ACPI: Remove unnecessary from/to-void* and to-void casts in drivers/acpi
[linux-2.6.git] / drivers / acpi / ibm_acpi.c
1 /*
2  *  ibm_acpi.c - IBM ThinkPad ACPI Extras
3  *
4  *
5  *  Copyright (C) 2004-2005 Borislav Deianov <borislav@users.sf.net>
6  *
7  *  This program is free software; you can redistribute it and/or modify
8  *  it under the terms of the GNU General Public License as published by
9  *  the Free Software Foundation; either version 2 of the License, or
10  *  (at your option) any later version.
11  *
12  *  This program is distributed in the hope that it will be useful,
13  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
14  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15  *  GNU General Public License for more details.
16  *
17  *  You should have received a copy of the GNU General Public License
18  *  along with this program; if not, write to the Free Software
19  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
20  */
21
22 #define IBM_VERSION "0.12a"
23
24 /*
25  *  Changelog:
26  *  
27  *  2005-08-17  0.12    fix compilation on 2.6.13-rc kernels
28  *  2005-03-17  0.11    support for 600e, 770x
29  *                          thanks to Jamie Lentin <lentinj@dial.pipex.com>
30  *                      support for 770e, G41
31  *                      G40 and G41 don't have a thinklight
32  *                      temperatures no longer experimental
33  *                      experimental brightness control
34  *                      experimental volume control
35  *                      experimental fan enable/disable
36  *  2005-01-16  0.10    fix module loading on R30, R31 
37  *  2005-01-16  0.9     support for 570, R30, R31
38  *                      ultrabay support on A22p, A3x
39  *                      limit arg for cmos, led, beep, drop experimental status
40  *                      more capable led control on A21e, A22p, T20-22, X20
41  *                      experimental temperatures and fan speed
42  *                      experimental embedded controller register dump
43  *                      mark more functions as __init, drop incorrect __exit
44  *                      use MODULE_VERSION
45  *                          thanks to Henrik Brix Andersen <brix@gentoo.org>
46  *                      fix parameter passing on module loading
47  *                          thanks to Rusty Russell <rusty@rustcorp.com.au>
48  *                          thanks to Jim Radford <radford@blackbean.org>
49  *  2004-11-08  0.8     fix init error case, don't return from a macro
50  *                          thanks to Chris Wright <chrisw@osdl.org>
51  *  2004-10-23  0.7     fix module loading on A21e, A22p, T20, T21, X20
52  *                      fix led control on A21e
53  *  2004-10-19  0.6     use acpi_bus_register_driver() to claim HKEY device
54  *  2004-10-18  0.5     thinklight support on A21e, G40, R32, T20, T21, X20
55  *                      proc file format changed
56  *                      video_switch command
57  *                      experimental cmos control
58  *                      experimental led control
59  *                      experimental acpi sounds
60  *  2004-09-16  0.4     support for module parameters
61  *                      hotkey mask can be prefixed by 0x
62  *                      video output switching
63  *                      video expansion control
64  *                      ultrabay eject support
65  *                      removed lcd brightness/on/off control, didn't work
66  *  2004-08-17  0.3     support for R40
67  *                      lcd off, brightness control
68  *                      thinklight on/off
69  *  2004-08-14  0.2     support for T series, X20
70  *                      bluetooth enable/disable
71  *                      hotkey events disabled by default
72  *                      removed fan control, currently useless
73  *  2004-08-09  0.1     initial release, support for X series
74  */
75
76 #include <linux/kernel.h>
77 #include <linux/module.h>
78 #include <linux/init.h>
79 #include <linux/types.h>
80 #include <linux/proc_fs.h>
81 #include <asm/uaccess.h>
82
83 #include <acpi/acpi_drivers.h>
84 #include <acpi/acnamesp.h>
85
86 #define IBM_NAME "ibm"
87 #define IBM_DESC "IBM ThinkPad ACPI Extras"
88 #define IBM_FILE "ibm_acpi"
89 #define IBM_URL "http://ibm-acpi.sf.net/"
90
91 MODULE_AUTHOR("Borislav Deianov");
92 MODULE_DESCRIPTION(IBM_DESC);
93 MODULE_VERSION(IBM_VERSION);
94 MODULE_LICENSE("GPL");
95
96 #define IBM_DIR IBM_NAME
97
98 #define IBM_LOG IBM_FILE ": "
99 #define IBM_ERR    KERN_ERR    IBM_LOG
100 #define IBM_NOTICE KERN_NOTICE IBM_LOG
101 #define IBM_INFO   KERN_INFO   IBM_LOG
102 #define IBM_DEBUG  KERN_DEBUG  IBM_LOG
103
104 #define IBM_MAX_ACPI_ARGS 3
105
106 #define __unused __attribute__ ((unused))
107
108 static int experimental;
109 module_param(experimental, int, 0);
110
111 static acpi_handle root_handle = NULL;
112
113 #define IBM_HANDLE(object, parent, paths...)                    \
114         static acpi_handle  object##_handle;                    \
115         static acpi_handle *object##_parent = &parent##_handle; \
116         static char        *object##_path;                      \
117         static char        *object##_paths[] = { paths }
118
119 /*
120  * The following models are supported to various degrees:
121  *
122  * 570, 600e, 600x, 770e, 770x
123  * A20m, A21e, A21m, A21p, A22p, A30, A30p, A31, A31p
124  * G40, G41
125  * R30, R31, R32, R40, R40e, R50, R50e, R50p, R51
126  * T20, T21, T22, T23, T30, T40, T40p, T41, T41p, T42, T42p, T43
127  * X20, X21, X22, X23, X24, X30, X31, X40
128  *
129  * The following models have no supported features:
130  *
131  * 240, 240x, i1400
132  *
133  * Still missing DSDTs for the following models:
134  *
135  * A20p, A22e, A22m
136  * R52
137  * S31
138  * T43p
139  */
140
141 IBM_HANDLE(ec, root, "\\_SB.PCI0.ISA.EC0",      /* 240, 240x */
142            "\\_SB.PCI.ISA.EC",  /* 570 */
143            "\\_SB.PCI0.ISA0.EC0",       /* 600e/x, 770e, 770x */
144            "\\_SB.PCI0.ISA.EC", /* A21e, A2xm/p, T20-22, X20-21 */
145            "\\_SB.PCI0.AD4S.EC0",       /* i1400, R30 */
146            "\\_SB.PCI0.ICH3.EC0",       /* R31 */
147            "\\_SB.PCI0.LPC.EC", /* all others */
148     );
149
150 IBM_HANDLE(vid, root, "\\_SB.PCI.AGP.VGA",      /* 570 */
151            "\\_SB.PCI0.AGP0.VID0",      /* 600e/x, 770x */
152            "\\_SB.PCI0.VID0",   /* 770e */
153            "\\_SB.PCI0.VID",    /* A21e, G4x, R50e, X30, X40 */
154            "\\_SB.PCI0.AGP.VID",        /* all others */
155     );                          /* R30, R31 */
156
157 IBM_HANDLE(vid2, root, "\\_SB.PCI0.AGPB.VID");  /* G41 */
158
159 IBM_HANDLE(cmos, root, "\\UCMS",        /* R50, R50e, R50p, R51, T4x, X31, X40 */
160            "\\CMOS",            /* A3x, G4x, R32, T23, T30, X22-24, X30 */
161            "\\CMS",             /* R40, R40e */
162     );                          /* all others */
163 #ifdef CONFIG_ACPI_IBM_DOCK
164 IBM_HANDLE(dock, root, "\\_SB.GDCK",    /* X30, X31, X40 */
165            "\\_SB.PCI0.DOCK",   /* 600e/x,770e,770x,A2xm/p,T20-22,X20-21 */
166            "\\_SB.PCI0.PCI1.DOCK",      /* all others */
167            "\\_SB.PCI.ISA.SLCE",        /* 570 */
168     );                          /* A21e,G4x,R30,R31,R32,R40,R40e,R50e */
169 #endif
170 IBM_HANDLE(bay, root, "\\_SB.PCI.IDE.SECN.MAST",        /* 570 */
171            "\\_SB.PCI0.IDE0.IDES.IDSM", /* 600e/x, 770e, 770x */
172            "\\_SB.PCI0.IDE0.SCND.MSTR", /* all others */
173     );                          /* A21e, R30, R31 */
174
175 IBM_HANDLE(bay_ej, bay, "_EJ3", /* 600e/x, A2xm/p, A3x */
176            "_EJ0",              /* all others */
177     );                          /* 570,A21e,G4x,R30,R31,R32,R40e,R50e */
178
179 IBM_HANDLE(bay2, root, "\\_SB.PCI0.IDE0.PRIM.SLAV",     /* A3x, R32 */
180            "\\_SB.PCI0.IDE0.IDEP.IDPS", /* 600e/x, 770e, 770x */
181     );                          /* all others */
182
183 IBM_HANDLE(bay2_ej, bay2, "_EJ3",       /* 600e/x, 770e, A3x */
184            "_EJ0",              /* 770x */
185     );                          /* all others */
186
187 /* don't list other alternatives as we install a notify handler on the 570 */
188 IBM_HANDLE(pci, root, "\\_SB.PCI");     /* 570 */
189
190 IBM_HANDLE(hkey, ec, "\\_SB.HKEY",      /* 600e/x, 770e, 770x */
191            "^HKEY",             /* R30, R31 */
192            "HKEY",              /* all others */
193     );                          /* 570 */
194
195 IBM_HANDLE(lght, root, "\\LGHT");       /* A21e, A2xm/p, T20-22, X20-21 */
196 IBM_HANDLE(ledb, ec, "LEDB");   /* G4x */
197
198 IBM_HANDLE(led, ec, "SLED",     /* 570 */
199            "SYSL",              /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
200            "LED",               /* all others */
201     );                          /* R30, R31 */
202
203 IBM_HANDLE(beep, ec, "BEEP");   /* all except R30, R31 */
204 IBM_HANDLE(ecrd, ec, "ECRD");   /* 570 */
205 IBM_HANDLE(ecwr, ec, "ECWR");   /* 570 */
206 IBM_HANDLE(fans, ec, "FANS");   /* X31, X40 */
207
208 IBM_HANDLE(gfan, ec, "GFAN",    /* 570 */
209            "\\FSPD",            /* 600e/x, 770e, 770x */
210     );                          /* all others */
211
212 IBM_HANDLE(sfan, ec, "SFAN",    /* 570 */
213            "JFNS",              /* 770x-JL */
214     );                          /* all others */
215
216 #define IBM_HKEY_HID    "IBM0068"
217 #define IBM_PCI_HID     "PNP0A03"
218
219 struct ibm_struct {
220         char *name;
221         char param[32];
222
223         char *hid;
224         struct acpi_driver *driver;
225
226         int (*init) (void);
227         int (*read) (char *);
228         int (*write) (char *);
229         void (*exit) (void);
230
231         void (*notify) (struct ibm_struct *, u32);
232         acpi_handle *handle;
233         int type;
234         struct acpi_device *device;
235
236         int driver_registered;
237         int proc_created;
238         int init_called;
239         int notify_installed;
240
241         int experimental;
242 };
243
244 static struct proc_dir_entry *proc_dir = NULL;
245
246 #define onoff(status,bit) ((status) & (1 << (bit)) ? "on" : "off")
247 #define enabled(status,bit) ((status) & (1 << (bit)) ? "enabled" : "disabled")
248 #define strlencmp(a,b) (strncmp((a), (b), strlen(b)))
249
250 static int acpi_evalf(acpi_handle handle,
251                       void *res, char *method, char *fmt, ...)
252 {
253         char *fmt0 = fmt;
254         struct acpi_object_list params;
255         union acpi_object in_objs[IBM_MAX_ACPI_ARGS];
256         struct acpi_buffer result, *resultp;
257         union acpi_object out_obj;
258         acpi_status status;
259         va_list ap;
260         char res_type;
261         int success;
262         int quiet;
263
264         if (!*fmt) {
265                 printk(IBM_ERR "acpi_evalf() called with empty format\n");
266                 return 0;
267         }
268
269         if (*fmt == 'q') {
270                 quiet = 1;
271                 fmt++;
272         } else
273                 quiet = 0;
274
275         res_type = *(fmt++);
276
277         params.count = 0;
278         params.pointer = &in_objs[0];
279
280         va_start(ap, fmt);
281         while (*fmt) {
282                 char c = *(fmt++);
283                 switch (c) {
284                 case 'd':       /* int */
285                         in_objs[params.count].integer.value = va_arg(ap, int);
286                         in_objs[params.count++].type = ACPI_TYPE_INTEGER;
287                         break;
288                         /* add more types as needed */
289                 default:
290                         printk(IBM_ERR "acpi_evalf() called "
291                                "with invalid format character '%c'\n", c);
292                         return 0;
293                 }
294         }
295         va_end(ap);
296
297         if (res_type != 'v') {
298                 result.length = sizeof(out_obj);
299                 result.pointer = &out_obj;
300                 resultp = &result;
301         } else
302                 resultp = NULL;
303
304         status = acpi_evaluate_object(handle, method, &params, resultp);
305
306         switch (res_type) {
307         case 'd':               /* int */
308                 if (res)
309                         *(int *)res = out_obj.integer.value;
310                 success = status == AE_OK && out_obj.type == ACPI_TYPE_INTEGER;
311                 break;
312         case 'v':               /* void */
313                 success = status == AE_OK;
314                 break;
315                 /* add more types as needed */
316         default:
317                 printk(IBM_ERR "acpi_evalf() called "
318                        "with invalid format character '%c'\n", res_type);
319                 return 0;
320         }
321
322         if (!success && !quiet)
323                 printk(IBM_ERR "acpi_evalf(%s, %s, ...) failed: %d\n",
324                        method, fmt0, status);
325
326         return success;
327 }
328
329 static void __unused acpi_print_int(acpi_handle handle, char *method)
330 {
331         int i;
332
333         if (acpi_evalf(handle, &i, method, "d"))
334                 printk(IBM_INFO "%s = 0x%x\n", method, i);
335         else
336                 printk(IBM_ERR "error calling %s\n", method);
337 }
338
339 static char *next_cmd(char **cmds)
340 {
341         char *start = *cmds;
342         char *end;
343
344         while ((end = strchr(start, ',')) && end == start)
345                 start = end + 1;
346
347         if (!end)
348                 return NULL;
349
350         *end = 0;
351         *cmds = end + 1;
352         return start;
353 }
354
355 static int driver_init(void)
356 {
357         printk(IBM_INFO "%s v%s\n", IBM_DESC, IBM_VERSION);
358         printk(IBM_INFO "%s\n", IBM_URL);
359
360         return 0;
361 }
362
363 static int driver_read(char *p)
364 {
365         int len = 0;
366
367         len += sprintf(p + len, "driver:\t\t%s\n", IBM_DESC);
368         len += sprintf(p + len, "version:\t%s\n", IBM_VERSION);
369
370         return len;
371 }
372
373 static int hotkey_supported;
374 static int hotkey_mask_supported;
375 static int hotkey_orig_status;
376 static int hotkey_orig_mask;
377
378 static int hotkey_get(int *status, int *mask)
379 {
380         if (!acpi_evalf(hkey_handle, status, "DHKC", "d"))
381                 return 0;
382
383         if (hotkey_mask_supported)
384                 if (!acpi_evalf(hkey_handle, mask, "DHKN", "d"))
385                         return 0;
386
387         return 1;
388 }
389
390 static int hotkey_set(int status, int mask)
391 {
392         int i;
393
394         if (!acpi_evalf(hkey_handle, NULL, "MHKC", "vd", status))
395                 return 0;
396
397         if (hotkey_mask_supported)
398                 for (i = 0; i < 32; i++) {
399                         int bit = ((1 << i) & mask) != 0;
400                         if (!acpi_evalf(hkey_handle,
401                                         NULL, "MHKM", "vdd", i + 1, bit))
402                                 return 0;
403                 }
404
405         return 1;
406 }
407
408 static int hotkey_init(void)
409 {
410         /* hotkey not supported on 570 */
411         hotkey_supported = hkey_handle != NULL;
412
413         if (hotkey_supported) {
414                 /* mask not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
415                    A30, R30, R31, T20-22, X20-21, X22-24 */
416                 hotkey_mask_supported =
417                     acpi_evalf(hkey_handle, NULL, "DHKN", "qv");
418
419                 if (!hotkey_get(&hotkey_orig_status, &hotkey_orig_mask))
420                         return -ENODEV;
421         }
422
423         return 0;
424 }
425
426 static int hotkey_read(char *p)
427 {
428         int status, mask;
429         int len = 0;
430
431         if (!hotkey_supported) {
432                 len += sprintf(p + len, "status:\t\tnot supported\n");
433                 return len;
434         }
435
436         if (!hotkey_get(&status, &mask))
437                 return -EIO;
438
439         len += sprintf(p + len, "status:\t\t%s\n", enabled(status, 0));
440         if (hotkey_mask_supported) {
441                 len += sprintf(p + len, "mask:\t\t0x%04x\n", mask);
442                 len += sprintf(p + len,
443                                "commands:\tenable, disable, reset, <mask>\n");
444         } else {
445                 len += sprintf(p + len, "mask:\t\tnot supported\n");
446                 len += sprintf(p + len, "commands:\tenable, disable, reset\n");
447         }
448
449         return len;
450 }
451
452 static int hotkey_write(char *buf)
453 {
454         int status, mask;
455         char *cmd;
456         int do_cmd = 0;
457
458         if (!hotkey_supported)
459                 return -ENODEV;
460
461         if (!hotkey_get(&status, &mask))
462                 return -EIO;
463
464         while ((cmd = next_cmd(&buf))) {
465                 if (strlencmp(cmd, "enable") == 0) {
466                         status = 1;
467                 } else if (strlencmp(cmd, "disable") == 0) {
468                         status = 0;
469                 } else if (strlencmp(cmd, "reset") == 0) {
470                         status = hotkey_orig_status;
471                         mask = hotkey_orig_mask;
472                 } else if (sscanf(cmd, "0x%x", &mask) == 1) {
473                         /* mask set */
474                 } else if (sscanf(cmd, "%x", &mask) == 1) {
475                         /* mask set */
476                 } else
477                         return -EINVAL;
478                 do_cmd = 1;
479         }
480
481         if (do_cmd && !hotkey_set(status, mask))
482                 return -EIO;
483
484         return 0;
485 }
486
487 static void hotkey_exit(void)
488 {
489         if (hotkey_supported)
490                 hotkey_set(hotkey_orig_status, hotkey_orig_mask);
491 }
492
493 static void hotkey_notify(struct ibm_struct *ibm, u32 event)
494 {
495         int hkey;
496
497         if (acpi_evalf(hkey_handle, &hkey, "MHKP", "d"))
498                 acpi_bus_generate_event(ibm->device, event, hkey);
499         else {
500                 printk(IBM_ERR "unknown hotkey event %d\n", event);
501                 acpi_bus_generate_event(ibm->device, event, 0);
502         }
503 }
504
505 static int bluetooth_supported;
506
507 static int bluetooth_init(void)
508 {
509         /* bluetooth not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
510            G4x, R30, R31, R40e, R50e, T20-22, X20-21 */
511         bluetooth_supported = hkey_handle &&
512             acpi_evalf(hkey_handle, NULL, "GBDC", "qv");
513
514         return 0;
515 }
516
517 static int bluetooth_status(void)
518 {
519         int status;
520
521         if (!bluetooth_supported ||
522             !acpi_evalf(hkey_handle, &status, "GBDC", "d"))
523                 status = 0;
524
525         return status;
526 }
527
528 static int bluetooth_read(char *p)
529 {
530         int len = 0;
531         int status = bluetooth_status();
532
533         if (!bluetooth_supported)
534                 len += sprintf(p + len, "status:\t\tnot supported\n");
535         else if (!(status & 1))
536                 len += sprintf(p + len, "status:\t\tnot installed\n");
537         else {
538                 len += sprintf(p + len, "status:\t\t%s\n", enabled(status, 1));
539                 len += sprintf(p + len, "commands:\tenable, disable\n");
540         }
541
542         return len;
543 }
544
545 static int bluetooth_write(char *buf)
546 {
547         int status = bluetooth_status();
548         char *cmd;
549         int do_cmd = 0;
550
551         if (!bluetooth_supported)
552                 return -ENODEV;
553
554         while ((cmd = next_cmd(&buf))) {
555                 if (strlencmp(cmd, "enable") == 0) {
556                         status |= 2;
557                 } else if (strlencmp(cmd, "disable") == 0) {
558                         status &= ~2;
559                 } else
560                         return -EINVAL;
561                 do_cmd = 1;
562         }
563
564         if (do_cmd && !acpi_evalf(hkey_handle, NULL, "SBDC", "vd", status))
565                 return -EIO;
566
567         return 0;
568 }
569
570 static int wan_supported;
571
572 static int wan_init(void)
573 {
574         wan_supported = hkey_handle &&
575             acpi_evalf(hkey_handle, NULL, "GWAN", "qv");
576
577         return 0;
578 }
579
580 static int wan_status(void)
581 {
582         int status;
583
584         if (!wan_supported ||
585             !acpi_evalf(hkey_handle, &status, "GWAN", "d"))
586                 status = 0;
587
588         return status;
589 }
590
591 static int wan_read(char *p)
592 {
593         int len = 0;
594         int status = wan_status();
595
596         if (!wan_supported)
597                 len += sprintf(p + len, "status:\t\tnot supported\n");
598         else if (!(status & 1))
599                 len += sprintf(p + len, "status:\t\tnot installed\n");
600         else {
601                 len += sprintf(p + len, "status:\t\t%s\n", enabled(status, 1));
602                 len += sprintf(p + len, "commands:\tenable, disable\n");
603         }
604
605         return len;
606 }
607
608 static int wan_write(char *buf)
609 {
610         int status = wan_status();
611         char *cmd;
612         int do_cmd = 0;
613
614         if (!wan_supported)
615                 return -ENODEV;
616
617         while ((cmd = next_cmd(&buf))) {
618                 if (strlencmp(cmd, "enable") == 0) {
619                         status |= 2;
620                 } else if (strlencmp(cmd, "disable") == 0) {
621                         status &= ~2;
622                 } else
623                         return -EINVAL;
624                 do_cmd = 1;
625         }
626
627         if (do_cmd && !acpi_evalf(hkey_handle, NULL, "SWAN", "vd", status))
628                 return -EIO;
629
630         return 0;
631 }
632
633 static int video_supported;
634 static int video_orig_autosw;
635
636 #define VIDEO_570 1
637 #define VIDEO_770 2
638 #define VIDEO_NEW 3
639
640 static int video_init(void)
641 {
642         int ivga;
643
644         if (vid2_handle && acpi_evalf(NULL, &ivga, "\\IVGA", "d") && ivga)
645                 /* G41, assume IVGA doesn't change */
646                 vid_handle = vid2_handle;
647
648         if (!vid_handle)
649                 /* video switching not supported on R30, R31 */
650                 video_supported = 0;
651         else if (acpi_evalf(vid_handle, &video_orig_autosw, "SWIT", "qd"))
652                 /* 570 */
653                 video_supported = VIDEO_570;
654         else if (acpi_evalf(vid_handle, &video_orig_autosw, "^VADL", "qd"))
655                 /* 600e/x, 770e, 770x */
656                 video_supported = VIDEO_770;
657         else
658                 /* all others */
659                 video_supported = VIDEO_NEW;
660
661         return 0;
662 }
663
664 static int video_status(void)
665 {
666         int status = 0;
667         int i;
668
669         if (video_supported == VIDEO_570) {
670                 if (acpi_evalf(NULL, &i, "\\_SB.PHS", "dd", 0x87))
671                         status = i & 3;
672         } else if (video_supported == VIDEO_770) {
673                 if (acpi_evalf(NULL, &i, "\\VCDL", "d"))
674                         status |= 0x01 * i;
675                 if (acpi_evalf(NULL, &i, "\\VCDC", "d"))
676                         status |= 0x02 * i;
677         } else if (video_supported == VIDEO_NEW) {
678                 acpi_evalf(NULL, NULL, "\\VUPS", "vd", 1);
679                 if (acpi_evalf(NULL, &i, "\\VCDC", "d"))
680                         status |= 0x02 * i;
681
682                 acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0);
683                 if (acpi_evalf(NULL, &i, "\\VCDL", "d"))
684                         status |= 0x01 * i;
685                 if (acpi_evalf(NULL, &i, "\\VCDD", "d"))
686                         status |= 0x08 * i;
687         }
688
689         return status;
690 }
691
692 static int video_autosw(void)
693 {
694         int autosw = 0;
695
696         if (video_supported == VIDEO_570)
697                 acpi_evalf(vid_handle, &autosw, "SWIT", "d");
698         else if (video_supported == VIDEO_770 || video_supported == VIDEO_NEW)
699                 acpi_evalf(vid_handle, &autosw, "^VDEE", "d");
700
701         return autosw & 1;
702 }
703
704 static int video_read(char *p)
705 {
706         int status = video_status();
707         int autosw = video_autosw();
708         int len = 0;
709
710         if (!video_supported) {
711                 len += sprintf(p + len, "status:\t\tnot supported\n");
712                 return len;
713         }
714
715         len += sprintf(p + len, "status:\t\tsupported\n");
716         len += sprintf(p + len, "lcd:\t\t%s\n", enabled(status, 0));
717         len += sprintf(p + len, "crt:\t\t%s\n", enabled(status, 1));
718         if (video_supported == VIDEO_NEW)
719                 len += sprintf(p + len, "dvi:\t\t%s\n", enabled(status, 3));
720         len += sprintf(p + len, "auto:\t\t%s\n", enabled(autosw, 0));
721         len += sprintf(p + len, "commands:\tlcd_enable, lcd_disable\n");
722         len += sprintf(p + len, "commands:\tcrt_enable, crt_disable\n");
723         if (video_supported == VIDEO_NEW)
724                 len += sprintf(p + len, "commands:\tdvi_enable, dvi_disable\n");
725         len += sprintf(p + len, "commands:\tauto_enable, auto_disable\n");
726         len += sprintf(p + len, "commands:\tvideo_switch, expand_toggle\n");
727
728         return len;
729 }
730
731 static int video_switch(void)
732 {
733         int autosw = video_autosw();
734         int ret;
735
736         if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", 1))
737                 return -EIO;
738         ret = video_supported == VIDEO_570 ?
739             acpi_evalf(ec_handle, NULL, "_Q16", "v") :
740             acpi_evalf(vid_handle, NULL, "VSWT", "v");
741         acpi_evalf(vid_handle, NULL, "_DOS", "vd", autosw);
742
743         return ret;
744 }
745
746 static int video_expand(void)
747 {
748         if (video_supported == VIDEO_570)
749                 return acpi_evalf(ec_handle, NULL, "_Q17", "v");
750         else if (video_supported == VIDEO_770)
751                 return acpi_evalf(vid_handle, NULL, "VEXP", "v");
752         else
753                 return acpi_evalf(NULL, NULL, "\\VEXP", "v");
754 }
755
756 static int video_switch2(int status)
757 {
758         int ret;
759
760         if (video_supported == VIDEO_570) {
761                 ret = acpi_evalf(NULL, NULL,
762                                  "\\_SB.PHS2", "vdd", 0x8b, status | 0x80);
763         } else if (video_supported == VIDEO_770) {
764                 int autosw = video_autosw();
765                 if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", 1))
766                         return -EIO;
767
768                 ret = acpi_evalf(vid_handle, NULL,
769                                  "ASWT", "vdd", status * 0x100, 0);
770
771                 acpi_evalf(vid_handle, NULL, "_DOS", "vd", autosw);
772         } else {
773                 ret = acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0x80) &&
774                     acpi_evalf(NULL, NULL, "\\VSDS", "vdd", status, 1);
775         }
776
777         return ret;
778 }
779
780 static int video_write(char *buf)
781 {
782         char *cmd;
783         int enable, disable, status;
784
785         if (!video_supported)
786                 return -ENODEV;
787
788         enable = disable = 0;
789
790         while ((cmd = next_cmd(&buf))) {
791                 if (strlencmp(cmd, "lcd_enable") == 0) {
792                         enable |= 0x01;
793                 } else if (strlencmp(cmd, "lcd_disable") == 0) {
794                         disable |= 0x01;
795                 } else if (strlencmp(cmd, "crt_enable") == 0) {
796                         enable |= 0x02;
797                 } else if (strlencmp(cmd, "crt_disable") == 0) {
798                         disable |= 0x02;
799                 } else if (video_supported == VIDEO_NEW &&
800                            strlencmp(cmd, "dvi_enable") == 0) {
801                         enable |= 0x08;
802                 } else if (video_supported == VIDEO_NEW &&
803                            strlencmp(cmd, "dvi_disable") == 0) {
804                         disable |= 0x08;
805                 } else if (strlencmp(cmd, "auto_enable") == 0) {
806                         if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", 1))
807                                 return -EIO;
808                 } else if (strlencmp(cmd, "auto_disable") == 0) {
809                         if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", 0))
810                                 return -EIO;
811                 } else if (strlencmp(cmd, "video_switch") == 0) {
812                         if (!video_switch())
813                                 return -EIO;
814                 } else if (strlencmp(cmd, "expand_toggle") == 0) {
815                         if (!video_expand())
816                                 return -EIO;
817                 } else
818                         return -EINVAL;
819         }
820
821         if (enable || disable) {
822                 status = (video_status() & 0x0f & ~disable) | enable;
823                 if (!video_switch2(status))
824                         return -EIO;
825         }
826
827         return 0;
828 }
829
830 static void video_exit(void)
831 {
832         acpi_evalf(vid_handle, NULL, "_DOS", "vd", video_orig_autosw);
833 }
834
835 static int light_supported;
836 static int light_status_supported;
837
838 static int light_init(void)
839 {
840         /* light not supported on 570, 600e/x, 770e, 770x, G4x, R30, R31 */
841         light_supported = (cmos_handle || lght_handle) && !ledb_handle;
842
843         if (light_supported)
844                 /* light status not supported on
845                    570, 600e/x, 770e, 770x, G4x, R30, R31, R32, X20 */
846                 light_status_supported = acpi_evalf(ec_handle, NULL,
847                                                     "KBLT", "qv");
848
849         return 0;
850 }
851
852 static int light_read(char *p)
853 {
854         int len = 0;
855         int status = 0;
856
857         if (!light_supported) {
858                 len += sprintf(p + len, "status:\t\tnot supported\n");
859         } else if (!light_status_supported) {
860                 len += sprintf(p + len, "status:\t\tunknown\n");
861                 len += sprintf(p + len, "commands:\ton, off\n");
862         } else {
863                 if (!acpi_evalf(ec_handle, &status, "KBLT", "d"))
864                         return -EIO;
865                 len += sprintf(p + len, "status:\t\t%s\n", onoff(status, 0));
866                 len += sprintf(p + len, "commands:\ton, off\n");
867         }
868
869         return len;
870 }
871
872 static int light_write(char *buf)
873 {
874         int cmos_cmd, lght_cmd;
875         char *cmd;
876         int success;
877
878         if (!light_supported)
879                 return -ENODEV;
880
881         while ((cmd = next_cmd(&buf))) {
882                 if (strlencmp(cmd, "on") == 0) {
883                         cmos_cmd = 0x0c;
884                         lght_cmd = 1;
885                 } else if (strlencmp(cmd, "off") == 0) {
886                         cmos_cmd = 0x0d;
887                         lght_cmd = 0;
888                 } else
889                         return -EINVAL;
890
891                 success = cmos_handle ?
892                     acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd) :
893                     acpi_evalf(lght_handle, NULL, NULL, "vd", lght_cmd);
894                 if (!success)
895                         return -EIO;
896         }
897
898         return 0;
899 }
900
901 static int _sta(acpi_handle handle)
902 {
903         int status;
904
905         if (!handle || !acpi_evalf(handle, &status, "_STA", "d"))
906                 status = 0;
907
908         return status;
909 }
910 #ifdef CONFIG_ACPI_IBM_DOCK
911 #define dock_docked() (_sta(dock_handle) & 1)
912
913 static int dock_read(char *p)
914 {
915         int len = 0;
916         int docked = dock_docked();
917
918         if (!dock_handle)
919                 len += sprintf(p + len, "status:\t\tnot supported\n");
920         else if (!docked)
921                 len += sprintf(p + len, "status:\t\tundocked\n");
922         else {
923                 len += sprintf(p + len, "status:\t\tdocked\n");
924                 len += sprintf(p + len, "commands:\tdock, undock\n");
925         }
926
927         return len;
928 }
929
930 static int dock_write(char *buf)
931 {
932         char *cmd;
933
934         if (!dock_docked())
935                 return -ENODEV;
936
937         while ((cmd = next_cmd(&buf))) {
938                 if (strlencmp(cmd, "undock") == 0) {
939                         if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 0) ||
940                             !acpi_evalf(dock_handle, NULL, "_EJ0", "vd", 1))
941                                 return -EIO;
942                 } else if (strlencmp(cmd, "dock") == 0) {
943                         if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 1))
944                                 return -EIO;
945                 } else
946                         return -EINVAL;
947         }
948
949         return 0;
950 }
951
952 static void dock_notify(struct ibm_struct *ibm, u32 event)
953 {
954         int docked = dock_docked();
955         int pci = ibm->hid && strstr(ibm->hid, IBM_PCI_HID);
956
957         if (event == 1 && !pci) /* 570 */
958                 acpi_bus_generate_event(ibm->device, event, 1); /* button */
959         else if (event == 1 && pci)     /* 570 */
960                 acpi_bus_generate_event(ibm->device, event, 3); /* dock */
961         else if (event == 3 && docked)
962                 acpi_bus_generate_event(ibm->device, event, 1); /* button */
963         else if (event == 3 && !docked)
964                 acpi_bus_generate_event(ibm->device, event, 2); /* undock */
965         else if (event == 0 && docked)
966                 acpi_bus_generate_event(ibm->device, event, 3); /* dock */
967         else {
968                 printk(IBM_ERR "unknown dock event %d, status %d\n",
969                        event, _sta(dock_handle));
970                 acpi_bus_generate_event(ibm->device, event, 0); /* unknown */
971         }
972 }
973 #endif
974
975 static int bay_status_supported;
976 static int bay_status2_supported;
977 static int bay_eject_supported;
978 static int bay_eject2_supported;
979
980 static int bay_init(void)
981 {
982         bay_status_supported = bay_handle &&
983             acpi_evalf(bay_handle, NULL, "_STA", "qv");
984         bay_status2_supported = bay2_handle &&
985             acpi_evalf(bay2_handle, NULL, "_STA", "qv");
986
987         bay_eject_supported = bay_handle && bay_ej_handle &&
988             (strlencmp(bay_ej_path, "_EJ0") == 0 || experimental);
989         bay_eject2_supported = bay2_handle && bay2_ej_handle &&
990             (strlencmp(bay2_ej_path, "_EJ0") == 0 || experimental);
991
992         return 0;
993 }
994
995 #define bay_occupied(b) (_sta(b##_handle) & 1)
996
997 static int bay_read(char *p)
998 {
999         int len = 0;
1000         int occupied = bay_occupied(bay);
1001         int occupied2 = bay_occupied(bay2);
1002         int eject, eject2;
1003
1004         len += sprintf(p + len, "status:\t\t%s\n", bay_status_supported ?
1005                        (occupied ? "occupied" : "unoccupied") :
1006                        "not supported");
1007         if (bay_status2_supported)
1008                 len += sprintf(p + len, "status2:\t%s\n", occupied2 ?
1009                                "occupied" : "unoccupied");
1010
1011         eject = bay_eject_supported && occupied;
1012         eject2 = bay_eject2_supported && occupied2;
1013
1014         if (eject && eject2)
1015                 len += sprintf(p + len, "commands:\teject, eject2\n");
1016         else if (eject)
1017                 len += sprintf(p + len, "commands:\teject\n");
1018         else if (eject2)
1019                 len += sprintf(p + len, "commands:\teject2\n");
1020
1021         return len;
1022 }
1023
1024 static int bay_write(char *buf)
1025 {
1026         char *cmd;
1027
1028         if (!bay_eject_supported && !bay_eject2_supported)
1029                 return -ENODEV;
1030
1031         while ((cmd = next_cmd(&buf))) {
1032                 if (bay_eject_supported && strlencmp(cmd, "eject") == 0) {
1033                         if (!acpi_evalf(bay_ej_handle, NULL, NULL, "vd", 1))
1034                                 return -EIO;
1035                 } else if (bay_eject2_supported &&
1036                            strlencmp(cmd, "eject2") == 0) {
1037                         if (!acpi_evalf(bay2_ej_handle, NULL, NULL, "vd", 1))
1038                                 return -EIO;
1039                 } else
1040                         return -EINVAL;
1041         }
1042
1043         return 0;
1044 }
1045
1046 static void bay_notify(struct ibm_struct *ibm, u32 event)
1047 {
1048         acpi_bus_generate_event(ibm->device, event, 0);
1049 }
1050
1051 static int cmos_read(char *p)
1052 {
1053         int len = 0;
1054
1055         /* cmos not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
1056            R30, R31, T20-22, X20-21 */
1057         if (!cmos_handle)
1058                 len += sprintf(p + len, "status:\t\tnot supported\n");
1059         else {
1060                 len += sprintf(p + len, "status:\t\tsupported\n");
1061                 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-21)\n");
1062         }
1063
1064         return len;
1065 }
1066
1067 static int cmos_eval(int cmos_cmd)
1068 {
1069         if (cmos_handle)
1070                 return acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd);
1071         else
1072                 return 1;
1073 }
1074
1075 static int cmos_write(char *buf)
1076 {
1077         char *cmd;
1078         int cmos_cmd;
1079
1080         if (!cmos_handle)
1081                 return -EINVAL;
1082
1083         while ((cmd = next_cmd(&buf))) {
1084                 if (sscanf(cmd, "%u", &cmos_cmd) == 1 &&
1085                     cmos_cmd >= 0 && cmos_cmd <= 21) {
1086                         /* cmos_cmd set */
1087                 } else
1088                         return -EINVAL;
1089
1090                 if (!cmos_eval(cmos_cmd))
1091                         return -EIO;
1092         }
1093
1094         return 0;
1095 }
1096
1097 static int led_supported;
1098
1099 #define LED_570 1
1100 #define LED_OLD 2
1101 #define LED_NEW 3
1102
1103 static int led_init(void)
1104 {
1105         if (!led_handle)
1106                 /* led not supported on R30, R31 */
1107                 led_supported = 0;
1108         else if (strlencmp(led_path, "SLED") == 0)
1109                 /* 570 */
1110                 led_supported = LED_570;
1111         else if (strlencmp(led_path, "SYSL") == 0)
1112                 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
1113                 led_supported = LED_OLD;
1114         else
1115                 /* all others */
1116                 led_supported = LED_NEW;
1117
1118         return 0;
1119 }
1120
1121 #define led_status(s) ((s) == 0 ? "off" : ((s) == 1 ? "on" : "blinking"))
1122
1123 static int led_read(char *p)
1124 {
1125         int len = 0;
1126
1127         if (!led_supported) {
1128                 len += sprintf(p + len, "status:\t\tnot supported\n");
1129                 return len;
1130         }
1131         len += sprintf(p + len, "status:\t\tsupported\n");
1132
1133         if (led_supported == LED_570) {
1134                 /* 570 */
1135                 int i, status;
1136                 for (i = 0; i < 8; i++) {
1137                         if (!acpi_evalf(ec_handle,
1138                                         &status, "GLED", "dd", 1 << i))
1139                                 return -EIO;
1140                         len += sprintf(p + len, "%d:\t\t%s\n",
1141                                        i, led_status(status));
1142                 }
1143         }
1144
1145         len += sprintf(p + len, "commands:\t"
1146                        "<led> on, <led> off, <led> blink (<led> is 0-7)\n");
1147
1148         return len;
1149 }
1150
1151 /* off, on, blink */
1152 static const int led_sled_arg1[] = { 0, 1, 3 };
1153 static const int led_exp_hlbl[] = { 0, 0, 1 };  /* led# * */
1154 static const int led_exp_hlcl[] = { 0, 1, 1 };  /* led# * */
1155 static const int led_led_arg1[] = { 0, 0x80, 0xc0 };
1156
1157 #define EC_HLCL 0x0c
1158 #define EC_HLBL 0x0d
1159 #define EC_HLMS 0x0e
1160
1161 static int led_write(char *buf)
1162 {
1163         char *cmd;
1164         int led, ind, ret;
1165
1166         if (!led_supported)
1167                 return -ENODEV;
1168
1169         while ((cmd = next_cmd(&buf))) {
1170                 if (sscanf(cmd, "%d", &led) != 1 || led < 0 || led > 7)
1171                         return -EINVAL;
1172
1173                 if (strstr(cmd, "off")) {
1174                         ind = 0;
1175                 } else if (strstr(cmd, "on")) {
1176                         ind = 1;
1177                 } else if (strstr(cmd, "blink")) {
1178                         ind = 2;
1179                 } else
1180                         return -EINVAL;
1181
1182                 if (led_supported == LED_570) {
1183                         /* 570 */
1184                         led = 1 << led;
1185                         if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
1186                                         led, led_sled_arg1[ind]))
1187                                 return -EIO;
1188                 } else if (led_supported == LED_OLD) {
1189                         /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */
1190                         led = 1 << led;
1191                         ret = ec_write(EC_HLMS, led);
1192                         if (ret >= 0)
1193                                 ret =
1194                                     ec_write(EC_HLBL, led * led_exp_hlbl[ind]);
1195                         if (ret >= 0)
1196                                 ret =
1197                                     ec_write(EC_HLCL, led * led_exp_hlcl[ind]);
1198                         if (ret < 0)
1199                                 return ret;
1200                 } else {
1201                         /* all others */
1202                         if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
1203                                         led, led_led_arg1[ind]))
1204                                 return -EIO;
1205                 }
1206         }
1207
1208         return 0;
1209 }
1210
1211 static int beep_read(char *p)
1212 {
1213         int len = 0;
1214
1215         if (!beep_handle)
1216                 len += sprintf(p + len, "status:\t\tnot supported\n");
1217         else {
1218                 len += sprintf(p + len, "status:\t\tsupported\n");
1219                 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-17)\n");
1220         }
1221
1222         return len;
1223 }
1224
1225 static int beep_write(char *buf)
1226 {
1227         char *cmd;
1228         int beep_cmd;
1229
1230         if (!beep_handle)
1231                 return -ENODEV;
1232
1233         while ((cmd = next_cmd(&buf))) {
1234                 if (sscanf(cmd, "%u", &beep_cmd) == 1 &&
1235                     beep_cmd >= 0 && beep_cmd <= 17) {
1236                         /* beep_cmd set */
1237                 } else
1238                         return -EINVAL;
1239                 if (!acpi_evalf(beep_handle, NULL, NULL, "vdd", beep_cmd, 0))
1240                         return -EIO;
1241         }
1242
1243         return 0;
1244 }
1245
1246 static int acpi_ec_read(int i, u8 * p)
1247 {
1248         int v;
1249
1250         if (ecrd_handle) {
1251                 if (!acpi_evalf(ecrd_handle, &v, NULL, "dd", i))
1252                         return 0;
1253                 *p = v;
1254         } else {
1255                 if (ec_read(i, p) < 0)
1256                         return 0;
1257         }
1258
1259         return 1;
1260 }
1261
1262 static int acpi_ec_write(int i, u8 v)
1263 {
1264         if (ecwr_handle) {
1265                 if (!acpi_evalf(ecwr_handle, NULL, NULL, "vdd", i, v))
1266                         return 0;
1267         } else {
1268                 if (ec_write(i, v) < 0)
1269                         return 0;
1270         }
1271
1272         return 1;
1273 }
1274
1275 static int thermal_tmp_supported;
1276 static int thermal_updt_supported;
1277
1278 static int thermal_init(void)
1279 {
1280         /* temperatures not supported on 570, G4x, R30, R31, R32 */
1281         thermal_tmp_supported = acpi_evalf(ec_handle, NULL, "TMP7", "qv");
1282
1283         /* 600e/x, 770e, 770x */
1284         thermal_updt_supported = acpi_evalf(ec_handle, NULL, "UPDT", "qv");
1285
1286         return 0;
1287 }
1288
1289 static int thermal_read(char *p)
1290 {
1291         int len = 0;
1292
1293         if (!thermal_tmp_supported)
1294                 len += sprintf(p + len, "temperatures:\tnot supported\n");
1295         else {
1296                 int i, t;
1297                 char tmpi[] = "TMPi";
1298                 s8 tmp[8];
1299
1300                 if (thermal_updt_supported)
1301                         if (!acpi_evalf(ec_handle, NULL, "UPDT", "v"))
1302                                 return -EIO;
1303
1304                 for (i = 0; i < 8; i++) {
1305                         tmpi[3] = '0' + i;
1306                         if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
1307                                 return -EIO;
1308                         if (thermal_updt_supported)
1309                                 tmp[i] = (t - 2732 + 5) / 10;
1310                         else
1311                                 tmp[i] = t;
1312                 }
1313
1314                 len += sprintf(p + len,
1315                                "temperatures:\t%d %d %d %d %d %d %d %d\n",
1316                                tmp[0], tmp[1], tmp[2], tmp[3],
1317                                tmp[4], tmp[5], tmp[6], tmp[7]);
1318         }
1319
1320         return len;
1321 }
1322
1323 static u8 ecdump_regs[256];
1324
1325 static int ecdump_read(char *p)
1326 {
1327         int len = 0;
1328         int i, j;
1329         u8 v;
1330
1331         len += sprintf(p + len, "EC      "
1332                        " +00 +01 +02 +03 +04 +05 +06 +07"
1333                        " +08 +09 +0a +0b +0c +0d +0e +0f\n");
1334         for (i = 0; i < 256; i += 16) {
1335                 len += sprintf(p + len, "EC 0x%02x:", i);
1336                 for (j = 0; j < 16; j++) {
1337                         if (!acpi_ec_read(i + j, &v))
1338                                 break;
1339                         if (v != ecdump_regs[i + j])
1340                                 len += sprintf(p + len, " *%02x", v);
1341                         else
1342                                 len += sprintf(p + len, "  %02x", v);
1343                         ecdump_regs[i + j] = v;
1344                 }
1345                 len += sprintf(p + len, "\n");
1346                 if (j != 16)
1347                         break;
1348         }
1349
1350         /* These are way too dangerous to advertise openly... */
1351 #if 0
1352         len += sprintf(p + len, "commands:\t0x<offset> 0x<value>"
1353                        " (<offset> is 00-ff, <value> is 00-ff)\n");
1354         len += sprintf(p + len, "commands:\t0x<offset> <value>  "
1355                        " (<offset> is 00-ff, <value> is 0-255)\n");
1356 #endif
1357         return len;
1358 }
1359
1360 static int ecdump_write(char *buf)
1361 {
1362         char *cmd;
1363         int i, v;
1364
1365         while ((cmd = next_cmd(&buf))) {
1366                 if (sscanf(cmd, "0x%x 0x%x", &i, &v) == 2) {
1367                         /* i and v set */
1368                 } else if (sscanf(cmd, "0x%x %u", &i, &v) == 2) {
1369                         /* i and v set */
1370                 } else
1371                         return -EINVAL;
1372                 if (i >= 0 && i < 256 && v >= 0 && v < 256) {
1373                         if (!acpi_ec_write(i, v))
1374                                 return -EIO;
1375                 } else
1376                         return -EINVAL;
1377         }
1378
1379         return 0;
1380 }
1381
1382 static int brightness_offset = 0x31;
1383
1384 static int brightness_read(char *p)
1385 {
1386         int len = 0;
1387         u8 level;
1388
1389         if (!acpi_ec_read(brightness_offset, &level)) {
1390                 len += sprintf(p + len, "level:\t\tunreadable\n");
1391         } else {
1392                 len += sprintf(p + len, "level:\t\t%d\n", level & 0x7);
1393                 len += sprintf(p + len, "commands:\tup, down\n");
1394                 len += sprintf(p + len, "commands:\tlevel <level>"
1395                                " (<level> is 0-7)\n");
1396         }
1397
1398         return len;
1399 }
1400
1401 #define BRIGHTNESS_UP   4
1402 #define BRIGHTNESS_DOWN 5
1403
1404 static int brightness_write(char *buf)
1405 {
1406         int cmos_cmd, inc, i;
1407         u8 level;
1408         int new_level;
1409         char *cmd;
1410
1411         while ((cmd = next_cmd(&buf))) {
1412                 if (!acpi_ec_read(brightness_offset, &level))
1413                         return -EIO;
1414                 level &= 7;
1415
1416                 if (strlencmp(cmd, "up") == 0) {
1417                         new_level = level == 7 ? 7 : level + 1;
1418                 } else if (strlencmp(cmd, "down") == 0) {
1419                         new_level = level == 0 ? 0 : level - 1;
1420                 } else if (sscanf(cmd, "level %d", &new_level) == 1 &&
1421                            new_level >= 0 && new_level <= 7) {
1422                         /* new_level set */
1423                 } else
1424                         return -EINVAL;
1425
1426                 cmos_cmd = new_level > level ? BRIGHTNESS_UP : BRIGHTNESS_DOWN;
1427                 inc = new_level > level ? 1 : -1;
1428                 for (i = level; i != new_level; i += inc) {
1429                         if (!cmos_eval(cmos_cmd))
1430                                 return -EIO;
1431                         if (!acpi_ec_write(brightness_offset, i + inc))
1432                                 return -EIO;
1433                 }
1434         }
1435
1436         return 0;
1437 }
1438
1439 static int volume_offset = 0x30;
1440
1441 static int volume_read(char *p)
1442 {
1443         int len = 0;
1444         u8 level;
1445
1446         if (!acpi_ec_read(volume_offset, &level)) {
1447                 len += sprintf(p + len, "level:\t\tunreadable\n");
1448         } else {
1449                 len += sprintf(p + len, "level:\t\t%d\n", level & 0xf);
1450                 len += sprintf(p + len, "mute:\t\t%s\n", onoff(level, 6));
1451                 len += sprintf(p + len, "commands:\tup, down, mute\n");
1452                 len += sprintf(p + len, "commands:\tlevel <level>"
1453                                " (<level> is 0-15)\n");
1454         }
1455
1456         return len;
1457 }
1458
1459 #define VOLUME_DOWN     0
1460 #define VOLUME_UP       1
1461 #define VOLUME_MUTE     2
1462
1463 static int volume_write(char *buf)
1464 {
1465         int cmos_cmd, inc, i;
1466         u8 level, mute;
1467         int new_level, new_mute;
1468         char *cmd;
1469
1470         while ((cmd = next_cmd(&buf))) {
1471                 if (!acpi_ec_read(volume_offset, &level))
1472                         return -EIO;
1473                 new_mute = mute = level & 0x40;
1474                 new_level = level = level & 0xf;
1475
1476                 if (strlencmp(cmd, "up") == 0) {
1477                         if (mute)
1478                                 new_mute = 0;
1479                         else
1480                                 new_level = level == 15 ? 15 : level + 1;
1481                 } else if (strlencmp(cmd, "down") == 0) {
1482                         if (mute)
1483                                 new_mute = 0;
1484                         else
1485                                 new_level = level == 0 ? 0 : level - 1;
1486                 } else if (sscanf(cmd, "level %d", &new_level) == 1 &&
1487                            new_level >= 0 && new_level <= 15) {
1488                         /* new_level set */
1489                 } else if (strlencmp(cmd, "mute") == 0) {
1490                         new_mute = 0x40;
1491                 } else
1492                         return -EINVAL;
1493
1494                 if (new_level != level) {       /* mute doesn't change */
1495                         cmos_cmd = new_level > level ? VOLUME_UP : VOLUME_DOWN;
1496                         inc = new_level > level ? 1 : -1;
1497
1498                         if (mute && (!cmos_eval(cmos_cmd) ||
1499                                      !acpi_ec_write(volume_offset, level)))
1500                                 return -EIO;
1501
1502                         for (i = level; i != new_level; i += inc)
1503                                 if (!cmos_eval(cmos_cmd) ||
1504                                     !acpi_ec_write(volume_offset, i + inc))
1505                                         return -EIO;
1506
1507                         if (mute && (!cmos_eval(VOLUME_MUTE) ||
1508                                      !acpi_ec_write(volume_offset,
1509                                                     new_level + mute)))
1510                                 return -EIO;
1511                 }
1512
1513                 if (new_mute != mute) { /* level doesn't change */
1514                         cmos_cmd = new_mute ? VOLUME_MUTE : VOLUME_UP;
1515
1516                         if (!cmos_eval(cmos_cmd) ||
1517                             !acpi_ec_write(volume_offset, level + new_mute))
1518                                 return -EIO;
1519                 }
1520         }
1521
1522         return 0;
1523 }
1524
1525 static int fan_status_offset = 0x2f;
1526 static int fan_rpm_offset = 0x84;
1527
1528 static int fan_read(char *p)
1529 {
1530         int len = 0;
1531         int s;
1532         u8 lo, hi, status;
1533
1534         if (gfan_handle) {
1535                 /* 570, 600e/x, 770e, 770x */
1536                 if (!acpi_evalf(gfan_handle, &s, NULL, "d"))
1537                         return -EIO;
1538
1539                 len += sprintf(p + len, "level:\t\t%d\n", s);
1540         } else {
1541                 /* all except 570, 600e/x, 770e, 770x */
1542                 if (!acpi_ec_read(fan_status_offset, &status))
1543                         len += sprintf(p + len, "status:\t\tunreadable\n");
1544                 else
1545                         len += sprintf(p + len, "status:\t\t%s\n",
1546                                        enabled(status, 7));
1547
1548                 if (!acpi_ec_read(fan_rpm_offset, &lo) ||
1549                     !acpi_ec_read(fan_rpm_offset + 1, &hi))
1550                         len += sprintf(p + len, "speed:\t\tunreadable\n");
1551                 else
1552                         len += sprintf(p + len, "speed:\t\t%d\n",
1553                                        (hi << 8) + lo);
1554         }
1555
1556         if (sfan_handle)
1557                 /* 570, 770x-JL */
1558                 len += sprintf(p + len, "commands:\tlevel <level>"
1559                                " (<level> is 0-7)\n");
1560         if (!gfan_handle)
1561                 /* all except 570, 600e/x, 770e, 770x */
1562                 len += sprintf(p + len, "commands:\tenable, disable\n");
1563         if (fans_handle)
1564                 /* X31, X40 */
1565                 len += sprintf(p + len, "commands:\tspeed <speed>"
1566                                " (<speed> is 0-65535)\n");
1567
1568         return len;
1569 }
1570
1571 static int fan_write(char *buf)
1572 {
1573         char *cmd;
1574         int level, speed;
1575
1576         while ((cmd = next_cmd(&buf))) {
1577                 if (sfan_handle &&
1578                     sscanf(cmd, "level %d", &level) == 1 &&
1579                     level >= 0 && level <= 7) {
1580                         /* 570, 770x-JL */
1581                         if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", level))
1582                                 return -EIO;
1583                 } else if (!gfan_handle && strlencmp(cmd, "enable") == 0) {
1584                         /* all except 570, 600e/x, 770e, 770x */
1585                         if (!acpi_ec_write(fan_status_offset, 0x80))
1586                                 return -EIO;
1587                 } else if (!gfan_handle && strlencmp(cmd, "disable") == 0) {
1588                         /* all except 570, 600e/x, 770e, 770x */
1589                         if (!acpi_ec_write(fan_status_offset, 0x00))
1590                                 return -EIO;
1591                 } else if (fans_handle &&
1592                            sscanf(cmd, "speed %d", &speed) == 1 &&
1593                            speed >= 0 && speed <= 65535) {
1594                         /* X31, X40 */
1595                         if (!acpi_evalf(fans_handle, NULL, NULL, "vddd",
1596                                         speed, speed, speed))
1597                                 return -EIO;
1598                 } else
1599                         return -EINVAL;
1600         }
1601
1602         return 0;
1603 }
1604
1605 static struct ibm_struct ibms[] = {
1606         {
1607          .name = "driver",
1608          .init = driver_init,
1609          .read = driver_read,
1610          },
1611         {
1612          .name = "hotkey",
1613          .hid = IBM_HKEY_HID,
1614          .init = hotkey_init,
1615          .read = hotkey_read,
1616          .write = hotkey_write,
1617          .exit = hotkey_exit,
1618          .notify = hotkey_notify,
1619          .handle = &hkey_handle,
1620          .type = ACPI_DEVICE_NOTIFY,
1621          },
1622         {
1623          .name = "bluetooth",
1624          .init = bluetooth_init,
1625          .read = bluetooth_read,
1626          .write = bluetooth_write,
1627          },
1628         {
1629          .name = "wan",
1630          .init = wan_init,
1631          .read = wan_read,
1632          .write = wan_write,
1633          .experimental = 1,
1634          },
1635         {
1636          .name = "video",
1637          .init = video_init,
1638          .read = video_read,
1639          .write = video_write,
1640          .exit = video_exit,
1641          },
1642         {
1643          .name = "light",
1644          .init = light_init,
1645          .read = light_read,
1646          .write = light_write,
1647          },
1648 #ifdef CONFIG_ACPI_IBM_DOCK
1649         {
1650          .name = "dock",
1651          .read = dock_read,
1652          .write = dock_write,
1653          .notify = dock_notify,
1654          .handle = &dock_handle,
1655          .type = ACPI_SYSTEM_NOTIFY,
1656          },
1657         {
1658          .name = "dock",
1659          .hid = IBM_PCI_HID,
1660          .notify = dock_notify,
1661          .handle = &pci_handle,
1662          .type = ACPI_SYSTEM_NOTIFY,
1663          },
1664 #endif
1665         {
1666          .name = "bay",
1667          .init = bay_init,
1668          .read = bay_read,
1669          .write = bay_write,
1670          .notify = bay_notify,
1671          .handle = &bay_handle,
1672          .type = ACPI_SYSTEM_NOTIFY,
1673          },
1674         {
1675          .name = "cmos",
1676          .read = cmos_read,
1677          .write = cmos_write,
1678          },
1679         {
1680          .name = "led",
1681          .init = led_init,
1682          .read = led_read,
1683          .write = led_write,
1684          },
1685         {
1686          .name = "beep",
1687          .read = beep_read,
1688          .write = beep_write,
1689          },
1690         {
1691          .name = "thermal",
1692          .init = thermal_init,
1693          .read = thermal_read,
1694          },
1695         {
1696          .name = "ecdump",
1697          .read = ecdump_read,
1698          .write = ecdump_write,
1699          .experimental = 1,
1700          },
1701         {
1702          .name = "brightness",
1703          .read = brightness_read,
1704          .write = brightness_write,
1705          .experimental = 1,
1706          },
1707         {
1708          .name = "volume",
1709          .read = volume_read,
1710          .write = volume_write,
1711          .experimental = 1,
1712          },
1713         {
1714          .name = "fan",
1715          .read = fan_read,
1716          .write = fan_write,
1717          .experimental = 1,
1718          },
1719 };
1720
1721 static int dispatch_read(char *page, char **start, off_t off, int count,
1722                          int *eof, void *data)
1723 {
1724         struct ibm_struct *ibm = data;
1725         int len;
1726
1727         if (!ibm || !ibm->read)
1728                 return -EINVAL;
1729
1730         len = ibm->read(page);
1731         if (len < 0)
1732                 return len;
1733
1734         if (len <= off + count)
1735                 *eof = 1;
1736         *start = page + off;
1737         len -= off;
1738         if (len > count)
1739                 len = count;
1740         if (len < 0)
1741                 len = 0;
1742
1743         return len;
1744 }
1745
1746 static int dispatch_write(struct file *file, const char __user * userbuf,
1747                           unsigned long count, void *data)
1748 {
1749         struct ibm_struct *ibm = data;
1750         char *kernbuf;
1751         int ret;
1752
1753         if (!ibm || !ibm->write)
1754                 return -EINVAL;
1755
1756         kernbuf = kmalloc(count + 2, GFP_KERNEL);
1757         if (!kernbuf)
1758                 return -ENOMEM;
1759
1760         if (copy_from_user(kernbuf, userbuf, count)) {
1761                 kfree(kernbuf);
1762                 return -EFAULT;
1763         }
1764
1765         kernbuf[count] = 0;
1766         strcat(kernbuf, ",");
1767         ret = ibm->write(kernbuf);
1768         if (ret == 0)
1769                 ret = count;
1770
1771         kfree(kernbuf);
1772
1773         return ret;
1774 }
1775
1776 static void dispatch_notify(acpi_handle handle, u32 event, void *data)
1777 {
1778         struct ibm_struct *ibm = data;
1779
1780         if (!ibm || !ibm->notify)
1781                 return;
1782
1783         ibm->notify(ibm, event);
1784 }
1785
1786 static int __init setup_notify(struct ibm_struct *ibm)
1787 {
1788         acpi_status status;
1789         int ret;
1790
1791         if (!*ibm->handle)
1792                 return 0;
1793
1794         ret = acpi_bus_get_device(*ibm->handle, &ibm->device);
1795         if (ret < 0) {
1796                 printk(IBM_ERR "%s device not present\n", ibm->name);
1797                 return 0;
1798         }
1799
1800         acpi_driver_data(ibm->device) = ibm;
1801         sprintf(acpi_device_class(ibm->device), "%s/%s", IBM_NAME, ibm->name);
1802
1803         status = acpi_install_notify_handler(*ibm->handle, ibm->type,
1804                                              dispatch_notify, ibm);
1805         if (ACPI_FAILURE(status)) {
1806                 printk(IBM_ERR "acpi_install_notify_handler(%s) failed: %d\n",
1807                        ibm->name, status);
1808                 return -ENODEV;
1809         }
1810
1811         return 0;
1812 }
1813
1814 static int __init ibm_device_add(struct acpi_device *device)
1815 {
1816         return 0;
1817 }
1818
1819 static int __init register_driver(struct ibm_struct *ibm)
1820 {
1821         int ret;
1822
1823         ibm->driver = kmalloc(sizeof(struct acpi_driver), GFP_KERNEL);
1824         if (!ibm->driver) {
1825                 printk(IBM_ERR "kmalloc(ibm->driver) failed\n");
1826                 return -1;
1827         }
1828
1829         memset(ibm->driver, 0, sizeof(struct acpi_driver));
1830         sprintf(ibm->driver->name, "%s/%s", IBM_NAME, ibm->name);
1831         ibm->driver->ids = ibm->hid;
1832         ibm->driver->ops.add = &ibm_device_add;
1833
1834         ret = acpi_bus_register_driver(ibm->driver);
1835         if (ret < 0) {
1836                 printk(IBM_ERR "acpi_bus_register_driver(%s) failed: %d\n",
1837                        ibm->hid, ret);
1838                 kfree(ibm->driver);
1839         }
1840
1841         return ret;
1842 }
1843
1844 static int __init ibm_init(struct ibm_struct *ibm)
1845 {
1846         int ret;
1847         struct proc_dir_entry *entry;
1848
1849         if (ibm->experimental && !experimental)
1850                 return 0;
1851
1852         if (ibm->hid) {
1853                 ret = register_driver(ibm);
1854                 if (ret < 0)
1855                         return ret;
1856                 ibm->driver_registered = 1;
1857         }
1858
1859         if (ibm->init) {
1860                 ret = ibm->init();
1861                 if (ret != 0)
1862                         return ret;
1863                 ibm->init_called = 1;
1864         }
1865
1866         if (ibm->read) {
1867                 entry = create_proc_entry(ibm->name,
1868                                           S_IFREG | S_IRUGO | S_IWUSR,
1869                                           proc_dir);
1870                 if (!entry) {
1871                         printk(IBM_ERR "unable to create proc entry %s\n",
1872                                ibm->name);
1873                         return -ENODEV;
1874                 }
1875                 entry->owner = THIS_MODULE;
1876                 entry->data = ibm;
1877                 entry->read_proc = &dispatch_read;
1878                 if (ibm->write)
1879                         entry->write_proc = &dispatch_write;
1880                 ibm->proc_created = 1;
1881         }
1882
1883         if (ibm->notify) {
1884                 ret = setup_notify(ibm);
1885                 if (ret < 0)
1886                         return ret;
1887                 ibm->notify_installed = 1;
1888         }
1889
1890         return 0;
1891 }
1892
1893 static void ibm_exit(struct ibm_struct *ibm)
1894 {
1895         if (ibm->notify_installed)
1896                 acpi_remove_notify_handler(*ibm->handle, ibm->type,
1897                                            dispatch_notify);
1898
1899         if (ibm->proc_created)
1900                 remove_proc_entry(ibm->name, proc_dir);
1901
1902         if (ibm->init_called && ibm->exit)
1903                 ibm->exit();
1904
1905         if (ibm->driver_registered) {
1906                 acpi_bus_unregister_driver(ibm->driver);
1907                 kfree(ibm->driver);
1908         }
1909 }
1910
1911 static void __init ibm_handle_init(char *name,
1912                                    acpi_handle * handle, acpi_handle parent,
1913                                    char **paths, int num_paths, char **path)
1914 {
1915         int i;
1916         acpi_status status;
1917
1918         for (i = 0; i < num_paths; i++) {
1919                 status = acpi_get_handle(parent, paths[i], handle);
1920                 if (ACPI_SUCCESS(status)) {
1921                         *path = paths[i];
1922                         return;
1923                 }
1924         }
1925
1926         *handle = NULL;
1927 }
1928
1929 #define IBM_HANDLE_INIT(object)                                         \
1930         ibm_handle_init(#object, &object##_handle, *object##_parent,    \
1931                 object##_paths, ARRAY_SIZE(object##_paths), &object##_path)
1932
1933 static int set_ibm_param(const char *val, struct kernel_param *kp)
1934 {
1935         unsigned int i;
1936
1937         for (i = 0; i < ARRAY_SIZE(ibms); i++)
1938                 if (strcmp(ibms[i].name, kp->name) == 0 && ibms[i].write) {
1939                         if (strlen(val) > sizeof(ibms[i].param) - 2)
1940                                 return -ENOSPC;
1941                         strcpy(ibms[i].param, val);
1942                         strcat(ibms[i].param, ",");
1943                         return 0;
1944                 }
1945
1946         return -EINVAL;
1947 }
1948
1949 #define IBM_PARAM(feature) \
1950         module_param_call(feature, set_ibm_param, NULL, NULL, 0)
1951
1952 IBM_PARAM(hotkey);
1953 IBM_PARAM(bluetooth);
1954 IBM_PARAM(video);
1955 IBM_PARAM(light);
1956 #ifdef CONFIG_ACPI_IBM_DOCK
1957 IBM_PARAM(dock);
1958 #endif
1959 IBM_PARAM(bay);
1960 IBM_PARAM(cmos);
1961 IBM_PARAM(led);
1962 IBM_PARAM(beep);
1963 IBM_PARAM(ecdump);
1964 IBM_PARAM(brightness);
1965 IBM_PARAM(volume);
1966 IBM_PARAM(fan);
1967
1968 static void acpi_ibm_exit(void)
1969 {
1970         int i;
1971
1972         for (i = ARRAY_SIZE(ibms) - 1; i >= 0; i--)
1973                 ibm_exit(&ibms[i]);
1974
1975         remove_proc_entry(IBM_DIR, acpi_root_dir);
1976 }
1977
1978 static int __init acpi_ibm_init(void)
1979 {
1980         int ret, i;
1981
1982         if (acpi_disabled)
1983                 return -ENODEV;
1984
1985         if (!acpi_specific_hotkey_enabled) {
1986                 printk(IBM_ERR "using generic hotkey driver\n");
1987                 return -ENODEV;
1988         }
1989
1990         /* ec is required because many other handles are relative to it */
1991         IBM_HANDLE_INIT(ec);
1992         if (!ec_handle) {
1993                 printk(IBM_ERR "ec object not found\n");
1994                 return -ENODEV;
1995         }
1996
1997         /* these handles are not required */
1998         IBM_HANDLE_INIT(vid);
1999         IBM_HANDLE_INIT(vid2);
2000         IBM_HANDLE_INIT(ledb);
2001         IBM_HANDLE_INIT(led);
2002         IBM_HANDLE_INIT(hkey);
2003         IBM_HANDLE_INIT(lght);
2004         IBM_HANDLE_INIT(cmos);
2005 #ifdef CONFIG_ACPI_IBM_DOCK
2006         IBM_HANDLE_INIT(dock);
2007 #endif
2008         IBM_HANDLE_INIT(pci);
2009         IBM_HANDLE_INIT(bay);
2010         if (bay_handle)
2011                 IBM_HANDLE_INIT(bay_ej);
2012         IBM_HANDLE_INIT(bay2);
2013         if (bay2_handle)
2014                 IBM_HANDLE_INIT(bay2_ej);
2015         IBM_HANDLE_INIT(beep);
2016         IBM_HANDLE_INIT(ecrd);
2017         IBM_HANDLE_INIT(ecwr);
2018         IBM_HANDLE_INIT(fans);
2019         IBM_HANDLE_INIT(gfan);
2020         IBM_HANDLE_INIT(sfan);
2021
2022         proc_dir = proc_mkdir(IBM_DIR, acpi_root_dir);
2023         if (!proc_dir) {
2024                 printk(IBM_ERR "unable to create proc dir %s", IBM_DIR);
2025                 return -ENODEV;
2026         }
2027         proc_dir->owner = THIS_MODULE;
2028
2029         for (i = 0; i < ARRAY_SIZE(ibms); i++) {
2030                 ret = ibm_init(&ibms[i]);
2031                 if (ret >= 0 && *ibms[i].param)
2032                         ret = ibms[i].write(ibms[i].param);
2033                 if (ret < 0) {
2034                         acpi_ibm_exit();
2035                         return ret;
2036                 }
2037         }
2038
2039         return 0;
2040 }
2041
2042 module_init(acpi_ibm_init);
2043 module_exit(acpi_ibm_exit);