ACPI: thinkpad-acpi: start the event hunt season
[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) 2006-2008 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 "0.21"
25 #define TPACPI_SYSFS_VERSION 0x020200
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/kthread.h>
58 #include <linux/freezer.h>
59 #include <linux/delay.h>
60
61 #include <linux/nvram.h>
62 #include <linux/proc_fs.h>
63 #include <linux/sysfs.h>
64 #include <linux/backlight.h>
65 #include <linux/fb.h>
66 #include <linux/platform_device.h>
67 #include <linux/hwmon.h>
68 #include <linux/hwmon-sysfs.h>
69 #include <linux/input.h>
70 #include <linux/leds.h>
71 #include <linux/rfkill.h>
72 #include <asm/uaccess.h>
73
74 #include <linux/dmi.h>
75 #include <linux/jiffies.h>
76 #include <linux/workqueue.h>
77
78 #include <acpi/acpi_drivers.h>
79
80 #include <linux/pci_ids.h>
81
82
83 /* ThinkPad CMOS commands */
84 #define TP_CMOS_VOLUME_DOWN     0
85 #define TP_CMOS_VOLUME_UP       1
86 #define TP_CMOS_VOLUME_MUTE     2
87 #define TP_CMOS_BRIGHTNESS_UP   4
88 #define TP_CMOS_BRIGHTNESS_DOWN 5
89 #define TP_CMOS_THINKLIGHT_ON   12
90 #define TP_CMOS_THINKLIGHT_OFF  13
91
92 /* NVRAM Addresses */
93 enum tp_nvram_addr {
94         TP_NVRAM_ADDR_HK2               = 0x57,
95         TP_NVRAM_ADDR_THINKLIGHT        = 0x58,
96         TP_NVRAM_ADDR_VIDEO             = 0x59,
97         TP_NVRAM_ADDR_BRIGHTNESS        = 0x5e,
98         TP_NVRAM_ADDR_MIXER             = 0x60,
99 };
100
101 /* NVRAM bit masks */
102 enum {
103         TP_NVRAM_MASK_HKT_THINKPAD      = 0x08,
104         TP_NVRAM_MASK_HKT_ZOOM          = 0x20,
105         TP_NVRAM_MASK_HKT_DISPLAY       = 0x40,
106         TP_NVRAM_MASK_HKT_HIBERNATE     = 0x80,
107         TP_NVRAM_MASK_THINKLIGHT        = 0x10,
108         TP_NVRAM_MASK_HKT_DISPEXPND     = 0x30,
109         TP_NVRAM_MASK_HKT_BRIGHTNESS    = 0x20,
110         TP_NVRAM_MASK_LEVEL_BRIGHTNESS  = 0x0f,
111         TP_NVRAM_POS_LEVEL_BRIGHTNESS   = 0,
112         TP_NVRAM_MASK_MUTE              = 0x40,
113         TP_NVRAM_MASK_HKT_VOLUME        = 0x80,
114         TP_NVRAM_MASK_LEVEL_VOLUME      = 0x0f,
115         TP_NVRAM_POS_LEVEL_VOLUME       = 0,
116 };
117
118 /* ACPI HIDs */
119 #define TPACPI_ACPI_HKEY_HID            "IBM0068"
120
121 /* Input IDs */
122 #define TPACPI_HKEY_INPUT_PRODUCT       0x5054 /* "TP" */
123 #define TPACPI_HKEY_INPUT_VERSION       0x4101
124
125 /* ACPI \WGSV commands */
126 enum {
127         TP_ACPI_WGSV_GET_STATE          = 0x01, /* Get state information */
128         TP_ACPI_WGSV_PWR_ON_ON_RESUME   = 0x02, /* Resume WWAN powered on */
129         TP_ACPI_WGSV_PWR_OFF_ON_RESUME  = 0x03, /* Resume WWAN powered off */
130         TP_ACPI_WGSV_SAVE_STATE         = 0x04, /* Save state for S4/S5 */
131 };
132
133 /* TP_ACPI_WGSV_GET_STATE bits */
134 enum {
135         TP_ACPI_WGSV_STATE_WWANEXIST    = 0x0001, /* WWAN hw available */
136         TP_ACPI_WGSV_STATE_WWANPWR      = 0x0002, /* WWAN radio enabled */
137         TP_ACPI_WGSV_STATE_WWANPWRRES   = 0x0004, /* WWAN state at resume */
138         TP_ACPI_WGSV_STATE_WWANBIOSOFF  = 0x0008, /* WWAN disabled in BIOS */
139         TP_ACPI_WGSV_STATE_BLTHEXIST    = 0x0001, /* BLTH hw available */
140         TP_ACPI_WGSV_STATE_BLTHPWR      = 0x0002, /* BLTH radio enabled */
141         TP_ACPI_WGSV_STATE_BLTHPWRRES   = 0x0004, /* BLTH state at resume */
142         TP_ACPI_WGSV_STATE_BLTHBIOSOFF  = 0x0008, /* BLTH disabled in BIOS */
143         TP_ACPI_WGSV_STATE_UWBEXIST     = 0x0010, /* UWB hw available */
144         TP_ACPI_WGSV_STATE_UWBPWR       = 0x0020, /* UWB radio enabled */
145 };
146
147 /****************************************************************************
148  * Main driver
149  */
150
151 #define TPACPI_NAME "thinkpad"
152 #define TPACPI_DESC "ThinkPad ACPI Extras"
153 #define TPACPI_FILE TPACPI_NAME "_acpi"
154 #define TPACPI_URL "http://ibm-acpi.sf.net/"
155 #define TPACPI_MAIL "ibm-acpi-devel@lists.sourceforge.net"
156
157 #define TPACPI_PROC_DIR "ibm"
158 #define TPACPI_ACPI_EVENT_PREFIX "ibm"
159 #define TPACPI_DRVR_NAME TPACPI_FILE
160 #define TPACPI_DRVR_SHORTNAME "tpacpi"
161 #define TPACPI_HWMON_DRVR_NAME TPACPI_NAME "_hwmon"
162
163 #define TPACPI_NVRAM_KTHREAD_NAME "ktpacpi_nvramd"
164 #define TPACPI_WORKQUEUE_NAME "ktpacpid"
165
166 #define TPACPI_MAX_ACPI_ARGS 3
167
168 /* rfkill switches */
169 enum {
170         TPACPI_RFK_BLUETOOTH_SW_ID = 0,
171         TPACPI_RFK_WWAN_SW_ID,
172         TPACPI_RFK_UWB_SW_ID,
173 };
174
175 /* Debugging */
176 #define TPACPI_LOG TPACPI_FILE ": "
177 #define TPACPI_ALERT    KERN_ALERT  TPACPI_LOG
178 #define TPACPI_CRIT     KERN_CRIT   TPACPI_LOG
179 #define TPACPI_ERR      KERN_ERR    TPACPI_LOG
180 #define TPACPI_NOTICE   KERN_NOTICE TPACPI_LOG
181 #define TPACPI_INFO     KERN_INFO   TPACPI_LOG
182 #define TPACPI_DEBUG    KERN_DEBUG  TPACPI_LOG
183
184 #define TPACPI_DBG_ALL          0xffff
185 #define TPACPI_DBG_INIT         0x0001
186 #define TPACPI_DBG_EXIT         0x0002
187 #define dbg_printk(a_dbg_level, format, arg...) \
188         do { if (dbg_level & a_dbg_level) \
189                 printk(TPACPI_DEBUG "%s: " format, __func__ , ## arg); \
190         } while (0)
191 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
192 #define vdbg_printk(a_dbg_level, format, arg...) \
193         dbg_printk(a_dbg_level, format, ## arg)
194 static const char *str_supported(int is_supported);
195 #else
196 #define vdbg_printk(a_dbg_level, format, arg...)
197 #endif
198
199 #define onoff(status, bit) ((status) & (1 << (bit)) ? "on" : "off")
200 #define enabled(status, bit) ((status) & (1 << (bit)) ? "enabled" : "disabled")
201 #define strlencmp(a, b) (strncmp((a), (b), strlen(b)))
202
203
204 /****************************************************************************
205  * Driver-wide structs and misc. variables
206  */
207
208 struct ibm_struct;
209
210 struct tp_acpi_drv_struct {
211         const struct acpi_device_id *hid;
212         struct acpi_driver *driver;
213
214         void (*notify) (struct ibm_struct *, u32);
215         acpi_handle *handle;
216         u32 type;
217         struct acpi_device *device;
218 };
219
220 struct ibm_struct {
221         char *name;
222
223         int (*read) (char *);
224         int (*write) (char *);
225         void (*exit) (void);
226         void (*resume) (void);
227         void (*suspend) (pm_message_t state);
228         void (*shutdown) (void);
229
230         struct list_head all_drivers;
231
232         struct tp_acpi_drv_struct *acpi;
233
234         struct {
235                 u8 acpi_driver_registered:1;
236                 u8 acpi_notify_installed:1;
237                 u8 proc_created:1;
238                 u8 init_called:1;
239                 u8 experimental:1;
240         } flags;
241 };
242
243 struct ibm_init_struct {
244         char param[32];
245
246         int (*init) (struct ibm_init_struct *);
247         struct ibm_struct *data;
248 };
249
250 static struct {
251 #ifdef CONFIG_THINKPAD_ACPI_BAY
252         u32 bay_status:1;
253         u32 bay_eject:1;
254         u32 bay_status2:1;
255         u32 bay_eject2:1;
256 #endif
257         u32 bluetooth:1;
258         u32 hotkey:1;
259         u32 hotkey_mask:1;
260         u32 hotkey_wlsw:1;
261         u32 hotkey_tablet:1;
262         u32 light:1;
263         u32 light_status:1;
264         u32 bright_16levels:1;
265         u32 bright_acpimode:1;
266         u32 wan:1;
267         u32 uwb:1;
268         u32 fan_ctrl_status_undef:1;
269         u32 input_device_registered:1;
270         u32 platform_drv_registered:1;
271         u32 platform_drv_attrs_registered:1;
272         u32 sensors_pdrv_registered:1;
273         u32 sensors_pdrv_attrs_registered:1;
274         u32 sensors_pdev_attrs_registered:1;
275         u32 hotkey_poll_active:1;
276 } tp_features;
277
278 static struct {
279         u16 hotkey_mask_ff:1;
280         u16 bright_cmos_ec_unsync:1;
281 } tp_warned;
282
283 struct thinkpad_id_data {
284         unsigned int vendor;    /* ThinkPad vendor:
285                                  * PCI_VENDOR_ID_IBM/PCI_VENDOR_ID_LENOVO */
286
287         char *bios_version_str; /* Something like 1ZET51WW (1.03z) */
288         char *ec_version_str;   /* Something like 1ZHT51WW-1.04a */
289
290         u16 bios_model;         /* Big Endian, TP-1Y = 0x5931, 0 = unknown */
291         u16 ec_model;
292
293         char *model_str;        /* ThinkPad T43 */
294         char *nummodel_str;     /* 9384A9C for a 9384-A9C model */
295 };
296 static struct thinkpad_id_data thinkpad_id;
297
298 static enum {
299         TPACPI_LIFE_INIT = 0,
300         TPACPI_LIFE_RUNNING,
301         TPACPI_LIFE_EXITING,
302 } tpacpi_lifecycle;
303
304 static int experimental;
305 static u32 dbg_level;
306
307 static struct workqueue_struct *tpacpi_wq;
308
309 /* Special LED class that can defer work */
310 struct tpacpi_led_classdev {
311         struct led_classdev led_classdev;
312         struct work_struct work;
313         enum led_brightness new_brightness;
314         unsigned int led;
315 };
316
317 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
318 static int dbg_wlswemul;
319 static int tpacpi_wlsw_emulstate;
320 static int dbg_bluetoothemul;
321 static int tpacpi_bluetooth_emulstate;
322 static int dbg_wwanemul;
323 static int tpacpi_wwan_emulstate;
324 static int dbg_uwbemul;
325 static int tpacpi_uwb_emulstate;
326 #endif
327
328
329 /****************************************************************************
330  ****************************************************************************
331  *
332  * ACPI Helpers and device model
333  *
334  ****************************************************************************
335  ****************************************************************************/
336
337 /*************************************************************************
338  * ACPI basic handles
339  */
340
341 static acpi_handle root_handle;
342
343 #define TPACPI_HANDLE(object, parent, paths...)                 \
344         static acpi_handle  object##_handle;                    \
345         static acpi_handle *object##_parent = &parent##_handle; \
346         static char        *object##_path;                      \
347         static char        *object##_paths[] = { paths }
348
349 TPACPI_HANDLE(ec, root, "\\_SB.PCI0.ISA.EC0",   /* 240, 240x */
350            "\\_SB.PCI.ISA.EC",  /* 570 */
351            "\\_SB.PCI0.ISA0.EC0",       /* 600e/x, 770e, 770x */
352            "\\_SB.PCI0.ISA.EC", /* A21e, A2xm/p, T20-22, X20-21 */
353            "\\_SB.PCI0.AD4S.EC0",       /* i1400, R30 */
354            "\\_SB.PCI0.ICH3.EC0",       /* R31 */
355            "\\_SB.PCI0.LPC.EC", /* all others */
356            );
357
358 TPACPI_HANDLE(ecrd, ec, "ECRD");        /* 570 */
359 TPACPI_HANDLE(ecwr, ec, "ECWR");        /* 570 */
360
361 TPACPI_HANDLE(cmos, root, "\\UCMS",     /* R50, R50e, R50p, R51, */
362                                         /* T4x, X31, X40 */
363            "\\CMOS",            /* A3x, G4x, R32, T23, T30, X22-24, X30 */
364            "\\CMS",             /* R40, R40e */
365            );                   /* all others */
366
367 TPACPI_HANDLE(hkey, ec, "\\_SB.HKEY",   /* 600e/x, 770e, 770x */
368            "^HKEY",             /* R30, R31 */
369            "HKEY",              /* all others */
370            );                   /* 570 */
371
372 TPACPI_HANDLE(vid, root, "\\_SB.PCI.AGP.VGA",   /* 570 */
373            "\\_SB.PCI0.AGP0.VID0",      /* 600e/x, 770x */
374            "\\_SB.PCI0.VID0",   /* 770e */
375            "\\_SB.PCI0.VID",    /* A21e, G4x, R50e, X30, X40 */
376            "\\_SB.PCI0.AGP.VID",        /* all others */
377            );                           /* R30, R31 */
378
379
380 /*************************************************************************
381  * ACPI helpers
382  */
383
384 static int acpi_evalf(acpi_handle handle,
385                       void *res, char *method, char *fmt, ...)
386 {
387         char *fmt0 = fmt;
388         struct acpi_object_list params;
389         union acpi_object in_objs[TPACPI_MAX_ACPI_ARGS];
390         struct acpi_buffer result, *resultp;
391         union acpi_object out_obj;
392         acpi_status status;
393         va_list ap;
394         char res_type;
395         int success;
396         int quiet;
397
398         if (!*fmt) {
399                 printk(TPACPI_ERR "acpi_evalf() called with empty format\n");
400                 return 0;
401         }
402
403         if (*fmt == 'q') {
404                 quiet = 1;
405                 fmt++;
406         } else
407                 quiet = 0;
408
409         res_type = *(fmt++);
410
411         params.count = 0;
412         params.pointer = &in_objs[0];
413
414         va_start(ap, fmt);
415         while (*fmt) {
416                 char c = *(fmt++);
417                 switch (c) {
418                 case 'd':       /* int */
419                         in_objs[params.count].integer.value = va_arg(ap, int);
420                         in_objs[params.count++].type = ACPI_TYPE_INTEGER;
421                         break;
422                         /* add more types as needed */
423                 default:
424                         printk(TPACPI_ERR "acpi_evalf() called "
425                                "with invalid format character '%c'\n", c);
426                         return 0;
427                 }
428         }
429         va_end(ap);
430
431         if (res_type != 'v') {
432                 result.length = sizeof(out_obj);
433                 result.pointer = &out_obj;
434                 resultp = &result;
435         } else
436                 resultp = NULL;
437
438         status = acpi_evaluate_object(handle, method, &params, resultp);
439
440         switch (res_type) {
441         case 'd':               /* int */
442                 if (res)
443                         *(int *)res = out_obj.integer.value;
444                 success = status == AE_OK && out_obj.type == ACPI_TYPE_INTEGER;
445                 break;
446         case 'v':               /* void */
447                 success = status == AE_OK;
448                 break;
449                 /* add more types as needed */
450         default:
451                 printk(TPACPI_ERR "acpi_evalf() called "
452                        "with invalid format character '%c'\n", res_type);
453                 return 0;
454         }
455
456         if (!success && !quiet)
457                 printk(TPACPI_ERR "acpi_evalf(%s, %s, ...) failed: %d\n",
458                        method, fmt0, status);
459
460         return success;
461 }
462
463 static int acpi_ec_read(int i, u8 *p)
464 {
465         int v;
466
467         if (ecrd_handle) {
468                 if (!acpi_evalf(ecrd_handle, &v, NULL, "dd", i))
469                         return 0;
470                 *p = v;
471         } else {
472                 if (ec_read(i, p) < 0)
473                         return 0;
474         }
475
476         return 1;
477 }
478
479 static int acpi_ec_write(int i, u8 v)
480 {
481         if (ecwr_handle) {
482                 if (!acpi_evalf(ecwr_handle, NULL, NULL, "vdd", i, v))
483                         return 0;
484         } else {
485                 if (ec_write(i, v) < 0)
486                         return 0;
487         }
488
489         return 1;
490 }
491
492 #if defined(CONFIG_THINKPAD_ACPI_DOCK) || defined(CONFIG_THINKPAD_ACPI_BAY)
493 static int _sta(acpi_handle handle)
494 {
495         int status;
496
497         if (!handle || !acpi_evalf(handle, &status, "_STA", "d"))
498                 status = 0;
499
500         return status;
501 }
502 #endif
503
504 static int issue_thinkpad_cmos_command(int cmos_cmd)
505 {
506         if (!cmos_handle)
507                 return -ENXIO;
508
509         if (!acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd))
510                 return -EIO;
511
512         return 0;
513 }
514
515 /*************************************************************************
516  * ACPI device model
517  */
518
519 #define TPACPI_ACPIHANDLE_INIT(object) \
520         drv_acpi_handle_init(#object, &object##_handle, *object##_parent, \
521                 object##_paths, ARRAY_SIZE(object##_paths), &object##_path)
522
523 static void drv_acpi_handle_init(char *name,
524                            acpi_handle *handle, acpi_handle parent,
525                            char **paths, int num_paths, char **path)
526 {
527         int i;
528         acpi_status status;
529
530         vdbg_printk(TPACPI_DBG_INIT, "trying to locate ACPI handle for %s\n",
531                 name);
532
533         for (i = 0; i < num_paths; i++) {
534                 status = acpi_get_handle(parent, paths[i], handle);
535                 if (ACPI_SUCCESS(status)) {
536                         *path = paths[i];
537                         dbg_printk(TPACPI_DBG_INIT,
538                                    "Found ACPI handle %s for %s\n",
539                                    *path, name);
540                         return;
541                 }
542         }
543
544         vdbg_printk(TPACPI_DBG_INIT, "ACPI handle for %s not found\n",
545                     name);
546         *handle = NULL;
547 }
548
549 static void dispatch_acpi_notify(acpi_handle handle, u32 event, void *data)
550 {
551         struct ibm_struct *ibm = data;
552
553         if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
554                 return;
555
556         if (!ibm || !ibm->acpi || !ibm->acpi->notify)
557                 return;
558
559         ibm->acpi->notify(ibm, event);
560 }
561
562 static int __init setup_acpi_notify(struct ibm_struct *ibm)
563 {
564         acpi_status status;
565         int rc;
566
567         BUG_ON(!ibm->acpi);
568
569         if (!*ibm->acpi->handle)
570                 return 0;
571
572         vdbg_printk(TPACPI_DBG_INIT,
573                 "setting up ACPI notify for %s\n", ibm->name);
574
575         rc = acpi_bus_get_device(*ibm->acpi->handle, &ibm->acpi->device);
576         if (rc < 0) {
577                 printk(TPACPI_ERR "acpi_bus_get_device(%s) failed: %d\n",
578                         ibm->name, rc);
579                 return -ENODEV;
580         }
581
582         ibm->acpi->device->driver_data = ibm;
583         sprintf(acpi_device_class(ibm->acpi->device), "%s/%s",
584                 TPACPI_ACPI_EVENT_PREFIX,
585                 ibm->name);
586
587         status = acpi_install_notify_handler(*ibm->acpi->handle,
588                         ibm->acpi->type, dispatch_acpi_notify, ibm);
589         if (ACPI_FAILURE(status)) {
590                 if (status == AE_ALREADY_EXISTS) {
591                         printk(TPACPI_NOTICE
592                                "another device driver is already "
593                                "handling %s events\n", ibm->name);
594                 } else {
595                         printk(TPACPI_ERR
596                                "acpi_install_notify_handler(%s) failed: %d\n",
597                                ibm->name, status);
598                 }
599                 return -ENODEV;
600         }
601         ibm->flags.acpi_notify_installed = 1;
602         return 0;
603 }
604
605 static int __init tpacpi_device_add(struct acpi_device *device)
606 {
607         return 0;
608 }
609
610 static int __init register_tpacpi_subdriver(struct ibm_struct *ibm)
611 {
612         int rc;
613
614         dbg_printk(TPACPI_DBG_INIT,
615                 "registering %s as an ACPI driver\n", ibm->name);
616
617         BUG_ON(!ibm->acpi);
618
619         ibm->acpi->driver = kzalloc(sizeof(struct acpi_driver), GFP_KERNEL);
620         if (!ibm->acpi->driver) {
621                 printk(TPACPI_ERR
622                        "failed to allocate memory for ibm->acpi->driver\n");
623                 return -ENOMEM;
624         }
625
626         sprintf(ibm->acpi->driver->name, "%s_%s", TPACPI_NAME, ibm->name);
627         ibm->acpi->driver->ids = ibm->acpi->hid;
628
629         ibm->acpi->driver->ops.add = &tpacpi_device_add;
630
631         rc = acpi_bus_register_driver(ibm->acpi->driver);
632         if (rc < 0) {
633                 printk(TPACPI_ERR "acpi_bus_register_driver(%s) failed: %d\n",
634                        ibm->name, rc);
635                 kfree(ibm->acpi->driver);
636                 ibm->acpi->driver = NULL;
637         } else if (!rc)
638                 ibm->flags.acpi_driver_registered = 1;
639
640         return rc;
641 }
642
643
644 /****************************************************************************
645  ****************************************************************************
646  *
647  * Procfs Helpers
648  *
649  ****************************************************************************
650  ****************************************************************************/
651
652 static int dispatch_procfs_read(char *page, char **start, off_t off,
653                         int count, int *eof, void *data)
654 {
655         struct ibm_struct *ibm = data;
656         int len;
657
658         if (!ibm || !ibm->read)
659                 return -EINVAL;
660
661         len = ibm->read(page);
662         if (len < 0)
663                 return len;
664
665         if (len <= off + count)
666                 *eof = 1;
667         *start = page + off;
668         len -= off;
669         if (len > count)
670                 len = count;
671         if (len < 0)
672                 len = 0;
673
674         return len;
675 }
676
677 static int dispatch_procfs_write(struct file *file,
678                         const char __user *userbuf,
679                         unsigned long count, void *data)
680 {
681         struct ibm_struct *ibm = data;
682         char *kernbuf;
683         int ret;
684
685         if (!ibm || !ibm->write)
686                 return -EINVAL;
687
688         kernbuf = kmalloc(count + 2, GFP_KERNEL);
689         if (!kernbuf)
690                 return -ENOMEM;
691
692         if (copy_from_user(kernbuf, userbuf, count)) {
693                 kfree(kernbuf);
694                 return -EFAULT;
695         }
696
697         kernbuf[count] = 0;
698         strcat(kernbuf, ",");
699         ret = ibm->write(kernbuf);
700         if (ret == 0)
701                 ret = count;
702
703         kfree(kernbuf);
704
705         return ret;
706 }
707
708 static char *next_cmd(char **cmds)
709 {
710         char *start = *cmds;
711         char *end;
712
713         while ((end = strchr(start, ',')) && end == start)
714                 start = end + 1;
715
716         if (!end)
717                 return NULL;
718
719         *end = 0;
720         *cmds = end + 1;
721         return start;
722 }
723
724
725 /****************************************************************************
726  ****************************************************************************
727  *
728  * Device model: input, hwmon and platform
729  *
730  ****************************************************************************
731  ****************************************************************************/
732
733 static struct platform_device *tpacpi_pdev;
734 static struct platform_device *tpacpi_sensors_pdev;
735 static struct device *tpacpi_hwmon;
736 static struct input_dev *tpacpi_inputdev;
737 static struct mutex tpacpi_inputdev_send_mutex;
738 static LIST_HEAD(tpacpi_all_drivers);
739
740 static int tpacpi_suspend_handler(struct platform_device *pdev,
741                                   pm_message_t state)
742 {
743         struct ibm_struct *ibm, *itmp;
744
745         list_for_each_entry_safe(ibm, itmp,
746                                  &tpacpi_all_drivers,
747                                  all_drivers) {
748                 if (ibm->suspend)
749                         (ibm->suspend)(state);
750         }
751
752         return 0;
753 }
754
755 static int tpacpi_resume_handler(struct platform_device *pdev)
756 {
757         struct ibm_struct *ibm, *itmp;
758
759         list_for_each_entry_safe(ibm, itmp,
760                                  &tpacpi_all_drivers,
761                                  all_drivers) {
762                 if (ibm->resume)
763                         (ibm->resume)();
764         }
765
766         return 0;
767 }
768
769 static void tpacpi_shutdown_handler(struct platform_device *pdev)
770 {
771         struct ibm_struct *ibm, *itmp;
772
773         list_for_each_entry_safe(ibm, itmp,
774                                  &tpacpi_all_drivers,
775                                  all_drivers) {
776                 if (ibm->shutdown)
777                         (ibm->shutdown)();
778         }
779 }
780
781 static struct platform_driver tpacpi_pdriver = {
782         .driver = {
783                 .name = TPACPI_DRVR_NAME,
784                 .owner = THIS_MODULE,
785         },
786         .suspend = tpacpi_suspend_handler,
787         .resume = tpacpi_resume_handler,
788         .shutdown = tpacpi_shutdown_handler,
789 };
790
791 static struct platform_driver tpacpi_hwmon_pdriver = {
792         .driver = {
793                 .name = TPACPI_HWMON_DRVR_NAME,
794                 .owner = THIS_MODULE,
795         },
796 };
797
798 /*************************************************************************
799  * sysfs support helpers
800  */
801
802 struct attribute_set {
803         unsigned int members, max_members;
804         struct attribute_group group;
805 };
806
807 struct attribute_set_obj {
808         struct attribute_set s;
809         struct attribute *a;
810 } __attribute__((packed));
811
812 static struct attribute_set *create_attr_set(unsigned int max_members,
813                                                 const char *name)
814 {
815         struct attribute_set_obj *sobj;
816
817         if (max_members == 0)
818                 return NULL;
819
820         /* Allocates space for implicit NULL at the end too */
821         sobj = kzalloc(sizeof(struct attribute_set_obj) +
822                     max_members * sizeof(struct attribute *),
823                     GFP_KERNEL);
824         if (!sobj)
825                 return NULL;
826         sobj->s.max_members = max_members;
827         sobj->s.group.attrs = &sobj->a;
828         sobj->s.group.name = name;
829
830         return &sobj->s;
831 }
832
833 #define destroy_attr_set(_set) \
834         kfree(_set);
835
836 /* not multi-threaded safe, use it in a single thread per set */
837 static int add_to_attr_set(struct attribute_set *s, struct attribute *attr)
838 {
839         if (!s || !attr)
840                 return -EINVAL;
841
842         if (s->members >= s->max_members)
843                 return -ENOMEM;
844
845         s->group.attrs[s->members] = attr;
846         s->members++;
847
848         return 0;
849 }
850
851 static int add_many_to_attr_set(struct attribute_set *s,
852                         struct attribute **attr,
853                         unsigned int count)
854 {
855         int i, res;
856
857         for (i = 0; i < count; i++) {
858                 res = add_to_attr_set(s, attr[i]);
859                 if (res)
860                         return res;
861         }
862
863         return 0;
864 }
865
866 static void delete_attr_set(struct attribute_set *s, struct kobject *kobj)
867 {
868         sysfs_remove_group(kobj, &s->group);
869         destroy_attr_set(s);
870 }
871
872 #define register_attr_set_with_sysfs(_attr_set, _kobj) \
873         sysfs_create_group(_kobj, &_attr_set->group)
874
875 static int parse_strtoul(const char *buf,
876                 unsigned long max, unsigned long *value)
877 {
878         char *endp;
879
880         while (*buf && isspace(*buf))
881                 buf++;
882         *value = simple_strtoul(buf, &endp, 0);
883         while (*endp && isspace(*endp))
884                 endp++;
885         if (*endp || *value > max)
886                 return -EINVAL;
887
888         return 0;
889 }
890
891 static void tpacpi_disable_brightness_delay(void)
892 {
893         if (acpi_evalf(hkey_handle, NULL, "PWMS", "qvd", 0))
894                 printk(TPACPI_NOTICE
895                         "ACPI backlight control delay disabled\n");
896 }
897
898 static int __init tpacpi_query_bcl_levels(acpi_handle handle)
899 {
900         struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
901         union acpi_object *obj;
902         int rc;
903
904         if (ACPI_SUCCESS(acpi_evaluate_object(handle, NULL, NULL, &buffer))) {
905                 obj = (union acpi_object *)buffer.pointer;
906                 if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) {
907                         printk(TPACPI_ERR "Unknown _BCL data, "
908                                "please report this to %s\n", TPACPI_MAIL);
909                         rc = 0;
910                 } else {
911                         rc = obj->package.count;
912                 }
913         } else {
914                 return 0;
915         }
916
917         kfree(buffer.pointer);
918         return rc;
919 }
920
921 static acpi_status __init tpacpi_acpi_walk_find_bcl(acpi_handle handle,
922                                         u32 lvl, void *context, void **rv)
923 {
924         char name[ACPI_PATH_SEGMENT_LENGTH];
925         struct acpi_buffer buffer = { sizeof(name), &name };
926
927         if (ACPI_SUCCESS(acpi_get_name(handle, ACPI_SINGLE_NAME, &buffer)) &&
928             !strncmp("_BCL", name, sizeof(name) - 1)) {
929                 BUG_ON(!rv || !*rv);
930                 **(int **)rv = tpacpi_query_bcl_levels(handle);
931                 return AE_CTRL_TERMINATE;
932         } else {
933                 return AE_OK;
934         }
935 }
936
937 /*
938  * Returns 0 (no ACPI _BCL or _BCL invalid), or size of brightness map
939  */
940 static int __init tpacpi_check_std_acpi_brightness_support(void)
941 {
942         int status;
943         int bcl_levels = 0;
944         void *bcl_ptr = &bcl_levels;
945
946         if (!vid_handle) {
947                 TPACPI_ACPIHANDLE_INIT(vid);
948         }
949         if (!vid_handle)
950                 return 0;
951
952         /*
953          * Search for a _BCL method, and execute it.  This is safe on all
954          * ThinkPads, and as a side-effect, _BCL will place a Lenovo Vista
955          * BIOS in ACPI backlight control mode.  We do NOT have to care
956          * about calling the _BCL method in an enabled video device, any
957          * will do for our purposes.
958          */
959
960         status = acpi_walk_namespace(ACPI_TYPE_METHOD, vid_handle, 3,
961                                      tpacpi_acpi_walk_find_bcl, NULL,
962                                      &bcl_ptr);
963
964         if (ACPI_SUCCESS(status) && bcl_levels > 2) {
965                 tp_features.bright_acpimode = 1;
966                 return (bcl_levels - 2);
967         }
968
969         return 0;
970 }
971
972 static int __init tpacpi_new_rfkill(const unsigned int id,
973                         struct rfkill **rfk,
974                         const enum rfkill_type rfktype,
975                         const char *name,
976                         const bool set_default,
977                         int (*toggle_radio)(void *, enum rfkill_state),
978                         int (*get_state)(void *, enum rfkill_state *))
979 {
980         int res;
981         enum rfkill_state initial_state = RFKILL_STATE_SOFT_BLOCKED;
982
983         res = get_state(NULL, &initial_state);
984         if (res < 0) {
985                 printk(TPACPI_ERR
986                         "failed to read initial state for %s, error %d; "
987                         "will turn radio off\n", name, res);
988         } else if (set_default) {
989                 /* try to set the initial state as the default for the rfkill
990                  * type, since we ask the firmware to preserve it across S5 in
991                  * NVRAM */
992                 rfkill_set_default(rfktype,
993                                 (initial_state == RFKILL_STATE_UNBLOCKED) ?
994                                         RFKILL_STATE_UNBLOCKED :
995                                         RFKILL_STATE_SOFT_BLOCKED);
996         }
997
998         *rfk = rfkill_allocate(&tpacpi_pdev->dev, rfktype);
999         if (!*rfk) {
1000                 printk(TPACPI_ERR
1001                         "failed to allocate memory for rfkill class\n");
1002                 return -ENOMEM;
1003         }
1004
1005         (*rfk)->name = name;
1006         (*rfk)->get_state = get_state;
1007         (*rfk)->toggle_radio = toggle_radio;
1008         (*rfk)->state = initial_state;
1009
1010         res = rfkill_register(*rfk);
1011         if (res < 0) {
1012                 printk(TPACPI_ERR
1013                         "failed to register %s rfkill switch: %d\n",
1014                         name, res);
1015                 rfkill_free(*rfk);
1016                 *rfk = NULL;
1017                 return res;
1018         }
1019
1020         return 0;
1021 }
1022
1023 /*************************************************************************
1024  * thinkpad-acpi driver attributes
1025  */
1026
1027 /* interface_version --------------------------------------------------- */
1028 static ssize_t tpacpi_driver_interface_version_show(
1029                                 struct device_driver *drv,
1030                                 char *buf)
1031 {
1032         return snprintf(buf, PAGE_SIZE, "0x%08x\n", TPACPI_SYSFS_VERSION);
1033 }
1034
1035 static DRIVER_ATTR(interface_version, S_IRUGO,
1036                 tpacpi_driver_interface_version_show, NULL);
1037
1038 /* debug_level --------------------------------------------------------- */
1039 static ssize_t tpacpi_driver_debug_show(struct device_driver *drv,
1040                                                 char *buf)
1041 {
1042         return snprintf(buf, PAGE_SIZE, "0x%04x\n", dbg_level);
1043 }
1044
1045 static ssize_t tpacpi_driver_debug_store(struct device_driver *drv,
1046                                                 const char *buf, size_t count)
1047 {
1048         unsigned long t;
1049
1050         if (parse_strtoul(buf, 0xffff, &t))
1051                 return -EINVAL;
1052
1053         dbg_level = t;
1054
1055         return count;
1056 }
1057
1058 static DRIVER_ATTR(debug_level, S_IWUSR | S_IRUGO,
1059                 tpacpi_driver_debug_show, tpacpi_driver_debug_store);
1060
1061 /* version ------------------------------------------------------------- */
1062 static ssize_t tpacpi_driver_version_show(struct device_driver *drv,
1063                                                 char *buf)
1064 {
1065         return snprintf(buf, PAGE_SIZE, "%s v%s\n",
1066                         TPACPI_DESC, TPACPI_VERSION);
1067 }
1068
1069 static DRIVER_ATTR(version, S_IRUGO,
1070                 tpacpi_driver_version_show, NULL);
1071
1072 /* --------------------------------------------------------------------- */
1073
1074 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
1075
1076 static void tpacpi_send_radiosw_update(void);
1077
1078 /* wlsw_emulstate ------------------------------------------------------ */
1079 static ssize_t tpacpi_driver_wlsw_emulstate_show(struct device_driver *drv,
1080                                                 char *buf)
1081 {
1082         return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_wlsw_emulstate);
1083 }
1084
1085 static ssize_t tpacpi_driver_wlsw_emulstate_store(struct device_driver *drv,
1086                                                 const char *buf, size_t count)
1087 {
1088         unsigned long t;
1089
1090         if (parse_strtoul(buf, 1, &t))
1091                 return -EINVAL;
1092
1093         if (tpacpi_wlsw_emulstate != t) {
1094                 tpacpi_wlsw_emulstate = !!t;
1095                 tpacpi_send_radiosw_update();
1096         } else
1097                 tpacpi_wlsw_emulstate = !!t;
1098
1099         return count;
1100 }
1101
1102 static DRIVER_ATTR(wlsw_emulstate, S_IWUSR | S_IRUGO,
1103                 tpacpi_driver_wlsw_emulstate_show,
1104                 tpacpi_driver_wlsw_emulstate_store);
1105
1106 /* bluetooth_emulstate ------------------------------------------------- */
1107 static ssize_t tpacpi_driver_bluetooth_emulstate_show(
1108                                         struct device_driver *drv,
1109                                         char *buf)
1110 {
1111         return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_bluetooth_emulstate);
1112 }
1113
1114 static ssize_t tpacpi_driver_bluetooth_emulstate_store(
1115                                         struct device_driver *drv,
1116                                         const char *buf, size_t count)
1117 {
1118         unsigned long t;
1119
1120         if (parse_strtoul(buf, 1, &t))
1121                 return -EINVAL;
1122
1123         tpacpi_bluetooth_emulstate = !!t;
1124
1125         return count;
1126 }
1127
1128 static DRIVER_ATTR(bluetooth_emulstate, S_IWUSR | S_IRUGO,
1129                 tpacpi_driver_bluetooth_emulstate_show,
1130                 tpacpi_driver_bluetooth_emulstate_store);
1131
1132 /* wwan_emulstate ------------------------------------------------- */
1133 static ssize_t tpacpi_driver_wwan_emulstate_show(
1134                                         struct device_driver *drv,
1135                                         char *buf)
1136 {
1137         return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_wwan_emulstate);
1138 }
1139
1140 static ssize_t tpacpi_driver_wwan_emulstate_store(
1141                                         struct device_driver *drv,
1142                                         const char *buf, size_t count)
1143 {
1144         unsigned long t;
1145
1146         if (parse_strtoul(buf, 1, &t))
1147                 return -EINVAL;
1148
1149         tpacpi_wwan_emulstate = !!t;
1150
1151         return count;
1152 }
1153
1154 static DRIVER_ATTR(wwan_emulstate, S_IWUSR | S_IRUGO,
1155                 tpacpi_driver_wwan_emulstate_show,
1156                 tpacpi_driver_wwan_emulstate_store);
1157
1158 /* uwb_emulstate ------------------------------------------------- */
1159 static ssize_t tpacpi_driver_uwb_emulstate_show(
1160                                         struct device_driver *drv,
1161                                         char *buf)
1162 {
1163         return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_uwb_emulstate);
1164 }
1165
1166 static ssize_t tpacpi_driver_uwb_emulstate_store(
1167                                         struct device_driver *drv,
1168                                         const char *buf, size_t count)
1169 {
1170         unsigned long t;
1171
1172         if (parse_strtoul(buf, 1, &t))
1173                 return -EINVAL;
1174
1175         tpacpi_uwb_emulstate = !!t;
1176
1177         return count;
1178 }
1179
1180 static DRIVER_ATTR(uwb_emulstate, S_IWUSR | S_IRUGO,
1181                 tpacpi_driver_uwb_emulstate_show,
1182                 tpacpi_driver_uwb_emulstate_store);
1183 #endif
1184
1185 /* --------------------------------------------------------------------- */
1186
1187 static struct driver_attribute *tpacpi_driver_attributes[] = {
1188         &driver_attr_debug_level, &driver_attr_version,
1189         &driver_attr_interface_version,
1190 };
1191
1192 static int __init tpacpi_create_driver_attributes(struct device_driver *drv)
1193 {
1194         int i, res;
1195
1196         i = 0;
1197         res = 0;
1198         while (!res && i < ARRAY_SIZE(tpacpi_driver_attributes)) {
1199                 res = driver_create_file(drv, tpacpi_driver_attributes[i]);
1200                 i++;
1201         }
1202
1203 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
1204         if (!res && dbg_wlswemul)
1205                 res = driver_create_file(drv, &driver_attr_wlsw_emulstate);
1206         if (!res && dbg_bluetoothemul)
1207                 res = driver_create_file(drv, &driver_attr_bluetooth_emulstate);
1208         if (!res && dbg_wwanemul)
1209                 res = driver_create_file(drv, &driver_attr_wwan_emulstate);
1210         if (!res && dbg_uwbemul)
1211                 res = driver_create_file(drv, &driver_attr_uwb_emulstate);
1212 #endif
1213
1214         return res;
1215 }
1216
1217 static void tpacpi_remove_driver_attributes(struct device_driver *drv)
1218 {
1219         int i;
1220
1221         for (i = 0; i < ARRAY_SIZE(tpacpi_driver_attributes); i++)
1222                 driver_remove_file(drv, tpacpi_driver_attributes[i]);
1223
1224 #ifdef THINKPAD_ACPI_DEBUGFACILITIES
1225         driver_remove_file(drv, &driver_attr_wlsw_emulstate);
1226         driver_remove_file(drv, &driver_attr_bluetooth_emulstate);
1227         driver_remove_file(drv, &driver_attr_wwan_emulstate);
1228         driver_remove_file(drv, &driver_attr_uwb_emulstate);
1229 #endif
1230 }
1231
1232 /****************************************************************************
1233  ****************************************************************************
1234  *
1235  * Subdrivers
1236  *
1237  ****************************************************************************
1238  ****************************************************************************/
1239
1240 /*************************************************************************
1241  * thinkpad-acpi init subdriver
1242  */
1243
1244 static int __init thinkpad_acpi_driver_init(struct ibm_init_struct *iibm)
1245 {
1246         printk(TPACPI_INFO "%s v%s\n", TPACPI_DESC, TPACPI_VERSION);
1247         printk(TPACPI_INFO "%s\n", TPACPI_URL);
1248
1249         printk(TPACPI_INFO "ThinkPad BIOS %s, EC %s\n",
1250                 (thinkpad_id.bios_version_str) ?
1251                         thinkpad_id.bios_version_str : "unknown",
1252                 (thinkpad_id.ec_version_str) ?
1253                         thinkpad_id.ec_version_str : "unknown");
1254
1255         if (thinkpad_id.vendor && thinkpad_id.model_str)
1256                 printk(TPACPI_INFO "%s %s, model %s\n",
1257                         (thinkpad_id.vendor == PCI_VENDOR_ID_IBM) ?
1258                                 "IBM" : ((thinkpad_id.vendor ==
1259                                                 PCI_VENDOR_ID_LENOVO) ?
1260                                         "Lenovo" : "Unknown vendor"),
1261                         thinkpad_id.model_str,
1262                         (thinkpad_id.nummodel_str) ?
1263                                 thinkpad_id.nummodel_str : "unknown");
1264
1265         return 0;
1266 }
1267
1268 static int thinkpad_acpi_driver_read(char *p)
1269 {
1270         int len = 0;
1271
1272         len += sprintf(p + len, "driver:\t\t%s\n", TPACPI_DESC);
1273         len += sprintf(p + len, "version:\t%s\n", TPACPI_VERSION);
1274
1275         return len;
1276 }
1277
1278 static struct ibm_struct thinkpad_acpi_driver_data = {
1279         .name = "driver",
1280         .read = thinkpad_acpi_driver_read,
1281 };
1282
1283 /*************************************************************************
1284  * Hotkey subdriver
1285  */
1286
1287 enum {  /* hot key scan codes (derived from ACPI DSDT) */
1288         TP_ACPI_HOTKEYSCAN_FNF1         = 0,
1289         TP_ACPI_HOTKEYSCAN_FNF2,
1290         TP_ACPI_HOTKEYSCAN_FNF3,
1291         TP_ACPI_HOTKEYSCAN_FNF4,
1292         TP_ACPI_HOTKEYSCAN_FNF5,
1293         TP_ACPI_HOTKEYSCAN_FNF6,
1294         TP_ACPI_HOTKEYSCAN_FNF7,
1295         TP_ACPI_HOTKEYSCAN_FNF8,
1296         TP_ACPI_HOTKEYSCAN_FNF9,
1297         TP_ACPI_HOTKEYSCAN_FNF10,
1298         TP_ACPI_HOTKEYSCAN_FNF11,
1299         TP_ACPI_HOTKEYSCAN_FNF12,
1300         TP_ACPI_HOTKEYSCAN_FNBACKSPACE,
1301         TP_ACPI_HOTKEYSCAN_FNINSERT,
1302         TP_ACPI_HOTKEYSCAN_FNDELETE,
1303         TP_ACPI_HOTKEYSCAN_FNHOME,
1304         TP_ACPI_HOTKEYSCAN_FNEND,
1305         TP_ACPI_HOTKEYSCAN_FNPAGEUP,
1306         TP_ACPI_HOTKEYSCAN_FNPAGEDOWN,
1307         TP_ACPI_HOTKEYSCAN_FNSPACE,
1308         TP_ACPI_HOTKEYSCAN_VOLUMEUP,
1309         TP_ACPI_HOTKEYSCAN_VOLUMEDOWN,
1310         TP_ACPI_HOTKEYSCAN_MUTE,
1311         TP_ACPI_HOTKEYSCAN_THINKPAD,
1312 };
1313
1314 enum {  /* Keys available through NVRAM polling */
1315         TPACPI_HKEY_NVRAM_KNOWN_MASK = 0x00fb88c0U,
1316         TPACPI_HKEY_NVRAM_GOOD_MASK  = 0x00fb8000U,
1317 };
1318
1319 enum {  /* Positions of some of the keys in hotkey masks */
1320         TP_ACPI_HKEY_DISPSWTCH_MASK     = 1 << TP_ACPI_HOTKEYSCAN_FNF7,
1321         TP_ACPI_HKEY_DISPXPAND_MASK     = 1 << TP_ACPI_HOTKEYSCAN_FNF8,
1322         TP_ACPI_HKEY_HIBERNATE_MASK     = 1 << TP_ACPI_HOTKEYSCAN_FNF12,
1323         TP_ACPI_HKEY_BRGHTUP_MASK       = 1 << TP_ACPI_HOTKEYSCAN_FNHOME,
1324         TP_ACPI_HKEY_BRGHTDWN_MASK      = 1 << TP_ACPI_HOTKEYSCAN_FNEND,
1325         TP_ACPI_HKEY_THNKLGHT_MASK      = 1 << TP_ACPI_HOTKEYSCAN_FNPAGEUP,
1326         TP_ACPI_HKEY_ZOOM_MASK          = 1 << TP_ACPI_HOTKEYSCAN_FNSPACE,
1327         TP_ACPI_HKEY_VOLUP_MASK         = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEUP,
1328         TP_ACPI_HKEY_VOLDWN_MASK        = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEDOWN,
1329         TP_ACPI_HKEY_MUTE_MASK          = 1 << TP_ACPI_HOTKEYSCAN_MUTE,
1330         TP_ACPI_HKEY_THINKPAD_MASK      = 1 << TP_ACPI_HOTKEYSCAN_THINKPAD,
1331 };
1332
1333 enum {  /* NVRAM to ACPI HKEY group map */
1334         TP_NVRAM_HKEY_GROUP_HK2         = TP_ACPI_HKEY_THINKPAD_MASK |
1335                                           TP_ACPI_HKEY_ZOOM_MASK |
1336                                           TP_ACPI_HKEY_DISPSWTCH_MASK |
1337                                           TP_ACPI_HKEY_HIBERNATE_MASK,
1338         TP_NVRAM_HKEY_GROUP_BRIGHTNESS  = TP_ACPI_HKEY_BRGHTUP_MASK |
1339                                           TP_ACPI_HKEY_BRGHTDWN_MASK,
1340         TP_NVRAM_HKEY_GROUP_VOLUME      = TP_ACPI_HKEY_VOLUP_MASK |
1341                                           TP_ACPI_HKEY_VOLDWN_MASK |
1342                                           TP_ACPI_HKEY_MUTE_MASK,
1343 };
1344
1345 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1346 struct tp_nvram_state {
1347        u16 thinkpad_toggle:1;
1348        u16 zoom_toggle:1;
1349        u16 display_toggle:1;
1350        u16 thinklight_toggle:1;
1351        u16 hibernate_toggle:1;
1352        u16 displayexp_toggle:1;
1353        u16 display_state:1;
1354        u16 brightness_toggle:1;
1355        u16 volume_toggle:1;
1356        u16 mute:1;
1357
1358        u8 brightness_level;
1359        u8 volume_level;
1360 };
1361
1362 static struct task_struct *tpacpi_hotkey_task;
1363 static u32 hotkey_source_mask;          /* bit mask 0=ACPI,1=NVRAM */
1364 static int hotkey_poll_freq = 10;       /* Hz */
1365 static struct mutex hotkey_thread_mutex;
1366 static struct mutex hotkey_thread_data_mutex;
1367 static unsigned int hotkey_config_change;
1368
1369 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1370
1371 #define hotkey_source_mask 0U
1372
1373 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1374
1375 static struct mutex hotkey_mutex;
1376
1377 static enum {   /* Reasons for waking up */
1378         TP_ACPI_WAKEUP_NONE = 0,        /* None or unknown */
1379         TP_ACPI_WAKEUP_BAYEJ,           /* Bay ejection request */
1380         TP_ACPI_WAKEUP_UNDOCK,          /* Undock request */
1381 } hotkey_wakeup_reason;
1382
1383 static int hotkey_autosleep_ack;
1384
1385 static int hotkey_orig_status;
1386 static u32 hotkey_orig_mask;
1387 static u32 hotkey_all_mask;
1388 static u32 hotkey_reserved_mask;
1389 static u32 hotkey_mask;
1390
1391 static unsigned int hotkey_report_mode;
1392
1393 static u16 *hotkey_keycode_map;
1394
1395 static struct attribute_set *hotkey_dev_attributes;
1396
1397 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1398 #define HOTKEY_CONFIG_CRITICAL_START \
1399         do { \
1400                 mutex_lock(&hotkey_thread_data_mutex); \
1401                 hotkey_config_change++; \
1402         } while (0);
1403 #define HOTKEY_CONFIG_CRITICAL_END \
1404         mutex_unlock(&hotkey_thread_data_mutex);
1405 #else
1406 #define HOTKEY_CONFIG_CRITICAL_START
1407 #define HOTKEY_CONFIG_CRITICAL_END
1408 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1409
1410 /* HKEY.MHKG() return bits */
1411 #define TP_HOTKEY_TABLET_MASK (1 << 3)
1412
1413 static int hotkey_get_wlsw(int *status)
1414 {
1415 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
1416         if (dbg_wlswemul) {
1417                 *status = !!tpacpi_wlsw_emulstate;
1418                 return 0;
1419         }
1420 #endif
1421         if (!acpi_evalf(hkey_handle, status, "WLSW", "d"))
1422                 return -EIO;
1423         return 0;
1424 }
1425
1426 static int hotkey_get_tablet_mode(int *status)
1427 {
1428         int s;
1429
1430         if (!acpi_evalf(hkey_handle, &s, "MHKG", "d"))
1431                 return -EIO;
1432
1433         *status = ((s & TP_HOTKEY_TABLET_MASK) != 0);
1434         return 0;
1435 }
1436
1437 /*
1438  * Call with hotkey_mutex held
1439  */
1440 static int hotkey_mask_get(void)
1441 {
1442         u32 m = 0;
1443
1444         if (tp_features.hotkey_mask) {
1445                 if (!acpi_evalf(hkey_handle, &m, "DHKN", "d"))
1446                         return -EIO;
1447         }
1448         hotkey_mask = m | (hotkey_source_mask & hotkey_mask);
1449
1450         return 0;
1451 }
1452
1453 /*
1454  * Call with hotkey_mutex held
1455  */
1456 static int hotkey_mask_set(u32 mask)
1457 {
1458         int i;
1459         int rc = 0;
1460
1461         if (tp_features.hotkey_mask) {
1462                 if (!tp_warned.hotkey_mask_ff &&
1463                     (mask == 0xffff || mask == 0xffffff ||
1464                      mask == 0xffffffff)) {
1465                         tp_warned.hotkey_mask_ff = 1;
1466                         printk(TPACPI_NOTICE
1467                                "setting the hotkey mask to 0x%08x is likely "
1468                                "not the best way to go about it\n", mask);
1469                         printk(TPACPI_NOTICE
1470                                "please consider using the driver defaults, "
1471                                "and refer to up-to-date thinkpad-acpi "
1472                                "documentation\n");
1473                 }
1474
1475                 HOTKEY_CONFIG_CRITICAL_START
1476                 for (i = 0; i < 32; i++) {
1477                         u32 m = 1 << i;
1478                         /* enable in firmware mask only keys not in NVRAM
1479                          * mode, but enable the key in the cached hotkey_mask
1480                          * regardless of mode, or the key will end up
1481                          * disabled by hotkey_mask_get() */
1482                         if (!acpi_evalf(hkey_handle,
1483                                         NULL, "MHKM", "vdd", i + 1,
1484                                         !!((mask & ~hotkey_source_mask) & m))) {
1485                                 rc = -EIO;
1486                                 break;
1487                         } else {
1488                                 hotkey_mask = (hotkey_mask & ~m) | (mask & m);
1489                         }
1490                 }
1491                 HOTKEY_CONFIG_CRITICAL_END
1492
1493                 /* hotkey_mask_get must be called unconditionally below */
1494                 if (!hotkey_mask_get() && !rc &&
1495                     (hotkey_mask & ~hotkey_source_mask) !=
1496                      (mask & ~hotkey_source_mask)) {
1497                         printk(TPACPI_NOTICE
1498                                "requested hot key mask 0x%08x, but "
1499                                "firmware forced it to 0x%08x\n",
1500                                mask, hotkey_mask);
1501                 }
1502         } else {
1503 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1504                 HOTKEY_CONFIG_CRITICAL_START
1505                 hotkey_mask = mask & hotkey_source_mask;
1506                 HOTKEY_CONFIG_CRITICAL_END
1507                 hotkey_mask_get();
1508                 if (hotkey_mask != mask) {
1509                         printk(TPACPI_NOTICE
1510                                "requested hot key mask 0x%08x, "
1511                                "forced to 0x%08x (NVRAM poll mask is "
1512                                "0x%08x): no firmware mask support\n",
1513                                mask, hotkey_mask, hotkey_source_mask);
1514                 }
1515 #else
1516                 hotkey_mask_get();
1517                 rc = -ENXIO;
1518 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1519         }
1520
1521         return rc;
1522 }
1523
1524 static int hotkey_status_get(int *status)
1525 {
1526         if (!acpi_evalf(hkey_handle, status, "DHKC", "d"))
1527                 return -EIO;
1528
1529         return 0;
1530 }
1531
1532 static int hotkey_status_set(int status)
1533 {
1534         if (!acpi_evalf(hkey_handle, NULL, "MHKC", "vd", status))
1535                 return -EIO;
1536
1537         return 0;
1538 }
1539
1540 static void tpacpi_input_send_tabletsw(void)
1541 {
1542         int state;
1543
1544         if (tp_features.hotkey_tablet &&
1545             !hotkey_get_tablet_mode(&state)) {
1546                 mutex_lock(&tpacpi_inputdev_send_mutex);
1547
1548                 input_report_switch(tpacpi_inputdev,
1549                                     SW_TABLET_MODE, !!state);
1550                 input_sync(tpacpi_inputdev);
1551
1552                 mutex_unlock(&tpacpi_inputdev_send_mutex);
1553         }
1554 }
1555
1556 static void tpacpi_input_send_key(unsigned int scancode)
1557 {
1558         unsigned int keycode;
1559
1560         keycode = hotkey_keycode_map[scancode];
1561
1562         if (keycode != KEY_RESERVED) {
1563                 mutex_lock(&tpacpi_inputdev_send_mutex);
1564
1565                 input_report_key(tpacpi_inputdev, keycode, 1);
1566                 if (keycode == KEY_UNKNOWN)
1567                         input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN,
1568                                     scancode);
1569                 input_sync(tpacpi_inputdev);
1570
1571                 input_report_key(tpacpi_inputdev, keycode, 0);
1572                 if (keycode == KEY_UNKNOWN)
1573                         input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN,
1574                                     scancode);
1575                 input_sync(tpacpi_inputdev);
1576
1577                 mutex_unlock(&tpacpi_inputdev_send_mutex);
1578         }
1579 }
1580
1581 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1582 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver;
1583
1584 static void tpacpi_hotkey_send_key(unsigned int scancode)
1585 {
1586         tpacpi_input_send_key(scancode);
1587         if (hotkey_report_mode < 2) {
1588                 acpi_bus_generate_proc_event(ibm_hotkey_acpidriver.device,
1589                                                 0x80, 0x1001 + scancode);
1590         }
1591 }
1592
1593 static void hotkey_read_nvram(struct tp_nvram_state *n, u32 m)
1594 {
1595         u8 d;
1596
1597         if (m & TP_NVRAM_HKEY_GROUP_HK2) {
1598                 d = nvram_read_byte(TP_NVRAM_ADDR_HK2);
1599                 n->thinkpad_toggle = !!(d & TP_NVRAM_MASK_HKT_THINKPAD);
1600                 n->zoom_toggle = !!(d & TP_NVRAM_MASK_HKT_ZOOM);
1601                 n->display_toggle = !!(d & TP_NVRAM_MASK_HKT_DISPLAY);
1602                 n->hibernate_toggle = !!(d & TP_NVRAM_MASK_HKT_HIBERNATE);
1603         }
1604         if (m & TP_ACPI_HKEY_THNKLGHT_MASK) {
1605                 d = nvram_read_byte(TP_NVRAM_ADDR_THINKLIGHT);
1606                 n->thinklight_toggle = !!(d & TP_NVRAM_MASK_THINKLIGHT);
1607         }
1608         if (m & TP_ACPI_HKEY_DISPXPAND_MASK) {
1609                 d = nvram_read_byte(TP_NVRAM_ADDR_VIDEO);
1610                 n->displayexp_toggle =
1611                                 !!(d & TP_NVRAM_MASK_HKT_DISPEXPND);
1612         }
1613         if (m & TP_NVRAM_HKEY_GROUP_BRIGHTNESS) {
1614                 d = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS);
1615                 n->brightness_level = (d & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
1616                                 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
1617                 n->brightness_toggle =
1618                                 !!(d & TP_NVRAM_MASK_HKT_BRIGHTNESS);
1619         }
1620         if (m & TP_NVRAM_HKEY_GROUP_VOLUME) {
1621                 d = nvram_read_byte(TP_NVRAM_ADDR_MIXER);
1622                 n->volume_level = (d & TP_NVRAM_MASK_LEVEL_VOLUME)
1623                                 >> TP_NVRAM_POS_LEVEL_VOLUME;
1624                 n->mute = !!(d & TP_NVRAM_MASK_MUTE);
1625                 n->volume_toggle = !!(d & TP_NVRAM_MASK_HKT_VOLUME);
1626         }
1627 }
1628
1629 #define TPACPI_COMPARE_KEY(__scancode, __member) \
1630         do { \
1631                 if ((mask & (1 << __scancode)) && \
1632                     oldn->__member != newn->__member) \
1633                 tpacpi_hotkey_send_key(__scancode); \
1634         } while (0)
1635
1636 #define TPACPI_MAY_SEND_KEY(__scancode) \
1637         do { if (mask & (1 << __scancode)) \
1638                 tpacpi_hotkey_send_key(__scancode); } while (0)
1639
1640 static void hotkey_compare_and_issue_event(struct tp_nvram_state *oldn,
1641                                            struct tp_nvram_state *newn,
1642                                            u32 mask)
1643 {
1644         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_THINKPAD, thinkpad_toggle);
1645         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNSPACE, zoom_toggle);
1646         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF7, display_toggle);
1647         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF12, hibernate_toggle);
1648
1649         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNPAGEUP, thinklight_toggle);
1650
1651         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF8, displayexp_toggle);
1652
1653         /* handle volume */
1654         if (oldn->volume_toggle != newn->volume_toggle) {
1655                 if (oldn->mute != newn->mute) {
1656                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE);
1657                 }
1658                 if (oldn->volume_level > newn->volume_level) {
1659                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
1660                 } else if (oldn->volume_level < newn->volume_level) {
1661                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
1662                 } else if (oldn->mute == newn->mute) {
1663                         /* repeated key presses that didn't change state */
1664                         if (newn->mute) {
1665                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE);
1666                         } else if (newn->volume_level != 0) {
1667                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
1668                         } else {
1669                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
1670                         }
1671                 }
1672         }
1673
1674         /* handle brightness */
1675         if (oldn->brightness_toggle != newn->brightness_toggle) {
1676                 if (oldn->brightness_level < newn->brightness_level) {
1677                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
1678                 } else if (oldn->brightness_level > newn->brightness_level) {
1679                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
1680                 } else {
1681                         /* repeated key presses that didn't change state */
1682                         if (newn->brightness_level != 0) {
1683                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
1684                         } else {
1685                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
1686                         }
1687                 }
1688         }
1689 }
1690
1691 #undef TPACPI_COMPARE_KEY
1692 #undef TPACPI_MAY_SEND_KEY
1693
1694 static int hotkey_kthread(void *data)
1695 {
1696         struct tp_nvram_state s[2];
1697         u32 mask;
1698         unsigned int si, so;
1699         unsigned long t;
1700         unsigned int change_detector, must_reset;
1701
1702         mutex_lock(&hotkey_thread_mutex);
1703
1704         if (tpacpi_lifecycle == TPACPI_LIFE_EXITING)
1705                 goto exit;
1706
1707         set_freezable();
1708
1709         so = 0;
1710         si = 1;
1711         t = 0;
1712
1713         /* Initial state for compares */
1714         mutex_lock(&hotkey_thread_data_mutex);
1715         change_detector = hotkey_config_change;
1716         mask = hotkey_source_mask & hotkey_mask;
1717         mutex_unlock(&hotkey_thread_data_mutex);
1718         hotkey_read_nvram(&s[so], mask);
1719
1720         while (!kthread_should_stop() && hotkey_poll_freq) {
1721                 if (t == 0)
1722                         t = 1000/hotkey_poll_freq;
1723                 t = msleep_interruptible(t);
1724                 if (unlikely(kthread_should_stop()))
1725                         break;
1726                 must_reset = try_to_freeze();
1727                 if (t > 0 && !must_reset)
1728                         continue;
1729
1730                 mutex_lock(&hotkey_thread_data_mutex);
1731                 if (must_reset || hotkey_config_change != change_detector) {
1732                         /* forget old state on thaw or config change */
1733                         si = so;
1734                         t = 0;
1735                         change_detector = hotkey_config_change;
1736                 }
1737                 mask = hotkey_source_mask & hotkey_mask;
1738                 mutex_unlock(&hotkey_thread_data_mutex);
1739
1740                 if (likely(mask)) {
1741                         hotkey_read_nvram(&s[si], mask);
1742                         if (likely(si != so)) {
1743                                 hotkey_compare_and_issue_event(&s[so], &s[si],
1744                                                                 mask);
1745                         }
1746                 }
1747
1748                 so = si;
1749                 si ^= 1;
1750         }
1751
1752 exit:
1753         mutex_unlock(&hotkey_thread_mutex);
1754         return 0;
1755 }
1756
1757 static void hotkey_poll_stop_sync(void)
1758 {
1759         if (tpacpi_hotkey_task) {
1760                 if (frozen(tpacpi_hotkey_task) ||
1761                     freezing(tpacpi_hotkey_task))
1762                         thaw_process(tpacpi_hotkey_task);
1763
1764                 kthread_stop(tpacpi_hotkey_task);
1765                 tpacpi_hotkey_task = NULL;
1766                 mutex_lock(&hotkey_thread_mutex);
1767                 /* at this point, the thread did exit */
1768                 mutex_unlock(&hotkey_thread_mutex);
1769         }
1770 }
1771
1772 /* call with hotkey_mutex held */
1773 static void hotkey_poll_setup(int may_warn)
1774 {
1775         if ((hotkey_source_mask & hotkey_mask) != 0 &&
1776             hotkey_poll_freq > 0 &&
1777             (tpacpi_inputdev->users > 0 || hotkey_report_mode < 2)) {
1778                 if (!tpacpi_hotkey_task) {
1779                         tpacpi_hotkey_task = kthread_run(hotkey_kthread,
1780                                         NULL, TPACPI_NVRAM_KTHREAD_NAME);
1781                         if (IS_ERR(tpacpi_hotkey_task)) {
1782                                 tpacpi_hotkey_task = NULL;
1783                                 printk(TPACPI_ERR
1784                                        "could not create kernel thread "
1785                                        "for hotkey polling\n");
1786                         }
1787                 }
1788         } else {
1789                 hotkey_poll_stop_sync();
1790                 if (may_warn &&
1791                     hotkey_source_mask != 0 && hotkey_poll_freq == 0) {
1792                         printk(TPACPI_NOTICE
1793                                 "hot keys 0x%08x require polling, "
1794                                 "which is currently disabled\n",
1795                                 hotkey_source_mask);
1796                 }
1797         }
1798 }
1799
1800 static void hotkey_poll_setup_safe(int may_warn)
1801 {
1802         mutex_lock(&hotkey_mutex);
1803         hotkey_poll_setup(may_warn);
1804         mutex_unlock(&hotkey_mutex);
1805 }
1806
1807 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1808
1809 static void hotkey_poll_setup_safe(int __unused)
1810 {
1811 }
1812
1813 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1814
1815 static int hotkey_inputdev_open(struct input_dev *dev)
1816 {
1817         switch (tpacpi_lifecycle) {
1818         case TPACPI_LIFE_INIT:
1819                 /*
1820                  * hotkey_init will call hotkey_poll_setup_safe
1821                  * at the appropriate moment
1822                  */
1823                 return 0;
1824         case TPACPI_LIFE_EXITING:
1825                 return -EBUSY;
1826         case TPACPI_LIFE_RUNNING:
1827                 hotkey_poll_setup_safe(0);
1828                 return 0;
1829         }
1830
1831         /* Should only happen if tpacpi_lifecycle is corrupt */
1832         BUG();
1833         return -EBUSY;
1834 }
1835
1836 static void hotkey_inputdev_close(struct input_dev *dev)
1837 {
1838         /* disable hotkey polling when possible */
1839         if (tpacpi_lifecycle == TPACPI_LIFE_RUNNING)
1840                 hotkey_poll_setup_safe(0);
1841 }
1842
1843 /* sysfs hotkey enable ------------------------------------------------- */
1844 static ssize_t hotkey_enable_show(struct device *dev,
1845                            struct device_attribute *attr,
1846                            char *buf)
1847 {
1848         int res, status;
1849
1850         res = hotkey_status_get(&status);
1851         if (res)
1852                 return res;
1853
1854         return snprintf(buf, PAGE_SIZE, "%d\n", status);
1855 }
1856
1857 static ssize_t hotkey_enable_store(struct device *dev,
1858                             struct device_attribute *attr,
1859                             const char *buf, size_t count)
1860 {
1861         unsigned long t;
1862         int res;
1863
1864         if (parse_strtoul(buf, 1, &t))
1865                 return -EINVAL;
1866
1867         res = hotkey_status_set(t);
1868
1869         return (res) ? res : count;
1870 }
1871
1872 static struct device_attribute dev_attr_hotkey_enable =
1873         __ATTR(hotkey_enable, S_IWUSR | S_IRUGO,
1874                 hotkey_enable_show, hotkey_enable_store);
1875
1876 /* sysfs hotkey mask --------------------------------------------------- */
1877 static ssize_t hotkey_mask_show(struct device *dev,
1878                            struct device_attribute *attr,
1879                            char *buf)
1880 {
1881         int res;
1882
1883         if (mutex_lock_killable(&hotkey_mutex))
1884                 return -ERESTARTSYS;
1885         res = hotkey_mask_get();
1886         mutex_unlock(&hotkey_mutex);
1887
1888         return (res)?
1889                 res : snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_mask);
1890 }
1891
1892 static ssize_t hotkey_mask_store(struct device *dev,
1893                             struct device_attribute *attr,
1894                             const char *buf, size_t count)
1895 {
1896         unsigned long t;
1897         int res;
1898
1899         if (parse_strtoul(buf, 0xffffffffUL, &t))
1900                 return -EINVAL;
1901
1902         if (mutex_lock_killable(&hotkey_mutex))
1903                 return -ERESTARTSYS;
1904
1905         res = hotkey_mask_set(t);
1906
1907 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1908         hotkey_poll_setup(1);
1909 #endif
1910
1911         mutex_unlock(&hotkey_mutex);
1912
1913         return (res) ? res : count;
1914 }
1915
1916 static struct device_attribute dev_attr_hotkey_mask =
1917         __ATTR(hotkey_mask, S_IWUSR | S_IRUGO,
1918                 hotkey_mask_show, hotkey_mask_store);
1919
1920 /* sysfs hotkey bios_enabled ------------------------------------------- */
1921 static ssize_t hotkey_bios_enabled_show(struct device *dev,
1922                            struct device_attribute *attr,
1923                            char *buf)
1924 {
1925         return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_orig_status);
1926 }
1927
1928 static struct device_attribute dev_attr_hotkey_bios_enabled =
1929         __ATTR(hotkey_bios_enabled, S_IRUGO, hotkey_bios_enabled_show, NULL);
1930
1931 /* sysfs hotkey bios_mask ---------------------------------------------- */
1932 static ssize_t hotkey_bios_mask_show(struct device *dev,
1933                            struct device_attribute *attr,
1934                            char *buf)
1935 {
1936         return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_orig_mask);
1937 }
1938
1939 static struct device_attribute dev_attr_hotkey_bios_mask =
1940         __ATTR(hotkey_bios_mask, S_IRUGO, hotkey_bios_mask_show, NULL);
1941
1942 /* sysfs hotkey all_mask ----------------------------------------------- */
1943 static ssize_t hotkey_all_mask_show(struct device *dev,
1944                            struct device_attribute *attr,
1945                            char *buf)
1946 {
1947         return snprintf(buf, PAGE_SIZE, "0x%08x\n",
1948                                 hotkey_all_mask | hotkey_source_mask);
1949 }
1950
1951 static struct device_attribute dev_attr_hotkey_all_mask =
1952         __ATTR(hotkey_all_mask, S_IRUGO, hotkey_all_mask_show, NULL);
1953
1954 /* sysfs hotkey recommended_mask --------------------------------------- */
1955 static ssize_t hotkey_recommended_mask_show(struct device *dev,
1956                                             struct device_attribute *attr,
1957                                             char *buf)
1958 {
1959         return snprintf(buf, PAGE_SIZE, "0x%08x\n",
1960                         (hotkey_all_mask | hotkey_source_mask)
1961                         & ~hotkey_reserved_mask);
1962 }
1963
1964 static struct device_attribute dev_attr_hotkey_recommended_mask =
1965         __ATTR(hotkey_recommended_mask, S_IRUGO,
1966                 hotkey_recommended_mask_show, NULL);
1967
1968 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1969
1970 /* sysfs hotkey hotkey_source_mask ------------------------------------- */
1971 static ssize_t hotkey_source_mask_show(struct device *dev,
1972                            struct device_attribute *attr,
1973                            char *buf)
1974 {
1975         return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_source_mask);
1976 }
1977
1978 static ssize_t hotkey_source_mask_store(struct device *dev,
1979                             struct device_attribute *attr,
1980                             const char *buf, size_t count)
1981 {
1982         unsigned long t;
1983
1984         if (parse_strtoul(buf, 0xffffffffUL, &t) ||
1985                 ((t & ~TPACPI_HKEY_NVRAM_KNOWN_MASK) != 0))
1986                 return -EINVAL;
1987
1988         if (mutex_lock_killable(&hotkey_mutex))
1989                 return -ERESTARTSYS;
1990
1991         HOTKEY_CONFIG_CRITICAL_START
1992         hotkey_source_mask = t;
1993         HOTKEY_CONFIG_CRITICAL_END
1994
1995         hotkey_poll_setup(1);
1996
1997         mutex_unlock(&hotkey_mutex);
1998
1999         return count;
2000 }
2001
2002 static struct device_attribute dev_attr_hotkey_source_mask =
2003         __ATTR(hotkey_source_mask, S_IWUSR | S_IRUGO,
2004                 hotkey_source_mask_show, hotkey_source_mask_store);
2005
2006 /* sysfs hotkey hotkey_poll_freq --------------------------------------- */
2007 static ssize_t hotkey_poll_freq_show(struct device *dev,
2008                            struct device_attribute *attr,
2009                            char *buf)
2010 {
2011         return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_poll_freq);
2012 }
2013
2014 static ssize_t hotkey_poll_freq_store(struct device *dev,
2015                             struct device_attribute *attr,
2016                             const char *buf, size_t count)
2017 {
2018         unsigned long t;
2019
2020         if (parse_strtoul(buf, 25, &t))
2021                 return -EINVAL;
2022
2023         if (mutex_lock_killable(&hotkey_mutex))
2024                 return -ERESTARTSYS;
2025
2026         hotkey_poll_freq = t;
2027
2028         hotkey_poll_setup(1);
2029         mutex_unlock(&hotkey_mutex);
2030
2031         return count;
2032 }
2033
2034 static struct device_attribute dev_attr_hotkey_poll_freq =
2035         __ATTR(hotkey_poll_freq, S_IWUSR | S_IRUGO,
2036                 hotkey_poll_freq_show, hotkey_poll_freq_store);
2037
2038 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2039
2040 /* sysfs hotkey radio_sw (pollable) ------------------------------------ */
2041 static ssize_t hotkey_radio_sw_show(struct device *dev,
2042                            struct device_attribute *attr,
2043                            char *buf)
2044 {
2045         int res, s;
2046         res = hotkey_get_wlsw(&s);
2047         if (res < 0)
2048                 return res;
2049
2050         return snprintf(buf, PAGE_SIZE, "%d\n", !!s);
2051 }
2052
2053 static struct device_attribute dev_attr_hotkey_radio_sw =
2054         __ATTR(hotkey_radio_sw, S_IRUGO, hotkey_radio_sw_show, NULL);
2055
2056 static void hotkey_radio_sw_notify_change(void)
2057 {
2058         if (tp_features.hotkey_wlsw)
2059                 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2060                              "hotkey_radio_sw");
2061 }
2062
2063 /* sysfs hotkey tablet mode (pollable) --------------------------------- */
2064 static ssize_t hotkey_tablet_mode_show(struct device *dev,
2065                            struct device_attribute *attr,
2066                            char *buf)
2067 {
2068         int res, s;
2069         res = hotkey_get_tablet_mode(&s);
2070         if (res < 0)
2071                 return res;
2072
2073         return snprintf(buf, PAGE_SIZE, "%d\n", !!s);
2074 }
2075
2076 static struct device_attribute dev_attr_hotkey_tablet_mode =
2077         __ATTR(hotkey_tablet_mode, S_IRUGO, hotkey_tablet_mode_show, NULL);
2078
2079 static void hotkey_tablet_mode_notify_change(void)
2080 {
2081         if (tp_features.hotkey_tablet)
2082                 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2083                              "hotkey_tablet_mode");
2084 }
2085
2086 /* sysfs hotkey report_mode -------------------------------------------- */
2087 static ssize_t hotkey_report_mode_show(struct device *dev,
2088                            struct device_attribute *attr,
2089                            char *buf)
2090 {
2091         return snprintf(buf, PAGE_SIZE, "%d\n",
2092                 (hotkey_report_mode != 0) ? hotkey_report_mode : 1);
2093 }
2094
2095 static struct device_attribute dev_attr_hotkey_report_mode =
2096         __ATTR(hotkey_report_mode, S_IRUGO, hotkey_report_mode_show, NULL);
2097
2098 /* sysfs wakeup reason (pollable) -------------------------------------- */
2099 static ssize_t hotkey_wakeup_reason_show(struct device *dev,
2100                            struct device_attribute *attr,
2101                            char *buf)
2102 {
2103         return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_wakeup_reason);
2104 }
2105
2106 static struct device_attribute dev_attr_hotkey_wakeup_reason =
2107         __ATTR(wakeup_reason, S_IRUGO, hotkey_wakeup_reason_show, NULL);
2108
2109 static void hotkey_wakeup_reason_notify_change(void)
2110 {
2111         if (tp_features.hotkey_mask)
2112                 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2113                              "wakeup_reason");
2114 }
2115
2116 /* sysfs wakeup hotunplug_complete (pollable) -------------------------- */
2117 static ssize_t hotkey_wakeup_hotunplug_complete_show(struct device *dev,
2118                            struct device_attribute *attr,
2119                            char *buf)
2120 {
2121         return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_autosleep_ack);
2122 }
2123
2124 static struct device_attribute dev_attr_hotkey_wakeup_hotunplug_complete =
2125         __ATTR(wakeup_hotunplug_complete, S_IRUGO,
2126                hotkey_wakeup_hotunplug_complete_show, NULL);
2127
2128 static void hotkey_wakeup_hotunplug_complete_notify_change(void)
2129 {
2130         if (tp_features.hotkey_mask)
2131                 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2132                              "wakeup_hotunplug_complete");
2133 }
2134
2135 /* --------------------------------------------------------------------- */
2136
2137 static struct attribute *hotkey_attributes[] __initdata = {
2138         &dev_attr_hotkey_enable.attr,
2139         &dev_attr_hotkey_bios_enabled.attr,
2140         &dev_attr_hotkey_report_mode.attr,
2141 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2142         &dev_attr_hotkey_mask.attr,
2143         &dev_attr_hotkey_all_mask.attr,
2144         &dev_attr_hotkey_recommended_mask.attr,
2145         &dev_attr_hotkey_source_mask.attr,
2146         &dev_attr_hotkey_poll_freq.attr,
2147 #endif
2148 };
2149
2150 static struct attribute *hotkey_mask_attributes[] __initdata = {
2151         &dev_attr_hotkey_bios_mask.attr,
2152 #ifndef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2153         &dev_attr_hotkey_mask.attr,
2154         &dev_attr_hotkey_all_mask.attr,
2155         &dev_attr_hotkey_recommended_mask.attr,
2156 #endif
2157         &dev_attr_hotkey_wakeup_reason.attr,
2158         &dev_attr_hotkey_wakeup_hotunplug_complete.attr,
2159 };
2160
2161 static void bluetooth_update_rfk(void);
2162 static void wan_update_rfk(void);
2163 static void uwb_update_rfk(void);
2164 static void tpacpi_send_radiosw_update(void)
2165 {
2166         int wlsw;
2167
2168         /* Sync these BEFORE sending any rfkill events */
2169         if (tp_features.bluetooth)
2170                 bluetooth_update_rfk();
2171         if (tp_features.wan)
2172                 wan_update_rfk();
2173         if (tp_features.uwb)
2174                 uwb_update_rfk();
2175
2176         if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&wlsw)) {
2177                 mutex_lock(&tpacpi_inputdev_send_mutex);
2178
2179                 input_report_switch(tpacpi_inputdev,
2180                                     SW_RFKILL_ALL, !!wlsw);
2181                 input_sync(tpacpi_inputdev);
2182
2183                 mutex_unlock(&tpacpi_inputdev_send_mutex);
2184         }
2185         hotkey_radio_sw_notify_change();
2186 }
2187
2188 static void hotkey_exit(void)
2189 {
2190 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2191         hotkey_poll_stop_sync();
2192 #endif
2193
2194         if (hotkey_dev_attributes)
2195                 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
2196
2197         kfree(hotkey_keycode_map);
2198
2199         if (tp_features.hotkey) {
2200                 dbg_printk(TPACPI_DBG_EXIT,
2201                            "restoring original hot key mask\n");
2202                 /* no short-circuit boolean operator below! */
2203                 if ((hotkey_mask_set(hotkey_orig_mask) |
2204                      hotkey_status_set(hotkey_orig_status)) != 0)
2205                         printk(TPACPI_ERR
2206                                "failed to restore hot key mask "
2207                                "to BIOS defaults\n");
2208         }
2209 }
2210
2211 static int __init hotkey_init(struct ibm_init_struct *iibm)
2212 {
2213         /* Requirements for changing the default keymaps:
2214          *
2215          * 1. Many of the keys are mapped to KEY_RESERVED for very
2216          *    good reasons.  Do not change them unless you have deep
2217          *    knowledge on the IBM and Lenovo ThinkPad firmware for
2218          *    the various ThinkPad models.  The driver behaves
2219          *    differently for KEY_RESERVED: such keys have their
2220          *    hot key mask *unset* in mask_recommended, and also
2221          *    in the initial hot key mask programmed into the
2222          *    firmware at driver load time, which means the firm-
2223          *    ware may react very differently if you change them to
2224          *    something else;
2225          *
2226          * 2. You must be subscribed to the linux-thinkpad and
2227          *    ibm-acpi-devel mailing lists, and you should read the
2228          *    list archives since 2007 if you want to change the
2229          *    keymaps.  This requirement exists so that you will
2230          *    know the past history of problems with the thinkpad-
2231          *    acpi driver keymaps, and also that you will be
2232          *    listening to any bug reports;
2233          *
2234          * 3. Do not send thinkpad-acpi specific patches directly to
2235          *    for merging, *ever*.  Send them to the linux-acpi
2236          *    mailinglist for comments.  Merging is to be done only
2237          *    through acpi-test and the ACPI maintainer.
2238          *
2239          * If the above is too much to ask, don't change the keymap.
2240          * Ask the thinkpad-acpi maintainer to do it, instead.
2241          */
2242         static u16 ibm_keycode_map[] __initdata = {
2243                 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
2244                 KEY_FN_F1,      KEY_FN_F2,      KEY_COFFEE,     KEY_SLEEP,
2245                 KEY_WLAN,       KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
2246                 KEY_FN_F9,      KEY_FN_F10,     KEY_FN_F11,     KEY_SUSPEND,
2247
2248                 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
2249                 KEY_UNKNOWN,    /* 0x0C: FN+BACKSPACE */
2250                 KEY_UNKNOWN,    /* 0x0D: FN+INSERT */
2251                 KEY_UNKNOWN,    /* 0x0E: FN+DELETE */
2252
2253                 /* brightness: firmware always reacts to them, unless
2254                  * X.org did some tricks in the radeon BIOS scratch
2255                  * registers of *some* models */
2256                 KEY_RESERVED,   /* 0x0F: FN+HOME (brightness up) */
2257                 KEY_RESERVED,   /* 0x10: FN+END (brightness down) */
2258
2259                 /* Thinklight: firmware always react to it */
2260                 KEY_RESERVED,   /* 0x11: FN+PGUP (thinklight toggle) */
2261
2262                 KEY_UNKNOWN,    /* 0x12: FN+PGDOWN */
2263                 KEY_ZOOM,       /* 0x13: FN+SPACE (zoom) */
2264
2265                 /* Volume: firmware always react to it and reprograms
2266                  * the built-in *extra* mixer.  Never map it to control
2267                  * another mixer by default. */
2268                 KEY_RESERVED,   /* 0x14: VOLUME UP */
2269                 KEY_RESERVED,   /* 0x15: VOLUME DOWN */
2270                 KEY_RESERVED,   /* 0x16: MUTE */
2271
2272                 KEY_VENDOR,     /* 0x17: Thinkpad/AccessIBM/Lenovo */
2273
2274                 /* (assignments unknown, please report if found) */
2275                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
2276                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
2277         };
2278         static u16 lenovo_keycode_map[] __initdata = {
2279                 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
2280                 KEY_FN_F1,      KEY_COFFEE,     KEY_BATTERY,    KEY_SLEEP,
2281                 KEY_WLAN,       KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
2282                 KEY_FN_F9,      KEY_FN_F10,     KEY_FN_F11,     KEY_SUSPEND,
2283
2284                 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
2285                 KEY_UNKNOWN,    /* 0x0C: FN+BACKSPACE */
2286                 KEY_UNKNOWN,    /* 0x0D: FN+INSERT */
2287                 KEY_UNKNOWN,    /* 0x0E: FN+DELETE */
2288
2289                 /* These either have to go through ACPI video, or
2290                  * act like in the IBM ThinkPads, so don't ever
2291                  * enable them by default */
2292                 KEY_RESERVED,   /* 0x0F: FN+HOME (brightness up) */
2293                 KEY_RESERVED,   /* 0x10: FN+END (brightness down) */
2294
2295                 KEY_RESERVED,   /* 0x11: FN+PGUP (thinklight toggle) */
2296
2297                 KEY_UNKNOWN,    /* 0x12: FN+PGDOWN */
2298                 KEY_ZOOM,       /* 0x13: FN+SPACE (zoom) */
2299
2300                 /* Volume: z60/z61, T60 (BIOS version?): firmware always
2301                  * react to it and reprograms the built-in *extra* mixer.
2302                  * Never map it to control another mixer by default.
2303                  *
2304                  * T60?, T61, R60?, R61: firmware and EC tries to send
2305                  * these over the regular keyboard, so these are no-ops,
2306                  * but there are still weird bugs re. MUTE, so do not
2307                  * change unless you get test reports from all Lenovo
2308                  * models.  May cause the BIOS to interfere with the
2309                  * HDA mixer.
2310                  */
2311                 KEY_RESERVED,   /* 0x14: VOLUME UP */
2312                 KEY_RESERVED,   /* 0x15: VOLUME DOWN */
2313                 KEY_RESERVED,   /* 0x16: MUTE */
2314
2315                 KEY_VENDOR,     /* 0x17: Thinkpad/AccessIBM/Lenovo */
2316
2317                 /* (assignments unknown, please report if found) */
2318                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
2319                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
2320         };
2321
2322 #define TPACPI_HOTKEY_MAP_LEN           ARRAY_SIZE(ibm_keycode_map)
2323 #define TPACPI_HOTKEY_MAP_SIZE          sizeof(ibm_keycode_map)
2324 #define TPACPI_HOTKEY_MAP_TYPESIZE      sizeof(ibm_keycode_map[0])
2325
2326         int res, i;
2327         int status;
2328         int hkeyv;
2329
2330         vdbg_printk(TPACPI_DBG_INIT, "initializing hotkey subdriver\n");
2331
2332         BUG_ON(!tpacpi_inputdev);
2333         BUG_ON(tpacpi_inputdev->open != NULL ||
2334                tpacpi_inputdev->close != NULL);
2335
2336         TPACPI_ACPIHANDLE_INIT(hkey);
2337         mutex_init(&hotkey_mutex);
2338
2339 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2340         mutex_init(&hotkey_thread_mutex);
2341         mutex_init(&hotkey_thread_data_mutex);
2342 #endif
2343
2344         /* hotkey not supported on 570 */
2345         tp_features.hotkey = hkey_handle != NULL;
2346
2347         vdbg_printk(TPACPI_DBG_INIT, "hotkeys are %s\n",
2348                 str_supported(tp_features.hotkey));
2349
2350         if (!tp_features.hotkey)
2351                 return 1;
2352
2353         tpacpi_disable_brightness_delay();
2354
2355         hotkey_dev_attributes = create_attr_set(13, NULL);
2356         if (!hotkey_dev_attributes)
2357                 return -ENOMEM;
2358         res = add_many_to_attr_set(hotkey_dev_attributes,
2359                         hotkey_attributes,
2360                         ARRAY_SIZE(hotkey_attributes));
2361         if (res)
2362                 goto err_exit;
2363
2364         /* mask not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
2365            A30, R30, R31, T20-22, X20-21, X22-24.  Detected by checking
2366            for HKEY interface version 0x100 */
2367         if (acpi_evalf(hkey_handle, &hkeyv, "MHKV", "qd")) {
2368                 if ((hkeyv >> 8) != 1) {
2369                         printk(TPACPI_ERR "unknown version of the "
2370                                "HKEY interface: 0x%x\n", hkeyv);
2371                         printk(TPACPI_ERR "please report this to %s\n",
2372                                TPACPI_MAIL);
2373                 } else {
2374                         /*
2375                          * MHKV 0x100 in A31, R40, R40e,
2376                          * T4x, X31, and later
2377                          */
2378                         tp_features.hotkey_mask = 1;
2379                 }
2380         }
2381
2382         vdbg_printk(TPACPI_DBG_INIT, "hotkey masks are %s\n",
2383                 str_supported(tp_features.hotkey_mask));
2384
2385         if (tp_features.hotkey_mask) {
2386                 if (!acpi_evalf(hkey_handle, &hotkey_all_mask,
2387                                 "MHKA", "qd")) {
2388                         printk(TPACPI_ERR
2389                                "missing MHKA handler, "
2390                                "please report this to %s\n",
2391                                TPACPI_MAIL);
2392                         /* FN+F12, FN+F4, FN+F3 */
2393                         hotkey_all_mask = 0x080cU;
2394                 }
2395         }
2396
2397         /* hotkey_source_mask *must* be zero for
2398          * the first hotkey_mask_get */
2399         res = hotkey_status_get(&hotkey_orig_status);
2400         if (res)
2401                 goto err_exit;
2402
2403         if (tp_features.hotkey_mask) {
2404                 res = hotkey_mask_get();
2405                 if (res)
2406                         goto err_exit;
2407
2408                 hotkey_orig_mask = hotkey_mask;
2409                 res = add_many_to_attr_set(
2410                                 hotkey_dev_attributes,
2411                                 hotkey_mask_attributes,
2412                                 ARRAY_SIZE(hotkey_mask_attributes));
2413                 if (res)
2414                         goto err_exit;
2415         }
2416
2417 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2418         if (tp_features.hotkey_mask) {
2419                 hotkey_source_mask = TPACPI_HKEY_NVRAM_GOOD_MASK
2420                                         & ~hotkey_all_mask;
2421         } else {
2422                 hotkey_source_mask = TPACPI_HKEY_NVRAM_GOOD_MASK;
2423         }
2424
2425         vdbg_printk(TPACPI_DBG_INIT,
2426                     "hotkey source mask 0x%08x, polling freq %d\n",
2427                     hotkey_source_mask, hotkey_poll_freq);
2428 #endif
2429
2430 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
2431         if (dbg_wlswemul) {
2432                 tp_features.hotkey_wlsw = 1;
2433                 printk(TPACPI_INFO
2434                         "radio switch emulation enabled\n");
2435         } else
2436 #endif
2437         /* Not all thinkpads have a hardware radio switch */
2438         if (acpi_evalf(hkey_handle, &status, "WLSW", "qd")) {
2439                 tp_features.hotkey_wlsw = 1;
2440                 printk(TPACPI_INFO
2441                         "radio switch found; radios are %s\n",
2442                         enabled(status, 0));
2443         }
2444         if (tp_features.hotkey_wlsw)
2445                 res = add_to_attr_set(hotkey_dev_attributes,
2446                                 &dev_attr_hotkey_radio_sw.attr);
2447
2448         /* For X41t, X60t, X61t Tablets... */
2449         if (!res && acpi_evalf(hkey_handle, &status, "MHKG", "qd")) {
2450                 tp_features.hotkey_tablet = 1;
2451                 printk(TPACPI_INFO
2452                         "possible tablet mode switch found; "
2453                         "ThinkPad in %s mode\n",
2454                         (status & TP_HOTKEY_TABLET_MASK)?
2455                                 "tablet" : "laptop");
2456                 res = add_to_attr_set(hotkey_dev_attributes,
2457                                 &dev_attr_hotkey_tablet_mode.attr);
2458         }
2459
2460         if (!res)
2461                 res = register_attr_set_with_sysfs(
2462                                 hotkey_dev_attributes,
2463                                 &tpacpi_pdev->dev.kobj);
2464         if (res)
2465                 goto err_exit;
2466
2467         /* Set up key map */
2468
2469         hotkey_keycode_map = kmalloc(TPACPI_HOTKEY_MAP_SIZE,
2470                                         GFP_KERNEL);
2471         if (!hotkey_keycode_map) {
2472                 printk(TPACPI_ERR
2473                         "failed to allocate memory for key map\n");
2474                 res = -ENOMEM;
2475                 goto err_exit;
2476         }
2477
2478         if (thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO) {
2479                 dbg_printk(TPACPI_DBG_INIT,
2480                            "using Lenovo default hot key map\n");
2481                 memcpy(hotkey_keycode_map, &lenovo_keycode_map,
2482                         TPACPI_HOTKEY_MAP_SIZE);
2483         } else {
2484                 dbg_printk(TPACPI_DBG_INIT,
2485                            "using IBM default hot key map\n");
2486                 memcpy(hotkey_keycode_map, &ibm_keycode_map,
2487                         TPACPI_HOTKEY_MAP_SIZE);
2488         }
2489
2490         set_bit(EV_KEY, tpacpi_inputdev->evbit);
2491         set_bit(EV_MSC, tpacpi_inputdev->evbit);
2492         set_bit(MSC_SCAN, tpacpi_inputdev->mscbit);
2493         tpacpi_inputdev->keycodesize = TPACPI_HOTKEY_MAP_TYPESIZE;
2494         tpacpi_inputdev->keycodemax = TPACPI_HOTKEY_MAP_LEN;
2495         tpacpi_inputdev->keycode = hotkey_keycode_map;
2496         for (i = 0; i < TPACPI_HOTKEY_MAP_LEN; i++) {
2497                 if (hotkey_keycode_map[i] != KEY_RESERVED) {
2498                         set_bit(hotkey_keycode_map[i],
2499                                 tpacpi_inputdev->keybit);
2500                 } else {
2501                         if (i < sizeof(hotkey_reserved_mask)*8)
2502                                 hotkey_reserved_mask |= 1 << i;
2503                 }
2504         }
2505
2506         if (tp_features.hotkey_wlsw) {
2507                 set_bit(EV_SW, tpacpi_inputdev->evbit);
2508                 set_bit(SW_RFKILL_ALL, tpacpi_inputdev->swbit);
2509         }
2510         if (tp_features.hotkey_tablet) {
2511                 set_bit(EV_SW, tpacpi_inputdev->evbit);
2512                 set_bit(SW_TABLET_MODE, tpacpi_inputdev->swbit);
2513         }
2514
2515         /* Do not issue duplicate brightness change events to
2516          * userspace */
2517         if (!tp_features.bright_acpimode)
2518                 /* update bright_acpimode... */
2519                 tpacpi_check_std_acpi_brightness_support();
2520
2521         if (tp_features.bright_acpimode) {
2522                 printk(TPACPI_INFO
2523                        "This ThinkPad has standard ACPI backlight "
2524                        "brightness control, supported by the ACPI "
2525                        "video driver\n");
2526                 printk(TPACPI_NOTICE
2527                        "Disabling thinkpad-acpi brightness events "
2528                        "by default...\n");
2529
2530                 /* The hotkey_reserved_mask change below is not
2531                  * necessary while the keys are at KEY_RESERVED in the
2532                  * default map, but better safe than sorry, leave it
2533                  * here as a marker of what we have to do, especially
2534                  * when we finally become able to set this at runtime
2535                  * on response to X.org requests */
2536                 hotkey_reserved_mask |=
2537                         (1 << TP_ACPI_HOTKEYSCAN_FNHOME)
2538                         | (1 << TP_ACPI_HOTKEYSCAN_FNEND);
2539         }
2540
2541         dbg_printk(TPACPI_DBG_INIT, "enabling hot key handling\n");
2542         res = hotkey_status_set(1);
2543         if (res) {
2544                 hotkey_exit();
2545                 return res;
2546         }
2547         res = hotkey_mask_set(((hotkey_all_mask | hotkey_source_mask)
2548                                 & ~hotkey_reserved_mask)
2549                                 | hotkey_orig_mask);
2550         if (res < 0 && res != -ENXIO) {
2551                 hotkey_exit();
2552                 return res;
2553         }
2554
2555         dbg_printk(TPACPI_DBG_INIT,
2556                         "legacy hot key reporting over procfs %s\n",
2557                         (hotkey_report_mode < 2) ?
2558                                 "enabled" : "disabled");
2559
2560         tpacpi_inputdev->open = &hotkey_inputdev_open;
2561         tpacpi_inputdev->close = &hotkey_inputdev_close;
2562
2563         hotkey_poll_setup_safe(1);
2564         tpacpi_send_radiosw_update();
2565         tpacpi_input_send_tabletsw();
2566
2567         return 0;
2568
2569 err_exit:
2570         delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
2571         hotkey_dev_attributes = NULL;
2572
2573         return (res < 0)? res : 1;
2574 }
2575
2576 static bool hotkey_notify_hotkey(const u32 hkey,
2577                                  bool *send_acpi_ev,
2578                                  bool *ignore_acpi_ev)
2579 {
2580         /* 0x1000-0x1FFF: key presses */
2581         unsigned int scancode = hkey & 0xfff;
2582         *send_acpi_ev = true;
2583         *ignore_acpi_ev = false;
2584
2585         if (scancode > 0 && scancode < 0x21) {
2586                 scancode--;
2587                 if (!(hotkey_source_mask & (1 << scancode))) {
2588                         tpacpi_input_send_key(scancode);
2589                         *send_acpi_ev = false;
2590                 } else {
2591                         *ignore_acpi_ev = true;
2592                 }
2593                 return true;
2594         }
2595         return false;
2596 }
2597
2598 static bool hotkey_notify_wakeup(const u32 hkey,
2599                                  bool *send_acpi_ev,
2600                                  bool *ignore_acpi_ev)
2601 {
2602         /* 0x2000-0x2FFF: Wakeup reason */
2603         *send_acpi_ev = true;
2604         *ignore_acpi_ev = false;
2605
2606         switch (hkey) {
2607         case 0x2304: /* suspend, undock */
2608         case 0x2404: /* hibernation, undock */
2609                 hotkey_wakeup_reason = TP_ACPI_WAKEUP_UNDOCK;
2610                 *ignore_acpi_ev = true;
2611                 break;
2612
2613         case 0x2305: /* suspend, bay eject */
2614         case 0x2405: /* hibernation, bay eject */
2615                 hotkey_wakeup_reason = TP_ACPI_WAKEUP_BAYEJ;
2616                 *ignore_acpi_ev = true;
2617                 break;
2618
2619         case 0x2313: /* Battery on critical low level (S3) */
2620         case 0x2413: /* Battery on critical low level (S4) */
2621                 printk(TPACPI_ALERT
2622                         "EMERGENCY WAKEUP: battery almost empty\n");
2623                 /* how to auto-heal: */
2624                 /* 2313: woke up from S3, go to S4/S5 */
2625                 /* 2413: woke up from S4, go to S5 */
2626                 break;
2627
2628         default:
2629                 return false;
2630         }
2631
2632         if (hotkey_wakeup_reason != TP_ACPI_WAKEUP_NONE) {
2633                 printk(TPACPI_INFO
2634                        "woke up due to a hot-unplug "
2635                        "request...\n");
2636                 hotkey_wakeup_reason_notify_change();
2637         }
2638         return true;
2639 }
2640
2641 static bool hotkey_notify_usrevent(const u32 hkey,
2642                                  bool *send_acpi_ev,
2643                                  bool *ignore_acpi_ev)
2644 {
2645         /* 0x5000-0x5FFF: human interface helpers */
2646         *send_acpi_ev = true;
2647         *ignore_acpi_ev = false;
2648
2649         switch (hkey) {
2650         case 0x5010: /* Lenovo new BIOS: brightness changed */
2651         case 0x500b: /* X61t: tablet pen inserted into bay */
2652         case 0x500c: /* X61t: tablet pen removed from bay */
2653                 return true;
2654
2655         case 0x5009: /* X41t-X61t: swivel up (tablet mode) */
2656         case 0x500a: /* X41t-X61t: swivel down (normal mode) */
2657                 tpacpi_input_send_tabletsw();
2658                 hotkey_tablet_mode_notify_change();
2659                 *send_acpi_ev = false;
2660                 return true;
2661
2662         case 0x5001:
2663         case 0x5002:
2664                 /* LID switch events.  Do not propagate */
2665                 *ignore_acpi_ev = true;
2666                 return true;
2667
2668         default:
2669                 return false;
2670         }
2671 }
2672
2673 static bool hotkey_notify_thermal(const u32 hkey,
2674                                  bool *send_acpi_ev,
2675                                  bool *ignore_acpi_ev)
2676 {
2677         /* 0x6000-0x6FFF: thermal alarms */
2678         *send_acpi_ev = true;
2679         *ignore_acpi_ev = false;
2680
2681         switch (hkey) {
2682         case 0x6011:
2683                 printk(TPACPI_CRIT
2684                         "THERMAL ALARM: battery is too hot!\n");
2685                 /* recommended action: warn user through gui */
2686                 return true;
2687         case 0x6012:
2688                 printk(TPACPI_ALERT
2689                         "THERMAL EMERGENCY: battery is extremely hot!\n");
2690                 /* recommended action: immediate sleep/hibernate */
2691                 return true;
2692         case 0x6021:
2693                 printk(TPACPI_CRIT
2694                         "THERMAL ALARM: "
2695                         "a sensor reports something is too hot!\n");
2696                 /* recommended action: warn user through gui, that */
2697                 /* some internal component is too hot */
2698                 return true;
2699         case 0x6022:
2700                 printk(TPACPI_ALERT
2701                         "THERMAL EMERGENCY: "
2702                         "a sensor reports something is extremely hot!\n");
2703                 /* recommended action: immediate sleep/hibernate */
2704                 return true;
2705         default:
2706                 printk(TPACPI_ALERT
2707                          "THERMAL ALERT: unknown thermal alarm received\n");
2708                 return false;
2709         }
2710 }
2711
2712 static void hotkey_notify(struct ibm_struct *ibm, u32 event)
2713 {
2714         u32 hkey;
2715         bool send_acpi_ev;
2716         bool ignore_acpi_ev;
2717         bool known_ev;
2718
2719         if (event != 0x80) {
2720                 printk(TPACPI_ERR
2721                        "unknown HKEY notification event %d\n", event);
2722                 /* forward it to userspace, maybe it knows how to handle it */
2723                 acpi_bus_generate_netlink_event(
2724                                         ibm->acpi->device->pnp.device_class,
2725                                         dev_name(&ibm->acpi->device->dev),
2726                                         event, 0);
2727                 return;
2728         }
2729
2730         while (1) {
2731                 if (!acpi_evalf(hkey_handle, &hkey, "MHKP", "d")) {
2732                         printk(TPACPI_ERR "failed to retrieve HKEY event\n");
2733                         return;
2734                 }
2735
2736                 if (hkey == 0) {
2737                         /* queue empty */
2738                         return;
2739                 }
2740
2741                 send_acpi_ev = true;
2742                 ignore_acpi_ev = false;
2743
2744                 switch (hkey >> 12) {
2745                 case 1:
2746                         /* 0x1000-0x1FFF: key presses */
2747                         known_ev = hotkey_notify_hotkey(hkey, &send_acpi_ev,
2748                                                  &ignore_acpi_ev);
2749                         break;
2750                 case 2:
2751                         /* 0x2000-0x2FFF: Wakeup reason */
2752                         known_ev = hotkey_notify_wakeup(hkey, &send_acpi_ev,
2753                                                  &ignore_acpi_ev);
2754                         break;
2755                 case 3:
2756                         /* 0x3000-0x3FFF: bay-related wakeups */
2757                         if (hkey == 0x3003) {
2758                                 hotkey_autosleep_ack = 1;
2759                                 printk(TPACPI_INFO
2760                                        "bay ejected\n");
2761                                 hotkey_wakeup_hotunplug_complete_notify_change();
2762                                 known_ev = true;
2763                         } else {
2764                                 known_ev = false;
2765                         }
2766                         break;
2767                 case 4:
2768                         /* 0x4000-0x4FFF: dock-related wakeups */
2769                         if (hkey == 0x4003) {
2770                                 hotkey_autosleep_ack = 1;
2771                                 printk(TPACPI_INFO
2772                                        "undocked\n");
2773                                 hotkey_wakeup_hotunplug_complete_notify_change();
2774                                 known_ev = true;
2775                         } else {
2776                                 known_ev = false;
2777                         }
2778                         break;
2779                 case 5:
2780                         /* 0x5000-0x5FFF: human interface helpers */
2781                         known_ev = hotkey_notify_usrevent(hkey, &send_acpi_ev,
2782                                                  &ignore_acpi_ev);
2783                         break;
2784                 case 6:
2785                         /* 0x6000-0x6FFF: thermal alarms */
2786                         known_ev = hotkey_notify_thermal(hkey, &send_acpi_ev,
2787                                                  &ignore_acpi_ev);
2788                         break;
2789                 case 7:
2790                         /* 0x7000-0x7FFF: misc */
2791                         if (tp_features.hotkey_wlsw && hkey == 0x7000) {
2792                                 tpacpi_send_radiosw_update();
2793                                 send_acpi_ev = 0;
2794                                 known_ev = true;
2795                                 break;
2796                         }
2797                         /* fallthrough to default */
2798                 default:
2799                         known_ev = false;
2800                 }
2801                 if (!known_ev) {
2802                         printk(TPACPI_NOTICE
2803                                "unhandled HKEY event 0x%04x\n", hkey);
2804                         printk(TPACPI_NOTICE
2805                                "please report the conditions when this "
2806                                "event happened to %s\n", TPACPI_MAIL);
2807                 }
2808
2809                 /* Legacy events */
2810                 if (!ignore_acpi_ev &&
2811                     (send_acpi_ev || hotkey_report_mode < 2)) {
2812                         acpi_bus_generate_proc_event(ibm->acpi->device,
2813                                                      event, hkey);
2814                 }
2815
2816                 /* netlink events */
2817                 if (!ignore_acpi_ev && send_acpi_ev) {
2818                         acpi_bus_generate_netlink_event(
2819                                         ibm->acpi->device->pnp.device_class,
2820                                         dev_name(&ibm->acpi->device->dev),
2821                                         event, hkey);
2822                 }
2823         }
2824 }
2825
2826 static void hotkey_suspend(pm_message_t state)
2827 {
2828         /* Do these on suspend, we get the events on early resume! */
2829         hotkey_wakeup_reason = TP_ACPI_WAKEUP_NONE;
2830         hotkey_autosleep_ack = 0;
2831 }
2832
2833 static void hotkey_resume(void)
2834 {
2835         tpacpi_disable_brightness_delay();
2836
2837         if (hotkey_mask_get())
2838                 printk(TPACPI_ERR
2839                        "error while trying to read hot key mask "
2840                        "from firmware\n");
2841         tpacpi_send_radiosw_update();
2842         hotkey_tablet_mode_notify_change();
2843         hotkey_wakeup_reason_notify_change();
2844         hotkey_wakeup_hotunplug_complete_notify_change();
2845         hotkey_poll_setup_safe(0);
2846 }
2847
2848 /* procfs -------------------------------------------------------------- */
2849 static int hotkey_read(char *p)
2850 {
2851         int res, status;
2852         int len = 0;
2853
2854         if (!tp_features.hotkey) {
2855                 len += sprintf(p + len, "status:\t\tnot supported\n");
2856                 return len;
2857         }
2858
2859         if (mutex_lock_killable(&hotkey_mutex))
2860                 return -ERESTARTSYS;
2861         res = hotkey_status_get(&status);
2862         if (!res)
2863                 res = hotkey_mask_get();
2864         mutex_unlock(&hotkey_mutex);
2865         if (res)
2866                 return res;
2867
2868         len += sprintf(p + len, "status:\t\t%s\n", enabled(status, 0));
2869         if (tp_features.hotkey_mask) {
2870                 len += sprintf(p + len, "mask:\t\t0x%08x\n", hotkey_mask);
2871                 len += sprintf(p + len,
2872                                "commands:\tenable, disable, reset, <mask>\n");
2873         } else {
2874                 len += sprintf(p + len, "mask:\t\tnot supported\n");
2875                 len += sprintf(p + len, "commands:\tenable, disable, reset\n");
2876         }
2877
2878         return len;
2879 }
2880
2881 static int hotkey_write(char *buf)
2882 {
2883         int res, status;
2884         u32 mask;
2885         char *cmd;
2886
2887         if (!tp_features.hotkey)
2888                 return -ENODEV;
2889
2890         if (mutex_lock_killable(&hotkey_mutex))
2891                 return -ERESTARTSYS;
2892
2893         status = -1;
2894         mask = hotkey_mask;
2895
2896         res = 0;
2897         while ((cmd = next_cmd(&buf))) {
2898                 if (strlencmp(cmd, "enable") == 0) {
2899                         status = 1;
2900                 } else if (strlencmp(cmd, "disable") == 0) {
2901                         status = 0;
2902                 } else if (strlencmp(cmd, "reset") == 0) {
2903                         status = hotkey_orig_status;
2904                         mask = hotkey_orig_mask;
2905                 } else if (sscanf(cmd, "0x%x", &mask) == 1) {
2906                         /* mask set */
2907                 } else if (sscanf(cmd, "%x", &mask) == 1) {
2908                         /* mask set */
2909                 } else {
2910                         res = -EINVAL;
2911                         goto errexit;
2912                 }
2913         }
2914         if (status != -1)
2915                 res = hotkey_status_set(status);
2916
2917         if (!res && mask != hotkey_mask)
2918                 res = hotkey_mask_set(mask);
2919
2920 errexit:
2921         mutex_unlock(&hotkey_mutex);
2922         return res;
2923 }
2924
2925 static const struct acpi_device_id ibm_htk_device_ids[] = {
2926         {TPACPI_ACPI_HKEY_HID, 0},
2927         {"", 0},
2928 };
2929
2930 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver = {
2931         .hid = ibm_htk_device_ids,
2932         .notify = hotkey_notify,
2933         .handle = &hkey_handle,
2934         .type = ACPI_DEVICE_NOTIFY,
2935 };
2936
2937 static struct ibm_struct hotkey_driver_data = {
2938         .name = "hotkey",
2939         .read = hotkey_read,
2940         .write = hotkey_write,
2941         .exit = hotkey_exit,
2942         .resume = hotkey_resume,
2943         .suspend = hotkey_suspend,
2944         .acpi = &ibm_hotkey_acpidriver,
2945 };
2946
2947 /*************************************************************************
2948  * Bluetooth subdriver
2949  */
2950
2951 enum {
2952         /* ACPI GBDC/SBDC bits */
2953         TP_ACPI_BLUETOOTH_HWPRESENT     = 0x01, /* Bluetooth hw available */
2954         TP_ACPI_BLUETOOTH_RADIOSSW      = 0x02, /* Bluetooth radio enabled */
2955         TP_ACPI_BLUETOOTH_RESUMECTRL    = 0x04, /* Bluetooth state at resume:
2956                                                    off / last state */
2957 };
2958
2959 enum {
2960         /* ACPI \BLTH commands */
2961         TP_ACPI_BLTH_GET_ULTRAPORT_ID   = 0x00, /* Get Ultraport BT ID */
2962         TP_ACPI_BLTH_GET_PWR_ON_RESUME  = 0x01, /* Get power-on-resume state */
2963         TP_ACPI_BLTH_PWR_ON_ON_RESUME   = 0x02, /* Resume powered on */
2964         TP_ACPI_BLTH_PWR_OFF_ON_RESUME  = 0x03, /* Resume powered off */
2965         TP_ACPI_BLTH_SAVE_STATE         = 0x05, /* Save state for S4/S5 */
2966 };
2967
2968 static struct rfkill *tpacpi_bluetooth_rfkill;
2969
2970 static void bluetooth_suspend(pm_message_t state)
2971 {
2972         /* Try to make sure radio will resume powered off */
2973         acpi_evalf(NULL, NULL, "\\BLTH", "vd",
2974                    TP_ACPI_BLTH_PWR_OFF_ON_RESUME);
2975 }
2976
2977 static int bluetooth_get_radiosw(void)
2978 {
2979         int status;
2980
2981         if (!tp_features.bluetooth)
2982                 return -ENODEV;
2983
2984         /* WLSW overrides bluetooth in firmware/hardware, reflect that */
2985         if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&status) && !status)
2986                 return RFKILL_STATE_HARD_BLOCKED;
2987
2988 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
2989         if (dbg_bluetoothemul)
2990                 return (tpacpi_bluetooth_emulstate) ?
2991                         RFKILL_STATE_UNBLOCKED : RFKILL_STATE_SOFT_BLOCKED;
2992 #endif
2993
2994         if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
2995                 return -EIO;
2996
2997         return ((status & TP_ACPI_BLUETOOTH_RADIOSSW) != 0) ?
2998                 RFKILL_STATE_UNBLOCKED : RFKILL_STATE_SOFT_BLOCKED;
2999 }
3000
3001 static void bluetooth_update_rfk(void)
3002 {
3003         int status;
3004
3005         if (!tpacpi_bluetooth_rfkill)
3006                 return;
3007
3008         status = bluetooth_get_radiosw();
3009         if (status < 0)
3010                 return;
3011         rfkill_force_state(tpacpi_bluetooth_rfkill, status);
3012 }
3013
3014 static int bluetooth_set_radiosw(int radio_on, int update_rfk)
3015 {
3016         int status;
3017
3018         if (!tp_features.bluetooth)
3019                 return -ENODEV;
3020
3021         /* WLSW overrides bluetooth in firmware/hardware, but there is no
3022          * reason to risk weird behaviour. */
3023         if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&status) && !status
3024             && radio_on)
3025                 return -EPERM;
3026
3027 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3028         if (dbg_bluetoothemul) {
3029                 tpacpi_bluetooth_emulstate = !!radio_on;
3030                 if (update_rfk)
3031                         bluetooth_update_rfk();
3032                 return 0;
3033         }
3034 #endif
3035
3036         /* We make sure to keep TP_ACPI_BLUETOOTH_RESUMECTRL off */
3037         if (radio_on)
3038                 status = TP_ACPI_BLUETOOTH_RADIOSSW;
3039         else
3040                 status = 0;
3041         if (!acpi_evalf(hkey_handle, NULL, "SBDC", "vd", status))
3042                 return -EIO;
3043
3044         if (update_rfk)
3045                 bluetooth_update_rfk();
3046
3047         return 0;
3048 }
3049
3050 /* sysfs bluetooth enable ---------------------------------------------- */
3051 static ssize_t bluetooth_enable_show(struct device *dev,
3052                            struct device_attribute *attr,
3053                            char *buf)
3054 {
3055         int status;
3056
3057         status = bluetooth_get_radiosw();
3058         if (status < 0)
3059                 return status;
3060
3061         return snprintf(buf, PAGE_SIZE, "%d\n",
3062                         (status == RFKILL_STATE_UNBLOCKED) ? 1 : 0);
3063 }
3064
3065 static ssize_t bluetooth_enable_store(struct device *dev,
3066                             struct device_attribute *attr,
3067                             const char *buf, size_t count)
3068 {
3069         unsigned long t;
3070         int res;
3071
3072         if (parse_strtoul(buf, 1, &t))
3073                 return -EINVAL;
3074
3075         res = bluetooth_set_radiosw(t, 1);
3076
3077         return (res) ? res : count;
3078 }
3079
3080 static struct device_attribute dev_attr_bluetooth_enable =
3081         __ATTR(bluetooth_enable, S_IWUSR | S_IRUGO,
3082                 bluetooth_enable_show, bluetooth_enable_store);
3083
3084 /* --------------------------------------------------------------------- */
3085
3086 static struct attribute *bluetooth_attributes[] = {
3087         &dev_attr_bluetooth_enable.attr,
3088         NULL
3089 };
3090
3091 static const struct attribute_group bluetooth_attr_group = {
3092         .attrs = bluetooth_attributes,
3093 };
3094
3095 static int tpacpi_bluetooth_rfk_get(void *data, enum rfkill_state *state)
3096 {
3097         int bts = bluetooth_get_radiosw();
3098
3099         if (bts < 0)
3100                 return bts;
3101
3102         *state = bts;
3103         return 0;
3104 }
3105
3106 static int tpacpi_bluetooth_rfk_set(void *data, enum rfkill_state state)
3107 {
3108         return bluetooth_set_radiosw((state == RFKILL_STATE_UNBLOCKED), 0);
3109 }
3110
3111 static void bluetooth_shutdown(void)
3112 {
3113         /* Order firmware to save current state to NVRAM */
3114         if (!acpi_evalf(NULL, NULL, "\\BLTH", "vd",
3115                         TP_ACPI_BLTH_SAVE_STATE))
3116                 printk(TPACPI_NOTICE
3117                         "failed to save bluetooth state to NVRAM\n");
3118 }
3119
3120 static void bluetooth_exit(void)
3121 {
3122         bluetooth_shutdown();
3123
3124         if (tpacpi_bluetooth_rfkill)
3125                 rfkill_unregister(tpacpi_bluetooth_rfkill);
3126
3127         sysfs_remove_group(&tpacpi_pdev->dev.kobj,
3128                         &bluetooth_attr_group);
3129 }
3130
3131 static int __init bluetooth_init(struct ibm_init_struct *iibm)
3132 {
3133         int res;
3134         int status = 0;
3135
3136         vdbg_printk(TPACPI_DBG_INIT, "initializing bluetooth subdriver\n");
3137
3138         TPACPI_ACPIHANDLE_INIT(hkey);
3139
3140         /* bluetooth not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
3141            G4x, R30, R31, R40e, R50e, T20-22, X20-21 */
3142         tp_features.bluetooth = hkey_handle &&
3143             acpi_evalf(hkey_handle, &status, "GBDC", "qd");
3144
3145         vdbg_printk(TPACPI_DBG_INIT, "bluetooth is %s, status 0x%02x\n",
3146                 str_supported(tp_features.bluetooth),
3147                 status);
3148
3149 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3150         if (dbg_bluetoothemul) {
3151                 tp_features.bluetooth = 1;
3152                 printk(TPACPI_INFO
3153                         "bluetooth switch emulation enabled\n");
3154         } else
3155 #endif
3156         if (tp_features.bluetooth &&
3157             !(status & TP_ACPI_BLUETOOTH_HWPRESENT)) {
3158                 /* no bluetooth hardware present in system */
3159                 tp_features.bluetooth = 0;
3160                 dbg_printk(TPACPI_DBG_INIT,
3161                            "bluetooth hardware not installed\n");
3162         }
3163
3164         if (!tp_features.bluetooth)
3165                 return 1;
3166
3167         res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
3168                                 &bluetooth_attr_group);
3169         if (res)
3170                 return res;
3171
3172         res = tpacpi_new_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID,
3173                                 &tpacpi_bluetooth_rfkill,
3174                                 RFKILL_TYPE_BLUETOOTH,
3175                                 "tpacpi_bluetooth_sw",
3176                                 true,
3177                                 tpacpi_bluetooth_rfk_set,
3178                                 tpacpi_bluetooth_rfk_get);
3179         if (res) {
3180                 bluetooth_exit();
3181                 return res;
3182         }
3183
3184         return 0;
3185 }
3186
3187 /* procfs -------------------------------------------------------------- */
3188 static int bluetooth_read(char *p)
3189 {
3190         int len = 0;
3191         int status = bluetooth_get_radiosw();
3192
3193         if (!tp_features.bluetooth)
3194                 len += sprintf(p + len, "status:\t\tnot supported\n");
3195         else {
3196                 len += sprintf(p + len, "status:\t\t%s\n",
3197                                 (status == RFKILL_STATE_UNBLOCKED) ?
3198                                         "enabled" : "disabled");
3199                 len += sprintf(p + len, "commands:\tenable, disable\n");
3200         }
3201
3202         return len;
3203 }
3204
3205 static int bluetooth_write(char *buf)
3206 {
3207         char *cmd;
3208
3209         if (!tp_features.bluetooth)
3210                 return -ENODEV;
3211
3212         while ((cmd = next_cmd(&buf))) {
3213                 if (strlencmp(cmd, "enable") == 0) {
3214                         bluetooth_set_radiosw(1, 1);
3215                 } else if (strlencmp(cmd, "disable") == 0) {
3216                         bluetooth_set_radiosw(0, 1);
3217                 } else
3218                         return -EINVAL;
3219         }
3220
3221         return 0;
3222 }
3223
3224 static struct ibm_struct bluetooth_driver_data = {
3225         .name = "bluetooth",
3226         .read = bluetooth_read,
3227         .write = bluetooth_write,
3228         .exit = bluetooth_exit,
3229         .suspend = bluetooth_suspend,
3230         .shutdown = bluetooth_shutdown,
3231 };
3232
3233 /*************************************************************************
3234  * Wan subdriver
3235  */
3236
3237 enum {
3238         /* ACPI GWAN/SWAN bits */
3239         TP_ACPI_WANCARD_HWPRESENT       = 0x01, /* Wan hw available */
3240         TP_ACPI_WANCARD_RADIOSSW        = 0x02, /* Wan radio enabled */
3241         TP_ACPI_WANCARD_RESUMECTRL      = 0x04, /* Wan state at resume:
3242                                                    off / last state */
3243 };
3244
3245 static struct rfkill *tpacpi_wan_rfkill;
3246
3247 static void wan_suspend(pm_message_t state)
3248 {
3249         /* Try to make sure radio will resume powered off */
3250         acpi_evalf(NULL, NULL, "\\WGSV", "qvd",
3251                    TP_ACPI_WGSV_PWR_OFF_ON_RESUME);
3252 }
3253
3254 static int wan_get_radiosw(void)
3255 {
3256         int status;
3257
3258         if (!tp_features.wan)
3259                 return -ENODEV;
3260
3261         /* WLSW overrides WWAN in firmware/hardware, reflect that */
3262         if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&status) && !status)
3263                 return RFKILL_STATE_HARD_BLOCKED;
3264
3265 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3266         if (dbg_wwanemul)
3267                 return (tpacpi_wwan_emulstate) ?
3268                         RFKILL_STATE_UNBLOCKED : RFKILL_STATE_SOFT_BLOCKED;
3269 #endif
3270
3271         if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
3272                 return -EIO;
3273
3274         return ((status & TP_ACPI_WANCARD_RADIOSSW) != 0) ?
3275                 RFKILL_STATE_UNBLOCKED : RFKILL_STATE_SOFT_BLOCKED;
3276 }
3277
3278 static void wan_update_rfk(void)
3279 {
3280         int status;
3281
3282         if (!tpacpi_wan_rfkill)
3283                 return;
3284
3285         status = wan_get_radiosw();
3286         if (status < 0)
3287                 return;
3288         rfkill_force_state(tpacpi_wan_rfkill, status);
3289 }
3290
3291 static int wan_set_radiosw(int radio_on, int update_rfk)
3292 {
3293         int status;
3294
3295         if (!tp_features.wan)
3296                 return -ENODEV;
3297
3298         /* WLSW overrides bluetooth in firmware/hardware, but there is no
3299          * reason to risk weird behaviour. */
3300         if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&status) && !status
3301             && radio_on)
3302                 return -EPERM;
3303
3304 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3305         if (dbg_wwanemul) {
3306                 tpacpi_wwan_emulstate = !!radio_on;
3307                 if (update_rfk)
3308                         wan_update_rfk();
3309                 return 0;
3310         }
3311 #endif
3312
3313         /* We make sure to keep TP_ACPI_WANCARD_RESUMECTRL off */
3314         if (radio_on)
3315                 status = TP_ACPI_WANCARD_RADIOSSW;
3316         else
3317                 status = 0;
3318         if (!acpi_evalf(hkey_handle, NULL, "SWAN", "vd", status))
3319                 return -EIO;
3320
3321         if (update_rfk)
3322                 wan_update_rfk();
3323
3324         return 0;
3325 }
3326
3327 /* sysfs wan enable ---------------------------------------------------- */
3328 static ssize_t wan_enable_show(struct device *dev,
3329                            struct device_attribute *attr,
3330                            char *buf)
3331 {
3332         int status;
3333
3334         status = wan_get_radiosw();
3335         if (status < 0)
3336                 return status;
3337
3338         return snprintf(buf, PAGE_SIZE, "%d\n",
3339                         (status == RFKILL_STATE_UNBLOCKED) ? 1 : 0);
3340 }
3341
3342 static ssize_t wan_enable_store(struct device *dev,
3343                             struct device_attribute *attr,
3344                             const char *buf, size_t count)
3345 {
3346         unsigned long t;
3347         int res;
3348
3349         if (parse_strtoul(buf, 1, &t))
3350                 return -EINVAL;
3351
3352         res = wan_set_radiosw(t, 1);
3353
3354         return (res) ? res : count;
3355 }
3356
3357 static struct device_attribute dev_attr_wan_enable =
3358         __ATTR(wwan_enable, S_IWUSR | S_IRUGO,
3359                 wan_enable_show, wan_enable_store);
3360
3361 /* --------------------------------------------------------------------- */
3362
3363 static struct attribute *wan_attributes[] = {
3364         &dev_attr_wan_enable.attr,
3365         NULL
3366 };
3367
3368 static const struct attribute_group wan_attr_group = {
3369         .attrs = wan_attributes,
3370 };
3371
3372 static int tpacpi_wan_rfk_get(void *data, enum rfkill_state *state)
3373 {
3374         int wans = wan_get_radiosw();
3375
3376         if (wans < 0)
3377                 return wans;
3378
3379         *state = wans;
3380         return 0;
3381 }
3382
3383 static int tpacpi_wan_rfk_set(void *data, enum rfkill_state state)
3384 {
3385         return wan_set_radiosw((state == RFKILL_STATE_UNBLOCKED), 0);
3386 }
3387
3388 static void wan_shutdown(void)
3389 {
3390         /* Order firmware to save current state to NVRAM */
3391         if (!acpi_evalf(NULL, NULL, "\\WGSV", "vd",
3392                         TP_ACPI_WGSV_SAVE_STATE))
3393                 printk(TPACPI_NOTICE
3394                         "failed to save WWAN state to NVRAM\n");
3395 }
3396
3397 static void wan_exit(void)
3398 {
3399         wan_shutdown();
3400
3401         if (tpacpi_wan_rfkill)
3402                 rfkill_unregister(tpacpi_wan_rfkill);
3403
3404         sysfs_remove_group(&tpacpi_pdev->dev.kobj,
3405                 &wan_attr_group);
3406 }
3407
3408 static int __init wan_init(struct ibm_init_struct *iibm)
3409 {
3410         int res;
3411         int status = 0;
3412
3413         vdbg_printk(TPACPI_DBG_INIT, "initializing wan subdriver\n");
3414
3415         TPACPI_ACPIHANDLE_INIT(hkey);
3416
3417         tp_features.wan = hkey_handle &&
3418             acpi_evalf(hkey_handle, &status, "GWAN", "qd");
3419
3420         vdbg_printk(TPACPI_DBG_INIT, "wan is %s, status 0x%02x\n",
3421                 str_supported(tp_features.wan),
3422                 status);
3423
3424 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3425         if (dbg_wwanemul) {
3426                 tp_features.wan = 1;
3427                 printk(TPACPI_INFO
3428                         "wwan switch emulation enabled\n");
3429         } else
3430 #endif
3431         if (tp_features.wan &&
3432             !(status & TP_ACPI_WANCARD_HWPRESENT)) {
3433                 /* no wan hardware present in system */
3434                 tp_features.wan = 0;
3435                 dbg_printk(TPACPI_DBG_INIT,
3436                            "wan hardware not installed\n");
3437         }
3438
3439         if (!tp_features.wan)
3440                 return 1;
3441
3442         res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
3443                                 &wan_attr_group);
3444         if (res)
3445                 return res;
3446
3447         res = tpacpi_new_rfkill(TPACPI_RFK_WWAN_SW_ID,
3448                                 &tpacpi_wan_rfkill,
3449                                 RFKILL_TYPE_WWAN,
3450                                 "tpacpi_wwan_sw",
3451                                 true,
3452                                 tpacpi_wan_rfk_set,
3453                                 tpacpi_wan_rfk_get);
3454         if (res) {
3455                 wan_exit();
3456                 return res;
3457         }
3458
3459         return 0;
3460 }
3461
3462 /* procfs -------------------------------------------------------------- */
3463 static int wan_read(char *p)
3464 {
3465         int len = 0;
3466         int status = wan_get_radiosw();
3467
3468         if (!tp_features.wan)
3469                 len += sprintf(p + len, "status:\t\tnot supported\n");
3470         else {
3471                 len += sprintf(p + len, "status:\t\t%s\n",
3472                                 (status == RFKILL_STATE_UNBLOCKED) ?
3473                                         "enabled" : "disabled");
3474                 len += sprintf(p + len, "commands:\tenable, disable\n");
3475         }
3476
3477         return len;
3478 }
3479
3480 static int wan_write(char *buf)
3481 {
3482         char *cmd;
3483
3484         if (!tp_features.wan)
3485                 return -ENODEV;
3486
3487         while ((cmd = next_cmd(&buf))) {
3488                 if (strlencmp(cmd, "enable") == 0) {
3489                         wan_set_radiosw(1, 1);
3490                 } else if (strlencmp(cmd, "disable") == 0) {
3491                         wan_set_radiosw(0, 1);
3492                 } else
3493                         return -EINVAL;
3494         }
3495
3496         return 0;
3497 }
3498
3499 static struct ibm_struct wan_driver_data = {
3500         .name = "wan",
3501         .read = wan_read,
3502         .write = wan_write,
3503         .exit = wan_exit,
3504         .suspend = wan_suspend,
3505         .shutdown = wan_shutdown,
3506 };
3507
3508 /*************************************************************************
3509  * UWB subdriver
3510  */
3511
3512 enum {
3513         /* ACPI GUWB/SUWB bits */
3514         TP_ACPI_UWB_HWPRESENT   = 0x01, /* UWB hw available */
3515         TP_ACPI_UWB_RADIOSSW    = 0x02, /* UWB radio enabled */
3516 };
3517
3518 static struct rfkill *tpacpi_uwb_rfkill;
3519
3520 static int uwb_get_radiosw(void)
3521 {
3522         int status;
3523
3524         if (!tp_features.uwb)
3525                 return -ENODEV;
3526
3527         /* WLSW overrides UWB in firmware/hardware, reflect that */
3528         if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&status) && !status)
3529                 return RFKILL_STATE_HARD_BLOCKED;
3530
3531 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3532         if (dbg_uwbemul)
3533                 return (tpacpi_uwb_emulstate) ?
3534                         RFKILL_STATE_UNBLOCKED : RFKILL_STATE_SOFT_BLOCKED;
3535 #endif
3536
3537         if (!acpi_evalf(hkey_handle, &status, "GUWB", "d"))
3538                 return -EIO;
3539
3540         return ((status & TP_ACPI_UWB_RADIOSSW) != 0) ?
3541                 RFKILL_STATE_UNBLOCKED : RFKILL_STATE_SOFT_BLOCKED;
3542 }
3543
3544 static void uwb_update_rfk(void)
3545 {
3546         int status;
3547
3548         if (!tpacpi_uwb_rfkill)
3549                 return;
3550
3551         status = uwb_get_radiosw();
3552         if (status < 0)
3553                 return;
3554         rfkill_force_state(tpacpi_uwb_rfkill, status);
3555 }
3556
3557 static int uwb_set_radiosw(int radio_on, int update_rfk)
3558 {
3559         int status;
3560
3561         if (!tp_features.uwb)
3562                 return -ENODEV;
3563
3564         /* WLSW overrides UWB in firmware/hardware, but there is no
3565          * reason to risk weird behaviour. */
3566         if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&status) && !status
3567             && radio_on)
3568                 return -EPERM;
3569
3570 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3571         if (dbg_uwbemul) {
3572                 tpacpi_uwb_emulstate = !!radio_on;
3573                 if (update_rfk)
3574                         uwb_update_rfk();
3575                 return 0;
3576         }
3577 #endif
3578
3579         status = (radio_on) ? TP_ACPI_UWB_RADIOSSW : 0;
3580         if (!acpi_evalf(hkey_handle, NULL, "SUWB", "vd", status))
3581                 return -EIO;
3582
3583         if (update_rfk)
3584                 uwb_update_rfk();
3585
3586         return 0;
3587 }
3588
3589 /* --------------------------------------------------------------------- */
3590
3591 static int tpacpi_uwb_rfk_get(void *data, enum rfkill_state *state)
3592 {
3593         int uwbs = uwb_get_radiosw();
3594
3595         if (uwbs < 0)
3596                 return uwbs;
3597
3598         *state = uwbs;
3599         return 0;
3600 }
3601
3602 static int tpacpi_uwb_rfk_set(void *data, enum rfkill_state state)
3603 {
3604         return uwb_set_radiosw((state == RFKILL_STATE_UNBLOCKED), 0);
3605 }
3606
3607 static void uwb_exit(void)
3608 {
3609         if (tpacpi_uwb_rfkill)
3610                 rfkill_unregister(tpacpi_uwb_rfkill);
3611 }
3612
3613 static int __init uwb_init(struct ibm_init_struct *iibm)
3614 {
3615         int res;
3616         int status = 0;
3617
3618         vdbg_printk(TPACPI_DBG_INIT, "initializing uwb subdriver\n");
3619
3620         TPACPI_ACPIHANDLE_INIT(hkey);
3621
3622         tp_features.uwb = hkey_handle &&
3623             acpi_evalf(hkey_handle, &status, "GUWB", "qd");
3624
3625         vdbg_printk(TPACPI_DBG_INIT, "uwb is %s, status 0x%02x\n",
3626                 str_supported(tp_features.uwb),
3627                 status);
3628
3629 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3630         if (dbg_uwbemul) {
3631                 tp_features.uwb = 1;
3632                 printk(TPACPI_INFO
3633                         "uwb switch emulation enabled\n");
3634         } else
3635 #endif
3636         if (tp_features.uwb &&
3637             !(status & TP_ACPI_UWB_HWPRESENT)) {
3638                 /* no uwb hardware present in system */
3639                 tp_features.uwb = 0;
3640                 dbg_printk(TPACPI_DBG_INIT,
3641                            "uwb hardware not installed\n");
3642         }
3643
3644         if (!tp_features.uwb)
3645                 return 1;
3646
3647         res = tpacpi_new_rfkill(TPACPI_RFK_UWB_SW_ID,
3648                                 &tpacpi_uwb_rfkill,
3649                                 RFKILL_TYPE_UWB,
3650                                 "tpacpi_uwb_sw",
3651                                 false,
3652                                 tpacpi_uwb_rfk_set,
3653                                 tpacpi_uwb_rfk_get);
3654
3655         return res;
3656 }
3657
3658 static struct ibm_struct uwb_driver_data = {
3659         .name = "uwb",
3660         .exit = uwb_exit,
3661         .flags.experimental = 1,
3662 };
3663
3664 /*************************************************************************
3665  * Video subdriver
3666  */
3667
3668 #ifdef CONFIG_THINKPAD_ACPI_VIDEO
3669
3670 enum video_access_mode {
3671         TPACPI_VIDEO_NONE = 0,
3672         TPACPI_VIDEO_570,       /* 570 */
3673         TPACPI_VIDEO_770,       /* 600e/x, 770e, 770x */
3674         TPACPI_VIDEO_NEW,       /* all others */
3675 };
3676
3677 enum {  /* video status flags, based on VIDEO_570 */
3678         TP_ACPI_VIDEO_S_LCD = 0x01,     /* LCD output enabled */
3679         TP_ACPI_VIDEO_S_CRT = 0x02,     /* CRT output enabled */
3680         TP_ACPI_VIDEO_S_DVI = 0x08,     /* DVI output enabled */
3681 };
3682
3683 enum {  /* TPACPI_VIDEO_570 constants */
3684         TP_ACPI_VIDEO_570_PHSCMD = 0x87,        /* unknown magic constant :( */
3685         TP_ACPI_VIDEO_570_PHSMASK = 0x03,       /* PHS bits that map to
3686                                                  * video_status_flags */
3687         TP_ACPI_VIDEO_570_PHS2CMD = 0x8b,       /* unknown magic constant :( */
3688         TP_ACPI_VIDEO_570_PHS2SET = 0x80,       /* unknown magic constant :( */
3689 };
3690
3691 static enum video_access_mode video_supported;
3692 static int video_orig_autosw;
3693
3694 static int video_autosw_get(void);
3695 static int video_autosw_set(int enable);
3696
3697 TPACPI_HANDLE(vid2, root, "\\_SB.PCI0.AGPB.VID");       /* G41 */
3698
3699 static int __init video_init(struct ibm_init_struct *iibm)
3700 {
3701         int ivga;
3702
3703         vdbg_printk(TPACPI_DBG_INIT, "initializing video subdriver\n");
3704
3705         TPACPI_ACPIHANDLE_INIT(vid);
3706         TPACPI_ACPIHANDLE_INIT(vid2);
3707
3708         if (vid2_handle && acpi_evalf(NULL, &ivga, "\\IVGA", "d") && ivga)
3709                 /* G41, assume IVGA doesn't change */
3710                 vid_handle = vid2_handle;
3711
3712         if (!vid_handle)
3713                 /* video switching not supported on R30, R31 */
3714                 video_supported = TPACPI_VIDEO_NONE;
3715         else if (acpi_evalf(vid_handle, &video_orig_autosw, "SWIT", "qd"))
3716                 /* 570 */
3717                 video_supported = TPACPI_VIDEO_570;
3718         else if (acpi_evalf(vid_handle, &video_orig_autosw, "^VADL", "qd"))
3719                 /* 600e/x, 770e, 770x */
3720                 video_supported = TPACPI_VIDEO_770;
3721         else
3722                 /* all others */
3723                 video_supported = TPACPI_VIDEO_NEW;
3724
3725         vdbg_printk(TPACPI_DBG_INIT, "video is %s, mode %d\n",
3726                 str_supported(video_supported != TPACPI_VIDEO_NONE),
3727                 video_supported);
3728
3729         return (video_supported != TPACPI_VIDEO_NONE)? 0 : 1;
3730 }
3731
3732 static void video_exit(void)
3733 {
3734         dbg_printk(TPACPI_DBG_EXIT,
3735                    "restoring original video autoswitch mode\n");
3736         if (video_autosw_set(video_orig_autosw))
3737                 printk(TPACPI_ERR "error while trying to restore original "
3738                         "video autoswitch mode\n");
3739 }
3740
3741 static int video_outputsw_get(void)
3742 {
3743         int status = 0;
3744         int i;
3745
3746         switch (video_supported) {
3747         case TPACPI_VIDEO_570:
3748                 if (!acpi_evalf(NULL, &i, "\\_SB.PHS", "dd",
3749                                  TP_ACPI_VIDEO_570_PHSCMD))
3750                         return -EIO;
3751                 status = i & TP_ACPI_VIDEO_570_PHSMASK;
3752                 break;
3753         case TPACPI_VIDEO_770:
3754                 if (!acpi_evalf(NULL, &i, "\\VCDL", "d"))
3755                         return -EIO;
3756                 if (i)
3757                         status |= TP_ACPI_VIDEO_S_LCD;
3758                 if (!acpi_evalf(NULL, &i, "\\VCDC", "d"))
3759                         return -EIO;
3760                 if (i)
3761                         status |= TP_ACPI_VIDEO_S_CRT;
3762                 break;
3763         case TPACPI_VIDEO_NEW:
3764                 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 1) ||
3765                     !acpi_evalf(NULL, &i, "\\VCDC", "d"))
3766                         return -EIO;
3767                 if (i)
3768                         status |= TP_ACPI_VIDEO_S_CRT;
3769
3770                 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0) ||
3771                     !acpi_evalf(NULL, &i, "\\VCDL", "d"))
3772                         return -EIO;
3773                 if (i)
3774                         status |= TP_ACPI_VIDEO_S_LCD;
3775                 if (!acpi_evalf(NULL, &i, "\\VCDD", "d"))
3776                         return -EIO;
3777                 if (i)
3778                         status |= TP_ACPI_VIDEO_S_DVI;
3779                 break;
3780         default:
3781                 return -ENOSYS;
3782         }
3783
3784         return status;
3785 }
3786
3787 static int video_outputsw_set(int status)
3788 {
3789         int autosw;
3790         int res = 0;
3791
3792         switch (video_supported) {
3793         case TPACPI_VIDEO_570:
3794                 res = acpi_evalf(NULL, NULL,
3795                                  "\\_SB.PHS2", "vdd",
3796                                  TP_ACPI_VIDEO_570_PHS2CMD,
3797                                  status | TP_ACPI_VIDEO_570_PHS2SET);
3798                 break;
3799         case TPACPI_VIDEO_770:
3800                 autosw = video_autosw_get();
3801                 if (autosw < 0)
3802                         return autosw;
3803
3804                 res = video_autosw_set(1);
3805                 if (res)
3806                         return res;
3807                 res = acpi_evalf(vid_handle, NULL,
3808                                  "ASWT", "vdd", status * 0x100, 0);
3809                 if (!autosw && video_autosw_set(autosw)) {
3810                         printk(TPACPI_ERR
3811                                "video auto-switch left enabled due to error\n");
3812                         return -EIO;
3813                 }
3814                 break;
3815         case TPACPI_VIDEO_NEW:
3816                 res = acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0x80) &&
3817                       acpi_evalf(NULL, NULL, "\\VSDS", "vdd", status, 1);
3818                 break;
3819         default:
3820                 return -ENOSYS;
3821         }
3822
3823         return (res)? 0 : -EIO;
3824 }
3825
3826 static int video_autosw_get(void)
3827 {
3828         int autosw = 0;
3829
3830         switch (video_supported) {
3831         case TPACPI_VIDEO_570:
3832                 if (!acpi_evalf(vid_handle, &autosw, "SWIT", "d"))
3833                         return -EIO;
3834                 break;
3835         case TPACPI_VIDEO_770:
3836         case TPACPI_VIDEO_NEW:
3837                 if (!acpi_evalf(vid_handle, &autosw, "^VDEE", "d"))
3838                         return -EIO;
3839                 break;
3840         default:
3841                 return -ENOSYS;
3842         }
3843
3844         return autosw & 1;
3845 }
3846
3847 static int video_autosw_set(int enable)
3848 {
3849         if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", (enable)? 1 : 0))
3850                 return -EIO;
3851         return 0;
3852 }
3853
3854 static int video_outputsw_cycle(void)
3855 {
3856         int autosw = video_autosw_get();
3857         int res;
3858
3859         if (autosw < 0)
3860                 return autosw;
3861
3862         switch (video_supported) {
3863         case TPACPI_VIDEO_570:
3864                 res = video_autosw_set(1);
3865                 if (res)
3866                         return res;
3867                 res = acpi_evalf(ec_handle, NULL, "_Q16", "v");
3868                 break;
3869         case TPACPI_VIDEO_770:
3870         case TPACPI_VIDEO_NEW:
3871                 res = video_autosw_set(1);
3872                 if (res)
3873                         return res;
3874                 res = acpi_evalf(vid_handle, NULL, "VSWT", "v");
3875                 break;
3876         default:
3877                 return -ENOSYS;
3878         }
3879         if (!autosw && video_autosw_set(autosw)) {
3880                 printk(TPACPI_ERR
3881                        "video auto-switch left enabled due to error\n");
3882                 return -EIO;
3883         }
3884
3885         return (res)? 0 : -EIO;
3886 }
3887
3888 static int video_expand_toggle(void)
3889 {
3890         switch (video_supported) {
3891         case TPACPI_VIDEO_570:
3892                 return acpi_evalf(ec_handle, NULL, "_Q17", "v")?
3893                         0 : -EIO;
3894         case TPACPI_VIDEO_770:
3895                 return acpi_evalf(vid_handle, NULL, "VEXP", "v")?
3896                         0 : -EIO;
3897         case TPACPI_VIDEO_NEW:
3898                 return acpi_evalf(NULL, NULL, "\\VEXP", "v")?
3899                         0 : -EIO;
3900         default:
3901                 return -ENOSYS;
3902         }
3903         /* not reached */
3904 }
3905
3906 static int video_read(char *p)
3907 {
3908         int status, autosw;
3909         int len = 0;
3910
3911         if (video_supported == TPACPI_VIDEO_NONE) {
3912                 len += sprintf(p + len, "status:\t\tnot supported\n");
3913                 return len;
3914         }
3915
3916         status = video_outputsw_get();
3917         if (status < 0)
3918                 return status;
3919
3920         autosw = video_autosw_get();
3921         if (autosw < 0)
3922                 return autosw;
3923
3924         len += sprintf(p + len, "status:\t\tsupported\n");
3925         len += sprintf(p + len, "lcd:\t\t%s\n", enabled(status, 0));
3926         len += sprintf(p + len, "crt:\t\t%s\n", enabled(status, 1));
3927         if (video_supported == TPACPI_VIDEO_NEW)
3928                 len += sprintf(p + len, "dvi:\t\t%s\n", enabled(status, 3));
3929         len += sprintf(p + len, "auto:\t\t%s\n", enabled(autosw, 0));
3930         len += sprintf(p + len, "commands:\tlcd_enable, lcd_disable\n");
3931         len += sprintf(p + len, "commands:\tcrt_enable, crt_disable\n");
3932         if (video_supported == TPACPI_VIDEO_NEW)
3933                 len += sprintf(p + len, "commands:\tdvi_enable, dvi_disable\n");
3934         len += sprintf(p + len, "commands:\tauto_enable, auto_disable\n");
3935         len += sprintf(p + len, "commands:\tvideo_switch, expand_toggle\n");
3936
3937         return len;
3938 }
3939
3940 static int video_write(char *buf)
3941 {
3942         char *cmd;
3943         int enable, disable, status;
3944         int res;
3945
3946         if (video_supported == TPACPI_VIDEO_NONE)
3947                 return -ENODEV;
3948
3949         enable = 0;
3950         disable = 0;
3951
3952         while ((cmd = next_cmd(&buf))) {
3953                 if (strlencmp(cmd, "lcd_enable") == 0) {
3954                         enable |= TP_ACPI_VIDEO_S_LCD;
3955                 } else if (strlencmp(cmd, "lcd_disable") == 0) {
3956                         disable |= TP_ACPI_VIDEO_S_LCD;
3957                 } else if (strlencmp(cmd, "crt_enable") == 0) {
3958                         enable |= TP_ACPI_VIDEO_S_CRT;
3959                 } else if (strlencmp(cmd, "crt_disable") == 0) {
3960                         disable |= TP_ACPI_VIDEO_S_CRT;
3961                 } else if (video_supported == TPACPI_VIDEO_NEW &&
3962                            strlencmp(cmd, "dvi_enable") == 0) {
3963                         enable |= TP_ACPI_VIDEO_S_DVI;
3964                 } else if (video_supported == TPACPI_VIDEO_NEW &&
3965                            strlencmp(cmd, "dvi_disable") == 0) {
3966                         disable |= TP_ACPI_VIDEO_S_DVI;
3967                 } else if (strlencmp(cmd, "auto_enable") == 0) {
3968                         res = video_autosw_set(1);
3969                         if (res)
3970                                 return res;
3971                 } else if (strlencmp(cmd, "auto_disable") == 0) {
3972                         res = video_autosw_set(0);
3973                         if (res)
3974                                 return res;
3975                 } else if (strlencmp(cmd, "video_switch") == 0) {
3976                         res = video_outputsw_cycle();
3977                         if (res)
3978                                 return res;
3979                 } else if (strlencmp(cmd, "expand_toggle") == 0) {
3980                         res = video_expand_toggle();
3981                         if (res)
3982                                 return res;
3983                 } else
3984                         return -EINVAL;
3985         }
3986
3987         if (enable || disable) {
3988                 status = video_outputsw_get();
3989                 if (status < 0)
3990                         return status;
3991                 res = video_outputsw_set((status & ~disable) | enable);
3992                 if (res)
3993                         return res;
3994         }
3995
3996         return 0;
3997 }
3998
3999 static struct ibm_struct video_driver_data = {
4000         .name = "video",
4001         .read = video_read,
4002         .write = video_write,
4003         .exit = video_exit,
4004 };
4005
4006 #endif /* CONFIG_THINKPAD_ACPI_VIDEO */
4007
4008 /*************************************************************************
4009  * Light (thinklight) subdriver
4010  */
4011
4012 TPACPI_HANDLE(lght, root, "\\LGHT");    /* A21e, A2xm/p, T20-22, X20-21 */
4013 TPACPI_HANDLE(ledb, ec, "LEDB");                /* G4x */
4014
4015 static int light_get_status(void)
4016 {
4017         int status = 0;
4018
4019         if (tp_features.light_status) {
4020                 if (!acpi_evalf(ec_handle, &status, "KBLT", "d"))
4021                         return -EIO;
4022                 return (!!status);
4023         }
4024
4025         return -ENXIO;
4026 }
4027
4028 static int light_set_status(int status)
4029 {
4030         int rc;
4031
4032         if (tp_features.light) {
4033                 if (cmos_handle) {
4034                         rc = acpi_evalf(cmos_handle, NULL, NULL, "vd",
4035                                         (status)?
4036                                                 TP_CMOS_THINKLIGHT_ON :
4037                                                 TP_CMOS_THINKLIGHT_OFF);
4038                 } else {
4039                         rc = acpi_evalf(lght_handle, NULL, NULL, "vd",
4040                                         (status)? 1 : 0);
4041                 }
4042                 return (rc)? 0 : -EIO;
4043         }
4044
4045         return -ENXIO;
4046 }
4047
4048 static void light_set_status_worker(struct work_struct *work)
4049 {
4050         struct tpacpi_led_classdev *data =
4051                         container_of(work, struct tpacpi_led_classdev, work);
4052
4053         if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING))
4054                 light_set_status((data->new_brightness != LED_OFF));
4055 }
4056
4057 static void light_sysfs_set(struct led_classdev *led_cdev,
4058                         enum led_brightness brightness)
4059 {
4060         struct tpacpi_led_classdev *data =
4061                 container_of(led_cdev,
4062                              struct tpacpi_led_classdev,
4063                              led_classdev);
4064         data->new_brightness = brightness;
4065         queue_work(tpacpi_wq, &data->work);
4066 }
4067
4068 static enum led_brightness light_sysfs_get(struct led_classdev *led_cdev)
4069 {
4070         return (light_get_status() == 1)? LED_FULL : LED_OFF;
4071 }
4072
4073 static struct tpacpi_led_classdev tpacpi_led_thinklight = {
4074         .led_classdev = {
4075                 .name           = "tpacpi::thinklight",
4076                 .brightness_set = &light_sysfs_set,
4077                 .brightness_get = &light_sysfs_get,
4078         }
4079 };
4080
4081 static int __init light_init(struct ibm_init_struct *iibm)
4082 {
4083         int rc;
4084
4085         vdbg_printk(TPACPI_DBG_INIT, "initializing light subdriver\n");
4086
4087         TPACPI_ACPIHANDLE_INIT(ledb);
4088         TPACPI_ACPIHANDLE_INIT(lght);
4089         TPACPI_ACPIHANDLE_INIT(cmos);
4090         INIT_WORK(&tpacpi_led_thinklight.work, light_set_status_worker);
4091
4092         /* light not supported on 570, 600e/x, 770e, 770x, G4x, R30, R31 */
4093         tp_features.light = (cmos_handle || lght_handle) && !ledb_handle;
4094
4095         if (tp_features.light)
4096                 /* light status not supported on
4097                    570, 600e/x, 770e, 770x, G4x, R30, R31, R32, X20 */
4098                 tp_features.light_status =
4099                         acpi_evalf(ec_handle, NULL, "KBLT", "qv");
4100
4101         vdbg_printk(TPACPI_DBG_INIT, "light is %s, light status is %s\n",
4102                 str_supported(tp_features.light),
4103                 str_supported(tp_features.light_status));
4104
4105         if (!tp_features.light)
4106                 return 1;
4107
4108         rc = led_classdev_register(&tpacpi_pdev->dev,
4109                                    &tpacpi_led_thinklight.led_classdev);
4110
4111         if (rc < 0) {
4112                 tp_features.light = 0;
4113                 tp_features.light_status = 0;
4114         } else  {
4115                 rc = 0;
4116         }
4117
4118         return rc;
4119 }
4120
4121 static void light_exit(void)
4122 {
4123         led_classdev_unregister(&tpacpi_led_thinklight.led_classdev);
4124         if (work_pending(&tpacpi_led_thinklight.work))
4125                 flush_workqueue(tpacpi_wq);
4126 }
4127
4128 static int light_read(char *p)
4129 {
4130         int len = 0;
4131         int status;
4132
4133         if (!tp_features.light) {
4134                 len += sprintf(p + len, "status:\t\tnot supported\n");
4135         } else if (!tp_features.light_status) {
4136                 len += sprintf(p + len, "status:\t\tunknown\n");
4137                 len += sprintf(p + len, "commands:\ton, off\n");
4138         } else {
4139                 status = light_get_status();
4140                 if (status < 0)
4141                         return status;
4142                 len += sprintf(p + len, "status:\t\t%s\n", onoff(status, 0));
4143                 len += sprintf(p + len, "commands:\ton, off\n");
4144         }
4145
4146         return len;
4147 }
4148
4149 static int light_write(char *buf)
4150 {
4151         char *cmd;
4152         int newstatus = 0;
4153
4154         if (!tp_features.light)
4155                 return -ENODEV;
4156
4157         while ((cmd = next_cmd(&buf))) {
4158                 if (strlencmp(cmd, "on") == 0) {
4159                         newstatus = 1;
4160                 } else if (strlencmp(cmd, "off") == 0) {
4161                         newstatus = 0;
4162                 } else
4163                         return -EINVAL;
4164         }
4165
4166         return light_set_status(newstatus);
4167 }
4168
4169 static struct ibm_struct light_driver_data = {
4170         .name = "light",
4171         .read = light_read,
4172         .write = light_write,
4173         .exit = light_exit,
4174 };
4175
4176 /*************************************************************************
4177  * Dock subdriver
4178  */
4179
4180 #ifdef CONFIG_THINKPAD_ACPI_DOCK
4181
4182 static void dock_notify(struct ibm_struct *ibm, u32 event);
4183 static int dock_read(char *p);
4184 static int dock_write(char *buf);
4185
4186 TPACPI_HANDLE(dock, root, "\\_SB.GDCK", /* X30, X31, X40 */
4187            "\\_SB.PCI0.DOCK",   /* 600e/x,770e,770x,A2xm/p,T20-22,X20-21 */
4188            "\\_SB.PCI0.PCI1.DOCK",      /* all others */
4189            "\\_SB.PCI.ISA.SLCE",        /* 570 */
4190     );                          /* A21e,G4x,R30,R31,R32,R40,R40e,R50e */
4191
4192 /* don't list other alternatives as we install a notify handler on the 570 */
4193 TPACPI_HANDLE(pci, root, "\\_SB.PCI");  /* 570 */
4194
4195 static const struct acpi_device_id ibm_pci_device_ids[] = {
4196         {PCI_ROOT_HID_STRING, 0},
4197         {"", 0},
4198 };
4199
4200 static struct tp_acpi_drv_struct ibm_dock_acpidriver[2] = {
4201         {
4202          .notify = dock_notify,
4203          .handle = &dock_handle,
4204          .type = ACPI_SYSTEM_NOTIFY,
4205         },
4206         {
4207         /* THIS ONE MUST NEVER BE USED FOR DRIVER AUTOLOADING.
4208          * We just use it to get notifications of dock hotplug
4209          * in very old thinkpads */
4210          .hid = ibm_pci_device_ids,
4211          .notify = dock_notify,
4212          .handle = &pci_handle,
4213          .type = ACPI_SYSTEM_NOTIFY,
4214         },
4215 };
4216
4217 static struct ibm_struct dock_driver_data[2] = {
4218         {
4219          .name = "dock",
4220          .read = dock_read,
4221          .write = dock_write,
4222          .acpi = &ibm_dock_acpidriver[0],
4223         },
4224         {
4225          .name = "dock",
4226          .acpi = &ibm_dock_acpidriver[1],
4227         },
4228 };
4229
4230 #define dock_docked() (_sta(dock_handle) & 1)
4231
4232 static int __init dock_init(struct ibm_init_struct *iibm)
4233 {
4234         vdbg_printk(TPACPI_DBG_INIT, "initializing dock subdriver\n");
4235
4236         TPACPI_ACPIHANDLE_INIT(dock);
4237
4238         vdbg_printk(TPACPI_DBG_INIT, "dock is %s\n",
4239                 str_supported(dock_handle != NULL));
4240
4241         return (dock_handle)? 0 : 1;
4242 }
4243
4244 static int __init dock_init2(struct ibm_init_struct *iibm)
4245 {
4246         int dock2_needed;
4247
4248         vdbg_printk(TPACPI_DBG_INIT, "initializing dock subdriver part 2\n");
4249
4250         if (dock_driver_data[0].flags.acpi_driver_registered &&
4251             dock_driver_data[0].flags.acpi_notify_installed) {
4252                 TPACPI_ACPIHANDLE_INIT(pci);
4253                 dock2_needed = (pci_handle != NULL);
4254                 vdbg_printk(TPACPI_DBG_INIT,
4255                             "dock PCI handler for the TP 570 is %s\n",
4256                             str_supported(dock2_needed));
4257         } else {
4258                 vdbg_printk(TPACPI_DBG_INIT,
4259                 "dock subdriver part 2 not required\n");
4260                 dock2_needed = 0;
4261         }
4262
4263         return (dock2_needed)? 0 : 1;
4264 }
4265
4266 static void dock_notify(struct ibm_struct *ibm, u32 event)
4267 {
4268         int docked = dock_docked();
4269         int pci = ibm->acpi->hid && ibm->acpi->device &&
4270                 acpi_match_device_ids(ibm->acpi->device, ibm_pci_device_ids);
4271         int data;
4272
4273         if (event == 1 && !pci) /* 570 */
4274                 data = 1;       /* button */
4275         else if (event == 1 && pci)     /* 570 */
4276                 data = 3;       /* dock */
4277         else if (event == 3 && docked)
4278                 data = 1;       /* button */
4279         else if (event == 3 && !docked)
4280                 data = 2;       /* undock */
4281         else if (event == 0 && docked)
4282                 data = 3;       /* dock */
4283         else {
4284                 printk(TPACPI_ERR "unknown dock event %d, status %d\n",
4285                        event, _sta(dock_handle));
4286                 data = 0;       /* unknown */
4287         }
4288         acpi_bus_generate_proc_event(ibm->acpi->device, event, data);
4289         acpi_bus_generate_netlink_event(ibm->acpi->device->pnp.device_class,
4290                                           dev_name(&ibm->acpi->device->dev),
4291                                           event, data);
4292 }
4293
4294 static int dock_read(char *p)
4295 {
4296         int len = 0;
4297         int docked = dock_docked();
4298
4299         if (!dock_handle)
4300                 len += sprintf(p + len, "status:\t\tnot supported\n");
4301         else if (!docked)
4302                 len += sprintf(p + len, "status:\t\tundocked\n");
4303         else {
4304                 len += sprintf(p + len, "status:\t\tdocked\n");
4305                 len += sprintf(p + len, "commands:\tdock, undock\n");
4306         }
4307
4308         return len;
4309 }
4310
4311 static int dock_write(char *buf)
4312 {
4313         char *cmd;
4314
4315         if (!dock_docked())
4316                 return -ENODEV;
4317
4318         while ((cmd = next_cmd(&buf))) {
4319                 if (strlencmp(cmd, "undock") == 0) {
4320                         if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 0) ||
4321                             !acpi_evalf(dock_handle, NULL, "_EJ0", "vd", 1))
4322                                 return -EIO;
4323                 } else if (strlencmp(cmd, "dock") == 0) {
4324                         if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 1))
4325                                 return -EIO;
4326                 } else
4327                         return -EINVAL;
4328         }
4329
4330         return 0;
4331 }
4332
4333 #endif /* CONFIG_THINKPAD_ACPI_DOCK */
4334
4335 /*************************************************************************
4336  * Bay subdriver
4337  */
4338
4339 #ifdef CONFIG_THINKPAD_ACPI_BAY
4340
4341 TPACPI_HANDLE(bay, root, "\\_SB.PCI.IDE.SECN.MAST",     /* 570 */
4342            "\\_SB.PCI0.IDE0.IDES.IDSM", /* 600e/x, 770e, 770x */
4343            "\\_SB.PCI0.SATA.SCND.MSTR", /* T60, X60, Z60 */
4344            "\\_SB.PCI0.IDE0.SCND.MSTR", /* all others */
4345            );                           /* A21e, R30, R31 */
4346 TPACPI_HANDLE(bay_ej, bay, "_EJ3",      /* 600e/x, A2xm/p, A3x */
4347            "_EJ0",              /* all others */
4348            );                   /* 570,A21e,G4x,R30,R31,R32,R40e,R50e */
4349 TPACPI_HANDLE(bay2, root, "\\_SB.PCI0.IDE0.PRIM.SLAV",  /* A3x, R32 */
4350            "\\_SB.PCI0.IDE0.IDEP.IDPS", /* 600e/x, 770e, 770x */
4351            );                           /* all others */
4352 TPACPI_HANDLE(bay2_ej, bay2, "_EJ3",    /* 600e/x, 770e, A3x */
4353            "_EJ0",                      /* 770x */
4354            );                           /* all others */
4355
4356 static int __init bay_init(struct ibm_init_struct *iibm)
4357 {
4358         vdbg_printk(TPACPI_DBG_INIT, "initializing bay subdriver\n");
4359
4360         TPACPI_ACPIHANDLE_INIT(bay);
4361         if (bay_handle)
4362                 TPACPI_ACPIHANDLE_INIT(bay_ej);
4363         TPACPI_ACPIHANDLE_INIT(bay2);
4364         if (bay2_handle)
4365                 TPACPI_ACPIHANDLE_INIT(bay2_ej);
4366
4367         tp_features.bay_status = bay_handle &&
4368                 acpi_evalf(bay_handle, NULL, "_STA", "qv");
4369         tp_features.bay_status2 = bay2_handle &&
4370                 acpi_evalf(bay2_handle, NULL, "_STA", "qv");
4371
4372         tp_features.bay_eject = bay_handle && bay_ej_handle &&
4373                 (strlencmp(bay_ej_path, "_EJ0") == 0 || experimental);
4374         tp_features.bay_eject2 = bay2_handle && bay2_ej_handle &&
4375                 (strlencmp(bay2_ej_path, "_EJ0") == 0 || experimental);
4376
4377         vdbg_printk(TPACPI_DBG_INIT,
4378                 "bay 1: status %s, eject %s; bay 2: status %s, eject %s\n",
4379                 str_supported(tp_features.bay_status),
4380                 str_supported(tp_features.bay_eject),
4381                 str_supported(tp_features.bay_status2),
4382                 str_supported(tp_features.bay_eject2));
4383
4384         return (tp_features.bay_status || tp_features.bay_eject ||
4385                 tp_features.bay_status2 || tp_features.bay_eject2)? 0 : 1;
4386 }
4387
4388 static void bay_notify(struct ibm_struct *ibm, u32 event)
4389 {
4390         acpi_bus_generate_proc_event(ibm->acpi->device, event, 0);
4391         acpi_bus_generate_netlink_event(ibm->acpi->device->pnp.device_class,
4392                                           dev_name(&ibm->acpi->device->dev),
4393                                           event, 0);
4394 }
4395
4396 #define bay_occupied(b) (_sta(b##_handle) & 1)
4397
4398 static int bay_read(char *p)
4399 {
4400         int len = 0;
4401         int occupied = bay_occupied(bay);
4402         int occupied2 = bay_occupied(bay2);
4403         int eject, eject2;
4404
4405         len += sprintf(p + len, "status:\t\t%s\n",
4406                 tp_features.bay_status ?
4407                         (occupied ? "occupied" : "unoccupied") :
4408                                 "not supported");
4409         if (tp_features.bay_status2)
4410                 len += sprintf(p + len, "status2:\t%s\n", occupied2 ?
4411                                "occupied" : "unoccupied");
4412
4413         eject = tp_features.bay_eject && occupied;
4414         eject2 = tp_features.bay_eject2 && occupied2;
4415
4416         if (eject && eject2)
4417                 len += sprintf(p + len, "commands:\teject, eject2\n");
4418         else if (eject)
4419                 len += sprintf(p + len, "commands:\teject\n");
4420         else if (eject2)
4421                 len += sprintf(p + len, "commands:\teject2\n");
4422
4423         return len;
4424 }
4425
4426 static int bay_write(char *buf)
4427 {
4428         char *cmd;
4429
4430         if (!tp_features.bay_eject && !tp_features.bay_eject2)
4431                 return -ENODEV;
4432
4433         while ((cmd = next_cmd(&buf))) {
4434                 if (tp_features.bay_eject && strlencmp(cmd, "eject") == 0) {
4435                         if (!acpi_evalf(bay_ej_handle, NULL, NULL, "vd", 1))
4436                                 return -EIO;
4437                 } else if (tp_features.bay_eject2 &&
4438                            strlencmp(cmd, "eject2") == 0) {
4439                         if (!acpi_evalf(bay2_ej_handle, NULL, NULL, "vd", 1))
4440                                 return -EIO;
4441                 } else
4442                         return -EINVAL;
4443         }
4444
4445         return 0;
4446 }
4447
4448 static struct tp_acpi_drv_struct ibm_bay_acpidriver = {
4449         .notify = bay_notify,
4450         .handle = &bay_handle,
4451         .type = ACPI_SYSTEM_NOTIFY,
4452 };
4453
4454 static struct ibm_struct bay_driver_data = {
4455         .name = "bay",
4456         .read = bay_read,
4457         .write = bay_write,
4458         .acpi = &ibm_bay_acpidriver,
4459 };
4460
4461 #endif /* CONFIG_THINKPAD_ACPI_BAY */
4462
4463 /*************************************************************************
4464  * CMOS subdriver
4465  */
4466
4467 /* sysfs cmos_command -------------------------------------------------- */
4468 static ssize_t cmos_command_store(struct device *dev,
4469                             struct device_attribute *attr,
4470                             const char *buf, size_t count)
4471 {
4472         unsigned long cmos_cmd;
4473         int res;
4474
4475         if (parse_strtoul(buf, 21, &cmos_cmd))
4476                 return -EINVAL;
4477
4478         res = issue_thinkpad_cmos_command(cmos_cmd);
4479         return (res)? res : count;
4480 }
4481
4482 static struct device_attribute dev_attr_cmos_command =
4483         __ATTR(cmos_command, S_IWUSR, NULL, cmos_command_store);
4484
4485 /* --------------------------------------------------------------------- */
4486
4487 static int __init cmos_init(struct ibm_init_struct *iibm)
4488 {
4489         int res;
4490
4491         vdbg_printk(TPACPI_DBG_INIT,
4492                 "initializing cmos commands subdriver\n");
4493
4494         TPACPI_ACPIHANDLE_INIT(cmos);
4495
4496         vdbg_printk(TPACPI_DBG_INIT, "cmos commands are %s\n",
4497                 str_supported(cmos_handle != NULL));
4498
4499         res = device_create_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
4500         if (res)
4501                 return res;
4502
4503         return (cmos_handle)? 0 : 1;
4504 }
4505
4506 static void cmos_exit(void)
4507 {
4508         device_remove_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
4509 }
4510
4511 static int cmos_read(char *p)
4512 {
4513         int len = 0;
4514
4515         /* cmos not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
4516            R30, R31, T20-22, X20-21 */
4517         if (!cmos_handle)
4518                 len += sprintf(p + len, "status:\t\tnot supported\n");
4519         else {
4520                 len += sprintf(p + len, "status:\t\tsupported\n");
4521                 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-21)\n");
4522         }
4523
4524         return len;
4525 }
4526
4527 static int cmos_write(char *buf)
4528 {
4529         char *cmd;
4530         int cmos_cmd, res;
4531
4532         while ((cmd = next_cmd(&buf))) {
4533                 if (sscanf(cmd, "%u", &cmos_cmd) == 1 &&
4534                     cmos_cmd >= 0 && cmos_cmd <= 21) {
4535                         /* cmos_cmd set */
4536                 } else
4537                         return -EINVAL;
4538
4539                 res = issue_thinkpad_cmos_command(cmos_cmd);
4540                 if (res)
4541                         return res;
4542         }
4543
4544         return 0;
4545 }
4546
4547 static struct ibm_struct cmos_driver_data = {
4548         .name = "cmos",
4549         .read = cmos_read,
4550         .write = cmos_write,
4551         .exit = cmos_exit,
4552 };
4553
4554 /*************************************************************************
4555  * LED subdriver
4556  */
4557
4558 enum led_access_mode {
4559         TPACPI_LED_NONE = 0,
4560         TPACPI_LED_570, /* 570 */
4561         TPACPI_LED_OLD, /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
4562         TPACPI_LED_NEW, /* all others */
4563 };
4564
4565 enum {  /* For TPACPI_LED_OLD */
4566         TPACPI_LED_EC_HLCL = 0x0c,      /* EC reg to get led to power on */
4567         TPACPI_LED_EC_HLBL = 0x0d,      /* EC reg to blink a lit led */
4568         TPACPI_LED_EC_HLMS = 0x0e,      /* EC reg to select led to command */
4569 };
4570
4571 enum led_status_t {
4572         TPACPI_LED_OFF = 0,
4573         TPACPI_LED_ON,
4574         TPACPI_LED_BLINK,
4575 };
4576
4577 static enum led_access_mode led_supported;
4578
4579 TPACPI_HANDLE(led, ec, "SLED",  /* 570 */
4580            "SYSL",              /* 600e/x, 770e, 770x, A21e, A2xm/p, */
4581                                 /* T20-22, X20-21 */
4582            "LED",               /* all others */
4583            );                   /* R30, R31 */
4584
4585 #define TPACPI_LED_NUMLEDS 8
4586 static struct tpacpi_led_classdev *tpacpi_leds;
4587 static enum led_status_t tpacpi_led_state_cache[TPACPI_LED_NUMLEDS];
4588 static const char * const tpacpi_led_names[TPACPI_LED_NUMLEDS] = {
4589         /* there's a limit of 19 chars + NULL before 2.6.26 */
4590         "tpacpi::power",
4591         "tpacpi:orange:batt",
4592         "tpacpi:green:batt",
4593         "tpacpi::dock_active",
4594         "tpacpi::bay_active",
4595         "tpacpi::dock_batt",
4596         "tpacpi::unknown_led",
4597         "tpacpi::standby",
4598 };
4599
4600 static int led_get_status(const unsigned int led)
4601 {
4602         int status;
4603         enum led_status_t led_s;
4604
4605         switch (led_supported) {
4606         case TPACPI_LED_570:
4607                 if (!acpi_evalf(ec_handle,
4608                                 &status, "GLED", "dd", 1 << led))
4609                         return -EIO;
4610                 led_s = (status == 0)?
4611                                 TPACPI_LED_OFF :
4612                                 ((status == 1)?
4613                                         TPACPI_LED_ON :
4614                                         TPACPI_LED_BLINK);
4615                 tpacpi_led_state_cache[led] = led_s;
4616                 return led_s;
4617         default:
4618                 return -ENXIO;
4619         }
4620
4621         /* not reached */
4622 }
4623
4624 static int led_set_status(const unsigned int led,
4625                           const enum led_status_t ledstatus)
4626 {
4627         /* off, on, blink. Index is led_status_t */
4628         static const unsigned int led_sled_arg1[] = { 0, 1, 3 };
4629         static const unsigned int led_led_arg1[] = { 0, 0x80, 0xc0 };
4630
4631         int rc = 0;
4632
4633         switch (led_supported) {
4634         case TPACPI_LED_570:
4635                 /* 570 */
4636                 if (led > 7)
4637                         return -EINVAL;
4638                 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
4639                                 (1 << led), led_sled_arg1[ledstatus]))
4640                         rc = -EIO;
4641                 break;
4642         case TPACPI_LED_OLD:
4643                 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */
4644                 if (led > 7)
4645                         return -EINVAL;
4646                 rc = ec_write(TPACPI_LED_EC_HLMS, (1 << led));
4647                 if (rc >= 0)
4648                         rc = ec_write(TPACPI_LED_EC_HLBL,
4649                                       (ledstatus == TPACPI_LED_BLINK) << led);
4650                 if (rc >= 0)
4651                         rc = ec_write(TPACPI_LED_EC_HLCL,
4652                                       (ledstatus != TPACPI_LED_OFF) << led);
4653                 break;
4654         case TPACPI_LED_NEW:
4655                 /* all others */
4656                 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
4657                                 led, led_led_arg1[ledstatus]))
4658                         rc = -EIO;
4659                 break;
4660         default:
4661                 rc = -ENXIO;
4662         }
4663
4664         if (!rc)
4665                 tpacpi_led_state_cache[led] = ledstatus;
4666
4667         return rc;
4668 }
4669
4670 static void led_sysfs_set_status(unsigned int led,
4671                                  enum led_brightness brightness)
4672 {
4673         led_set_status(led,
4674                         (brightness == LED_OFF) ?
4675                         TPACPI_LED_OFF :
4676                         (tpacpi_led_state_cache[led] == TPACPI_LED_BLINK) ?
4677                                 TPACPI_LED_BLINK : TPACPI_LED_ON);
4678 }
4679
4680 static void led_set_status_worker(struct work_struct *work)
4681 {
4682         struct tpacpi_led_classdev *data =
4683                 container_of(work, struct tpacpi_led_classdev, work);
4684
4685         if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING))
4686                 led_sysfs_set_status(data->led, data->new_brightness);
4687 }
4688
4689 static void led_sysfs_set(struct led_classdev *led_cdev,
4690                         enum led_brightness brightness)
4691 {
4692         struct tpacpi_led_classdev *data = container_of(led_cdev,
4693                              struct tpacpi_led_classdev, led_classdev);
4694
4695         data->new_brightness = brightness;
4696         queue_work(tpacpi_wq, &data->work);
4697 }
4698
4699 static int led_sysfs_blink_set(struct led_classdev *led_cdev,
4700                         unsigned long *delay_on, unsigned long *delay_off)
4701 {
4702         struct tpacpi_led_classdev *data = container_of(led_cdev,
4703                              struct tpacpi_led_classdev, led_classdev);
4704
4705         /* Can we choose the flash rate? */
4706         if (*delay_on == 0 && *delay_off == 0) {
4707                 /* yes. set them to the hardware blink rate (1 Hz) */
4708                 *delay_on = 500; /* ms */
4709                 *delay_off = 500; /* ms */
4710         } else if ((*delay_on != 500) || (*delay_off != 500))
4711                 return -EINVAL;
4712
4713         data->new_brightness = TPACPI_LED_BLINK;
4714         queue_work(tpacpi_wq, &data->work);
4715
4716         return 0;
4717 }
4718
4719 static enum led_brightness led_sysfs_get(struct led_classdev *led_cdev)
4720 {
4721         int rc;
4722
4723         struct tpacpi_led_classdev *data = container_of(led_cdev,
4724                              struct tpacpi_led_classdev, led_classdev);
4725
4726         rc = led_get_status(data->led);
4727
4728         if (rc == TPACPI_LED_OFF || rc < 0)
4729                 rc = LED_OFF;   /* no error handling in led class :( */
4730         else
4731                 rc = LED_FULL;
4732
4733         return rc;
4734 }
4735
4736 static void led_exit(void)
4737 {
4738         unsigned int i;
4739
4740         for (i = 0; i < TPACPI_LED_NUMLEDS; i++) {
4741                 if (tpacpi_leds[i].led_classdev.name)
4742                         led_classdev_unregister(&tpacpi_leds[i].led_classdev);
4743         }
4744
4745         kfree(tpacpi_leds);
4746 }
4747
4748 static int __init led_init(struct ibm_init_struct *iibm)
4749 {
4750         unsigned int i;
4751         int rc;
4752
4753         vdbg_printk(TPACPI_DBG_INIT, "initializing LED subdriver\n");
4754
4755         TPACPI_ACPIHANDLE_INIT(led);
4756
4757         if (!led_handle)
4758                 /* led not supported on R30, R31 */
4759                 led_supported = TPACPI_LED_NONE;
4760         else if (strlencmp(led_path, "SLED") == 0)
4761                 /* 570 */
4762                 led_supported = TPACPI_LED_570;
4763         else if (strlencmp(led_path, "SYSL") == 0)
4764                 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
4765                 led_supported = TPACPI_LED_OLD;
4766         else
4767                 /* all others */
4768                 led_supported = TPACPI_LED_NEW;
4769
4770         vdbg_printk(TPACPI_DBG_INIT, "LED commands are %s, mode %d\n",
4771                 str_supported(led_supported), led_supported);
4772
4773         tpacpi_leds = kzalloc(sizeof(*tpacpi_leds) * TPACPI_LED_NUMLEDS,
4774                               GFP_KERNEL);
4775         if (!tpacpi_leds) {
4776                 printk(TPACPI_ERR "Out of memory for LED data\n");
4777                 return -ENOMEM;
4778         }
4779
4780         for (i = 0; i < TPACPI_LED_NUMLEDS; i++) {
4781                 tpacpi_leds[i].led = i;
4782
4783                 tpacpi_leds[i].led_classdev.brightness_set = &led_sysfs_set;
4784                 tpacpi_leds[i].led_classdev.blink_set = &led_sysfs_blink_set;
4785                 if (led_supported == TPACPI_LED_570)
4786                         tpacpi_leds[i].led_classdev.brightness_get =
4787                                                         &led_sysfs_get;
4788
4789                 tpacpi_leds[i].led_classdev.name = tpacpi_led_names[i];
4790
4791                 INIT_WORK(&tpacpi_leds[i].work, led_set_status_worker);
4792
4793                 rc = led_classdev_register(&tpacpi_pdev->dev,
4794                                            &tpacpi_leds[i].led_classdev);
4795                 if (rc < 0) {
4796                         tpacpi_leds[i].led_classdev.name = NULL;
4797                         led_exit();
4798                         return rc;
4799                 }
4800         }
4801
4802         return (led_supported != TPACPI_LED_NONE)? 0 : 1;
4803 }
4804
4805 #define str_led_status(s) \
4806         ((s) == TPACPI_LED_OFF ? "off" : \
4807                 ((s) == TPACPI_LED_ON ? "on" : "blinking"))
4808
4809 static int led_read(char *p)
4810 {
4811         int len = 0;
4812
4813         if (!led_supported) {
4814                 len += sprintf(p + len, "status:\t\tnot supported\n");
4815                 return len;
4816         }
4817         len += sprintf(p + len, "status:\t\tsupported\n");
4818
4819         if (led_supported == TPACPI_LED_570) {
4820                 /* 570 */
4821                 int i, status;
4822                 for (i = 0; i < 8; i++) {
4823                         status = led_get_status(i);
4824                         if (status < 0)
4825                                 return -EIO;
4826                         len += sprintf(p + len, "%d:\t\t%s\n",
4827                                        i, str_led_status(status));
4828                 }
4829         }
4830
4831         len += sprintf(p + len, "commands:\t"
4832                        "<led> on, <led> off, <led> blink (<led> is 0-7)\n");
4833
4834         return len;
4835 }
4836
4837 static int led_write(char *buf)
4838 {
4839         char *cmd;
4840         int led, rc;
4841         enum led_status_t s;
4842
4843         if (!led_supported)
4844                 return -ENODEV;
4845
4846         while ((cmd = next_cmd(&buf))) {
4847                 if (sscanf(cmd, "%d", &led) != 1 || led < 0 || led > 7)
4848                         return -EINVAL;
4849
4850                 if (strstr(cmd, "off")) {
4851                         s = TPACPI_LED_OFF;
4852                 } else if (strstr(cmd, "on")) {
4853                         s = TPACPI_LED_ON;
4854                 } else if (strstr(cmd, "blink")) {
4855                         s = TPACPI_LED_BLINK;
4856                 } else {
4857                         return -EINVAL;
4858                 }
4859
4860                 rc = led_set_status(led, s);
4861                 if (rc < 0)
4862                         return rc;
4863         }
4864
4865         return 0;
4866 }
4867
4868 static struct ibm_struct led_driver_data = {
4869         .name = "led",
4870         .read = led_read,
4871         .write = led_write,
4872         .exit = led_exit,
4873 };
4874
4875 /*************************************************************************
4876  * Beep subdriver
4877  */
4878
4879 TPACPI_HANDLE(beep, ec, "BEEP");        /* all except R30, R31 */
4880
4881 static int __init beep_init(struct ibm_init_struct *iibm)
4882 {
4883         vdbg_printk(TPACPI_DBG_INIT, "initializing beep subdriver\n");
4884
4885         TPACPI_ACPIHANDLE_INIT(beep);
4886
4887         vdbg_printk(TPACPI_DBG_INIT, "beep is %s\n",
4888                 str_supported(beep_handle != NULL));
4889
4890         return (beep_handle)? 0 : 1;
4891 }
4892
4893 static int beep_read(char *p)
4894 {
4895         int len = 0;
4896
4897         if (!beep_handle)
4898                 len += sprintf(p + len, "status:\t\tnot supported\n");
4899         else {
4900                 len += sprintf(p + len, "status:\t\tsupported\n");
4901                 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-17)\n");
4902         }
4903
4904         return len;
4905 }
4906
4907 static int beep_write(char *buf)
4908 {
4909         char *cmd;
4910         int beep_cmd;
4911
4912         if (!beep_handle)
4913                 return -ENODEV;
4914
4915         while ((cmd = next_cmd(&buf))) {
4916                 if (sscanf(cmd, "%u", &beep_cmd) == 1 &&
4917                     beep_cmd >= 0 && beep_cmd <= 17) {
4918                         /* beep_cmd set */
4919                 } else
4920                         return -EINVAL;
4921                 if (!acpi_evalf(beep_handle, NULL, NULL, "vdd", beep_cmd, 0))
4922                         return -EIO;
4923         }
4924
4925         return 0;
4926 }
4927
4928 static struct ibm_struct beep_driver_data = {
4929         .name = "beep",
4930         .read = beep_read,
4931         .write = beep_write,
4932 };
4933
4934 /*************************************************************************
4935  * Thermal subdriver
4936  */
4937
4938 enum thermal_access_mode {
4939         TPACPI_THERMAL_NONE = 0,        /* No thermal support */
4940         TPACPI_THERMAL_ACPI_TMP07,      /* Use ACPI TMP0-7 */
4941         TPACPI_THERMAL_ACPI_UPDT,       /* Use ACPI TMP0-7 with UPDT */
4942         TPACPI_THERMAL_TPEC_8,          /* Use ACPI EC regs, 8 sensors */
4943         TPACPI_THERMAL_TPEC_16,         /* Use ACPI EC regs, 16 sensors */
4944 };
4945
4946 enum { /* TPACPI_THERMAL_TPEC_* */
4947         TP_EC_THERMAL_TMP0 = 0x78,      /* ACPI EC regs TMP 0..7 */
4948         TP_EC_THERMAL_TMP8 = 0xC0,      /* ACPI EC regs TMP 8..15 */
4949         TP_EC_THERMAL_TMP_NA = -128,    /* ACPI EC sensor not available */
4950 };
4951
4952 #define TPACPI_MAX_THERMAL_SENSORS 16   /* Max thermal sensors supported */
4953 struct ibm_thermal_sensors_struct {
4954         s32 temp[TPACPI_MAX_THERMAL_SENSORS];
4955 };
4956
4957 static enum thermal_access_mode thermal_read_mode;
4958
4959 /* idx is zero-based */
4960 static int thermal_get_sensor(int idx, s32 *value)
4961 {
4962         int t;
4963         s8 tmp;
4964         char tmpi[5];
4965
4966         t = TP_EC_THERMAL_TMP0;
4967
4968         switch (thermal_read_mode) {
4969 #if TPACPI_MAX_THERMAL_SENSORS >= 16
4970         case TPACPI_THERMAL_TPEC_16:
4971                 if (idx >= 8 && idx <= 15) {
4972                         t = TP_EC_THERMAL_TMP8;
4973                         idx -= 8;
4974                 }
4975                 /* fallthrough */
4976 #endif
4977         case TPACPI_THERMAL_TPEC_8:
4978                 if (idx <= 7) {
4979                         if (!acpi_ec_read(t + idx, &tmp))
4980                                 return -EIO;
4981                         *value = tmp * 1000;
4982                         return 0;
4983                 }
4984                 break;
4985
4986         case TPACPI_THERMAL_ACPI_UPDT:
4987                 if (idx <= 7) {
4988                         snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
4989                         if (!acpi_evalf(ec_handle, NULL, "UPDT", "v"))
4990                                 return -EIO;
4991                         if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
4992                                 return -EIO;
4993                         *value = (t - 2732) * 100;
4994                         return 0;
4995                 }
4996                 break;
4997
4998         case TPACPI_THERMAL_ACPI_TMP07:
4999                 if (idx <= 7) {
5000                         snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
5001                         if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
5002                                 return -EIO;
5003                         if (t > 127 || t < -127)
5004                                 t = TP_EC_THERMAL_TMP_NA;
5005                         *value = t * 1000;
5006                         return 0;
5007                 }
5008                 break;
5009
5010         case TPACPI_THERMAL_NONE:
5011         default:
5012                 return -ENOSYS;
5013         }
5014
5015         return -EINVAL;
5016 }
5017
5018 static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s)
5019 {
5020         int res, i;
5021         int n;
5022
5023         n = 8;
5024         i = 0;
5025
5026         if (!s)
5027                 return -EINVAL;
5028
5029         if (thermal_read_mode == TPACPI_THERMAL_TPEC_16)
5030                 n = 16;
5031
5032         for (i = 0 ; i < n; i++) {
5033                 res = thermal_get_sensor(i, &s->temp[i]);
5034                 if (res)
5035                         return res;
5036         }
5037
5038         return n;
5039 }
5040
5041 /* sysfs temp##_input -------------------------------------------------- */
5042
5043 static ssize_t thermal_temp_input_show(struct device *dev,
5044                            struct device_attribute *attr,
5045                            char *buf)
5046 {
5047         struct sensor_device_attribute *sensor_attr =
5048                                         to_sensor_dev_attr(attr);
5049         int idx = sensor_attr->index;
5050         s32 value;
5051         int res;
5052
5053         res = thermal_get_sensor(idx, &value);
5054         if (res)
5055                 return res;
5056         if (value == TP_EC_THERMAL_TMP_NA * 1000)
5057                 return -ENXIO;
5058
5059         return snprintf(buf, PAGE_SIZE, "%d\n", value);
5060 }
5061
5062 #define THERMAL_SENSOR_ATTR_TEMP(_idxA, _idxB) \
5063          SENSOR_ATTR(temp##_idxA##_input, S_IRUGO, \
5064                      thermal_temp_input_show, NULL, _idxB)
5065
5066 static struct sensor_device_attribute sensor_dev_attr_thermal_temp_input[] = {
5067         THERMAL_SENSOR_ATTR_TEMP(1, 0),
5068         THERMAL_SENSOR_ATTR_TEMP(2, 1),
5069         THERMAL_SENSOR_ATTR_TEMP(3, 2),
5070         THERMAL_SENSOR_ATTR_TEMP(4, 3),
5071         THERMAL_SENSOR_ATTR_TEMP(5, 4),
5072         THERMAL_SENSOR_ATTR_TEMP(6, 5),
5073         THERMAL_SENSOR_ATTR_TEMP(7, 6),
5074         THERMAL_SENSOR_ATTR_TEMP(8, 7),
5075         THERMAL_SENSOR_ATTR_TEMP(9, 8),
5076         THERMAL_SENSOR_ATTR_TEMP(10, 9),
5077         THERMAL_SENSOR_ATTR_TEMP(11, 10),
5078         THERMAL_SENSOR_ATTR_TEMP(12, 11),
5079         THERMAL_SENSOR_ATTR_TEMP(13, 12),
5080         THERMAL_SENSOR_ATTR_TEMP(14, 13),
5081         THERMAL_SENSOR_ATTR_TEMP(15, 14),
5082         THERMAL_SENSOR_ATTR_TEMP(16, 15),
5083 };
5084
5085 #define THERMAL_ATTRS(X) \
5086         &sensor_dev_attr_thermal_temp_input[X].dev_attr.attr
5087
5088 static struct attribute *thermal_temp_input_attr[] = {
5089         THERMAL_ATTRS(8),
5090         THERMAL_ATTRS(9),
5091         THERMAL_ATTRS(10),
5092         THERMAL_ATTRS(11),
5093         THERMAL_ATTRS(12),
5094         THERMAL_ATTRS(13),
5095         THERMAL_ATTRS(14),
5096         THERMAL_ATTRS(15),
5097         THERMAL_ATTRS(0),
5098         THERMAL_ATTRS(1),
5099         THERMAL_ATTRS(2),
5100         THERMAL_ATTRS(3),
5101         THERMAL_ATTRS(4),
5102         THERMAL_ATTRS(5),
5103         THERMAL_ATTRS(6),
5104         THERMAL_ATTRS(7),
5105         NULL
5106 };
5107
5108 static const struct attribute_group thermal_temp_input16_group = {
5109         .attrs = thermal_temp_input_attr
5110 };
5111
5112 static const struct attribute_group thermal_temp_input8_group = {
5113         .attrs = &thermal_temp_input_attr[8]
5114 };
5115
5116 #undef THERMAL_SENSOR_ATTR_TEMP
5117 #undef THERMAL_ATTRS
5118
5119 /* --------------------------------------------------------------------- */
5120
5121 static int __init thermal_init(struct ibm_init_struct *iibm)
5122 {
5123         u8 t, ta1, ta2;
5124         int i;
5125         int acpi_tmp7;
5126         int res;
5127
5128         vdbg_printk(TPACPI_DBG_INIT, "initializing thermal subdriver\n");
5129
5130         acpi_tmp7 = acpi_evalf(ec_handle, NULL, "TMP7", "qv");
5131
5132         if (thinkpad_id.ec_model) {
5133                 /*
5134                  * Direct EC access mode: sensors at registers
5135                  * 0x78-0x7F, 0xC0-0xC7.  Registers return 0x00 for
5136                  * non-implemented, thermal sensors return 0x80 when
5137                  * not available
5138                  */
5139
5140                 ta1 = ta2 = 0;
5141                 for (i = 0; i < 8; i++) {
5142                         if (acpi_ec_read(TP_EC_THERMAL_TMP0 + i, &t)) {
5143                                 ta1 |= t;
5144                         } else {
5145                                 ta1 = 0;
5146                                 break;
5147                         }
5148                         if (acpi_ec_read(TP_EC_THERMAL_TMP8 + i, &t)) {
5149                                 ta2 |= t;
5150                         } else {
5151                                 ta1 = 0;
5152                                 break;
5153                         }
5154                 }
5155                 if (ta1 == 0) {
5156                         /* This is sheer paranoia, but we handle it anyway */
5157                         if (acpi_tmp7) {
5158                                 printk(TPACPI_ERR
5159                                        "ThinkPad ACPI EC access misbehaving, "
5160                                        "falling back to ACPI TMPx access "
5161                                        "mode\n");
5162                                 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
5163                         } else {
5164                                 printk(TPACPI_ERR
5165                                        "ThinkPad ACPI EC access misbehaving, "
5166                                        "disabling thermal sensors access\n");
5167                                 thermal_read_mode = TPACPI_THERMAL_NONE;
5168                         }
5169                 } else {
5170                         thermal_read_mode =
5171                             (ta2 != 0) ?
5172                             TPACPI_THERMAL_TPEC_16 : TPACPI_THERMAL_TPEC_8;
5173                 }
5174         } else if (acpi_tmp7) {
5175                 if (acpi_evalf(ec_handle, NULL, "UPDT", "qv")) {
5176                         /* 600e/x, 770e, 770x */
5177                         thermal_read_mode = TPACPI_THERMAL_ACPI_UPDT;
5178                 } else {
5179                         /* Standard ACPI TMPx access, max 8 sensors */
5180                         thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
5181                 }
5182         } else {
5183                 /* temperatures not supported on 570, G4x, R30, R31, R32 */
5184                 thermal_read_mode = TPACPI_THERMAL_NONE;
5185         }
5186
5187         vdbg_printk(TPACPI_DBG_INIT, "thermal is %s, mode %d\n",
5188                 str_supported(thermal_read_mode != TPACPI_THERMAL_NONE),
5189                 thermal_read_mode);
5190
5191         switch (thermal_read_mode) {
5192         case TPACPI_THERMAL_TPEC_16:
5193                 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
5194                                 &thermal_temp_input16_group);
5195                 if (res)
5196                         return res;
5197                 break;
5198         case TPACPI_THERMAL_TPEC_8:
5199         case TPACPI_THERMAL_ACPI_TMP07:
5200         case TPACPI_THERMAL_ACPI_UPDT:
5201                 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
5202                                 &thermal_temp_input8_group);
5203                 if (res)
5204                         return res;
5205                 break;
5206         case TPACPI_THERMAL_NONE:
5207         default:
5208                 return 1;
5209         }
5210
5211         return 0;
5212 }
5213
5214 static void thermal_exit(void)
5215 {
5216         switch (thermal_read_mode) {
5217         case TPACPI_THERMAL_TPEC_16:
5218                 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
5219                                    &thermal_temp_input16_group);
5220                 break;
5221         case TPACPI_THERMAL_TPEC_8:
5222         case TPACPI_THERMAL_ACPI_TMP07:
5223         case TPACPI_THERMAL_ACPI_UPDT:
5224                 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
5225                                    &thermal_temp_input16_group);
5226                 break;
5227         case TPACPI_THERMAL_NONE:
5228         default:
5229                 break;
5230         }
5231 }
5232
5233 static int thermal_read(char *p)
5234 {
5235         int len = 0;
5236         int n, i;
5237         struct ibm_thermal_sensors_struct t;
5238
5239         n = thermal_get_sensors(&t);
5240         if (unlikely(n < 0))
5241                 return n;
5242
5243         len += sprintf(p + len, "temperatures:\t");
5244
5245         if (n > 0) {
5246                 for (i = 0; i < (n - 1); i++)
5247                         len += sprintf(p + len, "%d ", t.temp[i] / 1000);
5248                 len += sprintf(p + len, "%d\n", t.temp[i] / 1000);
5249         } else
5250                 len += sprintf(p + len, "not supported\n");
5251
5252         return len;
5253 }
5254
5255 static struct ibm_struct thermal_driver_data = {
5256         .name = "thermal",
5257         .read = thermal_read,
5258         .exit = thermal_exit,
5259 };
5260
5261 /*************************************************************************
5262  * EC Dump subdriver
5263  */
5264
5265 static u8 ecdump_regs[256];
5266
5267 static int ecdump_read(char *p)
5268 {
5269         int len = 0;
5270         int i, j;
5271         u8 v;
5272
5273         len += sprintf(p + len, "EC      "
5274                        " +00 +01 +02 +03 +04 +05 +06 +07"
5275                        " +08 +09 +0a +0b +0c +0d +0e +0f\n");
5276         for (i = 0; i < 256; i += 16) {
5277                 len += sprintf(p + len, "EC 0x%02x:", i);
5278                 for (j = 0; j < 16; j++) {
5279                         if (!acpi_ec_read(i + j, &v))
5280                                 break;
5281                         if (v != ecdump_regs[i + j])
5282                                 len += sprintf(p + len, " *%02x", v);
5283                         else
5284                                 len += sprintf(p + len, "  %02x", v);
5285                         ecdump_regs[i + j] = v;
5286                 }
5287                 len += sprintf(p + len, "\n");
5288                 if (j != 16)
5289                         break;
5290         }
5291
5292         /* These are way too dangerous to advertise openly... */
5293 #if 0
5294         len += sprintf(p + len, "commands:\t0x<offset> 0x<value>"
5295                        " (<offset> is 00-ff, <value> is 00-ff)\n");
5296         len += sprintf(p + len, "commands:\t0x<offset> <value>  "
5297                        " (<offset> is 00-ff, <value> is 0-255)\n");
5298 #endif
5299         return len;
5300 }
5301
5302 static int ecdump_write(char *buf)
5303 {
5304         char *cmd;
5305         int i, v;
5306
5307         while ((cmd = next_cmd(&buf))) {
5308                 if (sscanf(cmd, "0x%x 0x%x", &i, &v) == 2) {
5309                         /* i and v set */
5310                 } else if (sscanf(cmd, "0x%x %u", &i, &v) == 2) {
5311                         /* i and v set */
5312                 } else
5313                         return -EINVAL;
5314                 if (i >= 0 && i < 256 && v >= 0 && v < 256) {
5315                         if (!acpi_ec_write(i, v))
5316                                 return -EIO;
5317                 } else
5318                         return -EINVAL;
5319         }
5320
5321         return 0;
5322 }
5323
5324 static struct ibm_struct ecdump_driver_data = {
5325         .name = "ecdump",
5326         .read = ecdump_read,
5327         .write = ecdump_write,
5328         .flags.experimental = 1,
5329 };
5330
5331 /*************************************************************************
5332  * Backlight/brightness subdriver
5333  */
5334
5335 #define TPACPI_BACKLIGHT_DEV_NAME "thinkpad_screen"
5336
5337 enum {
5338         TP_EC_BACKLIGHT = 0x31,
5339
5340         /* TP_EC_BACKLIGHT bitmasks */
5341         TP_EC_BACKLIGHT_LVLMSK = 0x1F,
5342         TP_EC_BACKLIGHT_CMDMSK = 0xE0,
5343         TP_EC_BACKLIGHT_MAPSW = 0x20,
5344 };
5345
5346 static struct backlight_device *ibm_backlight_device;
5347 static int brightness_mode;
5348 static unsigned int brightness_enable = 2; /* 2 = auto, 0 = no, 1 = yes */
5349
5350 static struct mutex brightness_mutex;
5351
5352 /*
5353  * ThinkPads can read brightness from two places: EC 0x31, or
5354  * CMOS NVRAM byte 0x5E, bits 0-3.
5355  *
5356  * EC 0x31 has the following layout
5357  *   Bit 7: unknown function
5358  *   Bit 6: unknown function
5359  *   Bit 5: Z: honour scale changes, NZ: ignore scale changes
5360  *   Bit 4: must be set to zero to avoid problems
5361  *   Bit 3-0: backlight brightness level
5362  *
5363  * brightness_get_raw returns status data in the EC 0x31 layout
5364  */
5365 static int brightness_get_raw(int *status)
5366 {
5367         u8 lec = 0, lcmos = 0, level = 0;
5368
5369         if (brightness_mode & 1) {
5370                 if (!acpi_ec_read(TP_EC_BACKLIGHT, &lec))
5371                         return -EIO;
5372                 level = lec & TP_EC_BACKLIGHT_LVLMSK;
5373         };
5374         if (brightness_mode & 2) {
5375                 lcmos = (nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS)
5376                          & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
5377                         >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
5378                 lcmos &= (tp_features.bright_16levels)? 0x0f : 0x07;
5379                 level = lcmos;
5380         }
5381
5382         if (brightness_mode == 3) {
5383                 *status = lec;  /* Prefer EC, CMOS is just a backing store */
5384                 lec &= TP_EC_BACKLIGHT_LVLMSK;
5385                 if (lec == lcmos)
5386                         tp_warned.bright_cmos_ec_unsync = 0;
5387                 else {
5388                         if (!tp_warned.bright_cmos_ec_unsync) {
5389                                 printk(TPACPI_ERR
5390                                         "CMOS NVRAM (%u) and EC (%u) do not "
5391                                         "agree on display brightness level\n",
5392                                         (unsigned int) lcmos,
5393                                         (unsigned int) lec);
5394                                 tp_warned.bright_cmos_ec_unsync = 1;
5395                         }
5396                         return -EIO;
5397                 }
5398         } else {
5399                 *status = level;
5400         }
5401
5402         return 0;
5403 }
5404
5405 /* May return EINTR which can always be mapped to ERESTARTSYS */
5406 static int brightness_set(int value)
5407 {
5408         int cmos_cmd, inc, i, res;
5409         int current_value;
5410         int command_bits;
5411
5412         if (value > ((tp_features.bright_16levels)? 15 : 7) ||
5413             value < 0)
5414                 return -EINVAL;
5415
5416         res = mutex_lock_killable(&brightness_mutex);
5417         if (res < 0)
5418                 return res;
5419
5420         res = brightness_get_raw(&current_value);
5421         if (res < 0)
5422                 goto errout;
5423
5424         command_bits = current_value & TP_EC_BACKLIGHT_CMDMSK;
5425         current_value &= TP_EC_BACKLIGHT_LVLMSK;
5426
5427         cmos_cmd = value > current_value ?
5428                         TP_CMOS_BRIGHTNESS_UP :
5429                         TP_CMOS_BRIGHTNESS_DOWN;
5430         inc = (value > current_value)? 1 : -1;
5431
5432         res = 0;
5433         for (i = current_value; i != value; i += inc) {
5434                 if ((brightness_mode & 2) &&
5435                     issue_thinkpad_cmos_command(cmos_cmd)) {
5436                         res = -EIO;
5437                         goto errout;
5438                 }
5439                 if ((brightness_mode & 1) &&
5440                     !acpi_ec_write(TP_EC_BACKLIGHT,
5441                                    (i + inc) | command_bits)) {
5442                         res = -EIO;
5443                         goto errout;;
5444                 }
5445         }
5446
5447 errout:
5448         mutex_unlock(&brightness_mutex);
5449         return res;
5450 }
5451
5452 /* sysfs backlight class ----------------------------------------------- */
5453
5454 static int brightness_update_status(struct backlight_device *bd)
5455 {
5456         /* it is the backlight class's job (caller) to handle
5457          * EINTR and other errors properly */
5458         return brightness_set(
5459                 (bd->props.fb_blank == FB_BLANK_UNBLANK &&
5460                  bd->props.power == FB_BLANK_UNBLANK) ?
5461                                 bd->props.brightness : 0);
5462 }
5463
5464 static int brightness_get(struct backlight_device *bd)
5465 {
5466         int status, res;
5467
5468         res = brightness_get_raw(&status);
5469         if (res < 0)
5470                 return 0; /* FIXME: teach backlight about error handling */
5471
5472         return status & TP_EC_BACKLIGHT_LVLMSK;
5473 }
5474
5475 static struct backlight_ops ibm_backlight_data = {
5476         .get_brightness = brightness_get,
5477         .update_status  = brightness_update_status,
5478 };
5479
5480 /* --------------------------------------------------------------------- */
5481
5482 static int __init brightness_init(struct ibm_init_struct *iibm)
5483 {
5484         int b;
5485
5486         vdbg_printk(TPACPI_DBG_INIT, "initializing brightness subdriver\n");
5487
5488         mutex_init(&brightness_mutex);
5489
5490         /*
5491          * We always attempt to detect acpi support, so as to switch
5492          * Lenovo Vista BIOS to ACPI brightness mode even if we are not
5493          * going to publish a backlight interface
5494          */
5495         b = tpacpi_check_std_acpi_brightness_support();
5496         if (b > 0) {
5497
5498                 if (acpi_video_backlight_support()) {
5499                         if (brightness_enable > 1) {
5500                                 printk(TPACPI_NOTICE
5501                                        "Standard ACPI backlight interface "
5502                                        "available, not loading native one.\n");
5503                                 return 1;
5504                         } else if (brightness_enable == 1) {
5505                                 printk(TPACPI_NOTICE
5506                                        "Backlight control force enabled, even if standard "
5507                                        "ACPI backlight interface is available\n");
5508                         }
5509                 } else {
5510                         if (brightness_enable > 1) {
5511                                 printk(TPACPI_NOTICE
5512                                        "Standard ACPI backlight interface not "
5513                                        "available, thinkpad_acpi native "
5514                                        "brightness control enabled\n");
5515                         }
5516                 }
5517         }
5518
5519         if (!brightness_enable) {
5520                 dbg_printk(TPACPI_DBG_INIT,
5521                            "brightness support disabled by "
5522                            "module parameter\n");
5523                 return 1;
5524         }
5525
5526         if (b > 16) {
5527                 printk(TPACPI_ERR
5528                        "Unsupported brightness interface, "
5529                        "please contact %s\n", TPACPI_MAIL);
5530                 return 1;
5531         }
5532         if (b == 16)
5533                 tp_features.bright_16levels = 1;
5534
5535         if (!brightness_mode) {
5536                 if (thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO)
5537                         brightness_mode = 2;
5538                 else
5539                         brightness_mode = 3;
5540
5541                 dbg_printk(TPACPI_DBG_INIT, "selected brightness_mode=%d\n",
5542                         brightness_mode);
5543         }
5544
5545         if (brightness_mode > 3)
5546                 return -EINVAL;
5547
5548         if (brightness_get_raw(&b) < 0)
5549                 return 1;
5550
5551         if (tp_features.bright_16levels)
5552                 printk(TPACPI_INFO
5553                        "detected a 16-level brightness capable ThinkPad\n");
5554
5555         ibm_backlight_device = backlight_device_register(
5556                                         TPACPI_BACKLIGHT_DEV_NAME, NULL, NULL,
5557                                         &ibm_backlight_data);
5558         if (IS_ERR(ibm_backlight_device)) {
5559                 printk(TPACPI_ERR "Could not register backlight device\n");
5560                 return PTR_ERR(ibm_backlight_device);
5561         }
5562         vdbg_printk(TPACPI_DBG_INIT, "brightness is supported\n");
5563
5564         ibm_backlight_device->props.max_brightness =
5565                                 (tp_features.bright_16levels)? 15 : 7;
5566         ibm_backlight_device->props.brightness = b & TP_EC_BACKLIGHT_LVLMSK;
5567         backlight_update_status(ibm_backlight_device);
5568
5569         return 0;
5570 }
5571
5572 static void brightness_exit(void)
5573 {
5574         if (ibm_backlight_device) {
5575                 vdbg_printk(TPACPI_DBG_EXIT,
5576                             "calling backlight_device_unregister()\n");
5577                 backlight_device_unregister(ibm_backlight_device);
5578         }
5579 }
5580
5581 static int brightness_read(char *p)
5582 {
5583         int len = 0;
5584         int level;
5585
5586         level = brightness_get(NULL);
5587         if (level < 0) {
5588                 len += sprintf(p + len, "level:\t\tunreadable\n");
5589         } else {
5590                 len += sprintf(p + len, "level:\t\t%d\n", level);
5591                 len += sprintf(p + len, "commands:\tup, down\n");
5592                 len += sprintf(p + len, "commands:\tlevel <level>"
5593                                " (<level> is 0-%d)\n",
5594                                (tp_features.bright_16levels) ? 15 : 7);
5595         }
5596
5597         return len;
5598 }
5599
5600 static int brightness_write(char *buf)
5601 {
5602         int level;
5603         int rc;
5604         char *cmd;
5605         int max_level = (tp_features.bright_16levels) ? 15 : 7;
5606
5607         level = brightness_get(NULL);
5608         if (level < 0)
5609                 return level;
5610
5611         while ((cmd = next_cmd(&buf))) {
5612                 if (strlencmp(cmd, "up") == 0) {
5613                         if (level < max_level)
5614                                 level++;
5615                 } else if (strlencmp(cmd, "down") == 0) {
5616                         if (level > 0)
5617                                 level--;
5618                 } else if (sscanf(cmd, "level %d", &level) == 1 &&
5619                            level >= 0 && level <= max_level) {
5620                         /* new level set */
5621                 } else
5622                         return -EINVAL;
5623         }
5624
5625         /*
5626          * Now we know what the final level should be, so we try to set it.
5627          * Doing it this way makes the syscall restartable in case of EINTR
5628          */
5629         rc = brightness_set(level);
5630         return (rc == -EINTR)? ERESTARTSYS : rc;
5631 }
5632
5633 static struct ibm_struct brightness_driver_data = {
5634         .name = "brightness",
5635         .read = brightness_read,
5636         .write = brightness_write,
5637         .exit = brightness_exit,
5638 };
5639
5640 /*************************************************************************
5641  * Volume subdriver
5642  */
5643
5644 static int volume_offset = 0x30;
5645
5646 static int volume_read(char *p)
5647 {
5648         int len = 0;
5649         u8 level;
5650
5651         if (!acpi_ec_read(volume_offset, &level)) {
5652                 len += sprintf(p + len, "level:\t\tunreadable\n");
5653         } else {
5654                 len += sprintf(p + len, "level:\t\t%d\n", level & 0xf);
5655                 len += sprintf(p + len, "mute:\t\t%s\n", onoff(level, 6));
5656                 len += sprintf(p + len, "commands:\tup, down, mute\n");
5657                 len += sprintf(p + len, "commands:\tlevel <level>"
5658                                " (<level> is 0-15)\n");
5659         }
5660
5661         return len;
5662 }
5663
5664 static int volume_write(char *buf)
5665 {
5666         int cmos_cmd, inc, i;
5667         u8 level, mute;
5668         int new_level, new_mute;
5669         char *cmd;
5670
5671         while ((cmd = next_cmd(&buf))) {
5672                 if (!acpi_ec_read(volume_offset, &level))
5673                         return -EIO;
5674                 new_mute = mute = level & 0x40;
5675                 new_level = level = level & 0xf;
5676
5677                 if (strlencmp(cmd, "up") == 0) {
5678                         if (mute)
5679                                 new_mute = 0;
5680                         else
5681                                 new_level = level == 15 ? 15 : level + 1;
5682                 } else if (strlencmp(cmd, "down") == 0) {
5683                         if (mute)
5684                                 new_mute = 0;
5685                         else
5686                                 new_level = level == 0 ? 0 : level - 1;
5687                 } else if (sscanf(cmd, "level %d", &new_level) == 1 &&
5688                            new_level >= 0 && new_level <= 15) {
5689                         /* new_level set */
5690                 } else if (strlencmp(cmd, "mute") == 0) {
5691                         new_mute = 0x40;
5692                 } else
5693                         return -EINVAL;
5694
5695                 if (new_level != level) {
5696                         /* mute doesn't change */
5697
5698                         cmos_cmd = (new_level > level) ?
5699                                         TP_CMOS_VOLUME_UP : TP_CMOS_VOLUME_DOWN;
5700                         inc = new_level > level ? 1 : -1;
5701
5702                         if (mute && (issue_thinkpad_cmos_command(cmos_cmd) ||
5703                                      !acpi_ec_write(volume_offset, level)))
5704                                 return -EIO;
5705
5706                         for (i = level; i != new_level; i += inc)
5707                                 if (issue_thinkpad_cmos_command(cmos_cmd) ||
5708                                     !acpi_ec_write(volume_offset, i + inc))
5709                                         return -EIO;
5710
5711                         if (mute &&
5712                             (issue_thinkpad_cmos_command(TP_CMOS_VOLUME_MUTE) ||
5713                              !acpi_ec_write(volume_offset, new_level + mute))) {
5714                                 return -EIO;
5715                         }
5716                 }
5717
5718                 if (new_mute != mute) {
5719                         /* level doesn't change */
5720
5721                         cmos_cmd = (new_mute) ?
5722                                    TP_CMOS_VOLUME_MUTE : TP_CMOS_VOLUME_UP;
5723
5724                         if (issue_thinkpad_cmos_command(cmos_cmd) ||
5725                             !acpi_ec_write(volume_offset, level + new_mute))
5726                                 return -EIO;
5727                 }
5728         }
5729
5730         return 0;
5731 }
5732
5733 static struct ibm_struct volume_driver_data = {
5734         .name = "volume",
5735         .read = volume_read,
5736         .write = volume_write,
5737 };
5738
5739 /*************************************************************************
5740  * Fan subdriver
5741  */
5742
5743 /*
5744  * FAN ACCESS MODES
5745  *
5746  * TPACPI_FAN_RD_ACPI_GFAN:
5747  *      ACPI GFAN method: returns fan level
5748  *
5749  *      see TPACPI_FAN_WR_ACPI_SFAN
5750  *      EC 0x2f (HFSP) not available if GFAN exists
5751  *
5752  * TPACPI_FAN_WR_ACPI_SFAN:
5753  *      ACPI SFAN method: sets fan level, 0 (stop) to 7 (max)
5754  *
5755  *      EC 0x2f (HFSP) might be available *for reading*, but do not use
5756  *      it for writing.
5757  *
5758  * TPACPI_FAN_WR_TPEC:
5759  *      ThinkPad EC register 0x2f (HFSP): fan control loop mode
5760  *      Supported on almost all ThinkPads
5761  *
5762  *      Fan speed changes of any sort (including those caused by the
5763  *      disengaged mode) are usually done slowly by the firmware as the
5764  *      maximum ammount of fan duty cycle change per second seems to be
5765  *      limited.
5766  *
5767  *      Reading is not available if GFAN exists.
5768  *      Writing is not available if SFAN exists.
5769  *
5770  *      Bits
5771  *       7      automatic mode engaged;
5772  *              (default operation mode of the ThinkPad)
5773  *              fan level is ignored in this mode.
5774  *       6      full speed mode (takes precedence over bit 7);
5775  *              not available on all thinkpads.  May disable
5776  *              the tachometer while the fan controller ramps up
5777  *              the speed (which can take up to a few *minutes*).
5778  *              Speeds up fan to 100% duty-cycle, which is far above
5779  *              the standard RPM levels.  It is not impossible that
5780  *              it could cause hardware damage.
5781  *      5-3     unused in some models.  Extra bits for fan level
5782  *              in others, but still useless as all values above
5783  *              7 map to the same speed as level 7 in these models.
5784  *      2-0     fan level (0..7 usually)
5785  *                      0x00 = stop
5786  *                      0x07 = max (set when temperatures critical)
5787  *              Some ThinkPads may have other levels, see
5788  *              TPACPI_FAN_WR_ACPI_FANS (X31/X40/X41)
5789  *
5790  *      FIRMWARE BUG: on some models, EC 0x2f might not be initialized at
5791  *      boot. Apparently the EC does not intialize it, so unless ACPI DSDT
5792  *      does so, its initial value is meaningless (0x07).
5793  *
5794  *      For firmware bugs, refer to:
5795  *      http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
5796  *
5797  *      ----
5798  *
5799  *      ThinkPad EC register 0x84 (LSB), 0x85 (MSB):
5800  *      Main fan tachometer reading (in RPM)
5801  *
5802  *      This register is present on all ThinkPads with a new-style EC, and
5803  *      it is known not to be present on the A21m/e, and T22, as there is
5804  *      something else in offset 0x84 according to the ACPI DSDT.  Other
5805  *      ThinkPads from this same time period (and earlier) probably lack the
5806  *      tachometer as well.
5807  *
5808  *      Unfortunately a lot of ThinkPads with new-style ECs but whose firwmare
5809  *      was never fixed by IBM to report the EC firmware version string
5810  *      probably support the tachometer (like the early X models), so
5811  *      detecting it is quite hard.  We need more data to know for sure.
5812  *
5813  *      FIRMWARE BUG: always read 0x84 first, otherwise incorrect readings
5814  *      might result.
5815  *
5816  *      FIRMWARE BUG: may go stale while the EC is switching to full speed
5817  *      mode.
5818  *
5819  *      For firmware bugs, refer to:
5820  *      http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
5821  *
5822  * TPACPI_FAN_WR_ACPI_FANS:
5823  *      ThinkPad X31, X40, X41.  Not available in the X60.
5824  *
5825  *      FANS ACPI handle: takes three arguments: low speed, medium speed,
5826  *      high speed.  ACPI DSDT seems to map these three speeds to levels
5827  *      as follows: STOP LOW LOW MED MED HIGH HIGH HIGH HIGH
5828  *      (this map is stored on FAN0..FAN8 as "0,1,1,2,2,3,3,3,3")
5829  *
5830  *      The speeds are stored on handles
5831  *      (FANA:FAN9), (FANC:FANB), (FANE:FAND).
5832  *
5833  *      There are three default speed sets, acessible as handles:
5834  *      FS1L,FS1M,FS1H; FS2L,FS2M,FS2H; FS3L,FS3M,FS3H
5835  *
5836  *      ACPI DSDT switches which set is in use depending on various
5837  *      factors.
5838  *
5839  *      TPACPI_FAN_WR_TPEC is also available and should be used to
5840  *      command the fan.  The X31/X40/X41 seems to have 8 fan levels,
5841  *      but the ACPI tables just mention level 7.
5842  */
5843
5844 enum {                                  /* Fan control constants */
5845         fan_status_offset = 0x2f,       /* EC register 0x2f */
5846         fan_rpm_offset = 0x84,          /* EC register 0x84: LSB, 0x85 MSB (RPM)
5847                                          * 0x84 must be read before 0x85 */
5848
5849         TP_EC_FAN_FULLSPEED = 0x40,     /* EC fan mode: full speed */
5850         TP_EC_FAN_AUTO      = 0x80,     /* EC fan mode: auto fan control */
5851
5852         TPACPI_FAN_LAST_LEVEL = 0x100,  /* Use cached last-seen fan level */
5853 };
5854
5855 enum fan_status_access_mode {
5856         TPACPI_FAN_NONE = 0,            /* No fan status or control */
5857         TPACPI_FAN_RD_ACPI_GFAN,        /* Use ACPI GFAN */
5858         TPACPI_FAN_RD_TPEC,             /* Use ACPI EC regs 0x2f, 0x84-0x85 */
5859 };
5860
5861 enum fan_control_access_mode {
5862         TPACPI_FAN_WR_NONE = 0,         /* No fan control */
5863         TPACPI_FAN_WR_ACPI_SFAN,        /* Use ACPI SFAN */
5864         TPACPI_FAN_WR_TPEC,             /* Use ACPI EC reg 0x2f */
5865         TPACPI_FAN_WR_ACPI_FANS,        /* Use ACPI FANS and EC reg 0x2f */
5866 };
5867
5868 enum fan_control_commands {
5869         TPACPI_FAN_CMD_SPEED    = 0x0001,       /* speed command */
5870         TPACPI_FAN_CMD_LEVEL    = 0x0002,       /* level command  */
5871         TPACPI_FAN_CMD_ENABLE   = 0x0004,       /* enable/disable cmd,
5872                                                  * and also watchdog cmd */
5873 };
5874
5875 static int fan_control_allowed;
5876
5877 static enum fan_status_access_mode fan_status_access_mode;
5878 static enum fan_control_access_mode fan_control_access_mode;
5879 static enum fan_control_commands fan_control_commands;
5880
5881 static u8 fan_control_initial_status;
5882 static u8 fan_control_desired_level;
5883 static u8 fan_control_resume_level;
5884 static int fan_watchdog_maxinterval;
5885
5886 static struct mutex fan_mutex;
5887
5888 static void fan_watchdog_fire(struct work_struct *ignored);
5889 static DECLARE_DELAYED_WORK(fan_watchdog_task, fan_watchdog_fire);
5890
5891 TPACPI_HANDLE(fans, ec, "FANS");        /* X31, X40, X41 */
5892 TPACPI_HANDLE(gfan, ec, "GFAN", /* 570 */
5893            "\\FSPD",            /* 600e/x, 770e, 770x */
5894            );                   /* all others */
5895 TPACPI_HANDLE(sfan, ec, "SFAN", /* 570 */
5896            "JFNS",              /* 770x-JL */
5897            );                   /* all others */
5898
5899 /*
5900  * Call with fan_mutex held
5901  */
5902 static void fan_update_desired_level(u8 status)
5903 {
5904         if ((status &
5905              (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
5906                 if (status > 7)
5907                         fan_control_desired_level = 7;
5908                 else
5909                         fan_control_desired_level = status;
5910         }
5911 }
5912
5913 static int fan_get_status(u8 *status)
5914 {
5915         u8 s;
5916
5917         /* TODO:
5918          * Add TPACPI_FAN_RD_ACPI_FANS ? */
5919
5920         switch (fan_status_access_mode) {
5921         case TPACPI_FAN_RD_ACPI_GFAN:
5922                 /* 570, 600e/x, 770e, 770x */
5923
5924                 if (unlikely(!acpi_evalf(gfan_handle, &s, NULL, "d")))
5925                         return -EIO;
5926
5927                 if (likely(status))
5928                         *status = s & 0x07;
5929
5930                 break;
5931
5932         case TPACPI_FAN_RD_TPEC:
5933                 /* all except 570, 600e/x, 770e, 770x */
5934                 if (unlikely(!acpi_ec_read(fan_status_offset, &s)))
5935                         return -EIO;
5936
5937                 if (likely(status))
5938                         *status = s;
5939
5940                 break;
5941
5942         default:
5943                 return -ENXIO;
5944         }
5945
5946         return 0;
5947 }
5948
5949 static int fan_get_status_safe(u8 *status)
5950 {
5951         int rc;
5952         u8 s;
5953
5954         if (mutex_lock_killable(&fan_mutex))
5955                 return -ERESTARTSYS;
5956         rc = fan_get_status(&s);
5957         if (!rc)
5958                 fan_update_desired_level(s);
5959         mutex_unlock(&fan_mutex);
5960
5961         if (status)
5962                 *status = s;
5963
5964         return rc;
5965 }
5966
5967 static int fan_get_speed(unsigned int *speed)
5968 {
5969         u8 hi, lo;
5970
5971         switch (fan_status_access_mode) {
5972         case TPACPI_FAN_RD_TPEC:
5973                 /* all except 570, 600e/x, 770e, 770x */
5974                 if (unlikely(!acpi_ec_read(fan_rpm_offset, &lo) ||
5975                              !acpi_ec_read(fan_rpm_offset + 1, &hi)))
5976                         return -EIO;
5977
5978                 if (likely(speed))
5979                         *speed = (hi << 8) | lo;
5980
5981                 break;
5982
5983         default:
5984                 return -ENXIO;
5985         }
5986
5987         return 0;
5988 }
5989
5990 static int fan_set_level(int level)
5991 {
5992         if (!fan_control_allowed)
5993                 return -EPERM;
5994
5995         switch (fan_control_access_mode) {
5996         case TPACPI_FAN_WR_ACPI_SFAN:
5997                 if (level >= 0 && level <= 7) {
5998                         if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", level))
5999                                 return -EIO;
6000                 } else
6001                         return -EINVAL;
6002                 break;
6003
6004         case TPACPI_FAN_WR_ACPI_FANS:
6005         case TPACPI_FAN_WR_TPEC:
6006                 if (!(level & TP_EC_FAN_AUTO) &&
6007                     !(level & TP_EC_FAN_FULLSPEED) &&
6008                     ((level < 0) || (level > 7)))
6009                         return -EINVAL;
6010
6011                 /* safety net should the EC not support AUTO
6012                  * or FULLSPEED mode bits and just ignore them */
6013                 if (level & TP_EC_FAN_FULLSPEED)
6014                         level |= 7;     /* safety min speed 7 */
6015                 else if (level & TP_EC_FAN_AUTO)
6016                         level |= 4;     /* safety min speed 4 */
6017
6018                 if (!acpi_ec_write(fan_status_offset, level))
6019                         return -EIO;
6020                 else
6021                         tp_features.fan_ctrl_status_undef = 0;
6022                 break;
6023
6024         default:
6025                 return -ENXIO;
6026         }
6027         return 0;
6028 }
6029
6030 static int fan_set_level_safe(int level)
6031 {
6032         int rc;
6033
6034         if (!fan_control_allowed)
6035                 return -EPERM;
6036
6037         if (mutex_lock_killable(&fan_mutex))
6038                 return -ERESTARTSYS;
6039
6040         if (level == TPACPI_FAN_LAST_LEVEL)
6041                 level = fan_control_desired_level;
6042
6043         rc = fan_set_level(level);
6044         if (!rc)
6045                 fan_update_desired_level(level);
6046
6047         mutex_unlock(&fan_mutex);
6048         return rc;
6049 }
6050
6051 static int fan_set_enable(void)
6052 {
6053         u8 s;
6054         int rc;
6055
6056         if (!fan_control_allowed)
6057                 return -EPERM;
6058
6059         if (mutex_lock_killable(&fan_mutex))
6060                 return -ERESTARTSYS;
6061
6062         switch (fan_control_access_mode) {
6063         case TPACPI_FAN_WR_ACPI_FANS:
6064         case TPACPI_FAN_WR_TPEC:
6065                 rc = fan_get_status(&s);
6066                 if (rc < 0)
6067                         break;
6068
6069                 /* Don't go out of emergency fan mode */
6070                 if (s != 7) {
6071                         s &= 0x07;
6072                         s |= TP_EC_FAN_AUTO | 4; /* min fan speed 4 */
6073                 }
6074
6075                 if (!acpi_ec_write(fan_status_offset, s))
6076                         rc = -EIO;
6077                 else {
6078                         tp_features.fan_ctrl_status_undef = 0;
6079                         rc = 0;
6080                 }
6081                 break;
6082
6083         case TPACPI_FAN_WR_ACPI_SFAN:
6084                 rc = fan_get_status(&s);
6085                 if (rc < 0)
6086                         break;
6087
6088                 s &= 0x07;
6089
6090                 /* Set fan to at least level 4 */
6091                 s |= 4;
6092
6093                 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", s))
6094                         rc = -EIO;
6095                 else
6096                         rc = 0;
6097                 break;
6098
6099         default:
6100                 rc = -ENXIO;
6101         }
6102
6103         mutex_unlock(&fan_mutex);
6104         return rc;
6105 }
6106
6107 static int fan_set_disable(void)
6108 {
6109         int rc;
6110
6111         if (!fan_control_allowed)
6112                 return -EPERM;
6113
6114         if (mutex_lock_killable(&fan_mutex))
6115                 return -ERESTARTSYS;
6116
6117         rc = 0;
6118         switch (fan_control_access_mode) {
6119         case TPACPI_FAN_WR_ACPI_FANS:
6120         case TPACPI_FAN_WR_TPEC:
6121                 if (!acpi_ec_write(fan_status_offset, 0x00))
6122                         rc = -EIO;
6123                 else {
6124                         fan_control_desired_level = 0;
6125                         tp_features.fan_ctrl_status_undef = 0;
6126                 }
6127                 break;
6128
6129         case TPACPI_FAN_WR_ACPI_SFAN:
6130                 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", 0x00))
6131                         rc = -EIO;
6132                 else
6133                         fan_control_desired_level = 0;
6134                 break;
6135
6136         default:
6137                 rc = -ENXIO;
6138         }
6139
6140
6141         mutex_unlock(&fan_mutex);
6142         return rc;
6143 }
6144
6145 static int fan_set_speed(int speed)
6146 {
6147         int rc;
6148
6149         if (!fan_control_allowed)
6150                 return -EPERM;
6151
6152         if (mutex_lock_killable(&fan_mutex))
6153                 return -ERESTARTSYS;
6154
6155         rc = 0;
6156         switch (fan_control_access_mode) {
6157         case TPACPI_FAN_WR_ACPI_FANS:
6158                 if (speed >= 0 && speed <= 65535) {
6159                         if (!acpi_evalf(fans_handle, NULL, NULL, "vddd",
6160                                         speed, speed, speed))
6161                                 rc = -EIO;
6162                 } else
6163                         rc = -EINVAL;
6164                 break;
6165
6166         default:
6167                 rc = -ENXIO;
6168         }
6169
6170         mutex_unlock(&fan_mutex);
6171         return rc;
6172 }
6173
6174 static void fan_watchdog_reset(void)
6175 {
6176         static int fan_watchdog_active;
6177
6178         if (fan_control_access_mode == TPACPI_FAN_WR_NONE)
6179                 return;
6180
6181         if (fan_watchdog_active)
6182                 cancel_delayed_work(&fan_watchdog_task);
6183
6184         if (fan_watchdog_maxinterval > 0 &&
6185             tpacpi_lifecycle != TPACPI_LIFE_EXITING) {
6186                 fan_watchdog_active = 1;
6187                 if (!queue_delayed_work(tpacpi_wq, &fan_watchdog_task,
6188                                 msecs_to_jiffies(fan_watchdog_maxinterval
6189                                                  * 1000))) {
6190                         printk(TPACPI_ERR
6191                                "failed to queue the fan watchdog, "
6192                                "watchdog will not trigger\n");
6193                 }
6194         } else
6195                 fan_watchdog_active = 0;
6196 }
6197
6198 static void fan_watchdog_fire(struct work_struct *ignored)
6199 {
6200         int rc;
6201
6202         if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
6203                 return;
6204
6205         printk(TPACPI_NOTICE "fan watchdog: enabling fan\n");
6206         rc = fan_set_enable();
6207         if (rc < 0) {
6208                 printk(TPACPI_ERR "fan watchdog: error %d while enabling fan, "
6209                         "will try again later...\n", -rc);
6210                 /* reschedule for later */
6211                 fan_watchdog_reset();
6212         }
6213 }
6214
6215 /*
6216  * SYSFS fan layout: hwmon compatible (device)
6217  *
6218  * pwm*_enable:
6219  *      0: "disengaged" mode
6220  *      1: manual mode
6221  *      2: native EC "auto" mode (recommended, hardware default)
6222  *
6223  * pwm*: set speed in manual mode, ignored otherwise.
6224  *      0 is level 0; 255 is level 7. Intermediate points done with linear
6225  *      interpolation.
6226  *
6227  * fan*_input: tachometer reading, RPM
6228  *
6229  *
6230  * SYSFS fan layout: extensions
6231  *
6232  * fan_watchdog (driver):
6233  *      fan watchdog interval in seconds, 0 disables (default), max 120
6234  */
6235
6236 /* sysfs fan pwm1_enable ----------------------------------------------- */
6237 static ssize_t fan_pwm1_enable_show(struct device *dev,
6238                                     struct device_attribute *attr,
6239                                     char *buf)
6240 {
6241         int res, mode;
6242         u8 status;
6243
6244         res = fan_get_status_safe(&status);
6245         if (res)
6246                 return res;
6247
6248         if (unlikely(tp_features.fan_ctrl_status_undef)) {
6249                 if (status != fan_control_initial_status) {
6250                         tp_features.fan_ctrl_status_undef = 0;
6251                 } else {
6252                         /* Return most likely status. In fact, it
6253                          * might be the only possible status */
6254                         status = TP_EC_FAN_AUTO;
6255                 }
6256         }
6257
6258         if (status & TP_EC_FAN_FULLSPEED) {
6259                 mode = 0;
6260         } else if (status & TP_EC_FAN_AUTO) {
6261                 mode = 2;
6262         } else
6263                 mode = 1;
6264
6265         return snprintf(buf, PAGE_SIZE, "%d\n", mode);
6266 }
6267
6268 static ssize_t fan_pwm1_enable_store(struct device *dev,
6269                                      struct device_attribute *attr,
6270                                      const char *buf, size_t count)
6271 {
6272         unsigned long t;
6273         int res, level;
6274
6275         if (parse_strtoul(buf, 2, &t))
6276                 return -EINVAL;
6277
6278         switch (t) {
6279         case 0:
6280                 level = TP_EC_FAN_FULLSPEED;
6281                 break;
6282         case 1:
6283                 level = TPACPI_FAN_LAST_LEVEL;
6284                 break;</