ACPI: thinkpad-acpi: bump up version to 0.20
[linux-3.10.git] / drivers / misc / 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 "0.20"
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 <asm/uaccess.h>
72
73 #include <linux/dmi.h>
74 #include <linux/jiffies.h>
75 #include <linux/workqueue.h>
76
77 #include <acpi/acpi_drivers.h>
78 #include <acpi/acnamesp.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
126 /****************************************************************************
127  * Main driver
128  */
129
130 #define TPACPI_NAME "thinkpad"
131 #define TPACPI_DESC "ThinkPad ACPI Extras"
132 #define TPACPI_FILE TPACPI_NAME "_acpi"
133 #define TPACPI_URL "http://ibm-acpi.sf.net/"
134 #define TPACPI_MAIL "ibm-acpi-devel@lists.sourceforge.net"
135
136 #define TPACPI_PROC_DIR "ibm"
137 #define TPACPI_ACPI_EVENT_PREFIX "ibm"
138 #define TPACPI_DRVR_NAME TPACPI_FILE
139 #define TPACPI_DRVR_SHORTNAME "tpacpi"
140 #define TPACPI_HWMON_DRVR_NAME TPACPI_NAME "_hwmon"
141
142 #define TPACPI_NVRAM_KTHREAD_NAME "ktpacpi_nvramd"
143 #define TPACPI_WORKQUEUE_NAME "ktpacpid"
144
145 #define TPACPI_MAX_ACPI_ARGS 3
146
147 /* Debugging */
148 #define TPACPI_LOG TPACPI_FILE ": "
149 #define TPACPI_ERR         KERN_ERR    TPACPI_LOG
150 #define TPACPI_NOTICE KERN_NOTICE TPACPI_LOG
151 #define TPACPI_INFO   KERN_INFO   TPACPI_LOG
152 #define TPACPI_DEBUG  KERN_DEBUG  TPACPI_LOG
153
154 #define TPACPI_DBG_ALL          0xffff
155 #define TPACPI_DBG_ALL          0xffff
156 #define TPACPI_DBG_INIT         0x0001
157 #define TPACPI_DBG_EXIT         0x0002
158 #define dbg_printk(a_dbg_level, format, arg...) \
159         do { if (dbg_level & a_dbg_level) \
160                 printk(TPACPI_DEBUG "%s: " format, __func__ , ## arg); \
161         } while (0)
162 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
163 #define vdbg_printk(a_dbg_level, format, arg...) \
164         dbg_printk(a_dbg_level, format, ## arg)
165 static const char *str_supported(int is_supported);
166 #else
167 #define vdbg_printk(a_dbg_level, format, arg...)
168 #endif
169
170 #define onoff(status, bit) ((status) & (1 << (bit)) ? "on" : "off")
171 #define enabled(status, bit) ((status) & (1 << (bit)) ? "enabled" : "disabled")
172 #define strlencmp(a, b) (strncmp((a), (b), strlen(b)))
173
174
175 /****************************************************************************
176  * Driver-wide structs and misc. variables
177  */
178
179 struct ibm_struct;
180
181 struct tp_acpi_drv_struct {
182         const struct acpi_device_id *hid;
183         struct acpi_driver *driver;
184
185         void (*notify) (struct ibm_struct *, u32);
186         acpi_handle *handle;
187         u32 type;
188         struct acpi_device *device;
189 };
190
191 struct ibm_struct {
192         char *name;
193
194         int (*read) (char *);
195         int (*write) (char *);
196         void (*exit) (void);
197         void (*resume) (void);
198         void (*suspend) (pm_message_t state);
199
200         struct list_head all_drivers;
201
202         struct tp_acpi_drv_struct *acpi;
203
204         struct {
205                 u8 acpi_driver_registered:1;
206                 u8 acpi_notify_installed:1;
207                 u8 proc_created:1;
208                 u8 init_called:1;
209                 u8 experimental:1;
210         } flags;
211 };
212
213 struct ibm_init_struct {
214         char param[32];
215
216         int (*init) (struct ibm_init_struct *);
217         struct ibm_struct *data;
218 };
219
220 static struct {
221 #ifdef CONFIG_THINKPAD_ACPI_BAY
222         u32 bay_status:1;
223         u32 bay_eject:1;
224         u32 bay_status2:1;
225         u32 bay_eject2:1;
226 #endif
227         u32 bluetooth:1;
228         u32 hotkey:1;
229         u32 hotkey_mask:1;
230         u32 hotkey_wlsw:1;
231         u32 hotkey_tablet:1;
232         u32 light:1;
233         u32 light_status:1;
234         u32 bright_16levels:1;
235         u32 bright_acpimode:1;
236         u32 wan:1;
237         u32 fan_ctrl_status_undef:1;
238         u32 input_device_registered:1;
239         u32 platform_drv_registered:1;
240         u32 platform_drv_attrs_registered:1;
241         u32 sensors_pdrv_registered:1;
242         u32 sensors_pdrv_attrs_registered:1;
243         u32 sensors_pdev_attrs_registered:1;
244         u32 hotkey_poll_active:1;
245 } tp_features;
246
247 static struct {
248         u16 hotkey_mask_ff:1;
249         u16 bright_cmos_ec_unsync:1;
250 } tp_warned;
251
252 struct thinkpad_id_data {
253         unsigned int vendor;    /* ThinkPad vendor:
254                                  * PCI_VENDOR_ID_IBM/PCI_VENDOR_ID_LENOVO */
255
256         char *bios_version_str; /* Something like 1ZET51WW (1.03z) */
257         char *ec_version_str;   /* Something like 1ZHT51WW-1.04a */
258
259         u16 bios_model;         /* Big Endian, TP-1Y = 0x5931, 0 = unknown */
260         u16 ec_model;
261
262         char *model_str;        /* ThinkPad T43 */
263         char *nummodel_str;     /* 9384A9C for a 9384-A9C model */
264 };
265 static struct thinkpad_id_data thinkpad_id;
266
267 static enum {
268         TPACPI_LIFE_INIT = 0,
269         TPACPI_LIFE_RUNNING,
270         TPACPI_LIFE_EXITING,
271 } tpacpi_lifecycle;
272
273 static int experimental;
274 static u32 dbg_level;
275
276 static struct workqueue_struct *tpacpi_wq;
277
278 /* Special LED class that can defer work */
279 struct tpacpi_led_classdev {
280         struct led_classdev led_classdev;
281         struct work_struct work;
282         enum led_brightness new_brightness;
283         unsigned int led;
284 };
285
286 /****************************************************************************
287  ****************************************************************************
288  *
289  * ACPI Helpers and device model
290  *
291  ****************************************************************************
292  ****************************************************************************/
293
294 /*************************************************************************
295  * ACPI basic handles
296  */
297
298 static acpi_handle root_handle;
299
300 #define TPACPI_HANDLE(object, parent, paths...)                 \
301         static acpi_handle  object##_handle;                    \
302         static acpi_handle *object##_parent = &parent##_handle; \
303         static char        *object##_path;                      \
304         static char        *object##_paths[] = { paths }
305
306 TPACPI_HANDLE(ec, root, "\\_SB.PCI0.ISA.EC0",   /* 240, 240x */
307            "\\_SB.PCI.ISA.EC",  /* 570 */
308            "\\_SB.PCI0.ISA0.EC0",       /* 600e/x, 770e, 770x */
309            "\\_SB.PCI0.ISA.EC", /* A21e, A2xm/p, T20-22, X20-21 */
310            "\\_SB.PCI0.AD4S.EC0",       /* i1400, R30 */
311            "\\_SB.PCI0.ICH3.EC0",       /* R31 */
312            "\\_SB.PCI0.LPC.EC", /* all others */
313            );
314
315 TPACPI_HANDLE(ecrd, ec, "ECRD");        /* 570 */
316 TPACPI_HANDLE(ecwr, ec, "ECWR");        /* 570 */
317
318 TPACPI_HANDLE(cmos, root, "\\UCMS",     /* R50, R50e, R50p, R51, */
319                                         /* T4x, X31, X40 */
320            "\\CMOS",            /* A3x, G4x, R32, T23, T30, X22-24, X30 */
321            "\\CMS",             /* R40, R40e */
322            );                   /* all others */
323
324 TPACPI_HANDLE(hkey, ec, "\\_SB.HKEY",   /* 600e/x, 770e, 770x */
325            "^HKEY",             /* R30, R31 */
326            "HKEY",              /* all others */
327            );                   /* 570 */
328
329 TPACPI_HANDLE(vid, root, "\\_SB.PCI.AGP.VGA",   /* 570 */
330            "\\_SB.PCI0.AGP0.VID0",      /* 600e/x, 770x */
331            "\\_SB.PCI0.VID0",   /* 770e */
332            "\\_SB.PCI0.VID",    /* A21e, G4x, R50e, X30, X40 */
333            "\\_SB.PCI0.AGP.VID",        /* all others */
334            );                           /* R30, R31 */
335
336
337 /*************************************************************************
338  * ACPI helpers
339  */
340
341 static int acpi_evalf(acpi_handle handle,
342                       void *res, char *method, char *fmt, ...)
343 {
344         char *fmt0 = fmt;
345         struct acpi_object_list params;
346         union acpi_object in_objs[TPACPI_MAX_ACPI_ARGS];
347         struct acpi_buffer result, *resultp;
348         union acpi_object out_obj;
349         acpi_status status;
350         va_list ap;
351         char res_type;
352         int success;
353         int quiet;
354
355         if (!*fmt) {
356                 printk(TPACPI_ERR "acpi_evalf() called with empty format\n");
357                 return 0;
358         }
359
360         if (*fmt == 'q') {
361                 quiet = 1;
362                 fmt++;
363         } else
364                 quiet = 0;
365
366         res_type = *(fmt++);
367
368         params.count = 0;
369         params.pointer = &in_objs[0];
370
371         va_start(ap, fmt);
372         while (*fmt) {
373                 char c = *(fmt++);
374                 switch (c) {
375                 case 'd':       /* int */
376                         in_objs[params.count].integer.value = va_arg(ap, int);
377                         in_objs[params.count++].type = ACPI_TYPE_INTEGER;
378                         break;
379                         /* add more types as needed */
380                 default:
381                         printk(TPACPI_ERR "acpi_evalf() called "
382                                "with invalid format character '%c'\n", c);
383                         return 0;
384                 }
385         }
386         va_end(ap);
387
388         if (res_type != 'v') {
389                 result.length = sizeof(out_obj);
390                 result.pointer = &out_obj;
391                 resultp = &result;
392         } else
393                 resultp = NULL;
394
395         status = acpi_evaluate_object(handle, method, &params, resultp);
396
397         switch (res_type) {
398         case 'd':               /* int */
399                 if (res)
400                         *(int *)res = out_obj.integer.value;
401                 success = status == AE_OK && out_obj.type == ACPI_TYPE_INTEGER;
402                 break;
403         case 'v':               /* void */
404                 success = status == AE_OK;
405                 break;
406                 /* add more types as needed */
407         default:
408                 printk(TPACPI_ERR "acpi_evalf() called "
409                        "with invalid format character '%c'\n", res_type);
410                 return 0;
411         }
412
413         if (!success && !quiet)
414                 printk(TPACPI_ERR "acpi_evalf(%s, %s, ...) failed: %d\n",
415                        method, fmt0, status);
416
417         return success;
418 }
419
420 static int acpi_ec_read(int i, u8 *p)
421 {
422         int v;
423
424         if (ecrd_handle) {
425                 if (!acpi_evalf(ecrd_handle, &v, NULL, "dd", i))
426                         return 0;
427                 *p = v;
428         } else {
429                 if (ec_read(i, p) < 0)
430                         return 0;
431         }
432
433         return 1;
434 }
435
436 static int acpi_ec_write(int i, u8 v)
437 {
438         if (ecwr_handle) {
439                 if (!acpi_evalf(ecwr_handle, NULL, NULL, "vdd", i, v))
440                         return 0;
441         } else {
442                 if (ec_write(i, v) < 0)
443                         return 0;
444         }
445
446         return 1;
447 }
448
449 #if defined(CONFIG_THINKPAD_ACPI_DOCK) || defined(CONFIG_THINKPAD_ACPI_BAY)
450 static int _sta(acpi_handle handle)
451 {
452         int status;
453
454         if (!handle || !acpi_evalf(handle, &status, "_STA", "d"))
455                 status = 0;
456
457         return status;
458 }
459 #endif
460
461 static int issue_thinkpad_cmos_command(int cmos_cmd)
462 {
463         if (!cmos_handle)
464                 return -ENXIO;
465
466         if (!acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd))
467                 return -EIO;
468
469         return 0;
470 }
471
472 /*************************************************************************
473  * ACPI device model
474  */
475
476 #define TPACPI_ACPIHANDLE_INIT(object) \
477         drv_acpi_handle_init(#object, &object##_handle, *object##_parent, \
478                 object##_paths, ARRAY_SIZE(object##_paths), &object##_path)
479
480 static void drv_acpi_handle_init(char *name,
481                            acpi_handle *handle, acpi_handle parent,
482                            char **paths, int num_paths, char **path)
483 {
484         int i;
485         acpi_status status;
486
487         vdbg_printk(TPACPI_DBG_INIT, "trying to locate ACPI handle for %s\n",
488                 name);
489
490         for (i = 0; i < num_paths; i++) {
491                 status = acpi_get_handle(parent, paths[i], handle);
492                 if (ACPI_SUCCESS(status)) {
493                         *path = paths[i];
494                         dbg_printk(TPACPI_DBG_INIT,
495                                    "Found ACPI handle %s for %s\n",
496                                    *path, name);
497                         return;
498                 }
499         }
500
501         vdbg_printk(TPACPI_DBG_INIT, "ACPI handle for %s not found\n",
502                     name);
503         *handle = NULL;
504 }
505
506 static void dispatch_acpi_notify(acpi_handle handle, u32 event, void *data)
507 {
508         struct ibm_struct *ibm = data;
509
510         if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
511                 return;
512
513         if (!ibm || !ibm->acpi || !ibm->acpi->notify)
514                 return;
515
516         ibm->acpi->notify(ibm, event);
517 }
518
519 static int __init setup_acpi_notify(struct ibm_struct *ibm)
520 {
521         acpi_status status;
522         int rc;
523
524         BUG_ON(!ibm->acpi);
525
526         if (!*ibm->acpi->handle)
527                 return 0;
528
529         vdbg_printk(TPACPI_DBG_INIT,
530                 "setting up ACPI notify for %s\n", ibm->name);
531
532         rc = acpi_bus_get_device(*ibm->acpi->handle, &ibm->acpi->device);
533         if (rc < 0) {
534                 printk(TPACPI_ERR "acpi_bus_get_device(%s) failed: %d\n",
535                         ibm->name, rc);
536                 return -ENODEV;
537         }
538
539         acpi_driver_data(ibm->acpi->device) = ibm;
540         sprintf(acpi_device_class(ibm->acpi->device), "%s/%s",
541                 TPACPI_ACPI_EVENT_PREFIX,
542                 ibm->name);
543
544         status = acpi_install_notify_handler(*ibm->acpi->handle,
545                         ibm->acpi->type, dispatch_acpi_notify, ibm);
546         if (ACPI_FAILURE(status)) {
547                 if (status == AE_ALREADY_EXISTS) {
548                         printk(TPACPI_NOTICE
549                                "another device driver is already "
550                                "handling %s events\n", ibm->name);
551                 } else {
552                         printk(TPACPI_ERR
553                                "acpi_install_notify_handler(%s) failed: %d\n",
554                                ibm->name, status);
555                 }
556                 return -ENODEV;
557         }
558         ibm->flags.acpi_notify_installed = 1;
559         return 0;
560 }
561
562 static int __init tpacpi_device_add(struct acpi_device *device)
563 {
564         return 0;
565 }
566
567 static int __init register_tpacpi_subdriver(struct ibm_struct *ibm)
568 {
569         int rc;
570
571         dbg_printk(TPACPI_DBG_INIT,
572                 "registering %s as an ACPI driver\n", ibm->name);
573
574         BUG_ON(!ibm->acpi);
575
576         ibm->acpi->driver = kzalloc(sizeof(struct acpi_driver), GFP_KERNEL);
577         if (!ibm->acpi->driver) {
578                 printk(TPACPI_ERR "kzalloc(ibm->driver) failed\n");
579                 return -ENOMEM;
580         }
581
582         sprintf(ibm->acpi->driver->name, "%s_%s", TPACPI_NAME, ibm->name);
583         ibm->acpi->driver->ids = ibm->acpi->hid;
584
585         ibm->acpi->driver->ops.add = &tpacpi_device_add;
586
587         rc = acpi_bus_register_driver(ibm->acpi->driver);
588         if (rc < 0) {
589                 printk(TPACPI_ERR "acpi_bus_register_driver(%s) failed: %d\n",
590                        ibm->name, rc);
591                 kfree(ibm->acpi->driver);
592                 ibm->acpi->driver = NULL;
593         } else if (!rc)
594                 ibm->flags.acpi_driver_registered = 1;
595
596         return rc;
597 }
598
599
600 /****************************************************************************
601  ****************************************************************************
602  *
603  * Procfs Helpers
604  *
605  ****************************************************************************
606  ****************************************************************************/
607
608 static int dispatch_procfs_read(char *page, char **start, off_t off,
609                         int count, int *eof, void *data)
610 {
611         struct ibm_struct *ibm = data;
612         int len;
613
614         if (!ibm || !ibm->read)
615                 return -EINVAL;
616
617         len = ibm->read(page);
618         if (len < 0)
619                 return len;
620
621         if (len <= off + count)
622                 *eof = 1;
623         *start = page + off;
624         len -= off;
625         if (len > count)
626                 len = count;
627         if (len < 0)
628                 len = 0;
629
630         return len;
631 }
632
633 static int dispatch_procfs_write(struct file *file,
634                         const char __user *userbuf,
635                         unsigned long count, void *data)
636 {
637         struct ibm_struct *ibm = data;
638         char *kernbuf;
639         int ret;
640
641         if (!ibm || !ibm->write)
642                 return -EINVAL;
643
644         kernbuf = kmalloc(count + 2, GFP_KERNEL);
645         if (!kernbuf)
646                 return -ENOMEM;
647
648         if (copy_from_user(kernbuf, userbuf, count)) {
649                 kfree(kernbuf);
650                 return -EFAULT;
651         }
652
653         kernbuf[count] = 0;
654         strcat(kernbuf, ",");
655         ret = ibm->write(kernbuf);
656         if (ret == 0)
657                 ret = count;
658
659         kfree(kernbuf);
660
661         return ret;
662 }
663
664 static char *next_cmd(char **cmds)
665 {
666         char *start = *cmds;
667         char *end;
668
669         while ((end = strchr(start, ',')) && end == start)
670                 start = end + 1;
671
672         if (!end)
673                 return NULL;
674
675         *end = 0;
676         *cmds = end + 1;
677         return start;
678 }
679
680
681 /****************************************************************************
682  ****************************************************************************
683  *
684  * Device model: input, hwmon and platform
685  *
686  ****************************************************************************
687  ****************************************************************************/
688
689 static struct platform_device *tpacpi_pdev;
690 static struct platform_device *tpacpi_sensors_pdev;
691 static struct device *tpacpi_hwmon;
692 static struct input_dev *tpacpi_inputdev;
693 static struct mutex tpacpi_inputdev_send_mutex;
694 static LIST_HEAD(tpacpi_all_drivers);
695
696 static int tpacpi_suspend_handler(struct platform_device *pdev,
697                                   pm_message_t state)
698 {
699         struct ibm_struct *ibm, *itmp;
700
701         list_for_each_entry_safe(ibm, itmp,
702                                  &tpacpi_all_drivers,
703                                  all_drivers) {
704                 if (ibm->suspend)
705                         (ibm->suspend)(state);
706         }
707
708         return 0;
709 }
710
711 static int tpacpi_resume_handler(struct platform_device *pdev)
712 {
713         struct ibm_struct *ibm, *itmp;
714
715         list_for_each_entry_safe(ibm, itmp,
716                                  &tpacpi_all_drivers,
717                                  all_drivers) {
718                 if (ibm->resume)
719                         (ibm->resume)();
720         }
721
722         return 0;
723 }
724
725 static struct platform_driver tpacpi_pdriver = {
726         .driver = {
727                 .name = TPACPI_DRVR_NAME,
728                 .owner = THIS_MODULE,
729         },
730         .suspend = tpacpi_suspend_handler,
731         .resume = tpacpi_resume_handler,
732 };
733
734 static struct platform_driver tpacpi_hwmon_pdriver = {
735         .driver = {
736                 .name = TPACPI_HWMON_DRVR_NAME,
737                 .owner = THIS_MODULE,
738         },
739 };
740
741 /*************************************************************************
742  * sysfs support helpers
743  */
744
745 struct attribute_set {
746         unsigned int members, max_members;
747         struct attribute_group group;
748 };
749
750 struct attribute_set_obj {
751         struct attribute_set s;
752         struct attribute *a;
753 } __attribute__((packed));
754
755 static struct attribute_set *create_attr_set(unsigned int max_members,
756                                                 const char *name)
757 {
758         struct attribute_set_obj *sobj;
759
760         if (max_members == 0)
761                 return NULL;
762
763         /* Allocates space for implicit NULL at the end too */
764         sobj = kzalloc(sizeof(struct attribute_set_obj) +
765                     max_members * sizeof(struct attribute *),
766                     GFP_KERNEL);
767         if (!sobj)
768                 return NULL;
769         sobj->s.max_members = max_members;
770         sobj->s.group.attrs = &sobj->a;
771         sobj->s.group.name = name;
772
773         return &sobj->s;
774 }
775
776 #define destroy_attr_set(_set) \
777         kfree(_set);
778
779 /* not multi-threaded safe, use it in a single thread per set */
780 static int add_to_attr_set(struct attribute_set *s, struct attribute *attr)
781 {
782         if (!s || !attr)
783                 return -EINVAL;
784
785         if (s->members >= s->max_members)
786                 return -ENOMEM;
787
788         s->group.attrs[s->members] = attr;
789         s->members++;
790
791         return 0;
792 }
793
794 static int add_many_to_attr_set(struct attribute_set *s,
795                         struct attribute **attr,
796                         unsigned int count)
797 {
798         int i, res;
799
800         for (i = 0; i < count; i++) {
801                 res = add_to_attr_set(s, attr[i]);
802                 if (res)
803                         return res;
804         }
805
806         return 0;
807 }
808
809 static void delete_attr_set(struct attribute_set *s, struct kobject *kobj)
810 {
811         sysfs_remove_group(kobj, &s->group);
812         destroy_attr_set(s);
813 }
814
815 #define register_attr_set_with_sysfs(_attr_set, _kobj) \
816         sysfs_create_group(_kobj, &_attr_set->group)
817
818 static int parse_strtoul(const char *buf,
819                 unsigned long max, unsigned long *value)
820 {
821         char *endp;
822
823         while (*buf && isspace(*buf))
824                 buf++;
825         *value = simple_strtoul(buf, &endp, 0);
826         while (*endp && isspace(*endp))
827                 endp++;
828         if (*endp || *value > max)
829                 return -EINVAL;
830
831         return 0;
832 }
833
834 static int __init tpacpi_query_bcl_levels(acpi_handle handle)
835 {
836         struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
837         union acpi_object *obj;
838         int rc;
839
840         if (ACPI_SUCCESS(acpi_evaluate_object(handle, NULL, NULL, &buffer))) {
841                 obj = (union acpi_object *)buffer.pointer;
842                 if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) {
843                         printk(TPACPI_ERR "Unknown _BCL data, "
844                                "please report this to %s\n", TPACPI_MAIL);
845                         rc = 0;
846                 } else {
847                         rc = obj->package.count;
848                 }
849         } else {
850                 return 0;
851         }
852
853         kfree(buffer.pointer);
854         return rc;
855 }
856
857 static acpi_status __init tpacpi_acpi_walk_find_bcl(acpi_handle handle,
858                                         u32 lvl, void *context, void **rv)
859 {
860         char name[ACPI_PATH_SEGMENT_LENGTH];
861         struct acpi_buffer buffer = { sizeof(name), &name };
862
863         if (ACPI_SUCCESS(acpi_get_name(handle, ACPI_SINGLE_NAME, &buffer)) &&
864             !strncmp("_BCL", name, sizeof(name) - 1)) {
865                 BUG_ON(!rv || !*rv);
866                 **(int **)rv = tpacpi_query_bcl_levels(handle);
867                 return AE_CTRL_TERMINATE;
868         } else {
869                 return AE_OK;
870         }
871 }
872
873 /*
874  * Returns 0 (no ACPI _BCL or _BCL invalid), or size of brightness map
875  */
876 static int __init tpacpi_check_std_acpi_brightness_support(void)
877 {
878         int status;
879         int bcl_levels = 0;
880         void *bcl_ptr = &bcl_levels;
881
882         if (!vid_handle) {
883                 TPACPI_ACPIHANDLE_INIT(vid);
884         }
885         if (!vid_handle)
886                 return 0;
887
888         /*
889          * Search for a _BCL method, and execute it.  This is safe on all
890          * ThinkPads, and as a side-effect, _BCL will place a Lenovo Vista
891          * BIOS in ACPI backlight control mode.  We do NOT have to care
892          * about calling the _BCL method in an enabled video device, any
893          * will do for our purposes.
894          */
895
896         status = acpi_walk_namespace(ACPI_TYPE_METHOD, vid_handle, 3,
897                                      tpacpi_acpi_walk_find_bcl, NULL,
898                                      &bcl_ptr);
899
900         if (ACPI_SUCCESS(status) && bcl_levels > 2) {
901                 tp_features.bright_acpimode = 1;
902                 return (bcl_levels - 2);
903         }
904
905         return 0;
906 }
907
908 /*************************************************************************
909  * thinkpad-acpi driver attributes
910  */
911
912 /* interface_version --------------------------------------------------- */
913 static ssize_t tpacpi_driver_interface_version_show(
914                                 struct device_driver *drv,
915                                 char *buf)
916 {
917         return snprintf(buf, PAGE_SIZE, "0x%08x\n", TPACPI_SYSFS_VERSION);
918 }
919
920 static DRIVER_ATTR(interface_version, S_IRUGO,
921                 tpacpi_driver_interface_version_show, NULL);
922
923 /* debug_level --------------------------------------------------------- */
924 static ssize_t tpacpi_driver_debug_show(struct device_driver *drv,
925                                                 char *buf)
926 {
927         return snprintf(buf, PAGE_SIZE, "0x%04x\n", dbg_level);
928 }
929
930 static ssize_t tpacpi_driver_debug_store(struct device_driver *drv,
931                                                 const char *buf, size_t count)
932 {
933         unsigned long t;
934
935         if (parse_strtoul(buf, 0xffff, &t))
936                 return -EINVAL;
937
938         dbg_level = t;
939
940         return count;
941 }
942
943 static DRIVER_ATTR(debug_level, S_IWUSR | S_IRUGO,
944                 tpacpi_driver_debug_show, tpacpi_driver_debug_store);
945
946 /* version ------------------------------------------------------------- */
947 static ssize_t tpacpi_driver_version_show(struct device_driver *drv,
948                                                 char *buf)
949 {
950         return snprintf(buf, PAGE_SIZE, "%s v%s\n",
951                         TPACPI_DESC, TPACPI_VERSION);
952 }
953
954 static DRIVER_ATTR(version, S_IRUGO,
955                 tpacpi_driver_version_show, NULL);
956
957 /* --------------------------------------------------------------------- */
958
959 static struct driver_attribute *tpacpi_driver_attributes[] = {
960         &driver_attr_debug_level, &driver_attr_version,
961         &driver_attr_interface_version,
962 };
963
964 static int __init tpacpi_create_driver_attributes(struct device_driver *drv)
965 {
966         int i, res;
967
968         i = 0;
969         res = 0;
970         while (!res && i < ARRAY_SIZE(tpacpi_driver_attributes)) {
971                 res = driver_create_file(drv, tpacpi_driver_attributes[i]);
972                 i++;
973         }
974
975         return res;
976 }
977
978 static void tpacpi_remove_driver_attributes(struct device_driver *drv)
979 {
980         int i;
981
982         for (i = 0; i < ARRAY_SIZE(tpacpi_driver_attributes); i++)
983                 driver_remove_file(drv, tpacpi_driver_attributes[i]);
984 }
985
986 /****************************************************************************
987  ****************************************************************************
988  *
989  * Subdrivers
990  *
991  ****************************************************************************
992  ****************************************************************************/
993
994 /*************************************************************************
995  * thinkpad-acpi init subdriver
996  */
997
998 static int __init thinkpad_acpi_driver_init(struct ibm_init_struct *iibm)
999 {
1000         printk(TPACPI_INFO "%s v%s\n", TPACPI_DESC, TPACPI_VERSION);
1001         printk(TPACPI_INFO "%s\n", TPACPI_URL);
1002
1003         printk(TPACPI_INFO "ThinkPad BIOS %s, EC %s\n",
1004                 (thinkpad_id.bios_version_str) ?
1005                         thinkpad_id.bios_version_str : "unknown",
1006                 (thinkpad_id.ec_version_str) ?
1007                         thinkpad_id.ec_version_str : "unknown");
1008
1009         if (thinkpad_id.vendor && thinkpad_id.model_str)
1010                 printk(TPACPI_INFO "%s %s, model %s\n",
1011                         (thinkpad_id.vendor == PCI_VENDOR_ID_IBM) ?
1012                                 "IBM" : ((thinkpad_id.vendor ==
1013                                                 PCI_VENDOR_ID_LENOVO) ?
1014                                         "Lenovo" : "Unknown vendor"),
1015                         thinkpad_id.model_str,
1016                         (thinkpad_id.nummodel_str) ?
1017                                 thinkpad_id.nummodel_str : "unknown");
1018
1019         return 0;
1020 }
1021
1022 static int thinkpad_acpi_driver_read(char *p)
1023 {
1024         int len = 0;
1025
1026         len += sprintf(p + len, "driver:\t\t%s\n", TPACPI_DESC);
1027         len += sprintf(p + len, "version:\t%s\n", TPACPI_VERSION);
1028
1029         return len;
1030 }
1031
1032 static struct ibm_struct thinkpad_acpi_driver_data = {
1033         .name = "driver",
1034         .read = thinkpad_acpi_driver_read,
1035 };
1036
1037 /*************************************************************************
1038  * Hotkey subdriver
1039  */
1040
1041 enum {  /* hot key scan codes (derived from ACPI DSDT) */
1042         TP_ACPI_HOTKEYSCAN_FNF1         = 0,
1043         TP_ACPI_HOTKEYSCAN_FNF2,
1044         TP_ACPI_HOTKEYSCAN_FNF3,
1045         TP_ACPI_HOTKEYSCAN_FNF4,
1046         TP_ACPI_HOTKEYSCAN_FNF5,
1047         TP_ACPI_HOTKEYSCAN_FNF6,
1048         TP_ACPI_HOTKEYSCAN_FNF7,
1049         TP_ACPI_HOTKEYSCAN_FNF8,
1050         TP_ACPI_HOTKEYSCAN_FNF9,
1051         TP_ACPI_HOTKEYSCAN_FNF10,
1052         TP_ACPI_HOTKEYSCAN_FNF11,
1053         TP_ACPI_HOTKEYSCAN_FNF12,
1054         TP_ACPI_HOTKEYSCAN_FNBACKSPACE,
1055         TP_ACPI_HOTKEYSCAN_FNINSERT,
1056         TP_ACPI_HOTKEYSCAN_FNDELETE,
1057         TP_ACPI_HOTKEYSCAN_FNHOME,
1058         TP_ACPI_HOTKEYSCAN_FNEND,
1059         TP_ACPI_HOTKEYSCAN_FNPAGEUP,
1060         TP_ACPI_HOTKEYSCAN_FNPAGEDOWN,
1061         TP_ACPI_HOTKEYSCAN_FNSPACE,
1062         TP_ACPI_HOTKEYSCAN_VOLUMEUP,
1063         TP_ACPI_HOTKEYSCAN_VOLUMEDOWN,
1064         TP_ACPI_HOTKEYSCAN_MUTE,
1065         TP_ACPI_HOTKEYSCAN_THINKPAD,
1066 };
1067
1068 enum {  /* Keys available through NVRAM polling */
1069         TPACPI_HKEY_NVRAM_KNOWN_MASK = 0x00fb88c0U,
1070         TPACPI_HKEY_NVRAM_GOOD_MASK  = 0x00fb8000U,
1071 };
1072
1073 enum {  /* Positions of some of the keys in hotkey masks */
1074         TP_ACPI_HKEY_DISPSWTCH_MASK     = 1 << TP_ACPI_HOTKEYSCAN_FNF7,
1075         TP_ACPI_HKEY_DISPXPAND_MASK     = 1 << TP_ACPI_HOTKEYSCAN_FNF8,
1076         TP_ACPI_HKEY_HIBERNATE_MASK     = 1 << TP_ACPI_HOTKEYSCAN_FNF12,
1077         TP_ACPI_HKEY_BRGHTUP_MASK       = 1 << TP_ACPI_HOTKEYSCAN_FNHOME,
1078         TP_ACPI_HKEY_BRGHTDWN_MASK      = 1 << TP_ACPI_HOTKEYSCAN_FNEND,
1079         TP_ACPI_HKEY_THNKLGHT_MASK      = 1 << TP_ACPI_HOTKEYSCAN_FNPAGEUP,
1080         TP_ACPI_HKEY_ZOOM_MASK          = 1 << TP_ACPI_HOTKEYSCAN_FNSPACE,
1081         TP_ACPI_HKEY_VOLUP_MASK         = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEUP,
1082         TP_ACPI_HKEY_VOLDWN_MASK        = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEDOWN,
1083         TP_ACPI_HKEY_MUTE_MASK          = 1 << TP_ACPI_HOTKEYSCAN_MUTE,
1084         TP_ACPI_HKEY_THINKPAD_MASK      = 1 << TP_ACPI_HOTKEYSCAN_THINKPAD,
1085 };
1086
1087 enum {  /* NVRAM to ACPI HKEY group map */
1088         TP_NVRAM_HKEY_GROUP_HK2         = TP_ACPI_HKEY_THINKPAD_MASK |
1089                                           TP_ACPI_HKEY_ZOOM_MASK |
1090                                           TP_ACPI_HKEY_DISPSWTCH_MASK |
1091                                           TP_ACPI_HKEY_HIBERNATE_MASK,
1092         TP_NVRAM_HKEY_GROUP_BRIGHTNESS  = TP_ACPI_HKEY_BRGHTUP_MASK |
1093                                           TP_ACPI_HKEY_BRGHTDWN_MASK,
1094         TP_NVRAM_HKEY_GROUP_VOLUME      = TP_ACPI_HKEY_VOLUP_MASK |
1095                                           TP_ACPI_HKEY_VOLDWN_MASK |
1096                                           TP_ACPI_HKEY_MUTE_MASK,
1097 };
1098
1099 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1100 struct tp_nvram_state {
1101        u16 thinkpad_toggle:1;
1102        u16 zoom_toggle:1;
1103        u16 display_toggle:1;
1104        u16 thinklight_toggle:1;
1105        u16 hibernate_toggle:1;
1106        u16 displayexp_toggle:1;
1107        u16 display_state:1;
1108        u16 brightness_toggle:1;
1109        u16 volume_toggle:1;
1110        u16 mute:1;
1111
1112        u8 brightness_level;
1113        u8 volume_level;
1114 };
1115
1116 static struct task_struct *tpacpi_hotkey_task;
1117 static u32 hotkey_source_mask;          /* bit mask 0=ACPI,1=NVRAM */
1118 static int hotkey_poll_freq = 10;       /* Hz */
1119 static struct mutex hotkey_thread_mutex;
1120 static struct mutex hotkey_thread_data_mutex;
1121 static unsigned int hotkey_config_change;
1122
1123 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1124
1125 #define hotkey_source_mask 0U
1126
1127 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1128
1129 static struct mutex hotkey_mutex;
1130
1131 static enum {   /* Reasons for waking up */
1132         TP_ACPI_WAKEUP_NONE = 0,        /* None or unknown */
1133         TP_ACPI_WAKEUP_BAYEJ,           /* Bay ejection request */
1134         TP_ACPI_WAKEUP_UNDOCK,          /* Undock request */
1135 } hotkey_wakeup_reason;
1136
1137 static int hotkey_autosleep_ack;
1138
1139 static int hotkey_orig_status;
1140 static u32 hotkey_orig_mask;
1141 static u32 hotkey_all_mask;
1142 static u32 hotkey_reserved_mask;
1143 static u32 hotkey_mask;
1144
1145 static unsigned int hotkey_report_mode;
1146
1147 static u16 *hotkey_keycode_map;
1148
1149 static struct attribute_set *hotkey_dev_attributes;
1150
1151 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1152 #define HOTKEY_CONFIG_CRITICAL_START \
1153         do { \
1154                 mutex_lock(&hotkey_thread_data_mutex); \
1155                 hotkey_config_change++; \
1156         } while (0);
1157 #define HOTKEY_CONFIG_CRITICAL_END \
1158         mutex_unlock(&hotkey_thread_data_mutex);
1159 #else
1160 #define HOTKEY_CONFIG_CRITICAL_START
1161 #define HOTKEY_CONFIG_CRITICAL_END
1162 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1163
1164 /* HKEY.MHKG() return bits */
1165 #define TP_HOTKEY_TABLET_MASK (1 << 3)
1166
1167 static int hotkey_get_wlsw(int *status)
1168 {
1169         if (!acpi_evalf(hkey_handle, status, "WLSW", "d"))
1170                 return -EIO;
1171         return 0;
1172 }
1173
1174 static int hotkey_get_tablet_mode(int *status)
1175 {
1176         int s;
1177
1178         if (!acpi_evalf(hkey_handle, &s, "MHKG", "d"))
1179                 return -EIO;
1180
1181         *status = ((s & TP_HOTKEY_TABLET_MASK) != 0);
1182         return 0;
1183 }
1184
1185 /*
1186  * Call with hotkey_mutex held
1187  */
1188 static int hotkey_mask_get(void)
1189 {
1190         u32 m = 0;
1191
1192         if (tp_features.hotkey_mask) {
1193                 if (!acpi_evalf(hkey_handle, &m, "DHKN", "d"))
1194                         return -EIO;
1195         }
1196         hotkey_mask = m | (hotkey_source_mask & hotkey_mask);
1197
1198         return 0;
1199 }
1200
1201 /*
1202  * Call with hotkey_mutex held
1203  */
1204 static int hotkey_mask_set(u32 mask)
1205 {
1206         int i;
1207         int rc = 0;
1208
1209         if (tp_features.hotkey_mask) {
1210                 if (!tp_warned.hotkey_mask_ff &&
1211                     (mask == 0xffff || mask == 0xffffff ||
1212                      mask == 0xffffffff)) {
1213                         tp_warned.hotkey_mask_ff = 1;
1214                         printk(TPACPI_NOTICE
1215                                "setting the hotkey mask to 0x%08x is likely "
1216                                "not the best way to go about it\n", mask);
1217                         printk(TPACPI_NOTICE
1218                                "please consider using the driver defaults, "
1219                                "and refer to up-to-date thinkpad-acpi "
1220                                "documentation\n");
1221                 }
1222
1223                 HOTKEY_CONFIG_CRITICAL_START
1224                 for (i = 0; i < 32; i++) {
1225                         u32 m = 1 << i;
1226                         /* enable in firmware mask only keys not in NVRAM
1227                          * mode, but enable the key in the cached hotkey_mask
1228                          * regardless of mode, or the key will end up
1229                          * disabled by hotkey_mask_get() */
1230                         if (!acpi_evalf(hkey_handle,
1231                                         NULL, "MHKM", "vdd", i + 1,
1232                                         !!((mask & ~hotkey_source_mask) & m))) {
1233                                 rc = -EIO;
1234                                 break;
1235                         } else {
1236                                 hotkey_mask = (hotkey_mask & ~m) | (mask & m);
1237                         }
1238                 }
1239                 HOTKEY_CONFIG_CRITICAL_END
1240
1241                 /* hotkey_mask_get must be called unconditionally below */
1242                 if (!hotkey_mask_get() && !rc &&
1243                     (hotkey_mask & ~hotkey_source_mask) !=
1244                      (mask & ~hotkey_source_mask)) {
1245                         printk(TPACPI_NOTICE
1246                                "requested hot key mask 0x%08x, but "
1247                                "firmware forced it to 0x%08x\n",
1248                                mask, hotkey_mask);
1249                 }
1250         } else {
1251 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1252                 HOTKEY_CONFIG_CRITICAL_START
1253                 hotkey_mask = mask & hotkey_source_mask;
1254                 HOTKEY_CONFIG_CRITICAL_END
1255                 hotkey_mask_get();
1256                 if (hotkey_mask != mask) {
1257                         printk(TPACPI_NOTICE
1258                                "requested hot key mask 0x%08x, "
1259                                "forced to 0x%08x (NVRAM poll mask is "
1260                                "0x%08x): no firmware mask support\n",
1261                                mask, hotkey_mask, hotkey_source_mask);
1262                 }
1263 #else
1264                 hotkey_mask_get();
1265                 rc = -ENXIO;
1266 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1267         }
1268
1269         return rc;
1270 }
1271
1272 static int hotkey_status_get(int *status)
1273 {
1274         if (!acpi_evalf(hkey_handle, status, "DHKC", "d"))
1275                 return -EIO;
1276
1277         return 0;
1278 }
1279
1280 static int hotkey_status_set(int status)
1281 {
1282         if (!acpi_evalf(hkey_handle, NULL, "MHKC", "vd", status))
1283                 return -EIO;
1284
1285         return 0;
1286 }
1287
1288 static void tpacpi_input_send_radiosw(void)
1289 {
1290         int wlsw;
1291
1292         if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&wlsw)) {
1293                 mutex_lock(&tpacpi_inputdev_send_mutex);
1294
1295                 input_report_switch(tpacpi_inputdev,
1296                                     SW_RADIO, !!wlsw);
1297                 input_sync(tpacpi_inputdev);
1298
1299                 mutex_unlock(&tpacpi_inputdev_send_mutex);
1300         }
1301 }
1302
1303 static void tpacpi_input_send_tabletsw(void)
1304 {
1305         int state;
1306
1307         if (tp_features.hotkey_tablet &&
1308             !hotkey_get_tablet_mode(&state)) {
1309                 mutex_lock(&tpacpi_inputdev_send_mutex);
1310
1311                 input_report_switch(tpacpi_inputdev,
1312                                     SW_TABLET_MODE, !!state);
1313                 input_sync(tpacpi_inputdev);
1314
1315                 mutex_unlock(&tpacpi_inputdev_send_mutex);
1316         }
1317 }
1318
1319 static void tpacpi_input_send_key(unsigned int scancode)
1320 {
1321         unsigned int keycode;
1322
1323         keycode = hotkey_keycode_map[scancode];
1324
1325         if (keycode != KEY_RESERVED) {
1326                 mutex_lock(&tpacpi_inputdev_send_mutex);
1327
1328                 input_report_key(tpacpi_inputdev, keycode, 1);
1329                 if (keycode == KEY_UNKNOWN)
1330                         input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN,
1331                                     scancode);
1332                 input_sync(tpacpi_inputdev);
1333
1334                 input_report_key(tpacpi_inputdev, keycode, 0);
1335                 if (keycode == KEY_UNKNOWN)
1336                         input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN,
1337                                     scancode);
1338                 input_sync(tpacpi_inputdev);
1339
1340                 mutex_unlock(&tpacpi_inputdev_send_mutex);
1341         }
1342 }
1343
1344 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1345 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver;
1346
1347 static void tpacpi_hotkey_send_key(unsigned int scancode)
1348 {
1349         tpacpi_input_send_key(scancode);
1350         if (hotkey_report_mode < 2) {
1351                 acpi_bus_generate_proc_event(ibm_hotkey_acpidriver.device,
1352                                                 0x80, 0x1001 + scancode);
1353         }
1354 }
1355
1356 static void hotkey_read_nvram(struct tp_nvram_state *n, u32 m)
1357 {
1358         u8 d;
1359
1360         if (m & TP_NVRAM_HKEY_GROUP_HK2) {
1361                 d = nvram_read_byte(TP_NVRAM_ADDR_HK2);
1362                 n->thinkpad_toggle = !!(d & TP_NVRAM_MASK_HKT_THINKPAD);
1363                 n->zoom_toggle = !!(d & TP_NVRAM_MASK_HKT_ZOOM);
1364                 n->display_toggle = !!(d & TP_NVRAM_MASK_HKT_DISPLAY);
1365                 n->hibernate_toggle = !!(d & TP_NVRAM_MASK_HKT_HIBERNATE);
1366         }
1367         if (m & TP_ACPI_HKEY_THNKLGHT_MASK) {
1368                 d = nvram_read_byte(TP_NVRAM_ADDR_THINKLIGHT);
1369                 n->thinklight_toggle = !!(d & TP_NVRAM_MASK_THINKLIGHT);
1370         }
1371         if (m & TP_ACPI_HKEY_DISPXPAND_MASK) {
1372                 d = nvram_read_byte(TP_NVRAM_ADDR_VIDEO);
1373                 n->displayexp_toggle =
1374                                 !!(d & TP_NVRAM_MASK_HKT_DISPEXPND);
1375         }
1376         if (m & TP_NVRAM_HKEY_GROUP_BRIGHTNESS) {
1377                 d = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS);
1378                 n->brightness_level = (d & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
1379                                 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
1380                 n->brightness_toggle =
1381                                 !!(d & TP_NVRAM_MASK_HKT_BRIGHTNESS);
1382         }
1383         if (m & TP_NVRAM_HKEY_GROUP_VOLUME) {
1384                 d = nvram_read_byte(TP_NVRAM_ADDR_MIXER);
1385                 n->volume_level = (d & TP_NVRAM_MASK_LEVEL_VOLUME)
1386                                 >> TP_NVRAM_POS_LEVEL_VOLUME;
1387                 n->mute = !!(d & TP_NVRAM_MASK_MUTE);
1388                 n->volume_toggle = !!(d & TP_NVRAM_MASK_HKT_VOLUME);
1389         }
1390 }
1391
1392 #define TPACPI_COMPARE_KEY(__scancode, __member) \
1393         do { \
1394                 if ((mask & (1 << __scancode)) && \
1395                     oldn->__member != newn->__member) \
1396                 tpacpi_hotkey_send_key(__scancode); \
1397         } while (0)
1398
1399 #define TPACPI_MAY_SEND_KEY(__scancode) \
1400         do { if (mask & (1 << __scancode)) \
1401                 tpacpi_hotkey_send_key(__scancode); } while (0)
1402
1403 static void hotkey_compare_and_issue_event(struct tp_nvram_state *oldn,
1404                                            struct tp_nvram_state *newn,
1405                                            u32 mask)
1406 {
1407         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_THINKPAD, thinkpad_toggle);
1408         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNSPACE, zoom_toggle);
1409         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF7, display_toggle);
1410         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF12, hibernate_toggle);
1411
1412         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNPAGEUP, thinklight_toggle);
1413
1414         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF8, displayexp_toggle);
1415
1416         /* handle volume */
1417         if (oldn->volume_toggle != newn->volume_toggle) {
1418                 if (oldn->mute != newn->mute) {
1419                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE);
1420                 }
1421                 if (oldn->volume_level > newn->volume_level) {
1422                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
1423                 } else if (oldn->volume_level < newn->volume_level) {
1424                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
1425                 } else if (oldn->mute == newn->mute) {
1426                         /* repeated key presses that didn't change state */
1427                         if (newn->mute) {
1428                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE);
1429                         } else if (newn->volume_level != 0) {
1430                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
1431                         } else {
1432                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
1433                         }
1434                 }
1435         }
1436
1437         /* handle brightness */
1438         if (oldn->brightness_toggle != newn->brightness_toggle) {
1439                 if (oldn->brightness_level < newn->brightness_level) {
1440                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
1441                 } else if (oldn->brightness_level > newn->brightness_level) {
1442                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
1443                 } else {
1444                         /* repeated key presses that didn't change state */
1445                         if (newn->brightness_level != 0) {
1446                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
1447                         } else {
1448                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
1449                         }
1450                 }
1451         }
1452 }
1453
1454 #undef TPACPI_COMPARE_KEY
1455 #undef TPACPI_MAY_SEND_KEY
1456
1457 static int hotkey_kthread(void *data)
1458 {
1459         struct tp_nvram_state s[2];
1460         u32 mask;
1461         unsigned int si, so;
1462         unsigned long t;
1463         unsigned int change_detector, must_reset;
1464
1465         mutex_lock(&hotkey_thread_mutex);
1466
1467         if (tpacpi_lifecycle == TPACPI_LIFE_EXITING)
1468                 goto exit;
1469
1470         set_freezable();
1471
1472         so = 0;
1473         si = 1;
1474         t = 0;
1475
1476         /* Initial state for compares */
1477         mutex_lock(&hotkey_thread_data_mutex);
1478         change_detector = hotkey_config_change;
1479         mask = hotkey_source_mask & hotkey_mask;
1480         mutex_unlock(&hotkey_thread_data_mutex);
1481         hotkey_read_nvram(&s[so], mask);
1482
1483         while (!kthread_should_stop() && hotkey_poll_freq) {
1484                 if (t == 0)
1485                         t = 1000/hotkey_poll_freq;
1486                 t = msleep_interruptible(t);
1487                 if (unlikely(kthread_should_stop()))
1488                         break;
1489                 must_reset = try_to_freeze();
1490                 if (t > 0 && !must_reset)
1491                         continue;
1492
1493                 mutex_lock(&hotkey_thread_data_mutex);
1494                 if (must_reset || hotkey_config_change != change_detector) {
1495                         /* forget old state on thaw or config change */
1496                         si = so;
1497                         t = 0;
1498                         change_detector = hotkey_config_change;
1499                 }
1500                 mask = hotkey_source_mask & hotkey_mask;
1501                 mutex_unlock(&hotkey_thread_data_mutex);
1502
1503                 if (likely(mask)) {
1504                         hotkey_read_nvram(&s[si], mask);
1505                         if (likely(si != so)) {
1506                                 hotkey_compare_and_issue_event(&s[so], &s[si],
1507                                                                 mask);
1508                         }
1509                 }
1510
1511                 so = si;
1512                 si ^= 1;
1513         }
1514
1515 exit:
1516         mutex_unlock(&hotkey_thread_mutex);
1517         return 0;
1518 }
1519
1520 static void hotkey_poll_stop_sync(void)
1521 {
1522         if (tpacpi_hotkey_task) {
1523                 if (frozen(tpacpi_hotkey_task) ||
1524                     freezing(tpacpi_hotkey_task))
1525                         thaw_process(tpacpi_hotkey_task);
1526
1527                 kthread_stop(tpacpi_hotkey_task);
1528                 tpacpi_hotkey_task = NULL;
1529                 mutex_lock(&hotkey_thread_mutex);
1530                 /* at this point, the thread did exit */
1531                 mutex_unlock(&hotkey_thread_mutex);
1532         }
1533 }
1534
1535 /* call with hotkey_mutex held */
1536 static void hotkey_poll_setup(int may_warn)
1537 {
1538         if ((hotkey_source_mask & hotkey_mask) != 0 &&
1539             hotkey_poll_freq > 0 &&
1540             (tpacpi_inputdev->users > 0 || hotkey_report_mode < 2)) {
1541                 if (!tpacpi_hotkey_task) {
1542                         tpacpi_hotkey_task = kthread_run(hotkey_kthread,
1543                                         NULL, TPACPI_NVRAM_KTHREAD_NAME);
1544                         if (IS_ERR(tpacpi_hotkey_task)) {
1545                                 tpacpi_hotkey_task = NULL;
1546                                 printk(TPACPI_ERR
1547                                        "could not create kernel thread "
1548                                        "for hotkey polling\n");
1549                         }
1550                 }
1551         } else {
1552                 hotkey_poll_stop_sync();
1553                 if (may_warn &&
1554                     hotkey_source_mask != 0 && hotkey_poll_freq == 0) {
1555                         printk(TPACPI_NOTICE
1556                                 "hot keys 0x%08x require polling, "
1557                                 "which is currently disabled\n",
1558                                 hotkey_source_mask);
1559                 }
1560         }
1561 }
1562
1563 static void hotkey_poll_setup_safe(int may_warn)
1564 {
1565         mutex_lock(&hotkey_mutex);
1566         hotkey_poll_setup(may_warn);
1567         mutex_unlock(&hotkey_mutex);
1568 }
1569
1570 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1571
1572 static void hotkey_poll_setup_safe(int __unused)
1573 {
1574 }
1575
1576 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1577
1578 static int hotkey_inputdev_open(struct input_dev *dev)
1579 {
1580         switch (tpacpi_lifecycle) {
1581         case TPACPI_LIFE_INIT:
1582                 /*
1583                  * hotkey_init will call hotkey_poll_setup_safe
1584                  * at the appropriate moment
1585                  */
1586                 return 0;
1587         case TPACPI_LIFE_EXITING:
1588                 return -EBUSY;
1589         case TPACPI_LIFE_RUNNING:
1590                 hotkey_poll_setup_safe(0);
1591                 return 0;
1592         }
1593
1594         /* Should only happen if tpacpi_lifecycle is corrupt */
1595         BUG();
1596         return -EBUSY;
1597 }
1598
1599 static void hotkey_inputdev_close(struct input_dev *dev)
1600 {
1601         /* disable hotkey polling when possible */
1602         if (tpacpi_lifecycle == TPACPI_LIFE_RUNNING)
1603                 hotkey_poll_setup_safe(0);
1604 }
1605
1606 /* sysfs hotkey enable ------------------------------------------------- */
1607 static ssize_t hotkey_enable_show(struct device *dev,
1608                            struct device_attribute *attr,
1609                            char *buf)
1610 {
1611         int res, status;
1612
1613         res = hotkey_status_get(&status);
1614         if (res)
1615                 return res;
1616
1617         return snprintf(buf, PAGE_SIZE, "%d\n", status);
1618 }
1619
1620 static ssize_t hotkey_enable_store(struct device *dev,
1621                             struct device_attribute *attr,
1622                             const char *buf, size_t count)
1623 {
1624         unsigned long t;
1625         int res;
1626
1627         if (parse_strtoul(buf, 1, &t))
1628                 return -EINVAL;
1629
1630         res = hotkey_status_set(t);
1631
1632         return (res) ? res : count;
1633 }
1634
1635 static struct device_attribute dev_attr_hotkey_enable =
1636         __ATTR(hotkey_enable, S_IWUSR | S_IRUGO,
1637                 hotkey_enable_show, hotkey_enable_store);
1638
1639 /* sysfs hotkey mask --------------------------------------------------- */
1640 static ssize_t hotkey_mask_show(struct device *dev,
1641                            struct device_attribute *attr,
1642                            char *buf)
1643 {
1644         int res;
1645
1646         if (mutex_lock_interruptible(&hotkey_mutex))
1647                 return -ERESTARTSYS;
1648         res = hotkey_mask_get();
1649         mutex_unlock(&hotkey_mutex);
1650
1651         return (res)?
1652                 res : snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_mask);
1653 }
1654
1655 static ssize_t hotkey_mask_store(struct device *dev,
1656                             struct device_attribute *attr,
1657                             const char *buf, size_t count)
1658 {
1659         unsigned long t;
1660         int res;
1661
1662         if (parse_strtoul(buf, 0xffffffffUL, &t))
1663                 return -EINVAL;
1664
1665         if (mutex_lock_interruptible(&hotkey_mutex))
1666                 return -ERESTARTSYS;
1667
1668         res = hotkey_mask_set(t);
1669
1670 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1671         hotkey_poll_setup(1);
1672 #endif
1673
1674         mutex_unlock(&hotkey_mutex);
1675
1676         return (res) ? res : count;
1677 }
1678
1679 static struct device_attribute dev_attr_hotkey_mask =
1680         __ATTR(hotkey_mask, S_IWUSR | S_IRUGO,
1681                 hotkey_mask_show, hotkey_mask_store);
1682
1683 /* sysfs hotkey bios_enabled ------------------------------------------- */
1684 static ssize_t hotkey_bios_enabled_show(struct device *dev,
1685                            struct device_attribute *attr,
1686                            char *buf)
1687 {
1688         return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_orig_status);
1689 }
1690
1691 static struct device_attribute dev_attr_hotkey_bios_enabled =
1692         __ATTR(hotkey_bios_enabled, S_IRUGO, hotkey_bios_enabled_show, NULL);
1693
1694 /* sysfs hotkey bios_mask ---------------------------------------------- */
1695 static ssize_t hotkey_bios_mask_show(struct device *dev,
1696                            struct device_attribute *attr,
1697                            char *buf)
1698 {
1699         return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_orig_mask);
1700 }
1701
1702 static struct device_attribute dev_attr_hotkey_bios_mask =
1703         __ATTR(hotkey_bios_mask, S_IRUGO, hotkey_bios_mask_show, NULL);
1704
1705 /* sysfs hotkey all_mask ----------------------------------------------- */
1706 static ssize_t hotkey_all_mask_show(struct device *dev,
1707                            struct device_attribute *attr,
1708                            char *buf)
1709 {
1710         return snprintf(buf, PAGE_SIZE, "0x%08x\n",
1711                                 hotkey_all_mask | hotkey_source_mask);
1712 }
1713
1714 static struct device_attribute dev_attr_hotkey_all_mask =
1715         __ATTR(hotkey_all_mask, S_IRUGO, hotkey_all_mask_show, NULL);
1716
1717 /* sysfs hotkey recommended_mask --------------------------------------- */
1718 static ssize_t hotkey_recommended_mask_show(struct device *dev,
1719                                             struct device_attribute *attr,
1720                                             char *buf)
1721 {
1722         return snprintf(buf, PAGE_SIZE, "0x%08x\n",
1723                         (hotkey_all_mask | hotkey_source_mask)
1724                         & ~hotkey_reserved_mask);
1725 }
1726
1727 static struct device_attribute dev_attr_hotkey_recommended_mask =
1728         __ATTR(hotkey_recommended_mask, S_IRUGO,
1729                 hotkey_recommended_mask_show, NULL);
1730
1731 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1732
1733 /* sysfs hotkey hotkey_source_mask ------------------------------------- */
1734 static ssize_t hotkey_source_mask_show(struct device *dev,
1735                            struct device_attribute *attr,
1736                            char *buf)
1737 {
1738         return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_source_mask);
1739 }
1740
1741 static ssize_t hotkey_source_mask_store(struct device *dev,
1742                             struct device_attribute *attr,
1743                             const char *buf, size_t count)
1744 {
1745         unsigned long t;
1746
1747         if (parse_strtoul(buf, 0xffffffffUL, &t) ||
1748                 ((t & ~TPACPI_HKEY_NVRAM_KNOWN_MASK) != 0))
1749                 return -EINVAL;
1750
1751         if (mutex_lock_interruptible(&hotkey_mutex))
1752                 return -ERESTARTSYS;
1753
1754         HOTKEY_CONFIG_CRITICAL_START
1755         hotkey_source_mask = t;
1756         HOTKEY_CONFIG_CRITICAL_END
1757
1758         hotkey_poll_setup(1);
1759
1760         mutex_unlock(&hotkey_mutex);
1761
1762         return count;
1763 }
1764
1765 static struct device_attribute dev_attr_hotkey_source_mask =
1766         __ATTR(hotkey_source_mask, S_IWUSR | S_IRUGO,
1767                 hotkey_source_mask_show, hotkey_source_mask_store);
1768
1769 /* sysfs hotkey hotkey_poll_freq --------------------------------------- */
1770 static ssize_t hotkey_poll_freq_show(struct device *dev,
1771                            struct device_attribute *attr,
1772                            char *buf)
1773 {
1774         return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_poll_freq);
1775 }
1776
1777 static ssize_t hotkey_poll_freq_store(struct device *dev,
1778                             struct device_attribute *attr,
1779                             const char *buf, size_t count)
1780 {
1781         unsigned long t;
1782
1783         if (parse_strtoul(buf, 25, &t))
1784                 return -EINVAL;
1785
1786         if (mutex_lock_interruptible(&hotkey_mutex))
1787                 return -ERESTARTSYS;
1788
1789         hotkey_poll_freq = t;
1790
1791         hotkey_poll_setup(1);
1792         mutex_unlock(&hotkey_mutex);
1793
1794         return count;
1795 }
1796
1797 static struct device_attribute dev_attr_hotkey_poll_freq =
1798         __ATTR(hotkey_poll_freq, S_IWUSR | S_IRUGO,
1799                 hotkey_poll_freq_show, hotkey_poll_freq_store);
1800
1801 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1802
1803 /* sysfs hotkey radio_sw (pollable) ------------------------------------ */
1804 static ssize_t hotkey_radio_sw_show(struct device *dev,
1805                            struct device_attribute *attr,
1806                            char *buf)
1807 {
1808         int res, s;
1809         res = hotkey_get_wlsw(&s);
1810         if (res < 0)
1811                 return res;
1812
1813         return snprintf(buf, PAGE_SIZE, "%d\n", !!s);
1814 }
1815
1816 static struct device_attribute dev_attr_hotkey_radio_sw =
1817         __ATTR(hotkey_radio_sw, S_IRUGO, hotkey_radio_sw_show, NULL);
1818
1819 static void hotkey_radio_sw_notify_change(void)
1820 {
1821         if (tp_features.hotkey_wlsw)
1822                 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
1823                              "hotkey_radio_sw");
1824 }
1825
1826 /* sysfs hotkey tablet mode (pollable) --------------------------------- */
1827 static ssize_t hotkey_tablet_mode_show(struct device *dev,
1828                            struct device_attribute *attr,
1829                            char *buf)
1830 {
1831         int res, s;
1832         res = hotkey_get_tablet_mode(&s);
1833         if (res < 0)
1834                 return res;
1835
1836         return snprintf(buf, PAGE_SIZE, "%d\n", !!s);
1837 }
1838
1839 static struct device_attribute dev_attr_hotkey_tablet_mode =
1840         __ATTR(hotkey_tablet_mode, S_IRUGO, hotkey_tablet_mode_show, NULL);
1841
1842 static void hotkey_tablet_mode_notify_change(void)
1843 {
1844         if (tp_features.hotkey_tablet)
1845                 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
1846                              "hotkey_tablet_mode");
1847 }
1848
1849 /* sysfs hotkey report_mode -------------------------------------------- */
1850 static ssize_t hotkey_report_mode_show(struct device *dev,
1851                            struct device_attribute *attr,
1852                            char *buf)
1853 {
1854         return snprintf(buf, PAGE_SIZE, "%d\n",
1855                 (hotkey_report_mode != 0) ? hotkey_report_mode : 1);
1856 }
1857
1858 static struct device_attribute dev_attr_hotkey_report_mode =
1859         __ATTR(hotkey_report_mode, S_IRUGO, hotkey_report_mode_show, NULL);
1860
1861 /* sysfs wakeup reason (pollable) -------------------------------------- */
1862 static ssize_t hotkey_wakeup_reason_show(struct device *dev,
1863                            struct device_attribute *attr,
1864                            char *buf)
1865 {
1866         return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_wakeup_reason);
1867 }
1868
1869 static struct device_attribute dev_attr_hotkey_wakeup_reason =
1870         __ATTR(wakeup_reason, S_IRUGO, hotkey_wakeup_reason_show, NULL);
1871
1872 static void hotkey_wakeup_reason_notify_change(void)
1873 {
1874         if (tp_features.hotkey_mask)
1875                 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
1876                              "wakeup_reason");
1877 }
1878
1879 /* sysfs wakeup hotunplug_complete (pollable) -------------------------- */
1880 static ssize_t hotkey_wakeup_hotunplug_complete_show(struct device *dev,
1881                            struct device_attribute *attr,
1882                            char *buf)
1883 {
1884         return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_autosleep_ack);
1885 }
1886
1887 static struct device_attribute dev_attr_hotkey_wakeup_hotunplug_complete =
1888         __ATTR(wakeup_hotunplug_complete, S_IRUGO,
1889                hotkey_wakeup_hotunplug_complete_show, NULL);
1890
1891 static void hotkey_wakeup_hotunplug_complete_notify_change(void)
1892 {
1893         if (tp_features.hotkey_mask)
1894                 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
1895                              "wakeup_hotunplug_complete");
1896 }
1897
1898 /* --------------------------------------------------------------------- */
1899
1900 static struct attribute *hotkey_attributes[] __initdata = {
1901         &dev_attr_hotkey_enable.attr,
1902         &dev_attr_hotkey_bios_enabled.attr,
1903         &dev_attr_hotkey_report_mode.attr,
1904 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1905         &dev_attr_hotkey_mask.attr,
1906         &dev_attr_hotkey_all_mask.attr,
1907         &dev_attr_hotkey_recommended_mask.attr,
1908         &dev_attr_hotkey_source_mask.attr,
1909         &dev_attr_hotkey_poll_freq.attr,
1910 #endif
1911 };
1912
1913 static struct attribute *hotkey_mask_attributes[] __initdata = {
1914         &dev_attr_hotkey_bios_mask.attr,
1915 #ifndef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1916         &dev_attr_hotkey_mask.attr,
1917         &dev_attr_hotkey_all_mask.attr,
1918         &dev_attr_hotkey_recommended_mask.attr,
1919 #endif
1920         &dev_attr_hotkey_wakeup_reason.attr,
1921         &dev_attr_hotkey_wakeup_hotunplug_complete.attr,
1922 };
1923
1924 static int __init hotkey_init(struct ibm_init_struct *iibm)
1925 {
1926         /* Requirements for changing the default keymaps:
1927          *
1928          * 1. Many of the keys are mapped to KEY_RESERVED for very
1929          *    good reasons.  Do not change them unless you have deep
1930          *    knowledge on the IBM and Lenovo ThinkPad firmware for
1931          *    the various ThinkPad models.  The driver behaves
1932          *    differently for KEY_RESERVED: such keys have their
1933          *    hot key mask *unset* in mask_recommended, and also
1934          *    in the initial hot key mask programmed into the
1935          *    firmware at driver load time, which means the firm-
1936          *    ware may react very differently if you change them to
1937          *    something else;
1938          *
1939          * 2. You must be subscribed to the linux-thinkpad and
1940          *    ibm-acpi-devel mailing lists, and you should read the
1941          *    list archives since 2007 if you want to change the
1942          *    keymaps.  This requirement exists so that you will
1943          *    know the past history of problems with the thinkpad-
1944          *    acpi driver keymaps, and also that you will be
1945          *    listening to any bug reports;
1946          *
1947          * 3. Do not send thinkpad-acpi specific patches directly to
1948          *    for merging, *ever*.  Send them to the linux-acpi
1949          *    mailinglist for comments.  Merging is to be done only
1950          *    through acpi-test and the ACPI maintainer.
1951          *
1952          * If the above is too much to ask, don't change the keymap.
1953          * Ask the thinkpad-acpi maintainer to do it, instead.
1954          */
1955         static u16 ibm_keycode_map[] __initdata = {
1956                 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
1957                 KEY_FN_F1,      KEY_FN_F2,      KEY_COFFEE,     KEY_SLEEP,
1958                 KEY_WLAN,       KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
1959                 KEY_FN_F9,      KEY_FN_F10,     KEY_FN_F11,     KEY_SUSPEND,
1960
1961                 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
1962                 KEY_UNKNOWN,    /* 0x0C: FN+BACKSPACE */
1963                 KEY_UNKNOWN,    /* 0x0D: FN+INSERT */
1964                 KEY_UNKNOWN,    /* 0x0E: FN+DELETE */
1965
1966                 /* brightness: firmware always reacts to them, unless
1967                  * X.org did some tricks in the radeon BIOS scratch
1968                  * registers of *some* models */
1969                 KEY_RESERVED,   /* 0x0F: FN+HOME (brightness up) */
1970                 KEY_RESERVED,   /* 0x10: FN+END (brightness down) */
1971
1972                 /* Thinklight: firmware always react to it */
1973                 KEY_RESERVED,   /* 0x11: FN+PGUP (thinklight toggle) */
1974
1975                 KEY_UNKNOWN,    /* 0x12: FN+PGDOWN */
1976                 KEY_ZOOM,       /* 0x13: FN+SPACE (zoom) */
1977
1978                 /* Volume: firmware always react to it and reprograms
1979                  * the built-in *extra* mixer.  Never map it to control
1980                  * another mixer by default. */
1981                 KEY_RESERVED,   /* 0x14: VOLUME UP */
1982                 KEY_RESERVED,   /* 0x15: VOLUME DOWN */
1983                 KEY_RESERVED,   /* 0x16: MUTE */
1984
1985                 KEY_VENDOR,     /* 0x17: Thinkpad/AccessIBM/Lenovo */
1986
1987                 /* (assignments unknown, please report if found) */
1988                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
1989                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
1990         };
1991         static u16 lenovo_keycode_map[] __initdata = {
1992                 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
1993                 KEY_FN_F1,      KEY_COFFEE,     KEY_BATTERY,    KEY_SLEEP,
1994                 KEY_WLAN,       KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
1995                 KEY_FN_F9,      KEY_FN_F10,     KEY_FN_F11,     KEY_SUSPEND,
1996
1997                 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
1998                 KEY_UNKNOWN,    /* 0x0C: FN+BACKSPACE */
1999                 KEY_UNKNOWN,    /* 0x0D: FN+INSERT */
2000                 KEY_UNKNOWN,    /* 0x0E: FN+DELETE */
2001
2002                 /* These either have to go through ACPI video, or
2003                  * act like in the IBM ThinkPads, so don't ever
2004                  * enable them by default */
2005                 KEY_RESERVED,   /* 0x0F: FN+HOME (brightness up) */
2006                 KEY_RESERVED,   /* 0x10: FN+END (brightness down) */
2007
2008                 KEY_RESERVED,   /* 0x11: FN+PGUP (thinklight toggle) */
2009
2010                 KEY_UNKNOWN,    /* 0x12: FN+PGDOWN */
2011                 KEY_ZOOM,       /* 0x13: FN+SPACE (zoom) */
2012
2013                 /* Volume: z60/z61, T60 (BIOS version?): firmware always
2014                  * react to it and reprograms the built-in *extra* mixer.
2015                  * Never map it to control another mixer by default.
2016                  *
2017                  * T60?, T61, R60?, R61: firmware and EC tries to send
2018                  * these over the regular keyboard, so these are no-ops,
2019                  * but there are still weird bugs re. MUTE, so do not
2020                  * change unless you get test reports from all Lenovo
2021                  * models.  May cause the BIOS to interfere with the
2022                  * HDA mixer.
2023                  */
2024                 KEY_RESERVED,   /* 0x14: VOLUME UP */
2025                 KEY_RESERVED,   /* 0x15: VOLUME DOWN */
2026                 KEY_RESERVED,   /* 0x16: MUTE */
2027
2028                 KEY_VENDOR,     /* 0x17: Thinkpad/AccessIBM/Lenovo */
2029
2030                 /* (assignments unknown, please report if found) */
2031                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
2032                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
2033         };
2034
2035 #define TPACPI_HOTKEY_MAP_LEN           ARRAY_SIZE(ibm_keycode_map)
2036 #define TPACPI_HOTKEY_MAP_SIZE          sizeof(ibm_keycode_map)
2037 #define TPACPI_HOTKEY_MAP_TYPESIZE      sizeof(ibm_keycode_map[0])
2038
2039         int res, i;
2040         int status;
2041         int hkeyv;
2042
2043         vdbg_printk(TPACPI_DBG_INIT, "initializing hotkey subdriver\n");
2044
2045         BUG_ON(!tpacpi_inputdev);
2046         BUG_ON(tpacpi_inputdev->open != NULL ||
2047                tpacpi_inputdev->close != NULL);
2048
2049         TPACPI_ACPIHANDLE_INIT(hkey);
2050         mutex_init(&hotkey_mutex);
2051
2052 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2053         mutex_init(&hotkey_thread_mutex);
2054         mutex_init(&hotkey_thread_data_mutex);
2055 #endif
2056
2057         /* hotkey not supported on 570 */
2058         tp_features.hotkey = hkey_handle != NULL;
2059
2060         vdbg_printk(TPACPI_DBG_INIT, "hotkeys are %s\n",
2061                 str_supported(tp_features.hotkey));
2062
2063         if (tp_features.hotkey) {
2064                 hotkey_dev_attributes = create_attr_set(13, NULL);
2065                 if (!hotkey_dev_attributes)
2066                         return -ENOMEM;
2067                 res = add_many_to_attr_set(hotkey_dev_attributes,
2068                                 hotkey_attributes,
2069                                 ARRAY_SIZE(hotkey_attributes));
2070                 if (res)
2071                         return res;
2072
2073                 /* mask not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
2074                    A30, R30, R31, T20-22, X20-21, X22-24.  Detected by checking
2075                    for HKEY interface version 0x100 */
2076                 if (acpi_evalf(hkey_handle, &hkeyv, "MHKV", "qd")) {
2077                         if ((hkeyv >> 8) != 1) {
2078                                 printk(TPACPI_ERR "unknown version of the "
2079                                        "HKEY interface: 0x%x\n", hkeyv);
2080                                 printk(TPACPI_ERR "please report this to %s\n",
2081                                        TPACPI_MAIL);
2082                         } else {
2083                                 /*
2084                                  * MHKV 0x100 in A31, R40, R40e,
2085                                  * T4x, X31, and later
2086                                  */
2087                                 tp_features.hotkey_mask = 1;
2088                         }
2089                 }
2090
2091                 vdbg_printk(TPACPI_DBG_INIT, "hotkey masks are %s\n",
2092                         str_supported(tp_features.hotkey_mask));
2093
2094                 if (tp_features.hotkey_mask) {
2095                         if (!acpi_evalf(hkey_handle, &hotkey_all_mask,
2096                                         "MHKA", "qd")) {
2097                                 printk(TPACPI_ERR
2098                                        "missing MHKA handler, "
2099                                        "please report this to %s\n",
2100                                        TPACPI_MAIL);
2101                                 /* FN+F12, FN+F4, FN+F3 */
2102                                 hotkey_all_mask = 0x080cU;
2103                         }
2104                 }
2105
2106                 /* hotkey_source_mask *must* be zero for
2107                  * the first hotkey_mask_get */
2108                 res = hotkey_status_get(&hotkey_orig_status);
2109                 if (!res && tp_features.hotkey_mask) {
2110                         res = hotkey_mask_get();
2111                         hotkey_orig_mask = hotkey_mask;
2112                         if (!res) {
2113                                 res = add_many_to_attr_set(
2114                                         hotkey_dev_attributes,
2115                                         hotkey_mask_attributes,
2116                                         ARRAY_SIZE(hotkey_mask_attributes));
2117                         }
2118                 }
2119
2120 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2121                 if (tp_features.hotkey_mask) {
2122                         hotkey_source_mask = TPACPI_HKEY_NVRAM_GOOD_MASK
2123                                                 & ~hotkey_all_mask;
2124                 } else {
2125                         hotkey_source_mask = TPACPI_HKEY_NVRAM_GOOD_MASK;
2126                 }
2127
2128                 vdbg_printk(TPACPI_DBG_INIT,
2129                             "hotkey source mask 0x%08x, polling freq %d\n",
2130                             hotkey_source_mask, hotkey_poll_freq);
2131 #endif
2132
2133                 /* Not all thinkpads have a hardware radio switch */
2134                 if (!res && acpi_evalf(hkey_handle, &status, "WLSW", "qd")) {
2135                         tp_features.hotkey_wlsw = 1;
2136                         printk(TPACPI_INFO
2137                                 "radio switch found; radios are %s\n",
2138                                 enabled(status, 0));
2139                         res = add_to_attr_set(hotkey_dev_attributes,
2140                                         &dev_attr_hotkey_radio_sw.attr);
2141                 }
2142
2143                 /* For X41t, X60t, X61t Tablets... */
2144                 if (!res && acpi_evalf(hkey_handle, &status, "MHKG", "qd")) {
2145                         tp_features.hotkey_tablet = 1;
2146                         printk(TPACPI_INFO
2147                                 "possible tablet mode switch found; "
2148                                 "ThinkPad in %s mode\n",
2149                                 (status & TP_HOTKEY_TABLET_MASK)?
2150                                         "tablet" : "laptop");
2151                         res = add_to_attr_set(hotkey_dev_attributes,
2152                                         &dev_attr_hotkey_tablet_mode.attr);
2153                 }
2154
2155                 if (!res)
2156                         res = register_attr_set_with_sysfs(
2157                                         hotkey_dev_attributes,
2158                                         &tpacpi_pdev->dev.kobj);
2159                 if (res)
2160                         return res;
2161
2162                 /* Set up key map */
2163
2164                 hotkey_keycode_map = kmalloc(TPACPI_HOTKEY_MAP_SIZE,
2165                                                 GFP_KERNEL);
2166                 if (!hotkey_keycode_map) {
2167                         printk(TPACPI_ERR
2168                                 "failed to allocate memory for key map\n");
2169                         return -ENOMEM;
2170                 }
2171
2172                 if (thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO) {
2173                         dbg_printk(TPACPI_DBG_INIT,
2174                                    "using Lenovo default hot key map\n");
2175                         memcpy(hotkey_keycode_map, &lenovo_keycode_map,
2176                                 TPACPI_HOTKEY_MAP_SIZE);
2177                 } else {
2178                         dbg_printk(TPACPI_DBG_INIT,
2179                                    "using IBM default hot key map\n");
2180                         memcpy(hotkey_keycode_map, &ibm_keycode_map,
2181                                 TPACPI_HOTKEY_MAP_SIZE);
2182                 }
2183
2184                 set_bit(EV_KEY, tpacpi_inputdev->evbit);
2185                 set_bit(EV_MSC, tpacpi_inputdev->evbit);
2186                 set_bit(MSC_SCAN, tpacpi_inputdev->mscbit);
2187                 tpacpi_inputdev->keycodesize = TPACPI_HOTKEY_MAP_TYPESIZE;
2188                 tpacpi_inputdev->keycodemax = TPACPI_HOTKEY_MAP_LEN;
2189                 tpacpi_inputdev->keycode = hotkey_keycode_map;
2190                 for (i = 0; i < TPACPI_HOTKEY_MAP_LEN; i++) {
2191                         if (hotkey_keycode_map[i] != KEY_RESERVED) {
2192                                 set_bit(hotkey_keycode_map[i],
2193                                         tpacpi_inputdev->keybit);
2194                         } else {
2195                                 if (i < sizeof(hotkey_reserved_mask)*8)
2196                                         hotkey_reserved_mask |= 1 << i;
2197                         }
2198                 }
2199
2200                 if (tp_features.hotkey_wlsw) {
2201                         set_bit(EV_SW, tpacpi_inputdev->evbit);
2202                         set_bit(SW_RADIO, tpacpi_inputdev->swbit);
2203                 }
2204                 if (tp_features.hotkey_tablet) {
2205                         set_bit(EV_SW, tpacpi_inputdev->evbit);
2206                         set_bit(SW_TABLET_MODE, tpacpi_inputdev->swbit);
2207                 }
2208
2209                 /* Do not issue duplicate brightness change events to
2210                  * userspace */
2211                 if (!tp_features.bright_acpimode)
2212                         /* update bright_acpimode... */
2213                         tpacpi_check_std_acpi_brightness_support();
2214
2215                 if (tp_features.bright_acpimode) {
2216                         printk(TPACPI_INFO
2217                                "This ThinkPad has standard ACPI backlight "
2218                                "brightness control, supported by the ACPI "
2219                                "video driver\n");
2220                         printk(TPACPI_NOTICE
2221                                "Disabling thinkpad-acpi brightness events "
2222                                "by default...\n");
2223
2224                         /* The hotkey_reserved_mask change below is not
2225                          * necessary while the keys are at KEY_RESERVED in the
2226                          * default map, but better safe than sorry, leave it
2227                          * here as a marker of what we have to do, especially
2228                          * when we finally become able to set this at runtime
2229                          * on response to X.org requests */
2230                         hotkey_reserved_mask |=
2231                                 (1 << TP_ACPI_HOTKEYSCAN_FNHOME)
2232                                 | (1 << TP_ACPI_HOTKEYSCAN_FNEND);
2233                 }
2234
2235                 dbg_printk(TPACPI_DBG_INIT,
2236                                 "enabling hot key handling\n");
2237                 res = hotkey_status_set(1);
2238                 if (res)
2239                         return res;
2240                 res = hotkey_mask_set(((hotkey_all_mask | hotkey_source_mask)
2241                                         & ~hotkey_reserved_mask)
2242                                         | hotkey_orig_mask);
2243                 if (res < 0 && res != -ENXIO)
2244                         return res;
2245
2246                 dbg_printk(TPACPI_DBG_INIT,
2247                                 "legacy hot key reporting over procfs %s\n",
2248                                 (hotkey_report_mode < 2) ?
2249                                         "enabled" : "disabled");
2250
2251                 tpacpi_inputdev->open = &hotkey_inputdev_open;
2252                 tpacpi_inputdev->close = &hotkey_inputdev_close;
2253
2254                 hotkey_poll_setup_safe(1);
2255                 tpacpi_input_send_radiosw();
2256                 tpacpi_input_send_tabletsw();
2257         }
2258
2259         return (tp_features.hotkey)? 0 : 1;
2260 }
2261
2262 static void hotkey_exit(void)
2263 {
2264 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2265         hotkey_poll_stop_sync();
2266 #endif
2267
2268         if (tp_features.hotkey) {
2269                 dbg_printk(TPACPI_DBG_EXIT,
2270                            "restoring original hot key mask\n");
2271                 /* no short-circuit boolean operator below! */
2272                 if ((hotkey_mask_set(hotkey_orig_mask) |
2273                      hotkey_status_set(hotkey_orig_status)) != 0)
2274                         printk(TPACPI_ERR
2275                                "failed to restore hot key mask "
2276                                "to BIOS defaults\n");
2277         }
2278
2279         if (hotkey_dev_attributes) {
2280                 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
2281                 hotkey_dev_attributes = NULL;
2282         }
2283 }
2284
2285 static void hotkey_notify(struct ibm_struct *ibm, u32 event)
2286 {
2287         u32 hkey;
2288         unsigned int scancode;
2289         int send_acpi_ev;
2290         int ignore_acpi_ev;
2291         int unk_ev;
2292
2293         if (event != 0x80) {
2294                 printk(TPACPI_ERR
2295                        "unknown HKEY notification event %d\n", event);
2296                 /* forward it to userspace, maybe it knows how to handle it */
2297                 acpi_bus_generate_netlink_event(
2298                                         ibm->acpi->device->pnp.device_class,
2299                                         ibm->acpi->device->dev.bus_id,
2300                                         event, 0);
2301                 return;
2302         }
2303
2304         while (1) {
2305                 if (!acpi_evalf(hkey_handle, &hkey, "MHKP", "d")) {
2306                         printk(TPACPI_ERR "failed to retrieve HKEY event\n");
2307                         return;
2308                 }
2309
2310                 if (hkey == 0) {
2311                         /* queue empty */
2312                         return;
2313                 }
2314
2315                 send_acpi_ev = 1;
2316                 ignore_acpi_ev = 0;
2317                 unk_ev = 0;
2318
2319                 switch (hkey >> 12) {
2320                 case 1:
2321                         /* 0x1000-0x1FFF: key presses */
2322                         scancode = hkey & 0xfff;
2323                         if (scancode > 0 && scancode < 0x21) {
2324                                 scancode--;
2325                                 if (!(hotkey_source_mask & (1 << scancode))) {
2326                                         tpacpi_input_send_key(scancode);
2327                                         send_acpi_ev = 0;
2328                                 } else {
2329                                         ignore_acpi_ev = 1;
2330                                 }
2331                         } else {
2332                                 unk_ev = 1;
2333                         }
2334                         break;
2335                 case 2:
2336                         /* Wakeup reason */
2337                         switch (hkey) {
2338                         case 0x2304: /* suspend, undock */
2339                         case 0x2404: /* hibernation, undock */
2340                                 hotkey_wakeup_reason = TP_ACPI_WAKEUP_UNDOCK;
2341                                 ignore_acpi_ev = 1;
2342                                 break;
2343                         case 0x2305: /* suspend, bay eject */
2344                         case 0x2405: /* hibernation, bay eject */
2345                                 hotkey_wakeup_reason = TP_ACPI_WAKEUP_BAYEJ;
2346                                 ignore_acpi_ev = 1;
2347                                 break;
2348                         default:
2349                                 unk_ev = 1;
2350                         }
2351                         if (hotkey_wakeup_reason != TP_ACPI_WAKEUP_NONE) {
2352                                 printk(TPACPI_INFO
2353                                        "woke up due to a hot-unplug "
2354                                        "request...\n");
2355                                 hotkey_wakeup_reason_notify_change();
2356                         }
2357                         break;
2358                 case 3:
2359                         /* bay-related wakeups */
2360                         if (hkey == 0x3003) {
2361                                 hotkey_autosleep_ack = 1;
2362                                 printk(TPACPI_INFO
2363                                        "bay ejected\n");
2364                                 hotkey_wakeup_hotunplug_complete_notify_change();
2365                         } else {
2366                                 unk_ev = 1;
2367                         }
2368                         break;
2369                 case 4:
2370                         /* dock-related wakeups */
2371                         if (hkey == 0x4003) {
2372                                 hotkey_autosleep_ack = 1;
2373                                 printk(TPACPI_INFO
2374                                        "undocked\n");
2375                                 hotkey_wakeup_hotunplug_complete_notify_change();
2376                         } else {
2377                                 unk_ev = 1;
2378                         }
2379                         break;
2380                 case 5:
2381                         /* 0x5000-0x5FFF: human interface helpers */
2382                         switch (hkey) {
2383                         case 0x5010: /* Lenovo new BIOS: brightness changed */
2384                         case 0x500b: /* X61t: tablet pen inserted into bay */
2385                         case 0x500c: /* X61t: tablet pen removed from bay */
2386                                 break;
2387                         case 0x5009: /* X41t-X61t: swivel up (tablet mode) */
2388                         case 0x500a: /* X41t-X61t: swivel down (normal mode) */
2389                                 tpacpi_input_send_tabletsw();
2390                                 hotkey_tablet_mode_notify_change();
2391                                 send_acpi_ev = 0;
2392                                 break;
2393                         case 0x5001:
2394                         case 0x5002:
2395                                 /* LID switch events.  Do not propagate */
2396                                 ignore_acpi_ev = 1;
2397                                 break;
2398                         default:
2399                                 unk_ev = 1;
2400                         }
2401                         break;
2402                 case 7:
2403                         /* 0x7000-0x7FFF: misc */
2404                         if (tp_features.hotkey_wlsw && hkey == 0x7000) {
2405                                 tpacpi_input_send_radiosw();
2406                                 hotkey_radio_sw_notify_change();
2407                                 send_acpi_ev = 0;
2408                                 break;
2409                         }
2410                         /* fallthrough to default */
2411                 default:
2412                         unk_ev = 1;
2413                 }
2414                 if (unk_ev) {
2415                         printk(TPACPI_NOTICE
2416                                "unhandled HKEY event 0x%04x\n", hkey);
2417                 }
2418
2419                 /* Legacy events */
2420                 if (!ignore_acpi_ev &&
2421                     (send_acpi_ev || hotkey_report_mode < 2)) {
2422                         acpi_bus_generate_proc_event(ibm->acpi->device,
2423                                                      event, hkey);
2424                 }
2425
2426                 /* netlink events */
2427                 if (!ignore_acpi_ev && send_acpi_ev) {
2428                         acpi_bus_generate_netlink_event(
2429                                         ibm->acpi->device->pnp.device_class,
2430                                         ibm->acpi->device->dev.bus_id,
2431                                         event, hkey);
2432                 }
2433         }
2434 }
2435
2436 static void hotkey_suspend(pm_message_t state)
2437 {
2438         /* Do these on suspend, we get the events on early resume! */
2439         hotkey_wakeup_reason = TP_ACPI_WAKEUP_NONE;
2440         hotkey_autosleep_ack = 0;
2441 }
2442
2443 static void hotkey_resume(void)
2444 {
2445         if (hotkey_mask_get())
2446                 printk(TPACPI_ERR
2447                        "error while trying to read hot key mask "
2448                        "from firmware\n");
2449         tpacpi_input_send_radiosw();
2450         hotkey_radio_sw_notify_change();
2451         hotkey_tablet_mode_notify_change();
2452         hotkey_wakeup_reason_notify_change();
2453         hotkey_wakeup_hotunplug_complete_notify_change();
2454         hotkey_poll_setup_safe(0);
2455 }
2456
2457 /* procfs -------------------------------------------------------------- */
2458 static int hotkey_read(char *p)
2459 {
2460         int res, status;
2461         int len = 0;
2462
2463         if (!tp_features.hotkey) {
2464                 len += sprintf(p + len, "status:\t\tnot supported\n");
2465                 return len;
2466         }
2467
2468         if (mutex_lock_interruptible(&hotkey_mutex))
2469                 return -ERESTARTSYS;
2470         res = hotkey_status_get(&status);
2471         if (!res)
2472                 res = hotkey_mask_get();
2473         mutex_unlock(&hotkey_mutex);
2474         if (res)
2475                 return res;
2476
2477         len += sprintf(p + len, "status:\t\t%s\n", enabled(status, 0));
2478         if (tp_features.hotkey_mask) {
2479                 len += sprintf(p + len, "mask:\t\t0x%08x\n", hotkey_mask);
2480                 len += sprintf(p + len,
2481                                "commands:\tenable, disable, reset, <mask>\n");
2482         } else {
2483                 len += sprintf(p + len, "mask:\t\tnot supported\n");
2484                 len += sprintf(p + len, "commands:\tenable, disable, reset\n");
2485         }
2486
2487         return len;
2488 }
2489
2490 static int hotkey_write(char *buf)
2491 {
2492         int res, status;
2493         u32 mask;
2494         char *cmd;
2495
2496         if (!tp_features.hotkey)
2497                 return -ENODEV;
2498
2499         if (mutex_lock_interruptible(&hotkey_mutex))
2500                 return -ERESTARTSYS;
2501
2502         status = -1;
2503         mask = hotkey_mask;
2504
2505         res = 0;
2506         while ((cmd = next_cmd(&buf))) {
2507                 if (strlencmp(cmd, "enable") == 0) {
2508                         status = 1;
2509                 } else if (strlencmp(cmd, "disable") == 0) {
2510                         status = 0;
2511                 } else if (strlencmp(cmd, "reset") == 0) {
2512                         status = hotkey_orig_status;
2513                         mask = hotkey_orig_mask;
2514                 } else if (sscanf(cmd, "0x%x", &mask) == 1) {
2515                         /* mask set */
2516                 } else if (sscanf(cmd, "%x", &mask) == 1) {
2517                         /* mask set */
2518                 } else {
2519                         res = -EINVAL;
2520                         goto errexit;
2521                 }
2522         }
2523         if (status != -1)
2524                 res = hotkey_status_set(status);
2525
2526         if (!res && mask != hotkey_mask)
2527                 res = hotkey_mask_set(mask);
2528
2529 errexit:
2530         mutex_unlock(&hotkey_mutex);
2531         return res;
2532 }
2533
2534 static const struct acpi_device_id ibm_htk_device_ids[] = {
2535         {TPACPI_ACPI_HKEY_HID, 0},
2536         {"", 0},
2537 };
2538
2539 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver = {
2540         .hid = ibm_htk_device_ids,
2541         .notify = hotkey_notify,
2542         .handle = &hkey_handle,
2543         .type = ACPI_DEVICE_NOTIFY,
2544 };
2545
2546 static struct ibm_struct hotkey_driver_data = {
2547         .name = "hotkey",
2548         .read = hotkey_read,
2549         .write = hotkey_write,
2550         .exit = hotkey_exit,
2551         .resume = hotkey_resume,
2552         .suspend = hotkey_suspend,
2553         .acpi = &ibm_hotkey_acpidriver,
2554 };
2555
2556 /*************************************************************************
2557  * Bluetooth subdriver
2558  */
2559
2560 enum {
2561         /* ACPI GBDC/SBDC bits */
2562         TP_ACPI_BLUETOOTH_HWPRESENT     = 0x01, /* Bluetooth hw available */
2563         TP_ACPI_BLUETOOTH_RADIOSSW      = 0x02, /* Bluetooth radio enabled */
2564         TP_ACPI_BLUETOOTH_UNK           = 0x04, /* unknown function */
2565 };
2566
2567 static int bluetooth_get_radiosw(void);
2568 static int bluetooth_set_radiosw(int radio_on);
2569
2570 /* sysfs bluetooth enable ---------------------------------------------- */
2571 static ssize_t bluetooth_enable_show(struct device *dev,
2572                            struct device_attribute *attr,
2573                            char *buf)
2574 {
2575         int status;
2576
2577         status = bluetooth_get_radiosw();
2578         if (status < 0)
2579                 return status;
2580
2581         return snprintf(buf, PAGE_SIZE, "%d\n", status ? 1 : 0);
2582 }
2583
2584 static ssize_t bluetooth_enable_store(struct device *dev,
2585                             struct device_attribute *attr,
2586                             const char *buf, size_t count)
2587 {
2588         unsigned long t;
2589         int res;
2590
2591         if (parse_strtoul(buf, 1, &t))
2592                 return -EINVAL;
2593
2594         res = bluetooth_set_radiosw(t);
2595
2596         return (res) ? res : count;
2597 }
2598
2599 static struct device_attribute dev_attr_bluetooth_enable =
2600         __ATTR(bluetooth_enable, S_IWUSR | S_IRUGO,
2601                 bluetooth_enable_show, bluetooth_enable_store);
2602
2603 /* --------------------------------------------------------------------- */
2604
2605 static struct attribute *bluetooth_attributes[] = {
2606         &dev_attr_bluetooth_enable.attr,
2607         NULL
2608 };
2609
2610 static const struct attribute_group bluetooth_attr_group = {
2611         .attrs = bluetooth_attributes,
2612 };
2613
2614 static int __init bluetooth_init(struct ibm_init_struct *iibm)
2615 {
2616         int res;
2617         int status = 0;
2618
2619         vdbg_printk(TPACPI_DBG_INIT, "initializing bluetooth subdriver\n");
2620
2621         TPACPI_ACPIHANDLE_INIT(hkey);
2622
2623         /* bluetooth not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
2624            G4x, R30, R31, R40e, R50e, T20-22, X20-21 */
2625         tp_features.bluetooth = hkey_handle &&
2626             acpi_evalf(hkey_handle, &status, "GBDC", "qd");
2627
2628         vdbg_printk(TPACPI_DBG_INIT, "bluetooth is %s, status 0x%02x\n",
2629                 str_supported(tp_features.bluetooth),
2630                 status);
2631
2632         if (tp_features.bluetooth) {
2633                 if (!(status & TP_ACPI_BLUETOOTH_HWPRESENT)) {
2634                         /* no bluetooth hardware present in system */
2635                         tp_features.bluetooth = 0;
2636                         dbg_printk(TPACPI_DBG_INIT,
2637                                    "bluetooth hardware not installed\n");
2638                 } else {
2639                         res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
2640                                         &bluetooth_attr_group);
2641                         if (res)
2642                                 return res;
2643                 }
2644         }
2645
2646         return (tp_features.bluetooth)? 0 : 1;
2647 }
2648
2649 static void bluetooth_exit(void)
2650 {
2651         sysfs_remove_group(&tpacpi_pdev->dev.kobj,
2652                         &bluetooth_attr_group);
2653 }
2654
2655 static int bluetooth_get_radiosw(void)
2656 {
2657         int status;
2658
2659         if (!tp_features.bluetooth)
2660                 return -ENODEV;
2661
2662         if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
2663                 return -EIO;
2664
2665         return ((status & TP_ACPI_BLUETOOTH_RADIOSSW) != 0);
2666 }
2667
2668 static int bluetooth_set_radiosw(int radio_on)
2669 {
2670         int status;
2671
2672         if (!tp_features.bluetooth)
2673                 return -ENODEV;
2674
2675         if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
2676                 return -EIO;
2677         if (radio_on)
2678                 status |= TP_ACPI_BLUETOOTH_RADIOSSW;
2679         else
2680                 status &= ~TP_ACPI_BLUETOOTH_RADIOSSW;
2681         if (!acpi_evalf(hkey_handle, NULL, "SBDC", "vd", status))
2682                 return -EIO;
2683
2684         return 0;
2685 }
2686
2687 /* procfs -------------------------------------------------------------- */
2688 static int bluetooth_read(char *p)
2689 {
2690         int len = 0;
2691         int status = bluetooth_get_radiosw();
2692
2693         if (!tp_features.bluetooth)
2694                 len += sprintf(p + len, "status:\t\tnot supported\n");
2695         else {
2696                 len += sprintf(p + len, "status:\t\t%s\n",
2697                                 (status)? "enabled" : "disabled");
2698                 len += sprintf(p + len, "commands:\tenable, disable\n");
2699         }
2700
2701         return len;
2702 }
2703
2704 static int bluetooth_write(char *buf)
2705 {
2706         char *cmd;
2707
2708         if (!tp_features.bluetooth)
2709                 return -ENODEV;
2710
2711         while ((cmd = next_cmd(&buf))) {
2712                 if (strlencmp(cmd, "enable") == 0) {
2713                         bluetooth_set_radiosw(1);
2714                 } else if (strlencmp(cmd, "disable") == 0) {
2715                         bluetooth_set_radiosw(0);
2716                 } else
2717                         return -EINVAL;
2718         }
2719
2720         return 0;
2721 }
2722
2723 static struct ibm_struct bluetooth_driver_data = {
2724         .name = "bluetooth",
2725         .read = bluetooth_read,
2726         .write = bluetooth_write,
2727         .exit = bluetooth_exit,
2728 };
2729
2730 /*************************************************************************
2731  * Wan subdriver
2732  */
2733
2734 enum {
2735         /* ACPI GWAN/SWAN bits */
2736         TP_ACPI_WANCARD_HWPRESENT       = 0x01, /* Wan hw available */
2737         TP_ACPI_WANCARD_RADIOSSW        = 0x02, /* Wan radio enabled */
2738         TP_ACPI_WANCARD_UNK             = 0x04, /* unknown function */
2739 };
2740
2741 static int wan_get_radiosw(void);
2742 static int wan_set_radiosw(int radio_on);
2743
2744 /* sysfs wan enable ---------------------------------------------------- */
2745 static ssize_t wan_enable_show(struct device *dev,
2746                            struct device_attribute *attr,
2747                            char *buf)
2748 {
2749         int status;
2750
2751         status = wan_get_radiosw();
2752         if (status < 0)
2753                 return status;
2754
2755         return snprintf(buf, PAGE_SIZE, "%d\n", status ? 1 : 0);
2756 }
2757
2758 static ssize_t wan_enable_store(struct device *dev,
2759                             struct device_attribute *attr,
2760                             const char *buf, size_t count)
2761 {
2762         unsigned long t;
2763         int res;
2764
2765         if (parse_strtoul(buf, 1, &t))
2766                 return -EINVAL;
2767
2768         res = wan_set_radiosw(t);
2769
2770         return (res) ? res : count;
2771 }
2772
2773 static struct device_attribute dev_attr_wan_enable =
2774         __ATTR(wwan_enable, S_IWUSR | S_IRUGO,
2775                 wan_enable_show, wan_enable_store);
2776
2777 /* --------------------------------------------------------------------- */
2778
2779 static struct attribute *wan_attributes[] = {
2780         &dev_attr_wan_enable.attr,
2781         NULL
2782 };
2783
2784 static const struct attribute_group wan_attr_group = {
2785         .attrs = wan_attributes,
2786 };
2787
2788 static int __init wan_init(struct ibm_init_struct *iibm)
2789 {
2790         int res;
2791         int status = 0;
2792
2793         vdbg_printk(TPACPI_DBG_INIT, "initializing wan subdriver\n");
2794
2795         TPACPI_ACPIHANDLE_INIT(hkey);
2796
2797         tp_features.wan = hkey_handle &&
2798             acpi_evalf(hkey_handle, &status, "GWAN", "qd");
2799
2800         vdbg_printk(TPACPI_DBG_INIT, "wan is %s, status 0x%02x\n",
2801                 str_supported(tp_features.wan),
2802                 status);
2803
2804         if (tp_features.wan) {
2805                 if (!(status & TP_ACPI_WANCARD_HWPRESENT)) {
2806                         /* no wan hardware present in system */
2807                         tp_features.wan = 0;
2808                         dbg_printk(TPACPI_DBG_INIT,
2809                                    "wan hardware not installed\n");
2810                 } else {
2811                         res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
2812                                         &wan_attr_group);
2813                         if (res)
2814                                 return res;
2815                 }
2816         }
2817
2818         return (tp_features.wan)? 0 : 1;
2819 }
2820
2821 static void wan_exit(void)
2822 {
2823         sysfs_remove_group(&tpacpi_pdev->dev.kobj,
2824                 &wan_attr_group);
2825 }
2826
2827 static int wan_get_radiosw(void)
2828 {
2829         int status;
2830
2831         if (!tp_features.wan)
2832                 return -ENODEV;
2833
2834         if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
2835                 return -EIO;
2836
2837         return ((status & TP_ACPI_WANCARD_RADIOSSW) != 0);
2838 }
2839
2840 static int wan_set_radiosw(int radio_on)
2841 {
2842         int status;
2843
2844         if (!tp_features.wan)
2845                 return -ENODEV;
2846
2847         if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
2848                 return -EIO;
2849         if (radio_on)
2850                 status |= TP_ACPI_WANCARD_RADIOSSW;
2851         else
2852                 status &= ~TP_ACPI_WANCARD_RADIOSSW;
2853         if (!acpi_evalf(hkey_handle, NULL, "SWAN", "vd", status))
2854                 return -EIO;
2855
2856         return 0;
2857 }
2858
2859 /* procfs -------------------------------------------------------------- */
2860 static int wan_read(char *p)
2861 {
2862         int len = 0;
2863         int status = wan_get_radiosw();
2864
2865         if (!tp_features.wan)
2866                 len += sprintf(p + len, "status:\t\tnot supported\n");
2867         else {
2868                 len += sprintf(p + len, "status:\t\t%s\n",
2869                                 (status)? "enabled" : "disabled");
2870                 len += sprintf(p + len, "commands:\tenable, disable\n");
2871         }
2872
2873         return len;
2874 }
2875
2876 static int wan_write(char *buf)
2877 {
2878         char *cmd;
2879
2880         if (!tp_features.wan)
2881                 return -ENODEV;
2882
2883         while ((cmd = next_cmd(&buf))) {
2884                 if (strlencmp(cmd, "enable") == 0) {
2885                         wan_set_radiosw(1);
2886                 } else if (strlencmp(cmd, "disable") == 0) {
2887                         wan_set_radiosw(0);
2888                 } else
2889                         return -EINVAL;
2890         }
2891
2892         return 0;
2893 }
2894
2895 static struct ibm_struct wan_driver_data = {
2896         .name = "wan",
2897         .read = wan_read,
2898         .write = wan_write,
2899         .exit = wan_exit,
2900         .flags.experimental = 1,
2901 };
2902
2903 /*************************************************************************
2904  * Video subdriver
2905  */
2906
2907 #ifdef CONFIG_THINKPAD_ACPI_VIDEO
2908
2909 enum video_access_mode {
2910         TPACPI_VIDEO_NONE = 0,
2911         TPACPI_VIDEO_570,       /* 570 */
2912         TPACPI_VIDEO_770,       /* 600e/x, 770e, 770x */
2913         TPACPI_VIDEO_NEW,       /* all others */
2914 };
2915
2916 enum {  /* video status flags, based on VIDEO_570 */
2917         TP_ACPI_VIDEO_S_LCD = 0x01,     /* LCD output enabled */
2918         TP_ACPI_VIDEO_S_CRT = 0x02,     /* CRT output enabled */
2919         TP_ACPI_VIDEO_S_DVI = 0x08,     /* DVI output enabled */
2920 };
2921
2922 enum {  /* TPACPI_VIDEO_570 constants */
2923         TP_ACPI_VIDEO_570_PHSCMD = 0x87,        /* unknown magic constant :( */
2924         TP_ACPI_VIDEO_570_PHSMASK = 0x03,       /* PHS bits that map to
2925                                                  * video_status_flags */
2926         TP_ACPI_VIDEO_570_PHS2CMD = 0x8b,       /* unknown magic constant :( */
2927         TP_ACPI_VIDEO_570_PHS2SET = 0x80,       /* unknown magic constant :( */
2928 };
2929
2930 static enum video_access_mode video_supported;
2931 static int video_orig_autosw;
2932
2933 static int video_autosw_get(void);
2934 static int video_autosw_set(int enable);
2935
2936 TPACPI_HANDLE(vid2, root, "\\_SB.PCI0.AGPB.VID");       /* G41 */
2937
2938 static int __init video_init(struct ibm_init_struct *iibm)
2939 {
2940         int ivga;
2941
2942         vdbg_printk(TPACPI_DBG_INIT, "initializing video subdriver\n");
2943
2944         TPACPI_ACPIHANDLE_INIT(vid);
2945         TPACPI_ACPIHANDLE_INIT(vid2);
2946
2947         if (vid2_handle && acpi_evalf(NULL, &ivga, "\\IVGA", "d") && ivga)
2948                 /* G41, assume IVGA doesn't change */
2949                 vid_handle = vid2_handle;
2950
2951         if (!vid_handle)
2952                 /* video switching not supported on R30, R31 */
2953                 video_supported = TPACPI_VIDEO_NONE;
2954         else if (acpi_evalf(vid_handle, &video_orig_autosw, "SWIT", "qd"))
2955                 /* 570 */
2956                 video_supported = TPACPI_VIDEO_570;
2957         else if (acpi_evalf(vid_handle, &video_orig_autosw, "^VADL", "qd"))
2958                 /* 600e/x, 770e, 770x */
2959                 video_supported = TPACPI_VIDEO_770;
2960         else
2961                 /* all others */
2962                 video_supported = TPACPI_VIDEO_NEW;
2963
2964         vdbg_printk(TPACPI_DBG_INIT, "video is %s, mode %d\n",
2965                 str_supported(video_supported != TPACPI_VIDEO_NONE),
2966                 video_supported);
2967
2968         return (video_supported != TPACPI_VIDEO_NONE)? 0 : 1;
2969 }
2970
2971 static void video_exit(void)
2972 {
2973         dbg_printk(TPACPI_DBG_EXIT,
2974                    "restoring original video autoswitch mode\n");
2975         if (video_autosw_set(video_orig_autosw))
2976                 printk(TPACPI_ERR "error while trying to restore original "
2977                         "video autoswitch mode\n");
2978 }
2979
2980 static int video_outputsw_get(void)
2981 {
2982         int status = 0;
2983         int i;
2984
2985         switch (video_supported) {
2986         case TPACPI_VIDEO_570:
2987                 if (!acpi_evalf(NULL, &i, "\\_SB.PHS", "dd",
2988                                  TP_ACPI_VIDEO_570_PHSCMD))
2989                         return -EIO;
2990                 status = i & TP_ACPI_VIDEO_570_PHSMASK;
2991                 break;
2992         case TPACPI_VIDEO_770:
2993                 if (!acpi_evalf(NULL, &i, "\\VCDL", "d"))
2994                         return -EIO;
2995                 if (i)
2996                         status |= TP_ACPI_VIDEO_S_LCD;
2997                 if (!acpi_evalf(NULL, &i, "\\VCDC", "d"))
2998                         return -EIO;
2999                 if (i)
3000                         status |= TP_ACPI_VIDEO_S_CRT;
3001                 break;
3002         case TPACPI_VIDEO_NEW:
3003                 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 1) ||
3004                     !acpi_evalf(NULL, &i, "\\VCDC", "d"))
3005                         return -EIO;
3006                 if (i)
3007                         status |= TP_ACPI_VIDEO_S_CRT;
3008
3009                 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0) ||
3010                     !acpi_evalf(NULL, &i, "\\VCDL", "d"))
3011                         return -EIO;
3012                 if (i)
3013                         status |= TP_ACPI_VIDEO_S_LCD;
3014                 if (!acpi_evalf(NULL, &i, "\\VCDD", "d"))
3015                         return -EIO;
3016                 if (i)
3017                         status |= TP_ACPI_VIDEO_S_DVI;
3018                 break;
3019         default:
3020                 return -ENOSYS;
3021         }
3022
3023         return status;
3024 }
3025
3026 static int video_outputsw_set(int status)
3027 {
3028         int autosw;
3029         int res = 0;
3030
3031         switch (video_supported) {
3032         case TPACPI_VIDEO_570:
3033                 res = acpi_evalf(NULL, NULL,
3034                                  "\\_SB.PHS2", "vdd",
3035                                  TP_ACPI_VIDEO_570_PHS2CMD,
3036                                  status | TP_ACPI_VIDEO_570_PHS2SET);
3037                 break;
3038         case TPACPI_VIDEO_770:
3039                 autosw = video_autosw_get();
3040                 if (autosw < 0)
3041                         return autosw;
3042
3043                 res = video_autosw_set(1);
3044                 if (res)
3045                         return res;
3046                 res = acpi_evalf(vid_handle, NULL,
3047                                  "ASWT", "vdd", status * 0x100, 0);
3048                 if (!autosw && video_autosw_set(autosw)) {
3049                         printk(TPACPI_ERR
3050                                "video auto-switch left enabled due to error\n");
3051                         return -EIO;
3052                 }
3053                 break;
3054         case TPACPI_VIDEO_NEW:
3055                 res = acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0x80) &&
3056                       acpi_evalf(NULL, NULL, "\\VSDS", "vdd", status, 1);
3057                 break;
3058         default:
3059                 return -ENOSYS;
3060         }
3061
3062         return (res)? 0 : -EIO;
3063 }
3064
3065 static int video_autosw_get(void)
3066 {
3067         int autosw = 0;
3068
3069         switch (video_supported) {
3070         case TPACPI_VIDEO_570:
3071                 if (!acpi_evalf(vid_handle, &autosw, "SWIT", "d"))
3072                         return -EIO;
3073                 break;
3074         case TPACPI_VIDEO_770:
3075         case TPACPI_VIDEO_NEW:
3076                 if (!acpi_evalf(vid_handle, &autosw, "^VDEE", "d"))
3077                         return -EIO;
3078                 break;
3079         default:
3080                 return -ENOSYS;
3081         }
3082
3083         return autosw & 1;
3084 }
3085
3086 static int video_autosw_set(int enable)
3087 {
3088         if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", (enable)? 1 : 0))
3089                 return -EIO;
3090         return 0;
3091 }
3092
3093 static int video_outputsw_cycle(void)
3094 {
3095         int autosw = video_autosw_get();
3096         int res;
3097
3098         if (autosw < 0)
3099                 return autosw;
3100
3101         switch (video_supported) {
3102         case TPACPI_VIDEO_570:
3103                 res = video_autosw_set(1);
3104                 if (res)
3105                         return res;
3106                 res = acpi_evalf(ec_handle, NULL, "_Q16", "v");
3107                 break;
3108         case TPACPI_VIDEO_770:
3109         case TPACPI_VIDEO_NEW:
3110                 res = video_autosw_set(1);
3111                 if (res)
3112                         return res;
3113                 res = acpi_evalf(vid_handle, NULL, "VSWT", "v");
3114                 break;
3115         default:
3116                 return -ENOSYS;
3117         }
3118         if (!autosw && video_autosw_set(autosw)) {
3119                 printk(TPACPI_ERR
3120                        "video auto-switch left enabled due to error\n");
3121                 return -EIO;
3122         }
3123
3124         return (res)? 0 : -EIO;
3125 }
3126
3127 static int video_expand_toggle(void)
3128 {
3129         switch (video_supported) {
3130         case TPACPI_VIDEO_570:
3131                 return acpi_evalf(ec_handle, NULL, "_Q17", "v")?
3132                         0 : -EIO;
3133         case TPACPI_VIDEO_770:
3134                 return acpi_evalf(vid_handle, NULL, "VEXP", "v")?
3135                         0 : -EIO;
3136         case TPACPI_VIDEO_NEW:
3137                 return acpi_evalf(NULL, NULL, "\\VEXP", "v")?
3138                         0 : -EIO;
3139         default:
3140                 return -ENOSYS;
3141         }
3142         /* not reached */
3143 }
3144
3145 static int video_read(char *p)
3146 {
3147         int status, autosw;
3148         int len = 0;
3149
3150         if (video_supported == TPACPI_VIDEO_NONE) {
3151                 len += sprintf(p + len, "status:\t\tnot supported\n");
3152                 return len;
3153         }
3154
3155         status = video_outputsw_get();
3156         if (status < 0)
3157                 return status;
3158
3159         autosw = video_autosw_get();
3160         if (autosw < 0)
3161                 return autosw;
3162
3163         len += sprintf(p + len, "status:\t\tsupported\n");
3164         len += sprintf(p + len, "lcd:\t\t%s\n", enabled(status, 0));
3165         len += sprintf(p + len, "crt:\t\t%s\n", enabled(status, 1));
3166         if (video_supported == TPACPI_VIDEO_NEW)
3167                 len += sprintf(p + len, "dvi:\t\t%s\n", enabled(status, 3));
3168         len += sprintf(p + len, "auto:\t\t%s\n", enabled(autosw, 0));
3169         len += sprintf(p + len, "commands:\tlcd_enable, lcd_disable\n");
3170         len += sprintf(p + len, "commands:\tcrt_enable, crt_disable\n");
3171         if (video_supported == TPACPI_VIDEO_NEW)
3172                 len += sprintf(p + len, "commands:\tdvi_enable, dvi_disable\n");
3173         len += sprintf(p + len, "commands:\tauto_enable, auto_disable\n");
3174         len += sprintf(p + len, "commands:\tvideo_switch, expand_toggle\n");
3175
3176         return len;
3177 }
3178
3179 static int video_write(char *buf)
3180 {
3181         char *cmd;
3182         int enable, disable, status;
3183         int res;
3184
3185         if (video_supported == TPACPI_VIDEO_NONE)
3186                 return -ENODEV;
3187
3188         enable = 0;
3189         disable = 0;
3190
3191         while ((cmd = next_cmd(&buf))) {
3192                 if (strlencmp(cmd, "lcd_enable") == 0) {
3193                         enable |= TP_ACPI_VIDEO_S_LCD;
3194                 } else if (strlencmp(cmd, "lcd_disable") == 0) {
3195                         disable |= TP_ACPI_VIDEO_S_LCD;
3196                 } else if (strlencmp(cmd, "crt_enable") == 0) {
3197                         enable |= TP_ACPI_VIDEO_S_CRT;
3198                 } else if (strlencmp(cmd, "crt_disable") == 0) {
3199                         disable |= TP_ACPI_VIDEO_S_CRT;
3200                 } else if (video_supported == TPACPI_VIDEO_NEW &&
3201                            strlencmp(cmd, "dvi_enable") == 0) {
3202                         enable |= TP_ACPI_VIDEO_S_DVI;
3203                 } else if (video_supported == TPACPI_VIDEO_NEW &&
3204                            strlencmp(cmd, "dvi_disable") == 0) {
3205                         disable |= TP_ACPI_VIDEO_S_DVI;
3206                 } else if (strlencmp(cmd, "auto_enable") == 0) {
3207                         res = video_autosw_set(1);
3208                         if (res)
3209                                 return res;
3210                 } else if (strlencmp(cmd, "auto_disable") == 0) {
3211                         res = video_autosw_set(0);
3212                         if (res)
3213                                 return res;
3214                 } else if (strlencmp(cmd, "video_switch") == 0) {
3215                         res = video_outputsw_cycle();
3216                         if (res)
3217                                 return res;
3218                 } else if (strlencmp(cmd, "expand_toggle") == 0) {
3219                         res = video_expand_toggle();
3220                         if (res)
3221                                 return res;
3222                 } else
3223                         return -EINVAL;
3224         }
3225
3226         if (enable || disable) {
3227                 status = video_outputsw_get();
3228                 if (status < 0)
3229                         return status;
3230                 res = video_outputsw_set((status & ~disable) | enable);
3231                 if (res)
3232                         return res;
3233         }
3234
3235         return 0;
3236 }
3237
3238 static struct ibm_struct video_driver_data = {
3239         .name = "video",
3240         .read = video_read,
3241         .write = video_write,
3242         .exit = video_exit,
3243 };
3244
3245 #endif /* CONFIG_THINKPAD_ACPI_VIDEO */
3246
3247 /*************************************************************************
3248  * Light (thinklight) subdriver
3249  */
3250
3251 TPACPI_HANDLE(lght, root, "\\LGHT");    /* A21e, A2xm/p, T20-22, X20-21 */
3252 TPACPI_HANDLE(ledb, ec, "LEDB");                /* G4x */
3253
3254 static int light_get_status(void)
3255 {
3256         int status = 0;
3257
3258         if (tp_features.light_status) {
3259                 if (!acpi_evalf(ec_handle, &status, "KBLT", "d"))
3260                         return -EIO;
3261                 return (!!status);
3262         }
3263
3264         return -ENXIO;
3265 }
3266
3267 static int light_set_status(int status)
3268 {
3269         int rc;
3270
3271         if (tp_features.light) {
3272                 if (cmos_handle) {
3273                         rc = acpi_evalf(cmos_handle, NULL, NULL, "vd",
3274                                         (status)?
3275                                                 TP_CMOS_THINKLIGHT_ON :
3276                                                 TP_CMOS_THINKLIGHT_OFF);
3277                 } else {
3278                         rc = acpi_evalf(lght_handle, NULL, NULL, "vd",
3279                                         (status)? 1 : 0);
3280                 }
3281                 return (rc)? 0 : -EIO;
3282         }
3283
3284         return -ENXIO;
3285 }
3286
3287 static void light_set_status_worker(struct work_struct *work)
3288 {
3289         struct tpacpi_led_classdev *data =
3290                         container_of(work, struct tpacpi_led_classdev, work);
3291
3292         if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING))
3293                 light_set_status((data->new_brightness != LED_OFF));
3294 }
3295
3296 static void light_sysfs_set(struct led_classdev *led_cdev,
3297                         enum led_brightness brightness)
3298 {
3299         struct tpacpi_led_classdev *data =
3300                 container_of(led_cdev,
3301                              struct tpacpi_led_classdev,
3302                              led_classdev);
3303         data->new_brightness = brightness;
3304         queue_work(tpacpi_wq, &data->work);
3305 }
3306
3307 static enum led_brightness light_sysfs_get(struct led_classdev *led_cdev)
3308 {
3309         return (light_get_status() == 1)? LED_FULL : LED_OFF;
3310 }
3311
3312 static struct tpacpi_led_classdev tpacpi_led_thinklight = {
3313         .led_classdev = {
3314                 .name           = "tpacpi::thinklight",
3315                 .brightness_set = &light_sysfs_set,
3316                 .brightness_get = &light_sysfs_get,
3317         }
3318 };
3319
3320 static int __init light_init(struct ibm_init_struct *iibm)
3321 {
3322         int rc = 0;
3323
3324         vdbg_printk(TPACPI_DBG_INIT, "initializing light subdriver\n");
3325
3326         TPACPI_ACPIHANDLE_INIT(ledb);
3327         TPACPI_ACPIHANDLE_INIT(lght);
3328         TPACPI_ACPIHANDLE_INIT(cmos);
3329         INIT_WORK(&tpacpi_led_thinklight.work, light_set_status_worker);
3330
3331         /* light not supported on 570, 600e/x, 770e, 770x, G4x, R30, R31 */
3332         tp_features.light = (cmos_handle || lght_handle) && !ledb_handle;
3333
3334         if (tp_features.light)
3335                 /* light status not supported on
3336                    570, 600e/x, 770e, 770x, G4x, R30, R31, R32, X20 */
3337                 tp_features.light_status =
3338                         acpi_evalf(ec_handle, NULL, "KBLT", "qv");
3339
3340         vdbg_printk(TPACPI_DBG_INIT, "light is %s\n",
3341                 str_supported(tp_features.light));
3342
3343         if (tp_features.light) {
3344                 rc = led_classdev_register(&tpacpi_pdev->dev,
3345                                            &tpacpi_led_thinklight.led_classdev);
3346         }
3347
3348         if (rc < 0) {
3349                 tp_features.light = 0;
3350                 tp_features.light_status = 0;
3351         } else {
3352                 rc = (tp_features.light)? 0 : 1;
3353         }
3354         return rc;
3355 }
3356
3357 static void light_exit(void)
3358 {
3359         led_classdev_unregister(&tpacpi_led_thinklight.led_classdev);
3360         if (work_pending(&tpacpi_led_thinklight.work))
3361                 flush_workqueue(tpacpi_wq);
3362 }
3363
3364 static int light_read(char *p)
3365 {
3366         int len = 0;
3367         int status;
3368
3369         if (!tp_features.light) {
3370                 len += sprintf(p + len, "status:\t\tnot supported\n");
3371         } else if (!tp_features.light_status) {
3372                 len += sprintf(p + len, "status:\t\tunknown\n");
3373                 len += sprintf(p + len, "commands:\ton, off\n");
3374         } else {
3375                 status = light_get_status();
3376                 if (status < 0)
3377                         return status;
3378                 len += sprintf(p + len, "status:\t\t%s\n", onoff(status, 0));
3379                 len += sprintf(p + len, "commands:\ton, off\n");
3380         }
3381
3382         return len;
3383 }
3384
3385 static int light_write(char *buf)
3386 {
3387         char *cmd;
3388         int newstatus = 0;
3389
3390         if (!tp_features.light)
3391                 return -ENODEV;
3392
3393         while ((cmd = next_cmd(&buf))) {
3394                 if (strlencmp(cmd, "on") == 0) {
3395                         newstatus = 1;
3396                 } else if (strlencmp(cmd, "off") == 0) {
3397                         newstatus = 0;
3398                 } else
3399                         return -EINVAL;
3400         }
3401
3402         return light_set_status(newstatus);
3403 }
3404
3405 static struct ibm_struct light_driver_data = {
3406         .name = "light",
3407         .read = light_read,
3408         .write = light_write,
3409         .exit = light_exit,
3410 };
3411
3412 /*************************************************************************
3413  * Dock subdriver
3414  */
3415
3416 #ifdef CONFIG_THINKPAD_ACPI_DOCK
3417
3418 static void dock_notify(struct ibm_struct *ibm, u32 event);
3419 static int dock_read(char *p);
3420 static int dock_write(char *buf);
3421
3422 TPACPI_HANDLE(dock, root, "\\_SB.GDCK", /* X30, X31, X40 */
3423            "\\_SB.PCI0.DOCK",   /* 600e/x,770e,770x,A2xm/p,T20-22,X20-21 */
3424            "\\_SB.PCI0.PCI1.DOCK",      /* all others */
3425            "\\_SB.PCI.ISA.SLCE",        /* 570 */
3426     );                          /* A21e,G4x,R30,R31,R32,R40,R40e,R50e */
3427
3428 /* don't list other alternatives as we install a notify handler on the 570 */
3429 TPACPI_HANDLE(pci, root, "\\_SB.PCI");  /* 570 */
3430
3431 static const struct acpi_device_id ibm_pci_device_ids[] = {
3432         {PCI_ROOT_HID_STRING, 0},
3433         {"", 0},
3434 };
3435
3436 static struct tp_acpi_drv_struct ibm_dock_acpidriver[2] = {
3437         {
3438          .notify = dock_notify,
3439          .handle = &dock_handle,
3440          .type = ACPI_SYSTEM_NOTIFY,
3441         },
3442         {
3443         /* THIS ONE MUST NEVER BE USED FOR DRIVER AUTOLOADING.
3444          * We just use it to get notifications of dock hotplug
3445          * in very old thinkpads */
3446          .hid = ibm_pci_device_ids,
3447          .notify = dock_notify,
3448          .handle = &pci_handle,
3449          .type = ACPI_SYSTEM_NOTIFY,
3450         },
3451 };
3452
3453 static struct ibm_struct dock_driver_data[2] = {
3454         {
3455          .name = "dock",
3456          .read = dock_read,
3457          .write = dock_write,
3458          .acpi = &ibm_dock_acpidriver[0],
3459         },
3460         {
3461          .name = "dock",
3462          .acpi = &ibm_dock_acpidriver[1],
3463         },
3464 };
3465
3466 #define dock_docked() (_sta(dock_handle) & 1)
3467
3468 static int __init dock_init(struct ibm_init_struct *iibm)
3469 {
3470         vdbg_printk(TPACPI_DBG_INIT, "initializing dock subdriver\n");
3471
3472         TPACPI_ACPIHANDLE_INIT(dock);
3473
3474         vdbg_printk(TPACPI_DBG_INIT, "dock is %s\n",
3475                 str_supported(dock_handle != NULL));
3476
3477         return (dock_handle)? 0 : 1;
3478 }
3479
3480 static int __init dock_init2(struct ibm_init_struct *iibm)
3481 {
3482         int dock2_needed;
3483
3484         vdbg_printk(TPACPI_DBG_INIT, "initializing dock subdriver part 2\n");
3485
3486         if (dock_driver_data[0].flags.acpi_driver_registered &&
3487             dock_driver_data[0].flags.acpi_notify_installed) {
3488                 TPACPI_ACPIHANDLE_INIT(pci);
3489                 dock2_needed = (pci_handle != NULL);
3490                 vdbg_printk(TPACPI_DBG_INIT,
3491                             "dock PCI handler for the TP 570 is %s\n",
3492                             str_supported(dock2_needed));
3493         } else {
3494                 vdbg_printk(TPACPI_DBG_INIT,
3495                 "dock subdriver part 2 not required\n");
3496                 dock2_needed = 0;
3497         }
3498
3499         return (dock2_needed)? 0 : 1;
3500 }
3501
3502 static void dock_notify(struct ibm_struct *ibm, u32 event)
3503 {
3504         int docked = dock_docked();
3505         int pci = ibm->acpi->hid && ibm->acpi->device &&
3506                 acpi_match_device_ids(ibm->acpi->device, ibm_pci_device_ids);
3507         int data;
3508
3509         if (event == 1 && !pci) /* 570 */
3510                 data = 1;       /* button */
3511         else if (event == 1 && pci)     /* 570 */
3512                 data = 3;       /* dock */
3513         else if (event == 3 && docked)
3514                 data = 1;       /* button */
3515         else if (event == 3 && !docked)
3516                 data = 2;       /* undock */
3517         else if (event == 0 && docked)
3518                 data = 3;       /* dock */
3519         else {
3520                 printk(TPACPI_ERR "unknown dock event %d, status %d\n",
3521                        event, _sta(dock_handle));
3522                 data = 0;       /* unknown */
3523         }
3524         acpi_bus_generate_proc_event(ibm->acpi->device, event, data);
3525         acpi_bus_generate_netlink_event(ibm->acpi->device->pnp.device_class,
3526                                           ibm->acpi->device->dev.bus_id,
3527                                           event, data);
3528 }
3529
3530 static int dock_read(char *p)
3531 {
3532         int len = 0;
3533         int docked = dock_docked();
3534
3535         if (!dock_handle)
3536                 len += sprintf(p + len, "status:\t\tnot supported\n");
3537         else if (!docked)
3538                 len += sprintf(p + len, "status:\t\tundocked\n");
3539         else {
3540                 len += sprintf(p + len, "status:\t\tdocked\n");
3541                 len += sprintf(p + len, "commands:\tdock, undock\n");
3542         }
3543
3544         return len;
3545 }
3546
3547 static int dock_write(char *buf)
3548 {
3549         char *cmd;
3550
3551         if (!dock_docked())
3552                 return -ENODEV;
3553
3554         while ((cmd = next_cmd(&buf))) {
3555                 if (strlencmp(cmd, "undock") == 0) {
3556                         if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 0) ||
3557                             !acpi_evalf(dock_handle, NULL, "_EJ0", "vd", 1))
3558                                 return -EIO;
3559                 } else if (strlencmp(cmd, "dock") == 0) {
3560                         if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 1))
3561                                 return -EIO;
3562                 } else
3563                         return -EINVAL;
3564         }
3565
3566         return 0;
3567 }
3568
3569 #endif /* CONFIG_THINKPAD_ACPI_DOCK */
3570
3571 /*************************************************************************
3572  * Bay subdriver
3573  */
3574
3575 #ifdef CONFIG_THINKPAD_ACPI_BAY
3576
3577 TPACPI_HANDLE(bay, root, "\\_SB.PCI.IDE.SECN.MAST",     /* 570 */
3578            "\\_SB.PCI0.IDE0.IDES.IDSM", /* 600e/x, 770e, 770x */
3579            "\\_SB.PCI0.SATA.SCND.MSTR", /* T60, X60, Z60 */
3580            "\\_SB.PCI0.IDE0.SCND.MSTR", /* all others */
3581            );                           /* A21e, R30, R31 */
3582 TPACPI_HANDLE(bay_ej, bay, "_EJ3",      /* 600e/x, A2xm/p, A3x */
3583            "_EJ0",              /* all others */
3584            );                   /* 570,A21e,G4x,R30,R31,R32,R40e,R50e */
3585 TPACPI_HANDLE(bay2, root, "\\_SB.PCI0.IDE0.PRIM.SLAV",  /* A3x, R32 */
3586            "\\_SB.PCI0.IDE0.IDEP.IDPS", /* 600e/x, 770e, 770x */
3587            );                           /* all others */
3588 TPACPI_HANDLE(bay2_ej, bay2, "_EJ3",    /* 600e/x, 770e, A3x */
3589            "_EJ0",                      /* 770x */
3590            );                           /* all others */
3591
3592 static int __init bay_init(struct ibm_init_struct *iibm)
3593 {
3594         vdbg_printk(TPACPI_DBG_INIT, "initializing bay subdriver\n");
3595
3596         TPACPI_ACPIHANDLE_INIT(bay);
3597         if (bay_handle)
3598                 TPACPI_ACPIHANDLE_INIT(bay_ej);
3599         TPACPI_ACPIHANDLE_INIT(bay2);
3600         if (bay2_handle)
3601                 TPACPI_ACPIHANDLE_INIT(bay2_ej);
3602
3603         tp_features.bay_status = bay_handle &&
3604                 acpi_evalf(bay_handle, NULL, "_STA", "qv");
3605         tp_features.bay_status2 = bay2_handle &&
3606                 acpi_evalf(bay2_handle, NULL, "_STA", "qv");
3607
3608         tp_features.bay_eject = bay_handle && bay_ej_handle &&
3609                 (strlencmp(bay_ej_path, "_EJ0") == 0 || experimental);
3610         tp_features.bay_eject2 = bay2_handle && bay2_ej_handle &&
3611                 (strlencmp(bay2_ej_path, "_EJ0") == 0 || experimental);
3612
3613         vdbg_printk(TPACPI_DBG_INIT,
3614                 "bay 1: status %s, eject %s; bay 2: status %s, eject %s\n",
3615                 str_supported(tp_features.bay_status),
3616                 str_supported(tp_features.bay_eject),
3617                 str_supported(tp_features.bay_status2),
3618                 str_supported(tp_features.bay_eject2));
3619
3620         return (tp_features.bay_status || tp_features.bay_eject ||
3621                 tp_features.bay_status2 || tp_features.bay_eject2)? 0 : 1;
3622 }
3623
3624 static void bay_notify(struct ibm_struct *ibm, u32 event)
3625 {
3626         acpi_bus_generate_proc_event(ibm->acpi->device, event, 0);
3627         acpi_bus_generate_netlink_event(ibm->acpi->device->pnp.device_class,
3628                                           ibm->acpi->device->dev.bus_id,
3629                                           event, 0);
3630 }
3631
3632 #define bay_occupied(b) (_sta(b##_handle) & 1)
3633
3634 static int bay_read(char *p)
3635 {
3636         int len = 0;
3637         int occupied = bay_occupied(bay);
3638         int occupied2 = bay_occupied(bay2);
3639         int eject, eject2;
3640
3641         len += sprintf(p + len, "status:\t\t%s\n",
3642                 tp_features.bay_status ?
3643                         (occupied ? "occupied" : "unoccupied") :
3644                                 "not supported");
3645         if (tp_features.bay_status2)
3646                 len += sprintf(p + len, "status2:\t%s\n", occupied2 ?
3647                                "occupied" : "unoccupied");
3648
3649         eject = tp_features.bay_eject && occupied;
3650         eject2 = tp_features.bay_eject2 && occupied2;
3651
3652         if (eject && eject2)
3653                 len += sprintf(p + len, "commands:\teject, eject2\n");
3654         else if (eject)
3655                 len += sprintf(p + len, "commands:\teject\n");
3656         else if (eject2)
3657                 len += sprintf(p + len, "commands:\teject2\n");
3658
3659         return len;
3660 }
3661
3662 static int bay_write(char *buf)
3663 {
3664         char *cmd;
3665
3666         if (!tp_features.bay_eject && !tp_features.bay_eject2)
3667                 return -ENODEV;
3668
3669         while ((cmd = next_cmd(&buf))) {
3670                 if (tp_features.bay_eject && strlencmp(cmd, "eject") == 0) {
3671                         if (!acpi_evalf(bay_ej_handle, NULL, NULL, "vd", 1))
3672                                 return -EIO;
3673                 } else if (tp_features.bay_eject2 &&
3674                            strlencmp(cmd, "eject2") == 0) {
3675                         if (!acpi_evalf(bay2_ej_handle, NULL, NULL, "vd", 1))
3676                                 return -EIO;
3677                 } else
3678                         return -EINVAL;
3679         }
3680
3681         return 0;
3682 }
3683
3684 static struct tp_acpi_drv_struct ibm_bay_acpidriver = {
3685         .notify = bay_notify,
3686         .handle = &bay_handle,
3687         .type = ACPI_SYSTEM_NOTIFY,
3688 };
3689
3690 static struct ibm_struct bay_driver_data = {
3691         .name = "bay",
3692         .read = bay_read,
3693         .write = bay_write,
3694         .acpi = &ibm_bay_acpidriver,
3695 };
3696
3697 #endif /* CONFIG_THINKPAD_ACPI_BAY */
3698
3699 /*************************************************************************
3700  * CMOS subdriver
3701  */
3702
3703 /* sysfs cmos_command -------------------------------------------------- */
3704 static ssize_t cmos_command_store(struct device *dev,
3705                             struct device_attribute *attr,
3706                             const char *buf, size_t count)
3707 {
3708         unsigned long cmos_cmd;
3709         int res;
3710
3711         if (parse_strtoul(buf, 21, &cmos_cmd))
3712                 return -EINVAL;
3713
3714         res = issue_thinkpad_cmos_command(cmos_cmd);
3715         return (res)? res : count;
3716 }
3717
3718 static struct device_attribute dev_attr_cmos_command =
3719         __ATTR(cmos_command, S_IWUSR, NULL, cmos_command_store);
3720
3721 /* --------------------------------------------------------------------- */
3722
3723 static int __init cmos_init(struct ibm_init_struct *iibm)
3724 {
3725         int res;
3726
3727         vdbg_printk(TPACPI_DBG_INIT,
3728                 "initializing cmos commands subdriver\n");
3729
3730         TPACPI_ACPIHANDLE_INIT(cmos);
3731
3732         vdbg_printk(TPACPI_DBG_INIT, "cmos commands are %s\n",
3733                 str_supported(cmos_handle != NULL));
3734
3735         res = device_create_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
3736         if (res)
3737                 return res;
3738
3739         return (cmos_handle)? 0 : 1;
3740 }
3741
3742 static void cmos_exit(void)
3743 {
3744         device_remove_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
3745 }
3746
3747 static int cmos_read(char *p)
3748 {
3749         int len = 0;
3750
3751         /* cmos not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
3752            R30, R31, T20-22, X20-21 */
3753         if (!cmos_handle)
3754                 len += sprintf(p + len, "status:\t\tnot supported\n");
3755         else {
3756                 len += sprintf(p + len, "status:\t\tsupported\n");
3757                 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-21)\n");
3758         }
3759
3760         return len;
3761 }
3762
3763 static int cmos_write(char *buf)
3764 {
3765         char *cmd;
3766         int cmos_cmd, res;
3767
3768         while ((cmd = next_cmd(&buf))) {
3769                 if (sscanf(cmd, "%u", &cmos_cmd) == 1 &&
3770                     cmos_cmd >= 0 && cmos_cmd <= 21) {
3771                         /* cmos_cmd set */
3772                 } else
3773                         return -EINVAL;
3774
3775                 res = issue_thinkpad_cmos_command(cmos_cmd);
3776                 if (res)
3777                         return res;
3778         }
3779
3780         return 0;
3781 }
3782
3783 static struct ibm_struct cmos_driver_data = {
3784         .name = "cmos",
3785         .read = cmos_read,
3786         .write = cmos_write,
3787         .exit = cmos_exit,
3788 };
3789
3790 /*************************************************************************
3791  * LED subdriver
3792  */
3793
3794 enum led_access_mode {
3795         TPACPI_LED_NONE = 0,
3796         TPACPI_LED_570, /* 570 */
3797         TPACPI_LED_OLD, /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
3798         TPACPI_LED_NEW, /* all others */
3799 };
3800
3801 enum {  /* For TPACPI_LED_OLD */
3802         TPACPI_LED_EC_HLCL = 0x0c,      /* EC reg to get led to power on */
3803         TPACPI_LED_EC_HLBL = 0x0d,      /* EC reg to blink a lit led */
3804         TPACPI_LED_EC_HLMS = 0x0e,      /* EC reg to select led to command */
3805 };
3806
3807 enum led_status_t {
3808         TPACPI_LED_OFF = 0,
3809         TPACPI_LED_ON,
3810         TPACPI_LED_BLINK,
3811 };
3812
3813 static enum led_access_mode led_supported;
3814
3815 TPACPI_HANDLE(led, ec, "SLED",  /* 570 */
3816            "SYSL",              /* 600e/x, 770e, 770x, A21e, A2xm/p, */
3817                                 /* T20-22, X20-21 */
3818            "LED",               /* all others */
3819            );                   /* R30, R31 */
3820
3821 #define TPACPI_LED_NUMLEDS 8
3822 static struct tpacpi_led_classdev *tpacpi_leds;
3823 static enum led_status_t tpacpi_led_state_cache[TPACPI_LED_NUMLEDS];
3824 static const char const *tpacpi_led_names[TPACPI_LED_NUMLEDS] = {
3825         /* there's a limit of 19 chars + NULL before 2.6.26 */
3826         "tpacpi::power",
3827         "tpacpi:orange:batt",
3828         "tpacpi:green:batt",
3829         "tpacpi::dock_active",
3830         "tpacpi::bay_active",
3831         "tpacpi::dock_batt",
3832         "tpacpi::unknown_led",
3833         "tpacpi::standby",
3834 };
3835
3836 static int led_get_status(unsigned int led)
3837 {
3838         int status;
3839         enum led_status_t led_s;
3840
3841         switch (led_supported) {
3842         case TPACPI_LED_570:
3843                 if (!acpi_evalf(ec_handle,
3844                                 &status, "GLED", "dd", 1 << led))
3845                         return -EIO;
3846                 led_s = (status == 0)?
3847                                 TPACPI_LED_OFF :
3848                                 ((status == 1)?
3849                                         TPACPI_LED_ON :
3850                                         TPACPI_LED_BLINK);
3851                 tpacpi_led_state_cache[led] = led_s;
3852                 return led_s;
3853         default:
3854                 return -ENXIO;
3855         }
3856
3857         /* not reached */
3858 }
3859
3860 static int led_set_status(unsigned int led, enum led_status_t ledstatus)
3861 {
3862         /* off, on, blink. Index is led_status_t */
3863         static const int const led_sled_arg1[] = { 0, 1, 3 };
3864         static const int const led_exp_hlbl[] = { 0, 0, 1 };    /* led# * */
3865         static const int const led_exp_hlcl[] = { 0, 1, 1 };    /* led# * */
3866         static const int const led_led_arg1[] = { 0, 0x80, 0xc0 };
3867
3868         int rc = 0;
3869
3870         switch (led_supported) {
3871         case TPACPI_LED_570:
3872                         /* 570 */
3873                         led = 1 << led;
3874                         if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
3875                                         led, led_sled_arg1[ledstatus]))
3876                                 rc = -EIO;
3877                         break;
3878         case TPACPI_LED_OLD:
3879                         /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */
3880                         led = 1 << led;
3881                         rc = ec_write(TPACPI_LED_EC_HLMS, led);
3882                         if (rc >= 0)
3883                                 rc = ec_write(TPACPI_LED_EC_HLBL,
3884                                               led * led_exp_hlbl[ledstatus]);
3885                         if (rc >= 0)
3886                                 rc = ec_write(TPACPI_LED_EC_HLCL,
3887                                               led * led_exp_hlcl[ledstatus]);
3888                         break;
3889         case TPACPI_LED_NEW:
3890                         /* all others */
3891                         if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
3892                                         led, led_led_arg1[ledstatus]))
3893                                 rc = -EIO;
3894                         break;
3895         default:
3896                 rc = -ENXIO;
3897         }
3898
3899         if (!rc)
3900                 tpacpi_led_state_cache[led] = ledstatus;
3901
3902         return rc;
3903 }
3904
3905 static void led_sysfs_set_status(unsigned int led,
3906                                  enum led_brightness brightness)
3907 {
3908         led_set_status(led,
3909                         (brightness == LED_OFF) ?
3910                         TPACPI_LED_OFF :
3911                         (tpacpi_led_state_cache[led] == TPACPI_LED_BLINK) ?
3912                                 TPACPI_LED_BLINK : TPACPI_LED_ON);
3913 }
3914
3915 static void led_set_status_worker(struct work_struct *work)
3916 {
3917         struct tpacpi_led_classdev *data =
3918                 container_of(work, struct tpacpi_led_classdev, work);
3919
3920         if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING))
3921                 led_sysfs_set_status(data->led, data->new_brightness);
3922 }
3923
3924 static void led_sysfs_set(struct led_classdev *led_cdev,
3925                         enum led_brightness brightness)
3926 {
3927         struct tpacpi_led_classdev *data = container_of(led_cdev,
3928                              struct tpacpi_led_classdev, led_classdev);
3929
3930         data->new_brightness = brightness;
3931         queue_work(tpacpi_wq, &data->work);
3932 }
3933
3934 static int led_sysfs_blink_set(struct led_classdev *led_cdev,
3935                         unsigned long *delay_on, unsigned long *delay_off)
3936 {
3937         struct tpacpi_led_classdev *data = container_of(led_cdev,
3938                              struct tpacpi_led_classdev, led_classdev);
3939
3940         /* Can we choose the flash rate? */
3941         if (*delay_on == 0 && *delay_off == 0) {
3942                 /* yes. set them to the hardware blink rate (1 Hz) */
3943                 *delay_on = 500; /* ms */
3944                 *delay_off = 500; /* ms */
3945         } else if ((*delay_on != 500) || (*delay_off != 500))
3946                 return -EINVAL;
3947
3948         data->new_brightness = TPACPI_LED_BLINK;
3949         queue_work(tpacpi_wq, &data->work);
3950
3951         return 0;
3952 }
3953
3954 static enum led_brightness led_sysfs_get(struct led_classdev *led_cdev)
3955 {
3956         int rc;
3957
3958         struct tpacpi_led_classdev *data = container_of(led_cdev,
3959                              struct tpacpi_led_classdev, led_classdev);
3960
3961         rc = led_get_status(data->led);
3962
3963         if (rc == TPACPI_LED_OFF || rc < 0)
3964                 rc = LED_OFF;   /* no error handling in led class :( */
3965         else
3966                 rc = LED_FULL;
3967
3968         return rc;
3969 }
3970
3971 static void led_exit(void)
3972 {
3973         unsigned int i;
3974
3975         for (i = 0; i < TPACPI_LED_NUMLEDS; i++) {
3976                 if (tpacpi_leds[i].led_classdev.name)
3977                         led_classdev_unregister(&tpacpi_leds[i].led_classdev);
3978         }
3979
3980         kfree(tpacpi_leds);
3981         tpacpi_leds = NULL;
3982 }
3983
3984 static int __init led_init(struct ibm_init_struct *iibm)
3985 {
3986         unsigned int i;
3987         int rc;
3988
3989         vdbg_printk(TPACPI_DBG_INIT, "initializing LED subdriver\n");
3990
3991         TPACPI_ACPIHANDLE_INIT(led);
3992
3993         if (!led_handle)
3994                 /* led not supported on R30, R31 */
3995                 led_supported = TPACPI_LED_NONE;
3996         else if (strlencmp(led_path, "SLED") == 0)
3997                 /* 570 */
3998                 led_supported = TPACPI_LED_570;
3999         else if (strlencmp(led_path, "SYSL") == 0)
4000                 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
4001                 led_supported = TPACPI_LED_OLD;
4002         else
4003                 /* all others */
4004                 led_supported = TPACPI_LED_NEW;
4005
4006         vdbg_printk(TPACPI_DBG_INIT, "LED commands are %s, mode %d\n",
4007                 str_supported(led_supported), led_supported);
4008
4009         tpacpi_leds = kzalloc(sizeof(*tpacpi_leds) * TPACPI_LED_NUMLEDS,
4010                               GFP_KERNEL);
4011         if (!tpacpi_leds) {
4012                 printk(TPACPI_ERR "Out of memory for LED data\n");
4013                 return -ENOMEM;
4014         }
4015
4016         for (i = 0; i < TPACPI_LED_NUMLEDS; i++) {
4017                 tpacpi_leds[i].led = i;
4018
4019                 tpacpi_leds[i].led_classdev.brightness_set = &led_sysfs_set;
4020                 tpacpi_leds[i].led_classdev.blink_set = &led_sysfs_blink_set;
4021                 if (led_supported == TPACPI_LED_570)
4022                         tpacpi_leds[i].led_classdev.brightness_get =
4023                                                         &led_sysfs_get;
4024
4025                 tpacpi_leds[i].led_classdev.name = tpacpi_led_names[i];
4026
4027                 INIT_WORK(&tpacpi_leds[i].work, led_set_status_worker);
4028
4029                 rc = led_classdev_register(&tpacpi_pdev->dev,
4030                                            &tpacpi_leds[i].led_classdev);
4031                 if (rc < 0) {
4032                         tpacpi_leds[i].led_classdev.name = NULL;
4033                         led_exit();
4034                         return rc;
4035                 }
4036         }
4037
4038         return (led_supported != TPACPI_LED_NONE)? 0 : 1;
4039 }
4040
4041 #define str_led_status(s) \
4042         ((s) == TPACPI_LED_OFF ? "off" : \
4043                 ((s) == TPACPI_LED_ON ? "on" : "blinking"))
4044
4045 static int led_read(char *p)
4046 {
4047         int len = 0;
4048
4049         if (!led_supported) {
4050                 len += sprintf(p + len, "status:\t\tnot supported\n");
4051                 return len;
4052         }
4053         len += sprintf(p + len, "status:\t\tsupported\n");
4054
4055         if (led_supported == TPACPI_LED_570) {
4056                 /* 570 */
4057                 int i, status;
4058                 for (i = 0; i < 8; i++) {
4059                         status = led_get_status(i);
4060                         if (status < 0)
4061                                 return -EIO;
4062                         len += sprintf(p + len, "%d:\t\t%s\n",
4063                                        i, str_led_status(status));
4064                 }
4065         }
4066
4067         len += sprintf(p + len, "commands:\t"
4068                        "<led> on, <led> off, <led> blink (<led> is 0-7)\n");
4069
4070         return len;
4071 }
4072
4073 static int led_write(char *buf)
4074 {
4075         char *cmd;
4076         int led, rc;
4077         enum led_status_t s;
4078
4079         if (!led_supported)
4080                 return -ENODEV;
4081
4082         while ((cmd = next_cmd(&buf))) {
4083                 if (sscanf(cmd, "%d", &led) != 1 || led < 0 || led > 7)
4084                         return -EINVAL;
4085
4086                 if (strstr(cmd, "off")) {
4087                         s = TPACPI_LED_OFF;
4088                 } else if (strstr(cmd, "on")) {
4089                         s = TPACPI_LED_ON;
4090                 } else if (strstr(cmd, "blink")) {
4091                         s = TPACPI_LED_BLINK;
4092                 } else {
4093                         return -EINVAL;
4094                 }
4095
4096                 rc = led_set_status(led, s);
4097                 if (rc < 0)
4098                         return rc;
4099         }
4100
4101         return 0;
4102 }
4103
4104 static struct ibm_struct led_driver_data = {
4105         .name = "led",
4106         .read = led_read,
4107         .write = led_write,
4108         .exit = led_exit,
4109 };
4110
4111 /*************************************************************************
4112  * Beep subdriver
4113  */
4114
4115 TPACPI_HANDLE(beep, ec, "BEEP");        /* all except R30, R31 */
4116
4117 static int __init beep_init(struct ibm_init_struct *iibm)
4118 {
4119         vdbg_printk(TPACPI_DBG_INIT, "initializing beep subdriver\n");
4120
4121         TPACPI_ACPIHANDLE_INIT(beep);
4122
4123         vdbg_printk(TPACPI_DBG_INIT, "beep is %s\n",
4124                 str_supported(beep_handle != NULL));
4125
4126         return (beep_handle)? 0 : 1;
4127 }
4128
4129 static int beep_read(char *p)
4130 {
4131         int len = 0;
4132
4133         if (!beep_handle)
4134                 len += sprintf(p + len, "status:\t\tnot supported\n");
4135         else {
4136                 len += sprintf(p + len, "status:\t\tsupported\n");
4137                 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-17)\n");
4138         }
4139
4140         return len;
4141 }
4142
4143 static int beep_write(char *buf)
4144 {
4145         char *cmd;
4146         int beep_cmd;
4147
4148         if (!beep_handle)
4149                 return -ENODEV;
4150
4151         while ((cmd = next_cmd(&buf))) {
4152                 if (sscanf(cmd, "%u", &beep_cmd) == 1 &&
4153                     beep_cmd >= 0 && beep_cmd <= 17) {
4154                         /* beep_cmd set */
4155                 } else
4156                         return -EINVAL;
4157                 if (!acpi_evalf(beep_handle, NULL, NULL, "vdd", beep_cmd, 0))
4158                         return -EIO;
4159         }
4160
4161         return 0;
4162 }
4163
4164 static struct ibm_struct beep_driver_data = {
4165         .name = "beep",
4166         .read = beep_read,
4167         .write = beep_write,
4168 };
4169
4170 /*************************************************************************
4171  * Thermal subdriver
4172  */
4173
4174 enum thermal_access_mode {
4175         TPACPI_THERMAL_NONE = 0,        /* No thermal support */
4176         TPACPI_THERMAL_ACPI_TMP07,      /* Use ACPI TMP0-7 */
4177         TPACPI_THERMAL_ACPI_UPDT,       /* Use ACPI TMP0-7 with UPDT */
4178         TPACPI_THERMAL_TPEC_8,          /* Use ACPI EC regs, 8 sensors */
4179         TPACPI_THERMAL_TPEC_16,         /* Use ACPI EC regs, 16 sensors */
4180 };
4181
4182 enum { /* TPACPI_THERMAL_TPEC_* */
4183         TP_EC_THERMAL_TMP0 = 0x78,      /* ACPI EC regs TMP 0..7 */
4184         TP_EC_THERMAL_TMP8 = 0xC0,      /* ACPI EC regs TMP 8..15 */
4185         TP_EC_THERMAL_TMP_NA = -128,    /* ACPI EC sensor not available */
4186 };
4187
4188 #define TPACPI_MAX_THERMAL_SENSORS 16   /* Max thermal sensors supported */
4189 struct ibm_thermal_sensors_struct {
4190         s32 temp[TPACPI_MAX_THERMAL_SENSORS];
4191 };
4192
4193 static enum thermal_access_mode thermal_read_mode;
4194
4195 /* idx is zero-based */
4196 static int thermal_get_sensor(int idx, s32 *value)
4197 {
4198         int t;
4199         s8 tmp;
4200         char tmpi[5];
4201
4202         t = TP_EC_THERMAL_TMP0;
4203
4204         switch (thermal_read_mode) {
4205 #if TPACPI_MAX_THERMAL_SENSORS >= 16
4206         case TPACPI_THERMAL_TPEC_16:
4207                 if (idx >= 8 && idx <= 15) {
4208                         t = TP_EC_THERMAL_TMP8;
4209                         idx -= 8;
4210                 }
4211                 /* fallthrough */
4212 #endif
4213         case TPACPI_THERMAL_TPEC_8:
4214                 if (idx <= 7) {
4215                         if (!acpi_ec_read(t + idx, &tmp))
4216                                 return -EIO;
4217                         *value = tmp * 1000;
4218                         return 0;
4219                 }
4220                 break;
4221
4222         case TPACPI_THERMAL_ACPI_UPDT:
4223                 if (idx <= 7) {
4224                         snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
4225                         if (!acpi_evalf(ec_handle, NULL, "UPDT", "v"))
4226                                 return -EIO;
4227                         if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
4228                                 return -EIO;
4229                         *value = (t - 2732) * 100;
4230                         return 0;
4231                 }
4232                 break;
4233
4234         case TPACPI_THERMAL_ACPI_TMP07:
4235                 if (idx <= 7) {
4236                         snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
4237                         if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
4238                                 return -EIO;
4239                         if (t > 127 || t < -127)
4240                                 t = TP_EC_THERMAL_TMP_NA;
4241                         *value = t * 1000;
4242                         return 0;
4243                 }
4244                 break;
4245
4246         case TPACPI_THERMAL_NONE:
4247         default:
4248                 return -ENOSYS;
4249         }
4250
4251         return -EINVAL;
4252 }
4253
4254 static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s)
4255 {
4256         int res, i;
4257         int n;
4258
4259         n = 8;
4260         i = 0;
4261
4262         if (!s)
4263                 return -EINVAL;
4264
4265         if (thermal_read_mode == TPACPI_THERMAL_TPEC_16)
4266                 n = 16;
4267
4268         for (i = 0 ; i < n; i++) {
4269                 res = thermal_get_sensor(i, &s->temp[i]);
4270                 if (res)
4271                         return res;
4272         }
4273
4274         return n;
4275 }
4276
4277 /* sysfs temp##_input -------------------------------------------------- */
4278
4279 static ssize_t thermal_temp_input_show(struct device *dev,
4280                            struct device_attribute *attr,
4281                            char *buf)
4282 {
4283         struct sensor_device_attribute *sensor_attr =
4284                                         to_sensor_dev_attr(attr);
4285         int idx = sensor_attr->index;
4286         s32 value;
4287         int res;
4288
4289         res = thermal_get_sensor(idx, &value);
4290         if (res)
4291                 return res;
4292         if (value == TP_EC_THERMAL_TMP_NA * 1000)
4293                 return -ENXIO;
4294
4295         return snprintf(buf, PAGE_SIZE, "%d\n", value);
4296 }
4297
4298 #define THERMAL_SENSOR_ATTR_TEMP(_idxA, _idxB) \
4299          SENSOR_ATTR(temp##_idxA##_input, S_IRUGO, \
4300                      thermal_temp_input_show, NULL, _idxB)
4301
4302 static struct sensor_device_attribute sensor_dev_attr_thermal_temp_input[] = {
4303         THERMAL_SENSOR_ATTR_TEMP(1, 0),
4304         THERMAL_SENSOR_ATTR_TEMP(2, 1),
4305         THERMAL_SENSOR_ATTR_TEMP(3, 2),
4306         THERMAL_SENSOR_ATTR_TEMP(4, 3),
4307         THERMAL_SENSOR_ATTR_TEMP(5, 4),
4308         THERMAL_SENSOR_ATTR_TEMP(6, 5),
4309         THERMAL_SENSOR_ATTR_TEMP(7, 6),
4310         THERMAL_SENSOR_ATTR_TEMP(8, 7),
4311         THERMAL_SENSOR_ATTR_TEMP(9, 8),
4312         THERMAL_SENSOR_ATTR_TEMP(10, 9),
4313         THERMAL_SENSOR_ATTR_TEMP(11, 10),
4314         THERMAL_SENSOR_ATTR_TEMP(12, 11),
4315         THERMAL_SENSOR_ATTR_TEMP(13, 12),
4316         THERMAL_SENSOR_ATTR_TEMP(14, 13),
4317         THERMAL_SENSOR_ATTR_TEMP(15, 14),
4318         THERMAL_SENSOR_ATTR_TEMP(16, 15),
4319 };
4320
4321 #define THERMAL_ATTRS(X) \
4322         &sensor_dev_attr_thermal_temp_input[X].dev_attr.attr
4323
4324 static struct attribute *thermal_temp_input_attr[] = {
4325         THERMAL_ATTRS(8),
4326         THERMAL_ATTRS(9),
4327         THERMAL_ATTRS(10),
4328         THERMAL_ATTRS(11),
4329         THERMAL_ATTRS(12),
4330         THERMAL_ATTRS(13),
4331         THERMAL_ATTRS(14),
4332         THERMAL_ATTRS(15),
4333         THERMAL_ATTRS(0),
4334         THERMAL_ATTRS(1),
4335         THERMAL_ATTRS(2),
4336         THERMAL_ATTRS(3),
4337         THERMAL_ATTRS(4),
4338         THERMAL_ATTRS(5),
4339         THERMAL_ATTRS(6),
4340         THERMAL_ATTRS(7),
4341         NULL
4342 };
4343
4344 static const struct attribute_group thermal_temp_input16_group = {
4345         .attrs = thermal_temp_input_attr
4346 };
4347
4348 static const struct attribute_group thermal_temp_input8_group = {
4349         .attrs = &thermal_temp_input_attr[8]
4350 };
4351
4352 #undef THERMAL_SENSOR_ATTR_TEMP
4353 #undef THERMAL_ATTRS
4354
4355 /* --------------------------------------------------------------------- */
4356
4357 static int __init thermal_init(struct ibm_init_struct *iibm)
4358 {
4359         u8 t, ta1, ta2;
4360         int i;
4361         int acpi_tmp7;
4362         int res;
4363
4364         vdbg_printk(TPACPI_DBG_INIT, "initializing thermal subdriver\n");
4365
4366         acpi_tmp7 = acpi_evalf(ec_handle, NULL, "TMP7", "qv");
4367
4368         if (thinkpad_id.ec_model) {
4369                 /*
4370                  * Direct EC access mode: sensors at registers
4371                  * 0x78-0x7F, 0xC0-0xC7.  Registers return 0x00 for
4372                  * non-implemented, thermal sensors return 0x80 when
4373                  * not available
4374                  */
4375
4376                 ta1 = ta2 = 0;
4377                 for (i = 0; i < 8; i++) {
4378                         if (acpi_ec_read(TP_EC_THERMAL_TMP0 + i, &t)) {
4379                                 ta1 |= t;
4380                         } else {
4381                                 ta1 = 0;
4382                                 break;
4383                         }
4384                         if (acpi_ec_read(TP_EC_THERMAL_TMP8 + i, &t)) {
4385                                 ta2 |= t;
4386                         } else {
4387                                 ta1 = 0;
4388                                 break;
4389                         }
4390                 }
4391                 if (ta1 == 0) {
4392                         /* This is sheer paranoia, but we handle it anyway */
4393                         if (acpi_tmp7) {
4394                                 printk(TPACPI_ERR
4395                                        "ThinkPad ACPI EC access misbehaving, "
4396                                        "falling back to ACPI TMPx access "
4397                                        "mode\n");
4398                                 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
4399                         } else {
4400                                 printk(TPACPI_ERR
4401                                        "ThinkPad ACPI EC access misbehaving, "
4402                                        "disabling thermal sensors access\n");
4403                                 thermal_read_mode = TPACPI_THERMAL_NONE;
4404                         }
4405                 } else {
4406                         thermal_read_mode =
4407                             (ta2 != 0) ?
4408                             TPACPI_THERMAL_TPEC_16 : TPACPI_THERMAL_TPEC_8;
4409                 }
4410         } else if (acpi_tmp7) {
4411                 if (acpi_evalf(ec_handle, NULL, "UPDT", "qv")) {
4412                         /* 600e/x, 770e, 770x */
4413                         thermal_read_mode = TPACPI_THERMAL_ACPI_UPDT;
4414                 } else {
4415                         /* Standard ACPI TMPx access, max 8 sensors */
4416                         thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
4417                 }
4418         } else {
4419                 /* temperatures not supported on 570, G4x, R30, R31, R32 */
4420                 thermal_read_mode = TPACPI_THERMAL_NONE;
4421         }
4422
4423         vdbg_printk(TPACPI_DBG_INIT, "thermal is %s, mode %d\n",
4424                 str_supported(thermal_read_mode != TPACPI_THERMAL_NONE),
4425                 thermal_read_mode);
4426
4427         switch (thermal_read_mode) {
4428         case TPACPI_THERMAL_TPEC_16:
4429                 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
4430                                 &thermal_temp_input16_group);
4431                 if (res)
4432                         return res;
4433                 break;
4434         case TPACPI_THERMAL_TPEC_8:
4435         case TPACPI_THERMAL_ACPI_TMP07:
4436         case TPACPI_THERMAL_ACPI_UPDT:
4437                 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
4438                                 &thermal_temp_input8_group);
4439                 if (res)
4440                         return res;
4441                 break;
4442         case TPACPI_THERMAL_NONE:
4443         default:
4444                 return 1;
4445         }
4446
4447         return 0;
4448 }
4449
4450 static void thermal_exit(void)
4451 {
4452         switch (thermal_read_mode) {
4453         case TPACPI_THERMAL_TPEC_16:
4454                 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
4455                                    &thermal_temp_input16_group);
4456                 break;
4457         case TPACPI_THERMAL_TPEC_8:
4458         case TPACPI_THERMAL_ACPI_TMP07:
4459         case TPACPI_THERMAL_ACPI_UPDT:
4460                 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
4461                                    &thermal_temp_input16_group);
4462                 break;
4463         case TPACPI_THERMAL_NONE:
4464         default:
4465                 break;
4466         }
4467 }
4468
4469 static int thermal_read(char *p)
4470 {
4471         int len = 0;
4472         int n, i;
4473         struct ibm_thermal_sensors_struct t;
4474
4475         n = thermal_get_sensors(&t);
4476         if (unlikely(n < 0))
4477                 return n;
4478
4479         len += sprintf(p + len, "temperatures:\t");
4480
4481         if (n > 0) {
4482                 for (i = 0; i < (n - 1); i++)
4483                         len += sprintf(p + len, "%d ", t.temp[i] / 1000);
4484                 len += sprintf(p + len, "%d\n", t.temp[i] / 1000);
4485         } else
4486                 len += sprintf(p + len, "not supported\n");
4487
4488         return len;
4489 }
4490
4491 static struct ibm_struct thermal_driver_data = {
4492         .name = "thermal",
4493         .read = thermal_read,
4494         .exit = thermal_exit,
4495 };
4496
4497 /*************************************************************************
4498  * EC Dump subdriver
4499  */
4500
4501 static u8 ecdump_regs[256];
4502
4503 static int ecdump_read(char *p)
4504 {
4505         int len = 0;
4506         int i, j;
4507         u8 v;
4508
4509         len += sprintf(p + len, "EC      "
4510                        " +00 +01 +02 +03 +04 +05 +06 +07"
4511                        " +08 +09 +0a +0b +0c +0d +0e +0f\n");
4512         for (i = 0; i < 256; i += 16) {
4513                 len += sprintf(p + len, "EC 0x%02x:", i);
4514                 for (j = 0; j < 16; j++) {
4515                         if (!acpi_ec_read(i + j, &v))
4516                                 break;
4517                         if (v != ecdump_regs[i + j])
4518                                 len += sprintf(p + len, " *%02x", v);
4519                         else
4520                                 len += sprintf(p + len, "  %02x", v);
4521                         ecdump_regs[i + j] = v;
4522                 }
4523                 len += sprintf(p + len, "\n");
4524                 if (j != 16)
4525                         break;
4526         }
4527
4528         /* These are way too dangerous to advertise openly... */
4529 #if 0
4530         len += sprintf(p + len, "commands:\t0x<offset> 0x<value>"
4531                        " (<offset> is 00-ff, <value> is 00-ff)\n");
4532         len += sprintf(p + len, "commands:\t0x<offset> <value>  "
4533                        " (<offset> is 00-ff, <value> is 0-255)\n");
4534 #endif
4535         return len;
4536 }
4537
4538 static int ecdump_write(char *buf)
4539 {
4540         char *cmd;
4541         int i, v;
4542
4543         while ((cmd = next_cmd(&buf))) {
4544                 if (sscanf(cmd, "0x%x 0x%x", &i, &v) == 2) {
4545                         /* i and v set */
4546                 } else if (sscanf(cmd, "0x%x %u", &i, &v) == 2) {
4547                         /* i and v set */
4548                 } else
4549                         return -EINVAL;
4550                 if (i >= 0 && i < 256 && v >= 0 && v < 256) {
4551                         if (!acpi_ec_write(i, v))
4552                                 return -EIO;
4553                 } else
4554                         return -EINVAL;
4555         }
4556
4557         return 0;
4558 }
4559
4560 static struct ibm_struct ecdump_driver_data = {
4561         .name = "ecdump",
4562         .read = ecdump_read,
4563         .write = ecdump_write,
4564         .flags.experimental = 1,
4565 };
4566
4567 /*************************************************************************
4568  * Backlight/brightness subdriver
4569  */
4570
4571 #define TPACPI_BACKLIGHT_DEV_NAME "thinkpad_screen"
4572
4573 enum {
4574         TP_EC_BACKLIGHT = 0x31,
4575
4576         /* TP_EC_BACKLIGHT bitmasks */
4577         TP_EC_BACKLIGHT_LVLMSK = 0x1F,
4578         TP_EC_BACKLIGHT_CMDMSK = 0xE0,
4579         TP_EC_BACKLIGHT_MAPSW = 0x20,
4580 };
4581
4582 static struct backlight_device *ibm_backlight_device;
4583 static int brightness_mode;
4584 static unsigned int brightness_enable = 2; /* 2 = auto, 0 = no, 1 = yes */
4585
4586 static struct mutex brightness_mutex;
4587
4588 /*
4589  * ThinkPads can read brightness from two places: EC 0x31, or
4590  * CMOS NVRAM byte 0x5E, bits 0-3.
4591  *
4592  * EC 0x31 has the following layout
4593  *   Bit 7: unknown function
4594  *   Bit 6: unknown function
4595  *   Bit 5: Z: honour scale changes, NZ: ignore scale changes
4596  *   Bit 4: must be set to zero to avoid problems
4597  *   Bit 3-0: backlight brightness level
4598  *
4599  * brightness_get_raw returns status data in the EC 0x31 layout
4600  */
4601 static int brightness_get_raw(int *status)
4602 {
4603         u8 lec = 0, lcmos = 0, level = 0;
4604
4605         if (brightness_mode & 1) {
4606                 if (!acpi_ec_read(TP_EC_BACKLIGHT, &lec))
4607                         return -EIO;
4608                 level = lec & TP_EC_BACKLIGHT_LVLMSK;
4609         };
4610         if (brightness_mode & 2) {
4611                 lcmos = (nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS)
4612                          & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
4613                         >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
4614                 lcmos &= (tp_features.bright_16levels)? 0x0f : 0x07;
4615                 level = lcmos;
4616         }
4617
4618         if (brightness_mode == 3) {
4619                 *status = lec;  /* Prefer EC, CMOS is just a backing store */
4620                 lec &= TP_EC_BACKLIGHT_LVLMSK;
4621                 if (lec == lcmos)
4622                         tp_warned.bright_cmos_ec_unsync = 0;
4623                 else {
4624                         if (!tp_warned.bright_cmos_ec_unsync) {
4625                                 printk(TPACPI_ERR
4626                                         "CMOS NVRAM (%u) and EC (%u) do not "
4627                                         "agree on display brightness level\n",
4628                                         (unsigned int) lcmos,
4629                                         (unsigned int) lec);
4630                                 tp_warned.bright_cmos_ec_unsync = 1;
4631                         }
4632                         return -EIO;
4633                 }
4634         } else {
4635                 *status = level;
4636         }
4637
4638         return 0;
4639 }
4640
4641 /* May return EINTR which can always be mapped to ERESTARTSYS */
4642 static int brightness_set(int value)
4643 {
4644         int cmos_cmd, inc, i, res;
4645         int current_value;
4646         int command_bits;
4647
4648         if (value > ((tp_features.bright_16levels)? 15 : 7) ||
4649             value < 0)
4650                 return -EINVAL;
4651
4652         res = mutex_lock_interruptible(&brightness_mutex);
4653         if (res < 0)
4654                 return res;
4655
4656         res = brightness_get_raw(&current_value);
4657         if (res < 0)
4658                 goto errout;
4659
4660         command_bits = current_value & TP_EC_BACKLIGHT_CMDMSK;
4661         current_value &= TP_EC_BACKLIGHT_LVLMSK;
4662
4663         cmos_cmd = value > current_value ?
4664                         TP_CMOS_BRIGHTNESS_UP :
4665                         TP_CMOS_BRIGHTNESS_DOWN;
4666         inc = (value > current_value)? 1 : -1;
4667
4668         res = 0;
4669         for (i = current_value; i != value; i += inc) {
4670                 if ((brightness_mode & 2) &&
4671                     issue_thinkpad_cmos_command(cmos_cmd)) {
4672                         res = -EIO;
4673                         goto errout;
4674                 }
4675                 if ((brightness_mode & 1) &&
4676                     !acpi_ec_write(TP_EC_BACKLIGHT,
4677                                    (i + inc) | command_bits)) {
4678                         res = -EIO;
4679                         goto errout;;
4680                 }
4681         }
4682
4683 errout:
4684         mutex_unlock(&brightness_mutex);
4685         return res;
4686 }
4687
4688 /* sysfs backlight class ----------------------------------------------- */
4689
4690 static int brightness_update_status(struct backlight_device *bd)
4691 {
4692         /* it is the backlight class's job (caller) to handle
4693          * EINTR and other errors properly */
4694         return brightness_set(
4695                 (bd->props.fb_blank == FB_BLANK_UNBLANK &&
4696                  bd->props.power == FB_BLANK_UNBLANK) ?
4697                                 bd->props.brightness : 0);
4698 }
4699
4700 static int brightness_get(struct backlight_device *bd)
4701 {
4702         int status, res;
4703
4704         res = brightness_get_raw(&status);
4705         if (res < 0)
4706                 return 0; /* FIXME: teach backlight about error handling */
4707
4708         return status & TP_EC_BACKLIGHT_LVLMSK;
4709 }
4710
4711 static struct backlight_ops ibm_backlight_data = {
4712         .get_brightness = brightness_get,
4713         .update_status  = brightness_update_status,
4714 };
4715
4716 /* --------------------------------------------------------------------- */
4717
4718 static int __init brightness_init(struct ibm_init_struct *iibm)
4719 {
4720         int b;
4721
4722         vdbg_printk(TPACPI_DBG_INIT, "initializing brightness subdriver\n");
4723
4724         mutex_init(&brightness_mutex);
4725
4726         /*
4727          * We always attempt to detect acpi support, so as to switch
4728          * Lenovo Vista BIOS to ACPI brightness mode even if we are not
4729          * going to publish a backlight interface
4730          */
4731         b = tpacpi_check_std_acpi_brightness_support();
4732         if (b > 0) {
4733                 if (thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO) {
4734                         printk(TPACPI_NOTICE
4735                                "Lenovo BIOS switched to ACPI backlight "
4736                                "control mode\n");
4737                 }
4738                 if (brightness_enable > 1) {
4739                         printk(TPACPI_NOTICE
4740                                "standard ACPI backlight interface "
4741                                "available, not loading native one...\n");
4742                         return 1;
4743                 }
4744         }
4745
4746         if (!brightness_enable) {
4747                 dbg_printk(TPACPI_DBG_INIT,
4748                            "brightness support disabled by "
4749                            "module parameter\n");
4750                 return 1;
4751         }
4752
4753         if (b > 16) {
4754                 printk(TPACPI_ERR
4755                        "Unsupported brightness interface, "
4756                        "please contact %s\n", TPACPI_MAIL);
4757                 return 1;
4758         }
4759         if (b == 16)
4760                 tp_features.bright_16levels = 1;
4761
4762         if (!brightness_mode) {
4763                 if (thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO)
4764                         brightness_mode = 2;
4765                 else
4766                         brightness_mode = 3;
4767
4768                 dbg_printk(TPACPI_DBG_INIT, "selected brightness_mode=%d\n",
4769                         brightness_mode);
4770         }
4771
4772         if (brightness_mode > 3)
4773                 return -EINVAL;
4774
4775         if (brightness_get_raw(&b) < 0)
4776                 return 1;
4777
4778         if (tp_features.bright_16levels)
4779                 printk(TPACPI_INFO
4780                        "detected a 16-level brightness capable ThinkPad\n");
4781
4782         ibm_backlight_device = backlight_device_register(
4783                                         TPACPI_BACKLIGHT_DEV_NAME, NULL, NULL,
4784                                         &ibm_backlight_data);
4785         if (IS_ERR(ibm_backlight_device)) {
4786                 printk(TPACPI_ERR "Could not register backlight device\n");
4787                 return PTR_ERR(ibm_backlight_device);
4788         }
4789         vdbg_printk(TPACPI_DBG_INIT, "brightness is supported\n");
4790
4791         ibm_backlight_device->props.max_brightness =
4792                                 (tp_features.bright_16levels)? 15 : 7;
4793         ibm_backlight_device->props.brightness = b & TP_EC_BACKLIGHT_LVLMSK;
4794         backlight_update_status(ibm_backlight_device);
4795
4796         return 0;
4797 }
4798
4799 static void brightness_exit(void)
4800 {
4801         if (ibm_backlight_device) {
4802                 vdbg_printk(TPACPI_DBG_EXIT,
4803                             "calling backlight_device_unregister()\n");
4804                 backlight_device_unregister(ibm_backlight_device);
4805                 ibm_backlight_device = NULL;
4806         }
4807 }
4808
4809 static int brightness_read(char *p)
4810 {
4811         int len = 0;
4812         int level;
4813
4814         level = brightness_get(NULL);
4815         if (level < 0) {
4816                 len += sprintf(p + len, "level:\t\tunreadable\n");
4817         } else {
4818                 len += sprintf(p + len, "level:\t\t%d\n", level);
4819                 len += sprintf(p + len, "commands:\tup, down\n");
4820                 len += sprintf(p + len, "commands:\tlevel <level>"
4821                                " (<level> is 0-%d)\n",
4822                                (tp_features.bright_16levels) ? 15 : 7);
4823         }
4824
4825         return len;
4826 }
4827
4828 static int brightness_write(char *buf)
4829 {
4830         int level;
4831         int rc;
4832         char *cmd;
4833         int max_level = (tp_features.bright_16levels) ? 15 : 7;
4834
4835         level = brightness_get(NULL);
4836         if (level < 0)
4837                 return level;
4838
4839         while ((cmd = next_cmd(&buf))) {
4840                 if (strlencmp(cmd, "up") == 0) {
4841                         if (level < max_level)
4842                                 level++;
4843                 } else if (strlencmp(cmd, "down") == 0) {
4844                         if (level > 0)
4845                                 level--;
4846                 } else if (sscanf(cmd, "level %d", &level) == 1 &&
4847                            level >= 0 && level <= max_level) {
4848                         /* new level set */
4849                 } else
4850                         return -EINVAL;
4851         }
4852
4853         /*
4854          * Now we know what the final level should be, so we try to set it.
4855          * Doing it this way makes the syscall restartable in case of EINTR
4856          */
4857         rc = brightness_set(level);
4858         return (rc == -EINTR)? ERESTARTSYS : rc;
4859 }
4860
4861 static struct ibm_struct brightness_driver_data = {
4862         .name = "brightness",
4863         .read = brightness_read,
4864         .write = brightness_write,
4865         .exit = brightness_exit,
4866 };
4867
4868 /*************************************************************************
4869  * Volume subdriver
4870  */
4871
4872 static int volume_offset = 0x30;
4873
4874 static int volume_read(char *p)
4875 {
4876         int len = 0;
4877         u8 level;
4878
4879         if (!acpi_ec_read(volume_offset, &level)) {
4880                 len += sprintf(p + len, "level:\t\tunreadable\n");
4881         } else {
4882                 len += sprintf(p + len, "level:\t\t%d\n", level & 0xf);
4883                 len += sprintf(p + len, "mute:\t\t%s\n", onoff(level, 6));
4884                 len += sprintf(p + len, "commands:\tup, down, mute\n");
4885                 len += sprintf(p + len, "commands:\tlevel <level>"
4886                                " (<level> is 0-15)\n");
4887         }
4888
4889         return len;
4890 }
4891
4892 static int volume_write(char *buf)
4893 {
4894         int cmos_cmd, inc, i;
4895         u8 level, mute;
4896         int new_level, new_mute;
4897         char *cmd;
4898
4899         while ((cmd = next_cmd(&buf))) {
4900                 if (!acpi_ec_read(volume_offset, &level))
4901                         return -EIO;
4902                 new_mute = mute = level & 0x40;
4903                 new_level = level = level & 0xf;
4904
4905                 if (strlencmp(cmd, "up") == 0) {
4906                         if (mute)
4907                                 new_mute = 0;
4908                         else
4909                                 new_level = level == 15 ? 15 : level + 1;
4910                 } else if (strlencmp(cmd, "down") == 0) {
4911                         if (mute)
4912                                 new_mute = 0;
4913                         else
4914                                 new_level = level == 0 ? 0 : level - 1;
4915                 } else if (sscanf(cmd, "level %d", &new_level) == 1 &&
4916                            new_level >= 0 && new_level <= 15) {
4917                         /* new_level set */
4918                 } else if (strlencmp(cmd, "mute") == 0) {
4919                         new_mute = 0x40;
4920                 } else
4921                         return -EINVAL;
4922
4923                 if (new_level != level) {
4924                         /* mute doesn't change */
4925
4926                         cmos_cmd = (new_level > level) ?
4927                                         TP_CMOS_VOLUME_UP : TP_CMOS_VOLUME_DOWN;
4928                         inc = new_level > level ? 1 : -1;
4929
4930                         if (mute && (issue_thinkpad_cmos_command(cmos_cmd) ||
4931                                      !acpi_ec_write(volume_offset, level)))
4932                                 return -EIO;
4933
4934                         for (i = level; i != new_level; i += inc)
4935                                 if (issue_thinkpad_cmos_command(cmos_cmd) ||
4936                                     !acpi_ec_write(volume_offset, i + inc))
4937                                         return -EIO;
4938
4939                         if (mute &&
4940                             (issue_thinkpad_cmos_command(TP_CMOS_VOLUME_MUTE) ||
4941                              !acpi_ec_write(volume_offset, new_level + mute))) {
4942                                 return -EIO;
4943                         }
4944                 }
4945
4946                 if (new_mute != mute) {
4947                         /* level doesn't change */
4948
4949                         cmos_cmd = (new_mute) ?
4950                                    TP_CMOS_VOLUME_MUTE : TP_CMOS_VOLUME_UP;
4951
4952                         if (issue_thinkpad_cmos_command(cmos_cmd) ||
4953                             !acpi_ec_write(volume_offset, level + new_mute))
4954                                 return -EIO;
4955                 }
4956         }
4957
4958         return 0;
4959 }
4960
4961 static struct ibm_struct volume_driver_data = {
4962         .name = "volume",
4963         .read = volume_read,
4964         .write = volume_write,
4965 };
4966
4967 /*************************************************************************
4968  * Fan subdriver
4969  */
4970
4971 /*
4972  * FAN ACCESS MODES
4973  *
4974  * TPACPI_FAN_RD_ACPI_GFAN:
4975  *      ACPI GFAN method: returns fan level
4976  *
4977  *      see TPACPI_FAN_WR_ACPI_SFAN
4978  *      EC 0x2f (HFSP) not available if GFAN exists
4979  *
4980  * TPACPI_FAN_WR_ACPI_SFAN:
4981  *      ACPI SFAN method: sets fan level, 0 (stop) to 7 (max)
4982  *
4983  *      EC 0x2f (HFSP) might be available *for reading*, but do not use
4984  *      it for writing.
4985  *
4986  * TPACPI_FAN_WR_TPEC:
4987  *      ThinkPad EC register 0x2f (HFSP): fan control loop mode
4988  *      Supported on almost all ThinkPads
4989  *
4990  *      Fan speed changes of any sort (including those caused by the
4991  *      disengaged mode) are usually done slowly by the firmware as the
4992  *      maximum ammount of fan duty cycle change per second seems to be
4993  *      limited.
4994  *
4995  *      Reading is not available if GFAN exists.
4996  *      Writing is not available if SFAN exists.
4997  *
4998  *      Bits
4999  *       7      automatic mode engaged;
5000  *              (default operation mode of the ThinkPad)
5001  *              fan level is ignored in this mode.
5002  *       6      full speed mode (takes precedence over bit 7);
5003  *              not available on all thinkpads.  May disable
5004  *              the tachometer while the fan controller ramps up
5005  *              the speed (which can take up to a few *minutes*).
5006  *              Speeds up fan to 100% duty-cycle, which is far above
5007  *              the standard RPM levels.  It is not impossible that
5008  *              it could cause hardware damage.
5009  *      5-3     unused in some models.  Extra bits for fan level
5010  *              in others, but still useless as all values above
5011  *              7 map to the same speed as level 7 in these models.
5012  *      2-0     fan level (0..7 usually)
5013  *                      0x00 = stop
5014  *                      0x07 = max (set when temperatures critical)
5015  *              Some ThinkPads may have other levels, see
5016  *              TPACPI_FAN_WR_ACPI_FANS (X31/X40/X41)
5017  *
5018  *      FIRMWARE BUG: on some models, EC 0x2f might not be initialized at
5019  *      boot. Apparently the EC does not intialize it, so unless ACPI DSDT
5020  *      does so, its initial value is meaningless (0x07).
5021  *
5022  *      For firmware bugs, refer to:
5023  *      http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
5024  *
5025  *      ----
5026  *
5027  *      ThinkPad EC register 0x84 (LSB), 0x85 (MSB):
5028  *      Main fan tachometer reading (in RPM)
5029  *
5030  *      This register is present on all ThinkPads with a new-style EC, and
5031  *      it is known not to be present on the A21m/e, and T22, as there is
5032  *      something else in offset 0x84 according to the ACPI DSDT.  Other
5033  *      ThinkPads from this same time period (and earlier) probably lack the
5034  *      tachometer as well.
5035  *
5036  *      Unfortunately a lot of ThinkPads with new-style ECs but whose firwmare
5037  *      was never fixed by IBM to report the EC firmware version string
5038  *      probably support the tachometer (like the early X models), so
5039  *      detecting it is quite hard.  We need more data to know for sure.
5040  *
5041  *      FIRMWARE BUG: always read 0x84 first, otherwise incorrect readings
5042  *      might result.
5043  *
5044  *      FIRMWARE BUG: may go stale while the EC is switching to full speed
5045  *      mode.
5046  *
5047  *      For firmware bugs, refer to:
5048  *      http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
5049  *
5050  * TPACPI_FAN_WR_ACPI_FANS:
5051  *      ThinkPad X31, X40, X41.  Not available in the X60.
5052  *
5053  *      FANS ACPI handle: takes three arguments: low speed, medium speed,
5054  *      high speed.  ACPI DSDT seems to map these three speeds to levels
5055  *      as follows: STOP LOW LOW MED MED HIGH HIGH HIGH HIGH
5056  *      (this map is stored on FAN0..FAN8 as "0,1,1,2,2,3,3,3,3")
5057  *
5058  *      The speeds are stored on handles
5059  *      (FANA:FAN9), (FANC:FANB), (FANE:FAND).
5060  *
5061  *      There are three default speed sets, acessible as handles:
5062  *      FS1L,FS1M,FS1H; FS2L,FS2M,FS2H; FS3L,FS3M,FS3H
5063  *
5064  *      ACPI DSDT switches which set is in use depending on various
5065  *      factors.
5066  *
5067  *      TPACPI_FAN_WR_TPEC is also available and should be used to
5068  *      command the fan.  The X31/X40/X41 seems to have 8 fan levels,
5069  *      but the ACPI tables just mention level 7.
5070  */
5071
5072 enum {                                  /* Fan control constants */
5073         fan_status_offset = 0x2f,       /* EC register 0x2f */
5074         fan_rpm_offset = 0x84,          /* EC register 0x84: LSB, 0x85 MSB (RPM)
5075                                          * 0x84 must be read before 0x85 */
5076
5077         TP_EC_FAN_FULLSPEED = 0x40,     /* EC fan mode: full speed */
5078         TP_EC_FAN_AUTO      = 0x80,     /* EC fan mode: auto fan control */
5079
5080         TPACPI_FAN_LAST_LEVEL = 0x100,  /* Use cached last-seen fan level */
5081 };
5082
5083 enum fan_status_access_mode {
5084         TPACPI_FAN_NONE = 0,            /* No fan status or control */
5085         TPACPI_FAN_RD_ACPI_GFAN,        /* Use ACPI GFAN */
5086         TPACPI_FAN_RD_TPEC,             /* Use ACPI EC regs 0x2f, 0x84-0x85 */
5087 };
5088
5089 enum fan_control_access_mode {
5090         TPACPI_FAN_WR_NONE = 0,         /* No fan control */
5091         TPACPI_FAN_WR_ACPI_SFAN,        /* Use ACPI SFAN */
5092         TPACPI_FAN_WR_TPEC,             /* Use ACPI EC reg 0x2f */
5093         TPACPI_FAN_WR_ACPI_FANS,        /* Use ACPI FANS and EC reg 0x2f */
5094 };
5095
5096 enum fan_control_commands {
5097         TPACPI_FAN_CMD_SPEED    = 0x0001,       /* speed command */
5098         TPACPI_FAN_CMD_LEVEL    = 0x0002,       /* level command  */
5099         TPACPI_FAN_CMD_ENABLE   = 0x0004,       /* enable/disable cmd,
5100                                                  * and also watchdog cmd */
5101 };
5102
5103 static int fan_control_allowed;
5104
5105 static enum fan_status_access_mode fan_status_access_mode;
5106 static enum fan_control_access_mode fan_control_access_mode;
5107 static enum fan_control_commands fan_control_commands;
5108
5109 static u8 fan_control_initial_status;
5110 static u8 fan_control_desired_level;
5111 static int fan_watchdog_maxinterval;
5112
5113 static struct mutex fan_mutex;
5114
5115 static void fan_watchdog_fire(struct work_struct *ignored);
5116 static DECLARE_DELAYED_WORK(fan_watchdog_task, fan_watchdog_fire);
5117
5118 TPACPI_HANDLE(fans, ec, "FANS");        /* X31, X40, X41 */
5119 TPACPI_HANDLE(gfan, ec, "GFAN", /* 570 */
5120            "\\FSPD",            /* 600e/x, 770e, 770x */
5121            );                   /* all others */
5122 TPACPI_HANDLE(sfan, ec, "SFAN", /* 570 */
5123            "JFNS",              /* 770x-JL */
5124            );                   /* all others */
5125
5126 /*
5127  * Call with fan_mutex held
5128  */
5129 static void fan_update_desired_level(u8 status)
5130 {
5131         if ((status &
5132              (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
5133                 if (status > 7)
5134                         fan_control_desired_level = 7;
5135                 else
5136                         fan_control_desired_level = status;
5137         }
5138 }
5139
5140 static int fan_get_status(u8 *status)
5141 {
5142         u8 s;
5143
5144         /* TODO:
5145          * Add TPACPI_FAN_RD_ACPI_FANS ? */
5146
5147         switch (fan_status_access_mode) {
5148         case TPACPI_FAN_RD_ACPI_GFAN:
5149                 /* 570, 600e/x, 770e, 770x */
5150
5151                 if (unlikely(!acpi_evalf(gfan_handle, &s, NULL, "d")))
5152                         return -EIO;
5153
5154                 if (likely(status))
5155                         *status = s & 0x07;
5156
5157                 break;
5158
5159         case TPACPI_FAN_RD_TPEC:
5160                 /* all except 570, 600e/x, 770e, 770x */
5161                 if (unlikely(!acpi_ec_read(fan_status_offset, &s)))
5162                         return -EIO;
5163
5164                 if (likely(status))
5165                         *status = s;
5166
5167                 break;
5168
5169         default:
5170                 return -ENXIO;
5171         }
5172
5173         return 0;
5174 }
5175
5176 static int fan_get_status_safe(u8 *status)
5177 {
5178         int rc;
5179         u8 s;
5180
5181         if (mutex_lock_interruptible(&fan_mutex))
5182                 return -ERESTARTSYS;
5183         rc = fan_get_status(&s);
5184         if (!rc)
5185                 fan_update_desired_level(s);
5186         mutex_unlock(&fan_mutex);
5187
5188         if (status)
5189                 *status = s;
5190
5191         return rc;
5192 }
5193
5194 static int fan_get_speed(unsigned int *speed)
5195 {
5196         u8 hi, lo;
5197
5198         switch (fan_status_access_mode) {
5199         case TPACPI_FAN_RD_TPEC:
5200                 /* all except 570, 600e/x, 770e, 770x */
5201                 if (unlikely(!acpi_ec_read(fan_rpm_offset, &lo) ||
5202                              !acpi_ec_read(fan_rpm_offset + 1, &hi)))
5203                         return -EIO;
5204
5205                 if (likely(speed))
5206                         *speed = (hi << 8) | lo;
5207
5208                 break;
5209
5210         default:
5211                 return -ENXIO;
5212         }
5213
5214         return 0;
5215 }
5216
5217 static int fan_set_level(int level)
5218 {
5219         if (!fan_control_allowed)
5220                 return -EPERM;
5221
5222         switch (fan_control_access_mode) {
5223         case TPACPI_FAN_WR_ACPI_SFAN:
5224                 if (level >= 0 && level <= 7) {
5225                         if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", level))
5226                                 return -EIO;
5227                 } else
5228                         return -EINVAL;
5229                 break;
5230
5231         case TPACPI_FAN_WR_ACPI_FANS:
5232         case TPACPI_FAN_WR_TPEC:
5233                 if ((level != TP_EC_FAN_AUTO) &&
5234                     (level != TP_EC_FAN_FULLSPEED) &&
5235                     ((level < 0) || (level > 7)))
5236                         return -EINVAL;
5237
5238                 /* safety net should the EC not support AUTO
5239                  * or FULLSPEED mode bits and just ignore them */
5240                 if (level & TP_EC_FAN_FULLSPEED)
5241                         level |= 7;     /* safety min speed 7 */
5242                 else if (level & TP_EC_FAN_AUTO)
5243                         level |= 4;     /* safety min speed 4 */
5244
5245                 if (!acpi_ec_write(fan_status_offset, level))
5246                         return -EIO;
5247                 else
5248                         tp_features.fan_ctrl_status_undef = 0;
5249                 break;
5250
5251         default:
5252                 return -ENXIO;
5253         }
5254         return 0;
5255 }
5256
5257 static int fan_set_level_safe(int level)
5258 {
5259         int rc;
5260
5261         if (!fan_control_allowed)
5262                 return -EPERM;
5263
5264         if (mutex_lock_interruptible(&fan_mutex))
5265                 return -ERESTARTSYS;
5266
5267         if (level == TPACPI_FAN_LAST_LEVEL)
5268                 level = fan_control_desired_level;
5269
5270         rc = fan_set_level(level);
5271         if (!rc)
5272                 fan_update_desired_level(level);
5273
5274         mutex_unlock(&fan_mutex);
5275         return rc;
5276 }
5277
5278 static int fan_set_enable(void)
5279 {
5280         u8 s;
5281         int rc;
5282
5283         if (!fan_control_allowed)
5284                 return -EPERM;
5285
5286         if (mutex_lock_interruptible(&fan_mutex))
5287                 return -ERESTARTSYS;
5288
5289         switch (fan_control_access_mode) {
5290         case TPACPI_FAN_WR_ACPI_FANS:
5291         case TPACPI_FAN_WR_TPEC:
5292                 rc = fan_get_status(&s);
5293                 if (rc < 0)
5294                         break;
5295
5296                 /* Don't go out of emergency fan mode */
5297                 if (s != 7) {
5298                         s &= 0x07;
5299                         s |= TP_EC_FAN_AUTO | 4; /* min fan speed 4 */
5300                 }
5301
5302                 if (!acpi_ec_write(fan_status_offset, s))
5303                         rc = -EIO;
5304                 else {
5305                         tp_features.fan_ctrl_status_undef = 0;
5306                         rc = 0;
5307                 }
5308                 break;
5309
5310         case TPACPI_FAN_WR_ACPI_SFAN:
5311                 rc = fan_get_status(&s);
5312                 if (rc < 0)
5313                         break;
5314
5315                 s &= 0x07;
5316
5317                 /* Set fan to at least level 4 */
5318                 s |= 4;
5319
5320                 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", s))
5321                         rc = -EIO;
5322                 else
5323                         rc = 0;
5324                 break;
5325
5326         default:
5327                 rc = -ENXIO;
5328         }
5329
5330         mutex_unlock(&fan_mutex);
5331         return rc;
5332 }
5333
5334 static int fan_set_disable(void)
5335 {
5336         int rc;
5337
5338         if (!fan_control_allowed)
5339                 return -EPERM;
5340
5341         if (mutex_lock_interruptible(&fan_mutex))
5342                 return -ERESTARTSYS;
5343
5344         rc = 0;
5345         switch (fan_control_access_mode) {
5346         case TPACPI_FAN_WR_ACPI_FANS:
5347         case TPACPI_FAN_WR_TPEC:
5348                 if (!acpi_ec_write(fan_status_offset, 0x00))
5349                         rc = -EIO;
5350                 else {
5351                         fan_control_desired_level = 0;
5352                         tp_features.fan_ctrl_status_undef = 0;
5353                 }
5354                 break;
5355
5356         case TPACPI_FAN_WR_ACPI_SFAN:
5357                 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", 0x00))
5358                         rc = -EIO;
5359                 else
5360                         fan_control_desired_level = 0;
5361                 break;
5362
5363         default:
5364                 rc = -ENXIO;
5365         }
5366
5367
5368         mutex_unlock(&fan_mutex);
5369         return rc;
5370 }
5371
5372 static int fan_set_speed(int speed)
5373 {
5374         int rc;
5375
5376         if (!fan_control_allowed)
5377                 return -EPERM;
5378
5379         if (mutex_lock_interruptible(&fan_mutex))
5380                 return -ERESTARTSYS;
5381
5382         rc = 0;
5383         switch (fan_control_access_mode) {
5384         case TPACPI_FAN_WR_ACPI_FANS:
5385                 if (speed >= 0 && speed <= 65535) {
5386                         if (!acpi_evalf(fans_handle, NULL, NULL, "vddd",
5387                                         speed, speed, speed))
5388                                 rc = -EIO;
5389                 } else
5390                         rc = -EINVAL;
5391                 break;
5392
5393         default:
5394                 rc = -ENXIO;
5395         }
5396
5397         mutex_unlock(&fan_mutex);
5398         return rc;
5399 }
5400
5401 static void fan_watchdog_reset(void)
5402 {
5403         static int fan_watchdog_active;
5404
5405         if (fan_control_access_mode == TPACPI_FAN_WR_NONE)
5406                 return;
5407
5408         if (fan_watchdog_active)
5409                 cancel_delayed_work(&fan_watchdog_task);
5410
5411         if (fan_watchdog_maxinterval > 0 &&
5412             tpacpi_lifecycle != TPACPI_LIFE_EXITING) {
5413                 fan_watchdog_active = 1;
5414                 if (!queue_delayed_work(tpacpi_wq, &fan_watchdog_task,
5415                                 msecs_to_jiffies(fan_watchdog_maxinterval
5416                                                  * 1000))) {
5417                         printk(TPACPI_ERR
5418                                "failed to queue the fan watchdog, "
5419                                "watchdog will not trigger\n");
5420                 }
5421         } else
5422                 fan_watchdog_active = 0;
5423 }
5424
5425 static void fan_watchdog_fire(struct work_struct *ignored)
5426 {
5427         int rc;
5428
5429         if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
5430                 return;
5431
5432         printk(TPACPI_NOTICE "fan watchdog: enabling fan\n");
5433         rc = fan_set_enable();
5434         if (rc < 0) {
5435                 printk(TPACPI_ERR "fan watchdog: error %d while enabling fan, "
5436                         "will try again later...\n", -rc);
5437                 /* reschedule for later */
5438                 fan_watchdog_reset();
5439         }
5440 }
5441
5442 /*
5443  * SYSFS fan layout: hwmon compatible (device)
5444  *
5445  * pwm*_enable:
5446  *      0: "disengaged" mode
5447  *      1: manual mode
5448  *      2: native EC "auto" mode (recommended, hardware default)
5449  *
5450  * pwm*: set speed in manual mode, ignored otherwise.
5451  *      0 is level 0; 255 is level 7. Intermediate points done with linear
5452  *      interpolation.
5453  *
5454  * fan*_input: tachometer reading, RPM
5455  *
5456  *
5457  * SYSFS fan layout: extensions
5458  *
5459  * fan_watchdog (driver):
5460  *      fan watchdog interval in seconds, 0 disables (default), max 120
5461  */
5462
5463 /* sysfs fan pwm1_enable ----------------------------------------------- */
5464 static ssize_t fan_pwm1_enable_show(struct device *dev,
5465                                     struct device_attribute *attr,
5466                                     char *buf)
5467 {
5468         int res, mode;
5469         u8 status;
5470
5471         res = fan_get_status_safe(&status);
5472         if (res)
5473                 return res;
5474
5475         if (unlikely(tp_features.fan_ctrl_status_undef)) {
5476                 if (status != fan_control_initial_status) {
5477                         tp_features.fan_ctrl_status_undef = 0;
5478                 } else {
5479                         /* Return most likely status. In fact, it
5480                          * might be the only possible status */
5481                         status = TP_EC_FAN_AUTO;
5482                 }
5483         }
5484
5485         if (status & TP_EC_FAN_FULLSPEED) {
5486                 mode = 0;
5487         } else if (status & TP_EC_FAN_AUTO) {
5488                 mode = 2;
5489         } else
5490                 mode = 1;
5491
5492         return snprintf(buf, PAGE_SIZE, "%d\n", mode);
5493 }
5494
5495 static ssize_t fan_pwm1_enable_store(struct device *dev,
5496                                      struct device_attribute *attr,
5497                                      const char *buf, size_t count)
5498 {
5499         unsigned long t;
5500         int res, level;
5501
5502         if (parse_strtoul(buf, 2, &t))
5503                 return -EINVAL;
5504
5505         switch (t) {
5506         case 0:
5507                 level = TP_EC_FAN_FULLSPEED;
5508                 break;
5509         case 1:
5510                 level = TPACPI_FAN_LAST_LEVEL;
5511                 break;
5512         case 2:
5513                 level = TP_EC_FAN_AUTO;
5514                 break;
5515         case 3:
5516                 /* reserved for software-controlled auto mode */
5517                 return -ENOSYS;
5518         default:
5519                 return -EINVAL;
5520         }
5521
5522         res = fan_set_level_safe(level);
5523         if (res == -ENXIO)
5524                 return -EINVAL;
5525         else if (res < 0)
5526                 return res;
5527
5528         fan_watchdog_reset();
5529
5530         return count;
5531 }
5532
5533 static struct device_attribute dev_attr_fan_pwm1_enable =
5534         __ATTR(pwm1_enable, S_IWUSR | S_IRUGO,
5535                 fan_pwm1_enable_show, fan_pwm1_enable_store);
5536
5537 /* sysfs fan pwm1 ------------------------------------------------------ */
5538 static ssize_t fan_pwm1_show(struct device *dev,
5539                              struct device_attribute *attr,
5540                              char *buf)
5541 {
5542         int res;
5543         u8 status;
5544
5545         res = fan_get_status_safe(&status);
5546         if (res)
5547                 return res;
5548
5549         if (unlikely(tp_features.fan_ctrl_status_undef)) {
5550                 if (status != fan_control_initial_status) {
5551                         tp_features.fan_ctrl_status_undef = 0;
5552                 } else {
5553                         status = TP_EC_FAN_AUTO;
5554                 }
5555         }
5556
5557         if ((status &
5558              (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) != 0)
5559                 status = fan_control_desired_level;
5560
5561         if (status > 7)
5562                 status = 7;
5563
5564         return snprintf(buf, PAGE_SIZE, "%u\n", (status * 255) / 7);
5565 }
5566
5567 static ssize_t fan_pwm1_store(struct device *dev,
5568                               struct device_attribute *attr,
5569                               const char *buf, size_t count)
5570 {
5571         unsigned long s;
5572         int rc;
5573         u8 status, newlevel;
5574
5575         if (parse_strtoul(buf, 255, &s))
5576                 return -EINVAL;
5577
5578         /* scale down from 0-255 to 0-7 */
5579         newlevel = (s >> 5) & 0x07;
5580
5581         if (mutex_lock_interruptible(&fan_mutex))
5582                 return -ERESTARTSYS;
5583
5584         rc = fan_get_status(&status);
5585         if (!rc && (status &
5586                     (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
5587                 rc = fan_set_level(newlevel);
5588                 if (rc == -ENXIO)
5589                         rc = -EINVAL;
5590                 else if (!rc) {
5591                         fan_update_desired_level(newlevel);
5592                         fan_watchdog_reset();
5593                 }
5594         }
5595
5596         mutex_unlock(&fan_mutex);
5597         return (rc)? rc : count;
5598 }
5599
5600 static struct device_attribute dev_attr_fan_pwm1 =
5601         __ATTR(pwm1, S_IWUSR | S_IRUGO,
5602                 fan_pwm1_show, fan_pwm1_store);
5603
5604 /* sysfs fan fan1_input ------------------------------------------------ */
5605 static ssize_t fan_fan1_input_show(struct device *dev,
5606                            struct device_attribute *attr,
5607                            char *buf)
5608 {
5609         int res;
5610         unsigned int speed;
5611
5612         res = fan_get_speed(&speed);
5613         if (res < 0)
5614                 return res;
5615
5616         return snprintf(buf, PAGE_SIZE, "%u\n", speed);
5617 }
5618
5619 static struct device_attribute dev_attr_fan_fan1_input =
5620         __ATTR(fan1_input, S_IRUGO,
5621                 fan_fan1_input_show, NULL);
5622
5623 /* sysfs fan fan_watchdog (hwmon driver) ------------------------------- */
5624 static ssize_t fan_fan_watchdog_show(struct device_driver *drv,
5625                                      char *buf)
5626 {
5627         return snprintf(buf, PAGE_SIZE, "%u\n", fan_watchdog_maxinterval);
5628 }
5629
5630 static ssize_t fan_fan_watchdog_store(struct device_driver *drv,
5631                                       const char *buf, size_t count)
5632 {
5633         unsigned long t;
5634
5635         if (parse_strtoul(buf, 120, &t))
5636                 return -EINVAL;
5637
5638         if (!fan_control_allowed)
5639                 return -EPERM;
5640
5641         fan_watchdog_maxinterval = t;
5642         fan_watchdog_reset();
5643
5644         return count;
5645 }
5646
5647 static DRIVER_ATTR(fan_watchdog, S_IWUSR | S_IRUGO,
5648                 fan_fan_watchdog_show, fan_fan_watchdog_store);
5649
5650 /* --------------------------------------------------------------------- */
5651 static struct attribute *fan_attributes[] = {
5652         &dev_attr_fan_pwm1_enable.attr, &dev_attr_fan_pwm1.attr,
5653         &dev_attr_fan_fan1_input.attr,
5654         NULL
5655 };
5656
5657 static const struct attribute_group fan_attr_group = {
5658         .attrs = fan_attributes,
5659 };
5660
5661 static int __init fan_init(struct ibm_init_struct *iibm)
5662 {
5663         int rc;
5664
5665         vdbg_printk(TPACPI_DBG_INIT, "initializing fan subdriver\n");
5666
5667         mutex_init(&fan_mutex);
5668         fan_status_access_mode = TPACPI_FAN_NONE;
5669         fan_control_access_mode = TPACPI_FAN_WR_NONE;
5670         fan_control_commands = 0;
5671         fan_watchdog_maxinterval = 0;
5672         tp_features.fan_ctrl_status_undef = 0;
5673         fan_control_desired_level = 7;
5674
5675         TPACPI_ACPIHANDLE_INIT(fans);
5676         TPACPI_ACPIHANDLE_INIT(gfan);
5677         TPACPI_ACPIHANDLE_INIT(sfan);
5678
5679         if (gfan_handle) {
5680                 /* 570, 600e/x, 770e, 770x */
5681                 fan_status_access_mode = TPACPI_FAN_RD_ACPI_GFAN;
5682         } else {
5683                 /* all other ThinkPads: note that even old-style
5684                  * ThinkPad ECs supports the fan control register */
5685                 if (likely(acpi_ec_read(fan_status_offset,
5686                                         &fan_control_initial_status))) {
5687                         fan_status_access_mode = TPACPI_FAN_RD_TPEC;
5688
5689                         /* In some ThinkPads, neither the EC nor the ACPI
5690                          * DSDT initialize the fan status, and it ends up
5691                          * being set to 0x07 when it *could* be either
5692                          * 0x07 or 0x80.
5693                          *
5694                          * Enable for TP-1Y (T43), TP-78 (R51e),
5695                          * TP-76 (R52), TP-70 (T43, R52), which are known
5696                          * to be buggy. */
5697                         if (fan_control_initial_status == 0x07) {
5698                                 switch (thinkpad_id.ec_model) {
5699                                 case 0x5931: /* TP-1Y */
5700                                 case 0x3837: /* TP-78 */
5701                                 case 0x3637: /* TP-76 */
5702                                 case 0x3037: /* TP-70 */
5703                                         printk(TPACPI_NOTICE
5704                                                "fan_init: initial fan status "
5705                                                "is unknown, assuming it is "
5706                                                "in auto mode\n");
5707                                         tp_features.fan_ctrl_status_undef = 1;
5708                                         ;;
5709                                 }
5710                         }
5711                 } else {
5712                         printk(TPACPI_ERR
5713                                "ThinkPad ACPI EC access misbehaving, "
5714                                "fan status and control unavailable\n");
5715                         return 1;
5716                 }
5717         }
5718
5719         if (sfan_handle) {
5720                 /* 570, 770x-JL */
5721                 fan_control_access_mode = TPACPI_FAN_WR_ACPI_SFAN;
5722                 fan_control_commands |=
5723                     TPACPI_FAN_CMD_LEVEL | TPACPI_FAN_CMD_ENABLE;
5724         } else {
5725                 if (!gfan_handle) {
5726                         /* gfan without sfan means no fan control */
5727                         /* all other models implement TP EC 0x2f control */
5728
5729                         if (fans_handle) {
5730                                 /* X31, X40, X41 */
5731                                 fan_control_access_mode =
5732                                     TPACPI_FAN_WR_ACPI_FANS;
5733                                 fan_control_commands |=
5734                                     TPACPI_FAN_CMD_SPEED |
5735                                     TPACPI_FAN_CMD_LEVEL |
5736                                     TPACPI_FAN_CMD_ENABLE;
5737                         } else {
5738                                 fan_control_access_mode = TPACPI_FAN_WR_TPEC;
5739                                 fan_control_commands |=
5740                                     TPACPI_FAN_CMD_LEVEL |
5741                                     TPACPI_FAN_CMD_ENABLE;
5742                         }
5743                 }
5744         }
5745
5746         vdbg_printk(TPACPI_DBG_INIT, "fan is %s, modes %d, %d\n",
5747                 str_supported(fan_status_access_mode != TPACPI_FAN_NONE ||
5748                   fan_control_access_mode != TPACPI_FAN_WR_NONE),
5749                 fan_status_access_mode, fan_control_access_mode);
5750
5751         /* fan control master switch */
5752         if (!fan_control_allowed) {
5753                 fan_control_access_mode = TPACPI_FAN_WR_NONE;
5754                 fan_control_commands = 0;
5755                 dbg_printk(TPACPI_DBG_INIT,
5756                            "fan control features disabled by parameter\n");
5757         }
5758
5759         /* update fan_control_desired_level */
5760         if (fan_status_access_mode != TPACPI_FAN_NONE)
5761                 fan_get_status_safe(NULL);
5762
5763         if (fan_status_access_mode != TPACPI_FAN_NONE ||
5764             fan_control_access_mode != TPACPI_FAN_WR_NONE) {
5765                 rc = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
5766                                          &fan_attr_group);
5767                 if (!(rc < 0))
5768                         rc = driver_create_file(&tpacpi_hwmon_pdriver.driver,
5769                                         &driver_attr_fan_watchdog);
5770                 if (rc < 0)
5771                         return rc;
5772                 return 0;
5773         } else
5774                 return 1;
5775 }
5776
5777 static void fan_exit(void)
5778 {
5779         vdbg_printk(TPACPI_DBG_EXIT,
5780                     "cancelling any pending fan watchdog tasks\n");
5781
5782         /* FIXME: can we really do this unconditionally? */
5783         sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj, &fan_attr_group);
5784         driver_remove_file(&tpacpi_hwmon_pdriver.driver,
5785                            &driver_attr_fan_watchdog);
5786
5787         cancel_delayed_work(&fan_watchdog_task);
5788         flush_workqueue(tpacpi_wq);
5789 }
5790
5791 static int fan_read(char *p)
5792 {
5793         int len = 0;
5794         int rc;
5795         u8 status;
5796         unsigned int speed = 0;
5797
5798         switch (fan_status_access_mode) {
5799         case TPACPI_FAN_RD_ACPI_GFAN:
5800                 /* 570, 600e/x, 770e, 770x */
5801                 rc = fan_get_status_safe(&status);
5802                 if (rc < 0)
5803                         return rc;
5804
5805                 len += sprintf(p + len, "status:\t\t%s\n"
5806                                "level:\t\t%d\n",
5807                                (status != 0) ? "enabled" : "disabled", status);
5808                 break;
5809
5810         case TPACPI_FAN_RD_TPEC:
5811                 /* all except 570, 600e/x, 770e, 770x */
5812                 rc = fan_get_status_safe(&status);
5813                 if (rc < 0)
5814                         return rc;
5815
5816                 if (unlikely(tp_features.fan_ctrl_status_undef)) {
5817                         if (status != fan_control_initial_status)
5818                                 tp_features.fan_ctrl_status_undef = 0;
5819                         else
5820                                 /* Return most likely status. In fact, it
5821                                  * might be the only possible status */
5822                                 status = TP_EC_FAN_AUTO;
5823                 }
5824
5825                 len += sprintf(p + len, "status:\t\t%s\n",
5826                                (status != 0) ? "enabled" : "disabled");
5827
5828                 rc = fan_get_speed(&speed);
5829                 if (rc < 0)
5830                         return rc;
5831
5832                 len += sprintf(p + len, "speed:\t\t%d\n", speed);
5833
5834                 if (status & TP_EC_FAN_FULLSPEED)
5835                         /* Disengaged mode takes precedence */
5836                         len += sprintf(p + len, "level:\t\tdisengaged\n");
5837                 else if (status & TP_EC_FAN_AUTO)
5838                         len += sprintf(p + len, "level:\t\tauto\n");
5839                 else
5840                         len += sprintf(p + len, "level:\t\t%d\n", status);
5841                 break;
5842
5843         case TPACPI_FAN_NONE:
5844         default:
5845                 len += sprintf(p + len, "status:\t\tnot supported\n");
5846         }
5847
5848         if (fan_control_commands & TPACPI_FAN_CMD_LEVEL) {
5849                 len += sprintf(p + len, "commands:\tlevel <level>");
5850
5851                 switch (fan_control_access_mode) {
5852                 case TPACPI_FAN_WR_ACPI_SFAN:
5853                         len += sprintf(p + len, " (<level> is 0-7)\n");
5854                         break;
5855
5856                 default:
5857                         len += sprintf(p + len, " (<level> is 0-7, "
5858                                        "auto, disengaged, full-speed)\n");
5859                         break;
5860                 }
5861         }
5862
5863         if (fan_control_commands & TPACPI_FAN_CMD_ENABLE)
5864                 len += sprintf(p + len, "commands:\tenable, disable\n"
5865                                "commands:\twatchdog <timeout> (<timeout> "
5866                                "is 0 (off), 1-120 (seconds))\n");
5867
5868         if (fan_control_commands & TPACPI_FAN_CMD_SPEED)
5869                 len += sprintf(p + len, "commands:\tspeed <speed>"
5870                                " (<speed> is 0-65535)\n");
5871
5872         return len;
5873 }
5874
5875 static int fan_write_cmd_level(const char *cmd, int *rc)
5876 {
5877         int level;
5878
5879         if (strlencmp(cmd, "level auto") == 0)
5880                 level = TP_EC_FAN_AUTO;
5881         else if ((strlencmp(cmd, "level disengaged") == 0) |
5882                         (strlencmp(cmd, "level full-speed") == 0))
5883                 level = TP_EC_FAN_FULLSPEED;
5884         else if (sscanf(cmd, "level %d", &level) != 1)
5885                 return 0;
5886
5887         *rc = fan_set_level_safe(level);
5888         if (*rc == -ENXIO)
5889                 printk(TPACPI_ERR "level command accepted for unsupported "
5890                        "access mode %d", fan_control_access_mode);
5891
5892         return 1;
5893 }
5894
5895 static int fan_write_cmd_enable(const char *cmd, int *rc)
5896 {
5897         if (strlencmp(cmd, "enable") != 0)
5898                 return 0;
5899
5900         *rc = fan_set_enable();
5901         if (*rc == -ENXIO)
5902                 printk(TPACPI_ERR "enable command accepted for unsupported "
5903                        "access mode %d", fan_control_access_mode);
5904
5905         return 1;
5906 }
5907
5908 static int fan_write_cmd_disable(const char *cmd, int *rc)
5909 {
5910         if (strlencmp(cmd, "disable") != 0)
5911                 return 0;
5912
5913         *rc = fan_set_disable();
5914         if (*rc == -ENXIO)
5915                 printk(TPACPI_ERR "disable command accepted for unsupported "
5916                        "access mode %d", fan_control_access_mode);
5917
5918         return 1;
5919 }
5920
5921 static int fan_write_cmd_speed(const char *cmd, int *rc)
5922 {
5923         int speed;
5924
5925         /* TODO:
5926          * Support speed <low> <medium> <high> ? */
5927
5928         if (sscanf(cmd, "speed %d", &speed) != 1)
5929                 return 0;
5930
5931         *rc = fan_set_speed(speed);
5932         if (*rc == -ENXIO)
5933                 printk(TPACPI_ERR "speed command accepted for unsupported "
5934                        "access mode %d", fan_control_access_mode);
5935
5936         return 1;
5937 }
5938
5939 static int fan_write_cmd_watchdog(const char *cmd, int *rc)
5940 {
5941         int interval;
5942
5943         if (sscanf(cmd, "watchdog %d", &interval) != 1)
5944                 return 0;
5945
5946         if (interval < 0 || interval > 120)
5947                 *rc = -EINVAL;
5948         else
5949                 fan_watchdog_maxinterval = interval;
5950
5951         return 1;
5952 }
5953
5954 static int fan_write(char *buf)
5955 {
5956         char *cmd;
5957         int rc = 0;
5958
5959         while (!rc && (cmd = next_cmd(&buf))) {
5960                 if (!((fan_control_commands & TPACPI_FAN_CMD_LEVEL) &&
5961                       fan_write_cmd_level(cmd, &rc)) &&
5962                     !((fan_control_commands & TPACPI_FAN_CMD_ENABLE) &&
5963                       (fan_write_cmd_enable(cmd, &rc) ||
5964                        fan_write_cmd_disable(cmd, &rc) ||
5965                        fan_write_cmd_watchdog(cmd, &rc))) &&
5966                     !((fan_control_commands & TPACPI_FAN_CMD_SPEED) &&
5967                       fan_write_cmd_speed(cmd, &rc))
5968                     )
5969                         rc = -EINVAL;
5970                 else if (!rc)
5971                         fan_watchdog_reset();
5972         }
5973
5974         return rc;
5975 }
5976
5977 static struct ibm_struct fan_driver_data = {
5978         .name = "fan",
5979         .read = fan_read,
5980         .write = fan_write,
5981         .exit = fan_exit,
5982 };
5983
5984 /****************************************************************************
5985  ****************************************************************************
5986  *
5987  * Infrastructure
5988  *
5989  ****************************************************************************
5990  ****************************************************************************/
5991
5992 /* sysfs name ---------------------------------------------------------- */
5993 static ssize_t thinkpad_acpi_pdev_name_show(struct device *dev,
5994                            struct device_attribute *attr,
5995                            char *buf)
5996 {
5997         return snprintf(buf, PAGE_SIZE, "%s\n", TPACPI_NAME);
5998 }
5999
6000 static struct device_attribute dev_attr_thinkpad_acpi_pdev_name =
6001         __ATTR(name, S_IRUGO, thinkpad_acpi_pdev_name_show, NULL);
6002
6003 /* --------------------------------------------------------------------- */
6004
6005 /* /proc support */
6006 static struct proc_dir_entry *proc_dir;
6007
6008 /*
6009  * Module and infrastructure proble, init and exit handling
6010  */
6011
6012 static int force_load;
6013
6014 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
6015 static const char * __init str_supported(int is_supported)
6016 {
6017         static char text_unsupported[] __initdata = "not supported";
6018
6019         return (is_supported)? &text_unsupported[4] : &text_unsupported[0];
6020 }
6021 #endif /* CONFIG_THINKPAD_ACPI_DEBUG */
6022
6023 static void ibm_exit(struct ibm_struct *ibm)
6024 {
6025         dbg_printk(TPACPI_DBG_EXIT, "removing %s\n", ibm->name);
6026
6027         list_del_init(&ibm->all_drivers);
6028
6029         if (ibm->flags.acpi_notify_installed) {
6030                 dbg_printk(TPACPI_DBG_EXIT,
6031                         "%s: acpi_remove_notify_handler\n", ibm->name);
6032                 BUG_ON(!ibm->acpi);
6033                 acpi_remove_notify_handler(*ibm->acpi->handle,
6034                                            ibm->acpi->type,
6035                                            dispatch_acpi_notify);
6036                 ibm->flags.acpi_notify_installed = 0;
6037                 ibm->flags.acpi_notify_installed = 0;
6038         }
6039
6040         if (ibm->flags.proc_created) {
6041                 dbg_printk(TPACPI_DBG_EXIT,
6042                         "%s: remove_proc_entry\n", ibm->name);
6043                 remove_proc_entry(ibm->name, proc_dir);
6044                 ibm->flags.proc_created = 0;
6045         }
6046
6047         if (ibm->flags.acpi_driver_registered) {
6048                 dbg_printk(TPACPI_DBG_EXIT,
6049                         "%s: acpi_bus_unregister_driver\n", ibm->name);
6050                 BUG_ON(!ibm->acpi);
6051                 acpi_bus_unregister_driver(ibm->acpi->driver);
6052                 kfree(ibm->acpi->driver);
6053                 ibm->acpi->driver = NULL;
6054                 ibm->flags.acpi_driver_registered = 0;
6055         }
6056
6057         if (ibm->flags.init_called && ibm->exit) {
6058                 ibm->exit();
6059                 ibm->flags.init_called = 0;
6060         }
6061
6062         dbg_printk(TPACPI_DBG_INIT, "finished removing %s\n", ibm->name);
6063 }
6064
6065 static int __init ibm_init(struct ibm_init_struct *iibm)
6066 {
6067         int ret;
6068         struct ibm_struct *ibm = iibm->data;
6069         struct proc_dir_entry *entry;
6070
6071         BUG_ON(ibm == NULL);
6072
6073         INIT_LIST_HEAD(&ibm->all_drivers);
6074
6075         if (ibm->flags.experimental && !experimental)
6076                 return 0;
6077
6078         dbg_printk(TPACPI_DBG_INIT,
6079                 "probing for %s\n", ibm->name);
6080
6081         if (iibm->init) {
6082                 ret = iibm->init(iibm);
6083                 if (ret > 0)
6084                         return 0;       /* probe failed */
6085                 if (ret)
6086                         return ret;
6087
6088                 ibm->flags.init_called = 1;
6089         }
6090
6091         if (ibm->acpi) {
6092                 if (ibm->acpi->hid) {
6093                         ret = register_tpacpi_subdriver(ibm);
6094                         if (ret)
6095                                 goto err_out;
6096                 }
6097
6098                 if (ibm->acpi->notify) {
6099                         ret = setup_acpi_notify(ibm);
6100                         if (ret == -ENODEV) {
6101                                 printk(TPACPI_NOTICE "disabling subdriver %s\n",
6102                                         ibm->name);
6103                                 ret = 0;
6104                                 goto err_out;
6105                         }
6106                         if (ret < 0)
6107                                 goto err_out;
6108                 }
6109         }
6110
6111         dbg_printk(TPACPI_DBG_INIT,
6112                 "%s installed\n", ibm->name);
6113
6114         if (ibm->read) {
6115                 entry = create_proc_entry(ibm->name,
6116                                           S_IFREG | S_IRUGO | S_IWUSR,
6117                                           proc_dir);
6118                 if (!entry) {
6119                         printk(TPACPI_ERR "unable to create proc entry %s\n",
6120                                ibm->name);
6121                         ret = -ENODEV;
6122                         goto err_out;
6123                 }
6124                 entry->owner = THIS_MODULE;
6125                 entry->data = ibm;
6126                 entry->read_proc = &dispatch_procfs_read;
6127                 if (ibm->write)
6128                         entry->write_proc = &dispatch_procfs_write;
6129                 ibm->flags.proc_created = 1;
6130         }
6131
6132         list_add_tail(&ibm->all_drivers, &tpacpi_all_drivers);
6133
6134         return 0;
6135
6136 err_out:
6137         dbg_printk(TPACPI_DBG_INIT,
6138                 "%s: at error exit path with result %d\n",
6139                 ibm->name, ret);
6140
6141         ibm_exit(ibm);
6142         return (ret < 0)? ret : 0;
6143 }
6144
6145 /* Probing */
6146
6147 static void __init get_thinkpad_model_data(struct thinkpad_id_data *tp)
6148 {
6149         const struct dmi_device *dev = NULL;
6150         char