Merge branch 'release' of git://lm-sensors.org/kernel/mhoffman/hwmon-2.6
[linux-2.6.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) 2006-2007 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 IBM_VERSION "0.16"
25 #define TPACPI_SYSFS_VERSION 0x010000
26
27 /*
28  *  Changelog:
29  *  2007-03-27  0.14    renamed to thinkpad_acpi and moved to
30  *                      drivers/misc.
31  *
32  *  2006-11-22  0.13    new maintainer
33  *                      changelog now lives in git commit history, and will
34  *                      not be updated further in-file.
35  *
36  *  2005-08-17  0.12    fix compilation on 2.6.13-rc kernels
37  *  2005-03-17  0.11    support for 600e, 770x
38  *                          thanks to Jamie Lentin <lentinj@dial.pipex.com>
39  *                      support for 770e, G41
40  *                      G40 and G41 don't have a thinklight
41  *                      temperatures no longer experimental
42  *                      experimental brightness control
43  *                      experimental volume control
44  *                      experimental fan enable/disable
45  *  2005-01-16  0.10    fix module loading on R30, R31
46  *  2005-01-16  0.9     support for 570, R30, R31
47  *                      ultrabay support on A22p, A3x
48  *                      limit arg for cmos, led, beep, drop experimental status
49  *                      more capable led control on A21e, A22p, T20-22, X20
50  *                      experimental temperatures and fan speed
51  *                      experimental embedded controller register dump
52  *                      mark more functions as __init, drop incorrect __exit
53  *                      use MODULE_VERSION
54  *                          thanks to Henrik Brix Andersen <brix@gentoo.org>
55  *                      fix parameter passing on module loading
56  *                          thanks to Rusty Russell <rusty@rustcorp.com.au>
57  *                          thanks to Jim Radford <radford@blackbean.org>
58  *  2004-11-08  0.8     fix init error case, don't return from a macro
59  *                          thanks to Chris Wright <chrisw@osdl.org>
60  *  2004-10-23  0.7     fix module loading on A21e, A22p, T20, T21, X20
61  *                      fix led control on A21e
62  *  2004-10-19  0.6     use acpi_bus_register_driver() to claim HKEY device
63  *  2004-10-18  0.5     thinklight support on A21e, G40, R32, T20, T21, X20
64  *                      proc file format changed
65  *                      video_switch command
66  *                      experimental cmos control
67  *                      experimental led control
68  *                      experimental acpi sounds
69  *  2004-09-16  0.4     support for module parameters
70  *                      hotkey mask can be prefixed by 0x
71  *                      video output switching
72  *                      video expansion control
73  *                      ultrabay eject support
74  *                      removed lcd brightness/on/off control, didn't work
75  *  2004-08-17  0.3     support for R40
76  *                      lcd off, brightness control
77  *                      thinklight on/off
78  *  2004-08-14  0.2     support for T series, X20
79  *                      bluetooth enable/disable
80  *                      hotkey events disabled by default
81  *                      removed fan control, currently useless
82  *  2004-08-09  0.1     initial release, support for X series
83  */
84
85 #include "thinkpad_acpi.h"
86
87 MODULE_AUTHOR("Borislav Deianov, Henrique de Moraes Holschuh");
88 MODULE_DESCRIPTION(IBM_DESC);
89 MODULE_VERSION(IBM_VERSION);
90 MODULE_LICENSE("GPL");
91
92 /* Please remove this in year 2009 */
93 MODULE_ALIAS("ibm_acpi");
94
95 /*
96  * DMI matching for module autoloading
97  *
98  * See http://thinkwiki.org/wiki/List_of_DMI_IDs
99  * See http://thinkwiki.org/wiki/BIOS_Upgrade_Downloads
100  *
101  * Only models listed in thinkwiki will be supported, so add yours
102  * if it is not there yet.
103  */
104 #define IBM_BIOS_MODULE_ALIAS(__type) \
105         MODULE_ALIAS("dmi:bvnIBM:bvr" __type "ET??WW")
106
107 /* Non-ancient thinkpads */
108 MODULE_ALIAS("dmi:bvnIBM:*:svnIBM:*:pvrThinkPad*:rvnIBM:*");
109 MODULE_ALIAS("dmi:bvnLENOVO:*:svnLENOVO:*:pvrThinkPad*:rvnLENOVO:*");
110
111 /* Ancient thinkpad BIOSes have to be identified by
112  * BIOS type or model number, and there are far less
113  * BIOS types than model numbers... */
114 IBM_BIOS_MODULE_ALIAS("I[B,D,H,I,M,N,O,T,W,V,Y,Z]");
115 IBM_BIOS_MODULE_ALIAS("1[0,3,6,8,A-G,I,K,M-P,S,T]");
116 IBM_BIOS_MODULE_ALIAS("K[U,X-Z]");
117
118 #define __unused __attribute__ ((unused))
119
120 /****************************************************************************
121  ****************************************************************************
122  *
123  * ACPI Helpers and device model
124  *
125  ****************************************************************************
126  ****************************************************************************/
127
128 /*************************************************************************
129  * ACPI basic handles
130  */
131
132 static acpi_handle root_handle;
133
134 #define IBM_HANDLE(object, parent, paths...)                    \
135         static acpi_handle  object##_handle;                    \
136         static acpi_handle *object##_parent = &parent##_handle; \
137         static char        *object##_path;                      \
138         static char        *object##_paths[] = { paths }
139
140 IBM_HANDLE(ec, root, "\\_SB.PCI0.ISA.EC0",      /* 240, 240x */
141            "\\_SB.PCI.ISA.EC",  /* 570 */
142            "\\_SB.PCI0.ISA0.EC0",       /* 600e/x, 770e, 770x */
143            "\\_SB.PCI0.ISA.EC", /* A21e, A2xm/p, T20-22, X20-21 */
144            "\\_SB.PCI0.AD4S.EC0",       /* i1400, R30 */
145            "\\_SB.PCI0.ICH3.EC0",       /* R31 */
146            "\\_SB.PCI0.LPC.EC", /* all others */
147            );
148
149 IBM_HANDLE(ecrd, ec, "ECRD");   /* 570 */
150 IBM_HANDLE(ecwr, ec, "ECWR");   /* 570 */
151
152
153 /*************************************************************************
154  * Misc ACPI handles
155  */
156
157 IBM_HANDLE(cmos, root, "\\UCMS",        /* R50, R50e, R50p, R51, T4x, X31, X40 */
158            "\\CMOS",            /* A3x, G4x, R32, T23, T30, X22-24, X30 */
159            "\\CMS",             /* R40, R40e */
160            );                   /* all others */
161
162 IBM_HANDLE(hkey, ec, "\\_SB.HKEY",      /* 600e/x, 770e, 770x */
163            "^HKEY",             /* R30, R31 */
164            "HKEY",              /* all others */
165            );                   /* 570 */
166
167
168 /*************************************************************************
169  * ACPI helpers
170  */
171
172 static int acpi_evalf(acpi_handle handle,
173                       void *res, char *method, char *fmt, ...)
174 {
175         char *fmt0 = fmt;
176         struct acpi_object_list params;
177         union acpi_object in_objs[IBM_MAX_ACPI_ARGS];
178         struct acpi_buffer result, *resultp;
179         union acpi_object out_obj;
180         acpi_status status;
181         va_list ap;
182         char res_type;
183         int success;
184         int quiet;
185
186         if (!*fmt) {
187                 printk(IBM_ERR "acpi_evalf() called with empty format\n");
188                 return 0;
189         }
190
191         if (*fmt == 'q') {
192                 quiet = 1;
193                 fmt++;
194         } else
195                 quiet = 0;
196
197         res_type = *(fmt++);
198
199         params.count = 0;
200         params.pointer = &in_objs[0];
201
202         va_start(ap, fmt);
203         while (*fmt) {
204                 char c = *(fmt++);
205                 switch (c) {
206                 case 'd':       /* int */
207                         in_objs[params.count].integer.value = va_arg(ap, int);
208                         in_objs[params.count++].type = ACPI_TYPE_INTEGER;
209                         break;
210                         /* add more types as needed */
211                 default:
212                         printk(IBM_ERR "acpi_evalf() called "
213                                "with invalid format character '%c'\n", c);
214                         return 0;
215                 }
216         }
217         va_end(ap);
218
219         if (res_type != 'v') {
220                 result.length = sizeof(out_obj);
221                 result.pointer = &out_obj;
222                 resultp = &result;
223         } else
224                 resultp = NULL;
225
226         status = acpi_evaluate_object(handle, method, &params, resultp);
227
228         switch (res_type) {
229         case 'd':               /* int */
230                 if (res)
231                         *(int *)res = out_obj.integer.value;
232                 success = status == AE_OK && out_obj.type == ACPI_TYPE_INTEGER;
233                 break;
234         case 'v':               /* void */
235                 success = status == AE_OK;
236                 break;
237                 /* add more types as needed */
238         default:
239                 printk(IBM_ERR "acpi_evalf() called "
240                        "with invalid format character '%c'\n", res_type);
241                 return 0;
242         }
243
244         if (!success && !quiet)
245                 printk(IBM_ERR "acpi_evalf(%s, %s, ...) failed: %d\n",
246                        method, fmt0, status);
247
248         return success;
249 }
250
251 static void __unused acpi_print_int(acpi_handle handle, char *method)
252 {
253         int i;
254
255         if (acpi_evalf(handle, &i, method, "d"))
256                 printk(IBM_INFO "%s = 0x%x\n", method, i);
257         else
258                 printk(IBM_ERR "error calling %s\n", method);
259 }
260
261 static int acpi_ec_read(int i, u8 * p)
262 {
263         int v;
264
265         if (ecrd_handle) {
266                 if (!acpi_evalf(ecrd_handle, &v, NULL, "dd", i))
267                         return 0;
268                 *p = v;
269         } else {
270                 if (ec_read(i, p) < 0)
271                         return 0;
272         }
273
274         return 1;
275 }
276
277 static int acpi_ec_write(int i, u8 v)
278 {
279         if (ecwr_handle) {
280                 if (!acpi_evalf(ecwr_handle, NULL, NULL, "vdd", i, v))
281                         return 0;
282         } else {
283                 if (ec_write(i, v) < 0)
284                         return 0;
285         }
286
287         return 1;
288 }
289
290 static int _sta(acpi_handle handle)
291 {
292         int status;
293
294         if (!handle || !acpi_evalf(handle, &status, "_STA", "d"))
295                 status = 0;
296
297         return status;
298 }
299
300 static int issue_thinkpad_cmos_command(int cmos_cmd)
301 {
302         if (!cmos_handle)
303                 return -ENXIO;
304
305         if (!acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd))
306                 return -EIO;
307
308         return 0;
309 }
310
311 /*************************************************************************
312  * ACPI device model
313  */
314
315 static void drv_acpi_handle_init(char *name,
316                            acpi_handle *handle, acpi_handle parent,
317                            char **paths, int num_paths, char **path)
318 {
319         int i;
320         acpi_status status;
321
322         vdbg_printk(TPACPI_DBG_INIT, "trying to locate ACPI handle for %s\n",
323                 name);
324
325         for (i = 0; i < num_paths; i++) {
326                 status = acpi_get_handle(parent, paths[i], handle);
327                 if (ACPI_SUCCESS(status)) {
328                         *path = paths[i];
329                         dbg_printk(TPACPI_DBG_INIT,
330                                    "Found ACPI handle %s for %s\n",
331                                    *path, name);
332                         return;
333                 }
334         }
335
336         vdbg_printk(TPACPI_DBG_INIT, "ACPI handle for %s not found\n",
337                     name);
338         *handle = NULL;
339 }
340
341 static void dispatch_acpi_notify(acpi_handle handle, u32 event, void *data)
342 {
343         struct ibm_struct *ibm = data;
344
345         if (!ibm || !ibm->acpi || !ibm->acpi->notify)
346                 return;
347
348         ibm->acpi->notify(ibm, event);
349 }
350
351 static int __init setup_acpi_notify(struct ibm_struct *ibm)
352 {
353         acpi_status status;
354         int rc;
355
356         BUG_ON(!ibm->acpi);
357
358         if (!*ibm->acpi->handle)
359                 return 0;
360
361         vdbg_printk(TPACPI_DBG_INIT,
362                 "setting up ACPI notify for %s\n", ibm->name);
363
364         rc = acpi_bus_get_device(*ibm->acpi->handle, &ibm->acpi->device);
365         if (rc < 0) {
366                 printk(IBM_ERR "acpi_bus_get_device(%s) failed: %d\n",
367                         ibm->name, rc);
368                 return -ENODEV;
369         }
370
371         acpi_driver_data(ibm->acpi->device) = ibm;
372         sprintf(acpi_device_class(ibm->acpi->device), "%s/%s",
373                 IBM_ACPI_EVENT_PREFIX,
374                 ibm->name);
375
376         status = acpi_install_notify_handler(*ibm->acpi->handle,
377                         ibm->acpi->type, dispatch_acpi_notify, ibm);
378         if (ACPI_FAILURE(status)) {
379                 if (status == AE_ALREADY_EXISTS) {
380                         printk(IBM_NOTICE "another device driver is already handling %s events\n",
381                                 ibm->name);
382                 } else {
383                         printk(IBM_ERR "acpi_install_notify_handler(%s) failed: %d\n",
384                                 ibm->name, status);
385                 }
386                 return -ENODEV;
387         }
388         ibm->flags.acpi_notify_installed = 1;
389         return 0;
390 }
391
392 static int __init tpacpi_device_add(struct acpi_device *device)
393 {
394         return 0;
395 }
396
397 static int __init register_tpacpi_subdriver(struct ibm_struct *ibm)
398 {
399         int rc;
400
401         dbg_printk(TPACPI_DBG_INIT,
402                 "registering %s as an ACPI driver\n", ibm->name);
403
404         BUG_ON(!ibm->acpi);
405
406         ibm->acpi->driver = kzalloc(sizeof(struct acpi_driver), GFP_KERNEL);
407         if (!ibm->acpi->driver) {
408                 printk(IBM_ERR "kzalloc(ibm->driver) failed\n");
409                 return -ENOMEM;
410         }
411
412         sprintf(ibm->acpi->driver->name, "%s_%s", IBM_NAME, ibm->name);
413         ibm->acpi->driver->ids = ibm->acpi->hid;
414
415         ibm->acpi->driver->ops.add = &tpacpi_device_add;
416
417         rc = acpi_bus_register_driver(ibm->acpi->driver);
418         if (rc < 0) {
419                 printk(IBM_ERR "acpi_bus_register_driver(%s) failed: %d\n",
420                        ibm->name, rc);
421                 kfree(ibm->acpi->driver);
422                 ibm->acpi->driver = NULL;
423         } else if (!rc)
424                 ibm->flags.acpi_driver_registered = 1;
425
426         return rc;
427 }
428
429
430 /****************************************************************************
431  ****************************************************************************
432  *
433  * Procfs Helpers
434  *
435  ****************************************************************************
436  ****************************************************************************/
437
438 static int dispatch_procfs_read(char *page, char **start, off_t off,
439                         int count, int *eof, void *data)
440 {
441         struct ibm_struct *ibm = data;
442         int len;
443
444         if (!ibm || !ibm->read)
445                 return -EINVAL;
446
447         len = ibm->read(page);
448         if (len < 0)
449                 return len;
450
451         if (len <= off + count)
452                 *eof = 1;
453         *start = page + off;
454         len -= off;
455         if (len > count)
456                 len = count;
457         if (len < 0)
458                 len = 0;
459
460         return len;
461 }
462
463 static int dispatch_procfs_write(struct file *file,
464                         const char __user * userbuf,
465                         unsigned long count, void *data)
466 {
467         struct ibm_struct *ibm = data;
468         char *kernbuf;
469         int ret;
470
471         if (!ibm || !ibm->write)
472                 return -EINVAL;
473
474         kernbuf = kmalloc(count + 2, GFP_KERNEL);
475         if (!kernbuf)
476                 return -ENOMEM;
477
478         if (copy_from_user(kernbuf, userbuf, count)) {
479                 kfree(kernbuf);
480                 return -EFAULT;
481         }
482
483         kernbuf[count] = 0;
484         strcat(kernbuf, ",");
485         ret = ibm->write(kernbuf);
486         if (ret == 0)
487                 ret = count;
488
489         kfree(kernbuf);
490
491         return ret;
492 }
493
494 static char *next_cmd(char **cmds)
495 {
496         char *start = *cmds;
497         char *end;
498
499         while ((end = strchr(start, ',')) && end == start)
500                 start = end + 1;
501
502         if (!end)
503                 return NULL;
504
505         *end = 0;
506         *cmds = end + 1;
507         return start;
508 }
509
510
511 /****************************************************************************
512  ****************************************************************************
513  *
514  * Device model: input, hwmon and platform
515  *
516  ****************************************************************************
517  ****************************************************************************/
518
519 static struct platform_device *tpacpi_pdev;
520 static struct device *tpacpi_hwmon;
521 static struct input_dev *tpacpi_inputdev;
522
523
524 static int tpacpi_resume_handler(struct platform_device *pdev)
525 {
526         struct ibm_struct *ibm, *itmp;
527
528         list_for_each_entry_safe(ibm, itmp,
529                                  &tpacpi_all_drivers,
530                                  all_drivers) {
531                 if (ibm->resume)
532                         (ibm->resume)();
533         }
534
535         return 0;
536 }
537
538 static struct platform_driver tpacpi_pdriver = {
539         .driver = {
540                 .name = IBM_DRVR_NAME,
541                 .owner = THIS_MODULE,
542         },
543         .resume = tpacpi_resume_handler,
544 };
545
546
547 /*************************************************************************
548  * thinkpad-acpi driver attributes
549  */
550
551 /* interface_version --------------------------------------------------- */
552 static ssize_t tpacpi_driver_interface_version_show(
553                                 struct device_driver *drv,
554                                 char *buf)
555 {
556         return snprintf(buf, PAGE_SIZE, "0x%08x\n", TPACPI_SYSFS_VERSION);
557 }
558
559 static DRIVER_ATTR(interface_version, S_IRUGO,
560                 tpacpi_driver_interface_version_show, NULL);
561
562 /* debug_level --------------------------------------------------------- */
563 static ssize_t tpacpi_driver_debug_show(struct device_driver *drv,
564                                                 char *buf)
565 {
566         return snprintf(buf, PAGE_SIZE, "0x%04x\n", dbg_level);
567 }
568
569 static ssize_t tpacpi_driver_debug_store(struct device_driver *drv,
570                                                 const char *buf, size_t count)
571 {
572         unsigned long t;
573
574         if (parse_strtoul(buf, 0xffff, &t))
575                 return -EINVAL;
576
577         dbg_level = t;
578
579         return count;
580 }
581
582 static DRIVER_ATTR(debug_level, S_IWUSR | S_IRUGO,
583                 tpacpi_driver_debug_show, tpacpi_driver_debug_store);
584
585 /* version ------------------------------------------------------------- */
586 static ssize_t tpacpi_driver_version_show(struct device_driver *drv,
587                                                 char *buf)
588 {
589         return snprintf(buf, PAGE_SIZE, "%s v%s\n", IBM_DESC, IBM_VERSION);
590 }
591
592 static DRIVER_ATTR(version, S_IRUGO,
593                 tpacpi_driver_version_show, NULL);
594
595 /* --------------------------------------------------------------------- */
596
597 static struct driver_attribute* tpacpi_driver_attributes[] = {
598         &driver_attr_debug_level, &driver_attr_version,
599         &driver_attr_interface_version,
600 };
601
602 static int __init tpacpi_create_driver_attributes(struct device_driver *drv)
603 {
604         int i, res;
605
606         i = 0;
607         res = 0;
608         while (!res && i < ARRAY_SIZE(tpacpi_driver_attributes)) {
609                 res = driver_create_file(drv, tpacpi_driver_attributes[i]);
610                 i++;
611         }
612
613         return res;
614 }
615
616 static void tpacpi_remove_driver_attributes(struct device_driver *drv)
617 {
618         int i;
619
620         for(i = 0; i < ARRAY_SIZE(tpacpi_driver_attributes); i++)
621                 driver_remove_file(drv, tpacpi_driver_attributes[i]);
622 }
623
624 /*************************************************************************
625  * sysfs support helpers
626  */
627
628 struct attribute_set_obj {
629         struct attribute_set s;
630         struct attribute *a;
631 } __attribute__((packed));
632
633 static struct attribute_set *create_attr_set(unsigned int max_members,
634                                                 const char* name)
635 {
636         struct attribute_set_obj *sobj;
637
638         if (max_members == 0)
639                 return NULL;
640
641         /* Allocates space for implicit NULL at the end too */
642         sobj = kzalloc(sizeof(struct attribute_set_obj) +
643                     max_members * sizeof(struct attribute *),
644                     GFP_KERNEL);
645         if (!sobj)
646                 return NULL;
647         sobj->s.max_members = max_members;
648         sobj->s.group.attrs = &sobj->a;
649         sobj->s.group.name = name;
650
651         return &sobj->s;
652 }
653
654 /* not multi-threaded safe, use it in a single thread per set */
655 static int add_to_attr_set(struct attribute_set* s, struct attribute *attr)
656 {
657         if (!s || !attr)
658                 return -EINVAL;
659
660         if (s->members >= s->max_members)
661                 return -ENOMEM;
662
663         s->group.attrs[s->members] = attr;
664         s->members++;
665
666         return 0;
667 }
668
669 static int add_many_to_attr_set(struct attribute_set* s,
670                         struct attribute **attr,
671                         unsigned int count)
672 {
673         int i, res;
674
675         for (i = 0; i < count; i++) {
676                 res = add_to_attr_set(s, attr[i]);
677                 if (res)
678                         return res;
679         }
680
681         return 0;
682 }
683
684 static void delete_attr_set(struct attribute_set* s, struct kobject *kobj)
685 {
686         sysfs_remove_group(kobj, &s->group);
687         destroy_attr_set(s);
688 }
689
690 static int parse_strtoul(const char *buf,
691                 unsigned long max, unsigned long *value)
692 {
693         char *endp;
694
695         *value = simple_strtoul(buf, &endp, 0);
696         while (*endp && isspace(*endp))
697                 endp++;
698         if (*endp || *value > max)
699                 return -EINVAL;
700
701         return 0;
702 }
703
704 /****************************************************************************
705  ****************************************************************************
706  *
707  * Subdrivers
708  *
709  ****************************************************************************
710  ****************************************************************************/
711
712 /*************************************************************************
713  * thinkpad-acpi init subdriver
714  */
715
716 static int __init thinkpad_acpi_driver_init(struct ibm_init_struct *iibm)
717 {
718         printk(IBM_INFO "%s v%s\n", IBM_DESC, IBM_VERSION);
719         printk(IBM_INFO "%s\n", IBM_URL);
720
721         printk(IBM_INFO "ThinkPad BIOS %s, EC %s\n",
722                 (thinkpad_id.bios_version_str) ?
723                         thinkpad_id.bios_version_str : "unknown",
724                 (thinkpad_id.ec_version_str) ?
725                         thinkpad_id.ec_version_str : "unknown");
726
727         if (thinkpad_id.vendor && thinkpad_id.model_str)
728                 printk(IBM_INFO "%s %s\n",
729                         (thinkpad_id.vendor == PCI_VENDOR_ID_IBM) ?
730                                 "IBM" : ((thinkpad_id.vendor ==
731                                                 PCI_VENDOR_ID_LENOVO) ?
732                                         "Lenovo" : "Unknown vendor"),
733                         thinkpad_id.model_str);
734
735         return 0;
736 }
737
738 static int thinkpad_acpi_driver_read(char *p)
739 {
740         int len = 0;
741
742         len += sprintf(p + len, "driver:\t\t%s\n", IBM_DESC);
743         len += sprintf(p + len, "version:\t%s\n", IBM_VERSION);
744
745         return len;
746 }
747
748 static struct ibm_struct thinkpad_acpi_driver_data = {
749         .name = "driver",
750         .read = thinkpad_acpi_driver_read,
751 };
752
753 /*************************************************************************
754  * Hotkey subdriver
755  */
756
757 static int hotkey_orig_status;
758 static u32 hotkey_orig_mask;
759 static u32 hotkey_all_mask;
760 static u32 hotkey_reserved_mask;
761
762 static u16 *hotkey_keycode_map;
763
764 static struct attribute_set *hotkey_dev_attributes;
765
766 static int hotkey_get_wlsw(int *status)
767 {
768         if (!acpi_evalf(hkey_handle, status, "WLSW", "d"))
769                 return -EIO;
770         return 0;
771 }
772
773 /* sysfs hotkey enable ------------------------------------------------- */
774 static ssize_t hotkey_enable_show(struct device *dev,
775                            struct device_attribute *attr,
776                            char *buf)
777 {
778         int res, status;
779         u32 mask;
780
781         res = hotkey_get(&status, &mask);
782         if (res)
783                 return res;
784
785         return snprintf(buf, PAGE_SIZE, "%d\n", status);
786 }
787
788 static ssize_t hotkey_enable_store(struct device *dev,
789                             struct device_attribute *attr,
790                             const char *buf, size_t count)
791 {
792         unsigned long t;
793         int res, status;
794         u32 mask;
795
796         if (parse_strtoul(buf, 1, &t))
797                 return -EINVAL;
798
799         res = hotkey_get(&status, &mask);
800         if (!res)
801                 res = hotkey_set(t, mask);
802
803         return (res) ? res : count;
804 }
805
806 static struct device_attribute dev_attr_hotkey_enable =
807         __ATTR(hotkey_enable, S_IWUSR | S_IRUGO,
808                 hotkey_enable_show, hotkey_enable_store);
809
810 /* sysfs hotkey mask --------------------------------------------------- */
811 static ssize_t hotkey_mask_show(struct device *dev,
812                            struct device_attribute *attr,
813                            char *buf)
814 {
815         int res, status;
816         u32 mask;
817
818         res = hotkey_get(&status, &mask);
819         if (res)
820                 return res;
821
822         return snprintf(buf, PAGE_SIZE, "0x%08x\n", mask);
823 }
824
825 static ssize_t hotkey_mask_store(struct device *dev,
826                             struct device_attribute *attr,
827                             const char *buf, size_t count)
828 {
829         unsigned long t;
830         int res, status;
831         u32 mask;
832
833         if (parse_strtoul(buf, 0xffffffffUL, &t))
834                 return -EINVAL;
835
836         res = hotkey_get(&status, &mask);
837         if (!res)
838                 hotkey_set(status, t);
839
840         return (res) ? res : count;
841 }
842
843 static struct device_attribute dev_attr_hotkey_mask =
844         __ATTR(hotkey_mask, S_IWUSR | S_IRUGO,
845                 hotkey_mask_show, hotkey_mask_store);
846
847 /* sysfs hotkey bios_enabled ------------------------------------------- */
848 static ssize_t hotkey_bios_enabled_show(struct device *dev,
849                            struct device_attribute *attr,
850                            char *buf)
851 {
852         return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_orig_status);
853 }
854
855 static struct device_attribute dev_attr_hotkey_bios_enabled =
856         __ATTR(hotkey_bios_enabled, S_IRUGO, hotkey_bios_enabled_show, NULL);
857
858 /* sysfs hotkey bios_mask ---------------------------------------------- */
859 static ssize_t hotkey_bios_mask_show(struct device *dev,
860                            struct device_attribute *attr,
861                            char *buf)
862 {
863         return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_orig_mask);
864 }
865
866 static struct device_attribute dev_attr_hotkey_bios_mask =
867         __ATTR(hotkey_bios_mask, S_IRUGO, hotkey_bios_mask_show, NULL);
868
869 /* sysfs hotkey all_mask ----------------------------------------------- */
870 static ssize_t hotkey_all_mask_show(struct device *dev,
871                            struct device_attribute *attr,
872                            char *buf)
873 {
874         return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_all_mask);
875 }
876
877 static struct device_attribute dev_attr_hotkey_all_mask =
878         __ATTR(hotkey_all_mask, S_IRUGO, hotkey_all_mask_show, NULL);
879
880 /* sysfs hotkey recommended_mask --------------------------------------- */
881 static ssize_t hotkey_recommended_mask_show(struct device *dev,
882                                             struct device_attribute *attr,
883                                             char *buf)
884 {
885         return snprintf(buf, PAGE_SIZE, "0x%08x\n",
886                         hotkey_all_mask & ~hotkey_reserved_mask);
887 }
888
889 static struct device_attribute dev_attr_hotkey_recommended_mask =
890         __ATTR(hotkey_recommended_mask, S_IRUGO,
891                 hotkey_recommended_mask_show, NULL);
892
893 /* sysfs hotkey radio_sw ----------------------------------------------- */
894 static ssize_t hotkey_radio_sw_show(struct device *dev,
895                            struct device_attribute *attr,
896                            char *buf)
897 {
898         int res, s;
899         res = hotkey_get_wlsw(&s);
900         if (res < 0)
901                 return res;
902
903         return snprintf(buf, PAGE_SIZE, "%d\n", !!s);
904 }
905
906 static struct device_attribute dev_attr_hotkey_radio_sw =
907         __ATTR(hotkey_radio_sw, S_IRUGO, hotkey_radio_sw_show, NULL);
908
909 /* sysfs hotkey report_mode -------------------------------------------- */
910 static ssize_t hotkey_report_mode_show(struct device *dev,
911                            struct device_attribute *attr,
912                            char *buf)
913 {
914         return snprintf(buf, PAGE_SIZE, "%d\n",
915                 (hotkey_report_mode != 0) ? hotkey_report_mode : 1);
916 }
917
918 static struct device_attribute dev_attr_hotkey_report_mode =
919         __ATTR(hotkey_report_mode, S_IRUGO, hotkey_report_mode_show, NULL);
920
921 /* --------------------------------------------------------------------- */
922
923 static struct attribute *hotkey_attributes[] __initdata = {
924         &dev_attr_hotkey_enable.attr,
925         &dev_attr_hotkey_report_mode.attr,
926 };
927
928 static struct attribute *hotkey_mask_attributes[] __initdata = {
929         &dev_attr_hotkey_mask.attr,
930         &dev_attr_hotkey_bios_enabled.attr,
931         &dev_attr_hotkey_bios_mask.attr,
932         &dev_attr_hotkey_all_mask.attr,
933         &dev_attr_hotkey_recommended_mask.attr,
934 };
935
936 static int __init hotkey_init(struct ibm_init_struct *iibm)
937 {
938
939         static u16 ibm_keycode_map[] __initdata = {
940                 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
941                 KEY_FN_F1,      KEY_FN_F2,      KEY_COFFEE,     KEY_SLEEP,
942                 KEY_WLAN,       KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
943                 KEY_FN_F9,      KEY_FN_F10,     KEY_FN_F11,     KEY_SUSPEND,
944                 /* Scan codes 0x0C to 0x0F: Other ACPI HKEY hot keys */
945                 KEY_UNKNOWN,    /* 0x0C: FN+BACKSPACE */
946                 KEY_UNKNOWN,    /* 0x0D: FN+INSERT */
947                 KEY_UNKNOWN,    /* 0x0E: FN+DELETE */
948                 KEY_RESERVED,   /* 0x0F: FN+HOME (brightness up) */
949                 /* Scan codes 0x10 to 0x1F: Extended ACPI HKEY hot keys */
950                 KEY_RESERVED,   /* 0x10: FN+END (brightness down) */
951                 KEY_RESERVED,   /* 0x11: FN+PGUP (thinklight toggle) */
952                 KEY_UNKNOWN,    /* 0x12: FN+PGDOWN */
953                 KEY_ZOOM,       /* 0x13: FN+SPACE (zoom) */
954                 KEY_RESERVED,   /* 0x14: VOLUME UP */
955                 KEY_RESERVED,   /* 0x15: VOLUME DOWN */
956                 KEY_RESERVED,   /* 0x16: MUTE */
957                 KEY_VENDOR,     /* 0x17: Thinkpad/AccessIBM/Lenovo */
958                 /* (assignments unknown, please report if found) */
959                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
960                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
961         };
962         static u16 lenovo_keycode_map[] __initdata = {
963                 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
964                 KEY_FN_F1,      KEY_COFFEE,     KEY_BATTERY,    KEY_SLEEP,
965                 KEY_WLAN,       KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
966                 KEY_FN_F9,      KEY_FN_F10,     KEY_FN_F11,     KEY_SUSPEND,
967                 /* Scan codes 0x0C to 0x0F: Other ACPI HKEY hot keys */
968                 KEY_UNKNOWN,    /* 0x0C: FN+BACKSPACE */
969                 KEY_UNKNOWN,    /* 0x0D: FN+INSERT */
970                 KEY_UNKNOWN,    /* 0x0E: FN+DELETE */
971                 KEY_BRIGHTNESSUP,       /* 0x0F: FN+HOME (brightness up) */
972                 /* Scan codes 0x10 to 0x1F: Extended ACPI HKEY hot keys */
973                 KEY_BRIGHTNESSDOWN,     /* 0x10: FN+END (brightness down) */
974                 KEY_RESERVED,   /* 0x11: FN+PGUP (thinklight toggle) */
975                 KEY_UNKNOWN,    /* 0x12: FN+PGDOWN */
976                 KEY_ZOOM,       /* 0x13: FN+SPACE (zoom) */
977                 KEY_RESERVED,   /* 0x14: VOLUME UP */
978                 KEY_RESERVED,   /* 0x15: VOLUME DOWN */
979                 KEY_RESERVED,   /* 0x16: MUTE */
980                 KEY_VENDOR,     /* 0x17: Thinkpad/AccessIBM/Lenovo */
981                 /* (assignments unknown, please report if found) */
982                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
983                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
984         };
985
986 #define TPACPI_HOTKEY_MAP_LEN           ARRAY_SIZE(ibm_keycode_map)
987 #define TPACPI_HOTKEY_MAP_SIZE          sizeof(ibm_keycode_map)
988 #define TPACPI_HOTKEY_MAP_TYPESIZE      sizeof(ibm_keycode_map[0])
989
990         int res, i;
991         int status;
992
993         vdbg_printk(TPACPI_DBG_INIT, "initializing hotkey subdriver\n");
994
995         BUG_ON(!tpacpi_inputdev);
996
997         IBM_ACPIHANDLE_INIT(hkey);
998         mutex_init(&hotkey_mutex);
999
1000         /* hotkey not supported on 570 */
1001         tp_features.hotkey = hkey_handle != NULL;
1002
1003         vdbg_printk(TPACPI_DBG_INIT, "hotkeys are %s\n",
1004                 str_supported(tp_features.hotkey));
1005
1006         if (tp_features.hotkey) {
1007                 hotkey_dev_attributes = create_attr_set(8, NULL);
1008                 if (!hotkey_dev_attributes)
1009                         return -ENOMEM;
1010                 res = add_many_to_attr_set(hotkey_dev_attributes,
1011                                 hotkey_attributes,
1012                                 ARRAY_SIZE(hotkey_attributes));
1013                 if (res)
1014                         return res;
1015
1016                 /* mask not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
1017                    A30, R30, R31, T20-22, X20-21, X22-24 */
1018                 tp_features.hotkey_mask =
1019                         acpi_evalf(hkey_handle, NULL, "DHKN", "qv");
1020
1021                 vdbg_printk(TPACPI_DBG_INIT, "hotkey masks are %s\n",
1022                         str_supported(tp_features.hotkey_mask));
1023
1024                 if (tp_features.hotkey_mask) {
1025                         /* MHKA available in A31, R40, R40e, T4x, X31, and later */
1026                         if (!acpi_evalf(hkey_handle, &hotkey_all_mask,
1027                                         "MHKA", "qd"))
1028                                 hotkey_all_mask = 0x080cU; /* FN+F12, FN+F4, FN+F3 */
1029                 }
1030
1031                 res = hotkey_get(&hotkey_orig_status, &hotkey_orig_mask);
1032                 if (!res && tp_features.hotkey_mask) {
1033                         res = add_many_to_attr_set(hotkey_dev_attributes,
1034                                 hotkey_mask_attributes,
1035                                 ARRAY_SIZE(hotkey_mask_attributes));
1036                 }
1037
1038                 /* Not all thinkpads have a hardware radio switch */
1039                 if (!res && acpi_evalf(hkey_handle, &status, "WLSW", "qd")) {
1040                         tp_features.hotkey_wlsw = 1;
1041                         printk(IBM_INFO
1042                                 "radio switch found; radios are %s\n",
1043                                 enabled(status, 0));
1044                         res = add_to_attr_set(hotkey_dev_attributes,
1045                                         &dev_attr_hotkey_radio_sw.attr);
1046                 }
1047
1048                 if (!res)
1049                         res = register_attr_set_with_sysfs(
1050                                         hotkey_dev_attributes,
1051                                         &tpacpi_pdev->dev.kobj);
1052                 if (res)
1053                         return res;
1054
1055                 /* Set up key map */
1056
1057                 hotkey_keycode_map = kmalloc(TPACPI_HOTKEY_MAP_SIZE,
1058                                                 GFP_KERNEL);
1059                 if (!hotkey_keycode_map) {
1060                         printk(IBM_ERR "failed to allocate memory for key map\n");
1061                         return -ENOMEM;
1062                 }
1063
1064                 if (thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO) {
1065                         dbg_printk(TPACPI_DBG_INIT,
1066                                    "using Lenovo default hot key map\n");
1067                         memcpy(hotkey_keycode_map, &lenovo_keycode_map,
1068                                 TPACPI_HOTKEY_MAP_SIZE);
1069                 } else {
1070                         dbg_printk(TPACPI_DBG_INIT,
1071                                    "using IBM default hot key map\n");
1072                         memcpy(hotkey_keycode_map, &ibm_keycode_map,
1073                                 TPACPI_HOTKEY_MAP_SIZE);
1074                 }
1075
1076                 set_bit(EV_KEY, tpacpi_inputdev->evbit);
1077                 set_bit(EV_MSC, tpacpi_inputdev->evbit);
1078                 set_bit(MSC_SCAN, tpacpi_inputdev->mscbit);
1079                 tpacpi_inputdev->keycodesize = TPACPI_HOTKEY_MAP_TYPESIZE;
1080                 tpacpi_inputdev->keycodemax = TPACPI_HOTKEY_MAP_LEN;
1081                 tpacpi_inputdev->keycode = hotkey_keycode_map;
1082                 for (i = 0; i < TPACPI_HOTKEY_MAP_LEN; i++) {
1083                         if (hotkey_keycode_map[i] != KEY_RESERVED) {
1084                                 set_bit(hotkey_keycode_map[i],
1085                                         tpacpi_inputdev->keybit);
1086                         } else {
1087                                 if (i < sizeof(hotkey_reserved_mask)*8)
1088                                         hotkey_reserved_mask |= 1 << i;
1089                         }
1090                 }
1091
1092                 if (tp_features.hotkey_wlsw) {
1093                         set_bit(EV_SW, tpacpi_inputdev->evbit);
1094                         set_bit(SW_RADIO, tpacpi_inputdev->swbit);
1095                 }
1096
1097                 dbg_printk(TPACPI_DBG_INIT,
1098                                 "enabling hot key handling\n");
1099                 res = hotkey_set(1, (hotkey_all_mask & ~hotkey_reserved_mask)
1100                                         | hotkey_orig_mask);
1101                 if (res)
1102                         return res;
1103
1104                 dbg_printk(TPACPI_DBG_INIT,
1105                                 "legacy hot key reporting over procfs %s\n",
1106                                 (hotkey_report_mode < 2) ?
1107                                         "enabled" : "disabled");
1108         }
1109
1110         return (tp_features.hotkey)? 0 : 1;
1111 }
1112
1113 static void hotkey_exit(void)
1114 {
1115         int res;
1116
1117         if (tp_features.hotkey) {
1118                 dbg_printk(TPACPI_DBG_EXIT, "restoring original hotkey mask\n");
1119                 res = hotkey_set(hotkey_orig_status, hotkey_orig_mask);
1120                 if (res)
1121                         printk(IBM_ERR "failed to restore hotkey to BIOS defaults\n");
1122         }
1123
1124         if (hotkey_dev_attributes) {
1125                 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
1126                 hotkey_dev_attributes = NULL;
1127         }
1128 }
1129
1130 static void tpacpi_input_send_key(unsigned int scancode,
1131                                   unsigned int keycode)
1132 {
1133         if (keycode != KEY_RESERVED) {
1134                 input_report_key(tpacpi_inputdev, keycode, 1);
1135                 if (keycode == KEY_UNKNOWN)
1136                         input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN,
1137                                     scancode);
1138                 input_sync(tpacpi_inputdev);
1139
1140                 input_report_key(tpacpi_inputdev, keycode, 0);
1141                 if (keycode == KEY_UNKNOWN)
1142                         input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN,
1143                                     scancode);
1144                 input_sync(tpacpi_inputdev);
1145         }
1146 }
1147
1148 static void tpacpi_input_send_radiosw(void)
1149 {
1150         int wlsw;
1151
1152         if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&wlsw))
1153                 input_report_switch(tpacpi_inputdev,
1154                                     SW_RADIO, !!wlsw);
1155 }
1156
1157 static void hotkey_notify(struct ibm_struct *ibm, u32 event)
1158 {
1159         u32 hkey;
1160         unsigned int keycode, scancode;
1161         int send_acpi_ev = 0;
1162
1163         if (event == 0x80 && acpi_evalf(hkey_handle, &hkey, "MHKP", "d")) {
1164                 switch (hkey >> 12) {
1165                 case 1:
1166                         /* 0x1000-0x1FFF: key presses */
1167                         scancode = hkey & 0xfff;
1168                         if (scancode > 0 && scancode < 0x21) {
1169                                 scancode--;
1170                                 keycode = hotkey_keycode_map[scancode];
1171                                 tpacpi_input_send_key(scancode, keycode);
1172                         } else {
1173                                 printk(IBM_ERR
1174                                        "hotkey 0x%04x out of range for keyboard map\n",
1175                                        hkey);
1176                                 send_acpi_ev = 1;
1177                         }
1178                         break;
1179                 case 5:
1180                         /* 0x5000-0x5FFF: LID */
1181                         /* we don't handle it through this path, just
1182                          * eat up known LID events */
1183                         if (hkey != 0x5001 && hkey != 0x5002) {
1184                                 printk(IBM_ERR
1185                                         "unknown LID-related hotkey event: 0x%04x\n",
1186                                         hkey);
1187                                 send_acpi_ev = 1;
1188                         }
1189                         break;
1190                 case 7:
1191                         /* 0x7000-0x7FFF: misc */
1192                         if (tp_features.hotkey_wlsw && hkey == 0x7000) {
1193                                 tpacpi_input_send_radiosw();
1194                                 break;
1195                         }
1196                         /* fallthrough to default */
1197                 default:
1198                         /* case 2: dock-related */
1199                         /*      0x2305 - T43 waking up due to bay lever eject while aslept */
1200                         /* case 3: ultra-bay related. maybe bay in dock? */
1201                         /*      0x3003 - T43 after wake up by bay lever eject (0x2305) */
1202                         printk(IBM_NOTICE "unhandled HKEY event 0x%04x\n", hkey);
1203                         send_acpi_ev = 1;
1204                 }
1205         } else {
1206                 printk(IBM_ERR "unknown hotkey notification event %d\n", event);
1207                 hkey = 0;
1208                 send_acpi_ev = 1;
1209         }
1210
1211         /* Legacy events */
1212         if (send_acpi_ev || hotkey_report_mode < 2)
1213                 acpi_bus_generate_proc_event(ibm->acpi->device, event, hkey);
1214
1215         /* netlink events */
1216         if (send_acpi_ev) {
1217                 acpi_bus_generate_netlink_event(ibm->acpi->device->pnp.device_class,
1218                                                 ibm->acpi->device->dev.bus_id,
1219                                                 event, hkey);
1220         }
1221 }
1222
1223 static void hotkey_resume(void)
1224 {
1225         tpacpi_input_send_radiosw();
1226 }
1227
1228 /*
1229  * Call with hotkey_mutex held
1230  */
1231 static int hotkey_get(int *status, u32 *mask)
1232 {
1233         if (!acpi_evalf(hkey_handle, status, "DHKC", "d"))
1234                 return -EIO;
1235
1236         if (tp_features.hotkey_mask)
1237                 if (!acpi_evalf(hkey_handle, mask, "DHKN", "d"))
1238                         return -EIO;
1239
1240         return 0;
1241 }
1242
1243 /*
1244  * Call with hotkey_mutex held
1245  */
1246 static int hotkey_set(int status, u32 mask)
1247 {
1248         int i;
1249
1250         if (!acpi_evalf(hkey_handle, NULL, "MHKC", "vd", status))
1251                 return -EIO;
1252
1253         if (tp_features.hotkey_mask)
1254                 for (i = 0; i < 32; i++) {
1255                         int bit = ((1 << i) & mask) != 0;
1256                         if (!acpi_evalf(hkey_handle,
1257                                         NULL, "MHKM", "vdd", i + 1, bit))
1258                                 return -EIO;
1259                 }
1260
1261         return 0;
1262 }
1263
1264 /* procfs -------------------------------------------------------------- */
1265 static int hotkey_read(char *p)
1266 {
1267         int res, status;
1268         u32 mask;
1269         int len = 0;
1270
1271         if (!tp_features.hotkey) {
1272                 len += sprintf(p + len, "status:\t\tnot supported\n");
1273                 return len;
1274         }
1275
1276         res = mutex_lock_interruptible(&hotkey_mutex);
1277         if (res < 0)
1278                 return res;
1279         res = hotkey_get(&status, &mask);
1280         mutex_unlock(&hotkey_mutex);
1281         if (res)
1282                 return res;
1283
1284         len += sprintf(p + len, "status:\t\t%s\n", enabled(status, 0));
1285         if (tp_features.hotkey_mask) {
1286                 len += sprintf(p + len, "mask:\t\t0x%08x\n", mask);
1287                 len += sprintf(p + len,
1288                                "commands:\tenable, disable, reset, <mask>\n");
1289         } else {
1290                 len += sprintf(p + len, "mask:\t\tnot supported\n");
1291                 len += sprintf(p + len, "commands:\tenable, disable, reset\n");
1292         }
1293
1294         return len;
1295 }
1296
1297 static int hotkey_write(char *buf)
1298 {
1299         int res, status;
1300         u32 mask;
1301         char *cmd;
1302         int do_cmd = 0;
1303
1304         if (!tp_features.hotkey)
1305                 return -ENODEV;
1306
1307         res = mutex_lock_interruptible(&hotkey_mutex);
1308         if (res < 0)
1309                 return res;
1310
1311         res = hotkey_get(&status, &mask);
1312         if (res)
1313                 goto errexit;
1314
1315         res = 0;
1316         while ((cmd = next_cmd(&buf))) {
1317                 if (strlencmp(cmd, "enable") == 0) {
1318                         status = 1;
1319                 } else if (strlencmp(cmd, "disable") == 0) {
1320                         status = 0;
1321                 } else if (strlencmp(cmd, "reset") == 0) {
1322                         status = hotkey_orig_status;
1323                         mask = hotkey_orig_mask;
1324                 } else if (sscanf(cmd, "0x%x", &mask) == 1) {
1325                         /* mask set */
1326                 } else if (sscanf(cmd, "%x", &mask) == 1) {
1327                         /* mask set */
1328                 } else {
1329                         res = -EINVAL;
1330                         goto errexit;
1331                 }
1332                 do_cmd = 1;
1333         }
1334
1335         if (do_cmd)
1336                 res = hotkey_set(status, mask);
1337
1338 errexit:
1339         mutex_unlock(&hotkey_mutex);
1340         return res;
1341 }
1342
1343 static const struct acpi_device_id ibm_htk_device_ids[] = {
1344         {IBM_HKEY_HID, 0},
1345         {"", 0},
1346 };
1347
1348 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver = {
1349         .hid = ibm_htk_device_ids,
1350         .notify = hotkey_notify,
1351         .handle = &hkey_handle,
1352         .type = ACPI_DEVICE_NOTIFY,
1353 };
1354
1355 static struct ibm_struct hotkey_driver_data = {
1356         .name = "hotkey",
1357         .read = hotkey_read,
1358         .write = hotkey_write,
1359         .exit = hotkey_exit,
1360         .resume = hotkey_resume,
1361         .acpi = &ibm_hotkey_acpidriver,
1362 };
1363
1364 /*************************************************************************
1365  * Bluetooth subdriver
1366  */
1367
1368 /* sysfs bluetooth enable ---------------------------------------------- */
1369 static ssize_t bluetooth_enable_show(struct device *dev,
1370                            struct device_attribute *attr,
1371                            char *buf)
1372 {
1373         int status;
1374
1375         status = bluetooth_get_radiosw();
1376         if (status < 0)
1377                 return status;
1378
1379         return snprintf(buf, PAGE_SIZE, "%d\n", status ? 1 : 0);
1380 }
1381
1382 static ssize_t bluetooth_enable_store(struct device *dev,
1383                             struct device_attribute *attr,
1384                             const char *buf, size_t count)
1385 {
1386         unsigned long t;
1387         int res;
1388
1389         if (parse_strtoul(buf, 1, &t))
1390                 return -EINVAL;
1391
1392         res = bluetooth_set_radiosw(t);
1393
1394         return (res) ? res : count;
1395 }
1396
1397 static struct device_attribute dev_attr_bluetooth_enable =
1398         __ATTR(bluetooth_enable, S_IWUSR | S_IRUGO,
1399                 bluetooth_enable_show, bluetooth_enable_store);
1400
1401 /* --------------------------------------------------------------------- */
1402
1403 static struct attribute *bluetooth_attributes[] = {
1404         &dev_attr_bluetooth_enable.attr,
1405         NULL
1406 };
1407
1408 static const struct attribute_group bluetooth_attr_group = {
1409         .attrs = bluetooth_attributes,
1410 };
1411
1412 static int __init bluetooth_init(struct ibm_init_struct *iibm)
1413 {
1414         int res;
1415         int status = 0;
1416
1417         vdbg_printk(TPACPI_DBG_INIT, "initializing bluetooth subdriver\n");
1418
1419         IBM_ACPIHANDLE_INIT(hkey);
1420
1421         /* bluetooth not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
1422            G4x, R30, R31, R40e, R50e, T20-22, X20-21 */
1423         tp_features.bluetooth = hkey_handle &&
1424             acpi_evalf(hkey_handle, &status, "GBDC", "qd");
1425
1426         vdbg_printk(TPACPI_DBG_INIT, "bluetooth is %s, status 0x%02x\n",
1427                 str_supported(tp_features.bluetooth),
1428                 status);
1429
1430         if (tp_features.bluetooth) {
1431                 if (!(status & TP_ACPI_BLUETOOTH_HWPRESENT)) {
1432                         /* no bluetooth hardware present in system */
1433                         tp_features.bluetooth = 0;
1434                         dbg_printk(TPACPI_DBG_INIT,
1435                                    "bluetooth hardware not installed\n");
1436                 } else {
1437                         res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
1438                                         &bluetooth_attr_group);
1439                         if (res)
1440                                 return res;
1441                 }
1442         }
1443
1444         return (tp_features.bluetooth)? 0 : 1;
1445 }
1446
1447 static void bluetooth_exit(void)
1448 {
1449         sysfs_remove_group(&tpacpi_pdev->dev.kobj,
1450                         &bluetooth_attr_group);
1451 }
1452
1453 static int bluetooth_get_radiosw(void)
1454 {
1455         int status;
1456
1457         if (!tp_features.bluetooth)
1458                 return -ENODEV;
1459
1460         if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
1461                 return -EIO;
1462
1463         return ((status & TP_ACPI_BLUETOOTH_RADIOSSW) != 0);
1464 }
1465
1466 static int bluetooth_set_radiosw(int radio_on)
1467 {
1468         int status;
1469
1470         if (!tp_features.bluetooth)
1471                 return -ENODEV;
1472
1473         if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
1474                 return -EIO;
1475         if (radio_on)
1476                 status |= TP_ACPI_BLUETOOTH_RADIOSSW;
1477         else
1478                 status &= ~TP_ACPI_BLUETOOTH_RADIOSSW;
1479         if (!acpi_evalf(hkey_handle, NULL, "SBDC", "vd", status))
1480                 return -EIO;
1481
1482         return 0;
1483 }
1484
1485 /* procfs -------------------------------------------------------------- */
1486 static int bluetooth_read(char *p)
1487 {
1488         int len = 0;
1489         int status = bluetooth_get_radiosw();
1490
1491         if (!tp_features.bluetooth)
1492                 len += sprintf(p + len, "status:\t\tnot supported\n");
1493         else {
1494                 len += sprintf(p + len, "status:\t\t%s\n",
1495                                 (status)? "enabled" : "disabled");
1496                 len += sprintf(p + len, "commands:\tenable, disable\n");
1497         }
1498
1499         return len;
1500 }
1501
1502 static int bluetooth_write(char *buf)
1503 {
1504         char *cmd;
1505
1506         if (!tp_features.bluetooth)
1507                 return -ENODEV;
1508
1509         while ((cmd = next_cmd(&buf))) {
1510                 if (strlencmp(cmd, "enable") == 0) {
1511                         bluetooth_set_radiosw(1);
1512                 } else if (strlencmp(cmd, "disable") == 0) {
1513                         bluetooth_set_radiosw(0);
1514                 } else
1515                         return -EINVAL;
1516         }
1517
1518         return 0;
1519 }
1520
1521 static struct ibm_struct bluetooth_driver_data = {
1522         .name = "bluetooth",
1523         .read = bluetooth_read,
1524         .write = bluetooth_write,
1525         .exit = bluetooth_exit,
1526 };
1527
1528 /*************************************************************************
1529  * Wan subdriver
1530  */
1531
1532 /* sysfs wan enable ---------------------------------------------------- */
1533 static ssize_t wan_enable_show(struct device *dev,
1534                            struct device_attribute *attr,
1535                            char *buf)
1536 {
1537         int status;
1538
1539         status = wan_get_radiosw();
1540         if (status < 0)
1541                 return status;
1542
1543         return snprintf(buf, PAGE_SIZE, "%d\n", status ? 1 : 0);
1544 }
1545
1546 static ssize_t wan_enable_store(struct device *dev,
1547                             struct device_attribute *attr,
1548                             const char *buf, size_t count)
1549 {
1550         unsigned long t;
1551         int res;
1552
1553         if (parse_strtoul(buf, 1, &t))
1554                 return -EINVAL;
1555
1556         res = wan_set_radiosw(t);
1557
1558         return (res) ? res : count;
1559 }
1560
1561 static struct device_attribute dev_attr_wan_enable =
1562         __ATTR(wwan_enable, S_IWUSR | S_IRUGO,
1563                 wan_enable_show, wan_enable_store);
1564
1565 /* --------------------------------------------------------------------- */
1566
1567 static struct attribute *wan_attributes[] = {
1568         &dev_attr_wan_enable.attr,
1569         NULL
1570 };
1571
1572 static const struct attribute_group wan_attr_group = {
1573         .attrs = wan_attributes,
1574 };
1575
1576 static int __init wan_init(struct ibm_init_struct *iibm)
1577 {
1578         int res;
1579         int status = 0;
1580
1581         vdbg_printk(TPACPI_DBG_INIT, "initializing wan subdriver\n");
1582
1583         IBM_ACPIHANDLE_INIT(hkey);
1584
1585         tp_features.wan = hkey_handle &&
1586             acpi_evalf(hkey_handle, &status, "GWAN", "qd");
1587
1588         vdbg_printk(TPACPI_DBG_INIT, "wan is %s, status 0x%02x\n",
1589                 str_supported(tp_features.wan),
1590                 status);
1591
1592         if (tp_features.wan) {
1593                 if (!(status & TP_ACPI_WANCARD_HWPRESENT)) {
1594                         /* no wan hardware present in system */
1595                         tp_features.wan = 0;
1596                         dbg_printk(TPACPI_DBG_INIT,
1597                                    "wan hardware not installed\n");
1598                 } else {
1599                         res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
1600                                         &wan_attr_group);
1601                         if (res)
1602                                 return res;
1603                 }
1604         }
1605
1606         return (tp_features.wan)? 0 : 1;
1607 }
1608
1609 static void wan_exit(void)
1610 {
1611         sysfs_remove_group(&tpacpi_pdev->dev.kobj,
1612                 &wan_attr_group);
1613 }
1614
1615 static int wan_get_radiosw(void)
1616 {
1617         int status;
1618
1619         if (!tp_features.wan)
1620                 return -ENODEV;
1621
1622         if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
1623                 return -EIO;
1624
1625         return ((status & TP_ACPI_WANCARD_RADIOSSW) != 0);
1626 }
1627
1628 static int wan_set_radiosw(int radio_on)
1629 {
1630         int status;
1631
1632         if (!tp_features.wan)
1633                 return -ENODEV;
1634
1635         if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
1636                 return -EIO;
1637         if (radio_on)
1638                 status |= TP_ACPI_WANCARD_RADIOSSW;
1639         else
1640                 status &= ~TP_ACPI_WANCARD_RADIOSSW;
1641         if (!acpi_evalf(hkey_handle, NULL, "SWAN", "vd", status))
1642                 return -EIO;
1643
1644         return 0;
1645 }
1646
1647 /* procfs -------------------------------------------------------------- */
1648 static int wan_read(char *p)
1649 {
1650         int len = 0;
1651         int status = wan_get_radiosw();
1652
1653         if (!tp_features.wan)
1654                 len += sprintf(p + len, "status:\t\tnot supported\n");
1655         else {
1656                 len += sprintf(p + len, "status:\t\t%s\n",
1657                                 (status)? "enabled" : "disabled");
1658                 len += sprintf(p + len, "commands:\tenable, disable\n");
1659         }
1660
1661         return len;
1662 }
1663
1664 static int wan_write(char *buf)
1665 {
1666         char *cmd;
1667
1668         if (!tp_features.wan)
1669                 return -ENODEV;
1670
1671         while ((cmd = next_cmd(&buf))) {
1672                 if (strlencmp(cmd, "enable") == 0) {
1673                         wan_set_radiosw(1);
1674                 } else if (strlencmp(cmd, "disable") == 0) {
1675                         wan_set_radiosw(0);
1676                 } else
1677                         return -EINVAL;
1678         }
1679
1680         return 0;
1681 }
1682
1683 static struct ibm_struct wan_driver_data = {
1684         .name = "wan",
1685         .read = wan_read,
1686         .write = wan_write,
1687         .exit = wan_exit,
1688         .flags.experimental = 1,
1689 };
1690
1691 /*************************************************************************
1692  * Video subdriver
1693  */
1694
1695 static enum video_access_mode video_supported;
1696 static int video_orig_autosw;
1697
1698 IBM_HANDLE(vid, root, "\\_SB.PCI.AGP.VGA",      /* 570 */
1699            "\\_SB.PCI0.AGP0.VID0",      /* 600e/x, 770x */
1700            "\\_SB.PCI0.VID0",   /* 770e */
1701            "\\_SB.PCI0.VID",    /* A21e, G4x, R50e, X30, X40 */
1702            "\\_SB.PCI0.AGP.VID",        /* all others */
1703            );                           /* R30, R31 */
1704
1705 IBM_HANDLE(vid2, root, "\\_SB.PCI0.AGPB.VID");  /* G41 */
1706
1707 static int __init video_init(struct ibm_init_struct *iibm)
1708 {
1709         int ivga;
1710
1711         vdbg_printk(TPACPI_DBG_INIT, "initializing video subdriver\n");
1712
1713         IBM_ACPIHANDLE_INIT(vid);
1714         IBM_ACPIHANDLE_INIT(vid2);
1715
1716         if (vid2_handle && acpi_evalf(NULL, &ivga, "\\IVGA", "d") && ivga)
1717                 /* G41, assume IVGA doesn't change */
1718                 vid_handle = vid2_handle;
1719
1720         if (!vid_handle)
1721                 /* video switching not supported on R30, R31 */
1722                 video_supported = TPACPI_VIDEO_NONE;
1723         else if (acpi_evalf(vid_handle, &video_orig_autosw, "SWIT", "qd"))
1724                 /* 570 */
1725                 video_supported = TPACPI_VIDEO_570;
1726         else if (acpi_evalf(vid_handle, &video_orig_autosw, "^VADL", "qd"))
1727                 /* 600e/x, 770e, 770x */
1728                 video_supported = TPACPI_VIDEO_770;
1729         else
1730                 /* all others */
1731                 video_supported = TPACPI_VIDEO_NEW;
1732
1733         vdbg_printk(TPACPI_DBG_INIT, "video is %s, mode %d\n",
1734                 str_supported(video_supported != TPACPI_VIDEO_NONE),
1735                 video_supported);
1736
1737         return (video_supported != TPACPI_VIDEO_NONE)? 0 : 1;
1738 }
1739
1740 static void video_exit(void)
1741 {
1742         dbg_printk(TPACPI_DBG_EXIT,
1743                    "restoring original video autoswitch mode\n");
1744         if (video_autosw_set(video_orig_autosw))
1745                 printk(IBM_ERR "error while trying to restore original "
1746                         "video autoswitch mode\n");
1747 }
1748
1749 static int video_outputsw_get(void)
1750 {
1751         int status = 0;
1752         int i;
1753
1754         switch (video_supported) {
1755         case TPACPI_VIDEO_570:
1756                 if (!acpi_evalf(NULL, &i, "\\_SB.PHS", "dd",
1757                                  TP_ACPI_VIDEO_570_PHSCMD))
1758                         return -EIO;
1759                 status = i & TP_ACPI_VIDEO_570_PHSMASK;
1760                 break;
1761         case TPACPI_VIDEO_770:
1762                 if (!acpi_evalf(NULL, &i, "\\VCDL", "d"))
1763                         return -EIO;
1764                 if (i)
1765                         status |= TP_ACPI_VIDEO_S_LCD;
1766                 if (!acpi_evalf(NULL, &i, "\\VCDC", "d"))
1767                         return -EIO;
1768                 if (i)
1769                         status |= TP_ACPI_VIDEO_S_CRT;
1770                 break;
1771         case TPACPI_VIDEO_NEW:
1772                 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 1) ||
1773                     !acpi_evalf(NULL, &i, "\\VCDC", "d"))
1774                         return -EIO;
1775                 if (i)
1776                         status |= TP_ACPI_VIDEO_S_CRT;
1777
1778                 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0) ||
1779                     !acpi_evalf(NULL, &i, "\\VCDL", "d"))
1780                         return -EIO;
1781                 if (i)
1782                         status |= TP_ACPI_VIDEO_S_LCD;
1783                 if (!acpi_evalf(NULL, &i, "\\VCDD", "d"))
1784                         return -EIO;
1785                 if (i)
1786                         status |= TP_ACPI_VIDEO_S_DVI;
1787                 break;
1788         default:
1789                 return -ENOSYS;
1790         }
1791
1792         return status;
1793 }
1794
1795 static int video_outputsw_set(int status)
1796 {
1797         int autosw;
1798         int res = 0;
1799
1800         switch (video_supported) {
1801         case TPACPI_VIDEO_570:
1802                 res = acpi_evalf(NULL, NULL,
1803                                  "\\_SB.PHS2", "vdd",
1804                                  TP_ACPI_VIDEO_570_PHS2CMD,
1805                                  status | TP_ACPI_VIDEO_570_PHS2SET);
1806                 break;
1807         case TPACPI_VIDEO_770:
1808                 autosw = video_autosw_get();
1809                 if (autosw < 0)
1810                         return autosw;
1811
1812                 res = video_autosw_set(1);
1813                 if (res)
1814                         return res;
1815                 res = acpi_evalf(vid_handle, NULL,
1816                                  "ASWT", "vdd", status * 0x100, 0);
1817                 if (!autosw && video_autosw_set(autosw)) {
1818                         printk(IBM_ERR "video auto-switch left enabled due to error\n");
1819                         return -EIO;
1820                 }
1821                 break;
1822         case TPACPI_VIDEO_NEW:
1823                 res = acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0x80) &&
1824                         acpi_evalf(NULL, NULL, "\\VSDS", "vdd", status, 1);
1825                 break;
1826         default:
1827                 return -ENOSYS;
1828         }
1829
1830         return (res)? 0 : -EIO;
1831 }
1832
1833 static int video_autosw_get(void)
1834 {
1835         int autosw = 0;
1836
1837         switch (video_supported) {
1838         case TPACPI_VIDEO_570:
1839                 if (!acpi_evalf(vid_handle, &autosw, "SWIT", "d"))
1840                         return -EIO;
1841                 break;
1842         case TPACPI_VIDEO_770:
1843         case TPACPI_VIDEO_NEW:
1844                 if (!acpi_evalf(vid_handle, &autosw, "^VDEE", "d"))
1845                         return -EIO;
1846                 break;
1847         default:
1848                 return -ENOSYS;
1849         }
1850
1851         return autosw & 1;
1852 }
1853
1854 static int video_autosw_set(int enable)
1855 {
1856         if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", (enable)? 1 : 0))
1857                 return -EIO;
1858         return 0;
1859 }
1860
1861 static int video_outputsw_cycle(void)
1862 {
1863         int autosw = video_autosw_get();
1864         int res;
1865
1866         if (autosw < 0)
1867                 return autosw;
1868
1869         switch (video_supported) {
1870         case TPACPI_VIDEO_570:
1871                 res = video_autosw_set(1);
1872                 if (res)
1873                         return res;
1874                 res = acpi_evalf(ec_handle, NULL, "_Q16", "v");
1875                 break;
1876         case TPACPI_VIDEO_770:
1877         case TPACPI_VIDEO_NEW:
1878                 res = video_autosw_set(1);
1879                 if (res)
1880                         return res;
1881                 res = acpi_evalf(vid_handle, NULL, "VSWT", "v");
1882                 break;
1883         default:
1884                 return -ENOSYS;
1885         }
1886         if (!autosw && video_autosw_set(autosw)) {
1887                 printk(IBM_ERR "video auto-switch left enabled due to error\n");
1888                 return -EIO;
1889         }
1890
1891         return (res)? 0 : -EIO;
1892 }
1893
1894 static int video_expand_toggle(void)
1895 {
1896         switch (video_supported) {
1897         case TPACPI_VIDEO_570:
1898                 return acpi_evalf(ec_handle, NULL, "_Q17", "v")?
1899                         0 : -EIO;
1900         case TPACPI_VIDEO_770:
1901                 return acpi_evalf(vid_handle, NULL, "VEXP", "v")?
1902                         0 : -EIO;
1903         case TPACPI_VIDEO_NEW:
1904                 return acpi_evalf(NULL, NULL, "\\VEXP", "v")?
1905                         0 : -EIO;
1906         default:
1907                 return -ENOSYS;
1908         }
1909         /* not reached */
1910 }
1911
1912 static int video_read(char *p)
1913 {
1914         int status, autosw;
1915         int len = 0;
1916
1917         if (video_supported == TPACPI_VIDEO_NONE) {
1918                 len += sprintf(p + len, "status:\t\tnot supported\n");
1919                 return len;
1920         }
1921
1922         status = video_outputsw_get();
1923         if (status < 0)
1924                 return status;
1925
1926         autosw = video_autosw_get();
1927         if (autosw < 0)
1928                 return autosw;
1929
1930         len += sprintf(p + len, "status:\t\tsupported\n");
1931         len += sprintf(p + len, "lcd:\t\t%s\n", enabled(status, 0));
1932         len += sprintf(p + len, "crt:\t\t%s\n", enabled(status, 1));
1933         if (video_supported == TPACPI_VIDEO_NEW)
1934                 len += sprintf(p + len, "dvi:\t\t%s\n", enabled(status, 3));
1935         len += sprintf(p + len, "auto:\t\t%s\n", enabled(autosw, 0));
1936         len += sprintf(p + len, "commands:\tlcd_enable, lcd_disable\n");
1937         len += sprintf(p + len, "commands:\tcrt_enable, crt_disable\n");
1938         if (video_supported == TPACPI_VIDEO_NEW)
1939                 len += sprintf(p + len, "commands:\tdvi_enable, dvi_disable\n");
1940         len += sprintf(p + len, "commands:\tauto_enable, auto_disable\n");
1941         len += sprintf(p + len, "commands:\tvideo_switch, expand_toggle\n");
1942
1943         return len;
1944 }
1945
1946 static int video_write(char *buf)
1947 {
1948         char *cmd;
1949         int enable, disable, status;
1950         int res;
1951
1952         if (video_supported == TPACPI_VIDEO_NONE)
1953                 return -ENODEV;
1954
1955         enable = 0;
1956         disable = 0;
1957
1958         while ((cmd = next_cmd(&buf))) {
1959                 if (strlencmp(cmd, "lcd_enable") == 0) {
1960                         enable |= TP_ACPI_VIDEO_S_LCD;
1961                 } else if (strlencmp(cmd, "lcd_disable") == 0) {
1962                         disable |= TP_ACPI_VIDEO_S_LCD;
1963                 } else if (strlencmp(cmd, "crt_enable") == 0) {
1964                         enable |= TP_ACPI_VIDEO_S_CRT;
1965                 } else if (strlencmp(cmd, "crt_disable") == 0) {
1966                         disable |= TP_ACPI_VIDEO_S_CRT;
1967                 } else if (video_supported == TPACPI_VIDEO_NEW &&
1968                            strlencmp(cmd, "dvi_enable") == 0) {
1969                         enable |= TP_ACPI_VIDEO_S_DVI;
1970                 } else if (video_supported == TPACPI_VIDEO_NEW &&
1971                            strlencmp(cmd, "dvi_disable") == 0) {
1972                         disable |= TP_ACPI_VIDEO_S_DVI;
1973                 } else if (strlencmp(cmd, "auto_enable") == 0) {
1974                         res = video_autosw_set(1);
1975                         if (res)
1976                                 return res;
1977                 } else if (strlencmp(cmd, "auto_disable") == 0) {
1978                         res = video_autosw_set(0);
1979                         if (res)
1980                                 return res;
1981                 } else if (strlencmp(cmd, "video_switch") == 0) {
1982                         res = video_outputsw_cycle();
1983                         if (res)
1984                                 return res;
1985                 } else if (strlencmp(cmd, "expand_toggle") == 0) {
1986                         res = video_expand_toggle();
1987                         if (res)
1988                                 return res;
1989                 } else
1990                         return -EINVAL;
1991         }
1992
1993         if (enable || disable) {
1994                 status = video_outputsw_get();
1995                 if (status < 0)
1996                         return status;
1997                 res = video_outputsw_set((status & ~disable) | enable);
1998                 if (res)
1999                         return res;
2000         }
2001
2002         return 0;
2003 }
2004
2005 static struct ibm_struct video_driver_data = {
2006         .name = "video",
2007         .read = video_read,
2008         .write = video_write,
2009         .exit = video_exit,
2010 };
2011
2012 /*************************************************************************
2013  * Light (thinklight) subdriver
2014  */
2015
2016 IBM_HANDLE(lght, root, "\\LGHT");       /* A21e, A2xm/p, T20-22, X20-21 */
2017 IBM_HANDLE(ledb, ec, "LEDB");           /* G4x */
2018
2019 static int __init light_init(struct ibm_init_struct *iibm)
2020 {
2021         vdbg_printk(TPACPI_DBG_INIT, "initializing light subdriver\n");
2022
2023         IBM_ACPIHANDLE_INIT(ledb);
2024         IBM_ACPIHANDLE_INIT(lght);
2025         IBM_ACPIHANDLE_INIT(cmos);
2026
2027         /* light not supported on 570, 600e/x, 770e, 770x, G4x, R30, R31 */
2028         tp_features.light = (cmos_handle || lght_handle) && !ledb_handle;
2029
2030         if (tp_features.light)
2031                 /* light status not supported on
2032                    570, 600e/x, 770e, 770x, G4x, R30, R31, R32, X20 */
2033                 tp_features.light_status =
2034                         acpi_evalf(ec_handle, NULL, "KBLT", "qv");
2035
2036         vdbg_printk(TPACPI_DBG_INIT, "light is %s\n",
2037                 str_supported(tp_features.light));
2038
2039         return (tp_features.light)? 0 : 1;
2040 }
2041
2042 static int light_read(char *p)
2043 {
2044         int len = 0;
2045         int status = 0;
2046
2047         if (!tp_features.light) {
2048                 len += sprintf(p + len, "status:\t\tnot supported\n");
2049         } else if (!tp_features.light_status) {
2050                 len += sprintf(p + len, "status:\t\tunknown\n");
2051                 len += sprintf(p + len, "commands:\ton, off\n");
2052         } else {
2053                 if (!acpi_evalf(ec_handle, &status, "KBLT", "d"))
2054                         return -EIO;
2055                 len += sprintf(p + len, "status:\t\t%s\n", onoff(status, 0));
2056                 len += sprintf(p + len, "commands:\ton, off\n");
2057         }
2058
2059         return len;
2060 }
2061
2062 static int light_write(char *buf)
2063 {
2064         int cmos_cmd, lght_cmd;
2065         char *cmd;
2066         int success;
2067
2068         if (!tp_features.light)
2069                 return -ENODEV;
2070
2071         while ((cmd = next_cmd(&buf))) {
2072                 if (strlencmp(cmd, "on") == 0) {
2073                         cmos_cmd = 0x0c;
2074                         lght_cmd = 1;
2075                 } else if (strlencmp(cmd, "off") == 0) {
2076                         cmos_cmd = 0x0d;
2077                         lght_cmd = 0;
2078                 } else
2079                         return -EINVAL;
2080
2081                 success = cmos_handle ?
2082                     acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd) :
2083                     acpi_evalf(lght_handle, NULL, NULL, "vd", lght_cmd);
2084                 if (!success)
2085                         return -EIO;
2086         }
2087
2088         return 0;
2089 }
2090
2091 static struct ibm_struct light_driver_data = {
2092         .name = "light",
2093         .read = light_read,
2094         .write = light_write,
2095 };
2096
2097 /*************************************************************************
2098  * Dock subdriver
2099  */
2100
2101 #ifdef CONFIG_THINKPAD_ACPI_DOCK
2102
2103 IBM_HANDLE(dock, root, "\\_SB.GDCK",    /* X30, X31, X40 */
2104            "\\_SB.PCI0.DOCK",   /* 600e/x,770e,770x,A2xm/p,T20-22,X20-21 */
2105            "\\_SB.PCI0.PCI1.DOCK",      /* all others */
2106            "\\_SB.PCI.ISA.SLCE",        /* 570 */
2107     );                          /* A21e,G4x,R30,R31,R32,R40,R40e,R50e */
2108
2109 /* don't list other alternatives as we install a notify handler on the 570 */
2110 IBM_HANDLE(pci, root, "\\_SB.PCI");     /* 570 */
2111
2112 static const struct acpi_device_id ibm_pci_device_ids[] = {
2113         {PCI_ROOT_HID_STRING, 0},
2114         {"", 0},
2115 };
2116
2117 static struct tp_acpi_drv_struct ibm_dock_acpidriver[2] = {
2118         {
2119          .notify = dock_notify,
2120          .handle = &dock_handle,
2121          .type = ACPI_SYSTEM_NOTIFY,
2122         },
2123         {
2124         /* THIS ONE MUST NEVER BE USED FOR DRIVER AUTOLOADING.
2125          * We just use it to get notifications of dock hotplug
2126          * in very old thinkpads */
2127          .hid = ibm_pci_device_ids,
2128          .notify = dock_notify,
2129          .handle = &pci_handle,
2130          .type = ACPI_SYSTEM_NOTIFY,
2131         },
2132 };
2133
2134 static struct ibm_struct dock_driver_data[2] = {
2135         {
2136          .name = "dock",
2137          .read = dock_read,
2138          .write = dock_write,
2139          .acpi = &ibm_dock_acpidriver[0],
2140         },
2141         {
2142          .name = "dock",
2143          .acpi = &ibm_dock_acpidriver[1],
2144         },
2145 };
2146
2147 #define dock_docked() (_sta(dock_handle) & 1)
2148
2149 static int __init dock_init(struct ibm_init_struct *iibm)
2150 {
2151         vdbg_printk(TPACPI_DBG_INIT, "initializing dock subdriver\n");
2152
2153         IBM_ACPIHANDLE_INIT(dock);
2154
2155         vdbg_printk(TPACPI_DBG_INIT, "dock is %s\n",
2156                 str_supported(dock_handle != NULL));
2157
2158         return (dock_handle)? 0 : 1;
2159 }
2160
2161 static int __init dock_init2(struct ibm_init_struct *iibm)
2162 {
2163         int dock2_needed;
2164
2165         vdbg_printk(TPACPI_DBG_INIT, "initializing dock subdriver part 2\n");
2166
2167         if (dock_driver_data[0].flags.acpi_driver_registered &&
2168             dock_driver_data[0].flags.acpi_notify_installed) {
2169                 IBM_ACPIHANDLE_INIT(pci);
2170                 dock2_needed = (pci_handle != NULL);
2171                 vdbg_printk(TPACPI_DBG_INIT,
2172                             "dock PCI handler for the TP 570 is %s\n",
2173                             str_supported(dock2_needed));
2174         } else {
2175                 vdbg_printk(TPACPI_DBG_INIT,
2176                 "dock subdriver part 2 not required\n");
2177                 dock2_needed = 0;
2178         }
2179
2180         return (dock2_needed)? 0 : 1;
2181 }
2182
2183 static void dock_notify(struct ibm_struct *ibm, u32 event)
2184 {
2185         int docked = dock_docked();
2186         int pci = ibm->acpi->hid && ibm->acpi->device &&
2187                 acpi_match_device_ids(ibm->acpi->device, ibm_pci_device_ids);
2188         int data;
2189
2190         if (event == 1 && !pci) /* 570 */
2191                 data = 1;       /* button */
2192         else if (event == 1 && pci)     /* 570 */
2193                 data = 3;       /* dock */
2194         else if (event == 3 && docked)
2195                 data = 1;       /* button */
2196         else if (event == 3 && !docked)
2197                 data = 2;       /* undock */
2198         else if (event == 0 && docked)
2199                 data = 3;       /* dock */
2200         else {
2201                 printk(IBM_ERR "unknown dock event %d, status %d\n",
2202                        event, _sta(dock_handle));
2203                 data = 0;       /* unknown */
2204         }
2205         acpi_bus_generate_proc_event(ibm->acpi->device, event, data);
2206         acpi_bus_generate_netlink_event(ibm->acpi->device->pnp.device_class,
2207                                           ibm->acpi->device->dev.bus_id,
2208                                           event, data);
2209 }
2210
2211 static int dock_read(char *p)
2212 {
2213         int len = 0;
2214         int docked = dock_docked();
2215
2216         if (!dock_handle)
2217                 len += sprintf(p + len, "status:\t\tnot supported\n");
2218         else if (!docked)
2219                 len += sprintf(p + len, "status:\t\tundocked\n");
2220         else {
2221                 len += sprintf(p + len, "status:\t\tdocked\n");
2222                 len += sprintf(p + len, "commands:\tdock, undock\n");
2223         }
2224
2225         return len;
2226 }
2227
2228 static int dock_write(char *buf)
2229 {
2230         char *cmd;
2231
2232         if (!dock_docked())
2233                 return -ENODEV;
2234
2235         while ((cmd = next_cmd(&buf))) {
2236                 if (strlencmp(cmd, "undock") == 0) {
2237                         if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 0) ||
2238                             !acpi_evalf(dock_handle, NULL, "_EJ0", "vd", 1))
2239                                 return -EIO;
2240                 } else if (strlencmp(cmd, "dock") == 0) {
2241                         if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 1))
2242                                 return -EIO;
2243                 } else
2244                         return -EINVAL;
2245         }
2246
2247         return 0;
2248 }
2249
2250 #endif /* CONFIG_THINKPAD_ACPI_DOCK */
2251
2252 /*************************************************************************
2253  * Bay subdriver
2254  */
2255
2256 #ifdef CONFIG_THINKPAD_ACPI_BAY
2257 IBM_HANDLE(bay, root, "\\_SB.PCI.IDE.SECN.MAST",        /* 570 */
2258            "\\_SB.PCI0.IDE0.IDES.IDSM", /* 600e/x, 770e, 770x */
2259            "\\_SB.PCI0.SATA.SCND.MSTR", /* T60, X60, Z60 */
2260            "\\_SB.PCI0.IDE0.SCND.MSTR", /* all others */
2261            );                           /* A21e, R30, R31 */
2262 IBM_HANDLE(bay_ej, bay, "_EJ3", /* 600e/x, A2xm/p, A3x */
2263            "_EJ0",              /* all others */
2264            );                   /* 570,A21e,G4x,R30,R31,R32,R40e,R50e */
2265 IBM_HANDLE(bay2, root, "\\_SB.PCI0.IDE0.PRIM.SLAV",     /* A3x, R32 */
2266            "\\_SB.PCI0.IDE0.IDEP.IDPS", /* 600e/x, 770e, 770x */
2267            );                           /* all others */
2268 IBM_HANDLE(bay2_ej, bay2, "_EJ3",       /* 600e/x, 770e, A3x */
2269            "_EJ0",                      /* 770x */
2270            );                           /* all others */
2271
2272 static int __init bay_init(struct ibm_init_struct *iibm)
2273 {
2274         vdbg_printk(TPACPI_DBG_INIT, "initializing bay subdriver\n");
2275
2276         IBM_ACPIHANDLE_INIT(bay);
2277         if (bay_handle)
2278                 IBM_ACPIHANDLE_INIT(bay_ej);
2279         IBM_ACPIHANDLE_INIT(bay2);
2280         if (bay2_handle)
2281                 IBM_ACPIHANDLE_INIT(bay2_ej);
2282
2283         tp_features.bay_status = bay_handle &&
2284                 acpi_evalf(bay_handle, NULL, "_STA", "qv");
2285         tp_features.bay_status2 = bay2_handle &&
2286                 acpi_evalf(bay2_handle, NULL, "_STA", "qv");
2287
2288         tp_features.bay_eject = bay_handle && bay_ej_handle &&
2289                 (strlencmp(bay_ej_path, "_EJ0") == 0 || experimental);
2290         tp_features.bay_eject2 = bay2_handle && bay2_ej_handle &&
2291                 (strlencmp(bay2_ej_path, "_EJ0") == 0 || experimental);
2292
2293         vdbg_printk(TPACPI_DBG_INIT,
2294                 "bay 1: status %s, eject %s; bay 2: status %s, eject %s\n",
2295                 str_supported(tp_features.bay_status),
2296                 str_supported(tp_features.bay_eject),
2297                 str_supported(tp_features.bay_status2),
2298                 str_supported(tp_features.bay_eject2));
2299
2300         return (tp_features.bay_status || tp_features.bay_eject ||
2301                 tp_features.bay_status2 || tp_features.bay_eject2)? 0 : 1;
2302 }
2303
2304 static void bay_notify(struct ibm_struct *ibm, u32 event)
2305 {
2306         acpi_bus_generate_proc_event(ibm->acpi->device, event, 0);
2307         acpi_bus_generate_netlink_event(ibm->acpi->device->pnp.device_class,
2308                                           ibm->acpi->device->dev.bus_id,
2309                                           event, 0);
2310 }
2311
2312 #define bay_occupied(b) (_sta(b##_handle) & 1)
2313
2314 static int bay_read(char *p)
2315 {
2316         int len = 0;
2317         int occupied = bay_occupied(bay);
2318         int occupied2 = bay_occupied(bay2);
2319         int eject, eject2;
2320
2321         len += sprintf(p + len, "status:\t\t%s\n",
2322                 tp_features.bay_status ?
2323                         (occupied ? "occupied" : "unoccupied") :
2324                                 "not supported");
2325         if (tp_features.bay_status2)
2326                 len += sprintf(p + len, "status2:\t%s\n", occupied2 ?
2327                                "occupied" : "unoccupied");
2328
2329         eject = tp_features.bay_eject && occupied;
2330         eject2 = tp_features.bay_eject2 && occupied2;
2331
2332         if (eject && eject2)
2333                 len += sprintf(p + len, "commands:\teject, eject2\n");
2334         else if (eject)
2335                 len += sprintf(p + len, "commands:\teject\n");
2336         else if (eject2)
2337                 len += sprintf(p + len, "commands:\teject2\n");
2338
2339         return len;
2340 }
2341
2342 static int bay_write(char *buf)
2343 {
2344         char *cmd;
2345
2346         if (!tp_features.bay_eject && !tp_features.bay_eject2)
2347                 return -ENODEV;
2348
2349         while ((cmd = next_cmd(&buf))) {
2350                 if (tp_features.bay_eject && strlencmp(cmd, "eject") == 0) {
2351                         if (!acpi_evalf(bay_ej_handle, NULL, NULL, "vd", 1))
2352                                 return -EIO;
2353                 } else if (tp_features.bay_eject2 &&
2354                            strlencmp(cmd, "eject2") == 0) {
2355                         if (!acpi_evalf(bay2_ej_handle, NULL, NULL, "vd", 1))
2356                                 return -EIO;
2357                 } else
2358                         return -EINVAL;
2359         }
2360
2361         return 0;
2362 }
2363
2364 static struct tp_acpi_drv_struct ibm_bay_acpidriver = {
2365         .notify = bay_notify,
2366         .handle = &bay_handle,
2367         .type = ACPI_SYSTEM_NOTIFY,
2368 };
2369
2370 static struct ibm_struct bay_driver_data = {
2371         .name = "bay",
2372         .read = bay_read,
2373         .write = bay_write,
2374         .acpi = &ibm_bay_acpidriver,
2375 };
2376
2377 #endif /* CONFIG_THINKPAD_ACPI_BAY */
2378
2379 /*************************************************************************
2380  * CMOS subdriver
2381  */
2382
2383 /* sysfs cmos_command -------------------------------------------------- */
2384 static ssize_t cmos_command_store(struct device *dev,
2385                             struct device_attribute *attr,
2386                             const char *buf, size_t count)
2387 {
2388         unsigned long cmos_cmd;
2389         int res;
2390
2391         if (parse_strtoul(buf, 21, &cmos_cmd))
2392                 return -EINVAL;
2393
2394         res = issue_thinkpad_cmos_command(cmos_cmd);
2395         return (res)? res : count;
2396 }
2397
2398 static struct device_attribute dev_attr_cmos_command =
2399         __ATTR(cmos_command, S_IWUSR, NULL, cmos_command_store);
2400
2401 /* --------------------------------------------------------------------- */
2402
2403 static int __init cmos_init(struct ibm_init_struct *iibm)
2404 {
2405         int res;
2406
2407         vdbg_printk(TPACPI_DBG_INIT,
2408                 "initializing cmos commands subdriver\n");
2409
2410         IBM_ACPIHANDLE_INIT(cmos);
2411
2412         vdbg_printk(TPACPI_DBG_INIT, "cmos commands are %s\n",
2413                 str_supported(cmos_handle != NULL));
2414
2415         res = device_create_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
2416         if (res)
2417                 return res;
2418
2419         return (cmos_handle)? 0 : 1;
2420 }
2421
2422 static void cmos_exit(void)
2423 {
2424         device_remove_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
2425 }
2426
2427 static int cmos_read(char *p)
2428 {
2429         int len = 0;
2430
2431         /* cmos not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
2432            R30, R31, T20-22, X20-21 */
2433         if (!cmos_handle)
2434                 len += sprintf(p + len, "status:\t\tnot supported\n");
2435         else {
2436                 len += sprintf(p + len, "status:\t\tsupported\n");
2437                 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-21)\n");
2438         }
2439
2440         return len;
2441 }
2442
2443 static int cmos_write(char *buf)
2444 {
2445         char *cmd;
2446         int cmos_cmd, res;
2447
2448         while ((cmd = next_cmd(&buf))) {
2449                 if (sscanf(cmd, "%u", &cmos_cmd) == 1 &&
2450                     cmos_cmd >= 0 && cmos_cmd <= 21) {
2451                         /* cmos_cmd set */
2452                 } else
2453                         return -EINVAL;
2454
2455                 res = issue_thinkpad_cmos_command(cmos_cmd);
2456                 if (res)
2457                         return res;
2458         }
2459
2460         return 0;
2461 }
2462
2463 static struct ibm_struct cmos_driver_data = {
2464         .name = "cmos",
2465         .read = cmos_read,
2466         .write = cmos_write,
2467         .exit = cmos_exit,
2468 };
2469
2470 /*************************************************************************
2471  * LED subdriver
2472  */
2473
2474 static enum led_access_mode led_supported;
2475
2476 IBM_HANDLE(led, ec, "SLED",     /* 570 */
2477            "SYSL",              /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
2478            "LED",               /* all others */
2479            );                   /* R30, R31 */
2480
2481 static int __init led_init(struct ibm_init_struct *iibm)
2482 {
2483         vdbg_printk(TPACPI_DBG_INIT, "initializing LED subdriver\n");
2484
2485         IBM_ACPIHANDLE_INIT(led);
2486
2487         if (!led_handle)
2488                 /* led not supported on R30, R31 */
2489                 led_supported = TPACPI_LED_NONE;
2490         else if (strlencmp(led_path, "SLED") == 0)
2491                 /* 570 */
2492                 led_supported = TPACPI_LED_570;
2493         else if (strlencmp(led_path, "SYSL") == 0)
2494                 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
2495                 led_supported = TPACPI_LED_OLD;
2496         else
2497                 /* all others */
2498                 led_supported = TPACPI_LED_NEW;
2499
2500         vdbg_printk(TPACPI_DBG_INIT, "LED commands are %s, mode %d\n",
2501                 str_supported(led_supported), led_supported);
2502
2503         return (led_supported != TPACPI_LED_NONE)? 0 : 1;
2504 }
2505
2506 #define led_status(s) ((s) == 0 ? "off" : ((s) == 1 ? "on" : "blinking"))
2507
2508 static int led_read(char *p)
2509 {
2510         int len = 0;
2511
2512         if (!led_supported) {
2513                 len += sprintf(p + len, "status:\t\tnot supported\n");
2514                 return len;
2515         }
2516         len += sprintf(p + len, "status:\t\tsupported\n");
2517
2518         if (led_supported == TPACPI_LED_570) {
2519                 /* 570 */
2520                 int i, status;
2521                 for (i = 0; i < 8; i++) {
2522                         if (!acpi_evalf(ec_handle,
2523                                         &status, "GLED", "dd", 1 << i))
2524                                 return -EIO;
2525                         len += sprintf(p + len, "%d:\t\t%s\n",
2526                                        i, led_status(status));
2527                 }
2528         }
2529
2530         len += sprintf(p + len, "commands:\t"
2531                        "<led> on, <led> off, <led> blink (<led> is 0-7)\n");
2532
2533         return len;
2534 }
2535
2536 /* off, on, blink */
2537 static const int led_sled_arg1[] = { 0, 1, 3 };
2538 static const int led_exp_hlbl[] = { 0, 0, 1 };  /* led# * */
2539 static const int led_exp_hlcl[] = { 0, 1, 1 };  /* led# * */
2540 static const int led_led_arg1[] = { 0, 0x80, 0xc0 };
2541
2542 static int led_write(char *buf)
2543 {
2544         char *cmd;
2545         int led, ind, ret;
2546
2547         if (!led_supported)
2548                 return -ENODEV;
2549
2550         while ((cmd = next_cmd(&buf))) {
2551                 if (sscanf(cmd, "%d", &led) != 1 || led < 0 || led > 7)
2552                         return -EINVAL;
2553
2554                 if (strstr(cmd, "off")) {
2555                         ind = 0;
2556                 } else if (strstr(cmd, "on")) {
2557                         ind = 1;
2558                 } else if (strstr(cmd, "blink")) {
2559                         ind = 2;
2560                 } else
2561                         return -EINVAL;
2562
2563                 if (led_supported == TPACPI_LED_570) {
2564                         /* 570 */
2565                         led = 1 << led;
2566                         if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
2567                                         led, led_sled_arg1[ind]))
2568                                 return -EIO;
2569                 } else if (led_supported == TPACPI_LED_OLD) {
2570                         /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */
2571                         led = 1 << led;
2572                         ret = ec_write(TPACPI_LED_EC_HLMS, led);
2573                         if (ret >= 0)
2574                                 ret =
2575                                     ec_write(TPACPI_LED_EC_HLBL,
2576                                              led * led_exp_hlbl[ind]);
2577                         if (ret >= 0)
2578                                 ret =
2579                                     ec_write(TPACPI_LED_EC_HLCL,
2580                                              led * led_exp_hlcl[ind]);
2581                         if (ret < 0)
2582                                 return ret;
2583                 } else {
2584                         /* all others */
2585                         if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
2586                                         led, led_led_arg1[ind]))
2587                                 return -EIO;
2588                 }
2589         }
2590
2591         return 0;
2592 }
2593
2594 static struct ibm_struct led_driver_data = {
2595         .name = "led",
2596         .read = led_read,
2597         .write = led_write,
2598 };
2599
2600 /*************************************************************************
2601  * Beep subdriver
2602  */
2603
2604 IBM_HANDLE(beep, ec, "BEEP");   /* all except R30, R31 */
2605
2606 static int __init beep_init(struct ibm_init_struct *iibm)
2607 {
2608         vdbg_printk(TPACPI_DBG_INIT, "initializing beep subdriver\n");
2609
2610         IBM_ACPIHANDLE_INIT(beep);
2611
2612         vdbg_printk(TPACPI_DBG_INIT, "beep is %s\n",
2613                 str_supported(beep_handle != NULL));
2614
2615         return (beep_handle)? 0 : 1;
2616 }
2617
2618 static int beep_read(char *p)
2619 {
2620         int len = 0;
2621
2622         if (!beep_handle)
2623                 len += sprintf(p + len, "status:\t\tnot supported\n");
2624         else {
2625                 len += sprintf(p + len, "status:\t\tsupported\n");
2626                 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-17)\n");
2627         }
2628
2629         return len;
2630 }
2631
2632 static int beep_write(char *buf)
2633 {
2634         char *cmd;
2635         int beep_cmd;
2636
2637         if (!beep_handle)
2638                 return -ENODEV;
2639
2640         while ((cmd = next_cmd(&buf))) {
2641                 if (sscanf(cmd, "%u", &beep_cmd) == 1 &&
2642                     beep_cmd >= 0 && beep_cmd <= 17) {
2643                         /* beep_cmd set */
2644                 } else
2645                         return -EINVAL;
2646                 if (!acpi_evalf(beep_handle, NULL, NULL, "vdd", beep_cmd, 0))
2647                         return -EIO;
2648         }
2649
2650         return 0;
2651 }
2652
2653 static struct ibm_struct beep_driver_data = {
2654         .name = "beep",
2655         .read = beep_read,
2656         .write = beep_write,
2657 };
2658
2659 /*************************************************************************
2660  * Thermal subdriver
2661  */
2662
2663 static enum thermal_access_mode thermal_read_mode;
2664
2665 /* sysfs temp##_input -------------------------------------------------- */
2666
2667 static ssize_t thermal_temp_input_show(struct device *dev,
2668                            struct device_attribute *attr,
2669                            char *buf)
2670 {
2671         struct sensor_device_attribute *sensor_attr =
2672                                         to_sensor_dev_attr(attr);
2673         int idx = sensor_attr->index;
2674         s32 value;
2675         int res;
2676
2677         res = thermal_get_sensor(idx, &value);
2678         if (res)
2679                 return res;
2680         if (value == TP_EC_THERMAL_TMP_NA * 1000)
2681                 return -ENXIO;
2682
2683         return snprintf(buf, PAGE_SIZE, "%d\n", value);
2684 }
2685
2686 #define THERMAL_SENSOR_ATTR_TEMP(_idxA, _idxB) \
2687          SENSOR_ATTR(temp##_idxA##_input, S_IRUGO, thermal_temp_input_show, NULL, _idxB)
2688
2689 static struct sensor_device_attribute sensor_dev_attr_thermal_temp_input[] = {
2690         THERMAL_SENSOR_ATTR_TEMP(1, 0),
2691         THERMAL_SENSOR_ATTR_TEMP(2, 1),
2692         THERMAL_SENSOR_ATTR_TEMP(3, 2),
2693         THERMAL_SENSOR_ATTR_TEMP(4, 3),
2694         THERMAL_SENSOR_ATTR_TEMP(5, 4),
2695         THERMAL_SENSOR_ATTR_TEMP(6, 5),
2696         THERMAL_SENSOR_ATTR_TEMP(7, 6),
2697         THERMAL_SENSOR_ATTR_TEMP(8, 7),
2698         THERMAL_SENSOR_ATTR_TEMP(9, 8),
2699         THERMAL_SENSOR_ATTR_TEMP(10, 9),
2700         THERMAL_SENSOR_ATTR_TEMP(11, 10),
2701         THERMAL_SENSOR_ATTR_TEMP(12, 11),
2702         THERMAL_SENSOR_ATTR_TEMP(13, 12),
2703         THERMAL_SENSOR_ATTR_TEMP(14, 13),
2704         THERMAL_SENSOR_ATTR_TEMP(15, 14),
2705         THERMAL_SENSOR_ATTR_TEMP(16, 15),
2706 };
2707
2708 #define THERMAL_ATTRS(X) \
2709         &sensor_dev_attr_thermal_temp_input[X].dev_attr.attr
2710
2711 static struct attribute *thermal_temp_input_attr[] = {
2712         THERMAL_ATTRS(8),
2713         THERMAL_ATTRS(9),
2714         THERMAL_ATTRS(10),
2715         THERMAL_ATTRS(11),
2716         THERMAL_ATTRS(12),
2717         THERMAL_ATTRS(13),
2718         THERMAL_ATTRS(14),
2719         THERMAL_ATTRS(15),
2720         THERMAL_ATTRS(0),
2721         THERMAL_ATTRS(1),
2722         THERMAL_ATTRS(2),
2723         THERMAL_ATTRS(3),
2724         THERMAL_ATTRS(4),
2725         THERMAL_ATTRS(5),
2726         THERMAL_ATTRS(6),
2727         THERMAL_ATTRS(7),
2728         NULL
2729 };
2730
2731 static const struct attribute_group thermal_temp_input16_group = {
2732         .attrs = thermal_temp_input_attr
2733 };
2734
2735 static const struct attribute_group thermal_temp_input8_group = {
2736         .attrs = &thermal_temp_input_attr[8]
2737 };
2738
2739 #undef THERMAL_SENSOR_ATTR_TEMP
2740 #undef THERMAL_ATTRS
2741
2742 /* --------------------------------------------------------------------- */
2743
2744 static int __init thermal_init(struct ibm_init_struct *iibm)
2745 {
2746         u8 t, ta1, ta2;
2747         int i;
2748         int acpi_tmp7;
2749         int res;
2750
2751         vdbg_printk(TPACPI_DBG_INIT, "initializing thermal subdriver\n");
2752
2753         acpi_tmp7 = acpi_evalf(ec_handle, NULL, "TMP7", "qv");
2754
2755         if (thinkpad_id.ec_model) {
2756                 /*
2757                  * Direct EC access mode: sensors at registers
2758                  * 0x78-0x7F, 0xC0-0xC7.  Registers return 0x00 for
2759                  * non-implemented, thermal sensors return 0x80 when
2760                  * not available
2761                  */
2762
2763                 ta1 = ta2 = 0;
2764                 for (i = 0; i < 8; i++) {
2765                         if (acpi_ec_read(TP_EC_THERMAL_TMP0 + i, &t)) {
2766                                 ta1 |= t;
2767                         } else {
2768                                 ta1 = 0;
2769                                 break;
2770                         }
2771                         if (acpi_ec_read(TP_EC_THERMAL_TMP8 + i, &t)) {
2772                                 ta2 |= t;
2773                         } else {
2774                                 ta1 = 0;
2775                                 break;
2776                         }
2777                 }
2778                 if (ta1 == 0) {
2779                         /* This is sheer paranoia, but we handle it anyway */
2780                         if (acpi_tmp7) {
2781                                 printk(IBM_ERR
2782                                        "ThinkPad ACPI EC access misbehaving, "
2783                                        "falling back to ACPI TMPx access mode\n");
2784                                 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
2785                         } else {
2786                                 printk(IBM_ERR
2787                                        "ThinkPad ACPI EC access misbehaving, "
2788                                        "disabling thermal sensors access\n");
2789                                 thermal_read_mode = TPACPI_THERMAL_NONE;
2790                         }
2791                 } else {
2792                         thermal_read_mode =
2793                             (ta2 != 0) ?
2794                             TPACPI_THERMAL_TPEC_16 : TPACPI_THERMAL_TPEC_8;
2795                 }
2796         } else if (acpi_tmp7) {
2797                 if (acpi_evalf(ec_handle, NULL, "UPDT", "qv")) {
2798                         /* 600e/x, 770e, 770x */
2799                         thermal_read_mode = TPACPI_THERMAL_ACPI_UPDT;
2800                 } else {
2801                         /* Standard ACPI TMPx access, max 8 sensors */
2802                         thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
2803                 }
2804         } else {
2805                 /* temperatures not supported on 570, G4x, R30, R31, R32 */
2806                 thermal_read_mode = TPACPI_THERMAL_NONE;
2807         }
2808
2809         vdbg_printk(TPACPI_DBG_INIT, "thermal is %s, mode %d\n",
2810                 str_supported(thermal_read_mode != TPACPI_THERMAL_NONE),
2811                 thermal_read_mode);
2812
2813         switch(thermal_read_mode) {
2814         case TPACPI_THERMAL_TPEC_16:
2815                 res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
2816                                 &thermal_temp_input16_group);
2817                 if (res)
2818                         return res;
2819                 break;
2820         case TPACPI_THERMAL_TPEC_8:
2821         case TPACPI_THERMAL_ACPI_TMP07:
2822         case TPACPI_THERMAL_ACPI_UPDT:
2823                 res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
2824                                 &thermal_temp_input8_group);
2825                 if (res)
2826                         return res;
2827                 break;
2828         case TPACPI_THERMAL_NONE:
2829         default:
2830                 return 1;
2831         }
2832
2833         return 0;
2834 }
2835
2836 static void thermal_exit(void)
2837 {
2838         switch(thermal_read_mode) {
2839         case TPACPI_THERMAL_TPEC_16:
2840                 sysfs_remove_group(&tpacpi_pdev->dev.kobj,
2841                                    &thermal_temp_input16_group);
2842                 break;
2843         case TPACPI_THERMAL_TPEC_8:
2844         case TPACPI_THERMAL_ACPI_TMP07:
2845         case TPACPI_THERMAL_ACPI_UPDT:
2846                 sysfs_remove_group(&tpacpi_pdev->dev.kobj,
2847                                    &thermal_temp_input16_group);
2848                 break;
2849         case TPACPI_THERMAL_NONE:
2850         default:
2851                 break;
2852         }
2853 }
2854
2855 /* idx is zero-based */
2856 static int thermal_get_sensor(int idx, s32 *value)
2857 {
2858         int t;
2859         s8 tmp;
2860         char tmpi[5];
2861
2862         t = TP_EC_THERMAL_TMP0;
2863
2864         switch (thermal_read_mode) {
2865 #if TPACPI_MAX_THERMAL_SENSORS >= 16
2866         case TPACPI_THERMAL_TPEC_16:
2867                 if (idx >= 8 && idx <= 15) {
2868                         t = TP_EC_THERMAL_TMP8;
2869                         idx -= 8;
2870                 }
2871                 /* fallthrough */
2872 #endif
2873         case TPACPI_THERMAL_TPEC_8:
2874                 if (idx <= 7) {
2875                         if (!acpi_ec_read(t + idx, &tmp))
2876                                 return -EIO;
2877                         *value = tmp * 1000;
2878                         return 0;
2879                 }
2880                 break;
2881
2882         case TPACPI_THERMAL_ACPI_UPDT:
2883                 if (idx <= 7) {
2884                         snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
2885                         if (!acpi_evalf(ec_handle, NULL, "UPDT", "v"))
2886                                 return -EIO;
2887                         if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
2888                                 return -EIO;
2889                         *value = (t - 2732) * 100;
2890                         return 0;
2891                 }
2892                 break;
2893
2894         case TPACPI_THERMAL_ACPI_TMP07:
2895                 if (idx <= 7) {
2896                         snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
2897                         if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
2898                                 return -EIO;
2899                         if (t > 127 || t < -127)
2900                                 t = TP_EC_THERMAL_TMP_NA;
2901                         *value = t * 1000;
2902                         return 0;
2903                 }
2904                 break;
2905
2906         case TPACPI_THERMAL_NONE:
2907         default:
2908                 return -ENOSYS;
2909         }
2910
2911         return -EINVAL;
2912 }
2913
2914 static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s)
2915 {
2916         int res, i;
2917         int n;
2918
2919         n = 8;
2920         i = 0;
2921
2922         if (!s)
2923                 return -EINVAL;
2924
2925         if (thermal_read_mode == TPACPI_THERMAL_TPEC_16)
2926                 n = 16;
2927
2928         for(i = 0 ; i < n; i++) {
2929                 res = thermal_get_sensor(i, &s->temp[i]);
2930                 if (res)
2931                         return res;
2932         }
2933
2934         return n;
2935 }
2936
2937 static int thermal_read(char *p)
2938 {
2939         int len = 0;
2940         int n, i;
2941         struct ibm_thermal_sensors_struct t;
2942
2943         n = thermal_get_sensors(&t);
2944         if (unlikely(n < 0))
2945                 return n;
2946
2947         len += sprintf(p + len, "temperatures:\t");
2948
2949         if (n > 0) {
2950                 for (i = 0; i < (n - 1); i++)
2951                         len += sprintf(p + len, "%d ", t.temp[i] / 1000);
2952                 len += sprintf(p + len, "%d\n", t.temp[i] / 1000);
2953         } else
2954                 len += sprintf(p + len, "not supported\n");
2955
2956         return len;
2957 }
2958
2959 static struct ibm_struct thermal_driver_data = {
2960         .name = "thermal",
2961         .read = thermal_read,
2962         .exit = thermal_exit,
2963 };
2964
2965 /*************************************************************************
2966  * EC Dump subdriver
2967  */
2968
2969 static u8 ecdump_regs[256];
2970
2971 static int ecdump_read(char *p)
2972 {
2973         int len = 0;
2974         int i, j;
2975         u8 v;
2976
2977         len += sprintf(p + len, "EC      "
2978                        " +00 +01 +02 +03 +04 +05 +06 +07"
2979                        " +08 +09 +0a +0b +0c +0d +0e +0f\n");
2980         for (i = 0; i < 256; i += 16) {
2981                 len += sprintf(p + len, "EC 0x%02x:", i);
2982                 for (j = 0; j < 16; j++) {
2983                         if (!acpi_ec_read(i + j, &v))
2984                                 break;
2985                         if (v != ecdump_regs[i + j])
2986                                 len += sprintf(p + len, " *%02x", v);
2987                         else
2988                                 len += sprintf(p + len, "  %02x", v);
2989                         ecdump_regs[i + j] = v;
2990                 }
2991                 len += sprintf(p + len, "\n");
2992                 if (j != 16)
2993                         break;
2994         }
2995
2996         /* These are way too dangerous to advertise openly... */
2997 #if 0
2998         len += sprintf(p + len, "commands:\t0x<offset> 0x<value>"
2999                        " (<offset> is 00-ff, <value> is 00-ff)\n");
3000         len += sprintf(p + len, "commands:\t0x<offset> <value>  "
3001                        " (<offset> is 00-ff, <value> is 0-255)\n");
3002 #endif
3003         return len;
3004 }
3005
3006 static int ecdump_write(char *buf)
3007 {
3008         char *cmd;
3009         int i, v;
3010
3011         while ((cmd = next_cmd(&buf))) {
3012                 if (sscanf(cmd, "0x%x 0x%x", &i, &v) == 2) {
3013                         /* i and v set */
3014                 } else if (sscanf(cmd, "0x%x %u", &i, &v) == 2) {
3015                         /* i and v set */
3016                 } else
3017                         return -EINVAL;
3018                 if (i >= 0 && i < 256 && v >= 0 && v < 256) {
3019                         if (!acpi_ec_write(i, v))
3020                                 return -EIO;
3021                 } else
3022                         return -EINVAL;
3023         }
3024
3025         return 0;
3026 }
3027
3028 static struct ibm_struct ecdump_driver_data = {
3029         .name = "ecdump",
3030         .read = ecdump_read,
3031         .write = ecdump_write,
3032         .flags.experimental = 1,
3033 };
3034
3035 /*************************************************************************
3036  * Backlight/brightness subdriver
3037  */
3038
3039 static struct backlight_device *ibm_backlight_device;
3040
3041 static struct backlight_ops ibm_backlight_data = {
3042         .get_brightness = brightness_get,
3043         .update_status  = brightness_update_status,
3044 };
3045
3046 static struct mutex brightness_mutex;
3047
3048 static int __init brightness_init(struct ibm_init_struct *iibm)
3049 {
3050         int b;
3051
3052         vdbg_printk(TPACPI_DBG_INIT, "initializing brightness subdriver\n");
3053
3054         mutex_init(&brightness_mutex);
3055
3056         if (!brightness_mode) {
3057                 if (thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO)
3058                         brightness_mode = 2;
3059                 else
3060                         brightness_mode = 3;
3061
3062                 dbg_printk(TPACPI_DBG_INIT, "selected brightness_mode=%d\n",
3063                         brightness_mode);
3064         }
3065
3066         if (brightness_mode > 3)
3067                 return -EINVAL;
3068
3069         b = brightness_get(NULL);
3070         if (b < 0)
3071                 return 1;
3072
3073         ibm_backlight_device = backlight_device_register(
3074                                         TPACPI_BACKLIGHT_DEV_NAME, NULL, NULL,
3075                                         &ibm_backlight_data);
3076         if (IS_ERR(ibm_backlight_device)) {
3077                 printk(IBM_ERR "Could not register backlight device\n");
3078                 return PTR_ERR(ibm_backlight_device);
3079         }
3080         vdbg_printk(TPACPI_DBG_INIT, "brightness is supported\n");
3081
3082         ibm_backlight_device->props.max_brightness = 7;
3083         ibm_backlight_device->props.brightness = b;
3084         backlight_update_status(ibm_backlight_device);
3085
3086         return 0;
3087 }
3088
3089 static void brightness_exit(void)
3090 {
3091         if (ibm_backlight_device) {
3092                 vdbg_printk(TPACPI_DBG_EXIT,
3093                             "calling backlight_device_unregister()\n");
3094                 backlight_device_unregister(ibm_backlight_device);
3095                 ibm_backlight_device = NULL;
3096         }
3097 }
3098
3099 static int brightness_update_status(struct backlight_device *bd)
3100 {
3101         return brightness_set(
3102                 (bd->props.fb_blank == FB_BLANK_UNBLANK &&
3103                  bd->props.power == FB_BLANK_UNBLANK) ?
3104                                 bd->props.brightness : 0);
3105 }
3106
3107 /*
3108  * ThinkPads can read brightness from two places: EC 0x31, or
3109  * CMOS NVRAM byte 0x5E, bits 0-3.
3110  */
3111 static int brightness_get(struct backlight_device *bd)
3112 {
3113         u8 lec = 0, lcmos = 0, level = 0;
3114
3115         if (brightness_mode & 1) {
3116                 if (!acpi_ec_read(brightness_offset, &lec))
3117                         return -EIO;
3118                 lec &= 7;
3119                 level = lec;
3120         };
3121         if (brightness_mode & 2) {
3122                 lcmos = (nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS)
3123                          & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
3124                         >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
3125                 level = lcmos;
3126         }
3127
3128         if (brightness_mode == 3 && lec != lcmos) {
3129                 printk(IBM_ERR
3130                         "CMOS NVRAM (%u) and EC (%u) do not agree "
3131                         "on display brightness level\n",
3132                         (unsigned int) lcmos,
3133                         (unsigned int) lec);
3134                 return -EIO;
3135         }
3136
3137         return level;
3138 }
3139
3140 static int brightness_set(int value)
3141 {
3142         int cmos_cmd, inc, i, res;
3143         int current_value;
3144
3145         if (value > 7)
3146                 return -EINVAL;
3147
3148         res = mutex_lock_interruptible(&brightness_mutex);
3149         if (res < 0)
3150                 return res;
3151
3152         current_value = brightness_get(NULL);
3153         if (current_value < 0) {
3154                 res = current_value;
3155                 goto errout;
3156         }
3157
3158         cmos_cmd = value > current_value ?
3159                         TP_CMOS_BRIGHTNESS_UP :
3160                         TP_CMOS_BRIGHTNESS_DOWN;
3161         inc = value > current_value ? 1 : -1;
3162
3163         res = 0;
3164         for (i = current_value; i != value; i += inc) {
3165                 if ((brightness_mode & 2) &&
3166                     issue_thinkpad_cmos_command(cmos_cmd)) {
3167                         res = -EIO;
3168                         goto errout;
3169                 }
3170                 if ((brightness_mode & 1) &&
3171                     !acpi_ec_write(brightness_offset, i + inc)) {
3172                         res = -EIO;
3173                         goto errout;;
3174                 }
3175         }
3176
3177 errout:
3178         mutex_unlock(&brightness_mutex);
3179         return res;
3180 }
3181
3182 static int brightness_read(char *p)
3183 {
3184         int len = 0;
3185         int level;
3186
3187         if ((level = brightness_get(NULL)) < 0) {
3188                 len += sprintf(p + len, "level:\t\tunreadable\n");
3189         } else {
3190                 len += sprintf(p + len, "level:\t\t%d\n", level & 0x7);
3191                 len += sprintf(p + len, "commands:\tup, down\n");
3192                 len += sprintf(p + len, "commands:\tlevel <level>"
3193                                " (<level> is 0-7)\n");
3194         }
3195
3196         return len;
3197 }
3198
3199 static int brightness_write(char *buf)
3200 {
3201         int level;
3202         int new_level;
3203         char *cmd;
3204
3205         while ((cmd = next_cmd(&buf))) {
3206                 if ((level = brightness_get(NULL)) < 0)
3207                         return level;
3208                 level &= 7;
3209
3210                 if (strlencmp(cmd, "up") == 0) {
3211                         new_level = level == 7 ? 7 : level + 1;
3212                 } else if (strlencmp(cmd, "down") == 0) {
3213                         new_level = level == 0 ? 0 : level - 1;
3214                 } else if (sscanf(cmd, "level %d", &new_level) == 1 &&
3215                            new_level >= 0 && new_level <= 7) {
3216                         /* new_level set */
3217                 } else
3218                         return -EINVAL;
3219
3220                 brightness_set(new_level);
3221         }
3222
3223         return 0;
3224 }
3225
3226 static struct ibm_struct brightness_driver_data = {
3227         .name = "brightness",
3228         .read = brightness_read,
3229         .write = brightness_write,
3230         .exit = brightness_exit,
3231 };
3232
3233 /*************************************************************************
3234  * Volume subdriver
3235  */
3236
3237 static int volume_read(char *p)
3238 {
3239         int len = 0;
3240         u8 level;
3241
3242         if (!acpi_ec_read(volume_offset, &level)) {
3243                 len += sprintf(p + len, "level:\t\tunreadable\n");
3244         } else {
3245                 len += sprintf(p + len, "level:\t\t%d\n", level & 0xf);
3246                 len += sprintf(p + len, "mute:\t\t%s\n", onoff(level, 6));
3247                 len += sprintf(p + len, "commands:\tup, down, mute\n");
3248                 len += sprintf(p + len, "commands:\tlevel <level>"
3249                                " (<level> is 0-15)\n");
3250         }
3251
3252         return len;
3253 }
3254
3255 static int volume_write(char *buf)
3256 {
3257         int cmos_cmd, inc, i;
3258         u8 level, mute;
3259         int new_level, new_mute;
3260         char *cmd;
3261
3262         while ((cmd = next_cmd(&buf))) {
3263                 if (!acpi_ec_read(volume_offset, &level))
3264                         return -EIO;
3265                 new_mute = mute = level & 0x40;
3266                 new_level = level = level & 0xf;
3267
3268                 if (strlencmp(cmd, "up") == 0) {
3269                         if (mute)
3270                                 new_mute = 0;
3271                         else
3272                                 new_level = level == 15 ? 15 : level + 1;
3273                 } else if (strlencmp(cmd, "down") == 0) {
3274                         if (mute)
3275                                 new_mute = 0;
3276                         else
3277                                 new_level = level == 0 ? 0 : level - 1;
3278                 } else if (sscanf(cmd, "level %d", &new_level) == 1 &&
3279                            new_level >= 0 && new_level <= 15) {
3280                         /* new_level set */
3281                 } else if (strlencmp(cmd, "mute") == 0) {
3282                         new_mute = 0x40;
3283                 } else
3284                         return -EINVAL;
3285
3286                 if (new_level != level) {       /* mute doesn't change */
3287                         cmos_cmd = new_level > level ? TP_CMOS_VOLUME_UP : TP_CMOS_VOLUME_DOWN;
3288                         inc = new_level > level ? 1 : -1;
3289
3290                         if (mute && (issue_thinkpad_cmos_command(cmos_cmd) ||
3291                                      !acpi_ec_write(volume_offset, level)))
3292                                 return -EIO;
3293
3294                         for (i = level; i != new_level; i += inc)
3295                                 if (issue_thinkpad_cmos_command(cmos_cmd) ||
3296                                     !acpi_ec_write(volume_offset, i + inc))
3297                                         return -EIO;
3298
3299                         if (mute && (issue_thinkpad_cmos_command(TP_CMOS_VOLUME_MUTE) ||
3300                                      !acpi_ec_write(volume_offset,
3301                                                     new_level + mute)))
3302                                 return -EIO;
3303                 }
3304
3305                 if (new_mute != mute) { /* level doesn't change */
3306                         cmos_cmd = new_mute ? TP_CMOS_VOLUME_MUTE : TP_CMOS_VOLUME_UP;
3307
3308                         if (issue_thinkpad_cmos_command(cmos_cmd) ||
3309                             !acpi_ec_write(volume_offset, level + new_mute))
3310                                 return -EIO;
3311                 }
3312         }
3313
3314         return 0;
3315 }
3316
3317 static struct ibm_struct volume_driver_data = {
3318         .name = "volume",
3319         .read = volume_read,
3320         .write = volume_write,
3321 };
3322
3323 /*************************************************************************
3324  * Fan subdriver
3325  */
3326
3327 /*
3328  * FAN ACCESS MODES
3329  *
3330  * TPACPI_FAN_RD_ACPI_GFAN:
3331  *      ACPI GFAN method: returns fan level
3332  *
3333  *      see TPACPI_FAN_WR_ACPI_SFAN
3334  *      EC 0x2f (HFSP) not available if GFAN exists
3335  *
3336  * TPACPI_FAN_WR_ACPI_SFAN:
3337  *      ACPI SFAN method: sets fan level, 0 (stop) to 7 (max)
3338  *
3339  *      EC 0x2f (HFSP) might be available *for reading*, but do not use
3340  *      it for writing.
3341  *
3342  * TPACPI_FAN_WR_TPEC:
3343  *      ThinkPad EC register 0x2f (HFSP): fan control loop mode
3344  *      Supported on almost all ThinkPads
3345  *
3346  *      Fan speed changes of any sort (including those caused by the
3347  *      disengaged mode) are usually done slowly by the firmware as the
3348  *      maximum ammount of fan duty cycle change per second seems to be
3349  *      limited.
3350  *
3351  *      Reading is not available if GFAN exists.
3352  *      Writing is not available if SFAN exists.
3353  *
3354  *      Bits
3355  *       7      automatic mode engaged;
3356  *              (default operation mode of the ThinkPad)
3357  *              fan level is ignored in this mode.
3358  *       6      full speed mode (takes precedence over bit 7);
3359  *              not available on all thinkpads.  May disable
3360  *              the tachometer while the fan controller ramps up
3361  *              the speed (which can take up to a few *minutes*).
3362  *              Speeds up fan to 100% duty-cycle, which is far above
3363  *              the standard RPM levels.  It is not impossible that
3364  *              it could cause hardware damage.
3365  *      5-3     unused in some models.  Extra bits for fan level
3366  *              in others, but still useless as all values above
3367  *              7 map to the same speed as level 7 in these models.
3368  *      2-0     fan level (0..7 usually)
3369  *                      0x00 = stop
3370  *                      0x07 = max (set when temperatures critical)
3371  *              Some ThinkPads may have other levels, see
3372  *              TPACPI_FAN_WR_ACPI_FANS (X31/X40/X41)
3373  *
3374  *      FIRMWARE BUG: on some models, EC 0x2f might not be initialized at
3375  *      boot. Apparently the EC does not intialize it, so unless ACPI DSDT
3376  *      does so, its initial value is meaningless (0x07).
3377  *
3378  *      For firmware bugs, refer to:
3379  *      http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
3380  *
3381  *      ----
3382  *
3383  *      ThinkPad EC register 0x84 (LSB), 0x85 (MSB):
3384  *      Main fan tachometer reading (in RPM)
3385  *
3386  *      This register is present on all ThinkPads with a new-style EC, and
3387  *      it is known not to be present on the A21m/e, and T22, as there is
3388  *      something else in offset 0x84 according to the ACPI DSDT.  Other
3389  *      ThinkPads from this same time period (and earlier) probably lack the
3390  *      tachometer as well.
3391  *
3392  *      Unfortunately a lot of ThinkPads with new-style ECs but whose firwmare
3393  *      was never fixed by IBM to report the EC firmware version string
3394  *      probably support the tachometer (like the early X models), so
3395  *      detecting it is quite hard.  We need more data to know for sure.
3396  *
3397  *      FIRMWARE BUG: always read 0x84 first, otherwise incorrect readings
3398  *      might result.
3399  *
3400  *      FIRMWARE BUG: may go stale while the EC is switching to full speed
3401  *      mode.
3402  *
3403  *      For firmware bugs, refer to:
3404  *      http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
3405  *
3406  * TPACPI_FAN_WR_ACPI_FANS:
3407  *      ThinkPad X31, X40, X41.  Not available in the X60.
3408  *
3409  *      FANS ACPI handle: takes three arguments: low speed, medium speed,
3410  *      high speed.  ACPI DSDT seems to map these three speeds to levels
3411  *      as follows: STOP LOW LOW MED MED HIGH HIGH HIGH HIGH
3412  *      (this map is stored on FAN0..FAN8 as "0,1,1,2,2,3,3,3,3")
3413  *
3414  *      The speeds are stored on handles
3415  *      (FANA:FAN9), (FANC:FANB), (FANE:FAND).
3416  *
3417  *      There are three default speed sets, acessible as handles:
3418  *      FS1L,FS1M,FS1H; FS2L,FS2M,FS2H; FS3L,FS3M,FS3H
3419  *
3420  *      ACPI DSDT switches which set is in use depending on various
3421  *      factors.
3422  *
3423  *      TPACPI_FAN_WR_TPEC is also available and should be used to
3424  *      command the fan.  The X31/X40/X41 seems to have 8 fan levels,
3425  *      but the ACPI tables just mention level 7.
3426  */
3427
3428 static enum fan_status_access_mode fan_status_access_mode;
3429 static enum fan_control_access_mode fan_control_access_mode;
3430 static enum fan_control_commands fan_control_commands;
3431
3432 static u8 fan_control_initial_status;
3433 static u8 fan_control_desired_level;
3434
3435 static void fan_watchdog_fire(struct work_struct *ignored);
3436 static int fan_watchdog_maxinterval;
3437 static DECLARE_DELAYED_WORK(fan_watchdog_task, fan_watchdog_fire);
3438
3439 IBM_HANDLE(fans, ec, "FANS");   /* X31, X40, X41 */
3440 IBM_HANDLE(gfan, ec, "GFAN",    /* 570 */
3441            "\\FSPD",            /* 600e/x, 770e, 770x */
3442            );                   /* all others */
3443 IBM_HANDLE(sfan, ec, "SFAN",    /* 570 */
3444            "JFNS",              /* 770x-JL */
3445            );                   /* all others */
3446
3447 /*
3448  * SYSFS fan layout: hwmon compatible (device)
3449  *
3450  * pwm*_enable:
3451  *      0: "disengaged" mode
3452  *      1: manual mode
3453  *      2: native EC "auto" mode (recommended, hardware default)
3454  *
3455  * pwm*: set speed in manual mode, ignored otherwise.
3456  *      0 is level 0; 255 is level 7. Intermediate points done with linear
3457  *      interpolation.
3458  *
3459  * fan*_input: tachometer reading, RPM
3460  *
3461  *
3462  * SYSFS fan layout: extensions
3463  *
3464  * fan_watchdog (driver):
3465  *      fan watchdog interval in seconds, 0 disables (default), max 120
3466  */
3467
3468 /* sysfs fan pwm1_enable ----------------------------------------------- */
3469 static ssize_t fan_pwm1_enable_show(struct device *dev,
3470                                     struct device_attribute *attr,
3471                                     char *buf)
3472 {
3473         int res, mode;
3474         u8 status;
3475
3476         res = fan_get_status_safe(&status);
3477         if (res)
3478                 return res;
3479
3480         if (unlikely(tp_features.fan_ctrl_status_undef)) {
3481                 if (status != fan_control_initial_status) {
3482                         tp_features.fan_ctrl_status_undef = 0;
3483                 } else {
3484                         /* Return most likely status. In fact, it
3485                          * might be the only possible status */
3486                         status = TP_EC_FAN_AUTO;
3487                 }
3488         }
3489
3490         if (status & TP_EC_FAN_FULLSPEED) {
3491                 mode = 0;
3492         } else if (status & TP_EC_FAN_AUTO) {
3493                 mode = 2;
3494         } else
3495                 mode = 1;
3496
3497         return snprintf(buf, PAGE_SIZE, "%d\n", mode);
3498 }
3499
3500 static ssize_t fan_pwm1_enable_store(struct device *dev,
3501                                      struct device_attribute *attr,
3502                                      const char *buf, size_t count)
3503 {
3504         unsigned long t;
3505         int res, level;
3506
3507         if (parse_strtoul(buf, 2, &t))
3508                 return -EINVAL;
3509
3510         switch (t) {
3511         case 0:
3512                 level = TP_EC_FAN_FULLSPEED;
3513                 break;
3514         case 1:
3515                 level = TPACPI_FAN_LAST_LEVEL;
3516                 break;
3517         case 2:
3518                 level = TP_EC_FAN_AUTO;
3519                 break;
3520         case 3:
3521                 /* reserved for software-controlled auto mode */
3522                 return -ENOSYS;
3523         default:
3524                 return -EINVAL;
3525         }
3526
3527         res = fan_set_level_safe(level);
3528         if (res == -ENXIO)
3529                 return -EINVAL;
3530         else if (res < 0)
3531                 return res;
3532
3533         fan_watchdog_reset();
3534
3535         return count;
3536 }
3537
3538 static struct device_attribute dev_attr_fan_pwm1_enable =
3539         __ATTR(pwm1_enable, S_IWUSR | S_IRUGO,
3540                 fan_pwm1_enable_show, fan_pwm1_enable_store);
3541
3542 /* sysfs fan pwm1 ------------------------------------------------------ */
3543 static ssize_t fan_pwm1_show(struct device *dev,
3544                              struct device_attribute *attr,
3545                              char *buf)
3546 {
3547         int res;
3548         u8 status;
3549
3550         res = fan_get_status_safe(&status);
3551         if (res)
3552                 return res;
3553
3554         if (unlikely(tp_features.fan_ctrl_status_undef)) {
3555                 if (status != fan_control_initial_status) {
3556                         tp_features.fan_ctrl_status_undef = 0;
3557                 } else {
3558                         status = TP_EC_FAN_AUTO;
3559                 }
3560         }
3561
3562         if ((status &
3563              (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) != 0)
3564                 status = fan_control_desired_level;
3565
3566         if (status > 7)
3567                 status = 7;
3568
3569         return snprintf(buf, PAGE_SIZE, "%u\n", (status * 255) / 7);
3570 }
3571
3572 static ssize_t fan_pwm1_store(struct device *dev,
3573                               struct device_attribute *attr,
3574                               const char *buf, size_t count)
3575 {
3576         unsigned long s;
3577         int rc;
3578         u8 status, newlevel;
3579
3580         if (parse_strtoul(buf, 255, &s))
3581                 return -EINVAL;
3582
3583         /* scale down from 0-255 to 0-7 */
3584         newlevel = (s >> 5) & 0x07;
3585
3586         rc = mutex_lock_interruptible(&fan_mutex);
3587         if (rc < 0)
3588                 return rc;
3589
3590         rc = fan_get_status(&status);
3591         if (!rc && (status &
3592                     (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
3593                 rc = fan_set_level(newlevel);
3594                 if (rc == -ENXIO)
3595                         rc = -EINVAL;
3596                 else if (!rc) {
3597                         fan_update_desired_level(newlevel);
3598                         fan_watchdog_reset();
3599                 }
3600         }
3601
3602         mutex_unlock(&fan_mutex);
3603         return (rc)? rc : count;
3604 }
3605
3606 static struct device_attribute dev_attr_fan_pwm1 =
3607         __ATTR(pwm1, S_IWUSR | S_IRUGO,
3608                 fan_pwm1_show, fan_pwm1_store);
3609
3610 /* sysfs fan fan1_input ------------------------------------------------ */
3611 static ssize_t fan_fan1_input_show(struct device *dev,
3612                            struct device_attribute *attr,
3613                            char *buf)
3614 {
3615         int res;
3616         unsigned int speed;
3617
3618         res = fan_get_speed(&speed);
3619         if (res < 0)
3620                 return res;
3621
3622         return snprintf(buf, PAGE_SIZE, "%u\n", speed);
3623 }
3624
3625 static struct device_attribute dev_attr_fan_fan1_input =
3626         __ATTR(fan1_input, S_IRUGO,
3627                 fan_fan1_input_show, NULL);
3628
3629 /* sysfs fan fan_watchdog (driver) ------------------------------------- */
3630 static ssize_t fan_fan_watchdog_show(struct device_driver *drv,
3631                                      char *buf)
3632 {
3633         return snprintf(buf, PAGE_SIZE, "%u\n", fan_watchdog_maxinterval);
3634 }
3635
3636 static ssize_t fan_fan_watchdog_store(struct device_driver *drv,
3637                                       const char *buf, size_t count)
3638 {
3639         unsigned long t;
3640
3641         if (parse_strtoul(buf, 120, &t))
3642                 return -EINVAL;
3643
3644         if (!fan_control_allowed)
3645                 return -EPERM;
3646
3647         fan_watchdog_maxinterval = t;
3648         fan_watchdog_reset();
3649
3650         return count;
3651 }
3652
3653 static DRIVER_ATTR(fan_watchdog, S_IWUSR | S_IRUGO,
3654                 fan_fan_watchdog_show, fan_fan_watchdog_store);
3655
3656 /* --------------------------------------------------------------------- */
3657 static struct attribute *fan_attributes[] = {
3658         &dev_attr_fan_pwm1_enable.attr, &dev_attr_fan_pwm1.attr,
3659         &dev_attr_fan_fan1_input.attr,
3660         NULL
3661 };
3662
3663 static const struct attribute_group fan_attr_group = {
3664         .attrs = fan_attributes,
3665 };
3666
3667 static int __init fan_init(struct ibm_init_struct *iibm)
3668 {
3669         int rc;
3670
3671         vdbg_printk(TPACPI_DBG_INIT, "initializing fan subdriver\n");
3672
3673         mutex_init(&fan_mutex);
3674         fan_status_access_mode = TPACPI_FAN_NONE;
3675         fan_control_access_mode = TPACPI_FAN_WR_NONE;
3676         fan_control_commands = 0;
3677         fan_watchdog_maxinterval = 0;
3678         tp_features.fan_ctrl_status_undef = 0;
3679         fan_control_desired_level = 7;
3680
3681         IBM_ACPIHANDLE_INIT(fans);
3682         IBM_ACPIHANDLE_INIT(gfan);
3683         IBM_ACPIHANDLE_INIT(sfan);
3684
3685         if (gfan_handle) {
3686                 /* 570, 600e/x, 770e, 770x */
3687                 fan_status_access_mode = TPACPI_FAN_RD_ACPI_GFAN;
3688         } else {
3689                 /* all other ThinkPads: note that even old-style
3690                  * ThinkPad ECs supports the fan control register */
3691                 if (likely(acpi_ec_read(fan_status_offset,
3692                                         &fan_control_initial_status))) {
3693                         fan_status_access_mode = TPACPI_FAN_RD_TPEC;
3694
3695                         /* In some ThinkPads, neither the EC nor the ACPI
3696                          * DSDT initialize the fan status, and it ends up
3697                          * being set to 0x07 when it *could* be either
3698                          * 0x07 or 0x80.
3699                          *
3700                          * Enable for TP-1Y (T43), TP-78 (R51e),
3701                          * TP-76 (R52), TP-70 (T43, R52), which are known
3702                          * to be buggy. */
3703                         if (fan_control_initial_status == 0x07) {
3704                                 switch (thinkpad_id.ec_model) {
3705                                 case 0x5931: /* TP-1Y */
3706                                 case 0x3837: /* TP-78 */
3707                                 case 0x3637: /* TP-76 */
3708                                 case 0x3037: /* TP-70 */
3709                                         printk(IBM_NOTICE
3710                                                "fan_init: initial fan status is "
3711                                                "unknown, assuming it is in auto "
3712                                                "mode\n");
3713                                         tp_features.fan_ctrl_status_undef = 1;
3714                                         ;;
3715                                 }
3716                         }
3717                 } else {
3718                         printk(IBM_ERR
3719                                "ThinkPad ACPI EC access misbehaving, "
3720                                "fan status and control unavailable\n");
3721                         return 1;
3722                 }
3723         }
3724
3725         if (sfan_handle) {
3726                 /* 570, 770x-JL */
3727                 fan_control_access_mode = TPACPI_FAN_WR_ACPI_SFAN;
3728                 fan_control_commands |=
3729                     TPACPI_FAN_CMD_LEVEL | TPACPI_FAN_CMD_ENABLE;
3730         } else {
3731                 if (!gfan_handle) {
3732                         /* gfan without sfan means no fan control */
3733                         /* all other models implement TP EC 0x2f control */
3734
3735                         if (fans_handle) {
3736                                 /* X31, X40, X41 */
3737                                 fan_control_access_mode =
3738                                     TPACPI_FAN_WR_ACPI_FANS;
3739                                 fan_control_commands |=
3740                                     TPACPI_FAN_CMD_SPEED |
3741                                     TPACPI_FAN_CMD_LEVEL |
3742                                     TPACPI_FAN_CMD_ENABLE;
3743                         } else {
3744                                 fan_control_access_mode = TPACPI_FAN_WR_TPEC;
3745                                 fan_control_commands |=
3746                                     TPACPI_FAN_CMD_LEVEL |
3747                                     TPACPI_FAN_CMD_ENABLE;
3748                         }
3749                 }
3750         }
3751
3752         vdbg_printk(TPACPI_DBG_INIT, "fan is %s, modes %d, %d\n",
3753                 str_supported(fan_status_access_mode != TPACPI_FAN_NONE ||
3754                   fan_control_access_mode != TPACPI_FAN_WR_NONE),
3755                 fan_status_access_mode, fan_control_access_mode);
3756
3757         /* fan control master switch */
3758         if (!fan_control_allowed) {
3759                 fan_control_access_mode = TPACPI_FAN_WR_NONE;
3760                 fan_control_commands = 0;
3761                 dbg_printk(TPACPI_DBG_INIT,
3762                            "fan control features disabled by parameter\n");
3763         }
3764
3765         /* update fan_control_desired_level */
3766         if (fan_status_access_mode != TPACPI_FAN_NONE)
3767                 fan_get_status_safe(NULL);
3768
3769         if (fan_status_access_mode != TPACPI_FAN_NONE ||
3770             fan_control_access_mode != TPACPI_FAN_WR_NONE) {
3771                 rc = sysfs_create_group(&tpacpi_pdev->dev.kobj,
3772                                          &fan_attr_group);
3773                 if (!(rc < 0))
3774                         rc = driver_create_file(&tpacpi_pdriver.driver,
3775                                         &driver_attr_fan_watchdog);
3776                 if (rc < 0)
3777                         return rc;
3778                 return 0;
3779         } else
3780                 return 1;
3781 }
3782
3783 /*
3784  * Call with fan_mutex held
3785  */
3786 static void fan_update_desired_level(u8 status)
3787 {
3788         if ((status &
3789              (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
3790                 if (status > 7)
3791                         fan_control_desired_level = 7;
3792                 else
3793                         fan_control_desired_level = status;
3794         }
3795 }
3796
3797 static int fan_get_status(u8 *status)
3798 {
3799         u8 s;
3800
3801         /* TODO:
3802          * Add TPACPI_FAN_RD_ACPI_FANS ? */
3803
3804         switch (fan_status_access_mode) {
3805         case TPACPI_FAN_RD_ACPI_GFAN:
3806                 /* 570, 600e/x, 770e, 770x */
3807
3808                 if (unlikely(!acpi_evalf(gfan_handle, &s, NULL, "d")))
3809                         return -EIO;
3810
3811                 if (likely(status))
3812                         *status = s & 0x07;
3813
3814                 break;
3815
3816         case TPACPI_FAN_RD_TPEC:
3817                 /* all except 570, 600e/x, 770e, 770x */
3818                 if (unlikely(!acpi_ec_read(fan_status_offset, &s)))
3819                         return -EIO;
3820
3821                 if (likely(status))
3822                         *status = s;
3823
3824                 break;
3825
3826         default:
3827                 return -ENXIO;
3828         }
3829
3830         return 0;
3831 }
3832
3833 static int fan_get_status_safe(u8 *status)
3834 {
3835         int rc;
3836         u8 s;
3837
3838         rc = mutex_lock_interruptible(&fan_mutex);
3839         if (rc < 0)
3840                 return rc;
3841         rc = fan_get_status(&s);
3842         if (!rc)
3843                 fan_update_desired_level(s);
3844         mutex_unlock(&fan_mutex);
3845
3846         if (status)
3847                 *status = s;
3848
3849         return rc;
3850 }
3851
3852 static void fan_exit(void)
3853 {
3854         vdbg_printk(TPACPI_DBG_EXIT, "cancelling any pending fan watchdog tasks\n");
3855
3856         /* FIXME: can we really do this unconditionally? */
3857         sysfs_remove_group(&tpacpi_pdev->dev.kobj, &fan_attr_group);
3858         driver_remove_file(&tpacpi_pdriver.driver, &driver_attr_fan_watchdog);
3859
3860         cancel_delayed_work(&fan_watchdog_task);
3861         flush_scheduled_work();
3862 }
3863
3864 static int fan_get_speed(unsigned int *speed)
3865 {
3866         u8 hi, lo;
3867
3868         switch (fan_status_access_mode) {
3869         case TPACPI_FAN_RD_TPEC:
3870                 /* all except 570, 600e/x, 770e, 770x */
3871                 if (unlikely(!acpi_ec_read(fan_rpm_offset, &lo) ||
3872                              !acpi_ec_read(fan_rpm_offset + 1, &hi)))
3873                         return -EIO;
3874
3875                 if (likely(speed))
3876                         *speed = (hi << 8) | lo;
3877
3878                 break;
3879
3880         default:
3881                 return -ENXIO;
3882         }
3883
3884         return 0;
3885 }
3886
3887 static void fan_watchdog_fire(struct work_struct *ignored)
3888 {
3889         int rc;
3890
3891         printk(IBM_NOTICE "fan watchdog: enabling fan\n");
3892         rc = fan_set_enable();
3893         if (rc < 0) {
3894                 printk(IBM_ERR "fan watchdog: error %d while enabling fan, "
3895                         "will try again later...\n", -rc);
3896                 /* reschedule for later */
3897                 fan_watchdog_reset();
3898         }
3899 }
3900
3901 static void fan_watchdog_reset(void)
3902 {
3903         static int fan_watchdog_active;
3904
3905         if (fan_control_access_mode == TPACPI_FAN_WR_NONE)
3906                 return;
3907
3908         if (fan_watchdog_active)
3909                 cancel_delayed_work(&fan_watchdog_task);
3910
3911         if (fan_watchdog_maxinterval > 0) {
3912                 fan_watchdog_active = 1;
3913                 if (!schedule_delayed_work(&fan_watchdog_task,
3914                                 msecs_to_jiffies(fan_watchdog_maxinterval
3915                                                  * 1000))) {
3916                         printk(IBM_ERR "failed to schedule the fan watchdog, "
3917                                "watchdog will not trigger\n");
3918                 }
3919         } else
3920                 fan_watchdog_active = 0;
3921 }
3922
3923 static int fan_set_level(int level)
3924 {
3925         if (!fan_control_allowed)
3926                 return -EPERM;
3927
3928         switch (fan_control_access_mode) {
3929         case TPACPI_FAN_WR_ACPI_SFAN:
3930                 if (level >= 0 && level <= 7) {
3931                         if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", level))
3932                                 return -EIO;
3933                 } else
3934                         return -EINVAL;
3935                 break;
3936
3937         case TPACPI_FAN_WR_ACPI_FANS:
3938         case TPACPI_FAN_WR_TPEC:
3939                 if ((level != TP_EC_FAN_AUTO) &&
3940                     (level != TP_EC_FAN_FULLSPEED) &&
3941                     ((level < 0) || (level > 7)))
3942                         return -EINVAL;
3943
3944                 /* safety net should the EC not support AUTO
3945                  * or FULLSPEED mode bits and just ignore them */
3946                 if (level & TP_EC_FAN_FULLSPEED)
3947                         level |= 7;     /* safety min speed 7 */
3948                 else if (level & TP_EC_FAN_FULLSPEED)
3949                         level |= 4;     /* safety min speed 4 */
3950
3951                 if (!acpi_ec_write(fan_status_offset, level))
3952                         return -EIO;
3953                 else
3954                         tp_features.fan_ctrl_status_undef = 0;
3955                 break;
3956
3957         default:
3958                 return -ENXIO;
3959         }
3960         return 0;
3961 }
3962
3963 static int fan_set_level_safe(int level)
3964 {
3965         int rc;
3966
3967         if (!fan_control_allowed)
3968                 return -EPERM;
3969
3970         rc = mutex_lock_interruptible(&fan_mutex);
3971         if (rc < 0)
3972                 return rc;
3973
3974         if (level == TPACPI_FAN_LAST_LEVEL)
3975                 level = fan_control_desired_level;
3976
3977         rc = fan_set_level(level);
3978         if (!rc)
3979                 fan_update_desired_level(level);
3980
3981         mutex_unlock(&fan_mutex);
3982         return rc;
3983 }
3984
3985 static int fan_set_enable(void)
3986 {
3987         u8 s;
3988         int rc;
3989
3990         if (!fan_control_allowed)
3991                 return -EPERM;
3992
3993         rc = mutex_lock_interruptible(&fan_mutex);
3994         if (rc < 0)
3995                 return rc;
3996
3997         switch (fan_control_access_mode) {
3998         case TPACPI_FAN_WR_ACPI_FANS:
3999         case TPACPI_FAN_WR_TPEC:
4000                 rc = fan_get_status(&s);
4001                 if (rc < 0)
4002                         break;
4003
4004                 /* Don't go out of emergency fan mode */
4005                 if (s != 7) {
4006                         s &= 0x07;
4007                         s |= TP_EC_FAN_AUTO | 4; /* min fan speed 4 */
4008                 }
4009
4010                 if (!acpi_ec_write(fan_status_offset, s))
4011                         rc = -EIO;
4012                 else {
4013                         tp_features.fan_ctrl_status_undef = 0;
4014                         rc = 0;
4015                 }
4016                 break;
4017
4018         case TPACPI_FAN_WR_ACPI_SFAN:
4019                 rc = fan_get_status(&s);
4020                 if (rc < 0)
4021                         break;
4022
4023                 s &= 0x07;
4024
4025                 /* Set fan to at least level 4 */
4026                 s |= 4;
4027
4028                 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", s))
4029                         rc= -EIO;
4030                 else
4031                         rc = 0;
4032                 break;
4033
4034         default:
4035                 rc = -ENXIO;
4036         }
4037
4038         mutex_unlock(&fan_mutex);
4039         return rc;
4040 }
4041
4042 static int fan_set_disable(void)
4043 {
4044         int rc;
4045
4046         if (!fan_control_allowed)
4047                 return -EPERM;
4048
4049         rc = mutex_lock_interruptible(&fan_mutex);
4050         if (rc < 0)
4051                 return rc;
4052
4053         rc = 0;
4054         switch (fan_control_access_mode) {
4055         case TPACPI_FAN_WR_ACPI_FANS:
4056         case TPACPI_FAN_WR_TPEC:
4057                 if (!acpi_ec_write(fan_status_offset, 0x00))
4058                         rc = -EIO;
4059                 else {
4060                         fan_control_desired_level = 0;
4061                         tp_features.fan_ctrl_status_undef = 0;
4062                 }
4063                 break;
4064
4065         case TPACPI_FAN_WR_ACPI_SFAN:
4066                 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", 0x00))
4067                         rc = -EIO;
4068                 else
4069                         fan_control_desired_level = 0;
4070                 break;
4071
4072         default:
4073                 rc = -ENXIO;
4074         }
4075
4076
4077         mutex_unlock(&fan_mutex);
4078         return rc;
4079 }
4080
4081 static int fan_set_speed(int speed)
4082 {
4083         int rc;
4084
4085         if (!fan_control_allowed)
4086                 return -EPERM;
4087
4088         rc = mutex_lock_interruptible(&fan_mutex);
4089         if (rc < 0)
4090                 return rc;
4091
4092         rc = 0;
4093         switch (fan_control_access_mode) {
4094         case TPACPI_FAN_WR_ACPI_FANS:
4095                 if (speed >= 0 && speed <= 65535) {
4096                         if (!acpi_evalf(fans_handle, NULL, NULL, "vddd",
4097                                         speed, speed, speed))
4098                                 rc = -EIO;
4099                 } else
4100                         rc = -EINVAL;
4101                 break;
4102
4103         default:
4104                 rc = -ENXIO;
4105         }
4106
4107         mutex_unlock(&fan_mutex);
4108         return rc;
4109 }
4110
4111 static int fan_read(char *p)
4112 {
4113         int len = 0;
4114         int rc;
4115         u8 status;
4116         unsigned int speed = 0;
4117
4118         switch (fan_status_access_mode) {
4119         case TPACPI_FAN_RD_ACPI_GFAN:
4120                 /* 570, 600e/x, 770e, 770x */
4121                 if ((rc = fan_get_status_safe(&status)) < 0)
4122                         return rc;
4123
4124                 len += sprintf(p + len, "status:\t\t%s\n"
4125                                "level:\t\t%d\n",
4126                                (status != 0) ? "enabled" : "disabled", status);
4127                 break;
4128
4129         case TPACPI_FAN_RD_TPEC:
4130                 /* all except 570, 600e/x, 770e, 770x */
4131                 if ((rc = fan_get_status_safe(&status)) < 0)
4132                         return rc;
4133
4134                 if (unlikely(tp_features.fan_ctrl_status_undef)) {
4135                         if (status != fan_control_initial_status)
4136                                 tp_features.fan_ctrl_status_undef = 0;
4137                         else
4138                                 /* Return most likely status. In fact, it
4139                                  * might be the only possible status */
4140                                 status = TP_EC_FAN_AUTO;
4141                 }
4142
4143                 len += sprintf(p + len, "status:\t\t%s\n",
4144                                (status != 0) ? "enabled" : "disabled");
4145
4146                 if ((rc = fan_get_speed(&speed)) < 0)
4147                         return rc;
4148
4149                 len += sprintf(p + len, "speed:\t\t%d\n", speed);
4150
4151                 if (status & TP_EC_FAN_FULLSPEED)
4152                         /* Disengaged mode takes precedence */
4153                         len += sprintf(p + len, "level:\t\tdisengaged\n");
4154                 else if (status & TP_EC_FAN_AUTO)
4155                         len += sprintf(p + len, "level:\t\tauto\n");
4156                 else
4157                         len += sprintf(p + len, "level:\t\t%d\n", status);
4158                 break;
4159
4160         case TPACPI_FAN_NONE:
4161         default:
4162                 len += sprintf(p + len, "status:\t\tnot supported\n");
4163         }
4164
4165         if (fan_control_commands & TPACPI_FAN_CMD_LEVEL) {
4166                 len += sprintf(p + len, "commands:\tlevel <level>");
4167
4168                 switch (fan_control_access_mode) {
4169                 case TPACPI_FAN_WR_ACPI_SFAN:
4170                         len += sprintf(p + len, " (<level> is 0-7)\n");
4171                         break;
4172
4173                 default:
4174                         len += sprintf(p + len, " (<level> is 0-7, "
4175                                        "auto, disengaged, full-speed)\n");
4176                         break;
4177                 }
4178         }
4179
4180         if (fan_control_commands & TPACPI_FAN_CMD_ENABLE)
4181                 len += sprintf(p + len, "commands:\tenable, disable\n"
4182                                "commands:\twatchdog <timeout> (<timeout> is 0 (off), "
4183                                "1-120 (seconds))\n");
4184
4185         if (fan_control_commands & TPACPI_FAN_CMD_SPEED)
4186                 len += sprintf(p + len, "commands:\tspeed <speed>"
4187                                " (<speed> is 0-65535)\n");
4188
4189         return len;
4190 }
4191
4192 static int fan_write_cmd_level(const char *cmd, int *rc)
4193 {
4194         int level;
4195
4196         if (strlencmp(cmd, "level auto") == 0)
4197                 level = TP_EC_FAN_AUTO;
4198         else if ((strlencmp(cmd, "level disengaged") == 0) |
4199                  (strlencmp(cmd, "level full-speed") == 0))
4200                 level = TP_EC_FAN_FULLSPEED;
4201         else if (sscanf(cmd, "level %d", &level) != 1)
4202                 return 0;
4203
4204         if ((*rc = fan_set_level_safe(level)) == -ENXIO)
4205                 printk(IBM_ERR "level command accepted for unsupported "
4206                        "access mode %d", fan_control_access_mode);
4207
4208         return 1;
4209 }
4210
4211 static int fan_write_cmd_enable(const char *cmd, int *rc)
4212 {
4213         if (strlencmp(cmd, "enable") != 0)
4214                 return 0;
4215
4216         if ((*rc = fan_set_enable()) == -ENXIO)
4217                 printk(IBM_ERR "enable command accepted for unsupported "
4218                        "access mode %d", fan_control_access_mode);
4219
4220         return 1;
4221 }
4222
4223 static int fan_write_cmd_disable(const char *cmd, int *rc)
4224 {
4225         if (strlencmp(cmd, "disable") != 0)
4226                 return 0;
4227
4228         if ((*rc = fan_set_disable()) == -ENXIO)
4229                 printk(IBM_ERR "disable command accepted for unsupported "
4230                        "access mode %d", fan_control_access_mode);
4231
4232         return 1;
4233 }
4234
4235 static int fan_write_cmd_speed(const char *cmd, int *rc)
4236 {
4237         int speed;
4238
4239         /* TODO:
4240          * Support speed <low> <medium> <high> ? */
4241
4242         if (sscanf(cmd, "speed %d", &speed) != 1)
4243                 return 0;
4244
4245         if ((*rc = fan_set_speed(speed)) == -ENXIO)
4246                 printk(IBM_ERR "speed command accepted for unsupported "
4247                        "access mode %d", fan_control_access_mode);
4248
4249         return 1;
4250 }
4251
4252 static int fan_write_cmd_watchdog(const char *cmd, int *rc)
4253 {
4254         int interval;
4255
4256         if (sscanf(cmd, "watchdog %d", &interval) != 1)
4257                 return 0;
4258
4259         if (interval < 0 || interval > 120)
4260                 *rc = -EINVAL;
4261         else
4262                 fan_watchdog_maxinterval = interval;
4263
4264         return 1;
4265 }
4266
4267 static int fan_write(char *buf)
4268 {
4269         char *cmd;
4270         int rc = 0;
4271
4272         while (!rc && (cmd = next_cmd(&buf))) {
4273                 if (!((fan_control_commands & TPACPI_FAN_CMD_LEVEL) &&
4274                       fan_write_cmd_level(cmd, &rc)) &&
4275                     !((fan_control_commands & TPACPI_FAN_CMD_ENABLE) &&
4276                       (fan_write_cmd_enable(cmd, &rc) ||
4277                        fan_write_cmd_disable(cmd, &rc) ||
4278                        fan_write_cmd_watchdog(cmd, &rc))) &&
4279                     !((fan_control_commands & TPACPI_FAN_CMD_SPEED) &&
4280                       fan_write_cmd_speed(cmd, &rc))
4281                     )
4282                         rc = -EINVAL;
4283                 else if (!rc)
4284                         fan_watchdog_reset();
4285         }
4286
4287         return rc;
4288 }
4289
4290 static struct ibm_struct fan_driver_data = {
4291         .name = "fan",
4292         .read = fan_read,
4293         .write = fan_write,
4294         .exit = fan_exit,
4295 };
4296
4297 /****************************************************************************
4298  ****************************************************************************
4299  *
4300  * Infrastructure
4301  *
4302  ****************************************************************************
4303  ****************************************************************************/
4304
4305 /* /proc support */
4306 static struct proc_dir_entry *proc_dir;
4307
4308 /* Subdriver registry */
4309 static LIST_HEAD(tpacpi_all_drivers);
4310
4311
4312 /*
4313  * Module and infrastructure proble, init and exit handling
4314  */
4315
4316 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
4317 static const char * __init str_supported(int is_supported)
4318 {
4319         static char text_unsupported[] __initdata = "not supported";
4320
4321         return (is_supported)? &text_unsupported[4] : &text_unsupported[0];
4322 }
4323 #endif /* CONFIG_THINKPAD_ACPI_DEBUG */
4324
4325 static int __init ibm_init(struct ibm_init_struct *iibm)
4326 {
4327         int ret;
4328         struct ibm_struct *ibm = iibm->data;
4329         struct proc_dir_entry *entry;
4330
4331         BUG_ON(ibm == NULL);
4332
4333         INIT_LIST_HEAD(&ibm->all_drivers);
4334
4335         if (ibm->flags.experimental && !experimental)
4336                 return 0;
4337
4338         dbg_printk(TPACPI_DBG_INIT,
4339                 "probing for %s\n", ibm->name);
4340
4341         if (iibm->init) {
4342                 ret = iibm->init(iibm);
4343                 if (ret > 0)
4344                         return 0;       /* probe failed */
4345                 if (ret)
4346                         return ret;
4347
4348                 ibm->flags.init_called = 1;
4349         }
4350
4351         if (ibm->acpi) {
4352                 if (ibm->acpi->hid) {
4353                         ret = register_tpacpi_subdriver(ibm);
4354                         if (ret)
4355                                 goto err_out;
4356                 }
4357
4358                 if (ibm->acpi->notify) {
4359                         ret = setup_acpi_notify(ibm);
4360                         if (ret == -ENODEV) {
4361                                 printk(IBM_NOTICE "disabling subdriver %s\n",
4362                                         ibm->name);
4363                                 ret = 0;
4364                                 goto err_out;
4365                         }
4366                         if (ret < 0)
4367                                 goto err_out;
4368                 }
4369         }
4370
4371         dbg_printk(TPACPI_DBG_INIT,
4372                 "%s installed\n", ibm->name);
4373
4374         if (ibm->read) {
4375                 entry = create_proc_entry(ibm->name,
4376                                           S_IFREG | S_IRUGO | S_IWUSR,
4377                                           proc_dir);
4378                 if (!entry) {
4379                         printk(IBM_ERR "unable to create proc entry %s\n",
4380                                ibm->name);
4381                         ret = -ENODEV;
4382                         goto err_out;
4383                 }
4384                 entry->owner = THIS_MODULE;
4385                 entry->data = ibm;
4386                 entry->read_proc = &dispatch_procfs_read;
4387                 if (ibm->write)
4388                         entry->write_proc = &dispatch_procfs_write;
4389                 ibm->flags.proc_created = 1;
4390         }
4391
4392         list_add_tail(&ibm->all_drivers, &tpacpi_all_drivers);
4393
4394         return 0;
4395
4396 err_out:
4397         dbg_printk(TPACPI_DBG_INIT,
4398                 "%s: at error exit path with result %d\n",
4399                 ibm->name, ret);
4400
4401         ibm_exit(ibm);
4402         return (ret < 0)? ret : 0;
4403 }
4404
4405 static void ibm_exit(struct ibm_struct *ibm)
4406 {
4407         dbg_printk(TPACPI_DBG_EXIT, "removing %s\n", ibm->name);
4408
4409         list_del_init(&ibm->all_drivers);
4410
4411         if (ibm->flags.acpi_notify_installed) {
4412                 dbg_printk(TPACPI_DBG_EXIT,
4413                         "%s: acpi_remove_notify_handler\n", ibm->name);
4414                 BUG_ON(!ibm->acpi);
4415                 acpi_remove_notify_handler(*ibm->acpi->handle,
4416                                            ibm->acpi->type,
4417                                            dispatch_acpi_notify);
4418                 ibm->flags.acpi_notify_installed = 0;
4419                 ibm->flags.acpi_notify_installed = 0;
4420         }
4421
4422         if (ibm->flags.proc_created) {
4423                 dbg_printk(TPACPI_DBG_EXIT,
4424                         "%s: remove_proc_entry\n", ibm->name);
4425                 remove_proc_entry(ibm->name, proc_dir);
4426                 ibm->flags.proc_created = 0;
4427         }
4428
4429         if (ibm->flags.acpi_driver_registered) {
4430                 dbg_printk(TPACPI_DBG_EXIT,
4431                         "%s: acpi_bus_unregister_driver\n", ibm->name);
4432                 BUG_ON(!ibm->acpi);
4433                 acpi_bus_unregister_driver(ibm->acpi->driver);
4434                 kfree(ibm->acpi->driver);
4435                 ibm->acpi->driver = NULL;
4436                 ibm->flags.acpi_driver_registered = 0;
4437         }
4438
4439         if (ibm->flags.init_called && ibm->exit) {
4440                 ibm->exit();
4441                 ibm->flags.init_called = 0;
4442         }
4443
4444         dbg_printk(TPACPI_DBG_INIT, "finished removing %s\n", ibm->name);
4445 }
4446
4447 /* Probing */
4448
4449 static void __init get_thinkpad_model_data(struct thinkpad_id_data *tp)
4450 {
4451         const struct dmi_device *dev = NULL;
4452         char ec_fw_string[18];
4453
4454         if (!tp)
4455                 return;
4456
4457         memset(tp, 0, sizeof(*tp));
4458
4459         if (dmi_name_in_vendors("IBM"))
4460                 tp->vendor = PCI_VENDOR_ID_IBM;
4461         else if (dmi_name_in_vendors("LENOVO"))
4462                 tp->vendor = PCI_VENDOR_ID_LENOVO;
4463         else
4464                 return;
4465
4466         tp->bios_version_str = kstrdup(dmi_get_system_info(DMI_BIOS_VERSION),
4467                                         GFP_KERNEL);
4468         if (!tp->bios_version_str)
4469                 return;
4470         tp->bios_model = tp->bios_version_str[0]
4471                          | (tp->bios_version_str[1] << 8);
4472
4473         /*
4474          * ThinkPad T23 or newer, A31 or newer, R50e or newer,
4475          * X32 or newer, all Z series;  Some models must have an
4476          * up-to-date BIOS or they will not be detected.
4477          *
4478          * See http://thinkwiki.org/wiki/List_of_DMI_IDs
4479          */
4480         while ((dev = dmi_find_device(DMI_DEV_TYPE_OEM_STRING, NULL, dev))) {
4481                 if (sscanf(dev->name,
4482                            "IBM ThinkPad Embedded Controller -[%17c",
4483                            ec_fw_string) == 1) {
4484                         ec_fw_string[sizeof(ec_fw_string) - 1] = 0;
4485                         ec_fw_string[strcspn(ec_fw_string, " ]")] = 0;
4486
4487                         tp->ec_version_str = kstrdup(ec_fw_string, GFP_KERNEL);
4488                         tp->ec_model = ec_fw_string[0]
4489                                         | (ec_fw_string[1] << 8);
4490                         break;
4491                 }
4492         }
4493
4494         tp->model_str = kstrdup(dmi_get_system_info(DMI_PRODUCT_VERSION),
4495                                         GFP_KERNEL);
4496         if (strnicmp(tp->model_str, "ThinkPad", 8) != 0) {
4497                 kfree(tp->model_str);
4498                 tp->model_str = NULL;
4499         }
4500 }
4501
4502 static int __init probe_for_thinkpad(void)
4503 {
4504         int is_thinkpad;
4505
4506         if (acpi_disabled)
4507                 return -ENODEV;
4508
4509         /*
4510          * Non-ancient models have better DMI tagging, but very old models
4511          * don't.
4512          */
4513         is_thinkpad = (thinkpad_id.model_str != NULL);
4514
4515         /* ec is required because many other handles are relative to it */
4516         IBM_ACPIHANDLE_INIT(ec);
4517         if (!ec_handle) {
4518                 if (is_thinkpad)
4519                         printk(IBM_ERR
4520                                 "Not yet supported ThinkPad detected!\n");
4521                 return -ENODEV;
4522         }
4523
4524         /*
4525          * Risks a regression on very old machines, but reduces potential
4526          * false positives a damn great deal
4527          */
4528         if (!is_thinkpad)
4529                 is_thinkpad = (thinkpad_id.vendor == PCI_VENDOR_ID_IBM);
4530
4531         if (!is_thinkpad && !force_load)
4532                 return -ENODEV;
4533
4534         return 0;
4535 }
4536
4537
4538 /* Module init, exit, parameters */
4539
4540 static struct ibm_init_struct ibms_init[] __initdata = {
4541         {
4542                 .init = thinkpad_acpi_driver_init,
4543                 .data = &thinkpad_acpi_driver_data,
4544         },
4545         {
4546                 .init = hotkey_init,
4547                 .data = &hotkey_driver_data,
4548         },
4549         {
4550                 .init = bluetooth_init,
4551                 .data = &bluetooth_driver_data,
4552         },
4553         {
4554                 .init = wan_init,
4555                 .data = &wan_driver_data,
4556         },
4557         {
4558                 .init = video_init,
4559                 .data = &video_driver_data,
4560         },
4561         {
4562                 .init = light_init,
4563                 .data = &light_driver_data,
4564         },
4565 #ifdef CONFIG_THINKPAD_ACPI_DOCK
4566         {
4567                 .init = dock_init,
4568                 .data = &dock_driver_data[0],
4569         },
4570         {
4571                 .init = dock_init2,
4572                 .data = &dock_driver_data[1],
4573         },
4574 #endif
4575 #ifdef CONFIG_THINKPAD_ACPI_BAY
4576         {
4577                 .init = bay_init,
4578                 .data = &bay_driver_data,
4579         },
4580 #endif
4581         {
4582                 .init = cmos_init,
4583                 .data = &cmos_driver_data,
4584         },
4585         {
4586                 .init = led_init,
4587                 .data = &led_driver_data,
4588         },
4589         {
4590                 .init = beep_init,
4591                 .data = &beep_driver_data,
4592         },
4593         {
4594                 .init = thermal_init,
4595                 .data = &thermal_driver_data,
4596         },
4597         {
4598                 .data = &ecdump_driver_data,
4599         },
4600         {
4601                 .init = brightness_init,
4602                 .data = &brightness_driver_data,
4603         },
4604         {
4605                 .data = &volume_driver_data,
4606         },
4607         {
4608                 .init = fan_init,
4609                 .data = &fan_driver_data,
4610         },
4611 };
4612
4613 static int __init set_ibm_param(const char *val, struct kernel_param *kp)
4614 {
4615         unsigned int i;
4616         struct ibm_struct *ibm;
4617
4618         for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
4619                 ibm = ibms_init[i].data;
4620                 BUG_ON(ibm == NULL);
4621
4622                 if (strcmp(ibm->name, kp->name) == 0 && ibm->write) {
4623                         if (strlen(val) > sizeof(ibms_init[i].param) - 2)
4624                                 return -ENOSPC;
4625                         strcpy(ibms_init[i].param, val);
4626                         strcat(ibms_init[i].param, ",");
4627                         return 0;
4628                 }
4629         }
4630
4631         return -EINVAL;
4632 }
4633
4634 static int experimental;
4635 module_param(experimental, int, 0);
4636
4637 static u32 dbg_level;
4638 module_param_named(debug, dbg_level, uint, 0);
4639
4640 static int force_load;
4641 module_param(force_load, bool, 0);
4642
4643 static int fan_control_allowed;
4644 module_param_named(fan_control, fan_control_allowed, bool, 0);
4645
4646 static int brightness_mode;
4647 module_param_named(brightness_mode, brightness_mode, int, 0);
4648
4649 static unsigned int hotkey_report_mode;
4650 module_param(hotkey_report_mode, uint, 0);
4651
4652 #define IBM_PARAM(feature) \
4653         module_param_call(feature, set_ibm_param, NULL, NULL, 0)
4654
4655 IBM_PARAM(hotkey);
4656 IBM_PARAM(bluetooth);
4657 IBM_PARAM(video);
4658 IBM_PARAM(light);
4659 #ifdef CONFIG_THINKPAD_ACPI_DOCK
4660 IBM_PARAM(dock);
4661 #endif
4662 #ifdef CONFIG_THINKPAD_ACPI_BAY
4663 IBM_PARAM(bay);
4664 #endif /* CONFIG_THINKPAD_ACPI_BAY */
4665 IBM_PARAM(cmos);
4666 IBM_PARAM(led);
4667 IBM_PARAM(beep);
4668 IBM_PARAM(ecdump);
4669 IBM_PARAM(brightness);
4670 IBM_PARAM(volume);
4671 IBM_PARAM(fan);
4672
4673 static int __init thinkpad_acpi_module_init(void)
4674 {
4675         int ret, i;
4676
4677         /* Parameter checking */
4678         if (hotkey_report_mode > 2)
4679                 return -EINVAL;
4680
4681         /* Driver-level probe */
4682
4683         get_thinkpad_model_data(&thinkpad_id);
4684         ret = probe_for_thinkpad();
4685         if (ret) {
4686                 thinkpad_acpi_module_exit();
4687                 return ret;
4688         }
4689
4690         /* Driver initialization */
4691
4692         IBM_ACPIHANDLE_INIT(ecrd);
4693         IBM_ACPIHANDLE_INIT(ecwr);
4694
4695         proc_dir = proc_mkdir(IBM_PROC_DIR, acpi_root_dir);
4696         if (!proc_dir) {
4697                 printk(IBM_ERR "unable to create proc dir " IBM_PROC_DIR);
4698                 thinkpad_acpi_module_exit();
4699                 return -ENODEV;
4700         }
4701         proc_dir->owner = THIS_MODULE;
4702
4703         ret = platform_driver_register(&tpacpi_pdriver);
4704         if (ret) {
4705                 printk(IBM_ERR "unable to register platform driver\n");
4706                 thinkpad_acpi_module_exit();
4707                 return ret;
4708         }
4709         tp_features.platform_drv_registered = 1;
4710
4711         ret = tpacpi_create_driver_attributes(&tpacpi_pdriver.driver);
4712         if (ret) {
4713                 printk(IBM_ERR "unable to create sysfs driver attributes\n");
4714                 thinkpad_acpi_module_exit();
4715                 return ret;
4716         }
4717         tp_features.platform_drv_attrs_registered = 1;
4718
4719
4720         /* Device initialization */
4721         tpacpi_pdev = platform_device_register_simple(IBM_DRVR_NAME, -1,
4722                                                         NULL, 0);
4723         if (IS_ERR(tpacpi_pdev)) {
4724                 ret = PTR_ERR(tpacpi_pdev);
4725                 tpacpi_pdev = NULL;
4726                 printk(IBM_ERR "unable to register platform device\n");
4727                 thinkpad_acpi_module_exit();
4728                 return ret;
4729         }
4730         tpacpi_hwmon = hwmon_device_register(&tpacpi_pdev->dev);
4731         if (IS_ERR(tpacpi_hwmon)) {
4732                 ret = PTR_ERR(tpacpi_hwmon);
4733                 tpacpi_hwmon = NULL;
4734                 printk(IBM_ERR "unable to register hwmon device\n");
4735                 thinkpad_acpi_module_exit();
4736                 return ret;
4737         }
4738         tpacpi_inputdev = input_allocate_device();
4739         if (!tpacpi_inputdev) {
4740                 printk(IBM_ERR "unable to allocate input device\n");
4741                 thinkpad_acpi_module_exit();
4742                 return -ENOMEM;
4743         } else {
4744                 /* Prepare input device, but don't register */
4745                 tpacpi_inputdev->name = "ThinkPad Extra Buttons";
4746                 tpacpi_inputdev->phys = IBM_DRVR_NAME "/input0";
4747                 tpacpi_inputdev->id.bustype = BUS_HOST;
4748                 tpacpi_inputdev->id.vendor = (thinkpad_id.vendor) ?
4749                                                 thinkpad_id.vendor :
4750                                                 PCI_VENDOR_ID_IBM;
4751                 tpacpi_inputdev->id.product = TPACPI_HKEY_INPUT_PRODUCT;
4752                 tpacpi_inputdev->id.version = TPACPI_HKEY_INPUT_VERSION;
4753         }
4754         for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
4755                 ret = ibm_init(&ibms_init[i]);
4756                 if (ret >= 0 && *ibms_init[i].param)
4757                         ret = ibms_init[i].data->write(ibms_init[i].param);
4758                 if (ret < 0) {
4759                         thinkpad_acpi_module_exit();
4760                         return ret;
4761                 }
4762         }
4763         ret = input_register_device(tpacpi_inputdev);
4764         if (ret < 0) {
4765                 printk(IBM_ERR "unable to register input device\n");
4766                 thinkpad_acpi_module_exit();
4767                 return ret;
4768         } else {
4769                 tp_features.input_device_registered = 1;
4770         }
4771
4772         return 0;
4773 }
4774
4775 static void thinkpad_acpi_module_exit(void)
4776 {
4777         struct ibm_struct *ibm, *itmp;
4778
4779         list_for_each_entry_safe_reverse(ibm, itmp,
4780                                          &tpacpi_all_drivers,
4781                                          all_drivers) {
4782                 ibm_exit(ibm);
4783         }
4784
4785         dbg_printk(TPACPI_DBG_INIT, "finished subdriver exit path...\n");
4786
4787         if (tpacpi_inputdev) {
4788                 if (tp_features.input_device_registered)
4789                         input_unregister_device(tpacpi_inputdev);
4790                 else
4791                         input_free_device(tpacpi_inputdev);
4792         }
4793
4794         if (tpacpi_hwmon)
4795                 hwmon_device_unregister(tpacpi_hwmon);
4796
4797         if (tpacpi_pdev)
4798                 platform_device_unregister(tpacpi_pdev);
4799
4800         if (tp_features.platform_drv_attrs_registered)
4801                 tpacpi_remove_driver_attributes(&tpacpi_pdriver.driver);
4802
4803         if (tp_features.platform_drv_registered)
4804                 platform_driver_unregister(&tpacpi_pdriver);
4805
4806         if (proc_dir)
4807                 remove_proc_entry(IBM_PROC_DIR, acpi_root_dir);
4808
4809         kfree(thinkpad_id.bios_version_str);
4810         kfree(thinkpad_id.ec_version_str);
4811         kfree(thinkpad_id.model_str);
4812 }
4813
4814 module_init(thinkpad_acpi_module_init);
4815 module_exit(thinkpad_acpi_module_exit);