?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
thinkpad-acpi: enhanced debugging messages for the hotkey subdriver
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / platform / x86 / thinkpad_acpi.c
blob0a4796a246ea13cb34ce214081431e77e63162a4
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 "0.22"
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
195 #define onoff(status, bit) ((status) & (1 << (bit)) ? "on" : "off")
196 #define enabled(status, bit) ((status) & (1 << (bit)) ? "enabled" : "disabled")
197 #define strlencmp(a, b) (strncmp((a), (b), strlen(b)))
198
199
200 /****************************************************************************
201 * Driver-wide structs and misc. variables
202 */
203
204 struct ibm_struct;
205
206 struct tp_acpi_drv_struct {
207 const struct acpi_device_id *hid;
208 struct acpi_driver *driver;
209
210 void (*notify) (struct ibm_struct *, u32);
211 acpi_handle *handle;
212 u32 type;
213 struct acpi_device *device;
214 };
215
216 struct ibm_struct {
217 char *name;
218
219 int (*read) (char *);
220 int (*write) (char *);
221 void (*exit) (void);
222 void (*resume) (void);
223 void (*suspend) (pm_message_t state);
224 void (*shutdown) (void);
225
226 struct list_head all_drivers;
227
228 struct tp_acpi_drv_struct *acpi;
229
230 struct {
231 u8 acpi_driver_registered:1;
232 u8 acpi_notify_installed:1;
233 u8 proc_created:1;
234 u8 init_called:1;
235 u8 experimental:1;
236 } flags;
237 };
238
239 struct ibm_init_struct {
240 char param[32];
241
242 int (*init) (struct ibm_init_struct *);
243 struct ibm_struct *data;
244 };
245
246 static struct {
247 #ifdef CONFIG_THINKPAD_ACPI_BAY
248 u32 bay_status:1;
249 u32 bay_eject:1;
250 u32 bay_status2:1;
251 u32 bay_eject2:1;
252 #endif
253 u32 bluetooth:1;
254 u32 hotkey:1;
255 u32 hotkey_mask:1;
256 u32 hotkey_wlsw:1;
257 u32 hotkey_tablet:1;
258 u32 light:1;
259 u32 light_status:1;
260 u32 bright_16levels:1;
261 u32 bright_acpimode:1;
262 u32 wan:1;
263 u32 uwb:1;
264 u32 fan_ctrl_status_undef:1;
265 u32 input_device_registered:1;
266 u32 platform_drv_registered:1;
267 u32 platform_drv_attrs_registered:1;
268 u32 sensors_pdrv_registered:1;
269 u32 sensors_pdrv_attrs_registered:1;
270 u32 sensors_pdev_attrs_registered:1;
271 u32 hotkey_poll_active:1;
272 } tp_features;
273
274 static struct {
275 u16 hotkey_mask_ff:1;
276 u16 bright_cmos_ec_unsync:1;
277 } tp_warned;
278
279 struct thinkpad_id_data {
280 unsigned int vendor; /* ThinkPad vendor:
281 * PCI_VENDOR_ID_IBM/PCI_VENDOR_ID_LENOVO */
282
283 char *bios_version_str; /* Something like 1ZET51WW (1.03z) */
284 char *ec_version_str; /* Something like 1ZHT51WW-1.04a */
285
286 u16 bios_model; /* Big Endian, TP-1Y = 0x5931, 0 = unknown */
287 u16 ec_model;
288
289 char *model_str; /* ThinkPad T43 */
290 char *nummodel_str; /* 9384A9C for a 9384-A9C model */
291 };
292 static struct thinkpad_id_data thinkpad_id;
293
294 static enum {
295 TPACPI_LIFE_INIT = 0,
296 TPACPI_LIFE_RUNNING,
297 TPACPI_LIFE_EXITING,
298 } tpacpi_lifecycle;
299
300 static int experimental;
301 static u32 dbg_level;
302
303 static struct workqueue_struct *tpacpi_wq;
304
305 /* Special LED class that can defer work */
306 struct tpacpi_led_classdev {
307 struct led_classdev led_classdev;
308 struct work_struct work;
309 enum led_brightness new_brightness;
310 unsigned int led;
311 };
312
313 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
314 static int dbg_wlswemul;
315 static int tpacpi_wlsw_emulstate;
316 static int dbg_bluetoothemul;
317 static int tpacpi_bluetooth_emulstate;
318 static int dbg_wwanemul;
319 static int tpacpi_wwan_emulstate;
320 static int dbg_uwbemul;
321 static int tpacpi_uwb_emulstate;
322 #endif
323
324
325 /*************************************************************************
326 * Debugging helpers
327 */
328
329 #define dbg_printk(a_dbg_level, format, arg...) \
330 do { if (dbg_level & (a_dbg_level)) \
331 printk(TPACPI_DEBUG "%s: " format, __func__ , ## arg); \
332 } while (0)
333
334 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
335 #define vdbg_printk dbg_printk
336 static const char *str_supported(int is_supported);
337 #else
338 #define vdbg_printk(a_dbg_level, format, arg...) \
339 do { } while (0)
340 #endif
341
342 static void tpacpi_log_usertask(const char * const what)
343 {
344 printk(TPACPI_DEBUG "%s: access by process with PID %d\n",
345 what, task_tgid_vnr(current));
346 }
347
348 #define tpacpi_disclose_usertask(what, format, arg...) \
349 do { \
350 if (unlikely( \
351 (dbg_level & TPACPI_DBG_DISCLOSETASK) && \
352 (tpacpi_lifecycle == TPACPI_LIFE_RUNNING))) { \
353 printk(TPACPI_DEBUG "%s: PID %d: " format, \
354 what, task_tgid_vnr(current), ## arg); \
355 } \
356 } while (0)
357
358 /****************************************************************************
359 ****************************************************************************
360 *
361 * ACPI Helpers and device model
362 *
363 ****************************************************************************
364 ****************************************************************************/
365
366 /*************************************************************************
367 * ACPI basic handles
368 */
369
370 static acpi_handle root_handle;
371
372 #define TPACPI_HANDLE(object, parent, paths...) \
373 static acpi_handle object##_handle; \
374 static acpi_handle *object##_parent = &parent##_handle; \
375 static char *object##_path; \
376 static char *object##_paths[] = { paths }
377
378 TPACPI_HANDLE(ec, root, "\\_SB.PCI0.ISA.EC0", /* 240, 240x */
379 "\\_SB.PCI.ISA.EC", /* 570 */
380 "\\_SB.PCI0.ISA0.EC0", /* 600e/x, 770e, 770x */
381 "\\_SB.PCI0.ISA.EC", /* A21e, A2xm/p, T20-22, X20-21 */
382 "\\_SB.PCI0.AD4S.EC0", /* i1400, R30 */
383 "\\_SB.PCI0.ICH3.EC0", /* R31 */
384 "\\_SB.PCI0.LPC.EC", /* all others */
385 );
386
387 TPACPI_HANDLE(ecrd, ec, "ECRD"); /* 570 */
388 TPACPI_HANDLE(ecwr, ec, "ECWR"); /* 570 */
389
390 TPACPI_HANDLE(cmos, root, "\\UCMS", /* R50, R50e, R50p, R51, */
391 /* T4x, X31, X40 */
392 "\\CMOS", /* A3x, G4x, R32, T23, T30, X22-24, X30 */
393 "\\CMS", /* R40, R40e */
394 ); /* all others */
395
396 TPACPI_HANDLE(hkey, ec, "\\_SB.HKEY", /* 600e/x, 770e, 770x */
397 "^HKEY", /* R30, R31 */
398 "HKEY", /* all others */
399 ); /* 570 */
400
401 TPACPI_HANDLE(vid, root, "\\_SB.PCI.AGP.VGA", /* 570 */
402 "\\_SB.PCI0.AGP0.VID0", /* 600e/x, 770x */
403 "\\_SB.PCI0.VID0", /* 770e */
404 "\\_SB.PCI0.VID", /* A21e, G4x, R50e, X30, X40 */
405 "\\_SB.PCI0.AGP.VID", /* all others */
406 ); /* R30, R31 */
407
408
409 /*************************************************************************
410 * ACPI helpers
411 */
412
413 static int acpi_evalf(acpi_handle handle,
414 void *res, char *method, char *fmt, ...)
415 {
416 char *fmt0 = fmt;
417 struct acpi_object_list params;
418 union acpi_object in_objs[TPACPI_MAX_ACPI_ARGS];
419 struct acpi_buffer result, *resultp;
420 union acpi_object out_obj;
421 acpi_status status;
422 va_list ap;
423 char res_type;
424 int success;
425 int quiet;
426
427 if (!*fmt) {
428 printk(TPACPI_ERR "acpi_evalf() called with empty format\n");
429 return 0;
430 }
431
432 if (*fmt == 'q') {
433 quiet = 1;
434 fmt++;
435 } else
436 quiet = 0;
437
438 res_type = *(fmt++);
439
440 params.count = 0;
441 params.pointer = &in_objs[0];
442
443 va_start(ap, fmt);
444 while (*fmt) {
445 char c = *(fmt++);
446 switch (c) {
447 case 'd': /* int */
448 in_objs[params.count].integer.value = va_arg(ap, int);
449 in_objs[params.count++].type = ACPI_TYPE_INTEGER;
450 break;
451 /* add more types as needed */
452 default:
453 printk(TPACPI_ERR "acpi_evalf() called "
454 "with invalid format character '%c'\n", c);
455 return 0;
456 }
457 }
458 va_end(ap);
459
460 if (res_type != 'v') {
461 result.length = sizeof(out_obj);
462 result.pointer = &out_obj;
463 resultp = &result;
464 } else
465 resultp = NULL;
466
467 status = acpi_evaluate_object(handle, method, &params, resultp);
468
469 switch (res_type) {
470 case 'd': /* int */
471 if (res)
472 *(int *)res = out_obj.integer.value;
473 success = status == AE_OK && out_obj.type == ACPI_TYPE_INTEGER;
474 break;
475 case 'v': /* void */
476 success = status == AE_OK;
477 break;
478 /* add more types as needed */
479 default:
480 printk(TPACPI_ERR "acpi_evalf() called "
481 "with invalid format character '%c'\n", res_type);
482 return 0;
483 }
484
485 if (!success && !quiet)
486 printk(TPACPI_ERR "acpi_evalf(%s, %s, ...) failed: %d\n",
487 method, fmt0, status);
488
489 return success;
490 }
491
492 static int acpi_ec_read(int i, u8 *p)
493 {
494 int v;
495
496 if (ecrd_handle) {
497 if (!acpi_evalf(ecrd_handle, &v, NULL, "dd", i))
498 return 0;
499 *p = v;
500 } else {
501 if (ec_read(i, p) < 0)
502 return 0;
503 }
504
505 return 1;
506 }
507
508 static int acpi_ec_write(int i, u8 v)
509 {
510 if (ecwr_handle) {
511 if (!acpi_evalf(ecwr_handle, NULL, NULL, "vdd", i, v))
512 return 0;
513 } else {
514 if (ec_write(i, v) < 0)
515 return 0;
516 }
517
518 return 1;
519 }
520
521 #if defined(CONFIG_THINKPAD_ACPI_DOCK) || defined(CONFIG_THINKPAD_ACPI_BAY)
522 static int _sta(acpi_handle handle)
523 {
524 int status;
525
526 if (!handle || !acpi_evalf(handle, &status, "_STA", "d"))
527 status = 0;
528
529 return status;
530 }
531 #endif
532
533 static int issue_thinkpad_cmos_command(int cmos_cmd)
534 {
535 if (!cmos_handle)
536 return -ENXIO;
537
538 if (!acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd))
539 return -EIO;
540
541 return 0;
542 }
543
544 /*************************************************************************
545 * ACPI device model
546 */
547
548 #define TPACPI_ACPIHANDLE_INIT(object) \
549 drv_acpi_handle_init(#object, &object##_handle, *object##_parent, \
550 object##_paths, ARRAY_SIZE(object##_paths), &object##_path)
551
552 static void drv_acpi_handle_init(char *name,
553 acpi_handle *handle, acpi_handle parent,
554 char **paths, int num_paths, char **path)
555 {
556 int i;
557 acpi_status status;
558
559 vdbg_printk(TPACPI_DBG_INIT, "trying to locate ACPI handle for %s\n",
560 name);
561
562 for (i = 0; i < num_paths; i++) {
563 status = acpi_get_handle(parent, paths[i], handle);
564 if (ACPI_SUCCESS(status)) {
565 *path = paths[i];
566 dbg_printk(TPACPI_DBG_INIT,
567 "Found ACPI handle %s for %s\n",
568 *path, name);
569 return;
570 }
571 }
572
573 vdbg_printk(TPACPI_DBG_INIT, "ACPI handle for %s not found\n",
574 name);
575 *handle = NULL;
576 }
577
578 static void dispatch_acpi_notify(acpi_handle handle, u32 event, void *data)
579 {
580 struct ibm_struct *ibm = data;
581
582 if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
583 return;
584
585 if (!ibm || !ibm->acpi || !ibm->acpi->notify)
586 return;
587
588 ibm->acpi->notify(ibm, event);
589 }
590
591 static int __init setup_acpi_notify(struct ibm_struct *ibm)
592 {
593 acpi_status status;
594 int rc;
595
596 BUG_ON(!ibm->acpi);
597
598 if (!*ibm->acpi->handle)
599 return 0;
600
601 vdbg_printk(TPACPI_DBG_INIT,
602 "setting up ACPI notify for %s\n", ibm->name);
603
604 rc = acpi_bus_get_device(*ibm->acpi->handle, &ibm->acpi->device);
605 if (rc < 0) {
606 printk(TPACPI_ERR "acpi_bus_get_device(%s) failed: %d\n",
607 ibm->name, rc);
608 return -ENODEV;
609 }
610
611 ibm->acpi->device->driver_data = ibm;
612 sprintf(acpi_device_class(ibm->acpi->device), "%s/%s",
613 TPACPI_ACPI_EVENT_PREFIX,
614 ibm->name);
615
616 status = acpi_install_notify_handler(*ibm->acpi->handle,
617 ibm->acpi->type, dispatch_acpi_notify, ibm);
618 if (ACPI_FAILURE(status)) {
619 if (status == AE_ALREADY_EXISTS) {
620 printk(TPACPI_NOTICE
621 "another device driver is already "
622 "handling %s events\n", ibm->name);
623 } else {
624 printk(TPACPI_ERR
625 "acpi_install_notify_handler(%s) failed: %d\n",
626 ibm->name, status);
627 }
628 return -ENODEV;
629 }
630 ibm->flags.acpi_notify_installed = 1;
631 return 0;
632 }
633
634 static int __init tpacpi_device_add(struct acpi_device *device)
635 {
636 return 0;
637 }
638
639 static int __init register_tpacpi_subdriver(struct ibm_struct *ibm)
640 {
641 int rc;
642
643 dbg_printk(TPACPI_DBG_INIT,
644 "registering %s as an ACPI driver\n", ibm->name);
645
646 BUG_ON(!ibm->acpi);
647
648 ibm->acpi->driver = kzalloc(sizeof(struct acpi_driver), GFP_KERNEL);
649 if (!ibm->acpi->driver) {
650 printk(TPACPI_ERR
651 "failed to allocate memory for ibm->acpi->driver\n");
652 return -ENOMEM;
653 }
654
655 sprintf(ibm->acpi->driver->name, "%s_%s", TPACPI_NAME, ibm->name);
656 ibm->acpi->driver->ids = ibm->acpi->hid;
657
658 ibm->acpi->driver->ops.add = &tpacpi_device_add;
659
660 rc = acpi_bus_register_driver(ibm->acpi->driver);
661 if (rc < 0) {
662 printk(TPACPI_ERR "acpi_bus_register_driver(%s) failed: %d\n",
663 ibm->name, rc);
664 kfree(ibm->acpi->driver);
665 ibm->acpi->driver = NULL;
666 } else if (!rc)
667 ibm->flags.acpi_driver_registered = 1;
668
669 return rc;
670 }
671
672
673 /****************************************************************************
674 ****************************************************************************
675 *
676 * Procfs Helpers
677 *
678 ****************************************************************************
679 ****************************************************************************/
680
681 static int dispatch_procfs_read(char *page, char **start, off_t off,
682 int count, int *eof, void *data)
683 {
684 struct ibm_struct *ibm = data;
685 int len;
686
687 if (!ibm || !ibm->read)
688 return -EINVAL;
689
690 len = ibm->read(page);
691 if (len < 0)
692 return len;
693
694 if (len <= off + count)
695 *eof = 1;
696 *start = page + off;
697 len -= off;
698 if (len > count)
699 len = count;
700 if (len < 0)
701 len = 0;
702
703 return len;
704 }
705
706 static int dispatch_procfs_write(struct file *file,
707 const char __user *userbuf,
708 unsigned long count, void *data)
709 {
710 struct ibm_struct *ibm = data;
711 char *kernbuf;
712 int ret;
713
714 if (!ibm || !ibm->write)
715 return -EINVAL;
716
717 kernbuf = kmalloc(count + 2, GFP_KERNEL);
718 if (!kernbuf)
719 return -ENOMEM;
720
721 if (copy_from_user(kernbuf, userbuf, count)) {
722 kfree(kernbuf);
723 return -EFAULT;
724 }
725
726 kernbuf[count] = 0;
727 strcat(kernbuf, ",");
728 ret = ibm->write(kernbuf);
729 if (ret == 0)
730 ret = count;
731
732 kfree(kernbuf);
733
734 return ret;
735 }
736
737 static char *next_cmd(char **cmds)
738 {
739 char *start = *cmds;
740 char *end;
741
742 while ((end = strchr(start, ',')) && end == start)
743 start = end + 1;
744
745 if (!end)
746 return NULL;
747
748 *end = 0;
749 *cmds = end + 1;
750 return start;
751 }
752
753
754 /****************************************************************************
755 ****************************************************************************
756 *
757 * Device model: input, hwmon and platform
758 *
759 ****************************************************************************
760 ****************************************************************************/
761
762 static struct platform_device *tpacpi_pdev;
763 static struct platform_device *tpacpi_sensors_pdev;
764 static struct device *tpacpi_hwmon;
765 static struct input_dev *tpacpi_inputdev;
766 static struct mutex tpacpi_inputdev_send_mutex;
767 static LIST_HEAD(tpacpi_all_drivers);
768
769 static int tpacpi_suspend_handler(struct platform_device *pdev,
770 pm_message_t state)
771 {
772 struct ibm_struct *ibm, *itmp;
773
774 list_for_each_entry_safe(ibm, itmp,
775 &tpacpi_all_drivers,
776 all_drivers) {
777 if (ibm->suspend)
778 (ibm->suspend)(state);
779 }
780
781 return 0;
782 }
783
784 static int tpacpi_resume_handler(struct platform_device *pdev)
785 {
786 struct ibm_struct *ibm, *itmp;
787
788 list_for_each_entry_safe(ibm, itmp,
789 &tpacpi_all_drivers,
790 all_drivers) {
791 if (ibm->resume)
792 (ibm->resume)();
793 }
794
795 return 0;
796 }
797
798 static void tpacpi_shutdown_handler(struct platform_device *pdev)
799 {
800 struct ibm_struct *ibm, *itmp;
801
802 list_for_each_entry_safe(ibm, itmp,
803 &tpacpi_all_drivers,
804 all_drivers) {
805 if (ibm->shutdown)
806 (ibm->shutdown)();
807 }
808 }
809
810 static struct platform_driver tpacpi_pdriver = {
811 .driver = {
812 .name = TPACPI_DRVR_NAME,
813 .owner = THIS_MODULE,
814 },
815 .suspend = tpacpi_suspend_handler,
816 .resume = tpacpi_resume_handler,
817 .shutdown = tpacpi_shutdown_handler,
818 };
819
820 static struct platform_driver tpacpi_hwmon_pdriver = {
821 .driver = {
822 .name = TPACPI_HWMON_DRVR_NAME,
823 .owner = THIS_MODULE,
824 },
825 };
826
827 /*************************************************************************
828 * sysfs support helpers
829 */
830
831 struct attribute_set {
832 unsigned int members, max_members;
833 struct attribute_group group;
834 };
835
836 struct attribute_set_obj {
837 struct attribute_set s;
838 struct attribute *a;
839 } __attribute__((packed));
840
841 static struct attribute_set *create_attr_set(unsigned int max_members,
842 const char *name)
843 {
844 struct attribute_set_obj *sobj;
845
846 if (max_members == 0)
847 return NULL;
848
849 /* Allocates space for implicit NULL at the end too */
850 sobj = kzalloc(sizeof(struct attribute_set_obj) +
851 max_members * sizeof(struct attribute *),
852 GFP_KERNEL);
853 if (!sobj)
854 return NULL;
855 sobj->s.max_members = max_members;
856 sobj->s.group.attrs = &sobj->a;
857 sobj->s.group.name = name;
858
859 return &sobj->s;
860 }
861
862 #define destroy_attr_set(_set) \
863 kfree(_set);
864
865 /* not multi-threaded safe, use it in a single thread per set */
866 static int add_to_attr_set(struct attribute_set *s, struct attribute *attr)
867 {
868 if (!s || !attr)
869 return -EINVAL;
870
871 if (s->members >= s->max_members)
872 return -ENOMEM;
873
874 s->group.attrs[s->members] = attr;
875 s->members++;
876
877 return 0;
878 }
879
880 static int add_many_to_attr_set(struct attribute_set *s,
881 struct attribute **attr,
882 unsigned int count)
883 {
884 int i, res;
885
886 for (i = 0; i < count; i++) {
887 res = add_to_attr_set(s, attr[i]);
888 if (res)
889 return res;
890 }
891
892 return 0;
893 }
894
895 static void delete_attr_set(struct attribute_set *s, struct kobject *kobj)
896 {
897 sysfs_remove_group(kobj, &s->group);
898 destroy_attr_set(s);
899 }
900
901 #define register_attr_set_with_sysfs(_attr_set, _kobj) \
902 sysfs_create_group(_kobj, &_attr_set->group)
903
904 static int parse_strtoul(const char *buf,
905 unsigned long max, unsigned long *value)
906 {
907 char *endp;
908
909 while (*buf && isspace(*buf))
910 buf++;
911 *value = simple_strtoul(buf, &endp, 0);
912 while (*endp && isspace(*endp))
913 endp++;
914 if (*endp || *value > max)
915 return -EINVAL;
916
917 return 0;
918 }
919
920 static void tpacpi_disable_brightness_delay(void)
921 {
922 if (acpi_evalf(hkey_handle, NULL, "PWMS", "qvd", 0))
923 printk(TPACPI_NOTICE
924 "ACPI backlight control delay disabled\n");
925 }
926
927 static int __init tpacpi_query_bcl_levels(acpi_handle handle)
928 {
929 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
930 union acpi_object *obj;
931 int rc;
932
933 if (ACPI_SUCCESS(acpi_evaluate_object(handle, NULL, NULL, &buffer))) {
934 obj = (union acpi_object *)buffer.pointer;
935 if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) {
936 printk(TPACPI_ERR "Unknown _BCL data, "
937 "please report this to %s\n", TPACPI_MAIL);
938 rc = 0;
939 } else {
940 rc = obj->package.count;
941 }
942 } else {
943 return 0;
944 }
945
946 kfree(buffer.pointer);
947 return rc;
948 }
949
950 static acpi_status __init tpacpi_acpi_walk_find_bcl(acpi_handle handle,
951 u32 lvl, void *context, void **rv)
952 {
953 char name[ACPI_PATH_SEGMENT_LENGTH];
954 struct acpi_buffer buffer = { sizeof(name), &name };
955
956 if (ACPI_SUCCESS(acpi_get_name(handle, ACPI_SINGLE_NAME, &buffer)) &&
957 !strncmp("_BCL", name, sizeof(name) - 1)) {
958 BUG_ON(!rv || !*rv);
959 **(int **)rv = tpacpi_query_bcl_levels(handle);
960 return AE_CTRL_TERMINATE;
961 } else {
962 return AE_OK;
963 }
964 }
965
966 /*
967 * Returns 0 (no ACPI _BCL or _BCL invalid), or size of brightness map
968 */
969 static int __init tpacpi_check_std_acpi_brightness_support(void)
970 {
971 int status;
972 int bcl_levels = 0;
973 void *bcl_ptr = &bcl_levels;
974
975 if (!vid_handle) {
976 TPACPI_ACPIHANDLE_INIT(vid);
977 }
978 if (!vid_handle)
979 return 0;
980
981 /*
982 * Search for a _BCL method, and execute it. This is safe on all
983 * ThinkPads, and as a side-effect, _BCL will place a Lenovo Vista
984 * BIOS in ACPI backlight control mode. We do NOT have to care
985 * about calling the _BCL method in an enabled video device, any
986 * will do for our purposes.
987 */
988
989 status = acpi_walk_namespace(ACPI_TYPE_METHOD, vid_handle, 3,
990 tpacpi_acpi_walk_find_bcl, NULL,
991 &bcl_ptr);
992
993 if (ACPI_SUCCESS(status) && bcl_levels > 2) {
994 tp_features.bright_acpimode = 1;
995 return (bcl_levels - 2);
996 }
997
998 return 0;
999 }
1000
1001 static int __init tpacpi_new_rfkill(const unsigned int id,
1002 struct rfkill **rfk,
1003 const enum rfkill_type rfktype,
1004 const char *name,
1005 const bool set_default,
1006 int (*toggle_radio)(void *, enum rfkill_state),
1007 int (*get_state)(void *, enum rfkill_state *))
1008 {
1009 int res;
1010 enum rfkill_state initial_state = RFKILL_STATE_SOFT_BLOCKED;
1011
1012 res = get_state(NULL, &initial_state);
1013 if (res < 0) {
1014 printk(TPACPI_ERR
1015 "failed to read initial state for %s, error %d; "
1016 "will turn radio off\n", name, res);
1017 } else if (set_default) {
1018 /* try to set the initial state as the default for the rfkill
1019 * type, since we ask the firmware to preserve it across S5 in
1020 * NVRAM */
1021 if (rfkill_set_default(rfktype,
1022 (initial_state == RFKILL_STATE_UNBLOCKED) ?
1023 RFKILL_STATE_UNBLOCKED :
1024 RFKILL_STATE_SOFT_BLOCKED) == -EPERM)
1025 vdbg_printk(TPACPI_DBG_RFKILL,
1026 "Default state for %s cannot be changed\n",
1027 name);
1028 }
1029
1030 *rfk = rfkill_allocate(&tpacpi_pdev->dev, rfktype);
1031 if (!*rfk) {
1032 printk(TPACPI_ERR
1033 "failed to allocate memory for rfkill class\n");
1034 return -ENOMEM;
1035 }
1036
1037 (*rfk)->name = name;
1038 (*rfk)->get_state = get_state;
1039 (*rfk)->toggle_radio = toggle_radio;
1040 (*rfk)->state = initial_state;
1041
1042 res = rfkill_register(*rfk);
1043 if (res < 0) {
1044 printk(TPACPI_ERR
1045 "failed to register %s rfkill switch: %d\n",
1046 name, res);
1047 rfkill_free(*rfk);
1048 *rfk = NULL;
1049 return res;
1050 }
1051
1052 return 0;
1053 }
1054
1055 static void printk_deprecated_attribute(const char * const what,
1056 const char * const details)
1057 {
1058 tpacpi_log_usertask("deprecated sysfs attribute");
1059 printk(TPACPI_WARN "WARNING: sysfs attribute %s is deprecated and "
1060 "will be removed. %s\n",
1061 what, details);
1062 }
1063
1064 static void printk_deprecated_rfkill_attribute(const char * const what)
1065 {
1066 printk_deprecated_attribute(what,
1067 "Please switch to generic rfkill before year 2010");
1068 }
1069
1070 /*************************************************************************
1071 * thinkpad-acpi driver attributes
1072 */
1073
1074 /* interface_version --------------------------------------------------- */
1075 static ssize_t tpacpi_driver_interface_version_show(
1076 struct device_driver *drv,
1077 char *buf)
1078 {
1079 return snprintf(buf, PAGE_SIZE, "0x%08x\n", TPACPI_SYSFS_VERSION);
1080 }
1081
1082 static DRIVER_ATTR(interface_version, S_IRUGO,
1083 tpacpi_driver_interface_version_show, NULL);
1084
1085 /* debug_level --------------------------------------------------------- */
1086 static ssize_t tpacpi_driver_debug_show(struct device_driver *drv,
1087 char *buf)
1088 {
1089 return snprintf(buf, PAGE_SIZE, "0x%04x\n", dbg_level);
1090 }
1091
1092 static ssize_t tpacpi_driver_debug_store(struct device_driver *drv,
1093 const char *buf, size_t count)
1094 {
1095 unsigned long t;
1096
1097 if (parse_strtoul(buf, 0xffff, &t))
1098 return -EINVAL;
1099
1100 dbg_level = t;
1101
1102 return count;
1103 }
1104
1105 static DRIVER_ATTR(debug_level, S_IWUSR | S_IRUGO,
1106 tpacpi_driver_debug_show, tpacpi_driver_debug_store);
1107
1108 /* version ------------------------------------------------------------- */
1109 static ssize_t tpacpi_driver_version_show(struct device_driver *drv,
1110 char *buf)
1111 {
1112 return snprintf(buf, PAGE_SIZE, "%s v%s\n",
1113 TPACPI_DESC, TPACPI_VERSION);
1114 }
1115
1116 static DRIVER_ATTR(version, S_IRUGO,
1117 tpacpi_driver_version_show, NULL);
1118
1119 /* --------------------------------------------------------------------- */
1120
1121 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
1122
1123 static void tpacpi_send_radiosw_update(void);
1124
1125 /* wlsw_emulstate ------------------------------------------------------ */
1126 static ssize_t tpacpi_driver_wlsw_emulstate_show(struct device_driver *drv,
1127 char *buf)
1128 {
1129 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_wlsw_emulstate);
1130 }
1131
1132 static ssize_t tpacpi_driver_wlsw_emulstate_store(struct device_driver *drv,
1133 const char *buf, size_t count)
1134 {
1135 unsigned long t;
1136
1137 if (parse_strtoul(buf, 1, &t))
1138 return -EINVAL;
1139
1140 if (tpacpi_wlsw_emulstate != t) {
1141 tpacpi_wlsw_emulstate = !!t;
1142 tpacpi_send_radiosw_update();
1143 } else
1144 tpacpi_wlsw_emulstate = !!t;
1145
1146 return count;
1147 }
1148
1149 static DRIVER_ATTR(wlsw_emulstate, S_IWUSR | S_IRUGO,
1150 tpacpi_driver_wlsw_emulstate_show,
1151 tpacpi_driver_wlsw_emulstate_store);
1152
1153 /* bluetooth_emulstate ------------------------------------------------- */
1154 static ssize_t tpacpi_driver_bluetooth_emulstate_show(
1155 struct device_driver *drv,
1156 char *buf)
1157 {
1158 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_bluetooth_emulstate);
1159 }
1160
1161 static ssize_t tpacpi_driver_bluetooth_emulstate_store(
1162 struct device_driver *drv,
1163 const char *buf, size_t count)
1164 {
1165 unsigned long t;
1166
1167 if (parse_strtoul(buf, 1, &t))
1168 return -EINVAL;
1169
1170 tpacpi_bluetooth_emulstate = !!t;
1171
1172 return count;
1173 }
1174
1175 static DRIVER_ATTR(bluetooth_emulstate, S_IWUSR | S_IRUGO,
1176 tpacpi_driver_bluetooth_emulstate_show,
1177 tpacpi_driver_bluetooth_emulstate_store);
1178
1179 /* wwan_emulstate ------------------------------------------------- */
1180 static ssize_t tpacpi_driver_wwan_emulstate_show(
1181 struct device_driver *drv,
1182 char *buf)
1183 {
1184 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_wwan_emulstate);
1185 }
1186
1187 static ssize_t tpacpi_driver_wwan_emulstate_store(
1188 struct device_driver *drv,
1189 const char *buf, size_t count)
1190 {
1191 unsigned long t;
1192
1193 if (parse_strtoul(buf, 1, &t))
1194 return -EINVAL;
1195
1196 tpacpi_wwan_emulstate = !!t;
1197
1198 return count;
1199 }
1200
1201 static DRIVER_ATTR(wwan_emulstate, S_IWUSR | S_IRUGO,
1202 tpacpi_driver_wwan_emulstate_show,
1203 tpacpi_driver_wwan_emulstate_store);
1204
1205 /* uwb_emulstate ------------------------------------------------- */
1206 static ssize_t tpacpi_driver_uwb_emulstate_show(
1207 struct device_driver *drv,
1208 char *buf)
1209 {
1210 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_uwb_emulstate);
1211 }
1212
1213 static ssize_t tpacpi_driver_uwb_emulstate_store(
1214 struct device_driver *drv,
1215 const char *buf, size_t count)
1216 {
1217 unsigned long t;
1218
1219 if (parse_strtoul(buf, 1, &t))
1220 return -EINVAL;
1221
1222 tpacpi_uwb_emulstate = !!t;
1223
1224 return count;
1225 }
1226
1227 static DRIVER_ATTR(uwb_emulstate, S_IWUSR | S_IRUGO,
1228 tpacpi_driver_uwb_emulstate_show,
1229 tpacpi_driver_uwb_emulstate_store);
1230 #endif
1231
1232 /* --------------------------------------------------------------------- */
1233
1234 static struct driver_attribute *tpacpi_driver_attributes[] = {
1235 &driver_attr_debug_level, &driver_attr_version,
1236 &driver_attr_interface_version,
1237 };
1238
1239 static int __init tpacpi_create_driver_attributes(struct device_driver *drv)
1240 {
1241 int i, res;
1242
1243 i = 0;
1244 res = 0;
1245 while (!res && i < ARRAY_SIZE(tpacpi_driver_attributes)) {
1246 res = driver_create_file(drv, tpacpi_driver_attributes[i]);
1247 i++;
1248 }
1249
1250 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
1251 if (!res && dbg_wlswemul)
1252 res = driver_create_file(drv, &driver_attr_wlsw_emulstate);
1253 if (!res && dbg_bluetoothemul)
1254 res = driver_create_file(drv, &driver_attr_bluetooth_emulstate);
1255 if (!res && dbg_wwanemul)
1256 res = driver_create_file(drv, &driver_attr_wwan_emulstate);
1257 if (!res && dbg_uwbemul)
1258 res = driver_create_file(drv, &driver_attr_uwb_emulstate);
1259 #endif
1260
1261 return res;
1262 }
1263
1264 static void tpacpi_remove_driver_attributes(struct device_driver *drv)
1265 {
1266 int i;
1267
1268 for (i = 0; i < ARRAY_SIZE(tpacpi_driver_attributes); i++)
1269 driver_remove_file(drv, tpacpi_driver_attributes[i]);
1270
1271 #ifdef THINKPAD_ACPI_DEBUGFACILITIES
1272 driver_remove_file(drv, &driver_attr_wlsw_emulstate);
1273 driver_remove_file(drv, &driver_attr_bluetooth_emulstate);
1274 driver_remove_file(drv, &driver_attr_wwan_emulstate);
1275 driver_remove_file(drv, &driver_attr_uwb_emulstate);
1276 #endif
1277 }
1278
1279 /****************************************************************************
1280 ****************************************************************************
1281 *
1282 * Subdrivers
1283 *
1284 ****************************************************************************
1285 ****************************************************************************/
1286
1287 /*************************************************************************
1288 * thinkpad-acpi init subdriver
1289 */
1290
1291 static int __init thinkpad_acpi_driver_init(struct ibm_init_struct *iibm)
1292 {
1293 printk(TPACPI_INFO "%s v%s\n", TPACPI_DESC, TPACPI_VERSION);
1294 printk(TPACPI_INFO "%s\n", TPACPI_URL);
1295
1296 printk(TPACPI_INFO "ThinkPad BIOS %s, EC %s\n",
1297 (thinkpad_id.bios_version_str) ?
1298 thinkpad_id.bios_version_str : "unknown",
1299 (thinkpad_id.ec_version_str) ?
1300 thinkpad_id.ec_version_str : "unknown");
1301
1302 if (thinkpad_id.vendor && thinkpad_id.model_str)
1303 printk(TPACPI_INFO "%s %s, model %s\n",
1304 (thinkpad_id.vendor == PCI_VENDOR_ID_IBM) ?
1305 "IBM" : ((thinkpad_id.vendor ==
1306 PCI_VENDOR_ID_LENOVO) ?
1307 "Lenovo" : "Unknown vendor"),
1308 thinkpad_id.model_str,
1309 (thinkpad_id.nummodel_str) ?
1310 thinkpad_id.nummodel_str : "unknown");
1311
1312 return 0;
1313 }
1314
1315 static int thinkpad_acpi_driver_read(char *p)
1316 {
1317 int len = 0;
1318
1319 len += sprintf(p + len, "driver:\t\t%s\n", TPACPI_DESC);
1320 len += sprintf(p + len, "version:\t%s\n", TPACPI_VERSION);
1321
1322 return len;
1323 }
1324
1325 static struct ibm_struct thinkpad_acpi_driver_data = {
1326 .name = "driver",
1327 .read = thinkpad_acpi_driver_read,
1328 };
1329
1330 /*************************************************************************
1331 * Hotkey subdriver
1332 */
1333
1334 enum { /* hot key scan codes (derived from ACPI DSDT) */
1335 TP_ACPI_HOTKEYSCAN_FNF1 = 0,
1336 TP_ACPI_HOTKEYSCAN_FNF2,
1337 TP_ACPI_HOTKEYSCAN_FNF3,
1338 TP_ACPI_HOTKEYSCAN_FNF4,
1339 TP_ACPI_HOTKEYSCAN_FNF5,
1340 TP_ACPI_HOTKEYSCAN_FNF6,
1341 TP_ACPI_HOTKEYSCAN_FNF7,
1342 TP_ACPI_HOTKEYSCAN_FNF8,
1343 TP_ACPI_HOTKEYSCAN_FNF9,
1344 TP_ACPI_HOTKEYSCAN_FNF10,
1345 TP_ACPI_HOTKEYSCAN_FNF11,
1346 TP_ACPI_HOTKEYSCAN_FNF12,
1347 TP_ACPI_HOTKEYSCAN_FNBACKSPACE,
1348 TP_ACPI_HOTKEYSCAN_FNINSERT,
1349 TP_ACPI_HOTKEYSCAN_FNDELETE,
1350 TP_ACPI_HOTKEYSCAN_FNHOME,
1351 TP_ACPI_HOTKEYSCAN_FNEND,
1352 TP_ACPI_HOTKEYSCAN_FNPAGEUP,
1353 TP_ACPI_HOTKEYSCAN_FNPAGEDOWN,
1354 TP_ACPI_HOTKEYSCAN_FNSPACE,
1355 TP_ACPI_HOTKEYSCAN_VOLUMEUP,
1356 TP_ACPI_HOTKEYSCAN_VOLUMEDOWN,
1357 TP_ACPI_HOTKEYSCAN_MUTE,
1358 TP_ACPI_HOTKEYSCAN_THINKPAD,
1359 };
1360
1361 enum { /* Keys available through NVRAM polling */
1362 TPACPI_HKEY_NVRAM_KNOWN_MASK = 0x00fb88c0U,
1363 TPACPI_HKEY_NVRAM_GOOD_MASK = 0x00fb8000U,
1364 };
1365
1366 enum { /* Positions of some of the keys in hotkey masks */
1367 TP_ACPI_HKEY_DISPSWTCH_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF7,
1368 TP_ACPI_HKEY_DISPXPAND_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF8,
1369 TP_ACPI_HKEY_HIBERNATE_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF12,
1370 TP_ACPI_HKEY_BRGHTUP_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNHOME,
1371 TP_ACPI_HKEY_BRGHTDWN_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNEND,
1372 TP_ACPI_HKEY_THNKLGHT_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNPAGEUP,
1373 TP_ACPI_HKEY_ZOOM_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNSPACE,
1374 TP_ACPI_HKEY_VOLUP_MASK = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEUP,
1375 TP_ACPI_HKEY_VOLDWN_MASK = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEDOWN,
1376 TP_ACPI_HKEY_MUTE_MASK = 1 << TP_ACPI_HOTKEYSCAN_MUTE,
1377 TP_ACPI_HKEY_THINKPAD_MASK = 1 << TP_ACPI_HOTKEYSCAN_THINKPAD,
1378 };
1379
1380 enum { /* NVRAM to ACPI HKEY group map */
1381 TP_NVRAM_HKEY_GROUP_HK2 = TP_ACPI_HKEY_THINKPAD_MASK |
1382 TP_ACPI_HKEY_ZOOM_MASK |
1383 TP_ACPI_HKEY_DISPSWTCH_MASK |
1384 TP_ACPI_HKEY_HIBERNATE_MASK,
1385 TP_NVRAM_HKEY_GROUP_BRIGHTNESS = TP_ACPI_HKEY_BRGHTUP_MASK |
1386 TP_ACPI_HKEY_BRGHTDWN_MASK,
1387 TP_NVRAM_HKEY_GROUP_VOLUME = TP_ACPI_HKEY_VOLUP_MASK |
1388 TP_ACPI_HKEY_VOLDWN_MASK |
1389 TP_ACPI_HKEY_MUTE_MASK,
1390 };
1391
1392 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1393 struct tp_nvram_state {
1394 u16 thinkpad_toggle:1;
1395 u16 zoom_toggle:1;
1396 u16 display_toggle:1;
1397 u16 thinklight_toggle:1;
1398 u16 hibernate_toggle:1;
1399 u16 displayexp_toggle:1;
1400 u16 display_state:1;
1401 u16 brightness_toggle:1;
1402 u16 volume_toggle:1;
1403 u16 mute:1;
1404
1405 u8 brightness_level;
1406 u8 volume_level;
1407 };
1408
1409 static struct task_struct *tpacpi_hotkey_task;
1410 static u32 hotkey_source_mask; /* bit mask 0=ACPI,1=NVRAM */
1411 static int hotkey_poll_freq = 10; /* Hz */
1412 static struct mutex hotkey_thread_mutex;
1413 static struct mutex hotkey_thread_data_mutex;
1414 static unsigned int hotkey_config_change;
1415
1416 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1417
1418 #define hotkey_source_mask 0U
1419
1420 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1421
1422 static struct mutex hotkey_mutex;
1423
1424 static enum { /* Reasons for waking up */
1425 TP_ACPI_WAKEUP_NONE = 0, /* None or unknown */
1426 TP_ACPI_WAKEUP_BAYEJ, /* Bay ejection request */
1427 TP_ACPI_WAKEUP_UNDOCK, /* Undock request */
1428 } hotkey_wakeup_reason;
1429
1430 static int hotkey_autosleep_ack;
1431
1432 static u32 hotkey_orig_mask;
1433 static u32 hotkey_all_mask;
1434 static u32 hotkey_reserved_mask;
1435 static u32 hotkey_mask;
1436
1437 static unsigned int hotkey_report_mode;
1438
1439 static u16 *hotkey_keycode_map;
1440
1441 static struct attribute_set *hotkey_dev_attributes;
1442
1443 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1444 #define HOTKEY_CONFIG_CRITICAL_START \
1445 do { \
1446 mutex_lock(&hotkey_thread_data_mutex); \
1447 hotkey_config_change++; \
1448 } while (0);
1449 #define HOTKEY_CONFIG_CRITICAL_END \
1450 mutex_unlock(&hotkey_thread_data_mutex);
1451 #else
1452 #define HOTKEY_CONFIG_CRITICAL_START
1453 #define HOTKEY_CONFIG_CRITICAL_END
1454 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1455
1456 /* HKEY.MHKG() return bits */
1457 #define TP_HOTKEY_TABLET_MASK (1 << 3)
1458
1459 static int hotkey_get_wlsw(int *status)
1460 {
1461 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
1462 if (dbg_wlswemul) {
1463 *status = !!tpacpi_wlsw_emulstate;
1464 return 0;
1465 }
1466 #endif
1467 if (!acpi_evalf(hkey_handle, status, "WLSW", "d"))
1468 return -EIO;
1469 return 0;
1470 }
1471
1472 static int hotkey_get_tablet_mode(int *status)
1473 {
1474 int s;
1475
1476 if (!acpi_evalf(hkey_handle, &s, "MHKG", "d"))
1477 return -EIO;
1478
1479 *status = ((s & TP_HOTKEY_TABLET_MASK) != 0);
1480 return 0;
1481 }
1482
1483 /*
1484 * Call with hotkey_mutex held
1485 */
1486 static int hotkey_mask_get(void)
1487 {
1488 u32 m = 0;
1489
1490 if (tp_features.hotkey_mask) {
1491 if (!acpi_evalf(hkey_handle, &m, "DHKN", "d"))
1492 return -EIO;
1493 }
1494 hotkey_mask = m | (hotkey_source_mask & hotkey_mask);
1495
1496 return 0;
1497 }
1498
1499 /*
1500 * Call with hotkey_mutex held
1501 */
1502 static int hotkey_mask_set(u32 mask)
1503 {
1504 int i;
1505 int rc = 0;
1506
1507 if (tp_features.hotkey_mask) {
1508 if (!tp_warned.hotkey_mask_ff &&
1509 (mask == 0xffff || mask == 0xffffff ||
1510 mask == 0xffffffff)) {
1511 tp_warned.hotkey_mask_ff = 1;
1512 printk(TPACPI_NOTICE
1513 "setting the hotkey mask to 0x%08x is likely "
1514 "not the best way to go about it\n", mask);
1515 printk(TPACPI_NOTICE
1516 "please consider using the driver defaults, "
1517 "and refer to up-to-date thinkpad-acpi "
1518 "documentation\n");
1519 }
1520
1521 HOTKEY_CONFIG_CRITICAL_START
1522 for (i = 0; i < 32; i++) {
1523 u32 m = 1 << i;
1524 /* enable in firmware mask only keys not in NVRAM
1525 * mode, but enable the key in the cached hotkey_mask
1526 * regardless of mode, or the key will end up
1527 * disabled by hotkey_mask_get() */
1528 if (!acpi_evalf(hkey_handle,
1529 NULL, "MHKM", "vdd", i + 1,
1530 !!((mask & ~hotkey_source_mask) & m))) {
1531 rc = -EIO;
1532 break;
1533 } else {
1534 hotkey_mask = (hotkey_mask & ~m) | (mask & m);
1535 }
1536 }
1537 HOTKEY_CONFIG_CRITICAL_END
1538
1539 /* hotkey_mask_get must be called unconditionally below */
1540 if (!hotkey_mask_get() && !rc &&
1541 (hotkey_mask & ~hotkey_source_mask) !=
1542 (mask & ~hotkey_source_mask)) {
1543 printk(TPACPI_NOTICE
1544 "requested hot key mask 0x%08x, but "
1545 "firmware forced it to 0x%08x\n",
1546 mask, hotkey_mask);
1547 }
1548 } else {
1549 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1550 HOTKEY_CONFIG_CRITICAL_START
1551 hotkey_mask = mask & hotkey_source_mask;
1552 HOTKEY_CONFIG_CRITICAL_END
1553 hotkey_mask_get();
1554 if (hotkey_mask != mask) {
1555 printk(TPACPI_NOTICE
1556 "requested hot key mask 0x%08x, "
1557 "forced to 0x%08x (NVRAM poll mask is "
1558 "0x%08x): no firmware mask support\n",
1559 mask, hotkey_mask, hotkey_source_mask);
1560 }
1561 #else
1562 hotkey_mask_get();
1563 rc = -ENXIO;
1564 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1565 }
1566
1567 return rc;
1568 }
1569
1570 static int hotkey_status_get(int *status)
1571 {
1572 if (!acpi_evalf(hkey_handle, status, "DHKC", "d"))
1573 return -EIO;
1574
1575 return 0;
1576 }
1577
1578 static int hotkey_status_set(bool enable)
1579 {
1580 if (!acpi_evalf(hkey_handle, NULL, "MHKC", "vd", enable ? 1 : 0))
1581 return -EIO;
1582
1583 return 0;
1584 }
1585
1586 static void tpacpi_input_send_tabletsw(void)
1587 {
1588 int state;
1589
1590 if (tp_features.hotkey_tablet &&
1591 !hotkey_get_tablet_mode(&state)) {
1592 mutex_lock(&tpacpi_inputdev_send_mutex);
1593
1594 input_report_switch(tpacpi_inputdev,
1595 SW_TABLET_MODE, !!state);
1596 input_sync(tpacpi_inputdev);
1597
1598 mutex_unlock(&tpacpi_inputdev_send_mutex);
1599 }
1600 }
1601
1602 static void tpacpi_input_send_key(unsigned int scancode)
1603 {
1604 unsigned int keycode;
1605
1606 keycode = hotkey_keycode_map[scancode];
1607
1608 if (keycode != KEY_RESERVED) {
1609 mutex_lock(&tpacpi_inputdev_send_mutex);
1610
1611 input_report_key(tpacpi_inputdev, keycode, 1);
1612 if (keycode == KEY_UNKNOWN)
1613 input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN,
1614 scancode);
1615 input_sync(tpacpi_inputdev);
1616
1617 input_report_key(tpacpi_inputdev, keycode, 0);
1618 if (keycode == KEY_UNKNOWN)
1619 input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN,
1620 scancode);
1621 input_sync(tpacpi_inputdev);
1622
1623 mutex_unlock(&tpacpi_inputdev_send_mutex);
1624 }
1625 }
1626
1627 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1628 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver;
1629
1630 static void tpacpi_hotkey_send_key(unsigned int scancode)
1631 {
1632 tpacpi_input_send_key(scancode);
1633 if (hotkey_report_mode < 2) {
1634 acpi_bus_generate_proc_event(ibm_hotkey_acpidriver.device,
1635 0x80, 0x1001 + scancode);
1636 }
1637 }
1638
1639 static void hotkey_read_nvram(struct tp_nvram_state *n, u32 m)
1640 {
1641 u8 d;
1642
1643 if (m & TP_NVRAM_HKEY_GROUP_HK2) {
1644 d = nvram_read_byte(TP_NVRAM_ADDR_HK2);
1645 n->thinkpad_toggle = !!(d & TP_NVRAM_MASK_HKT_THINKPAD);
1646 n->zoom_toggle = !!(d & TP_NVRAM_MASK_HKT_ZOOM);
1647 n->display_toggle = !!(d & TP_NVRAM_MASK_HKT_DISPLAY);
1648 n->hibernate_toggle = !!(d & TP_NVRAM_MASK_HKT_HIBERNATE);
1649 }
1650 if (m & TP_ACPI_HKEY_THNKLGHT_MASK) {
1651 d = nvram_read_byte(TP_NVRAM_ADDR_THINKLIGHT);
1652 n->thinklight_toggle = !!(d & TP_NVRAM_MASK_THINKLIGHT);
1653 }
1654 if (m & TP_ACPI_HKEY_DISPXPAND_MASK) {
1655 d = nvram_read_byte(TP_NVRAM_ADDR_VIDEO);
1656 n->displayexp_toggle =
1657 !!(d & TP_NVRAM_MASK_HKT_DISPEXPND);
1658 }
1659 if (m & TP_NVRAM_HKEY_GROUP_BRIGHTNESS) {
1660 d = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS);
1661 n->brightness_level = (d & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
1662 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
1663 n->brightness_toggle =
1664 !!(d & TP_NVRAM_MASK_HKT_BRIGHTNESS);
1665 }
1666 if (m & TP_NVRAM_HKEY_GROUP_VOLUME) {
1667 d = nvram_read_byte(TP_NVRAM_ADDR_MIXER);
1668 n->volume_level = (d & TP_NVRAM_MASK_LEVEL_VOLUME)
1669 >> TP_NVRAM_POS_LEVEL_VOLUME;
1670 n->mute = !!(d & TP_NVRAM_MASK_MUTE);
1671 n->volume_toggle = !!(d & TP_NVRAM_MASK_HKT_VOLUME);
1672 }
1673 }
1674
1675 #define TPACPI_COMPARE_KEY(__scancode, __member) \
1676 do { \
1677 if ((mask & (1 << __scancode)) && \
1678 oldn->__member != newn->__member) \
1679 tpacpi_hotkey_send_key(__scancode); \
1680 } while (0)
1681
1682 #define TPACPI_MAY_SEND_KEY(__scancode) \
1683 do { if (mask & (1 << __scancode)) \
1684 tpacpi_hotkey_send_key(__scancode); } while (0)
1685
1686 static void hotkey_compare_and_issue_event(struct tp_nvram_state *oldn,
1687 struct tp_nvram_state *newn,
1688 u32 mask)
1689 {
1690 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_THINKPAD, thinkpad_toggle);
1691 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNSPACE, zoom_toggle);
1692 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF7, display_toggle);
1693 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF12, hibernate_toggle);
1694
1695 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNPAGEUP, thinklight_toggle);
1696
1697 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF8, displayexp_toggle);
1698
1699 /* handle volume */
1700 if (oldn->volume_toggle != newn->volume_toggle) {
1701 if (oldn->mute != newn->mute) {
1702 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE);
1703 }
1704 if (oldn->volume_level > newn->volume_level) {
1705 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
1706 } else if (oldn->volume_level < newn->volume_level) {
1707 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
1708 } else if (oldn->mute == newn->mute) {
1709 /* repeated key presses that didn't change state */
1710 if (newn->mute) {
1711 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE);
1712 } else if (newn->volume_level != 0) {
1713 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
1714 } else {
1715 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
1716 }
1717 }
1718 }
1719
1720 /* handle brightness */
1721 if (oldn->brightness_toggle != newn->brightness_toggle) {
1722 if (oldn->brightness_level < newn->brightness_level) {
1723 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
1724 } else if (oldn->brightness_level > newn->brightness_level) {
1725 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
1726 } else {
1727 /* repeated key presses that didn't change state */
1728 if (newn->brightness_level != 0) {
1729 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
1730 } else {
1731 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
1732 }
1733 }
1734 }
1735 }
1736
1737 #undef TPACPI_COMPARE_KEY
1738 #undef TPACPI_MAY_SEND_KEY
1739
1740 static int hotkey_kthread(void *data)
1741 {
1742 struct tp_nvram_state s[2];
1743 u32 mask;
1744 unsigned int si, so;
1745 unsigned long t;
1746 unsigned int change_detector, must_reset;
1747
1748 mutex_lock(&hotkey_thread_mutex);
1749
1750 if (tpacpi_lifecycle == TPACPI_LIFE_EXITING)
1751 goto exit;
1752
1753 set_freezable();
1754
1755 so = 0;
1756 si = 1;
1757 t = 0;
1758
1759 /* Initial state for compares */
1760 mutex_lock(&hotkey_thread_data_mutex);
1761 change_detector = hotkey_config_change;
1762 mask = hotkey_source_mask & hotkey_mask;
1763 mutex_unlock(&hotkey_thread_data_mutex);
1764 hotkey_read_nvram(&s[so], mask);
1765
1766 while (!kthread_should_stop() && hotkey_poll_freq) {
1767 if (t == 0)
1768 t = 1000/hotkey_poll_freq;
1769 t = msleep_interruptible(t);
1770 if (unlikely(kthread_should_stop()))
1771 break;
1772 must_reset = try_to_freeze();
1773 if (t > 0 && !must_reset)
1774 continue;
1775
1776 mutex_lock(&hotkey_thread_data_mutex);
1777 if (must_reset || hotkey_config_change != change_detector) {
1778 /* forget old state on thaw or config change */
1779 si = so;
1780 t = 0;
1781 change_detector = hotkey_config_change;
1782 }
1783 mask = hotkey_source_mask & hotkey_mask;
1784 mutex_unlock(&hotkey_thread_data_mutex);
1785
1786 if (likely(mask)) {
1787 hotkey_read_nvram(&s[si], mask);
1788 if (likely(si != so)) {
1789 hotkey_compare_and_issue_event(&s[so], &s[si],
1790 mask);
1791 }
1792 }
1793
1794 so = si;
1795 si ^= 1;
1796 }
1797
1798 exit:
1799 mutex_unlock(&hotkey_thread_mutex);
1800 return 0;
1801 }
1802
1803 static void hotkey_poll_stop_sync(void)
1804 {
1805 if (tpacpi_hotkey_task) {
1806 if (frozen(tpacpi_hotkey_task) ||
1807 freezing(tpacpi_hotkey_task))
1808 thaw_process(tpacpi_hotkey_task);
1809
1810 kthread_stop(tpacpi_hotkey_task);
1811 tpacpi_hotkey_task = NULL;
1812 mutex_lock(&hotkey_thread_mutex);
1813 /* at this point, the thread did exit */
1814 mutex_unlock(&hotkey_thread_mutex);
1815 }
1816 }
1817
1818 /* call with hotkey_mutex held */
1819 static void hotkey_poll_setup(int may_warn)
1820 {
1821 if ((hotkey_source_mask & hotkey_mask) != 0 &&
1822 hotkey_poll_freq > 0 &&
1823 (tpacpi_inputdev->users > 0 || hotkey_report_mode < 2)) {
1824 if (!tpacpi_hotkey_task) {
1825 tpacpi_hotkey_task = kthread_run(hotkey_kthread,
1826 NULL, TPACPI_NVRAM_KTHREAD_NAME);
1827 if (IS_ERR(tpacpi_hotkey_task)) {
1828 tpacpi_hotkey_task = NULL;
1829 printk(TPACPI_ERR
1830 "could not create kernel thread "
1831 "for hotkey polling\n");
1832 }
1833 }
1834 } else {
1835 hotkey_poll_stop_sync();
1836 if (may_warn &&
1837 hotkey_source_mask != 0 && hotkey_poll_freq == 0) {
1838 printk(TPACPI_NOTICE
1839 "hot keys 0x%08x require polling, "
1840 "which is currently disabled\n",
1841 hotkey_source_mask);
1842 }
1843 }
1844 }
1845
1846 static void hotkey_poll_setup_safe(int may_warn)
1847 {
1848 mutex_lock(&hotkey_mutex);
1849 hotkey_poll_setup(may_warn);
1850 mutex_unlock(&hotkey_mutex);
1851 }
1852
1853 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1854
1855 static void hotkey_poll_setup_safe(int __unused)
1856 {
1857 }
1858
1859 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1860
1861 static int hotkey_inputdev_open(struct input_dev *dev)
1862 {
1863 switch (tpacpi_lifecycle) {
1864 case TPACPI_LIFE_INIT:
1865 /*
1866 * hotkey_init will call hotkey_poll_setup_safe
1867 * at the appropriate moment
1868 */
1869 return 0;
1870 case TPACPI_LIFE_EXITING:
1871 return -EBUSY;
1872 case TPACPI_LIFE_RUNNING:
1873 hotkey_poll_setup_safe(0);
1874 return 0;
1875 }
1876
1877 /* Should only happen if tpacpi_lifecycle is corrupt */
1878 BUG();
1879 return -EBUSY;
1880 }
1881
1882 static void hotkey_inputdev_close(struct input_dev *dev)
1883 {
1884 /* disable hotkey polling when possible */
1885 if (tpacpi_lifecycle == TPACPI_LIFE_RUNNING)
1886 hotkey_poll_setup_safe(0);
1887 }
1888
1889 /* sysfs hotkey enable ------------------------------------------------- */
1890 static ssize_t hotkey_enable_show(struct device *dev,
1891 struct device_attribute *attr,
1892 char *buf)
1893 {
1894 int res, status;
1895
1896 printk_deprecated_attribute("hotkey_enable",
1897 "Hotkey reporting is always enabled");
1898
1899 res = hotkey_status_get(&status);
1900 if (res)
1901 return res;
1902
1903 return snprintf(buf, PAGE_SIZE, "%d\n", status);
1904 }
1905
1906 static ssize_t hotkey_enable_store(struct device *dev,
1907 struct device_attribute *attr,
1908 const char *buf, size_t count)
1909 {
1910 unsigned long t;
1911
1912 printk_deprecated_attribute("hotkey_enable",
1913 "Hotkeys can be disabled through hotkey_mask");
1914
1915 if (parse_strtoul(buf, 1, &t))
1916 return -EINVAL;
1917
1918 if (t == 0)
1919 return -EPERM;
1920
1921 return count;
1922 }
1923
1924 static struct device_attribute dev_attr_hotkey_enable =
1925 __ATTR(hotkey_enable, S_IWUSR | S_IRUGO,
1926 hotkey_enable_show, hotkey_enable_store);
1927
1928 /* sysfs hotkey mask --------------------------------------------------- */
1929 static ssize_t hotkey_mask_show(struct device *dev,
1930 struct device_attribute *attr,
1931 char *buf)
1932 {
1933 int res;
1934
1935 if (mutex_lock_killable(&hotkey_mutex))
1936 return -ERESTARTSYS;
1937 res = hotkey_mask_get();
1938 mutex_unlock(&hotkey_mutex);
1939
1940 return (res)?
1941 res : snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_mask);
1942 }
1943
1944 static ssize_t hotkey_mask_store(struct device *dev,
1945 struct device_attribute *attr,
1946 const char *buf, size_t count)
1947 {
1948 unsigned long t;
1949 int res;
1950
1951 if (parse_strtoul(buf, 0xffffffffUL, &t))
1952 return -EINVAL;
1953
1954 if (mutex_lock_killable(&hotkey_mutex))
1955 return -ERESTARTSYS;
1956
1957 res = hotkey_mask_set(t);
1958
1959 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1960 hotkey_poll_setup(1);
1961 #endif
1962
1963 mutex_unlock(&hotkey_mutex);
1964
1965 tpacpi_disclose_usertask("hotkey_mask", "set to 0x%08lx\n", t);
1966
1967 return (res) ? res : count;
1968 }
1969
1970 static struct device_attribute dev_attr_hotkey_mask =
1971 __ATTR(hotkey_mask, S_IWUSR | S_IRUGO,
1972 hotkey_mask_show, hotkey_mask_store);
1973
1974 /* sysfs hotkey bios_enabled ------------------------------------------- */
1975 static ssize_t hotkey_bios_enabled_show(struct device *dev,
1976 struct device_attribute *attr,
1977 char *buf)
1978 {
1979 return sprintf(buf, "0\n");
1980 }
1981
1982 static struct device_attribute dev_attr_hotkey_bios_enabled =
1983 __ATTR(hotkey_bios_enabled, S_IRUGO, hotkey_bios_enabled_show, NULL);
1984
1985 /* sysfs hotkey bios_mask ---------------------------------------------- */
1986 static ssize_t hotkey_bios_mask_show(struct device *dev,
1987 struct device_attribute *attr,
1988 char *buf)
1989 {
1990 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_orig_mask);
1991 }
1992
1993 static struct device_attribute dev_attr_hotkey_bios_mask =
1994 __ATTR(hotkey_bios_mask, S_IRUGO, hotkey_bios_mask_show, NULL);
1995
1996 /* sysfs hotkey all_mask ----------------------------------------------- */
1997 static ssize_t hotkey_all_mask_show(struct device *dev,
1998 struct device_attribute *attr,
1999 char *buf)
2000 {
2001 return snprintf(buf, PAGE_SIZE, "0x%08x\n",
2002 hotkey_all_mask | hotkey_source_mask);
2003 }
2004
2005 static struct device_attribute dev_attr_hotkey_all_mask =
2006 __ATTR(hotkey_all_mask, S_IRUGO, hotkey_all_mask_show, NULL);
2007
2008 /* sysfs hotkey recommended_mask --------------------------------------- */
2009 static ssize_t hotkey_recommended_mask_show(struct device *dev,
2010 struct device_attribute *attr,
2011 char *buf)
2012 {
2013 return snprintf(buf, PAGE_SIZE, "0x%08x\n",
2014 (hotkey_all_mask | hotkey_source_mask)
2015 & ~hotkey_reserved_mask);
2016 }
2017
2018 static struct device_attribute dev_attr_hotkey_recommended_mask =
2019 __ATTR(hotkey_recommended_mask, S_IRUGO,
2020 hotkey_recommended_mask_show, NULL);
2021
2022 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2023
2024 /* sysfs hotkey hotkey_source_mask ------------------------------------- */
2025 static ssize_t hotkey_source_mask_show(struct device *dev,
2026 struct device_attribute *attr,
2027 char *buf)
2028 {
2029 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_source_mask);
2030 }
2031
2032 static ssize_t hotkey_source_mask_store(struct device *dev,
2033 struct device_attribute *attr,
2034 const char *buf, size_t count)
2035 {
2036 unsigned long t;
2037
2038 if (parse_strtoul(buf, 0xffffffffUL, &t) ||
2039 ((t & ~TPACPI_HKEY_NVRAM_KNOWN_MASK) != 0))
2040 return -EINVAL;
2041
2042 if (mutex_lock_killable(&hotkey_mutex))
2043 return -ERESTARTSYS;
2044
2045 HOTKEY_CONFIG_CRITICAL_START
2046 hotkey_source_mask = t;
2047 HOTKEY_CONFIG_CRITICAL_END
2048
2049 hotkey_poll_setup(1);
2050
2051 mutex_unlock(&hotkey_mutex);
2052
2053 tpacpi_disclose_usertask("hotkey_source_mask", "set to 0x%08lx\n", t);
2054
2055 return count;
2056 }
2057
2058 static struct device_attribute dev_attr_hotkey_source_mask =
2059 __ATTR(hotkey_source_mask, S_IWUSR | S_IRUGO,
2060 hotkey_source_mask_show, hotkey_source_mask_store);
2061
2062 /* sysfs hotkey hotkey_poll_freq --------------------------------------- */
2063 static ssize_t hotkey_poll_freq_show(struct device *dev,
2064 struct device_attribute *attr,
2065 char *buf)
2066 {
2067 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_poll_freq);
2068 }
2069
2070 static ssize_t hotkey_poll_freq_store(struct device *dev,
2071 struct device_attribute *attr,
2072 const char *buf, size_t count)
2073 {
2074 unsigned long t;
2075
2076 if (parse_strtoul(buf, 25, &t))
2077 return -EINVAL;
2078
2079 if (mutex_lock_killable(&hotkey_mutex))
2080 return -ERESTARTSYS;
2081
2082 hotkey_poll_freq = t;
2083
2084 hotkey_poll_setup(1);
2085 mutex_unlock(&hotkey_mutex);
2086
2087 tpacpi_disclose_usertask("hotkey_poll_freq", "set to %lu\n", t);
2088
2089 return count;
2090 }
2091
2092 static struct device_attribute dev_attr_hotkey_poll_freq =
2093 __ATTR(hotkey_poll_freq, S_IWUSR | S_IRUGO,
2094 hotkey_poll_freq_show, hotkey_poll_freq_store);
2095
2096 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2097
2098 /* sysfs hotkey radio_sw (pollable) ------------------------------------ */
2099 static ssize_t hotkey_radio_sw_show(struct device *dev,
2100 struct device_attribute *attr,
2101 char *buf)
2102 {
2103 int res, s;
2104 res = hotkey_get_wlsw(&s);
2105 if (res < 0)
2106 return res;
2107
2108 return snprintf(buf, PAGE_SIZE, "%d\n", !!s);
2109 }
2110
2111 static struct device_attribute dev_attr_hotkey_radio_sw =
2112 __ATTR(hotkey_radio_sw, S_IRUGO, hotkey_radio_sw_show, NULL);
2113
2114 static void hotkey_radio_sw_notify_change(void)
2115 {
2116 if (tp_features.hotkey_wlsw)
2117 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2118 "hotkey_radio_sw");
2119 }
2120
2121 /* sysfs hotkey tablet mode (pollable) --------------------------------- */
2122 static ssize_t hotkey_tablet_mode_show(struct device *dev,
2123 struct device_attribute *attr,
2124 char *buf)
2125 {
2126 int res, s;
2127 res = hotkey_get_tablet_mode(&s);
2128 if (res < 0)
2129 return res;
2130
2131 return snprintf(buf, PAGE_SIZE, "%d\n", !!s);
2132 }
2133
2134 static struct device_attribute dev_attr_hotkey_tablet_mode =
2135 __ATTR(hotkey_tablet_mode, S_IRUGO, hotkey_tablet_mode_show, NULL);
2136
2137 static void hotkey_tablet_mode_notify_change(void)
2138 {
2139 if (tp_features.hotkey_tablet)
2140 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2141 "hotkey_tablet_mode");
2142 }
2143
2144 /* sysfs hotkey report_mode -------------------------------------------- */
2145 static ssize_t hotkey_report_mode_show(struct device *dev,
2146 struct device_attribute *attr,
2147 char *buf)
2148 {
2149 return snprintf(buf, PAGE_SIZE, "%d\n",
2150 (hotkey_report_mode != 0) ? hotkey_report_mode : 1);
2151 }
2152
2153 static struct device_attribute dev_attr_hotkey_report_mode =
2154 __ATTR(hotkey_report_mode, S_IRUGO, hotkey_report_mode_show, NULL);
2155
2156 /* sysfs wakeup reason (pollable) -------------------------------------- */
2157 static ssize_t hotkey_wakeup_reason_show(struct device *dev,
2158 struct device_attribute *attr,
2159 char *buf)
2160 {
2161 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_wakeup_reason);
2162 }
2163
2164 static struct device_attribute dev_attr_hotkey_wakeup_reason =
2165 __ATTR(wakeup_reason, S_IRUGO, hotkey_wakeup_reason_show, NULL);
2166
2167 static void hotkey_wakeup_reason_notify_change(void)
2168 {
2169 if (tp_features.hotkey_mask)
2170 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2171 "wakeup_reason");
2172 }
2173
2174 /* sysfs wakeup hotunplug_complete (pollable) -------------------------- */
2175 static ssize_t hotkey_wakeup_hotunplug_complete_show(struct device *dev,
2176 struct device_attribute *attr,
2177 char *buf)
2178 {
2179 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_autosleep_ack);
2180 }
2181
2182 static struct device_attribute dev_attr_hotkey_wakeup_hotunplug_complete =
2183 __ATTR(wakeup_hotunplug_complete, S_IRUGO,
2184 hotkey_wakeup_hotunplug_complete_show, NULL);
2185
2186 static void hotkey_wakeup_hotunplug_complete_notify_change(void)
2187 {
2188 if (tp_features.hotkey_mask)
2189 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2190 "wakeup_hotunplug_complete");
2191 }
2192
2193 /* --------------------------------------------------------------------- */
2194
2195 static struct attribute *hotkey_attributes[] __initdata = {
2196 &dev_attr_hotkey_enable.attr,
2197 &dev_attr_hotkey_bios_enabled.attr,
2198 &dev_attr_hotkey_report_mode.attr,
2199 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2200 &dev_attr_hotkey_mask.attr,
2201 &dev_attr_hotkey_all_mask.attr,
2202 &dev_attr_hotkey_recommended_mask.attr,
2203 &dev_attr_hotkey_source_mask.attr,
2204 &dev_attr_hotkey_poll_freq.attr,
2205 #endif
2206 };
2207
2208 static struct attribute *hotkey_mask_attributes[] __initdata = {
2209 &dev_attr_hotkey_bios_mask.attr,
2210 #ifndef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2211 &dev_attr_hotkey_mask.attr,
2212 &dev_attr_hotkey_all_mask.attr,
2213 &dev_attr_hotkey_recommended_mask.attr,
2214 #endif
2215 &dev_attr_hotkey_wakeup_reason.attr,
2216 &dev_attr_hotkey_wakeup_hotunplug_complete.attr,
2217 };
2218
2219 static void bluetooth_update_rfk(void);
2220 static void wan_update_rfk(void);
2221 static void uwb_update_rfk(void);
2222 static void tpacpi_send_radiosw_update(void)
2223 {
2224 int wlsw;
2225
2226 /* Sync these BEFORE sending any rfkill events */
2227 if (tp_features.bluetooth)
2228 bluetooth_update_rfk();
2229 if (tp_features.wan)
2230 wan_update_rfk();
2231 if (tp_features.uwb)
2232 uwb_update_rfk();
2233
2234 if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&wlsw)) {
2235 mutex_lock(&tpacpi_inputdev_send_mutex);
2236
2237 input_report_switch(tpacpi_inputdev,
2238 SW_RFKILL_ALL, !!wlsw);
2239 input_sync(tpacpi_inputdev);
2240
2241 mutex_unlock(&tpacpi_inputdev_send_mutex);
2242 }
2243 hotkey_radio_sw_notify_change();
2244 }
2245
2246 static void hotkey_exit(void)
2247 {
2248 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2249 hotkey_poll_stop_sync();
2250 #endif
2251
2252 if (hotkey_dev_attributes)
2253 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
2254
2255 kfree(hotkey_keycode_map);
2256
2257 if (tp_features.hotkey) {
2258 dbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_HKEY,
2259 "restoring original hot key mask\n");
2260 /* no short-circuit boolean operator below! */
2261 if ((hotkey_mask_set(hotkey_orig_mask) |
2262 hotkey_status_set(false)) != 0)
2263 printk(TPACPI_ERR
2264 "failed to restore hot key mask "
2265 "to BIOS defaults\n");
2266 }
2267 }
2268
2269 static int __init hotkey_init(struct ibm_init_struct *iibm)
2270 {
2271 /* Requirements for changing the default keymaps:
2272 *
2273 * 1. Many of the keys are mapped to KEY_RESERVED for very
2274 * good reasons. Do not change them unless you have deep
2275 * knowledge on the IBM and Lenovo ThinkPad firmware for
2276 * the various ThinkPad models. The driver behaves
2277 * differently for KEY_RESERVED: such keys have their
2278 * hot key mask *unset* in mask_recommended, and also
2279 * in the initial hot key mask programmed into the
2280 * firmware at driver load time, which means the firm-
2281 * ware may react very differently if you change them to
2282 * something else;
2283 *
2284 * 2. You must be subscribed to the linux-thinkpad and
2285 * ibm-acpi-devel mailing lists, and you should read the
2286 * list archives since 2007 if you want to change the
2287 * keymaps. This requirement exists so that you will
2288 * know the past history of problems with the thinkpad-
2289 * acpi driver keymaps, and also that you will be
2290 * listening to any bug reports;
2291 *
2292 * 3. Do not send thinkpad-acpi specific patches directly to
2293 * for merging, *ever*. Send them to the linux-acpi
2294 * mailinglist for comments. Merging is to be done only
2295 * through acpi-test and the ACPI maintainer.
2296 *
2297 * If the above is too much to ask, don't change the keymap.
2298 * Ask the thinkpad-acpi maintainer to do it, instead.
2299 */
2300 static u16 ibm_keycode_map[] __initdata = {
2301 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
2302 KEY_FN_F1, KEY_FN_F2, KEY_COFFEE, KEY_SLEEP,
2303 KEY_WLAN, KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
2304 KEY_FN_F9, KEY_FN_F10, KEY_FN_F11, KEY_SUSPEND,
2305
2306 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
2307 KEY_UNKNOWN, /* 0x0C: FN+BACKSPACE */
2308 KEY_UNKNOWN, /* 0x0D: FN+INSERT */
2309 KEY_UNKNOWN, /* 0x0E: FN+DELETE */
2310
2311 /* brightness: firmware always reacts to them, unless
2312 * X.org did some tricks in the radeon BIOS scratch
2313 * registers of *some* models */
2314 KEY_RESERVED, /* 0x0F: FN+HOME (brightness up) */
2315 KEY_RESERVED, /* 0x10: FN+END (brightness down) */
2316
2317 /* Thinklight: firmware always react to it */
2318 KEY_RESERVED, /* 0x11: FN+PGUP (thinklight toggle) */
2319
2320 KEY_UNKNOWN, /* 0x12: FN+PGDOWN */
2321 KEY_ZOOM, /* 0x13: FN+SPACE (zoom) */
2322
2323 /* Volume: firmware always react to it and reprograms
2324 * the built-in *extra* mixer. Never map it to control
2325 * another mixer by default. */
2326 KEY_RESERVED, /* 0x14: VOLUME UP */
2327 KEY_RESERVED, /* 0x15: VOLUME DOWN */
2328 KEY_RESERVED, /* 0x16: MUTE */
2329
2330 KEY_VENDOR, /* 0x17: Thinkpad/AccessIBM/Lenovo */
2331
2332 /* (assignments unknown, please report if found) */
2333 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
2334 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
2335 };
2336 static u16 lenovo_keycode_map[] __initdata = {
2337 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
2338 KEY_FN_F1, KEY_COFFEE, KEY_BATTERY, KEY_SLEEP,
2339 KEY_WLAN, KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
2340 KEY_FN_F9, KEY_FN_F10, KEY_FN_F11, KEY_SUSPEND,
2341
2342 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
2343 KEY_UNKNOWN, /* 0x0C: FN+BACKSPACE */
2344 KEY_UNKNOWN, /* 0x0D: FN+INSERT */
2345 KEY_UNKNOWN, /* 0x0E: FN+DELETE */
2346
2347 /* These either have to go through ACPI video, or
2348 * act like in the IBM ThinkPads, so don't ever
2349 * enable them by default */
2350 KEY_RESERVED, /* 0x0F: FN+HOME (brightness up) */
2351 KEY_RESERVED, /* 0x10: FN+END (brightness down) */
2352
2353 KEY_RESERVED, /* 0x11: FN+PGUP (thinklight toggle) */
2354
2355 KEY_UNKNOWN, /* 0x12: FN+PGDOWN */
2356 KEY_ZOOM, /* 0x13: FN+SPACE (zoom) */
2357
2358 /* Volume: z60/z61, T60 (BIOS version?): firmware always
2359 * react to it and reprograms the built-in *extra* mixer.
2360 * Never map it to control another mixer by default.
2361 *
2362 * T60?, T61, R60?, R61: firmware and EC tries to send
2363 * these over the regular keyboard, so these are no-ops,
2364 * but there are still weird bugs re. MUTE, so do not
2365 * change unless you get test reports from all Lenovo
2366 * models. May cause the BIOS to interfere with the
2367 * HDA mixer.
2368 */
2369 KEY_RESERVED, /* 0x14: VOLUME UP */
2370 KEY_RESERVED, /* 0x15: VOLUME DOWN */
2371 KEY_RESERVED, /* 0x16: MUTE */
2372
2373 KEY_VENDOR, /* 0x17: Thinkpad/AccessIBM/Lenovo */
2374
2375 /* (assignments unknown, please report if found) */
2376 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
2377 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
2378 };
2379
2380 #define TPACPI_HOTKEY_MAP_LEN ARRAY_SIZE(ibm_keycode_map)
2381 #define TPACPI_HOTKEY_MAP_SIZE sizeof(ibm_keycode_map)
2382 #define TPACPI_HOTKEY_MAP_TYPESIZE sizeof(ibm_keycode_map[0])
2383
2384 int res, i;
2385 int status;
2386 int hkeyv;
2387
2388 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
2389 "initializing hotkey subdriver\n");
2390
2391 BUG_ON(!tpacpi_inputdev);
2392 BUG_ON(tpacpi_inputdev->open != NULL ||
2393 tpacpi_inputdev->close != NULL);
2394
2395 TPACPI_ACPIHANDLE_INIT(hkey);
2396 mutex_init(&hotkey_mutex);
2397
2398 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2399 mutex_init(&hotkey_thread_mutex);
2400 mutex_init(&hotkey_thread_data_mutex);
2401 #endif
2402
2403 /* hotkey not supported on 570 */
2404 tp_features.hotkey = hkey_handle != NULL;
2405
2406 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
2407 "hotkeys are %s\n",
2408 str_supported(tp_features.hotkey));
2409
2410 if (!tp_features.hotkey)
2411 return 1;
2412
2413 tpacpi_disable_brightness_delay();
2414
2415 hotkey_dev_attributes = create_attr_set(13, NULL);
2416 if (!hotkey_dev_attributes)
2417 return -ENOMEM;
2418 res = add_many_to_attr_set(hotkey_dev_attributes,
2419 hotkey_attributes,
2420 ARRAY_SIZE(hotkey_attributes));
2421 if (res)
2422 goto err_exit;
2423
2424 /* mask not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
2425 A30, R30, R31, T20-22, X20-21, X22-24. Detected by checking
2426 for HKEY interface version 0x100 */
2427 if (acpi_evalf(hkey_handle, &hkeyv, "MHKV", "qd")) {
2428 if ((hkeyv >> 8) != 1) {
2429 printk(TPACPI_ERR "unknown version of the "
2430 "HKEY interface: 0x%x\n", hkeyv);
2431 printk(TPACPI_ERR "please report this to %s\n",
2432 TPACPI_MAIL);
2433 } else {
2434 /*
2435 * MHKV 0x100 in A31, R40, R40e,
2436 * T4x, X31, and later
2437 */
2438 tp_features.hotkey_mask = 1;
2439 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
2440 "firmware HKEY interface version: 0x%x\n",
2441 hkeyv);
2442 }
2443 }
2444
2445 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
2446 "hotkey masks are %s\n",
2447 str_supported(tp_features.hotkey_mask));
2448
2449 if (tp_features.hotkey_mask) {
2450 if (!acpi_evalf(hkey_handle, &hotkey_all_mask,
2451 "MHKA", "qd")) {
2452 printk(TPACPI_ERR
2453 "missing MHKA handler, "
2454 "please report this to %s\n",
2455 TPACPI_MAIL);
2456 /* FN+F12, FN+F4, FN+F3 */
2457 hotkey_all_mask = 0x080cU;
2458 }
2459 }
2460
2461 /* hotkey_source_mask *must* be zero for
2462 * the first hotkey_mask_get */
2463 if (tp_features.hotkey_mask) {
2464 res = hotkey_mask_get();
2465 if (res)
2466 goto err_exit;
2467
2468 hotkey_orig_mask = hotkey_mask;
2469 res = add_many_to_attr_set(
2470 hotkey_dev_attributes,
2471 hotkey_mask_attributes,
2472 ARRAY_SIZE(hotkey_mask_attributes));
2473 if (res)
2474 goto err_exit;
2475 }
2476
2477 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2478 if (tp_features.hotkey_mask) {
2479 hotkey_source_mask = TPACPI_HKEY_NVRAM_GOOD_MASK
2480 & ~hotkey_all_mask;
2481 } else {
2482 hotkey_source_mask = TPACPI_HKEY_NVRAM_GOOD_MASK;
2483 }
2484
2485 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
2486 "hotkey source mask 0x%08x, polling freq %d\n",
2487 hotkey_source_mask, hotkey_poll_freq);
2488 #endif
2489
2490 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
2491 if (dbg_wlswemul) {
2492 tp_features.hotkey_wlsw = 1;
2493 printk(TPACPI_INFO
2494 "radio switch emulation enabled\n");
2495 } else
2496 #endif
2497 /* Not all thinkpads have a hardware radio switch */
2498 if (acpi_evalf(hkey_handle, &status, "WLSW", "qd")) {
2499 tp_features.hotkey_wlsw = 1;
2500 printk(TPACPI_INFO
2501 "radio switch found; radios are %s\n",
2502 enabled(status, 0));
2503 }
2504 if (tp_features.hotkey_wlsw)
2505 res = add_to_attr_set(hotkey_dev_attributes,
2506 &dev_attr_hotkey_radio_sw.attr);
2507
2508 /* For X41t, X60t, X61t Tablets... */
2509 if (!res && acpi_evalf(hkey_handle, &status, "MHKG", "qd")) {
2510 tp_features.hotkey_tablet = 1;
2511 printk(TPACPI_INFO
2512 "possible tablet mode switch found; "
2513 "ThinkPad in %s mode\n",
2514 (status & TP_HOTKEY_TABLET_MASK)?
2515 "tablet" : "laptop");
2516 res = add_to_attr_set(hotkey_dev_attributes,
2517 &dev_attr_hotkey_tablet_mode.attr);
2518 }
2519
2520 if (!res)
2521 res = register_attr_set_with_sysfs(
2522 hotkey_dev_attributes,
2523 &tpacpi_pdev->dev.kobj);
2524 if (res)
2525 goto err_exit;
2526
2527 /* Set up key map */
2528
2529 hotkey_keycode_map = kmalloc(TPACPI_HOTKEY_MAP_SIZE,
2530 GFP_KERNEL);
2531 if (!hotkey_keycode_map) {
2532 printk(TPACPI_ERR
2533 "failed to allocate memory for key map\n");
2534 res = -ENOMEM;
2535 goto err_exit;
2536 }
2537
2538 if (thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO) {
2539 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
2540 "using Lenovo default hot key map\n");
2541 memcpy(hotkey_keycode_map, &lenovo_keycode_map,
2542 TPACPI_HOTKEY_MAP_SIZE);
2543 } else {
2544 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
2545 "using IBM default hot key map\n");
2546 memcpy(hotkey_keycode_map, &ibm_keycode_map,
2547 TPACPI_HOTKEY_MAP_SIZE);
2548 }
2549
2550 set_bit(EV_KEY, tpacpi_inputdev->evbit);
2551 set_bit(EV_MSC, tpacpi_inputdev->evbit);
2552 set_bit(MSC_SCAN, tpacpi_inputdev->mscbit);
2553 tpacpi_inputdev->keycodesize = TPACPI_HOTKEY_MAP_TYPESIZE;
2554 tpacpi_inputdev->keycodemax = TPACPI_HOTKEY_MAP_LEN;
2555 tpacpi_inputdev->keycode = hotkey_keycode_map;
2556 for (i = 0; i < TPACPI_HOTKEY_MAP_LEN; i++) {
2557 if (hotkey_keycode_map[i] != KEY_RESERVED) {
2558 set_bit(hotkey_keycode_map[i],
2559 tpacpi_inputdev->keybit);
2560 } else {
2561 if (i < sizeof(hotkey_reserved_mask)*8)
2562 hotkey_reserved_mask |= 1 << i;
2563 }
2564 }
2565
2566 if (tp_features.hotkey_wlsw) {
2567 set_bit(EV_SW, tpacpi_inputdev->evbit);
2568 set_bit(SW_RFKILL_ALL, tpacpi_inputdev->swbit);
2569 }
2570 if (tp_features.hotkey_tablet) {
2571 set_bit(EV_SW, tpacpi_inputdev->evbit);
2572 set_bit(SW_TABLET_MODE, tpacpi_inputdev->swbit);
2573 }
2574
2575 /* Do not issue duplicate brightness change events to
2576 * userspace */
2577 if (!tp_features.bright_acpimode)
2578 /* update bright_acpimode... */
2579 tpacpi_check_std_acpi_brightness_support();
2580
2581 if (tp_features.bright_acpimode) {
2582 printk(TPACPI_INFO
2583 "This ThinkPad has standard ACPI backlight "
2584 "brightness control, supported by the ACPI "
2585 "video driver\n");
2586 printk(TPACPI_NOTICE
2587 "Disabling thinkpad-acpi brightness events "
2588 "by default...\n");
2589
2590 /* The hotkey_reserved_mask change below is not
2591 * necessary while the keys are at KEY_RESERVED in the
2592 * default map, but better safe than sorry, leave it
2593 * here as a marker of what we have to do, especially
2594 * when we finally become able to set this at runtime
2595 * on response to X.org requests */
2596 hotkey_reserved_mask |=
2597 (1 << TP_ACPI_HOTKEYSCAN_FNHOME)
2598 | (1 << TP_ACPI_HOTKEYSCAN_FNEND);
2599 }
2600
2601 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
2602 "enabling firmware HKEY event interface...\n");
2603 res = hotkey_status_set(true);
2604 if (res) {
2605 hotkey_exit();
2606 return res;
2607 }
2608 res = hotkey_mask_set(((hotkey_all_mask | hotkey_source_mask)
2609 & ~hotkey_reserved_mask)
2610 | hotkey_orig_mask);
2611 if (res < 0 && res != -ENXIO) {
2612 hotkey_exit();
2613 return res;
2614 }
2615
2616 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
2617 "legacy ibm/hotkey event reporting over procfs %s\n",
2618 (hotkey_report_mode < 2) ?
2619 "enabled" : "disabled");
2620
2621 tpacpi_inputdev->open = &hotkey_inputdev_open;
2622 tpacpi_inputdev->close = &hotkey_inputdev_close;
2623
2624 hotkey_poll_setup_safe(1);
2625 tpacpi_send_radiosw_update();
2626 tpacpi_input_send_tabletsw();
2627
2628 return 0;
2629
2630 err_exit:
2631 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
2632 hotkey_dev_attributes = NULL;
2633
2634 return (res < 0)? res : 1;
2635 }
2636
2637 static bool hotkey_notify_hotkey(const u32 hkey,
2638 bool *send_acpi_ev,
2639 bool *ignore_acpi_ev)
2640 {
2641 /* 0x1000-0x1FFF: key presses */
2642 unsigned int scancode = hkey & 0xfff;
2643 *send_acpi_ev = true;
2644 *ignore_acpi_ev = false;
2645
2646 if (scancode > 0 && scancode < 0x21) {
2647 scancode--;
2648 if (!(hotkey_source_mask & (1 << scancode))) {
2649 tpacpi_input_send_key(scancode);
2650 *send_acpi_ev = false;
2651 } else {
2652 *ignore_acpi_ev = true;
2653 }
2654 return true;
2655 }
2656 return false;
2657 }
2658
2659 static bool hotkey_notify_wakeup(const u32 hkey,
2660 bool *send_acpi_ev,
2661 bool *ignore_acpi_ev)
2662 {
2663 /* 0x2000-0x2FFF: Wakeup reason */
2664 *send_acpi_ev = true;
2665 *ignore_acpi_ev = false;
2666
2667 switch (hkey) {
2668 case 0x2304: /* suspend, undock */
2669 case 0x2404: /* hibernation, undock */
2670 hotkey_wakeup_reason = TP_ACPI_WAKEUP_UNDOCK;
2671 *ignore_acpi_ev = true;
2672 break;
2673
2674 case 0x2305: /* suspend, bay eject */
2675 case 0x2405: /* hibernation, bay eject */
2676 hotkey_wakeup_reason = TP_ACPI_WAKEUP_BAYEJ;
2677 *ignore_acpi_ev = true;
2678 break;
2679
2680 case 0x2313: /* Battery on critical low level (S3) */
2681 case 0x2413: /* Battery on critical low level (S4) */
2682 printk(TPACPI_ALERT
2683 "EMERGENCY WAKEUP: battery almost empty\n");
2684 /* how to auto-heal: */
2685 /* 2313: woke up from S3, go to S4/S5 */
2686 /* 2413: woke up from S4, go to S5 */
2687 break;
2688
2689 default:
2690 return false;
2691 }
2692
2693 if (hotkey_wakeup_reason != TP_ACPI_WAKEUP_NONE) {
2694 printk(TPACPI_INFO
2695 "woke up due to a hot-unplug "
2696 "request...\n");
2697 hotkey_wakeup_reason_notify_change();
2698 }
2699 return true;
2700 }
2701
2702 static bool hotkey_notify_usrevent(const u32 hkey,
2703 bool *send_acpi_ev,
2704 bool *ignore_acpi_ev)
2705 {
2706 /* 0x5000-0x5FFF: human interface helpers */
2707 *send_acpi_ev = true;
2708 *ignore_acpi_ev = false;
2709
2710 switch (hkey) {
2711 case 0x5010: /* Lenovo new BIOS: brightness changed */
2712 case 0x500b: /* X61t: tablet pen inserted into bay */
2713 case 0x500c: /* X61t: tablet pen removed from bay */
2714 return true;
2715
2716 case 0x5009: /* X41t-X61t: swivel up (tablet mode) */
2717 case 0x500a: /* X41t-X61t: swivel down (normal mode) */
2718 tpacpi_input_send_tabletsw();
2719 hotkey_tablet_mode_notify_change();
2720 *send_acpi_ev = false;
2721 return true;
2722
2723 case 0x5001:
2724 case 0x5002:
2725 /* LID switch events. Do not propagate */
2726 *ignore_acpi_ev = true;
2727 return true;
2728
2729 default:
2730 return false;
2731 }
2732 }
2733
2734 static bool hotkey_notify_thermal(const u32 hkey,
2735 bool *send_acpi_ev,
2736 bool *ignore_acpi_ev)
2737 {
2738 /* 0x6000-0x6FFF: thermal alarms */
2739 *send_acpi_ev = true;
2740 *ignore_acpi_ev = false;
2741
2742 switch (hkey) {
2743 case 0x6011:
2744 printk(TPACPI_CRIT
2745 "THERMAL ALARM: battery is too hot!\n");
2746 /* recommended action: warn user through gui */
2747 return true;
2748 case 0x6012:
2749 printk(TPACPI_ALERT
2750 "THERMAL EMERGENCY: battery is extremely hot!\n");
2751 /* recommended action: immediate sleep/hibernate */
2752 return true;
2753 case 0x6021:
2754 printk(TPACPI_CRIT
2755 "THERMAL ALARM: "
2756 "a sensor reports something is too hot!\n");
2757 /* recommended action: warn user through gui, that */
2758 /* some internal component is too hot */
2759 return true;
2760 case 0x6022:
2761 printk(TPACPI_ALERT
2762 "THERMAL EMERGENCY: "
2763 "a sensor reports something is extremely hot!\n");
2764 /* recommended action: immediate sleep/hibernate */
2765 return true;
2766 case 0x6030:
2767 printk(TPACPI_INFO
2768 "EC reports that Thermal Table has changed\n");
2769 /* recommended action: do nothing, we don't have
2770 * Lenovo ATM information */
2771 return true;
2772 default:
2773 printk(TPACPI_ALERT
2774 "THERMAL ALERT: unknown thermal alarm received\n");
2775 return false;
2776 }
2777 }
2778
2779 static void hotkey_notify(struct ibm_struct *ibm, u32 event)
2780 {
2781 u32 hkey;
2782 bool send_acpi_ev;
2783 bool ignore_acpi_ev;
2784 bool known_ev;
2785
2786 if (event != 0x80) {
2787 printk(TPACPI_ERR
2788 "unknown HKEY notification event %d\n", event);
2789 /* forward it to userspace, maybe it knows how to handle it */
2790 acpi_bus_generate_netlink_event(
2791 ibm->acpi->device->pnp.device_class,
2792 dev_name(&ibm->acpi->device->dev),
2793 event, 0);
2794 return;
2795 }
2796
2797 while (1) {
2798 if (!acpi_evalf(hkey_handle, &hkey, "MHKP", "d")) {
2799 printk(TPACPI_ERR "failed to retrieve HKEY event\n");
2800 return;
2801 }
2802
2803 if (hkey == 0) {
2804 /* queue empty */
2805 return;
2806 }
2807
2808 send_acpi_ev = true;
2809 ignore_acpi_ev = false;
2810
2811 switch (hkey >> 12) {
2812 case 1:
2813 /* 0x1000-0x1FFF: key presses */
2814 known_ev = hotkey_notify_hotkey(hkey, &send_acpi_ev,
2815 &ignore_acpi_ev);
2816 break;
2817 case 2:
2818 /* 0x2000-0x2FFF: Wakeup reason */
2819 known_ev = hotkey_notify_wakeup(hkey, &send_acpi_ev,
2820 &ignore_acpi_ev);
2821 break;
2822 case 3:
2823 /* 0x3000-0x3FFF: bay-related wakeups */
2824 if (hkey == 0x3003) {
2825 hotkey_autosleep_ack = 1;
2826 printk(TPACPI_INFO
2827 "bay ejected\n");
2828 hotkey_wakeup_hotunplug_complete_notify_change();
2829 known_ev = true;
2830 } else {
2831 known_ev = false;
2832 }
2833 break;
2834 case 4:
2835 /* 0x4000-0x4FFF: dock-related wakeups */
2836 if (hkey == 0x4003) {
2837 hotkey_autosleep_ack = 1;
2838 printk(TPACPI_INFO
2839 "undocked\n");
2840 hotkey_wakeup_hotunplug_complete_notify_change();
2841 known_ev = true;
2842 } else {
2843 known_ev = false;
2844 }
2845 break;
2846 case 5:
2847 /* 0x5000-0x5FFF: human interface helpers */
2848 known_ev = hotkey_notify_usrevent(hkey, &send_acpi_ev,
2849 &ignore_acpi_ev);
2850 break;
2851 case 6:
2852 /* 0x6000-0x6FFF: thermal alarms */
2853 known_ev = hotkey_notify_thermal(hkey, &send_acpi_ev,
2854 &ignore_acpi_ev);
2855 break;
2856 case 7:
2857 /* 0x7000-0x7FFF: misc */
2858 if (tp_features.hotkey_wlsw && hkey == 0x7000) {
2859 tpacpi_send_radiosw_update();
2860 send_acpi_ev = 0;
2861 known_ev = true;
2862 break;
2863 }
2864 /* fallthrough to default */
2865 default:
2866 known_ev = false;
2867 }
2868 if (!known_ev) {
2869 printk(TPACPI_NOTICE
2870 "unhandled HKEY event 0x%04x\n", hkey);
2871 printk(TPACPI_NOTICE
2872 "please report the conditions when this "
2873 "event happened to %s\n", TPACPI_MAIL);
2874 }
2875
2876 /* Legacy events */
2877 if (!ignore_acpi_ev &&
2878 (send_acpi_ev || hotkey_report_mode < 2)) {
2879 acpi_bus_generate_proc_event(ibm->acpi->device,
2880 event, hkey);
2881 }
2882
2883 /* netlink events */
2884 if (!ignore_acpi_ev && send_acpi_ev) {
2885 acpi_bus_generate_netlink_event(
2886 ibm->acpi->device->pnp.device_class,
2887 dev_name(&ibm->acpi->device->dev),
2888 event, hkey);
2889 }
2890 }
2891 }
2892
2893 static void hotkey_suspend(pm_message_t state)
2894 {
2895 /* Do these on suspend, we get the events on early resume! */
2896 hotkey_wakeup_reason = TP_ACPI_WAKEUP_NONE;
2897 hotkey_autosleep_ack = 0;
2898 }
2899
2900 static void hotkey_resume(void)
2901 {
2902 tpacpi_disable_brightness_delay();
2903
2904 if (hotkey_mask_get())
2905 printk(TPACPI_ERR
2906 "error while trying to read hot key mask "
2907 "from firmware\n");
2908 tpacpi_send_radiosw_update();
2909 hotkey_tablet_mode_notify_change();
2910 hotkey_wakeup_reason_notify_change();
2911 hotkey_wakeup_hotunplug_complete_notify_change();
2912 hotkey_poll_setup_safe(0);
2913 }
2914
2915 /* procfs -------------------------------------------------------------- */
2916 static int hotkey_read(char *p)
2917 {
2918 int res, status;
2919 int len = 0;
2920
2921 if (!tp_features.hotkey) {
2922 len += sprintf(p + len, "status:\t\tnot supported\n");
2923 return len;
2924 }
2925
2926 if (mutex_lock_killable(&hotkey_mutex))
2927 return -ERESTARTSYS;
2928 res = hotkey_status_get(&status);
2929 if (!res)
2930 res = hotkey_mask_get();
2931 mutex_unlock(&hotkey_mutex);
2932 if (res)
2933 return res;
2934
2935 len += sprintf(p + len, "status:\t\t%s\n", enabled(status, 0));
2936 if (tp_features.hotkey_mask) {
2937 len += sprintf(p + len, "mask:\t\t0x%08x\n", hotkey_mask);
2938 len += sprintf(p + len,
2939 "commands:\tenable, disable, reset, <mask>\n");
2940 } else {
2941 len += sprintf(p + len, "mask:\t\tnot supported\n");
2942 len += sprintf(p + len, "commands:\tenable, disable, reset\n");
2943 }
2944
2945 return len;
2946 }
2947
2948 static void hotkey_enabledisable_warn(void)
2949 {
2950 tpacpi_log_usertask("procfs hotkey enable/disable");
2951 WARN(1, TPACPI_WARN
2952 "hotkey enable/disable functionality has been "
2953 "removed from the driver. Hotkeys are always enabled.\n");
2954 }
2955
2956 static int hotkey_write(char *buf)
2957 {
2958 int res;
2959 u32 mask;
2960 char *cmd;
2961
2962 if (!tp_features.hotkey)
2963 return -ENODEV;
2964
2965 if (mutex_lock_killable(&hotkey_mutex))
2966 return -ERESTARTSYS;
2967
2968 mask = hotkey_mask;
2969
2970 res = 0;
2971 while ((cmd = next_cmd(&buf))) {
2972 if (strlencmp(cmd, "enable") == 0) {
2973 hotkey_enabledisable_warn();
2974 } else if (strlencmp(cmd, "disable") == 0) {
2975 hotkey_enabledisable_warn();
2976 res = -EPERM;
2977 } else if (strlencmp(cmd, "reset") == 0) {
2978 mask = hotkey_orig_mask;
2979 } else if (sscanf(cmd, "0x%x", &mask) == 1) {
2980 /* mask set */
2981 } else if (sscanf(cmd, "%x", &mask) == 1) {
2982 /* mask set */
2983 } else {
2984 res = -EINVAL;
2985 goto errexit;
2986 }
2987 }
2988
2989 if (!res)
2990 tpacpi_disclose_usertask("procfs hotkey",
2991 "set mask to 0x%08x\n", mask);
2992
2993 if (!res && mask != hotkey_mask)
2994 res = hotkey_mask_set(mask);
2995
2996 errexit:
2997 mutex_unlock(&hotkey_mutex);
2998 return res;
2999 }
3000
3001 static const struct acpi_device_id ibm_htk_device_ids[] = {
3002 {TPACPI_ACPI_HKEY_HID, 0},
3003 {"", 0},
3004 };
3005
3006 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver = {
3007 .hid = ibm_htk_device_ids,
3008 .notify = hotkey_notify,
3009 .handle = &hkey_handle,
3010 .type = ACPI_DEVICE_NOTIFY,
3011 };
3012
3013 static struct ibm_struct hotkey_driver_data = {
3014 .name = "hotkey",
3015 .read = hotkey_read,
3016 .write = hotkey_write,
3017 .exit = hotkey_exit,
3018 .resume = hotkey_resume,
3019 .suspend = hotkey_suspend,
3020 .acpi = &ibm_hotkey_acpidriver,
3021 };
3022
3023 /*************************************************************************
3024 * Bluetooth subdriver
3025 */
3026
3027 enum {
3028 /* ACPI GBDC/SBDC bits */
3029 TP_ACPI_BLUETOOTH_HWPRESENT = 0x01, /* Bluetooth hw available */
3030 TP_ACPI_BLUETOOTH_RADIOSSW = 0x02, /* Bluetooth radio enabled */
3031 TP_ACPI_BLUETOOTH_RESUMECTRL = 0x04, /* Bluetooth state at resume:
3032 off / last state */
3033 };
3034
3035 enum {
3036 /* ACPI \BLTH commands */
3037 TP_ACPI_BLTH_GET_ULTRAPORT_ID = 0x00, /* Get Ultraport BT ID */
3038 TP_ACPI_BLTH_GET_PWR_ON_RESUME = 0x01, /* Get power-on-resume state */
3039 TP_ACPI_BLTH_PWR_ON_ON_RESUME = 0x02, /* Resume powered on */
3040 TP_ACPI_BLTH_PWR_OFF_ON_RESUME = 0x03, /* Resume powered off */
3041 TP_ACPI_BLTH_SAVE_STATE = 0x05, /* Save state for S4/S5 */
3042 };
3043
3044 #define TPACPI_RFK_BLUETOOTH_SW_NAME "tpacpi_bluetooth_sw"
3045
3046 static struct rfkill *tpacpi_bluetooth_rfkill;
3047
3048 static void bluetooth_suspend(pm_message_t state)
3049 {
3050 /* Try to make sure radio will resume powered off */
3051 if (!acpi_evalf(NULL, NULL, "\\BLTH", "vd",
3052 TP_ACPI_BLTH_PWR_OFF_ON_RESUME))
3053 vdbg_printk(TPACPI_DBG_RFKILL,
3054 "bluetooth power down on resume request failed\n");
3055 }
3056
3057 static int bluetooth_get_radiosw(void)
3058 {
3059 int status;
3060
3061 if (!tp_features.bluetooth)
3062 return -ENODEV;
3063
3064 /* WLSW overrides bluetooth in firmware/hardware, reflect that */
3065 if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&status) && !status)
3066 return RFKILL_STATE_HARD_BLOCKED;
3067
3068 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3069 if (dbg_bluetoothemul)
3070 return (tpacpi_bluetooth_emulstate) ?
3071 RFKILL_STATE_UNBLOCKED : RFKILL_STATE_SOFT_BLOCKED;
3072 #endif
3073
3074 if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
3075 return -EIO;
3076
3077 return ((status & TP_ACPI_BLUETOOTH_RADIOSSW) != 0) ?
3078 RFKILL_STATE_UNBLOCKED : RFKILL_STATE_SOFT_BLOCKED;
3079 }
3080
3081 static void bluetooth_update_rfk(void)
3082 {
3083 int status;
3084
3085 if (!tpacpi_bluetooth_rfkill)
3086 return;
3087
3088 status = bluetooth_get_radiosw();
3089 if (status < 0)
3090 return;
3091 rfkill_force_state(tpacpi_bluetooth_rfkill, status);
3092
3093 vdbg_printk(TPACPI_DBG_RFKILL,
3094 "forced rfkill state to %d\n",
3095 status);
3096 }
3097
3098 static int bluetooth_set_radiosw(int radio_on, int update_rfk)
3099 {
3100 int status;
3101
3102 if (!tp_features.bluetooth)
3103 return -ENODEV;
3104
3105 /* WLSW overrides bluetooth in firmware/hardware, but there is no
3106 * reason to risk weird behaviour. */
3107 if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&status) && !status
3108 && radio_on)
3109 return -EPERM;
3110
3111 vdbg_printk(TPACPI_DBG_RFKILL,
3112 "will %s bluetooth\n", radio_on ? "enable" : "disable");
3113
3114 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3115 if (dbg_bluetoothemul) {
3116 tpacpi_bluetooth_emulstate = !!radio_on;
3117 if (update_rfk)
3118 bluetooth_update_rfk();
3119 return 0;
3120 }
3121 #endif
3122
3123 /* We make sure to keep TP_ACPI_BLUETOOTH_RESUMECTRL off */
3124 if (radio_on)
3125 status = TP_ACPI_BLUETOOTH_RADIOSSW;
3126 else
3127 status = 0;
3128 if (!acpi_evalf(hkey_handle, NULL, "SBDC", "vd", status))
3129 return -EIO;
3130
3131 if (update_rfk)
3132 bluetooth_update_rfk();
3133
3134 return 0;
3135 }
3136
3137 /* sysfs bluetooth enable ---------------------------------------------- */
3138 static ssize_t bluetooth_enable_show(struct device *dev,
3139 struct device_attribute *attr,
3140 char *buf)
3141 {
3142 int status;
3143
3144 printk_deprecated_rfkill_attribute("bluetooth_enable");
3145
3146 status = bluetooth_get_radiosw();
3147 if (status < 0)
3148 return status;
3149
3150 return snprintf(buf, PAGE_SIZE, "%d\n",
3151 (status == RFKILL_STATE_UNBLOCKED) ? 1 : 0);
3152 }
3153
3154 static ssize_t bluetooth_enable_store(struct device *dev,
3155 struct device_attribute *attr,
3156 const char *buf, size_t count)
3157 {
3158 unsigned long t;
3159 int res;
3160
3161 printk_deprecated_rfkill_attribute("bluetooth_enable");
3162
3163 if (parse_strtoul(buf, 1, &t))
3164 return -EINVAL;
3165
3166 tpacpi_disclose_usertask("bluetooth_enable", "set to %ld\n", t);
3167
3168 res = bluetooth_set_radiosw(t, 1);
3169
3170 return (res) ? res : count;
3171 }
3172
3173 static struct device_attribute dev_attr_bluetooth_enable =
3174 __ATTR(bluetooth_enable, S_IWUSR | S_IRUGO,
3175 bluetooth_enable_show, bluetooth_enable_store);
3176
3177 /* --------------------------------------------------------------------- */
3178
3179 static struct attribute *bluetooth_attributes[] = {
3180 &dev_attr_bluetooth_enable.attr,
3181 NULL
3182 };
3183
3184 static const struct attribute_group bluetooth_attr_group = {
3185 .attrs = bluetooth_attributes,
3186 };
3187
3188 static int tpacpi_bluetooth_rfk_get(void *data, enum rfkill_state *state)
3189 {
3190 int bts = bluetooth_get_radiosw();
3191
3192 if (bts < 0)
3193 return bts;
3194
3195 *state = bts;
3196 return 0;
3197 }
3198
3199 static int tpacpi_bluetooth_rfk_set(void *data, enum rfkill_state state)
3200 {
3201 dbg_printk(TPACPI_DBG_RFKILL,
3202 "request to change radio state to %d\n", state);
3203 return bluetooth_set_radiosw((state == RFKILL_STATE_UNBLOCKED), 0);
3204 }
3205
3206 static void bluetooth_shutdown(void)
3207 {
3208 /* Order firmware to save current state to NVRAM */
3209 if (!acpi_evalf(NULL, NULL, "\\BLTH", "vd",
3210 TP_ACPI_BLTH_SAVE_STATE))
3211 printk(TPACPI_NOTICE
3212 "failed to save bluetooth state to NVRAM\n");
3213 else
3214 vdbg_printk(TPACPI_DBG_RFKILL,
3215 "bluestooth state saved to NVRAM\n");
3216 }
3217
3218 static void bluetooth_exit(void)
3219 {
3220 bluetooth_shutdown();
3221
3222 if (tpacpi_bluetooth_rfkill)
3223 rfkill_unregister(tpacpi_bluetooth_rfkill);
3224
3225 sysfs_remove_group(&tpacpi_pdev->dev.kobj,
3226 &bluetooth_attr_group);
3227 }
3228
3229 static int __init bluetooth_init(struct ibm_init_struct *iibm)
3230 {
3231 int res;
3232 int status = 0;
3233
3234 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
3235 "initializing bluetooth subdriver\n");
3236
3237 TPACPI_ACPIHANDLE_INIT(hkey);
3238
3239 /* bluetooth not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
3240 G4x, R30, R31, R40e, R50e, T20-22, X20-21 */
3241 tp_features.bluetooth = hkey_handle &&
3242 acpi_evalf(hkey_handle, &status, "GBDC", "qd");
3243
3244 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
3245 "bluetooth is %s, status 0x%02x\n",
3246 str_supported(tp_features.bluetooth),
3247 status);
3248
3249 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3250 if (dbg_bluetoothemul) {
3251 tp_features.bluetooth = 1;
3252 printk(TPACPI_INFO
3253 "bluetooth switch emulation enabled\n");
3254 } else
3255 #endif
3256 if (tp_features.bluetooth &&
3257 !(status & TP_ACPI_BLUETOOTH_HWPRESENT)) {
3258 /* no bluetooth hardware present in system */
3259 tp_features.bluetooth = 0;
3260 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
3261 "bluetooth hardware not installed\n");
3262 }
3263
3264 if (!tp_features.bluetooth)
3265 return 1;
3266
3267 res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
3268 &bluetooth_attr_group);
3269 if (res)
3270 return res;
3271
3272 res = tpacpi_new_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID,
3273 &tpacpi_bluetooth_rfkill,
3274 RFKILL_TYPE_BLUETOOTH,
3275 TPACPI_RFK_BLUETOOTH_SW_NAME,
3276 true,
3277 tpacpi_bluetooth_rfk_set,
3278 tpacpi_bluetooth_rfk_get);
3279 if (res) {
3280 bluetooth_exit();
3281 return res;
3282 }
3283
3284 return 0;
3285 }
3286
3287 /* procfs -------------------------------------------------------------- */
3288 static int bluetooth_read(char *p)
3289 {
3290 int len = 0;
3291 int status = bluetooth_get_radiosw();
3292
3293 if (!tp_features.bluetooth)
3294 len += sprintf(p + len, "status:\t\tnot supported\n");
3295 else {
3296 len += sprintf(p + len, "status:\t\t%s\n",
3297 (status == RFKILL_STATE_UNBLOCKED) ?
3298 "enabled" : "disabled");
3299 len += sprintf(p + len, "commands:\tenable, disable\n");
3300 }
3301
3302 return len;
3303 }
3304
3305 static int bluetooth_write(char *buf)
3306 {
3307 char *cmd;
3308 int state = -1;
3309
3310 if (!tp_features.bluetooth)
3311 return -ENODEV;
3312
3313 while ((cmd = next_cmd(&buf))) {
3314 if (strlencmp(cmd, "enable") == 0) {
3315 state = 1;
3316 } else if (strlencmp(cmd, "disable") == 0) {
3317 state = 0;
3318 } else
3319 return -EINVAL;
3320 }
3321
3322 if (state != -1) {
3323 tpacpi_disclose_usertask("procfs bluetooth",
3324 "attempt to %s\n",
3325 state ? "enable" : "disable");
3326 bluetooth_set_radiosw(state, 1);
3327 }
3328
3329 return 0;
3330 }
3331
3332 static struct ibm_struct bluetooth_driver_data = {
3333 .name = "bluetooth",
3334 .read = bluetooth_read,
3335 .write = bluetooth_write,
3336 .exit = bluetooth_exit,
3337 .suspend = bluetooth_suspend,
3338 .shutdown = bluetooth_shutdown,
3339 };
3340
3341 /*************************************************************************
3342 * Wan subdriver
3343 */
3344
3345 enum {
3346 /* ACPI GWAN/SWAN bits */
3347 TP_ACPI_WANCARD_HWPRESENT = 0x01, /* Wan hw available */
3348 TP_ACPI_WANCARD_RADIOSSW = 0x02, /* Wan radio enabled */
3349 TP_ACPI_WANCARD_RESUMECTRL = 0x04, /* Wan state at resume:
3350 off / last state */
3351 };
3352
3353 #define TPACPI_RFK_WWAN_SW_NAME "tpacpi_wwan_sw"
3354
3355 static struct rfkill *tpacpi_wan_rfkill;
3356
3357 static void wan_suspend(pm_message_t state)
3358 {
3359 /* Try to make sure radio will resume powered off */
3360 if (!acpi_evalf(NULL, NULL, "\\WGSV", "qvd",
3361 TP_ACPI_WGSV_PWR_OFF_ON_RESUME))
3362 vdbg_printk(TPACPI_DBG_RFKILL,
3363 "WWAN power down on resume request failed\n");
3364 }
3365
3366 static int wan_get_radiosw(void)
3367 {
3368 int status;
3369
3370 if (!tp_features.wan)
3371 return -ENODEV;
3372
3373 /* WLSW overrides WWAN in firmware/hardware, reflect that */
3374 if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&status) && !status)
3375 return RFKILL_STATE_HARD_BLOCKED;
3376
3377 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3378 if (dbg_wwanemul)
3379 return (tpacpi_wwan_emulstate) ?
3380 RFKILL_STATE_UNBLOCKED : RFKILL_STATE_SOFT_BLOCKED;
3381 #endif
3382
3383 if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
3384 return -EIO;
3385
3386 return ((status & TP_ACPI_WANCARD_RADIOSSW) != 0) ?
3387 RFKILL_STATE_UNBLOCKED : RFKILL_STATE_SOFT_BLOCKED;
3388 }
3389
3390 static void wan_update_rfk(void)
3391 {
3392 int status;
3393
3394 if (!tpacpi_wan_rfkill)
3395 return;
3396
3397 status = wan_get_radiosw();
3398 if (status < 0)
3399 return;
3400 rfkill_force_state(tpacpi_wan_rfkill, status);
3401
3402 vdbg_printk(TPACPI_DBG_RFKILL,
3403 "forced rfkill state to %d\n",
3404 status);
3405 }
3406
3407 static int wan_set_radiosw(int radio_on, int update_rfk)
3408 {
3409 int status;
3410
3411 if (!tp_features.wan)
3412 return -ENODEV;
3413
3414 /* WLSW overrides bluetooth in firmware/hardware, but there is no
3415 * reason to risk weird behaviour. */
3416 if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&status) && !status
3417 && radio_on)
3418 return -EPERM;
3419
3420 vdbg_printk(TPACPI_DBG_RFKILL,
3421 "will %s WWAN\n", radio_on ? "enable" : "disable");
3422
3423 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3424 if (dbg_wwanemul) {
3425 tpacpi_wwan_emulstate = !!radio_on;
3426 if (update_rfk)
3427 wan_update_rfk();
3428 return 0;
3429 }
3430 #endif
3431
3432 /* We make sure to keep TP_ACPI_WANCARD_RESUMECTRL off */
3433 if (radio_on)
3434 status = TP_ACPI_WANCARD_RADIOSSW;
3435 else
3436 status = 0;
3437 if (!acpi_evalf(hkey_handle, NULL, "SWAN", "vd", status))
3438 return -EIO;
3439
3440 if (update_rfk)
3441 wan_update_rfk();
3442
3443 return 0;
3444 }
3445
3446 /* sysfs wan enable ---------------------------------------------------- */
3447 static ssize_t wan_enable_show(struct device *dev,
3448 struct device_attribute *attr,
3449 char *buf)
3450 {
3451 int status;
3452
3453 printk_deprecated_rfkill_attribute("wwan_enable");
3454
3455 status = wan_get_radiosw();
3456 if (status < 0)
3457 return status;
3458
3459 return snprintf(buf, PAGE_SIZE, "%d\n",
3460 (status == RFKILL_STATE_UNBLOCKED) ? 1 : 0);
3461 }
3462
3463 static ssize_t wan_enable_store(struct device *dev,
3464 struct device_attribute *attr,
3465 const char *buf, size_t count)
3466 {
3467 unsigned long t;
3468 int res;
3469
3470 printk_deprecated_rfkill_attribute("wwan_enable");
3471
3472 if (parse_strtoul(buf, 1, &t))
3473 return -EINVAL;
3474
3475 tpacpi_disclose_usertask("wwan_enable", "set to %ld\n", t);
3476
3477 res = wan_set_radiosw(t, 1);
3478
3479 return (res) ? res : count;
3480 }
3481
3482 static struct device_attribute dev_attr_wan_enable =
3483 __ATTR(wwan_enable, S_IWUSR | S_IRUGO,
3484 wan_enable_show, wan_enable_store);
3485
3486 /* --------------------------------------------------------------------- */
3487
3488 static struct attribute *wan_attributes[] = {
3489 &dev_attr_wan_enable.attr,
3490 NULL
3491 };
3492
3493 static const struct attribute_group wan_attr_group = {
3494 .attrs = wan_attributes,
3495 };
3496
3497 static int tpacpi_wan_rfk_get(void *data, enum rfkill_state *state)
3498 {
3499 int wans = wan_get_radiosw();
3500
3501 if (wans < 0)
3502 return wans;
3503
3504 *state = wans;
3505 return 0;
3506 }
3507
3508 static int tpacpi_wan_rfk_set(void *data, enum rfkill_state state)
3509 {
3510 dbg_printk(TPACPI_DBG_RFKILL,
3511 "request to change radio state to %d\n", state);
3512 return wan_set_radiosw((state == RFKILL_STATE_UNBLOCKED), 0);
3513 }
3514
3515 static void wan_shutdown(void)
3516 {
3517 /* Order firmware to save current state to NVRAM */
3518 if (!acpi_evalf(NULL, NULL, "\\WGSV", "vd",
3519 TP_ACPI_WGSV_SAVE_STATE))
3520 printk(TPACPI_NOTICE
3521 "failed to save WWAN state to NVRAM\n");
3522 else
3523 vdbg_printk(TPACPI_DBG_RFKILL,
3524 "WWAN state saved to NVRAM\n");
3525 }
3526
3527 static void wan_exit(void)
3528 {
3529 wan_shutdown();
3530
3531 if (tpacpi_wan_rfkill)
3532 rfkill_unregister(tpacpi_wan_rfkill);
3533
3534 sysfs_remove_group(&tpacpi_pdev->dev.kobj,
3535 &wan_attr_group);
3536 }
3537
3538 static int __init wan_init(struct ibm_init_struct *iibm)
3539 {
3540 int res;
3541 int status = 0;
3542
3543 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
3544 "initializing wan subdriver\n");
3545
3546 TPACPI_ACPIHANDLE_INIT(hkey);
3547
3548 tp_features.wan = hkey_handle &&
3549 acpi_evalf(hkey_handle, &status, "GWAN", "qd");
3550
3551 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
3552 "wan is %s, status 0x%02x\n",
3553 str_supported(tp_features.wan),
3554 status);
3555
3556 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3557 if (dbg_wwanemul) {
3558 tp_features.wan = 1;
3559 printk(TPACPI_INFO
3560 "wwan switch emulation enabled\n");
3561 } else
3562 #endif
3563 if (tp_features.wan &&
3564 !(status & TP_ACPI_WANCARD_HWPRESENT)) {
3565 /* no wan hardware present in system */
3566 tp_features.wan = 0;
3567 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
3568 "wan hardware not installed\n");
3569 }
3570
3571 if (!tp_features.wan)
3572 return 1;
3573
3574 res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
3575 &wan_attr_group);
3576 if (res)
3577 return res;
3578
3579 res = tpacpi_new_rfkill(TPACPI_RFK_WWAN_SW_ID,
3580 &tpacpi_wan_rfkill,
3581 RFKILL_TYPE_WWAN,
3582 TPACPI_RFK_WWAN_SW_NAME,
3583 true,
3584 tpacpi_wan_rfk_set,
3585 tpacpi_wan_rfk_get);
3586 if (res) {
3587 wan_exit();
3588 return res;
3589 }
3590
3591 return 0;
3592 }
3593
3594 /* procfs -------------------------------------------------------------- */
3595 static int wan_read(char *p)
3596 {
3597 int len = 0;
3598 int status = wan_get_radiosw();
3599
3600 tpacpi_disclose_usertask("procfs wan", "read");
3601
3602 if (!tp_features.wan)
3603 len += sprintf(p + len, "status:\t\tnot supported\n");
3604 else {
3605 len += sprintf(p + len, "status:\t\t%s\n",
3606 (status == RFKILL_STATE_UNBLOCKED) ?
3607 "enabled" : "disabled");
3608 len += sprintf(p + len, "commands:\tenable, disable\n");
3609 }
3610
3611 return len;
3612 }
3613
3614 static int wan_write(char *buf)
3615 {
3616 char *cmd;
3617 int state = -1;
3618
3619 if (!tp_features.wan)
3620 return -ENODEV;
3621
3622 while ((cmd = next_cmd(&buf))) {
3623 if (strlencmp(cmd, "enable") == 0) {
3624 state = 1;
3625 } else if (strlencmp(cmd, "disable") == 0) {
3626 state = 0;
3627 } else
3628 return -EINVAL;
3629 }
3630
3631 if (state != -1) {
3632 tpacpi_disclose_usertask("procfs wan",
3633 "attempt to %s\n",
3634 state ? "enable" : "disable");
3635 wan_set_radiosw(state, 1);
3636 }
3637
3638 return 0;
3639 }
3640
3641 static struct ibm_struct wan_driver_data = {
3642 .name = "wan",
3643 .read = wan_read,
3644 .write = wan_write,
3645 .exit = wan_exit,
3646 .suspend = wan_suspend,
3647 .shutdown = wan_shutdown,
3648 };
3649
3650 /*************************************************************************
3651 * UWB subdriver
3652 */
3653
3654 enum {
3655 /* ACPI GUWB/SUWB bits */
3656 TP_ACPI_UWB_HWPRESENT = 0x01, /* UWB hw available */
3657 TP_ACPI_UWB_RADIOSSW = 0x02, /* UWB radio enabled */
3658 };
3659
3660 #define TPACPI_RFK_UWB_SW_NAME "tpacpi_uwb_sw"
3661
3662 static struct rfkill *tpacpi_uwb_rfkill;
3663
3664 static int uwb_get_radiosw(void)
3665 {
3666 int status;
3667
3668 if (!tp_features.uwb)
3669 return -ENODEV;
3670
3671 /* WLSW overrides UWB in firmware/hardware, reflect that */
3672 if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&status) && !status)
3673 return RFKILL_STATE_HARD_BLOCKED;
3674
3675 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3676 if (dbg_uwbemul)
3677 return (tpacpi_uwb_emulstate) ?
3678 RFKILL_STATE_UNBLOCKED : RFKILL_STATE_SOFT_BLOCKED;
3679 #endif
3680
3681 if (!acpi_evalf(hkey_handle, &status, "GUWB", "d"))
3682 return -EIO;
3683
3684 return ((status & TP_ACPI_UWB_RADIOSSW) != 0) ?
3685 RFKILL_STATE_UNBLOCKED : RFKILL_STATE_SOFT_BLOCKED;
3686 }
3687
3688 static void uwb_update_rfk(void)
3689 {
3690 int status;
3691
3692 if (!tpacpi_uwb_rfkill)
3693 return;
3694
3695 status = uwb_get_radiosw();
3696 if (status < 0)
3697 return;
3698 rfkill_force_state(tpacpi_uwb_rfkill, status);
3699
3700 vdbg_printk(TPACPI_DBG_RFKILL,
3701 "forced rfkill state to %d\n",
3702 status);
3703 }
3704
3705 static int uwb_set_radiosw(int radio_on, int update_rfk)
3706 {
3707 int status;
3708
3709 if (!tp_features.uwb)
3710 return -ENODEV;
3711
3712 /* WLSW overrides UWB in firmware/hardware, but there is no
3713 * reason to risk weird behaviour. */
3714 if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&status) && !status
3715 && radio_on)
3716 return -EPERM;
3717
3718 vdbg_printk(TPACPI_DBG_RFKILL,
3719 "will %s UWB\n", radio_on ? "enable" : "disable");
3720
3721 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3722 if (dbg_uwbemul) {
3723 tpacpi_uwb_emulstate = !!radio_on;
3724 if (update_rfk)
3725 uwb_update_rfk();
3726 return 0;
3727 }
3728 #endif
3729
3730 status = (radio_on) ? TP_ACPI_UWB_RADIOSSW : 0;
3731 if (!acpi_evalf(hkey_handle, NULL, "SUWB", "vd", status))
3732 return -EIO;
3733
3734 if (update_rfk)
3735 uwb_update_rfk();
3736
3737 return 0;
3738 }
3739
3740 /* --------------------------------------------------------------------- */
3741
3742 static int tpacpi_uwb_rfk_get(void *data, enum rfkill_state *state)
3743 {
3744 int uwbs = uwb_get_radiosw();
3745
3746 if (uwbs < 0)
3747 return uwbs;
3748
3749 *state = uwbs;
3750 return 0;
3751 }
3752
3753 static int tpacpi_uwb_rfk_set(void *data, enum rfkill_state state)
3754 {
3755 dbg_printk(TPACPI_DBG_RFKILL,
3756 "request to change radio state to %d\n", state);
3757 return uwb_set_radiosw((state == RFKILL_STATE_UNBLOCKED), 0);
3758 }
3759
3760 static void uwb_exit(void)
3761 {
3762 if (tpacpi_uwb_rfkill)
3763 rfkill_unregister(tpacpi_uwb_rfkill);
3764 }
3765
3766 static int __init uwb_init(struct ibm_init_struct *iibm)
3767 {
3768 int res;
3769 int status = 0;
3770
3771 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
3772 "initializing uwb subdriver\n");
3773
3774 TPACPI_ACPIHANDLE_INIT(hkey);
3775
3776 tp_features.uwb = hkey_handle &&
3777 acpi_evalf(hkey_handle, &status, "GUWB", "qd");
3778
3779 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
3780 "uwb is %s, status 0x%02x\n",
3781 str_supported(tp_features.uwb),
3782 status);
3783
3784 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3785 if (dbg_uwbemul) {
3786 tp_features.uwb = 1;
3787 printk(TPACPI_INFO
3788 "uwb switch emulation enabled\n");
3789 } else
3790 #endif
3791 if (tp_features.uwb &&
3792 !(status & TP_ACPI_UWB_HWPRESENT)) {
3793 /* no uwb hardware present in system */
3794 tp_features.uwb = 0;
3795 dbg_printk(TPACPI_DBG_INIT,
3796 "uwb hardware not installed\n");
3797 }
3798
3799 if (!tp_features.uwb)
3800 return 1;
3801
3802 res = tpacpi_new_rfkill(TPACPI_RFK_UWB_SW_ID,
3803 &tpacpi_uwb_rfkill,
3804 RFKILL_TYPE_UWB,
3805 TPACPI_RFK_UWB_SW_NAME,
3806 false,
3807 tpacpi_uwb_rfk_set,
3808 tpacpi_uwb_rfk_get);
3809
3810 return res;
3811 }
3812
3813 static struct ibm_struct uwb_driver_data = {
3814 .name = "uwb",
3815 .exit = uwb_exit,
3816 .flags.experimental = 1,
3817 };
3818
3819 /*************************************************************************
3820 * Video subdriver
3821 */
3822
3823 #ifdef CONFIG_THINKPAD_ACPI_VIDEO
3824
3825 enum video_access_mode {
3826 TPACPI_VIDEO_NONE = 0,
3827 TPACPI_VIDEO_570, /* 570 */
3828 TPACPI_VIDEO_770, /* 600e/x, 770e, 770x */
3829 TPACPI_VIDEO_NEW, /* all others */
3830 };
3831
3832 enum { /* video status flags, based on VIDEO_570 */
3833 TP_ACPI_VIDEO_S_LCD = 0x01, /* LCD output enabled */
3834 TP_ACPI_VIDEO_S_CRT = 0x02, /* CRT output enabled */
3835 TP_ACPI_VIDEO_S_DVI = 0x08, /* DVI output enabled */
3836 };
3837
3838 enum { /* TPACPI_VIDEO_570 constants */
3839 TP_ACPI_VIDEO_570_PHSCMD = 0x87, /* unknown magic constant :( */
3840 TP_ACPI_VIDEO_570_PHSMASK = 0x03, /* PHS bits that map to
3841 * video_status_flags */
3842 TP_ACPI_VIDEO_570_PHS2CMD = 0x8b, /* unknown magic constant :( */
3843 TP_ACPI_VIDEO_570_PHS2SET = 0x80, /* unknown magic constant :( */
3844 };
3845
3846 static enum video_access_mode video_supported;
3847 static int video_orig_autosw;
3848
3849 static int video_autosw_get(void);
3850 static int video_autosw_set(int enable);
3851
3852 TPACPI_HANDLE(vid2, root, "\\_SB.PCI0.AGPB.VID"); /* G41 */
3853
3854 static int __init video_init(struct ibm_init_struct *iibm)
3855 {
3856 int ivga;
3857
3858 vdbg_printk(TPACPI_DBG_INIT, "initializing video subdriver\n");
3859
3860 TPACPI_ACPIHANDLE_INIT(vid);
3861 TPACPI_ACPIHANDLE_INIT(vid2);
3862
3863 if (vid2_handle && acpi_evalf(NULL, &ivga, "\\IVGA", "d") && ivga)
3864 /* G41, assume IVGA doesn't change */
3865 vid_handle = vid2_handle;
3866
3867 if (!vid_handle)
3868 /* video switching not supported on R30, R31 */
3869 video_supported = TPACPI_VIDEO_NONE;
3870 else if (acpi_evalf(vid_handle, &video_orig_autosw, "SWIT", "qd"))
3871 /* 570 */
3872 video_supported = TPACPI_VIDEO_570;
3873 else if (acpi_evalf(vid_handle, &video_orig_autosw, "^VADL", "qd"))
3874 /* 600e/x, 770e, 770x */
3875 video_supported = TPACPI_VIDEO_770;
3876 else
3877 /* all others */
3878 video_supported = TPACPI_VIDEO_NEW;
3879
3880 vdbg_printk(TPACPI_DBG_INIT, "video is %s, mode %d\n",
3881 str_supported(video_supported != TPACPI_VIDEO_NONE),
3882 video_supported);
3883
3884 return (video_supported != TPACPI_VIDEO_NONE)? 0 : 1;
3885 }
3886
3887 static void video_exit(void)
3888 {
3889 dbg_printk(TPACPI_DBG_EXIT,
3890 "restoring original video autoswitch mode\n");
3891 if (video_autosw_set(video_orig_autosw))
3892 printk(TPACPI_ERR "error while trying to restore original "
3893 "video autoswitch mode\n");
3894 }
3895
3896 static int video_outputsw_get(void)
3897 {
3898 int status = 0;
3899 int i;
3900
3901 switch (video_supported) {
3902 case TPACPI_VIDEO_570:
3903 if (!acpi_evalf(NULL, &i, "\\_SB.PHS", "dd",
3904 TP_ACPI_VIDEO_570_PHSCMD))
3905 return -EIO;
3906 status = i & TP_ACPI_VIDEO_570_PHSMASK;
3907 break;
3908 case TPACPI_VIDEO_770:
3909 if (!acpi_evalf(NULL, &i, "\\VCDL", "d"))
3910 return -EIO;
3911 if (i)
3912 status |= TP_ACPI_VIDEO_S_LCD;
3913 if (!acpi_evalf(NULL, &i, "\\VCDC", "d"))
3914 return -EIO;
3915 if (i)
3916 status |= TP_ACPI_VIDEO_S_CRT;
3917 break;
3918 case TPACPI_VIDEO_NEW:
3919 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 1) ||
3920 !acpi_evalf(NULL, &i, "\\VCDC", "d"))
3921 return -EIO;
3922 if (i)
3923 status |= TP_ACPI_VIDEO_S_CRT;
3924
3925 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0) ||
3926 !acpi_evalf(NULL, &i, "\\VCDL", "d"))
3927 return -EIO;
3928 if (i)
3929 status |= TP_ACPI_VIDEO_S_LCD;
3930 if (!acpi_evalf(NULL, &i, "\\VCDD", "d"))
3931 return -EIO;
3932 if (i)
3933 status |= TP_ACPI_VIDEO_S_DVI;
3934 break;
3935 default:
3936 return -ENOSYS;
3937 }
3938
3939 return status;
3940 }
3941
3942 static int video_outputsw_set(int status)
3943 {
3944 int autosw;
3945 int res = 0;
3946
3947 switch (video_supported) {
3948 case TPACPI_VIDEO_570:
3949 res = acpi_evalf(NULL, NULL,
3950 "\\_SB.PHS2", "vdd",
3951 TP_ACPI_VIDEO_570_PHS2CMD,
3952 status | TP_ACPI_VIDEO_570_PHS2SET);
3953 break;
3954 case TPACPI_VIDEO_770:
3955 autosw = video_autosw_get();
3956 if (autosw < 0)
3957 return autosw;
3958
3959 res = video_autosw_set(1);
3960 if (res)
3961 return res;
3962 res = acpi_evalf(vid_handle, NULL,
3963 "ASWT", "vdd", status * 0x100, 0);
3964 if (!autosw && video_autosw_set(autosw)) {
3965 printk(TPACPI_ERR
3966 "video auto-switch left enabled due to error\n");
3967 return -EIO;
3968 }
3969 break;
3970 case TPACPI_VIDEO_NEW:
3971 res = acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0x80) &&
3972 acpi_evalf(NULL, NULL, "\\VSDS", "vdd", status, 1);
3973 break;
3974 default:
3975 return -ENOSYS;
3976 }
3977
3978 return (res)? 0 : -EIO;
3979 }
3980
3981 static int video_autosw_get(void)
3982 {
3983 int autosw = 0;
3984
3985 switch (video_supported) {
3986 case TPACPI_VIDEO_570:
3987 if (!acpi_evalf(vid_handle, &autosw, "SWIT", "d"))
3988 return -EIO;
3989 break;
3990 case TPACPI_VIDEO_770:
3991 case TPACPI_VIDEO_NEW:
3992 if (!acpi_evalf(vid_handle, &autosw, "^VDEE", "d"))
3993 return -EIO;
3994 break;
3995 default:
3996 return -ENOSYS;
3997 }
3998
3999 return autosw & 1;
4000 }
4001
4002 static int video_autosw_set(int enable)
4003 {
4004 if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", (enable)? 1 : 0))
4005 return -EIO;
4006 return 0;
4007 }
4008
4009 static int video_outputsw_cycle(void)
4010 {
4011 int autosw = video_autosw_get();
4012 int res;
4013
4014 if (autosw < 0)
4015 return autosw;
4016
4017 switch (video_supported) {
4018 case TPACPI_VIDEO_570:
4019 res = video_autosw_set(1);
4020 if (res)
4021 return res;
4022 res = acpi_evalf(ec_handle, NULL, "_Q16", "v");
4023 break;
4024 case TPACPI_VIDEO_770:
4025 case TPACPI_VIDEO_NEW:
4026 res = video_autosw_set(1);
4027 if (res)
4028 return res;
4029 res = acpi_evalf(vid_handle, NULL, "VSWT", "v");
4030 break;
4031 default:
4032 return -ENOSYS;
4033 }
4034 if (!autosw && video_autosw_set(autosw)) {
4035 printk(TPACPI_ERR
4036 "video auto-switch left enabled due to error\n");
4037 return -EIO;
4038 }
4039
4040 return (res)? 0 : -EIO;
4041 }
4042
4043 static int video_expand_toggle(void)
4044 {
4045 switch (video_supported) {
4046 case TPACPI_VIDEO_570:
4047 return acpi_evalf(ec_handle, NULL, "_Q17", "v")?
4048 0 : -EIO;
4049 case TPACPI_VIDEO_770:
4050 return acpi_evalf(vid_handle, NULL, "VEXP", "v")?
4051 0 : -EIO;
4052 case TPACPI_VIDEO_NEW:
4053 return acpi_evalf(NULL, NULL, "\\VEXP", "v")?
4054 0 : -EIO;
4055 default:
4056 return -ENOSYS;
4057 }
4058 /* not reached */
4059 }
4060
4061 static int video_read(char *p)
4062 {
4063 int status, autosw;
4064 int len = 0;
4065
4066 if (video_supported == TPACPI_VIDEO_NONE) {
4067 len += sprintf(p + len, "status:\t\tnot supported\n");
4068 return len;
4069 }
4070
4071 status = video_outputsw_get();
4072 if (status < 0)
4073 return status;
4074
4075 autosw = video_autosw_get();
4076 if (autosw < 0)
4077 return autosw;
4078
4079 len += sprintf(p + len, "status:\t\tsupported\n");
4080 len += sprintf(p + len, "lcd:\t\t%s\n", enabled(status, 0));
4081 len += sprintf(p + len, "crt:\t\t%s\n", enabled(status, 1));
4082 if (video_supported == TPACPI_VIDEO_NEW)
4083 len += sprintf(p + len, "dvi:\t\t%s\n", enabled(status, 3));
4084 len += sprintf(p + len, "auto:\t\t%s\n", enabled(autosw, 0));
4085 len += sprintf(p + len, "commands:\tlcd_enable, lcd_disable\n");
4086 len += sprintf(p + len, "commands:\tcrt_enable, crt_disable\n");
4087 if (video_supported == TPACPI_VIDEO_NEW)
4088 len += sprintf(p + len, "commands:\tdvi_enable, dvi_disable\n");
4089 len += sprintf(p + len, "commands:\tauto_enable, auto_disable\n");
4090 len += sprintf(p + len, "commands:\tvideo_switch, expand_toggle\n");
4091
4092 return len;
4093 }
4094
4095 static int video_write(char *buf)
4096 {
4097 char *cmd;
4098 int enable, disable, status;
4099 int res;
4100
4101 if (video_supported == TPACPI_VIDEO_NONE)
4102 return -ENODEV;
4103
4104 enable = 0;
4105 disable = 0;
4106
4107 while ((cmd = next_cmd(&buf))) {
4108 if (strlencmp(cmd, "lcd_enable") == 0) {
4109 enable |= TP_ACPI_VIDEO_S_LCD;
4110 } else if (strlencmp(cmd, "lcd_disable") == 0) {
4111 disable |= TP_ACPI_VIDEO_S_LCD;
4112 } else if (strlencmp(cmd, "crt_enable") == 0) {
4113 enable |= TP_ACPI_VIDEO_S_CRT;
4114 } else if (strlencmp(cmd, "crt_disable") == 0) {
4115 disable |= TP_ACPI_VIDEO_S_CRT;
4116 } else if (video_supported == TPACPI_VIDEO_NEW &&
4117 strlencmp(cmd, "dvi_enable") == 0) {
4118 enable |= TP_ACPI_VIDEO_S_DVI;
4119 } else if (video_supported == TPACPI_VIDEO_NEW &&
4120 strlencmp(cmd, "dvi_disable") == 0) {
4121 disable |= TP_ACPI_VIDEO_S_DVI;
4122 } else if (strlencmp(cmd, "auto_enable") == 0) {
4123 res = video_autosw_set(1);
4124 if (res)
4125 return res;
4126 } else if (strlencmp(cmd, "auto_disable") == 0) {
4127 res = video_autosw_set(0);
4128 if (res)
4129 return res;
4130 } else if (strlencmp(cmd, "video_switch") == 0) {
4131 res = video_outputsw_cycle();
4132 if (res)
4133 return res;
4134 } else if (strlencmp(cmd, "expand_toggle") == 0) {
4135 res = video_expand_toggle();
4136 if (res)
4137 return res;
4138 } else
4139 return -EINVAL;
4140 }
4141
4142 if (enable || disable) {
4143 status = video_outputsw_get();
4144 if (status < 0)
4145 return status;
4146 res = video_outputsw_set((status & ~disable) | enable);
4147 if (res)
4148 return res;
4149 }
4150
4151 return 0;
4152 }
4153
4154 static struct ibm_struct video_driver_data = {
4155 .name = "video",
4156 .read = video_read,
4157 .write = video_write,
4158 .exit = video_exit,
4159 };
4160
4161 #endif /* CONFIG_THINKPAD_ACPI_VIDEO */
4162
4163 /*************************************************************************
4164 * Light (thinklight) subdriver
4165 */
4166
4167 TPACPI_HANDLE(lght, root, "\\LGHT"); /* A21e, A2xm/p, T20-22, X20-21 */
4168 TPACPI_HANDLE(ledb, ec, "LEDB"); /* G4x */
4169
4170 static int light_get_status(void)
4171 {
4172 int status = 0;
4173
4174 if (tp_features.light_status) {
4175 if (!acpi_evalf(ec_handle, &status, "KBLT", "d"))
4176 return -EIO;
4177 return (!!status);
4178 }
4179
4180 return -ENXIO;
4181 }
4182
4183 static int light_set_status(int status)
4184 {
4185 int rc;
4186
4187 if (tp_features.light) {
4188 if (cmos_handle) {
4189 rc = acpi_evalf(cmos_handle, NULL, NULL, "vd",
4190 (status)?
4191 TP_CMOS_THINKLIGHT_ON :
4192 TP_CMOS_THINKLIGHT_OFF);
4193 } else {
4194 rc = acpi_evalf(lght_handle, NULL, NULL, "vd",
4195 (status)? 1 : 0);
4196 }
4197 return (rc)? 0 : -EIO;
4198 }
4199
4200 return -ENXIO;
4201 }
4202
4203 static void light_set_status_worker(struct work_struct *work)
4204 {
4205 struct tpacpi_led_classdev *data =
4206 container_of(work, struct tpacpi_led_classdev, work);
4207
4208 if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING))
4209 light_set_status((data->new_brightness != LED_OFF));
4210 }
4211
4212 static void light_sysfs_set(struct led_classdev *led_cdev,
4213 enum led_brightness brightness)
4214 {
4215 struct tpacpi_led_classdev *data =
4216 container_of(led_cdev,
4217 struct tpacpi_led_classdev,
4218 led_classdev);
4219 data->new_brightness = brightness;
4220 queue_work(tpacpi_wq, &data->work);
4221 }
4222
4223 static enum led_brightness light_sysfs_get(struct led_classdev *led_cdev)
4224 {
4225 return (light_get_status() == 1)? LED_FULL : LED_OFF;
4226 }
4227
4228 static struct tpacpi_led_classdev tpacpi_led_thinklight = {
4229 .led_classdev = {
4230 .name = "tpacpi::thinklight",
4231 .brightness_set = &light_sysfs_set,
4232 .brightness_get = &light_sysfs_get,
4233 }
4234 };
4235
4236 static int __init light_init(struct ibm_init_struct *iibm)
4237 {
4238 int rc;
4239
4240 vdbg_printk(TPACPI_DBG_INIT, "initializing light subdriver\n");
4241
4242 TPACPI_ACPIHANDLE_INIT(ledb);
4243 TPACPI_ACPIHANDLE_INIT(lght);
4244 TPACPI_ACPIHANDLE_INIT(cmos);
4245 INIT_WORK(&tpacpi_led_thinklight.work, light_set_status_worker);
4246
4247 /* light not supported on 570, 600e/x, 770e, 770x, G4x, R30, R31 */
4248 tp_features.light = (cmos_handle || lght_handle) && !ledb_handle;
4249
4250 if (tp_features.light)
4251 /* light status not supported on
4252 570, 600e/x, 770e, 770x, G4x, R30, R31, R32, X20 */
4253 tp_features.light_status =
4254 acpi_evalf(ec_handle, NULL, "KBLT", "qv");
4255
4256 vdbg_printk(TPACPI_DBG_INIT, "light is %s, light status is %s\n",
4257 str_supported(tp_features.light),
4258 str_supported(tp_features.light_status));
4259
4260 if (!tp_features.light)
4261 return 1;
4262
4263 rc = led_classdev_register(&tpacpi_pdev->dev,
4264 &tpacpi_led_thinklight.led_classdev);
4265
4266 if (rc < 0) {
4267 tp_features.light = 0;
4268 tp_features.light_status = 0;
4269 } else {
4270 rc = 0;
4271 }
4272
4273 return rc;
4274 }
4275
4276 static void light_exit(void)
4277 {
4278 led_classdev_unregister(&tpacpi_led_thinklight.led_classdev);
4279 if (work_pending(&tpacpi_led_thinklight.work))
4280 flush_workqueue(tpacpi_wq);
4281 }
4282
4283 static int light_read(char *p)
4284 {
4285 int len = 0;
4286 int status;
4287
4288 if (!tp_features.light) {
4289 len += sprintf(p + len, "status:\t\tnot supported\n");
4290 } else if (!tp_features.light_status) {
4291 len += sprintf(p + len, "status:\t\tunknown\n");
4292 len += sprintf(p + len, "commands:\ton, off\n");
4293 } else {
4294 status = light_get_status();
4295 if (status < 0)
4296 return status;
4297 len += sprintf(p + len, "status:\t\t%s\n", onoff(status, 0));
4298 len += sprintf(p + len, "commands:\ton, off\n");
4299 }
4300
4301 return len;
4302 }
4303
4304 static int light_write(char *buf)
4305 {
4306 char *cmd;
4307 int newstatus = 0;
4308
4309 if (!tp_features.light)
4310 return -ENODEV;
4311
4312 while ((cmd = next_cmd(&buf))) {
4313 if (strlencmp(cmd, "on") == 0) {
4314 newstatus = 1;
4315 } else if (strlencmp(cmd, "off") == 0) {
4316 newstatus = 0;
4317 } else
4318 return -EINVAL;
4319 }
4320
4321 return light_set_status(newstatus);
4322 }
4323
4324 static struct ibm_struct light_driver_data = {
4325 .name = "light",
4326 .read = light_read,
4327 .write = light_write,
4328 .exit = light_exit,
4329 };
4330
4331 /*************************************************************************
4332 * Dock subdriver
4333 */
4334
4335 #ifdef CONFIG_THINKPAD_ACPI_DOCK
4336
4337 static void dock_notify(struct ibm_struct *ibm, u32 event);
4338 static int dock_read(char *p);
4339 static int dock_write(char *buf);
4340
4341 TPACPI_HANDLE(dock, root, "\\_SB.GDCK", /* X30, X31, X40 */
4342 "\\_SB.PCI0.DOCK", /* 600e/x,770e,770x,A2xm/p,T20-22,X20-21 */
4343 "\\_SB.PCI0.PCI1.DOCK", /* all others */
4344 "\\_SB.PCI.ISA.SLCE", /* 570 */
4345 ); /* A21e,G4x,R30,R31,R32,R40,R40e,R50e */
4346
4347 /* don't list other alternatives as we install a notify handler on the 570 */
4348 TPACPI_HANDLE(pci, root, "\\_SB.PCI"); /* 570 */
4349
4350 static const struct acpi_device_id ibm_pci_device_ids[] = {
4351 {PCI_ROOT_HID_STRING, 0},
4352 {"", 0},
4353 };
4354
4355 static struct tp_acpi_drv_struct ibm_dock_acpidriver[2] = {
4356 {
4357 .notify = dock_notify,
4358 .handle = &dock_handle,
4359 .type = ACPI_SYSTEM_NOTIFY,
4360 },
4361 {
4362 /* THIS ONE MUST NEVER BE USED FOR DRIVER AUTOLOADING.
4363 * We just use it to get notifications of dock hotplug
4364 * in very old thinkpads */
4365 .hid = ibm_pci_device_ids,
4366 .notify = dock_notify,
4367 .handle = &pci_handle,
4368 .type = ACPI_SYSTEM_NOTIFY,
4369 },
4370 };
4371
4372 static struct ibm_struct dock_driver_data[2] = {
4373 {
4374 .name = "dock",
4375 .read = dock_read,
4376 .write = dock_write,
4377 .acpi = &ibm_dock_acpidriver[0],
4378 },
4379 {
4380 .name = "dock",
4381 .acpi = &ibm_dock_acpidriver[1],
4382 },
4383 };
4384
4385 #define dock_docked() (_sta(dock_handle) & 1)
4386
4387 static int __init dock_init(struct ibm_init_struct *iibm)
4388 {
4389 vdbg_printk(TPACPI_DBG_INIT, "initializing dock subdriver\n");
4390
4391 TPACPI_ACPIHANDLE_INIT(dock);
4392
4393 vdbg_printk(TPACPI_DBG_INIT, "dock is %s\n",
4394 str_supported(dock_handle != NULL));
4395
4396 return (dock_handle)? 0 : 1;
4397 }
4398
4399 static int __init dock_init2(struct ibm_init_struct *iibm)
4400 {
4401 int dock2_needed;
4402
4403 vdbg_printk(TPACPI_DBG_INIT, "initializing dock subdriver part 2\n");
4404
4405 if (dock_driver_data[0].flags.acpi_driver_registered &&
4406 dock_driver_data[0].flags.acpi_notify_installed) {
4407 TPACPI_ACPIHANDLE_INIT(pci);
4408 dock2_needed = (pci_handle != NULL);
4409 vdbg_printk(TPACPI_DBG_INIT,
4410 "dock PCI handler for the TP 570 is %s\n",
4411 str_supported(dock2_needed));
4412 } else {
4413 vdbg_printk(TPACPI_DBG_INIT,
4414 "dock subdriver part 2 not required\n");
4415 dock2_needed = 0;
4416 }
4417
4418 return (dock2_needed)? 0 : 1;
4419 }
4420
4421 static void dock_notify(struct ibm_struct *ibm, u32 event)
4422 {
4423 int docked = dock_docked();
4424 int pci = ibm->acpi->hid && ibm->acpi->device &&
4425 acpi_match_device_ids(ibm->acpi->device, ibm_pci_device_ids);
4426 int data;
4427
4428 if (event == 1 && !pci) /* 570 */
4429 data = 1; /* button */
4430 else if (event == 1 && pci) /* 570 */
4431 data = 3; /* dock */
4432 else if (event == 3 && docked)
4433 data = 1; /* button */
4434 else if (event == 3 && !docked)
4435 data = 2; /* undock */
4436 else if (event == 0 && docked)
4437 data = 3; /* dock */
4438 else {
4439 printk(TPACPI_ERR "unknown dock event %d, status %d\n",
4440 event, _sta(dock_handle));
4441 data = 0; /* unknown */
4442 }
4443 acpi_bus_generate_proc_event(ibm->acpi->device, event, data);
4444 acpi_bus_generate_netlink_event(ibm->acpi->device->pnp.device_class,
4445 dev_name(&ibm->acpi->device->dev),
4446 event, data);
4447 }
4448
4449 static int dock_read(char *p)
4450 {
4451 int len = 0;
4452 int docked = dock_docked();
4453
4454 if (!dock_handle)
4455 len += sprintf(p + len, "status:\t\tnot supported\n");
4456 else if (!docked)
4457 len += sprintf(p + len, "status:\t\tundocked\n");
4458 else {
4459 len += sprintf(p + len, "status:\t\tdocked\n");
4460 len += sprintf(p + len, "commands:\tdock, undock\n");
4461 }
4462
4463 return len;
4464 }
4465
4466 static int dock_write(char *buf)
4467 {
4468 char *cmd;
4469
4470 if (!dock_docked())
4471 return -ENODEV;
4472
4473 while ((cmd = next_cmd(&buf))) {
4474 if (strlencmp(cmd, "undock") == 0) {
4475 if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 0) ||
4476 !acpi_evalf(dock_handle, NULL, "_EJ0", "vd", 1))
4477 return -EIO;
4478 } else if (strlencmp(cmd, "dock") == 0) {
4479 if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 1))
4480 return -EIO;
4481 } else
4482 return -EINVAL;
4483 }
4484
4485 return 0;
4486 }
4487
4488 #endif /* CONFIG_THINKPAD_ACPI_DOCK */
4489
4490 /*************************************************************************
4491 * Bay subdriver
4492 */
4493
4494 #ifdef CONFIG_THINKPAD_ACPI_BAY
4495
4496 TPACPI_HANDLE(bay, root, "\\_SB.PCI.IDE.SECN.MAST", /* 570 */
4497 "\\_SB.PCI0.IDE0.IDES.IDSM", /* 600e/x, 770e, 770x */
4498 "\\_SB.PCI0.SATA.SCND.MSTR", /* T60, X60, Z60 */
4499 "\\_SB.PCI0.IDE0.SCND.MSTR", /* all others */
4500 ); /* A21e, R30, R31 */
4501 TPACPI_HANDLE(bay_ej, bay, "_EJ3", /* 600e/x, A2xm/p, A3x */
4502 "_EJ0", /* all others */
4503 ); /* 570,A21e,G4x,R30,R31,R32,R40e,R50e */
4504 TPACPI_HANDLE(bay2, root, "\\_SB.PCI0.IDE0.PRIM.SLAV", /* A3x, R32 */
4505 "\\_SB.PCI0.IDE0.IDEP.IDPS", /* 600e/x, 770e, 770x */
4506 ); /* all others */
4507 TPACPI_HANDLE(bay2_ej, bay2, "_EJ3", /* 600e/x, 770e, A3x */
4508 "_EJ0", /* 770x */
4509 ); /* all others */
4510
4511 static int __init bay_init(struct ibm_init_struct *iibm)
4512 {
4513 vdbg_printk(TPACPI_DBG_INIT, "initializing bay subdriver\n");
4514
4515 TPACPI_ACPIHANDLE_INIT(bay);
4516 if (bay_handle)
4517 TPACPI_ACPIHANDLE_INIT(bay_ej);
4518 TPACPI_ACPIHANDLE_INIT(bay2);
4519 if (bay2_handle)
4520 TPACPI_ACPIHANDLE_INIT(bay2_ej);
4521
4522 tp_features.bay_status = bay_handle &&
4523 acpi_evalf(bay_handle, NULL, "_STA", "qv");
4524 tp_features.bay_status2 = bay2_handle &&
4525 acpi_evalf(bay2_handle, NULL, "_STA", "qv");
4526
4527 tp_features.bay_eject = bay_handle && bay_ej_handle &&
4528 (strlencmp(bay_ej_path, "_EJ0") == 0 || experimental);
4529 tp_features.bay_eject2 = bay2_handle && bay2_ej_handle &&
4530 (strlencmp(bay2_ej_path, "_EJ0") == 0 || experimental);
4531
4532 vdbg_printk(TPACPI_DBG_INIT,
4533 "bay 1: status %s, eject %s; bay 2: status %s, eject %s\n",
4534 str_supported(tp_features.bay_status),
4535 str_supported(tp_features.bay_eject),
4536 str_supported(tp_features.bay_status2),
4537 str_supported(tp_features.bay_eject2));
4538
4539 return (tp_features.bay_status || tp_features.bay_eject ||
4540 tp_features.bay_status2 || tp_features.bay_eject2)? 0 : 1;
4541 }
4542
4543 static void bay_notify(struct ibm_struct *ibm, u32 event)
4544 {
4545 acpi_bus_generate_proc_event(ibm->acpi->device, event, 0);
4546 acpi_bus_generate_netlink_event(ibm->acpi->device->pnp.device_class,
4547 dev_name(&ibm->acpi->device->dev),
4548 event, 0);
4549 }
4550
4551 #define bay_occupied(b) (_sta(b##_handle) & 1)
4552
4553 static int bay_read(char *p)
4554 {
4555 int len = 0;
4556 int occupied = bay_occupied(bay);
4557 int occupied2 = bay_occupied(bay2);
4558 int eject, eject2;
4559
4560 len += sprintf(p + len, "status:\t\t%s\n",
4561 tp_features.bay_status ?
4562 (occupied ? "occupied" : "unoccupied") :
4563 "not supported");
4564 if (tp_features.bay_status2)
4565 len += sprintf(p + len, "status2:\t%s\n", occupied2 ?
4566 "occupied" : "unoccupied");
4567
4568 eject = tp_features.bay_eject && occupied;
4569 eject2 = tp_features.bay_eject2 && occupied2;
4570
4571 if (eject && eject2)
4572 len += sprintf(p + len, "commands:\teject, eject2\n");
4573 else if (eject)
4574 len += sprintf(p + len, "commands:\teject\n");
4575 else if (eject2)
4576 len += sprintf(p + len, "commands:\teject2\n");
4577
4578 return len;
4579 }
4580
4581 static int bay_write(char *buf)
4582 {
4583 char *cmd;
4584
4585 if (!tp_features.bay_eject && !tp_features.bay_eject2)
4586 return -ENODEV;
4587
4588 while ((cmd = next_cmd(&buf))) {
4589 if (tp_features.bay_eject && strlencmp(cmd, "eject") == 0) {
4590 if (!acpi_evalf(bay_ej_handle, NULL, NULL, "vd", 1))
4591 return -EIO;
4592 } else if (tp_features.bay_eject2 &&
4593 strlencmp(cmd, "eject2") == 0) {
4594 if (!acpi_evalf(bay2_ej_handle, NULL, NULL, "vd", 1))
4595 return -EIO;
4596 } else
4597 return -EINVAL;
4598 }
4599
4600 return 0;
4601 }
4602
4603 static struct tp_acpi_drv_struct ibm_bay_acpidriver = {
4604 .notify = bay_notify,
4605 .handle = &bay_handle,
4606 .type = ACPI_SYSTEM_NOTIFY,
4607 };
4608
4609 static struct ibm_struct bay_driver_data = {
4610 .name = "bay",
4611 .read = bay_read,
4612 .write = bay_write,
4613 .acpi = &ibm_bay_acpidriver,
4614 };
4615
4616 #endif /* CONFIG_THINKPAD_ACPI_BAY */
4617
4618 /*************************************************************************
4619 * CMOS subdriver
4620 */
4621
4622 /* sysfs cmos_command -------------------------------------------------- */
4623 static ssize_t cmos_command_store(struct device *dev,
4624 struct device_attribute *attr,
4625 const char *buf, size_t count)
4626 {
4627 unsigned long cmos_cmd;
4628 int res;
4629
4630 if (parse_strtoul(buf, 21, &cmos_cmd))
4631 return -EINVAL;
4632
4633 res = issue_thinkpad_cmos_command(cmos_cmd);
4634 return (res)? res : count;
4635 }
4636
4637 static struct device_attribute dev_attr_cmos_command =
4638 __ATTR(cmos_command, S_IWUSR, NULL, cmos_command_store);
4639
4640 /* --------------------------------------------------------------------- */
4641
4642 static int __init cmos_init(struct ibm_init_struct *iibm)
4643 {
4644 int res;
4645
4646 vdbg_printk(TPACPI_DBG_INIT,
4647 "initializing cmos commands subdriver\n");
4648
4649 TPACPI_ACPIHANDLE_INIT(cmos);
4650
4651 vdbg_printk(TPACPI_DBG_INIT, "cmos commands are %s\n",
4652 str_supported(cmos_handle != NULL));
4653
4654 res = device_create_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
4655 if (res)
4656 return res;
4657
4658 return (cmos_handle)? 0 : 1;
4659 }
4660
4661 static void cmos_exit(void)
4662 {
4663 device_remove_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
4664 }
4665
4666 static int cmos_read(char *p)
4667 {
4668 int len = 0;
4669
4670 /* cmos not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
4671 R30, R31, T20-22, X20-21 */
4672 if (!cmos_handle)
4673 len += sprintf(p + len, "status:\t\tnot supported\n");
4674 else {
4675 len += sprintf(p + len, "status:\t\tsupported\n");
4676 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-21)\n");
4677 }
4678
4679 return len;
4680 }
4681
4682 static int cmos_write(char *buf)
4683 {
4684 char *cmd;
4685 int cmos_cmd, res;
4686
4687 while ((cmd = next_cmd(&buf))) {
4688 if (sscanf(cmd, "%u", &cmos_cmd) == 1 &&
4689 cmos_cmd >= 0 && cmos_cmd <= 21) {
4690 /* cmos_cmd set */
4691 } else
4692 return -EINVAL;
4693
4694 res = issue_thinkpad_cmos_command(cmos_cmd);
4695 if (res)
4696 return res;
4697 }
4698
4699 return 0;
4700 }
4701
4702 static struct ibm_struct cmos_driver_data = {
4703 .name = "cmos",
4704 .read = cmos_read,
4705 .write = cmos_write,
4706 .exit = cmos_exit,
4707 };
4708
4709 /*************************************************************************
4710 * LED subdriver
4711 */
4712
4713 enum led_access_mode {
4714 TPACPI_LED_NONE = 0,
4715 TPACPI_LED_570, /* 570 */
4716 TPACPI_LED_OLD, /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
4717 TPACPI_LED_NEW, /* all others */
4718 };
4719
4720 enum { /* For TPACPI_LED_OLD */
4721 TPACPI_LED_EC_HLCL = 0x0c, /* EC reg to get led to power on */
4722 TPACPI_LED_EC_HLBL = 0x0d, /* EC reg to blink a lit led */
4723 TPACPI_LED_EC_HLMS = 0x0e, /* EC reg to select led to command */
4724 };
4725
4726 enum led_status_t {
4727 TPACPI_LED_OFF = 0,
4728 TPACPI_LED_ON,
4729 TPACPI_LED_BLINK,
4730 };
4731
4732 static enum led_access_mode led_supported;
4733
4734 TPACPI_HANDLE(led, ec, "SLED", /* 570 */
4735 "SYSL", /* 600e/x, 770e, 770x, A21e, A2xm/p, */
4736 /* T20-22, X20-21 */
4737 "LED", /* all others */
4738 ); /* R30, R31 */
4739
4740 #define TPACPI_LED_NUMLEDS 8
4741 static struct tpacpi_led_classdev *tpacpi_leds;
4742 static enum led_status_t tpacpi_led_state_cache[TPACPI_LED_NUMLEDS];
4743 static const char * const tpacpi_led_names[TPACPI_LED_NUMLEDS] = {
4744 /* there's a limit of 19 chars + NULL before 2.6.26 */
4745 "tpacpi::power",
4746 "tpacpi:orange:batt",
4747 "tpacpi:green:batt",
4748 "tpacpi::dock_active",
4749 "tpacpi::bay_active",
4750 "tpacpi::dock_batt",
4751 "tpacpi::unknown_led",
4752 "tpacpi::standby",
4753 };
4754 #define TPACPI_SAFE_LEDS 0x0081U
4755
4756 static inline bool tpacpi_is_led_restricted(const unsigned int led)
4757 {
4758 #ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS
4759 return false;
4760 #else
4761 return (TPACPI_SAFE_LEDS & (1 << led)) == 0;
4762 #endif
4763 }
4764
4765 static int led_get_status(const unsigned int led)
4766 {
4767 int status;
4768 enum led_status_t led_s;
4769
4770 switch (led_supported) {
4771 case TPACPI_LED_570:
4772 if (!acpi_evalf(ec_handle,
4773 &status, "GLED", "dd", 1 << led))
4774 return -EIO;
4775 led_s = (status == 0)?
4776 TPACPI_LED_OFF :
4777 ((status == 1)?
4778 TPACPI_LED_ON :
4779 TPACPI_LED_BLINK);
4780 tpacpi_led_state_cache[led] = led_s;
4781 return led_s;
4782 default:
4783 return -ENXIO;
4784 }
4785
4786 /* not reached */
4787 }
4788
4789 static int led_set_status(const unsigned int led,
4790 const enum led_status_t ledstatus)
4791 {
4792 /* off, on, blink. Index is led_status_t */
4793 static const unsigned int led_sled_arg1[] = { 0, 1, 3 };
4794 static const unsigned int led_led_arg1[] = { 0, 0x80, 0xc0 };
4795
4796 int rc = 0;
4797
4798 switch (led_supported) {
4799 case TPACPI_LED_570:
4800 /* 570 */
4801 if (unlikely(led > 7))
4802 return -EINVAL;
4803 if (unlikely(tpacpi_is_led_restricted(led)))
4804 return -EPERM;
4805 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
4806 (1 << led), led_sled_arg1[ledstatus]))
4807 rc = -EIO;
4808 break;
4809 case TPACPI_LED_OLD:
4810 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */
4811 if (unlikely(led > 7))
4812 return -EINVAL;
4813 if (unlikely(tpacpi_is_led_restricted(led)))
4814 return -EPERM;
4815 rc = ec_write(TPACPI_LED_EC_HLMS, (1 << led));
4816 if (rc >= 0)
4817 rc = ec_write(TPACPI_LED_EC_HLBL,
4818 (ledstatus == TPACPI_LED_BLINK) << led);
4819 if (rc >= 0)
4820 rc = ec_write(TPACPI_LED_EC_HLCL,
4821 (ledstatus != TPACPI_LED_OFF) << led);
4822 break;
4823 case TPACPI_LED_NEW:
4824 /* all others */
4825 if (unlikely(led >= TPACPI_LED_NUMLEDS))
4826 return -EINVAL;
4827 if (unlikely(tpacpi_is_led_restricted(led)))
4828 return -EPERM;
4829 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
4830 led, led_led_arg1[ledstatus]))
4831 rc = -EIO;
4832 break;
4833 default:
4834 rc = -ENXIO;
4835 }
4836
4837 if (!rc)
4838 tpacpi_led_state_cache[led] = ledstatus;
4839
4840 return rc;
4841 }
4842
4843 static void led_sysfs_set_status(unsigned int led,
4844 enum led_brightness brightness)
4845 {
4846 led_set_status(led,
4847 (brightness == LED_OFF) ?
4848 TPACPI_LED_OFF :
4849 (tpacpi_led_state_cache[led] == TPACPI_LED_BLINK) ?
4850 TPACPI_LED_BLINK : TPACPI_LED_ON);
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_sysfs_set_status(data->led, data->new_brightness);
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 data->new_brightness = brightness;
4869 queue_work(tpacpi_wq, &data->work);
4870 }
4871
4872 static int led_sysfs_blink_set(struct led_classdev *led_cdev,
4873 unsigned long *delay_on, unsigned long *delay_off)
4874 {
4875 struct tpacpi_led_classdev *data = container_of(led_cdev,
4876 struct tpacpi_led_classdev, led_classdev);
4877
4878 /* Can we choose the flash rate? */
4879 if (*delay_on == 0 && *delay_off == 0) {
4880 /* yes. set them to the hardware blink rate (1 Hz) */
4881 *delay_on = 500; /* ms */
4882 *delay_off = 500; /* ms */
4883 } else if ((*delay_on != 500) || (*delay_off != 500))
4884 return -EINVAL;
4885
4886 data->new_brightness = TPACPI_LED_BLINK;
4887 queue_work(tpacpi_wq, &data->work);
4888
4889 return 0;
4890 }
4891
4892 static enum led_brightness led_sysfs_get(struct led_classdev *led_cdev)
4893 {
4894 int rc;
4895
4896 struct tpacpi_led_classdev *data = container_of(led_cdev,
4897 struct tpacpi_led_classdev, led_classdev);
4898
4899 rc = led_get_status(data->led);
4900
4901 if (rc == TPACPI_LED_OFF || rc < 0)
4902 rc = LED_OFF; /* no error handling in led class :( */
4903 else
4904 rc = LED_FULL;
4905
4906 return rc;
4907 }
4908
4909 static void led_exit(void)
4910 {
4911 unsigned int i;
4912
4913 for (i = 0; i < TPACPI_LED_NUMLEDS; i++) {
4914 if (tpacpi_leds[i].led_classdev.name)
4915 led_classdev_unregister(&tpacpi_leds[i].led_classdev);
4916 }
4917
4918 kfree(tpacpi_leds);
4919 }
4920
4921 static int __init tpacpi_init_led(unsigned int led)
4922 {
4923 int rc;
4924
4925 tpacpi_leds[led].led = led;
4926
4927 tpacpi_leds[led].led_classdev.brightness_set = &led_sysfs_set;
4928 tpacpi_leds[led].led_classdev.blink_set = &led_sysfs_blink_set;
4929 if (led_supported == TPACPI_LED_570)
4930 tpacpi_leds[led].led_classdev.brightness_get =
4931 &led_sysfs_get;
4932
4933 tpacpi_leds[led].led_classdev.name = tpacpi_led_names[led];
4934
4935 INIT_WORK(&tpacpi_leds[led].work, led_set_status_worker);
4936
4937 rc = led_classdev_register(&tpacpi_pdev->dev,
4938 &tpacpi_leds[led].led_classdev);
4939 if (rc < 0)
4940 tpacpi_leds[led].led_classdev.name = NULL;
4941
4942 return rc;
4943 }
4944
4945 static int __init led_init(struct ibm_init_struct *iibm)
4946 {
4947 unsigned int i;
4948 int rc;
4949
4950 vdbg_printk(TPACPI_DBG_INIT, "initializing LED subdriver\n");
4951
4952 TPACPI_ACPIHANDLE_INIT(led);
4953
4954 if (!led_handle)
4955 /* led not supported on R30, R31 */
4956 led_supported = TPACPI_LED_NONE;
4957 else if (strlencmp(led_path, "SLED") == 0)
4958 /* 570 */
4959 led_supported = TPACPI_LED_570;
4960 else if (strlencmp(led_path, "SYSL") == 0)
4961 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
4962 led_supported = TPACPI_LED_OLD;
4963 else
4964 /* all others */
4965 led_supported = TPACPI_LED_NEW;
4966
4967 vdbg_printk(TPACPI_DBG_INIT, "LED commands are %s, mode %d\n",
4968 str_supported(led_supported), led_supported);
4969
4970 tpacpi_leds = kzalloc(sizeof(*tpacpi_leds) * TPACPI_LED_NUMLEDS,
4971 GFP_KERNEL);
4972 if (!tpacpi_leds) {
4973 printk(TPACPI_ERR "Out of memory for LED data\n");
4974 return -ENOMEM;
4975 }
4976
4977 for (i = 0; i < TPACPI_LED_NUMLEDS; i++) {
4978 if (!tpacpi_is_led_restricted(i)) {
4979 rc = tpacpi_init_led(i);
4980 if (rc < 0) {
4981 led_exit();
4982 return rc;
4983 }
4984 }
4985 }
4986
4987 #ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS
4988 if (led_supported != TPACPI_LED_NONE)
4989 printk(TPACPI_NOTICE
4990 "warning: userspace override of important "
4991 "firmware LEDs is enabled\n");
4992 #endif
4993 return (led_supported != TPACPI_LED_NONE)? 0 : 1;
4994 }
4995
4996 #define str_led_status(s) \
4997 ((s) == TPACPI_LED_OFF ? "off" : \
4998 ((s) == TPACPI_LED_ON ? "on" : "blinking"))
4999
5000 static int led_read(char *p)
5001 {
5002 int len = 0;
5003
5004 if (!led_supported) {
5005 len += sprintf(p + len, "status:\t\tnot supported\n");
5006 return len;
5007 }
5008 len += sprintf(p + len, "status:\t\tsupported\n");
5009
5010 if (led_supported == TPACPI_LED_570) {
5011 /* 570 */
5012 int i, status;
5013 for (i = 0; i < 8; i++) {
5014 status = led_get_status(i);
5015 if (status < 0)
5016 return -EIO;
5017 len += sprintf(p + len, "%d:\t\t%s\n",
5018 i, str_led_status(status));
5019 }
5020 }
5021
5022 len += sprintf(p + len, "commands:\t"
5023 "<led> on, <led> off, <led> blink (<led> is 0-7)\n");
5024
5025 return len;
5026 }
5027
5028 static int led_write(char *buf)
5029 {
5030 char *cmd;
5031 int led, rc;
5032 enum led_status_t s;
5033
5034 if (!led_supported)
5035 return -ENODEV;
5036
5037 while ((cmd = next_cmd(&buf))) {
5038 if (sscanf(cmd, "%d", &led) != 1 || led < 0 || led > 7)
5039 return -EINVAL;
5040
5041 if (strstr(cmd, "off")) {
5042 s = TPACPI_LED_OFF;
5043 } else if (strstr(cmd, "on")) {
5044 s = TPACPI_LED_ON;
5045 } else if (strstr(cmd, "blink")) {
5046 s = TPACPI_LED_BLINK;
5047 } else {
5048 return -EINVAL;
5049 }
5050
5051 rc = led_set_status(led, s);
5052 if (rc < 0)
5053 return rc;
5054 }
5055
5056 return 0;
5057 }
5058
5059 static struct ibm_struct led_driver_data = {
5060 .name = "led",
5061 .read = led_read,
5062 .write = led_write,
5063 .exit = led_exit,
5064 };
5065
5066 /*************************************************************************
5067 * Beep subdriver
5068 */
5069
5070 TPACPI_HANDLE(beep, ec, "BEEP"); /* all except R30, R31 */
5071
5072 static int __init beep_init(struct ibm_init_struct *iibm)
5073 {
5074 vdbg_printk(TPACPI_DBG_INIT, "initializing beep subdriver\n");
5075
5076 TPACPI_ACPIHANDLE_INIT(beep);
5077
5078 vdbg_printk(TPACPI_DBG_INIT, "beep is %s\n",
5079 str_supported(beep_handle != NULL));
5080
5081 return (beep_handle)? 0 : 1;
5082 }
5083
5084 static int beep_read(char *p)
5085 {
5086 int len = 0;
5087
5088 if (!beep_handle)
5089 len += sprintf(p + len, "status:\t\tnot supported\n");
5090 else {
5091 len += sprintf(p + len, "status:\t\tsupported\n");
5092 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-17)\n");
5093 }
5094
5095 return len;
5096 }
5097
5098 static int beep_write(char *buf)
5099 {
5100 char *cmd;
5101 int beep_cmd;
5102
5103 if (!beep_handle)
5104 return -ENODEV;
5105
5106 while ((cmd = next_cmd(&buf))) {
5107 if (sscanf(cmd, "%u", &beep_cmd) == 1 &&
5108 beep_cmd >= 0 && beep_cmd <= 17) {
5109 /* beep_cmd set */
5110 } else
5111 return -EINVAL;
5112 if (!acpi_evalf(beep_handle, NULL, NULL, "vdd", beep_cmd, 0))
5113 return -EIO;
5114 }
5115
5116 return 0;
5117 }
5118
5119 static struct ibm_struct beep_driver_data = {
5120 .name = "beep",
5121 .read = beep_read,
5122 .write = beep_write,
5123 };
5124
5125 /*************************************************************************
5126 * Thermal subdriver
5127 */
5128
5129 enum thermal_access_mode {
5130 TPACPI_THERMAL_NONE = 0, /* No thermal support */
5131 TPACPI_THERMAL_ACPI_TMP07, /* Use ACPI TMP0-7 */
5132 TPACPI_THERMAL_ACPI_UPDT, /* Use ACPI TMP0-7 with UPDT */
5133 TPACPI_THERMAL_TPEC_8, /* Use ACPI EC regs, 8 sensors */
5134 TPACPI_THERMAL_TPEC_16, /* Use ACPI EC regs, 16 sensors */
5135 };
5136
5137 enum { /* TPACPI_THERMAL_TPEC_* */
5138 TP_EC_THERMAL_TMP0 = 0x78, /* ACPI EC regs TMP 0..7 */
5139 TP_EC_THERMAL_TMP8 = 0xC0, /* ACPI EC regs TMP 8..15 */
5140 TP_EC_THERMAL_TMP_NA = -128, /* ACPI EC sensor not available */
5141 };
5142
5143 #define TPACPI_MAX_THERMAL_SENSORS 16 /* Max thermal sensors supported */
5144 struct ibm_thermal_sensors_struct {
5145 s32 temp[TPACPI_MAX_THERMAL_SENSORS];
5146 };
5147
5148 static enum thermal_access_mode thermal_read_mode;
5149
5150 /* idx is zero-based */
5151 static int thermal_get_sensor(int idx, s32 *value)
5152 {
5153 int t;
5154 s8 tmp;
5155 char tmpi[5];
5156
5157 t = TP_EC_THERMAL_TMP0;
5158
5159 switch (thermal_read_mode) {
5160 #if TPACPI_MAX_THERMAL_SENSORS >= 16
5161 case TPACPI_THERMAL_TPEC_16:
5162 if (idx >= 8 && idx <= 15) {
5163 t = TP_EC_THERMAL_TMP8;
5164 idx -= 8;
5165 }
5166 /* fallthrough */
5167 #endif
5168 case TPACPI_THERMAL_TPEC_8:
5169 if (idx <= 7) {
5170 if (!acpi_ec_read(t + idx, &tmp))
5171 return -EIO;
5172 *value = tmp * 1000;
5173 return 0;
5174 }
5175 break;
5176
5177 case TPACPI_THERMAL_ACPI_UPDT:
5178 if (idx <= 7) {
5179 snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
5180 if (!acpi_evalf(ec_handle, NULL, "UPDT", "v"))
5181 return -EIO;
5182 if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
5183 return -EIO;
5184 *value = (t - 2732) * 100;
5185 return 0;
5186 }
5187 break;
5188
5189 case TPACPI_THERMAL_ACPI_TMP07:
5190 if (idx <= 7) {
5191 snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
5192 if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
5193 return -EIO;
5194 if (t > 127 || t < -127)
5195 t = TP_EC_THERMAL_TMP_NA;
5196 *value = t * 1000;
5197 return 0;
5198 }
5199 break;
5200
5201 case TPACPI_THERMAL_NONE:
5202 default:
5203 return -ENOSYS;
5204 }
5205
5206 return -EINVAL;
5207 }
5208
5209 static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s)
5210 {
5211 int res, i;
5212 int n;
5213
5214 n = 8;
5215 i = 0;
5216
5217 if (!s)
5218 return -EINVAL;
5219
5220 if (thermal_read_mode == TPACPI_THERMAL_TPEC_16)
5221 n = 16;
5222
5223 for (i = 0 ; i < n; i++) {
5224 res = thermal_get_sensor(i, &s->temp[i]);
5225 if (res)
5226 return res;
5227 }
5228
5229 return n;
5230 }
5231
5232 /* sysfs temp##_input -------------------------------------------------- */
5233
5234 static ssize_t thermal_temp_input_show(struct device *dev,
5235 struct device_attribute *attr,
5236 char *buf)
5237 {
5238 struct sensor_device_attribute *sensor_attr =
5239 to_sensor_dev_attr(attr);
5240 int idx = sensor_attr->index;
5241 s32 value;
5242 int res;
5243
5244 res = thermal_get_sensor(idx, &value);
5245 if (res)
5246 return res;
5247 if (value == TP_EC_THERMAL_TMP_NA * 1000)
5248 return -ENXIO;
5249
5250 return snprintf(buf, PAGE_SIZE, "%d\n", value);
5251 }
5252
5253 #define THERMAL_SENSOR_ATTR_TEMP(_idxA, _idxB) \
5254 SENSOR_ATTR(temp##_idxA##_input, S_IRUGO, \
5255 thermal_temp_input_show, NULL, _idxB)
5256
5257 static struct sensor_device_attribute sensor_dev_attr_thermal_temp_input[] = {
5258 THERMAL_SENSOR_ATTR_TEMP(1, 0),
5259 THERMAL_SENSOR_ATTR_TEMP(2, 1),
5260 THERMAL_SENSOR_ATTR_TEMP(3, 2),
5261 THERMAL_SENSOR_ATTR_TEMP(4, 3),
5262 THERMAL_SENSOR_ATTR_TEMP(5, 4),
5263 THERMAL_SENSOR_ATTR_TEMP(6, 5),
5264 THERMAL_SENSOR_ATTR_TEMP(7, 6),
5265 THERMAL_SENSOR_ATTR_TEMP(8, 7),
5266 THERMAL_SENSOR_ATTR_TEMP(9, 8),
5267 THERMAL_SENSOR_ATTR_TEMP(10, 9),
5268 THERMAL_SENSOR_ATTR_TEMP(11, 10),
5269 THERMAL_SENSOR_ATTR_TEMP(12, 11),
5270 THERMAL_SENSOR_ATTR_TEMP(13, 12),
5271 THERMAL_SENSOR_ATTR_TEMP(14, 13),
5272 THERMAL_SENSOR_ATTR_TEMP(15, 14),
5273 THERMAL_SENSOR_ATTR_TEMP(16, 15),
5274 };
5275
5276 #define THERMAL_ATTRS(X) \
5277 &sensor_dev_attr_thermal_temp_input[X].dev_attr.attr
5278
5279 static struct attribute *thermal_temp_input_attr[] = {
5280 THERMAL_ATTRS(8),
5281 THERMAL_ATTRS(9),
5282 THERMAL_ATTRS(10),
5283 THERMAL_ATTRS(11),
5284 THERMAL_ATTRS(12),
5285 THERMAL_ATTRS(13),
5286 THERMAL_ATTRS(14),
5287 THERMAL_ATTRS(15),
5288 THERMAL_ATTRS(0),
5289 THERMAL_ATTRS(1),
5290 THERMAL_ATTRS(2),
5291 THERMAL_ATTRS(3),
5292 THERMAL_ATTRS(4),
5293 THERMAL_ATTRS(5),
5294 THERMAL_ATTRS(6),
5295 THERMAL_ATTRS(7),
5296 NULL
5297 };
5298
5299 static const struct attribute_group thermal_temp_input16_group = {
5300 .attrs = thermal_temp_input_attr
5301 };
5302
5303 static const struct attribute_group thermal_temp_input8_group = {
5304 .attrs = &thermal_temp_input_attr[8]
5305 };
5306
5307 #undef THERMAL_SENSOR_ATTR_TEMP
5308 #undef THERMAL_ATTRS
5309
5310 /* --------------------------------------------------------------------- */
5311
5312 static int __init thermal_init(struct ibm_init_struct *iibm)
5313 {
5314 u8 t, ta1, ta2;
5315 int i;
5316 int acpi_tmp7;
5317 int res;
5318
5319 vdbg_printk(TPACPI_DBG_INIT, "initializing thermal subdriver\n");
5320
5321 acpi_tmp7 = acpi_evalf(ec_handle, NULL, "TMP7", "qv");
5322
5323 if (thinkpad_id.ec_model) {
5324 /*
5325 * Direct EC access mode: sensors at registers
5326 * 0x78-0x7F, 0xC0-0xC7. Registers return 0x00 for
5327 * non-implemented, thermal sensors return 0x80 when
5328 * not available
5329 */
5330
5331 ta1 = ta2 = 0;
5332 for (i = 0; i < 8; i++) {
5333 if (acpi_ec_read(TP_EC_THERMAL_TMP0 + i, &t)) {
5334 ta1 |= t;
5335 } else {
5336 ta1 = 0;
5337 break;
5338 }
5339 if (acpi_ec_read(TP_EC_THERMAL_TMP8 + i, &t)) {
5340 ta2 |= t;
5341 } else {
5342 ta1 = 0;
5343 break;
5344 }
5345 }
5346 if (ta1 == 0) {
5347 /* This is sheer paranoia, but we handle it anyway */
5348 if (acpi_tmp7) {
5349 printk(TPACPI_ERR
5350 "ThinkPad ACPI EC access misbehaving, "
5351 "falling back to ACPI TMPx access "
5352 "mode\n");
5353 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
5354 } else {
5355 printk(TPACPI_ERR
5356 "ThinkPad ACPI EC access misbehaving, "
5357 "disabling thermal sensors access\n");
5358 thermal_read_mode = TPACPI_THERMAL_NONE;
5359 }
5360 } else {
5361 thermal_read_mode =
5362 (ta2 != 0) ?
5363 TPACPI_THERMAL_TPEC_16 : TPACPI_THERMAL_TPEC_8;
5364 }
5365 } else if (acpi_tmp7) {
5366 if (acpi_evalf(ec_handle, NULL, "UPDT", "qv")) {
5367 /* 600e/x, 770e, 770x */
5368 thermal_read_mode = TPACPI_THERMAL_ACPI_UPDT;
5369 } else {
5370 /* Standard ACPI TMPx access, max 8 sensors */
5371 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
5372 }
5373 } else {
5374 /* temperatures not supported on 570, G4x, R30, R31, R32 */
5375 thermal_read_mode = TPACPI_THERMAL_NONE;
5376 }
5377
5378 vdbg_printk(TPACPI_DBG_INIT, "thermal is %s, mode %d\n",
5379 str_supported(thermal_read_mode != TPACPI_THERMAL_NONE),
5380 thermal_read_mode);
5381
5382 switch (thermal_read_mode) {
5383 case TPACPI_THERMAL_TPEC_16:
5384 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
5385 &thermal_temp_input16_group);
5386 if (res)
5387 return res;
5388 break;
5389 case TPACPI_THERMAL_TPEC_8:
5390 case TPACPI_THERMAL_ACPI_TMP07:
5391 case TPACPI_THERMAL_ACPI_UPDT:
5392 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
5393 &thermal_temp_input8_group);
5394 if (res)
5395 return res;
5396 break;
5397 case TPACPI_THERMAL_NONE:
5398 default:
5399 return 1;
5400 }
5401
5402 return 0;
5403 }
5404
5405 static void thermal_exit(void)
5406 {
5407 switch (thermal_read_mode) {
5408 case TPACPI_THERMAL_TPEC_16:
5409 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
5410 &thermal_temp_input16_group);
5411 break;
5412 case TPACPI_THERMAL_TPEC_8:
5413 case TPACPI_THERMAL_ACPI_TMP07:
5414 case TPACPI_THERMAL_ACPI_UPDT:
5415 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
5416 &thermal_temp_input16_group);
5417 break;
5418 case TPACPI_THERMAL_NONE:
5419 default:
5420 break;
5421 }
5422 }
5423
5424 static int thermal_read(char *p)
5425 {
5426 int len = 0;
5427 int n, i;
5428 struct ibm_thermal_sensors_struct t;
5429
5430 n = thermal_get_sensors(&t);
5431 if (unlikely(n < 0))
5432 return n;
5433
5434 len += sprintf(p + len, "temperatures:\t");
5435
5436 if (n > 0) {
5437 for (i = 0; i < (n - 1); i++)
5438 len += sprintf(p + len, "%d ", t.temp[i] / 1000);
5439 len += sprintf(p + len, "%d\n", t.temp[i] / 1000);
5440 } else
5441 len += sprintf(p + len, "not supported\n");
5442
5443 return len;
5444 }
5445
5446 static struct ibm_struct thermal_driver_data = {
5447 .name = "thermal",
5448 .read = thermal_read,
5449 .exit = thermal_exit,
5450 };
5451
5452 /*************************************************************************
5453 * EC Dump subdriver
5454 */
5455
5456 static u8 ecdump_regs[256];
5457
5458 static int ecdump_read(char *p)
5459 {
5460 int len = 0;
5461 int i, j;
5462 u8 v;
5463
5464 len += sprintf(p + len, "EC "
5465 " +00 +01 +02 +03 +04 +05 +06 +07"
5466 " +08 +09 +0a +0b +0c +0d +0e +0f\n");
5467 for (i = 0; i < 256; i += 16) {
5468 len += sprintf(p + len, "EC 0x%02x:", i);
5469 for (j = 0; j < 16; j++) {
5470 if (!acpi_ec_read(i + j, &v))
5471 break;
5472 if (v != ecdump_regs[i + j])
5473 len += sprintf(p + len, " *%02x", v);
5474 else
5475 len += sprintf(p + len, " %02x", v);
5476 ecdump_regs[i + j] = v;
5477 }
5478 len += sprintf(p + len, "\n");
5479 if (j != 16)
5480 break;
5481 }
5482
5483 /* These are way too dangerous to advertise openly... */
5484 #if 0
5485 len += sprintf(p + len, "commands:\t0x<offset> 0x<value>"
5486 " (<offset> is 00-ff, <value> is 00-ff)\n");
5487 len += sprintf(p + len, "commands:\t0x<offset> <value> "
5488 " (<offset> is 00-ff, <value> is 0-255)\n");
5489 #endif
5490 return len;
5491 }
5492
5493 static int ecdump_write(char *buf)
5494 {
5495 char *cmd;
5496 int i, v;
5497
5498 while ((cmd = next_cmd(&buf))) {
5499 if (sscanf(cmd, "0x%x 0x%x", &i, &v) == 2) {
5500 /* i and v set */
5501 } else if (sscanf(cmd, "0x%x %u", &i, &v) == 2) {
5502 /* i and v set */
5503 } else
5504 return -EINVAL;
5505 if (i >= 0 && i < 256 && v >= 0 && v < 256) {
5506 if (!acpi_ec_write(i, v))
5507 return -EIO;
5508 } else
5509 return -EINVAL;
5510 }
5511
5512 return 0;
5513 }
5514
5515 static struct ibm_struct ecdump_driver_data = {
5516 .name = "ecdump",
5517 .read = ecdump_read,
5518 .write = ecdump_write,
5519 .flags.experimental = 1,
5520 };
5521
5522 /*************************************************************************
5523 * Backlight/brightness subdriver
5524 */
5525
5526 #define TPACPI_BACKLIGHT_DEV_NAME "thinkpad_screen"
5527
5528 enum {
5529 TP_EC_BACKLIGHT = 0x31,
5530
5531 /* TP_EC_BACKLIGHT bitmasks */
5532 TP_EC_BACKLIGHT_LVLMSK = 0x1F,
5533 TP_EC_BACKLIGHT_CMDMSK = 0xE0,
5534 TP_EC_BACKLIGHT_MAPSW = 0x20,
5535 };
5536
5537 static struct backlight_device *ibm_backlight_device;
5538 static int brightness_mode;
5539 static unsigned int brightness_enable = 2; /* 2 = auto, 0 = no, 1 = yes */
5540
5541 static struct mutex brightness_mutex;
5542
5543 /*
5544 * ThinkPads can read brightness from two places: EC 0x31, or
5545 * CMOS NVRAM byte 0x5E, bits 0-3.
5546 *
5547 * EC 0x31 has the following layout
5548 * Bit 7: unknown function
5549 * Bit 6: unknown function
5550 * Bit 5: Z: honour scale changes, NZ: ignore scale changes
5551 * Bit 4: must be set to zero to avoid problems
5552 * Bit 3-0: backlight brightness level
5553 *
5554 * brightness_get_raw returns status data in the EC 0x31 layout
5555 */
5556 static int brightness_get_raw(int *status)
5557 {
5558 u8 lec = 0, lcmos = 0, level = 0;
5559
5560 if (brightness_mode & 1) {
5561 if (!acpi_ec_read(TP_EC_BACKLIGHT, &lec))
5562 return -EIO;
5563 level = lec & TP_EC_BACKLIGHT_LVLMSK;
5564 };
5565 if (brightness_mode & 2) {
5566 lcmos = (nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS)
5567 & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
5568 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
5569 lcmos &= (tp_features.bright_16levels)? 0x0f : 0x07;
5570 level = lcmos;
5571 }
5572
5573 if (brightness_mode == 3) {
5574 *status = lec; /* Prefer EC, CMOS is just a backing store */
5575 lec &= TP_EC_BACKLIGHT_LVLMSK;
5576 if (lec == lcmos)
5577 tp_warned.bright_cmos_ec_unsync = 0;
5578 else {
5579 if (!tp_warned.bright_cmos_ec_unsync) {
5580 printk(TPACPI_ERR
5581 "CMOS NVRAM (%u) and EC (%u) do not "
5582 "agree on display brightness level\n",
5583 (unsigned int) lcmos,
5584 (unsigned int) lec);
5585 tp_warned.bright_cmos_ec_unsync = 1;
5586 }
5587 return -EIO;
5588 }
5589 } else {
5590 *status = level;
5591 }
5592
5593 return 0;
5594 }
5595
5596 /* May return EINTR which can always be mapped to ERESTARTSYS */
5597 static int brightness_set(int value)
5598 {
5599 int cmos_cmd, inc, i, res;
5600 int current_value;
5601 int command_bits;
5602
5603 if (value > ((tp_features.bright_16levels)? 15 : 7) ||
5604 value < 0)
5605 return -EINVAL;
5606
5607 res = mutex_lock_killable(&brightness_mutex);
5608 if (res < 0)
5609 return res;
5610
5611 res = brightness_get_raw(&current_value);
5612 if (res < 0)
5613 goto errout;
5614
5615 command_bits = current_value & TP_EC_BACKLIGHT_CMDMSK;
5616 current_value &= TP_EC_BACKLIGHT_LVLMSK;
5617
5618 cmos_cmd = value > current_value ?
5619 TP_CMOS_BRIGHTNESS_UP :
5620 TP_CMOS_BRIGHTNESS_DOWN;
5621 inc = (value > current_value)? 1 : -1;
5622
5623 res = 0;
5624 for (i = current_value; i != value; i += inc) {
5625 if ((brightness_mode & 2) &&
5626 issue_thinkpad_cmos_command(cmos_cmd)) {
5627 res = -EIO;
5628 goto errout;
5629 }
5630 if ((brightness_mode & 1) &&
5631 !acpi_ec_write(TP_EC_BACKLIGHT,
5632 (i + inc) | command_bits)) {
5633 res = -EIO;
5634 goto errout;;
5635 }
5636 }
5637
5638 errout:
5639 mutex_unlock(&brightness_mutex);
5640 return res;
5641 }
5642
5643 /* sysfs backlight class ----------------------------------------------- */
5644
5645 static int brightness_update_status(struct backlight_device *bd)
5646 {
5647 /* it is the backlight class's job (caller) to handle
5648 * EINTR and other errors properly */
5649 return brightness_set(
5650 (bd->props.fb_blank == FB_BLANK_UNBLANK &&
5651 bd->props.power == FB_BLANK_UNBLANK) ?
5652 bd->props.brightness : 0);
5653 }
5654
5655 static int brightness_get(struct backlight_device *bd)
5656 {
5657 int status, res;
5658
5659 res = brightness_get_raw(&status);
5660 if (res < 0)
5661 return 0; /* FIXME: teach backlight about error handling */
5662
5663 return status & TP_EC_BACKLIGHT_LVLMSK;
5664 }
5665
5666 static struct backlight_ops ibm_backlight_data = {
5667 .get_brightness = brightness_get,
5668 .update_status = brightness_update_status,
5669 };
5670
5671 /* --------------------------------------------------------------------- */
5672
5673 static int __init brightness_init(struct ibm_init_struct *iibm)
5674 {
5675 int b;
5676
5677 vdbg_printk(TPACPI_DBG_INIT, "initializing brightness subdriver\n");
5678
5679 mutex_init(&brightness_mutex);
5680
5681 /*
5682 * We always attempt to detect acpi support, so as to switch
5683 * Lenovo Vista BIOS to ACPI brightness mode even if we are not
5684 * going to publish a backlight interface
5685 */
5686 b = tpacpi_check_std_acpi_brightness_support();
5687 if (b > 0) {
5688
5689 if (acpi_video_backlight_support()) {
5690 if (brightness_enable > 1) {
5691 printk(TPACPI_NOTICE
5692 "Standard ACPI backlight interface "
5693 "available, not loading native one.\n");
5694 return 1;
5695 } else if (brightness_enable == 1) {
5696 printk(TPACPI_NOTICE
5697 "Backlight control force enabled, even if standard "
5698 "ACPI backlight interface is available\n");
5699 }
5700 } else {
5701 if (brightness_enable > 1) {
5702 printk(TPACPI_NOTICE
5703 "Standard ACPI backlight interface not "
5704 "available, thinkpad_acpi native "
5705 "brightness control enabled\n");
5706 }
5707 }
5708 }
5709
5710 if (!brightness_enable) {
5711 dbg_printk(TPACPI_DBG_INIT,
5712 "brightness support disabled by "
5713 "module parameter\n");
5714 return 1;
5715 }
5716
5717 if (b > 16) {
5718 printk(TPACPI_ERR
5719 "Unsupported brightness interface, "
5720 "please contact %s\n", TPACPI_MAIL);
5721 return 1;
5722 }
5723 if (b == 16)
5724 tp_features.bright_16levels = 1;
5725
5726 if (!brightness_mode) {
5727 if (thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO)
5728 brightness_mode = 2;
5729 else
5730 brightness_mode = 3;
5731
5732 dbg_printk(TPACPI_DBG_INIT, "selected brightness_mode=%d\n",
5733 brightness_mode);
5734 }
5735
5736 if (brightness_mode > 3)
5737 return -EINVAL;
5738
5739 if (brightness_get_raw(&b) < 0)
5740 return 1;
5741
5742 if (tp_features.bright_16levels)
5743 printk(TPACPI_INFO
5744 "detected a 16-level brightness capable ThinkPad\n");
5745
5746 ibm_backlight_device = backlight_device_register(
5747 TPACPI_BACKLIGHT_DEV_NAME, NULL, NULL,
5748 &ibm_backlight_data);
5749 if (IS_ERR(ibm_backlight_device)) {
5750 printk(TPACPI_ERR "Could not register backlight device\n");
5751 return PTR_ERR(ibm_backlight_device);
5752 }
5753 vdbg_printk(TPACPI_DBG_INIT, "brightness is supported\n");
5754
5755 ibm_backlight_device->props.max_brightness =
5756 (tp_features.bright_16levels)? 15 : 7;
5757 ibm_backlight_device->props.brightness = b & TP_EC_BACKLIGHT_LVLMSK;
5758 backlight_update_status(ibm_backlight_device);
5759
5760 return 0;
5761 }
5762
5763 static void brightness_exit(void)
5764 {
5765 if (ibm_backlight_device) {
5766 vdbg_printk(TPACPI_DBG_EXIT,
5767 "calling backlight_device_unregister()\n");
5768 backlight_device_unregister(ibm_backlight_device);
5769 }
5770 }
5771
5772 static int brightness_read(char *p)
5773 {
5774 int len = 0;
5775 int level;
5776
5777 level = brightness_get(NULL);
5778 if (level < 0) {
5779 len += sprintf(p + len, "level:\t\tunreadable\n");
5780 } else {
5781 len += sprintf(p + len, "level:\t\t%d\n", level);
5782 len += sprintf(p + len, "commands:\tup, down\n");
5783 len += sprintf(p + len, "commands:\tlevel <level>"
5784 " (<level> is 0-%d)\n",
5785 (tp_features.bright_16levels) ? 15 : 7);
5786 }
5787
5788 return len;
5789 }
5790
5791 static int brightness_write(char *buf)
5792 {
5793 int level;
5794 int rc;
5795 char *cmd;
5796 int max_level = (tp_features.bright_16levels) ? 15 : 7;
5797
5798 level = brightness_get(NULL);
5799 if (level < 0)
5800 return level;
5801
5802 while ((cmd = next_cmd(&buf))) {
5803 if (strlencmp(cmd, "up") == 0) {
5804 if (level < max_level)
5805 level++;
5806 } else if (strlencmp(cmd, "down") == 0) {
5807 if (level > 0)
5808 level--;
5809 } else if (sscanf(cmd, "level %d", &level) == 1 &&
5810 level >= 0 && level <= max_level) {
5811 /* new level set */
5812 } else
5813 return -EINVAL;
5814 }
5815
5816 /*
5817 * Now we know what the final level should be, so we try to set it.
5818 * Doing it this way makes the syscall restartable in case of EINTR
5819 */
5820 rc = brightness_set(level);
5821 return (rc == -EINTR)? ERESTARTSYS : rc;
5822 }
5823
5824 static struct ibm_struct brightness_driver_data = {
5825 .name = "brightness",
5826 .read = brightness_read,
5827 .write = brightness_write,
5828 .exit = brightness_exit,
5829 };
5830
5831 /*************************************************************************
5832 * Volume subdriver
5833 */
5834
5835 static int volume_offset = 0x30;
5836
5837 static int volume_read(char *p)
5838 {
5839 int len = 0;
5840 u8 level;
5841
5842 if (!acpi_ec_read(volume_offset, &level)) {
5843 len += sprintf(p + len, "level:\t\tunreadable\n");
5844 } else {
5845 len += sprintf(p + len, "level:\t\t%d\n", level & 0xf);
5846 len += sprintf(p + len, "mute:\t\t%s\n", onoff(level, 6));
5847 len += sprintf(p + len, "commands:\tup, down, mute\n");
5848 len += sprintf(p + len, "commands:\tlevel <level>"
5849 " (<level> is 0-15)\n");
5850 }
5851
5852 return len;
5853 }
5854
5855 static int volume_write(char *buf)
5856 {
5857 int cmos_cmd, inc, i;
5858 u8 level, mute;
5859 int new_level, new_mute;
5860 char *cmd;
5861
5862 while ((cmd = next_cmd(&buf))) {
5863 if (!acpi_ec_read(volume_offset, &level))
5864 return -EIO;
5865 new_mute = mute = level & 0x40;
5866 new_level = level = level & 0xf;
5867
5868 if (strlencmp(cmd, "up") == 0) {
5869 if (mute)
5870 new_mute = 0;
5871 else
5872 new_level = level == 15 ? 15 : level + 1;
5873 } else if (strlencmp(cmd, "down") == 0) {
5874 if (mute)
5875 new_mute = 0;
5876 else
5877 new_level = level == 0 ? 0 : level - 1;
5878 } else if (sscanf(cmd, "level %d", &new_level) == 1 &&
5879 new_level >= 0 && new_level <= 15) {
5880 /* new_level set */
5881 } else if (strlencmp(cmd, "mute") == 0) {
5882 new_mute = 0x40;
5883 } else
5884 return -EINVAL;
5885
5886 if (new_level != level) {
5887 /* mute doesn't change */
5888
5889 cmos_cmd = (new_level > level) ?
5890 TP_CMOS_VOLUME_UP : TP_CMOS_VOLUME_DOWN;
5891 inc = new_level > level ? 1 : -1;
5892
5893 if (mute && (issue_thinkpad_cmos_command(cmos_cmd) ||
5894 !acpi_ec_write(volume_offset, level)))
5895 return -EIO;
5896
5897 for (i = level; i != new_level; i += inc)
5898 if (issue_thinkpad_cmos_command(cmos_cmd) ||
5899 !acpi_ec_write(volume_offset, i + inc))
5900 return -EIO;
5901
5902 if (mute &&
5903 (issue_thinkpad_cmos_command(TP_CMOS_VOLUME_MUTE) ||
5904 !acpi_ec_write(volume_offset, new_level + mute))) {
5905 return -EIO;
5906 }
5907 }
5908
5909 if (new_mute != mute) {
5910 /* level doesn't change */
5911
5912 cmos_cmd = (new_mute) ?
5913 TP_CMOS_VOLUME_MUTE : TP_CMOS_VOLUME_UP;
5914
5915 if (issue_thinkpad_cmos_command(cmos_cmd) ||
5916 !acpi_ec_write(volume_offset, level + new_mute))
5917 return -EIO;
5918 }
5919 }
5920
5921 return 0;
5922 }
5923
5924 static struct ibm_struct volume_driver_data = {
5925 .name = "volume",
5926 .read = volume_read,
5927 .write = volume_write,
5928 };
5929
5930 /*************************************************************************
5931 * Fan subdriver
5932 */
5933
5934 /*
5935 * FAN ACCESS MODES
5936 *
5937 * TPACPI_FAN_RD_ACPI_GFAN:
5938 * ACPI GFAN method: returns fan level
5939 *
5940 * see TPACPI_FAN_WR_ACPI_SFAN
5941 * EC 0x2f (HFSP) not available if GFAN exists
5942 *
5943 * TPACPI_FAN_WR_ACPI_SFAN:
5944 * ACPI SFAN method: sets fan level, 0 (stop) to 7 (max)
5945 *
5946 * EC 0x2f (HFSP) might be available *for reading*, but do not use
5947 * it for writing.
5948 *
5949 * TPACPI_FAN_WR_TPEC:
5950 * ThinkPad EC register 0x2f (HFSP): fan control loop mode
5951 * Supported on almost all ThinkPads
5952 *
5953 * Fan speed changes of any sort (including those caused by the
5954 * disengaged mode) are usually done slowly by the firmware as the
5955 * maximum ammount of fan duty cycle change per second seems to be
5956 * limited.
5957 *
5958 * Reading is not available if GFAN exists.
5959 * Writing is not available if SFAN exists.
5960 *
5961 * Bits
5962 * 7 automatic mode engaged;
5963 * (default operation mode of the ThinkPad)
5964 * fan level is ignored in this mode.
5965 * 6 full speed mode (takes precedence over bit 7);
5966 * not available on all thinkpads. May disable
5967 * the tachometer while the fan controller ramps up
5968 * the speed (which can take up to a few *minutes*).
5969 * Speeds up fan to 100% duty-cycle, which is far above
5970 * the standard RPM levels. It is not impossible that
5971 * it could cause hardware damage.
5972 * 5-3 unused in some models. Extra bits for fan level
5973 * in others, but still useless as all values above
5974 * 7 map to the same speed as level 7 in these models.
5975 * 2-0 fan level (0..7 usually)
5976 * 0x00 = stop
5977 * 0x07 = max (set when temperatures critical)
5978 * Some ThinkPads may have other levels, see
5979 * TPACPI_FAN_WR_ACPI_FANS (X31/X40/X41)
5980 *
5981 * FIRMWARE BUG: on some models, EC 0x2f might not be initialized at
5982 * boot. Apparently the EC does not intialize it, so unless ACPI DSDT
5983 * does so, its initial value is meaningless (0x07).
5984 *
5985 * For firmware bugs, refer to:
5986 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
5987 *
5988 * ----
5989 *
5990 * ThinkPad EC register 0x84 (LSB), 0x85 (MSB):
5991 * Main fan tachometer reading (in RPM)
5992 *
5993 * This register is present on all ThinkPads with a new-style EC, and
5994 * it is known not to be present on the A21m/e, and T22, as there is
5995 * something else in offset 0x84 according to the ACPI DSDT. Other
5996 * ThinkPads from this same time period (and earlier) probably lack the
5997 * tachometer as well.
5998 *
5999 * Unfortunately a lot of ThinkPads with new-style ECs but whose firwmare
6000 * was never fixed by IBM to report the EC firmware version string
6001 * probably support the tachometer (like the early X models), so
6002 * detecting it is quite hard. We need more data to know for sure.
6003 *
6004 * FIRMWARE BUG: always read 0x84 first, otherwise incorrect readings
6005 * might result.
6006 *
6007 * FIRMWARE BUG: may go stale while the EC is switching to full speed
6008 * mode.
6009 *
6010 * For firmware bugs, refer to:
6011 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
6012 *
6013 * TPACPI_FAN_WR_ACPI_FANS:
6014 * ThinkPad X31, X40, X41. Not available in the X60.
6015 *
6016 * FANS ACPI handle: takes three arguments: low speed, medium speed,
6017 * high speed. ACPI DSDT seems to map these three speeds to levels
6018 * as follows: STOP LOW LOW MED MED HIGH HIGH HIGH HIGH
6019 * (this map is stored on FAN0..FAN8 as "0,1,1,2,2,3,3,3,3")
6020 *
6021 * The speeds are stored on handles
6022 * (FANA:FAN9), (FANC:FANB), (FANE:FAND).
6023 *
6024 * There are three default speed sets, acessible as handles:
6025 * FS1L,FS1M,FS1H; FS2L,FS2M,FS2H; FS3L,FS3M,FS3H
6026 *
6027 * ACPI DSDT switches which set is in use depending on various
6028 * factors.
6029 *
6030 * TPACPI_FAN_WR_TPEC is also available and should be used to
6031 * command the fan. The X31/X40/X41 seems to have 8 fan levels,
6032 * but the ACPI tables just mention level 7.
6033 */
6034
6035 enum { /* Fan control constants */
6036 fan_status_offset = 0x2f, /* EC register 0x2f */
6037 fan_rpm_offset = 0x84, /* EC register 0x84: LSB, 0x85 MSB (RPM)
6038 * 0x84 must be read before 0x85 */
6039
6040 TP_EC_FAN_FULLSPEED = 0x40, /* EC fan mode: full speed */
6041 TP_EC_FAN_AUTO = 0x80, /* EC fan mode: auto fan control */
6042
6043 TPACPI_FAN_LAST_LEVEL = 0x100, /* Use cached last-seen fan level */
6044 };
6045
6046 enum fan_status_access_mode {
6047 TPACPI_FAN_NONE = 0, /* No fan status or control */
6048 TPACPI_FAN_RD_ACPI_GFAN, /* Use ACPI GFAN */
6049 TPACPI_FAN_RD_TPEC, /* Use ACPI EC regs 0x2f, 0x84-0x85 */
6050 };
6051
6052 enum fan_control_access_mode {
6053 TPACPI_FAN_WR_NONE = 0, /* No fan control */
6054 TPACPI_FAN_WR_ACPI_SFAN, /* Use ACPI SFAN */
6055 TPACPI_FAN_WR_TPEC, /* Use ACPI EC reg 0x2f */
6056 TPACPI_FAN_WR_ACPI_FANS, /* Use ACPI FANS and EC reg 0x2f */
6057 };
6058
6059 enum fan_control_commands {
6060 TPACPI_FAN_CMD_SPEED = 0x0001, /* speed command */
6061 TPACPI_FAN_CMD_LEVEL = 0x0002, /* level command */
6062 TPACPI_FAN_CMD_ENABLE = 0x0004, /* enable/disable cmd,
6063 * and also watchdog cmd */
6064 };
6065
6066 static int fan_control_allowed;
6067
6068 static enum fan_status_access_mode fan_status_access_mode;
6069 static enum fan_control_access_mode fan_control_access_mode;
6070 static enum fan_control_commands fan_control_commands;
6071
6072 static u8 fan_control_initial_status;
6073 static u8 fan_control_desired_level;
6074 static u8 fan_control_resume_level;
6075 static int fan_watchdog_maxinterval;
6076
6077 static struct mutex fan_mutex;
6078
6079 static void fan_watchdog_fire(struct work_struct *ignored);
6080 static DECLARE_DELAYED_WORK(fan_watchdog_task, fan_watchdog_fire);
6081
6082 TPACPI_HANDLE(fans, ec, "FANS"); /* X31, X40, X41 */
6083 TPACPI_HANDLE(gfan, ec, "GFAN", /* 570 */
6084 "\\FSPD", /* 600e/x, 770e, 770x */
6085 ); /* all others */
6086 TPACPI_HANDLE(sfan, ec, "SFAN", /* 570 */
6087 "JFNS", /* 770x-JL */
6088 ); /* all others */
6089
6090 /*
6091 * Unitialized HFSP quirk: ACPI DSDT and EC fail to initialize the
6092 * HFSP register at boot, so it contains 0x07 but the Thinkpad could
6093 * be in auto mode (0x80).
6094 *
6095 * This is corrected by any write to HFSP either by the driver, or
6096 * by the firmware.
6097 *
6098 * We assume 0x07 really means auto mode while this quirk is active,
6099 * as this is far more likely than the ThinkPad being in level 7,
6100 * which is only used by the firmware during thermal emergencies.
6101 */
6102
6103 static void fan_quirk1_detect(void)
6104 {
6105 /* In some ThinkPads, neither the EC nor the ACPI
6106 * DSDT initialize the HFSP register, and it ends up
6107 * being initially set to 0x07 when it *could* be
6108 * either 0x07 or 0x80.
6109 *
6110 * Enable for TP-1Y (T43), TP-78 (R51e),
6111 * TP-76 (R52), TP-70 (T43, R52), which are known
6112 * to be buggy. */
6113 if (fan_control_initial_status == 0x07) {
6114 switch (thinkpad_id.ec_model) {
6115 case 0x5931: /* TP-1Y */
6116 case 0x3837: /* TP-78 */
6117 case 0x3637: /* TP-76 */
6118 case 0x3037: /* TP-70 */
6119 printk(TPACPI_NOTICE
6120 "fan_init: initial fan status is unknown, "
6121 "assuming it is in auto mode\n");
6122 tp_features.fan_ctrl_status_undef = 1;
6123 ;;
6124 }
6125 }
6126 }
6127
6128 static void fan_quirk1_handle(u8 *fan_status)
6129 {
6130 if (unlikely(tp_features.fan_ctrl_status_undef)) {
6131 if (*fan_status != fan_control_initial_status) {
6132 /* something changed the HFSP regisnter since
6133 * driver init time, so it is not undefined
6134 * anymore */
6135 tp_features.fan_ctrl_status_undef = 0;
6136 } else {
6137 /* Return most likely status. In fact, it
6138 * might be the only possible status */
6139 *fan_status = TP_EC_FAN_AUTO;
6140 }
6141 }
6142 }
6143
6144 /*
6145 * Call with fan_mutex held
6146 */
6147 static void fan_update_desired_level(u8 status)
6148 {
6149 if ((status &
6150 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
6151 if (status > 7)
6152 fan_control_desired_level = 7;
6153 else
6154 fan_control_desired_level = status;
6155 }
6156 }
6157
6158 static int fan_get_status(u8 *status)
6159 {
6160 u8 s;
6161
6162 /* TODO:
6163 * Add TPACPI_FAN_RD_ACPI_FANS ? */
6164
6165 switch (fan_status_access_mode) {
6166 case TPACPI_FAN_RD_ACPI_GFAN:
6167 /* 570, 600e/x, 770e, 770x */
6168
6169 if (unlikely(!acpi_evalf(gfan_handle, &s, NULL, "d")))
6170 return -EIO;
6171
6172 if (likely(status))
6173 *status = s & 0x07;
6174
6175 break;
6176
6177 case TPACPI_FAN_RD_TPEC:
6178 /* all except 570, 600e/x, 770e, 770x */
6179 if (unlikely(!acpi_ec_read(fan_status_offset, &s)))
6180 return -EIO;
6181
6182 if (likely(status)) {
6183 *status = s;
6184 fan_quirk1_handle(status);
6185 }
6186
6187 break;
6188
6189 default:
6190 return -ENXIO;
6191 }
6192
6193 return 0;
6194 }
6195
6196 static int fan_get_status_safe(u8 *status)
6197 {
6198 int rc;
6199 u8 s;
6200
6201 if (mutex_lock_killable(&fan_mutex))
6202 return -ERESTARTSYS;
6203 rc = fan_get_status(&s);
6204 if (!rc)
6205 fan_update_desired_level(s);
6206 mutex_unlock(&fan_mutex);
6207
6208 if (status)
6209 *status = s;
6210
6211 return rc;
6212 }
6213
6214 static int fan_get_speed(unsigned int *speed)
6215 {
6216 u8 hi, lo;
6217
6218 switch (fan_status_access_mode) {
6219 case TPACPI_FAN_RD_TPEC:
6220 /* all except 570, 600e/x, 770e, 770x */
6221 if (unlikely(!acpi_ec_read(fan_rpm_offset, &lo) ||
6222 !acpi_ec_read(fan_rpm_offset + 1, &hi)))
6223 return -EIO;
6224
6225 if (likely(speed))
6226 *speed = (hi << 8) | lo;
6227
6228 break;
6229
6230 default:
6231 return -ENXIO;
6232 }
6233
6234 return 0;
6235 }
6236
6237 static int fan_set_level(int level)
6238 {
6239 if (!fan_control_allowed)
6240 return -EPERM;
6241
6242 switch (fan_control_access_mode) {
6243 case TPACPI_FAN_WR_ACPI_SFAN:
6244 if (level >= 0 && level <= 7) {
6245 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", level))
6246 return -EIO;
6247 } else
6248 return -EINVAL;
6249 break;
6250
6251 case TPACPI_FAN_WR_ACPI_FANS:
6252 case TPACPI_FAN_WR_TPEC:
6253 if (!(level & TP_EC_FAN_AUTO) &&
6254 !(level & TP_EC_FAN_FULLSPEED) &&
6255 ((level < 0) || (level > 7)))
6256 return -EINVAL;
6257
6258 /* safety net should the EC not support AUTO
6259 * or FULLSPEED mode bits and just ignore them */
6260 if (level & TP_EC_FAN_FULLSPEED)
6261 level |= 7; /* safety min speed 7 */
6262 else if (level & TP_EC_FAN_AUTO)
6263 level |= 4; /* safety min speed 4 */
6264
6265 if (!acpi_ec_write(fan_status_offset, level))
6266 return -EIO;
6267 else
6268 tp_features.fan_ctrl_status_undef = 0;
6269 break;
6270
6271 default:
6272 return -ENXIO;
6273 }
6274 return 0;
6275 }
6276
6277 static int fan_set_level_safe(int level)
6278 {
6279 int rc;
6280
6281 if (!fan_control_allowed)
6282 return -EPERM;
6283
6284 if (mutex_lock_killable(&fan_mutex))
6285 return -ERESTARTSYS;
6286
6287 if (level == TPACPI_FAN_LAST_LEVEL)
6288 level = fan_control_desired_level;
6289
6290 rc = fan_set_level(level);
6291 if (!rc)
6292 fan_update_desired_level(level);
6293
6294 mutex_unlock(&fan_mutex);
6295 return rc;
6296 }
6297
6298 static int fan_set_enable(void)
6299 {
6300 u8 s;
6301 int rc;
6302
6303 if (!fan_control_allowed)
6304 return -EPERM;
6305
6306 if (mutex_lock_killable(&fan_mutex))
6307 return -ERESTARTSYS;
6308
6309 switch (fan_control_access_mode) {
6310 case TPACPI_FAN_WR_ACPI_FANS:
6311 case TPACPI_FAN_WR_TPEC:
6312 rc = fan_get_status(&s);
6313 if (rc < 0)
6314 break;
6315
6316 /* Don't go out of emergency fan mode */
6317 if (s != 7) {
6318 s &= 0x07;
6319 s |= TP_EC_FAN_AUTO | 4; /* min fan speed 4 */
6320 }
6321
6322 if (!acpi_ec_write(fan_status_offset, s))
6323 rc = -EIO;
6324 else {
6325 tp_features.fan_ctrl_status_undef = 0;
6326 rc = 0;
6327 }
6328 break;
6329
6330 case TPACPI_FAN_WR_ACPI_SFAN:
6331 rc = fan_get_status(&s);
6332 if (rc < 0)
6333 break;
6334
6335 s &= 0x07;
6336
6337 /* Set fan to at least level 4 */
6338 s |= 4;
6339
6340 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", s))
6341 rc = -EIO;
6342 else
6343 rc = 0;
6344 break;
6345
6346 default:
6347 rc = -ENXIO;
6348 }
6349
6350 mutex_unlock(&fan_mutex);
6351 return rc;
6352 }
6353
6354 static int fan_set_disable(void)
6355 {
6356 int rc;
6357
6358 if (!fan_control_allowed)
6359 return -EPERM;
6360
6361 if (mutex_lock_killable(&fan_mutex))
6362 return -ERESTARTSYS;
6363
6364 rc = 0;
6365 switch (fan_control_access_mode) {
6366 case TPACPI_FAN_WR_ACPI_FANS:
6367 case TPACPI_FAN_WR_TPEC:
6368 if (!acpi_ec_write(fan_status_offset, 0x00))
6369 rc = -EIO;
6370 else {
6371 fan_control_desired_level = 0;
6372 tp_features.fan_ctrl_status_undef = 0;
6373 }
6374 break;
6375
6376 case TPACPI_FAN_WR_ACPI_SFAN:
6377 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", 0x00))
6378 rc = -EIO;
6379 else
6380 fan_control_desired_level = 0;
6381 break;
6382
6383 default:
6384 rc = -ENXIO;
6385 }
6386
6387
6388 mutex_unlock(&fan_mutex);
6389 return rc;
6390 }
6391
6392 static int fan_set_speed(int speed)
6393 {
6394 int rc;
6395
6396 if (!fan_control_allowed)
6397 return -EPERM;
6398
6399 if (mutex_lock_killable(&fan_mutex))
6400 return -ERESTARTSYS;
6401
6402 rc = 0;
6403 switch (fan_control_access_mode) {
6404 case TPACPI_FAN_WR_ACPI_FANS:
6405 if (speed >= 0 && speed <= 65535) {
6406 if (!acpi_evalf(fans_handle, NULL, NULL, "vddd",
6407 speed, speed, speed))
6408 rc = -EIO;
6409 } else
6410 rc = -EINVAL;
6411 break;
6412
6413 default:
6414 rc = -ENXIO;
6415 }
6416
6417 mutex_unlock(&fan_mutex);
6418 return rc;
6419 }
6420
6421 static void fan_watchdog_reset(void)
6422 {
6423 static int fan_watchdog_active;
6424
6425 if (fan_control_access_mode == TPACPI_FAN_WR_NONE)
6426 return;
6427
6428 if (fan_watchdog_active)
6429 cancel_delayed_work(&fan_watchdog_task);
6430
6431 if (fan_watchdog_maxinterval > 0 &&
6432 tpacpi_lifecycle != TPACPI_LIFE_EXITING) {
6433 fan_watchdog_active = 1;
6434 if (!queue_delayed_work(tpacpi_wq, &fan_watchdog_task,
6435 msecs_to_jiffies(fan_watchdog_maxinterval
6436 * 1000))) {
6437 printk(TPACPI_ERR
6438 "failed to queue the fan watchdog, "
6439 "watchdog will not trigger\n");
6440 }
6441 } else
6442 fan_watchdog_active = 0;
6443 }
6444
6445 static void fan_watchdog_fire(struct work_struct *ignored)
6446 {
6447 int rc;
6448
6449 if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
6450 return;
6451
6452 printk(TPACPI_NOTICE "fan watchdog: enabling fan\n");
6453 rc = fan_set_enable();
6454 if (rc < 0) {
6455 printk(TPACPI_ERR "fan watchdog: error %d while enabling fan, "
6456 "will try again later...\n", -rc);
6457 /* reschedule for later */
6458 fan_watchdog_reset();
6459 }
6460 }
6461
6462 /*
6463 * SYSFS fan layout: hwmon compatible (device)
6464 *
6465 * pwm*_enable:
6466 * 0: "disengaged" mode
6467 * 1: manual mode
6468 * 2: native EC "auto" mode (recommended, hardware default)
6469 *
6470 * pwm*: set speed in manual mode, ignored otherwise.
6471 * 0 is level 0; 255 is level 7. Intermediate points done with linear
6472 * interpolation.
6473 *
6474 * fan*_input: tachometer reading, RPM
6475 *
6476 *
6477 * SYSFS fan layout: extensions
6478 *
6479 * fan_watchdog (driver):
6480 * fan watchdog interval in seconds, 0 disables (default), max 120
6481 */
6482
6483 /* sysfs fan pwm1_enable ----------------------------------------------- */
6484 static ssize_t fan_pwm1_enable_show(struct device *dev,
6485 struct device_attribute *attr,
6486 char *buf)
6487 {
6488 int res, mode;
6489 u8 status;
6490
6491 res = fan_get_status_safe(&status);
6492 if (res)
6493 return res;
6494
6495 if (status & TP_EC_FAN_FULLSPEED) {
6496 mode = 0;
6497 } else if (status & TP_EC_FAN_AUTO) {
6498 mode = 2;
6499 } else
6500 mode = 1;
6501
6502 return snprintf(buf, PAGE_SIZE, "%d\n", mode);
6503 }
6504
6505 static ssize_t fan_pwm1_enable_store(struct device *dev,
6506 struct device_attribute *attr,
6507 const char *buf, size_t count)
6508 {
6509 unsigned long t;
6510 int res, level;
6511
6512 if (parse_strtoul(buf, 2, &t))
6513 return -EINVAL;
6514
6515 switch (t) {
6516 case 0:
6517 level = TP_EC_FAN_FULLSPEED;
6518 break;
6519 case 1:
6520 level = TPACPI_FAN_LAST_LEVEL;
6521 break;
6522 case 2:
6523 level = TP_EC_FAN_AUTO;
6524 break;
6525 case 3:
6526 /* reserved for software-controlled auto mode */
6527 return -ENOSYS;
6528 default:
6529 return -EINVAL;
6530 }
6531
6532 res = fan_set_level_safe(level);
6533 if (res == -ENXIO)
6534 return -EINVAL;
6535 else if (res < 0)
6536 return res;
6537
6538 fan_watchdog_reset();
6539
6540 return count;
6541 }
6542
6543 static struct device_attribute dev_attr_fan_pwm1_enable =
6544 __ATTR(pwm1_enable, S_IWUSR | S_IRUGO,
6545 fan_pwm1_enable_show, fan_pwm1_enable_store);
6546
6547 /* sysfs fan pwm1 ------------------------------------------------------ */
6548 static ssize_t fan_pwm1_show(struct device *dev,
6549 struct device_attribute *attr,
6550 char *buf)
6551 {
6552 int res;
6553 u8 status;
6554
6555 res = fan_get_status_safe(&status);
6556 if (res)
6557 return res;
6558
6559 if ((status &
6560 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) != 0)
6561 status = fan_control_desired_level;
6562
6563 if (status > 7)
6564 status = 7;
6565
6566 return snprintf(buf, PAGE_SIZE, "%u\n", (status * 255) / 7);
6567 }
6568
6569 static ssize_t fan_pwm1_store(struct device *dev,
6570 struct device_attribute *attr,
6571 const char *buf, size_t count)
6572 {
6573 unsigned long s;
6574 int rc;
6575 u8 status, newlevel;
6576
6577 if (parse_strtoul(buf, 255, &s))
6578 return -EINVAL;
6579
6580 /* scale down from 0-255 to 0-7 */
6581 newlevel = (s >> 5) & 0x07;
6582
6583 if (mutex_lock_killable(&fan_mutex))
6584 return -ERESTARTSYS;
6585
6586 rc = fan_get_status(&status);
6587 if (!rc && (status &
6588 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
6589 rc = fan_set_level(newlevel);
6590 if (rc == -ENXIO)
6591 rc = -EINVAL;
6592 else if (!rc) {
6593 fan_update_desired_level(newlevel);
6594 fan_watchdog_reset();
6595 }
6596 }
6597
6598 mutex_unlock(&fan_mutex);
6599 return (rc)? rc : count;
6600 }
6601
6602 static struct device_attribute dev_attr_fan_pwm1 =
6603 __ATTR(pwm1, S_IWUSR | S_IRUGO,
6604 fan_pwm1_show, fan_pwm1_store);
6605
6606 /* sysfs fan fan1_input ------------------------------------------------ */
6607 static ssize_t fan_fan1_input_show(struct device *dev,
6608 struct device_attribute *attr,
6609 char *buf)
6610 {
6611 int res;
6612 unsigned int speed;
6613
6614 res = fan_get_speed(&speed);
6615 if (res < 0)
6616 return res;
6617
6618 return snprintf(buf, PAGE_SIZE, "%u\n", speed);
6619 }
6620
6621 static struct device_attribute dev_attr_fan_fan1_input =
6622 __ATTR(fan1_input, S_IRUGO,
6623 fan_fan1_input_show, NULL);
6624
6625 /* sysfs fan fan_watchdog (hwmon driver) ------------------------------- */
6626 static ssize_t fan_fan_watchdog_show(struct device_driver *drv,
6627 char *buf)
6628 {
6629 return snprintf(buf, PAGE_SIZE, "%u\n", fan_watchdog_maxinterval);
6630 }
6631
6632 static ssize_t fan_fan_watchdog_store(struct device_driver *drv,
6633 const char *buf, size_t count)
6634 {
6635 unsigned long t;
6636
6637 if (parse_strtoul(buf, 120, &t))
6638 return -EINVAL;
6639
6640 if (!fan_control_allowed)
6641 return -EPERM;
6642
6643 fan_watchdog_maxinterval = t;
6644 fan_watchdog_reset();
6645
6646 return count;
6647 }
6648
6649 static DRIVER_ATTR(fan_watchdog, S_IWUSR | S_IRUGO,
6650 fan_fan_watchdog_show, fan_fan_watchdog_store);
6651
6652 /* --------------------------------------------------------------------- */
6653 static struct attribute *fan_attributes[] = {
6654 &dev_attr_fan_pwm1_enable.attr, &dev_attr_fan_pwm1.attr,
6655 &dev_attr_fan_fan1_input.attr,
6656 NULL
6657 };
6658
6659 static const struct attribute_group fan_attr_group = {
6660 .attrs = fan_attributes,
6661 };
6662
6663 static int __init fan_init(struct ibm_init_struct *iibm)
6664 {
6665 int rc;
6666
6667 vdbg_printk(TPACPI_DBG_INIT, "initializing fan subdriver\n");
6668
6669 mutex_init(&fan_mutex);
6670 fan_status_access_mode = TPACPI_FAN_NONE;
6671 fan_control_access_mode = TPACPI_FAN_WR_NONE;
6672 fan_control_commands = 0;
6673 fan_watchdog_maxinterval = 0;
6674 tp_features.fan_ctrl_status_undef = 0;
6675 fan_control_desired_level = 7;
6676
6677 TPACPI_ACPIHANDLE_INIT(fans);
6678 TPACPI_ACPIHANDLE_INIT(gfan);
6679 TPACPI_ACPIHANDLE_INIT(sfan);
6680
6681 if (gfan_handle) {
6682 /* 570, 600e/x, 770e, 770x */
6683 fan_status_access_mode = TPACPI_FAN_RD_ACPI_GFAN;
6684 } else {
6685 /* all other ThinkPads: note that even old-style
6686 * ThinkPad ECs supports the fan control register */
6687 if (likely(acpi_ec_read(fan_status_offset,
6688 &fan_control_initial_status))) {
6689 fan_status_access_mode = TPACPI_FAN_RD_TPEC;
6690 fan_quirk1_detect();
6691 } else {
6692 printk(TPACPI_ERR
6693 "ThinkPad ACPI EC access misbehaving, "
6694 "fan status and control unavailable\n");
6695 return 1;
6696 }
6697 }
6698
6699 if (sfan_handle) {
6700 /* 570, 770x-JL */
6701 fan_control_access_mode = TPACPI_FAN_WR_ACPI_SFAN;
6702 fan_control_commands |=
6703 TPACPI_FAN_CMD_LEVEL | TPACPI_FAN_CMD_ENABLE;
6704 } else {
6705 if (!gfan_handle) {
6706 /* gfan without sfan means no fan control */
6707 /* all other models implement TP EC 0x2f control */
6708
6709 if (fans_handle) {
6710 /* X31, X40, X41 */
6711 fan_control_access_mode =
6712 TPACPI_FAN_WR_ACPI_FANS;
6713 fan_control_commands |=
6714 TPACPI_FAN_CMD_SPEED |
6715 TPACPI_FAN_CMD_LEVEL |
6716 TPACPI_FAN_CMD_ENABLE;
6717 } else {
6718 fan_control_access_mode = TPACPI_FAN_WR_TPEC;
6719 fan_control_commands |=
6720 TPACPI_FAN_CMD_LEVEL |
6721 TPACPI_FAN_CMD_ENABLE;
6722 }
6723 }
6724 }
6725
6726 vdbg_printk(TPACPI_DBG_INIT, "fan is %s, modes %d, %d\n",
6727 str_supported(fan_status_access_mode != TPACPI_FAN_NONE ||
6728 fan_control_access_mode != TPACPI_FAN_WR_NONE),
6729 fan_status_access_mode, fan_control_access_mode);
6730
6731 /* fan control master switch */
6732 if (!fan_control_allowed) {
6733 fan_control_access_mode = TPACPI_FAN_WR_NONE;
6734 fan_control_commands = 0;
6735 dbg_printk(TPACPI_DBG_INIT,
6736 "fan control features disabled by parameter\n");
6737 }
6738
6739 /* update fan_control_desired_level */
6740 if (fan_status_access_mode != TPACPI_FAN_NONE)
6741 fan_get_status_safe(NULL);
6742
6743 if (fan_status_access_mode != TPACPI_FAN_NONE ||
6744 fan_control_access_mode != TPACPI_FAN_WR_NONE) {
6745 rc = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
6746 &fan_attr_group);
6747 if (rc < 0)
6748 return rc;
6749
6750 rc = driver_create_file(&tpacpi_hwmon_pdriver.driver,
6751 &driver_attr_fan_watchdog);
6752 if (rc < 0) {
6753 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
6754 &fan_attr_group);
6755 return rc;
6756 }
6757 return 0;
6758 } else
6759 return 1;
6760 }
6761
6762 static void fan_exit(void)
6763 {
6764 vdbg_printk(TPACPI_DBG_EXIT,
6765 "cancelling any pending fan watchdog tasks\n");
6766
6767 /* FIXME: can we really do this unconditionally? */
6768 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj, &fan_attr_group);
6769 driver_remove_file(&tpacpi_hwmon_pdriver.driver,
6770 &driver_attr_fan_watchdog);
6771
6772 cancel_delayed_work(&fan_watchdog_task);
6773 flush_workqueue(tpacpi_wq);
6774 }
6775
6776 static void fan_suspend(pm_message_t state)
6777 {
6778 int rc;
6779
6780 if (!fan_control_allowed)
6781 return;
6782
6783 /* Store fan status in cache */
6784 fan_control_resume_level = 0;
6785 rc = fan_get_status_safe(&fan_control_resume_level);
6786 if (rc < 0)
6787 printk(TPACPI_NOTICE
6788 "failed to read fan level for later "
6789 "restore during resume: %d\n", rc);
6790
6791 /* if it is undefined, don't attempt to restore it.
6792 * KEEP THIS LAST */
6793 if (tp_features.fan_ctrl_status_undef)
6794 fan_control_resume_level = 0;
6795 }
6796
6797 static void fan_resume(void)
6798 {
6799 u8 current_level = 7;
6800 bool do_set = false;
6801 int rc;
6802
6803 /* DSDT *always* updates status on resume */
6804 tp_features.fan_ctrl_status_undef = 0;
6805
6806 if (!fan_control_allowed ||
6807 !fan_control_resume_level ||
6808 (fan_get_status_safe(&current_level) < 0))
6809 return;
6810
6811 switch (fan_control_access_mode) {
6812 case TPACPI_FAN_WR_ACPI_SFAN:
6813 /* never decrease fan level */
6814 do_set = (fan_control_resume_level > current_level);
6815 break;
6816 case TPACPI_FAN_WR_ACPI_FANS:
6817 case TPACPI_FAN_WR_TPEC:
6818 /* never decrease fan level, scale is:
6819 * TP_EC_FAN_FULLSPEED > 7 >= TP_EC_FAN_AUTO
6820 *
6821 * We expect the firmware to set either 7 or AUTO, but we
6822 * handle FULLSPEED out of paranoia.
6823 *
6824 * So, we can safely only restore FULLSPEED or 7, anything
6825 * else could slow the fan. Restoring AUTO is useless, at
6826 * best that's exactly what the DSDT already set (it is the
6827 * slower it uses).
6828 *
6829 * Always keep in mind that the DSDT *will* have set the
6830 * fans to what the vendor supposes is the best level. We
6831 * muck with it only to speed the fan up.
6832 */
6833 if (fan_control_resume_level != 7 &&
6834 !(fan_control_resume_level & TP_EC_FAN_FULLSPEED))
6835 return;
6836 else
6837 do_set = !(current_level & TP_EC_FAN_FULLSPEED) &&
6838 (current_level != fan_control_resume_level);
6839 break;
6840 default:
6841 return;
6842 }
6843 if (do_set) {
6844 printk(TPACPI_NOTICE
6845 "restoring fan level to 0x%02x\n",
6846 fan_control_resume_level);
6847 rc = fan_set_level_safe(fan_control_resume_level);
6848 if (rc < 0)
6849 printk(TPACPI_NOTICE
6850 "failed to restore fan level: %d\n", rc);
6851 }
6852 }
6853
6854 static int fan_read(char *p)
6855 {
6856 int len = 0;
6857 int rc;
6858 u8 status;
6859 unsigned int speed = 0;
6860
6861 switch (fan_status_access_mode) {
6862 case TPACPI_FAN_RD_ACPI_GFAN:
6863 /* 570, 600e/x, 770e, 770x */
6864 rc = fan_get_status_safe(&status);
6865 if (rc < 0)
6866 return rc;
6867
6868 len += sprintf(p + len, "status:\t\t%s\n"
6869 "level:\t\t%d\n",
6870 (status != 0) ? "enabled" : "disabled", status);
6871 break;
6872
6873 case TPACPI_FAN_RD_TPEC:
6874 /* all except 570, 600e/x, 770e, 770x */
6875 rc = fan_get_status_safe(&status);
6876 if (rc < 0)
6877 return rc;
6878
6879 len += sprintf(p + len, "status:\t\t%s\n",
6880 (status != 0) ? "enabled" : "disabled");
6881
6882 rc = fan_get_speed(&speed);
6883 if (rc < 0)
6884 return rc;
6885
6886 len += sprintf(p + len, "speed:\t\t%d\n", speed);
6887
6888 if (status & TP_EC_FAN_FULLSPEED)
6889 /* Disengaged mode takes precedence */
6890 len += sprintf(p + len, "level:\t\tdisengaged\n");
6891 else if (status & TP_EC_FAN_AUTO)
6892 len += sprintf(p + len, "level:\t\tauto\n");
6893 else
6894 len += sprintf(p + len, "level:\t\t%d\n", status);
6895 break;
6896
6897 case TPACPI_FAN_NONE:
6898 default:
6899 len += sprintf(p + len, "status:\t\tnot supported\n");
6900 }
6901
6902 if (fan_control_commands & TPACPI_FAN_CMD_LEVEL) {
6903 len += sprintf(p + len, "commands:\tlevel <level>");
6904
6905 switch (fan_control_access_mode) {
6906 case TPACPI_FAN_WR_ACPI_SFAN:
6907 len += sprintf(p + len, " (<level> is 0-7)\n");
6908 break;
6909
6910 default:
6911 len += sprintf(p + len, " (<level> is 0-7, "
6912 "auto, disengaged, full-speed)\n");
6913 break;
6914 }
6915 }
6916
6917 if (fan_control_commands & TPACPI_FAN_CMD_ENABLE)
6918 len += sprintf(p + len, "commands:\tenable, disable\n"
6919 "commands:\twatchdog <timeout> (<timeout> "
6920 "is 0 (off), 1-120 (seconds))\n");
6921
6922 if (fan_control_commands & TPACPI_FAN_CMD_SPEED)
6923 len += sprintf(p + len, "commands:\tspeed <speed>"
6924 " (<speed> is 0-65535)\n");
6925
6926 return len;
6927 }
6928
6929 static int fan_write_cmd_level(const char *cmd, int *rc)
6930 {
6931 int level;
6932
6933 if (strlencmp(cmd, "level auto") == 0)
6934 level = TP_EC_FAN_AUTO;
6935 else if ((strlencmp(cmd, "level disengaged") == 0) |
6936 (strlencmp(cmd, "level full-speed") == 0))
6937 level = TP_EC_FAN_FULLSPEED;
6938 else if (sscanf(cmd, "level %d", &level) != 1)
6939 return 0;
6940
6941 *rc = fan_set_level_safe(level);
6942 if (*rc == -ENXIO)
6943 printk(TPACPI_ERR "level command accepted for unsupported "
6944 "access mode %d", fan_control_access_mode);
6945
6946 return 1;
6947 }
6948
6949 static int fan_write_cmd_enable(const char *cmd, int *rc)
6950 {
6951 if (strlencmp(cmd, "enable") != 0)
6952 return 0;
6953
6954 *rc = fan_set_enable();
6955 if (*rc == -ENXIO)
6956 printk(TPACPI_ERR "enable command accepted for unsupported "
6957 "access mode %d", fan_control_access_mode);
6958
6959 return 1;
6960 }
6961
6962 static int fan_write_cmd_disable(const char *cmd, int *rc)
6963 {
6964 if (strlencmp(cmd, "disable") != 0)
6965 return 0;
6966
6967 *rc = fan_set_disable();
6968 if (*rc == -ENXIO)
6969 printk(TPACPI_ERR "disable command accepted for unsupported "
6970 "access mode %d", fan_control_access_mode);
6971
6972 return 1;
6973 }
6974
6975 static int fan_write_cmd_speed(const char *cmd, int *rc)
6976 {
6977 int speed;
6978
6979 /* TODO:
6980 * Support speed <low> <medium> <high> ? */
6981
6982 if (sscanf(cmd, "speed %d", &speed) != 1)
6983 return 0;
6984
6985 *rc = fan_set_speed(speed);
6986 if (*rc == -ENXIO)
6987 printk(TPACPI_ERR "speed command accepted for unsupported "
6988 "access mode %d", fan_control_access_mode);
6989
6990 return 1;
6991 }
6992
6993 static int fan_write_cmd_watchdog(const char *cmd, int *rc)
6994 {
6995 int interval;
6996
6997 if (sscanf(cmd, "watchdog %d", &interval) != 1)
6998 return 0;
6999
7000 if (interval < 0 || interval > 120)
7001 *rc = -EINVAL;
7002 else
7003 fan_watchdog_maxinterval = interval;
7004
7005 return 1;
7006 }
7007
7008 static int fan_write(char *buf)
7009 {
7010 char *cmd;
7011 int rc = 0;
7012
7013 while (!rc && (cmd = next_cmd(&buf))) {
7014 if (!((fan_control_commands & TPACPI_FAN_CMD_LEVEL) &&
7015 fan_write_cmd_level(cmd, &rc)) &&
7016 !((fan_control_commands & TPACPI_FAN_CMD_ENABLE) &&
7017 (fan_write_cmd_enable(cmd, &rc) ||
7018 fan_write_cmd_disable(cmd, &rc) ||
7019 fan_write_cmd_watchdog(cmd, &rc))) &&
7020 !((fan_control_commands & TPACPI_FAN_CMD_SPEED) &&
7021 fan_write_cmd_speed(cmd, &rc))
7022 )
7023 rc = -EINVAL;
7024 else if (!rc)
7025 fan_watchdog_reset();
7026 }
7027
7028 return rc;
7029 }
7030
7031 static struct ibm_struct fan_driver_data = {
7032 .name = "fan",
7033 .read = fan_read,
7034 .write = fan_write,
7035 .exit = fan_exit,
7036 .suspend = fan_suspend,
7037 .resume = fan_resume,
7038 };
7039
7040 /****************************************************************************
7041 ****************************************************************************
7042 *
7043 * Infrastructure
7044 *
7045 ****************************************************************************
7046 ****************************************************************************/
7047
7048 /* sysfs name ---------------------------------------------------------- */
7049 static ssize_t thinkpad_acpi_pdev_name_show(struct device *dev,
7050 struct device_attribute *attr,
7051 char *buf)
7052 {
7053 return snprintf(buf, PAGE_SIZE, "%s\n", TPACPI_NAME);
7054 }
7055
7056 static struct device_attribute dev_attr_thinkpad_acpi_pdev_name =
7057 __ATTR(name, S_IRUGO, thinkpad_acpi_pdev_name_show, NULL);
7058
7059 /* --------------------------------------------------------------------- */
7060
7061 /* /proc support */
7062 static struct proc_dir_entry *proc_dir;
7063
7064 /*
7065 * Module and infrastructure proble, init and exit handling
7066 */
7067
7068 static int force_load;
7069
7070 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
7071 static const char * __init str_supported(int is_supported)
7072 {
7073 static char text_unsupported[] __initdata = "not supported";
7074
7075 return (is_supported)? &text_unsupported[4] : &text_unsupported[0];
7076 }
7077 #endif /* CONFIG_THINKPAD_ACPI_DEBUG */
7078
7079 static void ibm_exit(struct ibm_struct *ibm)
7080 {
7081 dbg_printk(TPACPI_DBG_EXIT, "removing %s\n", ibm->name);
7082
7083 list_del_init(&ibm->all_drivers);
7084
7085 if (ibm->flags.acpi_notify_installed) {
7086 dbg_printk(TPACPI_DBG_EXIT,
7087 "%s: acpi_remove_notify_handler\n", ibm->name);
7088 BUG_ON(!ibm->acpi);
7089 acpi_remove_notify_handler(*ibm->acpi->handle,
7090 ibm->acpi->type,
7091 dispatch_acpi_notify);
7092 ibm->flags.acpi_notify_installed = 0;
7093 ibm->flags.acpi_notify_installed = 0;
7094 }
7095
7096 if (ibm->flags.proc_created) {
7097 dbg_printk(TPACPI_DBG_EXIT,
7098 "%s: remove_proc_entry\n", ibm->name);
7099 remove_proc_entry(ibm->name, proc_dir);
7100 ibm->flags.proc_created = 0;
7101 }
7102
7103 if (ibm->flags.acpi_driver_registered) {
7104 dbg_printk(TPACPI_DBG_EXIT,
7105 "%s: acpi_bus_unregister_driver\n", ibm->name);
7106 BUG_ON(!ibm->acpi);
7107 acpi_bus_unregister_driver(ibm->acpi->driver);
7108 kfree(ibm->acpi->driver);
7109 ibm->acpi->driver = NULL;
7110 ibm->flags.acpi_driver_registered = 0;
7111 }
7112
7113 if (ibm->flags.init_called && ibm->exit) {
7114 ibm->exit();
7115 ibm->flags.init_called = 0;
7116 }
7117
7118 dbg_printk(TPACPI_DBG_INIT, "finished removing %s\n", ibm->name);
7119 }
7120
7121 static int __init ibm_init(struct ibm_init_struct *iibm)
7122 {
7123 int ret;
7124 struct ibm_struct *ibm = iibm->data;
7125 struct proc_dir_entry *entry;
7126
7127 BUG_ON(ibm == NULL);
7128
7129 INIT_LIST_HEAD(&ibm->all_drivers);
7130
7131 if (ibm->flags.experimental && !experimental)
7132 return 0;
7133
7134 dbg_printk(TPACPI_DBG_INIT,
7135 "probing for %s\n", ibm->name);
7136
7137 if (iibm->init) {
7138 ret = iibm->init(iibm);
7139 if (ret > 0)
7140 return 0; /* probe failed */
7141 if (ret)
7142 return ret;
7143
7144 ibm->flags.init_called = 1;
7145 }
7146
7147 if (ibm->acpi) {
7148 if (ibm->acpi->hid) {
7149 ret = register_tpacpi_subdriver(ibm);
7150 if (ret)
7151 goto err_out;
7152 }
7153
7154 if (ibm->acpi->notify) {
7155 ret = setup_acpi_notify(ibm);
7156 if (ret == -ENODEV) {
7157 printk(TPACPI_NOTICE "disabling subdriver %s\n",
7158 ibm->name);
7159 ret = 0;
7160 goto err_out;
7161 }
7162 if (ret < 0)
7163 goto err_out;
7164 }
7165 }
7166
7167 dbg_printk(TPACPI_DBG_INIT,
7168 "%s installed\n", ibm->name);
7169
7170 if (ibm->read) {
7171 entry = create_proc_entry(ibm->name,
7172 S_IFREG | S_IRUGO | S_IWUSR,
7173 proc_dir);
7174 if (!entry) {
7175 printk(TPACPI_ERR "unable to create proc entry %s\n",
7176 ibm->name);
7177 ret = -ENODEV;
7178 goto err_out;
7179 }
7180 entry->owner = THIS_MODULE;
7181 entry->data = ibm;
7182 entry->read_proc = &dispatch_procfs_read;
7183 if (ibm->write)
7184 entry->write_proc = &dispatch_procfs_write;
7185 ibm->flags.proc_created = 1;
7186 }
7187
7188 list_add_tail(&ibm->all_drivers, &tpacpi_all_drivers);
7189
7190 return 0;
7191
7192 err_out:
7193 dbg_printk(TPACPI_DBG_INIT,
7194 "%s: at error exit path with result %d\n",
7195 ibm->name, ret);
7196
7197 ibm_exit(ibm);
7198 return (ret < 0)? ret : 0;
7199 }
7200
7201 /* Probing */
7202
7203 /* returns 0 - probe ok, or < 0 - probe error.
7204 * Probe ok doesn't mean thinkpad found.
7205 * On error, kfree() cleanup on tp->* is not performed, caller must do it */
7206 static int __must_check __init get_thinkpad_model_data(
7207 struct thinkpad_id_data *tp)
7208 {
7209 const struct dmi_device *dev = NULL;
7210 char ec_fw_string[18];
7211 char const *s;
7212
7213 if (!tp)
7214 return -EINVAL;
7215
7216 memset(tp, 0, sizeof(*tp));
7217
7218 if (dmi_name_in_vendors("IBM"))
7219 tp->vendor = PCI_VENDOR_ID_IBM;
7220 else if (dmi_name_in_vendors("LENOVO"))
7221 tp->vendor = PCI_VENDOR_ID_LENOVO;
7222 else
7223 return 0;
7224
7225 s = dmi_get_system_info(DMI_BIOS_VERSION);
7226 tp->bios_version_str = kstrdup(s, GFP_KERNEL);
7227 if (s && !tp->bios_version_str)
7228 return -ENOMEM;
7229 if (!tp->bios_version_str)
7230 return 0;
7231 tp->bios_model = tp->bios_version_str[0]
7232 | (tp->bios_version_str[1] << 8);
7233
7234 /*
7235 * ThinkPad T23 or newer, A31 or newer, R50e or newer,
7236 * X32 or newer, all Z series; Some models must have an
7237 * up-to-date BIOS or they will not be detected.
7238 *
7239 * See http://thinkwiki.org/wiki/List_of_DMI_IDs
7240 */
7241 while ((dev = dmi_find_device(DMI_DEV_TYPE_OEM_STRING, NULL, dev))) {
7242 if (sscanf(dev->name,
7243 "IBM ThinkPad Embedded Controller -[%17c",
7244 ec_fw_string) == 1) {
7245 ec_fw_string[sizeof(ec_fw_string) - 1] = 0;
7246 ec_fw_string[strcspn(ec_fw_string, " ]")] = 0;
7247
7248 tp->ec_version_str = kstrdup(ec_fw_string, GFP_KERNEL);
7249 if (!tp->ec_version_str)
7250 return -ENOMEM;
7251 tp->ec_model = ec_fw_string[0]
7252 | (ec_fw_string[1] << 8);
7253 break;
7254 }
7255 }
7256
7257 s = dmi_get_system_info(DMI_PRODUCT_VERSION);
7258 if (s && !strnicmp(s, "ThinkPad", 8)) {
7259 tp->model_str = kstrdup(s, GFP_KERNEL);
7260 if (!tp->model_str)
7261 return -ENOMEM;
7262 }
7263
7264 s = dmi_get_system_info(DMI_PRODUCT_NAME);
7265 tp->nummodel_str = kstrdup(s, GFP_KERNEL);
7266 if (s && !tp->nummodel_str)
7267 return -ENOMEM;
7268
7269 return 0;
7270 }
7271
7272 static int __init probe_for_thinkpad(void)
7273 {
7274 int is_thinkpad;
7275
7276 if (acpi_disabled)
7277 return -ENODEV;
7278
7279 /*
7280 * Non-ancient models have better DMI tagging, but very old models
7281 * don't.
7282 */
7283 is_thinkpad = (thinkpad_id.model_str != NULL);
7284
7285 /* ec is required because many other handles are relative to it */
7286 TPACPI_ACPIHANDLE_INIT(ec);
7287 if (!ec_handle) {
7288 if (is_thinkpad)
7289 printk(TPACPI_ERR
7290 "Not yet supported ThinkPad detected!\n");
7291 return -ENODEV;
7292 }
7293
7294 /*
7295 * Risks a regression on very old machines, but reduces potential
7296 * false positives a damn great deal
7297 */
7298 if (!is_thinkpad)
7299 is_thinkpad = (thinkpad_id.vendor == PCI_VENDOR_ID_IBM);
7300
7301 if (!is_thinkpad && !force_load)
7302 return -ENODEV;
7303
7304 return 0;
7305 }
7306
7307
7308 /* Module init, exit, parameters */
7309
7310 static struct ibm_init_struct ibms_init[] __initdata = {
7311 {
7312 .init = thinkpad_acpi_driver_init,
7313 .data = &thinkpad_acpi_driver_data,
7314 },
7315 {
7316 .init = hotkey_init,
7317 .data = &hotkey_driver_data,
7318 },
7319 {
7320 .init = bluetooth_init,
7321 .data = &bluetooth_driver_data,
7322 },
7323 {
7324 .init = wan_init,
7325 .data = &wan_driver_data,
7326 },
7327 {
7328 .init = uwb_init,
7329 .data = &uwb_driver_data,
7330 },
7331 #ifdef CONFIG_THINKPAD_ACPI_VIDEO
7332 {
7333 .init = video_init,
7334 .data = &video_driver_data,
7335 },
7336 #endif
7337 {
7338 .init = light_init,
7339 .data = &light_driver_data,
7340 },
7341 #ifdef CONFIG_THINKPAD_ACPI_DOCK
7342 {
7343 .init = dock_init,
7344 .data = &dock_driver_data[0],
7345 },
7346 {
7347 .init = dock_init2,
7348 .data = &dock_driver_data[1],
7349 },
7350 #endif
7351 #ifdef CONFIG_THINKPAD_ACPI_BAY
7352 {
7353 .init = bay_init,
7354 .data = &bay_driver_data,
7355 },
7356 #endif
7357 {
7358 .init = cmos_init,
7359 .data = &cmos_driver_data,
7360 },
7361 {
7362 .init = led_init,
7363 .data = &led_driver_data,
7364 },
7365 {
7366 .init = beep_init,
7367 .data = &beep_driver_data,
7368 },
7369 {
7370 .init = thermal_init,
7371 .data = &thermal_driver_data,
7372 },
7373 {
7374 .data = &ecdump_driver_data,
7375 },
7376 {
7377 .init = brightness_init,
7378 .data = &brightness_driver_data,
7379 },
7380 {
7381 .data = &volume_driver_data,
7382 },
7383 {
7384 .init = fan_init,
7385 .data = &fan_driver_data,
7386 },
7387 };
7388
7389 static int __init set_ibm_param(const char *val, struct kernel_param *kp)
7390 {
7391 unsigned int i;
7392 struct ibm_struct *ibm;
7393
7394 if (!kp || !kp->name || !val)
7395 return -EINVAL;
7396
7397 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
7398 ibm = ibms_init[i].data;
7399 WARN_ON(ibm == NULL);
7400
7401 if (!ibm || !ibm->name)
7402 continue;
7403
7404 if (strcmp(ibm->name, kp->name) == 0 && ibm->write) {
7405 if (strlen(val) > sizeof(ibms_init[i].param) - 2)
7406 return -ENOSPC;
7407 strcpy(ibms_init[i].param, val);
7408 strcat(ibms_init[i].param, ",");
7409 return 0;
7410 }
7411 }
7412
7413 return -EINVAL;
7414 }
7415
7416 module_param(experimental, int, 0);
7417 MODULE_PARM_DESC(experimental,
7418 "Enables experimental features when non-zero");
7419
7420 module_param_named(debug, dbg_level, uint, 0);
7421 MODULE_PARM_DESC(debug, "Sets debug level bit-mask");
7422
7423 module_param(force_load, bool, 0);
7424 MODULE_PARM_DESC(force_load,
7425 "Attempts to load the driver even on a "
7426 "mis-identified ThinkPad when true");
7427
7428 module_param_named(fan_control, fan_control_allowed, bool, 0);
7429 MODULE_PARM_DESC(fan_control,
7430 "Enables setting fan parameters features when true");
7431
7432 module_param_named(brightness_mode, brightness_mode, int, 0);
7433 MODULE_PARM_DESC(brightness_mode,
7434 "Selects brightness control strategy: "
7435 "0=auto, 1=EC, 2=CMOS, 3=both");
7436
7437 module_param(brightness_enable, uint, 0);
7438 MODULE_PARM_DESC(brightness_enable,
7439 "Enables backlight control when 1, disables when 0");
7440
7441 module_param(hotkey_report_mode, uint, 0);
7442 MODULE_PARM_DESC(hotkey_report_mode,
7443 "used for backwards compatibility with userspace, "
7444 "see documentation");
7445
7446 #define TPACPI_PARAM(feature) \
7447 module_param_call(feature, set_ibm_param, NULL, NULL, 0); \
7448 MODULE_PARM_DESC(feature, "Simulates thinkpad-acpi procfs command " \
7449 "at module load, see documentation")
7450
7451 TPACPI_PARAM(hotkey);
7452 TPACPI_PARAM(bluetooth);
7453 TPACPI_PARAM(video);
7454 TPACPI_PARAM(light);
7455 #ifdef CONFIG_THINKPAD_ACPI_DOCK
7456 TPACPI_PARAM(dock);
7457 #endif
7458 #ifdef CONFIG_THINKPAD_ACPI_BAY
7459 TPACPI_PARAM(bay);
7460 #endif /* CONFIG_THINKPAD_ACPI_BAY */
7461 TPACPI_PARAM(cmos);
7462 TPACPI_PARAM(led);
7463 TPACPI_PARAM(beep);
7464 TPACPI_PARAM(ecdump);
7465 TPACPI_PARAM(brightness);
7466 TPACPI_PARAM(volume);
7467 TPACPI_PARAM(fan);
7468
7469 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
7470 module_param(dbg_wlswemul, uint, 0);
7471 MODULE_PARM_DESC(dbg_wlswemul, "Enables WLSW emulation");
7472 module_param_named(wlsw_state, tpacpi_wlsw_emulstate, bool, 0);
7473 MODULE_PARM_DESC(wlsw_state,
7474 "Initial state of the emulated WLSW switch");
7475
7476 module_param(dbg_bluetoothemul, uint, 0);
7477 MODULE_PARM_DESC(dbg_bluetoothemul, "Enables bluetooth switch emulation");
7478 module_param_named(bluetooth_state, tpacpi_bluetooth_emulstate, bool, 0);
7479 MODULE_PARM_DESC(bluetooth_state,
7480 "Initial state of the emulated bluetooth switch");
7481
7482 module_param(dbg_wwanemul, uint, 0);
7483 MODULE_PARM_DESC(dbg_wwanemul, "Enables WWAN switch emulation");
7484 module_param_named(wwan_state, tpacpi_wwan_emulstate, bool, 0);
7485 MODULE_PARM_DESC(wwan_state,
7486 "Initial state of the emulated WWAN switch");
7487
7488 module_param(dbg_uwbemul, uint, 0);
7489 MODULE_PARM_DESC(dbg_uwbemul, "Enables UWB switch emulation");
7490 module_param_named(uwb_state, tpacpi_uwb_emulstate, bool, 0);
7491 MODULE_PARM_DESC(uwb_state,
7492 "Initial state of the emulated UWB switch");
7493 #endif
7494
7495 static void thinkpad_acpi_module_exit(void)
7496 {
7497 struct ibm_struct *ibm, *itmp;
7498
7499 tpacpi_lifecycle = TPACPI_LIFE_EXITING;
7500
7501 list_for_each_entry_safe_reverse(ibm, itmp,
7502 &tpacpi_all_drivers,
7503 all_drivers) {
7504 ibm_exit(ibm);
7505 }
7506
7507 dbg_printk(TPACPI_DBG_INIT, "finished subdriver exit path...\n");
7508
7509 if (tpacpi_inputdev) {
7510 if (tp_features.input_device_registered)
7511 input_unregister_device(tpacpi_inputdev);
7512 else
7513 input_free_device(tpacpi_inputdev);
7514 }
7515
7516 if (tpacpi_hwmon)
7517 hwmon_device_unregister(tpacpi_hwmon);
7518
7519 if (tp_features.sensors_pdev_attrs_registered)
7520 device_remove_file(&tpacpi_sensors_pdev->dev,
7521 &dev_attr_thinkpad_acpi_pdev_name);
7522 if (tpacpi_sensors_pdev)
7523 platform_device_unregister(tpacpi_sensors_pdev);
7524 if (tpacpi_pdev)
7525 platform_device_unregister(tpacpi_pdev);
7526
7527 if (tp_features.sensors_pdrv_attrs_registered)
7528 tpacpi_remove_driver_attributes(&tpacpi_hwmon_pdriver.driver);
7529 if (tp_features.platform_drv_attrs_registered)
7530 tpacpi_remove_driver_attributes(&tpacpi_pdriver.driver);
7531
7532 if (tp_features.sensors_pdrv_registered)
7533 platform_driver_unregister(&tpacpi_hwmon_pdriver);
7534
7535 if (tp_features.platform_drv_registered)
7536 platform_driver_unregister(&tpacpi_pdriver);
7537
7538 if (proc_dir)
7539 remove_proc_entry(TPACPI_PROC_DIR, acpi_root_dir);
7540
7541 if (tpacpi_wq)
7542 destroy_workqueue(tpacpi_wq);
7543
7544 kfree(thinkpad_id.bios_version_str);
7545 kfree(thinkpad_id.ec_version_str);
7546 kfree(thinkpad_id.model_str);
7547 }
7548
7549
7550 static int __init thinkpad_acpi_module_init(void)
7551 {
7552 int ret, i;
7553
7554 tpacpi_lifecycle = TPACPI_LIFE_INIT;
7555
7556 /* Parameter checking */
7557 if (hotkey_report_mode > 2)
7558 return -EINVAL;
7559
7560 /* Driver-level probe */
7561
7562 ret = get_thinkpad_model_data(&thinkpad_id);
7563 if (ret) {
7564 printk(TPACPI_ERR
7565 "unable to get DMI data: %d\n", ret);
7566 thinkpad_acpi_module_exit();
7567 return ret;
7568 }
7569 ret = probe_for_thinkpad();
7570 if (ret) {
7571 thinkpad_acpi_module_exit();
7572 return ret;
7573 }
7574
7575 /* Driver initialization */
7576
7577 TPACPI_ACPIHANDLE_INIT(ecrd);
7578 TPACPI_ACPIHANDLE_INIT(ecwr);
7579
7580 tpacpi_wq = create_singlethread_workqueue(TPACPI_WORKQUEUE_NAME);
7581 if (!tpacpi_wq) {
7582 thinkpad_acpi_module_exit();
7583 return -ENOMEM;
7584 }
7585
7586 proc_dir = proc_mkdir(TPACPI_PROC_DIR, acpi_root_dir);
7587 if (!proc_dir) {
7588 printk(TPACPI_ERR
7589 "unable to create proc dir " TPACPI_PROC_DIR);
7590 thinkpad_acpi_module_exit();
7591 return -ENODEV;
7592 }
7593 proc_dir->owner = THIS_MODULE;
7594
7595 ret = platform_driver_register(&tpacpi_pdriver);
7596 if (ret) {
7597 printk(TPACPI_ERR
7598 "unable to register main platform driver\n");
7599 thinkpad_acpi_module_exit();
7600 return ret;
7601 }
7602 tp_features.platform_drv_registered = 1;
7603
7604 ret = platform_driver_register(&tpacpi_hwmon_pdriver);
7605 if (ret) {
7606 printk(TPACPI_ERR
7607 "unable to register hwmon platform driver\n");
7608 thinkpad_acpi_module_exit();
7609 return ret;
7610 }
7611 tp_features.sensors_pdrv_registered = 1;
7612
7613 ret = tpacpi_create_driver_attributes(&tpacpi_pdriver.driver);
7614 if (!ret) {
7615 tp_features.platform_drv_attrs_registered = 1;
7616 ret = tpacpi_create_driver_attributes(
7617 &tpacpi_hwmon_pdriver.driver);
7618 }
7619 if (ret) {
7620 printk(TPACPI_ERR
7621 "unable to create sysfs driver attributes\n");
7622 thinkpad_acpi_module_exit();
7623 return ret;
7624 }
7625 tp_features.sensors_pdrv_attrs_registered = 1;
7626
7627
7628 /* Device initialization */
7629 tpacpi_pdev = platform_device_register_simple(TPACPI_DRVR_NAME, -1,
7630 NULL, 0);
7631 if (IS_ERR(tpacpi_pdev)) {
7632 ret = PTR_ERR(tpacpi_pdev);
7633 tpacpi_pdev = NULL;
7634 printk(TPACPI_ERR "unable to register platform device\n");
7635 thinkpad_acpi_module_exit();
7636 return ret;
7637 }
7638 tpacpi_sensors_pdev = platform_device_register_simple(
7639 TPACPI_HWMON_DRVR_NAME,
7640 -1, NULL, 0);
7641 if (IS_ERR(tpacpi_sensors_pdev)) {
7642 ret = PTR_ERR(tpacpi_sensors_pdev);
7643 tpacpi_sensors_pdev = NULL;
7644 printk(TPACPI_ERR
7645 "unable to register hwmon platform device\n");
7646 thinkpad_acpi_module_exit();
7647 return ret;
7648 }
7649 ret = device_create_file(&tpacpi_sensors_pdev->dev,
7650 &dev_attr_thinkpad_acpi_pdev_name);
7651 if (ret) {
7652 printk(TPACPI_ERR
7653 "unable to create sysfs hwmon device attributes\n");
7654 thinkpad_acpi_module_exit();
7655 return ret;
7656 }
7657 tp_features.sensors_pdev_attrs_registered = 1;
7658 tpacpi_hwmon = hwmon_device_register(&tpacpi_sensors_pdev->dev);
7659 if (IS_ERR(tpacpi_hwmon)) {
7660 ret = PTR_ERR(tpacpi_hwmon);
7661 tpacpi_hwmon = NULL;
7662 printk(TPACPI_ERR "unable to register hwmon device\n");
7663 thinkpad_acpi_module_exit();
7664 return ret;
7665 }
7666 mutex_init(&tpacpi_inputdev_send_mutex);
7667 tpacpi_inputdev = input_allocate_device();
7668 if (!tpacpi_inputdev) {
7669 printk(TPACPI_ERR "unable to allocate input device\n");
7670 thinkpad_acpi_module_exit();
7671 return -ENOMEM;
7672 } else {
7673 /* Prepare input device, but don't register */
7674 tpacpi_inputdev->name = "ThinkPad Extra Buttons";
7675 tpacpi_inputdev->phys = TPACPI_DRVR_NAME "/input0";
7676 tpacpi_inputdev->id.bustype = BUS_HOST;
7677 tpacpi_inputdev->id.vendor = (thinkpad_id.vendor) ?
7678 thinkpad_id.vendor :
7679 PCI_VENDOR_ID_IBM;
7680 tpacpi_inputdev->id.product = TPACPI_HKEY_INPUT_PRODUCT;
7681 tpacpi_inputdev->id.version = TPACPI_HKEY_INPUT_VERSION;
7682 }
7683 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
7684 ret = ibm_init(&ibms_init[i]);
7685 if (ret >= 0 && *ibms_init[i].param)
7686 ret = ibms_init[i].data->write(ibms_init[i].param);
7687 if (ret < 0) {
7688 thinkpad_acpi_module_exit();
7689 return ret;
7690 }
7691 }
7692 ret = input_register_device(tpacpi_inputdev);
7693 if (ret < 0) {
7694 printk(TPACPI_ERR "unable to register input device\n");
7695 thinkpad_acpi_module_exit();
7696 return ret;
7697 } else {
7698 tp_features.input_device_registered = 1;
7699 }
7700
7701 tpacpi_lifecycle = TPACPI_LIFE_RUNNING;
7702 return 0;
7703 }
7704
7705 MODULE_ALIAS(TPACPI_DRVR_SHORTNAME);
7706
7707 /*
7708 * DMI matching for module autoloading
7709 *
7710 * See http://thinkwiki.org/wiki/List_of_DMI_IDs
7711 * See http://thinkwiki.org/wiki/BIOS_Upgrade_Downloads
7712 *
7713 * Only models listed in thinkwiki will be supported, so add yours
7714 * if it is not there yet.
7715 */
7716 #define IBM_BIOS_MODULE_ALIAS(__type) \
7717 MODULE_ALIAS("dmi:bvnIBM:bvr" __type "ET??WW*")
7718
7719 /* Non-ancient thinkpads */
7720 MODULE_ALIAS("dmi:bvnIBM:*:svnIBM:*:pvrThinkPad*:rvnIBM:*");
7721 MODULE_ALIAS("dmi:bvnLENOVO:*:svnLENOVO:*:pvrThinkPad*:rvnLENOVO:*");
7722
7723 /* Ancient thinkpad BIOSes have to be identified by
7724 * BIOS type or model number, and there are far less
7725 * BIOS types than model numbers... */
7726 IBM_BIOS_MODULE_ALIAS("I[BDHIMNOTWVYZ]");
7727 IBM_BIOS_MODULE_ALIAS("1[0368A-GIKM-PST]");
7728 IBM_BIOS_MODULE_ALIAS("K[UX-Z]");
7729
7730 MODULE_AUTHOR("Borislav Deianov, Henrique de Moraes Holschuh");
7731 MODULE_DESCRIPTION(TPACPI_DESC);
7732 MODULE_VERSION(TPACPI_VERSION);
7733 MODULE_LICENSE("GPL");
7734
7735 module_init(thinkpad_acpi_module_init);
7736 module_exit(thinkpad_acpi_module_exit);
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree