7b828680b21d84315d657fedac17a274142a2930
[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 pr_fmt(fmt) KBUILD_MODNAME ": " fmt
25
26 #define TPACPI_VERSION "0.24"
27 #define TPACPI_SYSFS_VERSION 0x020700
28
29 /*
30  *  Changelog:
31  *  2007-10-20          changelog trimmed down
32  *
33  *  2007-03-27  0.14    renamed to thinkpad_acpi and moved to
34  *                      drivers/misc.
35  *
36  *  2006-11-22  0.13    new maintainer
37  *                      changelog now lives in git commit history, and will
38  *                      not be updated further in-file.
39  *
40  *  2005-03-17  0.11    support for 600e, 770x
41  *                          thanks to Jamie Lentin <lentinj@dial.pipex.com>
42  *
43  *  2005-01-16  0.9     use MODULE_VERSION
44  *                          thanks to Henrik Brix Andersen <brix@gentoo.org>
45  *                      fix parameter passing on module loading
46  *                          thanks to Rusty Russell <rusty@rustcorp.com.au>
47  *                          thanks to Jim Radford <radford@blackbean.org>
48  *  2004-11-08  0.8     fix init error case, don't return from a macro
49  *                          thanks to Chris Wright <chrisw@osdl.org>
50  */
51
52 #include <linux/kernel.h>
53 #include <linux/module.h>
54 #include <linux/init.h>
55 #include <linux/types.h>
56 #include <linux/string.h>
57 #include <linux/list.h>
58 #include <linux/mutex.h>
59 #include <linux/sched.h>
60 #include <linux/kthread.h>
61 #include <linux/freezer.h>
62 #include <linux/delay.h>
63 #include <linux/slab.h>
64
65 #include <linux/nvram.h>
66 #include <linux/proc_fs.h>
67 #include <linux/seq_file.h>
68 #include <linux/sysfs.h>
69 #include <linux/backlight.h>
70 #include <linux/fb.h>
71 #include <linux/platform_device.h>
72 #include <linux/hwmon.h>
73 #include <linux/hwmon-sysfs.h>
74 #include <linux/input.h>
75 #include <linux/leds.h>
76 #include <linux/rfkill.h>
77 #include <asm/uaccess.h>
78
79 #include <linux/dmi.h>
80 #include <linux/jiffies.h>
81 #include <linux/workqueue.h>
82
83 #include <sound/core.h>
84 #include <sound/control.h>
85 #include <sound/initval.h>
86
87 #include <acpi/acpi_drivers.h>
88
89 #include <linux/pci_ids.h>
90
91
92 /* ThinkPad CMOS commands */
93 #define TP_CMOS_VOLUME_DOWN     0
94 #define TP_CMOS_VOLUME_UP       1
95 #define TP_CMOS_VOLUME_MUTE     2
96 #define TP_CMOS_BRIGHTNESS_UP   4
97 #define TP_CMOS_BRIGHTNESS_DOWN 5
98 #define TP_CMOS_THINKLIGHT_ON   12
99 #define TP_CMOS_THINKLIGHT_OFF  13
100
101 /* NVRAM Addresses */
102 enum tp_nvram_addr {
103         TP_NVRAM_ADDR_HK2               = 0x57,
104         TP_NVRAM_ADDR_THINKLIGHT        = 0x58,
105         TP_NVRAM_ADDR_VIDEO             = 0x59,
106         TP_NVRAM_ADDR_BRIGHTNESS        = 0x5e,
107         TP_NVRAM_ADDR_MIXER             = 0x60,
108 };
109
110 /* NVRAM bit masks */
111 enum {
112         TP_NVRAM_MASK_HKT_THINKPAD      = 0x08,
113         TP_NVRAM_MASK_HKT_ZOOM          = 0x20,
114         TP_NVRAM_MASK_HKT_DISPLAY       = 0x40,
115         TP_NVRAM_MASK_HKT_HIBERNATE     = 0x80,
116         TP_NVRAM_MASK_THINKLIGHT        = 0x10,
117         TP_NVRAM_MASK_HKT_DISPEXPND     = 0x30,
118         TP_NVRAM_MASK_HKT_BRIGHTNESS    = 0x20,
119         TP_NVRAM_MASK_LEVEL_BRIGHTNESS  = 0x0f,
120         TP_NVRAM_POS_LEVEL_BRIGHTNESS   = 0,
121         TP_NVRAM_MASK_MUTE              = 0x40,
122         TP_NVRAM_MASK_HKT_VOLUME        = 0x80,
123         TP_NVRAM_MASK_LEVEL_VOLUME      = 0x0f,
124         TP_NVRAM_POS_LEVEL_VOLUME       = 0,
125 };
126
127 /* Misc NVRAM-related */
128 enum {
129         TP_NVRAM_LEVEL_VOLUME_MAX = 14,
130 };
131
132 /* ACPI HIDs */
133 #define TPACPI_ACPI_IBM_HKEY_HID        "IBM0068"
134 #define TPACPI_ACPI_LENOVO_HKEY_HID     "LEN0068"
135 #define TPACPI_ACPI_EC_HID              "PNP0C09"
136
137 /* Input IDs */
138 #define TPACPI_HKEY_INPUT_PRODUCT       0x5054 /* "TP" */
139 #define TPACPI_HKEY_INPUT_VERSION       0x4101
140
141 /* ACPI \WGSV commands */
142 enum {
143         TP_ACPI_WGSV_GET_STATE          = 0x01, /* Get state information */
144         TP_ACPI_WGSV_PWR_ON_ON_RESUME   = 0x02, /* Resume WWAN powered on */
145         TP_ACPI_WGSV_PWR_OFF_ON_RESUME  = 0x03, /* Resume WWAN powered off */
146         TP_ACPI_WGSV_SAVE_STATE         = 0x04, /* Save state for S4/S5 */
147 };
148
149 /* TP_ACPI_WGSV_GET_STATE bits */
150 enum {
151         TP_ACPI_WGSV_STATE_WWANEXIST    = 0x0001, /* WWAN hw available */
152         TP_ACPI_WGSV_STATE_WWANPWR      = 0x0002, /* WWAN radio enabled */
153         TP_ACPI_WGSV_STATE_WWANPWRRES   = 0x0004, /* WWAN state at resume */
154         TP_ACPI_WGSV_STATE_WWANBIOSOFF  = 0x0008, /* WWAN disabled in BIOS */
155         TP_ACPI_WGSV_STATE_BLTHEXIST    = 0x0001, /* BLTH hw available */
156         TP_ACPI_WGSV_STATE_BLTHPWR      = 0x0002, /* BLTH radio enabled */
157         TP_ACPI_WGSV_STATE_BLTHPWRRES   = 0x0004, /* BLTH state at resume */
158         TP_ACPI_WGSV_STATE_BLTHBIOSOFF  = 0x0008, /* BLTH disabled in BIOS */
159         TP_ACPI_WGSV_STATE_UWBEXIST     = 0x0010, /* UWB hw available */
160         TP_ACPI_WGSV_STATE_UWBPWR       = 0x0020, /* UWB radio enabled */
161 };
162
163 /* HKEY events */
164 enum tpacpi_hkey_event_t {
165         /* Hotkey-related */
166         TP_HKEY_EV_HOTKEY_BASE          = 0x1001, /* first hotkey (FN+F1) */
167         TP_HKEY_EV_BRGHT_UP             = 0x1010, /* Brightness up */
168         TP_HKEY_EV_BRGHT_DOWN           = 0x1011, /* Brightness down */
169         TP_HKEY_EV_VOL_UP               = 0x1015, /* Volume up or unmute */
170         TP_HKEY_EV_VOL_DOWN             = 0x1016, /* Volume down or unmute */
171         TP_HKEY_EV_VOL_MUTE             = 0x1017, /* Mixer output mute */
172
173         /* Reasons for waking up from S3/S4 */
174         TP_HKEY_EV_WKUP_S3_UNDOCK       = 0x2304, /* undock requested, S3 */
175         TP_HKEY_EV_WKUP_S4_UNDOCK       = 0x2404, /* undock requested, S4 */
176         TP_HKEY_EV_WKUP_S3_BAYEJ        = 0x2305, /* bay ejection req, S3 */
177         TP_HKEY_EV_WKUP_S4_BAYEJ        = 0x2405, /* bay ejection req, S4 */
178         TP_HKEY_EV_WKUP_S3_BATLOW       = 0x2313, /* battery empty, S3 */
179         TP_HKEY_EV_WKUP_S4_BATLOW       = 0x2413, /* battery empty, S4 */
180
181         /* Auto-sleep after eject request */
182         TP_HKEY_EV_BAYEJ_ACK            = 0x3003, /* bay ejection complete */
183         TP_HKEY_EV_UNDOCK_ACK           = 0x4003, /* undock complete */
184
185         /* Misc bay events */
186         TP_HKEY_EV_OPTDRV_EJ            = 0x3006, /* opt. drive tray ejected */
187         TP_HKEY_EV_HOTPLUG_DOCK         = 0x4010, /* docked into hotplug dock
188                                                      or port replicator */
189         TP_HKEY_EV_HOTPLUG_UNDOCK       = 0x4011, /* undocked from hotplug
190                                                      dock or port replicator */
191
192         /* User-interface events */
193         TP_HKEY_EV_LID_CLOSE            = 0x5001, /* laptop lid closed */
194         TP_HKEY_EV_LID_OPEN             = 0x5002, /* laptop lid opened */
195         TP_HKEY_EV_TABLET_TABLET        = 0x5009, /* tablet swivel up */
196         TP_HKEY_EV_TABLET_NOTEBOOK      = 0x500a, /* tablet swivel down */
197         TP_HKEY_EV_PEN_INSERTED         = 0x500b, /* tablet pen inserted */
198         TP_HKEY_EV_PEN_REMOVED          = 0x500c, /* tablet pen removed */
199         TP_HKEY_EV_BRGHT_CHANGED        = 0x5010, /* backlight control event */
200
201         /* Key-related user-interface events */
202         TP_HKEY_EV_KEY_NUMLOCK          = 0x6000, /* NumLock key pressed */
203         TP_HKEY_EV_KEY_FN               = 0x6005, /* Fn key pressed? E420 */
204
205         /* Thermal events */
206         TP_HKEY_EV_ALARM_BAT_HOT        = 0x6011, /* battery too hot */
207         TP_HKEY_EV_ALARM_BAT_XHOT       = 0x6012, /* battery critically hot */
208         TP_HKEY_EV_ALARM_SENSOR_HOT     = 0x6021, /* sensor too hot */
209         TP_HKEY_EV_ALARM_SENSOR_XHOT    = 0x6022, /* sensor critically hot */
210         TP_HKEY_EV_THM_TABLE_CHANGED    = 0x6030, /* thermal table changed */
211
212         TP_HKEY_EV_UNK_6040             = 0x6040, /* Related to AC change?
213                                                      some sort of APM hint,
214                                                      W520 */
215
216         /* Misc */
217         TP_HKEY_EV_RFKILL_CHANGED       = 0x7000, /* rfkill switch changed */
218 };
219
220 /****************************************************************************
221  * Main driver
222  */
223
224 #define TPACPI_NAME "thinkpad"
225 #define TPACPI_DESC "ThinkPad ACPI Extras"
226 #define TPACPI_FILE TPACPI_NAME "_acpi"
227 #define TPACPI_URL "http://ibm-acpi.sf.net/"
228 #define TPACPI_MAIL "ibm-acpi-devel@lists.sourceforge.net"
229
230 #define TPACPI_PROC_DIR "ibm"
231 #define TPACPI_ACPI_EVENT_PREFIX "ibm"
232 #define TPACPI_DRVR_NAME TPACPI_FILE
233 #define TPACPI_DRVR_SHORTNAME "tpacpi"
234 #define TPACPI_HWMON_DRVR_NAME TPACPI_NAME "_hwmon"
235
236 #define TPACPI_NVRAM_KTHREAD_NAME "ktpacpi_nvramd"
237 #define TPACPI_WORKQUEUE_NAME "ktpacpid"
238
239 #define TPACPI_MAX_ACPI_ARGS 3
240
241 /* Debugging printk groups */
242 #define TPACPI_DBG_ALL          0xffff
243 #define TPACPI_DBG_DISCLOSETASK 0x8000
244 #define TPACPI_DBG_INIT         0x0001
245 #define TPACPI_DBG_EXIT         0x0002
246 #define TPACPI_DBG_RFKILL       0x0004
247 #define TPACPI_DBG_HKEY         0x0008
248 #define TPACPI_DBG_FAN          0x0010
249 #define TPACPI_DBG_BRGHT        0x0020
250 #define TPACPI_DBG_MIXER        0x0040
251
252 #define onoff(status, bit) ((status) & (1 << (bit)) ? "on" : "off")
253 #define enabled(status, bit) ((status) & (1 << (bit)) ? "enabled" : "disabled")
254 #define strlencmp(a, b) (strncmp((a), (b), strlen(b)))
255
256
257 /****************************************************************************
258  * Driver-wide structs and misc. variables
259  */
260
261 struct ibm_struct;
262
263 struct tp_acpi_drv_struct {
264         const struct acpi_device_id *hid;
265         struct acpi_driver *driver;
266
267         void (*notify) (struct ibm_struct *, u32);
268         acpi_handle *handle;
269         u32 type;
270         struct acpi_device *device;
271 };
272
273 struct ibm_struct {
274         char *name;
275
276         int (*read) (struct seq_file *);
277         int (*write) (char *);
278         void (*exit) (void);
279         void (*resume) (void);
280         void (*suspend) (pm_message_t state);
281         void (*shutdown) (void);
282
283         struct list_head all_drivers;
284
285         struct tp_acpi_drv_struct *acpi;
286
287         struct {
288                 u8 acpi_driver_registered:1;
289                 u8 acpi_notify_installed:1;
290                 u8 proc_created:1;
291                 u8 init_called:1;
292                 u8 experimental:1;
293         } flags;
294 };
295
296 struct ibm_init_struct {
297         char param[32];
298
299         int (*init) (struct ibm_init_struct *);
300         mode_t base_procfs_mode;
301         struct ibm_struct *data;
302 };
303
304 static struct {
305         u32 bluetooth:1;
306         u32 hotkey:1;
307         u32 hotkey_mask:1;
308         u32 hotkey_wlsw:1;
309         u32 hotkey_tablet:1;
310         u32 light:1;
311         u32 light_status:1;
312         u32 bright_acpimode:1;
313         u32 bright_unkfw:1;
314         u32 wan:1;
315         u32 uwb:1;
316         u32 fan_ctrl_status_undef:1;
317         u32 second_fan:1;
318         u32 beep_needs_two_args:1;
319         u32 mixer_no_level_control:1;
320         u32 input_device_registered:1;
321         u32 platform_drv_registered:1;
322         u32 platform_drv_attrs_registered:1;
323         u32 sensors_pdrv_registered:1;
324         u32 sensors_pdrv_attrs_registered:1;
325         u32 sensors_pdev_attrs_registered:1;
326         u32 hotkey_poll_active:1;
327 } tp_features;
328
329 static struct {
330         u16 hotkey_mask_ff:1;
331         u16 volume_ctrl_forbidden:1;
332 } tp_warned;
333
334 struct thinkpad_id_data {
335         unsigned int vendor;    /* ThinkPad vendor:
336                                  * PCI_VENDOR_ID_IBM/PCI_VENDOR_ID_LENOVO */
337
338         char *bios_version_str; /* Something like 1ZET51WW (1.03z) */
339         char *ec_version_str;   /* Something like 1ZHT51WW-1.04a */
340
341         u16 bios_model;         /* 1Y = 0x5931, 0 = unknown */
342         u16 ec_model;
343         u16 bios_release;       /* 1ZETK1WW = 0x314b, 0 = unknown */
344         u16 ec_release;
345
346         char *model_str;        /* ThinkPad T43 */
347         char *nummodel_str;     /* 9384A9C for a 9384-A9C model */
348 };
349 static struct thinkpad_id_data thinkpad_id;
350
351 static enum {
352         TPACPI_LIFE_INIT = 0,
353         TPACPI_LIFE_RUNNING,
354         TPACPI_LIFE_EXITING,
355 } tpacpi_lifecycle;
356
357 static int experimental;
358 static u32 dbg_level;
359
360 static struct workqueue_struct *tpacpi_wq;
361
362 enum led_status_t {
363         TPACPI_LED_OFF = 0,
364         TPACPI_LED_ON,
365         TPACPI_LED_BLINK,
366 };
367
368 /* Special LED class that can defer work */
369 struct tpacpi_led_classdev {
370         struct led_classdev led_classdev;
371         struct work_struct work;
372         enum led_status_t new_state;
373         unsigned int led;
374 };
375
376 /* brightness level capabilities */
377 static unsigned int bright_maxlvl;      /* 0 = unknown */
378
379 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
380 static int dbg_wlswemul;
381 static int tpacpi_wlsw_emulstate;
382 static int dbg_bluetoothemul;
383 static int tpacpi_bluetooth_emulstate;
384 static int dbg_wwanemul;
385 static int tpacpi_wwan_emulstate;
386 static int dbg_uwbemul;
387 static int tpacpi_uwb_emulstate;
388 #endif
389
390
391 /*************************************************************************
392  *  Debugging helpers
393  */
394
395 #define dbg_printk(a_dbg_level, format, arg...)                         \
396 do {                                                                    \
397         if (dbg_level & (a_dbg_level))                                  \
398                 printk(KERN_DEBUG pr_fmt("%s: " format),                \
399                        __func__, ##arg);                                \
400 } while (0)
401
402 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
403 #define vdbg_printk dbg_printk
404 static const char *str_supported(int is_supported);
405 #else
406 static inline const char *str_supported(int is_supported) { return ""; }
407 #define vdbg_printk(a_dbg_level, format, arg...)        \
408         no_printk(format, ##arg)
409 #endif
410
411 static void tpacpi_log_usertask(const char * const what)
412 {
413         printk(KERN_DEBUG pr_fmt("%s: access by process with PID %d\n"),
414                what, task_tgid_vnr(current));
415 }
416
417 #define tpacpi_disclose_usertask(what, format, arg...)                  \
418 do {                                                                    \
419         if (unlikely((dbg_level & TPACPI_DBG_DISCLOSETASK) &&           \
420                      (tpacpi_lifecycle == TPACPI_LIFE_RUNNING))) {      \
421                 printk(KERN_DEBUG pr_fmt("%s: PID %d: " format),        \
422                        what, task_tgid_vnr(current), ## arg);           \
423         }                                                               \
424 } while (0)
425
426 /*
427  * Quirk handling helpers
428  *
429  * ThinkPad IDs and versions seen in the field so far
430  * are two-characters from the set [0-9A-Z], i.e. base 36.
431  *
432  * We use values well outside that range as specials.
433  */
434
435 #define TPACPI_MATCH_ANY                0xffffU
436 #define TPACPI_MATCH_UNKNOWN            0U
437
438 /* TPID('1', 'Y') == 0x5931 */
439 #define TPID(__c1, __c2) (((__c2) << 8) | (__c1))
440
441 #define TPACPI_Q_IBM(__id1, __id2, __quirk)     \
442         { .vendor = PCI_VENDOR_ID_IBM,          \
443           .bios = TPID(__id1, __id2),           \
444           .ec = TPACPI_MATCH_ANY,               \
445           .quirks = (__quirk) }
446
447 #define TPACPI_Q_LNV(__id1, __id2, __quirk)     \
448         { .vendor = PCI_VENDOR_ID_LENOVO,       \
449           .bios = TPID(__id1, __id2),           \
450           .ec = TPACPI_MATCH_ANY,               \
451           .quirks = (__quirk) }
452
453 #define TPACPI_QEC_LNV(__id1, __id2, __quirk)   \
454         { .vendor = PCI_VENDOR_ID_LENOVO,       \
455           .bios = TPACPI_MATCH_ANY,             \
456           .ec = TPID(__id1, __id2),             \
457           .quirks = (__quirk) }
458
459 struct tpacpi_quirk {
460         unsigned int vendor;
461         u16 bios;
462         u16 ec;
463         unsigned long quirks;
464 };
465
466 /**
467  * tpacpi_check_quirks() - search BIOS/EC version on a list
468  * @qlist:              array of &struct tpacpi_quirk
469  * @qlist_size:         number of elements in @qlist
470  *
471  * Iterates over a quirks list until one is found that matches the
472  * ThinkPad's vendor, BIOS and EC model.
473  *
474  * Returns 0 if nothing matches, otherwise returns the quirks field of
475  * the matching &struct tpacpi_quirk entry.
476  *
477  * The match criteria is: vendor, ec and bios much match.
478  */
479 static unsigned long __init tpacpi_check_quirks(
480                         const struct tpacpi_quirk *qlist,
481                         unsigned int qlist_size)
482 {
483         while (qlist_size) {
484                 if ((qlist->vendor == thinkpad_id.vendor ||
485                                 qlist->vendor == TPACPI_MATCH_ANY) &&
486                     (qlist->bios == thinkpad_id.bios_model ||
487                                 qlist->bios == TPACPI_MATCH_ANY) &&
488                     (qlist->ec == thinkpad_id.ec_model ||
489                                 qlist->ec == TPACPI_MATCH_ANY))
490                         return qlist->quirks;
491
492                 qlist_size--;
493                 qlist++;
494         }
495         return 0;
496 }
497
498 static inline bool __pure __init tpacpi_is_lenovo(void)
499 {
500         return thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO;
501 }
502
503 static inline bool __pure __init tpacpi_is_ibm(void)
504 {
505         return thinkpad_id.vendor == PCI_VENDOR_ID_IBM;
506 }
507
508 /****************************************************************************
509  ****************************************************************************
510  *
511  * ACPI Helpers and device model
512  *
513  ****************************************************************************
514  ****************************************************************************/
515
516 /*************************************************************************
517  * ACPI basic handles
518  */
519
520 static acpi_handle root_handle;
521 static acpi_handle ec_handle;
522
523 #define TPACPI_HANDLE(object, parent, paths...)                 \
524         static acpi_handle  object##_handle;                    \
525         static const acpi_handle *object##_parent __initdata =  \
526                                                 &parent##_handle; \
527         static char *object##_paths[] __initdata = { paths }
528
529 TPACPI_HANDLE(ecrd, ec, "ECRD");        /* 570 */
530 TPACPI_HANDLE(ecwr, ec, "ECWR");        /* 570 */
531
532 TPACPI_HANDLE(cmos, root, "\\UCMS",     /* R50, R50e, R50p, R51, */
533                                         /* T4x, X31, X40 */
534            "\\CMOS",            /* A3x, G4x, R32, T23, T30, X22-24, X30 */
535            "\\CMS",             /* R40, R40e */
536            );                   /* all others */
537
538 TPACPI_HANDLE(hkey, ec, "\\_SB.HKEY",   /* 600e/x, 770e, 770x */
539            "^HKEY",             /* R30, R31 */
540            "HKEY",              /* all others */
541            );                   /* 570 */
542
543 /*************************************************************************
544  * ACPI helpers
545  */
546
547 static int acpi_evalf(acpi_handle handle,
548                       void *res, char *method, char *fmt, ...)
549 {
550         char *fmt0 = fmt;
551         struct acpi_object_list params;
552         union acpi_object in_objs[TPACPI_MAX_ACPI_ARGS];
553         struct acpi_buffer result, *resultp;
554         union acpi_object out_obj;
555         acpi_status status;
556         va_list ap;
557         char res_type;
558         int success;
559         int quiet;
560
561         if (!*fmt) {
562                 pr_err("acpi_evalf() called with empty format\n");
563                 return 0;
564         }
565
566         if (*fmt == 'q') {
567                 quiet = 1;
568                 fmt++;
569         } else
570                 quiet = 0;
571
572         res_type = *(fmt++);
573
574         params.count = 0;
575         params.pointer = &in_objs[0];
576
577         va_start(ap, fmt);
578         while (*fmt) {
579                 char c = *(fmt++);
580                 switch (c) {
581                 case 'd':       /* int */
582                         in_objs[params.count].integer.value = va_arg(ap, int);
583                         in_objs[params.count++].type = ACPI_TYPE_INTEGER;
584                         break;
585                         /* add more types as needed */
586                 default:
587                         pr_err("acpi_evalf() called "
588                                "with invalid format character '%c'\n", c);
589                         va_end(ap);
590                         return 0;
591                 }
592         }
593         va_end(ap);
594
595         if (res_type != 'v') {
596                 result.length = sizeof(out_obj);
597                 result.pointer = &out_obj;
598                 resultp = &result;
599         } else
600                 resultp = NULL;
601
602         status = acpi_evaluate_object(handle, method, &params, resultp);
603
604         switch (res_type) {
605         case 'd':               /* int */
606                 success = (status == AE_OK &&
607                            out_obj.type == ACPI_TYPE_INTEGER);
608                 if (success && res)
609                         *(int *)res = out_obj.integer.value;
610                 break;
611         case 'v':               /* void */
612                 success = status == AE_OK;
613                 break;
614                 /* add more types as needed */
615         default:
616                 pr_err("acpi_evalf() called "
617                        "with invalid format character '%c'\n", res_type);
618                 return 0;
619         }
620
621         if (!success && !quiet)
622                 pr_err("acpi_evalf(%s, %s, ...) failed: %s\n",
623                        method, fmt0, acpi_format_exception(status));
624
625         return success;
626 }
627
628 static int acpi_ec_read(int i, u8 *p)
629 {
630         int v;
631
632         if (ecrd_handle) {
633                 if (!acpi_evalf(ecrd_handle, &v, NULL, "dd", i))
634                         return 0;
635                 *p = v;
636         } else {
637                 if (ec_read(i, p) < 0)
638                         return 0;
639         }
640
641         return 1;
642 }
643
644 static int acpi_ec_write(int i, u8 v)
645 {
646         if (ecwr_handle) {
647                 if (!acpi_evalf(ecwr_handle, NULL, NULL, "vdd", i, v))
648                         return 0;
649         } else {
650                 if (ec_write(i, v) < 0)
651                         return 0;
652         }
653
654         return 1;
655 }
656
657 static int issue_thinkpad_cmos_command(int cmos_cmd)
658 {
659         if (!cmos_handle)
660                 return -ENXIO;
661
662         if (!acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd))
663                 return -EIO;
664
665         return 0;
666 }
667
668 /*************************************************************************
669  * ACPI device model
670  */
671
672 #define TPACPI_ACPIHANDLE_INIT(object) \
673         drv_acpi_handle_init(#object, &object##_handle, *object##_parent, \
674                 object##_paths, ARRAY_SIZE(object##_paths))
675
676 static void __init drv_acpi_handle_init(const char *name,
677                            acpi_handle *handle, const acpi_handle parent,
678                            char **paths, const int num_paths)
679 {
680         int i;
681         acpi_status status;
682
683         vdbg_printk(TPACPI_DBG_INIT, "trying to locate ACPI handle for %s\n",
684                 name);
685
686         for (i = 0; i < num_paths; i++) {
687                 status = acpi_get_handle(parent, paths[i], handle);
688                 if (ACPI_SUCCESS(status)) {
689                         dbg_printk(TPACPI_DBG_INIT,
690                                    "Found ACPI handle %s for %s\n",
691                                    paths[i], name);
692                         return;
693                 }
694         }
695
696         vdbg_printk(TPACPI_DBG_INIT, "ACPI handle for %s not found\n",
697                     name);
698         *handle = NULL;
699 }
700
701 static acpi_status __init tpacpi_acpi_handle_locate_callback(acpi_handle handle,
702                         u32 level, void *context, void **return_value)
703 {
704         *(acpi_handle *)return_value = handle;
705
706         return AE_CTRL_TERMINATE;
707 }
708
709 static void __init tpacpi_acpi_handle_locate(const char *name,
710                 const char *hid,
711                 acpi_handle *handle)
712 {
713         acpi_status status;
714         acpi_handle device_found;
715
716         BUG_ON(!name || !hid || !handle);
717         vdbg_printk(TPACPI_DBG_INIT,
718                         "trying to locate ACPI handle for %s, using HID %s\n",
719                         name, hid);
720
721         memset(&device_found, 0, sizeof(device_found));
722         status = acpi_get_devices(hid, tpacpi_acpi_handle_locate_callback,
723                                   (void *)name, &device_found);
724
725         *handle = NULL;
726
727         if (ACPI_SUCCESS(status)) {
728                 *handle = device_found;
729                 dbg_printk(TPACPI_DBG_INIT,
730                            "Found ACPI handle for %s\n", name);
731         } else {
732                 vdbg_printk(TPACPI_DBG_INIT,
733                             "Could not locate an ACPI handle for %s: %s\n",
734                             name, acpi_format_exception(status));
735         }
736 }
737
738 static void dispatch_acpi_notify(acpi_handle handle, u32 event, void *data)
739 {
740         struct ibm_struct *ibm = data;
741
742         if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
743                 return;
744
745         if (!ibm || !ibm->acpi || !ibm->acpi->notify)
746                 return;
747
748         ibm->acpi->notify(ibm, event);
749 }
750
751 static int __init setup_acpi_notify(struct ibm_struct *ibm)
752 {
753         acpi_status status;
754         int rc;
755
756         BUG_ON(!ibm->acpi);
757
758         if (!*ibm->acpi->handle)
759                 return 0;
760
761         vdbg_printk(TPACPI_DBG_INIT,
762                 "setting up ACPI notify for %s\n", ibm->name);
763
764         rc = acpi_bus_get_device(*ibm->acpi->handle, &ibm->acpi->device);
765         if (rc < 0) {
766                 pr_err("acpi_bus_get_device(%s) failed: %d\n", ibm->name, rc);
767                 return -ENODEV;
768         }
769
770         ibm->acpi->device->driver_data = ibm;
771         sprintf(acpi_device_class(ibm->acpi->device), "%s/%s",
772                 TPACPI_ACPI_EVENT_PREFIX,
773                 ibm->name);
774
775         status = acpi_install_notify_handler(*ibm->acpi->handle,
776                         ibm->acpi->type, dispatch_acpi_notify, ibm);
777         if (ACPI_FAILURE(status)) {
778                 if (status == AE_ALREADY_EXISTS) {
779                         pr_notice("another device driver is already "
780                                   "handling %s events\n", ibm->name);
781                 } else {
782                         pr_err("acpi_install_notify_handler(%s) failed: %s\n",
783                                ibm->name, acpi_format_exception(status));
784                 }
785                 return -ENODEV;
786         }
787         ibm->flags.acpi_notify_installed = 1;
788         return 0;
789 }
790
791 static int __init tpacpi_device_add(struct acpi_device *device)
792 {
793         return 0;
794 }
795
796 static int __init register_tpacpi_subdriver(struct ibm_struct *ibm)
797 {
798         int rc;
799
800         dbg_printk(TPACPI_DBG_INIT,
801                 "registering %s as an ACPI driver\n", ibm->name);
802
803         BUG_ON(!ibm->acpi);
804
805         ibm->acpi->driver = kzalloc(sizeof(struct acpi_driver), GFP_KERNEL);
806         if (!ibm->acpi->driver) {
807                 pr_err("failed to allocate memory for ibm->acpi->driver\n");
808                 return -ENOMEM;
809         }
810
811         sprintf(ibm->acpi->driver->name, "%s_%s", TPACPI_NAME, ibm->name);
812         ibm->acpi->driver->ids = ibm->acpi->hid;
813
814         ibm->acpi->driver->ops.add = &tpacpi_device_add;
815
816         rc = acpi_bus_register_driver(ibm->acpi->driver);
817         if (rc < 0) {
818                 pr_err("acpi_bus_register_driver(%s) failed: %d\n",
819                        ibm->name, rc);
820                 kfree(ibm->acpi->driver);
821                 ibm->acpi->driver = NULL;
822         } else if (!rc)
823                 ibm->flags.acpi_driver_registered = 1;
824
825         return rc;
826 }
827
828
829 /****************************************************************************
830  ****************************************************************************
831  *
832  * Procfs Helpers
833  *
834  ****************************************************************************
835  ****************************************************************************/
836
837 static int dispatch_proc_show(struct seq_file *m, void *v)
838 {
839         struct ibm_struct *ibm = m->private;
840
841         if (!ibm || !ibm->read)
842                 return -EINVAL;
843         return ibm->read(m);
844 }
845
846 static int dispatch_proc_open(struct inode *inode, struct file *file)
847 {
848         return single_open(file, dispatch_proc_show, PDE(inode)->data);
849 }
850
851 static ssize_t dispatch_proc_write(struct file *file,
852                         const char __user *userbuf,
853                         size_t count, loff_t *pos)
854 {
855         struct ibm_struct *ibm = PDE(file->f_path.dentry->d_inode)->data;
856         char *kernbuf;
857         int ret;
858
859         if (!ibm || !ibm->write)
860                 return -EINVAL;
861         if (count > PAGE_SIZE - 2)
862                 return -EINVAL;
863
864         kernbuf = kmalloc(count + 2, GFP_KERNEL);
865         if (!kernbuf)
866                 return -ENOMEM;
867
868         if (copy_from_user(kernbuf, userbuf, count)) {
869                 kfree(kernbuf);
870                 return -EFAULT;
871         }
872
873         kernbuf[count] = 0;
874         strcat(kernbuf, ",");
875         ret = ibm->write(kernbuf);
876         if (ret == 0)
877                 ret = count;
878
879         kfree(kernbuf);
880
881         return ret;
882 }
883
884 static const struct file_operations dispatch_proc_fops = {
885         .owner          = THIS_MODULE,
886         .open           = dispatch_proc_open,
887         .read           = seq_read,
888         .llseek         = seq_lseek,
889         .release        = single_release,
890         .write          = dispatch_proc_write,
891 };
892
893 static char *next_cmd(char **cmds)
894 {
895         char *start = *cmds;
896         char *end;
897
898         while ((end = strchr(start, ',')) && end == start)
899                 start = end + 1;
900
901         if (!end)
902                 return NULL;
903
904         *end = 0;
905         *cmds = end + 1;
906         return start;
907 }
908
909
910 /****************************************************************************
911  ****************************************************************************
912  *
913  * Device model: input, hwmon and platform
914  *
915  ****************************************************************************
916  ****************************************************************************/
917
918 static struct platform_device *tpacpi_pdev;
919 static struct platform_device *tpacpi_sensors_pdev;
920 static struct device *tpacpi_hwmon;
921 static struct input_dev *tpacpi_inputdev;
922 static struct mutex tpacpi_inputdev_send_mutex;
923 static LIST_HEAD(tpacpi_all_drivers);
924
925 static int tpacpi_suspend_handler(struct platform_device *pdev,
926                                   pm_message_t state)
927 {
928         struct ibm_struct *ibm, *itmp;
929
930         list_for_each_entry_safe(ibm, itmp,
931                                  &tpacpi_all_drivers,
932                                  all_drivers) {
933                 if (ibm->suspend)
934                         (ibm->suspend)(state);
935         }
936
937         return 0;
938 }
939
940 static int tpacpi_resume_handler(struct platform_device *pdev)
941 {
942         struct ibm_struct *ibm, *itmp;
943
944         list_for_each_entry_safe(ibm, itmp,
945                                  &tpacpi_all_drivers,
946                                  all_drivers) {
947                 if (ibm->resume)
948                         (ibm->resume)();
949         }
950
951         return 0;
952 }
953
954 static void tpacpi_shutdown_handler(struct platform_device *pdev)
955 {
956         struct ibm_struct *ibm, *itmp;
957
958         list_for_each_entry_safe(ibm, itmp,
959                                  &tpacpi_all_drivers,
960                                  all_drivers) {
961                 if (ibm->shutdown)
962                         (ibm->shutdown)();
963         }
964 }
965
966 static struct platform_driver tpacpi_pdriver = {
967         .driver = {
968                 .name = TPACPI_DRVR_NAME,
969                 .owner = THIS_MODULE,
970         },
971         .suspend = tpacpi_suspend_handler,
972         .resume = tpacpi_resume_handler,
973         .shutdown = tpacpi_shutdown_handler,
974 };
975
976 static struct platform_driver tpacpi_hwmon_pdriver = {
977         .driver = {
978                 .name = TPACPI_HWMON_DRVR_NAME,
979                 .owner = THIS_MODULE,
980         },
981 };
982
983 /*************************************************************************
984  * sysfs support helpers
985  */
986
987 struct attribute_set {
988         unsigned int members, max_members;
989         struct attribute_group group;
990 };
991
992 struct attribute_set_obj {
993         struct attribute_set s;
994         struct attribute *a;
995 } __attribute__((packed));
996
997 static struct attribute_set *create_attr_set(unsigned int max_members,
998                                                 const char *name)
999 {
1000         struct attribute_set_obj *sobj;
1001
1002         if (max_members == 0)
1003                 return NULL;
1004
1005         /* Allocates space for implicit NULL at the end too */
1006         sobj = kzalloc(sizeof(struct attribute_set_obj) +
1007                     max_members * sizeof(struct attribute *),
1008                     GFP_KERNEL);
1009         if (!sobj)
1010                 return NULL;
1011         sobj->s.max_members = max_members;
1012         sobj->s.group.attrs = &sobj->a;
1013         sobj->s.group.name = name;
1014
1015         return &sobj->s;
1016 }
1017
1018 #define destroy_attr_set(_set) \
1019         kfree(_set);
1020
1021 /* not multi-threaded safe, use it in a single thread per set */
1022 static int add_to_attr_set(struct attribute_set *s, struct attribute *attr)
1023 {
1024         if (!s || !attr)
1025                 return -EINVAL;
1026
1027         if (s->members >= s->max_members)
1028                 return -ENOMEM;
1029
1030         s->group.attrs[s->members] = attr;
1031         s->members++;
1032
1033         return 0;
1034 }
1035
1036 static int add_many_to_attr_set(struct attribute_set *s,
1037                         struct attribute **attr,
1038                         unsigned int count)
1039 {
1040         int i, res;
1041
1042         for (i = 0; i < count; i++) {
1043                 res = add_to_attr_set(s, attr[i]);
1044                 if (res)
1045                         return res;
1046         }
1047
1048         return 0;
1049 }
1050
1051 static void delete_attr_set(struct attribute_set *s, struct kobject *kobj)
1052 {
1053         sysfs_remove_group(kobj, &s->group);
1054         destroy_attr_set(s);
1055 }
1056
1057 #define register_attr_set_with_sysfs(_attr_set, _kobj) \
1058         sysfs_create_group(_kobj, &_attr_set->group)
1059
1060 static int parse_strtoul(const char *buf,
1061                 unsigned long max, unsigned long *value)
1062 {
1063         char *endp;
1064
1065         *value = simple_strtoul(skip_spaces(buf), &endp, 0);
1066         endp = skip_spaces(endp);
1067         if (*endp || *value > max)
1068                 return -EINVAL;
1069
1070         return 0;
1071 }
1072
1073 static void tpacpi_disable_brightness_delay(void)
1074 {
1075         if (acpi_evalf(hkey_handle, NULL, "PWMS", "qvd", 0))
1076                 pr_notice("ACPI backlight control delay disabled\n");
1077 }
1078
1079 static void printk_deprecated_attribute(const char * const what,
1080                                         const char * const details)
1081 {
1082         tpacpi_log_usertask("deprecated sysfs attribute");
1083         pr_warn("WARNING: sysfs attribute %s is deprecated and "
1084                 "will be removed. %s\n",
1085                 what, details);
1086 }
1087
1088 /*************************************************************************
1089  * rfkill and radio control support helpers
1090  */
1091
1092 /*
1093  * ThinkPad-ACPI firmware handling model:
1094  *
1095  * WLSW (master wireless switch) is event-driven, and is common to all
1096  * firmware-controlled radios.  It cannot be controlled, just monitored,
1097  * as expected.  It overrides all radio state in firmware
1098  *
1099  * The kernel, a masked-off hotkey, and WLSW can change the radio state
1100  * (TODO: verify how WLSW interacts with the returned radio state).
1101  *
1102  * The only time there are shadow radio state changes, is when
1103  * masked-off hotkeys are used.
1104  */
1105
1106 /*
1107  * Internal driver API for radio state:
1108  *
1109  * int: < 0 = error, otherwise enum tpacpi_rfkill_state
1110  * bool: true means radio blocked (off)
1111  */
1112 enum tpacpi_rfkill_state {
1113         TPACPI_RFK_RADIO_OFF = 0,
1114         TPACPI_RFK_RADIO_ON
1115 };
1116
1117 /* rfkill switches */
1118 enum tpacpi_rfk_id {
1119         TPACPI_RFK_BLUETOOTH_SW_ID = 0,
1120         TPACPI_RFK_WWAN_SW_ID,
1121         TPACPI_RFK_UWB_SW_ID,
1122         TPACPI_RFK_SW_MAX
1123 };
1124
1125 static const char *tpacpi_rfkill_names[] = {
1126         [TPACPI_RFK_BLUETOOTH_SW_ID] = "bluetooth",
1127         [TPACPI_RFK_WWAN_SW_ID] = "wwan",
1128         [TPACPI_RFK_UWB_SW_ID] = "uwb",
1129         [TPACPI_RFK_SW_MAX] = NULL
1130 };
1131
1132 /* ThinkPad-ACPI rfkill subdriver */
1133 struct tpacpi_rfk {
1134         struct rfkill *rfkill;
1135         enum tpacpi_rfk_id id;
1136         const struct tpacpi_rfk_ops *ops;
1137 };
1138
1139 struct tpacpi_rfk_ops {
1140         /* firmware interface */
1141         int (*get_status)(void);
1142         int (*set_status)(const enum tpacpi_rfkill_state);
1143 };
1144
1145 static struct tpacpi_rfk *tpacpi_rfkill_switches[TPACPI_RFK_SW_MAX];
1146
1147 /* Query FW and update rfkill sw state for a given rfkill switch */
1148 static int tpacpi_rfk_update_swstate(const struct tpacpi_rfk *tp_rfk)
1149 {
1150         int status;
1151
1152         if (!tp_rfk)
1153                 return -ENODEV;
1154
1155         status = (tp_rfk->ops->get_status)();
1156         if (status < 0)
1157                 return status;
1158
1159         rfkill_set_sw_state(tp_rfk->rfkill,
1160                             (status == TPACPI_RFK_RADIO_OFF));
1161
1162         return status;
1163 }
1164
1165 /* Query FW and update rfkill sw state for all rfkill switches */
1166 static void tpacpi_rfk_update_swstate_all(void)
1167 {
1168         unsigned int i;
1169
1170         for (i = 0; i < TPACPI_RFK_SW_MAX; i++)
1171                 tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[i]);
1172 }
1173
1174 /*
1175  * Sync the HW-blocking state of all rfkill switches,
1176  * do notice it causes the rfkill core to schedule uevents
1177  */
1178 static void tpacpi_rfk_update_hwblock_state(bool blocked)
1179 {
1180         unsigned int i;
1181         struct tpacpi_rfk *tp_rfk;
1182
1183         for (i = 0; i < TPACPI_RFK_SW_MAX; i++) {
1184                 tp_rfk = tpacpi_rfkill_switches[i];
1185                 if (tp_rfk) {
1186                         if (rfkill_set_hw_state(tp_rfk->rfkill,
1187                                                 blocked)) {
1188                                 /* ignore -- we track sw block */
1189                         }
1190                 }
1191         }
1192 }
1193
1194 /* Call to get the WLSW state from the firmware */
1195 static int hotkey_get_wlsw(void);
1196
1197 /* Call to query WLSW state and update all rfkill switches */
1198 static bool tpacpi_rfk_check_hwblock_state(void)
1199 {
1200         int res = hotkey_get_wlsw();
1201         int hw_blocked;
1202
1203         /* When unknown or unsupported, we have to assume it is unblocked */
1204         if (res < 0)
1205                 return false;
1206
1207         hw_blocked = (res == TPACPI_RFK_RADIO_OFF);
1208         tpacpi_rfk_update_hwblock_state(hw_blocked);
1209
1210         return hw_blocked;
1211 }
1212
1213 static int tpacpi_rfk_hook_set_block(void *data, bool blocked)
1214 {
1215         struct tpacpi_rfk *tp_rfk = data;
1216         int res;
1217
1218         dbg_printk(TPACPI_DBG_RFKILL,
1219                    "request to change radio state to %s\n",
1220                    blocked ? "blocked" : "unblocked");
1221
1222         /* try to set radio state */
1223         res = (tp_rfk->ops->set_status)(blocked ?
1224                                 TPACPI_RFK_RADIO_OFF : TPACPI_RFK_RADIO_ON);
1225
1226         /* and update the rfkill core with whatever the FW really did */
1227         tpacpi_rfk_update_swstate(tp_rfk);
1228
1229         return (res < 0) ? res : 0;
1230 }
1231
1232 static const struct rfkill_ops tpacpi_rfk_rfkill_ops = {
1233         .set_block = tpacpi_rfk_hook_set_block,
1234 };
1235
1236 static int __init tpacpi_new_rfkill(const enum tpacpi_rfk_id id,
1237                         const struct tpacpi_rfk_ops *tp_rfkops,
1238                         const enum rfkill_type rfktype,
1239                         const char *name,
1240                         const bool set_default)
1241 {
1242         struct tpacpi_rfk *atp_rfk;
1243         int res;
1244         bool sw_state = false;
1245         bool hw_state;
1246         int sw_status;
1247
1248         BUG_ON(id >= TPACPI_RFK_SW_MAX || tpacpi_rfkill_switches[id]);
1249
1250         atp_rfk = kzalloc(sizeof(struct tpacpi_rfk), GFP_KERNEL);
1251         if (atp_rfk)
1252                 atp_rfk->rfkill = rfkill_alloc(name,
1253                                                 &tpacpi_pdev->dev,
1254                                                 rfktype,
1255                                                 &tpacpi_rfk_rfkill_ops,
1256                                                 atp_rfk);
1257         if (!atp_rfk || !atp_rfk->rfkill) {
1258                 pr_err("failed to allocate memory for rfkill class\n");
1259                 kfree(atp_rfk);
1260                 return -ENOMEM;
1261         }
1262
1263         atp_rfk->id = id;
1264         atp_rfk->ops = tp_rfkops;
1265
1266         sw_status = (tp_rfkops->get_status)();
1267         if (sw_status < 0) {
1268                 pr_err("failed to read initial state for %s, error %d\n",
1269                        name, sw_status);
1270         } else {
1271                 sw_state = (sw_status == TPACPI_RFK_RADIO_OFF);
1272                 if (set_default) {
1273                         /* try to keep the initial state, since we ask the
1274                          * firmware to preserve it across S5 in NVRAM */
1275                         rfkill_init_sw_state(atp_rfk->rfkill, sw_state);
1276                 }
1277         }
1278         hw_state = tpacpi_rfk_check_hwblock_state();
1279         rfkill_set_hw_state(atp_rfk->rfkill, hw_state);
1280
1281         res = rfkill_register(atp_rfk->rfkill);
1282         if (res < 0) {
1283                 pr_err("failed to register %s rfkill switch: %d\n", name, res);
1284                 rfkill_destroy(atp_rfk->rfkill);
1285                 kfree(atp_rfk);
1286                 return res;
1287         }
1288
1289         tpacpi_rfkill_switches[id] = atp_rfk;
1290
1291         pr_info("rfkill switch %s: radio is %sblocked\n",
1292                 name, (sw_state || hw_state) ? "" : "un");
1293         return 0;
1294 }
1295
1296 static void tpacpi_destroy_rfkill(const enum tpacpi_rfk_id id)
1297 {
1298         struct tpacpi_rfk *tp_rfk;
1299
1300         BUG_ON(id >= TPACPI_RFK_SW_MAX);
1301
1302         tp_rfk = tpacpi_rfkill_switches[id];
1303         if (tp_rfk) {
1304                 rfkill_unregister(tp_rfk->rfkill);
1305                 rfkill_destroy(tp_rfk->rfkill);
1306                 tpacpi_rfkill_switches[id] = NULL;
1307                 kfree(tp_rfk);
1308         }
1309 }
1310
1311 static void printk_deprecated_rfkill_attribute(const char * const what)
1312 {
1313         printk_deprecated_attribute(what,
1314                         "Please switch to generic rfkill before year 2010");
1315 }
1316
1317 /* sysfs <radio> enable ------------------------------------------------ */
1318 static ssize_t tpacpi_rfk_sysfs_enable_show(const enum tpacpi_rfk_id id,
1319                                             struct device_attribute *attr,
1320                                             char *buf)
1321 {
1322         int status;
1323
1324         printk_deprecated_rfkill_attribute(attr->attr.name);
1325
1326         /* This is in the ABI... */
1327         if (tpacpi_rfk_check_hwblock_state()) {
1328                 status = TPACPI_RFK_RADIO_OFF;
1329         } else {
1330                 status = tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]);
1331                 if (status < 0)
1332                         return status;
1333         }
1334
1335         return snprintf(buf, PAGE_SIZE, "%d\n",
1336                         (status == TPACPI_RFK_RADIO_ON) ? 1 : 0);
1337 }
1338
1339 static ssize_t tpacpi_rfk_sysfs_enable_store(const enum tpacpi_rfk_id id,
1340                             struct device_attribute *attr,
1341                             const char *buf, size_t count)
1342 {
1343         unsigned long t;
1344         int res;
1345
1346         printk_deprecated_rfkill_attribute(attr->attr.name);
1347
1348         if (parse_strtoul(buf, 1, &t))
1349                 return -EINVAL;
1350
1351         tpacpi_disclose_usertask(attr->attr.name, "set to %ld\n", t);
1352
1353         /* This is in the ABI... */
1354         if (tpacpi_rfk_check_hwblock_state() && !!t)
1355                 return -EPERM;
1356
1357         res = tpacpi_rfkill_switches[id]->ops->set_status((!!t) ?
1358                                 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF);
1359         tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]);
1360
1361         return (res < 0) ? res : count;
1362 }
1363
1364 /* procfs -------------------------------------------------------------- */
1365 static int tpacpi_rfk_procfs_read(const enum tpacpi_rfk_id id, struct seq_file *m)
1366 {
1367         if (id >= TPACPI_RFK_SW_MAX)
1368                 seq_printf(m, "status:\t\tnot supported\n");
1369         else {
1370                 int status;
1371
1372                 /* This is in the ABI... */
1373                 if (tpacpi_rfk_check_hwblock_state()) {
1374                         status = TPACPI_RFK_RADIO_OFF;
1375                 } else {
1376                         status = tpacpi_rfk_update_swstate(
1377                                                 tpacpi_rfkill_switches[id]);
1378                         if (status < 0)
1379                                 return status;
1380                 }
1381
1382                 seq_printf(m, "status:\t\t%s\n",
1383                                 (status == TPACPI_RFK_RADIO_ON) ?
1384                                         "enabled" : "disabled");
1385                 seq_printf(m, "commands:\tenable, disable\n");
1386         }
1387
1388         return 0;
1389 }
1390
1391 static int tpacpi_rfk_procfs_write(const enum tpacpi_rfk_id id, char *buf)
1392 {
1393         char *cmd;
1394         int status = -1;
1395         int res = 0;
1396
1397         if (id >= TPACPI_RFK_SW_MAX)
1398                 return -ENODEV;
1399
1400         while ((cmd = next_cmd(&buf))) {
1401                 if (strlencmp(cmd, "enable") == 0)
1402                         status = TPACPI_RFK_RADIO_ON;
1403                 else if (strlencmp(cmd, "disable") == 0)
1404                         status = TPACPI_RFK_RADIO_OFF;
1405                 else
1406                         return -EINVAL;
1407         }
1408
1409         if (status != -1) {
1410                 tpacpi_disclose_usertask("procfs", "attempt to %s %s\n",
1411                                 (status == TPACPI_RFK_RADIO_ON) ?
1412                                                 "enable" : "disable",
1413                                 tpacpi_rfkill_names[id]);
1414                 res = (tpacpi_rfkill_switches[id]->ops->set_status)(status);
1415                 tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]);
1416         }
1417
1418         return res;
1419 }
1420
1421 /*************************************************************************
1422  * thinkpad-acpi driver attributes
1423  */
1424
1425 /* interface_version --------------------------------------------------- */
1426 static ssize_t tpacpi_driver_interface_version_show(
1427                                 struct device_driver *drv,
1428                                 char *buf)
1429 {
1430         return snprintf(buf, PAGE_SIZE, "0x%08x\n", TPACPI_SYSFS_VERSION);
1431 }
1432
1433 static DRIVER_ATTR(interface_version, S_IRUGO,
1434                 tpacpi_driver_interface_version_show, NULL);
1435
1436 /* debug_level --------------------------------------------------------- */
1437 static ssize_t tpacpi_driver_debug_show(struct device_driver *drv,
1438                                                 char *buf)
1439 {
1440         return snprintf(buf, PAGE_SIZE, "0x%04x\n", dbg_level);
1441 }
1442
1443 static ssize_t tpacpi_driver_debug_store(struct device_driver *drv,
1444                                                 const char *buf, size_t count)
1445 {
1446         unsigned long t;
1447
1448         if (parse_strtoul(buf, 0xffff, &t))
1449                 return -EINVAL;
1450
1451         dbg_level = t;
1452
1453         return count;
1454 }
1455
1456 static DRIVER_ATTR(debug_level, S_IWUSR | S_IRUGO,
1457                 tpacpi_driver_debug_show, tpacpi_driver_debug_store);
1458
1459 /* version ------------------------------------------------------------- */
1460 static ssize_t tpacpi_driver_version_show(struct device_driver *drv,
1461                                                 char *buf)
1462 {
1463         return snprintf(buf, PAGE_SIZE, "%s v%s\n",
1464                         TPACPI_DESC, TPACPI_VERSION);
1465 }
1466
1467 static DRIVER_ATTR(version, S_IRUGO,
1468                 tpacpi_driver_version_show, NULL);
1469
1470 /* --------------------------------------------------------------------- */
1471
1472 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
1473
1474 /* wlsw_emulstate ------------------------------------------------------ */
1475 static ssize_t tpacpi_driver_wlsw_emulstate_show(struct device_driver *drv,
1476                                                 char *buf)
1477 {
1478         return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_wlsw_emulstate);
1479 }
1480
1481 static ssize_t tpacpi_driver_wlsw_emulstate_store(struct device_driver *drv,
1482                                                 const char *buf, size_t count)
1483 {
1484         unsigned long t;
1485
1486         if (parse_strtoul(buf, 1, &t))
1487                 return -EINVAL;
1488
1489         if (tpacpi_wlsw_emulstate != !!t) {
1490                 tpacpi_wlsw_emulstate = !!t;
1491                 tpacpi_rfk_update_hwblock_state(!t);    /* negative logic */
1492         }
1493
1494         return count;
1495 }
1496
1497 static DRIVER_ATTR(wlsw_emulstate, S_IWUSR | S_IRUGO,
1498                 tpacpi_driver_wlsw_emulstate_show,
1499                 tpacpi_driver_wlsw_emulstate_store);
1500
1501 /* bluetooth_emulstate ------------------------------------------------- */
1502 static ssize_t tpacpi_driver_bluetooth_emulstate_show(
1503                                         struct device_driver *drv,
1504                                         char *buf)
1505 {
1506         return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_bluetooth_emulstate);
1507 }
1508
1509 static ssize_t tpacpi_driver_bluetooth_emulstate_store(
1510                                         struct device_driver *drv,
1511                                         const char *buf, size_t count)
1512 {
1513         unsigned long t;
1514
1515         if (parse_strtoul(buf, 1, &t))
1516                 return -EINVAL;
1517
1518         tpacpi_bluetooth_emulstate = !!t;
1519
1520         return count;
1521 }
1522
1523 static DRIVER_ATTR(bluetooth_emulstate, S_IWUSR | S_IRUGO,
1524                 tpacpi_driver_bluetooth_emulstate_show,
1525                 tpacpi_driver_bluetooth_emulstate_store);
1526
1527 /* wwan_emulstate ------------------------------------------------- */
1528 static ssize_t tpacpi_driver_wwan_emulstate_show(
1529                                         struct device_driver *drv,
1530                                         char *buf)
1531 {
1532         return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_wwan_emulstate);
1533 }
1534
1535 static ssize_t tpacpi_driver_wwan_emulstate_store(
1536                                         struct device_driver *drv,
1537                                         const char *buf, size_t count)
1538 {
1539         unsigned long t;
1540
1541         if (parse_strtoul(buf, 1, &t))
1542                 return -EINVAL;
1543
1544         tpacpi_wwan_emulstate = !!t;
1545
1546         return count;
1547 }
1548
1549 static DRIVER_ATTR(wwan_emulstate, S_IWUSR | S_IRUGO,
1550                 tpacpi_driver_wwan_emulstate_show,
1551                 tpacpi_driver_wwan_emulstate_store);
1552
1553 /* uwb_emulstate ------------------------------------------------- */
1554 static ssize_t tpacpi_driver_uwb_emulstate_show(
1555                                         struct device_driver *drv,
1556                                         char *buf)
1557 {
1558         return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_uwb_emulstate);
1559 }
1560
1561 static ssize_t tpacpi_driver_uwb_emulstate_store(
1562                                         struct device_driver *drv,
1563                                         const char *buf, size_t count)
1564 {
1565         unsigned long t;
1566
1567         if (parse_strtoul(buf, 1, &t))
1568                 return -EINVAL;
1569
1570         tpacpi_uwb_emulstate = !!t;
1571
1572         return count;
1573 }
1574
1575 static DRIVER_ATTR(uwb_emulstate, S_IWUSR | S_IRUGO,
1576                 tpacpi_driver_uwb_emulstate_show,
1577                 tpacpi_driver_uwb_emulstate_store);
1578 #endif
1579
1580 /* --------------------------------------------------------------------- */
1581
1582 static struct driver_attribute *tpacpi_driver_attributes[] = {
1583         &driver_attr_debug_level, &driver_attr_version,
1584         &driver_attr_interface_version,
1585 };
1586
1587 static int __init tpacpi_create_driver_attributes(struct device_driver *drv)
1588 {
1589         int i, res;
1590
1591         i = 0;
1592         res = 0;
1593         while (!res && i < ARRAY_SIZE(tpacpi_driver_attributes)) {
1594                 res = driver_create_file(drv, tpacpi_driver_attributes[i]);
1595                 i++;
1596         }
1597
1598 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
1599         if (!res && dbg_wlswemul)
1600                 res = driver_create_file(drv, &driver_attr_wlsw_emulstate);
1601         if (!res && dbg_bluetoothemul)
1602                 res = driver_create_file(drv, &driver_attr_bluetooth_emulstate);
1603         if (!res && dbg_wwanemul)
1604                 res = driver_create_file(drv, &driver_attr_wwan_emulstate);
1605         if (!res && dbg_uwbemul)
1606                 res = driver_create_file(drv, &driver_attr_uwb_emulstate);
1607 #endif
1608
1609         return res;
1610 }
1611
1612 static void tpacpi_remove_driver_attributes(struct device_driver *drv)
1613 {
1614         int i;
1615
1616         for (i = 0; i < ARRAY_SIZE(tpacpi_driver_attributes); i++)
1617                 driver_remove_file(drv, tpacpi_driver_attributes[i]);
1618
1619 #ifdef THINKPAD_ACPI_DEBUGFACILITIES
1620         driver_remove_file(drv, &driver_attr_wlsw_emulstate);
1621         driver_remove_file(drv, &driver_attr_bluetooth_emulstate);
1622         driver_remove_file(drv, &driver_attr_wwan_emulstate);
1623         driver_remove_file(drv, &driver_attr_uwb_emulstate);
1624 #endif
1625 }
1626
1627 /*************************************************************************
1628  * Firmware Data
1629  */
1630
1631 /*
1632  * Table of recommended minimum BIOS versions
1633  *
1634  * Reasons for listing:
1635  *    1. Stable BIOS, listed because the unknown amount of
1636  *       bugs and bad ACPI behaviour on older versions
1637  *
1638  *    2. BIOS or EC fw with known bugs that trigger on Linux
1639  *
1640  *    3. BIOS with known reduced functionality in older versions
1641  *
1642  *  We recommend the latest BIOS and EC version.
1643  *  We only support the latest BIOS and EC fw version as a rule.
1644  *
1645  *  Sources: IBM ThinkPad Public Web Documents (update changelogs),
1646  *  Information from users in ThinkWiki
1647  *
1648  *  WARNING: we use this table also to detect that the machine is
1649  *  a ThinkPad in some cases, so don't remove entries lightly.
1650  */
1651
1652 #define TPV_Q(__v, __id1, __id2, __bv1, __bv2)          \
1653         { .vendor       = (__v),                        \
1654           .bios         = TPID(__id1, __id2),           \
1655           .ec           = TPACPI_MATCH_ANY,             \
1656           .quirks       = TPACPI_MATCH_ANY << 16        \
1657                           | (__bv1) << 8 | (__bv2) }
1658
1659 #define TPV_Q_X(__v, __bid1, __bid2, __bv1, __bv2,      \
1660                 __eid, __ev1, __ev2)                    \
1661         { .vendor       = (__v),                        \
1662           .bios         = TPID(__bid1, __bid2),         \
1663           .ec           = __eid,                        \
1664           .quirks       = (__ev1) << 24 | (__ev2) << 16 \
1665                           | (__bv1) << 8 | (__bv2) }
1666
1667 #define TPV_QI0(__id1, __id2, __bv1, __bv2) \
1668         TPV_Q(PCI_VENDOR_ID_IBM, __id1, __id2, __bv1, __bv2)
1669
1670 /* Outdated IBM BIOSes often lack the EC id string */
1671 #define TPV_QI1(__id1, __id2, __bv1, __bv2, __ev1, __ev2) \
1672         TPV_Q_X(PCI_VENDOR_ID_IBM, __id1, __id2,        \
1673                 __bv1, __bv2, TPID(__id1, __id2),       \
1674                 __ev1, __ev2),                          \
1675         TPV_Q_X(PCI_VENDOR_ID_IBM, __id1, __id2,        \
1676                 __bv1, __bv2, TPACPI_MATCH_UNKNOWN,     \
1677                 __ev1, __ev2)
1678
1679 /* Outdated IBM BIOSes often lack the EC id string */
1680 #define TPV_QI2(__bid1, __bid2, __bv1, __bv2,           \
1681                 __eid1, __eid2, __ev1, __ev2)           \
1682         TPV_Q_X(PCI_VENDOR_ID_IBM, __bid1, __bid2,      \
1683                 __bv1, __bv2, TPID(__eid1, __eid2),     \
1684                 __ev1, __ev2),                          \
1685         TPV_Q_X(PCI_VENDOR_ID_IBM, __bid1, __bid2,      \
1686                 __bv1, __bv2, TPACPI_MATCH_UNKNOWN,     \
1687                 __ev1, __ev2)
1688
1689 #define TPV_QL0(__id1, __id2, __bv1, __bv2) \
1690         TPV_Q(PCI_VENDOR_ID_LENOVO, __id1, __id2, __bv1, __bv2)
1691
1692 #define TPV_QL1(__id1, __id2, __bv1, __bv2, __ev1, __ev2) \
1693         TPV_Q_X(PCI_VENDOR_ID_LENOVO, __id1, __id2,     \
1694                 __bv1, __bv2, TPID(__id1, __id2),       \
1695                 __ev1, __ev2)
1696
1697 #define TPV_QL2(__bid1, __bid2, __bv1, __bv2,           \
1698                 __eid1, __eid2, __ev1, __ev2)           \
1699         TPV_Q_X(PCI_VENDOR_ID_LENOVO, __bid1, __bid2,   \
1700                 __bv1, __bv2, TPID(__eid1, __eid2),     \
1701                 __ev1, __ev2)
1702
1703 static const struct tpacpi_quirk tpacpi_bios_version_qtable[] __initconst = {
1704         /*  Numeric models ------------------ */
1705         /*      FW MODEL   BIOS VERS          */
1706         TPV_QI0('I', 'M',  '6', '5'),            /* 570 */
1707         TPV_QI0('I', 'U',  '2', '6'),            /* 570E */
1708         TPV_QI0('I', 'B',  '5', '4'),            /* 600 */
1709         TPV_QI0('I', 'H',  '4', '7'),            /* 600E */
1710         TPV_QI0('I', 'N',  '3', '6'),            /* 600E */
1711         TPV_QI0('I', 'T',  '5', '5'),            /* 600X */
1712         TPV_QI0('I', 'D',  '4', '8'),            /* 770, 770E, 770ED */
1713         TPV_QI0('I', 'I',  '4', '2'),            /* 770X */
1714         TPV_QI0('I', 'O',  '2', '3'),            /* 770Z */
1715
1716         /* A-series ------------------------- */
1717         /*      FW MODEL   BIOS VERS  EC VERS */
1718         TPV_QI0('I', 'W',  '5', '9'),            /* A20m */
1719         TPV_QI0('I', 'V',  '6', '9'),            /* A20p */
1720         TPV_QI0('1', '0',  '2', '6'),            /* A21e, A22e */
1721         TPV_QI0('K', 'U',  '3', '6'),            /* A21e */
1722         TPV_QI0('K', 'X',  '3', '6'),            /* A21m, A22m */
1723         TPV_QI0('K', 'Y',  '3', '8'),            /* A21p, A22p */
1724         TPV_QI0('1', 'B',  '1', '7'),            /* A22e */
1725         TPV_QI0('1', '3',  '2', '0'),            /* A22m */
1726         TPV_QI0('1', 'E',  '7', '3'),            /* A30/p (0) */
1727         TPV_QI1('1', 'G',  '4', '1',  '1', '7'), /* A31/p (0) */
1728         TPV_QI1('1', 'N',  '1', '6',  '0', '7'), /* A31/p (0) */
1729
1730         /* G-series ------------------------- */
1731         /*      FW MODEL   BIOS VERS          */
1732         TPV_QI0('1', 'T',  'A', '6'),            /* G40 */
1733         TPV_QI0('1', 'X',  '5', '7'),            /* G41 */
1734
1735         /* R-series, T-series --------------- */
1736         /*      FW MODEL   BIOS VERS  EC VERS */
1737         TPV_QI0('1', 'C',  'F', '0'),            /* R30 */
1738         TPV_QI0('1', 'F',  'F', '1'),            /* R31 */
1739         TPV_QI0('1', 'M',  '9', '7'),            /* R32 */
1740         TPV_QI0('1', 'O',  '6', '1'),            /* R40 */
1741         TPV_QI0('1', 'P',  '6', '5'),            /* R40 */
1742         TPV_QI0('1', 'S',  '7', '0'),            /* R40e */
1743         TPV_QI1('1', 'R',  'D', 'R',  '7', '1'), /* R50/p, R51,
1744                                                     T40/p, T41/p, T42/p (1) */
1745         TPV_QI1('1', 'V',  '7', '1',  '2', '8'), /* R50e, R51 (1) */
1746         TPV_QI1('7', '8',  '7', '1',  '0', '6'), /* R51e (1) */
1747         TPV_QI1('7', '6',  '6', '9',  '1', '6'), /* R52 (1) */
1748         TPV_QI1('7', '0',  '6', '9',  '2', '8'), /* R52, T43 (1) */
1749
1750         TPV_QI0('I', 'Y',  '6', '1'),            /* T20 */
1751         TPV_QI0('K', 'Z',  '3', '4'),            /* T21 */
1752         TPV_QI0('1', '6',  '3', '2'),            /* T22 */
1753         TPV_QI1('1', 'A',  '6', '4',  '2', '3'), /* T23 (0) */
1754         TPV_QI1('1', 'I',  '7', '1',  '2', '0'), /* T30 (0) */
1755         TPV_QI1('1', 'Y',  '6', '5',  '2', '9'), /* T43/p (1) */
1756
1757         TPV_QL1('7', '9',  'E', '3',  '5', '0'), /* T60/p */
1758         TPV_QL1('7', 'C',  'D', '2',  '2', '2'), /* R60, R60i */
1759         TPV_QL1('7', 'E',  'D', '0',  '1', '5'), /* R60e, R60i */
1760
1761         /*      BIOS FW    BIOS VERS  EC FW     EC VERS */
1762         TPV_QI2('1', 'W',  '9', '0',  '1', 'V', '2', '8'), /* R50e (1) */
1763         TPV_QL2('7', 'I',  '3', '4',  '7', '9', '5', '0'), /* T60/p wide */
1764
1765         /* X-series ------------------------- */
1766         /*      FW MODEL   BIOS VERS  EC VERS */
1767         TPV_QI0('I', 'Z',  '9', 'D'),            /* X20, X21 */
1768         TPV_QI0('1', 'D',  '7', '0'),            /* X22, X23, X24 */
1769         TPV_QI1('1', 'K',  '4', '8',  '1', '8'), /* X30 (0) */
1770         TPV_QI1('1', 'Q',  '9', '7',  '2', '3'), /* X31, X32 (0) */
1771         TPV_QI1('1', 'U',  'D', '3',  'B', '2'), /* X40 (0) */
1772         TPV_QI1('7', '4',  '6', '4',  '2', '7'), /* X41 (0) */
1773         TPV_QI1('7', '5',  '6', '0',  '2', '0'), /* X41t (0) */
1774
1775         TPV_QL1('7', 'B',  'D', '7',  '4', '0'), /* X60/s */
1776         TPV_QL1('7', 'J',  '3', '0',  '1', '3'), /* X60t */
1777
1778         /* (0) - older versions lack DMI EC fw string and functionality */
1779         /* (1) - older versions known to lack functionality */
1780 };
1781
1782 #undef TPV_QL1
1783 #undef TPV_QL0
1784 #undef TPV_QI2
1785 #undef TPV_QI1
1786 #undef TPV_QI0
1787 #undef TPV_Q_X
1788 #undef TPV_Q
1789
1790 static void __init tpacpi_check_outdated_fw(void)
1791 {
1792         unsigned long fwvers;
1793         u16 ec_version, bios_version;
1794
1795         fwvers = tpacpi_check_quirks(tpacpi_bios_version_qtable,
1796                                 ARRAY_SIZE(tpacpi_bios_version_qtable));
1797
1798         if (!fwvers)
1799                 return;
1800
1801         bios_version = fwvers & 0xffffU;
1802         ec_version = (fwvers >> 16) & 0xffffU;
1803
1804         /* note that unknown versions are set to 0x0000 and we use that */
1805         if ((bios_version > thinkpad_id.bios_release) ||
1806             (ec_version > thinkpad_id.ec_release &&
1807                                 ec_version != TPACPI_MATCH_ANY)) {
1808                 /*
1809                  * The changelogs would let us track down the exact
1810                  * reason, but it is just too much of a pain to track
1811                  * it.  We only list BIOSes that are either really
1812                  * broken, or really stable to begin with, so it is
1813                  * best if the user upgrades the firmware anyway.
1814                  */
1815                 pr_warn("WARNING: Outdated ThinkPad BIOS/EC firmware\n");
1816                 pr_warn("WARNING: This firmware may be missing critical bug "
1817                         "fixes and/or important features\n");
1818         }
1819 }
1820
1821 static bool __init tpacpi_is_fw_known(void)
1822 {
1823         return tpacpi_check_quirks(tpacpi_bios_version_qtable,
1824                         ARRAY_SIZE(tpacpi_bios_version_qtable)) != 0;
1825 }
1826
1827 /****************************************************************************
1828  ****************************************************************************
1829  *
1830  * Subdrivers
1831  *
1832  ****************************************************************************
1833  ****************************************************************************/
1834
1835 /*************************************************************************
1836  * thinkpad-acpi metadata subdriver
1837  */
1838
1839 static int thinkpad_acpi_driver_read(struct seq_file *m)
1840 {
1841         seq_printf(m, "driver:\t\t%s\n", TPACPI_DESC);
1842         seq_printf(m, "version:\t%s\n", TPACPI_VERSION);
1843         return 0;
1844 }
1845
1846 static struct ibm_struct thinkpad_acpi_driver_data = {
1847         .name = "driver",
1848         .read = thinkpad_acpi_driver_read,
1849 };
1850
1851 /*************************************************************************
1852  * Hotkey subdriver
1853  */
1854
1855 /*
1856  * ThinkPad firmware event model
1857  *
1858  * The ThinkPad firmware has two main event interfaces: normal ACPI
1859  * notifications (which follow the ACPI standard), and a private event
1860  * interface.
1861  *
1862  * The private event interface also issues events for the hotkeys.  As
1863  * the driver gained features, the event handling code ended up being
1864  * built around the hotkey subdriver.  This will need to be refactored
1865  * to a more formal event API eventually.
1866  *
1867  * Some "hotkeys" are actually supposed to be used as event reports,
1868  * such as "brightness has changed", "volume has changed", depending on
1869  * the ThinkPad model and how the firmware is operating.
1870  *
1871  * Unlike other classes, hotkey-class events have mask/unmask control on
1872  * non-ancient firmware.  However, how it behaves changes a lot with the
1873  * firmware model and version.
1874  */
1875
1876 enum {  /* hot key scan codes (derived from ACPI DSDT) */
1877         TP_ACPI_HOTKEYSCAN_FNF1         = 0,
1878         TP_ACPI_HOTKEYSCAN_FNF2,
1879         TP_ACPI_HOTKEYSCAN_FNF3,
1880         TP_ACPI_HOTKEYSCAN_FNF4,
1881         TP_ACPI_HOTKEYSCAN_FNF5,
1882         TP_ACPI_HOTKEYSCAN_FNF6,
1883         TP_ACPI_HOTKEYSCAN_FNF7,
1884         TP_ACPI_HOTKEYSCAN_FNF8,
1885         TP_ACPI_HOTKEYSCAN_FNF9,
1886         TP_ACPI_HOTKEYSCAN_FNF10,
1887         TP_ACPI_HOTKEYSCAN_FNF11,
1888         TP_ACPI_HOTKEYSCAN_FNF12,
1889         TP_ACPI_HOTKEYSCAN_FNBACKSPACE,
1890         TP_ACPI_HOTKEYSCAN_FNINSERT,
1891         TP_ACPI_HOTKEYSCAN_FNDELETE,
1892         TP_ACPI_HOTKEYSCAN_FNHOME,
1893         TP_ACPI_HOTKEYSCAN_FNEND,
1894         TP_ACPI_HOTKEYSCAN_FNPAGEUP,
1895         TP_ACPI_HOTKEYSCAN_FNPAGEDOWN,
1896         TP_ACPI_HOTKEYSCAN_FNSPACE,
1897         TP_ACPI_HOTKEYSCAN_VOLUMEUP,
1898         TP_ACPI_HOTKEYSCAN_VOLUMEDOWN,
1899         TP_ACPI_HOTKEYSCAN_MUTE,
1900         TP_ACPI_HOTKEYSCAN_THINKPAD,
1901         TP_ACPI_HOTKEYSCAN_UNK1,
1902         TP_ACPI_HOTKEYSCAN_UNK2,
1903         TP_ACPI_HOTKEYSCAN_UNK3,
1904         TP_ACPI_HOTKEYSCAN_UNK4,
1905         TP_ACPI_HOTKEYSCAN_UNK5,
1906         TP_ACPI_HOTKEYSCAN_UNK6,
1907         TP_ACPI_HOTKEYSCAN_UNK7,
1908         TP_ACPI_HOTKEYSCAN_UNK8,
1909
1910         /* Hotkey keymap size */
1911         TPACPI_HOTKEY_MAP_LEN
1912 };
1913
1914 enum {  /* Keys/events available through NVRAM polling */
1915         TPACPI_HKEY_NVRAM_KNOWN_MASK = 0x00fb88c0U,
1916         TPACPI_HKEY_NVRAM_GOOD_MASK  = 0x00fb8000U,
1917 };
1918
1919 enum {  /* Positions of some of the keys in hotkey masks */
1920         TP_ACPI_HKEY_DISPSWTCH_MASK     = 1 << TP_ACPI_HOTKEYSCAN_FNF7,
1921         TP_ACPI_HKEY_DISPXPAND_MASK     = 1 << TP_ACPI_HOTKEYSCAN_FNF8,
1922         TP_ACPI_HKEY_HIBERNATE_MASK     = 1 << TP_ACPI_HOTKEYSCAN_FNF12,
1923         TP_ACPI_HKEY_BRGHTUP_MASK       = 1 << TP_ACPI_HOTKEYSCAN_FNHOME,
1924         TP_ACPI_HKEY_BRGHTDWN_MASK      = 1 << TP_ACPI_HOTKEYSCAN_FNEND,
1925         TP_ACPI_HKEY_THNKLGHT_MASK      = 1 << TP_ACPI_HOTKEYSCAN_FNPAGEUP,
1926         TP_ACPI_HKEY_ZOOM_MASK          = 1 << TP_ACPI_HOTKEYSCAN_FNSPACE,
1927         TP_ACPI_HKEY_VOLUP_MASK         = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEUP,
1928         TP_ACPI_HKEY_VOLDWN_MASK        = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEDOWN,
1929         TP_ACPI_HKEY_MUTE_MASK          = 1 << TP_ACPI_HOTKEYSCAN_MUTE,
1930         TP_ACPI_HKEY_THINKPAD_MASK      = 1 << TP_ACPI_HOTKEYSCAN_THINKPAD,
1931 };
1932
1933 enum {  /* NVRAM to ACPI HKEY group map */
1934         TP_NVRAM_HKEY_GROUP_HK2         = TP_ACPI_HKEY_THINKPAD_MASK |
1935                                           TP_ACPI_HKEY_ZOOM_MASK |
1936                                           TP_ACPI_HKEY_DISPSWTCH_MASK |
1937                                           TP_ACPI_HKEY_HIBERNATE_MASK,
1938         TP_NVRAM_HKEY_GROUP_BRIGHTNESS  = TP_ACPI_HKEY_BRGHTUP_MASK |
1939                                           TP_ACPI_HKEY_BRGHTDWN_MASK,
1940         TP_NVRAM_HKEY_GROUP_VOLUME      = TP_ACPI_HKEY_VOLUP_MASK |
1941                                           TP_ACPI_HKEY_VOLDWN_MASK |
1942                                           TP_ACPI_HKEY_MUTE_MASK,
1943 };
1944
1945 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1946 struct tp_nvram_state {
1947        u16 thinkpad_toggle:1;
1948        u16 zoom_toggle:1;
1949        u16 display_toggle:1;
1950        u16 thinklight_toggle:1;
1951        u16 hibernate_toggle:1;
1952        u16 displayexp_toggle:1;
1953        u16 display_state:1;
1954        u16 brightness_toggle:1;
1955        u16 volume_toggle:1;
1956        u16 mute:1;
1957
1958        u8 brightness_level;
1959        u8 volume_level;
1960 };
1961
1962 /* kthread for the hotkey poller */
1963 static struct task_struct *tpacpi_hotkey_task;
1964
1965 /* Acquired while the poller kthread is running, use to sync start/stop */
1966 static struct mutex hotkey_thread_mutex;
1967
1968 /*
1969  * Acquire mutex to write poller control variables as an
1970  * atomic block.
1971  *
1972  * Increment hotkey_config_change when changing them if you
1973  * want the kthread to forget old state.
1974  *
1975  * See HOTKEY_CONFIG_CRITICAL_START/HOTKEY_CONFIG_CRITICAL_END
1976  */
1977 static struct mutex hotkey_thread_data_mutex;
1978 static unsigned int hotkey_config_change;
1979
1980 /*
1981  * hotkey poller control variables
1982  *
1983  * Must be atomic or readers will also need to acquire mutex
1984  *
1985  * HOTKEY_CONFIG_CRITICAL_START/HOTKEY_CONFIG_CRITICAL_END
1986  * should be used only when the changes need to be taken as
1987  * a block, OR when one needs to force the kthread to forget
1988  * old state.
1989  */
1990 static u32 hotkey_source_mask;          /* bit mask 0=ACPI,1=NVRAM */
1991 static unsigned int hotkey_poll_freq = 10; /* Hz */
1992
1993 #define HOTKEY_CONFIG_CRITICAL_START \
1994         do { \
1995                 mutex_lock(&hotkey_thread_data_mutex); \
1996                 hotkey_config_change++; \
1997         } while (0);
1998 #define HOTKEY_CONFIG_CRITICAL_END \
1999         mutex_unlock(&hotkey_thread_data_mutex);
2000
2001 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2002
2003 #define hotkey_source_mask 0U
2004 #define HOTKEY_CONFIG_CRITICAL_START
2005 #define HOTKEY_CONFIG_CRITICAL_END
2006
2007 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2008
2009 static struct mutex hotkey_mutex;
2010
2011 static enum {   /* Reasons for waking up */
2012         TP_ACPI_WAKEUP_NONE = 0,        /* None or unknown */
2013         TP_ACPI_WAKEUP_BAYEJ,           /* Bay ejection request */
2014         TP_ACPI_WAKEUP_UNDOCK,          /* Undock request */
2015 } hotkey_wakeup_reason;
2016
2017 static int hotkey_autosleep_ack;
2018
2019 static u32 hotkey_orig_mask;            /* events the BIOS had enabled */
2020 static u32 hotkey_all_mask;             /* all events supported in fw */
2021 static u32 hotkey_reserved_mask;        /* events better left disabled */
2022 static u32 hotkey_driver_mask;          /* events needed by the driver */
2023 static u32 hotkey_user_mask;            /* events visible to userspace */
2024 static u32 hotkey_acpi_mask;            /* events enabled in firmware */
2025
2026 static unsigned int hotkey_report_mode;
2027
2028 static u16 *hotkey_keycode_map;
2029
2030 static struct attribute_set *hotkey_dev_attributes;
2031
2032 static void tpacpi_driver_event(const unsigned int hkey_event);
2033 static void hotkey_driver_event(const unsigned int scancode);
2034 static void hotkey_poll_setup(const bool may_warn);
2035
2036 /* HKEY.MHKG() return bits */
2037 #define TP_HOTKEY_TABLET_MASK (1 << 3)
2038
2039 static int hotkey_get_wlsw(void)
2040 {
2041         int status;
2042
2043         if (!tp_features.hotkey_wlsw)
2044                 return -ENODEV;
2045
2046 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
2047         if (dbg_wlswemul)
2048                 return (tpacpi_wlsw_emulstate) ?
2049                                 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
2050 #endif
2051
2052         if (!acpi_evalf(hkey_handle, &status, "WLSW", "d"))
2053                 return -EIO;
2054
2055         return (status) ? TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
2056 }
2057
2058 static int hotkey_get_tablet_mode(int *status)
2059 {
2060         int s;
2061
2062         if (!acpi_evalf(hkey_handle, &s, "MHKG", "d"))
2063                 return -EIO;
2064
2065         *status = ((s & TP_HOTKEY_TABLET_MASK) != 0);
2066         return 0;
2067 }
2068
2069 /*
2070  * Reads current event mask from firmware, and updates
2071  * hotkey_acpi_mask accordingly.  Also resets any bits
2072  * from hotkey_user_mask that are unavailable to be
2073  * delivered (shadow requirement of the userspace ABI).
2074  *
2075  * Call with hotkey_mutex held
2076  */
2077 static int hotkey_mask_get(void)
2078 {
2079         if (tp_features.hotkey_mask) {
2080                 u32 m = 0;
2081
2082                 if (!acpi_evalf(hkey_handle, &m, "DHKN", "d"))
2083                         return -EIO;
2084
2085                 hotkey_acpi_mask = m;
2086         } else {
2087                 /* no mask support doesn't mean no event support... */
2088                 hotkey_acpi_mask = hotkey_all_mask;
2089         }
2090
2091         /* sync userspace-visible mask */
2092         hotkey_user_mask &= (hotkey_acpi_mask | hotkey_source_mask);
2093
2094         return 0;
2095 }
2096
2097 void static hotkey_mask_warn_incomplete_mask(void)
2098 {
2099         /* log only what the user can fix... */
2100         const u32 wantedmask = hotkey_driver_mask &
2101                 ~(hotkey_acpi_mask | hotkey_source_mask) &
2102                 (hotkey_all_mask | TPACPI_HKEY_NVRAM_KNOWN_MASK);
2103
2104         if (wantedmask)
2105                 pr_notice("required events 0x%08x not enabled!\n", wantedmask);
2106 }
2107
2108 /*
2109  * Set the firmware mask when supported
2110  *
2111  * Also calls hotkey_mask_get to update hotkey_acpi_mask.
2112  *
2113  * NOTE: does not set bits in hotkey_user_mask, but may reset them.
2114  *
2115  * Call with hotkey_mutex held
2116  */
2117 static int hotkey_mask_set(u32 mask)
2118 {
2119         int i;
2120         int rc = 0;
2121
2122         const u32 fwmask = mask & ~hotkey_source_mask;
2123
2124         if (tp_features.hotkey_mask) {
2125                 for (i = 0; i < 32; i++) {
2126                         if (!acpi_evalf(hkey_handle,
2127                                         NULL, "MHKM", "vdd", i + 1,
2128                                         !!(mask & (1 << i)))) {
2129                                 rc = -EIO;
2130                                 break;
2131                         }
2132                 }
2133         }
2134
2135         /*
2136          * We *must* make an inconditional call to hotkey_mask_get to
2137          * refresh hotkey_acpi_mask and update hotkey_user_mask
2138          *
2139          * Take the opportunity to also log when we cannot _enable_
2140          * a given event.
2141          */
2142         if (!hotkey_mask_get() && !rc && (fwmask & ~hotkey_acpi_mask)) {
2143                 pr_notice("asked for hotkey mask 0x%08x, but "
2144                           "firmware forced it to 0x%08x\n",
2145                           fwmask, hotkey_acpi_mask);
2146         }
2147
2148         if (tpacpi_lifecycle != TPACPI_LIFE_EXITING)
2149                 hotkey_mask_warn_incomplete_mask();
2150
2151         return rc;
2152 }
2153
2154 /*
2155  * Sets hotkey_user_mask and tries to set the firmware mask
2156  *
2157  * Call with hotkey_mutex held
2158  */
2159 static int hotkey_user_mask_set(const u32 mask)
2160 {
2161         int rc;
2162
2163         /* Give people a chance to notice they are doing something that
2164          * is bound to go boom on their users sooner or later */
2165         if (!tp_warned.hotkey_mask_ff &&
2166             (mask == 0xffff || mask == 0xffffff ||
2167              mask == 0xffffffff)) {
2168                 tp_warned.hotkey_mask_ff = 1;
2169                 pr_notice("setting the hotkey mask to 0x%08x is likely "
2170                           "not the best way to go about it\n", mask);
2171                 pr_notice("please consider using the driver defaults, "
2172                           "and refer to up-to-date thinkpad-acpi "
2173                           "documentation\n");
2174         }
2175
2176         /* Try to enable what the user asked for, plus whatever we need.
2177          * this syncs everything but won't enable bits in hotkey_user_mask */
2178         rc = hotkey_mask_set((mask | hotkey_driver_mask) & ~hotkey_source_mask);
2179
2180         /* Enable the available bits in hotkey_user_mask */
2181         hotkey_user_mask = mask & (hotkey_acpi_mask | hotkey_source_mask);
2182
2183         return rc;
2184 }
2185
2186 /*
2187  * Sets the driver hotkey mask.
2188  *
2189  * Can be called even if the hotkey subdriver is inactive
2190  */
2191 static int tpacpi_hotkey_driver_mask_set(const u32 mask)
2192 {
2193         int rc;
2194
2195         /* Do the right thing if hotkey_init has not been called yet */
2196         if (!tp_features.hotkey) {
2197                 hotkey_driver_mask = mask;
2198                 return 0;
2199         }
2200
2201         mutex_lock(&hotkey_mutex);
2202
2203         HOTKEY_CONFIG_CRITICAL_START
2204         hotkey_driver_mask = mask;
2205 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2206         hotkey_source_mask |= (mask & ~hotkey_all_mask);
2207 #endif
2208         HOTKEY_CONFIG_CRITICAL_END
2209
2210         rc = hotkey_mask_set((hotkey_acpi_mask | hotkey_driver_mask) &
2211                                                         ~hotkey_source_mask);
2212         hotkey_poll_setup(true);
2213
2214         mutex_unlock(&hotkey_mutex);
2215
2216         return rc;
2217 }
2218
2219 static int hotkey_status_get(int *status)
2220 {
2221         if (!acpi_evalf(hkey_handle, status, "DHKC", "d"))
2222                 return -EIO;
2223
2224         return 0;
2225 }
2226
2227 static int hotkey_status_set(bool enable)
2228 {
2229         if (!acpi_evalf(hkey_handle, NULL, "MHKC", "vd", enable ? 1 : 0))
2230                 return -EIO;
2231
2232         return 0;
2233 }
2234
2235 static void tpacpi_input_send_tabletsw(void)
2236 {
2237         int state;
2238
2239         if (tp_features.hotkey_tablet &&
2240             !hotkey_get_tablet_mode(&state)) {
2241                 mutex_lock(&tpacpi_inputdev_send_mutex);
2242
2243                 input_report_switch(tpacpi_inputdev,
2244                                     SW_TABLET_MODE, !!state);
2245                 input_sync(tpacpi_inputdev);
2246
2247                 mutex_unlock(&tpacpi_inputdev_send_mutex);
2248         }
2249 }
2250
2251 /* Do NOT call without validating scancode first */
2252 static void tpacpi_input_send_key(const unsigned int scancode)
2253 {
2254         const unsigned int keycode = hotkey_keycode_map[scancode];
2255
2256         if (keycode != KEY_RESERVED) {
2257                 mutex_lock(&tpacpi_inputdev_send_mutex);
2258
2259                 input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN, scancode);
2260                 input_report_key(tpacpi_inputdev, keycode, 1);
2261                 input_sync(tpacpi_inputdev);
2262
2263                 input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN, scancode);
2264                 input_report_key(tpacpi_inputdev, keycode, 0);
2265                 input_sync(tpacpi_inputdev);
2266
2267                 mutex_unlock(&tpacpi_inputdev_send_mutex);
2268         }
2269 }
2270
2271 /* Do NOT call without validating scancode first */
2272 static void tpacpi_input_send_key_masked(const unsigned int scancode)
2273 {
2274         hotkey_driver_event(scancode);
2275         if (hotkey_user_mask & (1 << scancode))
2276                 tpacpi_input_send_key(scancode);
2277 }
2278
2279 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2280 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver;
2281
2282 /* Do NOT call without validating scancode first */
2283 static void tpacpi_hotkey_send_key(unsigned int scancode)
2284 {
2285         tpacpi_input_send_key_masked(scancode);
2286         if (hotkey_report_mode < 2) {
2287                 acpi_bus_generate_proc_event(ibm_hotkey_acpidriver.device,
2288                                 0x80, TP_HKEY_EV_HOTKEY_BASE + scancode);
2289         }
2290 }
2291
2292 static void hotkey_read_nvram(struct tp_nvram_state *n, const u32 m)
2293 {
2294         u8 d;
2295
2296         if (m & TP_NVRAM_HKEY_GROUP_HK2) {
2297                 d = nvram_read_byte(TP_NVRAM_ADDR_HK2);
2298                 n->thinkpad_toggle = !!(d & TP_NVRAM_MASK_HKT_THINKPAD);
2299                 n->zoom_toggle = !!(d & TP_NVRAM_MASK_HKT_ZOOM);
2300                 n->display_toggle = !!(d & TP_NVRAM_MASK_HKT_DISPLAY);
2301                 n->hibernate_toggle = !!(d & TP_NVRAM_MASK_HKT_HIBERNATE);
2302         }
2303         if (m & TP_ACPI_HKEY_THNKLGHT_MASK) {
2304                 d = nvram_read_byte(TP_NVRAM_ADDR_THINKLIGHT);
2305                 n->thinklight_toggle = !!(d & TP_NVRAM_MASK_THINKLIGHT);
2306         }
2307         if (m & TP_ACPI_HKEY_DISPXPAND_MASK) {
2308                 d = nvram_read_byte(TP_NVRAM_ADDR_VIDEO);
2309                 n->displayexp_toggle =
2310                                 !!(d & TP_NVRAM_MASK_HKT_DISPEXPND);
2311         }
2312         if (m & TP_NVRAM_HKEY_GROUP_BRIGHTNESS) {
2313                 d = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS);
2314                 n->brightness_level = (d & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
2315                                 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
2316                 n->brightness_toggle =
2317                                 !!(d & TP_NVRAM_MASK_HKT_BRIGHTNESS);
2318         }
2319         if (m & TP_NVRAM_HKEY_GROUP_VOLUME) {
2320                 d = nvram_read_byte(TP_NVRAM_ADDR_MIXER);
2321                 n->volume_level = (d & TP_NVRAM_MASK_LEVEL_VOLUME)
2322                                 >> TP_NVRAM_POS_LEVEL_VOLUME;
2323                 n->mute = !!(d & TP_NVRAM_MASK_MUTE);
2324                 n->volume_toggle = !!(d & TP_NVRAM_MASK_HKT_VOLUME);
2325         }
2326 }
2327
2328 static void hotkey_compare_and_issue_event(struct tp_nvram_state *oldn,
2329                                            struct tp_nvram_state *newn,
2330                                            const u32 event_mask)
2331 {
2332
2333 #define TPACPI_COMPARE_KEY(__scancode, __member) \
2334         do { \
2335                 if ((event_mask & (1 << __scancode)) && \
2336                     oldn->__member != newn->__member) \
2337                         tpacpi_hotkey_send_key(__scancode); \
2338         } while (0)
2339
2340 #define TPACPI_MAY_SEND_KEY(__scancode) \
2341         do { \
2342                 if (event_mask & (1 << __scancode)) \
2343                         tpacpi_hotkey_send_key(__scancode); \
2344         } while (0)
2345
2346         void issue_volchange(const unsigned int oldvol,
2347                              const unsigned int newvol)
2348         {
2349                 unsigned int i = oldvol;
2350
2351                 while (i > newvol) {
2352                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
2353                         i--;
2354                 }
2355                 while (i < newvol) {
2356                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
2357                         i++;
2358                 }
2359         }
2360
2361         void issue_brightnesschange(const unsigned int oldbrt,
2362                                     const unsigned int newbrt)
2363         {
2364                 unsigned int i = oldbrt;
2365
2366                 while (i > newbrt) {
2367                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
2368                         i--;
2369                 }
2370                 while (i < newbrt) {
2371                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
2372                         i++;
2373                 }
2374         }
2375
2376         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_THINKPAD, thinkpad_toggle);
2377         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNSPACE, zoom_toggle);
2378         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF7, display_toggle);
2379         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF12, hibernate_toggle);
2380
2381         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNPAGEUP, thinklight_toggle);
2382
2383         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF8, displayexp_toggle);
2384
2385         /*
2386          * Handle volume
2387          *
2388          * This code is supposed to duplicate the IBM firmware behaviour:
2389          * - Pressing MUTE issues mute hotkey message, even when already mute
2390          * - Pressing Volume up/down issues volume up/down hotkey messages,
2391          *   even when already at maximum or minimum volume
2392          * - The act of unmuting issues volume up/down notification,
2393          *   depending which key was used to unmute
2394          *
2395          * We are constrained to what the NVRAM can tell us, which is not much
2396          * and certainly not enough if more than one volume hotkey was pressed
2397          * since the last poll cycle.
2398          *
2399          * Just to make our life interesting, some newer Lenovo ThinkPads have
2400          * bugs in the BIOS and may fail to update volume_toggle properly.
2401          */
2402         if (newn->mute) {
2403                 /* muted */
2404                 if (!oldn->mute ||
2405                     oldn->volume_toggle != newn->volume_toggle ||
2406                     oldn->volume_level != newn->volume_level) {
2407                         /* recently muted, or repeated mute keypress, or
2408                          * multiple presses ending in mute */
2409                         issue_volchange(oldn->volume_level, newn->volume_level);
2410                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE);
2411                 }
2412         } else {
2413                 /* unmute */
2414                 if (oldn->mute) {
2415                         /* recently unmuted, issue 'unmute' keypress */
2416                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
2417                 }
2418                 if (oldn->volume_level != newn->volume_level) {
2419                         issue_volchange(oldn->volume_level, newn->volume_level);
2420                 } else if (oldn->volume_toggle != newn->volume_toggle) {
2421                         /* repeated vol up/down keypress at end of scale ? */
2422                         if (newn->volume_level == 0)
2423                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
2424                         else if (newn->volume_level >= TP_NVRAM_LEVEL_VOLUME_MAX)
2425                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
2426                 }
2427         }
2428
2429         /* handle brightness */
2430         if (oldn->brightness_level != newn->brightness_level) {
2431                 issue_brightnesschange(oldn->brightness_level,
2432                                        newn->brightness_level);
2433         } else if (oldn->brightness_toggle != newn->brightness_toggle) {
2434                 /* repeated key presses that didn't change state */
2435                 if (newn->brightness_level == 0)
2436                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
2437                 else if (newn->brightness_level >= bright_maxlvl
2438                                 && !tp_features.bright_unkfw)
2439                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
2440         }
2441
2442 #undef TPACPI_COMPARE_KEY
2443 #undef TPACPI_MAY_SEND_KEY
2444 }
2445
2446 /*
2447  * Polling driver
2448  *
2449  * We track all events in hotkey_source_mask all the time, since
2450  * most of them are edge-based.  We only issue those requested by
2451  * hotkey_user_mask or hotkey_driver_mask, though.
2452  */
2453 static int hotkey_kthread(void *data)
2454 {
2455         struct tp_nvram_state s[2];
2456         u32 poll_mask, event_mask;
2457         unsigned int si, so;
2458         unsigned long t;
2459         unsigned int change_detector, must_reset;
2460         unsigned int poll_freq;
2461
2462         mutex_lock(&hotkey_thread_mutex);
2463
2464         if (tpacpi_lifecycle == TPACPI_LIFE_EXITING)
2465                 goto exit;
2466
2467         set_freezable();
2468
2469         so = 0;
2470         si = 1;
2471         t = 0;
2472
2473         /* Initial state for compares */
2474         mutex_lock(&hotkey_thread_data_mutex);
2475         change_detector = hotkey_config_change;
2476         poll_mask = hotkey_source_mask;
2477         event_mask = hotkey_source_mask &
2478                         (hotkey_driver_mask | hotkey_user_mask);
2479         poll_freq = hotkey_poll_freq;
2480         mutex_unlock(&hotkey_thread_data_mutex);
2481         hotkey_read_nvram(&s[so], poll_mask);
2482
2483         while (!kthread_should_stop()) {
2484                 if (t == 0) {
2485                         if (likely(poll_freq))
2486                                 t = 1000/poll_freq;
2487                         else
2488                                 t = 100;        /* should never happen... */
2489                 }
2490                 t = msleep_interruptible(t);
2491                 if (unlikely(kthread_should_stop()))
2492                         break;
2493                 must_reset = try_to_freeze();
2494                 if (t > 0 && !must_reset)
2495                         continue;
2496
2497                 mutex_lock(&hotkey_thread_data_mutex);
2498                 if (must_reset || hotkey_config_change != change_detector) {
2499                         /* forget old state on thaw or config change */
2500                         si = so;
2501                         t = 0;
2502                         change_detector = hotkey_config_change;
2503                 }
2504                 poll_mask = hotkey_source_mask;
2505                 event_mask = hotkey_source_mask &
2506                                 (hotkey_driver_mask | hotkey_user_mask);
2507                 poll_freq = hotkey_poll_freq;
2508                 mutex_unlock(&hotkey_thread_data_mutex);
2509
2510                 if (likely(poll_mask)) {
2511                         hotkey_read_nvram(&s[si], poll_mask);
2512                         if (likely(si != so)) {
2513                                 hotkey_compare_and_issue_event(&s[so], &s[si],
2514                                                                 event_mask);
2515                         }
2516                 }
2517
2518                 so = si;
2519                 si ^= 1;
2520         }
2521
2522 exit:
2523         mutex_unlock(&hotkey_thread_mutex);
2524         return 0;
2525 }
2526
2527 /* call with hotkey_mutex held */
2528 static void hotkey_poll_stop_sync(void)
2529 {
2530         if (tpacpi_hotkey_task) {
2531                 if (frozen(tpacpi_hotkey_task) ||
2532                     freezing(tpacpi_hotkey_task))
2533                         thaw_process(tpacpi_hotkey_task);
2534
2535                 kthread_stop(tpacpi_hotkey_task);
2536                 tpacpi_hotkey_task = NULL;
2537                 mutex_lock(&hotkey_thread_mutex);
2538                 /* at this point, the thread did exit */
2539                 mutex_unlock(&hotkey_thread_mutex);
2540         }
2541 }
2542
2543 /* call with hotkey_mutex held */
2544 static void hotkey_poll_setup(const bool may_warn)
2545 {
2546         const u32 poll_driver_mask = hotkey_driver_mask & hotkey_source_mask;
2547         const u32 poll_user_mask = hotkey_user_mask & hotkey_source_mask;
2548
2549         if (hotkey_poll_freq > 0 &&
2550             (poll_driver_mask ||
2551              (poll_user_mask && tpacpi_inputdev->users > 0))) {
2552                 if (!tpacpi_hotkey_task) {
2553                         tpacpi_hotkey_task = kthread_run(hotkey_kthread,
2554                                         NULL, TPACPI_NVRAM_KTHREAD_NAME);
2555                         if (IS_ERR(tpacpi_hotkey_task)) {
2556                                 tpacpi_hotkey_task = NULL;
2557                                 pr_err("could not create kernel thread "
2558                                        "for hotkey polling\n");
2559                         }
2560                 }
2561         } else {
2562                 hotkey_poll_stop_sync();
2563                 if (may_warn && (poll_driver_mask || poll_user_mask) &&
2564                     hotkey_poll_freq == 0) {
2565                         pr_notice("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(const 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(const bool __unused)
2592 {
2593 }
2594
2595 static void hotkey_poll_setup_safe(const bool __unused)
2596 {
2597 }
2598
2599 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2600
2601 static int hotkey_inputdev_open(struct input_dev *dev)
2602 {
2603         switch (tpacpi_lifecycle) {
2604         case TPACPI_LIFE_INIT:
2605         case TPACPI_LIFE_RUNNING:
2606                 hotkey_poll_setup_safe(false);
2607                 return 0;
2608         case TPACPI_LIFE_EXITING:
2609                 return -EBUSY;
2610         }
2611
2612         /* Should only happen if tpacpi_lifecycle is corrupt */
2613         BUG();
2614         return -EBUSY;
2615 }
2616
2617 static void hotkey_inputdev_close(struct input_dev *dev)
2618 {
2619         /* disable hotkey polling when possible */
2620         if (tpacpi_lifecycle != TPACPI_LIFE_EXITING &&
2621             !(hotkey_source_mask & hotkey_driver_mask))
2622                 hotkey_poll_setup_safe(false);
2623 }
2624
2625 /* sysfs hotkey enable ------------------------------------------------- */
2626 static ssize_t hotkey_enable_show(struct device *dev,
2627                            struct device_attribute *attr,
2628                            char *buf)
2629 {
2630         int res, status;
2631
2632         printk_deprecated_attribute("hotkey_enable",
2633                         "Hotkey reporting is always enabled");
2634
2635         res = hotkey_status_get(&status);
2636         if (res)
2637                 return res;
2638
2639         return snprintf(buf, PAGE_SIZE, "%d\n", status);
2640 }
2641
2642 static ssize_t hotkey_enable_store(struct device *dev,
2643                             struct device_attribute *attr,
2644                             const char *buf, size_t count)
2645 {
2646         unsigned long t;
2647
2648         printk_deprecated_attribute("hotkey_enable",
2649                         "Hotkeys can be disabled through hotkey_mask");
2650
2651         if (parse_strtoul(buf, 1, &t))
2652                 return -EINVAL;
2653
2654         if (t == 0)
2655                 return -EPERM;
2656
2657         return count;
2658 }
2659
2660 static struct device_attribute dev_attr_hotkey_enable =
2661         __ATTR(hotkey_enable, S_IWUSR | S_IRUGO,
2662                 hotkey_enable_show, hotkey_enable_store);
2663
2664 /* sysfs hotkey mask --------------------------------------------------- */
2665 static ssize_t hotkey_mask_show(struct device *dev,
2666                            struct device_attribute *attr,
2667                            char *buf)
2668 {
2669         return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_user_mask);
2670 }
2671
2672 static ssize_t hotkey_mask_store(struct device *dev,
2673                             struct device_attribute *attr,
2674                             const char *buf, size_t count)
2675 {
2676         unsigned long t;
2677         int res;
2678
2679         if (parse_strtoul(buf, 0xffffffffUL, &t))
2680                 return -EINVAL;
2681
2682         if (mutex_lock_killable(&hotkey_mutex))
2683                 return -ERESTARTSYS;
2684
2685         res = hotkey_user_mask_set(t);
2686
2687 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2688         hotkey_poll_setup(true);
2689 #endif
2690
2691         mutex_unlock(&hotkey_mutex);
2692
2693         tpacpi_disclose_usertask("hotkey_mask", "set to 0x%08lx\n", t);
2694
2695         return (res) ? res : count;
2696 }
2697
2698 static struct device_attribute dev_attr_hotkey_mask =
2699         __ATTR(hotkey_mask, S_IWUSR | S_IRUGO,
2700                 hotkey_mask_show, hotkey_mask_store);
2701
2702 /* sysfs hotkey bios_enabled ------------------------------------------- */
2703 static ssize_t hotkey_bios_enabled_show(struct device *dev,
2704                            struct device_attribute *attr,
2705                            char *buf)
2706 {
2707         return sprintf(buf, "0\n");
2708 }
2709
2710 static struct device_attribute dev_attr_hotkey_bios_enabled =
2711         __ATTR(hotkey_bios_enabled, S_IRUGO, hotkey_bios_enabled_show, NULL);
2712
2713 /* sysfs hotkey bios_mask ---------------------------------------------- */
2714 static ssize_t hotkey_bios_mask_show(struct device *dev,
2715                            struct device_attribute *attr,
2716                            char *buf)
2717 {
2718         printk_deprecated_attribute("hotkey_bios_mask",
2719                         "This attribute is useless.");
2720         return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_orig_mask);
2721 }
2722
2723 static struct device_attribute dev_attr_hotkey_bios_mask =
2724         __ATTR(hotkey_bios_mask, S_IRUGO, hotkey_bios_mask_show, NULL);
2725
2726 /* sysfs hotkey all_mask ----------------------------------------------- */
2727 static ssize_t hotkey_all_mask_show(struct device *dev,
2728                            struct device_attribute *attr,
2729                            char *buf)
2730 {
2731         return snprintf(buf, PAGE_SIZE, "0x%08x\n",
2732                                 hotkey_all_mask | hotkey_source_mask);
2733 }
2734
2735 static struct device_attribute dev_attr_hotkey_all_mask =
2736         __ATTR(hotkey_all_mask, S_IRUGO, hotkey_all_mask_show, NULL);
2737
2738 /* sysfs hotkey recommended_mask --------------------------------------- */
2739 static ssize_t hotkey_recommended_mask_show(struct device *dev,
2740                                             struct device_attribute *attr,
2741                                             char *buf)
2742 {
2743         return snprintf(buf, PAGE_SIZE, "0x%08x\n",
2744                         (hotkey_all_mask | hotkey_source_mask)
2745                         & ~hotkey_reserved_mask);
2746 }
2747
2748 static struct device_attribute dev_attr_hotkey_recommended_mask =
2749         __ATTR(hotkey_recommended_mask, S_IRUGO,
2750                 hotkey_recommended_mask_show, NULL);
2751
2752 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2753
2754 /* sysfs hotkey hotkey_source_mask ------------------------------------- */
2755 static ssize_t hotkey_source_mask_show(struct device *dev,
2756                            struct device_attribute *attr,
2757                            char *buf)
2758 {
2759         return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_source_mask);
2760 }
2761
2762 static ssize_t hotkey_source_mask_store(struct device *dev,
2763                             struct device_attribute *attr,
2764                             const char *buf, size_t count)
2765 {
2766         unsigned long t;
2767         u32 r_ev;
2768         int rc;
2769
2770         if (parse_strtoul(buf, 0xffffffffUL, &t) ||
2771                 ((t & ~TPACPI_HKEY_NVRAM_KNOWN_MASK) != 0))
2772                 return -EINVAL;
2773
2774         if (mutex_lock_killable(&hotkey_mutex))
2775                 return -ERESTARTSYS;
2776
2777         HOTKEY_CONFIG_CRITICAL_START
2778         hotkey_source_mask = t;
2779         HOTKEY_CONFIG_CRITICAL_END
2780
2781         rc = hotkey_mask_set((hotkey_user_mask | hotkey_driver_mask) &
2782                         ~hotkey_source_mask);
2783         hotkey_poll_setup(true);
2784
2785         /* check if events needed by the driver got disabled */
2786         r_ev = hotkey_driver_mask & ~(hotkey_acpi_mask & hotkey_all_mask)
2787                 & ~hotkey_source_mask & TPACPI_HKEY_NVRAM_KNOWN_MASK;
2788
2789         mutex_unlock(&hotkey_mutex);
2790
2791         if (rc < 0)
2792                 pr_err("hotkey_source_mask: "
2793                        "failed to update the firmware event mask!\n");
2794
2795         if (r_ev)
2796                 pr_notice("hotkey_source_mask: "
2797                           "some important events were disabled: 0x%04x\n",
2798                           r_ev);
2799
2800         tpacpi_disclose_usertask("hotkey_source_mask", "set to 0x%08lx\n", t);
2801
2802         return (rc < 0) ? rc : count;
2803 }
2804
2805 static struct device_attribute dev_attr_hotkey_source_mask =
2806         __ATTR(hotkey_source_mask, S_IWUSR | S_IRUGO,
2807                 hotkey_source_mask_show, hotkey_source_mask_store);
2808
2809 /* sysfs hotkey hotkey_poll_freq --------------------------------------- */
2810 static ssize_t hotkey_poll_freq_show(struct device *dev,
2811                            struct device_attribute *attr,
2812                            char *buf)
2813 {
2814         return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_poll_freq);
2815 }
2816
2817 static ssize_t hotkey_poll_freq_store(struct device *dev,
2818                             struct device_attribute *attr,
2819                             const char *buf, size_t count)
2820 {
2821         unsigned long t;
2822
2823         if (parse_strtoul(buf, 25, &t))
2824                 return -EINVAL;
2825
2826         if (mutex_lock_killable(&hotkey_mutex))
2827                 return -ERESTARTSYS;
2828
2829         hotkey_poll_set_freq(t);
2830         hotkey_poll_setup(true);
2831
2832         mutex_unlock(&hotkey_mutex);
2833
2834         tpacpi_disclose_usertask("hotkey_poll_freq", "set to %lu\n", t);
2835
2836         return count;
2837 }
2838
2839 static struct device_attribute dev_attr_hotkey_poll_freq =
2840         __ATTR(hotkey_poll_freq, S_IWUSR | S_IRUGO,
2841                 hotkey_poll_freq_show, hotkey_poll_freq_store);
2842
2843 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2844
2845 /* sysfs hotkey radio_sw (pollable) ------------------------------------ */
2846 static ssize_t hotkey_radio_sw_show(struct device *dev,
2847                            struct device_attribute *attr,
2848                            char *buf)
2849 {
2850         int res;
2851         res = hotkey_get_wlsw();
2852         if (res < 0)
2853                 return res;
2854
2855         /* Opportunistic update */
2856         tpacpi_rfk_update_hwblock_state((res == TPACPI_RFK_RADIO_OFF));
2857
2858         return snprintf(buf, PAGE_SIZE, "%d\n",
2859                         (res == TPACPI_RFK_RADIO_OFF) ? 0 : 1);
2860 }
2861
2862 static struct device_attribute dev_attr_hotkey_radio_sw =
2863         __ATTR(hotkey_radio_sw, S_IRUGO, hotkey_radio_sw_show, NULL);
2864
2865 static void hotkey_radio_sw_notify_change(void)
2866 {
2867         if (tp_features.hotkey_wlsw)
2868                 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2869                              "hotkey_radio_sw");
2870 }
2871
2872 /* sysfs hotkey tablet mode (pollable) --------------------------------- */
2873 static ssize_t hotkey_tablet_mode_show(struct device *dev,
2874                            struct device_attribute *attr,
2875                            char *buf)
2876 {
2877         int res, s;
2878         res = hotkey_get_tablet_mode(&s);
2879         if (res < 0)
2880                 return res;
2881
2882         return snprintf(buf, PAGE_SIZE, "%d\n", !!s);
2883 }
2884
2885 static struct device_attribute dev_attr_hotkey_tablet_mode =
2886         __ATTR(hotkey_tablet_mode, S_IRUGO, hotkey_tablet_mode_show, NULL);
2887
2888 static void hotkey_tablet_mode_notify_change(void)
2889 {
2890         if (tp_features.hotkey_tablet)
2891                 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2892                              "hotkey_tablet_mode");
2893 }
2894
2895 /* sysfs hotkey report_mode -------------------------------------------- */
2896 static ssize_t hotkey_report_mode_show(struct device *dev,
2897                            struct device_attribute *attr,
2898                            char *buf)
2899 {
2900         return snprintf(buf, PAGE_SIZE, "%d\n",
2901                 (hotkey_report_mode != 0) ? hotkey_report_mode : 1);
2902 }
2903
2904 static struct device_attribute dev_attr_hotkey_report_mode =
2905         __ATTR(hotkey_report_mode, S_IRUGO, hotkey_report_mode_show, NULL);
2906
2907 /* sysfs wakeup reason (pollable) -------------------------------------- */
2908 static ssize_t hotkey_wakeup_reason_show(struct device *dev,
2909                            struct device_attribute *attr,
2910                            char *buf)
2911 {
2912         return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_wakeup_reason);
2913 }
2914
2915 static struct device_attribute dev_attr_hotkey_wakeup_reason =
2916         __ATTR(wakeup_reason, S_IRUGO, hotkey_wakeup_reason_show, NULL);
2917
2918 static void hotkey_wakeup_reason_notify_change(void)
2919 {
2920         sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2921                      "wakeup_reason");
2922 }
2923
2924 /* sysfs wakeup hotunplug_complete (pollable) -------------------------- */
2925 static ssize_t hotkey_wakeup_hotunplug_complete_show(struct device *dev,
2926                            struct device_attribute *attr,
2927                            char *buf)
2928 {
2929         return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_autosleep_ack);
2930 }
2931
2932 static struct device_attribute dev_attr_hotkey_wakeup_hotunplug_complete =
2933         __ATTR(wakeup_hotunplug_complete, S_IRUGO,
2934                hotkey_wakeup_hotunplug_complete_show, NULL);
2935
2936 static void hotkey_wakeup_hotunplug_complete_notify_change(void)
2937 {
2938         sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2939                      "wakeup_hotunplug_complete");
2940 }
2941
2942 /* --------------------------------------------------------------------- */
2943
2944 static struct attribute *hotkey_attributes[] __initdata = {
2945         &dev_attr_hotkey_enable.attr,
2946         &dev_attr_hotkey_bios_enabled.attr,
2947         &dev_attr_hotkey_bios_mask.attr,
2948         &dev_attr_hotkey_report_mode.attr,
2949         &dev_attr_hotkey_wakeup_reason.attr,
2950         &dev_attr_hotkey_wakeup_hotunplug_complete.attr,
2951         &dev_attr_hotkey_mask.attr,
2952         &dev_attr_hotkey_all_mask.attr,
2953         &dev_attr_hotkey_recommended_mask.attr,
2954 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2955         &dev_attr_hotkey_source_mask.attr,
2956         &dev_attr_hotkey_poll_freq.attr,
2957 #endif
2958 };
2959
2960 /*
2961  * Sync both the hw and sw blocking state of all switches
2962  */
2963 static void tpacpi_send_radiosw_update(void)
2964 {
2965         int wlsw;
2966
2967         /*
2968          * We must sync all rfkill controllers *before* issuing any
2969          * rfkill input events, or we will race the rfkill core input
2970          * handler.
2971          *
2972          * tpacpi_inputdev_send_mutex works as a synchronization point
2973          * for the above.
2974          *
2975          * We optimize to avoid numerous calls to hotkey_get_wlsw.
2976          */
2977
2978         wlsw = hotkey_get_wlsw();
2979
2980         /* Sync hw blocking state first if it is hw-blocked */
2981         if (wlsw == TPACPI_RFK_RADIO_OFF)
2982                 tpacpi_rfk_update_hwblock_state(true);
2983
2984         /* Sync sw blocking state */
2985         tpacpi_rfk_update_swstate_all();
2986
2987         /* Sync hw blocking state last if it is hw-unblocked */
2988         if (wlsw == TPACPI_RFK_RADIO_ON)
2989                 tpacpi_rfk_update_hwblock_state(false);
2990
2991         /* Issue rfkill input event for WLSW switch */
2992         if (!(wlsw < 0)) {
2993                 mutex_lock(&tpacpi_inputdev_send_mutex);
2994
2995                 input_report_switch(tpacpi_inputdev,
2996                                     SW_RFKILL_ALL, (wlsw > 0));
2997                 input_sync(tpacpi_inputdev);
2998
2999                 mutex_unlock(&tpacpi_inputdev_send_mutex);
3000         }
3001
3002         /*
3003          * this can be unconditional, as we will poll state again
3004          * if userspace uses the notify to read data
3005          */
3006         hotkey_radio_sw_notify_change();
3007 }
3008
3009 static void hotkey_exit(void)
3010 {
3011 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
3012         mutex_lock(&hotkey_mutex);
3013         hotkey_poll_stop_sync();
3014         mutex_unlock(&hotkey_mutex);
3015 #endif
3016
3017         if (hotkey_dev_attributes)
3018                 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
3019
3020         kfree(hotkey_keycode_map);
3021
3022         dbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_HKEY,
3023                    "restoring original HKEY status and mask\n");
3024         /* yes, there is a bitwise or below, we want the
3025          * functions to be called even if one of them fail */
3026         if (((tp_features.hotkey_mask &&
3027               hotkey_mask_set(hotkey_orig_mask)) |
3028              hotkey_status_set(false)) != 0)
3029                 pr_err("failed to restore hot key mask "
3030                        "to BIOS defaults\n");
3031 }
3032
3033 static void __init hotkey_unmap(const unsigned int scancode)
3034 {
3035         if (hotkey_keycode_map[scancode] != KEY_RESERVED) {
3036                 clear_bit(hotkey_keycode_map[scancode],
3037                           tpacpi_inputdev->keybit);
3038                 hotkey_keycode_map[scancode] = KEY_RESERVED;
3039         }
3040 }
3041
3042 /*
3043  * HKEY quirks:
3044  *   TPACPI_HK_Q_INIMASK:       Supports FN+F3,FN+F4,FN+F12
3045  */
3046
3047 #define TPACPI_HK_Q_INIMASK     0x0001
3048
3049 static const struct tpacpi_quirk tpacpi_hotkey_qtable[] __initconst = {
3050         TPACPI_Q_IBM('I', 'H', TPACPI_HK_Q_INIMASK), /* 600E */
3051         TPACPI_Q_IBM('I', 'N', TPACPI_HK_Q_INIMASK), /* 600E */
3052         TPACPI_Q_IBM('I', 'D', TPACPI_HK_Q_INIMASK), /* 770, 770E, 770ED */
3053         TPACPI_Q_IBM('I', 'W', TPACPI_HK_Q_INIMASK), /* A20m */
3054         TPACPI_Q_IBM('I', 'V', TPACPI_HK_Q_INIMASK), /* A20p */
3055         TPACPI_Q_IBM('1', '0', TPACPI_HK_Q_INIMASK), /* A21e, A22e */
3056         TPACPI_Q_IBM('K', 'U', TPACPI_HK_Q_INIMASK), /* A21e */
3057         TPACPI_Q_IBM('K', 'X', TPACPI_HK_Q_INIMASK), /* A21m, A22m */
3058         TPACPI_Q_IBM('K', 'Y', TPACPI_HK_Q_INIMASK), /* A21p, A22p */
3059         TPACPI_Q_IBM('1', 'B', TPACPI_HK_Q_INIMASK), /* A22e */
3060         TPACPI_Q_IBM('1', '3', TPACPI_HK_Q_INIMASK), /* A22m */
3061         TPACPI_Q_IBM('1', 'E', TPACPI_HK_Q_INIMASK), /* A30/p (0) */
3062         TPACPI_Q_IBM('1', 'C', TPACPI_HK_Q_INIMASK), /* R30 */
3063         TPACPI_Q_IBM('1', 'F', TPACPI_HK_Q_INIMASK), /* R31 */
3064         TPACPI_Q_IBM('I', 'Y', TPACPI_HK_Q_INIMASK), /* T20 */
3065         TPACPI_Q_IBM('K', 'Z', TPACPI_HK_Q_INIMASK), /* T21 */
3066         TPACPI_Q_IBM('1', '6', TPACPI_HK_Q_INIMASK), /* T22 */
3067         TPACPI_Q_IBM('I', 'Z', TPACPI_HK_Q_INIMASK), /* X20, X21 */
3068         TPACPI_Q_IBM('1', 'D', TPACPI_HK_Q_INIMASK), /* X22, X23, X24 */
3069 };
3070
3071 typedef u16 tpacpi_keymap_entry_t;
3072 typedef tpacpi_keymap_entry_t tpacpi_keymap_t[TPACPI_HOTKEY_MAP_LEN];
3073
3074 static int __init hotkey_init(struct ibm_init_struct *iibm)
3075 {
3076         /* Requirements for changing the default keymaps:
3077          *
3078          * 1. Many of the keys are mapped to KEY_RESERVED for very
3079          *    good reasons.  Do not change them unless you have deep
3080          *    knowledge on the IBM and Lenovo ThinkPad firmware for
3081          *    the various ThinkPad models.  The driver behaves
3082          *    differently for KEY_RESERVED: such keys have their
3083          *    hot key mask *unset* in mask_recommended, and also
3084          *    in the initial hot key mask programmed into the
3085          *    firmware at driver load time, which means the firm-
3086          *    ware may react very differently if you change them to
3087          *    something else;
3088          *
3089          * 2. You must be subscribed to the linux-thinkpad and
3090          *    ibm-acpi-devel mailing lists, and you should read the
3091          *    list archives since 2007 if you want to change the
3092          *    keymaps.  This requirement exists so that you will
3093          *    know the past history of problems with the thinkpad-
3094          *    acpi driver keymaps, and also that you will be
3095          *    listening to any bug reports;
3096          *
3097          * 3. Do not send thinkpad-acpi specific patches directly to
3098          *    for merging, *ever*.  Send them to the linux-acpi
3099          *    mailinglist for comments.  Merging is to be done only
3100          *    through acpi-test and the ACPI maintainer.
3101          *
3102          * If the above is too much to ask, don't change the keymap.
3103          * Ask the thinkpad-acpi maintainer to do it, instead.
3104          */
3105
3106         enum keymap_index {
3107                 TPACPI_KEYMAP_IBM_GENERIC = 0,
3108                 TPACPI_KEYMAP_LENOVO_GENERIC,
3109         };
3110
3111         static const tpacpi_keymap_t tpacpi_keymaps[] __initconst = {
3112         /* Generic keymap for IBM ThinkPads */
3113         [TPACPI_KEYMAP_IBM_GENERIC] = {
3114                 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
3115                 KEY_FN_F1,      KEY_BATTERY,    KEY_COFFEE,     KEY_SLEEP,
3116                 KEY_WLAN,       KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
3117                 KEY_FN_F9,      KEY_FN_F10,     KEY_FN_F11,     KEY_SUSPEND,
3118
3119                 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
3120                 KEY_UNKNOWN,    /* 0x0C: FN+BACKSPACE */
3121                 KEY_UNKNOWN,    /* 0x0D: FN+INSERT */
3122                 KEY_UNKNOWN,    /* 0x0E: FN+DELETE */
3123
3124                 /* brightness: firmware always reacts to them */
3125                 KEY_RESERVED,   /* 0x0F: FN+HOME (brightness up) */
3126                 KEY_RESERVED,   /* 0x10: FN+END (brightness down) */
3127
3128                 /* Thinklight: firmware always react to it */
3129                 KEY_RESERVED,   /* 0x11: FN+PGUP (thinklight toggle) */
3130
3131                 KEY_UNKNOWN,    /* 0x12: FN+PGDOWN */
3132                 KEY_ZOOM,       /* 0x13: FN+SPACE (zoom) */
3133
3134                 /* Volume: firmware always react to it and reprograms
3135                  * the built-in *extra* mixer.  Never map it to control
3136                  * another mixer by default. */
3137                 KEY_RESERVED,   /* 0x14: VOLUME UP */
3138                 KEY_RESERVED,   /* 0x15: VOLUME DOWN */
3139                 KEY_RESERVED,   /* 0x16: MUTE */
3140
3141                 KEY_VENDOR,     /* 0x17: Thinkpad/AccessIBM/Lenovo */
3142
3143                 /* (assignments unknown, please report if found) */
3144                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3145                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3146                 },
3147
3148         /* Generic keymap for Lenovo ThinkPads */
3149         [TPACPI_KEYMAP_LENOVO_GENERIC] = {
3150                 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
3151                 KEY_FN_F1,      KEY_COFFEE,     KEY_BATTERY,    KEY_SLEEP,
3152                 KEY_WLAN,       KEY_CAMERA, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
3153                 KEY_FN_F9,      KEY_FN_F10,     KEY_FN_F11,     KEY_SUSPEND,
3154
3155                 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
3156                 KEY_UNKNOWN,    /* 0x0C: FN+BACKSPACE */
3157                 KEY_UNKNOWN,    /* 0x0D: FN+INSERT */
3158                 KEY_UNKNOWN,    /* 0x0E: FN+DELETE */
3159
3160                 /* These should be enabled --only-- when ACPI video
3161                  * is disabled (i.e. in "vendor" mode), and are handled
3162                  * in a special way by the init code */
3163                 KEY_BRIGHTNESSUP,       /* 0x0F: FN+HOME (brightness up) */
3164                 KEY_BRIGHTNESSDOWN,     /* 0x10: FN+END (brightness down) */
3165
3166                 KEY_RESERVED,   /* 0x11: FN+PGUP (thinklight toggle) */
3167
3168                 KEY_UNKNOWN,    /* 0x12: FN+PGDOWN */
3169                 KEY_ZOOM,       /* 0x13: FN+SPACE (zoom) */
3170
3171                 /* Volume: z60/z61, T60 (BIOS version?): firmware always
3172                  * react to it and reprograms the built-in *extra* mixer.
3173                  * Never map it to control another mixer by default.
3174                  *
3175                  * T60?, T61, R60?, R61: firmware and EC tries to send
3176                  * these over the regular keyboard, so these are no-ops,
3177                  * but there are still weird bugs re. MUTE, so do not
3178                  * change unless you get test reports from all Lenovo
3179                  * models.  May cause the BIOS to interfere with the
3180                  * HDA mixer.
3181                  */
3182                 KEY_RESERVED,   /* 0x14: VOLUME UP */
3183                 KEY_RESERVED,   /* 0x15: VOLUME DOWN */
3184                 KEY_RESERVED,   /* 0x16: MUTE */
3185
3186                 KEY_VENDOR,     /* 0x17: Thinkpad/AccessIBM/Lenovo */
3187
3188                 /* (assignments unknown, please report if found) */
3189                 KEY_UNKNOWN, KEY_UNKNOWN,
3190
3191                 /*
3192                  * The mic mute button only sends 0x1a.  It does not
3193                  * automatically mute the mic or change the mute light.
3194                  */
3195                 KEY_MICMUTE,    /* 0x1a: Mic mute (since ?400 or so) */
3196
3197                 /* (assignments unknown, please report if found) */
3198                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3199                 KEY_UNKNOWN,
3200                 },
3201         };
3202
3203         static const struct tpacpi_quirk tpacpi_keymap_qtable[] __initconst = {
3204                 /* Generic maps (fallback) */
3205                 {
3206                   .vendor = PCI_VENDOR_ID_IBM,
3207                   .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY,
3208                   .quirks = TPACPI_KEYMAP_IBM_GENERIC,
3209                 },
3210                 {
3211                   .vendor = PCI_VENDOR_ID_LENOVO,
3212                   .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY,
3213                   .quirks = TPACPI_KEYMAP_LENOVO_GENERIC,
3214                 },
3215         };
3216
3217 #define TPACPI_HOTKEY_MAP_SIZE          sizeof(tpacpi_keymap_t)
3218 #define TPACPI_HOTKEY_MAP_TYPESIZE      sizeof(tpacpi_keymap_entry_t)
3219
3220         int res, i;
3221         int status;
3222         int hkeyv;
3223         bool radiosw_state  = false;
3224         bool tabletsw_state = false;
3225
3226         unsigned long quirks;
3227         unsigned long keymap_id;
3228
3229         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3230                         "initializing hotkey subdriver\n");
3231
3232         BUG_ON(!tpacpi_inputdev);
3233         BUG_ON(tpacpi_inputdev->open != NULL ||
3234                tpacpi_inputdev->close != NULL);
3235
3236         TPACPI_ACPIHANDLE_INIT(hkey);
3237         mutex_init(&hotkey_mutex);
3238
3239 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
3240         mutex_init(&hotkey_thread_mutex);
3241         mutex_init(&hotkey_thread_data_mutex);
3242 #endif
3243
3244         /* hotkey not supported on 570 */
3245         tp_features.hotkey = hkey_handle != NULL;
3246
3247         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3248                 "hotkeys are %s\n",
3249                 str_supported(tp_features.hotkey));
3250
3251         if (!tp_features.hotkey)
3252                 return 1;
3253
3254         quirks = tpacpi_check_quirks(tpacpi_hotkey_qtable,
3255                                      ARRAY_SIZE(tpacpi_hotkey_qtable));
3256
3257         tpacpi_disable_brightness_delay();
3258
3259         /* MUST have enough space for all attributes to be added to
3260          * hotkey_dev_attributes */
3261         hotkey_dev_attributes = create_attr_set(
3262                                         ARRAY_SIZE(hotkey_attributes) + 2,
3263                                         NULL);
3264         if (!hotkey_dev_attributes)
3265                 return -ENOMEM;
3266         res = add_many_to_attr_set(hotkey_dev_attributes,
3267                         hotkey_attributes,
3268                         ARRAY_SIZE(hotkey_attributes));
3269         if (res)
3270                 goto err_exit;
3271
3272         /* mask not supported on 600e/x, 770e, 770x, A21e, A2xm/p,
3273            A30, R30, R31, T20-22, X20-21, X22-24.  Detected by checking
3274            for HKEY interface version 0x100 */
3275         if (acpi_evalf(hkey_handle, &hkeyv, "MHKV", "qd")) {
3276                 if ((hkeyv >> 8) != 1) {
3277                         pr_err("unknown version of the HKEY interface: 0x%x\n",
3278                                hkeyv);
3279                         pr_err("please report this to %s\n", TPACPI_MAIL);
3280                 } else {
3281                         /*
3282                          * MHKV 0x100 in A31, R40, R40e,
3283                          * T4x, X31, and later
3284                          */
3285                         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3286                                 "firmware HKEY interface version: 0x%x\n",
3287                                 hkeyv);
3288
3289                         /* Paranoia check AND init hotkey_all_mask */
3290                         if (!acpi_evalf(hkey_handle, &hotkey_all_mask,
3291                                         "MHKA", "qd")) {
3292                                 pr_err("missing MHKA handler, "
3293                                        "please report this to %s\n",
3294                                        TPACPI_MAIL);
3295                                 /* Fallback: pre-init for FN+F3,F4,F12 */
3296                                 hotkey_all_mask = 0x080cU;
3297                         } else {
3298                                 tp_features.hotkey_mask = 1;
3299                         }
3300                 }
3301         }
3302
3303         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3304                 "hotkey masks are %s\n",
3305                 str_supported(tp_features.hotkey_mask));
3306
3307         /* Init hotkey_all_mask if not initialized yet */
3308         if (!tp_features.hotkey_mask && !hotkey_all_mask &&
3309             (quirks & TPACPI_HK_Q_INIMASK))
3310                 hotkey_all_mask = 0x080cU;  /* FN+F12, FN+F4, FN+F3 */
3311
3312         /* Init hotkey_acpi_mask and hotkey_orig_mask */
3313         if (tp_features.hotkey_mask) {
3314                 /* hotkey_source_mask *must* be zero for
3315                  * the first hotkey_mask_get to return hotkey_orig_mask */
3316                 res = hotkey_mask_get();
3317                 if (res)
3318                         goto err_exit;
3319
3320                 hotkey_orig_mask = hotkey_acpi_mask;
3321         } else {
3322                 hotkey_orig_mask = hotkey_all_mask;
3323                 hotkey_acpi_mask = hotkey_all_mask;
3324         }
3325
3326 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3327         if (dbg_wlswemul) {
3328                 tp_features.hotkey_wlsw = 1;
3329                 radiosw_state = !!tpacpi_wlsw_emulstate;
3330                 pr_info("radio switch emulation enabled\n");
3331         } else
3332 #endif
3333         /* Not all thinkpads have a hardware radio switch */
3334         if (acpi_evalf(hkey_handle, &status, "WLSW", "qd")) {
3335                 tp_features.hotkey_wlsw = 1;
3336                 radiosw_state = !!status;
3337                 pr_info("radio switch found; radios are %s\n",
3338                         enabled(status, 0));
3339         }
3340         if (tp_features.hotkey_wlsw)
3341                 res = add_to_attr_set(hotkey_dev_attributes,
3342                                 &dev_attr_hotkey_radio_sw.attr);
3343
3344         /* For X41t, X60t, X61t Tablets... */
3345         if (!res && acpi_evalf(hkey_handle, &status, "MHKG", "qd")) {
3346                 tp_features.hotkey_tablet = 1;
3347                 tabletsw_state = !!(status & TP_HOTKEY_TABLET_MASK);
3348                 pr_info("possible tablet mode switch found; "
3349                         "ThinkPad in %s mode\n",
3350                         (tabletsw_state) ? "tablet" : "laptop");
3351                 res = add_to_attr_set(hotkey_dev_attributes,
3352                                 &dev_attr_hotkey_tablet_mode.attr);
3353         }
3354
3355         if (!res)
3356                 res = register_attr_set_with_sysfs(
3357                                 hotkey_dev_attributes,
3358                                 &tpacpi_pdev->dev.kobj);
3359         if (res)
3360                 goto err_exit;
3361
3362         /* Set up key map */
3363         hotkey_keycode_map = kmalloc(TPACPI_HOTKEY_MAP_SIZE,
3364                                         GFP_KERNEL);
3365         if (!hotkey_keycode_map) {
3366                 pr_err("failed to allocate memory for key map\n");
3367                 res = -ENOMEM;
3368                 goto err_exit;
3369         }
3370
3371         keymap_id = tpacpi_check_quirks(tpacpi_keymap_qtable,
3372                                         ARRAY_SIZE(tpacpi_keymap_qtable));
3373         BUG_ON(keymap_id >= ARRAY_SIZE(tpacpi_keymaps));
3374         dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3375                    "using keymap number %lu\n", keymap_id);
3376
3377         memcpy(hotkey_keycode_map, &tpacpi_keymaps[keymap_id],
3378                 TPACPI_HOTKEY_MAP_SIZE);
3379
3380         input_set_capability(tpacpi_inputdev, EV_MSC, MSC_SCAN);
3381         tpacpi_inputdev->keycodesize = TPACPI_HOTKEY_MAP_TYPESIZE;
3382         tpacpi_inputdev->keycodemax = TPACPI_HOTKEY_MAP_LEN;
3383         tpacpi_inputdev->keycode = hotkey_keycode_map;
3384         for (i = 0; i < TPACPI_HOTKEY_MAP_LEN; i++) {
3385                 if (hotkey_keycode_map[i] != KEY_RESERVED) {
3386                         input_set_capability(tpacpi_inputdev, EV_KEY,
3387                                                 hotkey_keycode_map[i]);
3388                 } else {
3389                         if (i < sizeof(hotkey_reserved_mask)*8)
3390                                 hotkey_reserved_mask |= 1 << i;
3391                 }
3392         }
3393
3394         if (tp_features.hotkey_wlsw) {
3395                 input_set_capability(tpacpi_inputdev, EV_SW, SW_RFKILL_ALL);
3396                 input_report_switch(tpacpi_inputdev,
3397                                     SW_RFKILL_ALL, radiosw_state);
3398         }
3399         if (tp_features.hotkey_tablet) {
3400                 input_set_capability(tpacpi_inputdev, EV_SW, SW_TABLET_MODE);
3401                 input_report_switch(tpacpi_inputdev,
3402                                     SW_TABLET_MODE, tabletsw_state);
3403         }
3404
3405         /* Do not issue duplicate brightness change events to
3406          * userspace. tpacpi_detect_brightness_capabilities() must have
3407          * been called before this point  */
3408         if (tp_features.bright_acpimode && acpi_video_backlight_support()) {
3409                 pr_info("This ThinkPad has standard ACPI backlight "
3410                         "brightness control, supported by the ACPI "
3411                         "video driver\n");
3412                 pr_notice("Disabling thinkpad-acpi brightness events "
3413                           "by default...\n");
3414
3415                 /* Disable brightness up/down on Lenovo thinkpads when
3416                  * ACPI is handling them, otherwise it is plain impossible
3417                  * for userspace to do something even remotely sane */
3418                 hotkey_reserved_mask |=
3419                         (1 << TP_ACPI_HOTKEYSCAN_FNHOME)
3420                         | (1 << TP_ACPI_HOTKEYSCAN_FNEND);
3421                 hotkey_unmap(TP_ACPI_HOTKEYSCAN_FNHOME);
3422                 hotkey_unmap(TP_ACPI_HOTKEYSCAN_FNEND);
3423         }
3424
3425 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
3426         hotkey_source_mask = TPACPI_HKEY_NVRAM_GOOD_MASK
3427                                 & ~hotkey_all_mask
3428                                 & ~hotkey_reserved_mask;
3429
3430         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3431                     "hotkey source mask 0x%08x, polling freq %u\n",
3432                     hotkey_source_mask, hotkey_poll_freq);
3433 #endif
3434
3435         dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3436                         "enabling firmware HKEY event interface...\n");
3437         res = hotkey_status_set(true);
3438         if (res) {
3439                 hotkey_exit();
3440                 return res;
3441         }
3442         res = hotkey_mask_set(((hotkey_all_mask & ~hotkey_reserved_mask)
3443                                | hotkey_driver_mask)
3444                               & ~hotkey_source_mask);
3445         if (res < 0 && res != -ENXIO) {
3446                 hotkey_exit();
3447                 return res;
3448         }
3449         hotkey_user_mask = (hotkey_acpi_mask | hotkey_source_mask)
3450                                 & ~hotkey_reserved_mask;
3451         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3452                 "initial masks: user=0x%08x, fw=0x%08x, poll=0x%08x\n",
3453                 hotkey_user_mask, hotkey_acpi_mask, hotkey_source_mask);
3454
3455         dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3456                         "legacy ibm/hotkey event reporting over procfs %s\n",
3457                         (hotkey_report_mode < 2) ?
3458                                 "enabled" : "disabled");
3459
3460         tpacpi_inputdev->open = &hotkey_inputdev_open;
3461         tpacpi_inputdev->close = &hotkey_inputdev_close;
3462
3463         hotkey_poll_setup_safe(true);
3464
3465         return 0;
3466
3467 err_exit:
3468         delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
3469         hotkey_dev_attributes = NULL;
3470
3471         return (res < 0)? res : 1;
3472 }
3473
3474 static bool hotkey_notify_hotkey(const u32 hkey,
3475                                  bool *send_acpi_ev,
3476                                  bool *ignore_acpi_ev)
3477 {
3478         /* 0x1000-0x1FFF: key presses */
3479         unsigned int scancode = hkey & 0xfff;
3480         *send_acpi_ev = true;
3481         *ignore_acpi_ev = false;
3482
3483         /* HKEY event 0x1001 is scancode 0x00 */
3484         if (scancode > 0 && scancode <= TPACPI_HOTKEY_MAP_LEN) {
3485                 scancode--;
3486                 if (!(hotkey_source_mask & (1 << scancode))) {
3487                         tpacpi_input_send_key_masked(scancode);
3488                         *send_acpi_ev = false;
3489                 } else {
3490                         *ignore_acpi_ev = true;
3491                 }
3492                 return true;
3493         }
3494         return false;
3495 }
3496
3497 static bool hotkey_notify_wakeup(const u32 hkey,
3498                                  bool *send_acpi_ev,
3499                                  bool *ignore_acpi_ev)
3500 {
3501         /* 0x2000-0x2FFF: Wakeup reason */
3502         *send_acpi_ev = true;
3503         *ignore_acpi_ev = false;
3504
3505         switch (hkey) {
3506         case TP_HKEY_EV_WKUP_S3_UNDOCK: /* suspend, undock */
3507         case TP_HKEY_EV_WKUP_S4_UNDOCK: /* hibernation, undock */
3508                 hotkey_wakeup_reason = TP_ACPI_WAKEUP_UNDOCK;
3509                 *ignore_acpi_ev = true;
3510                 break;
3511
3512         case TP_HKEY_EV_WKUP_S3_BAYEJ: /* suspend, bay eject */
3513         case TP_HKEY_EV_WKUP_S4_BAYEJ: /* hibernation, bay eject */
3514                 hotkey_wakeup_reason = TP_ACPI_WAKEUP_BAYEJ;
3515                 *ignore_acpi_ev = true;
3516                 break;
3517
3518         case TP_HKEY_EV_WKUP_S3_BATLOW: /* Battery on critical low level/S3 */
3519         case TP_HKEY_EV_WKUP_S4_BATLOW: /* Battery on critical low level/S4 */
3520                 pr_alert("EMERGENCY WAKEUP: battery almost empty\n");
3521                 /* how to auto-heal: */
3522                 /* 2313: woke up from S3, go to S4/S5 */
3523                 /* 2413: woke up from S4, go to S5 */
3524                 break;
3525
3526         default:
3527                 return false;
3528         }
3529
3530         if (hotkey_wakeup_reason != TP_ACPI_WAKEUP_NONE) {
3531                 pr_info("woke up due to a hot-unplug request...\n");
3532                 hotkey_wakeup_reason_notify_change();
3533         }
3534         return true;
3535 }
3536
3537 static bool hotkey_notify_dockevent(const u32 hkey,
3538                                  bool *send_acpi_ev,
3539                                  bool *ignore_acpi_ev)
3540 {
3541         /* 0x4000-0x4FFF: dock-related events */
3542         *send_acpi_ev = true;
3543         *ignore_acpi_ev = false;
3544
3545         switch (hkey) {
3546         case TP_HKEY_EV_UNDOCK_ACK:
3547                 /* ACPI undock operation completed after wakeup */
3548                 hotkey_autosleep_ack = 1;
3549                 pr_info("undocked\n");
3550                 hotkey_wakeup_hotunplug_complete_notify_change();
3551                 return true;
3552
3553         case TP_HKEY_EV_HOTPLUG_DOCK: /* docked to port replicator */
3554                 pr_info("docked into hotplug port replicator\n");
3555                 return true;
3556         case TP_HKEY_EV_HOTPLUG_UNDOCK: /* undocked from port replicator */
3557                 pr_info("undocked from hotplug port replicator\n");
3558                 return true;
3559
3560         default:
3561                 return false;
3562         }
3563 }
3564
3565 static bool hotkey_notify_usrevent(const u32 hkey,
3566                                  bool *send_acpi_ev,
3567                                  bool *ignore_acpi_ev)
3568 {
3569         /* 0x5000-0x5FFF: human interface helpers */
3570         *send_acpi_ev = true;
3571         *ignore_acpi_ev = false;
3572
3573         switch (hkey) {
3574         case TP_HKEY_EV_PEN_INSERTED:  /* X61t: tablet pen inserted into bay */
3575         case TP_HKEY_EV_PEN_REMOVED:   /* X61t: tablet pen removed from bay */
3576                 return true;
3577
3578         case TP_HKEY_EV_TABLET_TABLET:   /* X41t-X61t: tablet mode */
3579         case TP_HKEY_EV_TABLET_NOTEBOOK: /* X41t-X61t: normal mode */
3580                 tpacpi_input_send_tabletsw();
3581                 hotkey_tablet_mode_notify_change();
3582                 *send_acpi_ev = false;
3583                 return true;
3584
3585         case TP_HKEY_EV_LID_CLOSE:      /* Lid closed */
3586         case TP_HKEY_EV_LID_OPEN:       /* Lid opened */
3587         case TP_HKEY_EV_BRGHT_CHANGED:  /* brightness changed */
3588                 /* do not propagate these events */
3589                 *ignore_acpi_ev = true;
3590                 return true;
3591
3592         default:
3593                 return false;
3594         }
3595 }
3596
3597 static void thermal_dump_all_sensors(void);
3598
3599 static bool hotkey_notify_6xxx(const u32 hkey,
3600                                  bool *send_acpi_ev,
3601                                  bool *ignore_acpi_ev)
3602 {
3603         bool known = true;
3604
3605         /* 0x6000-0x6FFF: thermal alarms/notices and keyboard events */
3606         *send_acpi_ev = true;
3607         *ignore_acpi_ev = false;
3608
3609         switch (hkey) {
3610         case TP_HKEY_EV_THM_TABLE_CHANGED:
3611                 pr_info("EC reports that Thermal Table has changed\n");
3612                 /* recommended action: do nothing, we don't have
3613                  * Lenovo ATM information */
3614                 return true;
3615         case TP_HKEY_EV_ALARM_BAT_HOT:
3616                 pr_crit("THERMAL ALARM: battery is too hot!\n");
3617                 /* recommended action: warn user through gui */
3618                 break;
3619         case TP_HKEY_EV_ALARM_BAT_XHOT:
3620                 pr_alert("THERMAL EMERGENCY: battery is extremely hot!\n");
3621                 /* recommended action: immediate sleep/hibernate */
3622                 break;
3623         case TP_HKEY_EV_ALARM_SENSOR_HOT:
3624                 pr_crit("THERMAL ALARM: "
3625                         "a sensor reports something is too hot!\n");
3626                 /* recommended action: warn user through gui, that */
3627                 /* some internal component is too hot */
3628                 break;
3629         case TP_HKEY_EV_ALARM_SENSOR_XHOT:
3630                 pr_alert("THERMAL EMERGENCY: "
3631                          "a sensor reports something is extremely hot!\n");
3632                 /* recommended action: immediate sleep/hibernate */
3633                 break;
3634
3635         case TP_HKEY_EV_KEY_NUMLOCK:
3636         case TP_HKEY_EV_KEY_FN:
3637                 /* key press events, we just ignore them as long as the EC
3638                  * is still reporting them in the normal keyboard stream */
3639                 *send_acpi_ev = false;
3640                 *ignore_acpi_ev = true;
3641                 return true;
3642
3643         default:
3644                 pr_warn("unknown possible thermal alarm or keyboard event received\n");
3645                 known = false;
3646         }
3647
3648         thermal_dump_all_sensors();
3649
3650         return known;
3651 }
3652
3653 static void hotkey_notify(struct ibm_struct *ibm, u32 event)
3654 {
3655         u32 hkey;
3656         bool send_acpi_ev;
3657         bool ignore_acpi_ev;
3658         bool known_ev;
3659
3660         if (event != 0x80) {
3661                 pr_err("unknown HKEY notification event %d\n", event);
3662                 /* forward it to userspace, maybe it knows how to handle it */
3663                 acpi_bus_generate_netlink_event(
3664                                         ibm->acpi->device->pnp.device_class,
3665                                         dev_name(&ibm->acpi->device->dev),
3666                                         event, 0);
3667                 return;
3668         }
3669
3670         while (1) {
3671                 if (!acpi_evalf(hkey_handle, &hkey, "MHKP", "d")) {
3672                         pr_err("failed to retrieve HKEY event\n");
3673                         return;
3674                 }
3675
3676                 if (hkey == 0) {
3677                         /* queue empty */
3678                         return;
3679                 }
3680
3681                 send_acpi_ev = true;
3682                 ignore_acpi_ev = false;
3683
3684                 switch (hkey >> 12) {
3685                 case 1:
3686                         /* 0x1000-0x1FFF: key presses */
3687                         known_ev = hotkey_notify_hotkey(hkey, &send_acpi_ev,
3688                                                  &ignore_acpi_ev);
3689                         break;
3690                 case 2:
3691                         /* 0x2000-0x2FFF: Wakeup reason */
3692                         known_ev = hotkey_notify_wakeup(hkey, &send_acpi_ev,
3693                                                  &ignore_acpi_ev);
3694                         break;
3695                 case 3:
3696                         /* 0x3000-0x3FFF: bay-related wakeups */
3697                         switch (hkey) {
3698                         case TP_HKEY_EV_BAYEJ_ACK:
3699                                 hotkey_autosleep_ack = 1;
3700                                 pr_info("bay ejected\n");
3701                                 hotkey_wakeup_hotunplug_complete_notify_change();
3702                                 known_ev = true;
3703                                 break;
3704                         case TP_HKEY_EV_OPTDRV_EJ:
3705                                 /* FIXME: kick libata if SATA link offline */
3706                                 known_ev = true;
3707                                 break;
3708                         default:
3709                                 known_ev = false;
3710                         }
3711                         break;
3712                 case 4:
3713                         /* 0x4000-0x4FFF: dock-related events */
3714                         known_ev = hotkey_notify_dockevent(hkey, &send_acpi_ev,
3715                                                 &ignore_acpi_ev);
3716                         break;
3717                 case 5:
3718                         /* 0x5000-0x5FFF: human interface helpers */
3719                         known_ev = hotkey_notify_usrevent(hkey, &send_acpi_ev,
3720                                                  &ignore_acpi_ev);
3721                         break;
3722                 case 6:
3723                         /* 0x6000-0x6FFF: thermal alarms/notices and
3724                          *                keyboard events */
3725                         known_ev = hotkey_notify_6xxx(hkey, &send_acpi_ev,
3726                                                  &ignore_acpi_ev);
3727                         break;
3728                 case 7:
3729                         /* 0x7000-0x7FFF: misc */
3730                         if (tp_features.hotkey_wlsw &&
3731                                         hkey == TP_HKEY_EV_RFKILL_CHANGED) {
3732                                 tpacpi_send_radiosw_update();
3733                                 send_acpi_ev = 0;
3734                                 known_ev = true;
3735                                 break;
3736                         }
3737                         /* fallthrough to default */
3738                 default:
3739                         known_ev = false;
3740                 }
3741                 if (!known_ev) {
3742                         pr_notice("unhandled HKEY event 0x%04x\n", hkey);
3743                         pr_notice("please report the conditions when this "
3744                                   "event happened to %s\n", TPACPI_MAIL);
3745                 }
3746
3747                 /* Legacy events */
3748                 if (!ignore_acpi_ev &&
3749                     (send_acpi_ev || hotkey_report_mode < 2)) {
3750                         acpi_bus_generate_proc_event(ibm->acpi->device,
3751                                                      event, hkey);
3752                 }
3753
3754                 /* netlink events */
3755                 if (!ignore_acpi_ev && send_acpi_ev) {
3756                         acpi_bus_generate_netlink_event(
3757                                         ibm->acpi->device->pnp.device_class,
3758                                         dev_name(&ibm->acpi->device->dev),
3759                                         event, hkey);
3760                 }
3761         }
3762 }
3763
3764 static void hotkey_suspend(pm_message_t state)
3765 {
3766         /* Do these on suspend, we get the events on early resume! */
3767         hotkey_wakeup_reason = TP_ACPI_WAKEUP_NONE;
3768         hotkey_autosleep_ack = 0;
3769 }
3770
3771 static void hotkey_resume(void)
3772 {
3773         tpacpi_disable_brightness_delay();
3774
3775         if (hotkey_status_set(true) < 0 ||
3776             hotkey_mask_set(hotkey_acpi_mask) < 0)
3777                 pr_err("error while attempting to reset the event "
3778                        "firmware interface\n");
3779
3780         tpacpi_send_radiosw_update();
3781         hotkey_tablet_mode_notify_change();
3782         hotkey_wakeup_reason_notify_change();
3783         hotkey_wakeup_hotunplug_complete_notify_change();
3784         hotkey_poll_setup_safe(false);
3785 }
3786
3787 /* procfs -------------------------------------------------------------- */
3788 static int hotkey_read(struct seq_file *m)
3789 {
3790         int res, status;
3791
3792         if (!tp_features.hotkey) {
3793                 seq_printf(m, "status:\t\tnot supported\n");
3794                 return 0;
3795         }
3796
3797         if (mutex_lock_killable(&hotkey_mutex))
3798                 return -ERESTARTSYS;
3799         res = hotkey_status_get(&status);
3800         if (!res)
3801                 res = hotkey_mask_get();
3802         mutex_unlock(&hotkey_mutex);
3803         if (res)
3804                 return res;
3805
3806         seq_printf(m, "status:\t\t%s\n", enabled(status, 0));
3807         if (hotkey_all_mask) {
3808                 seq_printf(m, "mask:\t\t0x%08x\n", hotkey_user_mask);
3809                 seq_printf(m, "commands:\tenable, disable, reset, <mask>\n");
3810         } else {
3811                 seq_printf(m, "mask:\t\tnot supported\n");
3812                 seq_printf(m, "commands:\tenable, disable, reset\n");
3813         }
3814
3815         return 0;
3816 }
3817
3818 static void hotkey_enabledisable_warn(bool enable)
3819 {
3820         tpacpi_log_usertask("procfs hotkey enable/disable");
3821         if (!WARN((tpacpi_lifecycle == TPACPI_LIFE_RUNNING || !enable),
3822                   pr_fmt("hotkey enable/disable functionality has been "
3823                          "removed from the driver.  "
3824                          "Hotkeys are always enabled.\n")))
3825                 pr_err("Please remove the hotkey=enable module "
3826                        "parameter, it is deprecated.  "
3827                        "Hotkeys are always enabled.\n");
3828 }
3829
3830 static int hotkey_write(char *buf)
3831 {
3832         int res;
3833         u32 mask;
3834         char *cmd;
3835
3836         if (!tp_features.hotkey)
3837                 return -ENODEV;
3838
3839         if (mutex_lock_killable(&hotkey_mutex))
3840                 return -ERESTARTSYS;
3841
3842         mask = hotkey_user_mask;
3843
3844         res = 0;
3845         while ((cmd = next_cmd(&buf))) {
3846                 if (strlencmp(cmd, "enable") == 0) {
3847                         hotkey_enabledisable_warn(1);
3848                 } else if (strlencmp(cmd, "disable") == 0) {
3849                         hotkey_enabledisable_warn(0);
3850                         res = -EPERM;
3851                 } else if (strlencmp(cmd, "reset") == 0) {
3852                         mask = (hotkey_all_mask | hotkey_source_mask)
3853                                 & ~hotkey_reserved_mask;
3854                 } else if (sscanf(cmd, "0x%x", &mask) == 1) {
3855                         /* mask set */
3856                 } else if (sscanf(cmd, "%x", &mask) == 1) {
3857                         /* mask set */
3858                 } else {
3859                         res = -EINVAL;
3860                         goto errexit;
3861                 }
3862         }
3863
3864         if (!res) {
3865                 tpacpi_disclose_usertask("procfs hotkey",
3866                         "set mask to 0x%08x\n", mask);
3867                 res = hotkey_user_mask_set(mask);
3868         }
3869
3870 errexit:
3871         mutex_unlock(&hotkey_mutex);
3872         return res;
3873 }
3874
3875 static const struct acpi_device_id ibm_htk_device_ids[] = {
3876         {TPACPI_ACPI_IBM_HKEY_HID, 0},
3877         {TPACPI_ACPI_LENOVO_HKEY_HID, 0},
3878         {"", 0},
3879 };
3880
3881 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver = {
3882         .hid = ibm_htk_device_ids,
3883         .notify = hotkey_notify,
3884         .handle = &hkey_handle,
3885         .type = ACPI_DEVICE_NOTIFY,
3886 };
3887
3888 static struct ibm_struct hotkey_driver_data = {
3889         .name = "hotkey",
3890         .read = hotkey_read,
3891         .write = hotkey_write,
3892         .exit = hotkey_exit,
3893         .resume = hotkey_resume,
3894         .suspend = hotkey_suspend,
3895         .acpi = &ibm_hotkey_acpidriver,
3896 };
3897
3898 /*************************************************************************
3899  * Bluetooth subdriver
3900  */
3901
3902 enum {
3903         /* ACPI GBDC/SBDC bits */
3904         TP_ACPI_BLUETOOTH_HWPRESENT     = 0x01, /* Bluetooth hw available */
3905         TP_ACPI_BLUETOOTH_RADIOSSW      = 0x02, /* Bluetooth radio enabled */
3906         TP_ACPI_BLUETOOTH_RESUMECTRL    = 0x04, /* Bluetooth state at resume:
3907                                                    0 = disable, 1 = enable */
3908 };
3909
3910 enum {
3911         /* ACPI \BLTH commands */
3912         TP_ACPI_BLTH_GET_ULTRAPORT_ID   = 0x00, /* Get Ultraport BT ID */
3913         TP_ACPI_BLTH_GET_PWR_ON_RESUME  = 0x01, /* Get power-on-resume state */
3914         TP_ACPI_BLTH_PWR_ON_ON_RESUME   = 0x02, /* Resume powered on */
3915         TP_ACPI_BLTH_PWR_OFF_ON_RESUME  = 0x03, /* Resume powered off */
3916         TP_ACPI_BLTH_SAVE_STATE         = 0x05, /* Save state for S4/S5 */
3917 };
3918
3919 #define TPACPI_RFK_BLUETOOTH_SW_NAME    "tpacpi_bluetooth_sw"
3920
3921 static int bluetooth_get_status(void)
3922 {
3923         int status;
3924
3925 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3926         if (dbg_bluetoothemul)
3927                 return (tpacpi_bluetooth_emulstate) ?
3928                        TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
3929 #endif
3930
3931         if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
3932                 return -EIO;
3933
3934         return ((status & TP_ACPI_BLUETOOTH_RADIOSSW) != 0) ?
3935                         TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
3936 }
3937
3938 static int bluetooth_set_status(enum tpacpi_rfkill_state state)
3939 {
3940         int status;
3941
3942         vdbg_printk(TPACPI_DBG_RFKILL,
3943                 "will attempt to %s bluetooth\n",
3944                 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable");
3945
3946 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3947         if (dbg_bluetoothemul) {
3948                 tpacpi_bluetooth_emulstate = (state == TPACPI_RFK_RADIO_ON);
3949                 return 0;
3950         }
3951 #endif
3952
3953         if (state == TPACPI_RFK_RADIO_ON)
3954                 status = TP_ACPI_BLUETOOTH_RADIOSSW
3955                           | TP_ACPI_BLUETOOTH_RESUMECTRL;
3956         else
3957                 status = 0;
3958
3959         if (!acpi_evalf(hkey_handle, NULL, "SBDC", "vd", status))
3960                 return -EIO;
3961
3962         return 0;
3963 }
3964
3965 /* sysfs bluetooth enable ---------------------------------------------- */
3966 static ssize_t bluetooth_enable_show(struct device *dev,
3967                            struct device_attribute *attr,
3968                            char *buf)
3969 {
3970         return tpacpi_rfk_sysfs_enable_show(TPACPI_RFK_BLUETOOTH_SW_ID,
3971                         attr, buf);
3972 }
3973
3974 static ssize_t bluetooth_enable_store(struct device *dev,
3975                             struct device_attribute *attr,
3976                             const char *buf, size_t count)
3977 {
3978         return tpacpi_rfk_sysfs_enable_store(TPACPI_RFK_BLUETOOTH_SW_ID,
3979                                 attr, buf, count);
3980 }
3981
3982 static struct device_attribute dev_attr_bluetooth_enable =
3983         __ATTR(bluetooth_enable, S_IWUSR | S_IRUGO,
3984                 bluetooth_enable_show, bluetooth_enable_store);
3985
3986 /* --------------------------------------------------------------------- */
3987
3988 static struct attribute *bluetooth_attributes[] = {
3989         &dev_attr_bluetooth_enable.attr,
3990         NULL
3991 };
3992
3993 static const struct attribute_group bluetooth_attr_group = {
3994         .attrs = bluetooth_attributes,
3995 };
3996
3997 static const struct tpacpi_rfk_ops bluetooth_tprfk_ops = {
3998         .get_status = bluetooth_get_status,
3999         .set_status = bluetooth_set_status,
4000 };
4001
4002 static void bluetooth_shutdown(void)
4003 {
4004         /* Order firmware to save current state to NVRAM */
4005         if (!acpi_evalf(NULL, NULL, "\\BLTH", "vd",
4006                         TP_ACPI_BLTH_SAVE_STATE))
4007                 pr_notice("failed to save bluetooth state to NVRAM\n");
4008         else
4009                 vdbg_printk(TPACPI_DBG_RFKILL,
4010                         "bluetooth state saved to NVRAM\n");
4011 }
4012
4013 static void bluetooth_exit(void)
4014 {
4015         sysfs_remove_group(&tpacpi_pdev->dev.kobj,
4016                         &bluetooth_attr_group);
4017
4018         tpacpi_destroy_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID);
4019
4020         bluetooth_shutdown();
4021 }
4022
4023 static int __init bluetooth_init(struct ibm_init_struct *iibm)
4024 {
4025         int res;
4026         int status = 0;
4027
4028         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4029                         "initializing bluetooth subdriver\n");
4030
4031         TPACPI_ACPIHANDLE_INIT(hkey);
4032
4033         /* bluetooth not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
4034            G4x, R30, R31, R40e, R50e, T20-22, X20-21 */
4035         tp_features.bluetooth = hkey_handle &&
4036             acpi_evalf(hkey_handle, &status, "GBDC", "qd");
4037
4038         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4039                 "bluetooth is %s, status 0x%02x\n",
4040                 str_supported(tp_features.bluetooth),
4041                 status);
4042
4043 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4044         if (dbg_bluetoothemul) {
4045                 tp_features.bluetooth = 1;
4046                 pr_info("bluetooth switch emulation enabled\n");
4047         } else
4048 #endif
4049         if (tp_features.bluetooth &&
4050             !(status & TP_ACPI_BLUETOOTH_HWPRESENT)) {
4051                 /* no bluetooth hardware present in system */
4052                 tp_features.bluetooth = 0;
4053                 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4054                            "bluetooth hardware not installed\n");
4055         }
4056
4057         if (!tp_features.bluetooth)
4058                 return 1;
4059
4060         res = tpacpi_new_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID,
4061                                 &bluetooth_tprfk_ops,
4062                                 RFKILL_TYPE_BLUETOOTH,
4063                                 TPACPI_RFK_BLUETOOTH_SW_NAME,
4064                                 true);
4065         if (res)
4066                 return res;
4067
4068         res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
4069                                 &bluetooth_attr_group);
4070         if (res) {
4071                 tpacpi_destroy_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID);
4072                 return res;
4073         }
4074
4075         return 0;
4076 }
4077
4078 /* procfs -------------------------------------------------------------- */
4079 static int bluetooth_read(struct seq_file *m)
4080 {
4081         return tpacpi_rfk_procfs_read(TPACPI_RFK_BLUETOOTH_SW_ID, m);
4082 }
4083
4084 static int bluetooth_write(char *buf)
4085 {
4086         return tpacpi_rfk_procfs_write(TPACPI_RFK_BLUETOOTH_SW_ID, buf);
4087 }
4088
4089 static struct ibm_struct bluetooth_driver_data = {
4090         .name = "bluetooth",
4091         .read = bluetooth_read,
4092         .write = bluetooth_write,
4093         .exit = bluetooth_exit,
4094         .shutdown = bluetooth_shutdown,
4095 };
4096
4097 /*************************************************************************
4098  * Wan subdriver
4099  */
4100
4101 enum {
4102         /* ACPI GWAN/SWAN bits */
4103         TP_ACPI_WANCARD_HWPRESENT       = 0x01, /* Wan hw available */
4104         TP_ACPI_WANCARD_RADIOSSW        = 0x02, /* Wan radio enabled */
4105         TP_ACPI_WANCARD_RESUMECTRL      = 0x04, /* Wan state at resume:
4106                                                    0 = disable, 1 = enable */
4107 };
4108
4109 #define TPACPI_RFK_WWAN_SW_NAME         "tpacpi_wwan_sw"
4110
4111 static int wan_get_status(void)
4112 {
4113         int status;
4114
4115 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4116         if (dbg_wwanemul)
4117                 return (tpacpi_wwan_emulstate) ?
4118                        TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4119 #endif
4120
4121         if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
4122                 return -EIO;
4123
4124         return ((status & TP_ACPI_WANCARD_RADIOSSW) != 0) ?
4125                         TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4126 }
4127
4128 static int wan_set_status(enum tpacpi_rfkill_state state)
4129 {
4130         int status;
4131
4132         vdbg_printk(TPACPI_DBG_RFKILL,
4133                 "will attempt to %s wwan\n",
4134                 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable");
4135
4136 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4137         if (dbg_wwanemul) {
4138                 tpacpi_wwan_emulstate = (state == TPACPI_RFK_RADIO_ON);
4139                 return 0;
4140         }
4141 #endif
4142
4143         if (state == TPACPI_RFK_RADIO_ON)
4144                 status = TP_ACPI_WANCARD_RADIOSSW
4145                          | TP_ACPI_WANCARD_RESUMECTRL;
4146         else
4147                 status = 0;
4148
4149         if (!acpi_evalf(hkey_handle, NULL, "SWAN", "vd", status))
4150                 return -EIO;
4151
4152         return 0;
4153 }
4154
4155 /* sysfs wan enable ---------------------------------------------------- */
4156 static ssize_t wan_enable_show(struct device *dev,
4157                            struct device_attribute *attr,
4158                            char *buf)
4159 {
4160         return tpacpi_rfk_sysfs_enable_show(TPACPI_RFK_WWAN_SW_ID,
4161                         attr, buf);
4162 }
4163
4164 static ssize_t wan_enable_store(struct device *dev,
4165                             struct device_attribute *attr,
4166                             const char *buf, size_t count)
4167 {
4168         return tpacpi_rfk_sysfs_enable_store(TPACPI_RFK_WWAN_SW_ID,
4169                         attr, buf, count);
4170 }
4171
4172 static struct device_attribute dev_attr_wan_enable =
4173         __ATTR(wwan_enable, S_IWUSR | S_IRUGO,
4174                 wan_enable_show, wan_enable_store);
4175
4176 /* --------------------------------------------------------------------- */
4177
4178 static struct attribute *wan_attributes[] = {
4179         &dev_attr_wan_enable.attr,
4180         NULL
4181 };
4182
4183 static const struct attribute_group wan_attr_group = {
4184         .attrs = wan_attributes,
4185 };
4186
4187 static const struct tpacpi_rfk_ops wan_tprfk_ops = {
4188         .get_status = wan_get_status,
4189         .set_status = wan_set_status,
4190 };
4191
4192 static void wan_shutdown(void)
4193 {
4194         /* Order firmware to save current state to NVRAM */
4195         if (!acpi_evalf(NULL, NULL, "\\WGSV", "vd",
4196                         TP_ACPI_WGSV_SAVE_STATE))
4197                 pr_notice("failed to save WWAN state to NVRAM\n");
4198         else
4199                 vdbg_printk(TPACPI_DBG_RFKILL,
4200                         "WWAN state saved to NVRAM\n");
4201 }
4202
4203 static void wan_exit(void)
4204 {
4205         sysfs_remove_group(&tpacpi_pdev->dev.kobj,
4206                 &wan_attr_group);
4207
4208         tpacpi_destroy_rfkill(TPACPI_RFK_WWAN_SW_ID);
4209
4210         wan_shutdown();
4211 }
4212
4213 static int __init wan_init(struct ibm_init_struct *iibm)
4214 {
4215         int res;
4216         int status = 0;
4217
4218         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4219                         "initializing wan subdriver\n");
4220
4221         TPACPI_ACPIHANDLE_INIT(hkey);
4222
4223         tp_features.wan = hkey_handle &&
4224             acpi_evalf(hkey_handle, &status, "GWAN", "qd");
4225
4226         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4227                 "wan is %s, status 0x%02x\n",
4228                 str_supported(tp_features.wan),
4229                 status);
4230
4231 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4232         if (dbg_wwanemul) {
4233                 tp_features.wan = 1;
4234                 pr_info("wwan switch emulation enabled\n");
4235         } else
4236 #endif
4237         if (tp_features.wan &&
4238             !(status & TP_ACPI_WANCARD_HWPRESENT)) {
4239                 /* no wan hardware present in system */
4240                 tp_features.wan = 0;
4241                 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4242                            "wan hardware not installed\n");
4243         }
4244
4245         if (!tp_features.wan)
4246                 return 1;
4247
4248         res = tpacpi_new_rfkill(TPACPI_RFK_WWAN_SW_ID,
4249                                 &wan_tprfk_ops,
4250                                 RFKILL_TYPE_WWAN,
4251                                 TPACPI_RFK_WWAN_SW_NAME,
4252                                 true);
4253         if (res)
4254                 return res;
4255
4256         res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
4257                                 &wan_attr_group);
4258
4259         if (res) {
4260                 tpacpi_destroy_rfkill(TPACPI_RFK_WWAN_SW_ID);
4261                 return res;
4262         }
4263
4264         return 0;
4265 }
4266
4267 /* procfs -------------------------------------------------------------- */
4268 static int wan_read(struct seq_file *m)
4269 {
4270         return tpacpi_rfk_procfs_read(TPACPI_RFK_WWAN_SW_ID, m);
4271 }
4272
4273 static int wan_write(char *buf)
4274 {
4275         return tpacpi_rfk_procfs_write(TPACPI_RFK_WWAN_SW_ID, buf);
4276 }
4277
4278 static struct ibm_struct wan_driver_data = {
4279         .name = "wan",
4280         .read = wan_read,
4281         .write = wan_write,
4282         .exit = wan_exit,
4283         .shutdown = wan_shutdown,
4284 };
4285
4286 /*************************************************************************
4287  * UWB subdriver
4288  */
4289
4290 enum {
4291         /* ACPI GUWB/SUWB bits */
4292         TP_ACPI_UWB_HWPRESENT   = 0x01, /* UWB hw available */
4293         TP_ACPI_UWB_RADIOSSW    = 0x02, /* UWB radio enabled */
4294 };
4295
4296 #define TPACPI_RFK_UWB_SW_NAME  "tpacpi_uwb_sw"
4297
4298 static int uwb_get_status(void)
4299 {
4300         int status;
4301
4302 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4303         if (dbg_uwbemul)
4304                 return (tpacpi_uwb_emulstate) ?
4305                        TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4306 #endif
4307
4308         if (!acpi_evalf(hkey_handle, &status, "GUWB", "d"))
4309                 return -EIO;
4310
4311         return ((status & TP_ACPI_UWB_RADIOSSW) != 0) ?
4312                         TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4313 }
4314
4315 static int uwb_set_status(enum tpacpi_rfkill_state state)
4316 {
4317         int status;
4318
4319         vdbg_printk(TPACPI_DBG_RFKILL,
4320                 "will attempt to %s UWB\n",
4321                 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable");
4322
4323 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4324         if (dbg_uwbemul) {
4325                 tpacpi_uwb_emulstate = (state == TPACPI_RFK_RADIO_ON);
4326                 return 0;
4327         }
4328 #endif
4329
4330         if (state == TPACPI_RFK_RADIO_ON)
4331                 status = TP_ACPI_UWB_RADIOSSW;
4332         else
4333                 status = 0;
4334
4335         if (!acpi_evalf(hkey_handle, NULL, "SUWB", "vd", status))
4336                 return -EIO;
4337
4338         return 0;
4339 }
4340
4341 /* --------------------------------------------------------------------- */
4342
4343 static const struct tpacpi_rfk_ops uwb_tprfk_ops = {
4344         .get_status = uwb_get_status,
4345         .set_status = uwb_set_status,
4346 };
4347
4348 static void uwb_exit(void)
4349 {
4350         tpacpi_destroy_rfkill(TPACPI_RFK_UWB_SW_ID);
4351 }
4352
4353 static int __init uwb_init(struct ibm_init_struct *iibm)
4354 {
4355         int res;
4356         int status = 0;
4357
4358         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4359                         "initializing uwb subdriver\n");
4360
4361         TPACPI_ACPIHANDLE_INIT(hkey);
4362
4363         tp_features.uwb = hkey_handle &&
4364             acpi_evalf(hkey_handle, &status, "GUWB", "qd");
4365
4366         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4367                 "uwb is %s, status 0x%02x\n",
4368                 str_supported(tp_features.uwb),
4369                 status);
4370
4371 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4372         if (dbg_uwbemul) {
4373                 tp_features.uwb = 1;
4374                 pr_info("uwb switch emulation enabled\n");
4375         } else
4376 #endif
4377         if (tp_features.uwb &&
4378             !(status & TP_ACPI_UWB_HWPRESENT)) {
4379                 /* no uwb hardware present in system */
4380                 tp_features.uwb = 0;
4381                 dbg_printk(TPACPI_DBG_INIT,
4382                            "uwb hardware not installed\n");
4383         }
4384
4385         if (!tp_features.uwb)
4386                 return 1;
4387
4388         res = tpacpi_new_rfkill(TPACPI_RFK_UWB_SW_ID,
4389                                 &uwb_tprfk_ops,
4390                                 RFKILL_TYPE_UWB,
4391                                 TPACPI_RFK_UWB_SW_NAME,
4392                                 false);
4393         return res;
4394 }
4395
4396 static struct ibm_struct uwb_driver_data = {
4397         .name = "uwb",
4398         .exit = uwb_exit,
4399         .flags.experimental = 1,
4400 };
4401
4402 /*************************************************************************
4403  * Video subdriver
4404  */
4405
4406 #ifdef CONFIG_THINKPAD_ACPI_VIDEO
4407
4408 enum video_access_mode {
4409         TPACPI_VIDEO_NONE = 0,
4410         TPACPI_VIDEO_570,       /* 570 */
4411         TPACPI_VIDEO_770,       /* 600e/x, 770e, 770x */
4412         TPACPI_VIDEO_NEW,       /* all others */
4413 };
4414
4415 enum {  /* video status flags, based on VIDEO_570 */
4416         TP_ACPI_VIDEO_S_LCD = 0x01,     /* LCD output enabled */
4417         TP_ACPI_VIDEO_S_CRT = 0x02,     /* CRT output enabled */
4418         TP_ACPI_VIDEO_S_DVI = 0x08,     /* DVI output enabled */
4419 };
4420
4421 enum {  /* TPACPI_VIDEO_570 constants */
4422         TP_ACPI_VIDEO_570_PHSCMD = 0x87,        /* unknown magic constant :( */
4423         TP_ACPI_VIDEO_570_PHSMASK = 0x03,       /* PHS bits that map to
4424                                                  * video_status_flags */
4425         TP_ACPI_VIDEO_570_PHS2CMD = 0x8b,       /* unknown magic constant :( */
4426         TP_ACPI_VIDEO_570_PHS2SET = 0x80,       /* unknown magic constant :( */
4427 };
4428
4429 static enum video_access_mode video_supported;
4430 static int video_orig_autosw;
4431
4432 static int video_autosw_get(void);
4433 static int video_autosw_set(int enable);
4434
4435 TPACPI_HANDLE(vid, root,
4436               "\\_SB.PCI.AGP.VGA",      /* 570 */
4437               "\\_SB.PCI0.AGP0.VID0",   /* 600e/x, 770x */
4438               "\\_SB.PCI0.VID0",        /* 770e */
4439               "\\_SB.PCI0.VID",         /* A21e, G4x, R50e, X30, X40 */
4440               "\\_SB.PCI0.AGP.VGA",     /* X100e and a few others */
4441               "\\_SB.PCI0.AGP.VID",     /* all others */
4442         );                              /* R30, R31 */
4443
4444 TPACPI_HANDLE(vid2, root, "\\_SB.PCI0.AGPB.VID");       /* G41 */
4445
4446 static int __init video_init(struct ibm_init_struct *iibm)
4447 {
4448         int ivga;
4449
4450         vdbg_printk(TPACPI_DBG_INIT, "initializing video subdriver\n");
4451
4452         TPACPI_ACPIHANDLE_INIT(vid);
4453         if (tpacpi_is_ibm())
4454                 TPACPI_ACPIHANDLE_INIT(vid2);
4455
4456         if (vid2_handle && acpi_evalf(NULL, &ivga, "\\IVGA", "d") && ivga)
4457                 /* G41, assume IVGA doesn't change */
4458                 vid_handle = vid2_handle;
4459
4460         if (!vid_handle)
4461                 /* video switching not supported on R30, R31 */
4462                 video_supported = TPACPI_VIDEO_NONE;
4463         else if (tpacpi_is_ibm() &&
4464                  acpi_evalf(vid_handle, &video_orig_autosw, "SWIT", "qd"))
4465                 /* 570 */
4466                 video_supported = TPACPI_VIDEO_570;
4467         else if (tpacpi_is_ibm() &&
4468                  acpi_evalf(vid_handle, &video_orig_autosw, "^VADL", "qd"))
4469                 /* 600e/x, 770e, 770x */
4470                 video_supported = TPACPI_VIDEO_770;
4471         else
4472                 /* all others */
4473                 video_supported = TPACPI_VIDEO_NEW;
4474
4475         vdbg_printk(TPACPI_DBG_INIT, "video is %s, mode %d\n",
4476                 str_supported(video_supported != TPACPI_VIDEO_NONE),
4477                 video_supported);
4478
4479         return (video_supported != TPACPI_VIDEO_NONE)? 0 : 1;
4480 }
4481
4482 static void video_exit(void)
4483 {
4484         dbg_printk(TPACPI_DBG_EXIT,
4485                    "restoring original video autoswitch mode\n");
4486         if (video_autosw_set(video_orig_autosw))
4487                 pr_err("error while trying to restore original "
4488                         "video autoswitch mode\n");
4489 }
4490
4491 static int video_outputsw_get(void)
4492 {
4493         int status = 0;
4494         int i;
4495
4496         switch (video_supported) {
4497         case TPACPI_VIDEO_570:
4498                 if (!acpi_evalf(NULL, &i, "\\_SB.PHS", "dd",
4499                                  TP_ACPI_VIDEO_570_PHSCMD))
4500                         return -EIO;
4501                 status = i & TP_ACPI_VIDEO_570_PHSMASK;
4502                 break;
4503         case TPACPI_VIDEO_770:
4504                 if (!acpi_evalf(NULL, &i, "\\VCDL", "d"))
4505                         return -EIO;
4506                 if (i)
4507                         status |= TP_ACPI_VIDEO_S_LCD;
4508                 if (!acpi_evalf(NULL, &i, "\\VCDC", "d"))
4509                         return -EIO;
4510                 if (i)
4511                         status |= TP_ACPI_VIDEO_S_CRT;
4512                 break;
4513         case TPACPI_VIDEO_NEW:
4514                 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 1) ||
4515                     !acpi_evalf(NULL, &i, "\\VCDC", "d"))
4516                         return -EIO;
4517                 if (i)
4518                         status |= TP_ACPI_VIDEO_S_CRT;
4519
4520                 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0) ||
4521                     !acpi_evalf(NULL, &i, "\\VCDL", "d"))
4522                         return -EIO;
4523                 if (i)
4524                         status |= TP_ACPI_VIDEO_S_LCD;
4525                 if (!acpi_evalf(NULL, &i, "\\VCDD", "d"))
4526                         return -EIO;
4527                 if (i)
4528                         status |= TP_ACPI_VIDEO_S_DVI;
4529                 break;
4530         default:
4531                 return -ENOSYS;
4532         }
4533
4534         return status;
4535 }
4536
4537 static int video_outputsw_set(int status)
4538 {
4539         int autosw;
4540         int res = 0;
4541
4542         switch (video_supported) {
4543         case TPACPI_VIDEO_570:
4544                 res = acpi_evalf(NULL, NULL,
4545                                  "\\_SB.PHS2", "vdd",
4546                                  TP_ACPI_VIDEO_570_PHS2CMD,
4547                                  status | TP_ACPI_VIDEO_570_PHS2SET);
4548                 break;
4549         case TPACPI_VIDEO_770:
4550                 autosw = video_autosw_get();
4551                 if (autosw < 0)
4552                         return autosw;
4553
4554                 res = video_autosw_set(1);
4555                 if (res)
4556                         return res;
4557                 res = acpi_evalf(vid_handle, NULL,
4558                                  "ASWT", "vdd", status * 0x100, 0);
4559                 if (!autosw && video_autosw_set(autosw)) {
4560                         pr_err("video auto-switch left enabled due to error\n");
4561                         return -EIO;
4562                 }
4563                 break;
4564         case TPACPI_VIDEO_NEW:
4565                 res = acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0x80) &&
4566                       acpi_evalf(NULL, NULL, "\\VSDS", "vdd", status, 1);
4567                 break;
4568         default:
4569                 return -ENOSYS;
4570         }
4571
4572         return (res)? 0 : -EIO;
4573 }
4574
4575 static int video_autosw_get(void)
4576 {
4577         int autosw = 0;
4578
4579         switch (video_supported) {
4580         case TPACPI_VIDEO_570:
4581                 if (!acpi_evalf(vid_handle, &autosw, "SWIT", "d"))
4582                         return -EIO;
4583                 break;
4584         case TPACPI_VIDEO_770:
4585         case TPACPI_VIDEO_NEW:
4586                 if (!acpi_evalf(vid_handle, &autosw, "^VDEE", "d"))
4587                         return -EIO;
4588                 break;
4589         default:
4590                 return -ENOSYS;
4591         }
4592
4593         return autosw & 1;
4594 }
4595
4596 static int video_autosw_set(int enable)
4597 {
4598         if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", (enable)? 1 : 0))
4599                 return -EIO;
4600         return 0;
4601 }
4602
4603 static int video_outputsw_cycle(void)
4604 {
4605         int autosw = video_autosw_get();
4606         int res;
4607
4608         if (autosw < 0)
4609                 return autosw;
4610
4611         switch (video_supported) {
4612         case TPACPI_VIDEO_570:
4613                 res = video_autosw_set(1);
4614                 if (res)
4615                         return res;
4616                 res = acpi_evalf(ec_handle, NULL, "_Q16", "v");
4617                 break;
4618         case TPACPI_VIDEO_770:
4619         case TPACPI_VIDEO_NEW:
4620                 res = video_autosw_set(1);
4621                 if (res)
4622                         return res;
4623                 res = acpi_evalf(vid_handle, NULL, "VSWT", "v");
4624                 break;
4625         default:
4626                 return -ENOSYS;
4627         }
4628         if (!autosw && video_autosw_set(autosw)) {
4629                 pr_err("video auto-switch left enabled due to error\n");
4630                 return -EIO;
4631         }
4632
4633         return (res)? 0 : -EIO;
4634 }
4635
4636 static int video_expand_toggle(void)
4637 {
4638         switch (video_supported) {
4639         case TPACPI_VIDEO_570:
4640                 return acpi_evalf(ec_handle, NULL, "_Q17", "v")?
4641                         0 : -EIO;
4642         case TPACPI_VIDEO_770:
4643                 return acpi_evalf(vid_handle, NULL, "VEXP", "v")?
4644                         0 : -EIO;
4645         case TPACPI_VIDEO_NEW:
4646                 return acpi_evalf(NULL, NULL, "\\VEXP", "v")?
4647                         0 : -EIO;
4648         default:
4649                 return -ENOSYS;
4650         }
4651         /* not reached */
4652 }
4653
4654 static int video_read(struct seq_file *m)
4655 {
4656         int status, autosw;
4657
4658         if (video_supported == TPACPI_VIDEO_NONE) {
4659                 seq_printf(m, "status:\t\tnot supported\n");
4660                 return 0;
4661         }
4662
4663         /* Even reads can crash X.org, so... */
4664         if (!capable(CAP_SYS_ADMIN))
4665                 return -EPERM;
4666
4667         status = video_outputsw_get();
4668         if (status < 0)
4669                 return status;
4670
4671         autosw = video_autosw_get();
4672         if (autosw < 0)
4673                 return autosw;
4674
4675         seq_printf(m, "status:\t\tsupported\n");
4676         seq_printf(m, "lcd:\t\t%s\n", enabled(status, 0));
4677         seq_printf(m, "crt:\t\t%s\n", enabled(status, 1));
4678         if (video_supported == TPACPI_VIDEO_NEW)
4679                 seq_printf(m, "dvi:\t\t%s\n", enabled(status, 3));
4680         seq_printf(m, "auto:\t\t%s\n", enabled(autosw, 0));
4681         seq_printf(m, "commands:\tlcd_enable, lcd_disable\n");
4682         seq_printf(m, "commands:\tcrt_enable, crt_disable\n");
4683         if (video_supported == TPACPI_VIDEO_NEW)
4684                 seq_printf(m, "commands:\tdvi_enable, dvi_disable\n");
4685         seq_printf(m, "commands:\tauto_enable, auto_disable\n");
4686         seq_printf(m, "commands:\tvideo_switch, expand_toggle\n");
4687
4688         return 0;
4689 }
4690
4691 static int video_write(char *buf)
4692 {
4693         char *cmd;
4694         int enable, disable, status;
4695         int res;
4696
4697         if (video_supported == TPACPI_VIDEO_NONE)
4698                 return -ENODEV;
4699
4700         /* Even reads can crash X.org, let alone writes... */
4701         if (!capable(CAP_SYS_ADMIN))
4702                 return -EPERM;
4703
4704         enable = 0;
4705         disable = 0;
4706
4707         while ((cmd = next_cmd(&buf))) {
4708                 if (strlencmp(cmd, "lcd_enable") == 0) {
4709                         enable |= TP_ACPI_VIDEO_S_LCD;
4710                 } else if (strlencmp(cmd, "lcd_disable") == 0) {
4711                         disable |= TP_ACPI_VIDEO_S_LCD;
4712                 } else if (strlencmp(cmd, "crt_enable") == 0) {
4713                         enable |= TP_ACPI_VIDEO_S_CRT;
4714                 } else if (strlencmp(cmd, "crt_disable") == 0) {
4715                         disable |= TP_ACPI_VIDEO_S_CRT;
4716                 } else if (video_supported == TPACPI_VIDEO_NEW &&
4717                            strlencmp(cmd, "dvi_enable") == 0) {
4718                         enable |= TP_ACPI_VIDEO_S_DVI;
4719                 } else if (video_supported == TPACPI_VIDEO_NEW &&
4720                            strlencmp(cmd, "dvi_disable") == 0) {
4721                         disable |= TP_ACPI_VIDEO_S_DVI;
4722                 } else if (strlencmp(cmd, "auto_enable") == 0) {
4723                         res = video_autosw_set(1);
4724                         if (res)
4725                                 return res;
4726                 } else if (strlencmp(cmd, "auto_disable") == 0) {
4727                         res = video_autosw_set(0);
4728                         if (res)
4729                                 return res;
4730                 } else if (strlencmp(cmd, "video_switch") == 0) {
4731                         res = video_outputsw_cycle();
4732                         if (res)
4733                                 return res;
4734                 } else if (strlencmp(cmd, "expand_toggle") == 0) {
4735                         res = video_expand_toggle();
4736                         if (res)
4737                                 return res;
4738                 } else
4739                         return -EINVAL;
4740         }
4741
4742         if (enable || disable) {
4743                 status = video_outputsw_get();
4744                 if (status < 0)
4745                         return status;
4746                 res = video_outputsw_set((status & ~disable) | enable);
4747                 if (res)
4748                         return res;
4749         }
4750
4751         return 0;
4752 }
4753
4754 static struct ibm_struct video_driver_data = {
4755         .name = "video",
4756         .read = video_read,
4757         .write = video_write,
4758         .exit = video_exit,
4759 };
4760
4761 #endif /* CONFIG_THINKPAD_ACPI_VIDEO */
4762
4763 /*************************************************************************
4764  * Light (thinklight) subdriver
4765  */
4766
4767 TPACPI_HANDLE(lght, root, "\\LGHT");    /* A21e, A2xm/p, T20-22, X20-21 */
4768 TPACPI_HANDLE(ledb, ec, "LEDB");                /* G4x */
4769
4770 static int light_get_status(void)
4771 {
4772         int status = 0;
4773
4774         if (tp_features.light_status) {
4775                 if (!acpi_evalf(ec_handle, &status, "KBLT", "d"))
4776                         return -EIO;
4777                 return (!!status);
4778         }
4779
4780         return -ENXIO;
4781 }
4782
4783 static int light_set_status(int status)
4784 {
4785         int rc;
4786
4787         if (tp_features.light) {
4788                 if (cmos_handle) {
4789                         rc = acpi_evalf(cmos_handle, NULL, NULL, "vd",
4790                                         (status)?
4791                                                 TP_CMOS_THINKLIGHT_ON :
4792                                                 TP_CMOS_THINKLIGHT_OFF);
4793                 } else {
4794                         rc = acpi_evalf(lght_handle, NULL, NULL, "vd",
4795                                         (status)? 1 : 0);
4796                 }
4797                 return (rc)? 0 : -EIO;
4798         }
4799
4800         return -ENXIO;
4801 }
4802
4803 static void light_set_status_worker(struct work_struct *work)
4804 {
4805         struct tpacpi_led_classdev *data =
4806                         container_of(work, struct tpacpi_led_classdev, work);
4807
4808         if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING))
4809                 light_set_status((data->new_state != TPACPI_LED_OFF));
4810 }
4811
4812 static void light_sysfs_set(struct led_classdev *led_cdev,
4813                         enum led_brightness brightness)
4814 {
4815         struct tpacpi_led_classdev *data =
4816                 container_of(led_cdev,
4817                              struct tpacpi_led_classdev,
4818                              led_classdev);
4819         data->new_state = (brightness != LED_OFF) ?
4820                                 TPACPI_LED_ON : TPACPI_LED_OFF;
4821         queue_work(tpacpi_wq, &data->work);
4822 }
4823
4824 static enum led_brightness light_sysfs_get(struct led_classdev *led_cdev)
4825 {
4826         return (light_get_status() == 1)? LED_FULL : LED_OFF;
4827 }
4828
4829 static struct tpacpi_led_classdev tpacpi_led_thinklight = {
4830         .led_classdev = {
4831                 .name           = "tpacpi::thinklight",
4832                 .brightness_set = &light_sysfs_set,
4833                 .brightness_get = &light_sysfs_get,
4834         }
4835 };
4836
4837 static int __init light_init(struct ibm_init_struct *iibm)
4838 {
4839         int rc;
4840
4841         vdbg_printk(TPACPI_DBG_INIT, "initializing light subdriver\n");
4842
4843         if (tpacpi_is_ibm()) {
4844                 TPACPI_ACPIHANDLE_INIT(ledb);
4845                 TPACPI_ACPIHANDLE_INIT(lght);
4846         }
4847         TPACPI_ACPIHANDLE_INIT(cmos);
4848         INIT_WORK(&tpacpi_led_thinklight.work, light_set_status_worker);
4849
4850         /* light not supported on 570, 600e/x, 770e, 770x, G4x, R30, R31 */
4851         tp_features.light = (cmos_handle || lght_handle) && !ledb_handle;
4852
4853         if (tp_features.light)
4854                 /* light status not supported on
4855                    570, 600e/x, 770e, 770x, G4x, R30, R31, R32, X20 */
4856                 tp_features.light_status =
4857                         acpi_evalf(ec_handle, NULL, "KBLT", "qv");
4858
4859         vdbg_printk(TPACPI_DBG_INIT, "light is %s, light status is %s\n",
4860                 str_supported(tp_features.light),
4861                 str_supported(tp_features.light_status));
4862
4863         if (!tp_features.light)
4864                 return 1;
4865
4866         rc = led_classdev_register(&tpacpi_pdev->dev,
4867                                    &tpacpi_led_thinklight.led_classdev);
4868
4869         if (rc < 0) {
4870                 tp_features.light = 0;
4871                 tp_features.light_status = 0;
4872         } else  {
4873                 rc = 0;
4874         }
4875
4876         return rc;
4877 }
4878
4879 static void light_exit(void)
4880 {
4881         led_classdev_unregister(&tpacpi_led_thinklight.led_classdev);
4882         if (work_pending(&tpacpi_led_thinklight.work))
4883                 flush_workqueue(tpacpi_wq);
4884 }
4885
4886 static int light_read(struct seq_file *m)
4887 {
4888         int status;
4889
4890         if (!tp_features.light) {
4891                 seq_printf(m, "status:\t\tnot supported\n");
4892         } else if (!tp_features.light_status) {
4893                 seq_printf(m, "status:\t\tunknown\n");
4894                 seq_printf(m, "commands:\ton, off\n");
4895         } else {
4896                 status = light_get_status();
4897                 if (status < 0)
4898                         return status;
4899                 seq_printf(m, "status:\t\t%s\n", onoff(status, 0));
4900                 seq_printf(m, "commands:\ton, off\n");
4901         }
4902
4903         return 0;
4904 }
4905
4906 static int light_write(char *buf)
4907 {
4908         char *cmd;
4909         int newstatus = 0;
4910
4911         if (!tp_features.light)
4912                 return -ENODEV;
4913
4914         while ((cmd = next_cmd(&buf))) {
4915                 if (strlencmp(cmd, "on") == 0) {
4916                         newstatus = 1;
4917                 } else if (strlencmp(cmd, "off") == 0) {
4918                         newstatus = 0;
4919                 } else
4920                         return -EINVAL;
4921         }
4922
4923         return light_set_status(newstatus);
4924 }
4925
4926 static struct ibm_struct light_driver_data = {
4927         .name = "light",
4928         .read = light_read,
4929         .write = light_write,
4930         .exit = light_exit,
4931 };
4932
4933 /*************************************************************************
4934  * CMOS subdriver
4935  */
4936
4937 /* sysfs cmos_command -------------------------------------------------- */
4938 static ssize_t cmos_command_store(struct device *dev,
4939                             struct device_attribute *attr,
4940                             const char *buf, size_t count)
4941 {
4942         unsigned long cmos_cmd;
4943         int res;
4944
4945         if (parse_strtoul(buf, 21, &cmos_cmd))
4946                 return -EINVAL;
4947
4948         res = issue_thinkpad_cmos_command(cmos_cmd);
4949         return (res)? res : count;
4950 }
4951
4952 static struct device_attribute dev_attr_cmos_command =
4953         __ATTR(cmos_command, S_IWUSR, NULL, cmos_command_store);
4954
4955 /* --------------------------------------------------------------------- */
4956
4957 static int __init cmos_init(struct ibm_init_struct *iibm)
4958 {
4959         int res;
4960
4961         vdbg_printk(TPACPI_DBG_INIT,
4962                 "initializing cmos commands subdriver\n");
4963
4964         TPACPI_ACPIHANDLE_INIT(cmos);
4965
4966         vdbg_printk(TPACPI_DBG_INIT, "cmos commands are %s\n",
4967                 str_supported(cmos_handle != NULL));
4968
4969         res = device_create_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
4970         if (res)
4971                 return res;
4972
4973         return (cmos_handle)? 0 : 1;
4974 }
4975
4976 static void cmos_exit(void)
4977 {
4978         device_remove_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
4979 }
4980
4981 static int cmos_read(struct seq_file *m)
4982 {
4983         /* cmos not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
4984            R30, R31, T20-22, X20-21 */
4985         if (!cmos_handle)
4986                 seq_printf(m, "status:\t\tnot supported\n");
4987         else {
4988                 seq_printf(m, "status:\t\tsupported\n");
4989                 seq_printf(m, "commands:\t<cmd> (<cmd> is 0-21)\n");
4990         }
4991
4992         return 0;
4993 }
4994
4995 static int cmos_write(char *buf)
4996 {
4997         char *cmd;
4998         int cmos_cmd, res;
4999
5000         while ((cmd = next_cmd(&buf))) {
5001                 if (sscanf(cmd, "%u", &cmos_cmd) == 1 &&
5002                     cmos_cmd >= 0 && cmos_cmd <= 21) {
5003                         /* cmos_cmd set */
5004                 } else
5005                         return -EINVAL;
5006
5007                 res = issue_thinkpad_cmos_command(cmos_cmd);
5008                 if (res)
5009                         return res;
5010         }
5011
5012         return 0;
5013 }
5014
5015 static struct ibm_struct cmos_driver_data = {
5016         .name = "cmos",
5017         .read = cmos_read,
5018         .write = cmos_write,
5019         .exit = cmos_exit,
5020 };
5021
5022 /*************************************************************************
5023  * LED subdriver
5024  */
5025
5026 enum led_access_mode {
5027         TPACPI_LED_NONE = 0,
5028         TPACPI_LED_570, /* 570 */
5029         TPACPI_LED_OLD, /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
5030         TPACPI_LED_NEW, /* all others */
5031 };
5032
5033 enum {  /* For TPACPI_LED_OLD */
5034         TPACPI_LED_EC_HLCL = 0x0c,      /* EC reg to get led to power on */
5035         TPACPI_LED_EC_HLBL = 0x0d,      /* EC reg to blink a lit led */
5036         TPACPI_LED_EC_HLMS = 0x0e,      /* EC reg to select led to command */
5037 };
5038
5039 static enum led_access_mode led_supported;
5040
5041 static acpi_handle led_handle;
5042
5043 #define TPACPI_LED_NUMLEDS 16
5044 static struct tpacpi_led_classdev *tpacpi_leds;
5045 static enum led_status_t tpacpi_led_state_cache[TPACPI_LED_NUMLEDS];
5046 static const char * const tpacpi_led_names[TPACPI_LED_NUMLEDS] = {
5047         /* there's a limit of 19 chars + NULL before 2.6.26 */
5048         "tpacpi::power",
5049         "tpacpi:orange:batt",
5050         "tpacpi:green:batt",
5051         "tpacpi::dock_active",
5052         "tpacpi::bay_active",
5053         "tpacpi::dock_batt",
5054         "tpacpi::unknown_led",
5055         "tpacpi::standby",
5056         "tpacpi::dock_status1",
5057         "tpacpi::dock_status2",
5058         "tpacpi::unknown_led2",
5059         "tpacpi::unknown_led3",
5060         "tpacpi::thinkvantage",
5061 };
5062 #define TPACPI_SAFE_LEDS        0x1081U
5063
5064 static inline bool tpacpi_is_led_restricted(const unsigned int led)
5065 {
5066 #ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS
5067         return false;
5068 #else
5069         return (1U & (TPACPI_SAFE_LEDS >> led)) == 0;
5070 #endif
5071 }
5072
5073 static int led_get_status(const unsigned int led)
5074 {
5075         int status;
5076         enum led_status_t led_s;
5077
5078         switch (led_supported) {
5079         case TPACPI_LED_570:
5080                 if (!acpi_evalf(ec_handle,
5081                                 &status, "GLED", "dd", 1 << led))
5082                         return -EIO;
5083                 led_s = (status == 0)?
5084                                 TPACPI_LED_OFF :
5085                                 ((status == 1)?
5086                                         TPACPI_LED_ON :
5087                                         TPACPI_LED_BLINK);
5088                 tpacpi_led_state_cache[led] = led_s;
5089                 return led_s;
5090         default:
5091                 return -ENXIO;
5092         }
5093
5094         /* not reached */
5095 }
5096
5097 static int led_set_status(const unsigned int led,
5098                           const enum led_status_t ledstatus)
5099 {
5100         /* off, on, blink. Index is led_status_t */
5101         static const unsigned int led_sled_arg1[] = { 0, 1, 3 };
5102         static const unsigned int led_led_arg1[] = { 0, 0x80, 0xc0 };
5103
5104         int rc = 0;
5105
5106         switch (led_supported) {
5107         case TPACPI_LED_570:
5108                 /* 570 */
5109                 if (unlikely(led > 7))
5110                         return -EINVAL;
5111                 if (unlikely(tpacpi_is_led_restricted(led)))
5112                         return -EPERM;
5113                 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
5114                                 (1 << led), led_sled_arg1[ledstatus]))
5115                         rc = -EIO;
5116                 break;
5117         case TPACPI_LED_OLD:
5118                 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */
5119                 if (unlikely(led > 7))
5120                         return -EINVAL;
5121                 if (unlikely(tpacpi_is_led_restricted(led)))
5122                         return -EPERM;
5123                 rc = ec_write(TPACPI_LED_EC_HLMS, (1 << led));
5124                 if (rc >= 0)
5125                         rc = ec_write(TPACPI_LED_EC_HLBL,
5126                                       (ledstatus == TPACPI_LED_BLINK) << led);
5127                 if (rc >= 0)
5128                         rc = ec_write(TPACPI_LED_EC_HLCL,
5129                                       (ledstatus != TPACPI_LED_OFF) << led);
5130                 break;
5131         case TPACPI_LED_NEW:
5132                 /* all others */
5133                 if (unlikely(led >= TPACPI_LED_NUMLEDS))
5134                         return -EINVAL;
5135                 if (unlikely(tpacpi_is_led_restricted(led)))
5136                         return -EPERM;
5137                 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
5138                                 led, led_led_arg1[ledstatus]))
5139                         rc = -EIO;
5140                 break;
5141         default:
5142                 rc = -ENXIO;
5143         }
5144
5145         if (!rc)
5146                 tpacpi_led_state_cache[led] = ledstatus;
5147
5148         return rc;
5149 }
5150
5151 static void led_set_status_worker(struct work_struct *work)
5152 {
5153         struct tpacpi_led_classdev *data =
5154                 container_of(work, struct tpacpi_led_classdev, work);
5155
5156         if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING))
5157                 led_set_status(data->led, data->new_state);
5158 }
5159
5160 static void led_sysfs_set(struct led_classdev *led_cdev,
5161                         enum led_brightness brightness)
5162 {
5163         struct tpacpi_led_classdev *data = container_of(led_cdev,
5164                              struct tpacpi_led_classdev, led_classdev);
5165
5166         if (brightness == LED_OFF)
5167                 data->new_state = TPACPI_LED_OFF;
5168         else if (tpacpi_led_state_cache[data->led] != TPACPI_LED_BLINK)
5169                 data->new_state = TPACPI_LED_ON;
5170         else
5171                 data->new_state = TPACPI_LED_BLINK;
5172
5173         queue_work(tpacpi_wq, &data->work);
5174 }
5175
5176 static int led_sysfs_blink_set(struct led_classdev *led_cdev,
5177                         unsigned long *delay_on, unsigned long *delay_off)
5178 {
5179         struct tpacpi_led_classdev *data = container_of(led_cdev,
5180                              struct tpacpi_led_classdev, led_classdev);
5181
5182         /* Can we choose the flash rate? */
5183         if (*delay_on == 0 && *delay_off == 0) {
5184                 /* yes. set them to the hardware blink rate (1 Hz) */
5185                 *delay_on = 500; /* ms */
5186                 *delay_off = 500; /* ms */
5187         } else if ((*delay_on != 500) || (*delay_off != 500))
5188                 return -EINVAL;
5189
5190         data->new_state = TPACPI_LED_BLINK;
5191         queue_work(tpacpi_wq, &data->work);
5192
5193         return 0;
5194 }
5195
5196 static enum led_brightness led_sysfs_get(struct led_classdev *led_cdev)
5197 {
5198         int rc;
5199
5200         struct tpacpi_led_classdev *data = container_of(led_cdev,
5201                              struct tpacpi_led_classdev, led_classdev);
5202
5203         rc = led_get_status(data->led);
5204
5205         if (rc == TPACPI_LED_OFF || rc < 0)
5206                 rc = LED_OFF;   /* no error handling in led class :( */
5207         else
5208                 rc = LED_FULL;
5209
5210         return rc;
5211 }
5212
5213 static void led_exit(void)
5214 {
5215         unsigned int i;
5216
5217         for (i = 0; i < TPACPI_LED_NUMLEDS; i++) {
5218                 if (tpacpi_leds[i].led_classdev.name)
5219                         led_classdev_unregister(&tpacpi_leds[i].led_classdev);
5220         }
5221
5222         kfree(tpacpi_leds);
5223 }
5224
5225 static int __init tpacpi_init_led(unsigned int led)
5226 {
5227         int rc;
5228
5229         tpacpi_leds[led].led = led;
5230
5231         /* LEDs with no name don't get registered */
5232         if (!tpacpi_led_names[led])
5233                 return 0;
5234
5235         tpacpi_leds[led].led_classdev.brightness_set = &led_sysfs_set;
5236         tpacpi_leds[led].led_classdev.blink_set = &led_sysfs_blink_set;
5237         if (led_supported == TPACPI_LED_570)
5238                 tpacpi_leds[led].led_classdev.brightness_get =
5239                                                 &led_sysfs_get;
5240
5241         tpacpi_leds[led].led_classdev.name = tpacpi_led_names[led];
5242
5243         INIT_WORK(&tpacpi_leds[led].work, led_set_status_worker);
5244
5245         rc = led_classdev_register(&tpacpi_pdev->dev,
5246                                 &tpacpi_leds[led].led_classdev);
5247         if (rc < 0)
5248                 tpacpi_leds[led].led_classdev.name = NULL;
5249
5250         return rc;
5251 }
5252
5253 static const struct tpacpi_quirk led_useful_qtable[] __initconst = {
5254         TPACPI_Q_IBM('1', 'E', 0x009f), /* A30 */
5255         TPACPI_Q_IBM('1', 'N', 0x009f), /* A31 */
5256         TPACPI_Q_IBM('1', 'G', 0x009f), /* A31 */
5257
5258         TPACPI_Q_IBM('1', 'I', 0x0097), /* T30 */
5259         TPACPI_Q_IBM('1', 'R', 0x0097), /* T40, T41, T42, R50, R51 */
5260         TPACPI_Q_IBM('7', '0', 0x0097), /* T43, R52 */
5261         TPACPI_Q_IBM('1', 'Y', 0x0097), /* T43 */
5262         TPACPI_Q_IBM('1', 'W', 0x0097), /* R50e */
5263         TPACPI_Q_IBM('1', 'V', 0x0097), /* R51 */
5264         TPACPI_Q_IBM('7', '8', 0x0097), /* R51e */
5265         TPACPI_Q_IBM('7', '6', 0x0097), /* R52 */
5266
5267         TPACPI_Q_IBM('1', 'K', 0x00bf), /* X30 */
5268         TPACPI_Q_IBM('1', 'Q', 0x00bf), /* X31, X32 */
5269         TPACPI_Q_IBM('1', 'U', 0x00bf), /* X40 */
5270         TPACPI_Q_IBM('7', '4', 0x00bf), /* X41 */
5271         TPACPI_Q_IBM('7', '5', 0x00bf), /* X41t */
5272
5273         TPACPI_Q_IBM('7', '9', 0x1f97), /* T60 (1) */
5274         TPACPI_Q_IBM('7', '7', 0x1f97), /* Z60* (1) */
5275         TPACPI_Q_IBM('7', 'F', 0x1f97), /* Z61* (1) */
5276         TPACPI_Q_IBM('7', 'B', 0x1fb7), /* X60 (1) */
5277
5278         /* (1) - may have excess leds enabled on MSB */
5279
5280         /* Defaults (order matters, keep last, don't reorder!) */
5281         { /* Lenovo */
5282           .vendor = PCI_VENDOR_ID_LENOVO,
5283           .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY,
5284           .quirks = 0x1fffU,
5285         },
5286         { /* IBM ThinkPads with no EC version string */
5287           .vendor = PCI_VENDOR_ID_IBM,
5288           .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_UNKNOWN,
5289           .quirks = 0x00ffU,
5290         },
5291         { /* IBM ThinkPads with EC version string */
5292           .vendor = PCI_VENDOR_ID_IBM,
5293           .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY,
5294           .quirks = 0x00bfU,
5295         },
5296 };
5297
5298 #undef TPACPI_LEDQ_IBM
5299 #undef TPACPI_LEDQ_LNV
5300
5301 static enum led_access_mode __init led_init_detect_mode(void)
5302 {
5303         acpi_status status;
5304
5305         if (tpacpi_is_ibm()) {
5306                 /* 570 */
5307                 status = acpi_get_handle(ec_handle, "SLED", &led_handle);
5308                 if (ACPI_SUCCESS(status))
5309                         return TPACPI_LED_570;
5310
5311                 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
5312                 status = acpi_get_handle(ec_handle, "SYSL", &led_handle);
5313                 if (ACPI_SUCCESS(status))
5314                         return TPACPI_LED_OLD;
5315         }
5316
5317         /* most others */
5318         status = acpi_get_handle(ec_handle, "LED", &led_handle);
5319         if (ACPI_SUCCESS(status))
5320                 return TPACPI_LED_NEW;
5321
5322         /* R30, R31, and unknown firmwares */
5323         led_handle = NULL;
5324         return TPACPI_LED_NONE;
5325 }
5326
5327 static int __init led_init(struct ibm_init_struct *iibm)
5328 {
5329         unsigned int i;
5330         int rc;
5331         unsigned long useful_leds;
5332
5333         vdbg_printk(TPACPI_DBG_INIT, "initializing LED subdriver\n");
5334
5335         led_supported = led_init_detect_mode();
5336
5337         vdbg_printk(TPACPI_DBG_INIT, "LED commands are %s, mode %d\n",
5338                 str_supported(led_supported), led_supported);
5339
5340         if (led_supported == TPACPI_LED_NONE)
5341                 return 1;
5342
5343         tpacpi_leds = kzalloc(sizeof(*tpacpi_leds) * TPACPI_LED_NUMLEDS,
5344                               GFP_KERNEL);
5345         if (!tpacpi_leds) {
5346                 pr_err("Out of memory for LED data\n");
5347                 return -ENOMEM;
5348         }
5349
5350         useful_leds = tpacpi_check_quirks(led_useful_qtable,
5351                                           ARRAY_SIZE(led_useful_qtable));
5352
5353         for (i = 0; i < TPACPI_LED_NUMLEDS; i++) {
5354                 if (!tpacpi_is_led_restricted(i) &&
5355                     test_bit(i, &useful_leds)) {
5356                         rc = tpacpi_init_led(i);
5357                         if (rc < 0) {
5358                                 led_exit();
5359                                 return rc;
5360                         }
5361                 }
5362         }
5363
5364 #ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS
5365         pr_notice("warning: userspace override of important "
5366                   "firmware LEDs is enabled\n");
5367 #endif
5368         return 0;
5369 }
5370
5371 #define str_led_status(s) \
5372         ((s) == TPACPI_LED_OFF ? "off" : \
5373                 ((s) == TPACPI_LED_ON ? "on" : "blinking"))
5374
5375 static int led_read(struct seq_file *m)
5376 {
5377         if (!led_supported) {
5378                 seq_printf(m, "status:\t\tnot supported\n");
5379                 return 0;
5380         }
5381         seq_printf(m, "status:\t\tsupported\n");
5382
5383         if (led_supported == TPACPI_LED_570) {
5384                 /* 570 */
5385                 int i, status;
5386                 for (i = 0; i < 8; i++) {
5387                         status = led_get_status(i);
5388                         if (status < 0)
5389                                 return -EIO;
5390                         seq_printf(m, "%d:\t\t%s\n",
5391                                        i, str_led_status(status));
5392                 }
5393         }
5394
5395         seq_printf(m, "commands:\t"
5396                        "<led> on, <led> off, <led> blink (<led> is 0-15)\n");
5397
5398         return 0;
5399 }
5400
5401 static int led_write(char *buf)
5402 {
5403         char *cmd;
5404         int led, rc;
5405         enum led_status_t s;
5406
5407         if (!led_supported)
5408                 return -ENODEV;
5409
5410         while ((cmd = next_cmd(&buf))) {
5411                 if (sscanf(cmd, "%d", &led) != 1 || led < 0 || led > 15)
5412                         return -EINVAL;
5413
5414                 if (strstr(cmd, "off")) {
5415                         s = TPACPI_LED_OFF;
5416                 } else if (strstr(cmd, "on")) {
5417                         s = TPACPI_LED_ON;
5418                 } else if (strstr(cmd, "blink")) {
5419                         s = TPACPI_LED_BLINK;
5420                 } else {
5421                         return -EINVAL;
5422                 }
5423
5424                 rc = led_set_status(led, s);
5425                 if (rc < 0)
5426                         return rc;
5427         }
5428
5429         return 0;
5430 }
5431
5432 static struct ibm_struct led_driver_data = {
5433         .name = "led",
5434         .read = led_read,
5435         .write = led_write,
5436         .exit = led_exit,
5437 };
5438
5439 /*************************************************************************
5440  * Beep subdriver
5441  */
5442
5443 TPACPI_HANDLE(beep, ec, "BEEP");        /* all except R30, R31 */
5444
5445 #define TPACPI_BEEP_Q1 0x0001
5446
5447 static const struct tpacpi_quirk beep_quirk_table[] __initconst = {
5448         TPACPI_Q_IBM('I', 'M', TPACPI_BEEP_Q1), /* 570 */
5449         TPACPI_Q_IBM('I', 'U', TPACPI_BEEP_Q1), /* 570E - unverified */
5450 };
5451
5452 static int __init beep_init(struct ibm_init_struct *iibm)
5453 {
5454         unsigned long quirks;
5455
5456         vdbg_printk(TPACPI_DBG_INIT, "initializing beep subdriver\n");
5457
5458         TPACPI_ACPIHANDLE_INIT(beep);
5459
5460         vdbg_printk(TPACPI_DBG_INIT, "beep is %s\n",
5461                 str_supported(beep_handle != NULL));
5462
5463         quirks = tpacpi_check_quirks(beep_quirk_table,
5464                                      ARRAY_SIZE(beep_quirk_table));
5465
5466         tp_features.beep_needs_two_args = !!(quirks & TPACPI_BEEP_Q1);
5467
5468         return (beep_handle)? 0 : 1;
5469 }
5470
5471 static int beep_read(struct seq_file *m)
5472 {
5473         if (!beep_handle)
5474                 seq_printf(m, "status:\t\tnot supported\n");
5475         else {
5476                 seq_printf(m, "status:\t\tsupported\n");
5477                 seq_printf(m, "commands:\t<cmd> (<cmd> is 0-17)\n");
5478         }
5479
5480         return 0;
5481 }
5482
5483 static int beep_write(char *buf)
5484 {
5485         char *cmd;
5486         int beep_cmd;
5487
5488         if (!beep_handle)
5489                 return -ENODEV;
5490
5491         while ((cmd = next_cmd(&buf))) {
5492                 if (sscanf(cmd, "%u", &beep_cmd) == 1 &&
5493                     beep_cmd >= 0 && beep_cmd <= 17) {
5494                         /* beep_cmd set */
5495                 } else
5496                         return -EINVAL;
5497                 if (tp_features.beep_needs_two_args) {
5498                         if (!acpi_evalf(beep_handle, NULL, NULL, "vdd",
5499                                         beep_cmd, 0))
5500                                 return -EIO;
5501                 } else {
5502                         if (!acpi_evalf(beep_handle, NULL, NULL, "vd",
5503                                         beep_cmd))
5504                                 return -EIO;
5505                 }
5506         }
5507
5508         return 0;
5509 }
5510
5511 static struct ibm_struct beep_driver_data = {
5512         .name = "beep",
5513         .read = beep_read,
5514         .write = beep_write,
5515 };
5516
5517 /*************************************************************************
5518  * Thermal subdriver
5519  */
5520
5521 enum thermal_access_mode {
5522         TPACPI_THERMAL_NONE = 0,        /* No thermal support */
5523         TPACPI_THERMAL_ACPI_TMP07,      /* Use ACPI TMP0-7 */
5524         TPACPI_THERMAL_ACPI_UPDT,       /* Use ACPI TMP0-7 with UPDT */
5525         TPACPI_THERMAL_TPEC_8,          /* Use ACPI EC regs, 8 sensors */
5526         TPACPI_THERMAL_TPEC_16,         /* Use ACPI EC regs, 16 sensors */
5527 };
5528
5529 enum { /* TPACPI_THERMAL_TPEC_* */
5530         TP_EC_THERMAL_TMP0 = 0x78,      /* ACPI EC regs TMP 0..7 */
5531         TP_EC_THERMAL_TMP8 = 0xC0,      /* ACPI EC regs TMP 8..15 */
5532         TP_EC_THERMAL_TMP_NA = -128,    /* ACPI EC sensor not available */
5533
5534         TPACPI_THERMAL_SENSOR_NA = -128000, /* Sensor not available */
5535 };
5536
5537
5538 #define TPACPI_MAX_THERMAL_SENSORS 16   /* Max thermal sensors supported */
5539 struct ibm_thermal_sensors_struct {
5540         s32 temp[TPACPI_MAX_THERMAL_SENSORS];
5541 };
5542
5543 static enum thermal_access_mode thermal_read_mode;
5544
5545 /* idx is zero-based */
5546 static int thermal_get_sensor(int idx, s32 *value)
5547 {
5548         int t;
5549         s8 tmp;
5550         char tmpi[5];
5551
5552         t = TP_EC_THERMAL_TMP0;
5553
5554         switch (thermal_read_mode) {
5555 #if TPACPI_MAX_THERMAL_SENSORS >= 16
5556         case TPACPI_THERMAL_TPEC_16:
5557                 if (idx >= 8 && idx <= 15) {
5558                         t = TP_EC_THERMAL_TMP8;
5559                         idx -= 8;
5560                 }
5561                 /* fallthrough */
5562 #endif
5563         case TPACPI_THERMAL_TPEC_8:
5564                 if (idx <= 7) {
5565                         if (!acpi_ec_read(t + idx, &tmp))
5566                                 return -EIO;
5567                         *value = tmp * 1000;
5568                         return 0;
5569                 }
5570                 break;
5571
5572         case TPACPI_THERMAL_ACPI_UPDT:
5573                 if (idx <= 7) {
5574                         snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
5575                         if (!acpi_evalf(ec_handle, NULL, "UPDT", "v"))
5576                                 return -EIO;
5577                         if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
5578                                 return -EIO;
5579                         *value = (t - 2732) * 100;
5580                         return 0;
5581                 }
5582                 break;
5583
5584         case TPACPI_THERMAL_ACPI_TMP07:
5585                 if (idx <= 7) {
5586                         snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
5587                         if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
5588                                 return -EIO;
5589                         if (t > 127 || t < -127)
5590                                 t = TP_EC_THERMAL_TMP_NA;
5591                         *value = t * 1000;
5592                         return 0;
5593                 }
5594                 break;
5595
5596         case TPACPI_THERMAL_NONE:
5597         default:
5598                 return -ENOSYS;
5599         }
5600
5601         return -EINVAL;
5602 }
5603
5604 static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s)
5605 {
5606         int res, i;
5607         int n;
5608
5609         n = 8;
5610         i = 0;
5611
5612         if (!s)
5613                 return -EINVAL;
5614
5615         if (thermal_read_mode == TPACPI_THERMAL_TPEC_16)
5616                 n = 16;
5617
5618         for (i = 0 ; i < n; i++) {
5619                 res = thermal_get_sensor(i, &s->temp[i]);
5620                 if (res)
5621                         return res;
5622         }
5623
5624         return n;
5625 }
5626
5627 static void thermal_dump_all_sensors(void)
5628 {
5629         int n, i;
5630         struct ibm_thermal_sensors_struct t;
5631
5632         n = thermal_get_sensors(&t);
5633         if (n <= 0)
5634                 return;
5635
5636         pr_notice("temperatures (Celsius):");
5637
5638         for (i = 0; i < n; i++) {
5639                 if (t.temp[i] != TPACPI_THERMAL_SENSOR_NA)
5640                         pr_cont(" %d", (int)(t.temp[i] / 1000));
5641                 else
5642                         pr_cont(" N/A");
5643         }
5644
5645         pr_cont("\n");
5646 }
5647
5648 /* sysfs temp##_input -------------------------------------------------- */
5649
5650 static ssize_t thermal_temp_input_show(struct device *dev,
5651                            struct device_attribute *attr,
5652                            char *buf)
5653 {
5654         struct sensor_device_attribute *sensor_attr =
5655                                         to_sensor_dev_attr(attr);
5656         int idx = sensor_attr->index;
5657         s32 value;
5658         int res;
5659
5660         res = thermal_get_sensor(idx, &value);
5661         if (res)
5662                 return res;
5663         if (value == TPACPI_THERMAL_SENSOR_NA)
5664                 return -ENXIO;
5665
5666         return snprintf(buf, PAGE_SIZE, "%d\n", value);
5667 }
5668
5669 #define THERMAL_SENSOR_ATTR_TEMP(_idxA, _idxB) \
5670          SENSOR_ATTR(temp##_idxA##_input, S_IRUGO, \
5671                      thermal_temp_input_show, NULL, _idxB)
5672
5673 static struct sensor_device_attribute sensor_dev_attr_thermal_temp_input[] = {
5674         THERMAL_SENSOR_ATTR_TEMP(1, 0),
5675         THERMAL_SENSOR_ATTR_TEMP(2, 1),
5676         THERMAL_SENSOR_ATTR_TEMP(3, 2),
5677         THERMAL_SENSOR_ATTR_TEMP(4, 3),
5678         THERMAL_SENSOR_ATTR_TEMP(5, 4),
5679         THERMAL_SENSOR_ATTR_TEMP(6, 5),
5680         THERMAL_SENSOR_ATTR_TEMP(7, 6),
5681         THERMAL_SENSOR_ATTR_TEMP(8, 7),
5682         THERMAL_SENSOR_ATTR_TEMP(9, 8),
5683         THERMAL_SENSOR_ATTR_TEMP(10, 9),
5684         THERMAL_SENSOR_ATTR_TEMP(11, 10),
5685         THERMAL_SENSOR_ATTR_TEMP(12, 11),
5686         THERMAL_SENSOR_ATTR_TEMP(13, 12),
5687         THERMAL_SENSOR_ATTR_TEMP(14, 13),
5688         THERMAL_SENSOR_ATTR_TEMP(15, 14),
5689         THERMAL_SENSOR_ATTR_TEMP(16, 15),
5690 };
5691
5692 #define THERMAL_ATTRS(X) \
5693         &sensor_dev_attr_thermal_temp_input[X].dev_attr.attr
5694
5695 static struct attribute *thermal_temp_input_attr[] = {
5696         THERMAL_ATTRS(8),
5697         THERMAL_ATTRS(9),
5698         THERMAL_ATTRS(10),
5699         THERMAL_ATTRS(11),
5700         THERMAL_ATTRS(12),
5701         THERMAL_ATTRS(13),
5702         THERMAL_ATTRS(14),
5703         THERMAL_ATTRS(15),
5704         THERMAL_ATTRS(0),
5705         THERMAL_ATTRS(1),
5706         THERMAL_ATTRS(2),
5707         THERMAL_ATTRS(3),
5708         THERMAL_ATTRS(4),
5709         THERMAL_ATTRS(5),
5710         THERMAL_ATTRS(6),
5711         THERMAL_ATTRS(7),
5712         NULL
5713 };
5714
5715 static const struct attribute_group thermal_temp_input16_group = {
5716         .attrs = thermal_temp_input_attr
5717 };
5718
5719 static const struct attribute_group thermal_temp_input8_group = {
5720         .attrs = &thermal_temp_input_attr[8]
5721 };
5722
5723 #undef THERMAL_SENSOR_ATTR_TEMP
5724 #undef THERMAL_ATTRS
5725
5726 /* --------------------------------------------------------------------- */
5727
5728 static int __init thermal_init(struct ibm_init_struct *iibm)
5729 {
5730         u8 t, ta1, ta2;
5731         int i;
5732         int acpi_tmp7;
5733         int res;
5734
5735         vdbg_printk(TPACPI_DBG_INIT, "initializing thermal subdriver\n");
5736
5737         acpi_tmp7 = acpi_evalf(ec_handle, NULL, "TMP7", "qv");
5738
5739         if (thinkpad_id.ec_model) {
5740                 /*
5741                  * Direct EC access mode: sensors at registers
5742                  * 0x78-0x7F, 0xC0-0xC7.  Registers return 0x00 for
5743                  * non-implemented, thermal sensors return 0x80 when
5744                  * not available
5745                  */
5746
5747                 ta1 = ta2 = 0;
5748                 for (i = 0; i < 8; i++) {
5749                         if (acpi_ec_read(TP_EC_THERMAL_TMP0 + i, &t)) {
5750                                 ta1 |= t;
5751                         } else {
5752                                 ta1 = 0;
5753                                 break;
5754                         }
5755                         if (acpi_ec_read(TP_EC_THERMAL_TMP8 + i, &t)) {
5756                                 ta2 |= t;
5757                         } else {
5758                                 ta1 = 0;
5759                                 break;
5760                         }
5761                 }
5762                 if (ta1 == 0) {
5763                         /* This is sheer paranoia, but we handle it anyway */
5764                         if (acpi_tmp7) {
5765                                 pr_err("ThinkPad ACPI EC access misbehaving, "
5766                                        "falling back to ACPI TMPx access "
5767                                        "mode\n");
5768                                 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
5769                         } else {
5770                                 pr_err("ThinkPad ACPI EC access misbehaving, "
5771                                        "disabling thermal sensors access\n");
5772                                 thermal_read_mode = TPACPI_THERMAL_NONE;
5773                         }
5774                 } else {
5775                         thermal_read_mode =
5776                             (ta2 != 0) ?
5777                             TPACPI_THERMAL_TPEC_16 : TPACPI_THERMAL_TPEC_8;
5778                 }
5779         } else if (acpi_tmp7) {
5780                 if (tpacpi_is_ibm() &&
5781                     acpi_evalf(ec_handle, NULL, "UPDT", "qv")) {
5782                         /* 600e/x, 770e, 770x */
5783                         thermal_read_mode = TPACPI_THERMAL_ACPI_UPDT;
5784                 } else {
5785                         /* IBM/LENOVO DSDT EC.TMPx access, max 8 sensors */
5786                         thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
5787                 }
5788         } else {
5789                 /* temperatures not supported on 570, G4x, R30, R31, R32 */
5790                 thermal_read_mode = TPACPI_THERMAL_NONE;
5791         }
5792
5793         vdbg_printk(TPACPI_DBG_INIT, "thermal is %s, mode %d\n",
5794                 str_supported(thermal_read_mode != TPACPI_THERMAL_NONE),
5795                 thermal_read_mode);
5796
5797         switch (thermal_read_mode) {
5798         case TPACPI_THERMAL_TPEC_16:
5799                 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
5800                                 &thermal_temp_input16_group);
5801                 if (res)
5802                         return res;
5803                 break;
5804         case TPACPI_THERMAL_TPEC_8:
5805         case TPACPI_THERMAL_ACPI_TMP07:
5806         case TPACPI_THERMAL_ACPI_UPDT:
5807                 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
5808                                 &thermal_temp_input8_group);
5809                 if (res)
5810                         return res;
5811                 break;
5812         case TPACPI_THERMAL_NONE:
5813         default:
5814                 return 1;
5815         }
5816
5817         return 0;
5818 }
5819
5820 static void thermal_exit(void)
5821 {
5822         switch (thermal_read_mode) {
5823         case TPACPI_THERMAL_TPEC_16:
5824                 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
5825                                    &thermal_temp_input16_group);
5826                 break;
5827         case TPACPI_THERMAL_TPEC_8:
5828         case TPACPI_THERMAL_ACPI_TMP07:
5829         case TPACPI_THERMAL_ACPI_UPDT:
5830                 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
5831                                    &thermal_temp_input8_group);
5832                 break;
5833         case TPACPI_THERMAL_NONE:
5834         default:
5835                 break;
5836         }
5837 }
5838
5839 static int thermal_read(struct seq_file *m)
5840 {
5841         int n, i;
5842         struct ibm_thermal_sensors_struct t;
5843
5844         n = thermal_get_sensors(&t);
5845         if (unlikely(n < 0))
5846                 return n;
5847
5848         seq_printf(m, "temperatures:\t");
5849
5850         if (n > 0) {
5851                 for (i = 0; i < (n - 1); i++)
5852                         seq_printf(m, "%d ", t.temp[i] / 1000);
5853                 seq_printf(m, "%d\n", t.temp[i] / 1000);
5854         } else
5855                 seq_printf(m, "not supported\n");
5856
5857         return 0;
5858 }
5859
5860 static struct ibm_struct thermal_driver_data = {
5861         .name = "thermal",
5862         .read = thermal_read,
5863         .exit = thermal_exit,
5864 };
5865
5866 /*************************************************************************
5867  * Backlight/brightness subdriver
5868  */
5869
5870 #define TPACPI_BACKLIGHT_DEV_NAME "thinkpad_screen"
5871
5872 /*
5873  * ThinkPads can read brightness from two places: EC HBRV (0x31), or
5874  * CMOS NVRAM byte 0x5E, bits 0-3.
5875  *
5876  * EC HBRV (0x31) has the following layout
5877  *   Bit 7: unknown function
5878  *   Bit 6: unknown function
5879  *   Bit 5: Z: honour scale changes, NZ: ignore scale changes
5880  *   Bit 4: must be set to zero to avoid problems
5881  *   Bit 3-0: backlight brightness level
5882  *
5883  * brightness_get_raw returns status data in the HBRV layout
5884  *
5885  * WARNING: The X61 has been verified to use HBRV for something else, so
5886  * this should be used _only_ on IBM ThinkPads, and maybe with some careful
5887  * testing on the very early *60 Lenovo models...
5888  */
5889
5890 enum {
5891         TP_EC_BACKLIGHT = 0x31,
5892
5893         /* TP_EC_BACKLIGHT bitmasks */
5894         TP_EC_BACKLIGHT_LVLMSK = 0x1F,
5895         TP_EC_BACKLIGHT_CMDMSK = 0xE0,
5896         TP_EC_BACKLIGHT_MAPSW = 0x20,
5897 };
5898
5899 enum tpacpi_brightness_access_mode {
5900         TPACPI_BRGHT_MODE_AUTO = 0,     /* Not implemented yet */
5901         TPACPI_BRGHT_MODE_EC,           /* EC control */
5902         TPACPI_BRGHT_MODE_UCMS_STEP,    /* UCMS step-based control */
5903         TPACPI_BRGHT_MODE_ECNVRAM,      /* EC control w/ NVRAM store */
5904         TPACPI_BRGHT_MODE_MAX
5905 };
5906
5907 static struct backlight_device *ibm_backlight_device;
5908
5909 static enum tpacpi_brightness_access_mode brightness_mode =
5910                 TPACPI_BRGHT_MODE_MAX;
5911
5912 static unsigned int brightness_enable = 2; /* 2 = auto, 0 = no, 1 = yes */
5913
5914 static struct mutex brightness_mutex;
5915
5916 /* NVRAM brightness access,
5917  * call with brightness_mutex held! */
5918 static unsigned int tpacpi_brightness_nvram_get(void)
5919 {
5920         u8 lnvram;
5921
5922         lnvram = (nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS)
5923                   & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
5924                   >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
5925         lnvram &= bright_maxlvl;
5926
5927         return lnvram;
5928 }
5929
5930 static void tpacpi_brightness_checkpoint_nvram(void)
5931 {
5932         u8 lec = 0;
5933         u8 b_nvram;
5934
5935         if (brightness_mode != TPACPI_BRGHT_MODE_ECNVRAM)
5936                 return;
5937
5938         vdbg_printk(TPACPI_DBG_BRGHT,
5939                 "trying to checkpoint backlight level to NVRAM...\n");
5940
5941         if (mutex_lock_killable(&brightness_mutex) < 0)
5942                 return;
5943
5944         if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
5945                 goto unlock;
5946         lec &= TP_EC_BACKLIGHT_LVLMSK;
5947         b_nvram = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS);
5948
5949         if (lec != ((b_nvram & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
5950                              >> TP_NVRAM_POS_LEVEL_BRIGHTNESS)) {
5951                 /* NVRAM needs update */
5952                 b_nvram &= ~(TP_NVRAM_MASK_LEVEL_BRIGHTNESS <<
5953                                 TP_NVRAM_POS_LEVEL_BRIGHTNESS);
5954                 b_nvram |= lec;
5955                 nvram_write_byte(b_nvram, TP_NVRAM_ADDR_BRIGHTNESS);
5956                 dbg_printk(TPACPI_DBG_BRGHT,
5957                            "updated NVRAM backlight level to %u (0x%02x)\n",
5958                            (unsigned int) lec, (unsigned int) b_nvram);
5959         } else
5960                 vdbg_printk(TPACPI_DBG_BRGHT,
5961                            "NVRAM backlight level already is %u (0x%02x)\n",
5962                            (unsigned int) lec, (unsigned int) b_nvram);
5963
5964 unlock:
5965         mutex_unlock(&brightness_mutex);
5966 }
5967
5968
5969 /* call with brightness_mutex held! */
5970 static int tpacpi_brightness_get_raw(int *status)
5971 {
5972         u8 lec = 0;
5973
5974         switch (brightness_mode) {
5975         case TPACPI_BRGHT_MODE_UCMS_STEP:
5976                 *status = tpacpi_brightness_nvram_get();
5977                 return 0;
5978         case TPACPI_BRGHT_MODE_EC:
5979         case TPACPI_BRGHT_MODE_ECNVRAM:
5980                 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
5981                         return -EIO;
5982                 *status = lec;
5983                 return 0;
5984         default:
5985                 return -ENXIO;
5986         }
5987 }
5988
5989 /* call with brightness_mutex held! */
5990 /* do NOT call with illegal backlight level value */
5991 static int tpacpi_brightness_set_ec(unsigned int value)
5992 {
5993         u8 lec = 0;
5994
5995         if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
5996                 return -EIO;
5997
5998         if (unlikely(!acpi_ec_write(TP_EC_BACKLIGHT,
5999                                 (lec & TP_EC_BACKLIGHT_CMDMSK) |
6000                                 (value & TP_EC_BACKLIGHT_LVLMSK))))
6001                 return -EIO;
6002
6003         return 0;
6004 }
6005
6006 /* call with brightness_mutex held! */
6007 static int tpacpi_brightness_set_ucmsstep(unsigned int value)
6008 {
6009         int cmos_cmd, inc;
6010         unsigned int current_value, i;
6011
6012         current_value = tpacpi_brightness_nvram_get();
6013
6014         if (value == current_value)
6015                 return 0;
6016
6017         cmos_cmd = (value > current_value) ?
6018                         TP_CMOS_BRIGHTNESS_UP :
6019                         TP_CMOS_BRIGHTNESS_DOWN;
6020         inc = (value > current_value) ? 1 : -1;
6021
6022         for (i = current_value; i != value; i += inc)
6023                 if (issue_thinkpad_cmos_command(cmos_cmd))
6024                         return -EIO;
6025
6026         return 0;
6027 }
6028
6029 /* May return EINTR which can always be mapped to ERESTARTSYS */
6030 static int brightness_set(unsigned int value)
6031 {
6032         int res;
6033
6034         if (value > bright_maxlvl || value < 0)
6035                 return -EINVAL;
6036
6037         vdbg_printk(TPACPI_DBG_BRGHT,
6038                         "set backlight level to %d\n", value);
6039
6040         res = mutex_lock_killable(&brightness_mutex);
6041         if (res < 0)
6042                 return res;
6043
6044         switch (brightness_mode) {
6045         case TPACPI_BRGHT_MODE_EC:
6046         case TPACPI_BRGHT_MODE_ECNVRAM:
6047                 res = tpacpi_brightness_set_ec(value);
6048                 break;
6049         case TPACPI_BRGHT_MODE_UCMS_STEP:
6050                 res = tpacpi_brightness_set_ucmsstep(value);
6051                 break;
6052         default:
6053                 res = -ENXIO;
6054         }
6055
6056         mutex_unlock(&brightness_mutex);
6057         return res;
6058 }
6059
6060 /* sysfs backlight class ----------------------------------------------- */
6061
6062 static int brightness_update_status(struct backlight_device *bd)
6063 {
6064         unsigned int level =
6065                 (bd->props.fb_blank == FB_BLANK_UNBLANK &&
6066                  bd->props.power == FB_BLANK_UNBLANK) ?
6067                                 bd->props.brightness : 0;
6068
6069         dbg_printk(TPACPI_DBG_BRGHT,
6070                         "backlight: attempt to set level to %d\n",
6071                         level);
6072
6073         /* it is the backlight class's job (caller) to handle
6074          * EINTR and other errors properly */
6075         return brightness_set(level);
6076 }
6077
6078 static int brightness_get(struct backlight_device *bd)
6079 {
6080         int status, res;
6081
6082         res = mutex_lock_killable(&brightness_mutex);
6083         if (res < 0)
6084                 return 0;
6085
6086         res = tpacpi_brightness_get_raw(&status);
6087
6088         mutex_unlock(&brightness_mutex);
6089
6090         if (res < 0)
6091                 return 0;
6092
6093         return status & TP_EC_BACKLIGHT_LVLMSK;
6094 }
6095
6096 static void tpacpi_brightness_notify_change(void)
6097 {
6098         backlight_force_update(ibm_backlight_device,
6099                                BACKLIGHT_UPDATE_HOTKEY);
6100 }
6101
6102 static const struct backlight_ops ibm_backlight_data = {
6103         .get_brightness = brightness_get,
6104         .update_status  = brightness_update_status,
6105 };
6106
6107 /* --------------------------------------------------------------------- */
6108
6109 /*
6110  * Call _BCL method of video device.  On some ThinkPads this will
6111  * switch the firmware to the ACPI brightness control mode.
6112  */
6113
6114 static int __init tpacpi_query_bcl_levels(acpi_handle handle)
6115 {
6116         struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
6117         union acpi_object *obj;
6118         int rc;
6119
6120         if (ACPI_SUCCESS(acpi_evaluate_object(handle, "_BCL", NULL, &buffer))) {
6121                 obj = (union acpi_object *)buffer.pointer;
6122                 if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) {
6123                         pr_err("Unknown _BCL data, please report this to %s\n",
6124                                TPACPI_MAIL);
6125                         rc = 0;
6126                 } else {
6127                         rc = obj->package.count;
6128                 }
6129         } else {
6130                 return 0;
6131         }
6132
6133         kfree(buffer.pointer);
6134         return rc;
6135 }
6136
6137
6138 /*
6139  * Returns 0 (no ACPI _BCL or _BCL invalid), or size of brightness map
6140  */
6141 static unsigned int __init tpacpi_check_std_acpi_brightness_support(void)
6142 {
6143         acpi_handle video_device;
6144         int bcl_levels = 0;
6145
6146         tpacpi_acpi_handle_locate("video", ACPI_VIDEO_HID, &video_device);
6147         if (video_device)
6148                 bcl_levels = tpacpi_query_bcl_levels(video_device);
6149
6150         tp_features.bright_acpimode = (bcl_levels > 0);
6151
6152         return (bcl_levels > 2) ? (bcl_levels - 2) : 0;
6153 }
6154
6155 /*
6156  * These are only useful for models that have only one possibility
6157  * of GPU.  If the BIOS model handles both ATI and Intel, don't use
6158  * these quirks.
6159  */
6160 #define TPACPI_BRGHT_Q_NOEC     0x0001  /* Must NOT use EC HBRV */
6161 #define TPACPI_BRGHT_Q_EC       0x0002  /* Should or must use EC HBRV */
6162 #define TPACPI_BRGHT_Q_ASK      0x8000  /* Ask for user report */
6163
6164 static const struct tpacpi_quirk brightness_quirk_table[] __initconst = {
6165         /* Models with ATI GPUs known to require ECNVRAM mode */
6166         TPACPI_Q_IBM('1', 'Y', TPACPI_BRGHT_Q_EC),      /* T43/p ATI */
6167
6168         /* Models with ATI GPUs that can use ECNVRAM */
6169         TPACPI_Q_IBM('1', 'R', TPACPI_BRGHT_Q_EC),      /* R50,51 T40-42 */
6170         TPACPI_Q_IBM('1', 'Q', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
6171         TPACPI_Q_IBM('7', '6', TPACPI_BRGHT_Q_EC),      /* R52 */
6172         TPACPI_Q_IBM('7', '8', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
6173
6174         /* Models with Intel Extreme Graphics 2 */
6175         TPACPI_Q_IBM('1', 'U', TPACPI_BRGHT_Q_NOEC),    /* X40 */
6176         TPACPI_Q_IBM('1', 'V', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
6177         TPACPI_Q_IBM('1', 'W', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
6178
6179         /* Models with Intel GMA900 */
6180         TPACPI_Q_IBM('7', '0', TPACPI_BRGHT_Q_NOEC),    /* T43, R52 */
6181         TPACPI_Q_IBM('7', '4', TPACPI_BRGHT_Q_NOEC),    /* X41 */
6182         TPACPI_Q_IBM('7', '5', TPACPI_BRGHT_Q_NOEC),    /* X41 Tablet */
6183 };
6184
6185 /*
6186  * Returns < 0 for error, otherwise sets tp_features.bright_*
6187  * and bright_maxlvl.
6188  */
6189 static void __init tpacpi_detect_brightness_capabilities(void)
6190 {
6191         unsigned int b;
6192
6193         vdbg_printk(TPACPI_DBG_INIT,
6194                     "detecting firmware brightness interface capabilities\n");
6195
6196         /* we could run a quirks check here (same table used by
6197          * brightness_init) if needed */
6198
6199         /*
6200          * We always attempt to detect acpi support, so as to switch
6201          * Lenovo Vista BIOS to ACPI brightness mode even if we are not
6202          * going to publish a backlight interface
6203          */
6204         b = tpacpi_check_std_acpi_brightness_support();
6205         switch (b) {
6206         case 16:
6207                 bright_maxlvl = 15;
6208                 pr_info("detected a 16-level brightness capable ThinkPad\n");
6209                 break;
6210         case 8:
6211         case 0:
6212                 bright_maxlvl = 7;
6213                 pr_info("detected a 8-level brightness capable ThinkPad\n");
6214                 break;
6215         default:
6216                 pr_err("Unsupported brightness interface, "
6217                        "please contact %s\n", TPACPI_MAIL);
6218                 tp_features.bright_unkfw = 1;
6219                 bright_maxlvl = b - 1;
6220         }
6221 }
6222
6223 static int __init brightness_init(struct ibm_init_struct *iibm)
6224 {
6225         struct backlight_properties props;
6226         int b;
6227         unsigned long quirks;
6228
6229         vdbg_printk(TPACPI_DBG_INIT, "initializing brightness subdriver\n");
6230
6231         mutex_init(&brightness_mutex);
6232
6233         quirks = tpacpi_check_quirks(brightness_quirk_table,
6234                                 ARRAY_SIZE(brightness_quirk_table));
6235
6236         /* tpacpi_detect_brightness_capabilities() must have run already */
6237
6238         /* if it is unknown, we don't handle it: it wouldn't be safe */
6239         if (tp_features.bright_unkfw)
6240                 return 1;
6241
6242         if (!brightness_enable) {
6243                 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT,
6244                            "brightness support disabled by "
6245                            "module parameter\n");
6246                 return 1;
6247         }
6248
6249         if (acpi_video_backlight_support()) {
6250                 if (brightness_enable > 1) {
6251                         pr_info("Standard ACPI backlight interface "
6252                                 "available, not loading native one\n");
6253                         return 1;
6254                 } else if (brightness_enable == 1) {
6255                         pr_warn("Cannot enable backlight brightness support, "
6256                                 "ACPI is already handling it.  Refer to the "
6257                                 "acpi_backlight kernel parameter.\n");
6258                         return 1;
6259                 }
6260         } else if (tp_features.bright_acpimode && brightness_enable > 1) {
6261                 pr_notice("Standard ACPI backlight interface not "
6262                           "available, thinkpad_acpi native "
6263                           "brightness control enabled\n");
6264         }
6265
6266         /*
6267          * Check for module parameter bogosity, note that we
6268          * init brightness_mode to TPACPI_BRGHT_MODE_MAX in order to be
6269          * able to detect "unspecified"
6270          */
6271         if (brightness_mode > TPACPI_BRGHT_MODE_MAX)
6272                 return -EINVAL;
6273
6274         /* TPACPI_BRGHT_MODE_AUTO not implemented yet, just use default */
6275         if (brightness_mode == TPACPI_BRGHT_MODE_AUTO ||
6276             brightness_mode == TPACPI_BRGHT_MODE_MAX) {
6277                 if (quirks & TPACPI_BRGHT_Q_EC)
6278                         brightness_mode = TPACPI_BRGHT_MODE_ECNVRAM;
6279                 else
6280                         brightness_mode = TPACPI_BRGHT_MODE_UCMS_STEP;
6281
6282                 dbg_printk(TPACPI_DBG_BRGHT,
6283                            "driver auto-selected brightness_mode=%d\n",
6284                            brightness_mode);
6285         }
6286
6287         /* Safety */
6288         if (!tpacpi_is_ibm() &&
6289             (brightness_mode == TPACPI_BRGHT_MODE_ECNVRAM ||
6290              brightness_mode == TPACPI_BRGHT_MODE_EC))
6291                 return -EINVAL;
6292
6293         if (tpacpi_brightness_get_raw(&b) < 0)
6294                 return 1;
6295
6296         memset(&props, 0, sizeof(struct backlight_properties));
6297         props.type = BACKLIGHT_PLATFORM;
6298         props.max_brightness = bright_maxlvl;
6299         props.brightness = b & TP_EC_BACKLIGHT_LVLMSK;
6300         ibm_backlight_device = backlight_device_register(TPACPI_BACKLIGHT_DEV_NAME,
6301                                                          NULL, NULL,
6302                                                          &ibm_backlight_data,
6303                                  &nb