 beep_cmd >= 0 && beep_cmd <= 17) {
5290 /* beep_cmd set */
5291 } else
5292 return -EINVAL;
5293 if (tp_features.beep_needs_two_args) {
5294 if (!acpi_evalf(beep_handle, NULL, NULL, "vdd",
5295 beep_cmd, 0))
5296 return -EIO;
5297 } else {
5298 if (!acpi_evalf(beep_handle, NULL, NULL, "vd",
5299 beep_cmd))
5300 return -EIO;
5301 }
5302 }
5303
5304 return 0;
5305 }
5306
5307 static struct ibm_struct beep_driver_data = {
5308 .name = "beep",
5309 .read = beep_read,
5310 .write = beep_write,
5311 };
5312
5313 /*************************************************************************
5314 * Thermal subdriver
5315 */
5316
5317 enum thermal_access_mode {
5318 TPACPI_THERMAL_NONE = 0, /* No thermal support */
5319 TPACPI_THERMAL_ACPI_TMP07, /* Use ACPI TMP0-7 */
5320 TPACPI_THERMAL_ACPI_UPDT, /* Use ACPI TMP0-7 with UPDT */
5321 TPACPI_THERMAL_TPEC_8, /* Use ACPI EC regs, 8 sensors */
5322 TPACPI_THERMAL_TPEC_16, /* Use ACPI EC regs, 16 sensors */
5323 };
5324
5325 enum { /* TPACPI_THERMAL_TPEC_* */
5326 TP_EC_THERMAL_TMP0 = 0x78, /* ACPI EC regs TMP 0..7 */
5327 TP_EC_THERMAL_TMP8 = 0xC0, /* ACPI EC regs TMP 8..15 */
5328 TP_EC_THERMAL_TMP_NA = -128, /* ACPI EC sensor not available */
5329 };
5330
5331 #define TPACPI_MAX_THERMAL_SENSORS 16 /* Max thermal sensors supported */
5332 struct ibm_thermal_sensors_struct {
5333 s32 temp[TPACPI_MAX_THERMAL_SENSORS];
5334 };
5335
5336 static enum thermal_access_mode thermal_read_mode;
5337
5338 /* idx is zero-based */
5339 static int thermal_get_sensor(int idx, s32 *value)
5340 {
5341 int t;
5342 s8 tmp;
5343 char tmpi[5];
5344
5345 t = TP_EC_THERMAL_TMP0;
5346
5347 switch (thermal_read_mode) {
5348 #if TPACPI_MAX_THERMAL_SENSORS >= 16
5349 case TPACPI_THERMAL_TPEC_16:
5350 if (idx >= 8 && idx <= 15) {
5351 t = TP_EC_THERMAL_TMP8;
5352 idx -= 8;
5353 }
5354 /* fallthrough */
5355 #endif
5356 case TPACPI_THERMAL_TPEC_8:
5357 if (idx <= 7) {
5358 if (!acpi_ec_read(t + idx, &tmp))
5359 return -EIO;
5360 *value = tmp * 1000;
5361 return 0;
5362 }
5363 break;
5364
5365 case TPACPI_THERMAL_ACPI_UPDT:
5366 if (idx <= 7) {
5367 snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
5368 if (!acpi_evalf(ec_handle, NULL, "UPDT", "v"))
5369 return -EIO;
5370 if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
5371 return -EIO;
5372 *value = (t - 2732) * 100;
5373 return 0;
5374 }
5375 break;
5376
5377 case TPACPI_THERMAL_ACPI_TMP07:
5378 if (idx <= 7) {
5379 snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
5380 if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
5381 return -EIO;
5382 if (t > 127 || t < -127)
5383 t = TP_EC_THERMAL_TMP_NA;
5384 *value = t * 1000;
5385 return 0;
5386 }
5387 break;
5388
5389 case TPACPI_THERMAL_NONE:
5390 default:
5391 return -ENOSYS;
5392 }
5393
5394 return -EINVAL;
5395 }
5396
5397 static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s)
5398 {
5399 int res, i;
5400 int n;
5401
5402 n = 8;
5403 i = 0;
5404
5405 if (!s)
5406 return -EINVAL;
5407
5408 if (thermal_read_mode == TPACPI_THERMAL_TPEC_16)
5409 n = 16;
5410
5411 for (i = 0 ; i < n; i++) {
5412 res = thermal_get_sensor(i, &s->temp[i]);
5413 if (res)
5414 return res;
5415 }
5416
5417 return n;
5418 }
5419
5420 /* sysfs temp##_input -------------------------------------------------- */
5421
5422 static ssize_t thermal_temp_input_show(struct device *dev,
5423 struct device_attribute *attr,
5424 char *buf)
5425 {
5426 struct sensor_device_attribute *sensor_attr =
5427 to_sensor_dev_attr(attr);
5428 int idx = sensor_attr->index;
5429 s32 value;
5430 int res;
5431
5432 res = thermal_get_sensor(idx, &value);
5433 if (res)
5434 return res;
5435 if (value == TP_EC_THERMAL_TMP_NA * 1000)
5436 return -ENXIO;
5437
5438 return snprintf(buf, PAGE_SIZE, "%d\n", value);
5439 }
5440
5441 #define THERMAL_SENSOR_ATTR_TEMP(_idxA, _idxB) \
5442 SENSOR_ATTR(temp##_idxA##_input, S_IRUGO, \
5443 thermal_temp_input_show, NULL, _idxB)
5444
5445 static struct sensor_device_attribute sensor_dev_attr_thermal_temp_input[] = {
5446 THERMAL_SENSOR_ATTR_TEMP(1, 0),
5447 THERMAL_SENSOR_ATTR_TEMP(2, 1),
5448 THERMAL_SENSOR_ATTR_TEMP(3, 2),
5449 THERMAL_SENSOR_ATTR_TEMP(4, 3),
5450 THERMAL_SENSOR_ATTR_TEMP(5, 4),
5451 THERMAL_SENSOR_ATTR_TEMP(6, 5),
5452 THERMAL_SENSOR_ATTR_TEMP(7, 6),
5453 THERMAL_SENSOR_ATTR_TEMP(8, 7),
5454 THERMAL_SENSOR_ATTR_TEMP(9, 8),
5455 THERMAL_SENSOR_ATTR_TEMP(10, 9),
5456 THERMAL_SENSOR_ATTR_TEMP(11, 10),
5457 THERMAL_SENSOR_ATTR_TEMP(12, 11),
5458 THERMAL_SENSOR_ATTR_TEMP(13, 12),
5459 THERMAL_SENSOR_ATTR_TEMP(14, 13),
5460 THERMAL_SENSOR_ATTR_TEMP(15, 14),
5461 THERMAL_SENSOR_ATTR_TEMP(16, 15),
5462 };
5463
5464 #define THERMAL_ATTRS(X) \
5465 &sensor_dev_attr_thermal_temp_input[X].dev_attr.attr
5466
5467 static struct attribute *thermal_temp_input_attr[] = {
5468 THERMAL_ATTRS(8),
5469 THERMAL_ATTRS(9),
5470 THERMAL_ATTRS(10),
5471 THERMAL_ATTRS(11),
5472 THERMAL_ATTRS(12),
5473 THERMAL_ATTRS(13),
5474 THERMAL_ATTRS(14),
5475 THERMAL_ATTRS(15),
5476 THERMAL_ATTRS(0),
5477 THERMAL_ATTRS(1),
5478 THERMAL_ATTRS(2),
5479 THERMAL_ATTRS(3),
5480 THERMAL_ATTRS(4),
5481 THERMAL_ATTRS(5),
5482 THERMAL_ATTRS(6),
5483 THERMAL_ATTRS(7),
5484 NULL
5485 };
5486
5487 static const struct attribute_group thermal_temp_input16_group = {
5488 .attrs = thermal_temp_input_attr
5489 };
5490
5491 static const struct attribute_group thermal_temp_input8_group = {
5492 .attrs = &thermal_temp_input_attr[8]
5493 };
5494
5495 #undef THERMAL_SENSOR_ATTR_TEMP
5496 #undef THERMAL_ATTRS
5497
5498 /* --------------------------------------------------------------------- */
5499
5500 static int __init thermal_init(struct ibm_init_struct *iibm)
5501 {
5502 u8 t, ta1, ta2;
5503 int i;
5504 int acpi_tmp7;
5505 int res;
5506
5507 vdbg_printk(TPACPI_DBG_INIT, "initializing thermal subdriver\n");
5508
5509 acpi_tmp7 = acpi_evalf(ec_handle, NULL, "TMP7", "qv");
5510
5511 if (thinkpad_id.ec_model) {
5512 /*
5513 * Direct EC access mode: sensors at registers
5514 * 0x78-0x7F, 0xC0-0xC7. Registers return 0x00 for
5515 * non-implemented, thermal sensors return 0x80 when
5516 * not available
5517 */
5518
5519 ta1 = ta2 = 0;
5520 for (i = 0; i < 8; i++) {
5521 if (acpi_ec_read(TP_EC_THERMAL_TMP0 + i, &t)) {
5522 ta1 |= t;
5523 } else {
5524 ta1 = 0;
5525 break;
5526 }
5527 if (acpi_ec_read(TP_EC_THERMAL_TMP8 + i, &t)) {
5528 ta2 |= t;
5529 } else {
5530 ta1 = 0;
5531 break;
5532 }
5533 }
5534 if (ta1 == 0) {
5535 /* This is sheer paranoia, but we handle it anyway */
5536 if (acpi_tmp7) {
5537 printk(TPACPI_ERR
5538 "ThinkPad ACPI EC access misbehaving, "
5539 "falling back to ACPI TMPx access "
5540 "mode\n");
5541 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
5542 } else {
5543 printk(TPACPI_ERR
5544 "ThinkPad ACPI EC access misbehaving, "
5545 "disabling thermal sensors access\n");
5546 thermal_read_mode = TPACPI_THERMAL_NONE;
5547 }
5548 } else {
5549 thermal_read_mode =
5550 (ta2 != 0) ?
5551 TPACPI_THERMAL_TPEC_16 : TPACPI_THERMAL_TPEC_8;
5552 }
5553 } else if (acpi_tmp7) {
5554 if (acpi_evalf(ec_handle, NULL, "UPDT", "qv")) {
5555 /* 600e/x, 770e, 770x */
5556 thermal_read_mode = TPACPI_THERMAL_ACPI_UPDT;
5557 } else {
5558 /* Standard ACPI TMPx access, max 8 sensors */
5559 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
5560 }
5561 } else {
5562 /* temperatures not supported on 570, G4x, R30, R31, R32 */
5563 thermal_read_mode = TPACPI_THERMAL_NONE;
5564 }
5565
5566 vdbg_printk(TPACPI_DBG_INIT, "thermal is %s, mode %d\n",
5567 str_supported(thermal_read_mode != TPACPI_THERMAL_NONE),
5568 thermal_read_mode);
5569
5570 switch (thermal_read_mode) {
5571 case TPACPI_THERMAL_TPEC_16:
5572 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
5573 &thermal_temp_input16_group);
5574 if (res)
5575 return res;
5576 break;
5577 case TPACPI_THERMAL_TPEC_8:
5578 case TPACPI_THERMAL_ACPI_TMP07:
5579 case TPACPI_THERMAL_ACPI_UPDT:
5580 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
5581 &thermal_temp_input8_group);
5582 if (res)
5583 return res;
5584 break;
5585 case TPACPI_THERMAL_NONE:
5586 default:
5587 return 1;
5588 }
5589
5590 return 0;
5591 }
5592
5593 static void thermal_exit(void)
5594 {
5595 switch (thermal_read_mode) {
5596 case TPACPI_THERMAL_TPEC_16:
5597 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
5598 &thermal_temp_input16_group);
5599 break;
5600 case TPACPI_THERMAL_TPEC_8:
5601 case TPACPI_THERMAL_ACPI_TMP07:
5602 case TPACPI_THERMAL_ACPI_UPDT:
5603 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
5604 &thermal_temp_input16_group);
5605 break;
5606 case TPACPI_THERMAL_NONE:
5607 default:
5608 break;
5609 }
5610 }
5611
5612 static int thermal_read(char *p)
5613 {
5614 int len = 0;
5615 int n, i;
5616 struct ibm_thermal_sensors_struct t;
5617
5618 n = thermal_get_sensors(&t);
5619 if (unlikely(n < 0))
5620 return n;
5621
5622 len += sprintf(p + len, "temperatures:\t");
5623
5624 if (n > 0) {
5625 for (i = 0; i < (n - 1); i++)
5626 len += sprintf(p + len, "%d ", t.temp[i] / 1000);
5627 len += sprintf(p + len, "%d\n", t.temp[i] / 1000);
5628 } else
5629 len += sprintf(p + len, "not supported\n");
5630
5631 return len;
5632 }
5633
5634 static struct ibm_struct thermal_driver_data = {
5635 .name = "thermal",
5636 .read = thermal_read,
5637 .exit = thermal_exit,
5638 };
5639
5640 /*************************************************************************
5641 * EC Dump subdriver
5642 */
5643
5644 static u8 ecdump_regs[256];
5645
5646 static int ecdump_read(char *p)
5647 {
5648 int len = 0;
5649 int i, j;
5650 u8 v;
5651
5652 len += sprintf(p + len, "EC "
5653 " +00 +01 +02 +03 +04 +05 +06 +07"
5654 " +08 +09 +0a +0b +0c +0d +0e +0f\n");
5655 for (i = 0; i < 256; i += 16) {
5656 len += sprintf(p + len, "EC 0x%02x:", i);
5657 for (j = 0; j < 16; j++) {
5658 if (!acpi_ec_read(i + j, &v))
5659 break;
5660 if (v != ecdump_regs[i + j])
5661 len += sprintf(p + len, " *%02x", v);
5662 else
5663 len += sprintf(p + len, " %02x", v);
5664 ecdump_regs[i + j] = v;
5665 }
5666 len += sprintf(p + len, "\n");
5667 if (j != 16)
5668 break;
5669 }
5670
5671 /* These are way too dangerous to advertise openly... */
5672 #if 0
5673 len += sprintf(p + len, "commands:\t0x<offset> 0x<value>"
5674 " (<offset> is 00-ff, <value> is 00-ff)\n");
5675 len += sprintf(p + len, "commands:\t0x<offset> <value> "
5676 " (<offset> is 00-ff, <value> is 0-255)\n");
5677 #endif
5678 return len;
5679 }
5680
5681 static int ecdump_write(char *buf)
5682 {
5683 char *cmd;
5684 int i, v;
5685
5686 while ((cmd = next_cmd(&buf))) {
5687 if (sscanf(cmd, "0x%x 0x%x", &i, &v) == 2) {
5688 /* i and v set */
5689 } else if (sscanf(cmd, "0x%x %u", &i, &v) == 2) {
5690 /* i and v set */
5691 } else
5692 return -EINVAL;
5693 if (i >= 0 && i < 256 && v >= 0 && v < 256) {
5694 if (!acpi_ec_write(i, v))
5695 return -EIO;
5696 } else
5697 return -EINVAL;
5698 }
5699
5700 return 0;
5701 }
5702
5703 static struct ibm_struct ecdump_driver_data = {
5704 .name = "ecdump",
5705 .read = ecdump_read,
5706 .write = ecdump_write,
5707 .flags.experimental = 1,
5708 };
5709
5710 /*************************************************************************
5711 * Backlight/brightness subdriver
5712 */
5713
5714 #define TPACPI_BACKLIGHT_DEV_NAME "thinkpad_screen"
5715
5716 /*
5717 * ThinkPads can read brightness from two places: EC HBRV (0x31), or
5718 * CMOS NVRAM byte 0x5E, bits 0-3.
5719 *
5720 * EC HBRV (0x31) has the following layout
5721 * Bit 7: unknown function
5722 * Bit 6: unknown function
5723 * Bit 5: Z: honour scale changes, NZ: ignore scale changes
5724 * Bit 4: must be set to zero to avoid problems
5725 * Bit 3-0: backlight brightness level
5726 *
5727 * brightness_get_raw returns status data in the HBRV layout
5728 *
5729 * WARNING: The X61 has been verified to use HBRV for something else, so
5730 * this should be used _only_ on IBM ThinkPads, and maybe with some careful
5731 * testing on the very early *60 Lenovo models...
5732 */
5733
5734 enum {
5735 TP_EC_BACKLIGHT = 0x31,
5736
5737 /* TP_EC_BACKLIGHT bitmasks */
5738 TP_EC_BACKLIGHT_LVLMSK = 0x1F,
5739 TP_EC_BACKLIGHT_CMDMSK = 0xE0,
5740 TP_EC_BACKLIGHT_MAPSW = 0x20,
5741 };
5742
5743 enum tpacpi_brightness_access_mode {
5744 TPACPI_BRGHT_MODE_AUTO = 0, /* Not implemented yet */
5745 TPACPI_BRGHT_MODE_EC, /* EC control */
5746 TPACPI_BRGHT_MODE_UCMS_STEP, /* UCMS step-based control */
5747 TPACPI_BRGHT_MODE_ECNVRAM, /* EC control w/ NVRAM store */
5748 TPACPI_BRGHT_MODE_MAX
5749 };
5750
5751 static struct backlight_device *ibm_backlight_device;
5752
5753 static enum tpacpi_brightness_access_mode brightness_mode =
5754 TPACPI_BRGHT_MODE_MAX;
5755
5756 static unsigned int brightness_enable = 2; /* 2 = auto, 0 = no, 1 = yes */
5757
5758 static struct mutex brightness_mutex;
5759
5760 /* NVRAM brightness access,
5761 * call with brightness_mutex held! */
5762 static unsigned int tpacpi_brightness_nvram_get(void)
5763 {
5764 u8 lnvram;
5765
5766 lnvram = (nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS)
5767 & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
5768 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
5769 lnvram &= (tp_features.bright_16levels) ? 0x0f : 0x07;
5770
5771 return lnvram;
5772 }
5773
5774 static void tpacpi_brightness_checkpoint_nvram(void)
5775 {
5776 u8 lec = 0;
5777 u8 b_nvram;
5778
5779 if (brightness_mode != TPACPI_BRGHT_MODE_ECNVRAM)
5780 return;
5781
5782 vdbg_printk(TPACPI_DBG_BRGHT,
5783 "trying to checkpoint backlight level to NVRAM...\n");
5784
5785 if (mutex_lock_killable(&brightness_mutex) < 0)
5786 return;
5787
5788 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
5789 goto unlock;
5790 lec &= TP_EC_BACKLIGHT_LVLMSK;
5791 b_nvram = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS);
5792
5793 if (lec != ((b_nvram & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
5794 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS)) {
5795 /* NVRAM needs update */
5796 b_nvram &= ~(TP_NVRAM_MASK_LEVEL_BRIGHTNESS <<
5797 TP_NVRAM_POS_LEVEL_BRIGHTNESS);
5798 b_nvram |= lec;
5799 nvram_write_byte(b_nvram, TP_NVRAM_ADDR_BRIGHTNESS);
5800 dbg_printk(TPACPI_DBG_BRGHT,
5801 "updated NVRAM backlight level to %u (0x%02x)\n",
5802 (unsigned int) lec, (unsigned int) b_nvram);
5803 } else
5804 vdbg_printk(TPACPI_DBG_BRGHT,
5805 "NVRAM backlight level already is %u (0x%02x)\n",
5806 (unsigned int) lec, (unsigned int) b_nvram);
5807
5808 unlock:
5809 mutex_unlock(&brightness_mutex);
5810 }
5811
5812
5813 /* call with brightness_mutex held! */
5814 static int tpacpi_brightness_get_raw(int *status)
5815 {
5816 u8 lec = 0;
5817
5818 switch (brightness_mode) {
5819 case TPACPI_BRGHT_MODE_UCMS_STEP:
5820 *status = tpacpi_brightness_nvram_get();
5821 return 0;
5822 case TPACPI_BRGHT_MODE_EC:
5823 case TPACPI_BRGHT_MODE_ECNVRAM:
5824 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
5825 return -EIO;
5826 *status = lec;
5827 return 0;
5828 default:
5829 return -ENXIO;
5830 }
5831 }
5832
5833 /* call with brightness_mutex held! */
5834 /* do NOT call with illegal backlight level value */
5835 static int tpacpi_brightness_set_ec(unsigned int value)
5836 {
5837 u8 lec = 0;
5838
5839 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
5840 return -EIO;
5841
5842 if (unlikely(!acpi_ec_write(TP_EC_BACKLIGHT,
5843 (lec & TP_EC_BACKLIGHT_CMDMSK) |
5844 (value & TP_EC_BACKLIGHT_LVLMSK))))
5845 return -EIO;
5846
5847 return 0;
5848 }
5849
5850 /* call with brightness_mutex held! */
5851 static int tpacpi_brightness_set_ucmsstep(unsigned int value)
5852 {
5853 int cmos_cmd, inc;
5854 unsigned int current_value, i;
5855
5856 current_value = tpacpi_brightness_nvram_get();
5857
5858 if (value == current_value)
5859 return 0;
5860
5861 cmos_cmd = (value > current_value) ?
5862 TP_CMOS_BRIGHTNESS_UP :
5863 TP_CMOS_BRIGHTNESS_DOWN;
5864 inc = (value > current_value) ? 1 : -1;
5865
5866 for (i = current_value; i != value; i += inc)
5867 if (issue_thinkpad_cmos_command(cmos_cmd))
5868 return -EIO;
5869
5870 return 0;
5871 }
5872
5873 /* May return EINTR which can always be mapped to ERESTARTSYS */
5874 static int brightness_set(unsigned int value)
5875 {
5876 int res;
5877
5878 if (value > ((tp_features.bright_16levels)? 15 : 7) ||
5879 value < 0)
5880 return -EINVAL;
5881
5882 vdbg_printk(TPACPI_DBG_BRGHT,
5883 "set backlight level to %d\n", value);
5884
5885 res = mutex_lock_killable(&brightness_mutex);
5886 if (res < 0)
5887 return res;
5888
5889 switch (brightness_mode) {
5890 case TPACPI_BRGHT_MODE_EC:
5891 case TPACPI_BRGHT_MODE_ECNVRAM:
5892 res = tpacpi_brightness_set_ec(value);
5893 break;
5894 case TPACPI_BRGHT_MODE_UCMS_STEP:
5895 res = tpacpi_brightness_set_ucmsstep(value);
5896 break;
5897 default:
5898 res = -ENXIO;
5899 }
5900
5901 mutex_unlock(&brightness_mutex);
5902 return res;
5903 }
5904
5905 /* sysfs backlight class ----------------------------------------------- */
5906
5907 static int brightness_update_status(struct backlight_device *bd)
5908 {
5909 unsigned int level =
5910 (bd->props.fb_blank == FB_BLANK_UNBLANK &&
5911 bd->props.power == FB_BLANK_UNBLANK) ?
5912 bd->props.brightness : 0;
5913
5914 dbg_printk(TPACPI_DBG_BRGHT,
5915 "backlight: attempt to set level to %d\n",
5916 level);
5917
5918 /* it is the backlight class's job (caller) to handle
5919 * EINTR and other errors properly */
5920 return brightness_set(level);
5921 }
5922
5923 static int brightness_get(struct backlight_device *bd)
5924 {
5925 int status, res;
5926
5927 res = mutex_lock_killable(&brightness_mutex);
5928 if (res < 0)
5929 return 0;
5930
5931 res = tpacpi_brightness_get_raw(&status);
5932
5933 mutex_unlock(&brightness_mutex);
5934
5935 if (res < 0)
5936 return 0;
5937
5938 return status & TP_EC_BACKLIGHT_LVLMSK;
5939 }
5940
5941 static struct backlight_ops ibm_backlight_data = {
5942 .get_brightness = brightness_get,
5943 .update_status = brightness_update_status,
5944 };
5945
5946 /* --------------------------------------------------------------------- */
5947
5948 static int __init brightness_init(struct ibm_init_struct *iibm)
5949 {
5950 int b;
5951
5952 vdbg_printk(TPACPI_DBG_INIT, "initializing brightness subdriver\n");
5953
5954 mutex_init(&brightness_mutex);
5955
5956 /*
5957 * We always attempt to detect acpi support, so as to switch
5958 * Lenovo Vista BIOS to ACPI brightness mode even if we are not
5959 * going to publish a backlight interface
5960 */
5961 b = tpacpi_check_std_acpi_brightness_support();
5962 if (b > 0) {
5963
5964 if (acpi_video_backlight_support()) {
5965 if (brightness_enable > 1) {
5966 printk(TPACPI_NOTICE
5967 "Standard ACPI backlight interface "
5968 "available, not loading native one.\n");
5969 return 1;
5970 } else if (brightness_enable == 1) {
5971 printk(TPACPI_NOTICE
5972 "Backlight control force enabled, even if standard "
5973 "ACPI backlight interface is available\n");
5974 }
5975 } else {
5976 if (brightness_enable > 1) {
5977 printk(TPACPI_NOTICE
5978 "Standard ACPI backlight interface not "
5979 "available, thinkpad_acpi native "
5980 "brightness control enabled\n");
5981 }
5982 }
5983 }
5984
5985 if (!brightness_enable) {
5986 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT,
5987 "brightness support disabled by "
5988 "module parameter\n");
5989 return 1;
5990 }
5991
5992 if (b > 16) {
5993 printk(TPACPI_ERR
5994 "Unsupported brightness interface, "
5995 "please contact %s\n", TPACPI_MAIL);
5996 return 1;
5997 }
5998 if (b == 16)
5999 tp_features.bright_16levels = 1;
6000
6001 /*
6002 * Check for module parameter bogosity, note that we
6003 * init brightness_mode to TPACPI_BRGHT_MODE_MAX in order to be
6004 * able to detect "unspecified"
6005 */
6006 if (brightness_mode > TPACPI_BRGHT_MODE_MAX)
6007 return -EINVAL;
6008
6009 /* TPACPI_BRGHT_MODE_AUTO not implemented yet, just use default */
6010 if (brightness_mode == TPACPI_BRGHT_MODE_AUTO ||
6011 brightness_mode == TPACPI_BRGHT_MODE_MAX) {
6012 if (thinkpad_id.vendor == PCI_VENDOR_ID_IBM) {
6013 /*
6014 * IBM models that define HBRV probably have
6015 * EC-based backlight level control
6016 */
6017 if (acpi_evalf(ec_handle, NULL, "HBRV", "qd"))
6018 /* T40-T43, R50-R52, R50e, R51e, X31-X41 */
6019 brightness_mode = TPACPI_BRGHT_MODE_ECNVRAM;
6020 else
6021 /* all other IBM ThinkPads */
6022 brightness_mode = TPACPI_BRGHT_MODE_UCMS_STEP;
6023 } else
6024 /* All Lenovo ThinkPads */
6025 brightness_mode = TPACPI_BRGHT_MODE_UCMS_STEP;
6026
6027 dbg_printk(TPACPI_DBG_BRGHT,
6028 "selected brightness_mode=%d\n",
6029 brightness_mode);
6030 }
6031
6032 /* Safety */
6033 if (thinkpad_id.vendor != PCI_VENDOR_ID_IBM &&
6034 (brightness_mode == TPACPI_BRGHT_MODE_ECNVRAM ||
6035 brightness_mode == TPACPI_BRGHT_MODE_EC))
6036 return -EINVAL;
6037
6038 if (tpacpi_brightness_get_raw(&b) < 0)
6039 return 1;
6040
6041 if (tp_features.bright_16levels)
6042 printk(TPACPI_INFO
6043 "detected a 16-level brightness capable ThinkPad\n");
6044
6045 ibm_backlight_device = backlight_device_register(
6046 TPACPI_BACKLIGHT_DEV_NAME, NULL, NULL,
6047 &ibm_backlight_data);
6048 if (IS_ERR(ibm_backlight_device)) {
6049 printk(TPACPI_ERR "Could not register backlight device\n");
6050 return PTR_ERR(ibm_backlight_device);
6051 }
6052 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT,
6053 "brightness is supported\n");
6054
6055 ibm_backlight_device->props.max_brightness =
6056 (tp_features.bright_16levels)? 15 : 7;
6057 ibm_backlight_device->props.brightness = b & TP_EC_BACKLIGHT_LVLMSK;
6058 backlight_update_status(ibm_backlight_device);
6059
6060 return 0;
6061 }
6062
6063 static void brightness_suspend(pm_message_t state)
6064 {
6065 tpacpi_brightness_checkpoint_nvram();
6066 }
6067
6068 static void brightness_shutdown(void)
6069 {
6070 tpacpi_brightness_checkpoint_nvram();
6071 }
6072
6073 static void brightness_exit(void)
6074 {
6075 if (ibm_backlight_device) {
6076 vdbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_BRGHT,
6077 "calling backlight_device_unregister()\n");
6078 backlight_device_unregister(ibm_backlight_device);
6079 }
6080
6081 tpacpi_brightness_checkpoint_nvram();
6082 }
6083
6084 static int brightness_read(char *p)
6085 {
6086 int len = 0;
6087 int level;
6088
6089 level = brightness_get(NULL);
6090 if (level < 0) {
6091 len += sprintf(p + len, "level:\t\tunreadable\n");
6092 } else {
6093 len += sprintf(p + len, "level:\t\t%d\n", level);
6094 len += sprintf(p + len, "commands:\tup, down\n");
6095 len += sprintf(p + len, "commands:\tlevel <level>"
6096 " (<level> is 0-%d)\n",
6097 (tp_features.bright_16levels) ? 15 : 7);
6098 }
6099
6100 return len;
6101 }
6102
6103 static int brightness_write(char *buf)
6104 {
6105 int level;
6106 int rc;
6107 char *cmd;
6108 int max_level = (tp_features.bright_16levels) ? 15 : 7;
6109
6110 level = brightness_get(NULL);
6111 if (level < 0)
6112 return level;
6113
6114 while ((cmd = next_cmd(&buf))) {
6115 if (strlencmp(cmd, "up") == 0) {
6116 if (level < max_level)
6117 level++;
6118 } else if (strlencmp(cmd, "down") == 0) {
6119 if (level > 0)
6120 level--;
6121 } else if (sscanf(cmd, "level %d", &level) == 1 &&
6122 level >= 0 && level <= max_level) {
6123 /* new level set */
6124 } else
6125 return -EINVAL;
6126 }
6127
6128 tpacpi_disclose_usertask("procfs brightness",
6129 "set level to %d\n", level);
6130
6131 /*
6132 * Now we know what the final level should be, so we try to set it.
6133 * Doing it this way makes the syscall restartable in case of EINTR
6134 */
6135 rc = brightness_set(level);
6136 return (rc == -EINTR)? ERESTARTSYS : rc;
6137 }
6138
6139 static struct ibm_struct brightness_driver_data = {
6140 .name = "brightness",
6141 .read = brightness_read,
6142 .write = brightness_write,
6143 .exit = brightness_exit,
6144 .suspend = brightness_suspend,
6145 .shutdown = brightness_shutdown,
6146 };
6147
6148 /*************************************************************************
6149 * Volume subdriver
6150 */
6151
6152 static int volume_offset = 0x30;
6153
6154 static int volume_read(char *p)
6155 {
6156 int len = 0;
6157 u8 level;
6158
6159 if (!acpi_ec_read(volume_offset, &level)) {
6160 len += sprintf(p + len, "level:\t\tunreadable\n");
6161 } else {
6162 len += sprintf(p + len, "level:\t\t%d\n", level & 0xf);
6163 len += sprintf(p + len, "mute:\t\t%s\n", onoff(level, 6));
6164 len += sprintf(p + len, "commands:\tup, down, mute\n");
6165 len += sprintf(p + len, "commands:\tlevel <level>"
6166 " (<level> is 0-15)\n");
6167 }
6168
6169 return len;
6170 }
6171
6172 static int volume_write(char *buf)
6173 {
6174 int cmos_cmd, inc, i;
6175 u8 level, mute;
6176 int new_level, new_mute;
6177 char *cmd;
6178
6179 while ((cmd = next_cmd(&buf))) {
6180 if (!acpi_ec_read(volume_offset, &level))
6181 return -EIO;
6182 new_mute = mute = level & 0x40;
6183 new_level = level = level & 0xf;
6184
6185 if (strlencmp(cmd, "up") == 0) {
6186 if (mute)
6187 new_mute = 0;
6188 else
6189 new_level = level == 15 ? 15 : level + 1;
6190 } else if (strlencmp(cmd, "down") == 0) {
6191 if (mute)
6192 new_mute = 0;
6193 else
6194 new_level = level == 0 ? 0 : level - 1;
6195 } else if (sscanf(cmd, "level %d", &new_level) == 1 &&
6196 new_level >= 0 && new_level <= 15) {
6197 /* new_level set */
6198 } else if (strlencmp(cmd, "mute") == 0) {
6199 new_mute = 0x40;
6200 } else
6201 return -EINVAL;
6202
6203 if (new_level != level) {
6204 /* mute doesn't change */
6205
6206 cmos_cmd = (new_level > level) ?
6207 TP_CMOS_VOLUME_UP : TP_CMOS_VOLUME_DOWN;
6208 inc = new_level > level ? 1 : -1;
6209
6210 if (mute && (issue_thinkpad_cmos_command(cmos_cmd) ||
6211 !acpi_ec_write(volume_offset, level)))
6212 return -EIO;
6213
6214 for (i = level; i != new_level; i += inc)
6215 if (issue_thinkpad_cmos_command(cmos_cmd) ||
6216 !acpi_ec_write(volume_offset, i + inc))
6217 return -EIO;
6218
6219 if (mute &&
6220 (issue_thinkpad_cmos_command(TP_CMOS_VOLUME_MUTE) ||
6221 !acpi_ec_write(volume_offset, new_level + mute))) {
6222 return -EIO;
6223 }
6224 }
6225
6226 if (new_mute != mute) {
6227 /* level doesn't change */
6228
6229 cmos_cmd = (new_mute) ?
6230 TP_CMOS_VOLUME_MUTE : TP_CMOS_VOLUME_UP;
6231
6232 if (issue_thinkpad_cmos_command(cmos_cmd) ||
6233 !acpi_ec_write(volume_offset, level + new_mute))
6234 return -EIO;
6235 }
6236 }
6237
6238 return 0;
6239 }
6240
6241 static struct ibm_struct volume_driver_data = {
6242 .name = "volume",
6243 .read = volume_read,
6244 .write = volume_write,
6245 };
6246
6247 /*************************************************************************
6248 * Fan subdriver
6249 */
6250
6251 /*
6252 * FAN ACCESS MODES
6253 *
6254 * TPACPI_FAN_RD_ACPI_GFAN:
6255 * ACPI GFAN method: returns fan level
6256 *
6257 * see TPACPI_FAN_WR_ACPI_SFAN
6258 * EC 0x2f (HFSP) not available if GFAN exists
6259 *
6260 * TPACPI_FAN_WR_ACPI_SFAN:
6261 * ACPI SFAN method: sets fan level, 0 (stop) to 7 (max)
6262 *
6263 * EC 0x2f (HFSP) might be available *for reading*, but do not use
6264 * it for writing.
6265 *
6266 * TPACPI_FAN_WR_TPEC:
6267 * ThinkPad EC register 0x2f (HFSP): fan control loop mode
6268 * Supported on almost all ThinkPads
6269 *
6270 * Fan speed changes of any sort (including those caused by the
6271 * disengaged mode) are usually done slowly by the firmware as the
6272 * maximum ammount of fan duty cycle change per second seems to be
6273 * limited.
6274 *
6275 * Reading is not available if GFAN exists.
6276 * Writing is not available if SFAN exists.
6277 *
6278 * Bits
6279 * 7 automatic mode engaged;
6280 * (default operation mode of the ThinkPad)
6281 * fan level is ignored in this mode.
6282 * 6 full speed mode (takes precedence over bit 7);
6283 * not available on all thinkpads. May disable
6284 * the tachometer while the fan controller ramps up
6285 * the speed (which can take up to a few *minutes*).
6286 * Speeds up fan to 100% duty-cycle, which is far above
6287 * the standard RPM levels. It is not impossible that
6288 * it could cause hardware damage.
6289 * 5-3 unused in some models. Extra bits for fan level
6290 * in others, but still useless as all values above
6291 * 7 map to the same speed as level 7 in these models.
6292 * 2-0 fan level (0..7 usually)
6293 * 0x00 = stop
6294 * 0x07 = max (set when temperatures critical)
6295 * Some ThinkPads may have other levels, see
6296 * TPACPI_FAN_WR_ACPI_FANS (X31/X40/X41)
6297 *
6298 * FIRMWARE BUG: on some models, EC 0x2f might not be initialized at
6299 * boot. Apparently the EC does not intialize it, so unless ACPI DSDT
6300 * does so, its initial value is meaningless (0x07).
6301 *
6302 * For firmware bugs, refer to:
6303 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
6304 *
6305 * ----
6306 *
6307 * ThinkPad EC register 0x84 (LSB), 0x85 (MSB):
6308 * Main fan tachometer reading (in RPM)
6309 *
6310 * This register is present on all ThinkPads with a new-style EC, and
6311 * it is known not to be present on the A21m/e, and T22, as there is
6312 * something else in offset 0x84 according to the ACPI DSDT. Other
6313 * ThinkPads from this same time period (and earlier) probably lack the
6314 * tachometer as well.
6315 *
6316 * Unfortunately a lot of ThinkPads with new-style ECs but whose firmware
6317 * was never fixed by IBM to report the EC firmware version string
6318 * probably support the tachometer (like the early X models), so
6319 * detecting it is quite hard. We need more data to know for sure.
6320 *
6321 * FIRMWARE BUG: always read 0x84 first, otherwise incorrect readings
6322 * might result.
6323 *
6324 * FIRMWARE BUG: may go stale while the EC is switching to full speed
6325 * mode.
6326 *
6327 * For firmware bugs, refer to:
6328 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
6329 *
6330 * ----
6331 *
6332 * ThinkPad EC register 0x31 bit 0 (only on select models)
6333 *
6334 * When bit 0 of EC register 0x31 is zero, the tachometer registers
6335 * show the speed of the main fan. When bit 0 of EC register 0x31
6336 * is one, the tachometer registers show the speed of the auxiliary
6337 * fan.
6338 *
6339 * Fan control seems to affect both fans, regardless of the state
6340 * of this bit.
6341 *
6342 * So far, only the firmware for the X60/X61 non-tablet versions
6343 * seem to support this (firmware TP-7M).
6344 *
6345 * TPACPI_FAN_WR_ACPI_FANS:
6346 * ThinkPad X31, X40, X41. Not available in the X60.
6347 *
6348 * FANS ACPI handle: takes three arguments: low speed, medium speed,
6349 * high speed. ACPI DSDT seems to map these three speeds to levels
6350 * as follows: STOP LOW LOW MED MED HIGH HIGH HIGH HIGH
6351 * (this map is stored on FAN0..FAN8 as "0,1,1,2,2,3,3,3,3")
6352 *
6353 * The speeds are stored on handles
6354 * (FANA:FAN9), (FANC:FANB), (FANE:FAND).
6355 *
6356 * There are three default speed sets, acessible as handles:
6357 * FS1L,FS1M,FS1H; FS2L,FS2M,FS2H; FS3L,FS3M,FS3H
6358 *
6359 * ACPI DSDT switches which set is in use depending on various
6360 * factors.
6361 *
6362 * TPACPI_FAN_WR_TPEC is also available and should be used to
6363 * command the fan. The X31/X40/X41 seems to have 8 fan levels,
6364 * but the ACPI tables just mention level 7.
6365 */
6366
6367 enum { /* Fan control constants */
6368 fan_status_offset = 0x2f, /* EC register 0x2f */
6369 fan_rpm_offset = 0x84, /* EC register 0x84: LSB, 0x85 MSB (RPM)
6370 * 0x84 must be read before 0x85 */
6371 fan_select_offset = 0x31, /* EC register 0x31 (Firmware 7M)
6372 bit 0 selects which fan is active */
6373
6374 TP_EC_FAN_FULLSPEED = 0x40, /* EC fan mode: full speed */
6375 TP_EC_FAN_AUTO = 0x80, /* EC fan mode: auto fan control */
6376
6377 TPACPI_FAN_LAST_LEVEL = 0x100, /* Use cached last-seen fan level */
6378 };
6379
6380 enum fan_status_access_mode {
6381 TPACPI_FAN_NONE = 0, /* No fan status or control */
6382 TPACPI_FAN_RD_ACPI_GFAN, /* Use ACPI GFAN */
6383 TPACPI_FAN_RD_TPEC, /* Use ACPI EC regs 0x2f, 0x84-0x85 */
6384 };
6385
6386 enum fan_control_access_mode {
6387 TPACPI_FAN_WR_NONE = 0, /* No fan control */
6388 TPACPI_FAN_WR_ACPI_SFAN, /* Use ACPI SFAN */
6389 TPACPI_FAN_WR_TPEC, /* Use ACPI EC reg 0x2f */
6390 TPACPI_FAN_WR_ACPI_FANS, /* Use ACPI FANS and EC reg 0x2f */
6391 };
6392
6393 enum fan_control_commands {
6394 TPACPI_FAN_CMD_SPEED = 0x0001, /* speed command */
6395 TPACPI_FAN_CMD_LEVEL = 0x0002, /* level command */
6396 TPACPI_FAN_CMD_ENABLE = 0x0004, /* enable/disable cmd,
6397 * and also watchdog cmd */
6398 };
6399
6400 static int fan_control_allowed;
6401
6402 static enum fan_status_access_mode fan_status_access_mode;
6403 static enum fan_control_access_mode fan_control_access_mode;
6404 static enum fan_control_commands fan_control_commands;
6405
6406 static u8 fan_control_initial_status;
6407 static u8 fan_control_desired_level;
6408 static u8 fan_control_resume_level;
6409 static int fan_watchdog_maxinterval;
6410
6411 static struct mutex fan_mutex;
6412
6413 static void fan_watchdog_fire(struct work_struct *ignored);
6414 static DECLARE_DELAYED_WORK(fan_watchdog_task, fan_watchdog_fire);
6415
6416 TPACPI_HANDLE(fans, ec, "FANS"); /* X31, X40, X41 */
6417 TPACPI_HANDLE(gfan, ec, "GFAN", /* 570 */
6418 "\\FSPD", /* 600e/x, 770e, 770x */
6419 ); /* all others */
6420 TPACPI_HANDLE(sfan, ec, "SFAN", /* 570 */
6421 "JFNS", /* 770x-JL */
6422 ); /* all others */
6423
6424 /*
6425 * Unitialized HFSP quirk: ACPI DSDT and EC fail to initialize the
6426 * HFSP register at boot, so it contains 0x07 but the Thinkpad could
6427 * be in auto mode (0x80).
6428 *
6429 * This is corrected by any write to HFSP either by the driver, or
6430 * by the firmware.
6431 *
6432 * We assume 0x07 really means auto mode while this quirk is active,
6433 * as this is far more likely than the ThinkPad being in level 7,
6434 * which is only used by the firmware during thermal emergencies.
6435 *
6436 * Enable for TP-1Y (T43), TP-78 (R51e), TP-76 (R52),
6437 * TP-70 (T43, R52), which are known to be buggy.
6438 */
6439
6440 static void fan_quirk1_setup(void)
6441 {
6442 if (fan_control_initial_status == 0x07) {
6443 printk(TPACPI_NOTICE
6444 "fan_init: initial fan status is unknown, "
6445 "assuming it is in auto mode\n");
6446 tp_features.fan_ctrl_status_undef = 1;
6447 }
6448 }
6449
6450 static void fan_quirk1_handle(u8 *fan_status)
6451 {
6452 if (unlikely(tp_features.fan_ctrl_status_undef)) {
6453 if (*fan_status != fan_control_initial_status) {
6454 /* something changed the HFSP regisnter since
6455 * driver init time, so it is not undefined
6456 * anymore */
6457 tp_features.fan_ctrl_status_undef = 0;
6458 } else {
6459 /* Return most likely status. In fact, it
6460 * might be the only possible status */
6461 *fan_status = TP_EC_FAN_AUTO;
6462 }
6463 }
6464 }
6465
6466 /* Select main fan on X60/X61, NOOP on others */
6467 static bool fan_select_fan1(void)
6468 {
6469 if (tp_features.second_fan) {
6470 u8 val;
6471
6472 if (ec_read(fan_select_offset, &val) < 0)
6473 return false;
6474 val &= 0xFEU;
6475 if (ec_write(fan_select_offset, val) < 0)
6476 return false;
6477 }
6478 return true;
6479 }
6480
6481 /* Select secondary fan on X60/X61 */
6482 static bool fan_select_fan2(void)
6483 {
6484 u8 val;
6485
6486 if (!tp_features.second_fan)
6487 return false;
6488
6489 if (ec_read(fan_select_offset, &val) < 0)
6490 return false;
6491 val |= 0x01U;
6492 if (ec_write(fan_select_offset, val) < 0)
6493 return false;
6494
6495 return true;
6496 }
6497
6498 /*
6499 * Call with fan_mutex held
6500 */
6501 static void fan_update_desired_level(u8 status)
6502 {
6503 if ((status &
6504 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
6505 if (status > 7)
6506 fan_control_desired_level = 7;
6507 else
6508 fan_control_desired_level = status;
6509 }
6510 }
6511
6512 static int fan_get_status(u8 *status)
6513 {
6514 u8 s;
6515
6516 /* TODO:
6517 * Add TPACPI_FAN_RD_ACPI_FANS ? */
6518
6519 switch (fan_status_access_mode) {
6520 case TPACPI_FAN_RD_ACPI_GFAN:
6521 /* 570, 600e/x, 770e, 770x */
6522
6523 if (unlikely(!acpi_evalf(gfan_handle, &s, NULL, "d")))
6524 return -EIO;
6525
6526 if (likely(status))
6527 *status = s & 0x07;
6528
6529 break;
6530
6531 case TPACPI_FAN_RD_TPEC:
6532 /* all except 570, 600e/x, 770e, 770x */
6533 if (unlikely(!acpi_ec_read(fan_status_offset, &s)))
6534 return -EIO;
6535
6536 if (likely(status)) {
6537 *status = s;
6538 fan_quirk1_handle(status);
6539 }
6540
6541 break;
6542
6543 default:
6544 return -ENXIO;
6545 }
6546
6547 return 0;
6548 }
6549
6550 static int fan_get_status_safe(u8 *status)
6551 {
6552 int rc;
6553 u8 s;
6554
6555 if (mutex_lock_killable(&fan_mutex))
6556 return -ERESTARTSYS;
6557 rc = fan_get_status(&s);
6558 if (!rc)
6559 fan_update_desired_level(s);
6560 mutex_unlock(&fan_mutex);
6561
6562 if (status)
6563 *status = s;
6564
6565 return rc;
6566 }
6567
6568 static int fan_get_speed(unsigned int *speed)
6569 {
6570 u8 hi, lo;
6571
6572 switch (fan_status_access_mode) {
6573 case TPACPI_FAN_RD_TPEC:
6574 /* all except 570, 600e/x, 770e, 770x */
6575 if (unlikely(!fan_select_fan1()))
6576 return -EIO;
6577 if (unlikely(!acpi_ec_read(fan_rpm_offset, &lo) ||
6578 !acpi_ec_read(fan_rpm_offset + 1, &hi)))
6579 return -EIO;
6580
6581 if (likely(speed))
6582 *speed = (hi << 8) | lo;
6583
6584 break;
6585
6586 default:
6587 return -ENXIO;
6588 }
6589
6590 return 0;
6591 }
6592
6593 static int fan2_get_speed(unsigned int *speed)
6594 {
6595 u8 hi, lo;
6596 bool rc;
6597
6598 switch (fan_status_access_mode) {
6599 case TPACPI_FAN_RD_TPEC:
6600 /* all except 570, 600e/x, 770e, 770x */
6601 if (unlikely(!fan_select_fan2()))
6602 return -EIO;
6603 rc = !acpi_ec_read(fan_rpm_offset, &lo) ||
6604 !acpi_ec_read(fan_rpm_offset + 1, &hi);
6605 fan_select_fan1(); /* play it safe */
6606 if (rc)
6607 return -EIO;
6608
6609 if (likely(speed))
6610 *speed = (hi << 8) | lo;
6611
6612 break;
6613
6614 default:
6615 return -ENXIO;
6616 }
6617
6618 return 0;
6619 }
6620
6621 static int fan_set_level(int level)
6622 {
6623 if (!fan_control_allowed)
6624 return -EPERM;
6625
6626 switch (fan_control_access_mode) {
6627 case TPACPI_FAN_WR_ACPI_SFAN:
6628 if (level >= 0 && level <= 7) {
6629 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", level))
6630 return -EIO;
6631 } else
6632 return -EINVAL;
6633 break;
6634
6635 case TPACPI_FAN_WR_ACPI_FANS:
6636 case TPACPI_FAN_WR_TPEC:
6637 if (!(level & TP_EC_FAN_AUTO) &&
6638 !(level & TP_EC_FAN_FULLSPEED) &&
6639 ((level < 0) || (level > 7)))
6640 return -EINVAL;
6641
6642 /* safety net should the EC not support AUTO
6643 * or FULLSPEED mode bits and just ignore them */
6644 if (level & TP_EC_FAN_FULLSPEED)
6645 level |= 7; /* safety min speed 7 */
6646 else if (level & TP_EC_FAN_AUTO)
6647 level |= 4; /* safety min speed 4 */
6648
6649 if (!acpi_ec_write(fan_status_offset, level))
6650 return -EIO;
6651 else
6652 tp_features.fan_ctrl_status_undef = 0;
6653 break;
6654
6655 default:
6656 return -ENXIO;
6657 }
6658
6659 vdbg_printk(TPACPI_DBG_FAN,
6660 "fan control: set fan control register to 0x%02x\n", level);
6661 return 0;
6662 }
6663
6664 static int fan_set_level_safe(int level)
6665 {
6666 int rc;
6667
6668 if (!fan_control_allowed)
6669 return -EPERM;
6670
6671 if (mutex_lock_killable(&fan_mutex))
6672 return -ERESTARTSYS;
6673
6674 if (level == TPACPI_FAN_LAST_LEVEL)
6675 level = fan_control_desired_level;
6676
6677 rc = fan_set_level(level);
6678 if (!rc)
6679 fan_update_desired_level(level);
6680
6681 mutex_unlock(&fan_mutex);
6682 return rc;
6683 }
6684
6685 static int fan_set_enable(void)
6686 {
6687 u8 s;
6688 int rc;
6689
6690 if (!fan_control_allowed)
6691 return -EPERM;
6692
6693 if (mutex_lock_killable(&fan_mutex))
6694 return -ERESTARTSYS;
6695
6696 switch (fan_control_access_mode) {
6697 case TPACPI_FAN_WR_ACPI_FANS:
6698 case TPACPI_FAN_WR_TPEC:
6699 rc = fan_get_status(&s);
6700 if (rc < 0)
6701 break;
6702
6703 /* Don't go out of emergency fan mode */
6704 if (s != 7) {
6705 s &= 0x07;
6706 s |= TP_EC_FAN_AUTO | 4; /* min fan speed 4 */
6707 }
6708
6709 if (!acpi_ec_write(fan_status_offset, s))
6710 rc = -EIO;
6711 else {
6712 tp_features.fan_ctrl_status_undef = 0;
6713 rc = 0;
6714 }
6715 break;
6716
6717 case TPACPI_FAN_WR_ACPI_SFAN:
6718 rc = fan_get_status(&s);
6719 if (rc < 0)
6720 break;
6721
6722 s &= 0x07;
6723
6724 /* Set fan to at least level 4 */
6725 s |= 4;
6726
6727 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", s))
6728 rc = -EIO;
6729 else
6730 rc = 0;
6731 break;
6732
6733 default:
6734 rc = -ENXIO;
6735 }
6736
6737 mutex_unlock(&fan_mutex);
6738
6739 if (!rc)
6740 vdbg_printk(TPACPI_DBG_FAN,
6741 "fan control: set fan control register to 0x%02x\n",
6742 s);
6743 return rc;
6744 }
6745
6746 static int fan_set_disable(void)
6747 {
6748 int rc;
6749
6750 if (!fan_control_allowed)
6751 return -EPERM;
6752
6753 if (mutex_lock_killable(&fan_mutex))
6754 return -ERESTARTSYS;
6755
6756 rc = 0;
6757 switch (fan_control_access_mode) {
6758 case TPACPI_FAN_WR_ACPI_FANS:
6759 case TPACPI_FAN_WR_TPEC:
6760 if (!acpi_ec_write(fan_status_offset, 0x00))
6761 rc = -EIO;
6762 else {
6763 fan_control_desired_level = 0;
6764 tp_features.fan_ctrl_status_undef = 0;
6765 }
6766 break;
6767
6768 case TPACPI_FAN_WR_ACPI_SFAN:
6769 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", 0x00))
6770 rc = -EIO;
6771 else
6772 fan_control_desired_level = 0;
6773 break;
6774
6775 default:
6776 rc = -ENXIO;
6777 }
6778
6779 if (!rc)
6780 vdbg_printk(TPACPI_DBG_FAN,
6781 "fan control: set fan control register to 0\n");
6782
6783 mutex_unlock(&fan_mutex);
6784 return rc;
6785 }
6786
6787 static int fan_set_speed(int speed)
6788 {
6789 int rc;
6790
6791 if (!fan_control_allowed)
6792 return -EPERM;
6793
6794 if (mutex_lock_killable(&fan_mutex))
6795 return -ERESTARTSYS;
6796
6797 rc = 0;
6798 switch (fan_control_access_mode) {
6799 case TPACPI_FAN_WR_ACPI_FANS:
6800 if (speed >= 0 && speed <= 65535) {
6801 if (!acpi_evalf(fans_handle, NULL, NULL, "vddd",
6802 speed, speed, speed))
6803 rc = -EIO;
6804 } else
6805 rc = -EINVAL;
6806 break;
6807
6808 default:
6809 rc = -ENXIO;
6810 }
6811
6812 mutex_unlock(&fan_mutex);
6813 return rc;
6814 }
6815
6816 static void fan_watchdog_reset(void)
6817 {
6818 static int fan_watchdog_active;
6819
6820 if (fan_control_access_mode == TPACPI_FAN_WR_NONE)
6821 return;
6822
6823 if (fan_watchdog_active)
6824 cancel_delayed_work(&fan_watchdog_task);
6825
6826 if (fan_watchdog_maxinterval > 0 &&
6827 tpacpi_lifecycle != TPACPI_LIFE_EXITING) {
6828 fan_watchdog_active = 1;
6829 if (!queue_delayed_work(tpacpi_wq, &fan_watchdog_task,
6830 msecs_to_jiffies(fan_watchdog_maxinterval
6831 * 1000))) {
6832 printk(TPACPI_ERR
6833 "failed to queue the fan watchdog, "
6834 "watchdog will not trigger\n");
6835 }
6836 } else
6837 fan_watchdog_active = 0;
6838 }
6839
6840 static void fan_watchdog_fire(struct work_struct *ignored)
6841 {
6842 int rc;
6843
6844 if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
6845 return;
6846
6847 printk(TPACPI_NOTICE "fan watchdog: enabling fan\n");
6848 rc = fan_set_enable();
6849 if (rc < 0) {
6850 printk(TPACPI_ERR "fan watchdog: error %d while enabling fan, "
6851 "will try again later...\n", -rc);
6852 /* reschedule for later */
6853 fan_watchdog_reset();
6854 }
6855 }
6856
6857 /*
6858 * SYSFS fan layout: hwmon compatible (device)
6859 *
6860 * pwm*_enable:
6861 * 0: "disengaged" mode
6862 * 1: manual mode
6863 * 2: native EC "auto" mode (recommended, hardware default)
6864 *
6865 * pwm*: set speed in manual mode, ignored otherwise.
6866 * 0 is level 0; 255 is level 7. Intermediate points done with linear
6867 * interpolation.
6868 *
6869 * fan*_input: tachometer reading, RPM
6870 *
6871 *
6872 * SYSFS fan layout: extensions
6873 *
6874 * fan_watchdog (driver):
6875 * fan watchdog interval in seconds, 0 disables (default), max 120
6876 */
6877
6878 /* sysfs fan pwm1_enable ----------------------------------------------- */
6879 static ssize_t fan_pwm1_enable_show(struct device *dev,
6880 struct device_attribute *attr,
6881 char *buf)
6882 {
6883 int res, mode;
6884 u8 status;
6885
6886 res = fan_get_status_safe(&status);
6887 if (res)
6888 return res;
6889
6890 if (status & TP_EC_FAN_FULLSPEED) {
6891 mode = 0;
6892 } else if (status & TP_EC_FAN_AUTO) {
6893 mode = 2;
6894 } else
6895 mode = 1;
6896
6897 return snprintf(buf, PAGE_SIZE, "%d\n", mode);
6898 }
6899
6900 static ssize_t fan_pwm1_enable_store(struct device *dev,
6901 struct device_attribute *attr,
6902 const char *buf, size_t count)
6903 {
6904 unsigned long t;
6905 int res, level;
6906
6907 if (parse_strtoul(buf, 2, &t))
6908 return -EINVAL;
6909
6910 tpacpi_disclose_usertask("hwmon pwm1_enable",
6911 "set fan mode to %lu\n", t);
6912
6913 switch (t) {
6914 case 0:
6915 level = TP_EC_FAN_FULLSPEED;
6916 break;
6917 case 1:
6918 level = TPACPI_FAN_LAST_LEVEL;
6919 break;
6920 case 2:
6921 level = TP_EC_FAN_AUTO;
6922 break;
6923 case 3:
6924 /* reserved for software-controlled auto mode */
6925 return -ENOSYS;
6926 default:
6927 return -EINVAL;
6928 }
6929
6930 res = fan_set_level_safe(level);
6931 if (res == -ENXIO)
6932 return -EINVAL;
6933 else if (res < 0)
6934 return res;
6935
6936 fan_watchdog_reset();
6937
6938 return count;
6939 }
6940
6941 static struct device_attribute dev_attr_fan_pwm1_enable =
6942 __ATTR(pwm1_enable, S_IWUSR | S_IRUGO,
6943 fan_pwm1_enable_show, fan_pwm1_enable_store);
6944
6945 /* sysfs fan pwm1 ------------------------------------------------------ */
6946 static ssize_t fan_pwm1_show(struct device *dev,
6947 struct device_attribute *attr,
6948 char *buf)
6949 {
6950 int res;
6951 u8 status;
6952
6953 res = fan_get_status_safe(&status);
6954 if (res)
6955 return res;
6956
6957 if ((status &
6958 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) != 0)
6959 status = fan_control_desired_level;
6960
6961 if (status > 7)
6962 status = 7;
6963
6964 return snprintf(buf, PAGE_SIZE, "%u\n", (status * 255) / 7);
6965 }
6966
6967 static ssize_t fan_pwm1_store(struct device *dev,
6968 struct device_attribute *attr,
6969 const char *buf, size_t count)
6970 {
6971 unsigned long s;
6972 int rc;
6973 u8 status, newlevel;
6974
6975 if (parse_strtoul(buf, 255, &s))
6976 return -EINVAL;
6977
6978 tpacpi_disclose_usertask("hwmon pwm1",
6979 "set fan speed to %lu\n", s);
6980
6981 /* scale down from 0-255 to 0-7 */
6982 newlevel = (s >> 5) & 0x07;
6983
6984 if (mutex_lock_killable(&fan_mutex))
6985 return -ERESTARTSYS;
6986
6987 rc = fan_get_status(&status);
6988 if (!rc && (status &
6989 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
6990 rc = fan_set_level(newlevel);
6991 if (rc == -ENXIO)
6992 rc = -EINVAL;
6993 else if (!rc) {
6994 fan_update_desired_level(newlevel);
6995 fan_watchdog_reset();
6996 }
6997 }
6998
6999 mutex_unlock(&fan_mutex);
7000 return (rc)? rc : count;
7001 }
7002
7003 static struct device_attribute dev_attr_fan_pwm1 =
7004 __ATTR(pwm1, S_IWUSR | S_IRUGO,
7005 fan_pwm1_show, fan_pwm1_store);
7006
7007 /* sysfs fan fan1_input ------------------------------------------------ */
7008 static ssize_t fan_fan1_input_show(struct device *dev,
7009 struct device_attribute *attr,
7010 char *buf)
7011 {
7012 int res;
7013 unsigned int speed;
7014
7015 res = fan_get_speed(&speed);
7016 if (res < 0)
7017 return res;
7018
7019 return snprintf(buf, PAGE_SIZE, "%u\n", speed);
7020 }
7021
7022 static struct device_attribute dev_attr_fan_fan1_input =
7023 __ATTR(fan1_input, S_IRUGO,
7024 fan_fan1_input_show, NULL);
7025
7026 /* sysfs fan fan2_input ------------------------------------------------ */
7027 static ssize_t fan_fan2_input_show(struct device *dev,
7028 struct device_attribute *attr,
7029 char *buf)
7030 {
7031 int res;
7032 unsigned int speed;
7033
7034 res = fan2_get_speed(&speed);
7035 if (res < 0)
7036 return res;
7037
7038 return snprintf(buf, PAGE_SIZE, "%u\n", speed);
7039 }
7040
7041 static struct device_attribute dev_attr_fan_fan2_input =
7042 __ATTR(fan2_input, S_IRUGO,
7043 fan_fan2_input_show, NULL);
7044
7045 /* sysfs fan fan_watchdog (hwmon driver) ------------------------------- */
7046 static ssize_t fan_fan_watchdog_show(struct device_driver *drv,
7047 char *buf)
7048 {
7049 return snprintf(buf, PAGE_SIZE, "%u\n", fan_watchdog_maxinterval);
7050 }
7051
7052 static ssize_t fan_fan_watchdog_store(struct device_driver *drv,
7053 const char *buf, size_t count)
7054 {
7055 unsigned long t;
7056
7057 if (parse_strtoul(buf, 120, &t))
7058 return -EINVAL;
7059
7060 if (!fan_control_allowed)
7061 return -EPERM;
7062
7063 fan_watchdog_maxinterval = t;
7064 fan_watchdog_reset();
7065
7066 tpacpi_disclose_usertask("fan_watchdog", "set to %lu\n", t);
7067
7068 return count;
7069 }
7070
7071 static DRIVER_ATTR(fan_watchdog, S_IWUSR | S_IRUGO,
7072 fan_fan_watchdog_show, fan_fan_watchdog_store);
7073
7074 /* --------------------------------------------------------------------- */
7075 static struct attribute *fan_attributes[] = {
7076 &dev_attr_fan_pwm1_enable.attr, &dev_attr_fan_pwm1.attr,
7077 &dev_attr_fan_fan1_input.attr,
7078 NULL, /* for fan2_input */
7079 NULL
7080 };
7081
7082 static const struct attribute_group fan_attr_group = {
7083 .attrs = fan_attributes,
7084 };
7085
7086 #define TPACPI_FAN_Q1 0x0001 /* Unitialized HFSP */
7087 #define TPACPI_FAN_2FAN 0x0002 /* EC 0x31 bit 0 selects fan2 */
7088
7089 #define TPACPI_FAN_QI(__id1, __id2, __quirks) \
7090 { .vendor = PCI_VENDOR_ID_IBM, \
7091 .bios = TPACPI_MATCH_ANY, \
7092 .ec = TPID(__id1, __id2), \
7093 .quirks = __quirks }
7094
7095 #define TPACPI_FAN_QL(__id1, __id2, __quirks) \
7096 { .vendor = PCI_VENDOR_ID_LENOVO, \
7097 .bios = TPACPI_MATCH_ANY, \
7098 .ec = TPID(__id1, __id2), \
7099 .quirks = __quirks }
7100
7101 static const struct tpacpi_quirk fan_quirk_table[] __initconst = {
7102 TPACPI_FAN_QI('1', 'Y', TPACPI_FAN_Q1),
7103 TPACPI_FAN_QI('7', '8', TPACPI_FAN_Q1),
7104 TPACPI_FAN_QI('7', '6', TPACPI_FAN_Q1),
7105 TPACPI_FAN_QI('7', '0', TPACPI_FAN_Q1),
7106 TPACPI_FAN_QL('7', 'M', TPACPI_FAN_2FAN),
7107 };
7108
7109 #undef TPACPI_FAN_QL
7110 #undef TPACPI_FAN_QI
7111
7112 static int __init fan_init(struct ibm_init_struct *iibm)
7113 {
7114 int rc;
7115 unsigned long quirks;
7116
7117 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
7118 "initializing fan subdriver\n");
7119
7120 mutex_init(&fan_mutex);
7121 fan_status_access_mode = TPACPI_FAN_NONE;
7122 fan_control_access_mode = TPACPI_FAN_WR_NONE;
7123 fan_control_commands = 0;
7124 fan_watchdog_maxinterval = 0;
7125 tp_features.fan_ctrl_status_undef = 0;
7126 tp_features.second_fan = 0;
7127 fan_control_desired_level = 7;
7128
7129 TPACPI_ACPIHANDLE_INIT(fans);
7130 TPACPI_ACPIHANDLE_INIT(gfan);
7131 TPACPI_ACPIHANDLE_INIT(sfan);
7132
7133 quirks = tpacpi_check_quirks(fan_quirk_table,
7134 ARRAY_SIZE(fan_quirk_table));
7135
7136 if (gfan_handle) {
7137 /* 570, 600e/x, 770e, 770x */
7138 fan_status_access_mode = TPACPI_FAN_RD_ACPI_GFAN;
7139 } else {
7140 /* all other ThinkPads: note that even old-style
7141 * ThinkPad ECs supports the fan control register */
7142 if (likely(acpi_ec_read(fan_status_offset,
7143 &fan_control_initial_status))) {
7144 fan_status_access_mode = TPACPI_FAN_RD_TPEC;
7145 if (quirks & TPACPI_FAN_Q1)
7146 fan_quirk1_setup();
7147 if (quirks & TPACPI_FAN_2FAN) {
7148 tp_features.second_fan = 1;
7149 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
7150 "secondary fan support enabled\n");
7151 }
7152 } else {
7153 printk(TPACPI_ERR
7154 "ThinkPad ACPI EC access misbehaving, "
7155 "fan status and control unavailable\n");
7156 return 1;
7157 }
7158 }
7159
7160 if (sfan_handle) {
7161 /* 570, 770x-JL */
7162 fan_control_access_mode = TPACPI_FAN_WR_ACPI_SFAN;
7163 fan_control_commands |=
7164 TPACPI_FAN_CMD_LEVEL | TPACPI_FAN_CMD_ENABLE;
7165 } else {
7166 if (!gfan_handle) {
7167 /* gfan without sfan means no fan control */
7168 /* all other models implement TP EC 0x2f control */
7169
7170 if (fans_handle) {
7171 /* X31, X40, X41 */
7172 fan_control_access_mode =
7173 TPACPI_FAN_WR_ACPI_FANS;
7174 fan_control_commands |=
7175 TPACPI_FAN_CMD_SPEED |
7176 TPACPI_FAN_CMD_LEVEL |
7177 TPACPI_FAN_CMD_ENABLE;
7178 } else {
7179 fan_control_access_mode = TPACPI_FAN_WR_TPEC;
7180 fan_control_commands |=
7181 TPACPI_FAN_CMD_LEVEL |
7182 TPACPI_FAN_CMD_ENABLE;
7183 }
7184 }
7185 }
7186
7187 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
7188 "fan is %s, modes %d, %d\n",
7189 str_supported(fan_status_access_mode != TPACPI_FAN_NONE ||
7190 fan_control_access_mode != TPACPI_FAN_WR_NONE),
7191 fan_status_access_mode, fan_control_access_mode);
7192
7193 /* fan control master switch */
7194 if (!fan_control_allowed) {
7195 fan_control_access_mode = TPACPI_FAN_WR_NONE;
7196 fan_control_commands = 0;
7197 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
7198 "fan control features disabled by parameter\n");
7199 }
7200
7201 /* update fan_control_desired_level */
7202 if (fan_status_access_mode != TPACPI_FAN_NONE)
7203 fan_get_status_safe(NULL);
7204
7205 if (fan_status_access_mode != TPACPI_FAN_NONE ||
7206 fan_control_access_mode != TPACPI_FAN_WR_NONE) {
7207 if (tp_features.second_fan) {
7208 /* attach second fan tachometer */
7209 fan_attributes[ARRAY_SIZE(fan_attributes)-2] =
7210 &dev_attr_fan_fan2_input.attr;
7211 }
7212 rc = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
7213 &fan_attr_group);
7214 if (rc < 0)
7215 return rc;
7216
7217 rc = driver_create_file(&tpacpi_hwmon_pdriver.driver,
7218 &driver_attr_fan_watchdog);
7219 if (rc < 0) {
7220 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
7221 &fan_attr_group);
7222 return rc;
7223 }
7224 return 0;
7225 } else
7226 return 1;
7227 }
7228
7229 static void fan_exit(void)
7230 {
7231 vdbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_FAN,
7232 "cancelling any pending fan watchdog tasks\n");
7233
7234 /* FIXME: can we really do this unconditionally? */
7235 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj, &fan_attr_group);
7236 driver_remove_file(&tpacpi_hwmon_pdriver.driver,
7237 &driver_attr_fan_watchdog);
7238
7239 cancel_delayed_work(&fan_watchdog_task);
7240 flush_workqueue(tpacpi_wq);
7241 }
7242
7243 static void fan_suspend(pm_message_t state)
7244 {
7245 int rc;
7246
7247 if (!fan_control_allowed)
7248 return;
7249
7250 /* Store fan status in cache */
7251 fan_control_resume_level = 0;
7252 rc = fan_get_status_safe(&fan_control_resume_level);
7253 if (rc < 0)
7254 printk(TPACPI_NOTICE
7255 "failed to read fan level for later "
7256 "restore during resume: %d\n", rc);
7257
7258 /* if it is undefined, don't attempt to restore it.
7259 * KEEP THIS LAST */
7260 if (tp_features.fan_ctrl_status_undef)
7261 fan_control_resume_level = 0;
7262 }
7263
7264 static void fan_resume(void)
7265 {
7266 u8 current_level = 7;
7267 bool do_set = false;
7268 int rc;
7269
7270 /* DSDT *always* updates status on resume */
7271 tp_features.fan_ctrl_status_undef = 0;
7272
7273 if (!fan_control_allowed ||
7274 !fan_control_resume_level ||
7275 (fan_get_status_safe(&current_level) < 0))
7276 return;
7277
7278 switch (fan_control_access_mode) {
7279 case TPACPI_FAN_WR_ACPI_SFAN:
7280 /* never decrease fan level */
7281 do_set = (fan_control_resume_level > current_level);
7282 break;
7283 case TPACPI_FAN_WR_ACPI_FANS:
7284 case TPACPI_FAN_WR_TPEC:
7285 /* never decrease fan level, scale is:
7286 * TP_EC_FAN_FULLSPEED > 7 >= TP_EC_FAN_AUTO
7287 *
7288 * We expect the firmware to set either 7 or AUTO, but we
7289 * handle FULLSPEED out of paranoia.
7290 *
7291 * So, we can safely only restore FULLSPEED or 7, anything
7292 * else could slow the fan. Restoring AUTO is useless, at
7293 * best that's exactly what the DSDT already set (it is the
7294 * slower it uses).
7295 *
7296 * Always keep in mind that the DSDT *will* have set the
7297 * fans to what the vendor supposes is the best level. We
7298 * muck with it only to speed the fan up.
7299 */
7300 if (fan_control_resume_level != 7 &&
7301 !(fan_control_resume_level & TP_EC_FAN_FULLSPEED))
7302 return;
7303 else
7304 do_set = !(current_level & TP_EC_FAN_FULLSPEED) &&
7305 (current_level != fan_control_resume_level);
7306 break;
7307 default:
7308 return;
7309 }
7310 if (do_set) {
7311 printk(TPACPI_NOTICE
7312 "restoring fan level to 0x%02x\n",
7313 fan_control_resume_level);
7314 rc = fan_set_level_safe(fan_control_resume_level);
7315 if (rc < 0)
7316 printk(TPACPI_NOTICE
7317 "failed to restore fan level: %d\n", rc);
7318 }
7319 }
7320
7321 static int fan_read(char *p)
7322 {
7323 int len = 0;
7324 int rc;
7325 u8 status;
7326 unsigned int speed = 0;
7327
7328 switch (fan_status_access_mode) {
7329 case TPACPI_FAN_RD_ACPI_GFAN:
7330 /* 570, 600e/x, 770e, 770x */
7331 rc = fan_get_status_safe(&status);
7332 if (rc < 0)
7333 return rc;
7334
7335 len += sprintf(p + len, "status:\t\t%s\n"
7336 "level:\t\t%d\n",
7337 (status != 0) ? "enabled" : "disabled", status);
7338 break;
7339
7340 case TPACPI_FAN_RD_TPEC:
7341 /* all except 570, 600e/x, 770e, 770x */
7342 rc = fan_get_status_safe(&status);
7343 if (rc < 0)
7344 return rc;
7345
7346 len += sprintf(p + len, "status:\t\t%s\n",
7347 (status != 0) ? "enabled" : "disabled");
7348
7349 rc = fan_get_speed(&speed);
7350 if (rc < 0)
7351 return rc;
7352
7353 len += sprintf(p + len, "speed:\t\t%d\n", speed);
7354
7355 if (status & TP_EC_FAN_FULLSPEED)
7356 /* Disengaged mode takes precedence */
7357 len += sprintf(p + len, "level:\t\tdisengaged\n");
7358 else if (status & TP_EC_FAN_AUTO)
7359 len += sprintf(p + len, "level:\t\tauto\n");
7360 else
7361 len += sprintf(p + len, "level:\t\t%d\n", status);
7362 break;
7363
7364 case TPACPI_FAN_NONE:
7365 default:
7366 len += sprintf(p + len, "status:\t\tnot supported\n");
7367 }
7368
7369 if (fan_control_commands & TPACPI_FAN_CMD_LEVEL) {
7370 len += sprintf(p + len, "commands:\tlevel <level>");
7371
7372 switch (fan_control_access_mode) {
7373 case TPACPI_FAN_WR_ACPI_SFAN:
7374 len += sprintf(p + len, " (<level> is 0-7)\n");
7375 break;
7376
7377 default:
7378 len += sprintf(p + len, " (<level> is 0-7, "
7379 "auto, disengaged, full-speed)\n");
7380 break;
7381 }
7382 }
7383
7384 if (fan_control_commands & TPACPI_FAN_CMD_ENABLE)
7385 len += sprintf(p + len, "commands:\tenable, disable\n"
7386 "commands:\twatchdog <timeout> (<timeout> "
7387 "is 0 (off), 1-120 (seconds))\n");
7388
7389 if (fan_control_commands & TPACPI_FAN_CMD_SPEED)
7390 len += sprintf(p + len, "commands:\tspeed <speed>"
7391 " (<speed> is 0-65535)\n");
7392
7393 return len;
7394 }
7395
7396 static int fan_write_cmd_level(const char *cmd, int *rc)
7397 {
7398 int level;
7399
7400 if (strlencmp(cmd, "level auto") == 0)
7401 level = TP_EC_FAN_AUTO;
7402 else if ((strlencmp(cmd, "level disengaged") == 0) |
7403 (strlencmp(cmd, "level full-speed") == 0))
7404 level = TP_EC_FAN_FULLSPEED;
7405 else if (sscanf(cmd, "level %d", &level) != 1)
7406 return 0;
7407
7408 *rc = fan_set_level_safe(level);
7409 if (*rc == -ENXIO)
7410 printk(TPACPI_ERR "level command accepted for unsupported "
7411 "access mode %d", fan_control_access_mode);
7412 else if (!*rc)
7413 tpacpi_disclose_usertask("procfs fan",
7414 "set level to %d\n", level);
7415
7416 return 1;
7417 }
7418
7419 static int fan_write_cmd_enable(const char *cmd, int *rc)
7420 {
7421 if (strlencmp(cmd, "enable") != 0)
7422 return 0;
7423
7424 *rc = fan_set_enable();
7425 if (*rc == -ENXIO)
7426 printk(TPACPI_ERR "enable command accepted for unsupported "
7427 "access mode %d", fan_control_access_mode);
7428 else if (!*rc)
7429 tpacpi_disclose_usertask("procfs fan", "enable\n");
7430
7431 return 1;
7432 }
7433
7434 static int fan_write_cmd_disable(const char *cmd, int *rc)
7435 {
7436 if (strlencmp(cmd, "disable") != 0)
7437 return 0;
7438
7439 *rc = fan_set_disable();
7440 if (*rc == -ENXIO)
7441 printk(TPACPI_ERR "disable command accepted for unsupported "
7442 "access mode %d", fan_control_access_mode);
7443 else if (!*rc)
7444 tpacpi_disclose_usertask("procfs fan", "disable\n");
7445
7446 return 1;
7447 }
7448
7449 static int fan_write_cmd_speed(const char *cmd, int *rc)
7450 {
7451 int speed;
7452
7453 /* TODO:
7454 * Support speed <low> <medium> <high> ? */
7455
7456 if (sscanf(cmd, "speed %d", &speed) != 1)
7457 return 0;
7458
7459 *rc = fan_set_speed(speed);
7460 if (*rc == -ENXIO)
7461 printk(TPACPI_ERR "speed command accepted for unsupported "
7462 "access mode %d", fan_control_access_mode);
7463 else if (!*rc)
7464 tpacpi_disclose_usertask("procfs fan",
7465 "set speed to %d\n", speed);
7466
7467 return 1;
7468 }
7469
7470 static int fan_write_cmd_watchdog(const char *cmd, int *rc)
7471 {
7472 int interval;
7473
7474 if (sscanf(cmd, "watchdog %d", &interval) != 1)
7475 return 0;
7476
7477 if (interval < 0 || interval > 120)
7478 *rc = -EINVAL;
7479 else {
7480 fan_watchdog_maxinterval = interval;
7481 tpacpi_disclose_usertask("procfs fan",
7482 "set watchdog timer to %d\n",
7483 interval);
7484 }
7485
7486 return 1;
7487 }
7488
7489 static int fan_write(char *buf)
7490 {
7491 char *cmd;
7492 int rc = 0;
7493
7494 while (!rc && (cmd = next_cmd(&buf))) {
7495 if (!((fan_control_commands & TPACPI_FAN_CMD_LEVEL) &&
7496 fan_write_cmd_level(cmd, &rc)) &&
7497 !((fan_control_commands & TPACPI_FAN_CMD_ENABLE) &&
7498 (fan_write_cmd_enable(cmd, &rc) ||
7499 fan_write_cmd_disable(cmd, &rc) ||
7500 fan_write_cmd_watchdog(cmd, &rc))) &&
7501 !((fan_control_commands & TPACPI_FAN_CMD_SPEED) &&
7502 fan_write_cmd_speed(cmd, &rc))
7503 )
7504 rc = -EINVAL;
7505 else if (!rc)
7506 fan_watchdog_reset();
7507 }
7508
7509 return rc;
7510 }
7511
7512 static struct ibm_struct fan_driver_data = {
7513 .name = "fan",
7514 .read = fan_read,
7515 .write = fan_write,
7516 .exit = fan_exit,
7517 .suspend = fan_suspend,
7518 .resume = fan_resume,
7519 };
7520
7521 /****************************************************************************
7522 ****************************************************************************
7523 *
7524 * Infrastructure
7525 *
7526 ****************************************************************************
7527 ****************************************************************************/
7528
7529 /* sysfs name ---------------------------------------------------------- */
7530 static ssize_t thinkpad_acpi_pdev_name_show(struct device *dev,
7531 struct device_attribute *attr,
7532 char *buf)
7533 {
7534 return snprintf(buf, PAGE_SIZE, "%s\n", TPACPI_NAME);
7535 }
7536
7537 static struct device_attribute dev_attr_thinkpad_acpi_pdev_name =
7538 __ATTR(name, S_IRUGO, thinkpad_acpi_pdev_name_show, NULL);
7539
7540 /* --------------------------------------------------------------------- */
7541
7542 /* /proc support */
7543 static struct proc_dir_entry *proc_dir;
7544
7545 /*
7546 * Module and infrastructure proble, init and exit handling
7547 */
7548
7549 static int force_load;
7550
7551 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
7552 static const char * __init str_supported(int is_supported)
7553 {
7554 static char text_unsupported[] __initdata = "not supported";
7555
7556 return (is_supported)? &text_unsupported[4] : &text_unsupported[0];
7557 }
7558 #endif /* CONFIG_THINKPAD_ACPI_DEBUG */
7559
7560 static void ibm_exit(struct ibm_struct *ibm)
7561 {
7562 dbg_printk(TPACPI_DBG_EXIT, "removing %s\n", ibm->name);
7563
7564 list_del_init(&ibm->all_drivers);
7565
7566 if (ibm->flags.acpi_notify_installed) {
7567 dbg_printk(TPACPI_DBG_EXIT,
7568 "%s: acpi_remove_notify_handler\n", ibm->name);
7569 BUG_ON(!ibm->acpi);
7570 acpi_remove_notify_handler(*ibm->acpi->handle,
7571 ibm->acpi->type,
7572 dispatch_acpi_notify);
7573 ibm->flags.acpi_notify_installed = 0;
7574 ibm->flags.acpi_notify_installed = 0;
7575 }
7576
7577 if (ibm->flags.proc_created) {
7578 dbg_printk(TPACPI_DBG_EXIT,
7579 "%s: remove_proc_entry\n", ibm->name);
7580 remove_proc_entry(ibm->name, proc_dir);
7581 ibm->flags.proc_created = 0;
7582 }
7583
7584 if (ibm->flags.acpi_driver_registered) {
7585 dbg_printk(TPACPI_DBG_EXIT,
7586 "%s: acpi_bus_unregister_driver\n", ibm->name);
7587 BUG_ON(!ibm->acpi);
7588 acpi_bus_unregister_driver(ibm->acpi->driver);
7589 kfree(ibm->acpi->driver);
7590 ibm->acpi->driver = NULL;
7591 ibm->flags.acpi_driver_registered = 0;
7592 }
7593
7594 if (ibm->flags.init_called && ibm->exit) {
7595 ibm->exit();
7596 ibm->flags.init_called = 0;
7597 }
7598
7599 dbg_printk(TPACPI_DBG_INIT, "finished removing %s\n", ibm->name);
7600 }
7601
7602 static int __init ibm_init(struct ibm_init_struct *iibm)
7603 {
7604 int ret;
7605 struct ibm_struct *ibm = iibm->data;
7606 struct proc_dir_entry *entry;
7607
7608 BUG_ON(ibm == NULL);
7609
7610 INIT_LIST_HEAD(&ibm->all_drivers);
7611
7612 if (ibm->flags.experimental && !experimental)
7613 return 0;
7614
7615 dbg_printk(TPACPI_DBG_INIT,
7616 "probing for %s\n", ibm->name);
7617
7618 if (iibm->init) {
7619 ret = iibm->init(iibm);
7620 if (ret > 0)
7621 return 0; /* probe failed */
7622 if (ret)
7623 return ret;
7624
7625 ibm->flags.init_called = 1;
7626 }
7627
7628 if (ibm->acpi) {
7629 if (ibm->acpi->hid) {
7630 ret = register_tpacpi_subdriver(ibm);
7631 if (ret)
7632 goto err_out;
7633 }
7634
7635 if (ibm->acpi->notify) {
7636 ret = setup_acpi_notify(ibm);
7637 if (ret == -ENODEV) {
7638 printk(TPACPI_NOTICE "disabling subdriver %s\n",
7639 ibm->name);
7640 ret = 0;
7641 goto err_out;
7642 }
7643 if (ret < 0)
7644 goto err_out;
7645 }
7646 }
7647
7648 dbg_printk(TPACPI_DBG_INIT,
7649 "%s installed\n", ibm->name);
7650
7651 if (ibm->read) {
7652 entry = create_proc_entry(ibm->name,
7653 S_IFREG | S_IRUGO | S_IWUSR,
7654 proc_dir);
7655 if (!entry) {
7656 printk(TPACPI_ERR "unable to create proc entry %s\n",
7657 ibm->name);
7658 ret = -ENODEV;
7659 goto err_out;
7660 }
7661 entry->data = ibm;
7662 entry->read_proc = &dispatch_procfs_read;
7663 if (ibm->write)
7664 entry->write_proc = &dispatch_procfs_write;
7665 ibm->flags.proc_created = 1;
7666 }
7667
7668 list_add_tail(&ibm->all_drivers, &tpacpi_all_drivers);
7669
7670 return 0;
7671
7672 err_out:
7673 dbg_printk(TPACPI_DBG_INIT,
7674 "%s: at error exit path with result %d\n",
7675 ibm->name, ret);
7676
7677 ibm_exit(ibm);
7678 return (ret < 0)? ret : 0;
7679 }
7680
7681 /* Probing */
7682
7683 static bool __pure __init tpacpi_is_fw_digit(const char c)
7684 {
7685 return (c >= '0' && c <= '9') || (c >= 'A' && c <= 'Z');
7686 }
7687
7688 /* Most models: xxyTkkWW (#.##c); Ancient 570/600 and -SL lacks (#.##c) */
7689 static bool __pure __init tpacpi_is_valid_fw_id(const char* const s,
7690 const char t)
7691 {
7692 return s && strlen(s) >= 8 &&
7693 tpacpi_is_fw_digit(s[0]) &&
7694 tpacpi_is_fw_digit(s[1]) &&
7695 s[2] == t && s[3] == 'T' &&
7696 tpacpi_is_fw_digit(s[4]) &&
7697 tpacpi_is_fw_digit(s[5]) &&
7698 s[6] == 'W' && s[7] == 'W';
7699 }
7700
7701 /* returns 0 - probe ok, or < 0 - probe error.
7702 * Probe ok doesn't mean thinkpad found.
7703 * On error, kfree() cleanup on tp->* is not performed, caller must do it */
7704 static int __must_check __init get_thinkpad_model_data(
7705 struct thinkpad_id_data *tp)
7706 {
7707 const struct dmi_device *dev = NULL;
7708 char ec_fw_string[18];
7709 char const *s;
7710
7711 if (!tp)
7712 return -EINVAL;
7713
7714 memset(tp, 0, sizeof(*tp));
7715
7716 if (dmi_name_in_vendors("IBM"))
7717 tp->vendor = PCI_VENDOR_ID_IBM;
7718 else if (dmi_name_in_vendors("LENOVO"))
7719 tp->vendor = PCI_VENDOR_ID_LENOVO;
7720 else
7721 return 0;
7722
7723 s = dmi_get_system_info(DMI_BIOS_VERSION);
7724 tp->bios_version_str = kstrdup(s, GFP_KERNEL);
7725 if (s && !tp->bios_version_str)
7726 return -ENOMEM;
7727
7728 /* Really ancient ThinkPad 240X will fail this, which is fine */
7729 if (!tpacpi_is_valid_fw_id(tp->bios_version_str, 'E'))
7730 return 0;
7731
7732 tp->bios_model = tp->bios_version_str[0]
7733 | (tp->bios_version_str[1] << 8);
7734 tp->bios_release = (tp->bios_version_str[4] << 8)
7735 | tp->bios_version_str[5];
7736
7737 /*
7738 * ThinkPad T23 or newer, A31 or newer, R50e or newer,
7739 * X32 or newer, all Z series; Some models must have an
7740 * up-to-date BIOS or they will not be detected.
7741 *
7742 * See http://thinkwiki.org/wiki/List_of_DMI_IDs
7743 */
7744 while ((dev = dmi_find_device(DMI_DEV_TYPE_OEM_STRING, NULL, dev))) {
7745 if (sscanf(dev->name,
7746 "IBM ThinkPad Embedded Controller -[%17c",
7747 ec_fw_string) == 1) {
7748 ec_fw_string[sizeof(ec_fw_string) - 1] = 0;
7749 ec_fw_string[strcspn(ec_fw_string, " ]")] = 0;
7750
7751 tp->ec_version_str = kstrdup(ec_fw_string, GFP_KERNEL);
7752 if (!tp->ec_version_str)
7753 return -ENOMEM;
7754
7755 if (tpacpi_is_valid_fw_id(ec_fw_string, 'H')) {
7756 tp->ec_model = ec_fw_string[0]
7757 | (ec_fw_string[1] << 8);
7758 tp->ec_release = (ec_fw_string[4] << 8)
7759 | ec_fw_string[5];
7760 } else {
7761 printk(TPACPI_NOTICE
7762 "ThinkPad firmware release %s "
7763 "doesn't match the known patterns\n",
7764 ec_fw_string);
7765 printk(TPACPI_NOTICE
7766 "please report this to %s\n",
7767 TPACPI_MAIL);
7768 }
7769 break;
7770 }
7771 }
7772
7773 s = dmi_get_system_info(DMI_PRODUCT_VERSION);
7774 if (s && !strnicmp(s, "ThinkPad", 8)) {
7775 tp->model_str = kstrdup(s, GFP_KERNEL);
7776 if (!tp->model_str)
7777 return -ENOMEM;
7778 }
7779
7780 s = dmi_get_system_info(DMI_PRODUCT_NAME);
7781 tp->nummodel_str = kstrdup(s, GFP_KERNEL);
7782 if (s && !tp->nummodel_str)
7783 return -ENOMEM;
7784
7785 return 0;
7786 }
7787
7788 static int __init probe_for_thinkpad(void)
7789 {
7790 int is_thinkpad;
7791
7792 if (acpi_disabled)
7793 return -ENODEV;
7794
7795 /*
7796 * Non-ancient models have better DMI tagging, but very old models
7797 * don't.
7798 */
7799 is_thinkpad = (thinkpad_id.model_str != NULL);
7800
7801 /* ec is required because many other handles are relative to it */
7802 TPACPI_ACPIHANDLE_INIT(ec);
7803 if (!ec_handle) {
7804 if (is_thinkpad)
7805 printk(TPACPI_ERR
7806 "Not yet supported ThinkPad detected!\n");
7807 return -ENODEV;
7808 }
7809
7810 /*
7811 * Risks a regression on very old machines, but reduces potential
7812 * false positives a damn great deal
7813 */
7814 if (!is_thinkpad)
7815 is_thinkpad = (thinkpad_id.vendor == PCI_VENDOR_ID_IBM);
7816
7817 if (!is_thinkpad && !force_load)
7818 return -ENODEV;
7819
7820 return 0;
7821 }
7822
7823
7824 /* Module init, exit, parameters */
7825
7826 static struct ibm_init_struct ibms_init[] __initdata = {
7827 {
7828 .init = thinkpad_acpi_driver_init,
7829 .data = &thinkpad_acpi_driver_data,
7830 },
7831 {
7832 .init = hotkey_init,
7833 .data = &hotkey_driver_data,
7834 },
7835 {
7836 .init = bluetooth_init,
7837 .data = &bluetooth_driver_data,
7838 },
7839 {
7840 .init = wan_init,
7841 .data = &wan_driver_data,
7842 },
7843 {
7844 .init = uwb_init,
7845 .data = &uwb_driver_data,
7846 },
7847 #ifdef CONFIG_THINKPAD_ACPI_VIDEO
7848 {
7849 .init = video_init,
7850 .data = &video_driver_data,
7851 },
7852 #endif
7853 {
7854 .init = light_init,
7855 .data = &light_driver_data,
7856 },
7857 #ifdef CONFIG_THINKPAD_ACPI_DOCK
7858 {
7859 .init = dock_init,
7860 .data = &dock_driver_data[0],
7861 },
7862 {
7863 .init = dock_init2,
7864 .data = &dock_driver_data[1],
7865 },
7866 #endif
7867 #ifdef CONFIG_THINKPAD_ACPI_BAY
7868 {
7869 .init = bay_init,
7870 .data = &bay_driver_data,
7871 },
7872 #endif
7873 {
7874 .init = cmos_init,
7875 .data = &cmos_driver_data,
7876 },
7877 {
7878 .init = led_init,
7879 .data = &led_driver_data,
7880 },
7881 {
7882 .init = beep_init,
7883 .data = &beep_driver_data,
7884 },
7885 {
7886 .init = thermal_init,
7887 .data = &thermal_driver_data,
7888 },
7889 {
7890 .data = &ecdump_driver_data,
7891 },
7892 {
7893 .init = brightness_init,
7894 .data = &brightness_driver_data,
7895 },
7896 {
7897 .data = &volume_driver_data,
7898 },
7899 {
7900 .init = fan_init,
7901 .data = &fan_driver_data,
7902 },
7903 };
7904
7905 static int __init set_ibm_param(const char *val, struct kernel_param *kp)
7906 {
7907 unsigned int i;
7908 struct ibm_struct *ibm;
7909
7910 if (!kp || !kp->name || !val)
7911 return -EINVAL;
7912
7913 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
7914 ibm = ibms_init[i].data;
7915 WARN_ON(ibm == NULL);
7916
7917 if (!ibm || !ibm->name)
7918 continue;
7919
7920 if (strcmp(ibm->name, kp->name) == 0 && ibm->write) {
7921 if (strlen(val) > sizeof(ibms_init[i].param) - 2)
7922 return -ENOSPC;
7923 strcpy(ibms_init[i].param, val);
7924 strcat(ibms_init[i].param, ",");
7925 return 0;
7926 }
7927 }
7928
7929 return -EINVAL;
7930 }
7931
7932 module_param(experimental, int, 0);
7933 MODULE_PARM_DESC(experimental,
7934 "Enables experimental features when non-zero");
7935
7936 module_param_named(debug, dbg_level, uint, 0);
7937 MODULE_PARM_DESC(debug, "Sets debug level bit-mask");
7938
7939 module_param(force_load, bool, 0);
7940 MODULE_PARM_DESC(force_load,
7941 "Attempts to load the driver even on a "
7942 "mis-identified ThinkPad when true");
7943
7944 module_param_named(fan_control, fan_control_allowed, bool, 0);
7945 MODULE_PARM_DESC(fan_control,
7946 "Enables setting fan parameters features when true");
7947
7948 module_param_named(brightness_mode, brightness_mode, uint, 0);
7949 MODULE_PARM_DESC(brightness_mode,
7950 "Selects brightness control strategy: "
7951 "0=auto, 1=EC, 2=UCMS, 3=EC+NVRAM");
7952
7953 module_param(brightness_enable, uint, 0);
7954 MODULE_PARM_DESC(brightness_enable,
7955 "Enables backlight control when 1, disables when 0");
7956
7957 module_param(hotkey_report_mode, uint, 0);
7958 MODULE_PARM_DESC(hotkey_report_mode,
7959 "used for backwards compatibility with userspace, "
7960 "see documentation");
7961
7962 #define TPACPI_PARAM(feature) \
7963 module_param_call(feature, set_ibm_param, NULL, NULL, 0); \
7964 MODULE_PARM_DESC(feature, "Simulates thinkpad-acpi procfs command " \
7965 "at module load, see documentation")
7966
7967 TPACPI_PARAM(hotkey);
7968 TPACPI_PARAM(bluetooth);
7969 TPACPI_PARAM(video);
7970 TPACPI_PARAM(light);
7971 #ifdef CONFIG_THINKPAD_ACPI_DOCK
7972 TPACPI_PARAM(dock);
7973 #endif
7974 #ifdef CONFIG_THINKPAD_ACPI_BAY
7975 TPACPI_PARAM(bay);
7976 #endif /* CONFIG_THINKPAD_ACPI_BAY */
7977 TPACPI_PARAM(cmos);
7978 TPACPI_PARAM(led);
7979 TPACPI_PARAM(beep);
7980 TPACPI_PARAM(ecdump);
7981 TPACPI_PARAM(brightness);
7982 TPACPI_PARAM(volume);
7983 TPACPI_PARAM(fan);
7984
7985 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
7986 module_param(dbg_wlswemul, uint, 0);
7987 MODULE_PARM_DESC(dbg_wlswemul, "Enables WLSW emulation");
7988 module_param_named(wlsw_state, tpacpi_wlsw_emulstate, bool, 0);
7989 MODULE_PARM_DESC(wlsw_state,
7990 "Initial state of the emulated WLSW switch");
7991
7992 module_param(dbg_bluetoothemul, uint, 0);
7993 MODULE_PARM_DESC(dbg_bluetoothemul, "Enables bluetooth switch emulation");
7994 module_param_named(bluetooth_state, tpacpi_bluetooth_emulstate, bool, 0);
7995 MODULE_PARM_DESC(bluetooth_state,
7996 "Initial state of the emulated bluetooth switch");
7997
7998 module_param(dbg_wwanemul, uint, 0);
7999 MODULE_PARM_DESC(dbg_wwanemul, "Enables WWAN switch emulation");
8000 module_param_named(wwan_state, tpacpi_wwan_emulstate, bool, 0);
8001 MODULE_PARM_DESC(wwan_state,
8002 "Initial state of the emulated WWAN switch");
8003
8004 module_param(dbg_uwbemul, uint, 0);
8005 MODULE_PARM_DESC(dbg_uwbemul, "Enables UWB switch emulation");
8006 module_param_named(uwb_state, tpacpi_uwb_emulstate, bool, 0);
8007 MODULE_PARM_DESC(uwb_state,
8008 "Initial state of the emulated UWB switch");
8009 #endif
8010
8011 static void thinkpad_acpi_module_exit(void)
8012 {
8013 struct ibm_struct *ibm, *itmp;
8014
8015 tpacpi_lifecycle = TPACPI_LIFE_EXITING;
8016
8017 list_for_each_entry_safe_reverse(ibm, itmp,
8018 &tpacpi_all_drivers,
8019 all_drivers) {
8020 ibm_exit(ibm);
8021 }
8022
8023 dbg_printk(TPACPI_DBG_INIT, "finished subdriver exit path...\n");
8024
8025 if (tpacpi_inputdev) {
8026 if (tp_features.input_device_registered)
8027 input_unregister_device(tpacpi_inputdev);
8028 else
8029 input_free_device(tpacpi_inputdev);
8030 }
8031
8032 if (tpacpi_hwmon)
8033 hwmon_device_unregister(tpacpi_hwmon);
8034
8035 if (tp_features.sensors_pdev_attrs_registered)
8036 device_remove_file(&tpacpi_sensors_pdev->dev,
8037 &dev_attr_thinkpad_acpi_pdev_name);
8038 if (tpacpi_sensors_pdev)
8039 platform_device_unregister(tpacpi_sensors_pdev);
8040 if (tpacpi_pdev)
8041 platform_device_unregister(tpacpi_pdev);
8042
8043 if (tp_features.sensors_pdrv_attrs_registered)
8044 tpacpi_remove_driver_attributes(&tpacpi_hwmon_pdriver.driver);
8045 if (tp_features.platform_drv_attrs_registered)
8046 tpacpi_remove_driver_attributes(&tpacpi_pdriver.driver);
8047
8048 if (tp_features.sensors_pdrv_registered)
8049 platform_driver_unregister(&tpacpi_hwmon_pdriver);
8050
8051 if (tp_features.platform_drv_registered)
8052 platform_driver_unregister(&tpacpi_pdriver);
8053
8054 if (proc_dir)
8055 remove_proc_entry(TPACPI_PROC_DIR, acpi_root_dir);
8056
8057 if (tpacpi_wq)
8058 destroy_workqueue(tpacpi_wq);
8059
8060 kfree(thinkpad_id.bios_version_str);
8061 kfree(thinkpad_id.ec_version_str);
8062 kfree(thinkpad_id.model_str);
8063 }
8064
8065
8066 static int __init thinkpad_acpi_module_init(void)
8067 {
8068 int ret, i;
8069
8070 tpacpi_lifecycle = TPACPI_LIFE_INIT;
8071
8072 /* Parameter checking */
8073 if (hotkey_report_mode > 2)
8074 return -EINVAL;
8075
8076 /* Driver-level probe */
8077
8078 ret = get_thinkpad_model_data(&thinkpad_id);
8079 if (ret) {
8080 printk(TPACPI_ERR
8081 "unable to get DMI data: %d\n", ret);
8082 thinkpad_acpi_module_exit();
8083 return ret;
8084 }
8085 ret = probe_for_thinkpad();
8086 if (ret) {
8087 thinkpad_acpi_module_exit();
8088 return ret;
8089 }
8090
8091 /* Driver initialization */
8092
8093 TPACPI_ACPIHANDLE_INIT(ecrd);
8094 TPACPI_ACPIHANDLE_INIT(ecwr);
8095
8096 tpacpi_wq = create_singlethread_workqueue(TPACPI_WORKQUEUE_NAME);
8097 if (!tpacpi_wq) {
8098 thinkpad_acpi_module_exit();
8099 return -ENOMEM;
8100 }
8101
8102 proc_dir = proc_mkdir(TPACPI_PROC_DIR, acpi_root_dir);
8103 if (!proc_dir) {
8104 printk(TPACPI_ERR
8105 "unable to create proc dir " TPACPI_PROC_DIR);
8106 thinkpad_acpi_module_exit();
8107 return -ENODEV;
8108 }
8109
8110 ret = platform_driver_register(&tpacpi_pdriver);
8111 if (ret) {
8112 printk(TPACPI_ERR
8113 "unable to register main platform driver\n");
8114 thinkpad_acpi_module_exit();
8115 return ret;
8116 }
8117 tp_features.platform_drv_registered = 1;
8118
8119 ret = platform_driver_register(&tpacpi_hwmon_pdriver);
8120 if (ret) {
8121 printk(TPACPI_ERR
8122 "unable to register hwmon platform driver\n");
8123 thinkpad_acpi_module_exit();
8124 return ret;
8125 }
8126 tp_features.sensors_pdrv_registered = 1;
8127
8128 ret = tpacpi_create_driver_attributes(&tpacpi_pdriver.driver);
8129 if (!ret) {
8130 tp_features.platform_drv_attrs_registered = 1;
8131 ret = tpacpi_create_driver_attributes(
8132 &tpacpi_hwmon_pdriver.driver);
8133 }
8134 if (ret) {
8135 printk(TPACPI_ERR
8136 "unable to create sysfs driver attributes\n");
8137 thinkpad_acpi_module_exit();
8138 return ret;
8139 }
8140 tp_features.sensors_pdrv_attrs_registered = 1;
8141
8142
8143 /* Device initialization */
8144 tpacpi_pdev = platform_device_register_simple(TPACPI_DRVR_NAME, -1,
8145 NULL, 0);
8146 if (IS_ERR(tpacpi_pdev)) {
8147 ret = PTR_ERR(tpacpi_pdev);
8148 tpacpi_pdev = NULL;
8149 printk(TPACPI_ERR "unable to register platform device\n");
8150 thinkpad_acpi_module_exit();
8151 return ret;
8152 }
8153 tpacpi_sensors_pdev = platform_device_register_simple(
8154 TPACPI_HWMON_DRVR_NAME,
8155 -1, NULL, 0);
8156 if (IS_ERR(tpacpi_sensors_pdev)) {
8157 ret = PTR_ERR(tpacpi_sensors_pdev);
8158 tpacpi_sensors_pdev = NULL;
8159 printk(TPACPI_ERR
8160 "unable to register hwmon platform device\n");
8161 thinkpad_acpi_module_exit();
8162 return ret;
8163 }
8164 ret = device_create_file(&tpacpi_sensors_pdev->dev,
8165 &dev_attr_thinkpad_acpi_pdev_name);
8166 if (ret) {
8167 printk(TPACPI_ERR
8168 "unable to create sysfs hwmon device attributes\n");
8169 thinkpad_acpi_module_exit();
8170 return ret;
8171 }
8172 tp_features.sensors_pdev_attrs_registered = 1;
8173 tpacpi_hwmon = hwmon_device_register(&tpacpi_sensors_pdev->dev);
8174 if (IS_ERR(tpacpi_hwmon)) {
8175 ret = PTR_ERR(tpacpi_hwmon);
8176 tpacpi_hwmon = NULL;
8177 printk(TPACPI_ERR "unable to register hwmon device\n");
8178 thinkpad_acpi_module_exit();
8179 return ret;
8180 }
8181 mutex_init(&tpacpi_inputdev_send_mutex);
8182 tpacpi_inputdev = input_allocate_device();
8183 if (!tpacpi_inputdev) {
8184 printk(TPACPI_ERR "unable to allocate input device\n");
8185 thinkpad_acpi_module_exit();
8186 return -ENOMEM;
8187 } else {
8188 /* Prepare input device, but don't register */
8189 tpacpi_inputdev->name = "ThinkPad Extra Buttons";
8190 tpacpi_inputdev->phys = TPACPI_DRVR_NAME "/input0";
8191 tpacpi_inputdev->id.bustype = BUS_HOST;
8192 tpacpi_inputdev->id.vendor = (thinkpad_id.vendor) ?
8193 thinkpad_id.vendor :
8194 PCI_VENDOR_ID_IBM;
8195 tpacpi_inputdev->id.product = TPACPI_HKEY_INPUT_PRODUCT;
8196 tpacpi_inputdev->id.version = TPACPI_HKEY_INPUT_VERSION;
8197 }
8198 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
8199 ret = ibm_init(&ibms_init[i]);
8200 if (ret >= 0 && *ibms_init[i].param)
8201 ret = ibms_init[i].data->write(ibms_init[i].param);
8202 if (ret < 0) {
8203 thinkpad_acpi_module_exit();
8204 return ret;
8205 }
8206 }
8207 ret = input_register_device(tpacpi_inputdev);
8208 if (ret < 0) {
8209 printk(TPACPI_ERR "unable to register input device\n");
8210 thinkpad_acpi_module_exit();
8211 return ret;
8212 } else {
8213 tp_features.input_device_registered = 1;
8214 }
8215
8216 tpacpi_lifecycle = TPACPI_LIFE_RUNNING;
8217 return 0;
8218 }
8219
8220 MODULE_ALIAS(TPACPI_DRVR_SHORTNAME);
8221
8222 /*
8223 * This will autoload the driver in almost every ThinkPad
8224 * in widespread use.
8225 *
8226 * Only _VERY_ old models, like the 240, 240x and 570 lack
8227 * the HKEY event interface.
8228 */
8229 MODULE_DEVICE_TABLE(acpi, ibm_htk_device_ids);
8230
8231 /*
8232 * DMI matching for module autoloading
8233 *
8234 * See http://thinkwiki.org/wiki/List_of_DMI_IDs
8235 * See http://thinkwiki.org/wiki/BIOS_Upgrade_Downloads
8236 *
8237 * Only models listed in thinkwiki will be supported, so add yours
8238 * if it is not there yet.
8239 */
8240 #define IBM_BIOS_MODULE_ALIAS(__type) \
8241 MODULE_ALIAS("dmi:bvnIBM:bvr" __type "ET??WW*")
8242
8243 /* Ancient thinkpad BIOSes have to be identified by
8244 * BIOS type or model number, and there are far less
8245 * BIOS types than model numbers... */
8246 IBM_BIOS_MODULE_ALIAS("I[MU]"); /* 570, 570e */
8247
8248 MODULE_AUTHOR("Borislav Deianov <borislav@users.sf.net>");
8249 MODULE_AUTHOR("Henrique de Moraes Holschuh <hmh@hmh.eng.br>");
8250 MODULE_DESCRIPTION(TPACPI_DESC);
8251 MODULE_VERSION(TPACPI_VERSION);
8252 MODULE_LICENSE("GPL");
8253
8254 module_init(thinkpad_acpi_module_init);
8255 module_exit(thinkpad_acpi_module_exit);
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