thinkpad-acpi: fix CONFIG_THINKPAD_ACPI_HOTKEY_POLL build problem
[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 0x020500
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 /* HKEY events */
149 enum tpacpi_hkey_event_t {
150         /* Hotkey-related */
151         TP_HKEY_EV_HOTKEY_BASE          = 0x1001, /* first hotkey (FN+F1) */
152         TP_HKEY_EV_BRGHT_UP             = 0x1010, /* Brightness up */
153         TP_HKEY_EV_BRGHT_DOWN           = 0x1011, /* Brightness down */
154         TP_HKEY_EV_VOL_UP               = 0x1015, /* Volume up or unmute */
155         TP_HKEY_EV_VOL_DOWN             = 0x1016, /* Volume down or unmute */
156         TP_HKEY_EV_VOL_MUTE             = 0x1017, /* Mixer output mute */
157
158         /* Reasons for waking up from S3/S4 */
159         TP_HKEY_EV_WKUP_S3_UNDOCK       = 0x2304, /* undock requested, S3 */
160         TP_HKEY_EV_WKUP_S4_UNDOCK       = 0x2404, /* undock requested, S4 */
161         TP_HKEY_EV_WKUP_S3_BAYEJ        = 0x2305, /* bay ejection req, S3 */
162         TP_HKEY_EV_WKUP_S4_BAYEJ        = 0x2405, /* bay ejection req, S4 */
163         TP_HKEY_EV_WKUP_S3_BATLOW       = 0x2313, /* battery empty, S3 */
164         TP_HKEY_EV_WKUP_S4_BATLOW       = 0x2413, /* battery empty, S4 */
165
166         /* Auto-sleep after eject request */
167         TP_HKEY_EV_BAYEJ_ACK            = 0x3003, /* bay ejection complete */
168         TP_HKEY_EV_UNDOCK_ACK           = 0x4003, /* undock complete */
169
170         /* Misc bay events */
171         TP_HKEY_EV_OPTDRV_EJ            = 0x3006, /* opt. drive tray ejected */
172
173         /* User-interface events */
174         TP_HKEY_EV_LID_CLOSE            = 0x5001, /* laptop lid closed */
175         TP_HKEY_EV_LID_OPEN             = 0x5002, /* laptop lid opened */
176         TP_HKEY_EV_TABLET_TABLET        = 0x5009, /* tablet swivel up */
177         TP_HKEY_EV_TABLET_NOTEBOOK      = 0x500a, /* tablet swivel down */
178         TP_HKEY_EV_PEN_INSERTED         = 0x500b, /* tablet pen inserted */
179         TP_HKEY_EV_PEN_REMOVED          = 0x500c, /* tablet pen removed */
180         TP_HKEY_EV_BRGHT_CHANGED        = 0x5010, /* backlight control event */
181
182         /* Thermal events */
183         TP_HKEY_EV_ALARM_BAT_HOT        = 0x6011, /* battery too hot */
184         TP_HKEY_EV_ALARM_BAT_XHOT       = 0x6012, /* battery critically hot */
185         TP_HKEY_EV_ALARM_SENSOR_HOT     = 0x6021, /* sensor too hot */
186         TP_HKEY_EV_ALARM_SENSOR_XHOT    = 0x6022, /* sensor critically hot */
187         TP_HKEY_EV_THM_TABLE_CHANGED    = 0x6030, /* thermal table changed */
188
189         /* Misc */
190         TP_HKEY_EV_RFKILL_CHANGED       = 0x7000, /* rfkill switch changed */
191 };
192
193 /****************************************************************************
194  * Main driver
195  */
196
197 #define TPACPI_NAME "thinkpad"
198 #define TPACPI_DESC "ThinkPad ACPI Extras"
199 #define TPACPI_FILE TPACPI_NAME "_acpi"
200 #define TPACPI_URL "http://ibm-acpi.sf.net/"
201 #define TPACPI_MAIL "ibm-acpi-devel@lists.sourceforge.net"
202
203 #define TPACPI_PROC_DIR "ibm"
204 #define TPACPI_ACPI_EVENT_PREFIX "ibm"
205 #define TPACPI_DRVR_NAME TPACPI_FILE
206 #define TPACPI_DRVR_SHORTNAME "tpacpi"
207 #define TPACPI_HWMON_DRVR_NAME TPACPI_NAME "_hwmon"
208
209 #define TPACPI_NVRAM_KTHREAD_NAME "ktpacpi_nvramd"
210 #define TPACPI_WORKQUEUE_NAME "ktpacpid"
211
212 #define TPACPI_MAX_ACPI_ARGS 3
213
214 /* printk headers */
215 #define TPACPI_LOG TPACPI_FILE ": "
216 #define TPACPI_EMERG    KERN_EMERG      TPACPI_LOG
217 #define TPACPI_ALERT    KERN_ALERT      TPACPI_LOG
218 #define TPACPI_CRIT     KERN_CRIT       TPACPI_LOG
219 #define TPACPI_ERR      KERN_ERR        TPACPI_LOG
220 #define TPACPI_WARN     KERN_WARNING    TPACPI_LOG
221 #define TPACPI_NOTICE   KERN_NOTICE     TPACPI_LOG
222 #define TPACPI_INFO     KERN_INFO       TPACPI_LOG
223 #define TPACPI_DEBUG    KERN_DEBUG      TPACPI_LOG
224
225 /* Debugging printk groups */
226 #define TPACPI_DBG_ALL          0xffff
227 #define TPACPI_DBG_DISCLOSETASK 0x8000
228 #define TPACPI_DBG_INIT         0x0001
229 #define TPACPI_DBG_EXIT         0x0002
230 #define TPACPI_DBG_RFKILL       0x0004
231 #define TPACPI_DBG_HKEY         0x0008
232 #define TPACPI_DBG_FAN          0x0010
233 #define TPACPI_DBG_BRGHT        0x0020
234
235 #define onoff(status, bit) ((status) & (1 << (bit)) ? "on" : "off")
236 #define enabled(status, bit) ((status) & (1 << (bit)) ? "enabled" : "disabled")
237 #define strlencmp(a, b) (strncmp((a), (b), strlen(b)))
238
239
240 /****************************************************************************
241  * Driver-wide structs and misc. variables
242  */
243
244 struct ibm_struct;
245
246 struct tp_acpi_drv_struct {
247         const struct acpi_device_id *hid;
248         struct acpi_driver *driver;
249
250         void (*notify) (struct ibm_struct *, u32);
251         acpi_handle *handle;
252         u32 type;
253         struct acpi_device *device;
254 };
255
256 struct ibm_struct {
257         char *name;
258
259         int (*read) (char *);
260         int (*write) (char *);
261         void (*exit) (void);
262         void (*resume) (void);
263         void (*suspend) (pm_message_t state);
264         void (*shutdown) (void);
265
266         struct list_head all_drivers;
267
268         struct tp_acpi_drv_struct *acpi;
269
270         struct {
271                 u8 acpi_driver_registered:1;
272                 u8 acpi_notify_installed:1;
273                 u8 proc_created:1;
274                 u8 init_called:1;
275                 u8 experimental:1;
276         } flags;
277 };
278
279 struct ibm_init_struct {
280         char param[32];
281
282         int (*init) (struct ibm_init_struct *);
283         struct ibm_struct *data;
284 };
285
286 static struct {
287         u32 bluetooth:1;
288         u32 hotkey:1;
289         u32 hotkey_mask:1;
290         u32 hotkey_wlsw:1;
291         u32 hotkey_tablet:1;
292         u32 light:1;
293         u32 light_status:1;
294         u32 bright_16levels:1;
295         u32 bright_acpimode:1;
296         u32 wan:1;
297         u32 uwb:1;
298         u32 fan_ctrl_status_undef:1;
299         u32 second_fan:1;
300         u32 beep_needs_two_args:1;
301         u32 input_device_registered:1;
302         u32 platform_drv_registered:1;
303         u32 platform_drv_attrs_registered:1;
304         u32 sensors_pdrv_registered:1;
305         u32 sensors_pdrv_attrs_registered:1;
306         u32 sensors_pdev_attrs_registered:1;
307         u32 hotkey_poll_active:1;
308 } tp_features;
309
310 static struct {
311         u16 hotkey_mask_ff:1;
312 } tp_warned;
313
314 struct thinkpad_id_data {
315         unsigned int vendor;    /* ThinkPad vendor:
316                                  * PCI_VENDOR_ID_IBM/PCI_VENDOR_ID_LENOVO */
317
318         char *bios_version_str; /* Something like 1ZET51WW (1.03z) */
319         char *ec_version_str;   /* Something like 1ZHT51WW-1.04a */
320
321         u16 bios_model;         /* 1Y = 0x5931, 0 = unknown */
322         u16 ec_model;
323         u16 bios_release;       /* 1ZETK1WW = 0x314b, 0 = unknown */
324         u16 ec_release;
325
326         char *model_str;        /* ThinkPad T43 */
327         char *nummodel_str;     /* 9384A9C for a 9384-A9C model */
328 };
329 static struct thinkpad_id_data thinkpad_id;
330
331 static enum {
332         TPACPI_LIFE_INIT = 0,
333         TPACPI_LIFE_RUNNING,
334         TPACPI_LIFE_EXITING,
335 } tpacpi_lifecycle;
336
337 static int experimental;
338 static u32 dbg_level;
339
340 static struct workqueue_struct *tpacpi_wq;
341
342 enum led_status_t {
343         TPACPI_LED_OFF = 0,
344         TPACPI_LED_ON,
345         TPACPI_LED_BLINK,
346 };
347
348 /* Special LED class that can defer work */
349 struct tpacpi_led_classdev {
350         struct led_classdev led_classdev;
351         struct work_struct work;
352         enum led_status_t new_state;
353         unsigned int led;
354 };
355
356 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
357 static int dbg_wlswemul;
358 static int tpacpi_wlsw_emulstate;
359 static int dbg_bluetoothemul;
360 static int tpacpi_bluetooth_emulstate;
361 static int dbg_wwanemul;
362 static int tpacpi_wwan_emulstate;
363 static int dbg_uwbemul;
364 static int tpacpi_uwb_emulstate;
365 #endif
366
367
368 /*************************************************************************
369  *  Debugging helpers
370  */
371
372 #define dbg_printk(a_dbg_level, format, arg...) \
373         do { if (dbg_level & (a_dbg_level)) \
374                 printk(TPACPI_DEBUG "%s: " format, __func__ , ## arg); \
375         } while (0)
376
377 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
378 #define vdbg_printk dbg_printk
379 static const char *str_supported(int is_supported);
380 #else
381 #define vdbg_printk(a_dbg_level, format, arg...) \
382         do { } while (0)
383 #endif
384
385 static void tpacpi_log_usertask(const char * const what)
386 {
387         printk(TPACPI_DEBUG "%s: access by process with PID %d\n",
388                 what, task_tgid_vnr(current));
389 }
390
391 #define tpacpi_disclose_usertask(what, format, arg...) \
392         do { \
393                 if (unlikely( \
394                     (dbg_level & TPACPI_DBG_DISCLOSETASK) && \
395                     (tpacpi_lifecycle == TPACPI_LIFE_RUNNING))) { \
396                         printk(TPACPI_DEBUG "%s: PID %d: " format, \
397                                 what, task_tgid_vnr(current), ## arg); \
398                 } \
399         } while (0)
400
401 /*
402  * Quirk handling helpers
403  *
404  * ThinkPad IDs and versions seen in the field so far
405  * are two-characters from the set [0-9A-Z], i.e. base 36.
406  *
407  * We use values well outside that range as specials.
408  */
409
410 #define TPACPI_MATCH_ANY                0xffffU
411 #define TPACPI_MATCH_UNKNOWN            0U
412
413 /* TPID('1', 'Y') == 0x5931 */
414 #define TPID(__c1, __c2) (((__c2) << 8) | (__c1))
415
416 #define TPACPI_Q_IBM(__id1, __id2, __quirk)     \
417         { .vendor = PCI_VENDOR_ID_IBM,          \
418           .bios = TPID(__id1, __id2),           \
419           .ec = TPACPI_MATCH_ANY,               \
420           .quirks = (__quirk) }
421
422 #define TPACPI_Q_LNV(__id1, __id2, __quirk)     \
423         { .vendor = PCI_VENDOR_ID_LENOVO,       \
424           .bios = TPID(__id1, __id2),           \
425           .ec = TPACPI_MATCH_ANY,               \
426           .quirks = (__quirk) }
427
428 struct tpacpi_quirk {
429         unsigned int vendor;
430         u16 bios;
431         u16 ec;
432         unsigned long quirks;
433 };
434
435 /**
436  * tpacpi_check_quirks() - search BIOS/EC version on a list
437  * @qlist:              array of &struct tpacpi_quirk
438  * @qlist_size:         number of elements in @qlist
439  *
440  * Iterates over a quirks list until one is found that matches the
441  * ThinkPad's vendor, BIOS and EC model.
442  *
443  * Returns 0 if nothing matches, otherwise returns the quirks field of
444  * the matching &struct tpacpi_quirk entry.
445  *
446  * The match criteria is: vendor, ec and bios much match.
447  */
448 static unsigned long __init tpacpi_check_quirks(
449                         const struct tpacpi_quirk *qlist,
450                         unsigned int qlist_size)
451 {
452         while (qlist_size) {
453                 if ((qlist->vendor == thinkpad_id.vendor ||
454                                 qlist->vendor == TPACPI_MATCH_ANY) &&
455                     (qlist->bios == thinkpad_id.bios_model ||
456                                 qlist->bios == TPACPI_MATCH_ANY) &&
457                     (qlist->ec == thinkpad_id.ec_model ||
458                                 qlist->ec == TPACPI_MATCH_ANY))
459                         return qlist->quirks;
460
461                 qlist_size--;
462                 qlist++;
463         }
464         return 0;
465 }
466
467
468 /****************************************************************************
469  ****************************************************************************
470  *
471  * ACPI Helpers and device model
472  *
473  ****************************************************************************
474  ****************************************************************************/
475
476 /*************************************************************************
477  * ACPI basic handles
478  */
479
480 static acpi_handle root_handle;
481
482 #define TPACPI_HANDLE(object, parent, paths...)                 \
483         static acpi_handle  object##_handle;                    \
484         static acpi_handle *object##_parent = &parent##_handle; \
485         static char        *object##_path;                      \
486         static char        *object##_paths[] = { paths }
487
488 TPACPI_HANDLE(ec, root, "\\_SB.PCI0.ISA.EC0",   /* 240, 240x */
489            "\\_SB.PCI.ISA.EC",  /* 570 */
490            "\\_SB.PCI0.ISA0.EC0",       /* 600e/x, 770e, 770x */
491            "\\_SB.PCI0.ISA.EC", /* A21e, A2xm/p, T20-22, X20-21 */
492            "\\_SB.PCI0.AD4S.EC0",       /* i1400, R30 */
493            "\\_SB.PCI0.ICH3.EC0",       /* R31 */
494            "\\_SB.PCI0.LPC.EC", /* all others */
495            );
496
497 TPACPI_HANDLE(ecrd, ec, "ECRD");        /* 570 */
498 TPACPI_HANDLE(ecwr, ec, "ECWR");        /* 570 */
499
500 TPACPI_HANDLE(cmos, root, "\\UCMS",     /* R50, R50e, R50p, R51, */
501                                         /* T4x, X31, X40 */
502            "\\CMOS",            /* A3x, G4x, R32, T23, T30, X22-24, X30 */
503            "\\CMS",             /* R40, R40e */
504            );                   /* all others */
505
506 TPACPI_HANDLE(hkey, ec, "\\_SB.HKEY",   /* 600e/x, 770e, 770x */
507            "^HKEY",             /* R30, R31 */
508            "HKEY",              /* all others */
509            );                   /* 570 */
510
511 TPACPI_HANDLE(vid, root, "\\_SB.PCI.AGP.VGA",   /* 570 */
512            "\\_SB.PCI0.AGP0.VID0",      /* 600e/x, 770x */
513            "\\_SB.PCI0.VID0",   /* 770e */
514            "\\_SB.PCI0.VID",    /* A21e, G4x, R50e, X30, X40 */
515            "\\_SB.PCI0.AGP.VID",        /* all others */
516            );                           /* R30, R31 */
517
518
519 /*************************************************************************
520  * ACPI helpers
521  */
522
523 static int acpi_evalf(acpi_handle handle,
524                       void *res, char *method, char *fmt, ...)
525 {
526         char *fmt0 = fmt;
527         struct acpi_object_list params;
528         union acpi_object in_objs[TPACPI_MAX_ACPI_ARGS];
529         struct acpi_buffer result, *resultp;
530         union acpi_object out_obj;
531         acpi_status status;
532         va_list ap;
533         char res_type;
534         int success;
535         int quiet;
536
537         if (!*fmt) {
538                 printk(TPACPI_ERR "acpi_evalf() called with empty format\n");
539                 return 0;
540         }
541
542         if (*fmt == 'q') {
543                 quiet = 1;
544                 fmt++;
545         } else
546                 quiet = 0;
547
548         res_type = *(fmt++);
549
550         params.count = 0;
551         params.pointer = &in_objs[0];
552
553         va_start(ap, fmt);
554         while (*fmt) {
555                 char c = *(fmt++);
556                 switch (c) {
557                 case 'd':       /* int */
558                         in_objs[params.count].integer.value = va_arg(ap, int);
559                         in_objs[params.count++].type = ACPI_TYPE_INTEGER;
560                         break;
561                         /* add more types as needed */
562                 default:
563                         printk(TPACPI_ERR "acpi_evalf() called "
564                                "with invalid format character '%c'\n", c);
565                         return 0;
566                 }
567         }
568         va_end(ap);
569
570         if (res_type != 'v') {
571                 result.length = sizeof(out_obj);
572                 result.pointer = &out_obj;
573                 resultp = &result;
574         } else
575                 resultp = NULL;
576
577         status = acpi_evaluate_object(handle, method, &params, resultp);
578
579         switch (res_type) {
580         case 'd':               /* int */
581                 if (res)
582                         *(int *)res = out_obj.integer.value;
583                 success = status == AE_OK && out_obj.type == ACPI_TYPE_INTEGER;
584                 break;
585         case 'v':               /* void */
586                 success = status == AE_OK;
587                 break;
588                 /* add more types as needed */
589         default:
590                 printk(TPACPI_ERR "acpi_evalf() called "
591                        "with invalid format character '%c'\n", res_type);
592                 return 0;
593         }
594
595         if (!success && !quiet)
596                 printk(TPACPI_ERR "acpi_evalf(%s, %s, ...) failed: %d\n",
597                        method, fmt0, status);
598
599         return success;
600 }
601
602 static int acpi_ec_read(int i, u8 *p)
603 {
604         int v;
605
606         if (ecrd_handle) {
607                 if (!acpi_evalf(ecrd_handle, &v, NULL, "dd", i))
608                         return 0;
609                 *p = v;
610         } else {
611                 if (ec_read(i, p) < 0)
612                         return 0;
613         }
614
615         return 1;
616 }
617
618 static int acpi_ec_write(int i, u8 v)
619 {
620         if (ecwr_handle) {
621                 if (!acpi_evalf(ecwr_handle, NULL, NULL, "vdd", i, v))
622                         return 0;
623         } else {
624                 if (ec_write(i, v) < 0)
625                         return 0;
626         }
627
628         return 1;
629 }
630
631 static int issue_thinkpad_cmos_command(int cmos_cmd)
632 {
633         if (!cmos_handle)
634                 return -ENXIO;
635
636         if (!acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd))
637                 return -EIO;
638
639         return 0;
640 }
641
642 /*************************************************************************
643  * ACPI device model
644  */
645
646 #define TPACPI_ACPIHANDLE_INIT(object) \
647         drv_acpi_handle_init(#object, &object##_handle, *object##_parent, \
648                 object##_paths, ARRAY_SIZE(object##_paths), &object##_path)
649
650 static void drv_acpi_handle_init(char *name,
651                            acpi_handle *handle, acpi_handle parent,
652                            char **paths, int num_paths, char **path)
653 {
654         int i;
655         acpi_status status;
656
657         vdbg_printk(TPACPI_DBG_INIT, "trying to locate ACPI handle for %s\n",
658                 name);
659
660         for (i = 0; i < num_paths; i++) {
661                 status = acpi_get_handle(parent, paths[i], handle);
662                 if (ACPI_SUCCESS(status)) {
663                         *path = paths[i];
664                         dbg_printk(TPACPI_DBG_INIT,
665                                    "Found ACPI handle %s for %s\n",
666                                    *path, name);
667                         return;
668                 }
669         }
670
671         vdbg_printk(TPACPI_DBG_INIT, "ACPI handle for %s not found\n",
672                     name);
673         *handle = NULL;
674 }
675
676 static void dispatch_acpi_notify(acpi_handle handle, u32 event, void *data)
677 {
678         struct ibm_struct *ibm = data;
679
680         if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
681                 return;
682
683         if (!ibm || !ibm->acpi || !ibm->acpi->notify)
684                 return;
685
686         ibm->acpi->notify(ibm, event);
687 }
688
689 static int __init setup_acpi_notify(struct ibm_struct *ibm)
690 {
691         acpi_status status;
692         int rc;
693
694         BUG_ON(!ibm->acpi);
695
696         if (!*ibm->acpi->handle)
697                 return 0;
698
699         vdbg_printk(TPACPI_DBG_INIT,
700                 "setting up ACPI notify for %s\n", ibm->name);
701
702         rc = acpi_bus_get_device(*ibm->acpi->handle, &ibm->acpi->device);
703         if (rc < 0) {
704                 printk(TPACPI_ERR "acpi_bus_get_device(%s) failed: %d\n",
705                         ibm->name, rc);
706                 return -ENODEV;
707         }
708
709         ibm->acpi->device->driver_data = ibm;
710         sprintf(acpi_device_class(ibm->acpi->device), "%s/%s",
711                 TPACPI_ACPI_EVENT_PREFIX,
712                 ibm->name);
713
714         status = acpi_install_notify_handler(*ibm->acpi->handle,
715                         ibm->acpi->type, dispatch_acpi_notify, ibm);
716         if (ACPI_FAILURE(status)) {
717                 if (status == AE_ALREADY_EXISTS) {
718                         printk(TPACPI_NOTICE
719                                "another device driver is already "
720                                "handling %s events\n", ibm->name);
721                 } else {
722                         printk(TPACPI_ERR
723                                "acpi_install_notify_handler(%s) failed: %d\n",
724                                ibm->name, status);
725                 }
726                 return -ENODEV;
727         }
728         ibm->flags.acpi_notify_installed = 1;
729         return 0;
730 }
731
732 static int __init tpacpi_device_add(struct acpi_device *device)
733 {
734         return 0;
735 }
736
737 static int __init register_tpacpi_subdriver(struct ibm_struct *ibm)
738 {
739         int rc;
740
741         dbg_printk(TPACPI_DBG_INIT,
742                 "registering %s as an ACPI driver\n", ibm->name);
743
744         BUG_ON(!ibm->acpi);
745
746         ibm->acpi->driver = kzalloc(sizeof(struct acpi_driver), GFP_KERNEL);
747         if (!ibm->acpi->driver) {
748                 printk(TPACPI_ERR
749                        "failed to allocate memory for ibm->acpi->driver\n");
750                 return -ENOMEM;
751         }
752
753         sprintf(ibm->acpi->driver->name, "%s_%s", TPACPI_NAME, ibm->name);
754         ibm->acpi->driver->ids = ibm->acpi->hid;
755
756         ibm->acpi->driver->ops.add = &tpacpi_device_add;
757
758         rc = acpi_bus_register_driver(ibm->acpi->driver);
759         if (rc < 0) {
760                 printk(TPACPI_ERR "acpi_bus_register_driver(%s) failed: %d\n",
761                        ibm->name, rc);
762                 kfree(ibm->acpi->driver);
763                 ibm->acpi->driver = NULL;
764         } else if (!rc)
765                 ibm->flags.acpi_driver_registered = 1;
766
767         return rc;
768 }
769
770
771 /****************************************************************************
772  ****************************************************************************
773  *
774  * Procfs Helpers
775  *
776  ****************************************************************************
777  ****************************************************************************/
778
779 static int dispatch_procfs_read(char *page, char **start, off_t off,
780                         int count, int *eof, void *data)
781 {
782         struct ibm_struct *ibm = data;
783         int len;
784
785         if (!ibm || !ibm->read)
786                 return -EINVAL;
787
788         len = ibm->read(page);
789         if (len < 0)
790                 return len;
791
792         if (len <= off + count)
793                 *eof = 1;
794         *start = page + off;
795         len -= off;
796         if (len > count)
797                 len = count;
798         if (len < 0)
799                 len = 0;
800
801         return len;
802 }
803
804 static int dispatch_procfs_write(struct file *file,
805                         const char __user *userbuf,
806                         unsigned long count, void *data)
807 {
808         struct ibm_struct *ibm = data;
809         char *kernbuf;
810         int ret;
811
812         if (!ibm || !ibm->write)
813                 return -EINVAL;
814         if (count > PAGE_SIZE - 2)
815                 return -EINVAL;
816
817         kernbuf = kmalloc(count + 2, GFP_KERNEL);
818         if (!kernbuf)
819                 return -ENOMEM;
820
821         if (copy_from_user(kernbuf, userbuf, count)) {
822                 kfree(kernbuf);
823                 return -EFAULT;
824         }
825
826         kernbuf[count] = 0;
827         strcat(kernbuf, ",");
828         ret = ibm->write(kernbuf);
829         if (ret == 0)
830                 ret = count;
831
832         kfree(kernbuf);
833
834         return ret;
835 }
836
837 static char *next_cmd(char **cmds)
838 {
839         char *start = *cmds;
840         char *end;
841
842         while ((end = strchr(start, ',')) && end == start)
843                 start = end + 1;
844
845         if (!end)
846                 return NULL;
847
848         *end = 0;
849         *cmds = end + 1;
850         return start;
851 }
852
853
854 /****************************************************************************
855  ****************************************************************************
856  *
857  * Device model: input, hwmon and platform
858  *
859  ****************************************************************************
860  ****************************************************************************/
861
862 static struct platform_device *tpacpi_pdev;
863 static struct platform_device *tpacpi_sensors_pdev;
864 static struct device *tpacpi_hwmon;
865 static struct input_dev *tpacpi_inputdev;
866 static struct mutex tpacpi_inputdev_send_mutex;
867 static LIST_HEAD(tpacpi_all_drivers);
868
869 static int tpacpi_suspend_handler(struct platform_device *pdev,
870                                   pm_message_t state)
871 {
872         struct ibm_struct *ibm, *itmp;
873
874         list_for_each_entry_safe(ibm, itmp,
875                                  &tpacpi_all_drivers,
876                                  all_drivers) {
877                 if (ibm->suspend)
878                         (ibm->suspend)(state);
879         }
880
881         return 0;
882 }
883
884 static int tpacpi_resume_handler(struct platform_device *pdev)
885 {
886         struct ibm_struct *ibm, *itmp;
887
888         list_for_each_entry_safe(ibm, itmp,
889                                  &tpacpi_all_drivers,
890                                  all_drivers) {
891                 if (ibm->resume)
892                         (ibm->resume)();
893         }
894
895         return 0;
896 }
897
898 static void tpacpi_shutdown_handler(struct platform_device *pdev)
899 {
900         struct ibm_struct *ibm, *itmp;
901
902         list_for_each_entry_safe(ibm, itmp,
903                                  &tpacpi_all_drivers,
904                                  all_drivers) {
905                 if (ibm->shutdown)
906                         (ibm->shutdown)();
907         }
908 }
909
910 static struct platform_driver tpacpi_pdriver = {
911         .driver = {
912                 .name = TPACPI_DRVR_NAME,
913                 .owner = THIS_MODULE,
914         },
915         .suspend = tpacpi_suspend_handler,
916         .resume = tpacpi_resume_handler,
917         .shutdown = tpacpi_shutdown_handler,
918 };
919
920 static struct platform_driver tpacpi_hwmon_pdriver = {
921         .driver = {
922                 .name = TPACPI_HWMON_DRVR_NAME,
923                 .owner = THIS_MODULE,
924         },
925 };
926
927 /*************************************************************************
928  * sysfs support helpers
929  */
930
931 struct attribute_set {
932         unsigned int members, max_members;
933         struct attribute_group group;
934 };
935
936 struct attribute_set_obj {
937         struct attribute_set s;
938         struct attribute *a;
939 } __attribute__((packed));
940
941 static struct attribute_set *create_attr_set(unsigned int max_members,
942                                                 const char *name)
943 {
944         struct attribute_set_obj *sobj;
945
946         if (max_members == 0)
947                 return NULL;
948
949         /* Allocates space for implicit NULL at the end too */
950         sobj = kzalloc(sizeof(struct attribute_set_obj) +
951                     max_members * sizeof(struct attribute *),
952                     GFP_KERNEL);
953         if (!sobj)
954                 return NULL;
955         sobj->s.max_members = max_members;
956         sobj->s.group.attrs = &sobj->a;
957         sobj->s.group.name = name;
958
959         return &sobj->s;
960 }
961
962 #define destroy_attr_set(_set) \
963         kfree(_set);
964
965 /* not multi-threaded safe, use it in a single thread per set */
966 static int add_to_attr_set(struct attribute_set *s, struct attribute *attr)
967 {
968         if (!s || !attr)
969                 return -EINVAL;
970
971         if (s->members >= s->max_members)
972                 return -ENOMEM;
973
974         s->group.attrs[s->members] = attr;
975         s->members++;
976
977         return 0;
978 }
979
980 static int add_many_to_attr_set(struct attribute_set *s,
981                         struct attribute **attr,
982                         unsigned int count)
983 {
984         int i, res;
985
986         for (i = 0; i < count; i++) {
987                 res = add_to_attr_set(s, attr[i]);
988                 if (res)
989                         return res;
990         }
991
992         return 0;
993 }
994
995 static void delete_attr_set(struct attribute_set *s, struct kobject *kobj)
996 {
997         sysfs_remove_group(kobj, &s->group);
998         destroy_attr_set(s);
999 }
1000
1001 #define register_attr_set_with_sysfs(_attr_set, _kobj) \
1002         sysfs_create_group(_kobj, &_attr_set->group)
1003
1004 static int parse_strtoul(const char *buf,
1005                 unsigned long max, unsigned long *value)
1006 {
1007         char *endp;
1008
1009         while (*buf && isspace(*buf))
1010                 buf++;
1011         *value = simple_strtoul(buf, &endp, 0);
1012         while (*endp && isspace(*endp))
1013                 endp++;
1014         if (*endp || *value > max)
1015                 return -EINVAL;
1016
1017         return 0;
1018 }
1019
1020 static void tpacpi_disable_brightness_delay(void)
1021 {
1022         if (acpi_evalf(hkey_handle, NULL, "PWMS", "qvd", 0))
1023                 printk(TPACPI_NOTICE
1024                         "ACPI backlight control delay disabled\n");
1025 }
1026
1027 static int __init tpacpi_query_bcl_levels(acpi_handle handle)
1028 {
1029         struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
1030         union acpi_object *obj;
1031         int rc;
1032
1033         if (ACPI_SUCCESS(acpi_evaluate_object(handle, NULL, NULL, &buffer))) {
1034                 obj = (union acpi_object *)buffer.pointer;
1035                 if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) {
1036                         printk(TPACPI_ERR "Unknown _BCL data, "
1037                                "please report this to %s\n", TPACPI_MAIL);
1038                         rc = 0;
1039                 } else {
1040                         rc = obj->package.count;
1041                 }
1042         } else {
1043                 return 0;
1044         }
1045
1046         kfree(buffer.pointer);
1047         return rc;
1048 }
1049
1050 static acpi_status __init tpacpi_acpi_walk_find_bcl(acpi_handle handle,
1051                                         u32 lvl, void *context, void **rv)
1052 {
1053         char name[ACPI_PATH_SEGMENT_LENGTH];
1054         struct acpi_buffer buffer = { sizeof(name), &name };
1055
1056         if (ACPI_SUCCESS(acpi_get_name(handle, ACPI_SINGLE_NAME, &buffer)) &&
1057             !strncmp("_BCL", name, sizeof(name) - 1)) {
1058                 BUG_ON(!rv || !*rv);
1059                 **(int **)rv = tpacpi_query_bcl_levels(handle);
1060                 return AE_CTRL_TERMINATE;
1061         } else {
1062                 return AE_OK;
1063         }
1064 }
1065
1066 /*
1067  * Returns 0 (no ACPI _BCL or _BCL invalid), or size of brightness map
1068  */
1069 static int __init tpacpi_check_std_acpi_brightness_support(void)
1070 {
1071         int status;
1072         int bcl_levels = 0;
1073         void *bcl_ptr = &bcl_levels;
1074
1075         if (!vid_handle) {
1076                 TPACPI_ACPIHANDLE_INIT(vid);
1077         }
1078         if (!vid_handle)
1079                 return 0;
1080
1081         /*
1082          * Search for a _BCL method, and execute it.  This is safe on all
1083          * ThinkPads, and as a side-effect, _BCL will place a Lenovo Vista
1084          * BIOS in ACPI backlight control mode.  We do NOT have to care
1085          * about calling the _BCL method in an enabled video device, any
1086          * will do for our purposes.
1087          */
1088
1089         status = acpi_walk_namespace(ACPI_TYPE_METHOD, vid_handle, 3,
1090                                      tpacpi_acpi_walk_find_bcl, NULL,
1091                                      &bcl_ptr);
1092
1093         if (ACPI_SUCCESS(status) && bcl_levels > 2) {
1094                 tp_features.bright_acpimode = 1;
1095                 return (bcl_levels - 2);
1096         }
1097
1098         return 0;
1099 }
1100
1101 static void printk_deprecated_attribute(const char * const what,
1102                                         const char * const details)
1103 {
1104         tpacpi_log_usertask("deprecated sysfs attribute");
1105         printk(TPACPI_WARN "WARNING: sysfs attribute %s is deprecated and "
1106                 "will be removed. %s\n",
1107                 what, details);
1108 }
1109
1110 /*************************************************************************
1111  * rfkill and radio control support helpers
1112  */
1113
1114 /*
1115  * ThinkPad-ACPI firmware handling model:
1116  *
1117  * WLSW (master wireless switch) is event-driven, and is common to all
1118  * firmware-controlled radios.  It cannot be controlled, just monitored,
1119  * as expected.  It overrides all radio state in firmware
1120  *
1121  * The kernel, a masked-off hotkey, and WLSW can change the radio state
1122  * (TODO: verify how WLSW interacts with the returned radio state).
1123  *
1124  * The only time there are shadow radio state changes, is when
1125  * masked-off hotkeys are used.
1126  */
1127
1128 /*
1129  * Internal driver API for radio state:
1130  *
1131  * int: < 0 = error, otherwise enum tpacpi_rfkill_state
1132  * bool: true means radio blocked (off)
1133  */
1134 enum tpacpi_rfkill_state {
1135         TPACPI_RFK_RADIO_OFF = 0,
1136         TPACPI_RFK_RADIO_ON
1137 };
1138
1139 /* rfkill switches */
1140 enum tpacpi_rfk_id {
1141         TPACPI_RFK_BLUETOOTH_SW_ID = 0,
1142         TPACPI_RFK_WWAN_SW_ID,
1143         TPACPI_RFK_UWB_SW_ID,
1144         TPACPI_RFK_SW_MAX
1145 };
1146
1147 static const char *tpacpi_rfkill_names[] = {
1148         [TPACPI_RFK_BLUETOOTH_SW_ID] = "bluetooth",
1149         [TPACPI_RFK_WWAN_SW_ID] = "wwan",
1150         [TPACPI_RFK_UWB_SW_ID] = "uwb",
1151         [TPACPI_RFK_SW_MAX] = NULL
1152 };
1153
1154 /* ThinkPad-ACPI rfkill subdriver */
1155 struct tpacpi_rfk {
1156         struct rfkill *rfkill;
1157         enum tpacpi_rfk_id id;
1158         const struct tpacpi_rfk_ops *ops;
1159 };
1160
1161 struct tpacpi_rfk_ops {
1162         /* firmware interface */
1163         int (*get_status)(void);
1164         int (*set_status)(const enum tpacpi_rfkill_state);
1165 };
1166
1167 static struct tpacpi_rfk *tpacpi_rfkill_switches[TPACPI_RFK_SW_MAX];
1168
1169 /* Query FW and update rfkill sw state for a given rfkill switch */
1170 static int tpacpi_rfk_update_swstate(const struct tpacpi_rfk *tp_rfk)
1171 {
1172         int status;
1173
1174         if (!tp_rfk)
1175                 return -ENODEV;
1176
1177         status = (tp_rfk->ops->get_status)();
1178         if (status < 0)
1179                 return status;
1180
1181         rfkill_set_sw_state(tp_rfk->rfkill,
1182                             (status == TPACPI_RFK_RADIO_OFF));
1183
1184         return status;
1185 }
1186
1187 /* Query FW and update rfkill sw state for all rfkill switches */
1188 static void tpacpi_rfk_update_swstate_all(void)
1189 {
1190         unsigned int i;
1191
1192         for (i = 0; i < TPACPI_RFK_SW_MAX; i++)
1193                 tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[i]);
1194 }
1195
1196 /*
1197  * Sync the HW-blocking state of all rfkill switches,
1198  * do notice it causes the rfkill core to schedule uevents
1199  */
1200 static void tpacpi_rfk_update_hwblock_state(bool blocked)
1201 {
1202         unsigned int i;
1203         struct tpacpi_rfk *tp_rfk;
1204
1205         for (i = 0; i < TPACPI_RFK_SW_MAX; i++) {
1206                 tp_rfk = tpacpi_rfkill_switches[i];
1207                 if (tp_rfk) {
1208                         if (rfkill_set_hw_state(tp_rfk->rfkill,
1209                                                 blocked)) {
1210                                 /* ignore -- we track sw block */
1211                         }
1212                 }
1213         }
1214 }
1215
1216 /* Call to get the WLSW state from the firmware */
1217 static int hotkey_get_wlsw(void);
1218
1219 /* Call to query WLSW state and update all rfkill switches */
1220 static bool tpacpi_rfk_check_hwblock_state(void)
1221 {
1222         int res = hotkey_get_wlsw();
1223         int hw_blocked;
1224
1225         /* When unknown or unsupported, we have to assume it is unblocked */
1226         if (res < 0)
1227                 return false;
1228
1229         hw_blocked = (res == TPACPI_RFK_RADIO_OFF);
1230         tpacpi_rfk_update_hwblock_state(hw_blocked);
1231
1232         return hw_blocked;
1233 }
1234
1235 static int tpacpi_rfk_hook_set_block(void *data, bool blocked)
1236 {
1237         struct tpacpi_rfk *tp_rfk = data;
1238         int res;
1239
1240         dbg_printk(TPACPI_DBG_RFKILL,
1241                    "request to change radio state to %s\n",
1242                    blocked ? "blocked" : "unblocked");
1243
1244         /* try to set radio state */
1245         res = (tp_rfk->ops->set_status)(blocked ?
1246                                 TPACPI_RFK_RADIO_OFF : TPACPI_RFK_RADIO_ON);
1247
1248         /* and update the rfkill core with whatever the FW really did */
1249         tpacpi_rfk_update_swstate(tp_rfk);
1250
1251         return (res < 0) ? res : 0;
1252 }
1253
1254 static const struct rfkill_ops tpacpi_rfk_rfkill_ops = {
1255         .set_block = tpacpi_rfk_hook_set_block,
1256 };
1257
1258 static int __init tpacpi_new_rfkill(const enum tpacpi_rfk_id id,
1259                         const struct tpacpi_rfk_ops *tp_rfkops,
1260                         const enum rfkill_type rfktype,
1261                         const char *name,
1262                         const bool set_default)
1263 {
1264         struct tpacpi_rfk *atp_rfk;
1265         int res;
1266         bool sw_state = false;
1267         int sw_status;
1268
1269         BUG_ON(id >= TPACPI_RFK_SW_MAX || tpacpi_rfkill_switches[id]);
1270
1271         atp_rfk = kzalloc(sizeof(struct tpacpi_rfk), GFP_KERNEL);
1272         if (atp_rfk)
1273                 atp_rfk->rfkill = rfkill_alloc(name,
1274                                                 &tpacpi_pdev->dev,
1275                                                 rfktype,
1276                                                 &tpacpi_rfk_rfkill_ops,
1277                                                 atp_rfk);
1278         if (!atp_rfk || !atp_rfk->rfkill) {
1279                 printk(TPACPI_ERR
1280                         "failed to allocate memory for rfkill class\n");
1281                 kfree(atp_rfk);
1282                 return -ENOMEM;
1283         }
1284
1285         atp_rfk->id = id;
1286         atp_rfk->ops = tp_rfkops;
1287
1288         sw_status = (tp_rfkops->get_status)();
1289         if (sw_status < 0) {
1290                 printk(TPACPI_ERR
1291                         "failed to read initial state for %s, error %d\n",
1292                         name, sw_status);
1293         } else {
1294                 sw_state = (sw_status == TPACPI_RFK_RADIO_OFF);
1295                 if (set_default) {
1296                         /* try to keep the initial state, since we ask the
1297                          * firmware to preserve it across S5 in NVRAM */
1298                         rfkill_init_sw_state(atp_rfk->rfkill, sw_state);
1299                 }
1300         }
1301         rfkill_set_hw_state(atp_rfk->rfkill, tpacpi_rfk_check_hwblock_state());
1302
1303         res = rfkill_register(atp_rfk->rfkill);
1304         if (res < 0) {
1305                 printk(TPACPI_ERR
1306                         "failed to register %s rfkill switch: %d\n",
1307                         name, res);
1308                 rfkill_destroy(atp_rfk->rfkill);
1309                 kfree(atp_rfk);
1310                 return res;
1311         }
1312
1313         tpacpi_rfkill_switches[id] = atp_rfk;
1314         return 0;
1315 }
1316
1317 static void tpacpi_destroy_rfkill(const enum tpacpi_rfk_id id)
1318 {
1319         struct tpacpi_rfk *tp_rfk;
1320
1321         BUG_ON(id >= TPACPI_RFK_SW_MAX);
1322
1323         tp_rfk = tpacpi_rfkill_switches[id];
1324         if (tp_rfk) {
1325                 rfkill_unregister(tp_rfk->rfkill);
1326                 rfkill_destroy(tp_rfk->rfkill);
1327                 tpacpi_rfkill_switches[id] = NULL;
1328                 kfree(tp_rfk);
1329         }
1330 }
1331
1332 static void printk_deprecated_rfkill_attribute(const char * const what)
1333 {
1334         printk_deprecated_attribute(what,
1335                         "Please switch to generic rfkill before year 2010");
1336 }
1337
1338 /* sysfs <radio> enable ------------------------------------------------ */
1339 static ssize_t tpacpi_rfk_sysfs_enable_show(const enum tpacpi_rfk_id id,
1340                                             struct device_attribute *attr,
1341                                             char *buf)
1342 {
1343         int status;
1344
1345         printk_deprecated_rfkill_attribute(attr->attr.name);
1346
1347         /* This is in the ABI... */
1348         if (tpacpi_rfk_check_hwblock_state()) {
1349                 status = TPACPI_RFK_RADIO_OFF;
1350         } else {
1351                 status = tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]);
1352                 if (status < 0)
1353                         return status;
1354         }
1355
1356         return snprintf(buf, PAGE_SIZE, "%d\n",
1357                         (status == TPACPI_RFK_RADIO_ON) ? 1 : 0);
1358 }
1359
1360 static ssize_t tpacpi_rfk_sysfs_enable_store(const enum tpacpi_rfk_id id,
1361                             struct device_attribute *attr,
1362                             const char *buf, size_t count)
1363 {
1364         unsigned long t;
1365         int res;
1366
1367         printk_deprecated_rfkill_attribute(attr->attr.name);
1368
1369         if (parse_strtoul(buf, 1, &t))
1370                 return -EINVAL;
1371
1372         tpacpi_disclose_usertask(attr->attr.name, "set to %ld\n", t);
1373
1374         /* This is in the ABI... */
1375         if (tpacpi_rfk_check_hwblock_state() && !!t)
1376                 return -EPERM;
1377
1378         res = tpacpi_rfkill_switches[id]->ops->set_status((!!t) ?
1379                                 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF);
1380         tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]);
1381
1382         return (res < 0) ? res : count;
1383 }
1384
1385 /* procfs -------------------------------------------------------------- */
1386 static int tpacpi_rfk_procfs_read(const enum tpacpi_rfk_id id, char *p)
1387 {
1388         int len = 0;
1389
1390         if (id >= TPACPI_RFK_SW_MAX)
1391                 len += sprintf(p + len, "status:\t\tnot supported\n");
1392         else {
1393                 int status;
1394
1395                 /* This is in the ABI... */
1396                 if (tpacpi_rfk_check_hwblock_state()) {
1397                         status = TPACPI_RFK_RADIO_OFF;
1398                 } else {
1399                         status = tpacpi_rfk_update_swstate(
1400                                                 tpacpi_rfkill_switches[id]);
1401                         if (status < 0)
1402                                 return status;
1403                 }
1404
1405                 len += sprintf(p + len, "status:\t\t%s\n",
1406                                 (status == TPACPI_RFK_RADIO_ON) ?
1407                                         "enabled" : "disabled");
1408                 len += sprintf(p + len, "commands:\tenable, disable\n");
1409         }
1410
1411         return len;
1412 }
1413
1414 static int tpacpi_rfk_procfs_write(const enum tpacpi_rfk_id id, char *buf)
1415 {
1416         char *cmd;
1417         int status = -1;
1418         int res = 0;
1419
1420         if (id >= TPACPI_RFK_SW_MAX)
1421                 return -ENODEV;
1422
1423         while ((cmd = next_cmd(&buf))) {
1424                 if (strlencmp(cmd, "enable") == 0)
1425                         status = TPACPI_RFK_RADIO_ON;
1426                 else if (strlencmp(cmd, "disable") == 0)
1427                         status = TPACPI_RFK_RADIO_OFF;
1428                 else
1429                         return -EINVAL;
1430         }
1431
1432         if (status != -1) {
1433                 tpacpi_disclose_usertask("procfs", "attempt to %s %s\n",
1434                                 (status == TPACPI_RFK_RADIO_ON) ?
1435                                                 "enable" : "disable",
1436                                 tpacpi_rfkill_names[id]);
1437                 res = (tpacpi_rfkill_switches[id]->ops->set_status)(status);
1438                 tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]);
1439         }
1440
1441         return res;
1442 }
1443
1444 /*************************************************************************
1445  * thinkpad-acpi driver attributes
1446  */
1447
1448 /* interface_version --------------------------------------------------- */
1449 static ssize_t tpacpi_driver_interface_version_show(
1450                                 struct device_driver *drv,
1451                                 char *buf)
1452 {
1453         return snprintf(buf, PAGE_SIZE, "0x%08x\n", TPACPI_SYSFS_VERSION);
1454 }
1455
1456 static DRIVER_ATTR(interface_version, S_IRUGO,
1457                 tpacpi_driver_interface_version_show, NULL);
1458
1459 /* debug_level --------------------------------------------------------- */
1460 static ssize_t tpacpi_driver_debug_show(struct device_driver *drv,
1461                                                 char *buf)
1462 {
1463         return snprintf(buf, PAGE_SIZE, "0x%04x\n", dbg_level);
1464 }
1465
1466 static ssize_t tpacpi_driver_debug_store(struct device_driver *drv,
1467                                                 const char *buf, size_t count)
1468 {
1469         unsigned long t;
1470
1471         if (parse_strtoul(buf, 0xffff, &t))
1472                 return -EINVAL;
1473
1474         dbg_level = t;
1475
1476         return count;
1477 }
1478
1479 static DRIVER_ATTR(debug_level, S_IWUSR | S_IRUGO,
1480                 tpacpi_driver_debug_show, tpacpi_driver_debug_store);
1481
1482 /* version ------------------------------------------------------------- */
1483 static ssize_t tpacpi_driver_version_show(struct device_driver *drv,
1484                                                 char *buf)
1485 {
1486         return snprintf(buf, PAGE_SIZE, "%s v%s\n",
1487                         TPACPI_DESC, TPACPI_VERSION);
1488 }
1489
1490 static DRIVER_ATTR(version, S_IRUGO,
1491                 tpacpi_driver_version_show, NULL);
1492
1493 /* --------------------------------------------------------------------- */
1494
1495 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
1496
1497 /* wlsw_emulstate ------------------------------------------------------ */
1498 static ssize_t tpacpi_driver_wlsw_emulstate_show(struct device_driver *drv,
1499                                                 char *buf)
1500 {
1501         return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_wlsw_emulstate);
1502 }
1503
1504 static ssize_t tpacpi_driver_wlsw_emulstate_store(struct device_driver *drv,
1505                                                 const char *buf, size_t count)
1506 {
1507         unsigned long t;
1508
1509         if (parse_strtoul(buf, 1, &t))
1510                 return -EINVAL;
1511
1512         if (tpacpi_wlsw_emulstate != !!t) {
1513                 tpacpi_wlsw_emulstate = !!t;
1514                 tpacpi_rfk_update_hwblock_state(!t);    /* negative logic */
1515         }
1516
1517         return count;
1518 }
1519
1520 static DRIVER_ATTR(wlsw_emulstate, S_IWUSR | S_IRUGO,
1521                 tpacpi_driver_wlsw_emulstate_show,
1522                 tpacpi_driver_wlsw_emulstate_store);
1523
1524 /* bluetooth_emulstate ------------------------------------------------- */
1525 static ssize_t tpacpi_driver_bluetooth_emulstate_show(
1526                                         struct device_driver *drv,
1527                                         char *buf)
1528 {
1529         return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_bluetooth_emulstate);
1530 }
1531
1532 static ssize_t tpacpi_driver_bluetooth_emulstate_store(
1533                                         struct device_driver *drv,
1534                                         const char *buf, size_t count)
1535 {
1536         unsigned long t;
1537
1538         if (parse_strtoul(buf, 1, &t))
1539                 return -EINVAL;
1540
1541         tpacpi_bluetooth_emulstate = !!t;
1542
1543         return count;
1544 }
1545
1546 static DRIVER_ATTR(bluetooth_emulstate, S_IWUSR | S_IRUGO,
1547                 tpacpi_driver_bluetooth_emulstate_show,
1548                 tpacpi_driver_bluetooth_emulstate_store);
1549
1550 /* wwan_emulstate ------------------------------------------------- */
1551 static ssize_t tpacpi_driver_wwan_emulstate_show(
1552                                         struct device_driver *drv,
1553                                         char *buf)
1554 {
1555         return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_wwan_emulstate);
1556 }
1557
1558 static ssize_t tpacpi_driver_wwan_emulstate_store(
1559                                         struct device_driver *drv,
1560                                         const char *buf, size_t count)
1561 {
1562         unsigned long t;
1563
1564         if (parse_strtoul(buf, 1, &t))
1565                 return -EINVAL;
1566
1567         tpacpi_wwan_emulstate = !!t;
1568
1569         return count;
1570 }
1571
1572 static DRIVER_ATTR(wwan_emulstate, S_IWUSR | S_IRUGO,
1573                 tpacpi_driver_wwan_emulstate_show,
1574                 tpacpi_driver_wwan_emulstate_store);
1575
1576 /* uwb_emulstate ------------------------------------------------- */
1577 static ssize_t tpacpi_driver_uwb_emulstate_show(
1578                                         struct device_driver *drv,
1579                                         char *buf)
1580 {
1581         return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_uwb_emulstate);
1582 }
1583
1584 static ssize_t tpacpi_driver_uwb_emulstate_store(
1585                                         struct device_driver *drv,
1586                                         const char *buf, size_t count)
1587 {
1588         unsigned long t;
1589
1590         if (parse_strtoul(buf, 1, &t))
1591                 return -EINVAL;
1592
1593         tpacpi_uwb_emulstate = !!t;
1594
1595         return count;
1596 }
1597
1598 static DRIVER_ATTR(uwb_emulstate, S_IWUSR | S_IRUGO,
1599                 tpacpi_driver_uwb_emulstate_show,
1600                 tpacpi_driver_uwb_emulstate_store);
1601 #endif
1602
1603 /* --------------------------------------------------------------------- */
1604
1605 static struct driver_attribute *tpacpi_driver_attributes[] = {
1606         &driver_attr_debug_level, &driver_attr_version,
1607         &driver_attr_interface_version,
1608 };
1609
1610 static int __init tpacpi_create_driver_attributes(struct device_driver *drv)
1611 {
1612         int i, res;
1613
1614         i = 0;
1615         res = 0;
1616         while (!res && i < ARRAY_SIZE(tpacpi_driver_attributes)) {
1617                 res = driver_create_file(drv, tpacpi_driver_attributes[i]);
1618                 i++;
1619         }
1620
1621 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
1622         if (!res && dbg_wlswemul)
1623                 res = driver_create_file(drv, &driver_attr_wlsw_emulstate);
1624         if (!res && dbg_bluetoothemul)
1625                 res = driver_create_file(drv, &driver_attr_bluetooth_emulstate);
1626         if (!res && dbg_wwanemul)
1627                 res = driver_create_file(drv, &driver_attr_wwan_emulstate);
1628         if (!res && dbg_uwbemul)
1629                 res = driver_create_file(drv, &driver_attr_uwb_emulstate);
1630 #endif
1631
1632         return res;
1633 }
1634
1635 static void tpacpi_remove_driver_attributes(struct device_driver *drv)
1636 {
1637         int i;
1638
1639         for (i = 0; i < ARRAY_SIZE(tpacpi_driver_attributes); i++)
1640                 driver_remove_file(drv, tpacpi_driver_attributes[i]);
1641
1642 #ifdef THINKPAD_ACPI_DEBUGFACILITIES
1643         driver_remove_file(drv, &driver_attr_wlsw_emulstate);
1644         driver_remove_file(drv, &driver_attr_bluetooth_emulstate);
1645         driver_remove_file(drv, &driver_attr_wwan_emulstate);
1646         driver_remove_file(drv, &driver_attr_uwb_emulstate);
1647 #endif
1648 }
1649
1650 /*************************************************************************
1651  * Firmware Data
1652  */
1653
1654 /*
1655  * Table of recommended minimum BIOS versions
1656  *
1657  * Reasons for listing:
1658  *    1. Stable BIOS, listed because the unknown ammount of
1659  *       bugs and bad ACPI behaviour on older versions
1660  *
1661  *    2. BIOS or EC fw with known bugs that trigger on Linux
1662  *
1663  *    3. BIOS with known reduced functionality in older versions
1664  *
1665  *  We recommend the latest BIOS and EC version.
1666  *  We only support the latest BIOS and EC fw version as a rule.
1667  *
1668  *  Sources: IBM ThinkPad Public Web Documents (update changelogs),
1669  *  Information from users in ThinkWiki
1670  *
1671  *  WARNING: we use this table also to detect that the machine is
1672  *  a ThinkPad in some cases, so don't remove entries lightly.
1673  */
1674
1675 #define TPV_Q(__v, __id1, __id2, __bv1, __bv2)          \
1676         { .vendor       = (__v),                        \
1677           .bios         = TPID(__id1, __id2),           \
1678           .ec           = TPACPI_MATCH_ANY,             \
1679           .quirks       = TPACPI_MATCH_ANY << 16        \
1680                           | (__bv1) << 8 | (__bv2) }
1681
1682 #define TPV_Q_X(__v, __bid1, __bid2, __bv1, __bv2,      \
1683                 __eid1, __eid2, __ev1, __ev2)           \
1684         { .vendor       = (__v),                        \
1685           .bios         = TPID(__bid1, __bid2),         \
1686           .ec           = TPID(__eid1, __eid2),         \
1687           .quirks       = (__ev1) << 24 | (__ev2) << 16 \
1688                           | (__bv1) << 8 | (__bv2) }
1689
1690 #define TPV_QI0(__id1, __id2, __bv1, __bv2) \
1691         TPV_Q(PCI_VENDOR_ID_IBM, __id1, __id2, __bv1, __bv2)
1692
1693 #define TPV_QI1(__id1, __id2, __bv1, __bv2, __ev1, __ev2) \
1694         TPV_Q_X(PCI_VENDOR_ID_IBM, __id1, __id2,        \
1695                 __bv1, __bv2, __id1, __id2, __ev1, __ev2)
1696
1697 #define TPV_QI2(__bid1, __bid2, __bv1, __bv2,           \
1698                 __eid1, __eid2, __ev1, __ev2)           \
1699         TPV_Q_X(PCI_VENDOR_ID_IBM, __bid1, __bid2,      \
1700                 __bv1, __bv2, __eid1, __eid2, __ev1, __ev2)
1701
1702 #define TPV_QL0(__id1, __id2, __bv1, __bv2) \
1703         TPV_Q(PCI_VENDOR_ID_LENOVO, __id1, __id2, __bv1, __bv2)
1704
1705 #define TPV_QL1(__id1, __id2, __bv1, __bv2, __ev1, __ev2) \
1706         TPV_Q_X(PCI_VENDOR_ID_LENOVO, __id1, __id2,     \
1707                 __bv1, __bv2, __id1, __id2, __ev1, __ev2)
1708
1709 #define TPV_QL2(__bid1, __bid2, __bv1, __bv2,           \
1710                 __eid1, __eid2, __ev1, __ev2)           \
1711         TPV_Q_X(PCI_VENDOR_ID_LENOVO, __bid1, __bid2,   \
1712                 __bv1, __bv2, __eid1, __eid2, __ev1, __ev2)
1713
1714 static const struct tpacpi_quirk tpacpi_bios_version_qtable[] __initconst = {
1715         /*  Numeric models ------------------ */
1716         /*      FW MODEL   BIOS VERS          */
1717         TPV_QI0('I', 'M',  '6', '5'),            /* 570 */
1718         TPV_QI0('I', 'U',  '2', '6'),            /* 570E */
1719         TPV_QI0('I', 'B',  '5', '4'),            /* 600 */
1720         TPV_QI0('I', 'H',  '4', '7'),            /* 600E */
1721         TPV_QI0('I', 'N',  '3', '6'),            /* 600E */
1722         TPV_QI0('I', 'T',  '5', '5'),            /* 600X */
1723         TPV_QI0('I', 'D',  '4', '8'),            /* 770, 770E, 770ED */
1724         TPV_QI0('I', 'I',  '4', '2'),            /* 770X */
1725         TPV_QI0('I', 'O',  '2', '3'),            /* 770Z */
1726
1727         /* A-series ------------------------- */
1728         /*      FW MODEL   BIOS VERS  EC VERS */
1729         TPV_QI0('I', 'W',  '5', '9'),            /* A20m */
1730         TPV_QI0('I', 'V',  '6', '9'),            /* A20p */
1731         TPV_QI0('1', '0',  '2', '6'),            /* A21e, A22e */
1732         TPV_QI0('K', 'U',  '3', '6'),            /* A21e */
1733         TPV_QI0('K', 'X',  '3', '6'),            /* A21m, A22m */
1734         TPV_QI0('K', 'Y',  '3', '8'),            /* A21p, A22p */
1735         TPV_QI0('1', 'B',  '1', '7'),            /* A22e */
1736         TPV_QI0('1', '3',  '2', '0'),            /* A22m */
1737         TPV_QI0('1', 'E',  '7', '3'),            /* A30/p (0) */
1738         TPV_QI1('1', 'G',  '4', '1',  '1', '7'), /* A31/p (0) */
1739         TPV_QI1('1', 'N',  '1', '6',  '0', '7'), /* A31/p (0) */
1740
1741         /* G-series ------------------------- */
1742         /*      FW MODEL   BIOS VERS          */
1743         TPV_QI0('1', 'T',  'A', '6'),            /* G40 */
1744         TPV_QI0('1', 'X',  '5', '7'),            /* G41 */
1745
1746         /* R-series, T-series --------------- */
1747         /*      FW MODEL   BIOS VERS  EC VERS */
1748         TPV_QI0('1', 'C',  'F', '0'),            /* R30 */
1749         TPV_QI0('1', 'F',  'F', '1'),            /* R31 */
1750         TPV_QI0('1', 'M',  '9', '7'),            /* R32 */
1751         TPV_QI0('1', 'O',  '6', '1'),            /* R40 */
1752         TPV_QI0('1', 'P',  '6', '5'),            /* R40 */
1753         TPV_QI0('1', 'S',  '7', '0'),            /* R40e */
1754         TPV_QI1('1', 'R',  'D', 'R',  '7', '1'), /* R50/p, R51,
1755                                                     T40/p, T41/p, T42/p (1) */
1756         TPV_QI1('1', 'V',  '7', '1',  '2', '8'), /* R50e, R51 (1) */
1757         TPV_QI1('7', '8',  '7', '1',  '0', '6'), /* R51e (1) */
1758         TPV_QI1('7', '6',  '6', '9',  '1', '6'), /* R52 (1) */
1759         TPV_QI1('7', '0',  '6', '9',  '2', '8'), /* R52, T43 (1) */
1760
1761         TPV_QI0('I', 'Y',  '6', '1'),            /* T20 */
1762         TPV_QI0('K', 'Z',  '3', '4'),            /* T21 */
1763         TPV_QI0('1', '6',  '3', '2'),            /* T22 */
1764         TPV_QI1('1', 'A',  '6', '4',  '2', '3'), /* T23 (0) */
1765         TPV_QI1('1', 'I',  '7', '1',  '2', '0'), /* T30 (0) */
1766         TPV_QI1('1', 'Y',  '6', '5',  '2', '9'), /* T43/p (1) */
1767
1768         TPV_QL1('7', '9',  'E', '3',  '5', '0'), /* T60/p */
1769         TPV_QL1('7', 'C',  'D', '2',  '2', '2'), /* R60, R60i */
1770         TPV_QL0('7', 'E',  'D', '0'),            /* R60e, R60i */
1771
1772         /*      BIOS FW    BIOS VERS  EC FW     EC VERS */
1773         TPV_QI2('1', 'W',  '9', '0',  '1', 'V', '2', '8'), /* R50e (1) */
1774         TPV_QL2('7', 'I',  '3', '4',  '7', '9', '5', '0'), /* T60/p wide */
1775
1776         /* X-series ------------------------- */
1777         /*      FW MODEL   BIOS VERS  EC VERS */
1778         TPV_QI0('I', 'Z',  '9', 'D'),            /* X20, X21 */
1779         TPV_QI0('1', 'D',  '7', '0'),            /* X22, X23, X24 */
1780         TPV_QI1('1', 'K',  '4', '8',  '1', '8'), /* X30 (0) */
1781         TPV_QI1('1', 'Q',  '9', '7',  '2', '3'), /* X31, X32 (0) */
1782         TPV_QI1('1', 'U',  'D', '3',  'B', '2'), /* X40 (0) */
1783         TPV_QI1('7', '4',  '6', '4',  '2', '7'), /* X41 (0) */
1784         TPV_QI1('7', '5',  '6', '0',  '2', '0'), /* X41t (0) */
1785
1786         TPV_QL0('7', 'B',  'D', '7'),            /* X60/s */
1787         TPV_QL0('7', 'J',  '3', '0'),            /* X60t */
1788
1789         /* (0) - older versions lack DMI EC fw string and functionality */
1790         /* (1) - older versions known to lack functionality */
1791 };
1792
1793 #undef TPV_QL1
1794 #undef TPV_QL0
1795 #undef TPV_QI2
1796 #undef TPV_QI1
1797 #undef TPV_QI0
1798 #undef TPV_Q_X
1799 #undef TPV_Q
1800
1801 static void __init tpacpi_check_outdated_fw(void)
1802 {
1803         unsigned long fwvers;
1804         u16 ec_version, bios_version;
1805
1806         fwvers = tpacpi_check_quirks(tpacpi_bios_version_qtable,
1807                                 ARRAY_SIZE(tpacpi_bios_version_qtable));
1808
1809         if (!fwvers)
1810                 return;
1811
1812         bios_version = fwvers & 0xffffU;
1813         ec_version = (fwvers >> 16) & 0xffffU;
1814
1815         /* note that unknown versions are set to 0x0000 and we use that */
1816         if ((bios_version > thinkpad_id.bios_release) ||
1817             (ec_version > thinkpad_id.ec_release &&
1818                                 ec_version != TPACPI_MATCH_ANY)) {
1819                 /*
1820                  * The changelogs would let us track down the exact
1821                  * reason, but it is just too much of a pain to track
1822                  * it.  We only list BIOSes that are either really
1823                  * broken, or really stable to begin with, so it is
1824                  * best if the user upgrades the firmware anyway.
1825                  */
1826                 printk(TPACPI_WARN
1827                         "WARNING: Outdated ThinkPad BIOS/EC firmware\n");
1828                 printk(TPACPI_WARN
1829                         "WARNING: This firmware may be missing critical bug "
1830                         "fixes and/or important features\n");
1831         }
1832 }
1833
1834 static bool __init tpacpi_is_fw_known(void)
1835 {
1836         return tpacpi_check_quirks(tpacpi_bios_version_qtable,
1837                         ARRAY_SIZE(tpacpi_bios_version_qtable)) != 0;
1838 }
1839
1840 /****************************************************************************
1841  ****************************************************************************
1842  *
1843  * Subdrivers
1844  *
1845  ****************************************************************************
1846  ****************************************************************************/
1847
1848 /*************************************************************************
1849  * thinkpad-acpi init subdriver
1850  */
1851
1852 static int __init thinkpad_acpi_driver_init(struct ibm_init_struct *iibm)
1853 {
1854         printk(TPACPI_INFO "%s v%s\n", TPACPI_DESC, TPACPI_VERSION);
1855         printk(TPACPI_INFO "%s\n", TPACPI_URL);
1856
1857         printk(TPACPI_INFO "ThinkPad BIOS %s, EC %s\n",
1858                 (thinkpad_id.bios_version_str) ?
1859                         thinkpad_id.bios_version_str : "unknown",
1860                 (thinkpad_id.ec_version_str) ?
1861                         thinkpad_id.ec_version_str : "unknown");
1862
1863         if (thinkpad_id.vendor && thinkpad_id.model_str)
1864                 printk(TPACPI_INFO "%s %s, model %s\n",
1865                         (thinkpad_id.vendor == PCI_VENDOR_ID_IBM) ?
1866                                 "IBM" : ((thinkpad_id.vendor ==
1867                                                 PCI_VENDOR_ID_LENOVO) ?
1868                                         "Lenovo" : "Unknown vendor"),
1869                         thinkpad_id.model_str,
1870                         (thinkpad_id.nummodel_str) ?
1871                                 thinkpad_id.nummodel_str : "unknown");
1872
1873         tpacpi_check_outdated_fw();
1874         return 0;
1875 }
1876
1877 static int thinkpad_acpi_driver_read(char *p)
1878 {
1879         int len = 0;
1880
1881         len += sprintf(p + len, "driver:\t\t%s\n", TPACPI_DESC);
1882         len += sprintf(p + len, "version:\t%s\n", TPACPI_VERSION);
1883
1884         return len;
1885 }
1886
1887 static struct ibm_struct thinkpad_acpi_driver_data = {
1888         .name = "driver",
1889         .read = thinkpad_acpi_driver_read,
1890 };
1891
1892 /*************************************************************************
1893  * Hotkey subdriver
1894  */
1895
1896 /*
1897  * ThinkPad firmware event model
1898  *
1899  * The ThinkPad firmware has two main event interfaces: normal ACPI
1900  * notifications (which follow the ACPI standard), and a private event
1901  * interface.
1902  *
1903  * The private event interface also issues events for the hotkeys.  As
1904  * the driver gained features, the event handling code ended up being
1905  * built around the hotkey subdriver.  This will need to be refactored
1906  * to a more formal event API eventually.
1907  *
1908  * Some "hotkeys" are actually supposed to be used as event reports,
1909  * such as "brightness has changed", "volume has changed", depending on
1910  * the ThinkPad model and how the firmware is operating.
1911  *
1912  * Unlike other classes, hotkey-class events have mask/unmask control on
1913  * non-ancient firmware.  However, how it behaves changes a lot with the
1914  * firmware model and version.
1915  */
1916
1917 enum {  /* hot key scan codes (derived from ACPI DSDT) */
1918         TP_ACPI_HOTKEYSCAN_FNF1         = 0,
1919         TP_ACPI_HOTKEYSCAN_FNF2,
1920         TP_ACPI_HOTKEYSCAN_FNF3,
1921         TP_ACPI_HOTKEYSCAN_FNF4,
1922         TP_ACPI_HOTKEYSCAN_FNF5,
1923         TP_ACPI_HOTKEYSCAN_FNF6,
1924         TP_ACPI_HOTKEYSCAN_FNF7,
1925         TP_ACPI_HOTKEYSCAN_FNF8,
1926         TP_ACPI_HOTKEYSCAN_FNF9,
1927         TP_ACPI_HOTKEYSCAN_FNF10,
1928         TP_ACPI_HOTKEYSCAN_FNF11,
1929         TP_ACPI_HOTKEYSCAN_FNF12,
1930         TP_ACPI_HOTKEYSCAN_FNBACKSPACE,
1931         TP_ACPI_HOTKEYSCAN_FNINSERT,
1932         TP_ACPI_HOTKEYSCAN_FNDELETE,
1933         TP_ACPI_HOTKEYSCAN_FNHOME,
1934         TP_ACPI_HOTKEYSCAN_FNEND,
1935         TP_ACPI_HOTKEYSCAN_FNPAGEUP,
1936         TP_ACPI_HOTKEYSCAN_FNPAGEDOWN,
1937         TP_ACPI_HOTKEYSCAN_FNSPACE,
1938         TP_ACPI_HOTKEYSCAN_VOLUMEUP,
1939         TP_ACPI_HOTKEYSCAN_VOLUMEDOWN,
1940         TP_ACPI_HOTKEYSCAN_MUTE,
1941         TP_ACPI_HOTKEYSCAN_THINKPAD,
1942 };
1943
1944 enum {  /* Keys/events available through NVRAM polling */
1945         TPACPI_HKEY_NVRAM_KNOWN_MASK = 0x00fb88c0U,
1946         TPACPI_HKEY_NVRAM_GOOD_MASK  = 0x00fb8000U,
1947 };
1948
1949 enum {  /* Positions of some of the keys in hotkey masks */
1950         TP_ACPI_HKEY_DISPSWTCH_MASK     = 1 << TP_ACPI_HOTKEYSCAN_FNF7,
1951         TP_ACPI_HKEY_DISPXPAND_MASK     = 1 << TP_ACPI_HOTKEYSCAN_FNF8,
1952         TP_ACPI_HKEY_HIBERNATE_MASK     = 1 << TP_ACPI_HOTKEYSCAN_FNF12,
1953         TP_ACPI_HKEY_BRGHTUP_MASK       = 1 << TP_ACPI_HOTKEYSCAN_FNHOME,
1954         TP_ACPI_HKEY_BRGHTDWN_MASK      = 1 << TP_ACPI_HOTKEYSCAN_FNEND,
1955         TP_ACPI_HKEY_THNKLGHT_MASK      = 1 << TP_ACPI_HOTKEYSCAN_FNPAGEUP,
1956         TP_ACPI_HKEY_ZOOM_MASK          = 1 << TP_ACPI_HOTKEYSCAN_FNSPACE,
1957         TP_ACPI_HKEY_VOLUP_MASK         = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEUP,
1958         TP_ACPI_HKEY_VOLDWN_MASK        = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEDOWN,
1959         TP_ACPI_HKEY_MUTE_MASK          = 1 << TP_ACPI_HOTKEYSCAN_MUTE,
1960         TP_ACPI_HKEY_THINKPAD_MASK      = 1 << TP_ACPI_HOTKEYSCAN_THINKPAD,
1961 };
1962
1963 enum {  /* NVRAM to ACPI HKEY group map */
1964         TP_NVRAM_HKEY_GROUP_HK2         = TP_ACPI_HKEY_THINKPAD_MASK |
1965                                           TP_ACPI_HKEY_ZOOM_MASK |
1966                                           TP_ACPI_HKEY_DISPSWTCH_MASK |
1967                                           TP_ACPI_HKEY_HIBERNATE_MASK,
1968         TP_NVRAM_HKEY_GROUP_BRIGHTNESS  = TP_ACPI_HKEY_BRGHTUP_MASK |
1969                                           TP_ACPI_HKEY_BRGHTDWN_MASK,
1970         TP_NVRAM_HKEY_GROUP_VOLUME      = TP_ACPI_HKEY_VOLUP_MASK |
1971                                           TP_ACPI_HKEY_VOLDWN_MASK |
1972                                           TP_ACPI_HKEY_MUTE_MASK,
1973 };
1974
1975 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1976 struct tp_nvram_state {
1977        u16 thinkpad_toggle:1;
1978        u16 zoom_toggle:1;
1979        u16 display_toggle:1;
1980        u16 thinklight_toggle:1;
1981        u16 hibernate_toggle:1;
1982        u16 displayexp_toggle:1;
1983        u16 display_state:1;
1984        u16 brightness_toggle:1;
1985        u16 volume_toggle:1;
1986        u16 mute:1;
1987
1988        u8 brightness_level;
1989        u8 volume_level;
1990 };
1991
1992 /* kthread for the hotkey poller */
1993 static struct task_struct *tpacpi_hotkey_task;
1994
1995 /* Acquired while the poller kthread is running, use to sync start/stop */
1996 static struct mutex hotkey_thread_mutex;
1997
1998 /*
1999  * Acquire mutex to write poller control variables as an
2000  * atomic block.
2001  *
2002  * Increment hotkey_config_change when changing them if you
2003  * want the kthread to forget old state.
2004  *
2005  * See HOTKEY_CONFIG_CRITICAL_START/HOTKEY_CONFIG_CRITICAL_END
2006  */
2007 static struct mutex hotkey_thread_data_mutex;
2008 static unsigned int hotkey_config_change;
2009
2010 /*
2011  * hotkey poller control variables
2012  *
2013  * Must be atomic or readers will also need to acquire mutex
2014  *
2015  * HOTKEY_CONFIG_CRITICAL_START/HOTKEY_CONFIG_CRITICAL_END
2016  * should be used only when the changes need to be taken as
2017  * a block, OR when one needs to force the kthread to forget
2018  * old state.
2019  */
2020 static u32 hotkey_source_mask;          /* bit mask 0=ACPI,1=NVRAM */
2021 static unsigned int hotkey_poll_freq = 10; /* Hz */
2022
2023 #define HOTKEY_CONFIG_CRITICAL_START \
2024         do { \
2025                 mutex_lock(&hotkey_thread_data_mutex); \
2026                 hotkey_config_change++; \
2027         } while (0);
2028 #define HOTKEY_CONFIG_CRITICAL_END \
2029         mutex_unlock(&hotkey_thread_data_mutex);
2030
2031 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2032
2033 #define hotkey_source_mask 0U
2034 #define HOTKEY_CONFIG_CRITICAL_START
2035 #define HOTKEY_CONFIG_CRITICAL_END
2036
2037 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2038
2039 static struct mutex hotkey_mutex;
2040
2041 static enum {   /* Reasons for waking up */
2042         TP_ACPI_WAKEUP_NONE = 0,        /* None or unknown */
2043         TP_ACPI_WAKEUP_BAYEJ,           /* Bay ejection request */
2044         TP_ACPI_WAKEUP_UNDOCK,          /* Undock request */
2045 } hotkey_wakeup_reason;
2046
2047 static int hotkey_autosleep_ack;
2048
2049 static u32 hotkey_orig_mask;            /* events the BIOS had enabled */
2050 static u32 hotkey_all_mask;             /* all events supported in fw */
2051 static u32 hotkey_reserved_mask;        /* events better left disabled */
2052 static u32 hotkey_driver_mask;          /* events needed by the driver */
2053 static u32 hotkey_user_mask;            /* events visible to userspace */
2054 static u32 hotkey_acpi_mask;            /* events enabled in firmware */
2055
2056 static unsigned int hotkey_report_mode;
2057
2058 static u16 *hotkey_keycode_map;
2059
2060 static struct attribute_set *hotkey_dev_attributes;
2061
2062 static void tpacpi_driver_event(const unsigned int hkey_event);
2063 static void hotkey_driver_event(const unsigned int scancode);
2064
2065 /* HKEY.MHKG() return bits */
2066 #define TP_HOTKEY_TABLET_MASK (1 << 3)
2067
2068 static int hotkey_get_wlsw(void)
2069 {
2070         int status;
2071
2072         if (!tp_features.hotkey_wlsw)
2073                 return -ENODEV;
2074
2075 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
2076         if (dbg_wlswemul)
2077                 return (tpacpi_wlsw_emulstate) ?
2078                                 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
2079 #endif
2080
2081         if (!acpi_evalf(hkey_handle, &status, "WLSW", "d"))
2082                 return -EIO;
2083
2084         return (status) ? TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
2085 }
2086
2087 static int hotkey_get_tablet_mode(int *status)
2088 {
2089         int s;
2090
2091         if (!acpi_evalf(hkey_handle, &s, "MHKG", "d"))
2092                 return -EIO;
2093
2094         *status = ((s & TP_HOTKEY_TABLET_MASK) != 0);
2095         return 0;
2096 }
2097
2098 /*
2099  * Reads current event mask from firmware, and updates
2100  * hotkey_acpi_mask accordingly.  Also resets any bits
2101  * from hotkey_user_mask that are unavailable to be
2102  * delivered (shadow requirement of the userspace ABI).
2103  *
2104  * Call with hotkey_mutex held
2105  */
2106 static int hotkey_mask_get(void)
2107 {
2108         if (tp_features.hotkey_mask) {
2109                 u32 m = 0;
2110
2111                 if (!acpi_evalf(hkey_handle, &m, "DHKN", "d"))
2112                         return -EIO;
2113
2114                 hotkey_acpi_mask = m;
2115         } else {
2116                 /* no mask support doesn't mean no event support... */
2117                 hotkey_acpi_mask = hotkey_all_mask;
2118         }
2119
2120         /* sync userspace-visible mask */
2121         hotkey_user_mask &= (hotkey_acpi_mask | hotkey_source_mask);
2122
2123         return 0;
2124 }
2125
2126 void static hotkey_mask_warn_incomplete_mask(void)
2127 {
2128         /* log only what the user can fix... */
2129         const u32 wantedmask = hotkey_driver_mask &
2130                 ~(hotkey_acpi_mask | hotkey_source_mask) &
2131                 (hotkey_all_mask | TPACPI_HKEY_NVRAM_KNOWN_MASK);
2132
2133         if (wantedmask)
2134                 printk(TPACPI_NOTICE
2135                         "required events 0x%08x not enabled!\n",
2136                         wantedmask);
2137 }
2138
2139 /*
2140  * Set the firmware mask when supported
2141  *
2142  * Also calls hotkey_mask_get to update hotkey_acpi_mask.
2143  *
2144  * NOTE: does not set bits in hotkey_user_mask, but may reset them.
2145  *
2146  * Call with hotkey_mutex held
2147  */
2148 static int hotkey_mask_set(u32 mask)
2149 {
2150         int i;
2151         int rc = 0;
2152
2153         const u32 fwmask = mask & ~hotkey_source_mask;
2154
2155         if (tp_features.hotkey_mask) {
2156                 for (i = 0; i < 32; i++) {
2157                         if (!acpi_evalf(hkey_handle,
2158                                         NULL, "MHKM", "vdd", i + 1,
2159                                         !!(mask & (1 << i)))) {
2160                                 rc = -EIO;
2161                                 break;
2162                         }
2163                 }
2164         }
2165
2166         /*
2167          * We *must* make an inconditional call to hotkey_mask_get to
2168          * refresh hotkey_acpi_mask and update hotkey_user_mask
2169          *
2170          * Take the opportunity to also log when we cannot _enable_
2171          * a given event.
2172          */
2173         if (!hotkey_mask_get() && !rc && (fwmask & ~hotkey_acpi_mask)) {
2174                 printk(TPACPI_NOTICE
2175                        "asked for hotkey mask 0x%08x, but "
2176                        "firmware forced it to 0x%08x\n",
2177                        fwmask, hotkey_acpi_mask);
2178         }
2179
2180         hotkey_mask_warn_incomplete_mask();
2181
2182         return rc;
2183 }
2184
2185 /*
2186  * Sets hotkey_user_mask and tries to set the firmware mask
2187  *
2188  * Call with hotkey_mutex held
2189  */
2190 static int hotkey_user_mask_set(const u32 mask)
2191 {
2192         int rc;
2193
2194         /* Give people a chance to notice they are doing something that
2195          * is bound to go boom on their users sooner or later */
2196         if (!tp_warned.hotkey_mask_ff &&
2197             (mask == 0xffff || mask == 0xffffff ||
2198              mask == 0xffffffff)) {
2199                 tp_warned.hotkey_mask_ff = 1;
2200                 printk(TPACPI_NOTICE
2201                        "setting the hotkey mask to 0x%08x is likely "
2202                        "not the best way to go about it\n", mask);
2203                 printk(TPACPI_NOTICE
2204                        "please consider using the driver defaults, "
2205                        "and refer to up-to-date thinkpad-acpi "
2206                        "documentation\n");
2207         }
2208
2209         /* Try to enable what the user asked for, plus whatever we need.
2210          * this syncs everything but won't enable bits in hotkey_user_mask */
2211         rc = hotkey_mask_set((mask | hotkey_driver_mask) & ~hotkey_source_mask);
2212
2213         /* Enable the available bits in hotkey_user_mask */
2214         hotkey_user_mask = mask & (hotkey_acpi_mask | hotkey_source_mask);
2215
2216         return rc;
2217 }
2218
2219 /*
2220  * Sets the driver hotkey mask.
2221  *
2222  * Can be called even if the hotkey subdriver is inactive
2223  */
2224 static int tpacpi_hotkey_driver_mask_set(const u32 mask)
2225 {
2226         int rc;
2227
2228         /* Do the right thing if hotkey_init has not been called yet */
2229         if (!tp_features.hotkey) {
2230                 hotkey_driver_mask = mask;
2231                 return 0;
2232         }
2233
2234         mutex_lock(&hotkey_mutex);
2235
2236         HOTKEY_CONFIG_CRITICAL_START
2237         hotkey_driver_mask = mask;
2238 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2239         hotkey_source_mask |= (mask & ~hotkey_all_mask);
2240 #endif
2241         HOTKEY_CONFIG_CRITICAL_END
2242
2243         rc = hotkey_mask_set((hotkey_acpi_mask | hotkey_driver_mask) &
2244                                                         ~hotkey_source_mask);
2245         mutex_unlock(&hotkey_mutex);
2246
2247         return rc;
2248 }
2249
2250 static int hotkey_status_get(int *status)
2251 {
2252         if (!acpi_evalf(hkey_handle, status, "DHKC", "d"))
2253                 return -EIO;
2254
2255         return 0;
2256 }
2257
2258 static int hotkey_status_set(bool enable)
2259 {
2260         if (!acpi_evalf(hkey_handle, NULL, "MHKC", "vd", enable ? 1 : 0))
2261                 return -EIO;
2262
2263         return 0;
2264 }
2265
2266 static void tpacpi_input_send_tabletsw(void)
2267 {
2268         int state;
2269
2270         if (tp_features.hotkey_tablet &&
2271             !hotkey_get_tablet_mode(&state)) {
2272                 mutex_lock(&tpacpi_inputdev_send_mutex);
2273
2274                 input_report_switch(tpacpi_inputdev,
2275                                     SW_TABLET_MODE, !!state);
2276                 input_sync(tpacpi_inputdev);
2277
2278                 mutex_unlock(&tpacpi_inputdev_send_mutex);
2279         }
2280 }
2281
2282 /* Do NOT call without validating scancode first */
2283 static void tpacpi_input_send_key(const unsigned int scancode)
2284 {
2285         const unsigned int keycode = hotkey_keycode_map[scancode];
2286
2287         if (keycode != KEY_RESERVED) {
2288                 mutex_lock(&tpacpi_inputdev_send_mutex);
2289
2290                 input_report_key(tpacpi_inputdev, keycode, 1);
2291                 if (keycode == KEY_UNKNOWN)
2292                         input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN,
2293                                     scancode);
2294                 input_sync(tpacpi_inputdev);
2295
2296                 input_report_key(tpacpi_inputdev, keycode, 0);
2297                 if (keycode == KEY_UNKNOWN)
2298                         input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN,
2299                                     scancode);
2300                 input_sync(tpacpi_inputdev);
2301
2302                 mutex_unlock(&tpacpi_inputdev_send_mutex);
2303         }
2304 }
2305
2306 /* Do NOT call without validating scancode first */
2307 static void tpacpi_input_send_key_masked(const unsigned int scancode)
2308 {
2309         hotkey_driver_event(scancode);
2310         if (hotkey_user_mask & (1 << scancode))
2311                 tpacpi_input_send_key(scancode);
2312 }
2313
2314 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2315 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver;
2316
2317 /* Do NOT call without validating scancode first */
2318 static void tpacpi_hotkey_send_key(unsigned int scancode)
2319 {
2320         tpacpi_input_send_key_masked(scancode);
2321         if (hotkey_report_mode < 2) {
2322                 acpi_bus_generate_proc_event(ibm_hotkey_acpidriver.device,
2323                                 0x80, TP_HKEY_EV_HOTKEY_BASE + scancode);
2324         }
2325 }
2326
2327 static void hotkey_read_nvram(struct tp_nvram_state *n, const u32 m)
2328 {
2329         u8 d;
2330
2331         if (m & TP_NVRAM_HKEY_GROUP_HK2) {
2332                 d = nvram_read_byte(TP_NVRAM_ADDR_HK2);
2333                 n->thinkpad_toggle = !!(d & TP_NVRAM_MASK_HKT_THINKPAD);
2334                 n->zoom_toggle = !!(d & TP_NVRAM_MASK_HKT_ZOOM);
2335                 n->display_toggle = !!(d & TP_NVRAM_MASK_HKT_DISPLAY);
2336                 n->hibernate_toggle = !!(d & TP_NVRAM_MASK_HKT_HIBERNATE);
2337         }
2338         if (m & TP_ACPI_HKEY_THNKLGHT_MASK) {
2339                 d = nvram_read_byte(TP_NVRAM_ADDR_THINKLIGHT);
2340                 n->thinklight_toggle = !!(d & TP_NVRAM_MASK_THINKLIGHT);
2341         }
2342         if (m & TP_ACPI_HKEY_DISPXPAND_MASK) {
2343                 d = nvram_read_byte(TP_NVRAM_ADDR_VIDEO);
2344                 n->displayexp_toggle =
2345                                 !!(d & TP_NVRAM_MASK_HKT_DISPEXPND);
2346         }
2347         if (m & TP_NVRAM_HKEY_GROUP_BRIGHTNESS) {
2348                 d = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS);
2349                 n->brightness_level = (d & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
2350                                 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
2351                 n->brightness_toggle =
2352                                 !!(d & TP_NVRAM_MASK_HKT_BRIGHTNESS);
2353         }
2354         if (m & TP_NVRAM_HKEY_GROUP_VOLUME) {
2355                 d = nvram_read_byte(TP_NVRAM_ADDR_MIXER);
2356                 n->volume_level = (d & TP_NVRAM_MASK_LEVEL_VOLUME)
2357                                 >> TP_NVRAM_POS_LEVEL_VOLUME;
2358                 n->mute = !!(d & TP_NVRAM_MASK_MUTE);
2359                 n->volume_toggle = !!(d & TP_NVRAM_MASK_HKT_VOLUME);
2360         }
2361 }
2362
2363 static void hotkey_compare_and_issue_event(struct tp_nvram_state *oldn,
2364                                            struct tp_nvram_state *newn,
2365                                            const u32 event_mask)
2366 {
2367
2368 #define TPACPI_COMPARE_KEY(__scancode, __member) \
2369         do { \
2370                 if ((event_mask & (1 << __scancode)) && \
2371                     oldn->__member != newn->__member) \
2372                         tpacpi_hotkey_send_key(__scancode); \
2373         } while (0)
2374
2375 #define TPACPI_MAY_SEND_KEY(__scancode) \
2376         do { \
2377                 if (event_mask & (1 << __scancode)) \
2378                         tpacpi_hotkey_send_key(__scancode); \
2379         } while (0)
2380
2381         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_THINKPAD, thinkpad_toggle);
2382         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNSPACE, zoom_toggle);
2383         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF7, display_toggle);
2384         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF12, hibernate_toggle);
2385
2386         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNPAGEUP, thinklight_toggle);
2387
2388         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF8, displayexp_toggle);
2389
2390         /* handle volume */
2391         if (oldn->volume_toggle != newn->volume_toggle) {
2392                 if (oldn->mute != newn->mute) {
2393                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE);
2394                 }
2395                 if (oldn->volume_level > newn->volume_level) {
2396                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
2397                 } else if (oldn->volume_level < newn->volume_level) {
2398                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
2399                 } else if (oldn->mute == newn->mute) {
2400                         /* repeated key presses that didn't change state */
2401                         if (newn->mute) {
2402                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE);
2403                         } else if (newn->volume_level != 0) {
2404                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
2405                         } else {
2406                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
2407                         }
2408                 }
2409         }
2410
2411         /* handle brightness */
2412         if (oldn->brightness_toggle != newn->brightness_toggle) {
2413                 if (oldn->brightness_level < newn->brightness_level) {
2414                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
2415                 } else if (oldn->brightness_level > newn->brightness_level) {
2416                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
2417                 } else {
2418                         /* repeated key presses that didn't change state */
2419                         if (newn->brightness_level != 0) {
2420                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
2421                         } else {
2422                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
2423                         }
2424                 }
2425         }
2426
2427 #undef TPACPI_COMPARE_KEY
2428 #undef TPACPI_MAY_SEND_KEY
2429 }
2430
2431 /*
2432  * Polling driver
2433  *
2434  * We track all events in hotkey_source_mask all the time, since
2435  * most of them are edge-based.  We only issue those requested by
2436  * hotkey_user_mask or hotkey_driver_mask, though.
2437  */
2438 static int hotkey_kthread(void *data)
2439 {
2440         struct tp_nvram_state s[2];
2441         u32 poll_mask, event_mask;
2442         unsigned int si, so;
2443         unsigned long t;
2444         unsigned int change_detector, must_reset;
2445         unsigned int poll_freq;
2446
2447         mutex_lock(&hotkey_thread_mutex);
2448
2449         if (tpacpi_lifecycle == TPACPI_LIFE_EXITING)
2450                 goto exit;
2451
2452         set_freezable();
2453
2454         so = 0;
2455         si = 1;
2456         t = 0;
2457
2458         /* Initial state for compares */
2459         mutex_lock(&hotkey_thread_data_mutex);
2460         change_detector = hotkey_config_change;
2461         poll_mask = hotkey_source_mask;
2462         event_mask = hotkey_source_mask &
2463                         (hotkey_driver_mask | hotkey_user_mask);
2464         poll_freq = hotkey_poll_freq;
2465         mutex_unlock(&hotkey_thread_data_mutex);
2466         hotkey_read_nvram(&s[so], poll_mask);
2467
2468         while (!kthread_should_stop()) {
2469                 if (t == 0) {
2470                         if (likely(poll_freq))
2471                                 t = 1000/poll_freq;
2472                         else
2473                                 t = 100;        /* should never happen... */
2474                 }
2475                 t = msleep_interruptible(t);
2476                 if (unlikely(kthread_should_stop()))
2477                         break;
2478                 must_reset = try_to_freeze();
2479                 if (t > 0 && !must_reset)
2480                         continue;
2481
2482                 mutex_lock(&hotkey_thread_data_mutex);
2483                 if (must_reset || hotkey_config_change != change_detector) {
2484                         /* forget old state on thaw or config change */
2485                         si = so;
2486                         t = 0;
2487                         change_detector = hotkey_config_change;
2488                 }
2489                 poll_mask = hotkey_source_mask;
2490                 event_mask = hotkey_source_mask &
2491                                 (hotkey_driver_mask | hotkey_user_mask);
2492                 poll_freq = hotkey_poll_freq;
2493                 mutex_unlock(&hotkey_thread_data_mutex);
2494
2495                 if (likely(poll_mask)) {
2496                         hotkey_read_nvram(&s[si], poll_mask);
2497                         if (likely(si != so)) {
2498                                 hotkey_compare_and_issue_event(&s[so], &s[si],
2499                                                                 event_mask);
2500                         }
2501                 }
2502
2503                 so = si;
2504                 si ^= 1;
2505         }
2506
2507 exit:
2508         mutex_unlock(&hotkey_thread_mutex);
2509         return 0;
2510 }
2511
2512 /* call with hotkey_mutex held */
2513 static void hotkey_poll_stop_sync(void)
2514 {
2515         if (tpacpi_hotkey_task) {
2516                 if (frozen(tpacpi_hotkey_task) ||
2517                     freezing(tpacpi_hotkey_task))
2518                         thaw_process(tpacpi_hotkey_task);
2519
2520                 kthread_stop(tpacpi_hotkey_task);
2521                 tpacpi_hotkey_task = NULL;
2522                 mutex_lock(&hotkey_thread_mutex);
2523                 /* at this point, the thread did exit */
2524                 mutex_unlock(&hotkey_thread_mutex);
2525         }
2526 }
2527
2528 /* call with hotkey_mutex held */
2529 static void hotkey_poll_setup(bool may_warn)
2530 {
2531         const u32 poll_driver_mask = hotkey_driver_mask & hotkey_source_mask;
2532         const u32 poll_user_mask = hotkey_user_mask & hotkey_source_mask;
2533
2534         if (hotkey_poll_freq > 0 &&
2535             (poll_driver_mask ||
2536              (poll_user_mask && tpacpi_inputdev->users > 0))) {
2537                 if (!tpacpi_hotkey_task) {
2538                         tpacpi_hotkey_task = kthread_run(hotkey_kthread,
2539                                         NULL, TPACPI_NVRAM_KTHREAD_NAME);
2540                         if (IS_ERR(tpacpi_hotkey_task)) {
2541                                 tpacpi_hotkey_task = NULL;
2542                                 printk(TPACPI_ERR
2543                                        "could not create kernel thread "
2544                                        "for hotkey polling\n");
2545                         }
2546                 }
2547         } else {
2548                 hotkey_poll_stop_sync();
2549                 if (may_warn && (poll_driver_mask || poll_user_mask) &&
2550                     hotkey_poll_freq == 0) {
2551                         printk(TPACPI_NOTICE
2552                                 "hot keys 0x%08x and/or events 0x%08x "
2553                                 "require polling, which is currently "
2554                                 "disabled\n",
2555                                 poll_user_mask, poll_driver_mask);
2556                 }
2557         }
2558 }
2559
2560 static void hotkey_poll_setup_safe(bool may_warn)
2561 {
2562         mutex_lock(&hotkey_mutex);
2563         hotkey_poll_setup(may_warn);
2564         mutex_unlock(&hotkey_mutex);
2565 }
2566
2567 /* call with hotkey_mutex held */
2568 static void hotkey_poll_set_freq(unsigned int freq)
2569 {
2570         if (!freq)
2571                 hotkey_poll_stop_sync();
2572
2573         hotkey_poll_freq = freq;
2574 }
2575
2576 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2577
2578 static void hotkey_poll_setup_safe(bool __unused)
2579 {
2580 }
2581
2582 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2583
2584 static int hotkey_inputdev_open(struct input_dev *dev)
2585 {
2586         switch (tpacpi_lifecycle) {
2587         case TPACPI_LIFE_INIT:
2588                 /*
2589                  * hotkey_init will call hotkey_poll_setup_safe
2590                  * at the appropriate moment
2591                  */
2592                 return 0;
2593         case TPACPI_LIFE_EXITING:
2594                 return -EBUSY;
2595         case TPACPI_LIFE_RUNNING:
2596                 hotkey_poll_setup_safe(false);
2597                 return 0;
2598         }
2599
2600         /* Should only happen if tpacpi_lifecycle is corrupt */
2601         BUG();
2602         return -EBUSY;
2603 }
2604
2605 static void hotkey_inputdev_close(struct input_dev *dev)
2606 {
2607         /* disable hotkey polling when possible */
2608         if (tpacpi_lifecycle == TPACPI_LIFE_RUNNING &&
2609             !(hotkey_source_mask & hotkey_driver_mask))
2610                 hotkey_poll_setup_safe(false);
2611 }
2612
2613 /* sysfs hotkey enable ------------------------------------------------- */
2614 static ssize_t hotkey_enable_show(struct device *dev,
2615                            struct device_attribute *attr,
2616                            char *buf)
2617 {
2618         int res, status;
2619
2620         printk_deprecated_attribute("hotkey_enable",
2621                         "Hotkey reporting is always enabled");
2622
2623         res = hotkey_status_get(&status);
2624         if (res)
2625                 return res;
2626
2627         return snprintf(buf, PAGE_SIZE, "%d\n", status);
2628 }
2629
2630 static ssize_t hotkey_enable_store(struct device *dev,
2631                             struct device_attribute *attr,
2632                             const char *buf, size_t count)
2633 {
2634         unsigned long t;
2635
2636         printk_deprecated_attribute("hotkey_enable",
2637                         "Hotkeys can be disabled through hotkey_mask");
2638
2639         if (parse_strtoul(buf, 1, &t))
2640                 return -EINVAL;
2641
2642         if (t == 0)
2643                 return -EPERM;
2644
2645         return count;
2646 }
2647
2648 static struct device_attribute dev_attr_hotkey_enable =
2649         __ATTR(hotkey_enable, S_IWUSR | S_IRUGO,
2650                 hotkey_enable_show, hotkey_enable_store);
2651
2652 /* sysfs hotkey mask --------------------------------------------------- */
2653 static ssize_t hotkey_mask_show(struct device *dev,
2654                            struct device_attribute *attr,
2655                            char *buf)
2656 {
2657         return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_user_mask);
2658 }
2659
2660 static ssize_t hotkey_mask_store(struct device *dev,
2661                             struct device_attribute *attr,
2662                             const char *buf, size_t count)
2663 {
2664         unsigned long t;
2665         int res;
2666
2667         if (parse_strtoul(buf, 0xffffffffUL, &t))
2668                 return -EINVAL;
2669
2670         if (mutex_lock_killable(&hotkey_mutex))
2671                 return -ERESTARTSYS;
2672
2673         res = hotkey_user_mask_set(t);
2674
2675 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2676         hotkey_poll_setup(true);
2677 #endif
2678
2679         mutex_unlock(&hotkey_mutex);
2680
2681         tpacpi_disclose_usertask("hotkey_mask", "set to 0x%08lx\n", t);
2682
2683         return (res) ? res : count;
2684 }
2685
2686 static struct device_attribute dev_attr_hotkey_mask =
2687         __ATTR(hotkey_mask, S_IWUSR | S_IRUGO,
2688                 hotkey_mask_show, hotkey_mask_store);
2689
2690 /* sysfs hotkey bios_enabled ------------------------------------------- */
2691 static ssize_t hotkey_bios_enabled_show(struct device *dev,
2692                            struct device_attribute *attr,
2693                            char *buf)
2694 {
2695         return sprintf(buf, "0\n");
2696 }
2697
2698 static struct device_attribute dev_attr_hotkey_bios_enabled =
2699         __ATTR(hotkey_bios_enabled, S_IRUGO, hotkey_bios_enabled_show, NULL);
2700
2701 /* sysfs hotkey bios_mask ---------------------------------------------- */
2702 static ssize_t hotkey_bios_mask_show(struct device *dev,
2703                            struct device_attribute *attr,
2704                            char *buf)
2705 {
2706         printk_deprecated_attribute("hotkey_bios_mask",
2707                         "This attribute is useless.");
2708         return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_orig_mask);
2709 }
2710
2711 static struct device_attribute dev_attr_hotkey_bios_mask =
2712         __ATTR(hotkey_bios_mask, S_IRUGO, hotkey_bios_mask_show, NULL);
2713
2714 /* sysfs hotkey all_mask ----------------------------------------------- */
2715 static ssize_t hotkey_all_mask_show(struct device *dev,
2716                            struct device_attribute *attr,
2717                            char *buf)
2718 {
2719         return snprintf(buf, PAGE_SIZE, "0x%08x\n",
2720                                 hotkey_all_mask | hotkey_source_mask);
2721 }
2722
2723 static struct device_attribute dev_attr_hotkey_all_mask =
2724         __ATTR(hotkey_all_mask, S_IRUGO, hotkey_all_mask_show, NULL);
2725
2726 /* sysfs hotkey recommended_mask --------------------------------------- */
2727 static ssize_t hotkey_recommended_mask_show(struct device *dev,
2728                                             struct device_attribute *attr,
2729                                             char *buf)
2730 {
2731         return snprintf(buf, PAGE_SIZE, "0x%08x\n",
2732                         (hotkey_all_mask | hotkey_source_mask)
2733                         & ~hotkey_reserved_mask);
2734 }
2735
2736 static struct device_attribute dev_attr_hotkey_recommended_mask =
2737         __ATTR(hotkey_recommended_mask, S_IRUGO,
2738                 hotkey_recommended_mask_show, NULL);
2739
2740 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2741
2742 /* sysfs hotkey hotkey_source_mask ------------------------------------- */
2743 static ssize_t hotkey_source_mask_show(struct device *dev,
2744                            struct device_attribute *attr,
2745                            char *buf)
2746 {
2747         return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_source_mask);
2748 }
2749
2750 static ssize_t hotkey_source_mask_store(struct device *dev,
2751                             struct device_attribute *attr,
2752                             const char *buf, size_t count)
2753 {
2754         unsigned long t;
2755         u32 r_ev;
2756         int rc;
2757
2758         if (parse_strtoul(buf, 0xffffffffUL, &t) ||
2759                 ((t & ~TPACPI_HKEY_NVRAM_KNOWN_MASK) != 0))
2760                 return -EINVAL;
2761
2762         if (mutex_lock_killable(&hotkey_mutex))
2763                 return -ERESTARTSYS;
2764
2765         HOTKEY_CONFIG_CRITICAL_START
2766         hotkey_source_mask = t;
2767         HOTKEY_CONFIG_CRITICAL_END
2768
2769         rc = hotkey_mask_set((hotkey_user_mask | hotkey_driver_mask) &
2770                         ~hotkey_source_mask);
2771         hotkey_poll_setup(true);
2772
2773         /* check if events needed by the driver got disabled */
2774         r_ev = hotkey_driver_mask & ~(hotkey_acpi_mask & hotkey_all_mask)
2775                 & ~hotkey_source_mask & TPACPI_HKEY_NVRAM_KNOWN_MASK;
2776
2777         mutex_unlock(&hotkey_mutex);
2778
2779         if (rc < 0)
2780                 printk(TPACPI_ERR "hotkey_source_mask: failed to update the"
2781                         "firmware event mask!\n");
2782
2783         if (r_ev)
2784                 printk(TPACPI_NOTICE "hotkey_source_mask: "
2785                         "some important events were disabled: "
2786                         "0x%04x\n", r_ev);
2787
2788         tpacpi_disclose_usertask("hotkey_source_mask", "set to 0x%08lx\n", t);
2789
2790         return (rc < 0) ? rc : count;
2791 }
2792
2793 static struct device_attribute dev_attr_hotkey_source_mask =
2794         __ATTR(hotkey_source_mask, S_IWUSR | S_IRUGO,
2795                 hotkey_source_mask_show, hotkey_source_mask_store);
2796
2797 /* sysfs hotkey hotkey_poll_freq --------------------------------------- */
2798 static ssize_t hotkey_poll_freq_show(struct device *dev,
2799                            struct device_attribute *attr,
2800                            char *buf)
2801 {
2802         return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_poll_freq);
2803 }
2804
2805 static ssize_t hotkey_poll_freq_store(struct device *dev,
2806                             struct device_attribute *attr,
2807                             const char *buf, size_t count)
2808 {
2809         unsigned long t;
2810
2811         if (parse_strtoul(buf, 25, &t))
2812                 return -EINVAL;
2813
2814         if (mutex_lock_killable(&hotkey_mutex))
2815                 return -ERESTARTSYS;
2816
2817         hotkey_poll_set_freq(t);
2818         hotkey_poll_setup(true);
2819
2820         mutex_unlock(&hotkey_mutex);
2821
2822         tpacpi_disclose_usertask("hotkey_poll_freq", "set to %lu\n", t);
2823
2824         return count;
2825 }
2826
2827 static struct device_attribute dev_attr_hotkey_poll_freq =
2828         __ATTR(hotkey_poll_freq, S_IWUSR | S_IRUGO,
2829                 hotkey_poll_freq_show, hotkey_poll_freq_store);
2830
2831 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2832
2833 /* sysfs hotkey radio_sw (pollable) ------------------------------------ */
2834 static ssize_t hotkey_radio_sw_show(struct device *dev,
2835                            struct device_attribute *attr,
2836                            char *buf)
2837 {
2838         int res;
2839         res = hotkey_get_wlsw();
2840         if (res < 0)
2841                 return res;
2842
2843         /* Opportunistic update */
2844         tpacpi_rfk_update_hwblock_state((res == TPACPI_RFK_RADIO_OFF));
2845
2846         return snprintf(buf, PAGE_SIZE, "%d\n",
2847                         (res == TPACPI_RFK_RADIO_OFF) ? 0 : 1);
2848 }
2849
2850 static struct device_attribute dev_attr_hotkey_radio_sw =
2851         __ATTR(hotkey_radio_sw, S_IRUGO, hotkey_radio_sw_show, NULL);
2852
2853 static void hotkey_radio_sw_notify_change(void)
2854 {
2855         if (tp_features.hotkey_wlsw)
2856                 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2857                              "hotkey_radio_sw");
2858 }
2859
2860 /* sysfs hotkey tablet mode (pollable) --------------------------------- */
2861 static ssize_t hotkey_tablet_mode_show(struct device *dev,
2862                            struct device_attribute *attr,
2863                            char *buf)
2864 {
2865         int res, s;
2866         res = hotkey_get_tablet_mode(&s);
2867         if (res < 0)
2868                 return res;
2869
2870         return snprintf(buf, PAGE_SIZE, "%d\n", !!s);
2871 }
2872
2873 static struct device_attribute dev_attr_hotkey_tablet_mode =
2874         __ATTR(hotkey_tablet_mode, S_IRUGO, hotkey_tablet_mode_show, NULL);
2875
2876 static void hotkey_tablet_mode_notify_change(void)
2877 {
2878         if (tp_features.hotkey_tablet)
2879                 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2880                              "hotkey_tablet_mode");
2881 }
2882
2883 /* sysfs hotkey report_mode -------------------------------------------- */
2884 static ssize_t hotkey_report_mode_show(struct device *dev,
2885                            struct device_attribute *attr,
2886                            char *buf)
2887 {
2888         return snprintf(buf, PAGE_SIZE, "%d\n",
2889                 (hotkey_report_mode != 0) ? hotkey_report_mode : 1);
2890 }
2891
2892 static struct device_attribute dev_attr_hotkey_report_mode =
2893         __ATTR(hotkey_report_mode, S_IRUGO, hotkey_report_mode_show, NULL);
2894
2895 /* sysfs wakeup reason (pollable) -------------------------------------- */
2896 static ssize_t hotkey_wakeup_reason_show(struct device *dev,
2897                            struct device_attribute *attr,
2898                            char *buf)
2899 {
2900         return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_wakeup_reason);
2901 }
2902
2903 static struct device_attribute dev_attr_hotkey_wakeup_reason =
2904         __ATTR(wakeup_reason, S_IRUGO, hotkey_wakeup_reason_show, NULL);
2905
2906 static void hotkey_wakeup_reason_notify_change(void)
2907 {
2908         sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2909                      "wakeup_reason");
2910 }
2911
2912 /* sysfs wakeup hotunplug_complete (pollable) -------------------------- */
2913 static ssize_t hotkey_wakeup_hotunplug_complete_show(struct device *dev,
2914                            struct device_attribute *attr,
2915                            char *buf)
2916 {
2917         return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_autosleep_ack);
2918 }
2919
2920 static struct device_attribute dev_attr_hotkey_wakeup_hotunplug_complete =
2921         __ATTR(wakeup_hotunplug_complete, S_IRUGO,
2922                hotkey_wakeup_hotunplug_complete_show, NULL);
2923
2924 static void hotkey_wakeup_hotunplug_complete_notify_change(void)
2925 {
2926         sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2927                      "wakeup_hotunplug_complete");
2928 }
2929
2930 /* --------------------------------------------------------------------- */
2931
2932 static struct attribute *hotkey_attributes[] __initdata = {
2933         &dev_attr_hotkey_enable.attr,
2934         &dev_attr_hotkey_bios_enabled.attr,
2935         &dev_attr_hotkey_bios_mask.attr,
2936         &dev_attr_hotkey_report_mode.attr,
2937         &dev_attr_hotkey_wakeup_reason.attr,
2938         &dev_attr_hotkey_wakeup_hotunplug_complete.attr,
2939         &dev_attr_hotkey_mask.attr,
2940         &dev_attr_hotkey_all_mask.attr,
2941         &dev_attr_hotkey_recommended_mask.attr,
2942 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2943         &dev_attr_hotkey_source_mask.attr,
2944         &dev_attr_hotkey_poll_freq.attr,
2945 #endif
2946 };
2947
2948 /*
2949  * Sync both the hw and sw blocking state of all switches
2950  */
2951 static void tpacpi_send_radiosw_update(void)
2952 {
2953         int wlsw;
2954
2955         /*
2956          * We must sync all rfkill controllers *before* issuing any
2957          * rfkill input events, or we will race the rfkill core input
2958          * handler.
2959          *
2960          * tpacpi_inputdev_send_mutex works as a syncronization point
2961          * for the above.
2962          *
2963          * We optimize to avoid numerous calls to hotkey_get_wlsw.
2964          */
2965
2966         wlsw = hotkey_get_wlsw();
2967
2968         /* Sync hw blocking state first if it is hw-blocked */
2969         if (wlsw == TPACPI_RFK_RADIO_OFF)
2970                 tpacpi_rfk_update_hwblock_state(true);
2971
2972         /* Sync sw blocking state */
2973         tpacpi_rfk_update_swstate_all();
2974
2975         /* Sync hw blocking state last if it is hw-unblocked */
2976         if (wlsw == TPACPI_RFK_RADIO_ON)
2977                 tpacpi_rfk_update_hwblock_state(false);
2978
2979         /* Issue rfkill input event for WLSW switch */
2980         if (!(wlsw < 0)) {
2981                 mutex_lock(&tpacpi_inputdev_send_mutex);
2982
2983                 input_report_switch(tpacpi_inputdev,
2984                                     SW_RFKILL_ALL, (wlsw > 0));
2985                 input_sync(tpacpi_inputdev);
2986
2987                 mutex_unlock(&tpacpi_inputdev_send_mutex);
2988         }
2989
2990         /*
2991          * this can be unconditional, as we will poll state again
2992          * if userspace uses the notify to read data
2993          */
2994         hotkey_radio_sw_notify_change();
2995 }
2996
2997 static void hotkey_exit(void)
2998 {
2999 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
3000         mutex_lock(&hotkey_mutex);
3001         hotkey_poll_stop_sync();
3002         mutex_unlock(&hotkey_mutex);
3003 #endif
3004
3005         if (hotkey_dev_attributes)
3006                 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
3007
3008         kfree(hotkey_keycode_map);
3009
3010         dbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_HKEY,
3011                    "restoring original HKEY status and mask\n");
3012         /* yes, there is a bitwise or below, we want the
3013          * functions to be called even if one of them fail */
3014         if (((tp_features.hotkey_mask &&
3015               hotkey_mask_set(hotkey_orig_mask)) |
3016              hotkey_status_set(false)) != 0)
3017                 printk(TPACPI_ERR
3018                        "failed to restore hot key mask "
3019                        "to BIOS defaults\n");
3020 }
3021
3022 static void __init hotkey_unmap(const unsigned int scancode)
3023 {
3024         if (hotkey_keycode_map[scancode] != KEY_RESERVED) {
3025                 clear_bit(hotkey_keycode_map[scancode],
3026                           tpacpi_inputdev->keybit);
3027                 hotkey_keycode_map[scancode] = KEY_RESERVED;
3028         }
3029 }
3030
3031 /*
3032  * HKEY quirks:
3033  *   TPACPI_HK_Q_INIMASK:       Supports FN+F3,FN+F4,FN+F12
3034  */
3035
3036 #define TPACPI_HK_Q_INIMASK     0x0001
3037
3038 static const struct tpacpi_quirk tpacpi_hotkey_qtable[] __initconst = {
3039         TPACPI_Q_IBM('I', 'H', TPACPI_HK_Q_INIMASK), /* 600E */
3040         TPACPI_Q_IBM('I', 'N', TPACPI_HK_Q_INIMASK), /* 600E */
3041         TPACPI_Q_IBM('I', 'D', TPACPI_HK_Q_INIMASK), /* 770, 770E, 770ED */
3042         TPACPI_Q_IBM('I', 'W', TPACPI_HK_Q_INIMASK), /* A20m */
3043         TPACPI_Q_IBM('I', 'V', TPACPI_HK_Q_INIMASK), /* A20p */
3044         TPACPI_Q_IBM('1', '0', TPACPI_HK_Q_INIMASK), /* A21e, A22e */
3045         TPACPI_Q_IBM('K', 'U', TPACPI_HK_Q_INIMASK), /* A21e */
3046         TPACPI_Q_IBM('K', 'X', TPACPI_HK_Q_INIMASK), /* A21m, A22m */
3047         TPACPI_Q_IBM('K', 'Y', TPACPI_HK_Q_INIMASK), /* A21p, A22p */
3048         TPACPI_Q_IBM('1', 'B', TPACPI_HK_Q_INIMASK), /* A22e */
3049         TPACPI_Q_IBM('1', '3', TPACPI_HK_Q_INIMASK), /* A22m */
3050         TPACPI_Q_IBM('1', 'E', TPACPI_HK_Q_INIMASK), /* A30/p (0) */
3051         TPACPI_Q_IBM('1', 'C', TPACPI_HK_Q_INIMASK), /* R30 */
3052         TPACPI_Q_IBM('1', 'F', TPACPI_HK_Q_INIMASK), /* R31 */
3053         TPACPI_Q_IBM('I', 'Y', TPACPI_HK_Q_INIMASK), /* T20 */
3054         TPACPI_Q_IBM('K', 'Z', TPACPI_HK_Q_INIMASK), /* T21 */
3055         TPACPI_Q_IBM('1', '6', TPACPI_HK_Q_INIMASK), /* T22 */
3056         TPACPI_Q_IBM('I', 'Z', TPACPI_HK_Q_INIMASK), /* X20, X21 */
3057         TPACPI_Q_IBM('1', 'D', TPACPI_HK_Q_INIMASK), /* X22, X23, X24 */
3058 };
3059
3060 static int __init hotkey_init(struct ibm_init_struct *iibm)
3061 {
3062         /* Requirements for changing the default keymaps:
3063          *
3064          * 1. Many of the keys are mapped to KEY_RESERVED for very
3065          *    good reasons.  Do not change them unless you have deep
3066          *    knowledge on the IBM and Lenovo ThinkPad firmware for
3067          *    the various ThinkPad models.  The driver behaves
3068          *    differently for KEY_RESERVED: such keys have their
3069          *    hot key mask *unset* in mask_recommended, and also
3070          *    in the initial hot key mask programmed into the
3071          *    firmware at driver load time, which means the firm-
3072          *    ware may react very differently if you change them to
3073          *    something else;
3074          *
3075          * 2. You must be subscribed to the linux-thinkpad and
3076          *    ibm-acpi-devel mailing lists, and you should read the
3077          *    list archives since 2007 if you want to change the
3078          *    keymaps.  This requirement exists so that you will
3079          *    know the past history of problems with the thinkpad-
3080          *    acpi driver keymaps, and also that you will be
3081          *    listening to any bug reports;
3082          *
3083          * 3. Do not send thinkpad-acpi specific patches directly to
3084          *    for merging, *ever*.  Send them to the linux-acpi
3085          *    mailinglist for comments.  Merging is to be done only
3086          *    through acpi-test and the ACPI maintainer.
3087          *
3088          * If the above is too much to ask, don't change the keymap.
3089          * Ask the thinkpad-acpi maintainer to do it, instead.
3090          */
3091         static u16 ibm_keycode_map[] __initdata = {
3092                 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
3093                 KEY_FN_F1,      KEY_FN_F2,      KEY_COFFEE,     KEY_SLEEP,
3094                 KEY_WLAN,       KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
3095                 KEY_FN_F9,      KEY_FN_F10,     KEY_FN_F11,     KEY_SUSPEND,
3096
3097                 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
3098                 KEY_UNKNOWN,    /* 0x0C: FN+BACKSPACE */
3099                 KEY_UNKNOWN,    /* 0x0D: FN+INSERT */
3100                 KEY_UNKNOWN,    /* 0x0E: FN+DELETE */
3101
3102                 /* brightness: firmware always reacts to them */
3103                 KEY_RESERVED,   /* 0x0F: FN+HOME (brightness up) */
3104                 KEY_RESERVED,   /* 0x10: FN+END (brightness down) */
3105
3106                 /* Thinklight: firmware always react to it */
3107                 KEY_RESERVED,   /* 0x11: FN+PGUP (thinklight toggle) */
3108
3109                 KEY_UNKNOWN,    /* 0x12: FN+PGDOWN */
3110                 KEY_ZOOM,       /* 0x13: FN+SPACE (zoom) */
3111
3112                 /* Volume: firmware always react to it and reprograms
3113                  * the built-in *extra* mixer.  Never map it to control
3114                  * another mixer by default. */
3115                 KEY_RESERVED,   /* 0x14: VOLUME UP */
3116                 KEY_RESERVED,   /* 0x15: VOLUME DOWN */
3117                 KEY_RESERVED,   /* 0x16: MUTE */
3118
3119                 KEY_VENDOR,     /* 0x17: Thinkpad/AccessIBM/Lenovo */
3120
3121                 /* (assignments unknown, please report if found) */
3122                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3123                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3124         };
3125         static u16 lenovo_keycode_map[] __initdata = {
3126                 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
3127                 KEY_FN_F1,      KEY_COFFEE,     KEY_BATTERY,    KEY_SLEEP,
3128                 KEY_WLAN,       KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
3129                 KEY_FN_F9,      KEY_FN_F10,     KEY_FN_F11,     KEY_SUSPEND,
3130
3131                 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
3132                 KEY_UNKNOWN,    /* 0x0C: FN+BACKSPACE */
3133                 KEY_UNKNOWN,    /* 0x0D: FN+INSERT */
3134                 KEY_UNKNOWN,    /* 0x0E: FN+DELETE */
3135
3136                 /* These should be enabled --only-- when ACPI video
3137                  * is disabled (i.e. in "vendor" mode), and are handled
3138                  * in a special way by the init code */
3139                 KEY_BRIGHTNESSUP,       /* 0x0F: FN+HOME (brightness up) */
3140                 KEY_BRIGHTNESSDOWN,     /* 0x10: FN+END (brightness down) */
3141
3142                 KEY_RESERVED,   /* 0x11: FN+PGUP (thinklight toggle) */
3143
3144                 KEY_UNKNOWN,    /* 0x12: FN+PGDOWN */
3145                 KEY_ZOOM,       /* 0x13: FN+SPACE (zoom) */
3146
3147                 /* Volume: z60/z61, T60 (BIOS version?): firmware always
3148                  * react to it and reprograms the built-in *extra* mixer.
3149                  * Never map it to control another mixer by default.
3150                  *
3151                  * T60?, T61, R60?, R61: firmware and EC tries to send
3152                  * these over the regular keyboard, so these are no-ops,
3153                  * but there are still weird bugs re. MUTE, so do not
3154                  * change unless you get test reports from all Lenovo
3155                  * models.  May cause the BIOS to interfere with the
3156                  * HDA mixer.
3157                  */
3158                 KEY_RESERVED,   /* 0x14: VOLUME UP */
3159                 KEY_RESERVED,   /* 0x15: VOLUME DOWN */
3160                 KEY_RESERVED,   /* 0x16: MUTE */
3161
3162                 KEY_VENDOR,     /* 0x17: Thinkpad/AccessIBM/Lenovo */
3163
3164                 /* (assignments unknown, please report if found) */
3165                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3166                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3167         };
3168
3169 #define TPACPI_HOTKEY_MAP_LEN           ARRAY_SIZE(ibm_keycode_map)
3170 #define TPACPI_HOTKEY_MAP_SIZE          sizeof(ibm_keycode_map)
3171 #define TPACPI_HOTKEY_MAP_TYPESIZE      sizeof(ibm_keycode_map[0])
3172
3173         int res, i;
3174         int status;
3175         int hkeyv;
3176
3177         unsigned long quirks;
3178
3179         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3180                         "initializing hotkey subdriver\n");
3181
3182         BUG_ON(!tpacpi_inputdev);
3183         BUG_ON(tpacpi_inputdev->open != NULL ||
3184                tpacpi_inputdev->close != NULL);
3185
3186         TPACPI_ACPIHANDLE_INIT(hkey);
3187         mutex_init(&hotkey_mutex);
3188
3189 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
3190         mutex_init(&hotkey_thread_mutex);
3191         mutex_init(&hotkey_thread_data_mutex);
3192 #endif
3193
3194         /* hotkey not supported on 570 */
3195         tp_features.hotkey = hkey_handle != NULL;
3196
3197         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3198                 "hotkeys are %s\n",
3199                 str_supported(tp_features.hotkey));
3200
3201         if (!tp_features.hotkey)
3202                 return 1;
3203
3204         quirks = tpacpi_check_quirks(tpacpi_hotkey_qtable,
3205                                      ARRAY_SIZE(tpacpi_hotkey_qtable));
3206
3207         tpacpi_disable_brightness_delay();
3208
3209         /* MUST have enough space for all attributes to be added to
3210          * hotkey_dev_attributes */
3211         hotkey_dev_attributes = create_attr_set(
3212                                         ARRAY_SIZE(hotkey_attributes) + 2,
3213                                         NULL);
3214         if (!hotkey_dev_attributes)
3215                 return -ENOMEM;
3216         res = add_many_to_attr_set(hotkey_dev_attributes,
3217                         hotkey_attributes,
3218                         ARRAY_SIZE(hotkey_attributes));
3219         if (res)
3220                 goto err_exit;
3221
3222         /* mask not supported on 600e/x, 770e, 770x, A21e, A2xm/p,
3223            A30, R30, R31, T20-22, X20-21, X22-24.  Detected by checking
3224            for HKEY interface version 0x100 */
3225         if (acpi_evalf(hkey_handle, &hkeyv, "MHKV", "qd")) {
3226                 if ((hkeyv >> 8) != 1) {
3227                         printk(TPACPI_ERR "unknown version of the "
3228                                "HKEY interface: 0x%x\n", hkeyv);
3229                         printk(TPACPI_ERR "please report this to %s\n",
3230                                TPACPI_MAIL);
3231                 } else {
3232                         /*
3233                          * MHKV 0x100 in A31, R40, R40e,
3234                          * T4x, X31, and later
3235                          */
3236                         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3237                                 "firmware HKEY interface version: 0x%x\n",
3238                                 hkeyv);
3239
3240                         /* Paranoia check AND init hotkey_all_mask */
3241                         if (!acpi_evalf(hkey_handle, &hotkey_all_mask,
3242                                         "MHKA", "qd")) {
3243                                 printk(TPACPI_ERR
3244                                        "missing MHKA handler, "
3245                                        "please report this to %s\n",
3246                                        TPACPI_MAIL);
3247                                 /* Fallback: pre-init for FN+F3,F4,F12 */
3248                                 hotkey_all_mask = 0x080cU;
3249                         } else {
3250                                 tp_features.hotkey_mask = 1;
3251                         }
3252                 }
3253         }
3254
3255         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3256                 "hotkey masks are %s\n",
3257                 str_supported(tp_features.hotkey_mask));
3258
3259         /* Init hotkey_all_mask if not initialized yet */
3260         if (!tp_features.hotkey_mask && !hotkey_all_mask &&
3261             (quirks & TPACPI_HK_Q_INIMASK))
3262                 hotkey_all_mask = 0x080cU;  /* FN+F12, FN+F4, FN+F3 */
3263
3264         /* Init hotkey_acpi_mask and hotkey_orig_mask */
3265         if (tp_features.hotkey_mask) {
3266                 /* hotkey_source_mask *must* be zero for
3267                  * the first hotkey_mask_get to return hotkey_orig_mask */
3268                 res = hotkey_mask_get();
3269                 if (res)
3270                         goto err_exit;
3271
3272                 hotkey_orig_mask = hotkey_acpi_mask;
3273         } else {
3274                 hotkey_orig_mask = hotkey_all_mask;
3275                 hotkey_acpi_mask = hotkey_all_mask;
3276         }
3277
3278 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3279         if (dbg_wlswemul) {
3280                 tp_features.hotkey_wlsw = 1;
3281                 printk(TPACPI_INFO
3282                         "radio switch emulation enabled\n");
3283         } else
3284 #endif
3285         /* Not all thinkpads have a hardware radio switch */
3286         if (acpi_evalf(hkey_handle, &status, "WLSW", "qd")) {
3287                 tp_features.hotkey_wlsw = 1;
3288                 printk(TPACPI_INFO
3289                         "radio switch found; radios are %s\n",
3290                         enabled(status, 0));
3291         }
3292         if (tp_features.hotkey_wlsw)
3293                 res = add_to_attr_set(hotkey_dev_attributes,
3294                                 &dev_attr_hotkey_radio_sw.attr);
3295
3296         /* For X41t, X60t, X61t Tablets... */
3297         if (!res && acpi_evalf(hkey_handle, &status, "MHKG", "qd")) {
3298                 tp_features.hotkey_tablet = 1;
3299                 printk(TPACPI_INFO
3300                         "possible tablet mode switch found; "
3301                         "ThinkPad in %s mode\n",
3302                         (status & TP_HOTKEY_TABLET_MASK)?
3303                                 "tablet" : "laptop");
3304                 res = add_to_attr_set(hotkey_dev_attributes,
3305                                 &dev_attr_hotkey_tablet_mode.attr);
3306         }
3307
3308         if (!res)
3309                 res = register_attr_set_with_sysfs(
3310                                 hotkey_dev_attributes,
3311                                 &tpacpi_pdev->dev.kobj);
3312         if (res)
3313                 goto err_exit;
3314
3315         /* Set up key map */
3316
3317         hotkey_keycode_map = kmalloc(TPACPI_HOTKEY_MAP_SIZE,
3318                                         GFP_KERNEL);
3319         if (!hotkey_keycode_map) {
3320                 printk(TPACPI_ERR
3321                         "failed to allocate memory for key map\n");
3322                 res = -ENOMEM;
3323                 goto err_exit;
3324         }
3325
3326         if (thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO) {
3327                 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3328                            "using Lenovo default hot key map\n");
3329                 memcpy(hotkey_keycode_map, &lenovo_keycode_map,
3330                         TPACPI_HOTKEY_MAP_SIZE);
3331         } else {
3332                 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3333                            "using IBM default hot key map\n");
3334                 memcpy(hotkey_keycode_map, &ibm_keycode_map,
3335                         TPACPI_HOTKEY_MAP_SIZE);
3336         }
3337
3338         set_bit(EV_KEY, tpacpi_inputdev->evbit);
3339         set_bit(EV_MSC, tpacpi_inputdev->evbit);
3340         set_bit(MSC_SCAN, tpacpi_inputdev->mscbit);
3341         tpacpi_inputdev->keycodesize = TPACPI_HOTKEY_MAP_TYPESIZE;
3342         tpacpi_inputdev->keycodemax = TPACPI_HOTKEY_MAP_LEN;
3343         tpacpi_inputdev->keycode = hotkey_keycode_map;
3344         for (i = 0; i < TPACPI_HOTKEY_MAP_LEN; i++) {
3345                 if (hotkey_keycode_map[i] != KEY_RESERVED) {
3346                         set_bit(hotkey_keycode_map[i],
3347                                 tpacpi_inputdev->keybit);
3348                 } else {
3349                         if (i < sizeof(hotkey_reserved_mask)*8)
3350                                 hotkey_reserved_mask |= 1 << i;
3351                 }
3352         }
3353
3354         if (tp_features.hotkey_wlsw) {
3355                 set_bit(EV_SW, tpacpi_inputdev->evbit);
3356                 set_bit(SW_RFKILL_ALL, tpacpi_inputdev->swbit);
3357         }
3358         if (tp_features.hotkey_tablet) {
3359                 set_bit(EV_SW, tpacpi_inputdev->evbit);
3360                 set_bit(SW_TABLET_MODE, tpacpi_inputdev->swbit);
3361         }
3362
3363         /* Do not issue duplicate brightness change events to
3364          * userspace */
3365         if (!tp_features.bright_acpimode)
3366                 /* update bright_acpimode... */
3367                 tpacpi_check_std_acpi_brightness_support();
3368
3369         if (tp_features.bright_acpimode && acpi_video_backlight_support()) {
3370                 printk(TPACPI_INFO
3371                        "This ThinkPad has standard ACPI backlight "
3372                        "brightness control, supported by the ACPI "
3373                        "video driver\n");
3374                 printk(TPACPI_NOTICE
3375                        "Disabling thinkpad-acpi brightness events "
3376                        "by default...\n");
3377
3378                 /* Disable brightness up/down on Lenovo thinkpads when
3379                  * ACPI is handling them, otherwise it is plain impossible
3380                  * for userspace to do something even remotely sane */
3381                 hotkey_reserved_mask |=
3382                         (1 << TP_ACPI_HOTKEYSCAN_FNHOME)
3383                         | (1 << TP_ACPI_HOTKEYSCAN_FNEND);
3384                 hotkey_unmap(TP_ACPI_HOTKEYSCAN_FNHOME);
3385                 hotkey_unmap(TP_ACPI_HOTKEYSCAN_FNEND);
3386         }
3387
3388 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
3389         hotkey_source_mask = TPACPI_HKEY_NVRAM_GOOD_MASK
3390                                 & ~hotkey_all_mask
3391                                 & ~hotkey_reserved_mask;
3392
3393         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3394                     "hotkey source mask 0x%08x, polling freq %u\n",
3395                     hotkey_source_mask, hotkey_poll_freq);
3396 #endif
3397
3398         dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3399                         "enabling firmware HKEY event interface...\n");
3400         res = hotkey_status_set(true);
3401         if (res) {
3402                 hotkey_exit();
3403                 return res;
3404         }
3405         res = hotkey_mask_set(((hotkey_all_mask & ~hotkey_reserved_mask)
3406                                | hotkey_driver_mask)
3407                               & ~hotkey_source_mask);
3408         if (res < 0 && res != -ENXIO) {
3409                 hotkey_exit();
3410                 return res;
3411         }
3412         hotkey_user_mask = (hotkey_acpi_mask | hotkey_source_mask)
3413                                 & ~hotkey_reserved_mask;
3414         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3415                 "initial masks: user=0x%08x, fw=0x%08x, poll=0x%08x\n",
3416                 hotkey_user_mask, hotkey_acpi_mask, hotkey_source_mask);
3417
3418         dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3419                         "legacy ibm/hotkey event reporting over procfs %s\n",
3420                         (hotkey_report_mode < 2) ?
3421                                 "enabled" : "disabled");
3422
3423         tpacpi_inputdev->open = &hotkey_inputdev_open;
3424         tpacpi_inputdev->close = &hotkey_inputdev_close;
3425
3426         hotkey_poll_setup_safe(true);
3427         tpacpi_send_radiosw_update();
3428         tpacpi_input_send_tabletsw();
3429
3430         return 0;
3431
3432 err_exit:
3433         delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
3434         hotkey_dev_attributes = NULL;
3435
3436         return (res < 0)? res : 1;
3437 }
3438
3439 static bool hotkey_notify_hotkey(const u32 hkey,
3440                                  bool *send_acpi_ev,
3441                                  bool *ignore_acpi_ev)
3442 {
3443         /* 0x1000-0x1FFF: key presses */
3444         unsigned int scancode = hkey & 0xfff;
3445         *send_acpi_ev = true;
3446         *ignore_acpi_ev = false;
3447
3448         if (scancode > 0 && scancode < 0x21) {
3449                 scancode--;
3450                 if (!(hotkey_source_mask & (1 << scancode))) {
3451                         tpacpi_input_send_key_masked(scancode);
3452                         *send_acpi_ev = false;
3453                 } else {
3454                         *ignore_acpi_ev = true;
3455                 }
3456                 return true;
3457         }
3458         return false;
3459 }
3460
3461 static bool hotkey_notify_wakeup(const u32 hkey,
3462                                  bool *send_acpi_ev,
3463                                  bool *ignore_acpi_ev)
3464 {
3465         /* 0x2000-0x2FFF: Wakeup reason */
3466         *send_acpi_ev = true;
3467         *ignore_acpi_ev = false;
3468
3469         switch (hkey) {
3470         case TP_HKEY_EV_WKUP_S3_UNDOCK: /* suspend, undock */
3471         case TP_HKEY_EV_WKUP_S4_UNDOCK: /* hibernation, undock */
3472                 hotkey_wakeup_reason = TP_ACPI_WAKEUP_UNDOCK;
3473                 *ignore_acpi_ev = true;
3474                 break;
3475
3476         case TP_HKEY_EV_WKUP_S3_BAYEJ: /* suspend, bay eject */
3477         case TP_HKEY_EV_WKUP_S4_BAYEJ: /* hibernation, bay eject */
3478                 hotkey_wakeup_reason = TP_ACPI_WAKEUP_BAYEJ;
3479                 *ignore_acpi_ev = true;
3480                 break;
3481
3482         case TP_HKEY_EV_WKUP_S3_BATLOW: /* Battery on critical low level/S3 */
3483         case TP_HKEY_EV_WKUP_S4_BATLOW: /* Battery on critical low level/S4 */
3484                 printk(TPACPI_ALERT
3485                         "EMERGENCY WAKEUP: battery almost empty\n");
3486                 /* how to auto-heal: */
3487                 /* 2313: woke up from S3, go to S4/S5 */
3488                 /* 2413: woke up from S4, go to S5 */
3489                 break;
3490
3491         default:
3492                 return false;
3493         }
3494
3495         if (hotkey_wakeup_reason != TP_ACPI_WAKEUP_NONE) {
3496                 printk(TPACPI_INFO
3497                        "woke up due to a hot-unplug "
3498                        "request...\n");
3499                 hotkey_wakeup_reason_notify_change();
3500         }
3501         return true;
3502 }
3503
3504 static bool hotkey_notify_usrevent(const u32 hkey,
3505                                  bool *send_acpi_ev,
3506                                  bool *ignore_acpi_ev)
3507 {
3508         /* 0x5000-0x5FFF: human interface helpers */
3509         *send_acpi_ev = true;
3510         *ignore_acpi_ev = false;
3511
3512         switch (hkey) {
3513         case TP_HKEY_EV_PEN_INSERTED:  /* X61t: tablet pen inserted into bay */
3514         case TP_HKEY_EV_PEN_REMOVED:   /* X61t: tablet pen removed from bay */
3515                 return true;
3516
3517         case TP_HKEY_EV_TABLET_TABLET:   /* X41t-X61t: tablet mode */
3518         case TP_HKEY_EV_TABLET_NOTEBOOK: /* X41t-X61t: normal mode */
3519                 tpacpi_input_send_tabletsw();
3520                 hotkey_tablet_mode_notify_change();
3521                 *send_acpi_ev = false;
3522                 return true;
3523
3524         case TP_HKEY_EV_LID_CLOSE:      /* Lid closed */
3525         case TP_HKEY_EV_LID_OPEN:       /* Lid opened */
3526         case TP_HKEY_EV_BRGHT_CHANGED:  /* brightness changed */
3527                 /* do not propagate these events */
3528                 *ignore_acpi_ev = true;
3529                 return true;
3530
3531         default:
3532                 return false;
3533         }
3534 }
3535
3536 static bool hotkey_notify_thermal(const u32 hkey,
3537                                  bool *send_acpi_ev,
3538                                  bool *ignore_acpi_ev)
3539 {
3540         /* 0x6000-0x6FFF: thermal alarms */
3541         *send_acpi_ev = true;
3542         *ignore_acpi_ev = false;
3543
3544         switch (hkey) {
3545         case TP_HKEY_EV_ALARM_BAT_HOT:
3546                 printk(TPACPI_CRIT
3547                         "THERMAL ALARM: battery is too hot!\n");
3548                 /* recommended action: warn user through gui */
3549                 return true;
3550         case TP_HKEY_EV_ALARM_BAT_XHOT:
3551                 printk(TPACPI_ALERT
3552                         "THERMAL EMERGENCY: battery is extremely hot!\n");
3553                 /* recommended action: immediate sleep/hibernate */
3554                 return true;
3555         case TP_HKEY_EV_ALARM_SENSOR_HOT:
3556                 printk(TPACPI_CRIT
3557                         "THERMAL ALARM: "
3558                         "a sensor reports something is too hot!\n");
3559                 /* recommended action: warn user through gui, that */
3560                 /* some internal component is too hot */
3561                 return true;
3562         case TP_HKEY_EV_ALARM_SENSOR_XHOT:
3563                 printk(TPACPI_ALERT
3564                         "THERMAL EMERGENCY: "
3565                         "a sensor reports something is extremely hot!\n");
3566                 /* recommended action: immediate sleep/hibernate */
3567                 return true;
3568         case TP_HKEY_EV_THM_TABLE_CHANGED:
3569                 printk(TPACPI_INFO
3570                         "EC reports that Thermal Table has changed\n");
3571                 /* recommended action: do nothing, we don't have
3572                  * Lenovo ATM information */
3573                 return true;
3574         default:
3575                 printk(TPACPI_ALERT
3576                          "THERMAL ALERT: unknown thermal alarm received\n");
3577                 return false;
3578         }
3579 }
3580
3581 static void hotkey_notify(struct ibm_struct *ibm, u32 event)
3582 {
3583         u32 hkey;
3584         bool send_acpi_ev;
3585         bool ignore_acpi_ev;
3586         bool known_ev;
3587
3588         if (event != 0x80) {
3589                 printk(TPACPI_ERR
3590                        "unknown HKEY notification event %d\n", event);
3591                 /* forward it to userspace, maybe it knows how to handle it */
3592                 acpi_bus_generate_netlink_event(
3593                                         ibm->acpi->device->pnp.device_class,
3594                                         dev_name(&ibm->acpi->device->dev),
3595                                         event, 0);
3596                 return;
3597         }
3598
3599         while (1) {
3600                 if (!acpi_evalf(hkey_handle, &hkey, "MHKP", "d")) {
3601                         printk(TPACPI_ERR "failed to retrieve HKEY event\n");
3602                         return;
3603                 }
3604
3605                 if (hkey == 0) {
3606                         /* queue empty */
3607                         return;
3608                 }
3609
3610                 send_acpi_ev = true;
3611                 ignore_acpi_ev = false;
3612
3613                 switch (hkey >> 12) {
3614                 case 1:
3615                         /* 0x1000-0x1FFF: key presses */
3616                         known_ev = hotkey_notify_hotkey(hkey, &send_acpi_ev,
3617                                                  &ignore_acpi_ev);
3618                         break;
3619                 case 2:
3620                         /* 0x2000-0x2FFF: Wakeup reason */
3621                         known_ev = hotkey_notify_wakeup(hkey, &send_acpi_ev,
3622                                                  &ignore_acpi_ev);
3623                         break;
3624                 case 3:
3625                         /* 0x3000-0x3FFF: bay-related wakeups */
3626                         if (hkey == TP_HKEY_EV_BAYEJ_ACK) {
3627                                 hotkey_autosleep_ack = 1;
3628                                 printk(TPACPI_INFO
3629                                        "bay ejected\n");
3630                                 hotkey_wakeup_hotunplug_complete_notify_change();
3631                                 known_ev = true;
3632                         } else {
3633                                 known_ev = false;
3634                         }
3635                         break;
3636                 case 4:
3637                         /* 0x4000-0x4FFF: dock-related wakeups */
3638                         if (hkey == TP_HKEY_EV_UNDOCK_ACK) {
3639                                 hotkey_autosleep_ack = 1;
3640                                 printk(TPACPI_INFO
3641                                        "undocked\n");
3642                                 hotkey_wakeup_hotunplug_complete_notify_change();
3643                                 known_ev = true;
3644                         } else {
3645                                 known_ev = false;
3646                         }
3647                         break;
3648                 case 5:
3649                         /* 0x5000-0x5FFF: human interface helpers */
3650                         known_ev = hotkey_notify_usrevent(hkey, &send_acpi_ev,
3651                                                  &ignore_acpi_ev);
3652                         break;
3653                 case 6:
3654                         /* 0x6000-0x6FFF: thermal alarms */
3655                         known_ev = hotkey_notify_thermal(hkey, &send_acpi_ev,
3656                                                  &ignore_acpi_ev);
3657                         break;
3658                 case 7:
3659                         /* 0x7000-0x7FFF: misc */
3660                         if (tp_features.hotkey_wlsw &&
3661                                         hkey == TP_HKEY_EV_RFKILL_CHANGED) {
3662                                 tpacpi_send_radiosw_update();
3663                                 send_acpi_ev = 0;
3664                                 known_ev = true;
3665                                 break;
3666                         }
3667                         /* fallthrough to default */
3668                 default:
3669                         known_ev = false;
3670                 }
3671                 if (!known_ev) {
3672                         printk(TPACPI_NOTICE
3673                                "unhandled HKEY event 0x%04x\n", hkey);
3674                         printk(TPACPI_NOTICE
3675                                "please report the conditions when this "
3676                                "event happened to %s\n", TPACPI_MAIL);
3677                 }
3678
3679                 /* Legacy events */
3680                 if (!ignore_acpi_ev &&
3681                     (send_acpi_ev || hotkey_report_mode < 2)) {
3682                         acpi_bus_generate_proc_event(ibm->acpi->device,
3683                                                      event, hkey);
3684                 }
3685
3686                 /* netlink events */
3687                 if (!ignore_acpi_ev && send_acpi_ev) {
3688                         acpi_bus_generate_netlink_event(
3689                                         ibm->acpi->device->pnp.device_class,
3690                                         dev_name(&ibm->acpi->device->dev),
3691                                         event, hkey);
3692                 }
3693         }
3694 }
3695
3696 static void hotkey_suspend(pm_message_t state)
3697 {
3698         /* Do these on suspend, we get the events on early resume! */
3699         hotkey_wakeup_reason = TP_ACPI_WAKEUP_NONE;
3700         hotkey_autosleep_ack = 0;
3701 }
3702
3703 static void hotkey_resume(void)
3704 {
3705         tpacpi_disable_brightness_delay();
3706
3707         if (hotkey_status_set(true) < 0 ||
3708             hotkey_mask_set(hotkey_acpi_mask) < 0)
3709                 printk(TPACPI_ERR
3710                        "error while attempting to reset the event "
3711                        "firmware interface\n");
3712
3713         tpacpi_send_radiosw_update();
3714         hotkey_tablet_mode_notify_change();
3715         hotkey_wakeup_reason_notify_change();
3716         hotkey_wakeup_hotunplug_complete_notify_change();
3717         hotkey_poll_setup_safe(false);
3718 }
3719
3720 /* procfs -------------------------------------------------------------- */
3721 static int hotkey_read(char *p)
3722 {
3723         int res, status;
3724         int len = 0;
3725
3726         if (!tp_features.hotkey) {
3727                 len += sprintf(p + len, "status:\t\tnot supported\n");
3728                 return len;
3729         }
3730
3731         if (mutex_lock_killable(&hotkey_mutex))
3732                 return -ERESTARTSYS;
3733         res = hotkey_status_get(&status);
3734         if (!res)
3735                 res = hotkey_mask_get();
3736         mutex_unlock(&hotkey_mutex);
3737         if (res)
3738                 return res;
3739
3740         len += sprintf(p + len, "status:\t\t%s\n", enabled(status, 0));
3741         if (hotkey_all_mask) {
3742                 len += sprintf(p + len, "mask:\t\t0x%08x\n", hotkey_user_mask);
3743                 len += sprintf(p + len,
3744                                "commands:\tenable, disable, reset, <mask>\n");
3745         } else {
3746                 len += sprintf(p + len, "mask:\t\tnot supported\n");
3747                 len += sprintf(p + len, "commands:\tenable, disable, reset\n");
3748         }
3749
3750         return len;
3751 }
3752
3753 static void hotkey_enabledisable_warn(bool enable)
3754 {
3755         tpacpi_log_usertask("procfs hotkey enable/disable");
3756         if (!WARN((tpacpi_lifecycle == TPACPI_LIFE_RUNNING || !enable),
3757                         TPACPI_WARN
3758                         "hotkey enable/disable functionality has been "
3759                         "removed from the driver.  Hotkeys are always "
3760                         "enabled\n"))
3761                 printk(TPACPI_ERR
3762                         "Please remove the hotkey=enable module "
3763                         "parameter, it is deprecated.  Hotkeys are always "
3764                         "enabled\n");
3765 }
3766
3767 static int hotkey_write(char *buf)
3768 {
3769         int res;
3770         u32 mask;
3771         char *cmd;
3772
3773         if (!tp_features.hotkey)
3774                 return -ENODEV;
3775
3776         if (mutex_lock_killable(&hotkey_mutex))
3777                 return -ERESTARTSYS;
3778
3779         mask = hotkey_user_mask;
3780
3781         res = 0;
3782         while ((cmd = next_cmd(&buf))) {
3783                 if (strlencmp(cmd, "enable") == 0) {
3784                         hotkey_enabledisable_warn(1);
3785                 } else if (strlencmp(cmd, "disable") == 0) {
3786                         hotkey_enabledisable_warn(0);
3787                         res = -EPERM;
3788                 } else if (strlencmp(cmd, "reset") == 0) {
3789                         mask = (hotkey_all_mask | hotkey_source_mask)
3790                                 & ~hotkey_reserved_mask;
3791                 } else if (sscanf(cmd, "0x%x", &mask) == 1) {
3792                         /* mask set */
3793                 } else if (sscanf(cmd, "%x", &mask) == 1) {
3794                         /* mask set */
3795                 } else {
3796                         res = -EINVAL;
3797                         goto errexit;
3798                 }
3799         }
3800
3801         if (!res) {
3802                 tpacpi_disclose_usertask("procfs hotkey",
3803                         "set mask to 0x%08x\n", mask);
3804                 res = hotkey_user_mask_set(mask);
3805         }
3806
3807 errexit:
3808         mutex_unlock(&hotkey_mutex);
3809         return res;
3810 }
3811
3812 static const struct acpi_device_id ibm_htk_device_ids[] = {
3813         {TPACPI_ACPI_HKEY_HID, 0},
3814         {"", 0},
3815 };
3816
3817 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver = {
3818         .hid = ibm_htk_device_ids,
3819         .notify = hotkey_notify,
3820         .handle = &hkey_handle,
3821         .type = ACPI_DEVICE_NOTIFY,
3822 };
3823
3824 static struct ibm_struct hotkey_driver_data = {
3825         .name = "hotkey",
3826         .read = hotkey_read,
3827         .write = hotkey_write,
3828         .exit = hotkey_exit,
3829         .resume = hotkey_resume,
3830         .suspend = hotkey_suspend,
3831         .acpi = &ibm_hotkey_acpidriver,
3832 };
3833
3834 /*************************************************************************
3835  * Bluetooth subdriver
3836  */
3837
3838 enum {
3839         /* ACPI GBDC/SBDC bits */
3840         TP_ACPI_BLUETOOTH_HWPRESENT     = 0x01, /* Bluetooth hw available */
3841         TP_ACPI_BLUETOOTH_RADIOSSW      = 0x02, /* Bluetooth radio enabled */
3842         TP_ACPI_BLUETOOTH_RESUMECTRL    = 0x04, /* Bluetooth state at resume:
3843                                                    off / last state */
3844 };
3845
3846 enum {
3847         /* ACPI \BLTH commands */
3848         TP_ACPI_BLTH_GET_ULTRAPORT_ID   = 0x00, /* Get Ultraport BT ID */
3849         TP_ACPI_BLTH_GET_PWR_ON_RESUME  = 0x01, /* Get power-on-resume state */
3850         TP_ACPI_BLTH_PWR_ON_ON_RESUME   = 0x02, /* Resume powered on */
3851         TP_ACPI_BLTH_PWR_OFF_ON_RESUME  = 0x03, /* Resume powered off */
3852         TP_ACPI_BLTH_SAVE_STATE         = 0x05, /* Save state for S4/S5 */
3853 };
3854
3855 #define TPACPI_RFK_BLUETOOTH_SW_NAME    "tpacpi_bluetooth_sw"
3856
3857 static void bluetooth_suspend(pm_message_t state)
3858 {
3859         /* Try to make sure radio will resume powered off */
3860         if (!acpi_evalf(NULL, NULL, "\\BLTH", "vd",
3861                    TP_ACPI_BLTH_PWR_OFF_ON_RESUME))
3862                 vdbg_printk(TPACPI_DBG_RFKILL,
3863                         "bluetooth power down on resume request failed\n");
3864 }
3865
3866 static int bluetooth_get_status(void)
3867 {
3868         int status;
3869
3870 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3871         if (dbg_bluetoothemul)
3872                 return (tpacpi_bluetooth_emulstate) ?
3873                        TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
3874 #endif
3875
3876         if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
3877                 return -EIO;
3878
3879         return ((status & TP_ACPI_BLUETOOTH_RADIOSSW) != 0) ?
3880                         TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
3881 }
3882
3883 static int bluetooth_set_status(enum tpacpi_rfkill_state state)
3884 {
3885         int status;
3886
3887         vdbg_printk(TPACPI_DBG_RFKILL,
3888                 "will attempt to %s bluetooth\n",
3889                 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable");
3890
3891 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3892         if (dbg_bluetoothemul) {
3893                 tpacpi_bluetooth_emulstate = (state == TPACPI_RFK_RADIO_ON);
3894                 return 0;
3895         }
3896 #endif
3897
3898         /* We make sure to keep TP_ACPI_BLUETOOTH_RESUMECTRL off */
3899         if (state == TPACPI_RFK_RADIO_ON)
3900                 status = TP_ACPI_BLUETOOTH_RADIOSSW;
3901         else
3902                 status = 0;
3903
3904         if (!acpi_evalf(hkey_handle, NULL, "SBDC", "vd", status))
3905                 return -EIO;
3906
3907         return 0;
3908 }
3909
3910 /* sysfs bluetooth enable ---------------------------------------------- */
3911 static ssize_t bluetooth_enable_show(struct device *dev,
3912                            struct device_attribute *attr,
3913                            char *buf)
3914 {
3915         return tpacpi_rfk_sysfs_enable_show(TPACPI_RFK_BLUETOOTH_SW_ID,
3916                         attr, buf);
3917 }
3918
3919 static ssize_t bluetooth_enable_store(struct device *dev,
3920                             struct device_attribute *attr,
3921                             const char *buf, size_t count)
3922 {
3923         return tpacpi_rfk_sysfs_enable_store(TPACPI_RFK_BLUETOOTH_SW_ID,
3924                                 attr, buf, count);
3925 }
3926
3927 static struct device_attribute dev_attr_bluetooth_enable =
3928         __ATTR(bluetooth_enable, S_IWUSR | S_IRUGO,
3929                 bluetooth_enable_show, bluetooth_enable_store);
3930
3931 /* --------------------------------------------------------------------- */
3932
3933 static struct attribute *bluetooth_attributes[] = {
3934         &dev_attr_bluetooth_enable.attr,
3935         NULL
3936 };
3937
3938 static const struct attribute_group bluetooth_attr_group = {
3939         .attrs = bluetooth_attributes,
3940 };
3941
3942 static const struct tpacpi_rfk_ops bluetooth_tprfk_ops = {
3943         .get_status = bluetooth_get_status,
3944         .set_status = bluetooth_set_status,
3945 };
3946
3947 static void bluetooth_shutdown(void)
3948 {
3949         /* Order firmware to save current state to NVRAM */
3950         if (!acpi_evalf(NULL, NULL, "\\BLTH", "vd",
3951                         TP_ACPI_BLTH_SAVE_STATE))
3952                 printk(TPACPI_NOTICE
3953                         "failed to save bluetooth state to NVRAM\n");
3954         else
3955                 vdbg_printk(TPACPI_DBG_RFKILL,
3956                         "bluestooth state saved to NVRAM\n");
3957 }
3958
3959 static void bluetooth_exit(void)
3960 {
3961         sysfs_remove_group(&tpacpi_pdev->dev.kobj,
3962                         &bluetooth_attr_group);
3963
3964         tpacpi_destroy_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID);
3965
3966         bluetooth_shutdown();
3967 }
3968
3969 static int __init bluetooth_init(struct ibm_init_struct *iibm)
3970 {
3971         int res;
3972         int status = 0;
3973
3974         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
3975                         "initializing bluetooth subdriver\n");
3976
3977         TPACPI_ACPIHANDLE_INIT(hkey);
3978
3979         /* bluetooth not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
3980            G4x, R30, R31, R40e, R50e, T20-22, X20-21 */
3981         tp_features.bluetooth = hkey_handle &&
3982             acpi_evalf(hkey_handle, &status, "GBDC", "qd");
3983
3984         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
3985                 "bluetooth is %s, status 0x%02x\n",
3986                 str_supported(tp_features.bluetooth),
3987                 status);
3988
3989 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3990         if (dbg_bluetoothemul) {
3991                 tp_features.bluetooth = 1;
3992                 printk(TPACPI_INFO
3993                         "bluetooth switch emulation enabled\n");
3994         } else
3995 #endif
3996         if (tp_features.bluetooth &&
3997             !(status & TP_ACPI_BLUETOOTH_HWPRESENT)) {
3998                 /* no bluetooth hardware present in system */
3999                 tp_features.bluetooth = 0;
4000                 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4001                            "bluetooth hardware not installed\n");
4002         }
4003
4004         if (!tp_features.bluetooth)
4005                 return 1;
4006
4007         res = tpacpi_new_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID,
4008                                 &bluetooth_tprfk_ops,
4009                                 RFKILL_TYPE_BLUETOOTH,
4010                                 TPACPI_RFK_BLUETOOTH_SW_NAME,
4011                                 true);
4012         if (res)
4013                 return res;
4014
4015         res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
4016                                 &bluetooth_attr_group);
4017         if (res) {
4018                 tpacpi_destroy_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID);
4019                 return res;
4020         }
4021
4022         return 0;
4023 }
4024
4025 /* procfs -------------------------------------------------------------- */
4026 static int bluetooth_read(char *p)
4027 {
4028         return tpacpi_rfk_procfs_read(TPACPI_RFK_BLUETOOTH_SW_ID, p);
4029 }
4030
4031 static int bluetooth_write(char *buf)
4032 {
4033         return tpacpi_rfk_procfs_write(TPACPI_RFK_BLUETOOTH_SW_ID, buf);
4034 }
4035
4036 static struct ibm_struct bluetooth_driver_data = {
4037         .name = "bluetooth",
4038         .read = bluetooth_read,
4039         .write = bluetooth_write,
4040         .exit = bluetooth_exit,
4041         .suspend = bluetooth_suspend,
4042         .shutdown = bluetooth_shutdown,
4043 };
4044
4045 /*************************************************************************
4046  * Wan subdriver
4047  */
4048
4049 enum {
4050         /* ACPI GWAN/SWAN bits */
4051         TP_ACPI_WANCARD_HWPRESENT       = 0x01, /* Wan hw available */
4052         TP_ACPI_WANCARD_RADIOSSW        = 0x02, /* Wan radio enabled */
4053         TP_ACPI_WANCARD_RESUMECTRL      = 0x04, /* Wan state at resume:
4054                                                    off / last state */
4055 };
4056
4057 #define TPACPI_RFK_WWAN_SW_NAME         "tpacpi_wwan_sw"
4058
4059 static void wan_suspend(pm_message_t state)
4060 {
4061         /* Try to make sure radio will resume powered off */
4062         if (!acpi_evalf(NULL, NULL, "\\WGSV", "qvd",
4063                    TP_ACPI_WGSV_PWR_OFF_ON_RESUME))
4064                 vdbg_printk(TPACPI_DBG_RFKILL,
4065                         "WWAN power down on resume request failed\n");
4066 }
4067
4068 static int wan_get_status(void)
4069 {
4070         int status;
4071
4072 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4073         if (dbg_wwanemul)
4074                 return (tpacpi_wwan_emulstate) ?
4075                        TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4076 #endif
4077
4078         if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
4079                 return -EIO;
4080
4081         return ((status & TP_ACPI_WANCARD_RADIOSSW) != 0) ?
4082                         TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4083 }
4084
4085 static int wan_set_status(enum tpacpi_rfkill_state state)
4086 {
4087         int status;
4088
4089         vdbg_printk(TPACPI_DBG_RFKILL,
4090                 "will attempt to %s wwan\n",
4091                 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable");
4092
4093 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4094         if (dbg_wwanemul) {
4095                 tpacpi_wwan_emulstate = (state == TPACPI_RFK_RADIO_ON);
4096                 return 0;
4097         }
4098 #endif
4099
4100         /* We make sure to keep TP_ACPI_WANCARD_RESUMECTRL off */
4101         if (state == TPACPI_RFK_RADIO_ON)
4102                 status = TP_ACPI_WANCARD_RADIOSSW;
4103         else
4104                 status = 0;
4105
4106         if (!acpi_evalf(hkey_handle, NULL, "SWAN", "vd", status))
4107                 return -EIO;
4108
4109         return 0;
4110 }
4111
4112 /* sysfs wan enable ---------------------------------------------------- */
4113 static ssize_t wan_enable_show(struct device *dev,
4114                            struct device_attribute *attr,
4115                            char *buf)
4116 {
4117         return tpacpi_rfk_sysfs_enable_show(TPACPI_RFK_WWAN_SW_ID,
4118                         attr, buf);
4119 }
4120
4121 static ssize_t wan_enable_store(struct device *dev,
4122                             struct device_attribute *attr,
4123                             const char *buf, size_t count)
4124 {
4125         return tpacpi_rfk_sysfs_enable_store(TPACPI_RFK_WWAN_SW_ID,
4126                         attr, buf, count);
4127 }
4128
4129 static struct device_attribute dev_attr_wan_enable =
4130         __ATTR(wwan_enable, S_IWUSR | S_IRUGO,
4131                 wan_enable_show, wan_enable_store);
4132
4133 /* --------------------------------------------------------------------- */
4134
4135 static struct attribute *wan_attributes[] = {
4136         &dev_attr_wan_enable.attr,
4137         NULL
4138 };
4139
4140 static const struct attribute_group wan_attr_group = {
4141         .attrs = wan_attributes,
4142 };
4143
4144 static const struct tpacpi_rfk_ops wan_tprfk_ops = {
4145         .get_status = wan_get_status,
4146         .set_status = wan_set_status,
4147 };
4148
4149 static void wan_shutdown(void)
4150 {
4151         /* Order firmware to save current state to NVRAM */
4152         if (!acpi_evalf(NULL, NULL, "\\WGSV", "vd",
4153                         TP_ACPI_WGSV_SAVE_STATE))
4154                 printk(TPACPI_NOTICE
4155                         "failed to save WWAN state to NVRAM\n");
4156         else
4157                 vdbg_printk(TPACPI_DBG_RFKILL,
4158                         "WWAN state saved to NVRAM\n");
4159 }
4160
4161 static void wan_exit(void)
4162 {
4163         sysfs_remove_group(&tpacpi_pdev->dev.kobj,
4164                 &wan_attr_group);
4165
4166         tpacpi_destroy_rfkill(TPACPI_RFK_WWAN_SW_ID);
4167
4168         wan_shutdown();
4169 }
4170
4171 static int __init wan_init(struct ibm_init_struct *iibm)
4172 {
4173         int res;
4174         int status = 0;
4175
4176         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4177                         "initializing wan subdriver\n");
4178
4179         TPACPI_ACPIHANDLE_INIT(hkey);
4180
4181         tp_features.wan = hkey_handle &&
4182             acpi_evalf(hkey_handle, &status, "GWAN", "qd");
4183
4184         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4185                 "wan is %s, status 0x%02x\n",
4186                 str_supported(tp_features.wan),
4187                 status);
4188
4189 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4190         if (dbg_wwanemul) {
4191                 tp_features.wan = 1;
4192                 printk(TPACPI_INFO
4193                         "wwan switch emulation enabled\n");
4194         } else
4195 #endif
4196         if (tp_features.wan &&
4197             !(status & TP_ACPI_WANCARD_HWPRESENT)) {
4198                 /* no wan hardware present in system */
4199                 tp_features.wan = 0;
4200                 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4201                            "wan hardware not installed\n");
4202         }
4203
4204         if (!tp_features.wan)
4205                 return 1;
4206
4207         res = tpacpi_new_rfkill(TPACPI_RFK_WWAN_SW_ID,
4208                                 &wan_tprfk_ops,
4209                                 RFKILL_TYPE_WWAN,
4210                                 TPACPI_RFK_WWAN_SW_NAME,
4211                                 true);
4212         if (res)
4213                 return res;
4214
4215         res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
4216                                 &wan_attr_group);
4217
4218         if (res) {
4219                 tpacpi_destroy_rfkill(TPACPI_RFK_WWAN_SW_ID);
4220                 return res;
4221         }
4222
4223         return 0;
4224 }
4225
4226 /* procfs -------------------------------------------------------------- */
4227 static int wan_read(char *p)
4228 {
4229         return tpacpi_rfk_procfs_read(TPACPI_RFK_WWAN_SW_ID, p);
4230 }
4231
4232 static int wan_write(char *buf)
4233 {
4234         return tpacpi_rfk_procfs_write(TPACPI_RFK_WWAN_SW_ID, buf);
4235 }
4236
4237 static struct ibm_struct wan_driver_data = {
4238         .name = "wan",
4239         .read = wan_read,
4240         .write = wan_write,
4241         .exit = wan_exit,
4242         .suspend = wan_suspend,
4243         .shutdown = wan_shutdown,
4244 };
4245
4246 /*************************************************************************
4247  * UWB subdriver
4248  */
4249
4250 enum {
4251         /* ACPI GUWB/SUWB bits */
4252         TP_ACPI_UWB_HWPRESENT   = 0x01, /* UWB hw available */
4253         TP_ACPI_UWB_RADIOSSW    = 0x02, /* UWB radio enabled */
4254 };
4255
4256 #define TPACPI_RFK_UWB_SW_NAME  "tpacpi_uwb_sw"
4257
4258 static int uwb_get_status(void)
4259 {
4260         int status;
4261
4262 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4263         if (dbg_uwbemul)
4264                 return (tpacpi_uwb_emulstate) ?
4265                        TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4266 #endif
4267
4268         if (!acpi_evalf(hkey_handle, &status, "GUWB", "d"))
4269                 return -EIO;
4270
4271         return ((status & TP_ACPI_UWB_RADIOSSW) != 0) ?
4272                         TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4273 }
4274
4275 static int uwb_set_status(enum tpacpi_rfkill_state state)
4276 {
4277         int status;
4278
4279         vdbg_printk(TPACPI_DBG_RFKILL,
4280                 "will attempt to %s UWB\n",
4281                 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable");
4282
4283 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4284         if (dbg_uwbemul) {
4285                 tpacpi_uwb_emulstate = (state == TPACPI_RFK_RADIO_ON);
4286                 return 0;
4287         }
4288 #endif
4289
4290         if (state == TPACPI_RFK_RADIO_ON)
4291                 status = TP_ACPI_UWB_RADIOSSW;
4292         else
4293                 status = 0;
4294
4295         if (!acpi_evalf(hkey_handle, NULL, "SUWB", "vd", status))
4296                 return -EIO;
4297
4298         return 0;
4299 }
4300
4301 /* --------------------------------------------------------------------- */
4302
4303 static const struct tpacpi_rfk_ops uwb_tprfk_ops = {
4304         .get_status = uwb_get_status,
4305         .set_status = uwb_set_status,
4306 };
4307
4308 static void uwb_exit(void)
4309 {
4310         tpacpi_destroy_rfkill(TPACPI_RFK_UWB_SW_ID);
4311 }
4312
4313 static int __init uwb_init(struct ibm_init_struct *iibm)
4314 {
4315         int res;
4316         int status = 0;
4317
4318         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4319                         "initializing uwb subdriver\n");
4320
4321         TPACPI_ACPIHANDLE_INIT(hkey);
4322
4323         tp_features.uwb = hkey_handle &&
4324             acpi_evalf(hkey_handle, &status, "GUWB", "qd");
4325
4326         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4327                 "uwb is %s, status 0x%02x\n",
4328                 str_supported(tp_features.uwb),
4329                 status);
4330
4331 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4332         if (dbg_uwbemul) {
4333                 tp_features.uwb = 1;
4334                 printk(TPACPI_INFO
4335                         "uwb switch emulation enabled\n");
4336         } else
4337 #endif
4338         if (tp_features.uwb &&
4339             !(status & TP_ACPI_UWB_HWPRESENT)) {
4340                 /* no uwb hardware present in system */
4341                 tp_features.uwb = 0;
4342                 dbg_printk(TPACPI_DBG_INIT,
4343                            "uwb hardware not installed\n");
4344         }
4345
4346         if (!tp_features.uwb)
4347                 return 1;
4348
4349         res = tpacpi_new_rfkill(TPACPI_RFK_UWB_SW_ID,
4350                                 &uwb_tprfk_ops,
4351                                 RFKILL_TYPE_UWB,
4352                                 TPACPI_RFK_UWB_SW_NAME,
4353                                 false);
4354         return res;
4355 }
4356
4357 static struct ibm_struct uwb_driver_data = {
4358         .name = "uwb",
4359         .exit = uwb_exit,
4360         .flags.experimental = 1,
4361 };
4362
4363 /*************************************************************************
4364  * Video subdriver
4365  */
4366
4367 #ifdef CONFIG_THINKPAD_ACPI_VIDEO
4368
4369 enum video_access_mode {
4370         TPACPI_VIDEO_NONE = 0,
4371         TPACPI_VIDEO_570,       /* 570 */
4372         TPACPI_VIDEO_770,       /* 600e/x, 770e, 770x */
4373         TPACPI_VIDEO_NEW,       /* all others */
4374 };
4375
4376 enum {  /* video status flags, based on VIDEO_570 */
4377         TP_ACPI_VIDEO_S_LCD = 0x01,     /* LCD output enabled */
4378         TP_ACPI_VIDEO_S_CRT = 0x02,     /* CRT output enabled */
4379         TP_ACPI_VIDEO_S_DVI = 0x08,     /* DVI output enabled */
4380 };
4381
4382 enum {  /* TPACPI_VIDEO_570 constants */
4383         TP_ACPI_VIDEO_570_PHSCMD = 0x87,        /* unknown magic constant :( */
4384         TP_ACPI_VIDEO_570_PHSMASK = 0x03,       /* PHS bits that map to
4385                                                  * video_status_flags */
4386         TP_ACPI_VIDEO_570_PHS2CMD = 0x8b,       /* unknown magic constant :( */
4387         TP_ACPI_VIDEO_570_PHS2SET = 0x80,       /* unknown magic constant :( */
4388 };
4389
4390 static enum video_access_mode video_supported;
4391 static int video_orig_autosw;
4392
4393 static int video_autosw_get(void);
4394 static int video_autosw_set(int enable);
4395
4396 TPACPI_HANDLE(vid2, root, "\\_SB.PCI0.AGPB.VID");       /* G41 */
4397
4398 static int __init video_init(struct ibm_init_struct *iibm)
4399 {
4400         int ivga;
4401
4402         vdbg_printk(TPACPI_DBG_INIT, "initializing video subdriver\n");
4403
4404         TPACPI_ACPIHANDLE_INIT(vid);
4405         TPACPI_ACPIHANDLE_INIT(vid2);
4406
4407         if (vid2_handle && acpi_evalf(NULL, &ivga, "\\IVGA", "d") && ivga)
4408                 /* G41, assume IVGA doesn't change */
4409                 vid_handle = vid2_handle;
4410
4411         if (!vid_handle)
4412                 /* video switching not supported on R30, R31 */
4413                 video_supported = TPACPI_VIDEO_NONE;
4414         else if (acpi_evalf(vid_handle, &video_orig_autosw, "SWIT", "qd"))
4415                 /* 570 */
4416                 video_supported = TPACPI_VIDEO_570;
4417         else if (acpi_evalf(vid_handle, &video_orig_autosw, "^VADL", "qd"))
4418                 /* 600e/x, 770e, 770x */
4419                 video_supported = TPACPI_VIDEO_770;
4420         else
4421                 /* all others */
4422                 video_supported = TPACPI_VIDEO_NEW;
4423
4424         vdbg_printk(TPACPI_DBG_INIT, "video is %s, mode %d\n",
4425                 str_supported(video_supported != TPACPI_VIDEO_NONE),
4426                 video_supported);
4427
4428         return (video_supported != TPACPI_VIDEO_NONE)? 0 : 1;
4429 }
4430
4431 static void video_exit(void)
4432 {
4433         dbg_printk(TPACPI_DBG_EXIT,
4434                    "restoring original video autoswitch mode\n");
4435         if (video_autosw_set(video_orig_autosw))
4436                 printk(TPACPI_ERR "error while trying to restore original "
4437                         "video autoswitch mode\n");
4438 }
4439
4440 static int video_outputsw_get(void)
4441 {
4442         int status = 0;
4443         int i;
4444
4445         switch (video_supported) {
4446         case TPACPI_VIDEO_570:
4447                 if (!acpi_evalf(NULL, &i, "\\_SB.PHS", "dd",
4448                                  TP_ACPI_VIDEO_570_PHSCMD))
4449                         return -EIO;
4450                 status = i & TP_ACPI_VIDEO_570_PHSMASK;
4451                 break;
4452         case TPACPI_VIDEO_770:
4453                 if (!acpi_evalf(NULL, &i, "\\VCDL", "d"))
4454                         return -EIO;
4455                 if (i)
4456                         status |= TP_ACPI_VIDEO_S_LCD;
4457                 if (!acpi_evalf(NULL, &i, "\\VCDC", "d"))
4458                         return -EIO;
4459                 if (i)
4460                         status |= TP_ACPI_VIDEO_S_CRT;
4461                 break;
4462         case TPACPI_VIDEO_NEW:
4463                 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 1) ||
4464                     !acpi_evalf(NULL, &i, "\\VCDC", "d"))
4465                         return -EIO;
4466                 if (i)
4467                         status |= TP_ACPI_VIDEO_S_CRT;
4468
4469                 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0) ||
4470                     !acpi_evalf(NULL, &i, "\\VCDL", "d"))
4471                         return -EIO;
4472                 if (i)
4473                         status |= TP_ACPI_VIDEO_S_LCD;
4474                 if (!acpi_evalf(NULL, &i, "\\VCDD", "d"))
4475                         return -EIO;
4476                 if (i)
4477                         status |= TP_ACPI_VIDEO_S_DVI;
4478                 break;
4479         default:
4480                 return -ENOSYS;
4481         }
4482
4483         return status;
4484 }
4485
4486 static int video_outputsw_set(int status)
4487 {
4488         int autosw;
4489         int res = 0;
4490
4491         switch (video_supported) {
4492         case TPACPI_VIDEO_570:
4493                 res = acpi_evalf(NULL, NULL,
4494                                  "\\_SB.PHS2", "vdd",
4495                                  TP_ACPI_VIDEO_570_PHS2CMD,
4496                                  status | TP_ACPI_VIDEO_570_PHS2SET);
4497                 break;
4498         case TPACPI_VIDEO_770:
4499                 autosw = video_autosw_get();
4500                 if (autosw < 0)
4501                         return autosw;
4502
4503                 res = video_autosw_set(1);
4504                 if (res)
4505                         return res;
4506                 res = acpi_evalf(vid_handle, NULL,
4507                                  "ASWT", "vdd", status * 0x100, 0);
4508                 if (!autosw && video_autosw_set(autosw)) {
4509                         printk(TPACPI_ERR
4510                                "video auto-switch left enabled due to error\n");
4511                         return -EIO;
4512                 }
4513                 break;
4514         case TPACPI_VIDEO_NEW:
4515                 res = acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0x80) &&
4516                       acpi_evalf(NULL, NULL, "\\VSDS", "vdd", status, 1);
4517                 break;
4518         default:
4519                 return -ENOSYS;
4520         }
4521
4522         return (res)? 0 : -EIO;
4523 }
4524
4525 static int video_autosw_get(void)
4526 {
4527         int autosw = 0;
4528
4529         switch (video_supported) {
4530         case TPACPI_VIDEO_570:
4531                 if (!acpi_evalf(vid_handle, &autosw, "SWIT", "d"))
4532                         return -EIO;
4533                 break;
4534         case TPACPI_VIDEO_770:
4535         case TPACPI_VIDEO_NEW:
4536                 if (!acpi_evalf(vid_handle, &autosw, "^VDEE", "d"))
4537                         return -EIO;
4538                 break;
4539         default:
4540                 return -ENOSYS;
4541         }
4542
4543         return autosw & 1;
4544 }
4545
4546 static int video_autosw_set(int enable)
4547 {
4548         if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", (enable)? 1 : 0))
4549                 return -EIO;
4550         return 0;
4551 }
4552
4553 static int video_outputsw_cycle(void)
4554 {
4555         int autosw = video_autosw_get();
4556         int res;
4557
4558         if (autosw < 0)
4559                 return autosw;
4560
4561         switch (video_supported) {
4562         case TPACPI_VIDEO_570:
4563                 res = video_autosw_set(1);
4564                 if (res)
4565                         return res;
4566                 res = acpi_evalf(ec_handle, NULL, "_Q16", "v");
4567                 break;
4568         case TPACPI_VIDEO_770:
4569         case TPACPI_VIDEO_NEW:
4570                 res = video_autosw_set(1);
4571                 if (res)
4572                         return res;
4573                 res = acpi_evalf(vid_handle, NULL, "VSWT", "v");
4574                 break;
4575         default:
4576                 return -ENOSYS;
4577         }
4578         if (!autosw && video_autosw_set(autosw)) {
4579                 printk(TPACPI_ERR
4580                        "video auto-switch left enabled due to error\n");
4581                 return -EIO;
4582         }
4583
4584         return (res)? 0 : -EIO;
4585 }
4586
4587 static int video_expand_toggle(void)
4588 {
4589         switch (video_supported) {
4590         case TPACPI_VIDEO_570:
4591                 return acpi_evalf(ec_handle, NULL, "_Q17", "v")?
4592                         0 : -EIO;
4593         case TPACPI_VIDEO_770:
4594                 return acpi_evalf(vid_handle, NULL, "VEXP", "v")?
4595                         0 : -EIO;
4596         case TPACPI_VIDEO_NEW:
4597                 return acpi_evalf(NULL, NULL, "\\VEXP", "v")?
4598                         0 : -EIO;
4599         default:
4600                 return -ENOSYS;
4601         }
4602         /* not reached */
4603 }
4604
4605 static int video_read(char *p)
4606 {
4607         int status, autosw;
4608         int len = 0;
4609
4610         if (video_supported == TPACPI_VIDEO_NONE) {
4611                 len += sprintf(p + len, "status:\t\tnot supported\n");
4612                 return len;
4613         }
4614
4615         status = video_outputsw_get();
4616         if (status < 0)
4617                 return status;
4618
4619         autosw = video_autosw_get();
4620         if (autosw < 0)
4621                 return autosw;
4622
4623         len += sprintf(p + len, "status:\t\tsupported\n");
4624         len += sprintf(p + len, "lcd:\t\t%s\n", enabled(status, 0));
4625         len += sprintf(p + len, "crt:\t\t%s\n", enabled(status, 1));
4626         if (video_supported == TPACPI_VIDEO_NEW)
4627                 len += sprintf(p + len, "dvi:\t\t%s\n", enabled(status, 3));
4628         len += sprintf(p + len, "auto:\t\t%s\n", enabled(autosw, 0));
4629         len += sprintf(p + len, "commands:\tlcd_enable, lcd_disable\n");
4630         len += sprintf(p + len, "commands:\tcrt_enable, crt_disable\n");
4631         if (video_supported == TPACPI_VIDEO_NEW)
4632                 len += sprintf(p + len, "commands:\tdvi_enable, dvi_disable\n");
4633         len += sprintf(p + len, "commands:\tauto_enable, auto_disable\n");
4634         len += sprintf(p + len, "commands:\tvideo_switch, expand_toggle\n");
4635
4636         return len;
4637 }
4638
4639 static int video_write(char *buf)
4640 {
4641         char *cmd;
4642         int enable, disable, status;
4643         int res;
4644
4645         if (video_supported == TPACPI_VIDEO_NONE)
4646                 return -ENODEV;
4647
4648         enable = 0;
4649         disable = 0;
4650
4651         while ((cmd = next_cmd(&buf))) {
4652                 if (strlencmp(cmd, "lcd_enable") == 0) {
4653                         enable |= TP_ACPI_VIDEO_S_LCD;
4654                 } else if (strlencmp(cmd, "lcd_disable") == 0) {
4655                         disable |= TP_ACPI_VIDEO_S_LCD;
4656                 } else if (strlencmp(cmd, "crt_enable") == 0) {
4657                         enable |= TP_ACPI_VIDEO_S_CRT;
4658                 } else if (strlencmp(cmd, "crt_disable") == 0) {
4659                         disable |= TP_ACPI_VIDEO_S_CRT;
4660                 } else if (video_supported == TPACPI_VIDEO_NEW &&
4661                            strlencmp(cmd, "dvi_enable") == 0) {
4662                         enable |= TP_ACPI_VIDEO_S_DVI;
4663                 } else if (video_supported == TPACPI_VIDEO_NEW &&
4664                            strlencmp(cmd, "dvi_disable") == 0) {
4665                         disable |= TP_ACPI_VIDEO_S_DVI;
4666                 } else if (strlencmp(cmd, "auto_enable") == 0) {
4667                         res = video_autosw_set(1);
4668                         if (res)
4669                                 return res;
4670                 } else if (strlencmp(cmd, "auto_disable") == 0) {
4671                         res = video_autosw_set(0);
4672                         if (res)
4673                                 return res;
4674                 } else if (strlencmp(cmd, "video_switch") == 0) {
4675                         res = video_outputsw_cycle();
4676                         if (res)
4677                                 return res;
4678                 } else if (strlencmp(cmd, "expand_toggle") == 0) {
4679                         res = video_expand_toggle();
4680                         if (res)
4681                                 return res;
4682                 } else
4683                         return -EINVAL;
4684         }
4685
4686         if (enable || disable) {
4687                 status = video_outputsw_get();
4688                 if (status < 0)
4689                         return status;
4690                 res = video_outputsw_set((status & ~disable) | enable);
4691                 if (res)
4692                         return res;
4693         }
4694
4695         return 0;
4696 }
4697
4698 static struct ibm_struct video_driver_data = {
4699         .name = "video",
4700         .read = video_read,
4701         .write = video_write,
4702         .exit = video_exit,
4703 };
4704
4705 #endif /* CONFIG_THINKPAD_ACPI_VIDEO */
4706
4707 /*************************************************************************
4708  * Light (thinklight) subdriver
4709  */
4710
4711 TPACPI_HANDLE(lght, root, "\\LGHT");    /* A21e, A2xm/p, T20-22, X20-21 */
4712 TPACPI_HANDLE(ledb, ec, "LEDB");                /* G4x */
4713
4714 static int light_get_status(void)
4715 {
4716         int status = 0;
4717
4718         if (tp_features.light_status) {
4719                 if (!acpi_evalf(ec_handle, &status, "KBLT", "d"))
4720                         return -EIO;
4721                 return (!!status);
4722         }
4723
4724         return -ENXIO;
4725 }
4726
4727 static int light_set_status(int status)
4728 {
4729         int rc;
4730
4731         if (tp_features.light) {
4732                 if (cmos_handle) {
4733                         rc = acpi_evalf(cmos_handle, NULL, NULL, "vd",
4734                                         (status)?
4735                                                 TP_CMOS_THINKLIGHT_ON :
4736                                                 TP_CMOS_THINKLIGHT_OFF);
4737                 } else {
4738                         rc = acpi_evalf(lght_handle, NULL, NULL, "vd",
4739                                         (status)? 1 : 0);
4740                 }
4741                 return (rc)? 0 : -EIO;
4742         }
4743
4744         return -ENXIO;
4745 }
4746
4747 static void light_set_status_worker(struct work_struct *work)
4748 {
4749         struct tpacpi_led_classdev *data =
4750                         container_of(work, struct tpacpi_led_classdev, work);
4751
4752         if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING))
4753                 light_set_status((data->new_state != TPACPI_LED_OFF));
4754 }
4755
4756 static void light_sysfs_set(struct led_classdev *led_cdev,
4757                         enum led_brightness brightness)
4758 {
4759         struct tpacpi_led_classdev *data =
4760                 container_of(led_cdev,
4761                              struct tpacpi_led_classdev,
4762                              led_classdev);
4763         data->new_state = (brightness != LED_OFF) ?
4764                                 TPACPI_LED_ON : TPACPI_LED_OFF;
4765         queue_work(tpacpi_wq, &data->work);
4766 }
4767
4768 static enum led_brightness light_sysfs_get(struct led_classdev *led_cdev)
4769 {
4770         return (light_get_status() == 1)? LED_FULL : LED_OFF;
4771 }
4772
4773 static struct tpacpi_led_classdev tpacpi_led_thinklight = {
4774         .led_classdev = {
4775                 .name           = "tpacpi::thinklight",
4776                 .brightness_set = &light_sysfs_set,
4777                 .brightness_get = &light_sysfs_get,
4778         }
4779 };
4780
4781 static int __init light_init(struct ibm_init_struct *iibm)
4782 {
4783         int rc;
4784
4785         vdbg_printk(TPACPI_DBG_INIT, "initializing light subdriver\n");
4786
4787         TPACPI_ACPIHANDLE_INIT(ledb);
4788         TPACPI_ACPIHANDLE_INIT(lght);
4789         TPACPI_ACPIHANDLE_INIT(cmos);
4790         INIT_WORK(&tpacpi_led_thinklight.work, light_set_status_worker);
4791
4792         /* light not supported on 570, 600e/x, 770e, 770x, G4x, R30, R31 */
4793         tp_features.light = (cmos_handle || lght_handle) && !ledb_handle;
4794
4795         if (tp_features.light)
4796                 /* light status not supported on
4797                    570, 600e/x, 770e, 770x, G4x, R30, R31, R32, X20 */
4798                 tp_features.light_status =
4799                         acpi_evalf(ec_handle, NULL, "KBLT", "qv");
4800
4801         vdbg_printk(TPACPI_DBG_INIT, "light is %s, light status is %s\n",
4802                 str_supported(tp_features.light),
4803                 str_supported(tp_features.light_status));
4804
4805         if (!tp_features.light)
4806                 return 1;
4807
4808         rc = led_classdev_register(&tpacpi_pdev->dev,
4809                                    &tpacpi_led_thinklight.led_classdev);
4810
4811         if (rc < 0) {
4812                 tp_features.light = 0;
4813                 tp_features.light_status = 0;
4814         } else  {
4815                 rc = 0;
4816         }
4817
4818         return rc;
4819 }
4820
4821 static void light_exit(void)
4822 {
4823         led_classdev_unregister(&tpacpi_led_thinklight.led_classdev);
4824         if (work_pending(&tpacpi_led_thinklight.work))
4825                 flush_workqueue(tpacpi_wq);
4826 }
4827
4828 static int light_read(char *p)
4829 {
4830         int len = 0;
4831         int status;
4832
4833         if (!tp_features.light) {
4834                 len += sprintf(p + len, "status:\t\tnot supported\n");
4835         } else if (!tp_features.light_status) {
4836                 len += sprintf(p + len, "status:\t\tunknown\n");
4837                 len += sprintf(p + len, "commands:\ton, off\n");
4838         } else {
4839                 status = light_get_status();
4840                 if (status < 0)
4841                         return status;
4842                 len += sprintf(p + len, "status:\t\t%s\n", onoff(status, 0));
4843                 len += sprintf(p + len, "commands:\ton, off\n");
4844         }
4845
4846         return len;
4847 }
4848
4849 static int light_write(char *buf)
4850 {
4851         char *cmd;
4852         int newstatus = 0;
4853
4854         if (!tp_features.light)
4855                 return -ENODEV;
4856
4857         while ((cmd = next_cmd(&buf))) {
4858                 if (strlencmp(cmd, "on") == 0) {
4859                         newstatus = 1;
4860                 } else if (strlencmp(cmd, "off") == 0) {
4861                         newstatus = 0;
4862                 } else
4863                         return -EINVAL;
4864         }
4865
4866         return light_set_status(newstatus);
4867 }
4868
4869 static struct ibm_struct light_driver_data = {
4870         .name = "light",
4871         .read = light_read,
4872         .write = light_write,
4873         .exit = light_exit,
4874 };
4875
4876 /*************************************************************************
4877  * CMOS subdriver
4878  */
4879
4880 /* sysfs cmos_command -------------------------------------------------- */
4881 static ssize_t cmos_command_store(struct device *dev,
4882                             struct device_attribute *attr,
4883                             const char *buf, size_t count)
4884 {
4885         unsigned long cmos_cmd;
4886         int res;
4887
4888         if (parse_strtoul(buf, 21, &cmos_cmd))
4889                 return -EINVAL;
4890
4891         res = issue_thinkpad_cmos_command(cmos_cmd);
4892         return (res)? res : count;
4893 }
4894
4895 static struct device_attribute dev_attr_cmos_command =
4896         __ATTR(cmos_command, S_IWUSR, NULL, cmos_command_store);
4897
4898 /* --------------------------------------------------------------------- */
4899
4900 static int __init cmos_init(struct ibm_init_struct *iibm)
4901 {
4902         int res;
4903
4904         vdbg_printk(TPACPI_DBG_INIT,
4905                 "initializing cmos commands subdriver\n");
4906
4907         TPACPI_ACPIHANDLE_INIT(cmos);
4908
4909         vdbg_printk(TPACPI_DBG_INIT, "cmos commands are %s\n",
4910                 str_supported(cmos_handle != NULL));
4911
4912         res = device_create_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
4913         if (res)
4914                 return res;
4915
4916         return (cmos_handle)? 0 : 1;
4917 }
4918
4919 static void cmos_exit(void)
4920 {
4921         device_remove_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
4922 }
4923
4924 static int cmos_read(char *p)
4925 {
4926         int len = 0;
4927
4928         /* cmos not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
4929            R30, R31, T20-22, X20-21 */
4930         if (!cmos_handle)
4931                 len += sprintf(p + len, "status:\t\tnot supported\n");
4932         else {
4933                 len += sprintf(p + len, "status:\t\tsupported\n");
4934                 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-21)\n");
4935         }
4936
4937         return len;
4938 }
4939
4940 static int cmos_write(char *buf)
4941 {
4942         char *cmd;
4943         int cmos_cmd, res;
4944
4945         while ((cmd = next_cmd(&buf))) {
4946                 if (sscanf(cmd, "%u", &cmos_cmd) == 1 &&
4947                     cmos_cmd >= 0 && cmos_cmd <= 21) {
4948                         /* cmos_cmd set */
4949                 } else
4950                         return -EINVAL;
4951
4952                 res = issue_thinkpad_cmos_command(cmos_cmd);
4953                 if (res)
4954                         return res;
4955         }
4956
4957         return 0;
4958 }
4959
4960 static struct ibm_struct cmos_driver_data = {
4961         .name = "cmos",
4962         .read = cmos_read,
4963         .write = cmos_write,
4964         .exit = cmos_exit,
4965 };
4966
4967 /*************************************************************************
4968  * LED subdriver
4969  */
4970
4971 enum led_access_mode {
4972         TPACPI_LED_NONE = 0,
4973         TPACPI_LED_570, /* 570 */
4974         TPACPI_LED_OLD, /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
4975         TPACPI_LED_NEW, /* all others */
4976 };
4977
4978 enum {  /* For TPACPI_LED_OLD */
4979         TPACPI_LED_EC_HLCL = 0x0c,      /* EC reg to get led to power on */
4980         TPACPI_LED_EC_HLBL = 0x0d,      /* EC reg to blink a lit led */
4981         TPACPI_LED_EC_HLMS = 0x0e,      /* EC reg to select led to command */
4982 };
4983
4984 static enum led_access_mode led_supported;
4985
4986 TPACPI_HANDLE(led, ec, "SLED",  /* 570 */
4987            "SYSL",              /* 600e/x, 770e, 770x, A21e, A2xm/p, */
4988                                 /* T20-22, X20-21 */
4989            "LED",               /* all others */
4990            );                   /* R30, R31 */
4991
4992 #define TPACPI_LED_NUMLEDS 16
4993 static struct tpacpi_led_classdev *tpacpi_leds;
4994 static enum led_status_t tpacpi_led_state_cache[TPACPI_LED_NUMLEDS];
4995 static const char * const tpacpi_led_names[TPACPI_LED_NUMLEDS] = {
4996         /* there's a limit of 19 chars + NULL before 2.6.26 */
4997         "tpacpi::power",
4998         "tpacpi:orange:batt",
4999         "tpacpi:green:batt",
5000         "tpacpi::dock_active",
5001         "tpacpi::bay_active",
5002         "tpacpi::dock_batt",
5003         "tpacpi::unknown_led",
5004         "tpacpi::standby",
5005         "tpacpi::dock_status1",
5006         "tpacpi::dock_status2",
5007         "tpacpi::unknown_led2",
5008         "tpacpi::unknown_led3",
5009         "tpacpi::thinkvantage",
5010 };
5011 #define TPACPI_SAFE_LEDS        0x1081U
5012
5013 static inline bool tpacpi_is_led_restricted(const unsigned int led)
5014 {
5015 #ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS
5016         return false;
5017 #else
5018         return (1U & (TPACPI_SAFE_LEDS >> led)) == 0;
5019 #endif
5020 }
5021
5022 static int led_get_status(const unsigned int led)
5023 {
5024         int status;
5025         enum led_status_t led_s;
5026
5027         switch (led_supported) {
5028         case TPACPI_LED_570:
5029                 if (!acpi_evalf(ec_handle,
5030                                 &status, "GLED", "dd", 1 << led))
5031                         return -EIO;
5032                 led_s = (status == 0)?
5033                                 TPACPI_LED_OFF :
5034                                 ((status == 1)?
5035                                         TPACPI_LED_ON :
5036                                         TPACPI_LED_BLINK);
5037                 tpacpi_led_state_cache[led] = led_s;
5038                 return led_s;
5039         default:
5040                 return -ENXIO;
5041         }
5042
5043         /* not reached */
5044 }
5045
5046 static int led_set_status(const unsigned int led,
5047                           const enum led_status_t ledstatus)
5048 {
5049         /* off, on, blink. Index is led_status_t */
5050         static const unsigned int led_sled_arg1[] = { 0, 1, 3 };
5051         static const unsigned int led_led_arg1[] = { 0, 0x80, 0xc0 };
5052
5053         int rc = 0;
5054
5055         switch (led_supported) {
5056         case TPACPI_LED_570:
5057                 /* 570 */
5058                 if (unlikely(led > 7))
5059                         return -EINVAL;
5060                 if (unlikely(tpacpi_is_led_restricted(led)))
5061                         return -EPERM;
5062                 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
5063                                 (1 << led), led_sled_arg1[ledstatus]))
5064                         rc = -EIO;
5065                 break;
5066         case TPACPI_LED_OLD:
5067                 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */
5068                 if (unlikely(led > 7))
5069                         return -EINVAL;
5070                 if (unlikely(tpacpi_is_led_restricted(led)))
5071                         return -EPERM;
5072                 rc = ec_write(TPACPI_LED_EC_HLMS, (1 << led));
5073                 if (rc >= 0)
5074                         rc = ec_write(TPACPI_LED_EC_HLBL,
5075                                       (ledstatus == TPACPI_LED_BLINK) << led);
5076                 if (rc >= 0)
5077                         rc = ec_write(TPACPI_LED_EC_HLCL,
5078                                       (ledstatus != TPACPI_LED_OFF) << led);
5079                 break;
5080         case TPACPI_LED_NEW:
5081                 /* all others */
5082                 if (unlikely(led >= TPACPI_LED_NUMLEDS))
5083                         return -EINVAL;
5084                 if (unlikely(tpacpi_is_led_restricted(led)))
5085                         return -EPERM;
5086                 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
5087                                 led, led_led_arg1[ledstatus]))
5088                         rc = -EIO;
5089                 break;
5090         default:
5091                 rc = -ENXIO;
5092         }
5093
5094         if (!rc)
5095                 tpacpi_led_state_cache[led] = ledstatus;
5096
5097         return rc;
5098 }
5099
5100 static void led_set_status_worker(struct work_struct *work)
5101 {
5102         struct tpacpi_led_classdev *data =
5103                 container_of(work, struct tpacpi_led_classdev, work);
5104
5105         if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING))
5106                 led_set_status(data->led, data->new_state);
5107 }
5108
5109 static void led_sysfs_set(struct led_classdev *led_cdev,
5110                         enum led_brightness brightness)
5111 {
5112         struct tpacpi_led_classdev *data = container_of(led_cdev,
5113                              struct tpacpi_led_classdev, led_classdev);
5114
5115         if (brightness == LED_OFF)
5116                 data->new_state = TPACPI_LED_OFF;
5117         else if (tpacpi_led_state_cache[data->led] != TPACPI_LED_BLINK)
5118                 data->new_state = TPACPI_LED_ON;
5119         else
5120                 data->new_state = TPACPI_LED_BLINK;
5121
5122         queue_work(tpacpi_wq, &data->work);
5123 }
5124
5125 static int led_sysfs_blink_set(struct led_classdev *led_cdev,
5126                         unsigned long *delay_on, unsigned long *delay_off)
5127 {
5128         struct tpacpi_led_classdev *data = container_of(led_cdev,
5129                              struct tpacpi_led_classdev, led_classdev);
5130
5131         /* Can we choose the flash rate? */
5132         if (*delay_on == 0 && *delay_off == 0) {
5133                 /* yes. set them to the hardware blink rate (1 Hz) */
5134                 *delay_on = 500; /* ms */
5135                 *delay_off = 500; /* ms */
5136         } else if ((*delay_on != 500) || (*delay_off != 500))
5137                 return -EINVAL;
5138
5139         data->new_state = TPACPI_LED_BLINK;
5140         queue_work(tpacpi_wq, &data->work);
5141
5142         return 0;
5143 }
5144
5145 static enum led_brightness led_sysfs_get(struct led_classdev *led_cdev)
5146 {
5147         int rc;
5148
5149         struct tpacpi_led_classdev *data = container_of(led_cdev,
5150                              struct tpacpi_led_classdev, led_classdev);
5151
5152         rc = led_get_status(data->led);
5153
5154         if (rc == TPACPI_LED_OFF || rc < 0)
5155                 rc = LED_OFF;   /* no error handling in led class :( */
5156         else
5157                 rc = LED_FULL;
5158
5159         return rc;
5160 }
5161
5162 static void led_exit(void)
5163 {
5164         unsigned int i;
5165
5166         for (i = 0; i < TPACPI_LED_NUMLEDS; i++) {
5167                 if (tpacpi_leds[i].led_classdev.name)
5168                         led_classdev_unregister(&tpacpi_leds[i].led_classdev);
5169         }
5170
5171         kfree(tpacpi_leds);
5172 }
5173
5174 static int __init tpacpi_init_led(unsigned int led)
5175 {
5176         int rc;
5177
5178         tpacpi_leds[led].led = led;
5179
5180         /* LEDs with no name don't get registered */
5181         if (!tpacpi_led_names[led])
5182                 return 0;
5183
5184         tpacpi_leds[led].led_classdev.brightness_set = &led_sysfs_set;
5185         tpacpi_leds[led].led_classdev.blink_set = &led_sysfs_blink_set;
5186         if (led_supported == TPACPI_LED_570)
5187                 tpacpi_leds[led].led_classdev.brightness_get =
5188                                                 &led_sysfs_get;
5189
5190         tpacpi_leds[led].led_classdev.name = tpacpi_led_names[led];
5191
5192         INIT_WORK(&tpacpi_leds[led].work, led_set_status_worker);
5193
5194         rc = led_classdev_register(&tpacpi_pdev->dev,
5195                                 &tpacpi_leds[led].led_classdev);
5196         if (rc < 0)
5197                 tpacpi_leds[led].led_classdev.name = NULL;
5198
5199         return rc;
5200 }
5201
5202 static const struct tpacpi_quirk led_useful_qtable[] __initconst = {
5203         TPACPI_Q_IBM('1', 'E', 0x009f), /* A30 */
5204         TPACPI_Q_IBM('1', 'N', 0x009f), /* A31 */
5205         TPACPI_Q_IBM('1', 'G', 0x009f), /* A31 */
5206
5207         TPACPI_Q_IBM('1', 'I', 0x0097), /* T30 */
5208         TPACPI_Q_IBM('1', 'R', 0x0097), /* T40, T41, T42, R50, R51 */
5209         TPACPI_Q_IBM('7', '0', 0x0097), /* T43, R52 */
5210         TPACPI_Q_IBM('1', 'Y', 0x0097), /* T43 */
5211         TPACPI_Q_IBM('1', 'W', 0x0097), /* R50e */
5212         TPACPI_Q_IBM('1', 'V', 0x0097), /* R51 */
5213         TPACPI_Q_IBM('7', '8', 0x0097), /* R51e */
5214         TPACPI_Q_IBM('7', '6', 0x0097), /* R52 */
5215
5216         TPACPI_Q_IBM('1', 'K', 0x00bf), /* X30 */
5217         TPACPI_Q_IBM('1', 'Q', 0x00bf), /* X31, X32 */
5218         TPACPI_Q_IBM('1', 'U', 0x00bf), /* X40 */
5219         TPACPI_Q_IBM('7', '4', 0x00bf), /* X41 */
5220         TPACPI_Q_IBM('7', '5', 0x00bf), /* X41t */
5221
5222         TPACPI_Q_IBM('7', '9', 0x1f97), /* T60 (1) */
5223         TPACPI_Q_IBM('7', '7', 0x1f97), /* Z60* (1) */
5224         TPACPI_Q_IBM('7', 'F', 0x1f97), /* Z61* (1) */
5225         TPACPI_Q_IBM('7', 'B', 0x1fb7), /* X60 (1) */
5226
5227         /* (1) - may have excess leds enabled on MSB */
5228
5229         /* Defaults (order matters, keep last, don't reorder!) */
5230         { /* Lenovo */
5231           .vendor = PCI_VENDOR_ID_LENOVO,
5232           .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY,
5233           .quirks = 0x1fffU,
5234         },
5235         { /* IBM ThinkPads with no EC version string */
5236           .vendor = PCI_VENDOR_ID_IBM,
5237           .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_UNKNOWN,
5238           .quirks = 0x00ffU,
5239         },
5240         { /* IBM ThinkPads with EC version string */
5241           .vendor = PCI_VENDOR_ID_IBM,
5242           .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY,
5243           .quirks = 0x00bfU,
5244         },
5245 };
5246
5247 #undef TPACPI_LEDQ_IBM
5248 #undef TPACPI_LEDQ_LNV
5249
5250 static int __init led_init(struct ibm_init_struct *iibm)
5251 {
5252         unsigned int i;
5253         int rc;
5254         unsigned long useful_leds;
5255
5256         vdbg_printk(TPACPI_DBG_INIT, "initializing LED subdriver\n");
5257
5258         TPACPI_ACPIHANDLE_INIT(led);
5259
5260         if (!led_handle)
5261                 /* led not supported on R30, R31 */
5262                 led_supported = TPACPI_LED_NONE;
5263         else if (strlencmp(led_path, "SLED") == 0)
5264                 /* 570 */
5265                 led_supported = TPACPI_LED_570;
5266         else if (strlencmp(led_path, "SYSL") == 0)
5267                 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
5268                 led_supported = TPACPI_LED_OLD;
5269         else
5270                 /* all others */
5271                 led_supported = TPACPI_LED_NEW;
5272
5273         vdbg_printk(TPACPI_DBG_INIT, "LED commands are %s, mode %d\n",
5274                 str_supported(led_supported), led_supported);
5275
5276         if (led_supported == TPACPI_LED_NONE)
5277                 return 1;
5278
5279         tpacpi_leds = kzalloc(sizeof(*tpacpi_leds) * TPACPI_LED_NUMLEDS,
5280                               GFP_KERNEL);
5281         if (!tpacpi_leds) {
5282                 printk(TPACPI_ERR "Out of memory for LED data\n");
5283                 return -ENOMEM;
5284         }
5285
5286         useful_leds = tpacpi_check_quirks(led_useful_qtable,
5287                                           ARRAY_SIZE(led_useful_qtable));
5288
5289         for (i = 0; i < TPACPI_LED_NUMLEDS; i++) {
5290                 if (!tpacpi_is_led_restricted(i) &&
5291                     test_bit(i, &useful_leds)) {
5292                         rc = tpacpi_init_led(i);
5293                         if (rc < 0) {
5294                                 led_exit();
5295                                 return rc;
5296                         }
5297                 }
5298         }
5299
5300 #ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS
5301         printk(TPACPI_NOTICE
5302                 "warning: userspace override of important "
5303                 "firmware LEDs is enabled\n");
5304 #endif
5305         return 0;
5306 }
5307
5308 #define str_led_status(s) \
5309         ((s) == TPACPI_LED_OFF ? "off" : \
5310                 ((s) == TPACPI_LED_ON ? "on" : "blinking"))
5311
5312 static int led_read(char *p)
5313 {
5314         int len = 0;
5315
5316         if (!led_supported) {
5317                 len += sprintf(p + len, "status:\t\tnot supported\n");
5318                 return len;
5319         }
5320         len += sprintf(p + len, "status:\t\tsupported\n");
5321
5322         if (led_supported == TPACPI_LED_570) {
5323                 /* 570 */
5324                 int i, status;
5325                 for (i = 0; i < 8; i++) {
5326                         status = led_get_status(i);
5327                         if (status < 0)
5328                                 return -EIO;
5329                         len += sprintf(p + len, "%d:\t\t%s\n",
5330                                        i, str_led_status(status));
5331                 }
5332         }
5333
5334         len += sprintf(p + len, "commands:\t"
5335                        "<led> on, <led> off, <led> blink (<led> is 0-15)\n");
5336
5337         return len;
5338 }
5339
5340 static int led_write(char *buf)
5341 {
5342         char *cmd;
5343         int led, rc;
5344         enum led_status_t s;
5345
5346         if (!led_supported)
5347                 return -ENODEV;
5348
5349         while ((cmd = next_cmd(&buf))) {
5350                 if (sscanf(cmd, "%d", &led) != 1 || led < 0 || led > 15)
5351                         return -EINVAL;
5352
5353                 if (strstr(cmd, "off")) {
5354                         s = TPACPI_LED_OFF;
5355                 } else if (strstr(cmd, "on")) {
5356                         s = TPACPI_LED_ON;
5357                 } else if (strstr(cmd, "blink")) {
5358                         s = TPACPI_LED_BLINK;
5359                 } else {
5360                         return -EINVAL;
5361                 }
5362
5363                 rc = led_set_status(led, s);
5364                 if (rc < 0)
5365                         return rc;
5366         }
5367
5368         return 0;
5369 }
5370
5371 static struct ibm_struct led_driver_data = {
5372         .name = "led",
5373         .read = led_read,
5374         .write = led_write,
5375         .exit = led_exit,
5376 };
5377
5378 /*************************************************************************
5379  * Beep subdriver
5380  */
5381
5382 TPACPI_HANDLE(beep, ec, "BEEP");        /* all except R30, R31 */
5383
5384 #define TPACPI_BEEP_Q1 0x0001
5385
5386 static const struct tpacpi_quirk beep_quirk_table[] __initconst = {
5387         TPACPI_Q_IBM('I', 'M', TPACPI_BEEP_Q1), /* 570 */
5388         TPACPI_Q_IBM('I', 'U', TPACPI_BEEP_Q1), /* 570E - unverified */
5389 };
5390
5391 static int __init beep_init(struct ibm_init_struct *iibm)
5392 {
5393         unsigned long quirks;
5394
5395         vdbg_printk(TPACPI_DBG_INIT, "initializing beep subdriver\n");
5396
5397         TPACPI_ACPIHANDLE_INIT(beep);
5398
5399         vdbg_printk(TPACPI_DBG_INIT, "beep is %s\n",
5400                 str_supported(beep_handle != NULL));
5401
5402         quirks = tpacpi_check_quirks(beep_quirk_table,
5403                                      ARRAY_SIZE(beep_quirk_table));
5404
5405         tp_features.beep_needs_two_args = !!(quirks & TPACPI_BEEP_Q1);
5406
5407         return (beep_handle)? 0 : 1;
5408 }
5409
5410 static int beep_read(char *p)
5411 {
5412         int len = 0;
5413
5414         if (!beep_handle)
5415                 len += sprintf(p + len, "status:\t\tnot supported\n");
5416         else {
5417                 len += sprintf(p + len, "status:\t\tsupported\n");
5418                 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-17)\n");
5419         }
5420
5421         return len;
5422 }
5423
5424 static int beep_write(char *buf)
5425 {
5426         char *cmd;
5427         int beep_cmd;
5428
5429         if (!beep_handle)
5430                 return -ENODEV;
5431
5432         while ((cmd = next_cmd(&buf))) {
5433                 if (sscanf(cmd, "%u", &beep_cmd) == 1 &&
5434                     beep_cmd >= 0 && beep_cmd <= 17) {
5435                         /* beep_cmd set */
5436                 } else
5437                         return -EINVAL;
5438                 if (tp_features.beep_needs_two_args) {
5439                         if (!acpi_evalf(beep_handle, NULL, NULL, "vdd",
5440                                         beep_cmd, 0))
5441                                 return -EIO;
5442                 } else {
5443                         if (!acpi_evalf(beep_handle, NULL, NULL, "vd",
5444                                         beep_cmd))
5445                                 return -EIO;
5446                 }
5447         }
5448
5449         return 0;
5450 }
5451
5452 static struct ibm_struct beep_driver_data = {
5453         .name = "beep",
5454         .read = beep_read,
5455         .write = beep_write,
5456 };
5457
5458 /*************************************************************************
5459  * Thermal subdriver
5460  */
5461
5462 enum thermal_access_mode {
5463         TPACPI_THERMAL_NONE = 0,        /* No thermal support */
5464         TPACPI_THERMAL_ACPI_TMP07,      /* Use ACPI TMP0-7 */
5465         TPACPI_THERMAL_ACPI_UPDT,       /* Use ACPI TMP0-7 with UPDT */
5466         TPACPI_THERMAL_TPEC_8,          /* Use ACPI EC regs, 8 sensors */
5467         TPACPI_THERMAL_TPEC_16,         /* Use ACPI EC regs, 16 sensors */
5468 };
5469
5470 enum { /* TPACPI_THERMAL_TPEC_* */
5471         TP_EC_THERMAL_TMP0 = 0x78,      /* ACPI EC regs TMP 0..7 */
5472         TP_EC_THERMAL_TMP8 = 0xC0,      /* ACPI EC regs TMP 8..15 */
5473         TP_EC_THERMAL_TMP_NA = -128,    /* ACPI EC sensor not available */
5474 };
5475
5476 #define TPACPI_MAX_THERMAL_SENSORS 16   /* Max thermal sensors supported */
5477 struct ibm_thermal_sensors_struct {
5478         s32 temp[TPACPI_MAX_THERMAL_SENSORS];
5479 };
5480
5481 static enum thermal_access_mode thermal_read_mode;
5482
5483 /* idx is zero-based */
5484 static int thermal_get_sensor(int idx, s32 *value)
5485 {
5486         int t;
5487         s8 tmp;
5488         char tmpi[5];
5489
5490         t = TP_EC_THERMAL_TMP0;
5491
5492         switch (thermal_read_mode) {
5493 #if TPACPI_MAX_THERMAL_SENSORS >= 16
5494         case TPACPI_THERMAL_TPEC_16:
5495                 if (idx >= 8 && idx <= 15) {
5496                         t = TP_EC_THERMAL_TMP8;
5497                         idx -= 8;
5498                 }
5499                 /* fallthrough */
5500 #endif
5501         case TPACPI_THERMAL_TPEC_8:
5502                 if (idx <= 7) {
5503                         if (!acpi_ec_read(t + idx, &tmp))
5504                                 return -EIO;
5505                         *value = tmp * 1000;
5506                         return 0;
5507                 }
5508                 break;
5509
5510         case TPACPI_THERMAL_ACPI_UPDT:
5511                 if (idx <= 7) {
5512                         snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
5513                         if (!acpi_evalf(ec_handle, NULL, "UPDT", "v"))
5514                                 return -EIO;
5515                         if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
5516                                 return -EIO;
5517                         *value = (t - 2732) * 100;
5518                         return 0;
5519                 }
5520                 break;
5521
5522         case TPACPI_THERMAL_ACPI_TMP07:
5523                 if (idx <= 7) {
5524                         snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
5525                         if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
5526                                 return -EIO;
5527                         if (t > 127 || t < -127)
5528                                 t = TP_EC_THERMAL_TMP_NA;
5529                         *value = t * 1000;
5530                         return 0;
5531                 }
5532                 break;
5533
5534         case TPACPI_THERMAL_NONE:
5535         default:
5536                 return -ENOSYS;
5537         }
5538
5539         return -EINVAL;
5540 }
5541
5542 static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s)
5543 {
5544         int res, i;
5545         int n;
5546
5547         n = 8;
5548         i = 0;
5549
5550         if (!s)
5551                 return -EINVAL;
5552
5553         if (thermal_read_mode == TPACPI_THERMAL_TPEC_16)
5554                 n = 16;
5555
5556         for (i = 0 ; i < n; i++) {
5557                 res = thermal_get_sensor(i, &s->temp[i]);
5558                 if (res)
5559                         return res;
5560         }
5561
5562         return n;
5563 }
5564
5565 /* sysfs temp##_input -------------------------------------------------- */
5566
5567 static ssize_t thermal_temp_input_show(struct device *dev,
5568                            struct device_attribute *attr,
5569                            char *buf)
5570 {
5571         struct sensor_device_attribute *sensor_attr =
5572                                         to_sensor_dev_attr(attr);
5573         int idx = sensor_attr->index;
5574         s32 value;
5575         int res;
5576
5577         res = thermal_get_sensor(idx, &value);
5578         if (res)
5579                 return res;
5580         if (value == TP_EC_THERMAL_TMP_NA * 1000)
5581                 return -ENXIO;
5582
5583         return snprintf(buf, PAGE_SIZE, "%d\n", value);
5584 }
5585
5586 #define THERMAL_SENSOR_ATTR_TEMP(_idxA, _idxB) \
5587          SENSOR_ATTR(temp##_idxA##_input, S_IRUGO, \
5588                      thermal_temp_input_show, NULL, _idxB)
5589
5590 static struct sensor_device_attribute sensor_dev_attr_thermal_temp_input[] = {
5591         THERMAL_SENSOR_ATTR_TEMP(1, 0),
5592         THERMAL_SENSOR_ATTR_TEMP(2, 1),
5593         THERMAL_SENSOR_ATTR_TEMP(3, 2),
5594         THERMAL_SENSOR_ATTR_TEMP(4, 3),
5595         THERMAL_SENSOR_ATTR_TEMP(5, 4),
5596         THERMAL_SENSOR_ATTR_TEMP(6, 5),
5597         THERMAL_SENSOR_ATTR_TEMP(7, 6),
5598         THERMAL_SENSOR_ATTR_TEMP(8, 7),
5599         THERMAL_SENSOR_ATTR_TEMP(9, 8),
5600         THERMAL_SENSOR_ATTR_TEMP(10, 9),
5601         THERMAL_SENSOR_ATTR_TEMP(11, 10),
5602         THERMAL_SENSOR_ATTR_TEMP(12, 11),
5603         THERMAL_SENSOR_ATTR_TEMP(13, 12),
5604         THERMAL_SENSOR_ATTR_TEMP(14, 13),
5605         THERMAL_SENSOR_ATTR_TEMP(15, 14),
5606         THERMAL_SENSOR_ATTR_TEMP(16, 15),
5607 };
5608
5609 #define THERMAL_ATTRS(X) \
5610         &sensor_dev_attr_thermal_temp_input[X].dev_attr.attr
5611
5612 static struct attribute *thermal_temp_input_attr[] = {
5613         THERMAL_ATTRS(8),
5614         THERMAL_ATTRS(9),
5615         THERMAL_ATTRS(10),
5616         THERMAL_ATTRS(11),
5617         THERMAL_ATTRS(12),
5618         THERMAL_ATTRS(13),
5619         THERMAL_ATTRS(14),
5620         THERMAL_ATTRS(15),
5621         THERMAL_ATTRS(0),
5622         THERMAL_ATTRS(1),
5623         THERMAL_ATTRS(2),
5624         THERMAL_ATTRS(3),
5625         THERMAL_ATTRS(4),
5626         THERMAL_ATTRS(5),
5627         THERMAL_ATTRS(6),
5628         THERMAL_ATTRS(7),
5629         NULL
5630 };
5631
5632 static const struct attribute_group thermal_temp_input16_group = {
5633         .attrs = thermal_temp_input_attr
5634 };
5635
5636 static const struct attribute_group thermal_temp_input8_group = {
5637         .attrs = &thermal_temp_input_attr[8]
5638 };
5639
5640 #undef THERMAL_SENSOR_ATTR_TEMP
5641 #undef THERMAL_ATTRS
5642
5643 /* --------------------------------------------------------------------- */
5644
5645 static int __init thermal_init(struct ibm_init_struct *iibm)
5646 {
5647         u8 t, ta1, ta2;
5648         int i;
5649         int acpi_tmp7;
5650         int res;
5651
5652         vdbg_printk(TPACPI_DBG_INIT, "initializing thermal subdriver\n");
5653
5654         acpi_tmp7 = acpi_evalf(ec_handle, NULL, "TMP7", "qv");
5655
5656         if (thinkpad_id.ec_model) {
5657                 /*
5658                  * Direct EC access mode: sensors at registers
5659                  * 0x78-0x7F, 0xC0-0xC7.  Registers return 0x00 for
5660                  * non-implemented, thermal sensors return 0x80 when
5661                  * not available
5662                  */
5663
5664                 ta1 = ta2 = 0;
5665                 for (i = 0; i < 8; i++) {
5666                         if (acpi_ec_read(TP_EC_THERMAL_TMP0 + i, &t)) {
5667                                 ta1 |= t;
5668                         } else {
5669                                 ta1 = 0;
5670                                 break;
5671                         }
5672                         if (acpi_ec_read(TP_EC_THERMAL_TMP8 + i, &t)) {
5673                                 ta2 |= t;
5674                         } else {
5675                                 ta1 = 0;
5676                                 break;
5677                         }
5678                 }
5679                 if (ta1 == 0) {
5680                         /* This is sheer paranoia, but we handle it anyway */
5681                         if (acpi_tmp7) {
5682                                 printk(TPACPI_ERR
5683                                        "ThinkPad ACPI EC access misbehaving, "
5684                                        "falling back to ACPI TMPx access "
5685                                        "mode\n");
5686                                 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
5687                         } else {
5688                                 printk(TPACPI_ERR
5689                                        "ThinkPad ACPI EC access misbehaving, "
5690                                        "disabling thermal sensors access\n");
5691                                 thermal_read_mode = TPACPI_THERMAL_NONE;
5692                         }
5693                 } else {
5694                         thermal_read_mode =
5695                             (ta2 != 0) ?
5696                             TPACPI_THERMAL_TPEC_16 : TPACPI_THERMAL_TPEC_8;
5697                 }
5698         } else if (acpi_tmp7) {
5699                 if (acpi_evalf(ec_handle, NULL, "UPDT", "qv")) {
5700                         /* 600e/x, 770e, 770x */
5701                         thermal_read_mode = TPACPI_THERMAL_ACPI_UPDT;
5702                 } else {
5703                         /* Standard ACPI TMPx access, max 8 sensors */
5704                         thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
5705                 }
5706         } else {
5707                 /* temperatures not supported on 570, G4x, R30, R31, R32 */
5708                 thermal_read_mode = TPACPI_THERMAL_NONE;
5709         }
5710
5711         vdbg_printk(TPACPI_DBG_INIT, "thermal is %s, mode %d\n",
5712                 str_supported(thermal_read_mode != TPACPI_THERMAL_NONE),
5713                 thermal_read_mode);
5714
5715         switch (thermal_read_mode) {
5716         case TPACPI_THERMAL_TPEC_16:
5717                 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
5718                                 &thermal_temp_input16_group);
5719                 if (res)
5720                         return res;
5721                 break;
5722         case TPACPI_THERMAL_TPEC_8:
5723         case TPACPI_THERMAL_ACPI_TMP07:
5724         case TPACPI_THERMAL_ACPI_UPDT:
5725                 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
5726                                 &thermal_temp_input8_group);
5727                 if (res)
5728                         return res;
5729                 break;
5730         case TPACPI_THERMAL_NONE:
5731         default:
5732                 return 1;
5733         }
5734
5735         return 0;
5736 }
5737
5738 static void thermal_exit(void)
5739 {
5740         switch (thermal_read_mode) {
5741         case TPACPI_THERMAL_TPEC_16:
5742                 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
5743                                    &thermal_temp_input16_group);
5744                 break;
5745         case TPACPI_THERMAL_TPEC_8:
5746         case TPACPI_THERMAL_ACPI_TMP07:
5747         case TPACPI_THERMAL_ACPI_UPDT:
5748                 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
5749                                    &thermal_temp_input16_group);
5750                 break;
5751         case TPACPI_THERMAL_NONE:
5752         default:
5753                 break;
5754         }
5755 }
5756
5757 static int thermal_read(char *p)
5758 {
5759         int len = 0;
5760         int n, i;
5761         struct ibm_thermal_sensors_struct t;
5762
5763         n = thermal_get_sensors(&t);
5764         if (unlikely(n < 0))
5765                 return n;
5766
5767         len += sprintf(p + len, "temperatures:\t");
5768
5769         if (n > 0) {
5770                 for (i = 0; i < (n - 1); i++)
5771                         len += sprintf(p + len, "%d ", t.temp[i] / 1000);
5772                 len += sprintf(p + len, "%d\n", t.temp[i] / 1000);
5773         } else
5774                 len += sprintf(p + len, "not supported\n");
5775
5776         return len;
5777 }
5778
5779 static struct ibm_struct thermal_driver_data = {
5780         .name = "thermal",
5781         .read = thermal_read,
5782         .exit = thermal_exit,
5783 };
5784
5785 /*************************************************************************
5786  * EC Dump subdriver
5787  */
5788
5789 static u8 ecdump_regs[256];
5790
5791 static int ecdump_read(char *p)
5792 {
5793         int len = 0;
5794         int i, j;
5795         u8 v;
5796
5797         len += sprintf(p + len, "EC      "
5798                        " +00 +01 +02 +03 +04 +05 +06 +07"
5799                        " +08 +09 +0a +0b +0c +0d +0e +0f\n");
5800         for (i = 0; i < 256; i += 16) {
5801                 len += sprintf(p + len, "EC 0x%02x:", i);
5802                 for (j = 0; j < 16; j++) {
5803                         if (!acpi_ec_read(i + j, &v))
5804                                 break;
5805                         if (v != ecdump_regs[i + j])
5806                                 len += sprintf(p + len, " *%02x", v);
5807                         else
5808                                 len += sprintf(p + len, "  %02x", v);
5809                         ecdump_regs[i + j] = v;
5810                 }
5811                 len += sprintf(p + len, "\n");
5812                 if (j != 16)
5813                         break;
5814         }
5815
5816         /* These are way too dangerous to advertise openly... */
5817 #if 0
5818         len += sprintf(p + len, "commands:\t0x<offset> 0x<value>"
5819                        " (<offset> is 00-ff, <value> is 00-ff)\n");
5820         len += sprintf(p + len, "commands:\t0x<offset> <value>  "
5821                        " (<offset> is 00-ff, <value> is 0-255)\n");
5822 #endif
5823         return len;
5824 }
5825
5826 static int ecdump_write(char *buf)
5827 {
5828         char *cmd;
5829         int i, v;
5830
5831         while ((cmd = next_cmd(&buf))) {
5832                 if (sscanf(cmd, "0x%x 0x%x", &i, &v) == 2) {
5833                         /* i and v set */
5834                 } else if (sscanf(cmd, "0x%x %u", &i, &v) == 2) {
5835                         /* i and v set */
5836                 } else
5837                         return -EINVAL;
5838                 if (i >= 0 && i < 256 && v >= 0 && v < 256) {
5839                         if (!acpi_ec_write(i, v))
5840                                 return -EIO;
5841                 } else
5842                         return -EINVAL;
5843         }
5844
5845         return 0;
5846 }
5847
5848 static struct ibm_struct ecdump_driver_data = {
5849         .name = "ecdump",
5850         .read = ecdump_read,
5851         .write = ecdump_write,
5852         .flags.experimental = 1,
5853 };
5854
5855 /*************************************************************************
5856  * Backlight/brightness subdriver
5857  */
5858
5859 #define TPACPI_BACKLIGHT_DEV_NAME "thinkpad_screen"
5860
5861 /*
5862  * ThinkPads can read brightness from two places: EC HBRV (0x31), or
5863  * CMOS NVRAM byte 0x5E, bits 0-3.
5864  *
5865  * EC HBRV (0x31) has the following layout
5866  *   Bit 7: unknown function
5867  *   Bit 6: unknown function
5868  *   Bit 5: Z: honour scale changes, NZ: ignore scale changes
5869  *   Bit 4: must be set to zero to avoid problems
5870  *   Bit 3-0: backlight brightness level
5871  *
5872  * brightness_get_raw returns status data in the HBRV layout
5873  *
5874  * WARNING: The X61 has been verified to use HBRV for something else, so
5875  * this should be used _only_ on IBM ThinkPads, and maybe with some careful
5876  * testing on the very early *60 Lenovo models...
5877  */
5878
5879 enum {
5880         TP_EC_BACKLIGHT = 0x31,
5881
5882         /* TP_EC_BACKLIGHT bitmasks */
5883         TP_EC_BACKLIGHT_LVLMSK = 0x1F,
5884         TP_EC_BACKLIGHT_CMDMSK = 0xE0,
5885         TP_EC_BACKLIGHT_MAPSW = 0x20,
5886 };
5887
5888 enum tpacpi_brightness_access_mode {
5889         TPACPI_BRGHT_MODE_AUTO = 0,     /* Not implemented yet */
5890         TPACPI_BRGHT_MODE_EC,           /* EC control */
5891         TPACPI_BRGHT_MODE_UCMS_STEP,    /* UCMS step-based control */
5892         TPACPI_BRGHT_MODE_ECNVRAM,      /* EC control w/ NVRAM store */
5893         TPACPI_BRGHT_MODE_MAX
5894 };
5895
5896 static struct backlight_device *ibm_backlight_device;
5897
5898 static enum tpacpi_brightness_access_mode brightness_mode =
5899                 TPACPI_BRGHT_MODE_MAX;
5900
5901 static unsigned int brightness_enable = 2; /* 2 = auto, 0 = no, 1 = yes */
5902
5903 static struct mutex brightness_mutex;
5904
5905 /* NVRAM brightness access,
5906  * call with brightness_mutex held! */
5907 static unsigned int tpacpi_brightness_nvram_get(void)
5908 {
5909         u8 lnvram;
5910
5911         lnvram = (nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS)
5912                   & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
5913                   >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
5914         lnvram &= (tp_features.bright_16levels) ? 0x0f : 0x07;
5915
5916         return lnvram;
5917 }
5918
5919 static void tpacpi_brightness_checkpoint_nvram(void)
5920 {
5921         u8 lec = 0;
5922         u8 b_nvram;
5923
5924         if (brightness_mode != TPACPI_BRGHT_MODE_ECNVRAM)
5925                 return;
5926
5927         vdbg_printk(TPACPI_DBG_BRGHT,
5928                 "trying to checkpoint backlight level to NVRAM...\n");
5929
5930         if (mutex_lock_killable(&brightness_mutex) < 0)
5931                 return;
5932
5933         if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
5934                 goto unlock;
5935         lec &= TP_EC_BACKLIGHT_LVLMSK;
5936         b_nvram = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS);
5937
5938         if (lec != ((b_nvram & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
5939                              >> TP_NVRAM_POS_LEVEL_BRIGHTNESS)) {
5940                 /* NVRAM needs update */
5941                 b_nvram &= ~(TP_NVRAM_MASK_LEVEL_BRIGHTNESS <<
5942                                 TP_NVRAM_POS_LEVEL_BRIGHTNESS);
5943                 b_nvram |= lec;
5944                 nvram_write_byte(b_nvram, TP_NVRAM_ADDR_BRIGHTNESS);
5945                 dbg_printk(TPACPI_DBG_BRGHT,
5946                            "updated NVRAM backlight level to %u (0x%02x)\n",
5947                            (unsigned int) lec, (unsigned int) b_nvram);
5948         } else
5949                 vdbg_printk(TPACPI_DBG_BRGHT,
5950                            "NVRAM backlight level already is %u (0x%02x)\n",
5951                            (unsigned int) lec, (unsigned int) b_nvram);
5952
5953 unlock:
5954         mutex_unlock(&brightness_mutex);
5955 }
5956
5957
5958 /* call with brightness_mutex held! */
5959 static int tpacpi_brightness_get_raw(int *status)
5960 {
5961         u8 lec = 0;
5962
5963         switch (brightness_mode) {
5964         case TPACPI_BRGHT_MODE_UCMS_STEP:
5965                 *status = tpacpi_brightness_nvram_get();
5966                 return 0;
5967         case TPACPI_BRGHT_MODE_EC:
5968         case TPACPI_BRGHT_MODE_ECNVRAM:
5969                 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
5970                         return -EIO;
5971                 *status = lec;
5972                 return 0;
5973         default:
5974                 return -ENXIO;
5975         }
5976 }
5977
5978 /* call with brightness_mutex held! */
5979 /* do NOT call with illegal backlight level value */
5980 static int tpacpi_brightness_set_ec(unsigned int value)
5981 {
5982         u8 lec = 0;
5983
5984         if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
5985                 return -EIO;
5986
5987         if (unlikely(!acpi_ec_write(TP_EC_BACKLIGHT,
5988                                 (lec & TP_EC_BACKLIGHT_CMDMSK) |
5989                                 (value & TP_EC_BACKLIGHT_LVLMSK))))
5990                 return -EIO;
5991
5992         return 0;
5993 }
5994
5995 /* call with brightness_mutex held! */
5996 static int tpacpi_brightness_set_ucmsstep(unsigned int value)
5997 {
5998         int cmos_cmd, inc;
5999         unsigned int current_value, i;
6000
6001         current_value = tpacpi_brightness_nvram_get();
6002
6003         if (value == current_value)
6004                 return 0;
6005
6006         cmos_cmd = (value > current_value) ?
6007                         TP_CMOS_BRIGHTNESS_UP :
6008                         TP_CMOS_BRIGHTNESS_DOWN;
6009         inc = (value > current_value) ? 1 : -1;
6010
6011         for (i = current_value; i != value; i += inc)
6012                 if (issue_thinkpad_cmos_command(cmos_cmd))
6013                         return -EIO;
6014
6015         return 0;
6016 }
6017
6018 /* May return EINTR which can always be mapped to ERESTARTSYS */
6019 static int brightness_set(unsigned int value)
6020 {
6021         int res;
6022
6023         if (value > ((tp_features.bright_16levels)? 15 : 7) ||
6024             value < 0)
6025                 return -EINVAL;
6026
6027         vdbg_printk(TPACPI_DBG_BRGHT,
6028                         "set backlight level to %d\n", value);
6029
6030         res = mutex_lock_killable(&brightness_mutex);
6031         if (res < 0)
6032                 return res;
6033
6034         switch (brightness_mode) {
6035         case TPACPI_BRGHT_MODE_EC:
6036         case TPACPI_BRGHT_MODE_ECNVRAM:
6037                 res = tpacpi_brightness_set_ec(value);
6038                 break;
6039         case TPACPI_BRGHT_MODE_UCMS_STEP:
6040                 res = tpacpi_brightness_set_ucmsstep(value);
6041                 break;
6042         default:
6043                 res = -ENXIO;
6044         }
6045
6046         mutex_unlock(&brightness_mutex);
6047         return res;
6048 }
6049
6050 /* sysfs backlight class ----------------------------------------------- */
6051
6052 static int brightness_update_status(struct backlight_device *bd)
6053 {
6054         unsigned int level =
6055                 (bd->props.fb_blank == FB_BLANK_UNBLANK &&
6056                  bd->props.power == FB_BLANK_UNBLANK) ?
6057                                 bd->props.brightness : 0;
6058
6059         dbg_printk(TPACPI_DBG_BRGHT,
6060                         "backlight: attempt to set level to %d\n",
6061                         level);
6062
6063         /* it is the backlight class's job (caller) to handle
6064          * EINTR and other errors properly */
6065         return brightness_set(level);
6066 }
6067
6068 static int brightness_get(struct backlight_device *bd)
6069 {
6070         int status, res;
6071
6072         res = mutex_lock_killable(&brightness_mutex);
6073         if (res < 0)
6074                 return 0;
6075
6076         res = tpacpi_brightness_get_raw(&status);
6077
6078         mutex_unlock(&brightness_mutex);
6079
6080         if (res < 0)
6081                 return 0;
6082
6083         return status & TP_EC_BACKLIGHT_LVLMSK;
6084 }
6085
6086 static struct backlight_ops ibm_backlight_data = {
6087         .get_brightness = brightness_get,
6088         .update_status  = brightness_update_status,
6089 };
6090
6091 /* --------------------------------------------------------------------- */
6092
6093 /*
6094  * These are only useful for models that have only one possibility
6095  * of GPU.  If the BIOS model handles both ATI and Intel, don't use
6096  * these quirks.
6097  */
6098 #define TPACPI_BRGHT_Q_NOEC     0x0001  /* Must NOT use EC HBRV */
6099 #define TPACPI_BRGHT_Q_EC       0x0002  /* Should or must use EC HBRV */
6100 #define TPACPI_BRGHT_Q_ASK      0x8000  /* Ask for user report */
6101
6102 static const struct tpacpi_quirk brightness_quirk_table[] __initconst = {
6103         /* Models with ATI GPUs known to require ECNVRAM mode */
6104         TPACPI_Q_IBM('1', 'Y', TPACPI_BRGHT_Q_EC),      /* T43/p ATI */
6105
6106         /* Models with ATI GPUs that can use ECNVRAM */
6107         TPACPI_Q_IBM('1', 'R', TPACPI_BRGHT_Q_EC),
6108         TPACPI_Q_IBM('1', 'Q', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
6109         TPACPI_Q_IBM('7', '6', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
6110         TPACPI_Q_IBM('7', '8', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
6111
6112         /* Models with Intel Extreme Graphics 2 */
6113         TPACPI_Q_IBM('1', 'U', TPACPI_BRGHT_Q_NOEC),
6114         TPACPI_Q_IBM('1', 'V', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_NOEC),
6115         TPACPI_Q_IBM('1', 'W', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_NOEC),
6116
6117         /* Models with Intel GMA900 */
6118         TPACPI_Q_IBM('7', '0', TPACPI_BRGHT_Q_NOEC),    /* T43, R52 */
6119         TPACPI_Q_IBM('7', '4', TPACPI_BRGHT_Q_NOEC),    /* X41 */
6120         TPACPI_Q_IBM('7', '5', TPACPI_BRGHT_Q_NOEC),    /* X41 Tablet */
6121 };
6122
6123 static int __init brightness_init(struct ibm_init_struct *iibm)
6124 {
6125         int b;
6126         unsigned long quirks;
6127
6128         vdbg_printk(TPACPI_DBG_INIT, "initializing brightness subdriver\n");
6129
6130         mutex_init(&brightness_mutex);
6131
6132         quirks = tpacpi_check_quirks(brightness_quirk_table,
6133                                 ARRAY_SIZE(brightness_quirk_table));
6134
6135         /*
6136          * We always attempt to detect acpi support, so as to switch
6137          * Lenovo Vista BIOS to ACPI brightness mode even if we are not
6138          * going to publish a backlight interface
6139          */
6140         b = tpacpi_check_std_acpi_brightness_support();
6141         if (b > 0) {
6142
6143                 if (acpi_video_backlight_support()) {
6144                         if (brightness_enable > 1) {
6145                                 printk(TPACPI_NOTICE
6146                                        "Standard ACPI backlight interface "
6147                                        "available, not loading native one.\n");
6148                                 return 1;
6149                         } else if (brightness_enable == 1) {
6150                                 printk(TPACPI_NOTICE
6151                                        "Backlight control force enabled, even if standard "
6152                                        "ACPI backlight interface is available\n");
6153                         }
6154                 } else {
6155                         if (brightness_enable > 1) {
6156                                 printk(TPACPI_NOTICE
6157                                        "Standard ACPI backlight interface not "
6158                                        "available, thinkpad_acpi native "
6159                                        "brightness control enabled\n");
6160                         }
6161                 }
6162         }
6163
6164         if (!brightness_enable) {
6165                 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT,
6166                            "brightness support disabled by "
6167                            "module parameter\n");
6168                 return 1;
6169         }
6170
6171         if (b > 16) {
6172                 printk(TPACPI_ERR
6173                        "Unsupported brightness interface, "
6174                        "please contact %s\n", TPACPI_MAIL);
6175                 return 1;
6176         }
6177         if (b == 16)
6178                 tp_features.bright_16levels = 1;
6179
6180         /*
6181          * Check for module parameter bogosity, note that we
6182          * init brightness_mode to TPACPI_BRGHT_MODE_MAX in order to be
6183          * able to detect "unspecified"
6184          */
6185         if (brightness_mode > TPACPI_BRGHT_MODE_MAX)
6186                 return -EINVAL;
6187
6188         /* TPACPI_BRGHT_MODE_AUTO not implemented yet, just use default */
6189         if (brightness_mode == TPACPI_BRGHT_MODE_AUTO ||
6190             brightness_mode == TPACPI_BRGHT_MODE_MAX) {
6191                 if (quirks & TPACPI_BRGHT_Q_EC)
6192                         brightness_mode = TPACPI_BRGHT_MODE_ECNVRAM;
6193                 else
6194                         brightness_mode = TPACPI_BRGHT_MODE_UCMS_STEP;
6195
6196                 dbg_printk(TPACPI_DBG_BRGHT,
6197                            "driver auto-selected brightness_mode=%d\n",
6198                            brightness_mode);
6199         }
6200
6201         /* Safety */
6202         if (thinkpad_id.vendor != PCI_VENDOR_ID_IBM &&
6203             (brightness_mode == TPACPI_BRGHT_MODE_ECNVRAM ||
6204              brightness_mode == TPACPI_BRGHT_MODE_EC))
6205                 return -EINVAL;
6206
6207         if (tpacpi_brightness_get_raw(&b) < 0)
6208                 return 1;
6209
6210         if (tp_features.bright_16levels)
6211                 printk(TPACPI_INFO
6212                        "detected a 16-level brightness capable ThinkPad\n");
6213
6214         ibm_backlight_device = backlight_device_register(
6215                                         TPACPI_BACKLIGHT_DEV_NAME, NULL, NULL,
6216                                         &ibm_backlight_data);
6217         if (IS_ERR(ibm_backlight_device)) {
6218                 int rc = PTR_ERR(ibm_backlight_device);
6219                 ibm_backlight_device = NULL;
6220                 printk(TPACPI_ERR "Could not register backlight device\n");
6221                 return rc;
6222         }
6223         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT,
6224                         "brightness is supported\n");
6225
6226         if (quirks & TPACPI_BRGHT_Q_ASK) {
6227                 printk(TPACPI_NOTICE
6228                         "brightness: will use unverified default: "
6229                         "brightness_mode=%d\n", brightness_mode);
6230                 printk(TPACPI_NOTICE
6231                         "brightness: please report to %s whether it works well "
6232                         "or not on your ThinkPad\n", TPACPI_MAIL);
6233         }
6234
6235         ibm_backlight_device->props.max_brightness =
6236                                 (tp_features.bright_16levels)? 15 : 7;
6237         ibm_backlight_device->props.brightness = b & TP_EC_BACKLIGHT_LVLMSK;
6238         backlight_update_status(ibm_backlight_device);
6239
6240         return 0;
6241 }
6242
6243 static void brightness_suspend(pm_message_t state)
6244 {
6245         tpacpi_brightness_checkpoint_nvram();
6246 }
6247
6248 static void brightness_shutdown(void)
6249 {
6250         tpacpi_brightness_checkpoint_nvram();
6251 }
6252
6253 static void brightness_exit(void)
6254 {
6255         if (ibm_backlight_device) {
6256                 vdbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_BRGHT,
6257                             "calling backlight_device_unregister()\n");
6258                 backlight_device_unregister(ibm_backlight_device);
6259         }
6260
6261         tpacpi_brightness_checkpoint_nvram();
6262 }
6263
6264 static int brightness_read(char