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thinkpad-acpi: drop ibm-acpi alias
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / platform / x86 / thinkpad_acpi.c
blobc83ec94eb8d95774b127506586e61dde2a3a9c08
1 /*
2 * thinkpad_acpi.c - ThinkPad ACPI Extras
3 *
4 *
5 * Copyright (C) 2004-2005 Borislav Deianov <borislav@users.sf.net>
6 * Copyright (C) 2006-2009 Henrique de Moraes Holschuh <hmh@hmh.eng.br>
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
21 * 02110-1301, USA.
22 */
23
24 #define TPACPI_VERSION "0.22"
25 #define TPACPI_SYSFS_VERSION 0x020200
26
27 /*
28 * Changelog:
29 * 2007-10-20 changelog trimmed down
30 *
31 * 2007-03-27 0.14 renamed to thinkpad_acpi and moved to
32 * drivers/misc.
33 *
34 * 2006-11-22 0.13 new maintainer
35 * changelog now lives in git commit history, and will
36 * not be updated further in-file.
37 *
38 * 2005-03-17 0.11 support for 600e, 770x
39 * thanks to Jamie Lentin <lentinj@dial.pipex.com>
40 *
41 * 2005-01-16 0.9 use MODULE_VERSION
42 * thanks to Henrik Brix Andersen <brix@gentoo.org>
43 * fix parameter passing on module loading
44 * thanks to Rusty Russell <rusty@rustcorp.com.au>
45 * thanks to Jim Radford <radford@blackbean.org>
46 * 2004-11-08 0.8 fix init error case, don't return from a macro
47 * thanks to Chris Wright <chrisw@osdl.org>
48 */
49
50 #include <linux/kernel.h>
51 #include <linux/module.h>
52 #include <linux/init.h>
53 #include <linux/types.h>
54 #include <linux/string.h>
55 #include <linux/list.h>
56 #include <linux/mutex.h>
57 #include <linux/kthread.h>
58 #include <linux/freezer.h>
59 #include <linux/delay.h>
60
61 #include <linux/nvram.h>
62 #include <linux/proc_fs.h>
63 #include <linux/sysfs.h>
64 #include <linux/backlight.h>
65 #include <linux/fb.h>
66 #include <linux/platform_device.h>
67 #include <linux/hwmon.h>
68 #include <linux/hwmon-sysfs.h>
69 #include <linux/input.h>
70 #include <linux/leds.h>
71 #include <linux/rfkill.h>
72 #include <asm/uaccess.h>
73
74 #include <linux/dmi.h>
75 #include <linux/jiffies.h>
76 #include <linux/workqueue.h>
77
78 #include <acpi/acpi_drivers.h>
79
80 #include <linux/pci_ids.h>
81
82
83 /* ThinkPad CMOS commands */
84 #define TP_CMOS_VOLUME_DOWN 0
85 #define TP_CMOS_VOLUME_UP 1
86 #define TP_CMOS_VOLUME_MUTE 2
87 #define TP_CMOS_BRIGHTNESS_UP 4
88 #define TP_CMOS_BRIGHTNESS_DOWN 5
89 #define TP_CMOS_THINKLIGHT_ON 12
90 #define TP_CMOS_THINKLIGHT_OFF 13
91
92 /* NVRAM Addresses */
93 enum tp_nvram_addr {
94 TP_NVRAM_ADDR_HK2 = 0x57,
95 TP_NVRAM_ADDR_THINKLIGHT = 0x58,
96 TP_NVRAM_ADDR_VIDEO = 0x59,
97 TP_NVRAM_ADDR_BRIGHTNESS = 0x5e,
98 TP_NVRAM_ADDR_MIXER = 0x60,
99 };
100
101 /* NVRAM bit masks */
102 enum {
103 TP_NVRAM_MASK_HKT_THINKPAD = 0x08,
104 TP_NVRAM_MASK_HKT_ZOOM = 0x20,
105 TP_NVRAM_MASK_HKT_DISPLAY = 0x40,
106 TP_NVRAM_MASK_HKT_HIBERNATE = 0x80,
107 TP_NVRAM_MASK_THINKLIGHT = 0x10,
108 TP_NVRAM_MASK_HKT_DISPEXPND = 0x30,
109 TP_NVRAM_MASK_HKT_BRIGHTNESS = 0x20,
110 TP_NVRAM_MASK_LEVEL_BRIGHTNESS = 0x0f,
111 TP_NVRAM_POS_LEVEL_BRIGHTNESS = 0,
112 TP_NVRAM_MASK_MUTE = 0x40,
113 TP_NVRAM_MASK_HKT_VOLUME = 0x80,
114 TP_NVRAM_MASK_LEVEL_VOLUME = 0x0f,
115 TP_NVRAM_POS_LEVEL_VOLUME = 0,
116 };
117
118 /* ACPI HIDs */
119 #define TPACPI_ACPI_HKEY_HID "IBM0068"
120
121 /* Input IDs */
122 #define TPACPI_HKEY_INPUT_PRODUCT 0x5054 /* "TP" */
123 #define TPACPI_HKEY_INPUT_VERSION 0x4101
124
125 /* ACPI \WGSV commands */
126 enum {
127 TP_ACPI_WGSV_GET_STATE = 0x01, /* Get state information */
128 TP_ACPI_WGSV_PWR_ON_ON_RESUME = 0x02, /* Resume WWAN powered on */
129 TP_ACPI_WGSV_PWR_OFF_ON_RESUME = 0x03, /* Resume WWAN powered off */
130 TP_ACPI_WGSV_SAVE_STATE = 0x04, /* Save state for S4/S5 */
131 };
132
133 /* TP_ACPI_WGSV_GET_STATE bits */
134 enum {
135 TP_ACPI_WGSV_STATE_WWANEXIST = 0x0001, /* WWAN hw available */
136 TP_ACPI_WGSV_STATE_WWANPWR = 0x0002, /* WWAN radio enabled */
137 TP_ACPI_WGSV_STATE_WWANPWRRES = 0x0004, /* WWAN state at resume */
138 TP_ACPI_WGSV_STATE_WWANBIOSOFF = 0x0008, /* WWAN disabled in BIOS */
139 TP_ACPI_WGSV_STATE_BLTHEXIST = 0x0001, /* BLTH hw available */
140 TP_ACPI_WGSV_STATE_BLTHPWR = 0x0002, /* BLTH radio enabled */
141 TP_ACPI_WGSV_STATE_BLTHPWRRES = 0x0004, /* BLTH state at resume */
142 TP_ACPI_WGSV_STATE_BLTHBIOSOFF = 0x0008, /* BLTH disabled in BIOS */
143 TP_ACPI_WGSV_STATE_UWBEXIST = 0x0010, /* UWB hw available */
144 TP_ACPI_WGSV_STATE_UWBPWR = 0x0020, /* UWB radio enabled */
145 };
146
147 /****************************************************************************
148 * Main driver
149 */
150
151 #define TPACPI_NAME "thinkpad"
152 #define TPACPI_DESC "ThinkPad ACPI Extras"
153 #define TPACPI_FILE TPACPI_NAME "_acpi"
154 #define TPACPI_URL "http://ibm-acpi.sf.net/"
155 #define TPACPI_MAIL "ibm-acpi-devel@lists.sourceforge.net"
156
157 #define TPACPI_PROC_DIR "ibm"
158 #define TPACPI_ACPI_EVENT_PREFIX "ibm"
159 #define TPACPI_DRVR_NAME TPACPI_FILE
160 #define TPACPI_DRVR_SHORTNAME "tpacpi"
161 #define TPACPI_HWMON_DRVR_NAME TPACPI_NAME "_hwmon"
162
163 #define TPACPI_NVRAM_KTHREAD_NAME "ktpacpi_nvramd"
164 #define TPACPI_WORKQUEUE_NAME "ktpacpid"
165
166 #define TPACPI_MAX_ACPI_ARGS 3
167
168 /* rfkill switches */
169 enum {
170 TPACPI_RFK_BLUETOOTH_SW_ID = 0,
171 TPACPI_RFK_WWAN_SW_ID,
172 TPACPI_RFK_UWB_SW_ID,
173 };
174
175 /* Debugging */
176 #define TPACPI_LOG TPACPI_FILE ": "
177 #define TPACPI_ALERT KERN_ALERT TPACPI_LOG
178 #define TPACPI_CRIT KERN_CRIT TPACPI_LOG
179 #define TPACPI_ERR KERN_ERR TPACPI_LOG
180 #define TPACPI_NOTICE KERN_NOTICE TPACPI_LOG
181 #define TPACPI_INFO KERN_INFO TPACPI_LOG
182 #define TPACPI_DEBUG KERN_DEBUG TPACPI_LOG
183
184 #define TPACPI_DBG_ALL 0xffff
185 #define TPACPI_DBG_INIT 0x0001
186 #define TPACPI_DBG_EXIT 0x0002
187 #define dbg_printk(a_dbg_level, format, arg...) \
188 do { if (dbg_level & a_dbg_level) \
189 printk(TPACPI_DEBUG "%s: " format, __func__ , ## arg); \
190 } while (0)
191 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
192 #define vdbg_printk(a_dbg_level, format, arg...) \
193 dbg_printk(a_dbg_level, format, ## arg)
194 static const char *str_supported(int is_supported);
195 #else
196 #define vdbg_printk(a_dbg_level, format, arg...)
197 #endif
198
199 #define onoff(status, bit) ((status) & (1 << (bit)) ? "on" : "off")
200 #define enabled(status, bit) ((status) & (1 << (bit)) ? "enabled" : "disabled")
201 #define strlencmp(a, b) (strncmp((a), (b), strlen(b)))
202
203
204 /****************************************************************************
205 * Driver-wide structs and misc. variables
206 */
207
208 struct ibm_struct;
209
210 struct tp_acpi_drv_struct {
211 const struct acpi_device_id *hid;
212 struct acpi_driver *driver;
213
214 void (*notify) (struct ibm_struct *, u32);
215 acpi_handle *handle;
216 u32 type;
217 struct acpi_device *device;
218 };
219
220 struct ibm_struct {
221 char *name;
222
223 int (*read) (char *);
224 int (*write) (char *);
225 void (*exit) (void);
226 void (*resume) (void);
227 void (*suspend) (pm_message_t state);
228 void (*shutdown) (void);
229
230 struct list_head all_drivers;
231
232 struct tp_acpi_drv_struct *acpi;
233
234 struct {
235 u8 acpi_driver_registered:1;
236 u8 acpi_notify_installed:1;
237 u8 proc_created:1;
238 u8 init_called:1;
239 u8 experimental:1;
240 } flags;
241 };
242
243 struct ibm_init_struct {
244 char param[32];
245
246 int (*init) (struct ibm_init_struct *);
247 struct ibm_struct *data;
248 };
249
250 static struct {
251 #ifdef CONFIG_THINKPAD_ACPI_BAY
252 u32 bay_status:1;
253 u32 bay_eject:1;
254 u32 bay_status2:1;
255 u32 bay_eject2:1;
256 #endif
257 u32 bluetooth:1;
258 u32 hotkey:1;
259 u32 hotkey_mask:1;
260 u32 hotkey_wlsw:1;
261 u32 hotkey_tablet:1;
262 u32 light:1;
263 u32 light_status:1;
264 u32 bright_16levels:1;
265 u32 bright_acpimode:1;
266 u32 wan:1;
267 u32 uwb:1;
268 u32 fan_ctrl_status_undef:1;
269 u32 input_device_registered:1;
270 u32 platform_drv_registered:1;
271 u32 platform_drv_attrs_registered:1;
272 u32 sensors_pdrv_registered:1;
273 u32 sensors_pdrv_attrs_registered:1;
274 u32 sensors_pdev_attrs_registered:1;
275 u32 hotkey_poll_active:1;
276 } tp_features;
277
278 static struct {
279 u16 hotkey_mask_ff:1;
280 u16 bright_cmos_ec_unsync:1;
281 } tp_warned;
282
283 struct thinkpad_id_data {
284 unsigned int vendor; /* ThinkPad vendor:
285 * PCI_VENDOR_ID_IBM/PCI_VENDOR_ID_LENOVO */
286
287 char *bios_version_str; /* Something like 1ZET51WW (1.03z) */
288 char *ec_version_str; /* Something like 1ZHT51WW-1.04a */
289
290 u16 bios_model; /* Big Endian, TP-1Y = 0x5931, 0 = unknown */
291 u16 ec_model;
292
293 char *model_str; /* ThinkPad T43 */
294 char *nummodel_str; /* 9384A9C for a 9384-A9C model */
295 };
296 static struct thinkpad_id_data thinkpad_id;
297
298 static enum {
299 TPACPI_LIFE_INIT = 0,
300 TPACPI_LIFE_RUNNING,
301 TPACPI_LIFE_EXITING,
302 } tpacpi_lifecycle;
303
304 static int experimental;
305 static u32 dbg_level;
306
307 static struct workqueue_struct *tpacpi_wq;
308
309 /* Special LED class that can defer work */
310 struct tpacpi_led_classdev {
311 struct led_classdev led_classdev;
312 struct work_struct work;
313 enum led_brightness new_brightness;
314 unsigned int led;
315 };
316
317 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
318 static int dbg_wlswemul;
319 static int tpacpi_wlsw_emulstate;
320 static int dbg_bluetoothemul;
321 static int tpacpi_bluetooth_emulstate;
322 static int dbg_wwanemul;
323 static int tpacpi_wwan_emulstate;
324 static int dbg_uwbemul;
325 static int tpacpi_uwb_emulstate;
326 #endif
327
328
329 /****************************************************************************
330 ****************************************************************************
331 *
332 * ACPI Helpers and device model
333 *
334 ****************************************************************************
335 ****************************************************************************/
336
337 /*************************************************************************
338 * ACPI basic handles
339 */
340
341 static acpi_handle root_handle;
342
343 #define TPACPI_HANDLE(object, parent, paths...) \
344 static acpi_handle object##_handle; \
345 static acpi_handle *object##_parent = &parent##_handle; \
346 static char *object##_path; \
347 static char *object##_paths[] = { paths }
348
349 TPACPI_HANDLE(ec, root, "\\_SB.PCI0.ISA.EC0", /* 240, 240x */
350 "\\_SB.PCI.ISA.EC", /* 570 */
351 "\\_SB.PCI0.ISA0.EC0", /* 600e/x, 770e, 770x */
352 "\\_SB.PCI0.ISA.EC", /* A21e, A2xm/p, T20-22, X20-21 */
353 "\\_SB.PCI0.AD4S.EC0", /* i1400, R30 */
354 "\\_SB.PCI0.ICH3.EC0", /* R31 */
355 "\\_SB.PCI0.LPC.EC", /* all others */
356 );
357
358 TPACPI_HANDLE(ecrd, ec, "ECRD"); /* 570 */
359 TPACPI_HANDLE(ecwr, ec, "ECWR"); /* 570 */
360
361 TPACPI_HANDLE(cmos, root, "\\UCMS", /* R50, R50e, R50p, R51, */
362 /* T4x, X31, X40 */
363 "\\CMOS", /* A3x, G4x, R32, T23, T30, X22-24, X30 */
364 "\\CMS", /* R40, R40e */
365 ); /* all others */
366
367 TPACPI_HANDLE(hkey, ec, "\\_SB.HKEY", /* 600e/x, 770e, 770x */
368 "^HKEY", /* R30, R31 */
369 "HKEY", /* all others */
370 ); /* 570 */
371
372 TPACPI_HANDLE(vid, root, "\\_SB.PCI.AGP.VGA", /* 570 */
373 "\\_SB.PCI0.AGP0.VID0", /* 600e/x, 770x */
374 "\\_SB.PCI0.VID0", /* 770e */
375 "\\_SB.PCI0.VID", /* A21e, G4x, R50e, X30, X40 */
376 "\\_SB.PCI0.AGP.VID", /* all others */
377 ); /* R30, R31 */
378
379
380 /*************************************************************************
381 * ACPI helpers
382 */
383
384 static int acpi_evalf(acpi_handle handle,
385 void *res, char *method, char *fmt, ...)
386 {
387 char *fmt0 = fmt;
388 struct acpi_object_list params;
389 union acpi_object in_objs[TPACPI_MAX_ACPI_ARGS];
390 struct acpi_buffer result, *resultp;
391 union acpi_object out_obj;
392 acpi_status status;
393 va_list ap;
394 char res_type;
395 int success;
396 int quiet;
397
398 if (!*fmt) {
399 printk(TPACPI_ERR "acpi_evalf() called with empty format\n");
400 return 0;
401 }
402
403 if (*fmt == 'q') {
404 quiet = 1;
405 fmt++;
406 } else
407 quiet = 0;
408
409 res_type = *(fmt++);
410
411 params.count = 0;
412 params.pointer = &in_objs[0];
413
414 va_start(ap, fmt);
415 while (*fmt) {
416 char c = *(fmt++);
417 switch (c) {
418 case 'd': /* int */
419 in_objs[params.count].integer.value = va_arg(ap, int);
420 in_objs[params.count++].type = ACPI_TYPE_INTEGER;
421 break;
422 /* add more types as needed */
423 default:
424 printk(TPACPI_ERR "acpi_evalf() called "
425 "with invalid format character '%c'\n", c);
426 return 0;
427 }
428 }
429 va_end(ap);
430
431 if (res_type != 'v') {
432 result.length = sizeof(out_obj);
433 result.pointer = &out_obj;
434 resultp = &result;
435 } else
436 resultp = NULL;
437
438 status = acpi_evaluate_object(handle, method, &params, resultp);
439
440 switch (res_type) {
441 case 'd': /* int */
442 if (res)
443 *(int *)res = out_obj.integer.value;
444 success = status == AE_OK && out_obj.type == ACPI_TYPE_INTEGER;
445 break;
446 case 'v': /* void */
447 success = status == AE_OK;
448 break;
449 /* add more types as needed */
450 default:
451 printk(TPACPI_ERR "acpi_evalf() called "
452 "with invalid format character '%c'\n", res_type);
453 return 0;
454 }
455
456 if (!success && !quiet)
457 printk(TPACPI_ERR "acpi_evalf(%s, %s, ...) failed: %d\n",
458 method, fmt0, status);
459
460 return success;
461 }
462
463 static int acpi_ec_read(int i, u8 *p)
464 {
465 int v;
466
467 if (ecrd_handle) {
468 if (!acpi_evalf(ecrd_handle, &v, NULL, "dd", i))
469 return 0;
470 *p = v;
471 } else {
472 if (ec_read(i, p) < 0)
473 return 0;
474 }
475
476 return 1;
477 }
478
479 static int acpi_ec_write(int i, u8 v)
480 {
481 if (ecwr_handle) {
482 if (!acpi_evalf(ecwr_handle, NULL, NULL, "vdd", i, v))
483 return 0;
484 } else {
485 if (ec_write(i, v) < 0)
486 return 0;
487 }
488
489 return 1;
490 }
491
492 #if defined(CONFIG_THINKPAD_ACPI_DOCK) || defined(CONFIG_THINKPAD_ACPI_BAY)
493 static int _sta(acpi_handle handle)
494 {
495 int status;
496
497 if (!handle || !acpi_evalf(handle, &status, "_STA", "d"))
498 status = 0;
499
500 return status;
501 }
502 #endif
503
504 static int issue_thinkpad_cmos_command(int cmos_cmd)
505 {
506 if (!cmos_handle)
507 return -ENXIO;
508
509 if (!acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd))
510 return -EIO;
511
512 return 0;
513 }
514
515 /*************************************************************************
516 * ACPI device model
517 */
518
519 #define TPACPI_ACPIHANDLE_INIT(object) \
520 drv_acpi_handle_init(#object, &object##_handle, *object##_parent, \
521 object##_paths, ARRAY_SIZE(object##_paths), &object##_path)
522
523 static void drv_acpi_handle_init(char *name,
524 acpi_handle *handle, acpi_handle parent,
525 char **paths, int num_paths, char **path)
526 {
527 int i;
528 acpi_status status;
529
530 vdbg_printk(TPACPI_DBG_INIT, "trying to locate ACPI handle for %s\n",
531 name);
532
533 for (i = 0; i < num_paths; i++) {
534 status = acpi_get_handle(parent, paths[i], handle);
535 if (ACPI_SUCCESS(status)) {
536 *path = paths[i];
537 dbg_printk(TPACPI_DBG_INIT,
538 "Found ACPI handle %s for %s\n",
539 *path, name);
540 return;
541 }
542 }
543
544 vdbg_printk(TPACPI_DBG_INIT, "ACPI handle for %s not found\n",
545 name);
546 *handle = NULL;
547 }
548
549 static void dispatch_acpi_notify(acpi_handle handle, u32 event, void *data)
550 {
551 struct ibm_struct *ibm = data;
552
553 if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
554 return;
555
556 if (!ibm || !ibm->acpi || !ibm->acpi->notify)
557 return;
558
559 ibm->acpi->notify(ibm, event);
560 }
561
562 static int __init setup_acpi_notify(struct ibm_struct *ibm)
563 {
564 acpi_status status;
565 int rc;
566
567 BUG_ON(!ibm->acpi);
568
569 if (!*ibm->acpi->handle)
570 return 0;
571
572 vdbg_printk(TPACPI_DBG_INIT,
573 "setting up ACPI notify for %s\n", ibm->name);
574
575 rc = acpi_bus_get_device(*ibm->acpi->handle, &ibm->acpi->device);
576 if (rc < 0) {
577 printk(TPACPI_ERR "acpi_bus_get_device(%s) failed: %d\n",
578 ibm->name, rc);
579 return -ENODEV;
580 }
581
582 ibm->acpi->device->driver_data = ibm;
583 sprintf(acpi_device_class(ibm->acpi->device), "%s/%s",
584 TPACPI_ACPI_EVENT_PREFIX,
585 ibm->name);
586
587 status = acpi_install_notify_handler(*ibm->acpi->handle,
588 ibm->acpi->type, dispatch_acpi_notify, ibm);
589 if (ACPI_FAILURE(status)) {
590 if (status == AE_ALREADY_EXISTS) {
591 printk(TPACPI_NOTICE
592 "another device driver is already "
593 "handling %s events\n", ibm->name);
594 } else {
595 printk(TPACPI_ERR
596 "acpi_install_notify_handler(%s) failed: %d\n",
597 ibm->name, status);
598 }
599 return -ENODEV;
600 }
601 ibm->flags.acpi_notify_installed = 1;
602 return 0;
603 }
604
605 static int __init tpacpi_device_add(struct acpi_device *device)
606 {
607 return 0;
608 }
609
610 static int __init register_tpacpi_subdriver(struct ibm_struct *ibm)
611 {
612 int rc;
613
614 dbg_printk(TPACPI_DBG_INIT,
615 "registering %s as an ACPI driver\n", ibm->name);
616
617 BUG_ON(!ibm->acpi);
618
619 ibm->acpi->driver = kzalloc(sizeof(struct acpi_driver), GFP_KERNEL);
620 if (!ibm->acpi->driver) {
621 printk(TPACPI_ERR
622 "failed to allocate memory for ibm->acpi->driver\n");
623 return -ENOMEM;
624 }
625
626 sprintf(ibm->acpi->driver->name, "%s_%s", TPACPI_NAME, ibm->name);
627 ibm->acpi->driver->ids = ibm->acpi->hid;
628
629 ibm->acpi->driver->ops.add = &tpacpi_device_add;
630
631 rc = acpi_bus_register_driver(ibm->acpi->driver);
632 if (rc < 0) {
633 printk(TPACPI_ERR "acpi_bus_register_driver(%s) failed: %d\n",
634 ibm->name, rc);
635 kfree(ibm->acpi->driver);
636 ibm->acpi->driver = NULL;
637 } else if (!rc)
638 ibm->flags.acpi_driver_registered = 1;
639
640 return rc;
641 }
642
643
644 /****************************************************************************
645 ****************************************************************************
646 *
647 * Procfs Helpers
648 *
649 ****************************************************************************
650 ****************************************************************************/
651
652 static int dispatch_procfs_read(char *page, char **start, off_t off,
653 int count, int *eof, void *data)
654 {
655 struct ibm_struct *ibm = data;
656 int len;
657
658 if (!ibm || !ibm->read)
659 return -EINVAL;
660
661 len = ibm->read(page);
662 if (len < 0)
663 return len;
664
665 if (len <= off + count)
666 *eof = 1;
667 *start = page + off;
668 len -= off;
669 if (len > count)
670 len = count;
671 if (len < 0)
672 len = 0;
673
674 return len;
675 }
676
677 static int dispatch_procfs_write(struct file *file,
678 const char __user *userbuf,
679 unsigned long count, void *data)
680 {
681 struct ibm_struct *ibm = data;
682 char *kernbuf;
683 int ret;
684
685 if (!ibm || !ibm->write)
686 return -EINVAL;
687
688 kernbuf = kmalloc(count + 2, GFP_KERNEL);
689 if (!kernbuf)
690 return -ENOMEM;
691
692 if (copy_from_user(kernbuf, userbuf, count)) {
693 kfree(kernbuf);
694 return -EFAULT;
695 }
696
697 kernbuf[count] = 0;
698 strcat(kernbuf, ",");
699 ret = ibm->write(kernbuf);
700 if (ret == 0)
701 ret = count;
702
703 kfree(kernbuf);
704
705 return ret;
706 }
707
708 static char *next_cmd(char **cmds)
709 {
710 char *start = *cmds;
711 char *end;
712
713 while ((end = strchr(start, ',')) && end == start)
714 start = end + 1;
715
716 if (!end)
717 return NULL;
718
719 *end = 0;
720 *cmds = end + 1;
721 return start;
722 }
723
724
725 /****************************************************************************
726 ****************************************************************************
727 *
728 * Device model: input, hwmon and platform
729 *
730 ****************************************************************************
731 ****************************************************************************/
732
733 static struct platform_device *tpacpi_pdev;
734 static struct platform_device *tpacpi_sensors_pdev;
735 static struct device *tpacpi_hwmon;
736 static struct input_dev *tpacpi_inputdev;
737 static struct mutex tpacpi_inputdev_send_mutex;
738 static LIST_HEAD(tpacpi_all_drivers);
739
740 static int tpacpi_suspend_handler(struct platform_device *pdev,
741 pm_message_t state)
742 {
743 struct ibm_struct *ibm, *itmp;
744
745 list_for_each_entry_safe(ibm, itmp,
746 &tpacpi_all_drivers,
747 all_drivers) {
748 if (ibm->suspend)
749 (ibm->suspend)(state);
750 }
751
752 return 0;
753 }
754
755 static int tpacpi_resume_handler(struct platform_device *pdev)
756 {
757 struct ibm_struct *ibm, *itmp;
758
759 list_for_each_entry_safe(ibm, itmp,
760 &tpacpi_all_drivers,
761 all_drivers) {
762 if (ibm->resume)
763 (ibm->resume)();
764 }
765
766 return 0;
767 }
768
769 static void tpacpi_shutdown_handler(struct platform_device *pdev)
770 {
771 struct ibm_struct *ibm, *itmp;
772
773 list_for_each_entry_safe(ibm, itmp,
774 &tpacpi_all_drivers,
775 all_drivers) {
776 if (ibm->shutdown)
777 (ibm->shutdown)();
778 }
779 }
780
781 static struct platform_driver tpacpi_pdriver = {
782 .driver = {
783 .name = TPACPI_DRVR_NAME,
784 .owner = THIS_MODULE,
785 },
786 .suspend = tpacpi_suspend_handler,
787 .resume = tpacpi_resume_handler,
788 .shutdown = tpacpi_shutdown_handler,
789 };
790
791 static struct platform_driver tpacpi_hwmon_pdriver = {
792 .driver = {
793 .name = TPACPI_HWMON_DRVR_NAME,
794 .owner = THIS_MODULE,
795 },
796 };
797
798 /*************************************************************************
799 * sysfs support helpers
800 */
801
802 struct attribute_set {
803 unsigned int members, max_members;
804 struct attribute_group group;
805 };
806
807 struct attribute_set_obj {
808 struct attribute_set s;
809 struct attribute *a;
810 } __attribute__((packed));
811
812 static struct attribute_set *create_attr_set(unsigned int max_members,
813 const char *name)
814 {
815 struct attribute_set_obj *sobj;
816
817 if (max_members == 0)
818 return NULL;
819
820 /* Allocates space for implicit NULL at the end too */
821 sobj = kzalloc(sizeof(struct attribute_set_obj) +
822 max_members * sizeof(struct attribute *),
823 GFP_KERNEL);
824 if (!sobj)
825 return NULL;
826 sobj->s.max_members = max_members;
827 sobj->s.group.attrs = &sobj->a;
828 sobj->s.group.name = name;
829
830 return &sobj->s;
831 }
832
833 #define destroy_attr_set(_set) \
834 kfree(_set);
835
836 /* not multi-threaded safe, use it in a single thread per set */
837 static int add_to_attr_set(struct attribute_set *s, struct attribute *attr)
838 {
839 if (!s || !attr)
840 return -EINVAL;
841
842 if (s->members >= s->max_members)
843 return -ENOMEM;
844
845 s->group.attrs[s->members] = attr;
846 s->members++;
847
848 return 0;
849 }
850
851 static int add_many_to_attr_set(struct attribute_set *s,
852 struct attribute **attr,
853 unsigned int count)
854 {
855 int i, res;
856
857 for (i = 0; i < count; i++) {
858 res = add_to_attr_set(s, attr[i]);
859 if (res)
860 return res;
861 }
862
863 return 0;
864 }
865
866 static void delete_attr_set(struct attribute_set *s, struct kobject *kobj)
867 {
868 sysfs_remove_group(kobj, &s->group);
869 destroy_attr_set(s);
870 }
871
872 #define register_attr_set_with_sysfs(_attr_set, _kobj) \
873 sysfs_create_group(_kobj, &_attr_set->group)
874
875 static int parse_strtoul(const char *buf,
876 unsigned long max, unsigned long *value)
877 {
878 char *endp;
879
880 while (*buf && isspace(*buf))
881 buf++;
882 *value = simple_strtoul(buf, &endp, 0);
883 while (*endp && isspace(*endp))
884 endp++;
885 if (*endp || *value > max)
886 return -EINVAL;
887
888 return 0;
889 }
890
891 static void tpacpi_disable_brightness_delay(void)
892 {
893 if (acpi_evalf(hkey_handle, NULL, "PWMS", "qvd", 0))
894 printk(TPACPI_NOTICE
895 "ACPI backlight control delay disabled\n");
896 }
897
898 static int __init tpacpi_query_bcl_levels(acpi_handle handle)
899 {
900 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
901 union acpi_object *obj;
902 int rc;
903
904 if (ACPI_SUCCESS(acpi_evaluate_object(handle, NULL, NULL, &buffer))) {
905 obj = (union acpi_object *)buffer.pointer;
906 if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) {
907 printk(TPACPI_ERR "Unknown _BCL data, "
908 "please report this to %s\n", TPACPI_MAIL);
909 rc = 0;
910 } else {
911 rc = obj->package.count;
912 }
913 } else {
914 return 0;
915 }
916
917 kfree(buffer.pointer);
918 return rc;
919 }
920
921 static acpi_status __init tpacpi_acpi_walk_find_bcl(acpi_handle handle,
922 u32 lvl, void *context, void **rv)
923 {
924 char name[ACPI_PATH_SEGMENT_LENGTH];
925 struct acpi_buffer buffer = { sizeof(name), &name };
926
927 if (ACPI_SUCCESS(acpi_get_name(handle, ACPI_SINGLE_NAME, &buffer)) &&
928 !strncmp("_BCL", name, sizeof(name) - 1)) {
929 BUG_ON(!rv || !*rv);
930 **(int **)rv = tpacpi_query_bcl_levels(handle);
931 return AE_CTRL_TERMINATE;
932 } else {
933 return AE_OK;
934 }
935 }
936
937 /*
938 * Returns 0 (no ACPI _BCL or _BCL invalid), or size of brightness map
939 */
940 static int __init tpacpi_check_std_acpi_brightness_support(void)
941 {
942 int status;
943 int bcl_levels = 0;
944 void *bcl_ptr = &bcl_levels;
945
946 if (!vid_handle) {
947 TPACPI_ACPIHANDLE_INIT(vid);
948 }
949 if (!vid_handle)
950 return 0;
951
952 /*
953 * Search for a _BCL method, and execute it. This is safe on all
954 * ThinkPads, and as a side-effect, _BCL will place a Lenovo Vista
955 * BIOS in ACPI backlight control mode. We do NOT have to care
956 * about calling the _BCL method in an enabled video device, any
957 * will do for our purposes.
958 */
959
960 status = acpi_walk_namespace(ACPI_TYPE_METHOD, vid_handle, 3,
961 tpacpi_acpi_walk_find_bcl, NULL,
962 &bcl_ptr);
963
964 if (ACPI_SUCCESS(status) && bcl_levels > 2) {
965 tp_features.bright_acpimode = 1;
966 return (bcl_levels - 2);
967 }
968
969 return 0;
970 }
971
972 static int __init tpacpi_new_rfkill(const unsigned int id,
973 struct rfkill **rfk,
974 const enum rfkill_type rfktype,
975 const char *name,
976 const bool set_default,
977 int (*toggle_radio)(void *, enum rfkill_state),
978 int (*get_state)(void *, enum rfkill_state *))
979 {
980 int res;
981 enum rfkill_state initial_state = RFKILL_STATE_SOFT_BLOCKED;
982
983 res = get_state(NULL, &initial_state);
984 if (res < 0) {
985 printk(TPACPI_ERR
986 "failed to read initial state for %s, error %d; "
987 "will turn radio off\n", name, res);
988 } else if (set_default) {
989 /* try to set the initial state as the default for the rfkill
990 * type, since we ask the firmware to preserve it across S5 in
991 * NVRAM */
992 rfkill_set_default(rfktype,
993 (initial_state == RFKILL_STATE_UNBLOCKED) ?
994 RFKILL_STATE_UNBLOCKED :
995 RFKILL_STATE_SOFT_BLOCKED);
996 }
997
998 *rfk = rfkill_allocate(&tpacpi_pdev->dev, rfktype);
999 if (!*rfk) {
1000 printk(TPACPI_ERR
1001 "failed to allocate memory for rfkill class\n");
1002 return -ENOMEM;
1003 }
1004
1005 (*rfk)->name = name;
1006 (*rfk)->get_state = get_state;
1007 (*rfk)->toggle_radio = toggle_radio;
1008 (*rfk)->state = initial_state;
1009
1010 res = rfkill_register(*rfk);
1011 if (res < 0) {
1012 printk(TPACPI_ERR
1013 "failed to register %s rfkill switch: %d\n",
1014 name, res);
1015 rfkill_free(*rfk);
1016 *rfk = NULL;
1017 return res;
1018 }
1019
1020 return 0;
1021 }
1022
1023 /*************************************************************************
1024 * thinkpad-acpi driver attributes
1025 */
1026
1027 /* interface_version --------------------------------------------------- */
1028 static ssize_t tpacpi_driver_interface_version_show(
1029 struct device_driver *drv,
1030 char *buf)
1031 {
1032 return snprintf(buf, PAGE_SIZE, "0x%08x\n", TPACPI_SYSFS_VERSION);
1033 }
1034
1035 static DRIVER_ATTR(interface_version, S_IRUGO,
1036 tpacpi_driver_interface_version_show, NULL);
1037
1038 /* debug_level --------------------------------------------------------- */
1039 static ssize_t tpacpi_driver_debug_show(struct device_driver *drv,
1040 char *buf)
1041 {
1042 return snprintf(buf, PAGE_SIZE, "0x%04x\n", dbg_level);
1043 }
1044
1045 static ssize_t tpacpi_driver_debug_store(struct device_driver *drv,
1046 const char *buf, size_t count)
1047 {
1048 unsigned long t;
1049
1050 if (parse_strtoul(buf, 0xffff, &t))
1051 return -EINVAL;
1052
1053 dbg_level = t;
1054
1055 return count;
1056 }
1057
1058 static DRIVER_ATTR(debug_level, S_IWUSR | S_IRUGO,
1059 tpacpi_driver_debug_show, tpacpi_driver_debug_store);
1060
1061 /* version ------------------------------------------------------------- */
1062 static ssize_t tpacpi_driver_version_show(struct device_driver *drv,
1063 char *buf)
1064 {
1065 return snprintf(buf, PAGE_SIZE, "%s v%s\n",
1066 TPACPI_DESC, TPACPI_VERSION);
1067 }
1068
1069 static DRIVER_ATTR(version, S_IRUGO,
1070 tpacpi_driver_version_show, NULL);
1071
1072 /* --------------------------------------------------------------------- */
1073
1074 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
1075
1076 static void tpacpi_send_radiosw_update(void);
1077
1078 /* wlsw_emulstate ------------------------------------------------------ */
1079 static ssize_t tpacpi_driver_wlsw_emulstate_show(struct device_driver *drv,
1080 char *buf)
1081 {
1082 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_wlsw_emulstate);
1083 }
1084
1085 static ssize_t tpacpi_driver_wlsw_emulstate_store(struct device_driver *drv,
1086 const char *buf, size_t count)
1087 {
1088 unsigned long t;
1089
1090 if (parse_strtoul(buf, 1, &t))
1091 return -EINVAL;
1092
1093 if (tpacpi_wlsw_emulstate != t) {
1094 tpacpi_wlsw_emulstate = !!t;
1095 tpacpi_send_radiosw_update();
1096 } else
1097 tpacpi_wlsw_emulstate = !!t;
1098
1099 return count;
1100 }
1101
1102 static DRIVER_ATTR(wlsw_emulstate, S_IWUSR | S_IRUGO,
1103 tpacpi_driver_wlsw_emulstate_show,
1104 tpacpi_driver_wlsw_emulstate_store);
1105
1106 /* bluetooth_emulstate ------------------------------------------------- */
1107 static ssize_t tpacpi_driver_bluetooth_emulstate_show(
1108 struct device_driver *drv,
1109 char *buf)
1110 {
1111 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_bluetooth_emulstate);
1112 }
1113
1114 static ssize_t tpacpi_driver_bluetooth_emulstate_store(
1115 struct device_driver *drv,
1116 const char *buf, size_t count)
1117 {
1118 unsigned long t;
1119
1120 if (parse_strtoul(buf, 1, &t))
1121 return -EINVAL;
1122
1123 tpacpi_bluetooth_emulstate = !!t;
1124
1125 return count;
1126 }
1127
1128 static DRIVER_ATTR(bluetooth_emulstate, S_IWUSR | S_IRUGO,
1129 tpacpi_driver_bluetooth_emulstate_show,
1130 tpacpi_driver_bluetooth_emulstate_store);
1131
1132 /* wwan_emulstate ------------------------------------------------- */
1133 static ssize_t tpacpi_driver_wwan_emulstate_show(
1134 struct device_driver *drv,
1135 char *buf)
1136 {
1137 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_wwan_emulstate);
1138 }
1139
1140 static ssize_t tpacpi_driver_wwan_emulstate_store(
1141 struct device_driver *drv,
1142 const char *buf, size_t count)
1143 {
1144 unsigned long t;
1145
1146 if (parse_strtoul(buf, 1, &t))
1147 return -EINVAL;
1148
1149 tpacpi_wwan_emulstate = !!t;
1150
1151 return count;
1152 }
1153
1154 static DRIVER_ATTR(wwan_emulstate, S_IWUSR | S_IRUGO,
1155 tpacpi_driver_wwan_emulstate_show,
1156 tpacpi_driver_wwan_emulstate_store);
1157
1158 /* uwb_emulstate ------------------------------------------------- */
1159 static ssize_t tpacpi_driver_uwb_emulstate_show(
1160 struct device_driver *drv,
1161 char *buf)
1162 {
1163 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_uwb_emulstate);
1164 }
1165
1166 static ssize_t tpacpi_driver_uwb_emulstate_store(
1167 struct device_driver *drv,
1168 const char *buf, size_t count)
1169 {
1170 unsigned long t;
1171
1172 if (parse_strtoul(buf, 1, &t))
1173 return -EINVAL;
1174
1175 tpacpi_uwb_emulstate = !!t;
1176
1177 return count;
1178 }
1179
1180 static DRIVER_ATTR(uwb_emulstate, S_IWUSR | S_IRUGO,
1181 tpacpi_driver_uwb_emulstate_show,
1182 tpacpi_driver_uwb_emulstate_store);
1183 #endif
1184
1185 /* --------------------------------------------------------------------- */
1186
1187 static struct driver_attribute *tpacpi_driver_attributes[] = {
1188 &driver_attr_debug_level, &driver_attr_version,
1189 &driver_attr_interface_version,
1190 };
1191
1192 static int __init tpacpi_create_driver_attributes(struct device_driver *drv)
1193 {
1194 int i, res;
1195
1196 i = 0;
1197 res = 0;
1198 while (!res && i < ARRAY_SIZE(tpacpi_driver_attributes)) {
1199 res = driver_create_file(drv, tpacpi_driver_attributes[i]);
1200 i++;
1201 }
1202
1203 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
1204 if (!res && dbg_wlswemul)
1205 res = driver_create_file(drv, &driver_attr_wlsw_emulstate);
1206 if (!res && dbg_bluetoothemul)
1207 res = driver_create_file(drv, &driver_attr_bluetooth_emulstate);
1208 if (!res && dbg_wwanemul)
1209 res = driver_create_file(drv, &driver_attr_wwan_emulstate);
1210 if (!res && dbg_uwbemul)
1211 res = driver_create_file(drv, &driver_attr_uwb_emulstate);
1212 #endif
1213
1214 return res;
1215 }
1216
1217 static void tpacpi_remove_driver_attributes(struct device_driver *drv)
1218 {
1219 int i;
1220
1221 for (i = 0; i < ARRAY_SIZE(tpacpi_driver_attributes); i++)
1222 driver_remove_file(drv, tpacpi_driver_attributes[i]);
1223
1224 #ifdef THINKPAD_ACPI_DEBUGFACILITIES
1225 driver_remove_file(drv, &driver_attr_wlsw_emulstate);
1226 driver_remove_file(drv, &driver_attr_bluetooth_emulstate);
1227 driver_remove_file(drv, &driver_attr_wwan_emulstate);
1228 driver_remove_file(drv, &driver_attr_uwb_emulstate);
1229 #endif
1230 }
1231
1232 /****************************************************************************
1233 ****************************************************************************
1234 *
1235 * Subdrivers
1236 *
1237 ****************************************************************************
1238 ****************************************************************************/
1239
1240 /*************************************************************************
1241 * thinkpad-acpi init subdriver
1242 */
1243
1244 static int __init thinkpad_acpi_driver_init(struct ibm_init_struct *iibm)
1245 {
1246 printk(TPACPI_INFO "%s v%s\n", TPACPI_DESC, TPACPI_VERSION);
1247 printk(TPACPI_INFO "%s\n", TPACPI_URL);
1248
1249 printk(TPACPI_INFO "ThinkPad BIOS %s, EC %s\n",
1250 (thinkpad_id.bios_version_str) ?
1251 thinkpad_id.bios_version_str : "unknown",
1252 (thinkpad_id.ec_version_str) ?
1253 thinkpad_id.ec_version_str : "unknown");
1254
1255 if (thinkpad_id.vendor && thinkpad_id.model_str)
1256 printk(TPACPI_INFO "%s %s, model %s\n",
1257 (thinkpad_id.vendor == PCI_VENDOR_ID_IBM) ?
1258 "IBM" : ((thinkpad_id.vendor ==
1259 PCI_VENDOR_ID_LENOVO) ?
1260 "Lenovo" : "Unknown vendor"),
1261 thinkpad_id.model_str,
1262 (thinkpad_id.nummodel_str) ?
1263 thinkpad_id.nummodel_str : "unknown");
1264
1265 return 0;
1266 }
1267
1268 static int thinkpad_acpi_driver_read(char *p)
1269 {
1270 int len = 0;
1271
1272 len += sprintf(p + len, "driver:\t\t%s\n", TPACPI_DESC);
1273 len += sprintf(p + len, "version:\t%s\n", TPACPI_VERSION);
1274
1275 return len;
1276 }
1277
1278 static struct ibm_struct thinkpad_acpi_driver_data = {
1279 .name = "driver",
1280 .read = thinkpad_acpi_driver_read,
1281 };
1282
1283 /*************************************************************************
1284 * Hotkey subdriver
1285 */
1286
1287 enum { /* hot key scan codes (derived from ACPI DSDT) */
1288 TP_ACPI_HOTKEYSCAN_FNF1 = 0,
1289 TP_ACPI_HOTKEYSCAN_FNF2,
1290 TP_ACPI_HOTKEYSCAN_FNF3,
1291 TP_ACPI_HOTKEYSCAN_FNF4,
1292 TP_ACPI_HOTKEYSCAN_FNF5,
1293 TP_ACPI_HOTKEYSCAN_FNF6,
1294 TP_ACPI_HOTKEYSCAN_FNF7,
1295 TP_ACPI_HOTKEYSCAN_FNF8,
1296 TP_ACPI_HOTKEYSCAN_FNF9,
1297 TP_ACPI_HOTKEYSCAN_FNF10,
1298 TP_ACPI_HOTKEYSCAN_FNF11,
1299 TP_ACPI_HOTKEYSCAN_FNF12,
1300 TP_ACPI_HOTKEYSCAN_FNBACKSPACE,
1301 TP_ACPI_HOTKEYSCAN_FNINSERT,
1302 TP_ACPI_HOTKEYSCAN_FNDELETE,
1303 TP_ACPI_HOTKEYSCAN_FNHOME,
1304 TP_ACPI_HOTKEYSCAN_FNEND,
1305 TP_ACPI_HOTKEYSCAN_FNPAGEUP,
1306 TP_ACPI_HOTKEYSCAN_FNPAGEDOWN,
1307 TP_ACPI_HOTKEYSCAN_FNSPACE,
1308 TP_ACPI_HOTKEYSCAN_VOLUMEUP,
1309 TP_ACPI_HOTKEYSCAN_VOLUMEDOWN,
1310 TP_ACPI_HOTKEYSCAN_MUTE,
1311 TP_ACPI_HOTKEYSCAN_THINKPAD,
1312 };
1313
1314 enum { /* Keys available through NVRAM polling */
1315 TPACPI_HKEY_NVRAM_KNOWN_MASK = 0x00fb88c0U,
1316 TPACPI_HKEY_NVRAM_GOOD_MASK = 0x00fb8000U,
1317 };
1318
1319 enum { /* Positions of some of the keys in hotkey masks */
1320 TP_ACPI_HKEY_DISPSWTCH_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF7,
1321 TP_ACPI_HKEY_DISPXPAND_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF8,
1322 TP_ACPI_HKEY_HIBERNATE_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF12,
1323 TP_ACPI_HKEY_BRGHTUP_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNHOME,
1324 TP_ACPI_HKEY_BRGHTDWN_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNEND,
1325 TP_ACPI_HKEY_THNKLGHT_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNPAGEUP,
1326 TP_ACPI_HKEY_ZOOM_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNSPACE,
1327 TP_ACPI_HKEY_VOLUP_MASK = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEUP,
1328 TP_ACPI_HKEY_VOLDWN_MASK = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEDOWN,
1329 TP_ACPI_HKEY_MUTE_MASK = 1 << TP_ACPI_HOTKEYSCAN_MUTE,
1330 TP_ACPI_HKEY_THINKPAD_MASK = 1 << TP_ACPI_HOTKEYSCAN_THINKPAD,
1331 };
1332
1333 enum { /* NVRAM to ACPI HKEY group map */
1334 TP_NVRAM_HKEY_GROUP_HK2 = TP_ACPI_HKEY_THINKPAD_MASK |
1335 TP_ACPI_HKEY_ZOOM_MASK |
1336 TP_ACPI_HKEY_DISPSWTCH_MASK |
1337 TP_ACPI_HKEY_HIBERNATE_MASK,
1338 TP_NVRAM_HKEY_GROUP_BRIGHTNESS = TP_ACPI_HKEY_BRGHTUP_MASK |
1339 TP_ACPI_HKEY_BRGHTDWN_MASK,
1340 TP_NVRAM_HKEY_GROUP_VOLUME = TP_ACPI_HKEY_VOLUP_MASK |
1341 TP_ACPI_HKEY_VOLDWN_MASK |
1342 TP_ACPI_HKEY_MUTE_MASK,
1343 };
1344
1345 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1346 struct tp_nvram_state {
1347 u16 thinkpad_toggle:1;
1348 u16 zoom_toggle:1;
1349 u16 display_toggle:1;
1350 u16 thinklight_toggle:1;
1351 u16 hibernate_toggle:1;
1352 u16 displayexp_toggle:1;
1353 u16 display_state:1;
1354 u16 brightness_toggle:1;
1355 u16 volume_toggle:1;
1356 u16 mute:1;
1357
1358 u8 brightness_level;
1359 u8 volume_level;
1360 };
1361
1362 static struct task_struct *tpacpi_hotkey_task;
1363 static u32 hotkey_source_mask; /* bit mask 0=ACPI,1=NVRAM */
1364 static int hotkey_poll_freq = 10; /* Hz */
1365 static struct mutex hotkey_thread_mutex;
1366 static struct mutex hotkey_thread_data_mutex;
1367 static unsigned int hotkey_config_change;
1368
1369 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1370
1371 #define hotkey_source_mask 0U
1372
1373 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1374
1375 static struct mutex hotkey_mutex;
1376
1377 static enum { /* Reasons for waking up */
1378 TP_ACPI_WAKEUP_NONE = 0, /* None or unknown */
1379 TP_ACPI_WAKEUP_BAYEJ, /* Bay ejection request */
1380 TP_ACPI_WAKEUP_UNDOCK, /* Undock request */
1381 } hotkey_wakeup_reason;
1382
1383 static int hotkey_autosleep_ack;
1384
1385 static int hotkey_orig_status;
1386 static u32 hotkey_orig_mask;
1387 static u32 hotkey_all_mask;
1388 static u32 hotkey_reserved_mask;
1389 static u32 hotkey_mask;
1390
1391 static unsigned int hotkey_report_mode;
1392
1393 static u16 *hotkey_keycode_map;
1394
1395 static struct attribute_set *hotkey_dev_attributes;
1396
1397 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1398 #define HOTKEY_CONFIG_CRITICAL_START \
1399 do { \
1400 mutex_lock(&hotkey_thread_data_mutex); \
1401 hotkey_config_change++; \
1402 } while (0);
1403 #define HOTKEY_CONFIG_CRITICAL_END \
1404 mutex_unlock(&hotkey_thread_data_mutex);
1405 #else
1406 #define HOTKEY_CONFIG_CRITICAL_START
1407 #define HOTKEY_CONFIG_CRITICAL_END
1408 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1409
1410 /* HKEY.MHKG() return bits */
1411 #define TP_HOTKEY_TABLET_MASK (1 << 3)
1412
1413 static int hotkey_get_wlsw(int *status)
1414 {
1415 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
1416 if (dbg_wlswemul) {
1417 *status = !!tpacpi_wlsw_emulstate;
1418 return 0;
1419 }
1420 #endif
1421 if (!acpi_evalf(hkey_handle, status, "WLSW", "d"))
1422 return -EIO;
1423 return 0;
1424 }
1425
1426 static int hotkey_get_tablet_mode(int *status)
1427 {
1428 int s;
1429
1430 if (!acpi_evalf(hkey_handle, &s, "MHKG", "d"))
1431 return -EIO;
1432
1433 *status = ((s & TP_HOTKEY_TABLET_MASK) != 0);
1434 return 0;
1435 }
1436
1437 /*
1438 * Call with hotkey_mutex held
1439 */
1440 static int hotkey_mask_get(void)
1441 {
1442 u32 m = 0;
1443
1444 if (tp_features.hotkey_mask) {
1445 if (!acpi_evalf(hkey_handle, &m, "DHKN", "d"))
1446 return -EIO;
1447 }
1448 hotkey_mask = m | (hotkey_source_mask & hotkey_mask);
1449
1450 return 0;
1451 }
1452
1453 /*
1454 * Call with hotkey_mutex held
1455 */
1456 static int hotkey_mask_set(u32 mask)
1457 {
1458 int i;
1459 int rc = 0;
1460
1461 if (tp_features.hotkey_mask) {
1462 if (!tp_warned.hotkey_mask_ff &&
1463 (mask == 0xffff || mask == 0xffffff ||
1464 mask == 0xffffffff)) {
1465 tp_warned.hotkey_mask_ff = 1;
1466 printk(TPACPI_NOTICE
1467 "setting the hotkey mask to 0x%08x is likely "
1468 "not the best way to go about it\n", mask);
1469 printk(TPACPI_NOTICE
1470 "please consider using the driver defaults, "
1471 "and refer to up-to-date thinkpad-acpi "
1472 "documentation\n");
1473 }
1474
1475 HOTKEY_CONFIG_CRITICAL_START
1476 for (i = 0; i < 32; i++) {
1477 u32 m = 1 << i;
1478 /* enable in firmware mask only keys not in NVRAM
1479 * mode, but enable the key in the cached hotkey_mask
1480 * regardless of mode, or the key will end up
1481 * disabled by hotkey_mask_get() */
1482 if (!acpi_evalf(hkey_handle,
1483 NULL, "MHKM", "vdd", i + 1,
1484 !!((mask & ~hotkey_source_mask) & m))) {
1485 rc = -EIO;
1486 break;
1487 } else {
1488 hotkey_mask = (hotkey_mask & ~m) | (mask & m);
1489 }
1490 }
1491 HOTKEY_CONFIG_CRITICAL_END
1492
1493 /* hotkey_mask_get must be called unconditionally below */
1494 if (!hotkey_mask_get() && !rc &&
1495 (hotkey_mask & ~hotkey_source_mask) !=
1496 (mask & ~hotkey_source_mask)) {
1497 printk(TPACPI_NOTICE
1498 "requested hot key mask 0x%08x, but "
1499 "firmware forced it to 0x%08x\n",
1500 mask, hotkey_mask);
1501 }
1502 } else {
1503 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1504 HOTKEY_CONFIG_CRITICAL_START
1505 hotkey_mask = mask & hotkey_source_mask;
1506 HOTKEY_CONFIG_CRITICAL_END
1507 hotkey_mask_get();
1508 if (hotkey_mask != mask) {
1509 printk(TPACPI_NOTICE
1510 "requested hot key mask 0x%08x, "
1511 "forced to 0x%08x (NVRAM poll mask is "
1512 "0x%08x): no firmware mask support\n",
1513 mask, hotkey_mask, hotkey_source_mask);
1514 }
1515 #else
1516 hotkey_mask_get();
1517 rc = -ENXIO;
1518 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1519 }
1520
1521 return rc;
1522 }
1523
1524 static int hotkey_status_get(int *status)
1525 {
1526 if (!acpi_evalf(hkey_handle, status, "DHKC", "d"))
1527 return -EIO;
1528
1529 return 0;
1530 }
1531
1532 static int hotkey_status_set(int status)
1533 {
1534 if (!acpi_evalf(hkey_handle, NULL, "MHKC", "vd", status))
1535 return -EIO;
1536
1537 return 0;
1538 }
1539
1540 static void tpacpi_input_send_tabletsw(void)
1541 {
1542 int state;
1543
1544 if (tp_features.hotkey_tablet &&
1545 !hotkey_get_tablet_mode(&state)) {
1546 mutex_lock(&tpacpi_inputdev_send_mutex);
1547
1548 input_report_switch(tpacpi_inputdev,
1549 SW_TABLET_MODE, !!state);
1550 input_sync(tpacpi_inputdev);
1551
1552 mutex_unlock(&tpacpi_inputdev_send_mutex);
1553 }
1554 }
1555
1556 static void tpacpi_input_send_key(unsigned int scancode)
1557 {
1558 unsigned int keycode;
1559
1560 keycode = hotkey_keycode_map[scancode];
1561
1562 if (keycode != KEY_RESERVED) {
1563 mutex_lock(&tpacpi_inputdev_send_mutex);
1564
1565 input_report_key(tpacpi_inputdev, keycode, 1);
1566 if (keycode == KEY_UNKNOWN)
1567 input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN,
1568 scancode);
1569 input_sync(tpacpi_inputdev);
1570
1571 input_report_key(tpacpi_inputdev, keycode, 0);
1572 if (keycode == KEY_UNKNOWN)
1573 input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN,
1574 scancode);
1575 input_sync(tpacpi_inputdev);
1576
1577 mutex_unlock(&tpacpi_inputdev_send_mutex);
1578 }
1579 }
1580
1581 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1582 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver;
1583
1584 static void tpacpi_hotkey_send_key(unsigned int scancode)
1585 {
1586 tpacpi_input_send_key(scancode);
1587 if (hotkey_report_mode < 2) {
1588 acpi_bus_generate_proc_event(ibm_hotkey_acpidriver.device,
1589 0x80, 0x1001 + scancode);
1590 }
1591 }
1592
1593 static void hotkey_read_nvram(struct tp_nvram_state *n, u32 m)
1594 {
1595 u8 d;
1596
1597 if (m & TP_NVRAM_HKEY_GROUP_HK2) {
1598 d = nvram_read_byte(TP_NVRAM_ADDR_HK2);
1599 n->thinkpad_toggle = !!(d & TP_NVRAM_MASK_HKT_THINKPAD);
1600 n->zoom_toggle = !!(d & TP_NVRAM_MASK_HKT_ZOOM);
1601 n->display_toggle = !!(d & TP_NVRAM_MASK_HKT_DISPLAY);
1602 n->hibernate_toggle = !!(d & TP_NVRAM_MASK_HKT_HIBERNATE);
1603 }
1604 if (m & TP_ACPI_HKEY_THNKLGHT_MASK) {
1605 d = nvram_read_byte(TP_NVRAM_ADDR_THINKLIGHT);
1606 n->thinklight_toggle = !!(d & TP_NVRAM_MASK_THINKLIGHT);
1607 }
1608 if (m & TP_ACPI_HKEY_DISPXPAND_MASK) {
1609 d = nvram_read_byte(TP_NVRAM_ADDR_VIDEO);
1610 n->displayexp_toggle =
1611 !!(d & TP_NVRAM_MASK_HKT_DISPEXPND);
1612 }
1613 if (m & TP_NVRAM_HKEY_GROUP_BRIGHTNESS) {
1614 d = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS);
1615 n->brightness_level = (d & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
1616 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
1617 n->brightness_toggle =
1618 !!(d & TP_NVRAM_MASK_HKT_BRIGHTNESS);
1619 }
1620 if (m & TP_NVRAM_HKEY_GROUP_VOLUME) {
1621 d = nvram_read_byte(TP_NVRAM_ADDR_MIXER);
1622 n->volume_level = (d & TP_NVRAM_MASK_LEVEL_VOLUME)
1623 >> TP_NVRAM_POS_LEVEL_VOLUME;
1624 n->mute = !!(d & TP_NVRAM_MASK_MUTE);
1625 n->volume_toggle = !!(d & TP_NVRAM_MASK_HKT_VOLUME);
1626 }
1627 }
1628
1629 #define TPACPI_COMPARE_KEY(__scancode, __member) \
1630 do { \
1631 if ((mask & (1 << __scancode)) && \
1632 oldn->__member != newn->__member) \
1633 tpacpi_hotkey_send_key(__scancode); \
1634 } while (0)
1635
1636 #define TPACPI_MAY_SEND_KEY(__scancode) \
1637 do { if (mask & (1 << __scancode)) \
1638 tpacpi_hotkey_send_key(__scancode); } while (0)
1639
1640 static void hotkey_compare_and_issue_event(struct tp_nvram_state *oldn,
1641 struct tp_nvram_state *newn,
1642 u32 mask)
1643 {
1644 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_THINKPAD, thinkpad_toggle);
1645 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNSPACE, zoom_toggle);
1646 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF7, display_toggle);
1647 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF12, hibernate_toggle);
1648
1649 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNPAGEUP, thinklight_toggle);
1650
1651 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF8, displayexp_toggle);
1652
1653 /* handle volume */
1654 if (oldn->volume_toggle != newn->volume_toggle) {
1655 if (oldn->mute != newn->mute) {
1656 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE);
1657 }
1658 if (oldn->volume_level > newn->volume_level) {
1659 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
1660 } else if (oldn->volume_level < newn->volume_level) {
1661 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
1662 } else if (oldn->mute == newn->mute) {
1663 /* repeated key presses that didn't change state */
1664 if (newn->mute) {
1665 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE);
1666 } else if (newn->volume_level != 0) {
1667 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
1668 } else {
1669 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
1670 }
1671 }
1672 }
1673
1674 /* handle brightness */
1675 if (oldn->brightness_toggle != newn->brightness_toggle) {
1676 if (oldn->brightness_level < newn->brightness_level) {
1677 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
1678 } else if (oldn->brightness_level > newn->brightness_level) {
1679 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
1680 } else {
1681 /* repeated key presses that didn't change state */
1682 if (newn->brightness_level != 0) {
1683 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
1684 } else {
1685 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
1686 }
1687 }
1688 }
1689 }
1690
1691 #undef TPACPI_COMPARE_KEY
1692 #undef TPACPI_MAY_SEND_KEY
1693
1694 static int hotkey_kthread(void *data)
1695 {
1696 struct tp_nvram_state s[2];
1697 u32 mask;
1698 unsigned int si, so;
1699 unsigned long t;
1700 unsigned int change_detector, must_reset;
1701
1702 mutex_lock(&hotkey_thread_mutex);
1703
1704 if (tpacpi_lifecycle == TPACPI_LIFE_EXITING)
1705 goto exit;
1706
1707 set_freezable();
1708
1709 so = 0;
1710 si = 1;
1711 t = 0;
1712
1713 /* Initial state for compares */
1714 mutex_lock(&hotkey_thread_data_mutex);
1715 change_detector = hotkey_config_change;
1716 mask = hotkey_source_mask & hotkey_mask;
1717 mutex_unlock(&hotkey_thread_data_mutex);
1718 hotkey_read_nvram(&s[so], mask);
1719
1720 while (!kthread_should_stop() && hotkey_poll_freq) {
1721 if (t == 0)
1722 t = 1000/hotkey_poll_freq;
1723 t = msleep_interruptible(t);
1724 if (unlikely(kthread_should_stop()))
1725 break;
1726 must_reset = try_to_freeze();
1727 if (t > 0 && !must_reset)
1728 continue;
1729
1730 mutex_lock(&hotkey_thread_data_mutex);
1731 if (must_reset || hotkey_config_change != change_detector) {
1732 /* forget old state on thaw or config change */
1733 si = so;
1734 t = 0;
1735 change_detector = hotkey_config_change;
1736 }
1737 mask = hotkey_source_mask & hotkey_mask;
1738 mutex_unlock(&hotkey_thread_data_mutex);
1739
1740 if (likely(mask)) {
1741 hotkey_read_nvram(&s[si], mask);
1742 if (likely(si != so)) {
1743 hotkey_compare_and_issue_event(&s[so], &s[si],
1744 mask);
1745 }
1746 }
1747
1748 so = si;
1749 si ^= 1;
1750 }
1751
1752 exit:
1753 mutex_unlock(&hotkey_thread_mutex);
1754 return 0;
1755 }
1756
1757 static void hotkey_poll_stop_sync(void)
1758 {
1759 if (tpacpi_hotkey_task) {
1760 if (frozen(tpacpi_hotkey_task) ||
1761 freezing(tpacpi_hotkey_task))
1762 thaw_process(tpacpi_hotkey_task);
1763
1764 kthread_stop(tpacpi_hotkey_task);
1765 tpacpi_hotkey_task = NULL;
1766 mutex_lock(&hotkey_thread_mutex);
1767 /* at this point, the thread did exit */
1768 mutex_unlock(&hotkey_thread_mutex);
1769 }
1770 }
1771
1772 /* call with hotkey_mutex held */
1773 static void hotkey_poll_setup(int may_warn)
1774 {
1775 if ((hotkey_source_mask & hotkey_mask) != 0 &&
1776 hotkey_poll_freq > 0 &&
1777 (tpacpi_inputdev->users > 0 || hotkey_report_mode < 2)) {
1778 if (!tpacpi_hotkey_task) {
1779 tpacpi_hotkey_task = kthread_run(hotkey_kthread,
1780 NULL, TPACPI_NVRAM_KTHREAD_NAME);
1781 if (IS_ERR(tpacpi_hotkey_task)) {
1782 tpacpi_hotkey_task = NULL;
1783 printk(TPACPI_ERR
1784 "could not create kernel thread "
1785 "for hotkey polling\n");
1786 }
1787 }
1788 } else {
1789 hotkey_poll_stop_sync();
1790 if (may_warn &&
1791 hotkey_source_mask != 0 && hotkey_poll_freq == 0) {
1792 printk(TPACPI_NOTICE
1793 "hot keys 0x%08x require polling, "
1794 "which is currently disabled\n",
1795 hotkey_source_mask);
1796 }
1797 }
1798 }
1799
1800 static void hotkey_poll_setup_safe(int may_warn)
1801 {
1802 mutex_lock(&hotkey_mutex);
1803 hotkey_poll_setup(may_warn);
1804 mutex_unlock(&hotkey_mutex);
1805 }
1806
1807 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1808
1809 static void hotkey_poll_setup_safe(int __unused)
1810 {
1811 }
1812
1813 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1814
1815 static int hotkey_inputdev_open(struct input_dev *dev)
1816 {
1817 switch (tpacpi_lifecycle) {
1818 case TPACPI_LIFE_INIT:
1819 /*
1820 * hotkey_init will call hotkey_poll_setup_safe
1821 * at the appropriate moment
1822 */
1823 return 0;
1824 case TPACPI_LIFE_EXITING:
1825 return -EBUSY;
1826 case TPACPI_LIFE_RUNNING:
1827 hotkey_poll_setup_safe(0);
1828 return 0;
1829 }
1830
1831 /* Should only happen if tpacpi_lifecycle is corrupt */
1832 BUG();
1833 return -EBUSY;
1834 }
1835
1836 static void hotkey_inputdev_close(struct input_dev *dev)
1837 {
1838 /* disable hotkey polling when possible */
1839 if (tpacpi_lifecycle == TPACPI_LIFE_RUNNING)
1840 hotkey_poll_setup_safe(0);
1841 }
1842
1843 /* sysfs hotkey enable ------------------------------------------------- */
1844 static ssize_t hotkey_enable_show(struct device *dev,
1845 struct device_attribute *attr,
1846 char *buf)
1847 {
1848 int res, status;
1849
1850 res = hotkey_status_get(&status);
1851 if (res)
1852 return res;
1853
1854 return snprintf(buf, PAGE_SIZE, "%d\n", status);
1855 }
1856
1857 static ssize_t hotkey_enable_store(struct device *dev,
1858 struct device_attribute *attr,
1859 const char *buf, size_t count)
1860 {
1861 unsigned long t;
1862 int res;
1863
1864 if (parse_strtoul(buf, 1, &t))
1865 return -EINVAL;
1866
1867 res = hotkey_status_set(t);
1868
1869 return (res) ? res : count;
1870 }
1871
1872 static struct device_attribute dev_attr_hotkey_enable =
1873 __ATTR(hotkey_enable, S_IWUSR | S_IRUGO,
1874 hotkey_enable_show, hotkey_enable_store);
1875
1876 /* sysfs hotkey mask --------------------------------------------------- */
1877 static ssize_t hotkey_mask_show(struct device *dev,
1878 struct device_attribute *attr,
1879 char *buf)
1880 {
1881 int res;
1882
1883 if (mutex_lock_killable(&hotkey_mutex))
1884 return -ERESTARTSYS;
1885 res = hotkey_mask_get();
1886 mutex_unlock(&hotkey_mutex);
1887
1888 return (res)?
1889 res : snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_mask);
1890 }
1891
1892 static ssize_t hotkey_mask_store(struct device *dev,
1893 struct device_attribute *attr,
1894 const char *buf, size_t count)
1895 {
1896 unsigned long t;
1897 int res;
1898
1899 if (parse_strtoul(buf, 0xffffffffUL, &t))
1900 return -EINVAL;
1901
1902 if (mutex_lock_killable(&hotkey_mutex))
1903 return -ERESTARTSYS;
1904
1905 res = hotkey_mask_set(t);
1906
1907 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1908 hotkey_poll_setup(1);
1909 #endif
1910
1911 mutex_unlock(&hotkey_mutex);
1912
1913 return (res) ? res : count;
1914 }
1915
1916 static struct device_attribute dev_attr_hotkey_mask =
1917 __ATTR(hotkey_mask, S_IWUSR | S_IRUGO,
1918 hotkey_mask_show, hotkey_mask_store);
1919
1920 /* sysfs hotkey bios_enabled ------------------------------------------- */
1921 static ssize_t hotkey_bios_enabled_show(struct device *dev,
1922 struct device_attribute *attr,
1923 char *buf)
1924 {
1925 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_orig_status);
1926 }
1927
1928 static struct device_attribute dev_attr_hotkey_bios_enabled =
1929 __ATTR(hotkey_bios_enabled, S_IRUGO, hotkey_bios_enabled_show, NULL);
1930
1931 /* sysfs hotkey bios_mask ---------------------------------------------- */
1932 static ssize_t hotkey_bios_mask_show(struct device *dev,
1933 struct device_attribute *attr,
1934 char *buf)
1935 {
1936 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_orig_mask);
1937 }
1938
1939 static struct device_attribute dev_attr_hotkey_bios_mask =
1940 __ATTR(hotkey_bios_mask, S_IRUGO, hotkey_bios_mask_show, NULL);
1941
1942 /* sysfs hotkey all_mask ----------------------------------------------- */
1943 static ssize_t hotkey_all_mask_show(struct device *dev,
1944 struct device_attribute *attr,
1945 char *buf)
1946 {
1947 return snprintf(buf, PAGE_SIZE, "0x%08x\n",
1948 hotkey_all_mask | hotkey_source_mask);
1949 }
1950
1951 static struct device_attribute dev_attr_hotkey_all_mask =
1952 __ATTR(hotkey_all_mask, S_IRUGO, hotkey_all_mask_show, NULL);
1953
1954 /* sysfs hotkey recommended_mask --------------------------------------- */
1955 static ssize_t hotkey_recommended_mask_show(struct device *dev,
1956 struct device_attribute *attr,
1957 char *buf)
1958 {
1959 return snprintf(buf, PAGE_SIZE, "0x%08x\n",
1960 (hotkey_all_mask | hotkey_source_mask)
1961 & ~hotkey_reserved_mask);
1962 }
1963
1964 static struct device_attribute dev_attr_hotkey_recommended_mask =
1965 __ATTR(hotkey_recommended_mask, S_IRUGO,
1966 hotkey_recommended_mask_show, NULL);
1967
1968 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1969
1970 /* sysfs hotkey hotkey_source_mask ------------------------------------- */
1971 static ssize_t hotkey_source_mask_show(struct device *dev,
1972 struct device_attribute *attr,
1973 char *buf)
1974 {
1975 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_source_mask);
1976 }
1977
1978 static ssize_t hotkey_source_mask_store(struct device *dev,
1979 struct device_attribute *attr,
1980 const char *buf, size_t count)
1981 {
1982 unsigned long t;
1983
1984 if (parse_strtoul(buf, 0xffffffffUL, &t) ||
1985 ((t & ~TPACPI_HKEY_NVRAM_KNOWN_MASK) != 0))
1986 return -EINVAL;
1987
1988 if (mutex_lock_killable(&hotkey_mutex))
1989 return -ERESTARTSYS;
1990
1991 HOTKEY_CONFIG_CRITICAL_START
1992 hotkey_source_mask = t;
1993 HOTKEY_CONFIG_CRITICAL_END
1994
1995 hotkey_poll_setup(1);
1996
1997 mutex_unlock(&hotkey_mutex);
1998
1999 return count;
2000 }
2001
2002 static struct device_attribute dev_attr_hotkey_source_mask =
2003 __ATTR(hotkey_source_mask, S_IWUSR | S_IRUGO,
2004 hotkey_source_mask_show, hotkey_source_mask_store);
2005
2006 /* sysfs hotkey hotkey_poll_freq --------------------------------------- */
2007 static ssize_t hotkey_poll_freq_show(struct device *dev,
2008 struct device_attribute *attr,
2009 char *buf)
2010 {
2011 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_poll_freq);
2012 }
2013
2014 static ssize_t hotkey_poll_freq_store(struct device *dev,
2015 struct device_attribute *attr,
2016 const char *buf, size_t count)
2017 {
2018 unsigned long t;
2019
2020 if (parse_strtoul(buf, 25, &t))
2021 return -EINVAL;
2022
2023 if (mutex_lock_killable(&hotkey_mutex))
2024 return -ERESTARTSYS;
2025
2026 hotkey_poll_freq = t;
2027
2028 hotkey_poll_setup(1);
2029 mutex_unlock(&hotkey_mutex);
2030
2031 return count;
2032 }
2033
2034 static struct device_attribute dev_attr_hotkey_poll_freq =
2035 __ATTR(hotkey_poll_freq, S_IWUSR | S_IRUGO,
2036 hotkey_poll_freq_show, hotkey_poll_freq_store);
2037
2038 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2039
2040 /* sysfs hotkey radio_sw (pollable) ------------------------------------ */
2041 static ssize_t hotkey_radio_sw_show(struct device *dev,
2042 struct device_attribute *attr,
2043 char *buf)
2044 {
2045 int res, s;
2046 res = hotkey_get_wlsw(&s);
2047 if (res < 0)
2048 return res;
2049
2050 return snprintf(buf, PAGE_SIZE, "%d\n", !!s);
2051 }
2052
2053 static struct device_attribute dev_attr_hotkey_radio_sw =
2054 __ATTR(hotkey_radio_sw, S_IRUGO, hotkey_radio_sw_show, NULL);
2055
2056 static void hotkey_radio_sw_notify_change(void)
2057 {
2058 if (tp_features.hotkey_wlsw)
2059 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2060 "hotkey_radio_sw");
2061 }
2062
2063 /* sysfs hotkey tablet mode (pollable) --------------------------------- */
2064 static ssize_t hotkey_tablet_mode_show(struct device *dev,
2065 struct device_attribute *attr,
2066 char *buf)
2067 {
2068 int res, s;
2069 res = hotkey_get_tablet_mode(&s);
2070 if (res < 0)
2071 return res;
2072
2073 return snprintf(buf, PAGE_SIZE, "%d\n", !!s);
2074 }
2075
2076 static struct device_attribute dev_attr_hotkey_tablet_mode =
2077 __ATTR(hotkey_tablet_mode, S_IRUGO, hotkey_tablet_mode_show, NULL);
2078
2079 static void hotkey_tablet_mode_notify_change(void)
2080 {
2081 if (tp_features.hotkey_tablet)
2082 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2083 "hotkey_tablet_mode");
2084 }
2085
2086 /* sysfs hotkey report_mode -------------------------------------------- */
2087 static ssize_t hotkey_report_mode_show(struct device *dev,
2088 struct device_attribute *attr,
2089 char *buf)
2090 {
2091 return snprintf(buf, PAGE_SIZE, "%d\n",
2092 (hotkey_report_mode != 0) ? hotkey_report_mode : 1);
2093 }
2094
2095 static struct device_attribute dev_attr_hotkey_report_mode =
2096 __ATTR(hotkey_report_mode, S_IRUGO, hotkey_report_mode_show, NULL);
2097
2098 /* sysfs wakeup reason (pollable) -------------------------------------- */
2099 static ssize_t hotkey_wakeup_reason_show(struct device *dev,
2100 struct device_attribute *attr,
2101 char *buf)
2102 {
2103 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_wakeup_reason);
2104 }
2105
2106 static struct device_attribute dev_attr_hotkey_wakeup_reason =
2107 __ATTR(wakeup_reason, S_IRUGO, hotkey_wakeup_reason_show, NULL);
2108
2109 static void hotkey_wakeup_reason_notify_change(void)
2110 {
2111 if (tp_features.hotkey_mask)
2112 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2113 "wakeup_reason");
2114 }
2115
2116 /* sysfs wakeup hotunplug_complete (pollable) -------------------------- */
2117 static ssize_t hotkey_wakeup_hotunplug_complete_show(struct device *dev,
2118 struct device_attribute *attr,
2119 char *buf)
2120 {
2121 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_autosleep_ack);
2122 }
2123
2124 static struct device_attribute dev_attr_hotkey_wakeup_hotunplug_complete =
2125 __ATTR(wakeup_hotunplug_complete, S_IRUGO,
2126 hotkey_wakeup_hotunplug_complete_show, NULL);
2127
2128 static void hotkey_wakeup_hotunplug_complete_notify_change(void)
2129 {
2130 if (tp_features.hotkey_mask)
2131 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2132 "wakeup_hotunplug_complete");
2133 }
2134
2135 /* --------------------------------------------------------------------- */
2136
2137 static struct attribute *hotkey_attributes[] __initdata = {
2138 &dev_attr_hotkey_enable.attr,
2139 &dev_attr_hotkey_bios_enabled.attr,
2140 &dev_attr_hotkey_report_mode.attr,
2141 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2142 &dev_attr_hotkey_mask.attr,
2143 &dev_attr_hotkey_all_mask.attr,
2144 &dev_attr_hotkey_recommended_mask.attr,
2145 &dev_attr_hotkey_source_mask.attr,
2146 &dev_attr_hotkey_poll_freq.attr,
2147 #endif
2148 };
2149
2150 static struct attribute *hotkey_mask_attributes[] __initdata = {
2151 &dev_attr_hotkey_bios_mask.attr,
2152 #ifndef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2153 &dev_attr_hotkey_mask.attr,
2154 &dev_attr_hotkey_all_mask.attr,
2155 &dev_attr_hotkey_recommended_mask.attr,
2156 #endif
2157 &dev_attr_hotkey_wakeup_reason.attr,
2158 &dev_attr_hotkey_wakeup_hotunplug_complete.attr,
2159 };
2160
2161 static void bluetooth_update_rfk(void);
2162 static void wan_update_rfk(void);
2163 static void uwb_update_rfk(void);
2164 static void tpacpi_send_radiosw_update(void)
2165 {
2166 int wlsw;
2167
2168 /* Sync these BEFORE sending any rfkill events */
2169 if (tp_features.bluetooth)
2170 bluetooth_update_rfk();
2171 if (tp_features.wan)
2172 wan_update_rfk();
2173 if (tp_features.uwb)
2174 uwb_update_rfk();
2175
2176 if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&wlsw)) {
2177 mutex_lock(&tpacpi_inputdev_send_mutex);
2178
2179 input_report_switch(tpacpi_inputdev,
2180 SW_RFKILL_ALL, !!wlsw);
2181 input_sync(tpacpi_inputdev);
2182
2183 mutex_unlock(&tpacpi_inputdev_send_mutex);
2184 }
2185 hotkey_radio_sw_notify_change();
2186 }
2187
2188 static void hotkey_exit(void)
2189 {
2190 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2191 hotkey_poll_stop_sync();
2192 #endif
2193
2194 if (hotkey_dev_attributes)
2195 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
2196
2197 kfree(hotkey_keycode_map);
2198
2199 if (tp_features.hotkey) {
2200 dbg_printk(TPACPI_DBG_EXIT,
2201 "restoring original hot key mask\n");
2202 /* no short-circuit boolean operator below! */
2203 if ((hotkey_mask_set(hotkey_orig_mask) |
2204 hotkey_status_set(hotkey_orig_status)) != 0)
2205 printk(TPACPI_ERR
2206 "failed to restore hot key mask "
2207 "to BIOS defaults\n");
2208 }
2209 }
2210
2211 static int __init hotkey_init(struct ibm_init_struct *iibm)
2212 {
2213 /* Requirements for changing the default keymaps:
2214 *
2215 * 1. Many of the keys are mapped to KEY_RESERVED for very
2216 * good reasons. Do not change them unless you have deep
2217 * knowledge on the IBM and Lenovo ThinkPad firmware for
2218 * the various ThinkPad models. The driver behaves
2219 * differently for KEY_RESERVED: such keys have their
2220 * hot key mask *unset* in mask_recommended, and also
2221 * in the initial hot key mask programmed into the
2222 * firmware at driver load time, which means the firm-
2223 * ware may react very differently if you change them to
2224 * something else;
2225 *
2226 * 2. You must be subscribed to the linux-thinkpad and
2227 * ibm-acpi-devel mailing lists, and you should read the
2228 * list archives since 2007 if you want to change the
2229 * keymaps. This requirement exists so that you will
2230 * know the past history of problems with the thinkpad-
2231 * acpi driver keymaps, and also that you will be
2232 * listening to any bug reports;
2233 *
2234 * 3. Do not send thinkpad-acpi specific patches directly to
2235 * for merging, *ever*. Send them to the linux-acpi
2236 * mailinglist for comments. Merging is to be done only
2237 * through acpi-test and the ACPI maintainer.
2238 *
2239 * If the above is too much to ask, don't change the keymap.
2240 * Ask the thinkpad-acpi maintainer to do it, instead.
2241 */
2242 static u16 ibm_keycode_map[] __initdata = {
2243 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
2244 KEY_FN_F1, KEY_FN_F2, KEY_COFFEE, KEY_SLEEP,
2245 KEY_WLAN, KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
2246 KEY_FN_F9, KEY_FN_F10, KEY_FN_F11, KEY_SUSPEND,
2247
2248 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
2249 KEY_UNKNOWN, /* 0x0C: FN+BACKSPACE */
2250 KEY_UNKNOWN, /* 0x0D: FN+INSERT */
2251 KEY_UNKNOWN, /* 0x0E: FN+DELETE */
2252
2253 /* brightness: firmware always reacts to them, unless
2254 * X.org did some tricks in the radeon BIOS scratch
2255 * registers of *some* models */
2256 KEY_RESERVED, /* 0x0F: FN+HOME (brightness up) */
2257 KEY_RESERVED, /* 0x10: FN+END (brightness down) */
2258
2259 /* Thinklight: firmware always react to it */
2260 KEY_RESERVED, /* 0x11: FN+PGUP (thinklight toggle) */
2261
2262 KEY_UNKNOWN, /* 0x12: FN+PGDOWN */
2263 KEY_ZOOM, /* 0x13: FN+SPACE (zoom) */
2264
2265 /* Volume: firmware always react to it and reprograms
2266 * the built-in *extra* mixer. Never map it to control
2267 * another mixer by default. */
2268 KEY_RESERVED, /* 0x14: VOLUME UP */
2269 KEY_RESERVED, /* 0x15: VOLUME DOWN */
2270 KEY_RESERVED, /* 0x16: MUTE */
2271
2272 KEY_VENDOR, /* 0x17: Thinkpad/AccessIBM/Lenovo */
2273
2274 /* (assignments unknown, please report if found) */
2275 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
2276 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
2277 };
2278 static u16 lenovo_keycode_map[] __initdata = {
2279 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
2280 KEY_FN_F1, KEY_COFFEE, KEY_BATTERY, KEY_SLEEP,
2281 KEY_WLAN, KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
2282 KEY_FN_F9, KEY_FN_F10, KEY_FN_F11, KEY_SUSPEND,
2283
2284 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
2285 KEY_UNKNOWN, /* 0x0C: FN+BACKSPACE */
2286 KEY_UNKNOWN, /* 0x0D: FN+INSERT */
2287 KEY_UNKNOWN, /* 0x0E: FN+DELETE */
2288
2289 /* These either have to go through ACPI video, or
2290 * act like in the IBM ThinkPads, so don't ever
2291 * enable them by default */
2292 KEY_RESERVED, /* 0x0F: FN+HOME (brightness up) */
2293 KEY_RESERVED, /* 0x10: FN+END (brightness down) */
2294
2295 KEY_RESERVED, /* 0x11: FN+PGUP (thinklight toggle) */
2296
2297 KEY_UNKNOWN, /* 0x12: FN+PGDOWN */
2298 KEY_ZOOM, /* 0x13: FN+SPACE (zoom) */
2299
2300 /* Volume: z60/z61, T60 (BIOS version?): firmware always
2301 * react to it and reprograms the built-in *extra* mixer.
2302 * Never map it to control another mixer by default.
2303 *
2304 * T60?, T61, R60?, R61: firmware and EC tries to send
2305 * these over the regular keyboard, so these are no-ops,
2306 * but there are still weird bugs re. MUTE, so do not
2307 * change unless you get test reports from all Lenovo
2308 * models. May cause the BIOS to interfere with the
2309 * HDA mixer.
2310 */
2311 KEY_RESERVED, /* 0x14: VOLUME UP */
2312 KEY_RESERVED, /* 0x15: VOLUME DOWN */
2313 KEY_RESERVED, /* 0x16: MUTE */
2314
2315 KEY_VENDOR, /* 0x17: Thinkpad/AccessIBM/Lenovo */
2316
2317 /* (assignments unknown, please report if found) */
2318 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
2319 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
2320 };
2321
2322 #define TPACPI_HOTKEY_MAP_LEN ARRAY_SIZE(ibm_keycode_map)
2323 #define TPACPI_HOTKEY_MAP_SIZE sizeof(ibm_keycode_map)
2324 #define TPACPI_HOTKEY_MAP_TYPESIZE sizeof(ibm_keycode_map[0])
2325
2326 int res, i;
2327 int status;
2328 int hkeyv;
2329
2330 vdbg_printk(TPACPI_DBG_INIT, "initializing hotkey subdriver\n");
2331
2332 BUG_ON(!tpacpi_inputdev);
2333 BUG_ON(tpacpi_inputdev->open != NULL ||
2334 tpacpi_inputdev->close != NULL);
2335
2336 TPACPI_ACPIHANDLE_INIT(hkey);
2337 mutex_init(&hotkey_mutex);
2338
2339 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2340 mutex_init(&hotkey_thread_mutex);
2341 mutex_init(&hotkey_thread_data_mutex);
2342 #endif
2343
2344 /* hotkey not supported on 570 */
2345 tp_features.hotkey = hkey_handle != NULL;
2346
2347 vdbg_printk(TPACPI_DBG_INIT, "hotkeys are %s\n",
2348 str_supported(tp_features.hotkey));
2349
2350 if (!tp_features.hotkey)
2351 return 1;
2352
2353 tpacpi_disable_brightness_delay();
2354
2355 hotkey_dev_attributes = create_attr_set(13, NULL);
2356 if (!hotkey_dev_attributes)
2357 return -ENOMEM;
2358 res = add_many_to_attr_set(hotkey_dev_attributes,
2359 hotkey_attributes,
2360 ARRAY_SIZE(hotkey_attributes));
2361 if (res)
2362 goto err_exit;
2363
2364 /* mask not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
2365 A30, R30, R31, T20-22, X20-21, X22-24. Detected by checking
2366 for HKEY interface version 0x100 */
2367 if (acpi_evalf(hkey_handle, &hkeyv, "MHKV", "qd")) {
2368 if ((hkeyv >> 8) != 1) {
2369 printk(TPACPI_ERR "unknown version of the "
2370 "HKEY interface: 0x%x\n", hkeyv);
2371 printk(TPACPI_ERR "please report this to %s\n",
2372 TPACPI_MAIL);
2373 } else {
2374 /*
2375 * MHKV 0x100 in A31, R40, R40e,
2376 * T4x, X31, and later
2377 */
2378 tp_features.hotkey_mask = 1;
2379 }
2380 }
2381
2382 vdbg_printk(TPACPI_DBG_INIT, "hotkey masks are %s\n",
2383 str_supported(tp_features.hotkey_mask));
2384
2385 if (tp_features.hotkey_mask) {
2386 if (!acpi_evalf(hkey_handle, &hotkey_all_mask,
2387 "MHKA", "qd")) {
2388 printk(TPACPI_ERR
2389 "missing MHKA handler, "
2390 "please report this to %s\n",
2391 TPACPI_MAIL);
2392 /* FN+F12, FN+F4, FN+F3 */
2393 hotkey_all_mask = 0x080cU;
2394 }
2395 }
2396
2397 /* hotkey_source_mask *must* be zero for
2398 * the first hotkey_mask_get */
2399 res = hotkey_status_get(&hotkey_orig_status);
2400 if (res)
2401 goto err_exit;
2402
2403 if (tp_features.hotkey_mask) {
2404 res = hotkey_mask_get();
2405 if (res)
2406 goto err_exit;
2407
2408 hotkey_orig_mask = hotkey_mask;
2409 res = add_many_to_attr_set(
2410 hotkey_dev_attributes,
2411 hotkey_mask_attributes,
2412 ARRAY_SIZE(hotkey_mask_attributes));
2413 if (res)
2414 goto err_exit;
2415 }
2416
2417 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2418 if (tp_features.hotkey_mask) {
2419 hotkey_source_mask = TPACPI_HKEY_NVRAM_GOOD_MASK
2420 & ~hotkey_all_mask;
2421 } else {
2422 hotkey_source_mask = TPACPI_HKEY_NVRAM_GOOD_MASK;
2423 }
2424
2425 vdbg_printk(TPACPI_DBG_INIT,
2426 "hotkey source mask 0x%08x, polling freq %d\n",
2427 hotkey_source_mask, hotkey_poll_freq);
2428 #endif
2429
2430 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
2431 if (dbg_wlswemul) {
2432 tp_features.hotkey_wlsw = 1;
2433 printk(TPACPI_INFO
2434 "radio switch emulation enabled\n");
2435 } else
2436 #endif
2437 /* Not all thinkpads have a hardware radio switch */
2438 if (acpi_evalf(hkey_handle, &status, "WLSW", "qd")) {
2439 tp_features.hotkey_wlsw = 1;
2440 printk(TPACPI_INFO
2441 "radio switch found; radios are %s\n",
2442 enabled(status, 0));
2443 }
2444 if (tp_features.hotkey_wlsw)
2445 res = add_to_attr_set(hotkey_dev_attributes,
2446 &dev_attr_hotkey_radio_sw.attr);
2447
2448 /* For X41t, X60t, X61t Tablets... */
2449 if (!res && acpi_evalf(hkey_handle, &status, "MHKG", "qd")) {
2450 tp_features.hotkey_tablet = 1;
2451 printk(TPACPI_INFO
2452 "possible tablet mode switch found; "
2453 "ThinkPad in %s mode\n",
2454 (status & TP_HOTKEY_TABLET_MASK)?
2455 "tablet" : "laptop");
2456 res = add_to_attr_set(hotkey_dev_attributes,
2457 &dev_attr_hotkey_tablet_mode.attr);
2458 }
2459
2460 if (!res)
2461 res = register_attr_set_with_sysfs(
2462 hotkey_dev_attributes,
2463 &tpacpi_pdev->dev.kobj);
2464 if (res)
2465 goto err_exit;
2466
2467 /* Set up key map */
2468
2469 hotkey_keycode_map = kmalloc(TPACPI_HOTKEY_MAP_SIZE,
2470 GFP_KERNEL);
2471 if (!hotkey_keycode_map) {
2472 printk(TPACPI_ERR
2473 "failed to allocate memory for key map\n");
2474 res = -ENOMEM;
2475 goto err_exit;
2476 }
2477
2478 if (thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO) {
2479 dbg_printk(TPACPI_DBG_INIT,
2480 "using Lenovo default hot key map\n");
2481 memcpy(hotkey_keycode_map, &lenovo_keycode_map,
2482 TPACPI_HOTKEY_MAP_SIZE);
2483 } else {
2484 dbg_printk(TPACPI_DBG_INIT,
2485 "using IBM default hot key map\n");
2486 memcpy(hotkey_keycode_map, &ibm_keycode_map,
2487 TPACPI_HOTKEY_MAP_SIZE);
2488 }
2489
2490 set_bit(EV_KEY, tpacpi_inputdev->evbit);
2491 set_bit(EV_MSC, tpacpi_inputdev->evbit);
2492 set_bit(MSC_SCAN, tpacpi_inputdev->mscbit);
2493 tpacpi_inputdev->keycodesize = TPACPI_HOTKEY_MAP_TYPESIZE;
2494 tpacpi_inputdev->keycodemax = TPACPI_HOTKEY_MAP_LEN;
2495 tpacpi_inputdev->keycode = hotkey_keycode_map;
2496 for (i = 0; i < TPACPI_HOTKEY_MAP_LEN; i++) {
2497 if (hotkey_keycode_map[i] != KEY_RESERVED) {
2498 set_bit(hotkey_keycode_map[i],
2499 tpacpi_inputdev->keybit);
2500 } else {
2501 if (i < sizeof(hotkey_reserved_mask)*8)
2502 hotkey_reserved_mask |= 1 << i;
2503 }
2504 }
2505
2506 if (tp_features.hotkey_wlsw) {
2507 set_bit(EV_SW, tpacpi_inputdev->evbit);
2508 set_bit(SW_RFKILL_ALL, tpacpi_inputdev->swbit);
2509 }
2510 if (tp_features.hotkey_tablet) {
2511 set_bit(EV_SW, tpacpi_inputdev->evbit);
2512 set_bit(SW_TABLET_MODE, tpacpi_inputdev->swbit);
2513 }
2514
2515 /* Do not issue duplicate brightness change events to
2516 * userspace */
2517 if (!tp_features.bright_acpimode)
2518 /* update bright_acpimode... */
2519 tpacpi_check_std_acpi_brightness_support();
2520
2521 if (tp_features.bright_acpimode) {
2522 printk(TPACPI_INFO
2523 "This ThinkPad has standard ACPI backlight "
2524 "brightness control, supported by the ACPI "
2525 "video driver\n");
2526 printk(TPACPI_NOTICE
2527 "Disabling thinkpad-acpi brightness events "
2528 "by default...\n");
2529
2530 /* The hotkey_reserved_mask change below is not
2531 * necessary while the keys are at KEY_RESERVED in the
2532 * default map, but better safe than sorry, leave it
2533 * here as a marker of what we have to do, especially
2534 * when we finally become able to set this at runtime
2535 * on response to X.org requests */
2536 hotkey_reserved_mask |=
2537 (1 << TP_ACPI_HOTKEYSCAN_FNHOME)
2538 | (1 << TP_ACPI_HOTKEYSCAN_FNEND);
2539 }
2540
2541 dbg_printk(TPACPI_DBG_INIT, "enabling hot key handling\n");
2542 res = hotkey_status_set(1);
2543 if (res) {
2544 hotkey_exit();
2545 return res;
2546 }
2547 res = hotkey_mask_set(((hotkey_all_mask | hotkey_source_mask)
2548 & ~hotkey_reserved_mask)
2549 | hotkey_orig_mask);
2550 if (res < 0 && res != -ENXIO) {
2551 hotkey_exit();
2552 return res;
2553 }
2554
2555 dbg_printk(TPACPI_DBG_INIT,
2556 "legacy hot key reporting over procfs %s\n",
2557 (hotkey_report_mode < 2) ?
2558 "enabled" : "disabled");
2559
2560 tpacpi_inputdev->open = &hotkey_inputdev_open;
2561 tpacpi_inputdev->close = &hotkey_inputdev_close;
2562
2563 hotkey_poll_setup_safe(1);
2564 tpacpi_send_radiosw_update();
2565 tpacpi_input_send_tabletsw();
2566
2567 return 0;
2568
2569 err_exit:
2570 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
2571 hotkey_dev_attributes = NULL;
2572
2573 return (res < 0)? res : 1;
2574 }
2575
2576 static bool hotkey_notify_hotkey(const u32 hkey,
2577 bool *send_acpi_ev,
2578 bool *ignore_acpi_ev)
2579 {
2580 /* 0x1000-0x1FFF: key presses */
2581 unsigned int scancode = hkey & 0xfff;
2582 *send_acpi_ev = true;
2583 *ignore_acpi_ev = false;
2584
2585 if (scancode > 0 && scancode < 0x21) {
2586 scancode--;
2587 if (!(hotkey_source_mask & (1 << scancode))) {
2588 tpacpi_input_send_key(scancode);
2589 *send_acpi_ev = false;
2590 } else {
2591 *ignore_acpi_ev = true;
2592 }
2593 return true;
2594 }
2595 return false;
2596 }
2597
2598 static bool hotkey_notify_wakeup(const u32 hkey,
2599 bool *send_acpi_ev,
2600 bool *ignore_acpi_ev)
2601 {
2602 /* 0x2000-0x2FFF: Wakeup reason */
2603 *send_acpi_ev = true;
2604 *ignore_acpi_ev = false;
2605
2606 switch (hkey) {
2607 case 0x2304: /* suspend, undock */
2608 case 0x2404: /* hibernation, undock */
2609 hotkey_wakeup_reason = TP_ACPI_WAKEUP_UNDOCK;
2610 *ignore_acpi_ev = true;
2611 break;
2612
2613 case 0x2305: /* suspend, bay eject */
2614 case 0x2405: /* hibernation, bay eject */
2615 hotkey_wakeup_reason = TP_ACPI_WAKEUP_BAYEJ;
2616 *ignore_acpi_ev = true;
2617 break;
2618
2619 case 0x2313: /* Battery on critical low level (S3) */
2620 case 0x2413: /* Battery on critical low level (S4) */
2621 printk(TPACPI_ALERT
2622 "EMERGENCY WAKEUP: battery almost empty\n");
2623 /* how to auto-heal: */
2624 /* 2313: woke up from S3, go to S4/S5 */
2625 /* 2413: woke up from S4, go to S5 */
2626 break;
2627
2628 default:
2629 return false;
2630 }
2631
2632 if (hotkey_wakeup_reason != TP_ACPI_WAKEUP_NONE) {
2633 printk(TPACPI_INFO
2634 "woke up due to a hot-unplug "
2635 "request...\n");
2636 hotkey_wakeup_reason_notify_change();
2637 }
2638 return true;
2639 }
2640
2641 static bool hotkey_notify_usrevent(const u32 hkey,
2642 bool *send_acpi_ev,
2643 bool *ignore_acpi_ev)
2644 {
2645 /* 0x5000-0x5FFF: human interface helpers */
2646 *send_acpi_ev = true;
2647 *ignore_acpi_ev = false;
2648
2649 switch (hkey) {
2650 case 0x5010: /* Lenovo new BIOS: brightness changed */
2651 case 0x500b: /* X61t: tablet pen inserted into bay */
2652 case 0x500c: /* X61t: tablet pen removed from bay */
2653 return true;
2654
2655 case 0x5009: /* X41t-X61t: swivel up (tablet mode) */
2656 case 0x500a: /* X41t-X61t: swivel down (normal mode) */
2657 tpacpi_input_send_tabletsw();
2658 hotkey_tablet_mode_notify_change();
2659 *send_acpi_ev = false;
2660 return true;
2661
2662 case 0x5001:
2663 case 0x5002:
2664 /* LID switch events. Do not propagate */
2665 *ignore_acpi_ev = true;
2666 return true;
2667
2668 default:
2669 return false;
2670 }
2671 }
2672
2673 static bool hotkey_notify_thermal(const u32 hkey,
2674 bool *send_acpi_ev,
2675 bool *ignore_acpi_ev)
2676 {
2677 /* 0x6000-0x6FFF: thermal alarms */
2678 *send_acpi_ev = true;
2679 *ignore_acpi_ev = false;
2680
2681 switch (hkey) {
2682 case 0x6011:
2683 printk(TPACPI_CRIT
2684 "THERMAL ALARM: battery is too hot!\n");
2685 /* recommended action: warn user through gui */
2686 return true;
2687 case 0x6012:
2688 printk(TPACPI_ALERT
2689 "THERMAL EMERGENCY: battery is extremely hot!\n");
2690 /* recommended action: immediate sleep/hibernate */
2691 return true;
2692 case 0x6021:
2693 printk(TPACPI_CRIT
2694 "THERMAL ALARM: "
2695 "a sensor reports something is too hot!\n");
2696 /* recommended action: warn user through gui, that */
2697 /* some internal component is too hot */
2698 return true;
2699 case 0x6022:
2700 printk(TPACPI_ALERT
2701 "THERMAL EMERGENCY: "
2702 "a sensor reports something is extremely hot!\n");
2703 /* recommended action: immediate sleep/hibernate */
2704 return true;
2705 case 0x6030:
2706 printk(TPACPI_INFO
2707 "EC reports that Thermal Table has changed\n");
2708 /* recommended action: do nothing, we don't have
2709 * Lenovo ATM information */
2710 return true;
2711 default:
2712 printk(TPACPI_ALERT
2713 "THERMAL ALERT: unknown thermal alarm received\n");
2714 return false;
2715 }
2716 }
2717
2718 static void hotkey_notify(struct ibm_struct *ibm, u32 event)
2719 {
2720 u32 hkey;
2721 bool send_acpi_ev;
2722 bool ignore_acpi_ev;
2723 bool known_ev;
2724
2725 if (event != 0x80) {
2726 printk(TPACPI_ERR
2727 "unknown HKEY notification event %d\n", event);
2728 /* forward it to userspace, maybe it knows how to handle it */
2729 acpi_bus_generate_netlink_event(
2730 ibm->acpi->device->pnp.device_class,
2731 dev_name(&ibm->acpi->device->dev),
2732 event, 0);
2733 return;
2734 }
2735
2736 while (1) {
2737 if (!acpi_evalf(hkey_handle, &hkey, "MHKP", "d")) {
2738 printk(TPACPI_ERR "failed to retrieve HKEY event\n");
2739 return;
2740 }
2741
2742 if (hkey == 0) {
2743 /* queue empty */
2744 return;
2745 }
2746
2747 send_acpi_ev = true;
2748 ignore_acpi_ev = false;
2749
2750 switch (hkey >> 12) {
2751 case 1:
2752 /* 0x1000-0x1FFF: key presses */
2753 known_ev = hotkey_notify_hotkey(hkey, &send_acpi_ev,
2754 &ignore_acpi_ev);
2755 break;
2756 case 2:
2757 /* 0x2000-0x2FFF: Wakeup reason */
2758 known_ev = hotkey_notify_wakeup(hkey, &send_acpi_ev,
2759 &ignore_acpi_ev);
2760 break;
2761 case 3:
2762 /* 0x3000-0x3FFF: bay-related wakeups */
2763 if (hkey == 0x3003) {
2764 hotkey_autosleep_ack = 1;
2765 printk(TPACPI_INFO
2766 "bay ejected\n");
2767 hotkey_wakeup_hotunplug_complete_notify_change();
2768 known_ev = true;
2769 } else {
2770 known_ev = false;
2771 }
2772 break;
2773 case 4:
2774 /* 0x4000-0x4FFF: dock-related wakeups */
2775 if (hkey == 0x4003) {
2776 hotkey_autosleep_ack = 1;
2777 printk(TPACPI_INFO
2778 "undocked\n");
2779 hotkey_wakeup_hotunplug_complete_notify_change();
2780 known_ev = true;
2781 } else {
2782 known_ev = false;
2783 }
2784 break;
2785 case 5:
2786 /* 0x5000-0x5FFF: human interface helpers */
2787 known_ev = hotkey_notify_usrevent(hkey, &send_acpi_ev,
2788 &ignore_acpi_ev);
2789 break;
2790 case 6:
2791 /* 0x6000-0x6FFF: thermal alarms */
2792 known_ev = hotkey_notify_thermal(hkey, &send_acpi_ev,
2793 &ignore_acpi_ev);
2794 break;
2795 case 7:
2796 /* 0x7000-0x7FFF: misc */
2797 if (tp_features.hotkey_wlsw && hkey == 0x7000) {
2798 tpacpi_send_radiosw_update();
2799 send_acpi_ev = 0;
2800 known_ev = true;
2801 break;
2802 }
2803 /* fallthrough to default */
2804 default:
2805 known_ev = false;
2806 }
2807 if (!known_ev) {
2808 printk(TPACPI_NOTICE
2809 "unhandled HKEY event 0x%04x\n", hkey);
2810 printk(TPACPI_NOTICE
2811 "please report the conditions when this "
2812 "event happened to %s\n", TPACPI_MAIL);
2813 }
2814
2815 /* Legacy events */
2816 if (!ignore_acpi_ev &&
2817 (send_acpi_ev || hotkey_report_mode < 2)) {
2818 acpi_bus_generate_proc_event(ibm->acpi->device,
2819 event, hkey);
2820 }
2821
2822 /* netlink events */
2823 if (!ignore_acpi_ev && send_acpi_ev) {
2824 acpi_bus_generate_netlink_event(
2825 ibm->acpi->device->pnp.device_class,
2826 dev_name(&ibm->acpi->device->dev),
2827 event, hkey);
2828 }
2829 }
2830 }
2831
2832 static void hotkey_suspend(pm_message_t state)
2833 {
2834 /* Do these on suspend, we get the events on early resume! */
2835 hotkey_wakeup_reason = TP_ACPI_WAKEUP_NONE;
2836 hotkey_autosleep_ack = 0;
2837 }
2838
2839 static void hotkey_resume(void)
2840 {
2841 tpacpi_disable_brightness_delay();
2842
2843 if (hotkey_mask_get())
2844 printk(TPACPI_ERR
2845 "error while trying to read hot key mask "
2846 "from firmware\n");
2847 tpacpi_send_radiosw_update();
2848 hotkey_tablet_mode_notify_change();
2849 hotkey_wakeup_reason_notify_change();
2850 hotkey_wakeup_hotunplug_complete_notify_change();
2851 hotkey_poll_setup_safe(0);
2852 }
2853
2854 /* procfs -------------------------------------------------------------- */
2855 static int hotkey_read(char *p)
2856 {
2857 int res, status;
2858 int len = 0;
2859
2860 if (!tp_features.hotkey) {
2861 len += sprintf(p + len, "status:\t\tnot supported\n");
2862 return len;
2863 }
2864
2865 if (mutex_lock_killable(&hotkey_mutex))
2866 return -ERESTARTSYS;
2867 res = hotkey_status_get(&status);
2868 if (!res)
2869 res = hotkey_mask_get();
2870 mutex_unlock(&hotkey_mutex);
2871 if (res)
2872 return res;
2873
2874 len += sprintf(p + len, "status:\t\t%s\n", enabled(status, 0));
2875 if (tp_features.hotkey_mask) {
2876 len += sprintf(p + len, "mask:\t\t0x%08x\n", hotkey_mask);
2877 len += sprintf(p + len,
2878 "commands:\tenable, disable, reset, <mask>\n");
2879 } else {
2880 len += sprintf(p + len, "mask:\t\tnot supported\n");
2881 len += sprintf(p + len, "commands:\tenable, disable, reset\n");
2882 }
2883
2884 return len;
2885 }
2886
2887 static int hotkey_write(char *buf)
2888 {
2889 int res, status;
2890 u32 mask;
2891 char *cmd;
2892
2893 if (!tp_features.hotkey)
2894 return -ENODEV;
2895
2896 if (mutex_lock_killable(&hotkey_mutex))
2897 return -ERESTARTSYS;
2898
2899 status = -1;
2900 mask = hotkey_mask;
2901
2902 res = 0;
2903 while ((cmd = next_cmd(&buf))) {
2904 if (strlencmp(cmd, "enable") == 0) {
2905 status = 1;
2906 } else if (strlencmp(cmd, "disable") == 0) {
2907 status = 0;
2908 } else if (strlencmp(cmd, "reset") == 0) {
2909 status = hotkey_orig_status;
2910 mask = hotkey_orig_mask;
2911 } else if (sscanf(cmd, "0x%x", &mask) == 1) {
2912 /* mask set */
2913 } else if (sscanf(cmd, "%x", &mask) == 1) {
2914 /* mask set */
2915 } else {
2916 res = -EINVAL;
2917 goto errexit;
2918 }
2919 }
2920 if (status != -1)
2921 res = hotkey_status_set(status);
2922
2923 if (!res && mask != hotkey_mask)
2924 res = hotkey_mask_set(mask);
2925
2926 errexit:
2927 mutex_unlock(&hotkey_mutex);
2928 return res;
2929 }
2930
2931 static const struct acpi_device_id ibm_htk_device_ids[] = {
2932 {TPACPI_ACPI_HKEY_HID, 0},
2933 {"", 0},
2934 };
2935
2936 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver = {
2937 .hid = ibm_htk_device_ids,
2938 .notify = hotkey_notify,
2939 .handle = &hkey_handle,
2940 .type = ACPI_DEVICE_NOTIFY,
2941 };
2942
2943 static struct ibm_struct hotkey_driver_data = {
2944 .name = "hotkey",
2945 .read = hotkey_read,
2946 .write = hotkey_write,
2947 .exit = hotkey_exit,
2948 .resume = hotkey_resume,
2949 .suspend = hotkey_suspend,
2950 .acpi = &ibm_hotkey_acpidriver,
2951 };
2952
2953 /*************************************************************************
2954 * Bluetooth subdriver
2955 */
2956
2957 enum {
2958 /* ACPI GBDC/SBDC bits */
2959 TP_ACPI_BLUETOOTH_HWPRESENT = 0x01, /* Bluetooth hw available */
2960 TP_ACPI_BLUETOOTH_RADIOSSW = 0x02, /* Bluetooth radio enabled */
2961 TP_ACPI_BLUETOOTH_RESUMECTRL = 0x04, /* Bluetooth state at resume:
2962 off / last state */
2963 };
2964
2965 enum {
2966 /* ACPI \BLTH commands */
2967 TP_ACPI_BLTH_GET_ULTRAPORT_ID = 0x00, /* Get Ultraport BT ID */
2968 TP_ACPI_BLTH_GET_PWR_ON_RESUME = 0x01, /* Get power-on-resume state */
2969 TP_ACPI_BLTH_PWR_ON_ON_RESUME = 0x02, /* Resume powered on */
2970 TP_ACPI_BLTH_PWR_OFF_ON_RESUME = 0x03, /* Resume powered off */
2971 TP_ACPI_BLTH_SAVE_STATE = 0x05, /* Save state for S4/S5 */
2972 };
2973
2974 static struct rfkill *tpacpi_bluetooth_rfkill;
2975
2976 static void bluetooth_suspend(pm_message_t state)
2977 {
2978 /* Try to make sure radio will resume powered off */
2979 acpi_evalf(NULL, NULL, "\\BLTH", "vd",
2980 TP_ACPI_BLTH_PWR_OFF_ON_RESUME);
2981 }
2982
2983 static int bluetooth_get_radiosw(void)
2984 {
2985 int status;
2986
2987 if (!tp_features.bluetooth)
2988 return -ENODEV;
2989
2990 /* WLSW overrides bluetooth in firmware/hardware, reflect that */
2991 if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&status) && !status)
2992 return RFKILL_STATE_HARD_BLOCKED;
2993
2994 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
2995 if (dbg_bluetoothemul)
2996 return (tpacpi_bluetooth_emulstate) ?
2997 RFKILL_STATE_UNBLOCKED : RFKILL_STATE_SOFT_BLOCKED;
2998 #endif
2999
3000 if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
3001 return -EIO;
3002
3003 return ((status & TP_ACPI_BLUETOOTH_RADIOSSW) != 0) ?
3004 RFKILL_STATE_UNBLOCKED : RFKILL_STATE_SOFT_BLOCKED;
3005 }
3006
3007 static void bluetooth_update_rfk(void)
3008 {
3009 int status;
3010
3011 if (!tpacpi_bluetooth_rfkill)
3012 return;
3013
3014 status = bluetooth_get_radiosw();
3015 if (status < 0)
3016 return;
3017 rfkill_force_state(tpacpi_bluetooth_rfkill, status);
3018 }
3019
3020 static int bluetooth_set_radiosw(int radio_on, int update_rfk)
3021 {
3022 int status;
3023
3024 if (!tp_features.bluetooth)
3025 return -ENODEV;
3026
3027 /* WLSW overrides bluetooth in firmware/hardware, but there is no
3028 * reason to risk weird behaviour. */
3029 if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&status) && !status
3030 && radio_on)
3031 return -EPERM;
3032
3033 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3034 if (dbg_bluetoothemul) {
3035 tpacpi_bluetooth_emulstate = !!radio_on;
3036 if (update_rfk)
3037 bluetooth_update_rfk();
3038 return 0;
3039 }
3040 #endif
3041
3042 /* We make sure to keep TP_ACPI_BLUETOOTH_RESUMECTRL off */
3043 if (radio_on)
3044 status = TP_ACPI_BLUETOOTH_RADIOSSW;
3045 else
3046 status = 0;
3047 if (!acpi_evalf(hkey_handle, NULL, "SBDC", "vd", status))
3048 return -EIO;
3049
3050 if (update_rfk)
3051 bluetooth_update_rfk();
3052
3053 return 0;
3054 }
3055
3056 /* sysfs bluetooth enable ---------------------------------------------- */
3057 static ssize_t bluetooth_enable_show(struct device *dev,
3058 struct device_attribute *attr,
3059 char *buf)
3060 {
3061 int status;
3062
3063 status = bluetooth_get_radiosw();
3064 if (status < 0)
3065 return status;
3066
3067 return snprintf(buf, PAGE_SIZE, "%d\n",
3068 (status == RFKILL_STATE_UNBLOCKED) ? 1 : 0);
3069 }
3070
3071 static ssize_t bluetooth_enable_store(struct device *dev,
3072 struct device_attribute *attr,
3073 const char *buf, size_t count)
3074 {
3075 unsigned long t;
3076 int res;
3077
3078 if (parse_strtoul(buf, 1, &t))
3079 return -EINVAL;
3080
3081 res = bluetooth_set_radiosw(t, 1);
3082
3083 return (res) ? res : count;
3084 }
3085
3086 static struct device_attribute dev_attr_bluetooth_enable =
3087 __ATTR(bluetooth_enable, S_IWUSR | S_IRUGO,
3088 bluetooth_enable_show, bluetooth_enable_store);
3089
3090 /* --------------------------------------------------------------------- */
3091
3092 static struct attribute *bluetooth_attributes[] = {
3093 &dev_attr_bluetooth_enable.attr,
3094 NULL
3095 };
3096
3097 static const struct attribute_group bluetooth_attr_group = {
3098 .attrs = bluetooth_attributes,
3099 };
3100
3101 static int tpacpi_bluetooth_rfk_get(void *data, enum rfkill_state *state)
3102 {
3103 int bts = bluetooth_get_radiosw();
3104
3105 if (bts < 0)
3106 return bts;
3107
3108 *state = bts;
3109 return 0;
3110 }
3111
3112 static int tpacpi_bluetooth_rfk_set(void *data, enum rfkill_state state)
3113 {
3114 return bluetooth_set_radiosw((state == RFKILL_STATE_UNBLOCKED), 0);
3115 }
3116
3117 static void bluetooth_shutdown(void)
3118 {
3119 /* Order firmware to save current state to NVRAM */
3120 if (!acpi_evalf(NULL, NULL, "\\BLTH", "vd",
3121 TP_ACPI_BLTH_SAVE_STATE))
3122 printk(TPACPI_NOTICE
3123 "failed to save bluetooth state to NVRAM\n");
3124 }
3125
3126 static void bluetooth_exit(void)
3127 {
3128 bluetooth_shutdown();
3129
3130 if (tpacpi_bluetooth_rfkill)
3131 rfkill_unregister(tpacpi_bluetooth_rfkill);
3132
3133 sysfs_remove_group(&tpacpi_pdev->dev.kobj,
3134 &bluetooth_attr_group);
3135 }
3136
3137 static int __init bluetooth_init(struct ibm_init_struct *iibm)
3138 {
3139 int res;
3140 int status = 0;
3141
3142 vdbg_printk(TPACPI_DBG_INIT, "initializing bluetooth subdriver\n");
3143
3144 TPACPI_ACPIHANDLE_INIT(hkey);
3145
3146 /* bluetooth not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
3147 G4x, R30, R31, R40e, R50e, T20-22, X20-21 */
3148 tp_features.bluetooth = hkey_handle &&
3149 acpi_evalf(hkey_handle, &status, "GBDC", "qd");
3150
3151 vdbg_printk(TPACPI_DBG_INIT, "bluetooth is %s, status 0x%02x\n",
3152 str_supported(tp_features.bluetooth),
3153 status);
3154
3155 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3156 if (dbg_bluetoothemul) {
3157 tp_features.bluetooth = 1;
3158 printk(TPACPI_INFO
3159 "bluetooth switch emulation enabled\n");
3160 } else
3161 #endif
3162 if (tp_features.bluetooth &&
3163 !(status & TP_ACPI_BLUETOOTH_HWPRESENT)) {
3164 /* no bluetooth hardware present in system */
3165 tp_features.bluetooth = 0;
3166 dbg_printk(TPACPI_DBG_INIT,
3167 "bluetooth hardware not installed\n");
3168 }
3169
3170 if (!tp_features.bluetooth)
3171 return 1;
3172
3173 res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
3174 &bluetooth_attr_group);
3175 if (res)
3176 return res;
3177
3178 res = tpacpi_new_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID,
3179 &tpacpi_bluetooth_rfkill,
3180 RFKILL_TYPE_BLUETOOTH,
3181 "tpacpi_bluetooth_sw",
3182 true,
3183 tpacpi_bluetooth_rfk_set,
3184 tpacpi_bluetooth_rfk_get);
3185 if (res) {
3186 bluetooth_exit();
3187 return res;
3188 }
3189
3190 return 0;
3191 }
3192
3193 /* procfs -------------------------------------------------------------- */
3194 static int bluetooth_read(char *p)
3195 {
3196 int len = 0;
3197 int status = bluetooth_get_radiosw();
3198
3199 if (!tp_features.bluetooth)
3200 len += sprintf(p + len, "status:\t\tnot supported\n");
3201 else {
3202 len += sprintf(p + len, "status:\t\t%s\n",
3203 (status == RFKILL_STATE_UNBLOCKED) ?
3204 "enabled" : "disabled");
3205 len += sprintf(p + len, "commands:\tenable, disable\n");
3206 }
3207
3208 return len;
3209 }
3210
3211 static int bluetooth_write(char *buf)
3212 {
3213 char *cmd;
3214
3215 if (!tp_features.bluetooth)
3216 return -ENODEV;
3217
3218 while ((cmd = next_cmd(&buf))) {
3219 if (strlencmp(cmd, "enable") == 0) {
3220 bluetooth_set_radiosw(1, 1);
3221 } else if (strlencmp(cmd, "disable") == 0) {
3222 bluetooth_set_radiosw(0, 1);
3223 } else
3224 return -EINVAL;
3225 }
3226
3227 return 0;
3228 }
3229
3230 static struct ibm_struct bluetooth_driver_data = {
3231 .name = "bluetooth",
3232 .read = bluetooth_read,
3233 .write = bluetooth_write,
3234 .exit = bluetooth_exit,
3235 .suspend = bluetooth_suspend,
3236 .shutdown = bluetooth_shutdown,
3237 };
3238
3239 /*************************************************************************
3240 * Wan subdriver
3241 */
3242
3243 enum {
3244 /* ACPI GWAN/SWAN bits */
3245 TP_ACPI_WANCARD_HWPRESENT = 0x01, /* Wan hw available */
3246 TP_ACPI_WANCARD_RADIOSSW = 0x02, /* Wan radio enabled */
3247 TP_ACPI_WANCARD_RESUMECTRL = 0x04, /* Wan state at resume:
3248 off / last state */
3249 };
3250
3251 static struct rfkill *tpacpi_wan_rfkill;
3252
3253 static void wan_suspend(pm_message_t state)
3254 {
3255 /* Try to make sure radio will resume powered off */
3256 acpi_evalf(NULL, NULL, "\\WGSV", "qvd",
3257 TP_ACPI_WGSV_PWR_OFF_ON_RESUME);
3258 }
3259
3260 static int wan_get_radiosw(void)
3261 {
3262 int status;
3263
3264 if (!tp_features.wan)
3265 return -ENODEV;
3266
3267 /* WLSW overrides WWAN in firmware/hardware, reflect that */
3268 if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&status) && !status)
3269 return RFKILL_STATE_HARD_BLOCKED;
3270
3271 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3272 if (dbg_wwanemul)
3273 return (tpacpi_wwan_emulstate) ?
3274 RFKILL_STATE_UNBLOCKED : RFKILL_STATE_SOFT_BLOCKED;
3275 #endif
3276
3277 if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
3278 return -EIO;
3279
3280 return ((status & TP_ACPI_WANCARD_RADIOSSW) != 0) ?
3281 RFKILL_STATE_UNBLOCKED : RFKILL_STATE_SOFT_BLOCKED;
3282 }
3283
3284 static void wan_update_rfk(void)
3285 {
3286 int status;
3287
3288 if (!tpacpi_wan_rfkill)
3289 return;
3290
3291 status = wan_get_radiosw();
3292 if (status < 0)
3293 return;
3294 rfkill_force_state(tpacpi_wan_rfkill, status);
3295 }
3296
3297 static int wan_set_radiosw(int radio_on, int update_rfk)
3298 {
3299 int status;
3300
3301 if (!tp_features.wan)
3302 return -ENODEV;
3303
3304 /* WLSW overrides bluetooth in firmware/hardware, but there is no
3305 * reason to risk weird behaviour. */
3306 if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&status) && !status
3307 && radio_on)
3308 return -EPERM;
3309
3310 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3311 if (dbg_wwanemul) {
3312 tpacpi_wwan_emulstate = !!radio_on;
3313 if (update_rfk)
3314 wan_update_rfk();
3315 return 0;
3316 }
3317 #endif
3318
3319 /* We make sure to keep TP_ACPI_WANCARD_RESUMECTRL off */
3320 if (radio_on)
3321 status = TP_ACPI_WANCARD_RADIOSSW;
3322 else
3323 status = 0;
3324 if (!acpi_evalf(hkey_handle, NULL, "SWAN", "vd", status))
3325 return -EIO;
3326
3327 if (update_rfk)
3328 wan_update_rfk();
3329
3330 return 0;
3331 }
3332
3333 /* sysfs wan enable ---------------------------------------------------- */
3334 static ssize_t wan_enable_show(struct device *dev,
3335 struct device_attribute *attr,
3336 char *buf)
3337 {
3338 int status;
3339
3340 status = wan_get_radiosw();
3341 if (status < 0)
3342 return status;
3343
3344 return snprintf(buf, PAGE_SIZE, "%d\n",
3345 (status == RFKILL_STATE_UNBLOCKED) ? 1 : 0);
3346 }
3347
3348 static ssize_t wan_enable_store(struct device *dev,
3349 struct device_attribute *attr,
3350 const char *buf, size_t count)
3351 {
3352 unsigned long t;
3353 int res;
3354
3355 if (parse_strtoul(buf, 1, &t))
3356 return -EINVAL;
3357
3358 res = wan_set_radiosw(t, 1);
3359
3360 return (res) ? res : count;
3361 }
3362
3363 static struct device_attribute dev_attr_wan_enable =
3364 __ATTR(wwan_enable, S_IWUSR | S_IRUGO,
3365 wan_enable_show, wan_enable_store);
3366
3367 /* --------------------------------------------------------------------- */
3368
3369 static struct attribute *wan_attributes[] = {
3370 &dev_attr_wan_enable.attr,
3371 NULL
3372 };
3373
3374 static const struct attribute_group wan_attr_group = {
3375 .attrs = wan_attributes,
3376 };
3377
3378 static int tpacpi_wan_rfk_get(void *data, enum rfkill_state *state)
3379 {
3380 int wans = wan_get_radiosw();
3381
3382 if (wans < 0)
3383 return wans;
3384
3385 *state = wans;
3386 return 0;
3387 }
3388
3389 static int tpacpi_wan_rfk_set(void *data, enum rfkill_state state)
3390 {
3391 return wan_set_radiosw((state == RFKILL_STATE_UNBLOCKED), 0);
3392 }
3393
3394 static void wan_shutdown(void)
3395 {
3396 /* Order firmware to save current state to NVRAM */
3397 if (!acpi_evalf(NULL, NULL, "\\WGSV", "vd",
3398 TP_ACPI_WGSV_SAVE_STATE))
3399 printk(TPACPI_NOTICE
3400 "failed to save WWAN state to NVRAM\n");
3401 }
3402
3403 static void wan_exit(void)
3404 {
3405 wan_shutdown();
3406
3407 if (tpacpi_wan_rfkill)
3408 rfkill_unregister(tpacpi_wan_rfkill);
3409
3410 sysfs_remove_group(&tpacpi_pdev->dev.kobj,
3411 &wan_attr_group);
3412 }
3413
3414 static int __init wan_init(struct ibm_init_struct *iibm)
3415 {
3416 int res;
3417 int status = 0;
3418
3419 vdbg_printk(TPACPI_DBG_INIT, "initializing wan subdriver\n");
3420
3421 TPACPI_ACPIHANDLE_INIT(hkey);
3422
3423 tp_features.wan = hkey_handle &&
3424 acpi_evalf(hkey_handle, &status, "GWAN", "qd");
3425
3426 vdbg_printk(TPACPI_DBG_INIT, "wan is %s, status 0x%02x\n",
3427 str_supported(tp_features.wan),
3428 status);
3429
3430 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3431 if (dbg_wwanemul) {
3432 tp_features.wan = 1;
3433 printk(TPACPI_INFO
3434 "wwan switch emulation enabled\n");
3435 } else
3436 #endif
3437 if (tp_features.wan &&
3438 !(status & TP_ACPI_WANCARD_HWPRESENT)) {
3439 /* no wan hardware present in system */
3440 tp_features.wan = 0;
3441 dbg_printk(TPACPI_DBG_INIT,
3442 "wan hardware not installed\n");
3443 }
3444
3445 if (!tp_features.wan)
3446 return 1;
3447
3448 res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
3449 &wan_attr_group);
3450 if (res)
3451 return res;
3452
3453 res = tpacpi_new_rfkill(TPACPI_RFK_WWAN_SW_ID,
3454 &tpacpi_wan_rfkill,
3455 RFKILL_TYPE_WWAN,
3456 "tpacpi_wwan_sw",
3457 true,
3458 tpacpi_wan_rfk_set,
3459 tpacpi_wan_rfk_get);
3460 if (res) {
3461 wan_exit();
3462 return res;
3463 }
3464
3465 return 0;
3466 }
3467
3468 /* procfs -------------------------------------------------------------- */
3469 static int wan_read(char *p)
3470 {
3471 int len = 0;
3472 int status = wan_get_radiosw();
3473
3474 if (!tp_features.wan)
3475 len += sprintf(p + len, "status:\t\tnot supported\n");
3476 else {
3477 len += sprintf(p + len, "status:\t\t%s\n",
3478 (status == RFKILL_STATE_UNBLOCKED) ?
3479 "enabled" : "disabled");
3480 len += sprintf(p + len, "commands:\tenable, disable\n");
3481 }
3482
3483 return len;
3484 }
3485
3486 static int wan_write(char *buf)
3487 {
3488 char *cmd;
3489
3490 if (!tp_features.wan)
3491 return -ENODEV;
3492
3493 while ((cmd = next_cmd(&buf))) {
3494 if (strlencmp(cmd, "enable") == 0) {
3495 wan_set_radiosw(1, 1);
3496 } else if (strlencmp(cmd, "disable") == 0) {
3497 wan_set_radiosw(0, 1);
3498 } else
3499 return -EINVAL;
3500 }
3501
3502 return 0;
3503 }
3504
3505 static struct ibm_struct wan_driver_data = {
3506 .name = "wan",
3507 .read = wan_read,
3508 .write = wan_write,
3509 .exit = wan_exit,
3510 .suspend = wan_suspend,
3511 .shutdown = wan_shutdown,
3512 };
3513
3514 /*************************************************************************
3515 * UWB subdriver
3516 */
3517
3518 enum {
3519 /* ACPI GUWB/SUWB bits */
3520 TP_ACPI_UWB_HWPRESENT = 0x01, /* UWB hw available */
3521 TP_ACPI_UWB_RADIOSSW = 0x02, /* UWB radio enabled */
3522 };
3523
3524 static struct rfkill *tpacpi_uwb_rfkill;
3525
3526 static int uwb_get_radiosw(void)
3527 {
3528 int status;
3529
3530 if (!tp_features.uwb)
3531 return -ENODEV;
3532
3533 /* WLSW overrides UWB in firmware/hardware, reflect that */
3534 if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&status) && !status)
3535 return RFKILL_STATE_HARD_BLOCKED;
3536
3537 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3538 if (dbg_uwbemul)
3539 return (tpacpi_uwb_emulstate) ?
3540 RFKILL_STATE_UNBLOCKED : RFKILL_STATE_SOFT_BLOCKED;
3541 #endif
3542
3543 if (!acpi_evalf(hkey_handle, &status, "GUWB", "d"))
3544 return -EIO;
3545
3546 return ((status & TP_ACPI_UWB_RADIOSSW) != 0) ?
3547 RFKILL_STATE_UNBLOCKED : RFKILL_STATE_SOFT_BLOCKED;
3548 }
3549
3550 static void uwb_update_rfk(void)
3551 {
3552 int status;
3553
3554 if (!tpacpi_uwb_rfkill)
3555 return;
3556
3557 status = uwb_get_radiosw();
3558 if (status < 0)
3559 return;
3560 rfkill_force_state(tpacpi_uwb_rfkill, status);
3561 }
3562
3563 static int uwb_set_radiosw(int radio_on, int update_rfk)
3564 {
3565 int status;
3566
3567 if (!tp_features.uwb)
3568 return -ENODEV;
3569
3570 /* WLSW overrides UWB in firmware/hardware, but there is no
3571 * reason to risk weird behaviour. */
3572 if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&status) && !status
3573 && radio_on)
3574 return -EPERM;
3575
3576 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3577 if (dbg_uwbemul) {
3578 tpacpi_uwb_emulstate = !!radio_on;
3579 if (update_rfk)
3580 uwb_update_rfk();
3581 return 0;
3582 }
3583 #endif
3584
3585 status = (radio_on) ? TP_ACPI_UWB_RADIOSSW : 0;
3586 if (!acpi_evalf(hkey_handle, NULL, "SUWB", "vd", status))
3587 return -EIO;
3588
3589 if (update_rfk)
3590 uwb_update_rfk();
3591
3592 return 0;
3593 }
3594
3595 /* --------------------------------------------------------------------- */
3596
3597 static int tpacpi_uwb_rfk_get(void *data, enum rfkill_state *state)
3598 {
3599 int uwbs = uwb_get_radiosw();
3600
3601 if (uwbs < 0)
3602 return uwbs;
3603
3604 *state = uwbs;
3605 return 0;
3606 }
3607
3608 static int tpacpi_uwb_rfk_set(void *data, enum rfkill_state state)
3609 {
3610 return uwb_set_radiosw((state == RFKILL_STATE_UNBLOCKED), 0);
3611 }
3612
3613 static void uwb_exit(void)
3614 {
3615 if (tpacpi_uwb_rfkill)
3616 rfkill_unregister(tpacpi_uwb_rfkill);
3617 }
3618
3619 static int __init uwb_init(struct ibm_init_struct *iibm)
3620 {
3621 int res;
3622 int status = 0;
3623
3624 vdbg_printk(TPACPI_DBG_INIT, "initializing uwb subdriver\n");
3625
3626 TPACPI_ACPIHANDLE_INIT(hkey);
3627
3628 tp_features.uwb = hkey_handle &&
3629 acpi_evalf(hkey_handle, &status, "GUWB", "qd");
3630
3631 vdbg_printk(TPACPI_DBG_INIT, "uwb is %s, status 0x%02x\n",
3632 str_supported(tp_features.uwb),
3633 status);
3634
3635 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3636 if (dbg_uwbemul) {
3637 tp_features.uwb = 1;
3638 printk(TPACPI_INFO
3639 "uwb switch emulation enabled\n");
3640 } else
3641 #endif
3642 if (tp_features.uwb &&
3643 !(status & TP_ACPI_UWB_HWPRESENT)) {
3644 /* no uwb hardware present in system */
3645 tp_features.uwb = 0;
3646 dbg_printk(TPACPI_DBG_INIT,
3647 "uwb hardware not installed\n");
3648 }
3649
3650 if (!tp_features.uwb)
3651 return 1;
3652
3653 res = tpacpi_new_rfkill(TPACPI_RFK_UWB_SW_ID,
3654 &tpacpi_uwb_rfkill,
3655 RFKILL_TYPE_UWB,
3656 "tpacpi_uwb_sw",
3657 false,
3658 tpacpi_uwb_rfk_set,
3659 tpacpi_uwb_rfk_get);
3660
3661 return res;
3662 }
3663
3664 static struct ibm_struct uwb_driver_data = {
3665 .name = "uwb",
3666 .exit = uwb_exit,
3667 .flags.experimental = 1,
3668 };
3669
3670 /*************************************************************************
3671 * Video subdriver
3672 */
3673
3674 #ifdef CONFIG_THINKPAD_ACPI_VIDEO
3675
3676 enum video_access_mode {
3677 TPACPI_VIDEO_NONE = 0,
3678 TPACPI_VIDEO_570, /* 570 */
3679 TPACPI_VIDEO_770, /* 600e/x, 770e, 770x */
3680 TPACPI_VIDEO_NEW, /* all others */
3681 };
3682
3683 enum { /* video status flags, based on VIDEO_570 */
3684 TP_ACPI_VIDEO_S_LCD = 0x01, /* LCD output enabled */
3685 TP_ACPI_VIDEO_S_CRT = 0x02, /* CRT output enabled */
3686 TP_ACPI_VIDEO_S_DVI = 0x08, /* DVI output enabled */
3687 };
3688
3689 enum { /* TPACPI_VIDEO_570 constants */
3690 TP_ACPI_VIDEO_570_PHSCMD = 0x87, /* unknown magic constant :( */
3691 TP_ACPI_VIDEO_570_PHSMASK = 0x03, /* PHS bits that map to
3692 * video_status_flags */
3693 TP_ACPI_VIDEO_570_PHS2CMD = 0x8b, /* unknown magic constant :( */
3694 TP_ACPI_VIDEO_570_PHS2SET = 0x80, /* unknown magic constant :( */
3695 };
3696
3697 static enum video_access_mode video_supported;
3698 static int video_orig_autosw;
3699
3700 static int video_autosw_get(void);
3701 static int video_autosw_set(int enable);
3702
3703 TPACPI_HANDLE(vid2, root, "\\_SB.PCI0.AGPB.VID"); /* G41 */
3704
3705 static int __init video_init(struct ibm_init_struct *iibm)
3706 {
3707 int ivga;
3708
3709 vdbg_printk(TPACPI_DBG_INIT, "initializing video subdriver\n");
3710
3711 TPACPI_ACPIHANDLE_INIT(vid);
3712 TPACPI_ACPIHANDLE_INIT(vid2);
3713
3714 if (vid2_handle && acpi_evalf(NULL, &ivga, "\\IVGA", "d") && ivga)
3715 /* G41, assume IVGA doesn't change */
3716 vid_handle = vid2_handle;
3717
3718 if (!vid_handle)
3719 /* video switching not supported on R30, R31 */
3720 video_supported = TPACPI_VIDEO_NONE;
3721 else if (acpi_evalf(vid_handle, &video_orig_autosw, "SWIT", "qd"))
3722 /* 570 */
3723 video_supported = TPACPI_VIDEO_570;
3724 else if (acpi_evalf(vid_handle, &video_orig_autosw, "^VADL", "qd"))
3725 /* 600e/x, 770e, 770x */
3726 video_supported = TPACPI_VIDEO_770;
3727 else
3728 /* all others */
3729 video_supported = TPACPI_VIDEO_NEW;
3730
3731 vdbg_printk(TPACPI_DBG_INIT, "video is %s, mode %d\n",
3732 str_supported(video_supported != TPACPI_VIDEO_NONE),
3733 video_supported);
3734
3735 return (video_supported != TPACPI_VIDEO_NONE)? 0 : 1;
3736 }
3737
3738 static void video_exit(void)
3739 {
3740 dbg_printk(TPACPI_DBG_EXIT,
3741 "restoring original video autoswitch mode\n");
3742 if (video_autosw_set(video_orig_autosw))
3743 printk(TPACPI_ERR "error while trying to restore original "
3744 "video autoswitch mode\n");
3745 }
3746
3747 static int video_outputsw_get(void)
3748 {
3749 int status = 0;
3750 int i;
3751
3752 switch (video_supported) {
3753 case TPACPI_VIDEO_570:
3754 if (!acpi_evalf(NULL, &i, "\\_SB.PHS", "dd",
3755 TP_ACPI_VIDEO_570_PHSCMD))
3756 return -EIO;
3757 status = i & TP_ACPI_VIDEO_570_PHSMASK;
3758 break;
3759 case TPACPI_VIDEO_770:
3760 if (!acpi_evalf(NULL, &i, "\\VCDL", "d"))
3761 return -EIO;
3762 if (i)
3763 status |= TP_ACPI_VIDEO_S_LCD;
3764 if (!acpi_evalf(NULL, &i, "\\VCDC", "d"))
3765 return -EIO;
3766 if (i)
3767 status |= TP_ACPI_VIDEO_S_CRT;
3768 break;
3769 case TPACPI_VIDEO_NEW:
3770 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 1) ||
3771 !acpi_evalf(NULL, &i, "\\VCDC", "d"))
3772 return -EIO;
3773 if (i)
3774 status |= TP_ACPI_VIDEO_S_CRT;
3775
3776 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0) ||
3777 !acpi_evalf(NULL, &i, "\\VCDL", "d"))
3778 return -EIO;
3779 if (i)
3780 status |= TP_ACPI_VIDEO_S_LCD;
3781 if (!acpi_evalf(NULL, &i, "\\VCDD", "d"))
3782 return -EIO;
3783 if (i)
3784 status |= TP_ACPI_VIDEO_S_DVI;
3785 break;
3786 default:
3787 return -ENOSYS;
3788 }
3789
3790 return status;
3791 }
3792
3793 static int video_outputsw_set(int status)
3794 {
3795 int autosw;
3796 int res = 0;
3797
3798 switch (video_supported) {
3799 case TPACPI_VIDEO_570:
3800 res = acpi_evalf(NULL, NULL,
3801 "\\_SB.PHS2", "vdd",
3802 TP_ACPI_VIDEO_570_PHS2CMD,
3803 status | TP_ACPI_VIDEO_570_PHS2SET);
3804 break;
3805 case TPACPI_VIDEO_770:
3806 autosw = video_autosw_get();
3807 if (autosw < 0)
3808 return autosw;
3809
3810 res = video_autosw_set(1);
3811 if (res)
3812 return res;
3813 res = acpi_evalf(vid_handle, NULL,
3814 "ASWT", "vdd", status * 0x100, 0);
3815 if (!autosw && video_autosw_set(autosw)) {
3816 printk(TPACPI_ERR
3817 "video auto-switch left enabled due to error\n");
3818 return -EIO;
3819 }
3820 break;
3821 case TPACPI_VIDEO_NEW:
3822 res = acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0x80) &&
3823 acpi_evalf(NULL, NULL, "\\VSDS", "vdd", status, 1);
3824 break;
3825 default:
3826 return -ENOSYS;
3827 }
3828
3829 return (res)? 0 : -EIO;
3830 }
3831
3832 static int video_autosw_get(void)
3833 {
3834 int autosw = 0;
3835
3836 switch (video_supported) {
3837 case TPACPI_VIDEO_570:
3838 if (!acpi_evalf(vid_handle, &autosw, "SWIT", "d"))
3839 return -EIO;
3840 break;
3841 case TPACPI_VIDEO_770:
3842 case TPACPI_VIDEO_NEW:
3843 if (!acpi_evalf(vid_handle, &autosw, "^VDEE", "d"))
3844 return -EIO;
3845 break;
3846 default:
3847 return -ENOSYS;
3848 }
3849
3850 return autosw & 1;
3851 }
3852
3853 static int video_autosw_set(int enable)
3854 {
3855 if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", (enable)? 1 : 0))
3856 return -EIO;
3857 return 0;
3858 }
3859
3860 static int video_outputsw_cycle(void)
3861 {
3862 int autosw = video_autosw_get();
3863 int res;
3864
3865 if (autosw < 0)
3866 return autosw;
3867
3868 switch (video_supported) {
3869 case TPACPI_VIDEO_570:
3870 res = video_autosw_set(1);
3871 if (res)
3872 return res;
3873 res = acpi_evalf(ec_handle, NULL, "_Q16", "v");
3874 break;
3875 case TPACPI_VIDEO_770:
3876 case TPACPI_VIDEO_NEW:
3877 res = video_autosw_set(1);
3878 if (res)
3879 return res;
3880 res = acpi_evalf(vid_handle, NULL, "VSWT", "v");
3881 break;
3882 default:
3883 return -ENOSYS;
3884 }
3885 if (!autosw && video_autosw_set(autosw)) {
3886 printk(TPACPI_ERR
3887 "video auto-switch left enabled due to error\n");
3888 return -EIO;
3889 }
3890
3891 return (res)? 0 : -EIO;
3892 }
3893
3894 static int video_expand_toggle(void)
3895 {
3896 switch (video_supported) {
3897 case TPACPI_VIDEO_570:
3898 return acpi_evalf(ec_handle, NULL, "_Q17", "v")?
3899 0 : -EIO;
3900 case TPACPI_VIDEO_770:
3901 return acpi_evalf(vid_handle, NULL, "VEXP", "v")?
3902 0 : -EIO;
3903 case TPACPI_VIDEO_NEW:
3904 return acpi_evalf(NULL, NULL, "\\VEXP", "v")?
3905 0 : -EIO;
3906 default:
3907 return -ENOSYS;
3908 }
3909 /* not reached */
3910 }
3911
3912 static int video_read(char *p)
3913 {
3914 int status, autosw;
3915 int len = 0;
3916
3917 if (video_supported == TPACPI_VIDEO_NONE) {
3918 len += sprintf(p + len, "status:\t\tnot supported\n");
3919 return len;
3920 }
3921
3922 status = video_outputsw_get();
3923 if (status < 0)
3924 return status;
3925
3926 autosw = video_autosw_get();
3927 if (autosw < 0)
3928 return autosw;
3929
3930 len += sprintf(p + len, "status:\t\tsupported\n");
3931 len += sprintf(p + len, "lcd:\t\t%s\n", enabled(status, 0));
3932 len += sprintf(p + len, "crt:\t\t%s\n", enabled(status, 1));
3933 if (video_supported == TPACPI_VIDEO_NEW)
3934 len += sprintf(p + len, "dvi:\t\t%s\n", enabled(status, 3));
3935 len += sprintf(p + len, "auto:\t\t%s\n", enabled(autosw, 0));
3936 len += sprintf(p + len, "commands:\tlcd_enable, lcd_disable\n");
3937 len += sprintf(p + len, "commands:\tcrt_enable, crt_disable\n");
3938 if (video_supported == TPACPI_VIDEO_NEW)
3939 len += sprintf(p + len, "commands:\tdvi_enable, dvi_disable\n");
3940 len += sprintf(p + len, "commands:\tauto_enable, auto_disable\n");
3941 len += sprintf(p + len, "commands:\tvideo_switch, expand_toggle\n");
3942
3943 return len;
3944 }
3945
3946 static int video_write(char *buf)
3947 {
3948 char *cmd;
3949 int enable, disable, status;
3950 int res;
3951
3952 if (video_supported == TPACPI_VIDEO_NONE)
3953 return -ENODEV;
3954
3955 enable = 0;
3956 disable = 0;
3957
3958 while ((cmd = next_cmd(&buf))) {
3959 if (strlencmp(cmd, "lcd_enable") == 0) {
3960 enable |= TP_ACPI_VIDEO_S_LCD;
3961 } else if (strlencmp(cmd, "lcd_disable") == 0) {
3962 disable |= TP_ACPI_VIDEO_S_LCD;
3963 } else if (strlencmp(cmd, "crt_enable") == 0) {
3964 enable |= TP_ACPI_VIDEO_S_CRT;
3965 } else if (strlencmp(cmd, "crt_disable") == 0) {
3966 disable |= TP_ACPI_VIDEO_S_CRT;
3967 } else if (video_supported == TPACPI_VIDEO_NEW &&
3968 strlencmp(cmd, "dvi_enable") == 0) {
3969 enable |= TP_ACPI_VIDEO_S_DVI;
3970 } else if (video_supported == TPACPI_VIDEO_NEW &&
3971 strlencmp(cmd, "dvi_disable") == 0) {
3972 disable |= TP_ACPI_VIDEO_S_DVI;
3973 } else if (strlencmp(cmd, "auto_enable") == 0) {
3974 res = video_autosw_set(1);
3975 if (res)
3976 return res;
3977 } else if (strlencmp(cmd, "auto_disable") == 0) {
3978 res = video_autosw_set(0);
3979 if (res)
3980 return res;
3981 } else if (strlencmp(cmd, "video_switch") == 0) {
3982 res = video_outputsw_cycle();
3983 if (res)
3984 return res;
3985 } else if (strlencmp(cmd, "expand_toggle") == 0) {
3986 res = video_expand_toggle();
3987 if (res)
3988 return res;
3989 } else
3990 return -EINVAL;
3991 }
3992
3993 if (enable || disable) {
3994 status = video_outputsw_get();
3995 if (status < 0)
3996 return status;
3997 res = video_outputsw_set((status & ~disable) | enable);
3998 if (res)
3999 return res;
4000 }
4001
4002 return 0;
4003 }
4004
4005 static struct ibm_struct video_driver_data = {
4006 .name = "video",
4007 .read = video_read,
4008 .write = video_write,
4009 .exit = video_exit,
4010 };
4011
4012 #endif /* CONFIG_THINKPAD_ACPI_VIDEO */
4013
4014 /*************************************************************************
4015 * Light (thinklight) subdriver
4016 */
4017
4018 TPACPI_HANDLE(lght, root, "\\LGHT"); /* A21e, A2xm/p, T20-22, X20-21 */
4019 TPACPI_HANDLE(ledb, ec, "LEDB"); /* G4x */
4020
4021 static int light_get_status(void)
4022 {
4023 int status = 0;
4024
4025 if (tp_features.light_status) {
4026 if (!acpi_evalf(ec_handle, &status, "KBLT", "d"))
4027 return -EIO;
4028 return (!!status);
4029 }
4030
4031 return -ENXIO;
4032 }
4033
4034 static int light_set_status(int status)
4035 {
4036 int rc;
4037
4038 if (tp_features.light) {
4039 if (cmos_handle) {
4040 rc = acpi_evalf(cmos_handle, NULL, NULL, "vd",
4041 (status)?
4042 TP_CMOS_THINKLIGHT_ON :
4043 TP_CMOS_THINKLIGHT_OFF);
4044 } else {
4045 rc = acpi_evalf(lght_handle, NULL, NULL, "vd",
4046 (status)? 1 : 0);
4047 }
4048 return (rc)? 0 : -EIO;
4049 }
4050
4051 return -ENXIO;
4052 }
4053
4054 static void light_set_status_worker(struct work_struct *work)
4055 {
4056 struct tpacpi_led_classdev *data =
4057 container_of(work, struct tpacpi_led_classdev, work);
4058
4059 if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING))
4060 light_set_status((data->new_brightness != LED_OFF));
4061 }
4062
4063 static void light_sysfs_set(struct led_classdev *led_cdev,
4064 enum led_brightness brightness)
4065 {
4066 struct tpacpi_led_classdev *data =
4067 container_of(led_cdev,
4068 struct tpacpi_led_classdev,
4069 led_classdev);
4070 data->new_brightness = brightness;
4071 queue_work(tpacpi_wq, &data->work);
4072 }
4073
4074 static enum led_brightness light_sysfs_get(struct led_classdev *led_cdev)
4075 {
4076 return (light_get_status() == 1)? LED_FULL : LED_OFF;
4077 }
4078
4079 static struct tpacpi_led_classdev tpacpi_led_thinklight = {
4080 .led_classdev = {
4081 .name = "tpacpi::thinklight",
4082 .brightness_set = &light_sysfs_set,
4083 .brightness_get = &light_sysfs_get,
4084 }
4085 };
4086
4087 static int __init light_init(struct ibm_init_struct *iibm)
4088 {
4089 int rc;
4090
4091 vdbg_printk(TPACPI_DBG_INIT, "initializing light subdriver\n");
4092
4093 TPACPI_ACPIHANDLE_INIT(ledb);
4094 TPACPI_ACPIHANDLE_INIT(lght);
4095 TPACPI_ACPIHANDLE_INIT(cmos);
4096 INIT_WORK(&tpacpi_led_thinklight.work, light_set_status_worker);
4097
4098 /* light not supported on 570, 600e/x, 770e, 770x, G4x, R30, R31 */
4099 tp_features.light = (cmos_handle || lght_handle) && !ledb_handle;
4100
4101 if (tp_features.light)
4102 /* light status not supported on
4103 570, 600e/x, 770e, 770x, G4x, R30, R31, R32, X20 */
4104 tp_features.light_status =
4105 acpi_evalf(ec_handle, NULL, "KBLT", "qv");
4106
4107 vdbg_printk(TPACPI_DBG_INIT, "light is %s, light status is %s\n",
4108 str_supported(tp_features.light),
4109 str_supported(tp_features.light_status));
4110
4111 if (!tp_features.light)
4112 return 1;
4113
4114 rc = led_classdev_register(&tpacpi_pdev->dev,
4115 &tpacpi_led_thinklight.led_classdev);
4116
4117 if (rc < 0) {
4118 tp_features.light = 0;
4119 tp_features.light_status = 0;
4120 } else {
4121 rc = 0;
4122 }
4123
4124 return rc;
4125 }
4126
4127 static void light_exit(void)
4128 {
4129 led_classdev_unregister(&tpacpi_led_thinklight.led_classdev);
4130 if (work_pending(&tpacpi_led_thinklight.work))
4131 flush_workqueue(tpacpi_wq);
4132 }
4133
4134 static int light_read(char *p)
4135 {
4136 int len = 0;
4137 int status;
4138
4139 if (!tp_features.light) {
4140 len += sprintf(p + len, "status:\t\tnot supported\n");
4141 } else if (!tp_features.light_status) {
4142 len += sprintf(p + len, "status:\t\tunknown\n");
4143 len += sprintf(p + len, "commands:\ton, off\n");
4144 } else {
4145 status = light_get_status();
4146 if (status < 0)
4147 return status;
4148 len += sprintf(p + len, "status:\t\t%s\n", onoff(status, 0));
4149 len += sprintf(p + len, "commands:\ton, off\n");
4150 }
4151
4152 return len;
4153 }
4154
4155 static int light_write(char *buf)
4156 {
4157 char *cmd;
4158 int newstatus = 0;
4159
4160 if (!tp_features.light)
4161 return -ENODEV;
4162
4163 while ((cmd = next_cmd(&buf))) {
4164 if (strlencmp(cmd, "on") == 0) {
4165 newstatus = 1;
4166 } else if (strlencmp(cmd, "off") == 0) {
4167 newstatus = 0;
4168 } else
4169 return -EINVAL;
4170 }
4171
4172 return light_set_status(newstatus);
4173 }
4174
4175 static struct ibm_struct light_driver_data = {
4176 .name = "light",
4177 .read = light_read,
4178 .write = light_write,
4179 .exit = light_exit,
4180 };
4181
4182 /*************************************************************************
4183 * Dock subdriver
4184 */
4185
4186 #ifdef CONFIG_THINKPAD_ACPI_DOCK
4187
4188 static void dock_notify(struct ibm_struct *ibm, u32 event);
4189 static int dock_read(char *p);
4190 static int dock_write(char *buf);
4191
4192 TPACPI_HANDLE(dock, root, "\\_SB.GDCK", /* X30, X31, X40 */
4193 "\\_SB.PCI0.DOCK", /* 600e/x,770e,770x,A2xm/p,T20-22,X20-21 */
4194 "\\_SB.PCI0.PCI1.DOCK", /* all others */
4195 "\\_SB.PCI.ISA.SLCE", /* 570 */
4196 ); /* A21e,G4x,R30,R31,R32,R40,R40e,R50e */
4197
4198 /* don't list other alternatives as we install a notify handler on the 570 */
4199 TPACPI_HANDLE(pci, root, "\\_SB.PCI"); /* 570 */
4200
4201 static const struct acpi_device_id ibm_pci_device_ids[] = {
4202 {PCI_ROOT_HID_STRING, 0},
4203 {"", 0},
4204 };
4205
4206 static struct tp_acpi_drv_struct ibm_dock_acpidriver[2] = {
4207 {
4208 .notify = dock_notify,
4209 .handle = &dock_handle,
4210 .type = ACPI_SYSTEM_NOTIFY,
4211 },
4212 {
4213 /* THIS ONE MUST NEVER BE USED FOR DRIVER AUTOLOADING.
4214 * We just use it to get notifications of dock hotplug
4215 * in very old thinkpads */
4216 .hid = ibm_pci_device_ids,
4217 .notify = dock_notify,
4218 .handle = &pci_handle,
4219 .type = ACPI_SYSTEM_NOTIFY,
4220 },
4221 };
4222
4223 static struct ibm_struct dock_driver_data[2] = {
4224 {
4225 .name = "dock",
4226 .read = dock_read,
4227 .write = dock_write,
4228 .acpi = &ibm_dock_acpidriver[0],
4229 },
4230 {
4231 .name = "dock",
4232 .acpi = &ibm_dock_acpidriver[1],
4233 },
4234 };
4235
4236 #define dock_docked() (_sta(dock_handle) & 1)
4237
4238 static int __init dock_init(struct ibm_init_struct *iibm)
4239 {
4240 vdbg_printk(TPACPI_DBG_INIT, "initializing dock subdriver\n");
4241
4242 TPACPI_ACPIHANDLE_INIT(dock);
4243
4244 vdbg_printk(TPACPI_DBG_INIT, "dock is %s\n",
4245 str_supported(dock_handle != NULL));
4246
4247 return (dock_handle)? 0 : 1;
4248 }
4249
4250 static int __init dock_init2(struct ibm_init_struct *iibm)
4251 {
4252 int dock2_needed;
4253
4254 vdbg_printk(TPACPI_DBG_INIT, "initializing dock subdriver part 2\n");
4255
4256 if (dock_driver_data[0].flags.acpi_driver_registered &&
4257 dock_driver_data[0].flags.acpi_notify_installed) {
4258 TPACPI_ACPIHANDLE_INIT(pci);
4259 dock2_needed = (pci_handle != NULL);
4260 vdbg_printk(TPACPI_DBG_INIT,
4261 "dock PCI handler for the TP 570 is %s\n",
4262 str_supported(dock2_needed));
4263 } else {
4264 vdbg_printk(TPACPI_DBG_INIT,
4265 "dock subdriver part 2 not required\n");
4266 dock2_needed = 0;
4267 }
4268
4269 return (dock2_needed)? 0 : 1;
4270 }
4271
4272 static void dock_notify(struct ibm_struct *ibm, u32 event)
4273 {
4274 int docked = dock_docked();
4275 int pci = ibm->acpi->hid && ibm->acpi->device &&
4276 acpi_match_device_ids(ibm->acpi->device, ibm_pci_device_ids);
4277 int data;
4278
4279 if (event == 1 && !pci) /* 570 */
4280 data = 1; /* button */
4281 else if (event == 1 && pci) /* 570 */
4282 data = 3; /* dock */
4283 else if (event == 3 && docked)
4284 data = 1; /* button */
4285 else if (event == 3 && !docked)
4286 data = 2; /* undock */
4287 else if (event == 0 && docked)
4288 data = 3; /* dock */
4289 else {
4290 printk(TPACPI_ERR "unknown dock event %d, status %d\n",
4291 event, _sta(dock_handle));
4292 data = 0; /* unknown */
4293 }
4294 acpi_bus_generate_proc_event(ibm->acpi->device, event, data);
4295 acpi_bus_generate_netlink_event(ibm->acpi->device->pnp.device_class,
4296 dev_name(&ibm->acpi->device->dev),
4297 event, data);
4298 }
4299
4300 static int dock_read(char *p)
4301 {
4302 int len = 0;
4303 int docked = dock_docked();
4304
4305 if (!dock_handle)
4306 len += sprintf(p + len, "status:\t\tnot supported\n");
4307 else if (!docked)
4308 len += sprintf(p + len, "status:\t\tundocked\n");
4309 else {
4310 len += sprintf(p + len, "status:\t\tdocked\n");
4311 len += sprintf(p + len, "commands:\tdock, undock\n");
4312 }
4313
4314 return len;
4315 }
4316
4317 static int dock_write(char *buf)
4318 {
4319 char *cmd;
4320
4321 if (!dock_docked())
4322 return -ENODEV;
4323
4324 while ((cmd = next_cmd(&buf))) {
4325 if (strlencmp(cmd, "undock") == 0) {
4326 if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 0) ||
4327 !acpi_evalf(dock_handle, NULL, "_EJ0", "vd", 1))
4328 return -EIO;
4329 } else if (strlencmp(cmd, "dock") == 0) {
4330 if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 1))
4331 return -EIO;
4332 } else
4333 return -EINVAL;
4334 }
4335
4336 return 0;
4337 }
4338
4339 #endif /* CONFIG_THINKPAD_ACPI_DOCK */
4340
4341 /*************************************************************************
4342 * Bay subdriver
4343 */
4344
4345 #ifdef CONFIG_THINKPAD_ACPI_BAY
4346
4347 TPACPI_HANDLE(bay, root, "\\_SB.PCI.IDE.SECN.MAST", /* 570 */
4348 "\\_SB.PCI0.IDE0.IDES.IDSM", /* 600e/x, 770e, 770x */
4349 "\\_SB.PCI0.SATA.SCND.MSTR", /* T60, X60, Z60 */
4350 "\\_SB.PCI0.IDE0.SCND.MSTR", /* all others */
4351 ); /* A21e, R30, R31 */
4352 TPACPI_HANDLE(bay_ej, bay, "_EJ3", /* 600e/x, A2xm/p, A3x */
4353 "_EJ0", /* all others */
4354 ); /* 570,A21e,G4x,R30,R31,R32,R40e,R50e */
4355 TPACPI_HANDLE(bay2, root, "\\_SB.PCI0.IDE0.PRIM.SLAV", /* A3x, R32 */
4356 "\\_SB.PCI0.IDE0.IDEP.IDPS", /* 600e/x, 770e, 770x */
4357 ); /* all others */
4358 TPACPI_HANDLE(bay2_ej, bay2, "_EJ3", /* 600e/x, 770e, A3x */
4359 "_EJ0", /* 770x */
4360 ); /* all others */
4361
4362 static int __init bay_init(struct ibm_init_struct *iibm)
4363 {
4364 vdbg_printk(TPACPI_DBG_INIT, "initializing bay subdriver\n");
4365
4366 TPACPI_ACPIHANDLE_INIT(bay);
4367 if (bay_handle)
4368 TPACPI_ACPIHANDLE_INIT(bay_ej);
4369 TPACPI_ACPIHANDLE_INIT(bay2);
4370 if (bay2_handle)
4371 TPACPI_ACPIHANDLE_INIT(bay2_ej);
4372
4373 tp_features.bay_status = bay_handle &&
4374 acpi_evalf(bay_handle, NULL, "_STA", "qv");
4375 tp_features.bay_status2 = bay2_handle &&
4376 acpi_evalf(bay2_handle, NULL, "_STA", "qv");
4377
4378 tp_features.bay_eject = bay_handle && bay_ej_handle &&
4379 (strlencmp(bay_ej_path, "_EJ0") == 0 || experimental);
4380 tp_features.bay_eject2 = bay2_handle && bay2_ej_handle &&
4381 (strlencmp(bay2_ej_path, "_EJ0") == 0 || experimental);
4382
4383 vdbg_printk(TPACPI_DBG_INIT,
4384 "bay 1: status %s, eject %s; bay 2: status %s, eject %s\n",
4385 str_supported(tp_features.bay_status),
4386 str_supported(tp_features.bay_eject),
4387 str_supported(tp_features.bay_status2),
4388 str_supported(tp_features.bay_eject2));
4389
4390 return (tp_features.bay_status || tp_features.bay_eject ||
4391 tp_features.bay_status2 || tp_features.bay_eject2)? 0 : 1;
4392 }
4393
4394 static void bay_notify(struct ibm_struct *ibm, u32 event)
4395 {
4396 acpi_bus_generate_proc_event(ibm->acpi->device, event, 0);
4397 acpi_bus_generate_netlink_event(ibm->acpi->device->pnp.device_class,
4398 dev_name(&ibm->acpi->device->dev),
4399 event, 0);
4400 }
4401
4402 #define bay_occupied(b) (_sta(b##_handle) & 1)
4403
4404 static int bay_read(char *p)
4405 {
4406 int len = 0;
4407 int occupied = bay_occupied(bay);
4408 int occupied2 = bay_occupied(bay2);
4409 int eject, eject2;
4410
4411 len += sprintf(p + len, "status:\t\t%s\n",
4412 tp_features.bay_status ?
4413 (occupied ? "occupied" : "unoccupied") :
4414 "not supported");
4415 if (tp_features.bay_status2)
4416 len += sprintf(p + len, "status2:\t%s\n", occupied2 ?
4417 "occupied" : "unoccupied");
4418
4419 eject = tp_features.bay_eject && occupied;
4420 eject2 = tp_features.bay_eject2 && occupied2;
4421
4422 if (eject && eject2)
4423 len += sprintf(p + len, "commands:\teject, eject2\n");
4424 else if (eject)
4425 len += sprintf(p + len, "commands:\teject\n");
4426 else if (eject2)
4427 len += sprintf(p + len, "commands:\teject2\n");
4428
4429 return len;
4430 }
4431
4432 static int bay_write(char *buf)
4433 {
4434 char *cmd;
4435
4436 if (!tp_features.bay_eject && !tp_features.bay_eject2)
4437 return -ENODEV;
4438
4439 while ((cmd = next_cmd(&buf))) {
4440 if (tp_features.bay_eject && strlencmp(cmd, "eject") == 0) {
4441 if (!acpi_evalf(bay_ej_handle, NULL, NULL, "vd", 1))
4442 return -EIO;
4443 } else if (tp_features.bay_eject2 &&
4444 strlencmp(cmd, "eject2") == 0) {
4445 if (!acpi_evalf(bay2_ej_handle, NULL, NULL, "vd", 1))
4446 return -EIO;
4447 } else
4448 return -EINVAL;
4449 }
4450
4451 return 0;
4452 }
4453
4454 static struct tp_acpi_drv_struct ibm_bay_acpidriver = {
4455 .notify = bay_notify,
4456 .handle = &bay_handle,
4457 .type = ACPI_SYSTEM_NOTIFY,
4458 };
4459
4460 static struct ibm_struct bay_driver_data = {
4461 .name = "bay",
4462 .read = bay_read,
4463 .write = bay_write,
4464 .acpi = &ibm_bay_acpidriver,
4465 };
4466
4467 #endif /* CONFIG_THINKPAD_ACPI_BAY */
4468
4469 /*************************************************************************
4470 * CMOS subdriver
4471 */
4472
4473 /* sysfs cmos_command -------------------------------------------------- */
4474 static ssize_t cmos_command_store(struct device *dev,
4475 struct device_attribute *attr,
4476 const char *buf, size_t count)
4477 {
4478 unsigned long cmos_cmd;
4479 int res;
4480
4481 if (parse_strtoul(buf, 21, &cmos_cmd))
4482 return -EINVAL;
4483
4484 res = issue_thinkpad_cmos_command(cmos_cmd);
4485 return (res)? res : count;
4486 }
4487
4488 static struct device_attribute dev_attr_cmos_command =
4489 __ATTR(cmos_command, S_IWUSR, NULL, cmos_command_store);
4490
4491 /* --------------------------------------------------------------------- */
4492
4493 static int __init cmos_init(struct ibm_init_struct *iibm)
4494 {
4495 int res;
4496
4497 vdbg_printk(TPACPI_DBG_INIT,
4498 "initializing cmos commands subdriver\n");
4499
4500 TPACPI_ACPIHANDLE_INIT(cmos);
4501
4502 vdbg_printk(TPACPI_DBG_INIT, "cmos commands are %s\n",
4503 str_supported(cmos_handle != NULL));
4504
4505 res = device_create_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
4506 if (res)
4507 return res;
4508
4509 return (cmos_handle)? 0 : 1;
4510 }
4511
4512 static void cmos_exit(void)
4513 {
4514 device_remove_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
4515 }
4516
4517 static int cmos_read(char *p)
4518 {
4519 int len = 0;
4520
4521 /* cmos not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
4522 R30, R31, T20-22, X20-21 */
4523 if (!cmos_handle)
4524 len += sprintf(p + len, "status:\t\tnot supported\n");
4525 else {
4526 len += sprintf(p + len, "status:\t\tsupported\n");
4527 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-21)\n");
4528 }
4529
4530 return len;
4531 }
4532
4533 static int cmos_write(char *buf)
4534 {
4535 char *cmd;
4536 int cmos_cmd, res;
4537
4538 while ((cmd = next_cmd(&buf))) {
4539 if (sscanf(cmd, "%u", &cmos_cmd) == 1 &&
4540 cmos_cmd >= 0 && cmos_cmd <= 21) {
4541 /* cmos_cmd set */
4542 } else
4543 return -EINVAL;
4544
4545 res = issue_thinkpad_cmos_command(cmos_cmd);
4546 if (res)
4547 return res;
4548 }
4549
4550 return 0;
4551 }
4552
4553 static struct ibm_struct cmos_driver_data = {
4554 .name = "cmos",
4555 .read = cmos_read,
4556 .write = cmos_write,
4557 .exit = cmos_exit,
4558 };
4559
4560 /*************************************************************************
4561 * LED subdriver
4562 */
4563
4564 enum led_access_mode {
4565 TPACPI_LED_NONE = 0,
4566 TPACPI_LED_570, /* 570 */
4567 TPACPI_LED_OLD, /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
4568 TPACPI_LED_NEW, /* all others */
4569 };
4570
4571 enum { /* For TPACPI_LED_OLD */
4572 TPACPI_LED_EC_HLCL = 0x0c, /* EC reg to get led to power on */
4573 TPACPI_LED_EC_HLBL = 0x0d, /* EC reg to blink a lit led */
4574 TPACPI_LED_EC_HLMS = 0x0e, /* EC reg to select led to command */
4575 };
4576
4577 enum led_status_t {
4578 TPACPI_LED_OFF = 0,
4579 TPACPI_LED_ON,
4580 TPACPI_LED_BLINK,
4581 };
4582
4583 static enum led_access_mode led_supported;
4584
4585 TPACPI_HANDLE(led, ec, "SLED", /* 570 */
4586 "SYSL", /* 600e/x, 770e, 770x, A21e, A2xm/p, */
4587 /* T20-22, X20-21 */
4588 "LED", /* all others */
4589 ); /* R30, R31 */
4590
4591 #define TPACPI_LED_NUMLEDS 8
4592 static struct tpacpi_led_classdev *tpacpi_leds;
4593 static enum led_status_t tpacpi_led_state_cache[TPACPI_LED_NUMLEDS];
4594 static const char * const tpacpi_led_names[TPACPI_LED_NUMLEDS] = {
4595 /* there's a limit of 19 chars + NULL before 2.6.26 */
4596 "tpacpi::power",
4597 "tpacpi:orange:batt",
4598 "tpacpi:green:batt",
4599 "tpacpi::dock_active",
4600 "tpacpi::bay_active",
4601 "tpacpi::dock_batt",
4602 "tpacpi::unknown_led",
4603 "tpacpi::standby",
4604 };
4605
4606 static int led_get_status(const unsigned int led)
4607 {
4608 int status;
4609 enum led_status_t led_s;
4610
4611 switch (led_supported) {
4612 case TPACPI_LED_570:
4613 if (!acpi_evalf(ec_handle,
4614 &status, "GLED", "dd", 1 << led))
4615 return -EIO;
4616 led_s = (status == 0)?
4617 TPACPI_LED_OFF :
4618 ((status == 1)?
4619 TPACPI_LED_ON :
4620 TPACPI_LED_BLINK);
4621 tpacpi_led_state_cache[led] = led_s;
4622 return led_s;
4623 default:
4624 return -ENXIO;
4625 }
4626
4627 /* not reached */
4628 }
4629
4630 static int led_set_status(const unsigned int led,
4631 const enum led_status_t ledstatus)
4632 {
4633 /* off, on, blink. Index is led_status_t */
4634 static const unsigned int led_sled_arg1[] = { 0, 1, 3 };
4635 static const unsigned int led_led_arg1[] = { 0, 0x80, 0xc0 };
4636
4637 int rc = 0;
4638
4639 switch (led_supported) {
4640 case TPACPI_LED_570:
4641 /* 570 */
4642 if (led > 7)
4643 return -EINVAL;
4644 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
4645 (1 << led), led_sled_arg1[ledstatus]))
4646 rc = -EIO;
4647 break;
4648 case TPACPI_LED_OLD:
4649 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */
4650 if (led > 7)
4651 return -EINVAL;
4652 rc = ec_write(TPACPI_LED_EC_HLMS, (1 << led));
4653 if (rc >= 0)
4654 rc = ec_write(TPACPI_LED_EC_HLBL,
4655 (ledstatus == TPACPI_LED_BLINK) << led);
4656 if (rc >= 0)
4657 rc = ec_write(TPACPI_LED_EC_HLCL,
4658 (ledstatus != TPACPI_LED_OFF) << led);
4659 break;
4660 case TPACPI_LED_NEW:
4661 /* all others */
4662 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
4663 led, led_led_arg1[ledstatus]))
4664 rc = -EIO;
4665 break;
4666 default:
4667 rc = -ENXIO;
4668 }
4669
4670 if (!rc)
4671 tpacpi_led_state_cache[led] = ledstatus;
4672
4673 return rc;
4674 }
4675
4676 static void led_sysfs_set_status(unsigned int led,
4677 enum led_brightness brightness)
4678 {
4679 led_set_status(led,
4680 (brightness == LED_OFF) ?
4681 TPACPI_LED_OFF :
4682 (tpacpi_led_state_cache[led] == TPACPI_LED_BLINK) ?
4683 TPACPI_LED_BLINK : TPACPI_LED_ON);
4684 }
4685
4686 static void led_set_status_worker(struct work_struct *work)
4687 {
4688 struct tpacpi_led_classdev *data =
4689 container_of(work, struct tpacpi_led_classdev, work);
4690
4691 if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING))
4692 led_sysfs_set_status(data->led, data->new_brightness);
4693 }
4694
4695 static void led_sysfs_set(struct led_classdev *led_cdev,
4696 enum led_brightness brightness)
4697 {
4698 struct tpacpi_led_classdev *data = container_of(led_cdev,
4699 struct tpacpi_led_classdev, led_classdev);
4700
4701 data->new_brightness = brightness;
4702 queue_work(tpacpi_wq, &data->work);
4703 }
4704
4705 static int led_sysfs_blink_set(struct led_classdev *led_cdev,
4706 unsigned long *delay_on, unsigned long *delay_off)
4707 {
4708 struct tpacpi_led_classdev *data = container_of(led_cdev,
4709 struct tpacpi_led_classdev, led_classdev);
4710
4711 /* Can we choose the flash rate? */
4712 if (*delay_on == 0 && *delay_off == 0) {
4713 /* yes. set them to the hardware blink rate (1 Hz) */
4714 *delay_on = 500; /* ms */
4715 *delay_off = 500; /* ms */
4716 } else if ((*delay_on != 500) || (*delay_off != 500))
4717 return -EINVAL;
4718
4719 data->new_brightness = TPACPI_LED_BLINK;
4720 queue_work(tpacpi_wq, &data->work);
4721
4722 return 0;
4723 }
4724
4725 static enum led_brightness led_sysfs_get(struct led_classdev *led_cdev)
4726 {
4727 int rc;
4728
4729 struct tpacpi_led_classdev *data = container_of(led_cdev,
4730 struct tpacpi_led_classdev, led_classdev);
4731
4732 rc = led_get_status(data->led);
4733
4734 if (rc == TPACPI_LED_OFF || rc < 0)
4735 rc = LED_OFF; /* no error handling in led class :( */
4736 else
4737 rc = LED_FULL;
4738
4739 return rc;
4740 }
4741
4742 static void led_exit(void)
4743 {
4744 unsigned int i;
4745
4746 for (i = 0; i < TPACPI_LED_NUMLEDS; i++) {
4747 if (tpacpi_leds[i].led_classdev.name)
4748 led_classdev_unregister(&tpacpi_leds[i].led_classdev);
4749 }
4750
4751 kfree(tpacpi_leds);
4752 }
4753
4754 static int __init led_init(struct ibm_init_struct *iibm)
4755 {
4756 unsigned int i;
4757 int rc;
4758
4759 vdbg_printk(TPACPI_DBG_INIT, "initializing LED subdriver\n");
4760
4761 TPACPI_ACPIHANDLE_INIT(led);
4762
4763 if (!led_handle)
4764 /* led not supported on R30, R31 */
4765 led_supported = TPACPI_LED_NONE;
4766 else if (strlencmp(led_path, "SLED") == 0)
4767 /* 570 */
4768 led_supported = TPACPI_LED_570;
4769 else if (strlencmp(led_path, "SYSL") == 0)
4770 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
4771 led_supported = TPACPI_LED_OLD;
4772 else
4773 /* all others */
4774 led_supported = TPACPI_LED_NEW;
4775
4776 vdbg_printk(TPACPI_DBG_INIT, "LED commands are %s, mode %d\n",
4777 str_supported(led_supported), led_supported);
4778
4779 tpacpi_leds = kzalloc(sizeof(*tpacpi_leds) * TPACPI_LED_NUMLEDS,
4780 GFP_KERNEL);
4781 if (!tpacpi_leds) {
4782 printk(TPACPI_ERR "Out of memory for LED data\n");
4783 return -ENOMEM;
4784 }
4785
4786 for (i = 0; i < TPACPI_LED_NUMLEDS; i++) {
4787 tpacpi_leds[i].led = i;
4788
4789 tpacpi_leds[i].led_classdev.brightness_set = &led_sysfs_set;
4790 tpacpi_leds[i].led_classdev.blink_set = &led_sysfs_blink_set;
4791 if (led_supported == TPACPI_LED_570)
4792 tpacpi_leds[i].led_classdev.brightness_get =
4793 &led_sysfs_get;
4794
4795 tpacpi_leds[i].led_classdev.name = tpacpi_led_names[i];
4796
4797 INIT_WORK(&tpacpi_leds[i].work, led_set_status_worker);
4798
4799 rc = led_classdev_register(&tpacpi_pdev->dev,
4800 &tpacpi_leds[i].led_classdev);
4801 if (rc < 0) {
4802 tpacpi_leds[i].led_classdev.name = NULL;
4803 led_exit();
4804 return rc;
4805 }
4806 }
4807
4808 return (led_supported != TPACPI_LED_NONE)? 0 : 1;
4809 }
4810
4811 #define str_led_status(s) \
4812 ((s) == TPACPI_LED_OFF ? "off" : \
4813 ((s) == TPACPI_LED_ON ? "on" : "blinking"))
4814
4815 static int led_read(char *p)
4816 {
4817 int len = 0;
4818
4819 if (!led_supported) {
4820 len += sprintf(p + len, "status:\t\tnot supported\n");
4821 return len;
4822 }
4823 len += sprintf(p + len, "status:\t\tsupported\n");
4824
4825 if (led_supported == TPACPI_LED_570) {
4826 /* 570 */
4827 int i, status;
4828 for (i = 0; i < 8; i++) {
4829 status = led_get_status(i);
4830 if (status < 0)
4831 return -EIO;
4832 len += sprintf(p + len, "%d:\t\t%s\n",
4833 i, str_led_status(status));
4834 }
4835 }
4836
4837 len += sprintf(p + len, "commands:\t"
4838 "<led> on, <led> off, <led> blink (<led> is 0-7)\n");
4839
4840 return len;
4841 }
4842
4843 static int led_write(char *buf)
4844 {
4845 char *cmd;
4846 int led, rc;
4847 enum led_status_t s;
4848
4849 if (!led_supported)
4850 return -ENODEV;
4851
4852 while ((cmd = next_cmd(&buf))) {
4853 if (sscanf(cmd, "%d", &led) != 1 || led < 0 || led > 7)
4854 return -EINVAL;
4855
4856 if (strstr(cmd, "off")) {
4857 s = TPACPI_LED_OFF;
4858 } else if (strstr(cmd, "on")) {
4859 s = TPACPI_LED_ON;
4860 } else if (strstr(cmd, "blink")) {
4861 s = TPACPI_LED_BLINK;
4862 } else {
4863 return -EINVAL;
4864 }
4865
4866 rc = led_set_status(led, s);
4867 if (rc < 0)
4868 return rc;
4869 }
4870
4871 return 0;
4872 }
4873
4874 static struct ibm_struct led_driver_data = {
4875 .name = "led",
4876 .read = led_read,
4877 .write = led_write,
4878 .exit = led_exit,
4879 };
4880
4881 /*************************************************************************
4882 * Beep subdriver
4883 */
4884
4885 TPACPI_HANDLE(beep, ec, "BEEP"); /* all except R30, R31 */
4886
4887 static int __init beep_init(struct ibm_init_struct *iibm)
4888 {
4889 vdbg_printk(TPACPI_DBG_INIT, "initializing beep subdriver\n");
4890
4891 TPACPI_ACPIHANDLE_INIT(beep);
4892
4893 vdbg_printk(TPACPI_DBG_INIT, "beep is %s\n",
4894 str_supported(beep_handle != NULL));
4895
4896 return (beep_handle)? 0 : 1;
4897 }
4898
4899 static int beep_read(char *p)
4900 {
4901 int len = 0;
4902
4903 if (!beep_handle)
4904 len += sprintf(p + len, "status:\t\tnot supported\n");
4905 else {
4906 len += sprintf(p + len, "status:\t\tsupported\n");
4907 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-17)\n");
4908 }
4909
4910 return len;
4911 }
4912
4913 static int beep_write(char *buf)
4914 {
4915 char *cmd;
4916 int beep_cmd;
4917
4918 if (!beep_handle)
4919 return -ENODEV;
4920
4921 while ((cmd = next_cmd(&buf))) {
4922 if (sscanf(cmd, "%u", &beep_cmd) == 1 &&
4923 beep_cmd >= 0 && beep_cmd <= 17) {
4924 /* beep_cmd set */
4925 } else
4926 return -EINVAL;
4927 if (!acpi_evalf(beep_handle, NULL, NULL, "vdd", beep_cmd, 0))
4928 return -EIO;
4929 }
4930
4931 return 0;
4932 }
4933
4934 static struct ibm_struct beep_driver_data = {
4935 .name = "beep",
4936 .read = beep_read,
4937 .write = beep_write,
4938 };
4939
4940 /*************************************************************************
4941 * Thermal subdriver
4942 */
4943
4944 enum thermal_access_mode {
4945 TPACPI_THERMAL_NONE = 0, /* No thermal support */
4946 TPACPI_THERMAL_ACPI_TMP07, /* Use ACPI TMP0-7 */
4947 TPACPI_THERMAL_ACPI_UPDT, /* Use ACPI TMP0-7 with UPDT */
4948 TPACPI_THERMAL_TPEC_8, /* Use ACPI EC regs, 8 sensors */
4949 TPACPI_THERMAL_TPEC_16, /* Use ACPI EC regs, 16 sensors */
4950 };
4951
4952 enum { /* TPACPI_THERMAL_TPEC_* */
4953 TP_EC_THERMAL_TMP0 = 0x78, /* ACPI EC regs TMP 0..7 */
4954 TP_EC_THERMAL_TMP8 = 0xC0, /* ACPI EC regs TMP 8..15 */
4955 TP_EC_THERMAL_TMP_NA = -128, /* ACPI EC sensor not available */
4956 };
4957
4958 #define TPACPI_MAX_THERMAL_SENSORS 16 /* Max thermal sensors supported */
4959 struct ibm_thermal_sensors_struct {
4960 s32 temp[TPACPI_MAX_THERMAL_SENSORS];
4961 };
4962
4963 static enum thermal_access_mode thermal_read_mode;
4964
4965 /* idx is zero-based */
4966 static int thermal_get_sensor(int idx, s32 *value)
4967 {
4968 int t;
4969 s8 tmp;
4970 char tmpi[5];
4971
4972 t = TP_EC_THERMAL_TMP0;
4973
4974 switch (thermal_read_mode) {
4975 #if TPACPI_MAX_THERMAL_SENSORS >= 16
4976 case TPACPI_THERMAL_TPEC_16:
4977 if (idx >= 8 && idx <= 15) {
4978 t = TP_EC_THERMAL_TMP8;
4979 idx -= 8;
4980 }
4981 /* fallthrough */
4982 #endif
4983 case TPACPI_THERMAL_TPEC_8:
4984 if (idx <= 7) {
4985 if (!acpi_ec_read(t + idx, &tmp))
4986 return -EIO;
4987 *value = tmp * 1000;
4988 return 0;
4989 }
4990 break;
4991
4992 case TPACPI_THERMAL_ACPI_UPDT:
4993 if (idx <= 7) {
4994 snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
4995 if (!acpi_evalf(ec_handle, NULL, "UPDT", "v"))
4996 return -EIO;
4997 if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
4998 return -EIO;
4999 *value = (t - 2732) * 100;
5000 return 0;
5001 }
5002 break;
5003
5004 case TPACPI_THERMAL_ACPI_TMP07:
5005 if (idx <= 7) {
5006 snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
5007 if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
5008 return -EIO;
5009 if (t > 127 || t < -127)
5010 t = TP_EC_THERMAL_TMP_NA;
5011 *value = t * 1000;
5012 return 0;
5013 }
5014 break;
5015
5016 case TPACPI_THERMAL_NONE:
5017 default:
5018 return -ENOSYS;
5019 }
5020
5021 return -EINVAL;
5022 }
5023
5024 static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s)
5025 {
5026 int res, i;
5027 int n;
5028
5029 n = 8;
5030 i = 0;
5031
5032 if (!s)
5033 return -EINVAL;
5034
5035 if (thermal_read_mode == TPACPI_THERMAL_TPEC_16)
5036 n = 16;
5037
5038 for (i = 0 ; i < n; i++) {
5039 res = thermal_get_sensor(i, &s->temp[i]);
5040 if (res)
5041 return res;
5042 }
5043
5044 return n;
5045 }
5046
5047 /* sysfs temp##_input -------------------------------------------------- */
5048
5049 static ssize_t thermal_temp_input_show(struct device *dev,
5050 struct device_attribute *attr,
5051 char *buf)
5052 {
5053 struct sensor_device_attribute *sensor_attr =
5054 to_sensor_dev_attr(attr);
5055 int idx = sensor_attr->index;
5056 s32 value;
5057 int res;
5058
5059 res = thermal_get_sensor(idx, &value);
5060 if (res)
5061 return res;
5062 if (value == TP_EC_THERMAL_TMP_NA * 1000)
5063 return -ENXIO;
5064
5065 return snprintf(buf, PAGE_SIZE, "%d\n", value);
5066 }
5067
5068 #define THERMAL_SENSOR_ATTR_TEMP(_idxA, _idxB) \
5069 SENSOR_ATTR(temp##_idxA##_input, S_IRUGO, \
5070 thermal_temp_input_show, NULL, _idxB)
5071
5072 static struct sensor_device_attribute sensor_dev_attr_thermal_temp_input[] = {
5073 THERMAL_SENSOR_ATTR_TEMP(1, 0),
5074 THERMAL_SENSOR_ATTR_TEMP(2, 1),
5075 THERMAL_SENSOR_ATTR_TEMP(3, 2),
5076 THERMAL_SENSOR_ATTR_TEMP(4, 3),
5077 THERMAL_SENSOR_ATTR_TEMP(5, 4),
5078 THERMAL_SENSOR_ATTR_TEMP(6, 5),
5079 THERMAL_SENSOR_ATTR_TEMP(7, 6),
5080 THERMAL_SENSOR_ATTR_TEMP(8, 7),
5081 THERMAL_SENSOR_ATTR_TEMP(9, 8),
5082 THERMAL_SENSOR_ATTR_TEMP(10, 9),
5083 THERMAL_SENSOR_ATTR_TEMP(11, 10),
5084 THERMAL_SENSOR_ATTR_TEMP(12, 11),
5085 THERMAL_SENSOR_ATTR_TEMP(13, 12),
5086 THERMAL_SENSOR_ATTR_TEMP(14, 13),
5087 THERMAL_SENSOR_ATTR_TEMP(15, 14),
5088 THERMAL_SENSOR_ATTR_TEMP(16, 15),
5089 };
5090
5091 #define THERMAL_ATTRS(X) \
5092 &sensor_dev_attr_thermal_temp_input[X].dev_attr.attr
5093
5094 static struct attribute *thermal_temp_input_attr[] = {
5095 THERMAL_ATTRS(8),
5096 THERMAL_ATTRS(9),
5097 THERMAL_ATTRS(10),
5098 THERMAL_ATTRS(11),
5099 THERMAL_ATTRS(12),
5100 THERMAL_ATTRS(13),
5101 THERMAL_ATTRS(14),
5102 THERMAL_ATTRS(15),
5103 THERMAL_ATTRS(0),
5104 THERMAL_ATTRS(1),
5105 THERMAL_ATTRS(2),
5106 THERMAL_ATTRS(3),
5107 THERMAL_ATTRS(4),
5108 THERMAL_ATTRS(5),
5109 THERMAL_ATTRS(6),
5110 THERMAL_ATTRS(7),
5111 NULL
5112 };
5113
5114 static const struct attribute_group thermal_temp_input16_group = {
5115 .attrs = thermal_temp_input_attr
5116 };
5117
5118 static const struct attribute_group thermal_temp_input8_group = {
5119 .attrs = &thermal_temp_input_attr[8]
5120 };
5121
5122 #undef THERMAL_SENSOR_ATTR_TEMP
5123 #undef THERMAL_ATTRS
5124
5125 /* --------------------------------------------------------------------- */
5126
5127 static int __init thermal_init(struct ibm_init_struct *iibm)
5128 {
5129 u8 t, ta1, ta2;
5130 int i;
5131 int acpi_tmp7;
5132 int res;
5133
5134 vdbg_printk(TPACPI_DBG_INIT, "initializing thermal subdriver\n");
5135
5136 acpi_tmp7 = acpi_evalf(ec_handle, NULL, "TMP7", "qv");
5137
5138 if (thinkpad_id.ec_model) {
5139 /*
5140 * Direct EC access mode: sensors at registers
5141 * 0x78-0x7F, 0xC0-0xC7. Registers return 0x00 for
5142 * non-implemented, thermal sensors return 0x80 when
5143 * not available
5144 */
5145
5146 ta1 = ta2 = 0;
5147 for (i = 0; i < 8; i++) {
5148 if (acpi_ec_read(TP_EC_THERMAL_TMP0 + i, &t)) {
5149 ta1 |= t;
5150 } else {
5151 ta1 = 0;
5152 break;
5153 }
5154 if (acpi_ec_read(TP_EC_THERMAL_TMP8 + i, &t)) {
5155 ta2 |= t;
5156 } else {
5157 ta1 = 0;
5158 break;
5159 }
5160 }
5161 if (ta1 == 0) {
5162 /* This is sheer paranoia, but we handle it anyway */
5163 if (acpi_tmp7) {
5164 printk(TPACPI_ERR
5165 "ThinkPad ACPI EC access misbehaving, "
5166 "falling back to ACPI TMPx access "
5167 "mode\n");
5168 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
5169 } else {
5170 printk(TPACPI_ERR
5171 "ThinkPad ACPI EC access misbehaving, "
5172 "disabling thermal sensors access\n");
5173 thermal_read_mode = TPACPI_THERMAL_NONE;
5174 }
5175 } else {
5176 thermal_read_mode =
5177 (ta2 != 0) ?
5178 TPACPI_THERMAL_TPEC_16 : TPACPI_THERMAL_TPEC_8;
5179 }
5180 } else if (acpi_tmp7) {
5181 if (acpi_evalf(ec_handle, NULL, "UPDT", "qv")) {
5182 /* 600e/x, 770e, 770x */
5183 thermal_read_mode = TPACPI_THERMAL_ACPI_UPDT;
5184 } else {
5185 /* Standard ACPI TMPx access, max 8 sensors */
5186 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
5187 }
5188 } else {
5189 /* temperatures not supported on 570, G4x, R30, R31, R32 */
5190 thermal_read_mode = TPACPI_THERMAL_NONE;
5191 }
5192
5193 vdbg_printk(TPACPI_DBG_INIT, "thermal is %s, mode %d\n",
5194 str_supported(thermal_read_mode != TPACPI_THERMAL_NONE),
5195 thermal_read_mode);
5196
5197 switch (thermal_read_mode) {
5198 case TPACPI_THERMAL_TPEC_16:
5199 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
5200 &thermal_temp_input16_group);
5201 if (res)
5202 return res;
5203 break;
5204 case TPACPI_THERMAL_TPEC_8:
5205 case TPACPI_THERMAL_ACPI_TMP07:
5206 case TPACPI_THERMAL_ACPI_UPDT:
5207 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
5208 &thermal_temp_input8_group);
5209 if (res)
5210 return res;
5211 break;
5212 case TPACPI_THERMAL_NONE:
5213 default:
5214 return 1;
5215 }
5216
5217 return 0;
5218 }
5219
5220 static void thermal_exit(void)
5221 {
5222 switch (thermal_read_mode) {
5223 case TPACPI_THERMAL_TPEC_16:
5224 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
5225 &thermal_temp_input16_group);
5226 break;
5227 case TPACPI_THERMAL_TPEC_8:
5228 case TPACPI_THERMAL_ACPI_TMP07:
5229 case TPACPI_THERMAL_ACPI_UPDT:
5230 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
5231 &thermal_temp_input16_group);
5232 break;
5233 case TPACPI_THERMAL_NONE:
5234 default:
5235 break;
5236 }
5237 }
5238
5239 static int thermal_read(char *p)
5240 {
5241 int len = 0;
5242 int n, i;
5243 struct ibm_thermal_sensors_struct t;
5244
5245 n = thermal_get_sensors(&t);
5246 if (unlikely(n < 0))
5247 return n;
5248
5249 len += sprintf(p + len, "temperatures:\t");
5250
5251 if (n > 0) {
5252 for (i = 0; i < (n - 1); i++)
5253 len += sprintf(p + len, "%d ", t.temp[i] / 1000);
5254 len += sprintf(p + len, "%d\n", t.temp[i] / 1000);
5255 } else
5256 len += sprintf(p + len, "not supported\n");
5257
5258 return len;
5259 }
5260
5261 static struct ibm_struct thermal_driver_data = {
5262 .name = "thermal",
5263 .read = thermal_read,
5264 .exit = thermal_exit,
5265 };
5266
5267 /*************************************************************************
5268 * EC Dump subdriver
5269 */
5270
5271 static u8 ecdump_regs[256];
5272
5273 static int ecdump_read(char *p)
5274 {
5275 int len = 0;
5276 int i, j;
5277 u8 v;
5278
5279 len += sprintf(p + len, "EC "
5280 " +00 +01 +02 +03 +04 +05 +06 +07"
5281 " +08 +09 +0a +0b +0c +0d +0e +0f\n");
5282 for (i = 0; i < 256; i += 16) {
5283 len += sprintf(p + len, "EC 0x%02x:", i);
5284 for (j = 0; j < 16; j++) {
5285 if (!acpi_ec_read(i + j, &v))
5286 break;
5287 if (v != ecdump_regs[i + j])
5288 len += sprintf(p + len, " *%02x", v);
5289 else
5290 len += sprintf(p + len, " %02x", v);
5291 ecdump_regs[i + j] = v;
5292 }
5293 len += sprintf(p + len, "\n");
5294 if (j != 16)
5295 break;
5296 }
5297
5298 /* These are way too dangerous to advertise openly... */
5299 #if 0
5300 len += sprintf(p + len, "commands:\t0x<offset> 0x<value>"
5301 " (<offset> is 00-ff, <value> is 00-ff)\n");
5302 len += sprintf(p + len, "commands:\t0x<offset> <value> "
5303 " (<offset> is 00-ff, <value> is 0-255)\n");
5304 #endif
5305 return len;
5306 }
5307
5308 static int ecdump_write(char *buf)
5309 {
5310 char *cmd;
5311 int i, v;
5312
5313 while ((cmd = next_cmd(&buf))) {
5314 if (sscanf(cmd, "0x%x 0x%x", &i, &v) == 2) {
5315 /* i and v set */
5316 } else if (sscanf(cmd, "0x%x %u", &i, &v) == 2) {
5317 /* i and v set */
5318 } else
5319 return -EINVAL;
5320 if (i >= 0 && i < 256 && v >= 0 && v < 256) {
5321 if (!acpi_ec_write(i, v))
5322 return -EIO;
5323 } else
5324 return -EINVAL;
5325 }
5326
5327 return 0;
5328 }
5329
5330 static struct ibm_struct ecdump_driver_data = {
5331 .name = "ecdump",
5332 .read = ecdump_read,
5333 .write = ecdump_write,
5334 .flags.experimental = 1,
5335 };
5336
5337 /*************************************************************************
5338 * Backlight/brightness subdriver
5339 */
5340
5341 #define TPACPI_BACKLIGHT_DEV_NAME "thinkpad_screen"
5342
5343 enum {
5344 TP_EC_BACKLIGHT = 0x31,
5345
5346 /* TP_EC_BACKLIGHT bitmasks */
5347 TP_EC_BACKLIGHT_LVLMSK = 0x1F,
5348 TP_EC_BACKLIGHT_CMDMSK = 0xE0,
5349 TP_EC_BACKLIGHT_MAPSW = 0x20,
5350 };
5351
5352 static struct backlight_device *ibm_backlight_device;
5353 static int brightness_mode;
5354 static unsigned int brightness_enable = 2; /* 2 = auto, 0 = no, 1 = yes */
5355
5356 static struct mutex brightness_mutex;
5357
5358 /*
5359 * ThinkPads can read brightness from two places: EC 0x31, or
5360 * CMOS NVRAM byte 0x5E, bits 0-3.
5361 *
5362 * EC 0x31 has the following layout
5363 * Bit 7: unknown function
5364 * Bit 6: unknown function
5365 * Bit 5: Z: honour scale changes, NZ: ignore scale changes
5366 * Bit 4: must be set to zero to avoid problems
5367 * Bit 3-0: backlight brightness level
5368 *
5369 * brightness_get_raw returns status data in the EC 0x31 layout
5370 */
5371 static int brightness_get_raw(int *status)
5372 {
5373 u8 lec = 0, lcmos = 0, level = 0;
5374
5375 if (brightness_mode & 1) {
5376 if (!acpi_ec_read(TP_EC_BACKLIGHT, &lec))
5377 return -EIO;
5378 level = lec & TP_EC_BACKLIGHT_LVLMSK;
5379 };
5380 if (brightness_mode & 2) {
5381 lcmos = (nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS)
5382 & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
5383 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
5384 lcmos &= (tp_features.bright_16levels)? 0x0f : 0x07;
5385 level = lcmos;
5386 }
5387
5388 if (brightness_mode == 3) {
5389 *status = lec; /* Prefer EC, CMOS is just a backing store */
5390 lec &= TP_EC_BACKLIGHT_LVLMSK;
5391 if (lec == lcmos)
5392 tp_warned.bright_cmos_ec_unsync = 0;
5393 else {
5394 if (!tp_warned.bright_cmos_ec_unsync) {
5395 printk(TPACPI_ERR
5396 "CMOS NVRAM (%u) and EC (%u) do not "
5397 "agree on display brightness level\n",
5398 (unsigned int) lcmos,
5399 (unsigned int) lec);
5400 tp_warned.bright_cmos_ec_unsync = 1;
5401 }
5402 return -EIO;
5403 }
5404 } else {
5405 *status = level;
5406 }
5407
5408 return 0;
5409 }
5410
5411 /* May return EINTR which can always be mapped to ERESTARTSYS */
5412 static int brightness_set(int value)
5413 {
5414 int cmos_cmd, inc, i, res;
5415 int current_value;
5416 int command_bits;
5417
5418 if (value > ((tp_features.bright_16levels)? 15 : 7) ||
5419 value < 0)
5420 return -EINVAL;
5421
5422 res = mutex_lock_killable(&brightness_mutex);
5423 if (res < 0)
5424 return res;
5425
5426 res = brightness_get_raw(&current_value);
5427 if (res < 0)
5428 goto errout;
5429
5430 command_bits = current_value & TP_EC_BACKLIGHT_CMDMSK;
5431 current_value &= TP_EC_BACKLIGHT_LVLMSK;
5432
5433 cmos_cmd = value > current_value ?
5434 TP_CMOS_BRIGHTNESS_UP :
5435 TP_CMOS_BRIGHTNESS_DOWN;
5436 inc = (value > current_value)? 1 : -1;
5437
5438 res = 0;
5439 for (i = current_value; i != value; i += inc) {
5440 if ((brightness_mode & 2) &&
5441 issue_thinkpad_cmos_command(cmos_cmd)) {
5442 res = -EIO;
5443 goto errout;
5444 }
5445 if ((brightness_mode & 1) &&
5446 !acpi_ec_write(TP_EC_BACKLIGHT,
5447 (i + inc) | command_bits)) {
5448 res = -EIO;
5449 goto errout;;
5450 }
5451 }
5452
5453 errout:
5454 mutex_unlock(&brightness_mutex);
5455 return res;
5456 }
5457
5458 /* sysfs backlight class ----------------------------------------------- */
5459
5460 static int brightness_update_status(struct backlight_device *bd)
5461 {
5462 /* it is the backlight class's job (caller) to handle
5463 * EINTR and other errors properly */
5464 return brightness_set(
5465 (bd->props.fb_blank == FB_BLANK_UNBLANK &&
5466 bd->props.power == FB_BLANK_UNBLANK) ?
5467 bd->props.brightness : 0);
5468 }
5469
5470 static int brightness_get(struct backlight_device *bd)
5471 {
5472 int status, res;
5473
5474 res = brightness_get_raw(&status);
5475 if (res < 0)
5476 return 0; /* FIXME: teach backlight about error handling */
5477
5478 return status & TP_EC_BACKLIGHT_LVLMSK;
5479 }
5480
5481 static struct backlight_ops ibm_backlight_data = {
5482 .get_brightness = brightness_get,
5483 .update_status = brightness_update_status,
5484 };
5485
5486 /* --------------------------------------------------------------------- */
5487
5488 static int __init brightness_init(struct ibm_init_struct *iibm)
5489 {
5490 int b;
5491
5492 vdbg_printk(TPACPI_DBG_INIT, "initializing brightness subdriver\n");
5493
5494 mutex_init(&brightness_mutex);
5495
5496 /*
5497 * We always attempt to detect acpi support, so as to switch
5498 * Lenovo Vista BIOS to ACPI brightness mode even if we are not
5499 * going to publish a backlight interface
5500 */
5501 b = tpacpi_check_std_acpi_brightness_support();
5502 if (b > 0) {
5503
5504 if (acpi_video_backlight_support()) {
5505 if (brightness_enable > 1) {
5506 printk(TPACPI_NOTICE
5507 "Standard ACPI backlight interface "
5508 "available, not loading native one.\n");
5509 return 1;
5510 } else if (brightness_enable == 1) {
5511 printk(TPACPI_NOTICE
5512 "Backlight control force enabled, even if standard "
5513 "ACPI backlight interface is available\n");
5514 }
5515 } else {
5516 if (brightness_enable > 1) {
5517 printk(TPACPI_NOTICE
5518 "Standard ACPI backlight interface not "
5519 "available, thinkpad_acpi native "
5520 "brightness control enabled\n");
5521 }
5522 }
5523 }
5524
5525 if (!brightness_enable) {
5526 dbg_printk(TPACPI_DBG_INIT,
5527 "brightness support disabled by "
5528 "module parameter\n");
5529 return 1;
5530 }
5531
5532 if (b > 16) {
5533 printk(TPACPI_ERR
5534 "Unsupported brightness interface, "
5535 "please contact %s\n", TPACPI_MAIL);
5536 return 1;
5537 }
5538 if (b == 16)
5539 tp_features.bright_16levels = 1;
5540
5541 if (!brightness_mode) {
5542 if (thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO)
5543 brightness_mode = 2;
5544 else
5545 brightness_mode = 3;
5546
5547 dbg_printk(TPACPI_DBG_INIT, "selected brightness_mode=%d\n",
5548 brightness_mode);
5549 }
5550
5551 if (brightness_mode > 3)
5552 return -EINVAL;
5553
5554 if (brightness_get_raw(&b) < 0)
5555 return 1;
5556
5557 if (tp_features.bright_16levels)
5558 printk(TPACPI_INFO
5559 "detected a 16-level brightness capable ThinkPad\n");
5560
5561 ibm_backlight_device = backlight_device_register(
5562 TPACPI_BACKLIGHT_DEV_NAME, NULL, NULL,
5563 &ibm_backlight_data);
5564 if (IS_ERR(ibm_backlight_device)) {
5565 printk(TPACPI_ERR "Could not register backlight device\n");
5566 return PTR_ERR(ibm_backlight_device);
5567 }
5568 vdbg_printk(TPACPI_DBG_INIT, "brightness is supported\n");
5569
5570 ibm_backlight_device->props.max_brightness =
5571 (tp_features.bright_16levels)? 15 : 7;
5572 ibm_backlight_device->props.brightness = b & TP_EC_BACKLIGHT_LVLMSK;
5573 backlight_update_status(ibm_backlight_device);
5574
5575 return 0;
5576 }
5577
5578 static void brightness_exit(void)
5579 {
5580 if (ibm_backlight_device) {
5581 vdbg_printk(TPACPI_DBG_EXIT,
5582 "calling backlight_device_unregister()\n");
5583 backlight_device_unregister(ibm_backlight_device);
5584 }
5585 }
5586
5587 static int brightness_read(char *p)
5588 {
5589 int len = 0;
5590 int level;
5591
5592 level = brightness_get(NULL);
5593 if (level < 0) {
5594 len += sprintf(p + len, "level:\t\tunreadable\n");
5595 } else {
5596 len += sprintf(p + len, "level:\t\t%d\n", level);
5597 len += sprintf(p + len, "commands:\tup, down\n");
5598 len += sprintf(p + len, "commands:\tlevel <level>"
5599 " (<level> is 0-%d)\n",
5600 (tp_features.bright_16levels) ? 15 : 7);
5601 }
5602
5603 return len;
5604 }
5605
5606 static int brightness_write(char *buf)
5607 {
5608 int level;
5609 int rc;
5610 char *cmd;
5611 int max_level = (tp_features.bright_16levels) ? 15 : 7;
5612
5613 level = brightness_get(NULL);
5614 if (level < 0)
5615 return level;
5616
5617 while ((cmd = next_cmd(&buf))) {
5618 if (strlencmp(cmd, "up") == 0) {
5619 if (level < max_level)
5620 level++;
5621 } else if (strlencmp(cmd, "down") == 0) {
5622 if (level > 0)
5623 level--;
5624 } else if (sscanf(cmd, "level %d", &level) == 1 &&
5625 level >= 0 && level <= max_level) {
5626 /* new level set */
5627 } else
5628 return -EINVAL;
5629 }
5630
5631 /*
5632 * Now we know what the final level should be, so we try to set it.
5633 * Doing it this way makes the syscall restartable in case of EINTR
5634 */
5635 rc = brightness_set(level);
5636 return (rc == -EINTR)? ERESTARTSYS : rc;
5637 }
5638
5639 static struct ibm_struct brightness_driver_data = {
5640 .name = "brightness",
5641 .read = brightness_read,
5642 .write = brightness_write,
5643 .exit = brightness_exit,
5644 };
5645
5646 /*************************************************************************
5647 * Volume subdriver
5648 */
5649
5650 static int volume_offset = 0x30;
5651
5652 static int volume_read(char *p)
5653 {
5654 int len = 0;
5655 u8 level;
5656
5657 if (!acpi_ec_read(volume_offset, &level)) {
5658 len += sprintf(p + len, "level:\t\tunreadable\n");
5659 } else {
5660 len += sprintf(p + len, "level:\t\t%d\n", level & 0xf);
5661 len += sprintf(p + len, "mute:\t\t%s\n", onoff(level, 6));
5662 len += sprintf(p + len, "commands:\tup, down, mute\n");
5663 len += sprintf(p + len, "commands:\tlevel <level>"
5664 " (<level> is 0-15)\n");
5665 }
5666
5667 return len;
5668 }
5669
5670 static int volume_write(char *buf)
5671 {
5672 int cmos_cmd, inc, i;
5673 u8 level, mute;
5674 int new_level, new_mute;
5675 char *cmd;
5676
5677 while ((cmd = next_cmd(&buf))) {
5678 if (!acpi_ec_read(volume_offset, &level))
5679 return -EIO;
5680 new_mute = mute = level & 0x40;
5681 new_level = level = level & 0xf;
5682
5683 if (strlencmp(cmd, "up") == 0) {
5684 if (mute)
5685 new_mute = 0;
5686 else
5687 new_level = level == 15 ? 15 : level + 1;
5688 } else if (strlencmp(cmd, "down") == 0) {
5689 if (mute)
5690 new_mute = 0;
5691 else
5692 new_level = level == 0 ? 0 : level - 1;
5693 } else if (sscanf(cmd, "level %d", &new_level) == 1 &&
5694 new_level >= 0 && new_level <= 15) {
5695 /* new_level set */
5696 } else if (strlencmp(cmd, "mute") == 0) {
5697 new_mute = 0x40;
5698 } else
5699 return -EINVAL;
5700
5701 if (new_level != level) {
5702 /* mute doesn't change */
5703
5704 cmos_cmd = (new_level > level) ?
5705 TP_CMOS_VOLUME_UP : TP_CMOS_VOLUME_DOWN;
5706 inc = new_level > level ? 1 : -1;
5707
5708 if (mute && (issue_thinkpad_cmos_command(cmos_cmd) ||
5709 !acpi_ec_write(volume_offset, level)))
5710 return -EIO;
5711
5712 for (i = level; i != new_level; i += inc)
5713 if (issue_thinkpad_cmos_command(cmos_cmd) ||
5714 !acpi_ec_write(volume_offset, i + inc))
5715 return -EIO;
5716
5717 if (mute &&
5718 (issue_thinkpad_cmos_command(TP_CMOS_VOLUME_MUTE) ||
5719 !acpi_ec_write(volume_offset, new_level + mute))) {
5720 return -EIO;
5721 }
5722 }
5723
5724 if (new_mute != mute) {
5725 /* level doesn't change */
5726
5727 cmos_cmd = (new_mute) ?
5728 TP_CMOS_VOLUME_MUTE : TP_CMOS_VOLUME_UP;
5729
5730 if (issue_thinkpad_cmos_command(cmos_cmd) ||
5731 !acpi_ec_write(volume_offset, level + new_mute))
5732 return -EIO;
5733 }
5734 }
5735
5736 return 0;
5737 }
5738
5739 static struct ibm_struct volume_driver_data = {
5740 .name = "volume",
5741 .read = volume_read,
5742 .write = volume_write,
5743 };
5744
5745 /*************************************************************************
5746 * Fan subdriver
5747 */
5748
5749 /*
5750 * FAN ACCESS MODES
5751 *
5752 * TPACPI_FAN_RD_ACPI_GFAN:
5753 * ACPI GFAN method: returns fan level
5754 *
5755 * see TPACPI_FAN_WR_ACPI_SFAN
5756 * EC 0x2f (HFSP) not available if GFAN exists
5757 *
5758 * TPACPI_FAN_WR_ACPI_SFAN:
5759 * ACPI SFAN method: sets fan level, 0 (stop) to 7 (max)
5760 *
5761 * EC 0x2f (HFSP) might be available *for reading*, but do not use
5762 * it for writing.
5763 *
5764 * TPACPI_FAN_WR_TPEC:
5765 * ThinkPad EC register 0x2f (HFSP): fan control loop mode
5766 * Supported on almost all ThinkPads
5767 *
5768 * Fan speed changes of any sort (including those caused by the
5769 * disengaged mode) are usually done slowly by the firmware as the
5770 * maximum ammount of fan duty cycle change per second seems to be
5771 * limited.
5772 *
5773 * Reading is not available if GFAN exists.
5774 * Writing is not available if SFAN exists.
5775 *
5776 * Bits
5777 * 7 automatic mode engaged;
5778 * (default operation mode of the ThinkPad)
5779 * fan level is ignored in this mode.
5780 * 6 full speed mode (takes precedence over bit 7);
5781 * not available on all thinkpads. May disable
5782 * the tachometer while the fan controller ramps up
5783 * the speed (which can take up to a few *minutes*).
5784 * Speeds up fan to 100% duty-cycle, which is far above
5785 * the standard RPM levels. It is not impossible that
5786 * it could cause hardware damage.
5787 * 5-3 unused in some models. Extra bits for fan level
5788 * in others, but still useless as all values above
5789 * 7 map to the same speed as level 7 in these models.
5790 * 2-0 fan level (0..7 usually)
5791 * 0x00 = stop
5792 * 0x07 = max (set when temperatures critical)
5793 * Some ThinkPads may have other levels, see
5794 * TPACPI_FAN_WR_ACPI_FANS (X31/X40/X41)
5795 *
5796 * FIRMWARE BUG: on some models, EC 0x2f might not be initialized at
5797 * boot. Apparently the EC does not intialize it, so unless ACPI DSDT
5798 * does so, its initial value is meaningless (0x07).
5799 *
5800 * For firmware bugs, refer to:
5801 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
5802 *
5803 * ----
5804 *
5805 * ThinkPad EC register 0x84 (LSB), 0x85 (MSB):
5806 * Main fan tachometer reading (in RPM)
5807 *
5808 * This register is present on all ThinkPads with a new-style EC, and
5809 * it is known not to be present on the A21m/e, and T22, as there is
5810 * something else in offset 0x84 according to the ACPI DSDT. Other
5811 * ThinkPads from this same time period (and earlier) probably lack the
5812 * tachometer as well.
5813 *
5814 * Unfortunately a lot of ThinkPads with new-style ECs but whose firwmare
5815 * was never fixed by IBM to report the EC firmware version string
5816 * probably support the tachometer (like the early X models), so
5817 * detecting it is quite hard. We need more data to know for sure.
5818 *
5819 * FIRMWARE BUG: always read 0x84 first, otherwise incorrect readings
5820 * might result.
5821 *
5822 * FIRMWARE BUG: may go stale while the EC is switching to full speed
5823 * mode.
5824 *
5825 * For firmware bugs, refer to:
5826 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
5827 *
5828 * TPACPI_FAN_WR_ACPI_FANS:
5829 * ThinkPad X31, X40, X41. Not available in the X60.
5830 *
5831 * FANS ACPI handle: takes three arguments: low speed, medium speed,
5832 * high speed. ACPI DSDT seems to map these three speeds to levels
5833 * as follows: STOP LOW LOW MED MED HIGH HIGH HIGH HIGH
5834 * (this map is stored on FAN0..FAN8 as "0,1,1,2,2,3,3,3,3")
5835 *
5836 * The speeds are stored on handles
5837 * (FANA:FAN9), (FANC:FANB), (FANE:FAND).
5838 *
5839 * There are three default speed sets, acessible as handles:
5840 * FS1L,FS1M,FS1H; FS2L,FS2M,FS2H; FS3L,FS3M,FS3H
5841 *
5842 * ACPI DSDT switches which set is in use depending on various
5843 * factors.
5844 *
5845 * TPACPI_FAN_WR_TPEC is also available and should be used to
5846 * command the fan. The X31/X40/X41 seems to have 8 fan levels,
5847 * but the ACPI tables just mention level 7.
5848 */
5849
5850 enum { /* Fan control constants */
5851 fan_status_offset = 0x2f, /* EC register 0x2f */
5852 fan_rpm_offset = 0x84, /* EC register 0x84: LSB, 0x85 MSB (RPM)
5853 * 0x84 must be read before 0x85 */
5854
5855 TP_EC_FAN_FULLSPEED = 0x40, /* EC fan mode: full speed */
5856 TP_EC_FAN_AUTO = 0x80, /* EC fan mode: auto fan control */
5857
5858 TPACPI_FAN_LAST_LEVEL = 0x100, /* Use cached last-seen fan level */
5859 };
5860
5861 enum fan_status_access_mode {
5862 TPACPI_FAN_NONE = 0, /* No fan status or control */
5863 TPACPI_FAN_RD_ACPI_GFAN, /* Use ACPI GFAN */
5864 TPACPI_FAN_RD_TPEC, /* Use ACPI EC regs 0x2f, 0x84-0x85 */
5865 };
5866
5867 enum fan_control_access_mode {
5868 TPACPI_FAN_WR_NONE = 0, /* No fan control */
5869 TPACPI_FAN_WR_ACPI_SFAN, /* Use ACPI SFAN */
5870 TPACPI_FAN_WR_TPEC, /* Use ACPI EC reg 0x2f */
5871 TPACPI_FAN_WR_ACPI_FANS, /* Use ACPI FANS and EC reg 0x2f */
5872 };
5873
5874 enum fan_control_commands {
5875 TPACPI_FAN_CMD_SPEED = 0x0001, /* speed command */
5876 TPACPI_FAN_CMD_LEVEL = 0x0002, /* level command */
5877 TPACPI_FAN_CMD_ENABLE = 0x0004, /* enable/disable cmd,
5878 * and also watchdog cmd */
5879 };
5880
5881 static int fan_control_allowed;
5882
5883 static enum fan_status_access_mode fan_status_access_mode;
5884 static enum fan_control_access_mode fan_control_access_mode;
5885 static enum fan_control_commands fan_control_commands;
5886
5887 static u8 fan_control_initial_status;
5888 static u8 fan_control_desired_level;
5889 static u8 fan_control_resume_level;
5890 static int fan_watchdog_maxinterval;
5891
5892 static struct mutex fan_mutex;
5893
5894 static void fan_watchdog_fire(struct work_struct *ignored);
5895 static DECLARE_DELAYED_WORK(fan_watchdog_task, fan_watchdog_fire);
5896
5897 TPACPI_HANDLE(fans, ec, "FANS"); /* X31, X40, X41 */
5898 TPACPI_HANDLE(gfan, ec, "GFAN", /* 570 */
5899 "\\FSPD", /* 600e/x, 770e, 770x */
5900 ); /* all others */
5901 TPACPI_HANDLE(sfan, ec, "SFAN", /* 570 */
5902 "JFNS", /* 770x-JL */
5903 ); /* all others */
5904
5905 /*
5906 * Unitialized HFSP quirk: ACPI DSDT and EC fail to initialize the
5907 * HFSP register at boot, so it contains 0x07 but the Thinkpad could
5908 * be in auto mode (0x80).
5909 *
5910 * This is corrected by any write to HFSP either by the driver, or
5911 * by the firmware.
5912 *
5913 * We assume 0x07 really means auto mode while this quirk is active,
5914 * as this is far more likely than the ThinkPad being in level 7,
5915 * which is only used by the firmware during thermal emergencies.
5916 */
5917
5918 static void fan_quirk1_detect(void)
5919 {
5920 /* In some ThinkPads, neither the EC nor the ACPI
5921 * DSDT initialize the HFSP register, and it ends up
5922 * being initially set to 0x07 when it *could* be
5923 * either 0x07 or 0x80.
5924 *
5925 * Enable for TP-1Y (T43), TP-78 (R51e),
5926 * TP-76 (R52), TP-70 (T43, R52), which are known
5927 * to be buggy. */
5928 if (fan_control_initial_status == 0x07) {
5929 switch (thinkpad_id.ec_model) {
5930 case 0x5931: /* TP-1Y */
5931 case 0x3837: /* TP-78 */
5932 case 0x3637: /* TP-76 */
5933 case 0x3037: /* TP-70 */
5934 printk(TPACPI_NOTICE
5935 "fan_init: initial fan status is unknown, "
5936 "assuming it is in auto mode\n");
5937 tp_features.fan_ctrl_status_undef = 1;
5938 ;;
5939 }
5940 }
5941 }
5942
5943 static void fan_quirk1_handle(u8 *fan_status)
5944 {
5945 if (unlikely(tp_features.fan_ctrl_status_undef)) {
5946 if (*fan_status != fan_control_initial_status) {
5947 /* something changed the HFSP regisnter since
5948 * driver init time, so it is not undefined
5949 * anymore */
5950 tp_features.fan_ctrl_status_undef = 0;
5951 } else {
5952 /* Return most likely status. In fact, it
5953 * might be the only possible status */
5954 *fan_status = TP_EC_FAN_AUTO;
5955 }
5956 }
5957 }
5958
5959 /*
5960 * Call with fan_mutex held
5961 */
5962 static void fan_update_desired_level(u8 status)
5963 {
5964 if ((status &
5965 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
5966 if (status > 7)
5967 fan_control_desired_level = 7;
5968 else
5969 fan_control_desired_level = status;
5970 }
5971 }
5972
5973 static int fan_get_status(u8 *status)
5974 {
5975 u8 s;
5976
5977 /* TODO:
5978 * Add TPACPI_FAN_RD_ACPI_FANS ? */
5979
5980 switch (fan_status_access_mode) {
5981 case TPACPI_FAN_RD_ACPI_GFAN:
5982 /* 570, 600e/x, 770e, 770x */
5983
5984 if (unlikely(!acpi_evalf(gfan_handle, &s, NULL, "d")))
5985 return -EIO;
5986
5987 if (likely(status))
5988 *status = s & 0x07;
5989
5990 break;
5991
5992 case TPACPI_FAN_RD_TPEC:
5993 /* all except 570, 600e/x, 770e, 770x */
5994 if (unlikely(!acpi_ec_read(fan_status_offset, &s)))
5995 return -EIO;
5996
5997 if (likely(status)) {
5998 *status = s;
5999 fan_quirk1_handle(status);
6000 }
6001
6002 break;
6003
6004 default:
6005 return -ENXIO;
6006 }
6007
6008 return 0;
6009 }
6010
6011 static int fan_get_status_safe(u8 *status)
6012 {
6013 int rc;
6014 u8 s;
6015
6016 if (mutex_lock_killable(&fan_mutex))
6017 return -ERESTARTSYS;
6018 rc = fan_get_status(&s);
6019 if (!rc)
6020 fan_update_desired_level(s);
6021 mutex_unlock(&fan_mutex);
6022
6023 if (status)
6024 *status = s;
6025
6026 return rc;
6027 }
6028
6029 static int fan_get_speed(unsigned int *speed)
6030 {
6031 u8 hi, lo;
6032
6033 switch (fan_status_access_mode) {
6034 case TPACPI_FAN_RD_TPEC:
6035 /* all except 570, 600e/x, 770e, 770x */
6036 if (unlikely(!acpi_ec_read(fan_rpm_offset, &lo) ||
6037 !acpi_ec_read(fan_rpm_offset + 1, &hi)))
6038 return -EIO;
6039
6040 if (likely(speed))
6041 *speed = (hi << 8) | lo;
6042
6043 break;
6044
6045 default:
6046 return -ENXIO;
6047 }
6048
6049 return 0;
6050 }
6051
6052 static int fan_set_level(int level)
6053 {
6054 if (!fan_control_allowed)
6055 return -EPERM;
6056
6057 switch (fan_control_access_mode) {
6058 case TPACPI_FAN_WR_ACPI_SFAN:
6059 if (level >= 0 && level <= 7) {
6060 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", level))
6061 return -EIO;
6062 } else
6063 return -EINVAL;
6064 break;
6065
6066 case TPACPI_FAN_WR_ACPI_FANS:
6067 case TPACPI_FAN_WR_TPEC:
6068 if (!(level & TP_EC_FAN_AUTO) &&
6069 !(level & TP_EC_FAN_FULLSPEED) &&
6070 ((level < 0) || (level > 7)))
6071 return -EINVAL;
6072
6073 /* safety net should the EC not support AUTO
6074 * or FULLSPEED mode bits and just ignore them */
6075 if (level & TP_EC_FAN_FULLSPEED)
6076 level |= 7; /* safety min speed 7 */
6077 else if (level & TP_EC_FAN_AUTO)
6078 level |= 4; /* safety min speed 4 */
6079
6080 if (!acpi_ec_write(fan_status_offset, level))
6081 return -EIO;
6082 else
6083 tp_features.fan_ctrl_status_undef = 0;
6084 break;
6085
6086 default:
6087 return -ENXIO;
6088 }
6089 return 0;
6090 }
6091
6092 static int fan_set_level_safe(int level)
6093 {
6094 int rc;
6095
6096 if (!fan_control_allowed)
6097 return -EPERM;
6098
6099 if (mutex_lock_killable(&fan_mutex))
6100 return -ERESTARTSYS;
6101
6102 if (level == TPACPI_FAN_LAST_LEVEL)
6103 level = fan_control_desired_level;
6104
6105 rc = fan_set_level(level);
6106 if (!rc)
6107 fan_update_desired_level(level);
6108
6109 mutex_unlock(&fan_mutex);
6110 return rc;
6111 }
6112
6113 static int fan_set_enable(void)
6114 {
6115 u8 s;
6116 int rc;
6117
6118 if (!fan_control_allowed)
6119 return -EPERM;
6120
6121 if (mutex_lock_killable(&fan_mutex))
6122 return -ERESTARTSYS;
6123
6124 switch (fan_control_access_mode) {
6125 case TPACPI_FAN_WR_ACPI_FANS:
6126 case TPACPI_FAN_WR_TPEC:
6127 rc = fan_get_status(&s);
6128 if (rc < 0)
6129 break;
6130
6131 /* Don't go out of emergency fan mode */
6132 if (s != 7) {
6133 s &= 0x07;
6134 s |= TP_EC_FAN_AUTO | 4; /* min fan speed 4 */
6135 }
6136
6137 if (!acpi_ec_write(fan_status_offset, s))
6138 rc = -EIO;
6139 else {
6140 tp_features.fan_ctrl_status_undef = 0;
6141 rc = 0;
6142 }
6143 break;
6144
6145 case TPACPI_FAN_WR_ACPI_SFAN:
6146 rc = fan_get_status(&s);
6147 if (rc < 0)
6148 break;
6149
6150 s &= 0x07;
6151
6152 /* Set fan to at least level 4 */
6153 s |= 4;
6154
6155 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", s))
6156 rc = -EIO;
6157 else
6158 rc = 0;
6159 break;
6160
6161 default:
6162 rc = -ENXIO;
6163 }
6164
6165 mutex_unlock(&fan_mutex);
6166 return rc;
6167 }
6168
6169 static int fan_set_disable(void)
6170 {
6171 int rc;
6172
6173 if (!fan_control_allowed)
6174 return -EPERM;
6175
6176 if (mutex_lock_killable(&fan_mutex))
6177 return -ERESTARTSYS;
6178
6179 rc = 0;
6180 switch (fan_control_access_mode) {
6181 case TPACPI_FAN_WR_ACPI_FANS:
6182 case TPACPI_FAN_WR_TPEC:
6183 if (!acpi_ec_write(fan_status_offset, 0x00))
6184 rc = -EIO;
6185 else {
6186 fan_control_desired_level = 0;
6187 tp_features.fan_ctrl_status_undef = 0;
6188 }
6189 break;
6190
6191 case TPACPI_FAN_WR_ACPI_SFAN:
6192 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", 0x00))
6193 rc = -EIO;
6194 else
6195 fan_control_desired_level = 0;
6196 break;
6197
6198 default:
6199 rc = -ENXIO;
6200 }
6201
6202
6203 mutex_unlock(&fan_mutex);
6204 return rc;
6205 }
6206
6207 static int fan_set_speed(int speed)
6208 {
6209 int rc;
6210
6211 if (!fan_control_allowed)
6212 return -EPERM;
6213
6214 if (mutex_lock_killable(&fan_mutex))
6215 return -ERESTARTSYS;
6216
6217 rc = 0;
6218 switch (fan_control_access_mode) {
6219 case TPACPI_FAN_WR_ACPI_FANS:
6220 if (speed >= 0 && speed <= 65535) {
6221 if (!acpi_evalf(fans_handle, NULL, NULL, "vddd",
6222 speed, speed, speed))
6223 rc = -EIO;
6224 } else
6225 rc = -EINVAL;
6226 break;
6227
6228 default:
6229 rc = -ENXIO;
6230 }
6231
6232 mutex_unlock(&fan_mutex);
6233 return rc;
6234 }
6235
6236 static void fan_watchdog_reset(void)
6237 {
6238 static int fan_watchdog_active;
6239
6240 if (fan_control_access_mode == TPACPI_FAN_WR_NONE)
6241 return;
6242
6243 if (fan_watchdog_active)
6244 cancel_delayed_work(&fan_watchdog_task);
6245
6246 if (fan_watchdog_maxinterval > 0 &&
6247 tpacpi_lifecycle != TPACPI_LIFE_EXITING) {
6248 fan_watchdog_active = 1;
6249 if (!queue_delayed_work(tpacpi_wq, &fan_watchdog_task,
6250 msecs_to_jiffies(fan_watchdog_maxinterval
6251 * 1000))) {
6252 printk(TPACPI_ERR
6253 "failed to queue the fan watchdog, "
6254 "watchdog will not trigger\n");
6255 }
6256 } else
6257 fan_watchdog_active = 0;
6258 }
6259
6260 static void fan_watchdog_fire(struct work_struct *ignored)
6261 {
6262 int rc;
6263
6264 if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
6265 return;
6266
6267 printk(TPACPI_NOTICE "fan watchdog: enabling fan\n");
6268 rc = fan_set_enable();
6269 if (rc < 0) {
6270 printk(TPACPI_ERR "fan watchdog: error %d while enabling fan, "
6271 "will try again later...\n", -rc);
6272 /* reschedule for later */
6273 fan_watchdog_reset();
6274 }
6275 }
6276
6277 /*
6278 * SYSFS fan layout: hwmon compatible (device)
6279 *
6280 * pwm*_enable:
6281 * 0: "disengaged" mode
6282 * 1: manual mode
6283 * 2: native EC "auto" mode (recommended, hardware default)
6284 *
6285 * pwm*: set speed in manual mode, ignored otherwise.
6286 * 0 is level 0; 255 is level 7. Intermediate points done with linear
6287 * interpolation.
6288 *
6289 * fan*_input: tachometer reading, RPM
6290 *
6291 *
6292 * SYSFS fan layout: extensions
6293 *
6294 * fan_watchdog (driver):
6295 * fan watchdog interval in seconds, 0 disables (default), max 120
6296 */
6297
6298 /* sysfs fan pwm1_enable ----------------------------------------------- */
6299 static ssize_t fan_pwm1_enable_show(struct device *dev,
6300 struct device_attribute *attr,
6301 char *buf)
6302 {
6303 int res, mode;
6304 u8 status;
6305
6306 res = fan_get_status_safe(&status);
6307 if (res)
6308 return res;
6309
6310 if (status & TP_EC_FAN_FULLSPEED) {
6311 mode = 0;
6312 } else if (status & TP_EC_FAN_AUTO) {
6313 mode = 2;
6314 } else
6315 mode = 1;
6316
6317 return snprintf(buf, PAGE_SIZE, "%d\n", mode);
6318 }
6319
6320 static ssize_t fan_pwm1_enable_store(struct device *dev,
6321 struct device_attribute *attr,
6322 const char *buf, size_t count)
6323 {
6324 unsigned long t;
6325 int res, level;
6326
6327 if (parse_strtoul(buf, 2, &t))
6328 return -EINVAL;
6329
6330 switch (t) {
6331 case 0:
6332 level = TP_EC_FAN_FULLSPEED;
6333 break;
6334 case 1:
6335 level = TPACPI_FAN_LAST_LEVEL;
6336 break;
6337 case 2:
6338 level = TP_EC_FAN_AUTO;
6339 break;
6340 case 3:
6341 /* reserved for software-controlled auto mode */
6342 return -ENOSYS;
6343 default:
6344 return -EINVAL;
6345 }
6346
6347 res = fan_set_level_safe(level);
6348 if (res == -ENXIO)
6349 return -EINVAL;
6350 else if (res < 0)
6351 return res;
6352
6353 fan_watchdog_reset();
6354
6355 return count;
6356 }
6357
6358 static struct device_attribute dev_attr_fan_pwm1_enable =
6359 __ATTR(pwm1_enable, S_IWUSR | S_IRUGO,
6360 fan_pwm1_enable_show, fan_pwm1_enable_store);
6361
6362 /* sysfs fan pwm1 ------------------------------------------------------ */
6363 static ssize_t fan_pwm1_show(struct device *dev,
6364 struct device_attribute *attr,
6365 char *buf)
6366 {
6367 int res;
6368 u8 status;
6369
6370 res = fan_get_status_safe(&status);
6371 if (res)
6372 return res;
6373
6374 if ((status &
6375 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) != 0)
6376 status = fan_control_desired_level;
6377
6378 if (status > 7)
6379 status = 7;
6380
6381 return snprintf(buf, PAGE_SIZE, "%u\n", (status * 255) / 7);
6382 }
6383
6384 static ssize_t fan_pwm1_store(struct device *dev,
6385 struct device_attribute *attr,
6386 const char *buf, size_t count)
6387 {
6388 unsigned long s;
6389 int rc;
6390 u8 status, newlevel;
6391
6392 if (parse_strtoul(buf, 255, &s))
6393 return -EINVAL;
6394
6395 /* scale down from 0-255 to 0-7 */
6396 newlevel = (s >> 5) & 0x07;
6397
6398 if (mutex_lock_killable(&fan_mutex))
6399 return -ERESTARTSYS;
6400
6401 rc = fan_get_status(&status);
6402 if (!rc && (status &
6403 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
6404 rc = fan_set_level(newlevel);
6405 if (rc == -ENXIO)
6406 rc = -EINVAL;
6407 else if (!rc) {
6408 fan_update_desired_level(newlevel);
6409 fan_watchdog_reset();
6410 }
6411 }
6412
6413 mutex_unlock(&fan_mutex);
6414 return (rc)? rc : count;
6415 }
6416
6417 static struct device_attribute dev_attr_fan_pwm1 =
6418 __ATTR(pwm1, S_IWUSR | S_IRUGO,
6419 fan_pwm1_show, fan_pwm1_store);
6420
6421 /* sysfs fan fan1_input ------------------------------------------------ */
6422 static ssize_t fan_fan1_input_show(struct device *dev,
6423 struct device_attribute *attr,
6424 char *buf)
6425 {
6426 int res;
6427 unsigned int speed;
6428
6429 res = fan_get_speed(&speed);
6430 if (res < 0)
6431 return res;
6432
6433 return snprintf(buf, PAGE_SIZE, "%u\n", speed);
6434 }
6435
6436 static struct device_attribute dev_attr_fan_fan1_input =
6437 __ATTR(fan1_input, S_IRUGO,
6438 fan_fan1_input_show, NULL);
6439
6440 /* sysfs fan fan_watchdog (hwmon driver) ------------------------------- */
6441 static ssize_t fan_fan_watchdog_show(struct device_driver *drv,
6442 char *buf)
6443 {
6444 return snprintf(buf, PAGE_SIZE, "%u\n", fan_watchdog_maxinterval);
6445 }
6446
6447 static ssize_t fan_fan_watchdog_store(struct device_driver *drv,
6448 const char *buf, size_t count)
6449 {
6450 unsigned long t;
6451
6452 if (parse_strtoul(buf, 120, &t))
6453 return -EINVAL;
6454
6455 if (!fan_control_allowed)
6456 return -EPERM;
6457
6458 fan_watchdog_maxinterval = t;
6459 fan_watchdog_reset();
6460
6461 return count;
6462 }
6463
6464 static DRIVER_ATTR(fan_watchdog, S_IWUSR | S_IRUGO,
6465 fan_fan_watchdog_show, fan_fan_watchdog_store);
6466
6467 /* --------------------------------------------------------------------- */
6468 static struct attribute *fan_attributes[] = {
6469 &dev_attr_fan_pwm1_enable.attr, &dev_attr_fan_pwm1.attr,
6470 &dev_attr_fan_fan1_input.attr,
6471 NULL
6472 };
6473
6474 static const struct attribute_group fan_attr_group = {
6475 .attrs = fan_attributes,
6476 };
6477
6478 static int __init fan_init(struct ibm_init_struct *iibm)
6479 {
6480 int rc;
6481
6482 vdbg_printk(TPACPI_DBG_INIT, "initializing fan subdriver\n");
6483
6484 mutex_init(&fan_mutex);
6485 fan_status_access_mode = TPACPI_FAN_NONE;
6486 fan_control_access_mode = TPACPI_FAN_WR_NONE;
6487 fan_control_commands = 0;
6488 fan_watchdog_maxinterval = 0;
6489 tp_features.fan_ctrl_status_undef = 0;
6490 fan_control_desired_level = 7;
6491
6492 TPACPI_ACPIHANDLE_INIT(fans);
6493 TPACPI_ACPIHANDLE_INIT(gfan);
6494 TPACPI_ACPIHANDLE_INIT(sfan);
6495
6496 if (gfan_handle) {
6497 /* 570, 600e/x, 770e, 770x */
6498 fan_status_access_mode = TPACPI_FAN_RD_ACPI_GFAN;
6499 } else {
6500 /* all other ThinkPads: note that even old-style
6501 * ThinkPad ECs supports the fan control register */
6502 if (likely(acpi_ec_read(fan_status_offset,
6503 &fan_control_initial_status))) {
6504 fan_status_access_mode = TPACPI_FAN_RD_TPEC;
6505 fan_quirk1_detect();
6506 } else {
6507 printk(TPACPI_ERR
6508 "ThinkPad ACPI EC access misbehaving, "
6509 "fan status and control unavailable\n");
6510 return 1;
6511 }
6512 }
6513
6514 if (sfan_handle) {
6515 /* 570, 770x-JL */
6516 fan_control_access_mode = TPACPI_FAN_WR_ACPI_SFAN;
6517 fan_control_commands |=
6518 TPACPI_FAN_CMD_LEVEL | TPACPI_FAN_CMD_ENABLE;
6519 } else {
6520 if (!gfan_handle) {
6521 /* gfan without sfan means no fan control */
6522 /* all other models implement TP EC 0x2f control */
6523
6524 if (fans_handle) {
6525 /* X31, X40, X41 */
6526 fan_control_access_mode =
6527 TPACPI_FAN_WR_ACPI_FANS;
6528 fan_control_commands |=
6529 TPACPI_FAN_CMD_SPEED |
6530 TPACPI_FAN_CMD_LEVEL |
6531 TPACPI_FAN_CMD_ENABLE;
6532 } else {
6533 fan_control_access_mode = TPACPI_FAN_WR_TPEC;
6534 fan_control_commands |=
6535 TPACPI_FAN_CMD_LEVEL |
6536 TPACPI_FAN_CMD_ENABLE;
6537 }
6538 }
6539 }
6540
6541 vdbg_printk(TPACPI_DBG_INIT, "fan is %s, modes %d, %d\n",
6542 str_supported(fan_status_access_mode != TPACPI_FAN_NONE ||
6543 fan_control_access_mode != TPACPI_FAN_WR_NONE),
6544 fan_status_access_mode, fan_control_access_mode);
6545
6546 /* fan control master switch */
6547 if (!fan_control_allowed) {
6548 fan_control_access_mode = TPACPI_FAN_WR_NONE;
6549 fan_control_commands = 0;
6550 dbg_printk(TPACPI_DBG_INIT,
6551 "fan control features disabled by parameter\n");
6552 }
6553
6554 /* update fan_control_desired_level */
6555 if (fan_status_access_mode != TPACPI_FAN_NONE)
6556 fan_get_status_safe(NULL);
6557
6558 if (fan_status_access_mode != TPACPI_FAN_NONE ||
6559 fan_control_access_mode != TPACPI_FAN_WR_NONE) {
6560 rc = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
6561 &fan_attr_group);
6562 if (rc < 0)
6563 return rc;
6564
6565 rc = driver_create_file(&tpacpi_hwmon_pdriver.driver,
6566 &driver_attr_fan_watchdog);
6567 if (rc < 0) {
6568 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
6569 &fan_attr_group);
6570 return rc;
6571 }
6572 return 0;
6573 } else
6574 return 1;
6575 }
6576
6577 static void fan_exit(void)
6578 {
6579 vdbg_printk(TPACPI_DBG_EXIT,
6580 "cancelling any pending fan watchdog tasks\n");
6581
6582 /* FIXME: can we really do this unconditionally? */
6583 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj, &fan_attr_group);
6584 driver_remove_file(&tpacpi_hwmon_pdriver.driver,
6585 &driver_attr_fan_watchdog);
6586
6587 cancel_delayed_work(&fan_watchdog_task);
6588 flush_workqueue(tpacpi_wq);
6589 }
6590
6591 static void fan_suspend(pm_message_t state)
6592 {
6593 int rc;
6594
6595 if (!fan_control_allowed)
6596 return;
6597
6598 /* Store fan status in cache */
6599 fan_control_resume_level = 0;
6600 rc = fan_get_status_safe(&fan_control_resume_level);
6601 if (rc < 0)
6602 printk(TPACPI_NOTICE
6603 "failed to read fan level for later "
6604 "restore during resume: %d\n", rc);
6605
6606 /* if it is undefined, don't attempt to restore it.
6607 * KEEP THIS LAST */
6608 if (tp_features.fan_ctrl_status_undef)
6609 fan_control_resume_level = 0;
6610 }
6611
6612 static void fan_resume(void)
6613 {
6614 u8 current_level = 7;
6615 bool do_set = false;
6616 int rc;
6617
6618 /* DSDT *always* updates status on resume */
6619 tp_features.fan_ctrl_status_undef = 0;
6620
6621 if (!fan_control_allowed ||
6622 !fan_control_resume_level ||
6623 (fan_get_status_safe(&current_level) < 0))
6624 return;
6625
6626 switch (fan_control_access_mode) {
6627 case TPACPI_FAN_WR_ACPI_SFAN:
6628 /* never decrease fan level */
6629 do_set = (fan_control_resume_level > current_level);
6630 break;
6631 case TPACPI_FAN_WR_ACPI_FANS:
6632 case TPACPI_FAN_WR_TPEC:
6633 /* never decrease fan level, scale is:
6634 * TP_EC_FAN_FULLSPEED > 7 >= TP_EC_FAN_AUTO
6635 *
6636 * We expect the firmware to set either 7 or AUTO, but we
6637 * handle FULLSPEED out of paranoia.
6638 *
6639 * So, we can safely only restore FULLSPEED or 7, anything
6640 * else could slow the fan. Restoring AUTO is useless, at
6641 * best that's exactly what the DSDT already set (it is the
6642 * slower it uses).
6643 *
6644 * Always keep in mind that the DSDT *will* have set the
6645 * fans to what the vendor supposes is the best level. We
6646 * muck with it only to speed the fan up.
6647 */
6648 if (fan_control_resume_level != 7 &&
6649 !(fan_control_resume_level & TP_EC_FAN_FULLSPEED))
6650 return;
6651 else
6652 do_set = !(current_level & TP_EC_FAN_FULLSPEED) &&
6653 (current_level != fan_control_resume_level);
6654 break;
6655 default:
6656 return;
6657 }
6658 if (do_set) {
6659 printk(TPACPI_NOTICE
6660 "restoring fan level to 0x%02x\n",
6661 fan_control_resume_level);
6662 rc = fan_set_level_safe(fan_control_resume_level);
6663 if (rc < 0)
6664 printk(TPACPI_NOTICE
6665 "failed to restore fan level: %d\n", rc);
6666 }
6667 }
6668
6669 static int fan_read(char *p)
6670 {
6671 int len = 0;
6672 int rc;
6673 u8 status;
6674 unsigned int speed = 0;
6675
6676 switch (fan_status_access_mode) {
6677 case TPACPI_FAN_RD_ACPI_GFAN:
6678 /* 570, 600e/x, 770e, 770x */
6679 rc = fan_get_status_safe(&status);
6680 if (rc < 0)
6681 return rc;
6682
6683 len += sprintf(p + len, "status:\t\t%s\n"
6684 "level:\t\t%d\n",
6685 (status != 0) ? "enabled" : "disabled", status);
6686 break;
6687
6688 case TPACPI_FAN_RD_TPEC:
6689 /* all except 570, 600e/x, 770e, 770x */
6690 rc = fan_get_status_safe(&status);
6691 if (rc < 0)
6692 return rc;
6693
6694 len += sprintf(p + len, "status:\t\t%s\n",
6695 (status != 0) ? "enabled" : "disabled");
6696
6697 rc = fan_get_speed(&speed);
6698 if (rc < 0)
6699 return rc;
6700
6701 len += sprintf(p + len, "speed:\t\t%d\n", speed);
6702
6703 if (status & TP_EC_FAN_FULLSPEED)
6704 /* Disengaged mode takes precedence */
6705 len += sprintf(p + len, "level:\t\tdisengaged\n");
6706 else if (status & TP_EC_FAN_AUTO)
6707 len += sprintf(p + len, "level:\t\tauto\n");
6708 else
6709 len += sprintf(p + len, "level:\t\t%d\n", status);
6710 break;
6711
6712 case TPACPI_FAN_NONE:
6713 default:
6714 len += sprintf(p + len, "status:\t\tnot supported\n");
6715 }
6716
6717 if (fan_control_commands & TPACPI_FAN_CMD_LEVEL) {
6718 len += sprintf(p + len, "commands:\tlevel <level>");
6719
6720 switch (fan_control_access_mode) {
6721 case TPACPI_FAN_WR_ACPI_SFAN:
6722 len += sprintf(p + len, " (<level> is 0-7)\n");
6723 break;
6724
6725 default:
6726 len += sprintf(p + len, " (<level> is 0-7, "
6727 "auto, disengaged, full-speed)\n");
6728 break;
6729 }
6730 }
6731
6732 if (fan_control_commands & TPACPI_FAN_CMD_ENABLE)
6733 len += sprintf(p + len, "commands:\tenable, disable\n"
6734 "commands:\twatchdog <timeout> (<timeout> "
6735 "is 0 (off), 1-120 (seconds))\n");
6736
6737 if (fan_control_commands & TPACPI_FAN_CMD_SPEED)
6738 len += sprintf(p + len, "commands:\tspeed <speed>"
6739 " (<speed> is 0-65535)\n");
6740
6741 return len;
6742 }
6743
6744 static int fan_write_cmd_level(const char *cmd, int *rc)
6745 {
6746 int level;
6747
6748 if (strlencmp(cmd, "level auto") == 0)
6749 level = TP_EC_FAN_AUTO;
6750 else if ((strlencmp(cmd, "level disengaged") == 0) |
6751 (strlencmp(cmd, "level full-speed") == 0))
6752 level = TP_EC_FAN_FULLSPEED;
6753 else if (sscanf(cmd, "level %d", &level) != 1)
6754 return 0;
6755
6756 *rc = fan_set_level_safe(level);
6757 if (*rc == -ENXIO)
6758 printk(TPACPI_ERR "level command accepted for unsupported "
6759 "access mode %d", fan_control_access_mode);
6760
6761 return 1;
6762 }
6763
6764 static int fan_write_cmd_enable(const char *cmd, int *rc)
6765 {
6766 if (strlencmp(cmd, "enable") != 0)
6767 return 0;
6768
6769 *rc = fan_set_enable();
6770 if (*rc == -ENXIO)
6771 printk(TPACPI_ERR "enable command accepted for unsupported "
6772 "access mode %d", fan_control_access_mode);
6773
6774 return 1;
6775 }
6776
6777 static int fan_write_cmd_disable(const char *cmd, int *rc)
6778 {
6779 if (strlencmp(cmd, "disable") != 0)
6780 return 0;
6781
6782 *rc = fan_set_disable();
6783 if (*rc == -ENXIO)
6784 printk(TPACPI_ERR "disable command accepted for unsupported "
6785 "access mode %d", fan_control_access_mode);
6786
6787 return 1;
6788 }
6789
6790 static int fan_write_cmd_speed(const char *cmd, int *rc)
6791 {
6792 int speed;
6793
6794 /* TODO:
6795 * Support speed <low> <medium> <high> ? */
6796
6797 if (sscanf(cmd, "speed %d", &speed) != 1)
6798 return 0;
6799
6800 *rc = fan_set_speed(speed);
6801 if (*rc == -ENXIO)
6802 printk(TPACPI_ERR "speed command accepted for unsupported "
6803 "access mode %d", fan_control_access_mode);
6804
6805 return 1;
6806 }
6807
6808 static int fan_write_cmd_watchdog(const char *cmd, int *rc)
6809 {
6810 int interval;
6811
6812 if (sscanf(cmd, "watchdog %d", &interval) != 1)
6813 return 0;
6814
6815 if (interval < 0 || interval > 120)
6816 *rc = -EINVAL;
6817 else
6818 fan_watchdog_maxinterval = interval;
6819
6820 return 1;
6821 }
6822
6823 static int fan_write(char *buf)
6824 {
6825 char *cmd;
6826 int rc = 0;
6827
6828 while (!rc && (cmd = next_cmd(&buf))) {
6829 if (!((fan_control_commands & TPACPI_FAN_CMD_LEVEL) &&
6830 fan_write_cmd_level(cmd, &rc)) &&
6831 !((fan_control_commands & TPACPI_FAN_CMD_ENABLE) &&
6832 (fan_write_cmd_enable(cmd, &rc) ||
6833 fan_write_cmd_disable(cmd, &rc) ||
6834 fan_write_cmd_watchdog(cmd, &rc))) &&
6835 !((fan_control_commands & TPACPI_FAN_CMD_SPEED) &&
6836 fan_write_cmd_speed(cmd, &rc))
6837 )
6838 rc = -EINVAL;
6839 else if (!rc)
6840 fan_watchdog_reset();
6841 }
6842
6843 return rc;
6844 }
6845
6846 static struct ibm_struct fan_driver_data = {
6847 .name = "fan",
6848 .read = fan_read,
6849 .write = fan_write,
6850 .exit = fan_exit,
6851 .suspend = fan_suspend,
6852 .resume = fan_resume,
6853 };
6854
6855 /****************************************************************************
6856 ****************************************************************************
6857 *
6858 * Infrastructure
6859 *
6860 ****************************************************************************
6861 ****************************************************************************/
6862
6863 /* sysfs name ---------------------------------------------------------- */
6864 static ssize_t thinkpad_acpi_pdev_name_show(struct device *dev,
6865 struct device_attribute *attr,
6866 char *buf)
6867 {
6868 return snprintf(buf, PAGE_SIZE, "%s\n", TPACPI_NAME);
6869 }
6870
6871 static struct device_attribute dev_attr_thinkpad_acpi_pdev_name =
6872 __ATTR(name, S_IRUGO, thinkpad_acpi_pdev_name_show, NULL);
6873
6874 /* --------------------------------------------------------------------- */
6875
6876 /* /proc support */
6877 static struct proc_dir_entry *proc_dir;
6878
6879 /*
6880 * Module and infrastructure proble, init and exit handling
6881 */
6882
6883 static int force_load;
6884
6885 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
6886 static const char * __init str_supported(int is_supported)
6887 {
6888 static char text_unsupported[] __initdata = "not supported";
6889
6890 return (is_supported)? &text_unsupported[4] : &text_unsupported[0];
6891 }
6892 #endif /* CONFIG_THINKPAD_ACPI_DEBUG */
6893
6894 static void ibm_exit(struct ibm_struct *ibm)
6895 {
6896 dbg_printk(TPACPI_DBG_EXIT, "removing %s\n", ibm->name);
6897
6898 list_del_init(&ibm->all_drivers);
6899
6900 if (ibm->flags.acpi_notify_installed) {
6901 dbg_printk(TPACPI_DBG_EXIT,
6902 "%s: acpi_remove_notify_handler\n", ibm->name);
6903 BUG_ON(!ibm->acpi);
6904 acpi_remove_notify_handler(*ibm->acpi->handle,
6905 ibm->acpi->type,
6906 dispatch_acpi_notify);
6907 ibm->flags.acpi_notify_installed = 0;
6908 ibm->flags.acpi_notify_installed = 0;
6909 }
6910
6911 if (ibm->flags.proc_created) {
6912 dbg_printk(TPACPI_DBG_EXIT,
6913 "%s: remove_proc_entry\n", ibm->name);
6914 remove_proc_entry(ibm->name, proc_dir);
6915 ibm->flags.proc_created = 0;
6916 }
6917
6918 if (ibm->flags.acpi_driver_registered) {
6919 dbg_printk(TPACPI_DBG_EXIT,
6920 "%s: acpi_bus_unregister_driver\n", ibm->name);
6921 BUG_ON(!ibm->acpi);
6922 acpi_bus_unregister_driver(ibm->acpi->driver);
6923 kfree(ibm->acpi->driver);
6924 ibm->acpi->driver = NULL;
6925 ibm->flags.acpi_driver_registered = 0;
6926 }
6927
6928 if (ibm->flags.init_called && ibm->exit) {
6929 ibm->exit();
6930 ibm->flags.init_called = 0;
6931 }
6932
6933 dbg_printk(TPACPI_DBG_INIT, "finished removing %s\n", ibm->name);
6934 }
6935
6936 static int __init ibm_init(struct ibm_init_struct *iibm)
6937 {
6938 int ret;
6939 struct ibm_struct *ibm = iibm->data;
6940 struct proc_dir_entry *entry;
6941
6942 BUG_ON(ibm == NULL);
6943
6944 INIT_LIST_HEAD(&ibm->all_drivers);
6945
6946 if (ibm->flags.experimental && !experimental)
6947 return 0;
6948
6949 dbg_printk(TPACPI_DBG_INIT,
6950 "probing for %s\n", ibm->name);
6951
6952 if (iibm->init) {
6953 ret = iibm->init(iibm);
6954 if (ret > 0)
6955 return 0; /* probe failed */
6956 if (ret)
6957 return ret;
6958
6959 ibm->flags.init_called = 1;
6960 }
6961
6962 if (ibm->acpi) {
6963 if (ibm->acpi->hid) {
6964 ret = register_tpacpi_subdriver(ibm);
6965 if (ret)
6966 goto err_out;
6967 }
6968
6969 if (ibm->acpi->notify) {
6970 ret = setup_acpi_notify(ibm);
6971 if (ret == -ENODEV) {
6972 printk(TPACPI_NOTICE "disabling subdriver %s\n",
6973 ibm->name);
6974 ret = 0;
6975 goto err_out;
6976 }
6977 if (ret < 0)
6978 goto err_out;
6979 }
6980 }
6981
6982 dbg_printk(TPACPI_DBG_INIT,
6983 "%s installed\n", ibm->name);
6984
6985 if (ibm->read) {
6986 entry = create_proc_entry(ibm->name,
6987 S_IFREG | S_IRUGO | S_IWUSR,
6988 proc_dir);
6989 if (!entry) {
6990 printk(TPACPI_ERR "unable to create proc entry %s\n",
6991 ibm->name);
6992 ret = -ENODEV;
6993 goto err_out;
6994 }
6995 entry->owner = THIS_MODULE;
6996 entry->data = ibm;
6997 entry->read_proc = &dispatch_procfs_read;
6998 if (ibm->write)
6999 entry->write_proc = &dispatch_procfs_write;
7000 ibm->flags.proc_created = 1;
7001 }
7002
7003 list_add_tail(&ibm->all_drivers, &tpacpi_all_drivers);
7004
7005 return 0;
7006
7007 err_out:
7008 dbg_printk(TPACPI_DBG_INIT,
7009 "%s: at error exit path with result %d\n",
7010 ibm->name, ret);
7011
7012 ibm_exit(ibm);
7013 return (ret < 0)? ret : 0;
7014 }
7015
7016 /* Probing */
7017
7018 /* returns 0 - probe ok, or < 0 - probe error.
7019 * Probe ok doesn't mean thinkpad found.
7020 * On error, kfree() cleanup on tp->* is not performed, caller must do it */
7021 static int __must_check __init get_thinkpad_model_data(
7022 struct thinkpad_id_data *tp)
7023 {
7024 const struct dmi_device *dev = NULL;
7025 char ec_fw_string[18];
7026 char const *s;
7027
7028 if (!tp)
7029 return -EINVAL;
7030
7031 memset(tp, 0, sizeof(*tp));
7032
7033 if (dmi_name_in_vendors("IBM"))
7034 tp->vendor = PCI_VENDOR_ID_IBM;
7035 else if (dmi_name_in_vendors("LENOVO"))
7036 tp->vendor = PCI_VENDOR_ID_LENOVO;
7037 else
7038 return 0;
7039
7040 s = dmi_get_system_info(DMI_BIOS_VERSION);
7041 tp->bios_version_str = kstrdup(s, GFP_KERNEL);
7042 if (s && !tp->bios_version_str)
7043 return -ENOMEM;
7044 if (!tp->bios_version_str)
7045 return 0;
7046 tp->bios_model = tp->bios_version_str[0]
7047 | (tp->bios_version_str[1] << 8);
7048
7049 /*
7050 * ThinkPad T23 or newer, A31 or newer, R50e or newer,
7051 * X32 or newer, all Z series; Some models must have an
7052 * up-to-date BIOS or they will not be detected.
7053 *
7054 * See http://thinkwiki.org/wiki/List_of_DMI_IDs
7055 */
7056 while ((dev = dmi_find_device(DMI_DEV_TYPE_OEM_STRING, NULL, dev))) {
7057 if (sscanf(dev->name,
7058 "IBM ThinkPad Embedded Controller -[%17c",
7059 ec_fw_string) == 1) {
7060 ec_fw_string[sizeof(ec_fw_string) - 1] = 0;
7061 ec_fw_string[strcspn(ec_fw_string, " ]")] = 0;
7062
7063 tp->ec_version_str = kstrdup(ec_fw_string, GFP_KERNEL);
7064 if (!tp->ec_version_str)
7065 return -ENOMEM;
7066 tp->ec_model = ec_fw_string[0]
7067 | (ec_fw_string[1] << 8);
7068 break;
7069 }
7070 }
7071
7072 s = dmi_get_system_info(DMI_PRODUCT_VERSION);
7073 if (s && !strnicmp(s, "ThinkPad", 8)) {
7074 tp->model_str = kstrdup(s, GFP_KERNEL);
7075 if (!tp->model_str)
7076 return -ENOMEM;
7077 }
7078
7079 s = dmi_get_system_info(DMI_PRODUCT_NAME);
7080 tp->nummodel_str = kstrdup(s, GFP_KERNEL);
7081 if (s && !tp->nummodel_str)
7082 return -ENOMEM;
7083
7084 return 0;
7085 }
7086
7087 static int __init probe_for_thinkpad(void)
7088 {
7089 int is_thinkpad;
7090
7091 if (acpi_disabled)
7092 return -ENODEV;
7093
7094 /*
7095 * Non-ancient models have better DMI tagging, but very old models
7096 * don't.
7097 */
7098 is_thinkpad = (thinkpad_id.model_str != NULL);
7099
7100 /* ec is required because many other handles are relative to it */
7101 TPACPI_ACPIHANDLE_INIT(ec);
7102 if (!ec_handle) {
7103 if (is_thinkpad)
7104 printk(TPACPI_ERR
7105 "Not yet supported ThinkPad detected!\n");
7106 return -ENODEV;
7107 }
7108
7109 /*
7110 * Risks a regression on very old machines, but reduces potential
7111 * false positives a damn great deal
7112 */
7113 if (!is_thinkpad)
7114 is_thinkpad = (thinkpad_id.vendor == PCI_VENDOR_ID_IBM);
7115
7116 if (!is_thinkpad && !force_load)
7117 return -ENODEV;
7118
7119 return 0;
7120 }
7121
7122
7123 /* Module init, exit, parameters */
7124
7125 static struct ibm_init_struct ibms_init[] __initdata = {
7126 {
7127 .init = thinkpad_acpi_driver_init,
7128 .data = &thinkpad_acpi_driver_data,
7129 },
7130 {
7131 .init = hotkey_init,
7132 .data = &hotkey_driver_data,
7133 },
7134 {
7135 .init = bluetooth_init,
7136 .data = &bluetooth_driver_data,
7137 },
7138 {
7139 .init = wan_init,
7140 .data = &wan_driver_data,
7141 },
7142 {
7143 .init = uwb_init,
7144 .data = &uwb_driver_data,
7145 },
7146 #ifdef CONFIG_THINKPAD_ACPI_VIDEO
7147 {
7148 .init = video_init,
7149 .data = &video_driver_data,
7150 },
7151 #endif
7152 {
7153 .init = light_init,
7154 .data = &light_driver_data,
7155 },
7156 #ifdef CONFIG_THINKPAD_ACPI_DOCK
7157 {
7158 .init = dock_init,
7159 .data = &dock_driver_data[0],
7160 },
7161 {
7162 .init = dock_init2,
7163 .data = &dock_driver_data[1],
7164 },
7165 #endif
7166 #ifdef CONFIG_THINKPAD_ACPI_BAY
7167 {
7168 .init = bay_init,
7169 .data = &bay_driver_data,
7170 },
7171 #endif
7172 {
7173 .init = cmos_init,
7174 .data = &cmos_driver_data,
7175 },
7176 {
7177 .init = led_init,
7178 .data = &led_driver_data,
7179 },
7180 {
7181 .init = beep_init,
7182 .data = &beep_driver_data,
7183 },
7184 {
7185 .init = thermal_init,
7186 .data = &thermal_driver_data,
7187 },
7188 {
7189 .data = &ecdump_driver_data,
7190 },
7191 {
7192 .init = brightness_init,
7193 .data = &brightness_driver_data,
7194 },
7195 {
7196 .data = &volume_driver_data,
7197 },
7198 {
7199 .init = fan_init,
7200 .data = &fan_driver_data,
7201 },
7202 };
7203
7204 static int __init set_ibm_param(const char *val, struct kernel_param *kp)
7205 {
7206 unsigned int i;
7207 struct ibm_struct *ibm;
7208
7209 if (!kp || !kp->name || !val)
7210 return -EINVAL;
7211
7212 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
7213 ibm = ibms_init[i].data;
7214 WARN_ON(ibm == NULL);
7215
7216 if (!ibm || !ibm->name)
7217 continue;
7218
7219 if (strcmp(ibm->name, kp->name) == 0 && ibm->write) {
7220 if (strlen(val) > sizeof(ibms_init[i].param) - 2)
7221 return -ENOSPC;
7222 strcpy(ibms_init[i].param, val);
7223 strcat(ibms_init[i].param, ",");
7224 return 0;
7225 }
7226 }
7227
7228 return -EINVAL;
7229 }
7230
7231 module_param(experimental, int, 0);
7232 MODULE_PARM_DESC(experimental,
7233 "Enables experimental features when non-zero");
7234
7235 module_param_named(debug, dbg_level, uint, 0);
7236 MODULE_PARM_DESC(debug, "Sets debug level bit-mask");
7237
7238 module_param(force_load, bool, 0);
7239 MODULE_PARM_DESC(force_load,
7240 "Attempts to load the driver even on a "
7241 "mis-identified ThinkPad when true");
7242
7243 module_param_named(fan_control, fan_control_allowed, bool, 0);
7244 MODULE_PARM_DESC(fan_control,
7245 "Enables setting fan parameters features when true");
7246
7247 module_param_named(brightness_mode, brightness_mode, int, 0);
7248 MODULE_PARM_DESC(brightness_mode,
7249 "Selects brightness control strategy: "
7250 "0=auto, 1=EC, 2=CMOS, 3=both");
7251
7252 module_param(brightness_enable, uint, 0);
7253 MODULE_PARM_DESC(brightness_enable,
7254 "Enables backlight control when 1, disables when 0");
7255
7256 module_param(hotkey_report_mode, uint, 0);
7257 MODULE_PARM_DESC(hotkey_report_mode,
7258 "used for backwards compatibility with userspace, "
7259 "see documentation");
7260
7261 #define TPACPI_PARAM(feature) \
7262 module_param_call(feature, set_ibm_param, NULL, NULL, 0); \
7263 MODULE_PARM_DESC(feature, "Simulates thinkpad-acpi procfs command " \
7264 "at module load, see documentation")
7265
7266 TPACPI_PARAM(hotkey);
7267 TPACPI_PARAM(bluetooth);
7268 TPACPI_PARAM(video);
7269 TPACPI_PARAM(light);
7270 #ifdef CONFIG_THINKPAD_ACPI_DOCK
7271 TPACPI_PARAM(dock);
7272 #endif
7273 #ifdef CONFIG_THINKPAD_ACPI_BAY
7274 TPACPI_PARAM(bay);
7275 #endif /* CONFIG_THINKPAD_ACPI_BAY */
7276 TPACPI_PARAM(cmos);
7277 TPACPI_PARAM(led);
7278 TPACPI_PARAM(beep);
7279 TPACPI_PARAM(ecdump);
7280 TPACPI_PARAM(brightness);
7281 TPACPI_PARAM(volume);
7282 TPACPI_PARAM(fan);
7283
7284 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
7285 module_param(dbg_wlswemul, uint, 0);
7286 MODULE_PARM_DESC(dbg_wlswemul, "Enables WLSW emulation");
7287 module_param_named(wlsw_state, tpacpi_wlsw_emulstate, bool, 0);
7288 MODULE_PARM_DESC(wlsw_state,
7289 "Initial state of the emulated WLSW switch");
7290
7291 module_param(dbg_bluetoothemul, uint, 0);
7292 MODULE_PARM_DESC(dbg_bluetoothemul, "Enables bluetooth switch emulation");
7293 module_param_named(bluetooth_state, tpacpi_bluetooth_emulstate, bool, 0);
7294 MODULE_PARM_DESC(bluetooth_state,
7295 "Initial state of the emulated bluetooth switch");
7296
7297 module_param(dbg_wwanemul, uint, 0);
7298 MODULE_PARM_DESC(dbg_wwanemul, "Enables WWAN switch emulation");
7299 module_param_named(wwan_state, tpacpi_wwan_emulstate, bool, 0);
7300 MODULE_PARM_DESC(wwan_state,
7301 "Initial state of the emulated WWAN switch");
7302
7303 module_param(dbg_uwbemul, uint, 0);
7304 MODULE_PARM_DESC(dbg_uwbemul, "Enables UWB switch emulation");
7305 module_param_named(uwb_state, tpacpi_uwb_emulstate, bool, 0);
7306 MODULE_PARM_DESC(uwb_state,
7307 "Initial state of the emulated UWB switch");
7308 #endif
7309
7310 static void thinkpad_acpi_module_exit(void)
7311 {
7312 struct ibm_struct *ibm, *itmp;
7313
7314 tpacpi_lifecycle = TPACPI_LIFE_EXITING;
7315
7316 list_for_each_entry_safe_reverse(ibm, itmp,
7317 &tpacpi_all_drivers,
7318 all_drivers) {
7319 ibm_exit(ibm);
7320 }
7321
7322 dbg_printk(TPACPI_DBG_INIT, "finished subdriver exit path...\n");
7323
7324 if (tpacpi_inputdev) {
7325 if (tp_features.input_device_registered)
7326 input_unregister_device(tpacpi_inputdev);
7327 else
7328 input_free_device(tpacpi_inputdev);
7329 }
7330
7331 if (tpacpi_hwmon)
7332 hwmon_device_unregister(tpacpi_hwmon);
7333
7334 if (tp_features.sensors_pdev_attrs_registered)
7335 device_remove_file(&tpacpi_sensors_pdev->dev,
7336 &dev_attr_thinkpad_acpi_pdev_name);
7337 if (tpacpi_sensors_pdev)
7338 platform_device_unregister(tpacpi_sensors_pdev);
7339 if (tpacpi_pdev)
7340 platform_device_unregister(tpacpi_pdev);
7341
7342 if (tp_features.sensors_pdrv_attrs_registered)
7343 tpacpi_remove_driver_attributes(&tpacpi_hwmon_pdriver.driver);
7344 if (tp_features.platform_drv_attrs_registered)
7345 tpacpi_remove_driver_attributes(&tpacpi_pdriver.driver);
7346
7347 if (tp_features.sensors_pdrv_registered)
7348 platform_driver_unregister(&tpacpi_hwmon_pdriver);
7349
7350 if (tp_features.platform_drv_registered)
7351 platform_driver_unregister(&tpacpi_pdriver);
7352
7353 if (proc_dir)
7354 remove_proc_entry(TPACPI_PROC_DIR, acpi_root_dir);
7355
7356 if (tpacpi_wq)
7357 destroy_workqueue(tpacpi_wq);
7358
7359 kfree(thinkpad_id.bios_version_str);
7360 kfree(thinkpad_id.ec_version_str);
7361 kfree(thinkpad_id.model_str);
7362 }
7363
7364
7365 static int __init thinkpad_acpi_module_init(void)
7366 {
7367 int ret, i;
7368
7369 tpacpi_lifecycle = TPACPI_LIFE_INIT;
7370
7371 /* Parameter checking */
7372 if (hotkey_report_mode > 2)
7373 return -EINVAL;
7374
7375 /* Driver-level probe */
7376
7377 ret = get_thinkpad_model_data(&thinkpad_id);
7378 if (ret) {
7379 printk(TPACPI_ERR
7380 "unable to get DMI data: %d\n", ret);
7381 thinkpad_acpi_module_exit();
7382 return ret;
7383 }
7384 ret = probe_for_thinkpad();
7385 if (ret) {
7386 thinkpad_acpi_module_exit();
7387 return ret;
7388 }
7389
7390 /* Driver initialization */
7391
7392 TPACPI_ACPIHANDLE_INIT(ecrd);
7393 TPACPI_ACPIHANDLE_INIT(ecwr);
7394
7395 tpacpi_wq = create_singlethread_workqueue(TPACPI_WORKQUEUE_NAME);
7396 if (!tpacpi_wq) {
7397 thinkpad_acpi_module_exit();
7398 return -ENOMEM;
7399 }
7400
7401 proc_dir = proc_mkdir(TPACPI_PROC_DIR, acpi_root_dir);
7402 if (!proc_dir) {
7403 printk(TPACPI_ERR
7404 "unable to create proc dir " TPACPI_PROC_DIR);
7405 thinkpad_acpi_module_exit();
7406 return -ENODEV;
7407 }
7408 proc_dir->owner = THIS_MODULE;
7409
7410 ret = platform_driver_register(&tpacpi_pdriver);
7411 if (ret) {
7412 printk(TPACPI_ERR
7413 "unable to register main platform driver\n");
7414 thinkpad_acpi_module_exit();
7415 return ret;
7416 }
7417 tp_features.platform_drv_registered = 1;
7418
7419 ret = platform_driver_register(&tpacpi_hwmon_pdriver);
7420 if (ret) {
7421 printk(TPACPI_ERR
7422 "unable to register hwmon platform driver\n");
7423 thinkpad_acpi_module_exit();
7424 return ret;
7425 }
7426 tp_features.sensors_pdrv_registered = 1;
7427
7428 ret = tpacpi_create_driver_attributes(&tpacpi_pdriver.driver);
7429 if (!ret) {
7430 tp_features.platform_drv_attrs_registered = 1;
7431 ret = tpacpi_create_driver_attributes(
7432 &tpacpi_hwmon_pdriver.driver);
7433 }
7434 if (ret) {
7435 printk(TPACPI_ERR
7436 "unable to create sysfs driver attributes\n");
7437 thinkpad_acpi_module_exit();
7438 return ret;
7439 }
7440 tp_features.sensors_pdrv_attrs_registered = 1;
7441
7442
7443 /* Device initialization */
7444 tpacpi_pdev = platform_device_register_simple(TPACPI_DRVR_NAME, -1,
7445 NULL, 0);
7446 if (IS_ERR(tpacpi_pdev)) {
7447 ret = PTR_ERR(tpacpi_pdev);
7448 tpacpi_pdev = NULL;
7449 printk(TPACPI_ERR "unable to register platform device\n");
7450 thinkpad_acpi_module_exit();
7451 return ret;
7452 }
7453 tpacpi_sensors_pdev = platform_device_register_simple(
7454 TPACPI_HWMON_DRVR_NAME,
7455 -1, NULL, 0);
7456 if (IS_ERR(tpacpi_sensors_pdev)) {
7457 ret = PTR_ERR(tpacpi_sensors_pdev);
7458 tpacpi_sensors_pdev = NULL;
7459 printk(TPACPI_ERR
7460 "unable to register hwmon platform device\n");
7461 thinkpad_acpi_module_exit();
7462 return ret;
7463 }
7464 ret = device_create_file(&tpacpi_sensors_pdev->dev,
7465 &dev_attr_thinkpad_acpi_pdev_name);
7466 if (ret) {
7467 printk(TPACPI_ERR
7468 "unable to create sysfs hwmon device attributes\n");
7469 thinkpad_acpi_module_exit();
7470 return ret;
7471 }
7472 tp_features.sensors_pdev_attrs_registered = 1;
7473 tpacpi_hwmon = hwmon_device_register(&tpacpi_sensors_pdev->dev);
7474 if (IS_ERR(tpacpi_hwmon)) {
7475 ret = PTR_ERR(tpacpi_hwmon);
7476 tpacpi_hwmon = NULL;
7477 printk(TPACPI_ERR "unable to register hwmon device\n");
7478 thinkpad_acpi_module_exit();
7479 return ret;
7480 }
7481 mutex_init(&tpacpi_inputdev_send_mutex);
7482 tpacpi_inputdev = input_allocate_device();
7483 if (!tpacpi_inputdev) {
7484 printk(TPACPI_ERR "unable to allocate input device\n");
7485 thinkpad_acpi_module_exit();
7486 return -ENOMEM;
7487 } else {
7488 /* Prepare input device, but don't register */
7489 tpacpi_inputdev->name = "ThinkPad Extra Buttons";
7490 tpacpi_inputdev->phys = TPACPI_DRVR_NAME "/input0";
7491 tpacpi_inputdev->id.bustype = BUS_HOST;
7492 tpacpi_inputdev->id.vendor = (thinkpad_id.vendor) ?
7493 thinkpad_id.vendor :
7494 PCI_VENDOR_ID_IBM;
7495 tpacpi_inputdev->id.product = TPACPI_HKEY_INPUT_PRODUCT;
7496 tpacpi_inputdev->id.version = TPACPI_HKEY_INPUT_VERSION;
7497 }
7498 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
7499 ret = ibm_init(&ibms_init[i]);
7500 if (ret >= 0 && *ibms_init[i].param)
7501 ret = ibms_init[i].data->write(ibms_init[i].param);
7502 if (ret < 0) {
7503 thinkpad_acpi_module_exit();
7504 return ret;
7505 }
7506 }
7507 ret = input_register_device(tpacpi_inputdev);
7508 if (ret < 0) {
7509 printk(TPACPI_ERR "unable to register input device\n");
7510 thinkpad_acpi_module_exit();
7511 return ret;
7512 } else {
7513 tp_features.input_device_registered = 1;
7514 }
7515
7516 tpacpi_lifecycle = TPACPI_LIFE_RUNNING;
7517 return 0;
7518 }
7519
7520 MODULE_ALIAS(TPACPI_DRVR_SHORTNAME);
7521
7522 /*
7523 * DMI matching for module autoloading
7524 *
7525 * See http://thinkwiki.org/wiki/List_of_DMI_IDs
7526 * See http://thinkwiki.org/wiki/BIOS_Upgrade_Downloads
7527 *
7528 * Only models listed in thinkwiki will be supported, so add yours
7529 * if it is not there yet.
7530 */
7531 #define IBM_BIOS_MODULE_ALIAS(__type) \
7532 MODULE_ALIAS("dmi:bvnIBM:bvr" __type "ET??WW*")
7533
7534 /* Non-ancient thinkpads */
7535 MODULE_ALIAS("dmi:bvnIBM:*:svnIBM:*:pvrThinkPad*:rvnIBM:*");
7536 MODULE_ALIAS("dmi:bvnLENOVO:*:svnLENOVO:*:pvrThinkPad*:rvnLENOVO:*");
7537
7538 /* Ancient thinkpad BIOSes have to be identified by
7539 * BIOS type or model number, and there are far less
7540 * BIOS types than model numbers... */
7541 IBM_BIOS_MODULE_ALIAS("I[BDHIMNOTWVYZ]");
7542 IBM_BIOS_MODULE_ALIAS("1[0368A-GIKM-PST]");
7543 IBM_BIOS_MODULE_ALIAS("K[UX-Z]");
7544
7545 MODULE_AUTHOR("Borislav Deianov, Henrique de Moraes Holschuh");
7546 MODULE_DESCRIPTION(TPACPI_DESC);
7547 MODULE_VERSION(TPACPI_VERSION);
7548 MODULE_LICENSE("GPL");
7549
7550 module_init(thinkpad_acpi_module_init);
7551 module_exit(thinkpad_acpi_module_exit);
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree