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ACPI: thinkpad-acpi: clean-up fan subdriver quirk
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / platform / x86 / thinkpad_acpi.c
blob213219d938e8f16fdf73a06efe8d84df55738d5f
1 /*
2 * thinkpad_acpi.c - ThinkPad ACPI Extras
3 *
4 *
5 * Copyright (C) 2004-2005 Borislav Deianov <borislav@users.sf.net>
6 * Copyright (C) 2006-2008 Henrique de Moraes Holschuh <hmh@hmh.eng.br>
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
21 * 02110-1301, USA.
22 */
23
24 #define TPACPI_VERSION "0.21"
25 #define TPACPI_SYSFS_VERSION 0x020200
26
27 /*
28 * Changelog:
29 * 2007-10-20 changelog trimmed down
30 *
31 * 2007-03-27 0.14 renamed to thinkpad_acpi and moved to
32 * drivers/misc.
33 *
34 * 2006-11-22 0.13 new maintainer
35 * changelog now lives in git commit history, and will
36 * not be updated further in-file.
37 *
38 * 2005-03-17 0.11 support for 600e, 770x
39 * thanks to Jamie Lentin <lentinj@dial.pipex.com>
40 *
41 * 2005-01-16 0.9 use MODULE_VERSION
42 * thanks to Henrik Brix Andersen <brix@gentoo.org>
43 * fix parameter passing on module loading
44 * thanks to Rusty Russell <rusty@rustcorp.com.au>
45 * thanks to Jim Radford <radford@blackbean.org>
46 * 2004-11-08 0.8 fix init error case, don't return from a macro
47 * thanks to Chris Wright <chrisw@osdl.org>
48 */
49
50 #include <linux/kernel.h>
51 #include <linux/module.h>
52 #include <linux/init.h>
53 #include <linux/types.h>
54 #include <linux/string.h>
55 #include <linux/list.h>
56 #include <linux/mutex.h>
57 #include <linux/kthread.h>
58 #include <linux/freezer.h>
59 #include <linux/delay.h>
60
61 #include <linux/nvram.h>
62 #include <linux/proc_fs.h>
63 #include <linux/sysfs.h>
64 #include <linux/backlight.h>
65 #include <linux/fb.h>
66 #include <linux/platform_device.h>
67 #include <linux/hwmon.h>
68 #include <linux/hwmon-sysfs.h>
69 #include <linux/input.h>
70 #include <linux/leds.h>
71 #include <linux/rfkill.h>
72 #include <asm/uaccess.h>
73
74 #include <linux/dmi.h>
75 #include <linux/jiffies.h>
76 #include <linux/workqueue.h>
77
78 #include <acpi/acpi_drivers.h>
79
80 #include <linux/pci_ids.h>
81
82
83 /* ThinkPad CMOS commands */
84 #define TP_CMOS_VOLUME_DOWN 0
85 #define TP_CMOS_VOLUME_UP 1
86 #define TP_CMOS_VOLUME_MUTE 2
87 #define TP_CMOS_BRIGHTNESS_UP 4
88 #define TP_CMOS_BRIGHTNESS_DOWN 5
89 #define TP_CMOS_THINKLIGHT_ON 12
90 #define TP_CMOS_THINKLIGHT_OFF 13
91
92 /* NVRAM Addresses */
93 enum tp_nvram_addr {
94 TP_NVRAM_ADDR_HK2 = 0x57,
95 TP_NVRAM_ADDR_THINKLIGHT = 0x58,
96 TP_NVRAM_ADDR_VIDEO = 0x59,
97 TP_NVRAM_ADDR_BRIGHTNESS = 0x5e,
98 TP_NVRAM_ADDR_MIXER = 0x60,
99 };
100
101 /* NVRAM bit masks */
102 enum {
103 TP_NVRAM_MASK_HKT_THINKPAD = 0x08,
104 TP_NVRAM_MASK_HKT_ZOOM = 0x20,
105 TP_NVRAM_MASK_HKT_DISPLAY = 0x40,
106 TP_NVRAM_MASK_HKT_HIBERNATE = 0x80,
107 TP_NVRAM_MASK_THINKLIGHT = 0x10,
108 TP_NVRAM_MASK_HKT_DISPEXPND = 0x30,
109 TP_NVRAM_MASK_HKT_BRIGHTNESS = 0x20,
110 TP_NVRAM_MASK_LEVEL_BRIGHTNESS = 0x0f,
111 TP_NVRAM_POS_LEVEL_BRIGHTNESS = 0,
112 TP_NVRAM_MASK_MUTE = 0x40,
113 TP_NVRAM_MASK_HKT_VOLUME = 0x80,
114 TP_NVRAM_MASK_LEVEL_VOLUME = 0x0f,
115 TP_NVRAM_POS_LEVEL_VOLUME = 0,
116 };
117
118 /* ACPI HIDs */
119 #define TPACPI_ACPI_HKEY_HID "IBM0068"
120
121 /* Input IDs */
122 #define TPACPI_HKEY_INPUT_PRODUCT 0x5054 /* "TP" */
123 #define TPACPI_HKEY_INPUT_VERSION 0x4101
124
125 /* ACPI \WGSV commands */
126 enum {
127 TP_ACPI_WGSV_GET_STATE = 0x01, /* Get state information */
128 TP_ACPI_WGSV_PWR_ON_ON_RESUME = 0x02, /* Resume WWAN powered on */
129 TP_ACPI_WGSV_PWR_OFF_ON_RESUME = 0x03, /* Resume WWAN powered off */
130 TP_ACPI_WGSV_SAVE_STATE = 0x04, /* Save state for S4/S5 */
131 };
132
133 /* TP_ACPI_WGSV_GET_STATE bits */
134 enum {
135 TP_ACPI_WGSV_STATE_WWANEXIST = 0x0001, /* WWAN hw available */
136 TP_ACPI_WGSV_STATE_WWANPWR = 0x0002, /* WWAN radio enabled */
137 TP_ACPI_WGSV_STATE_WWANPWRRES = 0x0004, /* WWAN state at resume */
138 TP_ACPI_WGSV_STATE_WWANBIOSOFF = 0x0008, /* WWAN disabled in BIOS */
139 TP_ACPI_WGSV_STATE_BLTHEXIST = 0x0001, /* BLTH hw available */
140 TP_ACPI_WGSV_STATE_BLTHPWR = 0x0002, /* BLTH radio enabled */
141 TP_ACPI_WGSV_STATE_BLTHPWRRES = 0x0004, /* BLTH state at resume */
142 TP_ACPI_WGSV_STATE_BLTHBIOSOFF = 0x0008, /* BLTH disabled in BIOS */
143 TP_ACPI_WGSV_STATE_UWBEXIST = 0x0010, /* UWB hw available */
144 TP_ACPI_WGSV_STATE_UWBPWR = 0x0020, /* UWB radio enabled */
145 };
146
147 /****************************************************************************
148 * Main driver
149 */
150
151 #define TPACPI_NAME "thinkpad"
152 #define TPACPI_DESC "ThinkPad ACPI Extras"
153 #define TPACPI_FILE TPACPI_NAME "_acpi"
154 #define TPACPI_URL "http://ibm-acpi.sf.net/"
155 #define TPACPI_MAIL "ibm-acpi-devel@lists.sourceforge.net"
156
157 #define TPACPI_PROC_DIR "ibm"
158 #define TPACPI_ACPI_EVENT_PREFIX "ibm"
159 #define TPACPI_DRVR_NAME TPACPI_FILE
160 #define TPACPI_DRVR_SHORTNAME "tpacpi"
161 #define TPACPI_HWMON_DRVR_NAME TPACPI_NAME "_hwmon"
162
163 #define TPACPI_NVRAM_KTHREAD_NAME "ktpacpi_nvramd"
164 #define TPACPI_WORKQUEUE_NAME "ktpacpid"
165
166 #define TPACPI_MAX_ACPI_ARGS 3
167
168 /* rfkill switches */
169 enum {
170 TPACPI_RFK_BLUETOOTH_SW_ID = 0,
171 TPACPI_RFK_WWAN_SW_ID,
172 TPACPI_RFK_UWB_SW_ID,
173 };
174
175 /* Debugging */
176 #define TPACPI_LOG TPACPI_FILE ": "
177 #define TPACPI_ALERT KERN_ALERT TPACPI_LOG
178 #define TPACPI_CRIT KERN_CRIT TPACPI_LOG
179 #define TPACPI_ERR KERN_ERR TPACPI_LOG
180 #define TPACPI_NOTICE KERN_NOTICE TPACPI_LOG
181 #define TPACPI_INFO KERN_INFO TPACPI_LOG
182 #define TPACPI_DEBUG KERN_DEBUG TPACPI_LOG
183
184 #define TPACPI_DBG_ALL 0xffff
185 #define TPACPI_DBG_INIT 0x0001
186 #define TPACPI_DBG_EXIT 0x0002
187 #define dbg_printk(a_dbg_level, format, arg...) \
188 do { if (dbg_level & a_dbg_level) \
189 printk(TPACPI_DEBUG "%s: " format, __func__ , ## arg); \
190 } while (0)
191 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
192 #define vdbg_printk(a_dbg_level, format, arg...) \
193 dbg_printk(a_dbg_level, format, ## arg)
194 static const char *str_supported(int is_supported);
195 #else
196 #define vdbg_printk(a_dbg_level, format, arg...)
197 #endif
198
199 #define onoff(status, bit) ((status) & (1 << (bit)) ? "on" : "off")
200 #define enabled(status, bit) ((status) & (1 << (bit)) ? "enabled" : "disabled")
201 #define strlencmp(a, b) (strncmp((a), (b), strlen(b)))
202
203
204 /****************************************************************************
205 * Driver-wide structs and misc. variables
206 */
207
208 struct ibm_struct;
209
210 struct tp_acpi_drv_struct {
211 const struct acpi_device_id *hid;
212 struct acpi_driver *driver;
213
214 void (*notify) (struct ibm_struct *, u32);
215 acpi_handle *handle;
216 u32 type;
217 struct acpi_device *device;
218 };
219
220 struct ibm_struct {
221 char *name;
222
223 int (*read) (char *);
224 int (*write) (char *);
225 void (*exit) (void);
226 void (*resume) (void);
227 void (*suspend) (pm_message_t state);
228 void (*shutdown) (void);
229
230 struct list_head all_drivers;
231
232 struct tp_acpi_drv_struct *acpi;
233
234 struct {
235 u8 acpi_driver_registered:1;
236 u8 acpi_notify_installed:1;
237 u8 proc_created:1;
238 u8 init_called:1;
239 u8 experimental:1;
240 } flags;
241 };
242
243 struct ibm_init_struct {
244 char param[32];
245
246 int (*init) (struct ibm_init_struct *);
247 struct ibm_struct *data;
248 };
249
250 static struct {
251 #ifdef CONFIG_THINKPAD_ACPI_BAY
252 u32 bay_status:1;
253 u32 bay_eject:1;
254 u32 bay_status2:1;
255 u32 bay_eject2:1;
256 #endif
257 u32 bluetooth:1;
258 u32 hotkey:1;
259 u32 hotkey_mask:1;
260 u32 hotkey_wlsw:1;
261 u32 hotkey_tablet:1;
262 u32 light:1;
263 u32 light_status:1;
264 u32 bright_16levels:1;
265 u32 bright_acpimode:1;
266 u32 wan:1;
267 u32 uwb:1;
268 u32 fan_ctrl_status_undef:1;
269 u32 input_device_registered:1;
270 u32 platform_drv_registered:1;
271 u32 platform_drv_attrs_registered:1;
272 u32 sensors_pdrv_registered:1;
273 u32 sensors_pdrv_attrs_registered:1;
274 u32 sensors_pdev_attrs_registered:1;
275 u32 hotkey_poll_active:1;
276 } tp_features;
277
278 static struct {
279 u16 hotkey_mask_ff:1;
280 u16 bright_cmos_ec_unsync:1;
281 } tp_warned;
282
283 struct thinkpad_id_data {
284 unsigned int vendor; /* ThinkPad vendor:
285 * PCI_VENDOR_ID_IBM/PCI_VENDOR_ID_LENOVO */
286
287 char *bios_version_str; /* Something like 1ZET51WW (1.03z) */
288 char *ec_version_str; /* Something like 1ZHT51WW-1.04a */
289
290 u16 bios_model; /* Big Endian, TP-1Y = 0x5931, 0 = unknown */
291 u16 ec_model;
292
293 char *model_str; /* ThinkPad T43 */
294 char *nummodel_str; /* 9384A9C for a 9384-A9C model */
295 };
296 static struct thinkpad_id_data thinkpad_id;
297
298 static enum {
299 TPACPI_LIFE_INIT = 0,
300 TPACPI_LIFE_RUNNING,
301 TPACPI_LIFE_EXITING,
302 } tpacpi_lifecycle;
303
304 static int experimental;
305 static u32 dbg_level;
306
307 static struct workqueue_struct *tpacpi_wq;
308
309 /* Special LED class that can defer work */
310 struct tpacpi_led_classdev {
311 struct led_classdev led_classdev;
312 struct work_struct work;
313 enum led_brightness new_brightness;
314 unsigned int led;
315 };
316
317 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
318 static int dbg_wlswemul;
319 static int tpacpi_wlsw_emulstate;
320 static int dbg_bluetoothemul;
321 static int tpacpi_bluetooth_emulstate;
322 static int dbg_wwanemul;
323 static int tpacpi_wwan_emulstate;
324 static int dbg_uwbemul;
325 static int tpacpi_uwb_emulstate;
326 #endif
327
328
329 /****************************************************************************
330 ****************************************************************************
331 *
332 * ACPI Helpers and device model
333 *
334 ****************************************************************************
335 ****************************************************************************/
336
337 /*************************************************************************
338 * ACPI basic handles
339 */
340
341 static acpi_handle root_handle;
342
343 #define TPACPI_HANDLE(object, parent, paths...) \
344 static acpi_handle object##_handle; \
345 static acpi_handle *object##_parent = &parent##_handle; \
346 static char *object##_path; \
347 static char *object##_paths[] = { paths }
348
349 TPACPI_HANDLE(ec, root, "\\_SB.PCI0.ISA.EC0", /* 240, 240x */
350 "\\_SB.PCI.ISA.EC", /* 570 */
351 "\\_SB.PCI0.ISA0.EC0", /* 600e/x, 770e, 770x */
352 "\\_SB.PCI0.ISA.EC", /* A21e, A2xm/p, T20-22, X20-21 */
353 "\\_SB.PCI0.AD4S.EC0", /* i1400, R30 */
354 "\\_SB.PCI0.ICH3.EC0", /* R31 */
355 "\\_SB.PCI0.LPC.EC", /* all others */
356 );
357
358 TPACPI_HANDLE(ecrd, ec, "ECRD"); /* 570 */
359 TPACPI_HANDLE(ecwr, ec, "ECWR"); /* 570 */
360
361 TPACPI_HANDLE(cmos, root, "\\UCMS", /* R50, R50e, R50p, R51, */
362 /* T4x, X31, X40 */
363 "\\CMOS", /* A3x, G4x, R32, T23, T30, X22-24, X30 */
364 "\\CMS", /* R40, R40e */
365 ); /* all others */
366
367 TPACPI_HANDLE(hkey, ec, "\\_SB.HKEY", /* 600e/x, 770e, 770x */
368 "^HKEY", /* R30, R31 */
369 "HKEY", /* all others */
370 ); /* 570 */
371
372 TPACPI_HANDLE(vid, root, "\\_SB.PCI.AGP.VGA", /* 570 */
373 "\\_SB.PCI0.AGP0.VID0", /* 600e/x, 770x */
374 "\\_SB.PCI0.VID0", /* 770e */
375 "\\_SB.PCI0.VID", /* A21e, G4x, R50e, X30, X40 */
376 "\\_SB.PCI0.AGP.VID", /* all others */
377 ); /* R30, R31 */
378
379
380 /*************************************************************************
381 * ACPI helpers
382 */
383
384 static int acpi_evalf(acpi_handle handle,
385 void *res, char *method, char *fmt, ...)
386 {
387 char *fmt0 = fmt;
388 struct acpi_object_list params;
389 union acpi_object in_objs[TPACPI_MAX_ACPI_ARGS];
390 struct acpi_buffer result, *resultp;
391 union acpi_object out_obj;
392 acpi_status status;
393 va_list ap;
394 char res_type;
395 int success;
396 int quiet;
397
398 if (!*fmt) {
399 printk(TPACPI_ERR "acpi_evalf() called with empty format\n");
400 return 0;
401 }
402
403 if (*fmt == 'q') {
404 quiet = 1;
405 fmt++;
406 } else
407 quiet = 0;
408
409 res_type = *(fmt++);
410
411 params.count = 0;
412 params.pointer = &in_objs[0];
413
414 va_start(ap, fmt);
415 while (*fmt) {
416 char c = *(fmt++);
417 switch (c) {
418 case 'd': /* int */
419 in_objs[params.count].integer.value = va_arg(ap, int);
420 in_objs[params.count++].type = ACPI_TYPE_INTEGER;
421 break;
422 /* add more types as needed */
423 default:
424 printk(TPACPI_ERR "acpi_evalf() called "
425 "with invalid format character '%c'\n", c);
426 return 0;
427 }
428 }
429 va_end(ap);
430
431 if (res_type != 'v') {
432 result.length = sizeof(out_obj);
433 result.pointer = &out_obj;
434 resultp = &result;
435 } else
436 resultp = NULL;
437
438 status = acpi_evaluate_object(handle, method, &params, resultp);
439
440 switch (res_type) {
441 case 'd': /* int */
442 if (res)
443 *(int *)res = out_obj.integer.value;
444 success = status == AE_OK && out_obj.type == ACPI_TYPE_INTEGER;
445 break;
446 case 'v': /* void */
447 success = status == AE_OK;
448 break;
449 /* add more types as needed */
450 default:
451 printk(TPACPI_ERR "acpi_evalf() called "
452 "with invalid format character '%c'\n", res_type);
453 return 0;
454 }
455
456 if (!success && !quiet)
457 printk(TPACPI_ERR "acpi_evalf(%s, %s, ...) failed: %d\n",
458 method, fmt0, status);
459
460 return success;
461 }
462
463 static int acpi_ec_read(int i, u8 *p)
464 {
465 int v;
466
467 if (ecrd_handle) {
468 if (!acpi_evalf(ecrd_handle, &v, NULL, "dd", i))
469 return 0;
470 *p = v;
471 } else {
472 if (ec_read(i, p) < 0)
473 return 0;
474 }
475
476 return 1;
477 }
478
479 static int acpi_ec_write(int i, u8 v)
480 {
481 if (ecwr_handle) {
482 if (!acpi_evalf(ecwr_handle, NULL, NULL, "vdd", i, v))
483 return 0;
484 } else {
485 if (ec_write(i, v) < 0)
486 return 0;
487 }
488
489 return 1;
490 }
491
492 #if defined(CONFIG_THINKPAD_ACPI_DOCK) || defined(CONFIG_THINKPAD_ACPI_BAY)
493 static int _sta(acpi_handle handle)
494 {
495 int status;
496
497 if (!handle || !acpi_evalf(handle, &status, "_STA", "d"))
498 status = 0;
499
500 return status;
501 }
502 #endif
503
504 static int issue_thinkpad_cmos_command(int cmos_cmd)
505 {
506 if (!cmos_handle)
507 return -ENXIO;
508
509 if (!acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd))
510 return -EIO;
511
512 return 0;
513 }
514
515 /*************************************************************************
516 * ACPI device model
517 */
518
519 #define TPACPI_ACPIHANDLE_INIT(object) \
520 drv_acpi_handle_init(#object, &object##_handle, *object##_parent, \
521 object##_paths, ARRAY_SIZE(object##_paths), &object##_path)
522
523 static void drv_acpi_handle_init(char *name,
524 acpi_handle *handle, acpi_handle parent,
525 char **paths, int num_paths, char **path)
526 {
527 int i;
528 acpi_status status;
529
530 vdbg_printk(TPACPI_DBG_INIT, "trying to locate ACPI handle for %s\n",
531 name);
532
533 for (i = 0; i < num_paths; i++) {
534 status = acpi_get_handle(parent, paths[i], handle);
535 if (ACPI_SUCCESS(status)) {
536 *path = paths[i];
537 dbg_printk(TPACPI_DBG_INIT,
538 "Found ACPI handle %s for %s\n",
539 *path, name);
540 return;
541 }
542 }
543
544 vdbg_printk(TPACPI_DBG_INIT, "ACPI handle for %s not found\n",
545 name);
546 *handle = NULL;
547 }
548
549 static void dispatch_acpi_notify(acpi_handle handle, u32 event, void *data)
550 {
551 struct ibm_struct *ibm = data;
552
553 if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
554 return;
555
556 if (!ibm || !ibm->acpi || !ibm->acpi->notify)
557 return;
558
559 ibm->acpi->notify(ibm, event);
560 }
561
562 static int __init setup_acpi_notify(struct ibm_struct *ibm)
563 {
564 acpi_status status;
565 int rc;
566
567 BUG_ON(!ibm->acpi);
568
569 if (!*ibm->acpi->handle)
570 return 0;
571
572 vdbg_printk(TPACPI_DBG_INIT,
573 "setting up ACPI notify for %s\n", ibm->name);
574
575 rc = acpi_bus_get_device(*ibm->acpi->handle, &ibm->acpi->device);
576 if (rc < 0) {
577 printk(TPACPI_ERR "acpi_bus_get_device(%s) failed: %d\n",
578 ibm->name, rc);
579 return -ENODEV;
580 }
581
582 ibm->acpi->device->driver_data = ibm;
583 sprintf(acpi_device_class(ibm->acpi->device), "%s/%s",
584 TPACPI_ACPI_EVENT_PREFIX,
585 ibm->name);
586
587 status = acpi_install_notify_handler(*ibm->acpi->handle,
588 ibm->acpi->type, dispatch_acpi_notify, ibm);
589 if (ACPI_FAILURE(status)) {
590 if (status == AE_ALREADY_EXISTS) {
591 printk(TPACPI_NOTICE
592 "another device driver is already "
593 "handling %s events\n", ibm->name);
594 } else {
595 printk(TPACPI_ERR
596 "acpi_install_notify_handler(%s) failed: %d\n",
597 ibm->name, status);
598 }
599 return -ENODEV;
600 }
601 ibm->flags.acpi_notify_installed = 1;
602 return 0;
603 }
604
605 static int __init tpacpi_device_add(struct acpi_device *device)
606 {
607 return 0;
608 }
609
610 static int __init register_tpacpi_subdriver(struct ibm_struct *ibm)
611 {
612 int rc;
613
614 dbg_printk(TPACPI_DBG_INIT,
615 "registering %s as an ACPI driver\n", ibm->name);
616
617 BUG_ON(!ibm->acpi);
618
619 ibm->acpi->driver = kzalloc(sizeof(struct acpi_driver), GFP_KERNEL);
620 if (!ibm->acpi->driver) {
621 printk(TPACPI_ERR
622 "failed to allocate memory for ibm->acpi->driver\n");
623 return -ENOMEM;
624 }
625
626 sprintf(ibm->acpi->driver->name, "%s_%s", TPACPI_NAME, ibm->name);
627 ibm->acpi->driver->ids = ibm->acpi->hid;
628
629 ibm->acpi->driver->ops.add = &tpacpi_device_add;
630
631 rc = acpi_bus_register_driver(ibm->acpi->driver);
632 if (rc < 0) {
633 printk(TPACPI_ERR "acpi_bus_register_driver(%s) failed: %d\n",
634 ibm->name, rc);
635 kfree(ibm->acpi->driver);
636 ibm->acpi->driver = NULL;
637 } else if (!rc)
638 ibm->flags.acpi_driver_registered = 1;
639
640 return rc;
641 }
642
643
644 /****************************************************************************
645 ****************************************************************************
646 *
647 * Procfs Helpers
648 *
649 ****************************************************************************
650 ****************************************************************************/
651
652 static int dispatch_procfs_read(char *page, char **start, off_t off,
653 int count, int *eof, void *data)
654 {
655 struct ibm_struct *ibm = data;
656 int len;
657
658 if (!ibm || !ibm->read)
659 return -EINVAL;
660
661 len = ibm->read(page);
662 if (len < 0)
663 return len;
664
665 if (len <= off + count)
666 *eof = 1;
667 *start = page + off;
668 len -= off;
669 if (len > count)
670 len = count;
671 if (len < 0)
672 len = 0;
673
674 return len;
675 }
676
677 static int dispatch_procfs_write(struct file *file,
678 const char __user *userbuf,
679 unsigned long count, void *data)
680 {
681 struct ibm_struct *ibm = data;
682 char *kernbuf;
683 int ret;
684
685 if (!ibm || !ibm->write)
686 return -EINVAL;
687
688 kernbuf = kmalloc(count + 2, GFP_KERNEL);
689 if (!kernbuf)
690 return -ENOMEM;
691
692 if (copy_from_user(kernbuf, userbuf, count)) {
693 kfree(kernbuf);
694 return -EFAULT;
695 }
696
697 kernbuf[count] = 0;
698 strcat(kernbuf, ",");
699 ret = ibm->write(kernbuf);
700 if (ret == 0)
701 ret = count;
702
703 kfree(kernbuf);
704
705 return ret;
706 }
707
708 static char *next_cmd(char **cmds)
709 {
710 char *start = *cmds;
711 char *end;
712
713 while ((end = strchr(start, ',')) && end == start)
714 start = end + 1;
715
716 if (!end)
717 return NULL;
718
719 *end = 0;
720 *cmds = end + 1;
721 return start;
722 }
723
724
725 /****************************************************************************
726 ****************************************************************************
727 *
728 * Device model: input, hwmon and platform
729 *
730 ****************************************************************************
731 ****************************************************************************/
732
733 static struct platform_device *tpacpi_pdev;
734 static struct platform_device *tpacpi_sensors_pdev;
735 static struct device *tpacpi_hwmon;
736 static struct input_dev *tpacpi_inputdev;
737 static struct mutex tpacpi_inputdev_send_mutex;
738 static LIST_HEAD(tpacpi_all_drivers);
739
740 static int tpacpi_suspend_handler(struct platform_device *pdev,
741 pm_message_t state)
742 {
743 struct ibm_struct *ibm, *itmp;
744
745 list_for_each_entry_safe(ibm, itmp,
746 &tpacpi_all_drivers,
747 all_drivers) {
748 if (ibm->suspend)
749 (ibm->suspend)(state);
750 }
751
752 return 0;
753 }
754
755 static int tpacpi_resume_handler(struct platform_device *pdev)
756 {
757 struct ibm_struct *ibm, *itmp;
758
759 list_for_each_entry_safe(ibm, itmp,
760 &tpacpi_all_drivers,
761 all_drivers) {
762 if (ibm->resume)
763 (ibm->resume)();
764 }
765
766 return 0;
767 }
768
769 static void tpacpi_shutdown_handler(struct platform_device *pdev)
770 {
771 struct ibm_struct *ibm, *itmp;
772
773 list_for_each_entry_safe(ibm, itmp,
774 &tpacpi_all_drivers,
775 all_drivers) {
776 if (ibm->shutdown)
777 (ibm->shutdown)();
778 }
779 }
780
781 static struct platform_driver tpacpi_pdriver = {
782 .driver = {
783 .name = TPACPI_DRVR_NAME,
784 .owner = THIS_MODULE,
785 },
786 .suspend = tpacpi_suspend_handler,
787 .resume = tpacpi_resume_handler,
788 .shutdown = tpacpi_shutdown_handler,
789 };
790
791 static struct platform_driver tpacpi_hwmon_pdriver = {
792 .driver = {
793 .name = TPACPI_HWMON_DRVR_NAME,
794 .owner = THIS_MODULE,
795 },
796 };
797
798 /*************************************************************************
799 * sysfs support helpers
800 */
801
802 struct attribute_set {
803 unsigned int members, max_members;
804 struct attribute_group group;
805 };
806
807 struct attribute_set_obj {
808 struct attribute_set s;
809 struct attribute *a;
810 } __attribute__((packed));
811
812 static struct attribute_set *create_attr_set(unsigned int max_members,
813 const char *name)
814 {
815 struct attribute_set_obj *sobj;
816
817 if (max_members == 0)
818 return NULL;
819
820 /* Allocates space for implicit NULL at the end too */
821 sobj = kzalloc(sizeof(struct attribute_set_obj) +
822 max_members * sizeof(struct attribute *),
823 GFP_KERNEL);
824 if (!sobj)
825 return NULL;
826 sobj->s.max_members = max_members;
827 sobj->s.group.attrs = &sobj->a;
828 sobj->s.group.name = name;
829
830 return &sobj->s;
831 }
832
833 #define destroy_attr_set(_set) \
834 kfree(_set);
835
836 /* not multi-threaded safe, use it in a single thread per set */
837 static int add_to_attr_set(struct attribute_set *s, struct attribute *attr)
838 {
839 if (!s || !attr)
840 return -EINVAL;
841
842 if (s->members >= s->max_members)
843 return -ENOMEM;
844
845 s->group.attrs[s->members] = attr;
846 s->members++;
847
848 return 0;
849 }
850
851 static int add_many_to_attr_set(struct attribute_set *s,
852 struct attribute **attr,
853 unsigned int count)
854 {
855 int i, res;
856
857 for (i = 0; i < count; i++) {
858 res = add_to_attr_set(s, attr[i]);
859 if (res)
860 return res;
861 }
862
863 return 0;
864 }
865
866 static void delete_attr_set(struct attribute_set *s, struct kobject *kobj)
867 {
868 sysfs_remove_group(kobj, &s->group);
869 destroy_attr_set(s);
870 }
871
872 #define register_attr_set_with_sysfs(_attr_set, _kobj) \
873 sysfs_create_group(_kobj, &_attr_set->group)
874
875 static int parse_strtoul(const char *buf,
876 unsigned long max, unsigned long *value)
877 {
878 char *endp;
879
880 while (*buf && isspace(*buf))
881 buf++;
882 *value = simple_strtoul(buf, &endp, 0);
883 while (*endp && isspace(*endp))
884 endp++;
885 if (*endp || *value > max)
886 return -EINVAL;
887
888 return 0;
889 }
890
891 static void tpacpi_disable_brightness_delay(void)
892 {
893 if (acpi_evalf(hkey_handle, NULL, "PWMS", "qvd", 0))
894 printk(TPACPI_NOTICE
895 "ACPI backlight control delay disabled\n");
896 }
897
898 static int __init tpacpi_query_bcl_levels(acpi_handle handle)
899 {
900 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
901 union acpi_object *obj;
902 int rc;
903
904 if (ACPI_SUCCESS(acpi_evaluate_object(handle, NULL, NULL, &buffer))) {
905 obj = (union acpi_object *)buffer.pointer;
906 if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) {
907 printk(TPACPI_ERR "Unknown _BCL data, "
908 "please report this to %s\n", TPACPI_MAIL);
909 rc = 0;
910 } else {
911 rc = obj->package.count;
912 }
913 } else {
914 return 0;
915 }
916
917 kfree(buffer.pointer);
918 return rc;
919 }
920
921 static acpi_status __init tpacpi_acpi_walk_find_bcl(acpi_handle handle,
922 u32 lvl, void *context, void **rv)
923 {
924 char name[ACPI_PATH_SEGMENT_LENGTH];
925 struct acpi_buffer buffer = { sizeof(name), &name };
926
927 if (ACPI_SUCCESS(acpi_get_name(handle, ACPI_SINGLE_NAME, &buffer)) &&
928 !strncmp("_BCL", name, sizeof(name) - 1)) {
929 BUG_ON(!rv || !*rv);
930 **(int **)rv = tpacpi_query_bcl_levels(handle);
931 return AE_CTRL_TERMINATE;
932 } else {
933 return AE_OK;
934 }
935 }
936
937 /*
938 * Returns 0 (no ACPI _BCL or _BCL invalid), or size of brightness map
939 */
940 static int __init tpacpi_check_std_acpi_brightness_support(void)
941 {
942 int status;
943 int bcl_levels = 0;
944 void *bcl_ptr = &bcl_levels;
945
946 if (!vid_handle) {
947 TPACPI_ACPIHANDLE_INIT(vid);
948 }
949 if (!vid_handle)
950 return 0;
951
952 /*
953 * Search for a _BCL method, and execute it. This is safe on all
954 * ThinkPads, and as a side-effect, _BCL will place a Lenovo Vista
955 * BIOS in ACPI backlight control mode. We do NOT have to care
956 * about calling the _BCL method in an enabled video device, any
957 * will do for our purposes.
958 */
959
960 status = acpi_walk_namespace(ACPI_TYPE_METHOD, vid_handle, 3,
961 tpacpi_acpi_walk_find_bcl, NULL,
962 &bcl_ptr);
963
964 if (ACPI_SUCCESS(status) && bcl_levels > 2) {
965 tp_features.bright_acpimode = 1;
966 return (bcl_levels - 2);
967 }
968
969 return 0;
970 }
971
972 static int __init tpacpi_new_rfkill(const unsigned int id,
973 struct rfkill **rfk,
974 const enum rfkill_type rfktype,
975 const char *name,
976 const bool set_default,
977 int (*toggle_radio)(void *, enum rfkill_state),
978 int (*get_state)(void *, enum rfkill_state *))
979 {
980 int res;
981 enum rfkill_state initial_state = RFKILL_STATE_SOFT_BLOCKED;
982
983 res = get_state(NULL, &initial_state);
984 if (res < 0) {
985 printk(TPACPI_ERR
986 "failed to read initial state for %s, error %d; "
987 "will turn radio off\n", name, res);
988 } else if (set_default) {
989 /* try to set the initial state as the default for the rfkill
990 * type, since we ask the firmware to preserve it across S5 in
991 * NVRAM */
992 rfkill_set_default(rfktype,
993 (initial_state == RFKILL_STATE_UNBLOCKED) ?
994 RFKILL_STATE_UNBLOCKED :
995 RFKILL_STATE_SOFT_BLOCKED);
996 }
997
998 *rfk = rfkill_allocate(&tpacpi_pdev->dev, rfktype);
999 if (!*rfk) {
1000 printk(TPACPI_ERR
1001 "failed to allocate memory for rfkill class\n");
1002 return -ENOMEM;
1003 }
1004
1005 (*rfk)->name = name;
1006 (*rfk)->get_state = get_state;
1007 (*rfk)->toggle_radio = toggle_radio;
1008 (*rfk)->state = initial_state;
1009
1010 res = rfkill_register(*rfk);
1011 if (res < 0) {
1012 printk(TPACPI_ERR
1013 "failed to register %s rfkill switch: %d\n",
1014 name, res);
1015 rfkill_free(*rfk);
1016 *rfk = NULL;
1017 return res;
1018 }
1019
1020 return 0;
1021 }
1022
1023 /*************************************************************************
1024 * thinkpad-acpi driver attributes
1025 */
1026
1027 /* interface_version --------------------------------------------------- */
1028 static ssize_t tpacpi_driver_interface_version_show(
1029 struct device_driver *drv,
1030 char *buf)
1031 {
1032 return snprintf(buf, PAGE_SIZE, "0x%08x\n", TPACPI_SYSFS_VERSION);
1033 }
1034
1035 static DRIVER_ATTR(interface_version, S_IRUGO,
1036 tpacpi_driver_interface_version_show, NULL);
1037
1038 /* debug_level --------------------------------------------------------- */
1039 static ssize_t tpacpi_driver_debug_show(struct device_driver *drv,
1040 char *buf)
1041 {
1042 return snprintf(buf, PAGE_SIZE, "0x%04x\n", dbg_level);
1043 }
1044
1045 static ssize_t tpacpi_driver_debug_store(struct device_driver *drv,
1046 const char *buf, size_t count)
1047 {
1048 unsigned long t;
1049
1050 if (parse_strtoul(buf, 0xffff, &t))
1051 return -EINVAL;
1052
1053 dbg_level = t;
1054
1055 return count;
1056 }
1057
1058 static DRIVER_ATTR(debug_level, S_IWUSR | S_IRUGO,
1059 tpacpi_driver_debug_show, tpacpi_driver_debug_store);
1060
1061 /* version ------------------------------------------------------------- */
1062 static ssize_t tpacpi_driver_version_show(struct device_driver *drv,
1063 char *buf)
1064 {
1065 return snprintf(buf, PAGE_SIZE, "%s v%s\n",
1066 TPACPI_DESC, TPACPI_VERSION);
1067 }
1068
1069 static DRIVER_ATTR(version, S_IRUGO,
1070 tpacpi_driver_version_show, NULL);
1071
1072 /* --------------------------------------------------------------------- */
1073
1074 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
1075
1076 static void tpacpi_send_radiosw_update(void);
1077
1078 /* wlsw_emulstate ------------------------------------------------------ */
1079 static ssize_t tpacpi_driver_wlsw_emulstate_show(struct device_driver *drv,
1080 char *buf)
1081 {
1082 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_wlsw_emulstate);
1083 }
1084
1085 static ssize_t tpacpi_driver_wlsw_emulstate_store(struct device_driver *drv,
1086 const char *buf, size_t count)
1087 {
1088 unsigned long t;
1089
1090 if (parse_strtoul(buf, 1, &t))
1091 return -EINVAL;
1092
1093 if (tpacpi_wlsw_emulstate != t) {
1094 tpacpi_wlsw_emulstate = !!t;
1095 tpacpi_send_radiosw_update();
1096 } else
1097 tpacpi_wlsw_emulstate = !!t;
1098
1099 return count;
1100 }
1101
1102 static DRIVER_ATTR(wlsw_emulstate, S_IWUSR | S_IRUGO,
1103 tpacpi_driver_wlsw_emulstate_show,
1104 tpacpi_driver_wlsw_emulstate_store);
1105
1106 /* bluetooth_emulstate ------------------------------------------------- */
1107 static ssize_t tpacpi_driver_bluetooth_emulstate_show(
1108 struct device_driver *drv,
1109 char *buf)
1110 {
1111 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_bluetooth_emulstate);
1112 }
1113
1114 static ssize_t tpacpi_driver_bluetooth_emulstate_store(
1115 struct device_driver *drv,
1116 const char *buf, size_t count)
1117 {
1118 unsigned long t;
1119
1120 if (parse_strtoul(buf, 1, &t))
1121 return -EINVAL;
1122
1123 tpacpi_bluetooth_emulstate = !!t;
1124
1125 return count;
1126 }
1127
1128 static DRIVER_ATTR(bluetooth_emulstate, S_IWUSR | S_IRUGO,
1129 tpacpi_driver_bluetooth_emulstate_show,
1130 tpacpi_driver_bluetooth_emulstate_store);
1131
1132 /* wwan_emulstate ------------------------------------------------- */
1133 static ssize_t tpacpi_driver_wwan_emulstate_show(
1134 struct device_driver *drv,
1135 char *buf)
1136 {
1137 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_wwan_emulstate);
1138 }
1139
1140 static ssize_t tpacpi_driver_wwan_emulstate_store(
1141 struct device_driver *drv,
1142 const char *buf, size_t count)
1143 {
1144 unsigned long t;
1145
1146 if (parse_strtoul(buf, 1, &t))
1147 return -EINVAL;
1148
1149 tpacpi_wwan_emulstate = !!t;
1150
1151 return count;
1152 }
1153
1154 static DRIVER_ATTR(wwan_emulstate, S_IWUSR | S_IRUGO,
1155 tpacpi_driver_wwan_emulstate_show,
1156 tpacpi_driver_wwan_emulstate_store);
1157
1158 /* uwb_emulstate ------------------------------------------------- */
1159 static ssize_t tpacpi_driver_uwb_emulstate_show(
1160 struct device_driver *drv,
1161 char *buf)
1162 {
1163 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_uwb_emulstate);
1164 }
1165
1166 static ssize_t tpacpi_driver_uwb_emulstate_store(
1167 struct device_driver *drv,
1168 const char *buf, size_t count)
1169 {
1170 unsigned long t;
1171
1172 if (parse_strtoul(buf, 1, &t))
1173 return -EINVAL;
1174
1175 tpacpi_uwb_emulstate = !!t;
1176
1177 return count;
1178 }
1179
1180 static DRIVER_ATTR(uwb_emulstate, S_IWUSR | S_IRUGO,
1181 tpacpi_driver_uwb_emulstate_show,
1182 tpacpi_driver_uwb_emulstate_store);
1183 #endif
1184
1185 /* --------------------------------------------------------------------- */
1186
1187 static struct driver_attribute *tpacpi_driver_attributes[] = {
1188 &driver_attr_debug_level, &driver_attr_version,
1189 &driver_attr_interface_version,
1190 };
1191
1192 static int __init tpacpi_create_driver_attributes(struct device_driver *drv)
1193 {
1194 int i, res;
1195
1196 i = 0;
1197 res = 0;
1198 while (!res && i < ARRAY_SIZE(tpacpi_driver_attributes)) {
1199 res = driver_create_file(drv, tpacpi_driver_attributes[i]);
1200 i++;
1201 }
1202
1203 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
1204 if (!res && dbg_wlswemul)
1205 res = driver_create_file(drv, &driver_attr_wlsw_emulstate);
1206 if (!res && dbg_bluetoothemul)
1207 res = driver_create_file(drv, &driver_attr_bluetooth_emulstate);
1208 if (!res && dbg_wwanemul)
1209 res = driver_create_file(drv, &driver_attr_wwan_emulstate);
1210 if (!res && dbg_uwbemul)
1211 res = driver_create_file(drv, &driver_attr_uwb_emulstate);
1212 #endif
1213
1214 return res;
1215 }
1216
1217 static void tpacpi_remove_driver_attributes(struct device_driver *drv)
1218 {
1219 int i;
1220
1221 for (i = 0; i < ARRAY_SIZE(tpacpi_driver_attributes); i++)
1222 driver_remove_file(drv, tpacpi_driver_attributes[i]);
1223
1224 #ifdef THINKPAD_ACPI_DEBUGFACILITIES
1225 driver_remove_file(drv, &driver_attr_wlsw_emulstate);
1226 driver_remove_file(drv, &driver_attr_bluetooth_emulstate);
1227 driver_remove_file(drv, &driver_attr_wwan_emulstate);
1228 driver_remove_file(drv, &driver_attr_uwb_emulstate);
1229 #endif
1230 }
1231
1232 /****************************************************************************
1233 ****************************************************************************
1234 *
1235 * Subdrivers
1236 *
1237 ****************************************************************************
1238 ****************************************************************************/
1239
1240 /*************************************************************************
1241 * thinkpad-acpi init subdriver
1242 */
1243
1244 static int __init thinkpad_acpi_driver_init(struct ibm_init_struct *iibm)
1245 {
1246 printk(TPACPI_INFO "%s v%s\n", TPACPI_DESC, TPACPI_VERSION);
1247 printk(TPACPI_INFO "%s\n", TPACPI_URL);
1248
1249 printk(TPACPI_INFO "ThinkPad BIOS %s, EC %s\n",
1250 (thinkpad_id.bios_version_str) ?
1251 thinkpad_id.bios_version_str : "unknown",
1252 (thinkpad_id.ec_version_str) ?
1253 thinkpad_id.ec_version_str : "unknown");
1254
1255 if (thinkpad_id.vendor && thinkpad_id.model_str)
1256 printk(TPACPI_INFO "%s %s, model %s\n",
1257 (thinkpad_id.vendor == PCI_VENDOR_ID_IBM) ?
1258 "IBM" : ((thinkpad_id.vendor ==
1259 PCI_VENDOR_ID_LENOVO) ?
1260 "Lenovo" : "Unknown vendor"),
1261 thinkpad_id.model_str,
1262 (thinkpad_id.nummodel_str) ?
1263 thinkpad_id.nummodel_str : "unknown");
1264
1265 return 0;
1266 }
1267
1268 static int thinkpad_acpi_driver_read(char *p)
1269 {
1270 int len = 0;
1271
1272 len += sprintf(p + len, "driver:\t\t%s\n", TPACPI_DESC);
1273 len += sprintf(p + len, "version:\t%s\n", TPACPI_VERSION);
1274
1275 return len;
1276 }
1277
1278 static struct ibm_struct thinkpad_acpi_driver_data = {
1279 .name = "driver",
1280 .read = thinkpad_acpi_driver_read,
1281 };
1282
1283 /*************************************************************************
1284 * Hotkey subdriver
1285 */
1286
1287 enum { /* hot key scan codes (derived from ACPI DSDT) */
1288 TP_ACPI_HOTKEYSCAN_FNF1 = 0,
1289 TP_ACPI_HOTKEYSCAN_FNF2,
1290 TP_ACPI_HOTKEYSCAN_FNF3,
1291 TP_ACPI_HOTKEYSCAN_FNF4,
1292 TP_ACPI_HOTKEYSCAN_FNF5,
1293 TP_ACPI_HOTKEYSCAN_FNF6,
1294 TP_ACPI_HOTKEYSCAN_FNF7,
1295 TP_ACPI_HOTKEYSCAN_FNF8,
1296 TP_ACPI_HOTKEYSCAN_FNF9,
1297 TP_ACPI_HOTKEYSCAN_FNF10,
1298 TP_ACPI_HOTKEYSCAN_FNF11,
1299 TP_ACPI_HOTKEYSCAN_FNF12,
1300 TP_ACPI_HOTKEYSCAN_FNBACKSPACE,
1301 TP_ACPI_HOTKEYSCAN_FNINSERT,
1302 TP_ACPI_HOTKEYSCAN_FNDELETE,
1303 TP_ACPI_HOTKEYSCAN_FNHOME,
1304 TP_ACPI_HOTKEYSCAN_FNEND,
1305 TP_ACPI_HOTKEYSCAN_FNPAGEUP,
1306 TP_ACPI_HOTKEYSCAN_FNPAGEDOWN,
1307 TP_ACPI_HOTKEYSCAN_FNSPACE,
1308 TP_ACPI_HOTKEYSCAN_VOLUMEUP,
1309 TP_ACPI_HOTKEYSCAN_VOLUMEDOWN,
1310 TP_ACPI_HOTKEYSCAN_MUTE,
1311 TP_ACPI_HOTKEYSCAN_THINKPAD,
1312 };
1313
1314 enum { /* Keys available through NVRAM polling */
1315 TPACPI_HKEY_NVRAM_KNOWN_MASK = 0x00fb88c0U,
1316 TPACPI_HKEY_NVRAM_GOOD_MASK = 0x00fb8000U,
1317 };
1318
1319 enum { /* Positions of some of the keys in hotkey masks */
1320 TP_ACPI_HKEY_DISPSWTCH_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF7,
1321 TP_ACPI_HKEY_DISPXPAND_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF8,
1322 TP_ACPI_HKEY_HIBERNATE_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF12,
1323 TP_ACPI_HKEY_BRGHTUP_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNHOME,
1324 TP_ACPI_HKEY_BRGHTDWN_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNEND,
1325 TP_ACPI_HKEY_THNKLGHT_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNPAGEUP,
1326 TP_ACPI_HKEY_ZOOM_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNSPACE,
1327 TP_ACPI_HKEY_VOLUP_MASK = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEUP,
1328 TP_ACPI_HKEY_VOLDWN_MASK = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEDOWN,
1329 TP_ACPI_HKEY_MUTE_MASK = 1 << TP_ACPI_HOTKEYSCAN_MUTE,
1330 TP_ACPI_HKEY_THINKPAD_MASK = 1 << TP_ACPI_HOTKEYSCAN_THINKPAD,
1331 };
1332
1333 enum { /* NVRAM to ACPI HKEY group map */
1334 TP_NVRAM_HKEY_GROUP_HK2 = TP_ACPI_HKEY_THINKPAD_MASK |
1335 TP_ACPI_HKEY_ZOOM_MASK |
1336 TP_ACPI_HKEY_DISPSWTCH_MASK |
1337 TP_ACPI_HKEY_HIBERNATE_MASK,
1338 TP_NVRAM_HKEY_GROUP_BRIGHTNESS = TP_ACPI_HKEY_BRGHTUP_MASK |
1339 TP_ACPI_HKEY_BRGHTDWN_MASK,
1340 TP_NVRAM_HKEY_GROUP_VOLUME = TP_ACPI_HKEY_VOLUP_MASK |
1341 TP_ACPI_HKEY_VOLDWN_MASK |
1342 TP_ACPI_HKEY_MUTE_MASK,
1343 };
1344
1345 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1346 struct tp_nvram_state {
1347 u16 thinkpad_toggle:1;
1348 u16 zoom_toggle:1;
1349 u16 display_toggle:1;
1350 u16 thinklight_toggle:1;
1351 u16 hibernate_toggle:1;
1352 u16 displayexp_toggle:1;
1353 u16 display_state:1;
1354 u16 brightness_toggle:1;
1355 u16 volume_toggle:1;
1356 u16 mute:1;
1357
1358 u8 brightness_level;
1359 u8 volume_level;
1360 };
1361
1362 static struct task_struct *tpacpi_hotkey_task;
1363 static u32 hotkey_source_mask; /* bit mask 0=ACPI,1=NVRAM */
1364 static int hotkey_poll_freq = 10; /* Hz */
1365 static struct mutex hotkey_thread_mutex;
1366 static struct mutex hotkey_thread_data_mutex;
1367 static unsigned int hotkey_config_change;
1368
1369 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1370
1371 #define hotkey_source_mask 0U
1372
1373 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1374
1375 static struct mutex hotkey_mutex;
1376
1377 static enum { /* Reasons for waking up */
1378 TP_ACPI_WAKEUP_NONE = 0, /* None or unknown */
1379 TP_ACPI_WAKEUP_BAYEJ, /* Bay ejection request */
1380 TP_ACPI_WAKEUP_UNDOCK, /* Undock request */
1381 } hotkey_wakeup_reason;
1382
1383 static int hotkey_autosleep_ack;
1384
1385 static int hotkey_orig_status;
1386 static u32 hotkey_orig_mask;
1387 static u32 hotkey_all_mask;
1388 static u32 hotkey_reserved_mask;
1389 static u32 hotkey_mask;
1390
1391 static unsigned int hotkey_report_mode;
1392
1393 static u16 *hotkey_keycode_map;
1394
1395 static struct attribute_set *hotkey_dev_attributes;
1396
1397 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1398 #define HOTKEY_CONFIG_CRITICAL_START \
1399 do { \
1400 mutex_lock(&hotkey_thread_data_mutex); \
1401 hotkey_config_change++; \
1402 } while (0);
1403 #define HOTKEY_CONFIG_CRITICAL_END \
1404 mutex_unlock(&hotkey_thread_data_mutex);
1405 #else
1406 #define HOTKEY_CONFIG_CRITICAL_START
1407 #define HOTKEY_CONFIG_CRITICAL_END
1408 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1409
1410 /* HKEY.MHKG() return bits */
1411 #define TP_HOTKEY_TABLET_MASK (1 << 3)
1412
1413 static int hotkey_get_wlsw(int *status)
1414 {
1415 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
1416 if (dbg_wlswemul) {
1417 *status = !!tpacpi_wlsw_emulstate;
1418 return 0;
1419 }
1420 #endif
1421 if (!acpi_evalf(hkey_handle, status, "WLSW", "d"))
1422 return -EIO;
1423 return 0;
1424 }
1425
1426 static int hotkey_get_tablet_mode(int *status)
1427 {
1428 int s;
1429
1430 if (!acpi_evalf(hkey_handle, &s, "MHKG", "d"))
1431 return -EIO;
1432
1433 *status = ((s & TP_HOTKEY_TABLET_MASK) != 0);
1434 return 0;
1435 }
1436
1437 /*
1438 * Call with hotkey_mutex held
1439 */
1440 static int hotkey_mask_get(void)
1441 {
1442 u32 m = 0;
1443
1444 if (tp_features.hotkey_mask) {
1445 if (!acpi_evalf(hkey_handle, &m, "DHKN", "d"))
1446 return -EIO;
1447 }
1448 hotkey_mask = m | (hotkey_source_mask & hotkey_mask);
1449
1450 return 0;
1451 }
1452
1453 /*
1454 * Call with hotkey_mutex held
1455 */
1456 static int hotkey_mask_set(u32 mask)
1457 {
1458 int i;
1459 int rc = 0;
1460
1461 if (tp_features.hotkey_mask) {
1462 if (!tp_warned.hotkey_mask_ff &&
1463 (mask == 0xffff || mask == 0xffffff ||
1464 mask == 0xffffffff)) {
1465 tp_warned.hotkey_mask_ff = 1;
1466 printk(TPACPI_NOTICE
1467 "setting the hotkey mask to 0x%08x is likely "
1468 "not the best way to go about it\n", mask);
1469 printk(TPACPI_NOTICE
1470 "please consider using the driver defaults, "
1471 "and refer to up-to-date thinkpad-acpi "
1472 "documentation\n");
1473 }
1474
1475 HOTKEY_CONFIG_CRITICAL_START
1476 for (i = 0; i < 32; i++) {
1477 u32 m = 1 << i;
1478 /* enable in firmware mask only keys not in NVRAM
1479 * mode, but enable the key in the cached hotkey_mask
1480 * regardless of mode, or the key will end up
1481 * disabled by hotkey_mask_get() */
1482 if (!acpi_evalf(hkey_handle,
1483 NULL, "MHKM", "vdd", i + 1,
1484 !!((mask & ~hotkey_source_mask) & m))) {
1485 rc = -EIO;
1486 break;
1487 } else {
1488 hotkey_mask = (hotkey_mask & ~m) | (mask & m);
1489 }
1490 }
1491 HOTKEY_CONFIG_CRITICAL_END
1492
1493 /* hotkey_mask_get must be called unconditionally below */
1494 if (!hotkey_mask_get() && !rc &&
1495 (hotkey_mask & ~hotkey_source_mask) !=
1496 (mask & ~hotkey_source_mask)) {
1497 printk(TPACPI_NOTICE
1498 "requested hot key mask 0x%08x, but "
1499 "firmware forced it to 0x%08x\n",
1500 mask, hotkey_mask);
1501 }
1502 } else {
1503 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1504 HOTKEY_CONFIG_CRITICAL_START
1505 hotkey_mask = mask & hotkey_source_mask;
1506 HOTKEY_CONFIG_CRITICAL_END
1507 hotkey_mask_get();
1508 if (hotkey_mask != mask) {
1509 printk(TPACPI_NOTICE
1510 "requested hot key mask 0x%08x, "
1511 "forced to 0x%08x (NVRAM poll mask is "
1512 "0x%08x): no firmware mask support\n",
1513 mask, hotkey_mask, hotkey_source_mask);
1514 }
1515 #else
1516 hotkey_mask_get();
1517 rc = -ENXIO;
1518 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1519 }
1520
1521 return rc;
1522 }
1523
1524 static int hotkey_status_get(int *status)
1525 {
1526 if (!acpi_evalf(hkey_handle, status, "DHKC", "d"))
1527 return -EIO;
1528
1529 return 0;
1530 }
1531
1532 static int hotkey_status_set(int status)
1533 {
1534 if (!acpi_evalf(hkey_handle, NULL, "MHKC", "vd", status))
1535 return -EIO;
1536
1537 return 0;
1538 }
1539
1540 static void tpacpi_input_send_tabletsw(void)
1541 {
1542 int state;
1543
1544 if (tp_features.hotkey_tablet &&
1545 !hotkey_get_tablet_mode(&state)) {
1546 mutex_lock(&tpacpi_inputdev_send_mutex);
1547
1548 input_report_switch(tpacpi_inputdev,
1549 SW_TABLET_MODE, !!state);
1550 input_sync(tpacpi_inputdev);
1551
1552 mutex_unlock(&tpacpi_inputdev_send_mutex);
1553 }
1554 }
1555
1556 static void tpacpi_input_send_key(unsigned int scancode)
1557 {
1558 unsigned int keycode;
1559
1560 keycode = hotkey_keycode_map[scancode];
1561
1562 if (keycode != KEY_RESERVED) {
1563 mutex_lock(&tpacpi_inputdev_send_mutex);
1564
1565 input_report_key(tpacpi_inputdev, keycode, 1);
1566 if (keycode == KEY_UNKNOWN)
1567 input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN,
1568 scancode);
1569 input_sync(tpacpi_inputdev);
1570
1571 input_report_key(tpacpi_inputdev, keycode, 0);
1572 if (keycode == KEY_UNKNOWN)
1573 input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN,
1574 scancode);
1575 input_sync(tpacpi_inputdev);
1576
1577 mutex_unlock(&tpacpi_inputdev_send_mutex);
1578 }
1579 }
1580
1581 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1582 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver;
1583
1584 static void tpacpi_hotkey_send_key(unsigned int scancode)
1585 {
1586 tpacpi_input_send_key(scancode);
1587 if (hotkey_report_mode < 2) {
1588 acpi_bus_generate_proc_event(ibm_hotkey_acpidriver.device,
1589 0x80, 0x1001 + scancode);
1590 }
1591 }
1592
1593 static void hotkey_read_nvram(struct tp_nvram_state *n, u32 m)
1594 {
1595 u8 d;
1596
1597 if (m & TP_NVRAM_HKEY_GROUP_HK2) {
1598 d = nvram_read_byte(TP_NVRAM_ADDR_HK2);
1599 n->thinkpad_toggle = !!(d & TP_NVRAM_MASK_HKT_THINKPAD);
1600 n->zoom_toggle = !!(d & TP_NVRAM_MASK_HKT_ZOOM);
1601 n->display_toggle = !!(d & TP_NVRAM_MASK_HKT_DISPLAY);
1602 n->hibernate_toggle = !!(d & TP_NVRAM_MASK_HKT_HIBERNATE);
1603 }
1604 if (m & TP_ACPI_HKEY_THNKLGHT_MASK) {
1605 d = nvram_read_byte(TP_NVRAM_ADDR_THINKLIGHT);
1606 n->thinklight_toggle = !!(d & TP_NVRAM_MASK_THINKLIGHT);
1607 }
1608 if (m & TP_ACPI_HKEY_DISPXPAND_MASK) {
1609 d = nvram_read_byte(TP_NVRAM_ADDR_VIDEO);
1610 n->displayexp_toggle =
1611 !!(d & TP_NVRAM_MASK_HKT_DISPEXPND);
1612 }
1613 if (m & TP_NVRAM_HKEY_GROUP_BRIGHTNESS) {
1614 d = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS);
1615 n->brightness_level = (d & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
1616 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
1617 n->brightness_toggle =
1618 !!(d & TP_NVRAM_MASK_HKT_BRIGHTNESS);
1619 }
1620 if (m & TP_NVRAM_HKEY_GROUP_VOLUME) {
1621 d = nvram_read_byte(TP_NVRAM_ADDR_MIXER);
1622 n->volume_level = (d & TP_NVRAM_MASK_LEVEL_VOLUME)
1623 >> TP_NVRAM_POS_LEVEL_VOLUME;
1624 n->mute = !!(d & TP_NVRAM_MASK_MUTE);
1625 n->volume_toggle = !!(d & TP_NVRAM_MASK_HKT_VOLUME);
1626 }
1627 }
1628
1629 #define TPACPI_COMPARE_KEY(__scancode, __member) \
1630 do { \
1631 if ((mask & (1 << __scancode)) && \
1632 oldn->__member != newn->__member) \
1633 tpacpi_hotkey_send_key(__scancode); \
1634 } while (0)
1635
1636 #define TPACPI_MAY_SEND_KEY(__scancode) \
1637 do { if (mask & (1 << __scancode)) \
1638 tpacpi_hotkey_send_key(__scancode); } while (0)
1639
1640 static void hotkey_compare_and_issue_event(struct tp_nvram_state *oldn,
1641 struct tp_nvram_state *newn,
1642 u32 mask)
1643 {
1644 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_THINKPAD, thinkpad_toggle);
1645 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNSPACE, zoom_toggle);
1646 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF7, display_toggle);
1647 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF12, hibernate_toggle);
1648
1649 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNPAGEUP, thinklight_toggle);
1650
1651 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF8, displayexp_toggle);
1652
1653 /* handle volume */
1654 if (oldn->volume_toggle != newn->volume_toggle) {
1655 if (oldn->mute != newn->mute) {
1656 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE);
1657 }
1658 if (oldn->volume_level > newn->volume_level) {
1659 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
1660 } else if (oldn->volume_level < newn->volume_level) {
1661 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
1662 } else if (oldn->mute == newn->mute) {
1663 /* repeated key presses that didn't change state */
1664 if (newn->mute) {
1665 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE);
1666 } else if (newn->volume_level != 0) {
1667 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
1668 } else {
1669 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
1670 }
1671 }
1672 }
1673
1674 /* handle brightness */
1675 if (oldn->brightness_toggle != newn->brightness_toggle) {
1676 if (oldn->brightness_level < newn->brightness_level) {
1677 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
1678 } else if (oldn->brightness_level > newn->brightness_level) {
1679 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
1680 } else {
1681 /* repeated key presses that didn't change state */
1682 if (newn->brightness_level != 0) {
1683 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
1684 } else {
1685 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
1686 }
1687 }
1688 }
1689 }
1690
1691 #undef TPACPI_COMPARE_KEY
1692 #undef TPACPI_MAY_SEND_KEY
1693
1694 static int hotkey_kthread(void *data)
1695 {
1696 struct tp_nvram_state s[2];
1697 u32 mask;
1698 unsigned int si, so;
1699 unsigned long t;
1700 unsigned int change_detector, must_reset;
1701
1702 mutex_lock(&hotkey_thread_mutex);
1703
1704 if (tpacpi_lifecycle == TPACPI_LIFE_EXITING)
1705 goto exit;
1706
1707 set_freezable();
1708
1709 so = 0;
1710 si = 1;
1711 t = 0;
1712
1713 /* Initial state for compares */
1714 mutex_lock(&hotkey_thread_data_mutex);
1715 change_detector = hotkey_config_change;
1716 mask = hotkey_source_mask & hotkey_mask;
1717 mutex_unlock(&hotkey_thread_data_mutex);
1718 hotkey_read_nvram(&s[so], mask);
1719
1720 while (!kthread_should_stop() && hotkey_poll_freq) {
1721 if (t == 0)
1722 t = 1000/hotkey_poll_freq;
1723 t = msleep_interruptible(t);
1724 if (unlikely(kthread_should_stop()))
1725 break;
1726 must_reset = try_to_freeze();
1727 if (t > 0 && !must_reset)
1728 continue;
1729
1730 mutex_lock(&hotkey_thread_data_mutex);
1731 if (must_reset || hotkey_config_change != change_detector) {
1732 /* forget old state on thaw or config change */
1733 si = so;
1734 t = 0;
1735 change_detector = hotkey_config_change;
1736 }
1737 mask = hotkey_source_mask & hotkey_mask;
1738 mutex_unlock(&hotkey_thread_data_mutex);
1739
1740 if (likely(mask)) {
1741 hotkey_read_nvram(&s[si], mask);
1742 if (likely(si != so)) {
1743 hotkey_compare_and_issue_event(&s[so], &s[si],
1744 mask);
1745 }
1746 }
1747
1748 so = si;
1749 si ^= 1;
1750 }
1751
1752 exit:
1753 mutex_unlock(&hotkey_thread_mutex);
1754 return 0;
1755 }
1756
1757 static void hotkey_poll_stop_sync(void)
1758 {
1759 if (tpacpi_hotkey_task) {
1760 if (frozen(tpacpi_hotkey_task) ||
1761 freezing(tpacpi_hotkey_task))
1762 thaw_process(tpacpi_hotkey_task);
1763
1764 kthread_stop(tpacpi_hotkey_task);
1765 tpacpi_hotkey_task = NULL;
1766 mutex_lock(&hotkey_thread_mutex);
1767 /* at this point, the thread did exit */
1768 mutex_unlock(&hotkey_thread_mutex);
1769 }
1770 }
1771
1772 /* call with hotkey_mutex held */
1773 static void hotkey_poll_setup(int may_warn)
1774 {
1775 if ((hotkey_source_mask & hotkey_mask) != 0 &&
1776 hotkey_poll_freq > 0 &&
1777 (tpacpi_inputdev->users > 0 || hotkey_report_mode < 2)) {
1778 if (!tpacpi_hotkey_task) {
1779 tpacpi_hotkey_task = kthread_run(hotkey_kthread,
1780 NULL, TPACPI_NVRAM_KTHREAD_NAME);
1781 if (IS_ERR(tpacpi_hotkey_task)) {
1782 tpacpi_hotkey_task = NULL;
1783 printk(TPACPI_ERR
1784 "could not create kernel thread "
1785 "for hotkey polling\n");
1786 }
1787 }
1788 } else {
1789 hotkey_poll_stop_sync();
1790 if (may_warn &&
1791 hotkey_source_mask != 0 && hotkey_poll_freq == 0) {
1792 printk(TPACPI_NOTICE
1793 "hot keys 0x%08x require polling, "
1794 "which is currently disabled\n",
1795 hotkey_source_mask);
1796 }
1797 }
1798 }
1799
1800 static void hotkey_poll_setup_safe(int may_warn)
1801 {
1802 mutex_lock(&hotkey_mutex);
1803 hotkey_poll_setup(may_warn);
1804 mutex_unlock(&hotkey_mutex);
1805 }
1806
1807 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1808
1809 static void hotkey_poll_setup_safe(int __unused)
1810 {
1811 }
1812
1813 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1814
1815 static int hotkey_inputdev_open(struct input_dev *dev)
1816 {
1817 switch (tpacpi_lifecycle) {
1818 case TPACPI_LIFE_INIT:
1819 /*
1820 * hotkey_init will call hotkey_poll_setup_safe
1821 * at the appropriate moment
1822 */
1823 return 0;
1824 case TPACPI_LIFE_EXITING:
1825 return -EBUSY;
1826 case TPACPI_LIFE_RUNNING:
1827 hotkey_poll_setup_safe(0);
1828 return 0;
1829 }
1830
1831 /* Should only happen if tpacpi_lifecycle is corrupt */
1832 BUG();
1833 return -EBUSY;
1834 }
1835
1836 static void hotkey_inputdev_close(struct input_dev *dev)
1837 {
1838 /* disable hotkey polling when possible */
1839 if (tpacpi_lifecycle == TPACPI_LIFE_RUNNING)
1840 hotkey_poll_setup_safe(0);
1841 }
1842
1843 /* sysfs hotkey enable ------------------------------------------------- */
1844 static ssize_t hotkey_enable_show(struct device *dev,
1845 struct device_attribute *attr,
1846 char *buf)
1847 {
1848 int res, status;
1849
1850 res = hotkey_status_get(&status);
1851 if (res)
1852 return res;
1853
1854 return snprintf(buf, PAGE_SIZE, "%d\n", status);
1855 }
1856
1857 static ssize_t hotkey_enable_store(struct device *dev,
1858 struct device_attribute *attr,
1859 const char *buf, size_t count)
1860 {
1861 unsigned long t;
1862 int res;
1863
1864 if (parse_strtoul(buf, 1, &t))
1865 return -EINVAL;
1866
1867 res = hotkey_status_set(t);
1868
1869 return (res) ? res : count;
1870 }
1871
1872 static struct device_attribute dev_attr_hotkey_enable =
1873 __ATTR(hotkey_enable, S_IWUSR | S_IRUGO,
1874 hotkey_enable_show, hotkey_enable_store);
1875
1876 /* sysfs hotkey mask --------------------------------------------------- */
1877 static ssize_t hotkey_mask_show(struct device *dev,
1878 struct device_attribute *attr,
1879 char *buf)
1880 {
1881 int res;
1882
1883 if (mutex_lock_killable(&hotkey_mutex))
1884 return -ERESTARTSYS;
1885 res = hotkey_mask_get();
1886 mutex_unlock(&hotkey_mutex);
1887
1888 return (res)?
1889 res : snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_mask);
1890 }
1891
1892 static ssize_t hotkey_mask_store(struct device *dev,
1893 struct device_attribute *attr,
1894 const char *buf, size_t count)
1895 {
1896 unsigned long t;
1897 int res;
1898
1899 if (parse_strtoul(buf, 0xffffffffUL, &t))
1900 return -EINVAL;
1901
1902 if (mutex_lock_killable(&hotkey_mutex))
1903 return -ERESTARTSYS;
1904
1905 res = hotkey_mask_set(t);
1906
1907 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1908 hotkey_poll_setup(1);
1909 #endif
1910
1911 mutex_unlock(&hotkey_mutex);
1912
1913 return (res) ? res : count;
1914 }
1915
1916 static struct device_attribute dev_attr_hotkey_mask =
1917 __ATTR(hotkey_mask, S_IWUSR | S_IRUGO,
1918 hotkey_mask_show, hotkey_mask_store);
1919
1920 /* sysfs hotkey bios_enabled ------------------------------------------- */
1921 static ssize_t hotkey_bios_enabled_show(struct device *dev,
1922 struct device_attribute *attr,
1923 char *buf)
1924 {
1925 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_orig_status);
1926 }
1927
1928 static struct device_attribute dev_attr_hotkey_bios_enabled =
1929 __ATTR(hotkey_bios_enabled, S_IRUGO, hotkey_bios_enabled_show, NULL);
1930
1931 /* sysfs hotkey bios_mask ---------------------------------------------- */
1932 static ssize_t hotkey_bios_mask_show(struct device *dev,
1933 struct device_attribute *attr,
1934 char *buf)
1935 {
1936 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_orig_mask);
1937 }
1938
1939 static struct device_attribute dev_attr_hotkey_bios_mask =
1940 __ATTR(hotkey_bios_mask, S_IRUGO, hotkey_bios_mask_show, NULL);
1941
1942 /* sysfs hotkey all_mask ----------------------------------------------- */
1943 static ssize_t hotkey_all_mask_show(struct device *dev,
1944 struct device_attribute *attr,
1945 char *buf)
1946 {
1947 return snprintf(buf, PAGE_SIZE, "0x%08x\n",
1948 hotkey_all_mask | hotkey_source_mask);
1949 }
1950
1951 static struct device_attribute dev_attr_hotkey_all_mask =
1952 __ATTR(hotkey_all_mask, S_IRUGO, hotkey_all_mask_show, NULL);
1953
1954 /* sysfs hotkey recommended_mask --------------------------------------- */
1955 static ssize_t hotkey_recommended_mask_show(struct device *dev,
1956 struct device_attribute *attr,
1957 char *buf)
1958 {
1959 return snprintf(buf, PAGE_SIZE, "0x%08x\n",
1960 (hotkey_all_mask | hotkey_source_mask)
1961 & ~hotkey_reserved_mask);
1962 }
1963
1964 static struct device_attribute dev_attr_hotkey_recommended_mask =
1965 __ATTR(hotkey_recommended_mask, S_IRUGO,
1966 hotkey_recommended_mask_show, NULL);
1967
1968 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1969
1970 /* sysfs hotkey hotkey_source_mask ------------------------------------- */
1971 static ssize_t hotkey_source_mask_show(struct device *dev,
1972 struct device_attribute *attr,
1973 char *buf)
1974 {
1975 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_source_mask);
1976 }
1977
1978 static ssize_t hotkey_source_mask_store(struct device *dev,
1979 struct device_attribute *attr,
1980 const char *buf, size_t count)
1981 {
1982 unsigned long t;
1983
1984 if (parse_strtoul(buf, 0xffffffffUL, &t) ||
1985 ((t & ~TPACPI_HKEY_NVRAM_KNOWN_MASK) != 0))
1986 return -EINVAL;
1987
1988 if (mutex_lock_killable(&hotkey_mutex))
1989 return -ERESTARTSYS;
1990
1991 HOTKEY_CONFIG_CRITICAL_START
1992 hotkey_source_mask = t;
1993 HOTKEY_CONFIG_CRITICAL_END
1994
1995 hotkey_poll_setup(1);
1996
1997 mutex_unlock(&hotkey_mutex);
1998
1999 return count;
2000 }
2001
2002 static struct device_attribute dev_attr_hotkey_source_mask =
2003 __ATTR(hotkey_source_mask, S_IWUSR | S_IRUGO,
2004 hotkey_source_mask_show, hotkey_source_mask_store);
2005
2006 /* sysfs hotkey hotkey_poll_freq --------------------------------------- */
2007 static ssize_t hotkey_poll_freq_show(struct device *dev,
2008 struct device_attribute *attr,
2009 char *buf)
2010 {
2011 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_poll_freq);
2012 }
2013
2014 static ssize_t hotkey_poll_freq_store(struct device *dev,
2015 struct device_attribute *attr,
2016 const char *buf, size_t count)
2017 {
2018 unsigned long t;
2019
2020 if (parse_strtoul(buf, 25, &t))
2021 return -EINVAL;
2022
2023 if (mutex_lock_killable(&hotkey_mutex))
2024 return -ERESTARTSYS;
2025
2026 hotkey_poll_freq = t;
2027
2028 hotkey_poll_setup(1);
2029 mutex_unlock(&hotkey_mutex);
2030
2031 return count;
2032 }
2033
2034 static struct device_attribute dev_attr_hotkey_poll_freq =
2035 __ATTR(hotkey_poll_freq, S_IWUSR | S_IRUGO,
2036 hotkey_poll_freq_show, hotkey_poll_freq_store);
2037
2038 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2039
2040 /* sysfs hotkey radio_sw (pollable) ------------------------------------ */
2041 static ssize_t hotkey_radio_sw_show(struct device *dev,
2042 struct device_attribute *attr,
2043 char *buf)
2044 {
2045 int res, s;
2046 res = hotkey_get_wlsw(&s);
2047 if (res < 0)
2048 return res;
2049
2050 return snprintf(buf, PAGE_SIZE, "%d\n", !!s);
2051 }
2052
2053 static struct device_attribute dev_attr_hotkey_radio_sw =
2054 __ATTR(hotkey_radio_sw, S_IRUGO, hotkey_radio_sw_show, NULL);
2055
2056 static void hotkey_radio_sw_notify_change(void)
2057 {
2058 if (tp_features.hotkey_wlsw)
2059 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2060 "hotkey_radio_sw");
2061 }
2062
2063 /* sysfs hotkey tablet mode (pollable) --------------------------------- */
2064 static ssize_t hotkey_tablet_mode_show(struct device *dev,
2065 struct device_attribute *attr,
2066 char *buf)
2067 {
2068 int res, s;
2069 res = hotkey_get_tablet_mode(&s);
2070 if (res < 0)
2071 return res;
2072
2073 return snprintf(buf, PAGE_SIZE, "%d\n", !!s);
2074 }
2075
2076 static struct device_attribute dev_attr_hotkey_tablet_mode =
2077 __ATTR(hotkey_tablet_mode, S_IRUGO, hotkey_tablet_mode_show, NULL);
2078
2079 static void hotkey_tablet_mode_notify_change(void)
2080 {
2081 if (tp_features.hotkey_tablet)
2082 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2083 "hotkey_tablet_mode");
2084 }
2085
2086 /* sysfs hotkey report_mode -------------------------------------------- */
2087 static ssize_t hotkey_report_mode_show(struct device *dev,
2088 struct device_attribute *attr,
2089 char *buf)
2090 {
2091 return snprintf(buf, PAGE_SIZE, "%d\n",
2092 (hotkey_report_mode != 0) ? hotkey_report_mode : 1);
2093 }
2094
2095 static struct device_attribute dev_attr_hotkey_report_mode =
2096 __ATTR(hotkey_report_mode, S_IRUGO, hotkey_report_mode_show, NULL);
2097
2098 /* sysfs wakeup reason (pollable) -------------------------------------- */
2099 static ssize_t hotkey_wakeup_reason_show(struct device *dev,
2100 struct device_attribute *attr,
2101 char *buf)
2102 {
2103 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_wakeup_reason);
2104 }
2105
2106 static struct device_attribute dev_attr_hotkey_wakeup_reason =
2107 __ATTR(wakeup_reason, S_IRUGO, hotkey_wakeup_reason_show, NULL);
2108
2109 static void hotkey_wakeup_reason_notify_change(void)
2110 {
2111 if (tp_features.hotkey_mask)
2112 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2113 "wakeup_reason");
2114 }
2115
2116 /* sysfs wakeup hotunplug_complete (pollable) -------------------------- */
2117 static ssize_t hotkey_wakeup_hotunplug_complete_show(struct device *dev,
2118 struct device_attribute *attr,
2119 char *buf)
2120 {
2121 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_autosleep_ack);
2122 }
2123
2124 static struct device_attribute dev_attr_hotkey_wakeup_hotunplug_complete =
2125 __ATTR(wakeup_hotunplug_complete, S_IRUGO,
2126 hotkey_wakeup_hotunplug_complete_show, NULL);
2127
2128 static void hotkey_wakeup_hotunplug_complete_notify_change(void)
2129 {
2130 if (tp_features.hotkey_mask)
2131 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2132 "wakeup_hotunplug_complete");
2133 }
2134
2135 /* --------------------------------------------------------------------- */
2136
2137 static struct attribute *hotkey_attributes[] __initdata = {
2138 &dev_attr_hotkey_enable.attr,
2139 &dev_attr_hotkey_bios_enabled.attr,
2140 &dev_attr_hotkey_report_mode.attr,
2141 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2142 &dev_attr_hotkey_mask.attr,
2143 &dev_attr_hotkey_all_mask.attr,
2144 &dev_attr_hotkey_recommended_mask.attr,
2145 &dev_attr_hotkey_source_mask.attr,
2146 &dev_attr_hotkey_poll_freq.attr,
2147 #endif
2148 };
2149
2150 static struct attribute *hotkey_mask_attributes[] __initdata = {
2151 &dev_attr_hotkey_bios_mask.attr,
2152 #ifndef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2153 &dev_attr_hotkey_mask.attr,
2154 &dev_attr_hotkey_all_mask.attr,
2155 &dev_attr_hotkey_recommended_mask.attr,
2156 #endif
2157 &dev_attr_hotkey_wakeup_reason.attr,
2158 &dev_attr_hotkey_wakeup_hotunplug_complete.attr,
2159 };
2160
2161 static void bluetooth_update_rfk(void);
2162 static void wan_update_rfk(void);
2163 static void uwb_update_rfk(void);
2164 static void tpacpi_send_radiosw_update(void)
2165 {
2166 int wlsw;
2167
2168 /* Sync these BEFORE sending any rfkill events */
2169 if (tp_features.bluetooth)
2170 bluetooth_update_rfk();
2171 if (tp_features.wan)
2172 wan_update_rfk();
2173 if (tp_features.uwb)
2174 uwb_update_rfk();
2175
2176 if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&wlsw)) {
2177 mutex_lock(&tpacpi_inputdev_send_mutex);
2178
2179 input_report_switch(tpacpi_inputdev,
2180 SW_RFKILL_ALL, !!wlsw);
2181 input_sync(tpacpi_inputdev);
2182
2183 mutex_unlock(&tpacpi_inputdev_send_mutex);
2184 }
2185 hotkey_radio_sw_notify_change();
2186 }
2187
2188 static void hotkey_exit(void)
2189 {
2190 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2191 hotkey_poll_stop_sync();
2192 #endif
2193
2194 if (hotkey_dev_attributes)
2195 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
2196
2197 kfree(hotkey_keycode_map);
2198
2199 if (tp_features.hotkey) {
2200 dbg_printk(TPACPI_DBG_EXIT,
2201 "restoring original hot key mask\n");
2202 /* no short-circuit boolean operator below! */
2203 if ((hotkey_mask_set(hotkey_orig_mask) |
2204 hotkey_status_set(hotkey_orig_status)) != 0)
2205 printk(TPACPI_ERR
2206 "failed to restore hot key mask "
2207 "to BIOS defaults\n");
2208 }
2209 }
2210
2211 static int __init hotkey_init(struct ibm_init_struct *iibm)
2212 {
2213 /* Requirements for changing the default keymaps:
2214 *
2215 * 1. Many of the keys are mapped to KEY_RESERVED for very
2216 * good reasons. Do not change them unless you have deep
2217 * knowledge on the IBM and Lenovo ThinkPad firmware for
2218 * the various ThinkPad models. The driver behaves
2219 * differently for KEY_RESERVED: such keys have their
2220 * hot key mask *unset* in mask_recommended, and also
2221 * in the initial hot key mask programmed into the
2222 * firmware at driver load time, which means the firm-
2223 * ware may react very differently if you change them to
2224 * something else;
2225 *
2226 * 2. You must be subscribed to the linux-thinkpad and
2227 * ibm-acpi-devel mailing lists, and you should read the
2228 * list archives since 2007 if you want to change the
2229 * keymaps. This requirement exists so that you will
2230 * know the past history of problems with the thinkpad-
2231 * acpi driver keymaps, and also that you will be
2232 * listening to any bug reports;
2233 *
2234 * 3. Do not send thinkpad-acpi specific patches directly to
2235 * for merging, *ever*. Send them to the linux-acpi
2236 * mailinglist for comments. Merging is to be done only
2237 * through acpi-test and the ACPI maintainer.
2238 *
2239 * If the above is too much to ask, don't change the keymap.
2240 * Ask the thinkpad-acpi maintainer to do it, instead.
2241 */
2242 static u16 ibm_keycode_map[] __initdata = {
2243 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
2244 KEY_FN_F1, KEY_FN_F2, KEY_COFFEE, KEY_SLEEP,
2245 KEY_WLAN, KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
2246 KEY_FN_F9, KEY_FN_F10, KEY_FN_F11, KEY_SUSPEND,
2247
2248 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
2249 KEY_UNKNOWN, /* 0x0C: FN+BACKSPACE */
2250 KEY_UNKNOWN, /* 0x0D: FN+INSERT */
2251 KEY_UNKNOWN, /* 0x0E: FN+DELETE */
2252
2253 /* brightness: firmware always reacts to them, unless
2254 * X.org did some tricks in the radeon BIOS scratch
2255 * registers of *some* models */
2256 KEY_RESERVED, /* 0x0F: FN+HOME (brightness up) */
2257 KEY_RESERVED, /* 0x10: FN+END (brightness down) */
2258
2259 /* Thinklight: firmware always react to it */
2260 KEY_RESERVED, /* 0x11: FN+PGUP (thinklight toggle) */
2261
2262 KEY_UNKNOWN, /* 0x12: FN+PGDOWN */
2263 KEY_ZOOM, /* 0x13: FN+SPACE (zoom) */
2264
2265 /* Volume: firmware always react to it and reprograms
2266 * the built-in *extra* mixer. Never map it to control
2267 * another mixer by default. */
2268 KEY_RESERVED, /* 0x14: VOLUME UP */
2269 KEY_RESERVED, /* 0x15: VOLUME DOWN */
2270 KEY_RESERVED, /* 0x16: MUTE */
2271
2272 KEY_VENDOR, /* 0x17: Thinkpad/AccessIBM/Lenovo */
2273
2274 /* (assignments unknown, please report if found) */
2275 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
2276 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
2277 };
2278 static u16 lenovo_keycode_map[] __initdata = {
2279 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
2280 KEY_FN_F1, KEY_COFFEE, KEY_BATTERY, KEY_SLEEP,
2281 KEY_WLAN, KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
2282 KEY_FN_F9, KEY_FN_F10, KEY_FN_F11, KEY_SUSPEND,
2283
2284 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
2285 KEY_UNKNOWN, /* 0x0C: FN+BACKSPACE */
2286 KEY_UNKNOWN, /* 0x0D: FN+INSERT */
2287 KEY_UNKNOWN, /* 0x0E: FN+DELETE */
2288
2289 /* These either have to go through ACPI video, or
2290 * act like in the IBM ThinkPads, so don't ever
2291 * enable them by default */
2292 KEY_RESERVED, /* 0x0F: FN+HOME (brightness up) */
2293 KEY_RESERVED, /* 0x10: FN+END (brightness down) */
2294
2295 KEY_RESERVED, /* 0x11: FN+PGUP (thinklight toggle) */
2296
2297 KEY_UNKNOWN, /* 0x12: FN+PGDOWN */
2298 KEY_ZOOM, /* 0x13: FN+SPACE (zoom) */
2299
2300 /* Volume: z60/z61, T60 (BIOS version?): firmware always
2301 * react to it and reprograms the built-in *extra* mixer.
2302 * Never map it to control another mixer by default.
2303 *
2304 * T60?, T61, R60?, R61: firmware and EC tries to send
2305 * these over the regular keyboard, so these are no-ops,
2306 * but there are still weird bugs re. MUTE, so do not
2307 * change unless you get test reports from all Lenovo
2308 * models. May cause the BIOS to interfere with the
2309 * HDA mixer.
2310 */
2311 KEY_RESERVED, /* 0x14: VOLUME UP */
2312 KEY_RESERVED, /* 0x15: VOLUME DOWN */
2313 KEY_RESERVED, /* 0x16: MUTE */
2314
2315 KEY_VENDOR, /* 0x17: Thinkpad/AccessIBM/Lenovo */
2316
2317 /* (assignments unknown, please report if found) */
2318 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
2319 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
2320 };
2321
2322 #define TPACPI_HOTKEY_MAP_LEN ARRAY_SIZE(ibm_keycode_map)
2323 #define TPACPI_HOTKEY_MAP_SIZE sizeof(ibm_keycode_map)
2324 #define TPACPI_HOTKEY_MAP_TYPESIZE sizeof(ibm_keycode_map[0])
2325
2326 int res, i;
2327 int status;
2328 int hkeyv;
2329
2330 vdbg_printk(TPACPI_DBG_INIT, "initializing hotkey subdriver\n");
2331
2332 BUG_ON(!tpacpi_inputdev);
2333 BUG_ON(tpacpi_inputdev->open != NULL ||
2334 tpacpi_inputdev->close != NULL);
2335
2336 TPACPI_ACPIHANDLE_INIT(hkey);
2337 mutex_init(&hotkey_mutex);
2338
2339 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2340 mutex_init(&hotkey_thread_mutex);
2341 mutex_init(&hotkey_thread_data_mutex);
2342 #endif
2343
2344 /* hotkey not supported on 570 */
2345 tp_features.hotkey = hkey_handle != NULL;
2346
2347 vdbg_printk(TPACPI_DBG_INIT, "hotkeys are %s\n",
2348 str_supported(tp_features.hotkey));
2349
2350 if (!tp_features.hotkey)
2351 return 1;
2352
2353 tpacpi_disable_brightness_delay();
2354
2355 hotkey_dev_attributes = create_attr_set(13, NULL);
2356 if (!hotkey_dev_attributes)
2357 return -ENOMEM;
2358 res = add_many_to_attr_set(hotkey_dev_attributes,
2359 hotkey_attributes,
2360 ARRAY_SIZE(hotkey_attributes));
2361 if (res)
2362 goto err_exit;
2363
2364 /* mask not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
2365 A30, R30, R31, T20-22, X20-21, X22-24. Detected by checking
2366 for HKEY interface version 0x100 */
2367 if (acpi_evalf(hkey_handle, &hkeyv, "MHKV", "qd")) {
2368 if ((hkeyv >> 8) != 1) {
2369 printk(TPACPI_ERR "unknown version of the "
2370 "HKEY interface: 0x%x\n", hkeyv);
2371 printk(TPACPI_ERR "please report this to %s\n",
2372 TPACPI_MAIL);
2373 } else {
2374 /*
2375 * MHKV 0x100 in A31, R40, R40e,
2376 * T4x, X31, and later
2377 */
2378 tp_features.hotkey_mask = 1;
2379 }
2380 }
2381
2382 vdbg_printk(TPACPI_DBG_INIT, "hotkey masks are %s\n",
2383 str_supported(tp_features.hotkey_mask));
2384
2385 if (tp_features.hotkey_mask) {
2386 if (!acpi_evalf(hkey_handle, &hotkey_all_mask,
2387 "MHKA", "qd")) {
2388 printk(TPACPI_ERR
2389 "missing MHKA handler, "
2390 "please report this to %s\n",
2391 TPACPI_MAIL);
2392 /* FN+F12, FN+F4, FN+F3 */
2393 hotkey_all_mask = 0x080cU;
2394 }
2395 }
2396
2397 /* hotkey_source_mask *must* be zero for
2398 * the first hotkey_mask_get */
2399 res = hotkey_status_get(&hotkey_orig_status);
2400 if (res)
2401 goto err_exit;
2402
2403 if (tp_features.hotkey_mask) {
2404 res = hotkey_mask_get();
2405 if (res)
2406 goto err_exit;
2407
2408 hotkey_orig_mask = hotkey_mask;
2409 res = add_many_to_attr_set(
2410 hotkey_dev_attributes,
2411 hotkey_mask_attributes,
2412 ARRAY_SIZE(hotkey_mask_attributes));
2413 if (res)
2414 goto err_exit;
2415 }
2416
2417 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2418 if (tp_features.hotkey_mask) {
2419 hotkey_source_mask = TPACPI_HKEY_NVRAM_GOOD_MASK
2420 & ~hotkey_all_mask;
2421 } else {
2422 hotkey_source_mask = TPACPI_HKEY_NVRAM_GOOD_MASK;
2423 }
2424
2425 vdbg_printk(TPACPI_DBG_INIT,
2426 "hotkey source mask 0x%08x, polling freq %d\n",
2427 hotkey_source_mask, hotkey_poll_freq);
2428 #endif
2429
2430 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
2431 if (dbg_wlswemul) {
2432 tp_features.hotkey_wlsw = 1;
2433 printk(TPACPI_INFO
2434 "radio switch emulation enabled\n");
2435 } else
2436 #endif
2437 /* Not all thinkpads have a hardware radio switch */
2438 if (acpi_evalf(hkey_handle, &status, "WLSW", "qd")) {
2439 tp_features.hotkey_wlsw = 1;
2440 printk(TPACPI_INFO
2441 "radio switch found; radios are %s\n",
2442 enabled(status, 0));
2443 }
2444 if (tp_features.hotkey_wlsw)
2445 res = add_to_attr_set(hotkey_dev_attributes,
2446 &dev_attr_hotkey_radio_sw.attr);
2447
2448 /* For X41t, X60t, X61t Tablets... */
2449 if (!res && acpi_evalf(hkey_handle, &status, "MHKG", "qd")) {
2450 tp_features.hotkey_tablet = 1;
2451 printk(TPACPI_INFO
2452 "possible tablet mode switch found; "
2453 "ThinkPad in %s mode\n",
2454 (status & TP_HOTKEY_TABLET_MASK)?
2455 "tablet" : "laptop");
2456 res = add_to_attr_set(hotkey_dev_attributes,
2457 &dev_attr_hotkey_tablet_mode.attr);
2458 }
2459
2460 if (!res)
2461 res = register_attr_set_with_sysfs(
2462 hotkey_dev_attributes,
2463 &tpacpi_pdev->dev.kobj);
2464 if (res)
2465 goto err_exit;
2466
2467 /* Set up key map */
2468
2469 hotkey_keycode_map = kmalloc(TPACPI_HOTKEY_MAP_SIZE,
2470 GFP_KERNEL);
2471 if (!hotkey_keycode_map) {
2472 printk(TPACPI_ERR
2473 "failed to allocate memory for key map\n");
2474 res = -ENOMEM;
2475 goto err_exit;
2476 }
2477
2478 if (thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO) {
2479 dbg_printk(TPACPI_DBG_INIT,
2480 "using Lenovo default hot key map\n");
2481 memcpy(hotkey_keycode_map, &lenovo_keycode_map,
2482 TPACPI_HOTKEY_MAP_SIZE);
2483 } else {
2484 dbg_printk(TPACPI_DBG_INIT,
2485 "using IBM default hot key map\n");
2486 memcpy(hotkey_keycode_map, &ibm_keycode_map,
2487 TPACPI_HOTKEY_MAP_SIZE);
2488 }
2489
2490 set_bit(EV_KEY, tpacpi_inputdev->evbit);
2491 set_bit(EV_MSC, tpacpi_inputdev->evbit);
2492 set_bit(MSC_SCAN, tpacpi_inputdev->mscbit);
2493 tpacpi_inputdev->keycodesize = TPACPI_HOTKEY_MAP_TYPESIZE;
2494 tpacpi_inputdev->keycodemax = TPACPI_HOTKEY_MAP_LEN;
2495 tpacpi_inputdev->keycode = hotkey_keycode_map;
2496 for (i = 0; i < TPACPI_HOTKEY_MAP_LEN; i++) {
2497 if (hotkey_keycode_map[i] != KEY_RESERVED) {
2498 set_bit(hotkey_keycode_map[i],
2499 tpacpi_inputdev->keybit);
2500 } else {
2501 if (i < sizeof(hotkey_reserved_mask)*8)
2502 hotkey_reserved_mask |= 1 << i;
2503 }
2504 }
2505
2506 if (tp_features.hotkey_wlsw) {
2507 set_bit(EV_SW, tpacpi_inputdev->evbit);
2508 set_bit(SW_RFKILL_ALL, tpacpi_inputdev->swbit);
2509 }
2510 if (tp_features.hotkey_tablet) {
2511 set_bit(EV_SW, tpacpi_inputdev->evbit);
2512 set_bit(SW_TABLET_MODE, tpacpi_inputdev->swbit);
2513 }
2514
2515 /* Do not issue duplicate brightness change events to
2516 * userspace */
2517 if (!tp_features.bright_acpimode)
2518 /* update bright_acpimode... */
2519 tpacpi_check_std_acpi_brightness_support();
2520
2521 if (tp_features.bright_acpimode) {
2522 printk(TPACPI_INFO
2523 "This ThinkPad has standard ACPI backlight "
2524 "brightness control, supported by the ACPI "
2525 "video driver\n");
2526 printk(TPACPI_NOTICE
2527 "Disabling thinkpad-acpi brightness events "
2528 "by default...\n");
2529
2530 /* The hotkey_reserved_mask change below is not
2531 * necessary while the keys are at KEY_RESERVED in the
2532 * default map, but better safe than sorry, leave it
2533 * here as a marker of what we have to do, especially
2534 * when we finally become able to set this at runtime
2535 * on response to X.org requests */
2536 hotkey_reserved_mask |=
2537 (1 << TP_ACPI_HOTKEYSCAN_FNHOME)
2538 | (1 << TP_ACPI_HOTKEYSCAN_FNEND);
2539 }
2540
2541 dbg_printk(TPACPI_DBG_INIT, "enabling hot key handling\n");
2542 res = hotkey_status_set(1);
2543 if (res) {
2544 hotkey_exit();
2545 return res;
2546 }
2547 res = hotkey_mask_set(((hotkey_all_mask | hotkey_source_mask)
2548 & ~hotkey_reserved_mask)
2549 | hotkey_orig_mask);
2550 if (res < 0 && res != -ENXIO) {
2551 hotkey_exit();
2552 return res;
2553 }
2554
2555 dbg_printk(TPACPI_DBG_INIT,
2556 "legacy hot key reporting over procfs %s\n",
2557 (hotkey_report_mode < 2) ?
2558 "enabled" : "disabled");
2559
2560 tpacpi_inputdev->open = &hotkey_inputdev_open;
2561 tpacpi_inputdev->close = &hotkey_inputdev_close;
2562
2563 hotkey_poll_setup_safe(1);
2564 tpacpi_send_radiosw_update();
2565 tpacpi_input_send_tabletsw();
2566
2567 return 0;
2568
2569 err_exit:
2570 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
2571 hotkey_dev_attributes = NULL;
2572
2573 return (res < 0)? res : 1;
2574 }
2575
2576 static bool hotkey_notify_hotkey(const u32 hkey,
2577 bool *send_acpi_ev,
2578 bool *ignore_acpi_ev)
2579 {
2580 /* 0x1000-0x1FFF: key presses */
2581 unsigned int scancode = hkey & 0xfff;
2582 *send_acpi_ev = true;
2583 *ignore_acpi_ev = false;
2584
2585 if (scancode > 0 && scancode < 0x21) {
2586 scancode--;
2587 if (!(hotkey_source_mask & (1 << scancode))) {
2588 tpacpi_input_send_key(scancode);
2589 *send_acpi_ev = false;
2590 } else {
2591 *ignore_acpi_ev = true;
2592 }
2593 return true;
2594 }
2595 return false;
2596 }
2597
2598 static bool hotkey_notify_wakeup(const u32 hkey,
2599 bool *send_acpi_ev,
2600 bool *ignore_acpi_ev)
2601 {
2602 /* 0x2000-0x2FFF: Wakeup reason */
2603 *send_acpi_ev = true;
2604 *ignore_acpi_ev = false;
2605
2606 switch (hkey) {
2607 case 0x2304: /* suspend, undock */
2608 case 0x2404: /* hibernation, undock */
2609 hotkey_wakeup_reason = TP_ACPI_WAKEUP_UNDOCK;
2610 *ignore_acpi_ev = true;
2611 break;
2612
2613 case 0x2305: /* suspend, bay eject */
2614 case 0x2405: /* hibernation, bay eject */
2615 hotkey_wakeup_reason = TP_ACPI_WAKEUP_BAYEJ;
2616 *ignore_acpi_ev = true;
2617 break;
2618
2619 case 0x2313: /* Battery on critical low level (S3) */
2620 case 0x2413: /* Battery on critical low level (S4) */
2621 printk(TPACPI_ALERT
2622 "EMERGENCY WAKEUP: battery almost empty\n");
2623 /* how to auto-heal: */
2624 /* 2313: woke up from S3, go to S4/S5 */
2625 /* 2413: woke up from S4, go to S5 */
2626 break;
2627
2628 default:
2629 return false;
2630 }
2631
2632 if (hotkey_wakeup_reason != TP_ACPI_WAKEUP_NONE) {
2633 printk(TPACPI_INFO
2634 "woke up due to a hot-unplug "
2635 "request...\n");
2636 hotkey_wakeup_reason_notify_change();
2637 }
2638 return true;
2639 }
2640
2641 static bool hotkey_notify_usrevent(const u32 hkey,
2642 bool *send_acpi_ev,
2643 bool *ignore_acpi_ev)
2644 {
2645 /* 0x5000-0x5FFF: human interface helpers */
2646 *send_acpi_ev = true;
2647 *ignore_acpi_ev = false;
2648
2649 switch (hkey) {
2650 case 0x5010: /* Lenovo new BIOS: brightness changed */
2651 case 0x500b: /* X61t: tablet pen inserted into bay */
2652 case 0x500c: /* X61t: tablet pen removed from bay */
2653 return true;
2654
2655 case 0x5009: /* X41t-X61t: swivel up (tablet mode) */
2656 case 0x500a: /* X41t-X61t: swivel down (normal mode) */
2657 tpacpi_input_send_tabletsw();
2658 hotkey_tablet_mode_notify_change();
2659 *send_acpi_ev = false;
2660 return true;
2661
2662 case 0x5001:
2663 case 0x5002:
2664 /* LID switch events. Do not propagate */
2665 *ignore_acpi_ev = true;
2666 return true;
2667
2668 default:
2669 return false;
2670 }
2671 }
2672
2673 static bool hotkey_notify_thermal(const u32 hkey,
2674 bool *send_acpi_ev,
2675 bool *ignore_acpi_ev)
2676 {
2677 /* 0x6000-0x6FFF: thermal alarms */
2678 *send_acpi_ev = true;
2679 *ignore_acpi_ev = false;
2680
2681 switch (hkey) {
2682 case 0x6011:
2683 printk(TPACPI_CRIT
2684 "THERMAL ALARM: battery is too hot!\n");
2685 /* recommended action: warn user through gui */
2686 return true;
2687 case 0x6012:
2688 printk(TPACPI_ALERT
2689 "THERMAL EMERGENCY: battery is extremely hot!\n");
2690 /* recommended action: immediate sleep/hibernate */
2691 return true;
2692 case 0x6021:
2693 printk(TPACPI_CRIT
2694 "THERMAL ALARM: "
2695 "a sensor reports something is too hot!\n");
2696 /* recommended action: warn user through gui, that */
2697 /* some internal component is too hot */
2698 return true;
2699 case 0x6022:
2700 printk(TPACPI_ALERT
2701 "THERMAL EMERGENCY: "
2702 "a sensor reports something is extremely hot!\n");
2703 /* recommended action: immediate sleep/hibernate */
2704 return true;
2705 default:
2706 printk(TPACPI_ALERT
2707 "THERMAL ALERT: unknown thermal alarm received\n");
2708 return false;
2709 }
2710 }
2711
2712 static void hotkey_notify(struct ibm_struct *ibm, u32 event)
2713 {
2714 u32 hkey;
2715 bool send_acpi_ev;
2716 bool ignore_acpi_ev;
2717 bool known_ev;
2718
2719 if (event != 0x80) {
2720 printk(TPACPI_ERR
2721 "unknown HKEY notification event %d\n", event);
2722 /* forward it to userspace, maybe it knows how to handle it */
2723 acpi_bus_generate_netlink_event(
2724 ibm->acpi->device->pnp.device_class,
2725 dev_name(&ibm->acpi->device->dev),
2726 event, 0);
2727 return;
2728 }
2729
2730 while (1) {
2731 if (!acpi_evalf(hkey_handle, &hkey, "MHKP", "d")) {
2732 printk(TPACPI_ERR "failed to retrieve HKEY event\n");
2733 return;
2734 }
2735
2736 if (hkey == 0) {
2737 /* queue empty */
2738 return;
2739 }
2740
2741 send_acpi_ev = true;
2742 ignore_acpi_ev = false;
2743
2744 switch (hkey >> 12) {
2745 case 1:
2746 /* 0x1000-0x1FFF: key presses */
2747 known_ev = hotkey_notify_hotkey(hkey, &send_acpi_ev,
2748 &ignore_acpi_ev);
2749 break;
2750 case 2:
2751 /* 0x2000-0x2FFF: Wakeup reason */
2752 known_ev = hotkey_notify_wakeup(hkey, &send_acpi_ev,
2753 &ignore_acpi_ev);
2754 break;
2755 case 3:
2756 /* 0x3000-0x3FFF: bay-related wakeups */
2757 if (hkey == 0x3003) {
2758 hotkey_autosleep_ack = 1;
2759 printk(TPACPI_INFO
2760 "bay ejected\n");
2761 hotkey_wakeup_hotunplug_complete_notify_change();
2762 known_ev = true;
2763 } else {
2764 known_ev = false;
2765 }
2766 break;
2767 case 4:
2768 /* 0x4000-0x4FFF: dock-related wakeups */
2769 if (hkey == 0x4003) {
2770 hotkey_autosleep_ack = 1;
2771 printk(TPACPI_INFO
2772 "undocked\n");
2773 hotkey_wakeup_hotunplug_complete_notify_change();
2774 known_ev = true;
2775 } else {
2776 known_ev = false;
2777 }
2778 break;
2779 case 5:
2780 /* 0x5000-0x5FFF: human interface helpers */
2781 known_ev = hotkey_notify_usrevent(hkey, &send_acpi_ev,
2782 &ignore_acpi_ev);
2783 break;
2784 case 6:
2785 /* 0x6000-0x6FFF: thermal alarms */
2786 known_ev = hotkey_notify_thermal(hkey, &send_acpi_ev,
2787 &ignore_acpi_ev);
2788 break;
2789 case 7:
2790 /* 0x7000-0x7FFF: misc */
2791 if (tp_features.hotkey_wlsw && hkey == 0x7000) {
2792 tpacpi_send_radiosw_update();
2793 send_acpi_ev = 0;
2794 known_ev = true;
2795 break;
2796 }
2797 /* fallthrough to default */
2798 default:
2799 known_ev = false;
2800 }
2801 if (!known_ev) {
2802 printk(TPACPI_NOTICE
2803 "unhandled HKEY event 0x%04x\n", hkey);
2804 printk(TPACPI_NOTICE
2805 "please report the conditions when this "
2806 "event happened to %s\n", TPACPI_MAIL);
2807 }
2808
2809 /* Legacy events */
2810 if (!ignore_acpi_ev &&
2811 (send_acpi_ev || hotkey_report_mode < 2)) {
2812 acpi_bus_generate_proc_event(ibm->acpi->device,
2813 event, hkey);
2814 }
2815
2816 /* netlink events */
2817 if (!ignore_acpi_ev && send_acpi_ev) {
2818 acpi_bus_generate_netlink_event(
2819 ibm->acpi->device->pnp.device_class,
2820 dev_name(&ibm->acpi->device->dev),
2821 event, hkey);
2822 }
2823 }
2824 }
2825
2826 static void hotkey_suspend(pm_message_t state)
2827 {
2828 /* Do these on suspend, we get the events on early resume! */
2829 hotkey_wakeup_reason = TP_ACPI_WAKEUP_NONE;
2830 hotkey_autosleep_ack = 0;
2831 }
2832
2833 static void hotkey_resume(void)
2834 {
2835 tpacpi_disable_brightness_delay();
2836
2837 if (hotkey_mask_get())
2838 printk(TPACPI_ERR
2839 "error while trying to read hot key mask "
2840 "from firmware\n");
2841 tpacpi_send_radiosw_update();
2842 hotkey_tablet_mode_notify_change();
2843 hotkey_wakeup_reason_notify_change();
2844 hotkey_wakeup_hotunplug_complete_notify_change();
2845 hotkey_poll_setup_safe(0);
2846 }
2847
2848 /* procfs -------------------------------------------------------------- */
2849 static int hotkey_read(char *p)
2850 {
2851 int res, status;
2852 int len = 0;
2853
2854 if (!tp_features.hotkey) {
2855 len += sprintf(p + len, "status:\t\tnot supported\n");
2856 return len;
2857 }
2858
2859 if (mutex_lock_killable(&hotkey_mutex))
2860 return -ERESTARTSYS;
2861 res = hotkey_status_get(&status);
2862 if (!res)
2863 res = hotkey_mask_get();
2864 mutex_unlock(&hotkey_mutex);
2865 if (res)
2866 return res;
2867
2868 len += sprintf(p + len, "status:\t\t%s\n", enabled(status, 0));
2869 if (tp_features.hotkey_mask) {
2870 len += sprintf(p + len, "mask:\t\t0x%08x\n", hotkey_mask);
2871 len += sprintf(p + len,
2872 "commands:\tenable, disable, reset, <mask>\n");
2873 } else {
2874 len += sprintf(p + len, "mask:\t\tnot supported\n");
2875 len += sprintf(p + len, "commands:\tenable, disable, reset\n");
2876 }
2877
2878 return len;
2879 }
2880
2881 static int hotkey_write(char *buf)
2882 {
2883 int res, status;
2884 u32 mask;
2885 char *cmd;
2886
2887 if (!tp_features.hotkey)
2888 return -ENODEV;
2889
2890 if (mutex_lock_killable(&hotkey_mutex))
2891 return -ERESTARTSYS;
2892
2893 status = -1;
2894 mask = hotkey_mask;
2895
2896 res = 0;
2897 while ((cmd = next_cmd(&buf))) {
2898 if (strlencmp(cmd, "enable") == 0) {
2899 status = 1;
2900 } else if (strlencmp(cmd, "disable") == 0) {
2901 status = 0;
2902 } else if (strlencmp(cmd, "reset") == 0) {
2903 status = hotkey_orig_status;
2904 mask = hotkey_orig_mask;
2905 } else if (sscanf(cmd, "0x%x", &mask) == 1) {
2906 /* mask set */
2907 } else if (sscanf(cmd, "%x", &mask) == 1) {
2908 /* mask set */
2909 } else {
2910 res = -EINVAL;
2911 goto errexit;
2912 }
2913 }
2914 if (status != -1)
2915 res = hotkey_status_set(status);
2916
2917 if (!res && mask != hotkey_mask)
2918 res = hotkey_mask_set(mask);
2919
2920 errexit:
2921 mutex_unlock(&hotkey_mutex);
2922 return res;
2923 }
2924
2925 static const struct acpi_device_id ibm_htk_device_ids[] = {
2926 {TPACPI_ACPI_HKEY_HID, 0},
2927 {"", 0},
2928 };
2929
2930 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver = {
2931 .hid = ibm_htk_device_ids,
2932 .notify = hotkey_notify,
2933 .handle = &hkey_handle,
2934 .type = ACPI_DEVICE_NOTIFY,
2935 };
2936
2937 static struct ibm_struct hotkey_driver_data = {
2938 .name = "hotkey",
2939 .read = hotkey_read,
2940 .write = hotkey_write,
2941 .exit = hotkey_exit,
2942 .resume = hotkey_resume,
2943 .suspend = hotkey_suspend,
2944 .acpi = &ibm_hotkey_acpidriver,
2945 };
2946
2947 /*************************************************************************
2948 * Bluetooth subdriver
2949 */
2950
2951 enum {
2952 /* ACPI GBDC/SBDC bits */
2953 TP_ACPI_BLUETOOTH_HWPRESENT = 0x01, /* Bluetooth hw available */
2954 TP_ACPI_BLUETOOTH_RADIOSSW = 0x02, /* Bluetooth radio enabled */
2955 TP_ACPI_BLUETOOTH_RESUMECTRL = 0x04, /* Bluetooth state at resume:
2956 off / last state */
2957 };
2958
2959 enum {
2960 /* ACPI \BLTH commands */
2961 TP_ACPI_BLTH_GET_ULTRAPORT_ID = 0x00, /* Get Ultraport BT ID */
2962 TP_ACPI_BLTH_GET_PWR_ON_RESUME = 0x01, /* Get power-on-resume state */
2963 TP_ACPI_BLTH_PWR_ON_ON_RESUME = 0x02, /* Resume powered on */
2964 TP_ACPI_BLTH_PWR_OFF_ON_RESUME = 0x03, /* Resume powered off */
2965 TP_ACPI_BLTH_SAVE_STATE = 0x05, /* Save state for S4/S5 */
2966 };
2967
2968 static struct rfkill *tpacpi_bluetooth_rfkill;
2969
2970 static void bluetooth_suspend(pm_message_t state)
2971 {
2972 /* Try to make sure radio will resume powered off */
2973 acpi_evalf(NULL, NULL, "\\BLTH", "vd",
2974 TP_ACPI_BLTH_PWR_OFF_ON_RESUME);
2975 }
2976
2977 static int bluetooth_get_radiosw(void)
2978 {
2979 int status;
2980
2981 if (!tp_features.bluetooth)
2982 return -ENODEV;
2983
2984 /* WLSW overrides bluetooth in firmware/hardware, reflect that */
2985 if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&status) && !status)
2986 return RFKILL_STATE_HARD_BLOCKED;
2987
2988 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
2989 if (dbg_bluetoothemul)
2990 return (tpacpi_bluetooth_emulstate) ?
2991 RFKILL_STATE_UNBLOCKED : RFKILL_STATE_SOFT_BLOCKED;
2992 #endif
2993
2994 if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
2995 return -EIO;
2996
2997 return ((status & TP_ACPI_BLUETOOTH_RADIOSSW) != 0) ?
2998 RFKILL_STATE_UNBLOCKED : RFKILL_STATE_SOFT_BLOCKED;
2999 }
3000
3001 static void bluetooth_update_rfk(void)
3002 {
3003 int status;
3004
3005 if (!tpacpi_bluetooth_rfkill)
3006 return;
3007
3008 status = bluetooth_get_radiosw();
3009 if (status < 0)
3010 return;
3011 rfkill_force_state(tpacpi_bluetooth_rfkill, status);
3012 }
3013
3014 static int bluetooth_set_radiosw(int radio_on, int update_rfk)
3015 {
3016 int status;
3017
3018 if (!tp_features.bluetooth)
3019 return -ENODEV;
3020
3021 /* WLSW overrides bluetooth in firmware/hardware, but there is no
3022 * reason to risk weird behaviour. */
3023 if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&status) && !status
3024 && radio_on)
3025 return -EPERM;
3026
3027 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3028 if (dbg_bluetoothemul) {
3029 tpacpi_bluetooth_emulstate = !!radio_on;
3030 if (update_rfk)
3031 bluetooth_update_rfk();
3032 return 0;
3033 }
3034 #endif
3035
3036 /* We make sure to keep TP_ACPI_BLUETOOTH_RESUMECTRL off */
3037 if (radio_on)
3038 status = TP_ACPI_BLUETOOTH_RADIOSSW;
3039 else
3040 status = 0;
3041 if (!acpi_evalf(hkey_handle, NULL, "SBDC", "vd", status))
3042 return -EIO;
3043
3044 if (update_rfk)
3045 bluetooth_update_rfk();
3046
3047 return 0;
3048 }
3049
3050 /* sysfs bluetooth enable ---------------------------------------------- */
3051 static ssize_t bluetooth_enable_show(struct device *dev,
3052 struct device_attribute *attr,
3053 char *buf)
3054 {
3055 int status;
3056
3057 status = bluetooth_get_radiosw();
3058 if (status < 0)
3059 return status;
3060
3061 return snprintf(buf, PAGE_SIZE, "%d\n",
3062 (status == RFKILL_STATE_UNBLOCKED) ? 1 : 0);
3063 }
3064
3065 static ssize_t bluetooth_enable_store(struct device *dev,
3066 struct device_attribute *attr,
3067 const char *buf, size_t count)
3068 {
3069 unsigned long t;
3070 int res;
3071
3072 if (parse_strtoul(buf, 1, &t))
3073 return -EINVAL;
3074
3075 res = bluetooth_set_radiosw(t, 1);
3076
3077 return (res) ? res : count;
3078 }
3079
3080 static struct device_attribute dev_attr_bluetooth_enable =
3081 __ATTR(bluetooth_enable, S_IWUSR | S_IRUGO,
3082 bluetooth_enable_show, bluetooth_enable_store);
3083
3084 /* --------------------------------------------------------------------- */
3085
3086 static struct attribute *bluetooth_attributes[] = {
3087 &dev_attr_bluetooth_enable.attr,
3088 NULL
3089 };
3090
3091 static const struct attribute_group bluetooth_attr_group = {
3092 .attrs = bluetooth_attributes,
3093 };
3094
3095 static int tpacpi_bluetooth_rfk_get(void *data, enum rfkill_state *state)
3096 {
3097 int bts = bluetooth_get_radiosw();
3098
3099 if (bts < 0)
3100 return bts;
3101
3102 *state = bts;
3103 return 0;
3104 }
3105
3106 static int tpacpi_bluetooth_rfk_set(void *data, enum rfkill_state state)
3107 {
3108 return bluetooth_set_radiosw((state == RFKILL_STATE_UNBLOCKED), 0);
3109 }
3110
3111 static void bluetooth_shutdown(void)
3112 {
3113 /* Order firmware to save current state to NVRAM */
3114 if (!acpi_evalf(NULL, NULL, "\\BLTH", "vd",
3115 TP_ACPI_BLTH_SAVE_STATE))
3116 printk(TPACPI_NOTICE
3117 "failed to save bluetooth state to NVRAM\n");
3118 }
3119
3120 static void bluetooth_exit(void)
3121 {
3122 bluetooth_shutdown();
3123
3124 if (tpacpi_bluetooth_rfkill)
3125 rfkill_unregister(tpacpi_bluetooth_rfkill);
3126
3127 sysfs_remove_group(&tpacpi_pdev->dev.kobj,
3128 &bluetooth_attr_group);
3129 }
3130
3131 static int __init bluetooth_init(struct ibm_init_struct *iibm)
3132 {
3133 int res;
3134 int status = 0;
3135
3136 vdbg_printk(TPACPI_DBG_INIT, "initializing bluetooth subdriver\n");
3137
3138 TPACPI_ACPIHANDLE_INIT(hkey);
3139
3140 /* bluetooth not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
3141 G4x, R30, R31, R40e, R50e, T20-22, X20-21 */
3142 tp_features.bluetooth = hkey_handle &&
3143 acpi_evalf(hkey_handle, &status, "GBDC", "qd");
3144
3145 vdbg_printk(TPACPI_DBG_INIT, "bluetooth is %s, status 0x%02x\n",
3146 str_supported(tp_features.bluetooth),
3147 status);
3148
3149 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3150 if (dbg_bluetoothemul) {
3151 tp_features.bluetooth = 1;
3152 printk(TPACPI_INFO
3153 "bluetooth switch emulation enabled\n");
3154 } else
3155 #endif
3156 if (tp_features.bluetooth &&
3157 !(status & TP_ACPI_BLUETOOTH_HWPRESENT)) {
3158 /* no bluetooth hardware present in system */
3159 tp_features.bluetooth = 0;
3160 dbg_printk(TPACPI_DBG_INIT,
3161 "bluetooth hardware not installed\n");
3162 }
3163
3164 if (!tp_features.bluetooth)
3165 return 1;
3166
3167 res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
3168 &bluetooth_attr_group);
3169 if (res)
3170 return res;
3171
3172 res = tpacpi_new_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID,
3173 &tpacpi_bluetooth_rfkill,
3174 RFKILL_TYPE_BLUETOOTH,
3175 "tpacpi_bluetooth_sw",
3176 true,
3177 tpacpi_bluetooth_rfk_set,
3178 tpacpi_bluetooth_rfk_get);
3179 if (res) {
3180 bluetooth_exit();
3181 return res;
3182 }
3183
3184 return 0;
3185 }
3186
3187 /* procfs -------------------------------------------------------------- */
3188 static int bluetooth_read(char *p)
3189 {
3190 int len = 0;
3191 int status = bluetooth_get_radiosw();
3192
3193 if (!tp_features.bluetooth)
3194 len += sprintf(p + len, "status:\t\tnot supported\n");
3195 else {
3196 len += sprintf(p + len, "status:\t\t%s\n",
3197 (status == RFKILL_STATE_UNBLOCKED) ?
3198 "enabled" : "disabled");
3199 len += sprintf(p + len, "commands:\tenable, disable\n");
3200 }
3201
3202 return len;
3203 }
3204
3205 static int bluetooth_write(char *buf)
3206 {
3207 char *cmd;
3208
3209 if (!tp_features.bluetooth)
3210 return -ENODEV;
3211
3212 while ((cmd = next_cmd(&buf))) {
3213 if (strlencmp(cmd, "enable") == 0) {
3214 bluetooth_set_radiosw(1, 1);
3215 } else if (strlencmp(cmd, "disable") == 0) {
3216 bluetooth_set_radiosw(0, 1);
3217 } else
3218 return -EINVAL;
3219 }
3220
3221 return 0;
3222 }
3223
3224 static struct ibm_struct bluetooth_driver_data = {
3225 .name = "bluetooth",
3226 .read = bluetooth_read,
3227 .write = bluetooth_write,
3228 .exit = bluetooth_exit,
3229 .suspend = bluetooth_suspend,
3230 .shutdown = bluetooth_shutdown,
3231 };
3232
3233 /*************************************************************************
3234 * Wan subdriver
3235 */
3236
3237 enum {
3238 /* ACPI GWAN/SWAN bits */
3239 TP_ACPI_WANCARD_HWPRESENT = 0x01, /* Wan hw available */
3240 TP_ACPI_WANCARD_RADIOSSW = 0x02, /* Wan radio enabled */
3241 TP_ACPI_WANCARD_RESUMECTRL = 0x04, /* Wan state at resume:
3242 off / last state */
3243 };
3244
3245 static struct rfkill *tpacpi_wan_rfkill;
3246
3247 static void wan_suspend(pm_message_t state)
3248 {
3249 /* Try to make sure radio will resume powered off */
3250 acpi_evalf(NULL, NULL, "\\WGSV", "qvd",
3251 TP_ACPI_WGSV_PWR_OFF_ON_RESUME);
3252 }
3253
3254 static int wan_get_radiosw(void)
3255 {
3256 int status;
3257
3258 if (!tp_features.wan)
3259 return -ENODEV;
3260
3261 /* WLSW overrides WWAN in firmware/hardware, reflect that */
3262 if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&status) && !status)
3263 return RFKILL_STATE_HARD_BLOCKED;
3264
3265 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3266 if (dbg_wwanemul)
3267 return (tpacpi_wwan_emulstate) ?
3268 RFKILL_STATE_UNBLOCKED : RFKILL_STATE_SOFT_BLOCKED;
3269 #endif
3270
3271 if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
3272 return -EIO;
3273
3274 return ((status & TP_ACPI_WANCARD_RADIOSSW) != 0) ?
3275 RFKILL_STATE_UNBLOCKED : RFKILL_STATE_SOFT_BLOCKED;
3276 }
3277
3278 static void wan_update_rfk(void)
3279 {
3280 int status;
3281
3282 if (!tpacpi_wan_rfkill)
3283 return;
3284
3285 status = wan_get_radiosw();
3286 if (status < 0)
3287 return;
3288 rfkill_force_state(tpacpi_wan_rfkill, status);
3289 }
3290
3291 static int wan_set_radiosw(int radio_on, int update_rfk)
3292 {
3293 int status;
3294
3295 if (!tp_features.wan)
3296 return -ENODEV;
3297
3298 /* WLSW overrides bluetooth in firmware/hardware, but there is no
3299 * reason to risk weird behaviour. */
3300 if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&status) && !status
3301 && radio_on)
3302 return -EPERM;
3303
3304 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3305 if (dbg_wwanemul) {
3306 tpacpi_wwan_emulstate = !!radio_on;
3307 if (update_rfk)
3308 wan_update_rfk();
3309 return 0;
3310 }
3311 #endif
3312
3313 /* We make sure to keep TP_ACPI_WANCARD_RESUMECTRL off */
3314 if (radio_on)
3315 status = TP_ACPI_WANCARD_RADIOSSW;
3316 else
3317 status = 0;
3318 if (!acpi_evalf(hkey_handle, NULL, "SWAN", "vd", status))
3319 return -EIO;
3320
3321 if (update_rfk)
3322 wan_update_rfk();
3323
3324 return 0;
3325 }
3326
3327 /* sysfs wan enable ---------------------------------------------------- */
3328 static ssize_t wan_enable_show(struct device *dev,
3329 struct device_attribute *attr,
3330 char *buf)
3331 {
3332 int status;
3333
3334 status = wan_get_radiosw();
3335 if (status < 0)
3336 return status;
3337
3338 return snprintf(buf, PAGE_SIZE, "%d\n",
3339 (status == RFKILL_STATE_UNBLOCKED) ? 1 : 0);
3340 }
3341
3342 static ssize_t wan_enable_store(struct device *dev,
3343 struct device_attribute *attr,
3344 const char *buf, size_t count)
3345 {
3346 unsigned long t;
3347 int res;
3348
3349 if (parse_strtoul(buf, 1, &t))
3350 return -EINVAL;
3351
3352 res = wan_set_radiosw(t, 1);
3353
3354 return (res) ? res : count;
3355 }
3356
3357 static struct device_attribute dev_attr_wan_enable =
3358 __ATTR(wwan_enable, S_IWUSR | S_IRUGO,
3359 wan_enable_show, wan_enable_store);
3360
3361 /* --------------------------------------------------------------------- */
3362
3363 static struct attribute *wan_attributes[] = {
3364 &dev_attr_wan_enable.attr,
3365 NULL
3366 };
3367
3368 static const struct attribute_group wan_attr_group = {
3369 .attrs = wan_attributes,
3370 };
3371
3372 static int tpacpi_wan_rfk_get(void *data, enum rfkill_state *state)
3373 {
3374 int wans = wan_get_radiosw();
3375
3376 if (wans < 0)
3377 return wans;
3378
3379 *state = wans;
3380 return 0;
3381 }
3382
3383 static int tpacpi_wan_rfk_set(void *data, enum rfkill_state state)
3384 {
3385 return wan_set_radiosw((state == RFKILL_STATE_UNBLOCKED), 0);
3386 }
3387
3388 static void wan_shutdown(void)
3389 {
3390 /* Order firmware to save current state to NVRAM */
3391 if (!acpi_evalf(NULL, NULL, "\\WGSV", "vd",
3392 TP_ACPI_WGSV_SAVE_STATE))
3393 printk(TPACPI_NOTICE
3394 "failed to save WWAN state to NVRAM\n");
3395 }
3396
3397 static void wan_exit(void)
3398 {
3399 wan_shutdown();
3400
3401 if (tpacpi_wan_rfkill)
3402 rfkill_unregister(tpacpi_wan_rfkill);
3403
3404 sysfs_remove_group(&tpacpi_pdev->dev.kobj,
3405 &wan_attr_group);
3406 }
3407
3408 static int __init wan_init(struct ibm_init_struct *iibm)
3409 {
3410 int res;
3411 int status = 0;
3412
3413 vdbg_printk(TPACPI_DBG_INIT, "initializing wan subdriver\n");
3414
3415 TPACPI_ACPIHANDLE_INIT(hkey);
3416
3417 tp_features.wan = hkey_handle &&
3418 acpi_evalf(hkey_handle, &status, "GWAN", "qd");
3419
3420 vdbg_printk(TPACPI_DBG_INIT, "wan is %s, status 0x%02x\n",
3421 str_supported(tp_features.wan),
3422 status);
3423
3424 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3425 if (dbg_wwanemul) {
3426 tp_features.wan = 1;
3427 printk(TPACPI_INFO
3428 "wwan switch emulation enabled\n");
3429 } else
3430 #endif
3431 if (tp_features.wan &&
3432 !(status & TP_ACPI_WANCARD_HWPRESENT)) {
3433 /* no wan hardware present in system */
3434 tp_features.wan = 0;
3435 dbg_printk(TPACPI_DBG_INIT,
3436 "wan hardware not installed\n");
3437 }
3438
3439 if (!tp_features.wan)
3440 return 1;
3441
3442 res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
3443 &wan_attr_group);
3444 if (res)
3445 return res;
3446
3447 res = tpacpi_new_rfkill(TPACPI_RFK_WWAN_SW_ID,
3448 &tpacpi_wan_rfkill,
3449 RFKILL_TYPE_WWAN,
3450 "tpacpi_wwan_sw",
3451 true,
3452 tpacpi_wan_rfk_set,
3453 tpacpi_wan_rfk_get);
3454 if (res) {
3455 wan_exit();
3456 return res;
3457 }
3458
3459 return 0;
3460 }
3461
3462 /* procfs -------------------------------------------------------------- */
3463 static int wan_read(char *p)
3464 {
3465 int len = 0;
3466 int status = wan_get_radiosw();
3467
3468 if (!tp_features.wan)
3469 len += sprintf(p + len, "status:\t\tnot supported\n");
3470 else {
3471 len += sprintf(p + len, "status:\t\t%s\n",
3472 (status == RFKILL_STATE_UNBLOCKED) ?
3473 "enabled" : "disabled");
3474 len += sprintf(p + len, "commands:\tenable, disable\n");
3475 }
3476
3477 return len;
3478 }
3479
3480 static int wan_write(char *buf)
3481 {
3482 char *cmd;
3483
3484 if (!tp_features.wan)
3485 return -ENODEV;
3486
3487 while ((cmd = next_cmd(&buf))) {
3488 if (strlencmp(cmd, "enable") == 0) {
3489 wan_set_radiosw(1, 1);
3490 } else if (strlencmp(cmd, "disable") == 0) {
3491 wan_set_radiosw(0, 1);
3492 } else
3493 return -EINVAL;
3494 }
3495
3496 return 0;
3497 }
3498
3499 static struct ibm_struct wan_driver_data = {
3500 .name = "wan",
3501 .read = wan_read,
3502 .write = wan_write,
3503 .exit = wan_exit,
3504 .suspend = wan_suspend,
3505 .shutdown = wan_shutdown,
3506 };
3507
3508 /*************************************************************************
3509 * UWB subdriver
3510 */
3511
3512 enum {
3513 /* ACPI GUWB/SUWB bits */
3514 TP_ACPI_UWB_HWPRESENT = 0x01, /* UWB hw available */
3515 TP_ACPI_UWB_RADIOSSW = 0x02, /* UWB radio enabled */
3516 };
3517
3518 static struct rfkill *tpacpi_uwb_rfkill;
3519
3520 static int uwb_get_radiosw(void)
3521 {
3522 int status;
3523
3524 if (!tp_features.uwb)
3525 return -ENODEV;
3526
3527 /* WLSW overrides UWB in firmware/hardware, reflect that */
3528 if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&status) && !status)
3529 return RFKILL_STATE_HARD_BLOCKED;
3530
3531 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3532 if (dbg_uwbemul)
3533 return (tpacpi_uwb_emulstate) ?
3534 RFKILL_STATE_UNBLOCKED : RFKILL_STATE_SOFT_BLOCKED;
3535 #endif
3536
3537 if (!acpi_evalf(hkey_handle, &status, "GUWB", "d"))
3538 return -EIO;
3539
3540 return ((status & TP_ACPI_UWB_RADIOSSW) != 0) ?
3541 RFKILL_STATE_UNBLOCKED : RFKILL_STATE_SOFT_BLOCKED;
3542 }
3543
3544 static void uwb_update_rfk(void)
3545 {
3546 int status;
3547
3548 if (!tpacpi_uwb_rfkill)
3549 return;
3550
3551 status = uwb_get_radiosw();
3552 if (status < 0)
3553 return;
3554 rfkill_force_state(tpacpi_uwb_rfkill, status);
3555 }
3556
3557 static int uwb_set_radiosw(int radio_on, int update_rfk)
3558 {
3559 int status;
3560
3561 if (!tp_features.uwb)
3562 return -ENODEV;
3563
3564 /* WLSW overrides UWB in firmware/hardware, but there is no
3565 * reason to risk weird behaviour. */
3566 if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&status) && !status
3567 && radio_on)
3568 return -EPERM;
3569
3570 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3571 if (dbg_uwbemul) {
3572 tpacpi_uwb_emulstate = !!radio_on;
3573 if (update_rfk)
3574 uwb_update_rfk();
3575 return 0;
3576 }
3577 #endif
3578
3579 status = (radio_on) ? TP_ACPI_UWB_RADIOSSW : 0;
3580 if (!acpi_evalf(hkey_handle, NULL, "SUWB", "vd", status))
3581 return -EIO;
3582
3583 if (update_rfk)
3584 uwb_update_rfk();
3585
3586 return 0;
3587 }
3588
3589 /* --------------------------------------------------------------------- */
3590
3591 static int tpacpi_uwb_rfk_get(void *data, enum rfkill_state *state)
3592 {
3593 int uwbs = uwb_get_radiosw();
3594
3595 if (uwbs < 0)
3596 return uwbs;
3597
3598 *state = uwbs;
3599 return 0;
3600 }
3601
3602 static int tpacpi_uwb_rfk_set(void *data, enum rfkill_state state)
3603 {
3604 return uwb_set_radiosw((state == RFKILL_STATE_UNBLOCKED), 0);
3605 }
3606
3607 static void uwb_exit(void)
3608 {
3609 if (tpacpi_uwb_rfkill)
3610 rfkill_unregister(tpacpi_uwb_rfkill);
3611 }
3612
3613 static int __init uwb_init(struct ibm_init_struct *iibm)
3614 {
3615 int res;
3616 int status = 0;
3617
3618 vdbg_printk(TPACPI_DBG_INIT, "initializing uwb subdriver\n");
3619
3620 TPACPI_ACPIHANDLE_INIT(hkey);
3621
3622 tp_features.uwb = hkey_handle &&
3623 acpi_evalf(hkey_handle, &status, "GUWB", "qd");
3624
3625 vdbg_printk(TPACPI_DBG_INIT, "uwb is %s, status 0x%02x\n",
3626 str_supported(tp_features.uwb),
3627 status);
3628
3629 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3630 if (dbg_uwbemul) {
3631 tp_features.uwb = 1;
3632 printk(TPACPI_INFO
3633 "uwb switch emulation enabled\n");
3634 } else
3635 #endif
3636 if (tp_features.uwb &&
3637 !(status & TP_ACPI_UWB_HWPRESENT)) {
3638 /* no uwb hardware present in system */
3639 tp_features.uwb = 0;
3640 dbg_printk(TPACPI_DBG_INIT,
3641 "uwb hardware not installed\n");
3642 }
3643
3644 if (!tp_features.uwb)
3645 return 1;
3646
3647 res = tpacpi_new_rfkill(TPACPI_RFK_UWB_SW_ID,
3648 &tpacpi_uwb_rfkill,
3649 RFKILL_TYPE_UWB,
3650 "tpacpi_uwb_sw",
3651 false,
3652 tpacpi_uwb_rfk_set,
3653 tpacpi_uwb_rfk_get);
3654
3655 return res;
3656 }
3657
3658 static struct ibm_struct uwb_driver_data = {
3659 .name = "uwb",
3660 .exit = uwb_exit,
3661 .flags.experimental = 1,
3662 };
3663
3664 /*************************************************************************
3665 * Video subdriver
3666 */
3667
3668 #ifdef CONFIG_THINKPAD_ACPI_VIDEO
3669
3670 enum video_access_mode {
3671 TPACPI_VIDEO_NONE = 0,
3672 TPACPI_VIDEO_570, /* 570 */
3673 TPACPI_VIDEO_770, /* 600e/x, 770e, 770x */
3674 TPACPI_VIDEO_NEW, /* all others */
3675 };
3676
3677 enum { /* video status flags, based on VIDEO_570 */
3678 TP_ACPI_VIDEO_S_LCD = 0x01, /* LCD output enabled */
3679 TP_ACPI_VIDEO_S_CRT = 0x02, /* CRT output enabled */
3680 TP_ACPI_VIDEO_S_DVI = 0x08, /* DVI output enabled */
3681 };
3682
3683 enum { /* TPACPI_VIDEO_570 constants */
3684 TP_ACPI_VIDEO_570_PHSCMD = 0x87, /* unknown magic constant :( */
3685 TP_ACPI_VIDEO_570_PHSMASK = 0x03, /* PHS bits that map to
3686 * video_status_flags */
3687 TP_ACPI_VIDEO_570_PHS2CMD = 0x8b, /* unknown magic constant :( */
3688 TP_ACPI_VIDEO_570_PHS2SET = 0x80, /* unknown magic constant :( */
3689 };
3690
3691 static enum video_access_mode video_supported;
3692 static int video_orig_autosw;
3693
3694 static int video_autosw_get(void);
3695 static int video_autosw_set(int enable);
3696
3697 TPACPI_HANDLE(vid2, root, "\\_SB.PCI0.AGPB.VID"); /* G41 */
3698
3699 static int __init video_init(struct ibm_init_struct *iibm)
3700 {
3701 int ivga;
3702
3703 vdbg_printk(TPACPI_DBG_INIT, "initializing video subdriver\n");
3704
3705 TPACPI_ACPIHANDLE_INIT(vid);
3706 TPACPI_ACPIHANDLE_INIT(vid2);
3707
3708 if (vid2_handle && acpi_evalf(NULL, &ivga, "\\IVGA", "d") && ivga)
3709 /* G41, assume IVGA doesn't change */
3710 vid_handle = vid2_handle;
3711
3712 if (!vid_handle)
3713 /* video switching not supported on R30, R31 */
3714 video_supported = TPACPI_VIDEO_NONE;
3715 else if (acpi_evalf(vid_handle, &video_orig_autosw, "SWIT", "qd"))
3716 /* 570 */
3717 video_supported = TPACPI_VIDEO_570;
3718 else if (acpi_evalf(vid_handle, &video_orig_autosw, "^VADL", "qd"))
3719 /* 600e/x, 770e, 770x */
3720 video_supported = TPACPI_VIDEO_770;
3721 else
3722 /* all others */
3723 video_supported = TPACPI_VIDEO_NEW;
3724
3725 vdbg_printk(TPACPI_DBG_INIT, "video is %s, mode %d\n",
3726 str_supported(video_supported != TPACPI_VIDEO_NONE),
3727 video_supported);
3728
3729 return (video_supported != TPACPI_VIDEO_NONE)? 0 : 1;
3730 }
3731
3732 static void video_exit(void)
3733 {
3734 dbg_printk(TPACPI_DBG_EXIT,
3735 "restoring original video autoswitch mode\n");
3736 if (video_autosw_set(video_orig_autosw))
3737 printk(TPACPI_ERR "error while trying to restore original "
3738 "video autoswitch mode\n");
3739 }
3740
3741 static int video_outputsw_get(void)
3742 {
3743 int status = 0;
3744 int i;
3745
3746 switch (video_supported) {
3747 case TPACPI_VIDEO_570:
3748 if (!acpi_evalf(NULL, &i, "\\_SB.PHS", "dd",
3749 TP_ACPI_VIDEO_570_PHSCMD))
3750 return -EIO;
3751 status = i & TP_ACPI_VIDEO_570_PHSMASK;
3752 break;
3753 case TPACPI_VIDEO_770:
3754 if (!acpi_evalf(NULL, &i, "\\VCDL", "d"))
3755 return -EIO;
3756 if (i)
3757 status |= TP_ACPI_VIDEO_S_LCD;
3758 if (!acpi_evalf(NULL, &i, "\\VCDC", "d"))
3759 return -EIO;
3760 if (i)
3761 status |= TP_ACPI_VIDEO_S_CRT;
3762 break;
3763 case TPACPI_VIDEO_NEW:
3764 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 1) ||
3765 !acpi_evalf(NULL, &i, "\\VCDC", "d"))
3766 return -EIO;
3767 if (i)
3768 status |= TP_ACPI_VIDEO_S_CRT;
3769
3770 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0) ||
3771 !acpi_evalf(NULL, &i, "\\VCDL", "d"))
3772 return -EIO;
3773 if (i)
3774 status |= TP_ACPI_VIDEO_S_LCD;
3775 if (!acpi_evalf(NULL, &i, "\\VCDD", "d"))
3776 return -EIO;
3777 if (i)
3778 status |= TP_ACPI_VIDEO_S_DVI;
3779 break;
3780 default:
3781 return -ENOSYS;
3782 }
3783
3784 return status;
3785 }
3786
3787 static int video_outputsw_set(int status)
3788 {
3789 int autosw;
3790 int res = 0;
3791
3792 switch (video_supported) {
3793 case TPACPI_VIDEO_570:
3794 res = acpi_evalf(NULL, NULL,
3795 "\\_SB.PHS2", "vdd",
3796 TP_ACPI_VIDEO_570_PHS2CMD,
3797 status | TP_ACPI_VIDEO_570_PHS2SET);
3798 break;
3799 case TPACPI_VIDEO_770:
3800 autosw = video_autosw_get();
3801 if (autosw < 0)
3802 return autosw;
3803
3804 res = video_autosw_set(1);
3805 if (res)
3806 return res;
3807 res = acpi_evalf(vid_handle, NULL,
3808 "ASWT", "vdd", status * 0x100, 0);
3809 if (!autosw && video_autosw_set(autosw)) {
3810 printk(TPACPI_ERR
3811 "video auto-switch left enabled due to error\n");
3812 return -EIO;
3813 }
3814 break;
3815 case TPACPI_VIDEO_NEW:
3816 res = acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0x80) &&
3817 acpi_evalf(NULL, NULL, "\\VSDS", "vdd", status, 1);
3818 break;
3819 default:
3820 return -ENOSYS;
3821 }
3822
3823 return (res)? 0 : -EIO;
3824 }
3825
3826 static int video_autosw_get(void)
3827 {
3828 int autosw = 0;
3829
3830 switch (video_supported) {
3831 case TPACPI_VIDEO_570:
3832 if (!acpi_evalf(vid_handle, &autosw, "SWIT", "d"))
3833 return -EIO;
3834 break;
3835 case TPACPI_VIDEO_770:
3836 case TPACPI_VIDEO_NEW:
3837 if (!acpi_evalf(vid_handle, &autosw, "^VDEE", "d"))
3838 return -EIO;
3839 break;
3840 default:
3841 return -ENOSYS;
3842 }
3843
3844 return autosw & 1;
3845 }
3846
3847 static int video_autosw_set(int enable)
3848 {
3849 if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", (enable)? 1 : 0))
3850 return -EIO;
3851 return 0;
3852 }
3853
3854 static int video_outputsw_cycle(void)
3855 {
3856 int autosw = video_autosw_get();
3857 int res;
3858
3859 if (autosw < 0)
3860 return autosw;
3861
3862 switch (video_supported) {
3863 case TPACPI_VIDEO_570:
3864 res = video_autosw_set(1);
3865 if (res)
3866 return res;
3867 res = acpi_evalf(ec_handle, NULL, "_Q16", "v");
3868 break;
3869 case TPACPI_VIDEO_770:
3870 case TPACPI_VIDEO_NEW:
3871 res = video_autosw_set(1);
3872 if (res)
3873 return res;
3874 res = acpi_evalf(vid_handle, NULL, "VSWT", "v");
3875 break;
3876 default:
3877 return -ENOSYS;
3878 }
3879 if (!autosw && video_autosw_set(autosw)) {
3880 printk(TPACPI_ERR
3881 "video auto-switch left enabled due to error\n");
3882 return -EIO;
3883 }
3884
3885 return (res)? 0 : -EIO;
3886 }
3887
3888 static int video_expand_toggle(void)
3889 {
3890 switch (video_supported) {
3891 case TPACPI_VIDEO_570:
3892 return acpi_evalf(ec_handle, NULL, "_Q17", "v")?
3893 0 : -EIO;
3894 case TPACPI_VIDEO_770:
3895 return acpi_evalf(vid_handle, NULL, "VEXP", "v")?
3896 0 : -EIO;
3897 case TPACPI_VIDEO_NEW:
3898 return acpi_evalf(NULL, NULL, "\\VEXP", "v")?
3899 0 : -EIO;
3900 default:
3901 return -ENOSYS;
3902 }
3903 /* not reached */
3904 }
3905
3906 static int video_read(char *p)
3907 {
3908 int status, autosw;
3909 int len = 0;
3910
3911 if (video_supported == TPACPI_VIDEO_NONE) {
3912 len += sprintf(p + len, "status:\t\tnot supported\n");
3913 return len;
3914 }
3915
3916 status = video_outputsw_get();
3917 if (status < 0)
3918 return status;
3919
3920 autosw = video_autosw_get();
3921 if (autosw < 0)
3922 return autosw;
3923
3924 len += sprintf(p + len, "status:\t\tsupported\n");
3925 len += sprintf(p + len, "lcd:\t\t%s\n", enabled(status, 0));
3926 len += sprintf(p + len, "crt:\t\t%s\n", enabled(status, 1));
3927 if (video_supported == TPACPI_VIDEO_NEW)
3928 len += sprintf(p + len, "dvi:\t\t%s\n", enabled(status, 3));
3929 len += sprintf(p + len, "auto:\t\t%s\n", enabled(autosw, 0));
3930 len += sprintf(p + len, "commands:\tlcd_enable, lcd_disable\n");
3931 len += sprintf(p + len, "commands:\tcrt_enable, crt_disable\n");
3932 if (video_supported == TPACPI_VIDEO_NEW)
3933 len += sprintf(p + len, "commands:\tdvi_enable, dvi_disable\n");
3934 len += sprintf(p + len, "commands:\tauto_enable, auto_disable\n");
3935 len += sprintf(p + len, "commands:\tvideo_switch, expand_toggle\n");
3936
3937 return len;
3938 }
3939
3940 static int video_write(char *buf)
3941 {
3942 char *cmd;
3943 int enable, disable, status;
3944 int res;
3945
3946 if (video_supported == TPACPI_VIDEO_NONE)
3947 return -ENODEV;
3948
3949 enable = 0;
3950 disable = 0;
3951
3952 while ((cmd = next_cmd(&buf))) {
3953 if (strlencmp(cmd, "lcd_enable") == 0) {
3954 enable |= TP_ACPI_VIDEO_S_LCD;
3955 } else if (strlencmp(cmd, "lcd_disable") == 0) {
3956 disable |= TP_ACPI_VIDEO_S_LCD;
3957 } else if (strlencmp(cmd, "crt_enable") == 0) {
3958 enable |= TP_ACPI_VIDEO_S_CRT;
3959 } else if (strlencmp(cmd, "crt_disable") == 0) {
3960 disable |= TP_ACPI_VIDEO_S_CRT;
3961 } else if (video_supported == TPACPI_VIDEO_NEW &&
3962 strlencmp(cmd, "dvi_enable") == 0) {
3963 enable |= TP_ACPI_VIDEO_S_DVI;
3964 } else if (video_supported == TPACPI_VIDEO_NEW &&
3965 strlencmp(cmd, "dvi_disable") == 0) {
3966 disable |= TP_ACPI_VIDEO_S_DVI;
3967 } else if (strlencmp(cmd, "auto_enable") == 0) {
3968 res = video_autosw_set(1);
3969 if (res)
3970 return res;
3971 } else if (strlencmp(cmd, "auto_disable") == 0) {
3972 res = video_autosw_set(0);
3973 if (res)
3974 return res;
3975 } else if (strlencmp(cmd, "video_switch") == 0) {
3976 res = video_outputsw_cycle();
3977 if (res)
3978 return res;
3979 } else if (strlencmp(cmd, "expand_toggle") == 0) {
3980 res = video_expand_toggle();
3981 if (res)
3982 return res;
3983 } else
3984 return -EINVAL;
3985 }
3986
3987 if (enable || disable) {
3988 status = video_outputsw_get();
3989 if (status < 0)
3990 return status;
3991 res = video_outputsw_set((status & ~disable) | enable);
3992 if (res)
3993 return res;
3994 }
3995
3996 return 0;
3997 }
3998
3999 static struct ibm_struct video_driver_data = {
4000 .name = "video",
4001 .read = video_read,
4002 .write = video_write,
4003 .exit = video_exit,
4004 };
4005
4006 #endif /* CONFIG_THINKPAD_ACPI_VIDEO */
4007
4008 /*************************************************************************
4009 * Light (thinklight) subdriver
4010 */
4011
4012 TPACPI_HANDLE(lght, root, "\\LGHT"); /* A21e, A2xm/p, T20-22, X20-21 */
4013 TPACPI_HANDLE(ledb, ec, "LEDB"); /* G4x */
4014
4015 static int light_get_status(void)
4016 {
4017 int status = 0;
4018
4019 if (tp_features.light_status) {
4020 if (!acpi_evalf(ec_handle, &status, "KBLT", "d"))
4021 return -EIO;
4022 return (!!status);
4023 }
4024
4025 return -ENXIO;
4026 }
4027
4028 static int light_set_status(int status)
4029 {
4030 int rc;
4031
4032 if (tp_features.light) {
4033 if (cmos_handle) {
4034 rc = acpi_evalf(cmos_handle, NULL, NULL, "vd",
4035 (status)?
4036 TP_CMOS_THINKLIGHT_ON :
4037 TP_CMOS_THINKLIGHT_OFF);
4038 } else {
4039 rc = acpi_evalf(lght_handle, NULL, NULL, "vd",
4040 (status)? 1 : 0);
4041 }
4042 return (rc)? 0 : -EIO;
4043 }
4044
4045 return -ENXIO;
4046 }
4047
4048 static void light_set_status_worker(struct work_struct *work)
4049 {
4050 struct tpacpi_led_classdev *data =
4051 container_of(work, struct tpacpi_led_classdev, work);
4052
4053 if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING))
4054 light_set_status((data->new_brightness != LED_OFF));
4055 }
4056
4057 static void light_sysfs_set(struct led_classdev *led_cdev,
4058 enum led_brightness brightness)
4059 {
4060 struct tpacpi_led_classdev *data =
4061 container_of(led_cdev,
4062 struct tpacpi_led_classdev,
4063 led_classdev);
4064 data->new_brightness = brightness;
4065 queue_work(tpacpi_wq, &data->work);
4066 }
4067
4068 static enum led_brightness light_sysfs_get(struct led_classdev *led_cdev)
4069 {
4070 return (light_get_status() == 1)? LED_FULL : LED_OFF;
4071 }
4072
4073 static struct tpacpi_led_classdev tpacpi_led_thinklight = {
4074 .led_classdev = {
4075 .name = "tpacpi::thinklight",
4076 .brightness_set = &light_sysfs_set,
4077 .brightness_get = &light_sysfs_get,
4078 }
4079 };
4080
4081 static int __init light_init(struct ibm_init_struct *iibm)
4082 {
4083 int rc;
4084
4085 vdbg_printk(TPACPI_DBG_INIT, "initializing light subdriver\n");
4086
4087 TPACPI_ACPIHANDLE_INIT(ledb);
4088 TPACPI_ACPIHANDLE_INIT(lght);
4089 TPACPI_ACPIHANDLE_INIT(cmos);
4090 INIT_WORK(&tpacpi_led_thinklight.work, light_set_status_worker);
4091
4092 /* light not supported on 570, 600e/x, 770e, 770x, G4x, R30, R31 */
4093 tp_features.light = (cmos_handle || lght_handle) && !ledb_handle;
4094
4095 if (tp_features.light)
4096 /* light status not supported on
4097 570, 600e/x, 770e, 770x, G4x, R30, R31, R32, X20 */
4098 tp_features.light_status =
4099 acpi_evalf(ec_handle, NULL, "KBLT", "qv");
4100
4101 vdbg_printk(TPACPI_DBG_INIT, "light is %s, light status is %s\n",
4102 str_supported(tp_features.light),
4103 str_supported(tp_features.light_status));
4104
4105 if (!tp_features.light)
4106 return 1;
4107
4108 rc = led_classdev_register(&tpacpi_pdev->dev,
4109 &tpacpi_led_thinklight.led_classdev);
4110
4111 if (rc < 0) {
4112 tp_features.light = 0;
4113 tp_features.light_status = 0;
4114 } else {
4115 rc = 0;
4116 }
4117
4118 return rc;
4119 }
4120
4121 static void light_exit(void)
4122 {
4123 led_classdev_unregister(&tpacpi_led_thinklight.led_classdev);
4124 if (work_pending(&tpacpi_led_thinklight.work))
4125 flush_workqueue(tpacpi_wq);
4126 }
4127
4128 static int light_read(char *p)
4129 {
4130 int len = 0;
4131 int status;
4132
4133 if (!tp_features.light) {
4134 len += sprintf(p + len, "status:\t\tnot supported\n");
4135 } else if (!tp_features.light_status) {
4136 len += sprintf(p + len, "status:\t\tunknown\n");
4137 len += sprintf(p + len, "commands:\ton, off\n");
4138 } else {
4139 status = light_get_status();
4140 if (status < 0)
4141 return status;
4142 len += sprintf(p + len, "status:\t\t%s\n", onoff(status, 0));
4143 len += sprintf(p + len, "commands:\ton, off\n");
4144 }
4145
4146 return len;
4147 }
4148
4149 static int light_write(char *buf)
4150 {
4151 char *cmd;
4152 int newstatus = 0;
4153
4154 if (!tp_features.light)
4155 return -ENODEV;
4156
4157 while ((cmd = next_cmd(&buf))) {
4158 if (strlencmp(cmd, "on") == 0) {
4159 newstatus = 1;
4160 } else if (strlencmp(cmd, "off") == 0) {
4161 newstatus = 0;
4162 } else
4163 return -EINVAL;
4164 }
4165
4166 return light_set_status(newstatus);
4167 }
4168
4169 static struct ibm_struct light_driver_data = {
4170 .name = "light",
4171 .read = light_read,
4172 .write = light_write,
4173 .exit = light_exit,
4174 };
4175
4176 /*************************************************************************
4177 * Dock subdriver
4178 */
4179
4180 #ifdef CONFIG_THINKPAD_ACPI_DOCK
4181
4182 static void dock_notify(struct ibm_struct *ibm, u32 event);
4183 static int dock_read(char *p);
4184 static int dock_write(char *buf);
4185
4186 TPACPI_HANDLE(dock, root, "\\_SB.GDCK", /* X30, X31, X40 */
4187 "\\_SB.PCI0.DOCK", /* 600e/x,770e,770x,A2xm/p,T20-22,X20-21 */
4188 "\\_SB.PCI0.PCI1.DOCK", /* all others */
4189 "\\_SB.PCI.ISA.SLCE", /* 570 */
4190 ); /* A21e,G4x,R30,R31,R32,R40,R40e,R50e */
4191
4192 /* don't list other alternatives as we install a notify handler on the 570 */
4193 TPACPI_HANDLE(pci, root, "\\_SB.PCI"); /* 570 */
4194
4195 static const struct acpi_device_id ibm_pci_device_ids[] = {
4196 {PCI_ROOT_HID_STRING, 0},
4197 {"", 0},
4198 };
4199
4200 static struct tp_acpi_drv_struct ibm_dock_acpidriver[2] = {
4201 {
4202 .notify = dock_notify,
4203 .handle = &dock_handle,
4204 .type = ACPI_SYSTEM_NOTIFY,
4205 },
4206 {
4207 /* THIS ONE MUST NEVER BE USED FOR DRIVER AUTOLOADING.
4208 * We just use it to get notifications of dock hotplug
4209 * in very old thinkpads */
4210 .hid = ibm_pci_device_ids,
4211 .notify = dock_notify,
4212 .handle = &pci_handle,
4213 .type = ACPI_SYSTEM_NOTIFY,
4214 },
4215 };
4216
4217 static struct ibm_struct dock_driver_data[2] = {
4218 {
4219 .name = "dock",
4220 .read = dock_read,
4221 .write = dock_write,
4222 .acpi = &ibm_dock_acpidriver[0],
4223 },
4224 {
4225 .name = "dock",
4226 .acpi = &ibm_dock_acpidriver[1],
4227 },
4228 };
4229
4230 #define dock_docked() (_sta(dock_handle) & 1)
4231
4232 static int __init dock_init(struct ibm_init_struct *iibm)
4233 {
4234 vdbg_printk(TPACPI_DBG_INIT, "initializing dock subdriver\n");
4235
4236 TPACPI_ACPIHANDLE_INIT(dock);
4237
4238 vdbg_printk(TPACPI_DBG_INIT, "dock is %s\n",
4239 str_supported(dock_handle != NULL));
4240
4241 return (dock_handle)? 0 : 1;
4242 }
4243
4244 static int __init dock_init2(struct ibm_init_struct *iibm)
4245 {
4246 int dock2_needed;
4247
4248 vdbg_printk(TPACPI_DBG_INIT, "initializing dock subdriver part 2\n");
4249
4250 if (dock_driver_data[0].flags.acpi_driver_registered &&
4251 dock_driver_data[0].flags.acpi_notify_installed) {
4252 TPACPI_ACPIHANDLE_INIT(pci);
4253 dock2_needed = (pci_handle != NULL);
4254 vdbg_printk(TPACPI_DBG_INIT,
4255 "dock PCI handler for the TP 570 is %s\n",
4256 str_supported(dock2_needed));
4257 } else {
4258 vdbg_printk(TPACPI_DBG_INIT,
4259 "dock subdriver part 2 not required\n");
4260 dock2_needed = 0;
4261 }
4262
4263 return (dock2_needed)? 0 : 1;
4264 }
4265
4266 static void dock_notify(struct ibm_struct *ibm, u32 event)
4267 {
4268 int docked = dock_docked();
4269 int pci = ibm->acpi->hid && ibm->acpi->device &&
4270 acpi_match_device_ids(ibm->acpi->device, ibm_pci_device_ids);
4271 int data;
4272
4273 if (event == 1 && !pci) /* 570 */
4274 data = 1; /* button */
4275 else if (event == 1 && pci) /* 570 */
4276 data = 3; /* dock */
4277 else if (event == 3 && docked)
4278 data = 1; /* button */
4279 else if (event == 3 && !docked)
4280 data = 2; /* undock */
4281 else if (event == 0 && docked)
4282 data = 3; /* dock */
4283 else {
4284 printk(TPACPI_ERR "unknown dock event %d, status %d\n",
4285 event, _sta(dock_handle));
4286 data = 0; /* unknown */
4287 }
4288 acpi_bus_generate_proc_event(ibm->acpi->device, event, data);
4289 acpi_bus_generate_netlink_event(ibm->acpi->device->pnp.device_class,
4290 dev_name(&ibm->acpi->device->dev),
4291 event, data);
4292 }
4293
4294 static int dock_read(char *p)
4295 {
4296 int len = 0;
4297 int docked = dock_docked();
4298
4299 if (!dock_handle)
4300 len += sprintf(p + len, "status:\t\tnot supported\n");
4301 else if (!docked)
4302 len += sprintf(p + len, "status:\t\tundocked\n");
4303 else {
4304 len += sprintf(p + len, "status:\t\tdocked\n");
4305 len += sprintf(p + len, "commands:\tdock, undock\n");
4306 }
4307
4308 return len;
4309 }
4310
4311 static int dock_write(char *buf)
4312 {
4313 char *cmd;
4314
4315 if (!dock_docked())
4316 return -ENODEV;
4317
4318 while ((cmd = next_cmd(&buf))) {
4319 if (strlencmp(cmd, "undock") == 0) {
4320 if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 0) ||
4321 !acpi_evalf(dock_handle, NULL, "_EJ0", "vd", 1))
4322 return -EIO;
4323 } else if (strlencmp(cmd, "dock") == 0) {
4324 if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 1))
4325 return -EIO;
4326 } else
4327 return -EINVAL;
4328 }
4329
4330 return 0;
4331 }
4332
4333 #endif /* CONFIG_THINKPAD_ACPI_DOCK */
4334
4335 /*************************************************************************
4336 * Bay subdriver
4337 */
4338
4339 #ifdef CONFIG_THINKPAD_ACPI_BAY
4340
4341 TPACPI_HANDLE(bay, root, "\\_SB.PCI.IDE.SECN.MAST", /* 570 */
4342 "\\_SB.PCI0.IDE0.IDES.IDSM", /* 600e/x, 770e, 770x */
4343 "\\_SB.PCI0.SATA.SCND.MSTR", /* T60, X60, Z60 */
4344 "\\_SB.PCI0.IDE0.SCND.MSTR", /* all others */
4345 ); /* A21e, R30, R31 */
4346 TPACPI_HANDLE(bay_ej, bay, "_EJ3", /* 600e/x, A2xm/p, A3x */
4347 "_EJ0", /* all others */
4348 ); /* 570,A21e,G4x,R30,R31,R32,R40e,R50e */
4349 TPACPI_HANDLE(bay2, root, "\\_SB.PCI0.IDE0.PRIM.SLAV", /* A3x, R32 */
4350 "\\_SB.PCI0.IDE0.IDEP.IDPS", /* 600e/x, 770e, 770x */
4351 ); /* all others */
4352 TPACPI_HANDLE(bay2_ej, bay2, "_EJ3", /* 600e/x, 770e, A3x */
4353 "_EJ0", /* 770x */
4354 ); /* all others */
4355
4356 static int __init bay_init(struct ibm_init_struct *iibm)
4357 {
4358 vdbg_printk(TPACPI_DBG_INIT, "initializing bay subdriver\n");
4359
4360 TPACPI_ACPIHANDLE_INIT(bay);
4361 if (bay_handle)
4362 TPACPI_ACPIHANDLE_INIT(bay_ej);
4363 TPACPI_ACPIHANDLE_INIT(bay2);
4364 if (bay2_handle)
4365 TPACPI_ACPIHANDLE_INIT(bay2_ej);
4366
4367 tp_features.bay_status = bay_handle &&
4368 acpi_evalf(bay_handle, NULL, "_STA", "qv");
4369 tp_features.bay_status2 = bay2_handle &&
4370 acpi_evalf(bay2_handle, NULL, "_STA", "qv");
4371
4372 tp_features.bay_eject = bay_handle && bay_ej_handle &&
4373 (strlencmp(bay_ej_path, "_EJ0") == 0 || experimental);
4374 tp_features.bay_eject2 = bay2_handle && bay2_ej_handle &&
4375 (strlencmp(bay2_ej_path, "_EJ0") == 0 || experimental);
4376
4377 vdbg_printk(TPACPI_DBG_INIT,
4378 "bay 1: status %s, eject %s; bay 2: status %s, eject %s\n",
4379 str_supported(tp_features.bay_status),
4380 str_supported(tp_features.bay_eject),
4381 str_supported(tp_features.bay_status2),
4382 str_supported(tp_features.bay_eject2));
4383
4384 return (tp_features.bay_status || tp_features.bay_eject ||
4385 tp_features.bay_status2 || tp_features.bay_eject2)? 0 : 1;
4386 }
4387
4388 static void bay_notify(struct ibm_struct *ibm, u32 event)
4389 {
4390 acpi_bus_generate_proc_event(ibm->acpi->device, event, 0);
4391 acpi_bus_generate_netlink_event(ibm->acpi->device->pnp.device_class,
4392 dev_name(&ibm->acpi->device->dev),
4393 event, 0);
4394 }
4395
4396 #define bay_occupied(b) (_sta(b##_handle) & 1)
4397
4398 static int bay_read(char *p)
4399 {
4400 int len = 0;
4401 int occupied = bay_occupied(bay);
4402 int occupied2 = bay_occupied(bay2);
4403 int eject, eject2;
4404
4405 len += sprintf(p + len, "status:\t\t%s\n",
4406 tp_features.bay_status ?
4407 (occupied ? "occupied" : "unoccupied") :
4408 "not supported");
4409 if (tp_features.bay_status2)
4410 len += sprintf(p + len, "status2:\t%s\n", occupied2 ?
4411 "occupied" : "unoccupied");
4412
4413 eject = tp_features.bay_eject && occupied;
4414 eject2 = tp_features.bay_eject2 && occupied2;
4415
4416 if (eject && eject2)
4417 len += sprintf(p + len, "commands:\teject, eject2\n");
4418 else if (eject)
4419 len += sprintf(p + len, "commands:\teject\n");
4420 else if (eject2)
4421 len += sprintf(p + len, "commands:\teject2\n");
4422
4423 return len;
4424 }
4425
4426 static int bay_write(char *buf)
4427 {
4428 char *cmd;
4429
4430 if (!tp_features.bay_eject && !tp_features.bay_eject2)
4431 return -ENODEV;
4432
4433 while ((cmd = next_cmd(&buf))) {
4434 if (tp_features.bay_eject && strlencmp(cmd, "eject") == 0) {
4435 if (!acpi_evalf(bay_ej_handle, NULL, NULL, "vd", 1))
4436 return -EIO;
4437 } else if (tp_features.bay_eject2 &&
4438 strlencmp(cmd, "eject2") == 0) {
4439 if (!acpi_evalf(bay2_ej_handle, NULL, NULL, "vd", 1))
4440 return -EIO;
4441 } else
4442 return -EINVAL;
4443 }
4444
4445 return 0;
4446 }
4447
4448 static struct tp_acpi_drv_struct ibm_bay_acpidriver = {
4449 .notify = bay_notify,
4450 .handle = &bay_handle,
4451 .type = ACPI_SYSTEM_NOTIFY,
4452 };
4453
4454 static struct ibm_struct bay_driver_data = {
4455 .name = "bay",
4456 .read = bay_read,
4457 .write = bay_write,
4458 .acpi = &ibm_bay_acpidriver,
4459 };
4460
4461 #endif /* CONFIG_THINKPAD_ACPI_BAY */
4462
4463 /*************************************************************************
4464 * CMOS subdriver
4465 */
4466
4467 /* sysfs cmos_command -------------------------------------------------- */
4468 static ssize_t cmos_command_store(struct device *dev,
4469 struct device_attribute *attr,
4470 const char *buf, size_t count)
4471 {
4472 unsigned long cmos_cmd;
4473 int res;
4474
4475 if (parse_strtoul(buf, 21, &cmos_cmd))
4476 return -EINVAL;
4477
4478 res = issue_thinkpad_cmos_command(cmos_cmd);
4479 return (res)? res : count;
4480 }
4481
4482 static struct device_attribute dev_attr_cmos_command =
4483 __ATTR(cmos_command, S_IWUSR, NULL, cmos_command_store);
4484
4485 /* --------------------------------------------------------------------- */
4486
4487 static int __init cmos_init(struct ibm_init_struct *iibm)
4488 {
4489 int res;
4490
4491 vdbg_printk(TPACPI_DBG_INIT,
4492 "initializing cmos commands subdriver\n");
4493
4494 TPACPI_ACPIHANDLE_INIT(cmos);
4495
4496 vdbg_printk(TPACPI_DBG_INIT, "cmos commands are %s\n",
4497 str_supported(cmos_handle != NULL));
4498
4499 res = device_create_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
4500 if (res)
4501 return res;
4502
4503 return (cmos_handle)? 0 : 1;
4504 }
4505
4506 static void cmos_exit(void)
4507 {
4508 device_remove_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
4509 }
4510
4511 static int cmos_read(char *p)
4512 {
4513 int len = 0;
4514
4515 /* cmos not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
4516 R30, R31, T20-22, X20-21 */
4517 if (!cmos_handle)
4518 len += sprintf(p + len, "status:\t\tnot supported\n");
4519 else {
4520 len += sprintf(p + len, "status:\t\tsupported\n");
4521 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-21)\n");
4522 }
4523
4524 return len;
4525 }
4526
4527 static int cmos_write(char *buf)
4528 {
4529 char *cmd;
4530 int cmos_cmd, res;
4531
4532 while ((cmd = next_cmd(&buf))) {
4533 if (sscanf(cmd, "%u", &cmos_cmd) == 1 &&
4534 cmos_cmd >= 0 && cmos_cmd <= 21) {
4535 /* cmos_cmd set */
4536 } else
4537 return -EINVAL;
4538
4539 res = issue_thinkpad_cmos_command(cmos_cmd);
4540 if (res)
4541 return res;
4542 }
4543
4544 return 0;
4545 }
4546
4547 static struct ibm_struct cmos_driver_data = {
4548 .name = "cmos",
4549 .read = cmos_read,
4550 .write = cmos_write,
4551 .exit = cmos_exit,
4552 };
4553
4554 /*************************************************************************
4555 * LED subdriver
4556 */
4557
4558 enum led_access_mode {
4559 TPACPI_LED_NONE = 0,
4560 TPACPI_LED_570, /* 570 */
4561 TPACPI_LED_OLD, /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
4562 TPACPI_LED_NEW, /* all others */
4563 };
4564
4565 enum { /* For TPACPI_LED_OLD */
4566 TPACPI_LED_EC_HLCL = 0x0c, /* EC reg to get led to power on */
4567 TPACPI_LED_EC_HLBL = 0x0d, /* EC reg to blink a lit led */
4568 TPACPI_LED_EC_HLMS = 0x0e, /* EC reg to select led to command */
4569 };
4570
4571 enum led_status_t {
4572 TPACPI_LED_OFF = 0,
4573 TPACPI_LED_ON,
4574 TPACPI_LED_BLINK,
4575 };
4576
4577 static enum led_access_mode led_supported;
4578
4579 TPACPI_HANDLE(led, ec, "SLED", /* 570 */
4580 "SYSL", /* 600e/x, 770e, 770x, A21e, A2xm/p, */
4581 /* T20-22, X20-21 */
4582 "LED", /* all others */
4583 ); /* R30, R31 */
4584
4585 #define TPACPI_LED_NUMLEDS 8
4586 static struct tpacpi_led_classdev *tpacpi_leds;
4587 static enum led_status_t tpacpi_led_state_cache[TPACPI_LED_NUMLEDS];
4588 static const char * const tpacpi_led_names[TPACPI_LED_NUMLEDS] = {
4589 /* there's a limit of 19 chars + NULL before 2.6.26 */
4590 "tpacpi::power",
4591 "tpacpi:orange:batt",
4592 "tpacpi:green:batt",
4593 "tpacpi::dock_active",
4594 "tpacpi::bay_active",
4595 "tpacpi::dock_batt",
4596 "tpacpi::unknown_led",
4597 "tpacpi::standby",
4598 };
4599
4600 static int led_get_status(const unsigned int led)
4601 {
4602 int status;
4603 enum led_status_t led_s;
4604
4605 switch (led_supported) {
4606 case TPACPI_LED_570:
4607 if (!acpi_evalf(ec_handle,
4608 &status, "GLED", "dd", 1 << led))
4609 return -EIO;
4610 led_s = (status == 0)?
4611 TPACPI_LED_OFF :
4612 ((status == 1)?
4613 TPACPI_LED_ON :
4614 TPACPI_LED_BLINK);
4615 tpacpi_led_state_cache[led] = led_s;
4616 return led_s;
4617 default:
4618 return -ENXIO;
4619 }
4620
4621 /* not reached */
4622 }
4623
4624 static int led_set_status(const unsigned int led,
4625 const enum led_status_t ledstatus)
4626 {
4627 /* off, on, blink. Index is led_status_t */
4628 static const unsigned int led_sled_arg1[] = { 0, 1, 3 };
4629 static const unsigned int led_led_arg1[] = { 0, 0x80, 0xc0 };
4630
4631 int rc = 0;
4632
4633 switch (led_supported) {
4634 case TPACPI_LED_570:
4635 /* 570 */
4636 if (led > 7)
4637 return -EINVAL;
4638 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
4639 (1 << led), led_sled_arg1[ledstatus]))
4640 rc = -EIO;
4641 break;
4642 case TPACPI_LED_OLD:
4643 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */
4644 if (led > 7)
4645 return -EINVAL;
4646 rc = ec_write(TPACPI_LED_EC_HLMS, (1 << led));
4647 if (rc >= 0)
4648 rc = ec_write(TPACPI_LED_EC_HLBL,
4649 (ledstatus == TPACPI_LED_BLINK) << led);
4650 if (rc >= 0)
4651 rc = ec_write(TPACPI_LED_EC_HLCL,
4652 (ledstatus != TPACPI_LED_OFF) << led);
4653 break;
4654 case TPACPI_LED_NEW:
4655 /* all others */
4656 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
4657 led, led_led_arg1[ledstatus]))
4658 rc = -EIO;
4659 break;
4660 default:
4661 rc = -ENXIO;
4662 }
4663
4664 if (!rc)
4665 tpacpi_led_state_cache[led] = ledstatus;
4666
4667 return rc;
4668 }
4669
4670 static void led_sysfs_set_status(unsigned int led,
4671 enum led_brightness brightness)
4672 {
4673 led_set_status(led,
4674 (brightness == LED_OFF) ?
4675 TPACPI_LED_OFF :
4676 (tpacpi_led_state_cache[led] == TPACPI_LED_BLINK) ?
4677 TPACPI_LED_BLINK : TPACPI_LED_ON);
4678 }
4679
4680 static void led_set_status_worker(struct work_struct *work)
4681 {
4682 struct tpacpi_led_classdev *data =
4683 container_of(work, struct tpacpi_led_classdev, work);
4684
4685 if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING))
4686 led_sysfs_set_status(data->led, data->new_brightness);
4687 }
4688
4689 static void led_sysfs_set(struct led_classdev *led_cdev,
4690 enum led_brightness brightness)
4691 {
4692 struct tpacpi_led_classdev *data = container_of(led_cdev,
4693 struct tpacpi_led_classdev, led_classdev);
4694
4695 data->new_brightness = brightness;
4696 queue_work(tpacpi_wq, &data->work);
4697 }
4698
4699 static int led_sysfs_blink_set(struct led_classdev *led_cdev,
4700 unsigned long *delay_on, unsigned long *delay_off)
4701 {
4702 struct tpacpi_led_classdev *data = container_of(led_cdev,
4703 struct tpacpi_led_classdev, led_classdev);
4704
4705 /* Can we choose the flash rate? */
4706 if (*delay_on == 0 && *delay_off == 0) {
4707 /* yes. set them to the hardware blink rate (1 Hz) */
4708 *delay_on = 500; /* ms */
4709 *delay_off = 500; /* ms */
4710 } else if ((*delay_on != 500) || (*delay_off != 500))
4711 return -EINVAL;
4712
4713 data->new_brightness = TPACPI_LED_BLINK;
4714 queue_work(tpacpi_wq, &data->work);
4715
4716 return 0;
4717 }
4718
4719 static enum led_brightness led_sysfs_get(struct led_classdev *led_cdev)
4720 {
4721 int rc;
4722
4723 struct tpacpi_led_classdev *data = container_of(led_cdev,
4724 struct tpacpi_led_classdev, led_classdev);
4725
4726 rc = led_get_status(data->led);
4727
4728 if (rc == TPACPI_LED_OFF || rc < 0)
4729 rc = LED_OFF; /* no error handling in led class :( */
4730 else
4731 rc = LED_FULL;
4732
4733 return rc;
4734 }
4735
4736 static void led_exit(void)
4737 {
4738 unsigned int i;
4739
4740 for (i = 0; i < TPACPI_LED_NUMLEDS; i++) {
4741 if (tpacpi_leds[i].led_classdev.name)
4742 led_classdev_unregister(&tpacpi_leds[i].led_classdev);
4743 }
4744
4745 kfree(tpacpi_leds);
4746 }
4747
4748 static int __init led_init(struct ibm_init_struct *iibm)
4749 {
4750 unsigned int i;
4751 int rc;
4752
4753 vdbg_printk(TPACPI_DBG_INIT, "initializing LED subdriver\n");
4754
4755 TPACPI_ACPIHANDLE_INIT(led);
4756
4757 if (!led_handle)
4758 /* led not supported on R30, R31 */
4759 led_supported = TPACPI_LED_NONE;
4760 else if (strlencmp(led_path, "SLED") == 0)
4761 /* 570 */
4762 led_supported = TPACPI_LED_570;
4763 else if (strlencmp(led_path, "SYSL") == 0)
4764 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
4765 led_supported = TPACPI_LED_OLD;
4766 else
4767 /* all others */
4768 led_supported = TPACPI_LED_NEW;
4769
4770 vdbg_printk(TPACPI_DBG_INIT, "LED commands are %s, mode %d\n",
4771 str_supported(led_supported), led_supported);
4772
4773 tpacpi_leds = kzalloc(sizeof(*tpacpi_leds) * TPACPI_LED_NUMLEDS,
4774 GFP_KERNEL);
4775 if (!tpacpi_leds) {
4776 printk(TPACPI_ERR "Out of memory for LED data\n");
4777 return -ENOMEM;
4778 }
4779
4780 for (i = 0; i < TPACPI_LED_NUMLEDS; i++) {
4781 tpacpi_leds[i].led = i;
4782
4783 tpacpi_leds[i].led_classdev.brightness_set = &led_sysfs_set;
4784 tpacpi_leds[i].led_classdev.blink_set = &led_sysfs_blink_set;
4785 if (led_supported == TPACPI_LED_570)
4786 tpacpi_leds[i].led_classdev.brightness_get =
4787 &led_sysfs_get;
4788
4789 tpacpi_leds[i].led_classdev.name = tpacpi_led_names[i];
4790
4791 INIT_WORK(&tpacpi_leds[i].work, led_set_status_worker);
4792
4793 rc = led_classdev_register(&tpacpi_pdev->dev,
4794 &tpacpi_leds[i].led_classdev);
4795 if (rc < 0) {
4796 tpacpi_leds[i].led_classdev.name = NULL;
4797 led_exit();
4798 return rc;
4799 }
4800 }
4801
4802 return (led_supported != TPACPI_LED_NONE)? 0 : 1;
4803 }
4804
4805 #define str_led_status(s) \
4806 ((s) == TPACPI_LED_OFF ? "off" : \
4807 ((s) == TPACPI_LED_ON ? "on" : "blinking"))
4808
4809 static int led_read(char *p)
4810 {
4811 int len = 0;
4812
4813 if (!led_supported) {
4814 len += sprintf(p + len, "status:\t\tnot supported\n");
4815 return len;
4816 }
4817 len += sprintf(p + len, "status:\t\tsupported\n");
4818
4819 if (led_supported == TPACPI_LED_570) {
4820 /* 570 */
4821 int i, status;
4822 for (i = 0; i < 8; i++) {
4823 status = led_get_status(i);
4824 if (status < 0)
4825 return -EIO;
4826 len += sprintf(p + len, "%d:\t\t%s\n",
4827 i, str_led_status(status));
4828 }
4829 }
4830
4831 len += sprintf(p + len, "commands:\t"
4832 "<led> on, <led> off, <led> blink (<led> is 0-7)\n");
4833
4834 return len;
4835 }
4836
4837 static int led_write(char *buf)
4838 {
4839 char *cmd;
4840 int led, rc;
4841 enum led_status_t s;
4842
4843 if (!led_supported)
4844 return -ENODEV;
4845
4846 while ((cmd = next_cmd(&buf))) {
4847 if (sscanf(cmd, "%d", &led) != 1 || led < 0 || led > 7)
4848 return -EINVAL;
4849
4850 if (strstr(cmd, "off")) {
4851 s = TPACPI_LED_OFF;
4852 } else if (strstr(cmd, "on")) {
4853 s = TPACPI_LED_ON;
4854 } else if (strstr(cmd, "blink")) {
4855 s = TPACPI_LED_BLINK;
4856 } else {
4857 return -EINVAL;
4858 }
4859
4860 rc = led_set_status(led, s);
4861 if (rc < 0)
4862 return rc;
4863 }
4864
4865 return 0;
4866 }
4867
4868 static struct ibm_struct led_driver_data = {
4869 .name = "led",
4870 .read = led_read,
4871 .write = led_write,
4872 .exit = led_exit,
4873 };
4874
4875 /*************************************************************************
4876 * Beep subdriver
4877 */
4878
4879 TPACPI_HANDLE(beep, ec, "BEEP"); /* all except R30, R31 */
4880
4881 static int __init beep_init(struct ibm_init_struct *iibm)
4882 {
4883 vdbg_printk(TPACPI_DBG_INIT, "initializing beep subdriver\n");
4884
4885 TPACPI_ACPIHANDLE_INIT(beep);
4886
4887 vdbg_printk(TPACPI_DBG_INIT, "beep is %s\n",
4888 str_supported(beep_handle != NULL));
4889
4890 return (beep_handle)? 0 : 1;
4891 }
4892
4893 static int beep_read(char *p)
4894 {
4895 int len = 0;
4896
4897 if (!beep_handle)
4898 len += sprintf(p + len, "status:\t\tnot supported\n");
4899 else {
4900 len += sprintf(p + len, "status:\t\tsupported\n");
4901 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-17)\n");
4902 }
4903
4904 return len;
4905 }
4906
4907 static int beep_write(char *buf)
4908 {
4909 char *cmd;
4910 int beep_cmd;
4911
4912 if (!beep_handle)
4913 return -ENODEV;
4914
4915 while ((cmd = next_cmd(&buf))) {
4916 if (sscanf(cmd, "%u", &beep_cmd) == 1 &&
4917 beep_cmd >= 0 && beep_cmd <= 17) {
4918 /* beep_cmd set */
4919 } else
4920 return -EINVAL;
4921 if (!acpi_evalf(beep_handle, NULL, NULL, "vdd", beep_cmd, 0))
4922 return -EIO;
4923 }
4924
4925 return 0;
4926 }
4927
4928 static struct ibm_struct beep_driver_data = {
4929 .name = "beep",
4930 .read = beep_read,
4931 .write = beep_write,
4932 };
4933
4934 /*************************************************************************
4935 * Thermal subdriver
4936 */
4937
4938 enum thermal_access_mode {
4939 TPACPI_THERMAL_NONE = 0, /* No thermal support */
4940 TPACPI_THERMAL_ACPI_TMP07, /* Use ACPI TMP0-7 */
4941 TPACPI_THERMAL_ACPI_UPDT, /* Use ACPI TMP0-7 with UPDT */
4942 TPACPI_THERMAL_TPEC_8, /* Use ACPI EC regs, 8 sensors */
4943 TPACPI_THERMAL_TPEC_16, /* Use ACPI EC regs, 16 sensors */
4944 };
4945
4946 enum { /* TPACPI_THERMAL_TPEC_* */
4947 TP_EC_THERMAL_TMP0 = 0x78, /* ACPI EC regs TMP 0..7 */
4948 TP_EC_THERMAL_TMP8 = 0xC0, /* ACPI EC regs TMP 8..15 */
4949 TP_EC_THERMAL_TMP_NA = -128, /* ACPI EC sensor not available */
4950 };
4951
4952 #define TPACPI_MAX_THERMAL_SENSORS 16 /* Max thermal sensors supported */
4953 struct ibm_thermal_sensors_struct {
4954 s32 temp[TPACPI_MAX_THERMAL_SENSORS];
4955 };
4956
4957 static enum thermal_access_mode thermal_read_mode;
4958
4959 /* idx is zero-based */
4960 static int thermal_get_sensor(int idx, s32 *value)
4961 {
4962 int t;
4963 s8 tmp;
4964 char tmpi[5];
4965
4966 t = TP_EC_THERMAL_TMP0;
4967
4968 switch (thermal_read_mode) {
4969 #if TPACPI_MAX_THERMAL_SENSORS >= 16
4970 case TPACPI_THERMAL_TPEC_16:
4971 if (idx >= 8 && idx <= 15) {
4972 t = TP_EC_THERMAL_TMP8;
4973 idx -= 8;
4974 }
4975 /* fallthrough */
4976 #endif
4977 case TPACPI_THERMAL_TPEC_8:
4978 if (idx <= 7) {
4979 if (!acpi_ec_read(t + idx, &tmp))
4980 return -EIO;
4981 *value = tmp * 1000;
4982 return 0;
4983 }
4984 break;
4985
4986 case TPACPI_THERMAL_ACPI_UPDT:
4987 if (idx <= 7) {
4988 snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
4989 if (!acpi_evalf(ec_handle, NULL, "UPDT", "v"))
4990 return -EIO;
4991 if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
4992 return -EIO;
4993 *value = (t - 2732) * 100;
4994 return 0;
4995 }
4996 break;
4997
4998 case TPACPI_THERMAL_ACPI_TMP07:
4999 if (idx <= 7) {
5000 snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
5001 if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
5002 return -EIO;
5003 if (t > 127 || t < -127)
5004 t = TP_EC_THERMAL_TMP_NA;
5005 *value = t * 1000;
5006 return 0;
5007 }
5008 break;
5009
5010 case TPACPI_THERMAL_NONE:
5011 default:
5012 return -ENOSYS;
5013 }
5014
5015 return -EINVAL;
5016 }
5017
5018 static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s)
5019 {
5020 int res, i;
5021 int n;
5022
5023 n = 8;
5024 i = 0;
5025
5026 if (!s)
5027 return -EINVAL;
5028
5029 if (thermal_read_mode == TPACPI_THERMAL_TPEC_16)
5030 n = 16;
5031
5032 for (i = 0 ; i < n; i++) {
5033 res = thermal_get_sensor(i, &s->temp[i]);
5034 if (res)
5035 return res;
5036 }
5037
5038 return n;
5039 }
5040
5041 /* sysfs temp##_input -------------------------------------------------- */
5042
5043 static ssize_t thermal_temp_input_show(struct device *dev,
5044 struct device_attribute *attr,
5045 char *buf)
5046 {
5047 struct sensor_device_attribute *sensor_attr =
5048 to_sensor_dev_attr(attr);
5049 int idx = sensor_attr->index;
5050 s32 value;
5051 int res;
5052
5053 res = thermal_get_sensor(idx, &value);
5054 if (res)
5055 return res;
5056 if (value == TP_EC_THERMAL_TMP_NA * 1000)
5057 return -ENXIO;
5058
5059 return snprintf(buf, PAGE_SIZE, "%d\n", value);
5060 }
5061
5062 #define THERMAL_SENSOR_ATTR_TEMP(_idxA, _idxB) \
5063 SENSOR_ATTR(temp##_idxA##_input, S_IRUGO, \
5064 thermal_temp_input_show, NULL, _idxB)
5065
5066 static struct sensor_device_attribute sensor_dev_attr_thermal_temp_input[] = {
5067 THERMAL_SENSOR_ATTR_TEMP(1, 0),
5068 THERMAL_SENSOR_ATTR_TEMP(2, 1),
5069 THERMAL_SENSOR_ATTR_TEMP(3, 2),
5070 THERMAL_SENSOR_ATTR_TEMP(4, 3),
5071 THERMAL_SENSOR_ATTR_TEMP(5, 4),
5072 THERMAL_SENSOR_ATTR_TEMP(6, 5),
5073 THERMAL_SENSOR_ATTR_TEMP(7, 6),
5074 THERMAL_SENSOR_ATTR_TEMP(8, 7),
5075 THERMAL_SENSOR_ATTR_TEMP(9, 8),
5076 THERMAL_SENSOR_ATTR_TEMP(10, 9),
5077 THERMAL_SENSOR_ATTR_TEMP(11, 10),
5078 THERMAL_SENSOR_ATTR_TEMP(12, 11),
5079 THERMAL_SENSOR_ATTR_TEMP(13, 12),
5080 THERMAL_SENSOR_ATTR_TEMP(14, 13),
5081 THERMAL_SENSOR_ATTR_TEMP(15, 14),
5082 THERMAL_SENSOR_ATTR_TEMP(16, 15),
5083 };
5084
5085 #define THERMAL_ATTRS(X) \
5086 &sensor_dev_attr_thermal_temp_input[X].dev_attr.attr
5087
5088 static struct attribute *thermal_temp_input_attr[] = {
5089 THERMAL_ATTRS(8),
5090 THERMAL_ATTRS(9),
5091 THERMAL_ATTRS(10),
5092 THERMAL_ATTRS(11),
5093 THERMAL_ATTRS(12),
5094 THERMAL_ATTRS(13),
5095 THERMAL_ATTRS(14),
5096 THERMAL_ATTRS(15),
5097 THERMAL_ATTRS(0),
5098 THERMAL_ATTRS(1),
5099 THERMAL_ATTRS(2),
5100 THERMAL_ATTRS(3),
5101 THERMAL_ATTRS(4),
5102 THERMAL_ATTRS(5),
5103 THERMAL_ATTRS(6),
5104 THERMAL_ATTRS(7),
5105 NULL
5106 };
5107
5108 static const struct attribute_group thermal_temp_input16_group = {
5109 .attrs = thermal_temp_input_attr
5110 };
5111
5112 static const struct attribute_group thermal_temp_input8_group = {
5113 .attrs = &thermal_temp_input_attr[8]
5114 };
5115
5116 #undef THERMAL_SENSOR_ATTR_TEMP
5117 #undef THERMAL_ATTRS
5118
5119 /* --------------------------------------------------------------------- */
5120
5121 static int __init thermal_init(struct ibm_init_struct *iibm)
5122 {
5123 u8 t, ta1, ta2;
5124 int i;
5125 int acpi_tmp7;
5126 int res;
5127
5128 vdbg_printk(TPACPI_DBG_INIT, "initializing thermal subdriver\n");
5129
5130 acpi_tmp7 = acpi_evalf(ec_handle, NULL, "TMP7", "qv");
5131
5132 if (thinkpad_id.ec_model) {
5133 /*
5134 * Direct EC access mode: sensors at registers
5135 * 0x78-0x7F, 0xC0-0xC7. Registers return 0x00 for
5136 * non-implemented, thermal sensors return 0x80 when
5137 * not available
5138 */
5139
5140 ta1 = ta2 = 0;
5141 for (i = 0; i < 8; i++) {
5142 if (acpi_ec_read(TP_EC_THERMAL_TMP0 + i, &t)) {
5143 ta1 |= t;
5144 } else {
5145 ta1 = 0;
5146 break;
5147 }
5148 if (acpi_ec_read(TP_EC_THERMAL_TMP8 + i, &t)) {
5149 ta2 |= t;
5150 } else {
5151 ta1 = 0;
5152 break;
5153 }
5154 }
5155 if (ta1 == 0) {
5156 /* This is sheer paranoia, but we handle it anyway */
5157 if (acpi_tmp7) {
5158 printk(TPACPI_ERR
5159 "ThinkPad ACPI EC access misbehaving, "
5160 "falling back to ACPI TMPx access "
5161 "mode\n");
5162 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
5163 } else {
5164 printk(TPACPI_ERR
5165 "ThinkPad ACPI EC access misbehaving, "
5166 "disabling thermal sensors access\n");
5167 thermal_read_mode = TPACPI_THERMAL_NONE;
5168 }
5169 } else {
5170 thermal_read_mode =
5171 (ta2 != 0) ?
5172 TPACPI_THERMAL_TPEC_16 : TPACPI_THERMAL_TPEC_8;
5173 }
5174 } else if (acpi_tmp7) {
5175 if (acpi_evalf(ec_handle, NULL, "UPDT", "qv")) {
5176 /* 600e/x, 770e, 770x */
5177 thermal_read_mode = TPACPI_THERMAL_ACPI_UPDT;
5178 } else {
5179 /* Standard ACPI TMPx access, max 8 sensors */
5180 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
5181 }
5182 } else {
5183 /* temperatures not supported on 570, G4x, R30, R31, R32 */
5184 thermal_read_mode = TPACPI_THERMAL_NONE;
5185 }
5186
5187 vdbg_printk(TPACPI_DBG_INIT, "thermal is %s, mode %d\n",
5188 str_supported(thermal_read_mode != TPACPI_THERMAL_NONE),
5189 thermal_read_mode);
5190
5191 switch (thermal_read_mode) {
5192 case TPACPI_THERMAL_TPEC_16:
5193 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
5194 &thermal_temp_input16_group);
5195 if (res)
5196 return res;
5197 break;
5198 case TPACPI_THERMAL_TPEC_8:
5199 case TPACPI_THERMAL_ACPI_TMP07:
5200 case TPACPI_THERMAL_ACPI_UPDT:
5201 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
5202 &thermal_temp_input8_group);
5203 if (res)
5204 return res;
5205 break;
5206 case TPACPI_THERMAL_NONE:
5207 default:
5208 return 1;
5209 }
5210
5211 return 0;
5212 }
5213
5214 static void thermal_exit(void)
5215 {
5216 switch (thermal_read_mode) {
5217 case TPACPI_THERMAL_TPEC_16:
5218 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
5219 &thermal_temp_input16_group);
5220 break;
5221 case TPACPI_THERMAL_TPEC_8:
5222 case TPACPI_THERMAL_ACPI_TMP07:
5223 case TPACPI_THERMAL_ACPI_UPDT:
5224 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
5225 &thermal_temp_input16_group);
5226 break;
5227 case TPACPI_THERMAL_NONE:
5228 default:
5229 break;
5230 }
5231 }
5232
5233 static int thermal_read(char *p)
5234 {
5235 int len = 0;
5236 int n, i;
5237 struct ibm_thermal_sensors_struct t;
5238
5239 n = thermal_get_sensors(&t);
5240 if (unlikely(n < 0))
5241 return n;
5242
5243 len += sprintf(p + len, "temperatures:\t");
5244
5245 if (n > 0) {
5246 for (i = 0; i < (n - 1); i++)
5247 len += sprintf(p + len, "%d ", t.temp[i] / 1000);
5248 len += sprintf(p + len, "%d\n", t.temp[i] / 1000);
5249 } else
5250 len += sprintf(p + len, "not supported\n");
5251
5252 return len;
5253 }
5254
5255 static struct ibm_struct thermal_driver_data = {
5256 .name = "thermal",
5257 .read = thermal_read,
5258 .exit = thermal_exit,
5259 };
5260
5261 /*************************************************************************
5262 * EC Dump subdriver
5263 */
5264
5265 static u8 ecdump_regs[256];
5266
5267 static int ecdump_read(char *p)
5268 {
5269 int len = 0;
5270 int i, j;
5271 u8 v;
5272
5273 len += sprintf(p + len, "EC "
5274 " +00 +01 +02 +03 +04 +05 +06 +07"
5275 " +08 +09 +0a +0b +0c +0d +0e +0f\n");
5276 for (i = 0; i < 256; i += 16) {
5277 len += sprintf(p + len, "EC 0x%02x:", i);
5278 for (j = 0; j < 16; j++) {
5279 if (!acpi_ec_read(i + j, &v))
5280 break;
5281 if (v != ecdump_regs[i + j])
5282 len += sprintf(p + len, " *%02x", v);
5283 else
5284 len += sprintf(p + len, " %02x", v);
5285 ecdump_regs[i + j] = v;
5286 }
5287 len += sprintf(p + len, "\n");
5288 if (j != 16)
5289 break;
5290 }
5291
5292 /* These are way too dangerous to advertise openly... */
5293 #if 0
5294 len += sprintf(p + len, "commands:\t0x<offset> 0x<value>"
5295 " (<offset> is 00-ff, <value> is 00-ff)\n");
5296 len += sprintf(p + len, "commands:\t0x<offset> <value> "
5297 " (<offset> is 00-ff, <value> is 0-255)\n");
5298 #endif
5299 return len;
5300 }
5301
5302 static int ecdump_write(char *buf)
5303 {
5304 char *cmd;
5305 int i, v;
5306
5307 while ((cmd = next_cmd(&buf))) {
5308 if (sscanf(cmd, "0x%x 0x%x", &i, &v) == 2) {
5309 /* i and v set */
5310 } else if (sscanf(cmd, "0x%x %u", &i, &v) == 2) {
5311 /* i and v set */
5312 } else
5313 return -EINVAL;
5314 if (i >= 0 && i < 256 && v >= 0 && v < 256) {
5315 if (!acpi_ec_write(i, v))
5316 return -EIO;
5317 } else
5318 return -EINVAL;
5319 }
5320
5321 return 0;
5322 }
5323
5324 static struct ibm_struct ecdump_driver_data = {
5325 .name = "ecdump",
5326 .read = ecdump_read,
5327 .write = ecdump_write,
5328 .flags.experimental = 1,
5329 };
5330
5331 /*************************************************************************
5332 * Backlight/brightness subdriver
5333 */
5334
5335 #define TPACPI_BACKLIGHT_DEV_NAME "thinkpad_screen"
5336
5337 enum {
5338 TP_EC_BACKLIGHT = 0x31,
5339
5340 /* TP_EC_BACKLIGHT bitmasks */
5341 TP_EC_BACKLIGHT_LVLMSK = 0x1F,
5342 TP_EC_BACKLIGHT_CMDMSK = 0xE0,
5343 TP_EC_BACKLIGHT_MAPSW = 0x20,
5344 };
5345
5346 static struct backlight_device *ibm_backlight_device;
5347 static int brightness_mode;
5348 static unsigned int brightness_enable = 2; /* 2 = auto, 0 = no, 1 = yes */
5349
5350 static struct mutex brightness_mutex;
5351
5352 /*
5353 * ThinkPads can read brightness from two places: EC 0x31, or
5354 * CMOS NVRAM byte 0x5E, bits 0-3.
5355 *
5356 * EC 0x31 has the following layout
5357 * Bit 7: unknown function
5358 * Bit 6: unknown function
5359 * Bit 5: Z: honour scale changes, NZ: ignore scale changes
5360 * Bit 4: must be set to zero to avoid problems
5361 * Bit 3-0: backlight brightness level
5362 *
5363 * brightness_get_raw returns status data in the EC 0x31 layout
5364 */
5365 static int brightness_get_raw(int *status)
5366 {
5367 u8 lec = 0, lcmos = 0, level = 0;
5368
5369 if (brightness_mode & 1) {
5370 if (!acpi_ec_read(TP_EC_BACKLIGHT, &lec))
5371 return -EIO;
5372 level = lec & TP_EC_BACKLIGHT_LVLMSK;
5373 };
5374 if (brightness_mode & 2) {
5375 lcmos = (nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS)
5376 & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
5377 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
5378 lcmos &= (tp_features.bright_16levels)? 0x0f : 0x07;
5379 level = lcmos;
5380 }
5381
5382 if (brightness_mode == 3) {
5383 *status = lec; /* Prefer EC, CMOS is just a backing store */
5384 lec &= TP_EC_BACKLIGHT_LVLMSK;
5385 if (lec == lcmos)
5386 tp_warned.bright_cmos_ec_unsync = 0;
5387 else {
5388 if (!tp_warned.bright_cmos_ec_unsync) {
5389 printk(TPACPI_ERR
5390 "CMOS NVRAM (%u) and EC (%u) do not "
5391 "agree on display brightness level\n",
5392 (unsigned int) lcmos,
5393 (unsigned int) lec);
5394 tp_warned.bright_cmos_ec_unsync = 1;
5395 }
5396 return -EIO;
5397 }
5398 } else {
5399 *status = level;
5400 }
5401
5402 return 0;
5403 }
5404
5405 /* May return EINTR which can always be mapped to ERESTARTSYS */
5406 static int brightness_set(int value)
5407 {
5408 int cmos_cmd, inc, i, res;
5409 int current_value;
5410 int command_bits;
5411
5412 if (value > ((tp_features.bright_16levels)? 15 : 7) ||
5413 value < 0)
5414 return -EINVAL;
5415
5416 res = mutex_lock_killable(&brightness_mutex);
5417 if (res < 0)
5418 return res;
5419
5420 res = brightness_get_raw(&current_value);
5421 if (res < 0)
5422 goto errout;
5423
5424 command_bits = current_value & TP_EC_BACKLIGHT_CMDMSK;
5425 current_value &= TP_EC_BACKLIGHT_LVLMSK;
5426
5427 cmos_cmd = value > current_value ?
5428 TP_CMOS_BRIGHTNESS_UP :
5429 TP_CMOS_BRIGHTNESS_DOWN;
5430 inc = (value > current_value)? 1 : -1;
5431
5432 res = 0;
5433 for (i = current_value; i != value; i += inc) {
5434 if ((brightness_mode & 2) &&
5435 issue_thinkpad_cmos_command(cmos_cmd)) {
5436 res = -EIO;
5437 goto errout;
5438 }
5439 if ((brightness_mode & 1) &&
5440 !acpi_ec_write(TP_EC_BACKLIGHT,
5441 (i + inc) | command_bits)) {
5442 res = -EIO;
5443 goto errout;;
5444 }
5445 }
5446
5447 errout:
5448 mutex_unlock(&brightness_mutex);
5449 return res;
5450 }
5451
5452 /* sysfs backlight class ----------------------------------------------- */
5453
5454 static int brightness_update_status(struct backlight_device *bd)
5455 {
5456 /* it is the backlight class's job (caller) to handle
5457 * EINTR and other errors properly */
5458 return brightness_set(
5459 (bd->props.fb_blank == FB_BLANK_UNBLANK &&
5460 bd->props.power == FB_BLANK_UNBLANK) ?
5461 bd->props.brightness : 0);
5462 }
5463
5464 static int brightness_get(struct backlight_device *bd)
5465 {
5466 int status, res;
5467
5468 res = brightness_get_raw(&status);
5469 if (res < 0)
5470 return 0; /* FIXME: teach backlight about error handling */
5471
5472 return status & TP_EC_BACKLIGHT_LVLMSK;
5473 }
5474
5475 static struct backlight_ops ibm_backlight_data = {
5476 .get_brightness = brightness_get,
5477 .update_status = brightness_update_status,
5478 };
5479
5480 /* --------------------------------------------------------------------- */
5481
5482 static int __init brightness_init(struct ibm_init_struct *iibm)
5483 {
5484 int b;
5485
5486 vdbg_printk(TPACPI_DBG_INIT, "initializing brightness subdriver\n");
5487
5488 mutex_init(&brightness_mutex);
5489
5490 /*
5491 * We always attempt to detect acpi support, so as to switch
5492 * Lenovo Vista BIOS to ACPI brightness mode even if we are not
5493 * going to publish a backlight interface
5494 */
5495 b = tpacpi_check_std_acpi_brightness_support();
5496 if (b > 0) {
5497
5498 if (acpi_video_backlight_support()) {
5499 if (brightness_enable > 1) {
5500 printk(TPACPI_NOTICE
5501 "Standard ACPI backlight interface "
5502 "available, not loading native one.\n");
5503 return 1;
5504 } else if (brightness_enable == 1) {
5505 printk(TPACPI_NOTICE
5506 "Backlight control force enabled, even if standard "
5507 "ACPI backlight interface is available\n");
5508 }
5509 } else {
5510 if (brightness_enable > 1) {
5511 printk(TPACPI_NOTICE
5512 "Standard ACPI backlight interface not "
5513 "available, thinkpad_acpi native "
5514 "brightness control enabled\n");
5515 }
5516 }
5517 }
5518
5519 if (!brightness_enable) {
5520 dbg_printk(TPACPI_DBG_INIT,
5521 "brightness support disabled by "
5522 "module parameter\n");
5523 return 1;
5524 }
5525
5526 if (b > 16) {
5527 printk(TPACPI_ERR
5528 "Unsupported brightness interface, "
5529 "please contact %s\n", TPACPI_MAIL);
5530 return 1;
5531 }
5532 if (b == 16)
5533 tp_features.bright_16levels = 1;
5534
5535 if (!brightness_mode) {
5536 if (thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO)
5537 brightness_mode = 2;
5538 else
5539 brightness_mode = 3;
5540
5541 dbg_printk(TPACPI_DBG_INIT, "selected brightness_mode=%d\n",
5542 brightness_mode);
5543 }
5544
5545 if (brightness_mode > 3)
5546 return -EINVAL;
5547
5548 if (brightness_get_raw(&b) < 0)
5549 return 1;
5550
5551 if (tp_features.bright_16levels)
5552 printk(TPACPI_INFO
5553 "detected a 16-level brightness capable ThinkPad\n");
5554
5555 ibm_backlight_device = backlight_device_register(
5556 TPACPI_BACKLIGHT_DEV_NAME, NULL, NULL,
5557 &ibm_backlight_data);
5558 if (IS_ERR(ibm_backlight_device)) {
5559 printk(TPACPI_ERR "Could not register backlight device\n");
5560 return PTR_ERR(ibm_backlight_device);
5561 }
5562 vdbg_printk(TPACPI_DBG_INIT, "brightness is supported\n");
5563
5564 ibm_backlight_device->props.max_brightness =
5565 (tp_features.bright_16levels)? 15 : 7;
5566 ibm_backlight_device->props.brightness = b & TP_EC_BACKLIGHT_LVLMSK;
5567 backlight_update_status(ibm_backlight_device);
5568
5569 return 0;
5570 }
5571
5572 static void brightness_exit(void)
5573 {
5574 if (ibm_backlight_device) {
5575 vdbg_printk(TPACPI_DBG_EXIT,
5576 "calling backlight_device_unregister()\n");
5577 backlight_device_unregister(ibm_backlight_device);
5578 }
5579 }
5580
5581 static int brightness_read(char *p)
5582 {
5583 int len = 0;
5584 int level;
5585
5586 level = brightness_get(NULL);
5587 if (level < 0) {
5588 len += sprintf(p + len, "level:\t\tunreadable\n");
5589 } else {
5590 len += sprintf(p + len, "level:\t\t%d\n", level);
5591 len += sprintf(p + len, "commands:\tup, down\n");
5592 len += sprintf(p + len, "commands:\tlevel <level>"
5593 " (<level> is 0-%d)\n",
5594 (tp_features.bright_16levels) ? 15 : 7);
5595 }
5596
5597 return len;
5598 }
5599
5600 static int brightness_write(char *buf)
5601 {
5602 int level;
5603 int rc;
5604 char *cmd;
5605 int max_level = (tp_features.bright_16levels) ? 15 : 7;
5606
5607 level = brightness_get(NULL);
5608 if (level < 0)
5609 return level;
5610
5611 while ((cmd = next_cmd(&buf))) {
5612 if (strlencmp(cmd, "up") == 0) {
5613 if (level < max_level)
5614 level++;
5615 } else if (strlencmp(cmd, "down") == 0) {
5616 if (level > 0)
5617 level--;
5618 } else if (sscanf(cmd, "level %d", &level) == 1 &&
5619 level >= 0 && level <= max_level) {
5620 /* new level set */
5621 } else
5622 return -EINVAL;
5623 }
5624
5625 /*
5626 * Now we know what the final level should be, so we try to set it.
5627 * Doing it this way makes the syscall restartable in case of EINTR
5628 */
5629 rc = brightness_set(level);
5630 return (rc == -EINTR)? ERESTARTSYS : rc;
5631 }
5632
5633 static struct ibm_struct brightness_driver_data = {
5634 .name = "brightness",
5635 .read = brightness_read,
5636 .write = brightness_write,
5637 .exit = brightness_exit,
5638 };
5639
5640 /*************************************************************************
5641 * Volume subdriver
5642 */
5643
5644 static int volume_offset = 0x30;
5645
5646 static int volume_read(char *p)
5647 {
5648 int len = 0;
5649 u8 level;
5650
5651 if (!acpi_ec_read(volume_offset, &level)) {
5652 len += sprintf(p + len, "level:\t\tunreadable\n");
5653 } else {
5654 len += sprintf(p + len, "level:\t\t%d\n", level & 0xf);
5655 len += sprintf(p + len, "mute:\t\t%s\n", onoff(level, 6));
5656 len += sprintf(p + len, "commands:\tup, down, mute\n");
5657 len += sprintf(p + len, "commands:\tlevel <level>"
5658 " (<level> is 0-15)\n");
5659 }
5660
5661 return len;
5662 }
5663
5664 static int volume_write(char *buf)
5665 {
5666 int cmos_cmd, inc, i;
5667 u8 level, mute;
5668 int new_level, new_mute;
5669 char *cmd;
5670
5671 while ((cmd = next_cmd(&buf))) {
5672 if (!acpi_ec_read(volume_offset, &level))
5673 return -EIO;
5674 new_mute = mute = level & 0x40;
5675 new_level = level = level & 0xf;
5676
5677 if (strlencmp(cmd, "up") == 0) {
5678 if (mute)
5679 new_mute = 0;
5680 else
5681 new_level = level == 15 ? 15 : level + 1;
5682 } else if (strlencmp(cmd, "down") == 0) {
5683 if (mute)
5684 new_mute = 0;
5685 else
5686 new_level = level == 0 ? 0 : level - 1;
5687 } else if (sscanf(cmd, "level %d", &new_level) == 1 &&
5688 new_level >= 0 && new_level <= 15) {
5689 /* new_level set */
5690 } else if (strlencmp(cmd, "mute") == 0) {
5691 new_mute = 0x40;
5692 } else
5693 return -EINVAL;
5694
5695 if (new_level != level) {
5696 /* mute doesn't change */
5697
5698 cmos_cmd = (new_level > level) ?
5699 TP_CMOS_VOLUME_UP : TP_CMOS_VOLUME_DOWN;
5700 inc = new_level > level ? 1 : -1;
5701
5702 if (mute && (issue_thinkpad_cmos_command(cmos_cmd) ||
5703 !acpi_ec_write(volume_offset, level)))
5704 return -EIO;
5705
5706 for (i = level; i != new_level; i += inc)
5707 if (issue_thinkpad_cmos_command(cmos_cmd) ||
5708 !acpi_ec_write(volume_offset, i + inc))
5709 return -EIO;
5710
5711 if (mute &&
5712 (issue_thinkpad_cmos_command(TP_CMOS_VOLUME_MUTE) ||
5713 !acpi_ec_write(volume_offset, new_level + mute))) {
5714 return -EIO;
5715 }
5716 }
5717
5718 if (new_mute != mute) {
5719 /* level doesn't change */
5720
5721 cmos_cmd = (new_mute) ?
5722 TP_CMOS_VOLUME_MUTE : TP_CMOS_VOLUME_UP;
5723
5724 if (issue_thinkpad_cmos_command(cmos_cmd) ||
5725 !acpi_ec_write(volume_offset, level + new_mute))
5726 return -EIO;
5727 }
5728 }
5729
5730 return 0;
5731 }
5732
5733 static struct ibm_struct volume_driver_data = {
5734 .name = "volume",
5735 .read = volume_read,
5736 .write = volume_write,
5737 };
5738
5739 /*************************************************************************
5740 * Fan subdriver
5741 */
5742
5743 /*
5744 * FAN ACCESS MODES
5745 *
5746 * TPACPI_FAN_RD_ACPI_GFAN:
5747 * ACPI GFAN method: returns fan level
5748 *
5749 * see TPACPI_FAN_WR_ACPI_SFAN
5750 * EC 0x2f (HFSP) not available if GFAN exists
5751 *
5752 * TPACPI_FAN_WR_ACPI_SFAN:
5753 * ACPI SFAN method: sets fan level, 0 (stop) to 7 (max)
5754 *
5755 * EC 0x2f (HFSP) might be available *for reading*, but do not use
5756 * it for writing.
5757 *
5758 * TPACPI_FAN_WR_TPEC:
5759 * ThinkPad EC register 0x2f (HFSP): fan control loop mode
5760 * Supported on almost all ThinkPads
5761 *
5762 * Fan speed changes of any sort (including those caused by the
5763 * disengaged mode) are usually done slowly by the firmware as the
5764 * maximum ammount of fan duty cycle change per second seems to be
5765 * limited.
5766 *
5767 * Reading is not available if GFAN exists.
5768 * Writing is not available if SFAN exists.
5769 *
5770 * Bits
5771 * 7 automatic mode engaged;
5772 * (default operation mode of the ThinkPad)
5773 * fan level is ignored in this mode.
5774 * 6 full speed mode (takes precedence over bit 7);
5775 * not available on all thinkpads. May disable
5776 * the tachometer while the fan controller ramps up
5777 * the speed (which can take up to a few *minutes*).
5778 * Speeds up fan to 100% duty-cycle, which is far above
5779 * the standard RPM levels. It is not impossible that
5780 * it could cause hardware damage.
5781 * 5-3 unused in some models. Extra bits for fan level
5782 * in others, but still useless as all values above
5783 * 7 map to the same speed as level 7 in these models.
5784 * 2-0 fan level (0..7 usually)
5785 * 0x00 = stop
5786 * 0x07 = max (set when temperatures critical)
5787 * Some ThinkPads may have other levels, see
5788 * TPACPI_FAN_WR_ACPI_FANS (X31/X40/X41)
5789 *
5790 * FIRMWARE BUG: on some models, EC 0x2f might not be initialized at
5791 * boot. Apparently the EC does not intialize it, so unless ACPI DSDT
5792 * does so, its initial value is meaningless (0x07).
5793 *
5794 * For firmware bugs, refer to:
5795 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
5796 *
5797 * ----
5798 *
5799 * ThinkPad EC register 0x84 (LSB), 0x85 (MSB):
5800 * Main fan tachometer reading (in RPM)
5801 *
5802 * This register is present on all ThinkPads with a new-style EC, and
5803 * it is known not to be present on the A21m/e, and T22, as there is
5804 * something else in offset 0x84 according to the ACPI DSDT. Other
5805 * ThinkPads from this same time period (and earlier) probably lack the
5806 * tachometer as well.
5807 *
5808 * Unfortunately a lot of ThinkPads with new-style ECs but whose firwmare
5809 * was never fixed by IBM to report the EC firmware version string
5810 * probably support the tachometer (like the early X models), so
5811 * detecting it is quite hard. We need more data to know for sure.
5812 *
5813 * FIRMWARE BUG: always read 0x84 first, otherwise incorrect readings
5814 * might result.
5815 *
5816 * FIRMWARE BUG: may go stale while the EC is switching to full speed
5817 * mode.
5818 *
5819 * For firmware bugs, refer to:
5820 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
5821 *
5822 * TPACPI_FAN_WR_ACPI_FANS:
5823 * ThinkPad X31, X40, X41. Not available in the X60.
5824 *
5825 * FANS ACPI handle: takes three arguments: low speed, medium speed,
5826 * high speed. ACPI DSDT seems to map these three speeds to levels
5827 * as follows: STOP LOW LOW MED MED HIGH HIGH HIGH HIGH
5828 * (this map is stored on FAN0..FAN8 as "0,1,1,2,2,3,3,3,3")
5829 *
5830 * The speeds are stored on handles
5831 * (FANA:FAN9), (FANC:FANB), (FANE:FAND).
5832 *
5833 * There are three default speed sets, acessible as handles:
5834 * FS1L,FS1M,FS1H; FS2L,FS2M,FS2H; FS3L,FS3M,FS3H
5835 *
5836 * ACPI DSDT switches which set is in use depending on various
5837 * factors.
5838 *
5839 * TPACPI_FAN_WR_TPEC is also available and should be used to
5840 * command the fan. The X31/X40/X41 seems to have 8 fan levels,
5841 * but the ACPI tables just mention level 7.
5842 */
5843
5844 enum { /* Fan control constants */
5845 fan_status_offset = 0x2f, /* EC register 0x2f */
5846 fan_rpm_offset = 0x84, /* EC register 0x84: LSB, 0x85 MSB (RPM)
5847 * 0x84 must be read before 0x85 */
5848
5849 TP_EC_FAN_FULLSPEED = 0x40, /* EC fan mode: full speed */
5850 TP_EC_FAN_AUTO = 0x80, /* EC fan mode: auto fan control */
5851
5852 TPACPI_FAN_LAST_LEVEL = 0x100, /* Use cached last-seen fan level */
5853 };
5854
5855 enum fan_status_access_mode {
5856 TPACPI_FAN_NONE = 0, /* No fan status or control */
5857 TPACPI_FAN_RD_ACPI_GFAN, /* Use ACPI GFAN */
5858 TPACPI_FAN_RD_TPEC, /* Use ACPI EC regs 0x2f, 0x84-0x85 */
5859 };
5860
5861 enum fan_control_access_mode {
5862 TPACPI_FAN_WR_NONE = 0, /* No fan control */
5863 TPACPI_FAN_WR_ACPI_SFAN, /* Use ACPI SFAN */
5864 TPACPI_FAN_WR_TPEC, /* Use ACPI EC reg 0x2f */
5865 TPACPI_FAN_WR_ACPI_FANS, /* Use ACPI FANS and EC reg 0x2f */
5866 };
5867
5868 enum fan_control_commands {
5869 TPACPI_FAN_CMD_SPEED = 0x0001, /* speed command */
5870 TPACPI_FAN_CMD_LEVEL = 0x0002, /* level command */
5871 TPACPI_FAN_CMD_ENABLE = 0x0004, /* enable/disable cmd,
5872 * and also watchdog cmd */
5873 };
5874
5875 static int fan_control_allowed;
5876
5877 static enum fan_status_access_mode fan_status_access_mode;
5878 static enum fan_control_access_mode fan_control_access_mode;
5879 static enum fan_control_commands fan_control_commands;
5880
5881 static u8 fan_control_initial_status;
5882 static u8 fan_control_desired_level;
5883 static u8 fan_control_resume_level;
5884 static int fan_watchdog_maxinterval;
5885
5886 static struct mutex fan_mutex;
5887
5888 static void fan_watchdog_fire(struct work_struct *ignored);
5889 static DECLARE_DELAYED_WORK(fan_watchdog_task, fan_watchdog_fire);
5890
5891 TPACPI_HANDLE(fans, ec, "FANS"); /* X31, X40, X41 */
5892 TPACPI_HANDLE(gfan, ec, "GFAN", /* 570 */
5893 "\\FSPD", /* 600e/x, 770e, 770x */
5894 ); /* all others */
5895 TPACPI_HANDLE(sfan, ec, "SFAN", /* 570 */
5896 "JFNS", /* 770x-JL */
5897 ); /* all others */
5898
5899 /*
5900 * Unitialized HFSP quirk: ACPI DSDT and EC fail to initialize the
5901 * HFSP register at boot, so it contains 0x07 but the Thinkpad could
5902 * be in auto mode (0x80).
5903 *
5904 * This is corrected by any write to HFSP either by the driver, or
5905 * by the firmware.
5906 *
5907 * We assume 0x07 really means auto mode while this quirk is active,
5908 * as this is far more likely than the ThinkPad being in level 7,
5909 * which is only used by the firmware during thermal emergencies.
5910 */
5911
5912 static void fan_quirk1_detect(void)
5913 {
5914 /* In some ThinkPads, neither the EC nor the ACPI
5915 * DSDT initialize the HFSP register, and it ends up
5916 * being initially set to 0x07 when it *could* be
5917 * either 0x07 or 0x80.
5918 *
5919 * Enable for TP-1Y (T43), TP-78 (R51e),
5920 * TP-76 (R52), TP-70 (T43, R52), which are known
5921 * to be buggy. */
5922 if (fan_control_initial_status == 0x07) {
5923 switch (thinkpad_id.ec_model) {
5924 case 0x5931: /* TP-1Y */
5925 case 0x3837: /* TP-78 */
5926 case 0x3637: /* TP-76 */
5927 case 0x3037: /* TP-70 */
5928 printk(TPACPI_NOTICE
5929 "fan_init: initial fan status is unknown, "
5930 "assuming it is in auto mode\n");
5931 tp_features.fan_ctrl_status_undef = 1;
5932 ;;
5933 }
5934 }
5935 }
5936
5937 static void fan_quirk1_handle(u8 *fan_status)
5938 {
5939 if (unlikely(tp_features.fan_ctrl_status_undef)) {
5940 if (*fan_status != fan_control_initial_status) {
5941 /* something changed the HFSP regisnter since
5942 * driver init time, so it is not undefined
5943 * anymore */
5944 tp_features.fan_ctrl_status_undef = 0;
5945 } else {
5946 /* Return most likely status. In fact, it
5947 * might be the only possible status */
5948 *fan_status = TP_EC_FAN_AUTO;
5949 }
5950 }
5951 }
5952
5953 /*
5954 * Call with fan_mutex held
5955 */
5956 static void fan_update_desired_level(u8 status)
5957 {
5958 if ((status &
5959 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
5960 if (status > 7)
5961 fan_control_desired_level = 7;
5962 else
5963 fan_control_desired_level = status;
5964 }
5965 }
5966
5967 static int fan_get_status(u8 *status)
5968 {
5969 u8 s;
5970
5971 /* TODO:
5972 * Add TPACPI_FAN_RD_ACPI_FANS ? */
5973
5974 switch (fan_status_access_mode) {
5975 case TPACPI_FAN_RD_ACPI_GFAN:
5976 /* 570, 600e/x, 770e, 770x */
5977
5978 if (unlikely(!acpi_evalf(gfan_handle, &s, NULL, "d")))
5979 return -EIO;
5980
5981 if (likely(status))
5982 *status = s & 0x07;
5983
5984 break;
5985
5986 case TPACPI_FAN_RD_TPEC:
5987 /* all except 570, 600e/x, 770e, 770x */
5988 if (unlikely(!acpi_ec_read(fan_status_offset, &s)))
5989 return -EIO;
5990
5991 if (likely(status)) {
5992 *status = s;
5993 fan_quirk1_handle(status);
5994 }
5995
5996 break;
5997
5998 default:
5999 return -ENXIO;
6000 }
6001
6002 return 0;
6003 }
6004
6005 static int fan_get_status_safe(u8 *status)
6006 {
6007 int rc;
6008 u8 s;
6009
6010 if (mutex_lock_killable(&fan_mutex))
6011 return -ERESTARTSYS;
6012 rc = fan_get_status(&s);
6013 if (!rc)
6014 fan_update_desired_level(s);
6015 mutex_unlock(&fan_mutex);
6016
6017 if (status)
6018 *status = s;
6019
6020 return rc;
6021 }
6022
6023 static int fan_get_speed(unsigned int *speed)
6024 {
6025 u8 hi, lo;
6026
6027 switch (fan_status_access_mode) {
6028 case TPACPI_FAN_RD_TPEC:
6029 /* all except 570, 600e/x, 770e, 770x */
6030 if (unlikely(!acpi_ec_read(fan_rpm_offset, &lo) ||
6031 !acpi_ec_read(fan_rpm_offset + 1, &hi)))
6032 return -EIO;
6033
6034 if (likely(speed))
6035 *speed = (hi << 8) | lo;
6036
6037 break;
6038
6039 default:
6040 return -ENXIO;
6041 }
6042
6043 return 0;
6044 }
6045
6046 static int fan_set_level(int level)
6047 {
6048 if (!fan_control_allowed)
6049 return -EPERM;
6050
6051 switch (fan_control_access_mode) {
6052 case TPACPI_FAN_WR_ACPI_SFAN:
6053 if (level >= 0 && level <= 7) {
6054 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", level))
6055 return -EIO;
6056 } else
6057 return -EINVAL;
6058 break;
6059
6060 case TPACPI_FAN_WR_ACPI_FANS:
6061 case TPACPI_FAN_WR_TPEC:
6062 if (!(level & TP_EC_FAN_AUTO) &&
6063 !(level & TP_EC_FAN_FULLSPEED) &&
6064 ((level < 0) || (level > 7)))
6065 return -EINVAL;
6066
6067 /* safety net should the EC not support AUTO
6068 * or FULLSPEED mode bits and just ignore them */
6069 if (level & TP_EC_FAN_FULLSPEED)
6070 level |= 7; /* safety min speed 7 */
6071 else if (level & TP_EC_FAN_AUTO)
6072 level |= 4; /* safety min speed 4 */
6073
6074 if (!acpi_ec_write(fan_status_offset, level))
6075 return -EIO;
6076 else
6077 tp_features.fan_ctrl_status_undef = 0;
6078 break;
6079
6080 default:
6081 return -ENXIO;
6082 }
6083 return 0;
6084 }
6085
6086 static int fan_set_level_safe(int level)
6087 {
6088 int rc;
6089
6090 if (!fan_control_allowed)
6091 return -EPERM;
6092
6093 if (mutex_lock_killable(&fan_mutex))
6094 return -ERESTARTSYS;
6095
6096 if (level == TPACPI_FAN_LAST_LEVEL)
6097 level = fan_control_desired_level;
6098
6099 rc = fan_set_level(level);
6100 if (!rc)
6101 fan_update_desired_level(level);
6102
6103 mutex_unlock(&fan_mutex);
6104 return rc;
6105 }
6106
6107 static int fan_set_enable(void)
6108 {
6109 u8 s;
6110 int rc;
6111
6112 if (!fan_control_allowed)
6113 return -EPERM;
6114
6115 if (mutex_lock_killable(&fan_mutex))
6116 return -ERESTARTSYS;
6117
6118 switch (fan_control_access_mode) {
6119 case TPACPI_FAN_WR_ACPI_FANS:
6120 case TPACPI_FAN_WR_TPEC:
6121 rc = fan_get_status(&s);
6122 if (rc < 0)
6123 break;
6124
6125 /* Don't go out of emergency fan mode */
6126 if (s != 7) {
6127 s &= 0x07;
6128 s |= TP_EC_FAN_AUTO | 4; /* min fan speed 4 */
6129 }
6130
6131 if (!acpi_ec_write(fan_status_offset, s))
6132 rc = -EIO;
6133 else {
6134 tp_features.fan_ctrl_status_undef = 0;
6135 rc = 0;
6136 }
6137 break;
6138
6139 case TPACPI_FAN_WR_ACPI_SFAN:
6140 rc = fan_get_status(&s);
6141 if (rc < 0)
6142 break;
6143
6144 s &= 0x07;
6145
6146 /* Set fan to at least level 4 */
6147 s |= 4;
6148
6149 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", s))
6150 rc = -EIO;
6151 else
6152 rc = 0;
6153 break;
6154
6155 default:
6156 rc = -ENXIO;
6157 }
6158
6159 mutex_unlock(&fan_mutex);
6160 return rc;
6161 }
6162
6163 static int fan_set_disable(void)
6164 {
6165 int rc;
6166
6167 if (!fan_control_allowed)
6168 return -EPERM;
6169
6170 if (mutex_lock_killable(&fan_mutex))
6171 return -ERESTARTSYS;
6172
6173 rc = 0;
6174 switch (fan_control_access_mode) {
6175 case TPACPI_FAN_WR_ACPI_FANS:
6176 case TPACPI_FAN_WR_TPEC:
6177 if (!acpi_ec_write(fan_status_offset, 0x00))
6178 rc = -EIO;
6179 else {
6180 fan_control_desired_level = 0;
6181 tp_features.fan_ctrl_status_undef = 0;
6182 }
6183 break;
6184
6185 case TPACPI_FAN_WR_ACPI_SFAN:
6186 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", 0x00))
6187 rc = -EIO;
6188 else
6189 fan_control_desired_level = 0;
6190 break;
6191
6192 default:
6193 rc = -ENXIO;
6194 }
6195
6196
6197 mutex_unlock(&fan_mutex);
6198 return rc;
6199 }
6200
6201 static int fan_set_speed(int speed)
6202 {
6203 int rc;
6204
6205 if (!fan_control_allowed)
6206 return -EPERM;
6207
6208 if (mutex_lock_killable(&fan_mutex))
6209 return -ERESTARTSYS;
6210
6211 rc = 0;
6212 switch (fan_control_access_mode) {
6213 case TPACPI_FAN_WR_ACPI_FANS:
6214 if (speed >= 0 && speed <= 65535) {
6215 if (!acpi_evalf(fans_handle, NULL, NULL, "vddd",
6216 speed, speed, speed))
6217 rc = -EIO;
6218 } else
6219 rc = -EINVAL;
6220 break;
6221
6222 default:
6223 rc = -ENXIO;
6224 }
6225
6226 mutex_unlock(&fan_mutex);
6227 return rc;
6228 }
6229
6230 static void fan_watchdog_reset(void)
6231 {
6232 static int fan_watchdog_active;
6233
6234 if (fan_control_access_mode == TPACPI_FAN_WR_NONE)
6235 return;
6236
6237 if (fan_watchdog_active)
6238 cancel_delayed_work(&fan_watchdog_task);
6239
6240 if (fan_watchdog_maxinterval > 0 &&
6241 tpacpi_lifecycle != TPACPI_LIFE_EXITING) {
6242 fan_watchdog_active = 1;
6243 if (!queue_delayed_work(tpacpi_wq, &fan_watchdog_task,
6244 msecs_to_jiffies(fan_watchdog_maxinterval
6245 * 1000))) {
6246 printk(TPACPI_ERR
6247 "failed to queue the fan watchdog, "
6248 "watchdog will not trigger\n");
6249 }
6250 } else
6251 fan_watchdog_active = 0;
6252 }
6253
6254 static void fan_watchdog_fire(struct work_struct *ignored)
6255 {
6256 int rc;
6257
6258 if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
6259 return;
6260
6261 printk(TPACPI_NOTICE "fan watchdog: enabling fan\n");
6262 rc = fan_set_enable();
6263 if (rc < 0) {
6264 printk(TPACPI_ERR "fan watchdog: error %d while enabling fan, "
6265 "will try again later...\n", -rc);
6266 /* reschedule for later */
6267 fan_watchdog_reset();
6268 }
6269 }
6270
6271 /*
6272 * SYSFS fan layout: hwmon compatible (device)
6273 *
6274 * pwm*_enable:
6275 * 0: "disengaged" mode
6276 * 1: manual mode
6277 * 2: native EC "auto" mode (recommended, hardware default)
6278 *
6279 * pwm*: set speed in manual mode, ignored otherwise.
6280 * 0 is level 0; 255 is level 7. Intermediate points done with linear
6281 * interpolation.
6282 *
6283 * fan*_input: tachometer reading, RPM
6284 *
6285 *
6286 * SYSFS fan layout: extensions
6287 *
6288 * fan_watchdog (driver):
6289 * fan watchdog interval in seconds, 0 disables (default), max 120
6290 */
6291
6292 /* sysfs fan pwm1_enable ----------------------------------------------- */
6293 static ssize_t fan_pwm1_enable_show(struct device *dev,
6294 struct device_attribute *attr,
6295 char *buf)
6296 {
6297 int res, mode;
6298 u8 status;
6299
6300 res = fan_get_status_safe(&status);
6301 if (res)
6302 return res;
6303
6304 if (status & TP_EC_FAN_FULLSPEED) {
6305 mode = 0;
6306 } else if (status & TP_EC_FAN_AUTO) {
6307 mode = 2;
6308 } else
6309 mode = 1;
6310
6311 return snprintf(buf, PAGE_SIZE, "%d\n", mode);
6312 }
6313
6314 static ssize_t fan_pwm1_enable_store(struct device *dev,
6315 struct device_attribute *attr,
6316 const char *buf, size_t count)
6317 {
6318 unsigned long t;
6319 int res, level;
6320
6321 if (parse_strtoul(buf, 2, &t))
6322 return -EINVAL;
6323
6324 switch (t) {
6325 case 0:
6326 level = TP_EC_FAN_FULLSPEED;
6327 break;
6328 case 1:
6329 level = TPACPI_FAN_LAST_LEVEL;
6330 break;
6331 case 2:
6332 level = TP_EC_FAN_AUTO;
6333 break;
6334 case 3:
6335 /* reserved for software-controlled auto mode */
6336 return -ENOSYS;
6337 default:
6338 return -EINVAL;
6339 }
6340
6341 res = fan_set_level_safe(level);
6342 if (res == -ENXIO)
6343 return -EINVAL;
6344 else if (res < 0)
6345 return res;
6346
6347 fan_watchdog_reset();
6348
6349 return count;
6350 }
6351
6352 static struct device_attribute dev_attr_fan_pwm1_enable =
6353 __ATTR(pwm1_enable, S_IWUSR | S_IRUGO,
6354 fan_pwm1_enable_show, fan_pwm1_enable_store);
6355
6356 /* sysfs fan pwm1 ------------------------------------------------------ */
6357 static ssize_t fan_pwm1_show(struct device *dev,
6358 struct device_attribute *attr,
6359 char *buf)
6360 {
6361 int res;
6362 u8 status;
6363
6364 res = fan_get_status_safe(&status);
6365 if (res)
6366 return res;
6367
6368 if ((status &
6369 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) != 0)
6370 status = fan_control_desired_level;
6371
6372 if (status > 7)
6373 status = 7;
6374
6375 return snprintf(buf, PAGE_SIZE, "%u\n", (status * 255) / 7);
6376 }
6377
6378 static ssize_t fan_pwm1_store(struct device *dev,
6379 struct device_attribute *attr,
6380 const char *buf, size_t count)
6381 {
6382 unsigned long s;
6383 int rc;
6384 u8 status, newlevel;
6385
6386 if (parse_strtoul(buf, 255, &s))
6387 return -EINVAL;
6388
6389 /* scale down from 0-255 to 0-7 */
6390 newlevel = (s >> 5) & 0x07;
6391
6392 if (mutex_lock_killable(&fan_mutex))
6393 return -ERESTARTSYS;
6394
6395 rc = fan_get_status(&status);
6396 if (!rc && (status &
6397 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
6398 rc = fan_set_level(newlevel);
6399 if (rc == -ENXIO)
6400 rc = -EINVAL;
6401 else if (!rc) {
6402 fan_update_desired_level(newlevel);
6403 fan_watchdog_reset();
6404 }
6405 }
6406
6407 mutex_unlock(&fan_mutex);
6408 return (rc)? rc : count;
6409 }
6410
6411 static struct device_attribute dev_attr_fan_pwm1 =
6412 __ATTR(pwm1, S_IWUSR | S_IRUGO,
6413 fan_pwm1_show, fan_pwm1_store);
6414
6415 /* sysfs fan fan1_input ------------------------------------------------ */
6416 static ssize_t fan_fan1_input_show(struct device *dev,
6417 struct device_attribute *attr,
6418 char *buf)
6419 {
6420 int res;
6421 unsigned int speed;
6422
6423 res = fan_get_speed(&speed);
6424 if (res < 0)
6425 return res;
6426
6427 return snprintf(buf, PAGE_SIZE, "%u\n", speed);
6428 }
6429
6430 static struct device_attribute dev_attr_fan_fan1_input =
6431 __ATTR(fan1_input, S_IRUGO,
6432 fan_fan1_input_show, NULL);
6433
6434 /* sysfs fan fan_watchdog (hwmon driver) ------------------------------- */
6435 static ssize_t fan_fan_watchdog_show(struct device_driver *drv,
6436 char *buf)
6437 {
6438 return snprintf(buf, PAGE_SIZE, "%u\n", fan_watchdog_maxinterval);
6439 }
6440
6441 static ssize_t fan_fan_watchdog_store(struct device_driver *drv,
6442 const char *buf, size_t count)
6443 {
6444 unsigned long t;
6445
6446 if (parse_strtoul(buf, 120, &t))
6447 return -EINVAL;
6448
6449 if (!fan_control_allowed)
6450 return -EPERM;
6451
6452 fan_watchdog_maxinterval = t;
6453 fan_watchdog_reset();
6454
6455 return count;
6456 }
6457
6458 static DRIVER_ATTR(fan_watchdog, S_IWUSR | S_IRUGO,
6459 fan_fan_watchdog_show, fan_fan_watchdog_store);
6460
6461 /* --------------------------------------------------------------------- */
6462 static struct attribute *fan_attributes[] = {
6463 &dev_attr_fan_pwm1_enable.attr, &dev_attr_fan_pwm1.attr,
6464 &dev_attr_fan_fan1_input.attr,
6465 NULL
6466 };
6467
6468 static const struct attribute_group fan_attr_group = {
6469 .attrs = fan_attributes,
6470 };
6471
6472 static int __init fan_init(struct ibm_init_struct *iibm)
6473 {
6474 int rc;
6475
6476 vdbg_printk(TPACPI_DBG_INIT, "initializing fan subdriver\n");
6477
6478 mutex_init(&fan_mutex);
6479 fan_status_access_mode = TPACPI_FAN_NONE;
6480 fan_control_access_mode = TPACPI_FAN_WR_NONE;
6481 fan_control_commands = 0;
6482 fan_watchdog_maxinterval = 0;
6483 tp_features.fan_ctrl_status_undef = 0;
6484 fan_control_desired_level = 7;
6485
6486 TPACPI_ACPIHANDLE_INIT(fans);
6487 TPACPI_ACPIHANDLE_INIT(gfan);
6488 TPACPI_ACPIHANDLE_INIT(sfan);
6489
6490 if (gfan_handle) {
6491 /* 570, 600e/x, 770e, 770x */
6492 fan_status_access_mode = TPACPI_FAN_RD_ACPI_GFAN;
6493 } else {
6494 /* all other ThinkPads: note that even old-style
6495 * ThinkPad ECs supports the fan control register */
6496 if (likely(acpi_ec_read(fan_status_offset,
6497 &fan_control_initial_status))) {
6498 fan_status_access_mode = TPACPI_FAN_RD_TPEC;
6499 fan_quirk1_detect();
6500 } else {
6501 printk(TPACPI_ERR
6502 "ThinkPad ACPI EC access misbehaving, "
6503 "fan status and control unavailable\n");
6504 return 1;
6505 }
6506 }
6507
6508 if (sfan_handle) {
6509 /* 570, 770x-JL */
6510 fan_control_access_mode = TPACPI_FAN_WR_ACPI_SFAN;
6511 fan_control_commands |=
6512 TPACPI_FAN_CMD_LEVEL | TPACPI_FAN_CMD_ENABLE;
6513 } else {
6514 if (!gfan_handle) {
6515 /* gfan without sfan means no fan control */
6516 /* all other models implement TP EC 0x2f control */
6517
6518 if (fans_handle) {
6519 /* X31, X40, X41 */
6520 fan_control_access_mode =
6521 TPACPI_FAN_WR_ACPI_FANS;
6522 fan_control_commands |=
6523 TPACPI_FAN_CMD_SPEED |
6524 TPACPI_FAN_CMD_LEVEL |
6525 TPACPI_FAN_CMD_ENABLE;
6526 } else {
6527 fan_control_access_mode = TPACPI_FAN_WR_TPEC;
6528 fan_control_commands |=
6529 TPACPI_FAN_CMD_LEVEL |
6530 TPACPI_FAN_CMD_ENABLE;
6531 }
6532 }
6533 }
6534
6535 vdbg_printk(TPACPI_DBG_INIT, "fan is %s, modes %d, %d\n",
6536 str_supported(fan_status_access_mode != TPACPI_FAN_NONE ||
6537 fan_control_access_mode != TPACPI_FAN_WR_NONE),
6538 fan_status_access_mode, fan_control_access_mode);
6539
6540 /* fan control master switch */
6541 if (!fan_control_allowed) {
6542 fan_control_access_mode = TPACPI_FAN_WR_NONE;
6543 fan_control_commands = 0;
6544 dbg_printk(TPACPI_DBG_INIT,
6545 "fan control features disabled by parameter\n");
6546 }
6547
6548 /* update fan_control_desired_level */
6549 if (fan_status_access_mode != TPACPI_FAN_NONE)
6550 fan_get_status_safe(NULL);
6551
6552 if (fan_status_access_mode != TPACPI_FAN_NONE ||
6553 fan_control_access_mode != TPACPI_FAN_WR_NONE) {
6554 rc = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
6555 &fan_attr_group);
6556 if (rc < 0)
6557 return rc;
6558
6559 rc = driver_create_file(&tpacpi_hwmon_pdriver.driver,
6560 &driver_attr_fan_watchdog);
6561 if (rc < 0) {
6562 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
6563 &fan_attr_group);
6564 return rc;
6565 }
6566 return 0;
6567 } else
6568 return 1;
6569 }
6570
6571 static void fan_exit(void)
6572 {
6573 vdbg_printk(TPACPI_DBG_EXIT,
6574 "cancelling any pending fan watchdog tasks\n");
6575
6576 /* FIXME: can we really do this unconditionally? */
6577 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj, &fan_attr_group);
6578 driver_remove_file(&tpacpi_hwmon_pdriver.driver,
6579 &driver_attr_fan_watchdog);
6580
6581 cancel_delayed_work(&fan_watchdog_task);
6582 flush_workqueue(tpacpi_wq);
6583 }
6584
6585 static void fan_suspend(pm_message_t state)
6586 {
6587 int rc;
6588
6589 if (!fan_control_allowed)
6590 return;
6591
6592 /* Store fan status in cache */
6593 fan_control_resume_level = 0;
6594 rc = fan_get_status_safe(&fan_control_resume_level);
6595 if (rc < 0)
6596 printk(TPACPI_NOTICE
6597 "failed to read fan level for later "
6598 "restore during resume: %d\n", rc);
6599
6600 /* if it is undefined, don't attempt to restore it.
6601 * KEEP THIS LAST */
6602 if (tp_features.fan_ctrl_status_undef)
6603 fan_control_resume_level = 0;
6604 }
6605
6606 static void fan_resume(void)
6607 {
6608 u8 current_level = 7;
6609 bool do_set = false;
6610 int rc;
6611
6612 /* DSDT *always* updates status on resume */
6613 tp_features.fan_ctrl_status_undef = 0;
6614
6615 if (!fan_control_allowed ||
6616 !fan_control_resume_level ||
6617 (fan_get_status_safe(&current_level) < 0))
6618 return;
6619
6620 switch (fan_control_access_mode) {
6621 case TPACPI_FAN_WR_ACPI_SFAN:
6622 /* never decrease fan level */
6623 do_set = (fan_control_resume_level > current_level);
6624 break;
6625 case TPACPI_FAN_WR_ACPI_FANS:
6626 case TPACPI_FAN_WR_TPEC:
6627 /* never decrease fan level, scale is:
6628 * TP_EC_FAN_FULLSPEED > 7 >= TP_EC_FAN_AUTO
6629 *
6630 * We expect the firmware to set either 7 or AUTO, but we
6631 * handle FULLSPEED out of paranoia.
6632 *
6633 * So, we can safely only restore FULLSPEED or 7, anything
6634 * else could slow the fan. Restoring AUTO is useless, at
6635 * best that's exactly what the DSDT already set (it is the
6636 * slower it uses).
6637 *
6638 * Always keep in mind that the DSDT *will* have set the
6639 * fans to what the vendor supposes is the best level. We
6640 * muck with it only to speed the fan up.
6641 */
6642 if (fan_control_resume_level != 7 &&
6643 !(fan_control_resume_level & TP_EC_FAN_FULLSPEED))
6644 return;
6645 else
6646 do_set = !(current_level & TP_EC_FAN_FULLSPEED) &&
6647 (current_level != fan_control_resume_level);
6648 break;
6649 default:
6650 return;
6651 }
6652 if (do_set) {
6653 printk(TPACPI_NOTICE
6654 "restoring fan level to 0x%02x\n",
6655 fan_control_resume_level);
6656 rc = fan_set_level_safe(fan_control_resume_level);
6657 if (rc < 0)
6658 printk(TPACPI_NOTICE
6659 "failed to restore fan level: %d\n", rc);
6660 }
6661 }
6662
6663 static int fan_read(char *p)
6664 {
6665 int len = 0;
6666 int rc;
6667 u8 status;
6668 unsigned int speed = 0;
6669
6670 switch (fan_status_access_mode) {
6671 case TPACPI_FAN_RD_ACPI_GFAN:
6672 /* 570, 600e/x, 770e, 770x */
6673 rc = fan_get_status_safe(&status);
6674 if (rc < 0)
6675 return rc;
6676
6677 len += sprintf(p + len, "status:\t\t%s\n"
6678 "level:\t\t%d\n",
6679 (status != 0) ? "enabled" : "disabled", status);
6680 break;
6681
6682 case TPACPI_FAN_RD_TPEC:
6683 /* all except 570, 600e/x, 770e, 770x */
6684 rc = fan_get_status_safe(&status);
6685 if (rc < 0)
6686 return rc;
6687
6688 len += sprintf(p + len, "status:\t\t%s\n",
6689 (status != 0) ? "enabled" : "disabled");
6690
6691 rc = fan_get_speed(&speed);
6692 if (rc < 0)
6693 return rc;
6694
6695 len += sprintf(p + len, "speed:\t\t%d\n", speed);
6696
6697 if (status & TP_EC_FAN_FULLSPEED)
6698 /* Disengaged mode takes precedence */
6699 len += sprintf(p + len, "level:\t\tdisengaged\n");
6700 else if (status & TP_EC_FAN_AUTO)
6701 len += sprintf(p + len, "level:\t\tauto\n");
6702 else
6703 len += sprintf(p + len, "level:\t\t%d\n", status);
6704 break;
6705
6706 case TPACPI_FAN_NONE:
6707 default:
6708 len += sprintf(p + len, "status:\t\tnot supported\n");
6709 }
6710
6711 if (fan_control_commands & TPACPI_FAN_CMD_LEVEL) {
6712 len += sprintf(p + len, "commands:\tlevel <level>");
6713
6714 switch (fan_control_access_mode) {
6715 case TPACPI_FAN_WR_ACPI_SFAN:
6716 len += sprintf(p + len, " (<level> is 0-7)\n");
6717 break;
6718
6719 default:
6720 len += sprintf(p + len, " (<level> is 0-7, "
6721 "auto, disengaged, full-speed)\n");
6722 break;
6723 }
6724 }
6725
6726 if (fan_control_commands & TPACPI_FAN_CMD_ENABLE)
6727 len += sprintf(p + len, "commands:\tenable, disable\n"
6728 "commands:\twatchdog <timeout> (<timeout> "
6729 "is 0 (off), 1-120 (seconds))\n");
6730
6731 if (fan_control_commands & TPACPI_FAN_CMD_SPEED)
6732 len += sprintf(p + len, "commands:\tspeed <speed>"
6733 " (<speed> is 0-65535)\n");
6734
6735 return len;
6736 }
6737
6738 static int fan_write_cmd_level(const char *cmd, int *rc)
6739 {
6740 int level;
6741
6742 if (strlencmp(cmd, "level auto") == 0)
6743 level = TP_EC_FAN_AUTO;
6744 else if ((strlencmp(cmd, "level disengaged") == 0) |
6745 (strlencmp(cmd, "level full-speed") == 0))
6746 level = TP_EC_FAN_FULLSPEED;
6747 else if (sscanf(cmd, "level %d", &level) != 1)
6748 return 0;
6749
6750 *rc = fan_set_level_safe(level);
6751 if (*rc == -ENXIO)
6752 printk(TPACPI_ERR "level command accepted for unsupported "
6753 "access mode %d", fan_control_access_mode);
6754
6755 return 1;
6756 }
6757
6758 static int fan_write_cmd_enable(const char *cmd, int *rc)
6759 {
6760 if (strlencmp(cmd, "enable") != 0)
6761 return 0;
6762
6763 *rc = fan_set_enable();
6764 if (*rc == -ENXIO)
6765 printk(TPACPI_ERR "enable command accepted for unsupported "
6766 "access mode %d", fan_control_access_mode);
6767
6768 return 1;
6769 }
6770
6771 static int fan_write_cmd_disable(const char *cmd, int *rc)
6772 {
6773 if (strlencmp(cmd, "disable") != 0)
6774 return 0;
6775
6776 *rc = fan_set_disable();
6777 if (*rc == -ENXIO)
6778 printk(TPACPI_ERR "disable command accepted for unsupported "
6779 "access mode %d", fan_control_access_mode);
6780
6781 return 1;
6782 }
6783
6784 static int fan_write_cmd_speed(const char *cmd, int *rc)
6785 {
6786 int speed;
6787
6788 /* TODO:
6789 * Support speed <low> <medium> <high> ? */
6790
6791 if (sscanf(cmd, "speed %d", &speed) != 1)
6792 return 0;
6793
6794 *rc = fan_set_speed(speed);
6795 if (*rc == -ENXIO)
6796 printk(TPACPI_ERR "speed command accepted for unsupported "
6797 "access mode %d", fan_control_access_mode);
6798
6799 return 1;
6800 }
6801
6802 static int fan_write_cmd_watchdog(const char *cmd, int *rc)
6803 {
6804 int interval;
6805
6806 if (sscanf(cmd, "watchdog %d", &interval) != 1)
6807 return 0;
6808
6809 if (interval < 0 || interval > 120)
6810 *rc = -EINVAL;
6811 else
6812 fan_watchdog_maxinterval = interval;
6813
6814 return 1;
6815 }
6816
6817 static int fan_write(char *buf)
6818 {
6819 char *cmd;
6820 int rc = 0;
6821
6822 while (!rc && (cmd = next_cmd(&buf))) {
6823 if (!((fan_control_commands & TPACPI_FAN_CMD_LEVEL) &&
6824 fan_write_cmd_level(cmd, &rc)) &&
6825 !((fan_control_commands & TPACPI_FAN_CMD_ENABLE) &&
6826 (fan_write_cmd_enable(cmd, &rc) ||
6827 fan_write_cmd_disable(cmd, &rc) ||
6828 fan_write_cmd_watchdog(cmd, &rc))) &&
6829 !((fan_control_commands & TPACPI_FAN_CMD_SPEED) &&
6830 fan_write_cmd_speed(cmd, &rc))
6831 )
6832 rc = -EINVAL;
6833 else if (!rc)
6834 fan_watchdog_reset();
6835 }
6836
6837 return rc;
6838 }
6839
6840 static struct ibm_struct fan_driver_data = {
6841 .name = "fan",
6842 .read = fan_read,
6843 .write = fan_write,
6844 .exit = fan_exit,
6845 .suspend = fan_suspend,
6846 .resume = fan_resume,
6847 };
6848
6849 /****************************************************************************
6850 ****************************************************************************
6851 *
6852 * Infrastructure
6853 *
6854 ****************************************************************************
6855 ****************************************************************************/
6856
6857 /* sysfs name ---------------------------------------------------------- */
6858 static ssize_t thinkpad_acpi_pdev_name_show(struct device *dev,
6859 struct device_attribute *attr,
6860 char *buf)
6861 {
6862 return snprintf(buf, PAGE_SIZE, "%s\n", TPACPI_NAME);
6863 }
6864
6865 static struct device_attribute dev_attr_thinkpad_acpi_pdev_name =
6866 __ATTR(name, S_IRUGO, thinkpad_acpi_pdev_name_show, NULL);
6867
6868 /* --------------------------------------------------------------------- */
6869
6870 /* /proc support */
6871 static struct proc_dir_entry *proc_dir;
6872
6873 /*
6874 * Module and infrastructure proble, init and exit handling
6875 */
6876
6877 static int force_load;
6878
6879 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
6880 static const char * __init str_supported(int is_supported)
6881 {
6882 static char text_unsupported[] __initdata = "not supported";
6883
6884 return (is_supported)? &text_unsupported[4] : &text_unsupported[0];
6885 }
6886 #endif /* CONFIG_THINKPAD_ACPI_DEBUG */
6887
6888 static void ibm_exit(struct ibm_struct *ibm)
6889 {
6890 dbg_printk(TPACPI_DBG_EXIT, "removing %s\n", ibm->name);
6891
6892 list_del_init(&ibm->all_drivers);
6893
6894 if (ibm->flags.acpi_notify_installed) {
6895 dbg_printk(TPACPI_DBG_EXIT,
6896 "%s: acpi_remove_notify_handler\n", ibm->name);
6897 BUG_ON(!ibm->acpi);
6898 acpi_remove_notify_handler(*ibm->acpi->handle,
6899 ibm->acpi->type,
6900 dispatch_acpi_notify);
6901 ibm->flags.acpi_notify_installed = 0;
6902 ibm->flags.acpi_notify_installed = 0;
6903 }
6904
6905 if (ibm->flags.proc_created) {
6906 dbg_printk(TPACPI_DBG_EXIT,
6907 "%s: remove_proc_entry\n", ibm->name);
6908 remove_proc_entry(ibm->name, proc_dir);
6909 ibm->flags.proc_created = 0;
6910 }
6911
6912 if (ibm->flags.acpi_driver_registered) {
6913 dbg_printk(TPACPI_DBG_EXIT,
6914 "%s: acpi_bus_unregister_driver\n", ibm->name);
6915 BUG_ON(!ibm->acpi);
6916 acpi_bus_unregister_driver(ibm->acpi->driver);
6917 kfree(ibm->acpi->driver);
6918 ibm->acpi->driver = NULL;
6919 ibm->flags.acpi_driver_registered = 0;
6920 }
6921
6922 if (ibm->flags.init_called && ibm->exit) {
6923 ibm->exit();
6924 ibm->flags.init_called = 0;
6925 }
6926
6927 dbg_printk(TPACPI_DBG_INIT, "finished removing %s\n", ibm->name);
6928 }
6929
6930 static int __init ibm_init(struct ibm_init_struct *iibm)
6931 {
6932 int ret;
6933 struct ibm_struct *ibm = iibm->data;
6934 struct proc_dir_entry *entry;
6935
6936 BUG_ON(ibm == NULL);
6937
6938 INIT_LIST_HEAD(&ibm->all_drivers);
6939
6940 if (ibm->flags.experimental && !experimental)
6941 return 0;
6942
6943 dbg_printk(TPACPI_DBG_INIT,
6944 "probing for %s\n", ibm->name);
6945
6946 if (iibm->init) {
6947 ret = iibm->init(iibm);
6948 if (ret > 0)
6949 return 0; /* probe failed */
6950 if (ret)
6951 return ret;
6952
6953 ibm->flags.init_called = 1;
6954 }
6955
6956 if (ibm->acpi) {
6957 if (ibm->acpi->hid) {
6958 ret = register_tpacpi_subdriver(ibm);
6959 if (ret)
6960 goto err_out;
6961 }
6962
6963 if (ibm->acpi->notify) {
6964 ret = setup_acpi_notify(ibm);
6965 if (ret == -ENODEV) {
6966 printk(TPACPI_NOTICE "disabling subdriver %s\n",
6967 ibm->name);
6968 ret = 0;
6969 goto err_out;
6970 }
6971 if (ret < 0)
6972 goto err_out;
6973 }
6974 }
6975
6976 dbg_printk(TPACPI_DBG_INIT,
6977 "%s installed\n", ibm->name);
6978
6979 if (ibm->read) {
6980 entry = create_proc_entry(ibm->name,
6981 S_IFREG | S_IRUGO | S_IWUSR,
6982 proc_dir);
6983 if (!entry) {
6984 printk(TPACPI_ERR "unable to create proc entry %s\n",
6985 ibm->name);
6986 ret = -ENODEV;
6987 goto err_out;
6988 }
6989 entry->owner = THIS_MODULE;
6990 entry->data = ibm;
6991 entry->read_proc = &dispatch_procfs_read;
6992 if (ibm->write)
6993 entry->write_proc = &dispatch_procfs_write;
6994 ibm->flags.proc_created = 1;
6995 }
6996
6997 list_add_tail(&ibm->all_drivers, &tpacpi_all_drivers);
6998
6999 return 0;
7000
7001 err_out:
7002 dbg_printk(TPACPI_DBG_INIT,
7003 "%s: at error exit path with result %d\n",
7004 ibm->name, ret);
7005
7006 ibm_exit(ibm);
7007 return (ret < 0)? ret : 0;
7008 }
7009
7010 /* Probing */
7011
7012 /* returns 0 - probe ok, or < 0 - probe error.
7013 * Probe ok doesn't mean thinkpad found.
7014 * On error, kfree() cleanup on tp->* is not performed, caller must do it */
7015 static int __must_check __init get_thinkpad_model_data(
7016 struct thinkpad_id_data *tp)
7017 {
7018 const struct dmi_device *dev = NULL;
7019 char ec_fw_string[18];
7020 char const *s;
7021
7022 if (!tp)
7023 return -EINVAL;
7024
7025 memset(tp, 0, sizeof(*tp));
7026
7027 if (dmi_name_in_vendors("IBM"))
7028 tp->vendor = PCI_VENDOR_ID_IBM;
7029 else if (dmi_name_in_vendors("LENOVO"))
7030 tp->vendor = PCI_VENDOR_ID_LENOVO;
7031 else
7032 return 0;
7033
7034 s = dmi_get_system_info(DMI_BIOS_VERSION);
7035 tp->bios_version_str = kstrdup(s, GFP_KERNEL);
7036 if (s && !tp->bios_version_str)
7037 return -ENOMEM;
7038 if (!tp->bios_version_str)
7039 return 0;
7040 tp->bios_model = tp->bios_version_str[0]
7041 | (tp->bios_version_str[1] << 8);
7042
7043 /*
7044 * ThinkPad T23 or newer, A31 or newer, R50e or newer,
7045 * X32 or newer, all Z series; Some models must have an
7046 * up-to-date BIOS or they will not be detected.
7047 *
7048 * See http://thinkwiki.org/wiki/List_of_DMI_IDs
7049 */
7050 while ((dev = dmi_find_device(DMI_DEV_TYPE_OEM_STRING, NULL, dev))) {
7051 if (sscanf(dev->name,
7052 "IBM ThinkPad Embedded Controller -[%17c",
7053 ec_fw_string) == 1) {
7054 ec_fw_string[sizeof(ec_fw_string) - 1] = 0;
7055 ec_fw_string[strcspn(ec_fw_string, " ]")] = 0;
7056
7057 tp->ec_version_str = kstrdup(ec_fw_string, GFP_KERNEL);
7058 if (!tp->ec_version_str)
7059 return -ENOMEM;
7060 tp->ec_model = ec_fw_string[0]
7061 | (ec_fw_string[1] << 8);
7062 break;
7063 }
7064 }
7065
7066 s = dmi_get_system_info(DMI_PRODUCT_VERSION);
7067 if (s && !strnicmp(s, "ThinkPad", 8)) {
7068 tp->model_str = kstrdup(s, GFP_KERNEL);
7069 if (!tp->model_str)
7070 return -ENOMEM;
7071 }
7072
7073 s = dmi_get_system_info(DMI_PRODUCT_NAME);
7074 tp->nummodel_str = kstrdup(s, GFP_KERNEL);
7075 if (s && !tp->nummodel_str)
7076 return -ENOMEM;
7077
7078 return 0;
7079 }
7080
7081 static int __init probe_for_thinkpad(void)
7082 {
7083 int is_thinkpad;
7084
7085 if (acpi_disabled)
7086 return -ENODEV;
7087
7088 /*
7089 * Non-ancient models have better DMI tagging, but very old models
7090 * don't.
7091 */
7092 is_thinkpad = (thinkpad_id.model_str != NULL);
7093
7094 /* ec is required because many other handles are relative to it */
7095 TPACPI_ACPIHANDLE_INIT(ec);
7096 if (!ec_handle) {
7097 if (is_thinkpad)
7098 printk(TPACPI_ERR
7099 "Not yet supported ThinkPad detected!\n");
7100 return -ENODEV;
7101 }
7102
7103 /*
7104 * Risks a regression on very old machines, but reduces potential
7105 * false positives a damn great deal
7106 */
7107 if (!is_thinkpad)
7108 is_thinkpad = (thinkpad_id.vendor == PCI_VENDOR_ID_IBM);
7109
7110 if (!is_thinkpad && !force_load)
7111 return -ENODEV;
7112
7113 return 0;
7114 }
7115
7116
7117 /* Module init, exit, parameters */
7118
7119 static struct ibm_init_struct ibms_init[] __initdata = {
7120 {
7121 .init = thinkpad_acpi_driver_init,
7122 .data = &thinkpad_acpi_driver_data,
7123 },
7124 {
7125 .init = hotkey_init,
7126 .data = &hotkey_driver_data,
7127 },
7128 {
7129 .init = bluetooth_init,
7130 .data = &bluetooth_driver_data,
7131 },
7132 {
7133 .init = wan_init,
7134 .data = &wan_driver_data,
7135 },
7136 {
7137 .init = uwb_init,
7138 .data = &uwb_driver_data,
7139 },
7140 #ifdef CONFIG_THINKPAD_ACPI_VIDEO
7141 {
7142 .init = video_init,
7143 .data = &video_driver_data,
7144 },
7145 #endif
7146 {
7147 .init = light_init,
7148 .data = &light_driver_data,
7149 },
7150 #ifdef CONFIG_THINKPAD_ACPI_DOCK
7151 {
7152 .init = dock_init,
7153 .data = &dock_driver_data[0],
7154 },
7155 {
7156 .init = dock_init2,
7157 .data = &dock_driver_data[1],
7158 },
7159 #endif
7160 #ifdef CONFIG_THINKPAD_ACPI_BAY
7161 {
7162 .init = bay_init,
7163 .data = &bay_driver_data,
7164 },
7165 #endif
7166 {
7167 .init = cmos_init,
7168 .data = &cmos_driver_data,
7169 },
7170 {
7171 .init = led_init,
7172 .data = &led_driver_data,
7173 },
7174 {
7175 .init = beep_init,
7176 .data = &beep_driver_data,
7177 },
7178 {
7179 .init = thermal_init,
7180 .data = &thermal_driver_data,
7181 },
7182 {
7183 .data = &ecdump_driver_data,
7184 },
7185 {
7186 .init = brightness_init,
7187 .data = &brightness_driver_data,
7188 },
7189 {
7190 .data = &volume_driver_data,
7191 },
7192 {
7193 .init = fan_init,
7194 .data = &fan_driver_data,
7195 },
7196 };
7197
7198 static int __init set_ibm_param(const char *val, struct kernel_param *kp)
7199 {
7200 unsigned int i;
7201 struct ibm_struct *ibm;
7202
7203 if (!kp || !kp->name || !val)
7204 return -EINVAL;
7205
7206 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
7207 ibm = ibms_init[i].data;
7208 WARN_ON(ibm == NULL);
7209
7210 if (!ibm || !ibm->name)
7211 continue;
7212
7213 if (strcmp(ibm->name, kp->name) == 0 && ibm->write) {
7214 if (strlen(val) > sizeof(ibms_init[i].param) - 2)
7215 return -ENOSPC;
7216 strcpy(ibms_init[i].param, val);
7217 strcat(ibms_init[i].param, ",");
7218 return 0;
7219 }
7220 }
7221
7222 return -EINVAL;
7223 }
7224
7225 module_param(experimental, int, 0);
7226 MODULE_PARM_DESC(experimental,
7227 "Enables experimental features when non-zero");
7228
7229 module_param_named(debug, dbg_level, uint, 0);
7230 MODULE_PARM_DESC(debug, "Sets debug level bit-mask");
7231
7232 module_param(force_load, bool, 0);
7233 MODULE_PARM_DESC(force_load,
7234 "Attempts to load the driver even on a "
7235 "mis-identified ThinkPad when true");
7236
7237 module_param_named(fan_control, fan_control_allowed, bool, 0);
7238 MODULE_PARM_DESC(fan_control,
7239 "Enables setting fan parameters features when true");
7240
7241 module_param_named(brightness_mode, brightness_mode, int, 0);
7242 MODULE_PARM_DESC(brightness_mode,
7243 "Selects brightness control strategy: "
7244 "0=auto, 1=EC, 2=CMOS, 3=both");
7245
7246 module_param(brightness_enable, uint, 0);
7247 MODULE_PARM_DESC(brightness_enable,
7248 "Enables backlight control when 1, disables when 0");
7249
7250 module_param(hotkey_report_mode, uint, 0);
7251 MODULE_PARM_DESC(hotkey_report_mode,
7252 "used for backwards compatibility with userspace, "
7253 "see documentation");
7254
7255 #define TPACPI_PARAM(feature) \
7256 module_param_call(feature, set_ibm_param, NULL, NULL, 0); \
7257 MODULE_PARM_DESC(feature, "Simulates thinkpad-acpi procfs command " \
7258 "at module load, see documentation")
7259
7260 TPACPI_PARAM(hotkey);
7261 TPACPI_PARAM(bluetooth);
7262 TPACPI_PARAM(video);
7263 TPACPI_PARAM(light);
7264 #ifdef CONFIG_THINKPAD_ACPI_DOCK
7265 TPACPI_PARAM(dock);
7266 #endif
7267 #ifdef CONFIG_THINKPAD_ACPI_BAY
7268 TPACPI_PARAM(bay);
7269 #endif /* CONFIG_THINKPAD_ACPI_BAY */
7270 TPACPI_PARAM(cmos);
7271 TPACPI_PARAM(led);
7272 TPACPI_PARAM(beep);
7273 TPACPI_PARAM(ecdump);
7274 TPACPI_PARAM(brightness);
7275 TPACPI_PARAM(volume);
7276 TPACPI_PARAM(fan);
7277
7278 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
7279 module_param(dbg_wlswemul, uint, 0);
7280 MODULE_PARM_DESC(dbg_wlswemul, "Enables WLSW emulation");
7281 module_param_named(wlsw_state, tpacpi_wlsw_emulstate, bool, 0);
7282 MODULE_PARM_DESC(wlsw_state,
7283 "Initial state of the emulated WLSW switch");
7284
7285 module_param(dbg_bluetoothemul, uint, 0);
7286 MODULE_PARM_DESC(dbg_bluetoothemul, "Enables bluetooth switch emulation");
7287 module_param_named(bluetooth_state, tpacpi_bluetooth_emulstate, bool, 0);
7288 MODULE_PARM_DESC(bluetooth_state,
7289 "Initial state of the emulated bluetooth switch");
7290
7291 module_param(dbg_wwanemul, uint, 0);
7292 MODULE_PARM_DESC(dbg_wwanemul, "Enables WWAN switch emulation");
7293 module_param_named(wwan_state, tpacpi_wwan_emulstate, bool, 0);
7294 MODULE_PARM_DESC(wwan_state,
7295 "Initial state of the emulated WWAN switch");
7296
7297 module_param(dbg_uwbemul, uint, 0);
7298 MODULE_PARM_DESC(dbg_uwbemul, "Enables UWB switch emulation");
7299 module_param_named(uwb_state, tpacpi_uwb_emulstate, bool, 0);
7300 MODULE_PARM_DESC(uwb_state,
7301 "Initial state of the emulated UWB switch");
7302 #endif
7303
7304 static void thinkpad_acpi_module_exit(void)
7305 {
7306 struct ibm_struct *ibm, *itmp;
7307
7308 tpacpi_lifecycle = TPACPI_LIFE_EXITING;
7309
7310 list_for_each_entry_safe_reverse(ibm, itmp,
7311 &tpacpi_all_drivers,
7312 all_drivers) {
7313 ibm_exit(ibm);
7314 }
7315
7316 dbg_printk(TPACPI_DBG_INIT, "finished subdriver exit path...\n");
7317
7318 if (tpacpi_inputdev) {
7319 if (tp_features.input_device_registered)
7320 input_unregister_device(tpacpi_inputdev);
7321 else
7322 input_free_device(tpacpi_inputdev);
7323 }
7324
7325 if (tpacpi_hwmon)
7326 hwmon_device_unregister(tpacpi_hwmon);
7327
7328 if (tp_features.sensors_pdev_attrs_registered)
7329 device_remove_file(&tpacpi_sensors_pdev->dev,
7330 &dev_attr_thinkpad_acpi_pdev_name);
7331 if (tpacpi_sensors_pdev)
7332 platform_device_unregister(tpacpi_sensors_pdev);
7333 if (tpacpi_pdev)
7334 platform_device_unregister(tpacpi_pdev);
7335
7336 if (tp_features.sensors_pdrv_attrs_registered)
7337 tpacpi_remove_driver_attributes(&tpacpi_hwmon_pdriver.driver);
7338 if (tp_features.platform_drv_attrs_registered)
7339 tpacpi_remove_driver_attributes(&tpacpi_pdriver.driver);
7340
7341 if (tp_features.sensors_pdrv_registered)
7342 platform_driver_unregister(&tpacpi_hwmon_pdriver);
7343
7344 if (tp_features.platform_drv_registered)
7345 platform_driver_unregister(&tpacpi_pdriver);
7346
7347 if (proc_dir)
7348 remove_proc_entry(TPACPI_PROC_DIR, acpi_root_dir);
7349
7350 if (tpacpi_wq)
7351 destroy_workqueue(tpacpi_wq);
7352
7353 kfree(thinkpad_id.bios_version_str);
7354 kfree(thinkpad_id.ec_version_str);
7355 kfree(thinkpad_id.model_str);
7356 }
7357
7358
7359 static int __init thinkpad_acpi_module_init(void)
7360 {
7361 int ret, i;
7362
7363 tpacpi_lifecycle = TPACPI_LIFE_INIT;
7364
7365 /* Parameter checking */
7366 if (hotkey_report_mode > 2)
7367 return -EINVAL;
7368
7369 /* Driver-level probe */
7370
7371 ret = get_thinkpad_model_data(&thinkpad_id);
7372 if (ret) {
7373 printk(TPACPI_ERR
7374 "unable to get DMI data: %d\n", ret);
7375 thinkpad_acpi_module_exit();
7376 return ret;
7377 }
7378 ret = probe_for_thinkpad();
7379 if (ret) {
7380 thinkpad_acpi_module_exit();
7381 return ret;
7382 }
7383
7384 /* Driver initialization */
7385
7386 TPACPI_ACPIHANDLE_INIT(ecrd);
7387 TPACPI_ACPIHANDLE_INIT(ecwr);
7388
7389 tpacpi_wq = create_singlethread_workqueue(TPACPI_WORKQUEUE_NAME);
7390 if (!tpacpi_wq) {
7391 thinkpad_acpi_module_exit();
7392 return -ENOMEM;
7393 }
7394
7395 proc_dir = proc_mkdir(TPACPI_PROC_DIR, acpi_root_dir);
7396 if (!proc_dir) {
7397 printk(TPACPI_ERR
7398 "unable to create proc dir " TPACPI_PROC_DIR);
7399 thinkpad_acpi_module_exit();
7400 return -ENODEV;
7401 }
7402 proc_dir->owner = THIS_MODULE;
7403
7404 ret = platform_driver_register(&tpacpi_pdriver);
7405 if (ret) {
7406 printk(TPACPI_ERR
7407 "unable to register main platform driver\n");
7408 thinkpad_acpi_module_exit();
7409 return ret;
7410 }
7411 tp_features.platform_drv_registered = 1;
7412
7413 ret = platform_driver_register(&tpacpi_hwmon_pdriver);
7414 if (ret) {
7415 printk(TPACPI_ERR
7416 "unable to register hwmon platform driver\n");
7417 thinkpad_acpi_module_exit();
7418 return ret;
7419 }
7420 tp_features.sensors_pdrv_registered = 1;
7421
7422 ret = tpacpi_create_driver_attributes(&tpacpi_pdriver.driver);
7423 if (!ret) {
7424 tp_features.platform_drv_attrs_registered = 1;
7425 ret = tpacpi_create_driver_attributes(
7426 &tpacpi_hwmon_pdriver.driver);
7427 }
7428 if (ret) {
7429 printk(TPACPI_ERR
7430 "unable to create sysfs driver attributes\n");
7431 thinkpad_acpi_module_exit();
7432 return ret;
7433 }
7434 tp_features.sensors_pdrv_attrs_registered = 1;
7435
7436
7437 /* Device initialization */
7438 tpacpi_pdev = platform_device_register_simple(TPACPI_DRVR_NAME, -1,
7439 NULL, 0);
7440 if (IS_ERR(tpacpi_pdev)) {
7441 ret = PTR_ERR(tpacpi_pdev);
7442 tpacpi_pdev = NULL;
7443 printk(TPACPI_ERR "unable to register platform device\n");
7444 thinkpad_acpi_module_exit();
7445 return ret;
7446 }
7447 tpacpi_sensors_pdev = platform_device_register_simple(
7448 TPACPI_HWMON_DRVR_NAME,
7449 -1, NULL, 0);
7450 if (IS_ERR(tpacpi_sensors_pdev)) {
7451 ret = PTR_ERR(tpacpi_sensors_pdev);
7452 tpacpi_sensors_pdev = NULL;
7453 printk(TPACPI_ERR
7454 "unable to register hwmon platform device\n");
7455 thinkpad_acpi_module_exit();
7456 return ret;
7457 }
7458 ret = device_create_file(&tpacpi_sensors_pdev->dev,
7459 &dev_attr_thinkpad_acpi_pdev_name);
7460 if (ret) {
7461 printk(TPACPI_ERR
7462 "unable to create sysfs hwmon device attributes\n");
7463 thinkpad_acpi_module_exit();
7464 return ret;
7465 }
7466 tp_features.sensors_pdev_attrs_registered = 1;
7467 tpacpi_hwmon = hwmon_device_register(&tpacpi_sensors_pdev->dev);
7468 if (IS_ERR(tpacpi_hwmon)) {
7469 ret = PTR_ERR(tpacpi_hwmon);
7470 tpacpi_hwmon = NULL;
7471 printk(TPACPI_ERR "unable to register hwmon device\n");
7472 thinkpad_acpi_module_exit();
7473 return ret;
7474 }
7475 mutex_init(&tpacpi_inputdev_send_mutex);
7476 tpacpi_inputdev = input_allocate_device();
7477 if (!tpacpi_inputdev) {
7478 printk(TPACPI_ERR "unable to allocate input device\n");
7479 thinkpad_acpi_module_exit();
7480 return -ENOMEM;
7481 } else {
7482 /* Prepare input device, but don't register */
7483 tpacpi_inputdev->name = "ThinkPad Extra Buttons";
7484 tpacpi_inputdev->phys = TPACPI_DRVR_NAME "/input0";
7485 tpacpi_inputdev->id.bustype = BUS_HOST;
7486 tpacpi_inputdev->id.vendor = (thinkpad_id.vendor) ?
7487 thinkpad_id.vendor :
7488 PCI_VENDOR_ID_IBM;
7489 tpacpi_inputdev->id.product = TPACPI_HKEY_INPUT_PRODUCT;
7490 tpacpi_inputdev->id.version = TPACPI_HKEY_INPUT_VERSION;
7491 }
7492 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
7493 ret = ibm_init(&ibms_init[i]);
7494 if (ret >= 0 && *ibms_init[i].param)
7495 ret = ibms_init[i].data->write(ibms_init[i].param);
7496 if (ret < 0) {
7497 thinkpad_acpi_module_exit();
7498 return ret;
7499 }
7500 }
7501 ret = input_register_device(tpacpi_inputdev);
7502 if (ret < 0) {
7503 printk(TPACPI_ERR "unable to register input device\n");
7504 thinkpad_acpi_module_exit();
7505 return ret;
7506 } else {
7507 tp_features.input_device_registered = 1;
7508 }
7509
7510 tpacpi_lifecycle = TPACPI_LIFE_RUNNING;
7511 return 0;
7512 }
7513
7514 /* Please remove this in year 2009 */
7515 MODULE_ALIAS("ibm_acpi");
7516
7517 MODULE_ALIAS(TPACPI_DRVR_SHORTNAME);
7518
7519 /*
7520 * DMI matching for module autoloading
7521 *
7522 * See http://thinkwiki.org/wiki/List_of_DMI_IDs
7523 * See http://thinkwiki.org/wiki/BIOS_Upgrade_Downloads
7524 *
7525 * Only models listed in thinkwiki will be supported, so add yours
7526 * if it is not there yet.
7527 */
7528 #define IBM_BIOS_MODULE_ALIAS(__type) \
7529 MODULE_ALIAS("dmi:bvnIBM:bvr" __type "ET??WW")
7530
7531 /* Non-ancient thinkpads */
7532 MODULE_ALIAS("dmi:bvnIBM:*:svnIBM:*:pvrThinkPad*:rvnIBM:*");
7533 MODULE_ALIAS("dmi:bvnLENOVO:*:svnLENOVO:*:pvrThinkPad*:rvnLENOVO:*");
7534
7535 /* Ancient thinkpad BIOSes have to be identified by
7536 * BIOS type or model number, and there are far less
7537 * BIOS types than model numbers... */
7538 IBM_BIOS_MODULE_ALIAS("I[B,D,H,I,M,N,O,T,W,V,Y,Z]");
7539 IBM_BIOS_MODULE_ALIAS("1[0,3,6,8,A-G,I,K,M-P,S,T]");
7540 IBM_BIOS_MODULE_ALIAS("K[U,X-Z]");
7541
7542 MODULE_AUTHOR("Borislav Deianov, Henrique de Moraes Holschuh");
7543 MODULE_DESCRIPTION(TPACPI_DESC);
7544 MODULE_VERSION(TPACPI_VERSION);
7545 MODULE_LICENSE("GPL");
7546
7547 module_init(thinkpad_acpi_module_init);
7548 module_exit(thinkpad_acpi_module_exit);
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree