eb603f1d55ca4ba0ecf4f2fa685cc7364142a740
[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         *value = simple_strtoul(skip_spaces(buf), &endp, 0);
1022         endp = skip_spaces(endp);
1023         if (*endp || *value > max)
1024                 return -EINVAL;
1025
1026         return 0;
1027 }
1028
1029 static void tpacpi_disable_brightness_delay(void)
1030 {
1031         if (acpi_evalf(hkey_handle, NULL, "PWMS", "qvd", 0))
1032                 printk(TPACPI_NOTICE
1033                         "ACPI backlight control delay disabled\n");
1034 }
1035
1036 static int __init tpacpi_query_bcl_levels(acpi_handle handle)
1037 {
1038         struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
1039         union acpi_object *obj;
1040         int rc;
1041
1042         if (ACPI_SUCCESS(acpi_evaluate_object(handle, NULL, NULL, &buffer))) {
1043                 obj = (union acpi_object *)buffer.pointer;
1044                 if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) {
1045                         printk(TPACPI_ERR "Unknown _BCL data, "
1046                                "please report this to %s\n", TPACPI_MAIL);
1047                         rc = 0;
1048                 } else {
1049                         rc = obj->package.count;
1050                 }
1051         } else {
1052                 return 0;
1053         }
1054
1055         kfree(buffer.pointer);
1056         return rc;
1057 }
1058
1059 static acpi_status __init tpacpi_acpi_walk_find_bcl(acpi_handle handle,
1060                                         u32 lvl, void *context, void **rv)
1061 {
1062         char name[ACPI_PATH_SEGMENT_LENGTH];
1063         struct acpi_buffer buffer = { sizeof(name), &name };
1064
1065         if (ACPI_SUCCESS(acpi_get_name(handle, ACPI_SINGLE_NAME, &buffer)) &&
1066             !strncmp("_BCL", name, sizeof(name) - 1)) {
1067                 BUG_ON(!rv || !*rv);
1068                 **(int **)rv = tpacpi_query_bcl_levels(handle);
1069                 return AE_CTRL_TERMINATE;
1070         } else {
1071                 return AE_OK;
1072         }
1073 }
1074
1075 /*
1076  * Returns 0 (no ACPI _BCL or _BCL invalid), or size of brightness map
1077  */
1078 static int __init tpacpi_check_std_acpi_brightness_support(void)
1079 {
1080         int status;
1081         int bcl_levels = 0;
1082         void *bcl_ptr = &bcl_levels;
1083
1084         if (!vid_handle) {
1085                 TPACPI_ACPIHANDLE_INIT(vid);
1086         }
1087         if (!vid_handle)
1088                 return 0;
1089
1090         /*
1091          * Search for a _BCL method, and execute it.  This is safe on all
1092          * ThinkPads, and as a side-effect, _BCL will place a Lenovo Vista
1093          * BIOS in ACPI backlight control mode.  We do NOT have to care
1094          * about calling the _BCL method in an enabled video device, any
1095          * will do for our purposes.
1096          */
1097
1098         status = acpi_walk_namespace(ACPI_TYPE_METHOD, vid_handle, 3,
1099                                      tpacpi_acpi_walk_find_bcl, NULL, NULL,
1100                                      &bcl_ptr);
1101
1102         if (ACPI_SUCCESS(status) && bcl_levels > 2) {
1103                 tp_features.bright_acpimode = 1;
1104                 return (bcl_levels - 2);
1105         }
1106
1107         return 0;
1108 }
1109
1110 static void printk_deprecated_attribute(const char * const what,
1111                                         const char * const details)
1112 {
1113         tpacpi_log_usertask("deprecated sysfs attribute");
1114         printk(TPACPI_WARN "WARNING: sysfs attribute %s is deprecated and "
1115                 "will be removed. %s\n",
1116                 what, details);
1117 }
1118
1119 /*************************************************************************
1120  * rfkill and radio control support helpers
1121  */
1122
1123 /*
1124  * ThinkPad-ACPI firmware handling model:
1125  *
1126  * WLSW (master wireless switch) is event-driven, and is common to all
1127  * firmware-controlled radios.  It cannot be controlled, just monitored,
1128  * as expected.  It overrides all radio state in firmware
1129  *
1130  * The kernel, a masked-off hotkey, and WLSW can change the radio state
1131  * (TODO: verify how WLSW interacts with the returned radio state).
1132  *
1133  * The only time there are shadow radio state changes, is when
1134  * masked-off hotkeys are used.
1135  */
1136
1137 /*
1138  * Internal driver API for radio state:
1139  *
1140  * int: < 0 = error, otherwise enum tpacpi_rfkill_state
1141  * bool: true means radio blocked (off)
1142  */
1143 enum tpacpi_rfkill_state {
1144         TPACPI_RFK_RADIO_OFF = 0,
1145         TPACPI_RFK_RADIO_ON
1146 };
1147
1148 /* rfkill switches */
1149 enum tpacpi_rfk_id {
1150         TPACPI_RFK_BLUETOOTH_SW_ID = 0,
1151         TPACPI_RFK_WWAN_SW_ID,
1152         TPACPI_RFK_UWB_SW_ID,
1153         TPACPI_RFK_SW_MAX
1154 };
1155
1156 static const char *tpacpi_rfkill_names[] = {
1157         [TPACPI_RFK_BLUETOOTH_SW_ID] = "bluetooth",
1158         [TPACPI_RFK_WWAN_SW_ID] = "wwan",
1159         [TPACPI_RFK_UWB_SW_ID] = "uwb",
1160         [TPACPI_RFK_SW_MAX] = NULL
1161 };
1162
1163 /* ThinkPad-ACPI rfkill subdriver */
1164 struct tpacpi_rfk {
1165         struct rfkill *rfkill;
1166         enum tpacpi_rfk_id id;
1167         const struct tpacpi_rfk_ops *ops;
1168 };
1169
1170 struct tpacpi_rfk_ops {
1171         /* firmware interface */
1172         int (*get_status)(void);
1173         int (*set_status)(const enum tpacpi_rfkill_state);
1174 };
1175
1176 static struct tpacpi_rfk *tpacpi_rfkill_switches[TPACPI_RFK_SW_MAX];
1177
1178 /* Query FW and update rfkill sw state for a given rfkill switch */
1179 static int tpacpi_rfk_update_swstate(const struct tpacpi_rfk *tp_rfk)
1180 {
1181         int status;
1182
1183         if (!tp_rfk)
1184                 return -ENODEV;
1185
1186         status = (tp_rfk->ops->get_status)();
1187         if (status < 0)
1188                 return status;
1189
1190         rfkill_set_sw_state(tp_rfk->rfkill,
1191                             (status == TPACPI_RFK_RADIO_OFF));
1192
1193         return status;
1194 }
1195
1196 /* Query FW and update rfkill sw state for all rfkill switches */
1197 static void tpacpi_rfk_update_swstate_all(void)
1198 {
1199         unsigned int i;
1200
1201         for (i = 0; i < TPACPI_RFK_SW_MAX; i++)
1202                 tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[i]);
1203 }
1204
1205 /*
1206  * Sync the HW-blocking state of all rfkill switches,
1207  * do notice it causes the rfkill core to schedule uevents
1208  */
1209 static void tpacpi_rfk_update_hwblock_state(bool blocked)
1210 {
1211         unsigned int i;
1212         struct tpacpi_rfk *tp_rfk;
1213
1214         for (i = 0; i < TPACPI_RFK_SW_MAX; i++) {
1215                 tp_rfk = tpacpi_rfkill_switches[i];
1216                 if (tp_rfk) {
1217                         if (rfkill_set_hw_state(tp_rfk->rfkill,
1218                                                 blocked)) {
1219                                 /* ignore -- we track sw block */
1220                         }
1221                 }
1222         }
1223 }
1224
1225 /* Call to get the WLSW state from the firmware */
1226 static int hotkey_get_wlsw(void);
1227
1228 /* Call to query WLSW state and update all rfkill switches */
1229 static bool tpacpi_rfk_check_hwblock_state(void)
1230 {
1231         int res = hotkey_get_wlsw();
1232         int hw_blocked;
1233
1234         /* When unknown or unsupported, we have to assume it is unblocked */
1235         if (res < 0)
1236                 return false;
1237
1238         hw_blocked = (res == TPACPI_RFK_RADIO_OFF);
1239         tpacpi_rfk_update_hwblock_state(hw_blocked);
1240
1241         return hw_blocked;
1242 }
1243
1244 static int tpacpi_rfk_hook_set_block(void *data, bool blocked)
1245 {
1246         struct tpacpi_rfk *tp_rfk = data;
1247         int res;
1248
1249         dbg_printk(TPACPI_DBG_RFKILL,
1250                    "request to change radio state to %s\n",
1251                    blocked ? "blocked" : "unblocked");
1252
1253         /* try to set radio state */
1254         res = (tp_rfk->ops->set_status)(blocked ?
1255                                 TPACPI_RFK_RADIO_OFF : TPACPI_RFK_RADIO_ON);
1256
1257         /* and update the rfkill core with whatever the FW really did */
1258         tpacpi_rfk_update_swstate(tp_rfk);
1259
1260         return (res < 0) ? res : 0;
1261 }
1262
1263 static const struct rfkill_ops tpacpi_rfk_rfkill_ops = {
1264         .set_block = tpacpi_rfk_hook_set_block,
1265 };
1266
1267 static int __init tpacpi_new_rfkill(const enum tpacpi_rfk_id id,
1268                         const struct tpacpi_rfk_ops *tp_rfkops,
1269                         const enum rfkill_type rfktype,
1270                         const char *name,
1271                         const bool set_default)
1272 {
1273         struct tpacpi_rfk *atp_rfk;
1274         int res;
1275         bool sw_state = false;
1276         bool hw_state;
1277         int sw_status;
1278
1279         BUG_ON(id >= TPACPI_RFK_SW_MAX || tpacpi_rfkill_switches[id]);
1280
1281         atp_rfk = kzalloc(sizeof(struct tpacpi_rfk), GFP_KERNEL);
1282         if (atp_rfk)
1283                 atp_rfk->rfkill = rfkill_alloc(name,
1284                                                 &tpacpi_pdev->dev,
1285                                                 rfktype,
1286                                                 &tpacpi_rfk_rfkill_ops,
1287                                                 atp_rfk);
1288         if (!atp_rfk || !atp_rfk->rfkill) {
1289                 printk(TPACPI_ERR
1290                         "failed to allocate memory for rfkill class\n");
1291                 kfree(atp_rfk);
1292                 return -ENOMEM;
1293         }
1294
1295         atp_rfk->id = id;
1296         atp_rfk->ops = tp_rfkops;
1297
1298         sw_status = (tp_rfkops->get_status)();
1299         if (sw_status < 0) {
1300                 printk(TPACPI_ERR
1301                         "failed to read initial state for %s, error %d\n",
1302                         name, sw_status);
1303         } else {
1304                 sw_state = (sw_status == TPACPI_RFK_RADIO_OFF);
1305                 if (set_default) {
1306                         /* try to keep the initial state, since we ask the
1307                          * firmware to preserve it across S5 in NVRAM */
1308                         rfkill_init_sw_state(atp_rfk->rfkill, sw_state);
1309                 }
1310         }
1311         hw_state = tpacpi_rfk_check_hwblock_state();
1312         rfkill_set_hw_state(atp_rfk->rfkill, hw_state);
1313
1314         res = rfkill_register(atp_rfk->rfkill);
1315         if (res < 0) {
1316                 printk(TPACPI_ERR
1317                         "failed to register %s rfkill switch: %d\n",
1318                         name, res);
1319                 rfkill_destroy(atp_rfk->rfkill);
1320                 kfree(atp_rfk);
1321                 return res;
1322         }
1323
1324         tpacpi_rfkill_switches[id] = atp_rfk;
1325
1326         printk(TPACPI_INFO "rfkill switch %s: radio is %sblocked\n",
1327                 name, (sw_state || hw_state) ? "" : "un");
1328         return 0;
1329 }
1330
1331 static void tpacpi_destroy_rfkill(const enum tpacpi_rfk_id id)
1332 {
1333         struct tpacpi_rfk *tp_rfk;
1334
1335         BUG_ON(id >= TPACPI_RFK_SW_MAX);
1336
1337         tp_rfk = tpacpi_rfkill_switches[id];
1338         if (tp_rfk) {
1339                 rfkill_unregister(tp_rfk->rfkill);
1340                 rfkill_destroy(tp_rfk->rfkill);
1341                 tpacpi_rfkill_switches[id] = NULL;
1342                 kfree(tp_rfk);
1343         }
1344 }
1345
1346 static void printk_deprecated_rfkill_attribute(const char * const what)
1347 {
1348         printk_deprecated_attribute(what,
1349                         "Please switch to generic rfkill before year 2010");
1350 }
1351
1352 /* sysfs <radio> enable ------------------------------------------------ */
1353 static ssize_t tpacpi_rfk_sysfs_enable_show(const enum tpacpi_rfk_id id,
1354                                             struct device_attribute *attr,
1355                                             char *buf)
1356 {
1357         int status;
1358
1359         printk_deprecated_rfkill_attribute(attr->attr.name);
1360
1361         /* This is in the ABI... */
1362         if (tpacpi_rfk_check_hwblock_state()) {
1363                 status = TPACPI_RFK_RADIO_OFF;
1364         } else {
1365                 status = tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]);
1366                 if (status < 0)
1367                         return status;
1368         }
1369
1370         return snprintf(buf, PAGE_SIZE, "%d\n",
1371                         (status == TPACPI_RFK_RADIO_ON) ? 1 : 0);
1372 }
1373
1374 static ssize_t tpacpi_rfk_sysfs_enable_store(const enum tpacpi_rfk_id id,
1375                             struct device_attribute *attr,
1376                             const char *buf, size_t count)
1377 {
1378         unsigned long t;
1379         int res;
1380
1381         printk_deprecated_rfkill_attribute(attr->attr.name);
1382
1383         if (parse_strtoul(buf, 1, &t))
1384                 return -EINVAL;
1385
1386         tpacpi_disclose_usertask(attr->attr.name, "set to %ld\n", t);
1387
1388         /* This is in the ABI... */
1389         if (tpacpi_rfk_check_hwblock_state() && !!t)
1390                 return -EPERM;
1391
1392         res = tpacpi_rfkill_switches[id]->ops->set_status((!!t) ?
1393                                 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF);
1394         tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]);
1395
1396         return (res < 0) ? res : count;
1397 }
1398
1399 /* procfs -------------------------------------------------------------- */
1400 static int tpacpi_rfk_procfs_read(const enum tpacpi_rfk_id id, struct seq_file *m)
1401 {
1402         if (id >= TPACPI_RFK_SW_MAX)
1403                 seq_printf(m, "status:\t\tnot supported\n");
1404         else {
1405                 int status;
1406
1407                 /* This is in the ABI... */
1408                 if (tpacpi_rfk_check_hwblock_state()) {
1409                         status = TPACPI_RFK_RADIO_OFF;
1410                 } else {
1411                         status = tpacpi_rfk_update_swstate(
1412                                                 tpacpi_rfkill_switches[id]);
1413                         if (status < 0)
1414                                 return status;
1415                 }
1416
1417                 seq_printf(m, "status:\t\t%s\n",
1418                                 (status == TPACPI_RFK_RADIO_ON) ?
1419                                         "enabled" : "disabled");
1420                 seq_printf(m, "commands:\tenable, disable\n");
1421         }
1422
1423         return 0;
1424 }
1425
1426 static int tpacpi_rfk_procfs_write(const enum tpacpi_rfk_id id, char *buf)
1427 {
1428         char *cmd;
1429         int status = -1;
1430         int res = 0;
1431
1432         if (id >= TPACPI_RFK_SW_MAX)
1433                 return -ENODEV;
1434
1435         while ((cmd = next_cmd(&buf))) {
1436                 if (strlencmp(cmd, "enable") == 0)
1437                         status = TPACPI_RFK_RADIO_ON;
1438                 else if (strlencmp(cmd, "disable") == 0)
1439                         status = TPACPI_RFK_RADIO_OFF;
1440                 else
1441                         return -EINVAL;
1442         }
1443
1444         if (status != -1) {
1445                 tpacpi_disclose_usertask("procfs", "attempt to %s %s\n",
1446                                 (status == TPACPI_RFK_RADIO_ON) ?
1447                                                 "enable" : "disable",
1448                                 tpacpi_rfkill_names[id]);
1449                 res = (tpacpi_rfkill_switches[id]->ops->set_status)(status);
1450                 tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]);
1451         }
1452
1453         return res;
1454 }
1455
1456 /*************************************************************************
1457  * thinkpad-acpi driver attributes
1458  */
1459
1460 /* interface_version --------------------------------------------------- */
1461 static ssize_t tpacpi_driver_interface_version_show(
1462                                 struct device_driver *drv,
1463                                 char *buf)
1464 {
1465         return snprintf(buf, PAGE_SIZE, "0x%08x\n", TPACPI_SYSFS_VERSION);
1466 }
1467
1468 static DRIVER_ATTR(interface_version, S_IRUGO,
1469                 tpacpi_driver_interface_version_show, NULL);
1470
1471 /* debug_level --------------------------------------------------------- */
1472 static ssize_t tpacpi_driver_debug_show(struct device_driver *drv,
1473                                                 char *buf)
1474 {
1475         return snprintf(buf, PAGE_SIZE, "0x%04x\n", dbg_level);
1476 }
1477
1478 static ssize_t tpacpi_driver_debug_store(struct device_driver *drv,
1479                                                 const char *buf, size_t count)
1480 {
1481         unsigned long t;
1482
1483         if (parse_strtoul(buf, 0xffff, &t))
1484                 return -EINVAL;
1485
1486         dbg_level = t;
1487
1488         return count;
1489 }
1490
1491 static DRIVER_ATTR(debug_level, S_IWUSR | S_IRUGO,
1492                 tpacpi_driver_debug_show, tpacpi_driver_debug_store);
1493
1494 /* version ------------------------------------------------------------- */
1495 static ssize_t tpacpi_driver_version_show(struct device_driver *drv,
1496                                                 char *buf)
1497 {
1498         return snprintf(buf, PAGE_SIZE, "%s v%s\n",
1499                         TPACPI_DESC, TPACPI_VERSION);
1500 }
1501
1502 static DRIVER_ATTR(version, S_IRUGO,
1503                 tpacpi_driver_version_show, NULL);
1504
1505 /* --------------------------------------------------------------------- */
1506
1507 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
1508
1509 /* wlsw_emulstate ------------------------------------------------------ */
1510 static ssize_t tpacpi_driver_wlsw_emulstate_show(struct device_driver *drv,
1511                                                 char *buf)
1512 {
1513         return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_wlsw_emulstate);
1514 }
1515
1516 static ssize_t tpacpi_driver_wlsw_emulstate_store(struct device_driver *drv,
1517                                                 const char *buf, size_t count)
1518 {
1519         unsigned long t;
1520
1521         if (parse_strtoul(buf, 1, &t))
1522                 return -EINVAL;
1523
1524         if (tpacpi_wlsw_emulstate != !!t) {
1525                 tpacpi_wlsw_emulstate = !!t;
1526                 tpacpi_rfk_update_hwblock_state(!t);    /* negative logic */
1527         }
1528
1529         return count;
1530 }
1531
1532 static DRIVER_ATTR(wlsw_emulstate, S_IWUSR | S_IRUGO,
1533                 tpacpi_driver_wlsw_emulstate_show,
1534                 tpacpi_driver_wlsw_emulstate_store);
1535
1536 /* bluetooth_emulstate ------------------------------------------------- */
1537 static ssize_t tpacpi_driver_bluetooth_emulstate_show(
1538                                         struct device_driver *drv,
1539                                         char *buf)
1540 {
1541         return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_bluetooth_emulstate);
1542 }
1543
1544 static ssize_t tpacpi_driver_bluetooth_emulstate_store(
1545                                         struct device_driver *drv,
1546                                         const char *buf, size_t count)
1547 {
1548         unsigned long t;
1549
1550         if (parse_strtoul(buf, 1, &t))
1551                 return -EINVAL;
1552
1553         tpacpi_bluetooth_emulstate = !!t;
1554
1555         return count;
1556 }
1557
1558 static DRIVER_ATTR(bluetooth_emulstate, S_IWUSR | S_IRUGO,
1559                 tpacpi_driver_bluetooth_emulstate_show,
1560                 tpacpi_driver_bluetooth_emulstate_store);
1561
1562 /* wwan_emulstate ------------------------------------------------- */
1563 static ssize_t tpacpi_driver_wwan_emulstate_show(
1564                                         struct device_driver *drv,
1565                                         char *buf)
1566 {
1567         return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_wwan_emulstate);
1568 }
1569
1570 static ssize_t tpacpi_driver_wwan_emulstate_store(
1571                                         struct device_driver *drv,
1572                                         const char *buf, size_t count)
1573 {
1574         unsigned long t;
1575
1576         if (parse_strtoul(buf, 1, &t))
1577                 return -EINVAL;
1578
1579         tpacpi_wwan_emulstate = !!t;
1580
1581         return count;
1582 }
1583
1584 static DRIVER_ATTR(wwan_emulstate, S_IWUSR | S_IRUGO,
1585                 tpacpi_driver_wwan_emulstate_show,
1586                 tpacpi_driver_wwan_emulstate_store);
1587
1588 /* uwb_emulstate ------------------------------------------------- */
1589 static ssize_t tpacpi_driver_uwb_emulstate_show(
1590                                         struct device_driver *drv,
1591                                         char *buf)
1592 {
1593         return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_uwb_emulstate);
1594 }
1595
1596 static ssize_t tpacpi_driver_uwb_emulstate_store(
1597                                         struct device_driver *drv,
1598                                         const char *buf, size_t count)
1599 {
1600         unsigned long t;
1601
1602         if (parse_strtoul(buf, 1, &t))
1603                 return -EINVAL;
1604
1605         tpacpi_uwb_emulstate = !!t;
1606
1607         return count;
1608 }
1609
1610 static DRIVER_ATTR(uwb_emulstate, S_IWUSR | S_IRUGO,
1611                 tpacpi_driver_uwb_emulstate_show,
1612                 tpacpi_driver_uwb_emulstate_store);
1613 #endif
1614
1615 /* --------------------------------------------------------------------- */
1616
1617 static struct driver_attribute *tpacpi_driver_attributes[] = {
1618         &driver_attr_debug_level, &driver_attr_version,
1619         &driver_attr_interface_version,
1620 };
1621
1622 static int __init tpacpi_create_driver_attributes(struct device_driver *drv)
1623 {
1624         int i, res;
1625
1626         i = 0;
1627         res = 0;
1628         while (!res && i < ARRAY_SIZE(tpacpi_driver_attributes)) {
1629                 res = driver_create_file(drv, tpacpi_driver_attributes[i]);
1630                 i++;
1631         }
1632
1633 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
1634         if (!res && dbg_wlswemul)
1635                 res = driver_create_file(drv, &driver_attr_wlsw_emulstate);
1636         if (!res && dbg_bluetoothemul)
1637                 res = driver_create_file(drv, &driver_attr_bluetooth_emulstate);
1638         if (!res && dbg_wwanemul)
1639                 res = driver_create_file(drv, &driver_attr_wwan_emulstate);
1640         if (!res && dbg_uwbemul)
1641                 res = driver_create_file(drv, &driver_attr_uwb_emulstate);
1642 #endif
1643
1644         return res;
1645 }
1646
1647 static void tpacpi_remove_driver_attributes(struct device_driver *drv)
1648 {
1649         int i;
1650
1651         for (i = 0; i < ARRAY_SIZE(tpacpi_driver_attributes); i++)
1652                 driver_remove_file(drv, tpacpi_driver_attributes[i]);
1653
1654 #ifdef THINKPAD_ACPI_DEBUGFACILITIES
1655         driver_remove_file(drv, &driver_attr_wlsw_emulstate);
1656         driver_remove_file(drv, &driver_attr_bluetooth_emulstate);
1657         driver_remove_file(drv, &driver_attr_wwan_emulstate);
1658         driver_remove_file(drv, &driver_attr_uwb_emulstate);
1659 #endif
1660 }
1661
1662 /*************************************************************************
1663  * Firmware Data
1664  */
1665
1666 /*
1667  * Table of recommended minimum BIOS versions
1668  *
1669  * Reasons for listing:
1670  *    1. Stable BIOS, listed because the unknown ammount of
1671  *       bugs and bad ACPI behaviour on older versions
1672  *
1673  *    2. BIOS or EC fw with known bugs that trigger on Linux
1674  *
1675  *    3. BIOS with known reduced functionality in older versions
1676  *
1677  *  We recommend the latest BIOS and EC version.
1678  *  We only support the latest BIOS and EC fw version as a rule.
1679  *
1680  *  Sources: IBM ThinkPad Public Web Documents (update changelogs),
1681  *  Information from users in ThinkWiki
1682  *
1683  *  WARNING: we use this table also to detect that the machine is
1684  *  a ThinkPad in some cases, so don't remove entries lightly.
1685  */
1686
1687 #define TPV_Q(__v, __id1, __id2, __bv1, __bv2)          \
1688         { .vendor       = (__v),                        \
1689           .bios         = TPID(__id1, __id2),           \
1690           .ec           = TPACPI_MATCH_ANY,             \
1691           .quirks       = TPACPI_MATCH_ANY << 16        \
1692                           | (__bv1) << 8 | (__bv2) }
1693
1694 #define TPV_Q_X(__v, __bid1, __bid2, __bv1, __bv2,      \
1695                 __eid, __ev1, __ev2)                    \
1696         { .vendor       = (__v),                        \
1697           .bios         = TPID(__bid1, __bid2),         \
1698           .ec           = __eid,                        \
1699           .quirks       = (__ev1) << 24 | (__ev2) << 16 \
1700                           | (__bv1) << 8 | (__bv2) }
1701
1702 #define TPV_QI0(__id1, __id2, __bv1, __bv2) \
1703         TPV_Q(PCI_VENDOR_ID_IBM, __id1, __id2, __bv1, __bv2)
1704
1705 /* Outdated IBM BIOSes often lack the EC id string */
1706 #define TPV_QI1(__id1, __id2, __bv1, __bv2, __ev1, __ev2) \
1707         TPV_Q_X(PCI_VENDOR_ID_IBM, __id1, __id2,        \
1708                 __bv1, __bv2, TPID(__id1, __id2),       \
1709                 __ev1, __ev2),                          \
1710         TPV_Q_X(PCI_VENDOR_ID_IBM, __id1, __id2,        \
1711                 __bv1, __bv2, TPACPI_MATCH_UNKNOWN,     \
1712                 __ev1, __ev2)
1713
1714 /* Outdated IBM BIOSes often lack the EC id string */
1715 #define TPV_QI2(__bid1, __bid2, __bv1, __bv2,           \
1716                 __eid1, __eid2, __ev1, __ev2)           \
1717         TPV_Q_X(PCI_VENDOR_ID_IBM, __bid1, __bid2,      \
1718                 __bv1, __bv2, TPID(__eid1, __eid2),     \
1719                 __ev1, __ev2),                          \
1720         TPV_Q_X(PCI_VENDOR_ID_IBM, __bid1, __bid2,      \
1721                 __bv1, __bv2, TPACPI_MATCH_UNKNOWN,     \
1722                 __ev1, __ev2)
1723
1724 #define TPV_QL0(__id1, __id2, __bv1, __bv2) \
1725         TPV_Q(PCI_VENDOR_ID_LENOVO, __id1, __id2, __bv1, __bv2)
1726
1727 #define TPV_QL1(__id1, __id2, __bv1, __bv2, __ev1, __ev2) \
1728         TPV_Q_X(PCI_VENDOR_ID_LENOVO, __id1, __id2,     \
1729                 __bv1, __bv2, TPID(__id1, __id2),       \
1730                 __ev1, __ev2)
1731
1732 #define TPV_QL2(__bid1, __bid2, __bv1, __bv2,           \
1733                 __eid1, __eid2, __ev1, __ev2)           \
1734         TPV_Q_X(PCI_VENDOR_ID_LENOVO, __bid1, __bid2,   \
1735                 __bv1, __bv2, TPID(__eid1, __eid2),     \
1736                 __ev1, __ev2)
1737
1738 static const struct tpacpi_quirk tpacpi_bios_version_qtable[] __initconst = {
1739         /*  Numeric models ------------------ */
1740         /*      FW MODEL   BIOS VERS          */
1741         TPV_QI0('I', 'M',  '6', '5'),            /* 570 */
1742         TPV_QI0('I', 'U',  '2', '6'),            /* 570E */
1743         TPV_QI0('I', 'B',  '5', '4'),            /* 600 */
1744         TPV_QI0('I', 'H',  '4', '7'),            /* 600E */
1745         TPV_QI0('I', 'N',  '3', '6'),            /* 600E */
1746         TPV_QI0('I', 'T',  '5', '5'),            /* 600X */
1747         TPV_QI0('I', 'D',  '4', '8'),            /* 770, 770E, 770ED */
1748         TPV_QI0('I', 'I',  '4', '2'),            /* 770X */
1749         TPV_QI0('I', 'O',  '2', '3'),            /* 770Z */
1750
1751         /* A-series ------------------------- */
1752         /*      FW MODEL   BIOS VERS  EC VERS */
1753         TPV_QI0('I', 'W',  '5', '9'),            /* A20m */
1754         TPV_QI0('I', 'V',  '6', '9'),            /* A20p */
1755         TPV_QI0('1', '0',  '2', '6'),            /* A21e, A22e */
1756         TPV_QI0('K', 'U',  '3', '6'),            /* A21e */
1757         TPV_QI0('K', 'X',  '3', '6'),            /* A21m, A22m */
1758         TPV_QI0('K', 'Y',  '3', '8'),            /* A21p, A22p */
1759         TPV_QI0('1', 'B',  '1', '7'),            /* A22e */
1760         TPV_QI0('1', '3',  '2', '0'),            /* A22m */
1761         TPV_QI0('1', 'E',  '7', '3'),            /* A30/p (0) */
1762         TPV_QI1('1', 'G',  '4', '1',  '1', '7'), /* A31/p (0) */
1763         TPV_QI1('1', 'N',  '1', '6',  '0', '7'), /* A31/p (0) */
1764
1765         /* G-series ------------------------- */
1766         /*      FW MODEL   BIOS VERS          */
1767         TPV_QI0('1', 'T',  'A', '6'),            /* G40 */
1768         TPV_QI0('1', 'X',  '5', '7'),            /* G41 */
1769
1770         /* R-series, T-series --------------- */
1771         /*      FW MODEL   BIOS VERS  EC VERS */
1772         TPV_QI0('1', 'C',  'F', '0'),            /* R30 */
1773         TPV_QI0('1', 'F',  'F', '1'),            /* R31 */
1774         TPV_QI0('1', 'M',  '9', '7'),            /* R32 */
1775         TPV_QI0('1', 'O',  '6', '1'),            /* R40 */
1776         TPV_QI0('1', 'P',  '6', '5'),            /* R40 */
1777         TPV_QI0('1', 'S',  '7', '0'),            /* R40e */
1778         TPV_QI1('1', 'R',  'D', 'R',  '7', '1'), /* R50/p, R51,
1779                                                     T40/p, T41/p, T42/p (1) */
1780         TPV_QI1('1', 'V',  '7', '1',  '2', '8'), /* R50e, R51 (1) */
1781         TPV_QI1('7', '8',  '7', '1',  '0', '6'), /* R51e (1) */
1782         TPV_QI1('7', '6',  '6', '9',  '1', '6'), /* R52 (1) */
1783         TPV_QI1('7', '0',  '6', '9',  '2', '8'), /* R52, T43 (1) */
1784
1785         TPV_QI0('I', 'Y',  '6', '1'),            /* T20 */
1786         TPV_QI0('K', 'Z',  '3', '4'),            /* T21 */
1787         TPV_QI0('1', '6',  '3', '2'),            /* T22 */
1788         TPV_QI1('1', 'A',  '6', '4',  '2', '3'), /* T23 (0) */
1789         TPV_QI1('1', 'I',  '7', '1',  '2', '0'), /* T30 (0) */
1790         TPV_QI1('1', 'Y',  '6', '5',  '2', '9'), /* T43/p (1) */
1791
1792         TPV_QL1('7', '9',  'E', '3',  '5', '0'), /* T60/p */
1793         TPV_QL1('7', 'C',  'D', '2',  '2', '2'), /* R60, R60i */
1794         TPV_QL1('7', 'E',  'D', '0',  '1', '5'), /* R60e, R60i */
1795
1796         /*      BIOS FW    BIOS VERS  EC FW     EC VERS */
1797         TPV_QI2('1', 'W',  '9', '0',  '1', 'V', '2', '8'), /* R50e (1) */
1798         TPV_QL2('7', 'I',  '3', '4',  '7', '9', '5', '0'), /* T60/p wide */
1799
1800         /* X-series ------------------------- */
1801         /*      FW MODEL   BIOS VERS  EC VERS */
1802         TPV_QI0('I', 'Z',  '9', 'D'),            /* X20, X21 */
1803         TPV_QI0('1', 'D',  '7', '0'),            /* X22, X23, X24 */
1804         TPV_QI1('1', 'K',  '4', '8',  '1', '8'), /* X30 (0) */
1805         TPV_QI1('1', 'Q',  '9', '7',  '2', '3'), /* X31, X32 (0) */
1806         TPV_QI1('1', 'U',  'D', '3',  'B', '2'), /* X40 (0) */
1807         TPV_QI1('7', '4',  '6', '4',  '2', '7'), /* X41 (0) */
1808         TPV_QI1('7', '5',  '6', '0',  '2', '0'), /* X41t (0) */
1809
1810         TPV_QL1('7', 'B',  'D', '7',  '4', '0'), /* X60/s */
1811         TPV_QL1('7', 'J',  '3', '0',  '1', '3'), /* X60t */
1812
1813         /* (0) - older versions lack DMI EC fw string and functionality */
1814         /* (1) - older versions known to lack functionality */
1815 };
1816
1817 #undef TPV_QL1
1818 #undef TPV_QL0
1819 #undef TPV_QI2
1820 #undef TPV_QI1
1821 #undef TPV_QI0
1822 #undef TPV_Q_X
1823 #undef TPV_Q
1824
1825 static void __init tpacpi_check_outdated_fw(void)
1826 {
1827         unsigned long fwvers;
1828         u16 ec_version, bios_version;
1829
1830         fwvers = tpacpi_check_quirks(tpacpi_bios_version_qtable,
1831                                 ARRAY_SIZE(tpacpi_bios_version_qtable));
1832
1833         if (!fwvers)
1834                 return;
1835
1836         bios_version = fwvers & 0xffffU;
1837         ec_version = (fwvers >> 16) & 0xffffU;
1838
1839         /* note that unknown versions are set to 0x0000 and we use that */
1840         if ((bios_version > thinkpad_id.bios_release) ||
1841             (ec_version > thinkpad_id.ec_release &&
1842                                 ec_version != TPACPI_MATCH_ANY)) {
1843                 /*
1844                  * The changelogs would let us track down the exact
1845                  * reason, but it is just too much of a pain to track
1846                  * it.  We only list BIOSes that are either really
1847                  * broken, or really stable to begin with, so it is
1848                  * best if the user upgrades the firmware anyway.
1849                  */
1850                 printk(TPACPI_WARN
1851                         "WARNING: Outdated ThinkPad BIOS/EC firmware\n");
1852                 printk(TPACPI_WARN
1853                         "WARNING: This firmware may be missing critical bug "
1854                         "fixes and/or important features\n");
1855         }
1856 }
1857
1858 static bool __init tpacpi_is_fw_known(void)
1859 {
1860         return tpacpi_check_quirks(tpacpi_bios_version_qtable,
1861                         ARRAY_SIZE(tpacpi_bios_version_qtable)) != 0;
1862 }
1863
1864 /****************************************************************************
1865  ****************************************************************************
1866  *
1867  * Subdrivers
1868  *
1869  ****************************************************************************
1870  ****************************************************************************/
1871
1872 /*************************************************************************
1873  * thinkpad-acpi init subdriver
1874  */
1875
1876 static int __init thinkpad_acpi_driver_init(struct ibm_init_struct *iibm)
1877 {
1878         printk(TPACPI_INFO "%s v%s\n", TPACPI_DESC, TPACPI_VERSION);
1879         printk(TPACPI_INFO "%s\n", TPACPI_URL);
1880
1881         printk(TPACPI_INFO "ThinkPad BIOS %s, EC %s\n",
1882                 (thinkpad_id.bios_version_str) ?
1883                         thinkpad_id.bios_version_str : "unknown",
1884                 (thinkpad_id.ec_version_str) ?
1885                         thinkpad_id.ec_version_str : "unknown");
1886
1887         if (thinkpad_id.vendor && thinkpad_id.model_str)
1888                 printk(TPACPI_INFO "%s %s, model %s\n",
1889                         (thinkpad_id.vendor == PCI_VENDOR_ID_IBM) ?
1890                                 "IBM" : ((thinkpad_id.vendor ==
1891                                                 PCI_VENDOR_ID_LENOVO) ?
1892                                         "Lenovo" : "Unknown vendor"),
1893                         thinkpad_id.model_str,
1894                         (thinkpad_id.nummodel_str) ?
1895                                 thinkpad_id.nummodel_str : "unknown");
1896
1897         tpacpi_check_outdated_fw();
1898         return 0;
1899 }
1900
1901 static int thinkpad_acpi_driver_read(struct seq_file *m)
1902 {
1903         seq_printf(m, "driver:\t\t%s\n", TPACPI_DESC);
1904         seq_printf(m, "version:\t%s\n", TPACPI_VERSION);
1905         return 0;
1906 }
1907
1908 static struct ibm_struct thinkpad_acpi_driver_data = {
1909         .name = "driver",
1910         .read = thinkpad_acpi_driver_read,
1911 };
1912
1913 /*************************************************************************
1914  * Hotkey subdriver
1915  */
1916
1917 /*
1918  * ThinkPad firmware event model
1919  *
1920  * The ThinkPad firmware has two main event interfaces: normal ACPI
1921  * notifications (which follow the ACPI standard), and a private event
1922  * interface.
1923  *
1924  * The private event interface also issues events for the hotkeys.  As
1925  * the driver gained features, the event handling code ended up being
1926  * built around the hotkey subdriver.  This will need to be refactored
1927  * to a more formal event API eventually.
1928  *
1929  * Some "hotkeys" are actually supposed to be used as event reports,
1930  * such as "brightness has changed", "volume has changed", depending on
1931  * the ThinkPad model and how the firmware is operating.
1932  *
1933  * Unlike other classes, hotkey-class events have mask/unmask control on
1934  * non-ancient firmware.  However, how it behaves changes a lot with the
1935  * firmware model and version.
1936  */
1937
1938 enum {  /* hot key scan codes (derived from ACPI DSDT) */
1939         TP_ACPI_HOTKEYSCAN_FNF1         = 0,
1940         TP_ACPI_HOTKEYSCAN_FNF2,
1941         TP_ACPI_HOTKEYSCAN_FNF3,
1942         TP_ACPI_HOTKEYSCAN_FNF4,
1943         TP_ACPI_HOTKEYSCAN_FNF5,
1944         TP_ACPI_HOTKEYSCAN_FNF6,
1945         TP_ACPI_HOTKEYSCAN_FNF7,
1946         TP_ACPI_HOTKEYSCAN_FNF8,
1947         TP_ACPI_HOTKEYSCAN_FNF9,
1948         TP_ACPI_HOTKEYSCAN_FNF10,
1949         TP_ACPI_HOTKEYSCAN_FNF11,
1950         TP_ACPI_HOTKEYSCAN_FNF12,
1951         TP_ACPI_HOTKEYSCAN_FNBACKSPACE,
1952         TP_ACPI_HOTKEYSCAN_FNINSERT,
1953         TP_ACPI_HOTKEYSCAN_FNDELETE,
1954         TP_ACPI_HOTKEYSCAN_FNHOME,
1955         TP_ACPI_HOTKEYSCAN_FNEND,
1956         TP_ACPI_HOTKEYSCAN_FNPAGEUP,
1957         TP_ACPI_HOTKEYSCAN_FNPAGEDOWN,
1958         TP_ACPI_HOTKEYSCAN_FNSPACE,
1959         TP_ACPI_HOTKEYSCAN_VOLUMEUP,
1960         TP_ACPI_HOTKEYSCAN_VOLUMEDOWN,
1961         TP_ACPI_HOTKEYSCAN_MUTE,
1962         TP_ACPI_HOTKEYSCAN_THINKPAD,
1963 };
1964
1965 enum {  /* Keys/events available through NVRAM polling */
1966         TPACPI_HKEY_NVRAM_KNOWN_MASK = 0x00fb88c0U,
1967         TPACPI_HKEY_NVRAM_GOOD_MASK  = 0x00fb8000U,
1968 };
1969
1970 enum {  /* Positions of some of the keys in hotkey masks */
1971         TP_ACPI_HKEY_DISPSWTCH_MASK     = 1 << TP_ACPI_HOTKEYSCAN_FNF7,
1972         TP_ACPI_HKEY_DISPXPAND_MASK     = 1 << TP_ACPI_HOTKEYSCAN_FNF8,
1973         TP_ACPI_HKEY_HIBERNATE_MASK     = 1 << TP_ACPI_HOTKEYSCAN_FNF12,
1974         TP_ACPI_HKEY_BRGHTUP_MASK       = 1 << TP_ACPI_HOTKEYSCAN_FNHOME,
1975         TP_ACPI_HKEY_BRGHTDWN_MASK      = 1 << TP_ACPI_HOTKEYSCAN_FNEND,
1976         TP_ACPI_HKEY_THNKLGHT_MASK      = 1 << TP_ACPI_HOTKEYSCAN_FNPAGEUP,
1977         TP_ACPI_HKEY_ZOOM_MASK          = 1 << TP_ACPI_HOTKEYSCAN_FNSPACE,
1978         TP_ACPI_HKEY_VOLUP_MASK         = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEUP,
1979         TP_ACPI_HKEY_VOLDWN_MASK        = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEDOWN,
1980         TP_ACPI_HKEY_MUTE_MASK          = 1 << TP_ACPI_HOTKEYSCAN_MUTE,
1981         TP_ACPI_HKEY_THINKPAD_MASK      = 1 << TP_ACPI_HOTKEYSCAN_THINKPAD,
1982 };
1983
1984 enum {  /* NVRAM to ACPI HKEY group map */
1985         TP_NVRAM_HKEY_GROUP_HK2         = TP_ACPI_HKEY_THINKPAD_MASK |
1986                                           TP_ACPI_HKEY_ZOOM_MASK |
1987                                           TP_ACPI_HKEY_DISPSWTCH_MASK |
1988                                           TP_ACPI_HKEY_HIBERNATE_MASK,
1989         TP_NVRAM_HKEY_GROUP_BRIGHTNESS  = TP_ACPI_HKEY_BRGHTUP_MASK |
1990                                           TP_ACPI_HKEY_BRGHTDWN_MASK,
1991         TP_NVRAM_HKEY_GROUP_VOLUME      = TP_ACPI_HKEY_VOLUP_MASK |
1992                                           TP_ACPI_HKEY_VOLDWN_MASK |
1993                                           TP_ACPI_HKEY_MUTE_MASK,
1994 };
1995
1996 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1997 struct tp_nvram_state {
1998        u16 thinkpad_toggle:1;
1999        u16 zoom_toggle:1;
2000        u16 display_toggle:1;
2001        u16 thinklight_toggle:1;
2002        u16 hibernate_toggle:1;
2003        u16 displayexp_toggle:1;
2004        u16 display_state:1;
2005        u16 brightness_toggle:1;
2006        u16 volume_toggle:1;
2007        u16 mute:1;
2008
2009        u8 brightness_level;
2010        u8 volume_level;
2011 };
2012
2013 /* kthread for the hotkey poller */
2014 static struct task_struct *tpacpi_hotkey_task;
2015
2016 /* Acquired while the poller kthread is running, use to sync start/stop */
2017 static struct mutex hotkey_thread_mutex;
2018
2019 /*
2020  * Acquire mutex to write poller control variables as an
2021  * atomic block.
2022  *
2023  * Increment hotkey_config_change when changing them if you
2024  * want the kthread to forget old state.
2025  *
2026  * See HOTKEY_CONFIG_CRITICAL_START/HOTKEY_CONFIG_CRITICAL_END
2027  */
2028 static struct mutex hotkey_thread_data_mutex;
2029 static unsigned int hotkey_config_change;
2030
2031 /*
2032  * hotkey poller control variables
2033  *
2034  * Must be atomic or readers will also need to acquire mutex
2035  *
2036  * HOTKEY_CONFIG_CRITICAL_START/HOTKEY_CONFIG_CRITICAL_END
2037  * should be used only when the changes need to be taken as
2038  * a block, OR when one needs to force the kthread to forget
2039  * old state.
2040  */
2041 static u32 hotkey_source_mask;          /* bit mask 0=ACPI,1=NVRAM */
2042 static unsigned int hotkey_poll_freq = 10; /* Hz */
2043
2044 #define HOTKEY_CONFIG_CRITICAL_START \
2045         do { \
2046                 mutex_lock(&hotkey_thread_data_mutex); \
2047                 hotkey_config_change++; \
2048         } while (0);
2049 #define HOTKEY_CONFIG_CRITICAL_END \
2050         mutex_unlock(&hotkey_thread_data_mutex);
2051
2052 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2053
2054 #define hotkey_source_mask 0U
2055 #define HOTKEY_CONFIG_CRITICAL_START
2056 #define HOTKEY_CONFIG_CRITICAL_END
2057
2058 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2059
2060 static struct mutex hotkey_mutex;
2061
2062 static enum {   /* Reasons for waking up */
2063         TP_ACPI_WAKEUP_NONE = 0,        /* None or unknown */
2064         TP_ACPI_WAKEUP_BAYEJ,           /* Bay ejection request */
2065         TP_ACPI_WAKEUP_UNDOCK,          /* Undock request */
2066 } hotkey_wakeup_reason;
2067
2068 static int hotkey_autosleep_ack;
2069
2070 static u32 hotkey_orig_mask;            /* events the BIOS had enabled */
2071 static u32 hotkey_all_mask;             /* all events supported in fw */
2072 static u32 hotkey_reserved_mask;        /* events better left disabled */
2073 static u32 hotkey_driver_mask;          /* events needed by the driver */
2074 static u32 hotkey_user_mask;            /* events visible to userspace */
2075 static u32 hotkey_acpi_mask;            /* events enabled in firmware */
2076
2077 static unsigned int hotkey_report_mode;
2078
2079 static u16 *hotkey_keycode_map;
2080
2081 static struct attribute_set *hotkey_dev_attributes;
2082
2083 static void tpacpi_driver_event(const unsigned int hkey_event);
2084 static void hotkey_driver_event(const unsigned int scancode);
2085
2086 /* HKEY.MHKG() return bits */
2087 #define TP_HOTKEY_TABLET_MASK (1 << 3)
2088
2089 static int hotkey_get_wlsw(void)
2090 {
2091         int status;
2092
2093         if (!tp_features.hotkey_wlsw)
2094                 return -ENODEV;
2095
2096 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
2097         if (dbg_wlswemul)
2098                 return (tpacpi_wlsw_emulstate) ?
2099                                 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
2100 #endif
2101
2102         if (!acpi_evalf(hkey_handle, &status, "WLSW", "d"))
2103                 return -EIO;
2104
2105         return (status) ? TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
2106 }
2107
2108 static int hotkey_get_tablet_mode(int *status)
2109 {
2110         int s;
2111
2112         if (!acpi_evalf(hkey_handle, &s, "MHKG", "d"))
2113                 return -EIO;
2114
2115         *status = ((s & TP_HOTKEY_TABLET_MASK) != 0);
2116         return 0;
2117 }
2118
2119 /*
2120  * Reads current event mask from firmware, and updates
2121  * hotkey_acpi_mask accordingly.  Also resets any bits
2122  * from hotkey_user_mask that are unavailable to be
2123  * delivered (shadow requirement of the userspace ABI).
2124  *
2125  * Call with hotkey_mutex held
2126  */
2127 static int hotkey_mask_get(void)
2128 {
2129         if (tp_features.hotkey_mask) {
2130                 u32 m = 0;
2131
2132                 if (!acpi_evalf(hkey_handle, &m, "DHKN", "d"))
2133                         return -EIO;
2134
2135                 hotkey_acpi_mask = m;
2136         } else {
2137                 /* no mask support doesn't mean no event support... */
2138                 hotkey_acpi_mask = hotkey_all_mask;
2139         }
2140
2141         /* sync userspace-visible mask */
2142         hotkey_user_mask &= (hotkey_acpi_mask | hotkey_source_mask);
2143
2144         return 0;
2145 }
2146
2147 void static hotkey_mask_warn_incomplete_mask(void)
2148 {
2149         /* log only what the user can fix... */
2150         const u32 wantedmask = hotkey_driver_mask &
2151                 ~(hotkey_acpi_mask | hotkey_source_mask) &
2152                 (hotkey_all_mask | TPACPI_HKEY_NVRAM_KNOWN_MASK);
2153
2154         if (wantedmask)
2155                 printk(TPACPI_NOTICE
2156                         "required events 0x%08x not enabled!\n",
2157                         wantedmask);
2158 }
2159
2160 /*
2161  * Set the firmware mask when supported
2162  *
2163  * Also calls hotkey_mask_get to update hotkey_acpi_mask.
2164  *
2165  * NOTE: does not set bits in hotkey_user_mask, but may reset them.
2166  *
2167  * Call with hotkey_mutex held
2168  */
2169 static int hotkey_mask_set(u32 mask)
2170 {
2171         int i;
2172         int rc = 0;
2173
2174         const u32 fwmask = mask & ~hotkey_source_mask;
2175
2176         if (tp_features.hotkey_mask) {
2177                 for (i = 0; i < 32; i++) {
2178                         if (!acpi_evalf(hkey_handle,
2179                                         NULL, "MHKM", "vdd", i + 1,
2180                                         !!(mask & (1 << i)))) {
2181                                 rc = -EIO;
2182                                 break;
2183                         }
2184                 }
2185         }
2186
2187         /*
2188          * We *must* make an inconditional call to hotkey_mask_get to
2189          * refresh hotkey_acpi_mask and update hotkey_user_mask
2190          *
2191          * Take the opportunity to also log when we cannot _enable_
2192          * a given event.
2193          */
2194         if (!hotkey_mask_get() && !rc && (fwmask & ~hotkey_acpi_mask)) {
2195                 printk(TPACPI_NOTICE
2196                        "asked for hotkey mask 0x%08x, but "
2197                        "firmware forced it to 0x%08x\n",
2198                        fwmask, hotkey_acpi_mask);
2199         }
2200
2201         if (tpacpi_lifecycle != TPACPI_LIFE_EXITING)
2202                 hotkey_mask_warn_incomplete_mask();
2203
2204         return rc;
2205 }
2206
2207 /*
2208  * Sets hotkey_user_mask and tries to set the firmware mask
2209  *
2210  * Call with hotkey_mutex held
2211  */
2212 static int hotkey_user_mask_set(const u32 mask)
2213 {
2214         int rc;
2215
2216         /* Give people a chance to notice they are doing something that
2217          * is bound to go boom on their users sooner or later */
2218         if (!tp_warned.hotkey_mask_ff &&
2219             (mask == 0xffff || mask == 0xffffff ||
2220              mask == 0xffffffff)) {
2221                 tp_warned.hotkey_mask_ff = 1;
2222                 printk(TPACPI_NOTICE
2223                        "setting the hotkey mask to 0x%08x is likely "
2224                        "not the best way to go about it\n", mask);
2225                 printk(TPACPI_NOTICE
2226                        "please consider using the driver defaults, "
2227                        "and refer to up-to-date thinkpad-acpi "
2228                        "documentation\n");
2229         }
2230
2231         /* Try to enable what the user asked for, plus whatever we need.
2232          * this syncs everything but won't enable bits in hotkey_user_mask */
2233         rc = hotkey_mask_set((mask | hotkey_driver_mask) & ~hotkey_source_mask);
2234
2235         /* Enable the available bits in hotkey_user_mask */
2236         hotkey_user_mask = mask & (hotkey_acpi_mask | hotkey_source_mask);
2237
2238         return rc;
2239 }
2240
2241 /*
2242  * Sets the driver hotkey mask.
2243  *
2244  * Can be called even if the hotkey subdriver is inactive
2245  */
2246 static int tpacpi_hotkey_driver_mask_set(const u32 mask)
2247 {
2248         int rc;
2249
2250         /* Do the right thing if hotkey_init has not been called yet */
2251         if (!tp_features.hotkey) {
2252                 hotkey_driver_mask = mask;
2253                 return 0;
2254         }
2255
2256         mutex_lock(&hotkey_mutex);
2257
2258         HOTKEY_CONFIG_CRITICAL_START
2259         hotkey_driver_mask = mask;
2260 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2261         hotkey_source_mask |= (mask & ~hotkey_all_mask);
2262 #endif
2263         HOTKEY_CONFIG_CRITICAL_END
2264
2265         rc = hotkey_mask_set((hotkey_acpi_mask | hotkey_driver_mask) &
2266                                                         ~hotkey_source_mask);
2267         mutex_unlock(&hotkey_mutex);
2268
2269         return rc;
2270 }
2271
2272 static int hotkey_status_get(int *status)
2273 {
2274         if (!acpi_evalf(hkey_handle, status, "DHKC", "d"))
2275                 return -EIO;
2276
2277         return 0;
2278 }
2279
2280 static int hotkey_status_set(bool enable)
2281 {
2282         if (!acpi_evalf(hkey_handle, NULL, "MHKC", "vd", enable ? 1 : 0))
2283                 return -EIO;
2284
2285         return 0;
2286 }
2287
2288 static void tpacpi_input_send_tabletsw(void)
2289 {
2290         int state;
2291
2292         if (tp_features.hotkey_tablet &&
2293             !hotkey_get_tablet_mode(&state)) {
2294                 mutex_lock(&tpacpi_inputdev_send_mutex);
2295
2296                 input_report_switch(tpacpi_inputdev,
2297                                     SW_TABLET_MODE, !!state);
2298                 input_sync(tpacpi_inputdev);
2299
2300                 mutex_unlock(&tpacpi_inputdev_send_mutex);
2301         }
2302 }
2303
2304 /* Do NOT call without validating scancode first */
2305 static void tpacpi_input_send_key(const unsigned int scancode)
2306 {
2307         const unsigned int keycode = hotkey_keycode_map[scancode];
2308
2309         if (keycode != KEY_RESERVED) {
2310                 mutex_lock(&tpacpi_inputdev_send_mutex);
2311
2312                 input_report_key(tpacpi_inputdev, keycode, 1);
2313                 if (keycode == KEY_UNKNOWN)
2314                         input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN,
2315                                     scancode);
2316                 input_sync(tpacpi_inputdev);
2317
2318                 input_report_key(tpacpi_inputdev, keycode, 0);
2319                 if (keycode == KEY_UNKNOWN)
2320                         input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN,
2321                                     scancode);
2322                 input_sync(tpacpi_inputdev);
2323
2324                 mutex_unlock(&tpacpi_inputdev_send_mutex);
2325         }
2326 }
2327
2328 /* Do NOT call without validating scancode first */
2329 static void tpacpi_input_send_key_masked(const unsigned int scancode)
2330 {
2331         hotkey_driver_event(scancode);
2332         if (hotkey_user_mask & (1 << scancode))
2333                 tpacpi_input_send_key(scancode);
2334 }
2335
2336 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2337 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver;
2338
2339 /* Do NOT call without validating scancode first */
2340 static void tpacpi_hotkey_send_key(unsigned int scancode)
2341 {
2342         tpacpi_input_send_key_masked(scancode);
2343         if (hotkey_report_mode < 2) {
2344                 acpi_bus_generate_proc_event(ibm_hotkey_acpidriver.device,
2345                                 0x80, TP_HKEY_EV_HOTKEY_BASE + scancode);
2346         }
2347 }
2348
2349 static void hotkey_read_nvram(struct tp_nvram_state *n, const u32 m)
2350 {
2351         u8 d;
2352
2353         if (m & TP_NVRAM_HKEY_GROUP_HK2) {
2354                 d = nvram_read_byte(TP_NVRAM_ADDR_HK2);
2355                 n->thinkpad_toggle = !!(d & TP_NVRAM_MASK_HKT_THINKPAD);
2356                 n->zoom_toggle = !!(d & TP_NVRAM_MASK_HKT_ZOOM);
2357                 n->display_toggle = !!(d & TP_NVRAM_MASK_HKT_DISPLAY);
2358                 n->hibernate_toggle = !!(d & TP_NVRAM_MASK_HKT_HIBERNATE);
2359         }
2360         if (m & TP_ACPI_HKEY_THNKLGHT_MASK) {
2361                 d = nvram_read_byte(TP_NVRAM_ADDR_THINKLIGHT);
2362                 n->thinklight_toggle = !!(d & TP_NVRAM_MASK_THINKLIGHT);
2363         }
2364         if (m & TP_ACPI_HKEY_DISPXPAND_MASK) {
2365                 d = nvram_read_byte(TP_NVRAM_ADDR_VIDEO);
2366                 n->displayexp_toggle =
2367                                 !!(d & TP_NVRAM_MASK_HKT_DISPEXPND);
2368         }
2369         if (m & TP_NVRAM_HKEY_GROUP_BRIGHTNESS) {
2370                 d = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS);
2371                 n->brightness_level = (d & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
2372                                 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
2373                 n->brightness_toggle =
2374                                 !!(d & TP_NVRAM_MASK_HKT_BRIGHTNESS);
2375         }
2376         if (m & TP_NVRAM_HKEY_GROUP_VOLUME) {
2377                 d = nvram_read_byte(TP_NVRAM_ADDR_MIXER);
2378                 n->volume_level = (d & TP_NVRAM_MASK_LEVEL_VOLUME)
2379                                 >> TP_NVRAM_POS_LEVEL_VOLUME;
2380                 n->mute = !!(d & TP_NVRAM_MASK_MUTE);
2381                 n->volume_toggle = !!(d & TP_NVRAM_MASK_HKT_VOLUME);
2382         }
2383 }
2384
2385 static void hotkey_compare_and_issue_event(struct tp_nvram_state *oldn,
2386                                            struct tp_nvram_state *newn,
2387                                            const u32 event_mask)
2388 {
2389
2390 #define TPACPI_COMPARE_KEY(__scancode, __member) \
2391         do { \
2392                 if ((event_mask & (1 << __scancode)) && \
2393                     oldn->__member != newn->__member) \
2394                         tpacpi_hotkey_send_key(__scancode); \
2395         } while (0)
2396
2397 #define TPACPI_MAY_SEND_KEY(__scancode) \
2398         do { \
2399                 if (event_mask & (1 << __scancode)) \
2400                         tpacpi_hotkey_send_key(__scancode); \
2401         } while (0)
2402
2403         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_THINKPAD, thinkpad_toggle);
2404         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNSPACE, zoom_toggle);
2405         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF7, display_toggle);
2406         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF12, hibernate_toggle);
2407
2408         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNPAGEUP, thinklight_toggle);
2409
2410         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF8, displayexp_toggle);
2411
2412         /* handle volume */
2413         if (oldn->volume_toggle != newn->volume_toggle) {
2414                 if (oldn->mute != newn->mute) {
2415                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE);
2416                 }
2417                 if (oldn->volume_level > newn->volume_level) {
2418                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
2419                 } else if (oldn->volume_level < newn->volume_level) {
2420                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
2421                 } else if (oldn->mute == newn->mute) {
2422                         /* repeated key presses that didn't change state */
2423                         if (newn->mute) {
2424                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE);
2425                         } else if (newn->volume_level != 0) {
2426                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
2427                         } else {
2428                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
2429                         }
2430                 }
2431         }
2432
2433         /* handle brightness */
2434         if (oldn->brightness_toggle != newn->brightness_toggle) {
2435                 if (oldn->brightness_level < newn->brightness_level) {
2436                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
2437                 } else if (oldn->brightness_level > newn->brightness_level) {
2438                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
2439                 } else {
2440                         /* repeated key presses that didn't change state */
2441                         if (newn->brightness_level != 0) {
2442                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
2443                         } else {
2444                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
2445                         }
2446                 }
2447         }
2448
2449 #undef TPACPI_COMPARE_KEY
2450 #undef TPACPI_MAY_SEND_KEY
2451 }
2452
2453 /*
2454  * Polling driver
2455  *
2456  * We track all events in hotkey_source_mask all the time, since
2457  * most of them are edge-based.  We only issue those requested by
2458  * hotkey_user_mask or hotkey_driver_mask, though.
2459  */
2460 static int hotkey_kthread(void *data)
2461 {
2462         struct tp_nvram_state s[2];
2463         u32 poll_mask, event_mask;
2464         unsigned int si, so;
2465         unsigned long t;
2466         unsigned int change_detector, must_reset;
2467         unsigned int poll_freq;
2468
2469         mutex_lock(&hotkey_thread_mutex);
2470
2471         if (tpacpi_lifecycle == TPACPI_LIFE_EXITING)
2472                 goto exit;
2473
2474         set_freezable();
2475
2476         so = 0;
2477         si = 1;
2478         t = 0;
2479
2480         /* Initial state for compares */
2481         mutex_lock(&hotkey_thread_data_mutex);
2482         change_detector = hotkey_config_change;
2483         poll_mask = hotkey_source_mask;
2484         event_mask = hotkey_source_mask &
2485                         (hotkey_driver_mask | hotkey_user_mask);
2486         poll_freq = hotkey_poll_freq;
2487         mutex_unlock(&hotkey_thread_data_mutex);
2488         hotkey_read_nvram(&s[so], poll_mask);
2489
2490         while (!kthread_should_stop()) {
2491                 if (t == 0) {
2492                         if (likely(poll_freq))
2493                                 t = 1000/poll_freq;
2494                         else
2495                                 t = 100;        /* should never happen... */
2496                 }
2497                 t = msleep_interruptible(t);
2498                 if (unlikely(kthread_should_stop()))
2499                         break;
2500                 must_reset = try_to_freeze();
2501                 if (t > 0 && !must_reset)
2502                         continue;
2503
2504                 mutex_lock(&hotkey_thread_data_mutex);
2505                 if (must_reset || hotkey_config_change != change_detector) {
2506                         /* forget old state on thaw or config change */
2507                         si = so;
2508                         t = 0;
2509                         change_detector = hotkey_config_change;
2510                 }
2511                 poll_mask = hotkey_source_mask;
2512                 event_mask = hotkey_source_mask &
2513                                 (hotkey_driver_mask | hotkey_user_mask);
2514                 poll_freq = hotkey_poll_freq;
2515                 mutex_unlock(&hotkey_thread_data_mutex);
2516
2517                 if (likely(poll_mask)) {
2518                         hotkey_read_nvram(&s[si], poll_mask);
2519                         if (likely(si != so)) {
2520                                 hotkey_compare_and_issue_event(&s[so], &s[si],
2521                                                                 event_mask);
2522                         }
2523                 }
2524
2525                 so = si;
2526                 si ^= 1;
2527         }
2528
2529 exit:
2530         mutex_unlock(&hotkey_thread_mutex);
2531         return 0;
2532 }
2533
2534 /* call with hotkey_mutex held */
2535 static void hotkey_poll_stop_sync(void)
2536 {
2537         if (tpacpi_hotkey_task) {
2538                 if (frozen(tpacpi_hotkey_task) ||
2539                     freezing(tpacpi_hotkey_task))
2540                         thaw_process(tpacpi_hotkey_task);
2541
2542                 kthread_stop(tpacpi_hotkey_task);
2543                 tpacpi_hotkey_task = NULL;
2544                 mutex_lock(&hotkey_thread_mutex);
2545                 /* at this point, the thread did exit */
2546                 mutex_unlock(&hotkey_thread_mutex);
2547         }
2548 }
2549
2550 /* call with hotkey_mutex held */
2551 static void hotkey_poll_setup(bool may_warn)
2552 {
2553         const u32 poll_driver_mask = hotkey_driver_mask & hotkey_source_mask;
2554         const u32 poll_user_mask = hotkey_user_mask & hotkey_source_mask;
2555
2556         if (hotkey_poll_freq > 0 &&
2557             (poll_driver_mask ||
2558              (poll_user_mask && tpacpi_inputdev->users > 0))) {
2559                 if (!tpacpi_hotkey_task) {
2560                         tpacpi_hotkey_task = kthread_run(hotkey_kthread,
2561                                         NULL, TPACPI_NVRAM_KTHREAD_NAME);
2562                         if (IS_ERR(tpacpi_hotkey_task)) {
2563                                 tpacpi_hotkey_task = NULL;
2564                                 printk(TPACPI_ERR
2565                                        "could not create kernel thread "
2566                                        "for hotkey polling\n");
2567                         }
2568                 }
2569         } else {
2570                 hotkey_poll_stop_sync();
2571                 if (may_warn && (poll_driver_mask || poll_user_mask) &&
2572                     hotkey_poll_freq == 0) {
2573                         printk(TPACPI_NOTICE
2574                                 "hot keys 0x%08x and/or events 0x%08x "
2575                                 "require polling, which is currently "
2576                                 "disabled\n",
2577                                 poll_user_mask, poll_driver_mask);
2578                 }
2579         }
2580 }
2581
2582 static void hotkey_poll_setup_safe(bool may_warn)
2583 {
2584         mutex_lock(&hotkey_mutex);
2585         hotkey_poll_setup(may_warn);
2586         mutex_unlock(&hotkey_mutex);
2587 }
2588
2589 /* call with hotkey_mutex held */
2590 static void hotkey_poll_set_freq(unsigned int freq)
2591 {
2592         if (!freq)
2593                 hotkey_poll_stop_sync();
2594
2595         hotkey_poll_freq = freq;
2596 }
2597
2598 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2599
2600 static void hotkey_poll_setup_safe(bool __unused)
2601 {
2602 }
2603
2604 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2605
2606 static int hotkey_inputdev_open(struct input_dev *dev)
2607 {
2608         switch (tpacpi_lifecycle) {
2609         case TPACPI_LIFE_INIT:
2610                 /*
2611                  * hotkey_init will call hotkey_poll_setup_safe
2612                  * at the appropriate moment
2613                  */
2614                 return 0;
2615         case TPACPI_LIFE_EXITING:
2616                 return -EBUSY;
2617         case TPACPI_LIFE_RUNNING:
2618                 hotkey_poll_setup_safe(false);
2619                 return 0;
2620         }
2621
2622         /* Should only happen if tpacpi_lifecycle is corrupt */
2623         BUG();
2624         return -EBUSY;
2625 }
2626
2627 static void hotkey_inputdev_close(struct input_dev *dev)
2628 {
2629         /* disable hotkey polling when possible */
2630         if (tpacpi_lifecycle == TPACPI_LIFE_RUNNING &&
2631             !(hotkey_source_mask & hotkey_driver_mask))
2632                 hotkey_poll_setup_safe(false);
2633 }
2634
2635 /* sysfs hotkey enable ------------------------------------------------- */
2636 static ssize_t hotkey_enable_show(struct device *dev,
2637                            struct device_attribute *attr,
2638                            char *buf)
2639 {
2640         int res, status;
2641
2642         printk_deprecated_attribute("hotkey_enable",
2643                         "Hotkey reporting is always enabled");
2644
2645         res = hotkey_status_get(&status);
2646         if (res)
2647                 return res;
2648
2649         return snprintf(buf, PAGE_SIZE, "%d\n", status);
2650 }
2651
2652 static ssize_t hotkey_enable_store(struct device *dev,
2653                             struct device_attribute *attr,
2654                             const char *buf, size_t count)
2655 {
2656         unsigned long t;
2657
2658         printk_deprecated_attribute("hotkey_enable",
2659                         "Hotkeys can be disabled through hotkey_mask");
2660
2661         if (parse_strtoul(buf, 1, &t))
2662                 return -EINVAL;
2663
2664         if (t == 0)
2665                 return -EPERM;
2666
2667         return count;
2668 }
2669
2670 static struct device_attribute dev_attr_hotkey_enable =
2671         __ATTR(hotkey_enable, S_IWUSR | S_IRUGO,
2672                 hotkey_enable_show, hotkey_enable_store);
2673
2674 /* sysfs hotkey mask --------------------------------------------------- */
2675 static ssize_t hotkey_mask_show(struct device *dev,
2676                            struct device_attribute *attr,
2677                            char *buf)
2678 {
2679         return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_user_mask);
2680 }
2681
2682 static ssize_t hotkey_mask_store(struct device *dev,
2683                             struct device_attribute *attr,
2684                             const char *buf, size_t count)
2685 {
2686         unsigned long t;
2687         int res;
2688
2689         if (parse_strtoul(buf, 0xffffffffUL, &t))
2690                 return -EINVAL;
2691
2692         if (mutex_lock_killable(&hotkey_mutex))
2693                 return -ERESTARTSYS;
2694
2695         res = hotkey_user_mask_set(t);
2696
2697 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2698         hotkey_poll_setup(true);
2699 #endif
2700
2701         mutex_unlock(&hotkey_mutex);
2702
2703         tpacpi_disclose_usertask("hotkey_mask", "set to 0x%08lx\n", t);
2704
2705         return (res) ? res : count;
2706 }
2707
2708 static struct device_attribute dev_attr_hotkey_mask =
2709         __ATTR(hotkey_mask, S_IWUSR | S_IRUGO,
2710                 hotkey_mask_show, hotkey_mask_store);
2711
2712 /* sysfs hotkey bios_enabled ------------------------------------------- */
2713 static ssize_t hotkey_bios_enabled_show(struct device *dev,
2714                            struct device_attribute *attr,
2715                            char *buf)
2716 {
2717         return sprintf(buf, "0\n");
2718 }
2719
2720 static struct device_attribute dev_attr_hotkey_bios_enabled =
2721         __ATTR(hotkey_bios_enabled, S_IRUGO, hotkey_bios_enabled_show, NULL);
2722
2723 /* sysfs hotkey bios_mask ---------------------------------------------- */
2724 static ssize_t hotkey_bios_mask_show(struct device *dev,
2725                            struct device_attribute *attr,
2726                            char *buf)
2727 {
2728         printk_deprecated_attribute("hotkey_bios_mask",
2729                         "This attribute is useless.");
2730         return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_orig_mask);
2731 }
2732
2733 static struct device_attribute dev_attr_hotkey_bios_mask =
2734         __ATTR(hotkey_bios_mask, S_IRUGO, hotkey_bios_mask_show, NULL);
2735
2736 /* sysfs hotkey all_mask ----------------------------------------------- */
2737 static ssize_t hotkey_all_mask_show(struct device *dev,
2738                            struct device_attribute *attr,
2739                            char *buf)
2740 {
2741         return snprintf(buf, PAGE_SIZE, "0x%08x\n",
2742                                 hotkey_all_mask | hotkey_source_mask);
2743 }
2744
2745 static struct device_attribute dev_attr_hotkey_all_mask =
2746         __ATTR(hotkey_all_mask, S_IRUGO, hotkey_all_mask_show, NULL);
2747
2748 /* sysfs hotkey recommended_mask --------------------------------------- */
2749 static ssize_t hotkey_recommended_mask_show(struct device *dev,
2750                                             struct device_attribute *attr,
2751                                             char *buf)
2752 {
2753         return snprintf(buf, PAGE_SIZE, "0x%08x\n",
2754                         (hotkey_all_mask | hotkey_source_mask)
2755                         & ~hotkey_reserved_mask);
2756 }
2757
2758 static struct device_attribute dev_attr_hotkey_recommended_mask =
2759         __ATTR(hotkey_recommended_mask, S_IRUGO,
2760                 hotkey_recommended_mask_show, NULL);
2761
2762 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2763
2764 /* sysfs hotkey hotkey_source_mask ------------------------------------- */
2765 static ssize_t hotkey_source_mask_show(struct device *dev,
2766                            struct device_attribute *attr,
2767                            char *buf)
2768 {
2769         return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_source_mask);
2770 }
2771
2772 static ssize_t hotkey_source_mask_store(struct device *dev,
2773                             struct device_attribute *attr,
2774                             const char *buf, size_t count)
2775 {
2776         unsigned long t;
2777         u32 r_ev;
2778         int rc;
2779
2780         if (parse_strtoul(buf, 0xffffffffUL, &t) ||
2781                 ((t & ~TPACPI_HKEY_NVRAM_KNOWN_MASK) != 0))
2782                 return -EINVAL;
2783
2784         if (mutex_lock_killable(&hotkey_mutex))
2785                 return -ERESTARTSYS;
2786
2787         HOTKEY_CONFIG_CRITICAL_START
2788         hotkey_source_mask = t;
2789         HOTKEY_CONFIG_CRITICAL_END
2790
2791         rc = hotkey_mask_set((hotkey_user_mask | hotkey_driver_mask) &
2792                         ~hotkey_source_mask);
2793         hotkey_poll_setup(true);
2794
2795         /* check if events needed by the driver got disabled */
2796         r_ev = hotkey_driver_mask & ~(hotkey_acpi_mask & hotkey_all_mask)
2797                 & ~hotkey_source_mask & TPACPI_HKEY_NVRAM_KNOWN_MASK;
2798
2799         mutex_unlock(&hotkey_mutex);
2800
2801         if (rc < 0)
2802                 printk(TPACPI_ERR "hotkey_source_mask: failed to update the"
2803                         "firmware event mask!\n");
2804
2805         if (r_ev)
2806                 printk(TPACPI_NOTICE "hotkey_source_mask: "
2807                         "some important events were disabled: "
2808                         "0x%04x\n", r_ev);
2809
2810         tpacpi_disclose_usertask("hotkey_source_mask", "set to 0x%08lx\n", t);
2811
2812         return (rc < 0) ? rc : count;
2813 }
2814
2815 static struct device_attribute dev_attr_hotkey_source_mask =
2816         __ATTR(hotkey_source_mask, S_IWUSR | S_IRUGO,
2817                 hotkey_source_mask_show, hotkey_source_mask_store);
2818
2819 /* sysfs hotkey hotkey_poll_freq --------------------------------------- */
2820 static ssize_t hotkey_poll_freq_show(struct device *dev,
2821                            struct device_attribute *attr,
2822                            char *buf)
2823 {
2824         return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_poll_freq);
2825 }
2826
2827 static ssize_t hotkey_poll_freq_store(struct device *dev,
2828                             struct device_attribute *attr,
2829                             const char *buf, size_t count)
2830 {
2831         unsigned long t;
2832
2833         if (parse_strtoul(buf, 25, &t))
2834                 return -EINVAL;
2835
2836         if (mutex_lock_killable(&hotkey_mutex))
2837                 return -ERESTARTSYS;
2838
2839         hotkey_poll_set_freq(t);
2840         hotkey_poll_setup(true);
2841
2842         mutex_unlock(&hotkey_mutex);
2843
2844         tpacpi_disclose_usertask("hotkey_poll_freq", "set to %lu\n", t);
2845
2846         return count;
2847 }
2848
2849 static struct device_attribute dev_attr_hotkey_poll_freq =
2850         __ATTR(hotkey_poll_freq, S_IWUSR | S_IRUGO,
2851                 hotkey_poll_freq_show, hotkey_poll_freq_store);
2852
2853 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2854
2855 /* sysfs hotkey radio_sw (pollable) ------------------------------------ */
2856 static ssize_t hotkey_radio_sw_show(struct device *dev,
2857                            struct device_attribute *attr,
2858                            char *buf)
2859 {
2860         int res;
2861         res = hotkey_get_wlsw();
2862         if (res < 0)
2863                 return res;
2864
2865         /* Opportunistic update */
2866         tpacpi_rfk_update_hwblock_state((res == TPACPI_RFK_RADIO_OFF));
2867
2868         return snprintf(buf, PAGE_SIZE, "%d\n",
2869                         (res == TPACPI_RFK_RADIO_OFF) ? 0 : 1);
2870 }
2871
2872 static struct device_attribute dev_attr_hotkey_radio_sw =
2873         __ATTR(hotkey_radio_sw, S_IRUGO, hotkey_radio_sw_show, NULL);
2874
2875 static void hotkey_radio_sw_notify_change(void)
2876 {
2877         if (tp_features.hotkey_wlsw)
2878                 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2879                              "hotkey_radio_sw");
2880 }
2881
2882 /* sysfs hotkey tablet mode (pollable) --------------------------------- */
2883 static ssize_t hotkey_tablet_mode_show(struct device *dev,
2884                            struct device_attribute *attr,
2885                            char *buf)
2886 {
2887         int res, s;
2888         res = hotkey_get_tablet_mode(&s);
2889         if (res < 0)
2890                 return res;
2891
2892         return snprintf(buf, PAGE_SIZE, "%d\n", !!s);
2893 }
2894
2895 static struct device_attribute dev_attr_hotkey_tablet_mode =
2896         __ATTR(hotkey_tablet_mode, S_IRUGO, hotkey_tablet_mode_show, NULL);
2897
2898 static void hotkey_tablet_mode_notify_change(void)
2899 {
2900         if (tp_features.hotkey_tablet)
2901                 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2902                              "hotkey_tablet_mode");
2903 }
2904
2905 /* sysfs hotkey report_mode -------------------------------------------- */
2906 static ssize_t hotkey_report_mode_show(struct device *dev,
2907                            struct device_attribute *attr,
2908                            char *buf)
2909 {
2910         return snprintf(buf, PAGE_SIZE, "%d\n",
2911                 (hotkey_report_mode != 0) ? hotkey_report_mode : 1);
2912 }
2913
2914 static struct device_attribute dev_attr_hotkey_report_mode =
2915         __ATTR(hotkey_report_mode, S_IRUGO, hotkey_report_mode_show, NULL);
2916
2917 /* sysfs wakeup reason (pollable) -------------------------------------- */
2918 static ssize_t hotkey_wakeup_reason_show(struct device *dev,
2919                            struct device_attribute *attr,
2920                            char *buf)
2921 {
2922         return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_wakeup_reason);
2923 }
2924
2925 static struct device_attribute dev_attr_hotkey_wakeup_reason =
2926         __ATTR(wakeup_reason, S_IRUGO, hotkey_wakeup_reason_show, NULL);
2927
2928 static void hotkey_wakeup_reason_notify_change(void)
2929 {
2930         sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2931                      "wakeup_reason");
2932 }
2933
2934 /* sysfs wakeup hotunplug_complete (pollable) -------------------------- */
2935 static ssize_t hotkey_wakeup_hotunplug_complete_show(struct device *dev,
2936                            struct device_attribute *attr,
2937                            char *buf)
2938 {
2939         return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_autosleep_ack);
2940 }
2941
2942 static struct device_attribute dev_attr_hotkey_wakeup_hotunplug_complete =
2943         __ATTR(wakeup_hotunplug_complete, S_IRUGO,
2944                hotkey_wakeup_hotunplug_complete_show, NULL);
2945
2946 static void hotkey_wakeup_hotunplug_complete_notify_change(void)
2947 {
2948         sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2949                      "wakeup_hotunplug_complete");
2950 }
2951
2952 /* --------------------------------------------------------------------- */
2953
2954 static struct attribute *hotkey_attributes[] __initdata = {
2955         &dev_attr_hotkey_enable.attr,
2956         &dev_attr_hotkey_bios_enabled.attr,
2957         &dev_attr_hotkey_bios_mask.attr,
2958         &dev_attr_hotkey_report_mode.attr,
2959         &dev_attr_hotkey_wakeup_reason.attr,
2960         &dev_attr_hotkey_wakeup_hotunplug_complete.attr,
2961         &dev_attr_hotkey_mask.attr,
2962         &dev_attr_hotkey_all_mask.attr,
2963         &dev_attr_hotkey_recommended_mask.attr,
2964 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2965         &dev_attr_hotkey_source_mask.attr,
2966         &dev_attr_hotkey_poll_freq.attr,
2967 #endif
2968 };
2969
2970 /*
2971  * Sync both the hw and sw blocking state of all switches
2972  */
2973 static void tpacpi_send_radiosw_update(void)
2974 {
2975         int wlsw;
2976
2977         /*
2978          * We must sync all rfkill controllers *before* issuing any
2979          * rfkill input events, or we will race the rfkill core input
2980          * handler.
2981          *
2982          * tpacpi_inputdev_send_mutex works as a syncronization point
2983          * for the above.
2984          *
2985          * We optimize to avoid numerous calls to hotkey_get_wlsw.
2986          */
2987
2988         wlsw = hotkey_get_wlsw();
2989
2990         /* Sync hw blocking state first if it is hw-blocked */
2991         if (wlsw == TPACPI_RFK_RADIO_OFF)
2992                 tpacpi_rfk_update_hwblock_state(true);
2993
2994         /* Sync sw blocking state */
2995         tpacpi_rfk_update_swstate_all();
2996
2997         /* Sync hw blocking state last if it is hw-unblocked */
2998         if (wlsw == TPACPI_RFK_RADIO_ON)
2999                 tpacpi_rfk_update_hwblock_state(false);
3000
3001         /* Issue rfkill input event for WLSW switch */
3002         if (!(wlsw < 0)) {
3003                 mutex_lock(&tpacpi_inputdev_send_mutex);
3004
3005                 input_report_switch(tpacpi_inputdev,
3006                                     SW_RFKILL_ALL, (wlsw > 0));
3007                 input_sync(tpacpi_inputdev);
3008
3009                 mutex_unlock(&tpacpi_inputdev_send_mutex);
3010         }
3011
3012         /*
3013          * this can be unconditional, as we will poll state again
3014          * if userspace uses the notify to read data
3015          */
3016         hotkey_radio_sw_notify_change();
3017 }
3018
3019 static void hotkey_exit(void)
3020 {
3021 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
3022         mutex_lock(&hotkey_mutex);
3023         hotkey_poll_stop_sync();
3024         mutex_unlock(&hotkey_mutex);
3025 #endif
3026
3027         if (hotkey_dev_attributes)
3028                 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
3029
3030         kfree(hotkey_keycode_map);
3031
3032         dbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_HKEY,
3033                    "restoring original HKEY status and mask\n");
3034         /* yes, there is a bitwise or below, we want the
3035          * functions to be called even if one of them fail */
3036         if (((tp_features.hotkey_mask &&
3037               hotkey_mask_set(hotkey_orig_mask)) |
3038              hotkey_status_set(false)) != 0)
3039                 printk(TPACPI_ERR
3040                        "failed to restore hot key mask "
3041                        "to BIOS defaults\n");
3042 }
3043
3044 static void __init hotkey_unmap(const unsigned int scancode)
3045 {
3046         if (hotkey_keycode_map[scancode] != KEY_RESERVED) {
3047                 clear_bit(hotkey_keycode_map[scancode],
3048                           tpacpi_inputdev->keybit);
3049                 hotkey_keycode_map[scancode] = KEY_RESERVED;
3050         }
3051 }
3052
3053 /*
3054  * HKEY quirks:
3055  *   TPACPI_HK_Q_INIMASK:       Supports FN+F3,FN+F4,FN+F12
3056  */
3057
3058 #define TPACPI_HK_Q_INIMASK     0x0001
3059
3060 static const struct tpacpi_quirk tpacpi_hotkey_qtable[] __initconst = {
3061         TPACPI_Q_IBM('I', 'H', TPACPI_HK_Q_INIMASK), /* 600E */
3062         TPACPI_Q_IBM('I', 'N', TPACPI_HK_Q_INIMASK), /* 600E */
3063         TPACPI_Q_IBM('I', 'D', TPACPI_HK_Q_INIMASK), /* 770, 770E, 770ED */
3064         TPACPI_Q_IBM('I', 'W', TPACPI_HK_Q_INIMASK), /* A20m */
3065         TPACPI_Q_IBM('I', 'V', TPACPI_HK_Q_INIMASK), /* A20p */
3066         TPACPI_Q_IBM('1', '0', TPACPI_HK_Q_INIMASK), /* A21e, A22e */
3067         TPACPI_Q_IBM('K', 'U', TPACPI_HK_Q_INIMASK), /* A21e */
3068         TPACPI_Q_IBM('K', 'X', TPACPI_HK_Q_INIMASK), /* A21m, A22m */
3069         TPACPI_Q_IBM('K', 'Y', TPACPI_HK_Q_INIMASK), /* A21p, A22p */
3070         TPACPI_Q_IBM('1', 'B', TPACPI_HK_Q_INIMASK), /* A22e */
3071         TPACPI_Q_IBM('1', '3', TPACPI_HK_Q_INIMASK), /* A22m */
3072         TPACPI_Q_IBM('1', 'E', TPACPI_HK_Q_INIMASK), /* A30/p (0) */
3073         TPACPI_Q_IBM('1', 'C', TPACPI_HK_Q_INIMASK), /* R30 */
3074         TPACPI_Q_IBM('1', 'F', TPACPI_HK_Q_INIMASK), /* R31 */
3075         TPACPI_Q_IBM('I', 'Y', TPACPI_HK_Q_INIMASK), /* T20 */
3076         TPACPI_Q_IBM('K', 'Z', TPACPI_HK_Q_INIMASK), /* T21 */
3077         TPACPI_Q_IBM('1', '6', TPACPI_HK_Q_INIMASK), /* T22 */
3078         TPACPI_Q_IBM('I', 'Z', TPACPI_HK_Q_INIMASK), /* X20, X21 */
3079         TPACPI_Q_IBM('1', 'D', TPACPI_HK_Q_INIMASK), /* X22, X23, X24 */
3080 };
3081
3082 static int __init hotkey_init(struct ibm_init_struct *iibm)
3083 {
3084         /* Requirements for changing the default keymaps:
3085          *
3086          * 1. Many of the keys are mapped to KEY_RESERVED for very
3087          *    good reasons.  Do not change them unless you have deep
3088          *    knowledge on the IBM and Lenovo ThinkPad firmware for
3089          *    the various ThinkPad models.  The driver behaves
3090          *    differently for KEY_RESERVED: such keys have their
3091          *    hot key mask *unset* in mask_recommended, and also
3092          *    in the initial hot key mask programmed into the
3093          *    firmware at driver load time, which means the firm-
3094          *    ware may react very differently if you change them to
3095          *    something else;
3096          *
3097          * 2. You must be subscribed to the linux-thinkpad and
3098          *    ibm-acpi-devel mailing lists, and you should read the
3099          *    list archives since 2007 if you want to change the
3100          *    keymaps.  This requirement exists so that you will
3101          *    know the past history of problems with the thinkpad-
3102          *    acpi driver keymaps, and also that you will be
3103          *    listening to any bug reports;
3104          *
3105          * 3. Do not send thinkpad-acpi specific patches directly to
3106          *    for merging, *ever*.  Send them to the linux-acpi
3107          *    mailinglist for comments.  Merging is to be done only
3108          *    through acpi-test and the ACPI maintainer.
3109          *
3110          * If the above is too much to ask, don't change the keymap.
3111          * Ask the thinkpad-acpi maintainer to do it, instead.
3112          */
3113         static u16 ibm_keycode_map[] __initdata = {
3114                 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
3115                 KEY_FN_F1,      KEY_FN_F2,      KEY_COFFEE,     KEY_SLEEP,
3116                 KEY_WLAN,       KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
3117                 KEY_FN_F9,      KEY_FN_F10,     KEY_FN_F11,     KEY_SUSPEND,
3118
3119                 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
3120                 KEY_UNKNOWN,    /* 0x0C: FN+BACKSPACE */
3121                 KEY_UNKNOWN,    /* 0x0D: FN+INSERT */
3122                 KEY_UNKNOWN,    /* 0x0E: FN+DELETE */
3123
3124                 /* brightness: firmware always reacts to them */
3125                 KEY_RESERVED,   /* 0x0F: FN+HOME (brightness up) */
3126                 KEY_RESERVED,   /* 0x10: FN+END (brightness down) */
3127
3128                 /* Thinklight: firmware always react to it */
3129                 KEY_RESERVED,   /* 0x11: FN+PGUP (thinklight toggle) */
3130
3131                 KEY_UNKNOWN,    /* 0x12: FN+PGDOWN */
3132                 KEY_ZOOM,       /* 0x13: FN+SPACE (zoom) */
3133
3134                 /* Volume: firmware always react to it and reprograms
3135                  * the built-in *extra* mixer.  Never map it to control
3136                  * another mixer by default. */
3137                 KEY_RESERVED,   /* 0x14: VOLUME UP */
3138                 KEY_RESERVED,   /* 0x15: VOLUME DOWN */
3139                 KEY_RESERVED,   /* 0x16: MUTE */
3140
3141                 KEY_VENDOR,     /* 0x17: Thinkpad/AccessIBM/Lenovo */
3142
3143                 /* (assignments unknown, please report if found) */
3144                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3145                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3146         };
3147         static u16 lenovo_keycode_map[] __initdata = {
3148                 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
3149                 KEY_FN_F1,      KEY_COFFEE,     KEY_BATTERY,    KEY_SLEEP,
3150                 KEY_WLAN,       KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
3151                 KEY_FN_F9,      KEY_FN_F10,     KEY_FN_F11,     KEY_SUSPEND,
3152
3153                 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
3154                 KEY_UNKNOWN,    /* 0x0C: FN+BACKSPACE */
3155                 KEY_UNKNOWN,    /* 0x0D: FN+INSERT */
3156                 KEY_UNKNOWN,    /* 0x0E: FN+DELETE */
3157
3158                 /* These should be enabled --only-- when ACPI video
3159                  * is disabled (i.e. in "vendor" mode), and are handled
3160                  * in a special way by the init code */
3161                 KEY_BRIGHTNESSUP,       /* 0x0F: FN+HOME (brightness up) */
3162                 KEY_BRIGHTNESSDOWN,     /* 0x10: FN+END (brightness down) */
3163
3164                 KEY_RESERVED,   /* 0x11: FN+PGUP (thinklight toggle) */
3165
3166                 KEY_UNKNOWN,    /* 0x12: FN+PGDOWN */
3167                 KEY_ZOOM,       /* 0x13: FN+SPACE (zoom) */
3168
3169                 /* Volume: z60/z61, T60 (BIOS version?): firmware always
3170                  * react to it and reprograms the built-in *extra* mixer.
3171                  * Never map it to control another mixer by default.
3172                  *
3173                  * T60?, T61, R60?, R61: firmware and EC tries to send
3174                  * these over the regular keyboard, so these are no-ops,
3175                  * but there are still weird bugs re. MUTE, so do not
3176                  * change unless you get test reports from all Lenovo
3177                  * models.  May cause the BIOS to interfere with the
3178                  * HDA mixer.
3179                  */
3180                 KEY_RESERVED,   /* 0x14: VOLUME UP */
3181                 KEY_RESERVED,   /* 0x15: VOLUME DOWN */
3182                 KEY_RESERVED,   /* 0x16: MUTE */
3183
3184                 KEY_VENDOR,     /* 0x17: Thinkpad/AccessIBM/Lenovo */
3185
3186                 /* (assignments unknown, please report if found) */
3187                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3188                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3189         };
3190
3191 #define TPACPI_HOTKEY_MAP_LEN           ARRAY_SIZE(ibm_keycode_map)
3192 #define TPACPI_HOTKEY_MAP_SIZE          sizeof(ibm_keycode_map)
3193 #define TPACPI_HOTKEY_MAP_TYPESIZE      sizeof(ibm_keycode_map[0])
3194
3195         int res, i;
3196         int status;
3197         int hkeyv;
3198         bool radiosw_state  = false;
3199         bool tabletsw_state = false;
3200
3201         unsigned long quirks;
3202
3203         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3204                         "initializing hotkey subdriver\n");
3205
3206         BUG_ON(!tpacpi_inputdev);
3207         BUG_ON(tpacpi_inputdev->open != NULL ||
3208                tpacpi_inputdev->close != NULL);
3209
3210         TPACPI_ACPIHANDLE_INIT(hkey);
3211         mutex_init(&hotkey_mutex);
3212
3213 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
3214         mutex_init(&hotkey_thread_mutex);
3215         mutex_init(&hotkey_thread_data_mutex);
3216 #endif
3217
3218         /* hotkey not supported on 570 */
3219         tp_features.hotkey = hkey_handle != NULL;
3220
3221         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3222                 "hotkeys are %s\n",
3223                 str_supported(tp_features.hotkey));
3224
3225         if (!tp_features.hotkey)
3226                 return 1;
3227
3228         quirks = tpacpi_check_quirks(tpacpi_hotkey_qtable,
3229                                      ARRAY_SIZE(tpacpi_hotkey_qtable));
3230
3231         tpacpi_disable_brightness_delay();
3232
3233         /* MUST have enough space for all attributes to be added to
3234          * hotkey_dev_attributes */
3235         hotkey_dev_attributes = create_attr_set(
3236                                         ARRAY_SIZE(hotkey_attributes) + 2,
3237                                         NULL);
3238         if (!hotkey_dev_attributes)
3239                 return -ENOMEM;
3240         res = add_many_to_attr_set(hotkey_dev_attributes,
3241                         hotkey_attributes,
3242                         ARRAY_SIZE(hotkey_attributes));
3243         if (res)
3244                 goto err_exit;
3245
3246         /* mask not supported on 600e/x, 770e, 770x, A21e, A2xm/p,
3247            A30, R30, R31, T20-22, X20-21, X22-24.  Detected by checking
3248            for HKEY interface version 0x100 */
3249         if (acpi_evalf(hkey_handle, &hkeyv, "MHKV", "qd")) {
3250                 if ((hkeyv >> 8) != 1) {
3251                         printk(TPACPI_ERR "unknown version of the "
3252                                "HKEY interface: 0x%x\n", hkeyv);
3253                         printk(TPACPI_ERR "please report this to %s\n",
3254                                TPACPI_MAIL);
3255                 } else {
3256                         /*
3257                          * MHKV 0x100 in A31, R40, R40e,
3258                          * T4x, X31, and later
3259                          */
3260                         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3261                                 "firmware HKEY interface version: 0x%x\n",
3262                                 hkeyv);
3263
3264                         /* Paranoia check AND init hotkey_all_mask */
3265                         if (!acpi_evalf(hkey_handle, &hotkey_all_mask,
3266                                         "MHKA", "qd")) {
3267                                 printk(TPACPI_ERR
3268                                        "missing MHKA handler, "
3269                                        "please report this to %s\n",
3270                                        TPACPI_MAIL);
3271                                 /* Fallback: pre-init for FN+F3,F4,F12 */
3272                                 hotkey_all_mask = 0x080cU;
3273                         } else {
3274                                 tp_features.hotkey_mask = 1;
3275                         }
3276                 }
3277         }
3278
3279         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3280                 "hotkey masks are %s\n",
3281                 str_supported(tp_features.hotkey_mask));
3282
3283         /* Init hotkey_all_mask if not initialized yet */
3284         if (!tp_features.hotkey_mask && !hotkey_all_mask &&
3285             (quirks & TPACPI_HK_Q_INIMASK))
3286                 hotkey_all_mask = 0x080cU;  /* FN+F12, FN+F4, FN+F3 */
3287
3288         /* Init hotkey_acpi_mask and hotkey_orig_mask */
3289         if (tp_features.hotkey_mask) {
3290                 /* hotkey_source_mask *must* be zero for
3291                  * the first hotkey_mask_get to return hotkey_orig_mask */
3292                 res = hotkey_mask_get();
3293                 if (res)
3294                         goto err_exit;
3295
3296                 hotkey_orig_mask = hotkey_acpi_mask;
3297         } else {
3298                 hotkey_orig_mask = hotkey_all_mask;
3299                 hotkey_acpi_mask = hotkey_all_mask;
3300         }
3301
3302 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3303         if (dbg_wlswemul) {
3304                 tp_features.hotkey_wlsw = 1;
3305                 radiosw_state = !!tpacpi_wlsw_emulstate;
3306                 printk(TPACPI_INFO
3307                         "radio switch emulation enabled\n");
3308         } else
3309 #endif
3310         /* Not all thinkpads have a hardware radio switch */
3311         if (acpi_evalf(hkey_handle, &status, "WLSW", "qd")) {
3312                 tp_features.hotkey_wlsw = 1;
3313                 radiosw_state = !!status;
3314                 printk(TPACPI_INFO
3315                         "radio switch found; radios are %s\n",
3316                         enabled(status, 0));
3317         }
3318         if (tp_features.hotkey_wlsw)
3319                 res = add_to_attr_set(hotkey_dev_attributes,
3320                                 &dev_attr_hotkey_radio_sw.attr);
3321
3322         /* For X41t, X60t, X61t Tablets... */
3323         if (!res && acpi_evalf(hkey_handle, &status, "MHKG", "qd")) {
3324                 tp_features.hotkey_tablet = 1;
3325                 tabletsw_state = !!(status & TP_HOTKEY_TABLET_MASK);
3326                 printk(TPACPI_INFO
3327                         "possible tablet mode switch found; "
3328                         "ThinkPad in %s mode\n",
3329                         (tabletsw_state) ? "tablet" : "laptop");
3330                 res = add_to_attr_set(hotkey_dev_attributes,
3331                                 &dev_attr_hotkey_tablet_mode.attr);
3332         }
3333
3334         if (!res)
3335                 res = register_attr_set_with_sysfs(
3336                                 hotkey_dev_attributes,
3337                                 &tpacpi_pdev->dev.kobj);
3338         if (res)
3339                 goto err_exit;
3340
3341         /* Set up key map */
3342
3343         hotkey_keycode_map = kmalloc(TPACPI_HOTKEY_MAP_SIZE,
3344                                         GFP_KERNEL);
3345         if (!hotkey_keycode_map) {
3346                 printk(TPACPI_ERR
3347                         "failed to allocate memory for key map\n");
3348                 res = -ENOMEM;
3349                 goto err_exit;
3350         }
3351
3352         if (thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO) {
3353                 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3354                            "using Lenovo default hot key map\n");
3355                 memcpy(hotkey_keycode_map, &lenovo_keycode_map,
3356                         TPACPI_HOTKEY_MAP_SIZE);
3357         } else {
3358                 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3359                            "using IBM default hot key map\n");
3360                 memcpy(hotkey_keycode_map, &ibm_keycode_map,
3361                         TPACPI_HOTKEY_MAP_SIZE);
3362         }
3363
3364         input_set_capability(tpacpi_inputdev, EV_MSC, MSC_SCAN);
3365         tpacpi_inputdev->keycodesize = TPACPI_HOTKEY_MAP_TYPESIZE;
3366         tpacpi_inputdev->keycodemax = TPACPI_HOTKEY_MAP_LEN;
3367         tpacpi_inputdev->keycode = hotkey_keycode_map;
3368         for (i = 0; i < TPACPI_HOTKEY_MAP_LEN; i++) {
3369                 if (hotkey_keycode_map[i] != KEY_RESERVED) {
3370                         input_set_capability(tpacpi_inputdev, EV_KEY,
3371                                                 hotkey_keycode_map[i]);
3372                 } else {
3373                         if (i < sizeof(hotkey_reserved_mask)*8)
3374                                 hotkey_reserved_mask |= 1 << i;
3375                 }
3376         }
3377
3378         if (tp_features.hotkey_wlsw) {
3379                 input_set_capability(tpacpi_inputdev, EV_SW, SW_RFKILL_ALL);
3380                 input_report_switch(tpacpi_inputdev,
3381                                     SW_RFKILL_ALL, radiosw_state);
3382         }
3383         if (tp_features.hotkey_tablet) {
3384                 input_set_capability(tpacpi_inputdev, EV_SW, SW_TABLET_MODE);
3385                 input_report_switch(tpacpi_inputdev,
3386                                     SW_TABLET_MODE, tabletsw_state);
3387         }
3388
3389         /* Do not issue duplicate brightness change events to
3390          * userspace */
3391         if (!tp_features.bright_acpimode)
3392                 /* update bright_acpimode... */
3393                 tpacpi_check_std_acpi_brightness_support();
3394
3395         if (tp_features.bright_acpimode && acpi_video_backlight_support()) {
3396                 printk(TPACPI_INFO
3397                        "This ThinkPad has standard ACPI backlight "
3398                        "brightness control, supported by the ACPI "
3399                        "video driver\n");
3400                 printk(TPACPI_NOTICE
3401                        "Disabling thinkpad-acpi brightness events "
3402                        "by default...\n");
3403
3404                 /* Disable brightness up/down on Lenovo thinkpads when
3405                  * ACPI is handling them, otherwise it is plain impossible
3406                  * for userspace to do something even remotely sane */
3407                 hotkey_reserved_mask |=
3408                         (1 << TP_ACPI_HOTKEYSCAN_FNHOME)
3409                         | (1 << TP_ACPI_HOTKEYSCAN_FNEND);
3410                 hotkey_unmap(TP_ACPI_HOTKEYSCAN_FNHOME);
3411                 hotkey_unmap(TP_ACPI_HOTKEYSCAN_FNEND);
3412         }
3413
3414 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
3415         hotkey_source_mask = TPACPI_HKEY_NVRAM_GOOD_MASK
3416                                 & ~hotkey_all_mask
3417                                 & ~hotkey_reserved_mask;
3418
3419         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3420                     "hotkey source mask 0x%08x, polling freq %u\n",
3421                     hotkey_source_mask, hotkey_poll_freq);
3422 #endif
3423
3424         dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3425                         "enabling firmware HKEY event interface...\n");
3426         res = hotkey_status_set(true);
3427         if (res) {
3428                 hotkey_exit();
3429                 return res;
3430         }
3431         res = hotkey_mask_set(((hotkey_all_mask & ~hotkey_reserved_mask)
3432                                | hotkey_driver_mask)
3433                               & ~hotkey_source_mask);
3434         if (res < 0 && res != -ENXIO) {
3435                 hotkey_exit();
3436                 return res;
3437         }
3438         hotkey_user_mask = (hotkey_acpi_mask | hotkey_source_mask)
3439                                 & ~hotkey_reserved_mask;
3440         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3441                 "initial masks: user=0x%08x, fw=0x%08x, poll=0x%08x\n",
3442                 hotkey_user_mask, hotkey_acpi_mask, hotkey_source_mask);
3443
3444         dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3445                         "legacy ibm/hotkey event reporting over procfs %s\n",
3446                         (hotkey_report_mode < 2) ?
3447                                 "enabled" : "disabled");
3448
3449         tpacpi_inputdev->open = &hotkey_inputdev_open;
3450         tpacpi_inputdev->close = &hotkey_inputdev_close;
3451
3452         hotkey_poll_setup_safe(true);
3453
3454         return 0;
3455
3456 err_exit:
3457         delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
3458         hotkey_dev_attributes = NULL;
3459
3460         return (res < 0)? res : 1;
3461 }
3462
3463 static bool hotkey_notify_hotkey(const u32 hkey,
3464                                  bool *send_acpi_ev,
3465                                  bool *ignore_acpi_ev)
3466 {
3467         /* 0x1000-0x1FFF: key presses */
3468         unsigned int scancode = hkey & 0xfff;
3469         *send_acpi_ev = true;
3470         *ignore_acpi_ev = false;
3471
3472         if (scancode > 0 && scancode < 0x21) {
3473                 scancode--;
3474                 if (!(hotkey_source_mask & (1 << scancode))) {
3475                         tpacpi_input_send_key_masked(scancode);
3476                         *send_acpi_ev = false;
3477                 } else {
3478                         *ignore_acpi_ev = true;
3479                 }
3480                 return true;
3481         }
3482         return false;
3483 }
3484
3485 static bool hotkey_notify_wakeup(const u32 hkey,
3486                                  bool *send_acpi_ev,
3487                                  bool *ignore_acpi_ev)
3488 {
3489         /* 0x2000-0x2FFF: Wakeup reason */
3490         *send_acpi_ev = true;
3491         *ignore_acpi_ev = false;
3492
3493         switch (hkey) {
3494         case TP_HKEY_EV_WKUP_S3_UNDOCK: /* suspend, undock */
3495         case TP_HKEY_EV_WKUP_S4_UNDOCK: /* hibernation, undock */
3496                 hotkey_wakeup_reason = TP_ACPI_WAKEUP_UNDOCK;
3497                 *ignore_acpi_ev = true;
3498                 break;
3499
3500         case TP_HKEY_EV_WKUP_S3_BAYEJ: /* suspend, bay eject */
3501         case TP_HKEY_EV_WKUP_S4_BAYEJ: /* hibernation, bay eject */
3502                 hotkey_wakeup_reason = TP_ACPI_WAKEUP_BAYEJ;
3503                 *ignore_acpi_ev = true;
3504                 break;
3505
3506         case TP_HKEY_EV_WKUP_S3_BATLOW: /* Battery on critical low level/S3 */
3507         case TP_HKEY_EV_WKUP_S4_BATLOW: /* Battery on critical low level/S4 */
3508                 printk(TPACPI_ALERT
3509                         "EMERGENCY WAKEUP: battery almost empty\n");
3510                 /* how to auto-heal: */
3511                 /* 2313: woke up from S3, go to S4/S5 */
3512                 /* 2413: woke up from S4, go to S5 */
3513                 break;
3514
3515         default:
3516                 return false;
3517         }
3518
3519         if (hotkey_wakeup_reason != TP_ACPI_WAKEUP_NONE) {
3520                 printk(TPACPI_INFO
3521                        "woke up due to a hot-unplug "
3522                        "request...\n");
3523                 hotkey_wakeup_reason_notify_change();
3524         }
3525         return true;
3526 }
3527
3528 static bool hotkey_notify_usrevent(const u32 hkey,
3529                                  bool *send_acpi_ev,
3530                                  bool *ignore_acpi_ev)
3531 {
3532         /* 0x5000-0x5FFF: human interface helpers */
3533         *send_acpi_ev = true;
3534         *ignore_acpi_ev = false;
3535
3536         switch (hkey) {
3537         case TP_HKEY_EV_PEN_INSERTED:  /* X61t: tablet pen inserted into bay */
3538         case TP_HKEY_EV_PEN_REMOVED:   /* X61t: tablet pen removed from bay */
3539                 return true;
3540
3541         case TP_HKEY_EV_TABLET_TABLET:   /* X41t-X61t: tablet mode */
3542         case TP_HKEY_EV_TABLET_NOTEBOOK: /* X41t-X61t: normal mode */
3543                 tpacpi_input_send_tabletsw();
3544                 hotkey_tablet_mode_notify_change();
3545                 *send_acpi_ev = false;
3546                 return true;
3547
3548         case TP_HKEY_EV_LID_CLOSE:      /* Lid closed */
3549         case TP_HKEY_EV_LID_OPEN:       /* Lid opened */
3550         case TP_HKEY_EV_BRGHT_CHANGED:  /* brightness changed */
3551                 /* do not propagate these events */
3552                 *ignore_acpi_ev = true;
3553                 return true;
3554
3555         default:
3556                 return false;
3557         }
3558 }
3559
3560 static void thermal_dump_all_sensors(void);
3561
3562 static bool hotkey_notify_thermal(const u32 hkey,
3563                                  bool *send_acpi_ev,
3564                                  bool *ignore_acpi_ev)
3565 {
3566         bool known = true;
3567
3568         /* 0x6000-0x6FFF: thermal alarms */
3569         *send_acpi_ev = true;
3570         *ignore_acpi_ev = false;
3571
3572         switch (hkey) {
3573         case TP_HKEY_EV_THM_TABLE_CHANGED:
3574                 printk(TPACPI_INFO
3575                         "EC reports that Thermal Table has changed\n");
3576                 /* recommended action: do nothing, we don't have
3577                  * Lenovo ATM information */
3578                 return true;
3579         case TP_HKEY_EV_ALARM_BAT_HOT:
3580                 printk(TPACPI_CRIT
3581                         "THERMAL ALARM: battery is too hot!\n");
3582                 /* recommended action: warn user through gui */
3583                 break;
3584         case TP_HKEY_EV_ALARM_BAT_XHOT:
3585                 printk(TPACPI_ALERT
3586                         "THERMAL EMERGENCY: battery is extremely hot!\n");
3587                 /* recommended action: immediate sleep/hibernate */
3588                 break;
3589         case TP_HKEY_EV_ALARM_SENSOR_HOT:
3590                 printk(TPACPI_CRIT
3591                         "THERMAL ALARM: "
3592                         "a sensor reports something is too hot!\n");
3593                 /* recommended action: warn user through gui, that */
3594                 /* some internal component is too hot */
3595                 break;
3596         case TP_HKEY_EV_ALARM_SENSOR_XHOT:
3597                 printk(TPACPI_ALERT
3598                         "THERMAL EMERGENCY: "
3599                         "a sensor reports something is extremely hot!\n");
3600                 /* recommended action: immediate sleep/hibernate */
3601                 break;
3602         default:
3603                 printk(TPACPI_ALERT
3604                          "THERMAL ALERT: unknown thermal alarm received\n");
3605                 known = false;
3606         }
3607
3608         thermal_dump_all_sensors();
3609
3610         return known;
3611 }
3612
3613 static void hotkey_notify(struct ibm_struct *ibm, u32 event)
3614 {
3615         u32 hkey;
3616         bool send_acpi_ev;
3617         bool ignore_acpi_ev;
3618         bool known_ev;
3619
3620         if (event != 0x80) {
3621                 printk(TPACPI_ERR
3622                        "unknown HKEY notification event %d\n", event);
3623                 /* forward it to userspace, maybe it knows how to handle it */
3624                 acpi_bus_generate_netlink_event(
3625                                         ibm->acpi->device->pnp.device_class,
3626                                         dev_name(&ibm->acpi->device->dev),
3627                                         event, 0);
3628                 return;
3629         }
3630
3631         while (1) {
3632                 if (!acpi_evalf(hkey_handle, &hkey, "MHKP", "d")) {
3633                         printk(TPACPI_ERR "failed to retrieve HKEY event\n");
3634                         return;
3635                 }
3636
3637                 if (hkey == 0) {
3638                         /* queue empty */
3639                         return;
3640                 }
3641
3642                 send_acpi_ev = true;
3643                 ignore_acpi_ev = false;
3644
3645                 switch (hkey >> 12) {
3646                 case 1:
3647                         /* 0x1000-0x1FFF: key presses */
3648                         known_ev = hotkey_notify_hotkey(hkey, &send_acpi_ev,
3649                                                  &ignore_acpi_ev);
3650                         break;
3651                 case 2:
3652                         /* 0x2000-0x2FFF: Wakeup reason */
3653                         known_ev = hotkey_notify_wakeup(hkey, &send_acpi_ev,
3654                                                  &ignore_acpi_ev);
3655                         break;
3656                 case 3:
3657                         /* 0x3000-0x3FFF: bay-related wakeups */
3658                         if (hkey == TP_HKEY_EV_BAYEJ_ACK) {
3659                                 hotkey_autosleep_ack = 1;
3660                                 printk(TPACPI_INFO
3661                                        "bay ejected\n");
3662                                 hotkey_wakeup_hotunplug_complete_notify_change();
3663                                 known_ev = true;
3664                         } else {
3665                                 known_ev = false;
3666                         }
3667                         break;
3668                 case 4:
3669                         /* 0x4000-0x4FFF: dock-related wakeups */
3670                         if (hkey == TP_HKEY_EV_UNDOCK_ACK) {
3671                                 hotkey_autosleep_ack = 1;
3672                                 printk(TPACPI_INFO
3673                                        "undocked\n");
3674                                 hotkey_wakeup_hotunplug_complete_notify_change();
3675                                 known_ev = true;
3676                         } else {
3677                                 known_ev = false;
3678                         }
3679                         break;
3680                 case 5:
3681                         /* 0x5000-0x5FFF: human interface helpers */
3682                         known_ev = hotkey_notify_usrevent(hkey, &send_acpi_ev,
3683                                                  &ignore_acpi_ev);
3684                         break;
3685                 case 6:
3686                         /* 0x6000-0x6FFF: thermal alarms */
3687                         known_ev = hotkey_notify_thermal(hkey, &send_acpi_ev,
3688                                                  &ignore_acpi_ev);
3689                         break;
3690                 case 7:
3691                         /* 0x7000-0x7FFF: misc */
3692                         if (tp_features.hotkey_wlsw &&
3693                                         hkey == TP_HKEY_EV_RFKILL_CHANGED) {
3694                                 tpacpi_send_radiosw_update();
3695                                 send_acpi_ev = 0;
3696                                 known_ev = true;
3697                                 break;
3698                         }
3699                         /* fallthrough to default */
3700                 default:
3701                         known_ev = false;
3702                 }
3703                 if (!known_ev) {
3704                         printk(TPACPI_NOTICE
3705                                "unhandled HKEY event 0x%04x\n", hkey);
3706                         printk(TPACPI_NOTICE
3707                                "please report the conditions when this "
3708                                "event happened to %s\n", TPACPI_MAIL);
3709                 }
3710
3711                 /* Legacy events */
3712                 if (!ignore_acpi_ev &&
3713                     (send_acpi_ev || hotkey_report_mode < 2)) {
3714                         acpi_bus_generate_proc_event(ibm->acpi->device,
3715                                                      event, hkey);
3716                 }
3717
3718                 /* netlink events */
3719                 if (!ignore_acpi_ev && send_acpi_ev) {
3720                         acpi_bus_generate_netlink_event(
3721                                         ibm->acpi->device->pnp.device_class,
3722                                         dev_name(&ibm->acpi->device->dev),
3723                                         event, hkey);
3724                 }
3725         }
3726 }
3727
3728 static void hotkey_suspend(pm_message_t state)
3729 {
3730         /* Do these on suspend, we get the events on early resume! */
3731         hotkey_wakeup_reason = TP_ACPI_WAKEUP_NONE;
3732         hotkey_autosleep_ack = 0;
3733 }
3734
3735 static void hotkey_resume(void)
3736 {
3737         tpacpi_disable_brightness_delay();
3738
3739         if (hotkey_status_set(true) < 0 ||
3740             hotkey_mask_set(hotkey_acpi_mask) < 0)
3741                 printk(TPACPI_ERR
3742                        "error while attempting to reset the event "
3743                        "firmware interface\n");
3744
3745         tpacpi_send_radiosw_update();
3746         hotkey_tablet_mode_notify_change();
3747         hotkey_wakeup_reason_notify_change();
3748         hotkey_wakeup_hotunplug_complete_notify_change();
3749         hotkey_poll_setup_safe(false);
3750 }
3751
3752 /* procfs -------------------------------------------------------------- */
3753 static int hotkey_read(struct seq_file *m)
3754 {
3755         int res, status;
3756
3757         if (!tp_features.hotkey) {
3758                 seq_printf(m, "status:\t\tnot supported\n");
3759                 return 0;
3760         }
3761
3762         if (mutex_lock_killable(&hotkey_mutex))
3763                 return -ERESTARTSYS;
3764         res = hotkey_status_get(&status);
3765         if (!res)
3766                 res = hotkey_mask_get();
3767         mutex_unlock(&hotkey_mutex);
3768         if (res)
3769                 return res;
3770
3771         seq_printf(m, "status:\t\t%s\n", enabled(status, 0));
3772         if (hotkey_all_mask) {
3773                 seq_printf(m, "mask:\t\t0x%08x\n", hotkey_user_mask);
3774                 seq_printf(m, "commands:\tenable, disable, reset, <mask>\n");
3775         } else {
3776                 seq_printf(m, "mask:\t\tnot supported\n");
3777                 seq_printf(m, "commands:\tenable, disable, reset\n");
3778         }
3779
3780         return 0;
3781 }
3782
3783 static void hotkey_enabledisable_warn(bool enable)
3784 {
3785         tpacpi_log_usertask("procfs hotkey enable/disable");
3786         if (!WARN((tpacpi_lifecycle == TPACPI_LIFE_RUNNING || !enable),
3787                         TPACPI_WARN
3788                         "hotkey enable/disable functionality has been "
3789                         "removed from the driver.  Hotkeys are always "
3790                         "enabled\n"))
3791                 printk(TPACPI_ERR
3792                         "Please remove the hotkey=enable module "
3793                         "parameter, it is deprecated.  Hotkeys are always "
3794                         "enabled\n");
3795 }
3796
3797 static int hotkey_write(char *buf)
3798 {
3799         int res;
3800         u32 mask;
3801         char *cmd;
3802
3803         if (!tp_features.hotkey)
3804                 return -ENODEV;
3805
3806         if (mutex_lock_killable(&hotkey_mutex))
3807                 return -ERESTARTSYS;
3808
3809         mask = hotkey_user_mask;
3810
3811         res = 0;
3812         while ((cmd = next_cmd(&buf))) {
3813                 if (strlencmp(cmd, "enable") == 0) {
3814                         hotkey_enabledisable_warn(1);
3815                 } else if (strlencmp(cmd, "disable") == 0) {
3816                         hotkey_enabledisable_warn(0);
3817                         res = -EPERM;
3818                 } else if (strlencmp(cmd, "reset") == 0) {
3819                         mask = (hotkey_all_mask | hotkey_source_mask)
3820                                 & ~hotkey_reserved_mask;
3821                 } else if (sscanf(cmd, "0x%x", &mask) == 1) {
3822                         /* mask set */
3823                 } else if (sscanf(cmd, "%x", &mask) == 1) {
3824                         /* mask set */
3825                 } else {
3826                         res = -EINVAL;
3827                         goto errexit;
3828                 }
3829         }
3830
3831         if (!res) {
3832                 tpacpi_disclose_usertask("procfs hotkey",
3833                         "set mask to 0x%08x\n", mask);
3834                 res = hotkey_user_mask_set(mask);
3835         }
3836
3837 errexit:
3838         mutex_unlock(&hotkey_mutex);
3839         return res;
3840 }
3841
3842 static const struct acpi_device_id ibm_htk_device_ids[] = {
3843         {TPACPI_ACPI_HKEY_HID, 0},
3844         {"", 0},
3845 };
3846
3847 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver = {
3848         .hid = ibm_htk_device_ids,
3849         .notify = hotkey_notify,
3850         .handle = &hkey_handle,
3851         .type = ACPI_DEVICE_NOTIFY,
3852 };
3853
3854 static struct ibm_struct hotkey_driver_data = {
3855         .name = "hotkey",
3856         .read = hotkey_read,
3857         .write = hotkey_write,
3858         .exit = hotkey_exit,
3859         .resume = hotkey_resume,
3860         .suspend = hotkey_suspend,
3861         .acpi = &ibm_hotkey_acpidriver,
3862 };
3863
3864 /*************************************************************************
3865  * Bluetooth subdriver
3866  */
3867
3868 enum {
3869         /* ACPI GBDC/SBDC bits */
3870         TP_ACPI_BLUETOOTH_HWPRESENT     = 0x01, /* Bluetooth hw available */
3871         TP_ACPI_BLUETOOTH_RADIOSSW      = 0x02, /* Bluetooth radio enabled */
3872         TP_ACPI_BLUETOOTH_RESUMECTRL    = 0x04, /* Bluetooth state at resume:
3873                                                    off / last state */
3874 };
3875
3876 enum {
3877         /* ACPI \BLTH commands */
3878         TP_ACPI_BLTH_GET_ULTRAPORT_ID   = 0x00, /* Get Ultraport BT ID */
3879         TP_ACPI_BLTH_GET_PWR_ON_RESUME  = 0x01, /* Get power-on-resume state */
3880         TP_ACPI_BLTH_PWR_ON_ON_RESUME   = 0x02, /* Resume powered on */
3881         TP_ACPI_BLTH_PWR_OFF_ON_RESUME  = 0x03, /* Resume powered off */
3882         TP_ACPI_BLTH_SAVE_STATE         = 0x05, /* Save state for S4/S5 */
3883 };
3884
3885 #define TPACPI_RFK_BLUETOOTH_SW_NAME    "tpacpi_bluetooth_sw"
3886
3887 static int bluetooth_get_status(void)
3888 {
3889         int status;
3890
3891 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3892         if (dbg_bluetoothemul)
3893                 return (tpacpi_bluetooth_emulstate) ?
3894                        TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
3895 #endif
3896
3897         if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
3898                 return -EIO;
3899
3900         return ((status & TP_ACPI_BLUETOOTH_RADIOSSW) != 0) ?
3901                         TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
3902 }
3903
3904 static int bluetooth_set_status(enum tpacpi_rfkill_state state)
3905 {
3906         int status;
3907
3908         vdbg_printk(TPACPI_DBG_RFKILL,
3909                 "will attempt to %s bluetooth\n",
3910                 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable");
3911
3912 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3913         if (dbg_bluetoothemul) {
3914                 tpacpi_bluetooth_emulstate = (state == TPACPI_RFK_RADIO_ON);
3915                 return 0;
3916         }
3917 #endif
3918
3919         /* We make sure to keep TP_ACPI_BLUETOOTH_RESUMECTRL off */
3920         status = TP_ACPI_BLUETOOTH_RESUMECTRL;
3921         if (state == TPACPI_RFK_RADIO_ON)
3922                 status |= TP_ACPI_BLUETOOTH_RADIOSSW;
3923
3924         if (!acpi_evalf(hkey_handle, NULL, "SBDC", "vd", status))
3925                 return -EIO;
3926
3927         return 0;
3928 }
3929
3930 /* sysfs bluetooth enable ---------------------------------------------- */
3931 static ssize_t bluetooth_enable_show(struct device *dev,
3932                            struct device_attribute *attr,
3933                            char *buf)
3934 {
3935         return tpacpi_rfk_sysfs_enable_show(TPACPI_RFK_BLUETOOTH_SW_ID,
3936                         attr, buf);
3937 }
3938
3939 static ssize_t bluetooth_enable_store(struct device *dev,
3940                             struct device_attribute *attr,
3941                             const char *buf, size_t count)
3942 {
3943         return tpacpi_rfk_sysfs_enable_store(TPACPI_RFK_BLUETOOTH_SW_ID,
3944                                 attr, buf, count);
3945 }
3946
3947 static struct device_attribute dev_attr_bluetooth_enable =
3948         __ATTR(bluetooth_enable, S_IWUSR | S_IRUGO,
3949                 bluetooth_enable_show, bluetooth_enable_store);
3950
3951 /* --------------------------------------------------------------------- */
3952
3953 static struct attribute *bluetooth_attributes[] = {
3954         &dev_attr_bluetooth_enable.attr,
3955         NULL
3956 };
3957
3958 static const struct attribute_group bluetooth_attr_group = {
3959         .attrs = bluetooth_attributes,
3960 };
3961
3962 static const struct tpacpi_rfk_ops bluetooth_tprfk_ops = {
3963         .get_status = bluetooth_get_status,
3964         .set_status = bluetooth_set_status,
3965 };
3966
3967 static void bluetooth_shutdown(void)
3968 {
3969         /* Order firmware to save current state to NVRAM */
3970         if (!acpi_evalf(NULL, NULL, "\\BLTH", "vd",
3971                         TP_ACPI_BLTH_SAVE_STATE))
3972                 printk(TPACPI_NOTICE
3973                         "failed to save bluetooth state to NVRAM\n");
3974         else
3975                 vdbg_printk(TPACPI_DBG_RFKILL,
3976                         "bluestooth state saved to NVRAM\n");
3977 }
3978
3979 static void bluetooth_exit(void)
3980 {
3981         sysfs_remove_group(&tpacpi_pdev->dev.kobj,
3982                         &bluetooth_attr_group);
3983
3984         tpacpi_destroy_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID);
3985
3986         bluetooth_shutdown();
3987 }
3988
3989 static int __init bluetooth_init(struct ibm_init_struct *iibm)
3990 {
3991         int res;
3992         int status = 0;
3993
3994         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
3995                         "initializing bluetooth subdriver\n");
3996
3997         TPACPI_ACPIHANDLE_INIT(hkey);
3998
3999         /* bluetooth not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
4000            G4x, R30, R31, R40e, R50e, T20-22, X20-21 */
4001         tp_features.bluetooth = hkey_handle &&
4002             acpi_evalf(hkey_handle, &status, "GBDC", "qd");
4003
4004         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4005                 "bluetooth is %s, status 0x%02x\n",
4006                 str_supported(tp_features.bluetooth),
4007                 status);
4008
4009 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4010         if (dbg_bluetoothemul) {
4011                 tp_features.bluetooth = 1;
4012                 printk(TPACPI_INFO
4013                         "bluetooth switch emulation enabled\n");
4014         } else
4015 #endif
4016         if (tp_features.bluetooth &&
4017             !(status & TP_ACPI_BLUETOOTH_HWPRESENT)) {
4018                 /* no bluetooth hardware present in system */
4019                 tp_features.bluetooth = 0;
4020                 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4021                            "bluetooth hardware not installed\n");
4022         }
4023
4024         if (!tp_features.bluetooth)
4025                 return 1;
4026
4027         res = tpacpi_new_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID,
4028                                 &bluetooth_tprfk_ops,
4029                                 RFKILL_TYPE_BLUETOOTH,
4030                                 TPACPI_RFK_BLUETOOTH_SW_NAME,
4031                                 true);
4032         if (res)
4033                 return res;
4034
4035         res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
4036                                 &bluetooth_attr_group);
4037         if (res) {
4038                 tpacpi_destroy_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID);
4039                 return res;
4040         }
4041
4042         return 0;
4043 }
4044
4045 /* procfs -------------------------------------------------------------- */
4046 static int bluetooth_read(struct seq_file *m)
4047 {
4048         return tpacpi_rfk_procfs_read(TPACPI_RFK_BLUETOOTH_SW_ID, m);
4049 }
4050
4051 static int bluetooth_write(char *buf)
4052 {
4053         return tpacpi_rfk_procfs_write(TPACPI_RFK_BLUETOOTH_SW_ID, buf);
4054 }
4055
4056 static struct ibm_struct bluetooth_driver_data = {
4057         .name = "bluetooth",
4058         .read = bluetooth_read,
4059         .write = bluetooth_write,
4060         .exit = bluetooth_exit,
4061         .shutdown = bluetooth_shutdown,
4062 };
4063
4064 /*************************************************************************
4065  * Wan subdriver
4066  */
4067
4068 enum {
4069         /* ACPI GWAN/SWAN bits */
4070         TP_ACPI_WANCARD_HWPRESENT       = 0x01, /* Wan hw available */
4071         TP_ACPI_WANCARD_RADIOSSW        = 0x02, /* Wan radio enabled */
4072         TP_ACPI_WANCARD_RESUMECTRL      = 0x04, /* Wan state at resume:
4073                                                    off / last state */
4074 };
4075
4076 #define TPACPI_RFK_WWAN_SW_NAME         "tpacpi_wwan_sw"
4077
4078 static int wan_get_status(void)
4079 {
4080         int status;
4081
4082 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4083         if (dbg_wwanemul)
4084                 return (tpacpi_wwan_emulstate) ?
4085                        TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4086 #endif
4087
4088         if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
4089                 return -EIO;
4090
4091         return ((status & TP_ACPI_WANCARD_RADIOSSW) != 0) ?
4092                         TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4093 }
4094
4095 static int wan_set_status(enum tpacpi_rfkill_state state)
4096 {
4097         int status;
4098
4099         vdbg_printk(TPACPI_DBG_RFKILL,
4100                 "will attempt to %s wwan\n",
4101                 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable");
4102
4103 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4104         if (dbg_wwanemul) {
4105                 tpacpi_wwan_emulstate = (state == TPACPI_RFK_RADIO_ON);
4106                 return 0;
4107         }
4108 #endif
4109
4110         /* We make sure to set TP_ACPI_WANCARD_RESUMECTRL */
4111         status = TP_ACPI_WANCARD_RESUMECTRL;
4112         if (state == TPACPI_RFK_RADIO_ON)
4113                 status |= TP_ACPI_WANCARD_RADIOSSW;
4114
4115         if (!acpi_evalf(hkey_handle, NULL, "SWAN", "vd", status))
4116                 return -EIO;
4117
4118         return 0;
4119 }
4120
4121 /* sysfs wan enable ---------------------------------------------------- */
4122 static ssize_t wan_enable_show(struct device *dev,
4123                            struct device_attribute *attr,
4124                            char *buf)
4125 {
4126         return tpacpi_rfk_sysfs_enable_show(TPACPI_RFK_WWAN_SW_ID,
4127                         attr, buf);
4128 }
4129
4130 static ssize_t wan_enable_store(struct device *dev,
4131                             struct device_attribute *attr,
4132                             const char *buf, size_t count)
4133 {
4134         return tpacpi_rfk_sysfs_enable_store(TPACPI_RFK_WWAN_SW_ID,
4135                         attr, buf, count);
4136 }
4137
4138 static struct device_attribute dev_attr_wan_enable =
4139         __ATTR(wwan_enable, S_IWUSR | S_IRUGO,
4140                 wan_enable_show, wan_enable_store);
4141
4142 /* --------------------------------------------------------------------- */
4143
4144 static struct attribute *wan_attributes[] = {
4145         &dev_attr_wan_enable.attr,
4146         NULL
4147 };
4148
4149 static const struct attribute_group wan_attr_group = {
4150         .attrs = wan_attributes,
4151 };
4152
4153 static const struct tpacpi_rfk_ops wan_tprfk_ops = {
4154         .get_status = wan_get_status,
4155         .set_status = wan_set_status,
4156 };
4157
4158 static void wan_shutdown(void)
4159 {
4160         /* Order firmware to save current state to NVRAM */
4161         if (!acpi_evalf(NULL, NULL, "\\WGSV", "vd",
4162                         TP_ACPI_WGSV_SAVE_STATE))
4163                 printk(TPACPI_NOTICE
4164                         "failed to save WWAN state to NVRAM\n");
4165         else
4166                 vdbg_printk(TPACPI_DBG_RFKILL,
4167                         "WWAN state saved to NVRAM\n");
4168 }
4169
4170 static void wan_exit(void)
4171 {
4172         sysfs_remove_group(&tpacpi_pdev->dev.kobj,
4173                 &wan_attr_group);
4174
4175         tpacpi_destroy_rfkill(TPACPI_RFK_WWAN_SW_ID);
4176
4177         wan_shutdown();
4178 }
4179
4180 static int __init wan_init(struct ibm_init_struct *iibm)
4181 {
4182         int res;
4183         int status = 0;
4184
4185         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4186                         "initializing wan subdriver\n");
4187
4188         TPACPI_ACPIHANDLE_INIT(hkey);
4189
4190         tp_features.wan = hkey_handle &&
4191             acpi_evalf(hkey_handle, &status, "GWAN", "qd");
4192
4193         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4194                 "wan is %s, status 0x%02x\n",
4195                 str_supported(tp_features.wan),
4196                 status);
4197
4198 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4199         if (dbg_wwanemul) {
4200                 tp_features.wan = 1;
4201                 printk(TPACPI_INFO
4202                         "wwan switch emulation enabled\n");
4203         } else
4204 #endif
4205         if (tp_features.wan &&
4206             !(status & TP_ACPI_WANCARD_HWPRESENT)) {
4207                 /* no wan hardware present in system */
4208                 tp_features.wan = 0;
4209                 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4210                            "wan hardware not installed\n");
4211         }
4212
4213         if (!tp_features.wan)
4214                 return 1;
4215
4216         res = tpacpi_new_rfkill(TPACPI_RFK_WWAN_SW_ID,
4217                                 &wan_tprfk_ops,
4218                                 RFKILL_TYPE_WWAN,
4219                                 TPACPI_RFK_WWAN_SW_NAME,
4220                                 true);
4221         if (res)
4222                 return res;
4223
4224         res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
4225                                 &wan_attr_group);
4226
4227         if (res) {
4228                 tpacpi_destroy_rfkill(TPACPI_RFK_WWAN_SW_ID);
4229                 return res;
4230         }
4231
4232         return 0;
4233 }
4234
4235 /* procfs -------------------------------------------------------------- */
4236 static int wan_read(struct seq_file *m)
4237 {
4238         return tpacpi_rfk_procfs_read(TPACPI_RFK_WWAN_SW_ID, m);
4239 }
4240
4241 static int wan_write(char *buf)
4242 {
4243         return tpacpi_rfk_procfs_write(TPACPI_RFK_WWAN_SW_ID, buf);
4244 }
4245
4246 static struct ibm_struct wan_driver_data = {
4247         .name = "wan",
4248         .read = wan_read,
4249         .write = wan_write,
4250         .exit = wan_exit,
4251         .shutdown = wan_shutdown,
4252 };
4253
4254 /*************************************************************************
4255  * UWB subdriver
4256  */
4257
4258 enum {
4259         /* ACPI GUWB/SUWB bits */
4260         TP_ACPI_UWB_HWPRESENT   = 0x01, /* UWB hw available */
4261         TP_ACPI_UWB_RADIOSSW    = 0x02, /* UWB radio enabled */
4262 };
4263
4264 #define TPACPI_RFK_UWB_SW_NAME  "tpacpi_uwb_sw"
4265
4266 static int uwb_get_status(void)
4267 {
4268         int status;
4269
4270 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4271         if (dbg_uwbemul)
4272                 return (tpacpi_uwb_emulstate) ?
4273                        TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4274 #endif
4275
4276         if (!acpi_evalf(hkey_handle, &status, "GUWB", "d"))
4277                 return -EIO;
4278
4279         return ((status & TP_ACPI_UWB_RADIOSSW) != 0) ?
4280                         TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4281 }
4282
4283 static int uwb_set_status(enum tpacpi_rfkill_state state)
4284 {
4285         int status;
4286
4287         vdbg_printk(TPACPI_DBG_RFKILL,
4288                 "will attempt to %s UWB\n",
4289                 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable");
4290
4291 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4292         if (dbg_uwbemul) {
4293                 tpacpi_uwb_emulstate = (state == TPACPI_RFK_RADIO_ON);
4294                 return 0;
4295         }
4296 #endif
4297
4298         if (state == TPACPI_RFK_RADIO_ON)
4299                 status = TP_ACPI_UWB_RADIOSSW;
4300         else
4301                 status = 0;
4302
4303         if (!acpi_evalf(hkey_handle, NULL, "SUWB", "vd", status))
4304                 return -EIO;
4305
4306         return 0;
4307 }
4308
4309 /* --------------------------------------------------------------------- */
4310
4311 static const struct tpacpi_rfk_ops uwb_tprfk_ops = {
4312         .get_status = uwb_get_status,
4313         .set_status = uwb_set_status,
4314 };
4315
4316 static void uwb_exit(void)
4317 {
4318         tpacpi_destroy_rfkill(TPACPI_RFK_UWB_SW_ID);
4319 }
4320
4321 static int __init uwb_init(struct ibm_init_struct *iibm)
4322 {
4323         int res;
4324         int status = 0;
4325
4326         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4327                         "initializing uwb subdriver\n");
4328
4329         TPACPI_ACPIHANDLE_INIT(hkey);
4330
4331         tp_features.uwb = hkey_handle &&
4332             acpi_evalf(hkey_handle, &status, "GUWB", "qd");
4333
4334         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4335                 "uwb is %s, status 0x%02x\n",
4336                 str_supported(tp_features.uwb),
4337                 status);
4338
4339 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4340         if (dbg_uwbemul) {
4341                 tp_features.uwb = 1;
4342                 printk(TPACPI_INFO
4343                         "uwb switch emulation enabled\n");
4344         } else
4345 #endif
4346         if (tp_features.uwb &&
4347             !(status & TP_ACPI_UWB_HWPRESENT)) {
4348                 /* no uwb hardware present in system */
4349                 tp_features.uwb = 0;
4350                 dbg_printk(TPACPI_DBG_INIT,
4351                            "uwb hardware not installed\n");
4352         }
4353
4354         if (!tp_features.uwb)
4355                 return 1;
4356
4357         res = tpacpi_new_rfkill(TPACPI_RFK_UWB_SW_ID,
4358                                 &uwb_tprfk_ops,
4359                                 RFKILL_TYPE_UWB,
4360                                 TPACPI_RFK_UWB_SW_NAME,
4361                                 false);
4362         return res;
4363 }
4364
4365 static struct ibm_struct uwb_driver_data = {
4366         .name = "uwb",
4367         .exit = uwb_exit,
4368         .flags.experimental = 1,
4369 };
4370
4371 /*************************************************************************
4372  * Video subdriver
4373  */
4374
4375 #ifdef CONFIG_THINKPAD_ACPI_VIDEO
4376
4377 enum video_access_mode {
4378         TPACPI_VIDEO_NONE = 0,
4379         TPACPI_VIDEO_570,       /* 570 */
4380         TPACPI_VIDEO_770,       /* 600e/x, 770e, 770x */
4381         TPACPI_VIDEO_NEW,       /* all others */
4382 };
4383
4384 enum {  /* video status flags, based on VIDEO_570 */
4385         TP_ACPI_VIDEO_S_LCD = 0x01,     /* LCD output enabled */
4386         TP_ACPI_VIDEO_S_CRT = 0x02,     /* CRT output enabled */
4387         TP_ACPI_VIDEO_S_DVI = 0x08,     /* DVI output enabled */
4388 };
4389
4390 enum {  /* TPACPI_VIDEO_570 constants */
4391         TP_ACPI_VIDEO_570_PHSCMD = 0x87,        /* unknown magic constant :( */
4392         TP_ACPI_VIDEO_570_PHSMASK = 0x03,       /* PHS bits that map to
4393                                                  * video_status_flags */
4394         TP_ACPI_VIDEO_570_PHS2CMD = 0x8b,       /* unknown magic constant :( */
4395         TP_ACPI_VIDEO_570_PHS2SET = 0x80,       /* unknown magic constant :( */
4396 };
4397
4398 static enum video_access_mode video_supported;
4399 static int video_orig_autosw;
4400
4401 static int video_autosw_get(void);
4402 static int video_autosw_set(int enable);
4403
4404 TPACPI_HANDLE(vid2, root, "\\_SB.PCI0.AGPB.VID");       /* G41 */
4405
4406 static int __init video_init(struct ibm_init_struct *iibm)
4407 {
4408         int ivga;
4409
4410         vdbg_printk(TPACPI_DBG_INIT, "initializing video subdriver\n");
4411
4412         TPACPI_ACPIHANDLE_INIT(vid);
4413         TPACPI_ACPIHANDLE_INIT(vid2);
4414
4415         if (vid2_handle && acpi_evalf(NULL, &ivga, "\\IVGA", "d") && ivga)
4416                 /* G41, assume IVGA doesn't change */
4417                 vid_handle = vid2_handle;
4418
4419         if (!vid_handle)
4420                 /* video switching not supported on R30, R31 */
4421                 video_supported = TPACPI_VIDEO_NONE;
4422         else if (acpi_evalf(vid_handle, &video_orig_autosw, "SWIT", "qd"))
4423                 /* 570 */
4424                 video_supported = TPACPI_VIDEO_570;
4425         else if (acpi_evalf(vid_handle, &video_orig_autosw, "^VADL", "qd"))
4426                 /* 600e/x, 770e, 770x */
4427                 video_supported = TPACPI_VIDEO_770;
4428         else
4429                 /* all others */
4430                 video_supported = TPACPI_VIDEO_NEW;
4431
4432         vdbg_printk(TPACPI_DBG_INIT, "video is %s, mode %d\n",
4433                 str_supported(video_supported != TPACPI_VIDEO_NONE),
4434                 video_supported);
4435
4436         return (video_supported != TPACPI_VIDEO_NONE)? 0 : 1;
4437 }
4438
4439 static void video_exit(void)
4440 {
4441         dbg_printk(TPACPI_DBG_EXIT,
4442                    "restoring original video autoswitch mode\n");
4443         if (video_autosw_set(video_orig_autosw))
4444                 printk(TPACPI_ERR "error while trying to restore original "
4445                         "video autoswitch mode\n");
4446 }
4447
4448 static int video_outputsw_get(void)
4449 {
4450         int status = 0;
4451         int i;
4452
4453         switch (video_supported) {
4454         case TPACPI_VIDEO_570:
4455                 if (!acpi_evalf(NULL, &i, "\\_SB.PHS", "dd",
4456                                  TP_ACPI_VIDEO_570_PHSCMD))
4457                         return -EIO;
4458                 status = i & TP_ACPI_VIDEO_570_PHSMASK;
4459                 break;
4460         case TPACPI_VIDEO_770:
4461                 if (!acpi_evalf(NULL, &i, "\\VCDL", "d"))
4462                         return -EIO;
4463                 if (i)
4464                         status |= TP_ACPI_VIDEO_S_LCD;
4465                 if (!acpi_evalf(NULL, &i, "\\VCDC", "d"))
4466                         return -EIO;
4467                 if (i)
4468                         status |= TP_ACPI_VIDEO_S_CRT;
4469                 break;
4470         case TPACPI_VIDEO_NEW:
4471                 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 1) ||
4472                     !acpi_evalf(NULL, &i, "\\VCDC", "d"))
4473                         return -EIO;
4474                 if (i)
4475                         status |= TP_ACPI_VIDEO_S_CRT;
4476
4477                 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0) ||
4478                     !acpi_evalf(NULL, &i, "\\VCDL", "d"))
4479                         return -EIO;
4480                 if (i)
4481                         status |= TP_ACPI_VIDEO_S_LCD;
4482                 if (!acpi_evalf(NULL, &i, "\\VCDD", "d"))
4483                         return -EIO;
4484                 if (i)
4485                         status |= TP_ACPI_VIDEO_S_DVI;
4486                 break;
4487         default:
4488                 return -ENOSYS;
4489         }
4490
4491         return status;
4492 }
4493
4494 static int video_outputsw_set(int status)
4495 {
4496         int autosw;
4497         int res = 0;
4498
4499         switch (video_supported) {
4500         case TPACPI_VIDEO_570:
4501                 res = acpi_evalf(NULL, NULL,
4502                                  "\\_SB.PHS2", "vdd",
4503                                  TP_ACPI_VIDEO_570_PHS2CMD,
4504                                  status | TP_ACPI_VIDEO_570_PHS2SET);
4505                 break;
4506         case TPACPI_VIDEO_770:
4507                 autosw = video_autosw_get();
4508                 if (autosw < 0)
4509                         return autosw;
4510
4511                 res = video_autosw_set(1);
4512                 if (res)
4513                         return res;
4514                 res = acpi_evalf(vid_handle, NULL,
4515                                  "ASWT", "vdd", status * 0x100, 0);
4516                 if (!autosw && video_autosw_set(autosw)) {
4517                         printk(TPACPI_ERR
4518                                "video auto-switch left enabled due to error\n");
4519                         return -EIO;
4520                 }
4521                 break;
4522         case TPACPI_VIDEO_NEW:
4523                 res = acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0x80) &&
4524                       acpi_evalf(NULL, NULL, "\\VSDS", "vdd", status, 1);
4525                 break;
4526         default:
4527                 return -ENOSYS;
4528         }
4529
4530         return (res)? 0 : -EIO;
4531 }
4532
4533 static int video_autosw_get(void)
4534 {
4535         int autosw = 0;
4536
4537         switch (video_supported) {
4538         case TPACPI_VIDEO_570:
4539                 if (!acpi_evalf(vid_handle, &autosw, "SWIT", "d"))
4540                         return -EIO;
4541                 break;
4542         case TPACPI_VIDEO_770:
4543         case TPACPI_VIDEO_NEW:
4544                 if (!acpi_evalf(vid_handle, &autosw, "^VDEE", "d"))
4545                         return -EIO;
4546                 break;
4547         default:
4548                 return -ENOSYS;
4549         }
4550
4551         return autosw & 1;
4552 }
4553
4554 static int video_autosw_set(int enable)
4555 {
4556         if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", (enable)? 1 : 0))
4557                 return -EIO;
4558         return 0;
4559 }
4560
4561 static int video_outputsw_cycle(void)
4562 {
4563         int autosw = video_autosw_get();
4564         int res;
4565
4566         if (autosw < 0)
4567                 return autosw;
4568
4569         switch (video_supported) {
4570         case TPACPI_VIDEO_570:
4571                 res = video_autosw_set(1);
4572                 if (res)
4573                         return res;
4574                 res = acpi_evalf(ec_handle, NULL, "_Q16", "v");
4575                 break;
4576         case TPACPI_VIDEO_770:
4577         case TPACPI_VIDEO_NEW:
4578                 res = video_autosw_set(1);
4579                 if (res)
4580                         return res;
4581                 res = acpi_evalf(vid_handle, NULL, "VSWT", "v");
4582                 break;
4583         default:
4584                 return -ENOSYS;
4585         }
4586         if (!autosw && video_autosw_set(autosw)) {
4587                 printk(TPACPI_ERR
4588                        "video auto-switch left enabled due to error\n");
4589                 return -EIO;
4590         }
4591
4592         return (res)? 0 : -EIO;
4593 }
4594
4595 static int video_expand_toggle(void)
4596 {
4597         switch (video_supported) {
4598         case TPACPI_VIDEO_570:
4599                 return acpi_evalf(ec_handle, NULL, "_Q17", "v")?
4600                         0 : -EIO;
4601         case TPACPI_VIDEO_770:
4602                 return acpi_evalf(vid_handle, NULL, "VEXP", "v")?
4603                         0 : -EIO;
4604         case TPACPI_VIDEO_NEW:
4605                 return acpi_evalf(NULL, NULL, "\\VEXP", "v")?
4606                         0 : -EIO;
4607         default:
4608                 return -ENOSYS;
4609         }
4610         /* not reached */
4611 }
4612
4613 static int video_read(struct seq_file *m)
4614 {
4615         int status, autosw;
4616
4617         if (video_supported == TPACPI_VIDEO_NONE) {
4618                 seq_printf(m, "status:\t\tnot supported\n");
4619                 return 0;
4620         }
4621
4622         status = video_outputsw_get();
4623         if (status < 0)
4624                 return status;
4625
4626         autosw = video_autosw_get();
4627         if (autosw < 0)
4628                 return autosw;
4629
4630         seq_printf(m, "status:\t\tsupported\n");
4631         seq_printf(m, "lcd:\t\t%s\n", enabled(status, 0));
4632         seq_printf(m, "crt:\t\t%s\n", enabled(status, 1));
4633         if (video_supported == TPACPI_VIDEO_NEW)
4634                 seq_printf(m, "dvi:\t\t%s\n", enabled(status, 3));
4635         seq_printf(m, "auto:\t\t%s\n", enabled(autosw, 0));
4636         seq_printf(m, "commands:\tlcd_enable, lcd_disable\n");
4637         seq_printf(m, "commands:\tcrt_enable, crt_disable\n");
4638         if (video_supported == TPACPI_VIDEO_NEW)
4639                 seq_printf(m, "commands:\tdvi_enable, dvi_disable\n");
4640         seq_printf(m, "commands:\tauto_enable, auto_disable\n");
4641         seq_printf(m, "commands:\tvideo_switch, expand_toggle\n");
4642
4643         return 0;
4644 }
4645
4646 static int video_write(char *buf)
4647 {
4648         char *cmd;
4649         int enable, disable, status;
4650         int res;
4651
4652         if (video_supported == TPACPI_VIDEO_NONE)
4653                 return -ENODEV;
4654
4655         enable = 0;
4656         disable = 0;
4657
4658         while ((cmd = next_cmd(&buf))) {
4659                 if (strlencmp(cmd, "lcd_enable") == 0) {
4660                         enable |= TP_ACPI_VIDEO_S_LCD;
4661                 } else if (strlencmp(cmd, "lcd_disable") == 0) {
4662                         disable |= TP_ACPI_VIDEO_S_LCD;
4663                 } else if (strlencmp(cmd, "crt_enable") == 0) {
4664                         enable |= TP_ACPI_VIDEO_S_CRT;
4665                 } else if (strlencmp(cmd, "crt_disable") == 0) {
4666                         disable |= TP_ACPI_VIDEO_S_CRT;
4667                 } else if (video_supported == TPACPI_VIDEO_NEW &&
4668                            strlencmp(cmd, "dvi_enable") == 0) {
4669                         enable |= TP_ACPI_VIDEO_S_DVI;
4670                 } else if (video_supported == TPACPI_VIDEO_NEW &&
4671                            strlencmp(cmd, "dvi_disable") == 0) {
4672                         disable |= TP_ACPI_VIDEO_S_DVI;
4673                 } else if (strlencmp(cmd, "auto_enable") == 0) {
4674                         res = video_autosw_set(1);
4675                         if (res)
4676                                 return res;
4677                 } else if (strlencmp(cmd, "auto_disable") == 0) {
4678                         res = video_autosw_set(0);
4679                         if (res)
4680                                 return res;
4681                 } else if (strlencmp(cmd, "video_switch") == 0) {
4682                         res = video_outputsw_cycle();
4683                         if (res)
4684                                 return res;
4685                 } else if (strlencmp(cmd, "expand_toggle") == 0) {
4686                         res = video_expand_toggle();
4687                         if (res)
4688                                 return res;
4689                 } else
4690                         return -EINVAL;
4691         }
4692
4693         if (enable || disable) {
4694                 status = video_outputsw_get();
4695                 if (status < 0)
4696                         return status;
4697                 res = video_outputsw_set((status & ~disable) | enable);
4698                 if (res)
4699                         return res;
4700         }
4701
4702         return 0;
4703 }
4704
4705 static struct ibm_struct video_driver_data = {
4706         .name = "video",
4707         .read = video_read,
4708         .write = video_write,
4709         .exit = video_exit,
4710 };
4711
4712 #endif /* CONFIG_THINKPAD_ACPI_VIDEO */
4713
4714 /*************************************************************************
4715  * Light (thinklight) subdriver
4716  */
4717
4718 TPACPI_HANDLE(lght, root, "\\LGHT");    /* A21e, A2xm/p, T20-22, X20-21 */
4719 TPACPI_HANDLE(ledb, ec, "LEDB");                /* G4x */
4720
4721 static int light_get_status(void)
4722 {
4723         int status = 0;
4724
4725         if (tp_features.light_status) {
4726                 if (!acpi_evalf(ec_handle, &status, "KBLT", "d"))
4727                         return -EIO;
4728                 return (!!status);
4729         }
4730
4731         return -ENXIO;
4732 }
4733
4734 static int light_set_status(int status)
4735 {
4736         int rc;
4737
4738         if (tp_features.light) {
4739                 if (cmos_handle) {
4740                         rc = acpi_evalf(cmos_handle, NULL, NULL, "vd",
4741                                         (status)?
4742                                                 TP_CMOS_THINKLIGHT_ON :
4743                                                 TP_CMOS_THINKLIGHT_OFF);
4744                 } else {
4745                         rc = acpi_evalf(lght_handle, NULL, NULL, "vd",
4746                                         (status)? 1 : 0);
4747                 }
4748                 return (rc)? 0 : -EIO;
4749         }
4750
4751         return -ENXIO;
4752 }
4753
4754 static void light_set_status_worker(struct work_struct *work)
4755 {
4756         struct tpacpi_led_classdev *data =
4757                         container_of(work, struct tpacpi_led_classdev, work);
4758
4759         if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING))
4760                 light_set_status((data->new_state != TPACPI_LED_OFF));
4761 }
4762
4763 static void light_sysfs_set(struct led_classdev *led_cdev,
4764                         enum led_brightness brightness)
4765 {
4766         struct tpacpi_led_classdev *data =
4767                 container_of(led_cdev,
4768                              struct tpacpi_led_classdev,
4769                              led_classdev);
4770         data->new_state = (brightness != LED_OFF) ?
4771                                 TPACPI_LED_ON : TPACPI_LED_OFF;
4772         queue_work(tpacpi_wq, &data->work);
4773 }
4774
4775 static enum led_brightness light_sysfs_get(struct led_classdev *led_cdev)
4776 {
4777         return (light_get_status() == 1)? LED_FULL : LED_OFF;
4778 }
4779
4780 static struct tpacpi_led_classdev tpacpi_led_thinklight = {
4781         .led_classdev = {
4782                 .name           = "tpacpi::thinklight",
4783                 .brightness_set = &light_sysfs_set,
4784                 .brightness_get = &light_sysfs_get,
4785         }
4786 };
4787
4788 static int __init light_init(struct ibm_init_struct *iibm)
4789 {
4790         int rc;
4791
4792         vdbg_printk(TPACPI_DBG_INIT, "initializing light subdriver\n");
4793
4794         TPACPI_ACPIHANDLE_INIT(ledb);
4795         TPACPI_ACPIHANDLE_INIT(lght);
4796         TPACPI_ACPIHANDLE_INIT(cmos);
4797         INIT_WORK(&tpacpi_led_thinklight.work, light_set_status_worker);
4798
4799         /* light not supported on 570, 600e/x, 770e, 770x, G4x, R30, R31 */
4800         tp_features.light = (cmos_handle || lght_handle) && !ledb_handle;
4801
4802         if (tp_features.light)
4803                 /* light status not supported on
4804                    570, 600e/x, 770e, 770x, G4x, R30, R31, R32, X20 */
4805                 tp_features.light_status =
4806                         acpi_evalf(ec_handle, NULL, "KBLT", "qv");
4807
4808         vdbg_printk(TPACPI_DBG_INIT, "light is %s, light status is %s\n",
4809                 str_supported(tp_features.light),
4810                 str_supported(tp_features.light_status));
4811
4812         if (!tp_features.light)
4813                 return 1;
4814
4815         rc = led_classdev_register(&tpacpi_pdev->dev,
4816                                    &tpacpi_led_thinklight.led_classdev);
4817
4818         if (rc < 0) {
4819                 tp_features.light = 0;
4820                 tp_features.light_status = 0;
4821         } else  {
4822                 rc = 0;
4823         }
4824
4825         return rc;
4826 }
4827
4828 static void light_exit(void)
4829 {
4830         led_classdev_unregister(&tpacpi_led_thinklight.led_classdev);
4831         if (work_pending(&tpacpi_led_thinklight.work))
4832                 flush_workqueue(tpacpi_wq);
4833 }
4834
4835 static int light_read(struct seq_file *m)
4836 {
4837         int status;
4838
4839         if (!tp_features.light) {
4840                 seq_printf(m, "status:\t\tnot supported\n");
4841         } else if (!tp_features.light_status) {
4842                 seq_printf(m, "status:\t\tunknown\n");
4843                 seq_printf(m, "commands:\ton, off\n");
4844         } else {
4845                 status = light_get_status();
4846                 if (status < 0)
4847                         return status;
4848                 seq_printf(m, "status:\t\t%s\n", onoff(status, 0));
4849                 seq_printf(m, "commands:\ton, off\n");
4850         }
4851
4852         return 0;
4853 }
4854
4855 static int light_write(char *buf)
4856 {
4857         char *cmd;
4858         int newstatus = 0;
4859
4860         if (!tp_features.light)
4861                 return -ENODEV;
4862
4863         while ((cmd = next_cmd(&buf))) {
4864                 if (strlencmp(cmd, "on") == 0) {
4865                         newstatus = 1;
4866                 } else if (strlencmp(cmd, "off") == 0) {
4867                         newstatus = 0;
4868                 } else
4869                         return -EINVAL;
4870         }
4871
4872         return light_set_status(newstatus);
4873 }
4874
4875 static struct ibm_struct light_driver_data = {
4876         .name = "light",
4877         .read = light_read,
4878         .write = light_write,
4879         .exit = light_exit,
4880 };
4881
4882 /*************************************************************************
4883  * CMOS subdriver
4884  */
4885
4886 /* sysfs cmos_command -------------------------------------------------- */
4887 static ssize_t cmos_command_store(struct device *dev,
4888                             struct device_attribute *attr,
4889                             const char *buf, size_t count)
4890 {
4891         unsigned long cmos_cmd;
4892         int res;
4893
4894         if (parse_strtoul(buf, 21, &cmos_cmd))
4895                 return -EINVAL;
4896
4897         res = issue_thinkpad_cmos_command(cmos_cmd);
4898         return (res)? res : count;
4899 }
4900
4901 static struct device_attribute dev_attr_cmos_command =
4902         __ATTR(cmos_command, S_IWUSR, NULL, cmos_command_store);
4903
4904 /* --------------------------------------------------------------------- */
4905
4906 static int __init cmos_init(struct ibm_init_struct *iibm)
4907 {
4908         int res;
4909
4910         vdbg_printk(TPACPI_DBG_INIT,
4911                 "initializing cmos commands subdriver\n");
4912
4913         TPACPI_ACPIHANDLE_INIT(cmos);
4914
4915         vdbg_printk(TPACPI_DBG_INIT, "cmos commands are %s\n",
4916                 str_supported(cmos_handle != NULL));
4917
4918         res = device_create_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
4919         if (res)
4920                 return res;
4921
4922         return (cmos_handle)? 0 : 1;
4923 }
4924
4925 static void cmos_exit(void)
4926 {
4927         device_remove_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
4928 }
4929
4930 static int cmos_read(struct seq_file *m)
4931 {
4932         /* cmos not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
4933            R30, R31, T20-22, X20-21 */
4934         if (!cmos_handle)
4935                 seq_printf(m, "status:\t\tnot supported\n");
4936         else {
4937                 seq_printf(m, "status:\t\tsupported\n");
4938                 seq_printf(m, "commands:\t<cmd> (<cmd> is 0-21)\n");
4939         }
4940
4941         return 0;
4942 }
4943
4944 static int cmos_write(char *buf)
4945 {
4946         char *cmd;
4947         int cmos_cmd, res;
4948
4949         while ((cmd = next_cmd(&buf))) {
4950                 if (sscanf(cmd, "%u", &cmos_cmd) == 1 &&
4951                     cmos_cmd >= 0 && cmos_cmd <= 21) {
4952                         /* cmos_cmd set */
4953                 } else
4954                         return -EINVAL;
4955
4956                 res = issue_thinkpad_cmos_command(cmos_cmd);
4957                 if (res)
4958                         return res;
4959         }
4960
4961         return 0;
4962 }
4963
4964 static struct ibm_struct cmos_driver_data = {
4965         .name = "cmos",
4966         .read = cmos_read,
4967         .write = cmos_write,
4968         .exit = cmos_exit,
4969 };
4970
4971 /*************************************************************************
4972  * LED subdriver
4973  */
4974
4975 enum led_access_mode {
4976         TPACPI_LED_NONE = 0,
4977         TPACPI_LED_570, /* 570 */
4978         TPACPI_LED_OLD, /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
4979         TPACPI_LED_NEW, /* all others */
4980 };
4981
4982 enum {  /* For TPACPI_LED_OLD */
4983         TPACPI_LED_EC_HLCL = 0x0c,      /* EC reg to get led to power on */
4984         TPACPI_LED_EC_HLBL = 0x0d,      /* EC reg to blink a lit led */
4985         TPACPI_LED_EC_HLMS = 0x0e,      /* EC reg to select led to command */
4986 };
4987
4988 static enum led_access_mode led_supported;
4989
4990 TPACPI_HANDLE(led, ec, "SLED",  /* 570 */
4991            "SYSL",              /* 600e/x, 770e, 770x, A21e, A2xm/p, */
4992                                 /* T20-22, X20-21 */
4993            "LED",               /* all others */
4994            );                   /* R30, R31 */
4995
4996 #define TPACPI_LED_NUMLEDS 16
4997 static struct tpacpi_led_classdev *tpacpi_leds;
4998 static enum led_status_t tpacpi_led_state_cache[TPACPI_LED_NUMLEDS];
4999 static const char * const tpacpi_led_names[TPACPI_LED_NUMLEDS] = {
5000         /* there's a limit of 19 chars + NULL before 2.6.26 */
5001         "tpacpi::power",
5002         "tpacpi:orange:batt",
5003         "tpacpi:green:batt",
5004         "tpacpi::dock_active",
5005         "tpacpi::bay_active",
5006         "tpacpi::dock_batt",
5007         "tpacpi::unknown_led",
5008         "tpacpi::standby",
5009         "tpacpi::dock_status1",
5010         "tpacpi::dock_status2",
5011         "tpacpi::unknown_led2",
5012         "tpacpi::unknown_led3",
5013         "tpacpi::thinkvantage",
5014 };
5015 #define TPACPI_SAFE_LEDS        0x1081U
5016
5017 static inline bool tpacpi_is_led_restricted(const unsigned int led)
5018 {
5019 #ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS
5020         return false;
5021 #else
5022         return (1U & (TPACPI_SAFE_LEDS >> led)) == 0;
5023 #endif
5024 }
5025
5026 static int led_get_status(const unsigned int led)
5027 {
5028         int status;
5029         enum led_status_t led_s;
5030
5031         switch (led_supported) {
5032         case TPACPI_LED_570:
5033                 if (!acpi_evalf(ec_handle,
5034                                 &status, "GLED", "dd", 1 << led))
5035                         return -EIO;
5036                 led_s = (status == 0)?
5037                                 TPACPI_LED_OFF :
5038                                 ((status == 1)?
5039                                         TPACPI_LED_ON :
5040                                         TPACPI_LED_BLINK);
5041                 tpacpi_led_state_cache[led] = led_s;
5042                 return led_s;
5043         default:
5044                 return -ENXIO;
5045         }
5046
5047         /* not reached */
5048 }
5049
5050 static int led_set_status(const unsigned int led,
5051                           const enum led_status_t ledstatus)
5052 {
5053         /* off, on, blink. Index is led_status_t */
5054         static const unsigned int led_sled_arg1[] = { 0, 1, 3 };
5055         static const unsigned int led_led_arg1[] = { 0, 0x80, 0xc0 };
5056
5057         int rc = 0;
5058
5059         switch (led_supported) {
5060         case TPACPI_LED_570:
5061                 /* 570 */
5062                 if (unlikely(led > 7))
5063                         return -EINVAL;
5064                 if (unlikely(tpacpi_is_led_restricted(led)))
5065                         return -EPERM;
5066                 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
5067                                 (1 << led), led_sled_arg1[ledstatus]))
5068                         rc = -EIO;
5069                 break;
5070         case TPACPI_LED_OLD:
5071                 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */
5072                 if (unlikely(led > 7))
5073                         return -EINVAL;
5074                 if (unlikely(tpacpi_is_led_restricted(led)))
5075                         return -EPERM;
5076                 rc = ec_write(TPACPI_LED_EC_HLMS, (1 << led));
5077                 if (rc >= 0)
5078                         rc = ec_write(TPACPI_LED_EC_HLBL,
5079                                       (ledstatus == TPACPI_LED_BLINK) << led);
5080                 if (rc >= 0)
5081                         rc = ec_write(TPACPI_LED_EC_HLCL,
5082                                       (ledstatus != TPACPI_LED_OFF) << led);
5083                 break;
5084         case TPACPI_LED_NEW:
5085                 /* all others */
5086                 if (unlikely(led >= TPACPI_LED_NUMLEDS))
5087                         return -EINVAL;
5088                 if (unlikely(tpacpi_is_led_restricted(led)))
5089                         return -EPERM;
5090                 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
5091                                 led, led_led_arg1[ledstatus]))
5092                         rc = -EIO;
5093                 break;
5094         default:
5095                 rc = -ENXIO;
5096         }
5097
5098         if (!rc)
5099                 tpacpi_led_state_cache[led] = ledstatus;
5100
5101         return rc;
5102 }
5103
5104 static void led_set_status_worker(struct work_struct *work)
5105 {
5106         struct tpacpi_led_classdev *data =
5107                 container_of(work, struct tpacpi_led_classdev, work);
5108
5109         if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING))
5110                 led_set_status(data->led, data->new_state);
5111 }
5112
5113 static void led_sysfs_set(struct led_classdev *led_cdev,
5114                         enum led_brightness brightness)
5115 {
5116         struct tpacpi_led_classdev *data = container_of(led_cdev,
5117                              struct tpacpi_led_classdev, led_classdev);
5118
5119         if (brightness == LED_OFF)
5120                 data->new_state = TPACPI_LED_OFF;
5121         else if (tpacpi_led_state_cache[data->led] != TPACPI_LED_BLINK)
5122                 data->new_state = TPACPI_LED_ON;
5123         else
5124                 data->new_state = TPACPI_LED_BLINK;
5125
5126         queue_work(tpacpi_wq, &data->work);
5127 }
5128
5129 static int led_sysfs_blink_set(struct led_classdev *led_cdev,
5130                         unsigned long *delay_on, unsigned long *delay_off)
5131 {
5132         struct tpacpi_led_classdev *data = container_of(led_cdev,
5133                              struct tpacpi_led_classdev, led_classdev);
5134
5135         /* Can we choose the flash rate? */
5136         if (*delay_on == 0 && *delay_off == 0) {
5137                 /* yes. set them to the hardware blink rate (1 Hz) */
5138                 *delay_on = 500; /* ms */
5139                 *delay_off = 500; /* ms */
5140         } else if ((*delay_on != 500) || (*delay_off != 500))
5141                 return -EINVAL;
5142
5143         data->new_state = TPACPI_LED_BLINK;
5144         queue_work(tpacpi_wq, &data->work);
5145
5146         return 0;
5147 }
5148
5149 static enum led_brightness led_sysfs_get(struct led_classdev *led_cdev)
5150 {
5151         int rc;
5152
5153         struct tpacpi_led_classdev *data = container_of(led_cdev,
5154                              struct tpacpi_led_classdev, led_classdev);
5155
5156         rc = led_get_status(data->led);
5157
5158         if (rc == TPACPI_LED_OFF || rc < 0)
5159                 rc = LED_OFF;   /* no error handling in led class :( */
5160         else
5161                 rc = LED_FULL;
5162
5163         return rc;
5164 }
5165
5166 static void led_exit(void)
5167 {
5168         unsigned int i;
5169
5170         for (i = 0; i < TPACPI_LED_NUMLEDS; i++) {
5171                 if (tpacpi_leds[i].led_classdev.name)
5172                         led_classdev_unregister(&tpacpi_leds[i].led_classdev);
5173         }
5174
5175         kfree(tpacpi_leds);
5176 }
5177
5178 static int __init tpacpi_init_led(unsigned int led)
5179 {
5180         int rc;
5181
5182         tpacpi_leds[led].led = led;
5183
5184         /* LEDs with no name don't get registered */
5185         if (!tpacpi_led_names[led])
5186                 return 0;
5187
5188         tpacpi_leds[led].led_classdev.brightness_set = &led_sysfs_set;
5189         tpacpi_leds[led].led_classdev.blink_set = &led_sysfs_blink_set;
5190         if (led_supported == TPACPI_LED_570)
5191                 tpacpi_leds[led].led_classdev.brightness_get =
5192                                                 &led_sysfs_get;
5193
5194         tpacpi_leds[led].led_classdev.name = tpacpi_led_names[led];
5195
5196         INIT_WORK(&tpacpi_leds[led].work, led_set_status_worker);
5197
5198         rc = led_classdev_register(&tpacpi_pdev->dev,
5199                                 &tpacpi_leds[led].led_classdev);
5200         if (rc < 0)
5201                 tpacpi_leds[led].led_classdev.name = NULL;
5202
5203         return rc;
5204 }
5205
5206 static const struct tpacpi_quirk led_useful_qtable[] __initconst = {
5207         TPACPI_Q_IBM('1', 'E', 0x009f), /* A30 */
5208         TPACPI_Q_IBM('1', 'N', 0x009f), /* A31 */
5209         TPACPI_Q_IBM('1', 'G', 0x009f), /* A31 */
5210
5211         TPACPI_Q_IBM('1', 'I', 0x0097), /* T30 */
5212         TPACPI_Q_IBM('1', 'R', 0x0097), /* T40, T41, T42, R50, R51 */
5213         TPACPI_Q_IBM('7', '0', 0x0097), /* T43, R52 */
5214         TPACPI_Q_IBM('1', 'Y', 0x0097), /* T43 */
5215         TPACPI_Q_IBM('1', 'W', 0x0097), /* R50e */
5216         TPACPI_Q_IBM('1', 'V', 0x0097), /* R51 */
5217         TPACPI_Q_IBM('7', '8', 0x0097), /* R51e */
5218         TPACPI_Q_IBM('7', '6', 0x0097), /* R52 */
5219
5220         TPACPI_Q_IBM('1', 'K', 0x00bf), /* X30 */
5221         TPACPI_Q_IBM('1', 'Q', 0x00bf), /* X31, X32 */
5222         TPACPI_Q_IBM('1', 'U', 0x00bf), /* X40 */
5223         TPACPI_Q_IBM('7', '4', 0x00bf), /* X41 */
5224         TPACPI_Q_IBM('7', '5', 0x00bf), /* X41t */
5225
5226         TPACPI_Q_IBM('7', '9', 0x1f97), /* T60 (1) */
5227         TPACPI_Q_IBM('7', '7', 0x1f97), /* Z60* (1) */
5228         TPACPI_Q_IBM('7', 'F', 0x1f97), /* Z61* (1) */
5229         TPACPI_Q_IBM('7', 'B', 0x1fb7), /* X60 (1) */
5230
5231         /* (1) - may have excess leds enabled on MSB */
5232
5233         /* Defaults (order matters, keep last, don't reorder!) */
5234         { /* Lenovo */
5235           .vendor = PCI_VENDOR_ID_LENOVO,
5236           .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY,
5237           .quirks = 0x1fffU,
5238         },
5239         { /* IBM ThinkPads with no EC version string */
5240           .vendor = PCI_VENDOR_ID_IBM,
5241           .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_UNKNOWN,
5242           .quirks = 0x00ffU,
5243         },
5244         { /* IBM ThinkPads with EC version string */
5245           .vendor = PCI_VENDOR_ID_IBM,
5246           .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY,
5247           .quirks = 0x00bfU,
5248         },
5249 };
5250
5251 #undef TPACPI_LEDQ_IBM
5252 #undef TPACPI_LEDQ_LNV
5253
5254 static int __init led_init(struct ibm_init_struct *iibm)
5255 {
5256         unsigned int i;
5257         int rc;
5258         unsigned long useful_leds;
5259
5260         vdbg_printk(TPACPI_DBG_INIT, "initializing LED subdriver\n");
5261
5262         TPACPI_ACPIHANDLE_INIT(led);
5263
5264         if (!led_handle)
5265                 /* led not supported on R30, R31 */
5266                 led_supported = TPACPI_LED_NONE;
5267         else if (strlencmp(led_path, "SLED") == 0)
5268                 /* 570 */
5269                 led_supported = TPACPI_LED_570;
5270         else if (strlencmp(led_path, "SYSL") == 0)
5271                 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
5272                 led_supported = TPACPI_LED_OLD;
5273         else
5274                 /* all others */
5275                 led_supported = TPACPI_LED_NEW;
5276
5277         vdbg_printk(TPACPI_DBG_INIT, "LED commands are %s, mode %d\n",
5278                 str_supported(led_supported), led_supported);
5279
5280         if (led_supported == TPACPI_LED_NONE)
5281                 return 1;
5282
5283         tpacpi_leds = kzalloc(sizeof(*tpacpi_leds) * TPACPI_LED_NUMLEDS,
5284                               GFP_KERNEL);
5285         if (!tpacpi_leds) {
5286                 printk(TPACPI_ERR "Out of memory for LED data\n");
5287                 return -ENOMEM;
5288         }
5289
5290         useful_leds = tpacpi_check_quirks(led_useful_qtable,
5291                                           ARRAY_SIZE(led_useful_qtable));
5292
5293         for (i = 0; i < TPACPI_LED_NUMLEDS; i++) {
5294                 if (!tpacpi_is_led_restricted(i) &&
5295                     test_bit(i, &useful_leds)) {
5296                         rc = tpacpi_init_led(i);
5297                         if (rc < 0) {
5298                                 led_exit();
5299                                 return rc;
5300                         }
5301                 }
5302         }
5303
5304 #ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS
5305         printk(TPACPI_NOTICE
5306                 "warning: userspace override of important "
5307                 "firmware LEDs is enabled\n");
5308 #endif
5309         return 0;
5310 }
5311
5312 #define str_led_status(s) \
5313         ((s) == TPACPI_LED_OFF ? "off" : \
5314                 ((s) == TPACPI_LED_ON ? "on" : "blinking"))
5315
5316 static int led_read(struct seq_file *m)
5317 {
5318         if (!led_supported) {
5319                 seq_printf(m, "status:\t\tnot supported\n");
5320                 return 0;
5321         }
5322         seq_printf(m, "status:\t\tsupported\n");
5323
5324         if (led_supported == TPACPI_LED_570) {
5325                 /* 570 */
5326                 int i, status;
5327                 for (i = 0; i < 8; i++) {
5328                         status = led_get_status(i);
5329                         if (status < 0)
5330                                 return -EIO;
5331                         seq_printf(m, "%d:\t\t%s\n",
5332                                        i, str_led_status(status));
5333                 }
5334         }
5335
5336         seq_printf(m, "commands:\t"
5337                        "<led> on, <led> off, <led> blink (<led> is 0-15)\n");
5338
5339         return 0;
5340 }
5341
5342 static int led_write(char *buf)
5343 {
5344         char *cmd;
5345         int led, rc;
5346         enum led_status_t s;
5347
5348         if (!led_supported)
5349                 return -ENODEV;
5350
5351         while ((cmd = next_cmd(&buf))) {
5352                 if (sscanf(cmd, "%d", &led) != 1 || led < 0 || led > 15)
5353                         return -EINVAL;
5354
5355                 if (strstr(cmd, "off")) {
5356                         s = TPACPI_LED_OFF;
5357                 } else if (strstr(cmd, "on")) {
5358                         s = TPACPI_LED_ON;
5359                 } else if (strstr(cmd, "blink")) {
5360                         s = TPACPI_LED_BLINK;
5361                 } else {
5362                         return -EINVAL;
5363                 }
5364
5365                 rc = led_set_status(led, s);
5366                 if (rc < 0)
5367                         return rc;
5368         }
5369
5370         return 0;
5371 }
5372
5373 static struct ibm_struct led_driver_data = {
5374         .name = "led",
5375         .read = led_read,
5376         .write = led_write,
5377         .exit = led_exit,
5378 };
5379
5380 /*************************************************************************
5381  * Beep subdriver
5382  */
5383
5384 TPACPI_HANDLE(beep, ec, "BEEP");        /* all except R30, R31 */
5385
5386 #define TPACPI_BEEP_Q1 0x0001
5387
5388 static const struct tpacpi_quirk beep_quirk_table[] __initconst = {
5389         TPACPI_Q_IBM('I', 'M', TPACPI_BEEP_Q1), /* 570 */
5390         TPACPI_Q_IBM('I', 'U', TPACPI_BEEP_Q1), /* 570E - unverified */
5391 };
5392
5393 static int __init beep_init(struct ibm_init_struct *iibm)
5394 {
5395         unsigned long quirks;
5396
5397         vdbg_printk(TPACPI_DBG_INIT, "initializing beep subdriver\n");
5398
5399         TPACPI_ACPIHANDLE_INIT(beep);
5400
5401         vdbg_printk(TPACPI_DBG_INIT, "beep is %s\n",
5402                 str_supported(beep_handle != NULL));
5403
5404         quirks = tpacpi_check_quirks(beep_quirk_table,
5405                                      ARRAY_SIZE(beep_quirk_table));
5406
5407         tp_features.beep_needs_two_args = !!(quirks & TPACPI_BEEP_Q1);
5408
5409         return (beep_handle)? 0 : 1;
5410 }
5411
5412 static int beep_read(struct seq_file *m)
5413 {
5414         if (!beep_handle)
5415                 seq_printf(m, "status:\t\tnot supported\n");
5416         else {
5417                 seq_printf(m, "status:\t\tsupported\n");
5418                 seq_printf(m, "commands:\t<cmd> (<cmd> is 0-17)\n");
5419         }
5420
5421         return 0;
5422 }
5423
5424 static int beep_write(char *buf)
5425 {
5426         char *cmd;
5427         int beep_cmd;
5428
5429         if (!beep_handle)
5430                 return -ENODEV;
5431
5432         while ((cmd = next_cmd(&buf))) {
5433                 if (sscanf(cmd, "%u", &beep_cmd) == 1 &&
5434                     beep_cmd >= 0 && beep_cmd <= 17) {
5435                         /* beep_cmd set */
5436                 } else
5437                         return -EINVAL;
5438                 if (tp_features.beep_needs_two_args) {
5439                         if (!acpi_evalf(beep_handle, NULL, NULL, "vdd",
5440                                         beep_cmd, 0))
5441                                 return -EIO;
5442                 } else {
5443                         if (!acpi_evalf(beep_handle, NULL, NULL, "vd",
5444                                         beep_cmd))
5445                                 return -EIO;
5446                 }
5447         }
5448
5449         return 0;
5450 }
5451
5452 static struct ibm_struct beep_driver_data = {
5453         .name = "beep",
5454         .read = beep_read,
5455         .write = beep_write,
5456 };
5457
5458 /*************************************************************************
5459  * Thermal subdriver
5460  */
5461
5462 enum thermal_access_mode {
5463         TPACPI_THERMAL_NONE = 0,        /* No thermal support */
5464         TPACPI_THERMAL_ACPI_TMP07,      /* Use ACPI TMP0-7 */
5465         TPACPI_THERMAL_ACPI_UPDT,       /* Use ACPI TMP0-7 with UPDT */
5466         TPACPI_THERMAL_TPEC_8,          /* Use ACPI EC regs, 8 sensors */
5467         TPACPI_THERMAL_TPEC_16,         /* Use ACPI EC regs, 16 sensors */
5468 };
5469
5470 enum { /* TPACPI_THERMAL_TPEC_* */
5471         TP_EC_THERMAL_TMP0 = 0x78,      /* ACPI EC regs TMP 0..7 */
5472         TP_EC_THERMAL_TMP8 = 0xC0,      /* ACPI EC regs TMP 8..15 */
5473         TP_EC_THERMAL_TMP_NA = -128,    /* ACPI EC sensor not available */
5474
5475         TPACPI_THERMAL_SENSOR_NA = -128000, /* Sensor not available */
5476 };
5477
5478
5479 #define TPACPI_MAX_THERMAL_SENSORS 16   /* Max thermal sensors supported */
5480 struct ibm_thermal_sensors_struct {
5481         s32 temp[TPACPI_MAX_THERMAL_SENSORS];
5482 };
5483
5484 static enum thermal_access_mode thermal_read_mode;
5485
5486 /* idx is zero-based */
5487 static int thermal_get_sensor(int idx, s32 *value)
5488 {
5489         int t;
5490         s8 tmp;
5491         char tmpi[5];
5492
5493         t = TP_EC_THERMAL_TMP0;
5494
5495         switch (thermal_read_mode) {
5496 #if TPACPI_MAX_THERMAL_SENSORS >= 16
5497         case TPACPI_THERMAL_TPEC_16:
5498                 if (idx >= 8 && idx <= 15) {
5499                         t = TP_EC_THERMAL_TMP8;
5500                         idx -= 8;
5501                 }
5502                 /* fallthrough */
5503 #endif
5504         case TPACPI_THERMAL_TPEC_8:
5505                 if (idx <= 7) {
5506                         if (!acpi_ec_read(t + idx, &tmp))
5507                                 return -EIO;
5508                         *value = tmp * 1000;
5509                         return 0;
5510                 }
5511                 break;
5512
5513         case TPACPI_THERMAL_ACPI_UPDT:
5514                 if (idx <= 7) {
5515                         snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
5516                         if (!acpi_evalf(ec_handle, NULL, "UPDT", "v"))
5517                                 return -EIO;
5518                         if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
5519                                 return -EIO;
5520                         *value = (t - 2732) * 100;
5521                         return 0;
5522                 }
5523                 break;
5524
5525         case TPACPI_THERMAL_ACPI_TMP07:
5526                 if (idx <= 7) {
5527                         snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
5528                         if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
5529                                 return -EIO;
5530                         if (t > 127 || t < -127)
5531                                 t = TP_EC_THERMAL_TMP_NA;
5532                         *value = t * 1000;
5533                         return 0;
5534                 }
5535                 break;
5536
5537         case TPACPI_THERMAL_NONE:
5538         default:
5539                 return -ENOSYS;
5540         }
5541
5542         return -EINVAL;
5543 }
5544
5545 static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s)
5546 {
5547         int res, i;
5548         int n;
5549
5550         n = 8;
5551         i = 0;
5552
5553         if (!s)
5554                 return -EINVAL;
5555
5556         if (thermal_read_mode == TPACPI_THERMAL_TPEC_16)
5557                 n = 16;
5558
5559         for (i = 0 ; i < n; i++) {
5560                 res = thermal_get_sensor(i, &s->temp[i]);
5561                 if (res)
5562                         return res;
5563         }
5564
5565         return n;
5566 }
5567
5568 static void thermal_dump_all_sensors(void)
5569 {
5570         int n, i;
5571         struct ibm_thermal_sensors_struct t;
5572
5573         n = thermal_get_sensors(&t);
5574         if (n <= 0)
5575                 return;
5576
5577         printk(TPACPI_NOTICE
5578                 "temperatures (Celsius):");
5579
5580         for (i = 0; i < n; i++) {
5581                 if (t.temp[i] != TPACPI_THERMAL_SENSOR_NA)
5582                         printk(KERN_CONT " %d", (int)(t.temp[i] / 1000));
5583                 else
5584                         printk(KERN_CONT " N/A");
5585         }
5586
5587         printk(KERN_CONT "\n");
5588 }
5589
5590 /* sysfs temp##_input -------------------------------------------------- */
5591
5592 static ssize_t thermal_temp_input_show(struct device *dev,
5593                            struct device_attribute *attr,
5594                            char *buf)
5595 {
5596         struct sensor_device_attribute *sensor_attr =
5597                                         to_sensor_dev_attr(attr);
5598         int idx = sensor_attr->index;
5599         s32 value;
5600         int res;
5601
5602         res = thermal_get_sensor(idx, &value);
5603         if (res)
5604                 return res;
5605         if (value == TPACPI_THERMAL_SENSOR_NA)
5606                 return -ENXIO;
5607
5608         return snprintf(buf, PAGE_SIZE, "%d\n", value);
5609 }
5610
5611 #define THERMAL_SENSOR_ATTR_TEMP(_idxA, _idxB) \
5612          SENSOR_ATTR(temp##_idxA##_input, S_IRUGO, \
5613                      thermal_temp_input_show, NULL, _idxB)
5614
5615 static struct sensor_device_attribute sensor_dev_attr_thermal_temp_input[] = {
5616         THERMAL_SENSOR_ATTR_TEMP(1, 0),
5617         THERMAL_SENSOR_ATTR_TEMP(2, 1),
5618         THERMAL_SENSOR_ATTR_TEMP(3, 2),
5619         THERMAL_SENSOR_ATTR_TEMP(4, 3),
5620         THERMAL_SENSOR_ATTR_TEMP(5, 4),
5621         THERMAL_SENSOR_ATTR_TEMP(6, 5),
5622         THERMAL_SENSOR_ATTR_TEMP(7, 6),
5623         THERMAL_SENSOR_ATTR_TEMP(8, 7),
5624         THERMAL_SENSOR_ATTR_TEMP(9, 8),
5625         THERMAL_SENSOR_ATTR_TEMP(10, 9),
5626         THERMAL_SENSOR_ATTR_TEMP(11, 10),
5627         THERMAL_SENSOR_ATTR_TEMP(12, 11),
5628         THERMAL_SENSOR_ATTR_TEMP(13, 12),
5629         THERMAL_SENSOR_ATTR_TEMP(14, 13),
5630         THERMAL_SENSOR_ATTR_TEMP(15, 14),
5631         THERMAL_SENSOR_ATTR_TEMP(16, 15),
5632 };
5633
5634 #define THERMAL_ATTRS(X) \
5635         &sensor_dev_attr_thermal_temp_input[X].dev_attr.attr
5636
5637 static struct attribute *thermal_temp_input_attr[] = {
5638         THERMAL_ATTRS(8),
5639         THERMAL_ATTRS(9),
5640         THERMAL_ATTRS(10),
5641         THERMAL_ATTRS(11),
5642         THERMAL_ATTRS(12),
5643         THERMAL_ATTRS(13),
5644         THERMAL_ATTRS(14),
5645         THERMAL_ATTRS(15),
5646         THERMAL_ATTRS(0),
5647         THERMAL_ATTRS(1),
5648         THERMAL_ATTRS(2),
5649         THERMAL_ATTRS(3),
5650         THERMAL_ATTRS(4),
5651         THERMAL_ATTRS(5),
5652         THERMAL_ATTRS(6),
5653         THERMAL_ATTRS(7),
5654         NULL
5655 };
5656
5657 static const struct attribute_group thermal_temp_input16_group = {
5658         .attrs = thermal_temp_input_attr
5659 };
5660
5661 static const struct attribute_group thermal_temp_input8_group = {
5662         .attrs = &thermal_temp_input_attr[8]
5663 };
5664
5665 #undef THERMAL_SENSOR_ATTR_TEMP
5666 #undef THERMAL_ATTRS
5667
5668 /* --------------------------------------------------------------------- */
5669
5670 static int __init thermal_init(struct ibm_init_struct *iibm)
5671 {
5672         u8 t, ta1, ta2;
5673         int i;
5674         int acpi_tmp7;
5675         int res;
5676
5677         vdbg_printk(TPACPI_DBG_INIT, "initializing thermal subdriver\n");
5678
5679         acpi_tmp7 = acpi_evalf(ec_handle, NULL, "TMP7", "qv");
5680
5681         if (thinkpad_id.ec_model) {
5682                 /*
5683                  * Direct EC access mode: sensors at registers
5684                  * 0x78-0x7F, 0xC0-0xC7.  Registers return 0x00 for
5685                  * non-implemented, thermal sensors return 0x80 when
5686                  * not available
5687                  */
5688
5689                 ta1 = ta2 = 0;
5690                 for (i = 0; i < 8; i++) {
5691                         if (acpi_ec_read(TP_EC_THERMAL_TMP0 + i, &t)) {
5692                                 ta1 |= t;
5693                         } else {
5694                                 ta1 = 0;
5695                                 break;
5696                         }
5697                         if (acpi_ec_read(TP_EC_THERMAL_TMP8 + i, &t)) {
5698                                 ta2 |= t;
5699                         } else {
5700                                 ta1 = 0;
5701                                 break;
5702                         }
5703                 }
5704                 if (ta1 == 0) {
5705                         /* This is sheer paranoia, but we handle it anyway */
5706                         if (acpi_tmp7) {
5707                                 printk(TPACPI_ERR
5708                                        "ThinkPad ACPI EC access misbehaving, "
5709                                        "falling back to ACPI TMPx access "
5710                                        "mode\n");
5711                                 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
5712                         } else {
5713                                 printk(TPACPI_ERR
5714                                        "ThinkPad ACPI EC access misbehaving, "
5715                                        "disabling thermal sensors access\n");
5716                                 thermal_read_mode = TPACPI_THERMAL_NONE;
5717                         }
5718                 } else {
5719                         thermal_read_mode =
5720                             (ta2 != 0) ?
5721                             TPACPI_THERMAL_TPEC_16 : TPACPI_THERMAL_TPEC_8;
5722                 }
5723         } else if (acpi_tmp7) {
5724                 if (acpi_evalf(ec_handle, NULL, "UPDT", "qv")) {
5725                         /* 600e/x, 770e, 770x */
5726                         thermal_read_mode = TPACPI_THERMAL_ACPI_UPDT;
5727                 } else {
5728                         /* Standard ACPI TMPx access, max 8 sensors */
5729                         thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
5730                 }
5731         } else {
5732                 /* temperatures not supported on 570, G4x, R30, R31, R32 */
5733                 thermal_read_mode = TPACPI_THERMAL_NONE;
5734         }
5735
5736         vdbg_printk(TPACPI_DBG_INIT, "thermal is %s, mode %d\n",
5737                 str_supported(thermal_read_mode != TPACPI_THERMAL_NONE),
5738                 thermal_read_mode);
5739
5740         switch (thermal_read_mode) {
5741         case TPACPI_THERMAL_TPEC_16:
5742                 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
5743                                 &thermal_temp_input16_group);
5744                 if (res)
5745                         return res;
5746                 break;
5747         case TPACPI_THERMAL_TPEC_8:
5748         case TPACPI_THERMAL_ACPI_TMP07:
5749         case TPACPI_THERMAL_ACPI_UPDT:
5750                 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
5751                                 &thermal_temp_input8_group);
5752                 if (res)
5753                         return res;
5754                 break;
5755         case TPACPI_THERMAL_NONE:
5756         default:
5757                 return 1;
5758         }
5759
5760         return 0;
5761 }
5762
5763 static void thermal_exit(void)
5764 {
5765         switch (thermal_read_mode) {
5766         case TPACPI_THERMAL_TPEC_16:
5767                 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
5768                                    &thermal_temp_input16_group);
5769                 break;
5770         case TPACPI_THERMAL_TPEC_8:
5771         case TPACPI_THERMAL_ACPI_TMP07:
5772         case TPACPI_THERMAL_ACPI_UPDT:
5773                 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
5774                                    &thermal_temp_input8_group);
5775                 break;
5776         case TPACPI_THERMAL_NONE:
5777         default:
5778                 break;
5779         }
5780 }
5781
5782 static int thermal_read(struct seq_file *m)
5783 {
5784         int n, i;
5785         struct ibm_thermal_sensors_struct t;
5786
5787         n = thermal_get_sensors(&t);
5788         if (unlikely(n < 0))
5789                 return n;
5790
5791         seq_printf(m, "temperatures:\t");
5792
5793         if (n > 0) {
5794                 for (i = 0; i < (n - 1); i++)
5795                         seq_printf(m, "%d ", t.temp[i] / 1000);
5796                 seq_printf(m, "%d\n", t.temp[i] / 1000);
5797         } else
5798                 seq_printf(m, "not supported\n");
5799
5800         return 0;
5801 }
5802
5803 static struct ibm_struct thermal_driver_data = {
5804         .name = "thermal",
5805         .read = thermal_read,
5806         .exit = thermal_exit,
5807 };
5808
5809 /*************************************************************************
5810  * EC Dump subdriver
5811  */
5812
5813 static u8 ecdump_regs[256];
5814
5815 static int ecdump_read(struct seq_file *m)
5816 {
5817         int i, j;
5818         u8 v;
5819
5820         seq_printf(m, "EC      "
5821                        " +00 +01 +02 +03 +04 +05 +06 +07"
5822                        " +08 +09 +0a +0b +0c +0d +0e +0f\n");
5823         for (i = 0; i < 256; i += 16) {
5824                 seq_printf(m, "EC 0x%02x:", i);
5825                 for (j = 0; j < 16; j++) {
5826                         if (!acpi_ec_read(i + j, &v))
5827                                 break;
5828                         if (v != ecdump_regs[i + j])
5829                                 seq_printf(m, " *%02x", v);
5830                         else
5831                                 seq_printf(m, "  %02x", v);
5832                         ecdump_regs[i + j] = v;
5833                 }
5834                 seq_putc(m, '\n');
5835                 if (j != 16)
5836                         break;
5837         }
5838
5839         /* These are way too dangerous to advertise openly... */
5840 #if 0
5841         seq_printf(m, "commands:\t0x<offset> 0x<value>"
5842                        " (<offset> is 00-ff, <value> is 00-ff)\n");
5843         seq_printf(m, "commands:\t0x<offset> <value>  "
5844                        " (<offset> is 00-ff, <value> is 0-255)\n");
5845 #endif
5846         return 0;
5847 }
5848
5849 static int ecdump_write(char *buf)
5850 {
5851         char *cmd;
5852         int i, v;
5853
5854         while ((cmd = next_cmd(&buf))) {
5855                 if (sscanf(cmd, "0x%x 0x%x", &i, &v) == 2) {
5856                         /* i and v set */
5857                 } else if (sscanf(cmd, "0x%x %u", &i, &v) == 2) {
5858                         /* i and v set */
5859                 } else
5860                         return -EINVAL;
5861                 if (i >= 0 && i < 256 && v >= 0 && v < 256) {
5862                         if (!acpi_ec_write(i, v))
5863                                 return -EIO;
5864                 } else
5865                         return -EINVAL;
5866         }
5867
5868         return 0;
5869 }
5870
5871 static struct ibm_struct ecdump_driver_data = {
5872         .name = "ecdump",
5873         .read = ecdump_read,
5874         .write = ecdump_write,
5875         .flags.experimental = 1,
5876 };
5877
5878 /*************************************************************************
5879  * Backlight/brightness subdriver
5880  */
5881
5882 #define TPACPI_BACKLIGHT_DEV_NAME "thinkpad_screen"
5883
5884 /*
5885  * ThinkPads can read brightness from two places: EC HBRV (0x31), or
5886  * CMOS NVRAM byte 0x5E, bits 0-3.
5887  *
5888  * EC HBRV (0x31) has the following layout
5889  *   Bit 7: unknown function
5890  *   Bit 6: unknown function
5891  *   Bit 5: Z: honour scale changes, NZ: ignore scale changes
5892  *   Bit 4: must be set to zero to avoid problems
5893  *   Bit 3-0: backlight brightness level
5894  *
5895  * brightness_get_raw returns status data in the HBRV layout
5896  *
5897  * WARNING: The X61 has been verified to use HBRV for something else, so
5898  * this should be used _only_ on IBM ThinkPads, and maybe with some careful
5899  * testing on the very early *60 Lenovo models...
5900  */
5901
5902 enum {
5903         TP_EC_BACKLIGHT = 0x31,
5904
5905         /* TP_EC_BACKLIGHT bitmasks */
5906         TP_EC_BACKLIGHT_LVLMSK = 0x1F,
5907         TP_EC_BACKLIGHT_CMDMSK = 0xE0,
5908         TP_EC_BACKLIGHT_MAPSW = 0x20,
5909 };
5910
5911 enum tpacpi_brightness_access_mode {
5912         TPACPI_BRGHT_MODE_AUTO = 0,     /* Not implemented yet */
5913         TPACPI_BRGHT_MODE_EC,           /* EC control */
5914         TPACPI_BRGHT_MODE_UCMS_STEP,    /* UCMS step-based control */
5915         TPACPI_BRGHT_MODE_ECNVRAM,      /* EC control w/ NVRAM store */
5916         TPACPI_BRGHT_MODE_MAX
5917 };
5918
5919 static struct backlight_device *ibm_backlight_device;
5920
5921 static enum tpacpi_brightness_access_mode brightness_mode =
5922                 TPACPI_BRGHT_MODE_MAX;
5923
5924 static unsigned int brightness_enable = 2; /* 2 = auto, 0 = no, 1 = yes */
5925
5926 static struct mutex brightness_mutex;
5927
5928 /* NVRAM brightness access,
5929  * call with brightness_mutex held! */
5930 static unsigned int tpacpi_brightness_nvram_get(void)
5931 {
5932         u8 lnvram;
5933
5934         lnvram = (nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS)
5935                   & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
5936                   >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
5937         lnvram &= (tp_features.bright_16levels) ? 0x0f : 0x07;
5938
5939         return lnvram;
5940 }
5941
5942 static void tpacpi_brightness_checkpoint_nvram(void)
5943 {
5944         u8 lec = 0;
5945         u8 b_nvram;
5946
5947         if (brightness_mode != TPACPI_BRGHT_MODE_ECNVRAM)
5948                 return;
5949
5950         vdbg_printk(TPACPI_DBG_BRGHT,
5951                 "trying to checkpoint backlight level to NVRAM...\n");
5952
5953         if (mutex_lock_killable(&brightness_mutex) < 0)
5954                 return;
5955
5956         if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
5957                 goto unlock;
5958         lec &= TP_EC_BACKLIGHT_LVLMSK;
5959         b_nvram = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS);
5960
5961         if (lec != ((b_nvram & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
5962                              >> TP_NVRAM_POS_LEVEL_BRIGHTNESS)) {
5963                 /* NVRAM needs update */
5964                 b_nvram &= ~(TP_NVRAM_MASK_LEVEL_BRIGHTNESS <<
5965                                 TP_NVRAM_POS_LEVEL_BRIGHTNESS);
5966                 b_nvram |= lec;
5967                 nvram_write_byte(b_nvram, TP_NVRAM_ADDR_BRIGHTNESS);
5968                 dbg_printk(TPACPI_DBG_BRGHT,
5969                            "updated NVRAM backlight level to %u (0x%02x)\n",
5970                            (unsigned int) lec, (unsigned int) b_nvram);
5971         } else
5972                 vdbg_printk(TPACPI_DBG_BRGHT,
5973                            "NVRAM backlight level already is %u (0x%02x)\n",
5974                            (unsigned int) lec, (unsigned int) b_nvram);
5975
5976 unlock:
5977         mutex_unlock(&brightness_mutex);
5978 }
5979
5980
5981 /* call with brightness_mutex held! */
5982 static int tpacpi_brightness_get_raw(int *status)
5983 {
5984         u8 lec = 0;
5985
5986         switch (brightness_mode) {
5987         case TPACPI_BRGHT_MODE_UCMS_STEP:
5988                 *status = tpacpi_brightness_nvram_get();
5989                 return 0;
5990         case TPACPI_BRGHT_MODE_EC:
5991         case TPACPI_BRGHT_MODE_ECNVRAM:
5992                 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
5993                         return -EIO;
5994                 *status = lec;
5995                 return 0;
5996         default:
5997                 return -ENXIO;
5998         }
5999 }
6000
6001 /* call with brightness_mutex held! */
6002 /* do NOT call with illegal backlight level value */
6003 static int tpacpi_brightness_set_ec(unsigned int value)
6004 {
6005         u8 lec = 0;
6006
6007         if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
6008                 return -EIO;
6009
6010         if (unlikely(!acpi_ec_write(TP_EC_BACKLIGHT,
6011                                 (lec & TP_EC_BACKLIGHT_CMDMSK) |
6012                                 (value & TP_EC_BACKLIGHT_LVLMSK))))
6013                 return -EIO;
6014
6015         return 0;
6016 }
6017
6018 /* call with brightness_mutex held! */
6019 static int tpacpi_brightness_set_ucmsstep(unsigned int value)
6020 {
6021         int cmos_cmd, inc;
6022         unsigned int current_value, i;
6023
6024         current_value = tpacpi_brightness_nvram_get();
6025
6026         if (value == current_value)
6027                 return 0;
6028
6029         cmos_cmd = (value > current_value) ?
6030                         TP_CMOS_BRIGHTNESS_UP :
6031                         TP_CMOS_BRIGHTNESS_DOWN;
6032         inc = (value > current_value) ? 1 : -1;
6033
6034         for (i = current_value; i != value; i += inc)
6035                 if (issue_thinkpad_cmos_command(cmos_cmd))
6036                         return -EIO;
6037
6038         return 0;
6039 }
6040
6041 /* May return EINTR which can always be mapped to ERESTARTSYS */
6042 static int brightness_set(unsigned int value)
6043 {
6044         int res;
6045
6046         if (value > ((tp_features.bright_16levels)? 15 : 7) ||
6047             value < 0)
6048                 return -EINVAL;
6049
6050         vdbg_printk(TPACPI_DBG_BRGHT,
6051                         "set backlight level to %d\n", value);
6052
6053         res = mutex_lock_killable(&brightness_mutex);
6054         if (res < 0)
6055                 return res;
6056
6057         switch (brightness_mode) {
6058         case TPACPI_BRGHT_MODE_EC:
6059         case TPACPI_BRGHT_MODE_ECNVRAM:
6060                 res = tpacpi_brightness_set_ec(value);
6061                 break;
6062         case TPACPI_BRGHT_MODE_UCMS_STEP:
6063                 res = tpacpi_brightness_set_ucmsstep(value);
6064                 break;
6065         default:
6066                 res = -ENXIO;
6067         }
6068
6069         mutex_unlock(&brightness_mutex);
6070         return res;
6071 }
6072
6073 /* sysfs backlight class ----------------------------------------------- */
6074
6075 static int brightness_update_status(struct backlight_device *bd)
6076 {
6077         unsigned int level =
6078                 (bd->props.fb_blank == FB_BLANK_UNBLANK &&
6079                  bd->props.power == FB_BLANK_UNBLANK) ?
6080                                 bd->props.brightness : 0;
6081
6082         dbg_printk(TPACPI_DBG_BRGHT,
6083                         "backlight: attempt to set level to %d\n",
6084                         level);
6085
6086         /* it is the backlight class's job (caller) to handle
6087          * EINTR and other errors properly */
6088         return brightness_set(level);
6089 }
6090
6091 static int brightness_get(struct backlight_device *bd)
6092 {
6093         int status, res;
6094
6095         res = mutex_lock_killable(&brightness_mutex);
6096         if (res < 0)
6097                 return 0;
6098
6099         res = tpacpi_brightness_get_raw(&status);
6100
6101         mutex_unlock(&brightness_mutex);
6102
6103         if (res < 0)
6104                 return 0;
6105
6106         return status & TP_EC_BACKLIGHT_LVLMSK;
6107 }
6108
6109 static void tpacpi_brightness_notify_change(void)
6110 {
6111         backlight_force_update(ibm_backlight_device,
6112                                BACKLIGHT_UPDATE_HOTKEY);
6113 }
6114
6115 static struct backlight_ops ibm_backlight_data = {
6116         .get_brightness = brightness_get,
6117         .update_status  = brightness_update_status,
6118 };
6119
6120 /* --------------------------------------------------------------------- */
6121
6122 /*
6123  * These are only useful for models that have only one possibility
6124  * of GPU.  If the BIOS model handles both ATI and Intel, don't use
6125  * these quirks.
6126  */
6127 #define TPACPI_BRGHT_Q_NOEC     0x0001  /* Must NOT use EC HBRV */
6128 #define TPACPI_BRGHT_Q_EC       0x0002  /* Should or must use EC HBRV */
6129 #define TPACPI_BRGHT_Q_ASK      0x8000  /* Ask for user report */
6130
6131 static const struct tpacpi_quirk brightness_quirk_table[] __initconst = {
6132         /* Models with ATI GPUs known to require ECNVRAM mode */
6133         TPACPI_Q_IBM('1', 'Y', TPACPI_BRGHT_Q_EC),      /* T43/p ATI */
6134
6135         /* Models with ATI GPUs that can use ECNVRAM */
6136         TPACPI_Q_IBM('1', 'R', TPACPI_BRGHT_Q_EC),
6137         TPACPI_Q_IBM('1', 'Q', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
6138         TPACPI_Q_IBM('7', '6', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
6139         TPACPI_Q_IBM('7', '8', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
6140
6141         /* Models with Intel Extreme Graphics 2 */
6142         TPACPI_Q_IBM('1', 'U', TPACPI_BRGHT_Q_NOEC),
6143         TPACPI_Q_IBM('1', 'V', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
6144         TPACPI_Q_IBM('1', 'W', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
6145
6146         /* Models with Intel GMA900 */
6147         TPACPI_Q_IBM('7', '0', TPACPI_BRGHT_Q_NOEC),    /* T43, R52 */
6148         TPACPI_Q_IBM('7', '4', TPACPI_BRGHT_Q_NOEC),    /* X41 */
6149         TPACPI_Q_IBM('7', '5', TPACPI_BRGHT_Q_NOEC),    /* X41 Tablet */
6150 };
6151
6152 static int __init brightness_init(struct ibm_init_struct *iibm)
6153 {
6154         int b;
6155         unsigned long quirks;
6156
6157         vdbg_printk(TPACPI_DBG_INIT, "initializing brightness subdriver\n");
6158
6159         mutex_init(&brightness_mutex);
6160
6161         quirks = tpacpi_check_quirks(brightness_quirk_table,
6162                                 ARRAY_SIZE(brightness_quirk_table));
6163
6164         /*
6165          * We always attempt to detect acpi support, so as to switch
6166          * Lenovo Vista BIOS to ACPI brightness mode even if we are not
6167          * going to publish a backlight interface
6168          */
6169         b = tpacpi_check_std_acpi_brightness_support();
6170         if (b > 0) {
6171
6172                 if (acpi_video_backlight_support()) {
6173                         if (brightness_enable > 1) {
6174                                 printk(TPACPI_NOTICE
6175                                        "Standard ACPI backlight interface "
6176                                        "available, not loading native one.\n");
6177                                 return 1;
6178                         } else if (brightness_enable == 1) {
6179                                 printk(TPACPI_NOTICE
6180                                        "Backlight control force enabled, even if standard "
6181                                        "ACPI backlight interface is available\n");
6182                         }
6183                 } else {
6184                         if (brightness_enable > 1) {
6185                                 printk(TPACPI_NOTICE
6186                                        "Standard ACPI backlight interface not "
6187                                        "available, thinkpad_acpi native "
6188                                        "brightness control enabled\n");
6189                         }
6190                 }
6191         }
6192
6193         if (!brightness_enable) {
6194                 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT,
6195                            "brightness support disabled by "
6196                            "module parameter\n");
6197                 return 1;
6198         }
6199
6200         if (b > 16) {
6201                 printk(TPACPI_ERR
6202                        "Unsupported brightness interface, "
6203                        "please contact %s\n", TPACPI_MAIL);
6204                 return 1;
6205         }
6206         if (b == 16)
6207                 tp_features.bright_16levels = 1;
6208
6209         /*
6210          * Check for module parameter bogosity, note that we
6211          * init brightness_mode to TPACPI_BRGHT_MODE_MAX in order to be
6212          * able to detect "unspecified"
6213          */
6214         if (brightness_mode > TPACPI_BRGHT_MODE_MAX)
6215                 return -EINVAL;
6216
6217         /* TPACPI_BRGHT_MODE_AUTO not implemented yet, just use default */
6218         if (brightness_mode == TPACPI_BRGHT_MODE_AUTO ||
6219             brightness_mode == TPACPI_BRGHT_MODE_MAX) {
6220                 if (quirks & TPACPI_BRGHT_Q_EC)
6221                         brightness_mode = TPACPI_BRGHT_MODE_ECNVRAM;
6222                 else
6223                         brightness_mode = TPACPI_BRGHT_MODE_UCMS_STEP;
6224
6225                 dbg_printk(TPACPI_DBG_BRGHT,
6226                            "driver auto-selected brightness_mode=%d\n",
6227                            brightness_mode);
6228         }
6229
6230         /* Safety */
6231         if (thinkpad_id.vendor != PCI_VENDOR_ID_IBM &&
6232             (brightness_mode == TPACPI_BRGHT_MODE_ECNVRAM ||
6233              brightness_mode == TPACPI_BRGHT_MODE_EC))
6234                 return -EINVAL;
6235
6236         if (tpacpi_brightness_get_raw(&b) < 0)
6237                 return 1;
6238
6239         if (tp_features.bright_16levels)
6240                 printk(TPACPI_INFO
6241                        "detected a 16-level brightness capable ThinkPad\n");
6242
6243         ibm_backlight_device = backlight_device_register(
6244                                         TPACPI_BACKLIGHT_DEV_NAME, NULL, NULL,
6245                                         &ibm_backlight_data);
6246         if (IS_ERR(ibm_backlight_device)) {
6247                 int rc = PTR_ERR(ibm_backlight_device);
6248                 ibm_backlight_device = NULL;
6249                 printk(TPACPI_ERR "Could not register backlight device\n");
6250                 return rc;
6251         }
6252         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT,
6253                         "brightness is supported\n");
6254
6255         if (quirks & TPACPI_BRGHT_Q_ASK) {
6256                 printk(TPACPI_NOTICE
6257                         "brightness: will use unverified default: "
6258                         "brightness_mode=%d\n", brightness_mode);
6259                 printk(TPACPI_NOTICE
6260                         "brightness: please report to %s whether it works well "
6261                         "or not on your ThinkPad\n", TPACPI_MAIL);
6262         }
6263
6264         ibm_backlight_device->props.max_brightness =
6265                                 (tp_features.bright_16levels)? 15 : 7;
6266         ibm_backlight_device->props.brightness = b & TP_EC_BACKLIGHT_LVLMSK;
6267         backlight_update_status(ibm_backlight_device);