thinkpad-acpi: bump version to 0.24
[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
62 #include <linux/nvram.h>
63 #include <linux/proc_fs.h>
64 #include <linux/seq_file.h>
65 #include <linux/sysfs.h>
66 #include <linux/backlight.h>
67 #include <linux/fb.h>
68 #include <linux/platform_device.h>
69 #include <linux/hwmon.h>
70 #include <linux/hwmon-sysfs.h>
71 #include <linux/input.h>
72 #include <linux/leds.h>
73 #include <linux/rfkill.h>
74 #include <asm/uaccess.h>
75
76 #include <linux/dmi.h>
77 #include <linux/jiffies.h>
78 #include <linux/workqueue.h>
79
80 #include <sound/core.h>
81 #include <sound/control.h>
82 #include <sound/initval.h>
83
84 #include <acpi/acpi_drivers.h>
85
86 #include <linux/pci_ids.h>
87
88
89 /* ThinkPad CMOS commands */
90 #define TP_CMOS_VOLUME_DOWN     0
91 #define TP_CMOS_VOLUME_UP       1
92 #define TP_CMOS_VOLUME_MUTE     2
93 #define TP_CMOS_BRIGHTNESS_UP   4
94 #define TP_CMOS_BRIGHTNESS_DOWN 5
95 #define TP_CMOS_THINKLIGHT_ON   12
96 #define TP_CMOS_THINKLIGHT_OFF  13
97
98 /* NVRAM Addresses */
99 enum tp_nvram_addr {
100         TP_NVRAM_ADDR_HK2               = 0x57,
101         TP_NVRAM_ADDR_THINKLIGHT        = 0x58,
102         TP_NVRAM_ADDR_VIDEO             = 0x59,
103         TP_NVRAM_ADDR_BRIGHTNESS        = 0x5e,
104         TP_NVRAM_ADDR_MIXER             = 0x60,
105 };
106
107 /* NVRAM bit masks */
108 enum {
109         TP_NVRAM_MASK_HKT_THINKPAD      = 0x08,
110         TP_NVRAM_MASK_HKT_ZOOM          = 0x20,
111         TP_NVRAM_MASK_HKT_DISPLAY       = 0x40,
112         TP_NVRAM_MASK_HKT_HIBERNATE     = 0x80,
113         TP_NVRAM_MASK_THINKLIGHT        = 0x10,
114         TP_NVRAM_MASK_HKT_DISPEXPND     = 0x30,
115         TP_NVRAM_MASK_HKT_BRIGHTNESS    = 0x20,
116         TP_NVRAM_MASK_LEVEL_BRIGHTNESS  = 0x0f,
117         TP_NVRAM_POS_LEVEL_BRIGHTNESS   = 0,
118         TP_NVRAM_MASK_MUTE              = 0x40,
119         TP_NVRAM_MASK_HKT_VOLUME        = 0x80,
120         TP_NVRAM_MASK_LEVEL_VOLUME      = 0x0f,
121         TP_NVRAM_POS_LEVEL_VOLUME       = 0,
122 };
123
124 /* ACPI HIDs */
125 #define TPACPI_ACPI_HKEY_HID            "IBM0068"
126
127 /* Input IDs */
128 #define TPACPI_HKEY_INPUT_PRODUCT       0x5054 /* "TP" */
129 #define TPACPI_HKEY_INPUT_VERSION       0x4101
130
131 /* ACPI \WGSV commands */
132 enum {
133         TP_ACPI_WGSV_GET_STATE          = 0x01, /* Get state information */
134         TP_ACPI_WGSV_PWR_ON_ON_RESUME   = 0x02, /* Resume WWAN powered on */
135         TP_ACPI_WGSV_PWR_OFF_ON_RESUME  = 0x03, /* Resume WWAN powered off */
136         TP_ACPI_WGSV_SAVE_STATE         = 0x04, /* Save state for S4/S5 */
137 };
138
139 /* TP_ACPI_WGSV_GET_STATE bits */
140 enum {
141         TP_ACPI_WGSV_STATE_WWANEXIST    = 0x0001, /* WWAN hw available */
142         TP_ACPI_WGSV_STATE_WWANPWR      = 0x0002, /* WWAN radio enabled */
143         TP_ACPI_WGSV_STATE_WWANPWRRES   = 0x0004, /* WWAN state at resume */
144         TP_ACPI_WGSV_STATE_WWANBIOSOFF  = 0x0008, /* WWAN disabled in BIOS */
145         TP_ACPI_WGSV_STATE_BLTHEXIST    = 0x0001, /* BLTH hw available */
146         TP_ACPI_WGSV_STATE_BLTHPWR      = 0x0002, /* BLTH radio enabled */
147         TP_ACPI_WGSV_STATE_BLTHPWRRES   = 0x0004, /* BLTH state at resume */
148         TP_ACPI_WGSV_STATE_BLTHBIOSOFF  = 0x0008, /* BLTH disabled in BIOS */
149         TP_ACPI_WGSV_STATE_UWBEXIST     = 0x0010, /* UWB hw available */
150         TP_ACPI_WGSV_STATE_UWBPWR       = 0x0020, /* UWB radio enabled */
151 };
152
153 /* HKEY events */
154 enum tpacpi_hkey_event_t {
155         /* Hotkey-related */
156         TP_HKEY_EV_HOTKEY_BASE          = 0x1001, /* first hotkey (FN+F1) */
157         TP_HKEY_EV_BRGHT_UP             = 0x1010, /* Brightness up */
158         TP_HKEY_EV_BRGHT_DOWN           = 0x1011, /* Brightness down */
159         TP_HKEY_EV_VOL_UP               = 0x1015, /* Volume up or unmute */
160         TP_HKEY_EV_VOL_DOWN             = 0x1016, /* Volume down or unmute */
161         TP_HKEY_EV_VOL_MUTE             = 0x1017, /* Mixer output mute */
162
163         /* Reasons for waking up from S3/S4 */
164         TP_HKEY_EV_WKUP_S3_UNDOCK       = 0x2304, /* undock requested, S3 */
165         TP_HKEY_EV_WKUP_S4_UNDOCK       = 0x2404, /* undock requested, S4 */
166         TP_HKEY_EV_WKUP_S3_BAYEJ        = 0x2305, /* bay ejection req, S3 */
167         TP_HKEY_EV_WKUP_S4_BAYEJ        = 0x2405, /* bay ejection req, S4 */
168         TP_HKEY_EV_WKUP_S3_BATLOW       = 0x2313, /* battery empty, S3 */
169         TP_HKEY_EV_WKUP_S4_BATLOW       = 0x2413, /* battery empty, S4 */
170
171         /* Auto-sleep after eject request */
172         TP_HKEY_EV_BAYEJ_ACK            = 0x3003, /* bay ejection complete */
173         TP_HKEY_EV_UNDOCK_ACK           = 0x4003, /* undock complete */
174
175         /* Misc bay events */
176         TP_HKEY_EV_OPTDRV_EJ            = 0x3006, /* opt. drive tray ejected */
177
178         /* User-interface events */
179         TP_HKEY_EV_LID_CLOSE            = 0x5001, /* laptop lid closed */
180         TP_HKEY_EV_LID_OPEN             = 0x5002, /* laptop lid opened */
181         TP_HKEY_EV_TABLET_TABLET        = 0x5009, /* tablet swivel up */
182         TP_HKEY_EV_TABLET_NOTEBOOK      = 0x500a, /* tablet swivel down */
183         TP_HKEY_EV_PEN_INSERTED         = 0x500b, /* tablet pen inserted */
184         TP_HKEY_EV_PEN_REMOVED          = 0x500c, /* tablet pen removed */
185         TP_HKEY_EV_BRGHT_CHANGED        = 0x5010, /* backlight control event */
186
187         /* Thermal events */
188         TP_HKEY_EV_ALARM_BAT_HOT        = 0x6011, /* battery too hot */
189         TP_HKEY_EV_ALARM_BAT_XHOT       = 0x6012, /* battery critically hot */
190         TP_HKEY_EV_ALARM_SENSOR_HOT     = 0x6021, /* sensor too hot */
191         TP_HKEY_EV_ALARM_SENSOR_XHOT    = 0x6022, /* sensor critically hot */
192         TP_HKEY_EV_THM_TABLE_CHANGED    = 0x6030, /* thermal table changed */
193
194         /* Misc */
195         TP_HKEY_EV_RFKILL_CHANGED       = 0x7000, /* rfkill switch changed */
196 };
197
198 /****************************************************************************
199  * Main driver
200  */
201
202 #define TPACPI_NAME "thinkpad"
203 #define TPACPI_DESC "ThinkPad ACPI Extras"
204 #define TPACPI_FILE TPACPI_NAME "_acpi"
205 #define TPACPI_URL "http://ibm-acpi.sf.net/"
206 #define TPACPI_MAIL "ibm-acpi-devel@lists.sourceforge.net"
207
208 #define TPACPI_PROC_DIR "ibm"
209 #define TPACPI_ACPI_EVENT_PREFIX "ibm"
210 #define TPACPI_DRVR_NAME TPACPI_FILE
211 #define TPACPI_DRVR_SHORTNAME "tpacpi"
212 #define TPACPI_HWMON_DRVR_NAME TPACPI_NAME "_hwmon"
213
214 #define TPACPI_NVRAM_KTHREAD_NAME "ktpacpi_nvramd"
215 #define TPACPI_WORKQUEUE_NAME "ktpacpid"
216
217 #define TPACPI_MAX_ACPI_ARGS 3
218
219 /* printk headers */
220 #define TPACPI_LOG TPACPI_FILE ": "
221 #define TPACPI_EMERG    KERN_EMERG      TPACPI_LOG
222 #define TPACPI_ALERT    KERN_ALERT      TPACPI_LOG
223 #define TPACPI_CRIT     KERN_CRIT       TPACPI_LOG
224 #define TPACPI_ERR      KERN_ERR        TPACPI_LOG
225 #define TPACPI_WARN     KERN_WARNING    TPACPI_LOG
226 #define TPACPI_NOTICE   KERN_NOTICE     TPACPI_LOG
227 #define TPACPI_INFO     KERN_INFO       TPACPI_LOG
228 #define TPACPI_DEBUG    KERN_DEBUG      TPACPI_LOG
229
230 /* Debugging printk groups */
231 #define TPACPI_DBG_ALL          0xffff
232 #define TPACPI_DBG_DISCLOSETASK 0x8000
233 #define TPACPI_DBG_INIT         0x0001
234 #define TPACPI_DBG_EXIT         0x0002
235 #define TPACPI_DBG_RFKILL       0x0004
236 #define TPACPI_DBG_HKEY         0x0008
237 #define TPACPI_DBG_FAN          0x0010
238 #define TPACPI_DBG_BRGHT        0x0020
239 #define TPACPI_DBG_MIXER        0x0040
240
241 #define onoff(status, bit) ((status) & (1 << (bit)) ? "on" : "off")
242 #define enabled(status, bit) ((status) & (1 << (bit)) ? "enabled" : "disabled")
243 #define strlencmp(a, b) (strncmp((a), (b), strlen(b)))
244
245
246 /****************************************************************************
247  * Driver-wide structs and misc. variables
248  */
249
250 struct ibm_struct;
251
252 struct tp_acpi_drv_struct {
253         const struct acpi_device_id *hid;
254         struct acpi_driver *driver;
255
256         void (*notify) (struct ibm_struct *, u32);
257         acpi_handle *handle;
258         u32 type;
259         struct acpi_device *device;
260 };
261
262 struct ibm_struct {
263         char *name;
264
265         int (*read) (struct seq_file *);
266         int (*write) (char *);
267         void (*exit) (void);
268         void (*resume) (void);
269         void (*suspend) (pm_message_t state);
270         void (*shutdown) (void);
271
272         struct list_head all_drivers;
273
274         struct tp_acpi_drv_struct *acpi;
275
276         struct {
277                 u8 acpi_driver_registered:1;
278                 u8 acpi_notify_installed:1;
279                 u8 proc_created:1;
280                 u8 init_called:1;
281                 u8 experimental:1;
282         } flags;
283 };
284
285 struct ibm_init_struct {
286         char param[32];
287
288         int (*init) (struct ibm_init_struct *);
289         struct ibm_struct *data;
290 };
291
292 static struct {
293         u32 bluetooth:1;
294         u32 hotkey:1;
295         u32 hotkey_mask:1;
296         u32 hotkey_wlsw:1;
297         u32 hotkey_tablet:1;
298         u32 light:1;
299         u32 light_status:1;
300         u32 bright_16levels:1;
301         u32 bright_acpimode:1;
302         u32 wan:1;
303         u32 uwb:1;
304         u32 fan_ctrl_status_undef:1;
305         u32 second_fan:1;
306         u32 beep_needs_two_args:1;
307         u32 mixer_no_level_control:1;
308         u32 input_device_registered:1;
309         u32 platform_drv_registered:1;
310         u32 platform_drv_attrs_registered:1;
311         u32 sensors_pdrv_registered:1;
312         u32 sensors_pdrv_attrs_registered:1;
313         u32 sensors_pdev_attrs_registered:1;
314         u32 hotkey_poll_active:1;
315 } tp_features;
316
317 static struct {
318         u16 hotkey_mask_ff:1;
319         u16 volume_ctrl_forbidden:1;
320 } tp_warned;
321
322 struct thinkpad_id_data {
323         unsigned int vendor;    /* ThinkPad vendor:
324                                  * PCI_VENDOR_ID_IBM/PCI_VENDOR_ID_LENOVO */
325
326         char *bios_version_str; /* Something like 1ZET51WW (1.03z) */
327         char *ec_version_str;   /* Something like 1ZHT51WW-1.04a */
328
329         u16 bios_model;         /* 1Y = 0x5931, 0 = unknown */
330         u16 ec_model;
331         u16 bios_release;       /* 1ZETK1WW = 0x314b, 0 = unknown */
332         u16 ec_release;
333
334         char *model_str;        /* ThinkPad T43 */
335         char *nummodel_str;     /* 9384A9C for a 9384-A9C model */
336 };
337 static struct thinkpad_id_data thinkpad_id;
338
339 static enum {
340         TPACPI_LIFE_INIT = 0,
341         TPACPI_LIFE_RUNNING,
342         TPACPI_LIFE_EXITING,
343 } tpacpi_lifecycle;
344
345 static int experimental;
346 static u32 dbg_level;
347
348 static struct workqueue_struct *tpacpi_wq;
349
350 enum led_status_t {
351         TPACPI_LED_OFF = 0,
352         TPACPI_LED_ON,
353         TPACPI_LED_BLINK,
354 };
355
356 /* Special LED class that can defer work */
357 struct tpacpi_led_classdev {
358         struct led_classdev led_classdev;
359         struct work_struct work;
360         enum led_status_t new_state;
361         unsigned int led;
362 };
363
364 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
365 static int dbg_wlswemul;
366 static int tpacpi_wlsw_emulstate;
367 static int dbg_bluetoothemul;
368 static int tpacpi_bluetooth_emulstate;
369 static int dbg_wwanemul;
370 static int tpacpi_wwan_emulstate;
371 static int dbg_uwbemul;
372 static int tpacpi_uwb_emulstate;
373 #endif
374
375
376 /*************************************************************************
377  *  Debugging helpers
378  */
379
380 #define dbg_printk(a_dbg_level, format, arg...) \
381         do { if (dbg_level & (a_dbg_level)) \
382                 printk(TPACPI_DEBUG "%s: " format, __func__ , ## arg); \
383         } while (0)
384
385 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
386 #define vdbg_printk dbg_printk
387 static const char *str_supported(int is_supported);
388 #else
389 #define vdbg_printk(a_dbg_level, format, arg...) \
390         do { } while (0)
391 #endif
392
393 static void tpacpi_log_usertask(const char * const what)
394 {
395         printk(TPACPI_DEBUG "%s: access by process with PID %d\n",
396                 what, task_tgid_vnr(current));
397 }
398
399 #define tpacpi_disclose_usertask(what, format, arg...) \
400         do { \
401                 if (unlikely( \
402                     (dbg_level & TPACPI_DBG_DISCLOSETASK) && \
403                     (tpacpi_lifecycle == TPACPI_LIFE_RUNNING))) { \
404                         printk(TPACPI_DEBUG "%s: PID %d: " format, \
405                                 what, task_tgid_vnr(current), ## arg); \
406                 } \
407         } while (0)
408
409 /*
410  * Quirk handling helpers
411  *
412  * ThinkPad IDs and versions seen in the field so far
413  * are two-characters from the set [0-9A-Z], i.e. base 36.
414  *
415  * We use values well outside that range as specials.
416  */
417
418 #define TPACPI_MATCH_ANY                0xffffU
419 #define TPACPI_MATCH_UNKNOWN            0U
420
421 /* TPID('1', 'Y') == 0x5931 */
422 #define TPID(__c1, __c2) (((__c2) << 8) | (__c1))
423
424 #define TPACPI_Q_IBM(__id1, __id2, __quirk)     \
425         { .vendor = PCI_VENDOR_ID_IBM,          \
426           .bios = TPID(__id1, __id2),           \
427           .ec = TPACPI_MATCH_ANY,               \
428           .quirks = (__quirk) }
429
430 #define TPACPI_Q_LNV(__id1, __id2, __quirk)     \
431         { .vendor = PCI_VENDOR_ID_LENOVO,       \
432           .bios = TPID(__id1, __id2),           \
433           .ec = TPACPI_MATCH_ANY,               \
434           .quirks = (__quirk) }
435
436 #define TPACPI_QEC_LNV(__id1, __id2, __quirk)   \
437         { .vendor = PCI_VENDOR_ID_LENOVO,       \
438           .bios = TPACPI_MATCH_ANY,             \
439           .ec = TPID(__id1, __id2),             \
440           .quirks = (__quirk) }
441
442 struct tpacpi_quirk {
443         unsigned int vendor;
444         u16 bios;
445         u16 ec;
446         unsigned long quirks;
447 };
448
449 /**
450  * tpacpi_check_quirks() - search BIOS/EC version on a list
451  * @qlist:              array of &struct tpacpi_quirk
452  * @qlist_size:         number of elements in @qlist
453  *
454  * Iterates over a quirks list until one is found that matches the
455  * ThinkPad's vendor, BIOS and EC model.
456  *
457  * Returns 0 if nothing matches, otherwise returns the quirks field of
458  * the matching &struct tpacpi_quirk entry.
459  *
460  * The match criteria is: vendor, ec and bios much match.
461  */
462 static unsigned long __init tpacpi_check_quirks(
463                         const struct tpacpi_quirk *qlist,
464                         unsigned int qlist_size)
465 {
466         while (qlist_size) {
467                 if ((qlist->vendor == thinkpad_id.vendor ||
468                                 qlist->vendor == TPACPI_MATCH_ANY) &&
469                     (qlist->bios == thinkpad_id.bios_model ||
470                                 qlist->bios == TPACPI_MATCH_ANY) &&
471                     (qlist->ec == thinkpad_id.ec_model ||
472                                 qlist->ec == TPACPI_MATCH_ANY))
473                         return qlist->quirks;
474
475                 qlist_size--;
476                 qlist++;
477         }
478         return 0;
479 }
480
481
482 /****************************************************************************
483  ****************************************************************************
484  *
485  * ACPI Helpers and device model
486  *
487  ****************************************************************************
488  ****************************************************************************/
489
490 /*************************************************************************
491  * ACPI basic handles
492  */
493
494 static acpi_handle root_handle;
495
496 #define TPACPI_HANDLE(object, parent, paths...)                 \
497         static acpi_handle  object##_handle;                    \
498         static acpi_handle *object##_parent = &parent##_handle; \
499         static char        *object##_path;                      \
500         static char        *object##_paths[] = { paths }
501
502 TPACPI_HANDLE(ec, root, "\\_SB.PCI0.ISA.EC0",   /* 240, 240x */
503            "\\_SB.PCI.ISA.EC",  /* 570 */
504            "\\_SB.PCI0.ISA0.EC0",       /* 600e/x, 770e, 770x */
505            "\\_SB.PCI0.ISA.EC", /* A21e, A2xm/p, T20-22, X20-21 */
506            "\\_SB.PCI0.AD4S.EC0",       /* i1400, R30 */
507            "\\_SB.PCI0.ICH3.EC0",       /* R31 */
508            "\\_SB.PCI0.LPC.EC", /* all others */
509            );
510
511 TPACPI_HANDLE(ecrd, ec, "ECRD");        /* 570 */
512 TPACPI_HANDLE(ecwr, ec, "ECWR");        /* 570 */
513
514 TPACPI_HANDLE(cmos, root, "\\UCMS",     /* R50, R50e, R50p, R51, */
515                                         /* T4x, X31, X40 */
516            "\\CMOS",            /* A3x, G4x, R32, T23, T30, X22-24, X30 */
517            "\\CMS",             /* R40, R40e */
518            );                   /* all others */
519
520 TPACPI_HANDLE(hkey, ec, "\\_SB.HKEY",   /* 600e/x, 770e, 770x */
521            "^HKEY",             /* R30, R31 */
522            "HKEY",              /* all others */
523            );                   /* 570 */
524
525 TPACPI_HANDLE(vid, root, "\\_SB.PCI.AGP.VGA",   /* 570 */
526            "\\_SB.PCI0.AGP0.VID0",      /* 600e/x, 770x */
527            "\\_SB.PCI0.VID0",   /* 770e */
528            "\\_SB.PCI0.VID",    /* A21e, G4x, R50e, X30, X40 */
529            "\\_SB.PCI0.AGP.VID",        /* all others */
530            );                           /* R30, R31 */
531
532
533 /*************************************************************************
534  * ACPI helpers
535  */
536
537 static int acpi_evalf(acpi_handle handle,
538                       void *res, char *method, char *fmt, ...)
539 {
540         char *fmt0 = fmt;
541         struct acpi_object_list params;
542         union acpi_object in_objs[TPACPI_MAX_ACPI_ARGS];
543         struct acpi_buffer result, *resultp;
544         union acpi_object out_obj;
545         acpi_status status;
546         va_list ap;
547         char res_type;
548         int success;
549         int quiet;
550
551         if (!*fmt) {
552                 printk(TPACPI_ERR "acpi_evalf() called with empty format\n");
553                 return 0;
554         }
555
556         if (*fmt == 'q') {
557                 quiet = 1;
558                 fmt++;
559         } else
560                 quiet = 0;
561
562         res_type = *(fmt++);
563
564         params.count = 0;
565         params.pointer = &in_objs[0];
566
567         va_start(ap, fmt);
568         while (*fmt) {
569                 char c = *(fmt++);
570                 switch (c) {
571                 case 'd':       /* int */
572                         in_objs[params.count].integer.value = va_arg(ap, int);
573                         in_objs[params.count++].type = ACPI_TYPE_INTEGER;
574                         break;
575                         /* add more types as needed */
576                 default:
577                         printk(TPACPI_ERR "acpi_evalf() called "
578                                "with invalid format character '%c'\n", c);
579                         return 0;
580                 }
581         }
582         va_end(ap);
583
584         if (res_type != 'v') {
585                 result.length = sizeof(out_obj);
586                 result.pointer = &out_obj;
587                 resultp = &result;
588         } else
589                 resultp = NULL;
590
591         status = acpi_evaluate_object(handle, method, &params, resultp);
592
593         switch (res_type) {
594         case 'd':               /* int */
595                 if (res)
596                         *(int *)res = out_obj.integer.value;
597                 success = status == AE_OK && out_obj.type == ACPI_TYPE_INTEGER;
598                 break;
599         case 'v':               /* void */
600                 success = status == AE_OK;
601                 break;
602                 /* add more types as needed */
603         default:
604                 printk(TPACPI_ERR "acpi_evalf() called "
605                        "with invalid format character '%c'\n", res_type);
606                 return 0;
607         }
608
609         if (!success && !quiet)
610                 printk(TPACPI_ERR "acpi_evalf(%s, %s, ...) failed: %d\n",
611                        method, fmt0, status);
612
613         return success;
614 }
615
616 static int acpi_ec_read(int i, u8 *p)
617 {
618         int v;
619
620         if (ecrd_handle) {
621                 if (!acpi_evalf(ecrd_handle, &v, NULL, "dd", i))
622                         return 0;
623                 *p = v;
624         } else {
625                 if (ec_read(i, p) < 0)
626                         return 0;
627         }
628
629         return 1;
630 }
631
632 static int acpi_ec_write(int i, u8 v)
633 {
634         if (ecwr_handle) {
635                 if (!acpi_evalf(ecwr_handle, NULL, NULL, "vdd", i, v))
636                         return 0;
637         } else {
638                 if (ec_write(i, v) < 0)
639                         return 0;
640         }
641
642         return 1;
643 }
644
645 static int issue_thinkpad_cmos_command(int cmos_cmd)
646 {
647         if (!cmos_handle)
648                 return -ENXIO;
649
650         if (!acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd))
651                 return -EIO;
652
653         return 0;
654 }
655
656 /*************************************************************************
657  * ACPI device model
658  */
659
660 #define TPACPI_ACPIHANDLE_INIT(object) \
661         drv_acpi_handle_init(#object, &object##_handle, *object##_parent, \
662                 object##_paths, ARRAY_SIZE(object##_paths), &object##_path)
663
664 static void drv_acpi_handle_init(char *name,
665                            acpi_handle *handle, acpi_handle parent,
666                            char **paths, int num_paths, char **path)
667 {
668         int i;
669         acpi_status status;
670
671         vdbg_printk(TPACPI_DBG_INIT, "trying to locate ACPI handle for %s\n",
672                 name);
673
674         for (i = 0; i < num_paths; i++) {
675                 status = acpi_get_handle(parent, paths[i], handle);
676                 if (ACPI_SUCCESS(status)) {
677                         *path = paths[i];
678                         dbg_printk(TPACPI_DBG_INIT,
679                                    "Found ACPI handle %s for %s\n",
680                                    *path, name);
681                         return;
682                 }
683         }
684
685         vdbg_printk(TPACPI_DBG_INIT, "ACPI handle for %s not found\n",
686                     name);
687         *handle = NULL;
688 }
689
690 static void dispatch_acpi_notify(acpi_handle handle, u32 event, void *data)
691 {
692         struct ibm_struct *ibm = data;
693
694         if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
695                 return;
696
697         if (!ibm || !ibm->acpi || !ibm->acpi->notify)
698                 return;
699
700         ibm->acpi->notify(ibm, event);
701 }
702
703 static int __init setup_acpi_notify(struct ibm_struct *ibm)
704 {
705         acpi_status status;
706         int rc;
707
708         BUG_ON(!ibm->acpi);
709
710         if (!*ibm->acpi->handle)
711                 return 0;
712
713         vdbg_printk(TPACPI_DBG_INIT,
714                 "setting up ACPI notify for %s\n", ibm->name);
715
716         rc = acpi_bus_get_device(*ibm->acpi->handle, &ibm->acpi->device);
717         if (rc < 0) {
718                 printk(TPACPI_ERR "acpi_bus_get_device(%s) failed: %d\n",
719                         ibm->name, rc);
720                 return -ENODEV;
721         }
722
723         ibm->acpi->device->driver_data = ibm;
724         sprintf(acpi_device_class(ibm->acpi->device), "%s/%s",
725                 TPACPI_ACPI_EVENT_PREFIX,
726                 ibm->name);
727
728         status = acpi_install_notify_handler(*ibm->acpi->handle,
729                         ibm->acpi->type, dispatch_acpi_notify, ibm);
730         if (ACPI_FAILURE(status)) {
731                 if (status == AE_ALREADY_EXISTS) {
732                         printk(TPACPI_NOTICE
733                                "another device driver is already "
734                                "handling %s events\n", ibm->name);
735                 } else {
736                         printk(TPACPI_ERR
737                                "acpi_install_notify_handler(%s) failed: %d\n",
738                                ibm->name, status);
739                 }
740                 return -ENODEV;
741         }
742         ibm->flags.acpi_notify_installed = 1;
743         return 0;
744 }
745
746 static int __init tpacpi_device_add(struct acpi_device *device)
747 {
748         return 0;
749 }
750
751 static int __init register_tpacpi_subdriver(struct ibm_struct *ibm)
752 {
753         int rc;
754
755         dbg_printk(TPACPI_DBG_INIT,
756                 "registering %s as an ACPI driver\n", ibm->name);
757
758         BUG_ON(!ibm->acpi);
759
760         ibm->acpi->driver = kzalloc(sizeof(struct acpi_driver), GFP_KERNEL);
761         if (!ibm->acpi->driver) {
762                 printk(TPACPI_ERR
763                        "failed to allocate memory for ibm->acpi->driver\n");
764                 return -ENOMEM;
765         }
766
767         sprintf(ibm->acpi->driver->name, "%s_%s", TPACPI_NAME, ibm->name);
768         ibm->acpi->driver->ids = ibm->acpi->hid;
769
770         ibm->acpi->driver->ops.add = &tpacpi_device_add;
771
772         rc = acpi_bus_register_driver(ibm->acpi->driver);
773         if (rc < 0) {
774                 printk(TPACPI_ERR "acpi_bus_register_driver(%s) failed: %d\n",
775                        ibm->name, rc);
776                 kfree(ibm->acpi->driver);
777                 ibm->acpi->driver = NULL;
778         } else if (!rc)
779                 ibm->flags.acpi_driver_registered = 1;
780
781         return rc;
782 }
783
784
785 /****************************************************************************
786  ****************************************************************************
787  *
788  * Procfs Helpers
789  *
790  ****************************************************************************
791  ****************************************************************************/
792
793 static int dispatch_proc_show(struct seq_file *m, void *v)
794 {
795         struct ibm_struct *ibm = m->private;
796
797         if (!ibm || !ibm->read)
798                 return -EINVAL;
799         return ibm->read(m);
800 }
801
802 static int dispatch_proc_open(struct inode *inode, struct file *file)
803 {
804         return single_open(file, dispatch_proc_show, PDE(inode)->data);
805 }
806
807 static ssize_t dispatch_proc_write(struct file *file,
808                         const char __user *userbuf,
809                         size_t count, loff_t *pos)
810 {
811         struct ibm_struct *ibm = PDE(file->f_path.dentry->d_inode)->data;
812         char *kernbuf;
813         int ret;
814
815         if (!ibm || !ibm->write)
816                 return -EINVAL;
817         if (count > PAGE_SIZE - 2)
818                 return -EINVAL;
819
820         kernbuf = kmalloc(count + 2, GFP_KERNEL);
821         if (!kernbuf)
822                 return -ENOMEM;
823
824         if (copy_from_user(kernbuf, userbuf, count)) {
825                 kfree(kernbuf);
826                 return -EFAULT;
827         }
828
829         kernbuf[count] = 0;
830         strcat(kernbuf, ",");
831         ret = ibm->write(kernbuf);
832         if (ret == 0)
833                 ret = count;
834
835         kfree(kernbuf);
836
837         return ret;
838 }
839
840 static const struct file_operations dispatch_proc_fops = {
841         .owner          = THIS_MODULE,
842         .open           = dispatch_proc_open,
843         .read           = seq_read,
844         .llseek         = seq_lseek,
845         .release        = single_release,
846         .write          = dispatch_proc_write,
847 };
848
849 static char *next_cmd(char **cmds)
850 {
851         char *start = *cmds;
852         char *end;
853
854         while ((end = strchr(start, ',')) && end == start)
855                 start = end + 1;
856
857         if (!end)
858                 return NULL;
859
860         *end = 0;
861         *cmds = end + 1;
862         return start;
863 }
864
865
866 /****************************************************************************
867  ****************************************************************************
868  *
869  * Device model: input, hwmon and platform
870  *
871  ****************************************************************************
872  ****************************************************************************/
873
874 static struct platform_device *tpacpi_pdev;
875 static struct platform_device *tpacpi_sensors_pdev;
876 static struct device *tpacpi_hwmon;
877 static struct input_dev *tpacpi_inputdev;
878 static struct mutex tpacpi_inputdev_send_mutex;
879 static LIST_HEAD(tpacpi_all_drivers);
880
881 static int tpacpi_suspend_handler(struct platform_device *pdev,
882                                   pm_message_t state)
883 {
884         struct ibm_struct *ibm, *itmp;
885
886         list_for_each_entry_safe(ibm, itmp,
887                                  &tpacpi_all_drivers,
888                                  all_drivers) {
889                 if (ibm->suspend)
890                         (ibm->suspend)(state);
891         }
892
893         return 0;
894 }
895
896 static int tpacpi_resume_handler(struct platform_device *pdev)
897 {
898         struct ibm_struct *ibm, *itmp;
899
900         list_for_each_entry_safe(ibm, itmp,
901                                  &tpacpi_all_drivers,
902                                  all_drivers) {
903                 if (ibm->resume)
904                         (ibm->resume)();
905         }
906
907         return 0;
908 }
909
910 static void tpacpi_shutdown_handler(struct platform_device *pdev)
911 {
912         struct ibm_struct *ibm, *itmp;
913
914         list_for_each_entry_safe(ibm, itmp,
915                                  &tpacpi_all_drivers,
916                                  all_drivers) {
917                 if (ibm->shutdown)
918                         (ibm->shutdown)();
919         }
920 }
921
922 static struct platform_driver tpacpi_pdriver = {
923         .driver = {
924                 .name = TPACPI_DRVR_NAME,
925                 .owner = THIS_MODULE,
926         },
927         .suspend = tpacpi_suspend_handler,
928         .resume = tpacpi_resume_handler,
929         .shutdown = tpacpi_shutdown_handler,
930 };
931
932 static struct platform_driver tpacpi_hwmon_pdriver = {
933         .driver = {
934                 .name = TPACPI_HWMON_DRVR_NAME,
935                 .owner = THIS_MODULE,
936         },
937 };
938
939 /*************************************************************************
940  * sysfs support helpers
941  */
942
943 struct attribute_set {
944         unsigned int members, max_members;
945         struct attribute_group group;
946 };
947
948 struct attribute_set_obj {
949         struct attribute_set s;
950         struct attribute *a;
951 } __attribute__((packed));
952
953 static struct attribute_set *create_attr_set(unsigned int max_members,
954                                                 const char *name)
955 {
956         struct attribute_set_obj *sobj;
957
958         if (max_members == 0)
959                 return NULL;
960
961         /* Allocates space for implicit NULL at the end too */
962         sobj = kzalloc(sizeof(struct attribute_set_obj) +
963                     max_members * sizeof(struct attribute *),
964                     GFP_KERNEL);
965         if (!sobj)
966                 return NULL;
967         sobj->s.max_members = max_members;
968         sobj->s.group.attrs = &sobj->a;
969         sobj->s.group.name = name;
970
971         return &sobj->s;
972 }
973
974 #define destroy_attr_set(_set) \
975         kfree(_set);
976
977 /* not multi-threaded safe, use it in a single thread per set */
978 static int add_to_attr_set(struct attribute_set *s, struct attribute *attr)
979 {
980         if (!s || !attr)
981                 return -EINVAL;
982
983         if (s->members >= s->max_members)
984                 return -ENOMEM;
985
986         s->group.attrs[s->members] = attr;
987         s->members++;
988
989         return 0;
990 }
991
992 static int add_many_to_attr_set(struct attribute_set *s,
993                         struct attribute **attr,
994                         unsigned int count)
995 {
996         int i, res;
997
998         for (i = 0; i < count; i++) {
999                 res = add_to_attr_set(s, attr[i]);
1000                 if (res)
1001                         return res;
1002         }
1003
1004         return 0;
1005 }
1006
1007 static void delete_attr_set(struct attribute_set *s, struct kobject *kobj)
1008 {
1009         sysfs_remove_group(kobj, &s->group);
1010         destroy_attr_set(s);
1011 }
1012
1013 #define register_attr_set_with_sysfs(_attr_set, _kobj) \
1014         sysfs_create_group(_kobj, &_attr_set->group)
1015
1016 static int parse_strtoul(const char *buf,
1017                 unsigned long max, unsigned long *value)
1018 {
1019         char *endp;
1020
1021         while (*buf && isspace(*buf))
1022                 buf++;
1023         *value = simple_strtoul(buf, &endp, 0);
1024         while (*endp && isspace(*endp))
1025                 endp++;
1026         if (*endp || *value > max)
1027                 return -EINVAL;
1028
1029         return 0;
1030 }
1031
1032 static void tpacpi_disable_brightness_delay(void)
1033 {
1034         if (acpi_evalf(hkey_handle, NULL, "PWMS", "qvd", 0))
1035                 printk(TPACPI_NOTICE
1036                         "ACPI backlight control delay disabled\n");
1037 }
1038
1039 static int __init tpacpi_query_bcl_levels(acpi_handle handle)
1040 {
1041         struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
1042         union acpi_object *obj;
1043         int rc;
1044
1045         if (ACPI_SUCCESS(acpi_evaluate_object(handle, NULL, NULL, &buffer))) {
1046                 obj = (union acpi_object *)buffer.pointer;
1047                 if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) {
1048                         printk(TPACPI_ERR "Unknown _BCL data, "
1049                                "please report this to %s\n", TPACPI_MAIL);
1050                         rc = 0;
1051                 } else {
1052                         rc = obj->package.count;
1053                 }
1054         } else {
1055                 return 0;
1056         }
1057
1058         kfree(buffer.pointer);
1059         return rc;
1060 }
1061
1062 static acpi_status __init tpacpi_acpi_walk_find_bcl(acpi_handle handle,
1063                                         u32 lvl, void *context, void **rv)
1064 {
1065         char name[ACPI_PATH_SEGMENT_LENGTH];
1066         struct acpi_buffer buffer = { sizeof(name), &name };
1067
1068         if (ACPI_SUCCESS(acpi_get_name(handle, ACPI_SINGLE_NAME, &buffer)) &&
1069             !strncmp("_BCL", name, sizeof(name) - 1)) {
1070                 BUG_ON(!rv || !*rv);
1071                 **(int **)rv = tpacpi_query_bcl_levels(handle);
1072                 return AE_CTRL_TERMINATE;
1073         } else {
1074                 return AE_OK;
1075         }
1076 }
1077
1078 /*
1079  * Returns 0 (no ACPI _BCL or _BCL invalid), or size of brightness map
1080  */
1081 static int __init tpacpi_check_std_acpi_brightness_support(void)
1082 {
1083         int status;
1084         int bcl_levels = 0;
1085         void *bcl_ptr = &bcl_levels;
1086
1087         if (!vid_handle) {
1088                 TPACPI_ACPIHANDLE_INIT(vid);
1089         }
1090         if (!vid_handle)
1091                 return 0;
1092
1093         /*
1094          * Search for a _BCL method, and execute it.  This is safe on all
1095          * ThinkPads, and as a side-effect, _BCL will place a Lenovo Vista
1096          * BIOS in ACPI backlight control mode.  We do NOT have to care
1097          * about calling the _BCL method in an enabled video device, any
1098          * will do for our purposes.
1099          */
1100
1101         status = acpi_walk_namespace(ACPI_TYPE_METHOD, vid_handle, 3,
1102                                      tpacpi_acpi_walk_find_bcl, NULL,
1103                                      &bcl_ptr);
1104
1105         if (ACPI_SUCCESS(status) && bcl_levels > 2) {
1106                 tp_features.bright_acpimode = 1;
1107                 return (bcl_levels - 2);
1108         }
1109
1110         return 0;
1111 }
1112
1113 static void printk_deprecated_attribute(const char * const what,
1114                                         const char * const details)
1115 {
1116         tpacpi_log_usertask("deprecated sysfs attribute");
1117         printk(TPACPI_WARN "WARNING: sysfs attribute %s is deprecated and "
1118                 "will be removed. %s\n",
1119                 what, details);
1120 }
1121
1122 /*************************************************************************
1123  * rfkill and radio control support helpers
1124  */
1125
1126 /*
1127  * ThinkPad-ACPI firmware handling model:
1128  *
1129  * WLSW (master wireless switch) is event-driven, and is common to all
1130  * firmware-controlled radios.  It cannot be controlled, just monitored,
1131  * as expected.  It overrides all radio state in firmware
1132  *
1133  * The kernel, a masked-off hotkey, and WLSW can change the radio state
1134  * (TODO: verify how WLSW interacts with the returned radio state).
1135  *
1136  * The only time there are shadow radio state changes, is when
1137  * masked-off hotkeys are used.
1138  */
1139
1140 /*
1141  * Internal driver API for radio state:
1142  *
1143  * int: < 0 = error, otherwise enum tpacpi_rfkill_state
1144  * bool: true means radio blocked (off)
1145  */
1146 enum tpacpi_rfkill_state {
1147         TPACPI_RFK_RADIO_OFF = 0,
1148         TPACPI_RFK_RADIO_ON
1149 };
1150
1151 /* rfkill switches */
1152 enum tpacpi_rfk_id {
1153         TPACPI_RFK_BLUETOOTH_SW_ID = 0,
1154         TPACPI_RFK_WWAN_SW_ID,
1155         TPACPI_RFK_UWB_SW_ID,
1156         TPACPI_RFK_SW_MAX
1157 };
1158
1159 static const char *tpacpi_rfkill_names[] = {
1160         [TPACPI_RFK_BLUETOOTH_SW_ID] = "bluetooth",
1161         [TPACPI_RFK_WWAN_SW_ID] = "wwan",
1162         [TPACPI_RFK_UWB_SW_ID] = "uwb",
1163         [TPACPI_RFK_SW_MAX] = NULL
1164 };
1165
1166 /* ThinkPad-ACPI rfkill subdriver */
1167 struct tpacpi_rfk {
1168         struct rfkill *rfkill;
1169         enum tpacpi_rfk_id id;
1170         const struct tpacpi_rfk_ops *ops;
1171 };
1172
1173 struct tpacpi_rfk_ops {
1174         /* firmware interface */
1175         int (*get_status)(void);
1176         int (*set_status)(const enum tpacpi_rfkill_state);
1177 };
1178
1179 static struct tpacpi_rfk *tpacpi_rfkill_switches[TPACPI_RFK_SW_MAX];
1180
1181 /* Query FW and update rfkill sw state for a given rfkill switch */
1182 static int tpacpi_rfk_update_swstate(const struct tpacpi_rfk *tp_rfk)
1183 {
1184         int status;
1185
1186         if (!tp_rfk)
1187                 return -ENODEV;
1188
1189         status = (tp_rfk->ops->get_status)();
1190         if (status < 0)
1191                 return status;
1192
1193         rfkill_set_sw_state(tp_rfk->rfkill,
1194                             (status == TPACPI_RFK_RADIO_OFF));
1195
1196         return status;
1197 }
1198
1199 /* Query FW and update rfkill sw state for all rfkill switches */
1200 static void tpacpi_rfk_update_swstate_all(void)
1201 {
1202         unsigned int i;
1203
1204         for (i = 0; i < TPACPI_RFK_SW_MAX; i++)
1205                 tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[i]);
1206 }
1207
1208 /*
1209  * Sync the HW-blocking state of all rfkill switches,
1210  * do notice it causes the rfkill core to schedule uevents
1211  */
1212 static void tpacpi_rfk_update_hwblock_state(bool blocked)
1213 {
1214         unsigned int i;
1215         struct tpacpi_rfk *tp_rfk;
1216
1217         for (i = 0; i < TPACPI_RFK_SW_MAX; i++) {
1218                 tp_rfk = tpacpi_rfkill_switches[i];
1219                 if (tp_rfk) {
1220                         if (rfkill_set_hw_state(tp_rfk->rfkill,
1221                                                 blocked)) {
1222                                 /* ignore -- we track sw block */
1223                         }
1224                 }
1225         }
1226 }
1227
1228 /* Call to get the WLSW state from the firmware */
1229 static int hotkey_get_wlsw(void);
1230
1231 /* Call to query WLSW state and update all rfkill switches */
1232 static bool tpacpi_rfk_check_hwblock_state(void)
1233 {
1234         int res = hotkey_get_wlsw();
1235         int hw_blocked;
1236
1237         /* When unknown or unsupported, we have to assume it is unblocked */
1238         if (res < 0)
1239                 return false;
1240
1241         hw_blocked = (res == TPACPI_RFK_RADIO_OFF);
1242         tpacpi_rfk_update_hwblock_state(hw_blocked);
1243
1244         return hw_blocked;
1245 }
1246
1247 static int tpacpi_rfk_hook_set_block(void *data, bool blocked)
1248 {
1249         struct tpacpi_rfk *tp_rfk = data;
1250         int res;
1251
1252         dbg_printk(TPACPI_DBG_RFKILL,
1253                    "request to change radio state to %s\n",
1254                    blocked ? "blocked" : "unblocked");
1255
1256         /* try to set radio state */
1257         res = (tp_rfk->ops->set_status)(blocked ?
1258                                 TPACPI_RFK_RADIO_OFF : TPACPI_RFK_RADIO_ON);
1259
1260         /* and update the rfkill core with whatever the FW really did */
1261         tpacpi_rfk_update_swstate(tp_rfk);
1262
1263         return (res < 0) ? res : 0;
1264 }
1265
1266 static const struct rfkill_ops tpacpi_rfk_rfkill_ops = {
1267         .set_block = tpacpi_rfk_hook_set_block,
1268 };
1269
1270 static int __init tpacpi_new_rfkill(const enum tpacpi_rfk_id id,
1271                         const struct tpacpi_rfk_ops *tp_rfkops,
1272                         const enum rfkill_type rfktype,
1273                         const char *name,
1274                         const bool set_default)
1275 {
1276         struct tpacpi_rfk *atp_rfk;
1277         int res;
1278         bool sw_state = false;
1279         bool hw_state;
1280         int sw_status;
1281
1282         BUG_ON(id >= TPACPI_RFK_SW_MAX || tpacpi_rfkill_switches[id]);
1283
1284         atp_rfk = kzalloc(sizeof(struct tpacpi_rfk), GFP_KERNEL);
1285         if (atp_rfk)
1286                 atp_rfk->rfkill = rfkill_alloc(name,
1287                                                 &tpacpi_pdev->dev,
1288                                                 rfktype,
1289                                                 &tpacpi_rfk_rfkill_ops,
1290                                                 atp_rfk);
1291         if (!atp_rfk || !atp_rfk->rfkill) {
1292                 printk(TPACPI_ERR
1293                         "failed to allocate memory for rfkill class\n");
1294                 kfree(atp_rfk);
1295                 return -ENOMEM;
1296         }
1297
1298         atp_rfk->id = id;
1299         atp_rfk->ops = tp_rfkops;
1300
1301         sw_status = (tp_rfkops->get_status)();
1302         if (sw_status < 0) {
1303                 printk(TPACPI_ERR
1304                         "failed to read initial state for %s, error %d\n",
1305                         name, sw_status);
1306         } else {
1307                 sw_state = (sw_status == TPACPI_RFK_RADIO_OFF);
1308                 if (set_default) {
1309                         /* try to keep the initial state, since we ask the
1310                          * firmware to preserve it across S5 in NVRAM */
1311                         rfkill_init_sw_state(atp_rfk->rfkill, sw_state);
1312                 }
1313         }
1314         hw_state = tpacpi_rfk_check_hwblock_state();
1315         rfkill_set_hw_state(atp_rfk->rfkill, hw_state);
1316
1317         res = rfkill_register(atp_rfk->rfkill);
1318         if (res < 0) {
1319                 printk(TPACPI_ERR
1320                         "failed to register %s rfkill switch: %d\n",
1321                         name, res);
1322                 rfkill_destroy(atp_rfk->rfkill);
1323                 kfree(atp_rfk);
1324                 return res;
1325         }
1326
1327         tpacpi_rfkill_switches[id] = atp_rfk;
1328
1329         printk(TPACPI_INFO "rfkill switch %s: radio is %sblocked\n",
1330                 name, (sw_state || hw_state) ? "" : "un");
1331         return 0;
1332 }
1333
1334 static void tpacpi_destroy_rfkill(const enum tpacpi_rfk_id id)
1335 {
1336         struct tpacpi_rfk *tp_rfk;
1337
1338         BUG_ON(id >= TPACPI_RFK_SW_MAX);
1339
1340         tp_rfk = tpacpi_rfkill_switches[id];
1341         if (tp_rfk) {
1342                 rfkill_unregister(tp_rfk->rfkill);
1343                 rfkill_destroy(tp_rfk->rfkill);
1344                 tpacpi_rfkill_switches[id] = NULL;
1345                 kfree(tp_rfk);
1346         }
1347 }
1348
1349 static void printk_deprecated_rfkill_attribute(const char * const what)
1350 {
1351         printk_deprecated_attribute(what,
1352                         "Please switch to generic rfkill before year 2010");
1353 }
1354
1355 /* sysfs <radio> enable ------------------------------------------------ */
1356 static ssize_t tpacpi_rfk_sysfs_enable_show(const enum tpacpi_rfk_id id,
1357                                             struct device_attribute *attr,
1358                                             char *buf)
1359 {
1360         int status;
1361
1362         printk_deprecated_rfkill_attribute(attr->attr.name);
1363
1364         /* This is in the ABI... */
1365         if (tpacpi_rfk_check_hwblock_state()) {
1366                 status = TPACPI_RFK_RADIO_OFF;
1367         } else {
1368                 status = tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]);
1369                 if (status < 0)
1370                         return status;
1371         }
1372
1373         return snprintf(buf, PAGE_SIZE, "%d\n",
1374                         (status == TPACPI_RFK_RADIO_ON) ? 1 : 0);
1375 }
1376
1377 static ssize_t tpacpi_rfk_sysfs_enable_store(const enum tpacpi_rfk_id id,
1378                             struct device_attribute *attr,
1379                             const char *buf, size_t count)
1380 {
1381         unsigned long t;
1382         int res;
1383
1384         printk_deprecated_rfkill_attribute(attr->attr.name);
1385
1386         if (parse_strtoul(buf, 1, &t))
1387                 return -EINVAL;
1388
1389         tpacpi_disclose_usertask(attr->attr.name, "set to %ld\n", t);
1390
1391         /* This is in the ABI... */
1392         if (tpacpi_rfk_check_hwblock_state() && !!t)
1393                 return -EPERM;
1394
1395         res = tpacpi_rfkill_switches[id]->ops->set_status((!!t) ?
1396                                 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF);
1397         tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]);
1398
1399         return (res < 0) ? res : count;
1400 }
1401
1402 /* procfs -------------------------------------------------------------- */
1403 static int tpacpi_rfk_procfs_read(const enum tpacpi_rfk_id id, struct seq_file *m)
1404 {
1405         if (id >= TPACPI_RFK_SW_MAX)
1406                 seq_printf(m, "status:\t\tnot supported\n");
1407         else {
1408                 int status;
1409
1410                 /* This is in the ABI... */
1411                 if (tpacpi_rfk_check_hwblock_state()) {
1412                         status = TPACPI_RFK_RADIO_OFF;
1413                 } else {
1414                         status = tpacpi_rfk_update_swstate(
1415                                                 tpacpi_rfkill_switches[id]);
1416                         if (status < 0)
1417                                 return status;
1418                 }
1419
1420                 seq_printf(m, "status:\t\t%s\n",
1421                                 (status == TPACPI_RFK_RADIO_ON) ?
1422                                         "enabled" : "disabled");
1423                 seq_printf(m, "commands:\tenable, disable\n");
1424         }
1425
1426         return 0;
1427 }
1428
1429 static int tpacpi_rfk_procfs_write(const enum tpacpi_rfk_id id, char *buf)
1430 {
1431         char *cmd;
1432         int status = -1;
1433         int res = 0;
1434
1435         if (id >= TPACPI_RFK_SW_MAX)
1436                 return -ENODEV;
1437
1438         while ((cmd = next_cmd(&buf))) {
1439                 if (strlencmp(cmd, "enable") == 0)
1440                         status = TPACPI_RFK_RADIO_ON;
1441                 else if (strlencmp(cmd, "disable") == 0)
1442                         status = TPACPI_RFK_RADIO_OFF;
1443                 else
1444                         return -EINVAL;
1445         }
1446
1447         if (status != -1) {
1448                 tpacpi_disclose_usertask("procfs", "attempt to %s %s\n",
1449                                 (status == TPACPI_RFK_RADIO_ON) ?
1450                                                 "enable" : "disable",
1451                                 tpacpi_rfkill_names[id]);
1452                 res = (tpacpi_rfkill_switches[id]->ops->set_status)(status);
1453                 tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]);
1454         }
1455
1456         return res;
1457 }
1458
1459 /*************************************************************************
1460  * thinkpad-acpi driver attributes
1461  */
1462
1463 /* interface_version --------------------------------------------------- */
1464 static ssize_t tpacpi_driver_interface_version_show(
1465                                 struct device_driver *drv,
1466                                 char *buf)
1467 {
1468         return snprintf(buf, PAGE_SIZE, "0x%08x\n", TPACPI_SYSFS_VERSION);
1469 }
1470
1471 static DRIVER_ATTR(interface_version, S_IRUGO,
1472                 tpacpi_driver_interface_version_show, NULL);
1473
1474 /* debug_level --------------------------------------------------------- */
1475 static ssize_t tpacpi_driver_debug_show(struct device_driver *drv,
1476                                                 char *buf)
1477 {
1478         return snprintf(buf, PAGE_SIZE, "0x%04x\n", dbg_level);
1479 }
1480
1481 static ssize_t tpacpi_driver_debug_store(struct device_driver *drv,
1482                                                 const char *buf, size_t count)
1483 {
1484         unsigned long t;
1485
1486         if (parse_strtoul(buf, 0xffff, &t))
1487                 return -EINVAL;
1488
1489         dbg_level = t;
1490
1491         return count;
1492 }
1493
1494 static DRIVER_ATTR(debug_level, S_IWUSR | S_IRUGO,
1495                 tpacpi_driver_debug_show, tpacpi_driver_debug_store);
1496
1497 /* version ------------------------------------------------------------- */
1498 static ssize_t tpacpi_driver_version_show(struct device_driver *drv,
1499                                                 char *buf)
1500 {
1501         return snprintf(buf, PAGE_SIZE, "%s v%s\n",
1502                         TPACPI_DESC, TPACPI_VERSION);
1503 }
1504
1505 static DRIVER_ATTR(version, S_IRUGO,
1506                 tpacpi_driver_version_show, NULL);
1507
1508 /* --------------------------------------------------------------------- */
1509
1510 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
1511
1512 /* wlsw_emulstate ------------------------------------------------------ */
1513 static ssize_t tpacpi_driver_wlsw_emulstate_show(struct device_driver *drv,
1514                                                 char *buf)
1515 {
1516         return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_wlsw_emulstate);
1517 }
1518
1519 static ssize_t tpacpi_driver_wlsw_emulstate_store(struct device_driver *drv,
1520                                                 const char *buf, size_t count)
1521 {
1522         unsigned long t;
1523
1524         if (parse_strtoul(buf, 1, &t))
1525                 return -EINVAL;
1526
1527         if (tpacpi_wlsw_emulstate != !!t) {
1528                 tpacpi_wlsw_emulstate = !!t;
1529                 tpacpi_rfk_update_hwblock_state(!t);    /* negative logic */
1530         }
1531
1532         return count;
1533 }
1534
1535 static DRIVER_ATTR(wlsw_emulstate, S_IWUSR | S_IRUGO,
1536                 tpacpi_driver_wlsw_emulstate_show,
1537                 tpacpi_driver_wlsw_emulstate_store);
1538
1539 /* bluetooth_emulstate ------------------------------------------------- */
1540 static ssize_t tpacpi_driver_bluetooth_emulstate_show(
1541                                         struct device_driver *drv,
1542                                         char *buf)
1543 {
1544         return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_bluetooth_emulstate);
1545 }
1546
1547 static ssize_t tpacpi_driver_bluetooth_emulstate_store(
1548                                         struct device_driver *drv,
1549                                         const char *buf, size_t count)
1550 {
1551         unsigned long t;
1552
1553         if (parse_strtoul(buf, 1, &t))
1554                 return -EINVAL;
1555
1556         tpacpi_bluetooth_emulstate = !!t;
1557
1558         return count;
1559 }
1560
1561 static DRIVER_ATTR(bluetooth_emulstate, S_IWUSR | S_IRUGO,
1562                 tpacpi_driver_bluetooth_emulstate_show,
1563                 tpacpi_driver_bluetooth_emulstate_store);
1564
1565 /* wwan_emulstate ------------------------------------------------- */
1566 static ssize_t tpacpi_driver_wwan_emulstate_show(
1567                                         struct device_driver *drv,
1568                                         char *buf)
1569 {
1570         return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_wwan_emulstate);
1571 }
1572
1573 static ssize_t tpacpi_driver_wwan_emulstate_store(
1574                                         struct device_driver *drv,
1575                                         const char *buf, size_t count)
1576 {
1577         unsigned long t;
1578
1579         if (parse_strtoul(buf, 1, &t))
1580                 return -EINVAL;
1581
1582         tpacpi_wwan_emulstate = !!t;
1583
1584         return count;
1585 }
1586
1587 static DRIVER_ATTR(wwan_emulstate, S_IWUSR | S_IRUGO,
1588                 tpacpi_driver_wwan_emulstate_show,
1589                 tpacpi_driver_wwan_emulstate_store);
1590
1591 /* uwb_emulstate ------------------------------------------------- */
1592 static ssize_t tpacpi_driver_uwb_emulstate_show(
1593                                         struct device_driver *drv,
1594                                         char *buf)
1595 {
1596         return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_uwb_emulstate);
1597 }
1598
1599 static ssize_t tpacpi_driver_uwb_emulstate_store(
1600                                         struct device_driver *drv,
1601                                         const char *buf, size_t count)
1602 {
1603         unsigned long t;
1604
1605         if (parse_strtoul(buf, 1, &t))
1606                 return -EINVAL;
1607
1608         tpacpi_uwb_emulstate = !!t;
1609
1610         return count;
1611 }
1612
1613 static DRIVER_ATTR(uwb_emulstate, S_IWUSR | S_IRUGO,
1614                 tpacpi_driver_uwb_emulstate_show,
1615                 tpacpi_driver_uwb_emulstate_store);
1616 #endif
1617
1618 /* --------------------------------------------------------------------- */
1619
1620 static struct driver_attribute *tpacpi_driver_attributes[] = {
1621         &driver_attr_debug_level, &driver_attr_version,
1622         &driver_attr_interface_version,
1623 };
1624
1625 static int __init tpacpi_create_driver_attributes(struct device_driver *drv)
1626 {
1627         int i, res;
1628
1629         i = 0;
1630         res = 0;
1631         while (!res && i < ARRAY_SIZE(tpacpi_driver_attributes)) {
1632                 res = driver_create_file(drv, tpacpi_driver_attributes[i]);
1633                 i++;
1634         }
1635
1636 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
1637         if (!res && dbg_wlswemul)
1638                 res = driver_create_file(drv, &driver_attr_wlsw_emulstate);
1639         if (!res && dbg_bluetoothemul)
1640                 res = driver_create_file(drv, &driver_attr_bluetooth_emulstate);
1641         if (!res && dbg_wwanemul)
1642                 res = driver_create_file(drv, &driver_attr_wwan_emulstate);
1643         if (!res && dbg_uwbemul)
1644                 res = driver_create_file(drv, &driver_attr_uwb_emulstate);
1645 #endif
1646
1647         return res;
1648 }
1649
1650 static void tpacpi_remove_driver_attributes(struct device_driver *drv)
1651 {
1652         int i;
1653
1654         for (i = 0; i < ARRAY_SIZE(tpacpi_driver_attributes); i++)
1655                 driver_remove_file(drv, tpacpi_driver_attributes[i]);
1656
1657 #ifdef THINKPAD_ACPI_DEBUGFACILITIES
1658         driver_remove_file(drv, &driver_attr_wlsw_emulstate);
1659         driver_remove_file(drv, &driver_attr_bluetooth_emulstate);
1660         driver_remove_file(drv, &driver_attr_wwan_emulstate);
1661         driver_remove_file(drv, &driver_attr_uwb_emulstate);
1662 #endif
1663 }
1664
1665 /*************************************************************************
1666  * Firmware Data
1667  */
1668
1669 /*
1670  * Table of recommended minimum BIOS versions
1671  *
1672  * Reasons for listing:
1673  *    1. Stable BIOS, listed because the unknown ammount of
1674  *       bugs and bad ACPI behaviour on older versions
1675  *
1676  *    2. BIOS or EC fw with known bugs that trigger on Linux
1677  *
1678  *    3. BIOS with known reduced functionality in older versions
1679  *
1680  *  We recommend the latest BIOS and EC version.
1681  *  We only support the latest BIOS and EC fw version as a rule.
1682  *
1683  *  Sources: IBM ThinkPad Public Web Documents (update changelogs),
1684  *  Information from users in ThinkWiki
1685  *
1686  *  WARNING: we use this table also to detect that the machine is
1687  *  a ThinkPad in some cases, so don't remove entries lightly.
1688  */
1689
1690 #define TPV_Q(__v, __id1, __id2, __bv1, __bv2)          \
1691         { .vendor       = (__v),                        \
1692           .bios         = TPID(__id1, __id2),           \
1693           .ec           = TPACPI_MATCH_ANY,             \
1694           .quirks       = TPACPI_MATCH_ANY << 16        \
1695                           | (__bv1) << 8 | (__bv2) }
1696
1697 #define TPV_Q_X(__v, __bid1, __bid2, __bv1, __bv2,      \
1698                 __eid, __ev1, __ev2)                    \
1699         { .vendor       = (__v),                        \
1700           .bios         = TPID(__bid1, __bid2),         \
1701           .ec           = __eid,                        \
1702           .quirks       = (__ev1) << 24 | (__ev2) << 16 \
1703                           | (__bv1) << 8 | (__bv2) }
1704
1705 #define TPV_QI0(__id1, __id2, __bv1, __bv2) \
1706         TPV_Q(PCI_VENDOR_ID_IBM, __id1, __id2, __bv1, __bv2)
1707
1708 /* Outdated IBM BIOSes often lack the EC id string */
1709 #define TPV_QI1(__id1, __id2, __bv1, __bv2, __ev1, __ev2) \
1710         TPV_Q_X(PCI_VENDOR_ID_IBM, __id1, __id2,        \
1711                 __bv1, __bv2, TPID(__id1, __id2),       \
1712                 __ev1, __ev2),                          \
1713         TPV_Q_X(PCI_VENDOR_ID_IBM, __id1, __id2,        \
1714                 __bv1, __bv2, TPACPI_MATCH_UNKNOWN,     \
1715                 __ev1, __ev2)
1716
1717 /* Outdated IBM BIOSes often lack the EC id string */
1718 #define TPV_QI2(__bid1, __bid2, __bv1, __bv2,           \
1719                 __eid1, __eid2, __ev1, __ev2)           \
1720         TPV_Q_X(PCI_VENDOR_ID_IBM, __bid1, __bid2,      \
1721                 __bv1, __bv2, TPID(__eid1, __eid2),     \
1722                 __ev1, __ev2),                          \
1723         TPV_Q_X(PCI_VENDOR_ID_IBM, __bid1, __bid2,      \
1724                 __bv1, __bv2, TPACPI_MATCH_UNKNOWN,     \
1725                 __ev1, __ev2)
1726
1727 #define TPV_QL0(__id1, __id2, __bv1, __bv2) \
1728         TPV_Q(PCI_VENDOR_ID_LENOVO, __id1, __id2, __bv1, __bv2)
1729
1730 #define TPV_QL1(__id1, __id2, __bv1, __bv2, __ev1, __ev2) \
1731         TPV_Q_X(PCI_VENDOR_ID_LENOVO, __id1, __id2,     \
1732                 __bv1, __bv2, TPID(__id1, __id2),       \
1733                 __ev1, __ev2)
1734
1735 #define TPV_QL2(__bid1, __bid2, __bv1, __bv2,           \
1736                 __eid1, __eid2, __ev1, __ev2)           \
1737         TPV_Q_X(PCI_VENDOR_ID_LENOVO, __bid1, __bid2,   \
1738                 __bv1, __bv2, TPID(__eid1, __eid2),     \
1739                 __ev1, __ev2)
1740
1741 static const struct tpacpi_quirk tpacpi_bios_version_qtable[] __initconst = {
1742         /*  Numeric models ------------------ */
1743         /*      FW MODEL   BIOS VERS          */
1744         TPV_QI0('I', 'M',  '6', '5'),            /* 570 */
1745         TPV_QI0('I', 'U',  '2', '6'),            /* 570E */
1746         TPV_QI0('I', 'B',  '5', '4'),            /* 600 */
1747         TPV_QI0('I', 'H',  '4', '7'),            /* 600E */
1748         TPV_QI0('I', 'N',  '3', '6'),            /* 600E */
1749         TPV_QI0('I', 'T',  '5', '5'),            /* 600X */
1750         TPV_QI0('I', 'D',  '4', '8'),            /* 770, 770E, 770ED */
1751         TPV_QI0('I', 'I',  '4', '2'),            /* 770X */
1752         TPV_QI0('I', 'O',  '2', '3'),            /* 770Z */
1753
1754         /* A-series ------------------------- */
1755         /*      FW MODEL   BIOS VERS  EC VERS */
1756         TPV_QI0('I', 'W',  '5', '9'),            /* A20m */
1757         TPV_QI0('I', 'V',  '6', '9'),            /* A20p */
1758         TPV_QI0('1', '0',  '2', '6'),            /* A21e, A22e */
1759         TPV_QI0('K', 'U',  '3', '6'),            /* A21e */
1760         TPV_QI0('K', 'X',  '3', '6'),            /* A21m, A22m */
1761         TPV_QI0('K', 'Y',  '3', '8'),            /* A21p, A22p */
1762         TPV_QI0('1', 'B',  '1', '7'),            /* A22e */
1763         TPV_QI0('1', '3',  '2', '0'),            /* A22m */
1764         TPV_QI0('1', 'E',  '7', '3'),            /* A30/p (0) */
1765         TPV_QI1('1', 'G',  '4', '1',  '1', '7'), /* A31/p (0) */
1766         TPV_QI1('1', 'N',  '1', '6',  '0', '7'), /* A31/p (0) */
1767
1768         /* G-series ------------------------- */
1769         /*      FW MODEL   BIOS VERS          */
1770         TPV_QI0('1', 'T',  'A', '6'),            /* G40 */
1771         TPV_QI0('1', 'X',  '5', '7'),            /* G41 */
1772
1773         /* R-series, T-series --------------- */
1774         /*      FW MODEL   BIOS VERS  EC VERS */
1775         TPV_QI0('1', 'C',  'F', '0'),            /* R30 */
1776         TPV_QI0('1', 'F',  'F', '1'),            /* R31 */
1777         TPV_QI0('1', 'M',  '9', '7'),            /* R32 */
1778         TPV_QI0('1', 'O',  '6', '1'),            /* R40 */
1779         TPV_QI0('1', 'P',  '6', '5'),            /* R40 */
1780         TPV_QI0('1', 'S',  '7', '0'),            /* R40e */
1781         TPV_QI1('1', 'R',  'D', 'R',  '7', '1'), /* R50/p, R51,
1782                                                     T40/p, T41/p, T42/p (1) */
1783         TPV_QI1('1', 'V',  '7', '1',  '2', '8'), /* R50e, R51 (1) */
1784         TPV_QI1('7', '8',  '7', '1',  '0', '6'), /* R51e (1) */
1785         TPV_QI1('7', '6',  '6', '9',  '1', '6'), /* R52 (1) */
1786         TPV_QI1('7', '0',  '6', '9',  '2', '8'), /* R52, T43 (1) */
1787
1788         TPV_QI0('I', 'Y',  '6', '1'),            /* T20 */
1789         TPV_QI0('K', 'Z',  '3', '4'),            /* T21 */
1790         TPV_QI0('1', '6',  '3', '2'),            /* T22 */
1791         TPV_QI1('1', 'A',  '6', '4',  '2', '3'), /* T23 (0) */
1792         TPV_QI1('1', 'I',  '7', '1',  '2', '0'), /* T30 (0) */
1793         TPV_QI1('1', 'Y',  '6', '5',  '2', '9'), /* T43/p (1) */
1794
1795         TPV_QL1('7', '9',  'E', '3',  '5', '0'), /* T60/p */
1796         TPV_QL1('7', 'C',  'D', '2',  '2', '2'), /* R60, R60i */
1797         TPV_QL1('7', 'E',  'D', '0',  '1', '5'), /* R60e, R60i */
1798
1799         /*      BIOS FW    BIOS VERS  EC FW     EC VERS */
1800         TPV_QI2('1', 'W',  '9', '0',  '1', 'V', '2', '8'), /* R50e (1) */
1801         TPV_QL2('7', 'I',  '3', '4',  '7', '9', '5', '0'), /* T60/p wide */
1802
1803         /* X-series ------------------------- */
1804         /*      FW MODEL   BIOS VERS  EC VERS */
1805         TPV_QI0('I', 'Z',  '9', 'D'),            /* X20, X21 */
1806         TPV_QI0('1', 'D',  '7', '0'),            /* X22, X23, X24 */
1807         TPV_QI1('1', 'K',  '4', '8',  '1', '8'), /* X30 (0) */
1808         TPV_QI1('1', 'Q',  '9', '7',  '2', '3'), /* X31, X32 (0) */
1809         TPV_QI1('1', 'U',  'D', '3',  'B', '2'), /* X40 (0) */
1810         TPV_QI1('7', '4',  '6', '4',  '2', '7'), /* X41 (0) */
1811         TPV_QI1('7', '5',  '6', '0',  '2', '0'), /* X41t (0) */
1812
1813         TPV_QL1('7', 'B',  'D', '7',  '4', '0'), /* X60/s */
1814         TPV_QL1('7', 'J',  '3', '0',  '1', '3'), /* X60t */
1815
1816         /* (0) - older versions lack DMI EC fw string and functionality */
1817         /* (1) - older versions known to lack functionality */
1818 };
1819
1820 #undef TPV_QL1
1821 #undef TPV_QL0
1822 #undef TPV_QI2
1823 #undef TPV_QI1
1824 #undef TPV_QI0
1825 #undef TPV_Q_X
1826 #undef TPV_Q
1827
1828 static void __init tpacpi_check_outdated_fw(void)
1829 {
1830         unsigned long fwvers;
1831         u16 ec_version, bios_version;
1832
1833         fwvers = tpacpi_check_quirks(tpacpi_bios_version_qtable,
1834                                 ARRAY_SIZE(tpacpi_bios_version_qtable));
1835
1836         if (!fwvers)
1837                 return;
1838
1839         bios_version = fwvers & 0xffffU;
1840         ec_version = (fwvers >> 16) & 0xffffU;
1841
1842         /* note that unknown versions are set to 0x0000 and we use that */
1843         if ((bios_version > thinkpad_id.bios_release) ||
1844             (ec_version > thinkpad_id.ec_release &&
1845                                 ec_version != TPACPI_MATCH_ANY)) {
1846                 /*
1847                  * The changelogs would let us track down the exact
1848                  * reason, but it is just too much of a pain to track
1849                  * it.  We only list BIOSes that are either really
1850                  * broken, or really stable to begin with, so it is
1851                  * best if the user upgrades the firmware anyway.
1852                  */
1853                 printk(TPACPI_WARN
1854                         "WARNING: Outdated ThinkPad BIOS/EC firmware\n");
1855                 printk(TPACPI_WARN
1856                         "WARNING: This firmware may be missing critical bug "
1857                         "fixes and/or important features\n");
1858         }
1859 }
1860
1861 static bool __init tpacpi_is_fw_known(void)
1862 {
1863         return tpacpi_check_quirks(tpacpi_bios_version_qtable,
1864                         ARRAY_SIZE(tpacpi_bios_version_qtable)) != 0;
1865 }
1866
1867 /****************************************************************************
1868  ****************************************************************************
1869  *
1870  * Subdrivers
1871  *
1872  ****************************************************************************
1873  ****************************************************************************/
1874
1875 /*************************************************************************
1876  * thinkpad-acpi init subdriver
1877  */
1878
1879 static int __init thinkpad_acpi_driver_init(struct ibm_init_struct *iibm)
1880 {
1881         printk(TPACPI_INFO "%s v%s\n", TPACPI_DESC, TPACPI_VERSION);
1882         printk(TPACPI_INFO "%s\n", TPACPI_URL);
1883
1884         printk(TPACPI_INFO "ThinkPad BIOS %s, EC %s\n",
1885                 (thinkpad_id.bios_version_str) ?
1886                         thinkpad_id.bios_version_str : "unknown",
1887                 (thinkpad_id.ec_version_str) ?
1888                         thinkpad_id.ec_version_str : "unknown");
1889
1890         if (thinkpad_id.vendor && thinkpad_id.model_str)
1891                 printk(TPACPI_INFO "%s %s, model %s\n",
1892                         (thinkpad_id.vendor == PCI_VENDOR_ID_IBM) ?
1893                                 "IBM" : ((thinkpad_id.vendor ==
1894                                                 PCI_VENDOR_ID_LENOVO) ?
1895                                         "Lenovo" : "Unknown vendor"),
1896                         thinkpad_id.model_str,
1897                         (thinkpad_id.nummodel_str) ?
1898                                 thinkpad_id.nummodel_str : "unknown");
1899
1900         tpacpi_check_outdated_fw();
1901         return 0;
1902 }
1903
1904 static int thinkpad_acpi_driver_read(struct seq_file *m)
1905 {
1906         seq_printf(m, "driver:\t\t%s\n", TPACPI_DESC);
1907         seq_printf(m, "version:\t%s\n", TPACPI_VERSION);
1908         return 0;
1909 }
1910
1911 static struct ibm_struct thinkpad_acpi_driver_data = {
1912         .name = "driver",
1913         .read = thinkpad_acpi_driver_read,
1914 };
1915
1916 /*************************************************************************
1917  * Hotkey subdriver
1918  */
1919
1920 /*
1921  * ThinkPad firmware event model
1922  *
1923  * The ThinkPad firmware has two main event interfaces: normal ACPI
1924  * notifications (which follow the ACPI standard), and a private event
1925  * interface.
1926  *
1927  * The private event interface also issues events for the hotkeys.  As
1928  * the driver gained features, the event handling code ended up being
1929  * built around the hotkey subdriver.  This will need to be refactored
1930  * to a more formal event API eventually.
1931  *
1932  * Some "hotkeys" are actually supposed to be used as event reports,
1933  * such as "brightness has changed", "volume has changed", depending on
1934  * the ThinkPad model and how the firmware is operating.
1935  *
1936  * Unlike other classes, hotkey-class events have mask/unmask control on
1937  * non-ancient firmware.  However, how it behaves changes a lot with the
1938  * firmware model and version.
1939  */
1940
1941 enum {  /* hot key scan codes (derived from ACPI DSDT) */
1942         TP_ACPI_HOTKEYSCAN_FNF1         = 0,
1943         TP_ACPI_HOTKEYSCAN_FNF2,
1944         TP_ACPI_HOTKEYSCAN_FNF3,
1945         TP_ACPI_HOTKEYSCAN_FNF4,
1946         TP_ACPI_HOTKEYSCAN_FNF5,
1947         TP_ACPI_HOTKEYSCAN_FNF6,
1948         TP_ACPI_HOTKEYSCAN_FNF7,
1949         TP_ACPI_HOTKEYSCAN_FNF8,
1950         TP_ACPI_HOTKEYSCAN_FNF9,
1951         TP_ACPI_HOTKEYSCAN_FNF10,
1952         TP_ACPI_HOTKEYSCAN_FNF11,
1953         TP_ACPI_HOTKEYSCAN_FNF12,
1954         TP_ACPI_HOTKEYSCAN_FNBACKSPACE,
1955         TP_ACPI_HOTKEYSCAN_FNINSERT,
1956         TP_ACPI_HOTKEYSCAN_FNDELETE,
1957         TP_ACPI_HOTKEYSCAN_FNHOME,
1958         TP_ACPI_HOTKEYSCAN_FNEND,
1959         TP_ACPI_HOTKEYSCAN_FNPAGEUP,
1960         TP_ACPI_HOTKEYSCAN_FNPAGEDOWN,
1961         TP_ACPI_HOTKEYSCAN_FNSPACE,
1962         TP_ACPI_HOTKEYSCAN_VOLUMEUP,
1963         TP_ACPI_HOTKEYSCAN_VOLUMEDOWN,
1964         TP_ACPI_HOTKEYSCAN_MUTE,
1965         TP_ACPI_HOTKEYSCAN_THINKPAD,
1966 };
1967
1968 enum {  /* Keys/events available through NVRAM polling */
1969         TPACPI_HKEY_NVRAM_KNOWN_MASK = 0x00fb88c0U,
1970         TPACPI_HKEY_NVRAM_GOOD_MASK  = 0x00fb8000U,
1971 };
1972
1973 enum {  /* Positions of some of the keys in hotkey masks */
1974         TP_ACPI_HKEY_DISPSWTCH_MASK     = 1 << TP_ACPI_HOTKEYSCAN_FNF7,
1975         TP_ACPI_HKEY_DISPXPAND_MASK     = 1 << TP_ACPI_HOTKEYSCAN_FNF8,
1976         TP_ACPI_HKEY_HIBERNATE_MASK     = 1 << TP_ACPI_HOTKEYSCAN_FNF12,
1977         TP_ACPI_HKEY_BRGHTUP_MASK       = 1 << TP_ACPI_HOTKEYSCAN_FNHOME,
1978         TP_ACPI_HKEY_BRGHTDWN_MASK      = 1 << TP_ACPI_HOTKEYSCAN_FNEND,
1979         TP_ACPI_HKEY_THNKLGHT_MASK      = 1 << TP_ACPI_HOTKEYSCAN_FNPAGEUP,
1980         TP_ACPI_HKEY_ZOOM_MASK          = 1 << TP_ACPI_HOTKEYSCAN_FNSPACE,
1981         TP_ACPI_HKEY_VOLUP_MASK         = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEUP,
1982         TP_ACPI_HKEY_VOLDWN_MASK        = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEDOWN,
1983         TP_ACPI_HKEY_MUTE_MASK          = 1 << TP_ACPI_HOTKEYSCAN_MUTE,
1984         TP_ACPI_HKEY_THINKPAD_MASK      = 1 << TP_ACPI_HOTKEYSCAN_THINKPAD,
1985 };
1986
1987 enum {  /* NVRAM to ACPI HKEY group map */
1988         TP_NVRAM_HKEY_GROUP_HK2         = TP_ACPI_HKEY_THINKPAD_MASK |
1989                                           TP_ACPI_HKEY_ZOOM_MASK |
1990                                           TP_ACPI_HKEY_DISPSWTCH_MASK |
1991                                           TP_ACPI_HKEY_HIBERNATE_MASK,
1992         TP_NVRAM_HKEY_GROUP_BRIGHTNESS  = TP_ACPI_HKEY_BRGHTUP_MASK |
1993                                           TP_ACPI_HKEY_BRGHTDWN_MASK,
1994         TP_NVRAM_HKEY_GROUP_VOLUME      = TP_ACPI_HKEY_VOLUP_MASK |
1995                                           TP_ACPI_HKEY_VOLDWN_MASK |
1996                                           TP_ACPI_HKEY_MUTE_MASK,
1997 };
1998
1999 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2000 struct tp_nvram_state {
2001        u16 thinkpad_toggle:1;
2002        u16 zoom_toggle:1;
2003        u16 display_toggle:1;
2004        u16 thinklight_toggle:1;
2005        u16 hibernate_toggle:1;
2006        u16 displayexp_toggle:1;
2007        u16 display_state:1;
2008        u16 brightness_toggle:1;
2009        u16 volume_toggle:1;
2010        u16 mute:1;
2011
2012        u8 brightness_level;
2013        u8 volume_level;
2014 };
2015
2016 /* kthread for the hotkey poller */
2017 static struct task_struct *tpacpi_hotkey_task;
2018
2019 /* Acquired while the poller kthread is running, use to sync start/stop */
2020 static struct mutex hotkey_thread_mutex;
2021
2022 /*
2023  * Acquire mutex to write poller control variables as an
2024  * atomic block.
2025  *
2026  * Increment hotkey_config_change when changing them if you
2027  * want the kthread to forget old state.
2028  *
2029  * See HOTKEY_CONFIG_CRITICAL_START/HOTKEY_CONFIG_CRITICAL_END
2030  */
2031 static struct mutex hotkey_thread_data_mutex;
2032 static unsigned int hotkey_config_change;
2033
2034 /*
2035  * hotkey poller control variables
2036  *
2037  * Must be atomic or readers will also need to acquire mutex
2038  *
2039  * HOTKEY_CONFIG_CRITICAL_START/HOTKEY_CONFIG_CRITICAL_END
2040  * should be used only when the changes need to be taken as
2041  * a block, OR when one needs to force the kthread to forget
2042  * old state.
2043  */
2044 static u32 hotkey_source_mask;          /* bit mask 0=ACPI,1=NVRAM */
2045 static unsigned int hotkey_poll_freq = 10; /* Hz */
2046
2047 #define HOTKEY_CONFIG_CRITICAL_START \
2048         do { \
2049                 mutex_lock(&hotkey_thread_data_mutex); \
2050                 hotkey_config_change++; \
2051         } while (0);
2052 #define HOTKEY_CONFIG_CRITICAL_END \
2053         mutex_unlock(&hotkey_thread_data_mutex);
2054
2055 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2056
2057 #define hotkey_source_mask 0U
2058 #define HOTKEY_CONFIG_CRITICAL_START
2059 #define HOTKEY_CONFIG_CRITICAL_END
2060
2061 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2062
2063 static struct mutex hotkey_mutex;
2064
2065 static enum {   /* Reasons for waking up */
2066         TP_ACPI_WAKEUP_NONE = 0,        /* None or unknown */
2067         TP_ACPI_WAKEUP_BAYEJ,           /* Bay ejection request */
2068         TP_ACPI_WAKEUP_UNDOCK,          /* Undock request */
2069 } hotkey_wakeup_reason;
2070
2071 static int hotkey_autosleep_ack;
2072
2073 static u32 hotkey_orig_mask;            /* events the BIOS had enabled */
2074 static u32 hotkey_all_mask;             /* all events supported in fw */
2075 static u32 hotkey_reserved_mask;        /* events better left disabled */
2076 static u32 hotkey_driver_mask;          /* events needed by the driver */
2077 static u32 hotkey_user_mask;            /* events visible to userspace */
2078 static u32 hotkey_acpi_mask;            /* events enabled in firmware */
2079
2080 static unsigned int hotkey_report_mode;
2081
2082 static u16 *hotkey_keycode_map;
2083
2084 static struct attribute_set *hotkey_dev_attributes;
2085
2086 static void tpacpi_driver_event(const unsigned int hkey_event);
2087 static void hotkey_driver_event(const unsigned int scancode);
2088
2089 /* HKEY.MHKG() return bits */
2090 #define TP_HOTKEY_TABLET_MASK (1 << 3)
2091
2092 static int hotkey_get_wlsw(void)
2093 {
2094         int status;
2095
2096         if (!tp_features.hotkey_wlsw)
2097                 return -ENODEV;
2098
2099 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
2100         if (dbg_wlswemul)
2101                 return (tpacpi_wlsw_emulstate) ?
2102                                 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
2103 #endif
2104
2105         if (!acpi_evalf(hkey_handle, &status, "WLSW", "d"))
2106                 return -EIO;
2107
2108         return (status) ? TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
2109 }
2110
2111 static int hotkey_get_tablet_mode(int *status)
2112 {
2113         int s;
2114
2115         if (!acpi_evalf(hkey_handle, &s, "MHKG", "d"))
2116                 return -EIO;
2117
2118         *status = ((s & TP_HOTKEY_TABLET_MASK) != 0);
2119         return 0;
2120 }
2121
2122 /*
2123  * Reads current event mask from firmware, and updates
2124  * hotkey_acpi_mask accordingly.  Also resets any bits
2125  * from hotkey_user_mask that are unavailable to be
2126  * delivered (shadow requirement of the userspace ABI).
2127  *
2128  * Call with hotkey_mutex held
2129  */
2130 static int hotkey_mask_get(void)
2131 {
2132         if (tp_features.hotkey_mask) {
2133                 u32 m = 0;
2134
2135                 if (!acpi_evalf(hkey_handle, &m, "DHKN", "d"))
2136                         return -EIO;
2137
2138                 hotkey_acpi_mask = m;
2139         } else {
2140                 /* no mask support doesn't mean no event support... */
2141                 hotkey_acpi_mask = hotkey_all_mask;
2142         }
2143
2144         /* sync userspace-visible mask */
2145         hotkey_user_mask &= (hotkey_acpi_mask | hotkey_source_mask);
2146
2147         return 0;
2148 }
2149
2150 void static hotkey_mask_warn_incomplete_mask(void)
2151 {
2152         /* log only what the user can fix... */
2153         const u32 wantedmask = hotkey_driver_mask &
2154                 ~(hotkey_acpi_mask | hotkey_source_mask) &
2155                 (hotkey_all_mask | TPACPI_HKEY_NVRAM_KNOWN_MASK);
2156
2157         if (wantedmask)
2158                 printk(TPACPI_NOTICE
2159                         "required events 0x%08x not enabled!\n",
2160                         wantedmask);
2161 }
2162
2163 /*
2164  * Set the firmware mask when supported
2165  *
2166  * Also calls hotkey_mask_get to update hotkey_acpi_mask.
2167  *
2168  * NOTE: does not set bits in hotkey_user_mask, but may reset them.
2169  *
2170  * Call with hotkey_mutex held
2171  */
2172 static int hotkey_mask_set(u32 mask)
2173 {
2174         int i;
2175         int rc = 0;
2176
2177         const u32 fwmask = mask & ~hotkey_source_mask;
2178
2179         if (tp_features.hotkey_mask) {
2180                 for (i = 0; i < 32; i++) {
2181                         if (!acpi_evalf(hkey_handle,
2182                                         NULL, "MHKM", "vdd", i + 1,
2183                                         !!(mask & (1 << i)))) {
2184                                 rc = -EIO;
2185                                 break;
2186                         }
2187                 }
2188         }
2189
2190         /*
2191          * We *must* make an inconditional call to hotkey_mask_get to
2192          * refresh hotkey_acpi_mask and update hotkey_user_mask
2193          *
2194          * Take the opportunity to also log when we cannot _enable_
2195          * a given event.
2196          */
2197         if (!hotkey_mask_get() && !rc && (fwmask & ~hotkey_acpi_mask)) {
2198                 printk(TPACPI_NOTICE
2199                        "asked for hotkey mask 0x%08x, but "
2200                        "firmware forced it to 0x%08x\n",
2201                        fwmask, hotkey_acpi_mask);
2202         }
2203
2204         if (tpacpi_lifecycle != TPACPI_LIFE_EXITING)
2205                 hotkey_mask_warn_incomplete_mask();
2206
2207         return rc;
2208 }
2209
2210 /*
2211  * Sets hotkey_user_mask and tries to set the firmware mask
2212  *
2213  * Call with hotkey_mutex held
2214  */
2215 static int hotkey_user_mask_set(const u32 mask)
2216 {
2217         int rc;
2218
2219         /* Give people a chance to notice they are doing something that
2220          * is bound to go boom on their users sooner or later */
2221         if (!tp_warned.hotkey_mask_ff &&
2222             (mask == 0xffff || mask == 0xffffff ||
2223              mask == 0xffffffff)) {
2224                 tp_warned.hotkey_mask_ff = 1;
2225                 printk(TPACPI_NOTICE
2226                        "setting the hotkey mask to 0x%08x is likely "
2227                        "not the best way to go about it\n", mask);
2228                 printk(TPACPI_NOTICE
2229                        "please consider using the driver defaults, "
2230                        "and refer to up-to-date thinkpad-acpi "
2231                        "documentation\n");
2232         }
2233
2234         /* Try to enable what the user asked for, plus whatever we need.
2235          * this syncs everything but won't enable bits in hotkey_user_mask */
2236         rc = hotkey_mask_set((mask | hotkey_driver_mask) & ~hotkey_source_mask);
2237
2238         /* Enable the available bits in hotkey_user_mask */
2239         hotkey_user_mask = mask & (hotkey_acpi_mask | hotkey_source_mask);
2240
2241         return rc;
2242 }
2243
2244 /*
2245  * Sets the driver hotkey mask.
2246  *
2247  * Can be called even if the hotkey subdriver is inactive
2248  */
2249 static int tpacpi_hotkey_driver_mask_set(const u32 mask)
2250 {
2251         int rc;
2252
2253         /* Do the right thing if hotkey_init has not been called yet */
2254         if (!tp_features.hotkey) {
2255                 hotkey_driver_mask = mask;
2256                 return 0;
2257         }
2258
2259         mutex_lock(&hotkey_mutex);
2260
2261         HOTKEY_CONFIG_CRITICAL_START
2262         hotkey_driver_mask = mask;
2263 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2264         hotkey_source_mask |= (mask & ~hotkey_all_mask);
2265 #endif
2266         HOTKEY_CONFIG_CRITICAL_END
2267
2268         rc = hotkey_mask_set((hotkey_acpi_mask | hotkey_driver_mask) &
2269                                                         ~hotkey_source_mask);
2270         mutex_unlock(&hotkey_mutex);
2271
2272         return rc;
2273 }
2274
2275 static int hotkey_status_get(int *status)
2276 {
2277         if (!acpi_evalf(hkey_handle, status, "DHKC", "d"))
2278                 return -EIO;
2279
2280         return 0;
2281 }
2282
2283 static int hotkey_status_set(bool enable)
2284 {
2285         if (!acpi_evalf(hkey_handle, NULL, "MHKC", "vd", enable ? 1 : 0))
2286                 return -EIO;
2287
2288         return 0;
2289 }
2290
2291 static void tpacpi_input_send_tabletsw(void)
2292 {
2293         int state;
2294
2295         if (tp_features.hotkey_tablet &&
2296             !hotkey_get_tablet_mode(&state)) {
2297                 mutex_lock(&tpacpi_inputdev_send_mutex);
2298
2299                 input_report_switch(tpacpi_inputdev,
2300                                     SW_TABLET_MODE, !!state);
2301                 input_sync(tpacpi_inputdev);
2302
2303                 mutex_unlock(&tpacpi_inputdev_send_mutex);
2304         }
2305 }
2306
2307 /* Do NOT call without validating scancode first */
2308 static void tpacpi_input_send_key(const unsigned int scancode)
2309 {
2310         const unsigned int keycode = hotkey_keycode_map[scancode];
2311
2312         if (keycode != KEY_RESERVED) {
2313                 mutex_lock(&tpacpi_inputdev_send_mutex);
2314
2315                 input_report_key(tpacpi_inputdev, keycode, 1);
2316                 if (keycode == KEY_UNKNOWN)
2317                         input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN,
2318                                     scancode);
2319                 input_sync(tpacpi_inputdev);
2320
2321                 input_report_key(tpacpi_inputdev, keycode, 0);
2322                 if (keycode == KEY_UNKNOWN)
2323                         input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN,
2324                                     scancode);
2325                 input_sync(tpacpi_inputdev);
2326
2327                 mutex_unlock(&tpacpi_inputdev_send_mutex);
2328         }
2329 }
2330
2331 /* Do NOT call without validating scancode first */
2332 static void tpacpi_input_send_key_masked(const unsigned int scancode)
2333 {
2334         hotkey_driver_event(scancode);
2335         if (hotkey_user_mask & (1 << scancode))
2336                 tpacpi_input_send_key(scancode);
2337 }
2338
2339 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2340 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver;
2341
2342 /* Do NOT call without validating scancode first */
2343 static void tpacpi_hotkey_send_key(unsigned int scancode)
2344 {
2345         tpacpi_input_send_key_masked(scancode);
2346         if (hotkey_report_mode < 2) {
2347                 acpi_bus_generate_proc_event(ibm_hotkey_acpidriver.device,
2348                                 0x80, TP_HKEY_EV_HOTKEY_BASE + scancode);
2349         }
2350 }
2351
2352 static void hotkey_read_nvram(struct tp_nvram_state *n, const u32 m)
2353 {
2354         u8 d;
2355
2356         if (m & TP_NVRAM_HKEY_GROUP_HK2) {
2357                 d = nvram_read_byte(TP_NVRAM_ADDR_HK2);
2358                 n->thinkpad_toggle = !!(d & TP_NVRAM_MASK_HKT_THINKPAD);
2359                 n->zoom_toggle = !!(d & TP_NVRAM_MASK_HKT_ZOOM);
2360                 n->display_toggle = !!(d & TP_NVRAM_MASK_HKT_DISPLAY);
2361                 n->hibernate_toggle = !!(d & TP_NVRAM_MASK_HKT_HIBERNATE);
2362         }
2363         if (m & TP_ACPI_HKEY_THNKLGHT_MASK) {
2364                 d = nvram_read_byte(TP_NVRAM_ADDR_THINKLIGHT);
2365                 n->thinklight_toggle = !!(d & TP_NVRAM_MASK_THINKLIGHT);
2366         }
2367         if (m & TP_ACPI_HKEY_DISPXPAND_MASK) {
2368                 d = nvram_read_byte(TP_NVRAM_ADDR_VIDEO);
2369                 n->displayexp_toggle =
2370                                 !!(d & TP_NVRAM_MASK_HKT_DISPEXPND);
2371         }
2372         if (m & TP_NVRAM_HKEY_GROUP_BRIGHTNESS) {
2373                 d = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS);
2374                 n->brightness_level = (d & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
2375                                 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
2376                 n->brightness_toggle =
2377                                 !!(d & TP_NVRAM_MASK_HKT_BRIGHTNESS);
2378         }
2379         if (m & TP_NVRAM_HKEY_GROUP_VOLUME) {
2380                 d = nvram_read_byte(TP_NVRAM_ADDR_MIXER);
2381                 n->volume_level = (d & TP_NVRAM_MASK_LEVEL_VOLUME)
2382                                 >> TP_NVRAM_POS_LEVEL_VOLUME;
2383                 n->mute = !!(d & TP_NVRAM_MASK_MUTE);
2384                 n->volume_toggle = !!(d & TP_NVRAM_MASK_HKT_VOLUME);
2385         }
2386 }
2387
2388 static void hotkey_compare_and_issue_event(struct tp_nvram_state *oldn,
2389                                            struct tp_nvram_state *newn,
2390                                            const u32 event_mask)
2391 {
2392
2393 #define TPACPI_COMPARE_KEY(__scancode, __member) \
2394         do { \
2395                 if ((event_mask & (1 << __scancode)) && \
2396                     oldn->__member != newn->__member) \
2397                         tpacpi_hotkey_send_key(__scancode); \
2398         } while (0)
2399
2400 #define TPACPI_MAY_SEND_KEY(__scancode) \
2401         do { \
2402                 if (event_mask & (1 << __scancode)) \
2403                         tpacpi_hotkey_send_key(__scancode); \
2404         } while (0)
2405
2406         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_THINKPAD, thinkpad_toggle);
2407         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNSPACE, zoom_toggle);
2408         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF7, display_toggle);
2409         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF12, hibernate_toggle);
2410
2411         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNPAGEUP, thinklight_toggle);
2412
2413         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF8, displayexp_toggle);
2414
2415         /* handle volume */
2416         if (oldn->volume_toggle != newn->volume_toggle) {
2417                 if (oldn->mute != newn->mute) {
2418                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE);
2419                 }
2420                 if (oldn->volume_level > newn->volume_level) {
2421                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
2422                 } else if (oldn->volume_level < newn->volume_level) {
2423                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
2424                 } else if (oldn->mute == newn->mute) {
2425                         /* repeated key presses that didn't change state */
2426                         if (newn->mute) {
2427                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE);
2428                         } else if (newn->volume_level != 0) {
2429                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
2430                         } else {
2431                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
2432                         }
2433                 }
2434         }
2435
2436         /* handle brightness */
2437         if (oldn->brightness_toggle != newn->brightness_toggle) {
2438                 if (oldn->brightness_level < newn->brightness_level) {
2439                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
2440                 } else if (oldn->brightness_level > newn->brightness_level) {
2441                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
2442                 } else {
2443                         /* repeated key presses that didn't change state */
2444                         if (newn->brightness_level != 0) {
2445                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
2446                         } else {
2447                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
2448                         }
2449                 }
2450         }
2451
2452 #undef TPACPI_COMPARE_KEY
2453 #undef TPACPI_MAY_SEND_KEY
2454 }
2455
2456 /*
2457  * Polling driver
2458  *
2459  * We track all events in hotkey_source_mask all the time, since
2460  * most of them are edge-based.  We only issue those requested by
2461  * hotkey_user_mask or hotkey_driver_mask, though.
2462  */
2463 static int hotkey_kthread(void *data)
2464 {
2465         struct tp_nvram_state s[2];
2466         u32 poll_mask, event_mask;
2467         unsigned int si, so;
2468         unsigned long t;
2469         unsigned int change_detector, must_reset;
2470         unsigned int poll_freq;
2471
2472         mutex_lock(&hotkey_thread_mutex);
2473
2474         if (tpacpi_lifecycle == TPACPI_LIFE_EXITING)
2475                 goto exit;
2476
2477         set_freezable();
2478
2479         so = 0;
2480         si = 1;
2481         t = 0;
2482
2483         /* Initial state for compares */
2484         mutex_lock(&hotkey_thread_data_mutex);
2485         change_detector = hotkey_config_change;
2486         poll_mask = hotkey_source_mask;
2487         event_mask = hotkey_source_mask &
2488                         (hotkey_driver_mask | hotkey_user_mask);
2489         poll_freq = hotkey_poll_freq;
2490         mutex_unlock(&hotkey_thread_data_mutex);
2491         hotkey_read_nvram(&s[so], poll_mask);
2492
2493         while (!kthread_should_stop()) {
2494                 if (t == 0) {
2495                         if (likely(poll_freq))
2496                                 t = 1000/poll_freq;
2497                         else
2498                                 t = 100;        /* should never happen... */
2499                 }
2500                 t = msleep_interruptible(t);
2501                 if (unlikely(kthread_should_stop()))
2502                         break;
2503                 must_reset = try_to_freeze();
2504                 if (t > 0 && !must_reset)
2505                         continue;
2506
2507                 mutex_lock(&hotkey_thread_data_mutex);
2508                 if (must_reset || hotkey_config_change != change_detector) {
2509                         /* forget old state on thaw or config change */
2510                         si = so;
2511                         t = 0;
2512                         change_detector = hotkey_config_change;
2513                 }
2514                 poll_mask = hotkey_source_mask;
2515                 event_mask = hotkey_source_mask &
2516                                 (hotkey_driver_mask | hotkey_user_mask);
2517                 poll_freq = hotkey_poll_freq;
2518                 mutex_unlock(&hotkey_thread_data_mutex);
2519
2520                 if (likely(poll_mask)) {
2521                         hotkey_read_nvram(&s[si], poll_mask);
2522                         if (likely(si != so)) {
2523                                 hotkey_compare_and_issue_event(&s[so], &s[si],
2524                                                                 event_mask);
2525                         }
2526                 }
2527
2528                 so = si;
2529                 si ^= 1;
2530         }
2531
2532 exit:
2533         mutex_unlock(&hotkey_thread_mutex);
2534         return 0;
2535 }
2536
2537 /* call with hotkey_mutex held */
2538 static void hotkey_poll_stop_sync(void)
2539 {
2540         if (tpacpi_hotkey_task) {
2541                 if (frozen(tpacpi_hotkey_task) ||
2542                     freezing(tpacpi_hotkey_task))
2543                         thaw_process(tpacpi_hotkey_task);
2544
2545                 kthread_stop(tpacpi_hotkey_task);
2546                 tpacpi_hotkey_task = NULL;
2547                 mutex_lock(&hotkey_thread_mutex);
2548                 /* at this point, the thread did exit */
2549                 mutex_unlock(&hotkey_thread_mutex);
2550         }
2551 }
2552
2553 /* call with hotkey_mutex held */
2554 static void hotkey_poll_setup(bool may_warn)
2555 {
2556         const u32 poll_driver_mask = hotkey_driver_mask & hotkey_source_mask;
2557         const u32 poll_user_mask = hotkey_user_mask & hotkey_source_mask;
2558
2559         if (hotkey_poll_freq > 0 &&
2560             (poll_driver_mask ||
2561              (poll_user_mask && tpacpi_inputdev->users > 0))) {
2562                 if (!tpacpi_hotkey_task) {
2563                         tpacpi_hotkey_task = kthread_run(hotkey_kthread,
2564                                         NULL, TPACPI_NVRAM_KTHREAD_NAME);
2565                         if (IS_ERR(tpacpi_hotkey_task)) {
2566                                 tpacpi_hotkey_task = NULL;
2567                                 printk(TPACPI_ERR
2568                                        "could not create kernel thread "
2569                                        "for hotkey polling\n");
2570                         }
2571                 }
2572         } else {
2573                 hotkey_poll_stop_sync();
2574                 if (may_warn && (poll_driver_mask || poll_user_mask) &&
2575                     hotkey_poll_freq == 0) {
2576                         printk(TPACPI_NOTICE
2577                                 "hot keys 0x%08x and/or events 0x%08x "
2578                                 "require polling, which is currently "
2579                                 "disabled\n",
2580                                 poll_user_mask, poll_driver_mask);
2581                 }
2582         }
2583 }
2584
2585 static void hotkey_poll_setup_safe(bool may_warn)
2586 {
2587         mutex_lock(&hotkey_mutex);
2588         hotkey_poll_setup(may_warn);
2589         mutex_unlock(&hotkey_mutex);
2590 }
2591
2592 /* call with hotkey_mutex held */
2593 static void hotkey_poll_set_freq(unsigned int freq)
2594 {
2595         if (!freq)
2596                 hotkey_poll_stop_sync();
2597
2598         hotkey_poll_freq = freq;
2599 }
2600
2601 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2602
2603 static void hotkey_poll_setup_safe(bool __unused)
2604 {
2605 }
2606
2607 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2608
2609 static int hotkey_inputdev_open(struct input_dev *dev)
2610 {
2611         switch (tpacpi_lifecycle) {
2612         case TPACPI_LIFE_INIT:
2613                 /*
2614                  * hotkey_init will call hotkey_poll_setup_safe
2615                  * at the appropriate moment
2616                  */
2617                 return 0;
2618         case TPACPI_LIFE_EXITING:
2619                 return -EBUSY;
2620         case TPACPI_LIFE_RUNNING:
2621                 hotkey_poll_setup_safe(false);
2622                 return 0;
2623         }
2624
2625         /* Should only happen if tpacpi_lifecycle is corrupt */
2626         BUG();
2627         return -EBUSY;
2628 }
2629
2630 static void hotkey_inputdev_close(struct input_dev *dev)
2631 {
2632         /* disable hotkey polling when possible */
2633         if (tpacpi_lifecycle == TPACPI_LIFE_RUNNING &&
2634             !(hotkey_source_mask & hotkey_driver_mask))
2635                 hotkey_poll_setup_safe(false);
2636 }
2637
2638 /* sysfs hotkey enable ------------------------------------------------- */
2639 static ssize_t hotkey_enable_show(struct device *dev,
2640                            struct device_attribute *attr,
2641                            char *buf)
2642 {
2643         int res, status;
2644
2645         printk_deprecated_attribute("hotkey_enable",
2646                         "Hotkey reporting is always enabled");
2647
2648         res = hotkey_status_get(&status);
2649         if (res)
2650                 return res;
2651
2652         return snprintf(buf, PAGE_SIZE, "%d\n", status);
2653 }
2654
2655 static ssize_t hotkey_enable_store(struct device *dev,
2656                             struct device_attribute *attr,
2657                             const char *buf, size_t count)
2658 {
2659         unsigned long t;
2660
2661         printk_deprecated_attribute("hotkey_enable",
2662                         "Hotkeys can be disabled through hotkey_mask");
2663
2664         if (parse_strtoul(buf, 1, &t))
2665                 return -EINVAL;
2666
2667         if (t == 0)
2668                 return -EPERM;
2669
2670         return count;
2671 }
2672
2673 static struct device_attribute dev_attr_hotkey_enable =
2674         __ATTR(hotkey_enable, S_IWUSR | S_IRUGO,
2675                 hotkey_enable_show, hotkey_enable_store);
2676
2677 /* sysfs hotkey mask --------------------------------------------------- */
2678 static ssize_t hotkey_mask_show(struct device *dev,
2679                            struct device_attribute *attr,
2680                            char *buf)
2681 {
2682         return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_user_mask);
2683 }
2684
2685 static ssize_t hotkey_mask_store(struct device *dev,
2686                             struct device_attribute *attr,
2687                             const char *buf, size_t count)
2688 {
2689         unsigned long t;
2690         int res;
2691
2692         if (parse_strtoul(buf, 0xffffffffUL, &t))
2693                 return -EINVAL;
2694
2695         if (mutex_lock_killable(&hotkey_mutex))
2696                 return -ERESTARTSYS;
2697
2698         res = hotkey_user_mask_set(t);
2699
2700 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2701         hotkey_poll_setup(true);
2702 #endif
2703
2704         mutex_unlock(&hotkey_mutex);
2705
2706         tpacpi_disclose_usertask("hotkey_mask", "set to 0x%08lx\n", t);
2707
2708         return (res) ? res : count;
2709 }
2710
2711 static struct device_attribute dev_attr_hotkey_mask =
2712         __ATTR(hotkey_mask, S_IWUSR | S_IRUGO,
2713                 hotkey_mask_show, hotkey_mask_store);
2714
2715 /* sysfs hotkey bios_enabled ------------------------------------------- */
2716 static ssize_t hotkey_bios_enabled_show(struct device *dev,
2717                            struct device_attribute *attr,
2718                            char *buf)
2719 {
2720         return sprintf(buf, "0\n");
2721 }
2722
2723 static struct device_attribute dev_attr_hotkey_bios_enabled =
2724         __ATTR(hotkey_bios_enabled, S_IRUGO, hotkey_bios_enabled_show, NULL);
2725
2726 /* sysfs hotkey bios_mask ---------------------------------------------- */
2727 static ssize_t hotkey_bios_mask_show(struct device *dev,
2728                            struct device_attribute *attr,
2729                            char *buf)
2730 {
2731         printk_deprecated_attribute("hotkey_bios_mask",
2732                         "This attribute is useless.");
2733         return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_orig_mask);
2734 }
2735
2736 static struct device_attribute dev_attr_hotkey_bios_mask =
2737         __ATTR(hotkey_bios_mask, S_IRUGO, hotkey_bios_mask_show, NULL);
2738
2739 /* sysfs hotkey all_mask ----------------------------------------------- */
2740 static ssize_t hotkey_all_mask_show(struct device *dev,
2741                            struct device_attribute *attr,
2742                            char *buf)
2743 {
2744         return snprintf(buf, PAGE_SIZE, "0x%08x\n",
2745                                 hotkey_all_mask | hotkey_source_mask);
2746 }
2747
2748 static struct device_attribute dev_attr_hotkey_all_mask =
2749         __ATTR(hotkey_all_mask, S_IRUGO, hotkey_all_mask_show, NULL);
2750
2751 /* sysfs hotkey recommended_mask --------------------------------------- */
2752 static ssize_t hotkey_recommended_mask_show(struct device *dev,
2753                                             struct device_attribute *attr,
2754                                             char *buf)
2755 {
2756         return snprintf(buf, PAGE_SIZE, "0x%08x\n",
2757                         (hotkey_all_mask | hotkey_source_mask)
2758                         & ~hotkey_reserved_mask);
2759 }
2760
2761 static struct device_attribute dev_attr_hotkey_recommended_mask =
2762         __ATTR(hotkey_recommended_mask, S_IRUGO,
2763                 hotkey_recommended_mask_show, NULL);
2764
2765 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2766
2767 /* sysfs hotkey hotkey_source_mask ------------------------------------- */
2768 static ssize_t hotkey_source_mask_show(struct device *dev,
2769                            struct device_attribute *attr,
2770                            char *buf)
2771 {
2772         return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_source_mask);
2773 }
2774
2775 static ssize_t hotkey_source_mask_store(struct device *dev,
2776                             struct device_attribute *attr,
2777                             const char *buf, size_t count)
2778 {
2779         unsigned long t;
2780         u32 r_ev;
2781         int rc;
2782
2783         if (parse_strtoul(buf, 0xffffffffUL, &t) ||
2784                 ((t & ~TPACPI_HKEY_NVRAM_KNOWN_MASK) != 0))
2785                 return -EINVAL;
2786
2787         if (mutex_lock_killable(&hotkey_mutex))
2788                 return -ERESTARTSYS;
2789
2790         HOTKEY_CONFIG_CRITICAL_START
2791         hotkey_source_mask = t;
2792         HOTKEY_CONFIG_CRITICAL_END
2793
2794         rc = hotkey_mask_set((hotkey_user_mask | hotkey_driver_mask) &
2795                         ~hotkey_source_mask);
2796         hotkey_poll_setup(true);
2797
2798         /* check if events needed by the driver got disabled */
2799         r_ev = hotkey_driver_mask & ~(hotkey_acpi_mask & hotkey_all_mask)
2800                 & ~hotkey_source_mask & TPACPI_HKEY_NVRAM_KNOWN_MASK;
2801
2802         mutex_unlock(&hotkey_mutex);
2803
2804         if (rc < 0)
2805                 printk(TPACPI_ERR "hotkey_source_mask: failed to update the"
2806                         "firmware event mask!\n");
2807
2808         if (r_ev)
2809                 printk(TPACPI_NOTICE "hotkey_source_mask: "
2810                         "some important events were disabled: "
2811                         "0x%04x\n", r_ev);
2812
2813         tpacpi_disclose_usertask("hotkey_source_mask", "set to 0x%08lx\n", t);
2814
2815         return (rc < 0) ? rc : count;
2816 }
2817
2818 static struct device_attribute dev_attr_hotkey_source_mask =
2819         __ATTR(hotkey_source_mask, S_IWUSR | S_IRUGO,
2820                 hotkey_source_mask_show, hotkey_source_mask_store);
2821
2822 /* sysfs hotkey hotkey_poll_freq --------------------------------------- */
2823 static ssize_t hotkey_poll_freq_show(struct device *dev,
2824                            struct device_attribute *attr,
2825                            char *buf)
2826 {
2827         return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_poll_freq);
2828 }
2829
2830 static ssize_t hotkey_poll_freq_store(struct device *dev,
2831                             struct device_attribute *attr,
2832                             const char *buf, size_t count)
2833 {
2834         unsigned long t;
2835
2836         if (parse_strtoul(buf, 25, &t))
2837                 return -EINVAL;
2838
2839         if (mutex_lock_killable(&hotkey_mutex))
2840                 return -ERESTARTSYS;
2841
2842         hotkey_poll_set_freq(t);
2843         hotkey_poll_setup(true);
2844
2845         mutex_unlock(&hotkey_mutex);
2846
2847         tpacpi_disclose_usertask("hotkey_poll_freq", "set to %lu\n", t);
2848
2849         return count;
2850 }
2851
2852 static struct device_attribute dev_attr_hotkey_poll_freq =
2853         __ATTR(hotkey_poll_freq, S_IWUSR | S_IRUGO,
2854                 hotkey_poll_freq_show, hotkey_poll_freq_store);
2855
2856 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2857
2858 /* sysfs hotkey radio_sw (pollable) ------------------------------------ */
2859 static ssize_t hotkey_radio_sw_show(struct device *dev,
2860                            struct device_attribute *attr,
2861                            char *buf)
2862 {
2863         int res;
2864         res = hotkey_get_wlsw();
2865         if (res < 0)
2866                 return res;
2867
2868         /* Opportunistic update */
2869         tpacpi_rfk_update_hwblock_state((res == TPACPI_RFK_RADIO_OFF));
2870
2871         return snprintf(buf, PAGE_SIZE, "%d\n",
2872                         (res == TPACPI_RFK_RADIO_OFF) ? 0 : 1);
2873 }
2874
2875 static struct device_attribute dev_attr_hotkey_radio_sw =
2876         __ATTR(hotkey_radio_sw, S_IRUGO, hotkey_radio_sw_show, NULL);
2877
2878 static void hotkey_radio_sw_notify_change(void)
2879 {
2880         if (tp_features.hotkey_wlsw)
2881                 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2882                              "hotkey_radio_sw");
2883 }
2884
2885 /* sysfs hotkey tablet mode (pollable) --------------------------------- */
2886 static ssize_t hotkey_tablet_mode_show(struct device *dev,
2887                            struct device_attribute *attr,
2888                            char *buf)
2889 {
2890         int res, s;
2891         res = hotkey_get_tablet_mode(&s);
2892         if (res < 0)
2893                 return res;
2894
2895         return snprintf(buf, PAGE_SIZE, "%d\n", !!s);
2896 }
2897
2898 static struct device_attribute dev_attr_hotkey_tablet_mode =
2899         __ATTR(hotkey_tablet_mode, S_IRUGO, hotkey_tablet_mode_show, NULL);
2900
2901 static void hotkey_tablet_mode_notify_change(void)
2902 {
2903         if (tp_features.hotkey_tablet)
2904                 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2905                              "hotkey_tablet_mode");
2906 }
2907
2908 /* sysfs hotkey report_mode -------------------------------------------- */
2909 static ssize_t hotkey_report_mode_show(struct device *dev,
2910                            struct device_attribute *attr,
2911                            char *buf)
2912 {
2913         return snprintf(buf, PAGE_SIZE, "%d\n",
2914                 (hotkey_report_mode != 0) ? hotkey_report_mode : 1);
2915 }
2916
2917 static struct device_attribute dev_attr_hotkey_report_mode =
2918         __ATTR(hotkey_report_mode, S_IRUGO, hotkey_report_mode_show, NULL);
2919
2920 /* sysfs wakeup reason (pollable) -------------------------------------- */
2921 static ssize_t hotkey_wakeup_reason_show(struct device *dev,
2922                            struct device_attribute *attr,
2923                            char *buf)
2924 {
2925         return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_wakeup_reason);
2926 }
2927
2928 static struct device_attribute dev_attr_hotkey_wakeup_reason =
2929         __ATTR(wakeup_reason, S_IRUGO, hotkey_wakeup_reason_show, NULL);
2930
2931 static void hotkey_wakeup_reason_notify_change(void)
2932 {
2933         sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2934                      "wakeup_reason");
2935 }
2936
2937 /* sysfs wakeup hotunplug_complete (pollable) -------------------------- */
2938 static ssize_t hotkey_wakeup_hotunplug_complete_show(struct device *dev,
2939                            struct device_attribute *attr,
2940                            char *buf)
2941 {
2942         return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_autosleep_ack);
2943 }
2944
2945 static struct device_attribute dev_attr_hotkey_wakeup_hotunplug_complete =
2946         __ATTR(wakeup_hotunplug_complete, S_IRUGO,
2947                hotkey_wakeup_hotunplug_complete_show, NULL);
2948
2949 static void hotkey_wakeup_hotunplug_complete_notify_change(void)
2950 {
2951         sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2952                      "wakeup_hotunplug_complete");
2953 }
2954
2955 /* --------------------------------------------------------------------- */
2956
2957 static struct attribute *hotkey_attributes[] __initdata = {
2958         &dev_attr_hotkey_enable.attr,
2959         &dev_attr_hotkey_bios_enabled.attr,
2960         &dev_attr_hotkey_bios_mask.attr,
2961         &dev_attr_hotkey_report_mode.attr,
2962         &dev_attr_hotkey_wakeup_reason.attr,
2963         &dev_attr_hotkey_wakeup_hotunplug_complete.attr,
2964         &dev_attr_hotkey_mask.attr,
2965         &dev_attr_hotkey_all_mask.attr,
2966         &dev_attr_hotkey_recommended_mask.attr,
2967 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2968         &dev_attr_hotkey_source_mask.attr,
2969         &dev_attr_hotkey_poll_freq.attr,
2970 #endif
2971 };
2972
2973 /*
2974  * Sync both the hw and sw blocking state of all switches
2975  */
2976 static void tpacpi_send_radiosw_update(void)
2977 {
2978         int wlsw;
2979
2980         /*
2981          * We must sync all rfkill controllers *before* issuing any
2982          * rfkill input events, or we will race the rfkill core input
2983          * handler.
2984          *
2985          * tpacpi_inputdev_send_mutex works as a syncronization point
2986          * for the above.
2987          *
2988          * We optimize to avoid numerous calls to hotkey_get_wlsw.
2989          */
2990
2991         wlsw = hotkey_get_wlsw();
2992
2993         /* Sync hw blocking state first if it is hw-blocked */
2994         if (wlsw == TPACPI_RFK_RADIO_OFF)
2995                 tpacpi_rfk_update_hwblock_state(true);
2996
2997         /* Sync sw blocking state */
2998         tpacpi_rfk_update_swstate_all();
2999
3000         /* Sync hw blocking state last if it is hw-unblocked */
3001         if (wlsw == TPACPI_RFK_RADIO_ON)
3002                 tpacpi_rfk_update_hwblock_state(false);
3003
3004         /* Issue rfkill input event for WLSW switch */
3005         if (!(wlsw < 0)) {
3006                 mutex_lock(&tpacpi_inputdev_send_mutex);
3007
3008                 input_report_switch(tpacpi_inputdev,
3009                                     SW_RFKILL_ALL, (wlsw > 0));
3010                 input_sync(tpacpi_inputdev);
3011
3012                 mutex_unlock(&tpacpi_inputdev_send_mutex);
3013         }
3014
3015         /*
3016          * this can be unconditional, as we will poll state again
3017          * if userspace uses the notify to read data
3018          */
3019         hotkey_radio_sw_notify_change();
3020 }
3021
3022 static void hotkey_exit(void)
3023 {
3024 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
3025         mutex_lock(&hotkey_mutex);
3026         hotkey_poll_stop_sync();
3027         mutex_unlock(&hotkey_mutex);
3028 #endif
3029
3030         if (hotkey_dev_attributes)
3031                 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
3032
3033         kfree(hotkey_keycode_map);
3034
3035         dbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_HKEY,
3036                    "restoring original HKEY status and mask\n");
3037         /* yes, there is a bitwise or below, we want the
3038          * functions to be called even if one of them fail */
3039         if (((tp_features.hotkey_mask &&
3040               hotkey_mask_set(hotkey_orig_mask)) |
3041              hotkey_status_set(false)) != 0)
3042                 printk(TPACPI_ERR
3043                        "failed to restore hot key mask "
3044                        "to BIOS defaults\n");
3045 }
3046
3047 static void __init hotkey_unmap(const unsigned int scancode)
3048 {
3049         if (hotkey_keycode_map[scancode] != KEY_RESERVED) {
3050                 clear_bit(hotkey_keycode_map[scancode],
3051                           tpacpi_inputdev->keybit);
3052                 hotkey_keycode_map[scancode] = KEY_RESERVED;
3053         }
3054 }
3055
3056 /*
3057  * HKEY quirks:
3058  *   TPACPI_HK_Q_INIMASK:       Supports FN+F3,FN+F4,FN+F12
3059  */
3060
3061 #define TPACPI_HK_Q_INIMASK     0x0001
3062
3063 static const struct tpacpi_quirk tpacpi_hotkey_qtable[] __initconst = {
3064         TPACPI_Q_IBM('I', 'H', TPACPI_HK_Q_INIMASK), /* 600E */
3065         TPACPI_Q_IBM('I', 'N', TPACPI_HK_Q_INIMASK), /* 600E */
3066         TPACPI_Q_IBM('I', 'D', TPACPI_HK_Q_INIMASK), /* 770, 770E, 770ED */
3067         TPACPI_Q_IBM('I', 'W', TPACPI_HK_Q_INIMASK), /* A20m */
3068         TPACPI_Q_IBM('I', 'V', TPACPI_HK_Q_INIMASK), /* A20p */
3069         TPACPI_Q_IBM('1', '0', TPACPI_HK_Q_INIMASK), /* A21e, A22e */
3070         TPACPI_Q_IBM('K', 'U', TPACPI_HK_Q_INIMASK), /* A21e */
3071         TPACPI_Q_IBM('K', 'X', TPACPI_HK_Q_INIMASK), /* A21m, A22m */
3072         TPACPI_Q_IBM('K', 'Y', TPACPI_HK_Q_INIMASK), /* A21p, A22p */
3073         TPACPI_Q_IBM('1', 'B', TPACPI_HK_Q_INIMASK), /* A22e */
3074         TPACPI_Q_IBM('1', '3', TPACPI_HK_Q_INIMASK), /* A22m */
3075         TPACPI_Q_IBM('1', 'E', TPACPI_HK_Q_INIMASK), /* A30/p (0) */
3076         TPACPI_Q_IBM('1', 'C', TPACPI_HK_Q_INIMASK), /* R30 */
3077         TPACPI_Q_IBM('1', 'F', TPACPI_HK_Q_INIMASK), /* R31 */
3078         TPACPI_Q_IBM('I', 'Y', TPACPI_HK_Q_INIMASK), /* T20 */
3079         TPACPI_Q_IBM('K', 'Z', TPACPI_HK_Q_INIMASK), /* T21 */
3080         TPACPI_Q_IBM('1', '6', TPACPI_HK_Q_INIMASK), /* T22 */
3081         TPACPI_Q_IBM('I', 'Z', TPACPI_HK_Q_INIMASK), /* X20, X21 */
3082         TPACPI_Q_IBM('1', 'D', TPACPI_HK_Q_INIMASK), /* X22, X23, X24 */
3083 };
3084
3085 static int __init hotkey_init(struct ibm_init_struct *iibm)
3086 {
3087         /* Requirements for changing the default keymaps:
3088          *
3089          * 1. Many of the keys are mapped to KEY_RESERVED for very
3090          *    good reasons.  Do not change them unless you have deep
3091          *    knowledge on the IBM and Lenovo ThinkPad firmware for
3092          *    the various ThinkPad models.  The driver behaves
3093          *    differently for KEY_RESERVED: such keys have their
3094          *    hot key mask *unset* in mask_recommended, and also
3095          *    in the initial hot key mask programmed into the
3096          *    firmware at driver load time, which means the firm-
3097          *    ware may react very differently if you change them to
3098          *    something else;
3099          *
3100          * 2. You must be subscribed to the linux-thinkpad and
3101          *    ibm-acpi-devel mailing lists, and you should read the
3102          *    list archives since 2007 if you want to change the
3103          *    keymaps.  This requirement exists so that you will
3104          *    know the past history of problems with the thinkpad-
3105          *    acpi driver keymaps, and also that you will be
3106          *    listening to any bug reports;
3107          *
3108          * 3. Do not send thinkpad-acpi specific patches directly to
3109          *    for merging, *ever*.  Send them to the linux-acpi
3110          *    mailinglist for comments.  Merging is to be done only
3111          *    through acpi-test and the ACPI maintainer.
3112          *
3113          * If the above is too much to ask, don't change the keymap.
3114          * Ask the thinkpad-acpi maintainer to do it, instead.
3115          */
3116         static u16 ibm_keycode_map[] __initdata = {
3117                 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
3118                 KEY_FN_F1,      KEY_FN_F2,      KEY_COFFEE,     KEY_SLEEP,
3119                 KEY_WLAN,       KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
3120                 KEY_FN_F9,      KEY_FN_F10,     KEY_FN_F11,     KEY_SUSPEND,
3121
3122                 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
3123                 KEY_UNKNOWN,    /* 0x0C: FN+BACKSPACE */
3124                 KEY_UNKNOWN,    /* 0x0D: FN+INSERT */
3125                 KEY_UNKNOWN,    /* 0x0E: FN+DELETE */
3126
3127                 /* brightness: firmware always reacts to them */
3128                 KEY_RESERVED,   /* 0x0F: FN+HOME (brightness up) */
3129                 KEY_RESERVED,   /* 0x10: FN+END (brightness down) */
3130
3131                 /* Thinklight: firmware always react to it */
3132                 KEY_RESERVED,   /* 0x11: FN+PGUP (thinklight toggle) */
3133
3134                 KEY_UNKNOWN,    /* 0x12: FN+PGDOWN */
3135                 KEY_ZOOM,       /* 0x13: FN+SPACE (zoom) */
3136
3137                 /* Volume: firmware always react to it and reprograms
3138                  * the built-in *extra* mixer.  Never map it to control
3139                  * another mixer by default. */
3140                 KEY_RESERVED,   /* 0x14: VOLUME UP */
3141                 KEY_RESERVED,   /* 0x15: VOLUME DOWN */
3142                 KEY_RESERVED,   /* 0x16: MUTE */
3143
3144                 KEY_VENDOR,     /* 0x17: Thinkpad/AccessIBM/Lenovo */
3145
3146                 /* (assignments unknown, please report if found) */
3147                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3148                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3149         };
3150         static u16 lenovo_keycode_map[] __initdata = {
3151                 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
3152                 KEY_FN_F1,      KEY_COFFEE,     KEY_BATTERY,    KEY_SLEEP,
3153                 KEY_WLAN,       KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
3154                 KEY_FN_F9,      KEY_FN_F10,     KEY_FN_F11,     KEY_SUSPEND,
3155
3156                 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
3157                 KEY_UNKNOWN,    /* 0x0C: FN+BACKSPACE */
3158                 KEY_UNKNOWN,    /* 0x0D: FN+INSERT */
3159                 KEY_UNKNOWN,    /* 0x0E: FN+DELETE */
3160
3161                 /* These should be enabled --only-- when ACPI video
3162                  * is disabled (i.e. in "vendor" mode), and are handled
3163                  * in a special way by the init code */
3164                 KEY_BRIGHTNESSUP,       /* 0x0F: FN+HOME (brightness up) */
3165                 KEY_BRIGHTNESSDOWN,     /* 0x10: FN+END (brightness down) */
3166
3167                 KEY_RESERVED,   /* 0x11: FN+PGUP (thinklight toggle) */
3168
3169                 KEY_UNKNOWN,    /* 0x12: FN+PGDOWN */
3170                 KEY_ZOOM,       /* 0x13: FN+SPACE (zoom) */
3171
3172                 /* Volume: z60/z61, T60 (BIOS version?): firmware always
3173                  * react to it and reprograms the built-in *extra* mixer.
3174                  * Never map it to control another mixer by default.
3175                  *
3176                  * T60?, T61, R60?, R61: firmware and EC tries to send
3177                  * these over the regular keyboard, so these are no-ops,
3178                  * but there are still weird bugs re. MUTE, so do not
3179                  * change unless you get test reports from all Lenovo
3180                  * models.  May cause the BIOS to interfere with the
3181                  * HDA mixer.
3182                  */
3183                 KEY_RESERVED,   /* 0x14: VOLUME UP */
3184                 KEY_RESERVED,   /* 0x15: VOLUME DOWN */
3185                 KEY_RESERVED,   /* 0x16: MUTE */
3186
3187                 KEY_VENDOR,     /* 0x17: Thinkpad/AccessIBM/Lenovo */
3188
3189                 /* (assignments unknown, please report if found) */
3190                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3191                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3192         };
3193
3194 #define TPACPI_HOTKEY_MAP_LEN           ARRAY_SIZE(ibm_keycode_map)
3195 #define TPACPI_HOTKEY_MAP_SIZE          sizeof(ibm_keycode_map)
3196 #define TPACPI_HOTKEY_MAP_TYPESIZE      sizeof(ibm_keycode_map[0])
3197
3198         int res, i;
3199         int status;
3200         int hkeyv;
3201         bool radiosw_state  = false;
3202         bool tabletsw_state = false;
3203
3204         unsigned long quirks;
3205
3206         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3207                         "initializing hotkey subdriver\n");
3208
3209         BUG_ON(!tpacpi_inputdev);
3210         BUG_ON(tpacpi_inputdev->open != NULL ||
3211                tpacpi_inputdev->close != NULL);
3212
3213         TPACPI_ACPIHANDLE_INIT(hkey);
3214         mutex_init(&hotkey_mutex);
3215
3216 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
3217         mutex_init(&hotkey_thread_mutex);
3218         mutex_init(&hotkey_thread_data_mutex);
3219 #endif
3220
3221         /* hotkey not supported on 570 */
3222         tp_features.hotkey = hkey_handle != NULL;
3223
3224         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3225                 "hotkeys are %s\n",
3226                 str_supported(tp_features.hotkey));
3227
3228         if (!tp_features.hotkey)
3229                 return 1;
3230
3231         quirks = tpacpi_check_quirks(tpacpi_hotkey_qtable,
3232                                      ARRAY_SIZE(tpacpi_hotkey_qtable));
3233
3234         tpacpi_disable_brightness_delay();
3235
3236         /* MUST have enough space for all attributes to be added to
3237          * hotkey_dev_attributes */
3238         hotkey_dev_attributes = create_attr_set(
3239                                         ARRAY_SIZE(hotkey_attributes) + 2,
3240                                         NULL);
3241         if (!hotkey_dev_attributes)
3242                 return -ENOMEM;
3243         res = add_many_to_attr_set(hotkey_dev_attributes,
3244                         hotkey_attributes,
3245                         ARRAY_SIZE(hotkey_attributes));
3246         if (res)
3247                 goto err_exit;
3248
3249         /* mask not supported on 600e/x, 770e, 770x, A21e, A2xm/p,
3250            A30, R30, R31, T20-22, X20-21, X22-24.  Detected by checking
3251            for HKEY interface version 0x100 */
3252         if (acpi_evalf(hkey_handle, &hkeyv, "MHKV", "qd")) {
3253                 if ((hkeyv >> 8) != 1) {
3254                         printk(TPACPI_ERR "unknown version of the "
3255                                "HKEY interface: 0x%x\n", hkeyv);
3256                         printk(TPACPI_ERR "please report this to %s\n",
3257                                TPACPI_MAIL);
3258                 } else {
3259                         /*
3260                          * MHKV 0x100 in A31, R40, R40e,
3261                          * T4x, X31, and later
3262                          */
3263                         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3264                                 "firmware HKEY interface version: 0x%x\n",
3265                                 hkeyv);
3266
3267                         /* Paranoia check AND init hotkey_all_mask */
3268                         if (!acpi_evalf(hkey_handle, &hotkey_all_mask,
3269                                         "MHKA", "qd")) {
3270                                 printk(TPACPI_ERR
3271                                        "missing MHKA handler, "
3272                                        "please report this to %s\n",
3273                                        TPACPI_MAIL);
3274                                 /* Fallback: pre-init for FN+F3,F4,F12 */
3275                                 hotkey_all_mask = 0x080cU;
3276                         } else {
3277                                 tp_features.hotkey_mask = 1;
3278                         }
3279                 }
3280         }
3281
3282         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3283                 "hotkey masks are %s\n",
3284                 str_supported(tp_features.hotkey_mask));
3285
3286         /* Init hotkey_all_mask if not initialized yet */
3287         if (!tp_features.hotkey_mask && !hotkey_all_mask &&
3288             (quirks & TPACPI_HK_Q_INIMASK))
3289                 hotkey_all_mask = 0x080cU;  /* FN+F12, FN+F4, FN+F3 */
3290
3291         /* Init hotkey_acpi_mask and hotkey_orig_mask */
3292         if (tp_features.hotkey_mask) {
3293                 /* hotkey_source_mask *must* be zero for
3294                  * the first hotkey_mask_get to return hotkey_orig_mask */
3295                 res = hotkey_mask_get();
3296                 if (res)
3297                         goto err_exit;
3298
3299                 hotkey_orig_mask = hotkey_acpi_mask;
3300         } else {
3301                 hotkey_orig_mask = hotkey_all_mask;
3302                 hotkey_acpi_mask = hotkey_all_mask;
3303         }
3304
3305 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3306         if (dbg_wlswemul) {
3307                 tp_features.hotkey_wlsw = 1;
3308                 radiosw_state = !!tpacpi_wlsw_emulstate;
3309                 printk(TPACPI_INFO
3310                         "radio switch emulation enabled\n");
3311         } else
3312 #endif
3313         /* Not all thinkpads have a hardware radio switch */
3314         if (acpi_evalf(hkey_handle, &status, "WLSW", "qd")) {
3315                 tp_features.hotkey_wlsw = 1;
3316                 radiosw_state = !!status;
3317                 printk(TPACPI_INFO
3318                         "radio switch found; radios are %s\n",
3319                         enabled(status, 0));
3320         }
3321         if (tp_features.hotkey_wlsw)
3322                 res = add_to_attr_set(hotkey_dev_attributes,
3323                                 &dev_attr_hotkey_radio_sw.attr);
3324
3325         /* For X41t, X60t, X61t Tablets... */
3326         if (!res && acpi_evalf(hkey_handle, &status, "MHKG", "qd")) {
3327                 tp_features.hotkey_tablet = 1;
3328                 tabletsw_state = !!(status & TP_HOTKEY_TABLET_MASK);
3329                 printk(TPACPI_INFO
3330                         "possible tablet mode switch found; "
3331                         "ThinkPad in %s mode\n",
3332                         (tabletsw_state) ? "tablet" : "laptop");
3333                 res = add_to_attr_set(hotkey_dev_attributes,
3334                                 &dev_attr_hotkey_tablet_mode.attr);
3335         }
3336
3337         if (!res)
3338                 res = register_attr_set_with_sysfs(
3339                                 hotkey_dev_attributes,
3340                                 &tpacpi_pdev->dev.kobj);
3341         if (res)
3342                 goto err_exit;
3343
3344         /* Set up key map */
3345
3346         hotkey_keycode_map = kmalloc(TPACPI_HOTKEY_MAP_SIZE,
3347                                         GFP_KERNEL);
3348         if (!hotkey_keycode_map) {
3349                 printk(TPACPI_ERR
3350                         "failed to allocate memory for key map\n");
3351                 res = -ENOMEM;
3352                 goto err_exit;
3353         }
3354
3355         if (thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO) {
3356                 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3357                            "using Lenovo default hot key map\n");
3358                 memcpy(hotkey_keycode_map, &lenovo_keycode_map,
3359                         TPACPI_HOTKEY_MAP_SIZE);
3360         } else {
3361                 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3362                            "using IBM default hot key map\n");
3363                 memcpy(hotkey_keycode_map, &ibm_keycode_map,
3364                         TPACPI_HOTKEY_MAP_SIZE);
3365         }
3366
3367         input_set_capability(tpacpi_inputdev, EV_MSC, MSC_SCAN);
3368         tpacpi_inputdev->keycodesize = TPACPI_HOTKEY_MAP_TYPESIZE;
3369         tpacpi_inputdev->keycodemax = TPACPI_HOTKEY_MAP_LEN;
3370         tpacpi_inputdev->keycode = hotkey_keycode_map;
3371         for (i = 0; i < TPACPI_HOTKEY_MAP_LEN; i++) {
3372                 if (hotkey_keycode_map[i] != KEY_RESERVED) {
3373                         input_set_capability(tpacpi_inputdev, EV_KEY,
3374                                                 hotkey_keycode_map[i]);
3375                 } else {
3376                         if (i < sizeof(hotkey_reserved_mask)*8)
3377                                 hotkey_reserved_mask |= 1 << i;
3378                 }
3379         }
3380
3381         if (tp_features.hotkey_wlsw) {
3382                 input_set_capability(tpacpi_inputdev, EV_SW, SW_RFKILL_ALL);
3383                 input_report_switch(tpacpi_inputdev,
3384                                     SW_RFKILL_ALL, radiosw_state);
3385         }
3386         if (tp_features.hotkey_tablet) {
3387                 input_set_capability(tpacpi_inputdev, EV_SW, SW_TABLET_MODE);
3388                 input_report_switch(tpacpi_inputdev,
3389                                     SW_TABLET_MODE, tabletsw_state);
3390         }
3391
3392         /* Do not issue duplicate brightness change events to
3393          * userspace */
3394         if (!tp_features.bright_acpimode)
3395                 /* update bright_acpimode... */
3396                 tpacpi_check_std_acpi_brightness_support();
3397
3398         if (tp_features.bright_acpimode && acpi_video_backlight_support()) {
3399                 printk(TPACPI_INFO
3400                        "This ThinkPad has standard ACPI backlight "
3401                        "brightness control, supported by the ACPI "
3402                        "video driver\n");
3403                 printk(TPACPI_NOTICE
3404                        "Disabling thinkpad-acpi brightness events "
3405                        "by default...\n");
3406
3407                 /* Disable brightness up/down on Lenovo thinkpads when
3408                  * ACPI is handling them, otherwise it is plain impossible
3409                  * for userspace to do something even remotely sane */
3410                 hotkey_reserved_mask |=
3411                         (1 << TP_ACPI_HOTKEYSCAN_FNHOME)
3412                         | (1 << TP_ACPI_HOTKEYSCAN_FNEND);
3413                 hotkey_unmap(TP_ACPI_HOTKEYSCAN_FNHOME);
3414                 hotkey_unmap(TP_ACPI_HOTKEYSCAN_FNEND);
3415         }
3416
3417 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
3418         hotkey_source_mask = TPACPI_HKEY_NVRAM_GOOD_MASK
3419                                 & ~hotkey_all_mask
3420                                 & ~hotkey_reserved_mask;
3421
3422         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3423                     "hotkey source mask 0x%08x, polling freq %u\n",
3424                     hotkey_source_mask, hotkey_poll_freq);
3425 #endif
3426
3427         dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3428                         "enabling firmware HKEY event interface...\n");
3429         res = hotkey_status_set(true);
3430         if (res) {
3431                 hotkey_exit();
3432                 return res;
3433         }
3434         res = hotkey_mask_set(((hotkey_all_mask & ~hotkey_reserved_mask)
3435                                | hotkey_driver_mask)
3436                               & ~hotkey_source_mask);
3437         if (res < 0 && res != -ENXIO) {
3438                 hotkey_exit();
3439                 return res;
3440         }
3441         hotkey_user_mask = (hotkey_acpi_mask | hotkey_source_mask)
3442                                 & ~hotkey_reserved_mask;
3443         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3444                 "initial masks: user=0x%08x, fw=0x%08x, poll=0x%08x\n",
3445                 hotkey_user_mask, hotkey_acpi_mask, hotkey_source_mask);
3446
3447         dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3448                         "legacy ibm/hotkey event reporting over procfs %s\n",
3449                         (hotkey_report_mode < 2) ?
3450                                 "enabled" : "disabled");
3451
3452         tpacpi_inputdev->open = &hotkey_inputdev_open;
3453         tpacpi_inputdev->close = &hotkey_inputdev_close;
3454
3455         hotkey_poll_setup_safe(true);
3456
3457         return 0;
3458
3459 err_exit:
3460         delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
3461         hotkey_dev_attributes = NULL;
3462
3463         return (res < 0)? res : 1;
3464 }
3465
3466 static bool hotkey_notify_hotkey(const u32 hkey,
3467                                  bool *send_acpi_ev,
3468                                  bool *ignore_acpi_ev)
3469 {
3470         /* 0x1000-0x1FFF: key presses */
3471         unsigned int scancode = hkey & 0xfff;
3472         *send_acpi_ev = true;
3473         *ignore_acpi_ev = false;
3474
3475         if (scancode > 0 && scancode < 0x21) {
3476                 scancode--;
3477                 if (!(hotkey_source_mask & (1 << scancode))) {
3478                         tpacpi_input_send_key_masked(scancode);
3479                         *send_acpi_ev = false;
3480                 } else {
3481                         *ignore_acpi_ev = true;
3482                 }
3483                 return true;
3484         }
3485         return false;
3486 }
3487
3488 static bool hotkey_notify_wakeup(const u32 hkey,
3489                                  bool *send_acpi_ev,
3490                                  bool *ignore_acpi_ev)
3491 {
3492         /* 0x2000-0x2FFF: Wakeup reason */
3493         *send_acpi_ev = true;
3494         *ignore_acpi_ev = false;
3495
3496         switch (hkey) {
3497         case TP_HKEY_EV_WKUP_S3_UNDOCK: /* suspend, undock */
3498         case TP_HKEY_EV_WKUP_S4_UNDOCK: /* hibernation, undock */
3499                 hotkey_wakeup_reason = TP_ACPI_WAKEUP_UNDOCK;
3500                 *ignore_acpi_ev = true;
3501                 break;
3502
3503         case TP_HKEY_EV_WKUP_S3_BAYEJ: /* suspend, bay eject */
3504         case TP_HKEY_EV_WKUP_S4_BAYEJ: /* hibernation, bay eject */
3505                 hotkey_wakeup_reason = TP_ACPI_WAKEUP_BAYEJ;
3506                 *ignore_acpi_ev = true;
3507                 break;
3508
3509         case TP_HKEY_EV_WKUP_S3_BATLOW: /* Battery on critical low level/S3 */
3510         case TP_HKEY_EV_WKUP_S4_BATLOW: /* Battery on critical low level/S4 */
3511                 printk(TPACPI_ALERT
3512                         "EMERGENCY WAKEUP: battery almost empty\n");
3513                 /* how to auto-heal: */
3514                 /* 2313: woke up from S3, go to S4/S5 */
3515                 /* 2413: woke up from S4, go to S5 */
3516                 break;
3517
3518         default:
3519                 return false;
3520         }
3521
3522         if (hotkey_wakeup_reason != TP_ACPI_WAKEUP_NONE) {
3523                 printk(TPACPI_INFO
3524                        "woke up due to a hot-unplug "
3525                        "request...\n");
3526                 hotkey_wakeup_reason_notify_change();
3527         }
3528         return true;
3529 }
3530
3531 static bool hotkey_notify_usrevent(const u32 hkey,
3532                                  bool *send_acpi_ev,
3533                                  bool *ignore_acpi_ev)
3534 {
3535         /* 0x5000-0x5FFF: human interface helpers */
3536         *send_acpi_ev = true;
3537         *ignore_acpi_ev = false;
3538
3539         switch (hkey) {
3540         case TP_HKEY_EV_PEN_INSERTED:  /* X61t: tablet pen inserted into bay */
3541         case TP_HKEY_EV_PEN_REMOVED:   /* X61t: tablet pen removed from bay */
3542                 return true;
3543
3544         case TP_HKEY_EV_TABLET_TABLET:   /* X41t-X61t: tablet mode */
3545         case TP_HKEY_EV_TABLET_NOTEBOOK: /* X41t-X61t: normal mode */
3546                 tpacpi_input_send_tabletsw();
3547                 hotkey_tablet_mode_notify_change();
3548                 *send_acpi_ev = false;
3549                 return true;
3550
3551         case TP_HKEY_EV_LID_CLOSE:      /* Lid closed */
3552         case TP_HKEY_EV_LID_OPEN:       /* Lid opened */
3553         case TP_HKEY_EV_BRGHT_CHANGED:  /* brightness changed */
3554                 /* do not propagate these events */
3555                 *ignore_acpi_ev = true;
3556                 return true;
3557
3558         default:
3559                 return false;
3560         }
3561 }
3562
3563 static void thermal_dump_all_sensors(void);
3564
3565 static bool hotkey_notify_thermal(const u32 hkey,
3566                                  bool *send_acpi_ev,
3567                                  bool *ignore_acpi_ev)
3568 {
3569         bool known = true;
3570
3571         /* 0x6000-0x6FFF: thermal alarms */
3572         *send_acpi_ev = true;
3573         *ignore_acpi_ev = false;
3574
3575         switch (hkey) {
3576         case TP_HKEY_EV_THM_TABLE_CHANGED:
3577                 printk(TPACPI_INFO
3578                         "EC reports that Thermal Table has changed\n");
3579                 /* recommended action: do nothing, we don't have
3580                  * Lenovo ATM information */
3581                 return true;
3582         case TP_HKEY_EV_ALARM_BAT_HOT:
3583                 printk(TPACPI_CRIT
3584                         "THERMAL ALARM: battery is too hot!\n");
3585                 /* recommended action: warn user through gui */
3586                 break;
3587         case TP_HKEY_EV_ALARM_BAT_XHOT:
3588                 printk(TPACPI_ALERT
3589                         "THERMAL EMERGENCY: battery is extremely hot!\n");
3590                 /* recommended action: immediate sleep/hibernate */
3591                 break;
3592         case TP_HKEY_EV_ALARM_SENSOR_HOT:
3593                 printk(TPACPI_CRIT
3594                         "THERMAL ALARM: "
3595                         "a sensor reports something is too hot!\n");
3596                 /* recommended action: warn user through gui, that */
3597                 /* some internal component is too hot */
3598                 break;
3599         case TP_HKEY_EV_ALARM_SENSOR_XHOT:
3600                 printk(TPACPI_ALERT
3601                         "THERMAL EMERGENCY: "
3602                         "a sensor reports something is extremely hot!\n");
3603                 /* recommended action: immediate sleep/hibernate */
3604                 break;
3605         default:
3606                 printk(TPACPI_ALERT
3607                          "THERMAL ALERT: unknown thermal alarm received\n");
3608                 known = false;
3609         }
3610
3611         thermal_dump_all_sensors();
3612
3613         return known;
3614 }
3615
3616 static void hotkey_notify(struct ibm_struct *ibm, u32 event)
3617 {
3618         u32 hkey;
3619         bool send_acpi_ev;
3620         bool ignore_acpi_ev;
3621         bool known_ev;
3622
3623         if (event != 0x80) {
3624                 printk(TPACPI_ERR
3625                        "unknown HKEY notification event %d\n", event);
3626                 /* forward it to userspace, maybe it knows how to handle it */
3627                 acpi_bus_generate_netlink_event(
3628                                         ibm->acpi->device->pnp.device_class,
3629                                         dev_name(&ibm->acpi->device->dev),
3630                                         event, 0);
3631                 return;
3632         }
3633
3634         while (1) {
3635                 if (!acpi_evalf(hkey_handle, &hkey, "MHKP", "d")) {
3636                         printk(TPACPI_ERR "failed to retrieve HKEY event\n");
3637                         return;
3638                 }
3639
3640                 if (hkey == 0) {
3641                         /* queue empty */
3642                         return;
3643                 }
3644
3645                 send_acpi_ev = true;
3646                 ignore_acpi_ev = false;
3647
3648                 switch (hkey >> 12) {
3649                 case 1:
3650                         /* 0x1000-0x1FFF: key presses */
3651                         known_ev = hotkey_notify_hotkey(hkey, &send_acpi_ev,
3652                                                  &ignore_acpi_ev);
3653                         break;
3654                 case 2:
3655                         /* 0x2000-0x2FFF: Wakeup reason */
3656                         known_ev = hotkey_notify_wakeup(hkey, &send_acpi_ev,
3657                                                  &ignore_acpi_ev);
3658                         break;
3659                 case 3:
3660                         /* 0x3000-0x3FFF: bay-related wakeups */
3661                         if (hkey == TP_HKEY_EV_BAYEJ_ACK) {
3662                                 hotkey_autosleep_ack = 1;
3663                                 printk(TPACPI_INFO
3664                                        "bay ejected\n");
3665                                 hotkey_wakeup_hotunplug_complete_notify_change();
3666                                 known_ev = true;
3667                         } else {
3668                                 known_ev = false;
3669                         }
3670                         break;
3671                 case 4:
3672                         /* 0x4000-0x4FFF: dock-related wakeups */
3673                         if (hkey == TP_HKEY_EV_UNDOCK_ACK) {
3674                                 hotkey_autosleep_ack = 1;
3675                                 printk(TPACPI_INFO
3676                                        "undocked\n");
3677                                 hotkey_wakeup_hotunplug_complete_notify_change();
3678                                 known_ev = true;
3679                         } else {
3680                                 known_ev = false;
3681                         }
3682                         break;
3683                 case 5:
3684                         /* 0x5000-0x5FFF: human interface helpers */
3685                         known_ev = hotkey_notify_usrevent(hkey, &send_acpi_ev,
3686                                                  &ignore_acpi_ev);
3687                         break;
3688                 case 6:
3689                         /* 0x6000-0x6FFF: thermal alarms */
3690                         known_ev = hotkey_notify_thermal(hkey, &send_acpi_ev,
3691                                                  &ignore_acpi_ev);
3692                         break;
3693                 case 7:
3694                         /* 0x7000-0x7FFF: misc */
3695                         if (tp_features.hotkey_wlsw &&
3696                                         hkey == TP_HKEY_EV_RFKILL_CHANGED) {
3697                                 tpacpi_send_radiosw_update();
3698                                 send_acpi_ev = 0;
3699                                 known_ev = true;
3700                                 break;
3701                         }
3702                         /* fallthrough to default */
3703                 default:
3704                         known_ev = false;
3705                 }
3706                 if (!known_ev) {
3707                         printk(TPACPI_NOTICE
3708                                "unhandled HKEY event 0x%04x\n", hkey);
3709                         printk(TPACPI_NOTICE
3710                                "please report the conditions when this "
3711                                "event happened to %s\n", TPACPI_MAIL);
3712                 }
3713
3714                 /* Legacy events */
3715                 if (!ignore_acpi_ev &&
3716                     (send_acpi_ev || hotkey_report_mode < 2)) {
3717                         acpi_bus_generate_proc_event(ibm->acpi->device,
3718                                                      event, hkey);
3719                 }
3720
3721                 /* netlink events */
3722                 if (!ignore_acpi_ev && send_acpi_ev) {
3723                         acpi_bus_generate_netlink_event(
3724                                         ibm->acpi->device->pnp.device_class,
3725                                         dev_name(&ibm->acpi->device->dev),
3726                                         event, hkey);
3727                 }
3728         }
3729 }
3730
3731 static void hotkey_suspend(pm_message_t state)
3732 {
3733         /* Do these on suspend, we get the events on early resume! */
3734         hotkey_wakeup_reason = TP_ACPI_WAKEUP_NONE;
3735         hotkey_autosleep_ack = 0;
3736 }
3737
3738 static void hotkey_resume(void)
3739 {
3740         tpacpi_disable_brightness_delay();
3741
3742         if (hotkey_status_set(true) < 0 ||
3743             hotkey_mask_set(hotkey_acpi_mask) < 0)
3744                 printk(TPACPI_ERR
3745                        "error while attempting to reset the event "
3746                        "firmware interface\n");
3747
3748         tpacpi_send_radiosw_update();
3749         hotkey_tablet_mode_notify_change();
3750         hotkey_wakeup_reason_notify_change();
3751         hotkey_wakeup_hotunplug_complete_notify_change();
3752         hotkey_poll_setup_safe(false);
3753 }
3754
3755 /* procfs -------------------------------------------------------------- */
3756 static int hotkey_read(struct seq_file *m)
3757 {
3758         int res, status;
3759
3760         if (!tp_features.hotkey) {
3761                 seq_printf(m, "status:\t\tnot supported\n");
3762                 return 0;
3763         }
3764
3765         if (mutex_lock_killable(&hotkey_mutex))
3766                 return -ERESTARTSYS;
3767         res = hotkey_status_get(&status);
3768         if (!res)
3769                 res = hotkey_mask_get();
3770         mutex_unlock(&hotkey_mutex);
3771         if (res)
3772                 return res;
3773
3774         seq_printf(m, "status:\t\t%s\n", enabled(status, 0));
3775         if (hotkey_all_mask) {
3776                 seq_printf(m, "mask:\t\t0x%08x\n", hotkey_user_mask);
3777                 seq_printf(m, "commands:\tenable, disable, reset, <mask>\n");
3778         } else {
3779                 seq_printf(m, "mask:\t\tnot supported\n");
3780                 seq_printf(m, "commands:\tenable, disable, reset\n");
3781         }
3782
3783         return 0;
3784 }
3785
3786 static void hotkey_enabledisable_warn(bool enable)
3787 {
3788         tpacpi_log_usertask("procfs hotkey enable/disable");
3789         if (!WARN((tpacpi_lifecycle == TPACPI_LIFE_RUNNING || !enable),
3790                         TPACPI_WARN
3791                         "hotkey enable/disable functionality has been "
3792                         "removed from the driver.  Hotkeys are always "
3793                         "enabled\n"))
3794                 printk(TPACPI_ERR
3795                         "Please remove the hotkey=enable module "
3796                         "parameter, it is deprecated.  Hotkeys are always "
3797                         "enabled\n");
3798 }
3799
3800 static int hotkey_write(char *buf)
3801 {
3802         int res;
3803         u32 mask;
3804         char *cmd;
3805
3806         if (!tp_features.hotkey)
3807                 return -ENODEV;
3808
3809         if (mutex_lock_killable(&hotkey_mutex))
3810                 return -ERESTARTSYS;
3811
3812         mask = hotkey_user_mask;
3813
3814         res = 0;
3815         while ((cmd = next_cmd(&buf))) {
3816                 if (strlencmp(cmd, "enable") == 0) {
3817                         hotkey_enabledisable_warn(1);
3818                 } else if (strlencmp(cmd, "disable") == 0) {
3819                         hotkey_enabledisable_warn(0);
3820                         res = -EPERM;
3821                 } else if (strlencmp(cmd, "reset") == 0) {
3822                         mask = (hotkey_all_mask | hotkey_source_mask)
3823                                 & ~hotkey_reserved_mask;
3824                 } else if (sscanf(cmd, "0x%x", &mask) == 1) {
3825                         /* mask set */
3826                 } else if (sscanf(cmd, "%x", &mask) == 1) {
3827                         /* mask set */
3828                 } else {
3829                         res = -EINVAL;
3830                         goto errexit;
3831                 }
3832         }
3833
3834         if (!res) {
3835                 tpacpi_disclose_usertask("procfs hotkey",
3836                         "set mask to 0x%08x\n", mask);
3837                 res = hotkey_user_mask_set(mask);
3838         }
3839
3840 errexit:
3841         mutex_unlock(&hotkey_mutex);
3842         return res;
3843 }
3844
3845 static const struct acpi_device_id ibm_htk_device_ids[] = {
3846         {TPACPI_ACPI_HKEY_HID, 0},
3847         {"", 0},
3848 };
3849
3850 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver = {
3851         .hid = ibm_htk_device_ids,
3852         .notify = hotkey_notify,
3853         .handle = &hkey_handle,
3854         .type = ACPI_DEVICE_NOTIFY,
3855 };
3856
3857 static struct ibm_struct hotkey_driver_data = {
3858         .name = "hotkey",
3859         .read = hotkey_read,
3860         .write = hotkey_write,
3861         .exit = hotkey_exit,
3862         .resume = hotkey_resume,
3863         .suspend = hotkey_suspend,
3864         .acpi = &ibm_hotkey_acpidriver,
3865 };
3866
3867 /*************************************************************************
3868  * Bluetooth subdriver
3869  */
3870
3871 enum {
3872         /* ACPI GBDC/SBDC bits */
3873         TP_ACPI_BLUETOOTH_HWPRESENT     = 0x01, /* Bluetooth hw available */
3874         TP_ACPI_BLUETOOTH_RADIOSSW      = 0x02, /* Bluetooth radio enabled */
3875         TP_ACPI_BLUETOOTH_RESUMECTRL    = 0x04, /* Bluetooth state at resume:
3876                                                    off / last state */
3877 };
3878
3879 enum {
3880         /* ACPI \BLTH commands */
3881         TP_ACPI_BLTH_GET_ULTRAPORT_ID   = 0x00, /* Get Ultraport BT ID */
3882         TP_ACPI_BLTH_GET_PWR_ON_RESUME  = 0x01, /* Get power-on-resume state */
3883         TP_ACPI_BLTH_PWR_ON_ON_RESUME   = 0x02, /* Resume powered on */
3884         TP_ACPI_BLTH_PWR_OFF_ON_RESUME  = 0x03, /* Resume powered off */
3885         TP_ACPI_BLTH_SAVE_STATE         = 0x05, /* Save state for S4/S5 */
3886 };
3887
3888 #define TPACPI_RFK_BLUETOOTH_SW_NAME    "tpacpi_bluetooth_sw"
3889
3890 static int bluetooth_get_status(void)
3891 {
3892         int status;
3893
3894 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3895         if (dbg_bluetoothemul)
3896                 return (tpacpi_bluetooth_emulstate) ?
3897                        TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
3898 #endif
3899
3900         if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
3901                 return -EIO;
3902
3903         return ((status & TP_ACPI_BLUETOOTH_RADIOSSW) != 0) ?
3904                         TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
3905 }
3906
3907 static int bluetooth_set_status(enum tpacpi_rfkill_state state)
3908 {
3909         int status;
3910
3911         vdbg_printk(TPACPI_DBG_RFKILL,
3912                 "will attempt to %s bluetooth\n",
3913                 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable");
3914
3915 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3916         if (dbg_bluetoothemul) {
3917                 tpacpi_bluetooth_emulstate = (state == TPACPI_RFK_RADIO_ON);
3918                 return 0;
3919         }
3920 #endif
3921
3922         /* We make sure to keep TP_ACPI_BLUETOOTH_RESUMECTRL off */
3923         status = TP_ACPI_BLUETOOTH_RESUMECTRL;
3924         if (state == TPACPI_RFK_RADIO_ON)
3925                 status |= TP_ACPI_BLUETOOTH_RADIOSSW;
3926
3927         if (!acpi_evalf(hkey_handle, NULL, "SBDC", "vd", status))
3928                 return -EIO;
3929
3930         return 0;
3931 }
3932
3933 /* sysfs bluetooth enable ---------------------------------------------- */
3934 static ssize_t bluetooth_enable_show(struct device *dev,
3935                            struct device_attribute *attr,
3936                            char *buf)
3937 {
3938         return tpacpi_rfk_sysfs_enable_show(TPACPI_RFK_BLUETOOTH_SW_ID,
3939                         attr, buf);
3940 }
3941
3942 static ssize_t bluetooth_enable_store(struct device *dev,
3943                             struct device_attribute *attr,
3944                             const char *buf, size_t count)
3945 {
3946         return tpacpi_rfk_sysfs_enable_store(TPACPI_RFK_BLUETOOTH_SW_ID,
3947                                 attr, buf, count);
3948 }
3949
3950 static struct device_attribute dev_attr_bluetooth_enable =
3951         __ATTR(bluetooth_enable, S_IWUSR | S_IRUGO,
3952                 bluetooth_enable_show, bluetooth_enable_store);
3953
3954 /* --------------------------------------------------------------------- */
3955
3956 static struct attribute *bluetooth_attributes[] = {
3957         &dev_attr_bluetooth_enable.attr,
3958         NULL
3959 };
3960
3961 static const struct attribute_group bluetooth_attr_group = {
3962         .attrs = bluetooth_attributes,
3963 };
3964
3965 static const struct tpacpi_rfk_ops bluetooth_tprfk_ops = {
3966         .get_status = bluetooth_get_status,
3967         .set_status = bluetooth_set_status,
3968 };
3969
3970 static void bluetooth_shutdown(void)
3971 {
3972         /* Order firmware to save current state to NVRAM */
3973         if (!acpi_evalf(NULL, NULL, "\\BLTH", "vd",
3974                         TP_ACPI_BLTH_SAVE_STATE))
3975                 printk(TPACPI_NOTICE
3976                         "failed to save bluetooth state to NVRAM\n");
3977         else
3978                 vdbg_printk(TPACPI_DBG_RFKILL,
3979                         "bluestooth state saved to NVRAM\n");
3980 }
3981
3982 static void bluetooth_exit(void)
3983 {
3984         sysfs_remove_group(&tpacpi_pdev->dev.kobj,
3985                         &bluetooth_attr_group);
3986
3987         tpacpi_destroy_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID);
3988
3989         bluetooth_shutdown();
3990 }
3991
3992 static int __init bluetooth_init(struct ibm_init_struct *iibm)
3993 {
3994         int res;
3995         int status = 0;
3996
3997         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
3998                         "initializing bluetooth subdriver\n");
3999
4000         TPACPI_ACPIHANDLE_INIT(hkey);
4001
4002         /* bluetooth not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
4003            G4x, R30, R31, R40e, R50e, T20-22, X20-21 */
4004         tp_features.bluetooth = hkey_handle &&
4005             acpi_evalf(hkey_handle, &status, "GBDC", "qd");
4006
4007         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4008                 "bluetooth is %s, status 0x%02x\n",
4009                 str_supported(tp_features.bluetooth),
4010                 status);
4011
4012 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4013         if (dbg_bluetoothemul) {
4014                 tp_features.bluetooth = 1;
4015                 printk(TPACPI_INFO
4016                         "bluetooth switch emulation enabled\n");
4017         } else
4018 #endif
4019         if (tp_features.bluetooth &&
4020             !(status & TP_ACPI_BLUETOOTH_HWPRESENT)) {
4021                 /* no bluetooth hardware present in system */
4022                 tp_features.bluetooth = 0;
4023                 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4024                            "bluetooth hardware not installed\n");
4025         }
4026
4027         if (!tp_features.bluetooth)
4028                 return 1;
4029
4030         res = tpacpi_new_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID,
4031                                 &bluetooth_tprfk_ops,
4032                                 RFKILL_TYPE_BLUETOOTH,
4033                                 TPACPI_RFK_BLUETOOTH_SW_NAME,
4034                                 true);
4035         if (res)
4036                 return res;
4037
4038         res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
4039                                 &bluetooth_attr_group);
4040         if (res) {
4041                 tpacpi_destroy_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID);
4042                 return res;
4043         }
4044
4045         return 0;
4046 }
4047
4048 /* procfs -------------------------------------------------------------- */
4049 static int bluetooth_read(struct seq_file *m)
4050 {
4051         return tpacpi_rfk_procfs_read(TPACPI_RFK_BLUETOOTH_SW_ID, m);
4052 }
4053
4054 static int bluetooth_write(char *buf)
4055 {
4056         return tpacpi_rfk_procfs_write(TPACPI_RFK_BLUETOOTH_SW_ID, buf);
4057 }
4058
4059 static struct ibm_struct bluetooth_driver_data = {
4060         .name = "bluetooth",
4061         .read = bluetooth_read,
4062         .write = bluetooth_write,
4063         .exit = bluetooth_exit,
4064         .shutdown = bluetooth_shutdown,
4065 };
4066
4067 /*************************************************************************
4068  * Wan subdriver
4069  */
4070
4071 enum {
4072         /* ACPI GWAN/SWAN bits */
4073         TP_ACPI_WANCARD_HWPRESENT       = 0x01, /* Wan hw available */
4074         TP_ACPI_WANCARD_RADIOSSW        = 0x02, /* Wan radio enabled */
4075         TP_ACPI_WANCARD_RESUMECTRL      = 0x04, /* Wan state at resume:
4076                                                    off / last state */
4077 };
4078
4079 #define TPACPI_RFK_WWAN_SW_NAME         "tpacpi_wwan_sw"
4080
4081 static int wan_get_status(void)
4082 {
4083         int status;
4084
4085 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4086         if (dbg_wwanemul)
4087                 return (tpacpi_wwan_emulstate) ?
4088                        TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4089 #endif
4090
4091         if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
4092                 return -EIO;
4093
4094         return ((status & TP_ACPI_WANCARD_RADIOSSW) != 0) ?
4095                         TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4096 }
4097
4098 static int wan_set_status(enum tpacpi_rfkill_state state)
4099 {
4100         int status;
4101
4102         vdbg_printk(TPACPI_DBG_RFKILL,
4103                 "will attempt to %s wwan\n",
4104                 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable");
4105
4106 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4107         if (dbg_wwanemul) {
4108                 tpacpi_wwan_emulstate = (state == TPACPI_RFK_RADIO_ON);
4109                 return 0;
4110         }
4111 #endif
4112
4113         /* We make sure to set TP_ACPI_WANCARD_RESUMECTRL */
4114         status = TP_ACPI_WANCARD_RESUMECTRL;
4115         if (state == TPACPI_RFK_RADIO_ON)
4116                 status |= TP_ACPI_WANCARD_RADIOSSW;
4117
4118         if (!acpi_evalf(hkey_handle, NULL, "SWAN", "vd", status))
4119                 return -EIO;
4120
4121         return 0;
4122 }
4123
4124 /* sysfs wan enable ---------------------------------------------------- */
4125 static ssize_t wan_enable_show(struct device *dev,
4126                            struct device_attribute *attr,
4127                            char *buf)
4128 {
4129         return tpacpi_rfk_sysfs_enable_show(TPACPI_RFK_WWAN_SW_ID,
4130                         attr, buf);
4131 }
4132
4133 static ssize_t wan_enable_store(struct device *dev,
4134                             struct device_attribute *attr,
4135                             const char *buf, size_t count)
4136 {
4137         return tpacpi_rfk_sysfs_enable_store(TPACPI_RFK_WWAN_SW_ID,
4138                         attr, buf, count);
4139 }
4140
4141 static struct device_attribute dev_attr_wan_enable =
4142         __ATTR(wwan_enable, S_IWUSR | S_IRUGO,
4143                 wan_enable_show, wan_enable_store);
4144
4145 /* --------------------------------------------------------------------- */
4146
4147 static struct attribute *wan_attributes[] = {
4148         &dev_attr_wan_enable.attr,
4149         NULL
4150 };
4151
4152 static const struct attribute_group wan_attr_group = {
4153         .attrs = wan_attributes,
4154 };
4155
4156 static const struct tpacpi_rfk_ops wan_tprfk_ops = {
4157         .get_status = wan_get_status,
4158         .set_status = wan_set_status,
4159 };
4160
4161 static void wan_shutdown(void)
4162 {
4163         /* Order firmware to save current state to NVRAM */
4164         if (!acpi_evalf(NULL, NULL, "\\WGSV", "vd",
4165                         TP_ACPI_WGSV_SAVE_STATE))
4166                 printk(TPACPI_NOTICE
4167                         "failed to save WWAN state to NVRAM\n");
4168         else
4169                 vdbg_printk(TPACPI_DBG_RFKILL,
4170                         "WWAN state saved to NVRAM\n");
4171 }
4172
4173 static void wan_exit(void)
4174 {
4175         sysfs_remove_group(&tpacpi_pdev->dev.kobj,
4176                 &wan_attr_group);
4177
4178         tpacpi_destroy_rfkill(TPACPI_RFK_WWAN_SW_ID);
4179
4180         wan_shutdown();
4181 }
4182
4183 static int __init wan_init(struct ibm_init_struct *iibm)
4184 {
4185         int res;
4186         int status = 0;
4187
4188         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4189                         "initializing wan subdriver\n");
4190
4191         TPACPI_ACPIHANDLE_INIT(hkey);
4192
4193         tp_features.wan = hkey_handle &&
4194             acpi_evalf(hkey_handle, &status, "GWAN", "qd");
4195
4196         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4197                 "wan is %s, status 0x%02x\n",
4198                 str_supported(tp_features.wan),
4199                 status);
4200
4201 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4202         if (dbg_wwanemul) {
4203                 tp_features.wan = 1;
4204                 printk(TPACPI_INFO
4205                         "wwan switch emulation enabled\n");
4206         } else
4207 #endif
4208         if (tp_features.wan &&
4209             !(status & TP_ACPI_WANCARD_HWPRESENT)) {
4210                 /* no wan hardware present in system */
4211                 tp_features.wan = 0;
4212                 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4213                            "wan hardware not installed\n");
4214         }
4215
4216         if (!tp_features.wan)
4217                 return 1;
4218
4219         res = tpacpi_new_rfkill(TPACPI_RFK_WWAN_SW_ID,
4220                                 &wan_tprfk_ops,
4221                                 RFKILL_TYPE_WWAN,
4222                                 TPACPI_RFK_WWAN_SW_NAME,
4223                                 true);
4224         if (res)
4225                 return res;
4226
4227         res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
4228                                 &wan_attr_group);
4229
4230         if (res) {
4231                 tpacpi_destroy_rfkill(TPACPI_RFK_WWAN_SW_ID);
4232                 return res;
4233         }
4234
4235         return 0;
4236 }
4237
4238 /* procfs -------------------------------------------------------------- */
4239 static int wan_read(struct seq_file *m)
4240 {
4241         return tpacpi_rfk_procfs_read(TPACPI_RFK_WWAN_SW_ID, m);
4242 }
4243
4244 static int wan_write(char *buf)
4245 {
4246         return tpacpi_rfk_procfs_write(TPACPI_RFK_WWAN_SW_ID, buf);
4247 }
4248
4249 static struct ibm_struct wan_driver_data = {
4250         .name = "wan",
4251         .read = wan_read,
4252         .write = wan_write,
4253         .exit = wan_exit,
4254         .shutdown = wan_shutdown,
4255 };
4256
4257 /*************************************************************************
4258  * UWB subdriver
4259  */
4260
4261 enum {
4262         /* ACPI GUWB/SUWB bits */
4263         TP_ACPI_UWB_HWPRESENT   = 0x01, /* UWB hw available */
4264         TP_ACPI_UWB_RADIOSSW    = 0x02, /* UWB radio enabled */
4265 };
4266
4267 #define TPACPI_RFK_UWB_SW_NAME  "tpacpi_uwb_sw"
4268
4269 static int uwb_get_status(void)
4270 {
4271         int status;
4272
4273 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4274         if (dbg_uwbemul)
4275                 return (tpacpi_uwb_emulstate) ?
4276                        TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4277 #endif
4278
4279         if (!acpi_evalf(hkey_handle, &status, "GUWB", "d"))
4280                 return -EIO;
4281
4282         return ((status & TP_ACPI_UWB_RADIOSSW) != 0) ?
4283                         TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4284 }
4285
4286 static int uwb_set_status(enum tpacpi_rfkill_state state)
4287 {
4288         int status;
4289
4290         vdbg_printk(TPACPI_DBG_RFKILL,
4291                 "will attempt to %s UWB\n",
4292                 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable");
4293
4294 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4295         if (dbg_uwbemul) {
4296                 tpacpi_uwb_emulstate = (state == TPACPI_RFK_RADIO_ON);
4297                 return 0;
4298         }
4299 #endif
4300
4301         if (state == TPACPI_RFK_RADIO_ON)
4302                 status = TP_ACPI_UWB_RADIOSSW;
4303         else
4304                 status = 0;
4305
4306         if (!acpi_evalf(hkey_handle, NULL, "SUWB", "vd", status))
4307                 return -EIO;
4308
4309         return 0;
4310 }
4311
4312 /* --------------------------------------------------------------------- */
4313
4314 static const struct tpacpi_rfk_ops uwb_tprfk_ops = {
4315         .get_status = uwb_get_status,
4316         .set_status = uwb_set_status,
4317 };
4318
4319 static void uwb_exit(void)
4320 {
4321         tpacpi_destroy_rfkill(TPACPI_RFK_UWB_SW_ID);
4322 }
4323
4324 static int __init uwb_init(struct ibm_init_struct *iibm)
4325 {
4326         int res;
4327         int status = 0;
4328
4329         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4330                         "initializing uwb subdriver\n");
4331
4332         TPACPI_ACPIHANDLE_INIT(hkey);
4333
4334         tp_features.uwb = hkey_handle &&
4335             acpi_evalf(hkey_handle, &status, "GUWB", "qd");
4336
4337         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4338                 "uwb is %s, status 0x%02x\n",
4339                 str_supported(tp_features.uwb),
4340                 status);
4341
4342 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4343         if (dbg_uwbemul) {
4344                 tp_features.uwb = 1;
4345                 printk(TPACPI_INFO
4346                         "uwb switch emulation enabled\n");
4347         } else
4348 #endif
4349         if (tp_features.uwb &&
4350             !(status & TP_ACPI_UWB_HWPRESENT)) {
4351                 /* no uwb hardware present in system */
4352                 tp_features.uwb = 0;
4353                 dbg_printk(TPACPI_DBG_INIT,
4354                            "uwb hardware not installed\n");
4355         }
4356
4357         if (!tp_features.uwb)
4358                 return 1;
4359
4360         res = tpacpi_new_rfkill(TPACPI_RFK_UWB_SW_ID,
4361                                 &uwb_tprfk_ops,
4362                                 RFKILL_TYPE_UWB,
4363                                 TPACPI_RFK_UWB_SW_NAME,
4364                                 false);
4365         return res;
4366 }
4367
4368 static struct ibm_struct uwb_driver_data = {
4369         .name = "uwb",
4370         .exit = uwb_exit,
4371         .flags.experimental = 1,
4372 };
4373
4374 /*************************************************************************
4375  * Video subdriver
4376  */
4377
4378 #ifdef CONFIG_THINKPAD_ACPI_VIDEO
4379
4380 enum video_access_mode {
4381         TPACPI_VIDEO_NONE = 0,
4382         TPACPI_VIDEO_570,       /* 570 */
4383         TPACPI_VIDEO_770,       /* 600e/x, 770e, 770x */
4384         TPACPI_VIDEO_NEW,       /* all others */
4385 };
4386
4387 enum {  /* video status flags, based on VIDEO_570 */
4388         TP_ACPI_VIDEO_S_LCD = 0x01,     /* LCD output enabled */
4389         TP_ACPI_VIDEO_S_CRT = 0x02,     /* CRT output enabled */
4390         TP_ACPI_VIDEO_S_DVI = 0x08,     /* DVI output enabled */
4391 };
4392
4393 enum {  /* TPACPI_VIDEO_570 constants */
4394         TP_ACPI_VIDEO_570_PHSCMD = 0x87,        /* unknown magic constant :( */
4395         TP_ACPI_VIDEO_570_PHSMASK = 0x03,       /* PHS bits that map to
4396                                                  * video_status_flags */
4397         TP_ACPI_VIDEO_570_PHS2CMD = 0x8b,       /* unknown magic constant :( */
4398         TP_ACPI_VIDEO_570_PHS2SET = 0x80,       /* unknown magic constant :( */
4399 };
4400
4401 static enum video_access_mode video_supported;
4402 static int video_orig_autosw;
4403
4404 static int video_autosw_get(void);
4405 static int video_autosw_set(int enable);
4406
4407 TPACPI_HANDLE(vid2, root, "\\_SB.PCI0.AGPB.VID");       /* G41 */
4408
4409 static int __init video_init(struct ibm_init_struct *iibm)
4410 {
4411         int ivga;
4412
4413         vdbg_printk(TPACPI_DBG_INIT, "initializing video subdriver\n");
4414
4415         TPACPI_ACPIHANDLE_INIT(vid);
4416         TPACPI_ACPIHANDLE_INIT(vid2);
4417
4418         if (vid2_handle && acpi_evalf(NULL, &ivga, "\\IVGA", "d") && ivga)
4419                 /* G41, assume IVGA doesn't change */
4420                 vid_handle = vid2_handle;
4421
4422         if (!vid_handle)
4423                 /* video switching not supported on R30, R31 */
4424                 video_supported = TPACPI_VIDEO_NONE;
4425         else if (acpi_evalf(vid_handle, &video_orig_autosw, "SWIT", "qd"))
4426                 /* 570 */
4427                 video_supported = TPACPI_VIDEO_570;
4428         else if (acpi_evalf(vid_handle, &video_orig_autosw, "^VADL", "qd"))
4429                 /* 600e/x, 770e, 770x */
4430                 video_supported = TPACPI_VIDEO_770;
4431         else
4432                 /* all others */
4433                 video_supported = TPACPI_VIDEO_NEW;
4434
4435         vdbg_printk(TPACPI_DBG_INIT, "video is %s, mode %d\n",
4436                 str_supported(video_supported != TPACPI_VIDEO_NONE),
4437                 video_supported);
4438
4439         return (video_supported != TPACPI_VIDEO_NONE)? 0 : 1;
4440 }
4441
4442 static void video_exit(void)
4443 {
4444         dbg_printk(TPACPI_DBG_EXIT,
4445                    "restoring original video autoswitch mode\n");
4446         if (video_autosw_set(video_orig_autosw))
4447                 printk(TPACPI_ERR "error while trying to restore original "
4448                         "video autoswitch mode\n");
4449 }
4450
4451 static int video_outputsw_get(void)
4452 {
4453         int status = 0;
4454         int i;
4455
4456         switch (video_supported) {
4457         case TPACPI_VIDEO_570:
4458                 if (!acpi_evalf(NULL, &i, "\\_SB.PHS", "dd",
4459                                  TP_ACPI_VIDEO_570_PHSCMD))
4460                         return -EIO;
4461                 status = i & TP_ACPI_VIDEO_570_PHSMASK;
4462                 break;
4463         case TPACPI_VIDEO_770:
4464                 if (!acpi_evalf(NULL, &i, "\\VCDL", "d"))
4465                         return -EIO;
4466                 if (i)
4467                         status |= TP_ACPI_VIDEO_S_LCD;
4468                 if (!acpi_evalf(NULL, &i, "\\VCDC", "d"))
4469                         return -EIO;
4470                 if (i)
4471                         status |= TP_ACPI_VIDEO_S_CRT;
4472                 break;
4473         case TPACPI_VIDEO_NEW:
4474                 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 1) ||
4475                     !acpi_evalf(NULL, &i, "\\VCDC", "d"))
4476                         return -EIO;
4477                 if (i)
4478                         status |= TP_ACPI_VIDEO_S_CRT;
4479
4480                 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0) ||
4481                     !acpi_evalf(NULL, &i, "\\VCDL", "d"))
4482                         return -EIO;
4483                 if (i)
4484                         status |= TP_ACPI_VIDEO_S_LCD;
4485                 if (!acpi_evalf(NULL, &i, "\\VCDD", "d"))
4486                         return -EIO;
4487                 if (i)
4488                         status |= TP_ACPI_VIDEO_S_DVI;
4489                 break;
4490         default:
4491                 return -ENOSYS;
4492         }
4493
4494         return status;
4495 }
4496
4497 static int video_outputsw_set(int status)
4498 {
4499         int autosw;
4500         int res = 0;
4501
4502         switch (video_supported) {
4503         case TPACPI_VIDEO_570:
4504                 res = acpi_evalf(NULL, NULL,
4505                                  "\\_SB.PHS2", "vdd",
4506                                  TP_ACPI_VIDEO_570_PHS2CMD,
4507                                  status | TP_ACPI_VIDEO_570_PHS2SET);
4508                 break;
4509         case TPACPI_VIDEO_770:
4510                 autosw = video_autosw_get();
4511                 if (autosw < 0)
4512                         return autosw;
4513
4514                 res = video_autosw_set(1);
4515                 if (res)
4516                         return res;
4517                 res = acpi_evalf(vid_handle, NULL,
4518                                  "ASWT", "vdd", status * 0x100, 0);
4519                 if (!autosw && video_autosw_set(autosw)) {
4520                         printk(TPACPI_ERR
4521                                "video auto-switch left enabled due to error\n");
4522                         return -EIO;
4523                 }
4524                 break;
4525         case TPACPI_VIDEO_NEW:
4526                 res = acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0x80) &&
4527                       acpi_evalf(NULL, NULL, "\\VSDS", "vdd", status, 1);
4528                 break;
4529         default:
4530                 return -ENOSYS;
4531         }
4532
4533         return (res)? 0 : -EIO;
4534 }
4535
4536 static int video_autosw_get(void)
4537 {
4538         int autosw = 0;
4539
4540         switch (video_supported) {
4541         case TPACPI_VIDEO_570:
4542                 if (!acpi_evalf(vid_handle, &autosw, "SWIT", "d"))
4543                         return -EIO;
4544                 break;
4545         case TPACPI_VIDEO_770:
4546         case TPACPI_VIDEO_NEW:
4547                 if (!acpi_evalf(vid_handle, &autosw, "^VDEE", "d"))
4548                         return -EIO;
4549                 break;
4550         default:
4551                 return -ENOSYS;
4552         }
4553
4554         return autosw & 1;
4555 }
4556
4557 static int video_autosw_set(int enable)
4558 {
4559         if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", (enable)? 1 : 0))
4560                 return -EIO;
4561         return 0;
4562 }
4563
4564 static int video_outputsw_cycle(void)
4565 {
4566         int autosw = video_autosw_get();
4567         int res;
4568
4569         if (autosw < 0)
4570                 return autosw;
4571
4572         switch (video_supported) {
4573         case TPACPI_VIDEO_570:
4574                 res = video_autosw_set(1);
4575                 if (res)
4576                         return res;
4577                 res = acpi_evalf(ec_handle, NULL, "_Q16", "v");
4578                 break;
4579         case TPACPI_VIDEO_770:
4580         case TPACPI_VIDEO_NEW:
4581                 res = video_autosw_set(1);
4582                 if (res)
4583                         return res;
4584                 res = acpi_evalf(vid_handle, NULL, "VSWT", "v");
4585                 break;
4586         default:
4587                 return -ENOSYS;
4588         }
4589         if (!autosw && video_autosw_set(autosw)) {
4590                 printk(TPACPI_ERR
4591                        "video auto-switch left enabled due to error\n");
4592                 return -EIO;
4593         }
4594
4595         return (res)? 0 : -EIO;
4596 }
4597
4598 static int video_expand_toggle(void)
4599 {
4600         switch (video_supported) {
4601         case TPACPI_VIDEO_570:
4602                 return acpi_evalf(ec_handle, NULL, "_Q17", "v")?
4603                         0 : -EIO;
4604         case TPACPI_VIDEO_770:
4605                 return acpi_evalf(vid_handle, NULL, "VEXP", "v")?
4606                         0 : -EIO;
4607         case TPACPI_VIDEO_NEW:
4608                 return acpi_evalf(NULL, NULL, "\\VEXP", "v")?
4609                         0 : -EIO;
4610         default:
4611                 return -ENOSYS;
4612         }
4613         /* not reached */
4614 }
4615
4616 static int video_read(struct seq_file *m)
4617 {
4618         int status, autosw;
4619
4620         if (video_supported == TPACPI_VIDEO_NONE) {
4621                 seq_printf(m, "status:\t\tnot supported\n");
4622                 return 0;
4623         }
4624
4625         status = video_outputsw_get();
4626         if (status < 0)
4627                 return status;
4628
4629         autosw = video_autosw_get();
4630         if (autosw < 0)
4631                 return autosw;
4632
4633         seq_printf(m, "status:\t\tsupported\n");
4634         seq_printf(m, "lcd:\t\t%s\n", enabled(status, 0));
4635         seq_printf(m, "crt:\t\t%s\n", enabled(status, 1));
4636         if (video_supported == TPACPI_VIDEO_NEW)
4637                 seq_printf(m, "dvi:\t\t%s\n", enabled(status, 3));
4638         seq_printf(m, "auto:\t\t%s\n", enabled(autosw, 0));
4639         seq_printf(m, "commands:\tlcd_enable, lcd_disable\n");
4640         seq_printf(m, "commands:\tcrt_enable, crt_disable\n");
4641         if (video_supported == TPACPI_VIDEO_NEW)
4642                 seq_printf(m, "commands:\tdvi_enable, dvi_disable\n");
4643         seq_printf(m, "commands:\tauto_enable, auto_disable\n");
4644         seq_printf(m, "commands:\tvideo_switch, expand_toggle\n");
4645
4646         return 0;
4647 }
4648
4649 static int video_write(char *buf)
4650 {
4651         char *cmd;
4652         int enable, disable, status;
4653         int res;
4654
4655         if (video_supported == TPACPI_VIDEO_NONE)
4656                 return -ENODEV;
4657
4658         enable = 0;
4659         disable = 0;
4660
4661         while ((cmd = next_cmd(&buf))) {
4662                 if (strlencmp(cmd, "lcd_enable") == 0) {
4663                         enable |= TP_ACPI_VIDEO_S_LCD;
4664                 } else if (strlencmp(cmd, "lcd_disable") == 0) {
4665                         disable |= TP_ACPI_VIDEO_S_LCD;
4666                 } else if (strlencmp(cmd, "crt_enable") == 0) {
4667                         enable |= TP_ACPI_VIDEO_S_CRT;
4668                 } else if (strlencmp(cmd, "crt_disable") == 0) {
4669                         disable |= TP_ACPI_VIDEO_S_CRT;
4670                 } else if (video_supported == TPACPI_VIDEO_NEW &&
4671                            strlencmp(cmd, "dvi_enable") == 0) {
4672                         enable |= TP_ACPI_VIDEO_S_DVI;
4673                 } else if (video_supported == TPACPI_VIDEO_NEW &&
4674                            strlencmp(cmd, "dvi_disable") == 0) {
4675                         disable |= TP_ACPI_VIDEO_S_DVI;
4676                 } else if (strlencmp(cmd, "auto_enable") == 0) {
4677                         res = video_autosw_set(1);
4678                         if (res)
4679                                 return res;
4680                 } else if (strlencmp(cmd, "auto_disable") == 0) {
4681                         res = video_autosw_set(0);
4682                         if (res)
4683                                 return res;
4684                 } else if (strlencmp(cmd, "video_switch") == 0) {
4685                         res = video_outputsw_cycle();
4686                         if (res)
4687                                 return res;
4688                 } else if (strlencmp(cmd, "expand_toggle") == 0) {
4689                         res = video_expand_toggle();
4690                         if (res)
4691                                 return res;
4692                 } else
4693                         return -EINVAL;
4694         }
4695
4696         if (enable || disable) {
4697                 status = video_outputsw_get();
4698                 if (status < 0)
4699                         return status;
4700                 res = video_outputsw_set((status & ~disable) | enable);
4701                 if (res)
4702                         return res;
4703         }
4704
4705         return 0;
4706 }
4707
4708 static struct ibm_struct video_driver_data = {
4709         .name = "video",
4710         .read = video_read,
4711         .write = video_write,
4712         .exit = video_exit,
4713 };
4714
4715 #endif /* CONFIG_THINKPAD_ACPI_VIDEO */
4716
4717 /*************************************************************************
4718  * Light (thinklight) subdriver
4719  */
4720
4721 TPACPI_HANDLE(lght, root, "\\LGHT");    /* A21e, A2xm/p, T20-22, X20-21 */
4722 TPACPI_HANDLE(ledb, ec, "LEDB");                /* G4x */
4723
4724 static int light_get_status(void)
4725 {
4726         int status = 0;
4727
4728         if (tp_features.light_status) {
4729                 if (!acpi_evalf(ec_handle, &status, "KBLT", "d"))
4730                         return -EIO;
4731                 return (!!status);
4732         }
4733
4734         return -ENXIO;
4735 }
4736
4737 static int light_set_status(int status)
4738 {
4739         int rc;
4740
4741         if (tp_features.light) {
4742                 if (cmos_handle) {
4743                         rc = acpi_evalf(cmos_handle, NULL, NULL, "vd",
4744                                         (status)?
4745                                                 TP_CMOS_THINKLIGHT_ON :
4746                                                 TP_CMOS_THINKLIGHT_OFF);
4747                 } else {
4748                         rc = acpi_evalf(lght_handle, NULL, NULL, "vd",
4749                                         (status)? 1 : 0);
4750                 }
4751                 return (rc)? 0 : -EIO;
4752         }
4753
4754         return -ENXIO;
4755 }
4756
4757 static void light_set_status_worker(struct work_struct *work)
4758 {
4759         struct tpacpi_led_classdev *data =
4760                         container_of(work, struct tpacpi_led_classdev, work);
4761
4762         if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING))
4763                 light_set_status((data->new_state != TPACPI_LED_OFF));
4764 }
4765
4766 static void light_sysfs_set(struct led_classdev *led_cdev,
4767                         enum led_brightness brightness)
4768 {
4769         struct tpacpi_led_classdev *data =
4770                 container_of(led_cdev,
4771                              struct tpacpi_led_classdev,
4772                              led_classdev);
4773         data->new_state = (brightness != LED_OFF) ?
4774                                 TPACPI_LED_ON : TPACPI_LED_OFF;
4775         queue_work(tpacpi_wq, &data->work);
4776 }
4777
4778 static enum led_brightness light_sysfs_get(struct led_classdev *led_cdev)
4779 {
4780         return (light_get_status() == 1)? LED_FULL : LED_OFF;
4781 }
4782
4783 static struct tpacpi_led_classdev tpacpi_led_thinklight = {
4784         .led_classdev = {
4785                 .name           = "tpacpi::thinklight",
4786                 .brightness_set = &light_sysfs_set,
4787                 .brightness_get = &light_sysfs_get,
4788         }
4789 };
4790
4791 static int __init light_init(struct ibm_init_struct *iibm)
4792 {
4793         int rc;
4794
4795         vdbg_printk(TPACPI_DBG_INIT, "initializing light subdriver\n");
4796
4797         TPACPI_ACPIHANDLE_INIT(ledb);
4798         TPACPI_ACPIHANDLE_INIT(lght);
4799         TPACPI_ACPIHANDLE_INIT(cmos);
4800         INIT_WORK(&tpacpi_led_thinklight.work, light_set_status_worker);
4801
4802         /* light not supported on 570, 600e/x, 770e, 770x, G4x, R30, R31 */
4803         tp_features.light = (cmos_handle || lght_handle) && !ledb_handle;
4804
4805         if (tp_features.light)
4806                 /* light status not supported on
4807                    570, 600e/x, 770e, 770x, G4x, R30, R31, R32, X20 */
4808                 tp_features.light_status =
4809                         acpi_evalf(ec_handle, NULL, "KBLT", "qv");
4810
4811         vdbg_printk(TPACPI_DBG_INIT, "light is %s, light status is %s\n",
4812                 str_supported(tp_features.light),
4813                 str_supported(tp_features.light_status));
4814
4815         if (!tp_features.light)
4816                 return 1;
4817
4818         rc = led_classdev_register(&tpacpi_pdev->dev,
4819                                    &tpacpi_led_thinklight.led_classdev);
4820
4821         if (rc < 0) {
4822                 tp_features.light = 0;
4823                 tp_features.light_status = 0;
4824         } else  {
4825                 rc = 0;
4826         }
4827
4828         return rc;
4829 }
4830
4831 static void light_exit(void)
4832 {
4833         led_classdev_unregister(&tpacpi_led_thinklight.led_classdev);
4834         if (work_pending(&tpacpi_led_thinklight.work))
4835                 flush_workqueue(tpacpi_wq);
4836 }
4837
4838 static int light_read(struct seq_file *m)
4839 {
4840         int status;
4841
4842         if (!tp_features.light) {
4843                 seq_printf(m, "status:\t\tnot supported\n");
4844         } else if (!tp_features.light_status) {
4845                 seq_printf(m, "status:\t\tunknown\n");
4846                 seq_printf(m, "commands:\ton, off\n");
4847         } else {
4848                 status = light_get_status();
4849                 if (status < 0)
4850                         return status;
4851                 seq_printf(m, "status:\t\t%s\n", onoff(status, 0));
4852                 seq_printf(m, "commands:\ton, off\n");
4853         }
4854
4855         return 0;
4856 }
4857
4858 static int light_write(char *buf)
4859 {
4860         char *cmd;
4861         int newstatus = 0;
4862
4863         if (!tp_features.light)
4864                 return -ENODEV;
4865
4866         while ((cmd = next_cmd(&buf))) {
4867                 if (strlencmp(cmd, "on") == 0) {
4868                         newstatus = 1;
4869                 } else if (strlencmp(cmd, "off") == 0) {
4870                         newstatus = 0;
4871                 } else
4872                         return -EINVAL;
4873         }
4874
4875         return light_set_status(newstatus);
4876 }
4877
4878 static struct ibm_struct light_driver_data = {
4879         .name = "light",
4880         .read = light_read,
4881         .write = light_write,
4882         .exit = light_exit,
4883 };
4884
4885 /*************************************************************************
4886  * CMOS subdriver
4887  */
4888
4889 /* sysfs cmos_command -------------------------------------------------- */
4890 static ssize_t cmos_command_store(struct device *dev,
4891                             struct device_attribute *attr,
4892                             const char *buf, size_t count)
4893 {
4894         unsigned long cmos_cmd;
4895         int res;
4896
4897         if (parse_strtoul(buf, 21, &cmos_cmd))
4898                 return -EINVAL;
4899
4900         res = issue_thinkpad_cmos_command(cmos_cmd);
4901         return (res)? res : count;
4902 }
4903
4904 static struct device_attribute dev_attr_cmos_command =
4905         __ATTR(cmos_command, S_IWUSR, NULL, cmos_command_store);
4906
4907 /* --------------------------------------------------------------------- */
4908
4909 static int __init cmos_init(struct ibm_init_struct *iibm)
4910 {
4911         int res;
4912
4913         vdbg_printk(TPACPI_DBG_INIT,
4914                 "initializing cmos commands subdriver\n");
4915
4916         TPACPI_ACPIHANDLE_INIT(cmos);
4917
4918         vdbg_printk(TPACPI_DBG_INIT, "cmos commands are %s\n",
4919                 str_supported(cmos_handle != NULL));
4920
4921         res = device_create_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
4922         if (res)
4923                 return res;
4924
4925         return (cmos_handle)? 0 : 1;
4926 }
4927
4928 static void cmos_exit(void)
4929 {
4930         device_remove_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
4931 }
4932
4933 static int cmos_read(struct seq_file *m)
4934 {
4935         /* cmos not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
4936            R30, R31, T20-22, X20-21 */
4937         if (!cmos_handle)
4938                 seq_printf(m, "status:\t\tnot supported\n");
4939         else {
4940                 seq_printf(m, "status:\t\tsupported\n");
4941                 seq_printf(m, "commands:\t<cmd> (<cmd> is 0-21)\n");
4942         }
4943
4944         return 0;
4945 }
4946
4947 static int cmos_write(char *buf)
4948 {
4949         char *cmd;
4950         int cmos_cmd, res;
4951
4952         while ((cmd = next_cmd(&buf))) {
4953                 if (sscanf(cmd, "%u", &cmos_cmd) == 1 &&
4954                     cmos_cmd >= 0 && cmos_cmd <= 21) {
4955                         /* cmos_cmd set */
4956                 } else
4957                         return -EINVAL;
4958
4959                 res = issue_thinkpad_cmos_command(cmos_cmd);
4960                 if (res)
4961                         return res;
4962         }
4963
4964         return 0;
4965 }
4966
4967 static struct ibm_struct cmos_driver_data = {
4968         .name = "cmos",
4969         .read = cmos_read,
4970         .write = cmos_write,
4971         .exit = cmos_exit,
4972 };
4973
4974 /*************************************************************************
4975  * LED subdriver
4976  */
4977
4978 enum led_access_mode {
4979         TPACPI_LED_NONE = 0,
4980         TPACPI_LED_570, /* 570 */
4981         TPACPI_LED_OLD, /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
4982         TPACPI_LED_NEW, /* all others */
4983 };
4984
4985 enum {  /* For TPACPI_LED_OLD */
4986         TPACPI_LED_EC_HLCL = 0x0c,      /* EC reg to get led to power on */
4987         TPACPI_LED_EC_HLBL = 0x0d,      /* EC reg to blink a lit led */
4988         TPACPI_LED_EC_HLMS = 0x0e,      /* EC reg to select led to command */
4989 };
4990
4991 static enum led_access_mode led_supported;
4992
4993 TPACPI_HANDLE(led, ec, "SLED",  /* 570 */
4994            "SYSL",              /* 600e/x, 770e, 770x, A21e, A2xm/p, */
4995                                 /* T20-22, X20-21 */
4996            "LED",               /* all others */
4997            );                   /* R30, R31 */
4998
4999 #define TPACPI_LED_NUMLEDS 16
5000 static struct tpacpi_led_classdev *tpacpi_leds;
5001 static enum led_status_t tpacpi_led_state_cache[TPACPI_LED_NUMLEDS];
5002 static const char * const tpacpi_led_names[TPACPI_LED_NUMLEDS] = {
5003         /* there's a limit of 19 chars + NULL before 2.6.26 */
5004         "tpacpi::power",
5005         "tpacpi:orange:batt",
5006         "tpacpi:green:batt",
5007         "tpacpi::dock_active",
5008         "tpacpi::bay_active",
5009         "tpacpi::dock_batt",
5010         "tpacpi::unknown_led",
5011         "tpacpi::standby",
5012         "tpacpi::dock_status1",
5013         "tpacpi::dock_status2",
5014         "tpacpi::unknown_led2",
5015         "tpacpi::unknown_led3",
5016         "tpacpi::thinkvantage",
5017 };
5018 #define TPACPI_SAFE_LEDS        0x1081U
5019
5020 static inline bool tpacpi_is_led_restricted(const unsigned int led)
5021 {
5022 #ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS
5023         return false;
5024 #else
5025         return (1U & (TPACPI_SAFE_LEDS >> led)) == 0;
5026 #endif
5027 }
5028
5029 static int led_get_status(const unsigned int led)
5030 {
5031         int status;
5032         enum led_status_t led_s;
5033
5034         switch (led_supported) {
5035         case TPACPI_LED_570:
5036                 if (!acpi_evalf(ec_handle,
5037                                 &status, "GLED", "dd", 1 << led))
5038                         return -EIO;
5039                 led_s = (status == 0)?
5040                                 TPACPI_LED_OFF :
5041                                 ((status == 1)?
5042                                         TPACPI_LED_ON :
5043                                         TPACPI_LED_BLINK);
5044                 tpacpi_led_state_cache[led] = led_s;
5045                 return led_s;
5046         default:
5047                 return -ENXIO;
5048         }
5049
5050         /* not reached */
5051 }
5052
5053 static int led_set_status(const unsigned int led,
5054                           const enum led_status_t ledstatus)
5055 {
5056         /* off, on, blink. Index is led_status_t */
5057         static const unsigned int led_sled_arg1[] = { 0, 1, 3 };
5058         static const unsigned int led_led_arg1[] = { 0, 0x80, 0xc0 };
5059
5060         int rc = 0;
5061
5062         switch (led_supported) {
5063         case TPACPI_LED_570:
5064                 /* 570 */
5065                 if (unlikely(led > 7))
5066                         return -EINVAL;
5067                 if (unlikely(tpacpi_is_led_restricted(led)))
5068                         return -EPERM;
5069                 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
5070                                 (1 << led), led_sled_arg1[ledstatus]))
5071                         rc = -EIO;
5072                 break;
5073         case TPACPI_LED_OLD:
5074                 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */
5075                 if (unlikely(led > 7))
5076                         return -EINVAL;
5077                 if (unlikely(tpacpi_is_led_restricted(led)))
5078                         return -EPERM;
5079                 rc = ec_write(TPACPI_LED_EC_HLMS, (1 << led));
5080                 if (rc >= 0)
5081                         rc = ec_write(TPACPI_LED_EC_HLBL,
5082                                       (ledstatus == TPACPI_LED_BLINK) << led);
5083                 if (rc >= 0)
5084                         rc = ec_write(TPACPI_LED_EC_HLCL,
5085                                       (ledstatus != TPACPI_LED_OFF) << led);
5086                 break;
5087         case TPACPI_LED_NEW:
5088                 /* all others */
5089                 if (unlikely(led >= TPACPI_LED_NUMLEDS))
5090                         return -EINVAL;
5091                 if (unlikely(tpacpi_is_led_restricted(led)))
5092                         return -EPERM;
5093                 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
5094                                 led, led_led_arg1[ledstatus]))
5095                         rc = -EIO;
5096                 break;
5097         default:
5098                 rc = -ENXIO;
5099         }
5100
5101         if (!rc)
5102                 tpacpi_led_state_cache[led] = ledstatus;
5103
5104         return rc;
5105 }
5106
5107 static void led_set_status_worker(struct work_struct *work)
5108 {
5109         struct tpacpi_led_classdev *data =
5110                 container_of(work, struct tpacpi_led_classdev, work);
5111
5112         if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING))
5113                 led_set_status(data->led, data->new_state);
5114 }
5115
5116 static void led_sysfs_set(struct led_classdev *led_cdev,
5117                         enum led_brightness brightness)
5118 {
5119         struct tpacpi_led_classdev *data = container_of(led_cdev,
5120                              struct tpacpi_led_classdev, led_classdev);
5121
5122         if (brightness == LED_OFF)
5123                 data->new_state = TPACPI_LED_OFF;
5124         else if (tpacpi_led_state_cache[data->led] != TPACPI_LED_BLINK)
5125                 data->new_state = TPACPI_LED_ON;
5126         else
5127                 data->new_state = TPACPI_LED_BLINK;
5128
5129         queue_work(tpacpi_wq, &data->work);
5130 }
5131
5132 static int led_sysfs_blink_set(struct led_classdev *led_cdev,
5133                         unsigned long *delay_on, unsigned long *delay_off)
5134 {
5135         struct tpacpi_led_classdev *data = container_of(led_cdev,
5136                              struct tpacpi_led_classdev, led_classdev);
5137
5138         /* Can we choose the flash rate? */
5139         if (*delay_on == 0 && *delay_off == 0) {
5140                 /* yes. set them to the hardware blink rate (1 Hz) */
5141                 *delay_on = 500; /* ms */
5142                 *delay_off = 500; /* ms */
5143         } else if ((*delay_on != 500) || (*delay_off != 500))
5144                 return -EINVAL;
5145
5146         data->new_state = TPACPI_LED_BLINK;
5147         queue_work(tpacpi_wq, &data->work);
5148
5149         return 0;
5150 }
5151
5152 static enum led_brightness led_sysfs_get(struct led_classdev *led_cdev)
5153 {
5154         int rc;
5155
5156         struct tpacpi_led_classdev *data = container_of(led_cdev,
5157                              struct tpacpi_led_classdev, led_classdev);
5158
5159         rc = led_get_status(data->led);
5160
5161         if (rc == TPACPI_LED_OFF || rc < 0)
5162                 rc = LED_OFF;   /* no error handling in led class :( */
5163         else
5164                 rc = LED_FULL;
5165
5166         return rc;
5167 }
5168
5169 static void led_exit(void)
5170 {
5171         unsigned int i;
5172
5173         for (i = 0; i < TPACPI_LED_NUMLEDS; i++) {
5174                 if (tpacpi_leds[i].led_classdev.name)
5175                         led_classdev_unregister(&tpacpi_leds[i].led_classdev);
5176         }
5177
5178         kfree(tpacpi_leds);
5179 }
5180
5181 static int __init tpacpi_init_led(unsigned int led)
5182 {
5183         int rc;
5184
5185         tpacpi_leds[led].led = led;
5186
5187         /* LEDs with no name don't get registered */
5188         if (!tpacpi_led_names[led])
5189                 return 0;
5190
5191         tpacpi_leds[led].led_classdev.brightness_set = &led_sysfs_set;
5192         tpacpi_leds[led].led_classdev.blink_set = &led_sysfs_blink_set;
5193         if (led_supported == TPACPI_LED_570)
5194                 tpacpi_leds[led].led_classdev.brightness_get =
5195                                                 &led_sysfs_get;
5196
5197         tpacpi_leds[led].led_classdev.name = tpacpi_led_names[led];
5198
5199         INIT_WORK(&tpacpi_leds[led].work, led_set_status_worker);
5200
5201         rc = led_classdev_register(&tpacpi_pdev->dev,
5202                                 &tpacpi_leds[led].led_classdev);
5203         if (rc < 0)
5204                 tpacpi_leds[led].led_classdev.name = NULL;
5205
5206         return rc;
5207 }
5208
5209 static const struct tpacpi_quirk led_useful_qtable[] __initconst = {
5210         TPACPI_Q_IBM('1', 'E', 0x009f), /* A30 */
5211         TPACPI_Q_IBM('1', 'N', 0x009f), /* A31 */
5212         TPACPI_Q_IBM('1', 'G', 0x009f), /* A31 */
5213
5214         TPACPI_Q_IBM('1', 'I', 0x0097), /* T30 */
5215         TPACPI_Q_IBM('1', 'R', 0x0097), /* T40, T41, T42, R50, R51 */
5216         TPACPI_Q_IBM('7', '0', 0x0097), /* T43, R52 */
5217         TPACPI_Q_IBM('1', 'Y', 0x0097), /* T43 */
5218         TPACPI_Q_IBM('1', 'W', 0x0097), /* R50e */
5219         TPACPI_Q_IBM('1', 'V', 0x0097), /* R51 */
5220         TPACPI_Q_IBM('7', '8', 0x0097), /* R51e */
5221         TPACPI_Q_IBM('7', '6', 0x0097), /* R52 */
5222
5223         TPACPI_Q_IBM('1', 'K', 0x00bf), /* X30 */
5224         TPACPI_Q_IBM('1', 'Q', 0x00bf), /* X31, X32 */
5225         TPACPI_Q_IBM('1', 'U', 0x00bf), /* X40 */
5226         TPACPI_Q_IBM('7', '4', 0x00bf), /* X41 */
5227         TPACPI_Q_IBM('7', '5', 0x00bf), /* X41t */
5228
5229         TPACPI_Q_IBM('7', '9', 0x1f97), /* T60 (1) */
5230         TPACPI_Q_IBM('7', '7', 0x1f97), /* Z60* (1) */
5231         TPACPI_Q_IBM('7', 'F', 0x1f97), /* Z61* (1) */
5232         TPACPI_Q_IBM('7', 'B', 0x1fb7), /* X60 (1) */
5233
5234         /* (1) - may have excess leds enabled on MSB */
5235
5236         /* Defaults (order matters, keep last, don't reorder!) */
5237         { /* Lenovo */
5238           .vendor = PCI_VENDOR_ID_LENOVO,
5239           .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY,
5240           .quirks = 0x1fffU,
5241         },
5242         { /* IBM ThinkPads with no EC version string */
5243           .vendor = PCI_VENDOR_ID_IBM,
5244           .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_UNKNOWN,
5245           .quirks = 0x00ffU,
5246         },
5247         { /* IBM ThinkPads with EC version string */
5248           .vendor = PCI_VENDOR_ID_IBM,
5249           .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY,
5250           .quirks = 0x00bfU,
5251         },
5252 };
5253
5254 #undef TPACPI_LEDQ_IBM
5255 #undef TPACPI_LEDQ_LNV
5256
5257 static int __init led_init(struct ibm_init_struct *iibm)
5258 {
5259         unsigned int i;
5260         int rc;
5261         unsigned long useful_leds;
5262
5263         vdbg_printk(TPACPI_DBG_INIT, "initializing LED subdriver\n");
5264
5265         TPACPI_ACPIHANDLE_INIT(led);
5266
5267         if (!led_handle)
5268                 /* led not supported on R30, R31 */
5269                 led_supported = TPACPI_LED_NONE;
5270         else if (strlencmp(led_path, "SLED") == 0)
5271                 /* 570 */
5272                 led_supported = TPACPI_LED_570;
5273         else if (strlencmp(led_path, "SYSL") == 0)
5274                 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
5275                 led_supported = TPACPI_LED_OLD;
5276         else
5277                 /* all others */
5278                 led_supported = TPACPI_LED_NEW;
5279
5280         vdbg_printk(TPACPI_DBG_INIT, "LED commands are %s, mode %d\n",
5281                 str_supported(led_supported), led_supported);
5282
5283         if (led_supported == TPACPI_LED_NONE)
5284                 return 1;
5285
5286         tpacpi_leds = kzalloc(sizeof(*tpacpi_leds) * TPACPI_LED_NUMLEDS,
5287                               GFP_KERNEL);
5288         if (!tpacpi_leds) {
5289                 printk(TPACPI_ERR "Out of memory for LED data\n");
5290                 return -ENOMEM;
5291         }
5292
5293         useful_leds = tpacpi_check_quirks(led_useful_qtable,
5294                                           ARRAY_SIZE(led_useful_qtable));
5295
5296         for (i = 0; i < TPACPI_LED_NUMLEDS; i++) {
5297                 if (!tpacpi_is_led_restricted(i) &&
5298                     test_bit(i, &useful_leds)) {
5299                         rc = tpacpi_init_led(i);
5300                         if (rc < 0) {
5301                                 led_exit();
5302                                 return rc;
5303                         }
5304                 }
5305         }
5306
5307 #ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS
5308         printk(TPACPI_NOTICE
5309                 "warning: userspace override of important "
5310                 "firmware LEDs is enabled\n");
5311 #endif
5312         return 0;
5313 }
5314
5315 #define str_led_status(s) \
5316         ((s) == TPACPI_LED_OFF ? "off" : \
5317                 ((s) == TPACPI_LED_ON ? "on" : "blinking"))
5318
5319 static int led_read(struct seq_file *m)
5320 {
5321         if (!led_supported) {
5322                 seq_printf(m, "status:\t\tnot supported\n");
5323                 return 0;
5324         }
5325         seq_printf(m, "status:\t\tsupported\n");
5326
5327         if (led_supported == TPACPI_LED_570) {
5328                 /* 570 */
5329                 int i, status;
5330                 for (i = 0; i < 8; i++) {
5331                         status = led_get_status(i);
5332                         if (status < 0)
5333                                 return -EIO;
5334                         seq_printf(m, "%d:\t\t%s\n",
5335                                        i, str_led_status(status));
5336                 }
5337         }
5338
5339         seq_printf(m, "commands:\t"
5340                        "<led> on, <led> off, <led> blink (<led> is 0-15)\n");
5341
5342         return 0;
5343 }
5344
5345 static int led_write(char *buf)
5346 {
5347         char *cmd;
5348         int led, rc;
5349         enum led_status_t s;
5350
5351         if (!led_supported)
5352                 return -ENODEV;
5353
5354         while ((cmd = next_cmd(&buf))) {
5355                 if (sscanf(cmd, "%d", &led) != 1 || led < 0 || led > 15)
5356                         return -EINVAL;
5357
5358                 if (strstr(cmd, "off")) {
5359                         s = TPACPI_LED_OFF;
5360                 } else if (strstr(cmd, "on")) {
5361                         s = TPACPI_LED_ON;
5362                 } else if (strstr(cmd, "blink")) {
5363                         s = TPACPI_LED_BLINK;
5364                 } else {
5365                         return -EINVAL;
5366                 }
5367
5368                 rc = led_set_status(led, s);
5369                 if (rc < 0)
5370                         return rc;
5371         }
5372
5373         return 0;
5374 }
5375
5376 static struct ibm_struct led_driver_data = {
5377         .name = "led",
5378         .read = led_read,
5379         .write = led_write,
5380         .exit = led_exit,
5381 };
5382
5383 /*************************************************************************
5384  * Beep subdriver
5385  */
5386
5387 TPACPI_HANDLE(beep, ec, "BEEP");        /* all except R30, R31 */
5388
5389 #define TPACPI_BEEP_Q1 0x0001
5390
5391 static const struct tpacpi_quirk beep_quirk_table[] __initconst = {
5392         TPACPI_Q_IBM('I', 'M', TPACPI_BEEP_Q1), /* 570 */
5393         TPACPI_Q_IBM('I', 'U', TPACPI_BEEP_Q1), /* 570E - unverified */
5394 };
5395
5396 static int __init beep_init(struct ibm_init_struct *iibm)
5397 {
5398         unsigned long quirks;
5399
5400         vdbg_printk(TPACPI_DBG_INIT, "initializing beep subdriver\n");
5401
5402         TPACPI_ACPIHANDLE_INIT(beep);
5403
5404         vdbg_printk(TPACPI_DBG_INIT, "beep is %s\n",
5405                 str_supported(beep_handle != NULL));
5406
5407         quirks = tpacpi_check_quirks(beep_quirk_table,
5408                                      ARRAY_SIZE(beep_quirk_table));
5409
5410         tp_features.beep_needs_two_args = !!(quirks & TPACPI_BEEP_Q1);
5411
5412         return (beep_handle)? 0 : 1;
5413 }
5414
5415 static int beep_read(struct seq_file *m)
5416 {
5417         if (!beep_handle)
5418                 seq_printf(m, "status:\t\tnot supported\n");
5419         else {
5420                 seq_printf(m, "status:\t\tsupported\n");
5421                 seq_printf(m, "commands:\t<cmd> (<cmd> is 0-17)\n");
5422         }
5423
5424         return 0;
5425 }
5426
5427 static int beep_write(char *buf)
5428 {
5429         char *cmd;
5430         int beep_cmd;
5431
5432         if (!beep_handle)
5433                 return -ENODEV;
5434
5435         while ((cmd = next_cmd(&buf))) {
5436                 if (sscanf(cmd, "%u", &beep_cmd) == 1 &&
5437                     beep_cmd >= 0 && beep_cmd <= 17) {
5438                         /* beep_cmd set */
5439                 } else
5440                         return -EINVAL;
5441                 if (tp_features.beep_needs_two_args) {
5442                         if (!acpi_evalf(beep_handle, NULL, NULL, "vdd",
5443                                         beep_cmd, 0))
5444                                 return -EIO;
5445                 } else {
5446                         if (!acpi_evalf(beep_handle, NULL, NULL, "vd",
5447                                         beep_cmd))
5448                                 return -EIO;
5449                 }
5450         }
5451
5452         return 0;
5453 }
5454
5455 static struct ibm_struct beep_driver_data = {
5456         .name = "beep",
5457         .read = beep_read,
5458         .write = beep_write,
5459 };
5460
5461 /*************************************************************************
5462  * Thermal subdriver
5463  */
5464
5465 enum thermal_access_mode {
5466         TPACPI_THERMAL_NONE = 0,        /* No thermal support */
5467         TPACPI_THERMAL_ACPI_TMP07,      /* Use ACPI TMP0-7 */
5468         TPACPI_THERMAL_ACPI_UPDT,       /* Use ACPI TMP0-7 with UPDT */
5469         TPACPI_THERMAL_TPEC_8,          /* Use ACPI EC regs, 8 sensors */
5470         TPACPI_THERMAL_TPEC_16,         /* Use ACPI EC regs, 16 sensors */
5471 };
5472
5473 enum { /* TPACPI_THERMAL_TPEC_* */
5474         TP_EC_THERMAL_TMP0 = 0x78,      /* ACPI EC regs TMP 0..7 */
5475         TP_EC_THERMAL_TMP8 = 0xC0,      /* ACPI EC regs TMP 8..15 */
5476         TP_EC_THERMAL_TMP_NA = -128,    /* ACPI EC sensor not available */
5477
5478         TPACPI_THERMAL_SENSOR_NA = -128000, /* Sensor not available */
5479 };
5480
5481
5482 #define TPACPI_MAX_THERMAL_SENSORS 16   /* Max thermal sensors supported */
5483 struct ibm_thermal_sensors_struct {
5484         s32 temp[TPACPI_MAX_THERMAL_SENSORS];
5485 };
5486
5487 static enum thermal_access_mode thermal_read_mode;
5488
5489 /* idx is zero-based */
5490 static int thermal_get_sensor(int idx, s32 *value)
5491 {
5492         int t;
5493         s8 tmp;
5494         char tmpi[5];
5495
5496         t = TP_EC_THERMAL_TMP0;
5497
5498         switch (thermal_read_mode) {
5499 #if TPACPI_MAX_THERMAL_SENSORS >= 16
5500         case TPACPI_THERMAL_TPEC_16:
5501                 if (idx >= 8 && idx <= 15) {
5502                         t = TP_EC_THERMAL_TMP8;
5503                         idx -= 8;
5504                 }
5505                 /* fallthrough */
5506 #endif
5507         case TPACPI_THERMAL_TPEC_8:
5508                 if (idx <= 7) {
5509                         if (!acpi_ec_read(t + idx, &tmp))
5510                                 return -EIO;
5511                         *value = tmp * 1000;
5512                         return 0;
5513                 }
5514                 break;
5515
5516         case TPACPI_THERMAL_ACPI_UPDT:
5517                 if (idx <= 7) {
5518                         snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
5519                         if (!acpi_evalf(ec_handle, NULL, "UPDT", "v"))
5520                                 return -EIO;
5521                         if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
5522                                 return -EIO;
5523                         *value = (t - 2732) * 100;
5524                         return 0;
5525                 }
5526                 break;
5527
5528         case TPACPI_THERMAL_ACPI_TMP07:
5529                 if (idx <= 7) {
5530                         snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
5531                         if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
5532                                 return -EIO;
5533                         if (t > 127 || t < -127)
5534                                 t = TP_EC_THERMAL_TMP_NA;
5535                         *value = t * 1000;
5536                         return 0;
5537                 }
5538                 break;
5539
5540         case TPACPI_THERMAL_NONE:
5541         default:
5542                 return -ENOSYS;
5543         }
5544
5545         return -EINVAL;
5546 }
5547
5548 static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s)
5549 {
5550         int res, i;
5551         int n;
5552
5553         n = 8;
5554         i = 0;
5555
5556         if (!s)
5557                 return -EINVAL;
5558
5559         if (thermal_read_mode == TPACPI_THERMAL_TPEC_16)
5560                 n = 16;
5561
5562         for (i = 0 ; i < n; i++) {
5563                 res = thermal_get_sensor(i, &s->temp[i]);
5564                 if (res)
5565                         return res;
5566         }
5567
5568         return n;
5569 }
5570
5571 static void thermal_dump_all_sensors(void)
5572 {
5573         int n, i;
5574         struct ibm_thermal_sensors_struct t;
5575
5576         n = thermal_get_sensors(&t);
5577         if (n <= 0)
5578                 return;
5579
5580         printk(TPACPI_NOTICE
5581                 "temperatures (Celsius):");
5582
5583         for (i = 0; i < n; i++) {
5584                 if (t.temp[i] != TPACPI_THERMAL_SENSOR_NA)
5585                         printk(KERN_CONT " %d", (int)(t.temp[i] / 1000));
5586                 else
5587                         printk(KERN_CONT " N/A");
5588         }
5589
5590         printk(KERN_CONT "\n");
5591 }
5592
5593 /* sysfs temp##_input -------------------------------------------------- */
5594
5595 static ssize_t thermal_temp_input_show(struct device *dev,
5596                            struct device_attribute *attr,
5597                            char *buf)
5598 {
5599         struct sensor_device_attribute *sensor_attr =
5600                                         to_sensor_dev_attr(attr);
5601         int idx = sensor_attr->index;
5602         s32 value;
5603         int res;
5604
5605         res = thermal_get_sensor(idx, &value);
5606         if (res)
5607                 return res;
5608         if (value == TPACPI_THERMAL_SENSOR_NA)
5609                 return -ENXIO;
5610
5611         return snprintf(buf, PAGE_SIZE, "%d\n", value);
5612 }
5613
5614 #define THERMAL_SENSOR_ATTR_TEMP(_idxA, _idxB) \
5615          SENSOR_ATTR(temp##_idxA##_input, S_IRUGO, \
5616                      thermal_temp_input_show, NULL, _idxB)
5617
5618 static struct sensor_device_attribute sensor_dev_attr_thermal_temp_input[] = {
5619         THERMAL_SENSOR_ATTR_TEMP(1, 0),
5620         THERMAL_SENSOR_ATTR_TEMP(2, 1),
5621         THERMAL_SENSOR_ATTR_TEMP(3, 2),
5622         THERMAL_SENSOR_ATTR_TEMP(4, 3),
5623         THERMAL_SENSOR_ATTR_TEMP(5, 4),
5624         THERMAL_SENSOR_ATTR_TEMP(6, 5),
5625         THERMAL_SENSOR_ATTR_TEMP(7, 6),
5626         THERMAL_SENSOR_ATTR_TEMP(8, 7),
5627         THERMAL_SENSOR_ATTR_TEMP(9, 8),
5628         THERMAL_SENSOR_ATTR_TEMP(10, 9),
5629         THERMAL_SENSOR_ATTR_TEMP(11, 10),
5630         THERMAL_SENSOR_ATTR_TEMP(12, 11),
5631         THERMAL_SENSOR_ATTR_TEMP(13, 12),
5632         THERMAL_SENSOR_ATTR_TEMP(14, 13),
5633         THERMAL_SENSOR_ATTR_TEMP(15, 14),
5634         THERMAL_SENSOR_ATTR_TEMP(16, 15),
5635 };
5636
5637 #define THERMAL_ATTRS(X) \
5638         &sensor_dev_attr_thermal_temp_input[X].dev_attr.attr
5639
5640 static struct attribute *thermal_temp_input_attr[] = {
5641         THERMAL_ATTRS(8),
5642         THERMAL_ATTRS(9),
5643         THERMAL_ATTRS(10),
5644         THERMAL_ATTRS(11),
5645         THERMAL_ATTRS(12),
5646         THERMAL_ATTRS(13),
5647         THERMAL_ATTRS(14),
5648         THERMAL_ATTRS(15),
5649         THERMAL_ATTRS(0),
5650         THERMAL_ATTRS(1),
5651         THERMAL_ATTRS(2),
5652         THERMAL_ATTRS(3),
5653         THERMAL_ATTRS(4),
5654         THERMAL_ATTRS(5),
5655         THERMAL_ATTRS(6),
5656         THERMAL_ATTRS(7),
5657         NULL
5658 };
5659
5660 static const struct attribute_group thermal_temp_input16_group = {
5661         .attrs = thermal_temp_input_attr
5662 };
5663
5664 static const struct attribute_group thermal_temp_input8_group = {
5665         .attrs = &thermal_temp_input_attr[8]
5666 };
5667
5668 #undef THERMAL_SENSOR_ATTR_TEMP
5669 #undef THERMAL_ATTRS
5670
5671 /* --------------------------------------------------------------------- */
5672
5673 static int __init thermal_init(struct ibm_init_struct *iibm)
5674 {
5675         u8 t, ta1, ta2;
5676         int i;
5677         int acpi_tmp7;
5678         int res;
5679
5680         vdbg_printk(TPACPI_DBG_INIT, "initializing thermal subdriver\n");
5681
5682         acpi_tmp7 = acpi_evalf(ec_handle, NULL, "TMP7", "qv");
5683
5684         if (thinkpad_id.ec_model) {
5685                 /*
5686                  * Direct EC access mode: sensors at registers
5687                  * 0x78-0x7F, 0xC0-0xC7.  Registers return 0x00 for
5688                  * non-implemented, thermal sensors return 0x80 when
5689                  * not available
5690                  */
5691
5692                 ta1 = ta2 = 0;
5693                 for (i = 0; i < 8; i++) {
5694                         if (acpi_ec_read(TP_EC_THERMAL_TMP0 + i, &t)) {
5695                                 ta1 |= t;
5696                         } else {
5697                                 ta1 = 0;
5698                                 break;
5699                         }
5700                         if (acpi_ec_read(TP_EC_THERMAL_TMP8 + i, &t)) {
5701                                 ta2 |= t;
5702                         } else {
5703                                 ta1 = 0;
5704                                 break;
5705                         }
5706                 }
5707                 if (ta1 == 0) {
5708                         /* This is sheer paranoia, but we handle it anyway */
5709                         if (acpi_tmp7) {
5710                                 printk(TPACPI_ERR
5711                                        "ThinkPad ACPI EC access misbehaving, "
5712                                        "falling back to ACPI TMPx access "
5713                                        "mode\n");
5714                                 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
5715                         } else {
5716                                 printk(TPACPI_ERR
5717                                        "ThinkPad ACPI EC access misbehaving, "
5718                                        "disabling thermal sensors access\n");
5719                                 thermal_read_mode = TPACPI_THERMAL_NONE;
5720                         }
5721                 } else {
5722                         thermal_read_mode =
5723                             (ta2 != 0) ?
5724                             TPACPI_THERMAL_TPEC_16 : TPACPI_THERMAL_TPEC_8;
5725                 }
5726         } else if (acpi_tmp7) {
5727                 if (acpi_evalf(ec_handle, NULL, "UPDT", "qv")) {
5728                         /* 600e/x, 770e, 770x */
5729                         thermal_read_mode = TPACPI_THERMAL_ACPI_UPDT;
5730                 } else {
5731                         /* Standard ACPI TMPx access, max 8 sensors */
5732                         thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
5733                 }
5734         } else {
5735                 /* temperatures not supported on 570, G4x, R30, R31, R32 */
5736                 thermal_read_mode = TPACPI_THERMAL_NONE;
5737         }
5738
5739         vdbg_printk(TPACPI_DBG_INIT, "thermal is %s, mode %d\n",
5740                 str_supported(thermal_read_mode != TPACPI_THERMAL_NONE),
5741                 thermal_read_mode);
5742
5743         switch (thermal_read_mode) {
5744         case TPACPI_THERMAL_TPEC_16:
5745                 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
5746                                 &thermal_temp_input16_group);
5747                 if (res)
5748                         return res;
5749                 break;
5750         case TPACPI_THERMAL_TPEC_8:
5751         case TPACPI_THERMAL_ACPI_TMP07:
5752         case TPACPI_THERMAL_ACPI_UPDT:
5753                 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
5754                                 &thermal_temp_input8_group);
5755                 if (res)
5756                         return res;
5757                 break;
5758         case TPACPI_THERMAL_NONE:
5759         default:
5760                 return 1;
5761         }
5762
5763         return 0;
5764 }
5765
5766 static void thermal_exit(void)
5767 {
5768         switch (thermal_read_mode) {
5769         case TPACPI_THERMAL_TPEC_16:
5770                 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
5771                                    &thermal_temp_input16_group);
5772                 break;
5773         case TPACPI_THERMAL_TPEC_8:
5774         case TPACPI_THERMAL_ACPI_TMP07:
5775         case TPACPI_THERMAL_ACPI_UPDT:
5776                 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
5777                                    &thermal_temp_input16_group);
5778                 break;
5779         case TPACPI_THERMAL_NONE:
5780         default:
5781                 break;
5782         }
5783 }
5784
5785 static int thermal_read(struct seq_file *m)
5786 {
5787         int n, i;
5788         struct ibm_thermal_sensors_struct t;
5789
5790         n = thermal_get_sensors(&t);
5791         if (unlikely(n < 0))
5792                 return n;
5793
5794         seq_printf(m, "temperatures:\t");
5795
5796         if (n > 0) {
5797                 for (i = 0; i < (n - 1); i++)
5798                         seq_printf(m, "%d ", t.temp[i] / 1000);
5799                 seq_printf(m, "%d\n", t.temp[i] / 1000);
5800         } else
5801                 seq_printf(m, "not supported\n");
5802
5803         return 0;
5804 }
5805
5806 static struct ibm_struct thermal_driver_data = {
5807         .name = "thermal",
5808         .read = thermal_read,
5809         .exit = thermal_exit,
5810 };
5811
5812 /*************************************************************************
5813  * EC Dump subdriver
5814  */
5815
5816 static u8 ecdump_regs[256];
5817
5818 static int ecdump_read(struct seq_file *m)
5819 {
5820         int i, j;
5821         u8 v;
5822
5823         seq_printf(m, "EC      "
5824                        " +00 +01 +02 +03 +04 +05 +06 +07"
5825                        " +08 +09 +0a +0b +0c +0d +0e +0f\n");
5826         for (i = 0; i < 256; i += 16) {
5827                 seq_printf(m, "EC 0x%02x:", i);
5828                 for (j = 0; j < 16; j++) {
5829                         if (!acpi_ec_read(i + j, &v))
5830                                 break;
5831                         if (v != ecdump_regs[i + j])
5832                                 seq_printf(m, " *%02x", v);
5833                         else
5834                                 seq_printf(m, "  %02x", v);
5835                         ecdump_regs[i + j] = v;
5836                 }
5837                 seq_putc(m, '\n');
5838                 if (j != 16)
5839                         break;
5840         }
5841
5842         /* These are way too dangerous to advertise openly... */
5843 #if 0
5844         seq_printf(m, "commands:\t0x<offset> 0x<value>"
5845                        " (<offset> is 00-ff, <value> is 00-ff)\n");
5846         seq_printf(m, "commands:\t0x<offset> <value>  "
5847                        " (<offset> is 00-ff, <value> is 0-255)\n");
5848 #endif
5849         return 0;
5850 }
5851
5852 static int ecdump_write(char *buf)
5853 {
5854         char *cmd;
5855         int i, v;
5856
5857         while ((cmd = next_cmd(&buf))) {
5858                 if (sscanf(cmd, "0x%x 0x%x", &i, &v) == 2) {
5859                         /* i and v set */
5860                 } else if (sscanf(cmd, "0x%x %u", &i, &v) == 2) {
5861                         /* i and v set */
5862                 } else
5863                         return -EINVAL;
5864                 if (i >= 0 && i < 256 && v >= 0 && v < 256) {
5865                         if (!acpi_ec_write(i, v))
5866                                 return -EIO;
5867                 } else
5868                         return -EINVAL;
5869         }
5870
5871         return 0;
5872 }
5873
5874 static struct ibm_struct ecdump_driver_data = {
5875         .name = "ecdump",
5876         .read = ecdump_read,
5877         .write = ecdump_write,
5878         .flags.experimental = 1,
5879 };
5880
5881 /*************************************************************************
5882  * Backlight/brightness subdriver
5883  */
5884
5885 #define TPACPI_BACKLIGHT_DEV_NAME "thinkpad_screen"
5886
5887 /*
5888  * ThinkPads can read brightness from two places: EC HBRV (0x31), or
5889  * CMOS NVRAM byte 0x5E, bits 0-3.
5890  *
5891  * EC HBRV (0x31) has the following layout
5892  *   Bit 7: unknown function
5893  *   Bit 6: unknown function
5894  *   Bit 5: Z: honour scale changes, NZ: ignore scale changes
5895  *   Bit 4: must be set to zero to avoid problems
5896  *   Bit 3-0: backlight brightness level
5897  *
5898  * brightness_get_raw returns status data in the HBRV layout
5899  *
5900  * WARNING: The X61 has been verified to use HBRV for something else, so
5901  * this should be used _only_ on IBM ThinkPads, and maybe with some careful
5902  * testing on the very early *60 Lenovo models...
5903  */
5904
5905 enum {
5906         TP_EC_BACKLIGHT = 0x31,
5907
5908         /* TP_EC_BACKLIGHT bitmasks */
5909         TP_EC_BACKLIGHT_LVLMSK = 0x1F,
5910         TP_EC_BACKLIGHT_CMDMSK = 0xE0,
5911         TP_EC_BACKLIGHT_MAPSW = 0x20,
5912 };
5913
5914 enum tpacpi_brightness_access_mode {
5915         TPACPI_BRGHT_MODE_AUTO = 0,     /* Not implemented yet */
5916         TPACPI_BRGHT_MODE_EC,           /* EC control */
5917         TPACPI_BRGHT_MODE_UCMS_STEP,    /* UCMS step-based control */
5918         TPACPI_BRGHT_MODE_ECNVRAM,      /* EC control w/ NVRAM store */
5919         TPACPI_BRGHT_MODE_MAX
5920 };
5921
5922 static struct backlight_device *ibm_backlight_device;
5923
5924 static enum tpacpi_brightness_access_mode brightness_mode =
5925                 TPACPI_BRGHT_MODE_MAX;
5926
5927 static unsigned int brightness_enable = 2; /* 2 = auto, 0 = no, 1 = yes */
5928
5929 static struct mutex brightness_mutex;
5930
5931 /* NVRAM brightness access,
5932  * call with brightness_mutex held! */
5933 static unsigned int tpacpi_brightness_nvram_get(void)
5934 {
5935         u8 lnvram;
5936
5937         lnvram = (nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS)
5938                   & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
5939                   >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
5940         lnvram &= (tp_features.bright_16levels) ? 0x0f : 0x07;
5941
5942         return lnvram;
5943 }
5944
5945 static void tpacpi_brightness_checkpoint_nvram(void)
5946 {
5947         u8 lec = 0;
5948         u8 b_nvram;
5949
5950         if (brightness_mode != TPACPI_BRGHT_MODE_ECNVRAM)
5951                 return;
5952
5953         vdbg_printk(TPACPI_DBG_BRGHT,
5954                 "trying to checkpoint backlight level to NVRAM...\n");
5955
5956         if (mutex_lock_killable(&brightness_mutex) < 0)
5957                 return;
5958
5959         if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
5960                 goto unlock;
5961         lec &= TP_EC_BACKLIGHT_LVLMSK;
5962         b_nvram = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS);
5963
5964         if (lec != ((b_nvram & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
5965                              >> TP_NVRAM_POS_LEVEL_BRIGHTNESS)) {
5966                 /* NVRAM needs update */
5967                 b_nvram &= ~(TP_NVRAM_MASK_LEVEL_BRIGHTNESS <<
5968                                 TP_NVRAM_POS_LEVEL_BRIGHTNESS);
5969                 b_nvram |= lec;
5970                 nvram_write_byte(b_nvram, TP_NVRAM_ADDR_BRIGHTNESS);
5971                 dbg_printk(TPACPI_DBG_BRGHT,
5972                            "updated NVRAM backlight level to %u (0x%02x)\n",
5973                            (unsigned int) lec, (unsigned int) b_nvram);
5974         } else
5975                 vdbg_printk(TPACPI_DBG_BRGHT,
5976                            "NVRAM backlight level already is %u (0x%02x)\n",
5977                            (unsigned int) lec, (unsigned int) b_nvram);
5978
5979 unlock:
5980         mutex_unlock(&brightness_mutex);
5981 }
5982
5983
5984 /* call with brightness_mutex held! */
5985 static int tpacpi_brightness_get_raw(int *status)
5986 {
5987         u8 lec = 0;
5988
5989         switch (brightness_mode) {
5990         case TPACPI_BRGHT_MODE_UCMS_STEP:
5991                 *status = tpacpi_brightness_nvram_get();
5992                 return 0;
5993         case TPACPI_BRGHT_MODE_EC:
5994         case TPACPI_BRGHT_MODE_ECNVRAM:
5995                 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
5996                         return -EIO;
5997                 *status = lec;
5998                 return 0;
5999         default:
6000                 return -ENXIO;
6001         }
6002 }
6003
6004 /* call with brightness_mutex held! */
6005 /* do NOT call with illegal backlight level value */
6006 static int tpacpi_brightness_set_ec(unsigned int value)
6007 {
6008         u8 lec = 0;
6009
6010         if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
6011                 return -EIO;
6012
6013         if (unlikely(!acpi_ec_write(TP_EC_BACKLIGHT,
6014                                 (lec & TP_EC_BACKLIGHT_CMDMSK) |
6015                                 (value & TP_EC_BACKLIGHT_LVLMSK))))
6016                 return -EIO;
6017
6018         return 0;
6019 }
6020
6021 /* call with brightness_mutex held! */
6022 static int tpacpi_brightness_set_ucmsstep(unsigned int value)
6023 {
6024         int cmos_cmd, inc;
6025         unsigned int current_value, i;
6026
6027         current_value = tpacpi_brightness_nvram_get();
6028
6029         if (value == current_value)
6030                 return 0;
6031
6032         cmos_cmd = (value > current_value) ?
6033                         TP_CMOS_BRIGHTNESS_UP :
6034                         TP_CMOS_BRIGHTNESS_DOWN;
6035         inc = (value > current_value) ? 1 : -1;
6036
6037         for (i = current_value; i != value; i += inc)
6038                 if (issue_thinkpad_cmos_command(cmos_cmd))
6039                         return -EIO;
6040
6041         return 0;
6042 }
6043
6044 /* May return EINTR which can always be mapped to ERESTARTSYS */
6045 static int brightness_set(unsigned int value)
6046 {
6047         int res;
6048
6049         if (value > ((tp_features.bright_16levels)? 15 : 7) ||
6050             value < 0)
6051                 return -EINVAL;
6052
6053         vdbg_printk(TPACPI_DBG_BRGHT,
6054                         "set backlight level to %d\n", value);
6055
6056         res = mutex_lock_killable(&brightness_mutex);
6057         if (res < 0)
6058                 return res;
6059
6060         switch (brightness_mode) {
6061         case TPACPI_BRGHT_MODE_EC:
6062         case TPACPI_BRGHT_MODE_ECNVRAM:
6063                 res = tpacpi_brightness_set_ec(value);
6064                 break;
6065         case TPACPI_BRGHT_MODE_UCMS_STEP:
6066                 res = tpacpi_brightness_set_ucmsstep(value);
6067                 break;
6068         default:
6069                 res = -ENXIO;
6070         }
6071
6072         mutex_unlock(&brightness_mutex);
6073         return res;
6074 }
6075
6076 /* sysfs backlight class ----------------------------------------------- */
6077
6078 static int brightness_update_status(struct backlight_device *bd)
6079 {
6080         unsigned int level =
6081                 (bd->props.fb_blank == FB_BLANK_UNBLANK &&
6082                  bd->props.power == FB_BLANK_UNBLANK) ?
6083                                 bd->props.brightness : 0;
6084
6085         dbg_printk(TPACPI_DBG_BRGHT,
6086                         "backlight: attempt to set level to %d\n",
6087                         level);
6088
6089         /* it is the backlight class's job (caller) to handle
6090          * EINTR and other errors properly */
6091         return brightness_set(level);
6092 }
6093
6094 static int brightness_get(struct backlight_device *bd)
6095 {
6096         int status, res;
6097
6098         res = mutex_lock_killable(&brightness_mutex);
6099         if (res < 0)
6100                 return 0;
6101
6102         res = tpacpi_brightness_get_raw(&status);
6103
6104         mutex_unlock(&brightness_mutex);
6105
6106         if (res < 0)
6107                 return 0;
6108
6109         return status & TP_EC_BACKLIGHT_LVLMSK;
6110 }
6111
6112 static void tpacpi_brightness_notify_change(void)
6113 {
6114         backlight_force_update(ibm_backlight_device,
6115                                BACKLIGHT_UPDATE_HOTKEY);
6116 }
6117
6118 static struct backlight_ops ibm_backlight_data = {
6119         .get_brightness = brightness_get,
6120         .update_status  = brightness_update_status,
6121 };
6122
6123 /* --------------------------------------------------------------------- */
6124
6125 /*
6126  * These are only useful for models that have only one possibility
6127  * of GPU.  If the BIOS model handles both ATI and Intel, don't use
6128  * these quirks.
6129  */
6130 #define TPACPI_BRGHT_Q_NOEC     0x0001  /* Must NOT use EC HBRV */
6131 #define TPACPI_BRGHT_Q_EC       0x0002  /* Should or must use EC HBRV */
6132 #define TPACPI_BRGHT_Q_ASK      0x8000  /* Ask for user report */
6133
6134 static const struct tpacpi_quirk brightness_quirk_table[] __initconst = {
6135         /* Models with ATI GPUs known to require ECNVRAM mode */
6136         TPACPI_Q_IBM('1', 'Y', TPACPI_BRGHT_Q_EC),      /* T43/p ATI */
6137
6138         /* Models with ATI GPUs that can use ECNVRAM */
6139         TPACPI_Q_IBM('1', 'R', TPACPI_BRGHT_Q_EC),
6140         TPACPI_Q_IBM('1', 'Q', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
6141         TPACPI_Q_IBM('7', '6', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
6142         TPACPI_Q_IBM('7', '8', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
6143
6144         /* Models with Intel Extreme Graphics 2 */
6145         TPACPI_Q_IBM('1', 'U', TPACPI_BRGHT_Q_NOEC),
6146         TPACPI_Q_IBM('1', 'V', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
6147         TPACPI_Q_IBM('1', 'W', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
6148
6149         /* Models with Intel GMA900 */
6150         TPACPI_Q_IBM('7', '0', TPACPI_BRGHT_Q_NOEC),    /* T43, R52 */
6151         TPACPI_Q_IBM('7', '4', TPACPI_BRGHT_Q_NOEC),    /* X41 */
6152         TPACPI_Q_IBM('7', '5', TPACPI_BRGHT_Q_NOEC),    /* X41 Tablet */
6153 };
6154
6155 static int __init brightness_init(struct ibm_init_struct *iibm)
6156 {
6157         int b;
6158         unsigned long quirks;
6159
6160         vdbg_printk(TPACPI_DBG_INIT, "initializing brightness subdriver\n");
6161
6162         mutex_init(&brightness_mutex);
6163
6164         quirks = tpacpi_check_quirks(brightness_quirk_table,
6165                                 ARRAY_SIZE(brightness_quirk_table));
6166
6167         /*
6168          * We always attempt to detect acpi support, so as to switch
6169          * Lenovo Vista BIOS to ACPI brightness mode even if we are not
6170          * going to publish a backlight interface
6171          */
6172         b = tpacpi_check_std_acpi_brightness_support();
6173         if (b > 0) {
6174
6175                 if (acpi_video_backlight_support()) {
6176                         if (brightness_enable > 1) {
6177                                 printk(TPACPI_NOTICE
6178                                        "Standard ACPI backlight interface "
6179                                        "available, not loading native one.\n");
6180                                 return 1;
6181                         } else if (brightness_enable == 1) {
6182                                 printk(TPACPI_NOTICE
6183                                        "Backlight control force enabled, even if standard "
6184                                        "ACPI backlight interface is available\n");
6185                         }
6186                 } else {
6187                         if (brightness_enable > 1) {
6188                                 printk(TPACPI_NOTICE
6189                                        "Standard ACPI backlight interface not "
6190                                        "available, thinkpad_acpi native "
6191                                        "brightness control enabled\n");
6192                         }
6193                 }
6194         }
6195
6196         if (!brightness_enable) {
6197                 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT,
6198                            "brightness support disabled by "
6199                            "module parameter\n");
6200                 return 1;
6201         }
6202
6203         if (b > 16) {
6204                 printk(TPACPI_ERR
6205                        "Unsupported brightness interface, "
6206                        "please contact %s\n", TPACPI_MAIL);
6207                 return 1;
6208         }
6209         if (b == 16)
6210                 tp_features.bright_16levels = 1;
6211
6212         /*
6213          * Check for module parameter bogosity, note that we
6214          * init brightness_mode to TPACPI_BRGHT_MODE_MAX in order to be
6215          * able to detect "unspecified"
6216          */
6217         if (brightness_mode > TPACPI_BRGHT_MODE_MAX)
6218                 return -EINVAL;
6219
6220         /* TPACPI_BRGHT_MODE_AUTO not implemented yet, just use default */
6221         if (brightness_mode == TPACPI_BRGHT_MODE_AUTO ||
6222             brightness_mode == TPACPI_BRGHT_MODE_MAX) {
6223                 if (quirks & TPACPI_BRGHT_Q_EC)
6224                         brightness_mode = TPACPI_BRGHT_MODE_ECNVRAM;
6225                 else
6226                         brightness_mode = TPACPI_BRGHT_MODE_UCMS_STEP;
6227
6228                 dbg_printk(TPACPI_DBG_BRGHT,
6229                            "driver auto-selected brightness_mode=%d\n",
6230                            brightness_mode);
6231         }
6232
6233         /* Safety */
6234         if (thinkpad_id.vendor != PCI_VENDOR_ID_IBM &&
6235             (brightness_mode == TPACPI_BRGHT_MODE_ECNVRAM ||
6236              brightness_mode == TPACPI_BRGHT_MODE_EC))
6237                 return -EINVAL;
6238
6239         if (tpacpi_brightness_get_raw(&b) < 0)
6240                 return 1;
6241
6242         if (tp_features.bright_16levels)
6243                 printk(TPACPI_INFO
6244                        "detected a 16-level brightness capable ThinkPad\n");
6245
6246         ibm_backlight_device = backlight_device_register(
6247                                         TPACPI_BACKLIGHT_DEV_NAME, NULL, NULL,
6248                                         &ibm_backlight_data);
6249         if (IS_ERR(ibm_backlight_device)) {
6250                 int rc = PTR_ERR(ibm_backlight_device);
6251                 ibm_backlight_device = NULL;
6252                 printk(TPACPI_ERR "Could not register backlight device\n");
6253                 return rc;
6254         }
6255         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT,
6256                         "brightness is supported\n");
6257
6258         if (quirks & TPACPI_BRGHT_Q_ASK) {
6259                 printk(TPACPI_NOTICE
6260                         "brightness: will use unverified default: "
6261                         "brightness_mode=%d\n", brightness_mode);
6262                 printk(TPACPI_NOTICE
6263              &nb