thinkpad_acpi: fix rfkill memory leak on unload
[linux-2.6.git] / drivers / platform / x86 / thinkpad_acpi.c
1 /*
2  *  thinkpad_acpi.c - ThinkPad ACPI Extras
3  *
4  *
5  *  Copyright (C) 2004-2005 Borislav Deianov <borislav@users.sf.net>
6  *  Copyright (C) 2006-2009 Henrique de Moraes Holschuh <hmh@hmh.eng.br>
7  *
8  *  This program is free software; you can redistribute it and/or modify
9  *  it under the terms of the GNU General Public License as published by
10  *  the Free Software Foundation; either version 2 of the License, or
11  *  (at your option) any later version.
12  *
13  *  This program is distributed in the hope that it will be useful,
14  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
15  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
16  *  GNU General Public License for more details.
17  *
18  *  You should have received a copy of the GNU General Public License
19  *  along with this program; if not, write to the Free Software
20  *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
21  *  02110-1301, USA.
22  */
23
24 #define TPACPI_VERSION "0.23"
25 #define TPACPI_SYSFS_VERSION 0x020400
26
27 /*
28  *  Changelog:
29  *  2007-10-20          changelog trimmed down
30  *
31  *  2007-03-27  0.14    renamed to thinkpad_acpi and moved to
32  *                      drivers/misc.
33  *
34  *  2006-11-22  0.13    new maintainer
35  *                      changelog now lives in git commit history, and will
36  *                      not be updated further in-file.
37  *
38  *  2005-03-17  0.11    support for 600e, 770x
39  *                          thanks to Jamie Lentin <lentinj@dial.pipex.com>
40  *
41  *  2005-01-16  0.9     use MODULE_VERSION
42  *                          thanks to Henrik Brix Andersen <brix@gentoo.org>
43  *                      fix parameter passing on module loading
44  *                          thanks to Rusty Russell <rusty@rustcorp.com.au>
45  *                          thanks to Jim Radford <radford@blackbean.org>
46  *  2004-11-08  0.8     fix init error case, don't return from a macro
47  *                          thanks to Chris Wright <chrisw@osdl.org>
48  */
49
50 #include <linux/kernel.h>
51 #include <linux/module.h>
52 #include <linux/init.h>
53 #include <linux/types.h>
54 #include <linux/string.h>
55 #include <linux/list.h>
56 #include <linux/mutex.h>
57 #include <linux/sched.h>
58 #include <linux/kthread.h>
59 #include <linux/freezer.h>
60 #include <linux/delay.h>
61
62 #include <linux/nvram.h>
63 #include <linux/proc_fs.h>
64 #include <linux/sysfs.h>
65 #include <linux/backlight.h>
66 #include <linux/fb.h>
67 #include <linux/platform_device.h>
68 #include <linux/hwmon.h>
69 #include <linux/hwmon-sysfs.h>
70 #include <linux/input.h>
71 #include <linux/leds.h>
72 #include <linux/rfkill.h>
73 #include <asm/uaccess.h>
74
75 #include <linux/dmi.h>
76 #include <linux/jiffies.h>
77 #include <linux/workqueue.h>
78
79 #include <acpi/acpi_drivers.h>
80
81 #include <linux/pci_ids.h>
82
83
84 /* ThinkPad CMOS commands */
85 #define TP_CMOS_VOLUME_DOWN     0
86 #define TP_CMOS_VOLUME_UP       1
87 #define TP_CMOS_VOLUME_MUTE     2
88 #define TP_CMOS_BRIGHTNESS_UP   4
89 #define TP_CMOS_BRIGHTNESS_DOWN 5
90 #define TP_CMOS_THINKLIGHT_ON   12
91 #define TP_CMOS_THINKLIGHT_OFF  13
92
93 /* NVRAM Addresses */
94 enum tp_nvram_addr {
95         TP_NVRAM_ADDR_HK2               = 0x57,
96         TP_NVRAM_ADDR_THINKLIGHT        = 0x58,
97         TP_NVRAM_ADDR_VIDEO             = 0x59,
98         TP_NVRAM_ADDR_BRIGHTNESS        = 0x5e,
99         TP_NVRAM_ADDR_MIXER             = 0x60,
100 };
101
102 /* NVRAM bit masks */
103 enum {
104         TP_NVRAM_MASK_HKT_THINKPAD      = 0x08,
105         TP_NVRAM_MASK_HKT_ZOOM          = 0x20,
106         TP_NVRAM_MASK_HKT_DISPLAY       = 0x40,
107         TP_NVRAM_MASK_HKT_HIBERNATE     = 0x80,
108         TP_NVRAM_MASK_THINKLIGHT        = 0x10,
109         TP_NVRAM_MASK_HKT_DISPEXPND     = 0x30,
110         TP_NVRAM_MASK_HKT_BRIGHTNESS    = 0x20,
111         TP_NVRAM_MASK_LEVEL_BRIGHTNESS  = 0x0f,
112         TP_NVRAM_POS_LEVEL_BRIGHTNESS   = 0,
113         TP_NVRAM_MASK_MUTE              = 0x40,
114         TP_NVRAM_MASK_HKT_VOLUME        = 0x80,
115         TP_NVRAM_MASK_LEVEL_VOLUME      = 0x0f,
116         TP_NVRAM_POS_LEVEL_VOLUME       = 0,
117 };
118
119 /* ACPI HIDs */
120 #define TPACPI_ACPI_HKEY_HID            "IBM0068"
121
122 /* Input IDs */
123 #define TPACPI_HKEY_INPUT_PRODUCT       0x5054 /* "TP" */
124 #define TPACPI_HKEY_INPUT_VERSION       0x4101
125
126 /* ACPI \WGSV commands */
127 enum {
128         TP_ACPI_WGSV_GET_STATE          = 0x01, /* Get state information */
129         TP_ACPI_WGSV_PWR_ON_ON_RESUME   = 0x02, /* Resume WWAN powered on */
130         TP_ACPI_WGSV_PWR_OFF_ON_RESUME  = 0x03, /* Resume WWAN powered off */
131         TP_ACPI_WGSV_SAVE_STATE         = 0x04, /* Save state for S4/S5 */
132 };
133
134 /* TP_ACPI_WGSV_GET_STATE bits */
135 enum {
136         TP_ACPI_WGSV_STATE_WWANEXIST    = 0x0001, /* WWAN hw available */
137         TP_ACPI_WGSV_STATE_WWANPWR      = 0x0002, /* WWAN radio enabled */
138         TP_ACPI_WGSV_STATE_WWANPWRRES   = 0x0004, /* WWAN state at resume */
139         TP_ACPI_WGSV_STATE_WWANBIOSOFF  = 0x0008, /* WWAN disabled in BIOS */
140         TP_ACPI_WGSV_STATE_BLTHEXIST    = 0x0001, /* BLTH hw available */
141         TP_ACPI_WGSV_STATE_BLTHPWR      = 0x0002, /* BLTH radio enabled */
142         TP_ACPI_WGSV_STATE_BLTHPWRRES   = 0x0004, /* BLTH state at resume */
143         TP_ACPI_WGSV_STATE_BLTHBIOSOFF  = 0x0008, /* BLTH disabled in BIOS */
144         TP_ACPI_WGSV_STATE_UWBEXIST     = 0x0010, /* UWB hw available */
145         TP_ACPI_WGSV_STATE_UWBPWR       = 0x0020, /* UWB radio enabled */
146 };
147
148 /****************************************************************************
149  * Main driver
150  */
151
152 #define TPACPI_NAME "thinkpad"
153 #define TPACPI_DESC "ThinkPad ACPI Extras"
154 #define TPACPI_FILE TPACPI_NAME "_acpi"
155 #define TPACPI_URL "http://ibm-acpi.sf.net/"
156 #define TPACPI_MAIL "ibm-acpi-devel@lists.sourceforge.net"
157
158 #define TPACPI_PROC_DIR "ibm"
159 #define TPACPI_ACPI_EVENT_PREFIX "ibm"
160 #define TPACPI_DRVR_NAME TPACPI_FILE
161 #define TPACPI_DRVR_SHORTNAME "tpacpi"
162 #define TPACPI_HWMON_DRVR_NAME TPACPI_NAME "_hwmon"
163
164 #define TPACPI_NVRAM_KTHREAD_NAME "ktpacpi_nvramd"
165 #define TPACPI_WORKQUEUE_NAME "ktpacpid"
166
167 #define TPACPI_MAX_ACPI_ARGS 3
168
169 /* printk headers */
170 #define TPACPI_LOG TPACPI_FILE ": "
171 #define TPACPI_EMERG    KERN_EMERG      TPACPI_LOG
172 #define TPACPI_ALERT    KERN_ALERT      TPACPI_LOG
173 #define TPACPI_CRIT     KERN_CRIT       TPACPI_LOG
174 #define TPACPI_ERR      KERN_ERR        TPACPI_LOG
175 #define TPACPI_WARN     KERN_WARNING    TPACPI_LOG
176 #define TPACPI_NOTICE   KERN_NOTICE     TPACPI_LOG
177 #define TPACPI_INFO     KERN_INFO       TPACPI_LOG
178 #define TPACPI_DEBUG    KERN_DEBUG      TPACPI_LOG
179
180 /* Debugging printk groups */
181 #define TPACPI_DBG_ALL          0xffff
182 #define TPACPI_DBG_DISCLOSETASK 0x8000
183 #define TPACPI_DBG_INIT         0x0001
184 #define TPACPI_DBG_EXIT         0x0002
185 #define TPACPI_DBG_RFKILL       0x0004
186 #define TPACPI_DBG_HKEY         0x0008
187 #define TPACPI_DBG_FAN          0x0010
188 #define TPACPI_DBG_BRGHT        0x0020
189
190 #define onoff(status, bit) ((status) & (1 << (bit)) ? "on" : "off")
191 #define enabled(status, bit) ((status) & (1 << (bit)) ? "enabled" : "disabled")
192 #define strlencmp(a, b) (strncmp((a), (b), strlen(b)))
193
194
195 /****************************************************************************
196  * Driver-wide structs and misc. variables
197  */
198
199 struct ibm_struct;
200
201 struct tp_acpi_drv_struct {
202         const struct acpi_device_id *hid;
203         struct acpi_driver *driver;
204
205         void (*notify) (struct ibm_struct *, u32);
206         acpi_handle *handle;
207         u32 type;
208         struct acpi_device *device;
209 };
210
211 struct ibm_struct {
212         char *name;
213
214         int (*read) (char *);
215         int (*write) (char *);
216         void (*exit) (void);
217         void (*resume) (void);
218         void (*suspend) (pm_message_t state);
219         void (*shutdown) (void);
220
221         struct list_head all_drivers;
222
223         struct tp_acpi_drv_struct *acpi;
224
225         struct {
226                 u8 acpi_driver_registered:1;
227                 u8 acpi_notify_installed:1;
228                 u8 proc_created:1;
229                 u8 init_called:1;
230                 u8 experimental:1;
231         } flags;
232 };
233
234 struct ibm_init_struct {
235         char param[32];
236
237         int (*init) (struct ibm_init_struct *);
238         struct ibm_struct *data;
239 };
240
241 static struct {
242         u32 bluetooth:1;
243         u32 hotkey:1;
244         u32 hotkey_mask:1;
245         u32 hotkey_wlsw:1;
246         u32 hotkey_tablet:1;
247         u32 light:1;
248         u32 light_status:1;
249         u32 bright_16levels:1;
250         u32 bright_acpimode:1;
251         u32 wan:1;
252         u32 uwb:1;
253         u32 fan_ctrl_status_undef:1;
254         u32 second_fan:1;
255         u32 beep_needs_two_args:1;
256         u32 input_device_registered:1;
257         u32 platform_drv_registered:1;
258         u32 platform_drv_attrs_registered:1;
259         u32 sensors_pdrv_registered:1;
260         u32 sensors_pdrv_attrs_registered:1;
261         u32 sensors_pdev_attrs_registered:1;
262         u32 hotkey_poll_active:1;
263 } tp_features;
264
265 static struct {
266         u16 hotkey_mask_ff:1;
267 } tp_warned;
268
269 struct thinkpad_id_data {
270         unsigned int vendor;    /* ThinkPad vendor:
271                                  * PCI_VENDOR_ID_IBM/PCI_VENDOR_ID_LENOVO */
272
273         char *bios_version_str; /* Something like 1ZET51WW (1.03z) */
274         char *ec_version_str;   /* Something like 1ZHT51WW-1.04a */
275
276         u16 bios_model;         /* 1Y = 0x5931, 0 = unknown */
277         u16 ec_model;
278         u16 bios_release;       /* 1ZETK1WW = 0x314b, 0 = unknown */
279         u16 ec_release;
280
281         char *model_str;        /* ThinkPad T43 */
282         char *nummodel_str;     /* 9384A9C for a 9384-A9C model */
283 };
284 static struct thinkpad_id_data thinkpad_id;
285
286 static enum {
287         TPACPI_LIFE_INIT = 0,
288         TPACPI_LIFE_RUNNING,
289         TPACPI_LIFE_EXITING,
290 } tpacpi_lifecycle;
291
292 static int experimental;
293 static u32 dbg_level;
294
295 static struct workqueue_struct *tpacpi_wq;
296
297 enum led_status_t {
298         TPACPI_LED_OFF = 0,
299         TPACPI_LED_ON,
300         TPACPI_LED_BLINK,
301 };
302
303 /* Special LED class that can defer work */
304 struct tpacpi_led_classdev {
305         struct led_classdev led_classdev;
306         struct work_struct work;
307         enum led_status_t new_state;
308         unsigned int led;
309 };
310
311 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
312 static int dbg_wlswemul;
313 static int tpacpi_wlsw_emulstate;
314 static int dbg_bluetoothemul;
315 static int tpacpi_bluetooth_emulstate;
316 static int dbg_wwanemul;
317 static int tpacpi_wwan_emulstate;
318 static int dbg_uwbemul;
319 static int tpacpi_uwb_emulstate;
320 #endif
321
322
323 /*************************************************************************
324  *  Debugging helpers
325  */
326
327 #define dbg_printk(a_dbg_level, format, arg...) \
328         do { if (dbg_level & (a_dbg_level)) \
329                 printk(TPACPI_DEBUG "%s: " format, __func__ , ## arg); \
330         } while (0)
331
332 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
333 #define vdbg_printk dbg_printk
334 static const char *str_supported(int is_supported);
335 #else
336 #define vdbg_printk(a_dbg_level, format, arg...) \
337         do { } while (0)
338 #endif
339
340 static void tpacpi_log_usertask(const char * const what)
341 {
342         printk(TPACPI_DEBUG "%s: access by process with PID %d\n",
343                 what, task_tgid_vnr(current));
344 }
345
346 #define tpacpi_disclose_usertask(what, format, arg...) \
347         do { \
348                 if (unlikely( \
349                     (dbg_level & TPACPI_DBG_DISCLOSETASK) && \
350                     (tpacpi_lifecycle == TPACPI_LIFE_RUNNING))) { \
351                         printk(TPACPI_DEBUG "%s: PID %d: " format, \
352                                 what, task_tgid_vnr(current), ## arg); \
353                 } \
354         } while (0)
355
356 /*
357  * Quirk handling helpers
358  *
359  * ThinkPad IDs and versions seen in the field so far
360  * are two-characters from the set [0-9A-Z], i.e. base 36.
361  *
362  * We use values well outside that range as specials.
363  */
364
365 #define TPACPI_MATCH_ANY                0xffffU
366 #define TPACPI_MATCH_UNKNOWN            0U
367
368 /* TPID('1', 'Y') == 0x5931 */
369 #define TPID(__c1, __c2) (((__c2) << 8) | (__c1))
370
371 #define TPACPI_Q_IBM(__id1, __id2, __quirk)     \
372         { .vendor = PCI_VENDOR_ID_IBM,          \
373           .bios = TPID(__id1, __id2),           \
374           .ec = TPACPI_MATCH_ANY,               \
375           .quirks = (__quirk) }
376
377 #define TPACPI_Q_LNV(__id1, __id2, __quirk)     \
378         { .vendor = PCI_VENDOR_ID_LENOVO,       \
379           .bios = TPID(__id1, __id2),           \
380           .ec = TPACPI_MATCH_ANY,               \
381           .quirks = (__quirk) }
382
383 struct tpacpi_quirk {
384         unsigned int vendor;
385         u16 bios;
386         u16 ec;
387         unsigned long quirks;
388 };
389
390 /**
391  * tpacpi_check_quirks() - search BIOS/EC version on a list
392  * @qlist:              array of &struct tpacpi_quirk
393  * @qlist_size:         number of elements in @qlist
394  *
395  * Iterates over a quirks list until one is found that matches the
396  * ThinkPad's vendor, BIOS and EC model.
397  *
398  * Returns 0 if nothing matches, otherwise returns the quirks field of
399  * the matching &struct tpacpi_quirk entry.
400  *
401  * The match criteria is: vendor, ec and bios much match.
402  */
403 static unsigned long __init tpacpi_check_quirks(
404                         const struct tpacpi_quirk *qlist,
405                         unsigned int qlist_size)
406 {
407         while (qlist_size) {
408                 if ((qlist->vendor == thinkpad_id.vendor ||
409                                 qlist->vendor == TPACPI_MATCH_ANY) &&
410                     (qlist->bios == thinkpad_id.bios_model ||
411                                 qlist->bios == TPACPI_MATCH_ANY) &&
412                     (qlist->ec == thinkpad_id.ec_model ||
413                                 qlist->ec == TPACPI_MATCH_ANY))
414                         return qlist->quirks;
415
416                 qlist_size--;
417                 qlist++;
418         }
419         return 0;
420 }
421
422
423 /****************************************************************************
424  ****************************************************************************
425  *
426  * ACPI Helpers and device model
427  *
428  ****************************************************************************
429  ****************************************************************************/
430
431 /*************************************************************************
432  * ACPI basic handles
433  */
434
435 static acpi_handle root_handle;
436
437 #define TPACPI_HANDLE(object, parent, paths...)                 \
438         static acpi_handle  object##_handle;                    \
439         static acpi_handle *object##_parent = &parent##_handle; \
440         static char        *object##_path;                      \
441         static char        *object##_paths[] = { paths }
442
443 TPACPI_HANDLE(ec, root, "\\_SB.PCI0.ISA.EC0",   /* 240, 240x */
444            "\\_SB.PCI.ISA.EC",  /* 570 */
445            "\\_SB.PCI0.ISA0.EC0",       /* 600e/x, 770e, 770x */
446            "\\_SB.PCI0.ISA.EC", /* A21e, A2xm/p, T20-22, X20-21 */
447            "\\_SB.PCI0.AD4S.EC0",       /* i1400, R30 */
448            "\\_SB.PCI0.ICH3.EC0",       /* R31 */
449            "\\_SB.PCI0.LPC.EC", /* all others */
450            );
451
452 TPACPI_HANDLE(ecrd, ec, "ECRD");        /* 570 */
453 TPACPI_HANDLE(ecwr, ec, "ECWR");        /* 570 */
454
455 TPACPI_HANDLE(cmos, root, "\\UCMS",     /* R50, R50e, R50p, R51, */
456                                         /* T4x, X31, X40 */
457            "\\CMOS",            /* A3x, G4x, R32, T23, T30, X22-24, X30 */
458            "\\CMS",             /* R40, R40e */
459            );                   /* all others */
460
461 TPACPI_HANDLE(hkey, ec, "\\_SB.HKEY",   /* 600e/x, 770e, 770x */
462            "^HKEY",             /* R30, R31 */
463            "HKEY",              /* all others */
464            );                   /* 570 */
465
466 TPACPI_HANDLE(vid, root, "\\_SB.PCI.AGP.VGA",   /* 570 */
467            "\\_SB.PCI0.AGP0.VID0",      /* 600e/x, 770x */
468            "\\_SB.PCI0.VID0",   /* 770e */
469            "\\_SB.PCI0.VID",    /* A21e, G4x, R50e, X30, X40 */
470            "\\_SB.PCI0.AGP.VID",        /* all others */
471            );                           /* R30, R31 */
472
473
474 /*************************************************************************
475  * ACPI helpers
476  */
477
478 static int acpi_evalf(acpi_handle handle,
479                       void *res, char *method, char *fmt, ...)
480 {
481         char *fmt0 = fmt;
482         struct acpi_object_list params;
483         union acpi_object in_objs[TPACPI_MAX_ACPI_ARGS];
484         struct acpi_buffer result, *resultp;
485         union acpi_object out_obj;
486         acpi_status status;
487         va_list ap;
488         char res_type;
489         int success;
490         int quiet;
491
492         if (!*fmt) {
493                 printk(TPACPI_ERR "acpi_evalf() called with empty format\n");
494                 return 0;
495         }
496
497         if (*fmt == 'q') {
498                 quiet = 1;
499                 fmt++;
500         } else
501                 quiet = 0;
502
503         res_type = *(fmt++);
504
505         params.count = 0;
506         params.pointer = &in_objs[0];
507
508         va_start(ap, fmt);
509         while (*fmt) {
510                 char c = *(fmt++);
511                 switch (c) {
512                 case 'd':       /* int */
513                         in_objs[params.count].integer.value = va_arg(ap, int);
514                         in_objs[params.count++].type = ACPI_TYPE_INTEGER;
515                         break;
516                         /* add more types as needed */
517                 default:
518                         printk(TPACPI_ERR "acpi_evalf() called "
519                                "with invalid format character '%c'\n", c);
520                         return 0;
521                 }
522         }
523         va_end(ap);
524
525         if (res_type != 'v') {
526                 result.length = sizeof(out_obj);
527                 result.pointer = &out_obj;
528                 resultp = &result;
529         } else
530                 resultp = NULL;
531
532         status = acpi_evaluate_object(handle, method, &params, resultp);
533
534         switch (res_type) {
535         case 'd':               /* int */
536                 if (res)
537                         *(int *)res = out_obj.integer.value;
538                 success = status == AE_OK && out_obj.type == ACPI_TYPE_INTEGER;
539                 break;
540         case 'v':               /* void */
541                 success = status == AE_OK;
542                 break;
543                 /* add more types as needed */
544         default:
545                 printk(TPACPI_ERR "acpi_evalf() called "
546                        "with invalid format character '%c'\n", res_type);
547                 return 0;
548         }
549
550         if (!success && !quiet)
551                 printk(TPACPI_ERR "acpi_evalf(%s, %s, ...) failed: %d\n",
552                        method, fmt0, status);
553
554         return success;
555 }
556
557 static int acpi_ec_read(int i, u8 *p)
558 {
559         int v;
560
561         if (ecrd_handle) {
562                 if (!acpi_evalf(ecrd_handle, &v, NULL, "dd", i))
563                         return 0;
564                 *p = v;
565         } else {
566                 if (ec_read(i, p) < 0)
567                         return 0;
568         }
569
570         return 1;
571 }
572
573 static int acpi_ec_write(int i, u8 v)
574 {
575         if (ecwr_handle) {
576                 if (!acpi_evalf(ecwr_handle, NULL, NULL, "vdd", i, v))
577                         return 0;
578         } else {
579                 if (ec_write(i, v) < 0)
580                         return 0;
581         }
582
583         return 1;
584 }
585
586 static int issue_thinkpad_cmos_command(int cmos_cmd)
587 {
588         if (!cmos_handle)
589                 return -ENXIO;
590
591         if (!acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd))
592                 return -EIO;
593
594         return 0;
595 }
596
597 /*************************************************************************
598  * ACPI device model
599  */
600
601 #define TPACPI_ACPIHANDLE_INIT(object) \
602         drv_acpi_handle_init(#object, &object##_handle, *object##_parent, \
603                 object##_paths, ARRAY_SIZE(object##_paths), &object##_path)
604
605 static void drv_acpi_handle_init(char *name,
606                            acpi_handle *handle, acpi_handle parent,
607                            char **paths, int num_paths, char **path)
608 {
609         int i;
610         acpi_status status;
611
612         vdbg_printk(TPACPI_DBG_INIT, "trying to locate ACPI handle for %s\n",
613                 name);
614
615         for (i = 0; i < num_paths; i++) {
616                 status = acpi_get_handle(parent, paths[i], handle);
617                 if (ACPI_SUCCESS(status)) {
618                         *path = paths[i];
619                         dbg_printk(TPACPI_DBG_INIT,
620                                    "Found ACPI handle %s for %s\n",
621                                    *path, name);
622                         return;
623                 }
624         }
625
626         vdbg_printk(TPACPI_DBG_INIT, "ACPI handle for %s not found\n",
627                     name);
628         *handle = NULL;
629 }
630
631 static void dispatch_acpi_notify(acpi_handle handle, u32 event, void *data)
632 {
633         struct ibm_struct *ibm = data;
634
635         if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
636                 return;
637
638         if (!ibm || !ibm->acpi || !ibm->acpi->notify)
639                 return;
640
641         ibm->acpi->notify(ibm, event);
642 }
643
644 static int __init setup_acpi_notify(struct ibm_struct *ibm)
645 {
646         acpi_status status;
647         int rc;
648
649         BUG_ON(!ibm->acpi);
650
651         if (!*ibm->acpi->handle)
652                 return 0;
653
654         vdbg_printk(TPACPI_DBG_INIT,
655                 "setting up ACPI notify for %s\n", ibm->name);
656
657         rc = acpi_bus_get_device(*ibm->acpi->handle, &ibm->acpi->device);
658         if (rc < 0) {
659                 printk(TPACPI_ERR "acpi_bus_get_device(%s) failed: %d\n",
660                         ibm->name, rc);
661                 return -ENODEV;
662         }
663
664         ibm->acpi->device->driver_data = ibm;
665         sprintf(acpi_device_class(ibm->acpi->device), "%s/%s",
666                 TPACPI_ACPI_EVENT_PREFIX,
667                 ibm->name);
668
669         status = acpi_install_notify_handler(*ibm->acpi->handle,
670                         ibm->acpi->type, dispatch_acpi_notify, ibm);
671         if (ACPI_FAILURE(status)) {
672                 if (status == AE_ALREADY_EXISTS) {
673                         printk(TPACPI_NOTICE
674                                "another device driver is already "
675                                "handling %s events\n", ibm->name);
676                 } else {
677                         printk(TPACPI_ERR
678                                "acpi_install_notify_handler(%s) failed: %d\n",
679                                ibm->name, status);
680                 }
681                 return -ENODEV;
682         }
683         ibm->flags.acpi_notify_installed = 1;
684         return 0;
685 }
686
687 static int __init tpacpi_device_add(struct acpi_device *device)
688 {
689         return 0;
690 }
691
692 static int __init register_tpacpi_subdriver(struct ibm_struct *ibm)
693 {
694         int rc;
695
696         dbg_printk(TPACPI_DBG_INIT,
697                 "registering %s as an ACPI driver\n", ibm->name);
698
699         BUG_ON(!ibm->acpi);
700
701         ibm->acpi->driver = kzalloc(sizeof(struct acpi_driver), GFP_KERNEL);
702         if (!ibm->acpi->driver) {
703                 printk(TPACPI_ERR
704                        "failed to allocate memory for ibm->acpi->driver\n");
705                 return -ENOMEM;
706         }
707
708         sprintf(ibm->acpi->driver->name, "%s_%s", TPACPI_NAME, ibm->name);
709         ibm->acpi->driver->ids = ibm->acpi->hid;
710
711         ibm->acpi->driver->ops.add = &tpacpi_device_add;
712
713         rc = acpi_bus_register_driver(ibm->acpi->driver);
714         if (rc < 0) {
715                 printk(TPACPI_ERR "acpi_bus_register_driver(%s) failed: %d\n",
716                        ibm->name, rc);
717                 kfree(ibm->acpi->driver);
718                 ibm->acpi->driver = NULL;
719         } else if (!rc)
720                 ibm->flags.acpi_driver_registered = 1;
721
722         return rc;
723 }
724
725
726 /****************************************************************************
727  ****************************************************************************
728  *
729  * Procfs Helpers
730  *
731  ****************************************************************************
732  ****************************************************************************/
733
734 static int dispatch_procfs_read(char *page, char **start, off_t off,
735                         int count, int *eof, void *data)
736 {
737         struct ibm_struct *ibm = data;
738         int len;
739
740         if (!ibm || !ibm->read)
741                 return -EINVAL;
742
743         len = ibm->read(page);
744         if (len < 0)
745                 return len;
746
747         if (len <= off + count)
748                 *eof = 1;
749         *start = page + off;
750         len -= off;
751         if (len > count)
752                 len = count;
753         if (len < 0)
754                 len = 0;
755
756         return len;
757 }
758
759 static int dispatch_procfs_write(struct file *file,
760                         const char __user *userbuf,
761                         unsigned long count, void *data)
762 {
763         struct ibm_struct *ibm = data;
764         char *kernbuf;
765         int ret;
766
767         if (!ibm || !ibm->write)
768                 return -EINVAL;
769         if (count > PAGE_SIZE - 2)
770                 return -EINVAL;
771
772         kernbuf = kmalloc(count + 2, GFP_KERNEL);
773         if (!kernbuf)
774                 return -ENOMEM;
775
776         if (copy_from_user(kernbuf, userbuf, count)) {
777                 kfree(kernbuf);
778                 return -EFAULT;
779         }
780
781         kernbuf[count] = 0;
782         strcat(kernbuf, ",");
783         ret = ibm->write(kernbuf);
784         if (ret == 0)
785                 ret = count;
786
787         kfree(kernbuf);
788
789         return ret;
790 }
791
792 static char *next_cmd(char **cmds)
793 {
794         char *start = *cmds;
795         char *end;
796
797         while ((end = strchr(start, ',')) && end == start)
798                 start = end + 1;
799
800         if (!end)
801                 return NULL;
802
803         *end = 0;
804         *cmds = end + 1;
805         return start;
806 }
807
808
809 /****************************************************************************
810  ****************************************************************************
811  *
812  * Device model: input, hwmon and platform
813  *
814  ****************************************************************************
815  ****************************************************************************/
816
817 static struct platform_device *tpacpi_pdev;
818 static struct platform_device *tpacpi_sensors_pdev;
819 static struct device *tpacpi_hwmon;
820 static struct input_dev *tpacpi_inputdev;
821 static struct mutex tpacpi_inputdev_send_mutex;
822 static LIST_HEAD(tpacpi_all_drivers);
823
824 static int tpacpi_suspend_handler(struct platform_device *pdev,
825                                   pm_message_t state)
826 {
827         struct ibm_struct *ibm, *itmp;
828
829         list_for_each_entry_safe(ibm, itmp,
830                                  &tpacpi_all_drivers,
831                                  all_drivers) {
832                 if (ibm->suspend)
833                         (ibm->suspend)(state);
834         }
835
836         return 0;
837 }
838
839 static int tpacpi_resume_handler(struct platform_device *pdev)
840 {
841         struct ibm_struct *ibm, *itmp;
842
843         list_for_each_entry_safe(ibm, itmp,
844                                  &tpacpi_all_drivers,
845                                  all_drivers) {
846                 if (ibm->resume)
847                         (ibm->resume)();
848         }
849
850         return 0;
851 }
852
853 static void tpacpi_shutdown_handler(struct platform_device *pdev)
854 {
855         struct ibm_struct *ibm, *itmp;
856
857         list_for_each_entry_safe(ibm, itmp,
858                                  &tpacpi_all_drivers,
859                                  all_drivers) {
860                 if (ibm->shutdown)
861                         (ibm->shutdown)();
862         }
863 }
864
865 static struct platform_driver tpacpi_pdriver = {
866         .driver = {
867                 .name = TPACPI_DRVR_NAME,
868                 .owner = THIS_MODULE,
869         },
870         .suspend = tpacpi_suspend_handler,
871         .resume = tpacpi_resume_handler,
872         .shutdown = tpacpi_shutdown_handler,
873 };
874
875 static struct platform_driver tpacpi_hwmon_pdriver = {
876         .driver = {
877                 .name = TPACPI_HWMON_DRVR_NAME,
878                 .owner = THIS_MODULE,
879         },
880 };
881
882 /*************************************************************************
883  * sysfs support helpers
884  */
885
886 struct attribute_set {
887         unsigned int members, max_members;
888         struct attribute_group group;
889 };
890
891 struct attribute_set_obj {
892         struct attribute_set s;
893         struct attribute *a;
894 } __attribute__((packed));
895
896 static struct attribute_set *create_attr_set(unsigned int max_members,
897                                                 const char *name)
898 {
899         struct attribute_set_obj *sobj;
900
901         if (max_members == 0)
902                 return NULL;
903
904         /* Allocates space for implicit NULL at the end too */
905         sobj = kzalloc(sizeof(struct attribute_set_obj) +
906                     max_members * sizeof(struct attribute *),
907                     GFP_KERNEL);
908         if (!sobj)
909                 return NULL;
910         sobj->s.max_members = max_members;
911         sobj->s.group.attrs = &sobj->a;
912         sobj->s.group.name = name;
913
914         return &sobj->s;
915 }
916
917 #define destroy_attr_set(_set) \
918         kfree(_set);
919
920 /* not multi-threaded safe, use it in a single thread per set */
921 static int add_to_attr_set(struct attribute_set *s, struct attribute *attr)
922 {
923         if (!s || !attr)
924                 return -EINVAL;
925
926         if (s->members >= s->max_members)
927                 return -ENOMEM;
928
929         s->group.attrs[s->members] = attr;
930         s->members++;
931
932         return 0;
933 }
934
935 static int add_many_to_attr_set(struct attribute_set *s,
936                         struct attribute **attr,
937                         unsigned int count)
938 {
939         int i, res;
940
941         for (i = 0; i < count; i++) {
942                 res = add_to_attr_set(s, attr[i]);
943                 if (res)
944                         return res;
945         }
946
947         return 0;
948 }
949
950 static void delete_attr_set(struct attribute_set *s, struct kobject *kobj)
951 {
952         sysfs_remove_group(kobj, &s->group);
953         destroy_attr_set(s);
954 }
955
956 #define register_attr_set_with_sysfs(_attr_set, _kobj) \
957         sysfs_create_group(_kobj, &_attr_set->group)
958
959 static int parse_strtoul(const char *buf,
960                 unsigned long max, unsigned long *value)
961 {
962         char *endp;
963
964         while (*buf && isspace(*buf))
965                 buf++;
966         *value = simple_strtoul(buf, &endp, 0);
967         while (*endp && isspace(*endp))
968                 endp++;
969         if (*endp || *value > max)
970                 return -EINVAL;
971
972         return 0;
973 }
974
975 static void tpacpi_disable_brightness_delay(void)
976 {
977         if (acpi_evalf(hkey_handle, NULL, "PWMS", "qvd", 0))
978                 printk(TPACPI_NOTICE
979                         "ACPI backlight control delay disabled\n");
980 }
981
982 static int __init tpacpi_query_bcl_levels(acpi_handle handle)
983 {
984         struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
985         union acpi_object *obj;
986         int rc;
987
988         if (ACPI_SUCCESS(acpi_evaluate_object(handle, NULL, NULL, &buffer))) {
989                 obj = (union acpi_object *)buffer.pointer;
990                 if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) {
991                         printk(TPACPI_ERR "Unknown _BCL data, "
992                                "please report this to %s\n", TPACPI_MAIL);
993                         rc = 0;
994                 } else {
995                         rc = obj->package.count;
996                 }
997         } else {
998                 return 0;
999         }
1000
1001         kfree(buffer.pointer);
1002         return rc;
1003 }
1004
1005 static acpi_status __init tpacpi_acpi_walk_find_bcl(acpi_handle handle,
1006                                         u32 lvl, void *context, void **rv)
1007 {
1008         char name[ACPI_PATH_SEGMENT_LENGTH];
1009         struct acpi_buffer buffer = { sizeof(name), &name };
1010
1011         if (ACPI_SUCCESS(acpi_get_name(handle, ACPI_SINGLE_NAME, &buffer)) &&
1012             !strncmp("_BCL", name, sizeof(name) - 1)) {
1013                 BUG_ON(!rv || !*rv);
1014                 **(int **)rv = tpacpi_query_bcl_levels(handle);
1015                 return AE_CTRL_TERMINATE;
1016         } else {
1017                 return AE_OK;
1018         }
1019 }
1020
1021 /*
1022  * Returns 0 (no ACPI _BCL or _BCL invalid), or size of brightness map
1023  */
1024 static int __init tpacpi_check_std_acpi_brightness_support(void)
1025 {
1026         int status;
1027         int bcl_levels = 0;
1028         void *bcl_ptr = &bcl_levels;
1029
1030         if (!vid_handle) {
1031                 TPACPI_ACPIHANDLE_INIT(vid);
1032         }
1033         if (!vid_handle)
1034                 return 0;
1035
1036         /*
1037          * Search for a _BCL method, and execute it.  This is safe on all
1038          * ThinkPads, and as a side-effect, _BCL will place a Lenovo Vista
1039          * BIOS in ACPI backlight control mode.  We do NOT have to care
1040          * about calling the _BCL method in an enabled video device, any
1041          * will do for our purposes.
1042          */
1043
1044         status = acpi_walk_namespace(ACPI_TYPE_METHOD, vid_handle, 3,
1045                                      tpacpi_acpi_walk_find_bcl, NULL,
1046                                      &bcl_ptr);
1047
1048         if (ACPI_SUCCESS(status) && bcl_levels > 2) {
1049                 tp_features.bright_acpimode = 1;
1050                 return (bcl_levels - 2);
1051         }
1052
1053         return 0;
1054 }
1055
1056 static void printk_deprecated_attribute(const char * const what,
1057                                         const char * const details)
1058 {
1059         tpacpi_log_usertask("deprecated sysfs attribute");
1060         printk(TPACPI_WARN "WARNING: sysfs attribute %s is deprecated and "
1061                 "will be removed. %s\n",
1062                 what, details);
1063 }
1064
1065 /*************************************************************************
1066  * rfkill and radio control support helpers
1067  */
1068
1069 /*
1070  * ThinkPad-ACPI firmware handling model:
1071  *
1072  * WLSW (master wireless switch) is event-driven, and is common to all
1073  * firmware-controlled radios.  It cannot be controlled, just monitored,
1074  * as expected.  It overrides all radio state in firmware
1075  *
1076  * The kernel, a masked-off hotkey, and WLSW can change the radio state
1077  * (TODO: verify how WLSW interacts with the returned radio state).
1078  *
1079  * The only time there are shadow radio state changes, is when
1080  * masked-off hotkeys are used.
1081  */
1082
1083 /*
1084  * Internal driver API for radio state:
1085  *
1086  * int: < 0 = error, otherwise enum tpacpi_rfkill_state
1087  * bool: true means radio blocked (off)
1088  */
1089 enum tpacpi_rfkill_state {
1090         TPACPI_RFK_RADIO_OFF = 0,
1091         TPACPI_RFK_RADIO_ON
1092 };
1093
1094 /* rfkill switches */
1095 enum tpacpi_rfk_id {
1096         TPACPI_RFK_BLUETOOTH_SW_ID = 0,
1097         TPACPI_RFK_WWAN_SW_ID,
1098         TPACPI_RFK_UWB_SW_ID,
1099         TPACPI_RFK_SW_MAX
1100 };
1101
1102 static const char *tpacpi_rfkill_names[] = {
1103         [TPACPI_RFK_BLUETOOTH_SW_ID] = "bluetooth",
1104         [TPACPI_RFK_WWAN_SW_ID] = "wwan",
1105         [TPACPI_RFK_UWB_SW_ID] = "uwb",
1106         [TPACPI_RFK_SW_MAX] = NULL
1107 };
1108
1109 /* ThinkPad-ACPI rfkill subdriver */
1110 struct tpacpi_rfk {
1111         struct rfkill *rfkill;
1112         enum tpacpi_rfk_id id;
1113         const struct tpacpi_rfk_ops *ops;
1114 };
1115
1116 struct tpacpi_rfk_ops {
1117         /* firmware interface */
1118         int (*get_status)(void);
1119         int (*set_status)(const enum tpacpi_rfkill_state);
1120 };
1121
1122 static struct tpacpi_rfk *tpacpi_rfkill_switches[TPACPI_RFK_SW_MAX];
1123
1124 /* Query FW and update rfkill sw state for a given rfkill switch */
1125 static int tpacpi_rfk_update_swstate(const struct tpacpi_rfk *tp_rfk)
1126 {
1127         int status;
1128
1129         if (!tp_rfk)
1130                 return -ENODEV;
1131
1132         status = (tp_rfk->ops->get_status)();
1133         if (status < 0)
1134                 return status;
1135
1136         rfkill_set_sw_state(tp_rfk->rfkill,
1137                             (status == TPACPI_RFK_RADIO_OFF));
1138
1139         return status;
1140 }
1141
1142 /* Query FW and update rfkill sw state for all rfkill switches */
1143 static void tpacpi_rfk_update_swstate_all(void)
1144 {
1145         unsigned int i;
1146
1147         for (i = 0; i < TPACPI_RFK_SW_MAX; i++)
1148                 tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[i]);
1149 }
1150
1151 /*
1152  * Sync the HW-blocking state of all rfkill switches,
1153  * do notice it causes the rfkill core to schedule uevents
1154  */
1155 static void tpacpi_rfk_update_hwblock_state(bool blocked)
1156 {
1157         unsigned int i;
1158         struct tpacpi_rfk *tp_rfk;
1159
1160         for (i = 0; i < TPACPI_RFK_SW_MAX; i++) {
1161                 tp_rfk = tpacpi_rfkill_switches[i];
1162                 if (tp_rfk) {
1163                         if (rfkill_set_hw_state(tp_rfk->rfkill,
1164                                                 blocked)) {
1165                                 /* ignore -- we track sw block */
1166                         }
1167                 }
1168         }
1169 }
1170
1171 /* Call to get the WLSW state from the firmware */
1172 static int hotkey_get_wlsw(void);
1173
1174 /* Call to query WLSW state and update all rfkill switches */
1175 static bool tpacpi_rfk_check_hwblock_state(void)
1176 {
1177         int res = hotkey_get_wlsw();
1178         int hw_blocked;
1179
1180         /* When unknown or unsupported, we have to assume it is unblocked */
1181         if (res < 0)
1182                 return false;
1183
1184         hw_blocked = (res == TPACPI_RFK_RADIO_OFF);
1185         tpacpi_rfk_update_hwblock_state(hw_blocked);
1186
1187         return hw_blocked;
1188 }
1189
1190 static int tpacpi_rfk_hook_set_block(void *data, bool blocked)
1191 {
1192         struct tpacpi_rfk *tp_rfk = data;
1193         int res;
1194
1195         dbg_printk(TPACPI_DBG_RFKILL,
1196                    "request to change radio state to %s\n",
1197                    blocked ? "blocked" : "unblocked");
1198
1199         /* try to set radio state */
1200         res = (tp_rfk->ops->set_status)(blocked ?
1201                                 TPACPI_RFK_RADIO_OFF : TPACPI_RFK_RADIO_ON);
1202
1203         /* and update the rfkill core with whatever the FW really did */
1204         tpacpi_rfk_update_swstate(tp_rfk);
1205
1206         return (res < 0) ? res : 0;
1207 }
1208
1209 static const struct rfkill_ops tpacpi_rfk_rfkill_ops = {
1210         .set_block = tpacpi_rfk_hook_set_block,
1211 };
1212
1213 static int __init tpacpi_new_rfkill(const enum tpacpi_rfk_id id,
1214                         const struct tpacpi_rfk_ops *tp_rfkops,
1215                         const enum rfkill_type rfktype,
1216                         const char *name,
1217                         const bool set_default)
1218 {
1219         struct tpacpi_rfk *atp_rfk;
1220         int res;
1221         bool sw_state = false;
1222         int sw_status;
1223
1224         BUG_ON(id >= TPACPI_RFK_SW_MAX || tpacpi_rfkill_switches[id]);
1225
1226         atp_rfk = kzalloc(sizeof(struct tpacpi_rfk), GFP_KERNEL);
1227         if (atp_rfk)
1228                 atp_rfk->rfkill = rfkill_alloc(name,
1229                                                 &tpacpi_pdev->dev,
1230                                                 rfktype,
1231                                                 &tpacpi_rfk_rfkill_ops,
1232                                                 atp_rfk);
1233         if (!atp_rfk || !atp_rfk->rfkill) {
1234                 printk(TPACPI_ERR
1235                         "failed to allocate memory for rfkill class\n");
1236                 kfree(atp_rfk);
1237                 return -ENOMEM;
1238         }
1239
1240         atp_rfk->id = id;
1241         atp_rfk->ops = tp_rfkops;
1242
1243         sw_status = (tp_rfkops->get_status)();
1244         if (sw_status < 0) {
1245                 printk(TPACPI_ERR
1246                         "failed to read initial state for %s, error %d\n",
1247                         name, sw_status);
1248         } else {
1249                 sw_state = (sw_status == TPACPI_RFK_RADIO_OFF);
1250                 if (set_default) {
1251                         /* try to keep the initial state, since we ask the
1252                          * firmware to preserve it across S5 in NVRAM */
1253                         rfkill_init_sw_state(atp_rfk->rfkill, sw_state);
1254                 }
1255         }
1256         rfkill_set_hw_state(atp_rfk->rfkill, tpacpi_rfk_check_hwblock_state());
1257
1258         res = rfkill_register(atp_rfk->rfkill);
1259         if (res < 0) {
1260                 printk(TPACPI_ERR
1261                         "failed to register %s rfkill switch: %d\n",
1262                         name, res);
1263                 rfkill_destroy(atp_rfk->rfkill);
1264                 kfree(atp_rfk);
1265                 return res;
1266         }
1267
1268         tpacpi_rfkill_switches[id] = atp_rfk;
1269         return 0;
1270 }
1271
1272 static void tpacpi_destroy_rfkill(const enum tpacpi_rfk_id id)
1273 {
1274         struct tpacpi_rfk *tp_rfk;
1275
1276         BUG_ON(id >= TPACPI_RFK_SW_MAX);
1277
1278         tp_rfk = tpacpi_rfkill_switches[id];
1279         if (tp_rfk) {
1280                 rfkill_unregister(tp_rfk->rfkill);
1281                 rfkill_destroy(tp_rfk->rfkill);
1282                 tpacpi_rfkill_switches[id] = NULL;
1283                 kfree(tp_rfk);
1284         }
1285 }
1286
1287 static void printk_deprecated_rfkill_attribute(const char * const what)
1288 {
1289         printk_deprecated_attribute(what,
1290                         "Please switch to generic rfkill before year 2010");
1291 }
1292
1293 /* sysfs <radio> enable ------------------------------------------------ */
1294 static ssize_t tpacpi_rfk_sysfs_enable_show(const enum tpacpi_rfk_id id,
1295                                             struct device_attribute *attr,
1296                                             char *buf)
1297 {
1298         int status;
1299
1300         printk_deprecated_rfkill_attribute(attr->attr.name);
1301
1302         /* This is in the ABI... */
1303         if (tpacpi_rfk_check_hwblock_state()) {
1304                 status = TPACPI_RFK_RADIO_OFF;
1305         } else {
1306                 status = tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]);
1307                 if (status < 0)
1308                         return status;
1309         }
1310
1311         return snprintf(buf, PAGE_SIZE, "%d\n",
1312                         (status == TPACPI_RFK_RADIO_ON) ? 1 : 0);
1313 }
1314
1315 static ssize_t tpacpi_rfk_sysfs_enable_store(const enum tpacpi_rfk_id id,
1316                             struct device_attribute *attr,
1317                             const char *buf, size_t count)
1318 {
1319         unsigned long t;
1320         int res;
1321
1322         printk_deprecated_rfkill_attribute(attr->attr.name);
1323
1324         if (parse_strtoul(buf, 1, &t))
1325                 return -EINVAL;
1326
1327         tpacpi_disclose_usertask(attr->attr.name, "set to %ld\n", t);
1328
1329         /* This is in the ABI... */
1330         if (tpacpi_rfk_check_hwblock_state() && !!t)
1331                 return -EPERM;
1332
1333         res = tpacpi_rfkill_switches[id]->ops->set_status((!!t) ?
1334                                 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF);
1335         tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]);
1336
1337         return (res < 0) ? res : count;
1338 }
1339
1340 /* procfs -------------------------------------------------------------- */
1341 static int tpacpi_rfk_procfs_read(const enum tpacpi_rfk_id id, char *p)
1342 {
1343         int len = 0;
1344
1345         if (id >= TPACPI_RFK_SW_MAX)
1346                 len += sprintf(p + len, "status:\t\tnot supported\n");
1347         else {
1348                 int status;
1349
1350                 /* This is in the ABI... */
1351                 if (tpacpi_rfk_check_hwblock_state()) {
1352                         status = TPACPI_RFK_RADIO_OFF;
1353                 } else {
1354                         status = tpacpi_rfk_update_swstate(
1355                                                 tpacpi_rfkill_switches[id]);
1356                         if (status < 0)
1357                                 return status;
1358                 }
1359
1360                 len += sprintf(p + len, "status:\t\t%s\n",
1361                                 (status == TPACPI_RFK_RADIO_ON) ?
1362                                         "enabled" : "disabled");
1363                 len += sprintf(p + len, "commands:\tenable, disable\n");
1364         }
1365
1366         return len;
1367 }
1368
1369 static int tpacpi_rfk_procfs_write(const enum tpacpi_rfk_id id, char *buf)
1370 {
1371         char *cmd;
1372         int status = -1;
1373         int res = 0;
1374
1375         if (id >= TPACPI_RFK_SW_MAX)
1376                 return -ENODEV;
1377
1378         while ((cmd = next_cmd(&buf))) {
1379                 if (strlencmp(cmd, "enable") == 0)
1380                         status = TPACPI_RFK_RADIO_ON;
1381                 else if (strlencmp(cmd, "disable") == 0)
1382                         status = TPACPI_RFK_RADIO_OFF;
1383                 else
1384                         return -EINVAL;
1385         }
1386
1387         if (status != -1) {
1388                 tpacpi_disclose_usertask("procfs", "attempt to %s %s\n",
1389                                 (status == TPACPI_RFK_RADIO_ON) ?
1390                                                 "enable" : "disable",
1391                                 tpacpi_rfkill_names[id]);
1392                 res = (tpacpi_rfkill_switches[id]->ops->set_status)(status);
1393                 tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]);
1394         }
1395
1396         return res;
1397 }
1398
1399 /*************************************************************************
1400  * thinkpad-acpi driver attributes
1401  */
1402
1403 /* interface_version --------------------------------------------------- */
1404 static ssize_t tpacpi_driver_interface_version_show(
1405                                 struct device_driver *drv,
1406                                 char *buf)
1407 {
1408         return snprintf(buf, PAGE_SIZE, "0x%08x\n", TPACPI_SYSFS_VERSION);
1409 }
1410
1411 static DRIVER_ATTR(interface_version, S_IRUGO,
1412                 tpacpi_driver_interface_version_show, NULL);
1413
1414 /* debug_level --------------------------------------------------------- */
1415 static ssize_t tpacpi_driver_debug_show(struct device_driver *drv,
1416                                                 char *buf)
1417 {
1418         return snprintf(buf, PAGE_SIZE, "0x%04x\n", dbg_level);
1419 }
1420
1421 static ssize_t tpacpi_driver_debug_store(struct device_driver *drv,
1422                                                 const char *buf, size_t count)
1423 {
1424         unsigned long t;
1425
1426         if (parse_strtoul(buf, 0xffff, &t))
1427                 return -EINVAL;
1428
1429         dbg_level = t;
1430
1431         return count;
1432 }
1433
1434 static DRIVER_ATTR(debug_level, S_IWUSR | S_IRUGO,
1435                 tpacpi_driver_debug_show, tpacpi_driver_debug_store);
1436
1437 /* version ------------------------------------------------------------- */
1438 static ssize_t tpacpi_driver_version_show(struct device_driver *drv,
1439                                                 char *buf)
1440 {
1441         return snprintf(buf, PAGE_SIZE, "%s v%s\n",
1442                         TPACPI_DESC, TPACPI_VERSION);
1443 }
1444
1445 static DRIVER_ATTR(version, S_IRUGO,
1446                 tpacpi_driver_version_show, NULL);
1447
1448 /* --------------------------------------------------------------------- */
1449
1450 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
1451
1452 /* wlsw_emulstate ------------------------------------------------------ */
1453 static ssize_t tpacpi_driver_wlsw_emulstate_show(struct device_driver *drv,
1454                                                 char *buf)
1455 {
1456         return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_wlsw_emulstate);
1457 }
1458
1459 static ssize_t tpacpi_driver_wlsw_emulstate_store(struct device_driver *drv,
1460                                                 const char *buf, size_t count)
1461 {
1462         unsigned long t;
1463
1464         if (parse_strtoul(buf, 1, &t))
1465                 return -EINVAL;
1466
1467         if (tpacpi_wlsw_emulstate != !!t) {
1468                 tpacpi_wlsw_emulstate = !!t;
1469                 tpacpi_rfk_update_hwblock_state(!t);    /* negative logic */
1470         }
1471
1472         return count;
1473 }
1474
1475 static DRIVER_ATTR(wlsw_emulstate, S_IWUSR | S_IRUGO,
1476                 tpacpi_driver_wlsw_emulstate_show,
1477                 tpacpi_driver_wlsw_emulstate_store);
1478
1479 /* bluetooth_emulstate ------------------------------------------------- */
1480 static ssize_t tpacpi_driver_bluetooth_emulstate_show(
1481                                         struct device_driver *drv,
1482                                         char *buf)
1483 {
1484         return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_bluetooth_emulstate);
1485 }
1486
1487 static ssize_t tpacpi_driver_bluetooth_emulstate_store(
1488                                         struct device_driver *drv,
1489                                         const char *buf, size_t count)
1490 {
1491         unsigned long t;
1492
1493         if (parse_strtoul(buf, 1, &t))
1494                 return -EINVAL;
1495
1496         tpacpi_bluetooth_emulstate = !!t;
1497
1498         return count;
1499 }
1500
1501 static DRIVER_ATTR(bluetooth_emulstate, S_IWUSR | S_IRUGO,
1502                 tpacpi_driver_bluetooth_emulstate_show,
1503                 tpacpi_driver_bluetooth_emulstate_store);
1504
1505 /* wwan_emulstate ------------------------------------------------- */
1506 static ssize_t tpacpi_driver_wwan_emulstate_show(
1507                                         struct device_driver *drv,
1508                                         char *buf)
1509 {
1510         return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_wwan_emulstate);
1511 }
1512
1513 static ssize_t tpacpi_driver_wwan_emulstate_store(
1514                                         struct device_driver *drv,
1515                                         const char *buf, size_t count)
1516 {
1517         unsigned long t;
1518
1519         if (parse_strtoul(buf, 1, &t))
1520                 return -EINVAL;
1521
1522         tpacpi_wwan_emulstate = !!t;
1523
1524         return count;
1525 }
1526
1527 static DRIVER_ATTR(wwan_emulstate, S_IWUSR | S_IRUGO,
1528                 tpacpi_driver_wwan_emulstate_show,
1529                 tpacpi_driver_wwan_emulstate_store);
1530
1531 /* uwb_emulstate ------------------------------------------------- */
1532 static ssize_t tpacpi_driver_uwb_emulstate_show(
1533                                         struct device_driver *drv,
1534                                         char *buf)
1535 {
1536         return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_uwb_emulstate);
1537 }
1538
1539 static ssize_t tpacpi_driver_uwb_emulstate_store(
1540                                         struct device_driver *drv,
1541                                         const char *buf, size_t count)
1542 {
1543         unsigned long t;
1544
1545         if (parse_strtoul(buf, 1, &t))
1546                 return -EINVAL;
1547
1548         tpacpi_uwb_emulstate = !!t;
1549
1550         return count;
1551 }
1552
1553 static DRIVER_ATTR(uwb_emulstate, S_IWUSR | S_IRUGO,
1554                 tpacpi_driver_uwb_emulstate_show,
1555                 tpacpi_driver_uwb_emulstate_store);
1556 #endif
1557
1558 /* --------------------------------------------------------------------- */
1559
1560 static struct driver_attribute *tpacpi_driver_attributes[] = {
1561         &driver_attr_debug_level, &driver_attr_version,
1562         &driver_attr_interface_version,
1563 };
1564
1565 static int __init tpacpi_create_driver_attributes(struct device_driver *drv)
1566 {
1567         int i, res;
1568
1569         i = 0;
1570         res = 0;
1571         while (!res && i < ARRAY_SIZE(tpacpi_driver_attributes)) {
1572                 res = driver_create_file(drv, tpacpi_driver_attributes[i]);
1573                 i++;
1574         }
1575
1576 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
1577         if (!res && dbg_wlswemul)
1578                 res = driver_create_file(drv, &driver_attr_wlsw_emulstate);
1579         if (!res && dbg_bluetoothemul)
1580                 res = driver_create_file(drv, &driver_attr_bluetooth_emulstate);
1581         if (!res && dbg_wwanemul)
1582                 res = driver_create_file(drv, &driver_attr_wwan_emulstate);
1583         if (!res && dbg_uwbemul)
1584                 res = driver_create_file(drv, &driver_attr_uwb_emulstate);
1585 #endif
1586
1587         return res;
1588 }
1589
1590 static void tpacpi_remove_driver_attributes(struct device_driver *drv)
1591 {
1592         int i;
1593
1594         for (i = 0; i < ARRAY_SIZE(tpacpi_driver_attributes); i++)
1595                 driver_remove_file(drv, tpacpi_driver_attributes[i]);
1596
1597 #ifdef THINKPAD_ACPI_DEBUGFACILITIES
1598         driver_remove_file(drv, &driver_attr_wlsw_emulstate);
1599         driver_remove_file(drv, &driver_attr_bluetooth_emulstate);
1600         driver_remove_file(drv, &driver_attr_wwan_emulstate);
1601         driver_remove_file(drv, &driver_attr_uwb_emulstate);
1602 #endif
1603 }
1604
1605 /*************************************************************************
1606  * Firmware Data
1607  */
1608
1609 /*
1610  * Table of recommended minimum BIOS versions
1611  *
1612  * Reasons for listing:
1613  *    1. Stable BIOS, listed because the unknown ammount of
1614  *       bugs and bad ACPI behaviour on older versions
1615  *
1616  *    2. BIOS or EC fw with known bugs that trigger on Linux
1617  *
1618  *    3. BIOS with known reduced functionality in older versions
1619  *
1620  *  We recommend the latest BIOS and EC version.
1621  *  We only support the latest BIOS and EC fw version as a rule.
1622  *
1623  *  Sources: IBM ThinkPad Public Web Documents (update changelogs),
1624  *  Information from users in ThinkWiki
1625  *
1626  *  WARNING: we use this table also to detect that the machine is
1627  *  a ThinkPad in some cases, so don't remove entries lightly.
1628  */
1629
1630 #define TPV_Q(__v, __id1, __id2, __bv1, __bv2)          \
1631         { .vendor       = (__v),                        \
1632           .bios         = TPID(__id1, __id2),           \
1633           .ec           = TPACPI_MATCH_ANY,             \
1634           .quirks       = TPACPI_MATCH_ANY << 16        \
1635                           | (__bv1) << 8 | (__bv2) }
1636
1637 #define TPV_Q_X(__v, __bid1, __bid2, __bv1, __bv2,      \
1638                 __eid1, __eid2, __ev1, __ev2)           \
1639         { .vendor       = (__v),                        \
1640           .bios         = TPID(__bid1, __bid2),         \
1641           .ec           = TPID(__eid1, __eid2),         \
1642           .quirks       = (__ev1) << 24 | (__ev2) << 16 \
1643                           | (__bv1) << 8 | (__bv2) }
1644
1645 #define TPV_QI0(__id1, __id2, __bv1, __bv2) \
1646         TPV_Q(PCI_VENDOR_ID_IBM, __id1, __id2, __bv1, __bv2)
1647
1648 #define TPV_QI1(__id1, __id2, __bv1, __bv2, __ev1, __ev2) \
1649         TPV_Q_X(PCI_VENDOR_ID_IBM, __id1, __id2,        \
1650                 __bv1, __bv2, __id1, __id2, __ev1, __ev2)
1651
1652 #define TPV_QI2(__bid1, __bid2, __bv1, __bv2,           \
1653                 __eid1, __eid2, __ev1, __ev2)           \
1654         TPV_Q_X(PCI_VENDOR_ID_IBM, __bid1, __bid2,      \
1655                 __bv1, __bv2, __eid1, __eid2, __ev1, __ev2)
1656
1657 #define TPV_QL0(__id1, __id2, __bv1, __bv2) \
1658         TPV_Q(PCI_VENDOR_ID_LENOVO, __id1, __id2, __bv1, __bv2)
1659
1660 #define TPV_QL1(__id1, __id2, __bv1, __bv2, __ev1, __ev2) \
1661         TPV_Q_X(PCI_VENDOR_ID_LENOVO, __id1, __id2,     \
1662                 __bv1, __bv2, __id1, __id2, __ev1, __ev2)
1663
1664 #define TPV_QL2(__bid1, __bid2, __bv1, __bv2,           \
1665                 __eid1, __eid2, __ev1, __ev2)           \
1666         TPV_Q_X(PCI_VENDOR_ID_LENOVO, __bid1, __bid2,   \
1667                 __bv1, __bv2, __eid1, __eid2, __ev1, __ev2)
1668
1669 static const struct tpacpi_quirk tpacpi_bios_version_qtable[] __initconst = {
1670         /*  Numeric models ------------------ */
1671         /*      FW MODEL   BIOS VERS          */
1672         TPV_QI0('I', 'M',  '6', '5'),            /* 570 */
1673         TPV_QI0('I', 'U',  '2', '6'),            /* 570E */
1674         TPV_QI0('I', 'B',  '5', '4'),            /* 600 */
1675         TPV_QI0('I', 'H',  '4', '7'),            /* 600E */
1676         TPV_QI0('I', 'N',  '3', '6'),            /* 600E */
1677         TPV_QI0('I', 'T',  '5', '5'),            /* 600X */
1678         TPV_QI0('I', 'D',  '4', '8'),            /* 770, 770E, 770ED */
1679         TPV_QI0('I', 'I',  '4', '2'),            /* 770X */
1680         TPV_QI0('I', 'O',  '2', '3'),            /* 770Z */
1681
1682         /* A-series ------------------------- */
1683         /*      FW MODEL   BIOS VERS  EC VERS */
1684         TPV_QI0('I', 'W',  '5', '9'),            /* A20m */
1685         TPV_QI0('I', 'V',  '6', '9'),            /* A20p */
1686         TPV_QI0('1', '0',  '2', '6'),            /* A21e, A22e */
1687         TPV_QI0('K', 'U',  '3', '6'),            /* A21e */
1688         TPV_QI0('K', 'X',  '3', '6'),            /* A21m, A22m */
1689         TPV_QI0('K', 'Y',  '3', '8'),            /* A21p, A22p */
1690         TPV_QI0('1', 'B',  '1', '7'),            /* A22e */
1691         TPV_QI0('1', '3',  '2', '0'),            /* A22m */
1692         TPV_QI0('1', 'E',  '7', '3'),            /* A30/p (0) */
1693         TPV_QI1('1', 'G',  '4', '1',  '1', '7'), /* A31/p (0) */
1694         TPV_QI1('1', 'N',  '1', '6',  '0', '7'), /* A31/p (0) */
1695
1696         /* G-series ------------------------- */
1697         /*      FW MODEL   BIOS VERS          */
1698         TPV_QI0('1', 'T',  'A', '6'),            /* G40 */
1699         TPV_QI0('1', 'X',  '5', '7'),            /* G41 */
1700
1701         /* R-series, T-series --------------- */
1702         /*      FW MODEL   BIOS VERS  EC VERS */
1703         TPV_QI0('1', 'C',  'F', '0'),            /* R30 */
1704         TPV_QI0('1', 'F',  'F', '1'),            /* R31 */
1705         TPV_QI0('1', 'M',  '9', '7'),            /* R32 */
1706         TPV_QI0('1', 'O',  '6', '1'),            /* R40 */
1707         TPV_QI0('1', 'P',  '6', '5'),            /* R40 */
1708         TPV_QI0('1', 'S',  '7', '0'),            /* R40e */
1709         TPV_QI1('1', 'R',  'D', 'R',  '7', '1'), /* R50/p, R51,
1710                                                     T40/p, T41/p, T42/p (1) */
1711         TPV_QI1('1', 'V',  '7', '1',  '2', '8'), /* R50e, R51 (1) */
1712         TPV_QI1('7', '8',  '7', '1',  '0', '6'), /* R51e (1) */
1713         TPV_QI1('7', '6',  '6', '9',  '1', '6'), /* R52 (1) */
1714         TPV_QI1('7', '0',  '6', '9',  '2', '8'), /* R52, T43 (1) */
1715
1716         TPV_QI0('I', 'Y',  '6', '1'),            /* T20 */
1717         TPV_QI0('K', 'Z',  '3', '4'),            /* T21 */
1718         TPV_QI0('1', '6',  '3', '2'),            /* T22 */
1719         TPV_QI1('1', 'A',  '6', '4',  '2', '3'), /* T23 (0) */
1720         TPV_QI1('1', 'I',  '7', '1',  '2', '0'), /* T30 (0) */
1721         TPV_QI1('1', 'Y',  '6', '5',  '2', '9'), /* T43/p (1) */
1722
1723         TPV_QL1('7', '9',  'E', '3',  '5', '0'), /* T60/p */
1724         TPV_QL1('7', 'C',  'D', '2',  '2', '2'), /* R60, R60i */
1725         TPV_QL0('7', 'E',  'D', '0'),            /* R60e, R60i */
1726
1727         /*      BIOS FW    BIOS VERS  EC FW     EC VERS */
1728         TPV_QI2('1', 'W',  '9', '0',  '1', 'V', '2', '8'), /* R50e (1) */
1729         TPV_QL2('7', 'I',  '3', '4',  '7', '9', '5', '0'), /* T60/p wide */
1730
1731         /* X-series ------------------------- */
1732         /*      FW MODEL   BIOS VERS  EC VERS */
1733         TPV_QI0('I', 'Z',  '9', 'D'),            /* X20, X21 */
1734         TPV_QI0('1', 'D',  '7', '0'),            /* X22, X23, X24 */
1735         TPV_QI1('1', 'K',  '4', '8',  '1', '8'), /* X30 (0) */
1736         TPV_QI1('1', 'Q',  '9', '7',  '2', '3'), /* X31, X32 (0) */
1737         TPV_QI1('1', 'U',  'D', '3',  'B', '2'), /* X40 (0) */
1738         TPV_QI1('7', '4',  '6', '4',  '2', '7'), /* X41 (0) */
1739         TPV_QI1('7', '5',  '6', '0',  '2', '0'), /* X41t (0) */
1740
1741         TPV_QL0('7', 'B',  'D', '7'),            /* X60/s */
1742         TPV_QL0('7', 'J',  '3', '0'),            /* X60t */
1743
1744         /* (0) - older versions lack DMI EC fw string and functionality */
1745         /* (1) - older versions known to lack functionality */
1746 };
1747
1748 #undef TPV_QL1
1749 #undef TPV_QL0
1750 #undef TPV_QI2
1751 #undef TPV_QI1
1752 #undef TPV_QI0
1753 #undef TPV_Q_X
1754 #undef TPV_Q
1755
1756 static void __init tpacpi_check_outdated_fw(void)
1757 {
1758         unsigned long fwvers;
1759         u16 ec_version, bios_version;
1760
1761         fwvers = tpacpi_check_quirks(tpacpi_bios_version_qtable,
1762                                 ARRAY_SIZE(tpacpi_bios_version_qtable));
1763
1764         if (!fwvers)
1765                 return;
1766
1767         bios_version = fwvers & 0xffffU;
1768         ec_version = (fwvers >> 16) & 0xffffU;
1769
1770         /* note that unknown versions are set to 0x0000 and we use that */
1771         if ((bios_version > thinkpad_id.bios_release) ||
1772             (ec_version > thinkpad_id.ec_release &&
1773                                 ec_version != TPACPI_MATCH_ANY)) {
1774                 /*
1775                  * The changelogs would let us track down the exact
1776                  * reason, but it is just too much of a pain to track
1777                  * it.  We only list BIOSes that are either really
1778                  * broken, or really stable to begin with, so it is
1779                  * best if the user upgrades the firmware anyway.
1780                  */
1781                 printk(TPACPI_WARN
1782                         "WARNING: Outdated ThinkPad BIOS/EC firmware\n");
1783                 printk(TPACPI_WARN
1784                         "WARNING: This firmware may be missing critical bug "
1785                         "fixes and/or important features\n");
1786         }
1787 }
1788
1789 static bool __init tpacpi_is_fw_known(void)
1790 {
1791         return tpacpi_check_quirks(tpacpi_bios_version_qtable,
1792                         ARRAY_SIZE(tpacpi_bios_version_qtable)) != 0;
1793 }
1794
1795 /****************************************************************************
1796  ****************************************************************************
1797  *
1798  * Subdrivers
1799  *
1800  ****************************************************************************
1801  ****************************************************************************/
1802
1803 /*************************************************************************
1804  * thinkpad-acpi init subdriver
1805  */
1806
1807 static int __init thinkpad_acpi_driver_init(struct ibm_init_struct *iibm)
1808 {
1809         printk(TPACPI_INFO "%s v%s\n", TPACPI_DESC, TPACPI_VERSION);
1810         printk(TPACPI_INFO "%s\n", TPACPI_URL);
1811
1812         printk(TPACPI_INFO "ThinkPad BIOS %s, EC %s\n",
1813                 (thinkpad_id.bios_version_str) ?
1814                         thinkpad_id.bios_version_str : "unknown",
1815                 (thinkpad_id.ec_version_str) ?
1816                         thinkpad_id.ec_version_str : "unknown");
1817
1818         if (thinkpad_id.vendor && thinkpad_id.model_str)
1819                 printk(TPACPI_INFO "%s %s, model %s\n",
1820                         (thinkpad_id.vendor == PCI_VENDOR_ID_IBM) ?
1821                                 "IBM" : ((thinkpad_id.vendor ==
1822                                                 PCI_VENDOR_ID_LENOVO) ?
1823                                         "Lenovo" : "Unknown vendor"),
1824                         thinkpad_id.model_str,
1825                         (thinkpad_id.nummodel_str) ?
1826                                 thinkpad_id.nummodel_str : "unknown");
1827
1828         tpacpi_check_outdated_fw();
1829         return 0;
1830 }
1831
1832 static int thinkpad_acpi_driver_read(char *p)
1833 {
1834         int len = 0;
1835
1836         len += sprintf(p + len, "driver:\t\t%s\n", TPACPI_DESC);
1837         len += sprintf(p + len, "version:\t%s\n", TPACPI_VERSION);
1838
1839         return len;
1840 }
1841
1842 static struct ibm_struct thinkpad_acpi_driver_data = {
1843         .name = "driver",
1844         .read = thinkpad_acpi_driver_read,
1845 };
1846
1847 /*************************************************************************
1848  * Hotkey subdriver
1849  */
1850
1851 enum {  /* hot key scan codes (derived from ACPI DSDT) */
1852         TP_ACPI_HOTKEYSCAN_FNF1         = 0,
1853         TP_ACPI_HOTKEYSCAN_FNF2,
1854         TP_ACPI_HOTKEYSCAN_FNF3,
1855         TP_ACPI_HOTKEYSCAN_FNF4,
1856         TP_ACPI_HOTKEYSCAN_FNF5,
1857         TP_ACPI_HOTKEYSCAN_FNF6,
1858         TP_ACPI_HOTKEYSCAN_FNF7,
1859         TP_ACPI_HOTKEYSCAN_FNF8,
1860         TP_ACPI_HOTKEYSCAN_FNF9,
1861         TP_ACPI_HOTKEYSCAN_FNF10,
1862         TP_ACPI_HOTKEYSCAN_FNF11,
1863         TP_ACPI_HOTKEYSCAN_FNF12,
1864         TP_ACPI_HOTKEYSCAN_FNBACKSPACE,
1865         TP_ACPI_HOTKEYSCAN_FNINSERT,
1866         TP_ACPI_HOTKEYSCAN_FNDELETE,
1867         TP_ACPI_HOTKEYSCAN_FNHOME,
1868         TP_ACPI_HOTKEYSCAN_FNEND,
1869         TP_ACPI_HOTKEYSCAN_FNPAGEUP,
1870         TP_ACPI_HOTKEYSCAN_FNPAGEDOWN,
1871         TP_ACPI_HOTKEYSCAN_FNSPACE,
1872         TP_ACPI_HOTKEYSCAN_VOLUMEUP,
1873         TP_ACPI_HOTKEYSCAN_VOLUMEDOWN,
1874         TP_ACPI_HOTKEYSCAN_MUTE,
1875         TP_ACPI_HOTKEYSCAN_THINKPAD,
1876 };
1877
1878 enum {  /* Keys available through NVRAM polling */
1879         TPACPI_HKEY_NVRAM_KNOWN_MASK = 0x00fb88c0U,
1880         TPACPI_HKEY_NVRAM_GOOD_MASK  = 0x00fb8000U,
1881 };
1882
1883 enum {  /* Positions of some of the keys in hotkey masks */
1884         TP_ACPI_HKEY_DISPSWTCH_MASK     = 1 << TP_ACPI_HOTKEYSCAN_FNF7,
1885         TP_ACPI_HKEY_DISPXPAND_MASK     = 1 << TP_ACPI_HOTKEYSCAN_FNF8,
1886         TP_ACPI_HKEY_HIBERNATE_MASK     = 1 << TP_ACPI_HOTKEYSCAN_FNF12,
1887         TP_ACPI_HKEY_BRGHTUP_MASK       = 1 << TP_ACPI_HOTKEYSCAN_FNHOME,
1888         TP_ACPI_HKEY_BRGHTDWN_MASK      = 1 << TP_ACPI_HOTKEYSCAN_FNEND,
1889         TP_ACPI_HKEY_THNKLGHT_MASK      = 1 << TP_ACPI_HOTKEYSCAN_FNPAGEUP,
1890         TP_ACPI_HKEY_ZOOM_MASK          = 1 << TP_ACPI_HOTKEYSCAN_FNSPACE,
1891         TP_ACPI_HKEY_VOLUP_MASK         = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEUP,
1892         TP_ACPI_HKEY_VOLDWN_MASK        = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEDOWN,
1893         TP_ACPI_HKEY_MUTE_MASK          = 1 << TP_ACPI_HOTKEYSCAN_MUTE,
1894         TP_ACPI_HKEY_THINKPAD_MASK      = 1 << TP_ACPI_HOTKEYSCAN_THINKPAD,
1895 };
1896
1897 enum {  /* NVRAM to ACPI HKEY group map */
1898         TP_NVRAM_HKEY_GROUP_HK2         = TP_ACPI_HKEY_THINKPAD_MASK |
1899                                           TP_ACPI_HKEY_ZOOM_MASK |
1900                                           TP_ACPI_HKEY_DISPSWTCH_MASK |
1901                                           TP_ACPI_HKEY_HIBERNATE_MASK,
1902         TP_NVRAM_HKEY_GROUP_BRIGHTNESS  = TP_ACPI_HKEY_BRGHTUP_MASK |
1903                                           TP_ACPI_HKEY_BRGHTDWN_MASK,
1904         TP_NVRAM_HKEY_GROUP_VOLUME      = TP_ACPI_HKEY_VOLUP_MASK |
1905                                           TP_ACPI_HKEY_VOLDWN_MASK |
1906                                           TP_ACPI_HKEY_MUTE_MASK,
1907 };
1908
1909 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1910 struct tp_nvram_state {
1911        u16 thinkpad_toggle:1;
1912        u16 zoom_toggle:1;
1913        u16 display_toggle:1;
1914        u16 thinklight_toggle:1;
1915        u16 hibernate_toggle:1;
1916        u16 displayexp_toggle:1;
1917        u16 display_state:1;
1918        u16 brightness_toggle:1;
1919        u16 volume_toggle:1;
1920        u16 mute:1;
1921
1922        u8 brightness_level;
1923        u8 volume_level;
1924 };
1925
1926 /* kthread for the hotkey poller */
1927 static struct task_struct *tpacpi_hotkey_task;
1928
1929 /* Acquired while the poller kthread is running, use to sync start/stop */
1930 static struct mutex hotkey_thread_mutex;
1931
1932 /*
1933  * Acquire mutex to write poller control variables.
1934  * Increment hotkey_config_change when changing them.
1935  *
1936  * See HOTKEY_CONFIG_CRITICAL_START/HOTKEY_CONFIG_CRITICAL_END
1937  */
1938 static struct mutex hotkey_thread_data_mutex;
1939 static unsigned int hotkey_config_change;
1940
1941 /*
1942  * hotkey poller control variables
1943  *
1944  * Must be atomic or readers will also need to acquire mutex
1945  */
1946 static u32 hotkey_source_mask;          /* bit mask 0=ACPI,1=NVRAM */
1947 static unsigned int hotkey_poll_freq = 10; /* Hz */
1948
1949 #define HOTKEY_CONFIG_CRITICAL_START \
1950         do { \
1951                 mutex_lock(&hotkey_thread_data_mutex); \
1952                 hotkey_config_change++; \
1953         } while (0);
1954 #define HOTKEY_CONFIG_CRITICAL_END \
1955         mutex_unlock(&hotkey_thread_data_mutex);
1956
1957 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1958
1959 #define hotkey_source_mask 0U
1960 #define HOTKEY_CONFIG_CRITICAL_START
1961 #define HOTKEY_CONFIG_CRITICAL_END
1962
1963 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1964
1965 static struct mutex hotkey_mutex;
1966
1967 static enum {   /* Reasons for waking up */
1968         TP_ACPI_WAKEUP_NONE = 0,        /* None or unknown */
1969         TP_ACPI_WAKEUP_BAYEJ,           /* Bay ejection request */
1970         TP_ACPI_WAKEUP_UNDOCK,          /* Undock request */
1971 } hotkey_wakeup_reason;
1972
1973 static int hotkey_autosleep_ack;
1974
1975 static u32 hotkey_orig_mask;
1976 static u32 hotkey_all_mask;
1977 static u32 hotkey_reserved_mask;
1978 static u32 hotkey_mask;
1979
1980 static unsigned int hotkey_report_mode;
1981
1982 static u16 *hotkey_keycode_map;
1983
1984 static struct attribute_set *hotkey_dev_attributes;
1985
1986 /* HKEY.MHKG() return bits */
1987 #define TP_HOTKEY_TABLET_MASK (1 << 3)
1988
1989 static int hotkey_get_wlsw(void)
1990 {
1991         int status;
1992
1993         if (!tp_features.hotkey_wlsw)
1994                 return -ENODEV;
1995
1996 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
1997         if (dbg_wlswemul)
1998                 return (tpacpi_wlsw_emulstate) ?
1999                                 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
2000 #endif
2001
2002         if (!acpi_evalf(hkey_handle, &status, "WLSW", "d"))
2003                 return -EIO;
2004
2005         return (status) ? TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
2006 }
2007
2008 static int hotkey_get_tablet_mode(int *status)
2009 {
2010         int s;
2011
2012         if (!acpi_evalf(hkey_handle, &s, "MHKG", "d"))
2013                 return -EIO;
2014
2015         *status = ((s & TP_HOTKEY_TABLET_MASK) != 0);
2016         return 0;
2017 }
2018
2019 /*
2020  * Call with hotkey_mutex held
2021  */
2022 static int hotkey_mask_get(void)
2023 {
2024         u32 m = 0;
2025
2026         if (tp_features.hotkey_mask) {
2027                 if (!acpi_evalf(hkey_handle, &m, "DHKN", "d"))
2028                         return -EIO;
2029         }
2030         HOTKEY_CONFIG_CRITICAL_START
2031         hotkey_mask = m | (hotkey_source_mask & hotkey_mask);
2032         HOTKEY_CONFIG_CRITICAL_END
2033
2034         return 0;
2035 }
2036
2037 /*
2038  * Call with hotkey_mutex held
2039  */
2040 static int hotkey_mask_set(u32 mask)
2041 {
2042         int i;
2043         int rc = 0;
2044
2045         if (tp_features.hotkey_mask) {
2046                 if (!tp_warned.hotkey_mask_ff &&
2047                     (mask == 0xffff || mask == 0xffffff ||
2048                      mask == 0xffffffff)) {
2049                         tp_warned.hotkey_mask_ff = 1;
2050                         printk(TPACPI_NOTICE
2051                                "setting the hotkey mask to 0x%08x is likely "
2052                                "not the best way to go about it\n", mask);
2053                         printk(TPACPI_NOTICE
2054                                "please consider using the driver defaults, "
2055                                "and refer to up-to-date thinkpad-acpi "
2056                                "documentation\n");
2057                 }
2058
2059                 HOTKEY_CONFIG_CRITICAL_START
2060                 for (i = 0; i < 32; i++) {
2061                         u32 m = 1 << i;
2062                         /* enable in firmware mask only keys not in NVRAM
2063                          * mode, but enable the key in the cached hotkey_mask
2064                          * regardless of mode, or the key will end up
2065                          * disabled by hotkey_mask_get() */
2066                         if (!acpi_evalf(hkey_handle,
2067                                         NULL, "MHKM", "vdd", i + 1,
2068                                         !!((mask & ~hotkey_source_mask) & m))) {
2069                                 rc = -EIO;
2070                                 break;
2071                         } else {
2072                                 hotkey_mask = (hotkey_mask & ~m) | (mask & m);
2073                         }
2074                 }
2075                 HOTKEY_CONFIG_CRITICAL_END
2076
2077                 /* hotkey_mask_get must be called unconditionally below */
2078                 if (!hotkey_mask_get() && !rc &&
2079                     (hotkey_mask & ~hotkey_source_mask) !=
2080                      (mask & ~hotkey_source_mask)) {
2081                         printk(TPACPI_NOTICE
2082                                "requested hot key mask 0x%08x, but "
2083                                "firmware forced it to 0x%08x\n",
2084                                mask, hotkey_mask);
2085                 }
2086         } else {
2087 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2088                 HOTKEY_CONFIG_CRITICAL_START
2089                 hotkey_mask = mask & hotkey_source_mask;
2090                 HOTKEY_CONFIG_CRITICAL_END
2091                 hotkey_mask_get();
2092                 if (hotkey_mask != mask) {
2093                         printk(TPACPI_NOTICE
2094                                "requested hot key mask 0x%08x, "
2095                                "forced to 0x%08x (NVRAM poll mask is "
2096                                "0x%08x): no firmware mask support\n",
2097                                mask, hotkey_mask, hotkey_source_mask);
2098                 }
2099 #else
2100                 hotkey_mask_get();
2101                 rc = -ENXIO;
2102 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2103         }
2104
2105         return rc;
2106 }
2107
2108 static int hotkey_status_get(int *status)
2109 {
2110         if (!acpi_evalf(hkey_handle, status, "DHKC", "d"))
2111                 return -EIO;
2112
2113         return 0;
2114 }
2115
2116 static int hotkey_status_set(bool enable)
2117 {
2118         if (!acpi_evalf(hkey_handle, NULL, "MHKC", "vd", enable ? 1 : 0))
2119                 return -EIO;
2120
2121         return 0;
2122 }
2123
2124 static void tpacpi_input_send_tabletsw(void)
2125 {
2126         int state;
2127
2128         if (tp_features.hotkey_tablet &&
2129             !hotkey_get_tablet_mode(&state)) {
2130                 mutex_lock(&tpacpi_inputdev_send_mutex);
2131
2132                 input_report_switch(tpacpi_inputdev,
2133                                     SW_TABLET_MODE, !!state);
2134                 input_sync(tpacpi_inputdev);
2135
2136                 mutex_unlock(&tpacpi_inputdev_send_mutex);
2137         }
2138 }
2139
2140 static void tpacpi_input_send_key(unsigned int scancode)
2141 {
2142         unsigned int keycode;
2143
2144         keycode = hotkey_keycode_map[scancode];
2145
2146         if (keycode != KEY_RESERVED) {
2147                 mutex_lock(&tpacpi_inputdev_send_mutex);
2148
2149                 input_report_key(tpacpi_inputdev, keycode, 1);
2150                 if (keycode == KEY_UNKNOWN)
2151                         input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN,
2152                                     scancode);
2153                 input_sync(tpacpi_inputdev);
2154
2155                 input_report_key(tpacpi_inputdev, keycode, 0);
2156                 if (keycode == KEY_UNKNOWN)
2157                         input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN,
2158                                     scancode);
2159                 input_sync(tpacpi_inputdev);
2160
2161                 mutex_unlock(&tpacpi_inputdev_send_mutex);
2162         }
2163 }
2164
2165 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2166 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver;
2167
2168 static void tpacpi_hotkey_send_key(unsigned int scancode)
2169 {
2170         tpacpi_input_send_key(scancode);
2171         if (hotkey_report_mode < 2) {
2172                 acpi_bus_generate_proc_event(ibm_hotkey_acpidriver.device,
2173                                                 0x80, 0x1001 + scancode);
2174         }
2175 }
2176
2177 static void hotkey_read_nvram(struct tp_nvram_state *n, u32 m)
2178 {
2179         u8 d;
2180
2181         if (m & TP_NVRAM_HKEY_GROUP_HK2) {
2182                 d = nvram_read_byte(TP_NVRAM_ADDR_HK2);
2183                 n->thinkpad_toggle = !!(d & TP_NVRAM_MASK_HKT_THINKPAD);
2184                 n->zoom_toggle = !!(d & TP_NVRAM_MASK_HKT_ZOOM);
2185                 n->display_toggle = !!(d & TP_NVRAM_MASK_HKT_DISPLAY);
2186                 n->hibernate_toggle = !!(d & TP_NVRAM_MASK_HKT_HIBERNATE);
2187         }
2188         if (m & TP_ACPI_HKEY_THNKLGHT_MASK) {
2189                 d = nvram_read_byte(TP_NVRAM_ADDR_THINKLIGHT);
2190                 n->thinklight_toggle = !!(d & TP_NVRAM_MASK_THINKLIGHT);
2191         }
2192         if (m & TP_ACPI_HKEY_DISPXPAND_MASK) {
2193                 d = nvram_read_byte(TP_NVRAM_ADDR_VIDEO);
2194                 n->displayexp_toggle =
2195                                 !!(d & TP_NVRAM_MASK_HKT_DISPEXPND);
2196         }
2197         if (m & TP_NVRAM_HKEY_GROUP_BRIGHTNESS) {
2198                 d = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS);
2199                 n->brightness_level = (d & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
2200                                 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
2201                 n->brightness_toggle =
2202                                 !!(d & TP_NVRAM_MASK_HKT_BRIGHTNESS);
2203         }
2204         if (m & TP_NVRAM_HKEY_GROUP_VOLUME) {
2205                 d = nvram_read_byte(TP_NVRAM_ADDR_MIXER);
2206                 n->volume_level = (d & TP_NVRAM_MASK_LEVEL_VOLUME)
2207                                 >> TP_NVRAM_POS_LEVEL_VOLUME;
2208                 n->mute = !!(d & TP_NVRAM_MASK_MUTE);
2209                 n->volume_toggle = !!(d & TP_NVRAM_MASK_HKT_VOLUME);
2210         }
2211 }
2212
2213 #define TPACPI_COMPARE_KEY(__scancode, __member) \
2214         do { \
2215                 if ((mask & (1 << __scancode)) && \
2216                     oldn->__member != newn->__member) \
2217                 tpacpi_hotkey_send_key(__scancode); \
2218         } while (0)
2219
2220 #define TPACPI_MAY_SEND_KEY(__scancode) \
2221         do { if (mask & (1 << __scancode)) \
2222                 tpacpi_hotkey_send_key(__scancode); } while (0)
2223
2224 static void hotkey_compare_and_issue_event(struct tp_nvram_state *oldn,
2225                                            struct tp_nvram_state *newn,
2226                                            u32 mask)
2227 {
2228         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_THINKPAD, thinkpad_toggle);
2229         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNSPACE, zoom_toggle);
2230         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF7, display_toggle);
2231         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF12, hibernate_toggle);
2232
2233         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNPAGEUP, thinklight_toggle);
2234
2235         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF8, displayexp_toggle);
2236
2237         /* handle volume */
2238         if (oldn->volume_toggle != newn->volume_toggle) {
2239                 if (oldn->mute != newn->mute) {
2240                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE);
2241                 }
2242                 if (oldn->volume_level > newn->volume_level) {
2243                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
2244                 } else if (oldn->volume_level < newn->volume_level) {
2245                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
2246                 } else if (oldn->mute == newn->mute) {
2247                         /* repeated key presses that didn't change state */
2248                         if (newn->mute) {
2249                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE);
2250                         } else if (newn->volume_level != 0) {
2251                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
2252                         } else {
2253                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
2254                         }
2255                 }
2256         }
2257
2258         /* handle brightness */
2259         if (oldn->brightness_toggle != newn->brightness_toggle) {
2260                 if (oldn->brightness_level < newn->brightness_level) {
2261                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
2262                 } else if (oldn->brightness_level > newn->brightness_level) {
2263                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
2264                 } else {
2265                         /* repeated key presses that didn't change state */
2266                         if (newn->brightness_level != 0) {
2267                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
2268                         } else {
2269                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
2270                         }
2271                 }
2272         }
2273 }
2274
2275 #undef TPACPI_COMPARE_KEY
2276 #undef TPACPI_MAY_SEND_KEY
2277
2278 static int hotkey_kthread(void *data)
2279 {
2280         struct tp_nvram_state s[2];
2281         u32 mask;
2282         unsigned int si, so;
2283         unsigned long t;
2284         unsigned int change_detector, must_reset;
2285         unsigned int poll_freq;
2286
2287         mutex_lock(&hotkey_thread_mutex);
2288
2289         if (tpacpi_lifecycle == TPACPI_LIFE_EXITING)
2290                 goto exit;
2291
2292         set_freezable();
2293
2294         so = 0;
2295         si = 1;
2296         t = 0;
2297
2298         /* Initial state for compares */
2299         mutex_lock(&hotkey_thread_data_mutex);
2300         change_detector = hotkey_config_change;
2301         mask = hotkey_source_mask & hotkey_mask;
2302         poll_freq = hotkey_poll_freq;
2303         mutex_unlock(&hotkey_thread_data_mutex);
2304         hotkey_read_nvram(&s[so], mask);
2305
2306         while (!kthread_should_stop()) {
2307                 if (t == 0) {
2308                         if (likely(poll_freq))
2309                                 t = 1000/poll_freq;
2310                         else
2311                                 t = 100;        /* should never happen... */
2312                 }
2313                 t = msleep_interruptible(t);
2314                 if (unlikely(kthread_should_stop()))
2315                         break;
2316                 must_reset = try_to_freeze();
2317                 if (t > 0 && !must_reset)
2318                         continue;
2319
2320                 mutex_lock(&hotkey_thread_data_mutex);
2321                 if (must_reset || hotkey_config_change != change_detector) {
2322                         /* forget old state on thaw or config change */
2323                         si = so;
2324                         t = 0;
2325                         change_detector = hotkey_config_change;
2326                 }
2327                 mask = hotkey_source_mask & hotkey_mask;
2328                 poll_freq = hotkey_poll_freq;
2329                 mutex_unlock(&hotkey_thread_data_mutex);
2330
2331                 if (likely(mask)) {
2332                         hotkey_read_nvram(&s[si], mask);
2333                         if (likely(si != so)) {
2334                                 hotkey_compare_and_issue_event(&s[so], &s[si],
2335                                                                 mask);
2336                         }
2337                 }
2338
2339                 so = si;
2340                 si ^= 1;
2341         }
2342
2343 exit:
2344         mutex_unlock(&hotkey_thread_mutex);
2345         return 0;
2346 }
2347
2348 /* call with hotkey_mutex held */
2349 static void hotkey_poll_stop_sync(void)
2350 {
2351         if (tpacpi_hotkey_task) {
2352                 if (frozen(tpacpi_hotkey_task) ||
2353                     freezing(tpacpi_hotkey_task))
2354                         thaw_process(tpacpi_hotkey_task);
2355
2356                 kthread_stop(tpacpi_hotkey_task);
2357                 tpacpi_hotkey_task = NULL;
2358                 mutex_lock(&hotkey_thread_mutex);
2359                 /* at this point, the thread did exit */
2360                 mutex_unlock(&hotkey_thread_mutex);
2361         }
2362 }
2363
2364 /* call with hotkey_mutex held */
2365 static void hotkey_poll_setup(bool may_warn)
2366 {
2367         u32 hotkeys_to_poll = hotkey_source_mask & hotkey_mask;
2368
2369         if (hotkeys_to_poll != 0 && hotkey_poll_freq > 0 &&
2370             (tpacpi_inputdev->users > 0 || hotkey_report_mode < 2)) {
2371                 if (!tpacpi_hotkey_task) {
2372                         tpacpi_hotkey_task = kthread_run(hotkey_kthread,
2373                                         NULL, TPACPI_NVRAM_KTHREAD_NAME);
2374                         if (IS_ERR(tpacpi_hotkey_task)) {
2375                                 tpacpi_hotkey_task = NULL;
2376                                 printk(TPACPI_ERR
2377                                        "could not create kernel thread "
2378                                        "for hotkey polling\n");
2379                         }
2380                 }
2381         } else {
2382                 hotkey_poll_stop_sync();
2383                 if (may_warn && hotkeys_to_poll != 0 &&
2384                     hotkey_poll_freq == 0) {
2385                         printk(TPACPI_NOTICE
2386                                 "hot keys 0x%08x require polling, "
2387                                 "which is currently disabled\n",
2388                                 hotkeys_to_poll);
2389                 }
2390         }
2391 }
2392
2393 static void hotkey_poll_setup_safe(bool may_warn)
2394 {
2395         mutex_lock(&hotkey_mutex);
2396         hotkey_poll_setup(may_warn);
2397         mutex_unlock(&hotkey_mutex);
2398 }
2399
2400 /* call with hotkey_mutex held */
2401 static void hotkey_poll_set_freq(unsigned int freq)
2402 {
2403         if (!freq)
2404                 hotkey_poll_stop_sync();
2405
2406         HOTKEY_CONFIG_CRITICAL_START
2407         hotkey_poll_freq = freq;
2408         HOTKEY_CONFIG_CRITICAL_END
2409 }
2410
2411 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2412
2413 static void hotkey_poll_setup_safe(bool __unused)
2414 {
2415 }
2416
2417 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2418
2419 static int hotkey_inputdev_open(struct input_dev *dev)
2420 {
2421         switch (tpacpi_lifecycle) {
2422         case TPACPI_LIFE_INIT:
2423                 /*
2424                  * hotkey_init will call hotkey_poll_setup_safe
2425                  * at the appropriate moment
2426                  */
2427                 return 0;
2428         case TPACPI_LIFE_EXITING:
2429                 return -EBUSY;
2430         case TPACPI_LIFE_RUNNING:
2431                 hotkey_poll_setup_safe(false);
2432                 return 0;
2433         }
2434
2435         /* Should only happen if tpacpi_lifecycle is corrupt */
2436         BUG();
2437         return -EBUSY;
2438 }
2439
2440 static void hotkey_inputdev_close(struct input_dev *dev)
2441 {
2442         /* disable hotkey polling when possible */
2443         if (tpacpi_lifecycle == TPACPI_LIFE_RUNNING)
2444                 hotkey_poll_setup_safe(false);
2445 }
2446
2447 /* sysfs hotkey enable ------------------------------------------------- */
2448 static ssize_t hotkey_enable_show(struct device *dev,
2449                            struct device_attribute *attr,
2450                            char *buf)
2451 {
2452         int res, status;
2453
2454         printk_deprecated_attribute("hotkey_enable",
2455                         "Hotkey reporting is always enabled");
2456
2457         res = hotkey_status_get(&status);
2458         if (res)
2459                 return res;
2460
2461         return snprintf(buf, PAGE_SIZE, "%d\n", status);
2462 }
2463
2464 static ssize_t hotkey_enable_store(struct device *dev,
2465                             struct device_attribute *attr,
2466                             const char *buf, size_t count)
2467 {
2468         unsigned long t;
2469
2470         printk_deprecated_attribute("hotkey_enable",
2471                         "Hotkeys can be disabled through hotkey_mask");
2472
2473         if (parse_strtoul(buf, 1, &t))
2474                 return -EINVAL;
2475
2476         if (t == 0)
2477                 return -EPERM;
2478
2479         return count;
2480 }
2481
2482 static struct device_attribute dev_attr_hotkey_enable =
2483         __ATTR(hotkey_enable, S_IWUSR | S_IRUGO,
2484                 hotkey_enable_show, hotkey_enable_store);
2485
2486 /* sysfs hotkey mask --------------------------------------------------- */
2487 static ssize_t hotkey_mask_show(struct device *dev,
2488                            struct device_attribute *attr,
2489                            char *buf)
2490 {
2491         int res;
2492
2493         if (mutex_lock_killable(&hotkey_mutex))
2494                 return -ERESTARTSYS;
2495         res = hotkey_mask_get();
2496         mutex_unlock(&hotkey_mutex);
2497
2498         return (res)?
2499                 res : snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_mask);
2500 }
2501
2502 static ssize_t hotkey_mask_store(struct device *dev,
2503                             struct device_attribute *attr,
2504                             const char *buf, size_t count)
2505 {
2506         unsigned long t;
2507         int res;
2508
2509         if (parse_strtoul(buf, 0xffffffffUL, &t))
2510                 return -EINVAL;
2511
2512         if (mutex_lock_killable(&hotkey_mutex))
2513                 return -ERESTARTSYS;
2514
2515         res = hotkey_mask_set(t);
2516
2517 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2518         hotkey_poll_setup(true);
2519 #endif
2520
2521         mutex_unlock(&hotkey_mutex);
2522
2523         tpacpi_disclose_usertask("hotkey_mask", "set to 0x%08lx\n", t);
2524
2525         return (res) ? res : count;
2526 }
2527
2528 static struct device_attribute dev_attr_hotkey_mask =
2529         __ATTR(hotkey_mask, S_IWUSR | S_IRUGO,
2530                 hotkey_mask_show, hotkey_mask_store);
2531
2532 /* sysfs hotkey bios_enabled ------------------------------------------- */
2533 static ssize_t hotkey_bios_enabled_show(struct device *dev,
2534                            struct device_attribute *attr,
2535                            char *buf)
2536 {
2537         return sprintf(buf, "0\n");
2538 }
2539
2540 static struct device_attribute dev_attr_hotkey_bios_enabled =
2541         __ATTR(hotkey_bios_enabled, S_IRUGO, hotkey_bios_enabled_show, NULL);
2542
2543 /* sysfs hotkey bios_mask ---------------------------------------------- */
2544 static ssize_t hotkey_bios_mask_show(struct device *dev,
2545                            struct device_attribute *attr,
2546                            char *buf)
2547 {
2548         printk_deprecated_attribute("hotkey_bios_mask",
2549                         "This attribute is useless.");
2550         return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_orig_mask);
2551 }
2552
2553 static struct device_attribute dev_attr_hotkey_bios_mask =
2554         __ATTR(hotkey_bios_mask, S_IRUGO, hotkey_bios_mask_show, NULL);
2555
2556 /* sysfs hotkey all_mask ----------------------------------------------- */
2557 static ssize_t hotkey_all_mask_show(struct device *dev,
2558                            struct device_attribute *attr,
2559                            char *buf)
2560 {
2561         return snprintf(buf, PAGE_SIZE, "0x%08x\n",
2562                                 hotkey_all_mask | hotkey_source_mask);
2563 }
2564
2565 static struct device_attribute dev_attr_hotkey_all_mask =
2566         __ATTR(hotkey_all_mask, S_IRUGO, hotkey_all_mask_show, NULL);
2567
2568 /* sysfs hotkey recommended_mask --------------------------------------- */
2569 static ssize_t hotkey_recommended_mask_show(struct device *dev,
2570                                             struct device_attribute *attr,
2571                                             char *buf)
2572 {
2573         return snprintf(buf, PAGE_SIZE, "0x%08x\n",
2574                         (hotkey_all_mask | hotkey_source_mask)
2575                         & ~hotkey_reserved_mask);
2576 }
2577
2578 static struct device_attribute dev_attr_hotkey_recommended_mask =
2579         __ATTR(hotkey_recommended_mask, S_IRUGO,
2580                 hotkey_recommended_mask_show, NULL);
2581
2582 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2583
2584 /* sysfs hotkey hotkey_source_mask ------------------------------------- */
2585 static ssize_t hotkey_source_mask_show(struct device *dev,
2586                            struct device_attribute *attr,
2587                            char *buf)
2588 {
2589         return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_source_mask);
2590 }
2591
2592 static ssize_t hotkey_source_mask_store(struct device *dev,
2593                             struct device_attribute *attr,
2594                             const char *buf, size_t count)
2595 {
2596         unsigned long t;
2597
2598         if (parse_strtoul(buf, 0xffffffffUL, &t) ||
2599                 ((t & ~TPACPI_HKEY_NVRAM_KNOWN_MASK) != 0))
2600                 return -EINVAL;
2601
2602         if (mutex_lock_killable(&hotkey_mutex))
2603                 return -ERESTARTSYS;
2604
2605         HOTKEY_CONFIG_CRITICAL_START
2606         hotkey_source_mask = t;
2607         HOTKEY_CONFIG_CRITICAL_END
2608
2609         hotkey_poll_setup(true);
2610         hotkey_mask_set(hotkey_mask);
2611
2612         mutex_unlock(&hotkey_mutex);
2613
2614         tpacpi_disclose_usertask("hotkey_source_mask", "set to 0x%08lx\n", t);
2615
2616         return count;
2617 }
2618
2619 static struct device_attribute dev_attr_hotkey_source_mask =
2620         __ATTR(hotkey_source_mask, S_IWUSR | S_IRUGO,
2621                 hotkey_source_mask_show, hotkey_source_mask_store);
2622
2623 /* sysfs hotkey hotkey_poll_freq --------------------------------------- */
2624 static ssize_t hotkey_poll_freq_show(struct device *dev,
2625                            struct device_attribute *attr,
2626                            char *buf)
2627 {
2628         return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_poll_freq);
2629 }
2630
2631 static ssize_t hotkey_poll_freq_store(struct device *dev,
2632                             struct device_attribute *attr,
2633                             const char *buf, size_t count)
2634 {
2635         unsigned long t;
2636
2637         if (parse_strtoul(buf, 25, &t))
2638                 return -EINVAL;
2639
2640         if (mutex_lock_killable(&hotkey_mutex))
2641                 return -ERESTARTSYS;
2642
2643         hotkey_poll_set_freq(t);
2644         hotkey_poll_setup(true);
2645
2646         mutex_unlock(&hotkey_mutex);
2647
2648         tpacpi_disclose_usertask("hotkey_poll_freq", "set to %lu\n", t);
2649
2650         return count;
2651 }
2652
2653 static struct device_attribute dev_attr_hotkey_poll_freq =
2654         __ATTR(hotkey_poll_freq, S_IWUSR | S_IRUGO,
2655                 hotkey_poll_freq_show, hotkey_poll_freq_store);
2656
2657 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2658
2659 /* sysfs hotkey radio_sw (pollable) ------------------------------------ */
2660 static ssize_t hotkey_radio_sw_show(struct device *dev,
2661                            struct device_attribute *attr,
2662                            char *buf)
2663 {
2664         int res;
2665         res = hotkey_get_wlsw();
2666         if (res < 0)
2667                 return res;
2668
2669         /* Opportunistic update */
2670         tpacpi_rfk_update_hwblock_state((res == TPACPI_RFK_RADIO_OFF));
2671
2672         return snprintf(buf, PAGE_SIZE, "%d\n",
2673                         (res == TPACPI_RFK_RADIO_OFF) ? 0 : 1);
2674 }
2675
2676 static struct device_attribute dev_attr_hotkey_radio_sw =
2677         __ATTR(hotkey_radio_sw, S_IRUGO, hotkey_radio_sw_show, NULL);
2678
2679 static void hotkey_radio_sw_notify_change(void)
2680 {
2681         if (tp_features.hotkey_wlsw)
2682                 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2683                              "hotkey_radio_sw");
2684 }
2685
2686 /* sysfs hotkey tablet mode (pollable) --------------------------------- */
2687 static ssize_t hotkey_tablet_mode_show(struct device *dev,
2688                            struct device_attribute *attr,
2689                            char *buf)
2690 {
2691         int res, s;
2692         res = hotkey_get_tablet_mode(&s);
2693         if (res < 0)
2694                 return res;
2695
2696         return snprintf(buf, PAGE_SIZE, "%d\n", !!s);
2697 }
2698
2699 static struct device_attribute dev_attr_hotkey_tablet_mode =
2700         __ATTR(hotkey_tablet_mode, S_IRUGO, hotkey_tablet_mode_show, NULL);
2701
2702 static void hotkey_tablet_mode_notify_change(void)
2703 {
2704         if (tp_features.hotkey_tablet)
2705                 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2706                              "hotkey_tablet_mode");
2707 }
2708
2709 /* sysfs hotkey report_mode -------------------------------------------- */
2710 static ssize_t hotkey_report_mode_show(struct device *dev,
2711                            struct device_attribute *attr,
2712                            char *buf)
2713 {
2714         return snprintf(buf, PAGE_SIZE, "%d\n",
2715                 (hotkey_report_mode != 0) ? hotkey_report_mode : 1);
2716 }
2717
2718 static struct device_attribute dev_attr_hotkey_report_mode =
2719         __ATTR(hotkey_report_mode, S_IRUGO, hotkey_report_mode_show, NULL);
2720
2721 /* sysfs wakeup reason (pollable) -------------------------------------- */
2722 static ssize_t hotkey_wakeup_reason_show(struct device *dev,
2723                            struct device_attribute *attr,
2724                            char *buf)
2725 {
2726         return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_wakeup_reason);
2727 }
2728
2729 static struct device_attribute dev_attr_hotkey_wakeup_reason =
2730         __ATTR(wakeup_reason, S_IRUGO, hotkey_wakeup_reason_show, NULL);
2731
2732 static void hotkey_wakeup_reason_notify_change(void)
2733 {
2734         if (tp_features.hotkey_mask)
2735                 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2736                              "wakeup_reason");
2737 }
2738
2739 /* sysfs wakeup hotunplug_complete (pollable) -------------------------- */
2740 static ssize_t hotkey_wakeup_hotunplug_complete_show(struct device *dev,
2741                            struct device_attribute *attr,
2742                            char *buf)
2743 {
2744         return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_autosleep_ack);
2745 }
2746
2747 static struct device_attribute dev_attr_hotkey_wakeup_hotunplug_complete =
2748         __ATTR(wakeup_hotunplug_complete, S_IRUGO,
2749                hotkey_wakeup_hotunplug_complete_show, NULL);
2750
2751 static void hotkey_wakeup_hotunplug_complete_notify_change(void)
2752 {
2753         if (tp_features.hotkey_mask)
2754                 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2755                              "wakeup_hotunplug_complete");
2756 }
2757
2758 /* --------------------------------------------------------------------- */
2759
2760 static struct attribute *hotkey_attributes[] __initdata = {
2761         &dev_attr_hotkey_enable.attr,
2762         &dev_attr_hotkey_bios_enabled.attr,
2763         &dev_attr_hotkey_report_mode.attr,
2764 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2765         &dev_attr_hotkey_mask.attr,
2766         &dev_attr_hotkey_all_mask.attr,
2767         &dev_attr_hotkey_recommended_mask.attr,
2768         &dev_attr_hotkey_source_mask.attr,
2769         &dev_attr_hotkey_poll_freq.attr,
2770 #endif
2771 };
2772
2773 static struct attribute *hotkey_mask_attributes[] __initdata = {
2774         &dev_attr_hotkey_bios_mask.attr,
2775 #ifndef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2776         &dev_attr_hotkey_mask.attr,
2777         &dev_attr_hotkey_all_mask.attr,
2778         &dev_attr_hotkey_recommended_mask.attr,
2779 #endif
2780         &dev_attr_hotkey_wakeup_reason.attr,
2781         &dev_attr_hotkey_wakeup_hotunplug_complete.attr,
2782 };
2783
2784 /*
2785  * Sync both the hw and sw blocking state of all switches
2786  */
2787 static void tpacpi_send_radiosw_update(void)
2788 {
2789         int wlsw;
2790
2791         /*
2792          * We must sync all rfkill controllers *before* issuing any
2793          * rfkill input events, or we will race the rfkill core input
2794          * handler.
2795          *
2796          * tpacpi_inputdev_send_mutex works as a syncronization point
2797          * for the above.
2798          *
2799          * We optimize to avoid numerous calls to hotkey_get_wlsw.
2800          */
2801
2802         wlsw = hotkey_get_wlsw();
2803
2804         /* Sync hw blocking state first if it is hw-blocked */
2805         if (wlsw == TPACPI_RFK_RADIO_OFF)
2806                 tpacpi_rfk_update_hwblock_state(true);
2807
2808         /* Sync sw blocking state */
2809         tpacpi_rfk_update_swstate_all();
2810
2811         /* Sync hw blocking state last if it is hw-unblocked */
2812         if (wlsw == TPACPI_RFK_RADIO_ON)
2813                 tpacpi_rfk_update_hwblock_state(false);
2814
2815         /* Issue rfkill input event for WLSW switch */
2816         if (!(wlsw < 0)) {
2817                 mutex_lock(&tpacpi_inputdev_send_mutex);
2818
2819                 input_report_switch(tpacpi_inputdev,
2820                                     SW_RFKILL_ALL, (wlsw > 0));
2821                 input_sync(tpacpi_inputdev);
2822
2823                 mutex_unlock(&tpacpi_inputdev_send_mutex);
2824         }
2825
2826         /*
2827          * this can be unconditional, as we will poll state again
2828          * if userspace uses the notify to read data
2829          */
2830         hotkey_radio_sw_notify_change();
2831 }
2832
2833 static void hotkey_exit(void)
2834 {
2835 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2836         mutex_lock(&hotkey_mutex);
2837         hotkey_poll_stop_sync();
2838         mutex_unlock(&hotkey_mutex);
2839 #endif
2840
2841         if (hotkey_dev_attributes)
2842                 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
2843
2844         kfree(hotkey_keycode_map);
2845
2846         if (tp_features.hotkey) {
2847                 dbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_HKEY,
2848                            "restoring original hot key mask\n");
2849                 /* no short-circuit boolean operator below! */
2850                 if ((hotkey_mask_set(hotkey_orig_mask) |
2851                      hotkey_status_set(false)) != 0)
2852                         printk(TPACPI_ERR
2853                                "failed to restore hot key mask "
2854                                "to BIOS defaults\n");
2855         }
2856 }
2857
2858 static void __init hotkey_unmap(const unsigned int scancode)
2859 {
2860         if (hotkey_keycode_map[scancode] != KEY_RESERVED) {
2861                 clear_bit(hotkey_keycode_map[scancode],
2862                           tpacpi_inputdev->keybit);
2863                 hotkey_keycode_map[scancode] = KEY_RESERVED;
2864         }
2865 }
2866
2867 static int __init hotkey_init(struct ibm_init_struct *iibm)
2868 {
2869         /* Requirements for changing the default keymaps:
2870          *
2871          * 1. Many of the keys are mapped to KEY_RESERVED for very
2872          *    good reasons.  Do not change them unless you have deep
2873          *    knowledge on the IBM and Lenovo ThinkPad firmware for
2874          *    the various ThinkPad models.  The driver behaves
2875          *    differently for KEY_RESERVED: such keys have their
2876          *    hot key mask *unset* in mask_recommended, and also
2877          *    in the initial hot key mask programmed into the
2878          *    firmware at driver load time, which means the firm-
2879          *    ware may react very differently if you change them to
2880          *    something else;
2881          *
2882          * 2. You must be subscribed to the linux-thinkpad and
2883          *    ibm-acpi-devel mailing lists, and you should read the
2884          *    list archives since 2007 if you want to change the
2885          *    keymaps.  This requirement exists so that you will
2886          *    know the past history of problems with the thinkpad-
2887          *    acpi driver keymaps, and also that you will be
2888          *    listening to any bug reports;
2889          *
2890          * 3. Do not send thinkpad-acpi specific patches directly to
2891          *    for merging, *ever*.  Send them to the linux-acpi
2892          *    mailinglist for comments.  Merging is to be done only
2893          *    through acpi-test and the ACPI maintainer.
2894          *
2895          * If the above is too much to ask, don't change the keymap.
2896          * Ask the thinkpad-acpi maintainer to do it, instead.
2897          */
2898         static u16 ibm_keycode_map[] __initdata = {
2899                 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
2900                 KEY_FN_F1,      KEY_FN_F2,      KEY_COFFEE,     KEY_SLEEP,
2901                 KEY_WLAN,       KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
2902                 KEY_FN_F9,      KEY_FN_F10,     KEY_FN_F11,     KEY_SUSPEND,
2903
2904                 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
2905                 KEY_UNKNOWN,    /* 0x0C: FN+BACKSPACE */
2906                 KEY_UNKNOWN,    /* 0x0D: FN+INSERT */
2907                 KEY_UNKNOWN,    /* 0x0E: FN+DELETE */
2908
2909                 /* brightness: firmware always reacts to them, unless
2910                  * X.org did some tricks in the radeon BIOS scratch
2911                  * registers of *some* models */
2912                 KEY_RESERVED,   /* 0x0F: FN+HOME (brightness up) */
2913                 KEY_RESERVED,   /* 0x10: FN+END (brightness down) */
2914
2915                 /* Thinklight: firmware always react to it */
2916                 KEY_RESERVED,   /* 0x11: FN+PGUP (thinklight toggle) */
2917
2918                 KEY_UNKNOWN,    /* 0x12: FN+PGDOWN */
2919                 KEY_ZOOM,       /* 0x13: FN+SPACE (zoom) */
2920
2921                 /* Volume: firmware always react to it and reprograms
2922                  * the built-in *extra* mixer.  Never map it to control
2923                  * another mixer by default. */
2924                 KEY_RESERVED,   /* 0x14: VOLUME UP */
2925                 KEY_RESERVED,   /* 0x15: VOLUME DOWN */
2926                 KEY_RESERVED,   /* 0x16: MUTE */
2927
2928                 KEY_VENDOR,     /* 0x17: Thinkpad/AccessIBM/Lenovo */
2929
2930                 /* (assignments unknown, please report if found) */
2931                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
2932                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
2933         };
2934         static u16 lenovo_keycode_map[] __initdata = {
2935                 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
2936                 KEY_FN_F1,      KEY_COFFEE,     KEY_BATTERY,    KEY_SLEEP,
2937                 KEY_WLAN,       KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
2938                 KEY_FN_F9,      KEY_FN_F10,     KEY_FN_F11,     KEY_SUSPEND,
2939
2940                 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
2941                 KEY_UNKNOWN,    /* 0x0C: FN+BACKSPACE */
2942                 KEY_UNKNOWN,    /* 0x0D: FN+INSERT */
2943                 KEY_UNKNOWN,    /* 0x0E: FN+DELETE */
2944
2945                 /* These should be enabled --only-- when ACPI video
2946                  * is disabled (i.e. in "vendor" mode), and are handled
2947                  * in a special way by the init code */
2948                 KEY_BRIGHTNESSUP,       /* 0x0F: FN+HOME (brightness up) */
2949                 KEY_BRIGHTNESSDOWN,     /* 0x10: FN+END (brightness down) */
2950
2951                 KEY_RESERVED,   /* 0x11: FN+PGUP (thinklight toggle) */
2952
2953                 KEY_UNKNOWN,    /* 0x12: FN+PGDOWN */
2954                 KEY_ZOOM,       /* 0x13: FN+SPACE (zoom) */
2955
2956                 /* Volume: z60/z61, T60 (BIOS version?): firmware always
2957                  * react to it and reprograms the built-in *extra* mixer.
2958                  * Never map it to control another mixer by default.
2959                  *
2960                  * T60?, T61, R60?, R61: firmware and EC tries to send
2961                  * these over the regular keyboard, so these are no-ops,
2962                  * but there are still weird bugs re. MUTE, so do not
2963                  * change unless you get test reports from all Lenovo
2964                  * models.  May cause the BIOS to interfere with the
2965                  * HDA mixer.
2966                  */
2967                 KEY_RESERVED,   /* 0x14: VOLUME UP */
2968                 KEY_RESERVED,   /* 0x15: VOLUME DOWN */
2969                 KEY_RESERVED,   /* 0x16: MUTE */
2970
2971                 KEY_VENDOR,     /* 0x17: Thinkpad/AccessIBM/Lenovo */
2972
2973                 /* (assignments unknown, please report if found) */
2974                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
2975                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
2976         };
2977
2978 #define TPACPI_HOTKEY_MAP_LEN           ARRAY_SIZE(ibm_keycode_map)
2979 #define TPACPI_HOTKEY_MAP_SIZE          sizeof(ibm_keycode_map)
2980 #define TPACPI_HOTKEY_MAP_TYPESIZE      sizeof(ibm_keycode_map[0])
2981
2982         int res, i;
2983         int status;
2984         int hkeyv;
2985
2986         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
2987                         "initializing hotkey subdriver\n");
2988
2989         BUG_ON(!tpacpi_inputdev);
2990         BUG_ON(tpacpi_inputdev->open != NULL ||
2991                tpacpi_inputdev->close != NULL);
2992
2993         TPACPI_ACPIHANDLE_INIT(hkey);
2994         mutex_init(&hotkey_mutex);
2995
2996 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2997         mutex_init(&hotkey_thread_mutex);
2998         mutex_init(&hotkey_thread_data_mutex);
2999 #endif
3000
3001         /* hotkey not supported on 570 */
3002         tp_features.hotkey = hkey_handle != NULL;
3003
3004         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3005                 "hotkeys are %s\n",
3006                 str_supported(tp_features.hotkey));
3007
3008         if (!tp_features.hotkey)
3009                 return 1;
3010
3011         tpacpi_disable_brightness_delay();
3012
3013         hotkey_dev_attributes = create_attr_set(13, NULL);
3014         if (!hotkey_dev_attributes)
3015                 return -ENOMEM;
3016         res = add_many_to_attr_set(hotkey_dev_attributes,
3017                         hotkey_attributes,
3018                         ARRAY_SIZE(hotkey_attributes));
3019         if (res)
3020                 goto err_exit;
3021
3022         /* mask not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
3023            A30, R30, R31, T20-22, X20-21, X22-24.  Detected by checking
3024            for HKEY interface version 0x100 */
3025         if (acpi_evalf(hkey_handle, &hkeyv, "MHKV", "qd")) {
3026                 if ((hkeyv >> 8) != 1) {
3027                         printk(TPACPI_ERR "unknown version of the "
3028                                "HKEY interface: 0x%x\n", hkeyv);
3029                         printk(TPACPI_ERR "please report this to %s\n",
3030                                TPACPI_MAIL);
3031                 } else {
3032                         /*
3033                          * MHKV 0x100 in A31, R40, R40e,
3034                          * T4x, X31, and later
3035                          */
3036                         tp_features.hotkey_mask = 1;
3037                         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3038                                 "firmware HKEY interface version: 0x%x\n",
3039                                 hkeyv);
3040                 }
3041         }
3042
3043         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3044                 "hotkey masks are %s\n",
3045                 str_supported(tp_features.hotkey_mask));
3046
3047         if (tp_features.hotkey_mask) {
3048                 if (!acpi_evalf(hkey_handle, &hotkey_all_mask,
3049                                 "MHKA", "qd")) {
3050                         printk(TPACPI_ERR
3051                                "missing MHKA handler, "
3052                                "please report this to %s\n",
3053                                TPACPI_MAIL);
3054                         /* FN+F12, FN+F4, FN+F3 */
3055                         hotkey_all_mask = 0x080cU;
3056                 }
3057         }
3058
3059         /* hotkey_source_mask *must* be zero for
3060          * the first hotkey_mask_get */
3061         if (tp_features.hotkey_mask) {
3062                 res = hotkey_mask_get();
3063                 if (res)
3064                         goto err_exit;
3065
3066                 hotkey_orig_mask = hotkey_mask;
3067                 res = add_many_to_attr_set(
3068                                 hotkey_dev_attributes,
3069                                 hotkey_mask_attributes,
3070                                 ARRAY_SIZE(hotkey_mask_attributes));
3071                 if (res)
3072                         goto err_exit;
3073         }
3074
3075 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3076         if (dbg_wlswemul) {
3077                 tp_features.hotkey_wlsw = 1;
3078                 printk(TPACPI_INFO
3079                         "radio switch emulation enabled\n");
3080         } else
3081 #endif
3082         /* Not all thinkpads have a hardware radio switch */
3083         if (acpi_evalf(hkey_handle, &status, "WLSW", "qd")) {
3084                 tp_features.hotkey_wlsw = 1;
3085                 printk(TPACPI_INFO
3086                         "radio switch found; radios are %s\n",
3087                         enabled(status, 0));
3088         }
3089         if (tp_features.hotkey_wlsw)
3090                 res = add_to_attr_set(hotkey_dev_attributes,
3091                                 &dev_attr_hotkey_radio_sw.attr);
3092
3093         /* For X41t, X60t, X61t Tablets... */
3094         if (!res && acpi_evalf(hkey_handle, &status, "MHKG", "qd")) {
3095                 tp_features.hotkey_tablet = 1;
3096                 printk(TPACPI_INFO
3097                         "possible tablet mode switch found; "
3098                         "ThinkPad in %s mode\n",
3099                         (status & TP_HOTKEY_TABLET_MASK)?
3100                                 "tablet" : "laptop");
3101                 res = add_to_attr_set(hotkey_dev_attributes,
3102                                 &dev_attr_hotkey_tablet_mode.attr);
3103         }
3104
3105         if (!res)
3106                 res = register_attr_set_with_sysfs(
3107                                 hotkey_dev_attributes,
3108                                 &tpacpi_pdev->dev.kobj);
3109         if (res)
3110                 goto err_exit;
3111
3112         /* Set up key map */
3113
3114         hotkey_keycode_map = kmalloc(TPACPI_HOTKEY_MAP_SIZE,
3115                                         GFP_KERNEL);
3116         if (!hotkey_keycode_map) {
3117                 printk(TPACPI_ERR
3118                         "failed to allocate memory for key map\n");
3119                 res = -ENOMEM;
3120                 goto err_exit;
3121         }
3122
3123         if (thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO) {
3124                 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3125                            "using Lenovo default hot key map\n");
3126                 memcpy(hotkey_keycode_map, &lenovo_keycode_map,
3127                         TPACPI_HOTKEY_MAP_SIZE);
3128         } else {
3129                 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3130                            "using IBM default hot key map\n");
3131                 memcpy(hotkey_keycode_map, &ibm_keycode_map,
3132                         TPACPI_HOTKEY_MAP_SIZE);
3133         }
3134
3135         set_bit(EV_KEY, tpacpi_inputdev->evbit);
3136         set_bit(EV_MSC, tpacpi_inputdev->evbit);
3137         set_bit(MSC_SCAN, tpacpi_inputdev->mscbit);
3138         tpacpi_inputdev->keycodesize = TPACPI_HOTKEY_MAP_TYPESIZE;
3139         tpacpi_inputdev->keycodemax = TPACPI_HOTKEY_MAP_LEN;
3140         tpacpi_inputdev->keycode = hotkey_keycode_map;
3141         for (i = 0; i < TPACPI_HOTKEY_MAP_LEN; i++) {
3142                 if (hotkey_keycode_map[i] != KEY_RESERVED) {
3143                         set_bit(hotkey_keycode_map[i],
3144                                 tpacpi_inputdev->keybit);
3145                 } else {
3146                         if (i < sizeof(hotkey_reserved_mask)*8)
3147                                 hotkey_reserved_mask |= 1 << i;
3148                 }
3149         }
3150
3151         if (tp_features.hotkey_wlsw) {
3152                 set_bit(EV_SW, tpacpi_inputdev->evbit);
3153                 set_bit(SW_RFKILL_ALL, tpacpi_inputdev->swbit);
3154         }
3155         if (tp_features.hotkey_tablet) {
3156                 set_bit(EV_SW, tpacpi_inputdev->evbit);
3157                 set_bit(SW_TABLET_MODE, tpacpi_inputdev->swbit);
3158         }
3159
3160         /* Do not issue duplicate brightness change events to
3161          * userspace */
3162         if (!tp_features.bright_acpimode)
3163                 /* update bright_acpimode... */
3164                 tpacpi_check_std_acpi_brightness_support();
3165
3166         if (tp_features.bright_acpimode && acpi_video_backlight_support()) {
3167                 printk(TPACPI_INFO
3168                        "This ThinkPad has standard ACPI backlight "
3169                        "brightness control, supported by the ACPI "
3170                        "video driver\n");
3171                 printk(TPACPI_NOTICE
3172                        "Disabling thinkpad-acpi brightness events "
3173                        "by default...\n");
3174
3175                 /* Disable brightness up/down on Lenovo thinkpads when
3176                  * ACPI is handling them, otherwise it is plain impossible
3177                  * for userspace to do something even remotely sane */
3178                 hotkey_reserved_mask |=
3179                         (1 << TP_ACPI_HOTKEYSCAN_FNHOME)
3180                         | (1 << TP_ACPI_HOTKEYSCAN_FNEND);
3181                 hotkey_unmap(TP_ACPI_HOTKEYSCAN_FNHOME);
3182                 hotkey_unmap(TP_ACPI_HOTKEYSCAN_FNEND);
3183         }
3184
3185 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
3186         if (tp_features.hotkey_mask) {
3187                 hotkey_source_mask = TPACPI_HKEY_NVRAM_GOOD_MASK
3188                                         & ~hotkey_all_mask
3189                                         & ~hotkey_reserved_mask;
3190         } else {
3191                 hotkey_source_mask = TPACPI_HKEY_NVRAM_GOOD_MASK
3192                                         & ~hotkey_reserved_mask;
3193         }
3194
3195         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3196                     "hotkey source mask 0x%08x, polling freq %u\n",
3197                     hotkey_source_mask, hotkey_poll_freq);
3198 #endif
3199
3200         dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3201                         "enabling firmware HKEY event interface...\n");
3202         res = hotkey_status_set(true);
3203         if (res) {
3204                 hotkey_exit();
3205                 return res;
3206         }
3207         res = hotkey_mask_set(((hotkey_all_mask | hotkey_source_mask)
3208                                 & ~hotkey_reserved_mask)
3209                                 | hotkey_orig_mask);
3210         if (res < 0 && res != -ENXIO) {
3211                 hotkey_exit();
3212                 return res;
3213         }
3214
3215         dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3216                         "legacy ibm/hotkey event reporting over procfs %s\n",
3217                         (hotkey_report_mode < 2) ?
3218                                 "enabled" : "disabled");
3219
3220         tpacpi_inputdev->open = &hotkey_inputdev_open;
3221         tpacpi_inputdev->close = &hotkey_inputdev_close;
3222
3223         hotkey_poll_setup_safe(true);
3224         tpacpi_send_radiosw_update();
3225         tpacpi_input_send_tabletsw();
3226
3227         return 0;
3228
3229 err_exit:
3230         delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
3231         hotkey_dev_attributes = NULL;
3232
3233         return (res < 0)? res : 1;
3234 }
3235
3236 static bool hotkey_notify_hotkey(const u32 hkey,
3237                                  bool *send_acpi_ev,
3238                                  bool *ignore_acpi_ev)
3239 {
3240         /* 0x1000-0x1FFF: key presses */
3241         unsigned int scancode = hkey & 0xfff;
3242         *send_acpi_ev = true;
3243         *ignore_acpi_ev = false;
3244
3245         if (scancode > 0 && scancode < 0x21) {
3246                 scancode--;
3247                 if (!(hotkey_source_mask & (1 << scancode))) {
3248                         tpacpi_input_send_key(scancode);
3249                         *send_acpi_ev = false;
3250                 } else {
3251                         *ignore_acpi_ev = true;
3252                 }
3253                 return true;
3254         }
3255         return false;
3256 }
3257
3258 static bool hotkey_notify_wakeup(const u32 hkey,
3259                                  bool *send_acpi_ev,
3260                                  bool *ignore_acpi_ev)
3261 {
3262         /* 0x2000-0x2FFF: Wakeup reason */
3263         *send_acpi_ev = true;
3264         *ignore_acpi_ev = false;
3265
3266         switch (hkey) {
3267         case 0x2304: /* suspend, undock */
3268         case 0x2404: /* hibernation, undock */
3269                 hotkey_wakeup_reason = TP_ACPI_WAKEUP_UNDOCK;
3270                 *ignore_acpi_ev = true;
3271                 break;
3272
3273         case 0x2305: /* suspend, bay eject */
3274         case 0x2405: /* hibernation, bay eject */
3275                 hotkey_wakeup_reason = TP_ACPI_WAKEUP_BAYEJ;
3276                 *ignore_acpi_ev = true;
3277                 break;
3278
3279         case 0x2313: /* Battery on critical low level (S3) */
3280         case 0x2413: /* Battery on critical low level (S4) */
3281                 printk(TPACPI_ALERT
3282                         "EMERGENCY WAKEUP: battery almost empty\n");
3283                 /* how to auto-heal: */
3284                 /* 2313: woke up from S3, go to S4/S5 */
3285                 /* 2413: woke up from S4, go to S5 */
3286                 break;
3287
3288         default:
3289                 return false;
3290         }
3291
3292         if (hotkey_wakeup_reason != TP_ACPI_WAKEUP_NONE) {
3293                 printk(TPACPI_INFO
3294                        "woke up due to a hot-unplug "
3295                        "request...\n");
3296                 hotkey_wakeup_reason_notify_change();
3297         }
3298         return true;
3299 }
3300
3301 static bool hotkey_notify_usrevent(const u32 hkey,
3302                                  bool *send_acpi_ev,
3303                                  bool *ignore_acpi_ev)
3304 {
3305         /* 0x5000-0x5FFF: human interface helpers */
3306         *send_acpi_ev = true;
3307         *ignore_acpi_ev = false;
3308
3309         switch (hkey) {
3310         case 0x5010: /* Lenovo new BIOS: brightness changed */
3311         case 0x500b: /* X61t: tablet pen inserted into bay */
3312         case 0x500c: /* X61t: tablet pen removed from bay */
3313                 return true;
3314
3315         case 0x5009: /* X41t-X61t: swivel up (tablet mode) */
3316         case 0x500a: /* X41t-X61t: swivel down (normal mode) */
3317                 tpacpi_input_send_tabletsw();
3318                 hotkey_tablet_mode_notify_change();
3319                 *send_acpi_ev = false;
3320                 return true;
3321
3322         case 0x5001:
3323         case 0x5002:
3324                 /* LID switch events.  Do not propagate */
3325                 *ignore_acpi_ev = true;
3326                 return true;
3327
3328         default:
3329                 return false;
3330         }
3331 }
3332
3333 static bool hotkey_notify_thermal(const u32 hkey,
3334                                  bool *send_acpi_ev,
3335                                  bool *ignore_acpi_ev)
3336 {
3337         /* 0x6000-0x6FFF: thermal alarms */
3338         *send_acpi_ev = true;
3339         *ignore_acpi_ev = false;
3340
3341         switch (hkey) {
3342         case 0x6011:
3343                 printk(TPACPI_CRIT
3344                         "THERMAL ALARM: battery is too hot!\n");
3345                 /* recommended action: warn user through gui */
3346                 return true;
3347         case 0x6012:
3348                 printk(TPACPI_ALERT
3349                         "THERMAL EMERGENCY: battery is extremely hot!\n");
3350                 /* recommended action: immediate sleep/hibernate */
3351                 return true;
3352         case 0x6021:
3353                 printk(TPACPI_CRIT
3354                         "THERMAL ALARM: "
3355                         "a sensor reports something is too hot!\n");
3356                 /* recommended action: warn user through gui, that */
3357                 /* some internal component is too hot */
3358                 return true;
3359         case 0x6022:
3360                 printk(TPACPI_ALERT
3361                         "THERMAL EMERGENCY: "
3362                         "a sensor reports something is extremely hot!\n");
3363                 /* recommended action: immediate sleep/hibernate */
3364                 return true;
3365         case 0x6030:
3366                 printk(TPACPI_INFO
3367                         "EC reports that Thermal Table has changed\n");
3368                 /* recommended action: do nothing, we don't have
3369                  * Lenovo ATM information */
3370                 return true;
3371         default:
3372                 printk(TPACPI_ALERT
3373                          "THERMAL ALERT: unknown thermal alarm received\n");
3374                 return false;
3375         }
3376 }
3377
3378 static void hotkey_notify(struct ibm_struct *ibm, u32 event)
3379 {
3380         u32 hkey;
3381         bool send_acpi_ev;
3382         bool ignore_acpi_ev;
3383         bool known_ev;
3384
3385         if (event != 0x80) {
3386                 printk(TPACPI_ERR
3387                        "unknown HKEY notification event %d\n", event);
3388                 /* forward it to userspace, maybe it knows how to handle it */
3389                 acpi_bus_generate_netlink_event(
3390                                         ibm->acpi->device->pnp.device_class,
3391                                         dev_name(&ibm->acpi->device->dev),
3392                                         event, 0);
3393                 return;
3394         }
3395
3396         while (1) {
3397                 if (!acpi_evalf(hkey_handle, &hkey, "MHKP", "d")) {
3398                         printk(TPACPI_ERR "failed to retrieve HKEY event\n");
3399                         return;
3400                 }
3401
3402                 if (hkey == 0) {
3403                         /* queue empty */
3404                         return;
3405                 }
3406
3407                 send_acpi_ev = true;
3408                 ignore_acpi_ev = false;
3409
3410                 switch (hkey >> 12) {
3411                 case 1:
3412                         /* 0x1000-0x1FFF: key presses */
3413                         known_ev = hotkey_notify_hotkey(hkey, &send_acpi_ev,
3414                                                  &ignore_acpi_ev);
3415                         break;
3416                 case 2:
3417                         /* 0x2000-0x2FFF: Wakeup reason */
3418                         known_ev = hotkey_notify_wakeup(hkey, &send_acpi_ev,
3419                                                  &ignore_acpi_ev);
3420                         break;
3421                 case 3:
3422                         /* 0x3000-0x3FFF: bay-related wakeups */
3423                         if (hkey == 0x3003) {
3424                                 hotkey_autosleep_ack = 1;
3425                                 printk(TPACPI_INFO
3426                                        "bay ejected\n");
3427                                 hotkey_wakeup_hotunplug_complete_notify_change();
3428                                 known_ev = true;
3429                         } else {
3430                                 known_ev = false;
3431                         }
3432                         break;
3433                 case 4:
3434                         /* 0x4000-0x4FFF: dock-related wakeups */
3435                         if (hkey == 0x4003) {
3436                                 hotkey_autosleep_ack = 1;
3437                                 printk(TPACPI_INFO
3438                                        "undocked\n");
3439                                 hotkey_wakeup_hotunplug_complete_notify_change();
3440                                 known_ev = true;
3441                         } else {
3442                                 known_ev = false;
3443                         }
3444                         break;
3445                 case 5:
3446                         /* 0x5000-0x5FFF: human interface helpers */
3447                         known_ev = hotkey_notify_usrevent(hkey, &send_acpi_ev,
3448                                                  &ignore_acpi_ev);
3449                         break;
3450                 case 6:
3451                         /* 0x6000-0x6FFF: thermal alarms */
3452                         known_ev = hotkey_notify_thermal(hkey, &send_acpi_ev,
3453                                                  &ignore_acpi_ev);
3454                         break;
3455                 case 7:
3456                         /* 0x7000-0x7FFF: misc */
3457                         if (tp_features.hotkey_wlsw && hkey == 0x7000) {
3458                                 tpacpi_send_radiosw_update();
3459                                 send_acpi_ev = 0;
3460                                 known_ev = true;
3461                                 break;
3462                         }
3463                         /* fallthrough to default */
3464                 default:
3465                         known_ev = false;
3466                 }
3467                 if (!known_ev) {
3468                         printk(TPACPI_NOTICE
3469                                "unhandled HKEY event 0x%04x\n", hkey);
3470                         printk(TPACPI_NOTICE
3471                                "please report the conditions when this "
3472                                "event happened to %s\n", TPACPI_MAIL);
3473                 }
3474
3475                 /* Legacy events */
3476                 if (!ignore_acpi_ev &&
3477                     (send_acpi_ev || hotkey_report_mode < 2)) {
3478                         acpi_bus_generate_proc_event(ibm->acpi->device,
3479                                                      event, hkey);
3480                 }
3481
3482                 /* netlink events */
3483                 if (!ignore_acpi_ev && send_acpi_ev) {
3484                         acpi_bus_generate_netlink_event(
3485                                         ibm->acpi->device->pnp.device_class,
3486                                         dev_name(&ibm->acpi->device->dev),
3487                                         event, hkey);
3488                 }
3489         }
3490 }
3491
3492 static void hotkey_suspend(pm_message_t state)
3493 {
3494         /* Do these on suspend, we get the events on early resume! */
3495         hotkey_wakeup_reason = TP_ACPI_WAKEUP_NONE;
3496         hotkey_autosleep_ack = 0;
3497 }
3498
3499 static void hotkey_resume(void)
3500 {
3501         tpacpi_disable_brightness_delay();
3502
3503         if (hotkey_mask_get())
3504                 printk(TPACPI_ERR
3505                        "error while trying to read hot key mask "
3506                        "from firmware\n");
3507         tpacpi_send_radiosw_update();
3508         hotkey_tablet_mode_notify_change();
3509         hotkey_wakeup_reason_notify_change();
3510         hotkey_wakeup_hotunplug_complete_notify_change();
3511         hotkey_poll_setup_safe(false);
3512 }
3513
3514 /* procfs -------------------------------------------------------------- */
3515 static int hotkey_read(char *p)
3516 {
3517         int res, status;
3518         int len = 0;
3519
3520         if (!tp_features.hotkey) {
3521                 len += sprintf(p + len, "status:\t\tnot supported\n");
3522                 return len;
3523         }
3524
3525         if (mutex_lock_killable(&hotkey_mutex))
3526                 return -ERESTARTSYS;
3527         res = hotkey_status_get(&status);
3528         if (!res)
3529                 res = hotkey_mask_get();
3530         mutex_unlock(&hotkey_mutex);
3531         if (res)
3532                 return res;
3533
3534         len += sprintf(p + len, "status:\t\t%s\n", enabled(status, 0));
3535         if (tp_features.hotkey_mask) {
3536                 len += sprintf(p + len, "mask:\t\t0x%08x\n", hotkey_mask);
3537                 len += sprintf(p + len,
3538                                "commands:\tenable, disable, reset, <mask>\n");
3539         } else {
3540                 len += sprintf(p + len, "mask:\t\tnot supported\n");
3541                 len += sprintf(p + len, "commands:\tenable, disable, reset\n");
3542         }
3543
3544         return len;
3545 }
3546
3547 static void hotkey_enabledisable_warn(bool enable)
3548 {
3549         tpacpi_log_usertask("procfs hotkey enable/disable");
3550         if (!WARN((tpacpi_lifecycle == TPACPI_LIFE_RUNNING || !enable),
3551                         TPACPI_WARN
3552                         "hotkey enable/disable functionality has been "
3553                         "removed from the driver.  Hotkeys are always "
3554                         "enabled\n"))
3555                 printk(TPACPI_ERR
3556                         "Please remove the hotkey=enable module "
3557                         "parameter, it is deprecated.  Hotkeys are always "
3558                         "enabled\n");
3559 }
3560
3561 static int hotkey_write(char *buf)
3562 {
3563         int res;
3564         u32 mask;
3565         char *cmd;
3566
3567         if (!tp_features.hotkey)
3568                 return -ENODEV;
3569
3570         if (mutex_lock_killable(&hotkey_mutex))
3571                 return -ERESTARTSYS;
3572
3573         mask = hotkey_mask;
3574
3575         res = 0;
3576         while ((cmd = next_cmd(&buf))) {
3577                 if (strlencmp(cmd, "enable") == 0) {
3578                         hotkey_enabledisable_warn(1);
3579                 } else if (strlencmp(cmd, "disable") == 0) {
3580                         hotkey_enabledisable_warn(0);
3581                         res = -EPERM;
3582                 } else if (strlencmp(cmd, "reset") == 0) {
3583                         mask = (hotkey_all_mask | hotkey_source_mask)
3584                                 & ~hotkey_reserved_mask;
3585                 } else if (sscanf(cmd, "0x%x", &mask) == 1) {
3586                         /* mask set */
3587                 } else if (sscanf(cmd, "%x", &mask) == 1) {
3588                         /* mask set */
3589                 } else {
3590                         res = -EINVAL;
3591                         goto errexit;
3592                 }
3593         }
3594
3595         if (!res)
3596                 tpacpi_disclose_usertask("procfs hotkey",
3597                         "set mask to 0x%08x\n", mask);
3598
3599         if (!res && mask != hotkey_mask)
3600                 res = hotkey_mask_set(mask);
3601
3602 errexit:
3603         mutex_unlock(&hotkey_mutex);
3604         return res;
3605 }
3606
3607 static const struct acpi_device_id ibm_htk_device_ids[] = {
3608         {TPACPI_ACPI_HKEY_HID, 0},
3609         {"", 0},
3610 };
3611
3612 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver = {
3613         .hid = ibm_htk_device_ids,
3614         .notify = hotkey_notify,
3615         .handle = &hkey_handle,
3616         .type = ACPI_DEVICE_NOTIFY,
3617 };
3618
3619 static struct ibm_struct hotkey_driver_data = {
3620         .name = "hotkey",
3621         .read = hotkey_read,
3622         .write = hotkey_write,
3623         .exit = hotkey_exit,
3624         .resume = hotkey_resume,
3625         .suspend = hotkey_suspend,
3626         .acpi = &ibm_hotkey_acpidriver,
3627 };
3628
3629 /*************************************************************************
3630  * Bluetooth subdriver
3631  */
3632
3633 enum {
3634         /* ACPI GBDC/SBDC bits */
3635         TP_ACPI_BLUETOOTH_HWPRESENT     = 0x01, /* Bluetooth hw available */
3636         TP_ACPI_BLUETOOTH_RADIOSSW      = 0x02, /* Bluetooth radio enabled */
3637         TP_ACPI_BLUETOOTH_RESUMECTRL    = 0x04, /* Bluetooth state at resume:
3638                                                    off / last state */
3639 };
3640
3641 enum {
3642         /* ACPI \BLTH commands */
3643         TP_ACPI_BLTH_GET_ULTRAPORT_ID   = 0x00, /* Get Ultraport BT ID */
3644         TP_ACPI_BLTH_GET_PWR_ON_RESUME  = 0x01, /* Get power-on-resume state */
3645         TP_ACPI_BLTH_PWR_ON_ON_RESUME   = 0x02, /* Resume powered on */
3646         TP_ACPI_BLTH_PWR_OFF_ON_RESUME  = 0x03, /* Resume powered off */
3647         TP_ACPI_BLTH_SAVE_STATE         = 0x05, /* Save state for S4/S5 */
3648 };
3649
3650 #define TPACPI_RFK_BLUETOOTH_SW_NAME    "tpacpi_bluetooth_sw"
3651
3652 static void bluetooth_suspend(pm_message_t state)
3653 {
3654         /* Try to make sure radio will resume powered off */
3655         if (!acpi_evalf(NULL, NULL, "\\BLTH", "vd",
3656                    TP_ACPI_BLTH_PWR_OFF_ON_RESUME))
3657                 vdbg_printk(TPACPI_DBG_RFKILL,
3658                         "bluetooth power down on resume request failed\n");
3659 }
3660
3661 static int bluetooth_get_status(void)
3662 {
3663         int status;
3664
3665 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3666         if (dbg_bluetoothemul)
3667                 return (tpacpi_bluetooth_emulstate) ?
3668                        TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
3669 #endif
3670
3671         if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
3672                 return -EIO;
3673
3674         return ((status & TP_ACPI_BLUETOOTH_RADIOSSW) != 0) ?
3675                         TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
3676 }
3677
3678 static int bluetooth_set_status(enum tpacpi_rfkill_state state)
3679 {
3680         int status;
3681
3682         vdbg_printk(TPACPI_DBG_RFKILL,
3683                 "will attempt to %s bluetooth\n",
3684                 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable");
3685
3686 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3687         if (dbg_bluetoothemul) {
3688                 tpacpi_bluetooth_emulstate = (state == TPACPI_RFK_RADIO_ON);
3689                 return 0;
3690         }
3691 #endif
3692
3693         /* We make sure to keep TP_ACPI_BLUETOOTH_RESUMECTRL off */
3694         if (state == TPACPI_RFK_RADIO_ON)
3695                 status = TP_ACPI_BLUETOOTH_RADIOSSW;
3696         else
3697                 status = 0;
3698
3699         if (!acpi_evalf(hkey_handle, NULL, "SBDC", "vd", status))
3700                 return -EIO;
3701
3702         return 0;
3703 }
3704
3705 /* sysfs bluetooth enable ---------------------------------------------- */
3706 static ssize_t bluetooth_enable_show(struct device *dev,
3707                            struct device_attribute *attr,
3708                            char *buf)
3709 {
3710         return tpacpi_rfk_sysfs_enable_show(TPACPI_RFK_BLUETOOTH_SW_ID,
3711                         attr, buf);
3712 }
3713
3714 static ssize_t bluetooth_enable_store(struct device *dev,
3715                             struct device_attribute *attr,
3716                             const char *buf, size_t count)
3717 {
3718         return tpacpi_rfk_sysfs_enable_store(TPACPI_RFK_BLUETOOTH_SW_ID,
3719                                 attr, buf, count);
3720 }
3721
3722 static struct device_attribute dev_attr_bluetooth_enable =
3723         __ATTR(bluetooth_enable, S_IWUSR | S_IRUGO,
3724                 bluetooth_enable_show, bluetooth_enable_store);
3725
3726 /* --------------------------------------------------------------------- */
3727
3728 static struct attribute *bluetooth_attributes[] = {
3729         &dev_attr_bluetooth_enable.attr,
3730         NULL
3731 };
3732
3733 static const struct attribute_group bluetooth_attr_group = {
3734         .attrs = bluetooth_attributes,
3735 };
3736
3737 static const struct tpacpi_rfk_ops bluetooth_tprfk_ops = {
3738         .get_status = bluetooth_get_status,
3739         .set_status = bluetooth_set_status,
3740 };
3741
3742 static void bluetooth_shutdown(void)
3743 {
3744         /* Order firmware to save current state to NVRAM */
3745         if (!acpi_evalf(NULL, NULL, "\\BLTH", "vd",
3746                         TP_ACPI_BLTH_SAVE_STATE))
3747                 printk(TPACPI_NOTICE
3748                         "failed to save bluetooth state to NVRAM\n");
3749         else
3750                 vdbg_printk(TPACPI_DBG_RFKILL,
3751                         "bluestooth state saved to NVRAM\n");
3752 }
3753
3754 static void bluetooth_exit(void)
3755 {
3756         sysfs_remove_group(&tpacpi_pdev->dev.kobj,
3757                         &bluetooth_attr_group);
3758
3759         tpacpi_destroy_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID);
3760
3761         bluetooth_shutdown();
3762 }
3763
3764 static int __init bluetooth_init(struct ibm_init_struct *iibm)
3765 {
3766         int res;
3767         int status = 0;
3768
3769         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
3770                         "initializing bluetooth subdriver\n");
3771
3772         TPACPI_ACPIHANDLE_INIT(hkey);
3773
3774         /* bluetooth not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
3775            G4x, R30, R31, R40e, R50e, T20-22, X20-21 */
3776         tp_features.bluetooth = hkey_handle &&
3777             acpi_evalf(hkey_handle, &status, "GBDC", "qd");
3778
3779         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
3780                 "bluetooth is %s, status 0x%02x\n",
3781                 str_supported(tp_features.bluetooth),
3782                 status);
3783
3784 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3785         if (dbg_bluetoothemul) {
3786                 tp_features.bluetooth = 1;
3787                 printk(TPACPI_INFO
3788                         "bluetooth switch emulation enabled\n");
3789         } else
3790 #endif
3791         if (tp_features.bluetooth &&
3792             !(status & TP_ACPI_BLUETOOTH_HWPRESENT)) {
3793                 /* no bluetooth hardware present in system */
3794                 tp_features.bluetooth = 0;
3795                 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
3796                            "bluetooth hardware not installed\n");
3797         }
3798
3799         if (!tp_features.bluetooth)
3800                 return 1;
3801
3802         res = tpacpi_new_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID,
3803                                 &bluetooth_tprfk_ops,
3804                                 RFKILL_TYPE_BLUETOOTH,
3805                                 TPACPI_RFK_BLUETOOTH_SW_NAME,
3806                                 true);
3807         if (res)
3808                 return res;
3809
3810         res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
3811                                 &bluetooth_attr_group);
3812         if (res) {
3813                 tpacpi_destroy_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID);
3814                 return res;
3815         }
3816
3817         return 0;
3818 }
3819
3820 /* procfs -------------------------------------------------------------- */
3821 static int bluetooth_read(char *p)
3822 {
3823         return tpacpi_rfk_procfs_read(TPACPI_RFK_BLUETOOTH_SW_ID, p);
3824 }
3825
3826 static int bluetooth_write(char *buf)
3827 {
3828         return tpacpi_rfk_procfs_write(TPACPI_RFK_BLUETOOTH_SW_ID, buf);
3829 }
3830
3831 static struct ibm_struct bluetooth_driver_data = {
3832         .name = "bluetooth",
3833         .read = bluetooth_read,
3834         .write = bluetooth_write,
3835         .exit = bluetooth_exit,
3836         .suspend = bluetooth_suspend,
3837         .shutdown = bluetooth_shutdown,
3838 };
3839
3840 /*************************************************************************
3841  * Wan subdriver
3842  */
3843
3844 enum {
3845         /* ACPI GWAN/SWAN bits */
3846         TP_ACPI_WANCARD_HWPRESENT       = 0x01, /* Wan hw available */
3847         TP_ACPI_WANCARD_RADIOSSW        = 0x02, /* Wan radio enabled */
3848         TP_ACPI_WANCARD_RESUMECTRL      = 0x04, /* Wan state at resume:
3849                                                    off / last state */
3850 };
3851
3852 #define TPACPI_RFK_WWAN_SW_NAME         "tpacpi_wwan_sw"
3853
3854 static void wan_suspend(pm_message_t state)
3855 {
3856         /* Try to make sure radio will resume powered off */
3857         if (!acpi_evalf(NULL, NULL, "\\WGSV", "qvd",
3858                    TP_ACPI_WGSV_PWR_OFF_ON_RESUME))
3859                 vdbg_printk(TPACPI_DBG_RFKILL,
3860                         "WWAN power down on resume request failed\n");
3861 }
3862
3863 static int wan_get_status(void)
3864 {
3865         int status;
3866
3867 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3868         if (dbg_wwanemul)
3869                 return (tpacpi_wwan_emulstate) ?
3870                        TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
3871 #endif
3872
3873         if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
3874                 return -EIO;
3875
3876         return ((status & TP_ACPI_WANCARD_RADIOSSW) != 0) ?
3877                         TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
3878 }
3879
3880 static int wan_set_status(enum tpacpi_rfkill_state state)
3881 {
3882         int status;
3883
3884         vdbg_printk(TPACPI_DBG_RFKILL,
3885                 "will attempt to %s wwan\n",
3886                 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable");
3887
3888 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3889         if (dbg_wwanemul) {
3890                 tpacpi_wwan_emulstate = (state == TPACPI_RFK_RADIO_ON);
3891                 return 0;
3892         }
3893 #endif
3894
3895         /* We make sure to keep TP_ACPI_WANCARD_RESUMECTRL off */
3896         if (state == TPACPI_RFK_RADIO_ON)
3897                 status = TP_ACPI_WANCARD_RADIOSSW;
3898         else
3899                 status = 0;
3900
3901         if (!acpi_evalf(hkey_handle, NULL, "SWAN", "vd", status))
3902                 return -EIO;
3903
3904         return 0;
3905 }
3906
3907 /* sysfs wan enable ---------------------------------------------------- */
3908 static ssize_t wan_enable_show(struct device *dev,
3909                            struct device_attribute *attr,
3910                            char *buf)
3911 {
3912         return tpacpi_rfk_sysfs_enable_show(TPACPI_RFK_WWAN_SW_ID,
3913                         attr, buf);
3914 }
3915
3916 static ssize_t wan_enable_store(struct device *dev,
3917                             struct device_attribute *attr,
3918                             const char *buf, size_t count)
3919 {
3920         return tpacpi_rfk_sysfs_enable_store(TPACPI_RFK_WWAN_SW_ID,
3921                         attr, buf, count);
3922 }
3923
3924 static struct device_attribute dev_attr_wan_enable =
3925         __ATTR(wwan_enable, S_IWUSR | S_IRUGO,
3926                 wan_enable_show, wan_enable_store);
3927
3928 /* --------------------------------------------------------------------- */
3929
3930 static struct attribute *wan_attributes[] = {
3931         &dev_attr_wan_enable.attr,
3932         NULL
3933 };
3934
3935 static const struct attribute_group wan_attr_group = {
3936         .attrs = wan_attributes,
3937 };
3938
3939 static const struct tpacpi_rfk_ops wan_tprfk_ops = {
3940         .get_status = wan_get_status,
3941         .set_status = wan_set_status,
3942 };
3943
3944 static void wan_shutdown(void)
3945 {
3946         /* Order firmware to save current state to NVRAM */
3947         if (!acpi_evalf(NULL, NULL, "\\WGSV", "vd",
3948                         TP_ACPI_WGSV_SAVE_STATE))
3949                 printk(TPACPI_NOTICE
3950                         "failed to save WWAN state to NVRAM\n");
3951         else
3952                 vdbg_printk(TPACPI_DBG_RFKILL,
3953                         "WWAN state saved to NVRAM\n");
3954 }
3955
3956 static void wan_exit(void)
3957 {
3958         sysfs_remove_group(&tpacpi_pdev->dev.kobj,
3959                 &wan_attr_group);
3960
3961         tpacpi_destroy_rfkill(TPACPI_RFK_WWAN_SW_ID);
3962
3963         wan_shutdown();
3964 }
3965
3966 static int __init wan_init(struct ibm_init_struct *iibm)
3967 {
3968         int res;
3969         int status = 0;
3970
3971         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
3972                         "initializing wan subdriver\n");
3973
3974         TPACPI_ACPIHANDLE_INIT(hkey);
3975
3976         tp_features.wan = hkey_handle &&
3977             acpi_evalf(hkey_handle, &status, "GWAN", "qd");
3978
3979         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
3980                 "wan is %s, status 0x%02x\n",
3981                 str_supported(tp_features.wan),
3982                 status);
3983
3984 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3985         if (dbg_wwanemul) {
3986                 tp_features.wan = 1;
3987                 printk(TPACPI_INFO
3988                         "wwan switch emulation enabled\n");
3989         } else
3990 #endif
3991         if (tp_features.wan &&
3992             !(status & TP_ACPI_WANCARD_HWPRESENT)) {
3993                 /* no wan hardware present in system */
3994                 tp_features.wan = 0;
3995                 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
3996                            "wan hardware not installed\n");
3997         }
3998
3999         if (!tp_features.wan)
4000                 return 1;
4001
4002         res = tpacpi_new_rfkill(TPACPI_RFK_WWAN_SW_ID,
4003                                 &wan_tprfk_ops,
4004                                 RFKILL_TYPE_WWAN,
4005                                 TPACPI_RFK_WWAN_SW_NAME,
4006                                 true);
4007         if (res)
4008                 return res;
4009
4010         res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
4011                                 &wan_attr_group);
4012
4013         if (res) {
4014                 tpacpi_destroy_rfkill(TPACPI_RFK_WWAN_SW_ID);
4015                 return res;
4016         }
4017
4018         return 0;
4019 }
4020
4021 /* procfs -------------------------------------------------------------- */
4022 static int wan_read(char *p)
4023 {
4024         return tpacpi_rfk_procfs_read(TPACPI_RFK_WWAN_SW_ID, p);
4025 }
4026
4027 static int wan_write(char *buf)
4028 {
4029         return tpacpi_rfk_procfs_write(TPACPI_RFK_WWAN_SW_ID, buf);
4030 }
4031
4032 static struct ibm_struct wan_driver_data = {
4033         .name = "wan",
4034         .read = wan_read,
4035         .write = wan_write,
4036         .exit = wan_exit,
4037         .suspend = wan_suspend,
4038         .shutdown = wan_shutdown,
4039 };
4040
4041 /*************************************************************************
4042  * UWB subdriver
4043  */
4044
4045 enum {
4046         /* ACPI GUWB/SUWB bits */
4047         TP_ACPI_UWB_HWPRESENT   = 0x01, /* UWB hw available */
4048         TP_ACPI_UWB_RADIOSSW    = 0x02, /* UWB radio enabled */
4049 };
4050
4051 #define TPACPI_RFK_UWB_SW_NAME  "tpacpi_uwb_sw"
4052
4053 static int uwb_get_status(void)
4054 {
4055         int status;
4056
4057 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4058         if (dbg_uwbemul)
4059                 return (tpacpi_uwb_emulstate) ?
4060                        TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4061 #endif
4062
4063         if (!acpi_evalf(hkey_handle, &status, "GUWB", "d"))
4064                 return -EIO;
4065
4066         return ((status & TP_ACPI_UWB_RADIOSSW) != 0) ?
4067                         TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4068 }
4069
4070 static int uwb_set_status(enum tpacpi_rfkill_state state)
4071 {
4072         int status;
4073
4074         vdbg_printk(TPACPI_DBG_RFKILL,
4075                 "will attempt to %s UWB\n",
4076                 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable");
4077
4078 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4079         if (dbg_uwbemul) {
4080                 tpacpi_uwb_emulstate = (state == TPACPI_RFK_RADIO_ON);
4081                 return 0;
4082         }
4083 #endif
4084
4085         if (state == TPACPI_RFK_RADIO_ON)
4086                 status = TP_ACPI_UWB_RADIOSSW;
4087         else
4088                 status = 0;
4089
4090         if (!acpi_evalf(hkey_handle, NULL, "SUWB", "vd", status))
4091                 return -EIO;
4092
4093         return 0;
4094 }
4095
4096 /* --------------------------------------------------------------------- */
4097
4098 static const struct tpacpi_rfk_ops uwb_tprfk_ops = {
4099         .get_status = uwb_get_status,
4100         .set_status = uwb_set_status,
4101 };
4102
4103 static void uwb_exit(void)
4104 {
4105         tpacpi_destroy_rfkill(TPACPI_RFK_UWB_SW_ID);
4106 }
4107
4108 static int __init uwb_init(struct ibm_init_struct *iibm)
4109 {
4110         int res;
4111         int status = 0;
4112
4113         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4114                         "initializing uwb subdriver\n");
4115
4116         TPACPI_ACPIHANDLE_INIT(hkey);
4117
4118         tp_features.uwb = hkey_handle &&
4119             acpi_evalf(hkey_handle, &status, "GUWB", "qd");
4120
4121         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4122                 "uwb is %s, status 0x%02x\n",
4123                 str_supported(tp_features.uwb),
4124                 status);
4125
4126 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4127         if (dbg_uwbemul) {
4128                 tp_features.uwb = 1;
4129                 printk(TPACPI_INFO
4130                         "uwb switch emulation enabled\n");
4131         } else
4132 #endif
4133         if (tp_features.uwb &&
4134             !(status & TP_ACPI_UWB_HWPRESENT)) {
4135                 /* no uwb hardware present in system */
4136                 tp_features.uwb = 0;
4137                 dbg_printk(TPACPI_DBG_INIT,
4138                            "uwb hardware not installed\n");
4139         }
4140
4141         if (!tp_features.uwb)
4142                 return 1;
4143
4144         res = tpacpi_new_rfkill(TPACPI_RFK_UWB_SW_ID,
4145                                 &uwb_tprfk_ops,
4146                                 RFKILL_TYPE_UWB,
4147                                 TPACPI_RFK_UWB_SW_NAME,
4148                                 false);
4149         return res;
4150 }
4151
4152 static struct ibm_struct uwb_driver_data = {
4153         .name = "uwb",
4154         .exit = uwb_exit,
4155         .flags.experimental = 1,
4156 };
4157
4158 /*************************************************************************
4159  * Video subdriver
4160  */
4161
4162 #ifdef CONFIG_THINKPAD_ACPI_VIDEO
4163
4164 enum video_access_mode {
4165         TPACPI_VIDEO_NONE = 0,
4166         TPACPI_VIDEO_570,       /* 570 */
4167         TPACPI_VIDEO_770,       /* 600e/x, 770e, 770x */
4168         TPACPI_VIDEO_NEW,       /* all others */
4169 };
4170
4171 enum {  /* video status flags, based on VIDEO_570 */
4172         TP_ACPI_VIDEO_S_LCD = 0x01,     /* LCD output enabled */
4173         TP_ACPI_VIDEO_S_CRT = 0x02,     /* CRT output enabled */
4174         TP_ACPI_VIDEO_S_DVI = 0x08,     /* DVI output enabled */
4175 };
4176
4177 enum {  /* TPACPI_VIDEO_570 constants */
4178         TP_ACPI_VIDEO_570_PHSCMD = 0x87,        /* unknown magic constant :( */
4179         TP_ACPI_VIDEO_570_PHSMASK = 0x03,       /* PHS bits that map to
4180                                                  * video_status_flags */
4181         TP_ACPI_VIDEO_570_PHS2CMD = 0x8b,       /* unknown magic constant :( */
4182         TP_ACPI_VIDEO_570_PHS2SET = 0x80,       /* unknown magic constant :( */
4183 };
4184
4185 static enum video_access_mode video_supported;
4186 static int video_orig_autosw;
4187
4188 static int video_autosw_get(void);
4189 static int video_autosw_set(int enable);
4190
4191 TPACPI_HANDLE(vid2, root, "\\_SB.PCI0.AGPB.VID");       /* G41 */
4192
4193 static int __init video_init(struct ibm_init_struct *iibm)
4194 {
4195         int ivga;
4196
4197         vdbg_printk(TPACPI_DBG_INIT, "initializing video subdriver\n");
4198
4199         TPACPI_ACPIHANDLE_INIT(vid);
4200         TPACPI_ACPIHANDLE_INIT(vid2);
4201
4202         if (vid2_handle && acpi_evalf(NULL, &ivga, "\\IVGA", "d") && ivga)
4203                 /* G41, assume IVGA doesn't change */
4204                 vid_handle = vid2_handle;
4205
4206         if (!vid_handle)
4207                 /* video switching not supported on R30, R31 */
4208                 video_supported = TPACPI_VIDEO_NONE;
4209         else if (acpi_evalf(vid_handle, &video_orig_autosw, "SWIT", "qd"))
4210                 /* 570 */
4211                 video_supported = TPACPI_VIDEO_570;
4212         else if (acpi_evalf(vid_handle, &video_orig_autosw, "^VADL", "qd"))
4213                 /* 600e/x, 770e, 770x */
4214                 video_supported = TPACPI_VIDEO_770;
4215         else
4216                 /* all others */
4217                 video_supported = TPACPI_VIDEO_NEW;
4218
4219         vdbg_printk(TPACPI_DBG_INIT, "video is %s, mode %d\n",
4220                 str_supported(video_supported != TPACPI_VIDEO_NONE),
4221                 video_supported);
4222
4223         return (video_supported != TPACPI_VIDEO_NONE)? 0 : 1;
4224 }
4225
4226 static void video_exit(void)
4227 {
4228         dbg_printk(TPACPI_DBG_EXIT,
4229                    "restoring original video autoswitch mode\n");
4230         if (video_autosw_set(video_orig_autosw))
4231                 printk(TPACPI_ERR "error while trying to restore original "
4232                         "video autoswitch mode\n");
4233 }
4234
4235 static int video_outputsw_get(void)
4236 {
4237         int status = 0;
4238         int i;
4239
4240         switch (video_supported) {
4241         case TPACPI_VIDEO_570:
4242                 if (!acpi_evalf(NULL, &i, "\\_SB.PHS", "dd",
4243                                  TP_ACPI_VIDEO_570_PHSCMD))
4244                         return -EIO;
4245                 status = i & TP_ACPI_VIDEO_570_PHSMASK;
4246                 break;
4247         case TPACPI_VIDEO_770:
4248                 if (!acpi_evalf(NULL, &i, "\\VCDL", "d"))
4249                         return -EIO;
4250                 if (i)
4251                         status |= TP_ACPI_VIDEO_S_LCD;
4252                 if (!acpi_evalf(NULL, &i, "\\VCDC", "d"))
4253                         return -EIO;
4254                 if (i)
4255                         status |= TP_ACPI_VIDEO_S_CRT;
4256                 break;
4257         case TPACPI_VIDEO_NEW:
4258                 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 1) ||
4259                     !acpi_evalf(NULL, &i, "\\VCDC", "d"))
4260                         return -EIO;
4261                 if (i)
4262                         status |= TP_ACPI_VIDEO_S_CRT;
4263
4264                 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0) ||
4265                     !acpi_evalf(NULL, &i, "\\VCDL", "d"))
4266                         return -EIO;
4267                 if (i)
4268                         status |= TP_ACPI_VIDEO_S_LCD;
4269                 if (!acpi_evalf(NULL, &i, "\\VCDD", "d"))
4270                         return -EIO;
4271                 if (i)
4272                         status |= TP_ACPI_VIDEO_S_DVI;
4273                 break;
4274         default:
4275                 return -ENOSYS;
4276         }
4277
4278         return status;
4279 }
4280
4281 static int video_outputsw_set(int status)
4282 {
4283         int autosw;
4284         int res = 0;
4285
4286         switch (video_supported) {
4287         case TPACPI_VIDEO_570:
4288                 res = acpi_evalf(NULL, NULL,
4289                                  "\\_SB.PHS2", "vdd",
4290                                  TP_ACPI_VIDEO_570_PHS2CMD,
4291                                  status | TP_ACPI_VIDEO_570_PHS2SET);
4292                 break;
4293         case TPACPI_VIDEO_770:
4294                 autosw = video_autosw_get();
4295                 if (autosw < 0)
4296                         return autosw;
4297
4298                 res = video_autosw_set(1);
4299                 if (res)
4300                         return res;
4301                 res = acpi_evalf(vid_handle, NULL,
4302                                  "ASWT", "vdd", status * 0x100, 0);
4303                 if (!autosw && video_autosw_set(autosw)) {
4304                         printk(TPACPI_ERR
4305                                "video auto-switch left enabled due to error\n");
4306                         return -EIO;
4307                 }
4308                 break;
4309         case TPACPI_VIDEO_NEW:
4310                 res = acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0x80) &&
4311                       acpi_evalf(NULL, NULL, "\\VSDS", "vdd", status, 1);
4312                 break;
4313         default:
4314                 return -ENOSYS;
4315         }
4316
4317         return (res)? 0 : -EIO;
4318 }
4319
4320 static int video_autosw_get(void)
4321 {
4322         int autosw = 0;
4323
4324         switch (video_supported) {
4325         case TPACPI_VIDEO_570:
4326                 if (!acpi_evalf(vid_handle, &autosw, "SWIT", "d"))
4327                         return -EIO;
4328                 break;
4329         case TPACPI_VIDEO_770:
4330         case TPACPI_VIDEO_NEW:
4331                 if (!acpi_evalf(vid_handle, &autosw, "^VDEE", "d"))
4332                         return -EIO;
4333                 break;
4334         default:
4335                 return -ENOSYS;
4336         }
4337
4338         return autosw & 1;
4339 }
4340
4341 static int video_autosw_set(int enable)
4342 {
4343         if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", (enable)? 1 : 0))
4344                 return -EIO;
4345         return 0;
4346 }
4347
4348 static int video_outputsw_cycle(void)
4349 {
4350         int autosw = video_autosw_get();
4351         int res;
4352
4353         if (autosw < 0)
4354                 return autosw;
4355
4356         switch (video_supported) {
4357         case TPACPI_VIDEO_570:
4358                 res = video_autosw_set(1);
4359                 if (res)
4360                         return res;
4361                 res = acpi_evalf(ec_handle, NULL, "_Q16", "v");
4362                 break;
4363         case TPACPI_VIDEO_770:
4364         case TPACPI_VIDEO_NEW:
4365                 res = video_autosw_set(1);
4366                 if (res)
4367                         return res;
4368                 res = acpi_evalf(vid_handle, NULL, "VSWT", "v");
4369                 break;
4370         default:
4371                 return -ENOSYS;
4372         }
4373         if (!autosw && video_autosw_set(autosw)) {
4374                 printk(TPACPI_ERR
4375                        "video auto-switch left enabled due to error\n");
4376                 return -EIO;
4377         }
4378
4379         return (res)? 0 : -EIO;
4380 }
4381
4382 static int video_expand_toggle(void)
4383 {
4384         switch (video_supported) {
4385         case TPACPI_VIDEO_570:
4386                 return acpi_evalf(ec_handle, NULL, "_Q17", "v")?
4387                         0 : -EIO;
4388         case TPACPI_VIDEO_770:
4389                 return acpi_evalf(vid_handle, NULL, "VEXP", "v")?
4390                         0 : -EIO;
4391         case TPACPI_VIDEO_NEW:
4392                 return acpi_evalf(NULL, NULL, "\\VEXP", "v")?
4393                         0 : -EIO;
4394         default:
4395                 return -ENOSYS;
4396         }
4397         /* not reached */
4398 }
4399
4400 static int video_read(char *p)
4401 {
4402         int status, autosw;
4403         int len = 0;
4404
4405         if (video_supported == TPACPI_VIDEO_NONE) {
4406                 len += sprintf(p + len, "status:\t\tnot supported\n");
4407                 return len;
4408         }
4409
4410         status = video_outputsw_get();
4411         if (status < 0)
4412                 return status;
4413
4414         autosw = video_autosw_get();
4415         if (autosw < 0)
4416                 return autosw;
4417
4418         len += sprintf(p + len, "status:\t\tsupported\n");
4419         len += sprintf(p + len, "lcd:\t\t%s\n", enabled(status, 0));
4420         len += sprintf(p + len, "crt:\t\t%s\n", enabled(status, 1));
4421         if (video_supported == TPACPI_VIDEO_NEW)
4422                 len += sprintf(p + len, "dvi:\t\t%s\n", enabled(status, 3));
4423         len += sprintf(p + len, "auto:\t\t%s\n", enabled(autosw, 0));
4424         len += sprintf(p + len, "commands:\tlcd_enable, lcd_disable\n");
4425         len += sprintf(p + len, "commands:\tcrt_enable, crt_disable\n");
4426         if (video_supported == TPACPI_VIDEO_NEW)
4427                 len += sprintf(p + len, "commands:\tdvi_enable, dvi_disable\n");
4428         len += sprintf(p + len, "commands:\tauto_enable, auto_disable\n");
4429         len += sprintf(p + len, "commands:\tvideo_switch, expand_toggle\n");
4430
4431         return len;
4432 }
4433
4434 static int video_write(char *buf)
4435 {
4436         char *cmd;
4437         int enable, disable, status;
4438         int res;
4439
4440         if (video_supported == TPACPI_VIDEO_NONE)
4441                 return -ENODEV;
4442
4443         enable = 0;
4444         disable = 0;
4445
4446         while ((cmd = next_cmd(&buf))) {
4447                 if (strlencmp(cmd, "lcd_enable") == 0) {
4448                         enable |= TP_ACPI_VIDEO_S_LCD;
4449                 } else if (strlencmp(cmd, "lcd_disable") == 0) {
4450                         disable |= TP_ACPI_VIDEO_S_LCD;
4451                 } else if (strlencmp(cmd, "crt_enable") == 0) {
4452                         enable |= TP_ACPI_VIDEO_S_CRT;
4453                 } else if (strlencmp(cmd, "crt_disable") == 0) {
4454                         disable |= TP_ACPI_VIDEO_S_CRT;
4455                 } else if (video_supported == TPACPI_VIDEO_NEW &&
4456                            strlencmp(cmd, "dvi_enable") == 0) {
4457                         enable |= TP_ACPI_VIDEO_S_DVI;
4458                 } else if (video_supported == TPACPI_VIDEO_NEW &&
4459                            strlencmp(cmd, "dvi_disable") == 0) {
4460                         disable |= TP_ACPI_VIDEO_S_DVI;
4461                 } else if (strlencmp(cmd, "auto_enable") == 0) {
4462                         res = video_autosw_set(1);
4463                         if (res)
4464                                 return res;
4465                 } else if (strlencmp(cmd, "auto_disable") == 0) {
4466                         res = video_autosw_set(0);
4467                         if (res)
4468                                 return res;
4469                 } else if (strlencmp(cmd, "video_switch") == 0) {
4470                         res = video_outputsw_cycle();
4471                         if (res)
4472                                 return res;
4473                 } else if (strlencmp(cmd, "expand_toggle") == 0) {
4474                         res = video_expand_toggle();
4475                         if (res)
4476                                 return res;
4477                 } else
4478                         return -EINVAL;
4479         }
4480
4481         if (enable || disable) {
4482                 status = video_outputsw_get();
4483                 if (status < 0)
4484                         return status;
4485                 res = video_outputsw_set((status & ~disable) | enable);
4486                 if (res)
4487                         return res;
4488         }
4489
4490         return 0;
4491 }
4492
4493 static struct ibm_struct video_driver_data = {
4494         .name = "video",
4495         .read = video_read,
4496         .write = video_write,
4497         .exit = video_exit,
4498 };
4499
4500 #endif /* CONFIG_THINKPAD_ACPI_VIDEO */
4501
4502 /*************************************************************************
4503  * Light (thinklight) subdriver
4504  */
4505
4506 TPACPI_HANDLE(lght, root, "\\LGHT");    /* A21e, A2xm/p, T20-22, X20-21 */
4507 TPACPI_HANDLE(ledb, ec, "LEDB");                /* G4x */
4508
4509 static int light_get_status(void)
4510 {
4511         int status = 0;
4512
4513         if (tp_features.light_status) {
4514                 if (!acpi_evalf(ec_handle, &status, "KBLT", "d"))
4515                         return -EIO;
4516                 return (!!status);
4517         }
4518
4519         return -ENXIO;
4520 }
4521
4522 static int light_set_status(int status)
4523 {
4524         int rc;
4525
4526         if (tp_features.light) {
4527                 if (cmos_handle) {
4528                         rc = acpi_evalf(cmos_handle, NULL, NULL, "vd",
4529                                         (status)?
4530                                                 TP_CMOS_THINKLIGHT_ON :
4531                                                 TP_CMOS_THINKLIGHT_OFF);
4532                 } else {
4533                         rc = acpi_evalf(lght_handle, NULL, NULL, "vd",
4534                                         (status)? 1 : 0);
4535                 }
4536                 return (rc)? 0 : -EIO;
4537         }
4538
4539         return -ENXIO;
4540 }
4541
4542 static void light_set_status_worker(struct work_struct *work)
4543 {
4544         struct tpacpi_led_classdev *data =
4545                         container_of(work, struct tpacpi_led_classdev, work);
4546
4547         if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING))
4548                 light_set_status((data->new_state != TPACPI_LED_OFF));
4549 }
4550
4551 static void light_sysfs_set(struct led_classdev *led_cdev,
4552                         enum led_brightness brightness)
4553 {
4554         struct tpacpi_led_classdev *data =
4555                 container_of(led_cdev,
4556                              struct tpacpi_led_classdev,
4557                              led_classdev);
4558         data->new_state = (brightness != LED_OFF) ?
4559                                 TPACPI_LED_ON : TPACPI_LED_OFF;
4560         queue_work(tpacpi_wq, &data->work);
4561 }
4562
4563 static enum led_brightness light_sysfs_get(struct led_classdev *led_cdev)
4564 {
4565         return (light_get_status() == 1)? LED_FULL : LED_OFF;
4566 }
4567
4568 static struct tpacpi_led_classdev tpacpi_led_thinklight = {
4569         .led_classdev = {
4570                 .name           = "tpacpi::thinklight",
4571                 .brightness_set = &light_sysfs_set,
4572                 .brightness_get = &light_sysfs_get,
4573         }
4574 };
4575
4576 static int __init light_init(struct ibm_init_struct *iibm)
4577 {
4578         int rc;
4579
4580         vdbg_printk(TPACPI_DBG_INIT, "initializing light subdriver\n");
4581
4582         TPACPI_ACPIHANDLE_INIT(ledb);
4583         TPACPI_ACPIHANDLE_INIT(lght);
4584         TPACPI_ACPIHANDLE_INIT(cmos);
4585         INIT_WORK(&tpacpi_led_thinklight.work, light_set_status_worker);
4586
4587         /* light not supported on 570, 600e/x, 770e, 770x, G4x, R30, R31 */
4588         tp_features.light = (cmos_handle || lght_handle) && !ledb_handle;
4589
4590         if (tp_features.light)
4591                 /* light status not supported on
4592                    570, 600e/x, 770e, 770x, G4x, R30, R31, R32, X20 */
4593                 tp_features.light_status =
4594                         acpi_evalf(ec_handle, NULL, "KBLT", "qv");
4595
4596         vdbg_printk(TPACPI_DBG_INIT, "light is %s, light status is %s\n",
4597                 str_supported(tp_features.light),
4598                 str_supported(tp_features.light_status));
4599
4600         if (!tp_features.light)
4601                 return 1;
4602
4603         rc = led_classdev_register(&tpacpi_pdev->dev,
4604                                    &tpacpi_led_thinklight.led_classdev);
4605
4606         if (rc < 0) {
4607                 tp_features.light = 0;
4608                 tp_features.light_status = 0;
4609         } else  {
4610                 rc = 0;
4611         }
4612
4613         return rc;
4614 }
4615
4616 static void light_exit(void)
4617 {
4618         led_classdev_unregister(&tpacpi_led_thinklight.led_classdev);
4619         if (work_pending(&tpacpi_led_thinklight.work))
4620                 flush_workqueue(tpacpi_wq);
4621 }
4622
4623 static int light_read(char *p)
4624 {
4625         int len = 0;
4626         int status;
4627
4628         if (!tp_features.light) {
4629                 len += sprintf(p + len, "status:\t\tnot supported\n");
4630         } else if (!tp_features.light_status) {
4631                 len += sprintf(p + len, "status:\t\tunknown\n");
4632                 len += sprintf(p + len, "commands:\ton, off\n");
4633         } else {
4634                 status = light_get_status();
4635                 if (status < 0)
4636                         return status;
4637                 len += sprintf(p + len, "status:\t\t%s\n", onoff(status, 0));
4638                 len += sprintf(p + len, "commands:\ton, off\n");
4639         }
4640
4641         return len;
4642 }
4643
4644 static int light_write(char *buf)
4645 {
4646         char *cmd;
4647         int newstatus = 0;
4648
4649         if (!tp_features.light)
4650                 return -ENODEV;
4651
4652         while ((cmd = next_cmd(&buf))) {
4653                 if (strlencmp(cmd, "on") == 0) {
4654                         newstatus = 1;
4655                 } else if (strlencmp(cmd, "off") == 0) {
4656                         newstatus = 0;
4657                 } else
4658                         return -EINVAL;
4659         }
4660
4661         return light_set_status(newstatus);
4662 }
4663
4664 static struct ibm_struct light_driver_data = {
4665         .name = "light",
4666         .read = light_read,
4667         .write = light_write,
4668         .exit = light_exit,
4669 };
4670
4671 /*************************************************************************
4672  * CMOS subdriver
4673  */
4674
4675 /* sysfs cmos_command -------------------------------------------------- */
4676 static ssize_t cmos_command_store(struct device *dev,
4677                             struct device_attribute *attr,
4678                             const char *buf, size_t count)
4679 {
4680         unsigned long cmos_cmd;
4681         int res;
4682
4683         if (parse_strtoul(buf, 21, &cmos_cmd))
4684                 return -EINVAL;
4685
4686         res = issue_thinkpad_cmos_command(cmos_cmd);
4687         return (res)? res : count;
4688 }
4689
4690 static struct device_attribute dev_attr_cmos_command =
4691         __ATTR(cmos_command, S_IWUSR, NULL, cmos_command_store);
4692
4693 /* --------------------------------------------------------------------- */
4694
4695 static int __init cmos_init(struct ibm_init_struct *iibm)
4696 {
4697         int res;
4698
4699         vdbg_printk(TPACPI_DBG_INIT,
4700                 "initializing cmos commands subdriver\n");
4701
4702         TPACPI_ACPIHANDLE_INIT(cmos);
4703
4704         vdbg_printk(TPACPI_DBG_INIT, "cmos commands are %s\n",
4705                 str_supported(cmos_handle != NULL));
4706
4707         res = device_create_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
4708         if (res)
4709                 return res;
4710
4711         return (cmos_handle)? 0 : 1;
4712 }
4713
4714 static void cmos_exit(void)
4715 {
4716         device_remove_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
4717 }
4718
4719 static int cmos_read(char *p)
4720 {
4721         int len = 0;
4722
4723         /* cmos not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
4724            R30, R31, T20-22, X20-21 */
4725         if (!cmos_handle)
4726                 len += sprintf(p + len, "status:\t\tnot supported\n");
4727         else {
4728                 len += sprintf(p + len, "status:\t\tsupported\n");
4729                 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-21)\n");
4730         }
4731
4732         return len;
4733 }
4734
4735 static int cmos_write(char *buf)
4736 {
4737         char *cmd;
4738         int cmos_cmd, res;
4739
4740         while ((cmd = next_cmd(&buf))) {
4741                 if (sscanf(cmd, "%u", &cmos_cmd) == 1 &&
4742                     cmos_cmd >= 0 && cmos_cmd <= 21) {
4743                         /* cmos_cmd set */
4744                 } else
4745                         return -EINVAL;
4746
4747                 res = issue_thinkpad_cmos_command(cmos_cmd);
4748                 if (res)
4749                         return res;
4750         }
4751
4752         return 0;
4753 }
4754
4755 static struct ibm_struct cmos_driver_data = {
4756         .name = "cmos",
4757         .read = cmos_read,
4758         .write = cmos_write,
4759         .exit = cmos_exit,
4760 };
4761
4762 /*************************************************************************
4763  * LED subdriver
4764  */
4765
4766 enum led_access_mode {
4767         TPACPI_LED_NONE = 0,
4768         TPACPI_LED_570, /* 570 */
4769         TPACPI_LED_OLD, /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
4770         TPACPI_LED_NEW, /* all others */
4771 };
4772
4773 enum {  /* For TPACPI_LED_OLD */
4774         TPACPI_LED_EC_HLCL = 0x0c,      /* EC reg to get led to power on */
4775         TPACPI_LED_EC_HLBL = 0x0d,      /* EC reg to blink a lit led */
4776         TPACPI_LED_EC_HLMS = 0x0e,      /* EC reg to select led to command */
4777 };
4778
4779 static enum led_access_mode led_supported;
4780
4781 TPACPI_HANDLE(led, ec, "SLED",  /* 570 */
4782            "SYSL",              /* 600e/x, 770e, 770x, A21e, A2xm/p, */
4783                                 /* T20-22, X20-21 */
4784            "LED",               /* all others */
4785            );                   /* R30, R31 */
4786
4787 #define TPACPI_LED_NUMLEDS 16
4788 static struct tpacpi_led_classdev *tpacpi_leds;
4789 static enum led_status_t tpacpi_led_state_cache[TPACPI_LED_NUMLEDS];
4790 static const char * const tpacpi_led_names[TPACPI_LED_NUMLEDS] = {
4791         /* there's a limit of 19 chars + NULL before 2.6.26 */
4792         "tpacpi::power",
4793         "tpacpi:orange:batt",
4794         "tpacpi:green:batt",
4795         "tpacpi::dock_active",
4796         "tpacpi::bay_active",
4797         "tpacpi::dock_batt",
4798         "tpacpi::unknown_led",
4799         "tpacpi::standby",
4800         "tpacpi::dock_status1",
4801         "tpacpi::dock_status2",
4802         "tpacpi::unknown_led2",
4803         "tpacpi::unknown_led3",
4804         "tpacpi::thinkvantage",
4805 };
4806 #define TPACPI_SAFE_LEDS        0x1081U
4807
4808 static inline bool tpacpi_is_led_restricted(const unsigned int led)
4809 {
4810 #ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS
4811         return false;
4812 #else
4813         return (1U & (TPACPI_SAFE_LEDS >> led)) == 0;
4814 #endif
4815 }
4816
4817 static int led_get_status(const unsigned int led)
4818 {
4819         int status;
4820         enum led_status_t led_s;
4821
4822         switch (led_supported) {
4823         case TPACPI_LED_570:
4824                 if (!acpi_evalf(ec_handle,
4825                                 &status, "GLED", "dd", 1 << led))
4826                         return -EIO;
4827                 led_s = (status == 0)?
4828                                 TPACPI_LED_OFF :
4829                                 ((status == 1)?
4830                                         TPACPI_LED_ON :
4831                                         TPACPI_LED_BLINK);
4832                 tpacpi_led_state_cache[led] = led_s;
4833                 return led_s;
4834         default:
4835                 return -ENXIO;
4836         }
4837
4838         /* not reached */
4839 }
4840
4841 static int led_set_status(const unsigned int led,
4842                           const enum led_status_t ledstatus)
4843 {
4844         /* off, on, blink. Index is led_status_t */
4845         static const unsigned int led_sled_arg1[] = { 0, 1, 3 };
4846         static const unsigned int led_led_arg1[] = { 0, 0x80, 0xc0 };
4847
4848         int rc = 0;
4849
4850         switch (led_supported) {
4851         case TPACPI_LED_570:
4852                 /* 570 */
4853                 if (unlikely(led > 7))
4854                         return -EINVAL;
4855                 if (unlikely(tpacpi_is_led_restricted(led)))
4856                         return -EPERM;
4857                 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
4858                                 (1 << led), led_sled_arg1[ledstatus]))
4859                         rc = -EIO;
4860                 break;
4861         case TPACPI_LED_OLD:
4862                 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */
4863                 if (unlikely(led > 7))
4864                         return -EINVAL;
4865                 if (unlikely(tpacpi_is_led_restricted(led)))
4866                         return -EPERM;
4867                 rc = ec_write(TPACPI_LED_EC_HLMS, (1 << led));
4868                 if (rc >= 0)
4869                         rc = ec_write(TPACPI_LED_EC_HLBL,
4870                                       (ledstatus == TPACPI_LED_BLINK) << led);
4871                 if (rc >= 0)
4872                         rc = ec_write(TPACPI_LED_EC_HLCL,
4873                                       (ledstatus != TPACPI_LED_OFF) << led);
4874                 break;
4875         case TPACPI_LED_NEW:
4876                 /* all others */
4877                 if (unlikely(led >= TPACPI_LED_NUMLEDS))
4878                         return -EINVAL;
4879                 if (unlikely(tpacpi_is_led_restricted(led)))
4880                         return -EPERM;
4881                 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
4882                                 led, led_led_arg1[ledstatus]))
4883                         rc = -EIO;
4884                 break;
4885         default:
4886                 rc = -ENXIO;
4887         }
4888
4889         if (!rc)
4890                 tpacpi_led_state_cache[led] = ledstatus;
4891
4892         return rc;
4893 }
4894
4895 static void led_set_status_worker(struct work_struct *work)
4896 {
4897         struct tpacpi_led_classdev *data =
4898                 container_of(work, struct tpacpi_led_classdev, work);
4899
4900         if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING))
4901                 led_set_status(data->led, data->new_state);
4902 }
4903
4904 static void led_sysfs_set(struct led_classdev *led_cdev,
4905                         enum led_brightness brightness)
4906 {
4907         struct tpacpi_led_classdev *data = container_of(led_cdev,
4908                              struct tpacpi_led_classdev, led_classdev);
4909
4910         if (brightness == LED_OFF)
4911                 data->new_state = TPACPI_LED_OFF;
4912         else if (tpacpi_led_state_cache[data->led] != TPACPI_LED_BLINK)
4913                 data->new_state = TPACPI_LED_ON;
4914         else
4915                 data->new_state = TPACPI_LED_BLINK;
4916
4917         queue_work(tpacpi_wq, &data->work);
4918 }
4919
4920 static int led_sysfs_blink_set(struct led_classdev *led_cdev,
4921                         unsigned long *delay_on, unsigned long *delay_off)
4922 {
4923         struct tpacpi_led_classdev *data = container_of(led_cdev,
4924                              struct tpacpi_led_classdev, led_classdev);
4925
4926         /* Can we choose the flash rate? */
4927         if (*delay_on == 0 && *delay_off == 0) {
4928                 /* yes. set them to the hardware blink rate (1 Hz) */
4929                 *delay_on = 500; /* ms */
4930                 *delay_off = 500; /* ms */
4931         } else if ((*delay_on != 500) || (*delay_off != 500))
4932                 return -EINVAL;
4933
4934         data->new_state = TPACPI_LED_BLINK;
4935         queue_work(tpacpi_wq, &data->work);
4936
4937         return 0;
4938 }
4939
4940 static enum led_brightness led_sysfs_get(struct led_classdev *led_cdev)
4941 {
4942         int rc;
4943
4944         struct tpacpi_led_classdev *data = container_of(led_cdev,
4945                              struct tpacpi_led_classdev, led_classdev);
4946
4947         rc = led_get_status(data->led);
4948
4949         if (rc == TPACPI_LED_OFF || rc < 0)
4950                 rc = LED_OFF;   /* no error handling in led class :( */
4951         else
4952                 rc = LED_FULL;
4953
4954         return rc;
4955 }
4956
4957 static void led_exit(void)
4958 {
4959         unsigned int i;
4960
4961         for (i = 0; i < TPACPI_LED_NUMLEDS; i++) {
4962                 if (tpacpi_leds[i].led_classdev.name)
4963                         led_classdev_unregister(&tpacpi_leds[i].led_classdev);
4964         }
4965
4966         kfree(tpacpi_leds);
4967 }
4968
4969 static int __init tpacpi_init_led(unsigned int led)
4970 {
4971         int rc;
4972
4973         tpacpi_leds[led].led = led;
4974
4975         /* LEDs with no name don't get registered */
4976         if (!tpacpi_led_names[led])
4977                 return 0;
4978
4979         tpacpi_leds[led].led_classdev.brightness_set = &led_sysfs_set;
4980         tpacpi_leds[led].led_classdev.blink_set = &led_sysfs_blink_set;
4981         if (led_supported == TPACPI_LED_570)
4982                 tpacpi_leds[led].led_classdev.brightness_get =
4983                                                 &led_sysfs_get;
4984
4985         tpacpi_leds[led].led_classdev.name = tpacpi_led_names[led];
4986
4987         INIT_WORK(&tpacpi_leds[led].work, led_set_status_worker);
4988
4989         rc = led_classdev_register(&tpacpi_pdev->dev,
4990                                 &tpacpi_leds[led].led_classdev);
4991         if (rc < 0)
4992                 tpacpi_leds[led].led_classdev.name = NULL;
4993
4994         return rc;
4995 }
4996
4997 static const struct tpacpi_quirk led_useful_qtable[] __initconst = {
4998         TPACPI_Q_IBM('1', 'E', 0x009f), /* A30 */
4999         TPACPI_Q_IBM('1', 'N', 0x009f), /* A31 */
5000         TPACPI_Q_IBM('1', 'G', 0x009f), /* A31 */
5001
5002         TPACPI_Q_IBM('1', 'I', 0x0097), /* T30 */
5003         TPACPI_Q_IBM('1', 'R', 0x0097), /* T40, T41, T42, R50, R51 */
5004         TPACPI_Q_IBM('7', '0', 0x0097), /* T43, R52 */
5005         TPACPI_Q_IBM('1', 'Y', 0x0097), /* T43 */
5006         TPACPI_Q_IBM('1', 'W', 0x0097), /* R50e */
5007         TPACPI_Q_IBM('1', 'V', 0x0097), /* R51 */
5008         TPACPI_Q_IBM('7', '8', 0x0097), /* R51e */
5009         TPACPI_Q_IBM('7', '6', 0x0097), /* R52 */
5010
5011         TPACPI_Q_IBM('1', 'K', 0x00bf), /* X30 */
5012         TPACPI_Q_IBM('1', 'Q', 0x00bf), /* X31, X32 */
5013         TPACPI_Q_IBM('1', 'U', 0x00bf), /* X40 */
5014         TPACPI_Q_IBM('7', '4', 0x00bf), /* X41 */
5015         TPACPI_Q_IBM('7', '5', 0x00bf), /* X41t */
5016
5017         TPACPI_Q_IBM('7', '9', 0x1f97), /* T60 (1) */
5018         TPACPI_Q_IBM('7', '7', 0x1f97), /* Z60* (1) */
5019         TPACPI_Q_IBM('7', 'F', 0x1f97), /* Z61* (1) */
5020         TPACPI_Q_IBM('7', 'B', 0x1fb7), /* X60 (1) */
5021
5022         /* (1) - may have excess leds enabled on MSB */
5023
5024         /* Defaults (order matters, keep last, don't reorder!) */
5025         { /* Lenovo */
5026           .vendor = PCI_VENDOR_ID_LENOVO,
5027           .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY,
5028           .quirks = 0x1fffU,
5029         },
5030         { /* IBM ThinkPads with no EC version string */
5031           .vendor = PCI_VENDOR_ID_IBM,
5032           .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_UNKNOWN,
5033           .quirks = 0x00ffU,
5034         },
5035         { /* IBM ThinkPads with EC version string */
5036           .vendor = PCI_VENDOR_ID_IBM,
5037           .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY,
5038           .quirks = 0x00bfU,
5039         },
5040 };
5041
5042 #undef TPACPI_LEDQ_IBM
5043 #undef TPACPI_LEDQ_LNV
5044
5045 static int __init led_init(struct ibm_init_struct *iibm)
5046 {
5047         unsigned int i;
5048         int rc;
5049         unsigned long useful_leds;
5050
5051         vdbg_printk(TPACPI_DBG_INIT, "initializing LED subdriver\n");
5052
5053         TPACPI_ACPIHANDLE_INIT(led);
5054
5055         if (!led_handle)
5056                 /* led not supported on R30, R31 */
5057                 led_supported = TPACPI_LED_NONE;
5058         else if (strlencmp(led_path, "SLED") == 0)
5059                 /* 570 */
5060                 led_supported = TPACPI_LED_570;
5061         else if (strlencmp(led_path, "SYSL") == 0)
5062                 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
5063                 led_supported = TPACPI_LED_OLD;
5064         else
5065                 /* all others */
5066                 led_supported = TPACPI_LED_NEW;
5067
5068         vdbg_printk(TPACPI_DBG_INIT, "LED commands are %s, mode %d\n",
5069                 str_supported(led_supported), led_supported);
5070
5071         if (led_supported == TPACPI_LED_NONE)
5072                 return 1;
5073
5074         tpacpi_leds = kzalloc(sizeof(*tpacpi_leds) * TPACPI_LED_NUMLEDS,
5075                               GFP_KERNEL);
5076         if (!tpacpi_leds) {
5077                 printk(TPACPI_ERR "Out of memory for LED data\n");
5078                 return -ENOMEM;
5079         }
5080
5081         useful_leds = tpacpi_check_quirks(led_useful_qtable,
5082                                           ARRAY_SIZE(led_useful_qtable));
5083
5084         for (i = 0; i < TPACPI_LED_NUMLEDS; i++) {
5085                 if (!tpacpi_is_led_restricted(i) &&
5086                     test_bit(i, &useful_leds)) {
5087                         rc = tpacpi_init_led(i);
5088                         if (rc < 0) {
5089                                 led_exit();
5090                                 return rc;
5091                         }
5092                 }
5093         }
5094
5095 #ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS
5096         printk(TPACPI_NOTICE
5097                 "warning: userspace override of important "
5098                 "firmware LEDs is enabled\n");
5099 #endif
5100         return 0;
5101 }
5102
5103 #define str_led_status(s) \
5104         ((s) == TPACPI_LED_OFF ? "off" : \
5105                 ((s) == TPACPI_LED_ON ? "on" : "blinking"))
5106
5107 static int led_read(char *p)
5108 {
5109         int len = 0;
5110
5111         if (!led_supported) {
5112                 len += sprintf(p + len, "status:\t\tnot supported\n");
5113                 return len;
5114         }
5115         len += sprintf(p + len, "status:\t\tsupported\n");
5116
5117         if (led_supported == TPACPI_LED_570) {
5118                 /* 570 */
5119                 int i, status;
5120                 for (i = 0; i < 8; i++) {
5121                         status = led_get_status(i);
5122                         if (status < 0)
5123                                 return -EIO;
5124                         len += sprintf(p + len, "%d:\t\t%s\n",
5125                                        i, str_led_status(status));
5126                 }
5127         }
5128
5129         len += sprintf(p + len, "commands:\t"
5130                        "<led> on, <led> off, <led> blink (<led> is 0-15)\n");
5131
5132         return len;
5133 }
5134
5135 static int led_write(char *buf)
5136 {
5137         char *cmd;
5138         int led, rc;
5139         enum led_status_t s;
5140
5141         if (!led_supported)
5142                 return -ENODEV;
5143
5144         while ((cmd = next_cmd(&buf))) {
5145                 if (sscanf(cmd, "%d", &led) != 1 || led < 0 || led > 15)
5146                         return -EINVAL;
5147
5148                 if (strstr(cmd, "off")) {
5149                         s = TPACPI_LED_OFF;
5150                 } else if (strstr(cmd, "on")) {
5151                         s = TPACPI_LED_ON;
5152                 } else if (strstr(cmd, "blink")) {
5153                         s = TPACPI_LED_BLINK;
5154                 } else {
5155                         return -EINVAL;
5156                 }
5157
5158                 rc = led_set_status(led, s);
5159                 if (rc < 0)
5160                         return rc;
5161         }
5162
5163         return 0;
5164 }
5165
5166 static struct ibm_struct led_driver_data = {
5167         .name = "led",
5168         .read = led_read,
5169         .write = led_write,
5170         .exit = led_exit,
5171 };
5172
5173 /*************************************************************************
5174  * Beep subdriver
5175  */
5176
5177 TPACPI_HANDLE(beep, ec, "BEEP");        /* all except R30, R31 */
5178
5179 #define TPACPI_BEEP_Q1 0x0001
5180
5181 static const struct tpacpi_quirk beep_quirk_table[] __initconst = {
5182         TPACPI_Q_IBM('I', 'M', TPACPI_BEEP_Q1), /* 570 */
5183         TPACPI_Q_IBM('I', 'U', TPACPI_BEEP_Q1), /* 570E - unverified */
5184 };
5185
5186 static int __init beep_init(struct ibm_init_struct *iibm)
5187 {
5188         unsigned long quirks;
5189
5190         vdbg_printk(TPACPI_DBG_INIT, "initializing beep subdriver\n");
5191
5192         TPACPI_ACPIHANDLE_INIT(beep);
5193
5194         vdbg_printk(TPACPI_DBG_INIT, "beep is %s\n",
5195                 str_supported(beep_handle != NULL));
5196
5197         quirks = tpacpi_check_quirks(beep_quirk_table,
5198                                      ARRAY_SIZE(beep_quirk_table));
5199
5200         tp_features.beep_needs_two_args = !!(quirks & TPACPI_BEEP_Q1);
5201
5202         return (beep_handle)? 0 : 1;
5203 }
5204
5205 static int beep_read(char *p)
5206 {
5207         int len = 0;
5208
5209         if (!beep_handle)
5210                 len += sprintf(p + len, "status:\t\tnot supported\n");
5211         else {
5212                 len += sprintf(p + len, "status:\t\tsupported\n");
5213                 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-17)\n");
5214         }
5215
5216         return len;
5217 }
5218
5219 static int beep_write(char *buf)
5220 {
5221         char *cmd;
5222         int beep_cmd;
5223
5224         if (!beep_handle)
5225                 return -ENODEV;
5226
5227         while ((cmd = next_cmd(&buf))) {
5228                 if (sscanf(cmd, "%u", &beep_cmd) == 1 &&
5229                     beep_cmd >= 0 && beep_cmd <= 17) {
5230                         /* beep_cmd set */
5231                 } else
5232                         return -EINVAL;
5233                 if (tp_features.beep_needs_two_args) {
5234                         if (!acpi_evalf(beep_handle, NULL, NULL, "vdd",
5235                                         beep_cmd, 0))
5236                                 return -EIO;
5237                 } else {
5238                         if (!acpi_evalf(beep_handle, NULL, NULL, "vd",
5239                                         beep_cmd))
5240                                 return -EIO;
5241                 }
5242         }
5243
5244         return 0;
5245 }
5246
5247 static struct ibm_struct beep_driver_data = {
5248         .name = "beep",
5249         .read = beep_read,
5250         .write = beep_write,
5251 };
5252
5253 /*************************************************************************
5254  * Thermal subdriver
5255  */
5256
5257 enum thermal_access_mode {
5258         TPACPI_THERMAL_NONE = 0,        /* No thermal support */
5259         TPACPI_THERMAL_ACPI_TMP07,      /* Use ACPI TMP0-7 */
5260         TPACPI_THERMAL_ACPI_UPDT,       /* Use ACPI TMP0-7 with UPDT */
5261         TPACPI_THERMAL_TPEC_8,          /* Use ACPI EC regs, 8 sensors */
5262         TPACPI_THERMAL_TPEC_16,         /* Use ACPI EC regs, 16 sensors */
5263 };
5264
5265 enum { /* TPACPI_THERMAL_TPEC_* */
5266         TP_EC_THERMAL_TMP0 = 0x78,      /* ACPI EC regs TMP 0..7 */
5267         TP_EC_THERMAL_TMP8 = 0xC0,      /* ACPI EC regs TMP 8..15 */
5268         TP_EC_THERMAL_TMP_NA = -128,    /* ACPI EC sensor not available */
5269 };
5270
5271 #define TPACPI_MAX_THERMAL_SENSORS 16   /* Max thermal sensors supported */
5272 struct ibm_thermal_sensors_struct {
5273         s32 temp[TPACPI_MAX_THERMAL_SENSORS];
5274 };
5275
5276 static enum thermal_access_mode thermal_read_mode;
5277
5278 /* idx is zero-based */
5279 static int thermal_get_sensor(int idx, s32 *value)
5280 {
5281         int t;
5282         s8 tmp;
5283         char tmpi[5];
5284
5285         t = TP_EC_THERMAL_TMP0;
5286
5287         switch (thermal_read_mode) {
5288 #if TPACPI_MAX_THERMAL_SENSORS >= 16
5289         case TPACPI_THERMAL_TPEC_16:
5290                 if (idx >= 8 && idx <= 15) {
5291                         t = TP_EC_THERMAL_TMP8;
5292                         idx -= 8;
5293                 }
5294                 /* fallthrough */
5295 #endif
5296         case TPACPI_THERMAL_TPEC_8:
5297                 if (idx <= 7) {
5298                         if (!acpi_ec_read(t + idx, &tmp))
5299                                 return -EIO;
5300                         *value = tmp * 1000;
5301                         return 0;
5302                 }
5303                 break;
5304
5305         case TPACPI_THERMAL_ACPI_UPDT:
5306                 if (idx <= 7) {
5307                         snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
5308                         if (!acpi_evalf(ec_handle, NULL, "UPDT", "v"))
5309                                 return -EIO;
5310                         if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
5311                                 return -EIO;
5312                         *value = (t - 2732) * 100;
5313                         return 0;
5314                 }
5315                 break;
5316
5317         case TPACPI_THERMAL_ACPI_TMP07:
5318                 if (idx <= 7) {
5319                         snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
5320                         if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
5321                                 return -EIO;
5322                         if (t > 127 || t < -127)
5323                                 t = TP_EC_THERMAL_TMP_NA;
5324                         *value = t * 1000;
5325                         return 0;
5326                 }
5327                 break;
5328
5329         case TPACPI_THERMAL_NONE:
5330         default:
5331                 return -ENOSYS;
5332         }
5333
5334         return -EINVAL;
5335 }
5336
5337 static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s)
5338 {
5339         int res, i;
5340         int n;
5341
5342         n = 8;
5343         i = 0;
5344
5345         if (!s)
5346                 return -EINVAL;
5347
5348         if (thermal_read_mode == TPACPI_THERMAL_TPEC_16)
5349                 n = 16;
5350
5351         for (i = 0 ; i < n; i++) {
5352                 res = thermal_get_sensor(i, &s->temp[i]);
5353                 if (res)
5354                         return res;
5355         }
5356
5357         return n;
5358 }
5359
5360 /* sysfs temp##_input -------------------------------------------------- */
5361
5362 static ssize_t thermal_temp_input_show(struct device *dev,
5363                            struct device_attribute *attr,
5364                            char *buf)
5365 {
5366         struct sensor_device_attribute *sensor_attr =
5367                                         to_sensor_dev_attr(attr);
5368         int idx = sensor_attr->index;
5369         s32 value;
5370         int res;
5371
5372         res = thermal_get_sensor(idx, &value);
5373         if (res)
5374                 return res;
5375         if (value == TP_EC_THERMAL_TMP_NA * 1000)
5376                 return -ENXIO;
5377
5378         return snprintf(buf, PAGE_SIZE, "%d\n", value);
5379 }
5380
5381 #define THERMAL_SENSOR_ATTR_TEMP(_idxA, _idxB) \
5382          SENSOR_ATTR(temp##_idxA##_input, S_IRUGO, \
5383                      thermal_temp_input_show, NULL, _idxB)
5384
5385 static struct sensor_device_attribute sensor_dev_attr_thermal_temp_input[] = {
5386         THERMAL_SENSOR_ATTR_TEMP(1, 0),
5387         THERMAL_SENSOR_ATTR_TEMP(2, 1),
5388         THERMAL_SENSOR_ATTR_TEMP(3, 2),
5389         THERMAL_SENSOR_ATTR_TEMP(4, 3),
5390         THERMAL_SENSOR_ATTR_TEMP(5, 4),
5391         THERMAL_SENSOR_ATTR_TEMP(6, 5),
5392         THERMAL_SENSOR_ATTR_TEMP(7, 6),
5393         THERMAL_SENSOR_ATTR_TEMP(8, 7),
5394         THERMAL_SENSOR_ATTR_TEMP(9, 8),
5395         THERMAL_SENSOR_ATTR_TEMP(10, 9),
5396         THERMAL_SENSOR_ATTR_TEMP(11, 10),
5397         THERMAL_SENSOR_ATTR_TEMP(12, 11),
5398         THERMAL_SENSOR_ATTR_TEMP(13, 12),
5399         THERMAL_SENSOR_ATTR_TEMP(14, 13),
5400         THERMAL_SENSOR_ATTR_TEMP(15, 14),
5401         THERMAL_SENSOR_ATTR_TEMP(16, 15),
5402 };
5403
5404 #define THERMAL_ATTRS(X) \
5405         &sensor_dev_attr_thermal_temp_input[X].dev_attr.attr
5406
5407 static struct attribute *thermal_temp_input_attr[] = {
5408         THERMAL_ATTRS(8),
5409         THERMAL_ATTRS(9),
5410         THERMAL_ATTRS(10),
5411         THERMAL_ATTRS(11),
5412         THERMAL_ATTRS(12),
5413         THERMAL_ATTRS(13),
5414         THERMAL_ATTRS(14),
5415         THERMAL_ATTRS(15),
5416         THERMAL_ATTRS(0),
5417         THERMAL_ATTRS(1),
5418         THERMAL_ATTRS(2),
5419         THERMAL_ATTRS(3),
5420         THERMAL_ATTRS(4),
5421         THERMAL_ATTRS(5),
5422         THERMAL_ATTRS(6),
5423         THERMAL_ATTRS(7),
5424         NULL
5425 };
5426
5427 static const struct attribute_group thermal_temp_input16_group = {
5428         .attrs = thermal_temp_input_attr
5429 };
5430
5431 static const struct attribute_group thermal_temp_input8_group = {
5432         .attrs = &thermal_temp_input_attr[8]
5433 };
5434
5435 #undef THERMAL_SENSOR_ATTR_TEMP
5436 #undef THERMAL_ATTRS
5437
5438 /* --------------------------------------------------------------------- */
5439
5440 static int __init thermal_init(struct ibm_init_struct *iibm)
5441 {
5442         u8 t, ta1, ta2;
5443         int i;
5444         int acpi_tmp7;
5445         int res;
5446
5447         vdbg_printk(TPACPI_DBG_INIT, "initializing thermal subdriver\n");
5448
5449         acpi_tmp7 = acpi_evalf(ec_handle, NULL, "TMP7", "qv");
5450
5451         if (thinkpad_id.ec_model) {
5452                 /*
5453                  * Direct EC access mode: sensors at registers
5454                  * 0x78-0x7F, 0xC0-0xC7.  Registers return 0x00 for
5455                  * non-implemented, thermal sensors return 0x80 when
5456                  * not available
5457                  */
5458
5459                 ta1 = ta2 = 0;
5460                 for (i = 0; i < 8; i++) {
5461                         if (acpi_ec_read(TP_EC_THERMAL_TMP0 + i, &t)) {
5462                                 ta1 |= t;
5463                         } else {
5464                                 ta1 = 0;
5465                                 break;
5466                         }
5467                         if (acpi_ec_read(TP_EC_THERMAL_TMP8 + i, &t)) {
5468                                 ta2 |= t;
5469                         } else {
5470                                 ta1 = 0;
5471                                 break;
5472                         }
5473                 }
5474                 if (ta1 == 0) {
5475                         /* This is sheer paranoia, but we handle it anyway */
5476                         if (acpi_tmp7) {
5477                                 printk(TPACPI_ERR
5478                                        "ThinkPad ACPI EC access misbehaving, "
5479                                        "falling back to ACPI TMPx access "
5480                                        "mode\n");
5481                                 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
5482                         } else {
5483                                 printk(TPACPI_ERR
5484                                        "ThinkPad ACPI EC access misbehaving, "
5485                                        "disabling thermal sensors access\n");
5486                                 thermal_read_mode = TPACPI_THERMAL_NONE;
5487                         }
5488                 } else {
5489                         thermal_read_mode =
5490                             (ta2 != 0) ?
5491                             TPACPI_THERMAL_TPEC_16 : TPACPI_THERMAL_TPEC_8;
5492                 }
5493         } else if (acpi_tmp7) {
5494                 if (acpi_evalf(ec_handle, NULL, "UPDT", "qv")) {
5495                         /* 600e/x, 770e, 770x */
5496                         thermal_read_mode = TPACPI_THERMAL_ACPI_UPDT;
5497                 } else {
5498                         /* Standard ACPI TMPx access, max 8 sensors */
5499                         thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
5500                 }
5501         } else {
5502                 /* temperatures not supported on 570, G4x, R30, R31, R32 */
5503                 thermal_read_mode = TPACPI_THERMAL_NONE;
5504         }
5505
5506         vdbg_printk(TPACPI_DBG_INIT, "thermal is %s, mode %d\n",
5507                 str_supported(thermal_read_mode != TPACPI_THERMAL_NONE),
5508                 thermal_read_mode);
5509
5510         switch (thermal_read_mode) {
5511         case TPACPI_THERMAL_TPEC_16:
5512                 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
5513                                 &thermal_temp_input16_group);
5514                 if (res)
5515                         return res;
5516                 break;
5517         case TPACPI_THERMAL_TPEC_8:
5518         case TPACPI_THERMAL_ACPI_TMP07:
5519         case TPACPI_THERMAL_ACPI_UPDT:
5520                 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
5521                                 &thermal_temp_input8_group);
5522                 if (res)
5523                         return res;
5524                 break;
5525         case TPACPI_THERMAL_NONE:
5526         default:
5527                 return 1;
5528         }
5529
5530         return 0;
5531 }
5532
5533 static void thermal_exit(void)
5534 {
5535         switch (thermal_read_mode) {
5536         case TPACPI_THERMAL_TPEC_16:
5537                 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
5538                                    &thermal_temp_input16_group);
5539                 break;
5540         case TPACPI_THERMAL_TPEC_8:
5541         case TPACPI_THERMAL_ACPI_TMP07:
5542         case TPACPI_THERMAL_ACPI_UPDT:
5543                 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
5544                                    &thermal_temp_input16_group);
5545                 break;
5546         case TPACPI_THERMAL_NONE:
5547         default:
5548                 break;
5549         }
5550 }
5551
5552 static int thermal_read(char *p)
5553 {
5554         int len = 0;
5555         int n, i;
5556         struct ibm_thermal_sensors_struct t;
5557
5558         n = thermal_get_sensors(&t);
5559         if (unlikely(n < 0))
5560                 return n;
5561
5562         len += sprintf(p + len, "temperatures:\t");
5563
5564         if (n > 0) {
5565                 for (i = 0; i < (n - 1); i++)
5566                         len += sprintf(p + len, "%d ", t.temp[i] / 1000);
5567                 len += sprintf(p + len, "%d\n", t.temp[i] / 1000);
5568         } else
5569                 len += sprintf(p + len, "not supported\n");
5570
5571         return len;
5572 }
5573
5574 static struct ibm_struct thermal_driver_data = {
5575         .name = "thermal",
5576         .read = thermal_read,
5577         .exit = thermal_exit,
5578 };
5579
5580 /*************************************************************************
5581  * EC Dump subdriver
5582  */
5583
5584 static u8 ecdump_regs[256];
5585
5586 static int ecdump_read(char *p)
5587 {
5588         int len = 0;
5589         int i, j;
5590         u8 v;
5591
5592         len += sprintf(p + len, "EC      "
5593                        " +00 +01 +02 +03 +04 +05 +06 +07"
5594                        " +08 +09 +0a +0b +0c +0d +0e +0f\n");
5595         for (i = 0; i < 256; i += 16) {
5596                 len += sprintf(p + len, "EC 0x%02x:", i);
5597                 for (j = 0; j < 16; j++) {
5598                         if (!acpi_ec_read(i + j, &v))
5599                                 break;
5600                         if (v != ecdump_regs[i + j])
5601                                 len += sprintf(p + len, " *%02x", v);
5602                         else
5603                                 len += sprintf(p + len, "  %02x", v);
5604                         ecdump_regs[i + j] = v;
5605                 }
5606                 len += sprintf(p + len, "\n");
5607                 if (j != 16)
5608                         break;
5609         }
5610
5611         /* These are way too dangerous to advertise openly... */
5612 #if 0
5613         len += sprintf(p + len, "commands:\t0x<offset> 0x<value>"
5614                        " (<offset> is 00-ff, <value> is 00-ff)\n");
5615         len += sprintf(p + len, "commands:\t0x<offset> <value>  "
5616                        " (<offset> is 00-ff, <value> is 0-255)\n");
5617 #endif
5618         return len;
5619 }
5620
5621 static int ecdump_write(char *buf)
5622 {
5623         char *cmd;
5624         int i, v;
5625
5626         while ((cmd = next_cmd(&buf))) {
5627                 if (sscanf(cmd, "0x%x 0x%x", &i, &v) == 2) {
5628                         /* i and v set */
5629                 } else if (sscanf(cmd, "0x%x %u", &i, &v) == 2) {
5630                         /* i and v set */
5631                 } else
5632                         return -EINVAL;
5633                 if (i >= 0 && i < 256 && v >= 0 && v < 256) {
5634                         if (!acpi_ec_write(i, v))
5635                                 return -EIO;
5636                 } else
5637                         return -EINVAL;
5638         }
5639
5640         return 0;
5641 }
5642
5643 static struct ibm_struct ecdump_driver_data = {
5644         .name = "ecdump",
5645         .read = ecdump_read,
5646         .write = ecdump_write,
5647         .flags.experimental = 1,
5648 };
5649
5650 /*************************************************************************
5651  * Backlight/brightness subdriver
5652  */
5653
5654 #define TPACPI_BACKLIGHT_DEV_NAME "thinkpad_screen"
5655
5656 /*
5657  * ThinkPads can read brightness from two places: EC HBRV (0x31), or
5658  * CMOS NVRAM byte 0x5E, bits 0-3.
5659  *
5660  * EC HBRV (0x31) has the following layout
5661  *   Bit 7: unknown function
5662  *   Bit 6: unknown function
5663  *   Bit 5: Z: honour scale changes, NZ: ignore scale changes
5664  *   Bit 4: must be set to zero to avoid problems
5665  *   Bit 3-0: backlight brightness level
5666  *
5667  * brightness_get_raw returns status data in the HBRV layout
5668  *
5669  * WARNING: The X61 has been verified to use HBRV for something else, so
5670  * this should be used _only_ on IBM ThinkPads, and maybe with some careful
5671  * testing on the very early *60 Lenovo models...
5672  */
5673
5674 enum {
5675         TP_EC_BACKLIGHT = 0x31,
5676
5677         /* TP_EC_BACKLIGHT bitmasks */
5678         TP_EC_BACKLIGHT_LVLMSK = 0x1F,
5679         TP_EC_BACKLIGHT_CMDMSK = 0xE0,
5680         TP_EC_BACKLIGHT_MAPSW = 0x20,
5681 };
5682
5683 enum tpacpi_brightness_access_mode {
5684         TPACPI_BRGHT_MODE_AUTO = 0,     /* Not implemented yet */
5685         TPACPI_BRGHT_MODE_EC,           /* EC control */
5686         TPACPI_BRGHT_MODE_UCMS_STEP,    /* UCMS step-based control */
5687         TPACPI_BRGHT_MODE_ECNVRAM,      /* EC control w/ NVRAM store */
5688         TPACPI_BRGHT_MODE_MAX
5689 };
5690
5691 static struct backlight_device *ibm_backlight_device;
5692
5693 static enum tpacpi_brightness_access_mode brightness_mode =
5694                 TPACPI_BRGHT_MODE_MAX;
5695
5696 static unsigned int brightness_enable = 2; /* 2 = auto, 0 = no, 1 = yes */
5697
5698 static struct mutex brightness_mutex;
5699
5700 /* NVRAM brightness access,
5701  * call with brightness_mutex held! */
5702 static unsigned int tpacpi_brightness_nvram_get(void)
5703 {
5704         u8 lnvram;
5705
5706         lnvram = (nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS)
5707                   & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
5708                   >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
5709         lnvram &= (tp_features.bright_16levels) ? 0x0f : 0x07;
5710
5711         return lnvram;
5712 }
5713
5714 static void tpacpi_brightness_checkpoint_nvram(void)
5715 {
5716         u8 lec = 0;
5717         u8 b_nvram;
5718
5719         if (brightness_mode != TPACPI_BRGHT_MODE_ECNVRAM)
5720                 return;
5721
5722         vdbg_printk(TPACPI_DBG_BRGHT,
5723                 "trying to checkpoint backlight level to NVRAM...\n");
5724
5725         if (mutex_lock_killable(&brightness_mutex) < 0)
5726                 return;
5727
5728         if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
5729                 goto unlock;
5730         lec &= TP_EC_BACKLIGHT_LVLMSK;
5731         b_nvram = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS);
5732
5733         if (lec != ((b_nvram & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
5734                              >> TP_NVRAM_POS_LEVEL_BRIGHTNESS)) {
5735                 /* NVRAM needs update */
5736                 b_nvram &= ~(TP_NVRAM_MASK_LEVEL_BRIGHTNESS <<
5737                                 TP_NVRAM_POS_LEVEL_BRIGHTNESS);
5738                 b_nvram |= lec;
5739                 nvram_write_byte(b_nvram, TP_NVRAM_ADDR_BRIGHTNESS);
5740                 dbg_printk(TPACPI_DBG_BRGHT,
5741                            "updated NVRAM backlight level to %u (0x%02x)\n",
5742                            (unsigned int) lec, (unsigned int) b_nvram);
5743         } else
5744                 vdbg_printk(TPACPI_DBG_BRGHT,
5745                            "NVRAM backlight level already is %u (0x%02x)\n",
5746                            (unsigned int) lec, (unsigned int) b_nvram);
5747
5748 unlock:
5749         mutex_unlock(&brightness_mutex);
5750 }
5751
5752
5753 /* call with brightness_mutex held! */
5754 static int tpacpi_brightness_get_raw(int *status)
5755 {
5756         u8 lec = 0;
5757
5758         switch (brightness_mode) {
5759         case TPACPI_BRGHT_MODE_UCMS_STEP:
5760                 *status = tpacpi_brightness_nvram_get();
5761                 return 0;
5762         case TPACPI_BRGHT_MODE_EC:
5763         case TPACPI_BRGHT_MODE_ECNVRAM:
5764                 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
5765                         return -EIO;
5766                 *status = lec;
5767                 return 0;
5768         default:
5769                 return -ENXIO;
5770         }
5771 }
5772
5773 /* call with brightness_mutex held! */
5774 /* do NOT call with illegal backlight level value */
5775 static int tpacpi_brightness_set_ec(unsigned int value)
5776 {
5777         u8 lec = 0;
5778
5779         if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
5780                 return -EIO;
5781
5782         if (unlikely(!acpi_ec_write(TP_EC_BACKLIGHT,
5783                                 (lec & TP_EC_BACKLIGHT_CMDMSK) |
5784                                 (value & TP_EC_BACKLIGHT_LVLMSK))))
5785                 return -EIO;
5786
5787         return 0;
5788 }
5789
5790 /* call with brightness_mutex held! */
5791 static int tpacpi_brightness_set_ucmsstep(unsigned int value)
5792 {
5793         int cmos_cmd, inc;
5794         unsigned int current_value, i;
5795
5796         current_value = tpacpi_brightness_nvram_get();
5797
5798         if (value == current_value)
5799                 return 0;
5800
5801         cmos_cmd = (value > current_value) ?
5802                         TP_CMOS_BRIGHTNESS_UP :
5803                         TP_CMOS_BRIGHTNESS_DOWN;
5804         inc = (value > current_value) ? 1 : -1;
5805
5806         for (i = current_value; i != value; i += inc)
5807                 if (issue_thinkpad_cmos_command(cmos_cmd))
5808                         return -EIO;
5809
5810         return 0;
5811 }
5812
5813 /* May return EINTR which can always be mapped to ERESTARTSYS */
5814 static int brightness_set(unsigned int value)
5815 {
5816         int res;
5817
5818         if (value > ((tp_features.bright_16levels)? 15 : 7) ||
5819             value < 0)
5820                 return -EINVAL;
5821
5822         vdbg_printk(TPACPI_DBG_BRGHT,
5823                         "set backlight level to %d\n", value);
5824
5825         res = mutex_lock_killable(&brightness_mutex);
5826         if (res < 0)
5827                 return res;
5828
5829         switch (brightness_mode) {
5830         case TPACPI_BRGHT_MODE_EC:
5831         case TPACPI_BRGHT_MODE_ECNVRAM:
5832                 res = tpacpi_brightness_set_ec(value);
5833                 break;
5834         case TPACPI_BRGHT_MODE_UCMS_STEP:
5835                 res = tpacpi_brightness_set_ucmsstep(value);
5836                 break;
5837         default:
5838                 res = -ENXIO;
5839         }
5840
5841         mutex_unlock(&brightness_mutex);
5842         return res;
5843 }
5844
5845 /* sysfs backlight class ----------------------------------------------- */
5846
5847 static int brightness_update_status(struct backlight_device *bd)
5848 {
5849         unsigned int level =
5850                 (bd->props.fb_blank == FB_BLANK_UNBLANK &&
5851                  bd->props.power == FB_BLANK_UNBLANK) ?
5852                                 bd->props.brightness : 0;
5853
5854         dbg_printk(TPACPI_DBG_BRGHT,
5855                         "backlight: attempt to set level to %d\n",
5856                         level);
5857
5858         /* it is the backlight class's job (caller) to handle
5859          * EINTR and other errors properly */
5860         return brightness_set(level);
5861 }
5862
5863 static int brightness_get(struct backlight_device *bd)
5864 {
5865         int status, res;
5866
5867         res = mutex_lock_killable(&brightness_mutex);
5868         if (res < 0)
5869                 return 0;
5870
5871         res = tpacpi_brightness_get_raw(&status);
5872
5873         mutex_unlock(&brightness_mutex);
5874
5875         if (res < 0)
5876                 return 0;
5877
5878         return status & TP_EC_BACKLIGHT_LVLMSK;
5879 }
5880
5881 static struct backlight_ops ibm_backlight_data = {
5882         .get_brightness = brightness_get,
5883         .update_status  = brightness_update_status,
5884 };
5885
5886 /* --------------------------------------------------------------------- */
5887
5888 /*
5889  * These are only useful for models that have only one possibility
5890  * of GPU.  If the BIOS model handles both ATI and Intel, don't use
5891  * these quirks.
5892  */
5893 #define TPACPI_BRGHT_Q_NOEC     0x0001  /* Must NOT use EC HBRV */
5894 #define TPACPI_BRGHT_Q_EC       0x0002  /* Should or must use EC HBRV */
5895 #define TPACPI_BRGHT_Q_ASK      0x8000  /* Ask for user report */
5896
5897 static const struct tpacpi_quirk brightness_quirk_table[] __initconst = {
5898         /* Models with ATI GPUs known to require ECNVRAM mode */
5899         TPACPI_Q_IBM('1', 'Y', TPACPI_BRGHT_Q_EC),      /* T43/p ATI */
5900
5901         /* Models with ATI GPUs that can use ECNVRAM */
5902         TPACPI_Q_IBM('1', 'R', TPACPI_BRGHT_Q_EC),
5903         TPACPI_Q_IBM('1', 'Q', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
5904         TPACPI_Q_IBM('7', '6', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
5905         TPACPI_Q_IBM('7', '8', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
5906
5907         /* Models with Intel Extreme Graphics 2 */
5908         TPACPI_Q_IBM('1', 'U', TPACPI_BRGHT_Q_NOEC),
5909         TPACPI_Q_IBM('1', 'V', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_NOEC),
5910         TPACPI_Q_IBM('1', 'W', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_NOEC),
5911
5912         /* Models with Intel GMA900 */
5913         TPACPI_Q_IBM('7', '0', TPACPI_BRGHT_Q_NOEC),    /* T43, R52 */
5914         TPACPI_Q_IBM('7', '4', TPACPI_BRGHT_Q_NOEC),    /* X41 */
5915         TPACPI_Q_IBM('7', '5', TPACPI_BRGHT_Q_NOEC),    /* X41 Tablet */
5916 };
5917
5918 static int __init brightness_init(struct ibm_init_struct *iibm)
5919 {
5920         int b;
5921         unsigned long quirks;
5922
5923         vdbg_printk(TPACPI_DBG_INIT, "initializing brightness subdriver\n");
5924
5925         mutex_init(&brightness_mutex);
5926
5927         quirks = tpacpi_check_quirks(brightness_quirk_table,
5928                                 ARRAY_SIZE(brightness_quirk_table));
5929
5930         /*
5931          * We always attempt to detect acpi support, so as to switch
5932          * Lenovo Vista BIOS to ACPI brightness mode even if we are not
5933          * going to publish a backlight interface
5934          */
5935         b = tpacpi_check_std_acpi_brightness_support();
5936         if (b > 0) {
5937
5938                 if (acpi_video_backlight_support()) {
5939                         if (brightness_enable > 1) {
5940                                 printk(TPACPI_NOTICE
5941                                        "Standard ACPI backlight interface "
5942                                        "available, not loading native one.\n");
5943                                 return 1;
5944                         } else if (brightness_enable == 1) {
5945                                 printk(TPACPI_NOTICE
5946                                        "Backlight control force enabled, even if standard "
5947                                        "ACPI backlight interface is available\n");
5948                         }
5949                 } else {
5950                         if (brightness_enable > 1) {
5951                                 printk(TPACPI_NOTICE
5952                                        "Standard ACPI backlight interface not "
5953                                        "available, thinkpad_acpi native "
5954                                        "brightness control enabled\n");
5955                         }
5956                 }
5957         }
5958
5959         if (!brightness_enable) {
5960                 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT,
5961                            "brightness support disabled by "
5962                            "module parameter\n");
5963                 return 1;
5964         }
5965
5966         if (b > 16) {
5967                 printk(TPACPI_ERR
5968                        "Unsupported brightness interface, "
5969                        "please contact %s\n", TPACPI_MAIL);
5970                 return 1;
5971         }
5972         if (b == 16)
5973                 tp_features.bright_16levels = 1;
5974
5975         /*
5976          * Check for module parameter bogosity, note that we
5977          * init brightness_mode to TPACPI_BRGHT_MODE_MAX in order to be
5978          * able to detect "unspecified"
5979          */
5980         if (brightness_mode > TPACPI_BRGHT_MODE_MAX)
5981                 return -EINVAL;
5982
5983         /* TPACPI_BRGHT_MODE_AUTO not implemented yet, just use default */
5984         if (brightness_mode == TPACPI_BRGHT_MODE_AUTO ||
5985             brightness_mode == TPACPI_BRGHT_MODE_MAX) {
5986                 if (quirks & TPACPI_BRGHT_Q_EC)
5987                         brightness_mode = TPACPI_BRGHT_MODE_ECNVRAM;
5988                 else
5989                         brightness_mode = TPACPI_BRGHT_MODE_UCMS_STEP;
5990
5991                 dbg_printk(TPACPI_DBG_BRGHT,
5992                            "driver auto-selected brightness_mode=%d\n",
5993                            brightness_mode);
5994         }
5995
5996         /* Safety */
5997         if (thinkpad_id.vendor != PCI_VENDOR_ID_IBM &&
5998             (brightness_mode == TPACPI_BRGHT_MODE_ECNVRAM ||
5999              brightness_mode == TPACPI_BRGHT_MODE_EC))
6000                 return -EINVAL;
6001
6002         if (tpacpi_brightness_get_raw(&b) < 0)
6003                 return 1;
6004
6005         if (tp_features.bright_16levels)
6006                 printk(TPACPI_INFO
6007                        "detected a 16-level brightness capable ThinkPad\n");
6008
6009         ibm_backlight_device = backlight_device_register(
6010                                         TPACPI_BACKLIGHT_DEV_NAME, NULL, NULL,
6011                                         &ibm_backlight_data);
6012         if (IS_ERR(ibm_backlight_device)) {
6013                 printk(TPACPI_ERR "Could not register backlight device\n");
6014                 return PTR_ERR(ibm_backlight_device);
6015         }
6016         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT,
6017                         "brightness is supported\n");
6018
6019         if (quirks & TPACPI_BRGHT_Q_ASK) {
6020                 printk(TPACPI_NOTICE
6021                         "brightness: will use unverified default: "
6022                         "brightness_mode=%d\n", brightness_mode);
6023                 printk(TPACPI_NOTICE
6024                         "brightness: please report to %s whether it works well "
6025                         "or not on your ThinkPad\n", TPACPI_MAIL);
6026         }
6027
6028         ibm_backlight_device->props.max_brightness =
6029                                 (tp_features.bright_16levels)? 15 : 7;
6030         ibm_backlight_device->props.brightness = b & TP_EC_BACKLIGHT_LVLMSK;
6031         backlight_update_status(ibm_backlight_device);
6032
6033         return 0;
6034 }
6035
6036 static void brightness_suspend(pm_message_t state)
6037 {
6038         tpacpi_brightness_checkpoint_nvram();
6039 }
6040
6041 static void brightness_shutdown(void)
6042 {
6043         tpacpi_brightness_checkpoint_nvram();
6044 }
6045
6046 static void brightness_exit(void)
6047 {
6048         if (ibm_backlight_device) {
6049                 vdbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_BRGHT,
6050                             "calling backlight_device_unregister()\n");
6051                 backlight_device_unregister(ibm_backlight_device);
6052         }
6053
6054         tpacpi_brightness_checkpoint_nvram();
6055 }
6056
6057 static int brightness_read(char *p)
6058 {
6059         int len = 0;
6060         int level;
6061
6062         level = brightness_get(NULL);
6063         if (level < 0) {
6064                 len += sprintf(p + len, "level:\t\tunreadable\n");
6065         } else {
6066                 len += sprintf(p + len, "level:\t\t%d\n", level);
6067                 len += sprintf(p + len, "commands:\tup, down\n");
6068                 len += sprintf(p + len, "commands:\tlevel <level>"
6069                                " (<level> is 0-%d)\n",
6070                                (tp_features.bright_16levels) ? 15 : 7);
6071         }
6072
6073         return len;
6074 }
6075
6076 static int brightness_write(char *buf)
6077 {
6078         int level;
6079         int rc;
6080         char *cmd;
6081         int max_level = (tp_features.bright_16levels) ? 15 : 7;
6082
6083         level = brightness_get(NULL);
6084         if (level < 0)
6085                 return level;
6086
6087         while ((cmd = next_cmd(&buf))) {
6088                 if (strlencmp(cmd, "up") == 0) {
6089                         if (level < max_level)
6090                                 level++;
6091                 } else if (strlencmp(cmd, "down") == 0) {
6092                         if (level > 0)
6093                                 level--;
6094                 } else if (sscanf(cmd, "level %d", &level) == 1 &&
6095                            level >= 0 && level <= max_level) {
6096                         /* new level set */
6097                 } else
6098                         return -EINVAL;
6099         }
6100
6101         tpacpi_disclose_usertask("procfs brightness",
6102                         "set level to %d\n", level);
6103
6104         /*
6105          * Now we know what the final level should be, so we try to set it.
6106          * Doing it this way makes the syscall restartable in case of EINTR
6107          */
6108         rc = brightness_set(level);
6109         return (rc == -EINTR)? ERESTARTSYS : rc;
6110 }
6111
6112 static struct ibm_struct brightness_driver_data = {
6113         .name = "brightness",
6114         .read = brightness_read,
6115         .write = brightness_write,
6116         .exit = brightness_exit,
6117         .suspend = brightness_suspend,
6118         .shutdown = brightness_shutdown,
6119 };
6120
6121 /*************************************************************************
6122  * Volume subdriver
6123  */
6124
6125 static int volume_offset = 0x30;
6126
6127 static int volume_read(char *p)
6128 {
6129         int len = 0;
6130         u8 level;
6131
6132         if (!acpi_ec_read(volume_offset, &level)) {
6133                 len += sprintf(p + len, "level:\t\tunreadable\n");
6134         } else {
6135                 len += sprintf(p + len, "level:\t\t%d\n", level & 0xf);
6136                 len += sprintf(p + len, "mute:\t\t%s\n", onoff(level, 6));
6137                 len += sprintf(p + len, "commands:\tup, down, mute\n");
6138                 len += sprintf(p + len, "commands:\tlevel <level>"
6139                                " (<level> is 0-15)\n");
6140         }
6141
6142         return len;
6143 }
6144
6145 static int volume_write(char *buf)
6146 {
6147         int cmos_cmd, inc, i;
6148         u8 level, mute;
6149         int new_level, new_mute;
6150         char *cmd;
6151
6152         while ((cmd = next_cmd(&buf))) {
6153                 if (!acpi_ec_read(volume_offset, &level))
6154                         return -EIO;
6155                 new_mute = mute = level & 0x40;
6156                 new_level = level = level & 0xf;
6157
6158                 if (strlencmp(cmd, "up") == 0) {
6159                         if (mute)
6160                                 new_mute = 0;
6161                         else
6162                                 new_level = level == 15 ? 15 : level + 1;
6163                 } else if (strlencmp(cmd, "down") == 0) {
6164                         if (mute)
6165                                 new_mute = 0;
6166                         else
6167                                 new_level = level == 0 ? 0 : level - 1;
6168                 } else if (sscanf(cmd, "level %d", &new_level) == 1 &&
6169                            new_level >= 0 && new_level <= 15) {
6170                         /* new_level set */
6171                 } else if (strlencmp(cmd, "mute") == 0) {
6172                         new_mute = 0x40;
6173                 } else
6174                         return -EINVAL;
6175
6176                 if (new_level != level) {
6177                         /* mute doesn't change */
6178
6179                         cmos_cmd = (new_level > level) ?
6180                                         TP_CMOS_VOLUME_UP : TP_CMOS_VOLUME_DOWN;
6181                         inc = new_level > level ? 1 : -1;
6182
6183                         if (mute && (issue_thinkpad_cmos_command(cmos_cmd) ||
6184                                      !acpi_ec_write(volume_offset, level)))
6185                                 return -EIO;
6186
6187                         for (i = level; i != new_level; i += inc)
6188                                 if (issue_thinkpad_cmos_command(cmos_cmd) ||
6189                                     !acpi_ec_write(volume_offset, i + inc))
6190                                         return -EIO;
6191
6192                         if (mute &&
6193                             (issue_thinkpad_cmos_command(TP_CMOS_VOLUME_MUTE) ||
6194                              !acpi_ec_write(volume_offset, new_level + mute))) {
6195                                 return -EIO;
6196                         }
6197                 }
6198
6199                 if (new_mute != mute) {
6200                         /* level doesn't change */
6201
6202                         cmos_cmd = (new_mute) ?
6203                                    TP_CMOS_VOLUME_MUTE : TP_CMOS_VOLUME_UP;
6204
6205                         if (issue_thinkpad_cmos_command(cmos_cmd) ||
6206                             !acpi_ec_write(volume_offset, level + new_mute))
6207                                 return -EIO;
6208                 }
6209         }
6210
6211         return 0;
6212 }
6213
6214 static struct ibm_struct volume_driver_data = {
6215         .name = "volume",
6216         .read = volume_read,
6217         .write = volume_write,
6218 };
6219
6220 /*************************************************************************
6221  * Fan subdriver
6222  */
6223
6224 /*
6225  * FAN ACCESS MODES
6226  *
6227  * TPACPI_FAN_RD_ACPI_GFAN:
6228  *      ACPI GFAN method: returns fan level
6229  *
6230  *      see TPACPI_FAN_WR_ACPI_SFAN
6231  *      EC 0x2f (HFSP) not available if GFAN exists
6232  *
6233  * TPACPI_FAN_WR_ACPI_SFAN:
6234  *      ACPI SFAN method: sets fan level, 0 (stop) to 7 (max)
6235  *
6236  *      EC 0x2f (HFSP) might be available *for reading*, but do not use
6237  *      it for writing.
6238  *
6239  * TPACPI_FAN_WR_TPEC:
6240  *      ThinkPad EC register 0x2f (HFSP): fan control loop mode
6241  *      Supported on almost all ThinkPads
6242  *
6243  *      Fan speed changes of any sort (including those caused by the
6244  *      disengaged mode) are usually done slowly by the firmware as the
6245  *      maximum ammount of fan duty cycle change per second seems to be
6246  *      limited.
6247  *
6248  *      Reading is not available if GFAN exists.
6249  *      Writing is not available if