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[mirror_ubuntu-bionic-kernel.git] / drivers / platform / x86 / thinkpad_acpi.c
1 /*
2 * thinkpad_acpi.c - ThinkPad ACPI Extras
3 *
4 *
5 * Copyright (C) 2004-2005 Borislav Deianov <borislav@users.sf.net>
6 * Copyright (C) 2006-2009 Henrique de Moraes Holschuh <hmh@hmh.eng.br>
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
21 * 02110-1301, USA.
22 */
23
24 #define TPACPI_VERSION "0.23"
25 #define TPACPI_SYSFS_VERSION 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 /* printk headers */
170 #define TPACPI_LOG TPACPI_FILE ": "
171 #define TPACPI_EMERG KERN_EMERG TPACPI_LOG
172 #define TPACPI_ALERT KERN_ALERT TPACPI_LOG
173 #define TPACPI_CRIT KERN_CRIT TPACPI_LOG
174 #define TPACPI_ERR KERN_ERR TPACPI_LOG
175 #define TPACPI_WARN KERN_WARNING TPACPI_LOG
176 #define TPACPI_NOTICE KERN_NOTICE TPACPI_LOG
177 #define TPACPI_INFO KERN_INFO TPACPI_LOG
178 #define TPACPI_DEBUG KERN_DEBUG TPACPI_LOG
179
180 /* Debugging printk groups */
181 #define TPACPI_DBG_ALL 0xffff
182 #define TPACPI_DBG_DISCLOSETASK 0x8000
183 #define TPACPI_DBG_INIT 0x0001
184 #define TPACPI_DBG_EXIT 0x0002
185 #define TPACPI_DBG_RFKILL 0x0004
186 #define TPACPI_DBG_HKEY 0x0008
187 #define TPACPI_DBG_FAN 0x0010
188 #define TPACPI_DBG_BRGHT 0x0020
189
190 #define onoff(status, bit) ((status) & (1 << (bit)) ? "on" : "off")
191 #define enabled(status, bit) ((status) & (1 << (bit)) ? "enabled" : "disabled")
192 #define strlencmp(a, b) (strncmp((a), (b), strlen(b)))
193
194
195 /****************************************************************************
196 * Driver-wide structs and misc. variables
197 */
198
199 struct ibm_struct;
200
201 struct tp_acpi_drv_struct {
202 const struct acpi_device_id *hid;
203 struct acpi_driver *driver;
204
205 void (*notify) (struct ibm_struct *, u32);
206 acpi_handle *handle;
207 u32 type;
208 struct acpi_device *device;
209 };
210
211 struct ibm_struct {
212 char *name;
213
214 int (*read) (char *);
215 int (*write) (char *);
216 void (*exit) (void);
217 void (*resume) (void);
218 void (*suspend) (pm_message_t state);
219 void (*shutdown) (void);
220
221 struct list_head all_drivers;
222
223 struct tp_acpi_drv_struct *acpi;
224
225 struct {
226 u8 acpi_driver_registered:1;
227 u8 acpi_notify_installed:1;
228 u8 proc_created:1;
229 u8 init_called:1;
230 u8 experimental:1;
231 } flags;
232 };
233
234 struct ibm_init_struct {
235 char param[32];
236
237 int (*init) (struct ibm_init_struct *);
238 struct ibm_struct *data;
239 };
240
241 static struct {
242 #ifdef CONFIG_THINKPAD_ACPI_BAY
243 u32 bay_status:1;
244 u32 bay_eject:1;
245 u32 bay_status2:1;
246 u32 bay_eject2:1;
247 #endif
248 u32 bluetooth:1;
249 u32 hotkey:1;
250 u32 hotkey_mask:1;
251 u32 hotkey_wlsw:1;
252 u32 hotkey_tablet:1;
253 u32 light:1;
254 u32 light_status:1;
255 u32 bright_16levels:1;
256 u32 bright_acpimode:1;
257 u32 wan:1;
258 u32 uwb:1;
259 u32 fan_ctrl_status_undef:1;
260 u32 input_device_registered:1;
261 u32 platform_drv_registered:1;
262 u32 platform_drv_attrs_registered:1;
263 u32 sensors_pdrv_registered:1;
264 u32 sensors_pdrv_attrs_registered:1;
265 u32 sensors_pdev_attrs_registered:1;
266 u32 hotkey_poll_active:1;
267 } tp_features;
268
269 static struct {
270 u16 hotkey_mask_ff:1;
271 } tp_warned;
272
273 struct thinkpad_id_data {
274 unsigned int vendor; /* ThinkPad vendor:
275 * PCI_VENDOR_ID_IBM/PCI_VENDOR_ID_LENOVO */
276
277 char *bios_version_str; /* Something like 1ZET51WW (1.03z) */
278 char *ec_version_str; /* Something like 1ZHT51WW-1.04a */
279
280 u16 bios_model; /* Big Endian, TP-1Y = 0x5931, 0 = unknown */
281 u16 ec_model;
282
283 char *model_str; /* ThinkPad T43 */
284 char *nummodel_str; /* 9384A9C for a 9384-A9C model */
285 };
286 static struct thinkpad_id_data thinkpad_id;
287
288 static enum {
289 TPACPI_LIFE_INIT = 0,
290 TPACPI_LIFE_RUNNING,
291 TPACPI_LIFE_EXITING,
292 } tpacpi_lifecycle;
293
294 static int experimental;
295 static u32 dbg_level;
296
297 static struct workqueue_struct *tpacpi_wq;
298
299 enum led_status_t {
300 TPACPI_LED_OFF = 0,
301 TPACPI_LED_ON,
302 TPACPI_LED_BLINK,
303 };
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_status_t new_state;
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 void printk_deprecated_attribute(const char * const what,
1002 const char * const details)
1003 {
1004 tpacpi_log_usertask("deprecated sysfs attribute");
1005 printk(TPACPI_WARN "WARNING: sysfs attribute %s is deprecated and "
1006 "will be removed. %s\n",
1007 what, details);
1008 }
1009
1010 /*************************************************************************
1011 * rfkill and radio control support helpers
1012 */
1013
1014 /*
1015 * ThinkPad-ACPI firmware handling model:
1016 *
1017 * WLSW (master wireless switch) is event-driven, and is common to all
1018 * firmware-controlled radios. It cannot be controlled, just monitored,
1019 * as expected. It overrides all radio state in firmware
1020 *
1021 * The kernel, a masked-off hotkey, and WLSW can change the radio state
1022 * (TODO: verify how WLSW interacts with the returned radio state).
1023 *
1024 * The only time there are shadow radio state changes, is when
1025 * masked-off hotkeys are used.
1026 */
1027
1028 /*
1029 * Internal driver API for radio state:
1030 *
1031 * int: < 0 = error, otherwise enum tpacpi_rfkill_state
1032 * bool: true means radio blocked (off)
1033 */
1034 enum tpacpi_rfkill_state {
1035 TPACPI_RFK_RADIO_OFF = 0,
1036 TPACPI_RFK_RADIO_ON
1037 };
1038
1039 /* rfkill switches */
1040 enum tpacpi_rfk_id {
1041 TPACPI_RFK_BLUETOOTH_SW_ID = 0,
1042 TPACPI_RFK_WWAN_SW_ID,
1043 TPACPI_RFK_UWB_SW_ID,
1044 TPACPI_RFK_SW_MAX
1045 };
1046
1047 static const char *tpacpi_rfkill_names[] = {
1048 [TPACPI_RFK_BLUETOOTH_SW_ID] = "bluetooth",
1049 [TPACPI_RFK_WWAN_SW_ID] = "wwan",
1050 [TPACPI_RFK_UWB_SW_ID] = "uwb",
1051 [TPACPI_RFK_SW_MAX] = NULL
1052 };
1053
1054 /* ThinkPad-ACPI rfkill subdriver */
1055 struct tpacpi_rfk {
1056 struct rfkill *rfkill;
1057 enum tpacpi_rfk_id id;
1058 const struct tpacpi_rfk_ops *ops;
1059 };
1060
1061 struct tpacpi_rfk_ops {
1062 /* firmware interface */
1063 int (*get_status)(void);
1064 int (*set_status)(const enum tpacpi_rfkill_state);
1065 };
1066
1067 static struct tpacpi_rfk *tpacpi_rfkill_switches[TPACPI_RFK_SW_MAX];
1068
1069 /* Query FW and update rfkill sw state for a given rfkill switch */
1070 static int tpacpi_rfk_update_swstate(const struct tpacpi_rfk *tp_rfk)
1071 {
1072 int status;
1073
1074 if (!tp_rfk)
1075 return -ENODEV;
1076
1077 status = (tp_rfk->ops->get_status)();
1078 if (status < 0)
1079 return status;
1080
1081 rfkill_set_sw_state(tp_rfk->rfkill,
1082 (status == TPACPI_RFK_RADIO_OFF));
1083
1084 return status;
1085 }
1086
1087 /* Query FW and update rfkill sw state for all rfkill switches */
1088 static void tpacpi_rfk_update_swstate_all(void)
1089 {
1090 unsigned int i;
1091
1092 for (i = 0; i < TPACPI_RFK_SW_MAX; i++)
1093 tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[i]);
1094 }
1095
1096 /*
1097 * Sync the HW-blocking state of all rfkill switches,
1098 * do notice it causes the rfkill core to schedule uevents
1099 */
1100 static void tpacpi_rfk_update_hwblock_state(bool blocked)
1101 {
1102 unsigned int i;
1103 struct tpacpi_rfk *tp_rfk;
1104
1105 for (i = 0; i < TPACPI_RFK_SW_MAX; i++) {
1106 tp_rfk = tpacpi_rfkill_switches[i];
1107 if (tp_rfk) {
1108 if (rfkill_set_hw_state(tp_rfk->rfkill,
1109 blocked)) {
1110 /* ignore -- we track sw block */
1111 }
1112 }
1113 }
1114 }
1115
1116 /* Call to get the WLSW state from the firmware */
1117 static int hotkey_get_wlsw(void);
1118
1119 /* Call to query WLSW state and update all rfkill switches */
1120 static bool tpacpi_rfk_check_hwblock_state(void)
1121 {
1122 int res = hotkey_get_wlsw();
1123 int hw_blocked;
1124
1125 /* When unknown or unsupported, we have to assume it is unblocked */
1126 if (res < 0)
1127 return false;
1128
1129 hw_blocked = (res == TPACPI_RFK_RADIO_OFF);
1130 tpacpi_rfk_update_hwblock_state(hw_blocked);
1131
1132 return hw_blocked;
1133 }
1134
1135 static int tpacpi_rfk_hook_set_block(void *data, bool blocked)
1136 {
1137 struct tpacpi_rfk *tp_rfk = data;
1138 int res;
1139
1140 dbg_printk(TPACPI_DBG_RFKILL,
1141 "request to change radio state to %s\n",
1142 blocked ? "blocked" : "unblocked");
1143
1144 /* try to set radio state */
1145 res = (tp_rfk->ops->set_status)(blocked ?
1146 TPACPI_RFK_RADIO_OFF : TPACPI_RFK_RADIO_ON);
1147
1148 /* and update the rfkill core with whatever the FW really did */
1149 tpacpi_rfk_update_swstate(tp_rfk);
1150
1151 return (res < 0) ? res : 0;
1152 }
1153
1154 static const struct rfkill_ops tpacpi_rfk_rfkill_ops = {
1155 .set_block = tpacpi_rfk_hook_set_block,
1156 };
1157
1158 static int __init tpacpi_new_rfkill(const enum tpacpi_rfk_id id,
1159 const struct tpacpi_rfk_ops *tp_rfkops,
1160 const enum rfkill_type rfktype,
1161 const char *name,
1162 const bool set_default)
1163 {
1164 struct tpacpi_rfk *atp_rfk;
1165 int res;
1166 bool initial_sw_state = false;
1167 int initial_sw_status;
1168
1169 BUG_ON(id >= TPACPI_RFK_SW_MAX || tpacpi_rfkill_switches[id]);
1170
1171 initial_sw_status = (tp_rfkops->get_status)();
1172 if (initial_sw_status < 0) {
1173 printk(TPACPI_ERR
1174 "failed to read initial state for %s, error %d; "
1175 "will turn radio off\n", name, initial_sw_status);
1176 } else {
1177 initial_sw_state = (initial_sw_status == TPACPI_RFK_RADIO_OFF);
1178 if (set_default) {
1179 /* try to set the initial state as the default for the
1180 * rfkill type, since we ask the firmware to preserve
1181 * it across S5 in NVRAM */
1182 rfkill_set_global_sw_state(rfktype, initial_sw_state);
1183 }
1184 }
1185
1186 atp_rfk = kzalloc(sizeof(struct tpacpi_rfk), GFP_KERNEL);
1187 if (atp_rfk)
1188 atp_rfk->rfkill = rfkill_alloc(name,
1189 &tpacpi_pdev->dev,
1190 rfktype,
1191 &tpacpi_rfk_rfkill_ops,
1192 atp_rfk);
1193 if (!atp_rfk || !atp_rfk->rfkill) {
1194 printk(TPACPI_ERR
1195 "failed to allocate memory for rfkill class\n");
1196 kfree(atp_rfk);
1197 return -ENOMEM;
1198 }
1199
1200 atp_rfk->id = id;
1201 atp_rfk->ops = tp_rfkops;
1202
1203 rfkill_set_states(atp_rfk->rfkill, initial_sw_state,
1204 tpacpi_rfk_check_hwblock_state());
1205
1206 res = rfkill_register(atp_rfk->rfkill);
1207 if (res < 0) {
1208 printk(TPACPI_ERR
1209 "failed to register %s rfkill switch: %d\n",
1210 name, res);
1211 rfkill_destroy(atp_rfk->rfkill);
1212 kfree(atp_rfk);
1213 return res;
1214 }
1215
1216 tpacpi_rfkill_switches[id] = atp_rfk;
1217 return 0;
1218 }
1219
1220 static void tpacpi_destroy_rfkill(const enum tpacpi_rfk_id id)
1221 {
1222 struct tpacpi_rfk *tp_rfk;
1223
1224 BUG_ON(id >= TPACPI_RFK_SW_MAX);
1225
1226 tp_rfk = tpacpi_rfkill_switches[id];
1227 if (tp_rfk) {
1228 rfkill_unregister(tp_rfk->rfkill);
1229 tpacpi_rfkill_switches[id] = NULL;
1230 kfree(tp_rfk);
1231 }
1232 }
1233
1234 static void printk_deprecated_rfkill_attribute(const char * const what)
1235 {
1236 printk_deprecated_attribute(what,
1237 "Please switch to generic rfkill before year 2010");
1238 }
1239
1240 /* sysfs <radio> enable ------------------------------------------------ */
1241 static ssize_t tpacpi_rfk_sysfs_enable_show(const enum tpacpi_rfk_id id,
1242 struct device_attribute *attr,
1243 char *buf)
1244 {
1245 int status;
1246
1247 printk_deprecated_rfkill_attribute(attr->attr.name);
1248
1249 /* This is in the ABI... */
1250 if (tpacpi_rfk_check_hwblock_state()) {
1251 status = TPACPI_RFK_RADIO_OFF;
1252 } else {
1253 status = tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]);
1254 if (status < 0)
1255 return status;
1256 }
1257
1258 return snprintf(buf, PAGE_SIZE, "%d\n",
1259 (status == TPACPI_RFK_RADIO_ON) ? 1 : 0);
1260 }
1261
1262 static ssize_t tpacpi_rfk_sysfs_enable_store(const enum tpacpi_rfk_id id,
1263 struct device_attribute *attr,
1264 const char *buf, size_t count)
1265 {
1266 unsigned long t;
1267 int res;
1268
1269 printk_deprecated_rfkill_attribute(attr->attr.name);
1270
1271 if (parse_strtoul(buf, 1, &t))
1272 return -EINVAL;
1273
1274 tpacpi_disclose_usertask(attr->attr.name, "set to %ld\n", t);
1275
1276 /* This is in the ABI... */
1277 if (tpacpi_rfk_check_hwblock_state() && !!t)
1278 return -EPERM;
1279
1280 res = tpacpi_rfkill_switches[id]->ops->set_status((!!t) ?
1281 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF);
1282 tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]);
1283
1284 return (res < 0) ? res : count;
1285 }
1286
1287 /* procfs -------------------------------------------------------------- */
1288 static int tpacpi_rfk_procfs_read(const enum tpacpi_rfk_id id, char *p)
1289 {
1290 int len = 0;
1291
1292 if (id >= TPACPI_RFK_SW_MAX)
1293 len += sprintf(p + len, "status:\t\tnot supported\n");
1294 else {
1295 int status;
1296
1297 /* This is in the ABI... */
1298 if (tpacpi_rfk_check_hwblock_state()) {
1299 status = TPACPI_RFK_RADIO_OFF;
1300 } else {
1301 status = tpacpi_rfk_update_swstate(
1302 tpacpi_rfkill_switches[id]);
1303 if (status < 0)
1304 return status;
1305 }
1306
1307 len += sprintf(p + len, "status:\t\t%s\n",
1308 (status == TPACPI_RFK_RADIO_ON) ?
1309 "enabled" : "disabled");
1310 len += sprintf(p + len, "commands:\tenable, disable\n");
1311 }
1312
1313 return len;
1314 }
1315
1316 static int tpacpi_rfk_procfs_write(const enum tpacpi_rfk_id id, char *buf)
1317 {
1318 char *cmd;
1319 int status = -1;
1320 int res = 0;
1321
1322 if (id >= TPACPI_RFK_SW_MAX)
1323 return -ENODEV;
1324
1325 while ((cmd = next_cmd(&buf))) {
1326 if (strlencmp(cmd, "enable") == 0)
1327 status = TPACPI_RFK_RADIO_ON;
1328 else if (strlencmp(cmd, "disable") == 0)
1329 status = TPACPI_RFK_RADIO_OFF;
1330 else
1331 return -EINVAL;
1332 }
1333
1334 if (status != -1) {
1335 tpacpi_disclose_usertask("procfs", "attempt to %s %s\n",
1336 (status == TPACPI_RFK_RADIO_ON) ?
1337 "enable" : "disable",
1338 tpacpi_rfkill_names[id]);
1339 res = (tpacpi_rfkill_switches[id]->ops->set_status)(status);
1340 tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]);
1341 }
1342
1343 return res;
1344 }
1345
1346 /*************************************************************************
1347 * thinkpad-acpi driver attributes
1348 */
1349
1350 /* interface_version --------------------------------------------------- */
1351 static ssize_t tpacpi_driver_interface_version_show(
1352 struct device_driver *drv,
1353 char *buf)
1354 {
1355 return snprintf(buf, PAGE_SIZE, "0x%08x\n", TPACPI_SYSFS_VERSION);
1356 }
1357
1358 static DRIVER_ATTR(interface_version, S_IRUGO,
1359 tpacpi_driver_interface_version_show, NULL);
1360
1361 /* debug_level --------------------------------------------------------- */
1362 static ssize_t tpacpi_driver_debug_show(struct device_driver *drv,
1363 char *buf)
1364 {
1365 return snprintf(buf, PAGE_SIZE, "0x%04x\n", dbg_level);
1366 }
1367
1368 static ssize_t tpacpi_driver_debug_store(struct device_driver *drv,
1369 const char *buf, size_t count)
1370 {
1371 unsigned long t;
1372
1373 if (parse_strtoul(buf, 0xffff, &t))
1374 return -EINVAL;
1375
1376 dbg_level = t;
1377
1378 return count;
1379 }
1380
1381 static DRIVER_ATTR(debug_level, S_IWUSR | S_IRUGO,
1382 tpacpi_driver_debug_show, tpacpi_driver_debug_store);
1383
1384 /* version ------------------------------------------------------------- */
1385 static ssize_t tpacpi_driver_version_show(struct device_driver *drv,
1386 char *buf)
1387 {
1388 return snprintf(buf, PAGE_SIZE, "%s v%s\n",
1389 TPACPI_DESC, TPACPI_VERSION);
1390 }
1391
1392 static DRIVER_ATTR(version, S_IRUGO,
1393 tpacpi_driver_version_show, NULL);
1394
1395 /* --------------------------------------------------------------------- */
1396
1397 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
1398
1399 /* wlsw_emulstate ------------------------------------------------------ */
1400 static ssize_t tpacpi_driver_wlsw_emulstate_show(struct device_driver *drv,
1401 char *buf)
1402 {
1403 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_wlsw_emulstate);
1404 }
1405
1406 static ssize_t tpacpi_driver_wlsw_emulstate_store(struct device_driver *drv,
1407 const char *buf, size_t count)
1408 {
1409 unsigned long t;
1410
1411 if (parse_strtoul(buf, 1, &t))
1412 return -EINVAL;
1413
1414 if (tpacpi_wlsw_emulstate != !!t) {
1415 tpacpi_wlsw_emulstate = !!t;
1416 tpacpi_rfk_update_hwblock_state(!t); /* negative logic */
1417 }
1418
1419 return count;
1420 }
1421
1422 static DRIVER_ATTR(wlsw_emulstate, S_IWUSR | S_IRUGO,
1423 tpacpi_driver_wlsw_emulstate_show,
1424 tpacpi_driver_wlsw_emulstate_store);
1425
1426 /* bluetooth_emulstate ------------------------------------------------- */
1427 static ssize_t tpacpi_driver_bluetooth_emulstate_show(
1428 struct device_driver *drv,
1429 char *buf)
1430 {
1431 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_bluetooth_emulstate);
1432 }
1433
1434 static ssize_t tpacpi_driver_bluetooth_emulstate_store(
1435 struct device_driver *drv,
1436 const char *buf, size_t count)
1437 {
1438 unsigned long t;
1439
1440 if (parse_strtoul(buf, 1, &t))
1441 return -EINVAL;
1442
1443 tpacpi_bluetooth_emulstate = !!t;
1444
1445 return count;
1446 }
1447
1448 static DRIVER_ATTR(bluetooth_emulstate, S_IWUSR | S_IRUGO,
1449 tpacpi_driver_bluetooth_emulstate_show,
1450 tpacpi_driver_bluetooth_emulstate_store);
1451
1452 /* wwan_emulstate ------------------------------------------------- */
1453 static ssize_t tpacpi_driver_wwan_emulstate_show(
1454 struct device_driver *drv,
1455 char *buf)
1456 {
1457 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_wwan_emulstate);
1458 }
1459
1460 static ssize_t tpacpi_driver_wwan_emulstate_store(
1461 struct device_driver *drv,
1462 const char *buf, size_t count)
1463 {
1464 unsigned long t;
1465
1466 if (parse_strtoul(buf, 1, &t))
1467 return -EINVAL;
1468
1469 tpacpi_wwan_emulstate = !!t;
1470
1471 return count;
1472 }
1473
1474 static DRIVER_ATTR(wwan_emulstate, S_IWUSR | S_IRUGO,
1475 tpacpi_driver_wwan_emulstate_show,
1476 tpacpi_driver_wwan_emulstate_store);
1477
1478 /* uwb_emulstate ------------------------------------------------- */
1479 static ssize_t tpacpi_driver_uwb_emulstate_show(
1480 struct device_driver *drv,
1481 char *buf)
1482 {
1483 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_uwb_emulstate);
1484 }
1485
1486 static ssize_t tpacpi_driver_uwb_emulstate_store(
1487 struct device_driver *drv,
1488 const char *buf, size_t count)
1489 {
1490 unsigned long t;
1491
1492 if (parse_strtoul(buf, 1, &t))
1493 return -EINVAL;
1494
1495 tpacpi_uwb_emulstate = !!t;
1496
1497 return count;
1498 }
1499
1500 static DRIVER_ATTR(uwb_emulstate, S_IWUSR | S_IRUGO,
1501 tpacpi_driver_uwb_emulstate_show,
1502 tpacpi_driver_uwb_emulstate_store);
1503 #endif
1504
1505 /* --------------------------------------------------------------------- */
1506
1507 static struct driver_attribute *tpacpi_driver_attributes[] = {
1508 &driver_attr_debug_level, &driver_attr_version,
1509 &driver_attr_interface_version,
1510 };
1511
1512 static int __init tpacpi_create_driver_attributes(struct device_driver *drv)
1513 {
1514 int i, res;
1515
1516 i = 0;
1517 res = 0;
1518 while (!res && i < ARRAY_SIZE(tpacpi_driver_attributes)) {
1519 res = driver_create_file(drv, tpacpi_driver_attributes[i]);
1520 i++;
1521 }
1522
1523 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
1524 if (!res && dbg_wlswemul)
1525 res = driver_create_file(drv, &driver_attr_wlsw_emulstate);
1526 if (!res && dbg_bluetoothemul)
1527 res = driver_create_file(drv, &driver_attr_bluetooth_emulstate);
1528 if (!res && dbg_wwanemul)
1529 res = driver_create_file(drv, &driver_attr_wwan_emulstate);
1530 if (!res && dbg_uwbemul)
1531 res = driver_create_file(drv, &driver_attr_uwb_emulstate);
1532 #endif
1533
1534 return res;
1535 }
1536
1537 static void tpacpi_remove_driver_attributes(struct device_driver *drv)
1538 {
1539 int i;
1540
1541 for (i = 0; i < ARRAY_SIZE(tpacpi_driver_attributes); i++)
1542 driver_remove_file(drv, tpacpi_driver_attributes[i]);
1543
1544 #ifdef THINKPAD_ACPI_DEBUGFACILITIES
1545 driver_remove_file(drv, &driver_attr_wlsw_emulstate);
1546 driver_remove_file(drv, &driver_attr_bluetooth_emulstate);
1547 driver_remove_file(drv, &driver_attr_wwan_emulstate);
1548 driver_remove_file(drv, &driver_attr_uwb_emulstate);
1549 #endif
1550 }
1551
1552 /****************************************************************************
1553 ****************************************************************************
1554 *
1555 * Subdrivers
1556 *
1557 ****************************************************************************
1558 ****************************************************************************/
1559
1560 /*************************************************************************
1561 * thinkpad-acpi init subdriver
1562 */
1563
1564 static int __init thinkpad_acpi_driver_init(struct ibm_init_struct *iibm)
1565 {
1566 printk(TPACPI_INFO "%s v%s\n", TPACPI_DESC, TPACPI_VERSION);
1567 printk(TPACPI_INFO "%s\n", TPACPI_URL);
1568
1569 printk(TPACPI_INFO "ThinkPad BIOS %s, EC %s\n",
1570 (thinkpad_id.bios_version_str) ?
1571 thinkpad_id.bios_version_str : "unknown",
1572 (thinkpad_id.ec_version_str) ?
1573 thinkpad_id.ec_version_str : "unknown");
1574
1575 if (thinkpad_id.vendor && thinkpad_id.model_str)
1576 printk(TPACPI_INFO "%s %s, model %s\n",
1577 (thinkpad_id.vendor == PCI_VENDOR_ID_IBM) ?
1578 "IBM" : ((thinkpad_id.vendor ==
1579 PCI_VENDOR_ID_LENOVO) ?
1580 "Lenovo" : "Unknown vendor"),
1581 thinkpad_id.model_str,
1582 (thinkpad_id.nummodel_str) ?
1583 thinkpad_id.nummodel_str : "unknown");
1584
1585 return 0;
1586 }
1587
1588 static int thinkpad_acpi_driver_read(char *p)
1589 {
1590 int len = 0;
1591
1592 len += sprintf(p + len, "driver:\t\t%s\n", TPACPI_DESC);
1593 len += sprintf(p + len, "version:\t%s\n", TPACPI_VERSION);
1594
1595 return len;
1596 }
1597
1598 static struct ibm_struct thinkpad_acpi_driver_data = {
1599 .name = "driver",
1600 .read = thinkpad_acpi_driver_read,
1601 };
1602
1603 /*************************************************************************
1604 * Hotkey subdriver
1605 */
1606
1607 enum { /* hot key scan codes (derived from ACPI DSDT) */
1608 TP_ACPI_HOTKEYSCAN_FNF1 = 0,
1609 TP_ACPI_HOTKEYSCAN_FNF2,
1610 TP_ACPI_HOTKEYSCAN_FNF3,
1611 TP_ACPI_HOTKEYSCAN_FNF4,
1612 TP_ACPI_HOTKEYSCAN_FNF5,
1613 TP_ACPI_HOTKEYSCAN_FNF6,
1614 TP_ACPI_HOTKEYSCAN_FNF7,
1615 TP_ACPI_HOTKEYSCAN_FNF8,
1616 TP_ACPI_HOTKEYSCAN_FNF9,
1617 TP_ACPI_HOTKEYSCAN_FNF10,
1618 TP_ACPI_HOTKEYSCAN_FNF11,
1619 TP_ACPI_HOTKEYSCAN_FNF12,
1620 TP_ACPI_HOTKEYSCAN_FNBACKSPACE,
1621 TP_ACPI_HOTKEYSCAN_FNINSERT,
1622 TP_ACPI_HOTKEYSCAN_FNDELETE,
1623 TP_ACPI_HOTKEYSCAN_FNHOME,
1624 TP_ACPI_HOTKEYSCAN_FNEND,
1625 TP_ACPI_HOTKEYSCAN_FNPAGEUP,
1626 TP_ACPI_HOTKEYSCAN_FNPAGEDOWN,
1627 TP_ACPI_HOTKEYSCAN_FNSPACE,
1628 TP_ACPI_HOTKEYSCAN_VOLUMEUP,
1629 TP_ACPI_HOTKEYSCAN_VOLUMEDOWN,
1630 TP_ACPI_HOTKEYSCAN_MUTE,
1631 TP_ACPI_HOTKEYSCAN_THINKPAD,
1632 };
1633
1634 enum { /* Keys available through NVRAM polling */
1635 TPACPI_HKEY_NVRAM_KNOWN_MASK = 0x00fb88c0U,
1636 TPACPI_HKEY_NVRAM_GOOD_MASK = 0x00fb8000U,
1637 };
1638
1639 enum { /* Positions of some of the keys in hotkey masks */
1640 TP_ACPI_HKEY_DISPSWTCH_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF7,
1641 TP_ACPI_HKEY_DISPXPAND_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF8,
1642 TP_ACPI_HKEY_HIBERNATE_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF12,
1643 TP_ACPI_HKEY_BRGHTUP_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNHOME,
1644 TP_ACPI_HKEY_BRGHTDWN_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNEND,
1645 TP_ACPI_HKEY_THNKLGHT_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNPAGEUP,
1646 TP_ACPI_HKEY_ZOOM_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNSPACE,
1647 TP_ACPI_HKEY_VOLUP_MASK = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEUP,
1648 TP_ACPI_HKEY_VOLDWN_MASK = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEDOWN,
1649 TP_ACPI_HKEY_MUTE_MASK = 1 << TP_ACPI_HOTKEYSCAN_MUTE,
1650 TP_ACPI_HKEY_THINKPAD_MASK = 1 << TP_ACPI_HOTKEYSCAN_THINKPAD,
1651 };
1652
1653 enum { /* NVRAM to ACPI HKEY group map */
1654 TP_NVRAM_HKEY_GROUP_HK2 = TP_ACPI_HKEY_THINKPAD_MASK |
1655 TP_ACPI_HKEY_ZOOM_MASK |
1656 TP_ACPI_HKEY_DISPSWTCH_MASK |
1657 TP_ACPI_HKEY_HIBERNATE_MASK,
1658 TP_NVRAM_HKEY_GROUP_BRIGHTNESS = TP_ACPI_HKEY_BRGHTUP_MASK |
1659 TP_ACPI_HKEY_BRGHTDWN_MASK,
1660 TP_NVRAM_HKEY_GROUP_VOLUME = TP_ACPI_HKEY_VOLUP_MASK |
1661 TP_ACPI_HKEY_VOLDWN_MASK |
1662 TP_ACPI_HKEY_MUTE_MASK,
1663 };
1664
1665 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1666 struct tp_nvram_state {
1667 u16 thinkpad_toggle:1;
1668 u16 zoom_toggle:1;
1669 u16 display_toggle:1;
1670 u16 thinklight_toggle:1;
1671 u16 hibernate_toggle:1;
1672 u16 displayexp_toggle:1;
1673 u16 display_state:1;
1674 u16 brightness_toggle:1;
1675 u16 volume_toggle:1;
1676 u16 mute:1;
1677
1678 u8 brightness_level;
1679 u8 volume_level;
1680 };
1681
1682 static struct task_struct *tpacpi_hotkey_task;
1683 static u32 hotkey_source_mask; /* bit mask 0=ACPI,1=NVRAM */
1684 static int hotkey_poll_freq = 10; /* Hz */
1685 static struct mutex hotkey_thread_mutex;
1686 static struct mutex hotkey_thread_data_mutex;
1687 static unsigned int hotkey_config_change;
1688
1689 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1690
1691 #define hotkey_source_mask 0U
1692
1693 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1694
1695 static struct mutex hotkey_mutex;
1696
1697 static enum { /* Reasons for waking up */
1698 TP_ACPI_WAKEUP_NONE = 0, /* None or unknown */
1699 TP_ACPI_WAKEUP_BAYEJ, /* Bay ejection request */
1700 TP_ACPI_WAKEUP_UNDOCK, /* Undock request */
1701 } hotkey_wakeup_reason;
1702
1703 static int hotkey_autosleep_ack;
1704
1705 static u32 hotkey_orig_mask;
1706 static u32 hotkey_all_mask;
1707 static u32 hotkey_reserved_mask;
1708 static u32 hotkey_mask;
1709
1710 static unsigned int hotkey_report_mode;
1711
1712 static u16 *hotkey_keycode_map;
1713
1714 static struct attribute_set *hotkey_dev_attributes;
1715
1716 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1717 #define HOTKEY_CONFIG_CRITICAL_START \
1718 do { \
1719 mutex_lock(&hotkey_thread_data_mutex); \
1720 hotkey_config_change++; \
1721 } while (0);
1722 #define HOTKEY_CONFIG_CRITICAL_END \
1723 mutex_unlock(&hotkey_thread_data_mutex);
1724 #else
1725 #define HOTKEY_CONFIG_CRITICAL_START
1726 #define HOTKEY_CONFIG_CRITICAL_END
1727 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1728
1729 /* HKEY.MHKG() return bits */
1730 #define TP_HOTKEY_TABLET_MASK (1 << 3)
1731
1732 static int hotkey_get_wlsw(void)
1733 {
1734 int status;
1735
1736 if (!tp_features.hotkey_wlsw)
1737 return -ENODEV;
1738
1739 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
1740 if (dbg_wlswemul)
1741 return (tpacpi_wlsw_emulstate) ?
1742 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
1743 #endif
1744
1745 if (!acpi_evalf(hkey_handle, &status, "WLSW", "d"))
1746 return -EIO;
1747
1748 return (status) ? TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
1749 }
1750
1751 static int hotkey_get_tablet_mode(int *status)
1752 {
1753 int s;
1754
1755 if (!acpi_evalf(hkey_handle, &s, "MHKG", "d"))
1756 return -EIO;
1757
1758 *status = ((s & TP_HOTKEY_TABLET_MASK) != 0);
1759 return 0;
1760 }
1761
1762 /*
1763 * Call with hotkey_mutex held
1764 */
1765 static int hotkey_mask_get(void)
1766 {
1767 u32 m = 0;
1768
1769 if (tp_features.hotkey_mask) {
1770 if (!acpi_evalf(hkey_handle, &m, "DHKN", "d"))
1771 return -EIO;
1772 }
1773 hotkey_mask = m | (hotkey_source_mask & hotkey_mask);
1774
1775 return 0;
1776 }
1777
1778 /*
1779 * Call with hotkey_mutex held
1780 */
1781 static int hotkey_mask_set(u32 mask)
1782 {
1783 int i;
1784 int rc = 0;
1785
1786 if (tp_features.hotkey_mask) {
1787 if (!tp_warned.hotkey_mask_ff &&
1788 (mask == 0xffff || mask == 0xffffff ||
1789 mask == 0xffffffff)) {
1790 tp_warned.hotkey_mask_ff = 1;
1791 printk(TPACPI_NOTICE
1792 "setting the hotkey mask to 0x%08x is likely "
1793 "not the best way to go about it\n", mask);
1794 printk(TPACPI_NOTICE
1795 "please consider using the driver defaults, "
1796 "and refer to up-to-date thinkpad-acpi "
1797 "documentation\n");
1798 }
1799
1800 HOTKEY_CONFIG_CRITICAL_START
1801 for (i = 0; i < 32; i++) {
1802 u32 m = 1 << i;
1803 /* enable in firmware mask only keys not in NVRAM
1804 * mode, but enable the key in the cached hotkey_mask
1805 * regardless of mode, or the key will end up
1806 * disabled by hotkey_mask_get() */
1807 if (!acpi_evalf(hkey_handle,
1808 NULL, "MHKM", "vdd", i + 1,
1809 !!((mask & ~hotkey_source_mask) & m))) {
1810 rc = -EIO;
1811 break;
1812 } else {
1813 hotkey_mask = (hotkey_mask & ~m) | (mask & m);
1814 }
1815 }
1816 HOTKEY_CONFIG_CRITICAL_END
1817
1818 /* hotkey_mask_get must be called unconditionally below */
1819 if (!hotkey_mask_get() && !rc &&
1820 (hotkey_mask & ~hotkey_source_mask) !=
1821 (mask & ~hotkey_source_mask)) {
1822 printk(TPACPI_NOTICE
1823 "requested hot key mask 0x%08x, but "
1824 "firmware forced it to 0x%08x\n",
1825 mask, hotkey_mask);
1826 }
1827 } else {
1828 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1829 HOTKEY_CONFIG_CRITICAL_START
1830 hotkey_mask = mask & hotkey_source_mask;
1831 HOTKEY_CONFIG_CRITICAL_END
1832 hotkey_mask_get();
1833 if (hotkey_mask != mask) {
1834 printk(TPACPI_NOTICE
1835 "requested hot key mask 0x%08x, "
1836 "forced to 0x%08x (NVRAM poll mask is "
1837 "0x%08x): no firmware mask support\n",
1838 mask, hotkey_mask, hotkey_source_mask);
1839 }
1840 #else
1841 hotkey_mask_get();
1842 rc = -ENXIO;
1843 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1844 }
1845
1846 return rc;
1847 }
1848
1849 static int hotkey_status_get(int *status)
1850 {
1851 if (!acpi_evalf(hkey_handle, status, "DHKC", "d"))
1852 return -EIO;
1853
1854 return 0;
1855 }
1856
1857 static int hotkey_status_set(bool enable)
1858 {
1859 if (!acpi_evalf(hkey_handle, NULL, "MHKC", "vd", enable ? 1 : 0))
1860 return -EIO;
1861
1862 return 0;
1863 }
1864
1865 static void tpacpi_input_send_tabletsw(void)
1866 {
1867 int state;
1868
1869 if (tp_features.hotkey_tablet &&
1870 !hotkey_get_tablet_mode(&state)) {
1871 mutex_lock(&tpacpi_inputdev_send_mutex);
1872
1873 input_report_switch(tpacpi_inputdev,
1874 SW_TABLET_MODE, !!state);
1875 input_sync(tpacpi_inputdev);
1876
1877 mutex_unlock(&tpacpi_inputdev_send_mutex);
1878 }
1879 }
1880
1881 static void tpacpi_input_send_key(unsigned int scancode)
1882 {
1883 unsigned int keycode;
1884
1885 keycode = hotkey_keycode_map[scancode];
1886
1887 if (keycode != KEY_RESERVED) {
1888 mutex_lock(&tpacpi_inputdev_send_mutex);
1889
1890 input_report_key(tpacpi_inputdev, keycode, 1);
1891 if (keycode == KEY_UNKNOWN)
1892 input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN,
1893 scancode);
1894 input_sync(tpacpi_inputdev);
1895
1896 input_report_key(tpacpi_inputdev, keycode, 0);
1897 if (keycode == KEY_UNKNOWN)
1898 input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN,
1899 scancode);
1900 input_sync(tpacpi_inputdev);
1901
1902 mutex_unlock(&tpacpi_inputdev_send_mutex);
1903 }
1904 }
1905
1906 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1907 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver;
1908
1909 static void tpacpi_hotkey_send_key(unsigned int scancode)
1910 {
1911 tpacpi_input_send_key(scancode);
1912 if (hotkey_report_mode < 2) {
1913 acpi_bus_generate_proc_event(ibm_hotkey_acpidriver.device,
1914 0x80, 0x1001 + scancode);
1915 }
1916 }
1917
1918 static void hotkey_read_nvram(struct tp_nvram_state *n, u32 m)
1919 {
1920 u8 d;
1921
1922 if (m & TP_NVRAM_HKEY_GROUP_HK2) {
1923 d = nvram_read_byte(TP_NVRAM_ADDR_HK2);
1924 n->thinkpad_toggle = !!(d & TP_NVRAM_MASK_HKT_THINKPAD);
1925 n->zoom_toggle = !!(d & TP_NVRAM_MASK_HKT_ZOOM);
1926 n->display_toggle = !!(d & TP_NVRAM_MASK_HKT_DISPLAY);
1927 n->hibernate_toggle = !!(d & TP_NVRAM_MASK_HKT_HIBERNATE);
1928 }
1929 if (m & TP_ACPI_HKEY_THNKLGHT_MASK) {
1930 d = nvram_read_byte(TP_NVRAM_ADDR_THINKLIGHT);
1931 n->thinklight_toggle = !!(d & TP_NVRAM_MASK_THINKLIGHT);
1932 }
1933 if (m & TP_ACPI_HKEY_DISPXPAND_MASK) {
1934 d = nvram_read_byte(TP_NVRAM_ADDR_VIDEO);
1935 n->displayexp_toggle =
1936 !!(d & TP_NVRAM_MASK_HKT_DISPEXPND);
1937 }
1938 if (m & TP_NVRAM_HKEY_GROUP_BRIGHTNESS) {
1939 d = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS);
1940 n->brightness_level = (d & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
1941 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
1942 n->brightness_toggle =
1943 !!(d & TP_NVRAM_MASK_HKT_BRIGHTNESS);
1944 }
1945 if (m & TP_NVRAM_HKEY_GROUP_VOLUME) {
1946 d = nvram_read_byte(TP_NVRAM_ADDR_MIXER);
1947 n->volume_level = (d & TP_NVRAM_MASK_LEVEL_VOLUME)
1948 >> TP_NVRAM_POS_LEVEL_VOLUME;
1949 n->mute = !!(d & TP_NVRAM_MASK_MUTE);
1950 n->volume_toggle = !!(d & TP_NVRAM_MASK_HKT_VOLUME);
1951 }
1952 }
1953
1954 #define TPACPI_COMPARE_KEY(__scancode, __member) \
1955 do { \
1956 if ((mask & (1 << __scancode)) && \
1957 oldn->__member != newn->__member) \
1958 tpacpi_hotkey_send_key(__scancode); \
1959 } while (0)
1960
1961 #define TPACPI_MAY_SEND_KEY(__scancode) \
1962 do { if (mask & (1 << __scancode)) \
1963 tpacpi_hotkey_send_key(__scancode); } while (0)
1964
1965 static void hotkey_compare_and_issue_event(struct tp_nvram_state *oldn,
1966 struct tp_nvram_state *newn,
1967 u32 mask)
1968 {
1969 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_THINKPAD, thinkpad_toggle);
1970 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNSPACE, zoom_toggle);
1971 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF7, display_toggle);
1972 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF12, hibernate_toggle);
1973
1974 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNPAGEUP, thinklight_toggle);
1975
1976 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF8, displayexp_toggle);
1977
1978 /* handle volume */
1979 if (oldn->volume_toggle != newn->volume_toggle) {
1980 if (oldn->mute != newn->mute) {
1981 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE);
1982 }
1983 if (oldn->volume_level > newn->volume_level) {
1984 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
1985 } else if (oldn->volume_level < newn->volume_level) {
1986 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
1987 } else if (oldn->mute == newn->mute) {
1988 /* repeated key presses that didn't change state */
1989 if (newn->mute) {
1990 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE);
1991 } else if (newn->volume_level != 0) {
1992 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
1993 } else {
1994 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
1995 }
1996 }
1997 }
1998
1999 /* handle brightness */
2000 if (oldn->brightness_toggle != newn->brightness_toggle) {
2001 if (oldn->brightness_level < newn->brightness_level) {
2002 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
2003 } else if (oldn->brightness_level > newn->brightness_level) {
2004 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
2005 } else {
2006 /* repeated key presses that didn't change state */
2007 if (newn->brightness_level != 0) {
2008 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
2009 } else {
2010 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
2011 }
2012 }
2013 }
2014 }
2015
2016 #undef TPACPI_COMPARE_KEY
2017 #undef TPACPI_MAY_SEND_KEY
2018
2019 static int hotkey_kthread(void *data)
2020 {
2021 struct tp_nvram_state s[2];
2022 u32 mask;
2023 unsigned int si, so;
2024 unsigned long t;
2025 unsigned int change_detector, must_reset;
2026
2027 mutex_lock(&hotkey_thread_mutex);
2028
2029 if (tpacpi_lifecycle == TPACPI_LIFE_EXITING)
2030 goto exit;
2031
2032 set_freezable();
2033
2034 so = 0;
2035 si = 1;
2036 t = 0;
2037
2038 /* Initial state for compares */
2039 mutex_lock(&hotkey_thread_data_mutex);
2040 change_detector = hotkey_config_change;
2041 mask = hotkey_source_mask & hotkey_mask;
2042 mutex_unlock(&hotkey_thread_data_mutex);
2043 hotkey_read_nvram(&s[so], mask);
2044
2045 while (!kthread_should_stop() && hotkey_poll_freq) {
2046 if (t == 0)
2047 t = 1000/hotkey_poll_freq;
2048 t = msleep_interruptible(t);
2049 if (unlikely(kthread_should_stop()))
2050 break;
2051 must_reset = try_to_freeze();
2052 if (t > 0 && !must_reset)
2053 continue;
2054
2055 mutex_lock(&hotkey_thread_data_mutex);
2056 if (must_reset || hotkey_config_change != change_detector) {
2057 /* forget old state on thaw or config change */
2058 si = so;
2059 t = 0;
2060 change_detector = hotkey_config_change;
2061 }
2062 mask = hotkey_source_mask & hotkey_mask;
2063 mutex_unlock(&hotkey_thread_data_mutex);
2064
2065 if (likely(mask)) {
2066 hotkey_read_nvram(&s[si], mask);
2067 if (likely(si != so)) {
2068 hotkey_compare_and_issue_event(&s[so], &s[si],
2069 mask);
2070 }
2071 }
2072
2073 so = si;
2074 si ^= 1;
2075 }
2076
2077 exit:
2078 mutex_unlock(&hotkey_thread_mutex);
2079 return 0;
2080 }
2081
2082 static void hotkey_poll_stop_sync(void)
2083 {
2084 if (tpacpi_hotkey_task) {
2085 if (frozen(tpacpi_hotkey_task) ||
2086 freezing(tpacpi_hotkey_task))
2087 thaw_process(tpacpi_hotkey_task);
2088
2089 kthread_stop(tpacpi_hotkey_task);
2090 tpacpi_hotkey_task = NULL;
2091 mutex_lock(&hotkey_thread_mutex);
2092 /* at this point, the thread did exit */
2093 mutex_unlock(&hotkey_thread_mutex);
2094 }
2095 }
2096
2097 /* call with hotkey_mutex held */
2098 static void hotkey_poll_setup(int may_warn)
2099 {
2100 if ((hotkey_source_mask & hotkey_mask) != 0 &&
2101 hotkey_poll_freq > 0 &&
2102 (tpacpi_inputdev->users > 0 || hotkey_report_mode < 2)) {
2103 if (!tpacpi_hotkey_task) {
2104 tpacpi_hotkey_task = kthread_run(hotkey_kthread,
2105 NULL, TPACPI_NVRAM_KTHREAD_NAME);
2106 if (IS_ERR(tpacpi_hotkey_task)) {
2107 tpacpi_hotkey_task = NULL;
2108 printk(TPACPI_ERR
2109 "could not create kernel thread "
2110 "for hotkey polling\n");
2111 }
2112 }
2113 } else {
2114 hotkey_poll_stop_sync();
2115 if (may_warn &&
2116 hotkey_source_mask != 0 && hotkey_poll_freq == 0) {
2117 printk(TPACPI_NOTICE
2118 "hot keys 0x%08x require polling, "
2119 "which is currently disabled\n",
2120 hotkey_source_mask);
2121 }
2122 }
2123 }
2124
2125 static void hotkey_poll_setup_safe(int may_warn)
2126 {
2127 mutex_lock(&hotkey_mutex);
2128 hotkey_poll_setup(may_warn);
2129 mutex_unlock(&hotkey_mutex);
2130 }
2131
2132 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2133
2134 static void hotkey_poll_setup_safe(int __unused)
2135 {
2136 }
2137
2138 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2139
2140 static int hotkey_inputdev_open(struct input_dev *dev)
2141 {
2142 switch (tpacpi_lifecycle) {
2143 case TPACPI_LIFE_INIT:
2144 /*
2145 * hotkey_init will call hotkey_poll_setup_safe
2146 * at the appropriate moment
2147 */
2148 return 0;
2149 case TPACPI_LIFE_EXITING:
2150 return -EBUSY;
2151 case TPACPI_LIFE_RUNNING:
2152 hotkey_poll_setup_safe(0);
2153 return 0;
2154 }
2155
2156 /* Should only happen if tpacpi_lifecycle is corrupt */
2157 BUG();
2158 return -EBUSY;
2159 }
2160
2161 static void hotkey_inputdev_close(struct input_dev *dev)
2162 {
2163 /* disable hotkey polling when possible */
2164 if (tpacpi_lifecycle == TPACPI_LIFE_RUNNING)
2165 hotkey_poll_setup_safe(0);
2166 }
2167
2168 /* sysfs hotkey enable ------------------------------------------------- */
2169 static ssize_t hotkey_enable_show(struct device *dev,
2170 struct device_attribute *attr,
2171 char *buf)
2172 {
2173 int res, status;
2174
2175 printk_deprecated_attribute("hotkey_enable",
2176 "Hotkey reporting is always enabled");
2177
2178 res = hotkey_status_get(&status);
2179 if (res)
2180 return res;
2181
2182 return snprintf(buf, PAGE_SIZE, "%d\n", status);
2183 }
2184
2185 static ssize_t hotkey_enable_store(struct device *dev,
2186 struct device_attribute *attr,
2187 const char *buf, size_t count)
2188 {
2189 unsigned long t;
2190
2191 printk_deprecated_attribute("hotkey_enable",
2192 "Hotkeys can be disabled through hotkey_mask");
2193
2194 if (parse_strtoul(buf, 1, &t))
2195 return -EINVAL;
2196
2197 if (t == 0)
2198 return -EPERM;
2199
2200 return count;
2201 }
2202
2203 static struct device_attribute dev_attr_hotkey_enable =
2204 __ATTR(hotkey_enable, S_IWUSR | S_IRUGO,
2205 hotkey_enable_show, hotkey_enable_store);
2206
2207 /* sysfs hotkey mask --------------------------------------------------- */
2208 static ssize_t hotkey_mask_show(struct device *dev,
2209 struct device_attribute *attr,
2210 char *buf)
2211 {
2212 int res;
2213
2214 if (mutex_lock_killable(&hotkey_mutex))
2215 return -ERESTARTSYS;
2216 res = hotkey_mask_get();
2217 mutex_unlock(&hotkey_mutex);
2218
2219 return (res)?
2220 res : snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_mask);
2221 }
2222
2223 static ssize_t hotkey_mask_store(struct device *dev,
2224 struct device_attribute *attr,
2225 const char *buf, size_t count)
2226 {
2227 unsigned long t;
2228 int res;
2229
2230 if (parse_strtoul(buf, 0xffffffffUL, &t))
2231 return -EINVAL;
2232
2233 if (mutex_lock_killable(&hotkey_mutex))
2234 return -ERESTARTSYS;
2235
2236 res = hotkey_mask_set(t);
2237
2238 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2239 hotkey_poll_setup(1);
2240 #endif
2241
2242 mutex_unlock(&hotkey_mutex);
2243
2244 tpacpi_disclose_usertask("hotkey_mask", "set to 0x%08lx\n", t);
2245
2246 return (res) ? res : count;
2247 }
2248
2249 static struct device_attribute dev_attr_hotkey_mask =
2250 __ATTR(hotkey_mask, S_IWUSR | S_IRUGO,
2251 hotkey_mask_show, hotkey_mask_store);
2252
2253 /* sysfs hotkey bios_enabled ------------------------------------------- */
2254 static ssize_t hotkey_bios_enabled_show(struct device *dev,
2255 struct device_attribute *attr,
2256 char *buf)
2257 {
2258 return sprintf(buf, "0\n");
2259 }
2260
2261 static struct device_attribute dev_attr_hotkey_bios_enabled =
2262 __ATTR(hotkey_bios_enabled, S_IRUGO, hotkey_bios_enabled_show, NULL);
2263
2264 /* sysfs hotkey bios_mask ---------------------------------------------- */
2265 static ssize_t hotkey_bios_mask_show(struct device *dev,
2266 struct device_attribute *attr,
2267 char *buf)
2268 {
2269 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_orig_mask);
2270 }
2271
2272 static struct device_attribute dev_attr_hotkey_bios_mask =
2273 __ATTR(hotkey_bios_mask, S_IRUGO, hotkey_bios_mask_show, NULL);
2274
2275 /* sysfs hotkey all_mask ----------------------------------------------- */
2276 static ssize_t hotkey_all_mask_show(struct device *dev,
2277 struct device_attribute *attr,
2278 char *buf)
2279 {
2280 return snprintf(buf, PAGE_SIZE, "0x%08x\n",
2281 hotkey_all_mask | hotkey_source_mask);
2282 }
2283
2284 static struct device_attribute dev_attr_hotkey_all_mask =
2285 __ATTR(hotkey_all_mask, S_IRUGO, hotkey_all_mask_show, NULL);
2286
2287 /* sysfs hotkey recommended_mask --------------------------------------- */
2288 static ssize_t hotkey_recommended_mask_show(struct device *dev,
2289 struct device_attribute *attr,
2290 char *buf)
2291 {
2292 return snprintf(buf, PAGE_SIZE, "0x%08x\n",
2293 (hotkey_all_mask | hotkey_source_mask)
2294 & ~hotkey_reserved_mask);
2295 }
2296
2297 static struct device_attribute dev_attr_hotkey_recommended_mask =
2298 __ATTR(hotkey_recommended_mask, S_IRUGO,
2299 hotkey_recommended_mask_show, NULL);
2300
2301 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2302
2303 /* sysfs hotkey hotkey_source_mask ------------------------------------- */
2304 static ssize_t hotkey_source_mask_show(struct device *dev,
2305 struct device_attribute *attr,
2306 char *buf)
2307 {
2308 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_source_mask);
2309 }
2310
2311 static ssize_t hotkey_source_mask_store(struct device *dev,
2312 struct device_attribute *attr,
2313 const char *buf, size_t count)
2314 {
2315 unsigned long t;
2316
2317 if (parse_strtoul(buf, 0xffffffffUL, &t) ||
2318 ((t & ~TPACPI_HKEY_NVRAM_KNOWN_MASK) != 0))
2319 return -EINVAL;
2320
2321 if (mutex_lock_killable(&hotkey_mutex))
2322 return -ERESTARTSYS;
2323
2324 HOTKEY_CONFIG_CRITICAL_START
2325 hotkey_source_mask = t;
2326 HOTKEY_CONFIG_CRITICAL_END
2327
2328 hotkey_poll_setup(1);
2329
2330 mutex_unlock(&hotkey_mutex);
2331
2332 tpacpi_disclose_usertask("hotkey_source_mask", "set to 0x%08lx\n", t);
2333
2334 return count;
2335 }
2336
2337 static struct device_attribute dev_attr_hotkey_source_mask =
2338 __ATTR(hotkey_source_mask, S_IWUSR | S_IRUGO,
2339 hotkey_source_mask_show, hotkey_source_mask_store);
2340
2341 /* sysfs hotkey hotkey_poll_freq --------------------------------------- */
2342 static ssize_t hotkey_poll_freq_show(struct device *dev,
2343 struct device_attribute *attr,
2344 char *buf)
2345 {
2346 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_poll_freq);
2347 }
2348
2349 static ssize_t hotkey_poll_freq_store(struct device *dev,
2350 struct device_attribute *attr,
2351 const char *buf, size_t count)
2352 {
2353 unsigned long t;
2354
2355 if (parse_strtoul(buf, 25, &t))
2356 return -EINVAL;
2357
2358 if (mutex_lock_killable(&hotkey_mutex))
2359 return -ERESTARTSYS;
2360
2361 hotkey_poll_freq = t;
2362
2363 hotkey_poll_setup(1);
2364 mutex_unlock(&hotkey_mutex);
2365
2366 tpacpi_disclose_usertask("hotkey_poll_freq", "set to %lu\n", t);
2367
2368 return count;
2369 }
2370
2371 static struct device_attribute dev_attr_hotkey_poll_freq =
2372 __ATTR(hotkey_poll_freq, S_IWUSR | S_IRUGO,
2373 hotkey_poll_freq_show, hotkey_poll_freq_store);
2374
2375 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2376
2377 /* sysfs hotkey radio_sw (pollable) ------------------------------------ */
2378 static ssize_t hotkey_radio_sw_show(struct device *dev,
2379 struct device_attribute *attr,
2380 char *buf)
2381 {
2382 int res;
2383 res = hotkey_get_wlsw();
2384 if (res < 0)
2385 return res;
2386
2387 /* Opportunistic update */
2388 tpacpi_rfk_update_hwblock_state((res == TPACPI_RFK_RADIO_OFF));
2389
2390 return snprintf(buf, PAGE_SIZE, "%d\n",
2391 (res == TPACPI_RFK_RADIO_OFF) ? 0 : 1);
2392 }
2393
2394 static struct device_attribute dev_attr_hotkey_radio_sw =
2395 __ATTR(hotkey_radio_sw, S_IRUGO, hotkey_radio_sw_show, NULL);
2396
2397 static void hotkey_radio_sw_notify_change(void)
2398 {
2399 if (tp_features.hotkey_wlsw)
2400 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2401 "hotkey_radio_sw");
2402 }
2403
2404 /* sysfs hotkey tablet mode (pollable) --------------------------------- */
2405 static ssize_t hotkey_tablet_mode_show(struct device *dev,
2406 struct device_attribute *attr,
2407 char *buf)
2408 {
2409 int res, s;
2410 res = hotkey_get_tablet_mode(&s);
2411 if (res < 0)
2412 return res;
2413
2414 return snprintf(buf, PAGE_SIZE, "%d\n", !!s);
2415 }
2416
2417 static struct device_attribute dev_attr_hotkey_tablet_mode =
2418 __ATTR(hotkey_tablet_mode, S_IRUGO, hotkey_tablet_mode_show, NULL);
2419
2420 static void hotkey_tablet_mode_notify_change(void)
2421 {
2422 if (tp_features.hotkey_tablet)
2423 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2424 "hotkey_tablet_mode");
2425 }
2426
2427 /* sysfs hotkey report_mode -------------------------------------------- */
2428 static ssize_t hotkey_report_mode_show(struct device *dev,
2429 struct device_attribute *attr,
2430 char *buf)
2431 {
2432 return snprintf(buf, PAGE_SIZE, "%d\n",
2433 (hotkey_report_mode != 0) ? hotkey_report_mode : 1);
2434 }
2435
2436 static struct device_attribute dev_attr_hotkey_report_mode =
2437 __ATTR(hotkey_report_mode, S_IRUGO, hotkey_report_mode_show, NULL);
2438
2439 /* sysfs wakeup reason (pollable) -------------------------------------- */
2440 static ssize_t hotkey_wakeup_reason_show(struct device *dev,
2441 struct device_attribute *attr,
2442 char *buf)
2443 {
2444 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_wakeup_reason);
2445 }
2446
2447 static struct device_attribute dev_attr_hotkey_wakeup_reason =
2448 __ATTR(wakeup_reason, S_IRUGO, hotkey_wakeup_reason_show, NULL);
2449
2450 static void hotkey_wakeup_reason_notify_change(void)
2451 {
2452 if (tp_features.hotkey_mask)
2453 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2454 "wakeup_reason");
2455 }
2456
2457 /* sysfs wakeup hotunplug_complete (pollable) -------------------------- */
2458 static ssize_t hotkey_wakeup_hotunplug_complete_show(struct device *dev,
2459 struct device_attribute *attr,
2460 char *buf)
2461 {
2462 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_autosleep_ack);
2463 }
2464
2465 static struct device_attribute dev_attr_hotkey_wakeup_hotunplug_complete =
2466 __ATTR(wakeup_hotunplug_complete, S_IRUGO,
2467 hotkey_wakeup_hotunplug_complete_show, NULL);
2468
2469 static void hotkey_wakeup_hotunplug_complete_notify_change(void)
2470 {
2471 if (tp_features.hotkey_mask)
2472 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2473 "wakeup_hotunplug_complete");
2474 }
2475
2476 /* --------------------------------------------------------------------- */
2477
2478 static struct attribute *hotkey_attributes[] __initdata = {
2479 &dev_attr_hotkey_enable.attr,
2480 &dev_attr_hotkey_bios_enabled.attr,
2481 &dev_attr_hotkey_report_mode.attr,
2482 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2483 &dev_attr_hotkey_mask.attr,
2484 &dev_attr_hotkey_all_mask.attr,
2485 &dev_attr_hotkey_recommended_mask.attr,
2486 &dev_attr_hotkey_source_mask.attr,
2487 &dev_attr_hotkey_poll_freq.attr,
2488 #endif
2489 };
2490
2491 static struct attribute *hotkey_mask_attributes[] __initdata = {
2492 &dev_attr_hotkey_bios_mask.attr,
2493 #ifndef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2494 &dev_attr_hotkey_mask.attr,
2495 &dev_attr_hotkey_all_mask.attr,
2496 &dev_attr_hotkey_recommended_mask.attr,
2497 #endif
2498 &dev_attr_hotkey_wakeup_reason.attr,
2499 &dev_attr_hotkey_wakeup_hotunplug_complete.attr,
2500 };
2501
2502 /*
2503 * Sync both the hw and sw blocking state of all switches
2504 */
2505 static void tpacpi_send_radiosw_update(void)
2506 {
2507 int wlsw;
2508
2509 /*
2510 * We must sync all rfkill controllers *before* issuing any
2511 * rfkill input events, or we will race the rfkill core input
2512 * handler.
2513 *
2514 * tpacpi_inputdev_send_mutex works as a syncronization point
2515 * for the above.
2516 *
2517 * We optimize to avoid numerous calls to hotkey_get_wlsw.
2518 */
2519
2520 wlsw = hotkey_get_wlsw();
2521
2522 /* Sync hw blocking state first if it is hw-blocked */
2523 if (wlsw == TPACPI_RFK_RADIO_OFF)
2524 tpacpi_rfk_update_hwblock_state(true);
2525
2526 /* Sync sw blocking state */
2527 tpacpi_rfk_update_swstate_all();
2528
2529 /* Sync hw blocking state last if it is hw-unblocked */
2530 if (wlsw == TPACPI_RFK_RADIO_ON)
2531 tpacpi_rfk_update_hwblock_state(false);
2532
2533 /* Issue rfkill input event for WLSW switch */
2534 if (!(wlsw < 0)) {
2535 mutex_lock(&tpacpi_inputdev_send_mutex);
2536
2537 input_report_switch(tpacpi_inputdev,
2538 SW_RFKILL_ALL, (wlsw > 0));
2539 input_sync(tpacpi_inputdev);
2540
2541 mutex_unlock(&tpacpi_inputdev_send_mutex);
2542 }
2543
2544 /*
2545 * this can be unconditional, as we will poll state again
2546 * if userspace uses the notify to read data
2547 */
2548 hotkey_radio_sw_notify_change();
2549 }
2550
2551 static void hotkey_exit(void)
2552 {
2553 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2554 hotkey_poll_stop_sync();
2555 #endif
2556
2557 if (hotkey_dev_attributes)
2558 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
2559
2560 kfree(hotkey_keycode_map);
2561
2562 if (tp_features.hotkey) {
2563 dbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_HKEY,
2564 "restoring original hot key mask\n");
2565 /* no short-circuit boolean operator below! */
2566 if ((hotkey_mask_set(hotkey_orig_mask) |
2567 hotkey_status_set(false)) != 0)
2568 printk(TPACPI_ERR
2569 "failed to restore hot key mask "
2570 "to BIOS defaults\n");
2571 }
2572 }
2573
2574 static int __init hotkey_init(struct ibm_init_struct *iibm)
2575 {
2576 /* Requirements for changing the default keymaps:
2577 *
2578 * 1. Many of the keys are mapped to KEY_RESERVED for very
2579 * good reasons. Do not change them unless you have deep
2580 * knowledge on the IBM and Lenovo ThinkPad firmware for
2581 * the various ThinkPad models. The driver behaves
2582 * differently for KEY_RESERVED: such keys have their
2583 * hot key mask *unset* in mask_recommended, and also
2584 * in the initial hot key mask programmed into the
2585 * firmware at driver load time, which means the firm-
2586 * ware may react very differently if you change them to
2587 * something else;
2588 *
2589 * 2. You must be subscribed to the linux-thinkpad and
2590 * ibm-acpi-devel mailing lists, and you should read the
2591 * list archives since 2007 if you want to change the
2592 * keymaps. This requirement exists so that you will
2593 * know the past history of problems with the thinkpad-
2594 * acpi driver keymaps, and also that you will be
2595 * listening to any bug reports;
2596 *
2597 * 3. Do not send thinkpad-acpi specific patches directly to
2598 * for merging, *ever*. Send them to the linux-acpi
2599 * mailinglist for comments. Merging is to be done only
2600 * through acpi-test and the ACPI maintainer.
2601 *
2602 * If the above is too much to ask, don't change the keymap.
2603 * Ask the thinkpad-acpi maintainer to do it, instead.
2604 */
2605 static u16 ibm_keycode_map[] __initdata = {
2606 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
2607 KEY_FN_F1, KEY_FN_F2, KEY_COFFEE, KEY_SLEEP,
2608 KEY_WLAN, KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
2609 KEY_FN_F9, KEY_FN_F10, KEY_FN_F11, KEY_SUSPEND,
2610
2611 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
2612 KEY_UNKNOWN, /* 0x0C: FN+BACKSPACE */
2613 KEY_UNKNOWN, /* 0x0D: FN+INSERT */
2614 KEY_UNKNOWN, /* 0x0E: FN+DELETE */
2615
2616 /* brightness: firmware always reacts to them, unless
2617 * X.org did some tricks in the radeon BIOS scratch
2618 * registers of *some* models */
2619 KEY_RESERVED, /* 0x0F: FN+HOME (brightness up) */
2620 KEY_RESERVED, /* 0x10: FN+END (brightness down) */
2621
2622 /* Thinklight: firmware always react to it */
2623 KEY_RESERVED, /* 0x11: FN+PGUP (thinklight toggle) */
2624
2625 KEY_UNKNOWN, /* 0x12: FN+PGDOWN */
2626 KEY_ZOOM, /* 0x13: FN+SPACE (zoom) */
2627
2628 /* Volume: firmware always react to it and reprograms
2629 * the built-in *extra* mixer. Never map it to control
2630 * another mixer by default. */
2631 KEY_RESERVED, /* 0x14: VOLUME UP */
2632 KEY_RESERVED, /* 0x15: VOLUME DOWN */
2633 KEY_RESERVED, /* 0x16: MUTE */
2634
2635 KEY_VENDOR, /* 0x17: Thinkpad/AccessIBM/Lenovo */
2636
2637 /* (assignments unknown, please report if found) */
2638 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
2639 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
2640 };
2641 static u16 lenovo_keycode_map[] __initdata = {
2642 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
2643 KEY_FN_F1, KEY_COFFEE, KEY_BATTERY, KEY_SLEEP,
2644 KEY_WLAN, KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
2645 KEY_FN_F9, KEY_FN_F10, KEY_FN_F11, KEY_SUSPEND,
2646
2647 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
2648 KEY_UNKNOWN, /* 0x0C: FN+BACKSPACE */
2649 KEY_UNKNOWN, /* 0x0D: FN+INSERT */
2650 KEY_UNKNOWN, /* 0x0E: FN+DELETE */
2651
2652 /* These either have to go through ACPI video, or
2653 * act like in the IBM ThinkPads, so don't ever
2654 * enable them by default */
2655 KEY_RESERVED, /* 0x0F: FN+HOME (brightness up) */
2656 KEY_RESERVED, /* 0x10: FN+END (brightness down) */
2657
2658 KEY_RESERVED, /* 0x11: FN+PGUP (thinklight toggle) */
2659
2660 KEY_UNKNOWN, /* 0x12: FN+PGDOWN */
2661 KEY_ZOOM, /* 0x13: FN+SPACE (zoom) */
2662
2663 /* Volume: z60/z61, T60 (BIOS version?): firmware always
2664 * react to it and reprograms the built-in *extra* mixer.
2665 * Never map it to control another mixer by default.
2666 *
2667 * T60?, T61, R60?, R61: firmware and EC tries to send
2668 * these over the regular keyboard, so these are no-ops,
2669 * but there are still weird bugs re. MUTE, so do not
2670 * change unless you get test reports from all Lenovo
2671 * models. May cause the BIOS to interfere with the
2672 * HDA mixer.
2673 */
2674 KEY_RESERVED, /* 0x14: VOLUME UP */
2675 KEY_RESERVED, /* 0x15: VOLUME DOWN */
2676 KEY_RESERVED, /* 0x16: MUTE */
2677
2678 KEY_VENDOR, /* 0x17: Thinkpad/AccessIBM/Lenovo */
2679
2680 /* (assignments unknown, please report if found) */
2681 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
2682 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
2683 };
2684
2685 #define TPACPI_HOTKEY_MAP_LEN ARRAY_SIZE(ibm_keycode_map)
2686 #define TPACPI_HOTKEY_MAP_SIZE sizeof(ibm_keycode_map)
2687 #define TPACPI_HOTKEY_MAP_TYPESIZE sizeof(ibm_keycode_map[0])
2688
2689 int res, i;
2690 int status;
2691 int hkeyv;
2692
2693 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
2694 "initializing hotkey subdriver\n");
2695
2696 BUG_ON(!tpacpi_inputdev);
2697 BUG_ON(tpacpi_inputdev->open != NULL ||
2698 tpacpi_inputdev->close != NULL);
2699
2700 TPACPI_ACPIHANDLE_INIT(hkey);
2701 mutex_init(&hotkey_mutex);
2702
2703 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2704 mutex_init(&hotkey_thread_mutex);
2705 mutex_init(&hotkey_thread_data_mutex);
2706 #endif
2707
2708 /* hotkey not supported on 570 */
2709 tp_features.hotkey = hkey_handle != NULL;
2710
2711 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
2712 "hotkeys are %s\n",
2713 str_supported(tp_features.hotkey));
2714
2715 if (!tp_features.hotkey)
2716 return 1;
2717
2718 tpacpi_disable_brightness_delay();
2719
2720 hotkey_dev_attributes = create_attr_set(13, NULL);
2721 if (!hotkey_dev_attributes)
2722 return -ENOMEM;
2723 res = add_many_to_attr_set(hotkey_dev_attributes,
2724 hotkey_attributes,
2725 ARRAY_SIZE(hotkey_attributes));
2726 if (res)
2727 goto err_exit;
2728
2729 /* mask not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
2730 A30, R30, R31, T20-22, X20-21, X22-24. Detected by checking
2731 for HKEY interface version 0x100 */
2732 if (acpi_evalf(hkey_handle, &hkeyv, "MHKV", "qd")) {
2733 if ((hkeyv >> 8) != 1) {
2734 printk(TPACPI_ERR "unknown version of the "
2735 "HKEY interface: 0x%x\n", hkeyv);
2736 printk(TPACPI_ERR "please report this to %s\n",
2737 TPACPI_MAIL);
2738 } else {
2739 /*
2740 * MHKV 0x100 in A31, R40, R40e,
2741 * T4x, X31, and later
2742 */
2743 tp_features.hotkey_mask = 1;
2744 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
2745 "firmware HKEY interface version: 0x%x\n",
2746 hkeyv);
2747 }
2748 }
2749
2750 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
2751 "hotkey masks are %s\n",
2752 str_supported(tp_features.hotkey_mask));
2753
2754 if (tp_features.hotkey_mask) {
2755 if (!acpi_evalf(hkey_handle, &hotkey_all_mask,
2756 "MHKA", "qd")) {
2757 printk(TPACPI_ERR
2758 "missing MHKA handler, "
2759 "please report this to %s\n",
2760 TPACPI_MAIL);
2761 /* FN+F12, FN+F4, FN+F3 */
2762 hotkey_all_mask = 0x080cU;
2763 }
2764 }
2765
2766 /* hotkey_source_mask *must* be zero for
2767 * the first hotkey_mask_get */
2768 if (tp_features.hotkey_mask) {
2769 res = hotkey_mask_get();
2770 if (res)
2771 goto err_exit;
2772
2773 hotkey_orig_mask = hotkey_mask;
2774 res = add_many_to_attr_set(
2775 hotkey_dev_attributes,
2776 hotkey_mask_attributes,
2777 ARRAY_SIZE(hotkey_mask_attributes));
2778 if (res)
2779 goto err_exit;
2780 }
2781
2782 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2783 if (tp_features.hotkey_mask) {
2784 hotkey_source_mask = TPACPI_HKEY_NVRAM_GOOD_MASK
2785 & ~hotkey_all_mask;
2786 } else {
2787 hotkey_source_mask = TPACPI_HKEY_NVRAM_GOOD_MASK;
2788 }
2789
2790 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
2791 "hotkey source mask 0x%08x, polling freq %d\n",
2792 hotkey_source_mask, hotkey_poll_freq);
2793 #endif
2794
2795 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
2796 if (dbg_wlswemul) {
2797 tp_features.hotkey_wlsw = 1;
2798 printk(TPACPI_INFO
2799 "radio switch emulation enabled\n");
2800 } else
2801 #endif
2802 /* Not all thinkpads have a hardware radio switch */
2803 if (acpi_evalf(hkey_handle, &status, "WLSW", "qd")) {
2804 tp_features.hotkey_wlsw = 1;
2805 printk(TPACPI_INFO
2806 "radio switch found; radios are %s\n",
2807 enabled(status, 0));
2808 }
2809 if (tp_features.hotkey_wlsw)
2810 res = add_to_attr_set(hotkey_dev_attributes,
2811 &dev_attr_hotkey_radio_sw.attr);
2812
2813 /* For X41t, X60t, X61t Tablets... */
2814 if (!res && acpi_evalf(hkey_handle, &status, "MHKG", "qd")) {
2815 tp_features.hotkey_tablet = 1;
2816 printk(TPACPI_INFO
2817 "possible tablet mode switch found; "
2818 "ThinkPad in %s mode\n",
2819 (status & TP_HOTKEY_TABLET_MASK)?
2820 "tablet" : "laptop");
2821 res = add_to_attr_set(hotkey_dev_attributes,
2822 &dev_attr_hotkey_tablet_mode.attr);
2823 }
2824
2825 if (!res)
2826 res = register_attr_set_with_sysfs(
2827 hotkey_dev_attributes,
2828 &tpacpi_pdev->dev.kobj);
2829 if (res)
2830 goto err_exit;
2831
2832 /* Set up key map */
2833
2834 hotkey_keycode_map = kmalloc(TPACPI_HOTKEY_MAP_SIZE,
2835 GFP_KERNEL);
2836 if (!hotkey_keycode_map) {
2837 printk(TPACPI_ERR
2838 "failed to allocate memory for key map\n");
2839 res = -ENOMEM;
2840 goto err_exit;
2841 }
2842
2843 if (thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO) {
2844 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
2845 "using Lenovo default hot key map\n");
2846 memcpy(hotkey_keycode_map, &lenovo_keycode_map,
2847 TPACPI_HOTKEY_MAP_SIZE);
2848 } else {
2849 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
2850 "using IBM default hot key map\n");
2851 memcpy(hotkey_keycode_map, &ibm_keycode_map,
2852 TPACPI_HOTKEY_MAP_SIZE);
2853 }
2854
2855 set_bit(EV_KEY, tpacpi_inputdev->evbit);
2856 set_bit(EV_MSC, tpacpi_inputdev->evbit);
2857 set_bit(MSC_SCAN, tpacpi_inputdev->mscbit);
2858 tpacpi_inputdev->keycodesize = TPACPI_HOTKEY_MAP_TYPESIZE;
2859 tpacpi_inputdev->keycodemax = TPACPI_HOTKEY_MAP_LEN;
2860 tpacpi_inputdev->keycode = hotkey_keycode_map;
2861 for (i = 0; i < TPACPI_HOTKEY_MAP_LEN; i++) {
2862 if (hotkey_keycode_map[i] != KEY_RESERVED) {
2863 set_bit(hotkey_keycode_map[i],
2864 tpacpi_inputdev->keybit);
2865 } else {
2866 if (i < sizeof(hotkey_reserved_mask)*8)
2867 hotkey_reserved_mask |= 1 << i;
2868 }
2869 }
2870
2871 if (tp_features.hotkey_wlsw) {
2872 set_bit(EV_SW, tpacpi_inputdev->evbit);
2873 set_bit(SW_RFKILL_ALL, tpacpi_inputdev->swbit);
2874 }
2875 if (tp_features.hotkey_tablet) {
2876 set_bit(EV_SW, tpacpi_inputdev->evbit);
2877 set_bit(SW_TABLET_MODE, tpacpi_inputdev->swbit);
2878 }
2879
2880 /* Do not issue duplicate brightness change events to
2881 * userspace */
2882 if (!tp_features.bright_acpimode)
2883 /* update bright_acpimode... */
2884 tpacpi_check_std_acpi_brightness_support();
2885
2886 if (tp_features.bright_acpimode) {
2887 printk(TPACPI_INFO
2888 "This ThinkPad has standard ACPI backlight "
2889 "brightness control, supported by the ACPI "
2890 "video driver\n");
2891 printk(TPACPI_NOTICE
2892 "Disabling thinkpad-acpi brightness events "
2893 "by default...\n");
2894
2895 /* The hotkey_reserved_mask change below is not
2896 * necessary while the keys are at KEY_RESERVED in the
2897 * default map, but better safe than sorry, leave it
2898 * here as a marker of what we have to do, especially
2899 * when we finally become able to set this at runtime
2900 * on response to X.org requests */
2901 hotkey_reserved_mask |=
2902 (1 << TP_ACPI_HOTKEYSCAN_FNHOME)
2903 | (1 << TP_ACPI_HOTKEYSCAN_FNEND);
2904 }
2905
2906 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
2907 "enabling firmware HKEY event interface...\n");
2908 res = hotkey_status_set(true);
2909 if (res) {
2910 hotkey_exit();
2911 return res;
2912 }
2913 res = hotkey_mask_set(((hotkey_all_mask | hotkey_source_mask)
2914 & ~hotkey_reserved_mask)
2915 | hotkey_orig_mask);
2916 if (res < 0 && res != -ENXIO) {
2917 hotkey_exit();
2918 return res;
2919 }
2920
2921 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
2922 "legacy ibm/hotkey event reporting over procfs %s\n",
2923 (hotkey_report_mode < 2) ?
2924 "enabled" : "disabled");
2925
2926 tpacpi_inputdev->open = &hotkey_inputdev_open;
2927 tpacpi_inputdev->close = &hotkey_inputdev_close;
2928
2929 hotkey_poll_setup_safe(1);
2930 tpacpi_send_radiosw_update();
2931 tpacpi_input_send_tabletsw();
2932
2933 return 0;
2934
2935 err_exit:
2936 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
2937 hotkey_dev_attributes = NULL;
2938
2939 return (res < 0)? res : 1;
2940 }
2941
2942 static bool hotkey_notify_hotkey(const u32 hkey,
2943 bool *send_acpi_ev,
2944 bool *ignore_acpi_ev)
2945 {
2946 /* 0x1000-0x1FFF: key presses */
2947 unsigned int scancode = hkey & 0xfff;
2948 *send_acpi_ev = true;
2949 *ignore_acpi_ev = false;
2950
2951 if (scancode > 0 && scancode < 0x21) {
2952 scancode--;
2953 if (!(hotkey_source_mask & (1 << scancode))) {
2954 tpacpi_input_send_key(scancode);
2955 *send_acpi_ev = false;
2956 } else {
2957 *ignore_acpi_ev = true;
2958 }
2959 return true;
2960 }
2961 return false;
2962 }
2963
2964 static bool hotkey_notify_wakeup(const u32 hkey,
2965 bool *send_acpi_ev,
2966 bool *ignore_acpi_ev)
2967 {
2968 /* 0x2000-0x2FFF: Wakeup reason */
2969 *send_acpi_ev = true;
2970 *ignore_acpi_ev = false;
2971
2972 switch (hkey) {
2973 case 0x2304: /* suspend, undock */
2974 case 0x2404: /* hibernation, undock */
2975 hotkey_wakeup_reason = TP_ACPI_WAKEUP_UNDOCK;
2976 *ignore_acpi_ev = true;
2977 break;
2978
2979 case 0x2305: /* suspend, bay eject */
2980 case 0x2405: /* hibernation, bay eject */
2981 hotkey_wakeup_reason = TP_ACPI_WAKEUP_BAYEJ;
2982 *ignore_acpi_ev = true;
2983 break;
2984
2985 case 0x2313: /* Battery on critical low level (S3) */
2986 case 0x2413: /* Battery on critical low level (S4) */
2987 printk(TPACPI_ALERT
2988 "EMERGENCY WAKEUP: battery almost empty\n");
2989 /* how to auto-heal: */
2990 /* 2313: woke up from S3, go to S4/S5 */
2991 /* 2413: woke up from S4, go to S5 */
2992 break;
2993
2994 default:
2995 return false;
2996 }
2997
2998 if (hotkey_wakeup_reason != TP_ACPI_WAKEUP_NONE) {
2999 printk(TPACPI_INFO
3000 "woke up due to a hot-unplug "
3001 "request...\n");
3002 hotkey_wakeup_reason_notify_change();
3003 }
3004 return true;
3005 }
3006
3007 static bool hotkey_notify_usrevent(const u32 hkey,
3008 bool *send_acpi_ev,
3009 bool *ignore_acpi_ev)
3010 {
3011 /* 0x5000-0x5FFF: human interface helpers */
3012 *send_acpi_ev = true;
3013 *ignore_acpi_ev = false;
3014
3015 switch (hkey) {
3016 case 0x5010: /* Lenovo new BIOS: brightness changed */
3017 case 0x500b: /* X61t: tablet pen inserted into bay */
3018 case 0x500c: /* X61t: tablet pen removed from bay */
3019 return true;
3020
3021 case 0x5009: /* X41t-X61t: swivel up (tablet mode) */
3022 case 0x500a: /* X41t-X61t: swivel down (normal mode) */
3023 tpacpi_input_send_tabletsw();
3024 hotkey_tablet_mode_notify_change();
3025 *send_acpi_ev = false;
3026 return true;
3027
3028 case 0x5001:
3029 case 0x5002:
3030 /* LID switch events. Do not propagate */
3031 *ignore_acpi_ev = true;
3032 return true;
3033
3034 default:
3035 return false;
3036 }
3037 }
3038
3039 static bool hotkey_notify_thermal(const u32 hkey,
3040 bool *send_acpi_ev,
3041 bool *ignore_acpi_ev)
3042 {
3043 /* 0x6000-0x6FFF: thermal alarms */
3044 *send_acpi_ev = true;
3045 *ignore_acpi_ev = false;
3046
3047 switch (hkey) {
3048 case 0x6011:
3049 printk(TPACPI_CRIT
3050 "THERMAL ALARM: battery is too hot!\n");
3051 /* recommended action: warn user through gui */
3052 return true;
3053 case 0x6012:
3054 printk(TPACPI_ALERT
3055 "THERMAL EMERGENCY: battery is extremely hot!\n");
3056 /* recommended action: immediate sleep/hibernate */
3057 return true;
3058 case 0x6021:
3059 printk(TPACPI_CRIT
3060 "THERMAL ALARM: "
3061 "a sensor reports something is too hot!\n");
3062 /* recommended action: warn user through gui, that */
3063 /* some internal component is too hot */
3064 return true;
3065 case 0x6022:
3066 printk(TPACPI_ALERT
3067 "THERMAL EMERGENCY: "
3068 "a sensor reports something is extremely hot!\n");
3069 /* recommended action: immediate sleep/hibernate */
3070 return true;
3071 case 0x6030:
3072 printk(TPACPI_INFO
3073 "EC reports that Thermal Table has changed\n");
3074 /* recommended action: do nothing, we don't have
3075 * Lenovo ATM information */
3076 return true;
3077 default:
3078 printk(TPACPI_ALERT
3079 "THERMAL ALERT: unknown thermal alarm received\n");
3080 return false;
3081 }
3082 }
3083
3084 static void hotkey_notify(struct ibm_struct *ibm, u32 event)
3085 {
3086 u32 hkey;
3087 bool send_acpi_ev;
3088 bool ignore_acpi_ev;
3089 bool known_ev;
3090
3091 if (event != 0x80) {
3092 printk(TPACPI_ERR
3093 "unknown HKEY notification event %d\n", event);
3094 /* forward it to userspace, maybe it knows how to handle it */
3095 acpi_bus_generate_netlink_event(
3096 ibm->acpi->device->pnp.device_class,
3097 dev_name(&ibm->acpi->device->dev),
3098 event, 0);
3099 return;
3100 }
3101
3102 while (1) {
3103 if (!acpi_evalf(hkey_handle, &hkey, "MHKP", "d")) {
3104 printk(TPACPI_ERR "failed to retrieve HKEY event\n");
3105 return;
3106 }
3107
3108 if (hkey == 0) {
3109 /* queue empty */
3110 return;
3111 }
3112
3113 send_acpi_ev = true;
3114 ignore_acpi_ev = false;
3115
3116 switch (hkey >> 12) {
3117 case 1:
3118 /* 0x1000-0x1FFF: key presses */
3119 known_ev = hotkey_notify_hotkey(hkey, &send_acpi_ev,
3120 &ignore_acpi_ev);
3121 break;
3122 case 2:
3123 /* 0x2000-0x2FFF: Wakeup reason */
3124 known_ev = hotkey_notify_wakeup(hkey, &send_acpi_ev,
3125 &ignore_acpi_ev);
3126 break;
3127 case 3:
3128 /* 0x3000-0x3FFF: bay-related wakeups */
3129 if (hkey == 0x3003) {
3130 hotkey_autosleep_ack = 1;
3131 printk(TPACPI_INFO
3132 "bay ejected\n");
3133 hotkey_wakeup_hotunplug_complete_notify_change();
3134 known_ev = true;
3135 } else {
3136 known_ev = false;
3137 }
3138 break;
3139 case 4:
3140 /* 0x4000-0x4FFF: dock-related wakeups */
3141 if (hkey == 0x4003) {
3142 hotkey_autosleep_ack = 1;
3143 printk(TPACPI_INFO
3144 "undocked\n");
3145 hotkey_wakeup_hotunplug_complete_notify_change();
3146 known_ev = true;
3147 } else {
3148 known_ev = false;
3149 }
3150 break;
3151 case 5:
3152 /* 0x5000-0x5FFF: human interface helpers */
3153 known_ev = hotkey_notify_usrevent(hkey, &send_acpi_ev,
3154 &ignore_acpi_ev);
3155 break;
3156 case 6:
3157 /* 0x6000-0x6FFF: thermal alarms */
3158 known_ev = hotkey_notify_thermal(hkey, &send_acpi_ev,
3159 &ignore_acpi_ev);
3160 break;
3161 case 7:
3162 /* 0x7000-0x7FFF: misc */
3163 if (tp_features.hotkey_wlsw && hkey == 0x7000) {
3164 tpacpi_send_radiosw_update();
3165 send_acpi_ev = 0;
3166 known_ev = true;
3167 break;
3168 }
3169 /* fallthrough to default */
3170 default:
3171 known_ev = false;
3172 }
3173 if (!known_ev) {
3174 printk(TPACPI_NOTICE
3175 "unhandled HKEY event 0x%04x\n", hkey);
3176 printk(TPACPI_NOTICE
3177 "please report the conditions when this "
3178 "event happened to %s\n", TPACPI_MAIL);
3179 }
3180
3181 /* Legacy events */
3182 if (!ignore_acpi_ev &&
3183 (send_acpi_ev || hotkey_report_mode < 2)) {
3184 acpi_bus_generate_proc_event(ibm->acpi->device,
3185 event, hkey);
3186 }
3187
3188 /* netlink events */
3189 if (!ignore_acpi_ev && send_acpi_ev) {
3190 acpi_bus_generate_netlink_event(
3191 ibm->acpi->device->pnp.device_class,
3192 dev_name(&ibm->acpi->device->dev),
3193 event, hkey);
3194 }
3195 }
3196 }
3197
3198 static void hotkey_suspend(pm_message_t state)
3199 {
3200 /* Do these on suspend, we get the events on early resume! */
3201 hotkey_wakeup_reason = TP_ACPI_WAKEUP_NONE;
3202 hotkey_autosleep_ack = 0;
3203 }
3204
3205 static void hotkey_resume(void)
3206 {
3207 tpacpi_disable_brightness_delay();
3208
3209 if (hotkey_mask_get())
3210 printk(TPACPI_ERR
3211 "error while trying to read hot key mask "
3212 "from firmware\n");
3213 tpacpi_send_radiosw_update();
3214 hotkey_tablet_mode_notify_change();
3215 hotkey_wakeup_reason_notify_change();
3216 hotkey_wakeup_hotunplug_complete_notify_change();
3217 hotkey_poll_setup_safe(0);
3218 }
3219
3220 /* procfs -------------------------------------------------------------- */
3221 static int hotkey_read(char *p)
3222 {
3223 int res, status;
3224 int len = 0;
3225
3226 if (!tp_features.hotkey) {
3227 len += sprintf(p + len, "status:\t\tnot supported\n");
3228 return len;
3229 }
3230
3231 if (mutex_lock_killable(&hotkey_mutex))
3232 return -ERESTARTSYS;
3233 res = hotkey_status_get(&status);
3234 if (!res)
3235 res = hotkey_mask_get();
3236 mutex_unlock(&hotkey_mutex);
3237 if (res)
3238 return res;
3239
3240 len += sprintf(p + len, "status:\t\t%s\n", enabled(status, 0));
3241 if (tp_features.hotkey_mask) {
3242 len += sprintf(p + len, "mask:\t\t0x%08x\n", hotkey_mask);
3243 len += sprintf(p + len,
3244 "commands:\tenable, disable, reset, <mask>\n");
3245 } else {
3246 len += sprintf(p + len, "mask:\t\tnot supported\n");
3247 len += sprintf(p + len, "commands:\tenable, disable, reset\n");
3248 }
3249
3250 return len;
3251 }
3252
3253 static void hotkey_enabledisable_warn(bool enable)
3254 {
3255 tpacpi_log_usertask("procfs hotkey enable/disable");
3256 if (!WARN((tpacpi_lifecycle == TPACPI_LIFE_RUNNING || !enable),
3257 TPACPI_WARN
3258 "hotkey enable/disable functionality has been "
3259 "removed from the driver. Hotkeys are always "
3260 "enabled\n"))
3261 printk(TPACPI_ERR
3262 "Please remove the hotkey=enable module "
3263 "parameter, it is deprecated. Hotkeys are always "
3264 "enabled\n");
3265 }
3266
3267 static int hotkey_write(char *buf)
3268 {
3269 int res;
3270 u32 mask;
3271 char *cmd;
3272
3273 if (!tp_features.hotkey)
3274 return -ENODEV;
3275
3276 if (mutex_lock_killable(&hotkey_mutex))
3277 return -ERESTARTSYS;
3278
3279 mask = hotkey_mask;
3280
3281 res = 0;
3282 while ((cmd = next_cmd(&buf))) {
3283 if (strlencmp(cmd, "enable") == 0) {
3284 hotkey_enabledisable_warn(1);
3285 } else if (strlencmp(cmd, "disable") == 0) {
3286 hotkey_enabledisable_warn(0);
3287 res = -EPERM;
3288 } else if (strlencmp(cmd, "reset") == 0) {
3289 mask = hotkey_orig_mask;
3290 } else if (sscanf(cmd, "0x%x", &mask) == 1) {
3291 /* mask set */
3292 } else if (sscanf(cmd, "%x", &mask) == 1) {
3293 /* mask set */
3294 } else {
3295 res = -EINVAL;
3296 goto errexit;
3297 }
3298 }
3299
3300 if (!res)
3301 tpacpi_disclose_usertask("procfs hotkey",
3302 "set mask to 0x%08x\n", mask);
3303
3304 if (!res && mask != hotkey_mask)
3305 res = hotkey_mask_set(mask);
3306
3307 errexit:
3308 mutex_unlock(&hotkey_mutex);
3309 return res;
3310 }
3311
3312 static const struct acpi_device_id ibm_htk_device_ids[] = {
3313 {TPACPI_ACPI_HKEY_HID, 0},
3314 {"", 0},
3315 };
3316
3317 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver = {
3318 .hid = ibm_htk_device_ids,
3319 .notify = hotkey_notify,
3320 .handle = &hkey_handle,
3321 .type = ACPI_DEVICE_NOTIFY,
3322 };
3323
3324 static struct ibm_struct hotkey_driver_data = {
3325 .name = "hotkey",
3326 .read = hotkey_read,
3327 .write = hotkey_write,
3328 .exit = hotkey_exit,
3329 .resume = hotkey_resume,
3330 .suspend = hotkey_suspend,
3331 .acpi = &ibm_hotkey_acpidriver,
3332 };
3333
3334 /*************************************************************************
3335 * Bluetooth subdriver
3336 */
3337
3338 enum {
3339 /* ACPI GBDC/SBDC bits */
3340 TP_ACPI_BLUETOOTH_HWPRESENT = 0x01, /* Bluetooth hw available */
3341 TP_ACPI_BLUETOOTH_RADIOSSW = 0x02, /* Bluetooth radio enabled */
3342 TP_ACPI_BLUETOOTH_RESUMECTRL = 0x04, /* Bluetooth state at resume:
3343 off / last state */
3344 };
3345
3346 enum {
3347 /* ACPI \BLTH commands */
3348 TP_ACPI_BLTH_GET_ULTRAPORT_ID = 0x00, /* Get Ultraport BT ID */
3349 TP_ACPI_BLTH_GET_PWR_ON_RESUME = 0x01, /* Get power-on-resume state */
3350 TP_ACPI_BLTH_PWR_ON_ON_RESUME = 0x02, /* Resume powered on */
3351 TP_ACPI_BLTH_PWR_OFF_ON_RESUME = 0x03, /* Resume powered off */
3352 TP_ACPI_BLTH_SAVE_STATE = 0x05, /* Save state for S4/S5 */
3353 };
3354
3355 #define TPACPI_RFK_BLUETOOTH_SW_NAME "tpacpi_bluetooth_sw"
3356
3357 static void bluetooth_suspend(pm_message_t state)
3358 {
3359 /* Try to make sure radio will resume powered off */
3360 if (!acpi_evalf(NULL, NULL, "\\BLTH", "vd",
3361 TP_ACPI_BLTH_PWR_OFF_ON_RESUME))
3362 vdbg_printk(TPACPI_DBG_RFKILL,
3363 "bluetooth power down on resume request failed\n");
3364 }
3365
3366 static int bluetooth_get_status(void)
3367 {
3368 int status;
3369
3370 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3371 if (dbg_bluetoothemul)
3372 return (tpacpi_bluetooth_emulstate) ?
3373 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
3374 #endif
3375
3376 if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
3377 return -EIO;
3378
3379 return ((status & TP_ACPI_BLUETOOTH_RADIOSSW) != 0) ?
3380 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
3381 }
3382
3383 static int bluetooth_set_status(enum tpacpi_rfkill_state state)
3384 {
3385 int status;
3386
3387 vdbg_printk(TPACPI_DBG_RFKILL,
3388 "will attempt to %s bluetooth\n",
3389 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable");
3390
3391 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3392 if (dbg_bluetoothemul) {
3393 tpacpi_bluetooth_emulstate = (state == TPACPI_RFK_RADIO_ON);
3394 return 0;
3395 }
3396 #endif
3397
3398 /* We make sure to keep TP_ACPI_BLUETOOTH_RESUMECTRL off */
3399 if (state == TPACPI_RFK_RADIO_ON)
3400 status = TP_ACPI_BLUETOOTH_RADIOSSW;
3401 else
3402 status = 0;
3403
3404 if (!acpi_evalf(hkey_handle, NULL, "SBDC", "vd", status))
3405 return -EIO;
3406
3407 return 0;
3408 }
3409
3410 /* sysfs bluetooth enable ---------------------------------------------- */
3411 static ssize_t bluetooth_enable_show(struct device *dev,
3412 struct device_attribute *attr,
3413 char *buf)
3414 {
3415 return tpacpi_rfk_sysfs_enable_show(TPACPI_RFK_BLUETOOTH_SW_ID,
3416 attr, buf);
3417 }
3418
3419 static ssize_t bluetooth_enable_store(struct device *dev,
3420 struct device_attribute *attr,
3421 const char *buf, size_t count)
3422 {
3423 return tpacpi_rfk_sysfs_enable_store(TPACPI_RFK_BLUETOOTH_SW_ID,
3424 attr, buf, count);
3425 }
3426
3427 static struct device_attribute dev_attr_bluetooth_enable =
3428 __ATTR(bluetooth_enable, S_IWUSR | S_IRUGO,
3429 bluetooth_enable_show, bluetooth_enable_store);
3430
3431 /* --------------------------------------------------------------------- */
3432
3433 static struct attribute *bluetooth_attributes[] = {
3434 &dev_attr_bluetooth_enable.attr,
3435 NULL
3436 };
3437
3438 static const struct attribute_group bluetooth_attr_group = {
3439 .attrs = bluetooth_attributes,
3440 };
3441
3442 static const struct tpacpi_rfk_ops bluetooth_tprfk_ops = {
3443 .get_status = bluetooth_get_status,
3444 .set_status = bluetooth_set_status,
3445 };
3446
3447 static void bluetooth_shutdown(void)
3448 {
3449 /* Order firmware to save current state to NVRAM */
3450 if (!acpi_evalf(NULL, NULL, "\\BLTH", "vd",
3451 TP_ACPI_BLTH_SAVE_STATE))
3452 printk(TPACPI_NOTICE
3453 "failed to save bluetooth state to NVRAM\n");
3454 else
3455 vdbg_printk(TPACPI_DBG_RFKILL,
3456 "bluestooth state saved to NVRAM\n");
3457 }
3458
3459 static void bluetooth_exit(void)
3460 {
3461 sysfs_remove_group(&tpacpi_pdev->dev.kobj,
3462 &bluetooth_attr_group);
3463
3464 tpacpi_destroy_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID);
3465
3466 bluetooth_shutdown();
3467 }
3468
3469 static int __init bluetooth_init(struct ibm_init_struct *iibm)
3470 {
3471 int res;
3472 int status = 0;
3473
3474 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
3475 "initializing bluetooth subdriver\n");
3476
3477 TPACPI_ACPIHANDLE_INIT(hkey);
3478
3479 /* bluetooth not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
3480 G4x, R30, R31, R40e, R50e, T20-22, X20-21 */
3481 tp_features.bluetooth = hkey_handle &&
3482 acpi_evalf(hkey_handle, &status, "GBDC", "qd");
3483
3484 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
3485 "bluetooth is %s, status 0x%02x\n",
3486 str_supported(tp_features.bluetooth),
3487 status);
3488
3489 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3490 if (dbg_bluetoothemul) {
3491 tp_features.bluetooth = 1;
3492 printk(TPACPI_INFO
3493 "bluetooth switch emulation enabled\n");
3494 } else
3495 #endif
3496 if (tp_features.bluetooth &&
3497 !(status & TP_ACPI_BLUETOOTH_HWPRESENT)) {
3498 /* no bluetooth hardware present in system */
3499 tp_features.bluetooth = 0;
3500 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
3501 "bluetooth hardware not installed\n");
3502 }
3503
3504 if (!tp_features.bluetooth)
3505 return 1;
3506
3507 res = tpacpi_new_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID,
3508 &bluetooth_tprfk_ops,
3509 RFKILL_TYPE_BLUETOOTH,
3510 TPACPI_RFK_BLUETOOTH_SW_NAME,
3511 true);
3512 if (res)
3513 return res;
3514
3515 res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
3516 &bluetooth_attr_group);
3517 if (res) {
3518 tpacpi_destroy_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID);
3519 return res;
3520 }
3521
3522 return 0;
3523 }
3524
3525 /* procfs -------------------------------------------------------------- */
3526 static int bluetooth_read(char *p)
3527 {
3528 return tpacpi_rfk_procfs_read(TPACPI_RFK_BLUETOOTH_SW_ID, p);
3529 }
3530
3531 static int bluetooth_write(char *buf)
3532 {
3533 return tpacpi_rfk_procfs_write(TPACPI_RFK_BLUETOOTH_SW_ID, buf);
3534 }
3535
3536 static struct ibm_struct bluetooth_driver_data = {
3537 .name = "bluetooth",
3538 .read = bluetooth_read,
3539 .write = bluetooth_write,
3540 .exit = bluetooth_exit,
3541 .suspend = bluetooth_suspend,
3542 .shutdown = bluetooth_shutdown,
3543 };
3544
3545 /*************************************************************************
3546 * Wan subdriver
3547 */
3548
3549 enum {
3550 /* ACPI GWAN/SWAN bits */
3551 TP_ACPI_WANCARD_HWPRESENT = 0x01, /* Wan hw available */
3552 TP_ACPI_WANCARD_RADIOSSW = 0x02, /* Wan radio enabled */
3553 TP_ACPI_WANCARD_RESUMECTRL = 0x04, /* Wan state at resume:
3554 off / last state */
3555 };
3556
3557 #define TPACPI_RFK_WWAN_SW_NAME "tpacpi_wwan_sw"
3558
3559 static void wan_suspend(pm_message_t state)
3560 {
3561 /* Try to make sure radio will resume powered off */
3562 if (!acpi_evalf(NULL, NULL, "\\WGSV", "qvd",
3563 TP_ACPI_WGSV_PWR_OFF_ON_RESUME))
3564 vdbg_printk(TPACPI_DBG_RFKILL,
3565 "WWAN power down on resume request failed\n");
3566 }
3567
3568 static int wan_get_status(void)
3569 {
3570 int status;
3571
3572 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3573 if (dbg_wwanemul)
3574 return (tpacpi_wwan_emulstate) ?
3575 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
3576 #endif
3577
3578 if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
3579 return -EIO;
3580
3581 return ((status & TP_ACPI_WANCARD_RADIOSSW) != 0) ?
3582 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
3583 }
3584
3585 static int wan_set_status(enum tpacpi_rfkill_state state)
3586 {
3587 int status;
3588
3589 vdbg_printk(TPACPI_DBG_RFKILL,
3590 "will attempt to %s wwan\n",
3591 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable");
3592
3593 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3594 if (dbg_wwanemul) {
3595 tpacpi_wwan_emulstate = (state == TPACPI_RFK_RADIO_ON);
3596 return 0;
3597 }
3598 #endif
3599
3600 /* We make sure to keep TP_ACPI_WANCARD_RESUMECTRL off */
3601 if (state == TPACPI_RFK_RADIO_ON)
3602 status = TP_ACPI_WANCARD_RADIOSSW;
3603 else
3604 status = 0;
3605
3606 if (!acpi_evalf(hkey_handle, NULL, "SWAN", "vd", status))
3607 return -EIO;
3608
3609 return 0;
3610 }
3611
3612 /* sysfs wan enable ---------------------------------------------------- */
3613 static ssize_t wan_enable_show(struct device *dev,
3614 struct device_attribute *attr,
3615 char *buf)
3616 {
3617 return tpacpi_rfk_sysfs_enable_show(TPACPI_RFK_WWAN_SW_ID,
3618 attr, buf);
3619 }
3620
3621 static ssize_t wan_enable_store(struct device *dev,
3622 struct device_attribute *attr,
3623 const char *buf, size_t count)
3624 {
3625 return tpacpi_rfk_sysfs_enable_store(TPACPI_RFK_WWAN_SW_ID,
3626 attr, buf, count);
3627 }
3628
3629 static struct device_attribute dev_attr_wan_enable =
3630 __ATTR(wwan_enable, S_IWUSR | S_IRUGO,
3631 wan_enable_show, wan_enable_store);
3632
3633 /* --------------------------------------------------------------------- */
3634
3635 static struct attribute *wan_attributes[] = {
3636 &dev_attr_wan_enable.attr,
3637 NULL
3638 };
3639
3640 static const struct attribute_group wan_attr_group = {
3641 .attrs = wan_attributes,
3642 };
3643
3644 static const struct tpacpi_rfk_ops wan_tprfk_ops = {
3645 .get_status = wan_get_status,
3646 .set_status = wan_set_status,
3647 };
3648
3649 static void wan_shutdown(void)
3650 {
3651 /* Order firmware to save current state to NVRAM */
3652 if (!acpi_evalf(NULL, NULL, "\\WGSV", "vd",
3653 TP_ACPI_WGSV_SAVE_STATE))
3654 printk(TPACPI_NOTICE
3655 "failed to save WWAN state to NVRAM\n");
3656 else
3657 vdbg_printk(TPACPI_DBG_RFKILL,
3658 "WWAN state saved to NVRAM\n");
3659 }
3660
3661 static void wan_exit(void)
3662 {
3663 sysfs_remove_group(&tpacpi_pdev->dev.kobj,
3664 &wan_attr_group);
3665
3666 tpacpi_destroy_rfkill(TPACPI_RFK_WWAN_SW_ID);
3667
3668 wan_shutdown();
3669 }
3670
3671 static int __init wan_init(struct ibm_init_struct *iibm)
3672 {
3673 int res;
3674 int status = 0;
3675
3676 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
3677 "initializing wan subdriver\n");
3678
3679 TPACPI_ACPIHANDLE_INIT(hkey);
3680
3681 tp_features.wan = hkey_handle &&
3682 acpi_evalf(hkey_handle, &status, "GWAN", "qd");
3683
3684 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
3685 "wan is %s, status 0x%02x\n",
3686 str_supported(tp_features.wan),
3687 status);
3688
3689 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3690 if (dbg_wwanemul) {
3691 tp_features.wan = 1;
3692 printk(TPACPI_INFO
3693 "wwan switch emulation enabled\n");
3694 } else
3695 #endif
3696 if (tp_features.wan &&
3697 !(status & TP_ACPI_WANCARD_HWPRESENT)) {
3698 /* no wan hardware present in system */
3699 tp_features.wan = 0;
3700 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
3701 "wan hardware not installed\n");
3702 }
3703
3704 if (!tp_features.wan)
3705 return 1;
3706
3707 res = tpacpi_new_rfkill(TPACPI_RFK_WWAN_SW_ID,
3708 &wan_tprfk_ops,
3709 RFKILL_TYPE_WWAN,
3710 TPACPI_RFK_WWAN_SW_NAME,
3711 true);
3712 if (res)
3713 return res;
3714
3715 res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
3716 &wan_attr_group);
3717
3718 if (res) {
3719 tpacpi_destroy_rfkill(TPACPI_RFK_WWAN_SW_ID);
3720 return res;
3721 }
3722
3723 return 0;
3724 }
3725
3726 /* procfs -------------------------------------------------------------- */
3727 static int wan_read(char *p)
3728 {
3729 return tpacpi_rfk_procfs_read(TPACPI_RFK_WWAN_SW_ID, p);
3730 }
3731
3732 static int wan_write(char *buf)
3733 {
3734 return tpacpi_rfk_procfs_write(TPACPI_RFK_WWAN_SW_ID, buf);
3735 }
3736
3737 static struct ibm_struct wan_driver_data = {
3738 .name = "wan",
3739 .read = wan_read,
3740 .write = wan_write,
3741 .exit = wan_exit,
3742 .suspend = wan_suspend,
3743 .shutdown = wan_shutdown,
3744 };
3745
3746 /*************************************************************************
3747 * UWB subdriver
3748 */
3749
3750 enum {
3751 /* ACPI GUWB/SUWB bits */
3752 TP_ACPI_UWB_HWPRESENT = 0x01, /* UWB hw available */
3753 TP_ACPI_UWB_RADIOSSW = 0x02, /* UWB radio enabled */
3754 };
3755
3756 #define TPACPI_RFK_UWB_SW_NAME "tpacpi_uwb_sw"
3757
3758 static int uwb_get_status(void)
3759 {
3760 int status;
3761
3762 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3763 if (dbg_uwbemul)
3764 return (tpacpi_uwb_emulstate) ?
3765 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
3766 #endif
3767
3768 if (!acpi_evalf(hkey_handle, &status, "GUWB", "d"))
3769 return -EIO;
3770
3771 return ((status & TP_ACPI_UWB_RADIOSSW) != 0) ?
3772 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
3773 }
3774
3775 static int uwb_set_status(enum tpacpi_rfkill_state state)
3776 {
3777 int status;
3778
3779 vdbg_printk(TPACPI_DBG_RFKILL,
3780 "will attempt to %s UWB\n",
3781 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable");
3782
3783 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3784 if (dbg_uwbemul) {
3785 tpacpi_uwb_emulstate = (state == TPACPI_RFK_RADIO_ON);
3786 return 0;
3787 }
3788 #endif
3789
3790 if (state == TPACPI_RFK_RADIO_ON)
3791 status = TP_ACPI_UWB_RADIOSSW;
3792 else
3793 status = 0;
3794
3795 if (!acpi_evalf(hkey_handle, NULL, "SUWB", "vd", status))
3796 return -EIO;
3797
3798 return 0;
3799 }
3800
3801 /* --------------------------------------------------------------------- */
3802
3803 static const struct tpacpi_rfk_ops uwb_tprfk_ops = {
3804 .get_status = uwb_get_status,
3805 .set_status = uwb_set_status,
3806 };
3807
3808 static void uwb_exit(void)
3809 {
3810 tpacpi_destroy_rfkill(TPACPI_RFK_UWB_SW_ID);
3811 }
3812
3813 static int __init uwb_init(struct ibm_init_struct *iibm)
3814 {
3815 int res;
3816 int status = 0;
3817
3818 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
3819 "initializing uwb subdriver\n");
3820
3821 TPACPI_ACPIHANDLE_INIT(hkey);
3822
3823 tp_features.uwb = hkey_handle &&
3824 acpi_evalf(hkey_handle, &status, "GUWB", "qd");
3825
3826 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
3827 "uwb is %s, status 0x%02x\n",
3828 str_supported(tp_features.uwb),
3829 status);
3830
3831 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3832 if (dbg_uwbemul) {
3833 tp_features.uwb = 1;
3834 printk(TPACPI_INFO
3835 "uwb switch emulation enabled\n");
3836 } else
3837 #endif
3838 if (tp_features.uwb &&
3839 !(status & TP_ACPI_UWB_HWPRESENT)) {
3840 /* no uwb hardware present in system */
3841 tp_features.uwb = 0;
3842 dbg_printk(TPACPI_DBG_INIT,
3843 "uwb hardware not installed\n");
3844 }
3845
3846 if (!tp_features.uwb)
3847 return 1;
3848
3849 res = tpacpi_new_rfkill(TPACPI_RFK_UWB_SW_ID,
3850 &uwb_tprfk_ops,
3851 RFKILL_TYPE_UWB,
3852 TPACPI_RFK_UWB_SW_NAME,
3853 false);
3854 return res;
3855 }
3856
3857 static struct ibm_struct uwb_driver_data = {
3858 .name = "uwb",
3859 .exit = uwb_exit,
3860 .flags.experimental = 1,
3861 };
3862
3863 /*************************************************************************
3864 * Video subdriver
3865 */
3866
3867 #ifdef CONFIG_THINKPAD_ACPI_VIDEO
3868
3869 enum video_access_mode {
3870 TPACPI_VIDEO_NONE = 0,
3871 TPACPI_VIDEO_570, /* 570 */
3872 TPACPI_VIDEO_770, /* 600e/x, 770e, 770x */
3873 TPACPI_VIDEO_NEW, /* all others */
3874 };
3875
3876 enum { /* video status flags, based on VIDEO_570 */
3877 TP_ACPI_VIDEO_S_LCD = 0x01, /* LCD output enabled */
3878 TP_ACPI_VIDEO_S_CRT = 0x02, /* CRT output enabled */
3879 TP_ACPI_VIDEO_S_DVI = 0x08, /* DVI output enabled */
3880 };
3881
3882 enum { /* TPACPI_VIDEO_570 constants */
3883 TP_ACPI_VIDEO_570_PHSCMD = 0x87, /* unknown magic constant :( */
3884 TP_ACPI_VIDEO_570_PHSMASK = 0x03, /* PHS bits that map to
3885 * video_status_flags */
3886 TP_ACPI_VIDEO_570_PHS2CMD = 0x8b, /* unknown magic constant :( */
3887 TP_ACPI_VIDEO_570_PHS2SET = 0x80, /* unknown magic constant :( */
3888 };
3889
3890 static enum video_access_mode video_supported;
3891 static int video_orig_autosw;
3892
3893 static int video_autosw_get(void);
3894 static int video_autosw_set(int enable);
3895
3896 TPACPI_HANDLE(vid2, root, "\\_SB.PCI0.AGPB.VID"); /* G41 */
3897
3898 static int __init video_init(struct ibm_init_struct *iibm)
3899 {
3900 int ivga;
3901
3902 vdbg_printk(TPACPI_DBG_INIT, "initializing video subdriver\n");
3903
3904 TPACPI_ACPIHANDLE_INIT(vid);
3905 TPACPI_ACPIHANDLE_INIT(vid2);
3906
3907 if (vid2_handle && acpi_evalf(NULL, &ivga, "\\IVGA", "d") && ivga)
3908 /* G41, assume IVGA doesn't change */
3909 vid_handle = vid2_handle;
3910
3911 if (!vid_handle)
3912 /* video switching not supported on R30, R31 */
3913 video_supported = TPACPI_VIDEO_NONE;
3914 else if (acpi_evalf(vid_handle, &video_orig_autosw, "SWIT", "qd"))
3915 /* 570 */
3916 video_supported = TPACPI_VIDEO_570;
3917 else if (acpi_evalf(vid_handle, &video_orig_autosw, "^VADL", "qd"))
3918 /* 600e/x, 770e, 770x */
3919 video_supported = TPACPI_VIDEO_770;
3920 else
3921 /* all others */
3922 video_supported = TPACPI_VIDEO_NEW;
3923
3924 vdbg_printk(TPACPI_DBG_INIT, "video is %s, mode %d\n",
3925 str_supported(video_supported != TPACPI_VIDEO_NONE),
3926 video_supported);
3927
3928 return (video_supported != TPACPI_VIDEO_NONE)? 0 : 1;
3929 }
3930
3931 static void video_exit(void)
3932 {
3933 dbg_printk(TPACPI_DBG_EXIT,
3934 "restoring original video autoswitch mode\n");
3935 if (video_autosw_set(video_orig_autosw))
3936 printk(TPACPI_ERR "error while trying to restore original "
3937 "video autoswitch mode\n");
3938 }
3939
3940 static int video_outputsw_get(void)
3941 {
3942 int status = 0;
3943 int i;
3944
3945 switch (video_supported) {
3946 case TPACPI_VIDEO_570:
3947 if (!acpi_evalf(NULL, &i, "\\_SB.PHS", "dd",
3948 TP_ACPI_VIDEO_570_PHSCMD))
3949 return -EIO;
3950 status = i & TP_ACPI_VIDEO_570_PHSMASK;
3951 break;
3952 case TPACPI_VIDEO_770:
3953 if (!acpi_evalf(NULL, &i, "\\VCDL", "d"))
3954 return -EIO;
3955 if (i)
3956 status |= TP_ACPI_VIDEO_S_LCD;
3957 if (!acpi_evalf(NULL, &i, "\\VCDC", "d"))
3958 return -EIO;
3959 if (i)
3960 status |= TP_ACPI_VIDEO_S_CRT;
3961 break;
3962 case TPACPI_VIDEO_NEW:
3963 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 1) ||
3964 !acpi_evalf(NULL, &i, "\\VCDC", "d"))
3965 return -EIO;
3966 if (i)
3967 status |= TP_ACPI_VIDEO_S_CRT;
3968
3969 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0) ||
3970 !acpi_evalf(NULL, &i, "\\VCDL", "d"))
3971 return -EIO;
3972 if (i)
3973 status |= TP_ACPI_VIDEO_S_LCD;
3974 if (!acpi_evalf(NULL, &i, "\\VCDD", "d"))
3975 return -EIO;
3976 if (i)
3977 status |= TP_ACPI_VIDEO_S_DVI;
3978 break;
3979 default:
3980 return -ENOSYS;
3981 }
3982
3983 return status;
3984 }
3985
3986 static int video_outputsw_set(int status)
3987 {
3988 int autosw;
3989 int res = 0;
3990
3991 switch (video_supported) {
3992 case TPACPI_VIDEO_570:
3993 res = acpi_evalf(NULL, NULL,
3994 "\\_SB.PHS2", "vdd",
3995 TP_ACPI_VIDEO_570_PHS2CMD,
3996 status | TP_ACPI_VIDEO_570_PHS2SET);
3997 break;
3998 case TPACPI_VIDEO_770:
3999 autosw = video_autosw_get();
4000 if (autosw < 0)
4001 return autosw;
4002
4003 res = video_autosw_set(1);
4004 if (res)
4005 return res;
4006 res = acpi_evalf(vid_handle, NULL,
4007 "ASWT", "vdd", status * 0x100, 0);
4008 if (!autosw && video_autosw_set(autosw)) {
4009 printk(TPACPI_ERR
4010 "video auto-switch left enabled due to error\n");
4011 return -EIO;
4012 }
4013 break;
4014 case TPACPI_VIDEO_NEW:
4015 res = acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0x80) &&
4016 acpi_evalf(NULL, NULL, "\\VSDS", "vdd", status, 1);
4017 break;
4018 default:
4019 return -ENOSYS;
4020 }
4021
4022 return (res)? 0 : -EIO;
4023 }
4024
4025 static int video_autosw_get(void)
4026 {
4027 int autosw = 0;
4028
4029 switch (video_supported) {
4030 case TPACPI_VIDEO_570:
4031 if (!acpi_evalf(vid_handle, &autosw, "SWIT", "d"))
4032 return -EIO;
4033 break;
4034 case TPACPI_VIDEO_770:
4035 case TPACPI_VIDEO_NEW:
4036 if (!acpi_evalf(vid_handle, &autosw, "^VDEE", "d"))
4037 return -EIO;
4038 break;
4039 default:
4040 return -ENOSYS;
4041 }
4042
4043 return autosw & 1;
4044 }
4045
4046 static int video_autosw_set(int enable)
4047 {
4048 if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", (enable)? 1 : 0))
4049 return -EIO;
4050 return 0;
4051 }
4052
4053 static int video_outputsw_cycle(void)
4054 {
4055 int autosw = video_autosw_get();
4056 int res;
4057
4058 if (autosw < 0)
4059 return autosw;
4060
4061 switch (video_supported) {
4062 case TPACPI_VIDEO_570:
4063 res = video_autosw_set(1);
4064 if (res)
4065 return res;
4066 res = acpi_evalf(ec_handle, NULL, "_Q16", "v");
4067 break;
4068 case TPACPI_VIDEO_770:
4069 case TPACPI_VIDEO_NEW:
4070 res = video_autosw_set(1);
4071 if (res)
4072 return res;
4073 res = acpi_evalf(vid_handle, NULL, "VSWT", "v");
4074 break;
4075 default:
4076 return -ENOSYS;
4077 }
4078 if (!autosw && video_autosw_set(autosw)) {
4079 printk(TPACPI_ERR
4080 "video auto-switch left enabled due to error\n");
4081 return -EIO;
4082 }
4083
4084 return (res)? 0 : -EIO;
4085 }
4086
4087 static int video_expand_toggle(void)
4088 {
4089 switch (video_supported) {
4090 case TPACPI_VIDEO_570:
4091 return acpi_evalf(ec_handle, NULL, "_Q17", "v")?
4092 0 : -EIO;
4093 case TPACPI_VIDEO_770:
4094 return acpi_evalf(vid_handle, NULL, "VEXP", "v")?
4095 0 : -EIO;
4096 case TPACPI_VIDEO_NEW:
4097 return acpi_evalf(NULL, NULL, "\\VEXP", "v")?
4098 0 : -EIO;
4099 default:
4100 return -ENOSYS;
4101 }
4102 /* not reached */
4103 }
4104
4105 static int video_read(char *p)
4106 {
4107 int status, autosw;
4108 int len = 0;
4109
4110 if (video_supported == TPACPI_VIDEO_NONE) {
4111 len += sprintf(p + len, "status:\t\tnot supported\n");
4112 return len;
4113 }
4114
4115 status = video_outputsw_get();
4116 if (status < 0)
4117 return status;
4118
4119 autosw = video_autosw_get();
4120 if (autosw < 0)
4121 return autosw;
4122
4123 len += sprintf(p + len, "status:\t\tsupported\n");
4124 len += sprintf(p + len, "lcd:\t\t%s\n", enabled(status, 0));
4125 len += sprintf(p + len, "crt:\t\t%s\n", enabled(status, 1));
4126 if (video_supported == TPACPI_VIDEO_NEW)
4127 len += sprintf(p + len, "dvi:\t\t%s\n", enabled(status, 3));
4128 len += sprintf(p + len, "auto:\t\t%s\n", enabled(autosw, 0));
4129 len += sprintf(p + len, "commands:\tlcd_enable, lcd_disable\n");
4130 len += sprintf(p + len, "commands:\tcrt_enable, crt_disable\n");
4131 if (video_supported == TPACPI_VIDEO_NEW)
4132 len += sprintf(p + len, "commands:\tdvi_enable, dvi_disable\n");
4133 len += sprintf(p + len, "commands:\tauto_enable, auto_disable\n");
4134 len += sprintf(p + len, "commands:\tvideo_switch, expand_toggle\n");
4135
4136 return len;
4137 }
4138
4139 static int video_write(char *buf)
4140 {
4141 char *cmd;
4142 int enable, disable, status;
4143 int res;
4144
4145 if (video_supported == TPACPI_VIDEO_NONE)
4146 return -ENODEV;
4147
4148 enable = 0;
4149 disable = 0;
4150
4151 while ((cmd = next_cmd(&buf))) {
4152 if (strlencmp(cmd, "lcd_enable") == 0) {
4153 enable |= TP_ACPI_VIDEO_S_LCD;
4154 } else if (strlencmp(cmd, "lcd_disable") == 0) {
4155 disable |= TP_ACPI_VIDEO_S_LCD;
4156 } else if (strlencmp(cmd, "crt_enable") == 0) {
4157 enable |= TP_ACPI_VIDEO_S_CRT;
4158 } else if (strlencmp(cmd, "crt_disable") == 0) {
4159 disable |= TP_ACPI_VIDEO_S_CRT;
4160 } else if (video_supported == TPACPI_VIDEO_NEW &&
4161 strlencmp(cmd, "dvi_enable") == 0) {
4162 enable |= TP_ACPI_VIDEO_S_DVI;
4163 } else if (video_supported == TPACPI_VIDEO_NEW &&
4164 strlencmp(cmd, "dvi_disable") == 0) {
4165 disable |= TP_ACPI_VIDEO_S_DVI;
4166 } else if (strlencmp(cmd, "auto_enable") == 0) {
4167 res = video_autosw_set(1);
4168 if (res)
4169 return res;
4170 } else if (strlencmp(cmd, "auto_disable") == 0) {
4171 res = video_autosw_set(0);
4172 if (res)
4173 return res;
4174 } else if (strlencmp(cmd, "video_switch") == 0) {
4175 res = video_outputsw_cycle();
4176 if (res)
4177 return res;
4178 } else if (strlencmp(cmd, "expand_toggle") == 0) {
4179 res = video_expand_toggle();
4180 if (res)
4181 return res;
4182 } else
4183 return -EINVAL;
4184 }
4185
4186 if (enable || disable) {
4187 status = video_outputsw_get();
4188 if (status < 0)
4189 return status;
4190 res = video_outputsw_set((status & ~disable) | enable);
4191 if (res)
4192 return res;
4193 }
4194
4195 return 0;
4196 }
4197
4198 static struct ibm_struct video_driver_data = {
4199 .name = "video",
4200 .read = video_read,
4201 .write = video_write,
4202 .exit = video_exit,
4203 };
4204
4205 #endif /* CONFIG_THINKPAD_ACPI_VIDEO */
4206
4207 /*************************************************************************
4208 * Light (thinklight) subdriver
4209 */
4210
4211 TPACPI_HANDLE(lght, root, "\\LGHT"); /* A21e, A2xm/p, T20-22, X20-21 */
4212 TPACPI_HANDLE(ledb, ec, "LEDB"); /* G4x */
4213
4214 static int light_get_status(void)
4215 {
4216 int status = 0;
4217
4218 if (tp_features.light_status) {
4219 if (!acpi_evalf(ec_handle, &status, "KBLT", "d"))
4220 return -EIO;
4221 return (!!status);
4222 }
4223
4224 return -ENXIO;
4225 }
4226
4227 static int light_set_status(int status)
4228 {
4229 int rc;
4230
4231 if (tp_features.light) {
4232 if (cmos_handle) {
4233 rc = acpi_evalf(cmos_handle, NULL, NULL, "vd",
4234 (status)?
4235 TP_CMOS_THINKLIGHT_ON :
4236 TP_CMOS_THINKLIGHT_OFF);
4237 } else {
4238 rc = acpi_evalf(lght_handle, NULL, NULL, "vd",
4239 (status)? 1 : 0);
4240 }
4241 return (rc)? 0 : -EIO;
4242 }
4243
4244 return -ENXIO;
4245 }
4246
4247 static void light_set_status_worker(struct work_struct *work)
4248 {
4249 struct tpacpi_led_classdev *data =
4250 container_of(work, struct tpacpi_led_classdev, work);
4251
4252 if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING))
4253 light_set_status((data->new_state != TPACPI_LED_OFF));
4254 }
4255
4256 static void light_sysfs_set(struct led_classdev *led_cdev,
4257 enum led_brightness brightness)
4258 {
4259 struct tpacpi_led_classdev *data =
4260 container_of(led_cdev,
4261 struct tpacpi_led_classdev,
4262 led_classdev);
4263 data->new_state = (brightness != LED_OFF) ?
4264 TPACPI_LED_ON : TPACPI_LED_OFF;
4265 queue_work(tpacpi_wq, &data->work);
4266 }
4267
4268 static enum led_brightness light_sysfs_get(struct led_classdev *led_cdev)
4269 {
4270 return (light_get_status() == 1)? LED_FULL : LED_OFF;
4271 }
4272
4273 static struct tpacpi_led_classdev tpacpi_led_thinklight = {
4274 .led_classdev = {
4275 .name = "tpacpi::thinklight",
4276 .brightness_set = &light_sysfs_set,
4277 .brightness_get = &light_sysfs_get,
4278 }
4279 };
4280
4281 static int __init light_init(struct ibm_init_struct *iibm)
4282 {
4283 int rc;
4284
4285 vdbg_printk(TPACPI_DBG_INIT, "initializing light subdriver\n");
4286
4287 TPACPI_ACPIHANDLE_INIT(ledb);
4288 TPACPI_ACPIHANDLE_INIT(lght);
4289 TPACPI_ACPIHANDLE_INIT(cmos);
4290 INIT_WORK(&tpacpi_led_thinklight.work, light_set_status_worker);
4291
4292 /* light not supported on 570, 600e/x, 770e, 770x, G4x, R30, R31 */
4293 tp_features.light = (cmos_handle || lght_handle) && !ledb_handle;
4294
4295 if (tp_features.light)
4296 /* light status not supported on
4297 570, 600e/x, 770e, 770x, G4x, R30, R31, R32, X20 */
4298 tp_features.light_status =
4299 acpi_evalf(ec_handle, NULL, "KBLT", "qv");
4300
4301 vdbg_printk(TPACPI_DBG_INIT, "light is %s, light status is %s\n",
4302 str_supported(tp_features.light),
4303 str_supported(tp_features.light_status));
4304
4305 if (!tp_features.light)
4306 return 1;
4307
4308 rc = led_classdev_register(&tpacpi_pdev->dev,
4309 &tpacpi_led_thinklight.led_classdev);
4310
4311 if (rc < 0) {
4312 tp_features.light = 0;
4313 tp_features.light_status = 0;
4314 } else {
4315 rc = 0;
4316 }
4317
4318 return rc;
4319 }
4320
4321 static void light_exit(void)
4322 {
4323 led_classdev_unregister(&tpacpi_led_thinklight.led_classdev);
4324 if (work_pending(&tpacpi_led_thinklight.work))
4325 flush_workqueue(tpacpi_wq);
4326 }
4327
4328 static int light_read(char *p)
4329 {
4330 int len = 0;
4331 int status;
4332
4333 if (!tp_features.light) {
4334 len += sprintf(p + len, "status:\t\tnot supported\n");
4335 } else if (!tp_features.light_status) {
4336 len += sprintf(p + len, "status:\t\tunknown\n");
4337 len += sprintf(p + len, "commands:\ton, off\n");
4338 } else {
4339 status = light_get_status();
4340 if (status < 0)
4341 return status;
4342 len += sprintf(p + len, "status:\t\t%s\n", onoff(status, 0));
4343 len += sprintf(p + len, "commands:\ton, off\n");
4344 }
4345
4346 return len;
4347 }
4348
4349 static int light_write(char *buf)
4350 {
4351 char *cmd;
4352 int newstatus = 0;
4353
4354 if (!tp_features.light)
4355 return -ENODEV;
4356
4357 while ((cmd = next_cmd(&buf))) {
4358 if (strlencmp(cmd, "on") == 0) {
4359 newstatus = 1;
4360 } else if (strlencmp(cmd, "off") == 0) {
4361 newstatus = 0;
4362 } else
4363 return -EINVAL;
4364 }
4365
4366 return light_set_status(newstatus);
4367 }
4368
4369 static struct ibm_struct light_driver_data = {
4370 .name = "light",
4371 .read = light_read,
4372 .write = light_write,
4373 .exit = light_exit,
4374 };
4375
4376 /*************************************************************************
4377 * Dock subdriver
4378 */
4379
4380 #ifdef CONFIG_THINKPAD_ACPI_DOCK
4381
4382 static void dock_notify(struct ibm_struct *ibm, u32 event);
4383 static int dock_read(char *p);
4384 static int dock_write(char *buf);
4385
4386 TPACPI_HANDLE(dock, root, "\\_SB.GDCK", /* X30, X31, X40 */
4387 "\\_SB.PCI0.DOCK", /* 600e/x,770e,770x,A2xm/p,T20-22,X20-21 */
4388 "\\_SB.PCI0.PCI1.DOCK", /* all others */
4389 "\\_SB.PCI.ISA.SLCE", /* 570 */
4390 ); /* A21e,G4x,R30,R31,R32,R40,R40e,R50e */
4391
4392 /* don't list other alternatives as we install a notify handler on the 570 */
4393 TPACPI_HANDLE(pci, root, "\\_SB.PCI"); /* 570 */
4394
4395 static const struct acpi_device_id ibm_pci_device_ids[] = {
4396 {PCI_ROOT_HID_STRING, 0},
4397 {"", 0},
4398 };
4399
4400 static struct tp_acpi_drv_struct ibm_dock_acpidriver[2] = {
4401 {
4402 .notify = dock_notify,
4403 .handle = &dock_handle,
4404 .type = ACPI_SYSTEM_NOTIFY,
4405 },
4406 {
4407 /* THIS ONE MUST NEVER BE USED FOR DRIVER AUTOLOADING.
4408 * We just use it to get notifications of dock hotplug
4409 * in very old thinkpads */
4410 .hid = ibm_pci_device_ids,
4411 .notify = dock_notify,
4412 .handle = &pci_handle,
4413 .type = ACPI_SYSTEM_NOTIFY,
4414 },
4415 };
4416
4417 static struct ibm_struct dock_driver_data[2] = {
4418 {
4419 .name = "dock",
4420 .read = dock_read,
4421 .write = dock_write,
4422 .acpi = &ibm_dock_acpidriver[0],
4423 },
4424 {
4425 .name = "dock",
4426 .acpi = &ibm_dock_acpidriver[1],
4427 },
4428 };
4429
4430 #define dock_docked() (_sta(dock_handle) & 1)
4431
4432 static int __init dock_init(struct ibm_init_struct *iibm)
4433 {
4434 vdbg_printk(TPACPI_DBG_INIT, "initializing dock subdriver\n");
4435
4436 TPACPI_ACPIHANDLE_INIT(dock);
4437
4438 vdbg_printk(TPACPI_DBG_INIT, "dock is %s\n",
4439 str_supported(dock_handle != NULL));
4440
4441 return (dock_handle)? 0 : 1;
4442 }
4443
4444 static int __init dock_init2(struct ibm_init_struct *iibm)
4445 {
4446 int dock2_needed;
4447
4448 vdbg_printk(TPACPI_DBG_INIT, "initializing dock subdriver part 2\n");
4449
4450 if (dock_driver_data[0].flags.acpi_driver_registered &&
4451 dock_driver_data[0].flags.acpi_notify_installed) {
4452 TPACPI_ACPIHANDLE_INIT(pci);
4453 dock2_needed = (pci_handle != NULL);
4454 vdbg_printk(TPACPI_DBG_INIT,
4455 "dock PCI handler for the TP 570 is %s\n",
4456 str_supported(dock2_needed));
4457 } else {
4458 vdbg_printk(TPACPI_DBG_INIT,
4459 "dock subdriver part 2 not required\n");
4460 dock2_needed = 0;
4461 }
4462
4463 return (dock2_needed)? 0 : 1;
4464 }
4465
4466 static void dock_notify(struct ibm_struct *ibm, u32 event)
4467 {
4468 int docked = dock_docked();
4469 int pci = ibm->acpi->hid && ibm->acpi->device &&
4470 acpi_match_device_ids(ibm->acpi->device, ibm_pci_device_ids);
4471 int data;
4472
4473 if (event == 1 && !pci) /* 570 */
4474 data = 1; /* button */
4475 else if (event == 1 && pci) /* 570 */
4476 data = 3; /* dock */
4477 else if (event == 3 && docked)
4478 data = 1; /* button */
4479 else if (event == 3 && !docked)
4480 data = 2; /* undock */
4481 else if (event == 0 && docked)
4482 data = 3; /* dock */
4483 else {
4484 printk(TPACPI_ERR "unknown dock event %d, status %d\n",
4485 event, _sta(dock_handle));
4486 data = 0; /* unknown */
4487 }
4488 acpi_bus_generate_proc_event(ibm->acpi->device, event, data);
4489 acpi_bus_generate_netlink_event(ibm->acpi->device->pnp.device_class,
4490 dev_name(&ibm->acpi->device->dev),
4491 event, data);
4492 }
4493
4494 static int dock_read(char *p)
4495 {
4496 int len = 0;
4497 int docked = dock_docked();
4498
4499 if (!dock_handle)
4500 len += sprintf(p + len, "status:\t\tnot supported\n");
4501 else if (!docked)
4502 len += sprintf(p + len, "status:\t\tundocked\n");
4503 else {
4504 len += sprintf(p + len, "status:\t\tdocked\n");
4505 len += sprintf(p + len, "commands:\tdock, undock\n");
4506 }
4507
4508 return len;
4509 }
4510
4511 static int dock_write(char *buf)
4512 {
4513 char *cmd;
4514
4515 if (!dock_docked())
4516 return -ENODEV;
4517
4518 while ((cmd = next_cmd(&buf))) {
4519 if (strlencmp(cmd, "undock") == 0) {
4520 if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 0) ||
4521 !acpi_evalf(dock_handle, NULL, "_EJ0", "vd", 1))
4522 return -EIO;
4523 } else if (strlencmp(cmd, "dock") == 0) {
4524 if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 1))
4525 return -EIO;
4526 } else
4527 return -EINVAL;
4528 }
4529
4530 return 0;
4531 }
4532
4533 #endif /* CONFIG_THINKPAD_ACPI_DOCK */
4534
4535 /*************************************************************************
4536 * Bay subdriver
4537 */
4538
4539 #ifdef CONFIG_THINKPAD_ACPI_BAY
4540
4541 TPACPI_HANDLE(bay, root, "\\_SB.PCI.IDE.SECN.MAST", /* 570 */
4542 "\\_SB.PCI0.IDE0.IDES.IDSM", /* 600e/x, 770e, 770x */
4543 "\\_SB.PCI0.SATA.SCND.MSTR", /* T60, X60, Z60 */
4544 "\\_SB.PCI0.IDE0.SCND.MSTR", /* all others */
4545 ); /* A21e, R30, R31 */
4546 TPACPI_HANDLE(bay_ej, bay, "_EJ3", /* 600e/x, A2xm/p, A3x */
4547 "_EJ0", /* all others */
4548 ); /* 570,A21e,G4x,R30,R31,R32,R40e,R50e */
4549 TPACPI_HANDLE(bay2, root, "\\_SB.PCI0.IDE0.PRIM.SLAV", /* A3x, R32 */
4550 "\\_SB.PCI0.IDE0.IDEP.IDPS", /* 600e/x, 770e, 770x */
4551 ); /* all others */
4552 TPACPI_HANDLE(bay2_ej, bay2, "_EJ3", /* 600e/x, 770e, A3x */
4553 "_EJ0", /* 770x */
4554 ); /* all others */
4555
4556 static int __init bay_init(struct ibm_init_struct *iibm)
4557 {
4558 vdbg_printk(TPACPI_DBG_INIT, "initializing bay subdriver\n");
4559
4560 TPACPI_ACPIHANDLE_INIT(bay);
4561 if (bay_handle)
4562 TPACPI_ACPIHANDLE_INIT(bay_ej);
4563 TPACPI_ACPIHANDLE_INIT(bay2);
4564 if (bay2_handle)
4565 TPACPI_ACPIHANDLE_INIT(bay2_ej);
4566
4567 tp_features.bay_status = bay_handle &&
4568 acpi_evalf(bay_handle, NULL, "_STA", "qv");
4569 tp_features.bay_status2 = bay2_handle &&
4570 acpi_evalf(bay2_handle, NULL, "_STA", "qv");
4571
4572 tp_features.bay_eject = bay_handle && bay_ej_handle &&
4573 (strlencmp(bay_ej_path, "_EJ0") == 0 || experimental);
4574 tp_features.bay_eject2 = bay2_handle && bay2_ej_handle &&
4575 (strlencmp(bay2_ej_path, "_EJ0") == 0 || experimental);
4576
4577 vdbg_printk(TPACPI_DBG_INIT,
4578 "bay 1: status %s, eject %s; bay 2: status %s, eject %s\n",
4579 str_supported(tp_features.bay_status),
4580 str_supported(tp_features.bay_eject),
4581 str_supported(tp_features.bay_status2),
4582 str_supported(tp_features.bay_eject2));
4583
4584 return (tp_features.bay_status || tp_features.bay_eject ||
4585 tp_features.bay_status2 || tp_features.bay_eject2)? 0 : 1;
4586 }
4587
4588 static void bay_notify(struct ibm_struct *ibm, u32 event)
4589 {
4590 acpi_bus_generate_proc_event(ibm->acpi->device, event, 0);
4591 acpi_bus_generate_netlink_event(ibm->acpi->device->pnp.device_class,
4592 dev_name(&ibm->acpi->device->dev),
4593 event, 0);
4594 }
4595
4596 #define bay_occupied(b) (_sta(b##_handle) & 1)
4597
4598 static int bay_read(char *p)
4599 {
4600 int len = 0;
4601 int occupied = bay_occupied(bay);
4602 int occupied2 = bay_occupied(bay2);
4603 int eject, eject2;
4604
4605 len += sprintf(p + len, "status:\t\t%s\n",
4606 tp_features.bay_status ?
4607 (occupied ? "occupied" : "unoccupied") :
4608 "not supported");
4609 if (tp_features.bay_status2)
4610 len += sprintf(p + len, "status2:\t%s\n", occupied2 ?
4611 "occupied" : "unoccupied");
4612
4613 eject = tp_features.bay_eject && occupied;
4614 eject2 = tp_features.bay_eject2 && occupied2;
4615
4616 if (eject && eject2)
4617 len += sprintf(p + len, "commands:\teject, eject2\n");
4618 else if (eject)
4619 len += sprintf(p + len, "commands:\teject\n");
4620 else if (eject2)
4621 len += sprintf(p + len, "commands:\teject2\n");
4622
4623 return len;
4624 }
4625
4626 static int bay_write(char *buf)
4627 {
4628 char *cmd;
4629
4630 if (!tp_features.bay_eject && !tp_features.bay_eject2)
4631 return -ENODEV;
4632
4633 while ((cmd = next_cmd(&buf))) {
4634 if (tp_features.bay_eject && strlencmp(cmd, "eject") == 0) {
4635 if (!acpi_evalf(bay_ej_handle, NULL, NULL, "vd", 1))
4636 return -EIO;
4637 } else if (tp_features.bay_eject2 &&
4638 strlencmp(cmd, "eject2") == 0) {
4639 if (!acpi_evalf(bay2_ej_handle, NULL, NULL, "vd", 1))
4640 return -EIO;
4641 } else
4642 return -EINVAL;
4643 }
4644
4645 return 0;
4646 }
4647
4648 static struct tp_acpi_drv_struct ibm_bay_acpidriver = {
4649 .notify = bay_notify,
4650 .handle = &bay_handle,
4651 .type = ACPI_SYSTEM_NOTIFY,
4652 };
4653
4654 static struct ibm_struct bay_driver_data = {
4655 .name = "bay",
4656 .read = bay_read,
4657 .write = bay_write,
4658 .acpi = &ibm_bay_acpidriver,
4659 };
4660
4661 #endif /* CONFIG_THINKPAD_ACPI_BAY */
4662
4663 /*************************************************************************
4664 * CMOS subdriver
4665 */
4666
4667 /* sysfs cmos_command -------------------------------------------------- */
4668 static ssize_t cmos_command_store(struct device *dev,
4669 struct device_attribute *attr,
4670 const char *buf, size_t count)
4671 {
4672 unsigned long cmos_cmd;
4673 int res;
4674
4675 if (parse_strtoul(buf, 21, &cmos_cmd))
4676 return -EINVAL;
4677
4678 res = issue_thinkpad_cmos_command(cmos_cmd);
4679 return (res)? res : count;
4680 }
4681
4682 static struct device_attribute dev_attr_cmos_command =
4683 __ATTR(cmos_command, S_IWUSR, NULL, cmos_command_store);
4684
4685 /* --------------------------------------------------------------------- */
4686
4687 static int __init cmos_init(struct ibm_init_struct *iibm)
4688 {
4689 int res;
4690
4691 vdbg_printk(TPACPI_DBG_INIT,
4692 "initializing cmos commands subdriver\n");
4693
4694 TPACPI_ACPIHANDLE_INIT(cmos);
4695
4696 vdbg_printk(TPACPI_DBG_INIT, "cmos commands are %s\n",
4697 str_supported(cmos_handle != NULL));
4698
4699 res = device_create_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
4700 if (res)
4701 return res;
4702
4703 return (cmos_handle)? 0 : 1;
4704 }
4705
4706 static void cmos_exit(void)
4707 {
4708 device_remove_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
4709 }
4710
4711 static int cmos_read(char *p)
4712 {
4713 int len = 0;
4714
4715 /* cmos not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
4716 R30, R31, T20-22, X20-21 */
4717 if (!cmos_handle)
4718 len += sprintf(p + len, "status:\t\tnot supported\n");
4719 else {
4720 len += sprintf(p + len, "status:\t\tsupported\n");
4721 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-21)\n");
4722 }
4723
4724 return len;
4725 }
4726
4727 static int cmos_write(char *buf)
4728 {
4729 char *cmd;
4730 int cmos_cmd, res;
4731
4732 while ((cmd = next_cmd(&buf))) {
4733 if (sscanf(cmd, "%u", &cmos_cmd) == 1 &&
4734 cmos_cmd >= 0 && cmos_cmd <= 21) {
4735 /* cmos_cmd set */
4736 } else
4737 return -EINVAL;
4738
4739 res = issue_thinkpad_cmos_command(cmos_cmd);
4740 if (res)
4741 return res;
4742 }
4743
4744 return 0;
4745 }
4746
4747 static struct ibm_struct cmos_driver_data = {
4748 .name = "cmos",
4749 .read = cmos_read,
4750 .write = cmos_write,
4751 .exit = cmos_exit,
4752 };
4753
4754 /*************************************************************************
4755 * LED subdriver
4756 */
4757
4758 enum led_access_mode {
4759 TPACPI_LED_NONE = 0,
4760 TPACPI_LED_570, /* 570 */
4761 TPACPI_LED_OLD, /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
4762 TPACPI_LED_NEW, /* all others */
4763 };
4764
4765 enum { /* For TPACPI_LED_OLD */
4766 TPACPI_LED_EC_HLCL = 0x0c, /* EC reg to get led to power on */
4767 TPACPI_LED_EC_HLBL = 0x0d, /* EC reg to blink a lit led */
4768 TPACPI_LED_EC_HLMS = 0x0e, /* EC reg to select led to command */
4769 };
4770
4771 static enum led_access_mode led_supported;
4772
4773 TPACPI_HANDLE(led, ec, "SLED", /* 570 */
4774 "SYSL", /* 600e/x, 770e, 770x, A21e, A2xm/p, */
4775 /* T20-22, X20-21 */
4776 "LED", /* all others */
4777 ); /* R30, R31 */
4778
4779 #define TPACPI_LED_NUMLEDS 8
4780 static struct tpacpi_led_classdev *tpacpi_leds;
4781 static enum led_status_t tpacpi_led_state_cache[TPACPI_LED_NUMLEDS];
4782 static const char * const tpacpi_led_names[TPACPI_LED_NUMLEDS] = {
4783 /* there's a limit of 19 chars + NULL before 2.6.26 */
4784 "tpacpi::power",
4785 "tpacpi:orange:batt",
4786 "tpacpi:green:batt",
4787 "tpacpi::dock_active",
4788 "tpacpi::bay_active",
4789 "tpacpi::dock_batt",
4790 "tpacpi::unknown_led",
4791 "tpacpi::standby",
4792 };
4793 #define TPACPI_SAFE_LEDS 0x0081U
4794
4795 static inline bool tpacpi_is_led_restricted(const unsigned int led)
4796 {
4797 #ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS
4798 return false;
4799 #else
4800 return (TPACPI_SAFE_LEDS & (1 << led)) == 0;
4801 #endif
4802 }
4803
4804 static int led_get_status(const unsigned int led)
4805 {
4806 int status;
4807 enum led_status_t led_s;
4808
4809 switch (led_supported) {
4810 case TPACPI_LED_570:
4811 if (!acpi_evalf(ec_handle,
4812 &status, "GLED", "dd", 1 << led))
4813 return -EIO;
4814 led_s = (status == 0)?
4815 TPACPI_LED_OFF :
4816 ((status == 1)?
4817 TPACPI_LED_ON :
4818 TPACPI_LED_BLINK);
4819 tpacpi_led_state_cache[led] = led_s;
4820 return led_s;
4821 default:
4822 return -ENXIO;
4823 }
4824
4825 /* not reached */
4826 }
4827
4828 static int led_set_status(const unsigned int led,
4829 const enum led_status_t ledstatus)
4830 {
4831 /* off, on, blink. Index is led_status_t */
4832 static const unsigned int led_sled_arg1[] = { 0, 1, 3 };
4833 static const unsigned int led_led_arg1[] = { 0, 0x80, 0xc0 };
4834
4835 int rc = 0;
4836
4837 switch (led_supported) {
4838 case TPACPI_LED_570:
4839 /* 570 */
4840 if (unlikely(led > 7))
4841 return -EINVAL;
4842 if (unlikely(tpacpi_is_led_restricted(led)))
4843 return -EPERM;
4844 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
4845 (1 << led), led_sled_arg1[ledstatus]))
4846 rc = -EIO;
4847 break;
4848 case TPACPI_LED_OLD:
4849 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */
4850 if (unlikely(led > 7))
4851 return -EINVAL;
4852 if (unlikely(tpacpi_is_led_restricted(led)))
4853 return -EPERM;
4854 rc = ec_write(TPACPI_LED_EC_HLMS, (1 << led));
4855 if (rc >= 0)
4856 rc = ec_write(TPACPI_LED_EC_HLBL,
4857 (ledstatus == TPACPI_LED_BLINK) << led);
4858 if (rc >= 0)
4859 rc = ec_write(TPACPI_LED_EC_HLCL,
4860 (ledstatus != TPACPI_LED_OFF) << led);
4861 break;
4862 case TPACPI_LED_NEW:
4863 /* all others */
4864 if (unlikely(led >= TPACPI_LED_NUMLEDS))
4865 return -EINVAL;
4866 if (unlikely(tpacpi_is_led_restricted(led)))
4867 return -EPERM;
4868 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
4869 led, led_led_arg1[ledstatus]))
4870 rc = -EIO;
4871 break;
4872 default:
4873 rc = -ENXIO;
4874 }
4875
4876 if (!rc)
4877 tpacpi_led_state_cache[led] = ledstatus;
4878
4879 return rc;
4880 }
4881
4882 static void led_set_status_worker(struct work_struct *work)
4883 {
4884 struct tpacpi_led_classdev *data =
4885 container_of(work, struct tpacpi_led_classdev, work);
4886
4887 if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING))
4888 led_set_status(data->led, data->new_state);
4889 }
4890
4891 static void led_sysfs_set(struct led_classdev *led_cdev,
4892 enum led_brightness brightness)
4893 {
4894 struct tpacpi_led_classdev *data = container_of(led_cdev,
4895 struct tpacpi_led_classdev, led_classdev);
4896
4897 if (brightness == LED_OFF)
4898 data->new_state = TPACPI_LED_OFF;
4899 else if (tpacpi_led_state_cache[data->led] != TPACPI_LED_BLINK)
4900 data->new_state = TPACPI_LED_ON;
4901 else
4902 data->new_state = TPACPI_LED_BLINK;
4903
4904 queue_work(tpacpi_wq, &data->work);
4905 }
4906
4907 static int led_sysfs_blink_set(struct led_classdev *led_cdev,
4908 unsigned long *delay_on, unsigned long *delay_off)
4909 {
4910 struct tpacpi_led_classdev *data = container_of(led_cdev,
4911 struct tpacpi_led_classdev, led_classdev);
4912
4913 /* Can we choose the flash rate? */
4914 if (*delay_on == 0 && *delay_off == 0) {
4915 /* yes. set them to the hardware blink rate (1 Hz) */
4916 *delay_on = 500; /* ms */
4917 *delay_off = 500; /* ms */
4918 } else if ((*delay_on != 500) || (*delay_off != 500))
4919 return -EINVAL;
4920
4921 data->new_state = TPACPI_LED_BLINK;
4922 queue_work(tpacpi_wq, &data->work);
4923
4924 return 0;
4925 }
4926
4927 static enum led_brightness led_sysfs_get(struct led_classdev *led_cdev)
4928 {
4929 int rc;
4930
4931 struct tpacpi_led_classdev *data = container_of(led_cdev,
4932 struct tpacpi_led_classdev, led_classdev);
4933
4934 rc = led_get_status(data->led);
4935
4936 if (rc == TPACPI_LED_OFF || rc < 0)
4937 rc = LED_OFF; /* no error handling in led class :( */
4938 else
4939 rc = LED_FULL;
4940
4941 return rc;
4942 }
4943
4944 static void led_exit(void)
4945 {
4946 unsigned int i;
4947
4948 for (i = 0; i < TPACPI_LED_NUMLEDS; i++) {
4949 if (tpacpi_leds[i].led_classdev.name)
4950 led_classdev_unregister(&tpacpi_leds[i].led_classdev);
4951 }
4952
4953 kfree(tpacpi_leds);
4954 }
4955
4956 static int __init tpacpi_init_led(unsigned int led)
4957 {
4958 int rc;
4959
4960 tpacpi_leds[led].led = led;
4961
4962 tpacpi_leds[led].led_classdev.brightness_set = &led_sysfs_set;
4963 tpacpi_leds[led].led_classdev.blink_set = &led_sysfs_blink_set;
4964 if (led_supported == TPACPI_LED_570)
4965 tpacpi_leds[led].led_classdev.brightness_get =
4966 &led_sysfs_get;
4967
4968 tpacpi_leds[led].led_classdev.name = tpacpi_led_names[led];
4969
4970 INIT_WORK(&tpacpi_leds[led].work, led_set_status_worker);
4971
4972 rc = led_classdev_register(&tpacpi_pdev->dev,
4973 &tpacpi_leds[led].led_classdev);
4974 if (rc < 0)
4975 tpacpi_leds[led].led_classdev.name = NULL;
4976
4977 return rc;
4978 }
4979
4980 static int __init led_init(struct ibm_init_struct *iibm)
4981 {
4982 unsigned int i;
4983 int rc;
4984
4985 vdbg_printk(TPACPI_DBG_INIT, "initializing LED subdriver\n");
4986
4987 TPACPI_ACPIHANDLE_INIT(led);
4988
4989 if (!led_handle)
4990 /* led not supported on R30, R31 */
4991 led_supported = TPACPI_LED_NONE;
4992 else if (strlencmp(led_path, "SLED") == 0)
4993 /* 570 */
4994 led_supported = TPACPI_LED_570;
4995 else if (strlencmp(led_path, "SYSL") == 0)
4996 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
4997 led_supported = TPACPI_LED_OLD;
4998 else
4999 /* all others */
5000 led_supported = TPACPI_LED_NEW;
5001
5002 vdbg_printk(TPACPI_DBG_INIT, "LED commands are %s, mode %d\n",
5003 str_supported(led_supported), led_supported);
5004
5005 tpacpi_leds = kzalloc(sizeof(*tpacpi_leds) * TPACPI_LED_NUMLEDS,
5006 GFP_KERNEL);
5007 if (!tpacpi_leds) {
5008 printk(TPACPI_ERR "Out of memory for LED data\n");
5009 return -ENOMEM;
5010 }
5011
5012 for (i = 0; i < TPACPI_LED_NUMLEDS; i++) {
5013 if (!tpacpi_is_led_restricted(i)) {
5014 rc = tpacpi_init_led(i);
5015 if (rc < 0) {
5016 led_exit();
5017 return rc;
5018 }
5019 }
5020 }
5021
5022 #ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS
5023 if (led_supported != TPACPI_LED_NONE)
5024 printk(TPACPI_NOTICE
5025 "warning: userspace override of important "
5026 "firmware LEDs is enabled\n");
5027 #endif
5028 return (led_supported != TPACPI_LED_NONE)? 0 : 1;
5029 }
5030
5031 #define str_led_status(s) \
5032 ((s) == TPACPI_LED_OFF ? "off" : \
5033 ((s) == TPACPI_LED_ON ? "on" : "blinking"))
5034
5035 static int led_read(char *p)
5036 {
5037 int len = 0;
5038
5039 if (!led_supported) {
5040 len += sprintf(p + len, "status:\t\tnot supported\n");
5041 return len;
5042 }
5043 len += sprintf(p + len, "status:\t\tsupported\n");
5044
5045 if (led_supported == TPACPI_LED_570) {
5046 /* 570 */
5047 int i, status;
5048 for (i = 0; i < 8; i++) {
5049 status = led_get_status(i);
5050 if (status < 0)
5051 return -EIO;
5052 len += sprintf(p + len, "%d:\t\t%s\n",
5053 i, str_led_status(status));
5054 }
5055 }
5056
5057 len += sprintf(p + len, "commands:\t"
5058 "<led> on, <led> off, <led> blink (<led> is 0-7)\n");
5059
5060 return len;
5061 }
5062
5063 static int led_write(char *buf)
5064 {
5065 char *cmd;
5066 int led, rc;
5067 enum led_status_t s;
5068
5069 if (!led_supported)
5070 return -ENODEV;
5071
5072 while ((cmd = next_cmd(&buf))) {
5073 if (sscanf(cmd, "%d", &led) != 1 || led < 0 || led > 7)
5074 return -EINVAL;
5075
5076 if (strstr(cmd, "off")) {
5077 s = TPACPI_LED_OFF;
5078 } else if (strstr(cmd, "on")) {
5079 s = TPACPI_LED_ON;
5080 } else if (strstr(cmd, "blink")) {
5081 s = TPACPI_LED_BLINK;
5082 } else {
5083 return -EINVAL;
5084 }
5085
5086 rc = led_set_status(led, s);
5087 if (rc < 0)
5088 return rc;
5089 }
5090
5091 return 0;
5092 }
5093
5094 static struct ibm_struct led_driver_data = {
5095 .name = "led",
5096 .read = led_read,
5097 .write = led_write,
5098 .exit = led_exit,
5099 };
5100
5101 /*************************************************************************
5102 * Beep subdriver
5103 */
5104
5105 TPACPI_HANDLE(beep, ec, "BEEP"); /* all except R30, R31 */
5106
5107 static int __init beep_init(struct ibm_init_struct *iibm)
5108 {
5109 vdbg_printk(TPACPI_DBG_INIT, "initializing beep subdriver\n");
5110
5111 TPACPI_ACPIHANDLE_INIT(beep);
5112
5113 vdbg_printk(TPACPI_DBG_INIT, "beep is %s\n",
5114 str_supported(beep_handle != NULL));
5115
5116 return (beep_handle)? 0 : 1;
5117 }
5118
5119 static int beep_read(char *p)
5120 {
5121 int len = 0;
5122
5123 if (!beep_handle)
5124 len += sprintf(p + len, "status:\t\tnot supported\n");
5125 else {
5126 len += sprintf(p + len, "status:\t\tsupported\n");
5127 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-17)\n");
5128 }
5129
5130 return len;
5131 }
5132
5133 static int beep_write(char *buf)
5134 {
5135 char *cmd;
5136 int beep_cmd;
5137
5138 if (!beep_handle)
5139 return -ENODEV;
5140
5141 while ((cmd = next_cmd(&buf))) {
5142 if (sscanf(cmd, "%u", &beep_cmd) == 1 &&
5143 beep_cmd >= 0 && beep_cmd <= 17) {
5144 /* beep_cmd set */
5145 } else
5146 return -EINVAL;
5147 if (!acpi_evalf(beep_handle, NULL, NULL, "vdd", beep_cmd, 0))
5148 return -EIO;
5149 }
5150
5151 return 0;
5152 }
5153
5154 static struct ibm_struct beep_driver_data = {
5155 .name = "beep",
5156 .read = beep_read,
5157 .write = beep_write,
5158 };
5159
5160 /*************************************************************************
5161 * Thermal subdriver
5162 */
5163
5164 enum thermal_access_mode {
5165 TPACPI_THERMAL_NONE = 0, /* No thermal support */
5166 TPACPI_THERMAL_ACPI_TMP07, /* Use ACPI TMP0-7 */
5167 TPACPI_THERMAL_ACPI_UPDT, /* Use ACPI TMP0-7 with UPDT */
5168 TPACPI_THERMAL_TPEC_8, /* Use ACPI EC regs, 8 sensors */
5169 TPACPI_THERMAL_TPEC_16, /* Use ACPI EC regs, 16 sensors */
5170 };
5171
5172 enum { /* TPACPI_THERMAL_TPEC_* */
5173 TP_EC_THERMAL_TMP0 = 0x78, /* ACPI EC regs TMP 0..7 */
5174 TP_EC_THERMAL_TMP8 = 0xC0, /* ACPI EC regs TMP 8..15 */
5175 TP_EC_THERMAL_TMP_NA = -128, /* ACPI EC sensor not available */
5176 };
5177
5178 #define TPACPI_MAX_THERMAL_SENSORS 16 /* Max thermal sensors supported */
5179 struct ibm_thermal_sensors_struct {
5180 s32 temp[TPACPI_MAX_THERMAL_SENSORS];
5181 };
5182
5183 static enum thermal_access_mode thermal_read_mode;
5184
5185 /* idx is zero-based */
5186 static int thermal_get_sensor(int idx, s32 *value)
5187 {
5188 int t;
5189 s8 tmp;
5190 char tmpi[5];
5191
5192 t = TP_EC_THERMAL_TMP0;
5193
5194 switch (thermal_read_mode) {
5195 #if TPACPI_MAX_THERMAL_SENSORS >= 16
5196 case TPACPI_THERMAL_TPEC_16:
5197 if (idx >= 8 && idx <= 15) {
5198 t = TP_EC_THERMAL_TMP8;
5199 idx -= 8;
5200 }
5201 /* fallthrough */
5202 #endif
5203 case TPACPI_THERMAL_TPEC_8:
5204 if (idx <= 7) {
5205 if (!acpi_ec_read(t + idx, &tmp))
5206 return -EIO;
5207 *value = tmp * 1000;
5208 return 0;
5209 }
5210 break;
5211
5212 case TPACPI_THERMAL_ACPI_UPDT:
5213 if (idx <= 7) {
5214 snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
5215 if (!acpi_evalf(ec_handle, NULL, "UPDT", "v"))
5216 return -EIO;
5217 if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
5218 return -EIO;
5219 *value = (t - 2732) * 100;
5220 return 0;
5221 }
5222 break;
5223
5224 case TPACPI_THERMAL_ACPI_TMP07:
5225 if (idx <= 7) {
5226 snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
5227 if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
5228 return -EIO;
5229 if (t > 127 || t < -127)
5230 t = TP_EC_THERMAL_TMP_NA;
5231 *value = t * 1000;
5232 return 0;
5233 }
5234 break;
5235
5236 case TPACPI_THERMAL_NONE:
5237 default:
5238 return -ENOSYS;
5239 }
5240
5241 return -EINVAL;
5242 }
5243
5244 static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s)
5245 {
5246 int res, i;
5247 int n;
5248
5249 n = 8;
5250 i = 0;
5251
5252 if (!s)
5253 return -EINVAL;
5254
5255 if (thermal_read_mode == TPACPI_THERMAL_TPEC_16)
5256 n = 16;
5257
5258 for (i = 0 ; i < n; i++) {
5259 res = thermal_get_sensor(i, &s->temp[i]);
5260 if (res)
5261 return res;
5262 }
5263
5264 return n;
5265 }
5266
5267 /* sysfs temp##_input -------------------------------------------------- */
5268
5269 static ssize_t thermal_temp_input_show(struct device *dev,
5270 struct device_attribute *attr,
5271 char *buf)
5272 {
5273 struct sensor_device_attribute *sensor_attr =
5274 to_sensor_dev_attr(attr);
5275 int idx = sensor_attr->index;
5276 s32 value;
5277 int res;
5278
5279 res = thermal_get_sensor(idx, &value);
5280 if (res)
5281 return res;
5282 if (value == TP_EC_THERMAL_TMP_NA * 1000)
5283 return -ENXIO;
5284
5285 return snprintf(buf, PAGE_SIZE, "%d\n", value);
5286 }
5287
5288 #define THERMAL_SENSOR_ATTR_TEMP(_idxA, _idxB) \
5289 SENSOR_ATTR(temp##_idxA##_input, S_IRUGO, \
5290 thermal_temp_input_show, NULL, _idxB)
5291
5292 static struct sensor_device_attribute sensor_dev_attr_thermal_temp_input[] = {
5293 THERMAL_SENSOR_ATTR_TEMP(1, 0),
5294 THERMAL_SENSOR_ATTR_TEMP(2, 1),
5295 THERMAL_SENSOR_ATTR_TEMP(3, 2),
5296 THERMAL_SENSOR_ATTR_TEMP(4, 3),
5297 THERMAL_SENSOR_ATTR_TEMP(5, 4),
5298 THERMAL_SENSOR_ATTR_TEMP(6, 5),
5299 THERMAL_SENSOR_ATTR_TEMP(7, 6),
5300 THERMAL_SENSOR_ATTR_TEMP(8, 7),
5301 THERMAL_SENSOR_ATTR_TEMP(9, 8),
5302 THERMAL_SENSOR_ATTR_TEMP(10, 9),
5303 THERMAL_SENSOR_ATTR_TEMP(11, 10),
5304 THERMAL_SENSOR_ATTR_TEMP(12, 11),
5305 THERMAL_SENSOR_ATTR_TEMP(13, 12),
5306 THERMAL_SENSOR_ATTR_TEMP(14, 13),
5307 THERMAL_SENSOR_ATTR_TEMP(15, 14),
5308 THERMAL_SENSOR_ATTR_TEMP(16, 15),
5309 };
5310
5311 #define THERMAL_ATTRS(X) \
5312 &sensor_dev_attr_thermal_temp_input[X].dev_attr.attr
5313
5314 static struct attribute *thermal_temp_input_attr[] = {
5315 THERMAL_ATTRS(8),
5316 THERMAL_ATTRS(9),
5317 THERMAL_ATTRS(10),
5318 THERMAL_ATTRS(11),
5319 THERMAL_ATTRS(12),
5320 THERMAL_ATTRS(13),
5321 THERMAL_ATTRS(14),
5322 THERMAL_ATTRS(15),
5323 THERMAL_ATTRS(0),
5324 THERMAL_ATTRS(1),
5325 THERMAL_ATTRS(2),
5326 THERMAL_ATTRS(3),
5327 THERMAL_ATTRS(4),
5328 THERMAL_ATTRS(5),
5329 THERMAL_ATTRS(6),
5330 THERMAL_ATTRS(7),
5331 NULL
5332 };
5333
5334 static const struct attribute_group thermal_temp_input16_group = {
5335 .attrs = thermal_temp_input_attr
5336 };
5337
5338 static const struct attribute_group thermal_temp_input8_group = {
5339 .attrs = &thermal_temp_input_attr[8]
5340 };
5341
5342 #undef THERMAL_SENSOR_ATTR_TEMP
5343 #undef THERMAL_ATTRS
5344
5345 /* --------------------------------------------------------------------- */
5346
5347 static int __init thermal_init(struct ibm_init_struct *iibm)
5348 {
5349 u8 t, ta1, ta2;
5350 int i;
5351 int acpi_tmp7;
5352 int res;
5353
5354 vdbg_printk(TPACPI_DBG_INIT, "initializing thermal subdriver\n");
5355
5356 acpi_tmp7 = acpi_evalf(ec_handle, NULL, "TMP7", "qv");
5357
5358 if (thinkpad_id.ec_model) {
5359 /*
5360 * Direct EC access mode: sensors at registers
5361 * 0x78-0x7F, 0xC0-0xC7. Registers return 0x00 for
5362 * non-implemented, thermal sensors return 0x80 when
5363 * not available
5364 */
5365
5366 ta1 = ta2 = 0;
5367 for (i = 0; i < 8; i++) {
5368 if (acpi_ec_read(TP_EC_THERMAL_TMP0 + i, &t)) {
5369 ta1 |= t;
5370 } else {
5371 ta1 = 0;
5372 break;
5373 }
5374 if (acpi_ec_read(TP_EC_THERMAL_TMP8 + i, &t)) {
5375 ta2 |= t;
5376 } else {
5377 ta1 = 0;
5378 break;
5379 }
5380 }
5381 if (ta1 == 0) {
5382 /* This is sheer paranoia, but we handle it anyway */
5383 if (acpi_tmp7) {
5384 printk(TPACPI_ERR
5385 "ThinkPad ACPI EC access misbehaving, "
5386 "falling back to ACPI TMPx access "
5387 "mode\n");
5388 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
5389 } else {
5390 printk(TPACPI_ERR
5391 "ThinkPad ACPI EC access misbehaving, "
5392 "disabling thermal sensors access\n");
5393 thermal_read_mode = TPACPI_THERMAL_NONE;
5394 }
5395 } else {
5396 thermal_read_mode =
5397 (ta2 != 0) ?
5398 TPACPI_THERMAL_TPEC_16 : TPACPI_THERMAL_TPEC_8;
5399 }
5400 } else if (acpi_tmp7) {
5401 if (acpi_evalf(ec_handle, NULL, "UPDT", "qv")) {
5402 /* 600e/x, 770e, 770x */
5403 thermal_read_mode = TPACPI_THERMAL_ACPI_UPDT;
5404 } else {
5405 /* Standard ACPI TMPx access, max 8 sensors */
5406 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
5407 }
5408 } else {
5409 /* temperatures not supported on 570, G4x, R30, R31, R32 */
5410 thermal_read_mode = TPACPI_THERMAL_NONE;
5411 }
5412
5413 vdbg_printk(TPACPI_DBG_INIT, "thermal is %s, mode %d\n",
5414 str_supported(thermal_read_mode != TPACPI_THERMAL_NONE),
5415 thermal_read_mode);
5416
5417 switch (thermal_read_mode) {
5418 case TPACPI_THERMAL_TPEC_16:
5419 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
5420 &thermal_temp_input16_group);
5421 if (res)
5422 return res;
5423 break;
5424 case TPACPI_THERMAL_TPEC_8:
5425 case TPACPI_THERMAL_ACPI_TMP07:
5426 case TPACPI_THERMAL_ACPI_UPDT:
5427 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
5428 &thermal_temp_input8_group);
5429 if (res)
5430 return res;
5431 break;
5432 case TPACPI_THERMAL_NONE:
5433 default:
5434 return 1;
5435 }
5436
5437 return 0;
5438 }
5439
5440 static void thermal_exit(void)
5441 {
5442 switch (thermal_read_mode) {
5443 case TPACPI_THERMAL_TPEC_16:
5444 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
5445 &thermal_temp_input16_group);
5446 break;
5447 case TPACPI_THERMAL_TPEC_8:
5448 case TPACPI_THERMAL_ACPI_TMP07:
5449 case TPACPI_THERMAL_ACPI_UPDT:
5450 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
5451 &thermal_temp_input16_group);
5452 break;
5453 case TPACPI_THERMAL_NONE:
5454 default:
5455 break;
5456 }
5457 }
5458
5459 static int thermal_read(char *p)
5460 {
5461 int len = 0;
5462 int n, i;
5463 struct ibm_thermal_sensors_struct t;
5464
5465 n = thermal_get_sensors(&t);
5466 if (unlikely(n < 0))
5467 return n;
5468
5469 len += sprintf(p + len, "temperatures:\t");
5470
5471 if (n > 0) {
5472 for (i = 0; i < (n - 1); i++)
5473 len += sprintf(p + len, "%d ", t.temp[i] / 1000);
5474 len += sprintf(p + len, "%d\n", t.temp[i] / 1000);
5475 } else
5476 len += sprintf(p + len, "not supported\n");
5477
5478 return len;
5479 }
5480
5481 static struct ibm_struct thermal_driver_data = {
5482 .name = "thermal",
5483 .read = thermal_read,
5484 .exit = thermal_exit,
5485 };
5486
5487 /*************************************************************************
5488 * EC Dump subdriver
5489 */
5490
5491 static u8 ecdump_regs[256];
5492
5493 static int ecdump_read(char *p)
5494 {
5495 int len = 0;
5496 int i, j;
5497 u8 v;
5498
5499 len += sprintf(p + len, "EC "
5500 " +00 +01 +02 +03 +04 +05 +06 +07"
5501 " +08 +09 +0a +0b +0c +0d +0e +0f\n");
5502 for (i = 0; i < 256; i += 16) {
5503 len += sprintf(p + len, "EC 0x%02x:", i);
5504 for (j = 0; j < 16; j++) {
5505 if (!acpi_ec_read(i + j, &v))
5506 break;
5507 if (v != ecdump_regs[i + j])
5508 len += sprintf(p + len, " *%02x", v);
5509 else
5510 len += sprintf(p + len, " %02x", v);
5511 ecdump_regs[i + j] = v;
5512 }
5513 len += sprintf(p + len, "\n");
5514 if (j != 16)
5515 break;
5516 }
5517
5518 /* These are way too dangerous to advertise openly... */
5519 #if 0
5520 len += sprintf(p + len, "commands:\t0x<offset> 0x<value>"
5521 " (<offset> is 00-ff, <value> is 00-ff)\n");
5522 len += sprintf(p + len, "commands:\t0x<offset> <value> "
5523 " (<offset> is 00-ff, <value> is 0-255)\n");
5524 #endif
5525 return len;
5526 }
5527
5528 static int ecdump_write(char *buf)
5529 {
5530 char *cmd;
5531 int i, v;
5532
5533 while ((cmd = next_cmd(&buf))) {
5534 if (sscanf(cmd, "0x%x 0x%x", &i, &v) == 2) {
5535 /* i and v set */
5536 } else if (sscanf(cmd, "0x%x %u", &i, &v) == 2) {
5537 /* i and v set */
5538 } else
5539 return -EINVAL;
5540 if (i >= 0 && i < 256 && v >= 0 && v < 256) {
5541 if (!acpi_ec_write(i, v))
5542 return -EIO;
5543 } else
5544 return -EINVAL;
5545 }
5546
5547 return 0;
5548 }
5549
5550 static struct ibm_struct ecdump_driver_data = {
5551 .name = "ecdump",
5552 .read = ecdump_read,
5553 .write = ecdump_write,
5554 .flags.experimental = 1,
5555 };
5556
5557 /*************************************************************************
5558 * Backlight/brightness subdriver
5559 */
5560
5561 #define TPACPI_BACKLIGHT_DEV_NAME "thinkpad_screen"
5562
5563 /*
5564 * ThinkPads can read brightness from two places: EC HBRV (0x31), or
5565 * CMOS NVRAM byte 0x5E, bits 0-3.
5566 *
5567 * EC HBRV (0x31) has the following layout
5568 * Bit 7: unknown function
5569 * Bit 6: unknown function
5570 * Bit 5: Z: honour scale changes, NZ: ignore scale changes
5571 * Bit 4: must be set to zero to avoid problems
5572 * Bit 3-0: backlight brightness level
5573 *
5574 * brightness_get_raw returns status data in the HBRV layout
5575 */
5576
5577 enum {
5578 TP_EC_BACKLIGHT = 0x31,
5579
5580 /* TP_EC_BACKLIGHT bitmasks */
5581 TP_EC_BACKLIGHT_LVLMSK = 0x1F,
5582 TP_EC_BACKLIGHT_CMDMSK = 0xE0,
5583 TP_EC_BACKLIGHT_MAPSW = 0x20,
5584 };
5585
5586 enum tpacpi_brightness_access_mode {
5587 TPACPI_BRGHT_MODE_AUTO = 0, /* Not implemented yet */
5588 TPACPI_BRGHT_MODE_EC, /* EC control */
5589 TPACPI_BRGHT_MODE_UCMS_STEP, /* UCMS step-based control */
5590 TPACPI_BRGHT_MODE_ECNVRAM, /* EC control w/ NVRAM store */
5591 TPACPI_BRGHT_MODE_MAX
5592 };
5593
5594 static struct backlight_device *ibm_backlight_device;
5595
5596 static enum tpacpi_brightness_access_mode brightness_mode =
5597 TPACPI_BRGHT_MODE_MAX;
5598
5599 static unsigned int brightness_enable = 2; /* 2 = auto, 0 = no, 1 = yes */
5600
5601 static struct mutex brightness_mutex;
5602
5603 /* NVRAM brightness access,
5604 * call with brightness_mutex held! */
5605 static unsigned int tpacpi_brightness_nvram_get(void)
5606 {
5607 u8 lnvram;
5608
5609 lnvram = (nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS)
5610 & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
5611 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
5612 lnvram &= (tp_features.bright_16levels) ? 0x0f : 0x07;
5613
5614 return lnvram;
5615 }
5616
5617 static void tpacpi_brightness_checkpoint_nvram(void)
5618 {
5619 u8 lec = 0;
5620 u8 b_nvram;
5621
5622 if (brightness_mode != TPACPI_BRGHT_MODE_ECNVRAM)
5623 return;
5624
5625 vdbg_printk(TPACPI_DBG_BRGHT,
5626 "trying to checkpoint backlight level to NVRAM...\n");
5627
5628 if (mutex_lock_killable(&brightness_mutex) < 0)
5629 return;
5630
5631 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
5632 goto unlock;
5633 lec &= TP_EC_BACKLIGHT_LVLMSK;
5634 b_nvram = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS);
5635
5636 if (lec != ((b_nvram & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
5637 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS)) {
5638 /* NVRAM needs update */
5639 b_nvram &= ~(TP_NVRAM_MASK_LEVEL_BRIGHTNESS <<
5640 TP_NVRAM_POS_LEVEL_BRIGHTNESS);
5641 b_nvram |= lec;
5642 nvram_write_byte(b_nvram, TP_NVRAM_ADDR_BRIGHTNESS);
5643 dbg_printk(TPACPI_DBG_BRGHT,
5644 "updated NVRAM backlight level to %u (0x%02x)\n",
5645 (unsigned int) lec, (unsigned int) b_nvram);
5646 } else
5647 vdbg_printk(TPACPI_DBG_BRGHT,
5648 "NVRAM backlight level already is %u (0x%02x)\n",
5649 (unsigned int) lec, (unsigned int) b_nvram);
5650
5651 unlock:
5652 mutex_unlock(&brightness_mutex);
5653 }
5654
5655
5656 /* call with brightness_mutex held! */
5657 static int tpacpi_brightness_get_raw(int *status)
5658 {
5659 u8 lec = 0;
5660
5661 switch (brightness_mode) {
5662 case TPACPI_BRGHT_MODE_UCMS_STEP:
5663 *status = tpacpi_brightness_nvram_get();
5664 return 0;
5665 case TPACPI_BRGHT_MODE_EC:
5666 case TPACPI_BRGHT_MODE_ECNVRAM:
5667 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
5668 return -EIO;
5669 *status = lec;
5670 return 0;
5671 default:
5672 return -ENXIO;
5673 }
5674 }
5675
5676 /* call with brightness_mutex held! */
5677 /* do NOT call with illegal backlight level value */
5678 static int tpacpi_brightness_set_ec(unsigned int value)
5679 {
5680 u8 lec = 0;
5681
5682 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
5683 return -EIO;
5684
5685 if (unlikely(!acpi_ec_write(TP_EC_BACKLIGHT,
5686 (lec & TP_EC_BACKLIGHT_CMDMSK) |
5687 (value & TP_EC_BACKLIGHT_LVLMSK))))
5688 return -EIO;
5689
5690 return 0;
5691 }
5692
5693 /* call with brightness_mutex held! */
5694 static int tpacpi_brightness_set_ucmsstep(unsigned int value)
5695 {
5696 int cmos_cmd, inc;
5697 unsigned int current_value, i;
5698
5699 current_value = tpacpi_brightness_nvram_get();
5700
5701 if (value == current_value)
5702 return 0;
5703
5704 cmos_cmd = (value > current_value) ?
5705 TP_CMOS_BRIGHTNESS_UP :
5706 TP_CMOS_BRIGHTNESS_DOWN;
5707 inc = (value > current_value) ? 1 : -1;
5708
5709 for (i = current_value; i != value; i += inc)
5710 if (issue_thinkpad_cmos_command(cmos_cmd))
5711 return -EIO;
5712
5713 return 0;
5714 }
5715
5716 /* May return EINTR which can always be mapped to ERESTARTSYS */
5717 static int brightness_set(unsigned int value)
5718 {
5719 int res;
5720
5721 if (value > ((tp_features.bright_16levels)? 15 : 7) ||
5722 value < 0)
5723 return -EINVAL;
5724
5725 vdbg_printk(TPACPI_DBG_BRGHT,
5726 "set backlight level to %d\n", value);
5727
5728 res = mutex_lock_killable(&brightness_mutex);
5729 if (res < 0)
5730 return res;
5731
5732 switch (brightness_mode) {
5733 case TPACPI_BRGHT_MODE_EC:
5734 case TPACPI_BRGHT_MODE_ECNVRAM:
5735 res = tpacpi_brightness_set_ec(value);
5736 break;
5737 case TPACPI_BRGHT_MODE_UCMS_STEP:
5738 res = tpacpi_brightness_set_ucmsstep(value);
5739 break;
5740 default:
5741 res = -ENXIO;
5742 }
5743
5744 mutex_unlock(&brightness_mutex);
5745 return res;
5746 }
5747
5748 /* sysfs backlight class ----------------------------------------------- */
5749
5750 static int brightness_update_status(struct backlight_device *bd)
5751 {
5752 unsigned int level =
5753 (bd->props.fb_blank == FB_BLANK_UNBLANK &&
5754 bd->props.power == FB_BLANK_UNBLANK) ?
5755 bd->props.brightness : 0;
5756
5757 dbg_printk(TPACPI_DBG_BRGHT,
5758 "backlight: attempt to set level to %d\n",
5759 level);
5760
5761 /* it is the backlight class's job (caller) to handle
5762 * EINTR and other errors properly */
5763 return brightness_set(level);
5764 }
5765
5766 static int brightness_get(struct backlight_device *bd)
5767 {
5768 int status, res;
5769
5770 res = mutex_lock_killable(&brightness_mutex);
5771 if (res < 0)
5772 return 0;
5773
5774 res = tpacpi_brightness_get_raw(&status);
5775
5776 mutex_unlock(&brightness_mutex);
5777
5778 if (res < 0)
5779 return 0;
5780
5781 return status & TP_EC_BACKLIGHT_LVLMSK;
5782 }
5783
5784 static struct backlight_ops ibm_backlight_data = {
5785 .get_brightness = brightness_get,
5786 .update_status = brightness_update_status,
5787 };
5788
5789 /* --------------------------------------------------------------------- */
5790
5791 static int __init brightness_init(struct ibm_init_struct *iibm)
5792 {
5793 int b;
5794
5795 vdbg_printk(TPACPI_DBG_INIT, "initializing brightness subdriver\n");
5796
5797 mutex_init(&brightness_mutex);
5798
5799 /*
5800 * We always attempt to detect acpi support, so as to switch
5801 * Lenovo Vista BIOS to ACPI brightness mode even if we are not
5802 * going to publish a backlight interface
5803 */
5804 b = tpacpi_check_std_acpi_brightness_support();
5805 if (b > 0) {
5806
5807 if (acpi_video_backlight_support()) {
5808 if (brightness_enable > 1) {
5809 printk(TPACPI_NOTICE
5810 "Standard ACPI backlight interface "
5811 "available, not loading native one.\n");
5812 return 1;
5813 } else if (brightness_enable == 1) {
5814 printk(TPACPI_NOTICE
5815 "Backlight control force enabled, even if standard "
5816 "ACPI backlight interface is available\n");
5817 }
5818 } else {
5819 if (brightness_enable > 1) {
5820 printk(TPACPI_NOTICE
5821 "Standard ACPI backlight interface not "
5822 "available, thinkpad_acpi native "
5823 "brightness control enabled\n");
5824 }
5825 }
5826 }
5827
5828 if (!brightness_enable) {
5829 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT,
5830 "brightness support disabled by "
5831 "module parameter\n");
5832 return 1;
5833 }
5834
5835 if (b > 16) {
5836 printk(TPACPI_ERR
5837 "Unsupported brightness interface, "
5838 "please contact %s\n", TPACPI_MAIL);
5839 return 1;
5840 }
5841 if (b == 16)
5842 tp_features.bright_16levels = 1;
5843
5844 /*
5845 * Check for module parameter bogosity, note that we
5846 * init brightness_mode to TPACPI_BRGHT_MODE_MAX in order to be
5847 * able to detect "unspecified"
5848 */
5849 if (brightness_mode > TPACPI_BRGHT_MODE_MAX)
5850 return -EINVAL;
5851
5852 /* TPACPI_BRGHT_MODE_AUTO not implemented yet, just use default */
5853 if (brightness_mode == TPACPI_BRGHT_MODE_AUTO ||
5854 brightness_mode == TPACPI_BRGHT_MODE_MAX) {
5855 if (thinkpad_id.vendor == PCI_VENDOR_ID_IBM) {
5856 /*
5857 * IBM models that define HBRV probably have
5858 * EC-based backlight level control
5859 */
5860 if (acpi_evalf(ec_handle, NULL, "HBRV", "qd"))
5861 /* T40-T43, R50-R52, R50e, R51e, X31-X41 */
5862 brightness_mode = TPACPI_BRGHT_MODE_ECNVRAM;
5863 else
5864 /* all other IBM ThinkPads */
5865 brightness_mode = TPACPI_BRGHT_MODE_UCMS_STEP;
5866 } else
5867 /* All Lenovo ThinkPads */
5868 brightness_mode = TPACPI_BRGHT_MODE_UCMS_STEP;
5869
5870 dbg_printk(TPACPI_DBG_BRGHT,
5871 "selected brightness_mode=%d\n",
5872 brightness_mode);
5873 }
5874
5875 if (tpacpi_brightness_get_raw(&b) < 0)
5876 return 1;
5877
5878 if (tp_features.bright_16levels)
5879 printk(TPACPI_INFO
5880 "detected a 16-level brightness capable ThinkPad\n");
5881
5882 ibm_backlight_device = backlight_device_register(
5883 TPACPI_BACKLIGHT_DEV_NAME, NULL, NULL,
5884 &ibm_backlight_data);
5885 if (IS_ERR(ibm_backlight_device)) {
5886 printk(TPACPI_ERR "Could not register backlight device\n");
5887 return PTR_ERR(ibm_backlight_device);
5888 }
5889 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT,
5890 "brightness is supported\n");
5891
5892 ibm_backlight_device->props.max_brightness =
5893 (tp_features.bright_16levels)? 15 : 7;
5894 ibm_backlight_device->props.brightness = b & TP_EC_BACKLIGHT_LVLMSK;
5895 backlight_update_status(ibm_backlight_device);
5896
5897 return 0;
5898 }
5899
5900 static void brightness_suspend(pm_message_t state)
5901 {
5902 tpacpi_brightness_checkpoint_nvram();
5903 }
5904
5905 static void brightness_shutdown(void)
5906 {
5907 tpacpi_brightness_checkpoint_nvram();
5908 }
5909
5910 static void brightness_exit(void)
5911 {
5912 if (ibm_backlight_device) {
5913 vdbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_BRGHT,
5914 "calling backlight_device_unregister()\n");
5915 backlight_device_unregister(ibm_backlight_device);
5916 }
5917
5918 tpacpi_brightness_checkpoint_nvram();
5919 }
5920
5921 static int brightness_read(char *p)
5922 {
5923 int len = 0;
5924 int level;
5925
5926 level = brightness_get(NULL);
5927 if (level < 0) {
5928 len += sprintf(p + len, "level:\t\tunreadable\n");
5929 } else {
5930 len += sprintf(p + len, "level:\t\t%d\n", level);
5931 len += sprintf(p + len, "commands:\tup, down\n");
5932 len += sprintf(p + len, "commands:\tlevel <level>"
5933 " (<level> is 0-%d)\n",
5934 (tp_features.bright_16levels) ? 15 : 7);
5935 }
5936
5937 return len;
5938 }
5939
5940 static int brightness_write(char *buf)
5941 {
5942 int level;
5943 int rc;
5944 char *cmd;
5945 int max_level = (tp_features.bright_16levels) ? 15 : 7;
5946
5947 level = brightness_get(NULL);
5948 if (level < 0)
5949 return level;
5950
5951 while ((cmd = next_cmd(&buf))) {
5952 if (strlencmp(cmd, "up") == 0) {
5953 if (level < max_level)
5954 level++;
5955 } else if (strlencmp(cmd, "down") == 0) {
5956 if (level > 0)
5957 level--;
5958 } else if (sscanf(cmd, "level %d", &level) == 1 &&
5959 level >= 0 && level <= max_level) {
5960 /* new level set */
5961 } else
5962 return -EINVAL;
5963 }
5964
5965 tpacpi_disclose_usertask("procfs brightness",
5966 "set level to %d\n", level);
5967
5968 /*
5969 * Now we know what the final level should be, so we try to set it.
5970 * Doing it this way makes the syscall restartable in case of EINTR
5971 */
5972 rc = brightness_set(level);
5973 return (rc == -EINTR)? ERESTARTSYS : rc;
5974 }
5975
5976 static struct ibm_struct brightness_driver_data = {
5977 .name = "brightness",
5978 .read = brightness_read,
5979 .write = brightness_write,
5980 .exit = brightness_exit,
5981 .suspend = brightness_suspend,
5982 .shutdown = brightness_shutdown,
5983 };
5984
5985 /*************************************************************************
5986 * Volume subdriver
5987 */
5988
5989 static int volume_offset = 0x30;
5990
5991 static int volume_read(char *p)
5992 {
5993 int len = 0;
5994 u8 level;
5995
5996 if (!acpi_ec_read(volume_offset, &level)) {
5997 len += sprintf(p + len, "level:\t\tunreadable\n");
5998 } else {
5999 len += sprintf(p + len, "level:\t\t%d\n", level & 0xf);
6000 len += sprintf(p + len, "mute:\t\t%s\n", onoff(level, 6));
6001 len += sprintf(p + len, "commands:\tup, down, mute\n");
6002 len += sprintf(p + len, "commands:\tlevel <level>"
6003 " (<level> is 0-15)\n");
6004 }
6005
6006 return len;
6007 }
6008
6009 static int volume_write(char *buf)
6010 {
6011 int cmos_cmd, inc, i;
6012 u8 level, mute;
6013 int new_level, new_mute;
6014 char *cmd;
6015
6016 while ((cmd = next_cmd(&buf))) {
6017 if (!acpi_ec_read(volume_offset, &level))
6018 return -EIO;
6019 new_mute = mute = level & 0x40;
6020 new_level = level = level & 0xf;
6021
6022 if (strlencmp(cmd, "up") == 0) {
6023 if (mute)
6024 new_mute = 0;
6025 else
6026 new_level = level == 15 ? 15 : level + 1;
6027 } else if (strlencmp(cmd, "down") == 0) {
6028 if (mute)
6029 new_mute = 0;
6030 else
6031 new_level = level == 0 ? 0 : level - 1;
6032 } else if (sscanf(cmd, "level %d", &new_level) == 1 &&
6033 new_level >= 0 && new_level <= 15) {
6034 /* new_level set */
6035 } else if (strlencmp(cmd, "mute") == 0) {
6036 new_mute = 0x40;
6037 } else
6038 return -EINVAL;
6039
6040 if (new_level != level) {
6041 /* mute doesn't change */
6042
6043 cmos_cmd = (new_level > level) ?
6044 TP_CMOS_VOLUME_UP : TP_CMOS_VOLUME_DOWN;
6045 inc = new_level > level ? 1 : -1;
6046
6047 if (mute && (issue_thinkpad_cmos_command(cmos_cmd) ||
6048 !acpi_ec_write(volume_offset, level)))
6049 return -EIO;
6050
6051 for (i = level; i != new_level; i += inc)
6052 if (issue_thinkpad_cmos_command(cmos_cmd) ||
6053 !acpi_ec_write(volume_offset, i + inc))
6054 return -EIO;
6055
6056 if (mute &&
6057 (issue_thinkpad_cmos_command(TP_CMOS_VOLUME_MUTE) ||
6058 !acpi_ec_write(volume_offset, new_level + mute))) {
6059 return -EIO;
6060 }
6061 }
6062
6063 if (new_mute != mute) {
6064 /* level doesn't change */
6065
6066 cmos_cmd = (new_mute) ?
6067 TP_CMOS_VOLUME_MUTE : TP_CMOS_VOLUME_UP;
6068
6069 if (issue_thinkpad_cmos_command(cmos_cmd) ||
6070 !acpi_ec_write(volume_offset, level + new_mute))
6071 return -EIO;
6072 }
6073 }
6074
6075 return 0;
6076 }
6077
6078 static struct ibm_struct volume_driver_data = {
6079 .name = "volume",
6080 .read = volume_read,
6081 .write = volume_write,
6082 };
6083
6084 /*************************************************************************
6085 * Fan subdriver
6086 */
6087
6088 /*
6089 * FAN ACCESS MODES
6090 *
6091 * TPACPI_FAN_RD_ACPI_GFAN:
6092 * ACPI GFAN method: returns fan level
6093 *
6094 * see TPACPI_FAN_WR_ACPI_SFAN
6095 * EC 0x2f (HFSP) not available if GFAN exists
6096 *
6097 * TPACPI_FAN_WR_ACPI_SFAN:
6098 * ACPI SFAN method: sets fan level, 0 (stop) to 7 (max)
6099 *
6100 * EC 0x2f (HFSP) might be available *for reading*, but do not use
6101 * it for writing.
6102 *
6103 * TPACPI_FAN_WR_TPEC:
6104 * ThinkPad EC register 0x2f (HFSP): fan control loop mode
6105 * Supported on almost all ThinkPads
6106 *
6107 * Fan speed changes of any sort (including those caused by the
6108 * disengaged mode) are usually done slowly by the firmware as the
6109 * maximum ammount of fan duty cycle change per second seems to be
6110 * limited.
6111 *
6112 * Reading is not available if GFAN exists.
6113 * Writing is not available if SFAN exists.
6114 *
6115 * Bits
6116 * 7 automatic mode engaged;
6117 * (default operation mode of the ThinkPad)
6118 * fan level is ignored in this mode.
6119 * 6 full speed mode (takes precedence over bit 7);
6120 * not available on all thinkpads. May disable
6121 * the tachometer while the fan controller ramps up
6122 * the speed (which can take up to a few *minutes*).
6123 * Speeds up fan to 100% duty-cycle, which is far above
6124 * the standard RPM levels. It is not impossible that
6125 * it could cause hardware damage.
6126 * 5-3 unused in some models. Extra bits for fan level
6127 * in others, but still useless as all values above
6128 * 7 map to the same speed as level 7 in these models.
6129 * 2-0 fan level (0..7 usually)
6130 * 0x00 = stop
6131 * 0x07 = max (set when temperatures critical)
6132 * Some ThinkPads may have other levels, see
6133 * TPACPI_FAN_WR_ACPI_FANS (X31/X40/X41)
6134 *
6135 * FIRMWARE BUG: on some models, EC 0x2f might not be initialized at
6136 * boot. Apparently the EC does not intialize it, so unless ACPI DSDT
6137 * does so, its initial value is meaningless (0x07).
6138 *
6139 * For firmware bugs, refer to:
6140 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
6141 *
6142 * ----
6143 *
6144 * ThinkPad EC register 0x84 (LSB), 0x85 (MSB):
6145 * Main fan tachometer reading (in RPM)
6146 *
6147 * This register is present on all ThinkPads with a new-style EC, and
6148 * it is known not to be present on the A21m/e, and T22, as there is
6149 * something else in offset 0x84 according to the ACPI DSDT. Other
6150 * ThinkPads from this same time period (and earlier) probably lack the
6151 * tachometer as well.
6152 *
6153 * Unfortunately a lot of ThinkPads with new-style ECs but whose firmware
6154 * was never fixed by IBM to report the EC firmware version string
6155 * probably support the tachometer (like the early X models), so
6156 * detecting it is quite hard. We need more data to know for sure.
6157 *
6158 * FIRMWARE BUG: always read 0x84 first, otherwise incorrect readings
6159 * might result.
6160 *
6161 * FIRMWARE BUG: may go stale while the EC is switching to full speed
6162 * mode.
6163 *
6164 * For firmware bugs, refer to:
6165 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
6166 *
6167 * TPACPI_FAN_WR_ACPI_FANS:
6168 * ThinkPad X31, X40, X41. Not available in the X60.
6169 *
6170 * FANS ACPI handle: takes three arguments: low speed, medium speed,
6171 * high speed. ACPI DSDT seems to map these three speeds to levels
6172 * as follows: STOP LOW LOW MED MED HIGH HIGH HIGH HIGH
6173 * (this map is stored on FAN0..FAN8 as "0,1,1,2,2,3,3,3,3")
6174 *
6175 * The speeds are stored on handles
6176 * (FANA:FAN9), (FANC:FANB), (FANE:FAND).
6177 *
6178 * There are three default speed sets, acessible as handles:
6179 * FS1L,FS1M,FS1H; FS2L,FS2M,FS2H; FS3L,FS3M,FS3H
6180 *
6181 * ACPI DSDT switches which set is in use depending on various
6182 * factors.
6183 *
6184 * TPACPI_FAN_WR_TPEC is also available and should be used to
6185 * command the fan. The X31/X40/X41 seems to have 8 fan levels,
6186 * but the ACPI tables just mention level 7.
6187 */
6188
6189 enum { /* Fan control constants */
6190 fan_status_offset = 0x2f, /* EC register 0x2f */
6191 fan_rpm_offset = 0x84, /* EC register 0x84: LSB, 0x85 MSB (RPM)
6192 * 0x84 must be read before 0x85 */
6193
6194 TP_EC_FAN_FULLSPEED = 0x40, /* EC fan mode: full speed */
6195 TP_EC_FAN_AUTO = 0x80, /* EC fan mode: auto fan control */
6196
6197 TPACPI_FAN_LAST_LEVEL = 0x100, /* Use cached last-seen fan level */
6198 };
6199
6200 enum fan_status_access_mode {
6201 TPACPI_FAN_NONE = 0, /* No fan status or control */
6202 TPACPI_FAN_RD_ACPI_GFAN, /* Use ACPI GFAN */
6203 TPACPI_FAN_RD_TPEC, /* Use ACPI EC regs 0x2f, 0x84-0x85 */
6204 };
6205
6206 enum fan_control_access_mode {
6207 TPACPI_FAN_WR_NONE = 0, /* No fan control */
6208 TPACPI_FAN_WR_ACPI_SFAN, /* Use ACPI SFAN */
6209 TPACPI_FAN_WR_TPEC, /* Use ACPI EC reg 0x2f */
6210 TPACPI_FAN_WR_ACPI_FANS, /* Use ACPI FANS and EC reg 0x2f */
6211 };
6212
6213 enum fan_control_commands {
6214 TPACPI_FAN_CMD_SPEED = 0x0001, /* speed command */
6215 TPACPI_FAN_CMD_LEVEL = 0x0002, /* level command */
6216 TPACPI_FAN_CMD_ENABLE = 0x0004, /* enable/disable cmd,
6217 * and also watchdog cmd */
6218 };
6219
6220 static int fan_control_allowed;
6221
6222 static enum fan_status_access_mode fan_status_access_mode;
6223 static enum fan_control_access_mode fan_control_access_mode;
6224 static enum fan_control_commands fan_control_commands;
6225
6226 static u8 fan_control_initial_status;
6227 static u8 fan_control_desired_level;
6228 static u8 fan_control_resume_level;
6229 static int fan_watchdog_maxinterval;
6230
6231 static struct mutex fan_mutex;
6232
6233 static void fan_watchdog_fire(struct work_struct *ignored);
6234 static DECLARE_DELAYED_WORK(fan_watchdog_task, fan_watchdog_fire);
6235
6236 TPACPI_HANDLE(fans, ec, "FANS"); /* X31, X40, X41 */
6237 TPACPI_HANDLE(gfan, ec, "GFAN", /* 570 */
6238 "\\FSPD", /* 600e/x, 770e, 770x */
6239 ); /* all others */
6240 TPACPI_HANDLE(sfan, ec, "SFAN", /* 570 */
6241 "JFNS", /* 770x-JL */
6242 ); /* all others */
6243
6244 /*
6245 * Unitialized HFSP quirk: ACPI DSDT and EC fail to initialize the
6246 * HFSP register at boot, so it contains 0x07 but the Thinkpad could
6247 * be in auto mode (0x80).
6248 *
6249 * This is corrected by any write to HFSP either by the driver, or
6250 * by the firmware.
6251 *
6252 * We assume 0x07 really means auto mode while this quirk is active,
6253 * as this is far more likely than the ThinkPad being in level 7,
6254 * which is only used by the firmware during thermal emergencies.
6255 */
6256
6257 static void fan_quirk1_detect(void)
6258 {
6259 /* In some ThinkPads, neither the EC nor the ACPI
6260 * DSDT initialize the HFSP register, and it ends up
6261 * being initially set to 0x07 when it *could* be
6262 * either 0x07 or 0x80.
6263 *
6264 * Enable for TP-1Y (T43), TP-78 (R51e),
6265 * TP-76 (R52), TP-70 (T43, R52), which are known
6266 * to be buggy. */
6267 if (fan_control_initial_status == 0x07) {
6268 switch (thinkpad_id.ec_model) {
6269 case 0x5931: /* TP-1Y */
6270 case 0x3837: /* TP-78 */
6271 case 0x3637: /* TP-76 */
6272 case 0x3037: /* TP-70 */
6273 printk(TPACPI_NOTICE
6274 "fan_init: initial fan status is unknown, "
6275 "assuming it is in auto mode\n");
6276 tp_features.fan_ctrl_status_undef = 1;
6277 ;;
6278 }
6279 }
6280 }
6281
6282 static void fan_quirk1_handle(u8 *fan_status)
6283 {
6284 if (unlikely(tp_features.fan_ctrl_status_undef)) {
6285 if (*fan_status != fan_control_initial_status) {
6286 /* something changed the HFSP regisnter since
6287 * driver init time, so it is not undefined
6288 * anymore */
6289 tp_features.fan_ctrl_status_undef = 0;
6290 } else {
6291 /* Return most likely status. In fact, it
6292 * might be the only possible status */
6293 *fan_status = TP_EC_FAN_AUTO;
6294 }
6295 }
6296 }
6297
6298 /*
6299 * Call with fan_mutex held
6300 */
6301 static void fan_update_desired_level(u8 status)
6302 {
6303 if ((status &
6304 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
6305 if (status > 7)
6306 fan_control_desired_level = 7;
6307 else
6308 fan_control_desired_level = status;
6309 }
6310 }
6311
6312 static int fan_get_status(u8 *status)
6313 {
6314 u8 s;
6315
6316 /* TODO:
6317 * Add TPACPI_FAN_RD_ACPI_FANS ? */
6318
6319 switch (fan_status_access_mode) {
6320 case TPACPI_FAN_RD_ACPI_GFAN:
6321 /* 570, 600e/x, 770e, 770x */
6322
6323 if (unlikely(!acpi_evalf(gfan_handle, &s, NULL, "d")))
6324 return -EIO;
6325
6326 if (likely(status))
6327 *status = s & 0x07;
6328
6329 break;
6330
6331 case TPACPI_FAN_RD_TPEC:
6332 /* all except 570, 600e/x, 770e, 770x */
6333 if (unlikely(!acpi_ec_read(fan_status_offset, &s)))
6334 return -EIO;
6335
6336 if (likely(status)) {
6337 *status = s;
6338 fan_quirk1_handle(status);
6339 }
6340
6341 break;
6342
6343 default:
6344 return -ENXIO;
6345 }
6346
6347 return 0;
6348 }
6349
6350 static int fan_get_status_safe(u8 *status)
6351 {
6352 int rc;
6353 u8 s;
6354
6355 if (mutex_lock_killable(&fan_mutex))
6356 return -ERESTARTSYS;
6357 rc = fan_get_status(&s);
6358 if (!rc)
6359 fan_update_desired_level(s);
6360 mutex_unlock(&fan_mutex);
6361
6362 if (status)
6363 *status = s;
6364
6365 return rc;
6366 }
6367
6368 static int fan_get_speed(unsigned int *speed)
6369 {
6370 u8 hi, lo;
6371
6372 switch (fan_status_access_mode) {
6373 case TPACPI_FAN_RD_TPEC:
6374 /* all except 570, 600e/x, 770e, 770x */
6375 if (unlikely(!acpi_ec_read(fan_rpm_offset, &lo) ||
6376 !acpi_ec_read(fan_rpm_offset + 1, &hi)))
6377 return -EIO;
6378
6379 if (likely(speed))
6380 *speed = (hi << 8) | lo;
6381
6382 break;
6383
6384 default:
6385 return -ENXIO;
6386 }
6387
6388 return 0;
6389 }
6390
6391 static int fan_set_level(int level)
6392 {
6393 if (!fan_control_allowed)
6394 return -EPERM;
6395
6396 switch (fan_control_access_mode) {
6397 case TPACPI_FAN_WR_ACPI_SFAN:
6398 if (level >= 0 && level <= 7) {
6399 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", level))
6400 return -EIO;
6401 } else
6402 return -EINVAL;
6403 break;
6404
6405 case TPACPI_FAN_WR_ACPI_FANS:
6406 case TPACPI_FAN_WR_TPEC:
6407 if (!(level & TP_EC_FAN_AUTO) &&
6408 !(level & TP_EC_FAN_FULLSPEED) &&
6409 ((level < 0) || (level > 7)))
6410 return -EINVAL;
6411
6412 /* safety net should the EC not support AUTO
6413 * or FULLSPEED mode bits and just ignore them */
6414 if (level & TP_EC_FAN_FULLSPEED)
6415 level |= 7; /* safety min speed 7 */
6416 else if (level & TP_EC_FAN_AUTO)
6417 level |= 4; /* safety min speed 4 */
6418
6419 if (!acpi_ec_write(fan_status_offset, level))
6420 return -EIO;
6421 else
6422 tp_features.fan_ctrl_status_undef = 0;
6423 break;
6424
6425 default:
6426 return -ENXIO;
6427 }
6428
6429 vdbg_printk(TPACPI_DBG_FAN,
6430 "fan control: set fan control register to 0x%02x\n", level);
6431 return 0;
6432 }
6433
6434 static int fan_set_level_safe(int level)
6435 {
6436 int rc;
6437
6438 if (!fan_control_allowed)
6439 return -EPERM;
6440
6441 if (mutex_lock_killable(&fan_mutex))
6442 return -ERESTARTSYS;
6443
6444 if (level == TPACPI_FAN_LAST_LEVEL)
6445 level = fan_control_desired_level;
6446
6447 rc = fan_set_level(level);
6448 if (!rc)
6449 fan_update_desired_level(level);
6450
6451 mutex_unlock(&fan_mutex);
6452 return rc;
6453 }
6454
6455 static int fan_set_enable(void)
6456 {
6457 u8 s;
6458 int rc;
6459
6460 if (!fan_control_allowed)
6461 return -EPERM;
6462
6463 if (mutex_lock_killable(&fan_mutex))
6464 return -ERESTARTSYS;
6465
6466 switch (fan_control_access_mode) {
6467 case TPACPI_FAN_WR_ACPI_FANS:
6468 case TPACPI_FAN_WR_TPEC:
6469 rc = fan_get_status(&s);
6470 if (rc < 0)
6471 break;
6472
6473 /* Don't go out of emergency fan mode */
6474 if (s != 7) {
6475 s &= 0x07;
6476 s |= TP_EC_FAN_AUTO | 4; /* min fan speed 4 */
6477 }
6478
6479 if (!acpi_ec_write(fan_status_offset, s))
6480 rc = -EIO;
6481 else {
6482 tp_features.fan_ctrl_status_undef = 0;
6483 rc = 0;
6484 }
6485 break;
6486
6487 case TPACPI_FAN_WR_ACPI_SFAN:
6488 rc = fan_get_status(&s);
6489 if (rc < 0)
6490 break;
6491
6492 s &= 0x07;
6493
6494 /* Set fan to at least level 4 */
6495 s |= 4;
6496
6497 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", s))
6498 rc = -EIO;
6499 else
6500 rc = 0;
6501 break;
6502
6503 default:
6504 rc = -ENXIO;
6505 }
6506
6507 mutex_unlock(&fan_mutex);
6508
6509 if (!rc)
6510 vdbg_printk(TPACPI_DBG_FAN,
6511 "fan control: set fan control register to 0x%02x\n",
6512 s);
6513 return rc;
6514 }
6515
6516 static int fan_set_disable(void)
6517 {
6518 int rc;
6519
6520 if (!fan_control_allowed)
6521 return -EPERM;
6522
6523 if (mutex_lock_killable(&fan_mutex))
6524 return -ERESTARTSYS;
6525
6526 rc = 0;
6527 switch (fan_control_access_mode) {
6528 case TPACPI_FAN_WR_ACPI_FANS:
6529 case TPACPI_FAN_WR_TPEC:
6530 if (!acpi_ec_write(fan_status_offset, 0x00))
6531 rc = -EIO;
6532 else {
6533 fan_control_desired_level = 0;
6534 tp_features.fan_ctrl_status_undef = 0;
6535 }
6536 break;
6537
6538 case TPACPI_FAN_WR_ACPI_SFAN:
6539 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", 0x00))
6540 rc = -EIO;
6541 else
6542 fan_control_desired_level = 0;
6543 break;
6544
6545 default:
6546 rc = -ENXIO;
6547 }
6548
6549 if (!rc)
6550 vdbg_printk(TPACPI_DBG_FAN,
6551 "fan control: set fan control register to 0\n");
6552
6553 mutex_unlock(&fan_mutex);
6554 return rc;
6555 }
6556
6557 static int fan_set_speed(int speed)
6558 {
6559 int rc;
6560
6561 if (!fan_control_allowed)
6562 return -EPERM;
6563
6564 if (mutex_lock_killable(&fan_mutex))
6565 return -ERESTARTSYS;
6566
6567 rc = 0;
6568 switch (fan_control_access_mode) {
6569 case TPACPI_FAN_WR_ACPI_FANS:
6570 if (speed >= 0 && speed <= 65535) {
6571 if (!acpi_evalf(fans_handle, NULL, NULL, "vddd",
6572 speed, speed, speed))
6573 rc = -EIO;
6574 } else
6575 rc = -EINVAL;
6576 break;
6577
6578 default:
6579 rc = -ENXIO;
6580 }
6581
6582 mutex_unlock(&fan_mutex);
6583 return rc;
6584 }
6585
6586 static void fan_watchdog_reset(void)
6587 {
6588 static int fan_watchdog_active;
6589
6590 if (fan_control_access_mode == TPACPI_FAN_WR_NONE)
6591 return;
6592
6593 if (fan_watchdog_active)
6594 cancel_delayed_work(&fan_watchdog_task);
6595
6596 if (fan_watchdog_maxinterval > 0 &&
6597 tpacpi_lifecycle != TPACPI_LIFE_EXITING) {
6598 fan_watchdog_active = 1;
6599 if (!queue_delayed_work(tpacpi_wq, &fan_watchdog_task,
6600 msecs_to_jiffies(fan_watchdog_maxinterval
6601 * 1000))) {
6602 printk(TPACPI_ERR
6603 "failed to queue the fan watchdog, "
6604 "watchdog will not trigger\n");
6605 }
6606 } else
6607 fan_watchdog_active = 0;
6608 }
6609
6610 static void fan_watchdog_fire(struct work_struct *ignored)
6611 {
6612 int rc;
6613
6614 if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
6615 return;
6616
6617 printk(TPACPI_NOTICE "fan watchdog: enabling fan\n");
6618 rc = fan_set_enable();
6619 if (rc < 0) {
6620 printk(TPACPI_ERR "fan watchdog: error %d while enabling fan, "
6621 "will try again later...\n", -rc);
6622 /* reschedule for later */
6623 fan_watchdog_reset();
6624 }
6625 }
6626
6627 /*
6628 * SYSFS fan layout: hwmon compatible (device)
6629 *
6630 * pwm*_enable:
6631 * 0: "disengaged" mode
6632 * 1: manual mode
6633 * 2: native EC "auto" mode (recommended, hardware default)
6634 *
6635 * pwm*: set speed in manual mode, ignored otherwise.
6636 * 0 is level 0; 255 is level 7. Intermediate points done with linear
6637 * interpolation.
6638 *
6639 * fan*_input: tachometer reading, RPM
6640 *
6641 *
6642 * SYSFS fan layout: extensions
6643 *
6644 * fan_watchdog (driver):
6645 * fan watchdog interval in seconds, 0 disables (default), max 120
6646 */
6647
6648 /* sysfs fan pwm1_enable ----------------------------------------------- */
6649 static ssize_t fan_pwm1_enable_show(struct device *dev,
6650 struct device_attribute *attr,
6651 char *buf)
6652 {
6653 int res, mode;
6654 u8 status;
6655
6656 res = fan_get_status_safe(&status);
6657 if (res)
6658 return res;
6659
6660 if (status & TP_EC_FAN_FULLSPEED) {
6661 mode = 0;
6662 } else if (status & TP_EC_FAN_AUTO) {
6663 mode = 2;
6664 } else
6665 mode = 1;
6666
6667 return snprintf(buf, PAGE_SIZE, "%d\n", mode);
6668 }
6669
6670 static ssize_t fan_pwm1_enable_store(struct device *dev,
6671 struct device_attribute *attr,
6672 const char *buf, size_t count)
6673 {
6674 unsigned long t;
6675 int res, level;
6676
6677 if (parse_strtoul(buf, 2, &t))
6678 return -EINVAL;
6679
6680 tpacpi_disclose_usertask("hwmon pwm1_enable",
6681 "set fan mode to %lu\n", t);
6682
6683 switch (t) {
6684 case 0:
6685 level = TP_EC_FAN_FULLSPEED;
6686 break;
6687 case 1:
6688 level = TPACPI_FAN_LAST_LEVEL;
6689 break;
6690 case 2:
6691 level = TP_EC_FAN_AUTO;
6692 break;
6693 case 3:
6694 /* reserved for software-controlled auto mode */
6695 return -ENOSYS;
6696 default:
6697 return -EINVAL;
6698 }
6699
6700 res = fan_set_level_safe(level);
6701 if (res == -ENXIO)
6702 return -EINVAL;
6703 else if (res < 0)
6704 return res;
6705
6706 fan_watchdog_reset();
6707
6708 return count;
6709 }
6710
6711 static struct device_attribute dev_attr_fan_pwm1_enable =
6712 __ATTR(pwm1_enable, S_IWUSR | S_IRUGO,
6713 fan_pwm1_enable_show, fan_pwm1_enable_store);
6714
6715 /* sysfs fan pwm1 ------------------------------------------------------ */
6716 static ssize_t fan_pwm1_show(struct device *dev,
6717 struct device_attribute *attr,
6718 char *buf)
6719 {
6720 int res;
6721 u8 status;
6722
6723 res = fan_get_status_safe(&status);
6724 if (res)
6725 return res;
6726
6727 if ((status &
6728 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) != 0)
6729 status = fan_control_desired_level;
6730
6731 if (status > 7)
6732 status = 7;
6733
6734 return snprintf(buf, PAGE_SIZE, "%u\n", (status * 255) / 7);
6735 }
6736
6737 static ssize_t fan_pwm1_store(struct device *dev,
6738 struct device_attribute *attr,
6739 const char *buf, size_t count)
6740 {
6741 unsigned long s;
6742 int rc;
6743 u8 status, newlevel;
6744
6745 if (parse_strtoul(buf, 255, &s))
6746 return -EINVAL;
6747
6748 tpacpi_disclose_usertask("hwmon pwm1",
6749 "set fan speed to %lu\n", s);
6750
6751 /* scale down from 0-255 to 0-7 */
6752 newlevel = (s >> 5) & 0x07;
6753
6754 if (mutex_lock_killable(&fan_mutex))
6755 return -ERESTARTSYS;
6756
6757 rc = fan_get_status(&status);
6758 if (!rc && (status &
6759 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
6760 rc = fan_set_level(newlevel);
6761 if (rc == -ENXIO)
6762 rc = -EINVAL;
6763 else if (!rc) {
6764 fan_update_desired_level(newlevel);
6765 fan_watchdog_reset();
6766 }
6767 }
6768
6769 mutex_unlock(&fan_mutex);
6770 return (rc)? rc : count;
6771 }
6772
6773 static struct device_attribute dev_attr_fan_pwm1 =
6774 __ATTR(pwm1, S_IWUSR | S_IRUGO,
6775 fan_pwm1_show, fan_pwm1_store);
6776
6777 /* sysfs fan fan1_input ------------------------------------------------ */
6778 static ssize_t fan_fan1_input_show(struct device *dev,
6779 struct device_attribute *attr,
6780 char *buf)
6781 {
6782 int res;
6783 unsigned int speed;
6784
6785 res = fan_get_speed(&speed);
6786 if (res < 0)
6787 return res;
6788
6789 return snprintf(buf, PAGE_SIZE, "%u\n", speed);
6790 }
6791
6792 static struct device_attribute dev_attr_fan_fan1_input =
6793 __ATTR(fan1_input, S_IRUGO,
6794 fan_fan1_input_show, NULL);
6795
6796 /* sysfs fan fan_watchdog (hwmon driver) ------------------------------- */
6797 static ssize_t fan_fan_watchdog_show(struct device_driver *drv,
6798 char *buf)
6799 {
6800 return snprintf(buf, PAGE_SIZE, "%u\n", fan_watchdog_maxinterval);
6801 }
6802
6803 static ssize_t fan_fan_watchdog_store(struct device_driver *drv,
6804 const char *buf, size_t count)
6805 {
6806 unsigned long t;
6807
6808 if (parse_strtoul(buf, 120, &t))
6809 return -EINVAL;
6810
6811 if (!fan_control_allowed)
6812 return -EPERM;
6813
6814 fan_watchdog_maxinterval = t;
6815 fan_watchdog_reset();
6816
6817 tpacpi_disclose_usertask("fan_watchdog", "set to %lu\n", t);
6818
6819 return count;
6820 }
6821
6822 static DRIVER_ATTR(fan_watchdog, S_IWUSR | S_IRUGO,
6823 fan_fan_watchdog_show, fan_fan_watchdog_store);
6824
6825 /* --------------------------------------------------------------------- */
6826 static struct attribute *fan_attributes[] = {
6827 &dev_attr_fan_pwm1_enable.attr, &dev_attr_fan_pwm1.attr,
6828 &dev_attr_fan_fan1_input.attr,
6829 NULL
6830 };
6831
6832 static const struct attribute_group fan_attr_group = {
6833 .attrs = fan_attributes,
6834 };
6835
6836 static int __init fan_init(struct ibm_init_struct *iibm)
6837 {
6838 int rc;
6839
6840 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
6841 "initializing fan subdriver\n");
6842
6843 mutex_init(&fan_mutex);
6844 fan_status_access_mode = TPACPI_FAN_NONE;
6845 fan_control_access_mode = TPACPI_FAN_WR_NONE;
6846 fan_control_commands = 0;
6847 fan_watchdog_maxinterval = 0;
6848 tp_features.fan_ctrl_status_undef = 0;
6849 fan_control_desired_level = 7;
6850
6851 TPACPI_ACPIHANDLE_INIT(fans);
6852 TPACPI_ACPIHANDLE_INIT(gfan);
6853 TPACPI_ACPIHANDLE_INIT(sfan);
6854
6855 if (gfan_handle) {
6856 /* 570, 600e/x, 770e, 770x */
6857 fan_status_access_mode = TPACPI_FAN_RD_ACPI_GFAN;
6858 } else {
6859 /* all other ThinkPads: note that even old-style
6860 * ThinkPad ECs supports the fan control register */
6861 if (likely(acpi_ec_read(fan_status_offset,
6862 &fan_control_initial_status))) {
6863 fan_status_access_mode = TPACPI_FAN_RD_TPEC;
6864 fan_quirk1_detect();
6865 } else {
6866 printk(TPACPI_ERR
6867 "ThinkPad ACPI EC access misbehaving, "
6868 "fan status and control unavailable\n");
6869 return 1;
6870 }
6871 }
6872
6873 if (sfan_handle) {
6874 /* 570, 770x-JL */
6875 fan_control_access_mode = TPACPI_FAN_WR_ACPI_SFAN;
6876 fan_control_commands |=
6877 TPACPI_FAN_CMD_LEVEL | TPACPI_FAN_CMD_ENABLE;
6878 } else {
6879 if (!gfan_handle) {
6880 /* gfan without sfan means no fan control */
6881 /* all other models implement TP EC 0x2f control */
6882
6883 if (fans_handle) {
6884 /* X31, X40, X41 */
6885 fan_control_access_mode =
6886 TPACPI_FAN_WR_ACPI_FANS;
6887 fan_control_commands |=
6888 TPACPI_FAN_CMD_SPEED |
6889 TPACPI_FAN_CMD_LEVEL |
6890 TPACPI_FAN_CMD_ENABLE;
6891 } else {
6892 fan_control_access_mode = TPACPI_FAN_WR_TPEC;
6893 fan_control_commands |=
6894 TPACPI_FAN_CMD_LEVEL |
6895 TPACPI_FAN_CMD_ENABLE;
6896 }
6897 }
6898 }
6899
6900 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
6901 "fan is %s, modes %d, %d\n",
6902 str_supported(fan_status_access_mode != TPACPI_FAN_NONE ||
6903 fan_control_access_mode != TPACPI_FAN_WR_NONE),
6904 fan_status_access_mode, fan_control_access_mode);
6905
6906 /* fan control master switch */
6907 if (!fan_control_allowed) {
6908 fan_control_access_mode = TPACPI_FAN_WR_NONE;
6909 fan_control_commands = 0;
6910 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
6911 "fan control features disabled by parameter\n");
6912 }
6913
6914 /* update fan_control_desired_level */
6915 if (fan_status_access_mode != TPACPI_FAN_NONE)
6916 fan_get_status_safe(NULL);
6917
6918 if (fan_status_access_mode != TPACPI_FAN_NONE ||
6919 fan_control_access_mode != TPACPI_FAN_WR_NONE) {
6920 rc = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
6921 &fan_attr_group);
6922 if (rc < 0)
6923 return rc;
6924
6925 rc = driver_create_file(&tpacpi_hwmon_pdriver.driver,
6926 &driver_attr_fan_watchdog);
6927 if (rc < 0) {
6928 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
6929 &fan_attr_group);
6930 return rc;
6931 }
6932 return 0;
6933 } else
6934 return 1;
6935 }
6936
6937 static void fan_exit(void)
6938 {
6939 vdbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_FAN,
6940 "cancelling any pending fan watchdog tasks\n");
6941
6942 /* FIXME: can we really do this unconditionally? */
6943 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj, &fan_attr_group);
6944 driver_remove_file(&tpacpi_hwmon_pdriver.driver,
6945 &driver_attr_fan_watchdog);
6946
6947 cancel_delayed_work(&fan_watchdog_task);
6948 flush_workqueue(tpacpi_wq);
6949 }
6950
6951 static void fan_suspend(pm_message_t state)
6952 {
6953 int rc;
6954
6955 if (!fan_control_allowed)
6956 return;
6957
6958 /* Store fan status in cache */
6959 fan_control_resume_level = 0;
6960 rc = fan_get_status_safe(&fan_control_resume_level);
6961 if (rc < 0)
6962 printk(TPACPI_NOTICE
6963 "failed to read fan level for later "
6964 "restore during resume: %d\n", rc);
6965
6966 /* if it is undefined, don't attempt to restore it.
6967 * KEEP THIS LAST */
6968 if (tp_features.fan_ctrl_status_undef)
6969 fan_control_resume_level = 0;
6970 }
6971
6972 static void fan_resume(void)
6973 {
6974 u8 current_level = 7;
6975 bool do_set = false;
6976 int rc;
6977
6978 /* DSDT *always* updates status on resume */
6979 tp_features.fan_ctrl_status_undef = 0;
6980
6981 if (!fan_control_allowed ||
6982 !fan_control_resume_level ||
6983 (fan_get_status_safe(&current_level) < 0))
6984 return;
6985
6986 switch (fan_control_access_mode) {
6987 case TPACPI_FAN_WR_ACPI_SFAN:
6988 /* never decrease fan level */
6989 do_set = (fan_control_resume_level > current_level);
6990 break;
6991 case TPACPI_FAN_WR_ACPI_FANS:
6992 case TPACPI_FAN_WR_TPEC:
6993 /* never decrease fan level, scale is:
6994 * TP_EC_FAN_FULLSPEED > 7 >= TP_EC_FAN_AUTO
6995 *
6996 * We expect the firmware to set either 7 or AUTO, but we
6997 * handle FULLSPEED out of paranoia.
6998 *
6999 * So, we can safely only restore FULLSPEED or 7, anything
7000 * else could slow the fan. Restoring AUTO is useless, at
7001 * best that's exactly what the DSDT already set (it is the
7002 * slower it uses).
7003 *
7004 * Always keep in mind that the DSDT *will* have set the
7005 * fans to what the vendor supposes is the best level. We
7006 * muck with it only to speed the fan up.
7007 */
7008 if (fan_control_resume_level != 7 &&
7009 !(fan_control_resume_level & TP_EC_FAN_FULLSPEED))
7010 return;
7011 else
7012 do_set = !(current_level & TP_EC_FAN_FULLSPEED) &&
7013 (current_level != fan_control_resume_level);
7014 break;
7015 default:
7016 return;
7017 }
7018 if (do_set) {
7019 printk(TPACPI_NOTICE
7020 "restoring fan level to 0x%02x\n",
7021 fan_control_resume_level);
7022 rc = fan_set_level_safe(fan_control_resume_level);
7023 if (rc < 0)
7024 printk(TPACPI_NOTICE
7025 "failed to restore fan level: %d\n", rc);
7026 }
7027 }
7028
7029 static int fan_read(char *p)
7030 {
7031 int len = 0;
7032 int rc;
7033 u8 status;
7034 unsigned int speed = 0;
7035
7036 switch (fan_status_access_mode) {
7037 case TPACPI_FAN_RD_ACPI_GFAN:
7038 /* 570, 600e/x, 770e, 770x */
7039 rc = fan_get_status_safe(&status);
7040 if (rc < 0)
7041 return rc;
7042
7043 len += sprintf(p + len, "status:\t\t%s\n"
7044 "level:\t\t%d\n",
7045 (status != 0) ? "enabled" : "disabled", status);
7046 break;
7047
7048 case TPACPI_FAN_RD_TPEC:
7049 /* all except 570, 600e/x, 770e, 770x */
7050 rc = fan_get_status_safe(&status);
7051 if (rc < 0)
7052 return rc;
7053
7054 len += sprintf(p + len, "status:\t\t%s\n",
7055 (status != 0) ? "enabled" : "disabled");
7056
7057 rc = fan_get_speed(&speed);
7058 if (rc < 0)
7059 return rc;
7060
7061 len += sprintf(p + len, "speed:\t\t%d\n", speed);
7062
7063 if (status & TP_EC_FAN_FULLSPEED)
7064 /* Disengaged mode takes precedence */
7065 len += sprintf(p + len, "level:\t\tdisengaged\n");
7066 else if (status & TP_EC_FAN_AUTO)
7067 len += sprintf(p + len, "level:\t\tauto\n");
7068 else
7069 len += sprintf(p + len, "level:\t\t%d\n", status);
7070 break;
7071
7072 case TPACPI_FAN_NONE:
7073 default:
7074 len += sprintf(p + len, "status:\t\tnot supported\n");
7075 }
7076
7077 if (fan_control_commands & TPACPI_FAN_CMD_LEVEL) {
7078 len += sprintf(p + len, "commands:\tlevel <level>");
7079
7080 switch (fan_control_access_mode) {
7081 case TPACPI_FAN_WR_ACPI_SFAN:
7082 len += sprintf(p + len, " (<level> is 0-7)\n");
7083 break;
7084
7085 default:
7086 len += sprintf(p + len, " (<level> is 0-7, "
7087 "auto, disengaged, full-speed)\n");
7088 break;
7089 }
7090 }
7091
7092 if (fan_control_commands & TPACPI_FAN_CMD_ENABLE)
7093 len += sprintf(p + len, "commands:\tenable, disable\n"
7094 "commands:\twatchdog <timeout> (<timeout> "
7095 "is 0 (off), 1-120 (seconds))\n");
7096
7097 if (fan_control_commands & TPACPI_FAN_CMD_SPEED)
7098 len += sprintf(p + len, "commands:\tspeed <speed>"
7099 " (<speed> is 0-65535)\n");
7100
7101 return len;
7102 }
7103
7104 static int fan_write_cmd_level(const char *cmd, int *rc)
7105 {
7106 int level;
7107
7108 if (strlencmp(cmd, "level auto") == 0)
7109 level = TP_EC_FAN_AUTO;
7110 else if ((strlencmp(cmd, "level disengaged") == 0) |
7111 (strlencmp(cmd, "level full-speed") == 0))
7112 level = TP_EC_FAN_FULLSPEED;
7113 else if (sscanf(cmd, "level %d", &level) != 1)
7114 return 0;
7115
7116 *rc = fan_set_level_safe(level);
7117 if (*rc == -ENXIO)
7118 printk(TPACPI_ERR "level command accepted for unsupported "
7119 "access mode %d", fan_control_access_mode);
7120 else if (!*rc)
7121 tpacpi_disclose_usertask("procfs fan",
7122 "set level to %d\n", level);
7123
7124 return 1;
7125 }
7126
7127 static int fan_write_cmd_enable(const char *cmd, int *rc)
7128 {
7129 if (strlencmp(cmd, "enable") != 0)
7130 return 0;
7131
7132 *rc = fan_set_enable();
7133 if (*rc == -ENXIO)
7134 printk(TPACPI_ERR "enable command accepted for unsupported "
7135 "access mode %d", fan_control_access_mode);
7136 else if (!*rc)
7137 tpacpi_disclose_usertask("procfs fan", "enable\n");
7138
7139 return 1;
7140 }
7141
7142 static int fan_write_cmd_disable(const char *cmd, int *rc)
7143 {
7144 if (strlencmp(cmd, "disable") != 0)
7145 return 0;
7146
7147 *rc = fan_set_disable();
7148 if (*rc == -ENXIO)
7149 printk(TPACPI_ERR "disable command accepted for unsupported "
7150 "access mode %d", fan_control_access_mode);
7151 else if (!*rc)
7152 tpacpi_disclose_usertask("procfs fan", "disable\n");
7153
7154 return 1;
7155 }
7156
7157 static int fan_write_cmd_speed(const char *cmd, int *rc)
7158 {
7159 int speed;
7160
7161 /* TODO:
7162 * Support speed <low> <medium> <high> ? */
7163
7164 if (sscanf(cmd, "speed %d", &speed) != 1)
7165 return 0;
7166
7167 *rc = fan_set_speed(speed);
7168 if (*rc == -ENXIO)
7169 printk(TPACPI_ERR "speed command accepted for unsupported "
7170 "access mode %d", fan_control_access_mode);
7171 else if (!*rc)
7172 tpacpi_disclose_usertask("procfs fan",
7173 "set speed to %d\n", speed);
7174
7175 return 1;
7176 }
7177
7178 static int fan_write_cmd_watchdog(const char *cmd, int *rc)
7179 {
7180 int interval;
7181
7182 if (sscanf(cmd, "watchdog %d", &interval) != 1)
7183 return 0;
7184
7185 if (interval < 0 || interval > 120)
7186 *rc = -EINVAL;
7187 else {
7188 fan_watchdog_maxinterval = interval;
7189 tpacpi_disclose_usertask("procfs fan",
7190 "set watchdog timer to %d\n",
7191 interval);
7192 }
7193
7194 return 1;
7195 }
7196
7197 static int fan_write(char *buf)
7198 {
7199 char *cmd;
7200 int rc = 0;
7201
7202 while (!rc && (cmd = next_cmd(&buf))) {
7203 if (!((fan_control_commands & TPACPI_FAN_CMD_LEVEL) &&
7204 fan_write_cmd_level(cmd, &rc)) &&
7205 !((fan_control_commands & TPACPI_FAN_CMD_ENABLE) &&
7206 (fan_write_cmd_enable(cmd, &rc) ||
7207 fan_write_cmd_disable(cmd, &rc) ||
7208 fan_write_cmd_watchdog(cmd, &rc))) &&
7209 !((fan_control_commands & TPACPI_FAN_CMD_SPEED) &&
7210 fan_write_cmd_speed(cmd, &rc))
7211 )
7212 rc = -EINVAL;
7213 else if (!rc)
7214 fan_watchdog_reset();
7215 }
7216
7217 return rc;
7218 }
7219
7220 static struct ibm_struct fan_driver_data = {
7221 .name = "fan",
7222 .read = fan_read,
7223 .write = fan_write,
7224 .exit = fan_exit,
7225 .suspend = fan_suspend,
7226 .resume = fan_resume,
7227 };
7228
7229 /****************************************************************************
7230 ****************************************************************************
7231 *
7232 * Infrastructure
7233 *
7234 ****************************************************************************
7235 ****************************************************************************/
7236
7237 /* sysfs name ---------------------------------------------------------- */
7238 static ssize_t thinkpad_acpi_pdev_name_show(struct device *dev,
7239 struct device_attribute *attr,
7240 char *buf)
7241 {
7242 return snprintf(buf, PAGE_SIZE, "%s\n", TPACPI_NAME);
7243 }
7244
7245 static struct device_attribute dev_attr_thinkpad_acpi_pdev_name =
7246 __ATTR(name, S_IRUGO, thinkpad_acpi_pdev_name_show, NULL);
7247
7248 /* --------------------------------------------------------------------- */
7249
7250 /* /proc support */
7251 static struct proc_dir_entry *proc_dir;
7252
7253 /*
7254 * Module and infrastructure proble, init and exit handling
7255 */
7256
7257 static int force_load;
7258
7259 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
7260 static const char * __init str_supported(int is_supported)
7261 {
7262 static char text_unsupported[] __initdata = "not supported";
7263
7264 return (is_supported)? &text_unsupported[4] : &text_unsupported[0];
7265 }
7266 #endif /* CONFIG_THINKPAD_ACPI_DEBUG */
7267
7268 static void ibm_exit(struct ibm_struct *ibm)
7269 {
7270 dbg_printk(TPACPI_DBG_EXIT, "removing %s\n", ibm->name);
7271
7272 list_del_init(&ibm->all_drivers);
7273
7274 if (ibm->flags.acpi_notify_installed) {
7275 dbg_printk(TPACPI_DBG_EXIT,
7276 "%s: acpi_remove_notify_handler\n", ibm->name);
7277 BUG_ON(!ibm->acpi);
7278 acpi_remove_notify_handler(*ibm->acpi->handle,
7279 ibm->acpi->type,
7280 dispatch_acpi_notify);
7281 ibm->flags.acpi_notify_installed = 0;
7282 ibm->flags.acpi_notify_installed = 0;
7283 }
7284
7285 if (ibm->flags.proc_created) {
7286 dbg_printk(TPACPI_DBG_EXIT,
7287 "%s: remove_proc_entry\n", ibm->name);
7288 remove_proc_entry(ibm->name, proc_dir);
7289 ibm->flags.proc_created = 0;
7290 }
7291
7292 if (ibm->flags.acpi_driver_registered) {
7293 dbg_printk(TPACPI_DBG_EXIT,
7294 "%s: acpi_bus_unregister_driver\n", ibm->name);
7295 BUG_ON(!ibm->acpi);
7296 acpi_bus_unregister_driver(ibm->acpi->driver);
7297 kfree(ibm->acpi->driver);
7298 ibm->acpi->driver = NULL;
7299 ibm->flags.acpi_driver_registered = 0;
7300 }
7301
7302 if (ibm->flags.init_called && ibm->exit) {
7303 ibm->exit();
7304 ibm->flags.init_called = 0;
7305 }
7306
7307 dbg_printk(TPACPI_DBG_INIT, "finished removing %s\n", ibm->name);
7308 }
7309
7310 static int __init ibm_init(struct ibm_init_struct *iibm)
7311 {
7312 int ret;
7313 struct ibm_struct *ibm = iibm->data;
7314 struct proc_dir_entry *entry;
7315
7316 BUG_ON(ibm == NULL);
7317
7318 INIT_LIST_HEAD(&ibm->all_drivers);
7319
7320 if (ibm->flags.experimental && !experimental)
7321 return 0;
7322
7323 dbg_printk(TPACPI_DBG_INIT,
7324 "probing for %s\n", ibm->name);
7325
7326 if (iibm->init) {
7327 ret = iibm->init(iibm);
7328 if (ret > 0)
7329 return 0; /* probe failed */
7330 if (ret)
7331 return ret;
7332
7333 ibm->flags.init_called = 1;
7334 }
7335
7336 if (ibm->acpi) {
7337 if (ibm->acpi->hid) {
7338 ret = register_tpacpi_subdriver(ibm);
7339 if (ret)
7340 goto err_out;
7341 }
7342
7343 if (ibm->acpi->notify) {
7344 ret = setup_acpi_notify(ibm);
7345 if (ret == -ENODEV) {
7346 printk(TPACPI_NOTICE "disabling subdriver %s\n",
7347 ibm->name);
7348 ret = 0;
7349 goto err_out;
7350 }
7351 if (ret < 0)
7352 goto err_out;
7353 }
7354 }
7355
7356 dbg_printk(TPACPI_DBG_INIT,
7357 "%s installed\n", ibm->name);
7358
7359 if (ibm->read) {
7360 entry = create_proc_entry(ibm->name,
7361 S_IFREG | S_IRUGO | S_IWUSR,
7362 proc_dir);
7363 if (!entry) {
7364 printk(TPACPI_ERR "unable to create proc entry %s\n",
7365 ibm->name);
7366 ret = -ENODEV;
7367 goto err_out;
7368 }
7369 entry->data = ibm;
7370 entry->read_proc = &dispatch_procfs_read;
7371 if (ibm->write)
7372 entry->write_proc = &dispatch_procfs_write;
7373 ibm->flags.proc_created = 1;
7374 }
7375
7376 list_add_tail(&ibm->all_drivers, &tpacpi_all_drivers);
7377
7378 return 0;
7379
7380 err_out:
7381 dbg_printk(TPACPI_DBG_INIT,
7382 "%s: at error exit path with result %d\n",
7383 ibm->name, ret);
7384
7385 ibm_exit(ibm);
7386 return (ret < 0)? ret : 0;
7387 }
7388
7389 /* Probing */
7390
7391 /* returns 0 - probe ok, or < 0 - probe error.
7392 * Probe ok doesn't mean thinkpad found.
7393 * On error, kfree() cleanup on tp->* is not performed, caller must do it */
7394 static int __must_check __init get_thinkpad_model_data(
7395 struct thinkpad_id_data *tp)
7396 {
7397 const struct dmi_device *dev = NULL;
7398 char ec_fw_string[18];
7399 char const *s;
7400
7401 if (!tp)
7402 return -EINVAL;
7403
7404 memset(tp, 0, sizeof(*tp));
7405
7406 if (dmi_name_in_vendors("IBM"))
7407 tp->vendor = PCI_VENDOR_ID_IBM;
7408 else if (dmi_name_in_vendors("LENOVO"))
7409 tp->vendor = PCI_VENDOR_ID_LENOVO;
7410 else
7411 return 0;
7412
7413 s = dmi_get_system_info(DMI_BIOS_VERSION);
7414 tp->bios_version_str = kstrdup(s, GFP_KERNEL);
7415 if (s && !tp->bios_version_str)
7416 return -ENOMEM;
7417 if (!tp->bios_version_str)
7418 return 0;
7419 tp->bios_model = tp->bios_version_str[0]
7420 | (tp->bios_version_str[1] << 8);
7421
7422 /*
7423 * ThinkPad T23 or newer, A31 or newer, R50e or newer,
7424 * X32 or newer, all Z series; Some models must have an
7425 * up-to-date BIOS or they will not be detected.
7426 *
7427 * See http://thinkwiki.org/wiki/List_of_DMI_IDs
7428 */
7429 while ((dev = dmi_find_device(DMI_DEV_TYPE_OEM_STRING, NULL, dev))) {
7430 if (sscanf(dev->name,
7431 "IBM ThinkPad Embedded Controller -[%17c",
7432 ec_fw_string) == 1) {
7433 ec_fw_string[sizeof(ec_fw_string) - 1] = 0;
7434 ec_fw_string[strcspn(ec_fw_string, " ]")] = 0;
7435
7436 tp->ec_version_str = kstrdup(ec_fw_string, GFP_KERNEL);
7437 if (!tp->ec_version_str)
7438 return -ENOMEM;
7439 tp->ec_model = ec_fw_string[0]
7440 | (ec_fw_string[1] << 8);
7441 break;
7442 }
7443 }
7444
7445 s = dmi_get_system_info(DMI_PRODUCT_VERSION);
7446 if (s && !strnicmp(s, "ThinkPad", 8)) {
7447 tp->model_str = kstrdup(s, GFP_KERNEL);
7448 if (!tp->model_str)
7449 return -ENOMEM;
7450 }
7451
7452 s = dmi_get_system_info(DMI_PRODUCT_NAME);
7453 tp->nummodel_str = kstrdup(s, GFP_KERNEL);
7454 if (s && !tp->nummodel_str)
7455 return -ENOMEM;
7456
7457 return 0;
7458 }
7459
7460 static int __init probe_for_thinkpad(void)
7461 {
7462 int is_thinkpad;
7463
7464 if (acpi_disabled)
7465 return -ENODEV;
7466
7467 /*
7468 * Non-ancient models have better DMI tagging, but very old models
7469 * don't.
7470 */
7471 is_thinkpad = (thinkpad_id.model_str != NULL);
7472
7473 /* ec is required because many other handles are relative to it */
7474 TPACPI_ACPIHANDLE_INIT(ec);
7475 if (!ec_handle) {
7476 if (is_thinkpad)
7477 printk(TPACPI_ERR
7478 "Not yet supported ThinkPad detected!\n");
7479 return -ENODEV;
7480 }
7481
7482 /*
7483 * Risks a regression on very old machines, but reduces potential
7484 * false positives a damn great deal
7485 */
7486 if (!is_thinkpad)
7487 is_thinkpad = (thinkpad_id.vendor == PCI_VENDOR_ID_IBM);
7488
7489 if (!is_thinkpad && !force_load)
7490 return -ENODEV;
7491
7492 return 0;
7493 }
7494
7495
7496 /* Module init, exit, parameters */
7497
7498 static struct ibm_init_struct ibms_init[] __initdata = {
7499 {
7500 .init = thinkpad_acpi_driver_init,
7501 .data = &thinkpad_acpi_driver_data,
7502 },
7503 {
7504 .init = hotkey_init,
7505 .data = &hotkey_driver_data,
7506 },
7507 {
7508 .init = bluetooth_init,
7509 .data = &bluetooth_driver_data,
7510 },
7511 {
7512 .init = wan_init,
7513 .data = &wan_driver_data,
7514 },
7515 {
7516 .init = uwb_init,
7517 .data = &uwb_driver_data,
7518 },
7519 #ifdef CONFIG_THINKPAD_ACPI_VIDEO
7520 {
7521 .init = video_init,
7522 .data = &video_driver_data,
7523 },
7524 #endif
7525 {
7526 .init = light_init,
7527 .data = &light_driver_data,
7528 },
7529 #ifdef CONFIG_THINKPAD_ACPI_DOCK
7530 {
7531 .init = dock_init,
7532 .data = &dock_driver_data[0],
7533 },
7534 {
7535 .init = dock_init2,
7536 .data = &dock_driver_data[1],
7537 },
7538 #endif
7539 #ifdef CONFIG_THINKPAD_ACPI_BAY
7540 {
7541 .init = bay_init,
7542 .data = &bay_driver_data,
7543 },
7544 #endif
7545 {
7546 .init = cmos_init,
7547 .data = &cmos_driver_data,
7548 },
7549 {
7550 .init = led_init,
7551 .data = &led_driver_data,
7552 },
7553 {
7554 .init = beep_init,
7555 .data = &beep_driver_data,
7556 },
7557 {
7558 .init = thermal_init,
7559 .data = &thermal_driver_data,
7560 },
7561 {
7562 .data = &ecdump_driver_data,
7563 },
7564 {
7565 .init = brightness_init,
7566 .data = &brightness_driver_data,
7567 },
7568 {
7569 .data = &volume_driver_data,
7570 },
7571 {
7572 .init = fan_init,
7573 .data = &fan_driver_data,
7574 },
7575 };
7576
7577 static int __init set_ibm_param(const char *val, struct kernel_param *kp)
7578 {
7579 unsigned int i;
7580 struct ibm_struct *ibm;
7581
7582 if (!kp || !kp->name || !val)
7583 return -EINVAL;
7584
7585 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
7586 ibm = ibms_init[i].data;
7587 WARN_ON(ibm == NULL);
7588
7589 if (!ibm || !ibm->name)
7590 continue;
7591
7592 if (strcmp(ibm->name, kp->name) == 0 && ibm->write) {
7593 if (strlen(val) > sizeof(ibms_init[i].param) - 2)
7594 return -ENOSPC;
7595 strcpy(ibms_init[i].param, val);
7596 strcat(ibms_init[i].param, ",");
7597 return 0;
7598 }
7599 }
7600
7601 return -EINVAL;
7602 }
7603
7604 module_param(experimental, int, 0);
7605 MODULE_PARM_DESC(experimental,
7606 "Enables experimental features when non-zero");
7607
7608 module_param_named(debug, dbg_level, uint, 0);
7609 MODULE_PARM_DESC(debug, "Sets debug level bit-mask");
7610
7611 module_param(force_load, bool, 0);
7612 MODULE_PARM_DESC(force_load,
7613 "Attempts to load the driver even on a "
7614 "mis-identified ThinkPad when true");
7615
7616 module_param_named(fan_control, fan_control_allowed, bool, 0);
7617 MODULE_PARM_DESC(fan_control,
7618 "Enables setting fan parameters features when true");
7619
7620 module_param_named(brightness_mode, brightness_mode, uint, 0);
7621 MODULE_PARM_DESC(brightness_mode,
7622 "Selects brightness control strategy: "
7623 "0=auto, 1=EC, 2=UCMS, 3=EC+NVRAM");
7624
7625 module_param(brightness_enable, uint, 0);
7626 MODULE_PARM_DESC(brightness_enable,
7627 "Enables backlight control when 1, disables when 0");
7628
7629 module_param(hotkey_report_mode, uint, 0);
7630 MODULE_PARM_DESC(hotkey_report_mode,
7631 "used for backwards compatibility with userspace, "
7632 "see documentation");
7633
7634 #define TPACPI_PARAM(feature) \
7635 module_param_call(feature, set_ibm_param, NULL, NULL, 0); \
7636 MODULE_PARM_DESC(feature, "Simulates thinkpad-acpi procfs command " \
7637 "at module load, see documentation")
7638
7639 TPACPI_PARAM(hotkey);
7640 TPACPI_PARAM(bluetooth);
7641 TPACPI_PARAM(video);
7642 TPACPI_PARAM(light);
7643 #ifdef CONFIG_THINKPAD_ACPI_DOCK
7644 TPACPI_PARAM(dock);
7645 #endif
7646 #ifdef CONFIG_THINKPAD_ACPI_BAY
7647 TPACPI_PARAM(bay);
7648 #endif /* CONFIG_THINKPAD_ACPI_BAY */
7649 TPACPI_PARAM(cmos);
7650 TPACPI_PARAM(led);
7651 TPACPI_PARAM(beep);
7652 TPACPI_PARAM(ecdump);
7653 TPACPI_PARAM(brightness);
7654 TPACPI_PARAM(volume);
7655 TPACPI_PARAM(fan);
7656
7657 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
7658 module_param(dbg_wlswemul, uint, 0);
7659 MODULE_PARM_DESC(dbg_wlswemul, "Enables WLSW emulation");
7660 module_param_named(wlsw_state, tpacpi_wlsw_emulstate, bool, 0);
7661 MODULE_PARM_DESC(wlsw_state,
7662 "Initial state of the emulated WLSW switch");
7663
7664 module_param(dbg_bluetoothemul, uint, 0);
7665 MODULE_PARM_DESC(dbg_bluetoothemul, "Enables bluetooth switch emulation");
7666 module_param_named(bluetooth_state, tpacpi_bluetooth_emulstate, bool, 0);
7667 MODULE_PARM_DESC(bluetooth_state,
7668 "Initial state of the emulated bluetooth switch");
7669
7670 module_param(dbg_wwanemul, uint, 0);
7671 MODULE_PARM_DESC(dbg_wwanemul, "Enables WWAN switch emulation");
7672 module_param_named(wwan_state, tpacpi_wwan_emulstate, bool, 0);
7673 MODULE_PARM_DESC(wwan_state,
7674 "Initial state of the emulated WWAN switch");
7675
7676 module_param(dbg_uwbemul, uint, 0);
7677 MODULE_PARM_DESC(dbg_uwbemul, "Enables UWB switch emulation");
7678 module_param_named(uwb_state, tpacpi_uwb_emulstate, bool, 0);
7679 MODULE_PARM_DESC(uwb_state,
7680 "Initial state of the emulated UWB switch");
7681 #endif
7682
7683 static void thinkpad_acpi_module_exit(void)
7684 {
7685 struct ibm_struct *ibm, *itmp;
7686
7687 tpacpi_lifecycle = TPACPI_LIFE_EXITING;
7688
7689 list_for_each_entry_safe_reverse(ibm, itmp,
7690 &tpacpi_all_drivers,
7691 all_drivers) {
7692 ibm_exit(ibm);
7693 }
7694
7695 dbg_printk(TPACPI_DBG_INIT, "finished subdriver exit path...\n");
7696
7697 if (tpacpi_inputdev) {
7698 if (tp_features.input_device_registered)
7699 input_unregister_device(tpacpi_inputdev);
7700 else
7701 input_free_device(tpacpi_inputdev);
7702 }
7703
7704 if (tpacpi_hwmon)
7705 hwmon_device_unregister(tpacpi_hwmon);
7706
7707 if (tp_features.sensors_pdev_attrs_registered)
7708 device_remove_file(&tpacpi_sensors_pdev->dev,
7709 &dev_attr_thinkpad_acpi_pdev_name);
7710 if (tpacpi_sensors_pdev)
7711 platform_device_unregister(tpacpi_sensors_pdev);
7712 if (tpacpi_pdev)
7713 platform_device_unregister(tpacpi_pdev);
7714
7715 if (tp_features.sensors_pdrv_attrs_registered)
7716 tpacpi_remove_driver_attributes(&tpacpi_hwmon_pdriver.driver);
7717 if (tp_features.platform_drv_attrs_registered)
7718 tpacpi_remove_driver_attributes(&tpacpi_pdriver.driver);
7719
7720 if (tp_features.sensors_pdrv_registered)
7721 platform_driver_unregister(&tpacpi_hwmon_pdriver);
7722
7723 if (tp_features.platform_drv_registered)
7724 platform_driver_unregister(&tpacpi_pdriver);
7725
7726 if (proc_dir)
7727 remove_proc_entry(TPACPI_PROC_DIR, acpi_root_dir);
7728
7729 if (tpacpi_wq)
7730 destroy_workqueue(tpacpi_wq);
7731
7732 kfree(thinkpad_id.bios_version_str);
7733 kfree(thinkpad_id.ec_version_str);
7734 kfree(thinkpad_id.model_str);
7735 }
7736
7737
7738 static int __init thinkpad_acpi_module_init(void)
7739 {
7740 int ret, i;
7741
7742 tpacpi_lifecycle = TPACPI_LIFE_INIT;
7743
7744 /* Parameter checking */
7745 if (hotkey_report_mode > 2)
7746 return -EINVAL;
7747
7748 /* Driver-level probe */
7749
7750 ret = get_thinkpad_model_data(&thinkpad_id);
7751 if (ret) {
7752 printk(TPACPI_ERR
7753 "unable to get DMI data: %d\n", ret);
7754 thinkpad_acpi_module_exit();
7755 return ret;
7756 }
7757 ret = probe_for_thinkpad();
7758 if (ret) {
7759 thinkpad_acpi_module_exit();
7760 return ret;
7761 }
7762
7763 /* Driver initialization */
7764
7765 TPACPI_ACPIHANDLE_INIT(ecrd);
7766 TPACPI_ACPIHANDLE_INIT(ecwr);
7767
7768 tpacpi_wq = create_singlethread_workqueue(TPACPI_WORKQUEUE_NAME);
7769 if (!tpacpi_wq) {
7770 thinkpad_acpi_module_exit();
7771 return -ENOMEM;
7772 }
7773
7774 proc_dir = proc_mkdir(TPACPI_PROC_DIR, acpi_root_dir);
7775 if (!proc_dir) {
7776 printk(TPACPI_ERR
7777 "unable to create proc dir " TPACPI_PROC_DIR);
7778 thinkpad_acpi_module_exit();
7779 return -ENODEV;
7780 }
7781
7782 ret = platform_driver_register(&tpacpi_pdriver);
7783 if (ret) {
7784 printk(TPACPI_ERR
7785 "unable to register main platform driver\n");
7786 thinkpad_acpi_module_exit();
7787 return ret;
7788 }
7789 tp_features.platform_drv_registered = 1;
7790
7791 ret = platform_driver_register(&tpacpi_hwmon_pdriver);
7792 if (ret) {
7793 printk(TPACPI_ERR
7794 "unable to register hwmon platform driver\n");
7795 thinkpad_acpi_module_exit();
7796 return ret;
7797 }
7798 tp_features.sensors_pdrv_registered = 1;
7799
7800 ret = tpacpi_create_driver_attributes(&tpacpi_pdriver.driver);
7801 if (!ret) {
7802 tp_features.platform_drv_attrs_registered = 1;
7803 ret = tpacpi_create_driver_attributes(
7804 &tpacpi_hwmon_pdriver.driver);
7805 }
7806 if (ret) {
7807 printk(TPACPI_ERR
7808 "unable to create sysfs driver attributes\n");
7809 thinkpad_acpi_module_exit();
7810 return ret;
7811 }
7812 tp_features.sensors_pdrv_attrs_registered = 1;
7813
7814
7815 /* Device initialization */
7816 tpacpi_pdev = platform_device_register_simple(TPACPI_DRVR_NAME, -1,
7817 NULL, 0);
7818 if (IS_ERR(tpacpi_pdev)) {
7819 ret = PTR_ERR(tpacpi_pdev);
7820 tpacpi_pdev = NULL;
7821 printk(TPACPI_ERR "unable to register platform device\n");
7822 thinkpad_acpi_module_exit();
7823 return ret;
7824 }
7825 tpacpi_sensors_pdev = platform_device_register_simple(
7826 TPACPI_HWMON_DRVR_NAME,
7827 -1, NULL, 0);
7828 if (IS_ERR(tpacpi_sensors_pdev)) {
7829 ret = PTR_ERR(tpacpi_sensors_pdev);
7830 tpacpi_sensors_pdev = NULL;
7831 printk(TPACPI_ERR
7832 "unable to register hwmon platform device\n");
7833 thinkpad_acpi_module_exit();
7834 return ret;
7835 }
7836 ret = device_create_file(&tpacpi_sensors_pdev->dev,
7837 &dev_attr_thinkpad_acpi_pdev_name);
7838 if (ret) {
7839 printk(TPACPI_ERR
7840 "unable to create sysfs hwmon device attributes\n");
7841 thinkpad_acpi_module_exit();
7842 return ret;
7843 }
7844 tp_features.sensors_pdev_attrs_registered = 1;
7845 tpacpi_hwmon = hwmon_device_register(&tpacpi_sensors_pdev->dev);
7846 if (IS_ERR(tpacpi_hwmon)) {
7847 ret = PTR_ERR(tpacpi_hwmon);
7848 tpacpi_hwmon = NULL;
7849 printk(TPACPI_ERR "unable to register hwmon device\n");
7850 thinkpad_acpi_module_exit();
7851 return ret;
7852 }
7853 mutex_init(&tpacpi_inputdev_send_mutex);
7854 tpacpi_inputdev = input_allocate_device();
7855 if (!tpacpi_inputdev) {
7856 printk(TPACPI_ERR "unable to allocate input device\n");
7857 thinkpad_acpi_module_exit();
7858 return -ENOMEM;
7859 } else {
7860 /* Prepare input device, but don't register */
7861 tpacpi_inputdev->name = "ThinkPad Extra Buttons";
7862 tpacpi_inputdev->phys = TPACPI_DRVR_NAME "/input0";
7863 tpacpi_inputdev->id.bustype = BUS_HOST;
7864 tpacpi_inputdev->id.vendor = (thinkpad_id.vendor) ?
7865 thinkpad_id.vendor :
7866 PCI_VENDOR_ID_IBM;
7867 tpacpi_inputdev->id.product = TPACPI_HKEY_INPUT_PRODUCT;
7868 tpacpi_inputdev->id.version = TPACPI_HKEY_INPUT_VERSION;
7869 }
7870 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
7871 ret = ibm_init(&ibms_init[i]);
7872 if (ret >= 0 && *ibms_init[i].param)
7873 ret = ibms_init[i].data->write(ibms_init[i].param);
7874 if (ret < 0) {
7875 thinkpad_acpi_module_exit();
7876 return ret;
7877 }
7878 }
7879 ret = input_register_device(tpacpi_inputdev);
7880 if (ret < 0) {
7881 printk(TPACPI_ERR "unable to register input device\n");
7882 thinkpad_acpi_module_exit();
7883 return ret;
7884 } else {
7885 tp_features.input_device_registered = 1;
7886 }
7887
7888 tpacpi_lifecycle = TPACPI_LIFE_RUNNING;
7889 return 0;
7890 }
7891
7892 MODULE_ALIAS(TPACPI_DRVR_SHORTNAME);
7893
7894 /*
7895 * This will autoload the driver in almost every ThinkPad
7896 * in widespread use.
7897 *
7898 * Only _VERY_ old models, like the 240, 240x and 570 lack
7899 * the HKEY event interface.
7900 */
7901 MODULE_DEVICE_TABLE(acpi, ibm_htk_device_ids);
7902
7903 /*
7904 * DMI matching for module autoloading
7905 *
7906 * See http://thinkwiki.org/wiki/List_of_DMI_IDs
7907 * See http://thinkwiki.org/wiki/BIOS_Upgrade_Downloads
7908 *
7909 * Only models listed in thinkwiki will be supported, so add yours
7910 * if it is not there yet.
7911 */
7912 #define IBM_BIOS_MODULE_ALIAS(__type) \
7913 MODULE_ALIAS("dmi:bvnIBM:bvr" __type "ET??WW*")
7914
7915 /* Ancient thinkpad BIOSes have to be identified by
7916 * BIOS type or model number, and there are far less
7917 * BIOS types than model numbers... */
7918 IBM_BIOS_MODULE_ALIAS("I[MU]"); /* 570, 570e */
7919
7920 MODULE_AUTHOR("Borislav Deianov <borislav@users.sf.net>");
7921 MODULE_AUTHOR("Henrique de Moraes Holschuh <hmh@hmh.eng.br>");
7922 MODULE_DESCRIPTION(TPACPI_DESC);
7923 MODULE_VERSION(TPACPI_VERSION);
7924 MODULE_LICENSE("GPL");
7925
7926 module_init(thinkpad_acpi_module_init);
7927 module_exit(thinkpad_acpi_module_exit);
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