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ACPI: thinkpad-acpi: clean-up fan subdriver quirk
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / platform / x86 / thinkpad_acpi.c
blobb1956d2d72f8380dd587808a2e710057841ad84a
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 #include <acpi/acnamesp.h>
80
81 #include <linux/pci_ids.h>
82
83
84 /* ThinkPad CMOS commands */
85 #define TP_CMOS_VOLUME_DOWN 0
86 #define TP_CMOS_VOLUME_UP 1
87 #define TP_CMOS_VOLUME_MUTE 2
88 #define TP_CMOS_BRIGHTNESS_UP 4
89 #define TP_CMOS_BRIGHTNESS_DOWN 5
90 #define TP_CMOS_THINKLIGHT_ON 12
91 #define TP_CMOS_THINKLIGHT_OFF 13
92
93 /* NVRAM Addresses */
94 enum tp_nvram_addr {
95 TP_NVRAM_ADDR_HK2 = 0x57,
96 TP_NVRAM_ADDR_THINKLIGHT = 0x58,
97 TP_NVRAM_ADDR_VIDEO = 0x59,
98 TP_NVRAM_ADDR_BRIGHTNESS = 0x5e,
99 TP_NVRAM_ADDR_MIXER = 0x60,
100 };
101
102 /* NVRAM bit masks */
103 enum {
104 TP_NVRAM_MASK_HKT_THINKPAD = 0x08,
105 TP_NVRAM_MASK_HKT_ZOOM = 0x20,
106 TP_NVRAM_MASK_HKT_DISPLAY = 0x40,
107 TP_NVRAM_MASK_HKT_HIBERNATE = 0x80,
108 TP_NVRAM_MASK_THINKLIGHT = 0x10,
109 TP_NVRAM_MASK_HKT_DISPEXPND = 0x30,
110 TP_NVRAM_MASK_HKT_BRIGHTNESS = 0x20,
111 TP_NVRAM_MASK_LEVEL_BRIGHTNESS = 0x0f,
112 TP_NVRAM_POS_LEVEL_BRIGHTNESS = 0,
113 TP_NVRAM_MASK_MUTE = 0x40,
114 TP_NVRAM_MASK_HKT_VOLUME = 0x80,
115 TP_NVRAM_MASK_LEVEL_VOLUME = 0x0f,
116 TP_NVRAM_POS_LEVEL_VOLUME = 0,
117 };
118
119 /* ACPI HIDs */
120 #define TPACPI_ACPI_HKEY_HID "IBM0068"
121
122 /* Input IDs */
123 #define TPACPI_HKEY_INPUT_PRODUCT 0x5054 /* "TP" */
124 #define TPACPI_HKEY_INPUT_VERSION 0x4101
125
126 /* ACPI \WGSV commands */
127 enum {
128 TP_ACPI_WGSV_GET_STATE = 0x01, /* Get state information */
129 TP_ACPI_WGSV_PWR_ON_ON_RESUME = 0x02, /* Resume WWAN powered on */
130 TP_ACPI_WGSV_PWR_OFF_ON_RESUME = 0x03, /* Resume WWAN powered off */
131 TP_ACPI_WGSV_SAVE_STATE = 0x04, /* Save state for S4/S5 */
132 };
133
134 /* TP_ACPI_WGSV_GET_STATE bits */
135 enum {
136 TP_ACPI_WGSV_STATE_WWANEXIST = 0x0001, /* WWAN hw available */
137 TP_ACPI_WGSV_STATE_WWANPWR = 0x0002, /* WWAN radio enabled */
138 TP_ACPI_WGSV_STATE_WWANPWRRES = 0x0004, /* WWAN state at resume */
139 TP_ACPI_WGSV_STATE_WWANBIOSOFF = 0x0008, /* WWAN disabled in BIOS */
140 TP_ACPI_WGSV_STATE_BLTHEXIST = 0x0001, /* BLTH hw available */
141 TP_ACPI_WGSV_STATE_BLTHPWR = 0x0002, /* BLTH radio enabled */
142 TP_ACPI_WGSV_STATE_BLTHPWRRES = 0x0004, /* BLTH state at resume */
143 TP_ACPI_WGSV_STATE_BLTHBIOSOFF = 0x0008, /* BLTH disabled in BIOS */
144 TP_ACPI_WGSV_STATE_UWBEXIST = 0x0010, /* UWB hw available */
145 TP_ACPI_WGSV_STATE_UWBPWR = 0x0020, /* UWB radio enabled */
146 };
147
148 /****************************************************************************
149 * Main driver
150 */
151
152 #define TPACPI_NAME "thinkpad"
153 #define TPACPI_DESC "ThinkPad ACPI Extras"
154 #define TPACPI_FILE TPACPI_NAME "_acpi"
155 #define TPACPI_URL "http://ibm-acpi.sf.net/"
156 #define TPACPI_MAIL "ibm-acpi-devel@lists.sourceforge.net"
157
158 #define TPACPI_PROC_DIR "ibm"
159 #define TPACPI_ACPI_EVENT_PREFIX "ibm"
160 #define TPACPI_DRVR_NAME TPACPI_FILE
161 #define TPACPI_DRVR_SHORTNAME "tpacpi"
162 #define TPACPI_HWMON_DRVR_NAME TPACPI_NAME "_hwmon"
163
164 #define TPACPI_NVRAM_KTHREAD_NAME "ktpacpi_nvramd"
165 #define TPACPI_WORKQUEUE_NAME "ktpacpid"
166
167 #define TPACPI_MAX_ACPI_ARGS 3
168
169 /* rfkill switches */
170 enum {
171 TPACPI_RFK_BLUETOOTH_SW_ID = 0,
172 TPACPI_RFK_WWAN_SW_ID,
173 TPACPI_RFK_UWB_SW_ID,
174 };
175
176 /* Debugging */
177 #define TPACPI_LOG TPACPI_FILE ": "
178 #define TPACPI_ALERT KERN_ALERT TPACPI_LOG
179 #define TPACPI_CRIT KERN_CRIT TPACPI_LOG
180 #define TPACPI_ERR KERN_ERR TPACPI_LOG
181 #define TPACPI_NOTICE KERN_NOTICE TPACPI_LOG
182 #define TPACPI_INFO KERN_INFO TPACPI_LOG
183 #define TPACPI_DEBUG KERN_DEBUG TPACPI_LOG
184
185 #define TPACPI_DBG_ALL 0xffff
186 #define TPACPI_DBG_INIT 0x0001
187 #define TPACPI_DBG_EXIT 0x0002
188 #define dbg_printk(a_dbg_level, format, arg...) \
189 do { if (dbg_level & a_dbg_level) \
190 printk(TPACPI_DEBUG "%s: " format, __func__ , ## arg); \
191 } while (0)
192 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
193 #define vdbg_printk(a_dbg_level, format, arg...) \
194 dbg_printk(a_dbg_level, format, ## arg)
195 static const char *str_supported(int is_supported);
196 #else
197 #define vdbg_printk(a_dbg_level, format, arg...)
198 #endif
199
200 #define onoff(status, bit) ((status) & (1 << (bit)) ? "on" : "off")
201 #define enabled(status, bit) ((status) & (1 << (bit)) ? "enabled" : "disabled")
202 #define strlencmp(a, b) (strncmp((a), (b), strlen(b)))
203
204
205 /****************************************************************************
206 * Driver-wide structs and misc. variables
207 */
208
209 struct ibm_struct;
210
211 struct tp_acpi_drv_struct {
212 const struct acpi_device_id *hid;
213 struct acpi_driver *driver;
214
215 void (*notify) (struct ibm_struct *, u32);
216 acpi_handle *handle;
217 u32 type;
218 struct acpi_device *device;
219 };
220
221 struct ibm_struct {
222 char *name;
223
224 int (*read) (char *);
225 int (*write) (char *);
226 void (*exit) (void);
227 void (*resume) (void);
228 void (*suspend) (pm_message_t state);
229 void (*shutdown) (void);
230
231 struct list_head all_drivers;
232
233 struct tp_acpi_drv_struct *acpi;
234
235 struct {
236 u8 acpi_driver_registered:1;
237 u8 acpi_notify_installed:1;
238 u8 proc_created:1;
239 u8 init_called:1;
240 u8 experimental:1;
241 } flags;
242 };
243
244 struct ibm_init_struct {
245 char param[32];
246
247 int (*init) (struct ibm_init_struct *);
248 struct ibm_struct *data;
249 };
250
251 static struct {
252 #ifdef CONFIG_THINKPAD_ACPI_BAY
253 u32 bay_status:1;
254 u32 bay_eject:1;
255 u32 bay_status2:1;
256 u32 bay_eject2:1;
257 #endif
258 u32 bluetooth:1;
259 u32 hotkey:1;
260 u32 hotkey_mask:1;
261 u32 hotkey_wlsw:1;
262 u32 hotkey_tablet:1;
263 u32 light:1;
264 u32 light_status:1;
265 u32 bright_16levels:1;
266 u32 bright_acpimode:1;
267 u32 wan:1;
268 u32 uwb:1;
269 u32 fan_ctrl_status_undef:1;
270 u32 input_device_registered:1;
271 u32 platform_drv_registered:1;
272 u32 platform_drv_attrs_registered:1;
273 u32 sensors_pdrv_registered:1;
274 u32 sensors_pdrv_attrs_registered:1;
275 u32 sensors_pdev_attrs_registered:1;
276 u32 hotkey_poll_active:1;
277 } tp_features;
278
279 static struct {
280 u16 hotkey_mask_ff:1;
281 u16 bright_cmos_ec_unsync:1;
282 } tp_warned;
283
284 struct thinkpad_id_data {
285 unsigned int vendor; /* ThinkPad vendor:
286 * PCI_VENDOR_ID_IBM/PCI_VENDOR_ID_LENOVO */
287
288 char *bios_version_str; /* Something like 1ZET51WW (1.03z) */
289 char *ec_version_str; /* Something like 1ZHT51WW-1.04a */
290
291 u16 bios_model; /* Big Endian, TP-1Y = 0x5931, 0 = unknown */
292 u16 ec_model;
293
294 char *model_str; /* ThinkPad T43 */
295 char *nummodel_str; /* 9384A9C for a 9384-A9C model */
296 };
297 static struct thinkpad_id_data thinkpad_id;
298
299 static enum {
300 TPACPI_LIFE_INIT = 0,
301 TPACPI_LIFE_RUNNING,
302 TPACPI_LIFE_EXITING,
303 } tpacpi_lifecycle;
304
305 static int experimental;
306 static u32 dbg_level;
307
308 static struct workqueue_struct *tpacpi_wq;
309
310 enum led_status_t {
311 TPACPI_LED_OFF = 0,
312 TPACPI_LED_ON,
313 TPACPI_LED_BLINK,
314 };
315
316 /* Special LED class that can defer work */
317 struct tpacpi_led_classdev {
318 struct led_classdev led_classdev;
319 struct work_struct work;
320 enum led_status_t new_state;
321 unsigned int led;
322 };
323
324 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
325 static int dbg_wlswemul;
326 static int tpacpi_wlsw_emulstate;
327 static int dbg_bluetoothemul;
328 static int tpacpi_bluetooth_emulstate;
329 static int dbg_wwanemul;
330 static int tpacpi_wwan_emulstate;
331 static int dbg_uwbemul;
332 static int tpacpi_uwb_emulstate;
333 #endif
334
335
336 /****************************************************************************
337 ****************************************************************************
338 *
339 * ACPI Helpers and device model
340 *
341 ****************************************************************************
342 ****************************************************************************/
343
344 /*************************************************************************
345 * ACPI basic handles
346 */
347
348 static acpi_handle root_handle;
349
350 #define TPACPI_HANDLE(object, parent, paths...) \
351 static acpi_handle object##_handle; \
352 static acpi_handle *object##_parent = &parent##_handle; \
353 static char *object##_path; \
354 static char *object##_paths[] = { paths }
355
356 TPACPI_HANDLE(ec, root, "\\_SB.PCI0.ISA.EC0", /* 240, 240x */
357 "\\_SB.PCI.ISA.EC", /* 570 */
358 "\\_SB.PCI0.ISA0.EC0", /* 600e/x, 770e, 770x */
359 "\\_SB.PCI0.ISA.EC", /* A21e, A2xm/p, T20-22, X20-21 */
360 "\\_SB.PCI0.AD4S.EC0", /* i1400, R30 */
361 "\\_SB.PCI0.ICH3.EC0", /* R31 */
362 "\\_SB.PCI0.LPC.EC", /* all others */
363 );
364
365 TPACPI_HANDLE(ecrd, ec, "ECRD"); /* 570 */
366 TPACPI_HANDLE(ecwr, ec, "ECWR"); /* 570 */
367
368 TPACPI_HANDLE(cmos, root, "\\UCMS", /* R50, R50e, R50p, R51, */
369 /* T4x, X31, X40 */
370 "\\CMOS", /* A3x, G4x, R32, T23, T30, X22-24, X30 */
371 "\\CMS", /* R40, R40e */
372 ); /* all others */
373
374 TPACPI_HANDLE(hkey, ec, "\\_SB.HKEY", /* 600e/x, 770e, 770x */
375 "^HKEY", /* R30, R31 */
376 "HKEY", /* all others */
377 ); /* 570 */
378
379 TPACPI_HANDLE(vid, root, "\\_SB.PCI.AGP.VGA", /* 570 */
380 "\\_SB.PCI0.AGP0.VID0", /* 600e/x, 770x */
381 "\\_SB.PCI0.VID0", /* 770e */
382 "\\_SB.PCI0.VID", /* A21e, G4x, R50e, X30, X40 */
383 "\\_SB.PCI0.AGP.VID", /* all others */
384 ); /* R30, R31 */
385
386
387 /*************************************************************************
388 * ACPI helpers
389 */
390
391 static int acpi_evalf(acpi_handle handle,
392 void *res, char *method, char *fmt, ...)
393 {
394 char *fmt0 = fmt;
395 struct acpi_object_list params;
396 union acpi_object in_objs[TPACPI_MAX_ACPI_ARGS];
397 struct acpi_buffer result, *resultp;
398 union acpi_object out_obj;
399 acpi_status status;
400 va_list ap;
401 char res_type;
402 int success;
403 int quiet;
404
405 if (!*fmt) {
406 printk(TPACPI_ERR "acpi_evalf() called with empty format\n");
407 return 0;
408 }
409
410 if (*fmt == 'q') {
411 quiet = 1;
412 fmt++;
413 } else
414 quiet = 0;
415
416 res_type = *(fmt++);
417
418 params.count = 0;
419 params.pointer = &in_objs[0];
420
421 va_start(ap, fmt);
422 while (*fmt) {
423 char c = *(fmt++);
424 switch (c) {
425 case 'd': /* int */
426 in_objs[params.count].integer.value = va_arg(ap, int);
427 in_objs[params.count++].type = ACPI_TYPE_INTEGER;
428 break;
429 /* add more types as needed */
430 default:
431 printk(TPACPI_ERR "acpi_evalf() called "
432 "with invalid format character '%c'\n", c);
433 return 0;
434 }
435 }
436 va_end(ap);
437
438 if (res_type != 'v') {
439 result.length = sizeof(out_obj);
440 result.pointer = &out_obj;
441 resultp = &result;
442 } else
443 resultp = NULL;
444
445 status = acpi_evaluate_object(handle, method, &params, resultp);
446
447 switch (res_type) {
448 case 'd': /* int */
449 if (res)
450 *(int *)res = out_obj.integer.value;
451 success = status == AE_OK && out_obj.type == ACPI_TYPE_INTEGER;
452 break;
453 case 'v': /* void */
454 success = status == AE_OK;
455 break;
456 /* add more types as needed */
457 default:
458 printk(TPACPI_ERR "acpi_evalf() called "
459 "with invalid format character '%c'\n", res_type);
460 return 0;
461 }
462
463 if (!success && !quiet)
464 printk(TPACPI_ERR "acpi_evalf(%s, %s, ...) failed: %d\n",
465 method, fmt0, status);
466
467 return success;
468 }
469
470 static int acpi_ec_read(int i, u8 *p)
471 {
472 int v;
473
474 if (ecrd_handle) {
475 if (!acpi_evalf(ecrd_handle, &v, NULL, "dd", i))
476 return 0;
477 *p = v;
478 } else {
479 if (ec_read(i, p) < 0)
480 return 0;
481 }
482
483 return 1;
484 }
485
486 static int acpi_ec_write(int i, u8 v)
487 {
488 if (ecwr_handle) {
489 if (!acpi_evalf(ecwr_handle, NULL, NULL, "vdd", i, v))
490 return 0;
491 } else {
492 if (ec_write(i, v) < 0)
493 return 0;
494 }
495
496 return 1;
497 }
498
499 #if defined(CONFIG_THINKPAD_ACPI_DOCK) || defined(CONFIG_THINKPAD_ACPI_BAY)
500 static int _sta(acpi_handle handle)
501 {
502 int status;
503
504 if (!handle || !acpi_evalf(handle, &status, "_STA", "d"))
505 status = 0;
506
507 return status;
508 }
509 #endif
510
511 static int issue_thinkpad_cmos_command(int cmos_cmd)
512 {
513 if (!cmos_handle)
514 return -ENXIO;
515
516 if (!acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd))
517 return -EIO;
518
519 return 0;
520 }
521
522 /*************************************************************************
523 * ACPI device model
524 */
525
526 #define TPACPI_ACPIHANDLE_INIT(object) \
527 drv_acpi_handle_init(#object, &object##_handle, *object##_parent, \
528 object##_paths, ARRAY_SIZE(object##_paths), &object##_path)
529
530 static void drv_acpi_handle_init(char *name,
531 acpi_handle *handle, acpi_handle parent,
532 char **paths, int num_paths, char **path)
533 {
534 int i;
535 acpi_status status;
536
537 vdbg_printk(TPACPI_DBG_INIT, "trying to locate ACPI handle for %s\n",
538 name);
539
540 for (i = 0; i < num_paths; i++) {
541 status = acpi_get_handle(parent, paths[i], handle);
542 if (ACPI_SUCCESS(status)) {
543 *path = paths[i];
544 dbg_printk(TPACPI_DBG_INIT,
545 "Found ACPI handle %s for %s\n",
546 *path, name);
547 return;
548 }
549 }
550
551 vdbg_printk(TPACPI_DBG_INIT, "ACPI handle for %s not found\n",
552 name);
553 *handle = NULL;
554 }
555
556 static void dispatch_acpi_notify(acpi_handle handle, u32 event, void *data)
557 {
558 struct ibm_struct *ibm = data;
559
560 if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
561 return;
562
563 if (!ibm || !ibm->acpi || !ibm->acpi->notify)
564 return;
565
566 ibm->acpi->notify(ibm, event);
567 }
568
569 static int __init setup_acpi_notify(struct ibm_struct *ibm)
570 {
571 acpi_status status;
572 int rc;
573
574 BUG_ON(!ibm->acpi);
575
576 if (!*ibm->acpi->handle)
577 return 0;
578
579 vdbg_printk(TPACPI_DBG_INIT,
580 "setting up ACPI notify for %s\n", ibm->name);
581
582 rc = acpi_bus_get_device(*ibm->acpi->handle, &ibm->acpi->device);
583 if (rc < 0) {
584 printk(TPACPI_ERR "acpi_bus_get_device(%s) failed: %d\n",
585 ibm->name, rc);
586 return -ENODEV;
587 }
588
589 ibm->acpi->device->driver_data = ibm;
590 sprintf(acpi_device_class(ibm->acpi->device), "%s/%s",
591 TPACPI_ACPI_EVENT_PREFIX,
592 ibm->name);
593
594 status = acpi_install_notify_handler(*ibm->acpi->handle,
595 ibm->acpi->type, dispatch_acpi_notify, ibm);
596 if (ACPI_FAILURE(status)) {
597 if (status == AE_ALREADY_EXISTS) {
598 printk(TPACPI_NOTICE
599 "another device driver is already "
600 "handling %s events\n", ibm->name);
601 } else {
602 printk(TPACPI_ERR
603 "acpi_install_notify_handler(%s) failed: %d\n",
604 ibm->name, status);
605 }
606 return -ENODEV;
607 }
608 ibm->flags.acpi_notify_installed = 1;
609 return 0;
610 }
611
612 static int __init tpacpi_device_add(struct acpi_device *device)
613 {
614 return 0;
615 }
616
617 static int __init register_tpacpi_subdriver(struct ibm_struct *ibm)
618 {
619 int rc;
620
621 dbg_printk(TPACPI_DBG_INIT,
622 "registering %s as an ACPI driver\n", ibm->name);
623
624 BUG_ON(!ibm->acpi);
625
626 ibm->acpi->driver = kzalloc(sizeof(struct acpi_driver), GFP_KERNEL);
627 if (!ibm->acpi->driver) {
628 printk(TPACPI_ERR
629 "failed to allocate memory for ibm->acpi->driver\n");
630 return -ENOMEM;
631 }
632
633 sprintf(ibm->acpi->driver->name, "%s_%s", TPACPI_NAME, ibm->name);
634 ibm->acpi->driver->ids = ibm->acpi->hid;
635
636 ibm->acpi->driver->ops.add = &tpacpi_device_add;
637
638 rc = acpi_bus_register_driver(ibm->acpi->driver);
639 if (rc < 0) {
640 printk(TPACPI_ERR "acpi_bus_register_driver(%s) failed: %d\n",
641 ibm->name, rc);
642 kfree(ibm->acpi->driver);
643 ibm->acpi->driver = NULL;
644 } else if (!rc)
645 ibm->flags.acpi_driver_registered = 1;
646
647 return rc;
648 }
649
650
651 /****************************************************************************
652 ****************************************************************************
653 *
654 * Procfs Helpers
655 *
656 ****************************************************************************
657 ****************************************************************************/
658
659 static int dispatch_procfs_read(char *page, char **start, off_t off,
660 int count, int *eof, void *data)
661 {
662 struct ibm_struct *ibm = data;
663 int len;
664
665 if (!ibm || !ibm->read)
666 return -EINVAL;
667
668 len = ibm->read(page);
669 if (len < 0)
670 return len;
671
672 if (len <= off + count)
673 *eof = 1;
674 *start = page + off;
675 len -= off;
676 if (len > count)
677 len = count;
678 if (len < 0)
679 len = 0;
680
681 return len;
682 }
683
684 static int dispatch_procfs_write(struct file *file,
685 const char __user *userbuf,
686 unsigned long count, void *data)
687 {
688 struct ibm_struct *ibm = data;
689 char *kernbuf;
690 int ret;
691
692 if (!ibm || !ibm->write)
693 return -EINVAL;
694
695 kernbuf = kmalloc(count + 2, GFP_KERNEL);
696 if (!kernbuf)
697 return -ENOMEM;
698
699 if (copy_from_user(kernbuf, userbuf, count)) {
700 kfree(kernbuf);
701 return -EFAULT;
702 }
703
704 kernbuf[count] = 0;
705 strcat(kernbuf, ",");
706 ret = ibm->write(kernbuf);
707 if (ret == 0)
708 ret = count;
709
710 kfree(kernbuf);
711
712 return ret;
713 }
714
715 static char *next_cmd(char **cmds)
716 {
717 char *start = *cmds;
718 char *end;
719
720 while ((end = strchr(start, ',')) && end == start)
721 start = end + 1;
722
723 if (!end)
724 return NULL;
725
726 *end = 0;
727 *cmds = end + 1;
728 return start;
729 }
730
731
732 /****************************************************************************
733 ****************************************************************************
734 *
735 * Device model: input, hwmon and platform
736 *
737 ****************************************************************************
738 ****************************************************************************/
739
740 static struct platform_device *tpacpi_pdev;
741 static struct platform_device *tpacpi_sensors_pdev;
742 static struct device *tpacpi_hwmon;
743 static struct input_dev *tpacpi_inputdev;
744 static struct mutex tpacpi_inputdev_send_mutex;
745 static LIST_HEAD(tpacpi_all_drivers);
746
747 static int tpacpi_suspend_handler(struct platform_device *pdev,
748 pm_message_t state)
749 {
750 struct ibm_struct *ibm, *itmp;
751
752 list_for_each_entry_safe(ibm, itmp,
753 &tpacpi_all_drivers,
754 all_drivers) {
755 if (ibm->suspend)
756 (ibm->suspend)(state);
757 }
758
759 return 0;
760 }
761
762 static int tpacpi_resume_handler(struct platform_device *pdev)
763 {
764 struct ibm_struct *ibm, *itmp;
765
766 list_for_each_entry_safe(ibm, itmp,
767 &tpacpi_all_drivers,
768 all_drivers) {
769 if (ibm->resume)
770 (ibm->resume)();
771 }
772
773 return 0;
774 }
775
776 static void tpacpi_shutdown_handler(struct platform_device *pdev)
777 {
778 struct ibm_struct *ibm, *itmp;
779
780 list_for_each_entry_safe(ibm, itmp,
781 &tpacpi_all_drivers,
782 all_drivers) {
783 if (ibm->shutdown)
784 (ibm->shutdown)();
785 }
786 }
787
788 static struct platform_driver tpacpi_pdriver = {
789 .driver = {
790 .name = TPACPI_DRVR_NAME,
791 .owner = THIS_MODULE,
792 },
793 .suspend = tpacpi_suspend_handler,
794 .resume = tpacpi_resume_handler,
795 .shutdown = tpacpi_shutdown_handler,
796 };
797
798 static struct platform_driver tpacpi_hwmon_pdriver = {
799 .driver = {
800 .name = TPACPI_HWMON_DRVR_NAME,
801 .owner = THIS_MODULE,
802 },
803 };
804
805 /*************************************************************************
806 * sysfs support helpers
807 */
808
809 struct attribute_set {
810 unsigned int members, max_members;
811 struct attribute_group group;
812 };
813
814 struct attribute_set_obj {
815 struct attribute_set s;
816 struct attribute *a;
817 } __attribute__((packed));
818
819 static struct attribute_set *create_attr_set(unsigned int max_members,
820 const char *name)
821 {
822 struct attribute_set_obj *sobj;
823
824 if (max_members == 0)
825 return NULL;
826
827 /* Allocates space for implicit NULL at the end too */
828 sobj = kzalloc(sizeof(struct attribute_set_obj) +
829 max_members * sizeof(struct attribute *),
830 GFP_KERNEL);
831 if (!sobj)
832 return NULL;
833 sobj->s.max_members = max_members;
834 sobj->s.group.attrs = &sobj->a;
835 sobj->s.group.name = name;
836
837 return &sobj->s;
838 }
839
840 #define destroy_attr_set(_set) \
841 kfree(_set);
842
843 /* not multi-threaded safe, use it in a single thread per set */
844 static int add_to_attr_set(struct attribute_set *s, struct attribute *attr)
845 {
846 if (!s || !attr)
847 return -EINVAL;
848
849 if (s->members >= s->max_members)
850 return -ENOMEM;
851
852 s->group.attrs[s->members] = attr;
853 s->members++;
854
855 return 0;
856 }
857
858 static int add_many_to_attr_set(struct attribute_set *s,
859 struct attribute **attr,
860 unsigned int count)
861 {
862 int i, res;
863
864 for (i = 0; i < count; i++) {
865 res = add_to_attr_set(s, attr[i]);
866 if (res)
867 return res;
868 }
869
870 return 0;
871 }
872
873 static void delete_attr_set(struct attribute_set *s, struct kobject *kobj)
874 {
875 sysfs_remove_group(kobj, &s->group);
876 destroy_attr_set(s);
877 }
878
879 #define register_attr_set_with_sysfs(_attr_set, _kobj) \
880 sysfs_create_group(_kobj, &_attr_set->group)
881
882 static int parse_strtoul(const char *buf,
883 unsigned long max, unsigned long *value)
884 {
885 char *endp;
886
887 while (*buf && isspace(*buf))
888 buf++;
889 *value = simple_strtoul(buf, &endp, 0);
890 while (*endp && isspace(*endp))
891 endp++;
892 if (*endp || *value > max)
893 return -EINVAL;
894
895 return 0;
896 }
897
898 static void tpacpi_disable_brightness_delay(void)
899 {
900 if (acpi_evalf(hkey_handle, NULL, "PWMS", "qvd", 0))
901 printk(TPACPI_NOTICE
902 "ACPI backlight control delay disabled\n");
903 }
904
905 static int __init tpacpi_query_bcl_levels(acpi_handle handle)
906 {
907 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
908 union acpi_object *obj;
909 int rc;
910
911 if (ACPI_SUCCESS(acpi_evaluate_object(handle, NULL, NULL, &buffer))) {
912 obj = (union acpi_object *)buffer.pointer;
913 if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) {
914 printk(TPACPI_ERR "Unknown _BCL data, "
915 "please report this to %s\n", TPACPI_MAIL);
916 rc = 0;
917 } else {
918 rc = obj->package.count;
919 }
920 } else {
921 return 0;
922 }
923
924 kfree(buffer.pointer);
925 return rc;
926 }
927
928 static acpi_status __init tpacpi_acpi_walk_find_bcl(acpi_handle handle,
929 u32 lvl, void *context, void **rv)
930 {
931 char name[ACPI_PATH_SEGMENT_LENGTH];
932 struct acpi_buffer buffer = { sizeof(name), &name };
933
934 if (ACPI_SUCCESS(acpi_get_name(handle, ACPI_SINGLE_NAME, &buffer)) &&
935 !strncmp("_BCL", name, sizeof(name) - 1)) {
936 BUG_ON(!rv || !*rv);
937 **(int **)rv = tpacpi_query_bcl_levels(handle);
938 return AE_CTRL_TERMINATE;
939 } else {
940 return AE_OK;
941 }
942 }
943
944 /*
945 * Returns 0 (no ACPI _BCL or _BCL invalid), or size of brightness map
946 */
947 static int __init tpacpi_check_std_acpi_brightness_support(void)
948 {
949 int status;
950 int bcl_levels = 0;
951 void *bcl_ptr = &bcl_levels;
952
953 if (!vid_handle) {
954 TPACPI_ACPIHANDLE_INIT(vid);
955 }
956 if (!vid_handle)
957 return 0;
958
959 /*
960 * Search for a _BCL method, and execute it. This is safe on all
961 * ThinkPads, and as a side-effect, _BCL will place a Lenovo Vista
962 * BIOS in ACPI backlight control mode. We do NOT have to care
963 * about calling the _BCL method in an enabled video device, any
964 * will do for our purposes.
965 */
966
967 status = acpi_walk_namespace(ACPI_TYPE_METHOD, vid_handle, 3,
968 tpacpi_acpi_walk_find_bcl, NULL,
969 &bcl_ptr);
970
971 if (ACPI_SUCCESS(status) && bcl_levels > 2) {
972 tp_features.bright_acpimode = 1;
973 return (bcl_levels - 2);
974 }
975
976 return 0;
977 }
978
979 static int __init tpacpi_new_rfkill(const unsigned int id,
980 struct rfkill **rfk,
981 const enum rfkill_type rfktype,
982 const char *name,
983 const bool set_default,
984 int (*toggle_radio)(void *, enum rfkill_state),
985 int (*get_state)(void *, enum rfkill_state *))
986 {
987 int res;
988 enum rfkill_state initial_state = RFKILL_STATE_SOFT_BLOCKED;
989
990 res = get_state(NULL, &initial_state);
991 if (res < 0) {
992 printk(TPACPI_ERR
993 "failed to read initial state for %s, error %d; "
994 "will turn radio off\n", name, res);
995 } else if (set_default) {
996 /* try to set the initial state as the default for the rfkill
997 * type, since we ask the firmware to preserve it across S5 in
998 * NVRAM */
999 rfkill_set_default(rfktype,
1000 (initial_state == RFKILL_STATE_UNBLOCKED) ?
1001 RFKILL_STATE_UNBLOCKED :
1002 RFKILL_STATE_SOFT_BLOCKED);
1003 }
1004
1005 *rfk = rfkill_allocate(&tpacpi_pdev->dev, rfktype);
1006 if (!*rfk) {
1007 printk(TPACPI_ERR
1008 "failed to allocate memory for rfkill class\n");
1009 return -ENOMEM;
1010 }
1011
1012 (*rfk)->name = name;
1013 (*rfk)->get_state = get_state;
1014 (*rfk)->toggle_radio = toggle_radio;
1015 (*rfk)->state = initial_state;
1016
1017 res = rfkill_register(*rfk);
1018 if (res < 0) {
1019 printk(TPACPI_ERR
1020 "failed to register %s rfkill switch: %d\n",
1021 name, res);
1022 rfkill_free(*rfk);
1023 *rfk = NULL;
1024 return res;
1025 }
1026
1027 return 0;
1028 }
1029
1030 /*************************************************************************
1031 * thinkpad-acpi driver attributes
1032 */
1033
1034 /* interface_version --------------------------------------------------- */
1035 static ssize_t tpacpi_driver_interface_version_show(
1036 struct device_driver *drv,
1037 char *buf)
1038 {
1039 return snprintf(buf, PAGE_SIZE, "0x%08x\n", TPACPI_SYSFS_VERSION);
1040 }
1041
1042 static DRIVER_ATTR(interface_version, S_IRUGO,
1043 tpacpi_driver_interface_version_show, NULL);
1044
1045 /* debug_level --------------------------------------------------------- */
1046 static ssize_t tpacpi_driver_debug_show(struct device_driver *drv,
1047 char *buf)
1048 {
1049 return snprintf(buf, PAGE_SIZE, "0x%04x\n", dbg_level);
1050 }
1051
1052 static ssize_t tpacpi_driver_debug_store(struct device_driver *drv,
1053 const char *buf, size_t count)
1054 {
1055 unsigned long t;
1056
1057 if (parse_strtoul(buf, 0xffff, &t))
1058 return -EINVAL;
1059
1060 dbg_level = t;
1061
1062 return count;
1063 }
1064
1065 static DRIVER_ATTR(debug_level, S_IWUSR | S_IRUGO,
1066 tpacpi_driver_debug_show, tpacpi_driver_debug_store);
1067
1068 /* version ------------------------------------------------------------- */
1069 static ssize_t tpacpi_driver_version_show(struct device_driver *drv,
1070 char *buf)
1071 {
1072 return snprintf(buf, PAGE_SIZE, "%s v%s\n",
1073 TPACPI_DESC, TPACPI_VERSION);
1074 }
1075
1076 static DRIVER_ATTR(version, S_IRUGO,
1077 tpacpi_driver_version_show, NULL);
1078
1079 /* --------------------------------------------------------------------- */
1080
1081 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
1082
1083 static void tpacpi_send_radiosw_update(void);
1084
1085 /* wlsw_emulstate ------------------------------------------------------ */
1086 static ssize_t tpacpi_driver_wlsw_emulstate_show(struct device_driver *drv,
1087 char *buf)
1088 {
1089 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_wlsw_emulstate);
1090 }
1091
1092 static ssize_t tpacpi_driver_wlsw_emulstate_store(struct device_driver *drv,
1093 const char *buf, size_t count)
1094 {
1095 unsigned long t;
1096
1097 if (parse_strtoul(buf, 1, &t))
1098 return -EINVAL;
1099
1100 if (tpacpi_wlsw_emulstate != t) {
1101 tpacpi_wlsw_emulstate = !!t;
1102 tpacpi_send_radiosw_update();
1103 } else
1104 tpacpi_wlsw_emulstate = !!t;
1105
1106 return count;
1107 }
1108
1109 static DRIVER_ATTR(wlsw_emulstate, S_IWUSR | S_IRUGO,
1110 tpacpi_driver_wlsw_emulstate_show,
1111 tpacpi_driver_wlsw_emulstate_store);
1112
1113 /* bluetooth_emulstate ------------------------------------------------- */
1114 static ssize_t tpacpi_driver_bluetooth_emulstate_show(
1115 struct device_driver *drv,
1116 char *buf)
1117 {
1118 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_bluetooth_emulstate);
1119 }
1120
1121 static ssize_t tpacpi_driver_bluetooth_emulstate_store(
1122 struct device_driver *drv,
1123 const char *buf, size_t count)
1124 {
1125 unsigned long t;
1126
1127 if (parse_strtoul(buf, 1, &t))
1128 return -EINVAL;
1129
1130 tpacpi_bluetooth_emulstate = !!t;
1131
1132 return count;
1133 }
1134
1135 static DRIVER_ATTR(bluetooth_emulstate, S_IWUSR | S_IRUGO,
1136 tpacpi_driver_bluetooth_emulstate_show,
1137 tpacpi_driver_bluetooth_emulstate_store);
1138
1139 /* wwan_emulstate ------------------------------------------------- */
1140 static ssize_t tpacpi_driver_wwan_emulstate_show(
1141 struct device_driver *drv,
1142 char *buf)
1143 {
1144 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_wwan_emulstate);
1145 }
1146
1147 static ssize_t tpacpi_driver_wwan_emulstate_store(
1148 struct device_driver *drv,
1149 const char *buf, size_t count)
1150 {
1151 unsigned long t;
1152
1153 if (parse_strtoul(buf, 1, &t))
1154 return -EINVAL;
1155
1156 tpacpi_wwan_emulstate = !!t;
1157
1158 return count;
1159 }
1160
1161 static DRIVER_ATTR(wwan_emulstate, S_IWUSR | S_IRUGO,
1162 tpacpi_driver_wwan_emulstate_show,
1163 tpacpi_driver_wwan_emulstate_store);
1164
1165 /* uwb_emulstate ------------------------------------------------- */
1166 static ssize_t tpacpi_driver_uwb_emulstate_show(
1167 struct device_driver *drv,
1168 char *buf)
1169 {
1170 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_uwb_emulstate);
1171 }
1172
1173 static ssize_t tpacpi_driver_uwb_emulstate_store(
1174 struct device_driver *drv,
1175 const char *buf, size_t count)
1176 {
1177 unsigned long t;
1178
1179 if (parse_strtoul(buf, 1, &t))
1180 return -EINVAL;
1181
1182 tpacpi_uwb_emulstate = !!t;
1183
1184 return count;
1185 }
1186
1187 static DRIVER_ATTR(uwb_emulstate, S_IWUSR | S_IRUGO,
1188 tpacpi_driver_uwb_emulstate_show,
1189 tpacpi_driver_uwb_emulstate_store);
1190 #endif
1191
1192 /* --------------------------------------------------------------------- */
1193
1194 static struct driver_attribute *tpacpi_driver_attributes[] = {
1195 &driver_attr_debug_level, &driver_attr_version,
1196 &driver_attr_interface_version,
1197 };
1198
1199 static int __init tpacpi_create_driver_attributes(struct device_driver *drv)
1200 {
1201 int i, res;
1202
1203 i = 0;
1204 res = 0;
1205 while (!res && i < ARRAY_SIZE(tpacpi_driver_attributes)) {
1206 res = driver_create_file(drv, tpacpi_driver_attributes[i]);
1207 i++;
1208 }
1209
1210 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
1211 if (!res && dbg_wlswemul)
1212 res = driver_create_file(drv, &driver_attr_wlsw_emulstate);
1213 if (!res && dbg_bluetoothemul)
1214 res = driver_create_file(drv, &driver_attr_bluetooth_emulstate);
1215 if (!res && dbg_wwanemul)
1216 res = driver_create_file(drv, &driver_attr_wwan_emulstate);
1217 if (!res && dbg_uwbemul)
1218 res = driver_create_file(drv, &driver_attr_uwb_emulstate);
1219 #endif
1220
1221 return res;
1222 }
1223
1224 static void tpacpi_remove_driver_attributes(struct device_driver *drv)
1225 {
1226 int i;
1227
1228 for (i = 0; i < ARRAY_SIZE(tpacpi_driver_attributes); i++)
1229 driver_remove_file(drv, tpacpi_driver_attributes[i]);
1230
1231 #ifdef THINKPAD_ACPI_DEBUGFACILITIES
1232 driver_remove_file(drv, &driver_attr_wlsw_emulstate);
1233 driver_remove_file(drv, &driver_attr_bluetooth_emulstate);
1234 driver_remove_file(drv, &driver_attr_wwan_emulstate);
1235 driver_remove_file(drv, &driver_attr_uwb_emulstate);
1236 #endif
1237 }
1238
1239 /****************************************************************************
1240 ****************************************************************************
1241 *
1242 * Subdrivers
1243 *
1244 ****************************************************************************
1245 ****************************************************************************/
1246
1247 /*************************************************************************
1248 * thinkpad-acpi init subdriver
1249 */
1250
1251 static int __init thinkpad_acpi_driver_init(struct ibm_init_struct *iibm)
1252 {
1253 printk(TPACPI_INFO "%s v%s\n", TPACPI_DESC, TPACPI_VERSION);
1254 printk(TPACPI_INFO "%s\n", TPACPI_URL);
1255
1256 printk(TPACPI_INFO "ThinkPad BIOS %s, EC %s\n",
1257 (thinkpad_id.bios_version_str) ?
1258 thinkpad_id.bios_version_str : "unknown",
1259 (thinkpad_id.ec_version_str) ?
1260 thinkpad_id.ec_version_str : "unknown");
1261
1262 if (thinkpad_id.vendor && thinkpad_id.model_str)
1263 printk(TPACPI_INFO "%s %s, model %s\n",
1264 (thinkpad_id.vendor == PCI_VENDOR_ID_IBM) ?
1265 "IBM" : ((thinkpad_id.vendor ==
1266 PCI_VENDOR_ID_LENOVO) ?
1267 "Lenovo" : "Unknown vendor"),
1268 thinkpad_id.model_str,
1269 (thinkpad_id.nummodel_str) ?
1270 thinkpad_id.nummodel_str : "unknown");
1271
1272 return 0;
1273 }
1274
1275 static int thinkpad_acpi_driver_read(char *p)
1276 {
1277 int len = 0;
1278
1279 len += sprintf(p + len, "driver:\t\t%s\n", TPACPI_DESC);
1280 len += sprintf(p + len, "version:\t%s\n", TPACPI_VERSION);
1281
1282 return len;
1283 }
1284
1285 static struct ibm_struct thinkpad_acpi_driver_data = {
1286 .name = "driver",
1287 .read = thinkpad_acpi_driver_read,
1288 };
1289
1290 /*************************************************************************
1291 * Hotkey subdriver
1292 */
1293
1294 enum { /* hot key scan codes (derived from ACPI DSDT) */
1295 TP_ACPI_HOTKEYSCAN_FNF1 = 0,
1296 TP_ACPI_HOTKEYSCAN_FNF2,
1297 TP_ACPI_HOTKEYSCAN_FNF3,
1298 TP_ACPI_HOTKEYSCAN_FNF4,
1299 TP_ACPI_HOTKEYSCAN_FNF5,
1300 TP_ACPI_HOTKEYSCAN_FNF6,
1301 TP_ACPI_HOTKEYSCAN_FNF7,
1302 TP_ACPI_HOTKEYSCAN_FNF8,
1303 TP_ACPI_HOTKEYSCAN_FNF9,
1304 TP_ACPI_HOTKEYSCAN_FNF10,
1305 TP_ACPI_HOTKEYSCAN_FNF11,
1306 TP_ACPI_HOTKEYSCAN_FNF12,
1307 TP_ACPI_HOTKEYSCAN_FNBACKSPACE,
1308 TP_ACPI_HOTKEYSCAN_FNINSERT,
1309 TP_ACPI_HOTKEYSCAN_FNDELETE,
1310 TP_ACPI_HOTKEYSCAN_FNHOME,
1311 TP_ACPI_HOTKEYSCAN_FNEND,
1312 TP_ACPI_HOTKEYSCAN_FNPAGEUP,
1313 TP_ACPI_HOTKEYSCAN_FNPAGEDOWN,
1314 TP_ACPI_HOTKEYSCAN_FNSPACE,
1315 TP_ACPI_HOTKEYSCAN_VOLUMEUP,
1316 TP_ACPI_HOTKEYSCAN_VOLUMEDOWN,
1317 TP_ACPI_HOTKEYSCAN_MUTE,
1318 TP_ACPI_HOTKEYSCAN_THINKPAD,
1319 };
1320
1321 enum { /* Keys available through NVRAM polling */
1322 TPACPI_HKEY_NVRAM_KNOWN_MASK = 0x00fb88c0U,
1323 TPACPI_HKEY_NVRAM_GOOD_MASK = 0x00fb8000U,
1324 };
1325
1326 enum { /* Positions of some of the keys in hotkey masks */
1327 TP_ACPI_HKEY_DISPSWTCH_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF7,
1328 TP_ACPI_HKEY_DISPXPAND_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF8,
1329 TP_ACPI_HKEY_HIBERNATE_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF12,
1330 TP_ACPI_HKEY_BRGHTUP_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNHOME,
1331 TP_ACPI_HKEY_BRGHTDWN_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNEND,
1332 TP_ACPI_HKEY_THNKLGHT_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNPAGEUP,
1333 TP_ACPI_HKEY_ZOOM_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNSPACE,
1334 TP_ACPI_HKEY_VOLUP_MASK = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEUP,
1335 TP_ACPI_HKEY_VOLDWN_MASK = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEDOWN,
1336 TP_ACPI_HKEY_MUTE_MASK = 1 << TP_ACPI_HOTKEYSCAN_MUTE,
1337 TP_ACPI_HKEY_THINKPAD_MASK = 1 << TP_ACPI_HOTKEYSCAN_THINKPAD,
1338 };
1339
1340 enum { /* NVRAM to ACPI HKEY group map */
1341 TP_NVRAM_HKEY_GROUP_HK2 = TP_ACPI_HKEY_THINKPAD_MASK |
1342 TP_ACPI_HKEY_ZOOM_MASK |
1343 TP_ACPI_HKEY_DISPSWTCH_MASK |
1344 TP_ACPI_HKEY_HIBERNATE_MASK,
1345 TP_NVRAM_HKEY_GROUP_BRIGHTNESS = TP_ACPI_HKEY_BRGHTUP_MASK |
1346 TP_ACPI_HKEY_BRGHTDWN_MASK,
1347 TP_NVRAM_HKEY_GROUP_VOLUME = TP_ACPI_HKEY_VOLUP_MASK |
1348 TP_ACPI_HKEY_VOLDWN_MASK |
1349 TP_ACPI_HKEY_MUTE_MASK,
1350 };
1351
1352 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1353 struct tp_nvram_state {
1354 u16 thinkpad_toggle:1;
1355 u16 zoom_toggle:1;
1356 u16 display_toggle:1;
1357 u16 thinklight_toggle:1;
1358 u16 hibernate_toggle:1;
1359 u16 displayexp_toggle:1;
1360 u16 display_state:1;
1361 u16 brightness_toggle:1;
1362 u16 volume_toggle:1;
1363 u16 mute:1;
1364
1365 u8 brightness_level;
1366 u8 volume_level;
1367 };
1368
1369 static struct task_struct *tpacpi_hotkey_task;
1370 static u32 hotkey_source_mask; /* bit mask 0=ACPI,1=NVRAM */
1371 static int hotkey_poll_freq = 10; /* Hz */
1372 static struct mutex hotkey_thread_mutex;
1373 static struct mutex hotkey_thread_data_mutex;
1374 static unsigned int hotkey_config_change;
1375
1376 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1377
1378 #define hotkey_source_mask 0U
1379
1380 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1381
1382 static struct mutex hotkey_mutex;
1383
1384 static enum { /* Reasons for waking up */
1385 TP_ACPI_WAKEUP_NONE = 0, /* None or unknown */
1386 TP_ACPI_WAKEUP_BAYEJ, /* Bay ejection request */
1387 TP_ACPI_WAKEUP_UNDOCK, /* Undock request */
1388 } hotkey_wakeup_reason;
1389
1390 static int hotkey_autosleep_ack;
1391
1392 static int hotkey_orig_status;
1393 static u32 hotkey_orig_mask;
1394 static u32 hotkey_all_mask;
1395 static u32 hotkey_reserved_mask;
1396 static u32 hotkey_mask;
1397
1398 static unsigned int hotkey_report_mode;
1399
1400 static u16 *hotkey_keycode_map;
1401
1402 static struct attribute_set *hotkey_dev_attributes;
1403
1404 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1405 #define HOTKEY_CONFIG_CRITICAL_START \
1406 do { \
1407 mutex_lock(&hotkey_thread_data_mutex); \
1408 hotkey_config_change++; \
1409 } while (0);
1410 #define HOTKEY_CONFIG_CRITICAL_END \
1411 mutex_unlock(&hotkey_thread_data_mutex);
1412 #else
1413 #define HOTKEY_CONFIG_CRITICAL_START
1414 #define HOTKEY_CONFIG_CRITICAL_END
1415 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1416
1417 /* HKEY.MHKG() return bits */
1418 #define TP_HOTKEY_TABLET_MASK (1 << 3)
1419
1420 static int hotkey_get_wlsw(int *status)
1421 {
1422 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
1423 if (dbg_wlswemul) {
1424 *status = !!tpacpi_wlsw_emulstate;
1425 return 0;
1426 }
1427 #endif
1428 if (!acpi_evalf(hkey_handle, status, "WLSW", "d"))
1429 return -EIO;
1430 return 0;
1431 }
1432
1433 static int hotkey_get_tablet_mode(int *status)
1434 {
1435 int s;
1436
1437 if (!acpi_evalf(hkey_handle, &s, "MHKG", "d"))
1438 return -EIO;
1439
1440 *status = ((s & TP_HOTKEY_TABLET_MASK) != 0);
1441 return 0;
1442 }
1443
1444 /*
1445 * Call with hotkey_mutex held
1446 */
1447 static int hotkey_mask_get(void)
1448 {
1449 u32 m = 0;
1450
1451 if (tp_features.hotkey_mask) {
1452 if (!acpi_evalf(hkey_handle, &m, "DHKN", "d"))
1453 return -EIO;
1454 }
1455 hotkey_mask = m | (hotkey_source_mask & hotkey_mask);
1456
1457 return 0;
1458 }
1459
1460 /*
1461 * Call with hotkey_mutex held
1462 */
1463 static int hotkey_mask_set(u32 mask)
1464 {
1465 int i;
1466 int rc = 0;
1467
1468 if (tp_features.hotkey_mask) {
1469 if (!tp_warned.hotkey_mask_ff &&
1470 (mask == 0xffff || mask == 0xffffff ||
1471 mask == 0xffffffff)) {
1472 tp_warned.hotkey_mask_ff = 1;
1473 printk(TPACPI_NOTICE
1474 "setting the hotkey mask to 0x%08x is likely "
1475 "not the best way to go about it\n", mask);
1476 printk(TPACPI_NOTICE
1477 "please consider using the driver defaults, "
1478 "and refer to up-to-date thinkpad-acpi "
1479 "documentation\n");
1480 }
1481
1482 HOTKEY_CONFIG_CRITICAL_START
1483 for (i = 0; i < 32; i++) {
1484 u32 m = 1 << i;
1485 /* enable in firmware mask only keys not in NVRAM
1486 * mode, but enable the key in the cached hotkey_mask
1487 * regardless of mode, or the key will end up
1488 * disabled by hotkey_mask_get() */
1489 if (!acpi_evalf(hkey_handle,
1490 NULL, "MHKM", "vdd", i + 1,
1491 !!((mask & ~hotkey_source_mask) & m))) {
1492 rc = -EIO;
1493 break;
1494 } else {
1495 hotkey_mask = (hotkey_mask & ~m) | (mask & m);
1496 }
1497 }
1498 HOTKEY_CONFIG_CRITICAL_END
1499
1500 /* hotkey_mask_get must be called unconditionally below */
1501 if (!hotkey_mask_get() && !rc &&
1502 (hotkey_mask & ~hotkey_source_mask) !=
1503 (mask & ~hotkey_source_mask)) {
1504 printk(TPACPI_NOTICE
1505 "requested hot key mask 0x%08x, but "
1506 "firmware forced it to 0x%08x\n",
1507 mask, hotkey_mask);
1508 }
1509 } else {
1510 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1511 HOTKEY_CONFIG_CRITICAL_START
1512 hotkey_mask = mask & hotkey_source_mask;
1513 HOTKEY_CONFIG_CRITICAL_END
1514 hotkey_mask_get();
1515 if (hotkey_mask != mask) {
1516 printk(TPACPI_NOTICE
1517 "requested hot key mask 0x%08x, "
1518 "forced to 0x%08x (NVRAM poll mask is "
1519 "0x%08x): no firmware mask support\n",
1520 mask, hotkey_mask, hotkey_source_mask);
1521 }
1522 #else
1523 hotkey_mask_get();
1524 rc = -ENXIO;
1525 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1526 }
1527
1528 return rc;
1529 }
1530
1531 static int hotkey_status_get(int *status)
1532 {
1533 if (!acpi_evalf(hkey_handle, status, "DHKC", "d"))
1534 return -EIO;
1535
1536 return 0;
1537 }
1538
1539 static int hotkey_status_set(int status)
1540 {
1541 if (!acpi_evalf(hkey_handle, NULL, "MHKC", "vd", status))
1542 return -EIO;
1543
1544 return 0;
1545 }
1546
1547 static void tpacpi_input_send_tabletsw(void)
1548 {
1549 int state;
1550
1551 if (tp_features.hotkey_tablet &&
1552 !hotkey_get_tablet_mode(&state)) {
1553 mutex_lock(&tpacpi_inputdev_send_mutex);
1554
1555 input_report_switch(tpacpi_inputdev,
1556 SW_TABLET_MODE, !!state);
1557 input_sync(tpacpi_inputdev);
1558
1559 mutex_unlock(&tpacpi_inputdev_send_mutex);
1560 }
1561 }
1562
1563 static void tpacpi_input_send_key(unsigned int scancode)
1564 {
1565 unsigned int keycode;
1566
1567 keycode = hotkey_keycode_map[scancode];
1568
1569 if (keycode != KEY_RESERVED) {
1570 mutex_lock(&tpacpi_inputdev_send_mutex);
1571
1572 input_report_key(tpacpi_inputdev, keycode, 1);
1573 if (keycode == KEY_UNKNOWN)
1574 input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN,
1575 scancode);
1576 input_sync(tpacpi_inputdev);
1577
1578 input_report_key(tpacpi_inputdev, keycode, 0);
1579 if (keycode == KEY_UNKNOWN)
1580 input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN,
1581 scancode);
1582 input_sync(tpacpi_inputdev);
1583
1584 mutex_unlock(&tpacpi_inputdev_send_mutex);
1585 }
1586 }
1587
1588 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1589 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver;
1590
1591 static void tpacpi_hotkey_send_key(unsigned int scancode)
1592 {
1593 tpacpi_input_send_key(scancode);
1594 if (hotkey_report_mode < 2) {
1595 acpi_bus_generate_proc_event(ibm_hotkey_acpidriver.device,
1596 0x80, 0x1001 + scancode);
1597 }
1598 }
1599
1600 static void hotkey_read_nvram(struct tp_nvram_state *n, u32 m)
1601 {
1602 u8 d;
1603
1604 if (m & TP_NVRAM_HKEY_GROUP_HK2) {
1605 d = nvram_read_byte(TP_NVRAM_ADDR_HK2);
1606 n->thinkpad_toggle = !!(d & TP_NVRAM_MASK_HKT_THINKPAD);
1607 n->zoom_toggle = !!(d & TP_NVRAM_MASK_HKT_ZOOM);
1608 n->display_toggle = !!(d & TP_NVRAM_MASK_HKT_DISPLAY);
1609 n->hibernate_toggle = !!(d & TP_NVRAM_MASK_HKT_HIBERNATE);
1610 }
1611 if (m & TP_ACPI_HKEY_THNKLGHT_MASK) {
1612 d = nvram_read_byte(TP_NVRAM_ADDR_THINKLIGHT);
1613 n->thinklight_toggle = !!(d & TP_NVRAM_MASK_THINKLIGHT);
1614 }
1615 if (m & TP_ACPI_HKEY_DISPXPAND_MASK) {
1616 d = nvram_read_byte(TP_NVRAM_ADDR_VIDEO);
1617 n->displayexp_toggle =
1618 !!(d & TP_NVRAM_MASK_HKT_DISPEXPND);
1619 }
1620 if (m & TP_NVRAM_HKEY_GROUP_BRIGHTNESS) {
1621 d = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS);
1622 n->brightness_level = (d & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
1623 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
1624 n->brightness_toggle =
1625 !!(d & TP_NVRAM_MASK_HKT_BRIGHTNESS);
1626 }
1627 if (m & TP_NVRAM_HKEY_GROUP_VOLUME) {
1628 d = nvram_read_byte(TP_NVRAM_ADDR_MIXER);
1629 n->volume_level = (d & TP_NVRAM_MASK_LEVEL_VOLUME)
1630 >> TP_NVRAM_POS_LEVEL_VOLUME;
1631 n->mute = !!(d & TP_NVRAM_MASK_MUTE);
1632 n->volume_toggle = !!(d & TP_NVRAM_MASK_HKT_VOLUME);
1633 }
1634 }
1635
1636 #define TPACPI_COMPARE_KEY(__scancode, __member) \
1637 do { \
1638 if ((mask & (1 << __scancode)) && \
1639 oldn->__member != newn->__member) \
1640 tpacpi_hotkey_send_key(__scancode); \
1641 } while (0)
1642
1643 #define TPACPI_MAY_SEND_KEY(__scancode) \
1644 do { if (mask & (1 << __scancode)) \
1645 tpacpi_hotkey_send_key(__scancode); } while (0)
1646
1647 static void hotkey_compare_and_issue_event(struct tp_nvram_state *oldn,
1648 struct tp_nvram_state *newn,
1649 u32 mask)
1650 {
1651 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_THINKPAD, thinkpad_toggle);
1652 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNSPACE, zoom_toggle);
1653 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF7, display_toggle);
1654 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF12, hibernate_toggle);
1655
1656 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNPAGEUP, thinklight_toggle);
1657
1658 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF8, displayexp_toggle);
1659
1660 /* handle volume */
1661 if (oldn->volume_toggle != newn->volume_toggle) {
1662 if (oldn->mute != newn->mute) {
1663 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE);
1664 }
1665 if (oldn->volume_level > newn->volume_level) {
1666 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
1667 } else if (oldn->volume_level < newn->volume_level) {
1668 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
1669 } else if (oldn->mute == newn->mute) {
1670 /* repeated key presses that didn't change state */
1671 if (newn->mute) {
1672 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE);
1673 } else if (newn->volume_level != 0) {
1674 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
1675 } else {
1676 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
1677 }
1678 }
1679 }
1680
1681 /* handle brightness */
1682 if (oldn->brightness_toggle != newn->brightness_toggle) {
1683 if (oldn->brightness_level < newn->brightness_level) {
1684 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
1685 } else if (oldn->brightness_level > newn->brightness_level) {
1686 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
1687 } else {
1688 /* repeated key presses that didn't change state */
1689 if (newn->brightness_level != 0) {
1690 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
1691 } else {
1692 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
1693 }
1694 }
1695 }
1696 }
1697
1698 #undef TPACPI_COMPARE_KEY
1699 #undef TPACPI_MAY_SEND_KEY
1700
1701 static int hotkey_kthread(void *data)
1702 {
1703 struct tp_nvram_state s[2];
1704 u32 mask;
1705 unsigned int si, so;
1706 unsigned long t;
1707 unsigned int change_detector, must_reset;
1708
1709 mutex_lock(&hotkey_thread_mutex);
1710
1711 if (tpacpi_lifecycle == TPACPI_LIFE_EXITING)
1712 goto exit;
1713
1714 set_freezable();
1715
1716 so = 0;
1717 si = 1;
1718 t = 0;
1719
1720 /* Initial state for compares */
1721 mutex_lock(&hotkey_thread_data_mutex);
1722 change_detector = hotkey_config_change;
1723 mask = hotkey_source_mask & hotkey_mask;
1724 mutex_unlock(&hotkey_thread_data_mutex);
1725 hotkey_read_nvram(&s[so], mask);
1726
1727 while (!kthread_should_stop() && hotkey_poll_freq) {
1728 if (t == 0)
1729 t = 1000/hotkey_poll_freq;
1730 t = msleep_interruptible(t);
1731 if (unlikely(kthread_should_stop()))
1732 break;
1733 must_reset = try_to_freeze();
1734 if (t > 0 && !must_reset)
1735 continue;
1736
1737 mutex_lock(&hotkey_thread_data_mutex);
1738 if (must_reset || hotkey_config_change != change_detector) {
1739 /* forget old state on thaw or config change */
1740 si = so;
1741 t = 0;
1742 change_detector = hotkey_config_change;
1743 }
1744 mask = hotkey_source_mask & hotkey_mask;
1745 mutex_unlock(&hotkey_thread_data_mutex);
1746
1747 if (likely(mask)) {
1748 hotkey_read_nvram(&s[si], mask);
1749 if (likely(si != so)) {
1750 hotkey_compare_and_issue_event(&s[so], &s[si],
1751 mask);
1752 }
1753 }
1754
1755 so = si;
1756 si ^= 1;
1757 }
1758
1759 exit:
1760 mutex_unlock(&hotkey_thread_mutex);
1761 return 0;
1762 }
1763
1764 static void hotkey_poll_stop_sync(void)
1765 {
1766 if (tpacpi_hotkey_task) {
1767 if (frozen(tpacpi_hotkey_task) ||
1768 freezing(tpacpi_hotkey_task))
1769 thaw_process(tpacpi_hotkey_task);
1770
1771 kthread_stop(tpacpi_hotkey_task);
1772 tpacpi_hotkey_task = NULL;
1773 mutex_lock(&hotkey_thread_mutex);
1774 /* at this point, the thread did exit */
1775 mutex_unlock(&hotkey_thread_mutex);
1776 }
1777 }
1778
1779 /* call with hotkey_mutex held */
1780 static void hotkey_poll_setup(int may_warn)
1781 {
1782 if ((hotkey_source_mask & hotkey_mask) != 0 &&
1783 hotkey_poll_freq > 0 &&
1784 (tpacpi_inputdev->users > 0 || hotkey_report_mode < 2)) {
1785 if (!tpacpi_hotkey_task) {
1786 tpacpi_hotkey_task = kthread_run(hotkey_kthread,
1787 NULL, TPACPI_NVRAM_KTHREAD_NAME);
1788 if (IS_ERR(tpacpi_hotkey_task)) {
1789 tpacpi_hotkey_task = NULL;
1790 printk(TPACPI_ERR
1791 "could not create kernel thread "
1792 "for hotkey polling\n");
1793 }
1794 }
1795 } else {
1796 hotkey_poll_stop_sync();
1797 if (may_warn &&
1798 hotkey_source_mask != 0 && hotkey_poll_freq == 0) {
1799 printk(TPACPI_NOTICE
1800 "hot keys 0x%08x require polling, "
1801 "which is currently disabled\n",
1802 hotkey_source_mask);
1803 }
1804 }
1805 }
1806
1807 static void hotkey_poll_setup_safe(int may_warn)
1808 {
1809 mutex_lock(&hotkey_mutex);
1810 hotkey_poll_setup(may_warn);
1811 mutex_unlock(&hotkey_mutex);
1812 }
1813
1814 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1815
1816 static void hotkey_poll_setup_safe(int __unused)
1817 {
1818 }
1819
1820 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1821
1822 static int hotkey_inputdev_open(struct input_dev *dev)
1823 {
1824 switch (tpacpi_lifecycle) {
1825 case TPACPI_LIFE_INIT:
1826 /*
1827 * hotkey_init will call hotkey_poll_setup_safe
1828 * at the appropriate moment
1829 */
1830 return 0;
1831 case TPACPI_LIFE_EXITING:
1832 return -EBUSY;
1833 case TPACPI_LIFE_RUNNING:
1834 hotkey_poll_setup_safe(0);
1835 return 0;
1836 }
1837
1838 /* Should only happen if tpacpi_lifecycle is corrupt */
1839 BUG();
1840 return -EBUSY;
1841 }
1842
1843 static void hotkey_inputdev_close(struct input_dev *dev)
1844 {
1845 /* disable hotkey polling when possible */
1846 if (tpacpi_lifecycle == TPACPI_LIFE_RUNNING)
1847 hotkey_poll_setup_safe(0);
1848 }
1849
1850 /* sysfs hotkey enable ------------------------------------------------- */
1851 static ssize_t hotkey_enable_show(struct device *dev,
1852 struct device_attribute *attr,
1853 char *buf)
1854 {
1855 int res, status;
1856
1857 res = hotkey_status_get(&status);
1858 if (res)
1859 return res;
1860
1861 return snprintf(buf, PAGE_SIZE, "%d\n", status);
1862 }
1863
1864 static ssize_t hotkey_enable_store(struct device *dev,
1865 struct device_attribute *attr,
1866 const char *buf, size_t count)
1867 {
1868 unsigned long t;
1869 int res;
1870
1871 if (parse_strtoul(buf, 1, &t))
1872 return -EINVAL;
1873
1874 res = hotkey_status_set(t);
1875
1876 return (res) ? res : count;
1877 }
1878
1879 static struct device_attribute dev_attr_hotkey_enable =
1880 __ATTR(hotkey_enable, S_IWUSR | S_IRUGO,
1881 hotkey_enable_show, hotkey_enable_store);
1882
1883 /* sysfs hotkey mask --------------------------------------------------- */
1884 static ssize_t hotkey_mask_show(struct device *dev,
1885 struct device_attribute *attr,
1886 char *buf)
1887 {
1888 int res;
1889
1890 if (mutex_lock_killable(&hotkey_mutex))
1891 return -ERESTARTSYS;
1892 res = hotkey_mask_get();
1893 mutex_unlock(&hotkey_mutex);
1894
1895 return (res)?
1896 res : snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_mask);
1897 }
1898
1899 static ssize_t hotkey_mask_store(struct device *dev,
1900 struct device_attribute *attr,
1901 const char *buf, size_t count)
1902 {
1903 unsigned long t;
1904 int res;
1905
1906 if (parse_strtoul(buf, 0xffffffffUL, &t))
1907 return -EINVAL;
1908
1909 if (mutex_lock_killable(&hotkey_mutex))
1910 return -ERESTARTSYS;
1911
1912 res = hotkey_mask_set(t);
1913
1914 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1915 hotkey_poll_setup(1);
1916 #endif
1917
1918 mutex_unlock(&hotkey_mutex);
1919
1920 return (res) ? res : count;
1921 }
1922
1923 static struct device_attribute dev_attr_hotkey_mask =
1924 __ATTR(hotkey_mask, S_IWUSR | S_IRUGO,
1925 hotkey_mask_show, hotkey_mask_store);
1926
1927 /* sysfs hotkey bios_enabled ------------------------------------------- */
1928 static ssize_t hotkey_bios_enabled_show(struct device *dev,
1929 struct device_attribute *attr,
1930 char *buf)
1931 {
1932 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_orig_status);
1933 }
1934
1935 static struct device_attribute dev_attr_hotkey_bios_enabled =
1936 __ATTR(hotkey_bios_enabled, S_IRUGO, hotkey_bios_enabled_show, NULL);
1937
1938 /* sysfs hotkey bios_mask ---------------------------------------------- */
1939 static ssize_t hotkey_bios_mask_show(struct device *dev,
1940 struct device_attribute *attr,
1941 char *buf)
1942 {
1943 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_orig_mask);
1944 }
1945
1946 static struct device_attribute dev_attr_hotkey_bios_mask =
1947 __ATTR(hotkey_bios_mask, S_IRUGO, hotkey_bios_mask_show, NULL);
1948
1949 /* sysfs hotkey all_mask ----------------------------------------------- */
1950 static ssize_t hotkey_all_mask_show(struct device *dev,
1951 struct device_attribute *attr,
1952 char *buf)
1953 {
1954 return snprintf(buf, PAGE_SIZE, "0x%08x\n",
1955 hotkey_all_mask | hotkey_source_mask);
1956 }
1957
1958 static struct device_attribute dev_attr_hotkey_all_mask =
1959 __ATTR(hotkey_all_mask, S_IRUGO, hotkey_all_mask_show, NULL);
1960
1961 /* sysfs hotkey recommended_mask --------------------------------------- */
1962 static ssize_t hotkey_recommended_mask_show(struct device *dev,
1963 struct device_attribute *attr,
1964 char *buf)
1965 {
1966 return snprintf(buf, PAGE_SIZE, "0x%08x\n",
1967 (hotkey_all_mask | hotkey_source_mask)
1968 & ~hotkey_reserved_mask);
1969 }
1970
1971 static struct device_attribute dev_attr_hotkey_recommended_mask =
1972 __ATTR(hotkey_recommended_mask, S_IRUGO,
1973 hotkey_recommended_mask_show, NULL);
1974
1975 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1976
1977 /* sysfs hotkey hotkey_source_mask ------------------------------------- */
1978 static ssize_t hotkey_source_mask_show(struct device *dev,
1979 struct device_attribute *attr,
1980 char *buf)
1981 {
1982 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_source_mask);
1983 }
1984
1985 static ssize_t hotkey_source_mask_store(struct device *dev,
1986 struct device_attribute *attr,
1987 const char *buf, size_t count)
1988 {
1989 unsigned long t;
1990
1991 if (parse_strtoul(buf, 0xffffffffUL, &t) ||
1992 ((t & ~TPACPI_HKEY_NVRAM_KNOWN_MASK) != 0))
1993 return -EINVAL;
1994
1995 if (mutex_lock_killable(&hotkey_mutex))
1996 return -ERESTARTSYS;
1997
1998 HOTKEY_CONFIG_CRITICAL_START
1999 hotkey_source_mask = t;
2000 HOTKEY_CONFIG_CRITICAL_END
2001
2002 hotkey_poll_setup(1);
2003
2004 mutex_unlock(&hotkey_mutex);
2005
2006 return count;
2007 }
2008
2009 static struct device_attribute dev_attr_hotkey_source_mask =
2010 __ATTR(hotkey_source_mask, S_IWUSR | S_IRUGO,
2011 hotkey_source_mask_show, hotkey_source_mask_store);
2012
2013 /* sysfs hotkey hotkey_poll_freq --------------------------------------- */
2014 static ssize_t hotkey_poll_freq_show(struct device *dev,
2015 struct device_attribute *attr,
2016 char *buf)
2017 {
2018 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_poll_freq);
2019 }
2020
2021 static ssize_t hotkey_poll_freq_store(struct device *dev,
2022 struct device_attribute *attr,
2023 const char *buf, size_t count)
2024 {
2025 unsigned long t;
2026
2027 if (parse_strtoul(buf, 25, &t))
2028 return -EINVAL;
2029
2030 if (mutex_lock_killable(&hotkey_mutex))
2031 return -ERESTARTSYS;
2032
2033 hotkey_poll_freq = t;
2034
2035 hotkey_poll_setup(1);
2036 mutex_unlock(&hotkey_mutex);
2037
2038 return count;
2039 }
2040
2041 static struct device_attribute dev_attr_hotkey_poll_freq =
2042 __ATTR(hotkey_poll_freq, S_IWUSR | S_IRUGO,
2043 hotkey_poll_freq_show, hotkey_poll_freq_store);
2044
2045 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2046
2047 /* sysfs hotkey radio_sw (pollable) ------------------------------------ */
2048 static ssize_t hotkey_radio_sw_show(struct device *dev,
2049 struct device_attribute *attr,
2050 char *buf)
2051 {
2052 int res, s;
2053 res = hotkey_get_wlsw(&s);
2054 if (res < 0)
2055 return res;
2056
2057 return snprintf(buf, PAGE_SIZE, "%d\n", !!s);
2058 }
2059
2060 static struct device_attribute dev_attr_hotkey_radio_sw =
2061 __ATTR(hotkey_radio_sw, S_IRUGO, hotkey_radio_sw_show, NULL);
2062
2063 static void hotkey_radio_sw_notify_change(void)
2064 {
2065 if (tp_features.hotkey_wlsw)
2066 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2067 "hotkey_radio_sw");
2068 }
2069
2070 /* sysfs hotkey tablet mode (pollable) --------------------------------- */
2071 static ssize_t hotkey_tablet_mode_show(struct device *dev,
2072 struct device_attribute *attr,
2073 char *buf)
2074 {
2075 int res, s;
2076 res = hotkey_get_tablet_mode(&s);
2077 if (res < 0)
2078 return res;
2079
2080 return snprintf(buf, PAGE_SIZE, "%d\n", !!s);
2081 }
2082
2083 static struct device_attribute dev_attr_hotkey_tablet_mode =
2084 __ATTR(hotkey_tablet_mode, S_IRUGO, hotkey_tablet_mode_show, NULL);
2085
2086 static void hotkey_tablet_mode_notify_change(void)
2087 {
2088 if (tp_features.hotkey_tablet)
2089 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2090 "hotkey_tablet_mode");
2091 }
2092
2093 /* sysfs hotkey report_mode -------------------------------------------- */
2094 static ssize_t hotkey_report_mode_show(struct device *dev,
2095 struct device_attribute *attr,
2096 char *buf)
2097 {
2098 return snprintf(buf, PAGE_SIZE, "%d\n",
2099 (hotkey_report_mode != 0) ? hotkey_report_mode : 1);
2100 }
2101
2102 static struct device_attribute dev_attr_hotkey_report_mode =
2103 __ATTR(hotkey_report_mode, S_IRUGO, hotkey_report_mode_show, NULL);
2104
2105 /* sysfs wakeup reason (pollable) -------------------------------------- */
2106 static ssize_t hotkey_wakeup_reason_show(struct device *dev,
2107 struct device_attribute *attr,
2108 char *buf)
2109 {
2110 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_wakeup_reason);
2111 }
2112
2113 static struct device_attribute dev_attr_hotkey_wakeup_reason =
2114 __ATTR(wakeup_reason, S_IRUGO, hotkey_wakeup_reason_show, NULL);
2115
2116 static void hotkey_wakeup_reason_notify_change(void)
2117 {
2118 if (tp_features.hotkey_mask)
2119 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2120 "wakeup_reason");
2121 }
2122
2123 /* sysfs wakeup hotunplug_complete (pollable) -------------------------- */
2124 static ssize_t hotkey_wakeup_hotunplug_complete_show(struct device *dev,
2125 struct device_attribute *attr,
2126 char *buf)
2127 {
2128 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_autosleep_ack);
2129 }
2130
2131 static struct device_attribute dev_attr_hotkey_wakeup_hotunplug_complete =
2132 __ATTR(wakeup_hotunplug_complete, S_IRUGO,
2133 hotkey_wakeup_hotunplug_complete_show, NULL);
2134
2135 static void hotkey_wakeup_hotunplug_complete_notify_change(void)
2136 {
2137 if (tp_features.hotkey_mask)
2138 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2139 "wakeup_hotunplug_complete");
2140 }
2141
2142 /* --------------------------------------------------------------------- */
2143
2144 static struct attribute *hotkey_attributes[] __initdata = {
2145 &dev_attr_hotkey_enable.attr,
2146 &dev_attr_hotkey_bios_enabled.attr,
2147 &dev_attr_hotkey_report_mode.attr,
2148 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2149 &dev_attr_hotkey_mask.attr,
2150 &dev_attr_hotkey_all_mask.attr,
2151 &dev_attr_hotkey_recommended_mask.attr,
2152 &dev_attr_hotkey_source_mask.attr,
2153 &dev_attr_hotkey_poll_freq.attr,
2154 #endif
2155 };
2156
2157 static struct attribute *hotkey_mask_attributes[] __initdata = {
2158 &dev_attr_hotkey_bios_mask.attr,
2159 #ifndef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2160 &dev_attr_hotkey_mask.attr,
2161 &dev_attr_hotkey_all_mask.attr,
2162 &dev_attr_hotkey_recommended_mask.attr,
2163 #endif
2164 &dev_attr_hotkey_wakeup_reason.attr,
2165 &dev_attr_hotkey_wakeup_hotunplug_complete.attr,
2166 };
2167
2168 static void bluetooth_update_rfk(void);
2169 static void wan_update_rfk(void);
2170 static void uwb_update_rfk(void);
2171 static void tpacpi_send_radiosw_update(void)
2172 {
2173 int wlsw;
2174
2175 /* Sync these BEFORE sending any rfkill events */
2176 if (tp_features.bluetooth)
2177 bluetooth_update_rfk();
2178 if (tp_features.wan)
2179 wan_update_rfk();
2180 if (tp_features.uwb)
2181 uwb_update_rfk();
2182
2183 if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&wlsw)) {
2184 mutex_lock(&tpacpi_inputdev_send_mutex);
2185
2186 input_report_switch(tpacpi_inputdev,
2187 SW_RFKILL_ALL, !!wlsw);
2188 input_sync(tpacpi_inputdev);
2189
2190 mutex_unlock(&tpacpi_inputdev_send_mutex);
2191 }
2192 hotkey_radio_sw_notify_change();
2193 }
2194
2195 static void hotkey_exit(void)
2196 {
2197 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2198 hotkey_poll_stop_sync();
2199 #endif
2200
2201 if (hotkey_dev_attributes)
2202 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
2203
2204 kfree(hotkey_keycode_map);
2205
2206 if (tp_features.hotkey) {
2207 dbg_printk(TPACPI_DBG_EXIT,
2208 "restoring original hot key mask\n");
2209 /* no short-circuit boolean operator below! */
2210 if ((hotkey_mask_set(hotkey_orig_mask) |
2211 hotkey_status_set(hotkey_orig_status)) != 0)
2212 printk(TPACPI_ERR
2213 "failed to restore hot key mask "
2214 "to BIOS defaults\n");
2215 }
2216 }
2217
2218 static int __init hotkey_init(struct ibm_init_struct *iibm)
2219 {
2220 /* Requirements for changing the default keymaps:
2221 *
2222 * 1. Many of the keys are mapped to KEY_RESERVED for very
2223 * good reasons. Do not change them unless you have deep
2224 * knowledge on the IBM and Lenovo ThinkPad firmware for
2225 * the various ThinkPad models. The driver behaves
2226 * differently for KEY_RESERVED: such keys have their
2227 * hot key mask *unset* in mask_recommended, and also
2228 * in the initial hot key mask programmed into the
2229 * firmware at driver load time, which means the firm-
2230 * ware may react very differently if you change them to
2231 * something else;
2232 *
2233 * 2. You must be subscribed to the linux-thinkpad and
2234 * ibm-acpi-devel mailing lists, and you should read the
2235 * list archives since 2007 if you want to change the
2236 * keymaps. This requirement exists so that you will
2237 * know the past history of problems with the thinkpad-
2238 * acpi driver keymaps, and also that you will be
2239 * listening to any bug reports;
2240 *
2241 * 3. Do not send thinkpad-acpi specific patches directly to
2242 * for merging, *ever*. Send them to the linux-acpi
2243 * mailinglist for comments. Merging is to be done only
2244 * through acpi-test and the ACPI maintainer.
2245 *
2246 * If the above is too much to ask, don't change the keymap.
2247 * Ask the thinkpad-acpi maintainer to do it, instead.
2248 */
2249 static u16 ibm_keycode_map[] __initdata = {
2250 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
2251 KEY_FN_F1, KEY_FN_F2, KEY_COFFEE, KEY_SLEEP,
2252 KEY_WLAN, KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
2253 KEY_FN_F9, KEY_FN_F10, KEY_FN_F11, KEY_SUSPEND,
2254
2255 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
2256 KEY_UNKNOWN, /* 0x0C: FN+BACKSPACE */
2257 KEY_UNKNOWN, /* 0x0D: FN+INSERT */
2258 KEY_UNKNOWN, /* 0x0E: FN+DELETE */
2259
2260 /* brightness: firmware always reacts to them, unless
2261 * X.org did some tricks in the radeon BIOS scratch
2262 * registers of *some* models */
2263 KEY_RESERVED, /* 0x0F: FN+HOME (brightness up) */
2264 KEY_RESERVED, /* 0x10: FN+END (brightness down) */
2265
2266 /* Thinklight: firmware always react to it */
2267 KEY_RESERVED, /* 0x11: FN+PGUP (thinklight toggle) */
2268
2269 KEY_UNKNOWN, /* 0x12: FN+PGDOWN */
2270 KEY_ZOOM, /* 0x13: FN+SPACE (zoom) */
2271
2272 /* Volume: firmware always react to it and reprograms
2273 * the built-in *extra* mixer. Never map it to control
2274 * another mixer by default. */
2275 KEY_RESERVED, /* 0x14: VOLUME UP */
2276 KEY_RESERVED, /* 0x15: VOLUME DOWN */
2277 KEY_RESERVED, /* 0x16: MUTE */
2278
2279 KEY_VENDOR, /* 0x17: Thinkpad/AccessIBM/Lenovo */
2280
2281 /* (assignments unknown, please report if found) */
2282 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
2283 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
2284 };
2285 static u16 lenovo_keycode_map[] __initdata = {
2286 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
2287 KEY_FN_F1, KEY_COFFEE, KEY_BATTERY, KEY_SLEEP,
2288 KEY_WLAN, KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
2289 KEY_FN_F9, KEY_FN_F10, KEY_FN_F11, KEY_SUSPEND,
2290
2291 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
2292 KEY_UNKNOWN, /* 0x0C: FN+BACKSPACE */
2293 KEY_UNKNOWN, /* 0x0D: FN+INSERT */
2294 KEY_UNKNOWN, /* 0x0E: FN+DELETE */
2295
2296 /* These either have to go through ACPI video, or
2297 * act like in the IBM ThinkPads, so don't ever
2298 * enable them by default */
2299 KEY_RESERVED, /* 0x0F: FN+HOME (brightness up) */
2300 KEY_RESERVED, /* 0x10: FN+END (brightness down) */
2301
2302 KEY_RESERVED, /* 0x11: FN+PGUP (thinklight toggle) */
2303
2304 KEY_UNKNOWN, /* 0x12: FN+PGDOWN */
2305 KEY_ZOOM, /* 0x13: FN+SPACE (zoom) */
2306
2307 /* Volume: z60/z61, T60 (BIOS version?): firmware always
2308 * react to it and reprograms the built-in *extra* mixer.
2309 * Never map it to control another mixer by default.
2310 *
2311 * T60?, T61, R60?, R61: firmware and EC tries to send
2312 * these over the regular keyboard, so these are no-ops,
2313 * but there are still weird bugs re. MUTE, so do not
2314 * change unless you get test reports from all Lenovo
2315 * models. May cause the BIOS to interfere with the
2316 * HDA mixer.
2317 */
2318 KEY_RESERVED, /* 0x14: VOLUME UP */
2319 KEY_RESERVED, /* 0x15: VOLUME DOWN */
2320 KEY_RESERVED, /* 0x16: MUTE */
2321
2322 KEY_VENDOR, /* 0x17: Thinkpad/AccessIBM/Lenovo */
2323
2324 /* (assignments unknown, please report if found) */
2325 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
2326 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
2327 };
2328
2329 #define TPACPI_HOTKEY_MAP_LEN ARRAY_SIZE(ibm_keycode_map)
2330 #define TPACPI_HOTKEY_MAP_SIZE sizeof(ibm_keycode_map)
2331 #define TPACPI_HOTKEY_MAP_TYPESIZE sizeof(ibm_keycode_map[0])
2332
2333 int res, i;
2334 int status;
2335 int hkeyv;
2336
2337 vdbg_printk(TPACPI_DBG_INIT, "initializing hotkey subdriver\n");
2338
2339 BUG_ON(!tpacpi_inputdev);
2340 BUG_ON(tpacpi_inputdev->open != NULL ||
2341 tpacpi_inputdev->close != NULL);
2342
2343 TPACPI_ACPIHANDLE_INIT(hkey);
2344 mutex_init(&hotkey_mutex);
2345
2346 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2347 mutex_init(&hotkey_thread_mutex);
2348 mutex_init(&hotkey_thread_data_mutex);
2349 #endif
2350
2351 /* hotkey not supported on 570 */
2352 tp_features.hotkey = hkey_handle != NULL;
2353
2354 vdbg_printk(TPACPI_DBG_INIT, "hotkeys are %s\n",
2355 str_supported(tp_features.hotkey));
2356
2357 if (!tp_features.hotkey)
2358 return 1;
2359
2360 tpacpi_disable_brightness_delay();
2361
2362 hotkey_dev_attributes = create_attr_set(13, NULL);
2363 if (!hotkey_dev_attributes)
2364 return -ENOMEM;
2365 res = add_many_to_attr_set(hotkey_dev_attributes,
2366 hotkey_attributes,
2367 ARRAY_SIZE(hotkey_attributes));
2368 if (res)
2369 goto err_exit;
2370
2371 /* mask not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
2372 A30, R30, R31, T20-22, X20-21, X22-24. Detected by checking
2373 for HKEY interface version 0x100 */
2374 if (acpi_evalf(hkey_handle, &hkeyv, "MHKV", "qd")) {
2375 if ((hkeyv >> 8) != 1) {
2376 printk(TPACPI_ERR "unknown version of the "
2377 "HKEY interface: 0x%x\n", hkeyv);
2378 printk(TPACPI_ERR "please report this to %s\n",
2379 TPACPI_MAIL);
2380 } else {
2381 /*
2382 * MHKV 0x100 in A31, R40, R40e,
2383 * T4x, X31, and later
2384 */
2385 tp_features.hotkey_mask = 1;
2386 }
2387 }
2388
2389 vdbg_printk(TPACPI_DBG_INIT, "hotkey masks are %s\n",
2390 str_supported(tp_features.hotkey_mask));
2391
2392 if (tp_features.hotkey_mask) {
2393 if (!acpi_evalf(hkey_handle, &hotkey_all_mask,
2394 "MHKA", "qd")) {
2395 printk(TPACPI_ERR
2396 "missing MHKA handler, "
2397 "please report this to %s\n",
2398 TPACPI_MAIL);
2399 /* FN+F12, FN+F4, FN+F3 */
2400 hotkey_all_mask = 0x080cU;
2401 }
2402 }
2403
2404 /* hotkey_source_mask *must* be zero for
2405 * the first hotkey_mask_get */
2406 res = hotkey_status_get(&hotkey_orig_status);
2407 if (res)
2408 goto err_exit;
2409
2410 if (tp_features.hotkey_mask) {
2411 res = hotkey_mask_get();
2412 if (res)
2413 goto err_exit;
2414
2415 hotkey_orig_mask = hotkey_mask;
2416 res = add_many_to_attr_set(
2417 hotkey_dev_attributes,
2418 hotkey_mask_attributes,
2419 ARRAY_SIZE(hotkey_mask_attributes));
2420 if (res)
2421 goto err_exit;
2422 }
2423
2424 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2425 if (tp_features.hotkey_mask) {
2426 hotkey_source_mask = TPACPI_HKEY_NVRAM_GOOD_MASK
2427 & ~hotkey_all_mask;
2428 } else {
2429 hotkey_source_mask = TPACPI_HKEY_NVRAM_GOOD_MASK;
2430 }
2431
2432 vdbg_printk(TPACPI_DBG_INIT,
2433 "hotkey source mask 0x%08x, polling freq %d\n",
2434 hotkey_source_mask, hotkey_poll_freq);
2435 #endif
2436
2437 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
2438 if (dbg_wlswemul) {
2439 tp_features.hotkey_wlsw = 1;
2440 printk(TPACPI_INFO
2441 "radio switch emulation enabled\n");
2442 } else
2443 #endif
2444 /* Not all thinkpads have a hardware radio switch */
2445 if (acpi_evalf(hkey_handle, &status, "WLSW", "qd")) {
2446 tp_features.hotkey_wlsw = 1;
2447 printk(TPACPI_INFO
2448 "radio switch found; radios are %s\n",
2449 enabled(status, 0));
2450 }
2451 if (tp_features.hotkey_wlsw)
2452 res = add_to_attr_set(hotkey_dev_attributes,
2453 &dev_attr_hotkey_radio_sw.attr);
2454
2455 /* For X41t, X60t, X61t Tablets... */
2456 if (!res && acpi_evalf(hkey_handle, &status, "MHKG", "qd")) {
2457 tp_features.hotkey_tablet = 1;
2458 printk(TPACPI_INFO
2459 "possible tablet mode switch found; "
2460 "ThinkPad in %s mode\n",
2461 (status & TP_HOTKEY_TABLET_MASK)?
2462 "tablet" : "laptop");
2463 res = add_to_attr_set(hotkey_dev_attributes,
2464 &dev_attr_hotkey_tablet_mode.attr);
2465 }
2466
2467 if (!res)
2468 res = register_attr_set_with_sysfs(
2469 hotkey_dev_attributes,
2470 &tpacpi_pdev->dev.kobj);
2471 if (res)
2472 goto err_exit;
2473
2474 /* Set up key map */
2475
2476 hotkey_keycode_map = kmalloc(TPACPI_HOTKEY_MAP_SIZE,
2477 GFP_KERNEL);
2478 if (!hotkey_keycode_map) {
2479 printk(TPACPI_ERR
2480 "failed to allocate memory for key map\n");
2481 res = -ENOMEM;
2482 goto err_exit;
2483 }
2484
2485 if (thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO) {
2486 dbg_printk(TPACPI_DBG_INIT,
2487 "using Lenovo default hot key map\n");
2488 memcpy(hotkey_keycode_map, &lenovo_keycode_map,
2489 TPACPI_HOTKEY_MAP_SIZE);
2490 } else {
2491 dbg_printk(TPACPI_DBG_INIT,
2492 "using IBM default hot key map\n");
2493 memcpy(hotkey_keycode_map, &ibm_keycode_map,
2494 TPACPI_HOTKEY_MAP_SIZE);
2495 }
2496
2497 set_bit(EV_KEY, tpacpi_inputdev->evbit);
2498 set_bit(EV_MSC, tpacpi_inputdev->evbit);
2499 set_bit(MSC_SCAN, tpacpi_inputdev->mscbit);
2500 tpacpi_inputdev->keycodesize = TPACPI_HOTKEY_MAP_TYPESIZE;
2501 tpacpi_inputdev->keycodemax = TPACPI_HOTKEY_MAP_LEN;
2502 tpacpi_inputdev->keycode = hotkey_keycode_map;
2503 for (i = 0; i < TPACPI_HOTKEY_MAP_LEN; i++) {
2504 if (hotkey_keycode_map[i] != KEY_RESERVED) {
2505 set_bit(hotkey_keycode_map[i],
2506 tpacpi_inputdev->keybit);
2507 } else {
2508 if (i < sizeof(hotkey_reserved_mask)*8)
2509 hotkey_reserved_mask |= 1 << i;
2510 }
2511 }
2512
2513 if (tp_features.hotkey_wlsw) {
2514 set_bit(EV_SW, tpacpi_inputdev->evbit);
2515 set_bit(SW_RFKILL_ALL, tpacpi_inputdev->swbit);
2516 }
2517 if (tp_features.hotkey_tablet) {
2518 set_bit(EV_SW, tpacpi_inputdev->evbit);
2519 set_bit(SW_TABLET_MODE, tpacpi_inputdev->swbit);
2520 }
2521
2522 /* Do not issue duplicate brightness change events to
2523 * userspace */
2524 if (!tp_features.bright_acpimode)
2525 /* update bright_acpimode... */
2526 tpacpi_check_std_acpi_brightness_support();
2527
2528 if (tp_features.bright_acpimode) {
2529 printk(TPACPI_INFO
2530 "This ThinkPad has standard ACPI backlight "
2531 "brightness control, supported by the ACPI "
2532 "video driver\n");
2533 printk(TPACPI_NOTICE
2534 "Disabling thinkpad-acpi brightness events "
2535 "by default...\n");
2536
2537 /* The hotkey_reserved_mask change below is not
2538 * necessary while the keys are at KEY_RESERVED in the
2539 * default map, but better safe than sorry, leave it
2540 * here as a marker of what we have to do, especially
2541 * when we finally become able to set this at runtime
2542 * on response to X.org requests */
2543 hotkey_reserved_mask |=
2544 (1 << TP_ACPI_HOTKEYSCAN_FNHOME)
2545 | (1 << TP_ACPI_HOTKEYSCAN_FNEND);
2546 }
2547
2548 dbg_printk(TPACPI_DBG_INIT, "enabling hot key handling\n");
2549 res = hotkey_status_set(1);
2550 if (res) {
2551 hotkey_exit();
2552 return res;
2553 }
2554 res = hotkey_mask_set(((hotkey_all_mask | hotkey_source_mask)
2555 & ~hotkey_reserved_mask)
2556 | hotkey_orig_mask);
2557 if (res < 0 && res != -ENXIO) {
2558 hotkey_exit();
2559 return res;
2560 }
2561
2562 dbg_printk(TPACPI_DBG_INIT,
2563 "legacy hot key reporting over procfs %s\n",
2564 (hotkey_report_mode < 2) ?
2565 "enabled" : "disabled");
2566
2567 tpacpi_inputdev->open = &hotkey_inputdev_open;
2568 tpacpi_inputdev->close = &hotkey_inputdev_close;
2569
2570 hotkey_poll_setup_safe(1);
2571 tpacpi_send_radiosw_update();
2572 tpacpi_input_send_tabletsw();
2573
2574 return 0;
2575
2576 err_exit:
2577 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
2578 hotkey_dev_attributes = NULL;
2579
2580 return (res < 0)? res : 1;
2581 }
2582
2583 static bool hotkey_notify_hotkey(const u32 hkey,
2584 bool *send_acpi_ev,
2585 bool *ignore_acpi_ev)
2586 {
2587 /* 0x1000-0x1FFF: key presses */
2588 unsigned int scancode = hkey & 0xfff;
2589 *send_acpi_ev = true;
2590 *ignore_acpi_ev = false;
2591
2592 if (scancode > 0 && scancode < 0x21) {
2593 scancode--;
2594 if (!(hotkey_source_mask & (1 << scancode))) {
2595 tpacpi_input_send_key(scancode);
2596 *send_acpi_ev = false;
2597 } else {
2598 *ignore_acpi_ev = true;
2599 }
2600 return true;
2601 }
2602 return false;
2603 }
2604
2605 static bool hotkey_notify_wakeup(const u32 hkey,
2606 bool *send_acpi_ev,
2607 bool *ignore_acpi_ev)
2608 {
2609 /* 0x2000-0x2FFF: Wakeup reason */
2610 *send_acpi_ev = true;
2611 *ignore_acpi_ev = false;
2612
2613 switch (hkey) {
2614 case 0x2304: /* suspend, undock */
2615 case 0x2404: /* hibernation, undock */
2616 hotkey_wakeup_reason = TP_ACPI_WAKEUP_UNDOCK;
2617 *ignore_acpi_ev = true;
2618 break;
2619
2620 case 0x2305: /* suspend, bay eject */
2621 case 0x2405: /* hibernation, bay eject */
2622 hotkey_wakeup_reason = TP_ACPI_WAKEUP_BAYEJ;
2623 *ignore_acpi_ev = true;
2624 break;
2625
2626 case 0x2313: /* Battery on critical low level (S3) */
2627 case 0x2413: /* Battery on critical low level (S4) */
2628 printk(TPACPI_ALERT
2629 "EMERGENCY WAKEUP: battery almost empty\n");
2630 /* how to auto-heal: */
2631 /* 2313: woke up from S3, go to S4/S5 */
2632 /* 2413: woke up from S4, go to S5 */
2633 break;
2634
2635 default:
2636 return false;
2637 }
2638
2639 if (hotkey_wakeup_reason != TP_ACPI_WAKEUP_NONE) {
2640 printk(TPACPI_INFO
2641 "woke up due to a hot-unplug "
2642 "request...\n");
2643 hotkey_wakeup_reason_notify_change();
2644 }
2645 return true;
2646 }
2647
2648 static bool hotkey_notify_usrevent(const u32 hkey,
2649 bool *send_acpi_ev,
2650 bool *ignore_acpi_ev)
2651 {
2652 /* 0x5000-0x5FFF: human interface helpers */
2653 *send_acpi_ev = true;
2654 *ignore_acpi_ev = false;
2655
2656 switch (hkey) {
2657 case 0x5010: /* Lenovo new BIOS: brightness changed */
2658 case 0x500b: /* X61t: tablet pen inserted into bay */
2659 case 0x500c: /* X61t: tablet pen removed from bay */
2660 return true;
2661
2662 case 0x5009: /* X41t-X61t: swivel up (tablet mode) */
2663 case 0x500a: /* X41t-X61t: swivel down (normal mode) */
2664 tpacpi_input_send_tabletsw();
2665 hotkey_tablet_mode_notify_change();
2666 *send_acpi_ev = false;
2667 return true;
2668
2669 case 0x5001:
2670 case 0x5002:
2671 /* LID switch events. Do not propagate */
2672 *ignore_acpi_ev = true;
2673 return true;
2674
2675 default:
2676 return false;
2677 }
2678 }
2679
2680 static bool hotkey_notify_thermal(const u32 hkey,
2681 bool *send_acpi_ev,
2682 bool *ignore_acpi_ev)
2683 {
2684 /* 0x6000-0x6FFF: thermal alarms */
2685 *send_acpi_ev = true;
2686 *ignore_acpi_ev = false;
2687
2688 switch (hkey) {
2689 case 0x6011:
2690 printk(TPACPI_CRIT
2691 "THERMAL ALARM: battery is too hot!\n");
2692 /* recommended action: warn user through gui */
2693 return true;
2694 case 0x6012:
2695 printk(TPACPI_ALERT
2696 "THERMAL EMERGENCY: battery is extremely hot!\n");
2697 /* recommended action: immediate sleep/hibernate */
2698 return true;
2699 case 0x6021:
2700 printk(TPACPI_CRIT
2701 "THERMAL ALARM: "
2702 "a sensor reports something is too hot!\n");
2703 /* recommended action: warn user through gui, that */
2704 /* some internal component is too hot */
2705 return true;
2706 case 0x6022:
2707 printk(TPACPI_ALERT
2708 "THERMAL EMERGENCY: "
2709 "a sensor reports something is extremely hot!\n");
2710 /* recommended action: immediate sleep/hibernate */
2711 return true;
2712 default:
2713 printk(TPACPI_ALERT
2714 "THERMAL ALERT: unknown thermal alarm received\n");
2715 return false;
2716 }
2717 }
2718
2719 static void hotkey_notify(struct ibm_struct *ibm, u32 event)
2720 {
2721 u32 hkey;
2722 bool send_acpi_ev;
2723 bool ignore_acpi_ev;
2724 bool known_ev;
2725
2726 if (event != 0x80) {
2727 printk(TPACPI_ERR
2728 "unknown HKEY notification event %d\n", event);
2729 /* forward it to userspace, maybe it knows how to handle it */
2730 acpi_bus_generate_netlink_event(
2731 ibm->acpi->device->pnp.device_class,
2732 dev_name(&ibm->acpi->device->dev),
2733 event, 0);
2734 return;
2735 }
2736
2737 while (1) {
2738 if (!acpi_evalf(hkey_handle, &hkey, "MHKP", "d")) {
2739 printk(TPACPI_ERR "failed to retrieve HKEY event\n");
2740 return;
2741 }
2742
2743 if (hkey == 0) {
2744 /* queue empty */
2745 return;
2746 }
2747
2748 send_acpi_ev = true;
2749 ignore_acpi_ev = false;
2750
2751 switch (hkey >> 12) {
2752 case 1:
2753 /* 0x1000-0x1FFF: key presses */
2754 known_ev = hotkey_notify_hotkey(hkey, &send_acpi_ev,
2755 &ignore_acpi_ev);
2756 break;
2757 case 2:
2758 /* 0x2000-0x2FFF: Wakeup reason */
2759 known_ev = hotkey_notify_wakeup(hkey, &send_acpi_ev,
2760 &ignore_acpi_ev);
2761 break;
2762 case 3:
2763 /* 0x3000-0x3FFF: bay-related wakeups */
2764 if (hkey == 0x3003) {
2765 hotkey_autosleep_ack = 1;
2766 printk(TPACPI_INFO
2767 "bay ejected\n");
2768 hotkey_wakeup_hotunplug_complete_notify_change();
2769 known_ev = true;
2770 } else {
2771 known_ev = false;
2772 }
2773 break;
2774 case 4:
2775 /* 0x4000-0x4FFF: dock-related wakeups */
2776 if (hkey == 0x4003) {
2777 hotkey_autosleep_ack = 1;
2778 printk(TPACPI_INFO
2779 "undocked\n");
2780 hotkey_wakeup_hotunplug_complete_notify_change();
2781 known_ev = true;
2782 } else {
2783 known_ev = false;
2784 }
2785 break;
2786 case 5:
2787 /* 0x5000-0x5FFF: human interface helpers */
2788 known_ev = hotkey_notify_usrevent(hkey, &send_acpi_ev,
2789 &ignore_acpi_ev);
2790 break;
2791 case 6:
2792 /* 0x6000-0x6FFF: thermal alarms */
2793 known_ev = hotkey_notify_thermal(hkey, &send_acpi_ev,
2794 &ignore_acpi_ev);
2795 break;
2796 case 7:
2797 /* 0x7000-0x7FFF: misc */
2798 if (tp_features.hotkey_wlsw && hkey == 0x7000) {
2799 tpacpi_send_radiosw_update();
2800 send_acpi_ev = 0;
2801 known_ev = true;
2802 break;
2803 }
2804 /* fallthrough to default */
2805 default:
2806 known_ev = false;
2807 }
2808 if (!known_ev) {
2809 printk(TPACPI_NOTICE
2810 "unhandled HKEY event 0x%04x\n", hkey);
2811 printk(TPACPI_NOTICE
2812 "please report the conditions when this "
2813 "event happened to %s\n", TPACPI_MAIL);
2814 }
2815
2816 /* Legacy events */
2817 if (!ignore_acpi_ev &&
2818 (send_acpi_ev || hotkey_report_mode < 2)) {
2819 acpi_bus_generate_proc_event(ibm->acpi->device,
2820 event, hkey);
2821 }
2822
2823 /* netlink events */
2824 if (!ignore_acpi_ev && send_acpi_ev) {
2825 acpi_bus_generate_netlink_event(
2826 ibm->acpi->device->pnp.device_class,
2827 dev_name(&ibm->acpi->device->dev),
2828 event, hkey);
2829 }
2830 }
2831 }
2832
2833 static void hotkey_suspend(pm_message_t state)
2834 {
2835 /* Do these on suspend, we get the events on early resume! */
2836 hotkey_wakeup_reason = TP_ACPI_WAKEUP_NONE;
2837 hotkey_autosleep_ack = 0;
2838 }
2839
2840 static void hotkey_resume(void)
2841 {
2842 tpacpi_disable_brightness_delay();
2843
2844 if (hotkey_mask_get())
2845 printk(TPACPI_ERR
2846 "error while trying to read hot key mask "
2847 "from firmware\n");
2848 tpacpi_send_radiosw_update();
2849 hotkey_tablet_mode_notify_change();
2850 hotkey_wakeup_reason_notify_change();
2851 hotkey_wakeup_hotunplug_complete_notify_change();
2852 hotkey_poll_setup_safe(0);
2853 }
2854
2855 /* procfs -------------------------------------------------------------- */
2856 static int hotkey_read(char *p)
2857 {
2858 int res, status;
2859 int len = 0;
2860
2861 if (!tp_features.hotkey) {
2862 len += sprintf(p + len, "status:\t\tnot supported\n");
2863 return len;
2864 }
2865
2866 if (mutex_lock_killable(&hotkey_mutex))
2867 return -ERESTARTSYS;
2868 res = hotkey_status_get(&status);
2869 if (!res)
2870 res = hotkey_mask_get();
2871 mutex_unlock(&hotkey_mutex);
2872 if (res)
2873 return res;
2874
2875 len += sprintf(p + len, "status:\t\t%s\n", enabled(status, 0));
2876 if (tp_features.hotkey_mask) {
2877 len += sprintf(p + len, "mask:\t\t0x%08x\n", hotkey_mask);
2878 len += sprintf(p + len,
2879 "commands:\tenable, disable, reset, <mask>\n");
2880 } else {
2881 len += sprintf(p + len, "mask:\t\tnot supported\n");
2882 len += sprintf(p + len, "commands:\tenable, disable, reset\n");
2883 }
2884
2885 return len;
2886 }
2887
2888 static int hotkey_write(char *buf)
2889 {
2890 int res, status;
2891 u32 mask;
2892 char *cmd;
2893
2894 if (!tp_features.hotkey)
2895 return -ENODEV;
2896
2897 if (mutex_lock_killable(&hotkey_mutex))
2898 return -ERESTARTSYS;
2899
2900 status = -1;
2901 mask = hotkey_mask;
2902
2903 res = 0;
2904 while ((cmd = next_cmd(&buf))) {
2905 if (strlencmp(cmd, "enable") == 0) {
2906 status = 1;
2907 } else if (strlencmp(cmd, "disable") == 0) {
2908 status = 0;
2909 } else if (strlencmp(cmd, "reset") == 0) {
2910 status = hotkey_orig_status;
2911 mask = hotkey_orig_mask;
2912 } else if (sscanf(cmd, "0x%x", &mask) == 1) {
2913 /* mask set */
2914 } else if (sscanf(cmd, "%x", &mask) == 1) {
2915 /* mask set */
2916 } else {
2917 res = -EINVAL;
2918 goto errexit;
2919 }
2920 }
2921 if (status != -1)
2922 res = hotkey_status_set(status);
2923
2924 if (!res && mask != hotkey_mask)
2925 res = hotkey_mask_set(mask);
2926
2927 errexit:
2928 mutex_unlock(&hotkey_mutex);
2929 return res;
2930 }
2931
2932 static const struct acpi_device_id ibm_htk_device_ids[] = {
2933 {TPACPI_ACPI_HKEY_HID, 0},
2934 {"", 0},
2935 };
2936
2937 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver = {
2938 .hid = ibm_htk_device_ids,
2939 .notify = hotkey_notify,
2940 .handle = &hkey_handle,
2941 .type = ACPI_DEVICE_NOTIFY,
2942 };
2943
2944 static struct ibm_struct hotkey_driver_data = {
2945 .name = "hotkey",
2946 .read = hotkey_read,
2947 .write = hotkey_write,
2948 .exit = hotkey_exit,
2949 .resume = hotkey_resume,
2950 .suspend = hotkey_suspend,
2951 .acpi = &ibm_hotkey_acpidriver,
2952 };
2953
2954 /*************************************************************************
2955 * Bluetooth subdriver
2956 */
2957
2958 enum {
2959 /* ACPI GBDC/SBDC bits */
2960 TP_ACPI_BLUETOOTH_HWPRESENT = 0x01, /* Bluetooth hw available */
2961 TP_ACPI_BLUETOOTH_RADIOSSW = 0x02, /* Bluetooth radio enabled */
2962 TP_ACPI_BLUETOOTH_RESUMECTRL = 0x04, /* Bluetooth state at resume:
2963 off / last state */
2964 };
2965
2966 enum {
2967 /* ACPI \BLTH commands */
2968 TP_ACPI_BLTH_GET_ULTRAPORT_ID = 0x00, /* Get Ultraport BT ID */
2969 TP_ACPI_BLTH_GET_PWR_ON_RESUME = 0x01, /* Get power-on-resume state */
2970 TP_ACPI_BLTH_PWR_ON_ON_RESUME = 0x02, /* Resume powered on */
2971 TP_ACPI_BLTH_PWR_OFF_ON_RESUME = 0x03, /* Resume powered off */
2972 TP_ACPI_BLTH_SAVE_STATE = 0x05, /* Save state for S4/S5 */
2973 };
2974
2975 static struct rfkill *tpacpi_bluetooth_rfkill;
2976
2977 static void bluetooth_suspend(pm_message_t state)
2978 {
2979 /* Try to make sure radio will resume powered off */
2980 acpi_evalf(NULL, NULL, "\\BLTH", "vd",
2981 TP_ACPI_BLTH_PWR_OFF_ON_RESUME);
2982 }
2983
2984 static int bluetooth_get_radiosw(void)
2985 {
2986 int status;
2987
2988 if (!tp_features.bluetooth)
2989 return -ENODEV;
2990
2991 /* WLSW overrides bluetooth in firmware/hardware, reflect that */
2992 if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&status) && !status)
2993 return RFKILL_STATE_HARD_BLOCKED;
2994
2995 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
2996 if (dbg_bluetoothemul)
2997 return (tpacpi_bluetooth_emulstate) ?
2998 RFKILL_STATE_UNBLOCKED : RFKILL_STATE_SOFT_BLOCKED;
2999 #endif
3000
3001 if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
3002 return -EIO;
3003
3004 return ((status & TP_ACPI_BLUETOOTH_RADIOSSW) != 0) ?
3005 RFKILL_STATE_UNBLOCKED : RFKILL_STATE_SOFT_BLOCKED;
3006 }
3007
3008 static void bluetooth_update_rfk(void)
3009 {
3010 int status;
3011
3012 if (!tpacpi_bluetooth_rfkill)
3013 return;
3014
3015 status = bluetooth_get_radiosw();
3016 if (status < 0)
3017 return;
3018 rfkill_force_state(tpacpi_bluetooth_rfkill, status);
3019 }
3020
3021 static int bluetooth_set_radiosw(int radio_on, int update_rfk)
3022 {
3023 int status;
3024
3025 if (!tp_features.bluetooth)
3026 return -ENODEV;
3027
3028 /* WLSW overrides bluetooth in firmware/hardware, but there is no
3029 * reason to risk weird behaviour. */
3030 if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&status) && !status
3031 && radio_on)
3032 return -EPERM;
3033
3034 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3035 if (dbg_bluetoothemul) {
3036 tpacpi_bluetooth_emulstate = !!radio_on;
3037 if (update_rfk)
3038 bluetooth_update_rfk();
3039 return 0;
3040 }
3041 #endif
3042
3043 /* We make sure to keep TP_ACPI_BLUETOOTH_RESUMECTRL off */
3044 if (radio_on)
3045 status = TP_ACPI_BLUETOOTH_RADIOSSW;
3046 else
3047 status = 0;
3048 if (!acpi_evalf(hkey_handle, NULL, "SBDC", "vd", status))
3049 return -EIO;
3050
3051 if (update_rfk)
3052 bluetooth_update_rfk();
3053
3054 return 0;
3055 }
3056
3057 /* sysfs bluetooth enable ---------------------------------------------- */
3058 static ssize_t bluetooth_enable_show(struct device *dev,
3059 struct device_attribute *attr,
3060 char *buf)
3061 {
3062 int status;
3063
3064 status = bluetooth_get_radiosw();
3065 if (status < 0)
3066 return status;
3067
3068 return snprintf(buf, PAGE_SIZE, "%d\n",
3069 (status == RFKILL_STATE_UNBLOCKED) ? 1 : 0);
3070 }
3071
3072 static ssize_t bluetooth_enable_store(struct device *dev,
3073 struct device_attribute *attr,
3074 const char *buf, size_t count)
3075 {
3076 unsigned long t;
3077 int res;
3078
3079 if (parse_strtoul(buf, 1, &t))
3080 return -EINVAL;
3081
3082 res = bluetooth_set_radiosw(t, 1);
3083
3084 return (res) ? res : count;
3085 }
3086
3087 static struct device_attribute dev_attr_bluetooth_enable =
3088 __ATTR(bluetooth_enable, S_IWUSR | S_IRUGO,
3089 bluetooth_enable_show, bluetooth_enable_store);
3090
3091 /* --------------------------------------------------------------------- */
3092
3093 static struct attribute *bluetooth_attributes[] = {
3094 &dev_attr_bluetooth_enable.attr,
3095 NULL
3096 };
3097
3098 static const struct attribute_group bluetooth_attr_group = {
3099 .attrs = bluetooth_attributes,
3100 };
3101
3102 static int tpacpi_bluetooth_rfk_get(void *data, enum rfkill_state *state)
3103 {
3104 int bts = bluetooth_get_radiosw();
3105
3106 if (bts < 0)
3107 return bts;
3108
3109 *state = bts;
3110 return 0;
3111 }
3112
3113 static int tpacpi_bluetooth_rfk_set(void *data, enum rfkill_state state)
3114 {
3115 return bluetooth_set_radiosw((state == RFKILL_STATE_UNBLOCKED), 0);
3116 }
3117
3118 static void bluetooth_shutdown(void)
3119 {
3120 /* Order firmware to save current state to NVRAM */
3121 if (!acpi_evalf(NULL, NULL, "\\BLTH", "vd",
3122 TP_ACPI_BLTH_SAVE_STATE))
3123 printk(TPACPI_NOTICE
3124 "failed to save bluetooth state to NVRAM\n");
3125 }
3126
3127 static void bluetooth_exit(void)
3128 {
3129 bluetooth_shutdown();
3130
3131 if (tpacpi_bluetooth_rfkill)
3132 rfkill_unregister(tpacpi_bluetooth_rfkill);
3133
3134 sysfs_remove_group(&tpacpi_pdev->dev.kobj,
3135 &bluetooth_attr_group);
3136 }
3137
3138 static int __init bluetooth_init(struct ibm_init_struct *iibm)
3139 {
3140 int res;
3141 int status = 0;
3142
3143 vdbg_printk(TPACPI_DBG_INIT, "initializing bluetooth subdriver\n");
3144
3145 TPACPI_ACPIHANDLE_INIT(hkey);
3146
3147 /* bluetooth not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
3148 G4x, R30, R31, R40e, R50e, T20-22, X20-21 */
3149 tp_features.bluetooth = hkey_handle &&
3150 acpi_evalf(hkey_handle, &status, "GBDC", "qd");
3151
3152 vdbg_printk(TPACPI_DBG_INIT, "bluetooth is %s, status 0x%02x\n",
3153 str_supported(tp_features.bluetooth),
3154 status);
3155
3156 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3157 if (dbg_bluetoothemul) {
3158 tp_features.bluetooth = 1;
3159 printk(TPACPI_INFO
3160 "bluetooth switch emulation enabled\n");
3161 } else
3162 #endif
3163 if (tp_features.bluetooth &&
3164 !(status & TP_ACPI_BLUETOOTH_HWPRESENT)) {
3165 /* no bluetooth hardware present in system */
3166 tp_features.bluetooth = 0;
3167 dbg_printk(TPACPI_DBG_INIT,
3168 "bluetooth hardware not installed\n");
3169 }
3170
3171 if (!tp_features.bluetooth)
3172 return 1;
3173
3174 res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
3175 &bluetooth_attr_group);
3176 if (res)
3177 return res;
3178
3179 res = tpacpi_new_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID,
3180 &tpacpi_bluetooth_rfkill,
3181 RFKILL_TYPE_BLUETOOTH,
3182 "tpacpi_bluetooth_sw",
3183 true,
3184 tpacpi_bluetooth_rfk_set,
3185 tpacpi_bluetooth_rfk_get);
3186 if (res) {
3187 bluetooth_exit();
3188 return res;
3189 }
3190
3191 return 0;
3192 }
3193
3194 /* procfs -------------------------------------------------------------- */
3195 static int bluetooth_read(char *p)
3196 {
3197 int len = 0;
3198 int status = bluetooth_get_radiosw();
3199
3200 if (!tp_features.bluetooth)
3201 len += sprintf(p + len, "status:\t\tnot supported\n");
3202 else {
3203 len += sprintf(p + len, "status:\t\t%s\n",
3204 (status == RFKILL_STATE_UNBLOCKED) ?
3205 "enabled" : "disabled");
3206 len += sprintf(p + len, "commands:\tenable, disable\n");
3207 }
3208
3209 return len;
3210 }
3211
3212 static int bluetooth_write(char *buf)
3213 {
3214 char *cmd;
3215
3216 if (!tp_features.bluetooth)
3217 return -ENODEV;
3218
3219 while ((cmd = next_cmd(&buf))) {
3220 if (strlencmp(cmd, "enable") == 0) {
3221 bluetooth_set_radiosw(1, 1);
3222 } else if (strlencmp(cmd, "disable") == 0) {
3223 bluetooth_set_radiosw(0, 1);
3224 } else
3225 return -EINVAL;
3226 }
3227
3228 return 0;
3229 }
3230
3231 static struct ibm_struct bluetooth_driver_data = {
3232 .name = "bluetooth",
3233 .read = bluetooth_read,
3234 .write = bluetooth_write,
3235 .exit = bluetooth_exit,
3236 .suspend = bluetooth_suspend,
3237 .shutdown = bluetooth_shutdown,
3238 };
3239
3240 /*************************************************************************
3241 * Wan subdriver
3242 */
3243
3244 enum {
3245 /* ACPI GWAN/SWAN bits */
3246 TP_ACPI_WANCARD_HWPRESENT = 0x01, /* Wan hw available */
3247 TP_ACPI_WANCARD_RADIOSSW = 0x02, /* Wan radio enabled */
3248 TP_ACPI_WANCARD_RESUMECTRL = 0x04, /* Wan state at resume:
3249 off / last state */
3250 };
3251
3252 static struct rfkill *tpacpi_wan_rfkill;
3253
3254 static void wan_suspend(pm_message_t state)
3255 {
3256 /* Try to make sure radio will resume powered off */
3257 acpi_evalf(NULL, NULL, "\\WGSV", "qvd",
3258 TP_ACPI_WGSV_PWR_OFF_ON_RESUME);
3259 }
3260
3261 static int wan_get_radiosw(void)
3262 {
3263 int status;
3264
3265 if (!tp_features.wan)
3266 return -ENODEV;
3267
3268 /* WLSW overrides WWAN in firmware/hardware, reflect that */
3269 if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&status) && !status)
3270 return RFKILL_STATE_HARD_BLOCKED;
3271
3272 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3273 if (dbg_wwanemul)
3274 return (tpacpi_wwan_emulstate) ?
3275 RFKILL_STATE_UNBLOCKED : RFKILL_STATE_SOFT_BLOCKED;
3276 #endif
3277
3278 if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
3279 return -EIO;
3280
3281 return ((status & TP_ACPI_WANCARD_RADIOSSW) != 0) ?
3282 RFKILL_STATE_UNBLOCKED : RFKILL_STATE_SOFT_BLOCKED;
3283 }
3284
3285 static void wan_update_rfk(void)
3286 {
3287 int status;
3288
3289 if (!tpacpi_wan_rfkill)
3290 return;
3291
3292 status = wan_get_radiosw();
3293 if (status < 0)
3294 return;
3295 rfkill_force_state(tpacpi_wan_rfkill, status);
3296 }
3297
3298 static int wan_set_radiosw(int radio_on, int update_rfk)
3299 {
3300 int status;
3301
3302 if (!tp_features.wan)
3303 return -ENODEV;
3304
3305 /* WLSW overrides bluetooth in firmware/hardware, but there is no
3306 * reason to risk weird behaviour. */
3307 if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&status) && !status
3308 && radio_on)
3309 return -EPERM;
3310
3311 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3312 if (dbg_wwanemul) {
3313 tpacpi_wwan_emulstate = !!radio_on;
3314 if (update_rfk)
3315 wan_update_rfk();
3316 return 0;
3317 }
3318 #endif
3319
3320 /* We make sure to keep TP_ACPI_WANCARD_RESUMECTRL off */
3321 if (radio_on)
3322 status = TP_ACPI_WANCARD_RADIOSSW;
3323 else
3324 status = 0;
3325 if (!acpi_evalf(hkey_handle, NULL, "SWAN", "vd", status))
3326 return -EIO;
3327
3328 if (update_rfk)
3329 wan_update_rfk();
3330
3331 return 0;
3332 }
3333
3334 /* sysfs wan enable ---------------------------------------------------- */
3335 static ssize_t wan_enable_show(struct device *dev,
3336 struct device_attribute *attr,
3337 char *buf)
3338 {
3339 int status;
3340
3341 status = wan_get_radiosw();
3342 if (status < 0)
3343 return status;
3344
3345 return snprintf(buf, PAGE_SIZE, "%d\n",
3346 (status == RFKILL_STATE_UNBLOCKED) ? 1 : 0);
3347 }
3348
3349 static ssize_t wan_enable_store(struct device *dev,
3350 struct device_attribute *attr,
3351 const char *buf, size_t count)
3352 {
3353 unsigned long t;
3354 int res;
3355
3356 if (parse_strtoul(buf, 1, &t))
3357 return -EINVAL;
3358
3359 res = wan_set_radiosw(t, 1);
3360
3361 return (res) ? res : count;
3362 }
3363
3364 static struct device_attribute dev_attr_wan_enable =
3365 __ATTR(wwan_enable, S_IWUSR | S_IRUGO,
3366 wan_enable_show, wan_enable_store);
3367
3368 /* --------------------------------------------------------------------- */
3369
3370 static struct attribute *wan_attributes[] = {
3371 &dev_attr_wan_enable.attr,
3372 NULL
3373 };
3374
3375 static const struct attribute_group wan_attr_group = {
3376 .attrs = wan_attributes,
3377 };
3378
3379 static int tpacpi_wan_rfk_get(void *data, enum rfkill_state *state)
3380 {
3381 int wans = wan_get_radiosw();
3382
3383 if (wans < 0)
3384 return wans;
3385
3386 *state = wans;
3387 return 0;
3388 }
3389
3390 static int tpacpi_wan_rfk_set(void *data, enum rfkill_state state)
3391 {
3392 return wan_set_radiosw((state == RFKILL_STATE_UNBLOCKED), 0);
3393 }
3394
3395 static void wan_shutdown(void)
3396 {
3397 /* Order firmware to save current state to NVRAM */
3398 if (!acpi_evalf(NULL, NULL, "\\WGSV", "vd",
3399 TP_ACPI_WGSV_SAVE_STATE))
3400 printk(TPACPI_NOTICE
3401 "failed to save WWAN state to NVRAM\n");
3402 }
3403
3404 static void wan_exit(void)
3405 {
3406 wan_shutdown();
3407
3408 if (tpacpi_wan_rfkill)
3409 rfkill_unregister(tpacpi_wan_rfkill);
3410
3411 sysfs_remove_group(&tpacpi_pdev->dev.kobj,
3412 &wan_attr_group);
3413 }
3414
3415 static int __init wan_init(struct ibm_init_struct *iibm)
3416 {
3417 int res;
3418 int status = 0;
3419
3420 vdbg_printk(TPACPI_DBG_INIT, "initializing wan subdriver\n");
3421
3422 TPACPI_ACPIHANDLE_INIT(hkey);
3423
3424 tp_features.wan = hkey_handle &&
3425 acpi_evalf(hkey_handle, &status, "GWAN", "qd");
3426
3427 vdbg_printk(TPACPI_DBG_INIT, "wan is %s, status 0x%02x\n",
3428 str_supported(tp_features.wan),
3429 status);
3430
3431 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3432 if (dbg_wwanemul) {
3433 tp_features.wan = 1;
3434 printk(TPACPI_INFO
3435 "wwan switch emulation enabled\n");
3436 } else
3437 #endif
3438 if (tp_features.wan &&
3439 !(status & TP_ACPI_WANCARD_HWPRESENT)) {
3440 /* no wan hardware present in system */
3441 tp_features.wan = 0;
3442 dbg_printk(TPACPI_DBG_INIT,
3443 "wan hardware not installed\n");
3444 }
3445
3446 if (!tp_features.wan)
3447 return 1;
3448
3449 res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
3450 &wan_attr_group);
3451 if (res)
3452 return res;
3453
3454 res = tpacpi_new_rfkill(TPACPI_RFK_WWAN_SW_ID,
3455 &tpacpi_wan_rfkill,
3456 RFKILL_TYPE_WWAN,
3457 "tpacpi_wwan_sw",
3458 true,
3459 tpacpi_wan_rfk_set,
3460 tpacpi_wan_rfk_get);
3461 if (res) {
3462 wan_exit();
3463 return res;
3464 }
3465
3466 return 0;
3467 }
3468
3469 /* procfs -------------------------------------------------------------- */
3470 static int wan_read(char *p)
3471 {
3472 int len = 0;
3473 int status = wan_get_radiosw();
3474
3475 if (!tp_features.wan)
3476 len += sprintf(p + len, "status:\t\tnot supported\n");
3477 else {
3478 len += sprintf(p + len, "status:\t\t%s\n",
3479 (status == RFKILL_STATE_UNBLOCKED) ?
3480 "enabled" : "disabled");
3481 len += sprintf(p + len, "commands:\tenable, disable\n");
3482 }
3483
3484 return len;
3485 }
3486
3487 static int wan_write(char *buf)
3488 {
3489 char *cmd;
3490
3491 if (!tp_features.wan)
3492 return -ENODEV;
3493
3494 while ((cmd = next_cmd(&buf))) {
3495 if (strlencmp(cmd, "enable") == 0) {
3496 wan_set_radiosw(1, 1);
3497 } else if (strlencmp(cmd, "disable") == 0) {
3498 wan_set_radiosw(0, 1);
3499 } else
3500 return -EINVAL;
3501 }
3502
3503 return 0;
3504 }
3505
3506 static struct ibm_struct wan_driver_data = {
3507 .name = "wan",
3508 .read = wan_read,
3509 .write = wan_write,
3510 .exit = wan_exit,
3511 .suspend = wan_suspend,
3512 .shutdown = wan_shutdown,
3513 };
3514
3515 /*************************************************************************
3516 * UWB subdriver
3517 */
3518
3519 enum {
3520 /* ACPI GUWB/SUWB bits */
3521 TP_ACPI_UWB_HWPRESENT = 0x01, /* UWB hw available */
3522 TP_ACPI_UWB_RADIOSSW = 0x02, /* UWB radio enabled */
3523 };
3524
3525 static struct rfkill *tpacpi_uwb_rfkill;
3526
3527 static int uwb_get_radiosw(void)
3528 {
3529 int status;
3530
3531 if (!tp_features.uwb)
3532 return -ENODEV;
3533
3534 /* WLSW overrides UWB in firmware/hardware, reflect that */
3535 if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&status) && !status)
3536 return RFKILL_STATE_HARD_BLOCKED;
3537
3538 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3539 if (dbg_uwbemul)
3540 return (tpacpi_uwb_emulstate) ?
3541 RFKILL_STATE_UNBLOCKED : RFKILL_STATE_SOFT_BLOCKED;
3542 #endif
3543
3544 if (!acpi_evalf(hkey_handle, &status, "GUWB", "d"))
3545 return -EIO;
3546
3547 return ((status & TP_ACPI_UWB_RADIOSSW) != 0) ?
3548 RFKILL_STATE_UNBLOCKED : RFKILL_STATE_SOFT_BLOCKED;
3549 }
3550
3551 static void uwb_update_rfk(void)
3552 {
3553 int status;
3554
3555 if (!tpacpi_uwb_rfkill)
3556 return;
3557
3558 status = uwb_get_radiosw();
3559 if (status < 0)
3560 return;
3561 rfkill_force_state(tpacpi_uwb_rfkill, status);
3562 }
3563
3564 static int uwb_set_radiosw(int radio_on, int update_rfk)
3565 {
3566 int status;
3567
3568 if (!tp_features.uwb)
3569 return -ENODEV;
3570
3571 /* WLSW overrides UWB in firmware/hardware, but there is no
3572 * reason to risk weird behaviour. */
3573 if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&status) && !status
3574 && radio_on)
3575 return -EPERM;
3576
3577 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3578 if (dbg_uwbemul) {
3579 tpacpi_uwb_emulstate = !!radio_on;
3580 if (update_rfk)
3581 uwb_update_rfk();
3582 return 0;
3583 }
3584 #endif
3585
3586 status = (radio_on) ? TP_ACPI_UWB_RADIOSSW : 0;
3587 if (!acpi_evalf(hkey_handle, NULL, "SUWB", "vd", status))
3588 return -EIO;
3589
3590 if (update_rfk)
3591 uwb_update_rfk();
3592
3593 return 0;
3594 }
3595
3596 /* --------------------------------------------------------------------- */
3597
3598 static int tpacpi_uwb_rfk_get(void *data, enum rfkill_state *state)
3599 {
3600 int uwbs = uwb_get_radiosw();
3601
3602 if (uwbs < 0)
3603 return uwbs;
3604
3605 *state = uwbs;
3606 return 0;
3607 }
3608
3609 static int tpacpi_uwb_rfk_set(void *data, enum rfkill_state state)
3610 {
3611 return uwb_set_radiosw((state == RFKILL_STATE_UNBLOCKED), 0);
3612 }
3613
3614 static void uwb_exit(void)
3615 {
3616 if (tpacpi_uwb_rfkill)
3617 rfkill_unregister(tpacpi_uwb_rfkill);
3618 }
3619
3620 static int __init uwb_init(struct ibm_init_struct *iibm)
3621 {
3622 int res;
3623 int status = 0;
3624
3625 vdbg_printk(TPACPI_DBG_INIT, "initializing uwb subdriver\n");
3626
3627 TPACPI_ACPIHANDLE_INIT(hkey);
3628
3629 tp_features.uwb = hkey_handle &&
3630 acpi_evalf(hkey_handle, &status, "GUWB", "qd");
3631
3632 vdbg_printk(TPACPI_DBG_INIT, "uwb is %s, status 0x%02x\n",
3633 str_supported(tp_features.uwb),
3634 status);
3635
3636 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3637 if (dbg_uwbemul) {
3638 tp_features.uwb = 1;
3639 printk(TPACPI_INFO
3640 "uwb switch emulation enabled\n");
3641 } else
3642 #endif
3643 if (tp_features.uwb &&
3644 !(status & TP_ACPI_UWB_HWPRESENT)) {
3645 /* no uwb hardware present in system */
3646 tp_features.uwb = 0;
3647 dbg_printk(TPACPI_DBG_INIT,
3648 "uwb hardware not installed\n");
3649 }
3650
3651 if (!tp_features.uwb)
3652 return 1;
3653
3654 res = tpacpi_new_rfkill(TPACPI_RFK_UWB_SW_ID,
3655 &tpacpi_uwb_rfkill,
3656 RFKILL_TYPE_UWB,
3657 "tpacpi_uwb_sw",
3658 false,
3659 tpacpi_uwb_rfk_set,
3660 tpacpi_uwb_rfk_get);
3661
3662 return res;
3663 }
3664
3665 static struct ibm_struct uwb_driver_data = {
3666 .name = "uwb",
3667 .exit = uwb_exit,
3668 .flags.experimental = 1,
3669 };
3670
3671 /*************************************************************************
3672 * Video subdriver
3673 */
3674
3675 #ifdef CONFIG_THINKPAD_ACPI_VIDEO
3676
3677 enum video_access_mode {
3678 TPACPI_VIDEO_NONE = 0,
3679 TPACPI_VIDEO_570, /* 570 */
3680 TPACPI_VIDEO_770, /* 600e/x, 770e, 770x */
3681 TPACPI_VIDEO_NEW, /* all others */
3682 };
3683
3684 enum { /* video status flags, based on VIDEO_570 */
3685 TP_ACPI_VIDEO_S_LCD = 0x01, /* LCD output enabled */
3686 TP_ACPI_VIDEO_S_CRT = 0x02, /* CRT output enabled */
3687 TP_ACPI_VIDEO_S_DVI = 0x08, /* DVI output enabled */
3688 };
3689
3690 enum { /* TPACPI_VIDEO_570 constants */
3691 TP_ACPI_VIDEO_570_PHSCMD = 0x87, /* unknown magic constant :( */
3692 TP_ACPI_VIDEO_570_PHSMASK = 0x03, /* PHS bits that map to
3693 * video_status_flags */
3694 TP_ACPI_VIDEO_570_PHS2CMD = 0x8b, /* unknown magic constant :( */
3695 TP_ACPI_VIDEO_570_PHS2SET = 0x80, /* unknown magic constant :( */
3696 };
3697
3698 static enum video_access_mode video_supported;
3699 static int video_orig_autosw;
3700
3701 static int video_autosw_get(void);
3702 static int video_autosw_set(int enable);
3703
3704 TPACPI_HANDLE(vid2, root, "\\_SB.PCI0.AGPB.VID"); /* G41 */
3705
3706 static int __init video_init(struct ibm_init_struct *iibm)
3707 {
3708 int ivga;
3709
3710 vdbg_printk(TPACPI_DBG_INIT, "initializing video subdriver\n");
3711
3712 TPACPI_ACPIHANDLE_INIT(vid);
3713 TPACPI_ACPIHANDLE_INIT(vid2);
3714
3715 if (vid2_handle && acpi_evalf(NULL, &ivga, "\\IVGA", "d") && ivga)
3716 /* G41, assume IVGA doesn't change */
3717 vid_handle = vid2_handle;
3718
3719 if (!vid_handle)
3720 /* video switching not supported on R30, R31 */
3721 video_supported = TPACPI_VIDEO_NONE;
3722 else if (acpi_evalf(vid_handle, &video_orig_autosw, "SWIT", "qd"))
3723 /* 570 */
3724 video_supported = TPACPI_VIDEO_570;
3725 else if (acpi_evalf(vid_handle, &video_orig_autosw, "^VADL", "qd"))
3726 /* 600e/x, 770e, 770x */
3727 video_supported = TPACPI_VIDEO_770;
3728 else
3729 /* all others */
3730 video_supported = TPACPI_VIDEO_NEW;
3731
3732 vdbg_printk(TPACPI_DBG_INIT, "video is %s, mode %d\n",
3733 str_supported(video_supported != TPACPI_VIDEO_NONE),
3734 video_supported);
3735
3736 return (video_supported != TPACPI_VIDEO_NONE)? 0 : 1;
3737 }
3738
3739 static void video_exit(void)
3740 {
3741 dbg_printk(TPACPI_DBG_EXIT,
3742 "restoring original video autoswitch mode\n");
3743 if (video_autosw_set(video_orig_autosw))
3744 printk(TPACPI_ERR "error while trying to restore original "
3745 "video autoswitch mode\n");
3746 }
3747
3748 static int video_outputsw_get(void)
3749 {
3750 int status = 0;
3751 int i;
3752
3753 switch (video_supported) {
3754 case TPACPI_VIDEO_570:
3755 if (!acpi_evalf(NULL, &i, "\\_SB.PHS", "dd",
3756 TP_ACPI_VIDEO_570_PHSCMD))
3757 return -EIO;
3758 status = i & TP_ACPI_VIDEO_570_PHSMASK;
3759 break;
3760 case TPACPI_VIDEO_770:
3761 if (!acpi_evalf(NULL, &i, "\\VCDL", "d"))
3762 return -EIO;
3763 if (i)
3764 status |= TP_ACPI_VIDEO_S_LCD;
3765 if (!acpi_evalf(NULL, &i, "\\VCDC", "d"))
3766 return -EIO;
3767 if (i)
3768 status |= TP_ACPI_VIDEO_S_CRT;
3769 break;
3770 case TPACPI_VIDEO_NEW:
3771 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 1) ||
3772 !acpi_evalf(NULL, &i, "\\VCDC", "d"))
3773 return -EIO;
3774 if (i)
3775 status |= TP_ACPI_VIDEO_S_CRT;
3776
3777 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0) ||
3778 !acpi_evalf(NULL, &i, "\\VCDL", "d"))
3779 return -EIO;
3780 if (i)
3781 status |= TP_ACPI_VIDEO_S_LCD;
3782 if (!acpi_evalf(NULL, &i, "\\VCDD", "d"))
3783 return -EIO;
3784 if (i)
3785 status |= TP_ACPI_VIDEO_S_DVI;
3786 break;
3787 default:
3788 return -ENOSYS;
3789 }
3790
3791 return status;
3792 }
3793
3794 static int video_outputsw_set(int status)
3795 {
3796 int autosw;
3797 int res = 0;
3798
3799 switch (video_supported) {
3800 case TPACPI_VIDEO_570:
3801 res = acpi_evalf(NULL, NULL,
3802 "\\_SB.PHS2", "vdd",
3803 TP_ACPI_VIDEO_570_PHS2CMD,
3804 status | TP_ACPI_VIDEO_570_PHS2SET);
3805 break;
3806 case TPACPI_VIDEO_770:
3807 autosw = video_autosw_get();
3808 if (autosw < 0)
3809 return autosw;
3810
3811 res = video_autosw_set(1);
3812 if (res)
3813 return res;
3814 res = acpi_evalf(vid_handle, NULL,
3815 "ASWT", "vdd", status * 0x100, 0);
3816 if (!autosw && video_autosw_set(autosw)) {
3817 printk(TPACPI_ERR
3818 "video auto-switch left enabled due to error\n");
3819 return -EIO;
3820 }
3821 break;
3822 case TPACPI_VIDEO_NEW:
3823 res = acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0x80) &&
3824 acpi_evalf(NULL, NULL, "\\VSDS", "vdd", status, 1);
3825 break;
3826 default:
3827 return -ENOSYS;
3828 }
3829
3830 return (res)? 0 : -EIO;
3831 }
3832
3833 static int video_autosw_get(void)
3834 {
3835 int autosw = 0;
3836
3837 switch (video_supported) {
3838 case TPACPI_VIDEO_570:
3839 if (!acpi_evalf(vid_handle, &autosw, "SWIT", "d"))
3840 return -EIO;
3841 break;
3842 case TPACPI_VIDEO_770:
3843 case TPACPI_VIDEO_NEW:
3844 if (!acpi_evalf(vid_handle, &autosw, "^VDEE", "d"))
3845 return -EIO;
3846 break;
3847 default:
3848 return -ENOSYS;
3849 }
3850
3851 return autosw & 1;
3852 }
3853
3854 static int video_autosw_set(int enable)
3855 {
3856 if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", (enable)? 1 : 0))
3857 return -EIO;
3858 return 0;
3859 }
3860
3861 static int video_outputsw_cycle(void)
3862 {
3863 int autosw = video_autosw_get();
3864 int res;
3865
3866 if (autosw < 0)
3867 return autosw;
3868
3869 switch (video_supported) {
3870 case TPACPI_VIDEO_570:
3871 res = video_autosw_set(1);
3872 if (res)
3873 return res;
3874 res = acpi_evalf(ec_handle, NULL, "_Q16", "v");
3875 break;
3876 case TPACPI_VIDEO_770:
3877 case TPACPI_VIDEO_NEW:
3878 res = video_autosw_set(1);
3879 if (res)
3880 return res;
3881 res = acpi_evalf(vid_handle, NULL, "VSWT", "v");
3882 break;
3883 default:
3884 return -ENOSYS;
3885 }
3886 if (!autosw && video_autosw_set(autosw)) {
3887 printk(TPACPI_ERR
3888 "video auto-switch left enabled due to error\n");
3889 return -EIO;
3890 }
3891
3892 return (res)? 0 : -EIO;
3893 }
3894
3895 static int video_expand_toggle(void)
3896 {
3897 switch (video_supported) {
3898 case TPACPI_VIDEO_570:
3899 return acpi_evalf(ec_handle, NULL, "_Q17", "v")?
3900 0 : -EIO;
3901 case TPACPI_VIDEO_770:
3902 return acpi_evalf(vid_handle, NULL, "VEXP", "v")?
3903 0 : -EIO;
3904 case TPACPI_VIDEO_NEW:
3905 return acpi_evalf(NULL, NULL, "\\VEXP", "v")?
3906 0 : -EIO;
3907 default:
3908 return -ENOSYS;
3909 }
3910 /* not reached */
3911 }
3912
3913 static int video_read(char *p)
3914 {
3915 int status, autosw;
3916 int len = 0;
3917
3918 if (video_supported == TPACPI_VIDEO_NONE) {
3919 len += sprintf(p + len, "status:\t\tnot supported\n");
3920 return len;
3921 }
3922
3923 status = video_outputsw_get();
3924 if (status < 0)
3925 return status;
3926
3927 autosw = video_autosw_get();
3928 if (autosw < 0)
3929 return autosw;
3930
3931 len += sprintf(p + len, "status:\t\tsupported\n");
3932 len += sprintf(p + len, "lcd:\t\t%s\n", enabled(status, 0));
3933 len += sprintf(p + len, "crt:\t\t%s\n", enabled(status, 1));
3934 if (video_supported == TPACPI_VIDEO_NEW)
3935 len += sprintf(p + len, "dvi:\t\t%s\n", enabled(status, 3));
3936 len += sprintf(p + len, "auto:\t\t%s\n", enabled(autosw, 0));
3937 len += sprintf(p + len, "commands:\tlcd_enable, lcd_disable\n");
3938 len += sprintf(p + len, "commands:\tcrt_enable, crt_disable\n");
3939 if (video_supported == TPACPI_VIDEO_NEW)
3940 len += sprintf(p + len, "commands:\tdvi_enable, dvi_disable\n");
3941 len += sprintf(p + len, "commands:\tauto_enable, auto_disable\n");
3942 len += sprintf(p + len, "commands:\tvideo_switch, expand_toggle\n");
3943
3944 return len;
3945 }
3946
3947 static int video_write(char *buf)
3948 {
3949 char *cmd;
3950 int enable, disable, status;
3951 int res;
3952
3953 if (video_supported == TPACPI_VIDEO_NONE)
3954 return -ENODEV;
3955
3956 enable = 0;
3957 disable = 0;
3958
3959 while ((cmd = next_cmd(&buf))) {
3960 if (strlencmp(cmd, "lcd_enable") == 0) {
3961 enable |= TP_ACPI_VIDEO_S_LCD;
3962 } else if (strlencmp(cmd, "lcd_disable") == 0) {
3963 disable |= TP_ACPI_VIDEO_S_LCD;
3964 } else if (strlencmp(cmd, "crt_enable") == 0) {
3965 enable |= TP_ACPI_VIDEO_S_CRT;
3966 } else if (strlencmp(cmd, "crt_disable") == 0) {
3967 disable |= TP_ACPI_VIDEO_S_CRT;
3968 } else if (video_supported == TPACPI_VIDEO_NEW &&
3969 strlencmp(cmd, "dvi_enable") == 0) {
3970 enable |= TP_ACPI_VIDEO_S_DVI;
3971 } else if (video_supported == TPACPI_VIDEO_NEW &&
3972 strlencmp(cmd, "dvi_disable") == 0) {
3973 disable |= TP_ACPI_VIDEO_S_DVI;
3974 } else if (strlencmp(cmd, "auto_enable") == 0) {
3975 res = video_autosw_set(1);
3976 if (res)
3977 return res;
3978 } else if (strlencmp(cmd, "auto_disable") == 0) {
3979 res = video_autosw_set(0);
3980 if (res)
3981 return res;
3982 } else if (strlencmp(cmd, "video_switch") == 0) {
3983 res = video_outputsw_cycle();
3984 if (res)
3985 return res;
3986 } else if (strlencmp(cmd, "expand_toggle") == 0) {
3987 res = video_expand_toggle();
3988 if (res)
3989 return res;
3990 } else
3991 return -EINVAL;
3992 }
3993
3994 if (enable || disable) {
3995 status = video_outputsw_get();
3996 if (status < 0)
3997 return status;
3998 res = video_outputsw_set((status & ~disable) | enable);
3999 if (res)
4000 return res;
4001 }
4002
4003 return 0;
4004 }
4005
4006 static struct ibm_struct video_driver_data = {
4007 .name = "video",
4008 .read = video_read,
4009 .write = video_write,
4010 .exit = video_exit,
4011 };
4012
4013 #endif /* CONFIG_THINKPAD_ACPI_VIDEO */
4014
4015 /*************************************************************************
4016 * Light (thinklight) subdriver
4017 */
4018
4019 TPACPI_HANDLE(lght, root, "\\LGHT"); /* A21e, A2xm/p, T20-22, X20-21 */
4020 TPACPI_HANDLE(ledb, ec, "LEDB"); /* G4x */
4021
4022 static int light_get_status(void)
4023 {
4024 int status = 0;
4025
4026 if (tp_features.light_status) {
4027 if (!acpi_evalf(ec_handle, &status, "KBLT", "d"))
4028 return -EIO;
4029 return (!!status);
4030 }
4031
4032 return -ENXIO;
4033 }
4034
4035 static int light_set_status(int status)
4036 {
4037 int rc;
4038
4039 if (tp_features.light) {
4040 if (cmos_handle) {
4041 rc = acpi_evalf(cmos_handle, NULL, NULL, "vd",
4042 (status)?
4043 TP_CMOS_THINKLIGHT_ON :
4044 TP_CMOS_THINKLIGHT_OFF);
4045 } else {
4046 rc = acpi_evalf(lght_handle, NULL, NULL, "vd",
4047 (status)? 1 : 0);
4048 }
4049 return (rc)? 0 : -EIO;
4050 }
4051
4052 return -ENXIO;
4053 }
4054
4055 static void light_set_status_worker(struct work_struct *work)
4056 {
4057 struct tpacpi_led_classdev *data =
4058 container_of(work, struct tpacpi_led_classdev, work);
4059
4060 if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING))
4061 light_set_status((data->new_state != TPACPI_LED_OFF));
4062 }
4063
4064 static void light_sysfs_set(struct led_classdev *led_cdev,
4065 enum led_brightness brightness)
4066 {
4067 struct tpacpi_led_classdev *data =
4068 container_of(led_cdev,
4069 struct tpacpi_led_classdev,
4070 led_classdev);
4071 data->new_state = (brightness != LED_OFF) ?
4072 TPACPI_LED_ON : TPACPI_LED_OFF;
4073 queue_work(tpacpi_wq, &data->work);
4074 }
4075
4076 static enum led_brightness light_sysfs_get(struct led_classdev *led_cdev)
4077 {
4078 return (light_get_status() == 1)? LED_FULL : LED_OFF;
4079 }
4080
4081 static struct tpacpi_led_classdev tpacpi_led_thinklight = {
4082 .led_classdev = {
4083 .name = "tpacpi::thinklight",
4084 .brightness_set = &light_sysfs_set,
4085 .brightness_get = &light_sysfs_get,
4086 }
4087 };
4088
4089 static int __init light_init(struct ibm_init_struct *iibm)
4090 {
4091 int rc;
4092
4093 vdbg_printk(TPACPI_DBG_INIT, "initializing light subdriver\n");
4094
4095 TPACPI_ACPIHANDLE_INIT(ledb);
4096 TPACPI_ACPIHANDLE_INIT(lght);
4097 TPACPI_ACPIHANDLE_INIT(cmos);
4098 INIT_WORK(&tpacpi_led_thinklight.work, light_set_status_worker);
4099
4100 /* light not supported on 570, 600e/x, 770e, 770x, G4x, R30, R31 */
4101 tp_features.light = (cmos_handle || lght_handle) && !ledb_handle;
4102
4103 if (tp_features.light)
4104 /* light status not supported on
4105 570, 600e/x, 770e, 770x, G4x, R30, R31, R32, X20 */
4106 tp_features.light_status =
4107 acpi_evalf(ec_handle, NULL, "KBLT", "qv");
4108
4109 vdbg_printk(TPACPI_DBG_INIT, "light is %s, light status is %s\n",
4110 str_supported(tp_features.light),
4111 str_supported(tp_features.light_status));
4112
4113 if (!tp_features.light)
4114 return 1;
4115
4116 rc = led_classdev_register(&tpacpi_pdev->dev,
4117 &tpacpi_led_thinklight.led_classdev);
4118
4119 if (rc < 0) {
4120 tp_features.light = 0;
4121 tp_features.light_status = 0;
4122 } else {
4123 rc = 0;
4124 }
4125
4126 return rc;
4127 }
4128
4129 static void light_exit(void)
4130 {
4131 led_classdev_unregister(&tpacpi_led_thinklight.led_classdev);
4132 if (work_pending(&tpacpi_led_thinklight.work))
4133 flush_workqueue(tpacpi_wq);
4134 }
4135
4136 static int light_read(char *p)
4137 {
4138 int len = 0;
4139 int status;
4140
4141 if (!tp_features.light) {
4142 len += sprintf(p + len, "status:\t\tnot supported\n");
4143 } else if (!tp_features.light_status) {
4144 len += sprintf(p + len, "status:\t\tunknown\n");
4145 len += sprintf(p + len, "commands:\ton, off\n");
4146 } else {
4147 status = light_get_status();
4148 if (status < 0)
4149 return status;
4150 len += sprintf(p + len, "status:\t\t%s\n", onoff(status, 0));
4151 len += sprintf(p + len, "commands:\ton, off\n");
4152 }
4153
4154 return len;
4155 }
4156
4157 static int light_write(char *buf)
4158 {
4159 char *cmd;
4160 int newstatus = 0;
4161
4162 if (!tp_features.light)
4163 return -ENODEV;
4164
4165 while ((cmd = next_cmd(&buf))) {
4166 if (strlencmp(cmd, "on") == 0) {
4167 newstatus = 1;
4168 } else if (strlencmp(cmd, "off") == 0) {
4169 newstatus = 0;
4170 } else
4171 return -EINVAL;
4172 }
4173
4174 return light_set_status(newstatus);
4175 }
4176
4177 static struct ibm_struct light_driver_data = {
4178 .name = "light",
4179 .read = light_read,
4180 .write = light_write,
4181 .exit = light_exit,
4182 };
4183
4184 /*************************************************************************
4185 * Dock subdriver
4186 */
4187
4188 #ifdef CONFIG_THINKPAD_ACPI_DOCK
4189
4190 static void dock_notify(struct ibm_struct *ibm, u32 event);
4191 static int dock_read(char *p);
4192 static int dock_write(char *buf);
4193
4194 TPACPI_HANDLE(dock, root, "\\_SB.GDCK", /* X30, X31, X40 */
4195 "\\_SB.PCI0.DOCK", /* 600e/x,770e,770x,A2xm/p,T20-22,X20-21 */
4196 "\\_SB.PCI0.PCI1.DOCK", /* all others */
4197 "\\_SB.PCI.ISA.SLCE", /* 570 */
4198 ); /* A21e,G4x,R30,R31,R32,R40,R40e,R50e */
4199
4200 /* don't list other alternatives as we install a notify handler on the 570 */
4201 TPACPI_HANDLE(pci, root, "\\_SB.PCI"); /* 570 */
4202
4203 static const struct acpi_device_id ibm_pci_device_ids[] = {
4204 {PCI_ROOT_HID_STRING, 0},
4205 {"", 0},
4206 };
4207
4208 static struct tp_acpi_drv_struct ibm_dock_acpidriver[2] = {
4209 {
4210 .notify = dock_notify,
4211 .handle = &dock_handle,
4212 .type = ACPI_SYSTEM_NOTIFY,
4213 },
4214 {
4215 /* THIS ONE MUST NEVER BE USED FOR DRIVER AUTOLOADING.
4216 * We just use it to get notifications of dock hotplug
4217 * in very old thinkpads */
4218 .hid = ibm_pci_device_ids,
4219 .notify = dock_notify,
4220 .handle = &pci_handle,
4221 .type = ACPI_SYSTEM_NOTIFY,
4222 },
4223 };
4224
4225 static struct ibm_struct dock_driver_data[2] = {
4226 {
4227 .name = "dock",
4228 .read = dock_read,
4229 .write = dock_write,
4230 .acpi = &ibm_dock_acpidriver[0],
4231 },
4232 {
4233 .name = "dock",
4234 .acpi = &ibm_dock_acpidriver[1],
4235 },
4236 };
4237
4238 #define dock_docked() (_sta(dock_handle) & 1)
4239
4240 static int __init dock_init(struct ibm_init_struct *iibm)
4241 {
4242 vdbg_printk(TPACPI_DBG_INIT, "initializing dock subdriver\n");
4243
4244 TPACPI_ACPIHANDLE_INIT(dock);
4245
4246 vdbg_printk(TPACPI_DBG_INIT, "dock is %s\n",
4247 str_supported(dock_handle != NULL));
4248
4249 return (dock_handle)? 0 : 1;
4250 }
4251
4252 static int __init dock_init2(struct ibm_init_struct *iibm)
4253 {
4254 int dock2_needed;
4255
4256 vdbg_printk(TPACPI_DBG_INIT, "initializing dock subdriver part 2\n");
4257
4258 if (dock_driver_data[0].flags.acpi_driver_registered &&
4259 dock_driver_data[0].flags.acpi_notify_installed) {
4260 TPACPI_ACPIHANDLE_INIT(pci);
4261 dock2_needed = (pci_handle != NULL);
4262 vdbg_printk(TPACPI_DBG_INIT,
4263 "dock PCI handler for the TP 570 is %s\n",
4264 str_supported(dock2_needed));
4265 } else {
4266 vdbg_printk(TPACPI_DBG_INIT,
4267 "dock subdriver part 2 not required\n");
4268 dock2_needed = 0;
4269 }
4270
4271 return (dock2_needed)? 0 : 1;
4272 }
4273
4274 static void dock_notify(struct ibm_struct *ibm, u32 event)
4275 {
4276 int docked = dock_docked();
4277 int pci = ibm->acpi->hid && ibm->acpi->device &&
4278 acpi_match_device_ids(ibm->acpi->device, ibm_pci_device_ids);
4279 int data;
4280
4281 if (event == 1 && !pci) /* 570 */
4282 data = 1; /* button */
4283 else if (event == 1 && pci) /* 570 */
4284 data = 3; /* dock */
4285 else if (event == 3 && docked)
4286 data = 1; /* button */
4287 else if (event == 3 && !docked)
4288 data = 2; /* undock */
4289 else if (event == 0 && docked)
4290 data = 3; /* dock */
4291 else {
4292 printk(TPACPI_ERR "unknown dock event %d, status %d\n",
4293 event, _sta(dock_handle));
4294 data = 0; /* unknown */
4295 }
4296 acpi_bus_generate_proc_event(ibm->acpi->device, event, data);
4297 acpi_bus_generate_netlink_event(ibm->acpi->device->pnp.device_class,
4298 dev_name(&ibm->acpi->device->dev),
4299 event, data);
4300 }
4301
4302 static int dock_read(char *p)
4303 {
4304 int len = 0;
4305 int docked = dock_docked();
4306
4307 if (!dock_handle)
4308 len += sprintf(p + len, "status:\t\tnot supported\n");
4309 else if (!docked)
4310 len += sprintf(p + len, "status:\t\tundocked\n");
4311 else {
4312 len += sprintf(p + len, "status:\t\tdocked\n");
4313 len += sprintf(p + len, "commands:\tdock, undock\n");
4314 }
4315
4316 return len;
4317 }
4318
4319 static int dock_write(char *buf)
4320 {
4321 char *cmd;
4322
4323 if (!dock_docked())
4324 return -ENODEV;
4325
4326 while ((cmd = next_cmd(&buf))) {
4327 if (strlencmp(cmd, "undock") == 0) {
4328 if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 0) ||
4329 !acpi_evalf(dock_handle, NULL, "_EJ0", "vd", 1))
4330 return -EIO;
4331 } else if (strlencmp(cmd, "dock") == 0) {
4332 if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 1))
4333 return -EIO;
4334 } else
4335 return -EINVAL;
4336 }
4337
4338 return 0;
4339 }
4340
4341 #endif /* CONFIG_THINKPAD_ACPI_DOCK */
4342
4343 /*************************************************************************
4344 * Bay subdriver
4345 */
4346
4347 #ifdef CONFIG_THINKPAD_ACPI_BAY
4348
4349 TPACPI_HANDLE(bay, root, "\\_SB.PCI.IDE.SECN.MAST", /* 570 */
4350 "\\_SB.PCI0.IDE0.IDES.IDSM", /* 600e/x, 770e, 770x */
4351 "\\_SB.PCI0.SATA.SCND.MSTR", /* T60, X60, Z60 */
4352 "\\_SB.PCI0.IDE0.SCND.MSTR", /* all others */
4353 ); /* A21e, R30, R31 */
4354 TPACPI_HANDLE(bay_ej, bay, "_EJ3", /* 600e/x, A2xm/p, A3x */
4355 "_EJ0", /* all others */
4356 ); /* 570,A21e,G4x,R30,R31,R32,R40e,R50e */
4357 TPACPI_HANDLE(bay2, root, "\\_SB.PCI0.IDE0.PRIM.SLAV", /* A3x, R32 */
4358 "\\_SB.PCI0.IDE0.IDEP.IDPS", /* 600e/x, 770e, 770x */
4359 ); /* all others */
4360 TPACPI_HANDLE(bay2_ej, bay2, "_EJ3", /* 600e/x, 770e, A3x */
4361 "_EJ0", /* 770x */
4362 ); /* all others */
4363
4364 static int __init bay_init(struct ibm_init_struct *iibm)
4365 {
4366 vdbg_printk(TPACPI_DBG_INIT, "initializing bay subdriver\n");
4367
4368 TPACPI_ACPIHANDLE_INIT(bay);
4369 if (bay_handle)
4370 TPACPI_ACPIHANDLE_INIT(bay_ej);
4371 TPACPI_ACPIHANDLE_INIT(bay2);
4372 if (bay2_handle)
4373 TPACPI_ACPIHANDLE_INIT(bay2_ej);
4374
4375 tp_features.bay_status = bay_handle &&
4376 acpi_evalf(bay_handle, NULL, "_STA", "qv");
4377 tp_features.bay_status2 = bay2_handle &&
4378 acpi_evalf(bay2_handle, NULL, "_STA", "qv");
4379
4380 tp_features.bay_eject = bay_handle && bay_ej_handle &&
4381 (strlencmp(bay_ej_path, "_EJ0") == 0 || experimental);
4382 tp_features.bay_eject2 = bay2_handle && bay2_ej_handle &&
4383 (strlencmp(bay2_ej_path, "_EJ0") == 0 || experimental);
4384
4385 vdbg_printk(TPACPI_DBG_INIT,
4386 "bay 1: status %s, eject %s; bay 2: status %s, eject %s\n",
4387 str_supported(tp_features.bay_status),
4388 str_supported(tp_features.bay_eject),
4389 str_supported(tp_features.bay_status2),
4390 str_supported(tp_features.bay_eject2));
4391
4392 return (tp_features.bay_status || tp_features.bay_eject ||
4393 tp_features.bay_status2 || tp_features.bay_eject2)? 0 : 1;
4394 }
4395
4396 static void bay_notify(struct ibm_struct *ibm, u32 event)
4397 {
4398 acpi_bus_generate_proc_event(ibm->acpi->device, event, 0);
4399 acpi_bus_generate_netlink_event(ibm->acpi->device->pnp.device_class,
4400 dev_name(&ibm->acpi->device->dev),
4401 event, 0);
4402 }
4403
4404 #define bay_occupied(b) (_sta(b##_handle) & 1)
4405
4406 static int bay_read(char *p)
4407 {
4408 int len = 0;
4409 int occupied = bay_occupied(bay);
4410 int occupied2 = bay_occupied(bay2);
4411 int eject, eject2;
4412
4413 len += sprintf(p + len, "status:\t\t%s\n",
4414 tp_features.bay_status ?
4415 (occupied ? "occupied" : "unoccupied") :
4416 "not supported");
4417 if (tp_features.bay_status2)
4418 len += sprintf(p + len, "status2:\t%s\n", occupied2 ?
4419 "occupied" : "unoccupied");
4420
4421 eject = tp_features.bay_eject && occupied;
4422 eject2 = tp_features.bay_eject2 && occupied2;
4423
4424 if (eject && eject2)
4425 len += sprintf(p + len, "commands:\teject, eject2\n");
4426 else if (eject)
4427 len += sprintf(p + len, "commands:\teject\n");
4428 else if (eject2)
4429 len += sprintf(p + len, "commands:\teject2\n");
4430
4431 return len;
4432 }
4433
4434 static int bay_write(char *buf)
4435 {
4436 char *cmd;
4437
4438 if (!tp_features.bay_eject && !tp_features.bay_eject2)
4439 return -ENODEV;
4440
4441 while ((cmd = next_cmd(&buf))) {
4442 if (tp_features.bay_eject && strlencmp(cmd, "eject") == 0) {
4443 if (!acpi_evalf(bay_ej_handle, NULL, NULL, "vd", 1))
4444 return -EIO;
4445 } else if (tp_features.bay_eject2 &&
4446 strlencmp(cmd, "eject2") == 0) {
4447 if (!acpi_evalf(bay2_ej_handle, NULL, NULL, "vd", 1))
4448 return -EIO;
4449 } else
4450 return -EINVAL;
4451 }
4452
4453 return 0;
4454 }
4455
4456 static struct tp_acpi_drv_struct ibm_bay_acpidriver = {
4457 .notify = bay_notify,
4458 .handle = &bay_handle,
4459 .type = ACPI_SYSTEM_NOTIFY,
4460 };
4461
4462 static struct ibm_struct bay_driver_data = {
4463 .name = "bay",
4464 .read = bay_read,
4465 .write = bay_write,
4466 .acpi = &ibm_bay_acpidriver,
4467 };
4468
4469 #endif /* CONFIG_THINKPAD_ACPI_BAY */
4470
4471 /*************************************************************************
4472 * CMOS subdriver
4473 */
4474
4475 /* sysfs cmos_command -------------------------------------------------- */
4476 static ssize_t cmos_command_store(struct device *dev,
4477 struct device_attribute *attr,
4478 const char *buf, size_t count)
4479 {
4480 unsigned long cmos_cmd;
4481 int res;
4482
4483 if (parse_strtoul(buf, 21, &cmos_cmd))
4484 return -EINVAL;
4485
4486 res = issue_thinkpad_cmos_command(cmos_cmd);
4487 return (res)? res : count;
4488 }
4489
4490 static struct device_attribute dev_attr_cmos_command =
4491 __ATTR(cmos_command, S_IWUSR, NULL, cmos_command_store);
4492
4493 /* --------------------------------------------------------------------- */
4494
4495 static int __init cmos_init(struct ibm_init_struct *iibm)
4496 {
4497 int res;
4498
4499 vdbg_printk(TPACPI_DBG_INIT,
4500 "initializing cmos commands subdriver\n");
4501
4502 TPACPI_ACPIHANDLE_INIT(cmos);
4503
4504 vdbg_printk(TPACPI_DBG_INIT, "cmos commands are %s\n",
4505 str_supported(cmos_handle != NULL));
4506
4507 res = device_create_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
4508 if (res)
4509 return res;
4510
4511 return (cmos_handle)? 0 : 1;
4512 }
4513
4514 static void cmos_exit(void)
4515 {
4516 device_remove_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
4517 }
4518
4519 static int cmos_read(char *p)
4520 {
4521 int len = 0;
4522
4523 /* cmos not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
4524 R30, R31, T20-22, X20-21 */
4525 if (!cmos_handle)
4526 len += sprintf(p + len, "status:\t\tnot supported\n");
4527 else {
4528 len += sprintf(p + len, "status:\t\tsupported\n");
4529 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-21)\n");
4530 }
4531
4532 return len;
4533 }
4534
4535 static int cmos_write(char *buf)
4536 {
4537 char *cmd;
4538 int cmos_cmd, res;
4539
4540 while ((cmd = next_cmd(&buf))) {
4541 if (sscanf(cmd, "%u", &cmos_cmd) == 1 &&
4542 cmos_cmd >= 0 && cmos_cmd <= 21) {
4543 /* cmos_cmd set */
4544 } else
4545 return -EINVAL;
4546
4547 res = issue_thinkpad_cmos_command(cmos_cmd);
4548 if (res)
4549 return res;
4550 }
4551
4552 return 0;
4553 }
4554
4555 static struct ibm_struct cmos_driver_data = {
4556 .name = "cmos",
4557 .read = cmos_read,
4558 .write = cmos_write,
4559 .exit = cmos_exit,
4560 };
4561
4562 /*************************************************************************
4563 * LED subdriver
4564 */
4565
4566 enum led_access_mode {
4567 TPACPI_LED_NONE = 0,
4568 TPACPI_LED_570, /* 570 */
4569 TPACPI_LED_OLD, /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
4570 TPACPI_LED_NEW, /* all others */
4571 };
4572
4573 enum { /* For TPACPI_LED_OLD */
4574 TPACPI_LED_EC_HLCL = 0x0c, /* EC reg to get led to power on */
4575 TPACPI_LED_EC_HLBL = 0x0d, /* EC reg to blink a lit led */
4576 TPACPI_LED_EC_HLMS = 0x0e, /* EC reg to select led to command */
4577 };
4578
4579 static enum led_access_mode led_supported;
4580
4581 TPACPI_HANDLE(led, ec, "SLED", /* 570 */
4582 "SYSL", /* 600e/x, 770e, 770x, A21e, A2xm/p, */
4583 /* T20-22, X20-21 */
4584 "LED", /* all others */
4585 ); /* R30, R31 */
4586
4587 #define TPACPI_LED_NUMLEDS 8
4588 static struct tpacpi_led_classdev *tpacpi_leds;
4589 static enum led_status_t tpacpi_led_state_cache[TPACPI_LED_NUMLEDS];
4590 static const char * const tpacpi_led_names[TPACPI_LED_NUMLEDS] = {
4591 /* there's a limit of 19 chars + NULL before 2.6.26 */
4592 "tpacpi::power",
4593 "tpacpi:orange:batt",
4594 "tpacpi:green:batt",
4595 "tpacpi::dock_active",
4596 "tpacpi::bay_active",
4597 "tpacpi::dock_batt",
4598 "tpacpi::unknown_led",
4599 "tpacpi::standby",
4600 };
4601
4602 static int led_get_status(const unsigned int led)
4603 {
4604 int status;
4605 enum led_status_t led_s;
4606
4607 switch (led_supported) {
4608 case TPACPI_LED_570:
4609 if (!acpi_evalf(ec_handle,
4610 &status, "GLED", "dd", 1 << led))
4611 return -EIO;
4612 led_s = (status == 0)?
4613 TPACPI_LED_OFF :
4614 ((status == 1)?
4615 TPACPI_LED_ON :
4616 TPACPI_LED_BLINK);
4617 tpacpi_led_state_cache[led] = led_s;
4618 return led_s;
4619 default:
4620 return -ENXIO;
4621 }
4622
4623 /* not reached */
4624 }
4625
4626 static int led_set_status(const unsigned int led,
4627 const enum led_status_t ledstatus)
4628 {
4629 /* off, on, blink. Index is led_status_t */
4630 static const unsigned int led_sled_arg1[] = { 0, 1, 3 };
4631 static const unsigned int led_led_arg1[] = { 0, 0x80, 0xc0 };
4632
4633 int rc = 0;
4634
4635 switch (led_supported) {
4636 case TPACPI_LED_570:
4637 /* 570 */
4638 if (led > 7)
4639 return -EINVAL;
4640 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
4641 (1 << led), led_sled_arg1[ledstatus]))
4642 rc = -EIO;
4643 break;
4644 case TPACPI_LED_OLD:
4645 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */
4646 if (led > 7)
4647 return -EINVAL;
4648 rc = ec_write(TPACPI_LED_EC_HLMS, (1 << led));
4649 if (rc >= 0)
4650 rc = ec_write(TPACPI_LED_EC_HLBL,
4651 (ledstatus == TPACPI_LED_BLINK) << led);
4652 if (rc >= 0)
4653 rc = ec_write(TPACPI_LED_EC_HLCL,
4654 (ledstatus != TPACPI_LED_OFF) << led);
4655 break;
4656 case TPACPI_LED_NEW:
4657 /* all others */
4658 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
4659 led, led_led_arg1[ledstatus]))
4660 rc = -EIO;
4661 break;
4662 default:
4663 rc = -ENXIO;
4664 }
4665
4666 if (!rc)
4667 tpacpi_led_state_cache[led] = ledstatus;
4668
4669 return rc;
4670 }
4671
4672 static void led_set_status_worker(struct work_struct *work)
4673 {
4674 struct tpacpi_led_classdev *data =
4675 container_of(work, struct tpacpi_led_classdev, work);
4676
4677 if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING))
4678 led_set_status(data->led, data->new_state);
4679 }
4680
4681 static void led_sysfs_set(struct led_classdev *led_cdev,
4682 enum led_brightness brightness)
4683 {
4684 struct tpacpi_led_classdev *data = container_of(led_cdev,
4685 struct tpacpi_led_classdev, led_classdev);
4686
4687 if (brightness == LED_OFF)
4688 data->new_state = TPACPI_LED_OFF;
4689 else if (tpacpi_led_state_cache[data->led] != TPACPI_LED_BLINK)
4690 data->new_state = TPACPI_LED_ON;
4691 else
4692 data->new_state = TPACPI_LED_BLINK;
4693
4694 queue_work(tpacpi_wq, &data->work);
4695 }
4696
4697 static int led_sysfs_blink_set(struct led_classdev *led_cdev,
4698 unsigned long *delay_on, unsigned long *delay_off)
4699 {
4700 struct tpacpi_led_classdev *data = container_of(led_cdev,
4701 struct tpacpi_led_classdev, led_classdev);
4702
4703 /* Can we choose the flash rate? */
4704 if (*delay_on == 0 && *delay_off == 0) {
4705 /* yes. set them to the hardware blink rate (1 Hz) */
4706 *delay_on = 500; /* ms */
4707 *delay_off = 500; /* ms */
4708 } else if ((*delay_on != 500) || (*delay_off != 500))
4709 return -EINVAL;
4710
4711 data->new_state = TPACPI_LED_BLINK;
4712 queue_work(tpacpi_wq, &data->work);
4713
4714 return 0;
4715 }
4716
4717 static enum led_brightness led_sysfs_get(struct led_classdev *led_cdev)
4718 {
4719 int rc;
4720
4721 struct tpacpi_led_classdev *data = container_of(led_cdev,
4722 struct tpacpi_led_classdev, led_classdev);
4723
4724 rc = led_get_status(data->led);
4725
4726 if (rc == TPACPI_LED_OFF || rc < 0)
4727 rc = LED_OFF; /* no error handling in led class :( */
4728 else
4729 rc = LED_FULL;
4730
4731 return rc;
4732 }
4733
4734 static void led_exit(void)
4735 {
4736 unsigned int i;
4737
4738 for (i = 0; i < TPACPI_LED_NUMLEDS; i++) {
4739 if (tpacpi_leds[i].led_classdev.name)
4740 led_classdev_unregister(&tpacpi_leds[i].led_classdev);
4741 }
4742
4743 kfree(tpacpi_leds);
4744 }
4745
4746 static int __init led_init(struct ibm_init_struct *iibm)
4747 {
4748 unsigned int i;
4749 int rc;
4750
4751 vdbg_printk(TPACPI_DBG_INIT, "initializing LED subdriver\n");
4752
4753 TPACPI_ACPIHANDLE_INIT(led);
4754
4755 if (!led_handle)
4756 /* led not supported on R30, R31 */
4757 led_supported = TPACPI_LED_NONE;
4758 else if (strlencmp(led_path, "SLED") == 0)
4759 /* 570 */
4760 led_supported = TPACPI_LED_570;
4761 else if (strlencmp(led_path, "SYSL") == 0)
4762 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
4763 led_supported = TPACPI_LED_OLD;
4764 else
4765 /* all others */
4766 led_supported = TPACPI_LED_NEW;
4767
4768 vdbg_printk(TPACPI_DBG_INIT, "LED commands are %s, mode %d\n",
4769 str_supported(led_supported), led_supported);
4770
4771 tpacpi_leds = kzalloc(sizeof(*tpacpi_leds) * TPACPI_LED_NUMLEDS,
4772 GFP_KERNEL);
4773 if (!tpacpi_leds) {
4774 printk(TPACPI_ERR "Out of memory for LED data\n");
4775 return -ENOMEM;
4776 }
4777
4778 for (i = 0; i < TPACPI_LED_NUMLEDS; i++) {
4779 tpacpi_leds[i].led = i;
4780
4781 tpacpi_leds[i].led_classdev.brightness_set = &led_sysfs_set;
4782 tpacpi_leds[i].led_classdev.blink_set = &led_sysfs_blink_set;
4783 if (led_supported == TPACPI_LED_570)
4784 tpacpi_leds[i].led_classdev.brightness_get =
4785 &led_sysfs_get;
4786
4787 tpacpi_leds[i].led_classdev.name = tpacpi_led_names[i];
4788
4789 INIT_WORK(&tpacpi_leds[i].work, led_set_status_worker);
4790
4791 rc = led_classdev_register(&tpacpi_pdev->dev,
4792 &tpacpi_leds[i].led_classdev);
4793 if (rc < 0) {
4794 tpacpi_leds[i].led_classdev.name = NULL;
4795 led_exit();
4796 return rc;
4797 }
4798 }
4799
4800 return (led_supported != TPACPI_LED_NONE)? 0 : 1;
4801 }
4802
4803 #define str_led_status(s) \
4804 ((s) == TPACPI_LED_OFF ? "off" : \
4805 ((s) == TPACPI_LED_ON ? "on" : "blinking"))
4806
4807 static int led_read(char *p)
4808 {
4809 int len = 0;
4810
4811 if (!led_supported) {
4812 len += sprintf(p + len, "status:\t\tnot supported\n");
4813 return len;
4814 }
4815 len += sprintf(p + len, "status:\t\tsupported\n");
4816
4817 if (led_supported == TPACPI_LED_570) {
4818 /* 570 */
4819 int i, status;
4820 for (i = 0; i < 8; i++) {
4821 status = led_get_status(i);
4822 if (status < 0)
4823 return -EIO;
4824 len += sprintf(p + len, "%d:\t\t%s\n",
4825 i, str_led_status(status));
4826 }
4827 }
4828
4829 len += sprintf(p + len, "commands:\t"
4830 "<led> on, <led> off, <led> blink (<led> is 0-7)\n");
4831
4832 return len;
4833 }
4834
4835 static int led_write(char *buf)
4836 {
4837 char *cmd;
4838 int led, rc;
4839 enum led_status_t s;
4840
4841 if (!led_supported)
4842 return -ENODEV;
4843
4844 while ((cmd = next_cmd(&buf))) {
4845 if (sscanf(cmd, "%d", &led) != 1 || led < 0 || led > 7)
4846 return -EINVAL;
4847
4848 if (strstr(cmd, "off")) {
4849 s = TPACPI_LED_OFF;
4850 } else if (strstr(cmd, "on")) {
4851 s = TPACPI_LED_ON;
4852 } else if (strstr(cmd, "blink")) {
4853 s = TPACPI_LED_BLINK;
4854 } else {
4855 return -EINVAL;
4856 }
4857
4858 rc = led_set_status(led, s);
4859 if (rc < 0)
4860 return rc;
4861 }
4862
4863 return 0;
4864 }
4865
4866 static struct ibm_struct led_driver_data = {
4867 .name = "led",
4868 .read = led_read,
4869 .write = led_write,
4870 .exit = led_exit,
4871 };
4872
4873 /*************************************************************************
4874 * Beep subdriver
4875 */
4876
4877 TPACPI_HANDLE(beep, ec, "BEEP"); /* all except R30, R31 */
4878
4879 static int __init beep_init(struct ibm_init_struct *iibm)
4880 {
4881 vdbg_printk(TPACPI_DBG_INIT, "initializing beep subdriver\n");
4882
4883 TPACPI_ACPIHANDLE_INIT(beep);
4884
4885 vdbg_printk(TPACPI_DBG_INIT, "beep is %s\n",
4886 str_supported(beep_handle != NULL));
4887
4888 return (beep_handle)? 0 : 1;
4889 }
4890
4891 static int beep_read(char *p)
4892 {
4893 int len = 0;
4894
4895 if (!beep_handle)
4896 len += sprintf(p + len, "status:\t\tnot supported\n");
4897 else {
4898 len += sprintf(p + len, "status:\t\tsupported\n");
4899 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-17)\n");
4900 }
4901
4902 return len;
4903 }
4904
4905 static int beep_write(char *buf)
4906 {
4907 char *cmd;
4908 int beep_cmd;
4909
4910 if (!beep_handle)
4911 return -ENODEV;
4912
4913 while ((cmd = next_cmd(&buf))) {
4914 if (sscanf(cmd, "%u", &beep_cmd) == 1 &&
4915 beep_cmd >= 0 && beep_cmd <= 17) {
4916 /* beep_cmd set */
4917 } else
4918 return -EINVAL;
4919 if (!acpi_evalf(beep_handle, NULL, NULL, "vdd", beep_cmd, 0))
4920 return -EIO;
4921 }
4922
4923 return 0;
4924 }
4925
4926 static struct ibm_struct beep_driver_data = {
4927 .name = "beep",
4928 .read = beep_read,
4929 .write = beep_write,
4930 };
4931
4932 /*************************************************************************
4933 * Thermal subdriver
4934 */
4935
4936 enum thermal_access_mode {
4937 TPACPI_THERMAL_NONE = 0, /* No thermal support */
4938 TPACPI_THERMAL_ACPI_TMP07, /* Use ACPI TMP0-7 */
4939 TPACPI_THERMAL_ACPI_UPDT, /* Use ACPI TMP0-7 with UPDT */
4940 TPACPI_THERMAL_TPEC_8, /* Use ACPI EC regs, 8 sensors */
4941 TPACPI_THERMAL_TPEC_16, /* Use ACPI EC regs, 16 sensors */
4942 };
4943
4944 enum { /* TPACPI_THERMAL_TPEC_* */
4945 TP_EC_THERMAL_TMP0 = 0x78, /* ACPI EC regs TMP 0..7 */
4946 TP_EC_THERMAL_TMP8 = 0xC0, /* ACPI EC regs TMP 8..15 */
4947 TP_EC_THERMAL_TMP_NA = -128, /* ACPI EC sensor not available */
4948 };
4949
4950 #define TPACPI_MAX_THERMAL_SENSORS 16 /* Max thermal sensors supported */
4951 struct ibm_thermal_sensors_struct {
4952 s32 temp[TPACPI_MAX_THERMAL_SENSORS];
4953 };
4954
4955 static enum thermal_access_mode thermal_read_mode;
4956
4957 /* idx is zero-based */
4958 static int thermal_get_sensor(int idx, s32 *value)
4959 {
4960 int t;
4961 s8 tmp;
4962 char tmpi[5];
4963
4964 t = TP_EC_THERMAL_TMP0;
4965
4966 switch (thermal_read_mode) {
4967 #if TPACPI_MAX_THERMAL_SENSORS >= 16
4968 case TPACPI_THERMAL_TPEC_16:
4969 if (idx >= 8 && idx <= 15) {
4970 t = TP_EC_THERMAL_TMP8;
4971 idx -= 8;
4972 }
4973 /* fallthrough */
4974 #endif
4975 case TPACPI_THERMAL_TPEC_8:
4976 if (idx <= 7) {
4977 if (!acpi_ec_read(t + idx, &tmp))
4978 return -EIO;
4979 *value = tmp * 1000;
4980 return 0;
4981 }
4982 break;
4983
4984 case TPACPI_THERMAL_ACPI_UPDT:
4985 if (idx <= 7) {
4986 snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
4987 if (!acpi_evalf(ec_handle, NULL, "UPDT", "v"))
4988 return -EIO;
4989 if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
4990 return -EIO;
4991 *value = (t - 2732) * 100;
4992 return 0;
4993 }
4994 break;
4995
4996 case TPACPI_THERMAL_ACPI_TMP07:
4997 if (idx <= 7) {
4998 snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
4999 if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
5000 return -EIO;
5001 if (t > 127 || t < -127)
5002 t = TP_EC_THERMAL_TMP_NA;
5003 *value = t * 1000;
5004 return 0;
5005 }
5006 break;
5007
5008 case TPACPI_THERMAL_NONE:
5009 default:
5010 return -ENOSYS;
5011 }
5012
5013 return -EINVAL;
5014 }
5015
5016 static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s)
5017 {
5018 int res, i;
5019 int n;
5020
5021 n = 8;
5022 i = 0;
5023
5024 if (!s)
5025 return -EINVAL;
5026
5027 if (thermal_read_mode == TPACPI_THERMAL_TPEC_16)
5028 n = 16;
5029
5030 for (i = 0 ; i < n; i++) {
5031 res = thermal_get_sensor(i, &s->temp[i]);
5032 if (res)
5033 return res;
5034 }
5035
5036 return n;
5037 }
5038
5039 /* sysfs temp##_input -------------------------------------------------- */
5040
5041 static ssize_t thermal_temp_input_show(struct device *dev,
5042 struct device_attribute *attr,
5043 char *buf)
5044 {
5045 struct sensor_device_attribute *sensor_attr =
5046 to_sensor_dev_attr(attr);
5047 int idx = sensor_attr->index;
5048 s32 value;
5049 int res;
5050
5051 res = thermal_get_sensor(idx, &value);
5052 if (res)
5053 return res;
5054 if (value == TP_EC_THERMAL_TMP_NA * 1000)
5055 return -ENXIO;
5056
5057 return snprintf(buf, PAGE_SIZE, "%d\n", value);
5058 }
5059
5060 #define THERMAL_SENSOR_ATTR_TEMP(_idxA, _idxB) \
5061 SENSOR_ATTR(temp##_idxA##_input, S_IRUGO, \
5062 thermal_temp_input_show, NULL, _idxB)
5063
5064 static struct sensor_device_attribute sensor_dev_attr_thermal_temp_input[] = {
5065 THERMAL_SENSOR_ATTR_TEMP(1, 0),
5066 THERMAL_SENSOR_ATTR_TEMP(2, 1),
5067 THERMAL_SENSOR_ATTR_TEMP(3, 2),
5068 THERMAL_SENSOR_ATTR_TEMP(4, 3),
5069 THERMAL_SENSOR_ATTR_TEMP(5, 4),
5070 THERMAL_SENSOR_ATTR_TEMP(6, 5),
5071 THERMAL_SENSOR_ATTR_TEMP(7, 6),
5072 THERMAL_SENSOR_ATTR_TEMP(8, 7),
5073 THERMAL_SENSOR_ATTR_TEMP(9, 8),
5074 THERMAL_SENSOR_ATTR_TEMP(10, 9),
5075 THERMAL_SENSOR_ATTR_TEMP(11, 10),
5076 THERMAL_SENSOR_ATTR_TEMP(12, 11),
5077 THERMAL_SENSOR_ATTR_TEMP(13, 12),
5078 THERMAL_SENSOR_ATTR_TEMP(14, 13),
5079 THERMAL_SENSOR_ATTR_TEMP(15, 14),
5080 THERMAL_SENSOR_ATTR_TEMP(16, 15),
5081 };
5082
5083 #define THERMAL_ATTRS(X) \
5084 &sensor_dev_attr_thermal_temp_input[X].dev_attr.attr
5085
5086 static struct attribute *thermal_temp_input_attr[] = {
5087 THERMAL_ATTRS(8),
5088 THERMAL_ATTRS(9),
5089 THERMAL_ATTRS(10),
5090 THERMAL_ATTRS(11),
5091 THERMAL_ATTRS(12),
5092 THERMAL_ATTRS(13),
5093 THERMAL_ATTRS(14),
5094 THERMAL_ATTRS(15),
5095 THERMAL_ATTRS(0),
5096 THERMAL_ATTRS(1),
5097 THERMAL_ATTRS(2),
5098 THERMAL_ATTRS(3),
5099 THERMAL_ATTRS(4),
5100 THERMAL_ATTRS(5),
5101 THERMAL_ATTRS(6),
5102 THERMAL_ATTRS(7),
5103 NULL
5104 };
5105
5106 static const struct attribute_group thermal_temp_input16_group = {
5107 .attrs = thermal_temp_input_attr
5108 };
5109
5110 static const struct attribute_group thermal_temp_input8_group = {
5111 .attrs = &thermal_temp_input_attr[8]
5112 };
5113
5114 #undef THERMAL_SENSOR_ATTR_TEMP
5115 #undef THERMAL_ATTRS
5116
5117 /* --------------------------------------------------------------------- */
5118
5119 static int __init thermal_init(struct ibm_init_struct *iibm)
5120 {
5121 u8 t, ta1, ta2;
5122 int i;
5123 int acpi_tmp7;
5124 int res;
5125
5126 vdbg_printk(TPACPI_DBG_INIT, "initializing thermal subdriver\n");
5127
5128 acpi_tmp7 = acpi_evalf(ec_handle, NULL, "TMP7", "qv");
5129
5130 if (thinkpad_id.ec_model) {
5131 /*
5132 * Direct EC access mode: sensors at registers
5133 * 0x78-0x7F, 0xC0-0xC7. Registers return 0x00 for
5134 * non-implemented, thermal sensors return 0x80 when
5135 * not available
5136 */
5137
5138 ta1 = ta2 = 0;
5139 for (i = 0; i < 8; i++) {
5140 if (acpi_ec_read(TP_EC_THERMAL_TMP0 + i, &t)) {
5141 ta1 |= t;
5142 } else {
5143 ta1 = 0;
5144 break;
5145 }
5146 if (acpi_ec_read(TP_EC_THERMAL_TMP8 + i, &t)) {
5147 ta2 |= t;
5148 } else {
5149 ta1 = 0;
5150 break;
5151 }
5152 }
5153 if (ta1 == 0) {
5154 /* This is sheer paranoia, but we handle it anyway */
5155 if (acpi_tmp7) {
5156 printk(TPACPI_ERR
5157 "ThinkPad ACPI EC access misbehaving, "
5158 "falling back to ACPI TMPx access "
5159 "mode\n");
5160 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
5161 } else {
5162 printk(TPACPI_ERR
5163 "ThinkPad ACPI EC access misbehaving, "
5164 "disabling thermal sensors access\n");
5165 thermal_read_mode = TPACPI_THERMAL_NONE;
5166 }
5167 } else {
5168 thermal_read_mode =
5169 (ta2 != 0) ?
5170 TPACPI_THERMAL_TPEC_16 : TPACPI_THERMAL_TPEC_8;
5171 }
5172 } else if (acpi_tmp7) {
5173 if (acpi_evalf(ec_handle, NULL, "UPDT", "qv")) {
5174 /* 600e/x, 770e, 770x */
5175 thermal_read_mode = TPACPI_THERMAL_ACPI_UPDT;
5176 } else {
5177 /* Standard ACPI TMPx access, max 8 sensors */
5178 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
5179 }
5180 } else {
5181 /* temperatures not supported on 570, G4x, R30, R31, R32 */
5182 thermal_read_mode = TPACPI_THERMAL_NONE;
5183 }
5184
5185 vdbg_printk(TPACPI_DBG_INIT, "thermal is %s, mode %d\n",
5186 str_supported(thermal_read_mode != TPACPI_THERMAL_NONE),
5187 thermal_read_mode);
5188
5189 switch (thermal_read_mode) {
5190 case TPACPI_THERMAL_TPEC_16:
5191 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
5192 &thermal_temp_input16_group);
5193 if (res)
5194 return res;
5195 break;
5196 case TPACPI_THERMAL_TPEC_8:
5197 case TPACPI_THERMAL_ACPI_TMP07:
5198 case TPACPI_THERMAL_ACPI_UPDT:
5199 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
5200 &thermal_temp_input8_group);
5201 if (res)
5202 return res;
5203 break;
5204 case TPACPI_THERMAL_NONE:
5205 default:
5206 return 1;
5207 }
5208
5209 return 0;
5210 }
5211
5212 static void thermal_exit(void)
5213 {
5214 switch (thermal_read_mode) {
5215 case TPACPI_THERMAL_TPEC_16:
5216 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
5217 &thermal_temp_input16_group);
5218 break;
5219 case TPACPI_THERMAL_TPEC_8:
5220 case TPACPI_THERMAL_ACPI_TMP07:
5221 case TPACPI_THERMAL_ACPI_UPDT:
5222 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
5223 &thermal_temp_input16_group);
5224 break;
5225 case TPACPI_THERMAL_NONE:
5226 default:
5227 break;
5228 }
5229 }
5230
5231 static int thermal_read(char *p)
5232 {
5233 int len = 0;
5234 int n, i;
5235 struct ibm_thermal_sensors_struct t;
5236
5237 n = thermal_get_sensors(&t);
5238 if (unlikely(n < 0))
5239 return n;
5240
5241 len += sprintf(p + len, "temperatures:\t");
5242
5243 if (n > 0) {
5244 for (i = 0; i < (n - 1); i++)
5245 len += sprintf(p + len, "%d ", t.temp[i] / 1000);
5246 len += sprintf(p + len, "%d\n", t.temp[i] / 1000);
5247 } else
5248 len += sprintf(p + len, "not supported\n");
5249
5250 return len;
5251 }
5252
5253 static struct ibm_struct thermal_driver_data = {
5254 .name = "thermal",
5255 .read = thermal_read,
5256 .exit = thermal_exit,
5257 };
5258
5259 /*************************************************************************
5260 * EC Dump subdriver
5261 */
5262
5263 static u8 ecdump_regs[256];
5264
5265 static int ecdump_read(char *p)
5266 {
5267 int len = 0;
5268 int i, j;
5269 u8 v;
5270
5271 len += sprintf(p + len, "EC "
5272 " +00 +01 +02 +03 +04 +05 +06 +07"
5273 " +08 +09 +0a +0b +0c +0d +0e +0f\n");
5274 for (i = 0; i < 256; i += 16) {
5275 len += sprintf(p + len, "EC 0x%02x:", i);
5276 for (j = 0; j < 16; j++) {
5277 if (!acpi_ec_read(i + j, &v))
5278 break;
5279 if (v != ecdump_regs[i + j])
5280 len += sprintf(p + len, " *%02x", v);
5281 else
5282 len += sprintf(p + len, " %02x", v);
5283 ecdump_regs[i + j] = v;
5284 }
5285 len += sprintf(p + len, "\n");
5286 if (j != 16)
5287 break;
5288 }
5289
5290 /* These are way too dangerous to advertise openly... */
5291 #if 0
5292 len += sprintf(p + len, "commands:\t0x<offset> 0x<value>"
5293 " (<offset> is 00-ff, <value> is 00-ff)\n");
5294 len += sprintf(p + len, "commands:\t0x<offset> <value> "
5295 " (<offset> is 00-ff, <value> is 0-255)\n");
5296 #endif
5297 return len;
5298 }
5299
5300 static int ecdump_write(char *buf)
5301 {
5302 char *cmd;
5303 int i, v;
5304
5305 while ((cmd = next_cmd(&buf))) {
5306 if (sscanf(cmd, "0x%x 0x%x", &i, &v) == 2) {
5307 /* i and v set */
5308 } else if (sscanf(cmd, "0x%x %u", &i, &v) == 2) {
5309 /* i and v set */
5310 } else
5311 return -EINVAL;
5312 if (i >= 0 && i < 256 && v >= 0 && v < 256) {
5313 if (!acpi_ec_write(i, v))
5314 return -EIO;
5315 } else
5316 return -EINVAL;
5317 }
5318
5319 return 0;
5320 }
5321
5322 static struct ibm_struct ecdump_driver_data = {
5323 .name = "ecdump",
5324 .read = ecdump_read,
5325 .write = ecdump_write,
5326 .flags.experimental = 1,
5327 };
5328
5329 /*************************************************************************
5330 * Backlight/brightness subdriver
5331 */
5332
5333 #define TPACPI_BACKLIGHT_DEV_NAME "thinkpad_screen"
5334
5335 enum {
5336 TP_EC_BACKLIGHT = 0x31,
5337
5338 /* TP_EC_BACKLIGHT bitmasks */
5339 TP_EC_BACKLIGHT_LVLMSK = 0x1F,
5340 TP_EC_BACKLIGHT_CMDMSK = 0xE0,
5341 TP_EC_BACKLIGHT_MAPSW = 0x20,
5342 };
5343
5344 static struct backlight_device *ibm_backlight_device;
5345 static int brightness_mode;
5346 static unsigned int brightness_enable = 2; /* 2 = auto, 0 = no, 1 = yes */
5347
5348 static struct mutex brightness_mutex;
5349
5350 /*
5351 * ThinkPads can read brightness from two places: EC 0x31, or
5352 * CMOS NVRAM byte 0x5E, bits 0-3.
5353 *
5354 * EC 0x31 has the following layout
5355 * Bit 7: unknown function
5356 * Bit 6: unknown function
5357 * Bit 5: Z: honour scale changes, NZ: ignore scale changes
5358 * Bit 4: must be set to zero to avoid problems
5359 * Bit 3-0: backlight brightness level
5360 *
5361 * brightness_get_raw returns status data in the EC 0x31 layout
5362 */
5363 static int brightness_get_raw(int *status)
5364 {
5365 u8 lec = 0, lcmos = 0, level = 0;
5366
5367 if (brightness_mode & 1) {
5368 if (!acpi_ec_read(TP_EC_BACKLIGHT, &lec))
5369 return -EIO;
5370 level = lec & TP_EC_BACKLIGHT_LVLMSK;
5371 };
5372 if (brightness_mode & 2) {
5373 lcmos = (nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS)
5374 & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
5375 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
5376 lcmos &= (tp_features.bright_16levels)? 0x0f : 0x07;
5377 level = lcmos;
5378 }
5379
5380 if (brightness_mode == 3) {
5381 *status = lec; /* Prefer EC, CMOS is just a backing store */
5382 lec &= TP_EC_BACKLIGHT_LVLMSK;
5383 if (lec == lcmos)
5384 tp_warned.bright_cmos_ec_unsync = 0;
5385 else {
5386 if (!tp_warned.bright_cmos_ec_unsync) {
5387 printk(TPACPI_ERR
5388 "CMOS NVRAM (%u) and EC (%u) do not "
5389 "agree on display brightness level\n",
5390 (unsigned int) lcmos,
5391 (unsigned int) lec);
5392 tp_warned.bright_cmos_ec_unsync = 1;
5393 }
5394 return -EIO;
5395 }
5396 } else {
5397 *status = level;
5398 }
5399
5400 return 0;
5401 }
5402
5403 /* May return EINTR which can always be mapped to ERESTARTSYS */
5404 static int brightness_set(int value)
5405 {
5406 int cmos_cmd, inc, i, res;
5407 int current_value;
5408 int command_bits;
5409
5410 if (value > ((tp_features.bright_16levels)? 15 : 7) ||
5411 value < 0)
5412 return -EINVAL;
5413
5414 res = mutex_lock_killable(&brightness_mutex);
5415 if (res < 0)
5416 return res;
5417
5418 res = brightness_get_raw(&current_value);
5419 if (res < 0)
5420 goto errout;
5421
5422 command_bits = current_value & TP_EC_BACKLIGHT_CMDMSK;
5423 current_value &= TP_EC_BACKLIGHT_LVLMSK;
5424
5425 cmos_cmd = value > current_value ?
5426 TP_CMOS_BRIGHTNESS_UP :
5427 TP_CMOS_BRIGHTNESS_DOWN;
5428 inc = (value > current_value)? 1 : -1;
5429
5430 res = 0;
5431 for (i = current_value; i != value; i += inc) {
5432 if ((brightness_mode & 2) &&
5433 issue_thinkpad_cmos_command(cmos_cmd)) {
5434 res = -EIO;
5435 goto errout;
5436 }
5437 if ((brightness_mode & 1) &&
5438 !acpi_ec_write(TP_EC_BACKLIGHT,
5439 (i + inc) | command_bits)) {
5440 res = -EIO;
5441 goto errout;;
5442 }
5443 }
5444
5445 errout:
5446 mutex_unlock(&brightness_mutex);
5447 return res;
5448 }
5449
5450 /* sysfs backlight class ----------------------------------------------- */
5451
5452 static int brightness_update_status(struct backlight_device *bd)
5453 {
5454 /* it is the backlight class's job (caller) to handle
5455 * EINTR and other errors properly */
5456 return brightness_set(
5457 (bd->props.fb_blank == FB_BLANK_UNBLANK &&
5458 bd->props.power == FB_BLANK_UNBLANK) ?
5459 bd->props.brightness : 0);
5460 }
5461
5462 static int brightness_get(struct backlight_device *bd)
5463 {
5464 int status, res;
5465
5466 res = brightness_get_raw(&status);
5467 if (res < 0)
5468 return 0; /* FIXME: teach backlight about error handling */
5469
5470 return status & TP_EC_BACKLIGHT_LVLMSK;
5471 }
5472
5473 static struct backlight_ops ibm_backlight_data = {
5474 .get_brightness = brightness_get,
5475 .update_status = brightness_update_status,
5476 };
5477
5478 /* --------------------------------------------------------------------- */
5479
5480 static int __init brightness_init(struct ibm_init_struct *iibm)
5481 {
5482 int b;
5483
5484 vdbg_printk(TPACPI_DBG_INIT, "initializing brightness subdriver\n");
5485
5486 mutex_init(&brightness_mutex);
5487
5488 /*
5489 * We always attempt to detect acpi support, so as to switch
5490 * Lenovo Vista BIOS to ACPI brightness mode even if we are not
5491 * going to publish a backlight interface
5492 */
5493 b = tpacpi_check_std_acpi_brightness_support();
5494 if (b > 0) {
5495
5496 if (acpi_video_backlight_support()) {
5497 if (brightness_enable > 1) {
5498 printk(TPACPI_NOTICE
5499 "Standard ACPI backlight interface "
5500 "available, not loading native one.\n");
5501 return 1;
5502 } else if (brightness_enable == 1) {
5503 printk(TPACPI_NOTICE
5504 "Backlight control force enabled, even if standard "
5505 "ACPI backlight interface is available\n");
5506 }
5507 } else {
5508 if (brightness_enable > 1) {
5509 printk(TPACPI_NOTICE
5510 "Standard ACPI backlight interface not "
5511 "available, thinkpad_acpi native "
5512 "brightness control enabled\n");
5513 }
5514 }
5515 }
5516
5517 if (!brightness_enable) {
5518 dbg_printk(TPACPI_DBG_INIT,
5519 "brightness support disabled by "
5520 "module parameter\n");
5521 return 1;
5522 }
5523
5524 if (b > 16) {
5525 printk(TPACPI_ERR
5526 "Unsupported brightness interface, "
5527 "please contact %s\n", TPACPI_MAIL);
5528 return 1;
5529 }
5530 if (b == 16)
5531 tp_features.bright_16levels = 1;
5532
5533 if (!brightness_mode) {
5534 if (thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO)
5535 brightness_mode = 2;
5536 else
5537 brightness_mode = 3;
5538
5539 dbg_printk(TPACPI_DBG_INIT, "selected brightness_mode=%d\n",
5540 brightness_mode);
5541 }
5542
5543 if (brightness_mode > 3)
5544 return -EINVAL;
5545
5546 if (brightness_get_raw(&b) < 0)
5547 return 1;
5548
5549 if (tp_features.bright_16levels)
5550 printk(TPACPI_INFO
5551 "detected a 16-level brightness capable ThinkPad\n");
5552
5553 ibm_backlight_device = backlight_device_register(
5554 TPACPI_BACKLIGHT_DEV_NAME, NULL, NULL,
5555 &ibm_backlight_data);
5556 if (IS_ERR(ibm_backlight_device)) {
5557 printk(TPACPI_ERR "Could not register backlight device\n");
5558 return PTR_ERR(ibm_backlight_device);
5559 }
5560 vdbg_printk(TPACPI_DBG_INIT, "brightness is supported\n");
5561
5562 ibm_backlight_device->props.max_brightness =
5563 (tp_features.bright_16levels)? 15 : 7;
5564 ibm_backlight_device->props.brightness = b & TP_EC_BACKLIGHT_LVLMSK;
5565 backlight_update_status(ibm_backlight_device);
5566
5567 return 0;
5568 }
5569
5570 static void brightness_exit(void)
5571 {
5572 if (ibm_backlight_device) {
5573 vdbg_printk(TPACPI_DBG_EXIT,
5574 "calling backlight_device_unregister()\n");
5575 backlight_device_unregister(ibm_backlight_device);
5576 }
5577 }
5578
5579 static int brightness_read(char *p)
5580 {
5581 int len = 0;
5582 int level;
5583
5584 level = brightness_get(NULL);
5585 if (level < 0) {
5586 len += sprintf(p + len, "level:\t\tunreadable\n");
5587 } else {
5588 len += sprintf(p + len, "level:\t\t%d\n", level);
5589 len += sprintf(p + len, "commands:\tup, down\n");
5590 len += sprintf(p + len, "commands:\tlevel <level>"
5591 " (<level> is 0-%d)\n",
5592 (tp_features.bright_16levels) ? 15 : 7);
5593 }
5594
5595 return len;
5596 }
5597
5598 static int brightness_write(char *buf)
5599 {
5600 int level;
5601 int rc;
5602 char *cmd;
5603 int max_level = (tp_features.bright_16levels) ? 15 : 7;
5604
5605 level = brightness_get(NULL);
5606 if (level < 0)
5607 return level;
5608
5609 while ((cmd = next_cmd(&buf))) {
5610 if (strlencmp(cmd, "up") == 0) {
5611 if (level < max_level)
5612 level++;
5613 } else if (strlencmp(cmd, "down") == 0) {
5614 if (level > 0)
5615 level--;
5616 } else if (sscanf(cmd, "level %d", &level) == 1 &&
5617 level >= 0 && level <= max_level) {
5618 /* new level set */
5619 } else
5620 return -EINVAL;
5621 }
5622
5623 /*
5624 * Now we know what the final level should be, so we try to set it.
5625 * Doing it this way makes the syscall restartable in case of EINTR
5626 */
5627 rc = brightness_set(level);
5628 return (rc == -EINTR)? ERESTARTSYS : rc;
5629 }
5630
5631 static struct ibm_struct brightness_driver_data = {
5632 .name = "brightness",
5633 .read = brightness_read,
5634 .write = brightness_write,
5635 .exit = brightness_exit,
5636 };
5637
5638 /*************************************************************************
5639 * Volume subdriver
5640 */
5641
5642 static int volume_offset = 0x30;
5643
5644 static int volume_read(char *p)
5645 {
5646 int len = 0;
5647 u8 level;
5648
5649 if (!acpi_ec_read(volume_offset, &level)) {
5650 len += sprintf(p + len, "level:\t\tunreadable\n");
5651 } else {
5652 len += sprintf(p + len, "level:\t\t%d\n", level & 0xf);
5653 len += sprintf(p + len, "mute:\t\t%s\n", onoff(level, 6));
5654 len += sprintf(p + len, "commands:\tup, down, mute\n");
5655 len += sprintf(p + len, "commands:\tlevel <level>"
5656 " (<level> is 0-15)\n");
5657 }
5658
5659 return len;
5660 }
5661
5662 static int volume_write(char *buf)
5663 {
5664 int cmos_cmd, inc, i;
5665 u8 level, mute;
5666 int new_level, new_mute;
5667 char *cmd;
5668
5669 while ((cmd = next_cmd(&buf))) {
5670 if (!acpi_ec_read(volume_offset, &level))
5671 return -EIO;
5672 new_mute = mute = level & 0x40;
5673 new_level = level = level & 0xf;
5674
5675 if (strlencmp(cmd, "up") == 0) {
5676 if (mute)
5677 new_mute = 0;
5678 else
5679 new_level = level == 15 ? 15 : level + 1;
5680 } else if (strlencmp(cmd, "down") == 0) {
5681 if (mute)
5682 new_mute = 0;
5683 else
5684 new_level = level == 0 ? 0 : level - 1;
5685 } else if (sscanf(cmd, "level %d", &new_level) == 1 &&
5686 new_level >= 0 && new_level <= 15) {
5687 /* new_level set */
5688 } else if (strlencmp(cmd, "mute") == 0) {
5689 new_mute = 0x40;
5690 } else
5691 return -EINVAL;
5692
5693 if (new_level != level) {
5694 /* mute doesn't change */
5695
5696 cmos_cmd = (new_level > level) ?
5697 TP_CMOS_VOLUME_UP : TP_CMOS_VOLUME_DOWN;
5698 inc = new_level > level ? 1 : -1;
5699
5700 if (mute && (issue_thinkpad_cmos_command(cmos_cmd) ||
5701 !acpi_ec_write(volume_offset, level)))
5702 return -EIO;
5703
5704 for (i = level; i != new_level; i += inc)
5705 if (issue_thinkpad_cmos_command(cmos_cmd) ||
5706 !acpi_ec_write(volume_offset, i + inc))
5707 return -EIO;
5708
5709 if (mute &&
5710 (issue_thinkpad_cmos_command(TP_CMOS_VOLUME_MUTE) ||
5711 !acpi_ec_write(volume_offset, new_level + mute))) {
5712 return -EIO;
5713 }
5714 }
5715
5716 if (new_mute != mute) {
5717 /* level doesn't change */
5718
5719 cmos_cmd = (new_mute) ?
5720 TP_CMOS_VOLUME_MUTE : TP_CMOS_VOLUME_UP;
5721
5722 if (issue_thinkpad_cmos_command(cmos_cmd) ||
5723 !acpi_ec_write(volume_offset, level + new_mute))
5724 return -EIO;
5725 }
5726 }
5727
5728 return 0;
5729 }
5730
5731 static struct ibm_struct volume_driver_data = {
5732 .name = "volume",
5733 .read = volume_read,
5734 .write = volume_write,
5735 };
5736
5737 /*************************************************************************
5738 * Fan subdriver
5739 */
5740
5741 /*
5742 * FAN ACCESS MODES
5743 *
5744 * TPACPI_FAN_RD_ACPI_GFAN:
5745 * ACPI GFAN method: returns fan level
5746 *
5747 * see TPACPI_FAN_WR_ACPI_SFAN
5748 * EC 0x2f (HFSP) not available if GFAN exists
5749 *
5750 * TPACPI_FAN_WR_ACPI_SFAN:
5751 * ACPI SFAN method: sets fan level, 0 (stop) to 7 (max)
5752 *
5753 * EC 0x2f (HFSP) might be available *for reading*, but do not use
5754 * it for writing.
5755 *
5756 * TPACPI_FAN_WR_TPEC:
5757 * ThinkPad EC register 0x2f (HFSP): fan control loop mode
5758 * Supported on almost all ThinkPads
5759 *
5760 * Fan speed changes of any sort (including those caused by the
5761 * disengaged mode) are usually done slowly by the firmware as the
5762 * maximum ammount of fan duty cycle change per second seems to be
5763 * limited.
5764 *
5765 * Reading is not available if GFAN exists.
5766 * Writing is not available if SFAN exists.
5767 *
5768 * Bits
5769 * 7 automatic mode engaged;
5770 * (default operation mode of the ThinkPad)
5771 * fan level is ignored in this mode.
5772 * 6 full speed mode (takes precedence over bit 7);
5773 * not available on all thinkpads. May disable
5774 * the tachometer while the fan controller ramps up
5775 * the speed (which can take up to a few *minutes*).
5776 * Speeds up fan to 100% duty-cycle, which is far above
5777 * the standard RPM levels. It is not impossible that
5778 * it could cause hardware damage.
5779 * 5-3 unused in some models. Extra bits for fan level
5780 * in others, but still useless as all values above
5781 * 7 map to the same speed as level 7 in these models.
5782 * 2-0 fan level (0..7 usually)
5783 * 0x00 = stop
5784 * 0x07 = max (set when temperatures critical)
5785 * Some ThinkPads may have other levels, see
5786 * TPACPI_FAN_WR_ACPI_FANS (X31/X40/X41)
5787 *
5788 * FIRMWARE BUG: on some models, EC 0x2f might not be initialized at
5789 * boot. Apparently the EC does not intialize it, so unless ACPI DSDT
5790 * does so, its initial value is meaningless (0x07).
5791 *
5792 * For firmware bugs, refer to:
5793 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
5794 *
5795 * ----
5796 *
5797 * ThinkPad EC register 0x84 (LSB), 0x85 (MSB):
5798 * Main fan tachometer reading (in RPM)
5799 *
5800 * This register is present on all ThinkPads with a new-style EC, and
5801 * it is known not to be present on the A21m/e, and T22, as there is
5802 * something else in offset 0x84 according to the ACPI DSDT. Other
5803 * ThinkPads from this same time period (and earlier) probably lack the
5804 * tachometer as well.
5805 *
5806 * Unfortunately a lot of ThinkPads with new-style ECs but whose firwmare
5807 * was never fixed by IBM to report the EC firmware version string
5808 * probably support the tachometer (like the early X models), so
5809 * detecting it is quite hard. We need more data to know for sure.
5810 *
5811 * FIRMWARE BUG: always read 0x84 first, otherwise incorrect readings
5812 * might result.
5813 *
5814 * FIRMWARE BUG: may go stale while the EC is switching to full speed
5815 * mode.
5816 *
5817 * For firmware bugs, refer to:
5818 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
5819 *
5820 * TPACPI_FAN_WR_ACPI_FANS:
5821 * ThinkPad X31, X40, X41. Not available in the X60.
5822 *
5823 * FANS ACPI handle: takes three arguments: low speed, medium speed,
5824 * high speed. ACPI DSDT seems to map these three speeds to levels
5825 * as follows: STOP LOW LOW MED MED HIGH HIGH HIGH HIGH
5826 * (this map is stored on FAN0..FAN8 as "0,1,1,2,2,3,3,3,3")
5827 *
5828 * The speeds are stored on handles
5829 * (FANA:FAN9), (FANC:FANB), (FANE:FAND).
5830 *
5831 * There are three default speed sets, acessible as handles:
5832 * FS1L,FS1M,FS1H; FS2L,FS2M,FS2H; FS3L,FS3M,FS3H
5833 *
5834 * ACPI DSDT switches which set is in use depending on various
5835 * factors.
5836 *
5837 * TPACPI_FAN_WR_TPEC is also available and should be used to
5838 * command the fan. The X31/X40/X41 seems to have 8 fan levels,
5839 * but the ACPI tables just mention level 7.
5840 */
5841
5842 enum { /* Fan control constants */
5843 fan_status_offset = 0x2f, /* EC register 0x2f */
5844 fan_rpm_offset = 0x84, /* EC register 0x84: LSB, 0x85 MSB (RPM)
5845 * 0x84 must be read before 0x85 */
5846
5847 TP_EC_FAN_FULLSPEED = 0x40, /* EC fan mode: full speed */
5848 TP_EC_FAN_AUTO = 0x80, /* EC fan mode: auto fan control */
5849
5850 TPACPI_FAN_LAST_LEVEL = 0x100, /* Use cached last-seen fan level */
5851 };
5852
5853 enum fan_status_access_mode {
5854 TPACPI_FAN_NONE = 0, /* No fan status or control */
5855 TPACPI_FAN_RD_ACPI_GFAN, /* Use ACPI GFAN */
5856 TPACPI_FAN_RD_TPEC, /* Use ACPI EC regs 0x2f, 0x84-0x85 */
5857 };
5858
5859 enum fan_control_access_mode {
5860 TPACPI_FAN_WR_NONE = 0, /* No fan control */
5861 TPACPI_FAN_WR_ACPI_SFAN, /* Use ACPI SFAN */
5862 TPACPI_FAN_WR_TPEC, /* Use ACPI EC reg 0x2f */
5863 TPACPI_FAN_WR_ACPI_FANS, /* Use ACPI FANS and EC reg 0x2f */
5864 };
5865
5866 enum fan_control_commands {
5867 TPACPI_FAN_CMD_SPEED = 0x0001, /* speed command */
5868 TPACPI_FAN_CMD_LEVEL = 0x0002, /* level command */
5869 TPACPI_FAN_CMD_ENABLE = 0x0004, /* enable/disable cmd,
5870 * and also watchdog cmd */
5871 };
5872
5873 static int fan_control_allowed;
5874
5875 static enum fan_status_access_mode fan_status_access_mode;
5876 static enum fan_control_access_mode fan_control_access_mode;
5877 static enum fan_control_commands fan_control_commands;
5878
5879 static u8 fan_control_initial_status;
5880 static u8 fan_control_desired_level;
5881 static u8 fan_control_resume_level;
5882 static int fan_watchdog_maxinterval;
5883
5884 static struct mutex fan_mutex;
5885
5886 static void fan_watchdog_fire(struct work_struct *ignored);
5887 static DECLARE_DELAYED_WORK(fan_watchdog_task, fan_watchdog_fire);
5888
5889 TPACPI_HANDLE(fans, ec, "FANS"); /* X31, X40, X41 */
5890 TPACPI_HANDLE(gfan, ec, "GFAN", /* 570 */
5891 "\\FSPD", /* 600e/x, 770e, 770x */
5892 ); /* all others */
5893 TPACPI_HANDLE(sfan, ec, "SFAN", /* 570 */
5894 "JFNS", /* 770x-JL */
5895 ); /* all others */
5896
5897 /*
5898 * Unitialized HFSP quirk: ACPI DSDT and EC fail to initialize the
5899 * HFSP register at boot, so it contains 0x07 but the Thinkpad could
5900 * be in auto mode (0x80).
5901 *
5902 * This is corrected by any write to HFSP either by the driver, or
5903 * by the firmware.
5904 *
5905 * We assume 0x07 really means auto mode while this quirk is active,
5906 * as this is far more likely than the ThinkPad being in level 7,
5907 * which is only used by the firmware during thermal emergencies.
5908 */
5909
5910 static void fan_quirk1_detect(void)
5911 {
5912 /* In some ThinkPads, neither the EC nor the ACPI
5913 * DSDT initialize the HFSP register, and it ends up
5914 * being initially set to 0x07 when it *could* be
5915 * either 0x07 or 0x80.
5916 *
5917 * Enable for TP-1Y (T43), TP-78 (R51e),
5918 * TP-76 (R52), TP-70 (T43, R52), which are known
5919 * to be buggy. */
5920 if (fan_control_initial_status == 0x07) {
5921 switch (thinkpad_id.ec_model) {
5922 case 0x5931: /* TP-1Y */
5923 case 0x3837: /* TP-78 */
5924 case 0x3637: /* TP-76 */
5925 case 0x3037: /* TP-70 */
5926 printk(TPACPI_NOTICE
5927 "fan_init: initial fan status is unknown, "
5928 "assuming it is in auto mode\n");
5929 tp_features.fan_ctrl_status_undef = 1;
5930 ;;
5931 }
5932 }
5933 }
5934
5935 static void fan_quirk1_handle(u8 *fan_status)
5936 {
5937 if (unlikely(tp_features.fan_ctrl_status_undef)) {
5938 if (*fan_status != fan_control_initial_status) {
5939 /* something changed the HFSP regisnter since
5940 * driver init time, so it is not undefined
5941 * anymore */
5942 tp_features.fan_ctrl_status_undef = 0;
5943 } else {
5944 /* Return most likely status. In fact, it
5945 * might be the only possible status */
5946 *fan_status = TP_EC_FAN_AUTO;
5947 }
5948 }
5949 }
5950
5951 /*
5952 * Call with fan_mutex held
5953 */
5954 static void fan_update_desired_level(u8 status)
5955 {
5956 if ((status &
5957 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
5958 if (status > 7)
5959 fan_control_desired_level = 7;
5960 else
5961 fan_control_desired_level = status;
5962 }
5963 }
5964
5965 static int fan_get_status(u8 *status)
5966 {
5967 u8 s;
5968
5969 /* TODO:
5970 * Add TPACPI_FAN_RD_ACPI_FANS ? */
5971
5972 switch (fan_status_access_mode) {
5973 case TPACPI_FAN_RD_ACPI_GFAN:
5974 /* 570, 600e/x, 770e, 770x */
5975
5976 if (unlikely(!acpi_evalf(gfan_handle, &s, NULL, "d")))
5977 return -EIO;
5978
5979 if (likely(status))
5980 *status = s & 0x07;
5981
5982 break;
5983
5984 case TPACPI_FAN_RD_TPEC:
5985 /* all except 570, 600e/x, 770e, 770x */
5986 if (unlikely(!acpi_ec_read(fan_status_offset, &s)))
5987 return -EIO;
5988
5989 if (likely(status)) {
5990 *status = s;
5991 fan_quirk1_handle(status);
5992 }
5993
5994 break;
5995
5996 default:
5997 return -ENXIO;
5998 }
5999
6000 return 0;
6001 }
6002
6003 static int fan_get_status_safe(u8 *status)
6004 {
6005 int rc;
6006 u8 s;
6007
6008 if (mutex_lock_killable(&fan_mutex))
6009 return -ERESTARTSYS;
6010 rc = fan_get_status(&s);
6011 if (!rc)
6012 fan_update_desired_level(s);
6013 mutex_unlock(&fan_mutex);
6014
6015 if (status)
6016 *status = s;
6017
6018 return rc;
6019 }
6020
6021 static int fan_get_speed(unsigned int *speed)
6022 {
6023 u8 hi, lo;
6024
6025 switch (fan_status_access_mode) {
6026 case TPACPI_FAN_RD_TPEC:
6027 /* all except 570, 600e/x, 770e, 770x */
6028 if (unlikely(!acpi_ec_read(fan_rpm_offset, &lo) ||
6029 !acpi_ec_read(fan_rpm_offset + 1, &hi)))
6030 return -EIO;
6031
6032 if (likely(speed))
6033 *speed = (hi << 8) | lo;
6034
6035 break;
6036
6037 default:
6038 return -ENXIO;
6039 }
6040
6041 return 0;
6042 }
6043
6044 static int fan_set_level(int level)
6045 {
6046 if (!fan_control_allowed)
6047 return -EPERM;
6048
6049 switch (fan_control_access_mode) {
6050 case TPACPI_FAN_WR_ACPI_SFAN:
6051 if (level >= 0 && level <= 7) {
6052 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", level))
6053 return -EIO;
6054 } else
6055 return -EINVAL;
6056 break;
6057
6058 case TPACPI_FAN_WR_ACPI_FANS:
6059 case TPACPI_FAN_WR_TPEC:
6060 if (!(level & TP_EC_FAN_AUTO) &&
6061 !(level & TP_EC_FAN_FULLSPEED) &&
6062 ((level < 0) || (level > 7)))
6063 return -EINVAL;
6064
6065 /* safety net should the EC not support AUTO
6066 * or FULLSPEED mode bits and just ignore them */
6067 if (level & TP_EC_FAN_FULLSPEED)
6068 level |= 7; /* safety min speed 7 */
6069 else if (level & TP_EC_FAN_AUTO)
6070 level |= 4; /* safety min speed 4 */
6071
6072 if (!acpi_ec_write(fan_status_offset, level))
6073 return -EIO;
6074 else
6075 tp_features.fan_ctrl_status_undef = 0;
6076 break;
6077
6078 default:
6079 return -ENXIO;
6080 }
6081 return 0;
6082 }
6083
6084 static int fan_set_level_safe(int level)
6085 {
6086 int rc;
6087
6088 if (!fan_control_allowed)
6089 return -EPERM;
6090
6091 if (mutex_lock_killable(&fan_mutex))
6092 return -ERESTARTSYS;
6093
6094 if (level == TPACPI_FAN_LAST_LEVEL)
6095 level = fan_control_desired_level;
6096
6097 rc = fan_set_level(level);
6098 if (!rc)
6099 fan_update_desired_level(level);
6100
6101 mutex_unlock(&fan_mutex);
6102 return rc;
6103 }
6104
6105 static int fan_set_enable(void)
6106 {
6107 u8 s;
6108 int rc;
6109
6110 if (!fan_control_allowed)
6111 return -EPERM;
6112
6113 if (mutex_lock_killable(&fan_mutex))
6114 return -ERESTARTSYS;
6115
6116 switch (fan_control_access_mode) {
6117 case TPACPI_FAN_WR_ACPI_FANS:
6118 case TPACPI_FAN_WR_TPEC:
6119 rc = fan_get_status(&s);
6120 if (rc < 0)
6121 break;
6122
6123 /* Don't go out of emergency fan mode */
6124 if (s != 7) {
6125 s &= 0x07;
6126 s |= TP_EC_FAN_AUTO | 4; /* min fan speed 4 */
6127 }
6128
6129 if (!acpi_ec_write(fan_status_offset, s))
6130 rc = -EIO;
6131 else {
6132 tp_features.fan_ctrl_status_undef = 0;
6133 rc = 0;
6134 }
6135 break;
6136
6137 case TPACPI_FAN_WR_ACPI_SFAN:
6138 rc = fan_get_status(&s);
6139 if (rc < 0)
6140 break;
6141
6142 s &= 0x07;
6143
6144 /* Set fan to at least level 4 */
6145 s |= 4;
6146
6147 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", s))
6148 rc = -EIO;
6149 else
6150 rc = 0;
6151 break;
6152
6153 default:
6154 rc = -ENXIO;
6155 }
6156
6157 mutex_unlock(&fan_mutex);
6158 return rc;
6159 }
6160
6161 static int fan_set_disable(void)
6162 {
6163 int rc;
6164
6165 if (!fan_control_allowed)
6166 return -EPERM;
6167
6168 if (mutex_lock_killable(&fan_mutex))
6169 return -ERESTARTSYS;
6170
6171 rc = 0;
6172 switch (fan_control_access_mode) {
6173 case TPACPI_FAN_WR_ACPI_FANS:
6174 case TPACPI_FAN_WR_TPEC:
6175 if (!acpi_ec_write(fan_status_offset, 0x00))
6176 rc = -EIO;
6177 else {
6178 fan_control_desired_level = 0;
6179 tp_features.fan_ctrl_status_undef = 0;
6180 }
6181 break;
6182
6183 case TPACPI_FAN_WR_ACPI_SFAN:
6184 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", 0x00))
6185 rc = -EIO;
6186 else
6187 fan_control_desired_level = 0;
6188 break;
6189
6190 default:
6191 rc = -ENXIO;
6192 }
6193
6194
6195 mutex_unlock(&fan_mutex);
6196 return rc;
6197 }
6198
6199 static int fan_set_speed(int speed)
6200 {
6201 int rc;
6202
6203 if (!fan_control_allowed)
6204 return -EPERM;
6205
6206 if (mutex_lock_killable(&fan_mutex))
6207 return -ERESTARTSYS;
6208
6209 rc = 0;
6210 switch (fan_control_access_mode) {
6211 case TPACPI_FAN_WR_ACPI_FANS:
6212 if (speed >= 0 && speed <= 65535) {
6213 if (!acpi_evalf(fans_handle, NULL, NULL, "vddd",
6214 speed, speed, speed))
6215 rc = -EIO;
6216 } else
6217 rc = -EINVAL;
6218 break;
6219
6220 default:
6221 rc = -ENXIO;
6222 }
6223
6224 mutex_unlock(&fan_mutex);
6225 return rc;
6226 }
6227
6228 static void fan_watchdog_reset(void)
6229 {
6230 static int fan_watchdog_active;
6231
6232 if (fan_control_access_mode == TPACPI_FAN_WR_NONE)
6233 return;
6234
6235 if (fan_watchdog_active)
6236 cancel_delayed_work(&fan_watchdog_task);
6237
6238 if (fan_watchdog_maxinterval > 0 &&
6239 tpacpi_lifecycle != TPACPI_LIFE_EXITING) {
6240 fan_watchdog_active = 1;
6241 if (!queue_delayed_work(tpacpi_wq, &fan_watchdog_task,
6242 msecs_to_jiffies(fan_watchdog_maxinterval
6243 * 1000))) {
6244 printk(TPACPI_ERR
6245 "failed to queue the fan watchdog, "
6246 "watchdog will not trigger\n");
6247 }
6248 } else
6249 fan_watchdog_active = 0;
6250 }
6251
6252 static void fan_watchdog_fire(struct work_struct *ignored)
6253 {
6254 int rc;
6255
6256 if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
6257 return;
6258
6259 printk(TPACPI_NOTICE "fan watchdog: enabling fan\n");
6260 rc = fan_set_enable();
6261 if (rc < 0) {
6262 printk(TPACPI_ERR "fan watchdog: error %d while enabling fan, "
6263 "will try again later...\n", -rc);
6264 /* reschedule for later */
6265 fan_watchdog_reset();
6266 }
6267 }
6268
6269 /*
6270 * SYSFS fan layout: hwmon compatible (device)
6271 *
6272 * pwm*_enable:
6273 * 0: "disengaged" mode
6274 * 1: manual mode
6275 * 2: native EC "auto" mode (recommended, hardware default)
6276 *
6277 * pwm*: set speed in manual mode, ignored otherwise.
6278 * 0 is level 0; 255 is level 7. Intermediate points done with linear
6279 * interpolation.
6280 *
6281 * fan*_input: tachometer reading, RPM
6282 *
6283 *
6284 * SYSFS fan layout: extensions
6285 *
6286 * fan_watchdog (driver):
6287 * fan watchdog interval in seconds, 0 disables (default), max 120
6288 */
6289
6290 /* sysfs fan pwm1_enable ----------------------------------------------- */
6291 static ssize_t fan_pwm1_enable_show(struct device *dev,
6292 struct device_attribute *attr,
6293 char *buf)
6294 {
6295 int res, mode;
6296 u8 status;
6297
6298 res = fan_get_status_safe(&status);
6299 if (res)
6300 return res;
6301
6302 if (status & TP_EC_FAN_FULLSPEED) {
6303 mode = 0;
6304 } else if (status & TP_EC_FAN_AUTO) {
6305 mode = 2;
6306 } else
6307 mode = 1;
6308
6309 return snprintf(buf, PAGE_SIZE, "%d\n", mode);
6310 }
6311
6312 static ssize_t fan_pwm1_enable_store(struct device *dev,
6313 struct device_attribute *attr,
6314 const char *buf, size_t count)
6315 {
6316 unsigned long t;
6317 int res, level;
6318
6319 if (parse_strtoul(buf, 2, &t))
6320 return -EINVAL;
6321
6322 switch (t) {
6323 case 0:
6324 level = TP_EC_FAN_FULLSPEED;
6325 break;
6326 case 1:
6327 level = TPACPI_FAN_LAST_LEVEL;
6328 break;
6329 case 2:
6330 level = TP_EC_FAN_AUTO;
6331 break;
6332 case 3:
6333 /* reserved for software-controlled auto mode */
6334 return -ENOSYS;
6335 default:
6336 return -EINVAL;
6337 }
6338
6339 res = fan_set_level_safe(level);
6340 if (res == -ENXIO)
6341 return -EINVAL;
6342 else if (res < 0)
6343 return res;
6344
6345 fan_watchdog_reset();
6346
6347 return count;
6348 }
6349
6350 static struct device_attribute dev_attr_fan_pwm1_enable =
6351 __ATTR(pwm1_enable, S_IWUSR | S_IRUGO,
6352 fan_pwm1_enable_show, fan_pwm1_enable_store);
6353
6354 /* sysfs fan pwm1 ------------------------------------------------------ */
6355 static ssize_t fan_pwm1_show(struct device *dev,
6356 struct device_attribute *attr,
6357 char *buf)
6358 {
6359 int res;
6360 u8 status;
6361
6362 res = fan_get_status_safe(&status);
6363 if (res)
6364 return res;
6365
6366 if ((status &
6367 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) != 0)
6368 status = fan_control_desired_level;
6369
6370 if (status > 7)
6371 status = 7;
6372
6373 return snprintf(buf, PAGE_SIZE, "%u\n", (status * 255) / 7);
6374 }
6375
6376 static ssize_t fan_pwm1_store(struct device *dev,
6377 struct device_attribute *attr,
6378 const char *buf, size_t count)
6379 {
6380 unsigned long s;
6381 int rc;
6382 u8 status, newlevel;
6383
6384 if (parse_strtoul(buf, 255, &s))
6385 return -EINVAL;
6386
6387 /* scale down from 0-255 to 0-7 */
6388 newlevel = (s >> 5) & 0x07;
6389
6390 if (mutex_lock_killable(&fan_mutex))
6391 return -ERESTARTSYS;
6392
6393 rc = fan_get_status(&status);
6394 if (!rc && (status &
6395 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
6396 rc = fan_set_level(newlevel);
6397 if (rc == -ENXIO)
6398 rc = -EINVAL;
6399 else if (!rc) {
6400 fan_update_desired_level(newlevel);
6401 fan_watchdog_reset();
6402 }
6403 }
6404
6405 mutex_unlock(&fan_mutex);
6406 return (rc)? rc : count;
6407 }
6408
6409 static struct device_attribute dev_attr_fan_pwm1 =
6410 __ATTR(pwm1, S_IWUSR | S_IRUGO,
6411 fan_pwm1_show, fan_pwm1_store);
6412
6413 /* sysfs fan fan1_input ------------------------------------------------ */
6414 static ssize_t fan_fan1_input_show(struct device *dev,
6415 struct device_attribute *attr,
6416 char *buf)
6417 {
6418 int res;
6419 unsigned int speed;
6420
6421 res = fan_get_speed(&speed);
6422 if (res < 0)
6423 return res;
6424
6425 return snprintf(buf, PAGE_SIZE, "%u\n", speed);
6426 }
6427
6428 static struct device_attribute dev_attr_fan_fan1_input =
6429 __ATTR(fan1_input, S_IRUGO,
6430 fan_fan1_input_show, NULL);
6431
6432 /* sysfs fan fan_watchdog (hwmon driver) ------------------------------- */
6433 static ssize_t fan_fan_watchdog_show(struct device_driver *drv,
6434 char *buf)
6435 {
6436 return snprintf(buf, PAGE_SIZE, "%u\n", fan_watchdog_maxinterval);
6437 }
6438
6439 static ssize_t fan_fan_watchdog_store(struct device_driver *drv,
6440 const char *buf, size_t count)
6441 {
6442 unsigned long t;
6443
6444 if (parse_strtoul(buf, 120, &t))
6445 return -EINVAL;
6446
6447 if (!fan_control_allowed)
6448 return -EPERM;
6449
6450 fan_watchdog_maxinterval = t;
6451 fan_watchdog_reset();
6452
6453 return count;
6454 }
6455
6456 static DRIVER_ATTR(fan_watchdog, S_IWUSR | S_IRUGO,
6457 fan_fan_watchdog_show, fan_fan_watchdog_store);
6458
6459 /* --------------------------------------------------------------------- */
6460 static struct attribute *fan_attributes[] = {
6461 &dev_attr_fan_pwm1_enable.attr, &dev_attr_fan_pwm1.attr,
6462 &dev_attr_fan_fan1_input.attr,
6463 NULL
6464 };
6465
6466 static const struct attribute_group fan_attr_group = {
6467 .attrs = fan_attributes,
6468 };
6469
6470 static int __init fan_init(struct ibm_init_struct *iibm)
6471 {
6472 int rc;
6473
6474 vdbg_printk(TPACPI_DBG_INIT, "initializing fan subdriver\n");
6475
6476 mutex_init(&fan_mutex);
6477 fan_status_access_mode = TPACPI_FAN_NONE;
6478 fan_control_access_mode = TPACPI_FAN_WR_NONE;
6479 fan_control_commands = 0;
6480 fan_watchdog_maxinterval = 0;
6481 tp_features.fan_ctrl_status_undef = 0;
6482 fan_control_desired_level = 7;
6483
6484 TPACPI_ACPIHANDLE_INIT(fans);
6485 TPACPI_ACPIHANDLE_INIT(gfan);
6486 TPACPI_ACPIHANDLE_INIT(sfan);
6487
6488 if (gfan_handle) {
6489 /* 570, 600e/x, 770e, 770x */
6490 fan_status_access_mode = TPACPI_FAN_RD_ACPI_GFAN;
6491 } else {
6492 /* all other ThinkPads: note that even old-style
6493 * ThinkPad ECs supports the fan control register */
6494 if (likely(acpi_ec_read(fan_status_offset,
6495 &fan_control_initial_status))) {
6496 fan_status_access_mode = TPACPI_FAN_RD_TPEC;
6497 fan_quirk1_detect();
6498 } else {
6499 printk(TPACPI_ERR
6500 "ThinkPad ACPI EC access misbehaving, "
6501 "fan status and control unavailable\n");
6502 return 1;
6503 }
6504 }
6505
6506 if (sfan_handle) {
6507 /* 570, 770x-JL */
6508 fan_control_access_mode = TPACPI_FAN_WR_ACPI_SFAN;
6509 fan_control_commands |=
6510 TPACPI_FAN_CMD_LEVEL | TPACPI_FAN_CMD_ENABLE;
6511 } else {
6512 if (!gfan_handle) {
6513 /* gfan without sfan means no fan control */
6514 /* all other models implement TP EC 0x2f control */
6515
6516 if (fans_handle) {
6517 /* X31, X40, X41 */
6518 fan_control_access_mode =
6519 TPACPI_FAN_WR_ACPI_FANS;
6520 fan_control_commands |=
6521 TPACPI_FAN_CMD_SPEED |
6522 TPACPI_FAN_CMD_LEVEL |
6523 TPACPI_FAN_CMD_ENABLE;
6524 } else {
6525 fan_control_access_mode = TPACPI_FAN_WR_TPEC;
6526 fan_control_commands |=
6527 TPACPI_FAN_CMD_LEVEL |
6528 TPACPI_FAN_CMD_ENABLE;
6529 }
6530 }
6531 }
6532
6533 vdbg_printk(TPACPI_DBG_INIT, "fan is %s, modes %d, %d\n",
6534 str_supported(fan_status_access_mode != TPACPI_FAN_NONE ||
6535 fan_control_access_mode != TPACPI_FAN_WR_NONE),
6536 fan_status_access_mode, fan_control_access_mode);
6537
6538 /* fan control master switch */
6539 if (!fan_control_allowed) {
6540 fan_control_access_mode = TPACPI_FAN_WR_NONE;
6541 fan_control_commands = 0;
6542 dbg_printk(TPACPI_DBG_INIT,
6543 "fan control features disabled by parameter\n");
6544 }
6545
6546 /* update fan_control_desired_level */
6547 if (fan_status_access_mode != TPACPI_FAN_NONE)
6548 fan_get_status_safe(NULL);
6549
6550 if (fan_status_access_mode != TPACPI_FAN_NONE ||
6551 fan_control_access_mode != TPACPI_FAN_WR_NONE) {
6552 rc = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
6553 &fan_attr_group);
6554 if (rc < 0)
6555 return rc;
6556
6557 rc = driver_create_file(&tpacpi_hwmon_pdriver.driver,
6558 &driver_attr_fan_watchdog);
6559 if (rc < 0) {
6560 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
6561 &fan_attr_group);
6562 return rc;
6563 }
6564 return 0;
6565 } else
6566 return 1;
6567 }
6568
6569 static void fan_exit(void)
6570 {
6571 vdbg_printk(TPACPI_DBG_EXIT,
6572 "cancelling any pending fan watchdog tasks\n");
6573
6574 /* FIXME: can we really do this unconditionally? */
6575 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj, &fan_attr_group);
6576 driver_remove_file(&tpacpi_hwmon_pdriver.driver,
6577 &driver_attr_fan_watchdog);
6578
6579 cancel_delayed_work(&fan_watchdog_task);
6580 flush_workqueue(tpacpi_wq);
6581 }
6582
6583 static void fan_suspend(pm_message_t state)
6584 {
6585 int rc;
6586
6587 if (!fan_control_allowed)
6588 return;
6589
6590 /* Store fan status in cache */
6591 fan_control_resume_level = 0;
6592 rc = fan_get_status_safe(&fan_control_resume_level);
6593 if (rc < 0)
6594 printk(TPACPI_NOTICE
6595 "failed to read fan level for later "
6596 "restore during resume: %d\n", rc);
6597
6598 /* if it is undefined, don't attempt to restore it.
6599 * KEEP THIS LAST */
6600 if (tp_features.fan_ctrl_status_undef)
6601 fan_control_resume_level = 0;
6602 }
6603
6604 static void fan_resume(void)
6605 {
6606 u8 current_level = 7;
6607 bool do_set = false;
6608 int rc;
6609
6610 /* DSDT *always* updates status on resume */
6611 tp_features.fan_ctrl_status_undef = 0;
6612
6613 if (!fan_control_allowed ||
6614 !fan_control_resume_level ||
6615 (fan_get_status_safe(&current_level) < 0))
6616 return;
6617
6618 switch (fan_control_access_mode) {
6619 case TPACPI_FAN_WR_ACPI_SFAN:
6620 /* never decrease fan level */
6621 do_set = (fan_control_resume_level > current_level);
6622 break;
6623 case TPACPI_FAN_WR_ACPI_FANS:
6624 case TPACPI_FAN_WR_TPEC:
6625 /* never decrease fan level, scale is:
6626 * TP_EC_FAN_FULLSPEED > 7 >= TP_EC_FAN_AUTO
6627 *
6628 * We expect the firmware to set either 7 or AUTO, but we
6629 * handle FULLSPEED out of paranoia.
6630 *
6631 * So, we can safely only restore FULLSPEED or 7, anything
6632 * else could slow the fan. Restoring AUTO is useless, at
6633 * best that's exactly what the DSDT already set (it is the
6634 * slower it uses).
6635 *
6636 * Always keep in mind that the DSDT *will* have set the
6637 * fans to what the vendor supposes is the best level. We
6638 * muck with it only to speed the fan up.
6639 */
6640 if (fan_control_resume_level != 7 &&
6641 !(fan_control_resume_level & TP_EC_FAN_FULLSPEED))
6642 return;
6643 else
6644 do_set = !(current_level & TP_EC_FAN_FULLSPEED) &&
6645 (current_level != fan_control_resume_level);
6646 break;
6647 default:
6648 return;
6649 }
6650 if (do_set) {
6651 printk(TPACPI_NOTICE
6652 "restoring fan level to 0x%02x\n",
6653 fan_control_resume_level);
6654 rc = fan_set_level_safe(fan_control_resume_level);
6655 if (rc < 0)
6656 printk(TPACPI_NOTICE
6657 "failed to restore fan level: %d\n", rc);
6658 }
6659 }
6660
6661 static int fan_read(char *p)
6662 {
6663 int len = 0;
6664 int rc;
6665 u8 status;
6666 unsigned int speed = 0;
6667
6668 switch (fan_status_access_mode) {
6669 case TPACPI_FAN_RD_ACPI_GFAN:
6670 /* 570, 600e/x, 770e, 770x */
6671 rc = fan_get_status_safe(&status);
6672 if (rc < 0)
6673 return rc;
6674
6675 len += sprintf(p + len, "status:\t\t%s\n"
6676 "level:\t\t%d\n",
6677 (status != 0) ? "enabled" : "disabled", status);
6678 break;
6679
6680 case TPACPI_FAN_RD_TPEC:
6681 /* all except 570, 600e/x, 770e, 770x */
6682 rc = fan_get_status_safe(&status);
6683 if (rc < 0)
6684 return rc;
6685
6686 len += sprintf(p + len, "status:\t\t%s\n",
6687 (status != 0) ? "enabled" : "disabled");
6688
6689 rc = fan_get_speed(&speed);
6690 if (rc < 0)
6691 return rc;
6692
6693 len += sprintf(p + len, "speed:\t\t%d\n", speed);
6694
6695 if (status & TP_EC_FAN_FULLSPEED)
6696 /* Disengaged mode takes precedence */
6697 len += sprintf(p + len, "level:\t\tdisengaged\n");
6698 else if (status & TP_EC_FAN_AUTO)
6699 len += sprintf(p + len, "level:\t\tauto\n");
6700 else
6701 len += sprintf(p + len, "level:\t\t%d\n", status);
6702 break;
6703
6704 case TPACPI_FAN_NONE:
6705 default:
6706 len += sprintf(p + len, "status:\t\tnot supported\n");
6707 }
6708
6709 if (fan_control_commands & TPACPI_FAN_CMD_LEVEL) {
6710 len += sprintf(p + len, "commands:\tlevel <level>");
6711
6712 switch (fan_control_access_mode) {
6713 case TPACPI_FAN_WR_ACPI_SFAN:
6714 len += sprintf(p + len, " (<level> is 0-7)\n");
6715 break;
6716
6717 default:
6718 len += sprintf(p + len, " (<level> is 0-7, "
6719 "auto, disengaged, full-speed)\n");
6720 break;
6721 }
6722 }
6723
6724 if (fan_control_commands & TPACPI_FAN_CMD_ENABLE)
6725 len += sprintf(p + len, "commands:\tenable, disable\n"
6726 "commands:\twatchdog <timeout> (<timeout> "
6727 "is 0 (off), 1-120 (seconds))\n");
6728
6729 if (fan_control_commands & TPACPI_FAN_CMD_SPEED)
6730 len += sprintf(p + len, "commands:\tspeed <speed>"
6731 " (<speed> is 0-65535)\n");
6732
6733 return len;
6734 }
6735
6736 static int fan_write_cmd_level(const char *cmd, int *rc)
6737 {
6738 int level;
6739
6740 if (strlencmp(cmd, "level auto") == 0)
6741 level = TP_EC_FAN_AUTO;
6742 else if ((strlencmp(cmd, "level disengaged") == 0) |
6743 (strlencmp(cmd, "level full-speed") == 0))
6744 level = TP_EC_FAN_FULLSPEED;
6745 else if (sscanf(cmd, "level %d", &level) != 1)
6746 return 0;
6747
6748 *rc = fan_set_level_safe(level);
6749 if (*rc == -ENXIO)
6750 printk(TPACPI_ERR "level command accepted for unsupported "
6751 "access mode %d", fan_control_access_mode);
6752
6753 return 1;
6754 }
6755
6756 static int fan_write_cmd_enable(const char *cmd, int *rc)
6757 {
6758 if (strlencmp(cmd, "enable") != 0)
6759 return 0;
6760
6761 *rc = fan_set_enable();
6762 if (*rc == -ENXIO)
6763 printk(TPACPI_ERR "enable command accepted for unsupported "
6764 "access mode %d", fan_control_access_mode);
6765
6766 return 1;
6767 }
6768
6769 static int fan_write_cmd_disable(const char *cmd, int *rc)
6770 {
6771 if (strlencmp(cmd, "disable") != 0)
6772 return 0;
6773
6774 *rc = fan_set_disable();
6775 if (*rc == -ENXIO)
6776 printk(TPACPI_ERR "disable command accepted for unsupported "
6777 "access mode %d", fan_control_access_mode);
6778
6779 return 1;
6780 }
6781
6782 static int fan_write_cmd_speed(const char *cmd, int *rc)
6783 {
6784 int speed;
6785
6786 /* TODO:
6787 * Support speed <low> <medium> <high> ? */
6788
6789 if (sscanf(cmd, "speed %d", &speed) != 1)
6790 return 0;
6791
6792 *rc = fan_set_speed(speed);
6793 if (*rc == -ENXIO)
6794 printk(TPACPI_ERR "speed command accepted for unsupported "
6795 "access mode %d", fan_control_access_mode);
6796
6797 return 1;
6798 }
6799
6800 static int fan_write_cmd_watchdog(const char *cmd, int *rc)
6801 {
6802 int interval;
6803
6804 if (sscanf(cmd, "watchdog %d", &interval) != 1)
6805 return 0;
6806
6807 if (interval < 0 || interval > 120)
6808 *rc = -EINVAL;
6809 else
6810 fan_watchdog_maxinterval = interval;
6811
6812 return 1;
6813 }
6814
6815 static int fan_write(char *buf)
6816 {
6817 char *cmd;
6818 int rc = 0;
6819
6820 while (!rc && (cmd = next_cmd(&buf))) {
6821 if (!((fan_control_commands & TPACPI_FAN_CMD_LEVEL) &&
6822 fan_write_cmd_level(cmd, &rc)) &&
6823 !((fan_control_commands & TPACPI_FAN_CMD_ENABLE) &&
6824 (fan_write_cmd_enable(cmd, &rc) ||
6825 fan_write_cmd_disable(cmd, &rc) ||
6826 fan_write_cmd_watchdog(cmd, &rc))) &&
6827 !((fan_control_commands & TPACPI_FAN_CMD_SPEED) &&
6828 fan_write_cmd_speed(cmd, &rc))
6829 )
6830 rc = -EINVAL;
6831 else if (!rc)
6832 fan_watchdog_reset();
6833 }
6834
6835 return rc;
6836 }
6837
6838 static struct ibm_struct fan_driver_data = {
6839 .name = "fan",
6840 .read = fan_read,
6841 .write = fan_write,
6842 .exit = fan_exit,
6843 .suspend = fan_suspend,
6844 .resume = fan_resume,
6845 };
6846
6847 /****************************************************************************
6848 ****************************************************************************
6849 *
6850 * Infrastructure
6851 *
6852 ****************************************************************************
6853 ****************************************************************************/
6854
6855 /* sysfs name ---------------------------------------------------------- */
6856 static ssize_t thinkpad_acpi_pdev_name_show(struct device *dev,
6857 struct device_attribute *attr,
6858 char *buf)
6859 {
6860 return snprintf(buf, PAGE_SIZE, "%s\n", TPACPI_NAME);
6861 }
6862
6863 static struct device_attribute dev_attr_thinkpad_acpi_pdev_name =
6864 __ATTR(name, S_IRUGO, thinkpad_acpi_pdev_name_show, NULL);
6865
6866 /* --------------------------------------------------------------------- */
6867
6868 /* /proc support */
6869 static struct proc_dir_entry *proc_dir;
6870
6871 /*
6872 * Module and infrastructure proble, init and exit handling
6873 */
6874
6875 static int force_load;
6876
6877 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
6878 static const char * __init str_supported(int is_supported)
6879 {
6880 static char text_unsupported[] __initdata = "not supported";
6881
6882 return (is_supported)? &text_unsupported[4] : &text_unsupported[0];
6883 }
6884 #endif /* CONFIG_THINKPAD_ACPI_DEBUG */
6885
6886 static void ibm_exit(struct ibm_struct *ibm)
6887 {
6888 dbg_printk(TPACPI_DBG_EXIT, "removing %s\n", ibm->name);
6889
6890 list_del_init(&ibm->all_drivers);
6891
6892 if (ibm->flags.acpi_notify_installed) {
6893 dbg_printk(TPACPI_DBG_EXIT,
6894 "%s: acpi_remove_notify_handler\n", ibm->name);
6895 BUG_ON(!ibm->acpi);
6896 acpi_remove_notify_handler(*ibm->acpi->handle,
6897 ibm->acpi->type,
6898 dispatch_acpi_notify);
6899 ibm->flags.acpi_notify_installed = 0;
6900 ibm->flags.acpi_notify_installed = 0;
6901 }
6902
6903 if (ibm->flags.proc_created) {
6904 dbg_printk(TPACPI_DBG_EXIT,
6905 "%s: remove_proc_entry\n", ibm->name);
6906 remove_proc_entry(ibm->name, proc_dir);
6907 ibm->flags.proc_created = 0;
6908 }
6909
6910 if (ibm->flags.acpi_driver_registered) {
6911 dbg_printk(TPACPI_DBG_EXIT,
6912 "%s: acpi_bus_unregister_driver\n", ibm->name);
6913 BUG_ON(!ibm->acpi);
6914 acpi_bus_unregister_driver(ibm->acpi->driver);
6915 kfree(ibm->acpi->driver);
6916 ibm->acpi->driver = NULL;
6917 ibm->flags.acpi_driver_registered = 0;
6918 }
6919
6920 if (ibm->flags.init_called && ibm->exit) {
6921 ibm->exit();
6922 ibm->flags.init_called = 0;
6923 }
6924
6925 dbg_printk(TPACPI_DBG_INIT, "finished removing %s\n", ibm->name);
6926 }
6927
6928 static int __init ibm_init(struct ibm_init_struct *iibm)
6929 {
6930 int ret;
6931 struct ibm_struct *ibm = iibm->data;
6932 struct proc_dir_entry *entry;
6933
6934 BUG_ON(ibm == NULL);
6935
6936 INIT_LIST_HEAD(&ibm->all_drivers);
6937
6938 if (ibm->flags.experimental && !experimental)
6939 return 0;
6940
6941 dbg_printk(TPACPI_DBG_INIT,
6942 "probing for %s\n", ibm->name);
6943
6944 if (iibm->init) {
6945 ret = iibm->init(iibm);
6946 if (ret > 0)
6947 return 0; /* probe failed */
6948 if (ret)
6949 return ret;
6950
6951 ibm->flags.init_called = 1;
6952 }
6953
6954 if (ibm->acpi) {
6955 if (ibm->acpi->hid) {
6956 ret = register_tpacpi_subdriver(ibm);
6957 if (ret)
6958 goto err_out;
6959 }
6960
6961 if (ibm->acpi->notify) {
6962 ret = setup_acpi_notify(ibm);
6963 if (ret == -ENODEV) {
6964 printk(TPACPI_NOTICE "disabling subdriver %s\n",
6965 ibm->name);
6966 ret = 0;
6967 goto err_out;
6968 }
6969 if (ret < 0)
6970 goto err_out;
6971 }
6972 }
6973
6974 dbg_printk(TPACPI_DBG_INIT,
6975 "%s installed\n", ibm->name);
6976
6977 if (ibm->read) {
6978 entry = create_proc_entry(ibm->name,
6979 S_IFREG | S_IRUGO | S_IWUSR,
6980 proc_dir);
6981 if (!entry) {
6982 printk(TPACPI_ERR "unable to create proc entry %s\n",
6983 ibm->name);
6984 ret = -ENODEV;
6985 goto err_out;
6986 }
6987 entry->owner = THIS_MODULE;
6988 entry->data = ibm;
6989 entry->read_proc = &dispatch_procfs_read;
6990 if (ibm->write)
6991 entry->write_proc = &dispatch_procfs_write;
6992 ibm->flags.proc_created = 1;
6993 }
6994
6995 list_add_tail(&ibm->all_drivers, &tpacpi_all_drivers);
6996
6997 return 0;
6998
6999 err_out:
7000 dbg_printk(TPACPI_DBG_INIT,
7001 "%s: at error exit path with result %d\n",
7002 ibm->name, ret);
7003
7004 ibm_exit(ibm);
7005 return (ret < 0)? ret : 0;
7006 }
7007
7008 /* Probing */
7009
7010 /* returns 0 - probe ok, or < 0 - probe error.
7011 * Probe ok doesn't mean thinkpad found.
7012 * On error, kfree() cleanup on tp->* is not performed, caller must do it */
7013 static int __must_check __init get_thinkpad_model_data(
7014 struct thinkpad_id_data *tp)
7015 {
7016 const struct dmi_device *dev = NULL;
7017 char ec_fw_string[18];
7018 char const *s;
7019
7020 if (!tp)
7021 return -EINVAL;
7022
7023 memset(tp, 0, sizeof(*tp));
7024
7025 if (dmi_name_in_vendors("IBM"))
7026 tp->vendor = PCI_VENDOR_ID_IBM;
7027 else if (dmi_name_in_vendors("LENOVO"))
7028 tp->vendor = PCI_VENDOR_ID_LENOVO;
7029 else
7030 return 0;
7031
7032 s = dmi_get_system_info(DMI_BIOS_VERSION);
7033 tp->bios_version_str = kstrdup(s, GFP_KERNEL);
7034 if (s && !tp->bios_version_str)
7035 return -ENOMEM;
7036 if (!tp->bios_version_str)
7037 return 0;
7038 tp->bios_model = tp->bios_version_str[0]
7039 | (tp->bios_version_str[1] << 8);
7040
7041 /*
7042 * ThinkPad T23 or newer, A31 or newer, R50e or newer,
7043 * X32 or newer, all Z series; Some models must have an
7044 * up-to-date BIOS or they will not be detected.
7045 *
7046 * See http://thinkwiki.org/wiki/List_of_DMI_IDs
7047 */
7048 while ((dev = dmi_find_device(DMI_DEV_TYPE_OEM_STRING, NULL, dev))) {
7049 if (sscanf(dev->name,
7050 "IBM ThinkPad Embedded Controller -[%17c",
7051 ec_fw_string) == 1) {
7052 ec_fw_string[sizeof(ec_fw_string) - 1] = 0;
7053 ec_fw_string[strcspn(ec_fw_string, " ]")] = 0;
7054
7055 tp->ec_version_str = kstrdup(ec_fw_string, GFP_KERNEL);
7056 if (!tp->ec_version_str)
7057 return -ENOMEM;
7058 tp->ec_model = ec_fw_string[0]
7059 | (ec_fw_string[1] << 8);
7060 break;
7061 }
7062 }
7063
7064 s = dmi_get_system_info(DMI_PRODUCT_VERSION);
7065 if (s && !strnicmp(s, "ThinkPad", 8)) {
7066 tp->model_str = kstrdup(s, GFP_KERNEL);
7067 if (!tp->model_str)
7068 return -ENOMEM;
7069 }
7070
7071 s = dmi_get_system_info(DMI_PRODUCT_NAME);
7072 tp->nummodel_str = kstrdup(s, GFP_KERNEL);
7073 if (s && !tp->nummodel_str)
7074 return -ENOMEM;
7075
7076 return 0;
7077 }
7078
7079 static int __init probe_for_thinkpad(void)
7080 {
7081 int is_thinkpad;
7082
7083 if (acpi_disabled)
7084 return -ENODEV;
7085
7086 /*
7087 * Non-ancient models have better DMI tagging, but very old models
7088 * don't.
7089 */
7090 is_thinkpad = (thinkpad_id.model_str != NULL);
7091
7092 /* ec is required because many other handles are relative to it */
7093 TPACPI_ACPIHANDLE_INIT(ec);
7094 if (!ec_handle) {
7095 if (is_thinkpad)
7096 printk(TPACPI_ERR
7097 "Not yet supported ThinkPad detected!\n");
7098 return -ENODEV;
7099 }
7100
7101 /*
7102 * Risks a regression on very old machines, but reduces potential
7103 * false positives a damn great deal
7104 */
7105 if (!is_thinkpad)
7106 is_thinkpad = (thinkpad_id.vendor == PCI_VENDOR_ID_IBM);
7107
7108 if (!is_thinkpad && !force_load)
7109 return -ENODEV;
7110
7111 return 0;
7112 }
7113
7114
7115 /* Module init, exit, parameters */
7116
7117 static struct ibm_init_struct ibms_init[] __initdata = {
7118 {
7119 .init = thinkpad_acpi_driver_init,
7120 .data = &thinkpad_acpi_driver_data,
7121 },
7122 {
7123 .init = hotkey_init,
7124 .data = &hotkey_driver_data,
7125 },
7126 {
7127 .init = bluetooth_init,
7128 .data = &bluetooth_driver_data,
7129 },
7130 {
7131 .init = wan_init,
7132 .data = &wan_driver_data,
7133 },
7134 {
7135 .init = uwb_init,
7136 .data = &uwb_driver_data,
7137 },
7138 #ifdef CONFIG_THINKPAD_ACPI_VIDEO
7139 {
7140 .init = video_init,
7141 .data = &video_driver_data,
7142 },
7143 #endif
7144 {
7145 .init = light_init,
7146 .data = &light_driver_data,
7147 },
7148 #ifdef CONFIG_THINKPAD_ACPI_DOCK
7149 {
7150 .init = dock_init,
7151 .data = &dock_driver_data[0],
7152 },
7153 {
7154 .init = dock_init2,
7155 .data = &dock_driver_data[1],
7156 },
7157 #endif
7158 #ifdef CONFIG_THINKPAD_ACPI_BAY
7159 {
7160 .init = bay_init,
7161 .data = &bay_driver_data,
7162 },
7163 #endif
7164 {
7165 .init = cmos_init,
7166 .data = &cmos_driver_data,
7167 },
7168 {
7169 .init = led_init,
7170 .data = &led_driver_data,
7171 },
7172 {
7173 .init = beep_init,
7174 .data = &beep_driver_data,
7175 },
7176 {
7177 .init = thermal_init,
7178 .data = &thermal_driver_data,
7179 },
7180 {
7181 .data = &ecdump_driver_data,
7182 },
7183 {
7184 .init = brightness_init,
7185 .data = &brightness_driver_data,
7186 },
7187 {
7188 .data = &volume_driver_data,
7189 },
7190 {
7191 .init = fan_init,
7192 .data = &fan_driver_data,
7193 },
7194 };
7195
7196 static int __init set_ibm_param(const char *val, struct kernel_param *kp)
7197 {
7198 unsigned int i;
7199 struct ibm_struct *ibm;
7200
7201 if (!kp || !kp->name || !val)
7202 return -EINVAL;
7203
7204 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
7205 ibm = ibms_init[i].data;
7206 WARN_ON(ibm == NULL);
7207
7208 if (!ibm || !ibm->name)
7209 continue;
7210
7211 if (strcmp(ibm->name, kp->name) == 0 && ibm->write) {
7212 if (strlen(val) > sizeof(ibms_init[i].param) - 2)
7213 return -ENOSPC;
7214 strcpy(ibms_init[i].param, val);
7215 strcat(ibms_init[i].param, ",");
7216 return 0;
7217 }
7218 }
7219
7220 return -EINVAL;
7221 }
7222
7223 module_param(experimental, int, 0);
7224 MODULE_PARM_DESC(experimental,
7225 "Enables experimental features when non-zero");
7226
7227 module_param_named(debug, dbg_level, uint, 0);
7228 MODULE_PARM_DESC(debug, "Sets debug level bit-mask");
7229
7230 module_param(force_load, bool, 0);
7231 MODULE_PARM_DESC(force_load,
7232 "Attempts to load the driver even on a "
7233 "mis-identified ThinkPad when true");
7234
7235 module_param_named(fan_control, fan_control_allowed, bool, 0);
7236 MODULE_PARM_DESC(fan_control,
7237 "Enables setting fan parameters features when true");
7238
7239 module_param_named(brightness_mode, brightness_mode, int, 0);
7240 MODULE_PARM_DESC(brightness_mode,
7241 "Selects brightness control strategy: "
7242 "0=auto, 1=EC, 2=CMOS, 3=both");
7243
7244 module_param(brightness_enable, uint, 0);
7245 MODULE_PARM_DESC(brightness_enable,
7246 "Enables backlight control when 1, disables when 0");
7247
7248 module_param(hotkey_report_mode, uint, 0);
7249 MODULE_PARM_DESC(hotkey_report_mode,
7250 "used for backwards compatibility with userspace, "
7251 "see documentation");
7252
7253 #define TPACPI_PARAM(feature) \
7254 module_param_call(feature, set_ibm_param, NULL, NULL, 0); \
7255 MODULE_PARM_DESC(feature, "Simulates thinkpad-acpi procfs command " \
7256 "at module load, see documentation")
7257
7258 TPACPI_PARAM(hotkey);
7259 TPACPI_PARAM(bluetooth);
7260 TPACPI_PARAM(video);
7261 TPACPI_PARAM(light);
7262 #ifdef CONFIG_THINKPAD_ACPI_DOCK
7263 TPACPI_PARAM(dock);
7264 #endif
7265 #ifdef CONFIG_THINKPAD_ACPI_BAY
7266 TPACPI_PARAM(bay);
7267 #endif /* CONFIG_THINKPAD_ACPI_BAY */
7268 TPACPI_PARAM(cmos);
7269 TPACPI_PARAM(led);
7270 TPACPI_PARAM(beep);
7271 TPACPI_PARAM(ecdump);
7272 TPACPI_PARAM(brightness);
7273 TPACPI_PARAM(volume);
7274 TPACPI_PARAM(fan);
7275
7276 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
7277 module_param(dbg_wlswemul, uint, 0);
7278 MODULE_PARM_DESC(dbg_wlswemul, "Enables WLSW emulation");
7279 module_param_named(wlsw_state, tpacpi_wlsw_emulstate, bool, 0);
7280 MODULE_PARM_DESC(wlsw_state,
7281 "Initial state of the emulated WLSW switch");
7282
7283 module_param(dbg_bluetoothemul, uint, 0);
7284 MODULE_PARM_DESC(dbg_bluetoothemul, "Enables bluetooth switch emulation");
7285 module_param_named(bluetooth_state, tpacpi_bluetooth_emulstate, bool, 0);
7286 MODULE_PARM_DESC(bluetooth_state,
7287 "Initial state of the emulated bluetooth switch");
7288
7289 module_param(dbg_wwanemul, uint, 0);
7290 MODULE_PARM_DESC(dbg_wwanemul, "Enables WWAN switch emulation");
7291 module_param_named(wwan_state, tpacpi_wwan_emulstate, bool, 0);
7292 MODULE_PARM_DESC(wwan_state,
7293 "Initial state of the emulated WWAN switch");
7294
7295 module_param(dbg_uwbemul, uint, 0);
7296 MODULE_PARM_DESC(dbg_uwbemul, "Enables UWB switch emulation");
7297 module_param_named(uwb_state, tpacpi_uwb_emulstate, bool, 0);
7298 MODULE_PARM_DESC(uwb_state,
7299 "Initial state of the emulated UWB switch");
7300 #endif
7301
7302 static void thinkpad_acpi_module_exit(void)
7303 {
7304 struct ibm_struct *ibm, *itmp;
7305
7306 tpacpi_lifecycle = TPACPI_LIFE_EXITING;
7307
7308 list_for_each_entry_safe_reverse(ibm, itmp,
7309 &tpacpi_all_drivers,
7310 all_drivers) {
7311 ibm_exit(ibm);
7312 }
7313
7314 dbg_printk(TPACPI_DBG_INIT, "finished subdriver exit path...\n");
7315
7316 if (tpacpi_inputdev) {
7317 if (tp_features.input_device_registered)
7318 input_unregister_device(tpacpi_inputdev);
7319 else
7320 input_free_device(tpacpi_inputdev);
7321 }
7322
7323 if (tpacpi_hwmon)
7324 hwmon_device_unregister(tpacpi_hwmon);
7325
7326 if (tp_features.sensors_pdev_attrs_registered)
7327 device_remove_file(&tpacpi_sensors_pdev->dev,
7328 &dev_attr_thinkpad_acpi_pdev_name);
7329 if (tpacpi_sensors_pdev)
7330 platform_device_unregister(tpacpi_sensors_pdev);
7331 if (tpacpi_pdev)
7332 platform_device_unregister(tpacpi_pdev);
7333
7334 if (tp_features.sensors_pdrv_attrs_registered)
7335 tpacpi_remove_driver_attributes(&tpacpi_hwmon_pdriver.driver);
7336 if (tp_features.platform_drv_attrs_registered)
7337 tpacpi_remove_driver_attributes(&tpacpi_pdriver.driver);
7338
7339 if (tp_features.sensors_pdrv_registered)
7340 platform_driver_unregister(&tpacpi_hwmon_pdriver);
7341
7342 if (tp_features.platform_drv_registered)
7343 platform_driver_unregister(&tpacpi_pdriver);
7344
7345 if (proc_dir)
7346 remove_proc_entry(TPACPI_PROC_DIR, acpi_root_dir);
7347
7348 if (tpacpi_wq)
7349 destroy_workqueue(tpacpi_wq);
7350
7351 kfree(thinkpad_id.bios_version_str);
7352 kfree(thinkpad_id.ec_version_str);
7353 kfree(thinkpad_id.model_str);
7354 }
7355
7356
7357 static int __init thinkpad_acpi_module_init(void)
7358 {
7359 int ret, i;
7360
7361 tpacpi_lifecycle = TPACPI_LIFE_INIT;
7362
7363 /* Parameter checking */
7364 if (hotkey_report_mode > 2)
7365 return -EINVAL;
7366
7367 /* Driver-level probe */
7368
7369 ret = get_thinkpad_model_data(&thinkpad_id);
7370 if (ret) {
7371 printk(TPACPI_ERR
7372 "unable to get DMI data: %d\n", ret);
7373 thinkpad_acpi_module_exit();
7374 return ret;
7375 }
7376 ret = probe_for_thinkpad();
7377 if (ret) {
7378 thinkpad_acpi_module_exit();
7379 return ret;
7380 }
7381
7382 /* Driver initialization */
7383
7384 TPACPI_ACPIHANDLE_INIT(ecrd);
7385 TPACPI_ACPIHANDLE_INIT(ecwr);
7386
7387 tpacpi_wq = create_singlethread_workqueue(TPACPI_WORKQUEUE_NAME);
7388 if (!tpacpi_wq) {
7389 thinkpad_acpi_module_exit();
7390 return -ENOMEM;
7391 }
7392
7393 proc_dir = proc_mkdir(TPACPI_PROC_DIR, acpi_root_dir);
7394 if (!proc_dir) {
7395 printk(TPACPI_ERR
7396 "unable to create proc dir " TPACPI_PROC_DIR);
7397 thinkpad_acpi_module_exit();
7398 return -ENODEV;
7399 }
7400 proc_dir->owner = THIS_MODULE;
7401
7402 ret = platform_driver_register(&tpacpi_pdriver);
7403 if (ret) {
7404 printk(TPACPI_ERR
7405 "unable to register main platform driver\n");
7406 thinkpad_acpi_module_exit();
7407 return ret;
7408 }
7409 tp_features.platform_drv_registered = 1;
7410
7411 ret = platform_driver_register(&tpacpi_hwmon_pdriver);
7412 if (ret) {
7413 printk(TPACPI_ERR
7414 "unable to register hwmon platform driver\n");
7415 thinkpad_acpi_module_exit();
7416 return ret;
7417 }
7418 tp_features.sensors_pdrv_registered = 1;
7419
7420 ret = tpacpi_create_driver_attributes(&tpacpi_pdriver.driver);
7421 if (!ret) {
7422 tp_features.platform_drv_attrs_registered = 1;
7423 ret = tpacpi_create_driver_attributes(
7424 &tpacpi_hwmon_pdriver.driver);
7425 }
7426 if (ret) {
7427 printk(TPACPI_ERR
7428 "unable to create sysfs driver attributes\n");
7429 thinkpad_acpi_module_exit();
7430 return ret;
7431 }
7432 tp_features.sensors_pdrv_attrs_registered = 1;
7433
7434
7435 /* Device initialization */
7436 tpacpi_pdev = platform_device_register_simple(TPACPI_DRVR_NAME, -1,
7437 NULL, 0);
7438 if (IS_ERR(tpacpi_pdev)) {
7439 ret = PTR_ERR(tpacpi_pdev);
7440 tpacpi_pdev = NULL;
7441 printk(TPACPI_ERR "unable to register platform device\n");
7442 thinkpad_acpi_module_exit();
7443 return ret;
7444 }
7445 tpacpi_sensors_pdev = platform_device_register_simple(
7446 TPACPI_HWMON_DRVR_NAME,
7447 -1, NULL, 0);
7448 if (IS_ERR(tpacpi_sensors_pdev)) {
7449 ret = PTR_ERR(tpacpi_sensors_pdev);
7450 tpacpi_sensors_pdev = NULL;
7451 printk(TPACPI_ERR
7452 "unable to register hwmon platform device\n");
7453 thinkpad_acpi_module_exit();
7454 return ret;
7455 }
7456 ret = device_create_file(&tpacpi_sensors_pdev->dev,
7457 &dev_attr_thinkpad_acpi_pdev_name);
7458 if (ret) {
7459 printk(TPACPI_ERR
7460 "unable to create sysfs hwmon device attributes\n");
7461 thinkpad_acpi_module_exit();
7462 return ret;
7463 }
7464 tp_features.sensors_pdev_attrs_registered = 1;
7465 tpacpi_hwmon = hwmon_device_register(&tpacpi_sensors_pdev->dev);
7466 if (IS_ERR(tpacpi_hwmon)) {
7467 ret = PTR_ERR(tpacpi_hwmon);
7468 tpacpi_hwmon = NULL;
7469 printk(TPACPI_ERR "unable to register hwmon device\n");
7470 thinkpad_acpi_module_exit();
7471 return ret;
7472 }
7473 mutex_init(&tpacpi_inputdev_send_mutex);
7474 tpacpi_inputdev = input_allocate_device();
7475 if (!tpacpi_inputdev) {
7476 printk(TPACPI_ERR "unable to allocate input device\n");
7477 thinkpad_acpi_module_exit();
7478 return -ENOMEM;
7479 } else {
7480 /* Prepare input device, but don't register */
7481 tpacpi_inputdev->name = "ThinkPad Extra Buttons";
7482 tpacpi_inputdev->phys = TPACPI_DRVR_NAME "/input0";
7483 tpacpi_inputdev->id.bustype = BUS_HOST;
7484 tpacpi_inputdev->id.vendor = (thinkpad_id.vendor) ?
7485 thinkpad_id.vendor :
7486 PCI_VENDOR_ID_IBM;
7487 tpacpi_inputdev->id.product = TPACPI_HKEY_INPUT_PRODUCT;
7488 tpacpi_inputdev->id.version = TPACPI_HKEY_INPUT_VERSION;
7489 }
7490 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
7491 ret = ibm_init(&ibms_init[i]);
7492 if (ret >= 0 && *ibms_init[i].param)
7493 ret = ibms_init[i].data->write(ibms_init[i].param);
7494 if (ret < 0) {
7495 thinkpad_acpi_module_exit();
7496 return ret;
7497 }
7498 }
7499 ret = input_register_device(tpacpi_inputdev);
7500 if (ret < 0) {
7501 printk(TPACPI_ERR "unable to register input device\n");
7502 thinkpad_acpi_module_exit();
7503 return ret;
7504 } else {
7505 tp_features.input_device_registered = 1;
7506 }
7507
7508 tpacpi_lifecycle = TPACPI_LIFE_RUNNING;
7509 return 0;
7510 }
7511
7512 /* Please remove this in year 2009 */
7513 MODULE_ALIAS("ibm_acpi");
7514
7515 MODULE_ALIAS(TPACPI_DRVR_SHORTNAME);
7516
7517 /*
7518 * DMI matching for module autoloading
7519 *
7520 * See http://thinkwiki.org/wiki/List_of_DMI_IDs
7521 * See http://thinkwiki.org/wiki/BIOS_Upgrade_Downloads
7522 *
7523 * Only models listed in thinkwiki will be supported, so add yours
7524 * if it is not there yet.
7525 */
7526 #define IBM_BIOS_MODULE_ALIAS(__type) \
7527 MODULE_ALIAS("dmi:bvnIBM:bvr" __type "ET??WW*")
7528
7529 /* Non-ancient thinkpads */
7530 MODULE_ALIAS("dmi:bvnIBM:*:svnIBM:*:pvrThinkPad*:rvnIBM:*");
7531 MODULE_ALIAS("dmi:bvnLENOVO:*:svnLENOVO:*:pvrThinkPad*:rvnLENOVO:*");
7532
7533 /* Ancient thinkpad BIOSes have to be identified by
7534 * BIOS type or model number, and there are far less
7535 * BIOS types than model numbers... */
7536 IBM_BIOS_MODULE_ALIAS("I[BDHIMNOTWVYZ]");
7537 IBM_BIOS_MODULE_ALIAS("1[0368A-GIKM-PST]");
7538 IBM_BIOS_MODULE_ALIAS("K[UX-Z]");
7539
7540 MODULE_AUTHOR("Borislav Deianov, Henrique de Moraes Holschuh");
7541 MODULE_DESCRIPTION(TPACPI_DESC);
7542 MODULE_VERSION(TPACPI_VERSION);
7543 MODULE_LICENSE("GPL");
7544
7545 module_init(thinkpad_acpi_module_init);
7546 module_exit(thinkpad_acpi_module_exit);
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree