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ACPI: thinkpad-acpi: handle HKEY thermal and battery alarms
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / platform / x86 / thinkpad_acpi.c
blobc4e4b641d95297848d83aaf79257849c5ea08152
1 /*
2 * thinkpad_acpi.c - ThinkPad ACPI Extras
3 *
4 *
5 * Copyright (C) 2004-2005 Borislav Deianov <borislav@users.sf.net>
6 * Copyright (C) 2006-2008 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 "0.21"
25 #define TPACPI_SYSFS_VERSION 0x020200
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/kthread.h>
58 #include <linux/freezer.h>
59 #include <linux/delay.h>
60
61 #include <linux/nvram.h>
62 #include <linux/proc_fs.h>
63 #include <linux/sysfs.h>
64 #include <linux/backlight.h>
65 #include <linux/fb.h>
66 #include <linux/platform_device.h>
67 #include <linux/hwmon.h>
68 #include <linux/hwmon-sysfs.h>
69 #include <linux/input.h>
70 #include <linux/leds.h>
71 #include <linux/rfkill.h>
72 #include <asm/uaccess.h>
73
74 #include <linux/dmi.h>
75 #include <linux/jiffies.h>
76 #include <linux/workqueue.h>
77
78 #include <acpi/acpi_drivers.h>
79
80 #include <linux/pci_ids.h>
81
82
83 /* ThinkPad CMOS commands */
84 #define TP_CMOS_VOLUME_DOWN 0
85 #define TP_CMOS_VOLUME_UP 1
86 #define TP_CMOS_VOLUME_MUTE 2
87 #define TP_CMOS_BRIGHTNESS_UP 4
88 #define TP_CMOS_BRIGHTNESS_DOWN 5
89 #define TP_CMOS_THINKLIGHT_ON 12
90 #define TP_CMOS_THINKLIGHT_OFF 13
91
92 /* NVRAM Addresses */
93 enum tp_nvram_addr {
94 TP_NVRAM_ADDR_HK2 = 0x57,
95 TP_NVRAM_ADDR_THINKLIGHT = 0x58,
96 TP_NVRAM_ADDR_VIDEO = 0x59,
97 TP_NVRAM_ADDR_BRIGHTNESS = 0x5e,
98 TP_NVRAM_ADDR_MIXER = 0x60,
99 };
100
101 /* NVRAM bit masks */
102 enum {
103 TP_NVRAM_MASK_HKT_THINKPAD = 0x08,
104 TP_NVRAM_MASK_HKT_ZOOM = 0x20,
105 TP_NVRAM_MASK_HKT_DISPLAY = 0x40,
106 TP_NVRAM_MASK_HKT_HIBERNATE = 0x80,
107 TP_NVRAM_MASK_THINKLIGHT = 0x10,
108 TP_NVRAM_MASK_HKT_DISPEXPND = 0x30,
109 TP_NVRAM_MASK_HKT_BRIGHTNESS = 0x20,
110 TP_NVRAM_MASK_LEVEL_BRIGHTNESS = 0x0f,
111 TP_NVRAM_POS_LEVEL_BRIGHTNESS = 0,
112 TP_NVRAM_MASK_MUTE = 0x40,
113 TP_NVRAM_MASK_HKT_VOLUME = 0x80,
114 TP_NVRAM_MASK_LEVEL_VOLUME = 0x0f,
115 TP_NVRAM_POS_LEVEL_VOLUME = 0,
116 };
117
118 /* ACPI HIDs */
119 #define TPACPI_ACPI_HKEY_HID "IBM0068"
120
121 /* Input IDs */
122 #define TPACPI_HKEY_INPUT_PRODUCT 0x5054 /* "TP" */
123 #define TPACPI_HKEY_INPUT_VERSION 0x4101
124
125 /* ACPI \WGSV commands */
126 enum {
127 TP_ACPI_WGSV_GET_STATE = 0x01, /* Get state information */
128 TP_ACPI_WGSV_PWR_ON_ON_RESUME = 0x02, /* Resume WWAN powered on */
129 TP_ACPI_WGSV_PWR_OFF_ON_RESUME = 0x03, /* Resume WWAN powered off */
130 TP_ACPI_WGSV_SAVE_STATE = 0x04, /* Save state for S4/S5 */
131 };
132
133 /* TP_ACPI_WGSV_GET_STATE bits */
134 enum {
135 TP_ACPI_WGSV_STATE_WWANEXIST = 0x0001, /* WWAN hw available */
136 TP_ACPI_WGSV_STATE_WWANPWR = 0x0002, /* WWAN radio enabled */
137 TP_ACPI_WGSV_STATE_WWANPWRRES = 0x0004, /* WWAN state at resume */
138 TP_ACPI_WGSV_STATE_WWANBIOSOFF = 0x0008, /* WWAN disabled in BIOS */
139 TP_ACPI_WGSV_STATE_BLTHEXIST = 0x0001, /* BLTH hw available */
140 TP_ACPI_WGSV_STATE_BLTHPWR = 0x0002, /* BLTH radio enabled */
141 TP_ACPI_WGSV_STATE_BLTHPWRRES = 0x0004, /* BLTH state at resume */
142 TP_ACPI_WGSV_STATE_BLTHBIOSOFF = 0x0008, /* BLTH disabled in BIOS */
143 TP_ACPI_WGSV_STATE_UWBEXIST = 0x0010, /* UWB hw available */
144 TP_ACPI_WGSV_STATE_UWBPWR = 0x0020, /* UWB radio enabled */
145 };
146
147 /****************************************************************************
148 * Main driver
149 */
150
151 #define TPACPI_NAME "thinkpad"
152 #define TPACPI_DESC "ThinkPad ACPI Extras"
153 #define TPACPI_FILE TPACPI_NAME "_acpi"
154 #define TPACPI_URL "http://ibm-acpi.sf.net/"
155 #define TPACPI_MAIL "ibm-acpi-devel@lists.sourceforge.net"
156
157 #define TPACPI_PROC_DIR "ibm"
158 #define TPACPI_ACPI_EVENT_PREFIX "ibm"
159 #define TPACPI_DRVR_NAME TPACPI_FILE
160 #define TPACPI_DRVR_SHORTNAME "tpacpi"
161 #define TPACPI_HWMON_DRVR_NAME TPACPI_NAME "_hwmon"
162
163 #define TPACPI_NVRAM_KTHREAD_NAME "ktpacpi_nvramd"
164 #define TPACPI_WORKQUEUE_NAME "ktpacpid"
165
166 #define TPACPI_MAX_ACPI_ARGS 3
167
168 /* rfkill switches */
169 enum {
170 TPACPI_RFK_BLUETOOTH_SW_ID = 0,
171 TPACPI_RFK_WWAN_SW_ID,
172 TPACPI_RFK_UWB_SW_ID,
173 };
174
175 /* Debugging */
176 #define TPACPI_LOG TPACPI_FILE ": "
177 #define TPACPI_ALERT KERN_ALERT TPACPI_LOG
178 #define TPACPI_CRIT KERN_CRIT TPACPI_LOG
179 #define TPACPI_ERR KERN_ERR TPACPI_LOG
180 #define TPACPI_NOTICE KERN_NOTICE TPACPI_LOG
181 #define TPACPI_INFO KERN_INFO TPACPI_LOG
182 #define TPACPI_DEBUG KERN_DEBUG TPACPI_LOG
183
184 #define TPACPI_DBG_ALL 0xffff
185 #define TPACPI_DBG_INIT 0x0001
186 #define TPACPI_DBG_EXIT 0x0002
187 #define dbg_printk(a_dbg_level, format, arg...) \
188 do { if (dbg_level & a_dbg_level) \
189 printk(TPACPI_DEBUG "%s: " format, __func__ , ## arg); \
190 } while (0)
191 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
192 #define vdbg_printk(a_dbg_level, format, arg...) \
193 dbg_printk(a_dbg_level, format, ## arg)
194 static const char *str_supported(int is_supported);
195 #else
196 #define vdbg_printk(a_dbg_level, format, arg...)
197 #endif
198
199 #define onoff(status, bit) ((status) & (1 << (bit)) ? "on" : "off")
200 #define enabled(status, bit) ((status) & (1 << (bit)) ? "enabled" : "disabled")
201 #define strlencmp(a, b) (strncmp((a), (b), strlen(b)))
202
203
204 /****************************************************************************
205 * Driver-wide structs and misc. variables
206 */
207
208 struct ibm_struct;
209
210 struct tp_acpi_drv_struct {
211 const struct acpi_device_id *hid;
212 struct acpi_driver *driver;
213
214 void (*notify) (struct ibm_struct *, u32);
215 acpi_handle *handle;
216 u32 type;
217 struct acpi_device *device;
218 };
219
220 struct ibm_struct {
221 char *name;
222
223 int (*read) (char *);
224 int (*write) (char *);
225 void (*exit) (void);
226 void (*resume) (void);
227 void (*suspend) (pm_message_t state);
228 void (*shutdown) (void);
229
230 struct list_head all_drivers;
231
232 struct tp_acpi_drv_struct *acpi;
233
234 struct {
235 u8 acpi_driver_registered:1;
236 u8 acpi_notify_installed:1;
237 u8 proc_created:1;
238 u8 init_called:1;
239 u8 experimental:1;
240 } flags;
241 };
242
243 struct ibm_init_struct {
244 char param[32];
245
246 int (*init) (struct ibm_init_struct *);
247 struct ibm_struct *data;
248 };
249
250 static struct {
251 #ifdef CONFIG_THINKPAD_ACPI_BAY
252 u32 bay_status:1;
253 u32 bay_eject:1;
254 u32 bay_status2:1;
255 u32 bay_eject2:1;
256 #endif
257 u32 bluetooth:1;
258 u32 hotkey:1;
259 u32 hotkey_mask:1;
260 u32 hotkey_wlsw:1;
261 u32 hotkey_tablet:1;
262 u32 light:1;
263 u32 light_status:1;
264 u32 bright_16levels:1;
265 u32 bright_acpimode:1;
266 u32 wan:1;
267 u32 uwb:1;
268 u32 fan_ctrl_status_undef:1;
269 u32 input_device_registered:1;
270 u32 platform_drv_registered:1;
271 u32 platform_drv_attrs_registered:1;
272 u32 sensors_pdrv_registered:1;
273 u32 sensors_pdrv_attrs_registered:1;
274 u32 sensors_pdev_attrs_registered:1;
275 u32 hotkey_poll_active:1;
276 } tp_features;
277
278 static struct {
279 u16 hotkey_mask_ff:1;
280 u16 bright_cmos_ec_unsync:1;
281 } tp_warned;
282
283 struct thinkpad_id_data {
284 unsigned int vendor; /* ThinkPad vendor:
285 * PCI_VENDOR_ID_IBM/PCI_VENDOR_ID_LENOVO */
286
287 char *bios_version_str; /* Something like 1ZET51WW (1.03z) */
288 char *ec_version_str; /* Something like 1ZHT51WW-1.04a */
289
290 u16 bios_model; /* Big Endian, TP-1Y = 0x5931, 0 = unknown */
291 u16 ec_model;
292
293 char *model_str; /* ThinkPad T43 */
294 char *nummodel_str; /* 9384A9C for a 9384-A9C model */
295 };
296 static struct thinkpad_id_data thinkpad_id;
297
298 static enum {
299 TPACPI_LIFE_INIT = 0,
300 TPACPI_LIFE_RUNNING,
301 TPACPI_LIFE_EXITING,
302 } tpacpi_lifecycle;
303
304 static int experimental;
305 static u32 dbg_level;
306
307 static struct workqueue_struct *tpacpi_wq;
308
309 /* Special LED class that can defer work */
310 struct tpacpi_led_classdev {
311 struct led_classdev led_classdev;
312 struct work_struct work;
313 enum led_brightness new_brightness;
314 unsigned int led;
315 };
316
317 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
318 static int dbg_wlswemul;
319 static int tpacpi_wlsw_emulstate;
320 static int dbg_bluetoothemul;
321 static int tpacpi_bluetooth_emulstate;
322 static int dbg_wwanemul;
323 static int tpacpi_wwan_emulstate;
324 static int dbg_uwbemul;
325 static int tpacpi_uwb_emulstate;
326 #endif
327
328
329 /****************************************************************************
330 ****************************************************************************
331 *
332 * ACPI Helpers and device model
333 *
334 ****************************************************************************
335 ****************************************************************************/
336
337 /*************************************************************************
338 * ACPI basic handles
339 */
340
341 static acpi_handle root_handle;
342
343 #define TPACPI_HANDLE(object, parent, paths...) \
344 static acpi_handle object##_handle; \
345 static acpi_handle *object##_parent = &parent##_handle; \
346 static char *object##_path; \
347 static char *object##_paths[] = { paths }
348
349 TPACPI_HANDLE(ec, root, "\\_SB.PCI0.ISA.EC0", /* 240, 240x */
350 "\\_SB.PCI.ISA.EC", /* 570 */
351 "\\_SB.PCI0.ISA0.EC0", /* 600e/x, 770e, 770x */
352 "\\_SB.PCI0.ISA.EC", /* A21e, A2xm/p, T20-22, X20-21 */
353 "\\_SB.PCI0.AD4S.EC0", /* i1400, R30 */
354 "\\_SB.PCI0.ICH3.EC0", /* R31 */
355 "\\_SB.PCI0.LPC.EC", /* all others */
356 );
357
358 TPACPI_HANDLE(ecrd, ec, "ECRD"); /* 570 */
359 TPACPI_HANDLE(ecwr, ec, "ECWR"); /* 570 */
360
361 TPACPI_HANDLE(cmos, root, "\\UCMS", /* R50, R50e, R50p, R51, */
362 /* T4x, X31, X40 */
363 "\\CMOS", /* A3x, G4x, R32, T23, T30, X22-24, X30 */
364 "\\CMS", /* R40, R40e */
365 ); /* all others */
366
367 TPACPI_HANDLE(hkey, ec, "\\_SB.HKEY", /* 600e/x, 770e, 770x */
368 "^HKEY", /* R30, R31 */
369 "HKEY", /* all others */
370 ); /* 570 */
371
372 TPACPI_HANDLE(vid, root, "\\_SB.PCI.AGP.VGA", /* 570 */
373 "\\_SB.PCI0.AGP0.VID0", /* 600e/x, 770x */
374 "\\_SB.PCI0.VID0", /* 770e */
375 "\\_SB.PCI0.VID", /* A21e, G4x, R50e, X30, X40 */
376 "\\_SB.PCI0.AGP.VID", /* all others */
377 ); /* R30, R31 */
378
379
380 /*************************************************************************
381 * ACPI helpers
382 */
383
384 static int acpi_evalf(acpi_handle handle,
385 void *res, char *method, char *fmt, ...)
386 {
387 char *fmt0 = fmt;
388 struct acpi_object_list params;
389 union acpi_object in_objs[TPACPI_MAX_ACPI_ARGS];
390 struct acpi_buffer result, *resultp;
391 union acpi_object out_obj;
392 acpi_status status;
393 va_list ap;
394 char res_type;
395 int success;
396 int quiet;
397
398 if (!*fmt) {
399 printk(TPACPI_ERR "acpi_evalf() called with empty format\n");
400 return 0;
401 }
402
403 if (*fmt == 'q') {
404 quiet = 1;
405 fmt++;
406 } else
407 quiet = 0;
408
409 res_type = *(fmt++);
410
411 params.count = 0;
412 params.pointer = &in_objs[0];
413
414 va_start(ap, fmt);
415 while (*fmt) {
416 char c = *(fmt++);
417 switch (c) {
418 case 'd': /* int */
419 in_objs[params.count].integer.value = va_arg(ap, int);
420 in_objs[params.count++].type = ACPI_TYPE_INTEGER;
421 break;
422 /* add more types as needed */
423 default:
424 printk(TPACPI_ERR "acpi_evalf() called "
425 "with invalid format character '%c'\n", c);
426 return 0;
427 }
428 }
429 va_end(ap);
430
431 if (res_type != 'v') {
432 result.length = sizeof(out_obj);
433 result.pointer = &out_obj;
434 resultp = &result;
435 } else
436 resultp = NULL;
437
438 status = acpi_evaluate_object(handle, method, &params, resultp);
439
440 switch (res_type) {
441 case 'd': /* int */
442 if (res)
443 *(int *)res = out_obj.integer.value;
444 success = status == AE_OK && out_obj.type == ACPI_TYPE_INTEGER;
445 break;
446 case 'v': /* void */
447 success = status == AE_OK;
448 break;
449 /* add more types as needed */
450 default:
451 printk(TPACPI_ERR "acpi_evalf() called "
452 "with invalid format character '%c'\n", res_type);
453 return 0;
454 }
455
456 if (!success && !quiet)
457 printk(TPACPI_ERR "acpi_evalf(%s, %s, ...) failed: %d\n",
458 method, fmt0, status);
459
460 return success;
461 }
462
463 static int acpi_ec_read(int i, u8 *p)
464 {
465 int v;
466
467 if (ecrd_handle) {
468 if (!acpi_evalf(ecrd_handle, &v, NULL, "dd", i))
469 return 0;
470 *p = v;
471 } else {
472 if (ec_read(i, p) < 0)
473 return 0;
474 }
475
476 return 1;
477 }
478
479 static int acpi_ec_write(int i, u8 v)
480 {
481 if (ecwr_handle) {
482 if (!acpi_evalf(ecwr_handle, NULL, NULL, "vdd", i, v))
483 return 0;
484 } else {
485 if (ec_write(i, v) < 0)
486 return 0;
487 }
488
489 return 1;
490 }
491
492 #if defined(CONFIG_THINKPAD_ACPI_DOCK) || defined(CONFIG_THINKPAD_ACPI_BAY)
493 static int _sta(acpi_handle handle)
494 {
495 int status;
496
497 if (!handle || !acpi_evalf(handle, &status, "_STA", "d"))
498 status = 0;
499
500 return status;
501 }
502 #endif
503
504 static int issue_thinkpad_cmos_command(int cmos_cmd)
505 {
506 if (!cmos_handle)
507 return -ENXIO;
508
509 if (!acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd))
510 return -EIO;
511
512 return 0;
513 }
514
515 /*************************************************************************
516 * ACPI device model
517 */
518
519 #define TPACPI_ACPIHANDLE_INIT(object) \
520 drv_acpi_handle_init(#object, &object##_handle, *object##_parent, \
521 object##_paths, ARRAY_SIZE(object##_paths), &object##_path)
522
523 static void drv_acpi_handle_init(char *name,
524 acpi_handle *handle, acpi_handle parent,
525 char **paths, int num_paths, char **path)
526 {
527 int i;
528 acpi_status status;
529
530 vdbg_printk(TPACPI_DBG_INIT, "trying to locate ACPI handle for %s\n",
531 name);
532
533 for (i = 0; i < num_paths; i++) {
534 status = acpi_get_handle(parent, paths[i], handle);
535 if (ACPI_SUCCESS(status)) {
536 *path = paths[i];
537 dbg_printk(TPACPI_DBG_INIT,
538 "Found ACPI handle %s for %s\n",
539 *path, name);
540 return;
541 }
542 }
543
544 vdbg_printk(TPACPI_DBG_INIT, "ACPI handle for %s not found\n",
545 name);
546 *handle = NULL;
547 }
548
549 static void dispatch_acpi_notify(acpi_handle handle, u32 event, void *data)
550 {
551 struct ibm_struct *ibm = data;
552
553 if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
554 return;
555
556 if (!ibm || !ibm->acpi || !ibm->acpi->notify)
557 return;
558
559 ibm->acpi->notify(ibm, event);
560 }
561
562 static int __init setup_acpi_notify(struct ibm_struct *ibm)
563 {
564 acpi_status status;
565 int rc;
566
567 BUG_ON(!ibm->acpi);
568
569 if (!*ibm->acpi->handle)
570 return 0;
571
572 vdbg_printk(TPACPI_DBG_INIT,
573 "setting up ACPI notify for %s\n", ibm->name);
574
575 rc = acpi_bus_get_device(*ibm->acpi->handle, &ibm->acpi->device);
576 if (rc < 0) {
577 printk(TPACPI_ERR "acpi_bus_get_device(%s) failed: %d\n",
578 ibm->name, rc);
579 return -ENODEV;
580 }
581
582 ibm->acpi->device->driver_data = ibm;
583 sprintf(acpi_device_class(ibm->acpi->device), "%s/%s",
584 TPACPI_ACPI_EVENT_PREFIX,
585 ibm->name);
586
587 status = acpi_install_notify_handler(*ibm->acpi->handle,
588 ibm->acpi->type, dispatch_acpi_notify, ibm);
589 if (ACPI_FAILURE(status)) {
590 if (status == AE_ALREADY_EXISTS) {
591 printk(TPACPI_NOTICE
592 "another device driver is already "
593 "handling %s events\n", ibm->name);
594 } else {
595 printk(TPACPI_ERR
596 "acpi_install_notify_handler(%s) failed: %d\n",
597 ibm->name, status);
598 }
599 return -ENODEV;
600 }
601 ibm->flags.acpi_notify_installed = 1;
602 return 0;
603 }
604
605 static int __init tpacpi_device_add(struct acpi_device *device)
606 {
607 return 0;
608 }
609
610 static int __init register_tpacpi_subdriver(struct ibm_struct *ibm)
611 {
612 int rc;
613
614 dbg_printk(TPACPI_DBG_INIT,
615 "registering %s as an ACPI driver\n", ibm->name);
616
617 BUG_ON(!ibm->acpi);
618
619 ibm->acpi->driver = kzalloc(sizeof(struct acpi_driver), GFP_KERNEL);
620 if (!ibm->acpi->driver) {
621 printk(TPACPI_ERR
622 "failed to allocate memory for ibm->acpi->driver\n");
623 return -ENOMEM;
624 }
625
626 sprintf(ibm->acpi->driver->name, "%s_%s", TPACPI_NAME, ibm->name);
627 ibm->acpi->driver->ids = ibm->acpi->hid;
628
629 ibm->acpi->driver->ops.add = &tpacpi_device_add;
630
631 rc = acpi_bus_register_driver(ibm->acpi->driver);
632 if (rc < 0) {
633 printk(TPACPI_ERR "acpi_bus_register_driver(%s) failed: %d\n",
634 ibm->name, rc);
635 kfree(ibm->acpi->driver);
636 ibm->acpi->driver = NULL;
637 } else if (!rc)
638 ibm->flags.acpi_driver_registered = 1;
639
640 return rc;
641 }
642
643
644 /****************************************************************************
645 ****************************************************************************
646 *
647 * Procfs Helpers
648 *
649 ****************************************************************************
650 ****************************************************************************/
651
652 static int dispatch_procfs_read(char *page, char **start, off_t off,
653 int count, int *eof, void *data)
654 {
655 struct ibm_struct *ibm = data;
656 int len;
657
658 if (!ibm || !ibm->read)
659 return -EINVAL;
660
661 len = ibm->read(page);
662 if (len < 0)
663 return len;
664
665 if (len <= off + count)
666 *eof = 1;
667 *start = page + off;
668 len -= off;
669 if (len > count)
670 len = count;
671 if (len < 0)
672 len = 0;
673
674 return len;
675 }
676
677 static int dispatch_procfs_write(struct file *file,
678 const char __user *userbuf,
679 unsigned long count, void *data)
680 {
681 struct ibm_struct *ibm = data;
682 char *kernbuf;
683 int ret;
684
685 if (!ibm || !ibm->write)
686 return -EINVAL;
687
688 kernbuf = kmalloc(count + 2, GFP_KERNEL);
689 if (!kernbuf)
690 return -ENOMEM;
691
692 if (copy_from_user(kernbuf, userbuf, count)) {
693 kfree(kernbuf);
694 return -EFAULT;
695 }
696
697 kernbuf[count] = 0;
698 strcat(kernbuf, ",");
699 ret = ibm->write(kernbuf);
700 if (ret == 0)
701 ret = count;
702
703 kfree(kernbuf);
704
705 return ret;
706 }
707
708 static char *next_cmd(char **cmds)
709 {
710 char *start = *cmds;
711 char *end;
712
713 while ((end = strchr(start, ',')) && end == start)
714 start = end + 1;
715
716 if (!end)
717 return NULL;
718
719 *end = 0;
720 *cmds = end + 1;
721 return start;
722 }
723
724
725 /****************************************************************************
726 ****************************************************************************
727 *
728 * Device model: input, hwmon and platform
729 *
730 ****************************************************************************
731 ****************************************************************************/
732
733 static struct platform_device *tpacpi_pdev;
734 static struct platform_device *tpacpi_sensors_pdev;
735 static struct device *tpacpi_hwmon;
736 static struct input_dev *tpacpi_inputdev;
737 static struct mutex tpacpi_inputdev_send_mutex;
738 static LIST_HEAD(tpacpi_all_drivers);
739
740 static int tpacpi_suspend_handler(struct platform_device *pdev,
741 pm_message_t state)
742 {
743 struct ibm_struct *ibm, *itmp;
744
745 list_for_each_entry_safe(ibm, itmp,
746 &tpacpi_all_drivers,
747 all_drivers) {
748 if (ibm->suspend)
749 (ibm->suspend)(state);
750 }
751
752 return 0;
753 }
754
755 static int tpacpi_resume_handler(struct platform_device *pdev)
756 {
757 struct ibm_struct *ibm, *itmp;
758
759 list_for_each_entry_safe(ibm, itmp,
760 &tpacpi_all_drivers,
761 all_drivers) {
762 if (ibm->resume)
763 (ibm->resume)();
764 }
765
766 return 0;
767 }
768
769 static void tpacpi_shutdown_handler(struct platform_device *pdev)
770 {
771 struct ibm_struct *ibm, *itmp;
772
773 list_for_each_entry_safe(ibm, itmp,
774 &tpacpi_all_drivers,
775 all_drivers) {
776 if (ibm->shutdown)
777 (ibm->shutdown)();
778 }
779 }
780
781 static struct platform_driver tpacpi_pdriver = {
782 .driver = {
783 .name = TPACPI_DRVR_NAME,
784 .owner = THIS_MODULE,
785 },
786 .suspend = tpacpi_suspend_handler,
787 .resume = tpacpi_resume_handler,
788 .shutdown = tpacpi_shutdown_handler,
789 };
790
791 static struct platform_driver tpacpi_hwmon_pdriver = {
792 .driver = {
793 .name = TPACPI_HWMON_DRVR_NAME,
794 .owner = THIS_MODULE,
795 },
796 };
797
798 /*************************************************************************
799 * sysfs support helpers
800 */
801
802 struct attribute_set {
803 unsigned int members, max_members;
804 struct attribute_group group;
805 };
806
807 struct attribute_set_obj {
808 struct attribute_set s;
809 struct attribute *a;
810 } __attribute__((packed));
811
812 static struct attribute_set *create_attr_set(unsigned int max_members,
813 const char *name)
814 {
815 struct attribute_set_obj *sobj;
816
817 if (max_members == 0)
818 return NULL;
819
820 /* Allocates space for implicit NULL at the end too */
821 sobj = kzalloc(sizeof(struct attribute_set_obj) +
822 max_members * sizeof(struct attribute *),
823 GFP_KERNEL);
824 if (!sobj)
825 return NULL;
826 sobj->s.max_members = max_members;
827 sobj->s.group.attrs = &sobj->a;
828 sobj->s.group.name = name;
829
830 return &sobj->s;
831 }
832
833 #define destroy_attr_set(_set) \
834 kfree(_set);
835
836 /* not multi-threaded safe, use it in a single thread per set */
837 static int add_to_attr_set(struct attribute_set *s, struct attribute *attr)
838 {
839 if (!s || !attr)
840 return -EINVAL;
841
842 if (s->members >= s->max_members)
843 return -ENOMEM;
844
845 s->group.attrs[s->members] = attr;
846 s->members++;
847
848 return 0;
849 }
850
851 static int add_many_to_attr_set(struct attribute_set *s,
852 struct attribute **attr,
853 unsigned int count)
854 {
855 int i, res;
856
857 for (i = 0; i < count; i++) {
858 res = add_to_attr_set(s, attr[i]);
859 if (res)
860 return res;
861 }
862
863 return 0;
864 }
865
866 static void delete_attr_set(struct attribute_set *s, struct kobject *kobj)
867 {
868 sysfs_remove_group(kobj, &s->group);
869 destroy_attr_set(s);
870 }
871
872 #define register_attr_set_with_sysfs(_attr_set, _kobj) \
873 sysfs_create_group(_kobj, &_attr_set->group)
874
875 static int parse_strtoul(const char *buf,
876 unsigned long max, unsigned long *value)
877 {
878 char *endp;
879
880 while (*buf && isspace(*buf))
881 buf++;
882 *value = simple_strtoul(buf, &endp, 0);
883 while (*endp && isspace(*endp))
884 endp++;
885 if (*endp || *value > max)
886 return -EINVAL;
887
888 return 0;
889 }
890
891 static void tpacpi_disable_brightness_delay(void)
892 {
893 if (acpi_evalf(hkey_handle, NULL, "PWMS", "qvd", 0))
894 printk(TPACPI_NOTICE
895 "ACPI backlight control delay disabled\n");
896 }
897
898 static int __init tpacpi_query_bcl_levels(acpi_handle handle)
899 {
900 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
901 union acpi_object *obj;
902 int rc;
903
904 if (ACPI_SUCCESS(acpi_evaluate_object(handle, NULL, NULL, &buffer))) {
905 obj = (union acpi_object *)buffer.pointer;
906 if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) {
907 printk(TPACPI_ERR "Unknown _BCL data, "
908 "please report this to %s\n", TPACPI_MAIL);
909 rc = 0;
910 } else {
911 rc = obj->package.count;
912 }
913 } else {
914 return 0;
915 }
916
917 kfree(buffer.pointer);
918 return rc;
919 }
920
921 static acpi_status __init tpacpi_acpi_walk_find_bcl(acpi_handle handle,
922 u32 lvl, void *context, void **rv)
923 {
924 char name[ACPI_PATH_SEGMENT_LENGTH];
925 struct acpi_buffer buffer = { sizeof(name), &name };
926
927 if (ACPI_SUCCESS(acpi_get_name(handle, ACPI_SINGLE_NAME, &buffer)) &&
928 !strncmp("_BCL", name, sizeof(name) - 1)) {
929 BUG_ON(!rv || !*rv);
930 **(int **)rv = tpacpi_query_bcl_levels(handle);
931 return AE_CTRL_TERMINATE;
932 } else {
933 return AE_OK;
934 }
935 }
936
937 /*
938 * Returns 0 (no ACPI _BCL or _BCL invalid), or size of brightness map
939 */
940 static int __init tpacpi_check_std_acpi_brightness_support(void)
941 {
942 int status;
943 int bcl_levels = 0;
944 void *bcl_ptr = &bcl_levels;
945
946 if (!vid_handle) {
947 TPACPI_ACPIHANDLE_INIT(vid);
948 }
949 if (!vid_handle)
950 return 0;
951
952 /*
953 * Search for a _BCL method, and execute it. This is safe on all
954 * ThinkPads, and as a side-effect, _BCL will place a Lenovo Vista
955 * BIOS in ACPI backlight control mode. We do NOT have to care
956 * about calling the _BCL method in an enabled video device, any
957 * will do for our purposes.
958 */
959
960 status = acpi_walk_namespace(ACPI_TYPE_METHOD, vid_handle, 3,
961 tpacpi_acpi_walk_find_bcl, NULL,
962 &bcl_ptr);
963
964 if (ACPI_SUCCESS(status) && bcl_levels > 2) {
965 tp_features.bright_acpimode = 1;
966 return (bcl_levels - 2);
967 }
968
969 return 0;
970 }
971
972 static int __init tpacpi_new_rfkill(const unsigned int id,
973 struct rfkill **rfk,
974 const enum rfkill_type rfktype,
975 const char *name,
976 const bool set_default,
977 int (*toggle_radio)(void *, enum rfkill_state),
978 int (*get_state)(void *, enum rfkill_state *))
979 {
980 int res;
981 enum rfkill_state initial_state = RFKILL_STATE_SOFT_BLOCKED;
982
983 res = get_state(NULL, &initial_state);
984 if (res < 0) {
985 printk(TPACPI_ERR
986 "failed to read initial state for %s, error %d; "
987 "will turn radio off\n", name, res);
988 } else if (set_default) {
989 /* try to set the initial state as the default for the rfkill
990 * type, since we ask the firmware to preserve it across S5 in
991 * NVRAM */
992 rfkill_set_default(rfktype,
993 (initial_state == RFKILL_STATE_UNBLOCKED) ?
994 RFKILL_STATE_UNBLOCKED :
995 RFKILL_STATE_SOFT_BLOCKED);
996 }
997
998 *rfk = rfkill_allocate(&tpacpi_pdev->dev, rfktype);
999 if (!*rfk) {
1000 printk(TPACPI_ERR
1001 "failed to allocate memory for rfkill class\n");
1002 return -ENOMEM;
1003 }
1004
1005 (*rfk)->name = name;
1006 (*rfk)->get_state = get_state;
1007 (*rfk)->toggle_radio = toggle_radio;
1008 (*rfk)->state = initial_state;
1009
1010 res = rfkill_register(*rfk);
1011 if (res < 0) {
1012 printk(TPACPI_ERR
1013 "failed to register %s rfkill switch: %d\n",
1014 name, res);
1015 rfkill_free(*rfk);
1016 *rfk = NULL;
1017 return res;
1018 }
1019
1020 return 0;
1021 }
1022
1023 /*************************************************************************
1024 * thinkpad-acpi driver attributes
1025 */
1026
1027 /* interface_version --------------------------------------------------- */
1028 static ssize_t tpacpi_driver_interface_version_show(
1029 struct device_driver *drv,
1030 char *buf)
1031 {
1032 return snprintf(buf, PAGE_SIZE, "0x%08x\n", TPACPI_SYSFS_VERSION);
1033 }
1034
1035 static DRIVER_ATTR(interface_version, S_IRUGO,
1036 tpacpi_driver_interface_version_show, NULL);
1037
1038 /* debug_level --------------------------------------------------------- */
1039 static ssize_t tpacpi_driver_debug_show(struct device_driver *drv,
1040 char *buf)
1041 {
1042 return snprintf(buf, PAGE_SIZE, "0x%04x\n", dbg_level);
1043 }
1044
1045 static ssize_t tpacpi_driver_debug_store(struct device_driver *drv,
1046 const char *buf, size_t count)
1047 {
1048 unsigned long t;
1049
1050 if (parse_strtoul(buf, 0xffff, &t))
1051 return -EINVAL;
1052
1053 dbg_level = t;
1054
1055 return count;
1056 }
1057
1058 static DRIVER_ATTR(debug_level, S_IWUSR | S_IRUGO,
1059 tpacpi_driver_debug_show, tpacpi_driver_debug_store);
1060
1061 /* version ------------------------------------------------------------- */
1062 static ssize_t tpacpi_driver_version_show(struct device_driver *drv,
1063 char *buf)
1064 {
1065 return snprintf(buf, PAGE_SIZE, "%s v%s\n",
1066 TPACPI_DESC, TPACPI_VERSION);
1067 }
1068
1069 static DRIVER_ATTR(version, S_IRUGO,
1070 tpacpi_driver_version_show, NULL);
1071
1072 /* --------------------------------------------------------------------- */
1073
1074 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
1075
1076 static void tpacpi_send_radiosw_update(void);
1077
1078 /* wlsw_emulstate ------------------------------------------------------ */
1079 static ssize_t tpacpi_driver_wlsw_emulstate_show(struct device_driver *drv,
1080 char *buf)
1081 {
1082 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_wlsw_emulstate);
1083 }
1084
1085 static ssize_t tpacpi_driver_wlsw_emulstate_store(struct device_driver *drv,
1086 const char *buf, size_t count)
1087 {
1088 unsigned long t;
1089
1090 if (parse_strtoul(buf, 1, &t))
1091 return -EINVAL;
1092
1093 if (tpacpi_wlsw_emulstate != t) {
1094 tpacpi_wlsw_emulstate = !!t;
1095 tpacpi_send_radiosw_update();
1096 } else
1097 tpacpi_wlsw_emulstate = !!t;
1098
1099 return count;
1100 }
1101
1102 static DRIVER_ATTR(wlsw_emulstate, S_IWUSR | S_IRUGO,
1103 tpacpi_driver_wlsw_emulstate_show,
1104 tpacpi_driver_wlsw_emulstate_store);
1105
1106 /* bluetooth_emulstate ------------------------------------------------- */
1107 static ssize_t tpacpi_driver_bluetooth_emulstate_show(
1108 struct device_driver *drv,
1109 char *buf)
1110 {
1111 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_bluetooth_emulstate);
1112 }
1113
1114 static ssize_t tpacpi_driver_bluetooth_emulstate_store(
1115 struct device_driver *drv,
1116 const char *buf, size_t count)
1117 {
1118 unsigned long t;
1119
1120 if (parse_strtoul(buf, 1, &t))
1121 return -EINVAL;
1122
1123 tpacpi_bluetooth_emulstate = !!t;
1124
1125 return count;
1126 }
1127
1128 static DRIVER_ATTR(bluetooth_emulstate, S_IWUSR | S_IRUGO,
1129 tpacpi_driver_bluetooth_emulstate_show,
1130 tpacpi_driver_bluetooth_emulstate_store);
1131
1132 /* wwan_emulstate ------------------------------------------------- */
1133 static ssize_t tpacpi_driver_wwan_emulstate_show(
1134 struct device_driver *drv,
1135 char *buf)
1136 {
1137 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_wwan_emulstate);
1138 }
1139
1140 static ssize_t tpacpi_driver_wwan_emulstate_store(
1141 struct device_driver *drv,
1142 const char *buf, size_t count)
1143 {
1144 unsigned long t;
1145
1146 if (parse_strtoul(buf, 1, &t))
1147 return -EINVAL;
1148
1149 tpacpi_wwan_emulstate = !!t;
1150
1151 return count;
1152 }
1153
1154 static DRIVER_ATTR(wwan_emulstate, S_IWUSR | S_IRUGO,
1155 tpacpi_driver_wwan_emulstate_show,
1156 tpacpi_driver_wwan_emulstate_store);
1157
1158 /* uwb_emulstate ------------------------------------------------- */
1159 static ssize_t tpacpi_driver_uwb_emulstate_show(
1160 struct device_driver *drv,
1161 char *buf)
1162 {
1163 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_uwb_emulstate);
1164 }
1165
1166 static ssize_t tpacpi_driver_uwb_emulstate_store(
1167 struct device_driver *drv,
1168 const char *buf, size_t count)
1169 {
1170 unsigned long t;
1171
1172 if (parse_strtoul(buf, 1, &t))
1173 return -EINVAL;
1174
1175 tpacpi_uwb_emulstate = !!t;
1176
1177 return count;
1178 }
1179
1180 static DRIVER_ATTR(uwb_emulstate, S_IWUSR | S_IRUGO,
1181 tpacpi_driver_uwb_emulstate_show,
1182 tpacpi_driver_uwb_emulstate_store);
1183 #endif
1184
1185 /* --------------------------------------------------------------------- */
1186
1187 static struct driver_attribute *tpacpi_driver_attributes[] = {
1188 &driver_attr_debug_level, &driver_attr_version,
1189 &driver_attr_interface_version,
1190 };
1191
1192 static int __init tpacpi_create_driver_attributes(struct device_driver *drv)
1193 {
1194 int i, res;
1195
1196 i = 0;
1197 res = 0;
1198 while (!res && i < ARRAY_SIZE(tpacpi_driver_attributes)) {
1199 res = driver_create_file(drv, tpacpi_driver_attributes[i]);
1200 i++;
1201 }
1202
1203 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
1204 if (!res && dbg_wlswemul)
1205 res = driver_create_file(drv, &driver_attr_wlsw_emulstate);
1206 if (!res && dbg_bluetoothemul)
1207 res = driver_create_file(drv, &driver_attr_bluetooth_emulstate);
1208 if (!res && dbg_wwanemul)
1209 res = driver_create_file(drv, &driver_attr_wwan_emulstate);
1210 if (!res && dbg_uwbemul)
1211 res = driver_create_file(drv, &driver_attr_uwb_emulstate);
1212 #endif
1213
1214 return res;
1215 }
1216
1217 static void tpacpi_remove_driver_attributes(struct device_driver *drv)
1218 {
1219 int i;
1220
1221 for (i = 0; i < ARRAY_SIZE(tpacpi_driver_attributes); i++)
1222 driver_remove_file(drv, tpacpi_driver_attributes[i]);
1223
1224 #ifdef THINKPAD_ACPI_DEBUGFACILITIES
1225 driver_remove_file(drv, &driver_attr_wlsw_emulstate);
1226 driver_remove_file(drv, &driver_attr_bluetooth_emulstate);
1227 driver_remove_file(drv, &driver_attr_wwan_emulstate);
1228 driver_remove_file(drv, &driver_attr_uwb_emulstate);
1229 #endif
1230 }
1231
1232 /****************************************************************************
1233 ****************************************************************************
1234 *
1235 * Subdrivers
1236 *
1237 ****************************************************************************
1238 ****************************************************************************/
1239
1240 /*************************************************************************
1241 * thinkpad-acpi init subdriver
1242 */
1243
1244 static int __init thinkpad_acpi_driver_init(struct ibm_init_struct *iibm)
1245 {
1246 printk(TPACPI_INFO "%s v%s\n", TPACPI_DESC, TPACPI_VERSION);
1247 printk(TPACPI_INFO "%s\n", TPACPI_URL);
1248
1249 printk(TPACPI_INFO "ThinkPad BIOS %s, EC %s\n",
1250 (thinkpad_id.bios_version_str) ?
1251 thinkpad_id.bios_version_str : "unknown",
1252 (thinkpad_id.ec_version_str) ?
1253 thinkpad_id.ec_version_str : "unknown");
1254
1255 if (thinkpad_id.vendor && thinkpad_id.model_str)
1256 printk(TPACPI_INFO "%s %s, model %s\n",
1257 (thinkpad_id.vendor == PCI_VENDOR_ID_IBM) ?
1258 "IBM" : ((thinkpad_id.vendor ==
1259 PCI_VENDOR_ID_LENOVO) ?
1260 "Lenovo" : "Unknown vendor"),
1261 thinkpad_id.model_str,
1262 (thinkpad_id.nummodel_str) ?
1263 thinkpad_id.nummodel_str : "unknown");
1264
1265 return 0;
1266 }
1267
1268 static int thinkpad_acpi_driver_read(char *p)
1269 {
1270 int len = 0;
1271
1272 len += sprintf(p + len, "driver:\t\t%s\n", TPACPI_DESC);
1273 len += sprintf(p + len, "version:\t%s\n", TPACPI_VERSION);
1274
1275 return len;
1276 }
1277
1278 static struct ibm_struct thinkpad_acpi_driver_data = {
1279 .name = "driver",
1280 .read = thinkpad_acpi_driver_read,
1281 };
1282
1283 /*************************************************************************
1284 * Hotkey subdriver
1285 */
1286
1287 enum { /* hot key scan codes (derived from ACPI DSDT) */
1288 TP_ACPI_HOTKEYSCAN_FNF1 = 0,
1289 TP_ACPI_HOTKEYSCAN_FNF2,
1290 TP_ACPI_HOTKEYSCAN_FNF3,
1291 TP_ACPI_HOTKEYSCAN_FNF4,
1292 TP_ACPI_HOTKEYSCAN_FNF5,
1293 TP_ACPI_HOTKEYSCAN_FNF6,
1294 TP_ACPI_HOTKEYSCAN_FNF7,
1295 TP_ACPI_HOTKEYSCAN_FNF8,
1296 TP_ACPI_HOTKEYSCAN_FNF9,
1297 TP_ACPI_HOTKEYSCAN_FNF10,
1298 TP_ACPI_HOTKEYSCAN_FNF11,
1299 TP_ACPI_HOTKEYSCAN_FNF12,
1300 TP_ACPI_HOTKEYSCAN_FNBACKSPACE,
1301 TP_ACPI_HOTKEYSCAN_FNINSERT,
1302 TP_ACPI_HOTKEYSCAN_FNDELETE,
1303 TP_ACPI_HOTKEYSCAN_FNHOME,
1304 TP_ACPI_HOTKEYSCAN_FNEND,
1305 TP_ACPI_HOTKEYSCAN_FNPAGEUP,
1306 TP_ACPI_HOTKEYSCAN_FNPAGEDOWN,
1307 TP_ACPI_HOTKEYSCAN_FNSPACE,
1308 TP_ACPI_HOTKEYSCAN_VOLUMEUP,
1309 TP_ACPI_HOTKEYSCAN_VOLUMEDOWN,
1310 TP_ACPI_HOTKEYSCAN_MUTE,
1311 TP_ACPI_HOTKEYSCAN_THINKPAD,
1312 };
1313
1314 enum { /* Keys available through NVRAM polling */
1315 TPACPI_HKEY_NVRAM_KNOWN_MASK = 0x00fb88c0U,
1316 TPACPI_HKEY_NVRAM_GOOD_MASK = 0x00fb8000U,
1317 };
1318
1319 enum { /* Positions of some of the keys in hotkey masks */
1320 TP_ACPI_HKEY_DISPSWTCH_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF7,
1321 TP_ACPI_HKEY_DISPXPAND_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF8,
1322 TP_ACPI_HKEY_HIBERNATE_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF12,
1323 TP_ACPI_HKEY_BRGHTUP_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNHOME,
1324 TP_ACPI_HKEY_BRGHTDWN_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNEND,
1325 TP_ACPI_HKEY_THNKLGHT_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNPAGEUP,
1326 TP_ACPI_HKEY_ZOOM_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNSPACE,
1327 TP_ACPI_HKEY_VOLUP_MASK = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEUP,
1328 TP_ACPI_HKEY_VOLDWN_MASK = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEDOWN,
1329 TP_ACPI_HKEY_MUTE_MASK = 1 << TP_ACPI_HOTKEYSCAN_MUTE,
1330 TP_ACPI_HKEY_THINKPAD_MASK = 1 << TP_ACPI_HOTKEYSCAN_THINKPAD,
1331 };
1332
1333 enum { /* NVRAM to ACPI HKEY group map */
1334 TP_NVRAM_HKEY_GROUP_HK2 = TP_ACPI_HKEY_THINKPAD_MASK |
1335 TP_ACPI_HKEY_ZOOM_MASK |
1336 TP_ACPI_HKEY_DISPSWTCH_MASK |
1337 TP_ACPI_HKEY_HIBERNATE_MASK,
1338 TP_NVRAM_HKEY_GROUP_BRIGHTNESS = TP_ACPI_HKEY_BRGHTUP_MASK |
1339 TP_ACPI_HKEY_BRGHTDWN_MASK,
1340 TP_NVRAM_HKEY_GROUP_VOLUME = TP_ACPI_HKEY_VOLUP_MASK |
1341 TP_ACPI_HKEY_VOLDWN_MASK |
1342 TP_ACPI_HKEY_MUTE_MASK,
1343 };
1344
1345 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1346 struct tp_nvram_state {
1347 u16 thinkpad_toggle:1;
1348 u16 zoom_toggle:1;
1349 u16 display_toggle:1;
1350 u16 thinklight_toggle:1;
1351 u16 hibernate_toggle:1;
1352 u16 displayexp_toggle:1;
1353 u16 display_state:1;
1354 u16 brightness_toggle:1;
1355 u16 volume_toggle:1;
1356 u16 mute:1;
1357
1358 u8 brightness_level;
1359 u8 volume_level;
1360 };
1361
1362 static struct task_struct *tpacpi_hotkey_task;
1363 static u32 hotkey_source_mask; /* bit mask 0=ACPI,1=NVRAM */
1364 static int hotkey_poll_freq = 10; /* Hz */
1365 static struct mutex hotkey_thread_mutex;
1366 static struct mutex hotkey_thread_data_mutex;
1367 static unsigned int hotkey_config_change;
1368
1369 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1370
1371 #define hotkey_source_mask 0U
1372
1373 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1374
1375 static struct mutex hotkey_mutex;
1376
1377 static enum { /* Reasons for waking up */
1378 TP_ACPI_WAKEUP_NONE = 0, /* None or unknown */
1379 TP_ACPI_WAKEUP_BAYEJ, /* Bay ejection request */
1380 TP_ACPI_WAKEUP_UNDOCK, /* Undock request */
1381 } hotkey_wakeup_reason;
1382
1383 static int hotkey_autosleep_ack;
1384
1385 static int hotkey_orig_status;
1386 static u32 hotkey_orig_mask;
1387 static u32 hotkey_all_mask;
1388 static u32 hotkey_reserved_mask;
1389 static u32 hotkey_mask;
1390
1391 static unsigned int hotkey_report_mode;
1392
1393 static u16 *hotkey_keycode_map;
1394
1395 static struct attribute_set *hotkey_dev_attributes;
1396
1397 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1398 #define HOTKEY_CONFIG_CRITICAL_START \
1399 do { \
1400 mutex_lock(&hotkey_thread_data_mutex); \
1401 hotkey_config_change++; \
1402 } while (0);
1403 #define HOTKEY_CONFIG_CRITICAL_END \
1404 mutex_unlock(&hotkey_thread_data_mutex);
1405 #else
1406 #define HOTKEY_CONFIG_CRITICAL_START
1407 #define HOTKEY_CONFIG_CRITICAL_END
1408 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1409
1410 /* HKEY.MHKG() return bits */
1411 #define TP_HOTKEY_TABLET_MASK (1 << 3)
1412
1413 static int hotkey_get_wlsw(int *status)
1414 {
1415 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
1416 if (dbg_wlswemul) {
1417 *status = !!tpacpi_wlsw_emulstate;
1418 return 0;
1419 }
1420 #endif
1421 if (!acpi_evalf(hkey_handle, status, "WLSW", "d"))
1422 return -EIO;
1423 return 0;
1424 }
1425
1426 static int hotkey_get_tablet_mode(int *status)
1427 {
1428 int s;
1429
1430 if (!acpi_evalf(hkey_handle, &s, "MHKG", "d"))
1431 return -EIO;
1432
1433 *status = ((s & TP_HOTKEY_TABLET_MASK) != 0);
1434 return 0;
1435 }
1436
1437 /*
1438 * Call with hotkey_mutex held
1439 */
1440 static int hotkey_mask_get(void)
1441 {
1442 u32 m = 0;
1443
1444 if (tp_features.hotkey_mask) {
1445 if (!acpi_evalf(hkey_handle, &m, "DHKN", "d"))
1446 return -EIO;
1447 }
1448 hotkey_mask = m | (hotkey_source_mask & hotkey_mask);
1449
1450 return 0;
1451 }
1452
1453 /*
1454 * Call with hotkey_mutex held
1455 */
1456 static int hotkey_mask_set(u32 mask)
1457 {
1458 int i;
1459 int rc = 0;
1460
1461 if (tp_features.hotkey_mask) {
1462 if (!tp_warned.hotkey_mask_ff &&
1463 (mask == 0xffff || mask == 0xffffff ||
1464 mask == 0xffffffff)) {
1465 tp_warned.hotkey_mask_ff = 1;
1466 printk(TPACPI_NOTICE
1467 "setting the hotkey mask to 0x%08x is likely "
1468 "not the best way to go about it\n", mask);
1469 printk(TPACPI_NOTICE
1470 "please consider using the driver defaults, "
1471 "and refer to up-to-date thinkpad-acpi "
1472 "documentation\n");
1473 }
1474
1475 HOTKEY_CONFIG_CRITICAL_START
1476 for (i = 0; i < 32; i++) {
1477 u32 m = 1 << i;
1478 /* enable in firmware mask only keys not in NVRAM
1479 * mode, but enable the key in the cached hotkey_mask
1480 * regardless of mode, or the key will end up
1481 * disabled by hotkey_mask_get() */
1482 if (!acpi_evalf(hkey_handle,
1483 NULL, "MHKM", "vdd", i + 1,
1484 !!((mask & ~hotkey_source_mask) & m))) {
1485 rc = -EIO;
1486 break;
1487 } else {
1488 hotkey_mask = (hotkey_mask & ~m) | (mask & m);
1489 }
1490 }
1491 HOTKEY_CONFIG_CRITICAL_END
1492
1493 /* hotkey_mask_get must be called unconditionally below */
1494 if (!hotkey_mask_get() && !rc &&
1495 (hotkey_mask & ~hotkey_source_mask) !=
1496 (mask & ~hotkey_source_mask)) {
1497 printk(TPACPI_NOTICE
1498 "requested hot key mask 0x%08x, but "
1499 "firmware forced it to 0x%08x\n",
1500 mask, hotkey_mask);
1501 }
1502 } else {
1503 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1504 HOTKEY_CONFIG_CRITICAL_START
1505 hotkey_mask = mask & hotkey_source_mask;
1506 HOTKEY_CONFIG_CRITICAL_END
1507 hotkey_mask_get();
1508 if (hotkey_mask != mask) {
1509 printk(TPACPI_NOTICE
1510 "requested hot key mask 0x%08x, "
1511 "forced to 0x%08x (NVRAM poll mask is "
1512 "0x%08x): no firmware mask support\n",
1513 mask, hotkey_mask, hotkey_source_mask);
1514 }
1515 #else
1516 hotkey_mask_get();
1517 rc = -ENXIO;
1518 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1519 }
1520
1521 return rc;
1522 }
1523
1524 static int hotkey_status_get(int *status)
1525 {
1526 if (!acpi_evalf(hkey_handle, status, "DHKC", "d"))
1527 return -EIO;
1528
1529 return 0;
1530 }
1531
1532 static int hotkey_status_set(int status)
1533 {
1534 if (!acpi_evalf(hkey_handle, NULL, "MHKC", "vd", status))
1535 return -EIO;
1536
1537 return 0;
1538 }
1539
1540 static void tpacpi_input_send_tabletsw(void)
1541 {
1542 int state;
1543
1544 if (tp_features.hotkey_tablet &&
1545 !hotkey_get_tablet_mode(&state)) {
1546 mutex_lock(&tpacpi_inputdev_send_mutex);
1547
1548 input_report_switch(tpacpi_inputdev,
1549 SW_TABLET_MODE, !!state);
1550 input_sync(tpacpi_inputdev);
1551
1552 mutex_unlock(&tpacpi_inputdev_send_mutex);
1553 }
1554 }
1555
1556 static void tpacpi_input_send_key(unsigned int scancode)
1557 {
1558 unsigned int keycode;
1559
1560 keycode = hotkey_keycode_map[scancode];
1561
1562 if (keycode != KEY_RESERVED) {
1563 mutex_lock(&tpacpi_inputdev_send_mutex);
1564
1565 input_report_key(tpacpi_inputdev, keycode, 1);
1566 if (keycode == KEY_UNKNOWN)
1567 input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN,
1568 scancode);
1569 input_sync(tpacpi_inputdev);
1570
1571 input_report_key(tpacpi_inputdev, keycode, 0);
1572 if (keycode == KEY_UNKNOWN)
1573 input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN,
1574 scancode);
1575 input_sync(tpacpi_inputdev);
1576
1577 mutex_unlock(&tpacpi_inputdev_send_mutex);
1578 }
1579 }
1580
1581 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1582 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver;
1583
1584 static void tpacpi_hotkey_send_key(unsigned int scancode)
1585 {
1586 tpacpi_input_send_key(scancode);
1587 if (hotkey_report_mode < 2) {
1588 acpi_bus_generate_proc_event(ibm_hotkey_acpidriver.device,
1589 0x80, 0x1001 + scancode);
1590 }
1591 }
1592
1593 static void hotkey_read_nvram(struct tp_nvram_state *n, u32 m)
1594 {
1595 u8 d;
1596
1597 if (m & TP_NVRAM_HKEY_GROUP_HK2) {
1598 d = nvram_read_byte(TP_NVRAM_ADDR_HK2);
1599 n->thinkpad_toggle = !!(d & TP_NVRAM_MASK_HKT_THINKPAD);
1600 n->zoom_toggle = !!(d & TP_NVRAM_MASK_HKT_ZOOM);
1601 n->display_toggle = !!(d & TP_NVRAM_MASK_HKT_DISPLAY);
1602 n->hibernate_toggle = !!(d & TP_NVRAM_MASK_HKT_HIBERNATE);
1603 }
1604 if (m & TP_ACPI_HKEY_THNKLGHT_MASK) {
1605 d = nvram_read_byte(TP_NVRAM_ADDR_THINKLIGHT);
1606 n->thinklight_toggle = !!(d & TP_NVRAM_MASK_THINKLIGHT);
1607 }
1608 if (m & TP_ACPI_HKEY_DISPXPAND_MASK) {
1609 d = nvram_read_byte(TP_NVRAM_ADDR_VIDEO);
1610 n->displayexp_toggle =
1611 !!(d & TP_NVRAM_MASK_HKT_DISPEXPND);
1612 }
1613 if (m & TP_NVRAM_HKEY_GROUP_BRIGHTNESS) {
1614 d = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS);
1615 n->brightness_level = (d & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
1616 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
1617 n->brightness_toggle =
1618 !!(d & TP_NVRAM_MASK_HKT_BRIGHTNESS);
1619 }
1620 if (m & TP_NVRAM_HKEY_GROUP_VOLUME) {
1621 d = nvram_read_byte(TP_NVRAM_ADDR_MIXER);
1622 n->volume_level = (d & TP_NVRAM_MASK_LEVEL_VOLUME)
1623 >> TP_NVRAM_POS_LEVEL_VOLUME;
1624 n->mute = !!(d & TP_NVRAM_MASK_MUTE);
1625 n->volume_toggle = !!(d & TP_NVRAM_MASK_HKT_VOLUME);
1626 }
1627 }
1628
1629 #define TPACPI_COMPARE_KEY(__scancode, __member) \
1630 do { \
1631 if ((mask & (1 << __scancode)) && \
1632 oldn->__member != newn->__member) \
1633 tpacpi_hotkey_send_key(__scancode); \
1634 } while (0)
1635
1636 #define TPACPI_MAY_SEND_KEY(__scancode) \
1637 do { if (mask & (1 << __scancode)) \
1638 tpacpi_hotkey_send_key(__scancode); } while (0)
1639
1640 static void hotkey_compare_and_issue_event(struct tp_nvram_state *oldn,
1641 struct tp_nvram_state *newn,
1642 u32 mask)
1643 {
1644 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_THINKPAD, thinkpad_toggle);
1645 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNSPACE, zoom_toggle);
1646 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF7, display_toggle);
1647 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF12, hibernate_toggle);
1648
1649 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNPAGEUP, thinklight_toggle);
1650
1651 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF8, displayexp_toggle);
1652
1653 /* handle volume */
1654 if (oldn->volume_toggle != newn->volume_toggle) {
1655 if (oldn->mute != newn->mute) {
1656 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE);
1657 }
1658 if (oldn->volume_level > newn->volume_level) {
1659 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
1660 } else if (oldn->volume_level < newn->volume_level) {
1661 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
1662 } else if (oldn->mute == newn->mute) {
1663 /* repeated key presses that didn't change state */
1664 if (newn->mute) {
1665 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE);
1666 } else if (newn->volume_level != 0) {
1667 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
1668 } else {
1669 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
1670 }
1671 }
1672 }
1673
1674 /* handle brightness */
1675 if (oldn->brightness_toggle != newn->brightness_toggle) {
1676 if (oldn->brightness_level < newn->brightness_level) {
1677 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
1678 } else if (oldn->brightness_level > newn->brightness_level) {
1679 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
1680 } else {
1681 /* repeated key presses that didn't change state */
1682 if (newn->brightness_level != 0) {
1683 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
1684 } else {
1685 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
1686 }
1687 }
1688 }
1689 }
1690
1691 #undef TPACPI_COMPARE_KEY
1692 #undef TPACPI_MAY_SEND_KEY
1693
1694 static int hotkey_kthread(void *data)
1695 {
1696 struct tp_nvram_state s[2];
1697 u32 mask;
1698 unsigned int si, so;
1699 unsigned long t;
1700 unsigned int change_detector, must_reset;
1701
1702 mutex_lock(&hotkey_thread_mutex);
1703
1704 if (tpacpi_lifecycle == TPACPI_LIFE_EXITING)
1705 goto exit;
1706
1707 set_freezable();
1708
1709 so = 0;
1710 si = 1;
1711 t = 0;
1712
1713 /* Initial state for compares */
1714 mutex_lock(&hotkey_thread_data_mutex);
1715 change_detector = hotkey_config_change;
1716 mask = hotkey_source_mask & hotkey_mask;
1717 mutex_unlock(&hotkey_thread_data_mutex);
1718 hotkey_read_nvram(&s[so], mask);
1719
1720 while (!kthread_should_stop() && hotkey_poll_freq) {
1721 if (t == 0)
1722 t = 1000/hotkey_poll_freq;
1723 t = msleep_interruptible(t);
1724 if (unlikely(kthread_should_stop()))
1725 break;
1726 must_reset = try_to_freeze();
1727 if (t > 0 && !must_reset)
1728 continue;
1729
1730 mutex_lock(&hotkey_thread_data_mutex);
1731 if (must_reset || hotkey_config_change != change_detector) {
1732 /* forget old state on thaw or config change */
1733 si = so;
1734 t = 0;
1735 change_detector = hotkey_config_change;
1736 }
1737 mask = hotkey_source_mask & hotkey_mask;
1738 mutex_unlock(&hotkey_thread_data_mutex);
1739
1740 if (likely(mask)) {
1741 hotkey_read_nvram(&s[si], mask);
1742 if (likely(si != so)) {
1743 hotkey_compare_and_issue_event(&s[so], &s[si],
1744 mask);
1745 }
1746 }
1747
1748 so = si;
1749 si ^= 1;
1750 }
1751
1752 exit:
1753 mutex_unlock(&hotkey_thread_mutex);
1754 return 0;
1755 }
1756
1757 static void hotkey_poll_stop_sync(void)
1758 {
1759 if (tpacpi_hotkey_task) {
1760 if (frozen(tpacpi_hotkey_task) ||
1761 freezing(tpacpi_hotkey_task))
1762 thaw_process(tpacpi_hotkey_task);
1763
1764 kthread_stop(tpacpi_hotkey_task);
1765 tpacpi_hotkey_task = NULL;
1766 mutex_lock(&hotkey_thread_mutex);
1767 /* at this point, the thread did exit */
1768 mutex_unlock(&hotkey_thread_mutex);
1769 }
1770 }
1771
1772 /* call with hotkey_mutex held */
1773 static void hotkey_poll_setup(int may_warn)
1774 {
1775 if ((hotkey_source_mask & hotkey_mask) != 0 &&
1776 hotkey_poll_freq > 0 &&
1777 (tpacpi_inputdev->users > 0 || hotkey_report_mode < 2)) {
1778 if (!tpacpi_hotkey_task) {
1779 tpacpi_hotkey_task = kthread_run(hotkey_kthread,
1780 NULL, TPACPI_NVRAM_KTHREAD_NAME);
1781 if (IS_ERR(tpacpi_hotkey_task)) {
1782 tpacpi_hotkey_task = NULL;
1783 printk(TPACPI_ERR
1784 "could not create kernel thread "
1785 "for hotkey polling\n");
1786 }
1787 }
1788 } else {
1789 hotkey_poll_stop_sync();
1790 if (may_warn &&
1791 hotkey_source_mask != 0 && hotkey_poll_freq == 0) {
1792 printk(TPACPI_NOTICE
1793 "hot keys 0x%08x require polling, "
1794 "which is currently disabled\n",
1795 hotkey_source_mask);
1796 }
1797 }
1798 }
1799
1800 static void hotkey_poll_setup_safe(int may_warn)
1801 {
1802 mutex_lock(&hotkey_mutex);
1803 hotkey_poll_setup(may_warn);
1804 mutex_unlock(&hotkey_mutex);
1805 }
1806
1807 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1808
1809 static void hotkey_poll_setup_safe(int __unused)
1810 {
1811 }
1812
1813 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1814
1815 static int hotkey_inputdev_open(struct input_dev *dev)
1816 {
1817 switch (tpacpi_lifecycle) {
1818 case TPACPI_LIFE_INIT:
1819 /*
1820 * hotkey_init will call hotkey_poll_setup_safe
1821 * at the appropriate moment
1822 */
1823 return 0;
1824 case TPACPI_LIFE_EXITING:
1825 return -EBUSY;
1826 case TPACPI_LIFE_RUNNING:
1827 hotkey_poll_setup_safe(0);
1828 return 0;
1829 }
1830
1831 /* Should only happen if tpacpi_lifecycle is corrupt */
1832 BUG();
1833 return -EBUSY;
1834 }
1835
1836 static void hotkey_inputdev_close(struct input_dev *dev)
1837 {
1838 /* disable hotkey polling when possible */
1839 if (tpacpi_lifecycle == TPACPI_LIFE_RUNNING)
1840 hotkey_poll_setup_safe(0);
1841 }
1842
1843 /* sysfs hotkey enable ------------------------------------------------- */
1844 static ssize_t hotkey_enable_show(struct device *dev,
1845 struct device_attribute *attr,
1846 char *buf)
1847 {
1848 int res, status;
1849
1850 res = hotkey_status_get(&status);
1851 if (res)
1852 return res;
1853
1854 return snprintf(buf, PAGE_SIZE, "%d\n", status);
1855 }
1856
1857 static ssize_t hotkey_enable_store(struct device *dev,
1858 struct device_attribute *attr,
1859 const char *buf, size_t count)
1860 {
1861 unsigned long t;
1862 int res;
1863
1864 if (parse_strtoul(buf, 1, &t))
1865 return -EINVAL;
1866
1867 res = hotkey_status_set(t);
1868
1869 return (res) ? res : count;
1870 }
1871
1872 static struct device_attribute dev_attr_hotkey_enable =
1873 __ATTR(hotkey_enable, S_IWUSR | S_IRUGO,
1874 hotkey_enable_show, hotkey_enable_store);
1875
1876 /* sysfs hotkey mask --------------------------------------------------- */
1877 static ssize_t hotkey_mask_show(struct device *dev,
1878 struct device_attribute *attr,
1879 char *buf)
1880 {
1881 int res;
1882
1883 if (mutex_lock_killable(&hotkey_mutex))
1884 return -ERESTARTSYS;
1885 res = hotkey_mask_get();
1886 mutex_unlock(&hotkey_mutex);
1887
1888 return (res)?
1889 res : snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_mask);
1890 }
1891
1892 static ssize_t hotkey_mask_store(struct device *dev,
1893 struct device_attribute *attr,
1894 const char *buf, size_t count)
1895 {
1896 unsigned long t;
1897 int res;
1898
1899 if (parse_strtoul(buf, 0xffffffffUL, &t))
1900 return -EINVAL;
1901
1902 if (mutex_lock_killable(&hotkey_mutex))
1903 return -ERESTARTSYS;
1904
1905 res = hotkey_mask_set(t);
1906
1907 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1908 hotkey_poll_setup(1);
1909 #endif
1910
1911 mutex_unlock(&hotkey_mutex);
1912
1913 return (res) ? res : count;
1914 }
1915
1916 static struct device_attribute dev_attr_hotkey_mask =
1917 __ATTR(hotkey_mask, S_IWUSR | S_IRUGO,
1918 hotkey_mask_show, hotkey_mask_store);
1919
1920 /* sysfs hotkey bios_enabled ------------------------------------------- */
1921 static ssize_t hotkey_bios_enabled_show(struct device *dev,
1922 struct device_attribute *attr,
1923 char *buf)
1924 {
1925 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_orig_status);
1926 }
1927
1928 static struct device_attribute dev_attr_hotkey_bios_enabled =
1929 __ATTR(hotkey_bios_enabled, S_IRUGO, hotkey_bios_enabled_show, NULL);
1930
1931 /* sysfs hotkey bios_mask ---------------------------------------------- */
1932 static ssize_t hotkey_bios_mask_show(struct device *dev,
1933 struct device_attribute *attr,
1934 char *buf)
1935 {
1936 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_orig_mask);
1937 }
1938
1939 static struct device_attribute dev_attr_hotkey_bios_mask =
1940 __ATTR(hotkey_bios_mask, S_IRUGO, hotkey_bios_mask_show, NULL);
1941
1942 /* sysfs hotkey all_mask ----------------------------------------------- */
1943 static ssize_t hotkey_all_mask_show(struct device *dev,
1944 struct device_attribute *attr,
1945 char *buf)
1946 {
1947 return snprintf(buf, PAGE_SIZE, "0x%08x\n",
1948 hotkey_all_mask | hotkey_source_mask);
1949 }
1950
1951 static struct device_attribute dev_attr_hotkey_all_mask =
1952 __ATTR(hotkey_all_mask, S_IRUGO, hotkey_all_mask_show, NULL);
1953
1954 /* sysfs hotkey recommended_mask --------------------------------------- */
1955 static ssize_t hotkey_recommended_mask_show(struct device *dev,
1956 struct device_attribute *attr,
1957 char *buf)
1958 {
1959 return snprintf(buf, PAGE_SIZE, "0x%08x\n",
1960 (hotkey_all_mask | hotkey_source_mask)
1961 & ~hotkey_reserved_mask);
1962 }
1963
1964 static struct device_attribute dev_attr_hotkey_recommended_mask =
1965 __ATTR(hotkey_recommended_mask, S_IRUGO,
1966 hotkey_recommended_mask_show, NULL);
1967
1968 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1969
1970 /* sysfs hotkey hotkey_source_mask ------------------------------------- */
1971 static ssize_t hotkey_source_mask_show(struct device *dev,
1972 struct device_attribute *attr,
1973 char *buf)
1974 {
1975 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_source_mask);
1976 }
1977
1978 static ssize_t hotkey_source_mask_store(struct device *dev,
1979 struct device_attribute *attr,
1980 const char *buf, size_t count)
1981 {
1982 unsigned long t;
1983
1984 if (parse_strtoul(buf, 0xffffffffUL, &t) ||
1985 ((t & ~TPACPI_HKEY_NVRAM_KNOWN_MASK) != 0))
1986 return -EINVAL;
1987
1988 if (mutex_lock_killable(&hotkey_mutex))
1989 return -ERESTARTSYS;
1990
1991 HOTKEY_CONFIG_CRITICAL_START
1992 hotkey_source_mask = t;
1993 HOTKEY_CONFIG_CRITICAL_END
1994
1995 hotkey_poll_setup(1);
1996
1997 mutex_unlock(&hotkey_mutex);
1998
1999 return count;
2000 }
2001
2002 static struct device_attribute dev_attr_hotkey_source_mask =
2003 __ATTR(hotkey_source_mask, S_IWUSR | S_IRUGO,
2004 hotkey_source_mask_show, hotkey_source_mask_store);
2005
2006 /* sysfs hotkey hotkey_poll_freq --------------------------------------- */
2007 static ssize_t hotkey_poll_freq_show(struct device *dev,
2008 struct device_attribute *attr,
2009 char *buf)
2010 {
2011 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_poll_freq);
2012 }
2013
2014 static ssize_t hotkey_poll_freq_store(struct device *dev,
2015 struct device_attribute *attr,
2016 const char *buf, size_t count)
2017 {
2018 unsigned long t;
2019
2020 if (parse_strtoul(buf, 25, &t))
2021 return -EINVAL;
2022
2023 if (mutex_lock_killable(&hotkey_mutex))
2024 return -ERESTARTSYS;
2025
2026 hotkey_poll_freq = t;
2027
2028 hotkey_poll_setup(1);
2029 mutex_unlock(&hotkey_mutex);
2030
2031 return count;
2032 }
2033
2034 static struct device_attribute dev_attr_hotkey_poll_freq =
2035 __ATTR(hotkey_poll_freq, S_IWUSR | S_IRUGO,
2036 hotkey_poll_freq_show, hotkey_poll_freq_store);
2037
2038 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2039
2040 /* sysfs hotkey radio_sw (pollable) ------------------------------------ */
2041 static ssize_t hotkey_radio_sw_show(struct device *dev,
2042 struct device_attribute *attr,
2043 char *buf)
2044 {
2045 int res, s;
2046 res = hotkey_get_wlsw(&s);
2047 if (res < 0)
2048 return res;
2049
2050 return snprintf(buf, PAGE_SIZE, "%d\n", !!s);
2051 }
2052
2053 static struct device_attribute dev_attr_hotkey_radio_sw =
2054 __ATTR(hotkey_radio_sw, S_IRUGO, hotkey_radio_sw_show, NULL);
2055
2056 static void hotkey_radio_sw_notify_change(void)
2057 {
2058 if (tp_features.hotkey_wlsw)
2059 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2060 "hotkey_radio_sw");
2061 }
2062
2063 /* sysfs hotkey tablet mode (pollable) --------------------------------- */
2064 static ssize_t hotkey_tablet_mode_show(struct device *dev,
2065 struct device_attribute *attr,
2066 char *buf)
2067 {
2068 int res, s;
2069 res = hotkey_get_tablet_mode(&s);
2070 if (res < 0)
2071 return res;
2072
2073 return snprintf(buf, PAGE_SIZE, "%d\n", !!s);
2074 }
2075
2076 static struct device_attribute dev_attr_hotkey_tablet_mode =
2077 __ATTR(hotkey_tablet_mode, S_IRUGO, hotkey_tablet_mode_show, NULL);
2078
2079 static void hotkey_tablet_mode_notify_change(void)
2080 {
2081 if (tp_features.hotkey_tablet)
2082 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2083 "hotkey_tablet_mode");
2084 }
2085
2086 /* sysfs hotkey report_mode -------------------------------------------- */
2087 static ssize_t hotkey_report_mode_show(struct device *dev,
2088 struct device_attribute *attr,
2089 char *buf)
2090 {
2091 return snprintf(buf, PAGE_SIZE, "%d\n",
2092 (hotkey_report_mode != 0) ? hotkey_report_mode : 1);
2093 }
2094
2095 static struct device_attribute dev_attr_hotkey_report_mode =
2096 __ATTR(hotkey_report_mode, S_IRUGO, hotkey_report_mode_show, NULL);
2097
2098 /* sysfs wakeup reason (pollable) -------------------------------------- */
2099 static ssize_t hotkey_wakeup_reason_show(struct device *dev,
2100 struct device_attribute *attr,
2101 char *buf)
2102 {
2103 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_wakeup_reason);
2104 }
2105
2106 static struct device_attribute dev_attr_hotkey_wakeup_reason =
2107 __ATTR(wakeup_reason, S_IRUGO, hotkey_wakeup_reason_show, NULL);
2108
2109 static void hotkey_wakeup_reason_notify_change(void)
2110 {
2111 if (tp_features.hotkey_mask)
2112 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2113 "wakeup_reason");
2114 }
2115
2116 /* sysfs wakeup hotunplug_complete (pollable) -------------------------- */
2117 static ssize_t hotkey_wakeup_hotunplug_complete_show(struct device *dev,
2118 struct device_attribute *attr,
2119 char *buf)
2120 {
2121 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_autosleep_ack);
2122 }
2123
2124 static struct device_attribute dev_attr_hotkey_wakeup_hotunplug_complete =
2125 __ATTR(wakeup_hotunplug_complete, S_IRUGO,
2126 hotkey_wakeup_hotunplug_complete_show, NULL);
2127
2128 static void hotkey_wakeup_hotunplug_complete_notify_change(void)
2129 {
2130 if (tp_features.hotkey_mask)
2131 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2132 "wakeup_hotunplug_complete");
2133 }
2134
2135 /* --------------------------------------------------------------------- */
2136
2137 static struct attribute *hotkey_attributes[] __initdata = {
2138 &dev_attr_hotkey_enable.attr,
2139 &dev_attr_hotkey_bios_enabled.attr,
2140 &dev_attr_hotkey_report_mode.attr,
2141 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2142 &dev_attr_hotkey_mask.attr,
2143 &dev_attr_hotkey_all_mask.attr,
2144 &dev_attr_hotkey_recommended_mask.attr,
2145 &dev_attr_hotkey_source_mask.attr,
2146 &dev_attr_hotkey_poll_freq.attr,
2147 #endif
2148 };
2149
2150 static struct attribute *hotkey_mask_attributes[] __initdata = {
2151 &dev_attr_hotkey_bios_mask.attr,
2152 #ifndef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2153 &dev_attr_hotkey_mask.attr,
2154 &dev_attr_hotkey_all_mask.attr,
2155 &dev_attr_hotkey_recommended_mask.attr,
2156 #endif
2157 &dev_attr_hotkey_wakeup_reason.attr,
2158 &dev_attr_hotkey_wakeup_hotunplug_complete.attr,
2159 };
2160
2161 static void bluetooth_update_rfk(void);
2162 static void wan_update_rfk(void);
2163 static void uwb_update_rfk(void);
2164 static void tpacpi_send_radiosw_update(void)
2165 {
2166 int wlsw;
2167
2168 /* Sync these BEFORE sending any rfkill events */
2169 if (tp_features.bluetooth)
2170 bluetooth_update_rfk();
2171 if (tp_features.wan)
2172 wan_update_rfk();
2173 if (tp_features.uwb)
2174 uwb_update_rfk();
2175
2176 if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&wlsw)) {
2177 mutex_lock(&tpacpi_inputdev_send_mutex);
2178
2179 input_report_switch(tpacpi_inputdev,
2180 SW_RFKILL_ALL, !!wlsw);
2181 input_sync(tpacpi_inputdev);
2182
2183 mutex_unlock(&tpacpi_inputdev_send_mutex);
2184 }
2185 hotkey_radio_sw_notify_change();
2186 }
2187
2188 static void hotkey_exit(void)
2189 {
2190 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2191 hotkey_poll_stop_sync();
2192 #endif
2193
2194 if (hotkey_dev_attributes)
2195 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
2196
2197 kfree(hotkey_keycode_map);
2198
2199 if (tp_features.hotkey) {
2200 dbg_printk(TPACPI_DBG_EXIT,
2201 "restoring original hot key mask\n");
2202 /* no short-circuit boolean operator below! */
2203 if ((hotkey_mask_set(hotkey_orig_mask) |
2204 hotkey_status_set(hotkey_orig_status)) != 0)
2205 printk(TPACPI_ERR
2206 "failed to restore hot key mask "
2207 "to BIOS defaults\n");
2208 }
2209 }
2210
2211 static int __init hotkey_init(struct ibm_init_struct *iibm)
2212 {
2213 /* Requirements for changing the default keymaps:
2214 *
2215 * 1. Many of the keys are mapped to KEY_RESERVED for very
2216 * good reasons. Do not change them unless you have deep
2217 * knowledge on the IBM and Lenovo ThinkPad firmware for
2218 * the various ThinkPad models. The driver behaves
2219 * differently for KEY_RESERVED: such keys have their
2220 * hot key mask *unset* in mask_recommended, and also
2221 * in the initial hot key mask programmed into the
2222 * firmware at driver load time, which means the firm-
2223 * ware may react very differently if you change them to
2224 * something else;
2225 *
2226 * 2. You must be subscribed to the linux-thinkpad and
2227 * ibm-acpi-devel mailing lists, and you should read the
2228 * list archives since 2007 if you want to change the
2229 * keymaps. This requirement exists so that you will
2230 * know the past history of problems with the thinkpad-
2231 * acpi driver keymaps, and also that you will be
2232 * listening to any bug reports;
2233 *
2234 * 3. Do not send thinkpad-acpi specific patches directly to
2235 * for merging, *ever*. Send them to the linux-acpi
2236 * mailinglist for comments. Merging is to be done only
2237 * through acpi-test and the ACPI maintainer.
2238 *
2239 * If the above is too much to ask, don't change the keymap.
2240 * Ask the thinkpad-acpi maintainer to do it, instead.
2241 */
2242 static u16 ibm_keycode_map[] __initdata = {
2243 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
2244 KEY_FN_F1, KEY_FN_F2, KEY_COFFEE, KEY_SLEEP,
2245 KEY_WLAN, KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
2246 KEY_FN_F9, KEY_FN_F10, KEY_FN_F11, KEY_SUSPEND,
2247
2248 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
2249 KEY_UNKNOWN, /* 0x0C: FN+BACKSPACE */
2250 KEY_UNKNOWN, /* 0x0D: FN+INSERT */
2251 KEY_UNKNOWN, /* 0x0E: FN+DELETE */
2252
2253 /* brightness: firmware always reacts to them, unless
2254 * X.org did some tricks in the radeon BIOS scratch
2255 * registers of *some* models */
2256 KEY_RESERVED, /* 0x0F: FN+HOME (brightness up) */
2257 KEY_RESERVED, /* 0x10: FN+END (brightness down) */
2258
2259 /* Thinklight: firmware always react to it */
2260 KEY_RESERVED, /* 0x11: FN+PGUP (thinklight toggle) */
2261
2262 KEY_UNKNOWN, /* 0x12: FN+PGDOWN */
2263 KEY_ZOOM, /* 0x13: FN+SPACE (zoom) */
2264
2265 /* Volume: firmware always react to it and reprograms
2266 * the built-in *extra* mixer. Never map it to control
2267 * another mixer by default. */
2268 KEY_RESERVED, /* 0x14: VOLUME UP */
2269 KEY_RESERVED, /* 0x15: VOLUME DOWN */
2270 KEY_RESERVED, /* 0x16: MUTE */
2271
2272 KEY_VENDOR, /* 0x17: Thinkpad/AccessIBM/Lenovo */
2273
2274 /* (assignments unknown, please report if found) */
2275 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
2276 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
2277 };
2278 static u16 lenovo_keycode_map[] __initdata = {
2279 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
2280 KEY_FN_F1, KEY_COFFEE, KEY_BATTERY, KEY_SLEEP,
2281 KEY_WLAN, KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
2282 KEY_FN_F9, KEY_FN_F10, KEY_FN_F11, KEY_SUSPEND,
2283
2284 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
2285 KEY_UNKNOWN, /* 0x0C: FN+BACKSPACE */
2286 KEY_UNKNOWN, /* 0x0D: FN+INSERT */
2287 KEY_UNKNOWN, /* 0x0E: FN+DELETE */
2288
2289 /* These either have to go through ACPI video, or
2290 * act like in the IBM ThinkPads, so don't ever
2291 * enable them by default */
2292 KEY_RESERVED, /* 0x0F: FN+HOME (brightness up) */
2293 KEY_RESERVED, /* 0x10: FN+END (brightness down) */
2294
2295 KEY_RESERVED, /* 0x11: FN+PGUP (thinklight toggle) */
2296
2297 KEY_UNKNOWN, /* 0x12: FN+PGDOWN */
2298 KEY_ZOOM, /* 0x13: FN+SPACE (zoom) */
2299
2300 /* Volume: z60/z61, T60 (BIOS version?): firmware always
2301 * react to it and reprograms the built-in *extra* mixer.
2302 * Never map it to control another mixer by default.
2303 *
2304 * T60?, T61, R60?, R61: firmware and EC tries to send
2305 * these over the regular keyboard, so these are no-ops,
2306 * but there are still weird bugs re. MUTE, so do not
2307 * change unless you get test reports from all Lenovo
2308 * models. May cause the BIOS to interfere with the
2309 * HDA mixer.
2310 */
2311 KEY_RESERVED, /* 0x14: VOLUME UP */
2312 KEY_RESERVED, /* 0x15: VOLUME DOWN */
2313 KEY_RESERVED, /* 0x16: MUTE */
2314
2315 KEY_VENDOR, /* 0x17: Thinkpad/AccessIBM/Lenovo */
2316
2317 /* (assignments unknown, please report if found) */
2318 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
2319 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
2320 };
2321
2322 #define TPACPI_HOTKEY_MAP_LEN ARRAY_SIZE(ibm_keycode_map)
2323 #define TPACPI_HOTKEY_MAP_SIZE sizeof(ibm_keycode_map)
2324 #define TPACPI_HOTKEY_MAP_TYPESIZE sizeof(ibm_keycode_map[0])
2325
2326 int res, i;
2327 int status;
2328 int hkeyv;
2329
2330 vdbg_printk(TPACPI_DBG_INIT, "initializing hotkey subdriver\n");
2331
2332 BUG_ON(!tpacpi_inputdev);
2333 BUG_ON(tpacpi_inputdev->open != NULL ||
2334 tpacpi_inputdev->close != NULL);
2335
2336 TPACPI_ACPIHANDLE_INIT(hkey);
2337 mutex_init(&hotkey_mutex);
2338
2339 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2340 mutex_init(&hotkey_thread_mutex);
2341 mutex_init(&hotkey_thread_data_mutex);
2342 #endif
2343
2344 /* hotkey not supported on 570 */
2345 tp_features.hotkey = hkey_handle != NULL;
2346
2347 vdbg_printk(TPACPI_DBG_INIT, "hotkeys are %s\n",
2348 str_supported(tp_features.hotkey));
2349
2350 if (!tp_features.hotkey)
2351 return 1;
2352
2353 tpacpi_disable_brightness_delay();
2354
2355 hotkey_dev_attributes = create_attr_set(13, NULL);
2356 if (!hotkey_dev_attributes)
2357 return -ENOMEM;
2358 res = add_many_to_attr_set(hotkey_dev_attributes,
2359 hotkey_attributes,
2360 ARRAY_SIZE(hotkey_attributes));
2361 if (res)
2362 goto err_exit;
2363
2364 /* mask not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
2365 A30, R30, R31, T20-22, X20-21, X22-24. Detected by checking
2366 for HKEY interface version 0x100 */
2367 if (acpi_evalf(hkey_handle, &hkeyv, "MHKV", "qd")) {
2368 if ((hkeyv >> 8) != 1) {
2369 printk(TPACPI_ERR "unknown version of the "
2370 "HKEY interface: 0x%x\n", hkeyv);
2371 printk(TPACPI_ERR "please report this to %s\n",
2372 TPACPI_MAIL);
2373 } else {
2374 /*
2375 * MHKV 0x100 in A31, R40, R40e,
2376 * T4x, X31, and later
2377 */
2378 tp_features.hotkey_mask = 1;
2379 }
2380 }
2381
2382 vdbg_printk(TPACPI_DBG_INIT, "hotkey masks are %s\n",
2383 str_supported(tp_features.hotkey_mask));
2384
2385 if (tp_features.hotkey_mask) {
2386 if (!acpi_evalf(hkey_handle, &hotkey_all_mask,
2387 "MHKA", "qd")) {
2388 printk(TPACPI_ERR
2389 "missing MHKA handler, "
2390 "please report this to %s\n",
2391 TPACPI_MAIL);
2392 /* FN+F12, FN+F4, FN+F3 */
2393 hotkey_all_mask = 0x080cU;
2394 }
2395 }
2396
2397 /* hotkey_source_mask *must* be zero for
2398 * the first hotkey_mask_get */
2399 res = hotkey_status_get(&hotkey_orig_status);
2400 if (res)
2401 goto err_exit;
2402
2403 if (tp_features.hotkey_mask) {
2404 res = hotkey_mask_get();
2405 if (res)
2406 goto err_exit;
2407
2408 hotkey_orig_mask = hotkey_mask;
2409 res = add_many_to_attr_set(
2410 hotkey_dev_attributes,
2411 hotkey_mask_attributes,
2412 ARRAY_SIZE(hotkey_mask_attributes));
2413 if (res)
2414 goto err_exit;
2415 }
2416
2417 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2418 if (tp_features.hotkey_mask) {
2419 hotkey_source_mask = TPACPI_HKEY_NVRAM_GOOD_MASK
2420 & ~hotkey_all_mask;
2421 } else {
2422 hotkey_source_mask = TPACPI_HKEY_NVRAM_GOOD_MASK;
2423 }
2424
2425 vdbg_printk(TPACPI_DBG_INIT,
2426 "hotkey source mask 0x%08x, polling freq %d\n",
2427 hotkey_source_mask, hotkey_poll_freq);
2428 #endif
2429
2430 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
2431 if (dbg_wlswemul) {
2432 tp_features.hotkey_wlsw = 1;
2433 printk(TPACPI_INFO
2434 "radio switch emulation enabled\n");
2435 } else
2436 #endif
2437 /* Not all thinkpads have a hardware radio switch */
2438 if (acpi_evalf(hkey_handle, &status, "WLSW", "qd")) {
2439 tp_features.hotkey_wlsw = 1;
2440 printk(TPACPI_INFO
2441 "radio switch found; radios are %s\n",
2442 enabled(status, 0));
2443 }
2444 if (tp_features.hotkey_wlsw)
2445 res = add_to_attr_set(hotkey_dev_attributes,
2446 &dev_attr_hotkey_radio_sw.attr);
2447
2448 /* For X41t, X60t, X61t Tablets... */
2449 if (!res && acpi_evalf(hkey_handle, &status, "MHKG", "qd")) {
2450 tp_features.hotkey_tablet = 1;
2451 printk(TPACPI_INFO
2452 "possible tablet mode switch found; "
2453 "ThinkPad in %s mode\n",
2454 (status & TP_HOTKEY_TABLET_MASK)?
2455 "tablet" : "laptop");
2456 res = add_to_attr_set(hotkey_dev_attributes,
2457 &dev_attr_hotkey_tablet_mode.attr);
2458 }
2459
2460 if (!res)
2461 res = register_attr_set_with_sysfs(
2462 hotkey_dev_attributes,
2463 &tpacpi_pdev->dev.kobj);
2464 if (res)
2465 goto err_exit;
2466
2467 /* Set up key map */
2468
2469 hotkey_keycode_map = kmalloc(TPACPI_HOTKEY_MAP_SIZE,
2470 GFP_KERNEL);
2471 if (!hotkey_keycode_map) {
2472 printk(TPACPI_ERR
2473 "failed to allocate memory for key map\n");
2474 res = -ENOMEM;
2475 goto err_exit;
2476 }
2477
2478 if (thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO) {
2479 dbg_printk(TPACPI_DBG_INIT,
2480 "using Lenovo default hot key map\n");
2481 memcpy(hotkey_keycode_map, &lenovo_keycode_map,
2482 TPACPI_HOTKEY_MAP_SIZE);
2483 } else {
2484 dbg_printk(TPACPI_DBG_INIT,
2485 "using IBM default hot key map\n");
2486 memcpy(hotkey_keycode_map, &ibm_keycode_map,
2487 TPACPI_HOTKEY_MAP_SIZE);
2488 }
2489
2490 set_bit(EV_KEY, tpacpi_inputdev->evbit);
2491 set_bit(EV_MSC, tpacpi_inputdev->evbit);
2492 set_bit(MSC_SCAN, tpacpi_inputdev->mscbit);
2493 tpacpi_inputdev->keycodesize = TPACPI_HOTKEY_MAP_TYPESIZE;
2494 tpacpi_inputdev->keycodemax = TPACPI_HOTKEY_MAP_LEN;
2495 tpacpi_inputdev->keycode = hotkey_keycode_map;
2496 for (i = 0; i < TPACPI_HOTKEY_MAP_LEN; i++) {
2497 if (hotkey_keycode_map[i] != KEY_RESERVED) {
2498 set_bit(hotkey_keycode_map[i],
2499 tpacpi_inputdev->keybit);
2500 } else {
2501 if (i < sizeof(hotkey_reserved_mask)*8)
2502 hotkey_reserved_mask |= 1 << i;
2503 }
2504 }
2505
2506 if (tp_features.hotkey_wlsw) {
2507 set_bit(EV_SW, tpacpi_inputdev->evbit);
2508 set_bit(SW_RFKILL_ALL, tpacpi_inputdev->swbit);
2509 }
2510 if (tp_features.hotkey_tablet) {
2511 set_bit(EV_SW, tpacpi_inputdev->evbit);
2512 set_bit(SW_TABLET_MODE, tpacpi_inputdev->swbit);
2513 }
2514
2515 /* Do not issue duplicate brightness change events to
2516 * userspace */
2517 if (!tp_features.bright_acpimode)
2518 /* update bright_acpimode... */
2519 tpacpi_check_std_acpi_brightness_support();
2520
2521 if (tp_features.bright_acpimode) {
2522 printk(TPACPI_INFO
2523 "This ThinkPad has standard ACPI backlight "
2524 "brightness control, supported by the ACPI "
2525 "video driver\n");
2526 printk(TPACPI_NOTICE
2527 "Disabling thinkpad-acpi brightness events "
2528 "by default...\n");
2529
2530 /* The hotkey_reserved_mask change below is not
2531 * necessary while the keys are at KEY_RESERVED in the
2532 * default map, but better safe than sorry, leave it
2533 * here as a marker of what we have to do, especially
2534 * when we finally become able to set this at runtime
2535 * on response to X.org requests */
2536 hotkey_reserved_mask |=
2537 (1 << TP_ACPI_HOTKEYSCAN_FNHOME)
2538 | (1 << TP_ACPI_HOTKEYSCAN_FNEND);
2539 }
2540
2541 dbg_printk(TPACPI_DBG_INIT, "enabling hot key handling\n");
2542 res = hotkey_status_set(1);
2543 if (res) {
2544 hotkey_exit();
2545 return res;
2546 }
2547 res = hotkey_mask_set(((hotkey_all_mask | hotkey_source_mask)
2548 & ~hotkey_reserved_mask)
2549 | hotkey_orig_mask);
2550 if (res < 0 && res != -ENXIO) {
2551 hotkey_exit();
2552 return res;
2553 }
2554
2555 dbg_printk(TPACPI_DBG_INIT,
2556 "legacy hot key reporting over procfs %s\n",
2557 (hotkey_report_mode < 2) ?
2558 "enabled" : "disabled");
2559
2560 tpacpi_inputdev->open = &hotkey_inputdev_open;
2561 tpacpi_inputdev->close = &hotkey_inputdev_close;
2562
2563 hotkey_poll_setup_safe(1);
2564 tpacpi_send_radiosw_update();
2565 tpacpi_input_send_tabletsw();
2566
2567 return 0;
2568
2569 err_exit:
2570 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
2571 hotkey_dev_attributes = NULL;
2572
2573 return (res < 0)? res : 1;
2574 }
2575
2576 static bool hotkey_notify_hotkey(const u32 hkey,
2577 bool *send_acpi_ev,
2578 bool *ignore_acpi_ev)
2579 {
2580 /* 0x1000-0x1FFF: key presses */
2581 unsigned int scancode = hkey & 0xfff;
2582 *send_acpi_ev = true;
2583 *ignore_acpi_ev = false;
2584
2585 if (scancode > 0 && scancode < 0x21) {
2586 scancode--;
2587 if (!(hotkey_source_mask & (1 << scancode))) {
2588 tpacpi_input_send_key(scancode);
2589 *send_acpi_ev = false;
2590 } else {
2591 *ignore_acpi_ev = true;
2592 }
2593 return true;
2594 }
2595 return false;
2596 }
2597
2598 static bool hotkey_notify_wakeup(const u32 hkey,
2599 bool *send_acpi_ev,
2600 bool *ignore_acpi_ev)
2601 {
2602 /* 0x2000-0x2FFF: Wakeup reason */
2603 *send_acpi_ev = true;
2604 *ignore_acpi_ev = false;
2605
2606 switch (hkey) {
2607 case 0x2304: /* suspend, undock */
2608 case 0x2404: /* hibernation, undock */
2609 hotkey_wakeup_reason = TP_ACPI_WAKEUP_UNDOCK;
2610 *ignore_acpi_ev = true;
2611 break;
2612
2613 case 0x2305: /* suspend, bay eject */
2614 case 0x2405: /* hibernation, bay eject */
2615 hotkey_wakeup_reason = TP_ACPI_WAKEUP_BAYEJ;
2616 *ignore_acpi_ev = true;
2617 break;
2618
2619 case 0x2313: /* Battery on critical low level (S3) */
2620 case 0x2413: /* Battery on critical low level (S4) */
2621 printk(TPACPI_ALERT
2622 "EMERGENCY WAKEUP: battery almost empty\n");
2623 /* how to auto-heal: */
2624 /* 2313: woke up from S3, go to S4/S5 */
2625 /* 2413: woke up from S4, go to S5 */
2626 break;
2627
2628 default:
2629 return false;
2630 }
2631
2632 if (hotkey_wakeup_reason != TP_ACPI_WAKEUP_NONE) {
2633 printk(TPACPI_INFO
2634 "woke up due to a hot-unplug "
2635 "request...\n");
2636 hotkey_wakeup_reason_notify_change();
2637 }
2638 return true;
2639 }
2640
2641 static bool hotkey_notify_usrevent(const u32 hkey,
2642 bool *send_acpi_ev,
2643 bool *ignore_acpi_ev)
2644 {
2645 /* 0x5000-0x5FFF: human interface helpers */
2646 *send_acpi_ev = true;
2647 *ignore_acpi_ev = false;
2648
2649 switch (hkey) {
2650 case 0x5010: /* Lenovo new BIOS: brightness changed */
2651 case 0x500b: /* X61t: tablet pen inserted into bay */
2652 case 0x500c: /* X61t: tablet pen removed from bay */
2653 return true;
2654
2655 case 0x5009: /* X41t-X61t: swivel up (tablet mode) */
2656 case 0x500a: /* X41t-X61t: swivel down (normal mode) */
2657 tpacpi_input_send_tabletsw();
2658 hotkey_tablet_mode_notify_change();
2659 *send_acpi_ev = false;
2660 return true;
2661
2662 case 0x5001:
2663 case 0x5002:
2664 /* LID switch events. Do not propagate */
2665 *ignore_acpi_ev = true;
2666 return true;
2667
2668 default:
2669 return false;
2670 }
2671 }
2672
2673 static bool hotkey_notify_thermal(const u32 hkey,
2674 bool *send_acpi_ev,
2675 bool *ignore_acpi_ev)
2676 {
2677 /* 0x6000-0x6FFF: thermal alarms */
2678 *send_acpi_ev = true;
2679 *ignore_acpi_ev = false;
2680
2681 switch (hkey) {
2682 case 0x6011:
2683 printk(TPACPI_CRIT
2684 "THERMAL ALARM: battery is too hot!\n");
2685 /* recommended action: warn user through gui */
2686 return true;
2687 case 0x6012:
2688 printk(TPACPI_ALERT
2689 "THERMAL EMERGENCY: battery is extremely hot!\n");
2690 /* recommended action: immediate sleep/hibernate */
2691 return true;
2692 case 0x6021:
2693 printk(TPACPI_CRIT
2694 "THERMAL ALARM: "
2695 "a sensor reports something is too hot!\n");
2696 /* recommended action: warn user through gui, that */
2697 /* some internal component is too hot */
2698 return true;
2699 case 0x6022:
2700 printk(TPACPI_ALERT
2701 "THERMAL EMERGENCY: "
2702 "a sensor reports something is extremely hot!\n");
2703 /* recommended action: immediate sleep/hibernate */
2704 return true;
2705 default:
2706 printk(TPACPI_ALERT
2707 "THERMAL ALERT: unknown thermal alarm received\n");
2708 return false;
2709 }
2710 }
2711
2712 static void hotkey_notify(struct ibm_struct *ibm, u32 event)
2713 {
2714 u32 hkey;
2715 bool send_acpi_ev;
2716 bool ignore_acpi_ev;
2717 bool known_ev;
2718
2719 if (event != 0x80) {
2720 printk(TPACPI_ERR
2721 "unknown HKEY notification event %d\n", event);
2722 /* forward it to userspace, maybe it knows how to handle it */
2723 acpi_bus_generate_netlink_event(
2724 ibm->acpi->device->pnp.device_class,
2725 dev_name(&ibm->acpi->device->dev),
2726 event, 0);
2727 return;
2728 }
2729
2730 while (1) {
2731 if (!acpi_evalf(hkey_handle, &hkey, "MHKP", "d")) {
2732 printk(TPACPI_ERR "failed to retrieve HKEY event\n");
2733 return;
2734 }
2735
2736 if (hkey == 0) {
2737 /* queue empty */
2738 return;
2739 }
2740
2741 send_acpi_ev = true;
2742 ignore_acpi_ev = false;
2743
2744 switch (hkey >> 12) {
2745 case 1:
2746 /* 0x1000-0x1FFF: key presses */
2747 known_ev = hotkey_notify_hotkey(hkey, &send_acpi_ev,
2748 &ignore_acpi_ev);
2749 break;
2750 case 2:
2751 /* 0x2000-0x2FFF: Wakeup reason */
2752 known_ev = hotkey_notify_wakeup(hkey, &send_acpi_ev,
2753 &ignore_acpi_ev);
2754 break;
2755 case 3:
2756 /* 0x3000-0x3FFF: bay-related wakeups */
2757 if (hkey == 0x3003) {
2758 hotkey_autosleep_ack = 1;
2759 printk(TPACPI_INFO
2760 "bay ejected\n");
2761 hotkey_wakeup_hotunplug_complete_notify_change();
2762 known_ev = true;
2763 } else {
2764 known_ev = false;
2765 }
2766 break;
2767 case 4:
2768 /* 0x4000-0x4FFF: dock-related wakeups */
2769 if (hkey == 0x4003) {
2770 hotkey_autosleep_ack = 1;
2771 printk(TPACPI_INFO
2772 "undocked\n");
2773 hotkey_wakeup_hotunplug_complete_notify_change();
2774 known_ev = true;
2775 } else {
2776 known_ev = false;
2777 }
2778 break;
2779 case 5:
2780 /* 0x5000-0x5FFF: human interface helpers */
2781 known_ev = hotkey_notify_usrevent(hkey, &send_acpi_ev,
2782 &ignore_acpi_ev);
2783 break;
2784 case 6:
2785 /* 0x6000-0x6FFF: thermal alarms */
2786 known_ev = hotkey_notify_thermal(hkey, &send_acpi_ev,
2787 &ignore_acpi_ev);
2788 break;
2789 case 7:
2790 /* 0x7000-0x7FFF: misc */
2791 if (tp_features.hotkey_wlsw && hkey == 0x7000) {
2792 tpacpi_send_radiosw_update();
2793 send_acpi_ev = 0;
2794 known_ev = true;
2795 break;
2796 }
2797 /* fallthrough to default */
2798 default:
2799 known_ev = false;
2800 }
2801 if (!known_ev) {
2802 printk(TPACPI_NOTICE
2803 "unhandled HKEY event 0x%04x\n", hkey);
2804 }
2805
2806 /* Legacy events */
2807 if (!ignore_acpi_ev &&
2808 (send_acpi_ev || hotkey_report_mode < 2)) {
2809 acpi_bus_generate_proc_event(ibm->acpi->device,
2810 event, hkey);
2811 }
2812
2813 /* netlink events */
2814 if (!ignore_acpi_ev && send_acpi_ev) {
2815 acpi_bus_generate_netlink_event(
2816 ibm->acpi->device->pnp.device_class,
2817 dev_name(&ibm->acpi->device->dev),
2818 event, hkey);
2819 }
2820 }
2821 }
2822
2823 static void hotkey_suspend(pm_message_t state)
2824 {
2825 /* Do these on suspend, we get the events on early resume! */
2826 hotkey_wakeup_reason = TP_ACPI_WAKEUP_NONE;
2827 hotkey_autosleep_ack = 0;
2828 }
2829
2830 static void hotkey_resume(void)
2831 {
2832 tpacpi_disable_brightness_delay();
2833
2834 if (hotkey_mask_get())
2835 printk(TPACPI_ERR
2836 "error while trying to read hot key mask "
2837 "from firmware\n");
2838 tpacpi_send_radiosw_update();
2839 hotkey_tablet_mode_notify_change();
2840 hotkey_wakeup_reason_notify_change();
2841 hotkey_wakeup_hotunplug_complete_notify_change();
2842 hotkey_poll_setup_safe(0);
2843 }
2844
2845 /* procfs -------------------------------------------------------------- */
2846 static int hotkey_read(char *p)
2847 {
2848 int res, status;
2849 int len = 0;
2850
2851 if (!tp_features.hotkey) {
2852 len += sprintf(p + len, "status:\t\tnot supported\n");
2853 return len;
2854 }
2855
2856 if (mutex_lock_killable(&hotkey_mutex))
2857 return -ERESTARTSYS;
2858 res = hotkey_status_get(&status);
2859 if (!res)
2860 res = hotkey_mask_get();
2861 mutex_unlock(&hotkey_mutex);
2862 if (res)
2863 return res;
2864
2865 len += sprintf(p + len, "status:\t\t%s\n", enabled(status, 0));
2866 if (tp_features.hotkey_mask) {
2867 len += sprintf(p + len, "mask:\t\t0x%08x\n", hotkey_mask);
2868 len += sprintf(p + len,
2869 "commands:\tenable, disable, reset, <mask>\n");
2870 } else {
2871 len += sprintf(p + len, "mask:\t\tnot supported\n");
2872 len += sprintf(p + len, "commands:\tenable, disable, reset\n");
2873 }
2874
2875 return len;
2876 }
2877
2878 static int hotkey_write(char *buf)
2879 {
2880 int res, status;
2881 u32 mask;
2882 char *cmd;
2883
2884 if (!tp_features.hotkey)
2885 return -ENODEV;
2886
2887 if (mutex_lock_killable(&hotkey_mutex))
2888 return -ERESTARTSYS;
2889
2890 status = -1;
2891 mask = hotkey_mask;
2892
2893 res = 0;
2894 while ((cmd = next_cmd(&buf))) {
2895 if (strlencmp(cmd, "enable") == 0) {
2896 status = 1;
2897 } else if (strlencmp(cmd, "disable") == 0) {
2898 status = 0;
2899 } else if (strlencmp(cmd, "reset") == 0) {
2900 status = hotkey_orig_status;
2901 mask = hotkey_orig_mask;
2902 } else if (sscanf(cmd, "0x%x", &mask) == 1) {
2903 /* mask set */
2904 } else if (sscanf(cmd, "%x", &mask) == 1) {
2905 /* mask set */
2906 } else {
2907 res = -EINVAL;
2908 goto errexit;
2909 }
2910 }
2911 if (status != -1)
2912 res = hotkey_status_set(status);
2913
2914 if (!res && mask != hotkey_mask)
2915 res = hotkey_mask_set(mask);
2916
2917 errexit:
2918 mutex_unlock(&hotkey_mutex);
2919 return res;
2920 }
2921
2922 static const struct acpi_device_id ibm_htk_device_ids[] = {
2923 {TPACPI_ACPI_HKEY_HID, 0},
2924 {"", 0},
2925 };
2926
2927 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver = {
2928 .hid = ibm_htk_device_ids,
2929 .notify = hotkey_notify,
2930 .handle = &hkey_handle,
2931 .type = ACPI_DEVICE_NOTIFY,
2932 };
2933
2934 static struct ibm_struct hotkey_driver_data = {
2935 .name = "hotkey",
2936 .read = hotkey_read,
2937 .write = hotkey_write,
2938 .exit = hotkey_exit,
2939 .resume = hotkey_resume,
2940 .suspend = hotkey_suspend,
2941 .acpi = &ibm_hotkey_acpidriver,
2942 };
2943
2944 /*************************************************************************
2945 * Bluetooth subdriver
2946 */
2947
2948 enum {
2949 /* ACPI GBDC/SBDC bits */
2950 TP_ACPI_BLUETOOTH_HWPRESENT = 0x01, /* Bluetooth hw available */
2951 TP_ACPI_BLUETOOTH_RADIOSSW = 0x02, /* Bluetooth radio enabled */
2952 TP_ACPI_BLUETOOTH_RESUMECTRL = 0x04, /* Bluetooth state at resume:
2953 off / last state */
2954 };
2955
2956 enum {
2957 /* ACPI \BLTH commands */
2958 TP_ACPI_BLTH_GET_ULTRAPORT_ID = 0x00, /* Get Ultraport BT ID */
2959 TP_ACPI_BLTH_GET_PWR_ON_RESUME = 0x01, /* Get power-on-resume state */
2960 TP_ACPI_BLTH_PWR_ON_ON_RESUME = 0x02, /* Resume powered on */
2961 TP_ACPI_BLTH_PWR_OFF_ON_RESUME = 0x03, /* Resume powered off */
2962 TP_ACPI_BLTH_SAVE_STATE = 0x05, /* Save state for S4/S5 */
2963 };
2964
2965 static struct rfkill *tpacpi_bluetooth_rfkill;
2966
2967 static void bluetooth_suspend(pm_message_t state)
2968 {
2969 /* Try to make sure radio will resume powered off */
2970 acpi_evalf(NULL, NULL, "\\BLTH", "vd",
2971 TP_ACPI_BLTH_PWR_OFF_ON_RESUME);
2972 }
2973
2974 static int bluetooth_get_radiosw(void)
2975 {
2976 int status;
2977
2978 if (!tp_features.bluetooth)
2979 return -ENODEV;
2980
2981 /* WLSW overrides bluetooth in firmware/hardware, reflect that */
2982 if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&status) && !status)
2983 return RFKILL_STATE_HARD_BLOCKED;
2984
2985 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
2986 if (dbg_bluetoothemul)
2987 return (tpacpi_bluetooth_emulstate) ?
2988 RFKILL_STATE_UNBLOCKED : RFKILL_STATE_SOFT_BLOCKED;
2989 #endif
2990
2991 if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
2992 return -EIO;
2993
2994 return ((status & TP_ACPI_BLUETOOTH_RADIOSSW) != 0) ?
2995 RFKILL_STATE_UNBLOCKED : RFKILL_STATE_SOFT_BLOCKED;
2996 }
2997
2998 static void bluetooth_update_rfk(void)
2999 {
3000 int status;
3001
3002 if (!tpacpi_bluetooth_rfkill)
3003 return;
3004
3005 status = bluetooth_get_radiosw();
3006 if (status < 0)
3007 return;
3008 rfkill_force_state(tpacpi_bluetooth_rfkill, status);
3009 }
3010
3011 static int bluetooth_set_radiosw(int radio_on, int update_rfk)
3012 {
3013 int status;
3014
3015 if (!tp_features.bluetooth)
3016 return -ENODEV;
3017
3018 /* WLSW overrides bluetooth in firmware/hardware, but there is no
3019 * reason to risk weird behaviour. */
3020 if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&status) && !status
3021 && radio_on)
3022 return -EPERM;
3023
3024 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3025 if (dbg_bluetoothemul) {
3026 tpacpi_bluetooth_emulstate = !!radio_on;
3027 if (update_rfk)
3028 bluetooth_update_rfk();
3029 return 0;
3030 }
3031 #endif
3032
3033 /* We make sure to keep TP_ACPI_BLUETOOTH_RESUMECTRL off */
3034 if (radio_on)
3035 status = TP_ACPI_BLUETOOTH_RADIOSSW;
3036 else
3037 status = 0;
3038 if (!acpi_evalf(hkey_handle, NULL, "SBDC", "vd", status))
3039 return -EIO;
3040
3041 if (update_rfk)
3042 bluetooth_update_rfk();
3043
3044 return 0;
3045 }
3046
3047 /* sysfs bluetooth enable ---------------------------------------------- */
3048 static ssize_t bluetooth_enable_show(struct device *dev,
3049 struct device_attribute *attr,
3050 char *buf)
3051 {
3052 int status;
3053
3054 status = bluetooth_get_radiosw();
3055 if (status < 0)
3056 return status;
3057
3058 return snprintf(buf, PAGE_SIZE, "%d\n",
3059 (status == RFKILL_STATE_UNBLOCKED) ? 1 : 0);
3060 }
3061
3062 static ssize_t bluetooth_enable_store(struct device *dev,
3063 struct device_attribute *attr,
3064 const char *buf, size_t count)
3065 {
3066 unsigned long t;
3067 int res;
3068
3069 if (parse_strtoul(buf, 1, &t))
3070 return -EINVAL;
3071
3072 res = bluetooth_set_radiosw(t, 1);
3073
3074 return (res) ? res : count;
3075 }
3076
3077 static struct device_attribute dev_attr_bluetooth_enable =
3078 __ATTR(bluetooth_enable, S_IWUSR | S_IRUGO,
3079 bluetooth_enable_show, bluetooth_enable_store);
3080
3081 /* --------------------------------------------------------------------- */
3082
3083 static struct attribute *bluetooth_attributes[] = {
3084 &dev_attr_bluetooth_enable.attr,
3085 NULL
3086 };
3087
3088 static const struct attribute_group bluetooth_attr_group = {
3089 .attrs = bluetooth_attributes,
3090 };
3091
3092 static int tpacpi_bluetooth_rfk_get(void *data, enum rfkill_state *state)
3093 {
3094 int bts = bluetooth_get_radiosw();
3095
3096 if (bts < 0)
3097 return bts;
3098
3099 *state = bts;
3100 return 0;
3101 }
3102
3103 static int tpacpi_bluetooth_rfk_set(void *data, enum rfkill_state state)
3104 {
3105 return bluetooth_set_radiosw((state == RFKILL_STATE_UNBLOCKED), 0);
3106 }
3107
3108 static void bluetooth_shutdown(void)
3109 {
3110 /* Order firmware to save current state to NVRAM */
3111 if (!acpi_evalf(NULL, NULL, "\\BLTH", "vd",
3112 TP_ACPI_BLTH_SAVE_STATE))
3113 printk(TPACPI_NOTICE
3114 "failed to save bluetooth state to NVRAM\n");
3115 }
3116
3117 static void bluetooth_exit(void)
3118 {
3119 bluetooth_shutdown();
3120
3121 if (tpacpi_bluetooth_rfkill)
3122 rfkill_unregister(tpacpi_bluetooth_rfkill);
3123
3124 sysfs_remove_group(&tpacpi_pdev->dev.kobj,
3125 &bluetooth_attr_group);
3126 }
3127
3128 static int __init bluetooth_init(struct ibm_init_struct *iibm)
3129 {
3130 int res;
3131 int status = 0;
3132
3133 vdbg_printk(TPACPI_DBG_INIT, "initializing bluetooth subdriver\n");
3134
3135 TPACPI_ACPIHANDLE_INIT(hkey);
3136
3137 /* bluetooth not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
3138 G4x, R30, R31, R40e, R50e, T20-22, X20-21 */
3139 tp_features.bluetooth = hkey_handle &&
3140 acpi_evalf(hkey_handle, &status, "GBDC", "qd");
3141
3142 vdbg_printk(TPACPI_DBG_INIT, "bluetooth is %s, status 0x%02x\n",
3143 str_supported(tp_features.bluetooth),
3144 status);
3145
3146 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3147 if (dbg_bluetoothemul) {
3148 tp_features.bluetooth = 1;
3149 printk(TPACPI_INFO
3150 "bluetooth switch emulation enabled\n");
3151 } else
3152 #endif
3153 if (tp_features.bluetooth &&
3154 !(status & TP_ACPI_BLUETOOTH_HWPRESENT)) {
3155 /* no bluetooth hardware present in system */
3156 tp_features.bluetooth = 0;
3157 dbg_printk(TPACPI_DBG_INIT,
3158 "bluetooth hardware not installed\n");
3159 }
3160
3161 if (!tp_features.bluetooth)
3162 return 1;
3163
3164 res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
3165 &bluetooth_attr_group);
3166 if (res)
3167 return res;
3168
3169 res = tpacpi_new_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID,
3170 &tpacpi_bluetooth_rfkill,
3171 RFKILL_TYPE_BLUETOOTH,
3172 "tpacpi_bluetooth_sw",
3173 true,
3174 tpacpi_bluetooth_rfk_set,
3175 tpacpi_bluetooth_rfk_get);
3176 if (res) {
3177 bluetooth_exit();
3178 return res;
3179 }
3180
3181 return 0;
3182 }
3183
3184 /* procfs -------------------------------------------------------------- */
3185 static int bluetooth_read(char *p)
3186 {
3187 int len = 0;
3188 int status = bluetooth_get_radiosw();
3189
3190 if (!tp_features.bluetooth)
3191 len += sprintf(p + len, "status:\t\tnot supported\n");
3192 else {
3193 len += sprintf(p + len, "status:\t\t%s\n",
3194 (status == RFKILL_STATE_UNBLOCKED) ?
3195 "enabled" : "disabled");
3196 len += sprintf(p + len, "commands:\tenable, disable\n");
3197 }
3198
3199 return len;
3200 }
3201
3202 static int bluetooth_write(char *buf)
3203 {
3204 char *cmd;
3205
3206 if (!tp_features.bluetooth)
3207 return -ENODEV;
3208
3209 while ((cmd = next_cmd(&buf))) {
3210 if (strlencmp(cmd, "enable") == 0) {
3211 bluetooth_set_radiosw(1, 1);
3212 } else if (strlencmp(cmd, "disable") == 0) {
3213 bluetooth_set_radiosw(0, 1);
3214 } else
3215 return -EINVAL;
3216 }
3217
3218 return 0;
3219 }
3220
3221 static struct ibm_struct bluetooth_driver_data = {
3222 .name = "bluetooth",
3223 .read = bluetooth_read,
3224 .write = bluetooth_write,
3225 .exit = bluetooth_exit,
3226 .suspend = bluetooth_suspend,
3227 .shutdown = bluetooth_shutdown,
3228 };
3229
3230 /*************************************************************************
3231 * Wan subdriver
3232 */
3233
3234 enum {
3235 /* ACPI GWAN/SWAN bits */
3236 TP_ACPI_WANCARD_HWPRESENT = 0x01, /* Wan hw available */
3237 TP_ACPI_WANCARD_RADIOSSW = 0x02, /* Wan radio enabled */
3238 TP_ACPI_WANCARD_RESUMECTRL = 0x04, /* Wan state at resume:
3239 off / last state */
3240 };
3241
3242 static struct rfkill *tpacpi_wan_rfkill;
3243
3244 static void wan_suspend(pm_message_t state)
3245 {
3246 /* Try to make sure radio will resume powered off */
3247 acpi_evalf(NULL, NULL, "\\WGSV", "qvd",
3248 TP_ACPI_WGSV_PWR_OFF_ON_RESUME);
3249 }
3250
3251 static int wan_get_radiosw(void)
3252 {
3253 int status;
3254
3255 if (!tp_features.wan)
3256 return -ENODEV;
3257
3258 /* WLSW overrides WWAN in firmware/hardware, reflect that */
3259 if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&status) && !status)
3260 return RFKILL_STATE_HARD_BLOCKED;
3261
3262 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3263 if (dbg_wwanemul)
3264 return (tpacpi_wwan_emulstate) ?
3265 RFKILL_STATE_UNBLOCKED : RFKILL_STATE_SOFT_BLOCKED;
3266 #endif
3267
3268 if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
3269 return -EIO;
3270
3271 return ((status & TP_ACPI_WANCARD_RADIOSSW) != 0) ?
3272 RFKILL_STATE_UNBLOCKED : RFKILL_STATE_SOFT_BLOCKED;
3273 }
3274
3275 static void wan_update_rfk(void)
3276 {
3277 int status;
3278
3279 if (!tpacpi_wan_rfkill)
3280 return;
3281
3282 status = wan_get_radiosw();
3283 if (status < 0)
3284 return;
3285 rfkill_force_state(tpacpi_wan_rfkill, status);
3286 }
3287
3288 static int wan_set_radiosw(int radio_on, int update_rfk)
3289 {
3290 int status;
3291
3292 if (!tp_features.wan)
3293 return -ENODEV;
3294
3295 /* WLSW overrides bluetooth in firmware/hardware, but there is no
3296 * reason to risk weird behaviour. */
3297 if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&status) && !status
3298 && radio_on)
3299 return -EPERM;
3300
3301 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3302 if (dbg_wwanemul) {
3303 tpacpi_wwan_emulstate = !!radio_on;
3304 if (update_rfk)
3305 wan_update_rfk();
3306 return 0;
3307 }
3308 #endif
3309
3310 /* We make sure to keep TP_ACPI_WANCARD_RESUMECTRL off */
3311 if (radio_on)
3312 status = TP_ACPI_WANCARD_RADIOSSW;
3313 else
3314 status = 0;
3315 if (!acpi_evalf(hkey_handle, NULL, "SWAN", "vd", status))
3316 return -EIO;
3317
3318 if (update_rfk)
3319 wan_update_rfk();
3320
3321 return 0;
3322 }
3323
3324 /* sysfs wan enable ---------------------------------------------------- */
3325 static ssize_t wan_enable_show(struct device *dev,
3326 struct device_attribute *attr,
3327 char *buf)
3328 {
3329 int status;
3330
3331 status = wan_get_radiosw();
3332 if (status < 0)
3333 return status;
3334
3335 return snprintf(buf, PAGE_SIZE, "%d\n",
3336 (status == RFKILL_STATE_UNBLOCKED) ? 1 : 0);
3337 }
3338
3339 static ssize_t wan_enable_store(struct device *dev,
3340 struct device_attribute *attr,
3341 const char *buf, size_t count)
3342 {
3343 unsigned long t;
3344 int res;
3345
3346 if (parse_strtoul(buf, 1, &t))
3347 return -EINVAL;
3348
3349 res = wan_set_radiosw(t, 1);
3350
3351 return (res) ? res : count;
3352 }
3353
3354 static struct device_attribute dev_attr_wan_enable =
3355 __ATTR(wwan_enable, S_IWUSR | S_IRUGO,
3356 wan_enable_show, wan_enable_store);
3357
3358 /* --------------------------------------------------------------------- */
3359
3360 static struct attribute *wan_attributes[] = {
3361 &dev_attr_wan_enable.attr,
3362 NULL
3363 };
3364
3365 static const struct attribute_group wan_attr_group = {
3366 .attrs = wan_attributes,
3367 };
3368
3369 static int tpacpi_wan_rfk_get(void *data, enum rfkill_state *state)
3370 {
3371 int wans = wan_get_radiosw();
3372
3373 if (wans < 0)
3374 return wans;
3375
3376 *state = wans;
3377 return 0;
3378 }
3379
3380 static int tpacpi_wan_rfk_set(void *data, enum rfkill_state state)
3381 {
3382 return wan_set_radiosw((state == RFKILL_STATE_UNBLOCKED), 0);
3383 }
3384
3385 static void wan_shutdown(void)
3386 {
3387 /* Order firmware to save current state to NVRAM */
3388 if (!acpi_evalf(NULL, NULL, "\\WGSV", "vd",
3389 TP_ACPI_WGSV_SAVE_STATE))
3390 printk(TPACPI_NOTICE
3391 "failed to save WWAN state to NVRAM\n");
3392 }
3393
3394 static void wan_exit(void)
3395 {
3396 wan_shutdown();
3397
3398 if (tpacpi_wan_rfkill)
3399 rfkill_unregister(tpacpi_wan_rfkill);
3400
3401 sysfs_remove_group(&tpacpi_pdev->dev.kobj,
3402 &wan_attr_group);
3403 }
3404
3405 static int __init wan_init(struct ibm_init_struct *iibm)
3406 {
3407 int res;
3408 int status = 0;
3409
3410 vdbg_printk(TPACPI_DBG_INIT, "initializing wan subdriver\n");
3411
3412 TPACPI_ACPIHANDLE_INIT(hkey);
3413
3414 tp_features.wan = hkey_handle &&
3415 acpi_evalf(hkey_handle, &status, "GWAN", "qd");
3416
3417 vdbg_printk(TPACPI_DBG_INIT, "wan is %s, status 0x%02x\n",
3418 str_supported(tp_features.wan),
3419 status);
3420
3421 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3422 if (dbg_wwanemul) {
3423 tp_features.wan = 1;
3424 printk(TPACPI_INFO
3425 "wwan switch emulation enabled\n");
3426 } else
3427 #endif
3428 if (tp_features.wan &&
3429 !(status & TP_ACPI_WANCARD_HWPRESENT)) {
3430 /* no wan hardware present in system */
3431 tp_features.wan = 0;
3432 dbg_printk(TPACPI_DBG_INIT,
3433 "wan hardware not installed\n");
3434 }
3435
3436 if (!tp_features.wan)
3437 return 1;
3438
3439 res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
3440 &wan_attr_group);
3441 if (res)
3442 return res;
3443
3444 res = tpacpi_new_rfkill(TPACPI_RFK_WWAN_SW_ID,
3445 &tpacpi_wan_rfkill,
3446 RFKILL_TYPE_WWAN,
3447 "tpacpi_wwan_sw",
3448 true,
3449 tpacpi_wan_rfk_set,
3450 tpacpi_wan_rfk_get);
3451 if (res) {
3452 wan_exit();
3453 return res;
3454 }
3455
3456 return 0;
3457 }
3458
3459 /* procfs -------------------------------------------------------------- */
3460 static int wan_read(char *p)
3461 {
3462 int len = 0;
3463 int status = wan_get_radiosw();
3464
3465 if (!tp_features.wan)
3466 len += sprintf(p + len, "status:\t\tnot supported\n");
3467 else {
3468 len += sprintf(p + len, "status:\t\t%s\n",
3469 (status == RFKILL_STATE_UNBLOCKED) ?
3470 "enabled" : "disabled");
3471 len += sprintf(p + len, "commands:\tenable, disable\n");
3472 }
3473
3474 return len;
3475 }
3476
3477 static int wan_write(char *buf)
3478 {
3479 char *cmd;
3480
3481 if (!tp_features.wan)
3482 return -ENODEV;
3483
3484 while ((cmd = next_cmd(&buf))) {
3485 if (strlencmp(cmd, "enable") == 0) {
3486 wan_set_radiosw(1, 1);
3487 } else if (strlencmp(cmd, "disable") == 0) {
3488 wan_set_radiosw(0, 1);
3489 } else
3490 return -EINVAL;
3491 }
3492
3493 return 0;
3494 }
3495
3496 static struct ibm_struct wan_driver_data = {
3497 .name = "wan",
3498 .read = wan_read,
3499 .write = wan_write,
3500 .exit = wan_exit,
3501 .suspend = wan_suspend,
3502 .shutdown = wan_shutdown,
3503 };
3504
3505 /*************************************************************************
3506 * UWB subdriver
3507 */
3508
3509 enum {
3510 /* ACPI GUWB/SUWB bits */
3511 TP_ACPI_UWB_HWPRESENT = 0x01, /* UWB hw available */
3512 TP_ACPI_UWB_RADIOSSW = 0x02, /* UWB radio enabled */
3513 };
3514
3515 static struct rfkill *tpacpi_uwb_rfkill;
3516
3517 static int uwb_get_radiosw(void)
3518 {
3519 int status;
3520
3521 if (!tp_features.uwb)
3522 return -ENODEV;
3523
3524 /* WLSW overrides UWB in firmware/hardware, reflect that */
3525 if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&status) && !status)
3526 return RFKILL_STATE_HARD_BLOCKED;
3527
3528 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3529 if (dbg_uwbemul)
3530 return (tpacpi_uwb_emulstate) ?
3531 RFKILL_STATE_UNBLOCKED : RFKILL_STATE_SOFT_BLOCKED;
3532 #endif
3533
3534 if (!acpi_evalf(hkey_handle, &status, "GUWB", "d"))
3535 return -EIO;
3536
3537 return ((status & TP_ACPI_UWB_RADIOSSW) != 0) ?
3538 RFKILL_STATE_UNBLOCKED : RFKILL_STATE_SOFT_BLOCKED;
3539 }
3540
3541 static void uwb_update_rfk(void)
3542 {
3543 int status;
3544
3545 if (!tpacpi_uwb_rfkill)
3546 return;
3547
3548 status = uwb_get_radiosw();
3549 if (status < 0)
3550 return;
3551 rfkill_force_state(tpacpi_uwb_rfkill, status);
3552 }
3553
3554 static int uwb_set_radiosw(int radio_on, int update_rfk)
3555 {
3556 int status;
3557
3558 if (!tp_features.uwb)
3559 return -ENODEV;
3560
3561 /* WLSW overrides UWB in firmware/hardware, but there is no
3562 * reason to risk weird behaviour. */
3563 if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&status) && !status
3564 && radio_on)
3565 return -EPERM;
3566
3567 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3568 if (dbg_uwbemul) {
3569 tpacpi_uwb_emulstate = !!radio_on;
3570 if (update_rfk)
3571 uwb_update_rfk();
3572 return 0;
3573 }
3574 #endif
3575
3576 status = (radio_on) ? TP_ACPI_UWB_RADIOSSW : 0;
3577 if (!acpi_evalf(hkey_handle, NULL, "SUWB", "vd", status))
3578 return -EIO;
3579
3580 if (update_rfk)
3581 uwb_update_rfk();
3582
3583 return 0;
3584 }
3585
3586 /* --------------------------------------------------------------------- */
3587
3588 static int tpacpi_uwb_rfk_get(void *data, enum rfkill_state *state)
3589 {
3590 int uwbs = uwb_get_radiosw();
3591
3592 if (uwbs < 0)
3593 return uwbs;
3594
3595 *state = uwbs;
3596 return 0;
3597 }
3598
3599 static int tpacpi_uwb_rfk_set(void *data, enum rfkill_state state)
3600 {
3601 return uwb_set_radiosw((state == RFKILL_STATE_UNBLOCKED), 0);
3602 }
3603
3604 static void uwb_exit(void)
3605 {
3606 if (tpacpi_uwb_rfkill)
3607 rfkill_unregister(tpacpi_uwb_rfkill);
3608 }
3609
3610 static int __init uwb_init(struct ibm_init_struct *iibm)
3611 {
3612 int res;
3613 int status = 0;
3614
3615 vdbg_printk(TPACPI_DBG_INIT, "initializing uwb subdriver\n");
3616
3617 TPACPI_ACPIHANDLE_INIT(hkey);
3618
3619 tp_features.uwb = hkey_handle &&
3620 acpi_evalf(hkey_handle, &status, "GUWB", "qd");
3621
3622 vdbg_printk(TPACPI_DBG_INIT, "uwb is %s, status 0x%02x\n",
3623 str_supported(tp_features.uwb),
3624 status);
3625
3626 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3627 if (dbg_uwbemul) {
3628 tp_features.uwb = 1;
3629 printk(TPACPI_INFO
3630 "uwb switch emulation enabled\n");
3631 } else
3632 #endif
3633 if (tp_features.uwb &&
3634 !(status & TP_ACPI_UWB_HWPRESENT)) {
3635 /* no uwb hardware present in system */
3636 tp_features.uwb = 0;
3637 dbg_printk(TPACPI_DBG_INIT,
3638 "uwb hardware not installed\n");
3639 }
3640
3641 if (!tp_features.uwb)
3642 return 1;
3643
3644 res = tpacpi_new_rfkill(TPACPI_RFK_UWB_SW_ID,
3645 &tpacpi_uwb_rfkill,
3646 RFKILL_TYPE_UWB,
3647 "tpacpi_uwb_sw",
3648 false,
3649 tpacpi_uwb_rfk_set,
3650 tpacpi_uwb_rfk_get);
3651
3652 return res;
3653 }
3654
3655 static struct ibm_struct uwb_driver_data = {
3656 .name = "uwb",
3657 .exit = uwb_exit,
3658 .flags.experimental = 1,
3659 };
3660
3661 /*************************************************************************
3662 * Video subdriver
3663 */
3664
3665 #ifdef CONFIG_THINKPAD_ACPI_VIDEO
3666
3667 enum video_access_mode {
3668 TPACPI_VIDEO_NONE = 0,
3669 TPACPI_VIDEO_570, /* 570 */
3670 TPACPI_VIDEO_770, /* 600e/x, 770e, 770x */
3671 TPACPI_VIDEO_NEW, /* all others */
3672 };
3673
3674 enum { /* video status flags, based on VIDEO_570 */
3675 TP_ACPI_VIDEO_S_LCD = 0x01, /* LCD output enabled */
3676 TP_ACPI_VIDEO_S_CRT = 0x02, /* CRT output enabled */
3677 TP_ACPI_VIDEO_S_DVI = 0x08, /* DVI output enabled */
3678 };
3679
3680 enum { /* TPACPI_VIDEO_570 constants */
3681 TP_ACPI_VIDEO_570_PHSCMD = 0x87, /* unknown magic constant :( */
3682 TP_ACPI_VIDEO_570_PHSMASK = 0x03, /* PHS bits that map to
3683 * video_status_flags */
3684 TP_ACPI_VIDEO_570_PHS2CMD = 0x8b, /* unknown magic constant :( */
3685 TP_ACPI_VIDEO_570_PHS2SET = 0x80, /* unknown magic constant :( */
3686 };
3687
3688 static enum video_access_mode video_supported;
3689 static int video_orig_autosw;
3690
3691 static int video_autosw_get(void);
3692 static int video_autosw_set(int enable);
3693
3694 TPACPI_HANDLE(vid2, root, "\\_SB.PCI0.AGPB.VID"); /* G41 */
3695
3696 static int __init video_init(struct ibm_init_struct *iibm)
3697 {
3698 int ivga;
3699
3700 vdbg_printk(TPACPI_DBG_INIT, "initializing video subdriver\n");
3701
3702 TPACPI_ACPIHANDLE_INIT(vid);
3703 TPACPI_ACPIHANDLE_INIT(vid2);
3704
3705 if (vid2_handle && acpi_evalf(NULL, &ivga, "\\IVGA", "d") && ivga)
3706 /* G41, assume IVGA doesn't change */
3707 vid_handle = vid2_handle;
3708
3709 if (!vid_handle)
3710 /* video switching not supported on R30, R31 */
3711 video_supported = TPACPI_VIDEO_NONE;
3712 else if (acpi_evalf(vid_handle, &video_orig_autosw, "SWIT", "qd"))
3713 /* 570 */
3714 video_supported = TPACPI_VIDEO_570;
3715 else if (acpi_evalf(vid_handle, &video_orig_autosw, "^VADL", "qd"))
3716 /* 600e/x, 770e, 770x */
3717 video_supported = TPACPI_VIDEO_770;
3718 else
3719 /* all others */
3720 video_supported = TPACPI_VIDEO_NEW;
3721
3722 vdbg_printk(TPACPI_DBG_INIT, "video is %s, mode %d\n",
3723 str_supported(video_supported != TPACPI_VIDEO_NONE),
3724 video_supported);
3725
3726 return (video_supported != TPACPI_VIDEO_NONE)? 0 : 1;
3727 }
3728
3729 static void video_exit(void)
3730 {
3731 dbg_printk(TPACPI_DBG_EXIT,
3732 "restoring original video autoswitch mode\n");
3733 if (video_autosw_set(video_orig_autosw))
3734 printk(TPACPI_ERR "error while trying to restore original "
3735 "video autoswitch mode\n");
3736 }
3737
3738 static int video_outputsw_get(void)
3739 {
3740 int status = 0;
3741 int i;
3742
3743 switch (video_supported) {
3744 case TPACPI_VIDEO_570:
3745 if (!acpi_evalf(NULL, &i, "\\_SB.PHS", "dd",
3746 TP_ACPI_VIDEO_570_PHSCMD))
3747 return -EIO;
3748 status = i & TP_ACPI_VIDEO_570_PHSMASK;
3749 break;
3750 case TPACPI_VIDEO_770:
3751 if (!acpi_evalf(NULL, &i, "\\VCDL", "d"))
3752 return -EIO;
3753 if (i)
3754 status |= TP_ACPI_VIDEO_S_LCD;
3755 if (!acpi_evalf(NULL, &i, "\\VCDC", "d"))
3756 return -EIO;
3757 if (i)
3758 status |= TP_ACPI_VIDEO_S_CRT;
3759 break;
3760 case TPACPI_VIDEO_NEW:
3761 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 1) ||
3762 !acpi_evalf(NULL, &i, "\\VCDC", "d"))
3763 return -EIO;
3764 if (i)
3765 status |= TP_ACPI_VIDEO_S_CRT;
3766
3767 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0) ||
3768 !acpi_evalf(NULL, &i, "\\VCDL", "d"))
3769 return -EIO;
3770 if (i)
3771 status |= TP_ACPI_VIDEO_S_LCD;
3772 if (!acpi_evalf(NULL, &i, "\\VCDD", "d"))
3773 return -EIO;
3774 if (i)
3775 status |= TP_ACPI_VIDEO_S_DVI;
3776 break;
3777 default:
3778 return -ENOSYS;
3779 }
3780
3781 return status;
3782 }
3783
3784 static int video_outputsw_set(int status)
3785 {
3786 int autosw;
3787 int res = 0;
3788
3789 switch (video_supported) {
3790 case TPACPI_VIDEO_570:
3791 res = acpi_evalf(NULL, NULL,
3792 "\\_SB.PHS2", "vdd",
3793 TP_ACPI_VIDEO_570_PHS2CMD,
3794 status | TP_ACPI_VIDEO_570_PHS2SET);
3795 break;
3796 case TPACPI_VIDEO_770:
3797 autosw = video_autosw_get();
3798 if (autosw < 0)
3799 return autosw;
3800
3801 res = video_autosw_set(1);
3802 if (res)
3803 return res;
3804 res = acpi_evalf(vid_handle, NULL,
3805 "ASWT", "vdd", status * 0x100, 0);
3806 if (!autosw && video_autosw_set(autosw)) {
3807 printk(TPACPI_ERR
3808 "video auto-switch left enabled due to error\n");
3809 return -EIO;
3810 }
3811 break;
3812 case TPACPI_VIDEO_NEW:
3813 res = acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0x80) &&
3814 acpi_evalf(NULL, NULL, "\\VSDS", "vdd", status, 1);
3815 break;
3816 default:
3817 return -ENOSYS;
3818 }
3819
3820 return (res)? 0 : -EIO;
3821 }
3822
3823 static int video_autosw_get(void)
3824 {
3825 int autosw = 0;
3826
3827 switch (video_supported) {
3828 case TPACPI_VIDEO_570:
3829 if (!acpi_evalf(vid_handle, &autosw, "SWIT", "d"))
3830 return -EIO;
3831 break;
3832 case TPACPI_VIDEO_770:
3833 case TPACPI_VIDEO_NEW:
3834 if (!acpi_evalf(vid_handle, &autosw, "^VDEE", "d"))
3835 return -EIO;
3836 break;
3837 default:
3838 return -ENOSYS;
3839 }
3840
3841 return autosw & 1;
3842 }
3843
3844 static int video_autosw_set(int enable)
3845 {
3846 if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", (enable)? 1 : 0))
3847 return -EIO;
3848 return 0;
3849 }
3850
3851 static int video_outputsw_cycle(void)
3852 {
3853 int autosw = video_autosw_get();
3854 int res;
3855
3856 if (autosw < 0)
3857 return autosw;
3858
3859 switch (video_supported) {
3860 case TPACPI_VIDEO_570:
3861 res = video_autosw_set(1);
3862 if (res)
3863 return res;
3864 res = acpi_evalf(ec_handle, NULL, "_Q16", "v");
3865 break;
3866 case TPACPI_VIDEO_770:
3867 case TPACPI_VIDEO_NEW:
3868 res = video_autosw_set(1);
3869 if (res)
3870 return res;
3871 res = acpi_evalf(vid_handle, NULL, "VSWT", "v");
3872 break;
3873 default:
3874 return -ENOSYS;
3875 }
3876 if (!autosw && video_autosw_set(autosw)) {
3877 printk(TPACPI_ERR
3878 "video auto-switch left enabled due to error\n");
3879 return -EIO;
3880 }
3881
3882 return (res)? 0 : -EIO;
3883 }
3884
3885 static int video_expand_toggle(void)
3886 {
3887 switch (video_supported) {
3888 case TPACPI_VIDEO_570:
3889 return acpi_evalf(ec_handle, NULL, "_Q17", "v")?
3890 0 : -EIO;
3891 case TPACPI_VIDEO_770:
3892 return acpi_evalf(vid_handle, NULL, "VEXP", "v")?
3893 0 : -EIO;
3894 case TPACPI_VIDEO_NEW:
3895 return acpi_evalf(NULL, NULL, "\\VEXP", "v")?
3896 0 : -EIO;
3897 default:
3898 return -ENOSYS;
3899 }
3900 /* not reached */
3901 }
3902
3903 static int video_read(char *p)
3904 {
3905 int status, autosw;
3906 int len = 0;
3907
3908 if (video_supported == TPACPI_VIDEO_NONE) {
3909 len += sprintf(p + len, "status:\t\tnot supported\n");
3910 return len;
3911 }
3912
3913 status = video_outputsw_get();
3914 if (status < 0)
3915 return status;
3916
3917 autosw = video_autosw_get();
3918 if (autosw < 0)
3919 return autosw;
3920
3921 len += sprintf(p + len, "status:\t\tsupported\n");
3922 len += sprintf(p + len, "lcd:\t\t%s\n", enabled(status, 0));
3923 len += sprintf(p + len, "crt:\t\t%s\n", enabled(status, 1));
3924 if (video_supported == TPACPI_VIDEO_NEW)
3925 len += sprintf(p + len, "dvi:\t\t%s\n", enabled(status, 3));
3926 len += sprintf(p + len, "auto:\t\t%s\n", enabled(autosw, 0));
3927 len += sprintf(p + len, "commands:\tlcd_enable, lcd_disable\n");
3928 len += sprintf(p + len, "commands:\tcrt_enable, crt_disable\n");
3929 if (video_supported == TPACPI_VIDEO_NEW)
3930 len += sprintf(p + len, "commands:\tdvi_enable, dvi_disable\n");
3931 len += sprintf(p + len, "commands:\tauto_enable, auto_disable\n");
3932 len += sprintf(p + len, "commands:\tvideo_switch, expand_toggle\n");
3933
3934 return len;
3935 }
3936
3937 static int video_write(char *buf)
3938 {
3939 char *cmd;
3940 int enable, disable, status;
3941 int res;
3942
3943 if (video_supported == TPACPI_VIDEO_NONE)
3944 return -ENODEV;
3945
3946 enable = 0;
3947 disable = 0;
3948
3949 while ((cmd = next_cmd(&buf))) {
3950 if (strlencmp(cmd, "lcd_enable") == 0) {
3951 enable |= TP_ACPI_VIDEO_S_LCD;
3952 } else if (strlencmp(cmd, "lcd_disable") == 0) {
3953 disable |= TP_ACPI_VIDEO_S_LCD;
3954 } else if (strlencmp(cmd, "crt_enable") == 0) {
3955 enable |= TP_ACPI_VIDEO_S_CRT;
3956 } else if (strlencmp(cmd, "crt_disable") == 0) {
3957 disable |= TP_ACPI_VIDEO_S_CRT;
3958 } else if (video_supported == TPACPI_VIDEO_NEW &&
3959 strlencmp(cmd, "dvi_enable") == 0) {
3960 enable |= TP_ACPI_VIDEO_S_DVI;
3961 } else if (video_supported == TPACPI_VIDEO_NEW &&
3962 strlencmp(cmd, "dvi_disable") == 0) {
3963 disable |= TP_ACPI_VIDEO_S_DVI;
3964 } else if (strlencmp(cmd, "auto_enable") == 0) {
3965 res = video_autosw_set(1);
3966 if (res)
3967 return res;
3968 } else if (strlencmp(cmd, "auto_disable") == 0) {
3969 res = video_autosw_set(0);
3970 if (res)
3971 return res;
3972 } else if (strlencmp(cmd, "video_switch") == 0) {
3973 res = video_outputsw_cycle();
3974 if (res)
3975 return res;
3976 } else if (strlencmp(cmd, "expand_toggle") == 0) {
3977 res = video_expand_toggle();
3978 if (res)
3979 return res;
3980 } else
3981 return -EINVAL;
3982 }
3983
3984 if (enable || disable) {
3985 status = video_outputsw_get();
3986 if (status < 0)
3987 return status;
3988 res = video_outputsw_set((status & ~disable) | enable);
3989 if (res)
3990 return res;
3991 }
3992
3993 return 0;
3994 }
3995
3996 static struct ibm_struct video_driver_data = {
3997 .name = "video",
3998 .read = video_read,
3999 .write = video_write,
4000 .exit = video_exit,
4001 };
4002
4003 #endif /* CONFIG_THINKPAD_ACPI_VIDEO */
4004
4005 /*************************************************************************
4006 * Light (thinklight) subdriver
4007 */
4008
4009 TPACPI_HANDLE(lght, root, "\\LGHT"); /* A21e, A2xm/p, T20-22, X20-21 */
4010 TPACPI_HANDLE(ledb, ec, "LEDB"); /* G4x */
4011
4012 static int light_get_status(void)
4013 {
4014 int status = 0;
4015
4016 if (tp_features.light_status) {
4017 if (!acpi_evalf(ec_handle, &status, "KBLT", "d"))
4018 return -EIO;
4019 return (!!status);
4020 }
4021
4022 return -ENXIO;
4023 }
4024
4025 static int light_set_status(int status)
4026 {
4027 int rc;
4028
4029 if (tp_features.light) {
4030 if (cmos_handle) {
4031 rc = acpi_evalf(cmos_handle, NULL, NULL, "vd",
4032 (status)?
4033 TP_CMOS_THINKLIGHT_ON :
4034 TP_CMOS_THINKLIGHT_OFF);
4035 } else {
4036 rc = acpi_evalf(lght_handle, NULL, NULL, "vd",
4037 (status)? 1 : 0);
4038 }
4039 return (rc)? 0 : -EIO;
4040 }
4041
4042 return -ENXIO;
4043 }
4044
4045 static void light_set_status_worker(struct work_struct *work)
4046 {
4047 struct tpacpi_led_classdev *data =
4048 container_of(work, struct tpacpi_led_classdev, work);
4049
4050 if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING))
4051 light_set_status((data->new_brightness != LED_OFF));
4052 }
4053
4054 static void light_sysfs_set(struct led_classdev *led_cdev,
4055 enum led_brightness brightness)
4056 {
4057 struct tpacpi_led_classdev *data =
4058 container_of(led_cdev,
4059 struct tpacpi_led_classdev,
4060 led_classdev);
4061 data->new_brightness = brightness;
4062 queue_work(tpacpi_wq, &data->work);
4063 }
4064
4065 static enum led_brightness light_sysfs_get(struct led_classdev *led_cdev)
4066 {
4067 return (light_get_status() == 1)? LED_FULL : LED_OFF;
4068 }
4069
4070 static struct tpacpi_led_classdev tpacpi_led_thinklight = {
4071 .led_classdev = {
4072 .name = "tpacpi::thinklight",
4073 .brightness_set = &light_sysfs_set,
4074 .brightness_get = &light_sysfs_get,
4075 }
4076 };
4077
4078 static int __init light_init(struct ibm_init_struct *iibm)
4079 {
4080 int rc;
4081
4082 vdbg_printk(TPACPI_DBG_INIT, "initializing light subdriver\n");
4083
4084 TPACPI_ACPIHANDLE_INIT(ledb);
4085 TPACPI_ACPIHANDLE_INIT(lght);
4086 TPACPI_ACPIHANDLE_INIT(cmos);
4087 INIT_WORK(&tpacpi_led_thinklight.work, light_set_status_worker);
4088
4089 /* light not supported on 570, 600e/x, 770e, 770x, G4x, R30, R31 */
4090 tp_features.light = (cmos_handle || lght_handle) && !ledb_handle;
4091
4092 if (tp_features.light)
4093 /* light status not supported on
4094 570, 600e/x, 770e, 770x, G4x, R30, R31, R32, X20 */
4095 tp_features.light_status =
4096 acpi_evalf(ec_handle, NULL, "KBLT", "qv");
4097
4098 vdbg_printk(TPACPI_DBG_INIT, "light is %s, light status is %s\n",
4099 str_supported(tp_features.light),
4100 str_supported(tp_features.light_status));
4101
4102 if (!tp_features.light)
4103 return 1;
4104
4105 rc = led_classdev_register(&tpacpi_pdev->dev,
4106 &tpacpi_led_thinklight.led_classdev);
4107
4108 if (rc < 0) {
4109 tp_features.light = 0;
4110 tp_features.light_status = 0;
4111 } else {
4112 rc = 0;
4113 }
4114
4115 return rc;
4116 }
4117
4118 static void light_exit(void)
4119 {
4120 led_classdev_unregister(&tpacpi_led_thinklight.led_classdev);
4121 if (work_pending(&tpacpi_led_thinklight.work))
4122 flush_workqueue(tpacpi_wq);
4123 }
4124
4125 static int light_read(char *p)
4126 {
4127 int len = 0;
4128 int status;
4129
4130 if (!tp_features.light) {
4131 len += sprintf(p + len, "status:\t\tnot supported\n");
4132 } else if (!tp_features.light_status) {
4133 len += sprintf(p + len, "status:\t\tunknown\n");
4134 len += sprintf(p + len, "commands:\ton, off\n");
4135 } else {
4136 status = light_get_status();
4137 if (status < 0)
4138 return status;
4139 len += sprintf(p + len, "status:\t\t%s\n", onoff(status, 0));
4140 len += sprintf(p + len, "commands:\ton, off\n");
4141 }
4142
4143 return len;
4144 }
4145
4146 static int light_write(char *buf)
4147 {
4148 char *cmd;
4149 int newstatus = 0;
4150
4151 if (!tp_features.light)
4152 return -ENODEV;
4153
4154 while ((cmd = next_cmd(&buf))) {
4155 if (strlencmp(cmd, "on") == 0) {
4156 newstatus = 1;
4157 } else if (strlencmp(cmd, "off") == 0) {
4158 newstatus = 0;
4159 } else
4160 return -EINVAL;
4161 }
4162
4163 return light_set_status(newstatus);
4164 }
4165
4166 static struct ibm_struct light_driver_data = {
4167 .name = "light",
4168 .read = light_read,
4169 .write = light_write,
4170 .exit = light_exit,
4171 };
4172
4173 /*************************************************************************
4174 * Dock subdriver
4175 */
4176
4177 #ifdef CONFIG_THINKPAD_ACPI_DOCK
4178
4179 static void dock_notify(struct ibm_struct *ibm, u32 event);
4180 static int dock_read(char *p);
4181 static int dock_write(char *buf);
4182
4183 TPACPI_HANDLE(dock, root, "\\_SB.GDCK", /* X30, X31, X40 */
4184 "\\_SB.PCI0.DOCK", /* 600e/x,770e,770x,A2xm/p,T20-22,X20-21 */
4185 "\\_SB.PCI0.PCI1.DOCK", /* all others */
4186 "\\_SB.PCI.ISA.SLCE", /* 570 */
4187 ); /* A21e,G4x,R30,R31,R32,R40,R40e,R50e */
4188
4189 /* don't list other alternatives as we install a notify handler on the 570 */
4190 TPACPI_HANDLE(pci, root, "\\_SB.PCI"); /* 570 */
4191
4192 static const struct acpi_device_id ibm_pci_device_ids[] = {
4193 {PCI_ROOT_HID_STRING, 0},
4194 {"", 0},
4195 };
4196
4197 static struct tp_acpi_drv_struct ibm_dock_acpidriver[2] = {
4198 {
4199 .notify = dock_notify,
4200 .handle = &dock_handle,
4201 .type = ACPI_SYSTEM_NOTIFY,
4202 },
4203 {
4204 /* THIS ONE MUST NEVER BE USED FOR DRIVER AUTOLOADING.
4205 * We just use it to get notifications of dock hotplug
4206 * in very old thinkpads */
4207 .hid = ibm_pci_device_ids,
4208 .notify = dock_notify,
4209 .handle = &pci_handle,
4210 .type = ACPI_SYSTEM_NOTIFY,
4211 },
4212 };
4213
4214 static struct ibm_struct dock_driver_data[2] = {
4215 {
4216 .name = "dock",
4217 .read = dock_read,
4218 .write = dock_write,
4219 .acpi = &ibm_dock_acpidriver[0],
4220 },
4221 {
4222 .name = "dock",
4223 .acpi = &ibm_dock_acpidriver[1],
4224 },
4225 };
4226
4227 #define dock_docked() (_sta(dock_handle) & 1)
4228
4229 static int __init dock_init(struct ibm_init_struct *iibm)
4230 {
4231 vdbg_printk(TPACPI_DBG_INIT, "initializing dock subdriver\n");
4232
4233 TPACPI_ACPIHANDLE_INIT(dock);
4234
4235 vdbg_printk(TPACPI_DBG_INIT, "dock is %s\n",
4236 str_supported(dock_handle != NULL));
4237
4238 return (dock_handle)? 0 : 1;
4239 }
4240
4241 static int __init dock_init2(struct ibm_init_struct *iibm)
4242 {
4243 int dock2_needed;
4244
4245 vdbg_printk(TPACPI_DBG_INIT, "initializing dock subdriver part 2\n");
4246
4247 if (dock_driver_data[0].flags.acpi_driver_registered &&
4248 dock_driver_data[0].flags.acpi_notify_installed) {
4249 TPACPI_ACPIHANDLE_INIT(pci);
4250 dock2_needed = (pci_handle != NULL);
4251 vdbg_printk(TPACPI_DBG_INIT,
4252 "dock PCI handler for the TP 570 is %s\n",
4253 str_supported(dock2_needed));
4254 } else {
4255 vdbg_printk(TPACPI_DBG_INIT,
4256 "dock subdriver part 2 not required\n");
4257 dock2_needed = 0;
4258 }
4259
4260 return (dock2_needed)? 0 : 1;
4261 }
4262
4263 static void dock_notify(struct ibm_struct *ibm, u32 event)
4264 {
4265 int docked = dock_docked();
4266 int pci = ibm->acpi->hid && ibm->acpi->device &&
4267 acpi_match_device_ids(ibm->acpi->device, ibm_pci_device_ids);
4268 int data;
4269
4270 if (event == 1 && !pci) /* 570 */
4271 data = 1; /* button */
4272 else if (event == 1 && pci) /* 570 */
4273 data = 3; /* dock */
4274 else if (event == 3 && docked)
4275 data = 1; /* button */
4276 else if (event == 3 && !docked)
4277 data = 2; /* undock */
4278 else if (event == 0 && docked)
4279 data = 3; /* dock */
4280 else {
4281 printk(TPACPI_ERR "unknown dock event %d, status %d\n",
4282 event, _sta(dock_handle));
4283 data = 0; /* unknown */
4284 }
4285 acpi_bus_generate_proc_event(ibm->acpi->device, event, data);
4286 acpi_bus_generate_netlink_event(ibm->acpi->device->pnp.device_class,
4287 dev_name(&ibm->acpi->device->dev),
4288 event, data);
4289 }
4290
4291 static int dock_read(char *p)
4292 {
4293 int len = 0;
4294 int docked = dock_docked();
4295
4296 if (!dock_handle)
4297 len += sprintf(p + len, "status:\t\tnot supported\n");
4298 else if (!docked)
4299 len += sprintf(p + len, "status:\t\tundocked\n");
4300 else {
4301 len += sprintf(p + len, "status:\t\tdocked\n");
4302 len += sprintf(p + len, "commands:\tdock, undock\n");
4303 }
4304
4305 return len;
4306 }
4307
4308 static int dock_write(char *buf)
4309 {
4310 char *cmd;
4311
4312 if (!dock_docked())
4313 return -ENODEV;
4314
4315 while ((cmd = next_cmd(&buf))) {
4316 if (strlencmp(cmd, "undock") == 0) {
4317 if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 0) ||
4318 !acpi_evalf(dock_handle, NULL, "_EJ0", "vd", 1))
4319 return -EIO;
4320 } else if (strlencmp(cmd, "dock") == 0) {
4321 if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 1))
4322 return -EIO;
4323 } else
4324 return -EINVAL;
4325 }
4326
4327 return 0;
4328 }
4329
4330 #endif /* CONFIG_THINKPAD_ACPI_DOCK */
4331
4332 /*************************************************************************
4333 * Bay subdriver
4334 */
4335
4336 #ifdef CONFIG_THINKPAD_ACPI_BAY
4337
4338 TPACPI_HANDLE(bay, root, "\\_SB.PCI.IDE.SECN.MAST", /* 570 */
4339 "\\_SB.PCI0.IDE0.IDES.IDSM", /* 600e/x, 770e, 770x */
4340 "\\_SB.PCI0.SATA.SCND.MSTR", /* T60, X60, Z60 */
4341 "\\_SB.PCI0.IDE0.SCND.MSTR", /* all others */
4342 ); /* A21e, R30, R31 */
4343 TPACPI_HANDLE(bay_ej, bay, "_EJ3", /* 600e/x, A2xm/p, A3x */
4344 "_EJ0", /* all others */
4345 ); /* 570,A21e,G4x,R30,R31,R32,R40e,R50e */
4346 TPACPI_HANDLE(bay2, root, "\\_SB.PCI0.IDE0.PRIM.SLAV", /* A3x, R32 */
4347 "\\_SB.PCI0.IDE0.IDEP.IDPS", /* 600e/x, 770e, 770x */
4348 ); /* all others */
4349 TPACPI_HANDLE(bay2_ej, bay2, "_EJ3", /* 600e/x, 770e, A3x */
4350 "_EJ0", /* 770x */
4351 ); /* all others */
4352
4353 static int __init bay_init(struct ibm_init_struct *iibm)
4354 {
4355 vdbg_printk(TPACPI_DBG_INIT, "initializing bay subdriver\n");
4356
4357 TPACPI_ACPIHANDLE_INIT(bay);
4358 if (bay_handle)
4359 TPACPI_ACPIHANDLE_INIT(bay_ej);
4360 TPACPI_ACPIHANDLE_INIT(bay2);
4361 if (bay2_handle)
4362 TPACPI_ACPIHANDLE_INIT(bay2_ej);
4363
4364 tp_features.bay_status = bay_handle &&
4365 acpi_evalf(bay_handle, NULL, "_STA", "qv");
4366 tp_features.bay_status2 = bay2_handle &&
4367 acpi_evalf(bay2_handle, NULL, "_STA", "qv");
4368
4369 tp_features.bay_eject = bay_handle && bay_ej_handle &&
4370 (strlencmp(bay_ej_path, "_EJ0") == 0 || experimental);
4371 tp_features.bay_eject2 = bay2_handle && bay2_ej_handle &&
4372 (strlencmp(bay2_ej_path, "_EJ0") == 0 || experimental);
4373
4374 vdbg_printk(TPACPI_DBG_INIT,
4375 "bay 1: status %s, eject %s; bay 2: status %s, eject %s\n",
4376 str_supported(tp_features.bay_status),
4377 str_supported(tp_features.bay_eject),
4378 str_supported(tp_features.bay_status2),
4379 str_supported(tp_features.bay_eject2));
4380
4381 return (tp_features.bay_status || tp_features.bay_eject ||
4382 tp_features.bay_status2 || tp_features.bay_eject2)? 0 : 1;
4383 }
4384
4385 static void bay_notify(struct ibm_struct *ibm, u32 event)
4386 {
4387 acpi_bus_generate_proc_event(ibm->acpi->device, event, 0);
4388 acpi_bus_generate_netlink_event(ibm->acpi->device->pnp.device_class,
4389 dev_name(&ibm->acpi->device->dev),
4390 event, 0);
4391 }
4392
4393 #define bay_occupied(b) (_sta(b##_handle) & 1)
4394
4395 static int bay_read(char *p)
4396 {
4397 int len = 0;
4398 int occupied = bay_occupied(bay);
4399 int occupied2 = bay_occupied(bay2);
4400 int eject, eject2;
4401
4402 len += sprintf(p + len, "status:\t\t%s\n",
4403 tp_features.bay_status ?
4404 (occupied ? "occupied" : "unoccupied") :
4405 "not supported");
4406 if (tp_features.bay_status2)
4407 len += sprintf(p + len, "status2:\t%s\n", occupied2 ?
4408 "occupied" : "unoccupied");
4409
4410 eject = tp_features.bay_eject && occupied;
4411 eject2 = tp_features.bay_eject2 && occupied2;
4412
4413 if (eject && eject2)
4414 len += sprintf(p + len, "commands:\teject, eject2\n");
4415 else if (eject)
4416 len += sprintf(p + len, "commands:\teject\n");
4417 else if (eject2)
4418 len += sprintf(p + len, "commands:\teject2\n");
4419
4420 return len;
4421 }
4422
4423 static int bay_write(char *buf)
4424 {
4425 char *cmd;
4426
4427 if (!tp_features.bay_eject && !tp_features.bay_eject2)
4428 return -ENODEV;
4429
4430 while ((cmd = next_cmd(&buf))) {
4431 if (tp_features.bay_eject && strlencmp(cmd, "eject") == 0) {
4432 if (!acpi_evalf(bay_ej_handle, NULL, NULL, "vd", 1))
4433 return -EIO;
4434 } else if (tp_features.bay_eject2 &&
4435 strlencmp(cmd, "eject2") == 0) {
4436 if (!acpi_evalf(bay2_ej_handle, NULL, NULL, "vd", 1))
4437 return -EIO;
4438 } else
4439 return -EINVAL;
4440 }
4441
4442 return 0;
4443 }
4444
4445 static struct tp_acpi_drv_struct ibm_bay_acpidriver = {
4446 .notify = bay_notify,
4447 .handle = &bay_handle,
4448 .type = ACPI_SYSTEM_NOTIFY,
4449 };
4450
4451 static struct ibm_struct bay_driver_data = {
4452 .name = "bay",
4453 .read = bay_read,
4454 .write = bay_write,
4455 .acpi = &ibm_bay_acpidriver,
4456 };
4457
4458 #endif /* CONFIG_THINKPAD_ACPI_BAY */
4459
4460 /*************************************************************************
4461 * CMOS subdriver
4462 */
4463
4464 /* sysfs cmos_command -------------------------------------------------- */
4465 static ssize_t cmos_command_store(struct device *dev,
4466 struct device_attribute *attr,
4467 const char *buf, size_t count)
4468 {
4469 unsigned long cmos_cmd;
4470 int res;
4471
4472 if (parse_strtoul(buf, 21, &cmos_cmd))
4473 return -EINVAL;
4474
4475 res = issue_thinkpad_cmos_command(cmos_cmd);
4476 return (res)? res : count;
4477 }
4478
4479 static struct device_attribute dev_attr_cmos_command =
4480 __ATTR(cmos_command, S_IWUSR, NULL, cmos_command_store);
4481
4482 /* --------------------------------------------------------------------- */
4483
4484 static int __init cmos_init(struct ibm_init_struct *iibm)
4485 {
4486 int res;
4487
4488 vdbg_printk(TPACPI_DBG_INIT,
4489 "initializing cmos commands subdriver\n");
4490
4491 TPACPI_ACPIHANDLE_INIT(cmos);
4492
4493 vdbg_printk(TPACPI_DBG_INIT, "cmos commands are %s\n",
4494 str_supported(cmos_handle != NULL));
4495
4496 res = device_create_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
4497 if (res)
4498 return res;
4499
4500 return (cmos_handle)? 0 : 1;
4501 }
4502
4503 static void cmos_exit(void)
4504 {
4505 device_remove_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
4506 }
4507
4508 static int cmos_read(char *p)
4509 {
4510 int len = 0;
4511
4512 /* cmos not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
4513 R30, R31, T20-22, X20-21 */
4514 if (!cmos_handle)
4515 len += sprintf(p + len, "status:\t\tnot supported\n");
4516 else {
4517 len += sprintf(p + len, "status:\t\tsupported\n");
4518 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-21)\n");
4519 }
4520
4521 return len;
4522 }
4523
4524 static int cmos_write(char *buf)
4525 {
4526 char *cmd;
4527 int cmos_cmd, res;
4528
4529 while ((cmd = next_cmd(&buf))) {
4530 if (sscanf(cmd, "%u", &cmos_cmd) == 1 &&
4531 cmos_cmd >= 0 && cmos_cmd <= 21) {
4532 /* cmos_cmd set */
4533 } else
4534 return -EINVAL;
4535
4536 res = issue_thinkpad_cmos_command(cmos_cmd);
4537 if (res)
4538 return res;
4539 }
4540
4541 return 0;
4542 }
4543
4544 static struct ibm_struct cmos_driver_data = {
4545 .name = "cmos",
4546 .read = cmos_read,
4547 .write = cmos_write,
4548 .exit = cmos_exit,
4549 };
4550
4551 /*************************************************************************
4552 * LED subdriver
4553 */
4554
4555 enum led_access_mode {
4556 TPACPI_LED_NONE = 0,
4557 TPACPI_LED_570, /* 570 */
4558 TPACPI_LED_OLD, /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
4559 TPACPI_LED_NEW, /* all others */
4560 };
4561
4562 enum { /* For TPACPI_LED_OLD */
4563 TPACPI_LED_EC_HLCL = 0x0c, /* EC reg to get led to power on */
4564 TPACPI_LED_EC_HLBL = 0x0d, /* EC reg to blink a lit led */
4565 TPACPI_LED_EC_HLMS = 0x0e, /* EC reg to select led to command */
4566 };
4567
4568 enum led_status_t {
4569 TPACPI_LED_OFF = 0,
4570 TPACPI_LED_ON,
4571 TPACPI_LED_BLINK,
4572 };
4573
4574 static enum led_access_mode led_supported;
4575
4576 TPACPI_HANDLE(led, ec, "SLED", /* 570 */
4577 "SYSL", /* 600e/x, 770e, 770x, A21e, A2xm/p, */
4578 /* T20-22, X20-21 */
4579 "LED", /* all others */
4580 ); /* R30, R31 */
4581
4582 #define TPACPI_LED_NUMLEDS 8
4583 static struct tpacpi_led_classdev *tpacpi_leds;
4584 static enum led_status_t tpacpi_led_state_cache[TPACPI_LED_NUMLEDS];
4585 static const char * const tpacpi_led_names[TPACPI_LED_NUMLEDS] = {
4586 /* there's a limit of 19 chars + NULL before 2.6.26 */
4587 "tpacpi::power",
4588 "tpacpi:orange:batt",
4589 "tpacpi:green:batt",
4590 "tpacpi::dock_active",
4591 "tpacpi::bay_active",
4592 "tpacpi::dock_batt",
4593 "tpacpi::unknown_led",
4594 "tpacpi::standby",
4595 };
4596
4597 static int led_get_status(const unsigned int led)
4598 {
4599 int status;
4600 enum led_status_t led_s;
4601
4602 switch (led_supported) {
4603 case TPACPI_LED_570:
4604 if (!acpi_evalf(ec_handle,
4605 &status, "GLED", "dd", 1 << led))
4606 return -EIO;
4607 led_s = (status == 0)?
4608 TPACPI_LED_OFF :
4609 ((status == 1)?
4610 TPACPI_LED_ON :
4611 TPACPI_LED_BLINK);
4612 tpacpi_led_state_cache[led] = led_s;
4613 return led_s;
4614 default:
4615 return -ENXIO;
4616 }
4617
4618 /* not reached */
4619 }
4620
4621 static int led_set_status(const unsigned int led,
4622 const enum led_status_t ledstatus)
4623 {
4624 /* off, on, blink. Index is led_status_t */
4625 static const unsigned int led_sled_arg1[] = { 0, 1, 3 };
4626 static const unsigned int led_led_arg1[] = { 0, 0x80, 0xc0 };
4627
4628 int rc = 0;
4629
4630 switch (led_supported) {
4631 case TPACPI_LED_570:
4632 /* 570 */
4633 if (led > 7)
4634 return -EINVAL;
4635 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
4636 (1 << led), led_sled_arg1[ledstatus]))
4637 rc = -EIO;
4638 break;
4639 case TPACPI_LED_OLD:
4640 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */
4641 if (led > 7)
4642 return -EINVAL;
4643 rc = ec_write(TPACPI_LED_EC_HLMS, (1 << led));
4644 if (rc >= 0)
4645 rc = ec_write(TPACPI_LED_EC_HLBL,
4646 (ledstatus == TPACPI_LED_BLINK) << led);
4647 if (rc >= 0)
4648 rc = ec_write(TPACPI_LED_EC_HLCL,
4649 (ledstatus != TPACPI_LED_OFF) << led);
4650 break;
4651 case TPACPI_LED_NEW:
4652 /* all others */
4653 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
4654 led, led_led_arg1[ledstatus]))
4655 rc = -EIO;
4656 break;
4657 default:
4658 rc = -ENXIO;
4659 }
4660
4661 if (!rc)
4662 tpacpi_led_state_cache[led] = ledstatus;
4663
4664 return rc;
4665 }
4666
4667 static void led_sysfs_set_status(unsigned int led,
4668 enum led_brightness brightness)
4669 {
4670 led_set_status(led,
4671 (brightness == LED_OFF) ?
4672 TPACPI_LED_OFF :
4673 (tpacpi_led_state_cache[led] == TPACPI_LED_BLINK) ?
4674 TPACPI_LED_BLINK : TPACPI_LED_ON);
4675 }
4676
4677 static void led_set_status_worker(struct work_struct *work)
4678 {
4679 struct tpacpi_led_classdev *data =
4680 container_of(work, struct tpacpi_led_classdev, work);
4681
4682 if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING))
4683 led_sysfs_set_status(data->led, data->new_brightness);
4684 }
4685
4686 static void led_sysfs_set(struct led_classdev *led_cdev,
4687 enum led_brightness brightness)
4688 {
4689 struct tpacpi_led_classdev *data = container_of(led_cdev,
4690 struct tpacpi_led_classdev, led_classdev);
4691
4692 data->new_brightness = brightness;
4693 queue_work(tpacpi_wq, &data->work);
4694 }
4695
4696 static int led_sysfs_blink_set(struct led_classdev *led_cdev,
4697 unsigned long *delay_on, unsigned long *delay_off)
4698 {
4699 struct tpacpi_led_classdev *data = container_of(led_cdev,
4700 struct tpacpi_led_classdev, led_classdev);
4701
4702 /* Can we choose the flash rate? */
4703 if (*delay_on == 0 && *delay_off == 0) {
4704 /* yes. set them to the hardware blink rate (1 Hz) */
4705 *delay_on = 500; /* ms */
4706 *delay_off = 500; /* ms */
4707 } else if ((*delay_on != 500) || (*delay_off != 500))
4708 return -EINVAL;
4709
4710 data->new_brightness = TPACPI_LED_BLINK;
4711 queue_work(tpacpi_wq, &data->work);
4712
4713 return 0;
4714 }
4715
4716 static enum led_brightness led_sysfs_get(struct led_classdev *led_cdev)
4717 {
4718 int rc;
4719
4720 struct tpacpi_led_classdev *data = container_of(led_cdev,
4721 struct tpacpi_led_classdev, led_classdev);
4722
4723 rc = led_get_status(data->led);
4724
4725 if (rc == TPACPI_LED_OFF || rc < 0)
4726 rc = LED_OFF; /* no error handling in led class :( */
4727 else
4728 rc = LED_FULL;
4729
4730 return rc;
4731 }
4732
4733 static void led_exit(void)
4734 {
4735 unsigned int i;
4736
4737 for (i = 0; i < TPACPI_LED_NUMLEDS; i++) {
4738 if (tpacpi_leds[i].led_classdev.name)
4739 led_classdev_unregister(&tpacpi_leds[i].led_classdev);
4740 }
4741
4742 kfree(tpacpi_leds);
4743 }
4744
4745 static int __init led_init(struct ibm_init_struct *iibm)
4746 {
4747 unsigned int i;
4748 int rc;
4749
4750 vdbg_printk(TPACPI_DBG_INIT, "initializing LED subdriver\n");
4751
4752 TPACPI_ACPIHANDLE_INIT(led);
4753
4754 if (!led_handle)
4755 /* led not supported on R30, R31 */
4756 led_supported = TPACPI_LED_NONE;
4757 else if (strlencmp(led_path, "SLED") == 0)
4758 /* 570 */
4759 led_supported = TPACPI_LED_570;
4760 else if (strlencmp(led_path, "SYSL") == 0)
4761 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
4762 led_supported = TPACPI_LED_OLD;
4763 else
4764 /* all others */
4765 led_supported = TPACPI_LED_NEW;
4766
4767 vdbg_printk(TPACPI_DBG_INIT, "LED commands are %s, mode %d\n",
4768 str_supported(led_supported), led_supported);
4769
4770 tpacpi_leds = kzalloc(sizeof(*tpacpi_leds) * TPACPI_LED_NUMLEDS,
4771 GFP_KERNEL);
4772 if (!tpacpi_leds) {
4773 printk(TPACPI_ERR "Out of memory for LED data\n");
4774 return -ENOMEM;
4775 }
4776
4777 for (i = 0; i < TPACPI_LED_NUMLEDS; i++) {
4778 tpacpi_leds[i].led = i;
4779
4780 tpacpi_leds[i].led_classdev.brightness_set = &led_sysfs_set;
4781 tpacpi_leds[i].led_classdev.blink_set = &led_sysfs_blink_set;
4782 if (led_supported == TPACPI_LED_570)
4783 tpacpi_leds[i].led_classdev.brightness_get =
4784 &led_sysfs_get;
4785
4786 tpacpi_leds[i].led_classdev.name = tpacpi_led_names[i];
4787
4788 INIT_WORK(&tpacpi_leds[i].work, led_set_status_worker);
4789
4790 rc = led_classdev_register(&tpacpi_pdev->dev,
4791 &tpacpi_leds[i].led_classdev);
4792 if (rc < 0) {
4793 tpacpi_leds[i].led_classdev.name = NULL;
4794 led_exit();
4795 return rc;
4796 }
4797 }
4798
4799 return (led_supported != TPACPI_LED_NONE)? 0 : 1;
4800 }
4801
4802 #define str_led_status(s) \
4803 ((s) == TPACPI_LED_OFF ? "off" : \
4804 ((s) == TPACPI_LED_ON ? "on" : "blinking"))
4805
4806 static int led_read(char *p)
4807 {
4808 int len = 0;
4809
4810 if (!led_supported) {
4811 len += sprintf(p + len, "status:\t\tnot supported\n");
4812 return len;
4813 }
4814 len += sprintf(p + len, "status:\t\tsupported\n");
4815
4816 if (led_supported == TPACPI_LED_570) {
4817 /* 570 */
4818 int i, status;
4819 for (i = 0; i < 8; i++) {
4820 status = led_get_status(i);
4821 if (status < 0)
4822 return -EIO;
4823 len += sprintf(p + len, "%d:\t\t%s\n",
4824 i, str_led_status(status));
4825 }
4826 }
4827
4828 len += sprintf(p + len, "commands:\t"
4829 "<led> on, <led> off, <led> blink (<led> is 0-7)\n");
4830
4831 return len;
4832 }
4833
4834 static int led_write(char *buf)
4835 {
4836 char *cmd;
4837 int led, rc;
4838 enum led_status_t s;
4839
4840 if (!led_supported)
4841 return -ENODEV;
4842
4843 while ((cmd = next_cmd(&buf))) {
4844 if (sscanf(cmd, "%d", &led) != 1 || led < 0 || led > 7)
4845 return -EINVAL;
4846
4847 if (strstr(cmd, "off")) {
4848 s = TPACPI_LED_OFF;
4849 } else if (strstr(cmd, "on")) {
4850 s = TPACPI_LED_ON;
4851 } else if (strstr(cmd, "blink")) {
4852 s = TPACPI_LED_BLINK;
4853 } else {
4854 return -EINVAL;
4855 }
4856
4857 rc = led_set_status(led, s);
4858 if (rc < 0)
4859 return rc;
4860 }
4861
4862 return 0;
4863 }
4864
4865 static struct ibm_struct led_driver_data = {
4866 .name = "led",
4867 .read = led_read,
4868 .write = led_write,
4869 .exit = led_exit,
4870 };
4871
4872 /*************************************************************************
4873 * Beep subdriver
4874 */
4875
4876 TPACPI_HANDLE(beep, ec, "BEEP"); /* all except R30, R31 */
4877
4878 static int __init beep_init(struct ibm_init_struct *iibm)
4879 {
4880 vdbg_printk(TPACPI_DBG_INIT, "initializing beep subdriver\n");
4881
4882 TPACPI_ACPIHANDLE_INIT(beep);
4883
4884 vdbg_printk(TPACPI_DBG_INIT, "beep is %s\n",
4885 str_supported(beep_handle != NULL));
4886
4887 return (beep_handle)? 0 : 1;
4888 }
4889
4890 static int beep_read(char *p)
4891 {
4892 int len = 0;
4893
4894 if (!beep_handle)
4895 len += sprintf(p + len, "status:\t\tnot supported\n");
4896 else {
4897 len += sprintf(p + len, "status:\t\tsupported\n");
4898 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-17)\n");
4899 }
4900
4901 return len;
4902 }
4903
4904 static int beep_write(char *buf)
4905 {
4906 char *cmd;
4907 int beep_cmd;
4908
4909 if (!beep_handle)
4910 return -ENODEV;
4911
4912 while ((cmd = next_cmd(&buf))) {
4913 if (sscanf(cmd, "%u", &beep_cmd) == 1 &&
4914 beep_cmd >= 0 && beep_cmd <= 17) {
4915 /* beep_cmd set */
4916 } else
4917 return -EINVAL;
4918 if (!acpi_evalf(beep_handle, NULL, NULL, "vdd", beep_cmd, 0))
4919 return -EIO;
4920 }
4921
4922 return 0;
4923 }
4924
4925 static struct ibm_struct beep_driver_data = {
4926 .name = "beep",
4927 .read = beep_read,
4928 .write = beep_write,
4929 };
4930
4931 /*************************************************************************
4932 * Thermal subdriver
4933 */
4934
4935 enum thermal_access_mode {
4936 TPACPI_THERMAL_NONE = 0, /* No thermal support */
4937 TPACPI_THERMAL_ACPI_TMP07, /* Use ACPI TMP0-7 */
4938 TPACPI_THERMAL_ACPI_UPDT, /* Use ACPI TMP0-7 with UPDT */
4939 TPACPI_THERMAL_TPEC_8, /* Use ACPI EC regs, 8 sensors */
4940 TPACPI_THERMAL_TPEC_16, /* Use ACPI EC regs, 16 sensors */
4941 };
4942
4943 enum { /* TPACPI_THERMAL_TPEC_* */
4944 TP_EC_THERMAL_TMP0 = 0x78, /* ACPI EC regs TMP 0..7 */
4945 TP_EC_THERMAL_TMP8 = 0xC0, /* ACPI EC regs TMP 8..15 */
4946 TP_EC_THERMAL_TMP_NA = -128, /* ACPI EC sensor not available */
4947 };
4948
4949 #define TPACPI_MAX_THERMAL_SENSORS 16 /* Max thermal sensors supported */
4950 struct ibm_thermal_sensors_struct {
4951 s32 temp[TPACPI_MAX_THERMAL_SENSORS];
4952 };
4953
4954 static enum thermal_access_mode thermal_read_mode;
4955
4956 /* idx is zero-based */
4957 static int thermal_get_sensor(int idx, s32 *value)
4958 {
4959 int t;
4960 s8 tmp;
4961 char tmpi[5];
4962
4963 t = TP_EC_THERMAL_TMP0;
4964
4965 switch (thermal_read_mode) {
4966 #if TPACPI_MAX_THERMAL_SENSORS >= 16
4967 case TPACPI_THERMAL_TPEC_16:
4968 if (idx >= 8 && idx <= 15) {
4969 t = TP_EC_THERMAL_TMP8;
4970 idx -= 8;
4971 }
4972 /* fallthrough */
4973 #endif
4974 case TPACPI_THERMAL_TPEC_8:
4975 if (idx <= 7) {
4976 if (!acpi_ec_read(t + idx, &tmp))
4977 return -EIO;
4978 *value = tmp * 1000;
4979 return 0;
4980 }
4981 break;
4982
4983 case TPACPI_THERMAL_ACPI_UPDT:
4984 if (idx <= 7) {
4985 snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
4986 if (!acpi_evalf(ec_handle, NULL, "UPDT", "v"))
4987 return -EIO;
4988 if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
4989 return -EIO;
4990 *value = (t - 2732) * 100;
4991 return 0;
4992 }
4993 break;
4994
4995 case TPACPI_THERMAL_ACPI_TMP07:
4996 if (idx <= 7) {
4997 snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
4998 if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
4999 return -EIO;
5000 if (t > 127 || t < -127)
5001 t = TP_EC_THERMAL_TMP_NA;
5002 *value = t * 1000;
5003 return 0;
5004 }
5005 break;
5006
5007 case TPACPI_THERMAL_NONE:
5008 default:
5009 return -ENOSYS;
5010 }
5011
5012 return -EINVAL;
5013 }
5014
5015 static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s)
5016 {
5017 int res, i;
5018 int n;
5019
5020 n = 8;
5021 i = 0;
5022
5023 if (!s)
5024 return -EINVAL;
5025
5026 if (thermal_read_mode == TPACPI_THERMAL_TPEC_16)
5027 n = 16;
5028
5029 for (i = 0 ; i < n; i++) {
5030 res = thermal_get_sensor(i, &s->temp[i]);
5031 if (res)
5032 return res;
5033 }
5034
5035 return n;
5036 }
5037
5038 /* sysfs temp##_input -------------------------------------------------- */
5039
5040 static ssize_t thermal_temp_input_show(struct device *dev,
5041 struct device_attribute *attr,
5042 char *buf)
5043 {
5044 struct sensor_device_attribute *sensor_attr =
5045 to_sensor_dev_attr(attr);
5046 int idx = sensor_attr->index;
5047 s32 value;
5048 int res;
5049
5050 res = thermal_get_sensor(idx, &value);
5051 if (res)
5052 return res;
5053 if (value == TP_EC_THERMAL_TMP_NA * 1000)
5054 return -ENXIO;
5055
5056 return snprintf(buf, PAGE_SIZE, "%d\n", value);
5057 }
5058
5059 #define THERMAL_SENSOR_ATTR_TEMP(_idxA, _idxB) \
5060 SENSOR_ATTR(temp##_idxA##_input, S_IRUGO, \
5061 thermal_temp_input_show, NULL, _idxB)
5062
5063 static struct sensor_device_attribute sensor_dev_attr_thermal_temp_input[] = {
5064 THERMAL_SENSOR_ATTR_TEMP(1, 0),
5065 THERMAL_SENSOR_ATTR_TEMP(2, 1),
5066 THERMAL_SENSOR_ATTR_TEMP(3, 2),
5067 THERMAL_SENSOR_ATTR_TEMP(4, 3),
5068 THERMAL_SENSOR_ATTR_TEMP(5, 4),
5069 THERMAL_SENSOR_ATTR_TEMP(6, 5),
5070 THERMAL_SENSOR_ATTR_TEMP(7, 6),
5071 THERMAL_SENSOR_ATTR_TEMP(8, 7),
5072 THERMAL_SENSOR_ATTR_TEMP(9, 8),
5073 THERMAL_SENSOR_ATTR_TEMP(10, 9),
5074 THERMAL_SENSOR_ATTR_TEMP(11, 10),
5075 THERMAL_SENSOR_ATTR_TEMP(12, 11),
5076 THERMAL_SENSOR_ATTR_TEMP(13, 12),
5077 THERMAL_SENSOR_ATTR_TEMP(14, 13),
5078 THERMAL_SENSOR_ATTR_TEMP(15, 14),
5079 THERMAL_SENSOR_ATTR_TEMP(16, 15),
5080 };
5081
5082 #define THERMAL_ATTRS(X) \
5083 &sensor_dev_attr_thermal_temp_input[X].dev_attr.attr
5084
5085 static struct attribute *thermal_temp_input_attr[] = {
5086 THERMAL_ATTRS(8),
5087 THERMAL_ATTRS(9),
5088 THERMAL_ATTRS(10),
5089 THERMAL_ATTRS(11),
5090 THERMAL_ATTRS(12),
5091 THERMAL_ATTRS(13),
5092 THERMAL_ATTRS(14),
5093 THERMAL_ATTRS(15),
5094 THERMAL_ATTRS(0),
5095 THERMAL_ATTRS(1),
5096 THERMAL_ATTRS(2),
5097 THERMAL_ATTRS(3),
5098 THERMAL_ATTRS(4),
5099 THERMAL_ATTRS(5),
5100 THERMAL_ATTRS(6),
5101 THERMAL_ATTRS(7),
5102 NULL
5103 };
5104
5105 static const struct attribute_group thermal_temp_input16_group = {
5106 .attrs = thermal_temp_input_attr
5107 };
5108
5109 static const struct attribute_group thermal_temp_input8_group = {
5110 .attrs = &thermal_temp_input_attr[8]
5111 };
5112
5113 #undef THERMAL_SENSOR_ATTR_TEMP
5114 #undef THERMAL_ATTRS
5115
5116 /* --------------------------------------------------------------------- */
5117
5118 static int __init thermal_init(struct ibm_init_struct *iibm)
5119 {
5120 u8 t, ta1, ta2;
5121 int i;
5122 int acpi_tmp7;
5123 int res;
5124
5125 vdbg_printk(TPACPI_DBG_INIT, "initializing thermal subdriver\n");
5126
5127 acpi_tmp7 = acpi_evalf(ec_handle, NULL, "TMP7", "qv");
5128
5129 if (thinkpad_id.ec_model) {
5130 /*
5131 * Direct EC access mode: sensors at registers
5132 * 0x78-0x7F, 0xC0-0xC7. Registers return 0x00 for
5133 * non-implemented, thermal sensors return 0x80 when
5134 * not available
5135 */
5136
5137 ta1 = ta2 = 0;
5138 for (i = 0; i < 8; i++) {
5139 if (acpi_ec_read(TP_EC_THERMAL_TMP0 + i, &t)) {
5140 ta1 |= t;
5141 } else {
5142 ta1 = 0;
5143 break;
5144 }
5145 if (acpi_ec_read(TP_EC_THERMAL_TMP8 + i, &t)) {
5146 ta2 |= t;
5147 } else {
5148 ta1 = 0;
5149 break;
5150 }
5151 }
5152 if (ta1 == 0) {
5153 /* This is sheer paranoia, but we handle it anyway */
5154 if (acpi_tmp7) {
5155 printk(TPACPI_ERR
5156 "ThinkPad ACPI EC access misbehaving, "
5157 "falling back to ACPI TMPx access "
5158 "mode\n");
5159 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
5160 } else {
5161 printk(TPACPI_ERR
5162 "ThinkPad ACPI EC access misbehaving, "
5163 "disabling thermal sensors access\n");
5164 thermal_read_mode = TPACPI_THERMAL_NONE;
5165 }
5166 } else {
5167 thermal_read_mode =
5168 (ta2 != 0) ?
5169 TPACPI_THERMAL_TPEC_16 : TPACPI_THERMAL_TPEC_8;
5170 }
5171 } else if (acpi_tmp7) {
5172 if (acpi_evalf(ec_handle, NULL, "UPDT", "qv")) {
5173 /* 600e/x, 770e, 770x */
5174 thermal_read_mode = TPACPI_THERMAL_ACPI_UPDT;
5175 } else {
5176 /* Standard ACPI TMPx access, max 8 sensors */
5177 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
5178 }
5179 } else {
5180 /* temperatures not supported on 570, G4x, R30, R31, R32 */
5181 thermal_read_mode = TPACPI_THERMAL_NONE;
5182 }
5183
5184 vdbg_printk(TPACPI_DBG_INIT, "thermal is %s, mode %d\n",
5185 str_supported(thermal_read_mode != TPACPI_THERMAL_NONE),
5186 thermal_read_mode);
5187
5188 switch (thermal_read_mode) {
5189 case TPACPI_THERMAL_TPEC_16:
5190 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
5191 &thermal_temp_input16_group);
5192 if (res)
5193 return res;
5194 break;
5195 case TPACPI_THERMAL_TPEC_8:
5196 case TPACPI_THERMAL_ACPI_TMP07:
5197 case TPACPI_THERMAL_ACPI_UPDT:
5198 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
5199 &thermal_temp_input8_group);
5200 if (res)
5201 return res;
5202 break;
5203 case TPACPI_THERMAL_NONE:
5204 default:
5205 return 1;
5206 }
5207
5208 return 0;
5209 }
5210
5211 static void thermal_exit(void)
5212 {
5213 switch (thermal_read_mode) {
5214 case TPACPI_THERMAL_TPEC_16:
5215 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
5216 &thermal_temp_input16_group);
5217 break;
5218 case TPACPI_THERMAL_TPEC_8:
5219 case TPACPI_THERMAL_ACPI_TMP07:
5220 case TPACPI_THERMAL_ACPI_UPDT:
5221 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
5222 &thermal_temp_input16_group);
5223 break;
5224 case TPACPI_THERMAL_NONE:
5225 default:
5226 break;
5227 }
5228 }
5229
5230 static int thermal_read(char *p)
5231 {
5232 int len = 0;
5233 int n, i;
5234 struct ibm_thermal_sensors_struct t;
5235
5236 n = thermal_get_sensors(&t);
5237 if (unlikely(n < 0))
5238 return n;
5239
5240 len += sprintf(p + len, "temperatures:\t");
5241
5242 if (n > 0) {
5243 for (i = 0; i < (n - 1); i++)
5244 len += sprintf(p + len, "%d ", t.temp[i] / 1000);
5245 len += sprintf(p + len, "%d\n", t.temp[i] / 1000);
5246 } else
5247 len += sprintf(p + len, "not supported\n");
5248
5249 return len;
5250 }
5251
5252 static struct ibm_struct thermal_driver_data = {
5253 .name = "thermal",
5254 .read = thermal_read,
5255 .exit = thermal_exit,
5256 };
5257
5258 /*************************************************************************
5259 * EC Dump subdriver
5260 */
5261
5262 static u8 ecdump_regs[256];
5263
5264 static int ecdump_read(char *p)
5265 {
5266 int len = 0;
5267 int i, j;
5268 u8 v;
5269
5270 len += sprintf(p + len, "EC "
5271 " +00 +01 +02 +03 +04 +05 +06 +07"
5272 " +08 +09 +0a +0b +0c +0d +0e +0f\n");
5273 for (i = 0; i < 256; i += 16) {
5274 len += sprintf(p + len, "EC 0x%02x:", i);
5275 for (j = 0; j < 16; j++) {
5276 if (!acpi_ec_read(i + j, &v))
5277 break;
5278 if (v != ecdump_regs[i + j])
5279 len += sprintf(p + len, " *%02x", v);
5280 else
5281 len += sprintf(p + len, " %02x", v);
5282 ecdump_regs[i + j] = v;
5283 }
5284 len += sprintf(p + len, "\n");
5285 if (j != 16)
5286 break;
5287 }
5288
5289 /* These are way too dangerous to advertise openly... */
5290 #if 0
5291 len += sprintf(p + len, "commands:\t0x<offset> 0x<value>"
5292 " (<offset> is 00-ff, <value> is 00-ff)\n");
5293 len += sprintf(p + len, "commands:\t0x<offset> <value> "
5294 " (<offset> is 00-ff, <value> is 0-255)\n");
5295 #endif
5296 return len;
5297 }
5298
5299 static int ecdump_write(char *buf)
5300 {
5301 char *cmd;
5302 int i, v;
5303
5304 while ((cmd = next_cmd(&buf))) {
5305 if (sscanf(cmd, "0x%x 0x%x", &i, &v) == 2) {
5306 /* i and v set */
5307 } else if (sscanf(cmd, "0x%x %u", &i, &v) == 2) {
5308 /* i and v set */
5309 } else
5310 return -EINVAL;
5311 if (i >= 0 && i < 256 && v >= 0 && v < 256) {
5312 if (!acpi_ec_write(i, v))
5313 return -EIO;
5314 } else
5315 return -EINVAL;
5316 }
5317
5318 return 0;
5319 }
5320
5321 static struct ibm_struct ecdump_driver_data = {
5322 .name = "ecdump",
5323 .read = ecdump_read,
5324 .write = ecdump_write,
5325 .flags.experimental = 1,
5326 };
5327
5328 /*************************************************************************
5329 * Backlight/brightness subdriver
5330 */
5331
5332 #define TPACPI_BACKLIGHT_DEV_NAME "thinkpad_screen"
5333
5334 enum {
5335 TP_EC_BACKLIGHT = 0x31,
5336
5337 /* TP_EC_BACKLIGHT bitmasks */
5338 TP_EC_BACKLIGHT_LVLMSK = 0x1F,
5339 TP_EC_BACKLIGHT_CMDMSK = 0xE0,
5340 TP_EC_BACKLIGHT_MAPSW = 0x20,
5341 };
5342
5343 static struct backlight_device *ibm_backlight_device;
5344 static int brightness_mode;
5345 static unsigned int brightness_enable = 2; /* 2 = auto, 0 = no, 1 = yes */
5346
5347 static struct mutex brightness_mutex;
5348
5349 /*
5350 * ThinkPads can read brightness from two places: EC 0x31, or
5351 * CMOS NVRAM byte 0x5E, bits 0-3.
5352 *
5353 * EC 0x31 has the following layout
5354 * Bit 7: unknown function
5355 * Bit 6: unknown function
5356 * Bit 5: Z: honour scale changes, NZ: ignore scale changes
5357 * Bit 4: must be set to zero to avoid problems
5358 * Bit 3-0: backlight brightness level
5359 *
5360 * brightness_get_raw returns status data in the EC 0x31 layout
5361 */
5362 static int brightness_get_raw(int *status)
5363 {
5364 u8 lec = 0, lcmos = 0, level = 0;
5365
5366 if (brightness_mode & 1) {
5367 if (!acpi_ec_read(TP_EC_BACKLIGHT, &lec))
5368 return -EIO;
5369 level = lec & TP_EC_BACKLIGHT_LVLMSK;
5370 };
5371 if (brightness_mode & 2) {
5372 lcmos = (nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS)
5373 & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
5374 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
5375 lcmos &= (tp_features.bright_16levels)? 0x0f : 0x07;
5376 level = lcmos;
5377 }
5378
5379 if (brightness_mode == 3) {
5380 *status = lec; /* Prefer EC, CMOS is just a backing store */
5381 lec &= TP_EC_BACKLIGHT_LVLMSK;
5382 if (lec == lcmos)
5383 tp_warned.bright_cmos_ec_unsync = 0;
5384 else {
5385 if (!tp_warned.bright_cmos_ec_unsync) {
5386 printk(TPACPI_ERR
5387 "CMOS NVRAM (%u) and EC (%u) do not "
5388 "agree on display brightness level\n",
5389 (unsigned int) lcmos,
5390 (unsigned int) lec);
5391 tp_warned.bright_cmos_ec_unsync = 1;
5392 }
5393 return -EIO;
5394 }
5395 } else {
5396 *status = level;
5397 }
5398
5399 return 0;
5400 }
5401
5402 /* May return EINTR which can always be mapped to ERESTARTSYS */
5403 static int brightness_set(int value)
5404 {
5405 int cmos_cmd, inc, i, res;
5406 int current_value;
5407 int command_bits;
5408
5409 if (value > ((tp_features.bright_16levels)? 15 : 7) ||
5410 value < 0)
5411 return -EINVAL;
5412
5413 res = mutex_lock_killable(&brightness_mutex);
5414 if (res < 0)
5415 return res;
5416
5417 res = brightness_get_raw(&current_value);
5418 if (res < 0)
5419 goto errout;
5420
5421 command_bits = current_value & TP_EC_BACKLIGHT_CMDMSK;
5422 current_value &= TP_EC_BACKLIGHT_LVLMSK;
5423
5424 cmos_cmd = value > current_value ?
5425 TP_CMOS_BRIGHTNESS_UP :
5426 TP_CMOS_BRIGHTNESS_DOWN;
5427 inc = (value > current_value)? 1 : -1;
5428
5429 res = 0;
5430 for (i = current_value; i != value; i += inc) {
5431 if ((brightness_mode & 2) &&
5432 issue_thinkpad_cmos_command(cmos_cmd)) {
5433 res = -EIO;
5434 goto errout;
5435 }
5436 if ((brightness_mode & 1) &&
5437 !acpi_ec_write(TP_EC_BACKLIGHT,
5438 (i + inc) | command_bits)) {
5439 res = -EIO;
5440 goto errout;;
5441 }
5442 }
5443
5444 errout:
5445 mutex_unlock(&brightness_mutex);
5446 return res;
5447 }
5448
5449 /* sysfs backlight class ----------------------------------------------- */
5450
5451 static int brightness_update_status(struct backlight_device *bd)
5452 {
5453 /* it is the backlight class's job (caller) to handle
5454 * EINTR and other errors properly */
5455 return brightness_set(
5456 (bd->props.fb_blank == FB_BLANK_UNBLANK &&
5457 bd->props.power == FB_BLANK_UNBLANK) ?
5458 bd->props.brightness : 0);
5459 }
5460
5461 static int brightness_get(struct backlight_device *bd)
5462 {
5463 int status, res;
5464
5465 res = brightness_get_raw(&status);
5466 if (res < 0)
5467 return 0; /* FIXME: teach backlight about error handling */
5468
5469 return status & TP_EC_BACKLIGHT_LVLMSK;
5470 }
5471
5472 static struct backlight_ops ibm_backlight_data = {
5473 .get_brightness = brightness_get,
5474 .update_status = brightness_update_status,
5475 };
5476
5477 /* --------------------------------------------------------------------- */
5478
5479 static int __init brightness_init(struct ibm_init_struct *iibm)
5480 {
5481 int b;
5482
5483 vdbg_printk(TPACPI_DBG_INIT, "initializing brightness subdriver\n");
5484
5485 mutex_init(&brightness_mutex);
5486
5487 /*
5488 * We always attempt to detect acpi support, so as to switch
5489 * Lenovo Vista BIOS to ACPI brightness mode even if we are not
5490 * going to publish a backlight interface
5491 */
5492 b = tpacpi_check_std_acpi_brightness_support();
5493 if (b > 0) {
5494
5495 if (acpi_video_backlight_support()) {
5496 if (brightness_enable > 1) {
5497 printk(TPACPI_NOTICE
5498 "Standard ACPI backlight interface "
5499 "available, not loading native one.\n");
5500 return 1;
5501 } else if (brightness_enable == 1) {
5502 printk(TPACPI_NOTICE
5503 "Backlight control force enabled, even if standard "
5504 "ACPI backlight interface is available\n");
5505 }
5506 } else {
5507 if (brightness_enable > 1) {
5508 printk(TPACPI_NOTICE
5509 "Standard ACPI backlight interface not "
5510 "available, thinkpad_acpi native "
5511 "brightness control enabled\n");
5512 }
5513 }
5514 }
5515
5516 if (!brightness_enable) {
5517 dbg_printk(TPACPI_DBG_INIT,
5518 "brightness support disabled by "
5519 "module parameter\n");
5520 return 1;
5521 }
5522
5523 if (b > 16) {
5524 printk(TPACPI_ERR
5525 "Unsupported brightness interface, "
5526 "please contact %s\n", TPACPI_MAIL);
5527 return 1;
5528 }
5529 if (b == 16)
5530 tp_features.bright_16levels = 1;
5531
5532 if (!brightness_mode) {
5533 if (thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO)
5534 brightness_mode = 2;
5535 else
5536 brightness_mode = 3;
5537
5538 dbg_printk(TPACPI_DBG_INIT, "selected brightness_mode=%d\n",
5539 brightness_mode);
5540 }
5541
5542 if (brightness_mode > 3)
5543 return -EINVAL;
5544
5545 if (brightness_get_raw(&b) < 0)
5546 return 1;
5547
5548 if (tp_features.bright_16levels)
5549 printk(TPACPI_INFO
5550 "detected a 16-level brightness capable ThinkPad\n");
5551
5552 ibm_backlight_device = backlight_device_register(
5553 TPACPI_BACKLIGHT_DEV_NAME, NULL, NULL,
5554 &ibm_backlight_data);
5555 if (IS_ERR(ibm_backlight_device)) {
5556 printk(TPACPI_ERR "Could not register backlight device\n");
5557 return PTR_ERR(ibm_backlight_device);
5558 }
5559 vdbg_printk(TPACPI_DBG_INIT, "brightness is supported\n");
5560
5561 ibm_backlight_device->props.max_brightness =
5562 (tp_features.bright_16levels)? 15 : 7;
5563 ibm_backlight_device->props.brightness = b & TP_EC_BACKLIGHT_LVLMSK;
5564 backlight_update_status(ibm_backlight_device);
5565
5566 return 0;
5567 }
5568
5569 static void brightness_exit(void)
5570 {
5571 if (ibm_backlight_device) {
5572 vdbg_printk(TPACPI_DBG_EXIT,
5573 "calling backlight_device_unregister()\n");
5574 backlight_device_unregister(ibm_backlight_device);
5575 }
5576 }
5577
5578 static int brightness_read(char *p)
5579 {
5580 int len = 0;
5581 int level;
5582
5583 level = brightness_get(NULL);
5584 if (level < 0) {
5585 len += sprintf(p + len, "level:\t\tunreadable\n");
5586 } else {
5587 len += sprintf(p + len, "level:\t\t%d\n", level);
5588 len += sprintf(p + len, "commands:\tup, down\n");
5589 len += sprintf(p + len, "commands:\tlevel <level>"
5590 " (<level> is 0-%d)\n",
5591 (tp_features.bright_16levels) ? 15 : 7);
5592 }
5593
5594 return len;
5595 }
5596
5597 static int brightness_write(char *buf)
5598 {
5599 int level;
5600 int rc;
5601 char *cmd;
5602 int max_level = (tp_features.bright_16levels) ? 15 : 7;
5603
5604 level = brightness_get(NULL);
5605 if (level < 0)
5606 return level;
5607
5608 while ((cmd = next_cmd(&buf))) {
5609 if (strlencmp(cmd, "up") == 0) {
5610 if (level < max_level)
5611 level++;
5612 } else if (strlencmp(cmd, "down") == 0) {
5613 if (level > 0)
5614 level--;
5615 } else if (sscanf(cmd, "level %d", &level) == 1 &&
5616 level >= 0 && level <= max_level) {
5617 /* new level set */
5618 } else
5619 return -EINVAL;
5620 }
5621
5622 /*
5623 * Now we know what the final level should be, so we try to set it.
5624 * Doing it this way makes the syscall restartable in case of EINTR
5625 */
5626 rc = brightness_set(level);
5627 return (rc == -EINTR)? ERESTARTSYS : rc;
5628 }
5629
5630 static struct ibm_struct brightness_driver_data = {
5631 .name = "brightness",
5632 .read = brightness_read,
5633 .write = brightness_write,
5634 .exit = brightness_exit,
5635 };
5636
5637 /*************************************************************************
5638 * Volume subdriver
5639 */
5640
5641 static int volume_offset = 0x30;
5642
5643 static int volume_read(char *p)
5644 {
5645 int len = 0;
5646 u8 level;
5647
5648 if (!acpi_ec_read(volume_offset, &level)) {
5649 len += sprintf(p + len, "level:\t\tunreadable\n");
5650 } else {
5651 len += sprintf(p + len, "level:\t\t%d\n", level & 0xf);
5652 len += sprintf(p + len, "mute:\t\t%s\n", onoff(level, 6));
5653 len += sprintf(p + len, "commands:\tup, down, mute\n");
5654 len += sprintf(p + len, "commands:\tlevel <level>"
5655 " (<level> is 0-15)\n");
5656 }
5657
5658 return len;
5659 }
5660
5661 static int volume_write(char *buf)
5662 {
5663 int cmos_cmd, inc, i;
5664 u8 level, mute;
5665 int new_level, new_mute;
5666 char *cmd;
5667
5668 while ((cmd = next_cmd(&buf))) {
5669 if (!acpi_ec_read(volume_offset, &level))
5670 return -EIO;
5671 new_mute = mute = level & 0x40;
5672 new_level = level = level & 0xf;
5673
5674 if (strlencmp(cmd, "up") == 0) {
5675 if (mute)
5676 new_mute = 0;
5677 else
5678 new_level = level == 15 ? 15 : level + 1;
5679 } else if (strlencmp(cmd, "down") == 0) {
5680 if (mute)
5681 new_mute = 0;
5682 else
5683 new_level = level == 0 ? 0 : level - 1;
5684 } else if (sscanf(cmd, "level %d", &new_level) == 1 &&
5685 new_level >= 0 && new_level <= 15) {
5686 /* new_level set */
5687 } else if (strlencmp(cmd, "mute") == 0) {
5688 new_mute = 0x40;
5689 } else
5690 return -EINVAL;
5691
5692 if (new_level != level) {
5693 /* mute doesn't change */
5694
5695 cmos_cmd = (new_level > level) ?
5696 TP_CMOS_VOLUME_UP : TP_CMOS_VOLUME_DOWN;
5697 inc = new_level > level ? 1 : -1;
5698
5699 if (mute && (issue_thinkpad_cmos_command(cmos_cmd) ||
5700 !acpi_ec_write(volume_offset, level)))
5701 return -EIO;
5702
5703 for (i = level; i != new_level; i += inc)
5704 if (issue_thinkpad_cmos_command(cmos_cmd) ||
5705 !acpi_ec_write(volume_offset, i + inc))
5706 return -EIO;
5707
5708 if (mute &&
5709 (issue_thinkpad_cmos_command(TP_CMOS_VOLUME_MUTE) ||
5710 !acpi_ec_write(volume_offset, new_level + mute))) {
5711 return -EIO;
5712 }
5713 }
5714
5715 if (new_mute != mute) {
5716 /* level doesn't change */
5717
5718 cmos_cmd = (new_mute) ?
5719 TP_CMOS_VOLUME_MUTE : TP_CMOS_VOLUME_UP;
5720
5721 if (issue_thinkpad_cmos_command(cmos_cmd) ||
5722 !acpi_ec_write(volume_offset, level + new_mute))
5723 return -EIO;
5724 }
5725 }
5726
5727 return 0;
5728 }
5729
5730 static struct ibm_struct volume_driver_data = {
5731 .name = "volume",
5732 .read = volume_read,
5733 .write = volume_write,
5734 };
5735
5736 /*************************************************************************
5737 * Fan subdriver
5738 */
5739
5740 /*
5741 * FAN ACCESS MODES
5742 *
5743 * TPACPI_FAN_RD_ACPI_GFAN:
5744 * ACPI GFAN method: returns fan level
5745 *
5746 * see TPACPI_FAN_WR_ACPI_SFAN
5747 * EC 0x2f (HFSP) not available if GFAN exists
5748 *
5749 * TPACPI_FAN_WR_ACPI_SFAN:
5750 * ACPI SFAN method: sets fan level, 0 (stop) to 7 (max)
5751 *
5752 * EC 0x2f (HFSP) might be available *for reading*, but do not use
5753 * it for writing.
5754 *
5755 * TPACPI_FAN_WR_TPEC:
5756 * ThinkPad EC register 0x2f (HFSP): fan control loop mode
5757 * Supported on almost all ThinkPads
5758 *
5759 * Fan speed changes of any sort (including those caused by the
5760 * disengaged mode) are usually done slowly by the firmware as the
5761 * maximum ammount of fan duty cycle change per second seems to be
5762 * limited.
5763 *
5764 * Reading is not available if GFAN exists.
5765 * Writing is not available if SFAN exists.
5766 *
5767 * Bits
5768 * 7 automatic mode engaged;
5769 * (default operation mode of the ThinkPad)
5770 * fan level is ignored in this mode.
5771 * 6 full speed mode (takes precedence over bit 7);
5772 * not available on all thinkpads. May disable
5773 * the tachometer while the fan controller ramps up
5774 * the speed (which can take up to a few *minutes*).
5775 * Speeds up fan to 100% duty-cycle, which is far above
5776 * the standard RPM levels. It is not impossible that
5777 * it could cause hardware damage.
5778 * 5-3 unused in some models. Extra bits for fan level
5779 * in others, but still useless as all values above
5780 * 7 map to the same speed as level 7 in these models.
5781 * 2-0 fan level (0..7 usually)
5782 * 0x00 = stop
5783 * 0x07 = max (set when temperatures critical)
5784 * Some ThinkPads may have other levels, see
5785 * TPACPI_FAN_WR_ACPI_FANS (X31/X40/X41)
5786 *
5787 * FIRMWARE BUG: on some models, EC 0x2f might not be initialized at
5788 * boot. Apparently the EC does not intialize it, so unless ACPI DSDT
5789 * does so, its initial value is meaningless (0x07).
5790 *
5791 * For firmware bugs, refer to:
5792 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
5793 *
5794 * ----
5795 *
5796 * ThinkPad EC register 0x84 (LSB), 0x85 (MSB):
5797 * Main fan tachometer reading (in RPM)
5798 *
5799 * This register is present on all ThinkPads with a new-style EC, and
5800 * it is known not to be present on the A21m/e, and T22, as there is
5801 * something else in offset 0x84 according to the ACPI DSDT. Other
5802 * ThinkPads from this same time period (and earlier) probably lack the
5803 * tachometer as well.
5804 *
5805 * Unfortunately a lot of ThinkPads with new-style ECs but whose firwmare
5806 * was never fixed by IBM to report the EC firmware version string
5807 * probably support the tachometer (like the early X models), so
5808 * detecting it is quite hard. We need more data to know for sure.
5809 *
5810 * FIRMWARE BUG: always read 0x84 first, otherwise incorrect readings
5811 * might result.
5812 *
5813 * FIRMWARE BUG: may go stale while the EC is switching to full speed
5814 * mode.
5815 *
5816 * For firmware bugs, refer to:
5817 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
5818 *
5819 * TPACPI_FAN_WR_ACPI_FANS:
5820 * ThinkPad X31, X40, X41. Not available in the X60.
5821 *
5822 * FANS ACPI handle: takes three arguments: low speed, medium speed,
5823 * high speed. ACPI DSDT seems to map these three speeds to levels
5824 * as follows: STOP LOW LOW MED MED HIGH HIGH HIGH HIGH
5825 * (this map is stored on FAN0..FAN8 as "0,1,1,2,2,3,3,3,3")
5826 *
5827 * The speeds are stored on handles
5828 * (FANA:FAN9), (FANC:FANB), (FANE:FAND).
5829 *
5830 * There are three default speed sets, acessible as handles:
5831 * FS1L,FS1M,FS1H; FS2L,FS2M,FS2H; FS3L,FS3M,FS3H
5832 *
5833 * ACPI DSDT switches which set is in use depending on various
5834 * factors.
5835 *
5836 * TPACPI_FAN_WR_TPEC is also available and should be used to
5837 * command the fan. The X31/X40/X41 seems to have 8 fan levels,
5838 * but the ACPI tables just mention level 7.
5839 */
5840
5841 enum { /* Fan control constants */
5842 fan_status_offset = 0x2f, /* EC register 0x2f */
5843 fan_rpm_offset = 0x84, /* EC register 0x84: LSB, 0x85 MSB (RPM)
5844 * 0x84 must be read before 0x85 */
5845
5846 TP_EC_FAN_FULLSPEED = 0x40, /* EC fan mode: full speed */
5847 TP_EC_FAN_AUTO = 0x80, /* EC fan mode: auto fan control */
5848
5849 TPACPI_FAN_LAST_LEVEL = 0x100, /* Use cached last-seen fan level */
5850 };
5851
5852 enum fan_status_access_mode {
5853 TPACPI_FAN_NONE = 0, /* No fan status or control */
5854 TPACPI_FAN_RD_ACPI_GFAN, /* Use ACPI GFAN */
5855 TPACPI_FAN_RD_TPEC, /* Use ACPI EC regs 0x2f, 0x84-0x85 */
5856 };
5857
5858 enum fan_control_access_mode {
5859 TPACPI_FAN_WR_NONE = 0, /* No fan control */
5860 TPACPI_FAN_WR_ACPI_SFAN, /* Use ACPI SFAN */
5861 TPACPI_FAN_WR_TPEC, /* Use ACPI EC reg 0x2f */
5862 TPACPI_FAN_WR_ACPI_FANS, /* Use ACPI FANS and EC reg 0x2f */
5863 };
5864
5865 enum fan_control_commands {
5866 TPACPI_FAN_CMD_SPEED = 0x0001, /* speed command */
5867 TPACPI_FAN_CMD_LEVEL = 0x0002, /* level command */
5868 TPACPI_FAN_CMD_ENABLE = 0x0004, /* enable/disable cmd,
5869 * and also watchdog cmd */
5870 };
5871
5872 static int fan_control_allowed;
5873
5874 static enum fan_status_access_mode fan_status_access_mode;
5875 static enum fan_control_access_mode fan_control_access_mode;
5876 static enum fan_control_commands fan_control_commands;
5877
5878 static u8 fan_control_initial_status;
5879 static u8 fan_control_desired_level;
5880 static u8 fan_control_resume_level;
5881 static int fan_watchdog_maxinterval;
5882
5883 static struct mutex fan_mutex;
5884
5885 static void fan_watchdog_fire(struct work_struct *ignored);
5886 static DECLARE_DELAYED_WORK(fan_watchdog_task, fan_watchdog_fire);
5887
5888 TPACPI_HANDLE(fans, ec, "FANS"); /* X31, X40, X41 */
5889 TPACPI_HANDLE(gfan, ec, "GFAN", /* 570 */
5890 "\\FSPD", /* 600e/x, 770e, 770x */
5891 ); /* all others */
5892 TPACPI_HANDLE(sfan, ec, "SFAN", /* 570 */
5893 "JFNS", /* 770x-JL */
5894 ); /* all others */
5895
5896 /*
5897 * Call with fan_mutex held
5898 */
5899 static void fan_update_desired_level(u8 status)
5900 {
5901 if ((status &
5902 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
5903 if (status > 7)
5904 fan_control_desired_level = 7;
5905 else
5906 fan_control_desired_level = status;
5907 }
5908 }
5909
5910 static int fan_get_status(u8 *status)
5911 {
5912 u8 s;
5913
5914 /* TODO:
5915 * Add TPACPI_FAN_RD_ACPI_FANS ? */
5916
5917 switch (fan_status_access_mode) {
5918 case TPACPI_FAN_RD_ACPI_GFAN:
5919 /* 570, 600e/x, 770e, 770x */
5920
5921 if (unlikely(!acpi_evalf(gfan_handle, &s, NULL, "d")))
5922 return -EIO;
5923
5924 if (likely(status))
5925 *status = s & 0x07;
5926
5927 break;
5928
5929 case TPACPI_FAN_RD_TPEC:
5930 /* all except 570, 600e/x, 770e, 770x */
5931 if (unlikely(!acpi_ec_read(fan_status_offset, &s)))
5932 return -EIO;
5933
5934 if (likely(status))
5935 *status = s;
5936
5937 break;
5938
5939 default:
5940 return -ENXIO;
5941 }
5942
5943 return 0;
5944 }
5945
5946 static int fan_get_status_safe(u8 *status)
5947 {
5948 int rc;
5949 u8 s;
5950
5951 if (mutex_lock_killable(&fan_mutex))
5952 return -ERESTARTSYS;
5953 rc = fan_get_status(&s);
5954 if (!rc)
5955 fan_update_desired_level(s);
5956 mutex_unlock(&fan_mutex);
5957
5958 if (status)
5959 *status = s;
5960
5961 return rc;
5962 }
5963
5964 static int fan_get_speed(unsigned int *speed)
5965 {
5966 u8 hi, lo;
5967
5968 switch (fan_status_access_mode) {
5969 case TPACPI_FAN_RD_TPEC:
5970 /* all except 570, 600e/x, 770e, 770x */
5971 if (unlikely(!acpi_ec_read(fan_rpm_offset, &lo) ||
5972 !acpi_ec_read(fan_rpm_offset + 1, &hi)))
5973 return -EIO;
5974
5975 if (likely(speed))
5976 *speed = (hi << 8) | lo;
5977
5978 break;
5979
5980 default:
5981 return -ENXIO;
5982 }
5983
5984 return 0;
5985 }
5986
5987 static int fan_set_level(int level)
5988 {
5989 if (!fan_control_allowed)
5990 return -EPERM;
5991
5992 switch (fan_control_access_mode) {
5993 case TPACPI_FAN_WR_ACPI_SFAN:
5994 if (level >= 0 && level <= 7) {
5995 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", level))
5996 return -EIO;
5997 } else
5998 return -EINVAL;
5999 break;
6000
6001 case TPACPI_FAN_WR_ACPI_FANS:
6002 case TPACPI_FAN_WR_TPEC:
6003 if (!(level & TP_EC_FAN_AUTO) &&
6004 !(level & TP_EC_FAN_FULLSPEED) &&
6005 ((level < 0) || (level > 7)))
6006 return -EINVAL;
6007
6008 /* safety net should the EC not support AUTO
6009 * or FULLSPEED mode bits and just ignore them */
6010 if (level & TP_EC_FAN_FULLSPEED)
6011 level |= 7; /* safety min speed 7 */
6012 else if (level & TP_EC_FAN_AUTO)
6013 level |= 4; /* safety min speed 4 */
6014
6015 if (!acpi_ec_write(fan_status_offset, level))
6016 return -EIO;
6017 else
6018 tp_features.fan_ctrl_status_undef = 0;
6019 break;
6020
6021 default:
6022 return -ENXIO;
6023 }
6024 return 0;
6025 }
6026
6027 static int fan_set_level_safe(int level)
6028 {
6029 int rc;
6030
6031 if (!fan_control_allowed)
6032 return -EPERM;
6033
6034 if (mutex_lock_killable(&fan_mutex))
6035 return -ERESTARTSYS;
6036
6037 if (level == TPACPI_FAN_LAST_LEVEL)
6038 level = fan_control_desired_level;
6039
6040 rc = fan_set_level(level);
6041 if (!rc)
6042 fan_update_desired_level(level);
6043
6044 mutex_unlock(&fan_mutex);
6045 return rc;
6046 }
6047
6048 static int fan_set_enable(void)
6049 {
6050 u8 s;
6051 int rc;
6052
6053 if (!fan_control_allowed)
6054 return -EPERM;
6055
6056 if (mutex_lock_killable(&fan_mutex))
6057 return -ERESTARTSYS;
6058
6059 switch (fan_control_access_mode) {
6060 case TPACPI_FAN_WR_ACPI_FANS:
6061 case TPACPI_FAN_WR_TPEC:
6062 rc = fan_get_status(&s);
6063 if (rc < 0)
6064 break;
6065
6066 /* Don't go out of emergency fan mode */
6067 if (s != 7) {
6068 s &= 0x07;
6069 s |= TP_EC_FAN_AUTO | 4; /* min fan speed 4 */
6070 }
6071
6072 if (!acpi_ec_write(fan_status_offset, s))
6073 rc = -EIO;
6074 else {
6075 tp_features.fan_ctrl_status_undef = 0;
6076 rc = 0;
6077 }
6078 break;
6079
6080 case TPACPI_FAN_WR_ACPI_SFAN:
6081 rc = fan_get_status(&s);
6082 if (rc < 0)
6083 break;
6084
6085 s &= 0x07;
6086
6087 /* Set fan to at least level 4 */
6088 s |= 4;
6089
6090 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", s))
6091 rc = -EIO;
6092 else
6093 rc = 0;
6094 break;
6095
6096 default:
6097 rc = -ENXIO;
6098 }
6099
6100 mutex_unlock(&fan_mutex);
6101 return rc;
6102 }
6103
6104 static int fan_set_disable(void)
6105 {
6106 int rc;
6107
6108 if (!fan_control_allowed)
6109 return -EPERM;
6110
6111 if (mutex_lock_killable(&fan_mutex))
6112 return -ERESTARTSYS;
6113
6114 rc = 0;
6115 switch (fan_control_access_mode) {
6116 case TPACPI_FAN_WR_ACPI_FANS:
6117 case TPACPI_FAN_WR_TPEC:
6118 if (!acpi_ec_write(fan_status_offset, 0x00))
6119 rc = -EIO;
6120 else {
6121 fan_control_desired_level = 0;
6122 tp_features.fan_ctrl_status_undef = 0;
6123 }
6124 break;
6125
6126 case TPACPI_FAN_WR_ACPI_SFAN:
6127 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", 0x00))
6128 rc = -EIO;
6129 else
6130 fan_control_desired_level = 0;
6131 break;
6132
6133 default:
6134 rc = -ENXIO;
6135 }
6136
6137
6138 mutex_unlock(&fan_mutex);
6139 return rc;
6140 }
6141
6142 static int fan_set_speed(int speed)
6143 {
6144 int rc;
6145
6146 if (!fan_control_allowed)
6147 return -EPERM;
6148
6149 if (mutex_lock_killable(&fan_mutex))
6150 return -ERESTARTSYS;
6151
6152 rc = 0;
6153 switch (fan_control_access_mode) {
6154 case TPACPI_FAN_WR_ACPI_FANS:
6155 if (speed >= 0 && speed <= 65535) {
6156 if (!acpi_evalf(fans_handle, NULL, NULL, "vddd",
6157 speed, speed, speed))
6158 rc = -EIO;
6159 } else
6160 rc = -EINVAL;
6161 break;
6162
6163 default:
6164 rc = -ENXIO;
6165 }
6166
6167 mutex_unlock(&fan_mutex);
6168 return rc;
6169 }
6170
6171 static void fan_watchdog_reset(void)
6172 {
6173 static int fan_watchdog_active;
6174
6175 if (fan_control_access_mode == TPACPI_FAN_WR_NONE)
6176 return;
6177
6178 if (fan_watchdog_active)
6179 cancel_delayed_work(&fan_watchdog_task);
6180
6181 if (fan_watchdog_maxinterval > 0 &&
6182 tpacpi_lifecycle != TPACPI_LIFE_EXITING) {
6183 fan_watchdog_active = 1;
6184 if (!queue_delayed_work(tpacpi_wq, &fan_watchdog_task,
6185 msecs_to_jiffies(fan_watchdog_maxinterval
6186 * 1000))) {
6187 printk(TPACPI_ERR
6188 "failed to queue the fan watchdog, "
6189 "watchdog will not trigger\n");
6190 }
6191 } else
6192 fan_watchdog_active = 0;
6193 }
6194
6195 static void fan_watchdog_fire(struct work_struct *ignored)
6196 {
6197 int rc;
6198
6199 if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
6200 return;
6201
6202 printk(TPACPI_NOTICE "fan watchdog: enabling fan\n");
6203 rc = fan_set_enable();
6204 if (rc < 0) {
6205 printk(TPACPI_ERR "fan watchdog: error %d while enabling fan, "
6206 "will try again later...\n", -rc);
6207 /* reschedule for later */
6208 fan_watchdog_reset();
6209 }
6210 }
6211
6212 /*
6213 * SYSFS fan layout: hwmon compatible (device)
6214 *
6215 * pwm*_enable:
6216 * 0: "disengaged" mode
6217 * 1: manual mode
6218 * 2: native EC "auto" mode (recommended, hardware default)
6219 *
6220 * pwm*: set speed in manual mode, ignored otherwise.
6221 * 0 is level 0; 255 is level 7. Intermediate points done with linear
6222 * interpolation.
6223 *
6224 * fan*_input: tachometer reading, RPM
6225 *
6226 *
6227 * SYSFS fan layout: extensions
6228 *
6229 * fan_watchdog (driver):
6230 * fan watchdog interval in seconds, 0 disables (default), max 120
6231 */
6232
6233 /* sysfs fan pwm1_enable ----------------------------------------------- */
6234 static ssize_t fan_pwm1_enable_show(struct device *dev,
6235 struct device_attribute *attr,
6236 char *buf)
6237 {
6238 int res, mode;
6239 u8 status;
6240
6241 res = fan_get_status_safe(&status);
6242 if (res)
6243 return res;
6244
6245 if (unlikely(tp_features.fan_ctrl_status_undef)) {
6246 if (status != fan_control_initial_status) {
6247 tp_features.fan_ctrl_status_undef = 0;
6248 } else {
6249 /* Return most likely status. In fact, it
6250 * might be the only possible status */
6251 status = TP_EC_FAN_AUTO;
6252 }
6253 }
6254
6255 if (status & TP_EC_FAN_FULLSPEED) {
6256 mode = 0;
6257 } else if (status & TP_EC_FAN_AUTO) {
6258 mode = 2;
6259 } else
6260 mode = 1;
6261
6262 return snprintf(buf, PAGE_SIZE, "%d\n", mode);
6263 }
6264
6265 static ssize_t fan_pwm1_enable_store(struct device *dev,
6266 struct device_attribute *attr,
6267 const char *buf, size_t count)
6268 {
6269 unsigned long t;
6270 int res, level;
6271
6272 if (parse_strtoul(buf, 2, &t))
6273 return -EINVAL;
6274
6275 switch (t) {
6276 case 0:
6277 level = TP_EC_FAN_FULLSPEED;
6278 break;
6279 case 1:
6280 level = TPACPI_FAN_LAST_LEVEL;
6281 break;
6282 case 2:
6283 level = TP_EC_FAN_AUTO;
6284 break;
6285 case 3:
6286 /* reserved for software-controlled auto mode */
6287 return -ENOSYS;
6288 default:
6289 return -EINVAL;
6290 }
6291
6292 res = fan_set_level_safe(level);
6293 if (res == -ENXIO)
6294 return -EINVAL;
6295 else if (res < 0)
6296 return res;
6297
6298 fan_watchdog_reset();
6299
6300 return count;
6301 }
6302
6303 static struct device_attribute dev_attr_fan_pwm1_enable =
6304 __ATTR(pwm1_enable, S_IWUSR | S_IRUGO,
6305 fan_pwm1_enable_show, fan_pwm1_enable_store);
6306
6307 /* sysfs fan pwm1 ------------------------------------------------------ */
6308 static ssize_t fan_pwm1_show(struct device *dev,
6309 struct device_attribute *attr,
6310 char *buf)
6311 {
6312 int res;
6313 u8 status;
6314
6315 res = fan_get_status_safe(&status);
6316 if (res)
6317 return res;
6318
6319 if (unlikely(tp_features.fan_ctrl_status_undef)) {
6320 if (status != fan_control_initial_status) {
6321 tp_features.fan_ctrl_status_undef = 0;
6322 } else {
6323 status = TP_EC_FAN_AUTO;
6324 }
6325 }
6326
6327 if ((status &
6328 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) != 0)
6329 status = fan_control_desired_level;
6330
6331 if (status > 7)
6332 status = 7;
6333
6334 return snprintf(buf, PAGE_SIZE, "%u\n", (status * 255) / 7);
6335 }
6336
6337 static ssize_t fan_pwm1_store(struct device *dev,
6338 struct device_attribute *attr,
6339 const char *buf, size_t count)
6340 {
6341 unsigned long s;
6342 int rc;
6343 u8 status, newlevel;
6344
6345 if (parse_strtoul(buf, 255, &s))
6346 return -EINVAL;
6347
6348 /* scale down from 0-255 to 0-7 */
6349 newlevel = (s >> 5) & 0x07;
6350
6351 if (mutex_lock_killable(&fan_mutex))
6352 return -ERESTARTSYS;
6353
6354 rc = fan_get_status(&status);
6355 if (!rc && (status &
6356 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
6357 rc = fan_set_level(newlevel);
6358 if (rc == -ENXIO)
6359 rc = -EINVAL;
6360 else if (!rc) {
6361 fan_update_desired_level(newlevel);
6362 fan_watchdog_reset();
6363 }
6364 }
6365
6366 mutex_unlock(&fan_mutex);
6367 return (rc)? rc : count;
6368 }
6369
6370 static struct device_attribute dev_attr_fan_pwm1 =
6371 __ATTR(pwm1, S_IWUSR | S_IRUGO,
6372 fan_pwm1_show, fan_pwm1_store);
6373
6374 /* sysfs fan fan1_input ------------------------------------------------ */
6375 static ssize_t fan_fan1_input_show(struct device *dev,
6376 struct device_attribute *attr,
6377 char *buf)
6378 {
6379 int res;
6380 unsigned int speed;
6381
6382 res = fan_get_speed(&speed);
6383 if (res < 0)
6384 return res;
6385
6386 return snprintf(buf, PAGE_SIZE, "%u\n", speed);
6387 }
6388
6389 static struct device_attribute dev_attr_fan_fan1_input =
6390 __ATTR(fan1_input, S_IRUGO,
6391 fan_fan1_input_show, NULL);
6392
6393 /* sysfs fan fan_watchdog (hwmon driver) ------------------------------- */
6394 static ssize_t fan_fan_watchdog_show(struct device_driver *drv,
6395 char *buf)
6396 {
6397 return snprintf(buf, PAGE_SIZE, "%u\n", fan_watchdog_maxinterval);
6398 }
6399
6400 static ssize_t fan_fan_watchdog_store(struct device_driver *drv,
6401 const char *buf, size_t count)
6402 {
6403 unsigned long t;
6404
6405 if (parse_strtoul(buf, 120, &t))
6406 return -EINVAL;
6407
6408 if (!fan_control_allowed)
6409 return -EPERM;
6410
6411 fan_watchdog_maxinterval = t;
6412 fan_watchdog_reset();
6413
6414 return count;
6415 }
6416
6417 static DRIVER_ATTR(fan_watchdog, S_IWUSR | S_IRUGO,
6418 fan_fan_watchdog_show, fan_fan_watchdog_store);
6419
6420 /* --------------------------------------------------------------------- */
6421 static struct attribute *fan_attributes[] = {
6422 &dev_attr_fan_pwm1_enable.attr, &dev_attr_fan_pwm1.attr,
6423 &dev_attr_fan_fan1_input.attr,
6424 NULL
6425 };
6426
6427 static const struct attribute_group fan_attr_group = {
6428 .attrs = fan_attributes,
6429 };
6430
6431 static int __init fan_init(struct ibm_init_struct *iibm)
6432 {
6433 int rc;
6434
6435 vdbg_printk(TPACPI_DBG_INIT, "initializing fan subdriver\n");
6436
6437 mutex_init(&fan_mutex);
6438 fan_status_access_mode = TPACPI_FAN_NONE;
6439 fan_control_access_mode = TPACPI_FAN_WR_NONE;
6440 fan_control_commands = 0;
6441 fan_watchdog_maxinterval = 0;
6442 tp_features.fan_ctrl_status_undef = 0;
6443 fan_control_desired_level = 7;
6444
6445 TPACPI_ACPIHANDLE_INIT(fans);
6446 TPACPI_ACPIHANDLE_INIT(gfan);
6447 TPACPI_ACPIHANDLE_INIT(sfan);
6448
6449 if (gfan_handle) {
6450 /* 570, 600e/x, 770e, 770x */
6451 fan_status_access_mode = TPACPI_FAN_RD_ACPI_GFAN;
6452 } else {
6453 /* all other ThinkPads: note that even old-style
6454 * ThinkPad ECs supports the fan control register */
6455 if (likely(acpi_ec_read(fan_status_offset,
6456 &fan_control_initial_status))) {
6457 fan_status_access_mode = TPACPI_FAN_RD_TPEC;
6458
6459 /* In some ThinkPads, neither the EC nor the ACPI
6460 * DSDT initialize the fan status, and it ends up
6461 * being set to 0x07 when it *could* be either
6462 * 0x07 or 0x80.
6463 *
6464 * Enable for TP-1Y (T43), TP-78 (R51e),
6465 * TP-76 (R52), TP-70 (T43, R52), which are known
6466 * to be buggy. */
6467 if (fan_control_initial_status == 0x07) {
6468 switch (thinkpad_id.ec_model) {
6469 case 0x5931: /* TP-1Y */
6470 case 0x3837: /* TP-78 */
6471 case 0x3637: /* TP-76 */
6472 case 0x3037: /* TP-70 */
6473 printk(TPACPI_NOTICE
6474 "fan_init: initial fan status "
6475 "is unknown, assuming it is "
6476 "in auto mode\n");
6477 tp_features.fan_ctrl_status_undef = 1;
6478 ;;
6479 }
6480 }
6481 } else {
6482 printk(TPACPI_ERR
6483 "ThinkPad ACPI EC access misbehaving, "
6484 "fan status and control unavailable\n");
6485 return 1;
6486 }
6487 }
6488
6489 if (sfan_handle) {
6490 /* 570, 770x-JL */
6491 fan_control_access_mode = TPACPI_FAN_WR_ACPI_SFAN;
6492 fan_control_commands |=
6493 TPACPI_FAN_CMD_LEVEL | TPACPI_FAN_CMD_ENABLE;
6494 } else {
6495 if (!gfan_handle) {
6496 /* gfan without sfan means no fan control */
6497 /* all other models implement TP EC 0x2f control */
6498
6499 if (fans_handle) {
6500 /* X31, X40, X41 */
6501 fan_control_access_mode =
6502 TPACPI_FAN_WR_ACPI_FANS;
6503 fan_control_commands |=
6504 TPACPI_FAN_CMD_SPEED |
6505 TPACPI_FAN_CMD_LEVEL |
6506 TPACPI_FAN_CMD_ENABLE;
6507 } else {
6508 fan_control_access_mode = TPACPI_FAN_WR_TPEC;
6509 fan_control_commands |=
6510 TPACPI_FAN_CMD_LEVEL |
6511 TPACPI_FAN_CMD_ENABLE;
6512 }
6513 }
6514 }
6515
6516 vdbg_printk(TPACPI_DBG_INIT, "fan is %s, modes %d, %d\n",
6517 str_supported(fan_status_access_mode != TPACPI_FAN_NONE ||
6518 fan_control_access_mode != TPACPI_FAN_WR_NONE),
6519 fan_status_access_mode, fan_control_access_mode);
6520
6521 /* fan control master switch */
6522 if (!fan_control_allowed) {
6523 fan_control_access_mode = TPACPI_FAN_WR_NONE;
6524 fan_control_commands = 0;
6525 dbg_printk(TPACPI_DBG_INIT,
6526 "fan control features disabled by parameter\n");
6527 }
6528
6529 /* update fan_control_desired_level */
6530 if (fan_status_access_mode != TPACPI_FAN_NONE)
6531 fan_get_status_safe(NULL);
6532
6533 if (fan_status_access_mode != TPACPI_FAN_NONE ||
6534 fan_control_access_mode != TPACPI_FAN_WR_NONE) {
6535 rc = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
6536 &fan_attr_group);
6537 if (rc < 0)
6538 return rc;
6539
6540 rc = driver_create_file(&tpacpi_hwmon_pdriver.driver,
6541 &driver_attr_fan_watchdog);
6542 if (rc < 0) {
6543 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
6544 &fan_attr_group);
6545 return rc;
6546 }
6547 return 0;
6548 } else
6549 return 1;
6550 }
6551
6552 static void fan_exit(void)
6553 {
6554 vdbg_printk(TPACPI_DBG_EXIT,
6555 "cancelling any pending fan watchdog tasks\n");
6556
6557 /* FIXME: can we really do this unconditionally? */
6558 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj, &fan_attr_group);
6559 driver_remove_file(&tpacpi_hwmon_pdriver.driver,
6560 &driver_attr_fan_watchdog);
6561
6562 cancel_delayed_work(&fan_watchdog_task);
6563 flush_workqueue(tpacpi_wq);
6564 }
6565
6566 static void fan_suspend(pm_message_t state)
6567 {
6568 int rc;
6569
6570 if (!fan_control_allowed)
6571 return;
6572
6573 /* Store fan status in cache */
6574 fan_control_resume_level = 0;
6575 rc = fan_get_status_safe(&fan_control_resume_level);
6576 if (rc < 0)
6577 printk(TPACPI_NOTICE
6578 "failed to read fan level for later "
6579 "restore during resume: %d\n", rc);
6580
6581 /* if it is undefined, don't attempt to restore it.
6582 * KEEP THIS LAST */
6583 if (tp_features.fan_ctrl_status_undef)
6584 fan_control_resume_level = 0;
6585 }
6586
6587 static void fan_resume(void)
6588 {
6589 u8 current_level = 7;
6590 bool do_set = false;
6591 int rc;
6592
6593 /* DSDT *always* updates status on resume */
6594 tp_features.fan_ctrl_status_undef = 0;
6595
6596 if (!fan_control_allowed ||
6597 !fan_control_resume_level ||
6598 (fan_get_status_safe(&current_level) < 0))
6599 return;
6600
6601 switch (fan_control_access_mode) {
6602 case TPACPI_FAN_WR_ACPI_SFAN:
6603 /* never decrease fan level */
6604 do_set = (fan_control_resume_level > current_level);
6605 break;
6606 case TPACPI_FAN_WR_ACPI_FANS:
6607 case TPACPI_FAN_WR_TPEC:
6608 /* never decrease fan level, scale is:
6609 * TP_EC_FAN_FULLSPEED > 7 >= TP_EC_FAN_AUTO
6610 *
6611 * We expect the firmware to set either 7 or AUTO, but we
6612 * handle FULLSPEED out of paranoia.
6613 *
6614 * So, we can safely only restore FULLSPEED or 7, anything
6615 * else could slow the fan. Restoring AUTO is useless, at
6616 * best that's exactly what the DSDT already set (it is the
6617 * slower it uses).
6618 *
6619 * Always keep in mind that the DSDT *will* have set the
6620 * fans to what the vendor supposes is the best level. We
6621 * muck with it only to speed the fan up.
6622 */
6623 if (fan_control_resume_level != 7 &&
6624 !(fan_control_resume_level & TP_EC_FAN_FULLSPEED))
6625 return;
6626 else
6627 do_set = !(current_level & TP_EC_FAN_FULLSPEED) &&
6628 (current_level != fan_control_resume_level);
6629 break;
6630 default:
6631 return;
6632 }
6633 if (do_set) {
6634 printk(TPACPI_NOTICE
6635 "restoring fan level to 0x%02x\n",
6636 fan_control_resume_level);
6637 rc = fan_set_level_safe(fan_control_resume_level);
6638 if (rc < 0)
6639 printk(TPACPI_NOTICE
6640 "failed to restore fan level: %d\n", rc);
6641 }
6642 }
6643
6644 static int fan_read(char *p)
6645 {
6646 int len = 0;
6647 int rc;
6648 u8 status;
6649 unsigned int speed = 0;
6650
6651 switch (fan_status_access_mode) {
6652 case TPACPI_FAN_RD_ACPI_GFAN:
6653 /* 570, 600e/x, 770e, 770x */
6654 rc = fan_get_status_safe(&status);
6655 if (rc < 0)
6656 return rc;
6657
6658 len += sprintf(p + len, "status:\t\t%s\n"
6659 "level:\t\t%d\n",
6660 (status != 0) ? "enabled" : "disabled", status);
6661 break;
6662
6663 case TPACPI_FAN_RD_TPEC:
6664 /* all except 570, 600e/x, 770e, 770x */
6665 rc = fan_get_status_safe(&status);
6666 if (rc < 0)
6667 return rc;
6668
6669 if (unlikely(tp_features.fan_ctrl_status_undef)) {
6670 if (status != fan_control_initial_status)
6671 tp_features.fan_ctrl_status_undef = 0;
6672 else
6673 /* Return most likely status. In fact, it
6674 * might be the only possible status */
6675 status = TP_EC_FAN_AUTO;
6676 }
6677
6678 len += sprintf(p + len, "status:\t\t%s\n",
6679 (status != 0) ? "enabled" : "disabled");
6680
6681 rc = fan_get_speed(&speed);
6682 if (rc < 0)
6683 return rc;
6684
6685 len += sprintf(p + len, "speed:\t\t%d\n", speed);
6686
6687 if (status & TP_EC_FAN_FULLSPEED)
6688 /* Disengaged mode takes precedence */
6689 len += sprintf(p + len, "level:\t\tdisengaged\n");
6690 else if (status & TP_EC_FAN_AUTO)
6691 len += sprintf(p + len, "level:\t\tauto\n");
6692 else
6693 len += sprintf(p + len, "level:\t\t%d\n", status);
6694 break;
6695
6696 case TPACPI_FAN_NONE:
6697 default:
6698 len += sprintf(p + len, "status:\t\tnot supported\n");
6699 }
6700
6701 if (fan_control_commands & TPACPI_FAN_CMD_LEVEL) {
6702 len += sprintf(p + len, "commands:\tlevel <level>");
6703
6704 switch (fan_control_access_mode) {
6705 case TPACPI_FAN_WR_ACPI_SFAN:
6706 len += sprintf(p + len, " (<level> is 0-7)\n");
6707 break;
6708
6709 default:
6710 len += sprintf(p + len, " (<level> is 0-7, "
6711 "auto, disengaged, full-speed)\n");
6712 break;
6713 }
6714 }
6715
6716 if (fan_control_commands & TPACPI_FAN_CMD_ENABLE)
6717 len += sprintf(p + len, "commands:\tenable, disable\n"
6718 "commands:\twatchdog <timeout> (<timeout> "
6719 "is 0 (off), 1-120 (seconds))\n");
6720
6721 if (fan_control_commands & TPACPI_FAN_CMD_SPEED)
6722 len += sprintf(p + len, "commands:\tspeed <speed>"
6723 " (<speed> is 0-65535)\n");
6724
6725 return len;
6726 }
6727
6728 static int fan_write_cmd_level(const char *cmd, int *rc)
6729 {
6730 int level;
6731
6732 if (strlencmp(cmd, "level auto") == 0)
6733 level = TP_EC_FAN_AUTO;
6734 else if ((strlencmp(cmd, "level disengaged") == 0) |
6735 (strlencmp(cmd, "level full-speed") == 0))
6736 level = TP_EC_FAN_FULLSPEED;
6737 else if (sscanf(cmd, "level %d", &level) != 1)
6738 return 0;
6739
6740 *rc = fan_set_level_safe(level);
6741 if (*rc == -ENXIO)
6742 printk(TPACPI_ERR "level command accepted for unsupported "
6743 "access mode %d", fan_control_access_mode);
6744
6745 return 1;
6746 }
6747
6748 static int fan_write_cmd_enable(const char *cmd, int *rc)
6749 {
6750 if (strlencmp(cmd, "enable") != 0)
6751 return 0;
6752
6753 *rc = fan_set_enable();
6754 if (*rc == -ENXIO)
6755 printk(TPACPI_ERR "enable command accepted for unsupported "
6756 "access mode %d", fan_control_access_mode);
6757
6758 return 1;
6759 }
6760
6761 static int fan_write_cmd_disable(const char *cmd, int *rc)
6762 {
6763 if (strlencmp(cmd, "disable") != 0)
6764 return 0;
6765
6766 *rc = fan_set_disable();
6767 if (*rc == -ENXIO)
6768 printk(TPACPI_ERR "disable command accepted for unsupported "
6769 "access mode %d", fan_control_access_mode);
6770
6771 return 1;
6772 }
6773
6774 static int fan_write_cmd_speed(const char *cmd, int *rc)
6775 {
6776 int speed;
6777
6778 /* TODO:
6779 * Support speed <low> <medium> <high> ? */
6780
6781 if (sscanf(cmd, "speed %d", &speed) != 1)
6782 return 0;
6783
6784 *rc = fan_set_speed(speed);
6785 if (*rc == -ENXIO)
6786 printk(TPACPI_ERR "speed command accepted for unsupported "
6787 "access mode %d", fan_control_access_mode);
6788
6789 return 1;
6790 }
6791
6792 static int fan_write_cmd_watchdog(const char *cmd, int *rc)
6793 {
6794 int interval;
6795
6796 if (sscanf(cmd, "watchdog %d", &interval) != 1)
6797 return 0;
6798
6799 if (interval < 0 || interval > 120)
6800 *rc = -EINVAL;
6801 else
6802 fan_watchdog_maxinterval = interval;
6803
6804 return 1;
6805 }
6806
6807 static int fan_write(char *buf)
6808 {
6809 char *cmd;
6810 int rc = 0;
6811
6812 while (!rc && (cmd = next_cmd(&buf))) {
6813 if (!((fan_control_commands & TPACPI_FAN_CMD_LEVEL) &&
6814 fan_write_cmd_level(cmd, &rc)) &&
6815 !((fan_control_commands & TPACPI_FAN_CMD_ENABLE) &&
6816 (fan_write_cmd_enable(cmd, &rc) ||
6817 fan_write_cmd_disable(cmd, &rc) ||
6818 fan_write_cmd_watchdog(cmd, &rc))) &&
6819 !((fan_control_commands & TPACPI_FAN_CMD_SPEED) &&
6820 fan_write_cmd_speed(cmd, &rc))
6821 )
6822 rc = -EINVAL;
6823 else if (!rc)
6824 fan_watchdog_reset();
6825 }
6826
6827 return rc;
6828 }
6829
6830 static struct ibm_struct fan_driver_data = {
6831 .name = "fan",
6832 .read = fan_read,
6833 .write = fan_write,
6834 .exit = fan_exit,
6835 .suspend = fan_suspend,
6836 .resume = fan_resume,
6837 };
6838
6839 /****************************************************************************
6840 ****************************************************************************
6841 *
6842 * Infrastructure
6843 *
6844 ****************************************************************************
6845 ****************************************************************************/
6846
6847 /* sysfs name ---------------------------------------------------------- */
6848 static ssize_t thinkpad_acpi_pdev_name_show(struct device *dev,
6849 struct device_attribute *attr,
6850 char *buf)
6851 {
6852 return snprintf(buf, PAGE_SIZE, "%s\n", TPACPI_NAME);
6853 }
6854
6855 static struct device_attribute dev_attr_thinkpad_acpi_pdev_name =
6856 __ATTR(name, S_IRUGO, thinkpad_acpi_pdev_name_show, NULL);
6857
6858 /* --------------------------------------------------------------------- */
6859
6860 /* /proc support */
6861 static struct proc_dir_entry *proc_dir;
6862
6863 /*
6864 * Module and infrastructure proble, init and exit handling
6865 */
6866
6867 static int force_load;
6868
6869 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
6870 static const char * __init str_supported(int is_supported)
6871 {
6872 static char text_unsupported[] __initdata = "not supported";
6873
6874 return (is_supported)? &text_unsupported[4] : &text_unsupported[0];
6875 }
6876 #endif /* CONFIG_THINKPAD_ACPI_DEBUG */
6877
6878 static void ibm_exit(struct ibm_struct *ibm)
6879 {
6880 dbg_printk(TPACPI_DBG_EXIT, "removing %s\n", ibm->name);
6881
6882 list_del_init(&ibm->all_drivers);
6883
6884 if (ibm->flags.acpi_notify_installed) {
6885 dbg_printk(TPACPI_DBG_EXIT,
6886 "%s: acpi_remove_notify_handler\n", ibm->name);
6887 BUG_ON(!ibm->acpi);
6888 acpi_remove_notify_handler(*ibm->acpi->handle,
6889 ibm->acpi->type,
6890 dispatch_acpi_notify);
6891 ibm->flags.acpi_notify_installed = 0;
6892 ibm->flags.acpi_notify_installed = 0;
6893 }
6894
6895 if (ibm->flags.proc_created) {
6896 dbg_printk(TPACPI_DBG_EXIT,
6897 "%s: remove_proc_entry\n", ibm->name);
6898 remove_proc_entry(ibm->name, proc_dir);
6899 ibm->flags.proc_created = 0;
6900 }
6901
6902 if (ibm->flags.acpi_driver_registered) {
6903 dbg_printk(TPACPI_DBG_EXIT,
6904 "%s: acpi_bus_unregister_driver\n", ibm->name);
6905 BUG_ON(!ibm->acpi);
6906 acpi_bus_unregister_driver(ibm->acpi->driver);
6907 kfree(ibm->acpi->driver);
6908 ibm->acpi->driver = NULL;
6909 ibm->flags.acpi_driver_registered = 0;
6910 }
6911
6912 if (ibm->flags.init_called && ibm->exit) {
6913 ibm->exit();
6914 ibm->flags.init_called = 0;
6915 }
6916
6917 dbg_printk(TPACPI_DBG_INIT, "finished removing %s\n", ibm->name);
6918 }
6919
6920 static int __init ibm_init(struct ibm_init_struct *iibm)
6921 {
6922 int ret;
6923 struct ibm_struct *ibm = iibm->data;
6924 struct proc_dir_entry *entry;
6925
6926 BUG_ON(ibm == NULL);
6927
6928 INIT_LIST_HEAD(&ibm->all_drivers);
6929
6930 if (ibm->flags.experimental && !experimental)
6931 return 0;
6932
6933 dbg_printk(TPACPI_DBG_INIT,
6934 "probing for %s\n", ibm->name);
6935
6936 if (iibm->init) {
6937 ret = iibm->init(iibm);
6938 if (ret > 0)
6939 return 0; /* probe failed */
6940 if (ret)
6941 return ret;
6942
6943 ibm->flags.init_called = 1;
6944 }
6945
6946 if (ibm->acpi) {
6947 if (ibm->acpi->hid) {
6948 ret = register_tpacpi_subdriver(ibm);
6949 if (ret)
6950 goto err_out;
6951 }
6952
6953 if (ibm->acpi->notify) {
6954 ret = setup_acpi_notify(ibm);
6955 if (ret == -ENODEV) {
6956 printk(TPACPI_NOTICE "disabling subdriver %s\n",
6957 ibm->name);
6958 ret = 0;
6959 goto err_out;
6960 }
6961 if (ret < 0)
6962 goto err_out;
6963 }
6964 }
6965
6966 dbg_printk(TPACPI_DBG_INIT,
6967 "%s installed\n", ibm->name);
6968
6969 if (ibm->read) {
6970 entry = create_proc_entry(ibm->name,
6971 S_IFREG | S_IRUGO | S_IWUSR,
6972 proc_dir);
6973 if (!entry) {
6974 printk(TPACPI_ERR "unable to create proc entry %s\n",
6975 ibm->name);
6976 ret = -ENODEV;
6977 goto err_out;
6978 }
6979 entry->owner = THIS_MODULE;
6980 entry->data = ibm;
6981 entry->read_proc = &dispatch_procfs_read;
6982 if (ibm->write)
6983 entry->write_proc = &dispatch_procfs_write;
6984 ibm->flags.proc_created = 1;
6985 }
6986
6987 list_add_tail(&ibm->all_drivers, &tpacpi_all_drivers);
6988
6989 return 0;
6990
6991 err_out:
6992 dbg_printk(TPACPI_DBG_INIT,
6993 "%s: at error exit path with result %d\n",
6994 ibm->name, ret);
6995
6996 ibm_exit(ibm);
6997 return (ret < 0)? ret : 0;
6998 }
6999
7000 /* Probing */
7001
7002 /* returns 0 - probe ok, or < 0 - probe error.
7003 * Probe ok doesn't mean thinkpad found.
7004 * On error, kfree() cleanup on tp->* is not performed, caller must do it */
7005 static int __must_check __init get_thinkpad_model_data(
7006 struct thinkpad_id_data *tp)
7007 {
7008 const struct dmi_device *dev = NULL;
7009 char ec_fw_string[18];
7010 char const *s;
7011
7012 if (!tp)
7013 return -EINVAL;
7014
7015 memset(tp, 0, sizeof(*tp));
7016
7017 if (dmi_name_in_vendors("IBM"))
7018 tp->vendor = PCI_VENDOR_ID_IBM;
7019 else if (dmi_name_in_vendors("LENOVO"))
7020 tp->vendor = PCI_VENDOR_ID_LENOVO;
7021 else
7022 return 0;
7023
7024 s = dmi_get_system_info(DMI_BIOS_VERSION);
7025 tp->bios_version_str = kstrdup(s, GFP_KERNEL);
7026 if (s && !tp->bios_version_str)
7027 return -ENOMEM;
7028 if (!tp->bios_version_str)
7029 return 0;
7030 tp->bios_model = tp->bios_version_str[0]
7031 | (tp->bios_version_str[1] << 8);
7032
7033 /*
7034 * ThinkPad T23 or newer, A31 or newer, R50e or newer,
7035 * X32 or newer, all Z series; Some models must have an
7036 * up-to-date BIOS or they will not be detected.
7037 *
7038 * See http://thinkwiki.org/wiki/List_of_DMI_IDs
7039 */
7040 while ((dev = dmi_find_device(DMI_DEV_TYPE_OEM_STRING, NULL, dev))) {
7041 if (sscanf(dev->name,
7042 "IBM ThinkPad Embedded Controller -[%17c",
7043 ec_fw_string) == 1) {
7044 ec_fw_string[sizeof(ec_fw_string) - 1] = 0;
7045 ec_fw_string[strcspn(ec_fw_string, " ]")] = 0;
7046
7047 tp->ec_version_str = kstrdup(ec_fw_string, GFP_KERNEL);
7048 if (!tp->ec_version_str)
7049 return -ENOMEM;
7050 tp->ec_model = ec_fw_string[0]
7051 | (ec_fw_string[1] << 8);
7052 break;
7053 }
7054 }
7055
7056 s = dmi_get_system_info(DMI_PRODUCT_VERSION);
7057 if (s && !strnicmp(s, "ThinkPad", 8)) {
7058 tp->model_str = kstrdup(s, GFP_KERNEL);
7059 if (!tp->model_str)
7060 return -ENOMEM;
7061 }
7062
7063 s = dmi_get_system_info(DMI_PRODUCT_NAME);
7064 tp->nummodel_str = kstrdup(s, GFP_KERNEL);
7065 if (s && !tp->nummodel_str)
7066 return -ENOMEM;
7067
7068 return 0;
7069 }
7070
7071 static int __init probe_for_thinkpad(void)
7072 {
7073 int is_thinkpad;
7074
7075 if (acpi_disabled)
7076 return -ENODEV;
7077
7078 /*
7079 * Non-ancient models have better DMI tagging, but very old models
7080 * don't.
7081 */
7082 is_thinkpad = (thinkpad_id.model_str != NULL);
7083
7084 /* ec is required because many other handles are relative to it */
7085 TPACPI_ACPIHANDLE_INIT(ec);
7086 if (!ec_handle) {
7087 if (is_thinkpad)
7088 printk(TPACPI_ERR
7089 "Not yet supported ThinkPad detected!\n");
7090 return -ENODEV;
7091 }
7092
7093 /*
7094 * Risks a regression on very old machines, but reduces potential
7095 * false positives a damn great deal
7096 */
7097 if (!is_thinkpad)
7098 is_thinkpad = (thinkpad_id.vendor == PCI_VENDOR_ID_IBM);
7099
7100 if (!is_thinkpad && !force_load)
7101 return -ENODEV;
7102
7103 return 0;
7104 }
7105
7106
7107 /* Module init, exit, parameters */
7108
7109 static struct ibm_init_struct ibms_init[] __initdata = {
7110 {
7111 .init = thinkpad_acpi_driver_init,
7112 .data = &thinkpad_acpi_driver_data,
7113 },
7114 {
7115 .init = hotkey_init,
7116 .data = &hotkey_driver_data,
7117 },
7118 {
7119 .init = bluetooth_init,
7120 .data = &bluetooth_driver_data,
7121 },
7122 {
7123 .init = wan_init,
7124 .data = &wan_driver_data,
7125 },
7126 {
7127 .init = uwb_init,
7128 .data = &uwb_driver_data,
7129 },
7130 #ifdef CONFIG_THINKPAD_ACPI_VIDEO
7131 {
7132 .init = video_init,
7133 .data = &video_driver_data,
7134 },
7135 #endif
7136 {
7137 .init = light_init,
7138 .data = &light_driver_data,
7139 },
7140 #ifdef CONFIG_THINKPAD_ACPI_DOCK
7141 {
7142 .init = dock_init,
7143 .data = &dock_driver_data[0],
7144 },
7145 {
7146 .init = dock_init2,
7147 .data = &dock_driver_data[1],
7148 },
7149 #endif
7150 #ifdef CONFIG_THINKPAD_ACPI_BAY
7151 {
7152 .init = bay_init,
7153 .data = &bay_driver_data,
7154 },
7155 #endif
7156 {
7157 .init = cmos_init,
7158 .data = &cmos_driver_data,
7159 },
7160 {
7161 .init = led_init,
7162 .data = &led_driver_data,
7163 },
7164 {
7165 .init = beep_init,
7166 .data = &beep_driver_data,
7167 },
7168 {
7169 .init = thermal_init,
7170 .data = &thermal_driver_data,
7171 },
7172 {
7173 .data = &ecdump_driver_data,
7174 },
7175 {
7176 .init = brightness_init,
7177 .data = &brightness_driver_data,
7178 },
7179 {
7180 .data = &volume_driver_data,
7181 },
7182 {
7183 .init = fan_init,
7184 .data = &fan_driver_data,
7185 },
7186 };
7187
7188 static int __init set_ibm_param(const char *val, struct kernel_param *kp)
7189 {
7190 unsigned int i;
7191 struct ibm_struct *ibm;
7192
7193 if (!kp || !kp->name || !val)
7194 return -EINVAL;
7195
7196 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
7197 ibm = ibms_init[i].data;
7198 WARN_ON(ibm == NULL);
7199
7200 if (!ibm || !ibm->name)
7201 continue;
7202
7203 if (strcmp(ibm->name, kp->name) == 0 && ibm->write) {
7204 if (strlen(val) > sizeof(ibms_init[i].param) - 2)
7205 return -ENOSPC;
7206 strcpy(ibms_init[i].param, val);
7207 strcat(ibms_init[i].param, ",");
7208 return 0;
7209 }
7210 }
7211
7212 return -EINVAL;
7213 }
7214
7215 module_param(experimental, int, 0);
7216 MODULE_PARM_DESC(experimental,
7217 "Enables experimental features when non-zero");
7218
7219 module_param_named(debug, dbg_level, uint, 0);
7220 MODULE_PARM_DESC(debug, "Sets debug level bit-mask");
7221
7222 module_param(force_load, bool, 0);
7223 MODULE_PARM_DESC(force_load,
7224 "Attempts to load the driver even on a "
7225 "mis-identified ThinkPad when true");
7226
7227 module_param_named(fan_control, fan_control_allowed, bool, 0);
7228 MODULE_PARM_DESC(fan_control,
7229 "Enables setting fan parameters features when true");
7230
7231 module_param_named(brightness_mode, brightness_mode, int, 0);
7232 MODULE_PARM_DESC(brightness_mode,
7233 "Selects brightness control strategy: "
7234 "0=auto, 1=EC, 2=CMOS, 3=both");
7235
7236 module_param(brightness_enable, uint, 0);
7237 MODULE_PARM_DESC(brightness_enable,
7238 "Enables backlight control when 1, disables when 0");
7239
7240 module_param(hotkey_report_mode, uint, 0);
7241 MODULE_PARM_DESC(hotkey_report_mode,
7242 "used for backwards compatibility with userspace, "
7243 "see documentation");
7244
7245 #define TPACPI_PARAM(feature) \
7246 module_param_call(feature, set_ibm_param, NULL, NULL, 0); \
7247 MODULE_PARM_DESC(feature, "Simulates thinkpad-acpi procfs command " \
7248 "at module load, see documentation")
7249
7250 TPACPI_PARAM(hotkey);
7251 TPACPI_PARAM(bluetooth);
7252 TPACPI_PARAM(video);
7253 TPACPI_PARAM(light);
7254 #ifdef CONFIG_THINKPAD_ACPI_DOCK
7255 TPACPI_PARAM(dock);
7256 #endif
7257 #ifdef CONFIG_THINKPAD_ACPI_BAY
7258 TPACPI_PARAM(bay);
7259 #endif /* CONFIG_THINKPAD_ACPI_BAY */
7260 TPACPI_PARAM(cmos);
7261 TPACPI_PARAM(led);
7262 TPACPI_PARAM(beep);
7263 TPACPI_PARAM(ecdump);
7264 TPACPI_PARAM(brightness);
7265 TPACPI_PARAM(volume);
7266 TPACPI_PARAM(fan);
7267
7268 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
7269 module_param(dbg_wlswemul, uint, 0);
7270 MODULE_PARM_DESC(dbg_wlswemul, "Enables WLSW emulation");
7271 module_param_named(wlsw_state, tpacpi_wlsw_emulstate, bool, 0);
7272 MODULE_PARM_DESC(wlsw_state,
7273 "Initial state of the emulated WLSW switch");
7274
7275 module_param(dbg_bluetoothemul, uint, 0);
7276 MODULE_PARM_DESC(dbg_bluetoothemul, "Enables bluetooth switch emulation");
7277 module_param_named(bluetooth_state, tpacpi_bluetooth_emulstate, bool, 0);
7278 MODULE_PARM_DESC(bluetooth_state,
7279 "Initial state of the emulated bluetooth switch");
7280
7281 module_param(dbg_wwanemul, uint, 0);
7282 MODULE_PARM_DESC(dbg_wwanemul, "Enables WWAN switch emulation");
7283 module_param_named(wwan_state, tpacpi_wwan_emulstate, bool, 0);
7284 MODULE_PARM_DESC(wwan_state,
7285 "Initial state of the emulated WWAN switch");
7286
7287 module_param(dbg_uwbemul, uint, 0);
7288 MODULE_PARM_DESC(dbg_uwbemul, "Enables UWB switch emulation");
7289 module_param_named(uwb_state, tpacpi_uwb_emulstate, bool, 0);
7290 MODULE_PARM_DESC(uwb_state,
7291 "Initial state of the emulated UWB switch");
7292 #endif
7293
7294 static void thinkpad_acpi_module_exit(void)
7295 {
7296 struct ibm_struct *ibm, *itmp;
7297
7298 tpacpi_lifecycle = TPACPI_LIFE_EXITING;
7299
7300 list_for_each_entry_safe_reverse(ibm, itmp,
7301 &tpacpi_all_drivers,
7302 all_drivers) {
7303 ibm_exit(ibm);
7304 }
7305
7306 dbg_printk(TPACPI_DBG_INIT, "finished subdriver exit path...\n");
7307
7308 if (tpacpi_inputdev) {
7309 if (tp_features.input_device_registered)
7310 input_unregister_device(tpacpi_inputdev);
7311 else
7312 input_free_device(tpacpi_inputdev);
7313 }
7314
7315 if (tpacpi_hwmon)
7316 hwmon_device_unregister(tpacpi_hwmon);
7317
7318 if (tp_features.sensors_pdev_attrs_registered)
7319 device_remove_file(&tpacpi_sensors_pdev->dev,
7320 &dev_attr_thinkpad_acpi_pdev_name);
7321 if (tpacpi_sensors_pdev)
7322 platform_device_unregister(tpacpi_sensors_pdev);
7323 if (tpacpi_pdev)
7324 platform_device_unregister(tpacpi_pdev);
7325
7326 if (tp_features.sensors_pdrv_attrs_registered)
7327 tpacpi_remove_driver_attributes(&tpacpi_hwmon_pdriver.driver);
7328 if (tp_features.platform_drv_attrs_registered)
7329 tpacpi_remove_driver_attributes(&tpacpi_pdriver.driver);
7330
7331 if (tp_features.sensors_pdrv_registered)
7332 platform_driver_unregister(&tpacpi_hwmon_pdriver);
7333
7334 if (tp_features.platform_drv_registered)
7335 platform_driver_unregister(&tpacpi_pdriver);
7336
7337 if (proc_dir)
7338 remove_proc_entry(TPACPI_PROC_DIR, acpi_root_dir);
7339
7340 if (tpacpi_wq)
7341 destroy_workqueue(tpacpi_wq);
7342
7343 kfree(thinkpad_id.bios_version_str);
7344 kfree(thinkpad_id.ec_version_str);
7345 kfree(thinkpad_id.model_str);
7346 }
7347
7348
7349 static int __init thinkpad_acpi_module_init(void)
7350 {
7351 int ret, i;
7352
7353 tpacpi_lifecycle = TPACPI_LIFE_INIT;
7354
7355 /* Parameter checking */
7356 if (hotkey_report_mode > 2)
7357 return -EINVAL;
7358
7359 /* Driver-level probe */
7360
7361 ret = get_thinkpad_model_data(&thinkpad_id);
7362 if (ret) {
7363 printk(TPACPI_ERR
7364 "unable to get DMI data: %d\n", ret);
7365 thinkpad_acpi_module_exit();
7366 return ret;
7367 }
7368 ret = probe_for_thinkpad();
7369 if (ret) {
7370 thinkpad_acpi_module_exit();
7371 return ret;
7372 }
7373
7374 /* Driver initialization */
7375
7376 TPACPI_ACPIHANDLE_INIT(ecrd);
7377 TPACPI_ACPIHANDLE_INIT(ecwr);
7378
7379 tpacpi_wq = create_singlethread_workqueue(TPACPI_WORKQUEUE_NAME);
7380 if (!tpacpi_wq) {
7381 thinkpad_acpi_module_exit();
7382 return -ENOMEM;
7383 }
7384
7385 proc_dir = proc_mkdir(TPACPI_PROC_DIR, acpi_root_dir);
7386 if (!proc_dir) {
7387 printk(TPACPI_ERR
7388 "unable to create proc dir " TPACPI_PROC_DIR);
7389 thinkpad_acpi_module_exit();
7390 return -ENODEV;
7391 }
7392 proc_dir->owner = THIS_MODULE;
7393
7394 ret = platform_driver_register(&tpacpi_pdriver);
7395 if (ret) {
7396 printk(TPACPI_ERR
7397 "unable to register main platform driver\n");
7398 thinkpad_acpi_module_exit();
7399 return ret;
7400 }
7401 tp_features.platform_drv_registered = 1;
7402
7403 ret = platform_driver_register(&tpacpi_hwmon_pdriver);
7404 if (ret) {
7405 printk(TPACPI_ERR
7406 "unable to register hwmon platform driver\n");
7407 thinkpad_acpi_module_exit();
7408 return ret;
7409 }
7410 tp_features.sensors_pdrv_registered = 1;
7411
7412 ret = tpacpi_create_driver_attributes(&tpacpi_pdriver.driver);
7413 if (!ret) {
7414 tp_features.platform_drv_attrs_registered = 1;
7415 ret = tpacpi_create_driver_attributes(
7416 &tpacpi_hwmon_pdriver.driver);
7417 }
7418 if (ret) {
7419 printk(TPACPI_ERR
7420 "unable to create sysfs driver attributes\n");
7421 thinkpad_acpi_module_exit();
7422 return ret;
7423 }
7424 tp_features.sensors_pdrv_attrs_registered = 1;
7425
7426
7427 /* Device initialization */
7428 tpacpi_pdev = platform_device_register_simple(TPACPI_DRVR_NAME, -1,
7429 NULL, 0);
7430 if (IS_ERR(tpacpi_pdev)) {
7431 ret = PTR_ERR(tpacpi_pdev);
7432 tpacpi_pdev = NULL;
7433 printk(TPACPI_ERR "unable to register platform device\n");
7434 thinkpad_acpi_module_exit();
7435 return ret;
7436 }
7437 tpacpi_sensors_pdev = platform_device_register_simple(
7438 TPACPI_HWMON_DRVR_NAME,
7439 -1, NULL, 0);
7440 if (IS_ERR(tpacpi_sensors_pdev)) {
7441 ret = PTR_ERR(tpacpi_sensors_pdev);
7442 tpacpi_sensors_pdev = NULL;
7443 printk(TPACPI_ERR
7444 "unable to register hwmon platform device\n");
7445 thinkpad_acpi_module_exit();
7446 return ret;
7447 }
7448 ret = device_create_file(&tpacpi_sensors_pdev->dev,
7449 &dev_attr_thinkpad_acpi_pdev_name);
7450 if (ret) {
7451 printk(TPACPI_ERR
7452 "unable to create sysfs hwmon device attributes\n");
7453 thinkpad_acpi_module_exit();
7454 return ret;
7455 }
7456 tp_features.sensors_pdev_attrs_registered = 1;
7457 tpacpi_hwmon = hwmon_device_register(&tpacpi_sensors_pdev->dev);
7458 if (IS_ERR(tpacpi_hwmon)) {
7459 ret = PTR_ERR(tpacpi_hwmon);
7460 tpacpi_hwmon = NULL;
7461 printk(TPACPI_ERR "unable to register hwmon device\n");
7462 thinkpad_acpi_module_exit();
7463 return ret;
7464 }
7465 mutex_init(&tpacpi_inputdev_send_mutex);
7466 tpacpi_inputdev = input_allocate_device();
7467 if (!tpacpi_inputdev) {
7468 printk(TPACPI_ERR "unable to allocate input device\n");
7469 thinkpad_acpi_module_exit();
7470 return -ENOMEM;
7471 } else {
7472 /* Prepare input device, but don't register */
7473 tpacpi_inputdev->name = "ThinkPad Extra Buttons";
7474 tpacpi_inputdev->phys = TPACPI_DRVR_NAME "/input0";
7475 tpacpi_inputdev->id.bustype = BUS_HOST;
7476 tpacpi_inputdev->id.vendor = (thinkpad_id.vendor) ?
7477 thinkpad_id.vendor :
7478 PCI_VENDOR_ID_IBM;
7479 tpacpi_inputdev->id.product = TPACPI_HKEY_INPUT_PRODUCT;
7480 tpacpi_inputdev->id.version = TPACPI_HKEY_INPUT_VERSION;
7481 }
7482 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
7483 ret = ibm_init(&ibms_init[i]);
7484 if (ret >= 0 && *ibms_init[i].param)
7485 ret = ibms_init[i].data->write(ibms_init[i].param);
7486 if (ret < 0) {
7487 thinkpad_acpi_module_exit();
7488 return ret;
7489 }
7490 }
7491 ret = input_register_device(tpacpi_inputdev);
7492 if (ret < 0) {
7493 printk(TPACPI_ERR "unable to register input device\n");
7494 thinkpad_acpi_module_exit();
7495 return ret;
7496 } else {
7497 tp_features.input_device_registered = 1;
7498 }
7499
7500 tpacpi_lifecycle = TPACPI_LIFE_RUNNING;
7501 return 0;
7502 }
7503
7504 /* Please remove this in year 2009 */
7505 MODULE_ALIAS("ibm_acpi");
7506
7507 MODULE_ALIAS(TPACPI_DRVR_SHORTNAME);
7508
7509 /*
7510 * DMI matching for module autoloading
7511 *
7512 * See http://thinkwiki.org/wiki/List_of_DMI_IDs
7513 * See http://thinkwiki.org/wiki/BIOS_Upgrade_Downloads
7514 *
7515 * Only models listed in thinkwiki will be supported, so add yours
7516 * if it is not there yet.
7517 */
7518 #define IBM_BIOS_MODULE_ALIAS(__type) \
7519 MODULE_ALIAS("dmi:bvnIBM:bvr" __type "ET??WW")
7520
7521 /* Non-ancient thinkpads */
7522 MODULE_ALIAS("dmi:bvnIBM:*:svnIBM:*:pvrThinkPad*:rvnIBM:*");
7523 MODULE_ALIAS("dmi:bvnLENOVO:*:svnLENOVO:*:pvrThinkPad*:rvnLENOVO:*");
7524
7525 /* Ancient thinkpad BIOSes have to be identified by
7526 * BIOS type or model number, and there are far less
7527 * BIOS types than model numbers... */
7528 IBM_BIOS_MODULE_ALIAS("I[B,D,H,I,M,N,O,T,W,V,Y,Z]");
7529 IBM_BIOS_MODULE_ALIAS("1[0,3,6,8,A-G,I,K,M-P,S,T]");
7530 IBM_BIOS_MODULE_ALIAS("K[U,X-Z]");
7531
7532 MODULE_AUTHOR("Borislav Deianov, Henrique de Moraes Holschuh");
7533 MODULE_DESCRIPTION(TPACPI_DESC);
7534 MODULE_VERSION(TPACPI_VERSION);
7535 MODULE_LICENSE("GPL");
7536
7537 module_init(thinkpad_acpi_module_init);
7538 module_exit(thinkpad_acpi_module_exit);
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree