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ACPI: thinkpad-acpi: fix the module init failure path
[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 "0.15"
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 class_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 /* --------------------------------------------------------------------- */
910
911 static struct attribute *hotkey_mask_attributes[] = {
912         &dev_attr_hotkey_mask.attr,
913         &dev_attr_hotkey_bios_enabled.attr,
914         &dev_attr_hotkey_bios_mask.attr,
915         &dev_attr_hotkey_all_mask.attr,
916         &dev_attr_hotkey_recommended_mask.attr,
917 };
918
919 static int __init hotkey_init(struct ibm_init_struct *iibm)
920 {
921
922         static u16 ibm_keycode_map[] __initdata = {
923                 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
924                 KEY_FN_F1,      KEY_FN_F2,      KEY_COFFEE,     KEY_SLEEP,
925                 KEY_WLAN,       KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
926                 KEY_FN_F9,      KEY_FN_F10,     KEY_FN_F11,     KEY_SUSPEND,
927                 /* Scan codes 0x0C to 0x0F: Other ACPI HKEY hot keys */
928                 KEY_UNKNOWN,    /* 0x0C: FN+BACKSPACE */
929                 KEY_UNKNOWN,    /* 0x0D: FN+INSERT */
930                 KEY_UNKNOWN,    /* 0x0E: FN+DELETE */
931                 KEY_RESERVED,   /* 0x0F: FN+HOME (brightness up) */
932                 /* Scan codes 0x10 to 0x1F: Extended ACPI HKEY hot keys */
933                 KEY_RESERVED,   /* 0x10: FN+END (brightness down) */
934                 KEY_RESERVED,   /* 0x11: FN+PGUP (thinklight toggle) */
935                 KEY_UNKNOWN,    /* 0x12: FN+PGDOWN */
936                 KEY_ZOOM,       /* 0x13: FN+SPACE (zoom) */
937                 KEY_RESERVED,   /* 0x14: VOLUME UP */
938                 KEY_RESERVED,   /* 0x15: VOLUME DOWN */
939                 KEY_RESERVED,   /* 0x16: MUTE */
940                 KEY_VENDOR,     /* 0x17: Thinkpad/AccessIBM/Lenovo */
941                 /* (assignments unknown, please report if found) */
942                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
943                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
944         };
945         static u16 lenovo_keycode_map[] __initdata = {
946                 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
947                 KEY_FN_F1,      KEY_COFFEE,     KEY_BATTERY,    KEY_SLEEP,
948                 KEY_WLAN,       KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
949                 KEY_FN_F9,      KEY_FN_F10,     KEY_FN_F11,     KEY_SUSPEND,
950                 /* Scan codes 0x0C to 0x0F: Other ACPI HKEY hot keys */
951                 KEY_UNKNOWN,    /* 0x0C: FN+BACKSPACE */
952                 KEY_UNKNOWN,    /* 0x0D: FN+INSERT */
953                 KEY_UNKNOWN,    /* 0x0E: FN+DELETE */
954                 KEY_BRIGHTNESSUP,       /* 0x0F: FN+HOME (brightness up) */
955                 /* Scan codes 0x10 to 0x1F: Extended ACPI HKEY hot keys */
956                 KEY_BRIGHTNESSDOWN,     /* 0x10: FN+END (brightness down) */
957                 KEY_RESERVED,   /* 0x11: FN+PGUP (thinklight toggle) */
958                 KEY_UNKNOWN,    /* 0x12: FN+PGDOWN */
959                 KEY_ZOOM,       /* 0x13: FN+SPACE (zoom) */
960                 KEY_RESERVED,   /* 0x14: VOLUME UP */
961                 KEY_RESERVED,   /* 0x15: VOLUME DOWN */
962                 KEY_RESERVED,   /* 0x16: MUTE */
963                 KEY_VENDOR,     /* 0x17: Thinkpad/AccessIBM/Lenovo */
964                 /* (assignments unknown, please report if found) */
965                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
966                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
967         };
968
969 #define TPACPI_HOTKEY_MAP_LEN           ARRAY_SIZE(ibm_keycode_map)
970 #define TPACPI_HOTKEY_MAP_SIZE          sizeof(ibm_keycode_map)
971 #define TPACPI_HOTKEY_MAP_TYPESIZE      sizeof(ibm_keycode_map[0])
972
973         int res, i;
974         int status;
975
976         vdbg_printk(TPACPI_DBG_INIT, "initializing hotkey subdriver\n");
977
978         BUG_ON(!tpacpi_inputdev);
979
980         IBM_ACPIHANDLE_INIT(hkey);
981         mutex_init(&hotkey_mutex);
982
983         /* hotkey not supported on 570 */
984         tp_features.hotkey = hkey_handle != NULL;
985
986         vdbg_printk(TPACPI_DBG_INIT, "hotkeys are %s\n",
987                 str_supported(tp_features.hotkey));
988
989         if (tp_features.hotkey) {
990                 hotkey_dev_attributes = create_attr_set(7, NULL);
991                 if (!hotkey_dev_attributes)
992                         return -ENOMEM;
993                 res = add_to_attr_set(hotkey_dev_attributes,
994                                 &dev_attr_hotkey_enable.attr);
995                 if (res)
996                         return res;
997
998                 /* mask not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
999                    A30, R30, R31, T20-22, X20-21, X22-24 */
1000                 tp_features.hotkey_mask =
1001                         acpi_evalf(hkey_handle, NULL, "DHKN", "qv");
1002
1003                 vdbg_printk(TPACPI_DBG_INIT, "hotkey masks are %s\n",
1004                         str_supported(tp_features.hotkey_mask));
1005
1006                 if (tp_features.hotkey_mask) {
1007                         /* MHKA available in A31, R40, R40e, T4x, X31, and later */
1008                         if (!acpi_evalf(hkey_handle, &hotkey_all_mask,
1009                                         "MHKA", "qd"))
1010                                 hotkey_all_mask = 0x080cU; /* FN+F12, FN+F4, FN+F3 */
1011                 }
1012
1013                 res = hotkey_get(&hotkey_orig_status, &hotkey_orig_mask);
1014                 if (!res && tp_features.hotkey_mask) {
1015                         res = add_many_to_attr_set(hotkey_dev_attributes,
1016                                 hotkey_mask_attributes,
1017                                 ARRAY_SIZE(hotkey_mask_attributes));
1018                 }
1019
1020                 /* Not all thinkpads have a hardware radio switch */
1021                 if (!res && acpi_evalf(hkey_handle, &status, "WLSW", "qd")) {
1022                         tp_features.hotkey_wlsw = 1;
1023                         printk(IBM_INFO
1024                                 "radio switch found; radios are %s\n",
1025                                 enabled(status, 0));
1026                         res = add_to_attr_set(hotkey_dev_attributes,
1027                                         &dev_attr_hotkey_radio_sw.attr);
1028                 }
1029
1030                 if (!res)
1031                         res = register_attr_set_with_sysfs(
1032                                         hotkey_dev_attributes,
1033                                         &tpacpi_pdev->dev.kobj);
1034                 if (res)
1035                         return res;
1036
1037                 /* Set up key map */
1038
1039                 hotkey_keycode_map = kmalloc(TPACPI_HOTKEY_MAP_SIZE,
1040                                                 GFP_KERNEL);
1041                 if (!hotkey_keycode_map) {
1042                         printk(IBM_ERR "failed to allocate memory for key map\n");
1043                         return -ENOMEM;
1044                 }
1045
1046                 if (thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO) {
1047                         dbg_printk(TPACPI_DBG_INIT,
1048                                    "using Lenovo default hot key map\n");
1049                         memcpy(hotkey_keycode_map, &lenovo_keycode_map,
1050                                 TPACPI_HOTKEY_MAP_SIZE);
1051                 } else {
1052                         dbg_printk(TPACPI_DBG_INIT,
1053                                    "using IBM default hot key map\n");
1054                         memcpy(hotkey_keycode_map, &ibm_keycode_map,
1055                                 TPACPI_HOTKEY_MAP_SIZE);
1056                 }
1057
1058 #ifndef CONFIG_THINKPAD_ACPI_INPUT_ENABLED
1059                 for (i = 0; i < 12; i++)
1060                         hotkey_keycode_map[i] = KEY_UNKNOWN;
1061 #endif /* ! CONFIG_THINKPAD_ACPI_INPUT_ENABLED */
1062
1063                 set_bit(EV_KEY, tpacpi_inputdev->evbit);
1064                 set_bit(EV_MSC, tpacpi_inputdev->evbit);
1065                 set_bit(MSC_SCAN, tpacpi_inputdev->mscbit);
1066                 tpacpi_inputdev->keycodesize = TPACPI_HOTKEY_MAP_TYPESIZE;
1067                 tpacpi_inputdev->keycodemax = TPACPI_HOTKEY_MAP_LEN;
1068                 tpacpi_inputdev->keycode = hotkey_keycode_map;
1069                 for (i = 0; i < TPACPI_HOTKEY_MAP_LEN; i++) {
1070                         if (hotkey_keycode_map[i] != KEY_RESERVED) {
1071                                 set_bit(hotkey_keycode_map[i],
1072                                         tpacpi_inputdev->keybit);
1073                         } else {
1074                                 if (i < sizeof(hotkey_reserved_mask)*8)
1075                                         hotkey_reserved_mask |= 1 << i;
1076                         }
1077                 }
1078
1079                 if (tp_features.hotkey_wlsw) {
1080                         set_bit(EV_SW, tpacpi_inputdev->evbit);
1081                         set_bit(SW_RADIO, tpacpi_inputdev->swbit);
1082                 }
1083
1084 #ifdef CONFIG_THINKPAD_ACPI_INPUT_ENABLED
1085                 dbg_printk(TPACPI_DBG_INIT,
1086                                 "enabling hot key handling\n");
1087                 res = hotkey_set(1, (hotkey_all_mask & ~hotkey_reserved_mask)
1088                                         | hotkey_orig_mask);
1089                 if (res)
1090                         return res;
1091 #endif /* CONFIG_THINKPAD_ACPI_INPUT_ENABLED */
1092         }
1093
1094         return (tp_features.hotkey)? 0 : 1;
1095 }
1096
1097 static void hotkey_exit(void)
1098 {
1099         int res;
1100
1101         if (tp_features.hotkey) {
1102                 dbg_printk(TPACPI_DBG_EXIT, "restoring original hotkey mask\n");
1103                 res = hotkey_set(hotkey_orig_status, hotkey_orig_mask);
1104                 if (res)
1105                         printk(IBM_ERR "failed to restore hotkey to BIOS defaults\n");
1106         }
1107
1108         if (hotkey_dev_attributes) {
1109                 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
1110                 hotkey_dev_attributes = NULL;
1111         }
1112 }
1113
1114 static void tpacpi_input_send_key(unsigned int scancode,
1115                                   unsigned int keycode)
1116 {
1117         if (keycode != KEY_RESERVED) {
1118                 input_report_key(tpacpi_inputdev, keycode, 1);
1119                 if (keycode == KEY_UNKNOWN)
1120                         input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN,
1121                                     scancode);
1122                 input_sync(tpacpi_inputdev);
1123
1124                 input_report_key(tpacpi_inputdev, keycode, 0);
1125                 if (keycode == KEY_UNKNOWN)
1126                         input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN,
1127                                     scancode);
1128                 input_sync(tpacpi_inputdev);
1129         }
1130 }
1131
1132 static void tpacpi_input_send_radiosw(void)
1133 {
1134         int wlsw;
1135
1136         if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&wlsw))
1137                 input_report_switch(tpacpi_inputdev,
1138                                     SW_RADIO, !!wlsw);
1139 }
1140
1141 static void hotkey_notify(struct ibm_struct *ibm, u32 event)
1142 {
1143         u32 hkey;
1144         unsigned int keycode, scancode;
1145         int sendacpi = 1;
1146
1147         if (event == 0x80 && acpi_evalf(hkey_handle, &hkey, "MHKP", "d")) {
1148                 if (tpacpi_inputdev->users > 0) {
1149                         switch (hkey >> 12) {
1150                         case 1:
1151                                 /* 0x1000-0x1FFF: key presses */
1152                                 scancode = hkey & 0xfff;
1153                                 if (scancode > 0 && scancode < 0x21) {
1154                                         scancode--;
1155                                         keycode = hotkey_keycode_map[scancode];
1156                                         tpacpi_input_send_key(scancode, keycode);
1157                                         sendacpi = (keycode == KEY_RESERVED
1158                                                 || keycode == KEY_UNKNOWN);
1159                                 } else {
1160                                         printk(IBM_ERR
1161                                                "hotkey 0x%04x out of range for keyboard map\n",
1162                                                hkey);
1163                                 }
1164                                 break;
1165                         case 5:
1166                                 /* 0x5000-0x5FFF: LID */
1167                                 /* we don't handle it through this path, just
1168                                  * eat up known LID events */
1169                                 if (hkey != 0x5001 && hkey != 0x5002) {
1170                                         printk(IBM_ERR
1171                                                 "unknown LID-related hotkey event: 0x%04x\n",
1172                                                 hkey);
1173                                 }
1174                                 break;
1175                         case 7:
1176                                 /* 0x7000-0x7FFF: misc */
1177                                 if (tp_features.hotkey_wlsw && hkey == 0x7000) {
1178                                                 tpacpi_input_send_radiosw();
1179                                                 sendacpi = 0;
1180                                         break;
1181                                 }
1182                                 /* fallthrough to default */
1183                         default:
1184                                 /* case 2: dock-related */
1185                                 /*      0x2305 - T43 waking up due to bay lever eject while aslept */
1186                                 /* case 3: ultra-bay related. maybe bay in dock? */
1187                                 /*      0x3003 - T43 after wake up by bay lever eject (0x2305) */
1188                                 printk(IBM_NOTICE "unhandled hotkey event 0x%04x\n", hkey);
1189                         }
1190                 }
1191
1192                 if (sendacpi)
1193                         acpi_bus_generate_event(ibm->acpi->device, event, hkey);
1194         } else {
1195                 printk(IBM_ERR "unknown hotkey notification event %d\n", event);
1196                 acpi_bus_generate_event(ibm->acpi->device, event, 0);
1197         }
1198 }
1199
1200 static void hotkey_resume(void)
1201 {
1202         tpacpi_input_send_radiosw();
1203 }
1204
1205 /*
1206  * Call with hotkey_mutex held
1207  */
1208 static int hotkey_get(int *status, u32 *mask)
1209 {
1210         if (!acpi_evalf(hkey_handle, status, "DHKC", "d"))
1211                 return -EIO;
1212
1213         if (tp_features.hotkey_mask)
1214                 if (!acpi_evalf(hkey_handle, mask, "DHKN", "d"))
1215                         return -EIO;
1216
1217         return 0;
1218 }
1219
1220 /*
1221  * Call with hotkey_mutex held
1222  */
1223 static int hotkey_set(int status, u32 mask)
1224 {
1225         int i;
1226
1227         if (!acpi_evalf(hkey_handle, NULL, "MHKC", "vd", status))
1228                 return -EIO;
1229
1230         if (tp_features.hotkey_mask)
1231                 for (i = 0; i < 32; i++) {
1232                         int bit = ((1 << i) & mask) != 0;
1233                         if (!acpi_evalf(hkey_handle,
1234                                         NULL, "MHKM", "vdd", i + 1, bit))
1235                                 return -EIO;
1236                 }
1237
1238         return 0;
1239 }
1240
1241 /* procfs -------------------------------------------------------------- */
1242 static int hotkey_read(char *p)
1243 {
1244         int res, status;
1245         u32 mask;
1246         int len = 0;
1247
1248         if (!tp_features.hotkey) {
1249                 len += sprintf(p + len, "status:\t\tnot supported\n");
1250                 return len;
1251         }
1252
1253         res = mutex_lock_interruptible(&hotkey_mutex);
1254         if (res < 0)
1255                 return res;
1256         res = hotkey_get(&status, &mask);
1257         mutex_unlock(&hotkey_mutex);
1258         if (res)
1259                 return res;
1260
1261         len += sprintf(p + len, "status:\t\t%s\n", enabled(status, 0));
1262         if (tp_features.hotkey_mask) {
1263                 len += sprintf(p + len, "mask:\t\t0x%08x\n", mask);
1264                 len += sprintf(p + len,
1265                                "commands:\tenable, disable, reset, <mask>\n");
1266         } else {
1267                 len += sprintf(p + len, "mask:\t\tnot supported\n");
1268                 len += sprintf(p + len, "commands:\tenable, disable, reset\n");
1269         }
1270
1271         return len;
1272 }
1273
1274 static int hotkey_write(char *buf)
1275 {
1276         int res, status;
1277         u32 mask;
1278         char *cmd;
1279         int do_cmd = 0;
1280
1281         if (!tp_features.hotkey)
1282                 return -ENODEV;
1283
1284         res = mutex_lock_interruptible(&hotkey_mutex);
1285         if (res < 0)
1286                 return res;
1287
1288         res = hotkey_get(&status, &mask);
1289         if (res)
1290                 goto errexit;
1291
1292         res = 0;
1293         while ((cmd = next_cmd(&buf))) {
1294                 if (strlencmp(cmd, "enable") == 0) {
1295                         status = 1;
1296                 } else if (strlencmp(cmd, "disable") == 0) {
1297                         status = 0;
1298                 } else if (strlencmp(cmd, "reset") == 0) {
1299                         status = hotkey_orig_status;
1300                         mask = hotkey_orig_mask;
1301                 } else if (sscanf(cmd, "0x%x", &mask) == 1) {
1302                         /* mask set */
1303                 } else if (sscanf(cmd, "%x", &mask) == 1) {
1304                         /* mask set */
1305                 } else {
1306                         res = -EINVAL;
1307                         goto errexit;
1308                 }
1309                 do_cmd = 1;
1310         }
1311
1312         if (do_cmd)
1313                 res = hotkey_set(status, mask);
1314
1315 errexit:
1316         mutex_unlock(&hotkey_mutex);
1317         return res;
1318 }
1319
1320 static const struct acpi_device_id ibm_htk_device_ids[] = {
1321         {IBM_HKEY_HID, 0},
1322         {"", 0},
1323 };
1324
1325 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver = {
1326         .hid = ibm_htk_device_ids,
1327         .notify = hotkey_notify,
1328         .handle = &hkey_handle,
1329         .type = ACPI_DEVICE_NOTIFY,
1330 };
1331
1332 static struct ibm_struct hotkey_driver_data = {
1333         .name = "hotkey",
1334         .read = hotkey_read,
1335         .write = hotkey_write,
1336         .exit = hotkey_exit,
1337         .resume = hotkey_resume,
1338         .acpi = &ibm_hotkey_acpidriver,
1339 };
1340
1341 /*************************************************************************
1342  * Bluetooth subdriver
1343  */
1344
1345 /* sysfs bluetooth enable ---------------------------------------------- */
1346 static ssize_t bluetooth_enable_show(struct device *dev,
1347                            struct device_attribute *attr,
1348                            char *buf)
1349 {
1350         int status;
1351
1352         status = bluetooth_get_radiosw();
1353         if (status < 0)
1354                 return status;
1355
1356         return snprintf(buf, PAGE_SIZE, "%d\n", status ? 1 : 0);
1357 }
1358
1359 static ssize_t bluetooth_enable_store(struct device *dev,
1360                             struct device_attribute *attr,
1361                             const char *buf, size_t count)
1362 {
1363         unsigned long t;
1364         int res;
1365
1366         if (parse_strtoul(buf, 1, &t))
1367                 return -EINVAL;
1368
1369         res = bluetooth_set_radiosw(t);
1370
1371         return (res) ? res : count;
1372 }
1373
1374 static struct device_attribute dev_attr_bluetooth_enable =
1375         __ATTR(bluetooth_enable, S_IWUSR | S_IRUGO,
1376                 bluetooth_enable_show, bluetooth_enable_store);
1377
1378 /* --------------------------------------------------------------------- */
1379
1380 static struct attribute *bluetooth_attributes[] = {
1381         &dev_attr_bluetooth_enable.attr,
1382         NULL
1383 };
1384
1385 static const struct attribute_group bluetooth_attr_group = {
1386         .attrs = bluetooth_attributes,
1387 };
1388
1389 static int __init bluetooth_init(struct ibm_init_struct *iibm)
1390 {
1391         int res;
1392         int status = 0;
1393
1394         vdbg_printk(TPACPI_DBG_INIT, "initializing bluetooth subdriver\n");
1395
1396         IBM_ACPIHANDLE_INIT(hkey);
1397
1398         /* bluetooth not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
1399            G4x, R30, R31, R40e, R50e, T20-22, X20-21 */
1400         tp_features.bluetooth = hkey_handle &&
1401             acpi_evalf(hkey_handle, &status, "GBDC", "qd");
1402
1403         vdbg_printk(TPACPI_DBG_INIT, "bluetooth is %s, status 0x%02x\n",
1404                 str_supported(tp_features.bluetooth),
1405                 status);
1406
1407         if (tp_features.bluetooth) {
1408                 if (!(status & TP_ACPI_BLUETOOTH_HWPRESENT)) {
1409                         /* no bluetooth hardware present in system */
1410                         tp_features.bluetooth = 0;
1411                         dbg_printk(TPACPI_DBG_INIT,
1412                                    "bluetooth hardware not installed\n");
1413                 } else {
1414                         res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
1415                                         &bluetooth_attr_group);
1416                         if (res)
1417                                 return res;
1418                 }
1419         }
1420
1421         return (tp_features.bluetooth)? 0 : 1;
1422 }
1423
1424 static void bluetooth_exit(void)
1425 {
1426         sysfs_remove_group(&tpacpi_pdev->dev.kobj,
1427                         &bluetooth_attr_group);
1428 }
1429
1430 static int bluetooth_get_radiosw(void)
1431 {
1432         int status;
1433
1434         if (!tp_features.bluetooth)
1435                 return -ENODEV;
1436
1437         if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
1438                 return -EIO;
1439
1440         return ((status & TP_ACPI_BLUETOOTH_RADIOSSW) != 0);
1441 }
1442
1443 static int bluetooth_set_radiosw(int radio_on)
1444 {
1445         int status;
1446
1447         if (!tp_features.bluetooth)
1448                 return -ENODEV;
1449
1450         if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
1451                 return -EIO;
1452         if (radio_on)
1453                 status |= TP_ACPI_BLUETOOTH_RADIOSSW;
1454         else
1455                 status &= ~TP_ACPI_BLUETOOTH_RADIOSSW;
1456         if (!acpi_evalf(hkey_handle, NULL, "SBDC", "vd", status))
1457                 return -EIO;
1458
1459         return 0;
1460 }
1461
1462 /* procfs -------------------------------------------------------------- */
1463 static int bluetooth_read(char *p)
1464 {
1465         int len = 0;
1466         int status = bluetooth_get_radiosw();
1467
1468         if (!tp_features.bluetooth)
1469                 len += sprintf(p + len, "status:\t\tnot supported\n");
1470         else {
1471                 len += sprintf(p + len, "status:\t\t%s\n",
1472                                 (status)? "enabled" : "disabled");
1473                 len += sprintf(p + len, "commands:\tenable, disable\n");
1474         }
1475
1476         return len;
1477 }
1478
1479 static int bluetooth_write(char *buf)
1480 {
1481         char *cmd;
1482
1483         if (!tp_features.bluetooth)
1484                 return -ENODEV;
1485
1486         while ((cmd = next_cmd(&buf))) {
1487                 if (strlencmp(cmd, "enable") == 0) {
1488                         bluetooth_set_radiosw(1);
1489                 } else if (strlencmp(cmd, "disable") == 0) {
1490                         bluetooth_set_radiosw(0);
1491                 } else
1492                         return -EINVAL;
1493         }
1494
1495         return 0;
1496 }
1497
1498 static struct ibm_struct bluetooth_driver_data = {
1499         .name = "bluetooth",
1500         .read = bluetooth_read,
1501         .write = bluetooth_write,
1502         .exit = bluetooth_exit,
1503 };
1504
1505 /*************************************************************************
1506  * Wan subdriver
1507  */
1508
1509 /* sysfs wan enable ---------------------------------------------------- */
1510 static ssize_t wan_enable_show(struct device *dev,
1511                            struct device_attribute *attr,
1512                            char *buf)
1513 {
1514         int status;
1515
1516         status = wan_get_radiosw();
1517         if (status < 0)
1518                 return status;
1519
1520         return snprintf(buf, PAGE_SIZE, "%d\n", status ? 1 : 0);
1521 }
1522
1523 static ssize_t wan_enable_store(struct device *dev,
1524                             struct device_attribute *attr,
1525                             const char *buf, size_t count)
1526 {
1527         unsigned long t;
1528         int res;
1529
1530         if (parse_strtoul(buf, 1, &t))
1531                 return -EINVAL;
1532
1533         res = wan_set_radiosw(t);
1534
1535         return (res) ? res : count;
1536 }
1537
1538 static struct device_attribute dev_attr_wan_enable =
1539         __ATTR(wwan_enable, S_IWUSR | S_IRUGO,
1540                 wan_enable_show, wan_enable_store);
1541
1542 /* --------------------------------------------------------------------- */
1543
1544 static struct attribute *wan_attributes[] = {
1545         &dev_attr_wan_enable.attr,
1546         NULL
1547 };
1548
1549 static const struct attribute_group wan_attr_group = {
1550         .attrs = wan_attributes,
1551 };
1552
1553 static int __init wan_init(struct ibm_init_struct *iibm)
1554 {
1555         int res;
1556         int status = 0;
1557
1558         vdbg_printk(TPACPI_DBG_INIT, "initializing wan subdriver\n");
1559
1560         IBM_ACPIHANDLE_INIT(hkey);
1561
1562         tp_features.wan = hkey_handle &&
1563             acpi_evalf(hkey_handle, &status, "GWAN", "qd");
1564
1565         vdbg_printk(TPACPI_DBG_INIT, "wan is %s, status 0x%02x\n",
1566                 str_supported(tp_features.wan),
1567                 status);
1568
1569         if (tp_features.wan) {
1570                 if (!(status & TP_ACPI_WANCARD_HWPRESENT)) {
1571                         /* no wan hardware present in system */
1572                         tp_features.wan = 0;
1573                         dbg_printk(TPACPI_DBG_INIT,
1574                                    "wan hardware not installed\n");
1575                 } else {
1576                         res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
1577                                         &wan_attr_group);
1578                         if (res)
1579                                 return res;
1580                 }
1581         }
1582
1583         return (tp_features.wan)? 0 : 1;
1584 }
1585
1586 static void wan_exit(void)
1587 {
1588         sysfs_remove_group(&tpacpi_pdev->dev.kobj,
1589                 &wan_attr_group);
1590 }
1591
1592 static int wan_get_radiosw(void)
1593 {
1594         int status;
1595
1596         if (!tp_features.wan)
1597                 return -ENODEV;
1598
1599         if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
1600                 return -EIO;
1601
1602         return ((status & TP_ACPI_WANCARD_RADIOSSW) != 0);
1603 }
1604
1605 static int wan_set_radiosw(int radio_on)
1606 {
1607         int status;
1608
1609         if (!tp_features.wan)
1610                 return -ENODEV;
1611
1612         if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
1613                 return -EIO;
1614         if (radio_on)
1615                 status |= TP_ACPI_WANCARD_RADIOSSW;
1616         else
1617                 status &= ~TP_ACPI_WANCARD_RADIOSSW;
1618         if (!acpi_evalf(hkey_handle, NULL, "SWAN", "vd", status))
1619                 return -EIO;
1620
1621         return 0;
1622 }
1623
1624 /* procfs -------------------------------------------------------------- */
1625 static int wan_read(char *p)
1626 {
1627         int len = 0;
1628         int status = wan_get_radiosw();
1629
1630         if (!tp_features.wan)
1631                 len += sprintf(p + len, "status:\t\tnot supported\n");
1632         else {
1633                 len += sprintf(p + len, "status:\t\t%s\n",
1634                                 (status)? "enabled" : "disabled");
1635                 len += sprintf(p + len, "commands:\tenable, disable\n");
1636         }
1637
1638         return len;
1639 }
1640
1641 static int wan_write(char *buf)
1642 {
1643         char *cmd;
1644
1645         if (!tp_features.wan)
1646                 return -ENODEV;
1647
1648         while ((cmd = next_cmd(&buf))) {
1649                 if (strlencmp(cmd, "enable") == 0) {
1650                         wan_set_radiosw(1);
1651                 } else if (strlencmp(cmd, "disable") == 0) {
1652                         wan_set_radiosw(0);
1653                 } else
1654                         return -EINVAL;
1655         }
1656
1657         return 0;
1658 }
1659
1660 static struct ibm_struct wan_driver_data = {
1661         .name = "wan",
1662         .read = wan_read,
1663         .write = wan_write,
1664         .exit = wan_exit,
1665         .flags.experimental = 1,
1666 };
1667
1668 /*************************************************************************
1669  * Video subdriver
1670  */
1671
1672 static enum video_access_mode video_supported;
1673 static int video_orig_autosw;
1674
1675 IBM_HANDLE(vid, root, "\\_SB.PCI.AGP.VGA",      /* 570 */
1676            "\\_SB.PCI0.AGP0.VID0",      /* 600e/x, 770x */
1677            "\\_SB.PCI0.VID0",   /* 770e */
1678            "\\_SB.PCI0.VID",    /* A21e, G4x, R50e, X30, X40 */
1679            "\\_SB.PCI0.AGP.VID",        /* all others */
1680            );                           /* R30, R31 */
1681
1682 IBM_HANDLE(vid2, root, "\\_SB.PCI0.AGPB.VID");  /* G41 */
1683
1684 static int __init video_init(struct ibm_init_struct *iibm)
1685 {
1686         int ivga;
1687
1688         vdbg_printk(TPACPI_DBG_INIT, "initializing video subdriver\n");
1689
1690         IBM_ACPIHANDLE_INIT(vid);
1691         IBM_ACPIHANDLE_INIT(vid2);
1692
1693         if (vid2_handle && acpi_evalf(NULL, &ivga, "\\IVGA", "d") && ivga)
1694                 /* G41, assume IVGA doesn't change */
1695                 vid_handle = vid2_handle;
1696
1697         if (!vid_handle)
1698                 /* video switching not supported on R30, R31 */
1699                 video_supported = TPACPI_VIDEO_NONE;
1700         else if (acpi_evalf(vid_handle, &video_orig_autosw, "SWIT", "qd"))
1701                 /* 570 */
1702                 video_supported = TPACPI_VIDEO_570;
1703         else if (acpi_evalf(vid_handle, &video_orig_autosw, "^VADL", "qd"))
1704                 /* 600e/x, 770e, 770x */
1705                 video_supported = TPACPI_VIDEO_770;
1706         else
1707                 /* all others */
1708                 video_supported = TPACPI_VIDEO_NEW;
1709
1710         vdbg_printk(TPACPI_DBG_INIT, "video is %s, mode %d\n",
1711                 str_supported(video_supported != TPACPI_VIDEO_NONE),
1712                 video_supported);
1713
1714         return (video_supported != TPACPI_VIDEO_NONE)? 0 : 1;
1715 }
1716
1717 static void video_exit(void)
1718 {
1719         dbg_printk(TPACPI_DBG_EXIT,
1720                    "restoring original video autoswitch mode\n");
1721         if (video_autosw_set(video_orig_autosw))
1722                 printk(IBM_ERR "error while trying to restore original "
1723                         "video autoswitch mode\n");
1724 }
1725
1726 static int video_outputsw_get(void)
1727 {
1728         int status = 0;
1729         int i;
1730
1731         switch (video_supported) {
1732         case TPACPI_VIDEO_570:
1733                 if (!acpi_evalf(NULL, &i, "\\_SB.PHS", "dd",
1734                                  TP_ACPI_VIDEO_570_PHSCMD))
1735                         return -EIO;
1736                 status = i & TP_ACPI_VIDEO_570_PHSMASK;
1737                 break;
1738         case TPACPI_VIDEO_770:
1739                 if (!acpi_evalf(NULL, &i, "\\VCDL", "d"))
1740                         return -EIO;
1741                 if (i)
1742                         status |= TP_ACPI_VIDEO_S_LCD;
1743                 if (!acpi_evalf(NULL, &i, "\\VCDC", "d"))
1744                         return -EIO;
1745                 if (i)
1746                         status |= TP_ACPI_VIDEO_S_CRT;
1747                 break;
1748         case TPACPI_VIDEO_NEW:
1749                 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 1) ||
1750                     !acpi_evalf(NULL, &i, "\\VCDC", "d"))
1751                         return -EIO;
1752                 if (i)
1753                         status |= TP_ACPI_VIDEO_S_CRT;
1754
1755                 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0) ||
1756                     !acpi_evalf(NULL, &i, "\\VCDL", "d"))
1757                         return -EIO;
1758                 if (i)
1759                         status |= TP_ACPI_VIDEO_S_LCD;
1760                 if (!acpi_evalf(NULL, &i, "\\VCDD", "d"))
1761                         return -EIO;
1762                 if (i)
1763                         status |= TP_ACPI_VIDEO_S_DVI;
1764                 break;
1765         default:
1766                 return -ENOSYS;
1767         }
1768
1769         return status;
1770 }
1771
1772 static int video_outputsw_set(int status)
1773 {
1774         int autosw;
1775         int res = 0;
1776
1777         switch (video_supported) {
1778         case TPACPI_VIDEO_570:
1779                 res = acpi_evalf(NULL, NULL,
1780                                  "\\_SB.PHS2", "vdd",
1781                                  TP_ACPI_VIDEO_570_PHS2CMD,
1782                                  status | TP_ACPI_VIDEO_570_PHS2SET);
1783                 break;
1784         case TPACPI_VIDEO_770:
1785                 autosw = video_autosw_get();
1786                 if (autosw < 0)
1787                         return autosw;
1788
1789                 res = video_autosw_set(1);
1790                 if (res)
1791                         return res;
1792                 res = acpi_evalf(vid_handle, NULL,
1793                                  "ASWT", "vdd", status * 0x100, 0);
1794                 if (!autosw && video_autosw_set(autosw)) {
1795                         printk(IBM_ERR "video auto-switch left enabled due to error\n");
1796                         return -EIO;
1797                 }
1798                 break;
1799         case TPACPI_VIDEO_NEW:
1800                 res = acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0x80) &&
1801                         acpi_evalf(NULL, NULL, "\\VSDS", "vdd", status, 1);
1802                 break;
1803         default:
1804                 return -ENOSYS;
1805         }
1806
1807         return (res)? 0 : -EIO;
1808 }
1809
1810 static int video_autosw_get(void)
1811 {
1812         int autosw = 0;
1813
1814         switch (video_supported) {
1815         case TPACPI_VIDEO_570:
1816                 if (!acpi_evalf(vid_handle, &autosw, "SWIT", "d"))
1817                         return -EIO;
1818                 break;
1819         case TPACPI_VIDEO_770:
1820         case TPACPI_VIDEO_NEW:
1821                 if (!acpi_evalf(vid_handle, &autosw, "^VDEE", "d"))
1822                         return -EIO;
1823                 break;
1824         default:
1825                 return -ENOSYS;
1826         }
1827
1828         return autosw & 1;
1829 }
1830
1831 static int video_autosw_set(int enable)
1832 {
1833         if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", (enable)? 1 : 0))
1834                 return -EIO;
1835         return 0;
1836 }
1837
1838 static int video_outputsw_cycle(void)
1839 {
1840         int autosw = video_autosw_get();
1841         int res;
1842
1843         if (autosw < 0)
1844                 return autosw;
1845
1846         switch (video_supported) {
1847         case TPACPI_VIDEO_570:
1848                 res = video_autosw_set(1);
1849                 if (res)
1850                         return res;
1851                 res = acpi_evalf(ec_handle, NULL, "_Q16", "v");
1852                 break;
1853         case TPACPI_VIDEO_770:
1854         case TPACPI_VIDEO_NEW:
1855                 res = video_autosw_set(1);
1856                 if (res)
1857                         return res;
1858                 res = acpi_evalf(vid_handle, NULL, "VSWT", "v");
1859                 break;
1860         default:
1861                 return -ENOSYS;
1862         }
1863         if (!autosw && video_autosw_set(autosw)) {
1864                 printk(IBM_ERR "video auto-switch left enabled due to error\n");
1865                 return -EIO;
1866         }
1867
1868         return (res)? 0 : -EIO;
1869 }
1870
1871 static int video_expand_toggle(void)
1872 {
1873         switch (video_supported) {
1874         case TPACPI_VIDEO_570:
1875                 return acpi_evalf(ec_handle, NULL, "_Q17", "v")?
1876                         0 : -EIO;
1877         case TPACPI_VIDEO_770:
1878                 return acpi_evalf(vid_handle, NULL, "VEXP", "v")?
1879                         0 : -EIO;
1880         case TPACPI_VIDEO_NEW:
1881                 return acpi_evalf(NULL, NULL, "\\VEXP", "v")?
1882                         0 : -EIO;
1883         default:
1884                 return -ENOSYS;
1885         }
1886         /* not reached */
1887 }
1888
1889 static int video_read(char *p)
1890 {
1891         int status, autosw;
1892         int len = 0;
1893
1894         if (video_supported == TPACPI_VIDEO_NONE) {
1895                 len += sprintf(p + len, "status:\t\tnot supported\n");
1896                 return len;
1897         }
1898
1899         status = video_outputsw_get();
1900         if (status < 0)
1901                 return status;
1902
1903         autosw = video_autosw_get();
1904         if (autosw < 0)
1905                 return autosw;
1906
1907         len += sprintf(p + len, "status:\t\tsupported\n");
1908         len += sprintf(p + len, "lcd:\t\t%s\n", enabled(status, 0));
1909         len += sprintf(p + len, "crt:\t\t%s\n", enabled(status, 1));
1910         if (video_supported == TPACPI_VIDEO_NEW)
1911                 len += sprintf(p + len, "dvi:\t\t%s\n", enabled(status, 3));
1912         len += sprintf(p + len, "auto:\t\t%s\n", enabled(autosw, 0));
1913         len += sprintf(p + len, "commands:\tlcd_enable, lcd_disable\n");
1914         len += sprintf(p + len, "commands:\tcrt_enable, crt_disable\n");
1915         if (video_supported == TPACPI_VIDEO_NEW)
1916                 len += sprintf(p + len, "commands:\tdvi_enable, dvi_disable\n");
1917         len += sprintf(p + len, "commands:\tauto_enable, auto_disable\n");
1918         len += sprintf(p + len, "commands:\tvideo_switch, expand_toggle\n");
1919
1920         return len;
1921 }
1922
1923 static int video_write(char *buf)
1924 {
1925         char *cmd;
1926         int enable, disable, status;
1927         int res;
1928
1929         if (video_supported == TPACPI_VIDEO_NONE)
1930                 return -ENODEV;
1931
1932         enable = 0;
1933         disable = 0;
1934
1935         while ((cmd = next_cmd(&buf))) {
1936                 if (strlencmp(cmd, "lcd_enable") == 0) {
1937                         enable |= TP_ACPI_VIDEO_S_LCD;
1938                 } else if (strlencmp(cmd, "lcd_disable") == 0) {
1939                         disable |= TP_ACPI_VIDEO_S_LCD;
1940                 } else if (strlencmp(cmd, "crt_enable") == 0) {
1941                         enable |= TP_ACPI_VIDEO_S_CRT;
1942                 } else if (strlencmp(cmd, "crt_disable") == 0) {
1943                         disable |= TP_ACPI_VIDEO_S_CRT;
1944                 } else if (video_supported == TPACPI_VIDEO_NEW &&
1945                            strlencmp(cmd, "dvi_enable") == 0) {
1946                         enable |= TP_ACPI_VIDEO_S_DVI;
1947                 } else if (video_supported == TPACPI_VIDEO_NEW &&
1948                            strlencmp(cmd, "dvi_disable") == 0) {
1949                         disable |= TP_ACPI_VIDEO_S_DVI;
1950                 } else if (strlencmp(cmd, "auto_enable") == 0) {
1951                         res = video_autosw_set(1);
1952                         if (res)
1953                                 return res;
1954                 } else if (strlencmp(cmd, "auto_disable") == 0) {
1955                         res = video_autosw_set(0);
1956                         if (res)
1957                                 return res;
1958                 } else if (strlencmp(cmd, "video_switch") == 0) {
1959                         res = video_outputsw_cycle();
1960                         if (res)
1961                                 return res;
1962                 } else if (strlencmp(cmd, "expand_toggle") == 0) {
1963                         res = video_expand_toggle();
1964                         if (res)
1965                                 return res;
1966                 } else
1967                         return -EINVAL;
1968         }
1969
1970         if (enable || disable) {
1971                 status = video_outputsw_get();
1972                 if (status < 0)
1973                         return status;
1974                 res = video_outputsw_set((status & ~disable) | enable);
1975                 if (res)
1976                         return res;
1977         }
1978
1979         return 0;
1980 }
1981
1982 static struct ibm_struct video_driver_data = {
1983         .name = "video",
1984         .read = video_read,
1985         .write = video_write,
1986         .exit = video_exit,
1987 };
1988
1989 /*************************************************************************
1990  * Light (thinklight) subdriver
1991  */
1992
1993 IBM_HANDLE(lght, root, "\\LGHT");       /* A21e, A2xm/p, T20-22, X20-21 */
1994 IBM_HANDLE(ledb, ec, "LEDB");           /* G4x */
1995
1996 static int __init light_init(struct ibm_init_struct *iibm)
1997 {
1998         vdbg_printk(TPACPI_DBG_INIT, "initializing light subdriver\n");
1999
2000         IBM_ACPIHANDLE_INIT(ledb);
2001         IBM_ACPIHANDLE_INIT(lght);
2002         IBM_ACPIHANDLE_INIT(cmos);
2003
2004         /* light not supported on 570, 600e/x, 770e, 770x, G4x, R30, R31 */
2005         tp_features.light = (cmos_handle || lght_handle) && !ledb_handle;
2006
2007         if (tp_features.light)
2008                 /* light status not supported on
2009                    570, 600e/x, 770e, 770x, G4x, R30, R31, R32, X20 */
2010                 tp_features.light_status =
2011                         acpi_evalf(ec_handle, NULL, "KBLT", "qv");
2012
2013         vdbg_printk(TPACPI_DBG_INIT, "light is %s\n",
2014                 str_supported(tp_features.light));
2015
2016         return (tp_features.light)? 0 : 1;
2017 }
2018
2019 static int light_read(char *p)
2020 {
2021         int len = 0;
2022         int status = 0;
2023
2024         if (!tp_features.light) {
2025                 len += sprintf(p + len, "status:\t\tnot supported\n");
2026         } else if (!tp_features.light_status) {
2027                 len += sprintf(p + len, "status:\t\tunknown\n");
2028                 len += sprintf(p + len, "commands:\ton, off\n");
2029         } else {
2030                 if (!acpi_evalf(ec_handle, &status, "KBLT", "d"))
2031                         return -EIO;
2032                 len += sprintf(p + len, "status:\t\t%s\n", onoff(status, 0));
2033                 len += sprintf(p + len, "commands:\ton, off\n");
2034         }
2035
2036         return len;
2037 }
2038
2039 static int light_write(char *buf)
2040 {
2041         int cmos_cmd, lght_cmd;
2042         char *cmd;
2043         int success;
2044
2045         if (!tp_features.light)
2046                 return -ENODEV;
2047
2048         while ((cmd = next_cmd(&buf))) {
2049                 if (strlencmp(cmd, "on") == 0) {
2050                         cmos_cmd = 0x0c;
2051                         lght_cmd = 1;
2052                 } else if (strlencmp(cmd, "off") == 0) {
2053                         cmos_cmd = 0x0d;
2054                         lght_cmd = 0;
2055                 } else
2056                         return -EINVAL;
2057
2058                 success = cmos_handle ?
2059                     acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd) :
2060                     acpi_evalf(lght_handle, NULL, NULL, "vd", lght_cmd);
2061                 if (!success)
2062                         return -EIO;
2063         }
2064
2065         return 0;
2066 }
2067
2068 static struct ibm_struct light_driver_data = {
2069         .name = "light",
2070         .read = light_read,
2071         .write = light_write,
2072 };
2073
2074 /*************************************************************************
2075  * Dock subdriver
2076  */
2077
2078 #ifdef CONFIG_THINKPAD_ACPI_DOCK
2079
2080 IBM_HANDLE(dock, root, "\\_SB.GDCK",    /* X30, X31, X40 */
2081            "\\_SB.PCI0.DOCK",   /* 600e/x,770e,770x,A2xm/p,T20-22,X20-21 */
2082            "\\_SB.PCI0.PCI1.DOCK",      /* all others */
2083            "\\_SB.PCI.ISA.SLCE",        /* 570 */
2084     );                          /* A21e,G4x,R30,R31,R32,R40,R40e,R50e */
2085
2086 /* don't list other alternatives as we install a notify handler on the 570 */
2087 IBM_HANDLE(pci, root, "\\_SB.PCI");     /* 570 */
2088
2089 static const struct acpi_device_id ibm_pci_device_ids[] = {
2090         {PCI_ROOT_HID_STRING, 0},
2091         {"", 0},
2092 };
2093
2094 static struct tp_acpi_drv_struct ibm_dock_acpidriver[2] = {
2095         {
2096          .notify = dock_notify,
2097          .handle = &dock_handle,
2098          .type = ACPI_SYSTEM_NOTIFY,
2099         },
2100         {
2101         /* THIS ONE MUST NEVER BE USED FOR DRIVER AUTOLOADING.
2102          * We just use it to get notifications of dock hotplug
2103          * in very old thinkpads */
2104          .hid = ibm_pci_device_ids,
2105          .notify = dock_notify,
2106          .handle = &pci_handle,
2107          .type = ACPI_SYSTEM_NOTIFY,
2108         },
2109 };
2110
2111 static struct ibm_struct dock_driver_data[2] = {
2112         {
2113          .name = "dock",
2114          .read = dock_read,
2115          .write = dock_write,
2116          .acpi = &ibm_dock_acpidriver[0],
2117         },
2118         {
2119          .name = "dock",
2120          .acpi = &ibm_dock_acpidriver[1],
2121         },
2122 };
2123
2124 #define dock_docked() (_sta(dock_handle) & 1)
2125
2126 static int __init dock_init(struct ibm_init_struct *iibm)
2127 {
2128         vdbg_printk(TPACPI_DBG_INIT, "initializing dock subdriver\n");
2129
2130         IBM_ACPIHANDLE_INIT(dock);
2131
2132         vdbg_printk(TPACPI_DBG_INIT, "dock is %s\n",
2133                 str_supported(dock_handle != NULL));
2134
2135         return (dock_handle)? 0 : 1;
2136 }
2137
2138 static int __init dock_init2(struct ibm_init_struct *iibm)
2139 {
2140         int dock2_needed;
2141
2142         vdbg_printk(TPACPI_DBG_INIT, "initializing dock subdriver part 2\n");
2143
2144         if (dock_driver_data[0].flags.acpi_driver_registered &&
2145             dock_driver_data[0].flags.acpi_notify_installed) {
2146                 IBM_ACPIHANDLE_INIT(pci);
2147                 dock2_needed = (pci_handle != NULL);
2148                 vdbg_printk(TPACPI_DBG_INIT,
2149                             "dock PCI handler for the TP 570 is %s\n",
2150                             str_supported(dock2_needed));
2151         } else {
2152                 vdbg_printk(TPACPI_DBG_INIT,
2153                 "dock subdriver part 2 not required\n");
2154                 dock2_needed = 0;
2155         }
2156
2157         return (dock2_needed)? 0 : 1;
2158 }
2159
2160 static void dock_notify(struct ibm_struct *ibm, u32 event)
2161 {
2162         int docked = dock_docked();
2163         int pci = ibm->acpi->hid && ibm->acpi->device &&
2164                 acpi_match_device_ids(ibm->acpi->device, ibm_pci_device_ids);
2165
2166         if (event == 1 && !pci) /* 570 */
2167                 acpi_bus_generate_event(ibm->acpi->device, event, 1);   /* button */
2168         else if (event == 1 && pci)     /* 570 */
2169                 acpi_bus_generate_event(ibm->acpi->device, event, 3);   /* dock */
2170         else if (event == 3 && docked)
2171                 acpi_bus_generate_event(ibm->acpi->device, event, 1);   /* button */
2172         else if (event == 3 && !docked)
2173                 acpi_bus_generate_event(ibm->acpi->device, event, 2);   /* undock */
2174         else if (event == 0 && docked)
2175                 acpi_bus_generate_event(ibm->acpi->device, event, 3);   /* dock */
2176         else {
2177                 printk(IBM_ERR "unknown dock event %d, status %d\n",
2178                        event, _sta(dock_handle));
2179                 acpi_bus_generate_event(ibm->acpi->device, event, 0);   /* unknown */
2180         }
2181 }
2182
2183 static int dock_read(char *p)
2184 {
2185         int len = 0;
2186         int docked = dock_docked();
2187
2188         if (!dock_handle)
2189                 len += sprintf(p + len, "status:\t\tnot supported\n");
2190         else if (!docked)
2191                 len += sprintf(p + len, "status:\t\tundocked\n");
2192         else {
2193                 len += sprintf(p + len, "status:\t\tdocked\n");
2194                 len += sprintf(p + len, "commands:\tdock, undock\n");
2195         }
2196
2197         return len;
2198 }
2199
2200 static int dock_write(char *buf)
2201 {
2202         char *cmd;
2203
2204         if (!dock_docked())
2205                 return -ENODEV;
2206
2207         while ((cmd = next_cmd(&buf))) {
2208                 if (strlencmp(cmd, "undock") == 0) {
2209                         if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 0) ||
2210                             !acpi_evalf(dock_handle, NULL, "_EJ0", "vd", 1))
2211                                 return -EIO;
2212                 } else if (strlencmp(cmd, "dock") == 0) {
2213                         if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 1))
2214                                 return -EIO;
2215                 } else
2216                         return -EINVAL;
2217         }
2218
2219         return 0;
2220 }
2221
2222 #endif /* CONFIG_THINKPAD_ACPI_DOCK */
2223
2224 /*************************************************************************
2225  * Bay subdriver
2226  */
2227
2228 #ifdef CONFIG_THINKPAD_ACPI_BAY
2229 IBM_HANDLE(bay, root, "\\_SB.PCI.IDE.SECN.MAST",        /* 570 */
2230            "\\_SB.PCI0.IDE0.IDES.IDSM", /* 600e/x, 770e, 770x */
2231            "\\_SB.PCI0.SATA.SCND.MSTR", /* T60, X60, Z60 */
2232            "\\_SB.PCI0.IDE0.SCND.MSTR", /* all others */
2233            );                           /* A21e, R30, R31 */
2234 IBM_HANDLE(bay_ej, bay, "_EJ3", /* 600e/x, A2xm/p, A3x */
2235            "_EJ0",              /* all others */
2236            );                   /* 570,A21e,G4x,R30,R31,R32,R40e,R50e */
2237 IBM_HANDLE(bay2, root, "\\_SB.PCI0.IDE0.PRIM.SLAV",     /* A3x, R32 */
2238            "\\_SB.PCI0.IDE0.IDEP.IDPS", /* 600e/x, 770e, 770x */
2239            );                           /* all others */
2240 IBM_HANDLE(bay2_ej, bay2, "_EJ3",       /* 600e/x, 770e, A3x */
2241            "_EJ0",                      /* 770x */
2242            );                           /* all others */
2243
2244 static int __init bay_init(struct ibm_init_struct *iibm)
2245 {
2246         vdbg_printk(TPACPI_DBG_INIT, "initializing bay subdriver\n");
2247
2248         IBM_ACPIHANDLE_INIT(bay);
2249         if (bay_handle)
2250                 IBM_ACPIHANDLE_INIT(bay_ej);
2251         IBM_ACPIHANDLE_INIT(bay2);
2252         if (bay2_handle)
2253                 IBM_ACPIHANDLE_INIT(bay2_ej);
2254
2255         tp_features.bay_status = bay_handle &&
2256                 acpi_evalf(bay_handle, NULL, "_STA", "qv");
2257         tp_features.bay_status2 = bay2_handle &&
2258                 acpi_evalf(bay2_handle, NULL, "_STA", "qv");
2259
2260         tp_features.bay_eject = bay_handle && bay_ej_handle &&
2261                 (strlencmp(bay_ej_path, "_EJ0") == 0 || experimental);
2262         tp_features.bay_eject2 = bay2_handle && bay2_ej_handle &&
2263                 (strlencmp(bay2_ej_path, "_EJ0") == 0 || experimental);
2264
2265         vdbg_printk(TPACPI_DBG_INIT,
2266                 "bay 1: status %s, eject %s; bay 2: status %s, eject %s\n",
2267                 str_supported(tp_features.bay_status),
2268                 str_supported(tp_features.bay_eject),
2269                 str_supported(tp_features.bay_status2),
2270                 str_supported(tp_features.bay_eject2));
2271
2272         return (tp_features.bay_status || tp_features.bay_eject ||
2273                 tp_features.bay_status2 || tp_features.bay_eject2)? 0 : 1;
2274 }
2275
2276 static void bay_notify(struct ibm_struct *ibm, u32 event)
2277 {
2278         acpi_bus_generate_event(ibm->acpi->device, event, 0);
2279 }
2280
2281 #define bay_occupied(b) (_sta(b##_handle) & 1)
2282
2283 static int bay_read(char *p)
2284 {
2285         int len = 0;
2286         int occupied = bay_occupied(bay);
2287         int occupied2 = bay_occupied(bay2);
2288         int eject, eject2;
2289
2290         len += sprintf(p + len, "status:\t\t%s\n",
2291                 tp_features.bay_status ?
2292                         (occupied ? "occupied" : "unoccupied") :
2293                                 "not supported");
2294         if (tp_features.bay_status2)
2295                 len += sprintf(p + len, "status2:\t%s\n", occupied2 ?
2296                                "occupied" : "unoccupied");
2297
2298         eject = tp_features.bay_eject && occupied;
2299         eject2 = tp_features.bay_eject2 && occupied2;
2300
2301         if (eject && eject2)
2302                 len += sprintf(p + len, "commands:\teject, eject2\n");
2303         else if (eject)
2304                 len += sprintf(p + len, "commands:\teject\n");
2305         else if (eject2)
2306                 len += sprintf(p + len, "commands:\teject2\n");
2307
2308         return len;
2309 }
2310
2311 static int bay_write(char *buf)
2312 {
2313         char *cmd;
2314
2315         if (!tp_features.bay_eject && !tp_features.bay_eject2)
2316                 return -ENODEV;
2317
2318         while ((cmd = next_cmd(&buf))) {
2319                 if (tp_features.bay_eject && strlencmp(cmd, "eject") == 0) {
2320                         if (!acpi_evalf(bay_ej_handle, NULL, NULL, "vd", 1))
2321                                 return -EIO;
2322                 } else if (tp_features.bay_eject2 &&
2323                            strlencmp(cmd, "eject2") == 0) {
2324                         if (!acpi_evalf(bay2_ej_handle, NULL, NULL, "vd", 1))
2325                                 return -EIO;
2326                 } else
2327                         return -EINVAL;
2328         }
2329
2330         return 0;
2331 }
2332
2333 static struct tp_acpi_drv_struct ibm_bay_acpidriver = {
2334         .notify = bay_notify,
2335         .handle = &bay_handle,
2336         .type = ACPI_SYSTEM_NOTIFY,
2337 };
2338
2339 static struct ibm_struct bay_driver_data = {
2340         .name = "bay",
2341         .read = bay_read,
2342         .write = bay_write,
2343         .acpi = &ibm_bay_acpidriver,
2344 };
2345
2346 #endif /* CONFIG_THINKPAD_ACPI_BAY */
2347
2348 /*************************************************************************
2349  * CMOS subdriver
2350  */
2351
2352 /* sysfs cmos_command -------------------------------------------------- */
2353 static ssize_t cmos_command_store(struct device *dev,
2354                             struct device_attribute *attr,
2355                             const char *buf, size_t count)
2356 {
2357         unsigned long cmos_cmd;
2358         int res;
2359
2360         if (parse_strtoul(buf, 21, &cmos_cmd))
2361                 return -EINVAL;
2362
2363         res = issue_thinkpad_cmos_command(cmos_cmd);
2364         return (res)? res : count;
2365 }
2366
2367 static struct device_attribute dev_attr_cmos_command =
2368         __ATTR(cmos_command, S_IWUSR, NULL, cmos_command_store);
2369
2370 /* --------------------------------------------------------------------- */
2371
2372 static int __init cmos_init(struct ibm_init_struct *iibm)
2373 {
2374         int res;
2375
2376         vdbg_printk(TPACPI_DBG_INIT,
2377                 "initializing cmos commands subdriver\n");
2378
2379         IBM_ACPIHANDLE_INIT(cmos);
2380
2381         vdbg_printk(TPACPI_DBG_INIT, "cmos commands are %s\n",
2382                 str_supported(cmos_handle != NULL));
2383
2384         res = device_create_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
2385         if (res)
2386                 return res;
2387
2388         return (cmos_handle)? 0 : 1;
2389 }
2390
2391 static void cmos_exit(void)
2392 {
2393         device_remove_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
2394 }
2395
2396 static int cmos_read(char *p)
2397 {
2398         int len = 0;
2399
2400         /* cmos not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
2401            R30, R31, T20-22, X20-21 */
2402         if (!cmos_handle)
2403                 len += sprintf(p + len, "status:\t\tnot supported\n");
2404         else {
2405                 len += sprintf(p + len, "status:\t\tsupported\n");
2406                 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-21)\n");
2407         }
2408
2409         return len;
2410 }
2411
2412 static int cmos_write(char *buf)
2413 {
2414         char *cmd;
2415         int cmos_cmd, res;
2416
2417         while ((cmd = next_cmd(&buf))) {
2418                 if (sscanf(cmd, "%u", &cmos_cmd) == 1 &&
2419                     cmos_cmd >= 0 && cmos_cmd <= 21) {
2420                         /* cmos_cmd set */
2421                 } else
2422                         return -EINVAL;
2423
2424                 res = issue_thinkpad_cmos_command(cmos_cmd);
2425                 if (res)
2426                         return res;
2427         }
2428
2429         return 0;
2430 }
2431
2432 static struct ibm_struct cmos_driver_data = {
2433         .name = "cmos",
2434         .read = cmos_read,
2435         .write = cmos_write,
2436         .exit = cmos_exit,
2437 };
2438
2439 /*************************************************************************
2440  * LED subdriver
2441  */
2442
2443 static enum led_access_mode led_supported;
2444
2445 IBM_HANDLE(led, ec, "SLED",     /* 570 */
2446            "SYSL",              /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
2447            "LED",               /* all others */
2448            );                   /* R30, R31 */
2449
2450 static int __init led_init(struct ibm_init_struct *iibm)
2451 {
2452         vdbg_printk(TPACPI_DBG_INIT, "initializing LED subdriver\n");
2453
2454         IBM_ACPIHANDLE_INIT(led);
2455
2456         if (!led_handle)
2457                 /* led not supported on R30, R31 */
2458                 led_supported = TPACPI_LED_NONE;
2459         else if (strlencmp(led_path, "SLED") == 0)
2460                 /* 570 */
2461                 led_supported = TPACPI_LED_570;
2462         else if (strlencmp(led_path, "SYSL") == 0)
2463                 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
2464                 led_supported = TPACPI_LED_OLD;
2465         else
2466                 /* all others */
2467                 led_supported = TPACPI_LED_NEW;
2468
2469         vdbg_printk(TPACPI_DBG_INIT, "LED commands are %s, mode %d\n",
2470                 str_supported(led_supported), led_supported);
2471
2472         return (led_supported != TPACPI_LED_NONE)? 0 : 1;
2473 }
2474
2475 #define led_status(s) ((s) == 0 ? "off" : ((s) == 1 ? "on" : "blinking"))
2476
2477 static int led_read(char *p)
2478 {
2479         int len = 0;
2480
2481         if (!led_supported) {
2482                 len += sprintf(p + len, "status:\t\tnot supported\n");
2483                 return len;
2484         }
2485         len += sprintf(p + len, "status:\t\tsupported\n");
2486
2487         if (led_supported == TPACPI_LED_570) {
2488                 /* 570 */
2489                 int i, status;
2490                 for (i = 0; i < 8; i++) {
2491                         if (!acpi_evalf(ec_handle,
2492                                         &status, "GLED", "dd", 1 << i))
2493                                 return -EIO;
2494                         len += sprintf(p + len, "%d:\t\t%s\n",
2495                                        i, led_status(status));
2496                 }
2497         }
2498
2499         len += sprintf(p + len, "commands:\t"
2500                        "<led> on, <led> off, <led> blink (<led> is 0-7)\n");
2501
2502         return len;
2503 }
2504
2505 /* off, on, blink */
2506 static const int led_sled_arg1[] = { 0, 1, 3 };
2507 static const int led_exp_hlbl[] = { 0, 0, 1 };  /* led# * */
2508 static const int led_exp_hlcl[] = { 0, 1, 1 };  /* led# * */
2509 static const int led_led_arg1[] = { 0, 0x80, 0xc0 };
2510
2511 static int led_write(char *buf)
2512 {
2513         char *cmd;
2514         int led, ind, ret;
2515
2516         if (!led_supported)
2517                 return -ENODEV;
2518
2519         while ((cmd = next_cmd(&buf))) {
2520                 if (sscanf(cmd, "%d", &led) != 1 || led < 0 || led > 7)
2521                         return -EINVAL;
2522
2523                 if (strstr(cmd, "off")) {
2524                         ind = 0;
2525                 } else if (strstr(cmd, "on")) {
2526                         ind = 1;
2527                 } else if (strstr(cmd, "blink")) {
2528                         ind = 2;
2529                 } else
2530                         return -EINVAL;
2531
2532                 if (led_supported == TPACPI_LED_570) {
2533                         /* 570 */
2534                         led = 1 << led;
2535                         if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
2536                                         led, led_sled_arg1[ind]))
2537                                 return -EIO;
2538                 } else if (led_supported == TPACPI_LED_OLD) {
2539                         /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */
2540                         led = 1 << led;
2541                         ret = ec_write(TPACPI_LED_EC_HLMS, led);
2542                         if (ret >= 0)
2543                                 ret =
2544                                     ec_write(TPACPI_LED_EC_HLBL,
2545                                              led * led_exp_hlbl[ind]);
2546                         if (ret >= 0)
2547                                 ret =
2548                                     ec_write(TPACPI_LED_EC_HLCL,
2549                                              led * led_exp_hlcl[ind]);
2550                         if (ret < 0)
2551                                 return ret;
2552                 } else {
2553                         /* all others */
2554                         if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
2555                                         led, led_led_arg1[ind]))
2556                                 return -EIO;
2557                 }
2558         }
2559
2560         return 0;
2561 }
2562
2563 static struct ibm_struct led_driver_data = {
2564         .name = "led",
2565         .read = led_read,
2566         .write = led_write,
2567 };
2568
2569 /*************************************************************************
2570  * Beep subdriver
2571  */
2572
2573 IBM_HANDLE(beep, ec, "BEEP");   /* all except R30, R31 */
2574
2575 static int __init beep_init(struct ibm_init_struct *iibm)
2576 {
2577         vdbg_printk(TPACPI_DBG_INIT, "initializing beep subdriver\n");
2578
2579         IBM_ACPIHANDLE_INIT(beep);
2580
2581         vdbg_printk(TPACPI_DBG_INIT, "beep is %s\n",
2582                 str_supported(beep_handle != NULL));
2583
2584         return (beep_handle)? 0 : 1;
2585 }
2586
2587 static int beep_read(char *p)
2588 {
2589         int len = 0;
2590
2591         if (!beep_handle)
2592                 len += sprintf(p + len, "status:\t\tnot supported\n");
2593         else {
2594                 len += sprintf(p + len, "status:\t\tsupported\n");
2595                 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-17)\n");
2596         }
2597
2598         return len;
2599 }
2600
2601 static int beep_write(char *buf)
2602 {
2603         char *cmd;
2604         int beep_cmd;
2605
2606         if (!beep_handle)
2607                 return -ENODEV;
2608
2609         while ((cmd = next_cmd(&buf))) {
2610                 if (sscanf(cmd, "%u", &beep_cmd) == 1 &&
2611                     beep_cmd >= 0 && beep_cmd <= 17) {
2612                         /* beep_cmd set */
2613                 } else
2614                         return -EINVAL;
2615                 if (!acpi_evalf(beep_handle, NULL, NULL, "vdd", beep_cmd, 0))
2616                         return -EIO;
2617         }
2618
2619         return 0;
2620 }
2621
2622 static struct ibm_struct beep_driver_data = {
2623         .name = "beep",
2624         .read = beep_read,
2625         .write = beep_write,
2626 };
2627
2628 /*************************************************************************
2629  * Thermal subdriver
2630  */
2631
2632 static enum thermal_access_mode thermal_read_mode;
2633
2634 /* sysfs temp##_input -------------------------------------------------- */
2635
2636 static ssize_t thermal_temp_input_show(struct device *dev,
2637                            struct device_attribute *attr,
2638                            char *buf)
2639 {
2640         struct sensor_device_attribute *sensor_attr =
2641                                         to_sensor_dev_attr(attr);
2642         int idx = sensor_attr->index;
2643         s32 value;
2644         int res;
2645
2646         res = thermal_get_sensor(idx, &value);
2647         if (res)
2648                 return res;
2649         if (value == TP_EC_THERMAL_TMP_NA * 1000)
2650                 return -ENXIO;
2651
2652         return snprintf(buf, PAGE_SIZE, "%d\n", value);
2653 }
2654
2655 #define THERMAL_SENSOR_ATTR_TEMP(_idxA, _idxB) \
2656          SENSOR_ATTR(temp##_idxA##_input, S_IRUGO, thermal_temp_input_show, NULL, _idxB)
2657
2658 static struct sensor_device_attribute sensor_dev_attr_thermal_temp_input[] = {
2659         THERMAL_SENSOR_ATTR_TEMP(1, 0),
2660         THERMAL_SENSOR_ATTR_TEMP(2, 1),
2661         THERMAL_SENSOR_ATTR_TEMP(3, 2),
2662         THERMAL_SENSOR_ATTR_TEMP(4, 3),
2663         THERMAL_SENSOR_ATTR_TEMP(5, 4),
2664         THERMAL_SENSOR_ATTR_TEMP(6, 5),
2665         THERMAL_SENSOR_ATTR_TEMP(7, 6),
2666         THERMAL_SENSOR_ATTR_TEMP(8, 7),
2667         THERMAL_SENSOR_ATTR_TEMP(9, 8),
2668         THERMAL_SENSOR_ATTR_TEMP(10, 9),
2669         THERMAL_SENSOR_ATTR_TEMP(11, 10),
2670         THERMAL_SENSOR_ATTR_TEMP(12, 11),
2671         THERMAL_SENSOR_ATTR_TEMP(13, 12),
2672         THERMAL_SENSOR_ATTR_TEMP(14, 13),
2673         THERMAL_SENSOR_ATTR_TEMP(15, 14),
2674         THERMAL_SENSOR_ATTR_TEMP(16, 15),
2675 };
2676
2677 #define THERMAL_ATTRS(X) \
2678         &sensor_dev_attr_thermal_temp_input[X].dev_attr.attr
2679
2680 static struct attribute *thermal_temp_input_attr[] = {
2681         THERMAL_ATTRS(8),
2682         THERMAL_ATTRS(9),
2683         THERMAL_ATTRS(10),
2684         THERMAL_ATTRS(11),
2685         THERMAL_ATTRS(12),
2686         THERMAL_ATTRS(13),
2687         THERMAL_ATTRS(14),
2688         THERMAL_ATTRS(15),
2689         THERMAL_ATTRS(0),
2690         THERMAL_ATTRS(1),
2691         THERMAL_ATTRS(2),
2692         THERMAL_ATTRS(3),
2693         THERMAL_ATTRS(4),
2694         THERMAL_ATTRS(5),
2695         THERMAL_ATTRS(6),
2696         THERMAL_ATTRS(7),
2697         NULL
2698 };
2699
2700 static const struct attribute_group thermal_temp_input16_group = {
2701         .attrs = thermal_temp_input_attr
2702 };
2703
2704 static const struct attribute_group thermal_temp_input8_group = {
2705         .attrs = &thermal_temp_input_attr[8]
2706 };
2707
2708 #undef THERMAL_SENSOR_ATTR_TEMP
2709 #undef THERMAL_ATTRS
2710
2711 /* --------------------------------------------------------------------- */
2712
2713 static int __init thermal_init(struct ibm_init_struct *iibm)
2714 {
2715         u8 t, ta1, ta2;
2716         int i;
2717         int acpi_tmp7;
2718         int res;
2719
2720         vdbg_printk(TPACPI_DBG_INIT, "initializing thermal subdriver\n");
2721
2722         acpi_tmp7 = acpi_evalf(ec_handle, NULL, "TMP7", "qv");
2723
2724         if (thinkpad_id.ec_model) {
2725                 /*
2726                  * Direct EC access mode: sensors at registers
2727                  * 0x78-0x7F, 0xC0-0xC7.  Registers return 0x00 for
2728                  * non-implemented, thermal sensors return 0x80 when
2729                  * not available
2730                  */
2731
2732                 ta1 = ta2 = 0;
2733                 for (i = 0; i < 8; i++) {
2734                         if (acpi_ec_read(TP_EC_THERMAL_TMP0 + i, &t)) {
2735                                 ta1 |= t;
2736                         } else {
2737                                 ta1 = 0;
2738                                 break;
2739                         }
2740                         if (acpi_ec_read(TP_EC_THERMAL_TMP8 + i, &t)) {
2741                                 ta2 |= t;
2742                         } else {
2743                                 ta1 = 0;
2744                                 break;
2745                         }
2746                 }
2747                 if (ta1 == 0) {
2748                         /* This is sheer paranoia, but we handle it anyway */
2749                         if (acpi_tmp7) {
2750                                 printk(IBM_ERR
2751                                        "ThinkPad ACPI EC access misbehaving, "
2752                                        "falling back to ACPI TMPx access mode\n");
2753                                 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
2754                         } else {
2755                                 printk(IBM_ERR
2756                                        "ThinkPad ACPI EC access misbehaving, "
2757                                        "disabling thermal sensors access\n");
2758                                 thermal_read_mode = TPACPI_THERMAL_NONE;
2759                         }
2760                 } else {
2761                         thermal_read_mode =
2762                             (ta2 != 0) ?
2763                             TPACPI_THERMAL_TPEC_16 : TPACPI_THERMAL_TPEC_8;
2764                 }
2765         } else if (acpi_tmp7) {
2766                 if (acpi_evalf(ec_handle, NULL, "UPDT", "qv")) {
2767                         /* 600e/x, 770e, 770x */
2768                         thermal_read_mode = TPACPI_THERMAL_ACPI_UPDT;
2769                 } else {
2770                         /* Standard ACPI TMPx access, max 8 sensors */
2771                         thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
2772                 }
2773         } else {
2774                 /* temperatures not supported on 570, G4x, R30, R31, R32 */
2775                 thermal_read_mode = TPACPI_THERMAL_NONE;
2776         }
2777
2778         vdbg_printk(TPACPI_DBG_INIT, "thermal is %s, mode %d\n",
2779                 str_supported(thermal_read_mode != TPACPI_THERMAL_NONE),
2780                 thermal_read_mode);
2781
2782         switch(thermal_read_mode) {
2783         case TPACPI_THERMAL_TPEC_16:
2784                 res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
2785                                 &thermal_temp_input16_group);
2786                 if (res)
2787                         return res;
2788                 break;
2789         case TPACPI_THERMAL_TPEC_8:
2790         case TPACPI_THERMAL_ACPI_TMP07:
2791         case TPACPI_THERMAL_ACPI_UPDT:
2792                 res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
2793                                 &thermal_temp_input8_group);
2794                 if (res)
2795                         return res;
2796                 break;
2797         case TPACPI_THERMAL_NONE:
2798         default:
2799                 return 1;
2800         }
2801
2802         return 0;
2803 }
2804
2805 static void thermal_exit(void)
2806 {
2807         switch(thermal_read_mode) {
2808         case TPACPI_THERMAL_TPEC_16:
2809                 sysfs_remove_group(&tpacpi_pdev->dev.kobj,
2810                                    &thermal_temp_input16_group);
2811                 break;
2812         case TPACPI_THERMAL_TPEC_8:
2813         case TPACPI_THERMAL_ACPI_TMP07:
2814         case TPACPI_THERMAL_ACPI_UPDT:
2815                 sysfs_remove_group(&tpacpi_pdev->dev.kobj,
2816                                    &thermal_temp_input16_group);
2817                 break;
2818         case TPACPI_THERMAL_NONE:
2819         default:
2820                 break;
2821         }
2822 }
2823
2824 /* idx is zero-based */
2825 static int thermal_get_sensor(int idx, s32 *value)
2826 {
2827         int t;
2828         s8 tmp;
2829         char tmpi[5];
2830
2831         t = TP_EC_THERMAL_TMP0;
2832
2833         switch (thermal_read_mode) {
2834 #if TPACPI_MAX_THERMAL_SENSORS >= 16
2835         case TPACPI_THERMAL_TPEC_16:
2836                 if (idx >= 8 && idx <= 15) {
2837                         t = TP_EC_THERMAL_TMP8;
2838                         idx -= 8;
2839                 }
2840                 /* fallthrough */
2841 #endif
2842         case TPACPI_THERMAL_TPEC_8:
2843                 if (idx <= 7) {
2844                         if (!acpi_ec_read(t + idx, &tmp))
2845                                 return -EIO;
2846                         *value = tmp * 1000;
2847                         return 0;
2848                 }
2849                 break;
2850
2851         case TPACPI_THERMAL_ACPI_UPDT:
2852                 if (idx <= 7) {
2853                         snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
2854                         if (!acpi_evalf(ec_handle, NULL, "UPDT", "v"))
2855                                 return -EIO;
2856                         if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
2857                                 return -EIO;
2858                         *value = (t - 2732) * 100;
2859                         return 0;
2860                 }
2861                 break;
2862
2863         case TPACPI_THERMAL_ACPI_TMP07:
2864                 if (idx <= 7) {
2865                         snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
2866                         if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
2867                                 return -EIO;
2868                         if (t > 127 || t < -127)
2869                                 t = TP_EC_THERMAL_TMP_NA;
2870                         *value = t * 1000;
2871                         return 0;
2872                 }
2873                 break;
2874
2875         case TPACPI_THERMAL_NONE:
2876         default:
2877                 return -ENOSYS;
2878         }
2879
2880         return -EINVAL;
2881 }
2882
2883 static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s)
2884 {
2885         int res, i;
2886         int n;
2887
2888         n = 8;
2889         i = 0;
2890
2891         if (!s)
2892                 return -EINVAL;
2893
2894         if (thermal_read_mode == TPACPI_THERMAL_TPEC_16)
2895                 n = 16;
2896
2897         for(i = 0 ; i < n; i++) {
2898                 res = thermal_get_sensor(i, &s->temp[i]);
2899                 if (res)
2900                         return res;
2901         }
2902
2903         return n;
2904 }
2905
2906 static int thermal_read(char *p)
2907 {
2908         int len = 0;
2909         int n, i;
2910         struct ibm_thermal_sensors_struct t;
2911
2912         n = thermal_get_sensors(&t);
2913         if (unlikely(n < 0))
2914                 return n;
2915
2916         len += sprintf(p + len, "temperatures:\t");
2917
2918         if (n > 0) {
2919                 for (i = 0; i < (n - 1); i++)
2920                         len += sprintf(p + len, "%d ", t.temp[i] / 1000);
2921                 len += sprintf(p + len, "%d\n", t.temp[i] / 1000);
2922         } else
2923                 len += sprintf(p + len, "not supported\n");
2924
2925         return len;
2926 }
2927
2928 static struct ibm_struct thermal_driver_data = {
2929         .name = "thermal",
2930         .read = thermal_read,
2931         .exit = thermal_exit,
2932 };
2933
2934 /*************************************************************************
2935  * EC Dump subdriver
2936  */
2937
2938 static u8 ecdump_regs[256];
2939
2940 static int ecdump_read(char *p)
2941 {
2942         int len = 0;
2943         int i, j;
2944         u8 v;
2945
2946         len += sprintf(p + len, "EC      "
2947                        " +00 +01 +02 +03 +04 +05 +06 +07"
2948                        " +08 +09 +0a +0b +0c +0d +0e +0f\n");
2949         for (i = 0; i < 256; i += 16) {
2950                 len += sprintf(p + len, "EC 0x%02x:", i);
2951                 for (j = 0; j < 16; j++) {
2952                         if (!acpi_ec_read(i + j, &v))
2953                                 break;
2954                         if (v != ecdump_regs[i + j])
2955                                 len += sprintf(p + len, " *%02x", v);
2956                         else
2957                                 len += sprintf(p + len, "  %02x", v);
2958                         ecdump_regs[i + j] = v;
2959                 }
2960                 len += sprintf(p + len, "\n");
2961                 if (j != 16)
2962                         break;
2963         }
2964
2965         /* These are way too dangerous to advertise openly... */
2966 #if 0
2967         len += sprintf(p + len, "commands:\t0x<offset> 0x<value>"
2968                        " (<offset> is 00-ff, <value> is 00-ff)\n");
2969         len += sprintf(p + len, "commands:\t0x<offset> <value>  "
2970                        " (<offset> is 00-ff, <value> is 0-255)\n");
2971 #endif
2972         return len;
2973 }
2974
2975 static int ecdump_write(char *buf)
2976 {
2977         char *cmd;
2978         int i, v;
2979
2980         while ((cmd = next_cmd(&buf))) {
2981                 if (sscanf(cmd, "0x%x 0x%x", &i, &v) == 2) {
2982                         /* i and v set */
2983                 } else if (sscanf(cmd, "0x%x %u", &i, &v) == 2) {
2984                         /* i and v set */
2985                 } else
2986                         return -EINVAL;
2987                 if (i >= 0 && i < 256 && v >= 0 && v < 256) {
2988                         if (!acpi_ec_write(i, v))
2989                                 return -EIO;
2990                 } else
2991                         return -EINVAL;
2992         }
2993
2994         return 0;
2995 }
2996
2997 static struct ibm_struct ecdump_driver_data = {
2998         .name = "ecdump",
2999         .read = ecdump_read,
3000         .write = ecdump_write,
3001         .flags.experimental = 1,
3002 };
3003
3004 /*************************************************************************
3005  * Backlight/brightness subdriver
3006  */
3007
3008 static struct backlight_device *ibm_backlight_device;
3009
3010 static struct backlight_ops ibm_backlight_data = {
3011         .get_brightness = brightness_get,
3012         .update_status  = brightness_update_status,
3013 };
3014
3015 static struct mutex brightness_mutex;
3016
3017 static int __init brightness_init(struct ibm_init_struct *iibm)
3018 {
3019         int b;
3020
3021         vdbg_printk(TPACPI_DBG_INIT, "initializing brightness subdriver\n");
3022
3023         mutex_init(&brightness_mutex);
3024
3025         if (!brightness_mode) {
3026                 if (thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO)
3027                         brightness_mode = 2;
3028                 else
3029                         brightness_mode = 3;
3030
3031                 dbg_printk(TPACPI_DBG_INIT, "selected brightness_mode=%d\n",
3032                         brightness_mode);
3033         }
3034
3035         if (brightness_mode > 3)
3036                 return -EINVAL;
3037
3038         b = brightness_get(NULL);
3039         if (b < 0)
3040                 return 1;
3041
3042         ibm_backlight_device = backlight_device_register(
3043                                         TPACPI_BACKLIGHT_DEV_NAME, NULL, NULL,
3044                                         &ibm_backlight_data);
3045         if (IS_ERR(ibm_backlight_device)) {
3046                 printk(IBM_ERR "Could not register backlight device\n");
3047                 return PTR_ERR(ibm_backlight_device);
3048         }
3049         vdbg_printk(TPACPI_DBG_INIT, "brightness is supported\n");
3050
3051         ibm_backlight_device->props.max_brightness = 7;
3052         ibm_backlight_device->props.brightness = b;
3053         backlight_update_status(ibm_backlight_device);
3054
3055         return 0;
3056 }
3057
3058 static void brightness_exit(void)
3059 {
3060         if (ibm_backlight_device) {
3061                 vdbg_printk(TPACPI_DBG_EXIT,
3062                             "calling backlight_device_unregister()\n");
3063                 backlight_device_unregister(ibm_backlight_device);
3064                 ibm_backlight_device = NULL;
3065         }
3066 }
3067
3068 static int brightness_update_status(struct backlight_device *bd)
3069 {
3070         return brightness_set(
3071                 (bd->props.fb_blank == FB_BLANK_UNBLANK &&
3072                  bd->props.power == FB_BLANK_UNBLANK) ?
3073                                 bd->props.brightness : 0);
3074 }
3075
3076 /*
3077  * ThinkPads can read brightness from two places: EC 0x31, or
3078  * CMOS NVRAM byte 0x5E, bits 0-3.
3079  */
3080 static int brightness_get(struct backlight_device *bd)
3081 {
3082         u8 lec = 0, lcmos = 0, level = 0;
3083
3084         if (brightness_mode & 1) {
3085                 if (!acpi_ec_read(brightness_offset, &lec))
3086                         return -EIO;
3087                 lec &= 7;
3088                 level = lec;
3089         };
3090         if (brightness_mode & 2) {
3091                 lcmos = (nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS)
3092                          & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
3093                         >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
3094                 level = lcmos;
3095         }
3096
3097         if (brightness_mode == 3 && lec != lcmos) {
3098                 printk(IBM_ERR
3099                         "CMOS NVRAM (%u) and EC (%u) do not agree "
3100                         "on display brightness level\n",
3101                         (unsigned int) lcmos,
3102                         (unsigned int) lec);
3103                 return -EIO;
3104         }
3105
3106         return level;
3107 }
3108
3109 static int brightness_set(int value)
3110 {
3111         int cmos_cmd, inc, i, res;
3112         int current_value;
3113
3114         if (value > 7)
3115                 return -EINVAL;
3116
3117         res = mutex_lock_interruptible(&brightness_mutex);
3118         if (res < 0)
3119                 return res;
3120
3121         current_value = brightness_get(NULL);
3122         if (current_value < 0) {
3123                 res = current_value;
3124                 goto errout;
3125         }
3126
3127         cmos_cmd = value > current_value ?
3128                         TP_CMOS_BRIGHTNESS_UP :
3129                         TP_CMOS_BRIGHTNESS_DOWN;
3130         inc = value > current_value ? 1 : -1;
3131
3132         res = 0;
3133         for (i = current_value; i != value; i += inc) {
3134                 if ((brightness_mode & 2) &&
3135                     issue_thinkpad_cmos_command(cmos_cmd)) {
3136                         res = -EIO;
3137                         goto errout;
3138                 }
3139                 if ((brightness_mode & 1) &&
3140                     !acpi_ec_write(brightness_offset, i + inc)) {
3141                         res = -EIO;
3142                         goto errout;;
3143                 }
3144         }
3145
3146 errout:
3147         mutex_unlock(&brightness_mutex);
3148         return res;
3149 }
3150
3151 static int brightness_read(char *p)
3152 {
3153         int len = 0;
3154         int level;
3155
3156         if ((level = brightness_get(NULL)) < 0) {
3157                 len += sprintf(p + len, "level:\t\tunreadable\n");
3158         } else {
3159                 len += sprintf(p + len, "level:\t\t%d\n", level & 0x7);
3160                 len += sprintf(p + len, "commands:\tup, down\n");
3161                 len += sprintf(p + len, "commands:\tlevel <level>"
3162                                " (<level> is 0-7)\n");
3163         }
3164
3165         return len;
3166 }
3167
3168 static int brightness_write(char *buf)
3169 {
3170         int level;
3171         int new_level;
3172         char *cmd;
3173
3174         while ((cmd = next_cmd(&buf))) {
3175                 if ((level = brightness_get(NULL)) < 0)
3176                         return level;
3177                 level &= 7;
3178
3179                 if (strlencmp(cmd, "up") == 0) {
3180                         new_level = level == 7 ? 7 : level + 1;
3181                 } else if (strlencmp(cmd, "down") == 0) {
3182                         new_level = level == 0 ? 0 : level - 1;
3183                 } else if (sscanf(cmd, "level %d", &new_level) == 1 &&
3184                            new_level >= 0 && new_level <= 7) {
3185                         /* new_level set */
3186                 } else
3187                         return -EINVAL;
3188
3189                 brightness_set(new_level);
3190         }
3191
3192         return 0;
3193 }
3194
3195 static struct ibm_struct brightness_driver_data = {
3196         .name = "brightness",
3197         .read = brightness_read,
3198         .write = brightness_write,
3199         .exit = brightness_exit,
3200 };
3201
3202 /*************************************************************************
3203  * Volume subdriver
3204  */
3205
3206 static int volume_read(char *p)
3207 {
3208         int len = 0;
3209         u8 level;
3210
3211         if (!acpi_ec_read(volume_offset, &level)) {
3212                 len += sprintf(p + len, "level:\t\tunreadable\n");
3213         } else {
3214                 len += sprintf(p + len, "level:\t\t%d\n", level & 0xf);
3215                 len += sprintf(p + len, "mute:\t\t%s\n", onoff(level, 6));
3216                 len += sprintf(p + len, "commands:\tup, down, mute\n");
3217                 len += sprintf(p + len, "commands:\tlevel <level>"
3218                                " (<level> is 0-15)\n");
3219         }
3220
3221         return len;
3222 }
3223
3224 static int volume_write(char *buf)
3225 {
3226         int cmos_cmd, inc, i;
3227         u8 level, mute;
3228         int new_level, new_mute;
3229         char *cmd;
3230
3231         while ((cmd = next_cmd(&buf))) {
3232                 if (!acpi_ec_read(volume_offset, &level))
3233                         return -EIO;
3234                 new_mute = mute = level & 0x40;
3235                 new_level = level = level & 0xf;
3236
3237                 if (strlencmp(cmd, "up") == 0) {
3238                         if (mute)
3239                                 new_mute = 0;
3240                         else
3241                                 new_level = level == 15 ? 15 : level + 1;
3242                 } else if (strlencmp(cmd, "down") == 0) {
3243                         if (mute)
3244                                 new_mute = 0;
3245                         else
3246                                 new_level = level == 0 ? 0 : level - 1;
3247                 } else if (sscanf(cmd, "level %d", &new_level) == 1 &&
3248                            new_level >= 0 && new_level <= 15) {
3249                         /* new_level set */
3250                 } else if (strlencmp(cmd, "mute") == 0) {
3251                         new_mute = 0x40;
3252                 } else
3253                         return -EINVAL;
3254
3255                 if (new_level != level) {       /* mute doesn't change */
3256                         cmos_cmd = new_level > level ? TP_CMOS_VOLUME_UP : TP_CMOS_VOLUME_DOWN;
3257                         inc = new_level > level ? 1 : -1;
3258
3259                         if (mute && (issue_thinkpad_cmos_command(cmos_cmd) ||
3260                                      !acpi_ec_write(volume_offset, level)))
3261                                 return -EIO;
3262
3263                         for (i = level; i != new_level; i += inc)
3264                                 if (issue_thinkpad_cmos_command(cmos_cmd) ||
3265                                     !acpi_ec_write(volume_offset, i + inc))
3266                                         return -EIO;
3267
3268                         if (mute && (issue_thinkpad_cmos_command(TP_CMOS_VOLUME_MUTE) ||
3269                                      !acpi_ec_write(volume_offset,
3270                                                     new_level + mute)))
3271                                 return -EIO;
3272                 }
3273
3274                 if (new_mute != mute) { /* level doesn't change */
3275                         cmos_cmd = new_mute ? TP_CMOS_VOLUME_MUTE : TP_CMOS_VOLUME_UP;
3276
3277                         if (issue_thinkpad_cmos_command(cmos_cmd) ||
3278                             !acpi_ec_write(volume_offset, level + new_mute))
3279                                 return -EIO;
3280                 }
3281         }