562fcf0dd2b5b083b7d45aeeb7e78a7c6809425f
[linux-2.6.git] / drivers / platform / x86 / thinkpad_acpi.c
1 /*
2  *  thinkpad_acpi.c - ThinkPad ACPI Extras
3  *
4  *
5  *  Copyright (C) 2004-2005 Borislav Deianov <borislav@users.sf.net>
6  *  Copyright (C) 2006-2009 Henrique de Moraes Holschuh <hmh@hmh.eng.br>
7  *
8  *  This program is free software; you can redistribute it and/or modify
9  *  it under the terms of the GNU General Public License as published by
10  *  the Free Software Foundation; either version 2 of the License, or
11  *  (at your option) any later version.
12  *
13  *  This program is distributed in the hope that it will be useful,
14  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
15  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
16  *  GNU General Public License for more details.
17  *
18  *  You should have received a copy of the GNU General Public License
19  *  along with this program; if not, write to the Free Software
20  *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
21  *  02110-1301, USA.
22  */
23
24 #define TPACPI_VERSION "0.24"
25 #define TPACPI_SYSFS_VERSION 0x020700
26
27 /*
28  *  Changelog:
29  *  2007-10-20          changelog trimmed down
30  *
31  *  2007-03-27  0.14    renamed to thinkpad_acpi and moved to
32  *                      drivers/misc.
33  *
34  *  2006-11-22  0.13    new maintainer
35  *                      changelog now lives in git commit history, and will
36  *                      not be updated further in-file.
37  *
38  *  2005-03-17  0.11    support for 600e, 770x
39  *                          thanks to Jamie Lentin <lentinj@dial.pipex.com>
40  *
41  *  2005-01-16  0.9     use MODULE_VERSION
42  *                          thanks to Henrik Brix Andersen <brix@gentoo.org>
43  *                      fix parameter passing on module loading
44  *                          thanks to Rusty Russell <rusty@rustcorp.com.au>
45  *                          thanks to Jim Radford <radford@blackbean.org>
46  *  2004-11-08  0.8     fix init error case, don't return from a macro
47  *                          thanks to Chris Wright <chrisw@osdl.org>
48  */
49
50 #include <linux/kernel.h>
51 #include <linux/module.h>
52 #include <linux/init.h>
53 #include <linux/types.h>
54 #include <linux/string.h>
55 #include <linux/list.h>
56 #include <linux/mutex.h>
57 #include <linux/sched.h>
58 #include <linux/kthread.h>
59 #include <linux/freezer.h>
60 #include <linux/delay.h>
61 #include <linux/slab.h>
62
63 #include <linux/nvram.h>
64 #include <linux/proc_fs.h>
65 #include <linux/seq_file.h>
66 #include <linux/sysfs.h>
67 #include <linux/backlight.h>
68 #include <linux/fb.h>
69 #include <linux/platform_device.h>
70 #include <linux/hwmon.h>
71 #include <linux/hwmon-sysfs.h>
72 #include <linux/input.h>
73 #include <linux/leds.h>
74 #include <linux/rfkill.h>
75 #include <asm/uaccess.h>
76
77 #include <linux/dmi.h>
78 #include <linux/jiffies.h>
79 #include <linux/workqueue.h>
80
81 #include <sound/core.h>
82 #include <sound/control.h>
83 #include <sound/initval.h>
84
85 #include <acpi/acpi_drivers.h>
86
87 #include <linux/pci_ids.h>
88
89
90 /* ThinkPad CMOS commands */
91 #define TP_CMOS_VOLUME_DOWN     0
92 #define TP_CMOS_VOLUME_UP       1
93 #define TP_CMOS_VOLUME_MUTE     2
94 #define TP_CMOS_BRIGHTNESS_UP   4
95 #define TP_CMOS_BRIGHTNESS_DOWN 5
96 #define TP_CMOS_THINKLIGHT_ON   12
97 #define TP_CMOS_THINKLIGHT_OFF  13
98
99 /* NVRAM Addresses */
100 enum tp_nvram_addr {
101         TP_NVRAM_ADDR_HK2               = 0x57,
102         TP_NVRAM_ADDR_THINKLIGHT        = 0x58,
103         TP_NVRAM_ADDR_VIDEO             = 0x59,
104         TP_NVRAM_ADDR_BRIGHTNESS        = 0x5e,
105         TP_NVRAM_ADDR_MIXER             = 0x60,
106 };
107
108 /* NVRAM bit masks */
109 enum {
110         TP_NVRAM_MASK_HKT_THINKPAD      = 0x08,
111         TP_NVRAM_MASK_HKT_ZOOM          = 0x20,
112         TP_NVRAM_MASK_HKT_DISPLAY       = 0x40,
113         TP_NVRAM_MASK_HKT_HIBERNATE     = 0x80,
114         TP_NVRAM_MASK_THINKLIGHT        = 0x10,
115         TP_NVRAM_MASK_HKT_DISPEXPND     = 0x30,
116         TP_NVRAM_MASK_HKT_BRIGHTNESS    = 0x20,
117         TP_NVRAM_MASK_LEVEL_BRIGHTNESS  = 0x0f,
118         TP_NVRAM_POS_LEVEL_BRIGHTNESS   = 0,
119         TP_NVRAM_MASK_MUTE              = 0x40,
120         TP_NVRAM_MASK_HKT_VOLUME        = 0x80,
121         TP_NVRAM_MASK_LEVEL_VOLUME      = 0x0f,
122         TP_NVRAM_POS_LEVEL_VOLUME       = 0,
123 };
124
125 /* Misc NVRAM-related */
126 enum {
127         TP_NVRAM_LEVEL_VOLUME_MAX = 14,
128 };
129
130 /* ACPI HIDs */
131 #define TPACPI_ACPI_IBM_HKEY_HID        "IBM0068"
132 #define TPACPI_ACPI_LENOVO_HKEY_HID     "LEN0068"
133 #define TPACPI_ACPI_EC_HID              "PNP0C09"
134
135 /* Input IDs */
136 #define TPACPI_HKEY_INPUT_PRODUCT       0x5054 /* "TP" */
137 #define TPACPI_HKEY_INPUT_VERSION       0x4101
138
139 /* ACPI \WGSV commands */
140 enum {
141         TP_ACPI_WGSV_GET_STATE          = 0x01, /* Get state information */
142         TP_ACPI_WGSV_PWR_ON_ON_RESUME   = 0x02, /* Resume WWAN powered on */
143         TP_ACPI_WGSV_PWR_OFF_ON_RESUME  = 0x03, /* Resume WWAN powered off */
144         TP_ACPI_WGSV_SAVE_STATE         = 0x04, /* Save state for S4/S5 */
145 };
146
147 /* TP_ACPI_WGSV_GET_STATE bits */
148 enum {
149         TP_ACPI_WGSV_STATE_WWANEXIST    = 0x0001, /* WWAN hw available */
150         TP_ACPI_WGSV_STATE_WWANPWR      = 0x0002, /* WWAN radio enabled */
151         TP_ACPI_WGSV_STATE_WWANPWRRES   = 0x0004, /* WWAN state at resume */
152         TP_ACPI_WGSV_STATE_WWANBIOSOFF  = 0x0008, /* WWAN disabled in BIOS */
153         TP_ACPI_WGSV_STATE_BLTHEXIST    = 0x0001, /* BLTH hw available */
154         TP_ACPI_WGSV_STATE_BLTHPWR      = 0x0002, /* BLTH radio enabled */
155         TP_ACPI_WGSV_STATE_BLTHPWRRES   = 0x0004, /* BLTH state at resume */
156         TP_ACPI_WGSV_STATE_BLTHBIOSOFF  = 0x0008, /* BLTH disabled in BIOS */
157         TP_ACPI_WGSV_STATE_UWBEXIST     = 0x0010, /* UWB hw available */
158         TP_ACPI_WGSV_STATE_UWBPWR       = 0x0020, /* UWB radio enabled */
159 };
160
161 /* HKEY events */
162 enum tpacpi_hkey_event_t {
163         /* Hotkey-related */
164         TP_HKEY_EV_HOTKEY_BASE          = 0x1001, /* first hotkey (FN+F1) */
165         TP_HKEY_EV_BRGHT_UP             = 0x1010, /* Brightness up */
166         TP_HKEY_EV_BRGHT_DOWN           = 0x1011, /* Brightness down */
167         TP_HKEY_EV_VOL_UP               = 0x1015, /* Volume up or unmute */
168         TP_HKEY_EV_VOL_DOWN             = 0x1016, /* Volume down or unmute */
169         TP_HKEY_EV_VOL_MUTE             = 0x1017, /* Mixer output mute */
170
171         /* Reasons for waking up from S3/S4 */
172         TP_HKEY_EV_WKUP_S3_UNDOCK       = 0x2304, /* undock requested, S3 */
173         TP_HKEY_EV_WKUP_S4_UNDOCK       = 0x2404, /* undock requested, S4 */
174         TP_HKEY_EV_WKUP_S3_BAYEJ        = 0x2305, /* bay ejection req, S3 */
175         TP_HKEY_EV_WKUP_S4_BAYEJ        = 0x2405, /* bay ejection req, S4 */
176         TP_HKEY_EV_WKUP_S3_BATLOW       = 0x2313, /* battery empty, S3 */
177         TP_HKEY_EV_WKUP_S4_BATLOW       = 0x2413, /* battery empty, S4 */
178
179         /* Auto-sleep after eject request */
180         TP_HKEY_EV_BAYEJ_ACK            = 0x3003, /* bay ejection complete */
181         TP_HKEY_EV_UNDOCK_ACK           = 0x4003, /* undock complete */
182
183         /* Misc bay events */
184         TP_HKEY_EV_OPTDRV_EJ            = 0x3006, /* opt. drive tray ejected */
185
186         /* User-interface events */
187         TP_HKEY_EV_LID_CLOSE            = 0x5001, /* laptop lid closed */
188         TP_HKEY_EV_LID_OPEN             = 0x5002, /* laptop lid opened */
189         TP_HKEY_EV_TABLET_TABLET        = 0x5009, /* tablet swivel up */
190         TP_HKEY_EV_TABLET_NOTEBOOK      = 0x500a, /* tablet swivel down */
191         TP_HKEY_EV_PEN_INSERTED         = 0x500b, /* tablet pen inserted */
192         TP_HKEY_EV_PEN_REMOVED          = 0x500c, /* tablet pen removed */
193         TP_HKEY_EV_BRGHT_CHANGED        = 0x5010, /* backlight control event */
194
195         /* Thermal events */
196         TP_HKEY_EV_ALARM_BAT_HOT        = 0x6011, /* battery too hot */
197         TP_HKEY_EV_ALARM_BAT_XHOT       = 0x6012, /* battery critically hot */
198         TP_HKEY_EV_ALARM_SENSOR_HOT     = 0x6021, /* sensor too hot */
199         TP_HKEY_EV_ALARM_SENSOR_XHOT    = 0x6022, /* sensor critically hot */
200         TP_HKEY_EV_THM_TABLE_CHANGED    = 0x6030, /* thermal table changed */
201
202         /* Misc */
203         TP_HKEY_EV_RFKILL_CHANGED       = 0x7000, /* rfkill switch changed */
204 };
205
206 /****************************************************************************
207  * Main driver
208  */
209
210 #define TPACPI_NAME "thinkpad"
211 #define TPACPI_DESC "ThinkPad ACPI Extras"
212 #define TPACPI_FILE TPACPI_NAME "_acpi"
213 #define TPACPI_URL "http://ibm-acpi.sf.net/"
214 #define TPACPI_MAIL "ibm-acpi-devel@lists.sourceforge.net"
215
216 #define TPACPI_PROC_DIR "ibm"
217 #define TPACPI_ACPI_EVENT_PREFIX "ibm"
218 #define TPACPI_DRVR_NAME TPACPI_FILE
219 #define TPACPI_DRVR_SHORTNAME "tpacpi"
220 #define TPACPI_HWMON_DRVR_NAME TPACPI_NAME "_hwmon"
221
222 #define TPACPI_NVRAM_KTHREAD_NAME "ktpacpi_nvramd"
223 #define TPACPI_WORKQUEUE_NAME "ktpacpid"
224
225 #define TPACPI_MAX_ACPI_ARGS 3
226
227 /* printk headers */
228 #define TPACPI_LOG TPACPI_FILE ": "
229 #define TPACPI_EMERG    KERN_EMERG      TPACPI_LOG
230 #define TPACPI_ALERT    KERN_ALERT      TPACPI_LOG
231 #define TPACPI_CRIT     KERN_CRIT       TPACPI_LOG
232 #define TPACPI_ERR      KERN_ERR        TPACPI_LOG
233 #define TPACPI_WARN     KERN_WARNING    TPACPI_LOG
234 #define TPACPI_NOTICE   KERN_NOTICE     TPACPI_LOG
235 #define TPACPI_INFO     KERN_INFO       TPACPI_LOG
236 #define TPACPI_DEBUG    KERN_DEBUG      TPACPI_LOG
237
238 /* Debugging printk groups */
239 #define TPACPI_DBG_ALL          0xffff
240 #define TPACPI_DBG_DISCLOSETASK 0x8000
241 #define TPACPI_DBG_INIT         0x0001
242 #define TPACPI_DBG_EXIT         0x0002
243 #define TPACPI_DBG_RFKILL       0x0004
244 #define TPACPI_DBG_HKEY         0x0008
245 #define TPACPI_DBG_FAN          0x0010
246 #define TPACPI_DBG_BRGHT        0x0020
247 #define TPACPI_DBG_MIXER        0x0040
248
249 #define onoff(status, bit) ((status) & (1 << (bit)) ? "on" : "off")
250 #define enabled(status, bit) ((status) & (1 << (bit)) ? "enabled" : "disabled")
251 #define strlencmp(a, b) (strncmp((a), (b), strlen(b)))
252
253
254 /****************************************************************************
255  * Driver-wide structs and misc. variables
256  */
257
258 struct ibm_struct;
259
260 struct tp_acpi_drv_struct {
261         const struct acpi_device_id *hid;
262         struct acpi_driver *driver;
263
264         void (*notify) (struct ibm_struct *, u32);
265         acpi_handle *handle;
266         u32 type;
267         struct acpi_device *device;
268 };
269
270 struct ibm_struct {
271         char *name;
272
273         int (*read) (struct seq_file *);
274         int (*write) (char *);
275         void (*exit) (void);
276         void (*resume) (void);
277         void (*suspend) (pm_message_t state);
278         void (*shutdown) (void);
279
280         struct list_head all_drivers;
281
282         struct tp_acpi_drv_struct *acpi;
283
284         struct {
285                 u8 acpi_driver_registered:1;
286                 u8 acpi_notify_installed:1;
287                 u8 proc_created:1;
288                 u8 init_called:1;
289                 u8 experimental:1;
290         } flags;
291 };
292
293 struct ibm_init_struct {
294         char param[32];
295
296         int (*init) (struct ibm_init_struct *);
297         mode_t base_procfs_mode;
298         struct ibm_struct *data;
299 };
300
301 static struct {
302         u32 bluetooth:1;
303         u32 hotkey:1;
304         u32 hotkey_mask:1;
305         u32 hotkey_wlsw:1;
306         u32 hotkey_tablet:1;
307         u32 light:1;
308         u32 light_status:1;
309         u32 bright_acpimode:1;
310         u32 bright_unkfw:1;
311         u32 wan:1;
312         u32 uwb:1;
313         u32 fan_ctrl_status_undef:1;
314         u32 second_fan:1;
315         u32 beep_needs_two_args:1;
316         u32 mixer_no_level_control:1;
317         u32 input_device_registered:1;
318         u32 platform_drv_registered:1;
319         u32 platform_drv_attrs_registered:1;
320         u32 sensors_pdrv_registered:1;
321         u32 sensors_pdrv_attrs_registered:1;
322         u32 sensors_pdev_attrs_registered:1;
323         u32 hotkey_poll_active:1;
324 } tp_features;
325
326 static struct {
327         u16 hotkey_mask_ff:1;
328         u16 volume_ctrl_forbidden:1;
329 } tp_warned;
330
331 struct thinkpad_id_data {
332         unsigned int vendor;    /* ThinkPad vendor:
333                                  * PCI_VENDOR_ID_IBM/PCI_VENDOR_ID_LENOVO */
334
335         char *bios_version_str; /* Something like 1ZET51WW (1.03z) */
336         char *ec_version_str;   /* Something like 1ZHT51WW-1.04a */
337
338         u16 bios_model;         /* 1Y = 0x5931, 0 = unknown */
339         u16 ec_model;
340         u16 bios_release;       /* 1ZETK1WW = 0x314b, 0 = unknown */
341         u16 ec_release;
342
343         char *model_str;        /* ThinkPad T43 */
344         char *nummodel_str;     /* 9384A9C for a 9384-A9C model */
345 };
346 static struct thinkpad_id_data thinkpad_id;
347
348 static enum {
349         TPACPI_LIFE_INIT = 0,
350         TPACPI_LIFE_RUNNING,
351         TPACPI_LIFE_EXITING,
352 } tpacpi_lifecycle;
353
354 static int experimental;
355 static u32 dbg_level;
356
357 static struct workqueue_struct *tpacpi_wq;
358
359 enum led_status_t {
360         TPACPI_LED_OFF = 0,
361         TPACPI_LED_ON,
362         TPACPI_LED_BLINK,
363 };
364
365 /* Special LED class that can defer work */
366 struct tpacpi_led_classdev {
367         struct led_classdev led_classdev;
368         struct work_struct work;
369         enum led_status_t new_state;
370         unsigned int led;
371 };
372
373 /* brightness level capabilities */
374 static unsigned int bright_maxlvl;      /* 0 = unknown */
375
376 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
377 static int dbg_wlswemul;
378 static int tpacpi_wlsw_emulstate;
379 static int dbg_bluetoothemul;
380 static int tpacpi_bluetooth_emulstate;
381 static int dbg_wwanemul;
382 static int tpacpi_wwan_emulstate;
383 static int dbg_uwbemul;
384 static int tpacpi_uwb_emulstate;
385 #endif
386
387
388 /*************************************************************************
389  *  Debugging helpers
390  */
391
392 #define dbg_printk(a_dbg_level, format, arg...) \
393         do { if (dbg_level & (a_dbg_level)) \
394                 printk(TPACPI_DEBUG "%s: " format, __func__ , ## arg); \
395         } while (0)
396
397 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
398 #define vdbg_printk dbg_printk
399 static const char *str_supported(int is_supported);
400 #else
401 #define vdbg_printk(a_dbg_level, format, arg...) \
402         do { } while (0)
403 #endif
404
405 static void tpacpi_log_usertask(const char * const what)
406 {
407         printk(TPACPI_DEBUG "%s: access by process with PID %d\n",
408                 what, task_tgid_vnr(current));
409 }
410
411 #define tpacpi_disclose_usertask(what, format, arg...) \
412         do { \
413                 if (unlikely( \
414                     (dbg_level & TPACPI_DBG_DISCLOSETASK) && \
415                     (tpacpi_lifecycle == TPACPI_LIFE_RUNNING))) { \
416                         printk(TPACPI_DEBUG "%s: PID %d: " format, \
417                                 what, task_tgid_vnr(current), ## arg); \
418                 } \
419         } while (0)
420
421 /*
422  * Quirk handling helpers
423  *
424  * ThinkPad IDs and versions seen in the field so far
425  * are two-characters from the set [0-9A-Z], i.e. base 36.
426  *
427  * We use values well outside that range as specials.
428  */
429
430 #define TPACPI_MATCH_ANY                0xffffU
431 #define TPACPI_MATCH_UNKNOWN            0U
432
433 /* TPID('1', 'Y') == 0x5931 */
434 #define TPID(__c1, __c2) (((__c2) << 8) | (__c1))
435
436 #define TPACPI_Q_IBM(__id1, __id2, __quirk)     \
437         { .vendor = PCI_VENDOR_ID_IBM,          \
438           .bios = TPID(__id1, __id2),           \
439           .ec = TPACPI_MATCH_ANY,               \
440           .quirks = (__quirk) }
441
442 #define TPACPI_Q_LNV(__id1, __id2, __quirk)     \
443         { .vendor = PCI_VENDOR_ID_LENOVO,       \
444           .bios = TPID(__id1, __id2),           \
445           .ec = TPACPI_MATCH_ANY,               \
446           .quirks = (__quirk) }
447
448 #define TPACPI_QEC_LNV(__id1, __id2, __quirk)   \
449         { .vendor = PCI_VENDOR_ID_LENOVO,       \
450           .bios = TPACPI_MATCH_ANY,             \
451           .ec = TPID(__id1, __id2),             \
452           .quirks = (__quirk) }
453
454 struct tpacpi_quirk {
455         unsigned int vendor;
456         u16 bios;
457         u16 ec;
458         unsigned long quirks;
459 };
460
461 /**
462  * tpacpi_check_quirks() - search BIOS/EC version on a list
463  * @qlist:              array of &struct tpacpi_quirk
464  * @qlist_size:         number of elements in @qlist
465  *
466  * Iterates over a quirks list until one is found that matches the
467  * ThinkPad's vendor, BIOS and EC model.
468  *
469  * Returns 0 if nothing matches, otherwise returns the quirks field of
470  * the matching &struct tpacpi_quirk entry.
471  *
472  * The match criteria is: vendor, ec and bios much match.
473  */
474 static unsigned long __init tpacpi_check_quirks(
475                         const struct tpacpi_quirk *qlist,
476                         unsigned int qlist_size)
477 {
478         while (qlist_size) {
479                 if ((qlist->vendor == thinkpad_id.vendor ||
480                                 qlist->vendor == TPACPI_MATCH_ANY) &&
481                     (qlist->bios == thinkpad_id.bios_model ||
482                                 qlist->bios == TPACPI_MATCH_ANY) &&
483                     (qlist->ec == thinkpad_id.ec_model ||
484                                 qlist->ec == TPACPI_MATCH_ANY))
485                         return qlist->quirks;
486
487                 qlist_size--;
488                 qlist++;
489         }
490         return 0;
491 }
492
493 static inline bool __pure __init tpacpi_is_lenovo(void)
494 {
495         return thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO;
496 }
497
498 static inline bool __pure __init tpacpi_is_ibm(void)
499 {
500         return thinkpad_id.vendor == PCI_VENDOR_ID_IBM;
501 }
502
503 /****************************************************************************
504  ****************************************************************************
505  *
506  * ACPI Helpers and device model
507  *
508  ****************************************************************************
509  ****************************************************************************/
510
511 /*************************************************************************
512  * ACPI basic handles
513  */
514
515 static acpi_handle root_handle;
516 static acpi_handle ec_handle;
517
518 #define TPACPI_HANDLE(object, parent, paths...)                 \
519         static acpi_handle  object##_handle;                    \
520         static const acpi_handle *object##_parent __initdata =  \
521                                                 &parent##_handle; \
522         static char *object##_paths[] __initdata = { paths }
523
524 TPACPI_HANDLE(ecrd, ec, "ECRD");        /* 570 */
525 TPACPI_HANDLE(ecwr, ec, "ECWR");        /* 570 */
526
527 TPACPI_HANDLE(cmos, root, "\\UCMS",     /* R50, R50e, R50p, R51, */
528                                         /* T4x, X31, X40 */
529            "\\CMOS",            /* A3x, G4x, R32, T23, T30, X22-24, X30 */
530            "\\CMS",             /* R40, R40e */
531            );                   /* all others */
532
533 TPACPI_HANDLE(hkey, ec, "\\_SB.HKEY",   /* 600e/x, 770e, 770x */
534            "^HKEY",             /* R30, R31 */
535            "HKEY",              /* all others */
536            );                   /* 570 */
537
538 TPACPI_HANDLE(vid, root, "\\_SB.PCI.AGP.VGA",   /* 570 */
539            "\\_SB.PCI0.AGP0.VID0",      /* 600e/x, 770x */
540            "\\_SB.PCI0.VID0",   /* 770e */
541            "\\_SB.PCI0.VID",    /* A21e, G4x, R50e, X30, X40 */
542            "\\_SB.PCI0.AGP.VGA",        /* X100e and a few others */
543            "\\_SB.PCI0.AGP.VID",        /* all others */
544            );                           /* R30, R31 */
545
546
547 /*************************************************************************
548  * ACPI helpers
549  */
550
551 static int acpi_evalf(acpi_handle handle,
552                       void *res, char *method, char *fmt, ...)
553 {
554         char *fmt0 = fmt;
555         struct acpi_object_list params;
556         union acpi_object in_objs[TPACPI_MAX_ACPI_ARGS];
557         struct acpi_buffer result, *resultp;
558         union acpi_object out_obj;
559         acpi_status status;
560         va_list ap;
561         char res_type;
562         int success;
563         int quiet;
564
565         if (!*fmt) {
566                 printk(TPACPI_ERR "acpi_evalf() called with empty format\n");
567                 return 0;
568         }
569
570         if (*fmt == 'q') {
571                 quiet = 1;
572                 fmt++;
573         } else
574                 quiet = 0;
575
576         res_type = *(fmt++);
577
578         params.count = 0;
579         params.pointer = &in_objs[0];
580
581         va_start(ap, fmt);
582         while (*fmt) {
583                 char c = *(fmt++);
584                 switch (c) {
585                 case 'd':       /* int */
586                         in_objs[params.count].integer.value = va_arg(ap, int);
587                         in_objs[params.count++].type = ACPI_TYPE_INTEGER;
588                         break;
589                         /* add more types as needed */
590                 default:
591                         printk(TPACPI_ERR "acpi_evalf() called "
592                                "with invalid format character '%c'\n", c);
593                         va_end(ap);
594                         return 0;
595                 }
596         }
597         va_end(ap);
598
599         if (res_type != 'v') {
600                 result.length = sizeof(out_obj);
601                 result.pointer = &out_obj;
602                 resultp = &result;
603         } else
604                 resultp = NULL;
605
606         status = acpi_evaluate_object(handle, method, &params, resultp);
607
608         switch (res_type) {
609         case 'd':               /* int */
610                 success = (status == AE_OK &&
611                            out_obj.type == ACPI_TYPE_INTEGER);
612                 if (success && res)
613                         *(int *)res = out_obj.integer.value;
614                 break;
615         case 'v':               /* void */
616                 success = status == AE_OK;
617                 break;
618                 /* add more types as needed */
619         default:
620                 printk(TPACPI_ERR "acpi_evalf() called "
621                        "with invalid format character '%c'\n", res_type);
622                 return 0;
623         }
624
625         if (!success && !quiet)
626                 printk(TPACPI_ERR "acpi_evalf(%s, %s, ...) failed: %s\n",
627                        method, fmt0, acpi_format_exception(status));
628
629         return success;
630 }
631
632 static int acpi_ec_read(int i, u8 *p)
633 {
634         int v;
635
636         if (ecrd_handle) {
637                 if (!acpi_evalf(ecrd_handle, &v, NULL, "dd", i))
638                         return 0;
639                 *p = v;
640         } else {
641                 if (ec_read(i, p) < 0)
642                         return 0;
643         }
644
645         return 1;
646 }
647
648 static int acpi_ec_write(int i, u8 v)
649 {
650         if (ecwr_handle) {
651                 if (!acpi_evalf(ecwr_handle, NULL, NULL, "vdd", i, v))
652                         return 0;
653         } else {
654                 if (ec_write(i, v) < 0)
655                         return 0;
656         }
657
658         return 1;
659 }
660
661 static int issue_thinkpad_cmos_command(int cmos_cmd)
662 {
663         if (!cmos_handle)
664                 return -ENXIO;
665
666         if (!acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd))
667                 return -EIO;
668
669         return 0;
670 }
671
672 /*************************************************************************
673  * ACPI device model
674  */
675
676 #define TPACPI_ACPIHANDLE_INIT(object) \
677         drv_acpi_handle_init(#object, &object##_handle, *object##_parent, \
678                 object##_paths, ARRAY_SIZE(object##_paths))
679
680 static void __init drv_acpi_handle_init(const char *name,
681                            acpi_handle *handle, const acpi_handle parent,
682                            char **paths, const int num_paths)
683 {
684         int i;
685         acpi_status status;
686
687         vdbg_printk(TPACPI_DBG_INIT, "trying to locate ACPI handle for %s\n",
688                 name);
689
690         for (i = 0; i < num_paths; i++) {
691                 status = acpi_get_handle(parent, paths[i], handle);
692                 if (ACPI_SUCCESS(status)) {
693                         dbg_printk(TPACPI_DBG_INIT,
694                                    "Found ACPI handle %s for %s\n",
695                                    paths[i], name);
696                         return;
697                 }
698         }
699
700         vdbg_printk(TPACPI_DBG_INIT, "ACPI handle for %s not found\n",
701                     name);
702         *handle = NULL;
703 }
704
705 static acpi_status __init tpacpi_acpi_handle_locate_callback(acpi_handle handle,
706                         u32 level, void *context, void **return_value)
707 {
708         *(acpi_handle *)return_value = handle;
709
710         return AE_CTRL_TERMINATE;
711 }
712
713 static void __init tpacpi_acpi_handle_locate(const char *name,
714                 const char *hid,
715                 acpi_handle *handle)
716 {
717         acpi_status status;
718         acpi_handle device_found;
719
720         BUG_ON(!name || !hid || !handle);
721         vdbg_printk(TPACPI_DBG_INIT,
722                         "trying to locate ACPI handle for %s, using HID %s\n",
723                         name, hid);
724
725         memset(&device_found, 0, sizeof(device_found));
726         status = acpi_get_devices(hid, tpacpi_acpi_handle_locate_callback,
727                                   (void *)name, &device_found);
728
729         *handle = NULL;
730
731         if (ACPI_SUCCESS(status)) {
732                 *handle = device_found;
733                 dbg_printk(TPACPI_DBG_INIT,
734                            "Found ACPI handle for %s\n", name);
735         } else {
736                 vdbg_printk(TPACPI_DBG_INIT,
737                             "Could not locate an ACPI handle for %s: %s\n",
738                             name, acpi_format_exception(status));
739         }
740 }
741
742 static void dispatch_acpi_notify(acpi_handle handle, u32 event, void *data)
743 {
744         struct ibm_struct *ibm = data;
745
746         if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
747                 return;
748
749         if (!ibm || !ibm->acpi || !ibm->acpi->notify)
750                 return;
751
752         ibm->acpi->notify(ibm, event);
753 }
754
755 static int __init setup_acpi_notify(struct ibm_struct *ibm)
756 {
757         acpi_status status;
758         int rc;
759
760         BUG_ON(!ibm->acpi);
761
762         if (!*ibm->acpi->handle)
763                 return 0;
764
765         vdbg_printk(TPACPI_DBG_INIT,
766                 "setting up ACPI notify for %s\n", ibm->name);
767
768         rc = acpi_bus_get_device(*ibm->acpi->handle, &ibm->acpi->device);
769         if (rc < 0) {
770                 printk(TPACPI_ERR "acpi_bus_get_device(%s) failed: %d\n",
771                         ibm->name, rc);
772                 return -ENODEV;
773         }
774
775         ibm->acpi->device->driver_data = ibm;
776         sprintf(acpi_device_class(ibm->acpi->device), "%s/%s",
777                 TPACPI_ACPI_EVENT_PREFIX,
778                 ibm->name);
779
780         status = acpi_install_notify_handler(*ibm->acpi->handle,
781                         ibm->acpi->type, dispatch_acpi_notify, ibm);
782         if (ACPI_FAILURE(status)) {
783                 if (status == AE_ALREADY_EXISTS) {
784                         printk(TPACPI_NOTICE
785                                "another device driver is already "
786                                "handling %s events\n", ibm->name);
787                 } else {
788                         printk(TPACPI_ERR
789                                "acpi_install_notify_handler(%s) failed: %s\n",
790                                ibm->name, acpi_format_exception(status));
791                 }
792                 return -ENODEV;
793         }
794         ibm->flags.acpi_notify_installed = 1;
795         return 0;
796 }
797
798 static int __init tpacpi_device_add(struct acpi_device *device)
799 {
800         return 0;
801 }
802
803 static int __init register_tpacpi_subdriver(struct ibm_struct *ibm)
804 {
805         int rc;
806
807         dbg_printk(TPACPI_DBG_INIT,
808                 "registering %s as an ACPI driver\n", ibm->name);
809
810         BUG_ON(!ibm->acpi);
811
812         ibm->acpi->driver = kzalloc(sizeof(struct acpi_driver), GFP_KERNEL);
813         if (!ibm->acpi->driver) {
814                 printk(TPACPI_ERR
815                        "failed to allocate memory for ibm->acpi->driver\n");
816                 return -ENOMEM;
817         }
818
819         sprintf(ibm->acpi->driver->name, "%s_%s", TPACPI_NAME, ibm->name);
820         ibm->acpi->driver->ids = ibm->acpi->hid;
821
822         ibm->acpi->driver->ops.add = &tpacpi_device_add;
823
824         rc = acpi_bus_register_driver(ibm->acpi->driver);
825         if (rc < 0) {
826                 printk(TPACPI_ERR "acpi_bus_register_driver(%s) failed: %d\n",
827                        ibm->name, rc);
828                 kfree(ibm->acpi->driver);
829                 ibm->acpi->driver = NULL;
830         } else if (!rc)
831                 ibm->flags.acpi_driver_registered = 1;
832
833         return rc;
834 }
835
836
837 /****************************************************************************
838  ****************************************************************************
839  *
840  * Procfs Helpers
841  *
842  ****************************************************************************
843  ****************************************************************************/
844
845 static int dispatch_proc_show(struct seq_file *m, void *v)
846 {
847         struct ibm_struct *ibm = m->private;
848
849         if (!ibm || !ibm->read)
850                 return -EINVAL;
851         return ibm->read(m);
852 }
853
854 static int dispatch_proc_open(struct inode *inode, struct file *file)
855 {
856         return single_open(file, dispatch_proc_show, PDE(inode)->data);
857 }
858
859 static ssize_t dispatch_proc_write(struct file *file,
860                         const char __user *userbuf,
861                         size_t count, loff_t *pos)
862 {
863         struct ibm_struct *ibm = PDE(file->f_path.dentry->d_inode)->data;
864         char *kernbuf;
865         int ret;
866
867         if (!ibm || !ibm->write)
868                 return -EINVAL;
869         if (count > PAGE_SIZE - 2)
870                 return -EINVAL;
871
872         kernbuf = kmalloc(count + 2, GFP_KERNEL);
873         if (!kernbuf)
874                 return -ENOMEM;
875
876         if (copy_from_user(kernbuf, userbuf, count)) {
877                 kfree(kernbuf);
878                 return -EFAULT;
879         }
880
881         kernbuf[count] = 0;
882         strcat(kernbuf, ",");
883         ret = ibm->write(kernbuf);
884         if (ret == 0)
885                 ret = count;
886
887         kfree(kernbuf);
888
889         return ret;
890 }
891
892 static const struct file_operations dispatch_proc_fops = {
893         .owner          = THIS_MODULE,
894         .open           = dispatch_proc_open,
895         .read           = seq_read,
896         .llseek         = seq_lseek,
897         .release        = single_release,
898         .write          = dispatch_proc_write,
899 };
900
901 static char *next_cmd(char **cmds)
902 {
903         char *start = *cmds;
904         char *end;
905
906         while ((end = strchr(start, ',')) && end == start)
907                 start = end + 1;
908
909         if (!end)
910                 return NULL;
911
912         *end = 0;
913         *cmds = end + 1;
914         return start;
915 }
916
917
918 /****************************************************************************
919  ****************************************************************************
920  *
921  * Device model: input, hwmon and platform
922  *
923  ****************************************************************************
924  ****************************************************************************/
925
926 static struct platform_device *tpacpi_pdev;
927 static struct platform_device *tpacpi_sensors_pdev;
928 static struct device *tpacpi_hwmon;
929 static struct input_dev *tpacpi_inputdev;
930 static struct mutex tpacpi_inputdev_send_mutex;
931 static LIST_HEAD(tpacpi_all_drivers);
932
933 static int tpacpi_suspend_handler(struct platform_device *pdev,
934                                   pm_message_t state)
935 {
936         struct ibm_struct *ibm, *itmp;
937
938         list_for_each_entry_safe(ibm, itmp,
939                                  &tpacpi_all_drivers,
940                                  all_drivers) {
941                 if (ibm->suspend)
942                         (ibm->suspend)(state);
943         }
944
945         return 0;
946 }
947
948 static int tpacpi_resume_handler(struct platform_device *pdev)
949 {
950         struct ibm_struct *ibm, *itmp;
951
952         list_for_each_entry_safe(ibm, itmp,
953                                  &tpacpi_all_drivers,
954                                  all_drivers) {
955                 if (ibm->resume)
956                         (ibm->resume)();
957         }
958
959         return 0;
960 }
961
962 static void tpacpi_shutdown_handler(struct platform_device *pdev)
963 {
964         struct ibm_struct *ibm, *itmp;
965
966         list_for_each_entry_safe(ibm, itmp,
967                                  &tpacpi_all_drivers,
968                                  all_drivers) {
969                 if (ibm->shutdown)
970                         (ibm->shutdown)();
971         }
972 }
973
974 static struct platform_driver tpacpi_pdriver = {
975         .driver = {
976                 .name = TPACPI_DRVR_NAME,
977                 .owner = THIS_MODULE,
978         },
979         .suspend = tpacpi_suspend_handler,
980         .resume = tpacpi_resume_handler,
981         .shutdown = tpacpi_shutdown_handler,
982 };
983
984 static struct platform_driver tpacpi_hwmon_pdriver = {
985         .driver = {
986                 .name = TPACPI_HWMON_DRVR_NAME,
987                 .owner = THIS_MODULE,
988         },
989 };
990
991 /*************************************************************************
992  * sysfs support helpers
993  */
994
995 struct attribute_set {
996         unsigned int members, max_members;
997         struct attribute_group group;
998 };
999
1000 struct attribute_set_obj {
1001         struct attribute_set s;
1002         struct attribute *a;
1003 } __attribute__((packed));
1004
1005 static struct attribute_set *create_attr_set(unsigned int max_members,
1006                                                 const char *name)
1007 {
1008         struct attribute_set_obj *sobj;
1009
1010         if (max_members == 0)
1011                 return NULL;
1012
1013         /* Allocates space for implicit NULL at the end too */
1014         sobj = kzalloc(sizeof(struct attribute_set_obj) +
1015                     max_members * sizeof(struct attribute *),
1016                     GFP_KERNEL);
1017         if (!sobj)
1018                 return NULL;
1019         sobj->s.max_members = max_members;
1020         sobj->s.group.attrs = &sobj->a;
1021         sobj->s.group.name = name;
1022
1023         return &sobj->s;
1024 }
1025
1026 #define destroy_attr_set(_set) \
1027         kfree(_set);
1028
1029 /* not multi-threaded safe, use it in a single thread per set */
1030 static int add_to_attr_set(struct attribute_set *s, struct attribute *attr)
1031 {
1032         if (!s || !attr)
1033                 return -EINVAL;
1034
1035         if (s->members >= s->max_members)
1036                 return -ENOMEM;
1037
1038         s->group.attrs[s->members] = attr;
1039         s->members++;
1040
1041         return 0;
1042 }
1043
1044 static int add_many_to_attr_set(struct attribute_set *s,
1045                         struct attribute **attr,
1046                         unsigned int count)
1047 {
1048         int i, res;
1049
1050         for (i = 0; i < count; i++) {
1051                 res = add_to_attr_set(s, attr[i]);
1052                 if (res)
1053                         return res;
1054         }
1055
1056         return 0;
1057 }
1058
1059 static void delete_attr_set(struct attribute_set *s, struct kobject *kobj)
1060 {
1061         sysfs_remove_group(kobj, &s->group);
1062         destroy_attr_set(s);
1063 }
1064
1065 #define register_attr_set_with_sysfs(_attr_set, _kobj) \
1066         sysfs_create_group(_kobj, &_attr_set->group)
1067
1068 static int parse_strtoul(const char *buf,
1069                 unsigned long max, unsigned long *value)
1070 {
1071         char *endp;
1072
1073         *value = simple_strtoul(skip_spaces(buf), &endp, 0);
1074         endp = skip_spaces(endp);
1075         if (*endp || *value > max)
1076                 return -EINVAL;
1077
1078         return 0;
1079 }
1080
1081 static void tpacpi_disable_brightness_delay(void)
1082 {
1083         if (acpi_evalf(hkey_handle, NULL, "PWMS", "qvd", 0))
1084                 printk(TPACPI_NOTICE
1085                         "ACPI backlight control delay disabled\n");
1086 }
1087
1088 static void printk_deprecated_attribute(const char * const what,
1089                                         const char * const details)
1090 {
1091         tpacpi_log_usertask("deprecated sysfs attribute");
1092         printk(TPACPI_WARN "WARNING: sysfs attribute %s is deprecated and "
1093                 "will be removed. %s\n",
1094                 what, details);
1095 }
1096
1097 /*************************************************************************
1098  * rfkill and radio control support helpers
1099  */
1100
1101 /*
1102  * ThinkPad-ACPI firmware handling model:
1103  *
1104  * WLSW (master wireless switch) is event-driven, and is common to all
1105  * firmware-controlled radios.  It cannot be controlled, just monitored,
1106  * as expected.  It overrides all radio state in firmware
1107  *
1108  * The kernel, a masked-off hotkey, and WLSW can change the radio state
1109  * (TODO: verify how WLSW interacts with the returned radio state).
1110  *
1111  * The only time there are shadow radio state changes, is when
1112  * masked-off hotkeys are used.
1113  */
1114
1115 /*
1116  * Internal driver API for radio state:
1117  *
1118  * int: < 0 = error, otherwise enum tpacpi_rfkill_state
1119  * bool: true means radio blocked (off)
1120  */
1121 enum tpacpi_rfkill_state {
1122         TPACPI_RFK_RADIO_OFF = 0,
1123         TPACPI_RFK_RADIO_ON
1124 };
1125
1126 /* rfkill switches */
1127 enum tpacpi_rfk_id {
1128         TPACPI_RFK_BLUETOOTH_SW_ID = 0,
1129         TPACPI_RFK_WWAN_SW_ID,
1130         TPACPI_RFK_UWB_SW_ID,
1131         TPACPI_RFK_SW_MAX
1132 };
1133
1134 static const char *tpacpi_rfkill_names[] = {
1135         [TPACPI_RFK_BLUETOOTH_SW_ID] = "bluetooth",
1136         [TPACPI_RFK_WWAN_SW_ID] = "wwan",
1137         [TPACPI_RFK_UWB_SW_ID] = "uwb",
1138         [TPACPI_RFK_SW_MAX] = NULL
1139 };
1140
1141 /* ThinkPad-ACPI rfkill subdriver */
1142 struct tpacpi_rfk {
1143         struct rfkill *rfkill;
1144         enum tpacpi_rfk_id id;
1145         const struct tpacpi_rfk_ops *ops;
1146 };
1147
1148 struct tpacpi_rfk_ops {
1149         /* firmware interface */
1150         int (*get_status)(void);
1151         int (*set_status)(const enum tpacpi_rfkill_state);
1152 };
1153
1154 static struct tpacpi_rfk *tpacpi_rfkill_switches[TPACPI_RFK_SW_MAX];
1155
1156 /* Query FW and update rfkill sw state for a given rfkill switch */
1157 static int tpacpi_rfk_update_swstate(const struct tpacpi_rfk *tp_rfk)
1158 {
1159         int status;
1160
1161         if (!tp_rfk)
1162                 return -ENODEV;
1163
1164         status = (tp_rfk->ops->get_status)();
1165         if (status < 0)
1166                 return status;
1167
1168         rfkill_set_sw_state(tp_rfk->rfkill,
1169                             (status == TPACPI_RFK_RADIO_OFF));
1170
1171         return status;
1172 }
1173
1174 /* Query FW and update rfkill sw state for all rfkill switches */
1175 static void tpacpi_rfk_update_swstate_all(void)
1176 {
1177         unsigned int i;
1178
1179         for (i = 0; i < TPACPI_RFK_SW_MAX; i++)
1180                 tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[i]);
1181 }
1182
1183 /*
1184  * Sync the HW-blocking state of all rfkill switches,
1185  * do notice it causes the rfkill core to schedule uevents
1186  */
1187 static void tpacpi_rfk_update_hwblock_state(bool blocked)
1188 {
1189         unsigned int i;
1190         struct tpacpi_rfk *tp_rfk;
1191
1192         for (i = 0; i < TPACPI_RFK_SW_MAX; i++) {
1193                 tp_rfk = tpacpi_rfkill_switches[i];
1194                 if (tp_rfk) {
1195                         if (rfkill_set_hw_state(tp_rfk->rfkill,
1196                                                 blocked)) {
1197                                 /* ignore -- we track sw block */
1198                         }
1199                 }
1200         }
1201 }
1202
1203 /* Call to get the WLSW state from the firmware */
1204 static int hotkey_get_wlsw(void);
1205
1206 /* Call to query WLSW state and update all rfkill switches */
1207 static bool tpacpi_rfk_check_hwblock_state(void)
1208 {
1209         int res = hotkey_get_wlsw();
1210         int hw_blocked;
1211
1212         /* When unknown or unsupported, we have to assume it is unblocked */
1213         if (res < 0)
1214                 return false;
1215
1216         hw_blocked = (res == TPACPI_RFK_RADIO_OFF);
1217         tpacpi_rfk_update_hwblock_state(hw_blocked);
1218
1219         return hw_blocked;
1220 }
1221
1222 static int tpacpi_rfk_hook_set_block(void *data, bool blocked)
1223 {
1224         struct tpacpi_rfk *tp_rfk = data;
1225         int res;
1226
1227         dbg_printk(TPACPI_DBG_RFKILL,
1228                    "request to change radio state to %s\n",
1229                    blocked ? "blocked" : "unblocked");
1230
1231         /* try to set radio state */
1232         res = (tp_rfk->ops->set_status)(blocked ?
1233                                 TPACPI_RFK_RADIO_OFF : TPACPI_RFK_RADIO_ON);
1234
1235         /* and update the rfkill core with whatever the FW really did */
1236         tpacpi_rfk_update_swstate(tp_rfk);
1237
1238         return (res < 0) ? res : 0;
1239 }
1240
1241 static const struct rfkill_ops tpacpi_rfk_rfkill_ops = {
1242         .set_block = tpacpi_rfk_hook_set_block,
1243 };
1244
1245 static int __init tpacpi_new_rfkill(const enum tpacpi_rfk_id id,
1246                         const struct tpacpi_rfk_ops *tp_rfkops,
1247                         const enum rfkill_type rfktype,
1248                         const char *name,
1249                         const bool set_default)
1250 {
1251         struct tpacpi_rfk *atp_rfk;
1252         int res;
1253         bool sw_state = false;
1254         bool hw_state;
1255         int sw_status;
1256
1257         BUG_ON(id >= TPACPI_RFK_SW_MAX || tpacpi_rfkill_switches[id]);
1258
1259         atp_rfk = kzalloc(sizeof(struct tpacpi_rfk), GFP_KERNEL);
1260         if (atp_rfk)
1261                 atp_rfk->rfkill = rfkill_alloc(name,
1262                                                 &tpacpi_pdev->dev,
1263                                                 rfktype,
1264                                                 &tpacpi_rfk_rfkill_ops,
1265                                                 atp_rfk);
1266         if (!atp_rfk || !atp_rfk->rfkill) {
1267                 printk(TPACPI_ERR
1268                         "failed to allocate memory for rfkill class\n");
1269                 kfree(atp_rfk);
1270                 return -ENOMEM;
1271         }
1272
1273         atp_rfk->id = id;
1274         atp_rfk->ops = tp_rfkops;
1275
1276         sw_status = (tp_rfkops->get_status)();
1277         if (sw_status < 0) {
1278                 printk(TPACPI_ERR
1279                         "failed to read initial state for %s, error %d\n",
1280                         name, sw_status);
1281         } else {
1282                 sw_state = (sw_status == TPACPI_RFK_RADIO_OFF);
1283                 if (set_default) {
1284                         /* try to keep the initial state, since we ask the
1285                          * firmware to preserve it across S5 in NVRAM */
1286                         rfkill_init_sw_state(atp_rfk->rfkill, sw_state);
1287                 }
1288         }
1289         hw_state = tpacpi_rfk_check_hwblock_state();
1290         rfkill_set_hw_state(atp_rfk->rfkill, hw_state);
1291
1292         res = rfkill_register(atp_rfk->rfkill);
1293         if (res < 0) {
1294                 printk(TPACPI_ERR
1295                         "failed to register %s rfkill switch: %d\n",
1296                         name, res);
1297                 rfkill_destroy(atp_rfk->rfkill);
1298                 kfree(atp_rfk);
1299                 return res;
1300         }
1301
1302         tpacpi_rfkill_switches[id] = atp_rfk;
1303
1304         printk(TPACPI_INFO "rfkill switch %s: radio is %sblocked\n",
1305                 name, (sw_state || hw_state) ? "" : "un");
1306         return 0;
1307 }
1308
1309 static void tpacpi_destroy_rfkill(const enum tpacpi_rfk_id id)
1310 {
1311         struct tpacpi_rfk *tp_rfk;
1312
1313         BUG_ON(id >= TPACPI_RFK_SW_MAX);
1314
1315         tp_rfk = tpacpi_rfkill_switches[id];
1316         if (tp_rfk) {
1317                 rfkill_unregister(tp_rfk->rfkill);
1318                 rfkill_destroy(tp_rfk->rfkill);
1319                 tpacpi_rfkill_switches[id] = NULL;
1320                 kfree(tp_rfk);
1321         }
1322 }
1323
1324 static void printk_deprecated_rfkill_attribute(const char * const what)
1325 {
1326         printk_deprecated_attribute(what,
1327                         "Please switch to generic rfkill before year 2010");
1328 }
1329
1330 /* sysfs <radio> enable ------------------------------------------------ */
1331 static ssize_t tpacpi_rfk_sysfs_enable_show(const enum tpacpi_rfk_id id,
1332                                             struct device_attribute *attr,
1333                                             char *buf)
1334 {
1335         int status;
1336
1337         printk_deprecated_rfkill_attribute(attr->attr.name);
1338
1339         /* This is in the ABI... */
1340         if (tpacpi_rfk_check_hwblock_state()) {
1341                 status = TPACPI_RFK_RADIO_OFF;
1342         } else {
1343                 status = tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]);
1344                 if (status < 0)
1345                         return status;
1346         }
1347
1348         return snprintf(buf, PAGE_SIZE, "%d\n",
1349                         (status == TPACPI_RFK_RADIO_ON) ? 1 : 0);
1350 }
1351
1352 static ssize_t tpacpi_rfk_sysfs_enable_store(const enum tpacpi_rfk_id id,
1353                             struct device_attribute *attr,
1354                             const char *buf, size_t count)
1355 {
1356         unsigned long t;
1357         int res;
1358
1359         printk_deprecated_rfkill_attribute(attr->attr.name);
1360
1361         if (parse_strtoul(buf, 1, &t))
1362                 return -EINVAL;
1363
1364         tpacpi_disclose_usertask(attr->attr.name, "set to %ld\n", t);
1365
1366         /* This is in the ABI... */
1367         if (tpacpi_rfk_check_hwblock_state() && !!t)
1368                 return -EPERM;
1369
1370         res = tpacpi_rfkill_switches[id]->ops->set_status((!!t) ?
1371                                 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF);
1372         tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]);
1373
1374         return (res < 0) ? res : count;
1375 }
1376
1377 /* procfs -------------------------------------------------------------- */
1378 static int tpacpi_rfk_procfs_read(const enum tpacpi_rfk_id id, struct seq_file *m)
1379 {
1380         if (id >= TPACPI_RFK_SW_MAX)
1381                 seq_printf(m, "status:\t\tnot supported\n");
1382         else {
1383                 int status;
1384
1385                 /* This is in the ABI... */
1386                 if (tpacpi_rfk_check_hwblock_state()) {
1387                         status = TPACPI_RFK_RADIO_OFF;
1388                 } else {
1389                         status = tpacpi_rfk_update_swstate(
1390                                                 tpacpi_rfkill_switches[id]);
1391                         if (status < 0)
1392                                 return status;
1393                 }
1394
1395                 seq_printf(m, "status:\t\t%s\n",
1396                                 (status == TPACPI_RFK_RADIO_ON) ?
1397                                         "enabled" : "disabled");
1398                 seq_printf(m, "commands:\tenable, disable\n");
1399         }
1400
1401         return 0;
1402 }
1403
1404 static int tpacpi_rfk_procfs_write(const enum tpacpi_rfk_id id, char *buf)
1405 {
1406         char *cmd;
1407         int status = -1;
1408         int res = 0;
1409
1410         if (id >= TPACPI_RFK_SW_MAX)
1411                 return -ENODEV;
1412
1413         while ((cmd = next_cmd(&buf))) {
1414                 if (strlencmp(cmd, "enable") == 0)
1415                         status = TPACPI_RFK_RADIO_ON;
1416                 else if (strlencmp(cmd, "disable") == 0)
1417                         status = TPACPI_RFK_RADIO_OFF;
1418                 else
1419                         return -EINVAL;
1420         }
1421
1422         if (status != -1) {
1423                 tpacpi_disclose_usertask("procfs", "attempt to %s %s\n",
1424                                 (status == TPACPI_RFK_RADIO_ON) ?
1425                                                 "enable" : "disable",
1426                                 tpacpi_rfkill_names[id]);
1427                 res = (tpacpi_rfkill_switches[id]->ops->set_status)(status);
1428                 tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]);
1429         }
1430
1431         return res;
1432 }
1433
1434 /*************************************************************************
1435  * thinkpad-acpi driver attributes
1436  */
1437
1438 /* interface_version --------------------------------------------------- */
1439 static ssize_t tpacpi_driver_interface_version_show(
1440                                 struct device_driver *drv,
1441                                 char *buf)
1442 {
1443         return snprintf(buf, PAGE_SIZE, "0x%08x\n", TPACPI_SYSFS_VERSION);
1444 }
1445
1446 static DRIVER_ATTR(interface_version, S_IRUGO,
1447                 tpacpi_driver_interface_version_show, NULL);
1448
1449 /* debug_level --------------------------------------------------------- */
1450 static ssize_t tpacpi_driver_debug_show(struct device_driver *drv,
1451                                                 char *buf)
1452 {
1453         return snprintf(buf, PAGE_SIZE, "0x%04x\n", dbg_level);
1454 }
1455
1456 static ssize_t tpacpi_driver_debug_store(struct device_driver *drv,
1457                                                 const char *buf, size_t count)
1458 {
1459         unsigned long t;
1460
1461         if (parse_strtoul(buf, 0xffff, &t))
1462                 return -EINVAL;
1463
1464         dbg_level = t;
1465
1466         return count;
1467 }
1468
1469 static DRIVER_ATTR(debug_level, S_IWUSR | S_IRUGO,
1470                 tpacpi_driver_debug_show, tpacpi_driver_debug_store);
1471
1472 /* version ------------------------------------------------------------- */
1473 static ssize_t tpacpi_driver_version_show(struct device_driver *drv,
1474                                                 char *buf)
1475 {
1476         return snprintf(buf, PAGE_SIZE, "%s v%s\n",
1477                         TPACPI_DESC, TPACPI_VERSION);
1478 }
1479
1480 static DRIVER_ATTR(version, S_IRUGO,
1481                 tpacpi_driver_version_show, NULL);
1482
1483 /* --------------------------------------------------------------------- */
1484
1485 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
1486
1487 /* wlsw_emulstate ------------------------------------------------------ */
1488 static ssize_t tpacpi_driver_wlsw_emulstate_show(struct device_driver *drv,
1489                                                 char *buf)
1490 {
1491         return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_wlsw_emulstate);
1492 }
1493
1494 static ssize_t tpacpi_driver_wlsw_emulstate_store(struct device_driver *drv,
1495                                                 const char *buf, size_t count)
1496 {
1497         unsigned long t;
1498
1499         if (parse_strtoul(buf, 1, &t))
1500                 return -EINVAL;
1501
1502         if (tpacpi_wlsw_emulstate != !!t) {
1503                 tpacpi_wlsw_emulstate = !!t;
1504                 tpacpi_rfk_update_hwblock_state(!t);    /* negative logic */
1505         }
1506
1507         return count;
1508 }
1509
1510 static DRIVER_ATTR(wlsw_emulstate, S_IWUSR | S_IRUGO,
1511                 tpacpi_driver_wlsw_emulstate_show,
1512                 tpacpi_driver_wlsw_emulstate_store);
1513
1514 /* bluetooth_emulstate ------------------------------------------------- */
1515 static ssize_t tpacpi_driver_bluetooth_emulstate_show(
1516                                         struct device_driver *drv,
1517                                         char *buf)
1518 {
1519         return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_bluetooth_emulstate);
1520 }
1521
1522 static ssize_t tpacpi_driver_bluetooth_emulstate_store(
1523                                         struct device_driver *drv,
1524                                         const char *buf, size_t count)
1525 {
1526         unsigned long t;
1527
1528         if (parse_strtoul(buf, 1, &t))
1529                 return -EINVAL;
1530
1531         tpacpi_bluetooth_emulstate = !!t;
1532
1533         return count;
1534 }
1535
1536 static DRIVER_ATTR(bluetooth_emulstate, S_IWUSR | S_IRUGO,
1537                 tpacpi_driver_bluetooth_emulstate_show,
1538                 tpacpi_driver_bluetooth_emulstate_store);
1539
1540 /* wwan_emulstate ------------------------------------------------- */
1541 static ssize_t tpacpi_driver_wwan_emulstate_show(
1542                                         struct device_driver *drv,
1543                                         char *buf)
1544 {
1545         return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_wwan_emulstate);
1546 }
1547
1548 static ssize_t tpacpi_driver_wwan_emulstate_store(
1549                                         struct device_driver *drv,
1550                                         const char *buf, size_t count)
1551 {
1552         unsigned long t;
1553
1554         if (parse_strtoul(buf, 1, &t))
1555                 return -EINVAL;
1556
1557         tpacpi_wwan_emulstate = !!t;
1558
1559         return count;
1560 }
1561
1562 static DRIVER_ATTR(wwan_emulstate, S_IWUSR | S_IRUGO,
1563                 tpacpi_driver_wwan_emulstate_show,
1564                 tpacpi_driver_wwan_emulstate_store);
1565
1566 /* uwb_emulstate ------------------------------------------------- */
1567 static ssize_t tpacpi_driver_uwb_emulstate_show(
1568                                         struct device_driver *drv,
1569                                         char *buf)
1570 {
1571         return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_uwb_emulstate);
1572 }
1573
1574 static ssize_t tpacpi_driver_uwb_emulstate_store(
1575                                         struct device_driver *drv,
1576                                         const char *buf, size_t count)
1577 {
1578         unsigned long t;
1579
1580         if (parse_strtoul(buf, 1, &t))
1581                 return -EINVAL;
1582
1583         tpacpi_uwb_emulstate = !!t;
1584
1585         return count;
1586 }
1587
1588 static DRIVER_ATTR(uwb_emulstate, S_IWUSR | S_IRUGO,
1589                 tpacpi_driver_uwb_emulstate_show,
1590                 tpacpi_driver_uwb_emulstate_store);
1591 #endif
1592
1593 /* --------------------------------------------------------------------- */
1594
1595 static struct driver_attribute *tpacpi_driver_attributes[] = {
1596         &driver_attr_debug_level, &driver_attr_version,
1597         &driver_attr_interface_version,
1598 };
1599
1600 static int __init tpacpi_create_driver_attributes(struct device_driver *drv)
1601 {
1602         int i, res;
1603
1604         i = 0;
1605         res = 0;
1606         while (!res && i < ARRAY_SIZE(tpacpi_driver_attributes)) {
1607                 res = driver_create_file(drv, tpacpi_driver_attributes[i]);
1608                 i++;
1609         }
1610
1611 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
1612         if (!res && dbg_wlswemul)
1613                 res = driver_create_file(drv, &driver_attr_wlsw_emulstate);
1614         if (!res && dbg_bluetoothemul)
1615                 res = driver_create_file(drv, &driver_attr_bluetooth_emulstate);
1616         if (!res && dbg_wwanemul)
1617                 res = driver_create_file(drv, &driver_attr_wwan_emulstate);
1618         if (!res && dbg_uwbemul)
1619                 res = driver_create_file(drv, &driver_attr_uwb_emulstate);
1620 #endif
1621
1622         return res;
1623 }
1624
1625 static void tpacpi_remove_driver_attributes(struct device_driver *drv)
1626 {
1627         int i;
1628
1629         for (i = 0; i < ARRAY_SIZE(tpacpi_driver_attributes); i++)
1630                 driver_remove_file(drv, tpacpi_driver_attributes[i]);
1631
1632 #ifdef THINKPAD_ACPI_DEBUGFACILITIES
1633         driver_remove_file(drv, &driver_attr_wlsw_emulstate);
1634         driver_remove_file(drv, &driver_attr_bluetooth_emulstate);
1635         driver_remove_file(drv, &driver_attr_wwan_emulstate);
1636         driver_remove_file(drv, &driver_attr_uwb_emulstate);
1637 #endif
1638 }
1639
1640 /*************************************************************************
1641  * Firmware Data
1642  */
1643
1644 /*
1645  * Table of recommended minimum BIOS versions
1646  *
1647  * Reasons for listing:
1648  *    1. Stable BIOS, listed because the unknown amount of
1649  *       bugs and bad ACPI behaviour on older versions
1650  *
1651  *    2. BIOS or EC fw with known bugs that trigger on Linux
1652  *
1653  *    3. BIOS with known reduced functionality in older versions
1654  *
1655  *  We recommend the latest BIOS and EC version.
1656  *  We only support the latest BIOS and EC fw version as a rule.
1657  *
1658  *  Sources: IBM ThinkPad Public Web Documents (update changelogs),
1659  *  Information from users in ThinkWiki
1660  *
1661  *  WARNING: we use this table also to detect that the machine is
1662  *  a ThinkPad in some cases, so don't remove entries lightly.
1663  */
1664
1665 #define TPV_Q(__v, __id1, __id2, __bv1, __bv2)          \
1666         { .vendor       = (__v),                        \
1667           .bios         = TPID(__id1, __id2),           \
1668           .ec           = TPACPI_MATCH_ANY,             \
1669           .quirks       = TPACPI_MATCH_ANY << 16        \
1670                           | (__bv1) << 8 | (__bv2) }
1671
1672 #define TPV_Q_X(__v, __bid1, __bid2, __bv1, __bv2,      \
1673                 __eid, __ev1, __ev2)                    \
1674         { .vendor       = (__v),                        \
1675           .bios         = TPID(__bid1, __bid2),         \
1676           .ec           = __eid,                        \
1677           .quirks       = (__ev1) << 24 | (__ev2) << 16 \
1678                           | (__bv1) << 8 | (__bv2) }
1679
1680 #define TPV_QI0(__id1, __id2, __bv1, __bv2) \
1681         TPV_Q(PCI_VENDOR_ID_IBM, __id1, __id2, __bv1, __bv2)
1682
1683 /* Outdated IBM BIOSes often lack the EC id string */
1684 #define TPV_QI1(__id1, __id2, __bv1, __bv2, __ev1, __ev2) \
1685         TPV_Q_X(PCI_VENDOR_ID_IBM, __id1, __id2,        \
1686                 __bv1, __bv2, TPID(__id1, __id2),       \
1687                 __ev1, __ev2),                          \
1688         TPV_Q_X(PCI_VENDOR_ID_IBM, __id1, __id2,        \
1689                 __bv1, __bv2, TPACPI_MATCH_UNKNOWN,     \
1690                 __ev1, __ev2)
1691
1692 /* Outdated IBM BIOSes often lack the EC id string */
1693 #define TPV_QI2(__bid1, __bid2, __bv1, __bv2,           \
1694                 __eid1, __eid2, __ev1, __ev2)           \
1695         TPV_Q_X(PCI_VENDOR_ID_IBM, __bid1, __bid2,      \
1696                 __bv1, __bv2, TPID(__eid1, __eid2),     \
1697                 __ev1, __ev2),                          \
1698         TPV_Q_X(PCI_VENDOR_ID_IBM, __bid1, __bid2,      \
1699                 __bv1, __bv2, TPACPI_MATCH_UNKNOWN,     \
1700                 __ev1, __ev2)
1701
1702 #define TPV_QL0(__id1, __id2, __bv1, __bv2) \
1703         TPV_Q(PCI_VENDOR_ID_LENOVO, __id1, __id2, __bv1, __bv2)
1704
1705 #define TPV_QL1(__id1, __id2, __bv1, __bv2, __ev1, __ev2) \
1706         TPV_Q_X(PCI_VENDOR_ID_LENOVO, __id1, __id2,     \
1707                 __bv1, __bv2, TPID(__id1, __id2),       \
1708                 __ev1, __ev2)
1709
1710 #define TPV_QL2(__bid1, __bid2, __bv1, __bv2,           \
1711                 __eid1, __eid2, __ev1, __ev2)           \
1712         TPV_Q_X(PCI_VENDOR_ID_LENOVO, __bid1, __bid2,   \
1713                 __bv1, __bv2, TPID(__eid1, __eid2),     \
1714                 __ev1, __ev2)
1715
1716 static const struct tpacpi_quirk tpacpi_bios_version_qtable[] __initconst = {
1717         /*  Numeric models ------------------ */
1718         /*      FW MODEL   BIOS VERS          */
1719         TPV_QI0('I', 'M',  '6', '5'),            /* 570 */
1720         TPV_QI0('I', 'U',  '2', '6'),            /* 570E */
1721         TPV_QI0('I', 'B',  '5', '4'),            /* 600 */
1722         TPV_QI0('I', 'H',  '4', '7'),            /* 600E */
1723         TPV_QI0('I', 'N',  '3', '6'),            /* 600E */
1724         TPV_QI0('I', 'T',  '5', '5'),            /* 600X */
1725         TPV_QI0('I', 'D',  '4', '8'),            /* 770, 770E, 770ED */
1726         TPV_QI0('I', 'I',  '4', '2'),            /* 770X */
1727         TPV_QI0('I', 'O',  '2', '3'),            /* 770Z */
1728
1729         /* A-series ------------------------- */
1730         /*      FW MODEL   BIOS VERS  EC VERS */
1731         TPV_QI0('I', 'W',  '5', '9'),            /* A20m */
1732         TPV_QI0('I', 'V',  '6', '9'),            /* A20p */
1733         TPV_QI0('1', '0',  '2', '6'),            /* A21e, A22e */
1734         TPV_QI0('K', 'U',  '3', '6'),            /* A21e */
1735         TPV_QI0('K', 'X',  '3', '6'),            /* A21m, A22m */
1736         TPV_QI0('K', 'Y',  '3', '8'),            /* A21p, A22p */
1737         TPV_QI0('1', 'B',  '1', '7'),            /* A22e */
1738         TPV_QI0('1', '3',  '2', '0'),            /* A22m */
1739         TPV_QI0('1', 'E',  '7', '3'),            /* A30/p (0) */
1740         TPV_QI1('1', 'G',  '4', '1',  '1', '7'), /* A31/p (0) */
1741         TPV_QI1('1', 'N',  '1', '6',  '0', '7'), /* A31/p (0) */
1742
1743         /* G-series ------------------------- */
1744         /*      FW MODEL   BIOS VERS          */
1745         TPV_QI0('1', 'T',  'A', '6'),            /* G40 */
1746         TPV_QI0('1', 'X',  '5', '7'),            /* G41 */
1747
1748         /* R-series, T-series --------------- */
1749         /*      FW MODEL   BIOS VERS  EC VERS */
1750         TPV_QI0('1', 'C',  'F', '0'),            /* R30 */
1751         TPV_QI0('1', 'F',  'F', '1'),            /* R31 */
1752         TPV_QI0('1', 'M',  '9', '7'),            /* R32 */
1753         TPV_QI0('1', 'O',  '6', '1'),            /* R40 */
1754         TPV_QI0('1', 'P',  '6', '5'),            /* R40 */
1755         TPV_QI0('1', 'S',  '7', '0'),            /* R40e */
1756         TPV_QI1('1', 'R',  'D', 'R',  '7', '1'), /* R50/p, R51,
1757                                                     T40/p, T41/p, T42/p (1) */
1758         TPV_QI1('1', 'V',  '7', '1',  '2', '8'), /* R50e, R51 (1) */
1759         TPV_QI1('7', '8',  '7', '1',  '0', '6'), /* R51e (1) */
1760         TPV_QI1('7', '6',  '6', '9',  '1', '6'), /* R52 (1) */
1761         TPV_QI1('7', '0',  '6', '9',  '2', '8'), /* R52, T43 (1) */
1762
1763         TPV_QI0('I', 'Y',  '6', '1'),            /* T20 */
1764         TPV_QI0('K', 'Z',  '3', '4'),            /* T21 */
1765         TPV_QI0('1', '6',  '3', '2'),            /* T22 */
1766         TPV_QI1('1', 'A',  '6', '4',  '2', '3'), /* T23 (0) */
1767         TPV_QI1('1', 'I',  '7', '1',  '2', '0'), /* T30 (0) */
1768         TPV_QI1('1', 'Y',  '6', '5',  '2', '9'), /* T43/p (1) */
1769
1770         TPV_QL1('7', '9',  'E', '3',  '5', '0'), /* T60/p */
1771         TPV_QL1('7', 'C',  'D', '2',  '2', '2'), /* R60, R60i */
1772         TPV_QL1('7', 'E',  'D', '0',  '1', '5'), /* R60e, R60i */
1773
1774         /*      BIOS FW    BIOS VERS  EC FW     EC VERS */
1775         TPV_QI2('1', 'W',  '9', '0',  '1', 'V', '2', '8'), /* R50e (1) */
1776         TPV_QL2('7', 'I',  '3', '4',  '7', '9', '5', '0'), /* T60/p wide */
1777
1778         /* X-series ------------------------- */
1779         /*      FW MODEL   BIOS VERS  EC VERS */
1780         TPV_QI0('I', 'Z',  '9', 'D'),            /* X20, X21 */
1781         TPV_QI0('1', 'D',  '7', '0'),            /* X22, X23, X24 */
1782         TPV_QI1('1', 'K',  '4', '8',  '1', '8'), /* X30 (0) */
1783         TPV_QI1('1', 'Q',  '9', '7',  '2', '3'), /* X31, X32 (0) */
1784         TPV_QI1('1', 'U',  'D', '3',  'B', '2'), /* X40 (0) */
1785         TPV_QI1('7', '4',  '6', '4',  '2', '7'), /* X41 (0) */
1786         TPV_QI1('7', '5',  '6', '0',  '2', '0'), /* X41t (0) */
1787
1788         TPV_QL1('7', 'B',  'D', '7',  '4', '0'), /* X60/s */
1789         TPV_QL1('7', 'J',  '3', '0',  '1', '3'), /* X60t */
1790
1791         /* (0) - older versions lack DMI EC fw string and functionality */
1792         /* (1) - older versions known to lack functionality */
1793 };
1794
1795 #undef TPV_QL1
1796 #undef TPV_QL0
1797 #undef TPV_QI2
1798 #undef TPV_QI1
1799 #undef TPV_QI0
1800 #undef TPV_Q_X
1801 #undef TPV_Q
1802
1803 static void __init tpacpi_check_outdated_fw(void)
1804 {
1805         unsigned long fwvers;
1806         u16 ec_version, bios_version;
1807
1808         fwvers = tpacpi_check_quirks(tpacpi_bios_version_qtable,
1809                                 ARRAY_SIZE(tpacpi_bios_version_qtable));
1810
1811         if (!fwvers)
1812                 return;
1813
1814         bios_version = fwvers & 0xffffU;
1815         ec_version = (fwvers >> 16) & 0xffffU;
1816
1817         /* note that unknown versions are set to 0x0000 and we use that */
1818         if ((bios_version > thinkpad_id.bios_release) ||
1819             (ec_version > thinkpad_id.ec_release &&
1820                                 ec_version != TPACPI_MATCH_ANY)) {
1821                 /*
1822                  * The changelogs would let us track down the exact
1823                  * reason, but it is just too much of a pain to track
1824                  * it.  We only list BIOSes that are either really
1825                  * broken, or really stable to begin with, so it is
1826                  * best if the user upgrades the firmware anyway.
1827                  */
1828                 printk(TPACPI_WARN
1829                         "WARNING: Outdated ThinkPad BIOS/EC firmware\n");
1830                 printk(TPACPI_WARN
1831                         "WARNING: This firmware may be missing critical bug "
1832                         "fixes and/or important features\n");
1833         }
1834 }
1835
1836 static bool __init tpacpi_is_fw_known(void)
1837 {
1838         return tpacpi_check_quirks(tpacpi_bios_version_qtable,
1839                         ARRAY_SIZE(tpacpi_bios_version_qtable)) != 0;
1840 }
1841
1842 /****************************************************************************
1843  ****************************************************************************
1844  *
1845  * Subdrivers
1846  *
1847  ****************************************************************************
1848  ****************************************************************************/
1849
1850 /*************************************************************************
1851  * thinkpad-acpi metadata subdriver
1852  */
1853
1854 static int thinkpad_acpi_driver_read(struct seq_file *m)
1855 {
1856         seq_printf(m, "driver:\t\t%s\n", TPACPI_DESC);
1857         seq_printf(m, "version:\t%s\n", TPACPI_VERSION);
1858         return 0;
1859 }
1860
1861 static struct ibm_struct thinkpad_acpi_driver_data = {
1862         .name = "driver",
1863         .read = thinkpad_acpi_driver_read,
1864 };
1865
1866 /*************************************************************************
1867  * Hotkey subdriver
1868  */
1869
1870 /*
1871  * ThinkPad firmware event model
1872  *
1873  * The ThinkPad firmware has two main event interfaces: normal ACPI
1874  * notifications (which follow the ACPI standard), and a private event
1875  * interface.
1876  *
1877  * The private event interface also issues events for the hotkeys.  As
1878  * the driver gained features, the event handling code ended up being
1879  * built around the hotkey subdriver.  This will need to be refactored
1880  * to a more formal event API eventually.
1881  *
1882  * Some "hotkeys" are actually supposed to be used as event reports,
1883  * such as "brightness has changed", "volume has changed", depending on
1884  * the ThinkPad model and how the firmware is operating.
1885  *
1886  * Unlike other classes, hotkey-class events have mask/unmask control on
1887  * non-ancient firmware.  However, how it behaves changes a lot with the
1888  * firmware model and version.
1889  */
1890
1891 enum {  /* hot key scan codes (derived from ACPI DSDT) */
1892         TP_ACPI_HOTKEYSCAN_FNF1         = 0,
1893         TP_ACPI_HOTKEYSCAN_FNF2,
1894         TP_ACPI_HOTKEYSCAN_FNF3,
1895         TP_ACPI_HOTKEYSCAN_FNF4,
1896         TP_ACPI_HOTKEYSCAN_FNF5,
1897         TP_ACPI_HOTKEYSCAN_FNF6,
1898         TP_ACPI_HOTKEYSCAN_FNF7,
1899         TP_ACPI_HOTKEYSCAN_FNF8,
1900         TP_ACPI_HOTKEYSCAN_FNF9,
1901         TP_ACPI_HOTKEYSCAN_FNF10,
1902         TP_ACPI_HOTKEYSCAN_FNF11,
1903         TP_ACPI_HOTKEYSCAN_FNF12,
1904         TP_ACPI_HOTKEYSCAN_FNBACKSPACE,
1905         TP_ACPI_HOTKEYSCAN_FNINSERT,
1906         TP_ACPI_HOTKEYSCAN_FNDELETE,
1907         TP_ACPI_HOTKEYSCAN_FNHOME,
1908         TP_ACPI_HOTKEYSCAN_FNEND,
1909         TP_ACPI_HOTKEYSCAN_FNPAGEUP,
1910         TP_ACPI_HOTKEYSCAN_FNPAGEDOWN,
1911         TP_ACPI_HOTKEYSCAN_FNSPACE,
1912         TP_ACPI_HOTKEYSCAN_VOLUMEUP,
1913         TP_ACPI_HOTKEYSCAN_VOLUMEDOWN,
1914         TP_ACPI_HOTKEYSCAN_MUTE,
1915         TP_ACPI_HOTKEYSCAN_THINKPAD,
1916         TP_ACPI_HOTKEYSCAN_UNK1,
1917         TP_ACPI_HOTKEYSCAN_UNK2,
1918         TP_ACPI_HOTKEYSCAN_UNK3,
1919         TP_ACPI_HOTKEYSCAN_UNK4,
1920         TP_ACPI_HOTKEYSCAN_UNK5,
1921         TP_ACPI_HOTKEYSCAN_UNK6,
1922         TP_ACPI_HOTKEYSCAN_UNK7,
1923         TP_ACPI_HOTKEYSCAN_UNK8,
1924
1925         /* Hotkey keymap size */
1926         TPACPI_HOTKEY_MAP_LEN
1927 };
1928
1929 enum {  /* Keys/events available through NVRAM polling */
1930         TPACPI_HKEY_NVRAM_KNOWN_MASK = 0x00fb88c0U,
1931         TPACPI_HKEY_NVRAM_GOOD_MASK  = 0x00fb8000U,
1932 };
1933
1934 enum {  /* Positions of some of the keys in hotkey masks */
1935         TP_ACPI_HKEY_DISPSWTCH_MASK     = 1 << TP_ACPI_HOTKEYSCAN_FNF7,
1936         TP_ACPI_HKEY_DISPXPAND_MASK     = 1 << TP_ACPI_HOTKEYSCAN_FNF8,
1937         TP_ACPI_HKEY_HIBERNATE_MASK     = 1 << TP_ACPI_HOTKEYSCAN_FNF12,
1938         TP_ACPI_HKEY_BRGHTUP_MASK       = 1 << TP_ACPI_HOTKEYSCAN_FNHOME,
1939         TP_ACPI_HKEY_BRGHTDWN_MASK      = 1 << TP_ACPI_HOTKEYSCAN_FNEND,
1940         TP_ACPI_HKEY_THNKLGHT_MASK      = 1 << TP_ACPI_HOTKEYSCAN_FNPAGEUP,
1941         TP_ACPI_HKEY_ZOOM_MASK          = 1 << TP_ACPI_HOTKEYSCAN_FNSPACE,
1942         TP_ACPI_HKEY_VOLUP_MASK         = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEUP,
1943         TP_ACPI_HKEY_VOLDWN_MASK        = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEDOWN,
1944         TP_ACPI_HKEY_MUTE_MASK          = 1 << TP_ACPI_HOTKEYSCAN_MUTE,
1945         TP_ACPI_HKEY_THINKPAD_MASK      = 1 << TP_ACPI_HOTKEYSCAN_THINKPAD,
1946 };
1947
1948 enum {  /* NVRAM to ACPI HKEY group map */
1949         TP_NVRAM_HKEY_GROUP_HK2         = TP_ACPI_HKEY_THINKPAD_MASK |
1950                                           TP_ACPI_HKEY_ZOOM_MASK |
1951                                           TP_ACPI_HKEY_DISPSWTCH_MASK |
1952                                           TP_ACPI_HKEY_HIBERNATE_MASK,
1953         TP_NVRAM_HKEY_GROUP_BRIGHTNESS  = TP_ACPI_HKEY_BRGHTUP_MASK |
1954                                           TP_ACPI_HKEY_BRGHTDWN_MASK,
1955         TP_NVRAM_HKEY_GROUP_VOLUME      = TP_ACPI_HKEY_VOLUP_MASK |
1956                                           TP_ACPI_HKEY_VOLDWN_MASK |
1957                                           TP_ACPI_HKEY_MUTE_MASK,
1958 };
1959
1960 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1961 struct tp_nvram_state {
1962        u16 thinkpad_toggle:1;
1963        u16 zoom_toggle:1;
1964        u16 display_toggle:1;
1965        u16 thinklight_toggle:1;
1966        u16 hibernate_toggle:1;
1967        u16 displayexp_toggle:1;
1968        u16 display_state:1;
1969        u16 brightness_toggle:1;
1970        u16 volume_toggle:1;
1971        u16 mute:1;
1972
1973        u8 brightness_level;
1974        u8 volume_level;
1975 };
1976
1977 /* kthread for the hotkey poller */
1978 static struct task_struct *tpacpi_hotkey_task;
1979
1980 /* Acquired while the poller kthread is running, use to sync start/stop */
1981 static struct mutex hotkey_thread_mutex;
1982
1983 /*
1984  * Acquire mutex to write poller control variables as an
1985  * atomic block.
1986  *
1987  * Increment hotkey_config_change when changing them if you
1988  * want the kthread to forget old state.
1989  *
1990  * See HOTKEY_CONFIG_CRITICAL_START/HOTKEY_CONFIG_CRITICAL_END
1991  */
1992 static struct mutex hotkey_thread_data_mutex;
1993 static unsigned int hotkey_config_change;
1994
1995 /*
1996  * hotkey poller control variables
1997  *
1998  * Must be atomic or readers will also need to acquire mutex
1999  *
2000  * HOTKEY_CONFIG_CRITICAL_START/HOTKEY_CONFIG_CRITICAL_END
2001  * should be used only when the changes need to be taken as
2002  * a block, OR when one needs to force the kthread to forget
2003  * old state.
2004  */
2005 static u32 hotkey_source_mask;          /* bit mask 0=ACPI,1=NVRAM */
2006 static unsigned int hotkey_poll_freq = 10; /* Hz */
2007
2008 #define HOTKEY_CONFIG_CRITICAL_START \
2009         do { \
2010                 mutex_lock(&hotkey_thread_data_mutex); \
2011                 hotkey_config_change++; \
2012         } while (0);
2013 #define HOTKEY_CONFIG_CRITICAL_END \
2014         mutex_unlock(&hotkey_thread_data_mutex);
2015
2016 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2017
2018 #define hotkey_source_mask 0U
2019 #define HOTKEY_CONFIG_CRITICAL_START
2020 #define HOTKEY_CONFIG_CRITICAL_END
2021
2022 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2023
2024 static struct mutex hotkey_mutex;
2025
2026 static enum {   /* Reasons for waking up */
2027         TP_ACPI_WAKEUP_NONE = 0,        /* None or unknown */
2028         TP_ACPI_WAKEUP_BAYEJ,           /* Bay ejection request */
2029         TP_ACPI_WAKEUP_UNDOCK,          /* Undock request */
2030 } hotkey_wakeup_reason;
2031
2032 static int hotkey_autosleep_ack;
2033
2034 static u32 hotkey_orig_mask;            /* events the BIOS had enabled */
2035 static u32 hotkey_all_mask;             /* all events supported in fw */
2036 static u32 hotkey_reserved_mask;        /* events better left disabled */
2037 static u32 hotkey_driver_mask;          /* events needed by the driver */
2038 static u32 hotkey_user_mask;            /* events visible to userspace */
2039 static u32 hotkey_acpi_mask;            /* events enabled in firmware */
2040
2041 static unsigned int hotkey_report_mode;
2042
2043 static u16 *hotkey_keycode_map;
2044
2045 static struct attribute_set *hotkey_dev_attributes;
2046
2047 static void tpacpi_driver_event(const unsigned int hkey_event);
2048 static void hotkey_driver_event(const unsigned int scancode);
2049 static void hotkey_poll_setup(const bool may_warn);
2050
2051 /* HKEY.MHKG() return bits */
2052 #define TP_HOTKEY_TABLET_MASK (1 << 3)
2053
2054 static int hotkey_get_wlsw(void)
2055 {
2056         int status;
2057
2058         if (!tp_features.hotkey_wlsw)
2059                 return -ENODEV;
2060
2061 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
2062         if (dbg_wlswemul)
2063                 return (tpacpi_wlsw_emulstate) ?
2064                                 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
2065 #endif
2066
2067         if (!acpi_evalf(hkey_handle, &status, "WLSW", "d"))
2068                 return -EIO;
2069
2070         return (status) ? TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
2071 }
2072
2073 static int hotkey_get_tablet_mode(int *status)
2074 {
2075         int s;
2076
2077         if (!acpi_evalf(hkey_handle, &s, "MHKG", "d"))
2078                 return -EIO;
2079
2080         *status = ((s & TP_HOTKEY_TABLET_MASK) != 0);
2081         return 0;
2082 }
2083
2084 /*
2085  * Reads current event mask from firmware, and updates
2086  * hotkey_acpi_mask accordingly.  Also resets any bits
2087  * from hotkey_user_mask that are unavailable to be
2088  * delivered (shadow requirement of the userspace ABI).
2089  *
2090  * Call with hotkey_mutex held
2091  */
2092 static int hotkey_mask_get(void)
2093 {
2094         if (tp_features.hotkey_mask) {
2095                 u32 m = 0;
2096
2097                 if (!acpi_evalf(hkey_handle, &m, "DHKN", "d"))
2098                         return -EIO;
2099
2100                 hotkey_acpi_mask = m;
2101         } else {
2102                 /* no mask support doesn't mean no event support... */
2103                 hotkey_acpi_mask = hotkey_all_mask;
2104         }
2105
2106         /* sync userspace-visible mask */
2107         hotkey_user_mask &= (hotkey_acpi_mask | hotkey_source_mask);
2108
2109         return 0;
2110 }
2111
2112 void static hotkey_mask_warn_incomplete_mask(void)
2113 {
2114         /* log only what the user can fix... */
2115         const u32 wantedmask = hotkey_driver_mask &
2116                 ~(hotkey_acpi_mask | hotkey_source_mask) &
2117                 (hotkey_all_mask | TPACPI_HKEY_NVRAM_KNOWN_MASK);
2118
2119         if (wantedmask)
2120                 printk(TPACPI_NOTICE
2121                         "required events 0x%08x not enabled!\n",
2122                         wantedmask);
2123 }
2124
2125 /*
2126  * Set the firmware mask when supported
2127  *
2128  * Also calls hotkey_mask_get to update hotkey_acpi_mask.
2129  *
2130  * NOTE: does not set bits in hotkey_user_mask, but may reset them.
2131  *
2132  * Call with hotkey_mutex held
2133  */
2134 static int hotkey_mask_set(u32 mask)
2135 {
2136         int i;
2137         int rc = 0;
2138
2139         const u32 fwmask = mask & ~hotkey_source_mask;
2140
2141         if (tp_features.hotkey_mask) {
2142                 for (i = 0; i < 32; i++) {
2143                         if (!acpi_evalf(hkey_handle,
2144                                         NULL, "MHKM", "vdd", i + 1,
2145                                         !!(mask & (1 << i)))) {
2146                                 rc = -EIO;
2147                                 break;
2148                         }
2149                 }
2150         }
2151
2152         /*
2153          * We *must* make an inconditional call to hotkey_mask_get to
2154          * refresh hotkey_acpi_mask and update hotkey_user_mask
2155          *
2156          * Take the opportunity to also log when we cannot _enable_
2157          * a given event.
2158          */
2159         if (!hotkey_mask_get() && !rc && (fwmask & ~hotkey_acpi_mask)) {
2160                 printk(TPACPI_NOTICE
2161                        "asked for hotkey mask 0x%08x, but "
2162                        "firmware forced it to 0x%08x\n",
2163                        fwmask, hotkey_acpi_mask);
2164         }
2165
2166         if (tpacpi_lifecycle != TPACPI_LIFE_EXITING)
2167                 hotkey_mask_warn_incomplete_mask();
2168
2169         return rc;
2170 }
2171
2172 /*
2173  * Sets hotkey_user_mask and tries to set the firmware mask
2174  *
2175  * Call with hotkey_mutex held
2176  */
2177 static int hotkey_user_mask_set(const u32 mask)
2178 {
2179         int rc;
2180
2181         /* Give people a chance to notice they are doing something that
2182          * is bound to go boom on their users sooner or later */
2183         if (!tp_warned.hotkey_mask_ff &&
2184             (mask == 0xffff || mask == 0xffffff ||
2185              mask == 0xffffffff)) {
2186                 tp_warned.hotkey_mask_ff = 1;
2187                 printk(TPACPI_NOTICE
2188                        "setting the hotkey mask to 0x%08x is likely "
2189                        "not the best way to go about it\n", mask);
2190                 printk(TPACPI_NOTICE
2191                        "please consider using the driver defaults, "
2192                        "and refer to up-to-date thinkpad-acpi "
2193                        "documentation\n");
2194         }
2195
2196         /* Try to enable what the user asked for, plus whatever we need.
2197          * this syncs everything but won't enable bits in hotkey_user_mask */
2198         rc = hotkey_mask_set((mask | hotkey_driver_mask) & ~hotkey_source_mask);
2199
2200         /* Enable the available bits in hotkey_user_mask */
2201         hotkey_user_mask = mask & (hotkey_acpi_mask | hotkey_source_mask);
2202
2203         return rc;
2204 }
2205
2206 /*
2207  * Sets the driver hotkey mask.
2208  *
2209  * Can be called even if the hotkey subdriver is inactive
2210  */
2211 static int tpacpi_hotkey_driver_mask_set(const u32 mask)
2212 {
2213         int rc;
2214
2215         /* Do the right thing if hotkey_init has not been called yet */
2216         if (!tp_features.hotkey) {
2217                 hotkey_driver_mask = mask;
2218                 return 0;
2219         }
2220
2221         mutex_lock(&hotkey_mutex);
2222
2223         HOTKEY_CONFIG_CRITICAL_START
2224         hotkey_driver_mask = mask;
2225 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2226         hotkey_source_mask |= (mask & ~hotkey_all_mask);
2227 #endif
2228         HOTKEY_CONFIG_CRITICAL_END
2229
2230         rc = hotkey_mask_set((hotkey_acpi_mask | hotkey_driver_mask) &
2231                                                         ~hotkey_source_mask);
2232         hotkey_poll_setup(true);
2233
2234         mutex_unlock(&hotkey_mutex);
2235
2236         return rc;
2237 }
2238
2239 static int hotkey_status_get(int *status)
2240 {
2241         if (!acpi_evalf(hkey_handle, status, "DHKC", "d"))
2242                 return -EIO;
2243
2244         return 0;
2245 }
2246
2247 static int hotkey_status_set(bool enable)
2248 {
2249         if (!acpi_evalf(hkey_handle, NULL, "MHKC", "vd", enable ? 1 : 0))
2250                 return -EIO;
2251
2252         return 0;
2253 }
2254
2255 static void tpacpi_input_send_tabletsw(void)
2256 {
2257         int state;
2258
2259         if (tp_features.hotkey_tablet &&
2260             !hotkey_get_tablet_mode(&state)) {
2261                 mutex_lock(&tpacpi_inputdev_send_mutex);
2262
2263                 input_report_switch(tpacpi_inputdev,
2264                                     SW_TABLET_MODE, !!state);
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(const unsigned int scancode)
2273 {
2274         const unsigned int keycode = hotkey_keycode_map[scancode];
2275
2276         if (keycode != KEY_RESERVED) {
2277                 mutex_lock(&tpacpi_inputdev_send_mutex);
2278
2279                 input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN, scancode);
2280                 input_report_key(tpacpi_inputdev, keycode, 1);
2281                 input_sync(tpacpi_inputdev);
2282
2283                 input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN, scancode);
2284                 input_report_key(tpacpi_inputdev, keycode, 0);
2285                 input_sync(tpacpi_inputdev);
2286
2287                 mutex_unlock(&tpacpi_inputdev_send_mutex);
2288         }
2289 }
2290
2291 /* Do NOT call without validating scancode first */
2292 static void tpacpi_input_send_key_masked(const unsigned int scancode)
2293 {
2294         hotkey_driver_event(scancode);
2295         if (hotkey_user_mask & (1 << scancode))
2296                 tpacpi_input_send_key(scancode);
2297 }
2298
2299 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2300 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver;
2301
2302 /* Do NOT call without validating scancode first */
2303 static void tpacpi_hotkey_send_key(unsigned int scancode)
2304 {
2305         tpacpi_input_send_key_masked(scancode);
2306         if (hotkey_report_mode < 2) {
2307                 acpi_bus_generate_proc_event(ibm_hotkey_acpidriver.device,
2308                                 0x80, TP_HKEY_EV_HOTKEY_BASE + scancode);
2309         }
2310 }
2311
2312 static void hotkey_read_nvram(struct tp_nvram_state *n, const u32 m)
2313 {
2314         u8 d;
2315
2316         if (m & TP_NVRAM_HKEY_GROUP_HK2) {
2317                 d = nvram_read_byte(TP_NVRAM_ADDR_HK2);
2318                 n->thinkpad_toggle = !!(d & TP_NVRAM_MASK_HKT_THINKPAD);
2319                 n->zoom_toggle = !!(d & TP_NVRAM_MASK_HKT_ZOOM);
2320                 n->display_toggle = !!(d & TP_NVRAM_MASK_HKT_DISPLAY);
2321                 n->hibernate_toggle = !!(d & TP_NVRAM_MASK_HKT_HIBERNATE);
2322         }
2323         if (m & TP_ACPI_HKEY_THNKLGHT_MASK) {
2324                 d = nvram_read_byte(TP_NVRAM_ADDR_THINKLIGHT);
2325                 n->thinklight_toggle = !!(d & TP_NVRAM_MASK_THINKLIGHT);
2326         }
2327         if (m & TP_ACPI_HKEY_DISPXPAND_MASK) {
2328                 d = nvram_read_byte(TP_NVRAM_ADDR_VIDEO);
2329                 n->displayexp_toggle =
2330                                 !!(d & TP_NVRAM_MASK_HKT_DISPEXPND);
2331         }
2332         if (m & TP_NVRAM_HKEY_GROUP_BRIGHTNESS) {
2333                 d = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS);
2334                 n->brightness_level = (d & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
2335                                 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
2336                 n->brightness_toggle =
2337                                 !!(d & TP_NVRAM_MASK_HKT_BRIGHTNESS);
2338         }
2339         if (m & TP_NVRAM_HKEY_GROUP_VOLUME) {
2340                 d = nvram_read_byte(TP_NVRAM_ADDR_MIXER);
2341                 n->volume_level = (d & TP_NVRAM_MASK_LEVEL_VOLUME)
2342                                 >> TP_NVRAM_POS_LEVEL_VOLUME;
2343                 n->mute = !!(d & TP_NVRAM_MASK_MUTE);
2344                 n->volume_toggle = !!(d & TP_NVRAM_MASK_HKT_VOLUME);
2345         }
2346 }
2347
2348 static void hotkey_compare_and_issue_event(struct tp_nvram_state *oldn,
2349                                            struct tp_nvram_state *newn,
2350                                            const u32 event_mask)
2351 {
2352
2353 #define TPACPI_COMPARE_KEY(__scancode, __member) \
2354         do { \
2355                 if ((event_mask & (1 << __scancode)) && \
2356                     oldn->__member != newn->__member) \
2357                         tpacpi_hotkey_send_key(__scancode); \
2358         } while (0)
2359
2360 #define TPACPI_MAY_SEND_KEY(__scancode) \
2361         do { \
2362                 if (event_mask & (1 << __scancode)) \
2363                         tpacpi_hotkey_send_key(__scancode); \
2364         } while (0)
2365
2366         void issue_volchange(const unsigned int oldvol,
2367                              const unsigned int newvol)
2368         {
2369                 unsigned int i = oldvol;
2370
2371                 while (i > newvol) {
2372                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
2373                         i--;
2374                 }
2375                 while (i < newvol) {
2376                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
2377                         i++;
2378                 }
2379         }
2380
2381         void issue_brightnesschange(const unsigned int oldbrt,
2382                                     const unsigned int newbrt)
2383         {
2384                 unsigned int i = oldbrt;
2385
2386                 while (i > newbrt) {
2387                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
2388                         i--;
2389                 }
2390                 while (i < newbrt) {
2391                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
2392                         i++;
2393                 }
2394         }
2395
2396         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_THINKPAD, thinkpad_toggle);
2397         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNSPACE, zoom_toggle);
2398         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF7, display_toggle);
2399         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF12, hibernate_toggle);
2400
2401         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNPAGEUP, thinklight_toggle);
2402
2403         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF8, displayexp_toggle);
2404
2405         /*
2406          * Handle volume
2407          *
2408          * This code is supposed to duplicate the IBM firmware behaviour:
2409          * - Pressing MUTE issues mute hotkey message, even when already mute
2410          * - Pressing Volume up/down issues volume up/down hotkey messages,
2411          *   even when already at maximum or minimum volume
2412          * - The act of unmuting issues volume up/down notification,
2413          *   depending which key was used to unmute
2414          *
2415          * We are constrained to what the NVRAM can tell us, which is not much
2416          * and certainly not enough if more than one volume hotkey was pressed
2417          * since the last poll cycle.
2418          *
2419          * Just to make our life interesting, some newer Lenovo ThinkPads have
2420          * bugs in the BIOS and may fail to update volume_toggle properly.
2421          */
2422         if (newn->mute) {
2423                 /* muted */
2424                 if (!oldn->mute ||
2425                     oldn->volume_toggle != newn->volume_toggle ||
2426                     oldn->volume_level != newn->volume_level) {
2427                         /* recently muted, or repeated mute keypress, or
2428                          * multiple presses ending in mute */
2429                         issue_volchange(oldn->volume_level, newn->volume_level);
2430                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE);
2431                 }
2432         } else {
2433                 /* unmute */
2434                 if (oldn->mute) {
2435                         /* recently unmuted, issue 'unmute' keypress */
2436                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
2437                 }
2438                 if (oldn->volume_level != newn->volume_level) {
2439                         issue_volchange(oldn->volume_level, newn->volume_level);
2440                 } else if (oldn->volume_toggle != newn->volume_toggle) {
2441                         /* repeated vol up/down keypress at end of scale ? */
2442                         if (newn->volume_level == 0)
2443                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
2444                         else if (newn->volume_level >= TP_NVRAM_LEVEL_VOLUME_MAX)
2445                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
2446                 }
2447         }
2448
2449         /* handle brightness */
2450         if (oldn->brightness_level != newn->brightness_level) {
2451                 issue_brightnesschange(oldn->brightness_level,
2452                                        newn->brightness_level);
2453         } else if (oldn->brightness_toggle != newn->brightness_toggle) {
2454                 /* repeated key presses that didn't change state */
2455                 if (newn->brightness_level == 0)
2456                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
2457                 else if (newn->brightness_level >= bright_maxlvl
2458                                 && !tp_features.bright_unkfw)
2459                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
2460         }
2461
2462 #undef TPACPI_COMPARE_KEY
2463 #undef TPACPI_MAY_SEND_KEY
2464 }
2465
2466 /*
2467  * Polling driver
2468  *
2469  * We track all events in hotkey_source_mask all the time, since
2470  * most of them are edge-based.  We only issue those requested by
2471  * hotkey_user_mask or hotkey_driver_mask, though.
2472  */
2473 static int hotkey_kthread(void *data)
2474 {
2475         struct tp_nvram_state s[2];
2476         u32 poll_mask, event_mask;
2477         unsigned int si, so;
2478         unsigned long t;
2479         unsigned int change_detector, must_reset;
2480         unsigned int poll_freq;
2481
2482         mutex_lock(&hotkey_thread_mutex);
2483
2484         if (tpacpi_lifecycle == TPACPI_LIFE_EXITING)
2485                 goto exit;
2486
2487         set_freezable();
2488
2489         so = 0;
2490         si = 1;
2491         t = 0;
2492
2493         /* Initial state for compares */
2494         mutex_lock(&hotkey_thread_data_mutex);
2495         change_detector = hotkey_config_change;
2496         poll_mask = hotkey_source_mask;
2497         event_mask = hotkey_source_mask &
2498                         (hotkey_driver_mask | hotkey_user_mask);
2499         poll_freq = hotkey_poll_freq;
2500         mutex_unlock(&hotkey_thread_data_mutex);
2501         hotkey_read_nvram(&s[so], poll_mask);
2502
2503         while (!kthread_should_stop()) {
2504                 if (t == 0) {
2505                         if (likely(poll_freq))
2506                                 t = 1000/poll_freq;
2507                         else
2508                                 t = 100;        /* should never happen... */
2509                 }
2510                 t = msleep_interruptible(t);
2511                 if (unlikely(kthread_should_stop()))
2512                         break;
2513                 must_reset = try_to_freeze();
2514                 if (t > 0 && !must_reset)
2515                         continue;
2516
2517                 mutex_lock(&hotkey_thread_data_mutex);
2518                 if (must_reset || hotkey_config_change != change_detector) {
2519                         /* forget old state on thaw or config change */
2520                         si = so;
2521                         t = 0;
2522                         change_detector = hotkey_config_change;
2523                 }
2524                 poll_mask = hotkey_source_mask;
2525                 event_mask = hotkey_source_mask &
2526                                 (hotkey_driver_mask | hotkey_user_mask);
2527                 poll_freq = hotkey_poll_freq;
2528                 mutex_unlock(&hotkey_thread_data_mutex);
2529
2530                 if (likely(poll_mask)) {
2531                         hotkey_read_nvram(&s[si], poll_mask);
2532                         if (likely(si != so)) {
2533                                 hotkey_compare_and_issue_event(&s[so], &s[si],
2534                                                                 event_mask);
2535                         }
2536                 }
2537
2538                 so = si;
2539                 si ^= 1;
2540         }
2541
2542 exit:
2543         mutex_unlock(&hotkey_thread_mutex);
2544         return 0;
2545 }
2546
2547 /* call with hotkey_mutex held */
2548 static void hotkey_poll_stop_sync(void)
2549 {
2550         if (tpacpi_hotkey_task) {
2551                 if (frozen(tpacpi_hotkey_task) ||
2552                     freezing(tpacpi_hotkey_task))
2553                         thaw_process(tpacpi_hotkey_task);
2554
2555                 kthread_stop(tpacpi_hotkey_task);
2556                 tpacpi_hotkey_task = NULL;
2557                 mutex_lock(&hotkey_thread_mutex);
2558                 /* at this point, the thread did exit */
2559                 mutex_unlock(&hotkey_thread_mutex);
2560         }
2561 }
2562
2563 /* call with hotkey_mutex held */
2564 static void hotkey_poll_setup(const bool may_warn)
2565 {
2566         const u32 poll_driver_mask = hotkey_driver_mask & hotkey_source_mask;
2567         const u32 poll_user_mask = hotkey_user_mask & hotkey_source_mask;
2568
2569         if (hotkey_poll_freq > 0 &&
2570             (poll_driver_mask ||
2571              (poll_user_mask && tpacpi_inputdev->users > 0))) {
2572                 if (!tpacpi_hotkey_task) {
2573                         tpacpi_hotkey_task = kthread_run(hotkey_kthread,
2574                                         NULL, TPACPI_NVRAM_KTHREAD_NAME);
2575                         if (IS_ERR(tpacpi_hotkey_task)) {
2576                                 tpacpi_hotkey_task = NULL;
2577                                 printk(TPACPI_ERR
2578                                        "could not create kernel thread "
2579                                        "for hotkey polling\n");
2580                         }
2581                 }
2582         } else {
2583                 hotkey_poll_stop_sync();
2584                 if (may_warn && (poll_driver_mask || poll_user_mask) &&
2585                     hotkey_poll_freq == 0) {
2586                         printk(TPACPI_NOTICE
2587                                 "hot keys 0x%08x and/or events 0x%08x "
2588                                 "require polling, which is currently "
2589                                 "disabled\n",
2590                                 poll_user_mask, poll_driver_mask);
2591                 }
2592         }
2593 }
2594
2595 static void hotkey_poll_setup_safe(const bool may_warn)
2596 {
2597         mutex_lock(&hotkey_mutex);
2598         hotkey_poll_setup(may_warn);
2599         mutex_unlock(&hotkey_mutex);
2600 }
2601
2602 /* call with hotkey_mutex held */
2603 static void hotkey_poll_set_freq(unsigned int freq)
2604 {
2605         if (!freq)
2606                 hotkey_poll_stop_sync();
2607
2608         hotkey_poll_freq = freq;
2609 }
2610
2611 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2612
2613 static void hotkey_poll_setup(const bool __unused)
2614 {
2615 }
2616
2617 static void hotkey_poll_setup_safe(const bool __unused)
2618 {
2619 }
2620
2621 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2622
2623 static int hotkey_inputdev_open(struct input_dev *dev)
2624 {
2625         switch (tpacpi_lifecycle) {
2626         case TPACPI_LIFE_INIT:
2627         case TPACPI_LIFE_RUNNING:
2628                 hotkey_poll_setup_safe(false);
2629                 return 0;
2630         case TPACPI_LIFE_EXITING:
2631                 return -EBUSY;
2632         }
2633
2634         /* Should only happen if tpacpi_lifecycle is corrupt */
2635         BUG();
2636         return -EBUSY;
2637 }
2638
2639 static void hotkey_inputdev_close(struct input_dev *dev)
2640 {
2641         /* disable hotkey polling when possible */
2642         if (tpacpi_lifecycle != TPACPI_LIFE_EXITING &&
2643             !(hotkey_source_mask & hotkey_driver_mask))
2644                 hotkey_poll_setup_safe(false);
2645 }
2646
2647 /* sysfs hotkey enable ------------------------------------------------- */
2648 static ssize_t hotkey_enable_show(struct device *dev,
2649                            struct device_attribute *attr,
2650                            char *buf)
2651 {
2652         int res, status;
2653
2654         printk_deprecated_attribute("hotkey_enable",
2655                         "Hotkey reporting is always enabled");
2656
2657         res = hotkey_status_get(&status);
2658         if (res)
2659                 return res;
2660
2661         return snprintf(buf, PAGE_SIZE, "%d\n", status);
2662 }
2663
2664 static ssize_t hotkey_enable_store(struct device *dev,
2665                             struct device_attribute *attr,
2666                             const char *buf, size_t count)
2667 {
2668         unsigned long t;
2669
2670         printk_deprecated_attribute("hotkey_enable",
2671                         "Hotkeys can be disabled through hotkey_mask");
2672
2673         if (parse_strtoul(buf, 1, &t))
2674                 return -EINVAL;
2675
2676         if (t == 0)
2677                 return -EPERM;
2678
2679         return count;
2680 }
2681
2682 static struct device_attribute dev_attr_hotkey_enable =
2683         __ATTR(hotkey_enable, S_IWUSR | S_IRUGO,
2684                 hotkey_enable_show, hotkey_enable_store);
2685
2686 /* sysfs hotkey mask --------------------------------------------------- */
2687 static ssize_t hotkey_mask_show(struct device *dev,
2688                            struct device_attribute *attr,
2689                            char *buf)
2690 {
2691         return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_user_mask);
2692 }
2693
2694 static ssize_t hotkey_mask_store(struct device *dev,
2695                             struct device_attribute *attr,
2696                             const char *buf, size_t count)
2697 {
2698         unsigned long t;
2699         int res;
2700
2701         if (parse_strtoul(buf, 0xffffffffUL, &t))
2702                 return -EINVAL;
2703
2704         if (mutex_lock_killable(&hotkey_mutex))
2705                 return -ERESTARTSYS;
2706
2707         res = hotkey_user_mask_set(t);
2708
2709 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2710         hotkey_poll_setup(true);
2711 #endif
2712
2713         mutex_unlock(&hotkey_mutex);
2714
2715         tpacpi_disclose_usertask("hotkey_mask", "set to 0x%08lx\n", t);
2716
2717         return (res) ? res : count;
2718 }
2719
2720 static struct device_attribute dev_attr_hotkey_mask =
2721         __ATTR(hotkey_mask, S_IWUSR | S_IRUGO,
2722                 hotkey_mask_show, hotkey_mask_store);
2723
2724 /* sysfs hotkey bios_enabled ------------------------------------------- */
2725 static ssize_t hotkey_bios_enabled_show(struct device *dev,
2726                            struct device_attribute *attr,
2727                            char *buf)
2728 {
2729         return sprintf(buf, "0\n");
2730 }
2731
2732 static struct device_attribute dev_attr_hotkey_bios_enabled =
2733         __ATTR(hotkey_bios_enabled, S_IRUGO, hotkey_bios_enabled_show, NULL);
2734
2735 /* sysfs hotkey bios_mask ---------------------------------------------- */
2736 static ssize_t hotkey_bios_mask_show(struct device *dev,
2737                            struct device_attribute *attr,
2738                            char *buf)
2739 {
2740         printk_deprecated_attribute("hotkey_bios_mask",
2741                         "This attribute is useless.");
2742         return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_orig_mask);
2743 }
2744
2745 static struct device_attribute dev_attr_hotkey_bios_mask =
2746         __ATTR(hotkey_bios_mask, S_IRUGO, hotkey_bios_mask_show, NULL);
2747
2748 /* sysfs hotkey all_mask ----------------------------------------------- */
2749 static ssize_t hotkey_all_mask_show(struct device *dev,
2750                            struct device_attribute *attr,
2751                            char *buf)
2752 {
2753         return snprintf(buf, PAGE_SIZE, "0x%08x\n",
2754                                 hotkey_all_mask | hotkey_source_mask);
2755 }
2756
2757 static struct device_attribute dev_attr_hotkey_all_mask =
2758         __ATTR(hotkey_all_mask, S_IRUGO, hotkey_all_mask_show, NULL);
2759
2760 /* sysfs hotkey recommended_mask --------------------------------------- */
2761 static ssize_t hotkey_recommended_mask_show(struct device *dev,
2762                                             struct device_attribute *attr,
2763                                             char *buf)
2764 {
2765         return snprintf(buf, PAGE_SIZE, "0x%08x\n",
2766                         (hotkey_all_mask | hotkey_source_mask)
2767                         & ~hotkey_reserved_mask);
2768 }
2769
2770 static struct device_attribute dev_attr_hotkey_recommended_mask =
2771         __ATTR(hotkey_recommended_mask, S_IRUGO,
2772                 hotkey_recommended_mask_show, NULL);
2773
2774 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2775
2776 /* sysfs hotkey hotkey_source_mask ------------------------------------- */
2777 static ssize_t hotkey_source_mask_show(struct device *dev,
2778                            struct device_attribute *attr,
2779                            char *buf)
2780 {
2781         return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_source_mask);
2782 }
2783
2784 static ssize_t hotkey_source_mask_store(struct device *dev,
2785                             struct device_attribute *attr,
2786                             const char *buf, size_t count)
2787 {
2788         unsigned long t;
2789         u32 r_ev;
2790         int rc;
2791
2792         if (parse_strtoul(buf, 0xffffffffUL, &t) ||
2793                 ((t & ~TPACPI_HKEY_NVRAM_KNOWN_MASK) != 0))
2794                 return -EINVAL;
2795
2796         if (mutex_lock_killable(&hotkey_mutex))
2797                 return -ERESTARTSYS;
2798
2799         HOTKEY_CONFIG_CRITICAL_START
2800         hotkey_source_mask = t;
2801         HOTKEY_CONFIG_CRITICAL_END
2802
2803         rc = hotkey_mask_set((hotkey_user_mask | hotkey_driver_mask) &
2804                         ~hotkey_source_mask);
2805         hotkey_poll_setup(true);
2806
2807         /* check if events needed by the driver got disabled */
2808         r_ev = hotkey_driver_mask & ~(hotkey_acpi_mask & hotkey_all_mask)
2809                 & ~hotkey_source_mask & TPACPI_HKEY_NVRAM_KNOWN_MASK;
2810
2811         mutex_unlock(&hotkey_mutex);
2812
2813         if (rc < 0)
2814                 printk(TPACPI_ERR "hotkey_source_mask: failed to update the"
2815                         "firmware event mask!\n");
2816
2817         if (r_ev)
2818                 printk(TPACPI_NOTICE "hotkey_source_mask: "
2819                         "some important events were disabled: "
2820                         "0x%04x\n", r_ev);
2821
2822         tpacpi_disclose_usertask("hotkey_source_mask", "set to 0x%08lx\n", t);
2823
2824         return (rc < 0) ? rc : count;
2825 }
2826
2827 static struct device_attribute dev_attr_hotkey_source_mask =
2828         __ATTR(hotkey_source_mask, S_IWUSR | S_IRUGO,
2829                 hotkey_source_mask_show, hotkey_source_mask_store);
2830
2831 /* sysfs hotkey hotkey_poll_freq --------------------------------------- */
2832 static ssize_t hotkey_poll_freq_show(struct device *dev,
2833                            struct device_attribute *attr,
2834                            char *buf)
2835 {
2836         return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_poll_freq);
2837 }
2838
2839 static ssize_t hotkey_poll_freq_store(struct device *dev,
2840                             struct device_attribute *attr,
2841                             const char *buf, size_t count)
2842 {
2843         unsigned long t;
2844
2845         if (parse_strtoul(buf, 25, &t))
2846                 return -EINVAL;
2847
2848         if (mutex_lock_killable(&hotkey_mutex))
2849                 return -ERESTARTSYS;
2850
2851         hotkey_poll_set_freq(t);
2852         hotkey_poll_setup(true);
2853
2854         mutex_unlock(&hotkey_mutex);
2855
2856         tpacpi_disclose_usertask("hotkey_poll_freq", "set to %lu\n", t);
2857
2858         return count;
2859 }
2860
2861 static struct device_attribute dev_attr_hotkey_poll_freq =
2862         __ATTR(hotkey_poll_freq, S_IWUSR | S_IRUGO,
2863                 hotkey_poll_freq_show, hotkey_poll_freq_store);
2864
2865 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2866
2867 /* sysfs hotkey radio_sw (pollable) ------------------------------------ */
2868 static ssize_t hotkey_radio_sw_show(struct device *dev,
2869                            struct device_attribute *attr,
2870                            char *buf)
2871 {
2872         int res;
2873         res = hotkey_get_wlsw();
2874         if (res < 0)
2875                 return res;
2876
2877         /* Opportunistic update */
2878         tpacpi_rfk_update_hwblock_state((res == TPACPI_RFK_RADIO_OFF));
2879
2880         return snprintf(buf, PAGE_SIZE, "%d\n",
2881                         (res == TPACPI_RFK_RADIO_OFF) ? 0 : 1);
2882 }
2883
2884 static struct device_attribute dev_attr_hotkey_radio_sw =
2885         __ATTR(hotkey_radio_sw, S_IRUGO, hotkey_radio_sw_show, NULL);
2886
2887 static void hotkey_radio_sw_notify_change(void)
2888 {
2889         if (tp_features.hotkey_wlsw)
2890                 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2891                              "hotkey_radio_sw");
2892 }
2893
2894 /* sysfs hotkey tablet mode (pollable) --------------------------------- */
2895 static ssize_t hotkey_tablet_mode_show(struct device *dev,
2896                            struct device_attribute *attr,
2897                            char *buf)
2898 {
2899         int res, s;
2900         res = hotkey_get_tablet_mode(&s);
2901         if (res < 0)
2902                 return res;
2903
2904         return snprintf(buf, PAGE_SIZE, "%d\n", !!s);
2905 }
2906
2907 static struct device_attribute dev_attr_hotkey_tablet_mode =
2908         __ATTR(hotkey_tablet_mode, S_IRUGO, hotkey_tablet_mode_show, NULL);
2909
2910 static void hotkey_tablet_mode_notify_change(void)
2911 {
2912         if (tp_features.hotkey_tablet)
2913                 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2914                              "hotkey_tablet_mode");
2915 }
2916
2917 /* sysfs hotkey report_mode -------------------------------------------- */
2918 static ssize_t hotkey_report_mode_show(struct device *dev,
2919                            struct device_attribute *attr,
2920                            char *buf)
2921 {
2922         return snprintf(buf, PAGE_SIZE, "%d\n",
2923                 (hotkey_report_mode != 0) ? hotkey_report_mode : 1);
2924 }
2925
2926 static struct device_attribute dev_attr_hotkey_report_mode =
2927         __ATTR(hotkey_report_mode, S_IRUGO, hotkey_report_mode_show, NULL);
2928
2929 /* sysfs wakeup reason (pollable) -------------------------------------- */
2930 static ssize_t hotkey_wakeup_reason_show(struct device *dev,
2931                            struct device_attribute *attr,
2932                            char *buf)
2933 {
2934         return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_wakeup_reason);
2935 }
2936
2937 static struct device_attribute dev_attr_hotkey_wakeup_reason =
2938         __ATTR(wakeup_reason, S_IRUGO, hotkey_wakeup_reason_show, NULL);
2939
2940 static void hotkey_wakeup_reason_notify_change(void)
2941 {
2942         sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2943                      "wakeup_reason");
2944 }
2945
2946 /* sysfs wakeup hotunplug_complete (pollable) -------------------------- */
2947 static ssize_t hotkey_wakeup_hotunplug_complete_show(struct device *dev,
2948                            struct device_attribute *attr,
2949                            char *buf)
2950 {
2951         return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_autosleep_ack);
2952 }
2953
2954 static struct device_attribute dev_attr_hotkey_wakeup_hotunplug_complete =
2955         __ATTR(wakeup_hotunplug_complete, S_IRUGO,
2956                hotkey_wakeup_hotunplug_complete_show, NULL);
2957
2958 static void hotkey_wakeup_hotunplug_complete_notify_change(void)
2959 {
2960         sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2961                      "wakeup_hotunplug_complete");
2962 }
2963
2964 /* --------------------------------------------------------------------- */
2965
2966 static struct attribute *hotkey_attributes[] __initdata = {
2967         &dev_attr_hotkey_enable.attr,
2968         &dev_attr_hotkey_bios_enabled.attr,
2969         &dev_attr_hotkey_bios_mask.attr,
2970         &dev_attr_hotkey_report_mode.attr,
2971         &dev_attr_hotkey_wakeup_reason.attr,
2972         &dev_attr_hotkey_wakeup_hotunplug_complete.attr,
2973         &dev_attr_hotkey_mask.attr,
2974         &dev_attr_hotkey_all_mask.attr,
2975         &dev_attr_hotkey_recommended_mask.attr,
2976 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2977         &dev_attr_hotkey_source_mask.attr,
2978         &dev_attr_hotkey_poll_freq.attr,
2979 #endif
2980 };
2981
2982 /*
2983  * Sync both the hw and sw blocking state of all switches
2984  */
2985 static void tpacpi_send_radiosw_update(void)
2986 {
2987         int wlsw;
2988
2989         /*
2990          * We must sync all rfkill controllers *before* issuing any
2991          * rfkill input events, or we will race the rfkill core input
2992          * handler.
2993          *
2994          * tpacpi_inputdev_send_mutex works as a synchronization point
2995          * for the above.
2996          *
2997          * We optimize to avoid numerous calls to hotkey_get_wlsw.
2998          */
2999
3000         wlsw = hotkey_get_wlsw();
3001
3002         /* Sync hw blocking state first if it is hw-blocked */
3003         if (wlsw == TPACPI_RFK_RADIO_OFF)
3004                 tpacpi_rfk_update_hwblock_state(true);
3005
3006         /* Sync sw blocking state */
3007         tpacpi_rfk_update_swstate_all();
3008
3009         /* Sync hw blocking state last if it is hw-unblocked */
3010         if (wlsw == TPACPI_RFK_RADIO_ON)
3011                 tpacpi_rfk_update_hwblock_state(false);
3012
3013         /* Issue rfkill input event for WLSW switch */
3014         if (!(wlsw < 0)) {
3015                 mutex_lock(&tpacpi_inputdev_send_mutex);
3016
3017                 input_report_switch(tpacpi_inputdev,
3018                                     SW_RFKILL_ALL, (wlsw > 0));
3019                 input_sync(tpacpi_inputdev);
3020
3021                 mutex_unlock(&tpacpi_inputdev_send_mutex);
3022         }
3023
3024         /*
3025          * this can be unconditional, as we will poll state again
3026          * if userspace uses the notify to read data
3027          */
3028         hotkey_radio_sw_notify_change();
3029 }
3030
3031 static void hotkey_exit(void)
3032 {
3033 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
3034         mutex_lock(&hotkey_mutex);
3035         hotkey_poll_stop_sync();
3036         mutex_unlock(&hotkey_mutex);
3037 #endif
3038
3039         if (hotkey_dev_attributes)
3040                 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
3041
3042         kfree(hotkey_keycode_map);
3043
3044         dbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_HKEY,
3045                    "restoring original HKEY status and mask\n");
3046         /* yes, there is a bitwise or below, we want the
3047          * functions to be called even if one of them fail */
3048         if (((tp_features.hotkey_mask &&
3049               hotkey_mask_set(hotkey_orig_mask)) |
3050              hotkey_status_set(false)) != 0)
3051                 printk(TPACPI_ERR
3052                        "failed to restore hot key mask "
3053                        "to BIOS defaults\n");
3054 }
3055
3056 static void __init hotkey_unmap(const unsigned int scancode)
3057 {
3058         if (hotkey_keycode_map[scancode] != KEY_RESERVED) {
3059                 clear_bit(hotkey_keycode_map[scancode],
3060                           tpacpi_inputdev->keybit);
3061                 hotkey_keycode_map[scancode] = KEY_RESERVED;
3062         }
3063 }
3064
3065 /*
3066  * HKEY quirks:
3067  *   TPACPI_HK_Q_INIMASK:       Supports FN+F3,FN+F4,FN+F12
3068  */
3069
3070 #define TPACPI_HK_Q_INIMASK     0x0001
3071
3072 static const struct tpacpi_quirk tpacpi_hotkey_qtable[] __initconst = {
3073         TPACPI_Q_IBM('I', 'H', TPACPI_HK_Q_INIMASK), /* 600E */
3074         TPACPI_Q_IBM('I', 'N', TPACPI_HK_Q_INIMASK), /* 600E */
3075         TPACPI_Q_IBM('I', 'D', TPACPI_HK_Q_INIMASK), /* 770, 770E, 770ED */
3076         TPACPI_Q_IBM('I', 'W', TPACPI_HK_Q_INIMASK), /* A20m */
3077         TPACPI_Q_IBM('I', 'V', TPACPI_HK_Q_INIMASK), /* A20p */
3078         TPACPI_Q_IBM('1', '0', TPACPI_HK_Q_INIMASK), /* A21e, A22e */
3079         TPACPI_Q_IBM('K', 'U', TPACPI_HK_Q_INIMASK), /* A21e */
3080         TPACPI_Q_IBM('K', 'X', TPACPI_HK_Q_INIMASK), /* A21m, A22m */
3081         TPACPI_Q_IBM('K', 'Y', TPACPI_HK_Q_INIMASK), /* A21p, A22p */
3082         TPACPI_Q_IBM('1', 'B', TPACPI_HK_Q_INIMASK), /* A22e */
3083         TPACPI_Q_IBM('1', '3', TPACPI_HK_Q_INIMASK), /* A22m */
3084         TPACPI_Q_IBM('1', 'E', TPACPI_HK_Q_INIMASK), /* A30/p (0) */
3085         TPACPI_Q_IBM('1', 'C', TPACPI_HK_Q_INIMASK), /* R30 */
3086         TPACPI_Q_IBM('1', 'F', TPACPI_HK_Q_INIMASK), /* R31 */
3087         TPACPI_Q_IBM('I', 'Y', TPACPI_HK_Q_INIMASK), /* T20 */
3088         TPACPI_Q_IBM('K', 'Z', TPACPI_HK_Q_INIMASK), /* T21 */
3089         TPACPI_Q_IBM('1', '6', TPACPI_HK_Q_INIMASK), /* T22 */
3090         TPACPI_Q_IBM('I', 'Z', TPACPI_HK_Q_INIMASK), /* X20, X21 */
3091         TPACPI_Q_IBM('1', 'D', TPACPI_HK_Q_INIMASK), /* X22, X23, X24 */
3092 };
3093
3094 typedef u16 tpacpi_keymap_entry_t;
3095 typedef tpacpi_keymap_entry_t tpacpi_keymap_t[TPACPI_HOTKEY_MAP_LEN];
3096
3097 static int __init hotkey_init(struct ibm_init_struct *iibm)
3098 {
3099         /* Requirements for changing the default keymaps:
3100          *
3101          * 1. Many of the keys are mapped to KEY_RESERVED for very
3102          *    good reasons.  Do not change them unless you have deep
3103          *    knowledge on the IBM and Lenovo ThinkPad firmware for
3104          *    the various ThinkPad models.  The driver behaves
3105          *    differently for KEY_RESERVED: such keys have their
3106          *    hot key mask *unset* in mask_recommended, and also
3107          *    in the initial hot key mask programmed into the
3108          *    firmware at driver load time, which means the firm-
3109          *    ware may react very differently if you change them to
3110          *    something else;
3111          *
3112          * 2. You must be subscribed to the linux-thinkpad and
3113          *    ibm-acpi-devel mailing lists, and you should read the
3114          *    list archives since 2007 if you want to change the
3115          *    keymaps.  This requirement exists so that you will
3116          *    know the past history of problems with the thinkpad-
3117          *    acpi driver keymaps, and also that you will be
3118          *    listening to any bug reports;
3119          *
3120          * 3. Do not send thinkpad-acpi specific patches directly to
3121          *    for merging, *ever*.  Send them to the linux-acpi
3122          *    mailinglist for comments.  Merging is to be done only
3123          *    through acpi-test and the ACPI maintainer.
3124          *
3125          * If the above is too much to ask, don't change the keymap.
3126          * Ask the thinkpad-acpi maintainer to do it, instead.
3127          */
3128
3129         enum keymap_index {
3130                 TPACPI_KEYMAP_IBM_GENERIC = 0,
3131                 TPACPI_KEYMAP_LENOVO_GENERIC,
3132         };
3133
3134         static const tpacpi_keymap_t tpacpi_keymaps[] __initconst = {
3135         /* Generic keymap for IBM ThinkPads */
3136         [TPACPI_KEYMAP_IBM_GENERIC] = {
3137                 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
3138                 KEY_FN_F1,      KEY_BATTERY,    KEY_COFFEE,     KEY_SLEEP,
3139                 KEY_WLAN,       KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
3140                 KEY_FN_F9,      KEY_FN_F10,     KEY_FN_F11,     KEY_SUSPEND,
3141
3142                 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
3143                 KEY_UNKNOWN,    /* 0x0C: FN+BACKSPACE */
3144                 KEY_UNKNOWN,    /* 0x0D: FN+INSERT */
3145                 KEY_UNKNOWN,    /* 0x0E: FN+DELETE */
3146
3147                 /* brightness: firmware always reacts to them */
3148                 KEY_RESERVED,   /* 0x0F: FN+HOME (brightness up) */
3149                 KEY_RESERVED,   /* 0x10: FN+END (brightness down) */
3150
3151                 /* Thinklight: firmware always react to it */
3152                 KEY_RESERVED,   /* 0x11: FN+PGUP (thinklight toggle) */
3153
3154                 KEY_UNKNOWN,    /* 0x12: FN+PGDOWN */
3155                 KEY_ZOOM,       /* 0x13: FN+SPACE (zoom) */
3156
3157                 /* Volume: firmware always react to it and reprograms
3158                  * the built-in *extra* mixer.  Never map it to control
3159                  * another mixer by default. */
3160                 KEY_RESERVED,   /* 0x14: VOLUME UP */
3161                 KEY_RESERVED,   /* 0x15: VOLUME DOWN */
3162                 KEY_RESERVED,   /* 0x16: MUTE */
3163
3164                 KEY_VENDOR,     /* 0x17: Thinkpad/AccessIBM/Lenovo */
3165
3166                 /* (assignments unknown, please report if found) */
3167                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3168                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3169                 },
3170
3171         /* Generic keymap for Lenovo ThinkPads */
3172         [TPACPI_KEYMAP_LENOVO_GENERIC] = {
3173                 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
3174                 KEY_FN_F1,      KEY_COFFEE,     KEY_BATTERY,    KEY_SLEEP,
3175                 KEY_WLAN,       KEY_CAMERA, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
3176                 KEY_FN_F9,      KEY_FN_F10,     KEY_FN_F11,     KEY_SUSPEND,
3177
3178                 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
3179                 KEY_UNKNOWN,    /* 0x0C: FN+BACKSPACE */
3180                 KEY_UNKNOWN,    /* 0x0D: FN+INSERT */
3181                 KEY_UNKNOWN,    /* 0x0E: FN+DELETE */
3182
3183                 /* These should be enabled --only-- when ACPI video
3184                  * is disabled (i.e. in "vendor" mode), and are handled
3185                  * in a special way by the init code */
3186                 KEY_BRIGHTNESSUP,       /* 0x0F: FN+HOME (brightness up) */
3187                 KEY_BRIGHTNESSDOWN,     /* 0x10: FN+END (brightness down) */
3188
3189                 KEY_RESERVED,   /* 0x11: FN+PGUP (thinklight toggle) */
3190
3191                 KEY_UNKNOWN,    /* 0x12: FN+PGDOWN */
3192                 KEY_ZOOM,       /* 0x13: FN+SPACE (zoom) */
3193
3194                 /* Volume: z60/z61, T60 (BIOS version?): firmware always
3195                  * react to it and reprograms the built-in *extra* mixer.
3196                  * Never map it to control another mixer by default.
3197                  *
3198                  * T60?, T61, R60?, R61: firmware and EC tries to send
3199                  * these over the regular keyboard, so these are no-ops,
3200                  * but there are still weird bugs re. MUTE, so do not
3201                  * change unless you get test reports from all Lenovo
3202                  * models.  May cause the BIOS to interfere with the
3203                  * HDA mixer.
3204                  */
3205                 KEY_RESERVED,   /* 0x14: VOLUME UP */
3206                 KEY_RESERVED,   /* 0x15: VOLUME DOWN */
3207                 KEY_RESERVED,   /* 0x16: MUTE */
3208
3209                 KEY_VENDOR,     /* 0x17: Thinkpad/AccessIBM/Lenovo */
3210
3211                 /* (assignments unknown, please report if found) */
3212                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3213                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3214                 },
3215         };
3216
3217         static const struct tpacpi_quirk tpacpi_keymap_qtable[] __initconst = {
3218                 /* Generic maps (fallback) */
3219                 {
3220                   .vendor = PCI_VENDOR_ID_IBM,
3221                   .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY,
3222                   .quirks = TPACPI_KEYMAP_IBM_GENERIC,
3223                 },
3224                 {
3225                   .vendor = PCI_VENDOR_ID_LENOVO,
3226                   .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY,
3227                   .quirks = TPACPI_KEYMAP_LENOVO_GENERIC,
3228                 },
3229         };
3230
3231 #define TPACPI_HOTKEY_MAP_SIZE          sizeof(tpacpi_keymap_t)
3232 #define TPACPI_HOTKEY_MAP_TYPESIZE      sizeof(tpacpi_keymap_entry_t)
3233
3234         int res, i;
3235         int status;
3236         int hkeyv;
3237         bool radiosw_state  = false;
3238         bool tabletsw_state = false;
3239
3240         unsigned long quirks;
3241         unsigned long keymap_id;
3242
3243         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3244                         "initializing hotkey subdriver\n");
3245
3246         BUG_ON(!tpacpi_inputdev);
3247         BUG_ON(tpacpi_inputdev->open != NULL ||
3248                tpacpi_inputdev->close != NULL);
3249
3250         TPACPI_ACPIHANDLE_INIT(hkey);
3251         mutex_init(&hotkey_mutex);
3252
3253 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
3254         mutex_init(&hotkey_thread_mutex);
3255         mutex_init(&hotkey_thread_data_mutex);
3256 #endif
3257
3258         /* hotkey not supported on 570 */
3259         tp_features.hotkey = hkey_handle != NULL;
3260
3261         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3262                 "hotkeys are %s\n",
3263                 str_supported(tp_features.hotkey));
3264
3265         if (!tp_features.hotkey)
3266                 return 1;
3267
3268         quirks = tpacpi_check_quirks(tpacpi_hotkey_qtable,
3269                                      ARRAY_SIZE(tpacpi_hotkey_qtable));
3270
3271         tpacpi_disable_brightness_delay();
3272
3273         /* MUST have enough space for all attributes to be added to
3274          * hotkey_dev_attributes */
3275         hotkey_dev_attributes = create_attr_set(
3276                                         ARRAY_SIZE(hotkey_attributes) + 2,
3277                                         NULL);
3278         if (!hotkey_dev_attributes)
3279                 return -ENOMEM;
3280         res = add_many_to_attr_set(hotkey_dev_attributes,
3281                         hotkey_attributes,
3282                         ARRAY_SIZE(hotkey_attributes));
3283         if (res)
3284                 goto err_exit;
3285
3286         /* mask not supported on 600e/x, 770e, 770x, A21e, A2xm/p,
3287            A30, R30, R31, T20-22, X20-21, X22-24.  Detected by checking
3288            for HKEY interface version 0x100 */
3289         if (acpi_evalf(hkey_handle, &hkeyv, "MHKV", "qd")) {
3290                 if ((hkeyv >> 8) != 1) {
3291                         printk(TPACPI_ERR "unknown version of the "
3292                                "HKEY interface: 0x%x\n", hkeyv);
3293                         printk(TPACPI_ERR "please report this to %s\n",
3294                                TPACPI_MAIL);
3295                 } else {
3296                         /*
3297                          * MHKV 0x100 in A31, R40, R40e,
3298                          * T4x, X31, and later
3299                          */
3300                         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3301                                 "firmware HKEY interface version: 0x%x\n",
3302                                 hkeyv);
3303
3304                         /* Paranoia check AND init hotkey_all_mask */
3305                         if (!acpi_evalf(hkey_handle, &hotkey_all_mask,
3306                                         "MHKA", "qd")) {
3307                                 printk(TPACPI_ERR
3308                                        "missing MHKA handler, "
3309                                        "please report this to %s\n",
3310                                        TPACPI_MAIL);
3311                                 /* Fallback: pre-init for FN+F3,F4,F12 */
3312                                 hotkey_all_mask = 0x080cU;
3313                         } else {
3314                                 tp_features.hotkey_mask = 1;
3315                         }
3316                 }
3317         }
3318
3319         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3320                 "hotkey masks are %s\n",
3321                 str_supported(tp_features.hotkey_mask));
3322
3323         /* Init hotkey_all_mask if not initialized yet */
3324         if (!tp_features.hotkey_mask && !hotkey_all_mask &&
3325             (quirks & TPACPI_HK_Q_INIMASK))
3326                 hotkey_all_mask = 0x080cU;  /* FN+F12, FN+F4, FN+F3 */
3327
3328         /* Init hotkey_acpi_mask and hotkey_orig_mask */
3329         if (tp_features.hotkey_mask) {
3330                 /* hotkey_source_mask *must* be zero for
3331                  * the first hotkey_mask_get to return hotkey_orig_mask */
3332                 res = hotkey_mask_get();
3333                 if (res)
3334                         goto err_exit;
3335
3336                 hotkey_orig_mask = hotkey_acpi_mask;
3337         } else {
3338                 hotkey_orig_mask = hotkey_all_mask;
3339                 hotkey_acpi_mask = hotkey_all_mask;
3340         }
3341
3342 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3343         if (dbg_wlswemul) {
3344                 tp_features.hotkey_wlsw = 1;
3345                 radiosw_state = !!tpacpi_wlsw_emulstate;
3346                 printk(TPACPI_INFO
3347                         "radio switch emulation enabled\n");
3348         } else
3349 #endif
3350         /* Not all thinkpads have a hardware radio switch */
3351         if (acpi_evalf(hkey_handle, &status, "WLSW", "qd")) {
3352                 tp_features.hotkey_wlsw = 1;
3353                 radiosw_state = !!status;
3354                 printk(TPACPI_INFO
3355                         "radio switch found; radios are %s\n",
3356                         enabled(status, 0));
3357         }
3358         if (tp_features.hotkey_wlsw)
3359                 res = add_to_attr_set(hotkey_dev_attributes,
3360                                 &dev_attr_hotkey_radio_sw.attr);
3361
3362         /* For X41t, X60t, X61t Tablets... */
3363         if (!res && acpi_evalf(hkey_handle, &status, "MHKG", "qd")) {
3364                 tp_features.hotkey_tablet = 1;
3365                 tabletsw_state = !!(status & TP_HOTKEY_TABLET_MASK);
3366                 printk(TPACPI_INFO
3367                         "possible tablet mode switch found; "
3368                         "ThinkPad in %s mode\n",
3369                         (tabletsw_state) ? "tablet" : "laptop");
3370                 res = add_to_attr_set(hotkey_dev_attributes,
3371                                 &dev_attr_hotkey_tablet_mode.attr);
3372         }
3373
3374         if (!res)
3375                 res = register_attr_set_with_sysfs(
3376                                 hotkey_dev_attributes,
3377                                 &tpacpi_pdev->dev.kobj);
3378         if (res)
3379                 goto err_exit;
3380
3381         /* Set up key map */
3382         hotkey_keycode_map = kmalloc(TPACPI_HOTKEY_MAP_SIZE,
3383                                         GFP_KERNEL);
3384         if (!hotkey_keycode_map) {
3385                 printk(TPACPI_ERR
3386                         "failed to allocate memory for key map\n");
3387                 res = -ENOMEM;
3388                 goto err_exit;
3389         }
3390
3391         keymap_id = tpacpi_check_quirks(tpacpi_keymap_qtable,
3392                                         ARRAY_SIZE(tpacpi_keymap_qtable));
3393         BUG_ON(keymap_id >= ARRAY_SIZE(tpacpi_keymaps));
3394         dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3395                    "using keymap number %lu\n", keymap_id);
3396
3397         memcpy(hotkey_keycode_map, &tpacpi_keymaps[keymap_id],
3398                 TPACPI_HOTKEY_MAP_SIZE);
3399
3400         input_set_capability(tpacpi_inputdev, EV_MSC, MSC_SCAN);
3401         tpacpi_inputdev->keycodesize = TPACPI_HOTKEY_MAP_TYPESIZE;
3402         tpacpi_inputdev->keycodemax = TPACPI_HOTKEY_MAP_LEN;
3403         tpacpi_inputdev->keycode = hotkey_keycode_map;
3404         for (i = 0; i < TPACPI_HOTKEY_MAP_LEN; i++) {
3405                 if (hotkey_keycode_map[i] != KEY_RESERVED) {
3406                         input_set_capability(tpacpi_inputdev, EV_KEY,
3407                                                 hotkey_keycode_map[i]);
3408                 } else {
3409                         if (i < sizeof(hotkey_reserved_mask)*8)
3410                                 hotkey_reserved_mask |= 1 << i;
3411                 }
3412         }
3413
3414         if (tp_features.hotkey_wlsw) {
3415                 input_set_capability(tpacpi_inputdev, EV_SW, SW_RFKILL_ALL);
3416                 input_report_switch(tpacpi_inputdev,
3417                                     SW_RFKILL_ALL, radiosw_state);
3418         }
3419         if (tp_features.hotkey_tablet) {
3420                 input_set_capability(tpacpi_inputdev, EV_SW, SW_TABLET_MODE);
3421                 input_report_switch(tpacpi_inputdev,
3422                                     SW_TABLET_MODE, tabletsw_state);
3423         }
3424
3425         /* Do not issue duplicate brightness change events to
3426          * userspace. tpacpi_detect_brightness_capabilities() must have
3427          * been called before this point  */
3428         if (tp_features.bright_acpimode && acpi_video_backlight_support()) {
3429                 printk(TPACPI_INFO
3430                        "This ThinkPad has standard ACPI backlight "
3431                        "brightness control, supported by the ACPI "
3432                        "video driver\n");
3433                 printk(TPACPI_NOTICE
3434                        "Disabling thinkpad-acpi brightness events "
3435                        "by default...\n");
3436
3437                 /* Disable brightness up/down on Lenovo thinkpads when
3438                  * ACPI is handling them, otherwise it is plain impossible
3439                  * for userspace to do something even remotely sane */
3440                 hotkey_reserved_mask |=
3441                         (1 << TP_ACPI_HOTKEYSCAN_FNHOME)
3442                         | (1 << TP_ACPI_HOTKEYSCAN_FNEND);
3443                 hotkey_unmap(TP_ACPI_HOTKEYSCAN_FNHOME);
3444                 hotkey_unmap(TP_ACPI_HOTKEYSCAN_FNEND);
3445         }
3446
3447 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
3448         hotkey_source_mask = TPACPI_HKEY_NVRAM_GOOD_MASK
3449                                 & ~hotkey_all_mask
3450                                 & ~hotkey_reserved_mask;
3451
3452         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3453                     "hotkey source mask 0x%08x, polling freq %u\n",
3454                     hotkey_source_mask, hotkey_poll_freq);
3455 #endif
3456
3457         dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3458                         "enabling firmware HKEY event interface...\n");
3459         res = hotkey_status_set(true);
3460         if (res) {
3461                 hotkey_exit();
3462                 return res;
3463         }
3464         res = hotkey_mask_set(((hotkey_all_mask & ~hotkey_reserved_mask)
3465                                | hotkey_driver_mask)
3466                               & ~hotkey_source_mask);
3467         if (res < 0 && res != -ENXIO) {
3468                 hotkey_exit();
3469                 return res;
3470         }
3471         hotkey_user_mask = (hotkey_acpi_mask | hotkey_source_mask)
3472                                 & ~hotkey_reserved_mask;
3473         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3474                 "initial masks: user=0x%08x, fw=0x%08x, poll=0x%08x\n",
3475                 hotkey_user_mask, hotkey_acpi_mask, hotkey_source_mask);
3476
3477         dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3478                         "legacy ibm/hotkey event reporting over procfs %s\n",
3479                         (hotkey_report_mode < 2) ?
3480                                 "enabled" : "disabled");
3481
3482         tpacpi_inputdev->open = &hotkey_inputdev_open;
3483         tpacpi_inputdev->close = &hotkey_inputdev_close;
3484
3485         hotkey_poll_setup_safe(true);
3486
3487         return 0;
3488
3489 err_exit:
3490         delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
3491         hotkey_dev_attributes = NULL;
3492
3493         return (res < 0)? res : 1;
3494 }
3495
3496 static bool hotkey_notify_hotkey(const u32 hkey,
3497                                  bool *send_acpi_ev,
3498                                  bool *ignore_acpi_ev)
3499 {
3500         /* 0x1000-0x1FFF: key presses */
3501         unsigned int scancode = hkey & 0xfff;
3502         *send_acpi_ev = true;
3503         *ignore_acpi_ev = false;
3504
3505         /* HKEY event 0x1001 is scancode 0x00 */
3506         if (scancode > 0 && scancode <= TPACPI_HOTKEY_MAP_LEN) {
3507                 scancode--;
3508                 if (!(hotkey_source_mask & (1 << scancode))) {
3509                         tpacpi_input_send_key_masked(scancode);
3510                         *send_acpi_ev = false;
3511                 } else {
3512                         *ignore_acpi_ev = true;
3513                 }
3514                 return true;
3515         }
3516         return false;
3517 }
3518
3519 static bool hotkey_notify_wakeup(const u32 hkey,
3520                                  bool *send_acpi_ev,
3521                                  bool *ignore_acpi_ev)
3522 {
3523         /* 0x2000-0x2FFF: Wakeup reason */
3524         *send_acpi_ev = true;
3525         *ignore_acpi_ev = false;
3526
3527         switch (hkey) {
3528         case TP_HKEY_EV_WKUP_S3_UNDOCK: /* suspend, undock */
3529         case TP_HKEY_EV_WKUP_S4_UNDOCK: /* hibernation, undock */
3530                 hotkey_wakeup_reason = TP_ACPI_WAKEUP_UNDOCK;
3531                 *ignore_acpi_ev = true;
3532                 break;
3533
3534         case TP_HKEY_EV_WKUP_S3_BAYEJ: /* suspend, bay eject */
3535         case TP_HKEY_EV_WKUP_S4_BAYEJ: /* hibernation, bay eject */
3536                 hotkey_wakeup_reason = TP_ACPI_WAKEUP_BAYEJ;
3537                 *ignore_acpi_ev = true;
3538                 break;
3539
3540         case TP_HKEY_EV_WKUP_S3_BATLOW: /* Battery on critical low level/S3 */
3541         case TP_HKEY_EV_WKUP_S4_BATLOW: /* Battery on critical low level/S4 */
3542                 printk(TPACPI_ALERT
3543                         "EMERGENCY WAKEUP: battery almost empty\n");
3544                 /* how to auto-heal: */
3545                 /* 2313: woke up from S3, go to S4/S5 */
3546                 /* 2413: woke up from S4, go to S5 */
3547                 break;
3548
3549         default:
3550                 return false;
3551         }
3552
3553         if (hotkey_wakeup_reason != TP_ACPI_WAKEUP_NONE) {
3554                 printk(TPACPI_INFO
3555                        "woke up due to a hot-unplug "
3556                        "request...\n");
3557                 hotkey_wakeup_reason_notify_change();
3558         }
3559         return true;
3560 }
3561
3562 static bool hotkey_notify_usrevent(const u32 hkey,
3563                                  bool *send_acpi_ev,
3564                                  bool *ignore_acpi_ev)
3565 {
3566         /* 0x5000-0x5FFF: human interface helpers */
3567         *send_acpi_ev = true;
3568         *ignore_acpi_ev = false;
3569
3570         switch (hkey) {
3571         case TP_HKEY_EV_PEN_INSERTED:  /* X61t: tablet pen inserted into bay */
3572         case TP_HKEY_EV_PEN_REMOVED:   /* X61t: tablet pen removed from bay */
3573                 return true;
3574
3575         case TP_HKEY_EV_TABLET_TABLET:   /* X41t-X61t: tablet mode */
3576         case TP_HKEY_EV_TABLET_NOTEBOOK: /* X41t-X61t: normal mode */
3577                 tpacpi_input_send_tabletsw();
3578                 hotkey_tablet_mode_notify_change();
3579                 *send_acpi_ev = false;
3580                 return true;
3581
3582         case TP_HKEY_EV_LID_CLOSE:      /* Lid closed */
3583         case TP_HKEY_EV_LID_OPEN:       /* Lid opened */
3584         case TP_HKEY_EV_BRGHT_CHANGED:  /* brightness changed */
3585                 /* do not propagate these events */
3586                 *ignore_acpi_ev = true;
3587                 return true;
3588
3589         default:
3590                 return false;
3591         }
3592 }
3593
3594 static void thermal_dump_all_sensors(void);
3595
3596 static bool hotkey_notify_thermal(const u32 hkey,
3597                                  bool *send_acpi_ev,
3598                                  bool *ignore_acpi_ev)
3599 {
3600         bool known = true;
3601
3602         /* 0x6000-0x6FFF: thermal alarms */
3603         *send_acpi_ev = true;
3604         *ignore_acpi_ev = false;
3605
3606         switch (hkey) {
3607         case TP_HKEY_EV_THM_TABLE_CHANGED:
3608                 printk(TPACPI_INFO
3609                         "EC reports that Thermal Table has changed\n");
3610                 /* recommended action: do nothing, we don't have
3611                  * Lenovo ATM information */
3612                 return true;
3613         case TP_HKEY_EV_ALARM_BAT_HOT:
3614                 printk(TPACPI_CRIT
3615                         "THERMAL ALARM: battery is too hot!\n");
3616                 /* recommended action: warn user through gui */
3617                 break;
3618         case TP_HKEY_EV_ALARM_BAT_XHOT:
3619                 printk(TPACPI_ALERT
3620                         "THERMAL EMERGENCY: battery is extremely hot!\n");
3621                 /* recommended action: immediate sleep/hibernate */
3622                 break;
3623         case TP_HKEY_EV_ALARM_SENSOR_HOT:
3624                 printk(TPACPI_CRIT
3625                         "THERMAL ALARM: "
3626                         "a sensor reports something is too hot!\n");
3627                 /* recommended action: warn user through gui, that */
3628                 /* some internal component is too hot */
3629                 break;
3630         case TP_HKEY_EV_ALARM_SENSOR_XHOT:
3631                 printk(TPACPI_ALERT
3632                         "THERMAL EMERGENCY: "
3633                         "a sensor reports something is extremely hot!\n");
3634                 /* recommended action: immediate sleep/hibernate */
3635                 break;
3636         default:
3637                 printk(TPACPI_ALERT
3638                          "THERMAL ALERT: unknown thermal alarm received\n");
3639                 known = false;
3640         }
3641
3642         thermal_dump_all_sensors();
3643
3644         return known;
3645 }
3646
3647 static void hotkey_notify(struct ibm_struct *ibm, u32 event)
3648 {
3649         u32 hkey;
3650         bool send_acpi_ev;
3651         bool ignore_acpi_ev;
3652         bool known_ev;
3653
3654         if (event != 0x80) {
3655                 printk(TPACPI_ERR
3656                        "unknown HKEY notification event %d\n", event);
3657                 /* forward it to userspace, maybe it knows how to handle it */
3658                 acpi_bus_generate_netlink_event(
3659                                         ibm->acpi->device->pnp.device_class,
3660                                         dev_name(&ibm->acpi->device->dev),
3661                                         event, 0);
3662                 return;
3663         }
3664
3665         while (1) {
3666                 if (!acpi_evalf(hkey_handle, &hkey, "MHKP", "d")) {
3667                         printk(TPACPI_ERR "failed to retrieve HKEY event\n");
3668                         return;
3669                 }
3670
3671                 if (hkey == 0) {
3672                         /* queue empty */
3673                         return;
3674                 }
3675
3676                 send_acpi_ev = true;
3677                 ignore_acpi_ev = false;
3678
3679                 switch (hkey >> 12) {
3680                 case 1:
3681                         /* 0x1000-0x1FFF: key presses */
3682                         known_ev = hotkey_notify_hotkey(hkey, &send_acpi_ev,
3683                                                  &ignore_acpi_ev);
3684                         break;
3685                 case 2:
3686                         /* 0x2000-0x2FFF: Wakeup reason */
3687                         known_ev = hotkey_notify_wakeup(hkey, &send_acpi_ev,
3688                                                  &ignore_acpi_ev);
3689                         break;
3690                 case 3:
3691                         /* 0x3000-0x3FFF: bay-related wakeups */
3692                         switch (hkey) {
3693                         case TP_HKEY_EV_BAYEJ_ACK:
3694                                 hotkey_autosleep_ack = 1;
3695                                 printk(TPACPI_INFO
3696                                        "bay ejected\n");
3697                                 hotkey_wakeup_hotunplug_complete_notify_change();
3698                                 known_ev = true;
3699                                 break;
3700                         case TP_HKEY_EV_OPTDRV_EJ:
3701                                 /* FIXME: kick libata if SATA link offline */
3702                                 known_ev = true;
3703                                 break;
3704                         default:
3705                                 known_ev = false;
3706                         }
3707                         break;
3708                 case 4:
3709                         /* 0x4000-0x4FFF: dock-related wakeups */
3710                         if (hkey == TP_HKEY_EV_UNDOCK_ACK) {
3711                                 hotkey_autosleep_ack = 1;
3712                                 printk(TPACPI_INFO
3713                                        "undocked\n");
3714                                 hotkey_wakeup_hotunplug_complete_notify_change();
3715                                 known_ev = true;
3716                         } else {
3717                                 known_ev = false;
3718                         }
3719                         break;
3720                 case 5:
3721                         /* 0x5000-0x5FFF: human interface helpers */
3722                         known_ev = hotkey_notify_usrevent(hkey, &send_acpi_ev,
3723                                                  &ignore_acpi_ev);
3724                         break;
3725                 case 6:
3726                         /* 0x6000-0x6FFF: thermal alarms */
3727                         known_ev = hotkey_notify_thermal(hkey, &send_acpi_ev,
3728                                                  &ignore_acpi_ev);
3729                         break;
3730                 case 7:
3731                         /* 0x7000-0x7FFF: misc */
3732                         if (tp_features.hotkey_wlsw &&
3733                                         hkey == TP_HKEY_EV_RFKILL_CHANGED) {
3734                                 tpacpi_send_radiosw_update();
3735                                 send_acpi_ev = 0;
3736                                 known_ev = true;
3737                                 break;
3738                         }
3739                         /* fallthrough to default */
3740                 default:
3741                         known_ev = false;
3742                 }
3743                 if (!known_ev) {
3744                         printk(TPACPI_NOTICE
3745                                "unhandled HKEY event 0x%04x\n", hkey);
3746                         printk(TPACPI_NOTICE
3747                                "please report the conditions when this "
3748                                "event happened to %s\n", TPACPI_MAIL);
3749                 }
3750
3751                 /* Legacy events */
3752                 if (!ignore_acpi_ev &&
3753                     (send_acpi_ev || hotkey_report_mode < 2)) {
3754                         acpi_bus_generate_proc_event(ibm->acpi->device,
3755                                                      event, hkey);
3756                 }
3757
3758                 /* netlink events */
3759                 if (!ignore_acpi_ev && send_acpi_ev) {
3760                         acpi_bus_generate_netlink_event(
3761                                         ibm->acpi->device->pnp.device_class,
3762                                         dev_name(&ibm->acpi->device->dev),
3763                                         event, hkey);
3764                 }
3765         }
3766 }
3767
3768 static void hotkey_suspend(pm_message_t state)
3769 {
3770         /* Do these on suspend, we get the events on early resume! */
3771         hotkey_wakeup_reason = TP_ACPI_WAKEUP_NONE;
3772         hotkey_autosleep_ack = 0;
3773 }
3774
3775 static void hotkey_resume(void)
3776 {
3777         tpacpi_disable_brightness_delay();
3778
3779         if (hotkey_status_set(true) < 0 ||
3780             hotkey_mask_set(hotkey_acpi_mask) < 0)
3781                 printk(TPACPI_ERR
3782                        "error while attempting to reset the event "
3783                        "firmware interface\n");
3784
3785         tpacpi_send_radiosw_update();
3786         hotkey_tablet_mode_notify_change();
3787         hotkey_wakeup_reason_notify_change();
3788         hotkey_wakeup_hotunplug_complete_notify_change();
3789         hotkey_poll_setup_safe(false);
3790 }
3791
3792 /* procfs -------------------------------------------------------------- */
3793 static int hotkey_read(struct seq_file *m)
3794 {
3795         int res, status;
3796
3797         if (!tp_features.hotkey) {
3798                 seq_printf(m, "status:\t\tnot supported\n");
3799                 return 0;
3800         }
3801
3802         if (mutex_lock_killable(&hotkey_mutex))
3803                 return -ERESTARTSYS;
3804         res = hotkey_status_get(&status);
3805         if (!res)
3806                 res = hotkey_mask_get();
3807         mutex_unlock(&hotkey_mutex);
3808         if (res)
3809                 return res;
3810
3811         seq_printf(m, "status:\t\t%s\n", enabled(status, 0));
3812         if (hotkey_all_mask) {
3813                 seq_printf(m, "mask:\t\t0x%08x\n", hotkey_user_mask);
3814                 seq_printf(m, "commands:\tenable, disable, reset, <mask>\n");
3815         } else {
3816                 seq_printf(m, "mask:\t\tnot supported\n");
3817                 seq_printf(m, "commands:\tenable, disable, reset\n");
3818         }
3819
3820         return 0;
3821 }
3822
3823 static void hotkey_enabledisable_warn(bool enable)
3824 {
3825         tpacpi_log_usertask("procfs hotkey enable/disable");
3826         if (!WARN((tpacpi_lifecycle == TPACPI_LIFE_RUNNING || !enable),
3827                         TPACPI_WARN
3828                         "hotkey enable/disable functionality has been "
3829                         "removed from the driver.  Hotkeys are always "
3830                         "enabled\n"))
3831                 printk(TPACPI_ERR
3832                         "Please remove the hotkey=enable module "
3833                         "parameter, it is deprecated.  Hotkeys are always "
3834                         "enabled\n");
3835 }
3836
3837 static int hotkey_write(char *buf)
3838 {
3839         int res;
3840         u32 mask;
3841         char *cmd;
3842
3843         if (!tp_features.hotkey)
3844                 return -ENODEV;
3845
3846         if (mutex_lock_killable(&hotkey_mutex))
3847                 return -ERESTARTSYS;
3848
3849         mask = hotkey_user_mask;
3850
3851         res = 0;
3852         while ((cmd = next_cmd(&buf))) {
3853                 if (strlencmp(cmd, "enable") == 0) {
3854                         hotkey_enabledisable_warn(1);
3855                 } else if (strlencmp(cmd, "disable") == 0) {
3856                         hotkey_enabledisable_warn(0);
3857                         res = -EPERM;
3858                 } else if (strlencmp(cmd, "reset") == 0) {
3859                         mask = (hotkey_all_mask | hotkey_source_mask)
3860                                 & ~hotkey_reserved_mask;
3861                 } else if (sscanf(cmd, "0x%x", &mask) == 1) {
3862                         /* mask set */
3863                 } else if (sscanf(cmd, "%x", &mask) == 1) {
3864                         /* mask set */
3865                 } else {
3866                         res = -EINVAL;
3867                         goto errexit;
3868                 }
3869         }
3870
3871         if (!res) {
3872                 tpacpi_disclose_usertask("procfs hotkey",
3873                         "set mask to 0x%08x\n", mask);
3874                 res = hotkey_user_mask_set(mask);
3875         }
3876
3877 errexit:
3878         mutex_unlock(&hotkey_mutex);
3879         return res;
3880 }
3881
3882 static const struct acpi_device_id ibm_htk_device_ids[] = {
3883         {TPACPI_ACPI_IBM_HKEY_HID, 0},
3884         {TPACPI_ACPI_LENOVO_HKEY_HID, 0},
3885         {"", 0},
3886 };
3887
3888 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver = {
3889         .hid = ibm_htk_device_ids,
3890         .notify = hotkey_notify,
3891         .handle = &hkey_handle,
3892         .type = ACPI_DEVICE_NOTIFY,
3893 };
3894
3895 static struct ibm_struct hotkey_driver_data = {
3896         .name = "hotkey",
3897         .read = hotkey_read,
3898         .write = hotkey_write,
3899         .exit = hotkey_exit,
3900         .resume = hotkey_resume,
3901         .suspend = hotkey_suspend,
3902         .acpi = &ibm_hotkey_acpidriver,
3903 };
3904
3905 /*************************************************************************
3906  * Bluetooth subdriver
3907  */
3908
3909 enum {
3910         /* ACPI GBDC/SBDC bits */
3911         TP_ACPI_BLUETOOTH_HWPRESENT     = 0x01, /* Bluetooth hw available */
3912         TP_ACPI_BLUETOOTH_RADIOSSW      = 0x02, /* Bluetooth radio enabled */
3913         TP_ACPI_BLUETOOTH_RESUMECTRL    = 0x04, /* Bluetooth state at resume:
3914                                                    0 = disable, 1 = enable */
3915 };
3916
3917 enum {
3918         /* ACPI \BLTH commands */
3919         TP_ACPI_BLTH_GET_ULTRAPORT_ID   = 0x00, /* Get Ultraport BT ID */
3920         TP_ACPI_BLTH_GET_PWR_ON_RESUME  = 0x01, /* Get power-on-resume state */
3921         TP_ACPI_BLTH_PWR_ON_ON_RESUME   = 0x02, /* Resume powered on */
3922         TP_ACPI_BLTH_PWR_OFF_ON_RESUME  = 0x03, /* Resume powered off */
3923         TP_ACPI_BLTH_SAVE_STATE         = 0x05, /* Save state for S4/S5 */
3924 };
3925
3926 #define TPACPI_RFK_BLUETOOTH_SW_NAME    "tpacpi_bluetooth_sw"
3927
3928 static int bluetooth_get_status(void)
3929 {
3930         int status;
3931
3932 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3933         if (dbg_bluetoothemul)
3934                 return (tpacpi_bluetooth_emulstate) ?
3935                        TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
3936 #endif
3937
3938         if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
3939                 return -EIO;
3940
3941         return ((status & TP_ACPI_BLUETOOTH_RADIOSSW) != 0) ?
3942                         TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
3943 }
3944
3945 static int bluetooth_set_status(enum tpacpi_rfkill_state state)
3946 {
3947         int status;
3948
3949         vdbg_printk(TPACPI_DBG_RFKILL,
3950                 "will attempt to %s bluetooth\n",
3951                 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable");
3952
3953 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3954         if (dbg_bluetoothemul) {
3955                 tpacpi_bluetooth_emulstate = (state == TPACPI_RFK_RADIO_ON);
3956                 return 0;
3957         }
3958 #endif
3959
3960         if (state == TPACPI_RFK_RADIO_ON)
3961                 status = TP_ACPI_BLUETOOTH_RADIOSSW
3962                           | TP_ACPI_BLUETOOTH_RESUMECTRL;
3963         else
3964                 status = 0;
3965
3966         if (!acpi_evalf(hkey_handle, NULL, "SBDC", "vd", status))
3967                 return -EIO;
3968
3969         return 0;
3970 }
3971
3972 /* sysfs bluetooth enable ---------------------------------------------- */
3973 static ssize_t bluetooth_enable_show(struct device *dev,
3974                            struct device_attribute *attr,
3975                            char *buf)
3976 {
3977         return tpacpi_rfk_sysfs_enable_show(TPACPI_RFK_BLUETOOTH_SW_ID,
3978                         attr, buf);
3979 }
3980
3981 static ssize_t bluetooth_enable_store(struct device *dev,
3982                             struct device_attribute *attr,
3983                             const char *buf, size_t count)
3984 {
3985         return tpacpi_rfk_sysfs_enable_store(TPACPI_RFK_BLUETOOTH_SW_ID,
3986                                 attr, buf, count);
3987 }
3988
3989 static struct device_attribute dev_attr_bluetooth_enable =
3990         __ATTR(bluetooth_enable, S_IWUSR | S_IRUGO,
3991                 bluetooth_enable_show, bluetooth_enable_store);
3992
3993 /* --------------------------------------------------------------------- */
3994
3995 static struct attribute *bluetooth_attributes[] = {
3996         &dev_attr_bluetooth_enable.attr,
3997         NULL
3998 };
3999
4000 static const struct attribute_group bluetooth_attr_group = {
4001         .attrs = bluetooth_attributes,
4002 };
4003
4004 static const struct tpacpi_rfk_ops bluetooth_tprfk_ops = {
4005         .get_status = bluetooth_get_status,
4006         .set_status = bluetooth_set_status,
4007 };
4008
4009 static void bluetooth_shutdown(void)
4010 {
4011         /* Order firmware to save current state to NVRAM */
4012         if (!acpi_evalf(NULL, NULL, "\\BLTH", "vd",
4013                         TP_ACPI_BLTH_SAVE_STATE))
4014                 printk(TPACPI_NOTICE
4015                         "failed to save bluetooth state to NVRAM\n");
4016         else
4017                 vdbg_printk(TPACPI_DBG_RFKILL,
4018                         "bluestooth state saved to NVRAM\n");
4019 }
4020
4021 static void bluetooth_exit(void)
4022 {
4023         sysfs_remove_group(&tpacpi_pdev->dev.kobj,
4024                         &bluetooth_attr_group);
4025
4026         tpacpi_destroy_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID);
4027
4028         bluetooth_shutdown();
4029 }
4030
4031 static int __init bluetooth_init(struct ibm_init_struct *iibm)
4032 {
4033         int res;
4034         int status = 0;
4035
4036         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4037                         "initializing bluetooth subdriver\n");
4038
4039         TPACPI_ACPIHANDLE_INIT(hkey);
4040
4041         /* bluetooth not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
4042            G4x, R30, R31, R40e, R50e, T20-22, X20-21 */
4043         tp_features.bluetooth = hkey_handle &&
4044             acpi_evalf(hkey_handle, &status, "GBDC", "qd");
4045
4046         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4047                 "bluetooth is %s, status 0x%02x\n",
4048                 str_supported(tp_features.bluetooth),
4049                 status);
4050
4051 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4052         if (dbg_bluetoothemul) {
4053                 tp_features.bluetooth = 1;
4054                 printk(TPACPI_INFO
4055                         "bluetooth switch emulation enabled\n");
4056         } else
4057 #endif
4058         if (tp_features.bluetooth &&
4059             !(status & TP_ACPI_BLUETOOTH_HWPRESENT)) {
4060                 /* no bluetooth hardware present in system */
4061                 tp_features.bluetooth = 0;
4062                 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4063                            "bluetooth hardware not installed\n");
4064         }
4065
4066         if (!tp_features.bluetooth)
4067                 return 1;
4068
4069         res = tpacpi_new_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID,
4070                                 &bluetooth_tprfk_ops,
4071                                 RFKILL_TYPE_BLUETOOTH,
4072                                 TPACPI_RFK_BLUETOOTH_SW_NAME,
4073                                 true);
4074         if (res)
4075                 return res;
4076
4077         res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
4078                                 &bluetooth_attr_group);
4079         if (res) {
4080                 tpacpi_destroy_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID);
4081                 return res;
4082         }
4083
4084         return 0;
4085 }
4086
4087 /* procfs -------------------------------------------------------------- */
4088 static int bluetooth_read(struct seq_file *m)
4089 {
4090         return tpacpi_rfk_procfs_read(TPACPI_RFK_BLUETOOTH_SW_ID, m);
4091 }
4092
4093 static int bluetooth_write(char *buf)
4094 {
4095         return tpacpi_rfk_procfs_write(TPACPI_RFK_BLUETOOTH_SW_ID, buf);
4096 }
4097
4098 static struct ibm_struct bluetooth_driver_data = {
4099         .name = "bluetooth",
4100         .read = bluetooth_read,
4101         .write = bluetooth_write,
4102         .exit = bluetooth_exit,
4103         .shutdown = bluetooth_shutdown,
4104 };
4105
4106 /*************************************************************************
4107  * Wan subdriver
4108  */
4109
4110 enum {
4111         /* ACPI GWAN/SWAN bits */
4112         TP_ACPI_WANCARD_HWPRESENT       = 0x01, /* Wan hw available */
4113         TP_ACPI_WANCARD_RADIOSSW        = 0x02, /* Wan radio enabled */
4114         TP_ACPI_WANCARD_RESUMECTRL      = 0x04, /* Wan state at resume:
4115                                                    0 = disable, 1 = enable */
4116 };
4117
4118 #define TPACPI_RFK_WWAN_SW_NAME         "tpacpi_wwan_sw"
4119
4120 static int wan_get_status(void)
4121 {
4122         int status;
4123
4124 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4125         if (dbg_wwanemul)
4126                 return (tpacpi_wwan_emulstate) ?
4127                        TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4128 #endif
4129
4130         if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
4131                 return -EIO;
4132
4133         return ((status & TP_ACPI_WANCARD_RADIOSSW) != 0) ?
4134                         TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4135 }
4136
4137 static int wan_set_status(enum tpacpi_rfkill_state state)
4138 {
4139         int status;
4140
4141         vdbg_printk(TPACPI_DBG_RFKILL,
4142                 "will attempt to %s wwan\n",
4143                 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable");
4144
4145 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4146         if (dbg_wwanemul) {
4147                 tpacpi_wwan_emulstate = (state == TPACPI_RFK_RADIO_ON);
4148                 return 0;
4149         }
4150 #endif
4151
4152         if (state == TPACPI_RFK_RADIO_ON)
4153                 status = TP_ACPI_WANCARD_RADIOSSW
4154                          | TP_ACPI_WANCARD_RESUMECTRL;
4155         else
4156                 status = 0;
4157
4158         if (!acpi_evalf(hkey_handle, NULL, "SWAN", "vd", status))
4159                 return -EIO;
4160
4161         return 0;
4162 }
4163
4164 /* sysfs wan enable ---------------------------------------------------- */
4165 static ssize_t wan_enable_show(struct device *dev,
4166                            struct device_attribute *attr,
4167                            char *buf)
4168 {
4169         return tpacpi_rfk_sysfs_enable_show(TPACPI_RFK_WWAN_SW_ID,
4170                         attr, buf);
4171 }
4172
4173 static ssize_t wan_enable_store(struct device *dev,
4174                             struct device_attribute *attr,
4175                             const char *buf, size_t count)
4176 {
4177         return tpacpi_rfk_sysfs_enable_store(TPACPI_RFK_WWAN_SW_ID,
4178                         attr, buf, count);
4179 }
4180
4181 static struct device_attribute dev_attr_wan_enable =
4182         __ATTR(wwan_enable, S_IWUSR | S_IRUGO,
4183                 wan_enable_show, wan_enable_store);
4184
4185 /* --------------------------------------------------------------------- */
4186
4187 static struct attribute *wan_attributes[] = {
4188         &dev_attr_wan_enable.attr,
4189         NULL
4190 };
4191
4192 static const struct attribute_group wan_attr_group = {
4193         .attrs = wan_attributes,
4194 };
4195
4196 static const struct tpacpi_rfk_ops wan_tprfk_ops = {
4197         .get_status = wan_get_status,
4198         .set_status = wan_set_status,
4199 };
4200
4201 static void wan_shutdown(void)
4202 {
4203         /* Order firmware to save current state to NVRAM */
4204         if (!acpi_evalf(NULL, NULL, "\\WGSV", "vd",
4205                         TP_ACPI_WGSV_SAVE_STATE))
4206                 printk(TPACPI_NOTICE
4207                         "failed to save WWAN state to NVRAM\n");
4208         else
4209                 vdbg_printk(TPACPI_DBG_RFKILL,
4210                         "WWAN state saved to NVRAM\n");
4211 }
4212
4213 static void wan_exit(void)
4214 {
4215         sysfs_remove_group(&tpacpi_pdev->dev.kobj,
4216                 &wan_attr_group);
4217
4218         tpacpi_destroy_rfkill(TPACPI_RFK_WWAN_SW_ID);
4219
4220         wan_shutdown();
4221 }
4222
4223 static int __init wan_init(struct ibm_init_struct *iibm)
4224 {
4225         int res;
4226         int status = 0;
4227
4228         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4229                         "initializing wan subdriver\n");
4230
4231         TPACPI_ACPIHANDLE_INIT(hkey);
4232
4233         tp_features.wan = hkey_handle &&
4234             acpi_evalf(hkey_handle, &status, "GWAN", "qd");
4235
4236         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4237                 "wan is %s, status 0x%02x\n",
4238                 str_supported(tp_features.wan),
4239                 status);
4240
4241 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4242         if (dbg_wwanemul) {
4243                 tp_features.wan = 1;
4244                 printk(TPACPI_INFO
4245                         "wwan switch emulation enabled\n");
4246         } else
4247 #endif
4248         if (tp_features.wan &&
4249             !(status & TP_ACPI_WANCARD_HWPRESENT)) {
4250                 /* no wan hardware present in system */
4251                 tp_features.wan = 0;
4252                 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4253                            "wan hardware not installed\n");
4254         }
4255
4256         if (!tp_features.wan)
4257                 return 1;
4258
4259         res = tpacpi_new_rfkill(TPACPI_RFK_WWAN_SW_ID,
4260                                 &wan_tprfk_ops,
4261                                 RFKILL_TYPE_WWAN,
4262                                 TPACPI_RFK_WWAN_SW_NAME,
4263                                 true);
4264         if (res)
4265                 return res;
4266
4267         res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
4268                                 &wan_attr_group);
4269
4270         if (res) {
4271                 tpacpi_destroy_rfkill(TPACPI_RFK_WWAN_SW_ID);
4272                 return res;
4273         }
4274
4275         return 0;
4276 }
4277
4278 /* procfs -------------------------------------------------------------- */
4279 static int wan_read(struct seq_file *m)
4280 {
4281         return tpacpi_rfk_procfs_read(TPACPI_RFK_WWAN_SW_ID, m);
4282 }
4283
4284 static int wan_write(char *buf)
4285 {
4286         return tpacpi_rfk_procfs_write(TPACPI_RFK_WWAN_SW_ID, buf);
4287 }
4288
4289 static struct ibm_struct wan_driver_data = {
4290         .name = "wan",
4291         .read = wan_read,
4292         .write = wan_write,
4293         .exit = wan_exit,
4294         .shutdown = wan_shutdown,
4295 };
4296
4297 /*************************************************************************
4298  * UWB subdriver
4299  */
4300
4301 enum {
4302         /* ACPI GUWB/SUWB bits */
4303         TP_ACPI_UWB_HWPRESENT   = 0x01, /* UWB hw available */
4304         TP_ACPI_UWB_RADIOSSW    = 0x02, /* UWB radio enabled */
4305 };
4306
4307 #define TPACPI_RFK_UWB_SW_NAME  "tpacpi_uwb_sw"
4308
4309 static int uwb_get_status(void)
4310 {
4311         int status;
4312
4313 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4314         if (dbg_uwbemul)
4315                 return (tpacpi_uwb_emulstate) ?
4316                        TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4317 #endif
4318
4319         if (!acpi_evalf(hkey_handle, &status, "GUWB", "d"))
4320                 return -EIO;
4321
4322         return ((status & TP_ACPI_UWB_RADIOSSW) != 0) ?
4323                         TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4324 }
4325
4326 static int uwb_set_status(enum tpacpi_rfkill_state state)
4327 {
4328         int status;
4329
4330         vdbg_printk(TPACPI_DBG_RFKILL,
4331                 "will attempt to %s UWB\n",
4332                 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable");
4333
4334 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4335         if (dbg_uwbemul) {
4336                 tpacpi_uwb_emulstate = (state == TPACPI_RFK_RADIO_ON);
4337                 return 0;
4338         }
4339 #endif
4340
4341         if (state == TPACPI_RFK_RADIO_ON)
4342                 status = TP_ACPI_UWB_RADIOSSW;
4343         else
4344                 status = 0;
4345
4346         if (!acpi_evalf(hkey_handle, NULL, "SUWB", "vd", status))
4347                 return -EIO;
4348
4349         return 0;
4350 }
4351
4352 /* --------------------------------------------------------------------- */
4353
4354 static const struct tpacpi_rfk_ops uwb_tprfk_ops = {
4355         .get_status = uwb_get_status,
4356         .set_status = uwb_set_status,
4357 };
4358
4359 static void uwb_exit(void)
4360 {
4361         tpacpi_destroy_rfkill(TPACPI_RFK_UWB_SW_ID);
4362 }
4363
4364 static int __init uwb_init(struct ibm_init_struct *iibm)
4365 {
4366         int res;
4367         int status = 0;
4368
4369         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4370                         "initializing uwb subdriver\n");
4371
4372         TPACPI_ACPIHANDLE_INIT(hkey);
4373
4374         tp_features.uwb = hkey_handle &&
4375             acpi_evalf(hkey_handle, &status, "GUWB", "qd");
4376
4377         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4378                 "uwb is %s, status 0x%02x\n",
4379                 str_supported(tp_features.uwb),
4380                 status);
4381
4382 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4383         if (dbg_uwbemul) {
4384                 tp_features.uwb = 1;
4385                 printk(TPACPI_INFO
4386                         "uwb switch emulation enabled\n");
4387         } else
4388 #endif
4389         if (tp_features.uwb &&
4390             !(status & TP_ACPI_UWB_HWPRESENT)) {
4391                 /* no uwb hardware present in system */
4392                 tp_features.uwb = 0;
4393                 dbg_printk(TPACPI_DBG_INIT,
4394                            "uwb hardware not installed\n");
4395         }
4396
4397         if (!tp_features.uwb)
4398                 return 1;
4399
4400         res = tpacpi_new_rfkill(TPACPI_RFK_UWB_SW_ID,
4401                                 &uwb_tprfk_ops,
4402                                 RFKILL_TYPE_UWB,
4403                                 TPACPI_RFK_UWB_SW_NAME,
4404                                 false);
4405         return res;
4406 }
4407
4408 static struct ibm_struct uwb_driver_data = {
4409         .name = "uwb",
4410         .exit = uwb_exit,
4411         .flags.experimental = 1,
4412 };
4413
4414 /*************************************************************************
4415  * Video subdriver
4416  */
4417
4418 #ifdef CONFIG_THINKPAD_ACPI_VIDEO
4419
4420 enum video_access_mode {
4421         TPACPI_VIDEO_NONE = 0,
4422         TPACPI_VIDEO_570,       /* 570 */
4423         TPACPI_VIDEO_770,       /* 600e/x, 770e, 770x */
4424         TPACPI_VIDEO_NEW,       /* all others */
4425 };
4426
4427 enum {  /* video status flags, based on VIDEO_570 */
4428         TP_ACPI_VIDEO_S_LCD = 0x01,     /* LCD output enabled */
4429         TP_ACPI_VIDEO_S_CRT = 0x02,     /* CRT output enabled */
4430         TP_ACPI_VIDEO_S_DVI = 0x08,     /* DVI output enabled */
4431 };
4432
4433 enum {  /* TPACPI_VIDEO_570 constants */
4434         TP_ACPI_VIDEO_570_PHSCMD = 0x87,        /* unknown magic constant :( */
4435         TP_ACPI_VIDEO_570_PHSMASK = 0x03,       /* PHS bits that map to
4436                                                  * video_status_flags */
4437         TP_ACPI_VIDEO_570_PHS2CMD = 0x8b,       /* unknown magic constant :( */
4438         TP_ACPI_VIDEO_570_PHS2SET = 0x80,       /* unknown magic constant :( */
4439 };
4440
4441 static enum video_access_mode video_supported;
4442 static int video_orig_autosw;
4443
4444 static int video_autosw_get(void);
4445 static int video_autosw_set(int enable);
4446
4447 TPACPI_HANDLE(vid2, root, "\\_SB.PCI0.AGPB.VID");       /* G41 */
4448
4449 static int __init video_init(struct ibm_init_struct *iibm)
4450 {
4451         int ivga;
4452
4453         vdbg_printk(TPACPI_DBG_INIT, "initializing video subdriver\n");
4454
4455         TPACPI_ACPIHANDLE_INIT(vid);
4456         if (tpacpi_is_ibm())
4457                 TPACPI_ACPIHANDLE_INIT(vid2);
4458
4459         if (vid2_handle && acpi_evalf(NULL, &ivga, "\\IVGA", "d") && ivga)
4460                 /* G41, assume IVGA doesn't change */
4461                 vid_handle = vid2_handle;
4462
4463         if (!vid_handle)
4464                 /* video switching not supported on R30, R31 */
4465                 video_supported = TPACPI_VIDEO_NONE;
4466         else if (tpacpi_is_ibm() &&
4467                  acpi_evalf(vid_handle, &video_orig_autosw, "SWIT", "qd"))
4468                 /* 570 */
4469                 video_supported = TPACPI_VIDEO_570;
4470         else if (tpacpi_is_ibm() &&
4471                  acpi_evalf(vid_handle, &video_orig_autosw, "^VADL", "qd"))
4472                 /* 600e/x, 770e, 770x */
4473                 video_supported = TPACPI_VIDEO_770;
4474         else
4475                 /* all others */
4476                 video_supported = TPACPI_VIDEO_NEW;
4477
4478         vdbg_printk(TPACPI_DBG_INIT, "video is %s, mode %d\n",
4479                 str_supported(video_supported != TPACPI_VIDEO_NONE),
4480                 video_supported);
4481
4482         return (video_supported != TPACPI_VIDEO_NONE)? 0 : 1;
4483 }
4484
4485 static void video_exit(void)
4486 {
4487         dbg_printk(TPACPI_DBG_EXIT,
4488                    "restoring original video autoswitch mode\n");
4489         if (video_autosw_set(video_orig_autosw))
4490                 printk(TPACPI_ERR "error while trying to restore original "
4491                         "video autoswitch mode\n");
4492 }
4493
4494 static int video_outputsw_get(void)
4495 {
4496         int status = 0;
4497         int i;
4498
4499         switch (video_supported) {
4500         case TPACPI_VIDEO_570:
4501                 if (!acpi_evalf(NULL, &i, "\\_SB.PHS", "dd",
4502                                  TP_ACPI_VIDEO_570_PHSCMD))
4503                         return -EIO;
4504                 status = i & TP_ACPI_VIDEO_570_PHSMASK;
4505                 break;
4506         case TPACPI_VIDEO_770:
4507                 if (!acpi_evalf(NULL, &i, "\\VCDL", "d"))
4508                         return -EIO;
4509                 if (i)
4510                         status |= TP_ACPI_VIDEO_S_LCD;
4511                 if (!acpi_evalf(NULL, &i, "\\VCDC", "d"))
4512                         return -EIO;
4513                 if (i)
4514                         status |= TP_ACPI_VIDEO_S_CRT;
4515                 break;
4516         case TPACPI_VIDEO_NEW:
4517                 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 1) ||
4518                     !acpi_evalf(NULL, &i, "\\VCDC", "d"))
4519                         return -EIO;
4520                 if (i)
4521                         status |= TP_ACPI_VIDEO_S_CRT;
4522
4523                 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0) ||
4524                     !acpi_evalf(NULL, &i, "\\VCDL", "d"))
4525                         return -EIO;
4526                 if (i)
4527                         status |= TP_ACPI_VIDEO_S_LCD;
4528                 if (!acpi_evalf(NULL, &i, "\\VCDD", "d"))
4529                         return -EIO;
4530                 if (i)
4531                         status |= TP_ACPI_VIDEO_S_DVI;
4532                 break;
4533         default:
4534                 return -ENOSYS;
4535         }
4536
4537         return status;
4538 }
4539
4540 static int video_outputsw_set(int status)
4541 {
4542         int autosw;
4543         int res = 0;
4544
4545         switch (video_supported) {
4546         case TPACPI_VIDEO_570:
4547                 res = acpi_evalf(NULL, NULL,
4548                                  "\\_SB.PHS2", "vdd",
4549                                  TP_ACPI_VIDEO_570_PHS2CMD,
4550                                  status | TP_ACPI_VIDEO_570_PHS2SET);
4551                 break;
4552         case TPACPI_VIDEO_770:
4553                 autosw = video_autosw_get();
4554                 if (autosw < 0)
4555                         return autosw;
4556
4557                 res = video_autosw_set(1);
4558                 if (res)
4559                         return res;
4560                 res = acpi_evalf(vid_handle, NULL,
4561                                  "ASWT", "vdd", status * 0x100, 0);
4562                 if (!autosw && video_autosw_set(autosw)) {
4563                         printk(TPACPI_ERR
4564                                "video auto-switch left enabled due to error\n");
4565                         return -EIO;
4566                 }
4567                 break;
4568         case TPACPI_VIDEO_NEW:
4569                 res = acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0x80) &&
4570                       acpi_evalf(NULL, NULL, "\\VSDS", "vdd", status, 1);
4571                 break;
4572         default:
4573                 return -ENOSYS;
4574         }
4575
4576         return (res)? 0 : -EIO;
4577 }
4578
4579 static int video_autosw_get(void)
4580 {
4581         int autosw = 0;
4582
4583         switch (video_supported) {
4584         case TPACPI_VIDEO_570:
4585                 if (!acpi_evalf(vid_handle, &autosw, "SWIT", "d"))
4586                         return -EIO;
4587                 break;
4588         case TPACPI_VIDEO_770:
4589         case TPACPI_VIDEO_NEW:
4590                 if (!acpi_evalf(vid_handle, &autosw, "^VDEE", "d"))
4591                         return -EIO;
4592                 break;
4593         default:
4594                 return -ENOSYS;
4595         }
4596
4597         return autosw & 1;
4598 }
4599
4600 static int video_autosw_set(int enable)
4601 {
4602         if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", (enable)? 1 : 0))
4603                 return -EIO;
4604         return 0;
4605 }
4606
4607 static int video_outputsw_cycle(void)
4608 {
4609         int autosw = video_autosw_get();
4610         int res;
4611
4612         if (autosw < 0)
4613                 return autosw;
4614
4615         switch (video_supported) {
4616         case TPACPI_VIDEO_570:
4617                 res = video_autosw_set(1);
4618                 if (res)
4619                         return res;
4620                 res = acpi_evalf(ec_handle, NULL, "_Q16", "v");
4621                 break;
4622         case TPACPI_VIDEO_770:
4623         case TPACPI_VIDEO_NEW:
4624                 res = video_autosw_set(1);
4625                 if (res)
4626                         return res;
4627                 res = acpi_evalf(vid_handle, NULL, "VSWT", "v");
4628                 break;
4629         default:
4630                 return -ENOSYS;
4631         }
4632         if (!autosw && video_autosw_set(autosw)) {
4633                 printk(TPACPI_ERR
4634                        "video auto-switch left enabled due to error\n");
4635                 return -EIO;
4636         }
4637
4638         return (res)? 0 : -EIO;
4639 }
4640
4641 static int video_expand_toggle(void)
4642 {
4643         switch (video_supported) {
4644         case TPACPI_VIDEO_570:
4645                 return acpi_evalf(ec_handle, NULL, "_Q17", "v")?
4646                         0 : -EIO;
4647         case TPACPI_VIDEO_770:
4648                 return acpi_evalf(vid_handle, NULL, "VEXP", "v")?
4649                         0 : -EIO;
4650         case TPACPI_VIDEO_NEW:
4651                 return acpi_evalf(NULL, NULL, "\\VEXP", "v")?
4652                         0 : -EIO;
4653         default:
4654                 return -ENOSYS;
4655         }
4656         /* not reached */
4657 }
4658
4659 static int video_read(struct seq_file *m)
4660 {
4661         int status, autosw;
4662
4663         if (video_supported == TPACPI_VIDEO_NONE) {
4664                 seq_printf(m, "status:\t\tnot supported\n");
4665                 return 0;
4666         }
4667
4668         /* Even reads can crash X.org, so... */
4669         if (!capable(CAP_SYS_ADMIN))
4670                 return -EPERM;
4671
4672         status = video_outputsw_get();
4673         if (status < 0)
4674                 return status;
4675
4676         autosw = video_autosw_get();
4677         if (autosw < 0)
4678                 return autosw;
4679
4680         seq_printf(m, "status:\t\tsupported\n");
4681         seq_printf(m, "lcd:\t\t%s\n", enabled(status, 0));
4682         seq_printf(m, "crt:\t\t%s\n", enabled(status, 1));
4683         if (video_supported == TPACPI_VIDEO_NEW)
4684                 seq_printf(m, "dvi:\t\t%s\n", enabled(status, 3));
4685         seq_printf(m, "auto:\t\t%s\n", enabled(autosw, 0));
4686         seq_printf(m, "commands:\tlcd_enable, lcd_disable\n");
4687         seq_printf(m, "commands:\tcrt_enable, crt_disable\n");
4688         if (video_supported == TPACPI_VIDEO_NEW)
4689                 seq_printf(m, "commands:\tdvi_enable, dvi_disable\n");
4690         seq_printf(m, "commands:\tauto_enable, auto_disable\n");
4691         seq_printf(m, "commands:\tvideo_switch, expand_toggle\n");
4692
4693         return 0;
4694 }
4695
4696 static int video_write(char *buf)
4697 {
4698         char *cmd;
4699         int enable, disable, status;
4700         int res;
4701
4702         if (video_supported == TPACPI_VIDEO_NONE)
4703                 return -ENODEV;
4704
4705         /* Even reads can crash X.org, let alone writes... */
4706         if (!capable(CAP_SYS_ADMIN))
4707                 return -EPERM;
4708
4709         enable = 0;
4710         disable = 0;
4711
4712         while ((cmd = next_cmd(&buf))) {
4713                 if (strlencmp(cmd, "lcd_enable") == 0) {
4714                         enable |= TP_ACPI_VIDEO_S_LCD;
4715                 } else if (strlencmp(cmd, "lcd_disable") == 0) {
4716                         disable |= TP_ACPI_VIDEO_S_LCD;
4717                 } else if (strlencmp(cmd, "crt_enable") == 0) {
4718                         enable |= TP_ACPI_VIDEO_S_CRT;
4719                 } else if (strlencmp(cmd, "crt_disable") == 0) {
4720                         disable |= TP_ACPI_VIDEO_S_CRT;
4721                 } else if (video_supported == TPACPI_VIDEO_NEW &&
4722                            strlencmp(cmd, "dvi_enable") == 0) {
4723                         enable |= TP_ACPI_VIDEO_S_DVI;
4724                 } else if (video_supported == TPACPI_VIDEO_NEW &&
4725                            strlencmp(cmd, "dvi_disable") == 0) {
4726                         disable |= TP_ACPI_VIDEO_S_DVI;
4727                 } else if (strlencmp(cmd, "auto_enable") == 0) {
4728                         res = video_autosw_set(1);
4729                         if (res)
4730                                 return res;
4731                 } else if (strlencmp(cmd, "auto_disable") == 0) {
4732                         res = video_autosw_set(0);
4733                         if (res)
4734                                 return res;
4735                 } else if (strlencmp(cmd, "video_switch") == 0) {
4736                         res = video_outputsw_cycle();
4737                         if (res)
4738                                 return res;
4739                 } else if (strlencmp(cmd, "expand_toggle") == 0) {
4740                         res = video_expand_toggle();
4741                         if (res)
4742                                 return res;
4743                 } else
4744                         return -EINVAL;
4745         }
4746
4747         if (enable || disable) {
4748                 status = video_outputsw_get();
4749                 if (status < 0)
4750                         return status;
4751                 res = video_outputsw_set((status & ~disable) | enable);
4752                 if (res)
4753                         return res;
4754         }
4755
4756         return 0;
4757 }
4758
4759 static struct ibm_struct video_driver_data = {
4760         .name = "video",
4761         .read = video_read,
4762         .write = video_write,
4763         .exit = video_exit,
4764 };
4765
4766 #endif /* CONFIG_THINKPAD_ACPI_VIDEO */
4767
4768 /*************************************************************************
4769  * Light (thinklight) subdriver
4770  */
4771
4772 TPACPI_HANDLE(lght, root, "\\LGHT");    /* A21e, A2xm/p, T20-22, X20-21 */
4773 TPACPI_HANDLE(ledb, ec, "LEDB");                /* G4x */
4774
4775 static int light_get_status(void)
4776 {
4777         int status = 0;
4778
4779         if (tp_features.light_status) {
4780                 if (!acpi_evalf(ec_handle, &status, "KBLT", "d"))
4781                         return -EIO;
4782                 return (!!status);
4783         }
4784
4785         return -ENXIO;
4786 }
4787
4788 static int light_set_status(int status)
4789 {
4790         int rc;
4791
4792         if (tp_features.light) {
4793                 if (cmos_handle) {
4794                         rc = acpi_evalf(cmos_handle, NULL, NULL, "vd",
4795                                         (status)?
4796                                                 TP_CMOS_THINKLIGHT_ON :
4797                                                 TP_CMOS_THINKLIGHT_OFF);
4798                 } else {
4799                         rc = acpi_evalf(lght_handle, NULL, NULL, "vd",
4800                                         (status)? 1 : 0);
4801                 }
4802                 return (rc)? 0 : -EIO;
4803         }
4804
4805         return -ENXIO;
4806 }
4807
4808 static void light_set_status_worker(struct work_struct *work)
4809 {
4810         struct tpacpi_led_classdev *data =
4811                         container_of(work, struct tpacpi_led_classdev, work);
4812
4813         if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING))
4814                 light_set_status((data->new_state != TPACPI_LED_OFF));
4815 }
4816
4817 static void light_sysfs_set(struct led_classdev *led_cdev,
4818                         enum led_brightness brightness)
4819 {
4820         struct tpacpi_led_classdev *data =
4821                 container_of(led_cdev,
4822                              struct tpacpi_led_classdev,
4823                              led_classdev);
4824         data->new_state = (brightness != LED_OFF) ?
4825                                 TPACPI_LED_ON : TPACPI_LED_OFF;
4826         queue_work(tpacpi_wq, &data->work);
4827 }
4828
4829 static enum led_brightness light_sysfs_get(struct led_classdev *led_cdev)
4830 {
4831         return (light_get_status() == 1)? LED_FULL : LED_OFF;
4832 }
4833
4834 static struct tpacpi_led_classdev tpacpi_led_thinklight = {
4835         .led_classdev = {
4836                 .name           = "tpacpi::thinklight",
4837                 .brightness_set = &light_sysfs_set,
4838                 .brightness_get = &light_sysfs_get,
4839         }
4840 };
4841
4842 static int __init light_init(struct ibm_init_struct *iibm)
4843 {
4844         int rc;
4845
4846         vdbg_printk(TPACPI_DBG_INIT, "initializing light subdriver\n");
4847
4848         if (tpacpi_is_ibm()) {
4849                 TPACPI_ACPIHANDLE_INIT(ledb);
4850                 TPACPI_ACPIHANDLE_INIT(lght);
4851         }
4852         TPACPI_ACPIHANDLE_INIT(cmos);
4853         INIT_WORK(&tpacpi_led_thinklight.work, light_set_status_worker);
4854
4855         /* light not supported on 570, 600e/x, 770e, 770x, G4x, R30, R31 */
4856         tp_features.light = (cmos_handle || lght_handle) && !ledb_handle;
4857
4858         if (tp_features.light)
4859                 /* light status not supported on
4860                    570, 600e/x, 770e, 770x, G4x, R30, R31, R32, X20 */
4861                 tp_features.light_status =
4862                         acpi_evalf(ec_handle, NULL, "KBLT", "qv");
4863
4864         vdbg_printk(TPACPI_DBG_INIT, "light is %s, light status is %s\n",
4865                 str_supported(tp_features.light),
4866                 str_supported(tp_features.light_status));
4867
4868         if (!tp_features.light)
4869                 return 1;
4870
4871         rc = led_classdev_register(&tpacpi_pdev->dev,
4872                                    &tpacpi_led_thinklight.led_classdev);
4873
4874         if (rc < 0) {
4875                 tp_features.light = 0;
4876                 tp_features.light_status = 0;
4877         } else  {
4878                 rc = 0;
4879         }
4880
4881         return rc;
4882 }
4883
4884 static void light_exit(void)
4885 {
4886         led_classdev_unregister(&tpacpi_led_thinklight.led_classdev);
4887         if (work_pending(&tpacpi_led_thinklight.work))
4888                 flush_workqueue(tpacpi_wq);
4889 }
4890
4891 static int light_read(struct seq_file *m)
4892 {
4893         int status;
4894
4895         if (!tp_features.light) {
4896                 seq_printf(m, "status:\t\tnot supported\n");
4897         } else if (!tp_features.light_status) {
4898                 seq_printf(m, "status:\t\tunknown\n");
4899                 seq_printf(m, "commands:\ton, off\n");
4900         } else {
4901                 status = light_get_status();
4902                 if (status < 0)
4903                         return status;
4904                 seq_printf(m, "status:\t\t%s\n", onoff(status, 0));
4905                 seq_printf(m, "commands:\ton, off\n");
4906         }
4907
4908         return 0;
4909 }
4910
4911 static int light_write(char *buf)
4912 {
4913         char *cmd;
4914         int newstatus = 0;
4915
4916         if (!tp_features.light)
4917                 return -ENODEV;
4918
4919         while ((cmd = next_cmd(&buf))) {
4920                 if (strlencmp(cmd, "on") == 0) {
4921                         newstatus = 1;
4922                 } else if (strlencmp(cmd, "off") == 0) {
4923                         newstatus = 0;
4924                 } else
4925                         return -EINVAL;
4926         }
4927
4928         return light_set_status(newstatus);
4929 }
4930
4931 static struct ibm_struct light_driver_data = {
4932         .name = "light",
4933         .read = light_read,
4934         .write = light_write,
4935         .exit = light_exit,
4936 };
4937
4938 /*************************************************************************
4939  * CMOS subdriver
4940  */
4941
4942 /* sysfs cmos_command -------------------------------------------------- */
4943 static ssize_t cmos_command_store(struct device *dev,
4944                             struct device_attribute *attr,
4945                             const char *buf, size_t count)
4946 {
4947         unsigned long cmos_cmd;
4948         int res;
4949
4950         if (parse_strtoul(buf, 21, &cmos_cmd))
4951                 return -EINVAL;
4952
4953         res = issue_thinkpad_cmos_command(cmos_cmd);
4954         return (res)? res : count;
4955 }
4956
4957 static struct device_attribute dev_attr_cmos_command =
4958         __ATTR(cmos_command, S_IWUSR, NULL, cmos_command_store);
4959
4960 /* --------------------------------------------------------------------- */
4961
4962 static int __init cmos_init(struct ibm_init_struct *iibm)
4963 {
4964         int res;
4965
4966         vdbg_printk(TPACPI_DBG_INIT,
4967                 "initializing cmos commands subdriver\n");
4968
4969         TPACPI_ACPIHANDLE_INIT(cmos);
4970
4971         vdbg_printk(TPACPI_DBG_INIT, "cmos commands are %s\n",
4972                 str_supported(cmos_handle != NULL));
4973
4974         res = device_create_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
4975         if (res)
4976                 return res;
4977
4978         return (cmos_handle)? 0 : 1;
4979 }
4980
4981 static void cmos_exit(void)
4982 {
4983         device_remove_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
4984 }
4985
4986 static int cmos_read(struct seq_file *m)
4987 {
4988         /* cmos not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
4989            R30, R31, T20-22, X20-21 */
4990         if (!cmos_handle)
4991                 seq_printf(m, "status:\t\tnot supported\n");
4992         else {
4993                 seq_printf(m, "status:\t\tsupported\n");
4994                 seq_printf(m, "commands:\t<cmd> (<cmd> is 0-21)\n");
4995         }
4996
4997         return 0;
4998 }
4999
5000 static int cmos_write(char *buf)
5001 {
5002         char *cmd;
5003         int cmos_cmd, res;
5004
5005         while ((cmd = next_cmd(&buf))) {
5006                 if (sscanf(cmd, "%u", &cmos_cmd) == 1 &&
5007                     cmos_cmd >= 0 && cmos_cmd <= 21) {
5008                         /* cmos_cmd set */
5009                 } else
5010                         return -EINVAL;
5011
5012                 res = issue_thinkpad_cmos_command(cmos_cmd);
5013                 if (res)
5014                         return res;
5015         }
5016
5017         return 0;
5018 }
5019
5020 static struct ibm_struct cmos_driver_data = {
5021         .name = "cmos",
5022         .read = cmos_read,
5023         .write = cmos_write,
5024         .exit = cmos_exit,
5025 };
5026
5027 /*************************************************************************
5028  * LED subdriver
5029  */
5030
5031 enum led_access_mode {
5032         TPACPI_LED_NONE = 0,
5033         TPACPI_LED_570, /* 570 */
5034         TPACPI_LED_OLD, /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
5035         TPACPI_LED_NEW, /* all others */
5036 };
5037
5038 enum {  /* For TPACPI_LED_OLD */
5039         TPACPI_LED_EC_HLCL = 0x0c,      /* EC reg to get led to power on */
5040         TPACPI_LED_EC_HLBL = 0x0d,      /* EC reg to blink a lit led */
5041         TPACPI_LED_EC_HLMS = 0x0e,      /* EC reg to select led to command */
5042 };
5043
5044 static enum led_access_mode led_supported;
5045
5046 static acpi_handle led_handle;
5047
5048 #define TPACPI_LED_NUMLEDS 16
5049 static struct tpacpi_led_classdev *tpacpi_leds;
5050 static enum led_status_t tpacpi_led_state_cache[TPACPI_LED_NUMLEDS];
5051 static const char * const tpacpi_led_names[TPACPI_LED_NUMLEDS] = {
5052         /* there's a limit of 19 chars + NULL before 2.6.26 */
5053         "tpacpi::power",
5054         "tpacpi:orange:batt",
5055         "tpacpi:green:batt",
5056         "tpacpi::dock_active",
5057         "tpacpi::bay_active",
5058         "tpacpi::dock_batt",
5059         "tpacpi::unknown_led",
5060         "tpacpi::standby",
5061         "tpacpi::dock_status1",
5062         "tpacpi::dock_status2",
5063         "tpacpi::unknown_led2",
5064         "tpacpi::unknown_led3",
5065         "tpacpi::thinkvantage",
5066 };
5067 #define TPACPI_SAFE_LEDS        0x1081U
5068
5069 static inline bool tpacpi_is_led_restricted(const unsigned int led)
5070 {
5071 #ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS
5072         return false;
5073 #else
5074         return (1U & (TPACPI_SAFE_LEDS >> led)) == 0;
5075 #endif
5076 }
5077
5078 static int led_get_status(const unsigned int led)
5079 {
5080         int status;
5081         enum led_status_t led_s;
5082
5083         switch (led_supported) {
5084         case TPACPI_LED_570:
5085                 if (!acpi_evalf(ec_handle,
5086                                 &status, "GLED", "dd", 1 << led))
5087                         return -EIO;
5088                 led_s = (status == 0)?
5089                                 TPACPI_LED_OFF :
5090                                 ((status == 1)?
5091                                         TPACPI_LED_ON :
5092                                         TPACPI_LED_BLINK);
5093                 tpacpi_led_state_cache[led] = led_s;
5094                 return led_s;
5095         default:
5096                 return -ENXIO;
5097         }
5098
5099         /* not reached */
5100 }
5101
5102 static int led_set_status(const unsigned int led,
5103                           const enum led_status_t ledstatus)
5104 {
5105         /* off, on, blink. Index is led_status_t */
5106         static const unsigned int led_sled_arg1[] = { 0, 1, 3 };
5107         static const unsigned int led_led_arg1[] = { 0, 0x80, 0xc0 };
5108
5109         int rc = 0;
5110
5111         switch (led_supported) {
5112         case TPACPI_LED_570:
5113                 /* 570 */
5114                 if (unlikely(led > 7))
5115                         return -EINVAL;
5116                 if (unlikely(tpacpi_is_led_restricted(led)))
5117                         return -EPERM;
5118                 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
5119                                 (1 << led), led_sled_arg1[ledstatus]))
5120                         rc = -EIO;
5121                 break;
5122         case TPACPI_LED_OLD:
5123                 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */
5124                 if (unlikely(led > 7))
5125                         return -EINVAL;
5126                 if (unlikely(tpacpi_is_led_restricted(led)))
5127                         return -EPERM;
5128                 rc = ec_write(TPACPI_LED_EC_HLMS, (1 << led));
5129                 if (rc >= 0)
5130                         rc = ec_write(TPACPI_LED_EC_HLBL,
5131                                       (ledstatus == TPACPI_LED_BLINK) << led);
5132                 if (rc >= 0)
5133                         rc = ec_write(TPACPI_LED_EC_HLCL,
5134                                       (ledstatus != TPACPI_LED_OFF) << led);
5135                 break;
5136         case TPACPI_LED_NEW:
5137                 /* all others */
5138                 if (unlikely(led >= TPACPI_LED_NUMLEDS))
5139                         return -EINVAL;
5140                 if (unlikely(tpacpi_is_led_restricted(led)))
5141                         return -EPERM;
5142                 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
5143                                 led, led_led_arg1[ledstatus]))
5144                         rc = -EIO;
5145                 break;
5146         default:
5147                 rc = -ENXIO;
5148         }
5149
5150         if (!rc)
5151                 tpacpi_led_state_cache[led] = ledstatus;
5152
5153         return rc;
5154 }
5155
5156 static void led_set_status_worker(struct work_struct *work)
5157 {
5158         struct tpacpi_led_classdev *data =
5159                 container_of(work, struct tpacpi_led_classdev, work);
5160
5161         if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING))
5162                 led_set_status(data->led, data->new_state);
5163 }
5164
5165 static void led_sysfs_set(struct led_classdev *led_cdev,
5166                         enum led_brightness brightness)
5167 {
5168         struct tpacpi_led_classdev *data = container_of(led_cdev,
5169                              struct tpacpi_led_classdev, led_classdev);
5170
5171         if (brightness == LED_OFF)
5172                 data->new_state = TPACPI_LED_OFF;
5173         else if (tpacpi_led_state_cache[data->led] != TPACPI_LED_BLINK)
5174                 data->new_state = TPACPI_LED_ON;
5175         else
5176                 data->new_state = TPACPI_LED_BLINK;
5177
5178         queue_work(tpacpi_wq, &data->work);
5179 }
5180
5181 static int led_sysfs_blink_set(struct led_classdev *led_cdev,
5182                         unsigned long *delay_on, unsigned long *delay_off)
5183 {
5184         struct tpacpi_led_classdev *data = container_of(led_cdev,
5185                              struct tpacpi_led_classdev, led_classdev);
5186
5187         /* Can we choose the flash rate? */
5188         if (*delay_on == 0 && *delay_off == 0) {
5189                 /* yes. set them to the hardware blink rate (1 Hz) */
5190                 *delay_on = 500; /* ms */
5191                 *delay_off = 500; /* ms */
5192         } else if ((*delay_on != 500) || (*delay_off != 500))
5193                 return -EINVAL;
5194
5195         data->new_state = TPACPI_LED_BLINK;
5196         queue_work(tpacpi_wq, &data->work);
5197
5198         return 0;
5199 }
5200
5201 static enum led_brightness led_sysfs_get(struct led_classdev *led_cdev)
5202 {
5203         int rc;
5204
5205         struct tpacpi_led_classdev *data = container_of(led_cdev,
5206                              struct tpacpi_led_classdev, led_classdev);
5207
5208         rc = led_get_status(data->led);
5209
5210         if (rc == TPACPI_LED_OFF || rc < 0)
5211                 rc = LED_OFF;   /* no error handling in led class :( */
5212         else
5213                 rc = LED_FULL;
5214
5215         return rc;
5216 }
5217
5218 static void led_exit(void)
5219 {
5220         unsigned int i;
5221
5222         for (i = 0; i < TPACPI_LED_NUMLEDS; i++) {
5223                 if (tpacpi_leds[i].led_classdev.name)
5224                         led_classdev_unregister(&tpacpi_leds[i].led_classdev);
5225         }
5226
5227         kfree(tpacpi_leds);
5228 }
5229
5230 static int __init tpacpi_init_led(unsigned int led)
5231 {
5232         int rc;
5233
5234         tpacpi_leds[led].led = led;
5235
5236         /* LEDs with no name don't get registered */
5237         if (!tpacpi_led_names[led])
5238                 return 0;
5239
5240         tpacpi_leds[led].led_classdev.brightness_set = &led_sysfs_set;
5241         tpacpi_leds[led].led_classdev.blink_set = &led_sysfs_blink_set;
5242         if (led_supported == TPACPI_LED_570)
5243                 tpacpi_leds[led].led_classdev.brightness_get =
5244                                                 &led_sysfs_get;
5245
5246         tpacpi_leds[led].led_classdev.name = tpacpi_led_names[led];
5247
5248         INIT_WORK(&tpacpi_leds[led].work, led_set_status_worker);
5249
5250         rc = led_classdev_register(&tpacpi_pdev->dev,
5251                                 &tpacpi_leds[led].led_classdev);
5252         if (rc < 0)
5253                 tpacpi_leds[led].led_classdev.name = NULL;
5254
5255         return rc;
5256 }
5257
5258 static const struct tpacpi_quirk led_useful_qtable[] __initconst = {
5259         TPACPI_Q_IBM('1', 'E', 0x009f), /* A30 */
5260         TPACPI_Q_IBM('1', 'N', 0x009f), /* A31 */
5261         TPACPI_Q_IBM('1', 'G', 0x009f), /* A31 */
5262
5263         TPACPI_Q_IBM('1', 'I', 0x0097), /* T30 */
5264         TPACPI_Q_IBM('1', 'R', 0x0097), /* T40, T41, T42, R50, R51 */
5265         TPACPI_Q_IBM('7', '0', 0x0097), /* T43, R52 */
5266         TPACPI_Q_IBM('1', 'Y', 0x0097), /* T43 */
5267         TPACPI_Q_IBM('1', 'W', 0x0097), /* R50e */
5268         TPACPI_Q_IBM('1', 'V', 0x0097), /* R51 */
5269         TPACPI_Q_IBM('7', '8', 0x0097), /* R51e */
5270         TPACPI_Q_IBM('7', '6', 0x0097), /* R52 */
5271
5272         TPACPI_Q_IBM('1', 'K', 0x00bf), /* X30 */
5273         TPACPI_Q_IBM('1', 'Q', 0x00bf), /* X31, X32 */
5274         TPACPI_Q_IBM('1', 'U', 0x00bf), /* X40 */
5275         TPACPI_Q_IBM('7', '4', 0x00bf), /* X41 */
5276         TPACPI_Q_IBM('7', '5', 0x00bf), /* X41t */
5277
5278         TPACPI_Q_IBM('7', '9', 0x1f97), /* T60 (1) */
5279         TPACPI_Q_IBM('7', '7', 0x1f97), /* Z60* (1) */
5280         TPACPI_Q_IBM('7', 'F', 0x1f97), /* Z61* (1) */
5281         TPACPI_Q_IBM('7', 'B', 0x1fb7), /* X60 (1) */
5282
5283         /* (1) - may have excess leds enabled on MSB */
5284
5285         /* Defaults (order matters, keep last, don't reorder!) */
5286         { /* Lenovo */
5287           .vendor = PCI_VENDOR_ID_LENOVO,
5288           .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY,
5289           .quirks = 0x1fffU,
5290         },
5291         { /* IBM ThinkPads with no EC version string */
5292           .vendor = PCI_VENDOR_ID_IBM,
5293           .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_UNKNOWN,
5294           .quirks = 0x00ffU,
5295         },
5296         { /* IBM ThinkPads with EC version string */
5297           .vendor = PCI_VENDOR_ID_IBM,
5298           .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY,
5299           .quirks = 0x00bfU,
5300         },
5301 };
5302
5303 #undef TPACPI_LEDQ_IBM
5304 #undef TPACPI_LEDQ_LNV
5305
5306 static enum led_access_mode __init led_init_detect_mode(void)
5307 {
5308         acpi_status status;
5309
5310         if (tpacpi_is_ibm()) {
5311                 /* 570 */
5312                 status = acpi_get_handle(ec_handle, "SLED", &led_handle);
5313                 if (ACPI_SUCCESS(status))
5314                         return TPACPI_LED_570;
5315
5316                 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
5317                 status = acpi_get_handle(ec_handle, "SYSL", &led_handle);
5318                 if (ACPI_SUCCESS(status))
5319                         return TPACPI_LED_OLD;
5320         }
5321
5322         /* most others */
5323         status = acpi_get_handle(ec_handle, "LED", &led_handle);
5324         if (ACPI_SUCCESS(status))
5325                 return TPACPI_LED_NEW;
5326
5327         /* R30, R31, and unknown firmwares */
5328         led_handle = NULL;
5329         return TPACPI_LED_NONE;
5330 }
5331
5332 static int __init led_init(struct ibm_init_struct *iibm)
5333 {
5334         unsigned int i;
5335         int rc;
5336         unsigned long useful_leds;
5337
5338         vdbg_printk(TPACPI_DBG_INIT, "initializing LED subdriver\n");
5339
5340         led_supported = led_init_detect_mode();
5341
5342         vdbg_printk(TPACPI_DBG_INIT, "LED commands are %s, mode %d\n",
5343                 str_supported(led_supported), led_supported);
5344
5345         if (led_supported == TPACPI_LED_NONE)
5346                 return 1;
5347
5348         tpacpi_leds = kzalloc(sizeof(*tpacpi_leds) * TPACPI_LED_NUMLEDS,
5349                               GFP_KERNEL);
5350         if (!tpacpi_leds) {
5351                 printk(TPACPI_ERR "Out of memory for LED data\n");
5352                 return -ENOMEM;
5353         }
5354
5355         useful_leds = tpacpi_check_quirks(led_useful_qtable,
5356                                           ARRAY_SIZE(led_useful_qtable));
5357
5358         for (i = 0; i < TPACPI_LED_NUMLEDS; i++) {
5359                 if (!tpacpi_is_led_restricted(i) &&
5360                     test_bit(i, &useful_leds)) {
5361                         rc = tpacpi_init_led(i);
5362                         if (rc < 0) {
5363                                 led_exit();
5364                                 return rc;
5365                         }
5366                 }
5367         }
5368
5369 #ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS
5370         printk(TPACPI_NOTICE
5371                 "warning: userspace override of important "
5372                 "firmware LEDs is enabled\n");
5373 #endif
5374         return 0;
5375 }
5376
5377 #define str_led_status(s) \
5378         ((s) == TPACPI_LED_OFF ? "off" : \
5379                 ((s) == TPACPI_LED_ON ? "on" : "blinking"))
5380
5381 static int led_read(struct seq_file *m)
5382 {
5383         if (!led_supported) {
5384                 seq_printf(m, "status:\t\tnot supported\n");
5385                 return 0;
5386         }
5387         seq_printf(m, "status:\t\tsupported\n");
5388
5389         if (led_supported == TPACPI_LED_570) {
5390                 /* 570 */
5391                 int i, status;
5392                 for (i = 0; i < 8; i++) {
5393                         status = led_get_status(i);
5394                         if (status < 0)
5395                                 return -EIO;
5396                         seq_printf(m, "%d:\t\t%s\n",
5397                                        i, str_led_status(status));
5398                 }
5399         }
5400
5401         seq_printf(m, "commands:\t"
5402                        "<led> on, <led> off, <led> blink (<led> is 0-15)\n");
5403
5404         return 0;
5405 }
5406
5407 static int led_write(char *buf)
5408 {
5409         char *cmd;
5410         int led, rc;
5411         enum led_status_t s;
5412
5413         if (!led_supported)
5414                 return -ENODEV;
5415
5416         while ((cmd = next_cmd(&buf))) {
5417                 if (sscanf(cmd, "%d", &led) != 1 || led < 0 || led > 15)
5418                         return -EINVAL;
5419
5420                 if (strstr(cmd, "off")) {
5421                         s = TPACPI_LED_OFF;
5422                 } else if (strstr(cmd, "on")) {
5423                         s = TPACPI_LED_ON;
5424                 } else if (strstr(cmd, "blink")) {
5425                         s = TPACPI_LED_BLINK;
5426                 } else {
5427                         return -EINVAL;
5428                 }
5429
5430                 rc = led_set_status(led, s);
5431                 if (rc < 0)
5432                         return rc;
5433         }
5434
5435         return 0;
5436 }
5437
5438 static struct ibm_struct led_driver_data = {
5439         .name = "led",
5440         .read = led_read,
5441         .write = led_write,
5442         .exit = led_exit,
5443 };
5444
5445 /*************************************************************************
5446  * Beep subdriver
5447  */
5448
5449 TPACPI_HANDLE(beep, ec, "BEEP");        /* all except R30, R31 */
5450
5451 #define TPACPI_BEEP_Q1 0x0001
5452
5453 static const struct tpacpi_quirk beep_quirk_table[] __initconst = {
5454         TPACPI_Q_IBM('I', 'M', TPACPI_BEEP_Q1), /* 570 */
5455         TPACPI_Q_IBM('I', 'U', TPACPI_BEEP_Q1), /* 570E - unverified */
5456 };
5457
5458 static int __init beep_init(struct ibm_init_struct *iibm)
5459 {
5460         unsigned long quirks;
5461
5462         vdbg_printk(TPACPI_DBG_INIT, "initializing beep subdriver\n");
5463
5464         TPACPI_ACPIHANDLE_INIT(beep);
5465
5466         vdbg_printk(TPACPI_DBG_INIT, "beep is %s\n",
5467                 str_supported(beep_handle != NULL));
5468
5469         quirks = tpacpi_check_quirks(beep_quirk_table,
5470                                      ARRAY_SIZE(beep_quirk_table));
5471
5472         tp_features.beep_needs_two_args = !!(quirks & TPACPI_BEEP_Q1);
5473
5474         return (beep_handle)? 0 : 1;
5475 }
5476
5477 static int beep_read(struct seq_file *m)
5478 {
5479         if (!beep_handle)
5480                 seq_printf(m, "status:\t\tnot supported\n");
5481         else {
5482                 seq_printf(m, "status:\t\tsupported\n");
5483                 seq_printf(m, "commands:\t<cmd> (<cmd> is 0-17)\n");
5484         }
5485
5486         return 0;
5487 }
5488
5489 static int beep_write(char *buf)
5490 {
5491         char *cmd;
5492         int beep_cmd;
5493
5494         if (!beep_handle)
5495                 return -ENODEV;
5496
5497         while ((cmd = next_cmd(&buf))) {
5498                 if (sscanf(cmd, "%u", &beep_cmd) == 1 &&
5499                     beep_cmd >= 0 && beep_cmd <= 17) {
5500                         /* beep_cmd set */
5501                 } else
5502                         return -EINVAL;
5503                 if (tp_features.beep_needs_two_args) {
5504                         if (!acpi_evalf(beep_handle, NULL, NULL, "vdd",
5505                                         beep_cmd, 0))
5506                                 return -EIO;
5507                 } else {
5508                         if (!acpi_evalf(beep_handle, NULL, NULL, "vd",
5509                                         beep_cmd))
5510                                 return -EIO;
5511                 }
5512         }
5513
5514         return 0;
5515 }
5516
5517 static struct ibm_struct beep_driver_data = {
5518         .name = "beep",
5519         .read = beep_read,
5520         .write = beep_write,
5521 };
5522
5523 /*************************************************************************
5524  * Thermal subdriver
5525  */
5526
5527 enum thermal_access_mode {
5528         TPACPI_THERMAL_NONE = 0,        /* No thermal support */
5529         TPACPI_THERMAL_ACPI_TMP07,      /* Use ACPI TMP0-7 */
5530         TPACPI_THERMAL_ACPI_UPDT,       /* Use ACPI TMP0-7 with UPDT */
5531         TPACPI_THERMAL_TPEC_8,          /* Use ACPI EC regs, 8 sensors */
5532         TPACPI_THERMAL_TPEC_16,         /* Use ACPI EC regs, 16 sensors */
5533 };
5534
5535 enum { /* TPACPI_THERMAL_TPEC_* */
5536         TP_EC_THERMAL_TMP0 = 0x78,      /* ACPI EC regs TMP 0..7 */
5537         TP_EC_THERMAL_TMP8 = 0xC0,      /* ACPI EC regs TMP 8..15 */
5538         TP_EC_THERMAL_TMP_NA = -128,    /* ACPI EC sensor not available */
5539
5540         TPACPI_THERMAL_SENSOR_NA = -128000, /* Sensor not available */
5541 };
5542
5543
5544 #define TPACPI_MAX_THERMAL_SENSORS 16   /* Max thermal sensors supported */
5545 struct ibm_thermal_sensors_struct {
5546         s32 temp[TPACPI_MAX_THERMAL_SENSORS];
5547 };
5548
5549 static enum thermal_access_mode thermal_read_mode;
5550
5551 /* idx is zero-based */
5552 static int thermal_get_sensor(int idx, s32 *value)
5553 {
5554         int t;
5555         s8 tmp;
5556         char tmpi[5];
5557
5558         t = TP_EC_THERMAL_TMP0;
5559
5560         switch (thermal_read_mode) {
5561 #if TPACPI_MAX_THERMAL_SENSORS >= 16
5562         case TPACPI_THERMAL_TPEC_16:
5563                 if (idx >= 8 && idx <= 15) {
5564                         t = TP_EC_THERMAL_TMP8;
5565                         idx -= 8;
5566                 }
5567                 /* fallthrough */
5568 #endif
5569         case TPACPI_THERMAL_TPEC_8:
5570                 if (idx <= 7) {
5571                         if (!acpi_ec_read(t + idx, &tmp))
5572                                 return -EIO;
5573                         *value = tmp * 1000;
5574                         return 0;
5575                 }
5576                 break;
5577
5578         case TPACPI_THERMAL_ACPI_UPDT:
5579                 if (idx <= 7) {
5580                         snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
5581                         if (!acpi_evalf(ec_handle, NULL, "UPDT", "v"))
5582                                 return -EIO;
5583                         if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
5584                                 return -EIO;
5585                         *value = (t - 2732) * 100;
5586                         return 0;
5587                 }
5588                 break;
5589
5590         case TPACPI_THERMAL_ACPI_TMP07:
5591                 if (idx <= 7) {
5592                         snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
5593                         if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
5594                                 return -EIO;
5595                         if (t > 127 || t < -127)
5596                                 t = TP_EC_THERMAL_TMP_NA;
5597                         *value = t * 1000;
5598                         return 0;
5599                 }
5600                 break;
5601
5602         case TPACPI_THERMAL_NONE:
5603         default:
5604                 return -ENOSYS;
5605         }
5606
5607         return -EINVAL;
5608 }
5609
5610 static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s)
5611 {
5612         int res, i;
5613         int n;
5614
5615         n = 8;
5616         i = 0;
5617
5618         if (!s)
5619                 return -EINVAL;
5620
5621         if (thermal_read_mode == TPACPI_THERMAL_TPEC_16)
5622                 n = 16;
5623
5624         for (i = 0 ; i < n; i++) {
5625                 res = thermal_get_sensor(i, &s->temp[i]);
5626                 if (res)
5627                         return res;
5628         }
5629
5630         return n;
5631 }
5632
5633 static void thermal_dump_all_sensors(void)
5634 {
5635         int n, i;
5636         struct ibm_thermal_sensors_struct t;
5637
5638         n = thermal_get_sensors(&t);
5639         if (n <= 0)
5640                 return;
5641
5642         printk(TPACPI_NOTICE
5643                 "temperatures (Celsius):");
5644
5645         for (i = 0; i < n; i++) {
5646                 if (t.temp[i] != TPACPI_THERMAL_SENSOR_NA)
5647                         printk(KERN_CONT " %d", (int)(t.temp[i] / 1000));
5648                 else
5649                         printk(KERN_CONT " N/A");
5650         }
5651
5652         printk(KERN_CONT "\n");
5653 }
5654
5655 /* sysfs temp##_input -------------------------------------------------- */
5656
5657 static ssize_t thermal_temp_input_show(struct device *dev,
5658                            struct device_attribute *attr,
5659                            char *buf)
5660 {
5661         struct sensor_device_attribute *sensor_attr =
5662                                         to_sensor_dev_attr(attr);
5663         int idx = sensor_attr->index;
5664         s32 value;
5665         int res;
5666
5667         res = thermal_get_sensor(idx, &value);
5668         if (res)
5669                 return res;
5670         if (value == TPACPI_THERMAL_SENSOR_NA)
5671                 return -ENXIO;
5672
5673         return snprintf(buf, PAGE_SIZE, "%d\n", value);
5674 }
5675
5676 #define THERMAL_SENSOR_ATTR_TEMP(_idxA, _idxB) \
5677          SENSOR_ATTR(temp##_idxA##_input, S_IRUGO, \
5678                      thermal_temp_input_show, NULL, _idxB)
5679
5680 static struct sensor_device_attribute sensor_dev_attr_thermal_temp_input[] = {
5681         THERMAL_SENSOR_ATTR_TEMP(1, 0),
5682         THERMAL_SENSOR_ATTR_TEMP(2, 1),
5683         THERMAL_SENSOR_ATTR_TEMP(3, 2),
5684         THERMAL_SENSOR_ATTR_TEMP(4, 3),
5685         THERMAL_SENSOR_ATTR_TEMP(5, 4),
5686         THERMAL_SENSOR_ATTR_TEMP(6, 5),
5687         THERMAL_SENSOR_ATTR_TEMP(7, 6),
5688         THERMAL_SENSOR_ATTR_TEMP(8, 7),
5689         THERMAL_SENSOR_ATTR_TEMP(9, 8),
5690         THERMAL_SENSOR_ATTR_TEMP(10, 9),
5691         THERMAL_SENSOR_ATTR_TEMP(11, 10),
5692         THERMAL_SENSOR_ATTR_TEMP(12, 11),
5693         THERMAL_SENSOR_ATTR_TEMP(13, 12),
5694         THERMAL_SENSOR_ATTR_TEMP(14, 13),
5695         THERMAL_SENSOR_ATTR_TEMP(15, 14),
5696         THERMAL_SENSOR_ATTR_TEMP(16, 15),
5697 };
5698
5699 #define THERMAL_ATTRS(X) \
5700         &sensor_dev_attr_thermal_temp_input[X].dev_attr.attr
5701
5702 static struct attribute *thermal_temp_input_attr[] = {
5703         THERMAL_ATTRS(8),
5704         THERMAL_ATTRS(9),
5705         THERMAL_ATTRS(10),
5706         THERMAL_ATTRS(11),
5707         THERMAL_ATTRS(12),
5708         THERMAL_ATTRS(13),
5709         THERMAL_ATTRS(14),
5710         THERMAL_ATTRS(15),
5711         THERMAL_ATTRS(0),
5712         THERMAL_ATTRS(1),
5713         THERMAL_ATTRS(2),
5714         THERMAL_ATTRS(3),
5715         THERMAL_ATTRS(4),
5716         THERMAL_ATTRS(5),
5717         THERMAL_ATTRS(6),
5718         THERMAL_ATTRS(7),
5719         NULL
5720 };
5721
5722 static const struct attribute_group thermal_temp_input16_group = {
5723         .attrs = thermal_temp_input_attr
5724 };
5725
5726 static const struct attribute_group thermal_temp_input8_group = {
5727         .attrs = &thermal_temp_input_attr[8]
5728 };
5729
5730 #undef THERMAL_SENSOR_ATTR_TEMP
5731 #undef THERMAL_ATTRS
5732
5733 /* --------------------------------------------------------------------- */
5734
5735 static int __init thermal_init(struct ibm_init_struct *iibm)
5736 {
5737         u8 t, ta1, ta2;
5738         int i;
5739         int acpi_tmp7;
5740         int res;
5741
5742         vdbg_printk(TPACPI_DBG_INIT, "initializing thermal subdriver\n");
5743
5744         acpi_tmp7 = acpi_evalf(ec_handle, NULL, "TMP7", "qv");
5745
5746         if (thinkpad_id.ec_model) {
5747                 /*
5748                  * Direct EC access mode: sensors at registers
5749                  * 0x78-0x7F, 0xC0-0xC7.  Registers return 0x00 for
5750                  * non-implemented, thermal sensors return 0x80 when
5751                  * not available
5752                  */
5753
5754                 ta1 = ta2 = 0;
5755                 for (i = 0; i < 8; i++) {
5756                         if (acpi_ec_read(TP_EC_THERMAL_TMP0 + i, &t)) {
5757                                 ta1 |= t;
5758                         } else {
5759                                 ta1 = 0;
5760                                 break;
5761                         }
5762                         if (acpi_ec_read(TP_EC_THERMAL_TMP8 + i, &t)) {
5763                                 ta2 |= t;
5764                         } else {
5765                                 ta1 = 0;
5766                                 break;
5767                         }
5768                 }
5769                 if (ta1 == 0) {
5770                         /* This is sheer paranoia, but we handle it anyway */
5771                         if (acpi_tmp7) {
5772                                 printk(TPACPI_ERR
5773                                        "ThinkPad ACPI EC access misbehaving, "
5774                                        "falling back to ACPI TMPx access "
5775                                        "mode\n");
5776                                 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
5777                         } else {
5778                                 printk(TPACPI_ERR
5779                                        "ThinkPad ACPI EC access misbehaving, "
5780                                        "disabling thermal sensors access\n");
5781                                 thermal_read_mode = TPACPI_THERMAL_NONE;
5782                         }
5783                 } else {
5784                         thermal_read_mode =
5785                             (ta2 != 0) ?
5786                             TPACPI_THERMAL_TPEC_16 : TPACPI_THERMAL_TPEC_8;
5787                 }
5788         } else if (acpi_tmp7) {
5789                 if (tpacpi_is_ibm() &&
5790                     acpi_evalf(ec_handle, NULL, "UPDT", "qv")) {
5791                         /* 600e/x, 770e, 770x */
5792                         thermal_read_mode = TPACPI_THERMAL_ACPI_UPDT;
5793                 } else {
5794                         /* IBM/LENOVO DSDT EC.TMPx access, max 8 sensors */
5795                         thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
5796                 }
5797         } else {
5798                 /* temperatures not supported on 570, G4x, R30, R31, R32 */
5799                 thermal_read_mode = TPACPI_THERMAL_NONE;
5800         }
5801
5802         vdbg_printk(TPACPI_DBG_INIT, "thermal is %s, mode %d\n",
5803                 str_supported(thermal_read_mode != TPACPI_THERMAL_NONE),
5804                 thermal_read_mode);
5805
5806         switch (thermal_read_mode) {
5807         case TPACPI_THERMAL_TPEC_16:
5808                 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
5809                                 &thermal_temp_input16_group);
5810                 if (res)
5811                         return res;
5812                 break;
5813         case TPACPI_THERMAL_TPEC_8:
5814         case TPACPI_THERMAL_ACPI_TMP07:
5815         case TPACPI_THERMAL_ACPI_UPDT:
5816                 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
5817                                 &thermal_temp_input8_group);
5818                 if (res)
5819                         return res;
5820                 break;
5821         case TPACPI_THERMAL_NONE:
5822         default:
5823                 return 1;
5824         }
5825
5826         return 0;
5827 }
5828
5829 static void thermal_exit(void)
5830 {
5831         switch (thermal_read_mode) {
5832         case TPACPI_THERMAL_TPEC_16:
5833                 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
5834                                    &thermal_temp_input16_group);
5835                 break;
5836         case TPACPI_THERMAL_TPEC_8:
5837         case TPACPI_THERMAL_ACPI_TMP07:
5838         case TPACPI_THERMAL_ACPI_UPDT:
5839                 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
5840                                    &thermal_temp_input8_group);
5841                 break;
5842         case TPACPI_THERMAL_NONE:
5843         default:
5844                 break;
5845         }
5846 }
5847
5848 static int thermal_read(struct seq_file *m)
5849 {
5850         int n, i;
5851         struct ibm_thermal_sensors_struct t;
5852
5853         n = thermal_get_sensors(&t);
5854         if (unlikely(n < 0))
5855                 return n;
5856
5857         seq_printf(m, "temperatures:\t");
5858
5859         if (n > 0) {
5860                 for (i = 0; i < (n - 1); i++)
5861                         seq_printf(m, "%d ", t.temp[i] / 1000);
5862                 seq_printf(m, "%d\n", t.temp[i] / 1000);
5863         } else
5864                 seq_printf(m, "not supported\n");
5865
5866         return 0;
5867 }
5868
5869 static struct ibm_struct thermal_driver_data = {
5870         .name = "thermal",
5871         .read = thermal_read,
5872         .exit = thermal_exit,
5873 };
5874
5875 /*************************************************************************
5876  * Backlight/brightness subdriver
5877  */
5878
5879 #define TPACPI_BACKLIGHT_DEV_NAME "thinkpad_screen"
5880
5881 /*
5882  * ThinkPads can read brightness from two places: EC HBRV (0x31), or
5883  * CMOS NVRAM byte 0x5E, bits 0-3.
5884  *
5885  * EC HBRV (0x31) has the following layout
5886  *   Bit 7: unknown function
5887  *   Bit 6: unknown function
5888  *   Bit 5: Z: honour scale changes, NZ: ignore scale changes
5889  *   Bit 4: must be set to zero to avoid problems
5890  *   Bit 3-0: backlight brightness level
5891  *
5892  * brightness_get_raw returns status data in the HBRV layout
5893  *
5894  * WARNING: The X61 has been verified to use HBRV for something else, so
5895  * this should be used _only_ on IBM ThinkPads, and maybe with some careful
5896  * testing on the very early *60 Lenovo models...
5897  */
5898
5899 enum {
5900         TP_EC_BACKLIGHT = 0x31,
5901
5902         /* TP_EC_BACKLIGHT bitmasks */
5903         TP_EC_BACKLIGHT_LVLMSK = 0x1F,
5904         TP_EC_BACKLIGHT_CMDMSK = 0xE0,
5905         TP_EC_BACKLIGHT_MAPSW = 0x20,
5906 };
5907
5908 enum tpacpi_brightness_access_mode {
5909         TPACPI_BRGHT_MODE_AUTO = 0,     /* Not implemented yet */
5910         TPACPI_BRGHT_MODE_EC,           /* EC control */
5911         TPACPI_BRGHT_MODE_UCMS_STEP,    /* UCMS step-based control */
5912         TPACPI_BRGHT_MODE_ECNVRAM,      /* EC control w/ NVRAM store */
5913         TPACPI_BRGHT_MODE_MAX
5914 };
5915
5916 static struct backlight_device *ibm_backlight_device;
5917
5918 static enum tpacpi_brightness_access_mode brightness_mode =
5919                 TPACPI_BRGHT_MODE_MAX;
5920
5921 static unsigned int brightness_enable = 2; /* 2 = auto, 0 = no, 1 = yes */
5922
5923 static struct mutex brightness_mutex;
5924
5925 /* NVRAM brightness access,
5926  * call with brightness_mutex held! */
5927 static unsigned int tpacpi_brightness_nvram_get(void)
5928 {
5929         u8 lnvram;
5930
5931         lnvram = (nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS)
5932                   & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
5933                   >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
5934         lnvram &= bright_maxlvl;
5935
5936         return lnvram;
5937 }
5938
5939 static void tpacpi_brightness_checkpoint_nvram(void)
5940 {
5941         u8 lec = 0;
5942         u8 b_nvram;
5943
5944         if (brightness_mode != TPACPI_BRGHT_MODE_ECNVRAM)
5945                 return;
5946
5947         vdbg_printk(TPACPI_DBG_BRGHT,
5948                 "trying to checkpoint backlight level to NVRAM...\n");
5949
5950         if (mutex_lock_killable(&brightness_mutex) < 0)
5951                 return;
5952
5953         if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
5954                 goto unlock;
5955         lec &= TP_EC_BACKLIGHT_LVLMSK;
5956         b_nvram = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS);
5957
5958         if (lec != ((b_nvram & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
5959                              >> TP_NVRAM_POS_LEVEL_BRIGHTNESS)) {
5960                 /* NVRAM needs update */
5961                 b_nvram &= ~(TP_NVRAM_MASK_LEVEL_BRIGHTNESS <<
5962                                 TP_NVRAM_POS_LEVEL_BRIGHTNESS);
5963                 b_nvram |= lec;
5964                 nvram_write_byte(b_nvram, TP_NVRAM_ADDR_BRIGHTNESS);
5965                 dbg_printk(TPACPI_DBG_BRGHT,
5966                            "updated NVRAM backlight level to %u (0x%02x)\n",
5967                            (unsigned int) lec, (unsigned int) b_nvram);
5968         } else
5969                 vdbg_printk(TPACPI_DBG_BRGHT,
5970                            "NVRAM backlight level already is %u (0x%02x)\n",
5971                            (unsigned int) lec, (unsigned int) b_nvram);
5972
5973 unlock:
5974         mutex_unlock(&brightness_mutex);
5975 }
5976
5977
5978 /* call with brightness_mutex held! */
5979 static int tpacpi_brightness_get_raw(int *status)
5980 {
5981         u8 lec = 0;
5982
5983         switch (brightness_mode) {
5984         case TPACPI_BRGHT_MODE_UCMS_STEP:
5985                 *status = tpacpi_brightness_nvram_get();
5986                 return 0;
5987         case TPACPI_BRGHT_MODE_EC:
5988         case TPACPI_BRGHT_MODE_ECNVRAM:
5989                 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
5990                         return -EIO;
5991                 *status = lec;
5992                 return 0;
5993         default:
5994                 return -ENXIO;
5995         }
5996 }
5997
5998 /* call with brightness_mutex held! */
5999 /* do NOT call with illegal backlight level value */
6000 static int tpacpi_brightness_set_ec(unsigned int value)
6001 {
6002         u8 lec = 0;
6003
6004         if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
6005                 return -EIO;
6006
6007         if (unlikely(!acpi_ec_write(TP_EC_BACKLIGHT,
6008                                 (lec & TP_EC_BACKLIGHT_CMDMSK) |
6009                                 (value & TP_EC_BACKLIGHT_LVLMSK))))
6010                 return -EIO;
6011
6012         return 0;
6013 }
6014
6015 /* call with brightness_mutex held! */
6016 static int tpacpi_brightness_set_ucmsstep(unsigned int value)
6017 {
6018         int cmos_cmd, inc;
6019         unsigned int current_value, i;
6020
6021         current_value = tpacpi_brightness_nvram_get();
6022
6023         if (value == current_value)
6024                 return 0;
6025
6026         cmos_cmd = (value > current_value) ?
6027                         TP_CMOS_BRIGHTNESS_UP :
6028                         TP_CMOS_BRIGHTNESS_DOWN;
6029         inc = (value > current_value) ? 1 : -1;
6030
6031         for (i = current_value; i != value; i += inc)
6032                 if (issue_thinkpad_cmos_command(cmos_cmd))
6033                         return -EIO;
6034
6035         return 0;
6036 }
6037
6038 /* May return EINTR which can always be mapped to ERESTARTSYS */
6039 static int brightness_set(unsigned int value)
6040 {
6041         int res;
6042
6043         if (value > bright_maxlvl || value < 0)
6044                 return -EINVAL;
6045
6046         vdbg_printk(TPACPI_DBG_BRGHT,
6047                         "set backlight level to %d\n", value);
6048
6049         res = mutex_lock_killable(&brightness_mutex);
6050         if (res < 0)
6051                 return res;
6052
6053         switch (brightness_mode) {
6054         case TPACPI_BRGHT_MODE_EC:
6055         case TPACPI_BRGHT_MODE_ECNVRAM:
6056                 res = tpacpi_brightness_set_ec(value);
6057                 break;
6058         case TPACPI_BRGHT_MODE_UCMS_STEP:
6059                 res = tpacpi_brightness_set_ucmsstep(value);
6060                 break;
6061         default:
6062                 res = -ENXIO;
6063         }
6064
6065         mutex_unlock(&brightness_mutex);
6066         return res;
6067 }
6068
6069 /* sysfs backlight class ----------------------------------------------- */
6070
6071 static int brightness_update_status(struct backlight_device *bd)
6072 {
6073         unsigned int level =
6074                 (bd->props.fb_blank == FB_BLANK_UNBLANK &&
6075                  bd->props.power == FB_BLANK_UNBLANK) ?
6076                                 bd->props.brightness : 0;
6077
6078         dbg_printk(TPACPI_DBG_BRGHT,
6079                         "backlight: attempt to set level to %d\n",
6080                         level);
6081
6082         /* it is the backlight class's job (caller) to handle
6083          * EINTR and other errors properly */
6084         return brightness_set(level);
6085 }
6086
6087 static int brightness_get(struct backlight_device *bd)
6088 {
6089         int status, res;
6090
6091         res = mutex_lock_killable(&brightness_mutex);
6092         if (res < 0)
6093                 return 0;
6094
6095         res = tpacpi_brightness_get_raw(&status);
6096
6097         mutex_unlock(&brightness_mutex);
6098
6099         if (res < 0)
6100                 return 0;
6101
6102         return status & TP_EC_BACKLIGHT_LVLMSK;
6103 }
6104
6105 static void tpacpi_brightness_notify_change(void)
6106 {
6107         backlight_force_update(ibm_backlight_device,
6108                                BACKLIGHT_UPDATE_HOTKEY);
6109 }
6110
6111 static const struct backlight_ops ibm_backlight_data = {
6112         .get_brightness = brightness_get,
6113         .update_status  = brightness_update_status,
6114 };
6115
6116 /* --------------------------------------------------------------------- */
6117
6118 /*
6119  * Call _BCL method of video device.  On some ThinkPads this will
6120  * switch the firmware to the ACPI brightness control mode.
6121  */
6122
6123 static int __init tpacpi_query_bcl_levels(acpi_handle handle)
6124 {
6125         struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
6126         union acpi_object *obj;
6127         int rc;
6128
6129         if (ACPI_SUCCESS(acpi_evaluate_object(handle, "_BCL", NULL, &buffer))) {
6130                 obj = (union acpi_object *)buffer.pointer;
6131                 if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) {
6132                         printk(TPACPI_ERR "Unknown _BCL data, "
6133                                "please report this to %s\n", TPACPI_MAIL);
6134                         rc = 0;
6135                 } else {
6136                         rc = obj->package.count;
6137                 }
6138         } else {
6139                 return 0;
6140         }
6141
6142         kfree(buffer.pointer);
6143         return rc;
6144 }
6145
6146
6147 /*
6148  * Returns 0 (no ACPI _BCL or _BCL invalid), or size of brightness map
6149  */
6150 static unsigned int __init tpacpi_check_std_acpi_brightness_support(void)
6151 {
6152         acpi_handle video_device;
6153         int bcl_levels = 0;
6154
6155         tpacpi_acpi_handle_locate("video", ACPI_VIDEO_HID, &video_device);
6156         if (video_device)
6157                 bcl_levels = tpacpi_query_bcl_levels(video_device);
6158
6159         tp_features.bright_acpimode = (bcl_levels > 0);
6160
6161         return (bcl_levels > 2) ? (bcl_levels - 2) : 0;
6162 }
6163
6164 /*
6165  * These are only useful for models that have only one possibility
6166  * of GPU.  If the BIOS model handles both ATI and Intel, don't use
6167  * these quirks.
6168  */
6169 #define TPACPI_BRGHT_Q_NOEC     0x0001  /* Must NOT use EC HBRV */
6170 #define TPACPI_BRGHT_Q_EC       0x0002  /* Should or must use EC HBRV */
6171 #define TPACPI_BRGHT_Q_ASK      0x8000  /* Ask for user report */
6172
6173 static const struct tpacpi_quirk brightness_quirk_table[] __initconst = {
6174         /* Models with ATI GPUs known to require ECNVRAM mode */
6175         TPACPI_Q_IBM('1', 'Y', TPACPI_BRGHT_Q_EC),      /* T43/p ATI */
6176
6177         /* Models with ATI GPUs that can use ECNVRAM */
6178         TPACPI_Q_IBM('1', 'R', TPACPI_BRGHT_Q_EC),      /* R50,51 T40-42 */
6179         TPACPI_Q_IBM('1', 'Q', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
6180         TPACPI_Q_IBM('7', '6', TPACPI_BRGHT_Q_EC),      /* R52 */
6181         TPACPI_Q_IBM('7', '8', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
6182
6183         /* Models with Intel Extreme Graphics 2 */
6184         TPACPI_Q_IBM('1', 'U', TPACPI_BRGHT_Q_NOEC),    /* X40 */
6185         TPACPI_Q_IBM('1', 'V', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
6186         TPACPI_Q_IBM('1', 'W', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
6187
6188         /* Models with Intel GMA900 */
6189         TPACPI_Q_IBM('7', '0', TPACPI_BRGHT_Q_NOEC),    /* T43, R52 */
6190         TPACPI_Q_IBM('7', '4', TPACPI_BRGHT_Q_NOEC),    /* X41 */
6191         TPACPI_Q_IBM('7', '5', TPACPI_BRGHT_Q_NOEC),    /* X41 Tablet */
6192 };
6193
6194 /*
6195  * Returns < 0 for error, otherwise sets tp_features.bright_*
6196  * and bright_maxlvl.
6197  */
6198 static void __init tpacpi_detect_brightness_capabilities(void)
6199 {
6200         unsigned int b;
6201
6202         vdbg_printk(TPACPI_DBG_INIT,
6203                     "detecting firmware brightness interface capabilities\n");
6204
6205         /* we could run a quirks check here (same table used by
6206          * brightness_init) if needed */
6207
6208         /*
6209          * We always attempt to detect acpi support, so as to switch
6210          * Lenovo Vista BIOS to ACPI brightness mode even if we are not
6211          * going to publish a backlight interface
6212          */
6213         b = tpacpi_check_std_acpi_brightness_support();
6214         switch (b) {
6215         case 16:
6216                 bright_maxlvl = 15;
6217                 printk(TPACPI_INFO
6218                        "detected a 16-level brightness capable ThinkPad\n");
6219                 break;
6220         case 8:
6221         case 0:
6222                 bright_maxlvl = 7;
6223                 printk(TPACPI_INFO
6224                        "detected a 8-level brightness capable ThinkPad\n");
6225                 break;
6226         default:
6227                 printk(TPACPI_ERR
6228                        "Unsupported brightness interface, "
6229                        "please contact %s\n", TPACPI_MAIL);
6230                 tp_features.bright_unkfw = 1;
6231                 bright_maxlvl = b - 1;
6232         }
6233 }
6234
6235 static int __init brightness_init(struct ibm_init_struct *iibm)
6236 {
6237         struct backlight_properties props;
6238         int b;
6239         unsigned long quirks;
6240
6241         vdbg_printk(TPACPI_DBG_INIT, "initializing brightness subdriver\n");
6242
6243         mutex_init(&brightness_mutex);
6244
6245         quirks = tpacpi_check_quirks(brightness_quirk_table,
6246                                 ARRAY_SIZE(brightness_quirk_table));
6247
6248         /* tpacpi_detect_brightness_capabilities() must have run already */
6249
6250         /* if it is unknown, we don't handle it: it wouldn't be safe */
6251         if (tp_features.bright_unkfw)
6252                 return 1;
6253
6254         if (!brightness_enable) {
6255                 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT,
6256                            "brightness support disabled by "
6257                            "module parameter\n");
6258                 return 1;
6259         }
6260
6261         if (acpi_video_backlight_support()) {
6262                 if (brightness_enable > 1) {
6263                         printk(TPACPI_INFO
6264                                "Standard ACPI backlight interface "
6265                                "available, not loading native one.\n");
6266                         return 1;
6267                 } else if (brightness_enable == 1) {
6268                         printk(TPACPI_WARN
6269                                 "Cannot enable backlight brightness support, "
6270                                 "ACPI is already handling it.  Refer to the "
6271                                 "acpi_backlight kernel parameter\n");
6272                         return 1;
6273                 }
6274         } else if (tp_features.bright_acpimode && brightness_enable > 1) {
6275                 printk(TPACPI_NOTICE
6276                         "Standard ACPI backlight interface not "
6277                         "available, thinkpad_acpi native "
6278                         "brightness control enabled\n");
6279         }
6280
6281         /*
6282          * Check for module parameter bogosity, note that we
6283          * init brightness_mode to TPACPI_BRGHT_MODE_MAX in order to be
6284          * able to detect "unspecified"
6285          */
6286         if (brightness_mode > TPACPI_BRGHT_MODE_MAX)
6287                 return -EINVAL;
6288
6289         /* TPACPI_BRGHT_MODE_AUTO not implemented yet, just use default */
6290         if (brightness_mode == TPACPI_BRGHT_MODE_AUTO ||
6291             brightness_mode == TPACPI_BRGHT_MODE_MAX) {
6292                 if (quirks & TPACPI_BRGHT_Q_EC)
6293                         brightness_mode = TPACPI_BRGHT_MODE_ECNVRAM;
6294                 else
6295                         brightness_mode = TPACPI_BRGHT_MODE_UCMS_STEP;
6296
6297                 dbg_printk(TPACPI_DBG_BRGHT,
6298                            "driver auto-selected brightness_mode=%d\n",
6299              &n