thinkpad-acpi: adopt input device
[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 0x020600
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                 __eid, __ev1, __ev2)                    \
1684         { .vendor       = (__v),                        \
1685           .bios         = TPID(__bid1, __bid2),         \
1686           .ec           = __eid,                        \
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 /* Outdated IBM BIOSes often lack the EC id string */
1694 #define TPV_QI1(__id1, __id2, __bv1, __bv2, __ev1, __ev2) \
1695         TPV_Q_X(PCI_VENDOR_ID_IBM, __id1, __id2,        \
1696                 __bv1, __bv2, TPID(__id1, __id2),       \
1697                 __ev1, __ev2),                          \
1698         TPV_Q_X(PCI_VENDOR_ID_IBM, __id1, __id2,        \
1699                 __bv1, __bv2, TPACPI_MATCH_UNKNOWN,     \
1700                 __ev1, __ev2)
1701
1702 /* Outdated IBM BIOSes often lack the EC id string */
1703 #define TPV_QI2(__bid1, __bid2, __bv1, __bv2,           \
1704                 __eid1, __eid2, __ev1, __ev2)           \
1705         TPV_Q_X(PCI_VENDOR_ID_IBM, __bid1, __bid2,      \
1706                 __bv1, __bv2, TPID(__eid1, __eid2),     \
1707                 __ev1, __ev2),                          \
1708         TPV_Q_X(PCI_VENDOR_ID_IBM, __bid1, __bid2,      \
1709                 __bv1, __bv2, TPACPI_MATCH_UNKNOWN,     \
1710                 __ev1, __ev2)
1711
1712 #define TPV_QL0(__id1, __id2, __bv1, __bv2) \
1713         TPV_Q(PCI_VENDOR_ID_LENOVO, __id1, __id2, __bv1, __bv2)
1714
1715 #define TPV_QL1(__id1, __id2, __bv1, __bv2, __ev1, __ev2) \
1716         TPV_Q_X(PCI_VENDOR_ID_LENOVO, __id1, __id2,     \
1717                 __bv1, __bv2, TPID(__id1, __id2),       \
1718                 __ev1, __ev2)
1719
1720 #define TPV_QL2(__bid1, __bid2, __bv1, __bv2,           \
1721                 __eid1, __eid2, __ev1, __ev2)           \
1722         TPV_Q_X(PCI_VENDOR_ID_LENOVO, __bid1, __bid2,   \
1723                 __bv1, __bv2, TPID(__eid1, __eid2),     \
1724                 __ev1, __ev2)
1725
1726 static const struct tpacpi_quirk tpacpi_bios_version_qtable[] __initconst = {
1727         /*  Numeric models ------------------ */
1728         /*      FW MODEL   BIOS VERS          */
1729         TPV_QI0('I', 'M',  '6', '5'),            /* 570 */
1730         TPV_QI0('I', 'U',  '2', '6'),            /* 570E */
1731         TPV_QI0('I', 'B',  '5', '4'),            /* 600 */
1732         TPV_QI0('I', 'H',  '4', '7'),            /* 600E */
1733         TPV_QI0('I', 'N',  '3', '6'),            /* 600E */
1734         TPV_QI0('I', 'T',  '5', '5'),            /* 600X */
1735         TPV_QI0('I', 'D',  '4', '8'),            /* 770, 770E, 770ED */
1736         TPV_QI0('I', 'I',  '4', '2'),            /* 770X */
1737         TPV_QI0('I', 'O',  '2', '3'),            /* 770Z */
1738
1739         /* A-series ------------------------- */
1740         /*      FW MODEL   BIOS VERS  EC VERS */
1741         TPV_QI0('I', 'W',  '5', '9'),            /* A20m */
1742         TPV_QI0('I', 'V',  '6', '9'),            /* A20p */
1743         TPV_QI0('1', '0',  '2', '6'),            /* A21e, A22e */
1744         TPV_QI0('K', 'U',  '3', '6'),            /* A21e */
1745         TPV_QI0('K', 'X',  '3', '6'),            /* A21m, A22m */
1746         TPV_QI0('K', 'Y',  '3', '8'),            /* A21p, A22p */
1747         TPV_QI0('1', 'B',  '1', '7'),            /* A22e */
1748         TPV_QI0('1', '3',  '2', '0'),            /* A22m */
1749         TPV_QI0('1', 'E',  '7', '3'),            /* A30/p (0) */
1750         TPV_QI1('1', 'G',  '4', '1',  '1', '7'), /* A31/p (0) */
1751         TPV_QI1('1', 'N',  '1', '6',  '0', '7'), /* A31/p (0) */
1752
1753         /* G-series ------------------------- */
1754         /*      FW MODEL   BIOS VERS          */
1755         TPV_QI0('1', 'T',  'A', '6'),            /* G40 */
1756         TPV_QI0('1', 'X',  '5', '7'),            /* G41 */
1757
1758         /* R-series, T-series --------------- */
1759         /*      FW MODEL   BIOS VERS  EC VERS */
1760         TPV_QI0('1', 'C',  'F', '0'),            /* R30 */
1761         TPV_QI0('1', 'F',  'F', '1'),            /* R31 */
1762         TPV_QI0('1', 'M',  '9', '7'),            /* R32 */
1763         TPV_QI0('1', 'O',  '6', '1'),            /* R40 */
1764         TPV_QI0('1', 'P',  '6', '5'),            /* R40 */
1765         TPV_QI0('1', 'S',  '7', '0'),            /* R40e */
1766         TPV_QI1('1', 'R',  'D', 'R',  '7', '1'), /* R50/p, R51,
1767                                                     T40/p, T41/p, T42/p (1) */
1768         TPV_QI1('1', 'V',  '7', '1',  '2', '8'), /* R50e, R51 (1) */
1769         TPV_QI1('7', '8',  '7', '1',  '0', '6'), /* R51e (1) */
1770         TPV_QI1('7', '6',  '6', '9',  '1', '6'), /* R52 (1) */
1771         TPV_QI1('7', '0',  '6', '9',  '2', '8'), /* R52, T43 (1) */
1772
1773         TPV_QI0('I', 'Y',  '6', '1'),            /* T20 */
1774         TPV_QI0('K', 'Z',  '3', '4'),            /* T21 */
1775         TPV_QI0('1', '6',  '3', '2'),            /* T22 */
1776         TPV_QI1('1', 'A',  '6', '4',  '2', '3'), /* T23 (0) */
1777         TPV_QI1('1', 'I',  '7', '1',  '2', '0'), /* T30 (0) */
1778         TPV_QI1('1', 'Y',  '6', '5',  '2', '9'), /* T43/p (1) */
1779
1780         TPV_QL1('7', '9',  'E', '3',  '5', '0'), /* T60/p */
1781         TPV_QL1('7', 'C',  'D', '2',  '2', '2'), /* R60, R60i */
1782         TPV_QL1('7', 'E',  'D', '0',  '1', '5'), /* R60e, R60i */
1783
1784         /*      BIOS FW    BIOS VERS  EC FW     EC VERS */
1785         TPV_QI2('1', 'W',  '9', '0',  '1', 'V', '2', '8'), /* R50e (1) */
1786         TPV_QL2('7', 'I',  '3', '4',  '7', '9', '5', '0'), /* T60/p wide */
1787
1788         /* X-series ------------------------- */
1789         /*      FW MODEL   BIOS VERS  EC VERS */
1790         TPV_QI0('I', 'Z',  '9', 'D'),            /* X20, X21 */
1791         TPV_QI0('1', 'D',  '7', '0'),            /* X22, X23, X24 */
1792         TPV_QI1('1', 'K',  '4', '8',  '1', '8'), /* X30 (0) */
1793         TPV_QI1('1', 'Q',  '9', '7',  '2', '3'), /* X31, X32 (0) */
1794         TPV_QI1('1', 'U',  'D', '3',  'B', '2'), /* X40 (0) */
1795         TPV_QI1('7', '4',  '6', '4',  '2', '7'), /* X41 (0) */
1796         TPV_QI1('7', '5',  '6', '0',  '2', '0'), /* X41t (0) */
1797
1798         TPV_QL1('7', 'B',  'D', '7',  '4', '0'), /* X60/s */
1799         TPV_QL1('7', 'J',  '3', '0',  '1', '3'), /* X60t */
1800
1801         /* (0) - older versions lack DMI EC fw string and functionality */
1802         /* (1) - older versions known to lack functionality */
1803 };
1804
1805 #undef TPV_QL1
1806 #undef TPV_QL0
1807 #undef TPV_QI2
1808 #undef TPV_QI1
1809 #undef TPV_QI0
1810 #undef TPV_Q_X
1811 #undef TPV_Q
1812
1813 static void __init tpacpi_check_outdated_fw(void)
1814 {
1815         unsigned long fwvers;
1816         u16 ec_version, bios_version;
1817
1818         fwvers = tpacpi_check_quirks(tpacpi_bios_version_qtable,
1819                                 ARRAY_SIZE(tpacpi_bios_version_qtable));
1820
1821         if (!fwvers)
1822                 return;
1823
1824         bios_version = fwvers & 0xffffU;
1825         ec_version = (fwvers >> 16) & 0xffffU;
1826
1827         /* note that unknown versions are set to 0x0000 and we use that */
1828         if ((bios_version > thinkpad_id.bios_release) ||
1829             (ec_version > thinkpad_id.ec_release &&
1830                                 ec_version != TPACPI_MATCH_ANY)) {
1831                 /*
1832                  * The changelogs would let us track down the exact
1833                  * reason, but it is just too much of a pain to track
1834                  * it.  We only list BIOSes that are either really
1835                  * broken, or really stable to begin with, so it is
1836                  * best if the user upgrades the firmware anyway.
1837                  */
1838                 printk(TPACPI_WARN
1839                         "WARNING: Outdated ThinkPad BIOS/EC firmware\n");
1840                 printk(TPACPI_WARN
1841                         "WARNING: This firmware may be missing critical bug "
1842                         "fixes and/or important features\n");
1843         }
1844 }
1845
1846 static bool __init tpacpi_is_fw_known(void)
1847 {
1848         return tpacpi_check_quirks(tpacpi_bios_version_qtable,
1849                         ARRAY_SIZE(tpacpi_bios_version_qtable)) != 0;
1850 }
1851
1852 /****************************************************************************
1853  ****************************************************************************
1854  *
1855  * Subdrivers
1856  *
1857  ****************************************************************************
1858  ****************************************************************************/
1859
1860 /*************************************************************************
1861  * thinkpad-acpi init subdriver
1862  */
1863
1864 static int __init thinkpad_acpi_driver_init(struct ibm_init_struct *iibm)
1865 {
1866         printk(TPACPI_INFO "%s v%s\n", TPACPI_DESC, TPACPI_VERSION);
1867         printk(TPACPI_INFO "%s\n", TPACPI_URL);
1868
1869         printk(TPACPI_INFO "ThinkPad BIOS %s, EC %s\n",
1870                 (thinkpad_id.bios_version_str) ?
1871                         thinkpad_id.bios_version_str : "unknown",
1872                 (thinkpad_id.ec_version_str) ?
1873                         thinkpad_id.ec_version_str : "unknown");
1874
1875         if (thinkpad_id.vendor && thinkpad_id.model_str)
1876                 printk(TPACPI_INFO "%s %s, model %s\n",
1877                         (thinkpad_id.vendor == PCI_VENDOR_ID_IBM) ?
1878                                 "IBM" : ((thinkpad_id.vendor ==
1879                                                 PCI_VENDOR_ID_LENOVO) ?
1880                                         "Lenovo" : "Unknown vendor"),
1881                         thinkpad_id.model_str,
1882                         (thinkpad_id.nummodel_str) ?
1883                                 thinkpad_id.nummodel_str : "unknown");
1884
1885         tpacpi_check_outdated_fw();
1886         return 0;
1887 }
1888
1889 static int thinkpad_acpi_driver_read(char *p)
1890 {
1891         int len = 0;
1892
1893         len += sprintf(p + len, "driver:\t\t%s\n", TPACPI_DESC);
1894         len += sprintf(p + len, "version:\t%s\n", TPACPI_VERSION);
1895
1896         return len;
1897 }
1898
1899 static struct ibm_struct thinkpad_acpi_driver_data = {
1900         .name = "driver",
1901         .read = thinkpad_acpi_driver_read,
1902 };
1903
1904 /*************************************************************************
1905  * Hotkey subdriver
1906  */
1907
1908 /*
1909  * ThinkPad firmware event model
1910  *
1911  * The ThinkPad firmware has two main event interfaces: normal ACPI
1912  * notifications (which follow the ACPI standard), and a private event
1913  * interface.
1914  *
1915  * The private event interface also issues events for the hotkeys.  As
1916  * the driver gained features, the event handling code ended up being
1917  * built around the hotkey subdriver.  This will need to be refactored
1918  * to a more formal event API eventually.
1919  *
1920  * Some "hotkeys" are actually supposed to be used as event reports,
1921  * such as "brightness has changed", "volume has changed", depending on
1922  * the ThinkPad model and how the firmware is operating.
1923  *
1924  * Unlike other classes, hotkey-class events have mask/unmask control on
1925  * non-ancient firmware.  However, how it behaves changes a lot with the
1926  * firmware model and version.
1927  */
1928
1929 enum {  /* hot key scan codes (derived from ACPI DSDT) */
1930         TP_ACPI_HOTKEYSCAN_FNF1         = 0,
1931         TP_ACPI_HOTKEYSCAN_FNF2,
1932         TP_ACPI_HOTKEYSCAN_FNF3,
1933         TP_ACPI_HOTKEYSCAN_FNF4,
1934         TP_ACPI_HOTKEYSCAN_FNF5,
1935         TP_ACPI_HOTKEYSCAN_FNF6,
1936         TP_ACPI_HOTKEYSCAN_FNF7,
1937         TP_ACPI_HOTKEYSCAN_FNF8,
1938         TP_ACPI_HOTKEYSCAN_FNF9,
1939         TP_ACPI_HOTKEYSCAN_FNF10,
1940         TP_ACPI_HOTKEYSCAN_FNF11,
1941         TP_ACPI_HOTKEYSCAN_FNF12,
1942         TP_ACPI_HOTKEYSCAN_FNBACKSPACE,
1943         TP_ACPI_HOTKEYSCAN_FNINSERT,
1944         TP_ACPI_HOTKEYSCAN_FNDELETE,
1945         TP_ACPI_HOTKEYSCAN_FNHOME,
1946         TP_ACPI_HOTKEYSCAN_FNEND,
1947         TP_ACPI_HOTKEYSCAN_FNPAGEUP,
1948         TP_ACPI_HOTKEYSCAN_FNPAGEDOWN,
1949         TP_ACPI_HOTKEYSCAN_FNSPACE,
1950         TP_ACPI_HOTKEYSCAN_VOLUMEUP,
1951         TP_ACPI_HOTKEYSCAN_VOLUMEDOWN,
1952         TP_ACPI_HOTKEYSCAN_MUTE,
1953         TP_ACPI_HOTKEYSCAN_THINKPAD,
1954 };
1955
1956 enum {  /* Keys/events available through NVRAM polling */
1957         TPACPI_HKEY_NVRAM_KNOWN_MASK = 0x00fb88c0U,
1958         TPACPI_HKEY_NVRAM_GOOD_MASK  = 0x00fb8000U,
1959 };
1960
1961 enum {  /* Positions of some of the keys in hotkey masks */
1962         TP_ACPI_HKEY_DISPSWTCH_MASK     = 1 << TP_ACPI_HOTKEYSCAN_FNF7,
1963         TP_ACPI_HKEY_DISPXPAND_MASK     = 1 << TP_ACPI_HOTKEYSCAN_FNF8,
1964         TP_ACPI_HKEY_HIBERNATE_MASK     = 1 << TP_ACPI_HOTKEYSCAN_FNF12,
1965         TP_ACPI_HKEY_BRGHTUP_MASK       = 1 << TP_ACPI_HOTKEYSCAN_FNHOME,
1966         TP_ACPI_HKEY_BRGHTDWN_MASK      = 1 << TP_ACPI_HOTKEYSCAN_FNEND,
1967         TP_ACPI_HKEY_THNKLGHT_MASK      = 1 << TP_ACPI_HOTKEYSCAN_FNPAGEUP,
1968         TP_ACPI_HKEY_ZOOM_MASK          = 1 << TP_ACPI_HOTKEYSCAN_FNSPACE,
1969         TP_ACPI_HKEY_VOLUP_MASK         = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEUP,
1970         TP_ACPI_HKEY_VOLDWN_MASK        = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEDOWN,
1971         TP_ACPI_HKEY_MUTE_MASK          = 1 << TP_ACPI_HOTKEYSCAN_MUTE,
1972         TP_ACPI_HKEY_THINKPAD_MASK      = 1 << TP_ACPI_HOTKEYSCAN_THINKPAD,
1973 };
1974
1975 enum {  /* NVRAM to ACPI HKEY group map */
1976         TP_NVRAM_HKEY_GROUP_HK2         = TP_ACPI_HKEY_THINKPAD_MASK |
1977                                           TP_ACPI_HKEY_ZOOM_MASK |
1978                                           TP_ACPI_HKEY_DISPSWTCH_MASK |
1979                                           TP_ACPI_HKEY_HIBERNATE_MASK,
1980         TP_NVRAM_HKEY_GROUP_BRIGHTNESS  = TP_ACPI_HKEY_BRGHTUP_MASK |
1981                                           TP_ACPI_HKEY_BRGHTDWN_MASK,
1982         TP_NVRAM_HKEY_GROUP_VOLUME      = TP_ACPI_HKEY_VOLUP_MASK |
1983                                           TP_ACPI_HKEY_VOLDWN_MASK |
1984                                           TP_ACPI_HKEY_MUTE_MASK,
1985 };
1986
1987 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1988 struct tp_nvram_state {
1989        u16 thinkpad_toggle:1;
1990        u16 zoom_toggle:1;
1991        u16 display_toggle:1;
1992        u16 thinklight_toggle:1;
1993        u16 hibernate_toggle:1;
1994        u16 displayexp_toggle:1;
1995        u16 display_state:1;
1996        u16 brightness_toggle:1;
1997        u16 volume_toggle:1;
1998        u16 mute:1;
1999
2000        u8 brightness_level;
2001        u8 volume_level;
2002 };
2003
2004 /* kthread for the hotkey poller */
2005 static struct task_struct *tpacpi_hotkey_task;
2006
2007 /* Acquired while the poller kthread is running, use to sync start/stop */
2008 static struct mutex hotkey_thread_mutex;
2009
2010 /*
2011  * Acquire mutex to write poller control variables as an
2012  * atomic block.
2013  *
2014  * Increment hotkey_config_change when changing them if you
2015  * want the kthread to forget old state.
2016  *
2017  * See HOTKEY_CONFIG_CRITICAL_START/HOTKEY_CONFIG_CRITICAL_END
2018  */
2019 static struct mutex hotkey_thread_data_mutex;
2020 static unsigned int hotkey_config_change;
2021
2022 /*
2023  * hotkey poller control variables
2024  *
2025  * Must be atomic or readers will also need to acquire mutex
2026  *
2027  * HOTKEY_CONFIG_CRITICAL_START/HOTKEY_CONFIG_CRITICAL_END
2028  * should be used only when the changes need to be taken as
2029  * a block, OR when one needs to force the kthread to forget
2030  * old state.
2031  */
2032 static u32 hotkey_source_mask;          /* bit mask 0=ACPI,1=NVRAM */
2033 static unsigned int hotkey_poll_freq = 10; /* Hz */
2034
2035 #define HOTKEY_CONFIG_CRITICAL_START \
2036         do { \
2037                 mutex_lock(&hotkey_thread_data_mutex); \
2038                 hotkey_config_change++; \
2039         } while (0);
2040 #define HOTKEY_CONFIG_CRITICAL_END \
2041         mutex_unlock(&hotkey_thread_data_mutex);
2042
2043 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2044
2045 #define hotkey_source_mask 0U
2046 #define HOTKEY_CONFIG_CRITICAL_START
2047 #define HOTKEY_CONFIG_CRITICAL_END
2048
2049 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2050
2051 static struct mutex hotkey_mutex;
2052
2053 static enum {   /* Reasons for waking up */
2054         TP_ACPI_WAKEUP_NONE = 0,        /* None or unknown */
2055         TP_ACPI_WAKEUP_BAYEJ,           /* Bay ejection request */
2056         TP_ACPI_WAKEUP_UNDOCK,          /* Undock request */
2057 } hotkey_wakeup_reason;
2058
2059 static int hotkey_autosleep_ack;
2060
2061 static u32 hotkey_orig_mask;            /* events the BIOS had enabled */
2062 static u32 hotkey_all_mask;             /* all events supported in fw */
2063 static u32 hotkey_reserved_mask;        /* events better left disabled */
2064 static u32 hotkey_driver_mask;          /* events needed by the driver */
2065 static u32 hotkey_user_mask;            /* events visible to userspace */
2066 static u32 hotkey_acpi_mask;            /* events enabled in firmware */
2067
2068 static unsigned int hotkey_report_mode;
2069
2070 static u16 *hotkey_keycode_map;
2071
2072 static struct attribute_set *hotkey_dev_attributes;
2073
2074 static void tpacpi_driver_event(const unsigned int hkey_event);
2075 static void hotkey_driver_event(const unsigned int scancode);
2076
2077 /* HKEY.MHKG() return bits */
2078 #define TP_HOTKEY_TABLET_MASK (1 << 3)
2079
2080 static int hotkey_get_wlsw(void)
2081 {
2082         int status;
2083
2084         if (!tp_features.hotkey_wlsw)
2085                 return -ENODEV;
2086
2087 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
2088         if (dbg_wlswemul)
2089                 return (tpacpi_wlsw_emulstate) ?
2090                                 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
2091 #endif
2092
2093         if (!acpi_evalf(hkey_handle, &status, "WLSW", "d"))
2094                 return -EIO;
2095
2096         return (status) ? TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
2097 }
2098
2099 static int hotkey_get_tablet_mode(int *status)
2100 {
2101         int s;
2102
2103         if (!acpi_evalf(hkey_handle, &s, "MHKG", "d"))
2104                 return -EIO;
2105
2106         *status = ((s & TP_HOTKEY_TABLET_MASK) != 0);
2107         return 0;
2108 }
2109
2110 /*
2111  * Reads current event mask from firmware, and updates
2112  * hotkey_acpi_mask accordingly.  Also resets any bits
2113  * from hotkey_user_mask that are unavailable to be
2114  * delivered (shadow requirement of the userspace ABI).
2115  *
2116  * Call with hotkey_mutex held
2117  */
2118 static int hotkey_mask_get(void)
2119 {
2120         if (tp_features.hotkey_mask) {
2121                 u32 m = 0;
2122
2123                 if (!acpi_evalf(hkey_handle, &m, "DHKN", "d"))
2124                         return -EIO;
2125
2126                 hotkey_acpi_mask = m;
2127         } else {
2128                 /* no mask support doesn't mean no event support... */
2129                 hotkey_acpi_mask = hotkey_all_mask;
2130         }
2131
2132         /* sync userspace-visible mask */
2133         hotkey_user_mask &= (hotkey_acpi_mask | hotkey_source_mask);
2134
2135         return 0;
2136 }
2137
2138 void static hotkey_mask_warn_incomplete_mask(void)
2139 {
2140         /* log only what the user can fix... */
2141         const u32 wantedmask = hotkey_driver_mask &
2142                 ~(hotkey_acpi_mask | hotkey_source_mask) &
2143                 (hotkey_all_mask | TPACPI_HKEY_NVRAM_KNOWN_MASK);
2144
2145         if (wantedmask)
2146                 printk(TPACPI_NOTICE
2147                         "required events 0x%08x not enabled!\n",
2148                         wantedmask);
2149 }
2150
2151 /*
2152  * Set the firmware mask when supported
2153  *
2154  * Also calls hotkey_mask_get to update hotkey_acpi_mask.
2155  *
2156  * NOTE: does not set bits in hotkey_user_mask, but may reset them.
2157  *
2158  * Call with hotkey_mutex held
2159  */
2160 static int hotkey_mask_set(u32 mask)
2161 {
2162         int i;
2163         int rc = 0;
2164
2165         const u32 fwmask = mask & ~hotkey_source_mask;
2166
2167         if (tp_features.hotkey_mask) {
2168                 for (i = 0; i < 32; i++) {
2169                         if (!acpi_evalf(hkey_handle,
2170                                         NULL, "MHKM", "vdd", i + 1,
2171                                         !!(mask & (1 << i)))) {
2172                                 rc = -EIO;
2173                                 break;
2174                         }
2175                 }
2176         }
2177
2178         /*
2179          * We *must* make an inconditional call to hotkey_mask_get to
2180          * refresh hotkey_acpi_mask and update hotkey_user_mask
2181          *
2182          * Take the opportunity to also log when we cannot _enable_
2183          * a given event.
2184          */
2185         if (!hotkey_mask_get() && !rc && (fwmask & ~hotkey_acpi_mask)) {
2186                 printk(TPACPI_NOTICE
2187                        "asked for hotkey mask 0x%08x, but "
2188                        "firmware forced it to 0x%08x\n",
2189                        fwmask, hotkey_acpi_mask);
2190         }
2191
2192         if (tpacpi_lifecycle != TPACPI_LIFE_EXITING)
2193                 hotkey_mask_warn_incomplete_mask();
2194
2195         return rc;
2196 }
2197
2198 /*
2199  * Sets hotkey_user_mask and tries to set the firmware mask
2200  *
2201  * Call with hotkey_mutex held
2202  */
2203 static int hotkey_user_mask_set(const u32 mask)
2204 {
2205         int rc;
2206
2207         /* Give people a chance to notice they are doing something that
2208          * is bound to go boom on their users sooner or later */
2209         if (!tp_warned.hotkey_mask_ff &&
2210             (mask == 0xffff || mask == 0xffffff ||
2211              mask == 0xffffffff)) {
2212                 tp_warned.hotkey_mask_ff = 1;
2213                 printk(TPACPI_NOTICE
2214                        "setting the hotkey mask to 0x%08x is likely "
2215                        "not the best way to go about it\n", mask);
2216                 printk(TPACPI_NOTICE
2217                        "please consider using the driver defaults, "
2218                        "and refer to up-to-date thinkpad-acpi "
2219                        "documentation\n");
2220         }
2221
2222         /* Try to enable what the user asked for, plus whatever we need.
2223          * this syncs everything but won't enable bits in hotkey_user_mask */
2224         rc = hotkey_mask_set((mask | hotkey_driver_mask) & ~hotkey_source_mask);
2225
2226         /* Enable the available bits in hotkey_user_mask */
2227         hotkey_user_mask = mask & (hotkey_acpi_mask | hotkey_source_mask);
2228
2229         return rc;
2230 }
2231
2232 /*
2233  * Sets the driver hotkey mask.
2234  *
2235  * Can be called even if the hotkey subdriver is inactive
2236  */
2237 static int tpacpi_hotkey_driver_mask_set(const u32 mask)
2238 {
2239         int rc;
2240
2241         /* Do the right thing if hotkey_init has not been called yet */
2242         if (!tp_features.hotkey) {
2243                 hotkey_driver_mask = mask;
2244                 return 0;
2245         }
2246
2247         mutex_lock(&hotkey_mutex);
2248
2249         HOTKEY_CONFIG_CRITICAL_START
2250         hotkey_driver_mask = mask;
2251 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2252         hotkey_source_mask |= (mask & ~hotkey_all_mask);
2253 #endif
2254         HOTKEY_CONFIG_CRITICAL_END
2255
2256         rc = hotkey_mask_set((hotkey_acpi_mask | hotkey_driver_mask) &
2257                                                         ~hotkey_source_mask);
2258         mutex_unlock(&hotkey_mutex);
2259
2260         return rc;
2261 }
2262
2263 static int hotkey_status_get(int *status)
2264 {
2265         if (!acpi_evalf(hkey_handle, status, "DHKC", "d"))
2266                 return -EIO;
2267
2268         return 0;
2269 }
2270
2271 static int hotkey_status_set(bool enable)
2272 {
2273         if (!acpi_evalf(hkey_handle, NULL, "MHKC", "vd", enable ? 1 : 0))
2274                 return -EIO;
2275
2276         return 0;
2277 }
2278
2279 static void tpacpi_input_send_tabletsw(void)
2280 {
2281         int state;
2282
2283         if (tp_features.hotkey_tablet &&
2284             !hotkey_get_tablet_mode(&state)) {
2285                 mutex_lock(&tpacpi_inputdev_send_mutex);
2286
2287                 input_report_switch(tpacpi_inputdev,
2288                                     SW_TABLET_MODE, !!state);
2289                 input_sync(tpacpi_inputdev);
2290
2291                 mutex_unlock(&tpacpi_inputdev_send_mutex);
2292         }
2293 }
2294
2295 /* Do NOT call without validating scancode first */
2296 static void tpacpi_input_send_key(const unsigned int scancode)
2297 {
2298         const unsigned int keycode = hotkey_keycode_map[scancode];
2299
2300         if (keycode != KEY_RESERVED) {
2301                 mutex_lock(&tpacpi_inputdev_send_mutex);
2302
2303                 input_report_key(tpacpi_inputdev, keycode, 1);
2304                 if (keycode == KEY_UNKNOWN)
2305                         input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN,
2306                                     scancode);
2307                 input_sync(tpacpi_inputdev);
2308
2309                 input_report_key(tpacpi_inputdev, keycode, 0);
2310                 if (keycode == KEY_UNKNOWN)
2311                         input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN,
2312                                     scancode);
2313                 input_sync(tpacpi_inputdev);
2314
2315                 mutex_unlock(&tpacpi_inputdev_send_mutex);
2316         }
2317 }
2318
2319 /* Do NOT call without validating scancode first */
2320 static void tpacpi_input_send_key_masked(const unsigned int scancode)
2321 {
2322         hotkey_driver_event(scancode);
2323         if (hotkey_user_mask & (1 << scancode))
2324                 tpacpi_input_send_key(scancode);
2325 }
2326
2327 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2328 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver;
2329
2330 /* Do NOT call without validating scancode first */
2331 static void tpacpi_hotkey_send_key(unsigned int scancode)
2332 {
2333         tpacpi_input_send_key_masked(scancode);
2334         if (hotkey_report_mode < 2) {
2335                 acpi_bus_generate_proc_event(ibm_hotkey_acpidriver.device,
2336                                 0x80, TP_HKEY_EV_HOTKEY_BASE + scancode);
2337         }
2338 }
2339
2340 static void hotkey_read_nvram(struct tp_nvram_state *n, const u32 m)
2341 {
2342         u8 d;
2343
2344         if (m & TP_NVRAM_HKEY_GROUP_HK2) {
2345                 d = nvram_read_byte(TP_NVRAM_ADDR_HK2);
2346                 n->thinkpad_toggle = !!(d & TP_NVRAM_MASK_HKT_THINKPAD);
2347                 n->zoom_toggle = !!(d & TP_NVRAM_MASK_HKT_ZOOM);
2348                 n->display_toggle = !!(d & TP_NVRAM_MASK_HKT_DISPLAY);
2349                 n->hibernate_toggle = !!(d & TP_NVRAM_MASK_HKT_HIBERNATE);
2350         }
2351         if (m & TP_ACPI_HKEY_THNKLGHT_MASK) {
2352                 d = nvram_read_byte(TP_NVRAM_ADDR_THINKLIGHT);
2353                 n->thinklight_toggle = !!(d & TP_NVRAM_MASK_THINKLIGHT);
2354         }
2355         if (m & TP_ACPI_HKEY_DISPXPAND_MASK) {
2356                 d = nvram_read_byte(TP_NVRAM_ADDR_VIDEO);
2357                 n->displayexp_toggle =
2358                                 !!(d & TP_NVRAM_MASK_HKT_DISPEXPND);
2359         }
2360         if (m & TP_NVRAM_HKEY_GROUP_BRIGHTNESS) {
2361                 d = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS);
2362                 n->brightness_level = (d & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
2363                                 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
2364                 n->brightness_toggle =
2365                                 !!(d & TP_NVRAM_MASK_HKT_BRIGHTNESS);
2366         }
2367         if (m & TP_NVRAM_HKEY_GROUP_VOLUME) {
2368                 d = nvram_read_byte(TP_NVRAM_ADDR_MIXER);
2369                 n->volume_level = (d & TP_NVRAM_MASK_LEVEL_VOLUME)
2370                                 >> TP_NVRAM_POS_LEVEL_VOLUME;
2371                 n->mute = !!(d & TP_NVRAM_MASK_MUTE);
2372                 n->volume_toggle = !!(d & TP_NVRAM_MASK_HKT_VOLUME);
2373         }
2374 }
2375
2376 static void hotkey_compare_and_issue_event(struct tp_nvram_state *oldn,
2377                                            struct tp_nvram_state *newn,
2378                                            const u32 event_mask)
2379 {
2380
2381 #define TPACPI_COMPARE_KEY(__scancode, __member) \
2382         do { \
2383                 if ((event_mask & (1 << __scancode)) && \
2384                     oldn->__member != newn->__member) \
2385                         tpacpi_hotkey_send_key(__scancode); \
2386         } while (0)
2387
2388 #define TPACPI_MAY_SEND_KEY(__scancode) \
2389         do { \
2390                 if (event_mask & (1 << __scancode)) \
2391                         tpacpi_hotkey_send_key(__scancode); \
2392         } while (0)
2393
2394         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_THINKPAD, thinkpad_toggle);
2395         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNSPACE, zoom_toggle);
2396         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF7, display_toggle);
2397         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF12, hibernate_toggle);
2398
2399         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNPAGEUP, thinklight_toggle);
2400
2401         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF8, displayexp_toggle);
2402
2403         /* handle volume */
2404         if (oldn->volume_toggle != newn->volume_toggle) {
2405                 if (oldn->mute != newn->mute) {
2406                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE);
2407                 }
2408                 if (oldn->volume_level > newn->volume_level) {
2409                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
2410                 } else if (oldn->volume_level < newn->volume_level) {
2411                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
2412                 } else if (oldn->mute == newn->mute) {
2413                         /* repeated key presses that didn't change state */
2414                         if (newn->mute) {
2415                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE);
2416                         } else if (newn->volume_level != 0) {
2417                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
2418                         } else {
2419                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
2420                         }
2421                 }
2422         }
2423
2424         /* handle brightness */
2425         if (oldn->brightness_toggle != newn->brightness_toggle) {
2426                 if (oldn->brightness_level < newn->brightness_level) {
2427                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
2428                 } else if (oldn->brightness_level > newn->brightness_level) {
2429                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
2430                 } else {
2431                         /* repeated key presses that didn't change state */
2432                         if (newn->brightness_level != 0) {
2433                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
2434                         } else {
2435                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
2436                         }
2437                 }
2438         }
2439
2440 #undef TPACPI_COMPARE_KEY
2441 #undef TPACPI_MAY_SEND_KEY
2442 }
2443
2444 /*
2445  * Polling driver
2446  *
2447  * We track all events in hotkey_source_mask all the time, since
2448  * most of them are edge-based.  We only issue those requested by
2449  * hotkey_user_mask or hotkey_driver_mask, though.
2450  */
2451 static int hotkey_kthread(void *data)
2452 {
2453         struct tp_nvram_state s[2];
2454         u32 poll_mask, event_mask;
2455         unsigned int si, so;
2456         unsigned long t;
2457         unsigned int change_detector, must_reset;
2458         unsigned int poll_freq;
2459
2460         mutex_lock(&hotkey_thread_mutex);
2461
2462         if (tpacpi_lifecycle == TPACPI_LIFE_EXITING)
2463                 goto exit;
2464
2465         set_freezable();
2466
2467         so = 0;
2468         si = 1;
2469         t = 0;
2470
2471         /* Initial state for compares */
2472         mutex_lock(&hotkey_thread_data_mutex);
2473         change_detector = hotkey_config_change;
2474         poll_mask = hotkey_source_mask;
2475         event_mask = hotkey_source_mask &
2476                         (hotkey_driver_mask | hotkey_user_mask);
2477         poll_freq = hotkey_poll_freq;
2478         mutex_unlock(&hotkey_thread_data_mutex);
2479         hotkey_read_nvram(&s[so], poll_mask);
2480
2481         while (!kthread_should_stop()) {
2482                 if (t == 0) {
2483                         if (likely(poll_freq))
2484                                 t = 1000/poll_freq;
2485                         else
2486                                 t = 100;        /* should never happen... */
2487                 }
2488                 t = msleep_interruptible(t);
2489                 if (unlikely(kthread_should_stop()))
2490                         break;
2491                 must_reset = try_to_freeze();
2492                 if (t > 0 && !must_reset)
2493                         continue;
2494
2495                 mutex_lock(&hotkey_thread_data_mutex);
2496                 if (must_reset || hotkey_config_change != change_detector) {
2497                         /* forget old state on thaw or config change */
2498                         si = so;
2499                         t = 0;
2500                         change_detector = hotkey_config_change;
2501                 }
2502                 poll_mask = hotkey_source_mask;
2503                 event_mask = hotkey_source_mask &
2504                                 (hotkey_driver_mask | hotkey_user_mask);
2505                 poll_freq = hotkey_poll_freq;
2506                 mutex_unlock(&hotkey_thread_data_mutex);
2507
2508                 if (likely(poll_mask)) {
2509                         hotkey_read_nvram(&s[si], poll_mask);
2510                         if (likely(si != so)) {
2511                                 hotkey_compare_and_issue_event(&s[so], &s[si],
2512                                                                 event_mask);
2513                         }
2514                 }
2515
2516                 so = si;
2517                 si ^= 1;
2518         }
2519
2520 exit:
2521         mutex_unlock(&hotkey_thread_mutex);
2522         return 0;
2523 }
2524
2525 /* call with hotkey_mutex held */
2526 static void hotkey_poll_stop_sync(void)
2527 {
2528         if (tpacpi_hotkey_task) {
2529                 if (frozen(tpacpi_hotkey_task) ||
2530                     freezing(tpacpi_hotkey_task))
2531                         thaw_process(tpacpi_hotkey_task);
2532
2533                 kthread_stop(tpacpi_hotkey_task);
2534                 tpacpi_hotkey_task = NULL;
2535                 mutex_lock(&hotkey_thread_mutex);
2536                 /* at this point, the thread did exit */
2537                 mutex_unlock(&hotkey_thread_mutex);
2538         }
2539 }
2540
2541 /* call with hotkey_mutex held */
2542 static void hotkey_poll_setup(bool may_warn)
2543 {
2544         const u32 poll_driver_mask = hotkey_driver_mask & hotkey_source_mask;
2545         const u32 poll_user_mask = hotkey_user_mask & hotkey_source_mask;
2546
2547         if (hotkey_poll_freq > 0 &&
2548             (poll_driver_mask ||
2549              (poll_user_mask && tpacpi_inputdev->users > 0))) {
2550                 if (!tpacpi_hotkey_task) {
2551                         tpacpi_hotkey_task = kthread_run(hotkey_kthread,
2552                                         NULL, TPACPI_NVRAM_KTHREAD_NAME);
2553                         if (IS_ERR(tpacpi_hotkey_task)) {
2554                                 tpacpi_hotkey_task = NULL;
2555                                 printk(TPACPI_ERR
2556                                        "could not create kernel thread "
2557                                        "for hotkey polling\n");
2558                         }
2559                 }
2560         } else {
2561                 hotkey_poll_stop_sync();
2562                 if (may_warn && (poll_driver_mask || poll_user_mask) &&
2563                     hotkey_poll_freq == 0) {
2564                         printk(TPACPI_NOTICE
2565                                 "hot keys 0x%08x and/or events 0x%08x "
2566                                 "require polling, which is currently "
2567                                 "disabled\n",
2568                                 poll_user_mask, poll_driver_mask);
2569                 }
2570         }
2571 }
2572
2573 static void hotkey_poll_setup_safe(bool may_warn)
2574 {
2575         mutex_lock(&hotkey_mutex);
2576         hotkey_poll_setup(may_warn);
2577         mutex_unlock(&hotkey_mutex);
2578 }
2579
2580 /* call with hotkey_mutex held */
2581 static void hotkey_poll_set_freq(unsigned int freq)
2582 {
2583         if (!freq)
2584                 hotkey_poll_stop_sync();
2585
2586         hotkey_poll_freq = freq;
2587 }
2588
2589 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2590
2591 static void hotkey_poll_setup_safe(bool __unused)
2592 {
2593 }
2594
2595 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2596
2597 static int hotkey_inputdev_open(struct input_dev *dev)
2598 {
2599         switch (tpacpi_lifecycle) {
2600         case TPACPI_LIFE_INIT:
2601                 /*
2602                  * hotkey_init will call hotkey_poll_setup_safe
2603                  * at the appropriate moment
2604                  */
2605                 return 0;
2606         case TPACPI_LIFE_EXITING:
2607                 return -EBUSY;
2608         case TPACPI_LIFE_RUNNING:
2609                 hotkey_poll_setup_safe(false);
2610                 return 0;
2611         }
2612
2613         /* Should only happen if tpacpi_lifecycle is corrupt */
2614         BUG();
2615         return -EBUSY;
2616 }
2617
2618 static void hotkey_inputdev_close(struct input_dev *dev)
2619 {
2620         /* disable hotkey polling when possible */
2621         if (tpacpi_lifecycle == TPACPI_LIFE_RUNNING &&
2622             !(hotkey_source_mask & hotkey_driver_mask))
2623                 hotkey_poll_setup_safe(false);
2624 }
2625
2626 /* sysfs hotkey enable ------------------------------------------------- */
2627 static ssize_t hotkey_enable_show(struct device *dev,
2628                            struct device_attribute *attr,
2629                            char *buf)
2630 {
2631         int res, status;
2632
2633         printk_deprecated_attribute("hotkey_enable",
2634                         "Hotkey reporting is always enabled");
2635
2636         res = hotkey_status_get(&status);
2637         if (res)
2638                 return res;
2639
2640         return snprintf(buf, PAGE_SIZE, "%d\n", status);
2641 }
2642
2643 static ssize_t hotkey_enable_store(struct device *dev,
2644                             struct device_attribute *attr,
2645                             const char *buf, size_t count)
2646 {
2647         unsigned long t;
2648
2649         printk_deprecated_attribute("hotkey_enable",
2650                         "Hotkeys can be disabled through hotkey_mask");
2651
2652         if (parse_strtoul(buf, 1, &t))
2653                 return -EINVAL;
2654
2655         if (t == 0)
2656                 return -EPERM;
2657
2658         return count;
2659 }
2660
2661 static struct device_attribute dev_attr_hotkey_enable =
2662         __ATTR(hotkey_enable, S_IWUSR | S_IRUGO,
2663                 hotkey_enable_show, hotkey_enable_store);
2664
2665 /* sysfs hotkey mask --------------------------------------------------- */
2666 static ssize_t hotkey_mask_show(struct device *dev,
2667                            struct device_attribute *attr,
2668                            char *buf)
2669 {
2670         return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_user_mask);
2671 }
2672
2673 static ssize_t hotkey_mask_store(struct device *dev,
2674                             struct device_attribute *attr,
2675                             const char *buf, size_t count)
2676 {
2677         unsigned long t;
2678         int res;
2679
2680         if (parse_strtoul(buf, 0xffffffffUL, &t))
2681                 return -EINVAL;
2682
2683         if (mutex_lock_killable(&hotkey_mutex))
2684                 return -ERESTARTSYS;
2685
2686         res = hotkey_user_mask_set(t);
2687
2688 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2689         hotkey_poll_setup(true);
2690 #endif
2691
2692         mutex_unlock(&hotkey_mutex);
2693
2694         tpacpi_disclose_usertask("hotkey_mask", "set to 0x%08lx\n", t);
2695
2696         return (res) ? res : count;
2697 }
2698
2699 static struct device_attribute dev_attr_hotkey_mask =
2700         __ATTR(hotkey_mask, S_IWUSR | S_IRUGO,
2701                 hotkey_mask_show, hotkey_mask_store);
2702
2703 /* sysfs hotkey bios_enabled ------------------------------------------- */
2704 static ssize_t hotkey_bios_enabled_show(struct device *dev,
2705                            struct device_attribute *attr,
2706                            char *buf)
2707 {
2708         return sprintf(buf, "0\n");
2709 }
2710
2711 static struct device_attribute dev_attr_hotkey_bios_enabled =
2712         __ATTR(hotkey_bios_enabled, S_IRUGO, hotkey_bios_enabled_show, NULL);
2713
2714 /* sysfs hotkey bios_mask ---------------------------------------------- */
2715 static ssize_t hotkey_bios_mask_show(struct device *dev,
2716                            struct device_attribute *attr,
2717                            char *buf)
2718 {
2719         printk_deprecated_attribute("hotkey_bios_mask",
2720                         "This attribute is useless.");
2721         return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_orig_mask);
2722 }
2723
2724 static struct device_attribute dev_attr_hotkey_bios_mask =
2725         __ATTR(hotkey_bios_mask, S_IRUGO, hotkey_bios_mask_show, NULL);
2726
2727 /* sysfs hotkey all_mask ----------------------------------------------- */
2728 static ssize_t hotkey_all_mask_show(struct device *dev,
2729                            struct device_attribute *attr,
2730                            char *buf)
2731 {
2732         return snprintf(buf, PAGE_SIZE, "0x%08x\n",
2733                                 hotkey_all_mask | hotkey_source_mask);
2734 }
2735
2736 static struct device_attribute dev_attr_hotkey_all_mask =
2737         __ATTR(hotkey_all_mask, S_IRUGO, hotkey_all_mask_show, NULL);
2738
2739 /* sysfs hotkey recommended_mask --------------------------------------- */
2740 static ssize_t hotkey_recommended_mask_show(struct device *dev,
2741                                             struct device_attribute *attr,
2742                                             char *buf)
2743 {
2744         return snprintf(buf, PAGE_SIZE, "0x%08x\n",
2745                         (hotkey_all_mask | hotkey_source_mask)
2746                         & ~hotkey_reserved_mask);
2747 }
2748
2749 static struct device_attribute dev_attr_hotkey_recommended_mask =
2750         __ATTR(hotkey_recommended_mask, S_IRUGO,
2751                 hotkey_recommended_mask_show, NULL);
2752
2753 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2754
2755 /* sysfs hotkey hotkey_source_mask ------------------------------------- */
2756 static ssize_t hotkey_source_mask_show(struct device *dev,
2757                            struct device_attribute *attr,
2758                            char *buf)
2759 {
2760         return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_source_mask);
2761 }
2762
2763 static ssize_t hotkey_source_mask_store(struct device *dev,
2764                             struct device_attribute *attr,
2765                             const char *buf, size_t count)
2766 {
2767         unsigned long t;
2768         u32 r_ev;
2769         int rc;
2770
2771         if (parse_strtoul(buf, 0xffffffffUL, &t) ||
2772                 ((t & ~TPACPI_HKEY_NVRAM_KNOWN_MASK) != 0))
2773                 return -EINVAL;
2774
2775         if (mutex_lock_killable(&hotkey_mutex))
2776                 return -ERESTARTSYS;
2777
2778         HOTKEY_CONFIG_CRITICAL_START
2779         hotkey_source_mask = t;
2780         HOTKEY_CONFIG_CRITICAL_END
2781
2782         rc = hotkey_mask_set((hotkey_user_mask | hotkey_driver_mask) &
2783                         ~hotkey_source_mask);
2784         hotkey_poll_setup(true);
2785
2786         /* check if events needed by the driver got disabled */
2787         r_ev = hotkey_driver_mask & ~(hotkey_acpi_mask & hotkey_all_mask)
2788                 & ~hotkey_source_mask & TPACPI_HKEY_NVRAM_KNOWN_MASK;
2789
2790         mutex_unlock(&hotkey_mutex);
2791
2792         if (rc < 0)
2793                 printk(TPACPI_ERR "hotkey_source_mask: failed to update the"
2794                         "firmware event mask!\n");
2795
2796         if (r_ev)
2797                 printk(TPACPI_NOTICE "hotkey_source_mask: "
2798                         "some important events were disabled: "
2799                         "0x%04x\n", r_ev);
2800
2801         tpacpi_disclose_usertask("hotkey_source_mask", "set to 0x%08lx\n", t);
2802
2803         return (rc < 0) ? rc : count;
2804 }
2805
2806 static struct device_attribute dev_attr_hotkey_source_mask =
2807         __ATTR(hotkey_source_mask, S_IWUSR | S_IRUGO,
2808                 hotkey_source_mask_show, hotkey_source_mask_store);
2809
2810 /* sysfs hotkey hotkey_poll_freq --------------------------------------- */
2811 static ssize_t hotkey_poll_freq_show(struct device *dev,
2812                            struct device_attribute *attr,
2813                            char *buf)
2814 {
2815         return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_poll_freq);
2816 }
2817
2818 static ssize_t hotkey_poll_freq_store(struct device *dev,
2819                             struct device_attribute *attr,
2820                             const char *buf, size_t count)
2821 {
2822         unsigned long t;
2823
2824         if (parse_strtoul(buf, 25, &t))
2825                 return -EINVAL;
2826
2827         if (mutex_lock_killable(&hotkey_mutex))
2828                 return -ERESTARTSYS;
2829
2830         hotkey_poll_set_freq(t);
2831         hotkey_poll_setup(true);
2832
2833         mutex_unlock(&hotkey_mutex);
2834
2835         tpacpi_disclose_usertask("hotkey_poll_freq", "set to %lu\n", t);
2836
2837         return count;
2838 }
2839
2840 static struct device_attribute dev_attr_hotkey_poll_freq =
2841         __ATTR(hotkey_poll_freq, S_IWUSR | S_IRUGO,
2842                 hotkey_poll_freq_show, hotkey_poll_freq_store);
2843
2844 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2845
2846 /* sysfs hotkey radio_sw (pollable) ------------------------------------ */
2847 static ssize_t hotkey_radio_sw_show(struct device *dev,
2848                            struct device_attribute *attr,
2849                            char *buf)
2850 {
2851         int res;
2852         res = hotkey_get_wlsw();
2853         if (res < 0)
2854                 return res;
2855
2856         /* Opportunistic update */
2857         tpacpi_rfk_update_hwblock_state((res == TPACPI_RFK_RADIO_OFF));
2858
2859         return snprintf(buf, PAGE_SIZE, "%d\n",
2860                         (res == TPACPI_RFK_RADIO_OFF) ? 0 : 1);
2861 }
2862
2863 static struct device_attribute dev_attr_hotkey_radio_sw =
2864         __ATTR(hotkey_radio_sw, S_IRUGO, hotkey_radio_sw_show, NULL);
2865
2866 static void hotkey_radio_sw_notify_change(void)
2867 {
2868         if (tp_features.hotkey_wlsw)
2869                 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2870                              "hotkey_radio_sw");
2871 }
2872
2873 /* sysfs hotkey tablet mode (pollable) --------------------------------- */
2874 static ssize_t hotkey_tablet_mode_show(struct device *dev,
2875                            struct device_attribute *attr,
2876                            char *buf)
2877 {
2878         int res, s;
2879         res = hotkey_get_tablet_mode(&s);
2880         if (res < 0)
2881                 return res;
2882
2883         return snprintf(buf, PAGE_SIZE, "%d\n", !!s);
2884 }
2885
2886 static struct device_attribute dev_attr_hotkey_tablet_mode =
2887         __ATTR(hotkey_tablet_mode, S_IRUGO, hotkey_tablet_mode_show, NULL);
2888
2889 static void hotkey_tablet_mode_notify_change(void)
2890 {
2891         if (tp_features.hotkey_tablet)
2892                 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2893                              "hotkey_tablet_mode");
2894 }
2895
2896 /* sysfs hotkey report_mode -------------------------------------------- */
2897 static ssize_t hotkey_report_mode_show(struct device *dev,
2898                            struct device_attribute *attr,
2899                            char *buf)
2900 {
2901         return snprintf(buf, PAGE_SIZE, "%d\n",
2902                 (hotkey_report_mode != 0) ? hotkey_report_mode : 1);
2903 }
2904
2905 static struct device_attribute dev_attr_hotkey_report_mode =
2906         __ATTR(hotkey_report_mode, S_IRUGO, hotkey_report_mode_show, NULL);
2907
2908 /* sysfs wakeup reason (pollable) -------------------------------------- */
2909 static ssize_t hotkey_wakeup_reason_show(struct device *dev,
2910                            struct device_attribute *attr,
2911                            char *buf)
2912 {
2913         return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_wakeup_reason);
2914 }
2915
2916 static struct device_attribute dev_attr_hotkey_wakeup_reason =
2917         __ATTR(wakeup_reason, S_IRUGO, hotkey_wakeup_reason_show, NULL);
2918
2919 static void hotkey_wakeup_reason_notify_change(void)
2920 {
2921         sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2922                      "wakeup_reason");
2923 }
2924
2925 /* sysfs wakeup hotunplug_complete (pollable) -------------------------- */
2926 static ssize_t hotkey_wakeup_hotunplug_complete_show(struct device *dev,
2927                            struct device_attribute *attr,
2928                            char *buf)
2929 {
2930         return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_autosleep_ack);
2931 }
2932
2933 static struct device_attribute dev_attr_hotkey_wakeup_hotunplug_complete =
2934         __ATTR(wakeup_hotunplug_complete, S_IRUGO,
2935                hotkey_wakeup_hotunplug_complete_show, NULL);
2936
2937 static void hotkey_wakeup_hotunplug_complete_notify_change(void)
2938 {
2939         sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2940                      "wakeup_hotunplug_complete");
2941 }
2942
2943 /* --------------------------------------------------------------------- */
2944
2945 static struct attribute *hotkey_attributes[] __initdata = {
2946         &dev_attr_hotkey_enable.attr,
2947         &dev_attr_hotkey_bios_enabled.attr,
2948         &dev_attr_hotkey_bios_mask.attr,
2949         &dev_attr_hotkey_report_mode.attr,
2950         &dev_attr_hotkey_wakeup_reason.attr,
2951         &dev_attr_hotkey_wakeup_hotunplug_complete.attr,
2952         &dev_attr_hotkey_mask.attr,
2953         &dev_attr_hotkey_all_mask.attr,
2954         &dev_attr_hotkey_recommended_mask.attr,
2955 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2956         &dev_attr_hotkey_source_mask.attr,
2957         &dev_attr_hotkey_poll_freq.attr,
2958 #endif
2959 };
2960
2961 /*
2962  * Sync both the hw and sw blocking state of all switches
2963  */
2964 static void tpacpi_send_radiosw_update(void)
2965 {
2966         int wlsw;
2967
2968         /*
2969          * We must sync all rfkill controllers *before* issuing any
2970          * rfkill input events, or we will race the rfkill core input
2971          * handler.
2972          *
2973          * tpacpi_inputdev_send_mutex works as a syncronization point
2974          * for the above.
2975          *
2976          * We optimize to avoid numerous calls to hotkey_get_wlsw.
2977          */
2978
2979         wlsw = hotkey_get_wlsw();
2980
2981         /* Sync hw blocking state first if it is hw-blocked */
2982         if (wlsw == TPACPI_RFK_RADIO_OFF)
2983                 tpacpi_rfk_update_hwblock_state(true);
2984
2985         /* Sync sw blocking state */
2986         tpacpi_rfk_update_swstate_all();
2987
2988         /* Sync hw blocking state last if it is hw-unblocked */
2989         if (wlsw == TPACPI_RFK_RADIO_ON)
2990                 tpacpi_rfk_update_hwblock_state(false);
2991
2992         /* Issue rfkill input event for WLSW switch */
2993         if (!(wlsw < 0)) {
2994                 mutex_lock(&tpacpi_inputdev_send_mutex);
2995
2996                 input_report_switch(tpacpi_inputdev,
2997                                     SW_RFKILL_ALL, (wlsw > 0));
2998                 input_sync(tpacpi_inputdev);
2999
3000                 mutex_unlock(&tpacpi_inputdev_send_mutex);
3001         }
3002
3003         /*
3004          * this can be unconditional, as we will poll state again
3005          * if userspace uses the notify to read data
3006          */
3007         hotkey_radio_sw_notify_change();
3008 }
3009
3010 static void hotkey_exit(void)
3011 {
3012 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
3013         mutex_lock(&hotkey_mutex);
3014         hotkey_poll_stop_sync();
3015         mutex_unlock(&hotkey_mutex);
3016 #endif
3017
3018         if (hotkey_dev_attributes)
3019                 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
3020
3021         kfree(hotkey_keycode_map);
3022
3023         dbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_HKEY,
3024                    "restoring original HKEY status and mask\n");
3025         /* yes, there is a bitwise or below, we want the
3026          * functions to be called even if one of them fail */
3027         if (((tp_features.hotkey_mask &&
3028               hotkey_mask_set(hotkey_orig_mask)) |
3029              hotkey_status_set(false)) != 0)
3030                 printk(TPACPI_ERR
3031                        "failed to restore hot key mask "
3032                        "to BIOS defaults\n");
3033 }
3034
3035 static void __init hotkey_unmap(const unsigned int scancode)
3036 {
3037         if (hotkey_keycode_map[scancode] != KEY_RESERVED) {
3038                 clear_bit(hotkey_keycode_map[scancode],
3039                           tpacpi_inputdev->keybit);
3040                 hotkey_keycode_map[scancode] = KEY_RESERVED;
3041         }
3042 }
3043
3044 /*
3045  * HKEY quirks:
3046  *   TPACPI_HK_Q_INIMASK:       Supports FN+F3,FN+F4,FN+F12
3047  */
3048
3049 #define TPACPI_HK_Q_INIMASK     0x0001
3050
3051 static const struct tpacpi_quirk tpacpi_hotkey_qtable[] __initconst = {
3052         TPACPI_Q_IBM('I', 'H', TPACPI_HK_Q_INIMASK), /* 600E */
3053         TPACPI_Q_IBM('I', 'N', TPACPI_HK_Q_INIMASK), /* 600E */
3054         TPACPI_Q_IBM('I', 'D', TPACPI_HK_Q_INIMASK), /* 770, 770E, 770ED */
3055         TPACPI_Q_IBM('I', 'W', TPACPI_HK_Q_INIMASK), /* A20m */
3056         TPACPI_Q_IBM('I', 'V', TPACPI_HK_Q_INIMASK), /* A20p */
3057         TPACPI_Q_IBM('1', '0', TPACPI_HK_Q_INIMASK), /* A21e, A22e */
3058         TPACPI_Q_IBM('K', 'U', TPACPI_HK_Q_INIMASK), /* A21e */
3059         TPACPI_Q_IBM('K', 'X', TPACPI_HK_Q_INIMASK), /* A21m, A22m */
3060         TPACPI_Q_IBM('K', 'Y', TPACPI_HK_Q_INIMASK), /* A21p, A22p */
3061         TPACPI_Q_IBM('1', 'B', TPACPI_HK_Q_INIMASK), /* A22e */
3062         TPACPI_Q_IBM('1', '3', TPACPI_HK_Q_INIMASK), /* A22m */
3063         TPACPI_Q_IBM('1', 'E', TPACPI_HK_Q_INIMASK), /* A30/p (0) */
3064         TPACPI_Q_IBM('1', 'C', TPACPI_HK_Q_INIMASK), /* R30 */
3065         TPACPI_Q_IBM('1', 'F', TPACPI_HK_Q_INIMASK), /* R31 */
3066         TPACPI_Q_IBM('I', 'Y', TPACPI_HK_Q_INIMASK), /* T20 */
3067         TPACPI_Q_IBM('K', 'Z', TPACPI_HK_Q_INIMASK), /* T21 */
3068         TPACPI_Q_IBM('1', '6', TPACPI_HK_Q_INIMASK), /* T22 */
3069         TPACPI_Q_IBM('I', 'Z', TPACPI_HK_Q_INIMASK), /* X20, X21 */
3070         TPACPI_Q_IBM('1', 'D', TPACPI_HK_Q_INIMASK), /* X22, X23, X24 */
3071 };
3072
3073 static int __init hotkey_init(struct ibm_init_struct *iibm)
3074 {
3075         /* Requirements for changing the default keymaps:
3076          *
3077          * 1. Many of the keys are mapped to KEY_RESERVED for very
3078          *    good reasons.  Do not change them unless you have deep
3079          *    knowledge on the IBM and Lenovo ThinkPad firmware for
3080          *    the various ThinkPad models.  The driver behaves
3081          *    differently for KEY_RESERVED: such keys have their
3082          *    hot key mask *unset* in mask_recommended, and also
3083          *    in the initial hot key mask programmed into the
3084          *    firmware at driver load time, which means the firm-
3085          *    ware may react very differently if you change them to
3086          *    something else;
3087          *
3088          * 2. You must be subscribed to the linux-thinkpad and
3089          *    ibm-acpi-devel mailing lists, and you should read the
3090          *    list archives since 2007 if you want to change the
3091          *    keymaps.  This requirement exists so that you will
3092          *    know the past history of problems with the thinkpad-
3093          *    acpi driver keymaps, and also that you will be
3094          *    listening to any bug reports;
3095          *
3096          * 3. Do not send thinkpad-acpi specific patches directly to
3097          *    for merging, *ever*.  Send them to the linux-acpi
3098          *    mailinglist for comments.  Merging is to be done only
3099          *    through acpi-test and the ACPI maintainer.
3100          *
3101          * If the above is too much to ask, don't change the keymap.
3102          * Ask the thinkpad-acpi maintainer to do it, instead.
3103          */
3104         static u16 ibm_keycode_map[] __initdata = {
3105                 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
3106                 KEY_FN_F1,      KEY_FN_F2,      KEY_COFFEE,     KEY_SLEEP,
3107                 KEY_WLAN,       KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
3108                 KEY_FN_F9,      KEY_FN_F10,     KEY_FN_F11,     KEY_SUSPEND,
3109
3110                 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
3111                 KEY_UNKNOWN,    /* 0x0C: FN+BACKSPACE */
3112                 KEY_UNKNOWN,    /* 0x0D: FN+INSERT */
3113                 KEY_UNKNOWN,    /* 0x0E: FN+DELETE */
3114
3115                 /* brightness: firmware always reacts to them */
3116                 KEY_RESERVED,   /* 0x0F: FN+HOME (brightness up) */
3117                 KEY_RESERVED,   /* 0x10: FN+END (brightness down) */
3118
3119                 /* Thinklight: firmware always react to it */
3120                 KEY_RESERVED,   /* 0x11: FN+PGUP (thinklight toggle) */
3121
3122                 KEY_UNKNOWN,    /* 0x12: FN+PGDOWN */
3123                 KEY_ZOOM,       /* 0x13: FN+SPACE (zoom) */
3124
3125                 /* Volume: firmware always react to it and reprograms
3126                  * the built-in *extra* mixer.  Never map it to control
3127                  * another mixer by default. */
3128                 KEY_RESERVED,   /* 0x14: VOLUME UP */
3129                 KEY_RESERVED,   /* 0x15: VOLUME DOWN */
3130                 KEY_RESERVED,   /* 0x16: MUTE */
3131
3132                 KEY_VENDOR,     /* 0x17: Thinkpad/AccessIBM/Lenovo */
3133
3134                 /* (assignments unknown, please report if found) */
3135                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3136                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3137         };
3138         static u16 lenovo_keycode_map[] __initdata = {
3139                 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
3140                 KEY_FN_F1,      KEY_COFFEE,     KEY_BATTERY,    KEY_SLEEP,
3141                 KEY_WLAN,       KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
3142                 KEY_FN_F9,      KEY_FN_F10,     KEY_FN_F11,     KEY_SUSPEND,
3143
3144                 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
3145                 KEY_UNKNOWN,    /* 0x0C: FN+BACKSPACE */
3146                 KEY_UNKNOWN,    /* 0x0D: FN+INSERT */
3147                 KEY_UNKNOWN,    /* 0x0E: FN+DELETE */
3148
3149                 /* These should be enabled --only-- when ACPI video
3150                  * is disabled (i.e. in "vendor" mode), and are handled
3151                  * in a special way by the init code */
3152                 KEY_BRIGHTNESSUP,       /* 0x0F: FN+HOME (brightness up) */
3153                 KEY_BRIGHTNESSDOWN,     /* 0x10: FN+END (brightness down) */
3154
3155                 KEY_RESERVED,   /* 0x11: FN+PGUP (thinklight toggle) */
3156
3157                 KEY_UNKNOWN,    /* 0x12: FN+PGDOWN */
3158                 KEY_ZOOM,       /* 0x13: FN+SPACE (zoom) */
3159
3160                 /* Volume: z60/z61, T60 (BIOS version?): firmware always
3161                  * react to it and reprograms the built-in *extra* mixer.
3162                  * Never map it to control another mixer by default.
3163                  *
3164                  * T60?, T61, R60?, R61: firmware and EC tries to send
3165                  * these over the regular keyboard, so these are no-ops,
3166                  * but there are still weird bugs re. MUTE, so do not
3167                  * change unless you get test reports from all Lenovo
3168                  * models.  May cause the BIOS to interfere with the
3169                  * HDA mixer.
3170                  */
3171                 KEY_RESERVED,   /* 0x14: VOLUME UP */
3172                 KEY_RESERVED,   /* 0x15: VOLUME DOWN */
3173                 KEY_RESERVED,   /* 0x16: MUTE */
3174
3175                 KEY_VENDOR,     /* 0x17: Thinkpad/AccessIBM/Lenovo */
3176
3177                 /* (assignments unknown, please report if found) */
3178                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3179                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3180         };
3181
3182 #define TPACPI_HOTKEY_MAP_LEN           ARRAY_SIZE(ibm_keycode_map)
3183 #define TPACPI_HOTKEY_MAP_SIZE          sizeof(ibm_keycode_map)
3184 #define TPACPI_HOTKEY_MAP_TYPESIZE      sizeof(ibm_keycode_map[0])
3185
3186         int res, i;
3187         int status;
3188         int hkeyv;
3189
3190         unsigned long quirks;
3191
3192         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3193                         "initializing hotkey subdriver\n");
3194
3195         BUG_ON(!tpacpi_inputdev);
3196         BUG_ON(tpacpi_inputdev->open != NULL ||
3197                tpacpi_inputdev->close != NULL);
3198
3199         TPACPI_ACPIHANDLE_INIT(hkey);
3200         mutex_init(&hotkey_mutex);
3201
3202 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
3203         mutex_init(&hotkey_thread_mutex);
3204         mutex_init(&hotkey_thread_data_mutex);
3205 #endif
3206
3207         /* hotkey not supported on 570 */
3208         tp_features.hotkey = hkey_handle != NULL;
3209
3210         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3211                 "hotkeys are %s\n",
3212                 str_supported(tp_features.hotkey));
3213
3214         if (!tp_features.hotkey)
3215                 return 1;
3216
3217         quirks = tpacpi_check_quirks(tpacpi_hotkey_qtable,
3218                                      ARRAY_SIZE(tpacpi_hotkey_qtable));
3219
3220         tpacpi_disable_brightness_delay();
3221
3222         /* MUST have enough space for all attributes to be added to
3223          * hotkey_dev_attributes */
3224         hotkey_dev_attributes = create_attr_set(
3225                                         ARRAY_SIZE(hotkey_attributes) + 2,
3226                                         NULL);
3227         if (!hotkey_dev_attributes)
3228                 return -ENOMEM;
3229         res = add_many_to_attr_set(hotkey_dev_attributes,
3230                         hotkey_attributes,
3231                         ARRAY_SIZE(hotkey_attributes));
3232         if (res)
3233                 goto err_exit;
3234
3235         /* mask not supported on 600e/x, 770e, 770x, A21e, A2xm/p,
3236            A30, R30, R31, T20-22, X20-21, X22-24.  Detected by checking
3237            for HKEY interface version 0x100 */
3238         if (acpi_evalf(hkey_handle, &hkeyv, "MHKV", "qd")) {
3239                 if ((hkeyv >> 8) != 1) {
3240                         printk(TPACPI_ERR "unknown version of the "
3241                                "HKEY interface: 0x%x\n", hkeyv);
3242                         printk(TPACPI_ERR "please report this to %s\n",
3243                                TPACPI_MAIL);
3244                 } else {
3245                         /*
3246                          * MHKV 0x100 in A31, R40, R40e,
3247                          * T4x, X31, and later
3248                          */
3249                         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3250                                 "firmware HKEY interface version: 0x%x\n",
3251                                 hkeyv);
3252
3253                         /* Paranoia check AND init hotkey_all_mask */
3254                         if (!acpi_evalf(hkey_handle, &hotkey_all_mask,
3255                                         "MHKA", "qd")) {
3256                                 printk(TPACPI_ERR
3257                                        "missing MHKA handler, "
3258                                        "please report this to %s\n",
3259                                        TPACPI_MAIL);
3260                                 /* Fallback: pre-init for FN+F3,F4,F12 */
3261                                 hotkey_all_mask = 0x080cU;
3262                         } else {
3263                                 tp_features.hotkey_mask = 1;
3264                         }
3265                 }
3266         }
3267
3268         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3269                 "hotkey masks are %s\n",
3270                 str_supported(tp_features.hotkey_mask));
3271
3272         /* Init hotkey_all_mask if not initialized yet */
3273         if (!tp_features.hotkey_mask && !hotkey_all_mask &&
3274             (quirks & TPACPI_HK_Q_INIMASK))
3275                 hotkey_all_mask = 0x080cU;  /* FN+F12, FN+F4, FN+F3 */
3276
3277         /* Init hotkey_acpi_mask and hotkey_orig_mask */
3278         if (tp_features.hotkey_mask) {
3279                 /* hotkey_source_mask *must* be zero for
3280                  * the first hotkey_mask_get to return hotkey_orig_mask */
3281                 res = hotkey_mask_get();
3282                 if (res)
3283                         goto err_exit;
3284
3285                 hotkey_orig_mask = hotkey_acpi_mask;
3286         } else {
3287                 hotkey_orig_mask = hotkey_all_mask;
3288                 hotkey_acpi_mask = hotkey_all_mask;
3289         }
3290
3291 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3292         if (dbg_wlswemul) {
3293                 tp_features.hotkey_wlsw = 1;
3294                 printk(TPACPI_INFO
3295                         "radio switch emulation enabled\n");
3296         } else
3297 #endif
3298         /* Not all thinkpads have a hardware radio switch */
3299         if (acpi_evalf(hkey_handle, &status, "WLSW", "qd")) {
3300                 tp_features.hotkey_wlsw = 1;
3301                 printk(TPACPI_INFO
3302                         "radio switch found; radios are %s\n",
3303                         enabled(status, 0));
3304         }
3305         if (tp_features.hotkey_wlsw)
3306                 res = add_to_attr_set(hotkey_dev_attributes,
3307                                 &dev_attr_hotkey_radio_sw.attr);
3308
3309         /* For X41t, X60t, X61t Tablets... */
3310         if (!res && acpi_evalf(hkey_handle, &status, "MHKG", "qd")) {
3311                 tp_features.hotkey_tablet = 1;
3312                 printk(TPACPI_INFO
3313                         "possible tablet mode switch found; "
3314                         "ThinkPad in %s mode\n",
3315                         (status & TP_HOTKEY_TABLET_MASK)?
3316                                 "tablet" : "laptop");
3317                 res = add_to_attr_set(hotkey_dev_attributes,
3318                                 &dev_attr_hotkey_tablet_mode.attr);
3319         }
3320
3321         if (!res)
3322                 res = register_attr_set_with_sysfs(
3323                                 hotkey_dev_attributes,
3324                                 &tpacpi_pdev->dev.kobj);
3325         if (res)
3326                 goto err_exit;
3327
3328         /* Set up key map */
3329
3330         hotkey_keycode_map = kmalloc(TPACPI_HOTKEY_MAP_SIZE,
3331                                         GFP_KERNEL);
3332         if (!hotkey_keycode_map) {
3333                 printk(TPACPI_ERR
3334                         "failed to allocate memory for key map\n");
3335                 res = -ENOMEM;
3336                 goto err_exit;
3337         }
3338
3339         if (thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO) {
3340                 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3341                            "using Lenovo default hot key map\n");
3342                 memcpy(hotkey_keycode_map, &lenovo_keycode_map,
3343                         TPACPI_HOTKEY_MAP_SIZE);
3344         } else {
3345                 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3346                            "using IBM default hot key map\n");
3347                 memcpy(hotkey_keycode_map, &ibm_keycode_map,
3348                         TPACPI_HOTKEY_MAP_SIZE);
3349         }
3350
3351         set_bit(EV_KEY, tpacpi_inputdev->evbit);
3352         set_bit(EV_MSC, tpacpi_inputdev->evbit);
3353         set_bit(MSC_SCAN, tpacpi_inputdev->mscbit);
3354         tpacpi_inputdev->keycodesize = TPACPI_HOTKEY_MAP_TYPESIZE;
3355         tpacpi_inputdev->keycodemax = TPACPI_HOTKEY_MAP_LEN;
3356         tpacpi_inputdev->keycode = hotkey_keycode_map;
3357         for (i = 0; i < TPACPI_HOTKEY_MAP_LEN; i++) {
3358                 if (hotkey_keycode_map[i] != KEY_RESERVED) {
3359                         set_bit(hotkey_keycode_map[i],
3360                                 tpacpi_inputdev->keybit);
3361                 } else {
3362                         if (i < sizeof(hotkey_reserved_mask)*8)
3363                                 hotkey_reserved_mask |= 1 << i;
3364                 }
3365         }
3366
3367         if (tp_features.hotkey_wlsw) {
3368                 set_bit(EV_SW, tpacpi_inputdev->evbit);
3369                 set_bit(SW_RFKILL_ALL, tpacpi_inputdev->swbit);
3370         }
3371         if (tp_features.hotkey_tablet) {
3372                 set_bit(EV_SW, tpacpi_inputdev->evbit);
3373                 set_bit(SW_TABLET_MODE, tpacpi_inputdev->swbit);
3374         }
3375
3376         /* Do not issue duplicate brightness change events to
3377          * userspace */
3378         if (!tp_features.bright_acpimode)
3379                 /* update bright_acpimode... */
3380                 tpacpi_check_std_acpi_brightness_support();
3381
3382         if (tp_features.bright_acpimode && acpi_video_backlight_support()) {
3383                 printk(TPACPI_INFO
3384                        "This ThinkPad has standard ACPI backlight "
3385                        "brightness control, supported by the ACPI "
3386                        "video driver\n");
3387                 printk(TPACPI_NOTICE
3388                        "Disabling thinkpad-acpi brightness events "
3389                        "by default...\n");
3390
3391                 /* Disable brightness up/down on Lenovo thinkpads when
3392                  * ACPI is handling them, otherwise it is plain impossible
3393                  * for userspace to do something even remotely sane */
3394                 hotkey_reserved_mask |=
3395                         (1 << TP_ACPI_HOTKEYSCAN_FNHOME)
3396                         | (1 << TP_ACPI_HOTKEYSCAN_FNEND);
3397                 hotkey_unmap(TP_ACPI_HOTKEYSCAN_FNHOME);
3398                 hotkey_unmap(TP_ACPI_HOTKEYSCAN_FNEND);
3399         }
3400
3401 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
3402         hotkey_source_mask = TPACPI_HKEY_NVRAM_GOOD_MASK
3403                                 & ~hotkey_all_mask
3404                                 & ~hotkey_reserved_mask;
3405
3406         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3407                     "hotkey source mask 0x%08x, polling freq %u\n",
3408                     hotkey_source_mask, hotkey_poll_freq);
3409 #endif
3410
3411         dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3412                         "enabling firmware HKEY event interface...\n");
3413         res = hotkey_status_set(true);
3414         if (res) {
3415                 hotkey_exit();
3416                 return res;
3417         }
3418         res = hotkey_mask_set(((hotkey_all_mask & ~hotkey_reserved_mask)
3419                                | hotkey_driver_mask)
3420                               & ~hotkey_source_mask);
3421         if (res < 0 && res != -ENXIO) {
3422                 hotkey_exit();
3423                 return res;
3424         }
3425         hotkey_user_mask = (hotkey_acpi_mask | hotkey_source_mask)
3426                                 & ~hotkey_reserved_mask;
3427         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3428                 "initial masks: user=0x%08x, fw=0x%08x, poll=0x%08x\n",
3429                 hotkey_user_mask, hotkey_acpi_mask, hotkey_source_mask);
3430
3431         dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3432                         "legacy ibm/hotkey event reporting over procfs %s\n",
3433                         (hotkey_report_mode < 2) ?
3434                                 "enabled" : "disabled");
3435
3436         tpacpi_inputdev->open = &hotkey_inputdev_open;
3437         tpacpi_inputdev->close = &hotkey_inputdev_close;
3438
3439         hotkey_poll_setup_safe(true);
3440         tpacpi_send_radiosw_update();
3441         tpacpi_input_send_tabletsw();
3442
3443         return 0;
3444
3445 err_exit:
3446         delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
3447         hotkey_dev_attributes = NULL;
3448
3449         return (res < 0)? res : 1;
3450 }
3451
3452 static bool hotkey_notify_hotkey(const u32 hkey,
3453                                  bool *send_acpi_ev,
3454                                  bool *ignore_acpi_ev)
3455 {
3456         /* 0x1000-0x1FFF: key presses */
3457         unsigned int scancode = hkey & 0xfff;
3458         *send_acpi_ev = true;
3459         *ignore_acpi_ev = false;
3460
3461         if (scancode > 0 && scancode < 0x21) {
3462                 scancode--;
3463                 if (!(hotkey_source_mask & (1 << scancode))) {
3464                         tpacpi_input_send_key_masked(scancode);
3465                         *send_acpi_ev = false;
3466                 } else {
3467                         *ignore_acpi_ev = true;
3468                 }
3469                 return true;
3470         }
3471         return false;
3472 }
3473
3474 static bool hotkey_notify_wakeup(const u32 hkey,
3475                                  bool *send_acpi_ev,
3476                                  bool *ignore_acpi_ev)
3477 {
3478         /* 0x2000-0x2FFF: Wakeup reason */
3479         *send_acpi_ev = true;
3480         *ignore_acpi_ev = false;
3481
3482         switch (hkey) {
3483         case TP_HKEY_EV_WKUP_S3_UNDOCK: /* suspend, undock */
3484         case TP_HKEY_EV_WKUP_S4_UNDOCK: /* hibernation, undock */
3485                 hotkey_wakeup_reason = TP_ACPI_WAKEUP_UNDOCK;
3486                 *ignore_acpi_ev = true;
3487                 break;
3488
3489         case TP_HKEY_EV_WKUP_S3_BAYEJ: /* suspend, bay eject */
3490         case TP_HKEY_EV_WKUP_S4_BAYEJ: /* hibernation, bay eject */
3491                 hotkey_wakeup_reason = TP_ACPI_WAKEUP_BAYEJ;
3492                 *ignore_acpi_ev = true;
3493                 break;
3494
3495         case TP_HKEY_EV_WKUP_S3_BATLOW: /* Battery on critical low level/S3 */
3496         case TP_HKEY_EV_WKUP_S4_BATLOW: /* Battery on critical low level/S4 */
3497                 printk(TPACPI_ALERT
3498                         "EMERGENCY WAKEUP: battery almost empty\n");
3499                 /* how to auto-heal: */
3500                 /* 2313: woke up from S3, go to S4/S5 */
3501                 /* 2413: woke up from S4, go to S5 */
3502                 break;
3503
3504         default:
3505                 return false;
3506         }
3507
3508         if (hotkey_wakeup_reason != TP_ACPI_WAKEUP_NONE) {
3509                 printk(TPACPI_INFO
3510                        "woke up due to a hot-unplug "
3511                        "request...\n");
3512                 hotkey_wakeup_reason_notify_change();
3513         }
3514         return true;
3515 }
3516
3517 static bool hotkey_notify_usrevent(const u32 hkey,
3518                                  bool *send_acpi_ev,
3519                                  bool *ignore_acpi_ev)
3520 {
3521         /* 0x5000-0x5FFF: human interface helpers */
3522         *send_acpi_ev = true;
3523         *ignore_acpi_ev = false;
3524
3525         switch (hkey) {
3526         case TP_HKEY_EV_PEN_INSERTED:  /* X61t: tablet pen inserted into bay */
3527         case TP_HKEY_EV_PEN_REMOVED:   /* X61t: tablet pen removed from bay */
3528                 return true;
3529
3530         case TP_HKEY_EV_TABLET_TABLET:   /* X41t-X61t: tablet mode */
3531         case TP_HKEY_EV_TABLET_NOTEBOOK: /* X41t-X61t: normal mode */
3532                 tpacpi_input_send_tabletsw();
3533                 hotkey_tablet_mode_notify_change();
3534                 *send_acpi_ev = false;
3535                 return true;
3536
3537         case TP_HKEY_EV_LID_CLOSE:      /* Lid closed */
3538         case TP_HKEY_EV_LID_OPEN:       /* Lid opened */
3539         case TP_HKEY_EV_BRGHT_CHANGED:  /* brightness changed */
3540                 /* do not propagate these events */
3541                 *ignore_acpi_ev = true;
3542                 return true;
3543
3544         default:
3545                 return false;
3546         }
3547 }
3548
3549 static bool hotkey_notify_thermal(const u32 hkey,
3550                                  bool *send_acpi_ev,
3551                                  bool *ignore_acpi_ev)
3552 {
3553         /* 0x6000-0x6FFF: thermal alarms */
3554         *send_acpi_ev = true;
3555         *ignore_acpi_ev = false;
3556
3557         switch (hkey) {
3558         case TP_HKEY_EV_ALARM_BAT_HOT:
3559                 printk(TPACPI_CRIT
3560                         "THERMAL ALARM: battery is too hot!\n");
3561                 /* recommended action: warn user through gui */
3562                 return true;
3563         case TP_HKEY_EV_ALARM_BAT_XHOT:
3564                 printk(TPACPI_ALERT
3565                         "THERMAL EMERGENCY: battery is extremely hot!\n");
3566                 /* recommended action: immediate sleep/hibernate */
3567                 return true;
3568         case TP_HKEY_EV_ALARM_SENSOR_HOT:
3569                 printk(TPACPI_CRIT
3570                         "THERMAL ALARM: "
3571                         "a sensor reports something is too hot!\n");
3572                 /* recommended action: warn user through gui, that */
3573                 /* some internal component is too hot */
3574                 return true;
3575         case TP_HKEY_EV_ALARM_SENSOR_XHOT:
3576                 printk(TPACPI_ALERT
3577                         "THERMAL EMERGENCY: "
3578                         "a sensor reports something is extremely hot!\n");
3579                 /* recommended action: immediate sleep/hibernate */
3580                 return true;
3581         case TP_HKEY_EV_THM_TABLE_CHANGED:
3582                 printk(TPACPI_INFO
3583                         "EC reports that Thermal Table has changed\n");
3584                 /* recommended action: do nothing, we don't have
3585                  * Lenovo ATM information */
3586                 return true;
3587         default:
3588                 printk(TPACPI_ALERT
3589                          "THERMAL ALERT: unknown thermal alarm received\n");
3590                 return false;
3591         }
3592 }
3593
3594 static void hotkey_notify(struct ibm_struct *ibm, u32 event)
3595 {
3596         u32 hkey;
3597         bool send_acpi_ev;
3598         bool ignore_acpi_ev;
3599         bool known_ev;
3600
3601         if (event != 0x80) {
3602                 printk(TPACPI_ERR
3603                        "unknown HKEY notification event %d\n", event);
3604                 /* forward it to userspace, maybe it knows how to handle it */
3605                 acpi_bus_generate_netlink_event(
3606                                         ibm->acpi->device->pnp.device_class,
3607                                         dev_name(&ibm->acpi->device->dev),
3608                                         event, 0);
3609                 return;
3610         }
3611
3612         while (1) {
3613                 if (!acpi_evalf(hkey_handle, &hkey, "MHKP", "d")) {
3614                         printk(TPACPI_ERR "failed to retrieve HKEY event\n");
3615                         return;
3616                 }
3617
3618                 if (hkey == 0) {
3619                         /* queue empty */
3620                         return;
3621                 }
3622
3623                 send_acpi_ev = true;
3624                 ignore_acpi_ev = false;
3625
3626                 switch (hkey >> 12) {
3627                 case 1:
3628                         /* 0x1000-0x1FFF: key presses */
3629                         known_ev = hotkey_notify_hotkey(hkey, &send_acpi_ev,
3630                                                  &ignore_acpi_ev);
3631                         break;
3632                 case 2:
3633                         /* 0x2000-0x2FFF: Wakeup reason */
3634                         known_ev = hotkey_notify_wakeup(hkey, &send_acpi_ev,
3635                                                  &ignore_acpi_ev);
3636                         break;
3637                 case 3:
3638                         /* 0x3000-0x3FFF: bay-related wakeups */
3639                         if (hkey == TP_HKEY_EV_BAYEJ_ACK) {
3640                                 hotkey_autosleep_ack = 1;
3641                                 printk(TPACPI_INFO
3642                                        "bay ejected\n");
3643                                 hotkey_wakeup_hotunplug_complete_notify_change();
3644                                 known_ev = true;
3645                         } else {
3646                                 known_ev = false;
3647                         }
3648                         break;
3649                 case 4:
3650                         /* 0x4000-0x4FFF: dock-related wakeups */
3651                         if (hkey == TP_HKEY_EV_UNDOCK_ACK) {
3652                                 hotkey_autosleep_ack = 1;
3653                                 printk(TPACPI_INFO
3654                                        "undocked\n");
3655                                 hotkey_wakeup_hotunplug_complete_notify_change();
3656                                 known_ev = true;
3657                         } else {
3658                                 known_ev = false;
3659                         }
3660                         break;
3661                 case 5:
3662                         /* 0x5000-0x5FFF: human interface helpers */
3663                         known_ev = hotkey_notify_usrevent(hkey, &send_acpi_ev,
3664                                                  &ignore_acpi_ev);
3665                         break;
3666                 case 6:
3667                         /* 0x6000-0x6FFF: thermal alarms */
3668                         known_ev = hotkey_notify_thermal(hkey, &send_acpi_ev,
3669                                                  &ignore_acpi_ev);
3670                         break;
3671                 case 7:
3672                         /* 0x7000-0x7FFF: misc */
3673                         if (tp_features.hotkey_wlsw &&
3674                                         hkey == TP_HKEY_EV_RFKILL_CHANGED) {
3675                                 tpacpi_send_radiosw_update();
3676                                 send_acpi_ev = 0;
3677                                 known_ev = true;
3678                                 break;
3679                         }
3680                         /* fallthrough to default */
3681                 default:
3682                         known_ev = false;
3683                 }
3684                 if (!known_ev) {
3685                         printk(TPACPI_NOTICE
3686                                "unhandled HKEY event 0x%04x\n", hkey);
3687                         printk(TPACPI_NOTICE
3688                                "please report the conditions when this "
3689                                "event happened to %s\n", TPACPI_MAIL);
3690                 }
3691
3692                 /* Legacy events */
3693                 if (!ignore_acpi_ev &&
3694                     (send_acpi_ev || hotkey_report_mode < 2)) {
3695                         acpi_bus_generate_proc_event(ibm->acpi->device,
3696                                                      event, hkey);
3697                 }
3698
3699                 /* netlink events */
3700                 if (!ignore_acpi_ev && send_acpi_ev) {
3701                         acpi_bus_generate_netlink_event(
3702                                         ibm->acpi->device->pnp.device_class,
3703                                         dev_name(&ibm->acpi->device->dev),
3704                                         event, hkey);
3705                 }
3706         }
3707 }
3708
3709 static void hotkey_suspend(pm_message_t state)
3710 {
3711         /* Do these on suspend, we get the events on early resume! */
3712         hotkey_wakeup_reason = TP_ACPI_WAKEUP_NONE;
3713         hotkey_autosleep_ack = 0;
3714 }
3715
3716 static void hotkey_resume(void)
3717 {
3718         tpacpi_disable_brightness_delay();
3719
3720         if (hotkey_status_set(true) < 0 ||
3721             hotkey_mask_set(hotkey_acpi_mask) < 0)
3722                 printk(TPACPI_ERR
3723                        "error while attempting to reset the event "
3724                        "firmware interface\n");
3725
3726         tpacpi_send_radiosw_update();
3727         hotkey_tablet_mode_notify_change();
3728         hotkey_wakeup_reason_notify_change();
3729         hotkey_wakeup_hotunplug_complete_notify_change();
3730         hotkey_poll_setup_safe(false);
3731 }
3732
3733 /* procfs -------------------------------------------------------------- */
3734 static int hotkey_read(char *p)
3735 {
3736         int res, status;
3737         int len = 0;
3738
3739         if (!tp_features.hotkey) {
3740                 len += sprintf(p + len, "status:\t\tnot supported\n");
3741                 return len;
3742         }
3743
3744         if (mutex_lock_killable(&hotkey_mutex))
3745                 return -ERESTARTSYS;
3746         res = hotkey_status_get(&status);
3747         if (!res)
3748                 res = hotkey_mask_get();
3749         mutex_unlock(&hotkey_mutex);
3750         if (res)
3751                 return res;
3752
3753         len += sprintf(p + len, "status:\t\t%s\n", enabled(status, 0));
3754         if (hotkey_all_mask) {
3755                 len += sprintf(p + len, "mask:\t\t0x%08x\n", hotkey_user_mask);
3756                 len += sprintf(p + len,
3757                                "commands:\tenable, disable, reset, <mask>\n");
3758         } else {
3759                 len += sprintf(p + len, "mask:\t\tnot supported\n");
3760                 len += sprintf(p + len, "commands:\tenable, disable, reset\n");
3761         }
3762
3763         return len;
3764 }
3765
3766 static void hotkey_enabledisable_warn(bool enable)
3767 {
3768         tpacpi_log_usertask("procfs hotkey enable/disable");
3769         if (!WARN((tpacpi_lifecycle == TPACPI_LIFE_RUNNING || !enable),
3770                         TPACPI_WARN
3771                         "hotkey enable/disable functionality has been "
3772                         "removed from the driver.  Hotkeys are always "
3773                         "enabled\n"))
3774                 printk(TPACPI_ERR
3775                         "Please remove the hotkey=enable module "
3776                         "parameter, it is deprecated.  Hotkeys are always "
3777                         "enabled\n");
3778 }
3779
3780 static int hotkey_write(char *buf)
3781 {
3782         int res;
3783         u32 mask;
3784         char *cmd;
3785
3786         if (!tp_features.hotkey)
3787                 return -ENODEV;
3788
3789         if (mutex_lock_killable(&hotkey_mutex))
3790                 return -ERESTARTSYS;
3791
3792         mask = hotkey_user_mask;
3793
3794         res = 0;
3795         while ((cmd = next_cmd(&buf))) {
3796                 if (strlencmp(cmd, "enable") == 0) {
3797                         hotkey_enabledisable_warn(1);
3798                 } else if (strlencmp(cmd, "disable") == 0) {
3799                         hotkey_enabledisable_warn(0);
3800                         res = -EPERM;
3801                 } else if (strlencmp(cmd, "reset") == 0) {
3802                         mask = (hotkey_all_mask | hotkey_source_mask)
3803                                 & ~hotkey_reserved_mask;
3804                 } else if (sscanf(cmd, "0x%x", &mask) == 1) {
3805                         /* mask set */
3806                 } else if (sscanf(cmd, "%x", &mask) == 1) {
3807                         /* mask set */
3808                 } else {
3809                         res = -EINVAL;
3810                         goto errexit;
3811                 }
3812         }
3813
3814         if (!res) {
3815                 tpacpi_disclose_usertask("procfs hotkey",
3816                         "set mask to 0x%08x\n", mask);
3817                 res = hotkey_user_mask_set(mask);
3818         }
3819
3820 errexit:
3821         mutex_unlock(&hotkey_mutex);
3822         return res;
3823 }
3824
3825 static const struct acpi_device_id ibm_htk_device_ids[] = {
3826         {TPACPI_ACPI_HKEY_HID, 0},
3827         {"", 0},
3828 };
3829
3830 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver = {
3831         .hid = ibm_htk_device_ids,
3832         .notify = hotkey_notify,
3833         .handle = &hkey_handle,
3834         .type = ACPI_DEVICE_NOTIFY,
3835 };
3836
3837 static struct ibm_struct hotkey_driver_data = {
3838         .name = "hotkey",
3839         .read = hotkey_read,
3840         .write = hotkey_write,
3841         .exit = hotkey_exit,
3842         .resume = hotkey_resume,
3843         .suspend = hotkey_suspend,
3844         .acpi = &ibm_hotkey_acpidriver,
3845 };
3846
3847 /*************************************************************************
3848  * Bluetooth subdriver
3849  */
3850
3851 enum {
3852         /* ACPI GBDC/SBDC bits */
3853         TP_ACPI_BLUETOOTH_HWPRESENT     = 0x01, /* Bluetooth hw available */
3854         TP_ACPI_BLUETOOTH_RADIOSSW      = 0x02, /* Bluetooth radio enabled */
3855         TP_ACPI_BLUETOOTH_RESUMECTRL    = 0x04, /* Bluetooth state at resume:
3856                                                    off / last state */
3857 };
3858
3859 enum {
3860         /* ACPI \BLTH commands */
3861         TP_ACPI_BLTH_GET_ULTRAPORT_ID   = 0x00, /* Get Ultraport BT ID */
3862         TP_ACPI_BLTH_GET_PWR_ON_RESUME  = 0x01, /* Get power-on-resume state */
3863         TP_ACPI_BLTH_PWR_ON_ON_RESUME   = 0x02, /* Resume powered on */
3864         TP_ACPI_BLTH_PWR_OFF_ON_RESUME  = 0x03, /* Resume powered off */
3865         TP_ACPI_BLTH_SAVE_STATE         = 0x05, /* Save state for S4/S5 */
3866 };
3867
3868 #define TPACPI_RFK_BLUETOOTH_SW_NAME    "tpacpi_bluetooth_sw"
3869
3870 static int bluetooth_get_status(void)
3871 {
3872         int status;
3873
3874 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3875         if (dbg_bluetoothemul)
3876                 return (tpacpi_bluetooth_emulstate) ?
3877                        TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
3878 #endif
3879
3880         if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
3881                 return -EIO;
3882
3883         return ((status & TP_ACPI_BLUETOOTH_RADIOSSW) != 0) ?
3884                         TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
3885 }
3886
3887 static int bluetooth_set_status(enum tpacpi_rfkill_state state)
3888 {
3889         int status;
3890
3891         vdbg_printk(TPACPI_DBG_RFKILL,
3892                 "will attempt to %s bluetooth\n",
3893                 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable");
3894
3895 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3896         if (dbg_bluetoothemul) {
3897                 tpacpi_bluetooth_emulstate = (state == TPACPI_RFK_RADIO_ON);
3898                 return 0;
3899         }
3900 #endif
3901
3902         /* We make sure to keep TP_ACPI_BLUETOOTH_RESUMECTRL off */
3903         status = TP_ACPI_BLUETOOTH_RESUMECTRL;
3904         if (state == TPACPI_RFK_RADIO_ON)
3905                 status |= TP_ACPI_BLUETOOTH_RADIOSSW;
3906
3907         if (!acpi_evalf(hkey_handle, NULL, "SBDC", "vd", status))
3908                 return -EIO;
3909
3910         return 0;
3911 }
3912
3913 /* sysfs bluetooth enable ---------------------------------------------- */
3914 static ssize_t bluetooth_enable_show(struct device *dev,
3915                            struct device_attribute *attr,
3916                            char *buf)
3917 {
3918         return tpacpi_rfk_sysfs_enable_show(TPACPI_RFK_BLUETOOTH_SW_ID,
3919                         attr, buf);
3920 }
3921
3922 static ssize_t bluetooth_enable_store(struct device *dev,
3923                             struct device_attribute *attr,
3924                             const char *buf, size_t count)
3925 {
3926         return tpacpi_rfk_sysfs_enable_store(TPACPI_RFK_BLUETOOTH_SW_ID,
3927                                 attr, buf, count);
3928 }
3929
3930 static struct device_attribute dev_attr_bluetooth_enable =
3931         __ATTR(bluetooth_enable, S_IWUSR | S_IRUGO,
3932                 bluetooth_enable_show, bluetooth_enable_store);
3933
3934 /* --------------------------------------------------------------------- */
3935
3936 static struct attribute *bluetooth_attributes[] = {
3937         &dev_attr_bluetooth_enable.attr,
3938         NULL
3939 };
3940
3941 static const struct attribute_group bluetooth_attr_group = {
3942         .attrs = bluetooth_attributes,
3943 };
3944
3945 static const struct tpacpi_rfk_ops bluetooth_tprfk_ops = {
3946         .get_status = bluetooth_get_status,
3947         .set_status = bluetooth_set_status,
3948 };
3949
3950 static void bluetooth_shutdown(void)
3951 {
3952         /* Order firmware to save current state to NVRAM */
3953         if (!acpi_evalf(NULL, NULL, "\\BLTH", "vd",
3954                         TP_ACPI_BLTH_SAVE_STATE))
3955                 printk(TPACPI_NOTICE
3956                         "failed to save bluetooth state to NVRAM\n");
3957         else
3958                 vdbg_printk(TPACPI_DBG_RFKILL,
3959                         "bluestooth state saved to NVRAM\n");
3960 }
3961
3962 static void bluetooth_exit(void)
3963 {
3964         sysfs_remove_group(&tpacpi_pdev->dev.kobj,
3965                         &bluetooth_attr_group);
3966
3967         tpacpi_destroy_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID);
3968
3969         bluetooth_shutdown();
3970 }
3971
3972 static int __init bluetooth_init(struct ibm_init_struct *iibm)
3973 {
3974         int res;
3975         int status = 0;
3976
3977         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
3978                         "initializing bluetooth subdriver\n");
3979
3980         TPACPI_ACPIHANDLE_INIT(hkey);
3981
3982         /* bluetooth not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
3983            G4x, R30, R31, R40e, R50e, T20-22, X20-21 */
3984         tp_features.bluetooth = hkey_handle &&
3985             acpi_evalf(hkey_handle, &status, "GBDC", "qd");
3986
3987         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
3988                 "bluetooth is %s, status 0x%02x\n",
3989                 str_supported(tp_features.bluetooth),
3990                 status);
3991
3992 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3993         if (dbg_bluetoothemul) {
3994                 tp_features.bluetooth = 1;
3995                 printk(TPACPI_INFO
3996                         "bluetooth switch emulation enabled\n");
3997         } else
3998 #endif
3999         if (tp_features.bluetooth &&
4000             !(status & TP_ACPI_BLUETOOTH_HWPRESENT)) {
4001                 /* no bluetooth hardware present in system */
4002                 tp_features.bluetooth = 0;
4003                 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4004                            "bluetooth hardware not installed\n");
4005         }
4006
4007         if (!tp_features.bluetooth)
4008                 return 1;
4009
4010         res = tpacpi_new_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID,
4011                                 &bluetooth_tprfk_ops,
4012                                 RFKILL_TYPE_BLUETOOTH,
4013                                 TPACPI_RFK_BLUETOOTH_SW_NAME,
4014                                 true);
4015         if (res)
4016                 return res;
4017
4018         res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
4019                                 &bluetooth_attr_group);
4020         if (res) {
4021                 tpacpi_destroy_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID);
4022                 return res;
4023         }
4024
4025         return 0;
4026 }
4027
4028 /* procfs -------------------------------------------------------------- */
4029 static int bluetooth_read(char *p)
4030 {
4031         return tpacpi_rfk_procfs_read(TPACPI_RFK_BLUETOOTH_SW_ID, p);
4032 }
4033
4034 static int bluetooth_write(char *buf)
4035 {
4036         return tpacpi_rfk_procfs_write(TPACPI_RFK_BLUETOOTH_SW_ID, buf);
4037 }
4038
4039 static struct ibm_struct bluetooth_driver_data = {
4040         .name = "bluetooth",
4041         .read = bluetooth_read,
4042         .write = bluetooth_write,
4043         .exit = bluetooth_exit,
4044         .shutdown = bluetooth_shutdown,
4045 };
4046
4047 /*************************************************************************
4048  * Wan subdriver
4049  */
4050
4051 enum {
4052         /* ACPI GWAN/SWAN bits */
4053         TP_ACPI_WANCARD_HWPRESENT       = 0x01, /* Wan hw available */
4054         TP_ACPI_WANCARD_RADIOSSW        = 0x02, /* Wan radio enabled */
4055         TP_ACPI_WANCARD_RESUMECTRL      = 0x04, /* Wan state at resume:
4056                                                    off / last state */
4057 };
4058
4059 #define TPACPI_RFK_WWAN_SW_NAME         "tpacpi_wwan_sw"
4060
4061 static int wan_get_status(void)
4062 {
4063         int status;
4064
4065 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4066         if (dbg_wwanemul)
4067                 return (tpacpi_wwan_emulstate) ?
4068                        TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4069 #endif
4070
4071         if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
4072                 return -EIO;
4073
4074         return ((status & TP_ACPI_WANCARD_RADIOSSW) != 0) ?
4075                         TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4076 }
4077
4078 static int wan_set_status(enum tpacpi_rfkill_state state)
4079 {
4080         int status;
4081
4082         vdbg_printk(TPACPI_DBG_RFKILL,
4083                 "will attempt to %s wwan\n",
4084                 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable");
4085
4086 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4087         if (dbg_wwanemul) {
4088                 tpacpi_wwan_emulstate = (state == TPACPI_RFK_RADIO_ON);
4089                 return 0;
4090         }
4091 #endif
4092
4093         /* We make sure to set TP_ACPI_WANCARD_RESUMECTRL */
4094         status = TP_ACPI_WANCARD_RESUMECTRL;
4095         if (state == TPACPI_RFK_RADIO_ON)
4096                 status |= TP_ACPI_WANCARD_RADIOSSW;
4097
4098         if (!acpi_evalf(hkey_handle, NULL, "SWAN", "vd", status))
4099                 return -EIO;
4100
4101         return 0;
4102 }
4103
4104 /* sysfs wan enable ---------------------------------------------------- */
4105 static ssize_t wan_enable_show(struct device *dev,
4106                            struct device_attribute *attr,
4107                            char *buf)
4108 {
4109         return tpacpi_rfk_sysfs_enable_show(TPACPI_RFK_WWAN_SW_ID,
4110                         attr, buf);
4111 }
4112
4113 static ssize_t wan_enable_store(struct device *dev,
4114                             struct device_attribute *attr,
4115                             const char *buf, size_t count)
4116 {
4117         return tpacpi_rfk_sysfs_enable_store(TPACPI_RFK_WWAN_SW_ID,
4118                         attr, buf, count);
4119 }
4120
4121 static struct device_attribute dev_attr_wan_enable =
4122         __ATTR(wwan_enable, S_IWUSR | S_IRUGO,
4123                 wan_enable_show, wan_enable_store);
4124
4125 /* --------------------------------------------------------------------- */
4126
4127 static struct attribute *wan_attributes[] = {
4128         &dev_attr_wan_enable.attr,
4129         NULL
4130 };
4131
4132 static const struct attribute_group wan_attr_group = {
4133         .attrs = wan_attributes,
4134 };
4135
4136 static const struct tpacpi_rfk_ops wan_tprfk_ops = {
4137         .get_status = wan_get_status,
4138         .set_status = wan_set_status,
4139 };
4140
4141 static void wan_shutdown(void)
4142 {
4143         /* Order firmware to save current state to NVRAM */
4144         if (!acpi_evalf(NULL, NULL, "\\WGSV", "vd",
4145                         TP_ACPI_WGSV_SAVE_STATE))
4146                 printk(TPACPI_NOTICE
4147                         "failed to save WWAN state to NVRAM\n");
4148         else
4149                 vdbg_printk(TPACPI_DBG_RFKILL,
4150                         "WWAN state saved to NVRAM\n");
4151 }
4152
4153 static void wan_exit(void)
4154 {
4155         sysfs_remove_group(&tpacpi_pdev->dev.kobj,
4156                 &wan_attr_group);
4157
4158         tpacpi_destroy_rfkill(TPACPI_RFK_WWAN_SW_ID);
4159
4160         wan_shutdown();
4161 }
4162
4163 static int __init wan_init(struct ibm_init_struct *iibm)
4164 {
4165         int res;
4166         int status = 0;
4167
4168         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4169                         "initializing wan subdriver\n");
4170
4171         TPACPI_ACPIHANDLE_INIT(hkey);
4172
4173         tp_features.wan = hkey_handle &&
4174             acpi_evalf(hkey_handle, &status, "GWAN", "qd");
4175
4176         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4177                 "wan is %s, status 0x%02x\n",
4178                 str_supported(tp_features.wan),
4179                 status);
4180
4181 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4182         if (dbg_wwanemul) {
4183                 tp_features.wan = 1;
4184                 printk(TPACPI_INFO
4185                         "wwan switch emulation enabled\n");
4186         } else
4187 #endif
4188         if (tp_features.wan &&
4189             !(status & TP_ACPI_WANCARD_HWPRESENT)) {
4190                 /* no wan hardware present in system */
4191                 tp_features.wan = 0;
4192                 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4193                            "wan hardware not installed\n");
4194         }
4195
4196         if (!tp_features.wan)
4197                 return 1;
4198
4199         res = tpacpi_new_rfkill(TPACPI_RFK_WWAN_SW_ID,
4200                                 &wan_tprfk_ops,
4201                                 RFKILL_TYPE_WWAN,
4202                                 TPACPI_RFK_WWAN_SW_NAME,
4203                                 true);
4204         if (res)
4205                 return res;
4206
4207         res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
4208                                 &wan_attr_group);
4209
4210         if (res) {
4211                 tpacpi_destroy_rfkill(TPACPI_RFK_WWAN_SW_ID);
4212                 return res;
4213         }
4214
4215         return 0;
4216 }
4217
4218 /* procfs -------------------------------------------------------------- */
4219 static int wan_read(char *p)
4220 {
4221         return tpacpi_rfk_procfs_read(TPACPI_RFK_WWAN_SW_ID, p);
4222 }
4223
4224 static int wan_write(char *buf)
4225 {
4226         return tpacpi_rfk_procfs_write(TPACPI_RFK_WWAN_SW_ID, buf);
4227 }
4228
4229 static struct ibm_struct wan_driver_data = {
4230         .name = "wan",
4231         .read = wan_read,
4232         .write = wan_write,
4233         .exit = wan_exit,
4234         .shutdown = wan_shutdown,
4235 };
4236
4237 /*************************************************************************
4238  * UWB subdriver
4239  */
4240
4241 enum {
4242         /* ACPI GUWB/SUWB bits */
4243         TP_ACPI_UWB_HWPRESENT   = 0x01, /* UWB hw available */
4244         TP_ACPI_UWB_RADIOSSW    = 0x02, /* UWB radio enabled */
4245 };
4246
4247 #define TPACPI_RFK_UWB_SW_NAME  "tpacpi_uwb_sw"
4248
4249 static int uwb_get_status(void)
4250 {
4251         int status;
4252
4253 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4254         if (dbg_uwbemul)
4255                 return (tpacpi_uwb_emulstate) ?
4256                        TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4257 #endif
4258
4259         if (!acpi_evalf(hkey_handle, &status, "GUWB", "d"))
4260                 return -EIO;
4261
4262         return ((status & TP_ACPI_UWB_RADIOSSW) != 0) ?
4263                         TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4264 }
4265
4266 static int uwb_set_status(enum tpacpi_rfkill_state state)
4267 {
4268         int status;
4269
4270         vdbg_printk(TPACPI_DBG_RFKILL,
4271                 "will attempt to %s UWB\n",
4272                 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable");
4273
4274 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4275         if (dbg_uwbemul) {
4276                 tpacpi_uwb_emulstate = (state == TPACPI_RFK_RADIO_ON);
4277                 return 0;
4278         }
4279 #endif
4280
4281         if (state == TPACPI_RFK_RADIO_ON)
4282                 status = TP_ACPI_UWB_RADIOSSW;
4283         else
4284                 status = 0;
4285
4286         if (!acpi_evalf(hkey_handle, NULL, "SUWB", "vd", status))
4287                 return -EIO;
4288
4289         return 0;
4290 }
4291
4292 /* --------------------------------------------------------------------- */
4293
4294 static const struct tpacpi_rfk_ops uwb_tprfk_ops = {
4295         .get_status = uwb_get_status,
4296         .set_status = uwb_set_status,
4297 };
4298
4299 static void uwb_exit(void)
4300 {
4301         tpacpi_destroy_rfkill(TPACPI_RFK_UWB_SW_ID);
4302 }
4303
4304 static int __init uwb_init(struct ibm_init_struct *iibm)
4305 {
4306         int res;
4307         int status = 0;
4308
4309         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4310                         "initializing uwb subdriver\n");
4311
4312         TPACPI_ACPIHANDLE_INIT(hkey);
4313
4314         tp_features.uwb = hkey_handle &&
4315             acpi_evalf(hkey_handle, &status, "GUWB", "qd");
4316
4317         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4318                 "uwb is %s, status 0x%02x\n",
4319                 str_supported(tp_features.uwb),
4320                 status);
4321
4322 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4323         if (dbg_uwbemul) {
4324                 tp_features.uwb = 1;
4325                 printk(TPACPI_INFO
4326                         "uwb switch emulation enabled\n");
4327         } else
4328 #endif
4329         if (tp_features.uwb &&
4330             !(status & TP_ACPI_UWB_HWPRESENT)) {
4331                 /* no uwb hardware present in system */
4332                 tp_features.uwb = 0;
4333                 dbg_printk(TPACPI_DBG_INIT,
4334                            "uwb hardware not installed\n");
4335         }
4336
4337         if (!tp_features.uwb)
4338                 return 1;
4339
4340         res = tpacpi_new_rfkill(TPACPI_RFK_UWB_SW_ID,
4341                                 &uwb_tprfk_ops,
4342                                 RFKILL_TYPE_UWB,
4343                                 TPACPI_RFK_UWB_SW_NAME,
4344                                 false);
4345         return res;
4346 }
4347
4348 static struct ibm_struct uwb_driver_data = {
4349         .name = "uwb",
4350         .exit = uwb_exit,
4351         .flags.experimental = 1,
4352 };
4353
4354 /*************************************************************************
4355  * Video subdriver
4356  */
4357
4358 #ifdef CONFIG_THINKPAD_ACPI_VIDEO
4359
4360 enum video_access_mode {
4361         TPACPI_VIDEO_NONE = 0,
4362         TPACPI_VIDEO_570,       /* 570 */
4363         TPACPI_VIDEO_770,       /* 600e/x, 770e, 770x */
4364         TPACPI_VIDEO_NEW,       /* all others */
4365 };
4366
4367 enum {  /* video status flags, based on VIDEO_570 */
4368         TP_ACPI_VIDEO_S_LCD = 0x01,     /* LCD output enabled */
4369         TP_ACPI_VIDEO_S_CRT = 0x02,     /* CRT output enabled */
4370         TP_ACPI_VIDEO_S_DVI = 0x08,     /* DVI output enabled */
4371 };
4372
4373 enum {  /* TPACPI_VIDEO_570 constants */
4374         TP_ACPI_VIDEO_570_PHSCMD = 0x87,        /* unknown magic constant :( */
4375         TP_ACPI_VIDEO_570_PHSMASK = 0x03,       /* PHS bits that map to
4376                                                  * video_status_flags */
4377         TP_ACPI_VIDEO_570_PHS2CMD = 0x8b,       /* unknown magic constant :( */
4378         TP_ACPI_VIDEO_570_PHS2SET = 0x80,       /* unknown magic constant :( */
4379 };
4380
4381 static enum video_access_mode video_supported;
4382 static int video_orig_autosw;
4383
4384 static int video_autosw_get(void);
4385 static int video_autosw_set(int enable);
4386
4387 TPACPI_HANDLE(vid2, root, "\\_SB.PCI0.AGPB.VID");       /* G41 */
4388
4389 static int __init video_init(struct ibm_init_struct *iibm)
4390 {
4391         int ivga;
4392
4393         vdbg_printk(TPACPI_DBG_INIT, "initializing video subdriver\n");
4394
4395         TPACPI_ACPIHANDLE_INIT(vid);
4396         TPACPI_ACPIHANDLE_INIT(vid2);
4397
4398         if (vid2_handle && acpi_evalf(NULL, &ivga, "\\IVGA", "d") && ivga)
4399                 /* G41, assume IVGA doesn't change */
4400                 vid_handle = vid2_handle;
4401
4402         if (!vid_handle)
4403                 /* video switching not supported on R30, R31 */
4404                 video_supported = TPACPI_VIDEO_NONE;
4405         else if (acpi_evalf(vid_handle, &video_orig_autosw, "SWIT", "qd"))
4406                 /* 570 */
4407                 video_supported = TPACPI_VIDEO_570;
4408         else if (acpi_evalf(vid_handle, &video_orig_autosw, "^VADL", "qd"))
4409                 /* 600e/x, 770e, 770x */
4410                 video_supported = TPACPI_VIDEO_770;
4411         else
4412                 /* all others */
4413                 video_supported = TPACPI_VIDEO_NEW;
4414
4415         vdbg_printk(TPACPI_DBG_INIT, "video is %s, mode %d\n",
4416                 str_supported(video_supported != TPACPI_VIDEO_NONE),
4417                 video_supported);
4418
4419         return (video_supported != TPACPI_VIDEO_NONE)? 0 : 1;
4420 }
4421
4422 static void video_exit(void)
4423 {
4424         dbg_printk(TPACPI_DBG_EXIT,
4425                    "restoring original video autoswitch mode\n");
4426         if (video_autosw_set(video_orig_autosw))
4427                 printk(TPACPI_ERR "error while trying to restore original "
4428                         "video autoswitch mode\n");
4429 }
4430
4431 static int video_outputsw_get(void)
4432 {
4433         int status = 0;
4434         int i;
4435
4436         switch (video_supported) {
4437         case TPACPI_VIDEO_570:
4438                 if (!acpi_evalf(NULL, &i, "\\_SB.PHS", "dd",
4439                                  TP_ACPI_VIDEO_570_PHSCMD))
4440                         return -EIO;
4441                 status = i & TP_ACPI_VIDEO_570_PHSMASK;
4442                 break;
4443         case TPACPI_VIDEO_770:
4444                 if (!acpi_evalf(NULL, &i, "\\VCDL", "d"))
4445                         return -EIO;
4446                 if (i)
4447                         status |= TP_ACPI_VIDEO_S_LCD;
4448                 if (!acpi_evalf(NULL, &i, "\\VCDC", "d"))
4449                         return -EIO;
4450                 if (i)
4451                         status |= TP_ACPI_VIDEO_S_CRT;
4452                 break;
4453         case TPACPI_VIDEO_NEW:
4454                 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 1) ||
4455                     !acpi_evalf(NULL, &i, "\\VCDC", "d"))
4456                         return -EIO;
4457                 if (i)
4458                         status |= TP_ACPI_VIDEO_S_CRT;
4459
4460                 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0) ||
4461                     !acpi_evalf(NULL, &i, "\\VCDL", "d"))
4462                         return -EIO;
4463                 if (i)
4464                         status |= TP_ACPI_VIDEO_S_LCD;
4465                 if (!acpi_evalf(NULL, &i, "\\VCDD", "d"))
4466                         return -EIO;
4467                 if (i)
4468                         status |= TP_ACPI_VIDEO_S_DVI;
4469                 break;
4470         default:
4471                 return -ENOSYS;
4472         }
4473
4474         return status;
4475 }
4476
4477 static int video_outputsw_set(int status)
4478 {
4479         int autosw;
4480         int res = 0;
4481
4482         switch (video_supported) {
4483         case TPACPI_VIDEO_570:
4484                 res = acpi_evalf(NULL, NULL,
4485                                  "\\_SB.PHS2", "vdd",
4486                                  TP_ACPI_VIDEO_570_PHS2CMD,
4487                                  status | TP_ACPI_VIDEO_570_PHS2SET);
4488                 break;
4489         case TPACPI_VIDEO_770:
4490                 autosw = video_autosw_get();
4491                 if (autosw < 0)
4492                         return autosw;
4493
4494                 res = video_autosw_set(1);
4495                 if (res)
4496                         return res;
4497                 res = acpi_evalf(vid_handle, NULL,
4498                                  "ASWT", "vdd", status * 0x100, 0);
4499                 if (!autosw && video_autosw_set(autosw)) {
4500                         printk(TPACPI_ERR
4501                                "video auto-switch left enabled due to error\n");
4502                         return -EIO;
4503                 }
4504                 break;
4505         case TPACPI_VIDEO_NEW:
4506                 res = acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0x80) &&
4507                       acpi_evalf(NULL, NULL, "\\VSDS", "vdd", status, 1);
4508                 break;
4509         default:
4510                 return -ENOSYS;
4511         }
4512
4513         return (res)? 0 : -EIO;
4514 }
4515
4516 static int video_autosw_get(void)
4517 {
4518         int autosw = 0;
4519
4520         switch (video_supported) {
4521         case TPACPI_VIDEO_570:
4522                 if (!acpi_evalf(vid_handle, &autosw, "SWIT", "d"))
4523                         return -EIO;
4524                 break;
4525         case TPACPI_VIDEO_770:
4526         case TPACPI_VIDEO_NEW:
4527                 if (!acpi_evalf(vid_handle, &autosw, "^VDEE", "d"))
4528                         return -EIO;
4529                 break;
4530         default:
4531                 return -ENOSYS;
4532         }
4533
4534         return autosw & 1;
4535 }
4536
4537 static int video_autosw_set(int enable)
4538 {
4539         if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", (enable)? 1 : 0))
4540                 return -EIO;
4541         return 0;
4542 }
4543
4544 static int video_outputsw_cycle(void)
4545 {
4546         int autosw = video_autosw_get();
4547         int res;
4548
4549         if (autosw < 0)
4550                 return autosw;
4551
4552         switch (video_supported) {
4553         case TPACPI_VIDEO_570:
4554                 res = video_autosw_set(1);
4555                 if (res)
4556                         return res;
4557                 res = acpi_evalf(ec_handle, NULL, "_Q16", "v");
4558                 break;
4559         case TPACPI_VIDEO_770:
4560         case TPACPI_VIDEO_NEW:
4561                 res = video_autosw_set(1);
4562                 if (res)
4563                         return res;
4564                 res = acpi_evalf(vid_handle, NULL, "VSWT", "v");
4565                 break;
4566         default:
4567                 return -ENOSYS;
4568         }
4569         if (!autosw && video_autosw_set(autosw)) {
4570                 printk(TPACPI_ERR
4571                        "video auto-switch left enabled due to error\n");
4572                 return -EIO;
4573         }
4574
4575         return (res)? 0 : -EIO;
4576 }
4577
4578 static int video_expand_toggle(void)
4579 {
4580         switch (video_supported) {
4581         case TPACPI_VIDEO_570:
4582                 return acpi_evalf(ec_handle, NULL, "_Q17", "v")?
4583                         0 : -EIO;
4584         case TPACPI_VIDEO_770:
4585                 return acpi_evalf(vid_handle, NULL, "VEXP", "v")?
4586                         0 : -EIO;
4587         case TPACPI_VIDEO_NEW:
4588                 return acpi_evalf(NULL, NULL, "\\VEXP", "v")?
4589                         0 : -EIO;
4590         default:
4591                 return -ENOSYS;
4592         }
4593         /* not reached */
4594 }
4595
4596 static int video_read(char *p)
4597 {
4598         int status, autosw;
4599         int len = 0;
4600
4601         if (video_supported == TPACPI_VIDEO_NONE) {
4602                 len += sprintf(p + len, "status:\t\tnot supported\n");
4603                 return len;
4604         }
4605
4606         status = video_outputsw_get();
4607         if (status < 0)
4608                 return status;
4609
4610         autosw = video_autosw_get();
4611         if (autosw < 0)
4612                 return autosw;
4613
4614         len += sprintf(p + len, "status:\t\tsupported\n");
4615         len += sprintf(p + len, "lcd:\t\t%s\n", enabled(status, 0));
4616         len += sprintf(p + len, "crt:\t\t%s\n", enabled(status, 1));
4617         if (video_supported == TPACPI_VIDEO_NEW)
4618                 len += sprintf(p + len, "dvi:\t\t%s\n", enabled(status, 3));
4619         len += sprintf(p + len, "auto:\t\t%s\n", enabled(autosw, 0));
4620         len += sprintf(p + len, "commands:\tlcd_enable, lcd_disable\n");
4621         len += sprintf(p + len, "commands:\tcrt_enable, crt_disable\n");
4622         if (video_supported == TPACPI_VIDEO_NEW)
4623                 len += sprintf(p + len, "commands:\tdvi_enable, dvi_disable\n");
4624         len += sprintf(p + len, "commands:\tauto_enable, auto_disable\n");
4625         len += sprintf(p + len, "commands:\tvideo_switch, expand_toggle\n");
4626
4627         return len;
4628 }
4629
4630 static int video_write(char *buf)
4631 {
4632         char *cmd;
4633         int enable, disable, status;
4634         int res;
4635
4636         if (video_supported == TPACPI_VIDEO_NONE)
4637                 return -ENODEV;
4638
4639         enable = 0;
4640         disable = 0;
4641
4642         while ((cmd = next_cmd(&buf))) {
4643                 if (strlencmp(cmd, "lcd_enable") == 0) {
4644                         enable |= TP_ACPI_VIDEO_S_LCD;
4645                 } else if (strlencmp(cmd, "lcd_disable") == 0) {
4646                         disable |= TP_ACPI_VIDEO_S_LCD;
4647                 } else if (strlencmp(cmd, "crt_enable") == 0) {
4648                         enable |= TP_ACPI_VIDEO_S_CRT;
4649                 } else if (strlencmp(cmd, "crt_disable") == 0) {
4650                         disable |= TP_ACPI_VIDEO_S_CRT;
4651                 } else if (video_supported == TPACPI_VIDEO_NEW &&
4652                            strlencmp(cmd, "dvi_enable") == 0) {
4653                         enable |= TP_ACPI_VIDEO_S_DVI;
4654                 } else if (video_supported == TPACPI_VIDEO_NEW &&
4655                            strlencmp(cmd, "dvi_disable") == 0) {
4656                         disable |= TP_ACPI_VIDEO_S_DVI;
4657                 } else if (strlencmp(cmd, "auto_enable") == 0) {
4658                         res = video_autosw_set(1);
4659                         if (res)
4660                                 return res;
4661                 } else if (strlencmp(cmd, "auto_disable") == 0) {
4662                         res = video_autosw_set(0);
4663                         if (res)
4664                                 return res;
4665                 } else if (strlencmp(cmd, "video_switch") == 0) {
4666                         res = video_outputsw_cycle();
4667                         if (res)
4668                                 return res;
4669                 } else if (strlencmp(cmd, "expand_toggle") == 0) {
4670                         res = video_expand_toggle();
4671                         if (res)
4672                                 return res;
4673                 } else
4674                         return -EINVAL;
4675         }
4676
4677         if (enable || disable) {
4678                 status = video_outputsw_get();
4679                 if (status < 0)
4680                         return status;
4681                 res = video_outputsw_set((status & ~disable) | enable);
4682                 if (res)
4683                         return res;
4684         }
4685
4686         return 0;
4687 }
4688
4689 static struct ibm_struct video_driver_data = {
4690         .name = "video",
4691         .read = video_read,
4692         .write = video_write,
4693         .exit = video_exit,
4694 };
4695
4696 #endif /* CONFIG_THINKPAD_ACPI_VIDEO */
4697
4698 /*************************************************************************
4699  * Light (thinklight) subdriver
4700  */
4701
4702 TPACPI_HANDLE(lght, root, "\\LGHT");    /* A21e, A2xm/p, T20-22, X20-21 */
4703 TPACPI_HANDLE(ledb, ec, "LEDB");                /* G4x */
4704
4705 static int light_get_status(void)
4706 {
4707         int status = 0;
4708
4709         if (tp_features.light_status) {
4710                 if (!acpi_evalf(ec_handle, &status, "KBLT", "d"))
4711                         return -EIO;
4712                 return (!!status);
4713         }
4714
4715         return -ENXIO;
4716 }
4717
4718 static int light_set_status(int status)
4719 {
4720         int rc;
4721
4722         if (tp_features.light) {
4723                 if (cmos_handle) {
4724                         rc = acpi_evalf(cmos_handle, NULL, NULL, "vd",
4725                                         (status)?
4726                                                 TP_CMOS_THINKLIGHT_ON :
4727                                                 TP_CMOS_THINKLIGHT_OFF);
4728                 } else {
4729                         rc = acpi_evalf(lght_handle, NULL, NULL, "vd",
4730                                         (status)? 1 : 0);
4731                 }
4732                 return (rc)? 0 : -EIO;
4733         }
4734
4735         return -ENXIO;
4736 }
4737
4738 static void light_set_status_worker(struct work_struct *work)
4739 {
4740         struct tpacpi_led_classdev *data =
4741                         container_of(work, struct tpacpi_led_classdev, work);
4742
4743         if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING))
4744                 light_set_status((data->new_state != TPACPI_LED_OFF));
4745 }
4746
4747 static void light_sysfs_set(struct led_classdev *led_cdev,
4748                         enum led_brightness brightness)
4749 {
4750         struct tpacpi_led_classdev *data =
4751                 container_of(led_cdev,
4752                              struct tpacpi_led_classdev,
4753                              led_classdev);
4754         data->new_state = (brightness != LED_OFF) ?
4755                                 TPACPI_LED_ON : TPACPI_LED_OFF;
4756         queue_work(tpacpi_wq, &data->work);
4757 }
4758
4759 static enum led_brightness light_sysfs_get(struct led_classdev *led_cdev)
4760 {
4761         return (light_get_status() == 1)? LED_FULL : LED_OFF;
4762 }
4763
4764 static struct tpacpi_led_classdev tpacpi_led_thinklight = {
4765         .led_classdev = {
4766                 .name           = "tpacpi::thinklight",
4767                 .brightness_set = &light_sysfs_set,
4768                 .brightness_get = &light_sysfs_get,
4769         }
4770 };
4771
4772 static int __init light_init(struct ibm_init_struct *iibm)
4773 {
4774         int rc;
4775
4776         vdbg_printk(TPACPI_DBG_INIT, "initializing light subdriver\n");
4777
4778         TPACPI_ACPIHANDLE_INIT(ledb);
4779         TPACPI_ACPIHANDLE_INIT(lght);
4780         TPACPI_ACPIHANDLE_INIT(cmos);
4781         INIT_WORK(&tpacpi_led_thinklight.work, light_set_status_worker);
4782
4783         /* light not supported on 570, 600e/x, 770e, 770x, G4x, R30, R31 */
4784         tp_features.light = (cmos_handle || lght_handle) && !ledb_handle;
4785
4786         if (tp_features.light)
4787                 /* light status not supported on
4788                    570, 600e/x, 770e, 770x, G4x, R30, R31, R32, X20 */
4789                 tp_features.light_status =
4790                         acpi_evalf(ec_handle, NULL, "KBLT", "qv");
4791
4792         vdbg_printk(TPACPI_DBG_INIT, "light is %s, light status is %s\n",
4793                 str_supported(tp_features.light),
4794                 str_supported(tp_features.light_status));
4795
4796         if (!tp_features.light)
4797                 return 1;
4798
4799         rc = led_classdev_register(&tpacpi_pdev->dev,
4800                                    &tpacpi_led_thinklight.led_classdev);
4801
4802         if (rc < 0) {
4803                 tp_features.light = 0;
4804                 tp_features.light_status = 0;
4805         } else  {
4806                 rc = 0;
4807         }
4808
4809         return rc;
4810 }
4811
4812 static void light_exit(void)
4813 {
4814         led_classdev_unregister(&tpacpi_led_thinklight.led_classdev);
4815         if (work_pending(&tpacpi_led_thinklight.work))
4816                 flush_workqueue(tpacpi_wq);
4817 }
4818
4819 static int light_read(char *p)
4820 {
4821         int len = 0;
4822         int status;
4823
4824         if (!tp_features.light) {
4825                 len += sprintf(p + len, "status:\t\tnot supported\n");
4826         } else if (!tp_features.light_status) {
4827                 len += sprintf(p + len, "status:\t\tunknown\n");
4828                 len += sprintf(p + len, "commands:\ton, off\n");
4829         } else {
4830                 status = light_get_status();
4831                 if (status < 0)
4832                         return status;
4833                 len += sprintf(p + len, "status:\t\t%s\n", onoff(status, 0));
4834                 len += sprintf(p + len, "commands:\ton, off\n");
4835         }
4836
4837         return len;
4838 }
4839
4840 static int light_write(char *buf)
4841 {
4842         char *cmd;
4843         int newstatus = 0;
4844
4845         if (!tp_features.light)
4846                 return -ENODEV;
4847
4848         while ((cmd = next_cmd(&buf))) {
4849                 if (strlencmp(cmd, "on") == 0) {
4850                         newstatus = 1;
4851                 } else if (strlencmp(cmd, "off") == 0) {
4852                         newstatus = 0;
4853                 } else
4854                         return -EINVAL;
4855         }
4856
4857         return light_set_status(newstatus);
4858 }
4859
4860 static struct ibm_struct light_driver_data = {
4861         .name = "light",
4862         .read = light_read,
4863         .write = light_write,
4864         .exit = light_exit,
4865 };
4866
4867 /*************************************************************************
4868  * CMOS subdriver
4869  */
4870
4871 /* sysfs cmos_command -------------------------------------------------- */
4872 static ssize_t cmos_command_store(struct device *dev,
4873                             struct device_attribute *attr,
4874                             const char *buf, size_t count)
4875 {
4876         unsigned long cmos_cmd;
4877         int res;
4878
4879         if (parse_strtoul(buf, 21, &cmos_cmd))
4880                 return -EINVAL;
4881
4882         res = issue_thinkpad_cmos_command(cmos_cmd);
4883         return (res)? res : count;
4884 }
4885
4886 static struct device_attribute dev_attr_cmos_command =
4887         __ATTR(cmos_command, S_IWUSR, NULL, cmos_command_store);
4888
4889 /* --------------------------------------------------------------------- */
4890
4891 static int __init cmos_init(struct ibm_init_struct *iibm)
4892 {
4893         int res;
4894
4895         vdbg_printk(TPACPI_DBG_INIT,
4896                 "initializing cmos commands subdriver\n");
4897
4898         TPACPI_ACPIHANDLE_INIT(cmos);
4899
4900         vdbg_printk(TPACPI_DBG_INIT, "cmos commands are %s\n",
4901                 str_supported(cmos_handle != NULL));
4902
4903         res = device_create_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
4904         if (res)
4905                 return res;
4906
4907         return (cmos_handle)? 0 : 1;
4908 }
4909
4910 static void cmos_exit(void)
4911 {
4912         device_remove_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
4913 }
4914
4915 static int cmos_read(char *p)
4916 {
4917         int len = 0;
4918
4919         /* cmos not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
4920            R30, R31, T20-22, X20-21 */
4921         if (!cmos_handle)
4922                 len += sprintf(p + len, "status:\t\tnot supported\n");
4923         else {
4924                 len += sprintf(p + len, "status:\t\tsupported\n");
4925                 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-21)\n");
4926         }
4927
4928         return len;
4929 }
4930
4931 static int cmos_write(char *buf)
4932 {
4933         char *cmd;
4934         int cmos_cmd, res;
4935
4936         while ((cmd = next_cmd(&buf))) {
4937                 if (sscanf(cmd, "%u", &cmos_cmd) == 1 &&
4938                     cmos_cmd >= 0 && cmos_cmd <= 21) {
4939                         /* cmos_cmd set */
4940                 } else
4941                         return -EINVAL;
4942
4943                 res = issue_thinkpad_cmos_command(cmos_cmd);
4944                 if (res)
4945                         return res;
4946         }
4947
4948         return 0;
4949 }
4950
4951 static struct ibm_struct cmos_driver_data = {
4952         .name = "cmos",
4953         .read = cmos_read,
4954         .write = cmos_write,
4955         .exit = cmos_exit,
4956 };
4957
4958 /*************************************************************************
4959  * LED subdriver
4960  */
4961
4962 enum led_access_mode {
4963         TPACPI_LED_NONE = 0,
4964         TPACPI_LED_570, /* 570 */
4965         TPACPI_LED_OLD, /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
4966         TPACPI_LED_NEW, /* all others */
4967 };
4968
4969 enum {  /* For TPACPI_LED_OLD */
4970         TPACPI_LED_EC_HLCL = 0x0c,      /* EC reg to get led to power on */
4971         TPACPI_LED_EC_HLBL = 0x0d,      /* EC reg to blink a lit led */
4972         TPACPI_LED_EC_HLMS = 0x0e,      /* EC reg to select led to command */
4973 };
4974
4975 static enum led_access_mode led_supported;
4976
4977 TPACPI_HANDLE(led, ec, "SLED",  /* 570 */
4978            "SYSL",              /* 600e/x, 770e, 770x, A21e, A2xm/p, */
4979                                 /* T20-22, X20-21 */
4980            "LED",               /* all others */
4981            );                   /* R30, R31 */
4982
4983 #define TPACPI_LED_NUMLEDS 16
4984 static struct tpacpi_led_classdev *tpacpi_leds;
4985 static enum led_status_t tpacpi_led_state_cache[TPACPI_LED_NUMLEDS];
4986 static const char * const tpacpi_led_names[TPACPI_LED_NUMLEDS] = {
4987         /* there's a limit of 19 chars + NULL before 2.6.26 */
4988         "tpacpi::power",
4989         "tpacpi:orange:batt",
4990         "tpacpi:green:batt",
4991         "tpacpi::dock_active",
4992         "tpacpi::bay_active",
4993         "tpacpi::dock_batt",
4994         "tpacpi::unknown_led",
4995         "tpacpi::standby",
4996         "tpacpi::dock_status1",
4997         "tpacpi::dock_status2",
4998         "tpacpi::unknown_led2",
4999         "tpacpi::unknown_led3",
5000         "tpacpi::thinkvantage",
5001 };
5002 #define TPACPI_SAFE_LEDS        0x1081U
5003
5004 static inline bool tpacpi_is_led_restricted(const unsigned int led)
5005 {
5006 #ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS
5007         return false;
5008 #else
5009         return (1U & (TPACPI_SAFE_LEDS >> led)) == 0;
5010 #endif
5011 }
5012
5013 static int led_get_status(const unsigned int led)
5014 {
5015         int status;
5016         enum led_status_t led_s;
5017
5018         switch (led_supported) {
5019         case TPACPI_LED_570:
5020                 if (!acpi_evalf(ec_handle,
5021                                 &status, "GLED", "dd", 1 << led))
5022                         return -EIO;
5023                 led_s = (status == 0)?
5024                                 TPACPI_LED_OFF :
5025                                 ((status == 1)?
5026                                         TPACPI_LED_ON :
5027                                         TPACPI_LED_BLINK);
5028                 tpacpi_led_state_cache[led] = led_s;
5029                 return led_s;
5030         default:
5031                 return -ENXIO;
5032         }
5033
5034         /* not reached */
5035 }
5036
5037 static int led_set_status(const unsigned int led,
5038                           const enum led_status_t ledstatus)
5039 {
5040         /* off, on, blink. Index is led_status_t */
5041         static const unsigned int led_sled_arg1[] = { 0, 1, 3 };
5042         static const unsigned int led_led_arg1[] = { 0, 0x80, 0xc0 };
5043
5044         int rc = 0;
5045
5046         switch (led_supported) {
5047         case TPACPI_LED_570:
5048                 /* 570 */
5049                 if (unlikely(led > 7))
5050                         return -EINVAL;
5051                 if (unlikely(tpacpi_is_led_restricted(led)))
5052                         return -EPERM;
5053                 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
5054                                 (1 << led), led_sled_arg1[ledstatus]))
5055                         rc = -EIO;
5056                 break;
5057         case TPACPI_LED_OLD:
5058                 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */
5059                 if (unlikely(led > 7))
5060                         return -EINVAL;
5061                 if (unlikely(tpacpi_is_led_restricted(led)))
5062                         return -EPERM;
5063                 rc = ec_write(TPACPI_LED_EC_HLMS, (1 << led));
5064                 if (rc >= 0)
5065                         rc = ec_write(TPACPI_LED_EC_HLBL,
5066                                       (ledstatus == TPACPI_LED_BLINK) << led);
5067                 if (rc >= 0)
5068                         rc = ec_write(TPACPI_LED_EC_HLCL,
5069                                       (ledstatus != TPACPI_LED_OFF) << led);
5070                 break;
5071         case TPACPI_LED_NEW:
5072                 /* all others */
5073                 if (unlikely(led >= TPACPI_LED_NUMLEDS))
5074                         return -EINVAL;
5075                 if (unlikely(tpacpi_is_led_restricted(led)))
5076                         return -EPERM;
5077                 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
5078                                 led, led_led_arg1[ledstatus]))
5079                         rc = -EIO;
5080                 break;
5081         default:
5082                 rc = -ENXIO;
5083         }
5084
5085         if (!rc)
5086                 tpacpi_led_state_cache[led] = ledstatus;
5087
5088         return rc;
5089 }
5090
5091 static void led_set_status_worker(struct work_struct *work)
5092 {
5093         struct tpacpi_led_classdev *data =
5094                 container_of(work, struct tpacpi_led_classdev, work);
5095
5096         if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING))
5097                 led_set_status(data->led, data->new_state);
5098 }
5099
5100 static void led_sysfs_set(struct led_classdev *led_cdev,
5101                         enum led_brightness brightness)
5102 {
5103         struct tpacpi_led_classdev *data = container_of(led_cdev,
5104                              struct tpacpi_led_classdev, led_classdev);
5105
5106         if (brightness == LED_OFF)
5107                 data->new_state = TPACPI_LED_OFF;
5108         else if (tpacpi_led_state_cache[data->led] != TPACPI_LED_BLINK)
5109                 data->new_state = TPACPI_LED_ON;
5110         else
5111                 data->new_state = TPACPI_LED_BLINK;
5112
5113         queue_work(tpacpi_wq, &data->work);
5114 }
5115
5116 static int led_sysfs_blink_set(struct led_classdev *led_cdev,
5117                         unsigned long *delay_on, unsigned long *delay_off)
5118 {
5119         struct tpacpi_led_classdev *data = container_of(led_cdev,
5120                              struct tpacpi_led_classdev, led_classdev);
5121
5122         /* Can we choose the flash rate? */
5123         if (*delay_on == 0 && *delay_off == 0) {
5124                 /* yes. set them to the hardware blink rate (1 Hz) */
5125                 *delay_on = 500; /* ms */
5126                 *delay_off = 500; /* ms */
5127         } else if ((*delay_on != 500) || (*delay_off != 500))
5128                 return -EINVAL;
5129
5130         data->new_state = TPACPI_LED_BLINK;
5131         queue_work(tpacpi_wq, &data->work);
5132
5133         return 0;
5134 }
5135
5136 static enum led_brightness led_sysfs_get(struct led_classdev *led_cdev)
5137 {
5138         int rc;
5139
5140         struct tpacpi_led_classdev *data = container_of(led_cdev,
5141                              struct tpacpi_led_classdev, led_classdev);
5142
5143         rc = led_get_status(data->led);
5144
5145         if (rc == TPACPI_LED_OFF || rc < 0)
5146                 rc = LED_OFF;   /* no error handling in led class :( */
5147         else
5148                 rc = LED_FULL;
5149
5150         return rc;
5151 }
5152
5153 static void led_exit(void)
5154 {
5155         unsigned int i;
5156
5157         for (i = 0; i < TPACPI_LED_NUMLEDS; i++) {
5158                 if (tpacpi_leds[i].led_classdev.name)
5159                         led_classdev_unregister(&tpacpi_leds[i].led_classdev);
5160         }
5161
5162         kfree(tpacpi_leds);
5163 }
5164
5165 static int __init tpacpi_init_led(unsigned int led)
5166 {
5167         int rc;
5168
5169         tpacpi_leds[led].led = led;
5170
5171         /* LEDs with no name don't get registered */
5172         if (!tpacpi_led_names[led])
5173                 return 0;
5174
5175         tpacpi_leds[led].led_classdev.brightness_set = &led_sysfs_set;
5176         tpacpi_leds[led].led_classdev.blink_set = &led_sysfs_blink_set;
5177         if (led_supported == TPACPI_LED_570)
5178                 tpacpi_leds[led].led_classdev.brightness_get =
5179                                                 &led_sysfs_get;
5180
5181         tpacpi_leds[led].led_classdev.name = tpacpi_led_names[led];
5182
5183         INIT_WORK(&tpacpi_leds[led].work, led_set_status_worker);
5184
5185         rc = led_classdev_register(&tpacpi_pdev->dev,
5186                                 &tpacpi_leds[led].led_classdev);
5187         if (rc < 0)
5188                 tpacpi_leds[led].led_classdev.name = NULL;
5189
5190         return rc;
5191 }
5192
5193 static const struct tpacpi_quirk led_useful_qtable[] __initconst = {
5194         TPACPI_Q_IBM('1', 'E', 0x009f), /* A30 */
5195         TPACPI_Q_IBM('1', 'N', 0x009f), /* A31 */
5196         TPACPI_Q_IBM('1', 'G', 0x009f), /* A31 */
5197
5198         TPACPI_Q_IBM('1', 'I', 0x0097), /* T30 */
5199         TPACPI_Q_IBM('1', 'R', 0x0097), /* T40, T41, T42, R50, R51 */
5200         TPACPI_Q_IBM('7', '0', 0x0097), /* T43, R52 */
5201         TPACPI_Q_IBM('1', 'Y', 0x0097), /* T43 */
5202         TPACPI_Q_IBM('1', 'W', 0x0097), /* R50e */
5203         TPACPI_Q_IBM('1', 'V', 0x0097), /* R51 */
5204         TPACPI_Q_IBM('7', '8', 0x0097), /* R51e */
5205         TPACPI_Q_IBM('7', '6', 0x0097), /* R52 */
5206
5207         TPACPI_Q_IBM('1', 'K', 0x00bf), /* X30 */
5208         TPACPI_Q_IBM('1', 'Q', 0x00bf), /* X31, X32 */
5209         TPACPI_Q_IBM('1', 'U', 0x00bf), /* X40 */
5210         TPACPI_Q_IBM('7', '4', 0x00bf), /* X41 */
5211         TPACPI_Q_IBM('7', '5', 0x00bf), /* X41t */
5212
5213         TPACPI_Q_IBM('7', '9', 0x1f97), /* T60 (1) */
5214         TPACPI_Q_IBM('7', '7', 0x1f97), /* Z60* (1) */
5215         TPACPI_Q_IBM('7', 'F', 0x1f97), /* Z61* (1) */
5216         TPACPI_Q_IBM('7', 'B', 0x1fb7), /* X60 (1) */
5217
5218         /* (1) - may have excess leds enabled on MSB */
5219
5220         /* Defaults (order matters, keep last, don't reorder!) */
5221         { /* Lenovo */
5222           .vendor = PCI_VENDOR_ID_LENOVO,
5223           .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY,
5224           .quirks = 0x1fffU,
5225         },
5226         { /* IBM ThinkPads with no EC version string */
5227           .vendor = PCI_VENDOR_ID_IBM,
5228           .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_UNKNOWN,
5229           .quirks = 0x00ffU,
5230         },
5231         { /* IBM ThinkPads with EC version string */
5232           .vendor = PCI_VENDOR_ID_IBM,
5233           .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY,
5234           .quirks = 0x00bfU,
5235         },
5236 };
5237
5238 #undef TPACPI_LEDQ_IBM
5239 #undef TPACPI_LEDQ_LNV
5240
5241 static int __init led_init(struct ibm_init_struct *iibm)
5242 {
5243         unsigned int i;
5244         int rc;
5245         unsigned long useful_leds;
5246
5247         vdbg_printk(TPACPI_DBG_INIT, "initializing LED subdriver\n");
5248
5249         TPACPI_ACPIHANDLE_INIT(led);
5250
5251         if (!led_handle)
5252                 /* led not supported on R30, R31 */
5253                 led_supported = TPACPI_LED_NONE;
5254         else if (strlencmp(led_path, "SLED") == 0)
5255                 /* 570 */
5256                 led_supported = TPACPI_LED_570;
5257         else if (strlencmp(led_path, "SYSL") == 0)
5258                 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
5259                 led_supported = TPACPI_LED_OLD;
5260         else
5261                 /* all others */
5262                 led_supported = TPACPI_LED_NEW;
5263
5264         vdbg_printk(TPACPI_DBG_INIT, "LED commands are %s, mode %d\n",
5265                 str_supported(led_supported), led_supported);
5266
5267         if (led_supported == TPACPI_LED_NONE)
5268                 return 1;
5269
5270         tpacpi_leds = kzalloc(sizeof(*tpacpi_leds) * TPACPI_LED_NUMLEDS,
5271                               GFP_KERNEL);
5272         if (!tpacpi_leds) {
5273                 printk(TPACPI_ERR "Out of memory for LED data\n");
5274                 return -ENOMEM;
5275         }
5276
5277         useful_leds = tpacpi_check_quirks(led_useful_qtable,
5278                                           ARRAY_SIZE(led_useful_qtable));
5279
5280         for (i = 0; i < TPACPI_LED_NUMLEDS; i++) {
5281                 if (!tpacpi_is_led_restricted(i) &&
5282                     test_bit(i, &useful_leds)) {
5283                         rc = tpacpi_init_led(i);
5284                         if (rc < 0) {
5285                                 led_exit();
5286                                 return rc;
5287                         }
5288                 }
5289         }
5290
5291 #ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS
5292         printk(TPACPI_NOTICE
5293                 "warning: userspace override of important "
5294                 "firmware LEDs is enabled\n");
5295 #endif
5296         return 0;
5297 }
5298
5299 #define str_led_status(s) \
5300         ((s) == TPACPI_LED_OFF ? "off" : \
5301                 ((s) == TPACPI_LED_ON ? "on" : "blinking"))
5302
5303 static int led_read(char *p)
5304 {
5305         int len = 0;
5306
5307         if (!led_supported) {
5308                 len += sprintf(p + len, "status:\t\tnot supported\n");
5309                 return len;
5310         }
5311         len += sprintf(p + len, "status:\t\tsupported\n");
5312
5313         if (led_supported == TPACPI_LED_570) {
5314                 /* 570 */
5315                 int i, status;
5316                 for (i = 0; i < 8; i++) {
5317                         status = led_get_status(i);
5318                         if (status < 0)
5319                                 return -EIO;
5320                         len += sprintf(p + len, "%d:\t\t%s\n",
5321                                        i, str_led_status(status));
5322                 }
5323         }
5324
5325         len += sprintf(p + len, "commands:\t"
5326                        "<led> on, <led> off, <led> blink (<led> is 0-15)\n");
5327
5328         return len;
5329 }
5330
5331 static int led_write(char *buf)
5332 {
5333         char *cmd;
5334         int led, rc;
5335         enum led_status_t s;
5336
5337         if (!led_supported)
5338                 return -ENODEV;
5339
5340         while ((cmd = next_cmd(&buf))) {
5341                 if (sscanf(cmd, "%d", &led) != 1 || led < 0 || led > 15)
5342                         return -EINVAL;
5343
5344                 if (strstr(cmd, "off")) {
5345                         s = TPACPI_LED_OFF;
5346                 } else if (strstr(cmd, "on")) {
5347                         s = TPACPI_LED_ON;
5348                 } else if (strstr(cmd, "blink")) {
5349                         s = TPACPI_LED_BLINK;
5350                 } else {
5351                         return -EINVAL;
5352                 }
5353
5354                 rc = led_set_status(led, s);
5355                 if (rc < 0)
5356                         return rc;
5357         }
5358
5359         return 0;
5360 }
5361
5362 static struct ibm_struct led_driver_data = {
5363         .name = "led",
5364         .read = led_read,
5365         .write = led_write,
5366         .exit = led_exit,
5367 };
5368
5369 /*************************************************************************
5370  * Beep subdriver
5371  */
5372
5373 TPACPI_HANDLE(beep, ec, "BEEP");        /* all except R30, R31 */
5374
5375 #define TPACPI_BEEP_Q1 0x0001
5376
5377 static const struct tpacpi_quirk beep_quirk_table[] __initconst = {
5378         TPACPI_Q_IBM('I', 'M', TPACPI_BEEP_Q1), /* 570 */
5379         TPACPI_Q_IBM('I', 'U', TPACPI_BEEP_Q1), /* 570E - unverified */
5380 };
5381
5382 static int __init beep_init(struct ibm_init_struct *iibm)
5383 {
5384         unsigned long quirks;
5385
5386         vdbg_printk(TPACPI_DBG_INIT, "initializing beep subdriver\n");
5387
5388         TPACPI_ACPIHANDLE_INIT(beep);
5389
5390         vdbg_printk(TPACPI_DBG_INIT, "beep is %s\n",
5391                 str_supported(beep_handle != NULL));
5392
5393         quirks = tpacpi_check_quirks(beep_quirk_table,
5394                                      ARRAY_SIZE(beep_quirk_table));
5395
5396         tp_features.beep_needs_two_args = !!(quirks & TPACPI_BEEP_Q1);
5397
5398         return (beep_handle)? 0 : 1;
5399 }
5400
5401 static int beep_read(char *p)
5402 {
5403         int len = 0;
5404
5405         if (!beep_handle)
5406                 len += sprintf(p + len, "status:\t\tnot supported\n");
5407         else {
5408                 len += sprintf(p + len, "status:\t\tsupported\n");
5409                 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-17)\n");
5410         }
5411
5412         return len;
5413 }
5414
5415 static int beep_write(char *buf)
5416 {
5417         char *cmd;
5418         int beep_cmd;
5419
5420         if (!beep_handle)
5421                 return -ENODEV;
5422
5423         while ((cmd = next_cmd(&buf))) {
5424                 if (sscanf(cmd, "%u", &beep_cmd) == 1 &&
5425                     beep_cmd >= 0 && beep_cmd <= 17) {
5426                         /* beep_cmd set */
5427                 } else
5428                         return -EINVAL;
5429                 if (tp_features.beep_needs_two_args) {
5430                         if (!acpi_evalf(beep_handle, NULL, NULL, "vdd",
5431                                         beep_cmd, 0))
5432                                 return -EIO;
5433                 } else {
5434                         if (!acpi_evalf(beep_handle, NULL, NULL, "vd",
5435                                         beep_cmd))
5436                                 return -EIO;
5437                 }
5438         }
5439
5440         return 0;
5441 }
5442
5443 static struct ibm_struct beep_driver_data = {
5444         .name = "beep",
5445         .read = beep_read,
5446         .write = beep_write,
5447 };
5448
5449 /*************************************************************************
5450  * Thermal subdriver
5451  */
5452
5453 enum thermal_access_mode {
5454         TPACPI_THERMAL_NONE = 0,        /* No thermal support */
5455         TPACPI_THERMAL_ACPI_TMP07,      /* Use ACPI TMP0-7 */
5456         TPACPI_THERMAL_ACPI_UPDT,       /* Use ACPI TMP0-7 with UPDT */
5457         TPACPI_THERMAL_TPEC_8,          /* Use ACPI EC regs, 8 sensors */
5458         TPACPI_THERMAL_TPEC_16,         /* Use ACPI EC regs, 16 sensors */
5459 };
5460
5461 enum { /* TPACPI_THERMAL_TPEC_* */
5462         TP_EC_THERMAL_TMP0 = 0x78,      /* ACPI EC regs TMP 0..7 */
5463         TP_EC_THERMAL_TMP8 = 0xC0,      /* ACPI EC regs TMP 8..15 */
5464         TP_EC_THERMAL_TMP_NA = -128,    /* ACPI EC sensor not available */
5465 };
5466
5467 #define TPACPI_MAX_THERMAL_SENSORS 16   /* Max thermal sensors supported */
5468 struct ibm_thermal_sensors_struct {
5469         s32 temp[TPACPI_MAX_THERMAL_SENSORS];
5470 };
5471
5472 static enum thermal_access_mode thermal_read_mode;
5473
5474 /* idx is zero-based */
5475 static int thermal_get_sensor(int idx, s32 *value)
5476 {
5477         int t;
5478         s8 tmp;
5479         char tmpi[5];
5480
5481         t = TP_EC_THERMAL_TMP0;
5482
5483         switch (thermal_read_mode) {
5484 #if TPACPI_MAX_THERMAL_SENSORS >= 16
5485         case TPACPI_THERMAL_TPEC_16:
5486                 if (idx >= 8 && idx <= 15) {
5487                         t = TP_EC_THERMAL_TMP8;
5488                         idx -= 8;
5489                 }
5490                 /* fallthrough */
5491 #endif
5492         case TPACPI_THERMAL_TPEC_8:
5493                 if (idx <= 7) {
5494                         if (!acpi_ec_read(t + idx, &tmp))
5495                                 return -EIO;
5496                         *value = tmp * 1000;
5497                         return 0;
5498                 }
5499                 break;
5500
5501         case TPACPI_THERMAL_ACPI_UPDT:
5502                 if (idx <= 7) {
5503                         snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
5504                         if (!acpi_evalf(ec_handle, NULL, "UPDT", "v"))
5505                                 return -EIO;
5506                         if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
5507                                 return -EIO;
5508                         *value = (t - 2732) * 100;
5509                         return 0;
5510                 }
5511                 break;
5512
5513         case TPACPI_THERMAL_ACPI_TMP07:
5514                 if (idx <= 7) {
5515                         snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
5516                         if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
5517                                 return -EIO;
5518                         if (t > 127 || t < -127)
5519                                 t = TP_EC_THERMAL_TMP_NA;
5520                         *value = t * 1000;
5521                         return 0;
5522                 }
5523                 break;
5524
5525         case TPACPI_THERMAL_NONE:
5526         default:
5527                 return -ENOSYS;
5528         }
5529
5530         return -EINVAL;
5531 }
5532
5533 static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s)
5534 {
5535         int res, i;
5536         int n;
5537
5538         n = 8;
5539         i = 0;
5540
5541         if (!s)
5542                 return -EINVAL;
5543
5544         if (thermal_read_mode == TPACPI_THERMAL_TPEC_16)
5545                 n = 16;
5546
5547         for (i = 0 ; i < n; i++) {
5548                 res = thermal_get_sensor(i, &s->temp[i]);
5549                 if (res)
5550                         return res;
5551         }
5552
5553         return n;
5554 }
5555
5556 /* sysfs temp##_input -------------------------------------------------- */
5557
5558 static ssize_t thermal_temp_input_show(struct device *dev,
5559                            struct device_attribute *attr,
5560                            char *buf)
5561 {
5562         struct sensor_device_attribute *sensor_attr =
5563                                         to_sensor_dev_attr(attr);
5564         int idx = sensor_attr->index;
5565         s32 value;
5566         int res;
5567
5568         res = thermal_get_sensor(idx, &value);
5569         if (res)
5570                 return res;
5571         if (value == TP_EC_THERMAL_TMP_NA * 1000)
5572                 return -ENXIO;
5573
5574         return snprintf(buf, PAGE_SIZE, "%d\n", value);
5575 }
5576
5577 #define THERMAL_SENSOR_ATTR_TEMP(_idxA, _idxB) \
5578          SENSOR_ATTR(temp##_idxA##_input, S_IRUGO, \
5579                      thermal_temp_input_show, NULL, _idxB)
5580
5581 static struct sensor_device_attribute sensor_dev_attr_thermal_temp_input[] = {
5582         THERMAL_SENSOR_ATTR_TEMP(1, 0),
5583         THERMAL_SENSOR_ATTR_TEMP(2, 1),
5584         THERMAL_SENSOR_ATTR_TEMP(3, 2),
5585         THERMAL_SENSOR_ATTR_TEMP(4, 3),
5586         THERMAL_SENSOR_ATTR_TEMP(5, 4),
5587         THERMAL_SENSOR_ATTR_TEMP(6, 5),
5588         THERMAL_SENSOR_ATTR_TEMP(7, 6),
5589         THERMAL_SENSOR_ATTR_TEMP(8, 7),
5590         THERMAL_SENSOR_ATTR_TEMP(9, 8),
5591         THERMAL_SENSOR_ATTR_TEMP(10, 9),
5592         THERMAL_SENSOR_ATTR_TEMP(11, 10),
5593         THERMAL_SENSOR_ATTR_TEMP(12, 11),
5594         THERMAL_SENSOR_ATTR_TEMP(13, 12),
5595         THERMAL_SENSOR_ATTR_TEMP(14, 13),
5596         THERMAL_SENSOR_ATTR_TEMP(15, 14),
5597         THERMAL_SENSOR_ATTR_TEMP(16, 15),
5598 };
5599
5600 #define THERMAL_ATTRS(X) \
5601         &sensor_dev_attr_thermal_temp_input[X].dev_attr.attr
5602
5603 static struct attribute *thermal_temp_input_attr[] = {
5604         THERMAL_ATTRS(8),
5605         THERMAL_ATTRS(9),
5606         THERMAL_ATTRS(10),
5607         THERMAL_ATTRS(11),
5608         THERMAL_ATTRS(12),
5609         THERMAL_ATTRS(13),
5610         THERMAL_ATTRS(14),
5611         THERMAL_ATTRS(15),
5612         THERMAL_ATTRS(0),
5613         THERMAL_ATTRS(1),
5614         THERMAL_ATTRS(2),
5615         THERMAL_ATTRS(3),
5616         THERMAL_ATTRS(4),
5617         THERMAL_ATTRS(5),
5618         THERMAL_ATTRS(6),
5619         THERMAL_ATTRS(7),
5620         NULL
5621 };
5622
5623 static const struct attribute_group thermal_temp_input16_group = {
5624         .attrs = thermal_temp_input_attr
5625 };
5626
5627 static const struct attribute_group thermal_temp_input8_group = {
5628         .attrs = &thermal_temp_input_attr[8]
5629 };
5630
5631 #undef THERMAL_SENSOR_ATTR_TEMP
5632 #undef THERMAL_ATTRS
5633
5634 /* --------------------------------------------------------------------- */
5635
5636 static int __init thermal_init(struct ibm_init_struct *iibm)
5637 {
5638         u8 t, ta1, ta2;
5639         int i;
5640         int acpi_tmp7;
5641         int res;
5642
5643         vdbg_printk(TPACPI_DBG_INIT, "initializing thermal subdriver\n");
5644
5645         acpi_tmp7 = acpi_evalf(ec_handle, NULL, "TMP7", "qv");
5646
5647         if (thinkpad_id.ec_model) {
5648                 /*
5649                  * Direct EC access mode: sensors at registers
5650                  * 0x78-0x7F, 0xC0-0xC7.  Registers return 0x00 for
5651                  * non-implemented, thermal sensors return 0x80 when
5652                  * not available
5653                  */
5654
5655                 ta1 = ta2 = 0;
5656                 for (i = 0; i < 8; i++) {
5657                         if (acpi_ec_read(TP_EC_THERMAL_TMP0 + i, &t)) {
5658                                 ta1 |= t;
5659                         } else {
5660                                 ta1 = 0;
5661                                 break;
5662                         }
5663                         if (acpi_ec_read(TP_EC_THERMAL_TMP8 + i, &t)) {
5664                                 ta2 |= t;
5665                         } else {
5666                                 ta1 = 0;
5667                                 break;
5668                         }
5669                 }
5670                 if (ta1 == 0) {
5671                         /* This is sheer paranoia, but we handle it anyway */
5672                         if (acpi_tmp7) {
5673                                 printk(TPACPI_ERR
5674                                        "ThinkPad ACPI EC access misbehaving, "
5675                                        "falling back to ACPI TMPx access "
5676                                        "mode\n");
5677                                 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
5678                         } else {
5679                                 printk(TPACPI_ERR
5680                                        "ThinkPad ACPI EC access misbehaving, "
5681                                        "disabling thermal sensors access\n");
5682                                 thermal_read_mode = TPACPI_THERMAL_NONE;
5683                         }
5684                 } else {
5685                         thermal_read_mode =
5686                             (ta2 != 0) ?
5687                             TPACPI_THERMAL_TPEC_16 : TPACPI_THERMAL_TPEC_8;
5688                 }
5689         } else if (acpi_tmp7) {
5690                 if (acpi_evalf(ec_handle, NULL, "UPDT", "qv")) {
5691                         /* 600e/x, 770e, 770x */
5692                         thermal_read_mode = TPACPI_THERMAL_ACPI_UPDT;
5693                 } else {
5694                         /* Standard ACPI TMPx access, max 8 sensors */
5695                         thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
5696                 }
5697         } else {
5698                 /* temperatures not supported on 570, G4x, R30, R31, R32 */
5699                 thermal_read_mode = TPACPI_THERMAL_NONE;
5700         }
5701
5702         vdbg_printk(TPACPI_DBG_INIT, "thermal is %s, mode %d\n",
5703                 str_supported(thermal_read_mode != TPACPI_THERMAL_NONE),
5704                 thermal_read_mode);
5705
5706         switch (thermal_read_mode) {
5707         case TPACPI_THERMAL_TPEC_16:
5708                 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
5709                                 &thermal_temp_input16_group);
5710                 if (res)
5711                         return res;
5712                 break;
5713         case TPACPI_THERMAL_TPEC_8:
5714         case TPACPI_THERMAL_ACPI_TMP07:
5715         case TPACPI_THERMAL_ACPI_UPDT:
5716                 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
5717                                 &thermal_temp_input8_group);
5718                 if (res)
5719                         return res;
5720                 break;
5721         case TPACPI_THERMAL_NONE:
5722         default:
5723                 return 1;
5724         }
5725
5726         return 0;
5727 }
5728
5729 static void thermal_exit(void)
5730 {
5731         switch (thermal_read_mode) {
5732         case TPACPI_THERMAL_TPEC_16:
5733                 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
5734                                    &thermal_temp_input16_group);
5735                 break;
5736         case TPACPI_THERMAL_TPEC_8:
5737         case TPACPI_THERMAL_ACPI_TMP07:
5738         case TPACPI_THERMAL_ACPI_UPDT:
5739                 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
5740                                    &thermal_temp_input16_group);
5741                 break;
5742         case TPACPI_THERMAL_NONE:
5743         default:
5744                 break;
5745         }
5746 }
5747
5748 static int thermal_read(char *p)
5749 {
5750         int len = 0;
5751         int n, i;
5752         struct ibm_thermal_sensors_struct t;
5753
5754         n = thermal_get_sensors(&t);
5755         if (unlikely(n < 0))
5756                 return n;
5757
5758         len += sprintf(p + len, "temperatures:\t");
5759
5760         if (n > 0) {
5761                 for (i = 0; i < (n - 1); i++)
5762                         len += sprintf(p + len, "%d ", t.temp[i] / 1000);
5763                 len += sprintf(p + len, "%d\n", t.temp[i] / 1000);
5764         } else
5765                 len += sprintf(p + len, "not supported\n");
5766
5767         return len;
5768 }
5769
5770 static struct ibm_struct thermal_driver_data = {
5771         .name = "thermal",
5772         .read = thermal_read,
5773         .exit = thermal_exit,
5774 };
5775
5776 /*************************************************************************
5777  * EC Dump subdriver
5778  */
5779
5780 static u8 ecdump_regs[256];
5781
5782 static int ecdump_read(char *p)
5783 {
5784         int len = 0;
5785         int i, j;
5786         u8 v;
5787
5788         len += sprintf(p + len, "EC      "
5789                        " +00 +01 +02 +03 +04 +05 +06 +07"
5790                        " +08 +09 +0a +0b +0c +0d +0e +0f\n");
5791         for (i = 0; i < 256; i += 16) {
5792                 len += sprintf(p + len, "EC 0x%02x:", i);
5793                 for (j = 0; j < 16; j++) {
5794                         if (!acpi_ec_read(i + j, &v))
5795                                 break;
5796                         if (v != ecdump_regs[i + j])
5797                                 len += sprintf(p + len, " *%02x", v);
5798                         else
5799                                 len += sprintf(p + len, "  %02x", v);
5800                         ecdump_regs[i + j] = v;
5801                 }
5802                 len += sprintf(p + len, "\n");
5803                 if (j != 16)
5804                         break;
5805         }
5806
5807         /* These are way too dangerous to advertise openly... */
5808 #if 0
5809         len += sprintf(p + len, "commands:\t0x<offset> 0x<value>"
5810                        " (<offset> is 00-ff, <value> is 00-ff)\n");
5811         len += sprintf(p + len, "commands:\t0x<offset> <value>  "
5812                        " (<offset> is 00-ff, <value> is 0-255)\n");
5813 #endif
5814         return len;
5815 }
5816
5817 static int ecdump_write(char *buf)
5818 {
5819         char *cmd;
5820         int i, v;
5821
5822         while ((cmd = next_cmd(&buf))) {
5823                 if (sscanf(cmd, "0x%x 0x%x", &i, &v) == 2) {
5824                         /* i and v set */
5825                 } else if (sscanf(cmd, "0x%x %u", &i, &v) == 2) {
5826                         /* i and v set */
5827                 } else
5828                         return -EINVAL;
5829                 if (i >= 0 && i < 256 && v >= 0 && v < 256) {
5830                         if (!acpi_ec_write(i, v))
5831                                 return -EIO;
5832                 } else
5833                         return -EINVAL;
5834         }
5835
5836         return 0;
5837 }
5838
5839 static struct ibm_struct ecdump_driver_data = {
5840         .name = "ecdump",
5841         .read = ecdump_read,
5842         .write = ecdump_write,
5843         .flags.experimental = 1,
5844 };
5845
5846 /*************************************************************************
5847  * Backlight/brightness subdriver
5848  */
5849
5850 #define TPACPI_BACKLIGHT_DEV_NAME "thinkpad_screen"
5851
5852 /*
5853  * ThinkPads can read brightness from two places: EC HBRV (0x31), or
5854  * CMOS NVRAM byte 0x5E, bits 0-3.
5855  *
5856  * EC HBRV (0x31) has the following layout
5857  *   Bit 7: unknown function
5858  *   Bit 6: unknown function
5859  *   Bit 5: Z: honour scale changes, NZ: ignore scale changes
5860  *   Bit 4: must be set to zero to avoid problems
5861  *   Bit 3-0: backlight brightness level
5862  *
5863  * brightness_get_raw returns status data in the HBRV layout
5864  *
5865  * WARNING: The X61 has been verified to use HBRV for something else, so
5866  * this should be used _only_ on IBM ThinkPads, and maybe with some careful
5867  * testing on the very early *60 Lenovo models...
5868  */
5869
5870 enum {
5871         TP_EC_BACKLIGHT = 0x31,
5872
5873         /* TP_EC_BACKLIGHT bitmasks */
5874         TP_EC_BACKLIGHT_LVLMSK = 0x1F,
5875         TP_EC_BACKLIGHT_CMDMSK = 0xE0,
5876         TP_EC_BACKLIGHT_MAPSW = 0x20,
5877 };
5878
5879 enum tpacpi_brightness_access_mode {
5880         TPACPI_BRGHT_MODE_AUTO = 0,     /* Not implemented yet */
5881         TPACPI_BRGHT_MODE_EC,           /* EC control */
5882         TPACPI_BRGHT_MODE_UCMS_STEP,    /* UCMS step-based control */
5883         TPACPI_BRGHT_MODE_ECNVRAM,      /* EC control w/ NVRAM store */
5884         TPACPI_BRGHT_MODE_MAX
5885 };
5886
5887 static struct backlight_device *ibm_backlight_device;
5888
5889 static enum tpacpi_brightness_access_mode brightness_mode =
5890                 TPACPI_BRGHT_MODE_MAX;
5891
5892 static unsigned int brightness_enable = 2; /* 2 = auto, 0 = no, 1 = yes */
5893
5894 static struct mutex brightness_mutex;
5895
5896 /* NVRAM brightness access,
5897  * call with brightness_mutex held! */
5898 static unsigned int tpacpi_brightness_nvram_get(void)
5899 {
5900         u8 lnvram;
5901
5902         lnvram = (nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS)
5903                   & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
5904                   >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
5905         lnvram &= (tp_features.bright_16levels) ? 0x0f : 0x07;
5906
5907         return lnvram;
5908 }
5909
5910 static void tpacpi_brightness_checkpoint_nvram(void)
5911 {
5912         u8 lec = 0;
5913         u8 b_nvram;
5914
5915         if (brightness_mode != TPACPI_BRGHT_MODE_ECNVRAM)
5916                 return;
5917
5918         vdbg_printk(TPACPI_DBG_BRGHT,
5919                 "trying to checkpoint backlight level to NVRAM...\n");
5920
5921         if (mutex_lock_killable(&brightness_mutex) < 0)
5922                 return;
5923
5924         if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
5925                 goto unlock;
5926         lec &= TP_EC_BACKLIGHT_LVLMSK;
5927         b_nvram = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS);
5928
5929         if (lec != ((b_nvram & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
5930                              >> TP_NVRAM_POS_LEVEL_BRIGHTNESS)) {
5931                 /* NVRAM needs update */
5932                 b_nvram &= ~(TP_NVRAM_MASK_LEVEL_BRIGHTNESS <<
5933                                 TP_NVRAM_POS_LEVEL_BRIGHTNESS);
5934                 b_nvram |= lec;
5935                 nvram_write_byte(b_nvram, TP_NVRAM_ADDR_BRIGHTNESS);
5936                 dbg_printk(TPACPI_DBG_BRGHT,
5937                            "updated NVRAM backlight level to %u (0x%02x)\n",
5938                            (unsigned int) lec, (unsigned int) b_nvram);
5939         } else
5940                 vdbg_printk(TPACPI_DBG_BRGHT,
5941                            "NVRAM backlight level already is %u (0x%02x)\n",
5942                            (unsigned int) lec, (unsigned int) b_nvram);
5943
5944 unlock:
5945         mutex_unlock(&brightness_mutex);
5946 }
5947
5948
5949 /* call with brightness_mutex held! */
5950 static int tpacpi_brightness_get_raw(int *status)
5951 {
5952         u8 lec = 0;
5953
5954         switch (brightness_mode) {
5955         case TPACPI_BRGHT_MODE_UCMS_STEP:
5956                 *status = tpacpi_brightness_nvram_get();
5957                 return 0;
5958         case TPACPI_BRGHT_MODE_EC:
5959         case TPACPI_BRGHT_MODE_ECNVRAM:
5960                 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
5961                         return -EIO;
5962                 *status = lec;
5963                 return 0;
5964         default:
5965                 return -ENXIO;
5966         }
5967 }
5968
5969 /* call with brightness_mutex held! */
5970 /* do NOT call with illegal backlight level value */
5971 static int tpacpi_brightness_set_ec(unsigned int value)
5972 {
5973         u8 lec = 0;
5974
5975         if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
5976                 return -EIO;
5977
5978         if (unlikely(!acpi_ec_write(TP_EC_BACKLIGHT,
5979                                 (lec & TP_EC_BACKLIGHT_CMDMSK) |
5980                                 (value & TP_EC_BACKLIGHT_LVLMSK))))
5981                 return -EIO;
5982
5983         return 0;
5984 }
5985
5986 /* call with brightness_mutex held! */
5987 static int tpacpi_brightness_set_ucmsstep(unsigned int value)
5988 {
5989         int cmos_cmd, inc;
5990         unsigned int current_value, i;
5991
5992         current_value = tpacpi_brightness_nvram_get();
5993
5994         if (value == current_value)
5995                 return 0;
5996
5997         cmos_cmd = (value > current_value) ?
5998                         TP_CMOS_BRIGHTNESS_UP :
5999                         TP_CMOS_BRIGHTNESS_DOWN;
6000         inc = (value > current_value) ? 1 : -1;
6001
6002         for (i = current_value; i != value; i += inc)
6003                 if (issue_thinkpad_cmos_command(cmos_cmd))
6004                         return -EIO;
6005
6006         return 0;
6007 }
6008
6009 /* May return EINTR which can always be mapped to ERESTARTSYS */
6010 static int brightness_set(unsigned int value)
6011 {
6012         int res;
6013
6014         if (value > ((tp_features.bright_16levels)? 15 : 7) ||
6015             value < 0)
6016                 return -EINVAL;
6017
6018         vdbg_printk(TPACPI_DBG_BRGHT,
6019                         "set backlight level to %d\n", value);
6020
6021         res = mutex_lock_killable(&brightness_mutex);
6022         if (res < 0)
6023                 return res;
6024
6025         switch (brightness_mode) {
6026         case TPACPI_BRGHT_MODE_EC:
6027         case TPACPI_BRGHT_MODE_ECNVRAM:
6028                 res = tpacpi_brightness_set_ec(value);
6029                 break;
6030         case TPACPI_BRGHT_MODE_UCMS_STEP:
6031                 res = tpacpi_brightness_set_ucmsstep(value);
6032                 break;
6033         default:
6034                 res = -ENXIO;
6035         }
6036
6037         mutex_unlock(&brightness_mutex);
6038         return res;
6039 }
6040
6041 /* sysfs backlight class ----------------------------------------------- */
6042
6043 static int brightness_update_status(struct backlight_device *bd)
6044 {
6045         unsigned int level =
6046                 (bd->props.fb_blank == FB_BLANK_UNBLANK &&
6047                  bd->props.power == FB_BLANK_UNBLANK) ?
6048                                 bd->props.brightness : 0;
6049
6050         dbg_printk(TPACPI_DBG_BRGHT,
6051                         "backlight: attempt to set level to %d\n",
6052                         level);
6053
6054         /* it is the backlight class's job (caller) to handle
6055          * EINTR and other errors properly */
6056         return brightness_set(level);
6057 }
6058
6059 static int brightness_get(struct backlight_device *bd)
6060 {
6061         int status, res;
6062
6063         res = mutex_lock_killable(&brightness_mutex);
6064         if (res < 0)
6065                 return 0;
6066
6067         res = tpacpi_brightness_get_raw(&status);
6068
6069         mutex_unlock(&brightness_mutex);
6070
6071         if (res < 0)
6072                 return 0;
6073
6074         return status & TP_EC_BACKLIGHT_LVLMSK;
6075 }
6076
6077 static void tpacpi_brightness_notify_change(void)
6078 {
6079         backlight_force_update(ibm_backlight_device,
6080                                BACKLIGHT_UPDATE_HOTKEY);
6081 }
6082
6083 static struct backlight_ops ibm_backlight_data = {
6084         .get_brightness = brightness_get,
6085         .update_status  = brightness_update_status,
6086 };
6087
6088 /* --------------------------------------------------------------------- */
6089
6090 /*
6091  * These are only useful for models that have only one possibility
6092  * of GPU.  If the BIOS model handles both ATI and Intel, don't use
6093  * these quirks.
6094  */
6095 #define TPACPI_BRGHT_Q_NOEC     0x0001  /* Must NOT use EC HBRV */
6096 #define TPACPI_BRGHT_Q_EC       0x0002  /* Should or must use EC HBRV */
6097 #define TPACPI_BRGHT_Q_ASK      0x8000  /* Ask for user report */
6098
6099 static const struct tpacpi_quirk brightness_quirk_table[] __initconst = {
6100         /* Models with ATI GPUs known to require ECNVRAM mode */
6101         TPACPI_Q_IBM('1', 'Y', TPACPI_BRGHT_Q_EC),      /* T43/p ATI */
6102
6103         /* Models with ATI GPUs that can use ECNVRAM */
6104         TPACPI_Q_IBM('1', 'R', TPACPI_BRGHT_Q_EC),
6105         TPACPI_Q_IBM('1', 'Q', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
6106         TPACPI_Q_IBM('7', '6', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
6107         TPACPI_Q_IBM('7', '8', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
6108
6109         /* Models with Intel Extreme Graphics 2 */
6110         TPACPI_Q_IBM('1', 'U', TPACPI_BRGHT_Q_NOEC),
6111         TPACPI_Q_IBM('1', 'V', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
6112         TPACPI_Q_IBM('1', 'W', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
6113
6114         /* Models with Intel GMA900 */
6115         TPACPI_Q_IBM('7', '0', TPACPI_BRGHT_Q_NOEC),    /* T43, R52 */
6116         TPACPI_Q_IBM('7', '4', TPACPI_BRGHT_Q_NOEC),    /* X41 */
6117         TPACPI_Q_IBM('7', '5', TPACPI_BRGHT_Q_NOEC),    /* X41 Tablet */
6118 };
6119
6120 static int __init brightness_init(struct ibm_init_struct *iibm)
6121 {
6122         int b;
6123         unsigned long quirks;
6124
6125         vdbg_printk(TPACPI_DBG_INIT, "initializing brightness subdriver\n");
6126
6127         mutex_init(&brightness_mutex);
6128
6129         quirks = tpacpi_check_quirks(brightness_quirk_table,
6130                                 ARRAY_SIZE(brightness_quirk_table));
6131
6132         /*
6133          * We always attempt to detect acpi support, so as to switch
6134          * Lenovo Vista BIOS to ACPI brightness mode even if we are not
6135          * going to publish a backlight interface
6136          */
6137         b = tpacpi_check_std_acpi_brightness_support();
6138         if (b > 0) {
6139
6140                 if (acpi_video_backlight_support()) {
6141                         if (brightness_enable > 1) {
6142                                 printk(TPACPI_NOTICE
6143                                        "Standard ACPI backlight interface "
6144                                        "available, not loading native one.\n");
6145                                 return 1;
6146                         } else if (brightness_enable == 1) {
6147                                 printk(TPACPI_NOTICE
6148                                        "Backlight control force enabled, even if standard "
6149                                        "ACPI backlight interface is available\n");
6150                         }
6151                 } else {
6152                         if (brightness_enable > 1) {
6153                                 printk(TPACPI_NOTICE
6154                                        "Standard ACPI backlight interface not "
6155                                        "available, thinkpad_acpi native "
6156                                        "brightness control enabled\n");
6157                         }
6158                 }
6159         }
6160
6161         if (!brightness_enable) {
6162                 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT,
6163                            "brightness support disabled by "
6164                            "module parameter\n");
6165                 return 1;
6166         }
6167
6168         if (b > 16) {
6169                 printk(TPACPI_ERR
6170                        "Unsupported brightness interface, "
6171                        "please contact %s\n", TPACPI_MAIL);
6172                 return 1;
6173         }
6174         if (b == 16)
6175                 tp_features.bright_16levels = 1;
6176
6177         /*
6178          * Check for module parameter bogosity, note that we
6179          * init brightness_mode to TPACPI_BRGHT_MODE_MAX in order to be
6180          * able to detect "unspecified"
6181          */
6182         if (brightness_mode > TPACPI_BRGHT_MODE_MAX)
6183                 return -EINVAL;
6184
6185         /* TPACPI_BRGHT_MODE_AUTO not implemented yet, just use default */
6186         if (brightness_mode == TPACPI_BRGHT_MODE_AUTO ||
6187             brightness_mode == TPACPI_BRGHT_MODE_MAX) {
6188                 if (quirks & TPACPI_BRGHT_Q_EC)
6189                         brightness_mode = TPACPI_BRGHT_MODE_ECNVRAM;
6190                 else
6191                         brightness_mode = TPACPI_BRGHT_MODE_UCMS_STEP;
6192
6193                 dbg_printk(TPACPI_DBG_BRGHT,
6194                            "driver auto-selected brightness_mode=%d\n",
6195                            brightness_mode);
6196         }
6197
6198         /* Safety */
6199         if (thinkpad_id.vendor != PCI_VENDOR_ID_IBM &&
6200             (brightness_mode == TPACPI_BRGHT_MODE_ECNVRAM ||
6201              brightness_mode == TPACPI_BRGHT_MODE_EC))
6202                 return -EINVAL;
6203
6204         if (tpacpi_brightness_get_raw(&b) < 0)
6205                 return 1;
6206
6207         if (tp_features.bright_16levels)
6208                 printk(TPACPI_INFO
6209                        "detected a 16-level brightness capable ThinkPad\n");
6210
6211         ibm_backlight_device = backlight_device_register(
6212                                         TPACPI_BACKLIGHT_DEV_NAME, NULL, NULL,
6213                                         &ibm_backlight_data);
6214         if (IS_ERR(ibm_backlight_device)) {
6215                 int rc = PTR_ERR(ibm_backlight_device);
6216                 ibm_backlight_device = NULL;
6217                 printk(TPACPI_ERR "Could not register backlight device\n");
6218                 return rc;
6219         }
6220         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT,
6221                         "brightness is supported\n");
6222
6223         if (quirks & TPACPI_BRGHT_Q_ASK) {
6224                 printk(TPACPI_NOTICE
6225                         "brightness: will use unverified default: "
6226                         "brightness_mode=%d\n", brightness_mode);
6227                 printk(TPACPI_NOTICE
6228                         "brightness: please report to %s whether it works well "
6229                         "or not on your ThinkPad\n", TPACPI_MAIL);
6230         }
6231
6232         ibm_backlight_device->props.max_brightness =
6233                                 (tp_features.bright_16levels)? 15 : 7;
6234         ibm_backlight_device->props.brightness = b & TP_EC_BACKLIGHT_LVLMSK;
6235         backlight_update_status(ibm_backlight_device);
6236
6237         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT,
6238                         "brightness: registering brightness hotkeys "
6239                         "as change notification\n");
6240         tpacpi_hotkey_driver_mask_set(hotkey_driver_mask
6241                                 | TP_ACPI_HKEY_BRGHTUP_MASK
6242                                 | TP_ACPI_HKEY_BRGHTDWN_MASK);;
6243         return 0;
6244 }
6245
6246 static void brightness_suspend(pm_message_t state)
6247 {
6248         tpacpi_brightness_checkpoint_nvram();
6249 }
6250
6251 static void brightness_shutdown(void)
6252 {
6253         tpacpi_brightness_checkpoint_nvram();
6254 }
6255
6256 static v