]> git.proxmox.com Git - mirror_ubuntu-bionic-kernel.git/blob - drivers/platform/x86/thinkpad_acpi.c
projects / mirror_ubuntu-bionic-kernel.git / blob
? search:


c8d74dbacbbd4646989d1c3867ba801afbf9c329
[mirror_ubuntu-bionic-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 /* rfkill switches */
170 enum {
171 TPACPI_RFK_BLUETOOTH_SW_ID = 0,
172 TPACPI_RFK_WWAN_SW_ID,
173 TPACPI_RFK_UWB_SW_ID,
174 };
175
176 /* printk headers */
177 #define TPACPI_LOG TPACPI_FILE ": "
178 #define TPACPI_EMERG KERN_EMERG TPACPI_LOG
179 #define TPACPI_ALERT KERN_ALERT TPACPI_LOG
180 #define TPACPI_CRIT KERN_CRIT TPACPI_LOG
181 #define TPACPI_ERR KERN_ERR TPACPI_LOG
182 #define TPACPI_WARN KERN_WARNING TPACPI_LOG
183 #define TPACPI_NOTICE KERN_NOTICE TPACPI_LOG
184 #define TPACPI_INFO KERN_INFO TPACPI_LOG
185 #define TPACPI_DEBUG KERN_DEBUG TPACPI_LOG
186
187 /* Debugging printk groups */
188 #define TPACPI_DBG_ALL 0xffff
189 #define TPACPI_DBG_DISCLOSETASK 0x8000
190 #define TPACPI_DBG_INIT 0x0001
191 #define TPACPI_DBG_EXIT 0x0002
192 #define TPACPI_DBG_RFKILL 0x0004
193 #define TPACPI_DBG_HKEY 0x0008
194 #define TPACPI_DBG_FAN 0x0010
195 #define TPACPI_DBG_BRGHT 0x0020
196
197 #define onoff(status, bit) ((status) & (1 << (bit)) ? "on" : "off")
198 #define enabled(status, bit) ((status) & (1 << (bit)) ? "enabled" : "disabled")
199 #define strlencmp(a, b) (strncmp((a), (b), strlen(b)))
200
201
202 /****************************************************************************
203 * Driver-wide structs and misc. variables
204 */
205
206 struct ibm_struct;
207
208 struct tp_acpi_drv_struct {
209 const struct acpi_device_id *hid;
210 struct acpi_driver *driver;
211
212 void (*notify) (struct ibm_struct *, u32);
213 acpi_handle *handle;
214 u32 type;
215 struct acpi_device *device;
216 };
217
218 struct ibm_struct {
219 char *name;
220
221 int (*read) (char *);
222 int (*write) (char *);
223 void (*exit) (void);
224 void (*resume) (void);
225 void (*suspend) (pm_message_t state);
226 void (*shutdown) (void);
227
228 struct list_head all_drivers;
229
230 struct tp_acpi_drv_struct *acpi;
231
232 struct {
233 u8 acpi_driver_registered:1;
234 u8 acpi_notify_installed:1;
235 u8 proc_created:1;
236 u8 init_called:1;
237 u8 experimental:1;
238 } flags;
239 };
240
241 struct ibm_init_struct {
242 char param[32];
243
244 int (*init) (struct ibm_init_struct *);
245 struct ibm_struct *data;
246 };
247
248 static struct {
249 #ifdef CONFIG_THINKPAD_ACPI_BAY
250 u32 bay_status:1;
251 u32 bay_eject:1;
252 u32 bay_status2:1;
253 u32 bay_eject2:1;
254 #endif
255 u32 bluetooth:1;
256 u32 hotkey:1;
257 u32 hotkey_mask:1;
258 u32 hotkey_wlsw:1;
259 u32 hotkey_tablet:1;
260 u32 light:1;
261 u32 light_status:1;
262 u32 bright_16levels:1;
263 u32 bright_acpimode:1;
264 u32 wan:1;
265 u32 uwb:1;
266 u32 fan_ctrl_status_undef:1;
267 u32 beep_needs_two_args:1;
268 u32 input_device_registered:1;
269 u32 platform_drv_registered:1;
270 u32 platform_drv_attrs_registered:1;
271 u32 sensors_pdrv_registered:1;
272 u32 sensors_pdrv_attrs_registered:1;
273 u32 sensors_pdev_attrs_registered:1;
274 u32 hotkey_poll_active:1;
275 } tp_features;
276
277 static struct {
278 u16 hotkey_mask_ff:1;
279 } tp_warned;
280
281 struct thinkpad_id_data {
282 unsigned int vendor; /* ThinkPad vendor:
283 * PCI_VENDOR_ID_IBM/PCI_VENDOR_ID_LENOVO */
284
285 char *bios_version_str; /* Something like 1ZET51WW (1.03z) */
286 char *ec_version_str; /* Something like 1ZHT51WW-1.04a */
287
288 u16 bios_model; /* 1Y = 0x5931, 0 = unknown */
289 u16 ec_model;
290 u16 bios_release; /* 1ZETK1WW = 0x314b, 0 = unknown */
291 u16 ec_release;
292
293 char *model_str; /* ThinkPad T43 */
294 char *nummodel_str; /* 9384A9C for a 9384-A9C model */
295 };
296 static struct thinkpad_id_data thinkpad_id;
297
298 static enum {
299 TPACPI_LIFE_INIT = 0,
300 TPACPI_LIFE_RUNNING,
301 TPACPI_LIFE_EXITING,
302 } tpacpi_lifecycle;
303
304 static int experimental;
305 static u32 dbg_level;
306
307 static struct workqueue_struct *tpacpi_wq;
308
309 enum led_status_t {
310 TPACPI_LED_OFF = 0,
311 TPACPI_LED_ON,
312 TPACPI_LED_BLINK,
313 };
314
315 /* Special LED class that can defer work */
316 struct tpacpi_led_classdev {
317 struct led_classdev led_classdev;
318 struct work_struct work;
319 enum led_status_t new_state;
320 unsigned int led;
321 };
322
323 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
324 static int dbg_wlswemul;
325 static int tpacpi_wlsw_emulstate;
326 static int dbg_bluetoothemul;
327 static int tpacpi_bluetooth_emulstate;
328 static int dbg_wwanemul;
329 static int tpacpi_wwan_emulstate;
330 static int dbg_uwbemul;
331 static int tpacpi_uwb_emulstate;
332 #endif
333
334
335 /*************************************************************************
336 * Debugging helpers
337 */
338
339 #define dbg_printk(a_dbg_level, format, arg...) \
340 do { if (dbg_level & (a_dbg_level)) \
341 printk(TPACPI_DEBUG "%s: " format, __func__ , ## arg); \
342 } while (0)
343
344 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
345 #define vdbg_printk dbg_printk
346 static const char *str_supported(int is_supported);
347 #else
348 #define vdbg_printk(a_dbg_level, format, arg...) \
349 do { } while (0)
350 #endif
351
352 static void tpacpi_log_usertask(const char * const what)
353 {
354 printk(TPACPI_DEBUG "%s: access by process with PID %d\n",
355 what, task_tgid_vnr(current));
356 }
357
358 #define tpacpi_disclose_usertask(what, format, arg...) \
359 do { \
360 if (unlikely( \
361 (dbg_level & TPACPI_DBG_DISCLOSETASK) && \
362 (tpacpi_lifecycle == TPACPI_LIFE_RUNNING))) { \
363 printk(TPACPI_DEBUG "%s: PID %d: " format, \
364 what, task_tgid_vnr(current), ## arg); \
365 } \
366 } while (0)
367
368 /*
369 * Quirk handling helpers
370 *
371 * ThinkPad IDs and versions seen in the field so far
372 * are two-characters from the set [0-9A-Z], i.e. base 36.
373 *
374 * We use values well outside that range as specials.
375 */
376
377 #define TPACPI_MATCH_ANY 0xffffU
378 #define TPACPI_MATCH_UNKNOWN 0U
379
380 /* TPID('1', 'Y') == 0x5931 */
381 #define TPID(__c1, __c2) (((__c2) << 8) | (__c1))
382
383 #define TPACPI_Q_IBM(__id1, __id2, __quirk) \
384 { .vendor = PCI_VENDOR_ID_IBM, \
385 .bios = TPID(__id1, __id2), \
386 .ec = TPACPI_MATCH_ANY, \
387 .quirks = (__quirk) }
388
389 #define TPACPI_Q_LNV(__id1, __id2, __quirk) \
390 { .vendor = PCI_VENDOR_ID_LENOVO, \
391 .bios = TPID(__id1, __id2), \
392 .ec = TPACPI_MATCH_ANY, \
393 .quirks = (__quirk) }
394
395 struct tpacpi_quirk {
396 unsigned int vendor;
397 u16 bios;
398 u16 ec;
399 unsigned long quirks;
400 };
401
402 /**
403 * tpacpi_check_quirks() - search BIOS/EC version on a list
404 * @qlist: array of &struct tpacpi_quirk
405 * @qlist_size: number of elements in @qlist
406 *
407 * Iterates over a quirks list until one is found that matches the
408 * ThinkPad's vendor, BIOS and EC model.
409 *
410 * Returns 0 if nothing matches, otherwise returns the quirks field of
411 * the matching &struct tpacpi_quirk entry.
412 *
413 * The match criteria is: vendor, ec and bios much match.
414 */
415 static unsigned long __init tpacpi_check_quirks(
416 const struct tpacpi_quirk *qlist,
417 unsigned int qlist_size)
418 {
419 while (qlist_size) {
420 if ((qlist->vendor == thinkpad_id.vendor ||
421 qlist->vendor == TPACPI_MATCH_ANY) &&
422 (qlist->bios == thinkpad_id.bios_model ||
423 qlist->bios == TPACPI_MATCH_ANY) &&
424 (qlist->ec == thinkpad_id.ec_model ||
425 qlist->ec == TPACPI_MATCH_ANY))
426 return qlist->quirks;
427
428 qlist_size--;
429 qlist++;
430 }
431 return 0;
432 }
433
434
435 /****************************************************************************
436 ****************************************************************************
437 *
438 * ACPI Helpers and device model
439 *
440 ****************************************************************************
441 ****************************************************************************/
442
443 /*************************************************************************
444 * ACPI basic handles
445 */
446
447 static acpi_handle root_handle;
448
449 #define TPACPI_HANDLE(object, parent, paths...) \
450 static acpi_handle object##_handle; \
451 static acpi_handle *object##_parent = &parent##_handle; \
452 static char *object##_path; \
453 static char *object##_paths[] = { paths }
454
455 TPACPI_HANDLE(ec, root, "\\_SB.PCI0.ISA.EC0", /* 240, 240x */
456 "\\_SB.PCI.ISA.EC", /* 570 */
457 "\\_SB.PCI0.ISA0.EC0", /* 600e/x, 770e, 770x */
458 "\\_SB.PCI0.ISA.EC", /* A21e, A2xm/p, T20-22, X20-21 */
459 "\\_SB.PCI0.AD4S.EC0", /* i1400, R30 */
460 "\\_SB.PCI0.ICH3.EC0", /* R31 */
461 "\\_SB.PCI0.LPC.EC", /* all others */
462 );
463
464 TPACPI_HANDLE(ecrd, ec, "ECRD"); /* 570 */
465 TPACPI_HANDLE(ecwr, ec, "ECWR"); /* 570 */
466
467 TPACPI_HANDLE(cmos, root, "\\UCMS", /* R50, R50e, R50p, R51, */
468 /* T4x, X31, X40 */
469 "\\CMOS", /* A3x, G4x, R32, T23, T30, X22-24, X30 */
470 "\\CMS", /* R40, R40e */
471 ); /* all others */
472
473 TPACPI_HANDLE(hkey, ec, "\\_SB.HKEY", /* 600e/x, 770e, 770x */
474 "^HKEY", /* R30, R31 */
475 "HKEY", /* all others */
476 ); /* 570 */
477
478 TPACPI_HANDLE(vid, root, "\\_SB.PCI.AGP.VGA", /* 570 */
479 "\\_SB.PCI0.AGP0.VID0", /* 600e/x, 770x */
480 "\\_SB.PCI0.VID0", /* 770e */
481 "\\_SB.PCI0.VID", /* A21e, G4x, R50e, X30, X40 */
482 "\\_SB.PCI0.AGP.VID", /* all others */
483 ); /* R30, R31 */
484
485
486 /*************************************************************************
487 * ACPI helpers
488 */
489
490 static int acpi_evalf(acpi_handle handle,
491 void *res, char *method, char *fmt, ...)
492 {
493 char *fmt0 = fmt;
494 struct acpi_object_list params;
495 union acpi_object in_objs[TPACPI_MAX_ACPI_ARGS];
496 struct acpi_buffer result, *resultp;
497 union acpi_object out_obj;
498 acpi_status status;
499 va_list ap;
500 char res_type;
501 int success;
502 int quiet;
503
504 if (!*fmt) {
505 printk(TPACPI_ERR "acpi_evalf() called with empty format\n");
506 return 0;
507 }
508
509 if (*fmt == 'q') {
510 quiet = 1;
511 fmt++;
512 } else
513 quiet = 0;
514
515 res_type = *(fmt++);
516
517 params.count = 0;
518 params.pointer = &in_objs[0];
519
520 va_start(ap, fmt);
521 while (*fmt) {
522 char c = *(fmt++);
523 switch (c) {
524 case 'd': /* int */
525 in_objs[params.count].integer.value = va_arg(ap, int);
526 in_objs[params.count++].type = ACPI_TYPE_INTEGER;
527 break;
528 /* add more types as needed */
529 default:
530 printk(TPACPI_ERR "acpi_evalf() called "
531 "with invalid format character '%c'\n", c);
532 return 0;
533 }
534 }
535 va_end(ap);
536
537 if (res_type != 'v') {
538 result.length = sizeof(out_obj);
539 result.pointer = &out_obj;
540 resultp = &result;
541 } else
542 resultp = NULL;
543
544 status = acpi_evaluate_object(handle, method, &params, resultp);
545
546 switch (res_type) {
547 case 'd': /* int */
548 if (res)
549 *(int *)res = out_obj.integer.value;
550 success = status == AE_OK && out_obj.type == ACPI_TYPE_INTEGER;
551 break;
552 case 'v': /* void */
553 success = status == AE_OK;
554 break;
555 /* add more types as needed */
556 default:
557 printk(TPACPI_ERR "acpi_evalf() called "
558 "with invalid format character '%c'\n", res_type);
559 return 0;
560 }
561
562 if (!success && !quiet)
563 printk(TPACPI_ERR "acpi_evalf(%s, %s, ...) failed: %d\n",
564 method, fmt0, status);
565
566 return success;
567 }
568
569 static int acpi_ec_read(int i, u8 *p)
570 {
571 int v;
572
573 if (ecrd_handle) {
574 if (!acpi_evalf(ecrd_handle, &v, NULL, "dd", i))
575 return 0;
576 *p = v;
577 } else {
578 if (ec_read(i, p) < 0)
579 return 0;
580 }
581
582 return 1;
583 }
584
585 static int acpi_ec_write(int i, u8 v)
586 {
587 if (ecwr_handle) {
588 if (!acpi_evalf(ecwr_handle, NULL, NULL, "vdd", i, v))
589 return 0;
590 } else {
591 if (ec_write(i, v) < 0)
592 return 0;
593 }
594
595 return 1;
596 }
597
598 #if defined(CONFIG_THINKPAD_ACPI_DOCK) || defined(CONFIG_THINKPAD_ACPI_BAY)
599 static int _sta(acpi_handle handle)
600 {
601 int status;
602
603 if (!handle || !acpi_evalf(handle, &status, "_STA", "d"))
604 status = 0;
605
606 return status;
607 }
608 #endif
609
610 static int issue_thinkpad_cmos_command(int cmos_cmd)
611 {
612 if (!cmos_handle)
613 return -ENXIO;
614
615 if (!acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd))
616 return -EIO;
617
618 return 0;
619 }
620
621 /*************************************************************************
622 * ACPI device model
623 */
624
625 #define TPACPI_ACPIHANDLE_INIT(object) \
626 drv_acpi_handle_init(#object, &object##_handle, *object##_parent, \
627 object##_paths, ARRAY_SIZE(object##_paths), &object##_path)
628
629 static void drv_acpi_handle_init(char *name,
630 acpi_handle *handle, acpi_handle parent,
631 char **paths, int num_paths, char **path)
632 {
633 int i;
634 acpi_status status;
635
636 vdbg_printk(TPACPI_DBG_INIT, "trying to locate ACPI handle for %s\n",
637 name);
638
639 for (i = 0; i < num_paths; i++) {
640 status = acpi_get_handle(parent, paths[i], handle);
641 if (ACPI_SUCCESS(status)) {
642 *path = paths[i];
643 dbg_printk(TPACPI_DBG_INIT,
644 "Found ACPI handle %s for %s\n",
645 *path, name);
646 return;
647 }
648 }
649
650 vdbg_printk(TPACPI_DBG_INIT, "ACPI handle for %s not found\n",
651 name);
652 *handle = NULL;
653 }
654
655 static void dispatch_acpi_notify(acpi_handle handle, u32 event, void *data)
656 {
657 struct ibm_struct *ibm = data;
658
659 if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
660 return;
661
662 if (!ibm || !ibm->acpi || !ibm->acpi->notify)
663 return;
664
665 ibm->acpi->notify(ibm, event);
666 }
667
668 static int __init setup_acpi_notify(struct ibm_struct *ibm)
669 {
670 acpi_status status;
671 int rc;
672
673 BUG_ON(!ibm->acpi);
674
675 if (!*ibm->acpi->handle)
676 return 0;
677
678 vdbg_printk(TPACPI_DBG_INIT,
679 "setting up ACPI notify for %s\n", ibm->name);
680
681 rc = acpi_bus_get_device(*ibm->acpi->handle, &ibm->acpi->device);
682 if (rc < 0) {
683 printk(TPACPI_ERR "acpi_bus_get_device(%s) failed: %d\n",
684 ibm->name, rc);
685 return -ENODEV;
686 }
687
688 ibm->acpi->device->driver_data = ibm;
689 sprintf(acpi_device_class(ibm->acpi->device), "%s/%s",
690 TPACPI_ACPI_EVENT_PREFIX,
691 ibm->name);
692
693 status = acpi_install_notify_handler(*ibm->acpi->handle,
694 ibm->acpi->type, dispatch_acpi_notify, ibm);
695 if (ACPI_FAILURE(status)) {
696 if (status == AE_ALREADY_EXISTS) {
697 printk(TPACPI_NOTICE
698 "another device driver is already "
699 "handling %s events\n", ibm->name);
700 } else {
701 printk(TPACPI_ERR
702 "acpi_install_notify_handler(%s) failed: %d\n",
703 ibm->name, status);
704 }
705 return -ENODEV;
706 }
707 ibm->flags.acpi_notify_installed = 1;
708 return 0;
709 }
710
711 static int __init tpacpi_device_add(struct acpi_device *device)
712 {
713 return 0;
714 }
715
716 static int __init register_tpacpi_subdriver(struct ibm_struct *ibm)
717 {
718 int rc;
719
720 dbg_printk(TPACPI_DBG_INIT,
721 "registering %s as an ACPI driver\n", ibm->name);
722
723 BUG_ON(!ibm->acpi);
724
725 ibm->acpi->driver = kzalloc(sizeof(struct acpi_driver), GFP_KERNEL);
726 if (!ibm->acpi->driver) {
727 printk(TPACPI_ERR
728 "failed to allocate memory for ibm->acpi->driver\n");
729 return -ENOMEM;
730 }
731
732 sprintf(ibm->acpi->driver->name, "%s_%s", TPACPI_NAME, ibm->name);
733 ibm->acpi->driver->ids = ibm->acpi->hid;
734
735 ibm->acpi->driver->ops.add = &tpacpi_device_add;
736
737 rc = acpi_bus_register_driver(ibm->acpi->driver);
738 if (rc < 0) {
739 printk(TPACPI_ERR "acpi_bus_register_driver(%s) failed: %d\n",
740 ibm->name, rc);
741 kfree(ibm->acpi->driver);
742 ibm->acpi->driver = NULL;
743 } else if (!rc)
744 ibm->flags.acpi_driver_registered = 1;
745
746 return rc;
747 }
748
749
750 /****************************************************************************
751 ****************************************************************************
752 *
753 * Procfs Helpers
754 *
755 ****************************************************************************
756 ****************************************************************************/
757
758 static int dispatch_procfs_read(char *page, char **start, off_t off,
759 int count, int *eof, void *data)
760 {
761 struct ibm_struct *ibm = data;
762 int len;
763
764 if (!ibm || !ibm->read)
765 return -EINVAL;
766
767 len = ibm->read(page);
768 if (len < 0)
769 return len;
770
771 if (len <= off + count)
772 *eof = 1;
773 *start = page + off;
774 len -= off;
775 if (len > count)
776 len = count;
777 if (len < 0)
778 len = 0;
779
780 return len;
781 }
782
783 static int dispatch_procfs_write(struct file *file,
784 const char __user *userbuf,
785 unsigned long count, void *data)
786 {
787 struct ibm_struct *ibm = data;
788 char *kernbuf;
789 int ret;
790
791 if (!ibm || !ibm->write)
792 return -EINVAL;
793
794 kernbuf = kmalloc(count + 2, GFP_KERNEL);
795 if (!kernbuf)
796 return -ENOMEM;
797
798 if (copy_from_user(kernbuf, userbuf, count)) {
799 kfree(kernbuf);
800 return -EFAULT;
801 }
802
803 kernbuf[count] = 0;
804 strcat(kernbuf, ",");
805 ret = ibm->write(kernbuf);
806 if (ret == 0)
807 ret = count;
808
809 kfree(kernbuf);
810
811 return ret;
812 }
813
814 static char *next_cmd(char **cmds)
815 {
816 char *start = *cmds;
817 char *end;
818
819 while ((end = strchr(start, ',')) && end == start)
820 start = end + 1;
821
822 if (!end)
823 return NULL;
824
825 *end = 0;
826 *cmds = end + 1;
827 return start;
828 }
829
830
831 /****************************************************************************
832 ****************************************************************************
833 *
834 * Device model: input, hwmon and platform
835 *
836 ****************************************************************************
837 ****************************************************************************/
838
839 static struct platform_device *tpacpi_pdev;
840 static struct platform_device *tpacpi_sensors_pdev;
841 static struct device *tpacpi_hwmon;
842 static struct input_dev *tpacpi_inputdev;
843 static struct mutex tpacpi_inputdev_send_mutex;
844 static LIST_HEAD(tpacpi_all_drivers);
845
846 static int tpacpi_suspend_handler(struct platform_device *pdev,
847 pm_message_t state)
848 {
849 struct ibm_struct *ibm, *itmp;
850
851 list_for_each_entry_safe(ibm, itmp,
852 &tpacpi_all_drivers,
853 all_drivers) {
854 if (ibm->suspend)
855 (ibm->suspend)(state);
856 }
857
858 return 0;
859 }
860
861 static int tpacpi_resume_handler(struct platform_device *pdev)
862 {
863 struct ibm_struct *ibm, *itmp;
864
865 list_for_each_entry_safe(ibm, itmp,
866 &tpacpi_all_drivers,
867 all_drivers) {
868 if (ibm->resume)
869 (ibm->resume)();
870 }
871
872 return 0;
873 }
874
875 static void tpacpi_shutdown_handler(struct platform_device *pdev)
876 {
877 struct ibm_struct *ibm, *itmp;
878
879 list_for_each_entry_safe(ibm, itmp,
880 &tpacpi_all_drivers,
881 all_drivers) {
882 if (ibm->shutdown)
883 (ibm->shutdown)();
884 }
885 }
886
887 static struct platform_driver tpacpi_pdriver = {
888 .driver = {
889 .name = TPACPI_DRVR_NAME,
890 .owner = THIS_MODULE,
891 },
892 .suspend = tpacpi_suspend_handler,
893 .resume = tpacpi_resume_handler,
894 .shutdown = tpacpi_shutdown_handler,
895 };
896
897 static struct platform_driver tpacpi_hwmon_pdriver = {
898 .driver = {
899 .name = TPACPI_HWMON_DRVR_NAME,
900 .owner = THIS_MODULE,
901 },
902 };
903
904 /*************************************************************************
905 * sysfs support helpers
906 */
907
908 struct attribute_set {
909 unsigned int members, max_members;
910 struct attribute_group group;
911 };
912
913 struct attribute_set_obj {
914 struct attribute_set s;
915 struct attribute *a;
916 } __attribute__((packed));
917
918 static struct attribute_set *create_attr_set(unsigned int max_members,
919 const char *name)
920 {
921 struct attribute_set_obj *sobj;
922
923 if (max_members == 0)
924 return NULL;
925
926 /* Allocates space for implicit NULL at the end too */
927 sobj = kzalloc(sizeof(struct attribute_set_obj) +
928 max_members * sizeof(struct attribute *),
929 GFP_KERNEL);
930 if (!sobj)
931 return NULL;
932 sobj->s.max_members = max_members;
933 sobj->s.group.attrs = &sobj->a;
934 sobj->s.group.name = name;
935
936 return &sobj->s;
937 }
938
939 #define destroy_attr_set(_set) \
940 kfree(_set);
941
942 /* not multi-threaded safe, use it in a single thread per set */
943 static int add_to_attr_set(struct attribute_set *s, struct attribute *attr)
944 {
945 if (!s || !attr)
946 return -EINVAL;
947
948 if (s->members >= s->max_members)
949 return -ENOMEM;
950
951 s->group.attrs[s->members] = attr;
952 s->members++;
953
954 return 0;
955 }
956
957 static int add_many_to_attr_set(struct attribute_set *s,
958 struct attribute **attr,
959 unsigned int count)
960 {
961 int i, res;
962
963 for (i = 0; i < count; i++) {
964 res = add_to_attr_set(s, attr[i]);
965 if (res)
966 return res;
967 }
968
969 return 0;
970 }
971
972 static void delete_attr_set(struct attribute_set *s, struct kobject *kobj)
973 {
974 sysfs_remove_group(kobj, &s->group);
975 destroy_attr_set(s);
976 }
977
978 #define register_attr_set_with_sysfs(_attr_set, _kobj) \
979 sysfs_create_group(_kobj, &_attr_set->group)
980
981 static int parse_strtoul(const char *buf,
982 unsigned long max, unsigned long *value)
983 {
984 char *endp;
985
986 while (*buf && isspace(*buf))
987 buf++;
988 *value = simple_strtoul(buf, &endp, 0);
989 while (*endp && isspace(*endp))
990 endp++;
991 if (*endp || *value > max)
992 return -EINVAL;
993
994 return 0;
995 }
996
997 static void tpacpi_disable_brightness_delay(void)
998 {
999 if (acpi_evalf(hkey_handle, NULL, "PWMS", "qvd", 0))
1000 printk(TPACPI_NOTICE
1001 "ACPI backlight control delay disabled\n");
1002 }
1003
1004 static int __init tpacpi_query_bcl_levels(acpi_handle handle)
1005 {
1006 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
1007 union acpi_object *obj;
1008 int rc;
1009
1010 if (ACPI_SUCCESS(acpi_evaluate_object(handle, NULL, NULL, &buffer))) {
1011 obj = (union acpi_object *)buffer.pointer;
1012 if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) {
1013 printk(TPACPI_ERR "Unknown _BCL data, "
1014 "please report this to %s\n", TPACPI_MAIL);
1015 rc = 0;
1016 } else {
1017 rc = obj->package.count;
1018 }
1019 } else {
1020 return 0;
1021 }
1022
1023 kfree(buffer.pointer);
1024 return rc;
1025 }
1026
1027 static acpi_status __init tpacpi_acpi_walk_find_bcl(acpi_handle handle,
1028 u32 lvl, void *context, void **rv)
1029 {
1030 char name[ACPI_PATH_SEGMENT_LENGTH];
1031 struct acpi_buffer buffer = { sizeof(name), &name };
1032
1033 if (ACPI_SUCCESS(acpi_get_name(handle, ACPI_SINGLE_NAME, &buffer)) &&
1034 !strncmp("_BCL", name, sizeof(name) - 1)) {
1035 BUG_ON(!rv || !*rv);
1036 **(int **)rv = tpacpi_query_bcl_levels(handle);
1037 return AE_CTRL_TERMINATE;
1038 } else {
1039 return AE_OK;
1040 }
1041 }
1042
1043 /*
1044 * Returns 0 (no ACPI _BCL or _BCL invalid), or size of brightness map
1045 */
1046 static int __init tpacpi_check_std_acpi_brightness_support(void)
1047 {
1048 int status;
1049 int bcl_levels = 0;
1050 void *bcl_ptr = &bcl_levels;
1051
1052 if (!vid_handle) {
1053 TPACPI_ACPIHANDLE_INIT(vid);
1054 }
1055 if (!vid_handle)
1056 return 0;
1057
1058 /*
1059 * Search for a _BCL method, and execute it. This is safe on all
1060 * ThinkPads, and as a side-effect, _BCL will place a Lenovo Vista
1061 * BIOS in ACPI backlight control mode. We do NOT have to care
1062 * about calling the _BCL method in an enabled video device, any
1063 * will do for our purposes.
1064 */
1065
1066 status = acpi_walk_namespace(ACPI_TYPE_METHOD, vid_handle, 3,
1067 tpacpi_acpi_walk_find_bcl, NULL,
1068 &bcl_ptr);
1069
1070 if (ACPI_SUCCESS(status) && bcl_levels > 2) {
1071 tp_features.bright_acpimode = 1;
1072 return (bcl_levels - 2);
1073 }
1074
1075 return 0;
1076 }
1077
1078 static int __init tpacpi_new_rfkill(const unsigned int id,
1079 struct rfkill **rfk,
1080 const enum rfkill_type rfktype,
1081 const char *name,
1082 const bool set_default,
1083 int (*toggle_radio)(void *, enum rfkill_state),
1084 int (*get_state)(void *, enum rfkill_state *))
1085 {
1086 int res;
1087 enum rfkill_state initial_state = RFKILL_STATE_SOFT_BLOCKED;
1088
1089 res = get_state(NULL, &initial_state);
1090 if (res < 0) {
1091 printk(TPACPI_ERR
1092 "failed to read initial state for %s, error %d; "
1093 "will turn radio off\n", name, res);
1094 } else if (set_default) {
1095 /* try to set the initial state as the default for the rfkill
1096 * type, since we ask the firmware to preserve it across S5 in
1097 * NVRAM */
1098 if (rfkill_set_default(rfktype,
1099 (initial_state == RFKILL_STATE_UNBLOCKED) ?
1100 RFKILL_STATE_UNBLOCKED :
1101 RFKILL_STATE_SOFT_BLOCKED) == -EPERM)
1102 vdbg_printk(TPACPI_DBG_RFKILL,
1103 "Default state for %s cannot be changed\n",
1104 name);
1105 }
1106
1107 *rfk = rfkill_allocate(&tpacpi_pdev->dev, rfktype);
1108 if (!*rfk) {
1109 printk(TPACPI_ERR
1110 "failed to allocate memory for rfkill class\n");
1111 return -ENOMEM;
1112 }
1113
1114 (*rfk)->name = name;
1115 (*rfk)->get_state = get_state;
1116 (*rfk)->toggle_radio = toggle_radio;
1117 (*rfk)->state = initial_state;
1118
1119 res = rfkill_register(*rfk);
1120 if (res < 0) {
1121 printk(TPACPI_ERR
1122 "failed to register %s rfkill switch: %d\n",
1123 name, res);
1124 rfkill_free(*rfk);
1125 *rfk = NULL;
1126 return res;
1127 }
1128
1129 return 0;
1130 }
1131
1132 static void printk_deprecated_attribute(const char * const what,
1133 const char * const details)
1134 {
1135 tpacpi_log_usertask("deprecated sysfs attribute");
1136 printk(TPACPI_WARN "WARNING: sysfs attribute %s is deprecated and "
1137 "will be removed. %s\n",
1138 what, details);
1139 }
1140
1141 static void printk_deprecated_rfkill_attribute(const char * const what)
1142 {
1143 printk_deprecated_attribute(what,
1144 "Please switch to generic rfkill before year 2010");
1145 }
1146
1147 /*************************************************************************
1148 * thinkpad-acpi driver attributes
1149 */
1150
1151 /* interface_version --------------------------------------------------- */
1152 static ssize_t tpacpi_driver_interface_version_show(
1153 struct device_driver *drv,
1154 char *buf)
1155 {
1156 return snprintf(buf, PAGE_SIZE, "0x%08x\n", TPACPI_SYSFS_VERSION);
1157 }
1158
1159 static DRIVER_ATTR(interface_version, S_IRUGO,
1160 tpacpi_driver_interface_version_show, NULL);
1161
1162 /* debug_level --------------------------------------------------------- */
1163 static ssize_t tpacpi_driver_debug_show(struct device_driver *drv,
1164 char *buf)
1165 {
1166 return snprintf(buf, PAGE_SIZE, "0x%04x\n", dbg_level);
1167 }
1168
1169 static ssize_t tpacpi_driver_debug_store(struct device_driver *drv,
1170 const char *buf, size_t count)
1171 {
1172 unsigned long t;
1173
1174 if (parse_strtoul(buf, 0xffff, &t))
1175 return -EINVAL;
1176
1177 dbg_level = t;
1178
1179 return count;
1180 }
1181
1182 static DRIVER_ATTR(debug_level, S_IWUSR | S_IRUGO,
1183 tpacpi_driver_debug_show, tpacpi_driver_debug_store);
1184
1185 /* version ------------------------------------------------------------- */
1186 static ssize_t tpacpi_driver_version_show(struct device_driver *drv,
1187 char *buf)
1188 {
1189 return snprintf(buf, PAGE_SIZE, "%s v%s\n",
1190 TPACPI_DESC, TPACPI_VERSION);
1191 }
1192
1193 static DRIVER_ATTR(version, S_IRUGO,
1194 tpacpi_driver_version_show, NULL);
1195
1196 /* --------------------------------------------------------------------- */
1197
1198 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
1199
1200 static void tpacpi_send_radiosw_update(void);
1201
1202 /* wlsw_emulstate ------------------------------------------------------ */
1203 static ssize_t tpacpi_driver_wlsw_emulstate_show(struct device_driver *drv,
1204 char *buf)
1205 {
1206 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_wlsw_emulstate);
1207 }
1208
1209 static ssize_t tpacpi_driver_wlsw_emulstate_store(struct device_driver *drv,
1210 const char *buf, size_t count)
1211 {
1212 unsigned long t;
1213
1214 if (parse_strtoul(buf, 1, &t))
1215 return -EINVAL;
1216
1217 if (tpacpi_wlsw_emulstate != t) {
1218 tpacpi_wlsw_emulstate = !!t;
1219 tpacpi_send_radiosw_update();
1220 } else
1221 tpacpi_wlsw_emulstate = !!t;
1222
1223 return count;
1224 }
1225
1226 static DRIVER_ATTR(wlsw_emulstate, S_IWUSR | S_IRUGO,
1227 tpacpi_driver_wlsw_emulstate_show,
1228 tpacpi_driver_wlsw_emulstate_store);
1229
1230 /* bluetooth_emulstate ------------------------------------------------- */
1231 static ssize_t tpacpi_driver_bluetooth_emulstate_show(
1232 struct device_driver *drv,
1233 char *buf)
1234 {
1235 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_bluetooth_emulstate);
1236 }
1237
1238 static ssize_t tpacpi_driver_bluetooth_emulstate_store(
1239 struct device_driver *drv,
1240 const char *buf, size_t count)
1241 {
1242 unsigned long t;
1243
1244 if (parse_strtoul(buf, 1, &t))
1245 return -EINVAL;
1246
1247 tpacpi_bluetooth_emulstate = !!t;
1248
1249 return count;
1250 }
1251
1252 static DRIVER_ATTR(bluetooth_emulstate, S_IWUSR | S_IRUGO,
1253 tpacpi_driver_bluetooth_emulstate_show,
1254 tpacpi_driver_bluetooth_emulstate_store);
1255
1256 /* wwan_emulstate ------------------------------------------------- */
1257 static ssize_t tpacpi_driver_wwan_emulstate_show(
1258 struct device_driver *drv,
1259 char *buf)
1260 {
1261 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_wwan_emulstate);
1262 }
1263
1264 static ssize_t tpacpi_driver_wwan_emulstate_store(
1265 struct device_driver *drv,
1266 const char *buf, size_t count)
1267 {
1268 unsigned long t;
1269
1270 if (parse_strtoul(buf, 1, &t))
1271 return -EINVAL;
1272
1273 tpacpi_wwan_emulstate = !!t;
1274
1275 return count;
1276 }
1277
1278 static DRIVER_ATTR(wwan_emulstate, S_IWUSR | S_IRUGO,
1279 tpacpi_driver_wwan_emulstate_show,
1280 tpacpi_driver_wwan_emulstate_store);
1281
1282 /* uwb_emulstate ------------------------------------------------- */
1283 static ssize_t tpacpi_driver_uwb_emulstate_show(
1284 struct device_driver *drv,
1285 char *buf)
1286 {
1287 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_uwb_emulstate);
1288 }
1289
1290 static ssize_t tpacpi_driver_uwb_emulstate_store(
1291 struct device_driver *drv,
1292 const char *buf, size_t count)
1293 {
1294 unsigned long t;
1295
1296 if (parse_strtoul(buf, 1, &t))
1297 return -EINVAL;
1298
1299 tpacpi_uwb_emulstate = !!t;
1300
1301 return count;
1302 }
1303
1304 static DRIVER_ATTR(uwb_emulstate, S_IWUSR | S_IRUGO,
1305 tpacpi_driver_uwb_emulstate_show,
1306 tpacpi_driver_uwb_emulstate_store);
1307 #endif
1308
1309 /* --------------------------------------------------------------------- */
1310
1311 static struct driver_attribute *tpacpi_driver_attributes[] = {
1312 &driver_attr_debug_level, &driver_attr_version,
1313 &driver_attr_interface_version,
1314 };
1315
1316 static int __init tpacpi_create_driver_attributes(struct device_driver *drv)
1317 {
1318 int i, res;
1319
1320 i = 0;
1321 res = 0;
1322 while (!res && i < ARRAY_SIZE(tpacpi_driver_attributes)) {
1323 res = driver_create_file(drv, tpacpi_driver_attributes[i]);
1324 i++;
1325 }
1326
1327 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
1328 if (!res && dbg_wlswemul)
1329 res = driver_create_file(drv, &driver_attr_wlsw_emulstate);
1330 if (!res && dbg_bluetoothemul)
1331 res = driver_create_file(drv, &driver_attr_bluetooth_emulstate);
1332 if (!res && dbg_wwanemul)
1333 res = driver_create_file(drv, &driver_attr_wwan_emulstate);
1334 if (!res && dbg_uwbemul)
1335 res = driver_create_file(drv, &driver_attr_uwb_emulstate);
1336 #endif
1337
1338 return res;
1339 }
1340
1341 static void tpacpi_remove_driver_attributes(struct device_driver *drv)
1342 {
1343 int i;
1344
1345 for (i = 0; i < ARRAY_SIZE(tpacpi_driver_attributes); i++)
1346 driver_remove_file(drv, tpacpi_driver_attributes[i]);
1347
1348 #ifdef THINKPAD_ACPI_DEBUGFACILITIES
1349 driver_remove_file(drv, &driver_attr_wlsw_emulstate);
1350 driver_remove_file(drv, &driver_attr_bluetooth_emulstate);
1351 driver_remove_file(drv, &driver_attr_wwan_emulstate);
1352 driver_remove_file(drv, &driver_attr_uwb_emulstate);
1353 #endif
1354 }
1355
1356 /****************************************************************************
1357 ****************************************************************************
1358 *
1359 * Subdrivers
1360 *
1361 ****************************************************************************
1362 ****************************************************************************/
1363
1364 /*************************************************************************
1365 * thinkpad-acpi init subdriver
1366 */
1367
1368 static int __init thinkpad_acpi_driver_init(struct ibm_init_struct *iibm)
1369 {
1370 printk(TPACPI_INFO "%s v%s\n", TPACPI_DESC, TPACPI_VERSION);
1371 printk(TPACPI_INFO "%s\n", TPACPI_URL);
1372
1373 printk(TPACPI_INFO "ThinkPad BIOS %s, EC %s\n",
1374 (thinkpad_id.bios_version_str) ?
1375 thinkpad_id.bios_version_str : "unknown",
1376 (thinkpad_id.ec_version_str) ?
1377 thinkpad_id.ec_version_str : "unknown");
1378
1379 if (thinkpad_id.vendor && thinkpad_id.model_str)
1380 printk(TPACPI_INFO "%s %s, model %s\n",
1381 (thinkpad_id.vendor == PCI_VENDOR_ID_IBM) ?
1382 "IBM" : ((thinkpad_id.vendor ==
1383 PCI_VENDOR_ID_LENOVO) ?
1384 "Lenovo" : "Unknown vendor"),
1385 thinkpad_id.model_str,
1386 (thinkpad_id.nummodel_str) ?
1387 thinkpad_id.nummodel_str : "unknown");
1388
1389 return 0;
1390 }
1391
1392 static int thinkpad_acpi_driver_read(char *p)
1393 {
1394 int len = 0;
1395
1396 len += sprintf(p + len, "driver:\t\t%s\n", TPACPI_DESC);
1397 len += sprintf(p + len, "version:\t%s\n", TPACPI_VERSION);
1398
1399 return len;
1400 }
1401
1402 static struct ibm_struct thinkpad_acpi_driver_data = {
1403 .name = "driver",
1404 .read = thinkpad_acpi_driver_read,
1405 };
1406
1407 /*************************************************************************
1408 * Hotkey subdriver
1409 */
1410
1411 enum { /* hot key scan codes (derived from ACPI DSDT) */
1412 TP_ACPI_HOTKEYSCAN_FNF1 = 0,
1413 TP_ACPI_HOTKEYSCAN_FNF2,
1414 TP_ACPI_HOTKEYSCAN_FNF3,
1415 TP_ACPI_HOTKEYSCAN_FNF4,
1416 TP_ACPI_HOTKEYSCAN_FNF5,
1417 TP_ACPI_HOTKEYSCAN_FNF6,
1418 TP_ACPI_HOTKEYSCAN_FNF7,
1419 TP_ACPI_HOTKEYSCAN_FNF8,
1420 TP_ACPI_HOTKEYSCAN_FNF9,
1421 TP_ACPI_HOTKEYSCAN_FNF10,
1422 TP_ACPI_HOTKEYSCAN_FNF11,
1423 TP_ACPI_HOTKEYSCAN_FNF12,
1424 TP_ACPI_HOTKEYSCAN_FNBACKSPACE,
1425 TP_ACPI_HOTKEYSCAN_FNINSERT,
1426 TP_ACPI_HOTKEYSCAN_FNDELETE,
1427 TP_ACPI_HOTKEYSCAN_FNHOME,
1428 TP_ACPI_HOTKEYSCAN_FNEND,
1429 TP_ACPI_HOTKEYSCAN_FNPAGEUP,
1430 TP_ACPI_HOTKEYSCAN_FNPAGEDOWN,
1431 TP_ACPI_HOTKEYSCAN_FNSPACE,
1432 TP_ACPI_HOTKEYSCAN_VOLUMEUP,
1433 TP_ACPI_HOTKEYSCAN_VOLUMEDOWN,
1434 TP_ACPI_HOTKEYSCAN_MUTE,
1435 TP_ACPI_HOTKEYSCAN_THINKPAD,
1436 };
1437
1438 enum { /* Keys available through NVRAM polling */
1439 TPACPI_HKEY_NVRAM_KNOWN_MASK = 0x00fb88c0U,
1440 TPACPI_HKEY_NVRAM_GOOD_MASK = 0x00fb8000U,
1441 };
1442
1443 enum { /* Positions of some of the keys in hotkey masks */
1444 TP_ACPI_HKEY_DISPSWTCH_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF7,
1445 TP_ACPI_HKEY_DISPXPAND_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF8,
1446 TP_ACPI_HKEY_HIBERNATE_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF12,
1447 TP_ACPI_HKEY_BRGHTUP_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNHOME,
1448 TP_ACPI_HKEY_BRGHTDWN_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNEND,
1449 TP_ACPI_HKEY_THNKLGHT_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNPAGEUP,
1450 TP_ACPI_HKEY_ZOOM_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNSPACE,
1451 TP_ACPI_HKEY_VOLUP_MASK = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEUP,
1452 TP_ACPI_HKEY_VOLDWN_MASK = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEDOWN,
1453 TP_ACPI_HKEY_MUTE_MASK = 1 << TP_ACPI_HOTKEYSCAN_MUTE,
1454 TP_ACPI_HKEY_THINKPAD_MASK = 1 << TP_ACPI_HOTKEYSCAN_THINKPAD,
1455 };
1456
1457 enum { /* NVRAM to ACPI HKEY group map */
1458 TP_NVRAM_HKEY_GROUP_HK2 = TP_ACPI_HKEY_THINKPAD_MASK |
1459 TP_ACPI_HKEY_ZOOM_MASK |
1460 TP_ACPI_HKEY_DISPSWTCH_MASK |
1461 TP_ACPI_HKEY_HIBERNATE_MASK,
1462 TP_NVRAM_HKEY_GROUP_BRIGHTNESS = TP_ACPI_HKEY_BRGHTUP_MASK |
1463 TP_ACPI_HKEY_BRGHTDWN_MASK,
1464 TP_NVRAM_HKEY_GROUP_VOLUME = TP_ACPI_HKEY_VOLUP_MASK |
1465 TP_ACPI_HKEY_VOLDWN_MASK |
1466 TP_ACPI_HKEY_MUTE_MASK,
1467 };
1468
1469 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1470 struct tp_nvram_state {
1471 u16 thinkpad_toggle:1;
1472 u16 zoom_toggle:1;
1473 u16 display_toggle:1;
1474 u16 thinklight_toggle:1;
1475 u16 hibernate_toggle:1;
1476 u16 displayexp_toggle:1;
1477 u16 display_state:1;
1478 u16 brightness_toggle:1;
1479 u16 volume_toggle:1;
1480 u16 mute:1;
1481
1482 u8 brightness_level;
1483 u8 volume_level;
1484 };
1485
1486 static struct task_struct *tpacpi_hotkey_task;
1487 static u32 hotkey_source_mask; /* bit mask 0=ACPI,1=NVRAM */
1488 static int hotkey_poll_freq = 10; /* Hz */
1489 static struct mutex hotkey_thread_mutex;
1490 static struct mutex hotkey_thread_data_mutex;
1491 static unsigned int hotkey_config_change;
1492
1493 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1494
1495 #define hotkey_source_mask 0U
1496
1497 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1498
1499 static struct mutex hotkey_mutex;
1500
1501 static enum { /* Reasons for waking up */
1502 TP_ACPI_WAKEUP_NONE = 0, /* None or unknown */
1503 TP_ACPI_WAKEUP_BAYEJ, /* Bay ejection request */
1504 TP_ACPI_WAKEUP_UNDOCK, /* Undock request */
1505 } hotkey_wakeup_reason;
1506
1507 static int hotkey_autosleep_ack;
1508
1509 static u32 hotkey_orig_mask;
1510 static u32 hotkey_all_mask;
1511 static u32 hotkey_reserved_mask;
1512 static u32 hotkey_mask;
1513
1514 static unsigned int hotkey_report_mode;
1515
1516 static u16 *hotkey_keycode_map;
1517
1518 static struct attribute_set *hotkey_dev_attributes;
1519
1520 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1521 #define HOTKEY_CONFIG_CRITICAL_START \
1522 do { \
1523 mutex_lock(&hotkey_thread_data_mutex); \
1524 hotkey_config_change++; \
1525 } while (0);
1526 #define HOTKEY_CONFIG_CRITICAL_END \
1527 mutex_unlock(&hotkey_thread_data_mutex);
1528 #else
1529 #define HOTKEY_CONFIG_CRITICAL_START
1530 #define HOTKEY_CONFIG_CRITICAL_END
1531 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1532
1533 /* HKEY.MHKG() return bits */
1534 #define TP_HOTKEY_TABLET_MASK (1 << 3)
1535
1536 static int hotkey_get_wlsw(int *status)
1537 {
1538 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
1539 if (dbg_wlswemul) {
1540 *status = !!tpacpi_wlsw_emulstate;
1541 return 0;
1542 }
1543 #endif
1544 if (!acpi_evalf(hkey_handle, status, "WLSW", "d"))
1545 return -EIO;
1546 return 0;
1547 }
1548
1549 static int hotkey_get_tablet_mode(int *status)
1550 {
1551 int s;
1552
1553 if (!acpi_evalf(hkey_handle, &s, "MHKG", "d"))
1554 return -EIO;
1555
1556 *status = ((s & TP_HOTKEY_TABLET_MASK) != 0);
1557 return 0;
1558 }
1559
1560 /*
1561 * Call with hotkey_mutex held
1562 */
1563 static int hotkey_mask_get(void)
1564 {
1565 u32 m = 0;
1566
1567 if (tp_features.hotkey_mask) {
1568 if (!acpi_evalf(hkey_handle, &m, "DHKN", "d"))
1569 return -EIO;
1570 }
1571 hotkey_mask = m | (hotkey_source_mask & hotkey_mask);
1572
1573 return 0;
1574 }
1575
1576 /*
1577 * Call with hotkey_mutex held
1578 */
1579 static int hotkey_mask_set(u32 mask)
1580 {
1581 int i;
1582 int rc = 0;
1583
1584 if (tp_features.hotkey_mask) {
1585 if (!tp_warned.hotkey_mask_ff &&
1586 (mask == 0xffff || mask == 0xffffff ||
1587 mask == 0xffffffff)) {
1588 tp_warned.hotkey_mask_ff = 1;
1589 printk(TPACPI_NOTICE
1590 "setting the hotkey mask to 0x%08x is likely "
1591 "not the best way to go about it\n", mask);
1592 printk(TPACPI_NOTICE
1593 "please consider using the driver defaults, "
1594 "and refer to up-to-date thinkpad-acpi "
1595 "documentation\n");
1596 }
1597
1598 HOTKEY_CONFIG_CRITICAL_START
1599 for (i = 0; i < 32; i++) {
1600 u32 m = 1 << i;
1601 /* enable in firmware mask only keys not in NVRAM
1602 * mode, but enable the key in the cached hotkey_mask
1603 * regardless of mode, or the key will end up
1604 * disabled by hotkey_mask_get() */
1605 if (!acpi_evalf(hkey_handle,
1606 NULL, "MHKM", "vdd", i + 1,
1607 !!((mask & ~hotkey_source_mask) & m))) {
1608 rc = -EIO;
1609 break;
1610 } else {
1611 hotkey_mask = (hotkey_mask & ~m) | (mask & m);
1612 }
1613 }
1614 HOTKEY_CONFIG_CRITICAL_END
1615
1616 /* hotkey_mask_get must be called unconditionally below */
1617 if (!hotkey_mask_get() && !rc &&
1618 (hotkey_mask & ~hotkey_source_mask) !=
1619 (mask & ~hotkey_source_mask)) {
1620 printk(TPACPI_NOTICE
1621 "requested hot key mask 0x%08x, but "
1622 "firmware forced it to 0x%08x\n",
1623 mask, hotkey_mask);
1624 }
1625 } else {
1626 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1627 HOTKEY_CONFIG_CRITICAL_START
1628 hotkey_mask = mask & hotkey_source_mask;
1629 HOTKEY_CONFIG_CRITICAL_END
1630 hotkey_mask_get();
1631 if (hotkey_mask != mask) {
1632 printk(TPACPI_NOTICE
1633 "requested hot key mask 0x%08x, "
1634 "forced to 0x%08x (NVRAM poll mask is "
1635 "0x%08x): no firmware mask support\n",
1636 mask, hotkey_mask, hotkey_source_mask);
1637 }
1638 #else
1639 hotkey_mask_get();
1640 rc = -ENXIO;
1641 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1642 }
1643
1644 return rc;
1645 }
1646
1647 static int hotkey_status_get(int *status)
1648 {
1649 if (!acpi_evalf(hkey_handle, status, "DHKC", "d"))
1650 return -EIO;
1651
1652 return 0;
1653 }
1654
1655 static int hotkey_status_set(bool enable)
1656 {
1657 if (!acpi_evalf(hkey_handle, NULL, "MHKC", "vd", enable ? 1 : 0))
1658 return -EIO;
1659
1660 return 0;
1661 }
1662
1663 static void tpacpi_input_send_tabletsw(void)
1664 {
1665 int state;
1666
1667 if (tp_features.hotkey_tablet &&
1668 !hotkey_get_tablet_mode(&state)) {
1669 mutex_lock(&tpacpi_inputdev_send_mutex);
1670
1671 input_report_switch(tpacpi_inputdev,
1672 SW_TABLET_MODE, !!state);
1673 input_sync(tpacpi_inputdev);
1674
1675 mutex_unlock(&tpacpi_inputdev_send_mutex);
1676 }
1677 }
1678
1679 static void tpacpi_input_send_key(unsigned int scancode)
1680 {
1681 unsigned int keycode;
1682
1683 keycode = hotkey_keycode_map[scancode];
1684
1685 if (keycode != KEY_RESERVED) {
1686 mutex_lock(&tpacpi_inputdev_send_mutex);
1687
1688 input_report_key(tpacpi_inputdev, keycode, 1);
1689 if (keycode == KEY_UNKNOWN)
1690 input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN,
1691 scancode);
1692 input_sync(tpacpi_inputdev);
1693
1694 input_report_key(tpacpi_inputdev, keycode, 0);
1695 if (keycode == KEY_UNKNOWN)
1696 input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN,
1697 scancode);
1698 input_sync(tpacpi_inputdev);
1699
1700 mutex_unlock(&tpacpi_inputdev_send_mutex);
1701 }
1702 }
1703
1704 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1705 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver;
1706
1707 static void tpacpi_hotkey_send_key(unsigned int scancode)
1708 {
1709 tpacpi_input_send_key(scancode);
1710 if (hotkey_report_mode < 2) {
1711 acpi_bus_generate_proc_event(ibm_hotkey_acpidriver.device,
1712 0x80, 0x1001 + scancode);
1713 }
1714 }
1715
1716 static void hotkey_read_nvram(struct tp_nvram_state *n, u32 m)
1717 {
1718 u8 d;
1719
1720 if (m & TP_NVRAM_HKEY_GROUP_HK2) {
1721 d = nvram_read_byte(TP_NVRAM_ADDR_HK2);
1722 n->thinkpad_toggle = !!(d & TP_NVRAM_MASK_HKT_THINKPAD);
1723 n->zoom_toggle = !!(d & TP_NVRAM_MASK_HKT_ZOOM);
1724 n->display_toggle = !!(d & TP_NVRAM_MASK_HKT_DISPLAY);
1725 n->hibernate_toggle = !!(d & TP_NVRAM_MASK_HKT_HIBERNATE);
1726 }
1727 if (m & TP_ACPI_HKEY_THNKLGHT_MASK) {
1728 d = nvram_read_byte(TP_NVRAM_ADDR_THINKLIGHT);
1729 n->thinklight_toggle = !!(d & TP_NVRAM_MASK_THINKLIGHT);
1730 }
1731 if (m & TP_ACPI_HKEY_DISPXPAND_MASK) {
1732 d = nvram_read_byte(TP_NVRAM_ADDR_VIDEO);
1733 n->displayexp_toggle =
1734 !!(d & TP_NVRAM_MASK_HKT_DISPEXPND);
1735 }
1736 if (m & TP_NVRAM_HKEY_GROUP_BRIGHTNESS) {
1737 d = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS);
1738 n->brightness_level = (d & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
1739 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
1740 n->brightness_toggle =
1741 !!(d & TP_NVRAM_MASK_HKT_BRIGHTNESS);
1742 }
1743 if (m & TP_NVRAM_HKEY_GROUP_VOLUME) {
1744 d = nvram_read_byte(TP_NVRAM_ADDR_MIXER);
1745 n->volume_level = (d & TP_NVRAM_MASK_LEVEL_VOLUME)
1746 >> TP_NVRAM_POS_LEVEL_VOLUME;
1747 n->mute = !!(d & TP_NVRAM_MASK_MUTE);
1748 n->volume_toggle = !!(d & TP_NVRAM_MASK_HKT_VOLUME);
1749 }
1750 }
1751
1752 #define TPACPI_COMPARE_KEY(__scancode, __member) \
1753 do { \
1754 if ((mask & (1 << __scancode)) && \
1755 oldn->__member != newn->__member) \
1756 tpacpi_hotkey_send_key(__scancode); \
1757 } while (0)
1758
1759 #define TPACPI_MAY_SEND_KEY(__scancode) \
1760 do { if (mask & (1 << __scancode)) \
1761 tpacpi_hotkey_send_key(__scancode); } while (0)
1762
1763 static void hotkey_compare_and_issue_event(struct tp_nvram_state *oldn,
1764 struct tp_nvram_state *newn,
1765 u32 mask)
1766 {
1767 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_THINKPAD, thinkpad_toggle);
1768 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNSPACE, zoom_toggle);
1769 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF7, display_toggle);
1770 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF12, hibernate_toggle);
1771
1772 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNPAGEUP, thinklight_toggle);
1773
1774 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF8, displayexp_toggle);
1775
1776 /* handle volume */
1777 if (oldn->volume_toggle != newn->volume_toggle) {
1778 if (oldn->mute != newn->mute) {
1779 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE);
1780 }
1781 if (oldn->volume_level > newn->volume_level) {
1782 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
1783 } else if (oldn->volume_level < newn->volume_level) {
1784 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
1785 } else if (oldn->mute == newn->mute) {
1786 /* repeated key presses that didn't change state */
1787 if (newn->mute) {
1788 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE);
1789 } else if (newn->volume_level != 0) {
1790 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
1791 } else {
1792 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
1793 }
1794 }
1795 }
1796
1797 /* handle brightness */
1798 if (oldn->brightness_toggle != newn->brightness_toggle) {
1799 if (oldn->brightness_level < newn->brightness_level) {
1800 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
1801 } else if (oldn->brightness_level > newn->brightness_level) {
1802 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
1803 } else {
1804 /* repeated key presses that didn't change state */
1805 if (newn->brightness_level != 0) {
1806 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
1807 } else {
1808 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
1809 }
1810 }
1811 }
1812 }
1813
1814 #undef TPACPI_COMPARE_KEY
1815 #undef TPACPI_MAY_SEND_KEY
1816
1817 static int hotkey_kthread(void *data)
1818 {
1819 struct tp_nvram_state s[2];
1820 u32 mask;
1821 unsigned int si, so;
1822 unsigned long t;
1823 unsigned int change_detector, must_reset;
1824
1825 mutex_lock(&hotkey_thread_mutex);
1826
1827 if (tpacpi_lifecycle == TPACPI_LIFE_EXITING)
1828 goto exit;
1829
1830 set_freezable();
1831
1832 so = 0;
1833 si = 1;
1834 t = 0;
1835
1836 /* Initial state for compares */
1837 mutex_lock(&hotkey_thread_data_mutex);
1838 change_detector = hotkey_config_change;
1839 mask = hotkey_source_mask & hotkey_mask;
1840 mutex_unlock(&hotkey_thread_data_mutex);
1841 hotkey_read_nvram(&s[so], mask);
1842
1843 while (!kthread_should_stop() && hotkey_poll_freq) {
1844 if (t == 0)
1845 t = 1000/hotkey_poll_freq;
1846 t = msleep_interruptible(t);
1847 if (unlikely(kthread_should_stop()))
1848 break;
1849 must_reset = try_to_freeze();
1850 if (t > 0 && !must_reset)
1851 continue;
1852
1853 mutex_lock(&hotkey_thread_data_mutex);
1854 if (must_reset || hotkey_config_change != change_detector) {
1855 /* forget old state on thaw or config change */
1856 si = so;
1857 t = 0;
1858 change_detector = hotkey_config_change;
1859 }
1860 mask = hotkey_source_mask & hotkey_mask;
1861 mutex_unlock(&hotkey_thread_data_mutex);
1862
1863 if (likely(mask)) {
1864 hotkey_read_nvram(&s[si], mask);
1865 if (likely(si != so)) {
1866 hotkey_compare_and_issue_event(&s[so], &s[si],
1867 mask);
1868 }
1869 }
1870
1871 so = si;
1872 si ^= 1;
1873 }
1874
1875 exit:
1876 mutex_unlock(&hotkey_thread_mutex);
1877 return 0;
1878 }
1879
1880 static void hotkey_poll_stop_sync(void)
1881 {
1882 if (tpacpi_hotkey_task) {
1883 if (frozen(tpacpi_hotkey_task) ||
1884 freezing(tpacpi_hotkey_task))
1885 thaw_process(tpacpi_hotkey_task);
1886
1887 kthread_stop(tpacpi_hotkey_task);
1888 tpacpi_hotkey_task = NULL;
1889 mutex_lock(&hotkey_thread_mutex);
1890 /* at this point, the thread did exit */
1891 mutex_unlock(&hotkey_thread_mutex);
1892 }
1893 }
1894
1895 /* call with hotkey_mutex held */
1896 static void hotkey_poll_setup(int may_warn)
1897 {
1898 if ((hotkey_source_mask & hotkey_mask) != 0 &&
1899 hotkey_poll_freq > 0 &&
1900 (tpacpi_inputdev->users > 0 || hotkey_report_mode < 2)) {
1901 if (!tpacpi_hotkey_task) {
1902 tpacpi_hotkey_task = kthread_run(hotkey_kthread,
1903 NULL, TPACPI_NVRAM_KTHREAD_NAME);
1904 if (IS_ERR(tpacpi_hotkey_task)) {
1905 tpacpi_hotkey_task = NULL;
1906 printk(TPACPI_ERR
1907 "could not create kernel thread "
1908 "for hotkey polling\n");
1909 }
1910 }
1911 } else {
1912 hotkey_poll_stop_sync();
1913 if (may_warn &&
1914 hotkey_source_mask != 0 && hotkey_poll_freq == 0) {
1915 printk(TPACPI_NOTICE
1916 "hot keys 0x%08x require polling, "
1917 "which is currently disabled\n",
1918 hotkey_source_mask);
1919 }
1920 }
1921 }
1922
1923 static void hotkey_poll_setup_safe(int may_warn)
1924 {
1925 mutex_lock(&hotkey_mutex);
1926 hotkey_poll_setup(may_warn);
1927 mutex_unlock(&hotkey_mutex);
1928 }
1929
1930 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1931
1932 static void hotkey_poll_setup_safe(int __unused)
1933 {
1934 }
1935
1936 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1937
1938 static int hotkey_inputdev_open(struct input_dev *dev)
1939 {
1940 switch (tpacpi_lifecycle) {
1941 case TPACPI_LIFE_INIT:
1942 /*
1943 * hotkey_init will call hotkey_poll_setup_safe
1944 * at the appropriate moment
1945 */
1946 return 0;
1947 case TPACPI_LIFE_EXITING:
1948 return -EBUSY;
1949 case TPACPI_LIFE_RUNNING:
1950 hotkey_poll_setup_safe(0);
1951 return 0;
1952 }
1953
1954 /* Should only happen if tpacpi_lifecycle is corrupt */
1955 BUG();
1956 return -EBUSY;
1957 }
1958
1959 static void hotkey_inputdev_close(struct input_dev *dev)
1960 {
1961 /* disable hotkey polling when possible */
1962 if (tpacpi_lifecycle == TPACPI_LIFE_RUNNING)
1963 hotkey_poll_setup_safe(0);
1964 }
1965
1966 /* sysfs hotkey enable ------------------------------------------------- */
1967 static ssize_t hotkey_enable_show(struct device *dev,
1968 struct device_attribute *attr,
1969 char *buf)
1970 {
1971 int res, status;
1972
1973 printk_deprecated_attribute("hotkey_enable",
1974 "Hotkey reporting is always enabled");
1975
1976 res = hotkey_status_get(&status);
1977 if (res)
1978 return res;
1979
1980 return snprintf(buf, PAGE_SIZE, "%d\n", status);
1981 }
1982
1983 static ssize_t hotkey_enable_store(struct device *dev,
1984 struct device_attribute *attr,
1985 const char *buf, size_t count)
1986 {
1987 unsigned long t;
1988
1989 printk_deprecated_attribute("hotkey_enable",
1990 "Hotkeys can be disabled through hotkey_mask");
1991
1992 if (parse_strtoul(buf, 1, &t))
1993 return -EINVAL;
1994
1995 if (t == 0)
1996 return -EPERM;
1997
1998 return count;
1999 }
2000
2001 static struct device_attribute dev_attr_hotkey_enable =
2002 __ATTR(hotkey_enable, S_IWUSR | S_IRUGO,
2003 hotkey_enable_show, hotkey_enable_store);
2004
2005 /* sysfs hotkey mask --------------------------------------------------- */
2006 static ssize_t hotkey_mask_show(struct device *dev,
2007 struct device_attribute *attr,
2008 char *buf)
2009 {
2010 int res;
2011
2012 if (mutex_lock_killable(&hotkey_mutex))
2013 return -ERESTARTSYS;
2014 res = hotkey_mask_get();
2015 mutex_unlock(&hotkey_mutex);
2016
2017 return (res)?
2018 res : snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_mask);
2019 }
2020
2021 static ssize_t hotkey_mask_store(struct device *dev,
2022 struct device_attribute *attr,
2023 const char *buf, size_t count)
2024 {
2025 unsigned long t;
2026 int res;
2027
2028 if (parse_strtoul(buf, 0xffffffffUL, &t))
2029 return -EINVAL;
2030
2031 if (mutex_lock_killable(&hotkey_mutex))
2032 return -ERESTARTSYS;
2033
2034 res = hotkey_mask_set(t);
2035
2036 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2037 hotkey_poll_setup(1);
2038 #endif
2039
2040 mutex_unlock(&hotkey_mutex);
2041
2042 tpacpi_disclose_usertask("hotkey_mask", "set to 0x%08lx\n", t);
2043
2044 return (res) ? res : count;
2045 }
2046
2047 static struct device_attribute dev_attr_hotkey_mask =
2048 __ATTR(hotkey_mask, S_IWUSR | S_IRUGO,
2049 hotkey_mask_show, hotkey_mask_store);
2050
2051 /* sysfs hotkey bios_enabled ------------------------------------------- */
2052 static ssize_t hotkey_bios_enabled_show(struct device *dev,
2053 struct device_attribute *attr,
2054 char *buf)
2055 {
2056 return sprintf(buf, "0\n");
2057 }
2058
2059 static struct device_attribute dev_attr_hotkey_bios_enabled =
2060 __ATTR(hotkey_bios_enabled, S_IRUGO, hotkey_bios_enabled_show, NULL);
2061
2062 /* sysfs hotkey bios_mask ---------------------------------------------- */
2063 static ssize_t hotkey_bios_mask_show(struct device *dev,
2064 struct device_attribute *attr,
2065 char *buf)
2066 {
2067 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_orig_mask);
2068 }
2069
2070 static struct device_attribute dev_attr_hotkey_bios_mask =
2071 __ATTR(hotkey_bios_mask, S_IRUGO, hotkey_bios_mask_show, NULL);
2072
2073 /* sysfs hotkey all_mask ----------------------------------------------- */
2074 static ssize_t hotkey_all_mask_show(struct device *dev,
2075 struct device_attribute *attr,
2076 char *buf)
2077 {
2078 return snprintf(buf, PAGE_SIZE, "0x%08x\n",
2079 hotkey_all_mask | hotkey_source_mask);
2080 }
2081
2082 static struct device_attribute dev_attr_hotkey_all_mask =
2083 __ATTR(hotkey_all_mask, S_IRUGO, hotkey_all_mask_show, NULL);
2084
2085 /* sysfs hotkey recommended_mask --------------------------------------- */
2086 static ssize_t hotkey_recommended_mask_show(struct device *dev,
2087 struct device_attribute *attr,
2088 char *buf)
2089 {
2090 return snprintf(buf, PAGE_SIZE, "0x%08x\n",
2091 (hotkey_all_mask | hotkey_source_mask)
2092 & ~hotkey_reserved_mask);
2093 }
2094
2095 static struct device_attribute dev_attr_hotkey_recommended_mask =
2096 __ATTR(hotkey_recommended_mask, S_IRUGO,
2097 hotkey_recommended_mask_show, NULL);
2098
2099 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2100
2101 /* sysfs hotkey hotkey_source_mask ------------------------------------- */
2102 static ssize_t hotkey_source_mask_show(struct device *dev,
2103 struct device_attribute *attr,
2104 char *buf)
2105 {
2106 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_source_mask);
2107 }
2108
2109 static ssize_t hotkey_source_mask_store(struct device *dev,
2110 struct device_attribute *attr,
2111 const char *buf, size_t count)
2112 {
2113 unsigned long t;
2114
2115 if (parse_strtoul(buf, 0xffffffffUL, &t) ||
2116 ((t & ~TPACPI_HKEY_NVRAM_KNOWN_MASK) != 0))
2117 return -EINVAL;
2118
2119 if (mutex_lock_killable(&hotkey_mutex))
2120 return -ERESTARTSYS;
2121
2122 HOTKEY_CONFIG_CRITICAL_START
2123 hotkey_source_mask = t;
2124 HOTKEY_CONFIG_CRITICAL_END
2125
2126 hotkey_poll_setup(1);
2127
2128 mutex_unlock(&hotkey_mutex);
2129
2130 tpacpi_disclose_usertask("hotkey_source_mask", "set to 0x%08lx\n", t);
2131
2132 return count;
2133 }
2134
2135 static struct device_attribute dev_attr_hotkey_source_mask =
2136 __ATTR(hotkey_source_mask, S_IWUSR | S_IRUGO,
2137 hotkey_source_mask_show, hotkey_source_mask_store);
2138
2139 /* sysfs hotkey hotkey_poll_freq --------------------------------------- */
2140 static ssize_t hotkey_poll_freq_show(struct device *dev,
2141 struct device_attribute *attr,
2142 char *buf)
2143 {
2144 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_poll_freq);
2145 }
2146
2147 static ssize_t hotkey_poll_freq_store(struct device *dev,
2148 struct device_attribute *attr,
2149 const char *buf, size_t count)
2150 {
2151 unsigned long t;
2152
2153 if (parse_strtoul(buf, 25, &t))
2154 return -EINVAL;
2155
2156 if (mutex_lock_killable(&hotkey_mutex))
2157 return -ERESTARTSYS;
2158
2159 hotkey_poll_freq = t;
2160
2161 hotkey_poll_setup(1);
2162 mutex_unlock(&hotkey_mutex);
2163
2164 tpacpi_disclose_usertask("hotkey_poll_freq", "set to %lu\n", t);
2165
2166 return count;
2167 }
2168
2169 static struct device_attribute dev_attr_hotkey_poll_freq =
2170 __ATTR(hotkey_poll_freq, S_IWUSR | S_IRUGO,
2171 hotkey_poll_freq_show, hotkey_poll_freq_store);
2172
2173 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2174
2175 /* sysfs hotkey radio_sw (pollable) ------------------------------------ */
2176 static ssize_t hotkey_radio_sw_show(struct device *dev,
2177 struct device_attribute *attr,
2178 char *buf)
2179 {
2180 int res, s;
2181 res = hotkey_get_wlsw(&s);
2182 if (res < 0)
2183 return res;
2184
2185 return snprintf(buf, PAGE_SIZE, "%d\n", !!s);
2186 }
2187
2188 static struct device_attribute dev_attr_hotkey_radio_sw =
2189 __ATTR(hotkey_radio_sw, S_IRUGO, hotkey_radio_sw_show, NULL);
2190
2191 static void hotkey_radio_sw_notify_change(void)
2192 {
2193 if (tp_features.hotkey_wlsw)
2194 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2195 "hotkey_radio_sw");
2196 }
2197
2198 /* sysfs hotkey tablet mode (pollable) --------------------------------- */
2199 static ssize_t hotkey_tablet_mode_show(struct device *dev,
2200 struct device_attribute *attr,
2201 char *buf)
2202 {
2203 int res, s;
2204 res = hotkey_get_tablet_mode(&s);
2205 if (res < 0)
2206 return res;
2207
2208 return snprintf(buf, PAGE_SIZE, "%d\n", !!s);
2209 }
2210
2211 static struct device_attribute dev_attr_hotkey_tablet_mode =
2212 __ATTR(hotkey_tablet_mode, S_IRUGO, hotkey_tablet_mode_show, NULL);
2213
2214 static void hotkey_tablet_mode_notify_change(void)
2215 {
2216 if (tp_features.hotkey_tablet)
2217 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2218 "hotkey_tablet_mode");
2219 }
2220
2221 /* sysfs hotkey report_mode -------------------------------------------- */
2222 static ssize_t hotkey_report_mode_show(struct device *dev,
2223 struct device_attribute *attr,
2224 char *buf)
2225 {
2226 return snprintf(buf, PAGE_SIZE, "%d\n",
2227 (hotkey_report_mode != 0) ? hotkey_report_mode : 1);
2228 }
2229
2230 static struct device_attribute dev_attr_hotkey_report_mode =
2231 __ATTR(hotkey_report_mode, S_IRUGO, hotkey_report_mode_show, NULL);
2232
2233 /* sysfs wakeup reason (pollable) -------------------------------------- */
2234 static ssize_t hotkey_wakeup_reason_show(struct device *dev,
2235 struct device_attribute *attr,
2236 char *buf)
2237 {
2238 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_wakeup_reason);
2239 }
2240
2241 static struct device_attribute dev_attr_hotkey_wakeup_reason =
2242 __ATTR(wakeup_reason, S_IRUGO, hotkey_wakeup_reason_show, NULL);
2243
2244 static void hotkey_wakeup_reason_notify_change(void)
2245 {
2246 if (tp_features.hotkey_mask)
2247 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2248 "wakeup_reason");
2249 }
2250
2251 /* sysfs wakeup hotunplug_complete (pollable) -------------------------- */
2252 static ssize_t hotkey_wakeup_hotunplug_complete_show(struct device *dev,
2253 struct device_attribute *attr,
2254 char *buf)
2255 {
2256 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_autosleep_ack);
2257 }
2258
2259 static struct device_attribute dev_attr_hotkey_wakeup_hotunplug_complete =
2260 __ATTR(wakeup_hotunplug_complete, S_IRUGO,
2261 hotkey_wakeup_hotunplug_complete_show, NULL);
2262
2263 static void hotkey_wakeup_hotunplug_complete_notify_change(void)
2264 {
2265 if (tp_features.hotkey_mask)
2266 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2267 "wakeup_hotunplug_complete");
2268 }
2269
2270 /* --------------------------------------------------------------------- */
2271
2272 static struct attribute *hotkey_attributes[] __initdata = {
2273 &dev_attr_hotkey_enable.attr,
2274 &dev_attr_hotkey_bios_enabled.attr,
2275 &dev_attr_hotkey_report_mode.attr,
2276 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2277 &dev_attr_hotkey_mask.attr,
2278 &dev_attr_hotkey_all_mask.attr,
2279 &dev_attr_hotkey_recommended_mask.attr,
2280 &dev_attr_hotkey_source_mask.attr,
2281 &dev_attr_hotkey_poll_freq.attr,
2282 #endif
2283 };
2284
2285 static struct attribute *hotkey_mask_attributes[] __initdata = {
2286 &dev_attr_hotkey_bios_mask.attr,
2287 #ifndef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2288 &dev_attr_hotkey_mask.attr,
2289 &dev_attr_hotkey_all_mask.attr,
2290 &dev_attr_hotkey_recommended_mask.attr,
2291 #endif
2292 &dev_attr_hotkey_wakeup_reason.attr,
2293 &dev_attr_hotkey_wakeup_hotunplug_complete.attr,
2294 };
2295
2296 static void bluetooth_update_rfk(void);
2297 static void wan_update_rfk(void);
2298 static void uwb_update_rfk(void);
2299 static void tpacpi_send_radiosw_update(void)
2300 {
2301 int wlsw;
2302
2303 /* Sync these BEFORE sending any rfkill events */
2304 if (tp_features.bluetooth)
2305 bluetooth_update_rfk();
2306 if (tp_features.wan)
2307 wan_update_rfk();
2308 if (tp_features.uwb)
2309 uwb_update_rfk();
2310
2311 if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&wlsw)) {
2312 mutex_lock(&tpacpi_inputdev_send_mutex);
2313
2314 input_report_switch(tpacpi_inputdev,
2315 SW_RFKILL_ALL, !!wlsw);
2316 input_sync(tpacpi_inputdev);
2317
2318 mutex_unlock(&tpacpi_inputdev_send_mutex);
2319 }
2320 hotkey_radio_sw_notify_change();
2321 }
2322
2323 static void hotkey_exit(void)
2324 {
2325 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2326 hotkey_poll_stop_sync();
2327 #endif
2328
2329 if (hotkey_dev_attributes)
2330 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
2331
2332 kfree(hotkey_keycode_map);
2333
2334 if (tp_features.hotkey) {
2335 dbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_HKEY,
2336 "restoring original hot key mask\n");
2337 /* no short-circuit boolean operator below! */
2338 if ((hotkey_mask_set(hotkey_orig_mask) |
2339 hotkey_status_set(false)) != 0)
2340 printk(TPACPI_ERR
2341 "failed to restore hot key mask "
2342 "to BIOS defaults\n");
2343 }
2344 }
2345
2346 static int __init hotkey_init(struct ibm_init_struct *iibm)
2347 {
2348 /* Requirements for changing the default keymaps:
2349 *
2350 * 1. Many of the keys are mapped to KEY_RESERVED for very
2351 * good reasons. Do not change them unless you have deep
2352 * knowledge on the IBM and Lenovo ThinkPad firmware for
2353 * the various ThinkPad models. The driver behaves
2354 * differently for KEY_RESERVED: such keys have their
2355 * hot key mask *unset* in mask_recommended, and also
2356 * in the initial hot key mask programmed into the
2357 * firmware at driver load time, which means the firm-
2358 * ware may react very differently if you change them to
2359 * something else;
2360 *
2361 * 2. You must be subscribed to the linux-thinkpad and
2362 * ibm-acpi-devel mailing lists, and you should read the
2363 * list archives since 2007 if you want to change the
2364 * keymaps. This requirement exists so that you will
2365 * know the past history of problems with the thinkpad-
2366 * acpi driver keymaps, and also that you will be
2367 * listening to any bug reports;
2368 *
2369 * 3. Do not send thinkpad-acpi specific patches directly to
2370 * for merging, *ever*. Send them to the linux-acpi
2371 * mailinglist for comments. Merging is to be done only
2372 * through acpi-test and the ACPI maintainer.
2373 *
2374 * If the above is too much to ask, don't change the keymap.
2375 * Ask the thinkpad-acpi maintainer to do it, instead.
2376 */
2377 static u16 ibm_keycode_map[] __initdata = {
2378 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
2379 KEY_FN_F1, KEY_FN_F2, KEY_COFFEE, KEY_SLEEP,
2380 KEY_WLAN, KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
2381 KEY_FN_F9, KEY_FN_F10, KEY_FN_F11, KEY_SUSPEND,
2382
2383 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
2384 KEY_UNKNOWN, /* 0x0C: FN+BACKSPACE */
2385 KEY_UNKNOWN, /* 0x0D: FN+INSERT */
2386 KEY_UNKNOWN, /* 0x0E: FN+DELETE */
2387
2388 /* brightness: firmware always reacts to them, unless
2389 * X.org did some tricks in the radeon BIOS scratch
2390 * registers of *some* models */
2391 KEY_RESERVED, /* 0x0F: FN+HOME (brightness up) */
2392 KEY_RESERVED, /* 0x10: FN+END (brightness down) */
2393
2394 /* Thinklight: firmware always react to it */
2395 KEY_RESERVED, /* 0x11: FN+PGUP (thinklight toggle) */
2396
2397 KEY_UNKNOWN, /* 0x12: FN+PGDOWN */
2398 KEY_ZOOM, /* 0x13: FN+SPACE (zoom) */
2399
2400 /* Volume: firmware always react to it and reprograms
2401 * the built-in *extra* mixer. Never map it to control
2402 * another mixer by default. */
2403 KEY_RESERVED, /* 0x14: VOLUME UP */
2404 KEY_RESERVED, /* 0x15: VOLUME DOWN */
2405 KEY_RESERVED, /* 0x16: MUTE */
2406
2407 KEY_VENDOR, /* 0x17: Thinkpad/AccessIBM/Lenovo */
2408
2409 /* (assignments unknown, please report if found) */
2410 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
2411 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
2412 };
2413 static u16 lenovo_keycode_map[] __initdata = {
2414 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
2415 KEY_FN_F1, KEY_COFFEE, KEY_BATTERY, KEY_SLEEP,
2416 KEY_WLAN, KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
2417 KEY_FN_F9, KEY_FN_F10, KEY_FN_F11, KEY_SUSPEND,
2418
2419 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
2420 KEY_UNKNOWN, /* 0x0C: FN+BACKSPACE */
2421 KEY_UNKNOWN, /* 0x0D: FN+INSERT */
2422 KEY_UNKNOWN, /* 0x0E: FN+DELETE */
2423
2424 /* These either have to go through ACPI video, or
2425 * act like in the IBM ThinkPads, so don't ever
2426 * enable them by default */
2427 KEY_RESERVED, /* 0x0F: FN+HOME (brightness up) */
2428 KEY_RESERVED, /* 0x10: FN+END (brightness down) */
2429
2430 KEY_RESERVED, /* 0x11: FN+PGUP (thinklight toggle) */
2431
2432 KEY_UNKNOWN, /* 0x12: FN+PGDOWN */
2433 KEY_ZOOM, /* 0x13: FN+SPACE (zoom) */
2434
2435 /* Volume: z60/z61, T60 (BIOS version?): firmware always
2436 * react to it and reprograms the built-in *extra* mixer.
2437 * Never map it to control another mixer by default.
2438 *
2439 * T60?, T61, R60?, R61: firmware and EC tries to send
2440 * these over the regular keyboard, so these are no-ops,
2441 * but there are still weird bugs re. MUTE, so do not
2442 * change unless you get test reports from all Lenovo
2443 * models. May cause the BIOS to interfere with the
2444 * HDA mixer.
2445 */
2446 KEY_RESERVED, /* 0x14: VOLUME UP */
2447 KEY_RESERVED, /* 0x15: VOLUME DOWN */
2448 KEY_RESERVED, /* 0x16: MUTE */
2449
2450 KEY_VENDOR, /* 0x17: Thinkpad/AccessIBM/Lenovo */
2451
2452 /* (assignments unknown, please report if found) */
2453 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
2454 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
2455 };
2456
2457 #define TPACPI_HOTKEY_MAP_LEN ARRAY_SIZE(ibm_keycode_map)
2458 #define TPACPI_HOTKEY_MAP_SIZE sizeof(ibm_keycode_map)
2459 #define TPACPI_HOTKEY_MAP_TYPESIZE sizeof(ibm_keycode_map[0])
2460
2461 int res, i;
2462 int status;
2463 int hkeyv;
2464
2465 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
2466 "initializing hotkey subdriver\n");
2467
2468 BUG_ON(!tpacpi_inputdev);
2469 BUG_ON(tpacpi_inputdev->open != NULL ||
2470 tpacpi_inputdev->close != NULL);
2471
2472 TPACPI_ACPIHANDLE_INIT(hkey);
2473 mutex_init(&hotkey_mutex);
2474
2475 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2476 mutex_init(&hotkey_thread_mutex);
2477 mutex_init(&hotkey_thread_data_mutex);
2478 #endif
2479
2480 /* hotkey not supported on 570 */
2481 tp_features.hotkey = hkey_handle != NULL;
2482
2483 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
2484 "hotkeys are %s\n",
2485 str_supported(tp_features.hotkey));
2486
2487 if (!tp_features.hotkey)
2488 return 1;
2489
2490 tpacpi_disable_brightness_delay();
2491
2492 hotkey_dev_attributes = create_attr_set(13, NULL);
2493 if (!hotkey_dev_attributes)
2494 return -ENOMEM;
2495 res = add_many_to_attr_set(hotkey_dev_attributes,
2496 hotkey_attributes,
2497 ARRAY_SIZE(hotkey_attributes));
2498 if (res)
2499 goto err_exit;
2500
2501 /* mask not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
2502 A30, R30, R31, T20-22, X20-21, X22-24. Detected by checking
2503 for HKEY interface version 0x100 */
2504 if (acpi_evalf(hkey_handle, &hkeyv, "MHKV", "qd")) {
2505 if ((hkeyv >> 8) != 1) {
2506 printk(TPACPI_ERR "unknown version of the "
2507 "HKEY interface: 0x%x\n", hkeyv);
2508 printk(TPACPI_ERR "please report this to %s\n",
2509 TPACPI_MAIL);
2510 } else {
2511 /*
2512 * MHKV 0x100 in A31, R40, R40e,
2513 * T4x, X31, and later
2514 */
2515 tp_features.hotkey_mask = 1;
2516 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
2517 "firmware HKEY interface version: 0x%x\n",
2518 hkeyv);
2519 }
2520 }
2521
2522 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
2523 "hotkey masks are %s\n",
2524 str_supported(tp_features.hotkey_mask));
2525
2526 if (tp_features.hotkey_mask) {
2527 if (!acpi_evalf(hkey_handle, &hotkey_all_mask,
2528 "MHKA", "qd")) {
2529 printk(TPACPI_ERR
2530 "missing MHKA handler, "
2531 "please report this to %s\n",
2532 TPACPI_MAIL);
2533 /* FN+F12, FN+F4, FN+F3 */
2534 hotkey_all_mask = 0x080cU;
2535 }
2536 }
2537
2538 /* hotkey_source_mask *must* be zero for
2539 * the first hotkey_mask_get */
2540 if (tp_features.hotkey_mask) {
2541 res = hotkey_mask_get();
2542 if (res)
2543 goto err_exit;
2544
2545 hotkey_orig_mask = hotkey_mask;
2546 res = add_many_to_attr_set(
2547 hotkey_dev_attributes,
2548 hotkey_mask_attributes,
2549 ARRAY_SIZE(hotkey_mask_attributes));
2550 if (res)
2551 goto err_exit;
2552 }
2553
2554 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2555 if (tp_features.hotkey_mask) {
2556 hotkey_source_mask = TPACPI_HKEY_NVRAM_GOOD_MASK
2557 & ~hotkey_all_mask;
2558 } else {
2559 hotkey_source_mask = TPACPI_HKEY_NVRAM_GOOD_MASK;
2560 }
2561
2562 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
2563 "hotkey source mask 0x%08x, polling freq %d\n",
2564 hotkey_source_mask, hotkey_poll_freq);
2565 #endif
2566
2567 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
2568 if (dbg_wlswemul) {
2569 tp_features.hotkey_wlsw = 1;
2570 printk(TPACPI_INFO
2571 "radio switch emulation enabled\n");
2572 } else
2573 #endif
2574 /* Not all thinkpads have a hardware radio switch */
2575 if (acpi_evalf(hkey_handle, &status, "WLSW", "qd")) {
2576 tp_features.hotkey_wlsw = 1;
2577 printk(TPACPI_INFO
2578 "radio switch found; radios are %s\n",
2579 enabled(status, 0));
2580 }
2581 if (tp_features.hotkey_wlsw)
2582 res = add_to_attr_set(hotkey_dev_attributes,
2583 &dev_attr_hotkey_radio_sw.attr);
2584
2585 /* For X41t, X60t, X61t Tablets... */
2586 if (!res && acpi_evalf(hkey_handle, &status, "MHKG", "qd")) {
2587 tp_features.hotkey_tablet = 1;
2588 printk(TPACPI_INFO
2589 "possible tablet mode switch found; "
2590 "ThinkPad in %s mode\n",
2591 (status & TP_HOTKEY_TABLET_MASK)?
2592 "tablet" : "laptop");
2593 res = add_to_attr_set(hotkey_dev_attributes,
2594 &dev_attr_hotkey_tablet_mode.attr);
2595 }
2596
2597 if (!res)
2598 res = register_attr_set_with_sysfs(
2599 hotkey_dev_attributes,
2600 &tpacpi_pdev->dev.kobj);
2601 if (res)
2602 goto err_exit;
2603
2604 /* Set up key map */
2605
2606 hotkey_keycode_map = kmalloc(TPACPI_HOTKEY_MAP_SIZE,
2607 GFP_KERNEL);
2608 if (!hotkey_keycode_map) {
2609 printk(TPACPI_ERR
2610 "failed to allocate memory for key map\n");
2611 res = -ENOMEM;
2612 goto err_exit;
2613 }
2614
2615 if (thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO) {
2616 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
2617 "using Lenovo default hot key map\n");
2618 memcpy(hotkey_keycode_map, &lenovo_keycode_map,
2619 TPACPI_HOTKEY_MAP_SIZE);
2620 } else {
2621 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
2622 "using IBM default hot key map\n");
2623 memcpy(hotkey_keycode_map, &ibm_keycode_map,
2624 TPACPI_HOTKEY_MAP_SIZE);
2625 }
2626
2627 set_bit(EV_KEY, tpacpi_inputdev->evbit);
2628 set_bit(EV_MSC, tpacpi_inputdev->evbit);
2629 set_bit(MSC_SCAN, tpacpi_inputdev->mscbit);
2630 tpacpi_inputdev->keycodesize = TPACPI_HOTKEY_MAP_TYPESIZE;
2631 tpacpi_inputdev->keycodemax = TPACPI_HOTKEY_MAP_LEN;
2632 tpacpi_inputdev->keycode = hotkey_keycode_map;
2633 for (i = 0; i < TPACPI_HOTKEY_MAP_LEN; i++) {
2634 if (hotkey_keycode_map[i] != KEY_RESERVED) {
2635 set_bit(hotkey_keycode_map[i],
2636 tpacpi_inputdev->keybit);
2637 } else {
2638 if (i < sizeof(hotkey_reserved_mask)*8)
2639 hotkey_reserved_mask |= 1 << i;
2640 }
2641 }
2642
2643 if (tp_features.hotkey_wlsw) {
2644 set_bit(EV_SW, tpacpi_inputdev->evbit);
2645 set_bit(SW_RFKILL_ALL, tpacpi_inputdev->swbit);
2646 }
2647 if (tp_features.hotkey_tablet) {
2648 set_bit(EV_SW, tpacpi_inputdev->evbit);
2649 set_bit(SW_TABLET_MODE, tpacpi_inputdev->swbit);
2650 }
2651
2652 /* Do not issue duplicate brightness change events to
2653 * userspace */
2654 if (!tp_features.bright_acpimode)
2655 /* update bright_acpimode... */
2656 tpacpi_check_std_acpi_brightness_support();
2657
2658 if (tp_features.bright_acpimode && acpi_video_backlight_support()) {
2659 printk(TPACPI_INFO
2660 "This ThinkPad has standard ACPI backlight "
2661 "brightness control, supported by the ACPI "
2662 "video driver\n");
2663 printk(TPACPI_NOTICE
2664 "Disabling thinkpad-acpi brightness events "
2665 "by default...\n");
2666
2667 /* The hotkey_reserved_mask change below is not
2668 * necessary while the keys are at KEY_RESERVED in the
2669 * default map, but better safe than sorry, leave it
2670 * here as a marker of what we have to do, especially
2671 * when we finally become able to set this at runtime
2672 * on response to X.org requests */
2673 hotkey_reserved_mask |=
2674 (1 << TP_ACPI_HOTKEYSCAN_FNHOME)
2675 | (1 << TP_ACPI_HOTKEYSCAN_FNEND);
2676 }
2677
2678 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
2679 "enabling firmware HKEY event interface...\n");
2680 res = hotkey_status_set(true);
2681 if (res) {
2682 hotkey_exit();
2683 return res;
2684 }
2685 res = hotkey_mask_set(((hotkey_all_mask | hotkey_source_mask)
2686 & ~hotkey_reserved_mask)
2687 | hotkey_orig_mask);
2688 if (res < 0 && res != -ENXIO) {
2689 hotkey_exit();
2690 return res;
2691 }
2692
2693 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
2694 "legacy ibm/hotkey event reporting over procfs %s\n",
2695 (hotkey_report_mode < 2) ?
2696 "enabled" : "disabled");
2697
2698 tpacpi_inputdev->open = &hotkey_inputdev_open;
2699 tpacpi_inputdev->close = &hotkey_inputdev_close;
2700
2701 hotkey_poll_setup_safe(1);
2702 tpacpi_send_radiosw_update();
2703 tpacpi_input_send_tabletsw();
2704
2705 return 0;
2706
2707 err_exit:
2708 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
2709 hotkey_dev_attributes = NULL;
2710
2711 return (res < 0)? res : 1;
2712 }
2713
2714 static bool hotkey_notify_hotkey(const u32 hkey,
2715 bool *send_acpi_ev,
2716 bool *ignore_acpi_ev)
2717 {
2718 /* 0x1000-0x1FFF: key presses */
2719 unsigned int scancode = hkey & 0xfff;
2720 *send_acpi_ev = true;
2721 *ignore_acpi_ev = false;
2722
2723 if (scancode > 0 && scancode < 0x21) {
2724 scancode--;
2725 if (!(hotkey_source_mask & (1 << scancode))) {
2726 tpacpi_input_send_key(scancode);
2727 *send_acpi_ev = false;
2728 } else {
2729 *ignore_acpi_ev = true;
2730 }
2731 return true;
2732 }
2733 return false;
2734 }
2735
2736 static bool hotkey_notify_wakeup(const u32 hkey,
2737 bool *send_acpi_ev,
2738 bool *ignore_acpi_ev)
2739 {
2740 /* 0x2000-0x2FFF: Wakeup reason */
2741 *send_acpi_ev = true;
2742 *ignore_acpi_ev = false;
2743
2744 switch (hkey) {
2745 case 0x2304: /* suspend, undock */
2746 case 0x2404: /* hibernation, undock */
2747 hotkey_wakeup_reason = TP_ACPI_WAKEUP_UNDOCK;
2748 *ignore_acpi_ev = true;
2749 break;
2750
2751 case 0x2305: /* suspend, bay eject */
2752 case 0x2405: /* hibernation, bay eject */
2753 hotkey_wakeup_reason = TP_ACPI_WAKEUP_BAYEJ;
2754 *ignore_acpi_ev = true;
2755 break;
2756
2757 case 0x2313: /* Battery on critical low level (S3) */
2758 case 0x2413: /* Battery on critical low level (S4) */
2759 printk(TPACPI_ALERT
2760 "EMERGENCY WAKEUP: battery almost empty\n");
2761 /* how to auto-heal: */
2762 /* 2313: woke up from S3, go to S4/S5 */
2763 /* 2413: woke up from S4, go to S5 */
2764 break;
2765
2766 default:
2767 return false;
2768 }
2769
2770 if (hotkey_wakeup_reason != TP_ACPI_WAKEUP_NONE) {
2771 printk(TPACPI_INFO
2772 "woke up due to a hot-unplug "
2773 "request...\n");
2774 hotkey_wakeup_reason_notify_change();
2775 }
2776 return true;
2777 }
2778
2779 static bool hotkey_notify_usrevent(const u32 hkey,
2780 bool *send_acpi_ev,
2781 bool *ignore_acpi_ev)
2782 {
2783 /* 0x5000-0x5FFF: human interface helpers */
2784 *send_acpi_ev = true;
2785 *ignore_acpi_ev = false;
2786
2787 switch (hkey) {
2788 case 0x5010: /* Lenovo new BIOS: brightness changed */
2789 case 0x500b: /* X61t: tablet pen inserted into bay */
2790 case 0x500c: /* X61t: tablet pen removed from bay */
2791 return true;
2792
2793 case 0x5009: /* X41t-X61t: swivel up (tablet mode) */
2794 case 0x500a: /* X41t-X61t: swivel down (normal mode) */
2795 tpacpi_input_send_tabletsw();
2796 hotkey_tablet_mode_notify_change();
2797 *send_acpi_ev = false;
2798 return true;
2799
2800 case 0x5001:
2801 case 0x5002:
2802 /* LID switch events. Do not propagate */
2803 *ignore_acpi_ev = true;
2804 return true;
2805
2806 default:
2807 return false;
2808 }
2809 }
2810
2811 static bool hotkey_notify_thermal(const u32 hkey,
2812 bool *send_acpi_ev,
2813 bool *ignore_acpi_ev)
2814 {
2815 /* 0x6000-0x6FFF: thermal alarms */
2816 *send_acpi_ev = true;
2817 *ignore_acpi_ev = false;
2818
2819 switch (hkey) {
2820 case 0x6011:
2821 printk(TPACPI_CRIT
2822 "THERMAL ALARM: battery is too hot!\n");
2823 /* recommended action: warn user through gui */
2824 return true;
2825 case 0x6012:
2826 printk(TPACPI_ALERT
2827 "THERMAL EMERGENCY: battery is extremely hot!\n");
2828 /* recommended action: immediate sleep/hibernate */
2829 return true;
2830 case 0x6021:
2831 printk(TPACPI_CRIT
2832 "THERMAL ALARM: "
2833 "a sensor reports something is too hot!\n");
2834 /* recommended action: warn user through gui, that */
2835 /* some internal component is too hot */
2836 return true;
2837 case 0x6022:
2838 printk(TPACPI_ALERT
2839 "THERMAL EMERGENCY: "
2840 "a sensor reports something is extremely hot!\n");
2841 /* recommended action: immediate sleep/hibernate */
2842 return true;
2843 case 0x6030:
2844 printk(TPACPI_INFO
2845 "EC reports that Thermal Table has changed\n");
2846 /* recommended action: do nothing, we don't have
2847 * Lenovo ATM information */
2848 return true;
2849 default:
2850 printk(TPACPI_ALERT
2851 "THERMAL ALERT: unknown thermal alarm received\n");
2852 return false;
2853 }
2854 }
2855
2856 static void hotkey_notify(struct ibm_struct *ibm, u32 event)
2857 {
2858 u32 hkey;
2859 bool send_acpi_ev;
2860 bool ignore_acpi_ev;
2861 bool known_ev;
2862
2863 if (event != 0x80) {
2864 printk(TPACPI_ERR
2865 "unknown HKEY notification event %d\n", event);
2866 /* forward it to userspace, maybe it knows how to handle it */
2867 acpi_bus_generate_netlink_event(
2868 ibm->acpi->device->pnp.device_class,
2869 dev_name(&ibm->acpi->device->dev),
2870 event, 0);
2871 return;
2872 }
2873
2874 while (1) {
2875 if (!acpi_evalf(hkey_handle, &hkey, "MHKP", "d")) {
2876 printk(TPACPI_ERR "failed to retrieve HKEY event\n");
2877 return;
2878 }
2879
2880 if (hkey == 0) {
2881 /* queue empty */
2882 return;
2883 }
2884
2885 send_acpi_ev = true;
2886 ignore_acpi_ev = false;
2887
2888 switch (hkey >> 12) {
2889 case 1:
2890 /* 0x1000-0x1FFF: key presses */
2891 known_ev = hotkey_notify_hotkey(hkey, &send_acpi_ev,
2892 &ignore_acpi_ev);
2893 break;
2894 case 2:
2895 /* 0x2000-0x2FFF: Wakeup reason */
2896 known_ev = hotkey_notify_wakeup(hkey, &send_acpi_ev,
2897 &ignore_acpi_ev);
2898 break;
2899 case 3:
2900 /* 0x3000-0x3FFF: bay-related wakeups */
2901 if (hkey == 0x3003) {
2902 hotkey_autosleep_ack = 1;
2903 printk(TPACPI_INFO
2904 "bay ejected\n");
2905 hotkey_wakeup_hotunplug_complete_notify_change();
2906 known_ev = true;
2907 } else {
2908 known_ev = false;
2909 }
2910 break;
2911 case 4:
2912 /* 0x4000-0x4FFF: dock-related wakeups */
2913 if (hkey == 0x4003) {
2914 hotkey_autosleep_ack = 1;
2915 printk(TPACPI_INFO
2916 "undocked\n");
2917 hotkey_wakeup_hotunplug_complete_notify_change();
2918 known_ev = true;
2919 } else {
2920 known_ev = false;
2921 }
2922 break;
2923 case 5:
2924 /* 0x5000-0x5FFF: human interface helpers */
2925 known_ev = hotkey_notify_usrevent(hkey, &send_acpi_ev,
2926 &ignore_acpi_ev);
2927 break;
2928 case 6:
2929 /* 0x6000-0x6FFF: thermal alarms */
2930 known_ev = hotkey_notify_thermal(hkey, &send_acpi_ev,
2931 &ignore_acpi_ev);
2932 break;
2933 case 7:
2934 /* 0x7000-0x7FFF: misc */
2935 if (tp_features.hotkey_wlsw && hkey == 0x7000) {
2936 tpacpi_send_radiosw_update();
2937 send_acpi_ev = 0;
2938 known_ev = true;
2939 break;
2940 }
2941 /* fallthrough to default */
2942 default:
2943 known_ev = false;
2944 }
2945 if (!known_ev) {
2946 printk(TPACPI_NOTICE
2947 "unhandled HKEY event 0x%04x\n", hkey);
2948 printk(TPACPI_NOTICE
2949 "please report the conditions when this "
2950 "event happened to %s\n", TPACPI_MAIL);
2951 }
2952
2953 /* Legacy events */
2954 if (!ignore_acpi_ev &&
2955 (send_acpi_ev || hotkey_report_mode < 2)) {
2956 acpi_bus_generate_proc_event(ibm->acpi->device,
2957 event, hkey);
2958 }
2959
2960 /* netlink events */
2961 if (!ignore_acpi_ev && send_acpi_ev) {
2962 acpi_bus_generate_netlink_event(
2963 ibm->acpi->device->pnp.device_class,
2964 dev_name(&ibm->acpi->device->dev),
2965 event, hkey);
2966 }
2967 }
2968 }
2969
2970 static void hotkey_suspend(pm_message_t state)
2971 {
2972 /* Do these on suspend, we get the events on early resume! */
2973 hotkey_wakeup_reason = TP_ACPI_WAKEUP_NONE;
2974 hotkey_autosleep_ack = 0;
2975 }
2976
2977 static void hotkey_resume(void)
2978 {
2979 tpacpi_disable_brightness_delay();
2980
2981 if (hotkey_mask_get())
2982 printk(TPACPI_ERR
2983 "error while trying to read hot key mask "
2984 "from firmware\n");
2985 tpacpi_send_radiosw_update();
2986 hotkey_tablet_mode_notify_change();
2987 hotkey_wakeup_reason_notify_change();
2988 hotkey_wakeup_hotunplug_complete_notify_change();
2989 hotkey_poll_setup_safe(0);
2990 }
2991
2992 /* procfs -------------------------------------------------------------- */
2993 static int hotkey_read(char *p)
2994 {
2995 int res, status;
2996 int len = 0;
2997
2998 if (!tp_features.hotkey) {
2999 len += sprintf(p + len, "status:\t\tnot supported\n");
3000 return len;
3001 }
3002
3003 if (mutex_lock_killable(&hotkey_mutex))
3004 return -ERESTARTSYS;
3005 res = hotkey_status_get(&status);
3006 if (!res)
3007 res = hotkey_mask_get();
3008 mutex_unlock(&hotkey_mutex);
3009 if (res)
3010 return res;
3011
3012 len += sprintf(p + len, "status:\t\t%s\n", enabled(status, 0));
3013 if (tp_features.hotkey_mask) {
3014 len += sprintf(p + len, "mask:\t\t0x%08x\n", hotkey_mask);
3015 len += sprintf(p + len,
3016 "commands:\tenable, disable, reset, <mask>\n");
3017 } else {
3018 len += sprintf(p + len, "mask:\t\tnot supported\n");
3019 len += sprintf(p + len, "commands:\tenable, disable, reset\n");
3020 }
3021
3022 return len;
3023 }
3024
3025 static void hotkey_enabledisable_warn(bool enable)
3026 {
3027 tpacpi_log_usertask("procfs hotkey enable/disable");
3028 if (!WARN((tpacpi_lifecycle == TPACPI_LIFE_RUNNING || !enable),
3029 TPACPI_WARN
3030 "hotkey enable/disable functionality has been "
3031 "removed from the driver. Hotkeys are always "
3032 "enabled\n"))
3033 printk(TPACPI_ERR
3034 "Please remove the hotkey=enable module "
3035 "parameter, it is deprecated. Hotkeys are always "
3036 "enabled\n");
3037 }
3038
3039 static int hotkey_write(char *buf)
3040 {
3041 int res;
3042 u32 mask;
3043 char *cmd;
3044
3045 if (!tp_features.hotkey)
3046 return -ENODEV;
3047
3048 if (mutex_lock_killable(&hotkey_mutex))
3049 return -ERESTARTSYS;
3050
3051 mask = hotkey_mask;
3052
3053 res = 0;
3054 while ((cmd = next_cmd(&buf))) {
3055 if (strlencmp(cmd, "enable") == 0) {
3056 hotkey_enabledisable_warn(1);
3057 } else if (strlencmp(cmd, "disable") == 0) {
3058 hotkey_enabledisable_warn(0);
3059 res = -EPERM;
3060 } else if (strlencmp(cmd, "reset") == 0) {
3061 mask = hotkey_orig_mask;
3062 } else if (sscanf(cmd, "0x%x", &mask) == 1) {
3063 /* mask set */
3064 } else if (sscanf(cmd, "%x", &mask) == 1) {
3065 /* mask set */
3066 } else {
3067 res = -EINVAL;
3068 goto errexit;
3069 }
3070 }
3071
3072 if (!res)
3073 tpacpi_disclose_usertask("procfs hotkey",
3074 "set mask to 0x%08x\n", mask);
3075
3076 if (!res && mask != hotkey_mask)
3077 res = hotkey_mask_set(mask);
3078
3079 errexit:
3080 mutex_unlock(&hotkey_mutex);
3081 return res;
3082 }
3083
3084 static const struct acpi_device_id ibm_htk_device_ids[] = {
3085 {TPACPI_ACPI_HKEY_HID, 0},
3086 {"", 0},
3087 };
3088
3089 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver = {
3090 .hid = ibm_htk_device_ids,
3091 .notify = hotkey_notify,
3092 .handle = &hkey_handle,
3093 .type = ACPI_DEVICE_NOTIFY,
3094 };
3095
3096 static struct ibm_struct hotkey_driver_data = {
3097 .name = "hotkey",
3098 .read = hotkey_read,
3099 .write = hotkey_write,
3100 .exit = hotkey_exit,
3101 .resume = hotkey_resume,
3102 .suspend = hotkey_suspend,
3103 .acpi = &ibm_hotkey_acpidriver,
3104 };
3105
3106 /*************************************************************************
3107 * Bluetooth subdriver
3108 */
3109
3110 enum {
3111 /* ACPI GBDC/SBDC bits */
3112 TP_ACPI_BLUETOOTH_HWPRESENT = 0x01, /* Bluetooth hw available */
3113 TP_ACPI_BLUETOOTH_RADIOSSW = 0x02, /* Bluetooth radio enabled */
3114 TP_ACPI_BLUETOOTH_RESUMECTRL = 0x04, /* Bluetooth state at resume:
3115 off / last state */
3116 };
3117
3118 enum {
3119 /* ACPI \BLTH commands */
3120 TP_ACPI_BLTH_GET_ULTRAPORT_ID = 0x00, /* Get Ultraport BT ID */
3121 TP_ACPI_BLTH_GET_PWR_ON_RESUME = 0x01, /* Get power-on-resume state */
3122 TP_ACPI_BLTH_PWR_ON_ON_RESUME = 0x02, /* Resume powered on */
3123 TP_ACPI_BLTH_PWR_OFF_ON_RESUME = 0x03, /* Resume powered off */
3124 TP_ACPI_BLTH_SAVE_STATE = 0x05, /* Save state for S4/S5 */
3125 };
3126
3127 #define TPACPI_RFK_BLUETOOTH_SW_NAME "tpacpi_bluetooth_sw"
3128
3129 static struct rfkill *tpacpi_bluetooth_rfkill;
3130
3131 static void bluetooth_suspend(pm_message_t state)
3132 {
3133 /* Try to make sure radio will resume powered off */
3134 if (!acpi_evalf(NULL, NULL, "\\BLTH", "vd",
3135 TP_ACPI_BLTH_PWR_OFF_ON_RESUME))
3136 vdbg_printk(TPACPI_DBG_RFKILL,
3137 "bluetooth power down on resume request failed\n");
3138 }
3139
3140 static int bluetooth_get_radiosw(void)
3141 {
3142 int status;
3143
3144 if (!tp_features.bluetooth)
3145 return -ENODEV;
3146
3147 /* WLSW overrides bluetooth in firmware/hardware, reflect that */
3148 if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&status) && !status)
3149 return RFKILL_STATE_HARD_BLOCKED;
3150
3151 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3152 if (dbg_bluetoothemul)
3153 return (tpacpi_bluetooth_emulstate) ?
3154 RFKILL_STATE_UNBLOCKED : RFKILL_STATE_SOFT_BLOCKED;
3155 #endif
3156
3157 if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
3158 return -EIO;
3159
3160 return ((status & TP_ACPI_BLUETOOTH_RADIOSSW) != 0) ?
3161 RFKILL_STATE_UNBLOCKED : RFKILL_STATE_SOFT_BLOCKED;
3162 }
3163
3164 static void bluetooth_update_rfk(void)
3165 {
3166 int status;
3167
3168 if (!tpacpi_bluetooth_rfkill)
3169 return;
3170
3171 status = bluetooth_get_radiosw();
3172 if (status < 0)
3173 return;
3174 rfkill_force_state(tpacpi_bluetooth_rfkill, status);
3175
3176 vdbg_printk(TPACPI_DBG_RFKILL,
3177 "forced rfkill state to %d\n",
3178 status);
3179 }
3180
3181 static int bluetooth_set_radiosw(int radio_on, int update_rfk)
3182 {
3183 int status;
3184
3185 if (!tp_features.bluetooth)
3186 return -ENODEV;
3187
3188 /* WLSW overrides bluetooth in firmware/hardware, but there is no
3189 * reason to risk weird behaviour. */
3190 if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&status) && !status
3191 && radio_on)
3192 return -EPERM;
3193
3194 vdbg_printk(TPACPI_DBG_RFKILL,
3195 "will %s bluetooth\n", radio_on ? "enable" : "disable");
3196
3197 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3198 if (dbg_bluetoothemul) {
3199 tpacpi_bluetooth_emulstate = !!radio_on;
3200 if (update_rfk)
3201 bluetooth_update_rfk();
3202 return 0;
3203 }
3204 #endif
3205
3206 /* We make sure to keep TP_ACPI_BLUETOOTH_RESUMECTRL off */
3207 if (radio_on)
3208 status = TP_ACPI_BLUETOOTH_RADIOSSW;
3209 else
3210 status = 0;
3211 if (!acpi_evalf(hkey_handle, NULL, "SBDC", "vd", status))
3212 return -EIO;
3213
3214 if (update_rfk)
3215 bluetooth_update_rfk();
3216
3217 return 0;
3218 }
3219
3220 /* sysfs bluetooth enable ---------------------------------------------- */
3221 static ssize_t bluetooth_enable_show(struct device *dev,
3222 struct device_attribute *attr,
3223 char *buf)
3224 {
3225 int status;
3226
3227 printk_deprecated_rfkill_attribute("bluetooth_enable");
3228
3229 status = bluetooth_get_radiosw();
3230 if (status < 0)
3231 return status;
3232
3233 return snprintf(buf, PAGE_SIZE, "%d\n",
3234 (status == RFKILL_STATE_UNBLOCKED) ? 1 : 0);
3235 }
3236
3237 static ssize_t bluetooth_enable_store(struct device *dev,
3238 struct device_attribute *attr,
3239 const char *buf, size_t count)
3240 {
3241 unsigned long t;
3242 int res;
3243
3244 printk_deprecated_rfkill_attribute("bluetooth_enable");
3245
3246 if (parse_strtoul(buf, 1, &t))
3247 return -EINVAL;
3248
3249 tpacpi_disclose_usertask("bluetooth_enable", "set to %ld\n", t);
3250
3251 res = bluetooth_set_radiosw(t, 1);
3252
3253 return (res) ? res : count;
3254 }
3255
3256 static struct device_attribute dev_attr_bluetooth_enable =
3257 __ATTR(bluetooth_enable, S_IWUSR | S_IRUGO,
3258 bluetooth_enable_show, bluetooth_enable_store);
3259
3260 /* --------------------------------------------------------------------- */
3261
3262 static struct attribute *bluetooth_attributes[] = {
3263 &dev_attr_bluetooth_enable.attr,
3264 NULL
3265 };
3266
3267 static const struct attribute_group bluetooth_attr_group = {
3268 .attrs = bluetooth_attributes,
3269 };
3270
3271 static int tpacpi_bluetooth_rfk_get(void *data, enum rfkill_state *state)
3272 {
3273 int bts = bluetooth_get_radiosw();
3274
3275 if (bts < 0)
3276 return bts;
3277
3278 *state = bts;
3279 return 0;
3280 }
3281
3282 static int tpacpi_bluetooth_rfk_set(void *data, enum rfkill_state state)
3283 {
3284 dbg_printk(TPACPI_DBG_RFKILL,
3285 "request to change radio state to %d\n", state);
3286 return bluetooth_set_radiosw((state == RFKILL_STATE_UNBLOCKED), 0);
3287 }
3288
3289 static void bluetooth_shutdown(void)
3290 {
3291 /* Order firmware to save current state to NVRAM */
3292 if (!acpi_evalf(NULL, NULL, "\\BLTH", "vd",
3293 TP_ACPI_BLTH_SAVE_STATE))
3294 printk(TPACPI_NOTICE
3295 "failed to save bluetooth state to NVRAM\n");
3296 else
3297 vdbg_printk(TPACPI_DBG_RFKILL,
3298 "bluestooth state saved to NVRAM\n");
3299 }
3300
3301 static void bluetooth_exit(void)
3302 {
3303 bluetooth_shutdown();
3304
3305 if (tpacpi_bluetooth_rfkill)
3306 rfkill_unregister(tpacpi_bluetooth_rfkill);
3307
3308 sysfs_remove_group(&tpacpi_pdev->dev.kobj,
3309 &bluetooth_attr_group);
3310 }
3311
3312 static int __init bluetooth_init(struct ibm_init_struct *iibm)
3313 {
3314 int res;
3315 int status = 0;
3316
3317 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
3318 "initializing bluetooth subdriver\n");
3319
3320 TPACPI_ACPIHANDLE_INIT(hkey);
3321
3322 /* bluetooth not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
3323 G4x, R30, R31, R40e, R50e, T20-22, X20-21 */
3324 tp_features.bluetooth = hkey_handle &&
3325 acpi_evalf(hkey_handle, &status, "GBDC", "qd");
3326
3327 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
3328 "bluetooth is %s, status 0x%02x\n",
3329 str_supported(tp_features.bluetooth),
3330 status);
3331
3332 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3333 if (dbg_bluetoothemul) {
3334 tp_features.bluetooth = 1;
3335 printk(TPACPI_INFO
3336 "bluetooth switch emulation enabled\n");
3337 } else
3338 #endif
3339 if (tp_features.bluetooth &&
3340 !(status & TP_ACPI_BLUETOOTH_HWPRESENT)) {
3341 /* no bluetooth hardware present in system */
3342 tp_features.bluetooth = 0;
3343 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
3344 "bluetooth hardware not installed\n");
3345 }
3346
3347 if (!tp_features.bluetooth)
3348 return 1;
3349
3350 res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
3351 &bluetooth_attr_group);
3352 if (res)
3353 return res;
3354
3355 res = tpacpi_new_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID,
3356 &tpacpi_bluetooth_rfkill,
3357 RFKILL_TYPE_BLUETOOTH,
3358 TPACPI_RFK_BLUETOOTH_SW_NAME,
3359 true,
3360 tpacpi_bluetooth_rfk_set,
3361 tpacpi_bluetooth_rfk_get);
3362 if (res) {
3363 bluetooth_exit();
3364 return res;
3365 }
3366
3367 return 0;
3368 }
3369
3370 /* procfs -------------------------------------------------------------- */
3371 static int bluetooth_read(char *p)
3372 {
3373 int len = 0;
3374 int status = bluetooth_get_radiosw();
3375
3376 if (!tp_features.bluetooth)
3377 len += sprintf(p + len, "status:\t\tnot supported\n");
3378 else {
3379 len += sprintf(p + len, "status:\t\t%s\n",
3380 (status == RFKILL_STATE_UNBLOCKED) ?
3381 "enabled" : "disabled");
3382 len += sprintf(p + len, "commands:\tenable, disable\n");
3383 }
3384
3385 return len;
3386 }
3387
3388 static int bluetooth_write(char *buf)
3389 {
3390 char *cmd;
3391 int state = -1;
3392
3393 if (!tp_features.bluetooth)
3394 return -ENODEV;
3395
3396 while ((cmd = next_cmd(&buf))) {
3397 if (strlencmp(cmd, "enable") == 0) {
3398 state = 1;
3399 } else if (strlencmp(cmd, "disable") == 0) {
3400 state = 0;
3401 } else
3402 return -EINVAL;
3403 }
3404
3405 if (state != -1) {
3406 tpacpi_disclose_usertask("procfs bluetooth",
3407 "attempt to %s\n",
3408 state ? "enable" : "disable");
3409 bluetooth_set_radiosw(state, 1);
3410 }
3411
3412 return 0;
3413 }
3414
3415 static struct ibm_struct bluetooth_driver_data = {
3416 .name = "bluetooth",
3417 .read = bluetooth_read,
3418 .write = bluetooth_write,
3419 .exit = bluetooth_exit,
3420 .suspend = bluetooth_suspend,
3421 .shutdown = bluetooth_shutdown,
3422 };
3423
3424 /*************************************************************************
3425 * Wan subdriver
3426 */
3427
3428 enum {
3429 /* ACPI GWAN/SWAN bits */
3430 TP_ACPI_WANCARD_HWPRESENT = 0x01, /* Wan hw available */
3431 TP_ACPI_WANCARD_RADIOSSW = 0x02, /* Wan radio enabled */
3432 TP_ACPI_WANCARD_RESUMECTRL = 0x04, /* Wan state at resume:
3433 off / last state */
3434 };
3435
3436 #define TPACPI_RFK_WWAN_SW_NAME "tpacpi_wwan_sw"
3437
3438 static struct rfkill *tpacpi_wan_rfkill;
3439
3440 static void wan_suspend(pm_message_t state)
3441 {
3442 /* Try to make sure radio will resume powered off */
3443 if (!acpi_evalf(NULL, NULL, "\\WGSV", "qvd",
3444 TP_ACPI_WGSV_PWR_OFF_ON_RESUME))
3445 vdbg_printk(TPACPI_DBG_RFKILL,
3446 "WWAN power down on resume request failed\n");
3447 }
3448
3449 static int wan_get_radiosw(void)
3450 {
3451 int status;
3452
3453 if (!tp_features.wan)
3454 return -ENODEV;
3455
3456 /* WLSW overrides WWAN in firmware/hardware, reflect that */
3457 if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&status) && !status)
3458 return RFKILL_STATE_HARD_BLOCKED;
3459
3460 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3461 if (dbg_wwanemul)
3462 return (tpacpi_wwan_emulstate) ?
3463 RFKILL_STATE_UNBLOCKED : RFKILL_STATE_SOFT_BLOCKED;
3464 #endif
3465
3466 if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
3467 return -EIO;
3468
3469 return ((status & TP_ACPI_WANCARD_RADIOSSW) != 0) ?
3470 RFKILL_STATE_UNBLOCKED : RFKILL_STATE_SOFT_BLOCKED;
3471 }
3472
3473 static void wan_update_rfk(void)
3474 {
3475 int status;
3476
3477 if (!tpacpi_wan_rfkill)
3478 return;
3479
3480 status = wan_get_radiosw();
3481 if (status < 0)
3482 return;
3483 rfkill_force_state(tpacpi_wan_rfkill, status);
3484
3485 vdbg_printk(TPACPI_DBG_RFKILL,
3486 "forced rfkill state to %d\n",
3487 status);
3488 }
3489
3490 static int wan_set_radiosw(int radio_on, int update_rfk)
3491 {
3492 int status;
3493
3494 if (!tp_features.wan)
3495 return -ENODEV;
3496
3497 /* WLSW overrides bluetooth in firmware/hardware, but there is no
3498 * reason to risk weird behaviour. */
3499 if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&status) && !status
3500 && radio_on)
3501 return -EPERM;
3502
3503 vdbg_printk(TPACPI_DBG_RFKILL,
3504 "will %s WWAN\n", radio_on ? "enable" : "disable");
3505
3506 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3507 if (dbg_wwanemul) {
3508 tpacpi_wwan_emulstate = !!radio_on;
3509 if (update_rfk)
3510 wan_update_rfk();
3511 return 0;
3512 }
3513 #endif
3514
3515 /* We make sure to keep TP_ACPI_WANCARD_RESUMECTRL off */
3516 if (radio_on)
3517 status = TP_ACPI_WANCARD_RADIOSSW;
3518 else
3519 status = 0;
3520 if (!acpi_evalf(hkey_handle, NULL, "SWAN", "vd", status))
3521 return -EIO;
3522
3523 if (update_rfk)
3524 wan_update_rfk();
3525
3526 return 0;
3527 }
3528
3529 /* sysfs wan enable ---------------------------------------------------- */
3530 static ssize_t wan_enable_show(struct device *dev,
3531 struct device_attribute *attr,
3532 char *buf)
3533 {
3534 int status;
3535
3536 printk_deprecated_rfkill_attribute("wwan_enable");
3537
3538 status = wan_get_radiosw();
3539 if (status < 0)
3540 return status;
3541
3542 return snprintf(buf, PAGE_SIZE, "%d\n",
3543 (status == RFKILL_STATE_UNBLOCKED) ? 1 : 0);
3544 }
3545
3546 static ssize_t wan_enable_store(struct device *dev,
3547 struct device_attribute *attr,
3548 const char *buf, size_t count)
3549 {
3550 unsigned long t;
3551 int res;
3552
3553 printk_deprecated_rfkill_attribute("wwan_enable");
3554
3555 if (parse_strtoul(buf, 1, &t))
3556 return -EINVAL;
3557
3558 tpacpi_disclose_usertask("wwan_enable", "set to %ld\n", t);
3559
3560 res = wan_set_radiosw(t, 1);
3561
3562 return (res) ? res : count;
3563 }
3564
3565 static struct device_attribute dev_attr_wan_enable =
3566 __ATTR(wwan_enable, S_IWUSR | S_IRUGO,
3567 wan_enable_show, wan_enable_store);
3568
3569 /* --------------------------------------------------------------------- */
3570
3571 static struct attribute *wan_attributes[] = {
3572 &dev_attr_wan_enable.attr,
3573 NULL
3574 };
3575
3576 static const struct attribute_group wan_attr_group = {
3577 .attrs = wan_attributes,
3578 };
3579
3580 static int tpacpi_wan_rfk_get(void *data, enum rfkill_state *state)
3581 {
3582 int wans = wan_get_radiosw();
3583
3584 if (wans < 0)
3585 return wans;
3586
3587 *state = wans;
3588 return 0;
3589 }
3590
3591 static int tpacpi_wan_rfk_set(void *data, enum rfkill_state state)
3592 {
3593 dbg_printk(TPACPI_DBG_RFKILL,
3594 "request to change radio state to %d\n", state);
3595 return wan_set_radiosw((state == RFKILL_STATE_UNBLOCKED), 0);
3596 }
3597
3598 static void wan_shutdown(void)
3599 {
3600 /* Order firmware to save current state to NVRAM */
3601 if (!acpi_evalf(NULL, NULL, "\\WGSV", "vd",
3602 TP_ACPI_WGSV_SAVE_STATE))
3603 printk(TPACPI_NOTICE
3604 "failed to save WWAN state to NVRAM\n");
3605 else
3606 vdbg_printk(TPACPI_DBG_RFKILL,
3607 "WWAN state saved to NVRAM\n");
3608 }
3609
3610 static void wan_exit(void)
3611 {
3612 wan_shutdown();
3613
3614 if (tpacpi_wan_rfkill)
3615 rfkill_unregister(tpacpi_wan_rfkill);
3616
3617 sysfs_remove_group(&tpacpi_pdev->dev.kobj,
3618 &wan_attr_group);
3619 }
3620
3621 static int __init wan_init(struct ibm_init_struct *iibm)
3622 {
3623 int res;
3624 int status = 0;
3625
3626 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
3627 "initializing wan subdriver\n");
3628
3629 TPACPI_ACPIHANDLE_INIT(hkey);
3630
3631 tp_features.wan = hkey_handle &&
3632 acpi_evalf(hkey_handle, &status, "GWAN", "qd");
3633
3634 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
3635 "wan is %s, status 0x%02x\n",
3636 str_supported(tp_features.wan),
3637 status);
3638
3639 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3640 if (dbg_wwanemul) {
3641 tp_features.wan = 1;
3642 printk(TPACPI_INFO
3643 "wwan switch emulation enabled\n");
3644 } else
3645 #endif
3646 if (tp_features.wan &&
3647 !(status & TP_ACPI_WANCARD_HWPRESENT)) {
3648 /* no wan hardware present in system */
3649 tp_features.wan = 0;
3650 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
3651 "wan hardware not installed\n");
3652 }
3653
3654 if (!tp_features.wan)
3655 return 1;
3656
3657 res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
3658 &wan_attr_group);
3659 if (res)
3660 return res;
3661
3662 res = tpacpi_new_rfkill(TPACPI_RFK_WWAN_SW_ID,
3663 &tpacpi_wan_rfkill,
3664 RFKILL_TYPE_WWAN,
3665 TPACPI_RFK_WWAN_SW_NAME,
3666 true,
3667 tpacpi_wan_rfk_set,
3668 tpacpi_wan_rfk_get);
3669 if (res) {
3670 wan_exit();
3671 return res;
3672 }
3673
3674 return 0;
3675 }
3676
3677 /* procfs -------------------------------------------------------------- */
3678 static int wan_read(char *p)
3679 {
3680 int len = 0;
3681 int status = wan_get_radiosw();
3682
3683 tpacpi_disclose_usertask("procfs wan", "read");
3684
3685 if (!tp_features.wan)
3686 len += sprintf(p + len, "status:\t\tnot supported\n");
3687 else {
3688 len += sprintf(p + len, "status:\t\t%s\n",
3689 (status == RFKILL_STATE_UNBLOCKED) ?
3690 "enabled" : "disabled");
3691 len += sprintf(p + len, "commands:\tenable, disable\n");
3692 }
3693
3694 return len;
3695 }
3696
3697 static int wan_write(char *buf)
3698 {
3699 char *cmd;
3700 int state = -1;
3701
3702 if (!tp_features.wan)
3703 return -ENODEV;
3704
3705 while ((cmd = next_cmd(&buf))) {
3706 if (strlencmp(cmd, "enable") == 0) {
3707 state = 1;
3708 } else if (strlencmp(cmd, "disable") == 0) {
3709 state = 0;
3710 } else
3711 return -EINVAL;
3712 }
3713
3714 if (state != -1) {
3715 tpacpi_disclose_usertask("procfs wan",
3716 "attempt to %s\n",
3717 state ? "enable" : "disable");
3718 wan_set_radiosw(state, 1);
3719 }
3720
3721 return 0;
3722 }
3723
3724 static struct ibm_struct wan_driver_data = {
3725 .name = "wan",
3726 .read = wan_read,
3727 .write = wan_write,
3728 .exit = wan_exit,
3729 .suspend = wan_suspend,
3730 .shutdown = wan_shutdown,
3731 };
3732
3733 /*************************************************************************
3734 * UWB subdriver
3735 */
3736
3737 enum {
3738 /* ACPI GUWB/SUWB bits */
3739 TP_ACPI_UWB_HWPRESENT = 0x01, /* UWB hw available */
3740 TP_ACPI_UWB_RADIOSSW = 0x02, /* UWB radio enabled */
3741 };
3742
3743 #define TPACPI_RFK_UWB_SW_NAME "tpacpi_uwb_sw"
3744
3745 static struct rfkill *tpacpi_uwb_rfkill;
3746
3747 static int uwb_get_radiosw(void)
3748 {
3749 int status;
3750
3751 if (!tp_features.uwb)
3752 return -ENODEV;
3753
3754 /* WLSW overrides UWB in firmware/hardware, reflect that */
3755 if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&status) && !status)
3756 return RFKILL_STATE_HARD_BLOCKED;
3757
3758 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3759 if (dbg_uwbemul)
3760 return (tpacpi_uwb_emulstate) ?
3761 RFKILL_STATE_UNBLOCKED : RFKILL_STATE_SOFT_BLOCKED;
3762 #endif
3763
3764 if (!acpi_evalf(hkey_handle, &status, "GUWB", "d"))
3765 return -EIO;
3766
3767 return ((status & TP_ACPI_UWB_RADIOSSW) != 0) ?
3768 RFKILL_STATE_UNBLOCKED : RFKILL_STATE_SOFT_BLOCKED;
3769 }
3770
3771 static void uwb_update_rfk(void)
3772 {
3773 int status;
3774
3775 if (!tpacpi_uwb_rfkill)
3776 return;
3777
3778 status = uwb_get_radiosw();
3779 if (status < 0)
3780 return;
3781 rfkill_force_state(tpacpi_uwb_rfkill, status);
3782
3783 vdbg_printk(TPACPI_DBG_RFKILL,
3784 "forced rfkill state to %d\n",
3785 status);
3786 }
3787
3788 static int uwb_set_radiosw(int radio_on, int update_rfk)
3789 {
3790 int status;
3791
3792 if (!tp_features.uwb)
3793 return -ENODEV;
3794
3795 /* WLSW overrides UWB in firmware/hardware, but there is no
3796 * reason to risk weird behaviour. */
3797 if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&status) && !status
3798 && radio_on)
3799 return -EPERM;
3800
3801 vdbg_printk(TPACPI_DBG_RFKILL,
3802 "will %s UWB\n", radio_on ? "enable" : "disable");
3803
3804 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3805 if (dbg_uwbemul) {
3806 tpacpi_uwb_emulstate = !!radio_on;
3807 if (update_rfk)
3808 uwb_update_rfk();
3809 return 0;
3810 }
3811 #endif
3812
3813 status = (radio_on) ? TP_ACPI_UWB_RADIOSSW : 0;
3814 if (!acpi_evalf(hkey_handle, NULL, "SUWB", "vd", status))
3815 return -EIO;
3816
3817 if (update_rfk)
3818 uwb_update_rfk();
3819
3820 return 0;
3821 }
3822
3823 /* --------------------------------------------------------------------- */
3824
3825 static int tpacpi_uwb_rfk_get(void *data, enum rfkill_state *state)
3826 {
3827 int uwbs = uwb_get_radiosw();
3828
3829 if (uwbs < 0)
3830 return uwbs;
3831
3832 *state = uwbs;
3833 return 0;
3834 }
3835
3836 static int tpacpi_uwb_rfk_set(void *data, enum rfkill_state state)
3837 {
3838 dbg_printk(TPACPI_DBG_RFKILL,
3839 "request to change radio state to %d\n", state);
3840 return uwb_set_radiosw((state == RFKILL_STATE_UNBLOCKED), 0);
3841 }
3842
3843 static void uwb_exit(void)
3844 {
3845 if (tpacpi_uwb_rfkill)
3846 rfkill_unregister(tpacpi_uwb_rfkill);
3847 }
3848
3849 static int __init uwb_init(struct ibm_init_struct *iibm)
3850 {
3851 int res;
3852 int status = 0;
3853
3854 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
3855 "initializing uwb subdriver\n");
3856
3857 TPACPI_ACPIHANDLE_INIT(hkey);
3858
3859 tp_features.uwb = hkey_handle &&
3860 acpi_evalf(hkey_handle, &status, "GUWB", "qd");
3861
3862 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
3863 "uwb is %s, status 0x%02x\n",
3864 str_supported(tp_features.uwb),
3865 status);
3866
3867 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3868 if (dbg_uwbemul) {
3869 tp_features.uwb = 1;
3870 printk(TPACPI_INFO
3871 "uwb switch emulation enabled\n");
3872 } else
3873 #endif
3874 if (tp_features.uwb &&
3875 !(status & TP_ACPI_UWB_HWPRESENT)) {
3876 /* no uwb hardware present in system */
3877 tp_features.uwb = 0;
3878 dbg_printk(TPACPI_DBG_INIT,
3879 "uwb hardware not installed\n");
3880 }
3881
3882 if (!tp_features.uwb)
3883 return 1;
3884
3885 res = tpacpi_new_rfkill(TPACPI_RFK_UWB_SW_ID,
3886 &tpacpi_uwb_rfkill,
3887 RFKILL_TYPE_UWB,
3888 TPACPI_RFK_UWB_SW_NAME,
3889 false,
3890 tpacpi_uwb_rfk_set,
3891 tpacpi_uwb_rfk_get);
3892
3893 return res;
3894 }
3895
3896 static struct ibm_struct uwb_driver_data = {
3897 .name = "uwb",
3898 .exit = uwb_exit,
3899 .flags.experimental = 1,
3900 };
3901
3902 /*************************************************************************
3903 * Video subdriver
3904 */
3905
3906 #ifdef CONFIG_THINKPAD_ACPI_VIDEO
3907
3908 enum video_access_mode {
3909 TPACPI_VIDEO_NONE = 0,
3910 TPACPI_VIDEO_570, /* 570 */
3911 TPACPI_VIDEO_770, /* 600e/x, 770e, 770x */
3912 TPACPI_VIDEO_NEW, /* all others */
3913 };
3914
3915 enum { /* video status flags, based on VIDEO_570 */
3916 TP_ACPI_VIDEO_S_LCD = 0x01, /* LCD output enabled */
3917 TP_ACPI_VIDEO_S_CRT = 0x02, /* CRT output enabled */
3918 TP_ACPI_VIDEO_S_DVI = 0x08, /* DVI output enabled */
3919 };
3920
3921 enum { /* TPACPI_VIDEO_570 constants */
3922 TP_ACPI_VIDEO_570_PHSCMD = 0x87, /* unknown magic constant :( */
3923 TP_ACPI_VIDEO_570_PHSMASK = 0x03, /* PHS bits that map to
3924 * video_status_flags */
3925 TP_ACPI_VIDEO_570_PHS2CMD = 0x8b, /* unknown magic constant :( */
3926 TP_ACPI_VIDEO_570_PHS2SET = 0x80, /* unknown magic constant :( */
3927 };
3928
3929 static enum video_access_mode video_supported;
3930 static int video_orig_autosw;
3931
3932 static int video_autosw_get(void);
3933 static int video_autosw_set(int enable);
3934
3935 TPACPI_HANDLE(vid2, root, "\\_SB.PCI0.AGPB.VID"); /* G41 */
3936
3937 static int __init video_init(struct ibm_init_struct *iibm)
3938 {
3939 int ivga;
3940
3941 vdbg_printk(TPACPI_DBG_INIT, "initializing video subdriver\n");
3942
3943 TPACPI_ACPIHANDLE_INIT(vid);
3944 TPACPI_ACPIHANDLE_INIT(vid2);
3945
3946 if (vid2_handle && acpi_evalf(NULL, &ivga, "\\IVGA", "d") && ivga)
3947 /* G41, assume IVGA doesn't change */
3948 vid_handle = vid2_handle;
3949
3950 if (!vid_handle)
3951 /* video switching not supported on R30, R31 */
3952 video_supported = TPACPI_VIDEO_NONE;
3953 else if (acpi_evalf(vid_handle, &video_orig_autosw, "SWIT", "qd"))
3954 /* 570 */
3955 video_supported = TPACPI_VIDEO_570;
3956 else if (acpi_evalf(vid_handle, &video_orig_autosw, "^VADL", "qd"))
3957 /* 600e/x, 770e, 770x */
3958 video_supported = TPACPI_VIDEO_770;
3959 else
3960 /* all others */
3961 video_supported = TPACPI_VIDEO_NEW;
3962
3963 vdbg_printk(TPACPI_DBG_INIT, "video is %s, mode %d\n",
3964 str_supported(video_supported != TPACPI_VIDEO_NONE),
3965 video_supported);
3966
3967 return (video_supported != TPACPI_VIDEO_NONE)? 0 : 1;
3968 }
3969
3970 static void video_exit(void)
3971 {
3972 dbg_printk(TPACPI_DBG_EXIT,
3973 "restoring original video autoswitch mode\n");
3974 if (video_autosw_set(video_orig_autosw))
3975 printk(TPACPI_ERR "error while trying to restore original "
3976 "video autoswitch mode\n");
3977 }
3978
3979 static int video_outputsw_get(void)
3980 {
3981 int status = 0;
3982 int i;
3983
3984 switch (video_supported) {
3985 case TPACPI_VIDEO_570:
3986 if (!acpi_evalf(NULL, &i, "\\_SB.PHS", "dd",
3987 TP_ACPI_VIDEO_570_PHSCMD))
3988 return -EIO;
3989 status = i & TP_ACPI_VIDEO_570_PHSMASK;
3990 break;
3991 case TPACPI_VIDEO_770:
3992 if (!acpi_evalf(NULL, &i, "\\VCDL", "d"))
3993 return -EIO;
3994 if (i)
3995 status |= TP_ACPI_VIDEO_S_LCD;
3996 if (!acpi_evalf(NULL, &i, "\\VCDC", "d"))
3997 return -EIO;
3998 if (i)
3999 status |= TP_ACPI_VIDEO_S_CRT;
4000 break;
4001 case TPACPI_VIDEO_NEW:
4002 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 1) ||
4003 !acpi_evalf(NULL, &i, "\\VCDC", "d"))
4004 return -EIO;
4005 if (i)
4006 status |= TP_ACPI_VIDEO_S_CRT;
4007
4008 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0) ||
4009 !acpi_evalf(NULL, &i, "\\VCDL", "d"))
4010 return -EIO;
4011 if (i)
4012 status |= TP_ACPI_VIDEO_S_LCD;
4013 if (!acpi_evalf(NULL, &i, "\\VCDD", "d"))
4014 return -EIO;
4015 if (i)
4016 status |= TP_ACPI_VIDEO_S_DVI;
4017 break;
4018 default:
4019 return -ENOSYS;
4020 }
4021
4022 return status;
4023 }
4024
4025 static int video_outputsw_set(int status)
4026 {
4027 int autosw;
4028 int res = 0;
4029
4030 switch (video_supported) {
4031 case TPACPI_VIDEO_570:
4032 res = acpi_evalf(NULL, NULL,
4033 "\\_SB.PHS2", "vdd",
4034 TP_ACPI_VIDEO_570_PHS2CMD,
4035 status | TP_ACPI_VIDEO_570_PHS2SET);
4036 break;
4037 case TPACPI_VIDEO_770:
4038 autosw = video_autosw_get();
4039 if (autosw < 0)
4040 return autosw;
4041
4042 res = video_autosw_set(1);
4043 if (res)
4044 return res;
4045 res = acpi_evalf(vid_handle, NULL,
4046 "ASWT", "vdd", status * 0x100, 0);
4047 if (!autosw && video_autosw_set(autosw)) {
4048 printk(TPACPI_ERR
4049 "video auto-switch left enabled due to error\n");
4050 return -EIO;
4051 }
4052 break;
4053 case TPACPI_VIDEO_NEW:
4054 res = acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0x80) &&
4055 acpi_evalf(NULL, NULL, "\\VSDS", "vdd", status, 1);
4056 break;
4057 default:
4058 return -ENOSYS;
4059 }
4060
4061 return (res)? 0 : -EIO;
4062 }
4063
4064 static int video_autosw_get(void)
4065 {
4066 int autosw = 0;
4067
4068 switch (video_supported) {
4069 case TPACPI_VIDEO_570:
4070 if (!acpi_evalf(vid_handle, &autosw, "SWIT", "d"))
4071 return -EIO;
4072 break;
4073 case TPACPI_VIDEO_770:
4074 case TPACPI_VIDEO_NEW:
4075 if (!acpi_evalf(vid_handle, &autosw, "^VDEE", "d"))
4076 return -EIO;
4077 break;
4078 default:
4079 return -ENOSYS;
4080 }
4081
4082 return autosw & 1;
4083 }
4084
4085 static int video_autosw_set(int enable)
4086 {
4087 if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", (enable)? 1 : 0))
4088 return -EIO;
4089 return 0;
4090 }
4091
4092 static int video_outputsw_cycle(void)
4093 {
4094 int autosw = video_autosw_get();
4095 int res;
4096
4097 if (autosw < 0)
4098 return autosw;
4099
4100 switch (video_supported) {
4101 case TPACPI_VIDEO_570:
4102 res = video_autosw_set(1);
4103 if (res)
4104 return res;
4105 res = acpi_evalf(ec_handle, NULL, "_Q16", "v");
4106 break;
4107 case TPACPI_VIDEO_770:
4108 case TPACPI_VIDEO_NEW:
4109 res = video_autosw_set(1);
4110 if (res)
4111 return res;
4112 res = acpi_evalf(vid_handle, NULL, "VSWT", "v");
4113 break;
4114 default:
4115 return -ENOSYS;
4116 }
4117 if (!autosw && video_autosw_set(autosw)) {
4118 printk(TPACPI_ERR
4119 "video auto-switch left enabled due to error\n");
4120 return -EIO;
4121 }
4122
4123 return (res)? 0 : -EIO;
4124 }
4125
4126 static int video_expand_toggle(void)
4127 {
4128 switch (video_supported) {
4129 case TPACPI_VIDEO_570:
4130 return acpi_evalf(ec_handle, NULL, "_Q17", "v")?
4131 0 : -EIO;
4132 case TPACPI_VIDEO_770:
4133 return acpi_evalf(vid_handle, NULL, "VEXP", "v")?
4134 0 : -EIO;
4135 case TPACPI_VIDEO_NEW:
4136 return acpi_evalf(NULL, NULL, "\\VEXP", "v")?
4137 0 : -EIO;
4138 default:
4139 return -ENOSYS;
4140 }
4141 /* not reached */
4142 }
4143
4144 static int video_read(char *p)
4145 {
4146 int status, autosw;
4147 int len = 0;
4148
4149 if (video_supported == TPACPI_VIDEO_NONE) {
4150 len += sprintf(p + len, "status:\t\tnot supported\n");
4151 return len;
4152 }
4153
4154 status = video_outputsw_get();
4155 if (status < 0)
4156 return status;
4157
4158 autosw = video_autosw_get();
4159 if (autosw < 0)
4160 return autosw;
4161
4162 len += sprintf(p + len, "status:\t\tsupported\n");
4163 len += sprintf(p + len, "lcd:\t\t%s\n", enabled(status, 0));
4164 len += sprintf(p + len, "crt:\t\t%s\n", enabled(status, 1));
4165 if (video_supported == TPACPI_VIDEO_NEW)
4166 len += sprintf(p + len, "dvi:\t\t%s\n", enabled(status, 3));
4167 len += sprintf(p + len, "auto:\t\t%s\n", enabled(autosw, 0));
4168 len += sprintf(p + len, "commands:\tlcd_enable, lcd_disable\n");
4169 len += sprintf(p + len, "commands:\tcrt_enable, crt_disable\n");
4170 if (video_supported == TPACPI_VIDEO_NEW)
4171 len += sprintf(p + len, "commands:\tdvi_enable, dvi_disable\n");
4172 len += sprintf(p + len, "commands:\tauto_enable, auto_disable\n");
4173 len += sprintf(p + len, "commands:\tvideo_switch, expand_toggle\n");
4174
4175 return len;
4176 }
4177
4178 static int video_write(char *buf)
4179 {
4180 char *cmd;
4181 int enable, disable, status;
4182 int res;
4183
4184 if (video_supported == TPACPI_VIDEO_NONE)
4185 return -ENODEV;
4186
4187 enable = 0;
4188 disable = 0;
4189
4190 while ((cmd = next_cmd(&buf))) {
4191 if (strlencmp(cmd, "lcd_enable") == 0) {
4192 enable |= TP_ACPI_VIDEO_S_LCD;
4193 } else if (strlencmp(cmd, "lcd_disable") == 0) {
4194 disable |= TP_ACPI_VIDEO_S_LCD;
4195 } else if (strlencmp(cmd, "crt_enable") == 0) {
4196 enable |= TP_ACPI_VIDEO_S_CRT;
4197 } else if (strlencmp(cmd, "crt_disable") == 0) {
4198 disable |= TP_ACPI_VIDEO_S_CRT;
4199 } else if (video_supported == TPACPI_VIDEO_NEW &&
4200 strlencmp(cmd, "dvi_enable") == 0) {
4201 enable |= TP_ACPI_VIDEO_S_DVI;
4202 } else if (video_supported == TPACPI_VIDEO_NEW &&
4203 strlencmp(cmd, "dvi_disable") == 0) {
4204 disable |= TP_ACPI_VIDEO_S_DVI;
4205 } else if (strlencmp(cmd, "auto_enable") == 0) {
4206 res = video_autosw_set(1);
4207 if (res)
4208 return res;
4209 } else if (strlencmp(cmd, "auto_disable") == 0) {
4210 res = video_autosw_set(0);
4211 if (res)
4212 return res;
4213 } else if (strlencmp(cmd, "video_switch") == 0) {
4214 res = video_outputsw_cycle();
4215 if (res)
4216 return res;
4217 } else if (strlencmp(cmd, "expand_toggle") == 0) {
4218 res = video_expand_toggle();
4219 if (res)
4220 return res;
4221 } else
4222 return -EINVAL;
4223 }
4224
4225 if (enable || disable) {
4226 status = video_outputsw_get();
4227 if (status < 0)
4228 return status;
4229 res = video_outputsw_set((status & ~disable) | enable);
4230 if (res)
4231 return res;
4232 }
4233
4234 return 0;
4235 }
4236
4237 static struct ibm_struct video_driver_data = {
4238 .name = "video",
4239 .read = video_read,
4240 .write = video_write,
4241 .exit = video_exit,
4242 };
4243
4244 #endif /* CONFIG_THINKPAD_ACPI_VIDEO */
4245
4246 /*************************************************************************
4247 * Light (thinklight) subdriver
4248 */
4249
4250 TPACPI_HANDLE(lght, root, "\\LGHT"); /* A21e, A2xm/p, T20-22, X20-21 */
4251 TPACPI_HANDLE(ledb, ec, "LEDB"); /* G4x */
4252
4253 static int light_get_status(void)
4254 {
4255 int status = 0;
4256
4257 if (tp_features.light_status) {
4258 if (!acpi_evalf(ec_handle, &status, "KBLT", "d"))
4259 return -EIO;
4260 return (!!status);
4261 }
4262
4263 return -ENXIO;
4264 }
4265
4266 static int light_set_status(int status)
4267 {
4268 int rc;
4269
4270 if (tp_features.light) {
4271 if (cmos_handle) {
4272 rc = acpi_evalf(cmos_handle, NULL, NULL, "vd",
4273 (status)?
4274 TP_CMOS_THINKLIGHT_ON :
4275 TP_CMOS_THINKLIGHT_OFF);
4276 } else {
4277 rc = acpi_evalf(lght_handle, NULL, NULL, "vd",
4278 (status)? 1 : 0);
4279 }
4280 return (rc)? 0 : -EIO;
4281 }
4282
4283 return -ENXIO;
4284 }
4285
4286 static void light_set_status_worker(struct work_struct *work)
4287 {
4288 struct tpacpi_led_classdev *data =
4289 container_of(work, struct tpacpi_led_classdev, work);
4290
4291 if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING))
4292 light_set_status((data->new_state != TPACPI_LED_OFF));
4293 }
4294
4295 static void light_sysfs_set(struct led_classdev *led_cdev,
4296 enum led_brightness brightness)
4297 {
4298 struct tpacpi_led_classdev *data =
4299 container_of(led_cdev,
4300 struct tpacpi_led_classdev,
4301 led_classdev);
4302 data->new_state = (brightness != LED_OFF) ?
4303 TPACPI_LED_ON : TPACPI_LED_OFF;
4304 queue_work(tpacpi_wq, &data->work);
4305 }
4306
4307 static enum led_brightness light_sysfs_get(struct led_classdev *led_cdev)
4308 {
4309 return (light_get_status() == 1)? LED_FULL : LED_OFF;
4310 }
4311
4312 static struct tpacpi_led_classdev tpacpi_led_thinklight = {
4313 .led_classdev = {
4314 .name = "tpacpi::thinklight",
4315 .brightness_set = &light_sysfs_set,
4316 .brightness_get = &light_sysfs_get,
4317 }
4318 };
4319
4320 static int __init light_init(struct ibm_init_struct *iibm)
4321 {
4322 int rc;
4323
4324 vdbg_printk(TPACPI_DBG_INIT, "initializing light subdriver\n");
4325
4326 TPACPI_ACPIHANDLE_INIT(ledb);
4327 TPACPI_ACPIHANDLE_INIT(lght);
4328 TPACPI_ACPIHANDLE_INIT(cmos);
4329 INIT_WORK(&tpacpi_led_thinklight.work, light_set_status_worker);
4330
4331 /* light not supported on 570, 600e/x, 770e, 770x, G4x, R30, R31 */
4332 tp_features.light = (cmos_handle || lght_handle) && !ledb_handle;
4333
4334 if (tp_features.light)
4335 /* light status not supported on
4336 570, 600e/x, 770e, 770x, G4x, R30, R31, R32, X20 */
4337 tp_features.light_status =
4338 acpi_evalf(ec_handle, NULL, "KBLT", "qv");
4339
4340 vdbg_printk(TPACPI_DBG_INIT, "light is %s, light status is %s\n",
4341 str_supported(tp_features.light),
4342 str_supported(tp_features.light_status));
4343
4344 if (!tp_features.light)
4345 return 1;
4346
4347 rc = led_classdev_register(&tpacpi_pdev->dev,
4348 &tpacpi_led_thinklight.led_classdev);
4349
4350 if (rc < 0) {
4351 tp_features.light = 0;
4352 tp_features.light_status = 0;
4353 } else {
4354 rc = 0;
4355 }
4356
4357 return rc;
4358 }
4359
4360 static void light_exit(void)
4361 {
4362 led_classdev_unregister(&tpacpi_led_thinklight.led_classdev);
4363 if (work_pending(&tpacpi_led_thinklight.work))
4364 flush_workqueue(tpacpi_wq);
4365 }
4366
4367 static int light_read(char *p)
4368 {
4369 int len = 0;
4370 int status;
4371
4372 if (!tp_features.light) {
4373 len += sprintf(p + len, "status:\t\tnot supported\n");
4374 } else if (!tp_features.light_status) {
4375 len += sprintf(p + len, "status:\t\tunknown\n");
4376 len += sprintf(p + len, "commands:\ton, off\n");
4377 } else {
4378 status = light_get_status();
4379 if (status < 0)
4380 return status;
4381 len += sprintf(p + len, "status:\t\t%s\n", onoff(status, 0));
4382 len += sprintf(p + len, "commands:\ton, off\n");
4383 }
4384
4385 return len;
4386 }
4387
4388 static int light_write(char *buf)
4389 {
4390 char *cmd;
4391 int newstatus = 0;
4392
4393 if (!tp_features.light)
4394 return -ENODEV;
4395
4396 while ((cmd = next_cmd(&buf))) {
4397 if (strlencmp(cmd, "on") == 0) {
4398 newstatus = 1;
4399 } else if (strlencmp(cmd, "off") == 0) {
4400 newstatus = 0;
4401 } else
4402 return -EINVAL;
4403 }
4404
4405 return light_set_status(newstatus);
4406 }
4407
4408 static struct ibm_struct light_driver_data = {
4409 .name = "light",
4410 .read = light_read,
4411 .write = light_write,
4412 .exit = light_exit,
4413 };
4414
4415 /*************************************************************************
4416 * Dock subdriver
4417 */
4418
4419 #ifdef CONFIG_THINKPAD_ACPI_DOCK
4420
4421 static void dock_notify(struct ibm_struct *ibm, u32 event);
4422 static int dock_read(char *p);
4423 static int dock_write(char *buf);
4424
4425 TPACPI_HANDLE(dock, root, "\\_SB.GDCK", /* X30, X31, X40 */
4426 "\\_SB.PCI0.DOCK", /* 600e/x,770e,770x,A2xm/p,T20-22,X20-21 */
4427 "\\_SB.PCI0.PCI1.DOCK", /* all others */
4428 "\\_SB.PCI.ISA.SLCE", /* 570 */
4429 ); /* A21e,G4x,R30,R31,R32,R40,R40e,R50e */
4430
4431 /* don't list other alternatives as we install a notify handler on the 570 */
4432 TPACPI_HANDLE(pci, root, "\\_SB.PCI"); /* 570 */
4433
4434 static const struct acpi_device_id ibm_pci_device_ids[] = {
4435 {PCI_ROOT_HID_STRING, 0},
4436 {"", 0},
4437 };
4438
4439 static struct tp_acpi_drv_struct ibm_dock_acpidriver[2] = {
4440 {
4441 .notify = dock_notify,
4442 .handle = &dock_handle,
4443 .type = ACPI_SYSTEM_NOTIFY,
4444 },
4445 {
4446 /* THIS ONE MUST NEVER BE USED FOR DRIVER AUTOLOADING.
4447 * We just use it to get notifications of dock hotplug
4448 * in very old thinkpads */
4449 .hid = ibm_pci_device_ids,
4450 .notify = dock_notify,
4451 .handle = &pci_handle,
4452 .type = ACPI_SYSTEM_NOTIFY,
4453 },
4454 };
4455
4456 static struct ibm_struct dock_driver_data[2] = {
4457 {
4458 .name = "dock",
4459 .read = dock_read,
4460 .write = dock_write,
4461 .acpi = &ibm_dock_acpidriver[0],
4462 },
4463 {
4464 .name = "dock",
4465 .acpi = &ibm_dock_acpidriver[1],
4466 },
4467 };
4468
4469 #define dock_docked() (_sta(dock_handle) & 1)
4470
4471 static int __init dock_init(struct ibm_init_struct *iibm)
4472 {
4473 vdbg_printk(TPACPI_DBG_INIT, "initializing dock subdriver\n");
4474
4475 TPACPI_ACPIHANDLE_INIT(dock);
4476
4477 vdbg_printk(TPACPI_DBG_INIT, "dock is %s\n",
4478 str_supported(dock_handle != NULL));
4479
4480 return (dock_handle)? 0 : 1;
4481 }
4482
4483 static int __init dock_init2(struct ibm_init_struct *iibm)
4484 {
4485 int dock2_needed;
4486
4487 vdbg_printk(TPACPI_DBG_INIT, "initializing dock subdriver part 2\n");
4488
4489 if (dock_driver_data[0].flags.acpi_driver_registered &&
4490 dock_driver_data[0].flags.acpi_notify_installed) {
4491 TPACPI_ACPIHANDLE_INIT(pci);
4492 dock2_needed = (pci_handle != NULL);
4493 vdbg_printk(TPACPI_DBG_INIT,
4494 "dock PCI handler for the TP 570 is %s\n",
4495 str_supported(dock2_needed));
4496 } else {
4497 vdbg_printk(TPACPI_DBG_INIT,
4498 "dock subdriver part 2 not required\n");
4499 dock2_needed = 0;
4500 }
4501
4502 return (dock2_needed)? 0 : 1;
4503 }
4504
4505 static void dock_notify(struct ibm_struct *ibm, u32 event)
4506 {
4507 int docked = dock_docked();
4508 int pci = ibm->acpi->hid && ibm->acpi->device &&
4509 acpi_match_device_ids(ibm->acpi->device, ibm_pci_device_ids);
4510 int data;
4511
4512 if (event == 1 && !pci) /* 570 */
4513 data = 1; /* button */
4514 else if (event == 1 && pci) /* 570 */
4515 data = 3; /* dock */
4516 else if (event == 3 && docked)
4517 data = 1; /* button */
4518 else if (event == 3 && !docked)
4519 data = 2; /* undock */
4520 else if (event == 0 && docked)
4521 data = 3; /* dock */
4522 else {
4523 printk(TPACPI_ERR "unknown dock event %d, status %d\n",
4524 event, _sta(dock_handle));
4525 data = 0; /* unknown */
4526 }
4527 acpi_bus_generate_proc_event(ibm->acpi->device, event, data);
4528 acpi_bus_generate_netlink_event(ibm->acpi->device->pnp.device_class,
4529 dev_name(&ibm->acpi->device->dev),
4530 event, data);
4531 }
4532
4533 static int dock_read(char *p)
4534 {
4535 int len = 0;
4536 int docked = dock_docked();
4537
4538 if (!dock_handle)
4539 len += sprintf(p + len, "status:\t\tnot supported\n");
4540 else if (!docked)
4541 len += sprintf(p + len, "status:\t\tundocked\n");
4542 else {
4543 len += sprintf(p + len, "status:\t\tdocked\n");
4544 len += sprintf(p + len, "commands:\tdock, undock\n");
4545 }
4546
4547 return len;
4548 }
4549
4550 static int dock_write(char *buf)
4551 {
4552 char *cmd;
4553
4554 if (!dock_docked())
4555 return -ENODEV;
4556
4557 while ((cmd = next_cmd(&buf))) {
4558 if (strlencmp(cmd, "undock") == 0) {
4559 if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 0) ||
4560 !acpi_evalf(dock_handle, NULL, "_EJ0", "vd", 1))
4561 return -EIO;
4562 } else if (strlencmp(cmd, "dock") == 0) {
4563 if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 1))
4564 return -EIO;
4565 } else
4566 return -EINVAL;
4567 }
4568
4569 return 0;
4570 }
4571
4572 #endif /* CONFIG_THINKPAD_ACPI_DOCK */
4573
4574 /*************************************************************************
4575 * Bay subdriver
4576 */
4577
4578 #ifdef CONFIG_THINKPAD_ACPI_BAY
4579
4580 TPACPI_HANDLE(bay, root, "\\_SB.PCI.IDE.SECN.MAST", /* 570 */
4581 "\\_SB.PCI0.IDE0.IDES.IDSM", /* 600e/x, 770e, 770x */
4582 "\\_SB.PCI0.SATA.SCND.MSTR", /* T60, X60, Z60 */
4583 "\\_SB.PCI0.IDE0.SCND.MSTR", /* all others */
4584 ); /* A21e, R30, R31 */
4585 TPACPI_HANDLE(bay_ej, bay, "_EJ3", /* 600e/x, A2xm/p, A3x */
4586 "_EJ0", /* all others */
4587 ); /* 570,A21e,G4x,R30,R31,R32,R40e,R50e */
4588 TPACPI_HANDLE(bay2, root, "\\_SB.PCI0.IDE0.PRIM.SLAV", /* A3x, R32 */
4589 "\\_SB.PCI0.IDE0.IDEP.IDPS", /* 600e/x, 770e, 770x */
4590 ); /* all others */
4591 TPACPI_HANDLE(bay2_ej, bay2, "_EJ3", /* 600e/x, 770e, A3x */
4592 "_EJ0", /* 770x */
4593 ); /* all others */
4594
4595 static int __init bay_init(struct ibm_init_struct *iibm)
4596 {
4597 vdbg_printk(TPACPI_DBG_INIT, "initializing bay subdriver\n");
4598
4599 TPACPI_ACPIHANDLE_INIT(bay);
4600 if (bay_handle)
4601 TPACPI_ACPIHANDLE_INIT(bay_ej);
4602 TPACPI_ACPIHANDLE_INIT(bay2);
4603 if (bay2_handle)
4604 TPACPI_ACPIHANDLE_INIT(bay2_ej);
4605
4606 tp_features.bay_status = bay_handle &&
4607 acpi_evalf(bay_handle, NULL, "_STA", "qv");
4608 tp_features.bay_status2 = bay2_handle &&
4609 acpi_evalf(bay2_handle, NULL, "_STA", "qv");
4610
4611 tp_features.bay_eject = bay_handle && bay_ej_handle &&
4612 (strlencmp(bay_ej_path, "_EJ0") == 0 || experimental);
4613 tp_features.bay_eject2 = bay2_handle && bay2_ej_handle &&
4614 (strlencmp(bay2_ej_path, "_EJ0") == 0 || experimental);
4615
4616 vdbg_printk(TPACPI_DBG_INIT,
4617 "bay 1: status %s, eject %s; bay 2: status %s, eject %s\n",
4618 str_supported(tp_features.bay_status),
4619 str_supported(tp_features.bay_eject),
4620 str_supported(tp_features.bay_status2),
4621 str_supported(tp_features.bay_eject2));
4622
4623 return (tp_features.bay_status || tp_features.bay_eject ||
4624 tp_features.bay_status2 || tp_features.bay_eject2)? 0 : 1;
4625 }
4626
4627 static void bay_notify(struct ibm_struct *ibm, u32 event)
4628 {
4629 acpi_bus_generate_proc_event(ibm->acpi->device, event, 0);
4630 acpi_bus_generate_netlink_event(ibm->acpi->device->pnp.device_class,
4631 dev_name(&ibm->acpi->device->dev),
4632 event, 0);
4633 }
4634
4635 #define bay_occupied(b) (_sta(b##_handle) & 1)
4636
4637 static int bay_read(char *p)
4638 {
4639 int len = 0;
4640 int occupied = bay_occupied(bay);
4641 int occupied2 = bay_occupied(bay2);
4642 int eject, eject2;
4643
4644 len += sprintf(p + len, "status:\t\t%s\n",
4645 tp_features.bay_status ?
4646 (occupied ? "occupied" : "unoccupied") :
4647 "not supported");
4648 if (tp_features.bay_status2)
4649 len += sprintf(p + len, "status2:\t%s\n", occupied2 ?
4650 "occupied" : "unoccupied");
4651
4652 eject = tp_features.bay_eject && occupied;
4653 eject2 = tp_features.bay_eject2 && occupied2;
4654
4655 if (eject && eject2)
4656 len += sprintf(p + len, "commands:\teject, eject2\n");
4657 else if (eject)
4658 len += sprintf(p + len, "commands:\teject\n");
4659 else if (eject2)
4660 len += sprintf(p + len, "commands:\teject2\n");
4661
4662 return len;
4663 }
4664
4665 static int bay_write(char *buf)
4666 {
4667 char *cmd;
4668
4669 if (!tp_features.bay_eject && !tp_features.bay_eject2)
4670 return -ENODEV;
4671
4672 while ((cmd = next_cmd(&buf))) {
4673 if (tp_features.bay_eject && strlencmp(cmd, "eject") == 0) {
4674 if (!acpi_evalf(bay_ej_handle, NULL, NULL, "vd", 1))
4675 return -EIO;
4676 } else if (tp_features.bay_eject2 &&
4677 strlencmp(cmd, "eject2") == 0) {
4678 if (!acpi_evalf(bay2_ej_handle, NULL, NULL, "vd", 1))
4679 return -EIO;
4680 } else
4681 return -EINVAL;
4682 }
4683
4684 return 0;
4685 }
4686
4687 static struct tp_acpi_drv_struct ibm_bay_acpidriver = {
4688 .notify = bay_notify,
4689 .handle = &bay_handle,
4690 .type = ACPI_SYSTEM_NOTIFY,
4691 };
4692
4693 static struct ibm_struct bay_driver_data = {
4694 .name = "bay",
4695 .read = bay_read,
4696 .write = bay_write,
4697 .acpi = &ibm_bay_acpidriver,
4698 };
4699
4700 #endif /* CONFIG_THINKPAD_ACPI_BAY */
4701
4702 /*************************************************************************
4703 * CMOS subdriver
4704 */
4705
4706 /* sysfs cmos_command -------------------------------------------------- */
4707 static ssize_t cmos_command_store(struct device *dev,
4708 struct device_attribute *attr,
4709 const char *buf, size_t count)
4710 {
4711 unsigned long cmos_cmd;
4712 int res;
4713
4714 if (parse_strtoul(buf, 21, &cmos_cmd))
4715 return -EINVAL;
4716
4717 res = issue_thinkpad_cmos_command(cmos_cmd);
4718 return (res)? res : count;
4719 }
4720
4721 static struct device_attribute dev_attr_cmos_command =
4722 __ATTR(cmos_command, S_IWUSR, NULL, cmos_command_store);
4723
4724 /* --------------------------------------------------------------------- */
4725
4726 static int __init cmos_init(struct ibm_init_struct *iibm)
4727 {
4728 int res;
4729
4730 vdbg_printk(TPACPI_DBG_INIT,
4731 "initializing cmos commands subdriver\n");
4732
4733 TPACPI_ACPIHANDLE_INIT(cmos);
4734
4735 vdbg_printk(TPACPI_DBG_INIT, "cmos commands are %s\n",
4736 str_supported(cmos_handle != NULL));
4737
4738 res = device_create_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
4739 if (res)
4740 return res;
4741
4742 return (cmos_handle)? 0 : 1;
4743 }
4744
4745 static void cmos_exit(void)
4746 {
4747 device_remove_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
4748 }
4749
4750 static int cmos_read(char *p)
4751 {
4752 int len = 0;
4753
4754 /* cmos not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
4755 R30, R31, T20-22, X20-21 */
4756 if (!cmos_handle)
4757 len += sprintf(p + len, "status:\t\tnot supported\n");
4758 else {
4759 len += sprintf(p + len, "status:\t\tsupported\n");
4760 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-21)\n");
4761 }
4762
4763 return len;
4764 }
4765
4766 static int cmos_write(char *buf)
4767 {
4768 char *cmd;
4769 int cmos_cmd, res;
4770
4771 while ((cmd = next_cmd(&buf))) {
4772 if (sscanf(cmd, "%u", &cmos_cmd) == 1 &&
4773 cmos_cmd >= 0 && cmos_cmd <= 21) {
4774 /* cmos_cmd set */
4775 } else
4776 return -EINVAL;
4777
4778 res = issue_thinkpad_cmos_command(cmos_cmd);
4779 if (res)
4780 return res;
4781 }
4782
4783 return 0;
4784 }
4785
4786 static struct ibm_struct cmos_driver_data = {
4787 .name = "cmos",
4788 .read = cmos_read,
4789 .write = cmos_write,
4790 .exit = cmos_exit,
4791 };
4792
4793 /*************************************************************************
4794 * LED subdriver
4795 */
4796
4797 enum led_access_mode {
4798 TPACPI_LED_NONE = 0,
4799 TPACPI_LED_570, /* 570 */
4800 TPACPI_LED_OLD, /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
4801 TPACPI_LED_NEW, /* all others */
4802 };
4803
4804 enum { /* For TPACPI_LED_OLD */
4805 TPACPI_LED_EC_HLCL = 0x0c, /* EC reg to get led to power on */
4806 TPACPI_LED_EC_HLBL = 0x0d, /* EC reg to blink a lit led */
4807 TPACPI_LED_EC_HLMS = 0x0e, /* EC reg to select led to command */
4808 };
4809
4810 static enum led_access_mode led_supported;
4811
4812 TPACPI_HANDLE(led, ec, "SLED", /* 570 */
4813 "SYSL", /* 600e/x, 770e, 770x, A21e, A2xm/p, */
4814 /* T20-22, X20-21 */
4815 "LED", /* all others */
4816 ); /* R30, R31 */
4817
4818 #define TPACPI_LED_NUMLEDS 16
4819 static struct tpacpi_led_classdev *tpacpi_leds;
4820 static enum led_status_t tpacpi_led_state_cache[TPACPI_LED_NUMLEDS];
4821 static const char * const tpacpi_led_names[TPACPI_LED_NUMLEDS] = {
4822 /* there's a limit of 19 chars + NULL before 2.6.26 */
4823 "tpacpi::power",
4824 "tpacpi:orange:batt",
4825 "tpacpi:green:batt",
4826 "tpacpi::dock_active",
4827 "tpacpi::bay_active",
4828 "tpacpi::dock_batt",
4829 "tpacpi::unknown_led",
4830 "tpacpi::standby",
4831 "tpacpi::dock_status1",
4832 "tpacpi::dock_status2",
4833 "tpacpi::unknown_led2",
4834 "tpacpi::unknown_led3",
4835 "tpacpi::thinkvantage",
4836 };
4837 #define TPACPI_SAFE_LEDS 0x1081U
4838
4839 static inline bool tpacpi_is_led_restricted(const unsigned int led)
4840 {
4841 #ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS
4842 return false;
4843 #else
4844 return (1U & (TPACPI_SAFE_LEDS >> led)) == 0;
4845 #endif
4846 }
4847
4848 static int led_get_status(const unsigned int led)
4849 {
4850 int status;
4851 enum led_status_t led_s;
4852
4853 switch (led_supported) {
4854 case TPACPI_LED_570:
4855 if (!acpi_evalf(ec_handle,
4856 &status, "GLED", "dd", 1 << led))
4857 return -EIO;
4858 led_s = (status == 0)?
4859 TPACPI_LED_OFF :
4860 ((status == 1)?
4861 TPACPI_LED_ON :
4862 TPACPI_LED_BLINK);
4863 tpacpi_led_state_cache[led] = led_s;
4864 return led_s;
4865 default:
4866 return -ENXIO;
4867 }
4868
4869 /* not reached */
4870 }
4871
4872 static int led_set_status(const unsigned int led,
4873 const enum led_status_t ledstatus)
4874 {
4875 /* off, on, blink. Index is led_status_t */
4876 static const unsigned int led_sled_arg1[] = { 0, 1, 3 };
4877 static const unsigned int led_led_arg1[] = { 0, 0x80, 0xc0 };
4878
4879 int rc = 0;
4880
4881 switch (led_supported) {
4882 case TPACPI_LED_570:
4883 /* 570 */
4884 if (unlikely(led > 7))
4885 return -EINVAL;
4886 if (unlikely(tpacpi_is_led_restricted(led)))
4887 return -EPERM;
4888 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
4889 (1 << led), led_sled_arg1[ledstatus]))
4890 rc = -EIO;
4891 break;
4892 case TPACPI_LED_OLD:
4893 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */
4894 if (unlikely(led > 7))
4895 return -EINVAL;
4896 if (unlikely(tpacpi_is_led_restricted(led)))
4897 return -EPERM;
4898 rc = ec_write(TPACPI_LED_EC_HLMS, (1 << led));
4899 if (rc >= 0)
4900 rc = ec_write(TPACPI_LED_EC_HLBL,
4901 (ledstatus == TPACPI_LED_BLINK) << led);
4902 if (rc >= 0)
4903 rc = ec_write(TPACPI_LED_EC_HLCL,
4904 (ledstatus != TPACPI_LED_OFF) << led);
4905 break;
4906 case TPACPI_LED_NEW:
4907 /* all others */
4908 if (unlikely(led >= TPACPI_LED_NUMLEDS))
4909 return -EINVAL;
4910 if (unlikely(tpacpi_is_led_restricted(led)))
4911 return -EPERM;
4912 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
4913 led, led_led_arg1[ledstatus]))
4914 rc = -EIO;
4915 break;
4916 default:
4917 rc = -ENXIO;
4918 }
4919
4920 if (!rc)
4921 tpacpi_led_state_cache[led] = ledstatus;
4922
4923 return rc;
4924 }
4925
4926 static void led_set_status_worker(struct work_struct *work)
4927 {
4928 struct tpacpi_led_classdev *data =
4929 container_of(work, struct tpacpi_led_classdev, work);
4930
4931 if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING))
4932 led_set_status(data->led, data->new_state);
4933 }
4934
4935 static void led_sysfs_set(struct led_classdev *led_cdev,
4936 enum led_brightness brightness)
4937 {
4938 struct tpacpi_led_classdev *data = container_of(led_cdev,
4939 struct tpacpi_led_classdev, led_classdev);
4940
4941 if (brightness == LED_OFF)
4942 data->new_state = TPACPI_LED_OFF;
4943 else if (tpacpi_led_state_cache[data->led] != TPACPI_LED_BLINK)
4944 data->new_state = TPACPI_LED_ON;
4945 else
4946 data->new_state = TPACPI_LED_BLINK;
4947
4948 queue_work(tpacpi_wq, &data->work);
4949 }
4950
4951 static int led_sysfs_blink_set(struct led_classdev *led_cdev,
4952 unsigned long *delay_on, unsigned long *delay_off)
4953 {
4954 struct tpacpi_led_classdev *data = container_of(led_cdev,
4955 struct tpacpi_led_classdev, led_classdev);
4956
4957 /* Can we choose the flash rate? */
4958 if (*delay_on == 0 && *delay_off == 0) {
4959 /* yes. set them to the hardware blink rate (1 Hz) */
4960 *delay_on = 500; /* ms */
4961 *delay_off = 500; /* ms */
4962 } else if ((*delay_on != 500) || (*delay_off != 500))
4963 return -EINVAL;
4964
4965 data->new_state = TPACPI_LED_BLINK;
4966 queue_work(tpacpi_wq, &data->work);
4967
4968 return 0;
4969 }
4970
4971 static enum led_brightness led_sysfs_get(struct led_classdev *led_cdev)
4972 {
4973 int rc;
4974
4975 struct tpacpi_led_classdev *data = container_of(led_cdev,
4976 struct tpacpi_led_classdev, led_classdev);
4977
4978 rc = led_get_status(data->led);
4979
4980 if (rc == TPACPI_LED_OFF || rc < 0)
4981 rc = LED_OFF; /* no error handling in led class :( */
4982 else
4983 rc = LED_FULL;
4984
4985 return rc;
4986 }
4987
4988 static void led_exit(void)
4989 {
4990 unsigned int i;
4991
4992 for (i = 0; i < TPACPI_LED_NUMLEDS; i++) {
4993 if (tpacpi_leds[i].led_classdev.name)
4994 led_classdev_unregister(&tpacpi_leds[i].led_classdev);
4995 }
4996
4997 kfree(tpacpi_leds);
4998 }
4999
5000 static int __init tpacpi_init_led(unsigned int led)
5001 {
5002 int rc;
5003
5004 tpacpi_leds[led].led = led;
5005
5006 /* LEDs with no name don't get registered */
5007 if (!tpacpi_led_names[led])
5008 return 0;
5009
5010 tpacpi_leds[led].led_classdev.brightness_set = &led_sysfs_set;
5011 tpacpi_leds[led].led_classdev.blink_set = &led_sysfs_blink_set;
5012 if (led_supported == TPACPI_LED_570)
5013 tpacpi_leds[led].led_classdev.brightness_get =
5014 &led_sysfs_get;
5015
5016 tpacpi_leds[led].led_classdev.name = tpacpi_led_names[led];
5017
5018 INIT_WORK(&tpacpi_leds[led].work, led_set_status_worker);
5019
5020 rc = led_classdev_register(&tpacpi_pdev->dev,
5021 &tpacpi_leds[led].led_classdev);
5022 if (rc < 0)
5023 tpacpi_leds[led].led_classdev.name = NULL;
5024
5025 return rc;
5026 }
5027
5028 static const struct tpacpi_quirk led_useful_qtable[] __initconst = {
5029 TPACPI_Q_IBM('1', 'E', 0x009f), /* A30 */
5030 TPACPI_Q_IBM('1', 'N', 0x009f), /* A31 */
5031 TPACPI_Q_IBM('1', 'G', 0x009f), /* A31 */
5032
5033 TPACPI_Q_IBM('1', 'I', 0x0097), /* T30 */
5034 TPACPI_Q_IBM('1', 'R', 0x0097), /* T40, T41, T42, R50, R51 */
5035 TPACPI_Q_IBM('7', '0', 0x0097), /* T43, R52 */
5036 TPACPI_Q_IBM('1', 'Y', 0x0097), /* T43 */
5037 TPACPI_Q_IBM('1', 'W', 0x0097), /* R50e */
5038 TPACPI_Q_IBM('1', 'V', 0x0097), /* R51 */
5039 TPACPI_Q_IBM('7', '8', 0x0097), /* R51e */
5040 TPACPI_Q_IBM('7', '6', 0x0097), /* R52 */
5041
5042 TPACPI_Q_IBM('1', 'K', 0x00bf), /* X30 */
5043 TPACPI_Q_IBM('1', 'Q', 0x00bf), /* X31, X32 */
5044 TPACPI_Q_IBM('1', 'U', 0x00bf), /* X40 */
5045 TPACPI_Q_IBM('7', '4', 0x00bf), /* X41 */
5046 TPACPI_Q_IBM('7', '5', 0x00bf), /* X41t */
5047
5048 TPACPI_Q_IBM('7', '9', 0x1f97), /* T60 (1) */
5049 TPACPI_Q_IBM('7', '7', 0x1f97), /* Z60* (1) */
5050 TPACPI_Q_IBM('7', 'F', 0x1f97), /* Z61* (1) */
5051 TPACPI_Q_IBM('7', 'B', 0x1fb7), /* X60 (1) */
5052
5053 /* (1) - may have excess leds enabled on MSB */
5054
5055 /* Defaults (order matters, keep last, don't reorder!) */
5056 { /* Lenovo */
5057 .vendor = PCI_VENDOR_ID_LENOVO,
5058 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY,
5059 .quirks = 0x1fffU,
5060 },
5061 { /* IBM ThinkPads with no EC version string */
5062 .vendor = PCI_VENDOR_ID_IBM,
5063 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_UNKNOWN,
5064 .quirks = 0x00ffU,
5065 },
5066 { /* IBM ThinkPads with EC version string */
5067 .vendor = PCI_VENDOR_ID_IBM,
5068 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY,
5069 .quirks = 0x00bfU,
5070 },
5071 };
5072
5073 #undef TPACPI_LEDQ_IBM
5074 #undef TPACPI_LEDQ_LNV
5075
5076 static int __init led_init(struct ibm_init_struct *iibm)
5077 {
5078 unsigned int i;
5079 int rc;
5080 unsigned long useful_leds;
5081
5082 vdbg_printk(TPACPI_DBG_INIT, "initializing LED subdriver\n");
5083
5084 TPACPI_ACPIHANDLE_INIT(led);
5085
5086 if (!led_handle)
5087 /* led not supported on R30, R31 */
5088 led_supported = TPACPI_LED_NONE;
5089 else if (strlencmp(led_path, "SLED") == 0)
5090 /* 570 */
5091 led_supported = TPACPI_LED_570;
5092 else if (strlencmp(led_path, "SYSL") == 0)
5093 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
5094 led_supported = TPACPI_LED_OLD;
5095 else
5096 /* all others */
5097 led_supported = TPACPI_LED_NEW;
5098
5099 vdbg_printk(TPACPI_DBG_INIT, "LED commands are %s, mode %d\n",
5100 str_supported(led_supported), led_supported);
5101
5102 if (led_supported == TPACPI_LED_NONE)
5103 return 1;
5104
5105 tpacpi_leds = kzalloc(sizeof(*tpacpi_leds) * TPACPI_LED_NUMLEDS,
5106 GFP_KERNEL);
5107 if (!tpacpi_leds) {
5108 printk(TPACPI_ERR "Out of memory for LED data\n");
5109 return -ENOMEM;
5110 }
5111
5112 useful_leds = tpacpi_check_quirks(led_useful_qtable,
5113 ARRAY_SIZE(led_useful_qtable));
5114
5115 for (i = 0; i < TPACPI_LED_NUMLEDS; i++) {
5116 if (!tpacpi_is_led_restricted(i) &&
5117 test_bit(i, &useful_leds)) {
5118 rc = tpacpi_init_led(i);
5119 if (rc < 0) {
5120 led_exit();
5121 return rc;
5122 }
5123 }
5124 }
5125
5126 #ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS
5127 printk(TPACPI_NOTICE
5128 "warning: userspace override of important "
5129 "firmware LEDs is enabled\n");
5130 #endif
5131 return 0;
5132 }
5133
5134 #define str_led_status(s) \
5135 ((s) == TPACPI_LED_OFF ? "off" : \
5136 ((s) == TPACPI_LED_ON ? "on" : "blinking"))
5137
5138 static int led_read(char *p)
5139 {
5140 int len = 0;
5141
5142 if (!led_supported) {
5143 len += sprintf(p + len, "status:\t\tnot supported\n");
5144 return len;
5145 }
5146 len += sprintf(p + len, "status:\t\tsupported\n");
5147
5148 if (led_supported == TPACPI_LED_570) {
5149 /* 570 */
5150 int i, status;
5151 for (i = 0; i < 8; i++) {
5152 status = led_get_status(i);
5153 if (status < 0)
5154 return -EIO;
5155 len += sprintf(p + len, "%d:\t\t%s\n",
5156 i, str_led_status(status));
5157 }
5158 }
5159
5160 len += sprintf(p + len, "commands:\t"
5161 "<led> on, <led> off, <led> blink (<led> is 0-15)\n");
5162
5163 return len;
5164 }
5165
5166 static int led_write(char *buf)
5167 {
5168 char *cmd;
5169 int led, rc;
5170 enum led_status_t s;
5171
5172 if (!led_supported)
5173 return -ENODEV;
5174
5175 while ((cmd = next_cmd(&buf))) {
5176 if (sscanf(cmd, "%d", &led) != 1 || led < 0 || led > 15)
5177 return -EINVAL;
5178
5179 if (strstr(cmd, "off")) {
5180 s = TPACPI_LED_OFF;
5181 } else if (strstr(cmd, "on")) {
5182 s = TPACPI_LED_ON;
5183 } else if (strstr(cmd, "blink")) {
5184 s = TPACPI_LED_BLINK;
5185 } else {
5186 return -EINVAL;
5187 }
5188
5189 rc = led_set_status(led, s);
5190 if (rc < 0)
5191 return rc;
5192 }
5193
5194 return 0;
5195 }
5196
5197 static struct ibm_struct led_driver_data = {
5198 .name = "led",
5199 .read = led_read,
5200 .write = led_write,
5201 .exit = led_exit,
5202 };
5203
5204 /*************************************************************************
5205 * Beep subdriver
5206 */
5207
5208 TPACPI_HANDLE(beep, ec, "BEEP"); /* all except R30, R31 */
5209
5210 #define TPACPI_BEEP_Q1 0x0001
5211
5212 static const struct tpacpi_quirk beep_quirk_table[] __initconst = {
5213 TPACPI_Q_IBM('I', 'M', TPACPI_BEEP_Q1), /* 570 */
5214 TPACPI_Q_IBM('I', 'U', TPACPI_BEEP_Q1), /* 570E - unverified */
5215 };
5216
5217 static int __init beep_init(struct ibm_init_struct *iibm)
5218 {
5219 unsigned long quirks;
5220
5221 vdbg_printk(TPACPI_DBG_INIT, "initializing beep subdriver\n");
5222
5223 TPACPI_ACPIHANDLE_INIT(beep);
5224
5225 vdbg_printk(TPACPI_DBG_INIT, "beep is %s\n",
5226 str_supported(beep_handle != NULL));
5227
5228 quirks = tpacpi_check_quirks(beep_quirk_table,
5229 ARRAY_SIZE(beep_quirk_table));
5230
5231 tp_features.beep_needs_two_args = !!(quirks & TPACPI_BEEP_Q1);
5232
5233 return (beep_handle)? 0 : 1;
5234 }
5235
5236 static int beep_read(char *p)
5237 {
5238 int len = 0;
5239
5240 if (!beep_handle)
5241 len += sprintf(p + len, "status:\t\tnot supported\n");
5242 else {
5243 len += sprintf(p + len, "status:\t\tsupported\n");
5244 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-17)\n");
5245 }
5246
5247 return len;
5248 }
5249
5250 static int beep_write(char *buf)
5251 {
5252 char *cmd;
5253 int beep_cmd;
5254
5255 if (!beep_handle)
5256 return -ENODEV;
5257
5258 while ((cmd = next_cmd(&buf))) {
5259 if (sscanf(cmd, "%u", &beep_cmd) == 1 &&
5260 beep_cmd >= 0 && beep_cmd <= 17) {
5261 /* beep_cmd set */
5262 } else
5263 return -EINVAL;
5264 if (tp_features.beep_needs_two_args) {
5265 if (!acpi_evalf(beep_handle, NULL, NULL, "vdd",
5266 beep_cmd, 0))
5267 return -EIO;
5268 } else {
5269 if (!acpi_evalf(beep_handle, NULL, NULL, "vd",
5270 beep_cmd))
5271 return -EIO;
5272 }
5273 }
5274
5275 return 0;
5276 }
5277
5278 static struct ibm_struct beep_driver_data = {
5279 .name = "beep",
5280 .read = beep_read,
5281 .write = beep_write,
5282 };
5283
5284 /*************************************************************************
5285 * Thermal subdriver
5286 */
5287
5288 enum thermal_access_mode {
5289 TPACPI_THERMAL_NONE = 0, /* No thermal support */
5290 TPACPI_THERMAL_ACPI_TMP07, /* Use ACPI TMP0-7 */
5291 TPACPI_THERMAL_ACPI_UPDT, /* Use ACPI TMP0-7 with UPDT */
5292 TPACPI_THERMAL_TPEC_8, /* Use ACPI EC regs, 8 sensors */
5293 TPACPI_THERMAL_TPEC_16, /* Use ACPI EC regs, 16 sensors */
5294 };
5295
5296 enum { /* TPACPI_THERMAL_TPEC_* */
5297 TP_EC_THERMAL_TMP0 = 0x78, /* ACPI EC regs TMP 0..7 */
5298 TP_EC_THERMAL_TMP8 = 0xC0, /* ACPI EC regs TMP 8..15 */
5299 TP_EC_THERMAL_TMP_NA = -128, /* ACPI EC sensor not available */
5300 };
5301
5302 #define TPACPI_MAX_THERMAL_SENSORS 16 /* Max thermal sensors supported */
5303 struct ibm_thermal_sensors_struct {
5304 s32 temp[TPACPI_MAX_THERMAL_SENSORS];
5305 };
5306
5307 static enum thermal_access_mode thermal_read_mode;
5308
5309 /* idx is zero-based */
5310 static int thermal_get_sensor(int idx, s32 *value)
5311 {
5312 int t;
5313 s8 tmp;
5314 char tmpi[5];
5315
5316 t = TP_EC_THERMAL_TMP0;
5317
5318 switch (thermal_read_mode) {
5319 #if TPACPI_MAX_THERMAL_SENSORS >= 16
5320 case TPACPI_THERMAL_TPEC_16:
5321 if (idx >= 8 && idx <= 15) {
5322 t = TP_EC_THERMAL_TMP8;
5323 idx -= 8;
5324 }
5325 /* fallthrough */
5326 #endif
5327 case TPACPI_THERMAL_TPEC_8:
5328 if (idx <= 7) {
5329 if (!acpi_ec_read(t + idx, &tmp))
5330 return -EIO;
5331 *value = tmp * 1000;
5332 return 0;
5333 }
5334 break;
5335
5336 case TPACPI_THERMAL_ACPI_UPDT:
5337 if (idx <= 7) {
5338 snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
5339 if (!acpi_evalf(ec_handle, NULL, "UPDT", "v"))
5340 return -EIO;
5341 if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
5342 return -EIO;
5343 *value = (t - 2732) * 100;
5344 return 0;
5345 }
5346 break;
5347
5348 case TPACPI_THERMAL_ACPI_TMP07:
5349 if (idx <= 7) {
5350 snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
5351 if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
5352 return -EIO;
5353 if (t > 127 || t < -127)
5354 t = TP_EC_THERMAL_TMP_NA;
5355 *value = t * 1000;
5356 return 0;
5357 }
5358 break;
5359
5360 case TPACPI_THERMAL_NONE:
5361 default:
5362 return -ENOSYS;
5363 }
5364
5365 return -EINVAL;
5366 }
5367
5368 static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s)
5369 {
5370 int res, i;
5371 int n;
5372
5373 n = 8;
5374 i = 0;
5375
5376 if (!s)
5377 return -EINVAL;
5378
5379 if (thermal_read_mode == TPACPI_THERMAL_TPEC_16)
5380 n = 16;
5381
5382 for (i = 0 ; i < n; i++) {
5383 res = thermal_get_sensor(i, &s->temp[i]);
5384 if (res)
5385 return res;
5386 }
5387
5388 return n;
5389 }
5390
5391 /* sysfs temp##_input -------------------------------------------------- */
5392
5393 static ssize_t thermal_temp_input_show(struct device *dev,
5394 struct device_attribute *attr,
5395 char *buf)
5396 {
5397 struct sensor_device_attribute *sensor_attr =
5398 to_sensor_dev_attr(attr);
5399 int idx = sensor_attr->index;
5400 s32 value;
5401 int res;
5402
5403 res = thermal_get_sensor(idx, &value);
5404 if (res)
5405 return res;
5406 if (value == TP_EC_THERMAL_TMP_NA * 1000)
5407 return -ENXIO;
5408
5409 return snprintf(buf, PAGE_SIZE, "%d\n", value);
5410 }
5411
5412 #define THERMAL_SENSOR_ATTR_TEMP(_idxA, _idxB) \
5413 SENSOR_ATTR(temp##_idxA##_input, S_IRUGO, \
5414 thermal_temp_input_show, NULL, _idxB)
5415
5416 static struct sensor_device_attribute sensor_dev_attr_thermal_temp_input[] = {
5417 THERMAL_SENSOR_ATTR_TEMP(1, 0),
5418 THERMAL_SENSOR_ATTR_TEMP(2, 1),
5419 THERMAL_SENSOR_ATTR_TEMP(3, 2),
5420 THERMAL_SENSOR_ATTR_TEMP(4, 3),
5421 THERMAL_SENSOR_ATTR_TEMP(5, 4),
5422 THERMAL_SENSOR_ATTR_TEMP(6, 5),
5423 THERMAL_SENSOR_ATTR_TEMP(7, 6),
5424 THERMAL_SENSOR_ATTR_TEMP(8, 7),
5425 THERMAL_SENSOR_ATTR_TEMP(9, 8),
5426 THERMAL_SENSOR_ATTR_TEMP(10, 9),
5427 THERMAL_SENSOR_ATTR_TEMP(11, 10),
5428 THERMAL_SENSOR_ATTR_TEMP(12, 11),
5429 THERMAL_SENSOR_ATTR_TEMP(13, 12),
5430 THERMAL_SENSOR_ATTR_TEMP(14, 13),
5431 THERMAL_SENSOR_ATTR_TEMP(15, 14),
5432 THERMAL_SENSOR_ATTR_TEMP(16, 15),
5433 };
5434
5435 #define THERMAL_ATTRS(X) \
5436 &sensor_dev_attr_thermal_temp_input[X].dev_attr.attr
5437
5438 static struct attribute *thermal_temp_input_attr[] = {
5439 THERMAL_ATTRS(8),
5440 THERMAL_ATTRS(9),
5441 THERMAL_ATTRS(10),
5442 THERMAL_ATTRS(11),
5443 THERMAL_ATTRS(12),
5444 THERMAL_ATTRS(13),
5445 THERMAL_ATTRS(14),
5446 THERMAL_ATTRS(15),
5447 THERMAL_ATTRS(0),
5448 THERMAL_ATTRS(1),
5449 THERMAL_ATTRS(2),
5450 THERMAL_ATTRS(3),
5451 THERMAL_ATTRS(4),
5452 THERMAL_ATTRS(5),
5453 THERMAL_ATTRS(6),
5454 THERMAL_ATTRS(7),
5455 NULL
5456 };
5457
5458 static const struct attribute_group thermal_temp_input16_group = {
5459 .attrs = thermal_temp_input_attr
5460 };
5461
5462 static const struct attribute_group thermal_temp_input8_group = {
5463 .attrs = &thermal_temp_input_attr[8]
5464 };
5465
5466 #undef THERMAL_SENSOR_ATTR_TEMP
5467 #undef THERMAL_ATTRS
5468
5469 /* --------------------------------------------------------------------- */
5470
5471 static int __init thermal_init(struct ibm_init_struct *iibm)
5472 {
5473 u8 t, ta1, ta2;
5474 int i;
5475 int acpi_tmp7;
5476 int res;
5477
5478 vdbg_printk(TPACPI_DBG_INIT, "initializing thermal subdriver\n");
5479
5480 acpi_tmp7 = acpi_evalf(ec_handle, NULL, "TMP7", "qv");
5481
5482 if (thinkpad_id.ec_model) {
5483 /*
5484 * Direct EC access mode: sensors at registers
5485 * 0x78-0x7F, 0xC0-0xC7. Registers return 0x00 for
5486 * non-implemented, thermal sensors return 0x80 when
5487 * not available
5488 */
5489
5490 ta1 = ta2 = 0;
5491 for (i = 0; i < 8; i++) {
5492 if (acpi_ec_read(TP_EC_THERMAL_TMP0 + i, &t)) {
5493 ta1 |= t;
5494 } else {
5495 ta1 = 0;
5496 break;
5497 }
5498 if (acpi_ec_read(TP_EC_THERMAL_TMP8 + i, &t)) {
5499 ta2 |= t;
5500 } else {
5501 ta1 = 0;
5502 break;
5503 }
5504 }
5505 if (ta1 == 0) {
5506 /* This is sheer paranoia, but we handle it anyway */
5507 if (acpi_tmp7) {
5508 printk(TPACPI_ERR
5509 "ThinkPad ACPI EC access misbehaving, "
5510 "falling back to ACPI TMPx access "
5511 "mode\n");
5512 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
5513 } else {
5514 printk(TPACPI_ERR
5515 "ThinkPad ACPI EC access misbehaving, "
5516 "disabling thermal sensors access\n");
5517 thermal_read_mode = TPACPI_THERMAL_NONE;
5518 }
5519 } else {
5520 thermal_read_mode =
5521 (ta2 != 0) ?
5522 TPACPI_THERMAL_TPEC_16 : TPACPI_THERMAL_TPEC_8;
5523 }
5524 } else if (acpi_tmp7) {
5525 if (acpi_evalf(ec_handle, NULL, "UPDT", "qv")) {
5526 /* 600e/x, 770e, 770x */
5527 thermal_read_mode = TPACPI_THERMAL_ACPI_UPDT;
5528 } else {
5529 /* Standard ACPI TMPx access, max 8 sensors */
5530 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
5531 }
5532 } else {
5533 /* temperatures not supported on 570, G4x, R30, R31, R32 */
5534 thermal_read_mode = TPACPI_THERMAL_NONE;
5535 }
5536
5537 vdbg_printk(TPACPI_DBG_INIT, "thermal is %s, mode %d\n",
5538 str_supported(thermal_read_mode != TPACPI_THERMAL_NONE),
5539 thermal_read_mode);
5540
5541 switch (thermal_read_mode) {
5542 case TPACPI_THERMAL_TPEC_16:
5543 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
5544 &thermal_temp_input16_group);
5545 if (res)
5546 return res;
5547 break;
5548 case TPACPI_THERMAL_TPEC_8:
5549 case TPACPI_THERMAL_ACPI_TMP07:
5550 case TPACPI_THERMAL_ACPI_UPDT:
5551 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
5552 &thermal_temp_input8_group);
5553 if (res)
5554 return res;
5555 break;
5556 case TPACPI_THERMAL_NONE:
5557 default:
5558 return 1;
5559 }
5560
5561 return 0;
5562 }
5563
5564 static void thermal_exit(void)
5565 {
5566 switch (thermal_read_mode) {
5567 case TPACPI_THERMAL_TPEC_16:
5568 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
5569 &thermal_temp_input16_group);
5570 break;
5571 case TPACPI_THERMAL_TPEC_8:
5572 case TPACPI_THERMAL_ACPI_TMP07:
5573 case TPACPI_THERMAL_ACPI_UPDT:
5574 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
5575 &thermal_temp_input16_group);
5576 break;
5577 case TPACPI_THERMAL_NONE:
5578 default:
5579 break;
5580 }
5581 }
5582
5583 static int thermal_read(char *p)
5584 {
5585 int len = 0;
5586 int n, i;
5587 struct ibm_thermal_sensors_struct t;
5588
5589 n = thermal_get_sensors(&t);
5590 if (unlikely(n < 0))
5591 return n;
5592
5593 len += sprintf(p + len, "temperatures:\t");
5594
5595 if (n > 0) {
5596 for (i = 0; i < (n - 1); i++)
5597 len += sprintf(p + len, "%d ", t.temp[i] / 1000);
5598 len += sprintf(p + len, "%d\n", t.temp[i] / 1000);
5599 } else
5600 len += sprintf(p + len, "not supported\n");
5601
5602 return len;
5603 }
5604
5605 static struct ibm_struct thermal_driver_data = {
5606 .name = "thermal",
5607 .read = thermal_read,
5608 .exit = thermal_exit,
5609 };
5610
5611 /*************************************************************************
5612 * EC Dump subdriver
5613 */
5614
5615 static u8 ecdump_regs[256];
5616
5617 static int ecdump_read(char *p)
5618 {
5619 int len = 0;
5620 int i, j;
5621 u8 v;
5622
5623 len += sprintf(p + len, "EC "
5624 " +00 +01 +02 +03 +04 +05 +06 +07"
5625 " +08 +09 +0a +0b +0c +0d +0e +0f\n");
5626 for (i = 0; i < 256; i += 16) {
5627 len += sprintf(p + len, "EC 0x%02x:", i);
5628 for (j = 0; j < 16; j++) {
5629 if (!acpi_ec_read(i + j, &v))
5630 break;
5631 if (v != ecdump_regs[i + j])
5632 len += sprintf(p + len, " *%02x", v);
5633 else
5634 len += sprintf(p + len, " %02x", v);
5635 ecdump_regs[i + j] = v;
5636 }
5637 len += sprintf(p + len, "\n");
5638 if (j != 16)
5639 break;
5640 }
5641
5642 /* These are way too dangerous to advertise openly... */
5643 #if 0
5644 len += sprintf(p + len, "commands:\t0x<offset> 0x<value>"
5645 " (<offset> is 00-ff, <value> is 00-ff)\n");
5646 len += sprintf(p + len, "commands:\t0x<offset> <value> "
5647 " (<offset> is 00-ff, <value> is 0-255)\n");
5648 #endif
5649 return len;
5650 }
5651
5652 static int ecdump_write(char *buf)
5653 {
5654 char *cmd;
5655 int i, v;
5656
5657 while ((cmd = next_cmd(&buf))) {
5658 if (sscanf(cmd, "0x%x 0x%x", &i, &v) == 2) {
5659 /* i and v set */
5660 } else if (sscanf(cmd, "0x%x %u", &i, &v) == 2) {
5661 /* i and v set */
5662 } else
5663 return -EINVAL;
5664 if (i >= 0 && i < 256 && v >= 0 && v < 256) {
5665 if (!acpi_ec_write(i, v))
5666 return -EIO;
5667 } else
5668 return -EINVAL;
5669 }
5670
5671 return 0;
5672 }
5673
5674 static struct ibm_struct ecdump_driver_data = {
5675 .name = "ecdump",
5676 .read = ecdump_read,
5677 .write = ecdump_write,
5678 .flags.experimental = 1,
5679 };
5680
5681 /*************************************************************************
5682 * Backlight/brightness subdriver
5683 */
5684
5685 #define TPACPI_BACKLIGHT_DEV_NAME "thinkpad_screen"
5686
5687 /*
5688 * ThinkPads can read brightness from two places: EC HBRV (0x31), or
5689 * CMOS NVRAM byte 0x5E, bits 0-3.
5690 *
5691 * EC HBRV (0x31) has the following layout
5692 * Bit 7: unknown function
5693 * Bit 6: unknown function
5694 * Bit 5: Z: honour scale changes, NZ: ignore scale changes
5695 * Bit 4: must be set to zero to avoid problems
5696 * Bit 3-0: backlight brightness level
5697 *
5698 * brightness_get_raw returns status data in the HBRV layout
5699 *
5700 * WARNING: The X61 has been verified to use HBRV for something else, so
5701 * this should be used _only_ on IBM ThinkPads, and maybe with some careful
5702 * testing on the very early *60 Lenovo models...
5703 */
5704
5705 enum {
5706 TP_EC_BACKLIGHT = 0x31,
5707
5708 /* TP_EC_BACKLIGHT bitmasks */
5709 TP_EC_BACKLIGHT_LVLMSK = 0x1F,
5710 TP_EC_BACKLIGHT_CMDMSK = 0xE0,
5711 TP_EC_BACKLIGHT_MAPSW = 0x20,
5712 };
5713
5714 enum tpacpi_brightness_access_mode {
5715 TPACPI_BRGHT_MODE_AUTO = 0, /* Not implemented yet */
5716 TPACPI_BRGHT_MODE_EC, /* EC control */
5717 TPACPI_BRGHT_MODE_UCMS_STEP, /* UCMS step-based control */
5718 TPACPI_BRGHT_MODE_ECNVRAM, /* EC control w/ NVRAM store */
5719 TPACPI_BRGHT_MODE_MAX
5720 };
5721
5722 static struct backlight_device *ibm_backlight_device;
5723
5724 static enum tpacpi_brightness_access_mode brightness_mode =
5725 TPACPI_BRGHT_MODE_MAX;
5726
5727 static unsigned int brightness_enable = 2; /* 2 = auto, 0 = no, 1 = yes */
5728
5729 static struct mutex brightness_mutex;
5730
5731 /* NVRAM brightness access,
5732 * call with brightness_mutex held! */
5733 static unsigned int tpacpi_brightness_nvram_get(void)
5734 {
5735 u8 lnvram;
5736
5737 lnvram = (nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS)
5738 & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
5739 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
5740 lnvram &= (tp_features.bright_16levels) ? 0x0f : 0x07;
5741
5742 return lnvram;
5743 }
5744
5745 static void tpacpi_brightness_checkpoint_nvram(void)
5746 {
5747 u8 lec = 0;
5748 u8 b_nvram;
5749
5750 if (brightness_mode != TPACPI_BRGHT_MODE_ECNVRAM)
5751 return;
5752
5753 vdbg_printk(TPACPI_DBG_BRGHT,
5754 "trying to checkpoint backlight level to NVRAM...\n");
5755
5756 if (mutex_lock_killable(&brightness_mutex) < 0)
5757 return;
5758
5759 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
5760 goto unlock;
5761 lec &= TP_EC_BACKLIGHT_LVLMSK;
5762 b_nvram = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS);
5763
5764 if (lec != ((b_nvram & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
5765 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS)) {
5766 /* NVRAM needs update */
5767 b_nvram &= ~(TP_NVRAM_MASK_LEVEL_BRIGHTNESS <<
5768 TP_NVRAM_POS_LEVEL_BRIGHTNESS);
5769 b_nvram |= lec;
5770 nvram_write_byte(b_nvram, TP_NVRAM_ADDR_BRIGHTNESS);
5771 dbg_printk(TPACPI_DBG_BRGHT,
5772 "updated NVRAM backlight level to %u (0x%02x)\n",
5773 (unsigned int) lec, (unsigned int) b_nvram);
5774 } else
5775 vdbg_printk(TPACPI_DBG_BRGHT,
5776 "NVRAM backlight level already is %u (0x%02x)\n",
5777 (unsigned int) lec, (unsigned int) b_nvram);
5778
5779 unlock:
5780 mutex_unlock(&brightness_mutex);
5781 }
5782
5783
5784 /* call with brightness_mutex held! */
5785 static int tpacpi_brightness_get_raw(int *status)
5786 {
5787 u8 lec = 0;
5788
5789 switch (brightness_mode) {
5790 case TPACPI_BRGHT_MODE_UCMS_STEP:
5791 *status = tpacpi_brightness_nvram_get();
5792 return 0;
5793 case TPACPI_BRGHT_MODE_EC:
5794 case TPACPI_BRGHT_MODE_ECNVRAM:
5795 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
5796 return -EIO;
5797 *status = lec;
5798 return 0;
5799 default:
5800 return -ENXIO;
5801 }
5802 }
5803
5804 /* call with brightness_mutex held! */
5805 /* do NOT call with illegal backlight level value */
5806 static int tpacpi_brightness_set_ec(unsigned int value)
5807 {
5808 u8 lec = 0;
5809
5810 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
5811 return -EIO;
5812
5813 if (unlikely(!acpi_ec_write(TP_EC_BACKLIGHT,
5814 (lec & TP_EC_BACKLIGHT_CMDMSK) |
5815 (value & TP_EC_BACKLIGHT_LVLMSK))))
5816 return -EIO;
5817
5818 return 0;
5819 }
5820
5821 /* call with brightness_mutex held! */
5822 static int tpacpi_brightness_set_ucmsstep(unsigned int value)
5823 {
5824 int cmos_cmd, inc;
5825 unsigned int current_value, i;
5826
5827 current_value = tpacpi_brightness_nvram_get();
5828
5829 if (value == current_value)
5830 return 0;
5831
5832 cmos_cmd = (value > current_value) ?
5833 TP_CMOS_BRIGHTNESS_UP :
5834 TP_CMOS_BRIGHTNESS_DOWN;
5835 inc = (value > current_value) ? 1 : -1;
5836
5837 for (i = current_value; i != value; i += inc)
5838 if (issue_thinkpad_cmos_command(cmos_cmd))
5839 return -EIO;
5840
5841 return 0;
5842 }
5843
5844 /* May return EINTR which can always be mapped to ERESTARTSYS */
5845 static int brightness_set(unsigned int value)
5846 {
5847 int res;
5848
5849 if (value > ((tp_features.bright_16levels)? 15 : 7) ||
5850 value < 0)
5851 return -EINVAL;
5852
5853 vdbg_printk(TPACPI_DBG_BRGHT,
5854 "set backlight level to %d\n", value);
5855
5856 res = mutex_lock_killable(&brightness_mutex);
5857 if (res < 0)
5858 return res;
5859
5860 switch (brightness_mode) {
5861 case TPACPI_BRGHT_MODE_EC:
5862 case TPACPI_BRGHT_MODE_ECNVRAM:
5863 res = tpacpi_brightness_set_ec(value);
5864 break;
5865 case TPACPI_BRGHT_MODE_UCMS_STEP:
5866 res = tpacpi_brightness_set_ucmsstep(value);
5867 break;
5868 default:
5869 res = -ENXIO;
5870 }
5871
5872 mutex_unlock(&brightness_mutex);
5873 return res;
5874 }
5875
5876 /* sysfs backlight class ----------------------------------------------- */
5877
5878 static int brightness_update_status(struct backlight_device *bd)
5879 {
5880 unsigned int level =
5881 (bd->props.fb_blank == FB_BLANK_UNBLANK &&
5882 bd->props.power == FB_BLANK_UNBLANK) ?
5883 bd->props.brightness : 0;
5884
5885 dbg_printk(TPACPI_DBG_BRGHT,
5886 "backlight: attempt to set level to %d\n",
5887 level);
5888
5889 /* it is the backlight class's job (caller) to handle
5890 * EINTR and other errors properly */
5891 return brightness_set(level);
5892 }
5893
5894 static int brightness_get(struct backlight_device *bd)
5895 {
5896 int status, res;
5897
5898 res = mutex_lock_killable(&brightness_mutex);
5899 if (res < 0)
5900 return 0;
5901
5902 res = tpacpi_brightness_get_raw(&status);
5903
5904 mutex_unlock(&brightness_mutex);
5905
5906 if (res < 0)
5907 return 0;
5908
5909 return status & TP_EC_BACKLIGHT_LVLMSK;
5910 }
5911
5912 static struct backlight_ops ibm_backlight_data = {
5913 .get_brightness = brightness_get,
5914 .update_status = brightness_update_status,
5915 };
5916
5917 /* --------------------------------------------------------------------- */
5918
5919 static int __init brightness_init(struct ibm_init_struct *iibm)
5920 {
5921 int b;
5922
5923 vdbg_printk(TPACPI_DBG_INIT, "initializing brightness subdriver\n");
5924
5925 mutex_init(&brightness_mutex);
5926
5927 /*
5928 * We always attempt to detect acpi support, so as to switch
5929 * Lenovo Vista BIOS to ACPI brightness mode even if we are not
5930 * going to publish a backlight interface
5931 */
5932 b = tpacpi_check_std_acpi_brightness_support();
5933 if (b > 0) {
5934
5935 if (acpi_video_backlight_support()) {
5936 if (brightness_enable > 1) {
5937 printk(TPACPI_NOTICE
5938 "Standard ACPI backlight interface "
5939 "available, not loading native one.\n");
5940 return 1;
5941 } else if (brightness_enable == 1) {
5942 printk(TPACPI_NOTICE
5943 "Backlight control force enabled, even if standard "
5944 "ACPI backlight interface is available\n");
5945 }
5946 } else {
5947 if (brightness_enable > 1) {
5948 printk(TPACPI_NOTICE
5949 "Standard ACPI backlight interface not "
5950 "available, thinkpad_acpi native "
5951 "brightness control enabled\n");
5952 }
5953 }
5954 }
5955
5956 if (!brightness_enable) {
5957 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT,
5958 "brightness support disabled by "
5959 "module parameter\n");
5960 return 1;
5961 }
5962
5963 if (b > 16) {
5964 printk(TPACPI_ERR
5965 "Unsupported brightness interface, "
5966 "please contact %s\n", TPACPI_MAIL);
5967 return 1;
5968 }
5969 if (b == 16)
5970 tp_features.bright_16levels = 1;
5971
5972 /*
5973 * Check for module parameter bogosity, note that we
5974 * init brightness_mode to TPACPI_BRGHT_MODE_MAX in order to be
5975 * able to detect "unspecified"
5976 */
5977 if (brightness_mode > TPACPI_BRGHT_MODE_MAX)
5978 return -EINVAL;
5979
5980 /* TPACPI_BRGHT_MODE_AUTO not implemented yet, just use default */
5981 if (brightness_mode == TPACPI_BRGHT_MODE_AUTO ||
5982 brightness_mode == TPACPI_BRGHT_MODE_MAX) {
5983 if (thinkpad_id.vendor == PCI_VENDOR_ID_IBM) {
5984 /*
5985 * IBM models that define HBRV probably have
5986 * EC-based backlight level control
5987 */
5988 if (acpi_evalf(ec_handle, NULL, "HBRV", "qd"))
5989 /* T40-T43, R50-R52, R50e, R51e, X31-X41 */
5990 brightness_mode = TPACPI_BRGHT_MODE_ECNVRAM;
5991 else
5992 /* all other IBM ThinkPads */
5993 brightness_mode = TPACPI_BRGHT_MODE_UCMS_STEP;
5994 } else
5995 /* All Lenovo ThinkPads */
5996 brightness_mode = TPACPI_BRGHT_MODE_UCMS_STEP;
5997
5998 dbg_printk(TPACPI_DBG_BRGHT,
5999 "selected brightness_mode=%d\n",
6000 brightness_mode);
6001 }
6002
6003 /* Safety */
6004 if (thinkpad_id.vendor != PCI_VENDOR_ID_IBM &&
6005 (brightness_mode == TPACPI_BRGHT_MODE_ECNVRAM ||
6006 brightness_mode == TPACPI_BRGHT_MODE_EC))
6007 return -EINVAL;
6008
6009 if (tpacpi_brightness_get_raw(&b) < 0)
6010 return 1;
6011
6012 if (tp_features.bright_16levels)
6013 printk(TPACPI_INFO
6014 "detected a 16-level brightness capable ThinkPad\n");
6015
6016 ibm_backlight_device = backlight_device_register(
6017 TPACPI_BACKLIGHT_DEV_NAME, NULL, NULL,
6018 &ibm_backlight_data);
6019 if (IS_ERR(ibm_backlight_device)) {
6020 printk(TPACPI_ERR "Could not register backlight device\n");
6021 return PTR_ERR(ibm_backlight_device);
6022 }
6023 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT,
6024 "brightness is supported\n");
6025
6026 ibm_backlight_device->props.max_brightness =
6027 (tp_features.bright_16levels)? 15 : 7;
6028 ibm_backlight_device->props.brightness = b & TP_EC_BACKLIGHT_LVLMSK;
6029 backlight_update_status(ibm_backlight_device);
6030
6031 return 0;
6032 }
6033
6034 static void brightness_suspend(pm_message_t state)
6035 {
6036 tpacpi_brightness_checkpoint_nvram();
6037 }
6038
6039 static void brightness_shutdown(void)
6040 {
6041 tpacpi_brightness_checkpoint_nvram();
6042 }
6043
6044 static void brightness_exit(void)
6045 {
6046 if (ibm_backlight_device) {
6047 vdbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_BRGHT,
6048 "calling backlight_device_unregister()\n");
6049 backlight_device_unregister(ibm_backlight_device);
6050 }
6051
6052 tpacpi_brightness_checkpoint_nvram();
6053 }
6054
6055 static int brightness_read(char *p)
6056 {
6057 int len = 0;
6058 int level;
6059
6060 level = brightness_get(NULL);
6061 if (level < 0) {
6062 len += sprintf(p + len, "level:\t\tunreadable\n");
6063 } else {
6064 len += sprintf(p + len, "level:\t\t%d\n", level);
6065 len += sprintf(p + len, "commands:\tup, down\n");
6066 len += sprintf(p + len, "commands:\tlevel <level>"
6067 " (<level> is 0-%d)\n",
6068 (tp_features.bright_16levels) ? 15 : 7);
6069 }
6070
6071 return len;
6072 }
6073
6074 static int brightness_write(char *buf)
6075 {
6076 int level;
6077 int rc;
6078 char *cmd;
6079 int max_level = (tp_features.bright_16levels) ? 15 : 7;
6080
6081 level = brightness_get(NULL);
6082 if (level < 0)
6083 return level;
6084
6085 while ((cmd = next_cmd(&buf))) {
6086 if (strlencmp(cmd, "up") == 0) {
6087 if (level < max_level)
6088 level++;
6089 } else if (strlencmp(cmd, "down") == 0) {
6090 if (level > 0)
6091 level--;
6092 } else if (sscanf(cmd, "level %d", &level) == 1 &&
6093 level >= 0 && level <= max_level) {
6094 /* new level set */
6095 } else
6096 return -EINVAL;
6097 }
6098
6099 tpacpi_disclose_usertask("procfs brightness",
6100 "set level to %d\n", level);
6101
6102 /*
6103 * Now we know what the final level should be, so we try to set it.
6104 * Doing it this way makes the syscall restartable in case of EINTR
6105 */
6106 rc = brightness_set(level);
6107 return (rc == -EINTR)? ERESTARTSYS : rc;
6108 }
6109
6110 static struct ibm_struct brightness_driver_data = {
6111 .name = "brightness",
6112 .read = brightness_read,
6113 .write = brightness_write,
6114 .exit = brightness_exit,
6115 .suspend = brightness_suspend,
6116 .shutdown = brightness_shutdown,
6117 };
6118
6119 /*************************************************************************
6120 * Volume subdriver
6121 */
6122
6123 static int volume_offset = 0x30;
6124
6125 static int volume_read(char *p)
6126 {
6127 int len = 0;
6128 u8 level;
6129
6130 if (!acpi_ec_read(volume_offset, &level)) {
6131 len += sprintf(p + len, "level:\t\tunreadable\n");
6132 } else {
6133 len += sprintf(p + len, "level:\t\t%d\n", level & 0xf);
6134 len += sprintf(p + len, "mute:\t\t%s\n", onoff(level, 6));
6135 len += sprintf(p + len, "commands:\tup, down, mute\n");
6136 len += sprintf(p + len, "commands:\tlevel <level>"
6137 " (<level> is 0-15)\n");
6138 }
6139
6140 return len;
6141 }
6142
6143 static int volume_write(char *buf)
6144 {
6145 int cmos_cmd, inc, i;
6146 u8 level, mute;
6147 int new_level, new_mute;
6148 char *cmd;
6149
6150 while ((cmd = next_cmd(&buf))) {
6151 if (!acpi_ec_read(volume_offset, &level))
6152 return -EIO;
6153 new_mute = mute = level & 0x40;
6154 new_level = level = level & 0xf;
6155
6156 if (strlencmp(cmd, "up") == 0) {
6157 if (mute)
6158 new_mute = 0;
6159 else
6160 new_level = level == 15 ? 15 : level + 1;
6161 } else if (strlencmp(cmd, "down") == 0) {
6162 if (mute)
6163 new_mute = 0;
6164 else
6165 new_level = level == 0 ? 0 : level - 1;
6166 } else if (sscanf(cmd, "level %d", &new_level) == 1 &&
6167 new_level >= 0 && new_level <= 15) {
6168 /* new_level set */
6169 } else if (strlencmp(cmd, "mute") == 0) {
6170 new_mute = 0x40;
6171 } else
6172 return -EINVAL;
6173
6174 if (new_level != level) {
6175 /* mute doesn't change */
6176
6177 cmos_cmd = (new_level > level) ?
6178 TP_CMOS_VOLUME_UP : TP_CMOS_VOLUME_DOWN;
6179 inc = new_level > level ? 1 : -1;
6180
6181 if (mute && (issue_thinkpad_cmos_command(cmos_cmd) ||
6182 !acpi_ec_write(volume_offset, level)))
6183 return -EIO;
6184
6185 for (i = level; i != new_level; i += inc)
6186 if (issue_thinkpad_cmos_command(cmos_cmd) ||
6187 !acpi_ec_write(volume_offset, i + inc))
6188 return -EIO;
6189
6190 if (mute &&
6191 (issue_thinkpad_cmos_command(TP_CMOS_VOLUME_MUTE) ||
6192 !acpi_ec_write(volume_offset, new_level + mute))) {
6193 return -EIO;
6194 }
6195 }
6196
6197 if (new_mute != mute) {
6198 /* level doesn't change */
6199
6200 cmos_cmd = (new_mute) ?
6201 TP_CMOS_VOLUME_MUTE : TP_CMOS_VOLUME_UP;
6202
6203 if (issue_thinkpad_cmos_command(cmos_cmd) ||
6204 !acpi_ec_write(volume_offset, level + new_mute))
6205 return -EIO;
6206 }
6207 }
6208
6209 return 0;
6210 }
6211
6212 static struct ibm_struct volume_driver_data = {
6213 .name = "volume",
6214 .read = volume_read,
6215 .write = volume_write,
6216 };
6217
6218 /*************************************************************************
6219 * Fan subdriver
6220 */
6221
6222 /*
6223 * FAN ACCESS MODES
6224 *
6225 * TPACPI_FAN_RD_ACPI_GFAN:
6226 * ACPI GFAN method: returns fan level
6227 *
6228 * see TPACPI_FAN_WR_ACPI_SFAN
6229 * EC 0x2f (HFSP) not available if GFAN exists
6230 *
6231 * TPACPI_FAN_WR_ACPI_SFAN:
6232 * ACPI SFAN method: sets fan level, 0 (stop) to 7 (max)
6233 *
6234 * EC 0x2f (HFSP) might be available *for reading*, but do not use
6235 * it for writing.
6236 *
6237 * TPACPI_FAN_WR_TPEC:
6238 * ThinkPad EC register 0x2f (HFSP): fan control loop mode
6239 * Supported on almost all ThinkPads
6240 *
6241 * Fan speed changes of any sort (including those caused by the
6242 * disengaged mode) are usually done slowly by the firmware as the
6243 * maximum ammount of fan duty cycle change per second seems to be
6244 * limited.
6245 *
6246 * Reading is not available if GFAN exists.
6247 * Writing is not available if SFAN exists.
6248 *
6249 * Bits
6250 * 7 automatic mode engaged;
6251 * (default operation mode of the ThinkPad)
6252 * fan level is ignored in this mode.
6253 * 6 full speed mode (takes precedence over bit 7);
6254 * not available on all thinkpads. May disable
6255 * the tachometer while the fan controller ramps up
6256 * the speed (which can take up to a few *minutes*).
6257 * Speeds up fan to 100% duty-cycle, which is far above
6258 * the standard RPM levels. It is not impossible that
6259 * it could cause hardware damage.
6260 * 5-3 unused in some models. Extra bits for fan level
6261 * in others, but still useless as all values above
6262 * 7 map to the same speed as level 7 in these models.
6263 * 2-0 fan level (0..7 usually)
6264 * 0x00 = stop
6265 * 0x07 = max (set when temperatures critical)
6266 * Some ThinkPads may have other levels, see
6267 * TPACPI_FAN_WR_ACPI_FANS (X31/X40/X41)
6268 *
6269 * FIRMWARE BUG: on some models, EC 0x2f might not be initialized at
6270 * boot. Apparently the EC does not intialize it, so unless ACPI DSDT
6271 * does so, its initial value is meaningless (0x07).
6272 *
6273 * For firmware bugs, refer to:
6274 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
6275 *
6276 * ----
6277 *
6278 * ThinkPad EC register 0x84 (LSB), 0x85 (MSB):
6279 * Main fan tachometer reading (in RPM)
6280 *
6281 * This register is present on all ThinkPads with a new-style EC, and
6282 * it is known not to be present on the A21m/e, and T22, as there is
6283 * something else in offset 0x84 according to the ACPI DSDT. Other
6284 * ThinkPads from this same time period (and earlier) probably lack the
6285 * tachometer as well.
6286 *
6287 * Unfortunately a lot of ThinkPads with new-style ECs but whose firmware
6288 * was never fixed by IBM to report the EC firmware version string
6289 * probably support the tachometer (like the early X models), so
6290 * detecting it is quite hard. We need more data to know for sure.
6291 *
6292 * FIRMWARE BUG: always read 0x84 first, otherwise incorrect readings
6293 * might result.
6294 *
6295 * FIRMWARE BUG: may go stale while the EC is switching to full speed
6296 * mode.
6297 *
6298 * For firmware bugs, refer to:
6299 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
6300 *
6301 * TPACPI_FAN_WR_ACPI_FANS:
6302 * ThinkPad X31, X40, X41. Not available in the X60.
6303 *
6304 * FANS ACPI handle: takes three arguments: low speed, medium speed,
6305 * high speed. ACPI DSDT seems to map these three speeds to levels
6306 * as follows: STOP LOW LOW MED MED HIGH HIGH HIGH HIGH
6307 * (this map is stored on FAN0..FAN8 as "0,1,1,2,2,3,3,3,3")
6308 *
6309 * The speeds are stored on handles
6310 * (FANA:FAN9), (FANC:FANB), (FANE:FAND).
6311 *
6312 * There are three default speed sets, acessible as handles:
6313 * FS1L,FS1M,FS1H; FS2L,FS2M,FS2H; FS3L,FS3M,FS3H
6314 *
6315 * ACPI DSDT switches which set is in use depending on various
6316 * factors.
6317 *
6318 * TPACPI_FAN_WR_TPEC is also available and should be used to
6319 * command the fan. The X31/X40/X41 seems to have 8 fan levels,
6320 * but the ACPI tables just mention level 7.
6321 */
6322
6323 enum { /* Fan control constants */
6324 fan_status_offset = 0x2f, /* EC register 0x2f */
6325 fan_rpm_offset = 0x84, /* EC register 0x84: LSB, 0x85 MSB (RPM)
6326 * 0x84 must be read before 0x85 */
6327
6328 TP_EC_FAN_FULLSPEED = 0x40, /* EC fan mode: full speed */
6329 TP_EC_FAN_AUTO = 0x80, /* EC fan mode: auto fan control */
6330
6331 TPACPI_FAN_LAST_LEVEL = 0x100, /* Use cached last-seen fan level */
6332 };
6333
6334 enum fan_status_access_mode {
6335 TPACPI_FAN_NONE = 0, /* No fan status or control */
6336 TPACPI_FAN_RD_ACPI_GFAN, /* Use ACPI GFAN */
6337 TPACPI_FAN_RD_TPEC, /* Use ACPI EC regs 0x2f, 0x84-0x85 */
6338 };
6339
6340 enum fan_control_access_mode {
6341 TPACPI_FAN_WR_NONE = 0, /* No fan control */
6342 TPACPI_FAN_WR_ACPI_SFAN, /* Use ACPI SFAN */
6343 TPACPI_FAN_WR_TPEC, /* Use ACPI EC reg 0x2f */
6344 TPACPI_FAN_WR_ACPI_FANS, /* Use ACPI FANS and EC reg 0x2f */
6345 };
6346
6347 enum fan_control_commands {
6348 TPACPI_FAN_CMD_SPEED = 0x0001, /* speed command */
6349 TPACPI_FAN_CMD_LEVEL = 0x0002, /* level command */
6350 TPACPI_FAN_CMD_ENABLE = 0x0004, /* enable/disable cmd,
6351 * and also watchdog cmd */
6352 };
6353
6354 static int fan_control_allowed;
6355
6356 static enum fan_status_access_mode fan_status_access_mode;
6357 static enum fan_control_access_mode fan_control_access_mode;
6358 static enum fan_control_commands fan_control_commands;
6359
6360 static u8 fan_control_initial_status;
6361 static u8 fan_control_desired_level;
6362 static u8 fan_control_resume_level;
6363 static int fan_watchdog_maxinterval;
6364
6365 static struct mutex fan_mutex;
6366
6367 static void fan_watchdog_fire(struct work_struct *ignored);
6368 static DECLARE_DELAYED_WORK(fan_watchdog_task, fan_watchdog_fire);
6369
6370 TPACPI_HANDLE(fans, ec, "FANS"); /* X31, X40, X41 */
6371 TPACPI_HANDLE(gfan, ec, "GFAN", /* 570 */
6372 "\\FSPD", /* 600e/x, 770e, 770x */
6373 ); /* all others */
6374 TPACPI_HANDLE(sfan, ec, "SFAN", /* 570 */
6375 "JFNS", /* 770x-JL */
6376 ); /* all others */
6377
6378 /*
6379 * Unitialized HFSP quirk: ACPI DSDT and EC fail to initialize the
6380 * HFSP register at boot, so it contains 0x07 but the Thinkpad could
6381 * be in auto mode (0x80).
6382 *
6383 * This is corrected by any write to HFSP either by the driver, or
6384 * by the firmware.
6385 *
6386 * We assume 0x07 really means auto mode while this quirk is active,
6387 * as this is far more likely than the ThinkPad being in level 7,
6388 * which is only used by the firmware during thermal emergencies.
6389 *
6390 * Enable for TP-1Y (T43), TP-78 (R51e), TP-76 (R52),
6391 * TP-70 (T43, R52), which are known to be buggy.
6392 */
6393
6394 static void fan_quirk1_setup(void)
6395 {
6396 if (fan_control_initial_status == 0x07) {
6397 printk(TPACPI_NOTICE
6398 "fan_init: initial fan status is unknown, "
6399 "assuming it is in auto mode\n");
6400 tp_features.fan_ctrl_status_undef = 1;
6401 }
6402 }
6403
6404 static void fan_quirk1_handle(u8 *fan_status)
6405 {
6406 if (unlikely(tp_features.fan_ctrl_status_undef)) {
6407 if (*fan_status != fan_control_initial_status) {
6408 /* something changed the HFSP regisnter since
6409 * driver init time, so it is not undefined
6410 * anymore */
6411 tp_features.fan_ctrl_status_undef = 0;
6412 } else {
6413 /* Return most likely status. In fact, it
6414 * might be the only possible status */
6415 *fan_status = TP_EC_FAN_AUTO;
6416 }
6417 }
6418 }
6419
6420 /*
6421 * Call with fan_mutex held
6422 */
6423 static void fan_update_desired_level(u8 status)
6424 {
6425 if ((status &
6426 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
6427 if (status > 7)
6428 fan_control_desired_level = 7;
6429 else
6430 fan_control_desired_level = status;
6431 }
6432 }
6433
6434 static int fan_get_status(u8 *status)
6435 {
6436 u8 s;
6437
6438 /* TODO:
6439 * Add TPACPI_FAN_RD_ACPI_FANS ? */
6440
6441 switch (fan_status_access_mode) {
6442 case TPACPI_FAN_RD_ACPI_GFAN:
6443 /* 570, 600e/x, 770e, 770x */
6444
6445 if (unlikely(!acpi_evalf(gfan_handle, &s, NULL, "d")))
6446 return -EIO;
6447
6448 if (likely(status))
6449 *status = s & 0x07;
6450
6451 break;
6452
6453 case TPACPI_FAN_RD_TPEC:
6454 /* all except 570, 600e/x, 770e, 770x */
6455 if (unlikely(!acpi_ec_read(fan_status_offset, &s)))
6456 return -EIO;
6457
6458 if (likely(status)) {
6459 *status = s;
6460 fan_quirk1_handle(status);
6461 }
6462
6463 break;
6464
6465 default:
6466 return -ENXIO;
6467 }
6468
6469 return 0;
6470 }
6471
6472 static int fan_get_status_safe(u8 *status)
6473 {
6474 int rc;
6475 u8 s;
6476
6477 if (mutex_lock_killable(&fan_mutex))
6478 return -ERESTARTSYS;
6479 rc = fan_get_status(&s);
6480 if (!rc)
6481 fan_update_desired_level(s);
6482 mutex_unlock(&fan_mutex);
6483
6484 if (status)
6485 *status = s;
6486
6487 return rc;
6488 }
6489
6490 static int fan_get_speed(unsigned int *speed)
6491 {
6492 u8 hi, lo;
6493
6494 switch (fan_status_access_mode) {
6495 case TPACPI_FAN_RD_TPEC:
6496 /* all except 570, 600e/x, 770e, 770x */
6497 if (unlikely(!acpi_ec_read(fan_rpm_offset, &lo) ||
6498 !acpi_ec_read(fan_rpm_offset + 1, &hi)))
6499 return -EIO;
6500
6501 if (likely(speed))
6502 *speed = (hi << 8) | lo;
6503
6504 break;
6505
6506 default:
6507 return -ENXIO;
6508 }
6509
6510 return 0;
6511 }
6512
6513 static int fan_set_level(int level)
6514 {
6515 if (!fan_control_allowed)
6516 return -EPERM;
6517
6518 switch (fan_control_access_mode) {
6519 case TPACPI_FAN_WR_ACPI_SFAN:
6520 if (level >= 0 && level <= 7) {
6521 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", level))
6522 return -EIO;
6523 } else
6524 return -EINVAL;
6525 break;
6526
6527 case TPACPI_FAN_WR_ACPI_FANS:
6528 case TPACPI_FAN_WR_TPEC:
6529 if (!(level & TP_EC_FAN_AUTO) &&
6530 !(level & TP_EC_FAN_FULLSPEED) &&
6531 ((level < 0) || (level > 7)))
6532 return -EINVAL;
6533
6534 /* safety net should the EC not support AUTO
6535 * or FULLSPEED mode bits and just ignore them */
6536 if (level & TP_EC_FAN_FULLSPEED)
6537 level |= 7; /* safety min speed 7 */
6538 else if (level & TP_EC_FAN_AUTO)
6539 level |= 4; /* safety min speed 4 */
6540
6541 if (!acpi_ec_write(fan_status_offset, level))
6542 return -EIO;
6543 else
6544 tp_features.fan_ctrl_status_undef = 0;
6545 break;
6546
6547 default:
6548 return -ENXIO;
6549 }
6550
6551 vdbg_printk(TPACPI_DBG_FAN,
6552 "fan control: set fan control register to 0x%02x\n", level);
6553 return 0;
6554 }
6555
6556 static int fan_set_level_safe(int level)
6557 {
6558 int rc;
6559
6560 if (!fan_control_allowed)
6561 return -EPERM;
6562
6563 if (mutex_lock_killable(&fan_mutex))
6564 return -ERESTARTSYS;
6565
6566 if (level == TPACPI_FAN_LAST_LEVEL)
6567 level = fan_control_desired_level;
6568
6569 rc = fan_set_level(level);
6570 if (!rc)
6571 fan_update_desired_level(level);
6572
6573 mutex_unlock(&fan_mutex);
6574 return rc;
6575 }
6576
6577 static int fan_set_enable(void)
6578 {
6579 u8 s;
6580 int rc;
6581
6582 if (!fan_control_allowed)
6583 return -EPERM;
6584
6585 if (mutex_lock_killable(&fan_mutex))
6586 return -ERESTARTSYS;
6587
6588 switch (fan_control_access_mode) {
6589 case TPACPI_FAN_WR_ACPI_FANS:
6590 case TPACPI_FAN_WR_TPEC:
6591 rc = fan_get_status(&s);
6592 if (rc < 0)
6593 break;
6594
6595 /* Don't go out of emergency fan mode */
6596 if (s != 7) {
6597 s &= 0x07;
6598 s |= TP_EC_FAN_AUTO | 4; /* min fan speed 4 */
6599 }
6600
6601 if (!acpi_ec_write(fan_status_offset, s))
6602 rc = -EIO;
6603 else {
6604 tp_features.fan_ctrl_status_undef = 0;
6605 rc = 0;
6606 }
6607 break;
6608
6609 case TPACPI_FAN_WR_ACPI_SFAN:
6610 rc = fan_get_status(&s);
6611 if (rc < 0)
6612 break;
6613
6614 s &= 0x07;
6615
6616 /* Set fan to at least level 4 */
6617 s |= 4;
6618
6619 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", s))
6620 rc = -EIO;
6621 else
6622 rc = 0;
6623 break;
6624
6625 default:
6626 rc = -ENXIO;
6627 }
6628
6629 mutex_unlock(&fan_mutex);
6630
6631 if (!rc)
6632 vdbg_printk(TPACPI_DBG_FAN,
6633 "fan control: set fan control register to 0x%02x\n",
6634 s);
6635 return rc;
6636 }
6637
6638 static int fan_set_disable(void)
6639 {
6640 int rc;
6641
6642 if (!fan_control_allowed)
6643 return -EPERM;
6644
6645 if (mutex_lock_killable(&fan_mutex))
6646 return -ERESTARTSYS;
6647
6648 rc = 0;
6649 switch (fan_control_access_mode) {
6650 case TPACPI_FAN_WR_ACPI_FANS:
6651 case TPACPI_FAN_WR_TPEC:
6652 if (!acpi_ec_write(fan_status_offset, 0x00))
6653 rc = -EIO;
6654 else {
6655 fan_control_desired_level = 0;
6656 tp_features.fan_ctrl_status_undef = 0;
6657 }
6658 break;
6659
6660 case TPACPI_FAN_WR_ACPI_SFAN:
6661 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", 0x00))
6662 rc = -EIO;
6663 else
6664 fan_control_desired_level = 0;
6665 break;
6666
6667 default:
6668 rc = -ENXIO;
6669 }
6670
6671 if (!rc)
6672 vdbg_printk(TPACPI_DBG_FAN,
6673 "fan control: set fan control register to 0\n");
6674
6675 mutex_unlock(&fan_mutex);
6676 return rc;
6677 }
6678
6679 static int fan_set_speed(int speed)
6680 {
6681 int rc;
6682
6683 if (!fan_control_allowed)
6684 return -EPERM;
6685
6686 if (mutex_lock_killable(&fan_mutex))
6687 return -ERESTARTSYS;
6688
6689 rc = 0;
6690 switch (fan_control_access_mode) {
6691 case TPACPI_FAN_WR_ACPI_FANS:
6692 if (speed >= 0 && speed <= 65535) {
6693 if (!acpi_evalf(fans_handle, NULL, NULL, "vddd",
6694 speed, speed, speed))
6695 rc = -EIO;
6696 } else
6697 rc = -EINVAL;
6698 break;
6699
6700 default:
6701 rc = -ENXIO;
6702 }
6703
6704 mutex_unlock(&fan_mutex);
6705 return rc;
6706 }
6707
6708 static void fan_watchdog_reset(void)
6709 {
6710 static int fan_watchdog_active;
6711
6712 if (fan_control_access_mode == TPACPI_FAN_WR_NONE)
6713 return;
6714
6715 if (fan_watchdog_active)
6716 cancel_delayed_work(&fan_watchdog_task);
6717
6718 if (fan_watchdog_maxinterval > 0 &&
6719 tpacpi_lifecycle != TPACPI_LIFE_EXITING) {
6720 fan_watchdog_active = 1;
6721 if (!queue_delayed_work(tpacpi_wq, &fan_watchdog_task,
6722 msecs_to_jiffies(fan_watchdog_maxinterval
6723 * 1000))) {
6724 printk(TPACPI_ERR
6725 "failed to queue the fan watchdog, "
6726 "watchdog will not trigger\n");
6727 }
6728 } else
6729 fan_watchdog_active = 0;
6730 }
6731
6732 static void fan_watchdog_fire(struct work_struct *ignored)
6733 {
6734 int rc;
6735
6736 if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
6737 return;
6738
6739 printk(TPACPI_NOTICE "fan watchdog: enabling fan\n");
6740 rc = fan_set_enable();
6741 if (rc < 0) {
6742 printk(TPACPI_ERR "fan watchdog: error %d while enabling fan, "
6743 "will try again later...\n", -rc);
6744 /* reschedule for later */
6745 fan_watchdog_reset();
6746 }
6747 }
6748
6749 /*
6750 * SYSFS fan layout: hwmon compatible (device)
6751 *
6752 * pwm*_enable:
6753 * 0: "disengaged" mode
6754 * 1: manual mode
6755 * 2: native EC "auto" mode (recommended, hardware default)
6756 *
6757 * pwm*: set speed in manual mode, ignored otherwise.
6758 * 0 is level 0; 255 is level 7. Intermediate points done with linear
6759 * interpolation.
6760 *
6761 * fan*_input: tachometer reading, RPM
6762 *
6763 *
6764 * SYSFS fan layout: extensions
6765 *
6766 * fan_watchdog (driver):
6767 * fan watchdog interval in seconds, 0 disables (default), max 120
6768 */
6769
6770 /* sysfs fan pwm1_enable ----------------------------------------------- */
6771 static ssize_t fan_pwm1_enable_show(struct device *dev,
6772 struct device_attribute *attr,
6773 char *buf)
6774 {
6775 int res, mode;
6776 u8 status;
6777
6778 res = fan_get_status_safe(&status);
6779 if (res)
6780 return res;
6781
6782 if (status & TP_EC_FAN_FULLSPEED) {
6783 mode = 0;
6784 } else if (status & TP_EC_FAN_AUTO) {
6785 mode = 2;
6786 } else
6787 mode = 1;
6788
6789 return snprintf(buf, PAGE_SIZE, "%d\n", mode);
6790 }
6791
6792 static ssize_t fan_pwm1_enable_store(struct device *dev,
6793 struct device_attribute *attr,
6794 const char *buf, size_t count)
6795 {
6796 unsigned long t;
6797 int res, level;
6798
6799 if (parse_strtoul(buf, 2, &t))
6800 return -EINVAL;
6801
6802 tpacpi_disclose_usertask("hwmon pwm1_enable",
6803 "set fan mode to %lu\n", t);
6804
6805 switch (t) {
6806 case 0:
6807 level = TP_EC_FAN_FULLSPEED;
6808 break;
6809 case 1:
6810 level = TPACPI_FAN_LAST_LEVEL;
6811 break;
6812 case 2:
6813 level = TP_EC_FAN_AUTO;
6814 break;
6815 case 3:
6816 /* reserved for software-controlled auto mode */
6817 return -ENOSYS;
6818 default:
6819 return -EINVAL;
6820 }
6821
6822 res = fan_set_level_safe(level);
6823 if (res == -ENXIO)
6824 return -EINVAL;
6825 else if (res < 0)
6826 return res;
6827
6828 fan_watchdog_reset();
6829
6830 return count;
6831 }
6832
6833 static struct device_attribute dev_attr_fan_pwm1_enable =
6834 __ATTR(pwm1_enable, S_IWUSR | S_IRUGO,
6835 fan_pwm1_enable_show, fan_pwm1_enable_store);
6836
6837 /* sysfs fan pwm1 ------------------------------------------------------ */
6838 static ssize_t fan_pwm1_show(struct device *dev,
6839 struct device_attribute *attr,
6840 char *buf)
6841 {
6842 int res;
6843 u8 status;
6844
6845 res = fan_get_status_safe(&status);
6846 if (res)
6847 return res;
6848
6849 if ((status &
6850 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) != 0)
6851 status = fan_control_desired_level;
6852
6853 if (status > 7)
6854 status = 7;
6855
6856 return snprintf(buf, PAGE_SIZE, "%u\n", (status * 255) / 7);
6857 }
6858
6859 static ssize_t fan_pwm1_store(struct device *dev,
6860 struct device_attribute *attr,
6861 const char *buf, size_t count)
6862 {
6863 unsigned long s;
6864 int rc;
6865 u8 status, newlevel;
6866
6867 if (parse_strtoul(buf, 255, &s))
6868 return -EINVAL;
6869
6870 tpacpi_disclose_usertask("hwmon pwm1",
6871 "set fan speed to %lu\n", s);
6872
6873 /* scale down from 0-255 to 0-7 */
6874 newlevel = (s >> 5) & 0x07;
6875
6876 if (mutex_lock_killable(&fan_mutex))
6877 return -ERESTARTSYS;
6878
6879 rc = fan_get_status(&status);
6880 if (!rc && (status &
6881 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
6882 rc = fan_set_level(newlevel);
6883 if (rc == -ENXIO)
6884 rc = -EINVAL;
6885 else if (!rc) {
6886 fan_update_desired_level(newlevel);
6887 fan_watchdog_reset();
6888 }
6889 }
6890
6891 mutex_unlock(&fan_mutex);
6892 return (rc)? rc : count;
6893 }
6894
6895 static struct device_attribute dev_attr_fan_pwm1 =
6896 __ATTR(pwm1, S_IWUSR | S_IRUGO,
6897 fan_pwm1_show, fan_pwm1_store);
6898
6899 /* sysfs fan fan1_input ------------------------------------------------ */
6900 static ssize_t fan_fan1_input_show(struct device *dev,
6901 struct device_attribute *attr,
6902 char *buf)
6903 {
6904 int res;
6905 unsigned int speed;
6906
6907 res = fan_get_speed(&speed);
6908 if (res < 0)
6909 return res;
6910
6911 return snprintf(buf, PAGE_SIZE, "%u\n", speed);
6912 }
6913
6914 static struct device_attribute dev_attr_fan_fan1_input =
6915 __ATTR(fan1_input, S_IRUGO,
6916 fan_fan1_input_show, NULL);
6917
6918 /* sysfs fan fan_watchdog (hwmon driver) ------------------------------- */
6919 static ssize_t fan_fan_watchdog_show(struct device_driver *drv,
6920 char *buf)
6921 {
6922 return snprintf(buf, PAGE_SIZE, "%u\n", fan_watchdog_maxinterval);
6923 }
6924
6925 static ssize_t fan_fan_watchdog_store(struct device_driver *drv,
6926 const char *buf, size_t count)
6927 {
6928 unsigned long t;
6929
6930 if (parse_strtoul(buf, 120, &t))
6931 return -EINVAL;
6932
6933 if (!fan_control_allowed)
6934 return -EPERM;
6935
6936 fan_watchdog_maxinterval = t;
6937 fan_watchdog_reset();
6938
6939 tpacpi_disclose_usertask("fan_watchdog", "set to %lu\n", t);
6940
6941 return count;
6942 }
6943
6944 static DRIVER_ATTR(fan_watchdog, S_IWUSR | S_IRUGO,
6945 fan_fan_watchdog_show, fan_fan_watchdog_store);
6946
6947 /* --------------------------------------------------------------------- */
6948 static struct attribute *fan_attributes[] = {
6949 &dev_attr_fan_pwm1_enable.attr, &dev_attr_fan_pwm1.attr,
6950 &dev_attr_fan_fan1_input.attr,
6951 NULL
6952 };
6953
6954 static const struct attribute_group fan_attr_group = {
6955 .attrs = fan_attributes,
6956 };
6957
6958 #define TPACPI_FAN_Q1 0x0001
6959
6960 #define TPACPI_FAN_QI(__id1, __id2, __quirks) \
6961 { .vendor = PCI_VENDOR_ID_IBM, \
6962 .bios = TPACPI_MATCH_ANY, \
6963 .ec = TPID(__id1, __id2), \
6964 .quirks = __quirks }
6965
6966 static const struct tpacpi_quirk fan_quirk_table[] __initconst = {
6967 TPACPI_FAN_QI('1', 'Y', TPACPI_FAN_Q1),
6968 TPACPI_FAN_QI('7', '8', TPACPI_FAN_Q1),
6969 TPACPI_FAN_QI('7', '6', TPACPI_FAN_Q1),
6970 TPACPI_FAN_QI('7', '0', TPACPI_FAN_Q1),
6971 };
6972
6973 #undef TPACPI_FAN_QI
6974
6975 static int __init fan_init(struct ibm_init_struct *iibm)
6976 {
6977 int rc;
6978 unsigned long quirks;
6979
6980 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
6981 "initializing fan subdriver\n");
6982
6983 mutex_init(&fan_mutex);
6984 fan_status_access_mode = TPACPI_FAN_NONE;
6985 fan_control_access_mode = TPACPI_FAN_WR_NONE;
6986 fan_control_commands = 0;
6987 fan_watchdog_maxinterval = 0;
6988 tp_features.fan_ctrl_status_undef = 0;
6989 fan_control_desired_level = 7;
6990
6991 TPACPI_ACPIHANDLE_INIT(fans);
6992 TPACPI_ACPIHANDLE_INIT(gfan);
6993 TPACPI_ACPIHANDLE_INIT(sfan);
6994
6995 quirks = tpacpi_check_quirks(fan_quirk_table,
6996 ARRAY_SIZE(fan_quirk_table));
6997
6998 if (gfan_handle) {
6999 /* 570, 600e/x, 770e, 770x */
7000 fan_status_access_mode = TPACPI_FAN_RD_ACPI_GFAN;
7001 } else {
7002 /* all other ThinkPads: note that even old-style
7003 * ThinkPad ECs supports the fan control register */
7004 if (likely(acpi_ec_read(fan_status_offset,
7005 &fan_control_initial_status))) {
7006 fan_status_access_mode = TPACPI_FAN_RD_TPEC;
7007 if (quirks & TPACPI_FAN_Q1)
7008 fan_quirk1_setup();
7009 } else {
7010 printk(TPACPI_ERR
7011 "ThinkPad ACPI EC access misbehaving, "
7012 "fan status and control unavailable\n");
7013 return 1;
7014 }
7015 }
7016
7017 if (sfan_handle) {
7018 /* 570, 770x-JL */
7019 fan_control_access_mode = TPACPI_FAN_WR_ACPI_SFAN;
7020 fan_control_commands |=
7021 TPACPI_FAN_CMD_LEVEL | TPACPI_FAN_CMD_ENABLE;
7022 } else {
7023 if (!gfan_handle) {
7024 /* gfan without sfan means no fan control */
7025 /* all other models implement TP EC 0x2f control */
7026
7027 if (fans_handle) {
7028 /* X31, X40, X41 */
7029 fan_control_access_mode =
7030 TPACPI_FAN_WR_ACPI_FANS;
7031 fan_control_commands |=
7032 TPACPI_FAN_CMD_SPEED |
7033 TPACPI_FAN_CMD_LEVEL |
7034 TPACPI_FAN_CMD_ENABLE;
7035 } else {
7036 fan_control_access_mode = TPACPI_FAN_WR_TPEC;
7037 fan_control_commands |=
7038 TPACPI_FAN_CMD_LEVEL |
7039 TPACPI_FAN_CMD_ENABLE;
7040 }
7041 }
7042 }
7043
7044 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
7045 "fan is %s, modes %d, %d\n",
7046 str_supported(fan_status_access_mode != TPACPI_FAN_NONE ||
7047 fan_control_access_mode != TPACPI_FAN_WR_NONE),
7048 fan_status_access_mode, fan_control_access_mode);
7049
7050 /* fan control master switch */
7051 if (!fan_control_allowed) {
7052 fan_control_access_mode = TPACPI_FAN_WR_NONE;
7053 fan_control_commands = 0;
7054 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
7055 "fan control features disabled by parameter\n");
7056 }
7057
7058 /* update fan_control_desired_level */
7059 if (fan_status_access_mode != TPACPI_FAN_NONE)
7060 fan_get_status_safe(NULL);
7061
7062 if (fan_status_access_mode != TPACPI_FAN_NONE ||
7063 fan_control_access_mode != TPACPI_FAN_WR_NONE) {
7064 rc = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
7065 &fan_attr_group);
7066 if (rc < 0)
7067 return rc;
7068
7069 rc = driver_create_file(&tpacpi_hwmon_pdriver.driver,
7070 &driver_attr_fan_watchdog);
7071 if (rc < 0) {
7072 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
7073 &fan_attr_group);
7074 return rc;
7075 }
7076 return 0;
7077 } else
7078 return 1;
7079 }
7080
7081 static void fan_exit(void)
7082 {
7083 vdbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_FAN,
7084 "cancelling any pending fan watchdog tasks\n");
7085
7086 /* FIXME: can we really do this unconditionally? */
7087 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj, &fan_attr_group);
7088 driver_remove_file(&tpacpi_hwmon_pdriver.driver,
7089 &driver_attr_fan_watchdog);
7090
7091 cancel_delayed_work(&fan_watchdog_task);
7092 flush_workqueue(tpacpi_wq);
7093 }
7094
7095 static void fan_suspend(pm_message_t state)
7096 {
7097 int rc;
7098
7099 if (!fan_control_allowed)
7100 return;
7101
7102 /* Store fan status in cache */
7103 fan_control_resume_level = 0;
7104 rc = fan_get_status_safe(&fan_control_resume_level);
7105 if (rc < 0)
7106 printk(TPACPI_NOTICE
7107 "failed to read fan level for later "
7108 "restore during resume: %d\n", rc);
7109
7110 /* if it is undefined, don't attempt to restore it.
7111 * KEEP THIS LAST */
7112 if (tp_features.fan_ctrl_status_undef)
7113 fan_control_resume_level = 0;
7114 }
7115
7116 static void fan_resume(void)
7117 {
7118 u8 current_level = 7;
7119 bool do_set = false;
7120 int rc;
7121
7122 /* DSDT *always* updates status on resume */
7123 tp_features.fan_ctrl_status_undef = 0;
7124
7125 if (!fan_control_allowed ||
7126 !fan_control_resume_level ||
7127 (fan_get_status_safe(&current_level) < 0))
7128 return;
7129
7130 switch (fan_control_access_mode) {
7131 case TPACPI_FAN_WR_ACPI_SFAN:
7132 /* never decrease fan level */
7133 do_set = (fan_control_resume_level > current_level);
7134 break;
7135 case TPACPI_FAN_WR_ACPI_FANS:
7136 case TPACPI_FAN_WR_TPEC:
7137 /* never decrease fan level, scale is:
7138 * TP_EC_FAN_FULLSPEED > 7 >= TP_EC_FAN_AUTO
7139 *
7140 * We expect the firmware to set either 7 or AUTO, but we
7141 * handle FULLSPEED out of paranoia.
7142 *
7143 * So, we can safely only restore FULLSPEED or 7, anything
7144 * else could slow the fan. Restoring AUTO is useless, at
7145 * best that's exactly what the DSDT already set (it is the
7146 * slower it uses).
7147 *
7148 * Always keep in mind that the DSDT *will* have set the
7149 * fans to what the vendor supposes is the best level. We
7150 * muck with it only to speed the fan up.
7151 */
7152 if (fan_control_resume_level != 7 &&
7153 !(fan_control_resume_level & TP_EC_FAN_FULLSPEED))
7154 return;
7155 else
7156 do_set = !(current_level & TP_EC_FAN_FULLSPEED) &&
7157 (current_level != fan_control_resume_level);
7158 break;
7159 default:
7160 return;
7161 }
7162 if (do_set) {
7163 printk(TPACPI_NOTICE
7164 "restoring fan level to 0x%02x\n",
7165 fan_control_resume_level);
7166 rc = fan_set_level_safe(fan_control_resume_level);
7167 if (rc < 0)
7168 printk(TPACPI_NOTICE
7169 "failed to restore fan level: %d\n", rc);
7170 }
7171 }
7172
7173 static int fan_read(char *p)
7174 {
7175 int len = 0;
7176 int rc;
7177 u8 status;
7178 unsigned int speed = 0;
7179
7180 switch (fan_status_access_mode) {
7181 case TPACPI_FAN_RD_ACPI_GFAN:
7182 /* 570, 600e/x, 770e, 770x */
7183 rc = fan_get_status_safe(&status);
7184 if (rc < 0)
7185 return rc;
7186
7187 len += sprintf(p + len, "status:\t\t%s\n"
7188 "level:\t\t%d\n",
7189 (status != 0) ? "enabled" : "disabled", status);
7190 break;
7191
7192 case TPACPI_FAN_RD_TPEC:
7193 /* all except 570, 600e/x, 770e, 770x */
7194 rc = fan_get_status_safe(&status);
7195 if (rc < 0)
7196 return rc;
7197
7198 len += sprintf(p + len, "status:\t\t%s\n",
7199 (status != 0) ? "enabled" : "disabled");
7200
7201 rc = fan_get_speed(&speed);
7202 if (rc < 0)
7203 return rc;
7204
7205 len += sprintf(p + len, "speed:\t\t%d\n", speed);
7206
7207 if (status & TP_EC_FAN_FULLSPEED)
7208 /* Disengaged mode takes precedence */
7209 len += sprintf(p + len, "level:\t\tdisengaged\n");
7210 else if (status & TP_EC_FAN_AUTO)
7211 len += sprintf(p + len, "level:\t\tauto\n");
7212 else
7213 len += sprintf(p + len, "level:\t\t%d\n", status);
7214 break;
7215
7216 case TPACPI_FAN_NONE:
7217 default:
7218 len += sprintf(p + len, "status:\t\tnot supported\n");
7219 }
7220
7221 if (fan_control_commands & TPACPI_FAN_CMD_LEVEL) {
7222 len += sprintf(p + len, "commands:\tlevel <level>");
7223
7224 switch (fan_control_access_mode) {
7225 case TPACPI_FAN_WR_ACPI_SFAN:
7226 len += sprintf(p + len, " (<level> is 0-7)\n");
7227 break;
7228
7229 default:
7230 len += sprintf(p + len, " (<level> is 0-7, "
7231 "auto, disengaged, full-speed)\n");
7232 break;
7233 }
7234 }
7235
7236 if (fan_control_commands & TPACPI_FAN_CMD_ENABLE)
7237 len += sprintf(p + len, "commands:\tenable, disable\n"
7238 "commands:\twatchdog <timeout> (<timeout> "
7239 "is 0 (off), 1-120 (seconds))\n");
7240
7241 if (fan_control_commands & TPACPI_FAN_CMD_SPEED)
7242 len += sprintf(p + len, "commands:\tspeed <speed>"
7243 " (<speed> is 0-65535)\n");
7244
7245 return len;
7246 }
7247
7248 static int fan_write_cmd_level(const char *cmd, int *rc)
7249 {
7250 int level;
7251
7252 if (strlencmp(cmd, "level auto") == 0)
7253 level = TP_EC_FAN_AUTO;
7254 else if ((strlencmp(cmd, "level disengaged") == 0) |
7255 (strlencmp(cmd, "level full-speed") == 0))
7256 level = TP_EC_FAN_FULLSPEED;
7257 else if (sscanf(cmd, "level %d", &level) != 1)
7258 return 0;
7259
7260 *rc = fan_set_level_safe(level);
7261 if (*rc == -ENXIO)
7262 printk(TPACPI_ERR "level command accepted for unsupported "
7263 "access mode %d", fan_control_access_mode);
7264 else if (!*rc)
7265 tpacpi_disclose_usertask("procfs fan",
7266 "set level to %d\n", level);
7267
7268 return 1;
7269 }
7270
7271 static int fan_write_cmd_enable(const char *cmd, int *rc)
7272 {
7273 if (strlencmp(cmd, "enable") != 0)
7274 return 0;
7275
7276 *rc = fan_set_enable();
7277 if (*rc == -ENXIO)
7278 printk(TPACPI_ERR "enable command accepted for unsupported "
7279 "access mode %d", fan_control_access_mode);
7280 else if (!*rc)
7281 tpacpi_disclose_usertask("procfs fan", "enable\n");
7282
7283 return 1;
7284 }
7285
7286 static int fan_write_cmd_disable(const char *cmd, int *rc)
7287 {
7288 if (strlencmp(cmd, "disable") != 0)
7289 return 0;
7290
7291 *rc = fan_set_disable();
7292 if (*rc == -ENXIO)
7293 printk(TPACPI_ERR "disable command accepted for unsupported "
7294 "access mode %d", fan_control_access_mode);
7295 else if (!*rc)
7296 tpacpi_disclose_usertask("procfs fan", "disable\n");
7297
7298 return 1;
7299 }
7300
7301 static int fan_write_cmd_speed(const char *cmd, int *rc)
7302 {
7303 int speed;
7304
7305 /* TODO:
7306 * Support speed <low> <medium> <high> ? */
7307
7308 if (sscanf(cmd, "speed %d", &speed) != 1)
7309 return 0;
7310
7311 *rc = fan_set_speed(speed);
7312 if (*rc == -ENXIO)
7313 printk(TPACPI_ERR "speed command accepted for unsupported "
7314 "access mode %d", fan_control_access_mode);
7315 else if (!*rc)
7316 tpacpi_disclose_usertask("procfs fan",
7317 "set speed to %d\n", speed);
7318
7319 return 1;
7320 }
7321
7322 static int fan_write_cmd_watchdog(const char *cmd, int *rc)
7323 {
7324 int interval;
7325
7326 if (sscanf(cmd, "watchdog %d", &interval) != 1)
7327 return 0;
7328
7329 if (interval < 0 || interval > 120)
7330 *rc = -EINVAL;
7331 else {
7332 fan_watchdog_maxinterval = interval;
7333 tpacpi_disclose_usertask("procfs fan",
7334 "set watchdog timer to %d\n",
7335 interval);
7336 }
7337
7338 return 1;
7339 }
7340
7341 static int fan_write(char *buf)
7342 {
7343 char *cmd;
7344 int rc = 0;
7345
7346 while (!rc && (cmd = next_cmd(&buf))) {
7347 if (!((fan_control_commands & TPACPI_FAN_CMD_LEVEL) &&
7348 fan_write_cmd_level(cmd, &rc)) &&
7349 !((fan_control_commands & TPACPI_FAN_CMD_ENABLE) &&
7350 (fan_write_cmd_enable(cmd, &rc) ||
7351 fan_write_cmd_disable(cmd, &rc) ||
7352 fan_write_cmd_watchdog(cmd, &rc))) &&
7353 !((fan_control_commands & TPACPI_FAN_CMD_SPEED) &&
7354 fan_write_cmd_speed(cmd, &rc))
7355 )
7356 rc = -EINVAL;
7357 else if (!rc)
7358 fan_watchdog_reset();
7359 }
7360
7361 return rc;
7362 }
7363
7364 static struct ibm_struct fan_driver_data = {
7365 .name = "fan",
7366 .read = fan_read,
7367 .write = fan_write,
7368 .exit = fan_exit,
7369 .suspend = fan_suspend,
7370 .resume = fan_resume,
7371 };
7372
7373 /****************************************************************************
7374 ****************************************************************************
7375 *
7376 * Infrastructure
7377 *
7378 ****************************************************************************
7379 ****************************************************************************/
7380
7381 /* sysfs name ---------------------------------------------------------- */
7382 static ssize_t thinkpad_acpi_pdev_name_show(struct device *dev,
7383 struct device_attribute *attr,
7384 char *buf)
7385 {
7386 return snprintf(buf, PAGE_SIZE, "%s\n", TPACPI_NAME);
7387 }
7388
7389 static struct device_attribute dev_attr_thinkpad_acpi_pdev_name =
7390 __ATTR(name, S_IRUGO, thinkpad_acpi_pdev_name_show, NULL);
7391
7392 /* --------------------------------------------------------------------- */
7393
7394 /* /proc support */
7395 static struct proc_dir_entry *proc_dir;
7396
7397 /*
7398 * Module and infrastructure proble, init and exit handling
7399 */
7400
7401 static int force_load;
7402
7403 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
7404 static const char * __init str_supported(int is_supported)
7405 {
7406 static char text_unsupported[] __initdata = "not supported";
7407
7408 return (is_supported)? &text_unsupported[4] : &text_unsupported[0];
7409 }
7410 #endif /* CONFIG_THINKPAD_ACPI_DEBUG */
7411
7412 static void ibm_exit(struct ibm_struct *ibm)
7413 {
7414 dbg_printk(TPACPI_DBG_EXIT, "removing %s\n", ibm->name);
7415
7416 list_del_init(&ibm->all_drivers);
7417
7418 if (ibm->flags.acpi_notify_installed) {
7419 dbg_printk(TPACPI_DBG_EXIT,
7420 "%s: acpi_remove_notify_handler\n", ibm->name);
7421 BUG_ON(!ibm->acpi);
7422 acpi_remove_notify_handler(*ibm->acpi->handle,
7423 ibm->acpi->type,
7424 dispatch_acpi_notify);
7425 ibm->flags.acpi_notify_installed = 0;
7426 ibm->flags.acpi_notify_installed = 0;
7427 }
7428
7429 if (ibm->flags.proc_created) {
7430 dbg_printk(TPACPI_DBG_EXIT,
7431 "%s: remove_proc_entry\n", ibm->name);
7432 remove_proc_entry(ibm->name, proc_dir);
7433 ibm->flags.proc_created = 0;
7434 }
7435
7436 if (ibm->flags.acpi_driver_registered) {
7437 dbg_printk(TPACPI_DBG_EXIT,
7438 "%s: acpi_bus_unregister_driver\n", ibm->name);
7439 BUG_ON(!ibm->acpi);
7440 acpi_bus_unregister_driver(ibm->acpi->driver);
7441 kfree(ibm->acpi->driver);
7442 ibm->acpi->driver = NULL;
7443 ibm->flags.acpi_driver_registered = 0;
7444 }
7445
7446 if (ibm->flags.init_called && ibm->exit) {
7447 ibm->exit();
7448 ibm->flags.init_called = 0;
7449 }
7450
7451 dbg_printk(TPACPI_DBG_INIT, "finished removing %s\n", ibm->name);
7452 }
7453
7454 static int __init ibm_init(struct ibm_init_struct *iibm)
7455 {
7456 int ret;
7457 struct ibm_struct *ibm = iibm->data;
7458 struct proc_dir_entry *entry;
7459
7460 BUG_ON(ibm == NULL);
7461
7462 INIT_LIST_HEAD(&ibm->all_drivers);
7463
7464 if (ibm->flags.experimental && !experimental)
7465 return 0;
7466
7467 dbg_printk(TPACPI_DBG_INIT,
7468 "probing for %s\n", ibm->name);
7469
7470 if (iibm->init) {
7471 ret = iibm->init(iibm);
7472 if (ret > 0)
7473 return 0; /* probe failed */
7474 if (ret)
7475 return ret;
7476
7477 ibm->flags.init_called = 1;
7478 }
7479
7480 if (ibm->acpi) {
7481 if (ibm->acpi->hid) {
7482 ret = register_tpacpi_subdriver(ibm);
7483 if (ret)
7484 goto err_out;
7485 }
7486
7487 if (ibm->acpi->notify) {
7488 ret = setup_acpi_notify(ibm);
7489 if (ret == -ENODEV) {
7490 printk(TPACPI_NOTICE "disabling subdriver %s\n",
7491 ibm->name);
7492 ret = 0;
7493 goto err_out;
7494 }
7495 if (ret < 0)
7496 goto err_out;
7497 }
7498 }
7499
7500 dbg_printk(TPACPI_DBG_INIT,
7501 "%s installed\n", ibm->name);
7502
7503 if (ibm->read) {
7504 entry = create_proc_entry(ibm->name,
7505 S_IFREG | S_IRUGO | S_IWUSR,
7506 proc_dir);
7507 if (!entry) {
7508 printk(TPACPI_ERR "unable to create proc entry %s\n",
7509 ibm->name);
7510 ret = -ENODEV;
7511 goto err_out;
7512 }
7513 entry->data = ibm;
7514 entry->read_proc = &dispatch_procfs_read;
7515 if (ibm->write)
7516 entry->write_proc = &dispatch_procfs_write;
7517 ibm->flags.proc_created = 1;
7518 }
7519
7520 list_add_tail(&ibm->all_drivers, &tpacpi_all_drivers);
7521
7522 return 0;
7523
7524 err_out:
7525 dbg_printk(TPACPI_DBG_INIT,
7526 "%s: at error exit path with result %d\n",
7527 ibm->name, ret);
7528
7529 ibm_exit(ibm);
7530 return (ret < 0)? ret : 0;
7531 }
7532
7533 /* Probing */
7534
7535 static bool __pure __init tpacpi_is_fw_digit(const char c)
7536 {
7537 return (c >= '0' && c <= '9') || (c >= 'A' && c <= 'Z');
7538 }
7539
7540 /* Most models: xxyTkkWW (#.##c); Ancient 570/600 and -SL lacks (#.##c) */
7541 static bool __pure __init tpacpi_is_valid_fw_id(const char* const s,
7542 const char t)
7543 {
7544 return s && strlen(s) >= 8 &&
7545 tpacpi_is_fw_digit(s[0]) &&
7546 tpacpi_is_fw_digit(s[1]) &&
7547 s[2] == t && s[3] == 'T' &&
7548 tpacpi_is_fw_digit(s[4]) &&
7549 tpacpi_is_fw_digit(s[5]) &&
7550 s[6] == 'W' && s[7] == 'W';
7551 }
7552
7553 /* returns 0 - probe ok, or < 0 - probe error.
7554 * Probe ok doesn't mean thinkpad found.
7555 * On error, kfree() cleanup on tp->* is not performed, caller must do it */
7556 static int __must_check __init get_thinkpad_model_data(
7557 struct thinkpad_id_data *tp)
7558 {
7559 const struct dmi_device *dev = NULL;
7560 char ec_fw_string[18];
7561 char const *s;
7562
7563 if (!tp)
7564 return -EINVAL;
7565
7566 memset(tp, 0, sizeof(*tp));
7567
7568 if (dmi_name_in_vendors("IBM"))
7569 tp->vendor = PCI_VENDOR_ID_IBM;
7570 else if (dmi_name_in_vendors("LENOVO"))
7571 tp->vendor = PCI_VENDOR_ID_LENOVO;
7572 else
7573 return 0;
7574
7575 s = dmi_get_system_info(DMI_BIOS_VERSION);
7576 tp->bios_version_str = kstrdup(s, GFP_KERNEL);
7577 if (s && !tp->bios_version_str)
7578 return -ENOMEM;
7579
7580 /* Really ancient ThinkPad 240X will fail this, which is fine */
7581 if (!tpacpi_is_valid_fw_id(tp->bios_version_str, 'E'))
7582 return 0;
7583
7584 tp->bios_model = tp->bios_version_str[0]
7585 | (tp->bios_version_str[1] << 8);
7586 tp->bios_release = (tp->bios_version_str[4] << 8)
7587 | tp->bios_version_str[5];
7588
7589 /*
7590 * ThinkPad T23 or newer, A31 or newer, R50e or newer,
7591 * X32 or newer, all Z series; Some models must have an
7592 * up-to-date BIOS or they will not be detected.
7593 *
7594 * See http://thinkwiki.org/wiki/List_of_DMI_IDs
7595 */
7596 while ((dev = dmi_find_device(DMI_DEV_TYPE_OEM_STRING, NULL, dev))) {
7597 if (sscanf(dev->name,
7598 "IBM ThinkPad Embedded Controller -[%17c",
7599 ec_fw_string) == 1) {
7600 ec_fw_string[sizeof(ec_fw_string) - 1] = 0;
7601 ec_fw_string[strcspn(ec_fw_string, " ]")] = 0;
7602
7603 tp->ec_version_str = kstrdup(ec_fw_string, GFP_KERNEL);
7604 if (!tp->ec_version_str)
7605 return -ENOMEM;
7606
7607 if (tpacpi_is_valid_fw_id(ec_fw_string, 'H')) {
7608 tp->ec_model = ec_fw_string[0]
7609 | (ec_fw_string[1] << 8);
7610 tp->ec_release = (ec_fw_string[4] << 8)
7611 | ec_fw_string[5];
7612 } else {
7613 printk(TPACPI_NOTICE
7614 "ThinkPad firmware release %s "
7615 "doesn't match the known patterns\n",
7616 ec_fw_string);
7617 printk(TPACPI_NOTICE
7618 "please report this to %s\n",
7619 TPACPI_MAIL);
7620 }
7621 break;
7622 }
7623 }
7624
7625 s = dmi_get_system_info(DMI_PRODUCT_VERSION);
7626 if (s && !strnicmp(s, "ThinkPad", 8)) {
7627 tp->model_str = kstrdup(s, GFP_KERNEL);
7628 if (!tp->model_str)
7629 return -ENOMEM;
7630 }
7631
7632 s = dmi_get_system_info(DMI_PRODUCT_NAME);
7633 tp->nummodel_str = kstrdup(s, GFP_KERNEL);
7634 if (s && !tp->nummodel_str)
7635 return -ENOMEM;
7636
7637 return 0;
7638 }
7639
7640 static int __init probe_for_thinkpad(void)
7641 {
7642 int is_thinkpad;
7643
7644 if (acpi_disabled)
7645 return -ENODEV;
7646
7647 /*
7648 * Non-ancient models have better DMI tagging, but very old models
7649 * don't.
7650 */
7651 is_thinkpad = (thinkpad_id.model_str != NULL);
7652
7653 /* ec is required because many other handles are relative to it */
7654 TPACPI_ACPIHANDLE_INIT(ec);
7655 if (!ec_handle) {
7656 if (is_thinkpad)
7657 printk(TPACPI_ERR
7658 "Not yet supported ThinkPad detected!\n");
7659 return -ENODEV;
7660 }
7661
7662 /*
7663 * Risks a regression on very old machines, but reduces potential
7664 * false positives a damn great deal
7665 */
7666 if (!is_thinkpad)
7667 is_thinkpad = (thinkpad_id.vendor == PCI_VENDOR_ID_IBM);
7668
7669 if (!is_thinkpad && !force_load)
7670 return -ENODEV;
7671
7672 return 0;
7673 }
7674
7675
7676 /* Module init, exit, parameters */
7677
7678 static struct ibm_init_struct ibms_init[] __initdata = {
7679 {
7680 .init = thinkpad_acpi_driver_init,
7681 .data = &thinkpad_acpi_driver_data,
7682 },
7683 {
7684 .init = hotkey_init,
7685 .data = &hotkey_driver_data,
7686 },
7687 {
7688 .init = bluetooth_init,
7689 .data = &bluetooth_driver_data,
7690 },
7691 {
7692 .init = wan_init,
7693 .data = &wan_driver_data,
7694 },
7695 {
7696 .init = uwb_init,
7697 .data = &uwb_driver_data,
7698 },
7699 #ifdef CONFIG_THINKPAD_ACPI_VIDEO
7700 {
7701 .init = video_init,
7702 .data = &video_driver_data,
7703 },
7704 #endif
7705 {
7706 .init = light_init,
7707 .data = &light_driver_data,
7708 },
7709 #ifdef CONFIG_THINKPAD_ACPI_DOCK
7710 {
7711 .init = dock_init,
7712 .data = &dock_driver_data[0],
7713 },
7714 {
7715 .init = dock_init2,
7716 .data = &dock_driver_data[1],
7717 },
7718 #endif
7719 #ifdef CONFIG_THINKPAD_ACPI_BAY
7720 {
7721 .init = bay_init,
7722 .data = &bay_driver_data,
7723 },
7724 #endif
7725 {
7726 .init = cmos_init,
7727 .data = &cmos_driver_data,
7728 },
7729 {
7730 .init = led_init,
7731 .data = &led_driver_data,
7732 },
7733 {
7734 .init = beep_init,
7735 .data = &beep_driver_data,
7736 },
7737 {
7738 .init = thermal_init,
7739 .data = &thermal_driver_data,
7740 },
7741 {
7742 .data = &ecdump_driver_data,
7743 },
7744 {
7745 .init = brightness_init,
7746 .data = &brightness_driver_data,
7747 },
7748 {
7749 .data = &volume_driver_data,
7750 },
7751 {
7752 .init = fan_init,
7753 .data = &fan_driver_data,
7754 },
7755 };
7756
7757 static int __init set_ibm_param(const char *val, struct kernel_param *kp)
7758 {
7759 unsigned int i;
7760 struct ibm_struct *ibm;
7761
7762 if (!kp || !kp->name || !val)
7763 return -EINVAL;
7764
7765 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
7766 ibm = ibms_init[i].data;
7767 WARN_ON(ibm == NULL);
7768
7769 if (!ibm || !ibm->name)
7770 continue;
7771
7772 if (strcmp(ibm->name, kp->name) == 0 && ibm->write) {
7773 if (strlen(val) > sizeof(ibms_init[i].param) - 2)
7774 return -ENOSPC;
7775 strcpy(ibms_init[i].param, val);
7776 strcat(ibms_init[i].param, ",");
7777 return 0;
7778 }
7779 }
7780
7781 return -EINVAL;
7782 }
7783
7784 module_param(experimental, int, 0);
7785 MODULE_PARM_DESC(experimental,
7786 "Enables experimental features when non-zero");
7787
7788 module_param_named(debug, dbg_level, uint, 0);
7789 MODULE_PARM_DESC(debug, "Sets debug level bit-mask");
7790
7791 module_param(force_load, bool, 0);
7792 MODULE_PARM_DESC(force_load,
7793 "Attempts to load the driver even on a "
7794 "mis-identified ThinkPad when true");
7795
7796 module_param_named(fan_control, fan_control_allowed, bool, 0);
7797 MODULE_PARM_DESC(fan_control,
7798 "Enables setting fan parameters features when true");
7799
7800 module_param_named(brightness_mode, brightness_mode, uint, 0);
7801 MODULE_PARM_DESC(brightness_mode,
7802 "Selects brightness control strategy: "
7803 "0=auto, 1=EC, 2=UCMS, 3=EC+NVRAM");
7804
7805 module_param(brightness_enable, uint, 0);
7806 MODULE_PARM_DESC(brightness_enable,
7807 "Enables backlight control when 1, disables when 0");
7808
7809 module_param(hotkey_report_mode, uint, 0);
7810 MODULE_PARM_DESC(hotkey_report_mode,
7811 "used for backwards compatibility with userspace, "
7812 "see documentation");
7813
7814 #define TPACPI_PARAM(feature) \
7815 module_param_call(feature, set_ibm_param, NULL, NULL, 0); \
7816 MODULE_PARM_DESC(feature, "Simulates thinkpad-acpi procfs command " \
7817 "at module load, see documentation")
7818
7819 TPACPI_PARAM(hotkey);
7820 TPACPI_PARAM(bluetooth);
7821 TPACPI_PARAM(video);
7822 TPACPI_PARAM(light);
7823 #ifdef CONFIG_THINKPAD_ACPI_DOCK
7824 TPACPI_PARAM(dock);
7825 #endif
7826 #ifdef CONFIG_THINKPAD_ACPI_BAY
7827 TPACPI_PARAM(bay);
7828 #endif /* CONFIG_THINKPAD_ACPI_BAY */
7829 TPACPI_PARAM(cmos);
7830 TPACPI_PARAM(led);
7831 TPACPI_PARAM(beep);
7832 TPACPI_PARAM(ecdump);
7833 TPACPI_PARAM(brightness);
7834 TPACPI_PARAM(volume);
7835 TPACPI_PARAM(fan);
7836
7837 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
7838 module_param(dbg_wlswemul, uint, 0);
7839 MODULE_PARM_DESC(dbg_wlswemul, "Enables WLSW emulation");
7840 module_param_named(wlsw_state, tpacpi_wlsw_emulstate, bool, 0);
7841 MODULE_PARM_DESC(wlsw_state,
7842 "Initial state of the emulated WLSW switch");
7843
7844 module_param(dbg_bluetoothemul, uint, 0);
7845 MODULE_PARM_DESC(dbg_bluetoothemul, "Enables bluetooth switch emulation");
7846 module_param_named(bluetooth_state, tpacpi_bluetooth_emulstate, bool, 0);
7847 MODULE_PARM_DESC(bluetooth_state,
7848 "Initial state of the emulated bluetooth switch");
7849
7850 module_param(dbg_wwanemul, uint, 0);
7851 MODULE_PARM_DESC(dbg_wwanemul, "Enables WWAN switch emulation");
7852 module_param_named(wwan_state, tpacpi_wwan_emulstate, bool, 0);
7853 MODULE_PARM_DESC(wwan_state,
7854 "Initial state of the emulated WWAN switch");
7855
7856 module_param(dbg_uwbemul, uint, 0);
7857 MODULE_PARM_DESC(dbg_uwbemul, "Enables UWB switch emulation");
7858 module_param_named(uwb_state, tpacpi_uwb_emulstate, bool, 0);
7859 MODULE_PARM_DESC(uwb_state,
7860 "Initial state of the emulated UWB switch");
7861 #endif
7862
7863 static void thinkpad_acpi_module_exit(void)
7864 {
7865 struct ibm_struct *ibm, *itmp;
7866
7867 tpacpi_lifecycle = TPACPI_LIFE_EXITING;
7868
7869 list_for_each_entry_safe_reverse(ibm, itmp,
7870 &tpacpi_all_drivers,
7871 all_drivers) {
7872 ibm_exit(ibm);
7873 }
7874
7875 dbg_printk(TPACPI_DBG_INIT, "finished subdriver exit path...\n");
7876
7877 if (tpacpi_inputdev) {
7878 if (tp_features.input_device_registered)
7879 input_unregister_device(tpacpi_inputdev);
7880 else
7881 input_free_device(tpacpi_inputdev);
7882 }
7883
7884 if (tpacpi_hwmon)
7885 hwmon_device_unregister(tpacpi_hwmon);
7886
7887 if (tp_features.sensors_pdev_attrs_registered)
7888 device_remove_file(&tpacpi_sensors_pdev->dev,
7889 &dev_attr_thinkpad_acpi_pdev_name);
7890 if (tpacpi_sensors_pdev)
7891 platform_device_unregister(tpacpi_sensors_pdev);
7892 if (tpacpi_pdev)
7893 platform_device_unregister(tpacpi_pdev);
7894
7895 if (tp_features.sensors_pdrv_attrs_registered)
7896 tpacpi_remove_driver_attributes(&tpacpi_hwmon_pdriver.driver);
7897 if (tp_features.platform_drv_attrs_registered)
7898 tpacpi_remove_driver_attributes(&tpacpi_pdriver.driver);
7899
7900 if (tp_features.sensors_pdrv_registered)
7901 platform_driver_unregister(&tpacpi_hwmon_pdriver);
7902
7903 if (tp_features.platform_drv_registered)
7904 platform_driver_unregister(&tpacpi_pdriver);
7905
7906 if (proc_dir)
7907 remove_proc_entry(TPACPI_PROC_DIR, acpi_root_dir);
7908
7909 if (tpacpi_wq)
7910 destroy_workqueue(tpacpi_wq);
7911
7912 kfree(thinkpad_id.bios_version_str);
7913 kfree(thinkpad_id.ec_version_str);
7914 kfree(thinkpad_id.model_str);
7915 }
7916
7917
7918 static int __init thinkpad_acpi_module_init(void)
7919 {
7920 int ret, i;
7921
7922 tpacpi_lifecycle = TPACPI_LIFE_INIT;
7923
7924 /* Parameter checking */
7925 if (hotkey_report_mode > 2)
7926 return -EINVAL;
7927
7928 /* Driver-level probe */
7929
7930 ret = get_thinkpad_model_data(&thinkpad_id);
7931 if (ret) {
7932 printk(TPACPI_ERR
7933 "unable to get DMI data: %d\n", ret);
7934 thinkpad_acpi_module_exit();
7935 return ret;
7936 }
7937 ret = probe_for_thinkpad();
7938 if (ret) {
7939 thinkpad_acpi_module_exit();
7940 return ret;
7941 }
7942
7943 /* Driver initialization */
7944
7945 TPACPI_ACPIHANDLE_INIT(ecrd);
7946 TPACPI_ACPIHANDLE_INIT(ecwr);
7947
7948 tpacpi_wq = create_singlethread_workqueue(TPACPI_WORKQUEUE_NAME);
7949 if (!tpacpi_wq) {
7950 thinkpad_acpi_module_exit();
7951 return -ENOMEM;
7952 }
7953
7954 proc_dir = proc_mkdir(TPACPI_PROC_DIR, acpi_root_dir);
7955 if (!proc_dir) {
7956 printk(TPACPI_ERR
7957 "unable to create proc dir " TPACPI_PROC_DIR);
7958 thinkpad_acpi_module_exit();
7959 return -ENODEV;
7960 }
7961
7962 ret = platform_driver_register(&tpacpi_pdriver);
7963 if (ret) {
7964 printk(TPACPI_ERR
7965 "unable to register main platform driver\n");
7966 thinkpad_acpi_module_exit();
7967 return ret;
7968 }
7969 tp_features.platform_drv_registered = 1;
7970
7971 ret = platform_driver_register(&tpacpi_hwmon_pdriver);
7972 if (ret) {
7973 printk(TPACPI_ERR
7974 "unable to register hwmon platform driver\n");
7975 thinkpad_acpi_module_exit();
7976 return ret;
7977 }
7978 tp_features.sensors_pdrv_registered = 1;
7979
7980 ret = tpacpi_create_driver_attributes(&tpacpi_pdriver.driver);
7981 if (!ret) {
7982 tp_features.platform_drv_attrs_registered = 1;
7983 ret = tpacpi_create_driver_attributes(
7984 &tpacpi_hwmon_pdriver.driver);
7985 }
7986 if (ret) {
7987 printk(TPACPI_ERR
7988 "unable to create sysfs driver attributes\n");
7989 thinkpad_acpi_module_exit();
7990 return ret;
7991 }
7992 tp_features.sensors_pdrv_attrs_registered = 1;
7993
7994
7995 /* Device initialization */
7996 tpacpi_pdev = platform_device_register_simple(TPACPI_DRVR_NAME, -1,
7997 NULL, 0);
7998 if (IS_ERR(tpacpi_pdev)) {
7999 ret = PTR_ERR(tpacpi_pdev);
8000 tpacpi_pdev = NULL;
8001 printk(TPACPI_ERR "unable to register platform device\n");
8002 thinkpad_acpi_module_exit();
8003 return ret;
8004 }
8005 tpacpi_sensors_pdev = platform_device_register_simple(
8006 TPACPI_HWMON_DRVR_NAME,
8007 -1, NULL, 0);
8008 if (IS_ERR(tpacpi_sensors_pdev)) {
8009 ret = PTR_ERR(tpacpi_sensors_pdev);
8010 tpacpi_sensors_pdev = NULL;
8011 printk(TPACPI_ERR
8012 "unable to register hwmon platform device\n");
8013 thinkpad_acpi_module_exit();
8014 return ret;
8015 }
8016 ret = device_create_file(&tpacpi_sensors_pdev->dev,
8017 &dev_attr_thinkpad_acpi_pdev_name);
8018 if (ret) {
8019 printk(TPACPI_ERR
8020 "unable to create sysfs hwmon device attributes\n");
8021 thinkpad_acpi_module_exit();
8022 return ret;
8023 }
8024 tp_features.sensors_pdev_attrs_registered = 1;
8025 tpacpi_hwmon = hwmon_device_register(&tpacpi_sensors_pdev->dev);
8026 if (IS_ERR(tpacpi_hwmon)) {
8027 ret = PTR_ERR(tpacpi_hwmon);
8028 tpacpi_hwmon = NULL;
8029 printk(TPACPI_ERR "unable to register hwmon device\n");
8030 thinkpad_acpi_module_exit();
8031 return ret;
8032 }
8033 mutex_init(&tpacpi_inputdev_send_mutex);
8034 tpacpi_inputdev = input_allocate_device();
8035 if (!tpacpi_inputdev) {
8036 printk(TPACPI_ERR "unable to allocate input device\n");
8037 thinkpad_acpi_module_exit();
8038 return -ENOMEM;
8039 } else {
8040 /* Prepare input device, but don't register */
8041 tpacpi_inputdev->name = "ThinkPad Extra Buttons";
8042 tpacpi_inputdev->phys = TPACPI_DRVR_NAME "/input0";
8043 tpacpi_inputdev->id.bustype = BUS_HOST;
8044 tpacpi_inputdev->id.vendor = (thinkpad_id.vendor) ?
8045 thinkpad_id.vendor :
8046 PCI_VENDOR_ID_IBM;
8047 tpacpi_inputdev->id.product = TPACPI_HKEY_INPUT_PRODUCT;
8048 tpacpi_inputdev->id.version = TPACPI_HKEY_INPUT_VERSION;
8049 }
8050 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
8051 ret = ibm_init(&ibms_init[i]);
8052 if (ret >= 0 && *ibms_init[i].param)
8053 ret = ibms_init[i].data->write(ibms_init[i].param);
8054 if (ret < 0) {
8055 thinkpad_acpi_module_exit();
8056 return ret;
8057 }
8058 }
8059 ret = input_register_device(tpacpi_inputdev);
8060 if (ret < 0) {
8061 printk(TPACPI_ERR "unable to register input device\n");
8062 thinkpad_acpi_module_exit();
8063 return ret;
8064 } else {
8065 tp_features.input_device_registered = 1;
8066 }
8067
8068 tpacpi_lifecycle = TPACPI_LIFE_RUNNING;
8069 return 0;
8070 }
8071
8072 MODULE_ALIAS(TPACPI_DRVR_SHORTNAME);
8073
8074 /*
8075 * This will autoload the driver in almost every ThinkPad
8076 * in widespread use.
8077 *
8078 * Only _VERY_ old models, like the 240, 240x and 570 lack
8079 * the HKEY event interface.
8080 */
8081 MODULE_DEVICE_TABLE(acpi, ibm_htk_device_ids);
8082
8083 /*
8084 * DMI matching for module autoloading
8085 *
8086 * See http://thinkwiki.org/wiki/List_of_DMI_IDs
8087 * See http://thinkwiki.org/wiki/BIOS_Upgrade_Downloads
8088 *
8089 * Only models listed in thinkwiki will be supported, so add yours
8090 * if it is not there yet.
8091 */
8092 #define IBM_BIOS_MODULE_ALIAS(__type) \
8093 MODULE_ALIAS("dmi:bvnIBM:bvr" __type "ET??WW*")
8094
8095 /* Ancient thinkpad BIOSes have to be identified by
8096 * BIOS type or model number, and there are far less
8097 * BIOS types than model numbers... */
8098 IBM_BIOS_MODULE_ALIAS("I[MU]"); /* 570, 570e */
8099
8100 MODULE_AUTHOR("Borislav Deianov <borislav@users.sf.net>");
8101 MODULE_AUTHOR("Henrique de Moraes Holschuh <hmh@hmh.eng.br>");
8102 MODULE_DESCRIPTION(TPACPI_DESC);
8103 MODULE_VERSION(TPACPI_VERSION);
8104 MODULE_LICENSE("GPL");
8105
8106 module_init(thinkpad_acpi_module_init);
8107 module_exit(thinkpad_acpi_module_exit);
ubuntu-bionic-kernel mirror