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thinkpad-acpi: store fw version with strict checking
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / platform / x86 / thinkpad_acpi.c
blobd2a0ef83fbb580380ea8279b709513dd3c028a70
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 0x020300
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 input_device_registered:1;
268 u32 platform_drv_registered:1;
269 u32 platform_drv_attrs_registered:1;
270 u32 sensors_pdrv_registered:1;
271 u32 sensors_pdrv_attrs_registered:1;
272 u32 sensors_pdev_attrs_registered:1;
273 u32 hotkey_poll_active:1;
274 } tp_features;
275
276 static struct {
277 u16 hotkey_mask_ff:1;
278 } tp_warned;
279
280 struct thinkpad_id_data {
281 unsigned int vendor; /* ThinkPad vendor:
282 * PCI_VENDOR_ID_IBM/PCI_VENDOR_ID_LENOVO */
283
284 char *bios_version_str; /* Something like 1ZET51WW (1.03z) */
285 char *ec_version_str; /* Something like 1ZHT51WW-1.04a */
286
287 u16 bios_model; /* 1Y = 0x5931, 0 = unknown */
288 u16 ec_model;
289 u16 bios_release; /* 1ZETK1WW = 0x314b, 0 = unknown */
290 u16 ec_release;
291
292 char *model_str; /* ThinkPad T43 */
293 char *nummodel_str; /* 9384A9C for a 9384-A9C model */
294 };
295 static struct thinkpad_id_data thinkpad_id;
296
297 static enum {
298 TPACPI_LIFE_INIT = 0,
299 TPACPI_LIFE_RUNNING,
300 TPACPI_LIFE_EXITING,
301 } tpacpi_lifecycle;
302
303 static int experimental;
304 static u32 dbg_level;
305
306 static struct workqueue_struct *tpacpi_wq;
307
308 enum led_status_t {
309 TPACPI_LED_OFF = 0,
310 TPACPI_LED_ON,
311 TPACPI_LED_BLINK,
312 };
313
314 /* Special LED class that can defer work */
315 struct tpacpi_led_classdev {
316 struct led_classdev led_classdev;
317 struct work_struct work;
318 enum led_status_t new_state;
319 unsigned int led;
320 };
321
322 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
323 static int dbg_wlswemul;
324 static int tpacpi_wlsw_emulstate;
325 static int dbg_bluetoothemul;
326 static int tpacpi_bluetooth_emulstate;
327 static int dbg_wwanemul;
328 static int tpacpi_wwan_emulstate;
329 static int dbg_uwbemul;
330 static int tpacpi_uwb_emulstate;
331 #endif
332
333
334 /*************************************************************************
335 * Debugging helpers
336 */
337
338 #define dbg_printk(a_dbg_level, format, arg...) \
339 do { if (dbg_level & (a_dbg_level)) \
340 printk(TPACPI_DEBUG "%s: " format, __func__ , ## arg); \
341 } while (0)
342
343 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
344 #define vdbg_printk dbg_printk
345 static const char *str_supported(int is_supported);
346 #else
347 #define vdbg_printk(a_dbg_level, format, arg...) \
348 do { } while (0)
349 #endif
350
351 static void tpacpi_log_usertask(const char * const what)
352 {
353 printk(TPACPI_DEBUG "%s: access by process with PID %d\n",
354 what, task_tgid_vnr(current));
355 }
356
357 #define tpacpi_disclose_usertask(what, format, arg...) \
358 do { \
359 if (unlikely( \
360 (dbg_level & TPACPI_DBG_DISCLOSETASK) && \
361 (tpacpi_lifecycle == TPACPI_LIFE_RUNNING))) { \
362 printk(TPACPI_DEBUG "%s: PID %d: " format, \
363 what, task_tgid_vnr(current), ## arg); \
364 } \
365 } while (0)
366
367 /****************************************************************************
368 ****************************************************************************
369 *
370 * ACPI Helpers and device model
371 *
372 ****************************************************************************
373 ****************************************************************************/
374
375 /*************************************************************************
376 * ACPI basic handles
377 */
378
379 static acpi_handle root_handle;
380
381 #define TPACPI_HANDLE(object, parent, paths...) \
382 static acpi_handle object##_handle; \
383 static acpi_handle *object##_parent = &parent##_handle; \
384 static char *object##_path; \
385 static char *object##_paths[] = { paths }
386
387 TPACPI_HANDLE(ec, root, "\\_SB.PCI0.ISA.EC0", /* 240, 240x */
388 "\\_SB.PCI.ISA.EC", /* 570 */
389 "\\_SB.PCI0.ISA0.EC0", /* 600e/x, 770e, 770x */
390 "\\_SB.PCI0.ISA.EC", /* A21e, A2xm/p, T20-22, X20-21 */
391 "\\_SB.PCI0.AD4S.EC0", /* i1400, R30 */
392 "\\_SB.PCI0.ICH3.EC0", /* R31 */
393 "\\_SB.PCI0.LPC.EC", /* all others */
394 );
395
396 TPACPI_HANDLE(ecrd, ec, "ECRD"); /* 570 */
397 TPACPI_HANDLE(ecwr, ec, "ECWR"); /* 570 */
398
399 TPACPI_HANDLE(cmos, root, "\\UCMS", /* R50, R50e, R50p, R51, */
400 /* T4x, X31, X40 */
401 "\\CMOS", /* A3x, G4x, R32, T23, T30, X22-24, X30 */
402 "\\CMS", /* R40, R40e */
403 ); /* all others */
404
405 TPACPI_HANDLE(hkey, ec, "\\_SB.HKEY", /* 600e/x, 770e, 770x */
406 "^HKEY", /* R30, R31 */
407 "HKEY", /* all others */
408 ); /* 570 */
409
410 TPACPI_HANDLE(vid, root, "\\_SB.PCI.AGP.VGA", /* 570 */
411 "\\_SB.PCI0.AGP0.VID0", /* 600e/x, 770x */
412 "\\_SB.PCI0.VID0", /* 770e */
413 "\\_SB.PCI0.VID", /* A21e, G4x, R50e, X30, X40 */
414 "\\_SB.PCI0.AGP.VID", /* all others */
415 ); /* R30, R31 */
416
417
418 /*************************************************************************
419 * ACPI helpers
420 */
421
422 static int acpi_evalf(acpi_handle handle,
423 void *res, char *method, char *fmt, ...)
424 {
425 char *fmt0 = fmt;
426 struct acpi_object_list params;
427 union acpi_object in_objs[TPACPI_MAX_ACPI_ARGS];
428 struct acpi_buffer result, *resultp;
429 union acpi_object out_obj;
430 acpi_status status;
431 va_list ap;
432 char res_type;
433 int success;
434 int quiet;
435
436 if (!*fmt) {
437 printk(TPACPI_ERR "acpi_evalf() called with empty format\n");
438 return 0;
439 }
440
441 if (*fmt == 'q') {
442 quiet = 1;
443 fmt++;
444 } else
445 quiet = 0;
446
447 res_type = *(fmt++);
448
449 params.count = 0;
450 params.pointer = &in_objs[0];
451
452 va_start(ap, fmt);
453 while (*fmt) {
454 char c = *(fmt++);
455 switch (c) {
456 case 'd': /* int */
457 in_objs[params.count].integer.value = va_arg(ap, int);
458 in_objs[params.count++].type = ACPI_TYPE_INTEGER;
459 break;
460 /* add more types as needed */
461 default:
462 printk(TPACPI_ERR "acpi_evalf() called "
463 "with invalid format character '%c'\n", c);
464 return 0;
465 }
466 }
467 va_end(ap);
468
469 if (res_type != 'v') {
470 result.length = sizeof(out_obj);
471 result.pointer = &out_obj;
472 resultp = &result;
473 } else
474 resultp = NULL;
475
476 status = acpi_evaluate_object(handle, method, &params, resultp);
477
478 switch (res_type) {
479 case 'd': /* int */
480 if (res)
481 *(int *)res = out_obj.integer.value;
482 success = status == AE_OK && out_obj.type == ACPI_TYPE_INTEGER;
483 break;
484 case 'v': /* void */
485 success = status == AE_OK;
486 break;
487 /* add more types as needed */
488 default:
489 printk(TPACPI_ERR "acpi_evalf() called "
490 "with invalid format character '%c'\n", res_type);
491 return 0;
492 }
493
494 if (!success && !quiet)
495 printk(TPACPI_ERR "acpi_evalf(%s, %s, ...) failed: %d\n",
496 method, fmt0, status);
497
498 return success;
499 }
500
501 static int acpi_ec_read(int i, u8 *p)
502 {
503 int v;
504
505 if (ecrd_handle) {
506 if (!acpi_evalf(ecrd_handle, &v, NULL, "dd", i))
507 return 0;
508 *p = v;
509 } else {
510 if (ec_read(i, p) < 0)
511 return 0;
512 }
513
514 return 1;
515 }
516
517 static int acpi_ec_write(int i, u8 v)
518 {
519 if (ecwr_handle) {
520 if (!acpi_evalf(ecwr_handle, NULL, NULL, "vdd", i, v))
521 return 0;
522 } else {
523 if (ec_write(i, v) < 0)
524 return 0;
525 }
526
527 return 1;
528 }
529
530 #if defined(CONFIG_THINKPAD_ACPI_DOCK) || defined(CONFIG_THINKPAD_ACPI_BAY)
531 static int _sta(acpi_handle handle)
532 {
533 int status;
534
535 if (!handle || !acpi_evalf(handle, &status, "_STA", "d"))
536 status = 0;
537
538 return status;
539 }
540 #endif
541
542 static int issue_thinkpad_cmos_command(int cmos_cmd)
543 {
544 if (!cmos_handle)
545 return -ENXIO;
546
547 if (!acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd))
548 return -EIO;
549
550 return 0;
551 }
552
553 /*************************************************************************
554 * ACPI device model
555 */
556
557 #define TPACPI_ACPIHANDLE_INIT(object) \
558 drv_acpi_handle_init(#object, &object##_handle, *object##_parent, \
559 object##_paths, ARRAY_SIZE(object##_paths), &object##_path)
560
561 static void drv_acpi_handle_init(char *name,
562 acpi_handle *handle, acpi_handle parent,
563 char **paths, int num_paths, char **path)
564 {
565 int i;
566 acpi_status status;
567
568 vdbg_printk(TPACPI_DBG_INIT, "trying to locate ACPI handle for %s\n",
569 name);
570
571 for (i = 0; i < num_paths; i++) {
572 status = acpi_get_handle(parent, paths[i], handle);
573 if (ACPI_SUCCESS(status)) {
574 *path = paths[i];
575 dbg_printk(TPACPI_DBG_INIT,
576 "Found ACPI handle %s for %s\n",
577 *path, name);
578 return;
579 }
580 }
581
582 vdbg_printk(TPACPI_DBG_INIT, "ACPI handle for %s not found\n",
583 name);
584 *handle = NULL;
585 }
586
587 static void dispatch_acpi_notify(acpi_handle handle, u32 event, void *data)
588 {
589 struct ibm_struct *ibm = data;
590
591 if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
592 return;
593
594 if (!ibm || !ibm->acpi || !ibm->acpi->notify)
595 return;
596
597 ibm->acpi->notify(ibm, event);
598 }
599
600 static int __init setup_acpi_notify(struct ibm_struct *ibm)
601 {
602 acpi_status status;
603 int rc;
604
605 BUG_ON(!ibm->acpi);
606
607 if (!*ibm->acpi->handle)
608 return 0;
609
610 vdbg_printk(TPACPI_DBG_INIT,
611 "setting up ACPI notify for %s\n", ibm->name);
612
613 rc = acpi_bus_get_device(*ibm->acpi->handle, &ibm->acpi->device);
614 if (rc < 0) {
615 printk(TPACPI_ERR "acpi_bus_get_device(%s) failed: %d\n",
616 ibm->name, rc);
617 return -ENODEV;
618 }
619
620 ibm->acpi->device->driver_data = ibm;
621 sprintf(acpi_device_class(ibm->acpi->device), "%s/%s",
622 TPACPI_ACPI_EVENT_PREFIX,
623 ibm->name);
624
625 status = acpi_install_notify_handler(*ibm->acpi->handle,
626 ibm->acpi->type, dispatch_acpi_notify, ibm);
627 if (ACPI_FAILURE(status)) {
628 if (status == AE_ALREADY_EXISTS) {
629 printk(TPACPI_NOTICE
630 "another device driver is already "
631 "handling %s events\n", ibm->name);
632 } else {
633 printk(TPACPI_ERR
634 "acpi_install_notify_handler(%s) failed: %d\n",
635 ibm->name, status);
636 }
637 return -ENODEV;
638 }
639 ibm->flags.acpi_notify_installed = 1;
640 return 0;
641 }
642
643 static int __init tpacpi_device_add(struct acpi_device *device)
644 {
645 return 0;
646 }
647
648 static int __init register_tpacpi_subdriver(struct ibm_struct *ibm)
649 {
650 int rc;
651
652 dbg_printk(TPACPI_DBG_INIT,
653 "registering %s as an ACPI driver\n", ibm->name);
654
655 BUG_ON(!ibm->acpi);
656
657 ibm->acpi->driver = kzalloc(sizeof(struct acpi_driver), GFP_KERNEL);
658 if (!ibm->acpi->driver) {
659 printk(TPACPI_ERR
660 "failed to allocate memory for ibm->acpi->driver\n");
661 return -ENOMEM;
662 }
663
664 sprintf(ibm->acpi->driver->name, "%s_%s", TPACPI_NAME, ibm->name);
665 ibm->acpi->driver->ids = ibm->acpi->hid;
666
667 ibm->acpi->driver->ops.add = &tpacpi_device_add;
668
669 rc = acpi_bus_register_driver(ibm->acpi->driver);
670 if (rc < 0) {
671 printk(TPACPI_ERR "acpi_bus_register_driver(%s) failed: %d\n",
672 ibm->name, rc);
673 kfree(ibm->acpi->driver);
674 ibm->acpi->driver = NULL;
675 } else if (!rc)
676 ibm->flags.acpi_driver_registered = 1;
677
678 return rc;
679 }
680
681
682 /****************************************************************************
683 ****************************************************************************
684 *
685 * Procfs Helpers
686 *
687 ****************************************************************************
688 ****************************************************************************/
689
690 static int dispatch_procfs_read(char *page, char **start, off_t off,
691 int count, int *eof, void *data)
692 {
693 struct ibm_struct *ibm = data;
694 int len;
695
696 if (!ibm || !ibm->read)
697 return -EINVAL;
698
699 len = ibm->read(page);
700 if (len < 0)
701 return len;
702
703 if (len <= off + count)
704 *eof = 1;
705 *start = page + off;
706 len -= off;
707 if (len > count)
708 len = count;
709 if (len < 0)
710 len = 0;
711
712 return len;
713 }
714
715 static int dispatch_procfs_write(struct file *file,
716 const char __user *userbuf,
717 unsigned long count, void *data)
718 {
719 struct ibm_struct *ibm = data;
720 char *kernbuf;
721 int ret;
722
723 if (!ibm || !ibm->write)
724 return -EINVAL;
725
726 kernbuf = kmalloc(count + 2, GFP_KERNEL);
727 if (!kernbuf)
728 return -ENOMEM;
729
730 if (copy_from_user(kernbuf, userbuf, count)) {
731 kfree(kernbuf);
732 return -EFAULT;
733 }
734
735 kernbuf[count] = 0;
736 strcat(kernbuf, ",");
737 ret = ibm->write(kernbuf);
738 if (ret == 0)
739 ret = count;
740
741 kfree(kernbuf);
742
743 return ret;
744 }
745
746 static char *next_cmd(char **cmds)
747 {
748 char *start = *cmds;
749 char *end;
750
751 while ((end = strchr(start, ',')) && end == start)
752 start = end + 1;
753
754 if (!end)
755 return NULL;
756
757 *end = 0;
758 *cmds = end + 1;
759 return start;
760 }
761
762
763 /****************************************************************************
764 ****************************************************************************
765 *
766 * Device model: input, hwmon and platform
767 *
768 ****************************************************************************
769 ****************************************************************************/
770
771 static struct platform_device *tpacpi_pdev;
772 static struct platform_device *tpacpi_sensors_pdev;
773 static struct device *tpacpi_hwmon;
774 static struct input_dev *tpacpi_inputdev;
775 static struct mutex tpacpi_inputdev_send_mutex;
776 static LIST_HEAD(tpacpi_all_drivers);
777
778 static int tpacpi_suspend_handler(struct platform_device *pdev,
779 pm_message_t state)
780 {
781 struct ibm_struct *ibm, *itmp;
782
783 list_for_each_entry_safe(ibm, itmp,
784 &tpacpi_all_drivers,
785 all_drivers) {
786 if (ibm->suspend)
787 (ibm->suspend)(state);
788 }
789
790 return 0;
791 }
792
793 static int tpacpi_resume_handler(struct platform_device *pdev)
794 {
795 struct ibm_struct *ibm, *itmp;
796
797 list_for_each_entry_safe(ibm, itmp,
798 &tpacpi_all_drivers,
799 all_drivers) {
800 if (ibm->resume)
801 (ibm->resume)();
802 }
803
804 return 0;
805 }
806
807 static void tpacpi_shutdown_handler(struct platform_device *pdev)
808 {
809 struct ibm_struct *ibm, *itmp;
810
811 list_for_each_entry_safe(ibm, itmp,
812 &tpacpi_all_drivers,
813 all_drivers) {
814 if (ibm->shutdown)
815 (ibm->shutdown)();
816 }
817 }
818
819 static struct platform_driver tpacpi_pdriver = {
820 .driver = {
821 .name = TPACPI_DRVR_NAME,
822 .owner = THIS_MODULE,
823 },
824 .suspend = tpacpi_suspend_handler,
825 .resume = tpacpi_resume_handler,
826 .shutdown = tpacpi_shutdown_handler,
827 };
828
829 static struct platform_driver tpacpi_hwmon_pdriver = {
830 .driver = {
831 .name = TPACPI_HWMON_DRVR_NAME,
832 .owner = THIS_MODULE,
833 },
834 };
835
836 /*************************************************************************
837 * sysfs support helpers
838 */
839
840 struct attribute_set {
841 unsigned int members, max_members;
842 struct attribute_group group;
843 };
844
845 struct attribute_set_obj {
846 struct attribute_set s;
847 struct attribute *a;
848 } __attribute__((packed));
849
850 static struct attribute_set *create_attr_set(unsigned int max_members,
851 const char *name)
852 {
853 struct attribute_set_obj *sobj;
854
855 if (max_members == 0)
856 return NULL;
857
858 /* Allocates space for implicit NULL at the end too */
859 sobj = kzalloc(sizeof(struct attribute_set_obj) +
860 max_members * sizeof(struct attribute *),
861 GFP_KERNEL);
862 if (!sobj)
863 return NULL;
864 sobj->s.max_members = max_members;
865 sobj->s.group.attrs = &sobj->a;
866 sobj->s.group.name = name;
867
868 return &sobj->s;
869 }
870
871 #define destroy_attr_set(_set) \
872 kfree(_set);
873
874 /* not multi-threaded safe, use it in a single thread per set */
875 static int add_to_attr_set(struct attribute_set *s, struct attribute *attr)
876 {
877 if (!s || !attr)
878 return -EINVAL;
879
880 if (s->members >= s->max_members)
881 return -ENOMEM;
882
883 s->group.attrs[s->members] = attr;
884 s->members++;
885
886 return 0;
887 }
888
889 static int add_many_to_attr_set(struct attribute_set *s,
890 struct attribute **attr,
891 unsigned int count)
892 {
893 int i, res;
894
895 for (i = 0; i < count; i++) {
896 res = add_to_attr_set(s, attr[i]);
897 if (res)
898 return res;
899 }
900
901 return 0;
902 }
903
904 static void delete_attr_set(struct attribute_set *s, struct kobject *kobj)
905 {
906 sysfs_remove_group(kobj, &s->group);
907 destroy_attr_set(s);
908 }
909
910 #define register_attr_set_with_sysfs(_attr_set, _kobj) \
911 sysfs_create_group(_kobj, &_attr_set->group)
912
913 static int parse_strtoul(const char *buf,
914 unsigned long max, unsigned long *value)
915 {
916 char *endp;
917
918 while (*buf && isspace(*buf))
919 buf++;
920 *value = simple_strtoul(buf, &endp, 0);
921 while (*endp && isspace(*endp))
922 endp++;
923 if (*endp || *value > max)
924 return -EINVAL;
925
926 return 0;
927 }
928
929 static void tpacpi_disable_brightness_delay(void)
930 {
931 if (acpi_evalf(hkey_handle, NULL, "PWMS", "qvd", 0))
932 printk(TPACPI_NOTICE
933 "ACPI backlight control delay disabled\n");
934 }
935
936 static int __init tpacpi_query_bcl_levels(acpi_handle handle)
937 {
938 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
939 union acpi_object *obj;
940 int rc;
941
942 if (ACPI_SUCCESS(acpi_evaluate_object(handle, NULL, NULL, &buffer))) {
943 obj = (union acpi_object *)buffer.pointer;
944 if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) {
945 printk(TPACPI_ERR "Unknown _BCL data, "
946 "please report this to %s\n", TPACPI_MAIL);
947 rc = 0;
948 } else {
949 rc = obj->package.count;
950 }
951 } else {
952 return 0;
953 }
954
955 kfree(buffer.pointer);
956 return rc;
957 }
958
959 static acpi_status __init tpacpi_acpi_walk_find_bcl(acpi_handle handle,
960 u32 lvl, void *context, void **rv)
961 {
962 char name[ACPI_PATH_SEGMENT_LENGTH];
963 struct acpi_buffer buffer = { sizeof(name), &name };
964
965 if (ACPI_SUCCESS(acpi_get_name(handle, ACPI_SINGLE_NAME, &buffer)) &&
966 !strncmp("_BCL", name, sizeof(name) - 1)) {
967 BUG_ON(!rv || !*rv);
968 **(int **)rv = tpacpi_query_bcl_levels(handle);
969 return AE_CTRL_TERMINATE;
970 } else {
971 return AE_OK;
972 }
973 }
974
975 /*
976 * Returns 0 (no ACPI _BCL or _BCL invalid), or size of brightness map
977 */
978 static int __init tpacpi_check_std_acpi_brightness_support(void)
979 {
980 int status;
981 int bcl_levels = 0;
982 void *bcl_ptr = &bcl_levels;
983
984 if (!vid_handle) {
985 TPACPI_ACPIHANDLE_INIT(vid);
986 }
987 if (!vid_handle)
988 return 0;
989
990 /*
991 * Search for a _BCL method, and execute it. This is safe on all
992 * ThinkPads, and as a side-effect, _BCL will place a Lenovo Vista
993 * BIOS in ACPI backlight control mode. We do NOT have to care
994 * about calling the _BCL method in an enabled video device, any
995 * will do for our purposes.
996 */
997
998 status = acpi_walk_namespace(ACPI_TYPE_METHOD, vid_handle, 3,
999 tpacpi_acpi_walk_find_bcl, NULL,
1000 &bcl_ptr);
1001
1002 if (ACPI_SUCCESS(status) && bcl_levels > 2) {
1003 tp_features.bright_acpimode = 1;
1004 return (bcl_levels - 2);
1005 }
1006
1007 return 0;
1008 }
1009
1010 static int __init tpacpi_new_rfkill(const unsigned int id,
1011 struct rfkill **rfk,
1012 const enum rfkill_type rfktype,
1013 const char *name,
1014 const bool set_default,
1015 int (*toggle_radio)(void *, enum rfkill_state),
1016 int (*get_state)(void *, enum rfkill_state *))
1017 {
1018 int res;
1019 enum rfkill_state initial_state = RFKILL_STATE_SOFT_BLOCKED;
1020
1021 res = get_state(NULL, &initial_state);
1022 if (res < 0) {
1023 printk(TPACPI_ERR
1024 "failed to read initial state for %s, error %d; "
1025 "will turn radio off\n", name, res);
1026 } else if (set_default) {
1027 /* try to set the initial state as the default for the rfkill
1028 * type, since we ask the firmware to preserve it across S5 in
1029 * NVRAM */
1030 if (rfkill_set_default(rfktype,
1031 (initial_state == RFKILL_STATE_UNBLOCKED) ?
1032 RFKILL_STATE_UNBLOCKED :
1033 RFKILL_STATE_SOFT_BLOCKED) == -EPERM)
1034 vdbg_printk(TPACPI_DBG_RFKILL,
1035 "Default state for %s cannot be changed\n",
1036 name);
1037 }
1038
1039 *rfk = rfkill_allocate(&tpacpi_pdev->dev, rfktype);
1040 if (!*rfk) {
1041 printk(TPACPI_ERR
1042 "failed to allocate memory for rfkill class\n");
1043 return -ENOMEM;
1044 }
1045
1046 (*rfk)->name = name;
1047 (*rfk)->get_state = get_state;
1048 (*rfk)->toggle_radio = toggle_radio;
1049 (*rfk)->state = initial_state;
1050
1051 res = rfkill_register(*rfk);
1052 if (res < 0) {
1053 printk(TPACPI_ERR
1054 "failed to register %s rfkill switch: %d\n",
1055 name, res);
1056 rfkill_free(*rfk);
1057 *rfk = NULL;
1058 return res;
1059 }
1060
1061 return 0;
1062 }
1063
1064 static void printk_deprecated_attribute(const char * const what,
1065 const char * const details)
1066 {
1067 tpacpi_log_usertask("deprecated sysfs attribute");
1068 printk(TPACPI_WARN "WARNING: sysfs attribute %s is deprecated and "
1069 "will be removed. %s\n",
1070 what, details);
1071 }
1072
1073 static void printk_deprecated_rfkill_attribute(const char * const what)
1074 {
1075 printk_deprecated_attribute(what,
1076 "Please switch to generic rfkill before year 2010");
1077 }
1078
1079 /*************************************************************************
1080 * thinkpad-acpi driver attributes
1081 */
1082
1083 /* interface_version --------------------------------------------------- */
1084 static ssize_t tpacpi_driver_interface_version_show(
1085 struct device_driver *drv,
1086 char *buf)
1087 {
1088 return snprintf(buf, PAGE_SIZE, "0x%08x\n", TPACPI_SYSFS_VERSION);
1089 }
1090
1091 static DRIVER_ATTR(interface_version, S_IRUGO,
1092 tpacpi_driver_interface_version_show, NULL);
1093
1094 /* debug_level --------------------------------------------------------- */
1095 static ssize_t tpacpi_driver_debug_show(struct device_driver *drv,
1096 char *buf)
1097 {
1098 return snprintf(buf, PAGE_SIZE, "0x%04x\n", dbg_level);
1099 }
1100
1101 static ssize_t tpacpi_driver_debug_store(struct device_driver *drv,
1102 const char *buf, size_t count)
1103 {
1104 unsigned long t;
1105
1106 if (parse_strtoul(buf, 0xffff, &t))
1107 return -EINVAL;
1108
1109 dbg_level = t;
1110
1111 return count;
1112 }
1113
1114 static DRIVER_ATTR(debug_level, S_IWUSR | S_IRUGO,
1115 tpacpi_driver_debug_show, tpacpi_driver_debug_store);
1116
1117 /* version ------------------------------------------------------------- */
1118 static ssize_t tpacpi_driver_version_show(struct device_driver *drv,
1119 char *buf)
1120 {
1121 return snprintf(buf, PAGE_SIZE, "%s v%s\n",
1122 TPACPI_DESC, TPACPI_VERSION);
1123 }
1124
1125 static DRIVER_ATTR(version, S_IRUGO,
1126 tpacpi_driver_version_show, NULL);
1127
1128 /* --------------------------------------------------------------------- */
1129
1130 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
1131
1132 static void tpacpi_send_radiosw_update(void);
1133
1134 /* wlsw_emulstate ------------------------------------------------------ */
1135 static ssize_t tpacpi_driver_wlsw_emulstate_show(struct device_driver *drv,
1136 char *buf)
1137 {
1138 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_wlsw_emulstate);
1139 }
1140
1141 static ssize_t tpacpi_driver_wlsw_emulstate_store(struct device_driver *drv,
1142 const char *buf, size_t count)
1143 {
1144 unsigned long t;
1145
1146 if (parse_strtoul(buf, 1, &t))
1147 return -EINVAL;
1148
1149 if (tpacpi_wlsw_emulstate != t) {
1150 tpacpi_wlsw_emulstate = !!t;
1151 tpacpi_send_radiosw_update();
1152 } else
1153 tpacpi_wlsw_emulstate = !!t;
1154
1155 return count;
1156 }
1157
1158 static DRIVER_ATTR(wlsw_emulstate, S_IWUSR | S_IRUGO,
1159 tpacpi_driver_wlsw_emulstate_show,
1160 tpacpi_driver_wlsw_emulstate_store);
1161
1162 /* bluetooth_emulstate ------------------------------------------------- */
1163 static ssize_t tpacpi_driver_bluetooth_emulstate_show(
1164 struct device_driver *drv,
1165 char *buf)
1166 {
1167 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_bluetooth_emulstate);
1168 }
1169
1170 static ssize_t tpacpi_driver_bluetooth_emulstate_store(
1171 struct device_driver *drv,
1172 const char *buf, size_t count)
1173 {
1174 unsigned long t;
1175
1176 if (parse_strtoul(buf, 1, &t))
1177 return -EINVAL;
1178
1179 tpacpi_bluetooth_emulstate = !!t;
1180
1181 return count;
1182 }
1183
1184 static DRIVER_ATTR(bluetooth_emulstate, S_IWUSR | S_IRUGO,
1185 tpacpi_driver_bluetooth_emulstate_show,
1186 tpacpi_driver_bluetooth_emulstate_store);
1187
1188 /* wwan_emulstate ------------------------------------------------- */
1189 static ssize_t tpacpi_driver_wwan_emulstate_show(
1190 struct device_driver *drv,
1191 char *buf)
1192 {
1193 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_wwan_emulstate);
1194 }
1195
1196 static ssize_t tpacpi_driver_wwan_emulstate_store(
1197 struct device_driver *drv,
1198 const char *buf, size_t count)
1199 {
1200 unsigned long t;
1201
1202 if (parse_strtoul(buf, 1, &t))
1203 return -EINVAL;
1204
1205 tpacpi_wwan_emulstate = !!t;
1206
1207 return count;
1208 }
1209
1210 static DRIVER_ATTR(wwan_emulstate, S_IWUSR | S_IRUGO,
1211 tpacpi_driver_wwan_emulstate_show,
1212 tpacpi_driver_wwan_emulstate_store);
1213
1214 /* uwb_emulstate ------------------------------------------------- */
1215 static ssize_t tpacpi_driver_uwb_emulstate_show(
1216 struct device_driver *drv,
1217 char *buf)
1218 {
1219 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_uwb_emulstate);
1220 }
1221
1222 static ssize_t tpacpi_driver_uwb_emulstate_store(
1223 struct device_driver *drv,
1224 const char *buf, size_t count)
1225 {
1226 unsigned long t;
1227
1228 if (parse_strtoul(buf, 1, &t))
1229 return -EINVAL;
1230
1231 tpacpi_uwb_emulstate = !!t;
1232
1233 return count;
1234 }
1235
1236 static DRIVER_ATTR(uwb_emulstate, S_IWUSR | S_IRUGO,
1237 tpacpi_driver_uwb_emulstate_show,
1238 tpacpi_driver_uwb_emulstate_store);
1239 #endif
1240
1241 /* --------------------------------------------------------------------- */
1242
1243 static struct driver_attribute *tpacpi_driver_attributes[] = {
1244 &driver_attr_debug_level, &driver_attr_version,
1245 &driver_attr_interface_version,
1246 };
1247
1248 static int __init tpacpi_create_driver_attributes(struct device_driver *drv)
1249 {
1250 int i, res;
1251
1252 i = 0;
1253 res = 0;
1254 while (!res && i < ARRAY_SIZE(tpacpi_driver_attributes)) {
1255 res = driver_create_file(drv, tpacpi_driver_attributes[i]);
1256 i++;
1257 }
1258
1259 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
1260 if (!res && dbg_wlswemul)
1261 res = driver_create_file(drv, &driver_attr_wlsw_emulstate);
1262 if (!res && dbg_bluetoothemul)
1263 res = driver_create_file(drv, &driver_attr_bluetooth_emulstate);
1264 if (!res && dbg_wwanemul)
1265 res = driver_create_file(drv, &driver_attr_wwan_emulstate);
1266 if (!res && dbg_uwbemul)
1267 res = driver_create_file(drv, &driver_attr_uwb_emulstate);
1268 #endif
1269
1270 return res;
1271 }
1272
1273 static void tpacpi_remove_driver_attributes(struct device_driver *drv)
1274 {
1275 int i;
1276
1277 for (i = 0; i < ARRAY_SIZE(tpacpi_driver_attributes); i++)
1278 driver_remove_file(drv, tpacpi_driver_attributes[i]);
1279
1280 #ifdef THINKPAD_ACPI_DEBUGFACILITIES
1281 driver_remove_file(drv, &driver_attr_wlsw_emulstate);
1282 driver_remove_file(drv, &driver_attr_bluetooth_emulstate);
1283 driver_remove_file(drv, &driver_attr_wwan_emulstate);
1284 driver_remove_file(drv, &driver_attr_uwb_emulstate);
1285 #endif
1286 }
1287
1288 /****************************************************************************
1289 ****************************************************************************
1290 *
1291 * Subdrivers
1292 *
1293 ****************************************************************************
1294 ****************************************************************************/
1295
1296 /*************************************************************************
1297 * thinkpad-acpi init subdriver
1298 */
1299
1300 static int __init thinkpad_acpi_driver_init(struct ibm_init_struct *iibm)
1301 {
1302 printk(TPACPI_INFO "%s v%s\n", TPACPI_DESC, TPACPI_VERSION);
1303 printk(TPACPI_INFO "%s\n", TPACPI_URL);
1304
1305 printk(TPACPI_INFO "ThinkPad BIOS %s, EC %s\n",
1306 (thinkpad_id.bios_version_str) ?
1307 thinkpad_id.bios_version_str : "unknown",
1308 (thinkpad_id.ec_version_str) ?
1309 thinkpad_id.ec_version_str : "unknown");
1310
1311 if (thinkpad_id.vendor && thinkpad_id.model_str)
1312 printk(TPACPI_INFO "%s %s, model %s\n",
1313 (thinkpad_id.vendor == PCI_VENDOR_ID_IBM) ?
1314 "IBM" : ((thinkpad_id.vendor ==
1315 PCI_VENDOR_ID_LENOVO) ?
1316 "Lenovo" : "Unknown vendor"),
1317 thinkpad_id.model_str,
1318 (thinkpad_id.nummodel_str) ?
1319 thinkpad_id.nummodel_str : "unknown");
1320
1321 return 0;
1322 }
1323
1324 static int thinkpad_acpi_driver_read(char *p)
1325 {
1326 int len = 0;
1327
1328 len += sprintf(p + len, "driver:\t\t%s\n", TPACPI_DESC);
1329 len += sprintf(p + len, "version:\t%s\n", TPACPI_VERSION);
1330
1331 return len;
1332 }
1333
1334 static struct ibm_struct thinkpad_acpi_driver_data = {
1335 .name = "driver",
1336 .read = thinkpad_acpi_driver_read,
1337 };
1338
1339 /*************************************************************************
1340 * Hotkey subdriver
1341 */
1342
1343 enum { /* hot key scan codes (derived from ACPI DSDT) */
1344 TP_ACPI_HOTKEYSCAN_FNF1 = 0,
1345 TP_ACPI_HOTKEYSCAN_FNF2,
1346 TP_ACPI_HOTKEYSCAN_FNF3,
1347 TP_ACPI_HOTKEYSCAN_FNF4,
1348 TP_ACPI_HOTKEYSCAN_FNF5,
1349 TP_ACPI_HOTKEYSCAN_FNF6,
1350 TP_ACPI_HOTKEYSCAN_FNF7,
1351 TP_ACPI_HOTKEYSCAN_FNF8,
1352 TP_ACPI_HOTKEYSCAN_FNF9,
1353 TP_ACPI_HOTKEYSCAN_FNF10,
1354 TP_ACPI_HOTKEYSCAN_FNF11,
1355 TP_ACPI_HOTKEYSCAN_FNF12,
1356 TP_ACPI_HOTKEYSCAN_FNBACKSPACE,
1357 TP_ACPI_HOTKEYSCAN_FNINSERT,
1358 TP_ACPI_HOTKEYSCAN_FNDELETE,
1359 TP_ACPI_HOTKEYSCAN_FNHOME,
1360 TP_ACPI_HOTKEYSCAN_FNEND,
1361 TP_ACPI_HOTKEYSCAN_FNPAGEUP,
1362 TP_ACPI_HOTKEYSCAN_FNPAGEDOWN,
1363 TP_ACPI_HOTKEYSCAN_FNSPACE,
1364 TP_ACPI_HOTKEYSCAN_VOLUMEUP,
1365 TP_ACPI_HOTKEYSCAN_VOLUMEDOWN,
1366 TP_ACPI_HOTKEYSCAN_MUTE,
1367 TP_ACPI_HOTKEYSCAN_THINKPAD,
1368 };
1369
1370 enum { /* Keys available through NVRAM polling */
1371 TPACPI_HKEY_NVRAM_KNOWN_MASK = 0x00fb88c0U,
1372 TPACPI_HKEY_NVRAM_GOOD_MASK = 0x00fb8000U,
1373 };
1374
1375 enum { /* Positions of some of the keys in hotkey masks */
1376 TP_ACPI_HKEY_DISPSWTCH_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF7,
1377 TP_ACPI_HKEY_DISPXPAND_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF8,
1378 TP_ACPI_HKEY_HIBERNATE_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF12,
1379 TP_ACPI_HKEY_BRGHTUP_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNHOME,
1380 TP_ACPI_HKEY_BRGHTDWN_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNEND,
1381 TP_ACPI_HKEY_THNKLGHT_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNPAGEUP,
1382 TP_ACPI_HKEY_ZOOM_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNSPACE,
1383 TP_ACPI_HKEY_VOLUP_MASK = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEUP,
1384 TP_ACPI_HKEY_VOLDWN_MASK = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEDOWN,
1385 TP_ACPI_HKEY_MUTE_MASK = 1 << TP_ACPI_HOTKEYSCAN_MUTE,
1386 TP_ACPI_HKEY_THINKPAD_MASK = 1 << TP_ACPI_HOTKEYSCAN_THINKPAD,
1387 };
1388
1389 enum { /* NVRAM to ACPI HKEY group map */
1390 TP_NVRAM_HKEY_GROUP_HK2 = TP_ACPI_HKEY_THINKPAD_MASK |
1391 TP_ACPI_HKEY_ZOOM_MASK |
1392 TP_ACPI_HKEY_DISPSWTCH_MASK |
1393 TP_ACPI_HKEY_HIBERNATE_MASK,
1394 TP_NVRAM_HKEY_GROUP_BRIGHTNESS = TP_ACPI_HKEY_BRGHTUP_MASK |
1395 TP_ACPI_HKEY_BRGHTDWN_MASK,
1396 TP_NVRAM_HKEY_GROUP_VOLUME = TP_ACPI_HKEY_VOLUP_MASK |
1397 TP_ACPI_HKEY_VOLDWN_MASK |
1398 TP_ACPI_HKEY_MUTE_MASK,
1399 };
1400
1401 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1402 struct tp_nvram_state {
1403 u16 thinkpad_toggle:1;
1404 u16 zoom_toggle:1;
1405 u16 display_toggle:1;
1406 u16 thinklight_toggle:1;
1407 u16 hibernate_toggle:1;
1408 u16 displayexp_toggle:1;
1409 u16 display_state:1;
1410 u16 brightness_toggle:1;
1411 u16 volume_toggle:1;
1412 u16 mute:1;
1413
1414 u8 brightness_level;
1415 u8 volume_level;
1416 };
1417
1418 static struct task_struct *tpacpi_hotkey_task;
1419 static u32 hotkey_source_mask; /* bit mask 0=ACPI,1=NVRAM */
1420 static int hotkey_poll_freq = 10; /* Hz */
1421 static struct mutex hotkey_thread_mutex;
1422 static struct mutex hotkey_thread_data_mutex;
1423 static unsigned int hotkey_config_change;
1424
1425 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1426
1427 #define hotkey_source_mask 0U
1428
1429 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1430
1431 static struct mutex hotkey_mutex;
1432
1433 static enum { /* Reasons for waking up */
1434 TP_ACPI_WAKEUP_NONE = 0, /* None or unknown */
1435 TP_ACPI_WAKEUP_BAYEJ, /* Bay ejection request */
1436 TP_ACPI_WAKEUP_UNDOCK, /* Undock request */
1437 } hotkey_wakeup_reason;
1438
1439 static int hotkey_autosleep_ack;
1440
1441 static u32 hotkey_orig_mask;
1442 static u32 hotkey_all_mask;
1443 static u32 hotkey_reserved_mask;
1444 static u32 hotkey_mask;
1445
1446 static unsigned int hotkey_report_mode;
1447
1448 static u16 *hotkey_keycode_map;
1449
1450 static struct attribute_set *hotkey_dev_attributes;
1451
1452 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1453 #define HOTKEY_CONFIG_CRITICAL_START \
1454 do { \
1455 mutex_lock(&hotkey_thread_data_mutex); \
1456 hotkey_config_change++; \
1457 } while (0);
1458 #define HOTKEY_CONFIG_CRITICAL_END \
1459 mutex_unlock(&hotkey_thread_data_mutex);
1460 #else
1461 #define HOTKEY_CONFIG_CRITICAL_START
1462 #define HOTKEY_CONFIG_CRITICAL_END
1463 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1464
1465 /* HKEY.MHKG() return bits */
1466 #define TP_HOTKEY_TABLET_MASK (1 << 3)
1467
1468 static int hotkey_get_wlsw(int *status)
1469 {
1470 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
1471 if (dbg_wlswemul) {
1472 *status = !!tpacpi_wlsw_emulstate;
1473 return 0;
1474 }
1475 #endif
1476 if (!acpi_evalf(hkey_handle, status, "WLSW", "d"))
1477 return -EIO;
1478 return 0;
1479 }
1480
1481 static int hotkey_get_tablet_mode(int *status)
1482 {
1483 int s;
1484
1485 if (!acpi_evalf(hkey_handle, &s, "MHKG", "d"))
1486 return -EIO;
1487
1488 *status = ((s & TP_HOTKEY_TABLET_MASK) != 0);
1489 return 0;
1490 }
1491
1492 /*
1493 * Call with hotkey_mutex held
1494 */
1495 static int hotkey_mask_get(void)
1496 {
1497 u32 m = 0;
1498
1499 if (tp_features.hotkey_mask) {
1500 if (!acpi_evalf(hkey_handle, &m, "DHKN", "d"))
1501 return -EIO;
1502 }
1503 hotkey_mask = m | (hotkey_source_mask & hotkey_mask);
1504
1505 return 0;
1506 }
1507
1508 /*
1509 * Call with hotkey_mutex held
1510 */
1511 static int hotkey_mask_set(u32 mask)
1512 {
1513 int i;
1514 int rc = 0;
1515
1516 if (tp_features.hotkey_mask) {
1517 if (!tp_warned.hotkey_mask_ff &&
1518 (mask == 0xffff || mask == 0xffffff ||
1519 mask == 0xffffffff)) {
1520 tp_warned.hotkey_mask_ff = 1;
1521 printk(TPACPI_NOTICE
1522 "setting the hotkey mask to 0x%08x is likely "
1523 "not the best way to go about it\n", mask);
1524 printk(TPACPI_NOTICE
1525 "please consider using the driver defaults, "
1526 "and refer to up-to-date thinkpad-acpi "
1527 "documentation\n");
1528 }
1529
1530 HOTKEY_CONFIG_CRITICAL_START
1531 for (i = 0; i < 32; i++) {
1532 u32 m = 1 << i;
1533 /* enable in firmware mask only keys not in NVRAM
1534 * mode, but enable the key in the cached hotkey_mask
1535 * regardless of mode, or the key will end up
1536 * disabled by hotkey_mask_get() */
1537 if (!acpi_evalf(hkey_handle,
1538 NULL, "MHKM", "vdd", i + 1,
1539 !!((mask & ~hotkey_source_mask) & m))) {
1540 rc = -EIO;
1541 break;
1542 } else {
1543 hotkey_mask = (hotkey_mask & ~m) | (mask & m);
1544 }
1545 }
1546 HOTKEY_CONFIG_CRITICAL_END
1547
1548 /* hotkey_mask_get must be called unconditionally below */
1549 if (!hotkey_mask_get() && !rc &&
1550 (hotkey_mask & ~hotkey_source_mask) !=
1551 (mask & ~hotkey_source_mask)) {
1552 printk(TPACPI_NOTICE
1553 "requested hot key mask 0x%08x, but "
1554 "firmware forced it to 0x%08x\n",
1555 mask, hotkey_mask);
1556 }
1557 } else {
1558 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1559 HOTKEY_CONFIG_CRITICAL_START
1560 hotkey_mask = mask & hotkey_source_mask;
1561 HOTKEY_CONFIG_CRITICAL_END
1562 hotkey_mask_get();
1563 if (hotkey_mask != mask) {
1564 printk(TPACPI_NOTICE
1565 "requested hot key mask 0x%08x, "
1566 "forced to 0x%08x (NVRAM poll mask is "
1567 "0x%08x): no firmware mask support\n",
1568 mask, hotkey_mask, hotkey_source_mask);
1569 }
1570 #else
1571 hotkey_mask_get();
1572 rc = -ENXIO;
1573 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1574 }
1575
1576 return rc;
1577 }
1578
1579 static int hotkey_status_get(int *status)
1580 {
1581 if (!acpi_evalf(hkey_handle, status, "DHKC", "d"))
1582 return -EIO;
1583
1584 return 0;
1585 }
1586
1587 static int hotkey_status_set(bool enable)
1588 {
1589 if (!acpi_evalf(hkey_handle, NULL, "MHKC", "vd", enable ? 1 : 0))
1590 return -EIO;
1591
1592 return 0;
1593 }
1594
1595 static void tpacpi_input_send_tabletsw(void)
1596 {
1597 int state;
1598
1599 if (tp_features.hotkey_tablet &&
1600 !hotkey_get_tablet_mode(&state)) {
1601 mutex_lock(&tpacpi_inputdev_send_mutex);
1602
1603 input_report_switch(tpacpi_inputdev,
1604 SW_TABLET_MODE, !!state);
1605 input_sync(tpacpi_inputdev);
1606
1607 mutex_unlock(&tpacpi_inputdev_send_mutex);
1608 }
1609 }
1610
1611 static void tpacpi_input_send_key(unsigned int scancode)
1612 {
1613 unsigned int keycode;
1614
1615 keycode = hotkey_keycode_map[scancode];
1616
1617 if (keycode != KEY_RESERVED) {
1618 mutex_lock(&tpacpi_inputdev_send_mutex);
1619
1620 input_report_key(tpacpi_inputdev, keycode, 1);
1621 if (keycode == KEY_UNKNOWN)
1622 input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN,
1623 scancode);
1624 input_sync(tpacpi_inputdev);
1625
1626 input_report_key(tpacpi_inputdev, keycode, 0);
1627 if (keycode == KEY_UNKNOWN)
1628 input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN,
1629 scancode);
1630 input_sync(tpacpi_inputdev);
1631
1632 mutex_unlock(&tpacpi_inputdev_send_mutex);
1633 }
1634 }
1635
1636 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1637 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver;
1638
1639 static void tpacpi_hotkey_send_key(unsigned int scancode)
1640 {
1641 tpacpi_input_send_key(scancode);
1642 if (hotkey_report_mode < 2) {
1643 acpi_bus_generate_proc_event(ibm_hotkey_acpidriver.device,
1644 0x80, 0x1001 + scancode);
1645 }
1646 }
1647
1648 static void hotkey_read_nvram(struct tp_nvram_state *n, u32 m)
1649 {
1650 u8 d;
1651
1652 if (m & TP_NVRAM_HKEY_GROUP_HK2) {
1653 d = nvram_read_byte(TP_NVRAM_ADDR_HK2);
1654 n->thinkpad_toggle = !!(d & TP_NVRAM_MASK_HKT_THINKPAD);
1655 n->zoom_toggle = !!(d & TP_NVRAM_MASK_HKT_ZOOM);
1656 n->display_toggle = !!(d & TP_NVRAM_MASK_HKT_DISPLAY);
1657 n->hibernate_toggle = !!(d & TP_NVRAM_MASK_HKT_HIBERNATE);
1658 }
1659 if (m & TP_ACPI_HKEY_THNKLGHT_MASK) {
1660 d = nvram_read_byte(TP_NVRAM_ADDR_THINKLIGHT);
1661 n->thinklight_toggle = !!(d & TP_NVRAM_MASK_THINKLIGHT);
1662 }
1663 if (m & TP_ACPI_HKEY_DISPXPAND_MASK) {
1664 d = nvram_read_byte(TP_NVRAM_ADDR_VIDEO);
1665 n->displayexp_toggle =
1666 !!(d & TP_NVRAM_MASK_HKT_DISPEXPND);
1667 }
1668 if (m & TP_NVRAM_HKEY_GROUP_BRIGHTNESS) {
1669 d = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS);
1670 n->brightness_level = (d & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
1671 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
1672 n->brightness_toggle =
1673 !!(d & TP_NVRAM_MASK_HKT_BRIGHTNESS);
1674 }
1675 if (m & TP_NVRAM_HKEY_GROUP_VOLUME) {
1676 d = nvram_read_byte(TP_NVRAM_ADDR_MIXER);
1677 n->volume_level = (d & TP_NVRAM_MASK_LEVEL_VOLUME)
1678 >> TP_NVRAM_POS_LEVEL_VOLUME;
1679 n->mute = !!(d & TP_NVRAM_MASK_MUTE);
1680 n->volume_toggle = !!(d & TP_NVRAM_MASK_HKT_VOLUME);
1681 }
1682 }
1683
1684 #define TPACPI_COMPARE_KEY(__scancode, __member) \
1685 do { \
1686 if ((mask & (1 << __scancode)) && \
1687 oldn->__member != newn->__member) \
1688 tpacpi_hotkey_send_key(__scancode); \
1689 } while (0)
1690
1691 #define TPACPI_MAY_SEND_KEY(__scancode) \
1692 do { if (mask & (1 << __scancode)) \
1693 tpacpi_hotkey_send_key(__scancode); } while (0)
1694
1695 static void hotkey_compare_and_issue_event(struct tp_nvram_state *oldn,
1696 struct tp_nvram_state *newn,
1697 u32 mask)
1698 {
1699 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_THINKPAD, thinkpad_toggle);
1700 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNSPACE, zoom_toggle);
1701 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF7, display_toggle);
1702 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF12, hibernate_toggle);
1703
1704 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNPAGEUP, thinklight_toggle);
1705
1706 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF8, displayexp_toggle);
1707
1708 /* handle volume */
1709 if (oldn->volume_toggle != newn->volume_toggle) {
1710 if (oldn->mute != newn->mute) {
1711 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE);
1712 }
1713 if (oldn->volume_level > newn->volume_level) {
1714 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
1715 } else if (oldn->volume_level < newn->volume_level) {
1716 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
1717 } else if (oldn->mute == newn->mute) {
1718 /* repeated key presses that didn't change state */
1719 if (newn->mute) {
1720 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE);
1721 } else if (newn->volume_level != 0) {
1722 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
1723 } else {
1724 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
1725 }
1726 }
1727 }
1728
1729 /* handle brightness */
1730 if (oldn->brightness_toggle != newn->brightness_toggle) {
1731 if (oldn->brightness_level < newn->brightness_level) {
1732 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
1733 } else if (oldn->brightness_level > newn->brightness_level) {
1734 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
1735 } else {
1736 /* repeated key presses that didn't change state */
1737 if (newn->brightness_level != 0) {
1738 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
1739 } else {
1740 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
1741 }
1742 }
1743 }
1744 }
1745
1746 #undef TPACPI_COMPARE_KEY
1747 #undef TPACPI_MAY_SEND_KEY
1748
1749 static int hotkey_kthread(void *data)
1750 {
1751 struct tp_nvram_state s[2];
1752 u32 mask;
1753 unsigned int si, so;
1754 unsigned long t;
1755 unsigned int change_detector, must_reset;
1756
1757 mutex_lock(&hotkey_thread_mutex);
1758
1759 if (tpacpi_lifecycle == TPACPI_LIFE_EXITING)
1760 goto exit;
1761
1762 set_freezable();
1763
1764 so = 0;
1765 si = 1;
1766 t = 0;
1767
1768 /* Initial state for compares */
1769 mutex_lock(&hotkey_thread_data_mutex);
1770 change_detector = hotkey_config_change;
1771 mask = hotkey_source_mask & hotkey_mask;
1772 mutex_unlock(&hotkey_thread_data_mutex);
1773 hotkey_read_nvram(&s[so], mask);
1774
1775 while (!kthread_should_stop() && hotkey_poll_freq) {
1776 if (t == 0)
1777 t = 1000/hotkey_poll_freq;
1778 t = msleep_interruptible(t);
1779 if (unlikely(kthread_should_stop()))
1780 break;
1781 must_reset = try_to_freeze();
1782 if (t > 0 && !must_reset)
1783 continue;
1784
1785 mutex_lock(&hotkey_thread_data_mutex);
1786 if (must_reset || hotkey_config_change != change_detector) {
1787 /* forget old state on thaw or config change */
1788 si = so;
1789 t = 0;
1790 change_detector = hotkey_config_change;
1791 }
1792 mask = hotkey_source_mask & hotkey_mask;
1793 mutex_unlock(&hotkey_thread_data_mutex);
1794
1795 if (likely(mask)) {
1796 hotkey_read_nvram(&s[si], mask);
1797 if (likely(si != so)) {
1798 hotkey_compare_and_issue_event(&s[so], &s[si],
1799 mask);
1800 }
1801 }
1802
1803 so = si;
1804 si ^= 1;
1805 }
1806
1807 exit:
1808 mutex_unlock(&hotkey_thread_mutex);
1809 return 0;
1810 }
1811
1812 static void hotkey_poll_stop_sync(void)
1813 {
1814 if (tpacpi_hotkey_task) {
1815 if (frozen(tpacpi_hotkey_task) ||
1816 freezing(tpacpi_hotkey_task))
1817 thaw_process(tpacpi_hotkey_task);
1818
1819 kthread_stop(tpacpi_hotkey_task);
1820 tpacpi_hotkey_task = NULL;
1821 mutex_lock(&hotkey_thread_mutex);
1822 /* at this point, the thread did exit */
1823 mutex_unlock(&hotkey_thread_mutex);
1824 }
1825 }
1826
1827 /* call with hotkey_mutex held */
1828 static void hotkey_poll_setup(int may_warn)
1829 {
1830 if ((hotkey_source_mask & hotkey_mask) != 0 &&
1831 hotkey_poll_freq > 0 &&
1832 (tpacpi_inputdev->users > 0 || hotkey_report_mode < 2)) {
1833 if (!tpacpi_hotkey_task) {
1834 tpacpi_hotkey_task = kthread_run(hotkey_kthread,
1835 NULL, TPACPI_NVRAM_KTHREAD_NAME);
1836 if (IS_ERR(tpacpi_hotkey_task)) {
1837 tpacpi_hotkey_task = NULL;
1838 printk(TPACPI_ERR
1839 "could not create kernel thread "
1840 "for hotkey polling\n");
1841 }
1842 }
1843 } else {
1844 hotkey_poll_stop_sync();
1845 if (may_warn &&
1846 hotkey_source_mask != 0 && hotkey_poll_freq == 0) {
1847 printk(TPACPI_NOTICE
1848 "hot keys 0x%08x require polling, "
1849 "which is currently disabled\n",
1850 hotkey_source_mask);
1851 }
1852 }
1853 }
1854
1855 static void hotkey_poll_setup_safe(int may_warn)
1856 {
1857 mutex_lock(&hotkey_mutex);
1858 hotkey_poll_setup(may_warn);
1859 mutex_unlock(&hotkey_mutex);
1860 }
1861
1862 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1863
1864 static void hotkey_poll_setup_safe(int __unused)
1865 {
1866 }
1867
1868 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1869
1870 static int hotkey_inputdev_open(struct input_dev *dev)
1871 {
1872 switch (tpacpi_lifecycle) {
1873 case TPACPI_LIFE_INIT:
1874 /*
1875 * hotkey_init will call hotkey_poll_setup_safe
1876 * at the appropriate moment
1877 */
1878 return 0;
1879 case TPACPI_LIFE_EXITING:
1880 return -EBUSY;
1881 case TPACPI_LIFE_RUNNING:
1882 hotkey_poll_setup_safe(0);
1883 return 0;
1884 }
1885
1886 /* Should only happen if tpacpi_lifecycle is corrupt */
1887 BUG();
1888 return -EBUSY;
1889 }
1890
1891 static void hotkey_inputdev_close(struct input_dev *dev)
1892 {
1893 /* disable hotkey polling when possible */
1894 if (tpacpi_lifecycle == TPACPI_LIFE_RUNNING)
1895 hotkey_poll_setup_safe(0);
1896 }
1897
1898 /* sysfs hotkey enable ------------------------------------------------- */
1899 static ssize_t hotkey_enable_show(struct device *dev,
1900 struct device_attribute *attr,
1901 char *buf)
1902 {
1903 int res, status;
1904
1905 printk_deprecated_attribute("hotkey_enable",
1906 "Hotkey reporting is always enabled");
1907
1908 res = hotkey_status_get(&status);
1909 if (res)
1910 return res;
1911
1912 return snprintf(buf, PAGE_SIZE, "%d\n", status);
1913 }
1914
1915 static ssize_t hotkey_enable_store(struct device *dev,
1916 struct device_attribute *attr,
1917 const char *buf, size_t count)
1918 {
1919 unsigned long t;
1920
1921 printk_deprecated_attribute("hotkey_enable",
1922 "Hotkeys can be disabled through hotkey_mask");
1923
1924 if (parse_strtoul(buf, 1, &t))
1925 return -EINVAL;
1926
1927 if (t == 0)
1928 return -EPERM;
1929
1930 return count;
1931 }
1932
1933 static struct device_attribute dev_attr_hotkey_enable =
1934 __ATTR(hotkey_enable, S_IWUSR | S_IRUGO,
1935 hotkey_enable_show, hotkey_enable_store);
1936
1937 /* sysfs hotkey mask --------------------------------------------------- */
1938 static ssize_t hotkey_mask_show(struct device *dev,
1939 struct device_attribute *attr,
1940 char *buf)
1941 {
1942 int res;
1943
1944 if (mutex_lock_killable(&hotkey_mutex))
1945 return -ERESTARTSYS;
1946 res = hotkey_mask_get();
1947 mutex_unlock(&hotkey_mutex);
1948
1949 return (res)?
1950 res : snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_mask);
1951 }
1952
1953 static ssize_t hotkey_mask_store(struct device *dev,
1954 struct device_attribute *attr,
1955 const char *buf, size_t count)
1956 {
1957 unsigned long t;
1958 int res;
1959
1960 if (parse_strtoul(buf, 0xffffffffUL, &t))
1961 return -EINVAL;
1962
1963 if (mutex_lock_killable(&hotkey_mutex))
1964 return -ERESTARTSYS;
1965
1966 res = hotkey_mask_set(t);
1967
1968 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1969 hotkey_poll_setup(1);
1970 #endif
1971
1972 mutex_unlock(&hotkey_mutex);
1973
1974 tpacpi_disclose_usertask("hotkey_mask", "set to 0x%08lx\n", t);
1975
1976 return (res) ? res : count;
1977 }
1978
1979 static struct device_attribute dev_attr_hotkey_mask =
1980 __ATTR(hotkey_mask, S_IWUSR | S_IRUGO,
1981 hotkey_mask_show, hotkey_mask_store);
1982
1983 /* sysfs hotkey bios_enabled ------------------------------------------- */
1984 static ssize_t hotkey_bios_enabled_show(struct device *dev,
1985 struct device_attribute *attr,
1986 char *buf)
1987 {
1988 return sprintf(buf, "0\n");
1989 }
1990
1991 static struct device_attribute dev_attr_hotkey_bios_enabled =
1992 __ATTR(hotkey_bios_enabled, S_IRUGO, hotkey_bios_enabled_show, NULL);
1993
1994 /* sysfs hotkey bios_mask ---------------------------------------------- */
1995 static ssize_t hotkey_bios_mask_show(struct device *dev,
1996 struct device_attribute *attr,
1997 char *buf)
1998 {
1999 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_orig_mask);
2000 }
2001
2002 static struct device_attribute dev_attr_hotkey_bios_mask =
2003 __ATTR(hotkey_bios_mask, S_IRUGO, hotkey_bios_mask_show, NULL);
2004
2005 /* sysfs hotkey all_mask ----------------------------------------------- */
2006 static ssize_t hotkey_all_mask_show(struct device *dev,
2007 struct device_attribute *attr,
2008 char *buf)
2009 {
2010 return snprintf(buf, PAGE_SIZE, "0x%08x\n",
2011 hotkey_all_mask | hotkey_source_mask);
2012 }
2013
2014 static struct device_attribute dev_attr_hotkey_all_mask =
2015 __ATTR(hotkey_all_mask, S_IRUGO, hotkey_all_mask_show, NULL);
2016
2017 /* sysfs hotkey recommended_mask --------------------------------------- */
2018 static ssize_t hotkey_recommended_mask_show(struct device *dev,
2019 struct device_attribute *attr,
2020 char *buf)
2021 {
2022 return snprintf(buf, PAGE_SIZE, "0x%08x\n",
2023 (hotkey_all_mask | hotkey_source_mask)
2024 & ~hotkey_reserved_mask);
2025 }
2026
2027 static struct device_attribute dev_attr_hotkey_recommended_mask =
2028 __ATTR(hotkey_recommended_mask, S_IRUGO,
2029 hotkey_recommended_mask_show, NULL);
2030
2031 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2032
2033 /* sysfs hotkey hotkey_source_mask ------------------------------------- */
2034 static ssize_t hotkey_source_mask_show(struct device *dev,
2035 struct device_attribute *attr,
2036 char *buf)
2037 {
2038 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_source_mask);
2039 }
2040
2041 static ssize_t hotkey_source_mask_store(struct device *dev,
2042 struct device_attribute *attr,
2043 const char *buf, size_t count)
2044 {
2045 unsigned long t;
2046
2047 if (parse_strtoul(buf, 0xffffffffUL, &t) ||
2048 ((t & ~TPACPI_HKEY_NVRAM_KNOWN_MASK) != 0))
2049 return -EINVAL;
2050
2051 if (mutex_lock_killable(&hotkey_mutex))
2052 return -ERESTARTSYS;
2053
2054 HOTKEY_CONFIG_CRITICAL_START
2055 hotkey_source_mask = t;
2056 HOTKEY_CONFIG_CRITICAL_END
2057
2058 hotkey_poll_setup(1);
2059
2060 mutex_unlock(&hotkey_mutex);
2061
2062 tpacpi_disclose_usertask("hotkey_source_mask", "set to 0x%08lx\n", t);
2063
2064 return count;
2065 }
2066
2067 static struct device_attribute dev_attr_hotkey_source_mask =
2068 __ATTR(hotkey_source_mask, S_IWUSR | S_IRUGO,
2069 hotkey_source_mask_show, hotkey_source_mask_store);
2070
2071 /* sysfs hotkey hotkey_poll_freq --------------------------------------- */
2072 static ssize_t hotkey_poll_freq_show(struct device *dev,
2073 struct device_attribute *attr,
2074 char *buf)
2075 {
2076 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_poll_freq);
2077 }
2078
2079 static ssize_t hotkey_poll_freq_store(struct device *dev,
2080 struct device_attribute *attr,
2081 const char *buf, size_t count)
2082 {
2083 unsigned long t;
2084
2085 if (parse_strtoul(buf, 25, &t))
2086 return -EINVAL;
2087
2088 if (mutex_lock_killable(&hotkey_mutex))
2089 return -ERESTARTSYS;
2090
2091 hotkey_poll_freq = t;
2092
2093 hotkey_poll_setup(1);
2094 mutex_unlock(&hotkey_mutex);
2095
2096 tpacpi_disclose_usertask("hotkey_poll_freq", "set to %lu\n", t);
2097
2098 return count;
2099 }
2100
2101 static struct device_attribute dev_attr_hotkey_poll_freq =
2102 __ATTR(hotkey_poll_freq, S_IWUSR | S_IRUGO,
2103 hotkey_poll_freq_show, hotkey_poll_freq_store);
2104
2105 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2106
2107 /* sysfs hotkey radio_sw (pollable) ------------------------------------ */
2108 static ssize_t hotkey_radio_sw_show(struct device *dev,
2109 struct device_attribute *attr,
2110 char *buf)
2111 {
2112 int res, s;
2113 res = hotkey_get_wlsw(&s);
2114 if (res < 0)
2115 return res;
2116
2117 return snprintf(buf, PAGE_SIZE, "%d\n", !!s);
2118 }
2119
2120 static struct device_attribute dev_attr_hotkey_radio_sw =
2121 __ATTR(hotkey_radio_sw, S_IRUGO, hotkey_radio_sw_show, NULL);
2122
2123 static void hotkey_radio_sw_notify_change(void)
2124 {
2125 if (tp_features.hotkey_wlsw)
2126 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2127 "hotkey_radio_sw");
2128 }
2129
2130 /* sysfs hotkey tablet mode (pollable) --------------------------------- */
2131 static ssize_t hotkey_tablet_mode_show(struct device *dev,
2132 struct device_attribute *attr,
2133 char *buf)
2134 {
2135 int res, s;
2136 res = hotkey_get_tablet_mode(&s);
2137 if (res < 0)
2138 return res;
2139
2140 return snprintf(buf, PAGE_SIZE, "%d\n", !!s);
2141 }
2142
2143 static struct device_attribute dev_attr_hotkey_tablet_mode =
2144 __ATTR(hotkey_tablet_mode, S_IRUGO, hotkey_tablet_mode_show, NULL);
2145
2146 static void hotkey_tablet_mode_notify_change(void)
2147 {
2148 if (tp_features.hotkey_tablet)
2149 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2150 "hotkey_tablet_mode");
2151 }
2152
2153 /* sysfs hotkey report_mode -------------------------------------------- */
2154 static ssize_t hotkey_report_mode_show(struct device *dev,
2155 struct device_attribute *attr,
2156 char *buf)
2157 {
2158 return snprintf(buf, PAGE_SIZE, "%d\n",
2159 (hotkey_report_mode != 0) ? hotkey_report_mode : 1);
2160 }
2161
2162 static struct device_attribute dev_attr_hotkey_report_mode =
2163 __ATTR(hotkey_report_mode, S_IRUGO, hotkey_report_mode_show, NULL);
2164
2165 /* sysfs wakeup reason (pollable) -------------------------------------- */
2166 static ssize_t hotkey_wakeup_reason_show(struct device *dev,
2167 struct device_attribute *attr,
2168 char *buf)
2169 {
2170 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_wakeup_reason);
2171 }
2172
2173 static struct device_attribute dev_attr_hotkey_wakeup_reason =
2174 __ATTR(wakeup_reason, S_IRUGO, hotkey_wakeup_reason_show, NULL);
2175
2176 static void hotkey_wakeup_reason_notify_change(void)
2177 {
2178 if (tp_features.hotkey_mask)
2179 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2180 "wakeup_reason");
2181 }
2182
2183 /* sysfs wakeup hotunplug_complete (pollable) -------------------------- */
2184 static ssize_t hotkey_wakeup_hotunplug_complete_show(struct device *dev,
2185 struct device_attribute *attr,
2186 char *buf)
2187 {
2188 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_autosleep_ack);
2189 }
2190
2191 static struct device_attribute dev_attr_hotkey_wakeup_hotunplug_complete =
2192 __ATTR(wakeup_hotunplug_complete, S_IRUGO,
2193 hotkey_wakeup_hotunplug_complete_show, NULL);
2194
2195 static void hotkey_wakeup_hotunplug_complete_notify_change(void)
2196 {
2197 if (tp_features.hotkey_mask)
2198 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2199 "wakeup_hotunplug_complete");
2200 }
2201
2202 /* --------------------------------------------------------------------- */
2203
2204 static struct attribute *hotkey_attributes[] __initdata = {
2205 &dev_attr_hotkey_enable.attr,
2206 &dev_attr_hotkey_bios_enabled.attr,
2207 &dev_attr_hotkey_report_mode.attr,
2208 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2209 &dev_attr_hotkey_mask.attr,
2210 &dev_attr_hotkey_all_mask.attr,
2211 &dev_attr_hotkey_recommended_mask.attr,
2212 &dev_attr_hotkey_source_mask.attr,
2213 &dev_attr_hotkey_poll_freq.attr,
2214 #endif
2215 };
2216
2217 static struct attribute *hotkey_mask_attributes[] __initdata = {
2218 &dev_attr_hotkey_bios_mask.attr,
2219 #ifndef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2220 &dev_attr_hotkey_mask.attr,
2221 &dev_attr_hotkey_all_mask.attr,
2222 &dev_attr_hotkey_recommended_mask.attr,
2223 #endif
2224 &dev_attr_hotkey_wakeup_reason.attr,
2225 &dev_attr_hotkey_wakeup_hotunplug_complete.attr,
2226 };
2227
2228 static void bluetooth_update_rfk(void);
2229 static void wan_update_rfk(void);
2230 static void uwb_update_rfk(void);
2231 static void tpacpi_send_radiosw_update(void)
2232 {
2233 int wlsw;
2234
2235 /* Sync these BEFORE sending any rfkill events */
2236 if (tp_features.bluetooth)
2237 bluetooth_update_rfk();
2238 if (tp_features.wan)
2239 wan_update_rfk();
2240 if (tp_features.uwb)
2241 uwb_update_rfk();
2242
2243 if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&wlsw)) {
2244 mutex_lock(&tpacpi_inputdev_send_mutex);
2245
2246 input_report_switch(tpacpi_inputdev,
2247 SW_RFKILL_ALL, !!wlsw);
2248 input_sync(tpacpi_inputdev);
2249
2250 mutex_unlock(&tpacpi_inputdev_send_mutex);
2251 }
2252 hotkey_radio_sw_notify_change();
2253 }
2254
2255 static void hotkey_exit(void)
2256 {
2257 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2258 hotkey_poll_stop_sync();
2259 #endif
2260
2261 if (hotkey_dev_attributes)
2262 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
2263
2264 kfree(hotkey_keycode_map);
2265
2266 if (tp_features.hotkey) {
2267 dbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_HKEY,
2268 "restoring original hot key mask\n");
2269 /* no short-circuit boolean operator below! */
2270 if ((hotkey_mask_set(hotkey_orig_mask) |
2271 hotkey_status_set(false)) != 0)
2272 printk(TPACPI_ERR
2273 "failed to restore hot key mask "
2274 "to BIOS defaults\n");
2275 }
2276 }
2277
2278 static int __init hotkey_init(struct ibm_init_struct *iibm)
2279 {
2280 /* Requirements for changing the default keymaps:
2281 *
2282 * 1. Many of the keys are mapped to KEY_RESERVED for very
2283 * good reasons. Do not change them unless you have deep
2284 * knowledge on the IBM and Lenovo ThinkPad firmware for
2285 * the various ThinkPad models. The driver behaves
2286 * differently for KEY_RESERVED: such keys have their
2287 * hot key mask *unset* in mask_recommended, and also
2288 * in the initial hot key mask programmed into the
2289 * firmware at driver load time, which means the firm-
2290 * ware may react very differently if you change them to
2291 * something else;
2292 *
2293 * 2. You must be subscribed to the linux-thinkpad and
2294 * ibm-acpi-devel mailing lists, and you should read the
2295 * list archives since 2007 if you want to change the
2296 * keymaps. This requirement exists so that you will
2297 * know the past history of problems with the thinkpad-
2298 * acpi driver keymaps, and also that you will be
2299 * listening to any bug reports;
2300 *
2301 * 3. Do not send thinkpad-acpi specific patches directly to
2302 * for merging, *ever*. Send them to the linux-acpi
2303 * mailinglist for comments. Merging is to be done only
2304 * through acpi-test and the ACPI maintainer.
2305 *
2306 * If the above is too much to ask, don't change the keymap.
2307 * Ask the thinkpad-acpi maintainer to do it, instead.
2308 */
2309 static u16 ibm_keycode_map[] __initdata = {
2310 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
2311 KEY_FN_F1, KEY_FN_F2, KEY_COFFEE, KEY_SLEEP,
2312 KEY_WLAN, KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
2313 KEY_FN_F9, KEY_FN_F10, KEY_FN_F11, KEY_SUSPEND,
2314
2315 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
2316 KEY_UNKNOWN, /* 0x0C: FN+BACKSPACE */
2317 KEY_UNKNOWN, /* 0x0D: FN+INSERT */
2318 KEY_UNKNOWN, /* 0x0E: FN+DELETE */
2319
2320 /* brightness: firmware always reacts to them, unless
2321 * X.org did some tricks in the radeon BIOS scratch
2322 * registers of *some* models */
2323 KEY_RESERVED, /* 0x0F: FN+HOME (brightness up) */
2324 KEY_RESERVED, /* 0x10: FN+END (brightness down) */
2325
2326 /* Thinklight: firmware always react to it */
2327 KEY_RESERVED, /* 0x11: FN+PGUP (thinklight toggle) */
2328
2329 KEY_UNKNOWN, /* 0x12: FN+PGDOWN */
2330 KEY_ZOOM, /* 0x13: FN+SPACE (zoom) */
2331
2332 /* Volume: firmware always react to it and reprograms
2333 * the built-in *extra* mixer. Never map it to control
2334 * another mixer by default. */
2335 KEY_RESERVED, /* 0x14: VOLUME UP */
2336 KEY_RESERVED, /* 0x15: VOLUME DOWN */
2337 KEY_RESERVED, /* 0x16: MUTE */
2338
2339 KEY_VENDOR, /* 0x17: Thinkpad/AccessIBM/Lenovo */
2340
2341 /* (assignments unknown, please report if found) */
2342 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
2343 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
2344 };
2345 static u16 lenovo_keycode_map[] __initdata = {
2346 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
2347 KEY_FN_F1, KEY_COFFEE, KEY_BATTERY, KEY_SLEEP,
2348 KEY_WLAN, KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
2349 KEY_FN_F9, KEY_FN_F10, KEY_FN_F11, KEY_SUSPEND,
2350
2351 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
2352 KEY_UNKNOWN, /* 0x0C: FN+BACKSPACE */
2353 KEY_UNKNOWN, /* 0x0D: FN+INSERT */
2354 KEY_UNKNOWN, /* 0x0E: FN+DELETE */
2355
2356 /* These either have to go through ACPI video, or
2357 * act like in the IBM ThinkPads, so don't ever
2358 * enable them by default */
2359 KEY_RESERVED, /* 0x0F: FN+HOME (brightness up) */
2360 KEY_RESERVED, /* 0x10: FN+END (brightness down) */
2361
2362 KEY_RESERVED, /* 0x11: FN+PGUP (thinklight toggle) */
2363
2364 KEY_UNKNOWN, /* 0x12: FN+PGDOWN */
2365 KEY_ZOOM, /* 0x13: FN+SPACE (zoom) */
2366
2367 /* Volume: z60/z61, T60 (BIOS version?): firmware always
2368 * react to it and reprograms the built-in *extra* mixer.
2369 * Never map it to control another mixer by default.
2370 *
2371 * T60?, T61, R60?, R61: firmware and EC tries to send
2372 * these over the regular keyboard, so these are no-ops,
2373 * but there are still weird bugs re. MUTE, so do not
2374 * change unless you get test reports from all Lenovo
2375 * models. May cause the BIOS to interfere with the
2376 * HDA mixer.
2377 */
2378 KEY_RESERVED, /* 0x14: VOLUME UP */
2379 KEY_RESERVED, /* 0x15: VOLUME DOWN */
2380 KEY_RESERVED, /* 0x16: MUTE */
2381
2382 KEY_VENDOR, /* 0x17: Thinkpad/AccessIBM/Lenovo */
2383
2384 /* (assignments unknown, please report if found) */
2385 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
2386 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
2387 };
2388
2389 #define TPACPI_HOTKEY_MAP_LEN ARRAY_SIZE(ibm_keycode_map)
2390 #define TPACPI_HOTKEY_MAP_SIZE sizeof(ibm_keycode_map)
2391 #define TPACPI_HOTKEY_MAP_TYPESIZE sizeof(ibm_keycode_map[0])
2392
2393 int res, i;
2394 int status;
2395 int hkeyv;
2396
2397 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
2398 "initializing hotkey subdriver\n");
2399
2400 BUG_ON(!tpacpi_inputdev);
2401 BUG_ON(tpacpi_inputdev->open != NULL ||
2402 tpacpi_inputdev->close != NULL);
2403
2404 TPACPI_ACPIHANDLE_INIT(hkey);
2405 mutex_init(&hotkey_mutex);
2406
2407 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2408 mutex_init(&hotkey_thread_mutex);
2409 mutex_init(&hotkey_thread_data_mutex);
2410 #endif
2411
2412 /* hotkey not supported on 570 */
2413 tp_features.hotkey = hkey_handle != NULL;
2414
2415 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
2416 "hotkeys are %s\n",
2417 str_supported(tp_features.hotkey));
2418
2419 if (!tp_features.hotkey)
2420 return 1;
2421
2422 tpacpi_disable_brightness_delay();
2423
2424 hotkey_dev_attributes = create_attr_set(13, NULL);
2425 if (!hotkey_dev_attributes)
2426 return -ENOMEM;
2427 res = add_many_to_attr_set(hotkey_dev_attributes,
2428 hotkey_attributes,
2429 ARRAY_SIZE(hotkey_attributes));
2430 if (res)
2431 goto err_exit;
2432
2433 /* mask not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
2434 A30, R30, R31, T20-22, X20-21, X22-24. Detected by checking
2435 for HKEY interface version 0x100 */
2436 if (acpi_evalf(hkey_handle, &hkeyv, "MHKV", "qd")) {
2437 if ((hkeyv >> 8) != 1) {
2438 printk(TPACPI_ERR "unknown version of the "
2439 "HKEY interface: 0x%x\n", hkeyv);
2440 printk(TPACPI_ERR "please report this to %s\n",
2441 TPACPI_MAIL);
2442 } else {
2443 /*
2444 * MHKV 0x100 in A31, R40, R40e,
2445 * T4x, X31, and later
2446 */
2447 tp_features.hotkey_mask = 1;
2448 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
2449 "firmware HKEY interface version: 0x%x\n",
2450 hkeyv);
2451 }
2452 }
2453
2454 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
2455 "hotkey masks are %s\n",
2456 str_supported(tp_features.hotkey_mask));
2457
2458 if (tp_features.hotkey_mask) {
2459 if (!acpi_evalf(hkey_handle, &hotkey_all_mask,
2460 "MHKA", "qd")) {
2461 printk(TPACPI_ERR
2462 "missing MHKA handler, "
2463 "please report this to %s\n",
2464 TPACPI_MAIL);
2465 /* FN+F12, FN+F4, FN+F3 */
2466 hotkey_all_mask = 0x080cU;
2467 }
2468 }
2469
2470 /* hotkey_source_mask *must* be zero for
2471 * the first hotkey_mask_get */
2472 if (tp_features.hotkey_mask) {
2473 res = hotkey_mask_get();
2474 if (res)
2475 goto err_exit;
2476
2477 hotkey_orig_mask = hotkey_mask;
2478 res = add_many_to_attr_set(
2479 hotkey_dev_attributes,
2480 hotkey_mask_attributes,
2481 ARRAY_SIZE(hotkey_mask_attributes));
2482 if (res)
2483 goto err_exit;
2484 }
2485
2486 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2487 if (tp_features.hotkey_mask) {
2488 hotkey_source_mask = TPACPI_HKEY_NVRAM_GOOD_MASK
2489 & ~hotkey_all_mask;
2490 } else {
2491 hotkey_source_mask = TPACPI_HKEY_NVRAM_GOOD_MASK;
2492 }
2493
2494 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
2495 "hotkey source mask 0x%08x, polling freq %d\n",
2496 hotkey_source_mask, hotkey_poll_freq);
2497 #endif
2498
2499 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
2500 if (dbg_wlswemul) {
2501 tp_features.hotkey_wlsw = 1;
2502 printk(TPACPI_INFO
2503 "radio switch emulation enabled\n");
2504 } else
2505 #endif
2506 /* Not all thinkpads have a hardware radio switch */
2507 if (acpi_evalf(hkey_handle, &status, "WLSW", "qd")) {
2508 tp_features.hotkey_wlsw = 1;
2509 printk(TPACPI_INFO
2510 "radio switch found; radios are %s\n",
2511 enabled(status, 0));
2512 }
2513 if (tp_features.hotkey_wlsw)
2514 res = add_to_attr_set(hotkey_dev_attributes,
2515 &dev_attr_hotkey_radio_sw.attr);
2516
2517 /* For X41t, X60t, X61t Tablets... */
2518 if (!res && acpi_evalf(hkey_handle, &status, "MHKG", "qd")) {
2519 tp_features.hotkey_tablet = 1;
2520 printk(TPACPI_INFO
2521 "possible tablet mode switch found; "
2522 "ThinkPad in %s mode\n",
2523 (status & TP_HOTKEY_TABLET_MASK)?
2524 "tablet" : "laptop");
2525 res = add_to_attr_set(hotkey_dev_attributes,
2526 &dev_attr_hotkey_tablet_mode.attr);
2527 }
2528
2529 if (!res)
2530 res = register_attr_set_with_sysfs(
2531 hotkey_dev_attributes,
2532 &tpacpi_pdev->dev.kobj);
2533 if (res)
2534 goto err_exit;
2535
2536 /* Set up key map */
2537
2538 hotkey_keycode_map = kmalloc(TPACPI_HOTKEY_MAP_SIZE,
2539 GFP_KERNEL);
2540 if (!hotkey_keycode_map) {
2541 printk(TPACPI_ERR
2542 "failed to allocate memory for key map\n");
2543 res = -ENOMEM;
2544 goto err_exit;
2545 }
2546
2547 if (thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO) {
2548 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
2549 "using Lenovo default hot key map\n");
2550 memcpy(hotkey_keycode_map, &lenovo_keycode_map,
2551 TPACPI_HOTKEY_MAP_SIZE);
2552 } else {
2553 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
2554 "using IBM default hot key map\n");
2555 memcpy(hotkey_keycode_map, &ibm_keycode_map,
2556 TPACPI_HOTKEY_MAP_SIZE);
2557 }
2558
2559 set_bit(EV_KEY, tpacpi_inputdev->evbit);
2560 set_bit(EV_MSC, tpacpi_inputdev->evbit);
2561 set_bit(MSC_SCAN, tpacpi_inputdev->mscbit);
2562 tpacpi_inputdev->keycodesize = TPACPI_HOTKEY_MAP_TYPESIZE;
2563 tpacpi_inputdev->keycodemax = TPACPI_HOTKEY_MAP_LEN;
2564 tpacpi_inputdev->keycode = hotkey_keycode_map;
2565 for (i = 0; i < TPACPI_HOTKEY_MAP_LEN; i++) {
2566 if (hotkey_keycode_map[i] != KEY_RESERVED) {
2567 set_bit(hotkey_keycode_map[i],
2568 tpacpi_inputdev->keybit);
2569 } else {
2570 if (i < sizeof(hotkey_reserved_mask)*8)
2571 hotkey_reserved_mask |= 1 << i;
2572 }
2573 }
2574
2575 if (tp_features.hotkey_wlsw) {
2576 set_bit(EV_SW, tpacpi_inputdev->evbit);
2577 set_bit(SW_RFKILL_ALL, tpacpi_inputdev->swbit);
2578 }
2579 if (tp_features.hotkey_tablet) {
2580 set_bit(EV_SW, tpacpi_inputdev->evbit);
2581 set_bit(SW_TABLET_MODE, tpacpi_inputdev->swbit);
2582 }
2583
2584 /* Do not issue duplicate brightness change events to
2585 * userspace */
2586 if (!tp_features.bright_acpimode)
2587 /* update bright_acpimode... */
2588 tpacpi_check_std_acpi_brightness_support();
2589
2590 if (tp_features.bright_acpimode) {
2591 printk(TPACPI_INFO
2592 "This ThinkPad has standard ACPI backlight "
2593 "brightness control, supported by the ACPI "
2594 "video driver\n");
2595 printk(TPACPI_NOTICE
2596 "Disabling thinkpad-acpi brightness events "
2597 "by default...\n");
2598
2599 /* The hotkey_reserved_mask change below is not
2600 * necessary while the keys are at KEY_RESERVED in the
2601 * default map, but better safe than sorry, leave it
2602 * here as a marker of what we have to do, especially
2603 * when we finally become able to set this at runtime
2604 * on response to X.org requests */
2605 hotkey_reserved_mask |=
2606 (1 << TP_ACPI_HOTKEYSCAN_FNHOME)
2607 | (1 << TP_ACPI_HOTKEYSCAN_FNEND);
2608 }
2609
2610 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
2611 "enabling firmware HKEY event interface...\n");
2612 res = hotkey_status_set(true);
2613 if (res) {
2614 hotkey_exit();
2615 return res;
2616 }
2617 res = hotkey_mask_set(((hotkey_all_mask | hotkey_source_mask)
2618 & ~hotkey_reserved_mask)
2619 | hotkey_orig_mask);
2620 if (res < 0 && res != -ENXIO) {
2621 hotkey_exit();
2622 return res;
2623 }
2624
2625 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
2626 "legacy ibm/hotkey event reporting over procfs %s\n",
2627 (hotkey_report_mode < 2) ?
2628 "enabled" : "disabled");
2629
2630 tpacpi_inputdev->open = &hotkey_inputdev_open;
2631 tpacpi_inputdev->close = &hotkey_inputdev_close;
2632
2633 hotkey_poll_setup_safe(1);
2634 tpacpi_send_radiosw_update();
2635 tpacpi_input_send_tabletsw();
2636
2637 return 0;
2638
2639 err_exit:
2640 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
2641 hotkey_dev_attributes = NULL;
2642
2643 return (res < 0)? res : 1;
2644 }
2645
2646 static bool hotkey_notify_hotkey(const u32 hkey,
2647 bool *send_acpi_ev,
2648 bool *ignore_acpi_ev)
2649 {
2650 /* 0x1000-0x1FFF: key presses */
2651 unsigned int scancode = hkey & 0xfff;
2652 *send_acpi_ev = true;
2653 *ignore_acpi_ev = false;
2654
2655 if (scancode > 0 && scancode < 0x21) {
2656 scancode--;
2657 if (!(hotkey_source_mask & (1 << scancode))) {
2658 tpacpi_input_send_key(scancode);
2659 *send_acpi_ev = false;
2660 } else {
2661 *ignore_acpi_ev = true;
2662 }
2663 return true;
2664 }
2665 return false;
2666 }
2667
2668 static bool hotkey_notify_wakeup(const u32 hkey,
2669 bool *send_acpi_ev,
2670 bool *ignore_acpi_ev)
2671 {
2672 /* 0x2000-0x2FFF: Wakeup reason */
2673 *send_acpi_ev = true;
2674 *ignore_acpi_ev = false;
2675
2676 switch (hkey) {
2677 case 0x2304: /* suspend, undock */
2678 case 0x2404: /* hibernation, undock */
2679 hotkey_wakeup_reason = TP_ACPI_WAKEUP_UNDOCK;
2680 *ignore_acpi_ev = true;
2681 break;
2682
2683 case 0x2305: /* suspend, bay eject */
2684 case 0x2405: /* hibernation, bay eject */
2685 hotkey_wakeup_reason = TP_ACPI_WAKEUP_BAYEJ;
2686 *ignore_acpi_ev = true;
2687 break;
2688
2689 case 0x2313: /* Battery on critical low level (S3) */
2690 case 0x2413: /* Battery on critical low level (S4) */
2691 printk(TPACPI_ALERT
2692 "EMERGENCY WAKEUP: battery almost empty\n");
2693 /* how to auto-heal: */
2694 /* 2313: woke up from S3, go to S4/S5 */
2695 /* 2413: woke up from S4, go to S5 */
2696 break;
2697
2698 default:
2699 return false;
2700 }
2701
2702 if (hotkey_wakeup_reason != TP_ACPI_WAKEUP_NONE) {
2703 printk(TPACPI_INFO
2704 "woke up due to a hot-unplug "
2705 "request...\n");
2706 hotkey_wakeup_reason_notify_change();
2707 }
2708 return true;
2709 }
2710
2711 static bool hotkey_notify_usrevent(const u32 hkey,
2712 bool *send_acpi_ev,
2713 bool *ignore_acpi_ev)
2714 {
2715 /* 0x5000-0x5FFF: human interface helpers */
2716 *send_acpi_ev = true;
2717 *ignore_acpi_ev = false;
2718
2719 switch (hkey) {
2720 case 0x5010: /* Lenovo new BIOS: brightness changed */
2721 case 0x500b: /* X61t: tablet pen inserted into bay */
2722 case 0x500c: /* X61t: tablet pen removed from bay */
2723 return true;
2724
2725 case 0x5009: /* X41t-X61t: swivel up (tablet mode) */
2726 case 0x500a: /* X41t-X61t: swivel down (normal mode) */
2727 tpacpi_input_send_tabletsw();
2728 hotkey_tablet_mode_notify_change();
2729 *send_acpi_ev = false;
2730 return true;
2731
2732 case 0x5001:
2733 case 0x5002:
2734 /* LID switch events. Do not propagate */
2735 *ignore_acpi_ev = true;
2736 return true;
2737
2738 default:
2739 return false;
2740 }
2741 }
2742
2743 static bool hotkey_notify_thermal(const u32 hkey,
2744 bool *send_acpi_ev,
2745 bool *ignore_acpi_ev)
2746 {
2747 /* 0x6000-0x6FFF: thermal alarms */
2748 *send_acpi_ev = true;
2749 *ignore_acpi_ev = false;
2750
2751 switch (hkey) {
2752 case 0x6011:
2753 printk(TPACPI_CRIT
2754 "THERMAL ALARM: battery is too hot!\n");
2755 /* recommended action: warn user through gui */
2756 return true;
2757 case 0x6012:
2758 printk(TPACPI_ALERT
2759 "THERMAL EMERGENCY: battery is extremely hot!\n");
2760 /* recommended action: immediate sleep/hibernate */
2761 return true;
2762 case 0x6021:
2763 printk(TPACPI_CRIT
2764 "THERMAL ALARM: "
2765 "a sensor reports something is too hot!\n");
2766 /* recommended action: warn user through gui, that */
2767 /* some internal component is too hot */
2768 return true;
2769 case 0x6022:
2770 printk(TPACPI_ALERT
2771 "THERMAL EMERGENCY: "
2772 "a sensor reports something is extremely hot!\n");
2773 /* recommended action: immediate sleep/hibernate */
2774 return true;
2775 case 0x6030:
2776 printk(TPACPI_INFO
2777 "EC reports that Thermal Table has changed\n");
2778 /* recommended action: do nothing, we don't have
2779 * Lenovo ATM information */
2780 return true;
2781 default:
2782 printk(TPACPI_ALERT
2783 "THERMAL ALERT: unknown thermal alarm received\n");
2784 return false;
2785 }
2786 }
2787
2788 static void hotkey_notify(struct ibm_struct *ibm, u32 event)
2789 {
2790 u32 hkey;
2791 bool send_acpi_ev;
2792 bool ignore_acpi_ev;
2793 bool known_ev;
2794
2795 if (event != 0x80) {
2796 printk(TPACPI_ERR
2797 "unknown HKEY notification event %d\n", event);
2798 /* forward it to userspace, maybe it knows how to handle it */
2799 acpi_bus_generate_netlink_event(
2800 ibm->acpi->device->pnp.device_class,
2801 dev_name(&ibm->acpi->device->dev),
2802 event, 0);
2803 return;
2804 }
2805
2806 while (1) {
2807 if (!acpi_evalf(hkey_handle, &hkey, "MHKP", "d")) {
2808 printk(TPACPI_ERR "failed to retrieve HKEY event\n");
2809 return;
2810 }
2811
2812 if (hkey == 0) {
2813 /* queue empty */
2814 return;
2815 }
2816
2817 send_acpi_ev = true;
2818 ignore_acpi_ev = false;
2819
2820 switch (hkey >> 12) {
2821 case 1:
2822 /* 0x1000-0x1FFF: key presses */
2823 known_ev = hotkey_notify_hotkey(hkey, &send_acpi_ev,
2824 &ignore_acpi_ev);
2825 break;
2826 case 2:
2827 /* 0x2000-0x2FFF: Wakeup reason */
2828 known_ev = hotkey_notify_wakeup(hkey, &send_acpi_ev,
2829 &ignore_acpi_ev);
2830 break;
2831 case 3:
2832 /* 0x3000-0x3FFF: bay-related wakeups */
2833 if (hkey == 0x3003) {
2834 hotkey_autosleep_ack = 1;
2835 printk(TPACPI_INFO
2836 "bay ejected\n");
2837 hotkey_wakeup_hotunplug_complete_notify_change();
2838 known_ev = true;
2839 } else {
2840 known_ev = false;
2841 }
2842 break;
2843 case 4:
2844 /* 0x4000-0x4FFF: dock-related wakeups */
2845 if (hkey == 0x4003) {
2846 hotkey_autosleep_ack = 1;
2847 printk(TPACPI_INFO
2848 "undocked\n");
2849 hotkey_wakeup_hotunplug_complete_notify_change();
2850 known_ev = true;
2851 } else {
2852 known_ev = false;
2853 }
2854 break;
2855 case 5:
2856 /* 0x5000-0x5FFF: human interface helpers */
2857 known_ev = hotkey_notify_usrevent(hkey, &send_acpi_ev,
2858 &ignore_acpi_ev);
2859 break;
2860 case 6:
2861 /* 0x6000-0x6FFF: thermal alarms */
2862 known_ev = hotkey_notify_thermal(hkey, &send_acpi_ev,
2863 &ignore_acpi_ev);
2864 break;
2865 case 7:
2866 /* 0x7000-0x7FFF: misc */
2867 if (tp_features.hotkey_wlsw && hkey == 0x7000) {
2868 tpacpi_send_radiosw_update();
2869 send_acpi_ev = 0;
2870 known_ev = true;
2871 break;
2872 }
2873 /* fallthrough to default */
2874 default:
2875 known_ev = false;
2876 }
2877 if (!known_ev) {
2878 printk(TPACPI_NOTICE
2879 "unhandled HKEY event 0x%04x\n", hkey);
2880 printk(TPACPI_NOTICE
2881 "please report the conditions when this "
2882 "event happened to %s\n", TPACPI_MAIL);
2883 }
2884
2885 /* Legacy events */
2886 if (!ignore_acpi_ev &&
2887 (send_acpi_ev || hotkey_report_mode < 2)) {
2888 acpi_bus_generate_proc_event(ibm->acpi->device,
2889 event, hkey);
2890 }
2891
2892 /* netlink events */
2893 if (!ignore_acpi_ev && send_acpi_ev) {
2894 acpi_bus_generate_netlink_event(
2895 ibm->acpi->device->pnp.device_class,
2896 dev_name(&ibm->acpi->device->dev),
2897 event, hkey);
2898 }
2899 }
2900 }
2901
2902 static void hotkey_suspend(pm_message_t state)
2903 {
2904 /* Do these on suspend, we get the events on early resume! */
2905 hotkey_wakeup_reason = TP_ACPI_WAKEUP_NONE;
2906 hotkey_autosleep_ack = 0;
2907 }
2908
2909 static void hotkey_resume(void)
2910 {
2911 tpacpi_disable_brightness_delay();
2912
2913 if (hotkey_mask_get())
2914 printk(TPACPI_ERR
2915 "error while trying to read hot key mask "
2916 "from firmware\n");
2917 tpacpi_send_radiosw_update();
2918 hotkey_tablet_mode_notify_change();
2919 hotkey_wakeup_reason_notify_change();
2920 hotkey_wakeup_hotunplug_complete_notify_change();
2921 hotkey_poll_setup_safe(0);
2922 }
2923
2924 /* procfs -------------------------------------------------------------- */
2925 static int hotkey_read(char *p)
2926 {
2927 int res, status;
2928 int len = 0;
2929
2930 if (!tp_features.hotkey) {
2931 len += sprintf(p + len, "status:\t\tnot supported\n");
2932 return len;
2933 }
2934
2935 if (mutex_lock_killable(&hotkey_mutex))
2936 return -ERESTARTSYS;
2937 res = hotkey_status_get(&status);
2938 if (!res)
2939 res = hotkey_mask_get();
2940 mutex_unlock(&hotkey_mutex);
2941 if (res)
2942 return res;
2943
2944 len += sprintf(p + len, "status:\t\t%s\n", enabled(status, 0));
2945 if (tp_features.hotkey_mask) {
2946 len += sprintf(p + len, "mask:\t\t0x%08x\n", hotkey_mask);
2947 len += sprintf(p + len,
2948 "commands:\tenable, disable, reset, <mask>\n");
2949 } else {
2950 len += sprintf(p + len, "mask:\t\tnot supported\n");
2951 len += sprintf(p + len, "commands:\tenable, disable, reset\n");
2952 }
2953
2954 return len;
2955 }
2956
2957 static void hotkey_enabledisable_warn(bool enable)
2958 {
2959 tpacpi_log_usertask("procfs hotkey enable/disable");
2960 if (!WARN((tpacpi_lifecycle == TPACPI_LIFE_RUNNING || !enable),
2961 TPACPI_WARN
2962 "hotkey enable/disable functionality has been "
2963 "removed from the driver. Hotkeys are always "
2964 "enabled\n"))
2965 printk(TPACPI_ERR
2966 "Please remove the hotkey=enable module "
2967 "parameter, it is deprecated. Hotkeys are always "
2968 "enabled\n");
2969 }
2970
2971 static int hotkey_write(char *buf)
2972 {
2973 int res;
2974 u32 mask;
2975 char *cmd;
2976
2977 if (!tp_features.hotkey)
2978 return -ENODEV;
2979
2980 if (mutex_lock_killable(&hotkey_mutex))
2981 return -ERESTARTSYS;
2982
2983 mask = hotkey_mask;
2984
2985 res = 0;
2986 while ((cmd = next_cmd(&buf))) {
2987 if (strlencmp(cmd, "enable") == 0) {
2988 hotkey_enabledisable_warn(1);
2989 } else if (strlencmp(cmd, "disable") == 0) {
2990 hotkey_enabledisable_warn(0);
2991 res = -EPERM;
2992 } else if (strlencmp(cmd, "reset") == 0) {
2993 mask = hotkey_orig_mask;
2994 } else if (sscanf(cmd, "0x%x", &mask) == 1) {
2995 /* mask set */
2996 } else if (sscanf(cmd, "%x", &mask) == 1) {
2997 /* mask set */
2998 } else {
2999 res = -EINVAL;
3000 goto errexit;
3001 }
3002 }
3003
3004 if (!res)
3005 tpacpi_disclose_usertask("procfs hotkey",
3006 "set mask to 0x%08x\n", mask);
3007
3008 if (!res && mask != hotkey_mask)
3009 res = hotkey_mask_set(mask);
3010
3011 errexit:
3012 mutex_unlock(&hotkey_mutex);
3013 return res;
3014 }
3015
3016 static const struct acpi_device_id ibm_htk_device_ids[] = {
3017 {TPACPI_ACPI_HKEY_HID, 0},
3018 {"", 0},
3019 };
3020
3021 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver = {
3022 .hid = ibm_htk_device_ids,
3023 .notify = hotkey_notify,
3024 .handle = &hkey_handle,
3025 .type = ACPI_DEVICE_NOTIFY,
3026 };
3027
3028 static struct ibm_struct hotkey_driver_data = {
3029 .name = "hotkey",
3030 .read = hotkey_read,
3031 .write = hotkey_write,
3032 .exit = hotkey_exit,
3033 .resume = hotkey_resume,
3034 .suspend = hotkey_suspend,
3035 .acpi = &ibm_hotkey_acpidriver,
3036 };
3037
3038 /*************************************************************************
3039 * Bluetooth subdriver
3040 */
3041
3042 enum {
3043 /* ACPI GBDC/SBDC bits */
3044 TP_ACPI_BLUETOOTH_HWPRESENT = 0x01, /* Bluetooth hw available */
3045 TP_ACPI_BLUETOOTH_RADIOSSW = 0x02, /* Bluetooth radio enabled */
3046 TP_ACPI_BLUETOOTH_RESUMECTRL = 0x04, /* Bluetooth state at resume:
3047 off / last state */
3048 };
3049
3050 enum {
3051 /* ACPI \BLTH commands */
3052 TP_ACPI_BLTH_GET_ULTRAPORT_ID = 0x00, /* Get Ultraport BT ID */
3053 TP_ACPI_BLTH_GET_PWR_ON_RESUME = 0x01, /* Get power-on-resume state */
3054 TP_ACPI_BLTH_PWR_ON_ON_RESUME = 0x02, /* Resume powered on */
3055 TP_ACPI_BLTH_PWR_OFF_ON_RESUME = 0x03, /* Resume powered off */
3056 TP_ACPI_BLTH_SAVE_STATE = 0x05, /* Save state for S4/S5 */
3057 };
3058
3059 #define TPACPI_RFK_BLUETOOTH_SW_NAME "tpacpi_bluetooth_sw"
3060
3061 static struct rfkill *tpacpi_bluetooth_rfkill;
3062
3063 static void bluetooth_suspend(pm_message_t state)
3064 {
3065 /* Try to make sure radio will resume powered off */
3066 if (!acpi_evalf(NULL, NULL, "\\BLTH", "vd",
3067 TP_ACPI_BLTH_PWR_OFF_ON_RESUME))
3068 vdbg_printk(TPACPI_DBG_RFKILL,
3069 "bluetooth power down on resume request failed\n");
3070 }
3071
3072 static int bluetooth_get_radiosw(void)
3073 {
3074 int status;
3075
3076 if (!tp_features.bluetooth)
3077 return -ENODEV;
3078
3079 /* WLSW overrides bluetooth in firmware/hardware, reflect that */
3080 if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&status) && !status)
3081 return RFKILL_STATE_HARD_BLOCKED;
3082
3083 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3084 if (dbg_bluetoothemul)
3085 return (tpacpi_bluetooth_emulstate) ?
3086 RFKILL_STATE_UNBLOCKED : RFKILL_STATE_SOFT_BLOCKED;
3087 #endif
3088
3089 if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
3090 return -EIO;
3091
3092 return ((status & TP_ACPI_BLUETOOTH_RADIOSSW) != 0) ?
3093 RFKILL_STATE_UNBLOCKED : RFKILL_STATE_SOFT_BLOCKED;
3094 }
3095
3096 static void bluetooth_update_rfk(void)
3097 {
3098 int status;
3099
3100 if (!tpacpi_bluetooth_rfkill)
3101 return;
3102
3103 status = bluetooth_get_radiosw();
3104 if (status < 0)
3105 return;
3106 rfkill_force_state(tpacpi_bluetooth_rfkill, status);
3107
3108 vdbg_printk(TPACPI_DBG_RFKILL,
3109 "forced rfkill state to %d\n",
3110 status);
3111 }
3112
3113 static int bluetooth_set_radiosw(int radio_on, int update_rfk)
3114 {
3115 int status;
3116
3117 if (!tp_features.bluetooth)
3118 return -ENODEV;
3119
3120 /* WLSW overrides bluetooth in firmware/hardware, but there is no
3121 * reason to risk weird behaviour. */
3122 if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&status) && !status
3123 && radio_on)
3124 return -EPERM;
3125
3126 vdbg_printk(TPACPI_DBG_RFKILL,
3127 "will %s bluetooth\n", radio_on ? "enable" : "disable");
3128
3129 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3130 if (dbg_bluetoothemul) {
3131 tpacpi_bluetooth_emulstate = !!radio_on;
3132 if (update_rfk)
3133 bluetooth_update_rfk();
3134 return 0;
3135 }
3136 #endif
3137
3138 /* We make sure to keep TP_ACPI_BLUETOOTH_RESUMECTRL off */
3139 if (radio_on)
3140 status = TP_ACPI_BLUETOOTH_RADIOSSW;
3141 else
3142 status = 0;
3143 if (!acpi_evalf(hkey_handle, NULL, "SBDC", "vd", status))
3144 return -EIO;
3145
3146 if (update_rfk)
3147 bluetooth_update_rfk();
3148
3149 return 0;
3150 }
3151
3152 /* sysfs bluetooth enable ---------------------------------------------- */
3153 static ssize_t bluetooth_enable_show(struct device *dev,
3154 struct device_attribute *attr,
3155 char *buf)
3156 {
3157 int status;
3158
3159 printk_deprecated_rfkill_attribute("bluetooth_enable");
3160
3161 status = bluetooth_get_radiosw();
3162 if (status < 0)
3163 return status;
3164
3165 return snprintf(buf, PAGE_SIZE, "%d\n",
3166 (status == RFKILL_STATE_UNBLOCKED) ? 1 : 0);
3167 }
3168
3169 static ssize_t bluetooth_enable_store(struct device *dev,
3170 struct device_attribute *attr,
3171 const char *buf, size_t count)
3172 {
3173 unsigned long t;
3174 int res;
3175
3176 printk_deprecated_rfkill_attribute("bluetooth_enable");
3177
3178 if (parse_strtoul(buf, 1, &t))
3179 return -EINVAL;
3180
3181 tpacpi_disclose_usertask("bluetooth_enable", "set to %ld\n", t);
3182
3183 res = bluetooth_set_radiosw(t, 1);
3184
3185 return (res) ? res : count;
3186 }
3187
3188 static struct device_attribute dev_attr_bluetooth_enable =
3189 __ATTR(bluetooth_enable, S_IWUSR | S_IRUGO,
3190 bluetooth_enable_show, bluetooth_enable_store);
3191
3192 /* --------------------------------------------------------------------- */
3193
3194 static struct attribute *bluetooth_attributes[] = {
3195 &dev_attr_bluetooth_enable.attr,
3196 NULL
3197 };
3198
3199 static const struct attribute_group bluetooth_attr_group = {
3200 .attrs = bluetooth_attributes,
3201 };
3202
3203 static int tpacpi_bluetooth_rfk_get(void *data, enum rfkill_state *state)
3204 {
3205 int bts = bluetooth_get_radiosw();
3206
3207 if (bts < 0)
3208 return bts;
3209
3210 *state = bts;
3211 return 0;
3212 }
3213
3214 static int tpacpi_bluetooth_rfk_set(void *data, enum rfkill_state state)
3215 {
3216 dbg_printk(TPACPI_DBG_RFKILL,
3217 "request to change radio state to %d\n", state);
3218 return bluetooth_set_radiosw((state == RFKILL_STATE_UNBLOCKED), 0);
3219 }
3220
3221 static void bluetooth_shutdown(void)
3222 {
3223 /* Order firmware to save current state to NVRAM */
3224 if (!acpi_evalf(NULL, NULL, "\\BLTH", "vd",
3225 TP_ACPI_BLTH_SAVE_STATE))
3226 printk(TPACPI_NOTICE
3227 "failed to save bluetooth state to NVRAM\n");
3228 else
3229 vdbg_printk(TPACPI_DBG_RFKILL,
3230 "bluestooth state saved to NVRAM\n");
3231 }
3232
3233 static void bluetooth_exit(void)
3234 {
3235 bluetooth_shutdown();
3236
3237 if (tpacpi_bluetooth_rfkill)
3238 rfkill_unregister(tpacpi_bluetooth_rfkill);
3239
3240 sysfs_remove_group(&tpacpi_pdev->dev.kobj,
3241 &bluetooth_attr_group);
3242 }
3243
3244 static int __init bluetooth_init(struct ibm_init_struct *iibm)
3245 {
3246 int res;
3247 int status = 0;
3248
3249 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
3250 "initializing bluetooth subdriver\n");
3251
3252 TPACPI_ACPIHANDLE_INIT(hkey);
3253
3254 /* bluetooth not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
3255 G4x, R30, R31, R40e, R50e, T20-22, X20-21 */
3256 tp_features.bluetooth = hkey_handle &&
3257 acpi_evalf(hkey_handle, &status, "GBDC", "qd");
3258
3259 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
3260 "bluetooth is %s, status 0x%02x\n",
3261 str_supported(tp_features.bluetooth),
3262 status);
3263
3264 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3265 if (dbg_bluetoothemul) {
3266 tp_features.bluetooth = 1;
3267 printk(TPACPI_INFO
3268 "bluetooth switch emulation enabled\n");
3269 } else
3270 #endif
3271 if (tp_features.bluetooth &&
3272 !(status & TP_ACPI_BLUETOOTH_HWPRESENT)) {
3273 /* no bluetooth hardware present in system */
3274 tp_features.bluetooth = 0;
3275 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
3276 "bluetooth hardware not installed\n");
3277 }
3278
3279 if (!tp_features.bluetooth)
3280 return 1;
3281
3282 res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
3283 &bluetooth_attr_group);
3284 if (res)
3285 return res;
3286
3287 res = tpacpi_new_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID,
3288 &tpacpi_bluetooth_rfkill,
3289 RFKILL_TYPE_BLUETOOTH,
3290 TPACPI_RFK_BLUETOOTH_SW_NAME,
3291 true,
3292 tpacpi_bluetooth_rfk_set,
3293 tpacpi_bluetooth_rfk_get);
3294 if (res) {
3295 bluetooth_exit();
3296 return res;
3297 }
3298
3299 return 0;
3300 }
3301
3302 /* procfs -------------------------------------------------------------- */
3303 static int bluetooth_read(char *p)
3304 {
3305 int len = 0;
3306 int status = bluetooth_get_radiosw();
3307
3308 if (!tp_features.bluetooth)
3309 len += sprintf(p + len, "status:\t\tnot supported\n");
3310 else {
3311 len += sprintf(p + len, "status:\t\t%s\n",
3312 (status == RFKILL_STATE_UNBLOCKED) ?
3313 "enabled" : "disabled");
3314 len += sprintf(p + len, "commands:\tenable, disable\n");
3315 }
3316
3317 return len;
3318 }
3319
3320 static int bluetooth_write(char *buf)
3321 {
3322 char *cmd;
3323 int state = -1;
3324
3325 if (!tp_features.bluetooth)
3326 return -ENODEV;
3327
3328 while ((cmd = next_cmd(&buf))) {
3329 if (strlencmp(cmd, "enable") == 0) {
3330 state = 1;
3331 } else if (strlencmp(cmd, "disable") == 0) {
3332 state = 0;
3333 } else
3334 return -EINVAL;
3335 }
3336
3337 if (state != -1) {
3338 tpacpi_disclose_usertask("procfs bluetooth",
3339 "attempt to %s\n",
3340 state ? "enable" : "disable");
3341 bluetooth_set_radiosw(state, 1);
3342 }
3343
3344 return 0;
3345 }
3346
3347 static struct ibm_struct bluetooth_driver_data = {
3348 .name = "bluetooth",
3349 .read = bluetooth_read,
3350 .write = bluetooth_write,
3351 .exit = bluetooth_exit,
3352 .suspend = bluetooth_suspend,
3353 .shutdown = bluetooth_shutdown,
3354 };
3355
3356 /*************************************************************************
3357 * Wan subdriver
3358 */
3359
3360 enum {
3361 /* ACPI GWAN/SWAN bits */
3362 TP_ACPI_WANCARD_HWPRESENT = 0x01, /* Wan hw available */
3363 TP_ACPI_WANCARD_RADIOSSW = 0x02, /* Wan radio enabled */
3364 TP_ACPI_WANCARD_RESUMECTRL = 0x04, /* Wan state at resume:
3365 off / last state */
3366 };
3367
3368 #define TPACPI_RFK_WWAN_SW_NAME "tpacpi_wwan_sw"
3369
3370 static struct rfkill *tpacpi_wan_rfkill;
3371
3372 static void wan_suspend(pm_message_t state)
3373 {
3374 /* Try to make sure radio will resume powered off */
3375 if (!acpi_evalf(NULL, NULL, "\\WGSV", "qvd",
3376 TP_ACPI_WGSV_PWR_OFF_ON_RESUME))
3377 vdbg_printk(TPACPI_DBG_RFKILL,
3378 "WWAN power down on resume request failed\n");
3379 }
3380
3381 static int wan_get_radiosw(void)
3382 {
3383 int status;
3384
3385 if (!tp_features.wan)
3386 return -ENODEV;
3387
3388 /* WLSW overrides WWAN in firmware/hardware, reflect that */
3389 if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&status) && !status)
3390 return RFKILL_STATE_HARD_BLOCKED;
3391
3392 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3393 if (dbg_wwanemul)
3394 return (tpacpi_wwan_emulstate) ?
3395 RFKILL_STATE_UNBLOCKED : RFKILL_STATE_SOFT_BLOCKED;
3396 #endif
3397
3398 if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
3399 return -EIO;
3400
3401 return ((status & TP_ACPI_WANCARD_RADIOSSW) != 0) ?
3402 RFKILL_STATE_UNBLOCKED : RFKILL_STATE_SOFT_BLOCKED;
3403 }
3404
3405 static void wan_update_rfk(void)
3406 {
3407 int status;
3408
3409 if (!tpacpi_wan_rfkill)
3410 return;
3411
3412 status = wan_get_radiosw();
3413 if (status < 0)
3414 return;
3415 rfkill_force_state(tpacpi_wan_rfkill, status);
3416
3417 vdbg_printk(TPACPI_DBG_RFKILL,
3418 "forced rfkill state to %d\n",
3419 status);
3420 }
3421
3422 static int wan_set_radiosw(int radio_on, int update_rfk)
3423 {
3424 int status;
3425
3426 if (!tp_features.wan)
3427 return -ENODEV;
3428
3429 /* WLSW overrides bluetooth in firmware/hardware, but there is no
3430 * reason to risk weird behaviour. */
3431 if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&status) && !status
3432 && radio_on)
3433 return -EPERM;
3434
3435 vdbg_printk(TPACPI_DBG_RFKILL,
3436 "will %s WWAN\n", radio_on ? "enable" : "disable");
3437
3438 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3439 if (dbg_wwanemul) {
3440 tpacpi_wwan_emulstate = !!radio_on;
3441 if (update_rfk)
3442 wan_update_rfk();
3443 return 0;
3444 }
3445 #endif
3446
3447 /* We make sure to keep TP_ACPI_WANCARD_RESUMECTRL off */
3448 if (radio_on)
3449 status = TP_ACPI_WANCARD_RADIOSSW;
3450 else
3451 status = 0;
3452 if (!acpi_evalf(hkey_handle, NULL, "SWAN", "vd", status))
3453 return -EIO;
3454
3455 if (update_rfk)
3456 wan_update_rfk();
3457
3458 return 0;
3459 }
3460
3461 /* sysfs wan enable ---------------------------------------------------- */
3462 static ssize_t wan_enable_show(struct device *dev,
3463 struct device_attribute *attr,
3464 char *buf)
3465 {
3466 int status;
3467
3468 printk_deprecated_rfkill_attribute("wwan_enable");
3469
3470 status = wan_get_radiosw();
3471 if (status < 0)
3472 return status;
3473
3474 return snprintf(buf, PAGE_SIZE, "%d\n",
3475 (status == RFKILL_STATE_UNBLOCKED) ? 1 : 0);
3476 }
3477
3478 static ssize_t wan_enable_store(struct device *dev,
3479 struct device_attribute *attr,
3480 const char *buf, size_t count)
3481 {
3482 unsigned long t;
3483 int res;
3484
3485 printk_deprecated_rfkill_attribute("wwan_enable");
3486
3487 if (parse_strtoul(buf, 1, &t))
3488 return -EINVAL;
3489
3490 tpacpi_disclose_usertask("wwan_enable", "set to %ld\n", t);
3491
3492 res = wan_set_radiosw(t, 1);
3493
3494 return (res) ? res : count;
3495 }
3496
3497 static struct device_attribute dev_attr_wan_enable =
3498 __ATTR(wwan_enable, S_IWUSR | S_IRUGO,
3499 wan_enable_show, wan_enable_store);
3500
3501 /* --------------------------------------------------------------------- */
3502
3503 static struct attribute *wan_attributes[] = {
3504 &dev_attr_wan_enable.attr,
3505 NULL
3506 };
3507
3508 static const struct attribute_group wan_attr_group = {
3509 .attrs = wan_attributes,
3510 };
3511
3512 static int tpacpi_wan_rfk_get(void *data, enum rfkill_state *state)
3513 {
3514 int wans = wan_get_radiosw();
3515
3516 if (wans < 0)
3517 return wans;
3518
3519 *state = wans;
3520 return 0;
3521 }
3522
3523 static int tpacpi_wan_rfk_set(void *data, enum rfkill_state state)
3524 {
3525 dbg_printk(TPACPI_DBG_RFKILL,
3526 "request to change radio state to %d\n", state);
3527 return wan_set_radiosw((state == RFKILL_STATE_UNBLOCKED), 0);
3528 }
3529
3530 static void wan_shutdown(void)
3531 {
3532 /* Order firmware to save current state to NVRAM */
3533 if (!acpi_evalf(NULL, NULL, "\\WGSV", "vd",
3534 TP_ACPI_WGSV_SAVE_STATE))
3535 printk(TPACPI_NOTICE
3536 "failed to save WWAN state to NVRAM\n");
3537 else
3538 vdbg_printk(TPACPI_DBG_RFKILL,
3539 "WWAN state saved to NVRAM\n");
3540 }
3541
3542 static void wan_exit(void)
3543 {
3544 wan_shutdown();
3545
3546 if (tpacpi_wan_rfkill)
3547 rfkill_unregister(tpacpi_wan_rfkill);
3548
3549 sysfs_remove_group(&tpacpi_pdev->dev.kobj,
3550 &wan_attr_group);
3551 }
3552
3553 static int __init wan_init(struct ibm_init_struct *iibm)
3554 {
3555 int res;
3556 int status = 0;
3557
3558 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
3559 "initializing wan subdriver\n");
3560
3561 TPACPI_ACPIHANDLE_INIT(hkey);
3562
3563 tp_features.wan = hkey_handle &&
3564 acpi_evalf(hkey_handle, &status, "GWAN", "qd");
3565
3566 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
3567 "wan is %s, status 0x%02x\n",
3568 str_supported(tp_features.wan),
3569 status);
3570
3571 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3572 if (dbg_wwanemul) {
3573 tp_features.wan = 1;
3574 printk(TPACPI_INFO
3575 "wwan switch emulation enabled\n");
3576 } else
3577 #endif
3578 if (tp_features.wan &&
3579 !(status & TP_ACPI_WANCARD_HWPRESENT)) {
3580 /* no wan hardware present in system */
3581 tp_features.wan = 0;
3582 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
3583 "wan hardware not installed\n");
3584 }
3585
3586 if (!tp_features.wan)
3587 return 1;
3588
3589 res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
3590 &wan_attr_group);
3591 if (res)
3592 return res;
3593
3594 res = tpacpi_new_rfkill(TPACPI_RFK_WWAN_SW_ID,
3595 &tpacpi_wan_rfkill,
3596 RFKILL_TYPE_WWAN,
3597 TPACPI_RFK_WWAN_SW_NAME,
3598 true,
3599 tpacpi_wan_rfk_set,
3600 tpacpi_wan_rfk_get);
3601 if (res) {
3602 wan_exit();
3603 return res;
3604 }
3605
3606 return 0;
3607 }
3608
3609 /* procfs -------------------------------------------------------------- */
3610 static int wan_read(char *p)
3611 {
3612 int len = 0;
3613 int status = wan_get_radiosw();
3614
3615 tpacpi_disclose_usertask("procfs wan", "read");
3616
3617 if (!tp_features.wan)
3618 len += sprintf(p + len, "status:\t\tnot supported\n");
3619 else {
3620 len += sprintf(p + len, "status:\t\t%s\n",
3621 (status == RFKILL_STATE_UNBLOCKED) ?
3622 "enabled" : "disabled");
3623 len += sprintf(p + len, "commands:\tenable, disable\n");
3624 }
3625
3626 return len;
3627 }
3628
3629 static int wan_write(char *buf)
3630 {
3631 char *cmd;
3632 int state = -1;
3633
3634 if (!tp_features.wan)
3635 return -ENODEV;
3636
3637 while ((cmd = next_cmd(&buf))) {
3638 if (strlencmp(cmd, "enable") == 0) {
3639 state = 1;
3640 } else if (strlencmp(cmd, "disable") == 0) {
3641 state = 0;
3642 } else
3643 return -EINVAL;
3644 }
3645
3646 if (state != -1) {
3647 tpacpi_disclose_usertask("procfs wan",
3648 "attempt to %s\n",
3649 state ? "enable" : "disable");
3650 wan_set_radiosw(state, 1);
3651 }
3652
3653 return 0;
3654 }
3655
3656 static struct ibm_struct wan_driver_data = {
3657 .name = "wan",
3658 .read = wan_read,
3659 .write = wan_write,
3660 .exit = wan_exit,
3661 .suspend = wan_suspend,
3662 .shutdown = wan_shutdown,
3663 };
3664
3665 /*************************************************************************
3666 * UWB subdriver
3667 */
3668
3669 enum {
3670 /* ACPI GUWB/SUWB bits */
3671 TP_ACPI_UWB_HWPRESENT = 0x01, /* UWB hw available */
3672 TP_ACPI_UWB_RADIOSSW = 0x02, /* UWB radio enabled */
3673 };
3674
3675 #define TPACPI_RFK_UWB_SW_NAME "tpacpi_uwb_sw"
3676
3677 static struct rfkill *tpacpi_uwb_rfkill;
3678
3679 static int uwb_get_radiosw(void)
3680 {
3681 int status;
3682
3683 if (!tp_features.uwb)
3684 return -ENODEV;
3685
3686 /* WLSW overrides UWB in firmware/hardware, reflect that */
3687 if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&status) && !status)
3688 return RFKILL_STATE_HARD_BLOCKED;
3689
3690 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3691 if (dbg_uwbemul)
3692 return (tpacpi_uwb_emulstate) ?
3693 RFKILL_STATE_UNBLOCKED : RFKILL_STATE_SOFT_BLOCKED;
3694 #endif
3695
3696 if (!acpi_evalf(hkey_handle, &status, "GUWB", "d"))
3697 return -EIO;
3698
3699 return ((status & TP_ACPI_UWB_RADIOSSW) != 0) ?
3700 RFKILL_STATE_UNBLOCKED : RFKILL_STATE_SOFT_BLOCKED;
3701 }
3702
3703 static void uwb_update_rfk(void)
3704 {
3705 int status;
3706
3707 if (!tpacpi_uwb_rfkill)
3708 return;
3709
3710 status = uwb_get_radiosw();
3711 if (status < 0)
3712 return;
3713 rfkill_force_state(tpacpi_uwb_rfkill, status);
3714
3715 vdbg_printk(TPACPI_DBG_RFKILL,
3716 "forced rfkill state to %d\n",
3717 status);
3718 }
3719
3720 static int uwb_set_radiosw(int radio_on, int update_rfk)
3721 {
3722 int status;
3723
3724 if (!tp_features.uwb)
3725 return -ENODEV;
3726
3727 /* WLSW overrides UWB in firmware/hardware, but there is no
3728 * reason to risk weird behaviour. */
3729 if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&status) && !status
3730 && radio_on)
3731 return -EPERM;
3732
3733 vdbg_printk(TPACPI_DBG_RFKILL,
3734 "will %s UWB\n", radio_on ? "enable" : "disable");
3735
3736 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3737 if (dbg_uwbemul) {
3738 tpacpi_uwb_emulstate = !!radio_on;
3739 if (update_rfk)
3740 uwb_update_rfk();
3741 return 0;
3742 }
3743 #endif
3744
3745 status = (radio_on) ? TP_ACPI_UWB_RADIOSSW : 0;
3746 if (!acpi_evalf(hkey_handle, NULL, "SUWB", "vd", status))
3747 return -EIO;
3748
3749 if (update_rfk)
3750 uwb_update_rfk();
3751
3752 return 0;
3753 }
3754
3755 /* --------------------------------------------------------------------- */
3756
3757 static int tpacpi_uwb_rfk_get(void *data, enum rfkill_state *state)
3758 {
3759 int uwbs = uwb_get_radiosw();
3760
3761 if (uwbs < 0)
3762 return uwbs;
3763
3764 *state = uwbs;
3765 return 0;
3766 }
3767
3768 static int tpacpi_uwb_rfk_set(void *data, enum rfkill_state state)
3769 {
3770 dbg_printk(TPACPI_DBG_RFKILL,
3771 "request to change radio state to %d\n", state);
3772 return uwb_set_radiosw((state == RFKILL_STATE_UNBLOCKED), 0);
3773 }
3774
3775 static void uwb_exit(void)
3776 {
3777 if (tpacpi_uwb_rfkill)
3778 rfkill_unregister(tpacpi_uwb_rfkill);
3779 }
3780
3781 static int __init uwb_init(struct ibm_init_struct *iibm)
3782 {
3783 int res;
3784 int status = 0;
3785
3786 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
3787 "initializing uwb subdriver\n");
3788
3789 TPACPI_ACPIHANDLE_INIT(hkey);
3790
3791 tp_features.uwb = hkey_handle &&
3792 acpi_evalf(hkey_handle, &status, "GUWB", "qd");
3793
3794 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
3795 "uwb is %s, status 0x%02x\n",
3796 str_supported(tp_features.uwb),
3797 status);
3798
3799 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3800 if (dbg_uwbemul) {
3801 tp_features.uwb = 1;
3802 printk(TPACPI_INFO
3803 "uwb switch emulation enabled\n");
3804 } else
3805 #endif
3806 if (tp_features.uwb &&
3807 !(status & TP_ACPI_UWB_HWPRESENT)) {
3808 /* no uwb hardware present in system */
3809 tp_features.uwb = 0;
3810 dbg_printk(TPACPI_DBG_INIT,
3811 "uwb hardware not installed\n");
3812 }
3813
3814 if (!tp_features.uwb)
3815 return 1;
3816
3817 res = tpacpi_new_rfkill(TPACPI_RFK_UWB_SW_ID,
3818 &tpacpi_uwb_rfkill,
3819 RFKILL_TYPE_UWB,
3820 TPACPI_RFK_UWB_SW_NAME,
3821 false,
3822 tpacpi_uwb_rfk_set,
3823 tpacpi_uwb_rfk_get);
3824
3825 return res;
3826 }
3827
3828 static struct ibm_struct uwb_driver_data = {
3829 .name = "uwb",
3830 .exit = uwb_exit,
3831 .flags.experimental = 1,
3832 };
3833
3834 /*************************************************************************
3835 * Video subdriver
3836 */
3837
3838 #ifdef CONFIG_THINKPAD_ACPI_VIDEO
3839
3840 enum video_access_mode {
3841 TPACPI_VIDEO_NONE = 0,
3842 TPACPI_VIDEO_570, /* 570 */
3843 TPACPI_VIDEO_770, /* 600e/x, 770e, 770x */
3844 TPACPI_VIDEO_NEW, /* all others */
3845 };
3846
3847 enum { /* video status flags, based on VIDEO_570 */
3848 TP_ACPI_VIDEO_S_LCD = 0x01, /* LCD output enabled */
3849 TP_ACPI_VIDEO_S_CRT = 0x02, /* CRT output enabled */
3850 TP_ACPI_VIDEO_S_DVI = 0x08, /* DVI output enabled */
3851 };
3852
3853 enum { /* TPACPI_VIDEO_570 constants */
3854 TP_ACPI_VIDEO_570_PHSCMD = 0x87, /* unknown magic constant :( */
3855 TP_ACPI_VIDEO_570_PHSMASK = 0x03, /* PHS bits that map to
3856 * video_status_flags */
3857 TP_ACPI_VIDEO_570_PHS2CMD = 0x8b, /* unknown magic constant :( */
3858 TP_ACPI_VIDEO_570_PHS2SET = 0x80, /* unknown magic constant :( */
3859 };
3860
3861 static enum video_access_mode video_supported;
3862 static int video_orig_autosw;
3863
3864 static int video_autosw_get(void);
3865 static int video_autosw_set(int enable);
3866
3867 TPACPI_HANDLE(vid2, root, "\\_SB.PCI0.AGPB.VID"); /* G41 */
3868
3869 static int __init video_init(struct ibm_init_struct *iibm)
3870 {
3871 int ivga;
3872
3873 vdbg_printk(TPACPI_DBG_INIT, "initializing video subdriver\n");
3874
3875 TPACPI_ACPIHANDLE_INIT(vid);
3876 TPACPI_ACPIHANDLE_INIT(vid2);
3877
3878 if (vid2_handle && acpi_evalf(NULL, &ivga, "\\IVGA", "d") && ivga)
3879 /* G41, assume IVGA doesn't change */
3880 vid_handle = vid2_handle;
3881
3882 if (!vid_handle)
3883 /* video switching not supported on R30, R31 */
3884 video_supported = TPACPI_VIDEO_NONE;
3885 else if (acpi_evalf(vid_handle, &video_orig_autosw, "SWIT", "qd"))
3886 /* 570 */
3887 video_supported = TPACPI_VIDEO_570;
3888 else if (acpi_evalf(vid_handle, &video_orig_autosw, "^VADL", "qd"))
3889 /* 600e/x, 770e, 770x */
3890 video_supported = TPACPI_VIDEO_770;
3891 else
3892 /* all others */
3893 video_supported = TPACPI_VIDEO_NEW;
3894
3895 vdbg_printk(TPACPI_DBG_INIT, "video is %s, mode %d\n",
3896 str_supported(video_supported != TPACPI_VIDEO_NONE),
3897 video_supported);
3898
3899 return (video_supported != TPACPI_VIDEO_NONE)? 0 : 1;
3900 }
3901
3902 static void video_exit(void)
3903 {
3904 dbg_printk(TPACPI_DBG_EXIT,
3905 "restoring original video autoswitch mode\n");
3906 if (video_autosw_set(video_orig_autosw))
3907 printk(TPACPI_ERR "error while trying to restore original "
3908 "video autoswitch mode\n");
3909 }
3910
3911 static int video_outputsw_get(void)
3912 {
3913 int status = 0;
3914 int i;
3915
3916 switch (video_supported) {
3917 case TPACPI_VIDEO_570:
3918 if (!acpi_evalf(NULL, &i, "\\_SB.PHS", "dd",
3919 TP_ACPI_VIDEO_570_PHSCMD))
3920 return -EIO;
3921 status = i & TP_ACPI_VIDEO_570_PHSMASK;
3922 break;
3923 case TPACPI_VIDEO_770:
3924 if (!acpi_evalf(NULL, &i, "\\VCDL", "d"))
3925 return -EIO;
3926 if (i)
3927 status |= TP_ACPI_VIDEO_S_LCD;
3928 if (!acpi_evalf(NULL, &i, "\\VCDC", "d"))
3929 return -EIO;
3930 if (i)
3931 status |= TP_ACPI_VIDEO_S_CRT;
3932 break;
3933 case TPACPI_VIDEO_NEW:
3934 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 1) ||
3935 !acpi_evalf(NULL, &i, "\\VCDC", "d"))
3936 return -EIO;
3937 if (i)
3938 status |= TP_ACPI_VIDEO_S_CRT;
3939
3940 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0) ||
3941 !acpi_evalf(NULL, &i, "\\VCDL", "d"))
3942 return -EIO;
3943 if (i)
3944 status |= TP_ACPI_VIDEO_S_LCD;
3945 if (!acpi_evalf(NULL, &i, "\\VCDD", "d"))
3946 return -EIO;
3947 if (i)
3948 status |= TP_ACPI_VIDEO_S_DVI;
3949 break;
3950 default:
3951 return -ENOSYS;
3952 }
3953
3954 return status;
3955 }
3956
3957 static int video_outputsw_set(int status)
3958 {
3959 int autosw;
3960 int res = 0;
3961
3962 switch (video_supported) {
3963 case TPACPI_VIDEO_570:
3964 res = acpi_evalf(NULL, NULL,
3965 "\\_SB.PHS2", "vdd",
3966 TP_ACPI_VIDEO_570_PHS2CMD,
3967 status | TP_ACPI_VIDEO_570_PHS2SET);
3968 break;
3969 case TPACPI_VIDEO_770:
3970 autosw = video_autosw_get();
3971 if (autosw < 0)
3972 return autosw;
3973
3974 res = video_autosw_set(1);
3975 if (res)
3976 return res;
3977 res = acpi_evalf(vid_handle, NULL,
3978 "ASWT", "vdd", status * 0x100, 0);
3979 if (!autosw && video_autosw_set(autosw)) {
3980 printk(TPACPI_ERR
3981 "video auto-switch left enabled due to error\n");
3982 return -EIO;
3983 }
3984 break;
3985 case TPACPI_VIDEO_NEW:
3986 res = acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0x80) &&
3987 acpi_evalf(NULL, NULL, "\\VSDS", "vdd", status, 1);
3988 break;
3989 default:
3990 return -ENOSYS;
3991 }
3992
3993 return (res)? 0 : -EIO;
3994 }
3995
3996 static int video_autosw_get(void)
3997 {
3998 int autosw = 0;
3999
4000 switch (video_supported) {
4001 case TPACPI_VIDEO_570:
4002 if (!acpi_evalf(vid_handle, &autosw, "SWIT", "d"))
4003 return -EIO;
4004 break;
4005 case TPACPI_VIDEO_770:
4006 case TPACPI_VIDEO_NEW:
4007 if (!acpi_evalf(vid_handle, &autosw, "^VDEE", "d"))
4008 return -EIO;
4009 break;
4010 default:
4011 return -ENOSYS;
4012 }
4013
4014 return autosw & 1;
4015 }
4016
4017 static int video_autosw_set(int enable)
4018 {
4019 if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", (enable)? 1 : 0))
4020 return -EIO;
4021 return 0;
4022 }
4023
4024 static int video_outputsw_cycle(void)
4025 {
4026 int autosw = video_autosw_get();
4027 int res;
4028
4029 if (autosw < 0)
4030 return autosw;
4031
4032 switch (video_supported) {
4033 case TPACPI_VIDEO_570:
4034 res = video_autosw_set(1);
4035 if (res)
4036 return res;
4037 res = acpi_evalf(ec_handle, NULL, "_Q16", "v");
4038 break;
4039 case TPACPI_VIDEO_770:
4040 case TPACPI_VIDEO_NEW:
4041 res = video_autosw_set(1);
4042 if (res)
4043 return res;
4044 res = acpi_evalf(vid_handle, NULL, "VSWT", "v");
4045 break;
4046 default:
4047 return -ENOSYS;
4048 }
4049 if (!autosw && video_autosw_set(autosw)) {
4050 printk(TPACPI_ERR
4051 "video auto-switch left enabled due to error\n");
4052 return -EIO;
4053 }
4054
4055 return (res)? 0 : -EIO;
4056 }
4057
4058 static int video_expand_toggle(void)
4059 {
4060 switch (video_supported) {
4061 case TPACPI_VIDEO_570:
4062 return acpi_evalf(ec_handle, NULL, "_Q17", "v")?
4063 0 : -EIO;
4064 case TPACPI_VIDEO_770:
4065 return acpi_evalf(vid_handle, NULL, "VEXP", "v")?
4066 0 : -EIO;
4067 case TPACPI_VIDEO_NEW:
4068 return acpi_evalf(NULL, NULL, "\\VEXP", "v")?
4069 0 : -EIO;
4070 default:
4071 return -ENOSYS;
4072 }
4073 /* not reached */
4074 }
4075
4076 static int video_read(char *p)
4077 {
4078 int status, autosw;
4079 int len = 0;
4080
4081 if (video_supported == TPACPI_VIDEO_NONE) {
4082 len += sprintf(p + len, "status:\t\tnot supported\n");
4083 return len;
4084 }
4085
4086 status = video_outputsw_get();
4087 if (status < 0)
4088 return status;
4089
4090 autosw = video_autosw_get();
4091 if (autosw < 0)
4092 return autosw;
4093
4094 len += sprintf(p + len, "status:\t\tsupported\n");
4095 len += sprintf(p + len, "lcd:\t\t%s\n", enabled(status, 0));
4096 len += sprintf(p + len, "crt:\t\t%s\n", enabled(status, 1));
4097 if (video_supported == TPACPI_VIDEO_NEW)
4098 len += sprintf(p + len, "dvi:\t\t%s\n", enabled(status, 3));
4099 len += sprintf(p + len, "auto:\t\t%s\n", enabled(autosw, 0));
4100 len += sprintf(p + len, "commands:\tlcd_enable, lcd_disable\n");
4101 len += sprintf(p + len, "commands:\tcrt_enable, crt_disable\n");
4102 if (video_supported == TPACPI_VIDEO_NEW)
4103 len += sprintf(p + len, "commands:\tdvi_enable, dvi_disable\n");
4104 len += sprintf(p + len, "commands:\tauto_enable, auto_disable\n");
4105 len += sprintf(p + len, "commands:\tvideo_switch, expand_toggle\n");
4106
4107 return len;
4108 }
4109
4110 static int video_write(char *buf)
4111 {
4112 char *cmd;
4113 int enable, disable, status;
4114 int res;
4115
4116 if (video_supported == TPACPI_VIDEO_NONE)
4117 return -ENODEV;
4118
4119 enable = 0;
4120 disable = 0;
4121
4122 while ((cmd = next_cmd(&buf))) {
4123 if (strlencmp(cmd, "lcd_enable") == 0) {
4124 enable |= TP_ACPI_VIDEO_S_LCD;
4125 } else if (strlencmp(cmd, "lcd_disable") == 0) {
4126 disable |= TP_ACPI_VIDEO_S_LCD;
4127 } else if (strlencmp(cmd, "crt_enable") == 0) {
4128 enable |= TP_ACPI_VIDEO_S_CRT;
4129 } else if (strlencmp(cmd, "crt_disable") == 0) {
4130 disable |= TP_ACPI_VIDEO_S_CRT;
4131 } else if (video_supported == TPACPI_VIDEO_NEW &&
4132 strlencmp(cmd, "dvi_enable") == 0) {
4133 enable |= TP_ACPI_VIDEO_S_DVI;
4134 } else if (video_supported == TPACPI_VIDEO_NEW &&
4135 strlencmp(cmd, "dvi_disable") == 0) {
4136 disable |= TP_ACPI_VIDEO_S_DVI;
4137 } else if (strlencmp(cmd, "auto_enable") == 0) {
4138 res = video_autosw_set(1);
4139 if (res)
4140 return res;
4141 } else if (strlencmp(cmd, "auto_disable") == 0) {
4142 res = video_autosw_set(0);
4143 if (res)
4144 return res;
4145 } else if (strlencmp(cmd, "video_switch") == 0) {
4146 res = video_outputsw_cycle();
4147 if (res)
4148 return res;
4149 } else if (strlencmp(cmd, "expand_toggle") == 0) {
4150 res = video_expand_toggle();
4151 if (res)
4152 return res;
4153 } else
4154 return -EINVAL;
4155 }
4156
4157 if (enable || disable) {
4158 status = video_outputsw_get();
4159 if (status < 0)
4160 return status;
4161 res = video_outputsw_set((status & ~disable) | enable);
4162 if (res)
4163 return res;
4164 }
4165
4166 return 0;
4167 }
4168
4169 static struct ibm_struct video_driver_data = {
4170 .name = "video",
4171 .read = video_read,
4172 .write = video_write,
4173 .exit = video_exit,
4174 };
4175
4176 #endif /* CONFIG_THINKPAD_ACPI_VIDEO */
4177
4178 /*************************************************************************
4179 * Light (thinklight) subdriver
4180 */
4181
4182 TPACPI_HANDLE(lght, root, "\\LGHT"); /* A21e, A2xm/p, T20-22, X20-21 */
4183 TPACPI_HANDLE(ledb, ec, "LEDB"); /* G4x */
4184
4185 static int light_get_status(void)
4186 {
4187 int status = 0;
4188
4189 if (tp_features.light_status) {
4190 if (!acpi_evalf(ec_handle, &status, "KBLT", "d"))
4191 return -EIO;
4192 return (!!status);
4193 }
4194
4195 return -ENXIO;
4196 }
4197
4198 static int light_set_status(int status)
4199 {
4200 int rc;
4201
4202 if (tp_features.light) {
4203 if (cmos_handle) {
4204 rc = acpi_evalf(cmos_handle, NULL, NULL, "vd",
4205 (status)?
4206 TP_CMOS_THINKLIGHT_ON :
4207 TP_CMOS_THINKLIGHT_OFF);
4208 } else {
4209 rc = acpi_evalf(lght_handle, NULL, NULL, "vd",
4210 (status)? 1 : 0);
4211 }
4212 return (rc)? 0 : -EIO;
4213 }
4214
4215 return -ENXIO;
4216 }
4217
4218 static void light_set_status_worker(struct work_struct *work)
4219 {
4220 struct tpacpi_led_classdev *data =
4221 container_of(work, struct tpacpi_led_classdev, work);
4222
4223 if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING))
4224 light_set_status((data->new_state != TPACPI_LED_OFF));
4225 }
4226
4227 static void light_sysfs_set(struct led_classdev *led_cdev,
4228 enum led_brightness brightness)
4229 {
4230 struct tpacpi_led_classdev *data =
4231 container_of(led_cdev,
4232 struct tpacpi_led_classdev,
4233 led_classdev);
4234 data->new_state = (brightness != LED_OFF) ?
4235 TPACPI_LED_ON : TPACPI_LED_OFF;
4236 queue_work(tpacpi_wq, &data->work);
4237 }
4238
4239 static enum led_brightness light_sysfs_get(struct led_classdev *led_cdev)
4240 {
4241 return (light_get_status() == 1)? LED_FULL : LED_OFF;
4242 }
4243
4244 static struct tpacpi_led_classdev tpacpi_led_thinklight = {
4245 .led_classdev = {
4246 .name = "tpacpi::thinklight",
4247 .brightness_set = &light_sysfs_set,
4248 .brightness_get = &light_sysfs_get,
4249 }
4250 };
4251
4252 static int __init light_init(struct ibm_init_struct *iibm)
4253 {
4254 int rc;
4255
4256 vdbg_printk(TPACPI_DBG_INIT, "initializing light subdriver\n");
4257
4258 TPACPI_ACPIHANDLE_INIT(ledb);
4259 TPACPI_ACPIHANDLE_INIT(lght);
4260 TPACPI_ACPIHANDLE_INIT(cmos);
4261 INIT_WORK(&tpacpi_led_thinklight.work, light_set_status_worker);
4262
4263 /* light not supported on 570, 600e/x, 770e, 770x, G4x, R30, R31 */
4264 tp_features.light = (cmos_handle || lght_handle) && !ledb_handle;
4265
4266 if (tp_features.light)
4267 /* light status not supported on
4268 570, 600e/x, 770e, 770x, G4x, R30, R31, R32, X20 */
4269 tp_features.light_status =
4270 acpi_evalf(ec_handle, NULL, "KBLT", "qv");
4271
4272 vdbg_printk(TPACPI_DBG_INIT, "light is %s, light status is %s\n",
4273 str_supported(tp_features.light),
4274 str_supported(tp_features.light_status));
4275
4276 if (!tp_features.light)
4277 return 1;
4278
4279 rc = led_classdev_register(&tpacpi_pdev->dev,
4280 &tpacpi_led_thinklight.led_classdev);
4281
4282 if (rc < 0) {
4283 tp_features.light = 0;
4284 tp_features.light_status = 0;
4285 } else {
4286 rc = 0;
4287 }
4288
4289 return rc;
4290 }
4291
4292 static void light_exit(void)
4293 {
4294 led_classdev_unregister(&tpacpi_led_thinklight.led_classdev);
4295 if (work_pending(&tpacpi_led_thinklight.work))
4296 flush_workqueue(tpacpi_wq);
4297 }
4298
4299 static int light_read(char *p)
4300 {
4301 int len = 0;
4302 int status;
4303
4304 if (!tp_features.light) {
4305 len += sprintf(p + len, "status:\t\tnot supported\n");
4306 } else if (!tp_features.light_status) {
4307 len += sprintf(p + len, "status:\t\tunknown\n");
4308 len += sprintf(p + len, "commands:\ton, off\n");
4309 } else {
4310 status = light_get_status();
4311 if (status < 0)
4312 return status;
4313 len += sprintf(p + len, "status:\t\t%s\n", onoff(status, 0));
4314 len += sprintf(p + len, "commands:\ton, off\n");
4315 }
4316
4317 return len;
4318 }
4319
4320 static int light_write(char *buf)
4321 {
4322 char *cmd;
4323 int newstatus = 0;
4324
4325 if (!tp_features.light)
4326 return -ENODEV;
4327
4328 while ((cmd = next_cmd(&buf))) {
4329 if (strlencmp(cmd, "on") == 0) {
4330 newstatus = 1;
4331 } else if (strlencmp(cmd, "off") == 0) {
4332 newstatus = 0;
4333 } else
4334 return -EINVAL;
4335 }
4336
4337 return light_set_status(newstatus);
4338 }
4339
4340 static struct ibm_struct light_driver_data = {
4341 .name = "light",
4342 .read = light_read,
4343 .write = light_write,
4344 .exit = light_exit,
4345 };
4346
4347 /*************************************************************************
4348 * Dock subdriver
4349 */
4350
4351 #ifdef CONFIG_THINKPAD_ACPI_DOCK
4352
4353 static void dock_notify(struct ibm_struct *ibm, u32 event);
4354 static int dock_read(char *p);
4355 static int dock_write(char *buf);
4356
4357 TPACPI_HANDLE(dock, root, "\\_SB.GDCK", /* X30, X31, X40 */
4358 "\\_SB.PCI0.DOCK", /* 600e/x,770e,770x,A2xm/p,T20-22,X20-21 */
4359 "\\_SB.PCI0.PCI1.DOCK", /* all others */
4360 "\\_SB.PCI.ISA.SLCE", /* 570 */
4361 ); /* A21e,G4x,R30,R31,R32,R40,R40e,R50e */
4362
4363 /* don't list other alternatives as we install a notify handler on the 570 */
4364 TPACPI_HANDLE(pci, root, "\\_SB.PCI"); /* 570 */
4365
4366 static const struct acpi_device_id ibm_pci_device_ids[] = {
4367 {PCI_ROOT_HID_STRING, 0},
4368 {"", 0},
4369 };
4370
4371 static struct tp_acpi_drv_struct ibm_dock_acpidriver[2] = {
4372 {
4373 .notify = dock_notify,
4374 .handle = &dock_handle,
4375 .type = ACPI_SYSTEM_NOTIFY,
4376 },
4377 {
4378 /* THIS ONE MUST NEVER BE USED FOR DRIVER AUTOLOADING.
4379 * We just use it to get notifications of dock hotplug
4380 * in very old thinkpads */
4381 .hid = ibm_pci_device_ids,
4382 .notify = dock_notify,
4383 .handle = &pci_handle,
4384 .type = ACPI_SYSTEM_NOTIFY,
4385 },
4386 };
4387
4388 static struct ibm_struct dock_driver_data[2] = {
4389 {
4390 .name = "dock",
4391 .read = dock_read,
4392 .write = dock_write,
4393 .acpi = &ibm_dock_acpidriver[0],
4394 },
4395 {
4396 .name = "dock",
4397 .acpi = &ibm_dock_acpidriver[1],
4398 },
4399 };
4400
4401 #define dock_docked() (_sta(dock_handle) & 1)
4402
4403 static int __init dock_init(struct ibm_init_struct *iibm)
4404 {
4405 vdbg_printk(TPACPI_DBG_INIT, "initializing dock subdriver\n");
4406
4407 TPACPI_ACPIHANDLE_INIT(dock);
4408
4409 vdbg_printk(TPACPI_DBG_INIT, "dock is %s\n",
4410 str_supported(dock_handle != NULL));
4411
4412 return (dock_handle)? 0 : 1;
4413 }
4414
4415 static int __init dock_init2(struct ibm_init_struct *iibm)
4416 {
4417 int dock2_needed;
4418
4419 vdbg_printk(TPACPI_DBG_INIT, "initializing dock subdriver part 2\n");
4420
4421 if (dock_driver_data[0].flags.acpi_driver_registered &&
4422 dock_driver_data[0].flags.acpi_notify_installed) {
4423 TPACPI_ACPIHANDLE_INIT(pci);
4424 dock2_needed = (pci_handle != NULL);
4425 vdbg_printk(TPACPI_DBG_INIT,
4426 "dock PCI handler for the TP 570 is %s\n",
4427 str_supported(dock2_needed));
4428 } else {
4429 vdbg_printk(TPACPI_DBG_INIT,
4430 "dock subdriver part 2 not required\n");
4431 dock2_needed = 0;
4432 }
4433
4434 return (dock2_needed)? 0 : 1;
4435 }
4436
4437 static void dock_notify(struct ibm_struct *ibm, u32 event)
4438 {
4439 int docked = dock_docked();
4440 int pci = ibm->acpi->hid && ibm->acpi->device &&
4441 acpi_match_device_ids(ibm->acpi->device, ibm_pci_device_ids);
4442 int data;
4443
4444 if (event == 1 && !pci) /* 570 */
4445 data = 1; /* button */
4446 else if (event == 1 && pci) /* 570 */
4447 data = 3; /* dock */
4448 else if (event == 3 && docked)
4449 data = 1; /* button */
4450 else if (event == 3 && !docked)
4451 data = 2; /* undock */
4452 else if (event == 0 && docked)
4453 data = 3; /* dock */
4454 else {
4455 printk(TPACPI_ERR "unknown dock event %d, status %d\n",
4456 event, _sta(dock_handle));
4457 data = 0; /* unknown */
4458 }
4459 acpi_bus_generate_proc_event(ibm->acpi->device, event, data);
4460 acpi_bus_generate_netlink_event(ibm->acpi->device->pnp.device_class,
4461 dev_name(&ibm->acpi->device->dev),
4462 event, data);
4463 }
4464
4465 static int dock_read(char *p)
4466 {
4467 int len = 0;
4468 int docked = dock_docked();
4469
4470 if (!dock_handle)
4471 len += sprintf(p + len, "status:\t\tnot supported\n");
4472 else if (!docked)
4473 len += sprintf(p + len, "status:\t\tundocked\n");
4474 else {
4475 len += sprintf(p + len, "status:\t\tdocked\n");
4476 len += sprintf(p + len, "commands:\tdock, undock\n");
4477 }
4478
4479 return len;
4480 }
4481
4482 static int dock_write(char *buf)
4483 {
4484 char *cmd;
4485
4486 if (!dock_docked())
4487 return -ENODEV;
4488
4489 while ((cmd = next_cmd(&buf))) {
4490 if (strlencmp(cmd, "undock") == 0) {
4491 if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 0) ||
4492 !acpi_evalf(dock_handle, NULL, "_EJ0", "vd", 1))
4493 return -EIO;
4494 } else if (strlencmp(cmd, "dock") == 0) {
4495 if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 1))
4496 return -EIO;
4497 } else
4498 return -EINVAL;
4499 }
4500
4501 return 0;
4502 }
4503
4504 #endif /* CONFIG_THINKPAD_ACPI_DOCK */
4505
4506 /*************************************************************************
4507 * Bay subdriver
4508 */
4509
4510 #ifdef CONFIG_THINKPAD_ACPI_BAY
4511
4512 TPACPI_HANDLE(bay, root, "\\_SB.PCI.IDE.SECN.MAST", /* 570 */
4513 "\\_SB.PCI0.IDE0.IDES.IDSM", /* 600e/x, 770e, 770x */
4514 "\\_SB.PCI0.SATA.SCND.MSTR", /* T60, X60, Z60 */
4515 "\\_SB.PCI0.IDE0.SCND.MSTR", /* all others */
4516 ); /* A21e, R30, R31 */
4517 TPACPI_HANDLE(bay_ej, bay, "_EJ3", /* 600e/x, A2xm/p, A3x */
4518 "_EJ0", /* all others */
4519 ); /* 570,A21e,G4x,R30,R31,R32,R40e,R50e */
4520 TPACPI_HANDLE(bay2, root, "\\_SB.PCI0.IDE0.PRIM.SLAV", /* A3x, R32 */
4521 "\\_SB.PCI0.IDE0.IDEP.IDPS", /* 600e/x, 770e, 770x */
4522 ); /* all others */
4523 TPACPI_HANDLE(bay2_ej, bay2, "_EJ3", /* 600e/x, 770e, A3x */
4524 "_EJ0", /* 770x */
4525 ); /* all others */
4526
4527 static int __init bay_init(struct ibm_init_struct *iibm)
4528 {
4529 vdbg_printk(TPACPI_DBG_INIT, "initializing bay subdriver\n");
4530
4531 TPACPI_ACPIHANDLE_INIT(bay);
4532 if (bay_handle)
4533 TPACPI_ACPIHANDLE_INIT(bay_ej);
4534 TPACPI_ACPIHANDLE_INIT(bay2);
4535 if (bay2_handle)
4536 TPACPI_ACPIHANDLE_INIT(bay2_ej);
4537
4538 tp_features.bay_status = bay_handle &&
4539 acpi_evalf(bay_handle, NULL, "_STA", "qv");
4540 tp_features.bay_status2 = bay2_handle &&
4541 acpi_evalf(bay2_handle, NULL, "_STA", "qv");
4542
4543 tp_features.bay_eject = bay_handle && bay_ej_handle &&
4544 (strlencmp(bay_ej_path, "_EJ0") == 0 || experimental);
4545 tp_features.bay_eject2 = bay2_handle && bay2_ej_handle &&
4546 (strlencmp(bay2_ej_path, "_EJ0") == 0 || experimental);
4547
4548 vdbg_printk(TPACPI_DBG_INIT,
4549 "bay 1: status %s, eject %s; bay 2: status %s, eject %s\n",
4550 str_supported(tp_features.bay_status),
4551 str_supported(tp_features.bay_eject),
4552 str_supported(tp_features.bay_status2),
4553 str_supported(tp_features.bay_eject2));
4554
4555 return (tp_features.bay_status || tp_features.bay_eject ||
4556 tp_features.bay_status2 || tp_features.bay_eject2)? 0 : 1;
4557 }
4558
4559 static void bay_notify(struct ibm_struct *ibm, u32 event)
4560 {
4561 acpi_bus_generate_proc_event(ibm->acpi->device, event, 0);
4562 acpi_bus_generate_netlink_event(ibm->acpi->device->pnp.device_class,
4563 dev_name(&ibm->acpi->device->dev),
4564 event, 0);
4565 }
4566
4567 #define bay_occupied(b) (_sta(b##_handle) & 1)
4568
4569 static int bay_read(char *p)
4570 {
4571 int len = 0;
4572 int occupied = bay_occupied(bay);
4573 int occupied2 = bay_occupied(bay2);
4574 int eject, eject2;
4575
4576 len += sprintf(p + len, "status:\t\t%s\n",
4577 tp_features.bay_status ?
4578 (occupied ? "occupied" : "unoccupied") :
4579 "not supported");
4580 if (tp_features.bay_status2)
4581 len += sprintf(p + len, "status2:\t%s\n", occupied2 ?
4582 "occupied" : "unoccupied");
4583
4584 eject = tp_features.bay_eject && occupied;
4585 eject2 = tp_features.bay_eject2 && occupied2;
4586
4587 if (eject && eject2)
4588 len += sprintf(p + len, "commands:\teject, eject2\n");
4589 else if (eject)
4590 len += sprintf(p + len, "commands:\teject\n");
4591 else if (eject2)
4592 len += sprintf(p + len, "commands:\teject2\n");
4593
4594 return len;
4595 }
4596
4597 static int bay_write(char *buf)
4598 {
4599 char *cmd;
4600
4601 if (!tp_features.bay_eject && !tp_features.bay_eject2)
4602 return -ENODEV;
4603
4604 while ((cmd = next_cmd(&buf))) {
4605 if (tp_features.bay_eject && strlencmp(cmd, "eject") == 0) {
4606 if (!acpi_evalf(bay_ej_handle, NULL, NULL, "vd", 1))
4607 return -EIO;
4608 } else if (tp_features.bay_eject2 &&
4609 strlencmp(cmd, "eject2") == 0) {
4610 if (!acpi_evalf(bay2_ej_handle, NULL, NULL, "vd", 1))
4611 return -EIO;
4612 } else
4613 return -EINVAL;
4614 }
4615
4616 return 0;
4617 }
4618
4619 static struct tp_acpi_drv_struct ibm_bay_acpidriver = {
4620 .notify = bay_notify,
4621 .handle = &bay_handle,
4622 .type = ACPI_SYSTEM_NOTIFY,
4623 };
4624
4625 static struct ibm_struct bay_driver_data = {
4626 .name = "bay",
4627 .read = bay_read,
4628 .write = bay_write,
4629 .acpi = &ibm_bay_acpidriver,
4630 };
4631
4632 #endif /* CONFIG_THINKPAD_ACPI_BAY */
4633
4634 /*************************************************************************
4635 * CMOS subdriver
4636 */
4637
4638 /* sysfs cmos_command -------------------------------------------------- */
4639 static ssize_t cmos_command_store(struct device *dev,
4640 struct device_attribute *attr,
4641 const char *buf, size_t count)
4642 {
4643 unsigned long cmos_cmd;
4644 int res;
4645
4646 if (parse_strtoul(buf, 21, &cmos_cmd))
4647 return -EINVAL;
4648
4649 res = issue_thinkpad_cmos_command(cmos_cmd);
4650 return (res)? res : count;
4651 }
4652
4653 static struct device_attribute dev_attr_cmos_command =
4654 __ATTR(cmos_command, S_IWUSR, NULL, cmos_command_store);
4655
4656 /* --------------------------------------------------------------------- */
4657
4658 static int __init cmos_init(struct ibm_init_struct *iibm)
4659 {
4660 int res;
4661
4662 vdbg_printk(TPACPI_DBG_INIT,
4663 "initializing cmos commands subdriver\n");
4664
4665 TPACPI_ACPIHANDLE_INIT(cmos);
4666
4667 vdbg_printk(TPACPI_DBG_INIT, "cmos commands are %s\n",
4668 str_supported(cmos_handle != NULL));
4669
4670 res = device_create_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
4671 if (res)
4672 return res;
4673
4674 return (cmos_handle)? 0 : 1;
4675 }
4676
4677 static void cmos_exit(void)
4678 {
4679 device_remove_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
4680 }
4681
4682 static int cmos_read(char *p)
4683 {
4684 int len = 0;
4685
4686 /* cmos not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
4687 R30, R31, T20-22, X20-21 */
4688 if (!cmos_handle)
4689 len += sprintf(p + len, "status:\t\tnot supported\n");
4690 else {
4691 len += sprintf(p + len, "status:\t\tsupported\n");
4692 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-21)\n");
4693 }
4694
4695 return len;
4696 }
4697
4698 static int cmos_write(char *buf)
4699 {
4700 char *cmd;
4701 int cmos_cmd, res;
4702
4703 while ((cmd = next_cmd(&buf))) {
4704 if (sscanf(cmd, "%u", &cmos_cmd) == 1 &&
4705 cmos_cmd >= 0 && cmos_cmd <= 21) {
4706 /* cmos_cmd set */
4707 } else
4708 return -EINVAL;
4709
4710 res = issue_thinkpad_cmos_command(cmos_cmd);
4711 if (res)
4712 return res;
4713 }
4714
4715 return 0;
4716 }
4717
4718 static struct ibm_struct cmos_driver_data = {
4719 .name = "cmos",
4720 .read = cmos_read,
4721 .write = cmos_write,
4722 .exit = cmos_exit,
4723 };
4724
4725 /*************************************************************************
4726 * LED subdriver
4727 */
4728
4729 enum led_access_mode {
4730 TPACPI_LED_NONE = 0,
4731 TPACPI_LED_570, /* 570 */
4732 TPACPI_LED_OLD, /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
4733 TPACPI_LED_NEW, /* all others */
4734 };
4735
4736 enum { /* For TPACPI_LED_OLD */
4737 TPACPI_LED_EC_HLCL = 0x0c, /* EC reg to get led to power on */
4738 TPACPI_LED_EC_HLBL = 0x0d, /* EC reg to blink a lit led */
4739 TPACPI_LED_EC_HLMS = 0x0e, /* EC reg to select led to command */
4740 };
4741
4742 static enum led_access_mode led_supported;
4743
4744 TPACPI_HANDLE(led, ec, "SLED", /* 570 */
4745 "SYSL", /* 600e/x, 770e, 770x, A21e, A2xm/p, */
4746 /* T20-22, X20-21 */
4747 "LED", /* all others */
4748 ); /* R30, R31 */
4749
4750 #define TPACPI_LED_NUMLEDS 8
4751 static struct tpacpi_led_classdev *tpacpi_leds;
4752 static enum led_status_t tpacpi_led_state_cache[TPACPI_LED_NUMLEDS];
4753 static const char * const tpacpi_led_names[TPACPI_LED_NUMLEDS] = {
4754 /* there's a limit of 19 chars + NULL before 2.6.26 */
4755 "tpacpi::power",
4756 "tpacpi:orange:batt",
4757 "tpacpi:green:batt",
4758 "tpacpi::dock_active",
4759 "tpacpi::bay_active",
4760 "tpacpi::dock_batt",
4761 "tpacpi::unknown_led",
4762 "tpacpi::standby",
4763 };
4764 #define TPACPI_SAFE_LEDS 0x0081U
4765
4766 static inline bool tpacpi_is_led_restricted(const unsigned int led)
4767 {
4768 #ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS
4769 return false;
4770 #else
4771 return (TPACPI_SAFE_LEDS & (1 << led)) == 0;
4772 #endif
4773 }
4774
4775 static int led_get_status(const unsigned int led)
4776 {
4777 int status;
4778 enum led_status_t led_s;
4779
4780 switch (led_supported) {
4781 case TPACPI_LED_570:
4782 if (!acpi_evalf(ec_handle,
4783 &status, "GLED", "dd", 1 << led))
4784 return -EIO;
4785 led_s = (status == 0)?
4786 TPACPI_LED_OFF :
4787 ((status == 1)?
4788 TPACPI_LED_ON :
4789 TPACPI_LED_BLINK);
4790 tpacpi_led_state_cache[led] = led_s;
4791 return led_s;
4792 default:
4793 return -ENXIO;
4794 }
4795
4796 /* not reached */
4797 }
4798
4799 static int led_set_status(const unsigned int led,
4800 const enum led_status_t ledstatus)
4801 {
4802 /* off, on, blink. Index is led_status_t */
4803 static const unsigned int led_sled_arg1[] = { 0, 1, 3 };
4804 static const unsigned int led_led_arg1[] = { 0, 0x80, 0xc0 };
4805
4806 int rc = 0;
4807
4808 switch (led_supported) {
4809 case TPACPI_LED_570:
4810 /* 570 */
4811 if (unlikely(led > 7))
4812 return -EINVAL;
4813 if (unlikely(tpacpi_is_led_restricted(led)))
4814 return -EPERM;
4815 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
4816 (1 << led), led_sled_arg1[ledstatus]))
4817 rc = -EIO;
4818 break;
4819 case TPACPI_LED_OLD:
4820 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */
4821 if (unlikely(led > 7))
4822 return -EINVAL;
4823 if (unlikely(tpacpi_is_led_restricted(led)))
4824 return -EPERM;
4825 rc = ec_write(TPACPI_LED_EC_HLMS, (1 << led));
4826 if (rc >= 0)
4827 rc = ec_write(TPACPI_LED_EC_HLBL,
4828 (ledstatus == TPACPI_LED_BLINK) << led);
4829 if (rc >= 0)
4830 rc = ec_write(TPACPI_LED_EC_HLCL,
4831 (ledstatus != TPACPI_LED_OFF) << led);
4832 break;
4833 case TPACPI_LED_NEW:
4834 /* all others */
4835 if (unlikely(led >= TPACPI_LED_NUMLEDS))
4836 return -EINVAL;
4837 if (unlikely(tpacpi_is_led_restricted(led)))
4838 return -EPERM;
4839 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
4840 led, led_led_arg1[ledstatus]))
4841 rc = -EIO;
4842 break;
4843 default:
4844 rc = -ENXIO;
4845 }
4846
4847 if (!rc)
4848 tpacpi_led_state_cache[led] = ledstatus;
4849
4850 return rc;
4851 }
4852
4853 static void led_set_status_worker(struct work_struct *work)
4854 {
4855 struct tpacpi_led_classdev *data =
4856 container_of(work, struct tpacpi_led_classdev, work);
4857
4858 if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING))
4859 led_set_status(data->led, data->new_state);
4860 }
4861
4862 static void led_sysfs_set(struct led_classdev *led_cdev,
4863 enum led_brightness brightness)
4864 {
4865 struct tpacpi_led_classdev *data = container_of(led_cdev,
4866 struct tpacpi_led_classdev, led_classdev);
4867
4868 if (brightness == LED_OFF)
4869 data->new_state = TPACPI_LED_OFF;
4870 else if (tpacpi_led_state_cache[data->led] != TPACPI_LED_BLINK)
4871 data->new_state = TPACPI_LED_ON;
4872 else
4873 data->new_state = TPACPI_LED_BLINK;
4874
4875 queue_work(tpacpi_wq, &data->work);
4876 }
4877
4878 static int led_sysfs_blink_set(struct led_classdev *led_cdev,
4879 unsigned long *delay_on, unsigned long *delay_off)
4880 {
4881 struct tpacpi_led_classdev *data = container_of(led_cdev,
4882 struct tpacpi_led_classdev, led_classdev);
4883
4884 /* Can we choose the flash rate? */
4885 if (*delay_on == 0 && *delay_off == 0) {
4886 /* yes. set them to the hardware blink rate (1 Hz) */
4887 *delay_on = 500; /* ms */
4888 *delay_off = 500; /* ms */
4889 } else if ((*delay_on != 500) || (*delay_off != 500))
4890 return -EINVAL;
4891
4892 data->new_state = TPACPI_LED_BLINK;
4893 queue_work(tpacpi_wq, &data->work);
4894
4895 return 0;
4896 }
4897
4898 static enum led_brightness led_sysfs_get(struct led_classdev *led_cdev)
4899 {
4900 int rc;
4901
4902 struct tpacpi_led_classdev *data = container_of(led_cdev,
4903 struct tpacpi_led_classdev, led_classdev);
4904
4905 rc = led_get_status(data->led);
4906
4907 if (rc == TPACPI_LED_OFF || rc < 0)
4908 rc = LED_OFF; /* no error handling in led class :( */
4909 else
4910 rc = LED_FULL;
4911
4912 return rc;
4913 }
4914
4915 static void led_exit(void)
4916 {
4917 unsigned int i;
4918
4919 for (i = 0; i < TPACPI_LED_NUMLEDS; i++) {
4920 if (tpacpi_leds[i].led_classdev.name)
4921 led_classdev_unregister(&tpacpi_leds[i].led_classdev);
4922 }
4923
4924 kfree(tpacpi_leds);
4925 }
4926
4927 static int __init tpacpi_init_led(unsigned int led)
4928 {
4929 int rc;
4930
4931 tpacpi_leds[led].led = led;
4932
4933 tpacpi_leds[led].led_classdev.brightness_set = &led_sysfs_set;
4934 tpacpi_leds[led].led_classdev.blink_set = &led_sysfs_blink_set;
4935 if (led_supported == TPACPI_LED_570)
4936 tpacpi_leds[led].led_classdev.brightness_get =
4937 &led_sysfs_get;
4938
4939 tpacpi_leds[led].led_classdev.name = tpacpi_led_names[led];
4940
4941 INIT_WORK(&tpacpi_leds[led].work, led_set_status_worker);
4942
4943 rc = led_classdev_register(&tpacpi_pdev->dev,
4944 &tpacpi_leds[led].led_classdev);
4945 if (rc < 0)
4946 tpacpi_leds[led].led_classdev.name = NULL;
4947
4948 return rc;
4949 }
4950
4951 static int __init led_init(struct ibm_init_struct *iibm)
4952 {
4953 unsigned int i;
4954 int rc;
4955
4956 vdbg_printk(TPACPI_DBG_INIT, "initializing LED subdriver\n");
4957
4958 TPACPI_ACPIHANDLE_INIT(led);
4959
4960 if (!led_handle)
4961 /* led not supported on R30, R31 */
4962 led_supported = TPACPI_LED_NONE;
4963 else if (strlencmp(led_path, "SLED") == 0)
4964 /* 570 */
4965 led_supported = TPACPI_LED_570;
4966 else if (strlencmp(led_path, "SYSL") == 0)
4967 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
4968 led_supported = TPACPI_LED_OLD;
4969 else
4970 /* all others */
4971 led_supported = TPACPI_LED_NEW;
4972
4973 vdbg_printk(TPACPI_DBG_INIT, "LED commands are %s, mode %d\n",
4974 str_supported(led_supported), led_supported);
4975
4976 tpacpi_leds = kzalloc(sizeof(*tpacpi_leds) * TPACPI_LED_NUMLEDS,
4977 GFP_KERNEL);
4978 if (!tpacpi_leds) {
4979 printk(TPACPI_ERR "Out of memory for LED data\n");
4980 return -ENOMEM;
4981 }
4982
4983 for (i = 0; i < TPACPI_LED_NUMLEDS; i++) {
4984 if (!tpacpi_is_led_restricted(i)) {
4985 rc = tpacpi_init_led(i);
4986 if (rc < 0) {
4987 led_exit();
4988 return rc;
4989 }
4990 }
4991 }
4992
4993 #ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS
4994 if (led_supported != TPACPI_LED_NONE)
4995 printk(TPACPI_NOTICE
4996 "warning: userspace override of important "
4997 "firmware LEDs is enabled\n");
4998 #endif
4999 return (led_supported != TPACPI_LED_NONE)? 0 : 1;
5000 }
5001
5002 #define str_led_status(s) \
5003 ((s) == TPACPI_LED_OFF ? "off" : \
5004 ((s) == TPACPI_LED_ON ? "on" : "blinking"))
5005
5006 static int led_read(char *p)
5007 {
5008 int len = 0;
5009
5010 if (!led_supported) {
5011 len += sprintf(p + len, "status:\t\tnot supported\n");
5012 return len;
5013 }
5014 len += sprintf(p + len, "status:\t\tsupported\n");
5015
5016 if (led_supported == TPACPI_LED_570) {
5017 /* 570 */
5018 int i, status;
5019 for (i = 0; i < 8; i++) {
5020 status = led_get_status(i);
5021 if (status < 0)
5022 return -EIO;
5023 len += sprintf(p + len, "%d:\t\t%s\n",
5024 i, str_led_status(status));
5025 }
5026 }
5027
5028 len += sprintf(p + len, "commands:\t"
5029 "<led> on, <led> off, <led> blink (<led> is 0-7)\n");
5030
5031 return len;
5032 }
5033
5034 static int led_write(char *buf)
5035 {
5036 char *cmd;
5037 int led, rc;
5038 enum led_status_t s;
5039
5040 if (!led_supported)
5041 return -ENODEV;
5042
5043 while ((cmd = next_cmd(&buf))) {
5044 if (sscanf(cmd, "%d", &led) != 1 || led < 0 || led > 7)
5045 return -EINVAL;
5046
5047 if (strstr(cmd, "off")) {
5048 s = TPACPI_LED_OFF;
5049 } else if (strstr(cmd, "on")) {
5050 s = TPACPI_LED_ON;
5051 } else if (strstr(cmd, "blink")) {
5052 s = TPACPI_LED_BLINK;
5053 } else {
5054 return -EINVAL;
5055 }
5056
5057 rc = led_set_status(led, s);
5058 if (rc < 0)
5059 return rc;
5060 }
5061
5062 return 0;
5063 }
5064
5065 static struct ibm_struct led_driver_data = {
5066 .name = "led",
5067 .read = led_read,
5068 .write = led_write,
5069 .exit = led_exit,
5070 };
5071
5072 /*************************************************************************
5073 * Beep subdriver
5074 */
5075
5076 TPACPI_HANDLE(beep, ec, "BEEP"); /* all except R30, R31 */
5077
5078 static int __init beep_init(struct ibm_init_struct *iibm)
5079 {
5080 vdbg_printk(TPACPI_DBG_INIT, "initializing beep subdriver\n");
5081
5082 TPACPI_ACPIHANDLE_INIT(beep);
5083
5084 vdbg_printk(TPACPI_DBG_INIT, "beep is %s\n",
5085 str_supported(beep_handle != NULL));
5086
5087 return (beep_handle)? 0 : 1;
5088 }
5089
5090 static int beep_read(char *p)
5091 {
5092 int len = 0;
5093
5094 if (!beep_handle)
5095 len += sprintf(p + len, "status:\t\tnot supported\n");
5096 else {
5097 len += sprintf(p + len, "status:\t\tsupported\n");
5098 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-17)\n");
5099 }
5100
5101 return len;
5102 }
5103
5104 static int beep_write(char *buf)
5105 {
5106 char *cmd;
5107 int beep_cmd;
5108
5109 if (!beep_handle)
5110 return -ENODEV;
5111
5112 while ((cmd = next_cmd(&buf))) {
5113 if (sscanf(cmd, "%u", &beep_cmd) == 1 &&
5114 beep_cmd >= 0 && beep_cmd <= 17) {
5115 /* beep_cmd set */
5116 } else
5117 return -EINVAL;
5118 if (!acpi_evalf(beep_handle, NULL, NULL, "vdd", beep_cmd, 0))
5119 return -EIO;
5120 }
5121
5122 return 0;
5123 }
5124
5125 static struct ibm_struct beep_driver_data = {
5126 .name = "beep",
5127 .read = beep_read,
5128 .write = beep_write,
5129 };
5130
5131 /*************************************************************************
5132 * Thermal subdriver
5133 */
5134
5135 enum thermal_access_mode {
5136 TPACPI_THERMAL_NONE = 0, /* No thermal support */
5137 TPACPI_THERMAL_ACPI_TMP07, /* Use ACPI TMP0-7 */
5138 TPACPI_THERMAL_ACPI_UPDT, /* Use ACPI TMP0-7 with UPDT */
5139 TPACPI_THERMAL_TPEC_8, /* Use ACPI EC regs, 8 sensors */
5140 TPACPI_THERMAL_TPEC_16, /* Use ACPI EC regs, 16 sensors */
5141 };
5142
5143 enum { /* TPACPI_THERMAL_TPEC_* */
5144 TP_EC_THERMAL_TMP0 = 0x78, /* ACPI EC regs TMP 0..7 */
5145 TP_EC_THERMAL_TMP8 = 0xC0, /* ACPI EC regs TMP 8..15 */
5146 TP_EC_THERMAL_TMP_NA = -128, /* ACPI EC sensor not available */
5147 };
5148
5149 #define TPACPI_MAX_THERMAL_SENSORS 16 /* Max thermal sensors supported */
5150 struct ibm_thermal_sensors_struct {
5151 s32 temp[TPACPI_MAX_THERMAL_SENSORS];
5152 };
5153
5154 static enum thermal_access_mode thermal_read_mode;
5155
5156 /* idx is zero-based */
5157 static int thermal_get_sensor(int idx, s32 *value)
5158 {
5159 int t;
5160 s8 tmp;
5161 char tmpi[5];
5162
5163 t = TP_EC_THERMAL_TMP0;
5164
5165 switch (thermal_read_mode) {
5166 #if TPACPI_MAX_THERMAL_SENSORS >= 16
5167 case TPACPI_THERMAL_TPEC_16:
5168 if (idx >= 8 && idx <= 15) {
5169 t = TP_EC_THERMAL_TMP8;
5170 idx -= 8;
5171 }
5172 /* fallthrough */
5173 #endif
5174 case TPACPI_THERMAL_TPEC_8:
5175 if (idx <= 7) {
5176 if (!acpi_ec_read(t + idx, &tmp))
5177 return -EIO;
5178 *value = tmp * 1000;
5179 return 0;
5180 }
5181 break;
5182
5183 case TPACPI_THERMAL_ACPI_UPDT:
5184 if (idx <= 7) {
5185 snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
5186 if (!acpi_evalf(ec_handle, NULL, "UPDT", "v"))
5187 return -EIO;
5188 if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
5189 return -EIO;
5190 *value = (t - 2732) * 100;
5191 return 0;
5192 }
5193 break;
5194
5195 case TPACPI_THERMAL_ACPI_TMP07:
5196 if (idx <= 7) {
5197 snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
5198 if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
5199 return -EIO;
5200 if (t > 127 || t < -127)
5201 t = TP_EC_THERMAL_TMP_NA;
5202 *value = t * 1000;
5203 return 0;
5204 }
5205 break;
5206
5207 case TPACPI_THERMAL_NONE:
5208 default:
5209 return -ENOSYS;
5210 }
5211
5212 return -EINVAL;
5213 }
5214
5215 static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s)
5216 {
5217 int res, i;
5218 int n;
5219
5220 n = 8;
5221 i = 0;
5222
5223 if (!s)
5224 return -EINVAL;
5225
5226 if (thermal_read_mode == TPACPI_THERMAL_TPEC_16)
5227 n = 16;
5228
5229 for (i = 0 ; i < n; i++) {
5230 res = thermal_get_sensor(i, &s->temp[i]);
5231 if (res)
5232 return res;
5233 }
5234
5235 return n;
5236 }
5237
5238 /* sysfs temp##_input -------------------------------------------------- */
5239
5240 static ssize_t thermal_temp_input_show(struct device *dev,
5241 struct device_attribute *attr,
5242 char *buf)
5243 {
5244 struct sensor_device_attribute *sensor_attr =
5245 to_sensor_dev_attr(attr);
5246 int idx = sensor_attr->index;
5247 s32 value;
5248 int res;
5249
5250 res = thermal_get_sensor(idx, &value);
5251 if (res)
5252 return res;
5253 if (value == TP_EC_THERMAL_TMP_NA * 1000)
5254 return -ENXIO;
5255
5256 return snprintf(buf, PAGE_SIZE, "%d\n", value);
5257 }
5258
5259 #define THERMAL_SENSOR_ATTR_TEMP(_idxA, _idxB) \
5260 SENSOR_ATTR(temp##_idxA##_input, S_IRUGO, \
5261 thermal_temp_input_show, NULL, _idxB)
5262
5263 static struct sensor_device_attribute sensor_dev_attr_thermal_temp_input[] = {
5264 THERMAL_SENSOR_ATTR_TEMP(1, 0),
5265 THERMAL_SENSOR_ATTR_TEMP(2, 1),
5266 THERMAL_SENSOR_ATTR_TEMP(3, 2),
5267 THERMAL_SENSOR_ATTR_TEMP(4, 3),
5268 THERMAL_SENSOR_ATTR_TEMP(5, 4),
5269 THERMAL_SENSOR_ATTR_TEMP(6, 5),
5270 THERMAL_SENSOR_ATTR_TEMP(7, 6),
5271 THERMAL_SENSOR_ATTR_TEMP(8, 7),
5272 THERMAL_SENSOR_ATTR_TEMP(9, 8),
5273 THERMAL_SENSOR_ATTR_TEMP(10, 9),
5274 THERMAL_SENSOR_ATTR_TEMP(11, 10),
5275 THERMAL_SENSOR_ATTR_TEMP(12, 11),
5276 THERMAL_SENSOR_ATTR_TEMP(13, 12),
5277 THERMAL_SENSOR_ATTR_TEMP(14, 13),
5278 THERMAL_SENSOR_ATTR_TEMP(15, 14),
5279 THERMAL_SENSOR_ATTR_TEMP(16, 15),
5280 };
5281
5282 #define THERMAL_ATTRS(X) \
5283 &sensor_dev_attr_thermal_temp_input[X].dev_attr.attr
5284
5285 static struct attribute *thermal_temp_input_attr[] = {
5286 THERMAL_ATTRS(8),
5287 THERMAL_ATTRS(9),
5288 THERMAL_ATTRS(10),
5289 THERMAL_ATTRS(11),
5290 THERMAL_ATTRS(12),
5291 THERMAL_ATTRS(13),
5292 THERMAL_ATTRS(14),
5293 THERMAL_ATTRS(15),
5294 THERMAL_ATTRS(0),
5295 THERMAL_ATTRS(1),
5296 THERMAL_ATTRS(2),
5297 THERMAL_ATTRS(3),
5298 THERMAL_ATTRS(4),
5299 THERMAL_ATTRS(5),
5300 THERMAL_ATTRS(6),
5301 THERMAL_ATTRS(7),
5302 NULL
5303 };
5304
5305 static const struct attribute_group thermal_temp_input16_group = {
5306 .attrs = thermal_temp_input_attr
5307 };
5308
5309 static const struct attribute_group thermal_temp_input8_group = {
5310 .attrs = &thermal_temp_input_attr[8]
5311 };
5312
5313 #undef THERMAL_SENSOR_ATTR_TEMP
5314 #undef THERMAL_ATTRS
5315
5316 /* --------------------------------------------------------------------- */
5317
5318 static int __init thermal_init(struct ibm_init_struct *iibm)
5319 {
5320 u8 t, ta1, ta2;
5321 int i;
5322 int acpi_tmp7;
5323 int res;
5324
5325 vdbg_printk(TPACPI_DBG_INIT, "initializing thermal subdriver\n");
5326
5327 acpi_tmp7 = acpi_evalf(ec_handle, NULL, "TMP7", "qv");
5328
5329 if (thinkpad_id.ec_model) {
5330 /*
5331 * Direct EC access mode: sensors at registers
5332 * 0x78-0x7F, 0xC0-0xC7. Registers return 0x00 for
5333 * non-implemented, thermal sensors return 0x80 when
5334 * not available
5335 */
5336
5337 ta1 = ta2 = 0;
5338 for (i = 0; i < 8; i++) {
5339 if (acpi_ec_read(TP_EC_THERMAL_TMP0 + i, &t)) {
5340 ta1 |= t;
5341 } else {
5342 ta1 = 0;
5343 break;
5344 }
5345 if (acpi_ec_read(TP_EC_THERMAL_TMP8 + i, &t)) {
5346 ta2 |= t;
5347 } else {
5348 ta1 = 0;
5349 break;
5350 }
5351 }
5352 if (ta1 == 0) {
5353 /* This is sheer paranoia, but we handle it anyway */
5354 if (acpi_tmp7) {
5355 printk(TPACPI_ERR
5356 "ThinkPad ACPI EC access misbehaving, "
5357 "falling back to ACPI TMPx access "
5358 "mode\n");
5359 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
5360 } else {
5361 printk(TPACPI_ERR
5362 "ThinkPad ACPI EC access misbehaving, "
5363 "disabling thermal sensors access\n");
5364 thermal_read_mode = TPACPI_THERMAL_NONE;
5365 }
5366 } else {
5367 thermal_read_mode =
5368 (ta2 != 0) ?
5369 TPACPI_THERMAL_TPEC_16 : TPACPI_THERMAL_TPEC_8;
5370 }
5371 } else if (acpi_tmp7) {
5372 if (acpi_evalf(ec_handle, NULL, "UPDT", "qv")) {
5373 /* 600e/x, 770e, 770x */
5374 thermal_read_mode = TPACPI_THERMAL_ACPI_UPDT;
5375 } else {
5376 /* Standard ACPI TMPx access, max 8 sensors */
5377 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
5378 }
5379 } else {
5380 /* temperatures not supported on 570, G4x, R30, R31, R32 */
5381 thermal_read_mode = TPACPI_THERMAL_NONE;
5382 }
5383
5384 vdbg_printk(TPACPI_DBG_INIT, "thermal is %s, mode %d\n",
5385 str_supported(thermal_read_mode != TPACPI_THERMAL_NONE),
5386 thermal_read_mode);
5387
5388 switch (thermal_read_mode) {
5389 case TPACPI_THERMAL_TPEC_16:
5390 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
5391 &thermal_temp_input16_group);
5392 if (res)
5393 return res;
5394 break;
5395 case TPACPI_THERMAL_TPEC_8:
5396 case TPACPI_THERMAL_ACPI_TMP07:
5397 case TPACPI_THERMAL_ACPI_UPDT:
5398 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
5399 &thermal_temp_input8_group);
5400 if (res)
5401 return res;
5402 break;
5403 case TPACPI_THERMAL_NONE:
5404 default:
5405 return 1;
5406 }
5407
5408 return 0;
5409 }
5410
5411 static void thermal_exit(void)
5412 {
5413 switch (thermal_read_mode) {
5414 case TPACPI_THERMAL_TPEC_16:
5415 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
5416 &thermal_temp_input16_group);
5417 break;
5418 case TPACPI_THERMAL_TPEC_8:
5419 case TPACPI_THERMAL_ACPI_TMP07:
5420 case TPACPI_THERMAL_ACPI_UPDT:
5421 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
5422 &thermal_temp_input16_group);
5423 break;
5424 case TPACPI_THERMAL_NONE:
5425 default:
5426 break;
5427 }
5428 }
5429
5430 static int thermal_read(char *p)
5431 {
5432 int len = 0;
5433 int n, i;
5434 struct ibm_thermal_sensors_struct t;
5435
5436 n = thermal_get_sensors(&t);
5437 if (unlikely(n < 0))
5438 return n;
5439
5440 len += sprintf(p + len, "temperatures:\t");
5441
5442 if (n > 0) {
5443 for (i = 0; i < (n - 1); i++)
5444 len += sprintf(p + len, "%d ", t.temp[i] / 1000);
5445 len += sprintf(p + len, "%d\n", t.temp[i] / 1000);
5446 } else
5447 len += sprintf(p + len, "not supported\n");
5448
5449 return len;
5450 }
5451
5452 static struct ibm_struct thermal_driver_data = {
5453 .name = "thermal",
5454 .read = thermal_read,
5455 .exit = thermal_exit,
5456 };
5457
5458 /*************************************************************************
5459 * EC Dump subdriver
5460 */
5461
5462 static u8 ecdump_regs[256];
5463
5464 static int ecdump_read(char *p)
5465 {
5466 int len = 0;
5467 int i, j;
5468 u8 v;
5469
5470 len += sprintf(p + len, "EC "
5471 " +00 +01 +02 +03 +04 +05 +06 +07"
5472 " +08 +09 +0a +0b +0c +0d +0e +0f\n");
5473 for (i = 0; i < 256; i += 16) {
5474 len += sprintf(p + len, "EC 0x%02x:", i);
5475 for (j = 0; j < 16; j++) {
5476 if (!acpi_ec_read(i + j, &v))
5477 break;
5478 if (v != ecdump_regs[i + j])
5479 len += sprintf(p + len, " *%02x", v);
5480 else
5481 len += sprintf(p + len, " %02x", v);
5482 ecdump_regs[i + j] = v;
5483 }
5484 len += sprintf(p + len, "\n");
5485 if (j != 16)
5486 break;
5487 }
5488
5489 /* These are way too dangerous to advertise openly... */
5490 #if 0
5491 len += sprintf(p + len, "commands:\t0x<offset> 0x<value>"
5492 " (<offset> is 00-ff, <value> is 00-ff)\n");
5493 len += sprintf(p + len, "commands:\t0x<offset> <value> "
5494 " (<offset> is 00-ff, <value> is 0-255)\n");
5495 #endif
5496 return len;
5497 }
5498
5499 static int ecdump_write(char *buf)
5500 {
5501 char *cmd;
5502 int i, v;
5503
5504 while ((cmd = next_cmd(&buf))) {
5505 if (sscanf(cmd, "0x%x 0x%x", &i, &v) == 2) {
5506 /* i and v set */
5507 } else if (sscanf(cmd, "0x%x %u", &i, &v) == 2) {
5508 /* i and v set */
5509 } else
5510 return -EINVAL;
5511 if (i >= 0 && i < 256 && v >= 0 && v < 256) {
5512 if (!acpi_ec_write(i, v))
5513 return -EIO;
5514 } else
5515 return -EINVAL;
5516 }
5517
5518 return 0;
5519 }
5520
5521 static struct ibm_struct ecdump_driver_data = {
5522 .name = "ecdump",
5523 .read = ecdump_read,
5524 .write = ecdump_write,
5525 .flags.experimental = 1,
5526 };
5527
5528 /*************************************************************************
5529 * Backlight/brightness subdriver
5530 */
5531
5532 #define TPACPI_BACKLIGHT_DEV_NAME "thinkpad_screen"
5533
5534 /*
5535 * ThinkPads can read brightness from two places: EC HBRV (0x31), or
5536 * CMOS NVRAM byte 0x5E, bits 0-3.
5537 *
5538 * EC HBRV (0x31) has the following layout
5539 * Bit 7: unknown function
5540 * Bit 6: unknown function
5541 * Bit 5: Z: honour scale changes, NZ: ignore scale changes
5542 * Bit 4: must be set to zero to avoid problems
5543 * Bit 3-0: backlight brightness level
5544 *
5545 * brightness_get_raw returns status data in the HBRV layout
5546 */
5547
5548 enum {
5549 TP_EC_BACKLIGHT = 0x31,
5550
5551 /* TP_EC_BACKLIGHT bitmasks */
5552 TP_EC_BACKLIGHT_LVLMSK = 0x1F,
5553 TP_EC_BACKLIGHT_CMDMSK = 0xE0,
5554 TP_EC_BACKLIGHT_MAPSW = 0x20,
5555 };
5556
5557 enum tpacpi_brightness_access_mode {
5558 TPACPI_BRGHT_MODE_AUTO = 0, /* Not implemented yet */
5559 TPACPI_BRGHT_MODE_EC, /* EC control */
5560 TPACPI_BRGHT_MODE_UCMS_STEP, /* UCMS step-based control */
5561 TPACPI_BRGHT_MODE_ECNVRAM, /* EC control w/ NVRAM store */
5562 TPACPI_BRGHT_MODE_MAX
5563 };
5564
5565 static struct backlight_device *ibm_backlight_device;
5566
5567 static enum tpacpi_brightness_access_mode brightness_mode =
5568 TPACPI_BRGHT_MODE_MAX;
5569
5570 static unsigned int brightness_enable = 2; /* 2 = auto, 0 = no, 1 = yes */
5571
5572 static struct mutex brightness_mutex;
5573
5574 /* NVRAM brightness access,
5575 * call with brightness_mutex held! */
5576 static unsigned int tpacpi_brightness_nvram_get(void)
5577 {
5578 u8 lnvram;
5579
5580 lnvram = (nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS)
5581 & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
5582 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
5583 lnvram &= (tp_features.bright_16levels) ? 0x0f : 0x07;
5584
5585 return lnvram;
5586 }
5587
5588 static void tpacpi_brightness_checkpoint_nvram(void)
5589 {
5590 u8 lec = 0;
5591 u8 b_nvram;
5592
5593 if (brightness_mode != TPACPI_BRGHT_MODE_ECNVRAM)
5594 return;
5595
5596 vdbg_printk(TPACPI_DBG_BRGHT,
5597 "trying to checkpoint backlight level to NVRAM...\n");
5598
5599 if (mutex_lock_killable(&brightness_mutex) < 0)
5600 return;
5601
5602 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
5603 goto unlock;
5604 lec &= TP_EC_BACKLIGHT_LVLMSK;
5605 b_nvram = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS);
5606
5607 if (lec != ((b_nvram & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
5608 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS)) {
5609 /* NVRAM needs update */
5610 b_nvram &= ~(TP_NVRAM_MASK_LEVEL_BRIGHTNESS <<
5611 TP_NVRAM_POS_LEVEL_BRIGHTNESS);
5612 b_nvram |= lec;
5613 nvram_write_byte(b_nvram, TP_NVRAM_ADDR_BRIGHTNESS);
5614 dbg_printk(TPACPI_DBG_BRGHT,
5615 "updated NVRAM backlight level to %u (0x%02x)\n",
5616 (unsigned int) lec, (unsigned int) b_nvram);
5617 } else
5618 vdbg_printk(TPACPI_DBG_BRGHT,
5619 "NVRAM backlight level already is %u (0x%02x)\n",
5620 (unsigned int) lec, (unsigned int) b_nvram);
5621
5622 unlock:
5623 mutex_unlock(&brightness_mutex);
5624 }
5625
5626
5627 /* call with brightness_mutex held! */
5628 static int tpacpi_brightness_get_raw(int *status)
5629 {
5630 u8 lec = 0;
5631
5632 switch (brightness_mode) {
5633 case TPACPI_BRGHT_MODE_UCMS_STEP:
5634 *status = tpacpi_brightness_nvram_get();
5635 return 0;
5636 case TPACPI_BRGHT_MODE_EC:
5637 case TPACPI_BRGHT_MODE_ECNVRAM:
5638 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
5639 return -EIO;
5640 *status = lec;
5641 return 0;
5642 default:
5643 return -ENXIO;
5644 }
5645 }
5646
5647 /* call with brightness_mutex held! */
5648 /* do NOT call with illegal backlight level value */
5649 static int tpacpi_brightness_set_ec(unsigned int value)
5650 {
5651 u8 lec = 0;
5652
5653 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
5654 return -EIO;
5655
5656 if (unlikely(!acpi_ec_write(TP_EC_BACKLIGHT,
5657 (lec & TP_EC_BACKLIGHT_CMDMSK) |
5658 (value & TP_EC_BACKLIGHT_LVLMSK))))
5659 return -EIO;
5660
5661 return 0;
5662 }
5663
5664 /* call with brightness_mutex held! */
5665 static int tpacpi_brightness_set_ucmsstep(unsigned int value)
5666 {
5667 int cmos_cmd, inc;
5668 unsigned int current_value, i;
5669
5670 current_value = tpacpi_brightness_nvram_get();
5671
5672 if (value == current_value)
5673 return 0;
5674
5675 cmos_cmd = (value > current_value) ?
5676 TP_CMOS_BRIGHTNESS_UP :
5677 TP_CMOS_BRIGHTNESS_DOWN;
5678 inc = (value > current_value) ? 1 : -1;
5679
5680 for (i = current_value; i != value; i += inc)
5681 if (issue_thinkpad_cmos_command(cmos_cmd))
5682 return -EIO;
5683
5684 return 0;
5685 }
5686
5687 /* May return EINTR which can always be mapped to ERESTARTSYS */
5688 static int brightness_set(unsigned int value)
5689 {
5690 int res;
5691
5692 if (value > ((tp_features.bright_16levels)? 15 : 7) ||
5693 value < 0)
5694 return -EINVAL;
5695
5696 vdbg_printk(TPACPI_DBG_BRGHT,
5697 "set backlight level to %d\n", value);
5698
5699 res = mutex_lock_killable(&brightness_mutex);
5700 if (res < 0)
5701 return res;
5702
5703 switch (brightness_mode) {
5704 case TPACPI_BRGHT_MODE_EC:
5705 case TPACPI_BRGHT_MODE_ECNVRAM:
5706 res = tpacpi_brightness_set_ec(value);
5707 break;
5708 case TPACPI_BRGHT_MODE_UCMS_STEP:
5709 res = tpacpi_brightness_set_ucmsstep(value);
5710 break;
5711 default:
5712 res = -ENXIO;
5713 }
5714
5715 mutex_unlock(&brightness_mutex);
5716 return res;
5717 }
5718
5719 /* sysfs backlight class ----------------------------------------------- */
5720
5721 static int brightness_update_status(struct backlight_device *bd)
5722 {
5723 unsigned int level =
5724 (bd->props.fb_blank == FB_BLANK_UNBLANK &&
5725 bd->props.power == FB_BLANK_UNBLANK) ?
5726 bd->props.brightness : 0;
5727
5728 dbg_printk(TPACPI_DBG_BRGHT,
5729 "backlight: attempt to set level to %d\n",
5730 level);
5731
5732 /* it is the backlight class's job (caller) to handle
5733 * EINTR and other errors properly */
5734 return brightness_set(level);
5735 }
5736
5737 static int brightness_get(struct backlight_device *bd)
5738 {
5739 int status, res;
5740
5741 res = mutex_lock_killable(&brightness_mutex);
5742 if (res < 0)
5743 return 0;
5744
5745 res = tpacpi_brightness_get_raw(&status);
5746
5747 mutex_unlock(&brightness_mutex);
5748
5749 if (res < 0)
5750 return 0;
5751
5752 return status & TP_EC_BACKLIGHT_LVLMSK;
5753 }
5754
5755 static struct backlight_ops ibm_backlight_data = {
5756 .get_brightness = brightness_get,
5757 .update_status = brightness_update_status,
5758 };
5759
5760 /* --------------------------------------------------------------------- */
5761
5762 static int __init brightness_init(struct ibm_init_struct *iibm)
5763 {
5764 int b;
5765
5766 vdbg_printk(TPACPI_DBG_INIT, "initializing brightness subdriver\n");
5767
5768 mutex_init(&brightness_mutex);
5769
5770 /*
5771 * We always attempt to detect acpi support, so as to switch
5772 * Lenovo Vista BIOS to ACPI brightness mode even if we are not
5773 * going to publish a backlight interface
5774 */
5775 b = tpacpi_check_std_acpi_brightness_support();
5776 if (b > 0) {
5777
5778 if (acpi_video_backlight_support()) {
5779 if (brightness_enable > 1) {
5780 printk(TPACPI_NOTICE
5781 "Standard ACPI backlight interface "
5782 "available, not loading native one.\n");
5783 return 1;
5784 } else if (brightness_enable == 1) {
5785 printk(TPACPI_NOTICE
5786 "Backlight control force enabled, even if standard "
5787 "ACPI backlight interface is available\n");
5788 }
5789 } else {
5790 if (brightness_enable > 1) {
5791 printk(TPACPI_NOTICE
5792 "Standard ACPI backlight interface not "
5793 "available, thinkpad_acpi native "
5794 "brightness control enabled\n");
5795 }
5796 }
5797 }
5798
5799 if (!brightness_enable) {
5800 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT,
5801 "brightness support disabled by "
5802 "module parameter\n");
5803 return 1;
5804 }
5805
5806 if (b > 16) {
5807 printk(TPACPI_ERR
5808 "Unsupported brightness interface, "
5809 "please contact %s\n", TPACPI_MAIL);
5810 return 1;
5811 }
5812 if (b == 16)
5813 tp_features.bright_16levels = 1;
5814
5815 /*
5816 * Check for module parameter bogosity, note that we
5817 * init brightness_mode to TPACPI_BRGHT_MODE_MAX in order to be
5818 * able to detect "unspecified"
5819 */
5820 if (brightness_mode > TPACPI_BRGHT_MODE_MAX)
5821 return -EINVAL;
5822
5823 /* TPACPI_BRGHT_MODE_AUTO not implemented yet, just use default */
5824 if (brightness_mode == TPACPI_BRGHT_MODE_AUTO ||
5825 brightness_mode == TPACPI_BRGHT_MODE_MAX) {
5826 if (thinkpad_id.vendor == PCI_VENDOR_ID_IBM) {
5827 /*
5828 * IBM models that define HBRV probably have
5829 * EC-based backlight level control
5830 */
5831 if (acpi_evalf(ec_handle, NULL, "HBRV", "qd"))
5832 /* T40-T43, R50-R52, R50e, R51e, X31-X41 */
5833 brightness_mode = TPACPI_BRGHT_MODE_ECNVRAM;
5834 else
5835 /* all other IBM ThinkPads */
5836 brightness_mode = TPACPI_BRGHT_MODE_UCMS_STEP;
5837 } else
5838 /* All Lenovo ThinkPads */
5839 brightness_mode = TPACPI_BRGHT_MODE_UCMS_STEP;
5840
5841 dbg_printk(TPACPI_DBG_BRGHT,
5842 "selected brightness_mode=%d\n",
5843 brightness_mode);
5844 }
5845
5846 if (tpacpi_brightness_get_raw(&b) < 0)
5847 return 1;
5848
5849 if (tp_features.bright_16levels)
5850 printk(TPACPI_INFO
5851 "detected a 16-level brightness capable ThinkPad\n");
5852
5853 ibm_backlight_device = backlight_device_register(
5854 TPACPI_BACKLIGHT_DEV_NAME, NULL, NULL,
5855 &ibm_backlight_data);
5856 if (IS_ERR(ibm_backlight_device)) {
5857 printk(TPACPI_ERR "Could not register backlight device\n");
5858 return PTR_ERR(ibm_backlight_device);
5859 }
5860 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT,
5861 "brightness is supported\n");
5862
5863 ibm_backlight_device->props.max_brightness =
5864 (tp_features.bright_16levels)? 15 : 7;
5865 ibm_backlight_device->props.brightness = b & TP_EC_BACKLIGHT_LVLMSK;
5866 backlight_update_status(ibm_backlight_device);
5867
5868 return 0;
5869 }
5870
5871 static void brightness_suspend(pm_message_t state)
5872 {
5873 tpacpi_brightness_checkpoint_nvram();
5874 }
5875
5876 static void brightness_shutdown(void)
5877 {
5878 tpacpi_brightness_checkpoint_nvram();
5879 }
5880
5881 static void brightness_exit(void)
5882 {
5883 if (ibm_backlight_device) {
5884 vdbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_BRGHT,
5885 "calling backlight_device_unregister()\n");
5886 backlight_device_unregister(ibm_backlight_device);
5887 }
5888
5889 tpacpi_brightness_checkpoint_nvram();
5890 }
5891
5892 static int brightness_read(char *p)
5893 {
5894 int len = 0;
5895 int level;
5896
5897 level = brightness_get(NULL);
5898 if (level < 0) {
5899 len += sprintf(p + len, "level:\t\tunreadable\n");
5900 } else {
5901 len += sprintf(p + len, "level:\t\t%d\n", level);
5902 len += sprintf(p + len, "commands:\tup, down\n");
5903 len += sprintf(p + len, "commands:\tlevel <level>"
5904 " (<level> is 0-%d)\n",
5905 (tp_features.bright_16levels) ? 15 : 7);
5906 }
5907
5908 return len;
5909 }
5910
5911 static int brightness_write(char *buf)
5912 {
5913 int level;
5914 int rc;
5915 char *cmd;
5916 int max_level = (tp_features.bright_16levels) ? 15 : 7;
5917
5918 level = brightness_get(NULL);
5919 if (level < 0)
5920 return level;
5921
5922 while ((cmd = next_cmd(&buf))) {
5923 if (strlencmp(cmd, "up") == 0) {
5924 if (level < max_level)
5925 level++;
5926 } else if (strlencmp(cmd, "down") == 0) {
5927 if (level > 0)
5928 level--;
5929 } else if (sscanf(cmd, "level %d", &level) == 1 &&
5930 level >= 0 && level <= max_level) {
5931 /* new level set */
5932 } else
5933 return -EINVAL;
5934 }
5935
5936 tpacpi_disclose_usertask("procfs brightness",
5937 "set level to %d\n", level);
5938
5939 /*
5940 * Now we know what the final level should be, so we try to set it.
5941 * Doing it this way makes the syscall restartable in case of EINTR
5942 */
5943 rc = brightness_set(level);
5944 return (rc == -EINTR)? ERESTARTSYS : rc;
5945 }
5946
5947 static struct ibm_struct brightness_driver_data = {
5948 .name = "brightness",
5949 .read = brightness_read,
5950 .write = brightness_write,
5951 .exit = brightness_exit,
5952 .suspend = brightness_suspend,
5953 .shutdown = brightness_shutdown,
5954 };
5955
5956 /*************************************************************************
5957 * Volume subdriver
5958 */
5959
5960 static int volume_offset = 0x30;
5961
5962 static int volume_read(char *p)
5963 {
5964 int len = 0;
5965 u8 level;
5966
5967 if (!acpi_ec_read(volume_offset, &level)) {
5968 len += sprintf(p + len, "level:\t\tunreadable\n");
5969 } else {
5970 len += sprintf(p + len, "level:\t\t%d\n", level & 0xf);
5971 len += sprintf(p + len, "mute:\t\t%s\n", onoff(level, 6));
5972 len += sprintf(p + len, "commands:\tup, down, mute\n");
5973 len += sprintf(p + len, "commands:\tlevel <level>"
5974 " (<level> is 0-15)\n");
5975 }
5976
5977 return len;
5978 }
5979
5980 static int volume_write(char *buf)
5981 {
5982 int cmos_cmd, inc, i;
5983 u8 level, mute;
5984 int new_level, new_mute;
5985 char *cmd;
5986
5987 while ((cmd = next_cmd(&buf))) {
5988 if (!acpi_ec_read(volume_offset, &level))
5989 return -EIO;
5990 new_mute = mute = level & 0x40;
5991 new_level = level = level & 0xf;
5992
5993 if (strlencmp(cmd, "up") == 0) {
5994 if (mute)
5995 new_mute = 0;
5996 else
5997 new_level = level == 15 ? 15 : level + 1;
5998 } else if (strlencmp(cmd, "down") == 0) {
5999 if (mute)
6000 new_mute = 0;
6001 else
6002 new_level = level == 0 ? 0 : level - 1;
6003 } else if (sscanf(cmd, "level %d", &new_level) == 1 &&
6004 new_level >= 0 && new_level <= 15) {
6005 /* new_level set */
6006 } else if (strlencmp(cmd, "mute") == 0) {
6007 new_mute = 0x40;
6008 } else
6009 return -EINVAL;
6010
6011 if (new_level != level) {
6012 /* mute doesn't change */
6013
6014 cmos_cmd = (new_level > level) ?
6015 TP_CMOS_VOLUME_UP : TP_CMOS_VOLUME_DOWN;
6016 inc = new_level > level ? 1 : -1;
6017
6018 if (mute && (issue_thinkpad_cmos_command(cmos_cmd) ||
6019 !acpi_ec_write(volume_offset, level)))
6020 return -EIO;
6021
6022 for (i = level; i != new_level; i += inc)
6023 if (issue_thinkpad_cmos_command(cmos_cmd) ||
6024 !acpi_ec_write(volume_offset, i + inc))
6025 return -EIO;
6026
6027 if (mute &&
6028 (issue_thinkpad_cmos_command(TP_CMOS_VOLUME_MUTE) ||
6029 !acpi_ec_write(volume_offset, new_level + mute))) {
6030 return -EIO;
6031 }
6032 }
6033
6034 if (new_mute != mute) {
6035 /* level doesn't change */
6036
6037 cmos_cmd = (new_mute) ?
6038 TP_CMOS_VOLUME_MUTE : TP_CMOS_VOLUME_UP;
6039
6040 if (issue_thinkpad_cmos_command(cmos_cmd) ||
6041 !acpi_ec_write(volume_offset, level + new_mute))
6042 return -EIO;
6043 }
6044 }
6045
6046 return 0;
6047 }
6048
6049 static struct ibm_struct volume_driver_data = {
6050 .name = "volume",
6051 .read = volume_read,
6052 .write = volume_write,
6053 };
6054
6055 /*************************************************************************
6056 * Fan subdriver
6057 */
6058
6059 /*
6060 * FAN ACCESS MODES
6061 *
6062 * TPACPI_FAN_RD_ACPI_GFAN:
6063 * ACPI GFAN method: returns fan level
6064 *
6065 * see TPACPI_FAN_WR_ACPI_SFAN
6066 * EC 0x2f (HFSP) not available if GFAN exists
6067 *
6068 * TPACPI_FAN_WR_ACPI_SFAN:
6069 * ACPI SFAN method: sets fan level, 0 (stop) to 7 (max)
6070 *
6071 * EC 0x2f (HFSP) might be available *for reading*, but do not use
6072 * it for writing.
6073 *
6074 * TPACPI_FAN_WR_TPEC:
6075 * ThinkPad EC register 0x2f (HFSP): fan control loop mode
6076 * Supported on almost all ThinkPads
6077 *
6078 * Fan speed changes of any sort (including those caused by the
6079 * disengaged mode) are usually done slowly by the firmware as the
6080 * maximum ammount of fan duty cycle change per second seems to be
6081 * limited.
6082 *
6083 * Reading is not available if GFAN exists.
6084 * Writing is not available if SFAN exists.
6085 *
6086 * Bits
6087 * 7 automatic mode engaged;
6088 * (default operation mode of the ThinkPad)
6089 * fan level is ignored in this mode.
6090 * 6 full speed mode (takes precedence over bit 7);
6091 * not available on all thinkpads. May disable
6092 * the tachometer while the fan controller ramps up
6093 * the speed (which can take up to a few *minutes*).
6094 * Speeds up fan to 100% duty-cycle, which is far above
6095 * the standard RPM levels. It is not impossible that
6096 * it could cause hardware damage.
6097 * 5-3 unused in some models. Extra bits for fan level
6098 * in others, but still useless as all values above
6099 * 7 map to the same speed as level 7 in these models.
6100 * 2-0 fan level (0..7 usually)
6101 * 0x00 = stop
6102 * 0x07 = max (set when temperatures critical)
6103 * Some ThinkPads may have other levels, see
6104 * TPACPI_FAN_WR_ACPI_FANS (X31/X40/X41)
6105 *
6106 * FIRMWARE BUG: on some models, EC 0x2f might not be initialized at
6107 * boot. Apparently the EC does not intialize it, so unless ACPI DSDT
6108 * does so, its initial value is meaningless (0x07).
6109 *
6110 * For firmware bugs, refer to:
6111 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
6112 *
6113 * ----
6114 *
6115 * ThinkPad EC register 0x84 (LSB), 0x85 (MSB):
6116 * Main fan tachometer reading (in RPM)
6117 *
6118 * This register is present on all ThinkPads with a new-style EC, and
6119 * it is known not to be present on the A21m/e, and T22, as there is
6120 * something else in offset 0x84 according to the ACPI DSDT. Other
6121 * ThinkPads from this same time period (and earlier) probably lack the
6122 * tachometer as well.
6123 *
6124 * Unfortunately a lot of ThinkPads with new-style ECs but whose firmware
6125 * was never fixed by IBM to report the EC firmware version string
6126 * probably support the tachometer (like the early X models), so
6127 * detecting it is quite hard. We need more data to know for sure.
6128 *
6129 * FIRMWARE BUG: always read 0x84 first, otherwise incorrect readings
6130 * might result.
6131 *
6132 * FIRMWARE BUG: may go stale while the EC is switching to full speed
6133 * mode.
6134 *
6135 * For firmware bugs, refer to:
6136 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
6137 *
6138 * TPACPI_FAN_WR_ACPI_FANS:
6139 * ThinkPad X31, X40, X41. Not available in the X60.
6140 *
6141 * FANS ACPI handle: takes three arguments: low speed, medium speed,
6142 * high speed. ACPI DSDT seems to map these three speeds to levels
6143 * as follows: STOP LOW LOW MED MED HIGH HIGH HIGH HIGH
6144 * (this map is stored on FAN0..FAN8 as "0,1,1,2,2,3,3,3,3")
6145 *
6146 * The speeds are stored on handles
6147 * (FANA:FAN9), (FANC:FANB), (FANE:FAND).
6148 *
6149 * There are three default speed sets, acessible as handles:
6150 * FS1L,FS1M,FS1H; FS2L,FS2M,FS2H; FS3L,FS3M,FS3H
6151 *
6152 * ACPI DSDT switches which set is in use depending on various
6153 * factors.
6154 *
6155 * TPACPI_FAN_WR_TPEC is also available and should be used to
6156 * command the fan. The X31/X40/X41 seems to have 8 fan levels,
6157 * but the ACPI tables just mention level 7.
6158 */
6159
6160 enum { /* Fan control constants */
6161 fan_status_offset = 0x2f, /* EC register 0x2f */
6162 fan_rpm_offset = 0x84, /* EC register 0x84: LSB, 0x85 MSB (RPM)
6163 * 0x84 must be read before 0x85 */
6164
6165 TP_EC_FAN_FULLSPEED = 0x40, /* EC fan mode: full speed */
6166 TP_EC_FAN_AUTO = 0x80, /* EC fan mode: auto fan control */
6167
6168 TPACPI_FAN_LAST_LEVEL = 0x100, /* Use cached last-seen fan level */
6169 };
6170
6171 enum fan_status_access_mode {
6172 TPACPI_FAN_NONE = 0, /* No fan status or control */
6173 TPACPI_FAN_RD_ACPI_GFAN, /* Use ACPI GFAN */
6174 TPACPI_FAN_RD_TPEC, /* Use ACPI EC regs 0x2f, 0x84-0x85 */
6175 };
6176
6177 enum fan_control_access_mode {
6178 TPACPI_FAN_WR_NONE = 0, /* No fan control */
6179 TPACPI_FAN_WR_ACPI_SFAN, /* Use ACPI SFAN */
6180 TPACPI_FAN_WR_TPEC, /* Use ACPI EC reg 0x2f */
6181 TPACPI_FAN_WR_ACPI_FANS, /* Use ACPI FANS and EC reg 0x2f */
6182 };
6183
6184 enum fan_control_commands {
6185 TPACPI_FAN_CMD_SPEED = 0x0001, /* speed command */
6186 TPACPI_FAN_CMD_LEVEL = 0x0002, /* level command */
6187 TPACPI_FAN_CMD_ENABLE = 0x0004, /* enable/disable cmd,
6188 * and also watchdog cmd */
6189 };
6190
6191 static int fan_control_allowed;
6192
6193 static enum fan_status_access_mode fan_status_access_mode;
6194 static enum fan_control_access_mode fan_control_access_mode;
6195 static enum fan_control_commands fan_control_commands;
6196
6197 static u8 fan_control_initial_status;
6198 static u8 fan_control_desired_level;
6199 static u8 fan_control_resume_level;
6200 static int fan_watchdog_maxinterval;
6201
6202 static struct mutex fan_mutex;
6203
6204 static void fan_watchdog_fire(struct work_struct *ignored);
6205 static DECLARE_DELAYED_WORK(fan_watchdog_task, fan_watchdog_fire);
6206
6207 TPACPI_HANDLE(fans, ec, "FANS"); /* X31, X40, X41 */
6208 TPACPI_HANDLE(gfan, ec, "GFAN", /* 570 */
6209 "\\FSPD", /* 600e/x, 770e, 770x */
6210 ); /* all others */
6211 TPACPI_HANDLE(sfan, ec, "SFAN", /* 570 */
6212 "JFNS", /* 770x-JL */
6213 ); /* all others */
6214
6215 /*
6216 * Unitialized HFSP quirk: ACPI DSDT and EC fail to initialize the
6217 * HFSP register at boot, so it contains 0x07 but the Thinkpad could
6218 * be in auto mode (0x80).
6219 *
6220 * This is corrected by any write to HFSP either by the driver, or
6221 * by the firmware.
6222 *
6223 * We assume 0x07 really means auto mode while this quirk is active,
6224 * as this is far more likely than the ThinkPad being in level 7,
6225 * which is only used by the firmware during thermal emergencies.
6226 */
6227
6228 static void fan_quirk1_detect(void)
6229 {
6230 /* In some ThinkPads, neither the EC nor the ACPI
6231 * DSDT initialize the HFSP register, and it ends up
6232 * being initially set to 0x07 when it *could* be
6233 * either 0x07 or 0x80.
6234 *
6235 * Enable for TP-1Y (T43), TP-78 (R51e),
6236 * TP-76 (R52), TP-70 (T43, R52), which are known
6237 * to be buggy. */
6238 if (fan_control_initial_status == 0x07) {
6239 switch (thinkpad_id.ec_model) {
6240 case 0x5931: /* TP-1Y */
6241 case 0x3837: /* TP-78 */
6242 case 0x3637: /* TP-76 */
6243 case 0x3037: /* TP-70 */
6244 printk(TPACPI_NOTICE
6245 "fan_init: initial fan status is unknown, "
6246 "assuming it is in auto mode\n");
6247 tp_features.fan_ctrl_status_undef = 1;
6248 ;;
6249 }
6250 }
6251 }
6252
6253 static void fan_quirk1_handle(u8 *fan_status)
6254 {
6255 if (unlikely(tp_features.fan_ctrl_status_undef)) {
6256 if (*fan_status != fan_control_initial_status) {
6257 /* something changed the HFSP regisnter since
6258 * driver init time, so it is not undefined
6259 * anymore */
6260 tp_features.fan_ctrl_status_undef = 0;
6261 } else {
6262 /* Return most likely status. In fact, it
6263 * might be the only possible status */
6264 *fan_status = TP_EC_FAN_AUTO;
6265 }
6266 }
6267 }
6268
6269 /*
6270 * Call with fan_mutex held
6271 */
6272 static void fan_update_desired_level(u8 status)
6273 {
6274 if ((status &
6275 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
6276 if (status > 7)
6277 fan_control_desired_level = 7;
6278 else
6279 fan_control_desired_level = status;
6280 }
6281 }
6282
6283 static int fan_get_status(u8 *status)
6284 {
6285 u8 s;
6286
6287 /* TODO:
6288 * Add TPACPI_FAN_RD_ACPI_FANS ? */
6289
6290 switch (fan_status_access_mode) {
6291 case TPACPI_FAN_RD_ACPI_GFAN:
6292 /* 570, 600e/x, 770e, 770x */
6293
6294 if (unlikely(!acpi_evalf(gfan_handle, &s, NULL, "d")))
6295 return -EIO;
6296
6297 if (likely(status))
6298 *status = s & 0x07;
6299
6300 break;
6301
6302 case TPACPI_FAN_RD_TPEC:
6303 /* all except 570, 600e/x, 770e, 770x */
6304 if (unlikely(!acpi_ec_read(fan_status_offset, &s)))
6305 return -EIO;
6306
6307 if (likely(status)) {
6308 *status = s;
6309 fan_quirk1_handle(status);
6310 }
6311
6312 break;
6313
6314 default:
6315 return -ENXIO;
6316 }
6317
6318 return 0;
6319 }
6320
6321 static int fan_get_status_safe(u8 *status)
6322 {
6323 int rc;
6324 u8 s;
6325
6326 if (mutex_lock_killable(&fan_mutex))
6327 return -ERESTARTSYS;
6328 rc = fan_get_status(&s);
6329 if (!rc)
6330 fan_update_desired_level(s);
6331 mutex_unlock(&fan_mutex);
6332
6333 if (status)
6334 *status = s;
6335
6336 return rc;
6337 }
6338
6339 static int fan_get_speed(unsigned int *speed)
6340 {
6341 u8 hi, lo;
6342
6343 switch (fan_status_access_mode) {
6344 case TPACPI_FAN_RD_TPEC:
6345 /* all except 570, 600e/x, 770e, 770x */
6346 if (unlikely(!acpi_ec_read(fan_rpm_offset, &lo) ||
6347 !acpi_ec_read(fan_rpm_offset + 1, &hi)))
6348 return -EIO;
6349
6350 if (likely(speed))
6351 *speed = (hi << 8) | lo;
6352
6353 break;
6354
6355 default:
6356 return -ENXIO;
6357 }
6358
6359 return 0;
6360 }
6361
6362 static int fan_set_level(int level)
6363 {
6364 if (!fan_control_allowed)
6365 return -EPERM;
6366
6367 switch (fan_control_access_mode) {
6368 case TPACPI_FAN_WR_ACPI_SFAN:
6369 if (level >= 0 && level <= 7) {
6370 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", level))
6371 return -EIO;
6372 } else
6373 return -EINVAL;
6374 break;
6375
6376 case TPACPI_FAN_WR_ACPI_FANS:
6377 case TPACPI_FAN_WR_TPEC:
6378 if (!(level & TP_EC_FAN_AUTO) &&
6379 !(level & TP_EC_FAN_FULLSPEED) &&
6380 ((level < 0) || (level > 7)))
6381 return -EINVAL;
6382
6383 /* safety net should the EC not support AUTO
6384 * or FULLSPEED mode bits and just ignore them */
6385 if (level & TP_EC_FAN_FULLSPEED)
6386 level |= 7; /* safety min speed 7 */
6387 else if (level & TP_EC_FAN_AUTO)
6388 level |= 4; /* safety min speed 4 */
6389
6390 if (!acpi_ec_write(fan_status_offset, level))
6391 return -EIO;
6392 else
6393 tp_features.fan_ctrl_status_undef = 0;
6394 break;
6395
6396 default:
6397 return -ENXIO;
6398 }
6399
6400 vdbg_printk(TPACPI_DBG_FAN,
6401 "fan control: set fan control register to 0x%02x\n", level);
6402 return 0;
6403 }
6404
6405 static int fan_set_level_safe(int level)
6406 {
6407 int rc;
6408
6409 if (!fan_control_allowed)
6410 return -EPERM;
6411
6412 if (mutex_lock_killable(&fan_mutex))
6413 return -ERESTARTSYS;
6414
6415 if (level == TPACPI_FAN_LAST_LEVEL)
6416 level = fan_control_desired_level;
6417
6418 rc = fan_set_level(level);
6419 if (!rc)
6420 fan_update_desired_level(level);
6421
6422 mutex_unlock(&fan_mutex);
6423 return rc;
6424 }
6425
6426 static int fan_set_enable(void)
6427 {
6428 u8 s;
6429 int rc;
6430
6431 if (!fan_control_allowed)
6432 return -EPERM;
6433
6434 if (mutex_lock_killable(&fan_mutex))
6435 return -ERESTARTSYS;
6436
6437 switch (fan_control_access_mode) {
6438 case TPACPI_FAN_WR_ACPI_FANS:
6439 case TPACPI_FAN_WR_TPEC:
6440 rc = fan_get_status(&s);
6441 if (rc < 0)
6442 break;
6443
6444 /* Don't go out of emergency fan mode */
6445 if (s != 7) {
6446 s &= 0x07;
6447 s |= TP_EC_FAN_AUTO | 4; /* min fan speed 4 */
6448 }
6449
6450 if (!acpi_ec_write(fan_status_offset, s))
6451 rc = -EIO;
6452 else {
6453 tp_features.fan_ctrl_status_undef = 0;
6454 rc = 0;
6455 }
6456 break;
6457
6458 case TPACPI_FAN_WR_ACPI_SFAN:
6459 rc = fan_get_status(&s);
6460 if (rc < 0)
6461 break;
6462
6463 s &= 0x07;
6464
6465 /* Set fan to at least level 4 */
6466 s |= 4;
6467
6468 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", s))
6469 rc = -EIO;
6470 else
6471 rc = 0;
6472 break;
6473
6474 default:
6475 rc = -ENXIO;
6476 }
6477
6478 mutex_unlock(&fan_mutex);
6479
6480 if (!rc)
6481 vdbg_printk(TPACPI_DBG_FAN,
6482 "fan control: set fan control register to 0x%02x\n",
6483 s);
6484 return rc;
6485 }
6486
6487 static int fan_set_disable(void)
6488 {
6489 int rc;
6490
6491 if (!fan_control_allowed)
6492 return -EPERM;
6493
6494 if (mutex_lock_killable(&fan_mutex))
6495 return -ERESTARTSYS;
6496
6497 rc = 0;
6498 switch (fan_control_access_mode) {
6499 case TPACPI_FAN_WR_ACPI_FANS:
6500 case TPACPI_FAN_WR_TPEC:
6501 if (!acpi_ec_write(fan_status_offset, 0x00))
6502 rc = -EIO;
6503 else {
6504 fan_control_desired_level = 0;
6505 tp_features.fan_ctrl_status_undef = 0;
6506 }
6507 break;
6508
6509 case TPACPI_FAN_WR_ACPI_SFAN:
6510 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", 0x00))
6511 rc = -EIO;
6512 else
6513 fan_control_desired_level = 0;
6514 break;
6515
6516 default:
6517 rc = -ENXIO;
6518 }
6519
6520 if (!rc)
6521 vdbg_printk(TPACPI_DBG_FAN,
6522 "fan control: set fan control register to 0\n");
6523
6524 mutex_unlock(&fan_mutex);
6525 return rc;
6526 }
6527
6528 static int fan_set_speed(int speed)
6529 {
6530 int rc;
6531
6532 if (!fan_control_allowed)
6533 return -EPERM;
6534
6535 if (mutex_lock_killable(&fan_mutex))
6536 return -ERESTARTSYS;
6537
6538 rc = 0;
6539 switch (fan_control_access_mode) {
6540 case TPACPI_FAN_WR_ACPI_FANS:
6541 if (speed >= 0 && speed <= 65535) {
6542 if (!acpi_evalf(fans_handle, NULL, NULL, "vddd",
6543 speed, speed, speed))
6544 rc = -EIO;
6545 } else
6546 rc = -EINVAL;
6547 break;
6548
6549 default:
6550 rc = -ENXIO;
6551 }
6552
6553 mutex_unlock(&fan_mutex);
6554 return rc;
6555 }
6556
6557 static void fan_watchdog_reset(void)
6558 {
6559 static int fan_watchdog_active;
6560
6561 if (fan_control_access_mode == TPACPI_FAN_WR_NONE)
6562 return;
6563
6564 if (fan_watchdog_active)
6565 cancel_delayed_work(&fan_watchdog_task);
6566
6567 if (fan_watchdog_maxinterval > 0 &&
6568 tpacpi_lifecycle != TPACPI_LIFE_EXITING) {
6569 fan_watchdog_active = 1;
6570 if (!queue_delayed_work(tpacpi_wq, &fan_watchdog_task,
6571 msecs_to_jiffies(fan_watchdog_maxinterval
6572 * 1000))) {
6573 printk(TPACPI_ERR
6574 "failed to queue the fan watchdog, "
6575 "watchdog will not trigger\n");
6576 }
6577 } else
6578 fan_watchdog_active = 0;
6579 }
6580
6581 static void fan_watchdog_fire(struct work_struct *ignored)
6582 {
6583 int rc;
6584
6585 if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
6586 return;
6587
6588 printk(TPACPI_NOTICE "fan watchdog: enabling fan\n");
6589 rc = fan_set_enable();
6590 if (rc < 0) {
6591 printk(TPACPI_ERR "fan watchdog: error %d while enabling fan, "
6592 "will try again later...\n", -rc);
6593 /* reschedule for later */
6594 fan_watchdog_reset();
6595 }
6596 }
6597
6598 /*
6599 * SYSFS fan layout: hwmon compatible (device)
6600 *
6601 * pwm*_enable:
6602 * 0: "disengaged" mode
6603 * 1: manual mode
6604 * 2: native EC "auto" mode (recommended, hardware default)
6605 *
6606 * pwm*: set speed in manual mode, ignored otherwise.
6607 * 0 is level 0; 255 is level 7. Intermediate points done with linear
6608 * interpolation.
6609 *
6610 * fan*_input: tachometer reading, RPM
6611 *
6612 *
6613 * SYSFS fan layout: extensions
6614 *
6615 * fan_watchdog (driver):
6616 * fan watchdog interval in seconds, 0 disables (default), max 120
6617 */
6618
6619 /* sysfs fan pwm1_enable ----------------------------------------------- */
6620 static ssize_t fan_pwm1_enable_show(struct device *dev,
6621 struct device_attribute *attr,
6622 char *buf)
6623 {
6624 int res, mode;
6625 u8 status;
6626
6627 res = fan_get_status_safe(&status);
6628 if (res)
6629 return res;
6630
6631 if (status & TP_EC_FAN_FULLSPEED) {
6632 mode = 0;
6633 } else if (status & TP_EC_FAN_AUTO) {
6634 mode = 2;
6635 } else
6636 mode = 1;
6637
6638 return snprintf(buf, PAGE_SIZE, "%d\n", mode);
6639 }
6640
6641 static ssize_t fan_pwm1_enable_store(struct device *dev,
6642 struct device_attribute *attr,
6643 const char *buf, size_t count)
6644 {
6645 unsigned long t;
6646 int res, level;
6647
6648 if (parse_strtoul(buf, 2, &t))
6649 return -EINVAL;
6650
6651 tpacpi_disclose_usertask("hwmon pwm1_enable",
6652 "set fan mode to %lu\n", t);
6653
6654 switch (t) {
6655 case 0:
6656 level = TP_EC_FAN_FULLSPEED;
6657 break;
6658 case 1:
6659 level = TPACPI_FAN_LAST_LEVEL;
6660 break;
6661 case 2:
6662 level = TP_EC_FAN_AUTO;
6663 break;
6664 case 3:
6665 /* reserved for software-controlled auto mode */
6666 return -ENOSYS;
6667 default:
6668 return -EINVAL;
6669 }
6670
6671 res = fan_set_level_safe(level);
6672 if (res == -ENXIO)
6673 return -EINVAL;
6674 else if (res < 0)
6675 return res;
6676
6677 fan_watchdog_reset();
6678
6679 return count;
6680 }
6681
6682 static struct device_attribute dev_attr_fan_pwm1_enable =
6683 __ATTR(pwm1_enable, S_IWUSR | S_IRUGO,
6684 fan_pwm1_enable_show, fan_pwm1_enable_store);
6685
6686 /* sysfs fan pwm1 ------------------------------------------------------ */
6687 static ssize_t fan_pwm1_show(struct device *dev,
6688 struct device_attribute *attr,
6689 char *buf)
6690 {
6691 int res;
6692 u8 status;
6693
6694 res = fan_get_status_safe(&status);
6695 if (res)
6696 return res;
6697
6698 if ((status &
6699 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) != 0)
6700 status = fan_control_desired_level;
6701
6702 if (status > 7)
6703 status = 7;
6704
6705 return snprintf(buf, PAGE_SIZE, "%u\n", (status * 255) / 7);
6706 }
6707
6708 static ssize_t fan_pwm1_store(struct device *dev,
6709 struct device_attribute *attr,
6710 const char *buf, size_t count)
6711 {
6712 unsigned long s;
6713 int rc;
6714 u8 status, newlevel;
6715
6716 if (parse_strtoul(buf, 255, &s))
6717 return -EINVAL;
6718
6719 tpacpi_disclose_usertask("hwmon pwm1",
6720 "set fan speed to %lu\n", s);
6721
6722 /* scale down from 0-255 to 0-7 */
6723 newlevel = (s >> 5) & 0x07;
6724
6725 if (mutex_lock_killable(&fan_mutex))
6726 return -ERESTARTSYS;
6727
6728 rc = fan_get_status(&status);
6729 if (!rc && (status &
6730 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
6731 rc = fan_set_level(newlevel);
6732 if (rc == -ENXIO)
6733 rc = -EINVAL;
6734 else if (!rc) {
6735 fan_update_desired_level(newlevel);
6736 fan_watchdog_reset();
6737 }
6738 }
6739
6740 mutex_unlock(&fan_mutex);
6741 return (rc)? rc : count;
6742 }
6743
6744 static struct device_attribute dev_attr_fan_pwm1 =
6745 __ATTR(pwm1, S_IWUSR | S_IRUGO,
6746 fan_pwm1_show, fan_pwm1_store);
6747
6748 /* sysfs fan fan1_input ------------------------------------------------ */
6749 static ssize_t fan_fan1_input_show(struct device *dev,
6750 struct device_attribute *attr,
6751 char *buf)
6752 {
6753 int res;
6754 unsigned int speed;
6755
6756 res = fan_get_speed(&speed);
6757 if (res < 0)
6758 return res;
6759
6760 return snprintf(buf, PAGE_SIZE, "%u\n", speed);
6761 }
6762
6763 static struct device_attribute dev_attr_fan_fan1_input =
6764 __ATTR(fan1_input, S_IRUGO,
6765 fan_fan1_input_show, NULL);
6766
6767 /* sysfs fan fan_watchdog (hwmon driver) ------------------------------- */
6768 static ssize_t fan_fan_watchdog_show(struct device_driver *drv,
6769 char *buf)
6770 {
6771 return snprintf(buf, PAGE_SIZE, "%u\n", fan_watchdog_maxinterval);
6772 }
6773
6774 static ssize_t fan_fan_watchdog_store(struct device_driver *drv,
6775 const char *buf, size_t count)
6776 {
6777 unsigned long t;
6778
6779 if (parse_strtoul(buf, 120, &t))
6780 return -EINVAL;
6781
6782 if (!fan_control_allowed)
6783 return -EPERM;
6784
6785 fan_watchdog_maxinterval = t;
6786 fan_watchdog_reset();
6787
6788 tpacpi_disclose_usertask("fan_watchdog", "set to %lu\n", t);
6789
6790 return count;
6791 }
6792
6793 static DRIVER_ATTR(fan_watchdog, S_IWUSR | S_IRUGO,
6794 fan_fan_watchdog_show, fan_fan_watchdog_store);
6795
6796 /* --------------------------------------------------------------------- */
6797 static struct attribute *fan_attributes[] = {
6798 &dev_attr_fan_pwm1_enable.attr, &dev_attr_fan_pwm1.attr,
6799 &dev_attr_fan_fan1_input.attr,
6800 NULL
6801 };
6802
6803 static const struct attribute_group fan_attr_group = {
6804 .attrs = fan_attributes,
6805 };
6806
6807 static int __init fan_init(struct ibm_init_struct *iibm)
6808 {
6809 int rc;
6810
6811 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
6812 "initializing fan subdriver\n");
6813
6814 mutex_init(&fan_mutex);
6815 fan_status_access_mode = TPACPI_FAN_NONE;
6816 fan_control_access_mode = TPACPI_FAN_WR_NONE;
6817 fan_control_commands = 0;
6818 fan_watchdog_maxinterval = 0;
6819 tp_features.fan_ctrl_status_undef = 0;
6820 fan_control_desired_level = 7;
6821
6822 TPACPI_ACPIHANDLE_INIT(fans);
6823 TPACPI_ACPIHANDLE_INIT(gfan);
6824 TPACPI_ACPIHANDLE_INIT(sfan);
6825
6826 if (gfan_handle) {
6827 /* 570, 600e/x, 770e, 770x */
6828 fan_status_access_mode = TPACPI_FAN_RD_ACPI_GFAN;
6829 } else {
6830 /* all other ThinkPads: note that even old-style
6831 * ThinkPad ECs supports the fan control register */
6832 if (likely(acpi_ec_read(fan_status_offset,
6833 &fan_control_initial_status))) {
6834 fan_status_access_mode = TPACPI_FAN_RD_TPEC;
6835 fan_quirk1_detect();
6836 } else {
6837 printk(TPACPI_ERR
6838 "ThinkPad ACPI EC access misbehaving, "
6839 "fan status and control unavailable\n");
6840 return 1;
6841 }
6842 }
6843
6844 if (sfan_handle) {
6845 /* 570, 770x-JL */
6846 fan_control_access_mode = TPACPI_FAN_WR_ACPI_SFAN;
6847 fan_control_commands |=
6848 TPACPI_FAN_CMD_LEVEL | TPACPI_FAN_CMD_ENABLE;
6849 } else {
6850 if (!gfan_handle) {
6851 /* gfan without sfan means no fan control */
6852 /* all other models implement TP EC 0x2f control */
6853
6854 if (fans_handle) {
6855 /* X31, X40, X41 */
6856 fan_control_access_mode =
6857 TPACPI_FAN_WR_ACPI_FANS;
6858 fan_control_commands |=
6859 TPACPI_FAN_CMD_SPEED |
6860 TPACPI_FAN_CMD_LEVEL |
6861 TPACPI_FAN_CMD_ENABLE;
6862 } else {
6863 fan_control_access_mode = TPACPI_FAN_WR_TPEC;
6864 fan_control_commands |=
6865 TPACPI_FAN_CMD_LEVEL |
6866 TPACPI_FAN_CMD_ENABLE;
6867 }
6868 }
6869 }
6870
6871 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
6872 "fan is %s, modes %d, %d\n",
6873 str_supported(fan_status_access_mode != TPACPI_FAN_NONE ||
6874 fan_control_access_mode != TPACPI_FAN_WR_NONE),
6875 fan_status_access_mode, fan_control_access_mode);
6876
6877 /* fan control master switch */
6878 if (!fan_control_allowed) {
6879 fan_control_access_mode = TPACPI_FAN_WR_NONE;
6880 fan_control_commands = 0;
6881 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
6882 "fan control features disabled by parameter\n");
6883 }
6884
6885 /* update fan_control_desired_level */
6886 if (fan_status_access_mode != TPACPI_FAN_NONE)
6887 fan_get_status_safe(NULL);
6888
6889 if (fan_status_access_mode != TPACPI_FAN_NONE ||
6890 fan_control_access_mode != TPACPI_FAN_WR_NONE) {
6891 rc = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
6892 &fan_attr_group);
6893 if (rc < 0)
6894 return rc;
6895
6896 rc = driver_create_file(&tpacpi_hwmon_pdriver.driver,
6897 &driver_attr_fan_watchdog);
6898 if (rc < 0) {
6899 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
6900 &fan_attr_group);
6901 return rc;
6902 }
6903 return 0;
6904 } else
6905 return 1;
6906 }
6907
6908 static void fan_exit(void)
6909 {
6910 vdbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_FAN,
6911 "cancelling any pending fan watchdog tasks\n");
6912
6913 /* FIXME: can we really do this unconditionally? */
6914 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj, &fan_attr_group);
6915 driver_remove_file(&tpacpi_hwmon_pdriver.driver,
6916 &driver_attr_fan_watchdog);
6917
6918 cancel_delayed_work(&fan_watchdog_task);
6919 flush_workqueue(tpacpi_wq);
6920 }
6921
6922 static void fan_suspend(pm_message_t state)
6923 {
6924 int rc;
6925
6926 if (!fan_control_allowed)
6927 return;
6928
6929 /* Store fan status in cache */
6930 fan_control_resume_level = 0;
6931 rc = fan_get_status_safe(&fan_control_resume_level);
6932 if (rc < 0)
6933 printk(TPACPI_NOTICE
6934 "failed to read fan level for later "
6935 "restore during resume: %d\n", rc);
6936
6937 /* if it is undefined, don't attempt to restore it.
6938 * KEEP THIS LAST */
6939 if (tp_features.fan_ctrl_status_undef)
6940 fan_control_resume_level = 0;
6941 }
6942
6943 static void fan_resume(void)
6944 {
6945 u8 current_level = 7;
6946 bool do_set = false;
6947 int rc;
6948
6949 /* DSDT *always* updates status on resume */
6950 tp_features.fan_ctrl_status_undef = 0;
6951
6952 if (!fan_control_allowed ||
6953 !fan_control_resume_level ||
6954 (fan_get_status_safe(&current_level) < 0))
6955 return;
6956
6957 switch (fan_control_access_mode) {
6958 case TPACPI_FAN_WR_ACPI_SFAN:
6959 /* never decrease fan level */
6960 do_set = (fan_control_resume_level > current_level);
6961 break;
6962 case TPACPI_FAN_WR_ACPI_FANS:
6963 case TPACPI_FAN_WR_TPEC:
6964 /* never decrease fan level, scale is:
6965 * TP_EC_FAN_FULLSPEED > 7 >= TP_EC_FAN_AUTO
6966 *
6967 * We expect the firmware to set either 7 or AUTO, but we
6968 * handle FULLSPEED out of paranoia.
6969 *
6970 * So, we can safely only restore FULLSPEED or 7, anything
6971 * else could slow the fan. Restoring AUTO is useless, at
6972 * best that's exactly what the DSDT already set (it is the
6973 * slower it uses).
6974 *
6975 * Always keep in mind that the DSDT *will* have set the
6976 * fans to what the vendor supposes is the best level. We
6977 * muck with it only to speed the fan up.
6978 */
6979 if (fan_control_resume_level != 7 &&
6980 !(fan_control_resume_level & TP_EC_FAN_FULLSPEED))
6981 return;
6982 else
6983 do_set = !(current_level & TP_EC_FAN_FULLSPEED) &&
6984 (current_level != fan_control_resume_level);
6985 break;
6986 default:
6987 return;
6988 }
6989 if (do_set) {
6990 printk(TPACPI_NOTICE
6991 "restoring fan level to 0x%02x\n",
6992 fan_control_resume_level);
6993 rc = fan_set_level_safe(fan_control_resume_level);
6994 if (rc < 0)
6995 printk(TPACPI_NOTICE
6996 "failed to restore fan level: %d\n", rc);
6997 }
6998 }
6999
7000 static int fan_read(char *p)
7001 {
7002 int len = 0;
7003 int rc;
7004 u8 status;
7005 unsigned int speed = 0;
7006
7007 switch (fan_status_access_mode) {
7008 case TPACPI_FAN_RD_ACPI_GFAN:
7009 /* 570, 600e/x, 770e, 770x */
7010 rc = fan_get_status_safe(&status);
7011 if (rc < 0)
7012 return rc;
7013
7014 len += sprintf(p + len, "status:\t\t%s\n"
7015 "level:\t\t%d\n",
7016 (status != 0) ? "enabled" : "disabled", status);
7017 break;
7018
7019 case TPACPI_FAN_RD_TPEC:
7020 /* all except 570, 600e/x, 770e, 770x */
7021 rc = fan_get_status_safe(&status);
7022 if (rc < 0)
7023 return rc;
7024
7025 len += sprintf(p + len, "status:\t\t%s\n",
7026 (status != 0) ? "enabled" : "disabled");
7027
7028 rc = fan_get_speed(&speed);
7029 if (rc < 0)
7030 return rc;
7031
7032 len += sprintf(p + len, "speed:\t\t%d\n", speed);
7033
7034 if (status & TP_EC_FAN_FULLSPEED)
7035 /* Disengaged mode takes precedence */
7036 len += sprintf(p + len, "level:\t\tdisengaged\n");
7037 else if (status & TP_EC_FAN_AUTO)
7038 len += sprintf(p + len, "level:\t\tauto\n");
7039 else
7040 len += sprintf(p + len, "level:\t\t%d\n", status);
7041 break;
7042
7043 case TPACPI_FAN_NONE:
7044 default:
7045 len += sprintf(p + len, "status:\t\tnot supported\n");
7046 }
7047
7048 if (fan_control_commands & TPACPI_FAN_CMD_LEVEL) {
7049 len += sprintf(p + len, "commands:\tlevel <level>");
7050
7051 switch (fan_control_access_mode) {
7052 case TPACPI_FAN_WR_ACPI_SFAN:
7053 len += sprintf(p + len, " (<level> is 0-7)\n");
7054 break;
7055
7056 default:
7057 len += sprintf(p + len, " (<level> is 0-7, "
7058 "auto, disengaged, full-speed)\n");
7059 break;
7060 }
7061 }
7062
7063 if (fan_control_commands & TPACPI_FAN_CMD_ENABLE)
7064 len += sprintf(p + len, "commands:\tenable, disable\n"
7065 "commands:\twatchdog <timeout> (<timeout> "
7066 "is 0 (off), 1-120 (seconds))\n");
7067
7068 if (fan_control_commands & TPACPI_FAN_CMD_SPEED)
7069 len += sprintf(p + len, "commands:\tspeed <speed>"
7070 " (<speed> is 0-65535)\n");
7071
7072 return len;
7073 }
7074
7075 static int fan_write_cmd_level(const char *cmd, int *rc)
7076 {
7077 int level;
7078
7079 if (strlencmp(cmd, "level auto") == 0)
7080 level = TP_EC_FAN_AUTO;
7081 else if ((strlencmp(cmd, "level disengaged") == 0) |
7082 (strlencmp(cmd, "level full-speed") == 0))
7083 level = TP_EC_FAN_FULLSPEED;
7084 else if (sscanf(cmd, "level %d", &level) != 1)
7085 return 0;
7086
7087 *rc = fan_set_level_safe(level);
7088 if (*rc == -ENXIO)
7089 printk(TPACPI_ERR "level command accepted for unsupported "
7090 "access mode %d", fan_control_access_mode);
7091 else if (!*rc)
7092 tpacpi_disclose_usertask("procfs fan",
7093 "set level to %d\n", level);
7094
7095 return 1;
7096 }
7097
7098 static int fan_write_cmd_enable(const char *cmd, int *rc)
7099 {
7100 if (strlencmp(cmd, "enable") != 0)
7101 return 0;
7102
7103 *rc = fan_set_enable();
7104 if (*rc == -ENXIO)
7105 printk(TPACPI_ERR "enable command accepted for unsupported "
7106 "access mode %d", fan_control_access_mode);
7107 else if (!*rc)
7108 tpacpi_disclose_usertask("procfs fan", "enable\n");
7109
7110 return 1;
7111 }
7112
7113 static int fan_write_cmd_disable(const char *cmd, int *rc)
7114 {
7115 if (strlencmp(cmd, "disable") != 0)
7116 return 0;
7117
7118 *rc = fan_set_disable();
7119 if (*rc == -ENXIO)
7120 printk(TPACPI_ERR "disable command accepted for unsupported "
7121 "access mode %d", fan_control_access_mode);
7122 else if (!*rc)
7123 tpacpi_disclose_usertask("procfs fan", "disable\n");
7124
7125 return 1;
7126 }
7127
7128 static int fan_write_cmd_speed(const char *cmd, int *rc)
7129 {
7130 int speed;
7131
7132 /* TODO:
7133 * Support speed <low> <medium> <high> ? */
7134
7135 if (sscanf(cmd, "speed %d", &speed) != 1)
7136 return 0;
7137
7138 *rc = fan_set_speed(speed);
7139 if (*rc == -ENXIO)
7140 printk(TPACPI_ERR "speed command accepted for unsupported "
7141 "access mode %d", fan_control_access_mode);
7142 else if (!*rc)
7143 tpacpi_disclose_usertask("procfs fan",
7144 "set speed to %d\n", speed);
7145
7146 return 1;
7147 }
7148
7149 static int fan_write_cmd_watchdog(const char *cmd, int *rc)
7150 {
7151 int interval;
7152
7153 if (sscanf(cmd, "watchdog %d", &interval) != 1)
7154 return 0;
7155
7156 if (interval < 0 || interval > 120)
7157 *rc = -EINVAL;
7158 else {
7159 fan_watchdog_maxinterval = interval;
7160 tpacpi_disclose_usertask("procfs fan",
7161 "set watchdog timer to %d\n",
7162 interval);
7163 }
7164
7165 return 1;
7166 }
7167
7168 static int fan_write(char *buf)
7169 {
7170 char *cmd;
7171 int rc = 0;
7172
7173 while (!rc && (cmd = next_cmd(&buf))) {
7174 if (!((fan_control_commands & TPACPI_FAN_CMD_LEVEL) &&
7175 fan_write_cmd_level(cmd, &rc)) &&
7176 !((fan_control_commands & TPACPI_FAN_CMD_ENABLE) &&
7177 (fan_write_cmd_enable(cmd, &rc) ||
7178 fan_write_cmd_disable(cmd, &rc) ||
7179 fan_write_cmd_watchdog(cmd, &rc))) &&
7180 !((fan_control_commands & TPACPI_FAN_CMD_SPEED) &&
7181 fan_write_cmd_speed(cmd, &rc))
7182 )
7183 rc = -EINVAL;
7184 else if (!rc)
7185 fan_watchdog_reset();
7186 }
7187
7188 return rc;
7189 }
7190
7191 static struct ibm_struct fan_driver_data = {
7192 .name = "fan",
7193 .read = fan_read,
7194 .write = fan_write,
7195 .exit = fan_exit,
7196 .suspend = fan_suspend,
7197 .resume = fan_resume,
7198 };
7199
7200 /****************************************************************************
7201 ****************************************************************************
7202 *
7203 * Infrastructure
7204 *
7205 ****************************************************************************
7206 ****************************************************************************/
7207
7208 /* sysfs name ---------------------------------------------------------- */
7209 static ssize_t thinkpad_acpi_pdev_name_show(struct device *dev,
7210 struct device_attribute *attr,
7211 char *buf)
7212 {
7213 return snprintf(buf, PAGE_SIZE, "%s\n", TPACPI_NAME);
7214 }
7215
7216 static struct device_attribute dev_attr_thinkpad_acpi_pdev_name =
7217 __ATTR(name, S_IRUGO, thinkpad_acpi_pdev_name_show, NULL);
7218
7219 /* --------------------------------------------------------------------- */
7220
7221 /* /proc support */
7222 static struct proc_dir_entry *proc_dir;
7223
7224 /*
7225 * Module and infrastructure proble, init and exit handling
7226 */
7227
7228 static int force_load;
7229
7230 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
7231 static const char * __init str_supported(int is_supported)
7232 {
7233 static char text_unsupported[] __initdata = "not supported";
7234
7235 return (is_supported)? &text_unsupported[4] : &text_unsupported[0];
7236 }
7237 #endif /* CONFIG_THINKPAD_ACPI_DEBUG */
7238
7239 static void ibm_exit(struct ibm_struct *ibm)
7240 {
7241 dbg_printk(TPACPI_DBG_EXIT, "removing %s\n", ibm->name);
7242
7243 list_del_init(&ibm->all_drivers);
7244
7245 if (ibm->flags.acpi_notify_installed) {
7246 dbg_printk(TPACPI_DBG_EXIT,
7247 "%s: acpi_remove_notify_handler\n", ibm->name);
7248 BUG_ON(!ibm->acpi);
7249 acpi_remove_notify_handler(*ibm->acpi->handle,
7250 ibm->acpi->type,
7251 dispatch_acpi_notify);
7252 ibm->flags.acpi_notify_installed = 0;
7253 ibm->flags.acpi_notify_installed = 0;
7254 }
7255
7256 if (ibm->flags.proc_created) {
7257 dbg_printk(TPACPI_DBG_EXIT,
7258 "%s: remove_proc_entry\n", ibm->name);
7259 remove_proc_entry(ibm->name, proc_dir);
7260 ibm->flags.proc_created = 0;
7261 }
7262
7263 if (ibm->flags.acpi_driver_registered) {
7264 dbg_printk(TPACPI_DBG_EXIT,
7265 "%s: acpi_bus_unregister_driver\n", ibm->name);
7266 BUG_ON(!ibm->acpi);
7267 acpi_bus_unregister_driver(ibm->acpi->driver);
7268 kfree(ibm->acpi->driver);
7269 ibm->acpi->driver = NULL;
7270 ibm->flags.acpi_driver_registered = 0;
7271 }
7272
7273 if (ibm->flags.init_called && ibm->exit) {
7274 ibm->exit();
7275 ibm->flags.init_called = 0;
7276 }
7277
7278 dbg_printk(TPACPI_DBG_INIT, "finished removing %s\n", ibm->name);
7279 }
7280
7281 static int __init ibm_init(struct ibm_init_struct *iibm)
7282 {
7283 int ret;
7284 struct ibm_struct *ibm = iibm->data;
7285 struct proc_dir_entry *entry;
7286
7287 BUG_ON(ibm == NULL);
7288
7289 INIT_LIST_HEAD(&ibm->all_drivers);
7290
7291 if (ibm->flags.experimental && !experimental)
7292 return 0;
7293
7294 dbg_printk(TPACPI_DBG_INIT,
7295 "probing for %s\n", ibm->name);
7296
7297 if (iibm->init) {
7298 ret = iibm->init(iibm);
7299 if (ret > 0)
7300 return 0; /* probe failed */
7301 if (ret)
7302 return ret;
7303
7304 ibm->flags.init_called = 1;
7305 }
7306
7307 if (ibm->acpi) {
7308 if (ibm->acpi->hid) {
7309 ret = register_tpacpi_subdriver(ibm);
7310 if (ret)
7311 goto err_out;
7312 }
7313
7314 if (ibm->acpi->notify) {
7315 ret = setup_acpi_notify(ibm);
7316 if (ret == -ENODEV) {
7317 printk(TPACPI_NOTICE "disabling subdriver %s\n",
7318 ibm->name);
7319 ret = 0;
7320 goto err_out;
7321 }
7322 if (ret < 0)
7323 goto err_out;
7324 }
7325 }
7326
7327 dbg_printk(TPACPI_DBG_INIT,
7328 "%s installed\n", ibm->name);
7329
7330 if (ibm->read) {
7331 entry = create_proc_entry(ibm->name,
7332 S_IFREG | S_IRUGO | S_IWUSR,
7333 proc_dir);
7334 if (!entry) {
7335 printk(TPACPI_ERR "unable to create proc entry %s\n",
7336 ibm->name);
7337 ret = -ENODEV;
7338 goto err_out;
7339 }
7340 entry->data = ibm;
7341 entry->read_proc = &dispatch_procfs_read;
7342 if (ibm->write)
7343 entry->write_proc = &dispatch_procfs_write;
7344 ibm->flags.proc_created = 1;
7345 }
7346
7347 list_add_tail(&ibm->all_drivers, &tpacpi_all_drivers);
7348
7349 return 0;
7350
7351 err_out:
7352 dbg_printk(TPACPI_DBG_INIT,
7353 "%s: at error exit path with result %d\n",
7354 ibm->name, ret);
7355
7356 ibm_exit(ibm);
7357 return (ret < 0)? ret : 0;
7358 }
7359
7360 /* Probing */
7361
7362 static bool __pure __init tpacpi_is_fw_digit(const char c)
7363 {
7364 return (c >= '0' && c <= '9') || (c >= 'A' && c <= 'Z');
7365 }
7366
7367 /* Most models: xxyTkkWW (#.##c); Ancient 570/600 and -SL lacks (#.##c) */
7368 static bool __pure __init tpacpi_is_valid_fw_id(const char* const s,
7369 const char t)
7370 {
7371 return s && strlen(s) >= 8 &&
7372 tpacpi_is_fw_digit(s[0]) &&
7373 tpacpi_is_fw_digit(s[1]) &&
7374 s[2] == t && s[3] == 'T' &&
7375 tpacpi_is_fw_digit(s[4]) &&
7376 tpacpi_is_fw_digit(s[5]) &&
7377 s[6] == 'W' && s[7] == 'W';
7378 }
7379
7380 /* returns 0 - probe ok, or < 0 - probe error.
7381 * Probe ok doesn't mean thinkpad found.
7382 * On error, kfree() cleanup on tp->* is not performed, caller must do it */
7383 static int __must_check __init get_thinkpad_model_data(
7384 struct thinkpad_id_data *tp)
7385 {
7386 const struct dmi_device *dev = NULL;
7387 char ec_fw_string[18];
7388 char const *s;
7389
7390 if (!tp)
7391 return -EINVAL;
7392
7393 memset(tp, 0, sizeof(*tp));
7394
7395 if (dmi_name_in_vendors("IBM"))
7396 tp->vendor = PCI_VENDOR_ID_IBM;
7397 else if (dmi_name_in_vendors("LENOVO"))
7398 tp->vendor = PCI_VENDOR_ID_LENOVO;
7399 else
7400 return 0;
7401
7402 s = dmi_get_system_info(DMI_BIOS_VERSION);
7403 tp->bios_version_str = kstrdup(s, GFP_KERNEL);
7404 if (s && !tp->bios_version_str)
7405 return -ENOMEM;
7406
7407 /* Really ancient ThinkPad 240X will fail this, which is fine */
7408 if (!tpacpi_is_valid_fw_id(tp->bios_version_str, 'E'))
7409 return 0;
7410
7411 tp->bios_model = tp->bios_version_str[0]
7412 | (tp->bios_version_str[1] << 8);
7413 tp->bios_release = (tp->bios_version_str[4] << 8)
7414 | tp->bios_version_str[5];
7415
7416 /*
7417 * ThinkPad T23 or newer, A31 or newer, R50e or newer,
7418 * X32 or newer, all Z series; Some models must have an
7419 * up-to-date BIOS or they will not be detected.
7420 *
7421 * See http://thinkwiki.org/wiki/List_of_DMI_IDs
7422 */
7423 while ((dev = dmi_find_device(DMI_DEV_TYPE_OEM_STRING, NULL, dev))) {
7424 if (sscanf(dev->name,
7425 "IBM ThinkPad Embedded Controller -[%17c",
7426 ec_fw_string) == 1) {
7427 ec_fw_string[sizeof(ec_fw_string) - 1] = 0;
7428 ec_fw_string[strcspn(ec_fw_string, " ]")] = 0;
7429
7430 tp->ec_version_str = kstrdup(ec_fw_string, GFP_KERNEL);
7431 if (!tp->ec_version_str)
7432 return -ENOMEM;
7433
7434 if (tpacpi_is_valid_fw_id(ec_fw_string, 'H')) {
7435 tp->ec_model = ec_fw_string[0]
7436 | (ec_fw_string[1] << 8);
7437 tp->ec_release = (ec_fw_string[4] << 8)
7438 | ec_fw_string[5];
7439 } else {
7440 printk(TPACPI_NOTICE
7441 "ThinkPad firmware release %s "
7442 "doesn't match the known patterns\n",
7443 ec_fw_string);
7444 printk(TPACPI_NOTICE
7445 "please report this to %s\n",
7446 TPACPI_MAIL);
7447 }
7448 break;
7449 }
7450 }
7451
7452 s = dmi_get_system_info(DMI_PRODUCT_VERSION);
7453 if (s && !strnicmp(s, "ThinkPad", 8)) {
7454 tp->model_str = kstrdup(s, GFP_KERNEL);
7455 if (!tp->model_str)
7456 return -ENOMEM;
7457 }
7458
7459 s = dmi_get_system_info(DMI_PRODUCT_NAME);
7460 tp->nummodel_str = kstrdup(s, GFP_KERNEL);
7461 if (s && !tp->nummodel_str)
7462 return -ENOMEM;
7463
7464 return 0;
7465 }
7466
7467 static int __init probe_for_thinkpad(void)
7468 {
7469 int is_thinkpad;
7470
7471 if (acpi_disabled)
7472 return -ENODEV;
7473
7474 /*
7475 * Non-ancient models have better DMI tagging, but very old models
7476 * don't.
7477 */
7478 is_thinkpad = (thinkpad_id.model_str != NULL);
7479
7480 /* ec is required because many other handles are relative to it */
7481 TPACPI_ACPIHANDLE_INIT(ec);
7482 if (!ec_handle) {
7483 if (is_thinkpad)
7484 printk(TPACPI_ERR
7485 "Not yet supported ThinkPad detected!\n");
7486 return -ENODEV;
7487 }
7488
7489 /*
7490 * Risks a regression on very old machines, but reduces potential
7491 * false positives a damn great deal
7492 */
7493 if (!is_thinkpad)
7494 is_thinkpad = (thinkpad_id.vendor == PCI_VENDOR_ID_IBM);
7495
7496 if (!is_thinkpad && !force_load)
7497 return -ENODEV;
7498
7499 return 0;
7500 }
7501
7502
7503 /* Module init, exit, parameters */
7504
7505 static struct ibm_init_struct ibms_init[] __initdata = {
7506 {
7507 .init = thinkpad_acpi_driver_init,
7508 .data = &thinkpad_acpi_driver_data,
7509 },
7510 {
7511 .init = hotkey_init,
7512 .data = &hotkey_driver_data,
7513 },
7514 {
7515 .init = bluetooth_init,
7516 .data = &bluetooth_driver_data,
7517 },
7518 {
7519 .init = wan_init,
7520 .data = &wan_driver_data,
7521 },
7522 {
7523 .init = uwb_init,
7524 .data = &uwb_driver_data,
7525 },
7526 #ifdef CONFIG_THINKPAD_ACPI_VIDEO
7527 {
7528 .init = video_init,
7529 .data = &video_driver_data,
7530 },
7531 #endif
7532 {
7533 .init = light_init,
7534 .data = &light_driver_data,
7535 },
7536 #ifdef CONFIG_THINKPAD_ACPI_DOCK
7537 {
7538 .init = dock_init,
7539 .data = &dock_driver_data[0],
7540 },
7541 {
7542 .init = dock_init2,
7543 .data = &dock_driver_data[1],
7544 },
7545 #endif
7546 #ifdef CONFIG_THINKPAD_ACPI_BAY
7547 {
7548 .init = bay_init,
7549 .data = &bay_driver_data,
7550 },
7551 #endif
7552 {
7553 .init = cmos_init,
7554 .data = &cmos_driver_data,
7555 },
7556 {
7557 .init = led_init,
7558 .data = &led_driver_data,
7559 },
7560 {
7561 .init = beep_init,
7562 .data = &beep_driver_data,
7563 },
7564 {
7565 .init = thermal_init,
7566 .data = &thermal_driver_data,
7567 },
7568 {
7569 .data = &ecdump_driver_data,
7570 },
7571 {
7572 .init = brightness_init,
7573 .data = &brightness_driver_data,
7574 },
7575 {
7576 .data = &volume_driver_data,
7577 },
7578 {
7579 .init = fan_init,
7580 .data = &fan_driver_data,
7581 },
7582 };
7583
7584 static int __init set_ibm_param(const char *val, struct kernel_param *kp)
7585 {
7586 unsigned int i;
7587 struct ibm_struct *ibm;
7588
7589 if (!kp || !kp->name || !val)
7590 return -EINVAL;
7591
7592 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
7593 ibm = ibms_init[i].data;
7594 WARN_ON(ibm == NULL);
7595
7596 if (!ibm || !ibm->name)
7597 continue;
7598
7599 if (strcmp(ibm->name, kp->name) == 0 && ibm->write) {
7600 if (strlen(val) > sizeof(ibms_init[i].param) - 2)
7601 return -ENOSPC;
7602 strcpy(ibms_init[i].param, val);
7603 strcat(ibms_init[i].param, ",");
7604 return 0;
7605 }
7606 }
7607
7608 return -EINVAL;
7609 }
7610
7611 module_param(experimental, int, 0);
7612 MODULE_PARM_DESC(experimental,
7613 "Enables experimental features when non-zero");
7614
7615 module_param_named(debug, dbg_level, uint, 0);
7616 MODULE_PARM_DESC(debug, "Sets debug level bit-mask");
7617
7618 module_param(force_load, bool, 0);
7619 MODULE_PARM_DESC(force_load,
7620 "Attempts to load the driver even on a "
7621 "mis-identified ThinkPad when true");
7622
7623 module_param_named(fan_control, fan_control_allowed, bool, 0);
7624 MODULE_PARM_DESC(fan_control,
7625 "Enables setting fan parameters features when true");
7626
7627 module_param_named(brightness_mode, brightness_mode, uint, 0);
7628 MODULE_PARM_DESC(brightness_mode,
7629 "Selects brightness control strategy: "
7630 "0=auto, 1=EC, 2=UCMS, 3=EC+NVRAM");
7631
7632 module_param(brightness_enable, uint, 0);
7633 MODULE_PARM_DESC(brightness_enable,
7634 "Enables backlight control when 1, disables when 0");
7635
7636 module_param(hotkey_report_mode, uint, 0);
7637 MODULE_PARM_DESC(hotkey_report_mode,
7638 "used for backwards compatibility with userspace, "
7639 "see documentation");
7640
7641 #define TPACPI_PARAM(feature) \
7642 module_param_call(feature, set_ibm_param, NULL, NULL, 0); \
7643 MODULE_PARM_DESC(feature, "Simulates thinkpad-acpi procfs command " \
7644 "at module load, see documentation")
7645
7646 TPACPI_PARAM(hotkey);
7647 TPACPI_PARAM(bluetooth);
7648 TPACPI_PARAM(video);
7649 TPACPI_PARAM(light);
7650 #ifdef CONFIG_THINKPAD_ACPI_DOCK
7651 TPACPI_PARAM(dock);
7652 #endif
7653 #ifdef CONFIG_THINKPAD_ACPI_BAY
7654 TPACPI_PARAM(bay);
7655 #endif /* CONFIG_THINKPAD_ACPI_BAY */
7656 TPACPI_PARAM(cmos);
7657 TPACPI_PARAM(led);
7658 TPACPI_PARAM(beep);
7659 TPACPI_PARAM(ecdump);
7660 TPACPI_PARAM(brightness);
7661 TPACPI_PARAM(volume);
7662 TPACPI_PARAM(fan);
7663
7664 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
7665 module_param(dbg_wlswemul, uint, 0);
7666 MODULE_PARM_DESC(dbg_wlswemul, "Enables WLSW emulation");
7667 module_param_named(wlsw_state, tpacpi_wlsw_emulstate, bool, 0);
7668 MODULE_PARM_DESC(wlsw_state,
7669 "Initial state of the emulated WLSW switch");
7670
7671 module_param(dbg_bluetoothemul, uint, 0);
7672 MODULE_PARM_DESC(dbg_bluetoothemul, "Enables bluetooth switch emulation");
7673 module_param_named(bluetooth_state, tpacpi_bluetooth_emulstate, bool, 0);
7674 MODULE_PARM_DESC(bluetooth_state,
7675 "Initial state of the emulated bluetooth switch");
7676
7677 module_param(dbg_wwanemul, uint, 0);
7678 MODULE_PARM_DESC(dbg_wwanemul, "Enables WWAN switch emulation");
7679 module_param_named(wwan_state, tpacpi_wwan_emulstate, bool, 0);
7680 MODULE_PARM_DESC(wwan_state,
7681 "Initial state of the emulated WWAN switch");
7682
7683 module_param(dbg_uwbemul, uint, 0);
7684 MODULE_PARM_DESC(dbg_uwbemul, "Enables UWB switch emulation");
7685 module_param_named(uwb_state, tpacpi_uwb_emulstate, bool, 0);
7686 MODULE_PARM_DESC(uwb_state,
7687 "Initial state of the emulated UWB switch");
7688 #endif
7689
7690 static void thinkpad_acpi_module_exit(void)
7691 {
7692 struct ibm_struct *ibm, *itmp;
7693
7694 tpacpi_lifecycle = TPACPI_LIFE_EXITING;
7695
7696 list_for_each_entry_safe_reverse(ibm, itmp,
7697 &tpacpi_all_drivers,
7698 all_drivers) {
7699 ibm_exit(ibm);
7700 }
7701
7702 dbg_printk(TPACPI_DBG_INIT, "finished subdriver exit path...\n");
7703
7704 if (tpacpi_inputdev) {
7705 if (tp_features.input_device_registered)
7706 input_unregister_device(tpacpi_inputdev);
7707 else
7708 input_free_device(tpacpi_inputdev);
7709 }
7710
7711 if (tpacpi_hwmon)
7712 hwmon_device_unregister(tpacpi_hwmon);
7713
7714 if (tp_features.sensors_pdev_attrs_registered)
7715 device_remove_file(&tpacpi_sensors_pdev->dev,
7716 &dev_attr_thinkpad_acpi_pdev_name);
7717 if (tpacpi_sensors_pdev)
7718 platform_device_unregister(tpacpi_sensors_pdev);
7719 if (tpacpi_pdev)
7720 platform_device_unregister(tpacpi_pdev);
7721
7722 if (tp_features.sensors_pdrv_attrs_registered)
7723 tpacpi_remove_driver_attributes(&tpacpi_hwmon_pdriver.driver);
7724 if (tp_features.platform_drv_attrs_registered)
7725 tpacpi_remove_driver_attributes(&tpacpi_pdriver.driver);
7726
7727 if (tp_features.sensors_pdrv_registered)
7728 platform_driver_unregister(&tpacpi_hwmon_pdriver);
7729
7730 if (tp_features.platform_drv_registered)
7731 platform_driver_unregister(&tpacpi_pdriver);
7732
7733 if (proc_dir)
7734 remove_proc_entry(TPACPI_PROC_DIR, acpi_root_dir);
7735
7736 if (tpacpi_wq)
7737 destroy_workqueue(tpacpi_wq);
7738
7739 kfree(thinkpad_id.bios_version_str);
7740 kfree(thinkpad_id.ec_version_str);
7741 kfree(thinkpad_id.model_str);
7742 }
7743
7744
7745 static int __init thinkpad_acpi_module_init(void)
7746 {
7747 int ret, i;
7748
7749 tpacpi_lifecycle = TPACPI_LIFE_INIT;
7750
7751 /* Parameter checking */
7752 if (hotkey_report_mode > 2)
7753 return -EINVAL;
7754
7755 /* Driver-level probe */
7756
7757 ret = get_thinkpad_model_data(&thinkpad_id);
7758 if (ret) {
7759 printk(TPACPI_ERR
7760 "unable to get DMI data: %d\n", ret);
7761 thinkpad_acpi_module_exit();
7762 return ret;
7763 }
7764 ret = probe_for_thinkpad();
7765 if (ret) {
7766 thinkpad_acpi_module_exit();
7767 return ret;
7768 }
7769
7770 /* Driver initialization */
7771
7772 TPACPI_ACPIHANDLE_INIT(ecrd);
7773 TPACPI_ACPIHANDLE_INIT(ecwr);
7774
7775 tpacpi_wq = create_singlethread_workqueue(TPACPI_WORKQUEUE_NAME);
7776 if (!tpacpi_wq) {
7777 thinkpad_acpi_module_exit();
7778 return -ENOMEM;
7779 }
7780
7781 proc_dir = proc_mkdir(TPACPI_PROC_DIR, acpi_root_dir);
7782 if (!proc_dir) {
7783 printk(TPACPI_ERR
7784 "unable to create proc dir " TPACPI_PROC_DIR);
7785 thinkpad_acpi_module_exit();
7786 return -ENODEV;
7787 }
7788
7789 ret = platform_driver_register(&tpacpi_pdriver);
7790 if (ret) {
7791 printk(TPACPI_ERR
7792 "unable to register main platform driver\n");
7793 thinkpad_acpi_module_exit();
7794 return ret;
7795 }
7796 tp_features.platform_drv_registered = 1;
7797
7798 ret = platform_driver_register(&tpacpi_hwmon_pdriver);
7799 if (ret) {
7800 printk(TPACPI_ERR
7801 "unable to register hwmon platform driver\n");
7802 thinkpad_acpi_module_exit();
7803 return ret;
7804 }
7805 tp_features.sensors_pdrv_registered = 1;
7806
7807 ret = tpacpi_create_driver_attributes(&tpacpi_pdriver.driver);
7808 if (!ret) {
7809 tp_features.platform_drv_attrs_registered = 1;
7810 ret = tpacpi_create_driver_attributes(
7811 &tpacpi_hwmon_pdriver.driver);
7812 }
7813 if (ret) {
7814 printk(TPACPI_ERR
7815 "unable to create sysfs driver attributes\n");
7816 thinkpad_acpi_module_exit();
7817 return ret;
7818 }
7819 tp_features.sensors_pdrv_attrs_registered = 1;
7820
7821
7822 /* Device initialization */
7823 tpacpi_pdev = platform_device_register_simple(TPACPI_DRVR_NAME, -1,
7824 NULL, 0);
7825 if (IS_ERR(tpacpi_pdev)) {
7826 ret = PTR_ERR(tpacpi_pdev);
7827 tpacpi_pdev = NULL;
7828 printk(TPACPI_ERR "unable to register platform device\n");
7829 thinkpad_acpi_module_exit();
7830 return ret;
7831 }
7832 tpacpi_sensors_pdev = platform_device_register_simple(
7833 TPACPI_HWMON_DRVR_NAME,
7834 -1, NULL, 0);
7835 if (IS_ERR(tpacpi_sensors_pdev)) {
7836 ret = PTR_ERR(tpacpi_sensors_pdev);
7837 tpacpi_sensors_pdev = NULL;
7838 printk(TPACPI_ERR
7839 "unable to register hwmon platform device\n");
7840 thinkpad_acpi_module_exit();
7841 return ret;
7842 }
7843 ret = device_create_file(&tpacpi_sensors_pdev->dev,
7844 &dev_attr_thinkpad_acpi_pdev_name);
7845 if (ret) {
7846 printk(TPACPI_ERR
7847 "unable to create sysfs hwmon device attributes\n");
7848 thinkpad_acpi_module_exit();
7849 return ret;
7850 }
7851 tp_features.sensors_pdev_attrs_registered = 1;
7852 tpacpi_hwmon = hwmon_device_register(&tpacpi_sensors_pdev->dev);
7853 if (IS_ERR(tpacpi_hwmon)) {
7854 ret = PTR_ERR(tpacpi_hwmon);
7855 tpacpi_hwmon = NULL;
7856 printk(TPACPI_ERR "unable to register hwmon device\n");
7857 thinkpad_acpi_module_exit();
7858 return ret;
7859 }
7860 mutex_init(&tpacpi_inputdev_send_mutex);
7861 tpacpi_inputdev = input_allocate_device();
7862 if (!tpacpi_inputdev) {
7863 printk(TPACPI_ERR "unable to allocate input device\n");
7864 thinkpad_acpi_module_exit();
7865 return -ENOMEM;
7866 } else {
7867 /* Prepare input device, but don't register */
7868 tpacpi_inputdev->name = "ThinkPad Extra Buttons";
7869 tpacpi_inputdev->phys = TPACPI_DRVR_NAME "/input0";
7870 tpacpi_inputdev->id.bustype = BUS_HOST;
7871 tpacpi_inputdev->id.vendor = (thinkpad_id.vendor) ?
7872 thinkpad_id.vendor :
7873 PCI_VENDOR_ID_IBM;
7874 tpacpi_inputdev->id.product = TPACPI_HKEY_INPUT_PRODUCT;
7875 tpacpi_inputdev->id.version = TPACPI_HKEY_INPUT_VERSION;
7876 }
7877 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
7878 ret = ibm_init(&ibms_init[i]);
7879 if (ret >= 0 && *ibms_init[i].param)
7880 ret = ibms_init[i].data->write(ibms_init[i].param);
7881 if (ret < 0) {
7882 thinkpad_acpi_module_exit();
7883 return ret;
7884 }
7885 }
7886 ret = input_register_device(tpacpi_inputdev);
7887 if (ret < 0) {
7888 printk(TPACPI_ERR "unable to register input device\n");
7889 thinkpad_acpi_module_exit();
7890 return ret;
7891 } else {
7892 tp_features.input_device_registered = 1;
7893 }
7894
7895 tpacpi_lifecycle = TPACPI_LIFE_RUNNING;
7896 return 0;
7897 }
7898
7899 MODULE_ALIAS(TPACPI_DRVR_SHORTNAME);
7900
7901 /*
7902 * This will autoload the driver in almost every ThinkPad
7903 * in widespread use.
7904 *
7905 * Only _VERY_ old models, like the 240, 240x and 570 lack
7906 * the HKEY event interface.
7907 */
7908 MODULE_DEVICE_TABLE(acpi, ibm_htk_device_ids);
7909
7910 /*
7911 * DMI matching for module autoloading
7912 *
7913 * See http://thinkwiki.org/wiki/List_of_DMI_IDs
7914 * See http://thinkwiki.org/wiki/BIOS_Upgrade_Downloads
7915 *
7916 * Only models listed in thinkwiki will be supported, so add yours
7917 * if it is not there yet.
7918 */
7919 #define IBM_BIOS_MODULE_ALIAS(__type) \
7920 MODULE_ALIAS("dmi:bvnIBM:bvr" __type "ET??WW*")
7921
7922 /* Ancient thinkpad BIOSes have to be identified by
7923 * BIOS type or model number, and there are far less
7924 * BIOS types than model numbers... */
7925 IBM_BIOS_MODULE_ALIAS("I[MU]"); /* 570, 570e */
7926
7927 MODULE_AUTHOR("Borislav Deianov <borislav@users.sf.net>");
7928 MODULE_AUTHOR("Henrique de Moraes Holschuh <hmh@hmh.eng.br>");
7929 MODULE_DESCRIPTION(TPACPI_DESC);
7930 MODULE_VERSION(TPACPI_VERSION);
7931 MODULE_LICENSE("GPL");
7932
7933 module_init(thinkpad_acpi_module_init);
7934 module_exit(thinkpad_acpi_module_exit);
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree