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backlight: Remove unneeded owner field
[linux-2.6/kvm.git] / drivers / acpi / ibm_acpi.c
blobaccf4f7da889b56bb2beb61fd175f7d9a4e30687
1 /*
2 * ibm_acpi.c - IBM ThinkPad ACPI Extras
3 *
4 *
5 * Copyright (C) 2004-2005 Borislav Deianov <borislav@users.sf.net>
6 * Copyright (C) 2006 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
21 */
22
23 #define IBM_VERSION "0.13"
24
25 /*
26 * Changelog:
27 *
28 * 2006-11-22 0.13 new maintainer
29 * changelog now lives in git commit history, and will
30 * not be updated further in-file.
31 *
32 * 2005-08-17 0.12 fix compilation on 2.6.13-rc kernels
33 * 2005-03-17 0.11 support for 600e, 770x
34 * thanks to Jamie Lentin <lentinj@dial.pipex.com>
35 * support for 770e, G41
36 * G40 and G41 don't have a thinklight
37 * temperatures no longer experimental
38 * experimental brightness control
39 * experimental volume control
40 * experimental fan enable/disable
41 * 2005-01-16 0.10 fix module loading on R30, R31
42 * 2005-01-16 0.9 support for 570, R30, R31
43 * ultrabay support on A22p, A3x
44 * limit arg for cmos, led, beep, drop experimental status
45 * more capable led control on A21e, A22p, T20-22, X20
46 * experimental temperatures and fan speed
47 * experimental embedded controller register dump
48 * mark more functions as __init, drop incorrect __exit
49 * use MODULE_VERSION
50 * thanks to Henrik Brix Andersen <brix@gentoo.org>
51 * fix parameter passing on module loading
52 * thanks to Rusty Russell <rusty@rustcorp.com.au>
53 * thanks to Jim Radford <radford@blackbean.org>
54 * 2004-11-08 0.8 fix init error case, don't return from a macro
55 * thanks to Chris Wright <chrisw@osdl.org>
56 * 2004-10-23 0.7 fix module loading on A21e, A22p, T20, T21, X20
57 * fix led control on A21e
58 * 2004-10-19 0.6 use acpi_bus_register_driver() to claim HKEY device
59 * 2004-10-18 0.5 thinklight support on A21e, G40, R32, T20, T21, X20
60 * proc file format changed
61 * video_switch command
62 * experimental cmos control
63 * experimental led control
64 * experimental acpi sounds
65 * 2004-09-16 0.4 support for module parameters
66 * hotkey mask can be prefixed by 0x
67 * video output switching
68 * video expansion control
69 * ultrabay eject support
70 * removed lcd brightness/on/off control, didn't work
71 * 2004-08-17 0.3 support for R40
72 * lcd off, brightness control
73 * thinklight on/off
74 * 2004-08-14 0.2 support for T series, X20
75 * bluetooth enable/disable
76 * hotkey events disabled by default
77 * removed fan control, currently useless
78 * 2004-08-09 0.1 initial release, support for X series
79 */
80
81 #include <linux/kernel.h>
82 #include <linux/module.h>
83 #include <linux/init.h>
84 #include <linux/types.h>
85 #include <linux/string.h>
86
87 #include <linux/proc_fs.h>
88 #include <linux/backlight.h>
89 #include <asm/uaccess.h>
90
91 #include <linux/dmi.h>
92 #include <linux/jiffies.h>
93 #include <linux/workqueue.h>
94
95 #include <acpi/acpi_drivers.h>
96 #include <acpi/acnamesp.h>
97
98 #define IBM_NAME "ibm"
99 #define IBM_DESC "IBM ThinkPad ACPI Extras"
100 #define IBM_FILE "ibm_acpi"
101 #define IBM_URL "http://ibm-acpi.sf.net/"
102
103 MODULE_AUTHOR("Borislav Deianov, Henrique de Moraes Holschuh");
104 MODULE_DESCRIPTION(IBM_DESC);
105 MODULE_VERSION(IBM_VERSION);
106 MODULE_LICENSE("GPL");
107
108 #define IBM_DIR IBM_NAME
109
110 #define IBM_LOG IBM_FILE ": "
111 #define IBM_ERR KERN_ERR IBM_LOG
112 #define IBM_NOTICE KERN_NOTICE IBM_LOG
113 #define IBM_INFO KERN_INFO IBM_LOG
114 #define IBM_DEBUG KERN_DEBUG IBM_LOG
115
116 #define IBM_MAX_ACPI_ARGS 3
117
118 #define __unused __attribute__ ((unused))
119
120 static int experimental;
121 module_param(experimental, int, 0);
122
123 static acpi_handle root_handle = NULL;
124
125 #define IBM_HANDLE(object, parent, paths...) \
126 static acpi_handle object##_handle; \
127 static acpi_handle *object##_parent = &parent##_handle; \
128 static char *object##_path; \
129 static char *object##_paths[] = { paths }
130
131 IBM_HANDLE(ec, root, "\\_SB.PCI0.ISA.EC0", /* 240, 240x */
132 "\\_SB.PCI.ISA.EC", /* 570 */
133 "\\_SB.PCI0.ISA0.EC0", /* 600e/x, 770e, 770x */
134 "\\_SB.PCI0.ISA.EC", /* A21e, A2xm/p, T20-22, X20-21 */
135 "\\_SB.PCI0.AD4S.EC0", /* i1400, R30 */
136 "\\_SB.PCI0.ICH3.EC0", /* R31 */
137 "\\_SB.PCI0.LPC.EC", /* all others */
138 );
139
140 IBM_HANDLE(vid, root, "\\_SB.PCI.AGP.VGA", /* 570 */
141 "\\_SB.PCI0.AGP0.VID0", /* 600e/x, 770x */
142 "\\_SB.PCI0.VID0", /* 770e */
143 "\\_SB.PCI0.VID", /* A21e, G4x, R50e, X30, X40 */
144 "\\_SB.PCI0.AGP.VID", /* all others */
145 ); /* R30, R31 */
146
147 IBM_HANDLE(vid2, root, "\\_SB.PCI0.AGPB.VID"); /* G41 */
148
149 IBM_HANDLE(cmos, root, "\\UCMS", /* R50, R50e, R50p, R51, T4x, X31, X40 */
150 "\\CMOS", /* A3x, G4x, R32, T23, T30, X22-24, X30 */
151 "\\CMS", /* R40, R40e */
152 ); /* all others */
153 #ifdef CONFIG_ACPI_IBM_DOCK
154 IBM_HANDLE(dock, root, "\\_SB.GDCK", /* X30, X31, X40 */
155 "\\_SB.PCI0.DOCK", /* 600e/x,770e,770x,A2xm/p,T20-22,X20-21 */
156 "\\_SB.PCI0.PCI1.DOCK", /* all others */
157 "\\_SB.PCI.ISA.SLCE", /* 570 */
158 ); /* A21e,G4x,R30,R31,R32,R40,R40e,R50e */
159 #endif
160 IBM_HANDLE(bay, root, "\\_SB.PCI.IDE.SECN.MAST", /* 570 */
161 "\\_SB.PCI0.IDE0.IDES.IDSM", /* 600e/x, 770e, 770x */
162 "\\_SB.PCI0.SATA.SCND.MSTR", /* T60, X60, Z60 */
163 "\\_SB.PCI0.IDE0.SCND.MSTR", /* all others */
164 ); /* A21e, R30, R31 */
165
166 IBM_HANDLE(bay_ej, bay, "_EJ3", /* 600e/x, A2xm/p, A3x */
167 "_EJ0", /* all others */
168 ); /* 570,A21e,G4x,R30,R31,R32,R40e,R50e */
169
170 IBM_HANDLE(bay2, root, "\\_SB.PCI0.IDE0.PRIM.SLAV", /* A3x, R32 */
171 "\\_SB.PCI0.IDE0.IDEP.IDPS", /* 600e/x, 770e, 770x */
172 ); /* all others */
173
174 IBM_HANDLE(bay2_ej, bay2, "_EJ3", /* 600e/x, 770e, A3x */
175 "_EJ0", /* 770x */
176 ); /* all others */
177
178 /* don't list other alternatives as we install a notify handler on the 570 */
179 IBM_HANDLE(pci, root, "\\_SB.PCI"); /* 570 */
180
181 IBM_HANDLE(hkey, ec, "\\_SB.HKEY", /* 600e/x, 770e, 770x */
182 "^HKEY", /* R30, R31 */
183 "HKEY", /* all others */
184 ); /* 570 */
185
186 IBM_HANDLE(lght, root, "\\LGHT"); /* A21e, A2xm/p, T20-22, X20-21 */
187 IBM_HANDLE(ledb, ec, "LEDB"); /* G4x */
188
189 IBM_HANDLE(led, ec, "SLED", /* 570 */
190 "SYSL", /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
191 "LED", /* all others */
192 ); /* R30, R31 */
193
194 IBM_HANDLE(beep, ec, "BEEP"); /* all except R30, R31 */
195 IBM_HANDLE(ecrd, ec, "ECRD"); /* 570 */
196 IBM_HANDLE(ecwr, ec, "ECWR"); /* 570 */
197 IBM_HANDLE(fans, ec, "FANS"); /* X31, X40, X41 */
198
199 IBM_HANDLE(gfan, ec, "GFAN", /* 570 */
200 "\\FSPD", /* 600e/x, 770e, 770x */
201 ); /* all others */
202
203 IBM_HANDLE(sfan, ec, "SFAN", /* 570 */
204 "JFNS", /* 770x-JL */
205 ); /* all others */
206
207 #define IBM_HKEY_HID "IBM0068"
208 #define IBM_PCI_HID "PNP0A03"
209
210 enum thermal_access_mode {
211 IBMACPI_THERMAL_NONE = 0, /* No thermal support */
212 IBMACPI_THERMAL_ACPI_TMP07, /* Use ACPI TMP0-7 */
213 IBMACPI_THERMAL_ACPI_UPDT, /* Use ACPI TMP0-7 with UPDT */
214 IBMACPI_THERMAL_TPEC_8, /* Use ACPI EC regs, 8 sensors */
215 IBMACPI_THERMAL_TPEC_16, /* Use ACPI EC regs, 16 sensors */
216 };
217
218 #define IBMACPI_MAX_THERMAL_SENSORS 16 /* Max thermal sensors supported */
219 struct ibm_thermal_sensors_struct {
220 s32 temp[IBMACPI_MAX_THERMAL_SENSORS];
221 };
222
223 /*
224 * FAN ACCESS MODES
225 *
226 * IBMACPI_FAN_RD_ACPI_GFAN:
227 * ACPI GFAN method: returns fan level
228 *
229 * see IBMACPI_FAN_WR_ACPI_SFAN
230 * EC 0x2f not available if GFAN exists
231 *
232 * IBMACPI_FAN_WR_ACPI_SFAN:
233 * ACPI SFAN method: sets fan level, 0 (stop) to 7 (max)
234 *
235 * EC 0x2f might be available *for reading*, but never for writing.
236 *
237 * IBMACPI_FAN_WR_TPEC:
238 * ThinkPad EC register 0x2f (HFSP): fan control loop mode Supported
239 * on almost all ThinkPads
240 *
241 * Fan speed changes of any sort (including those caused by the
242 * disengaged mode) are usually done slowly by the firmware as the
243 * maximum ammount of fan duty cycle change per second seems to be
244 * limited.
245 *
246 * Reading is not available if GFAN exists.
247 * Writing is not available if SFAN exists.
248 *
249 * Bits
250 * 7 automatic mode engaged;
251 * (default operation mode of the ThinkPad)
252 * fan level is ignored in this mode.
253 * 6 disengage mode (takes precedence over bit 7);
254 * not available on all thinkpads. May disable
255 * the tachometer, and speeds up fan to 100% duty-cycle,
256 * which speeds it up far above the standard RPM
257 * levels. It is not impossible that it could cause
258 * hardware damage.
259 * 5-3 unused in some models. Extra bits for fan level
260 * in others, but still useless as all values above
261 * 7 map to the same speed as level 7 in these models.
262 * 2-0 fan level (0..7 usually)
263 * 0x00 = stop
264 * 0x07 = max (set when temperatures critical)
265 * Some ThinkPads may have other levels, see
266 * IBMACPI_FAN_WR_ACPI_FANS (X31/X40/X41)
267 *
268 * FIRMWARE BUG: on some models, EC 0x2f might not be initialized at
269 * boot. Apparently the EC does not intialize it, so unless ACPI DSDT
270 * does so, its initial value is meaningless (0x07).
271 *
272 * For firmware bugs, refer to:
273 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
274 *
275 * ----
276 *
277 * ThinkPad EC register 0x84 (LSB), 0x85 (MSB):
278 * Main fan tachometer reading (in RPM)
279 *
280 * This register is present on all ThinkPads with a new-style EC, and
281 * it is known not to be present on the A21m/e, and T22, as there is
282 * something else in offset 0x84 according to the ACPI DSDT. Other
283 * ThinkPads from this same time period (and earlier) probably lack the
284 * tachometer as well.
285 *
286 * Unfortunately a lot of ThinkPads with new-style ECs but whose firwmare
287 * was never fixed by IBM to report the EC firmware version string
288 * probably support the tachometer (like the early X models), so
289 * detecting it is quite hard. We need more data to know for sure.
290 *
291 * FIRMWARE BUG: always read 0x84 first, otherwise incorrect readings
292 * might result.
293 *
294 * FIRMWARE BUG: when EC 0x2f bit 6 is set (disengaged mode), this
295 * register is not invalidated in ThinkPads that disable tachometer
296 * readings. Thus, the tachometer readings go stale.
297 *
298 * For firmware bugs, refer to:
299 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
300 *
301 * IBMACPI_FAN_WR_ACPI_FANS:
302 * ThinkPad X31, X40, X41. Not available in the X60.
303 *
304 * FANS ACPI handle: takes three arguments: low speed, medium speed,
305 * high speed. ACPI DSDT seems to map these three speeds to levels
306 * as follows: STOP LOW LOW MED MED HIGH HIGH HIGH HIGH
307 * (this map is stored on FAN0..FAN8 as "0,1,1,2,2,3,3,3,3")
308 *
309 * The speeds are stored on handles
310 * (FANA:FAN9), (FANC:FANB), (FANE:FAND).
311 *
312 * There are three default speed sets, acessible as handles:
313 * FS1L,FS1M,FS1H; FS2L,FS2M,FS2H; FS3L,FS3M,FS3H
314 *
315 * ACPI DSDT switches which set is in use depending on various
316 * factors.
317 *
318 * IBMACPI_FAN_WR_TPEC is also available and should be used to
319 * command the fan. The X31/X40/X41 seems to have 8 fan levels,
320 * but the ACPI tables just mention level 7.
321 */
322
323 enum fan_status_access_mode {
324 IBMACPI_FAN_NONE = 0, /* No fan status or control */
325 IBMACPI_FAN_RD_ACPI_GFAN, /* Use ACPI GFAN */
326 IBMACPI_FAN_RD_TPEC, /* Use ACPI EC regs 0x2f, 0x84-0x85 */
327 };
328
329 enum fan_control_access_mode {
330 IBMACPI_FAN_WR_NONE = 0, /* No fan control */
331 IBMACPI_FAN_WR_ACPI_SFAN, /* Use ACPI SFAN */
332 IBMACPI_FAN_WR_TPEC, /* Use ACPI EC reg 0x2f */
333 IBMACPI_FAN_WR_ACPI_FANS, /* Use ACPI FANS and EC reg 0x2f */
334 };
335
336 enum fan_control_commands {
337 IBMACPI_FAN_CMD_SPEED = 0x0001, /* speed command */
338 IBMACPI_FAN_CMD_LEVEL = 0x0002, /* level command */
339 IBMACPI_FAN_CMD_ENABLE = 0x0004, /* enable/disable cmd,
340 * and also watchdog cmd */
341 };
342
343 enum { /* Fan control constants */
344 fan_status_offset = 0x2f, /* EC register 0x2f */
345 fan_rpm_offset = 0x84, /* EC register 0x84: LSB, 0x85 MSB (RPM)
346 * 0x84 must be read before 0x85 */
347
348 IBMACPI_FAN_EC_DISENGAGED = 0x40, /* EC mode: tachometer
349 * disengaged */
350 IBMACPI_FAN_EC_AUTO = 0x80, /* EC mode: auto fan
351 * control */
352 };
353
354 static char *ibm_thinkpad_ec_found = NULL;
355
356 struct ibm_struct {
357 char *name;
358 char param[32];
359
360 char *hid;
361 struct acpi_driver *driver;
362
363 int (*init) (void);
364 int (*read) (char *);
365 int (*write) (char *);
366 void (*exit) (void);
367
368 void (*notify) (struct ibm_struct *, u32);
369 acpi_handle *handle;
370 int type;
371 struct acpi_device *device;
372
373 int driver_registered;
374 int proc_created;
375 int init_called;
376 int notify_installed;
377
378 int experimental;
379 };
380
381 static struct proc_dir_entry *proc_dir = NULL;
382
383 static struct backlight_device *ibm_backlight_device = NULL;
384
385 #define onoff(status,bit) ((status) & (1 << (bit)) ? "on" : "off")
386 #define enabled(status,bit) ((status) & (1 << (bit)) ? "enabled" : "disabled")
387 #define strlencmp(a,b) (strncmp((a), (b), strlen(b)))
388
389 static int acpi_evalf(acpi_handle handle,
390 void *res, char *method, char *fmt, ...)
391 {
392 char *fmt0 = fmt;
393 struct acpi_object_list params;
394 union acpi_object in_objs[IBM_MAX_ACPI_ARGS];
395 struct acpi_buffer result, *resultp;
396 union acpi_object out_obj;
397 acpi_status status;
398 va_list ap;
399 char res_type;
400 int success;
401 int quiet;
402
403 if (!*fmt) {
404 printk(IBM_ERR "acpi_evalf() called with empty format\n");
405 return 0;
406 }
407
408 if (*fmt == 'q') {
409 quiet = 1;
410 fmt++;
411 } else
412 quiet = 0;
413
414 res_type = *(fmt++);
415
416 params.count = 0;
417 params.pointer = &in_objs[0];
418
419 va_start(ap, fmt);
420 while (*fmt) {
421 char c = *(fmt++);
422 switch (c) {
423 case 'd': /* int */
424 in_objs[params.count].integer.value = va_arg(ap, int);
425 in_objs[params.count++].type = ACPI_TYPE_INTEGER;
426 break;
427 /* add more types as needed */
428 default:
429 printk(IBM_ERR "acpi_evalf() called "
430 "with invalid format character '%c'\n", c);
431 return 0;
432 }
433 }
434 va_end(ap);
435
436 if (res_type != 'v') {
437 result.length = sizeof(out_obj);
438 result.pointer = &out_obj;
439 resultp = &result;
440 } else
441 resultp = NULL;
442
443 status = acpi_evaluate_object(handle, method, &params, resultp);
444
445 switch (res_type) {
446 case 'd': /* int */
447 if (res)
448 *(int *)res = out_obj.integer.value;
449 success = status == AE_OK && out_obj.type == ACPI_TYPE_INTEGER;
450 break;
451 case 'v': /* void */
452 success = status == AE_OK;
453 break;
454 /* add more types as needed */
455 default:
456 printk(IBM_ERR "acpi_evalf() called "
457 "with invalid format character '%c'\n", res_type);
458 return 0;
459 }
460
461 if (!success && !quiet)
462 printk(IBM_ERR "acpi_evalf(%s, %s, ...) failed: %d\n",
463 method, fmt0, status);
464
465 return success;
466 }
467
468 static void __unused acpi_print_int(acpi_handle handle, char *method)
469 {
470 int i;
471
472 if (acpi_evalf(handle, &i, method, "d"))
473 printk(IBM_INFO "%s = 0x%x\n", method, i);
474 else
475 printk(IBM_ERR "error calling %s\n", method);
476 }
477
478 static char *next_cmd(char **cmds)
479 {
480 char *start = *cmds;
481 char *end;
482
483 while ((end = strchr(start, ',')) && end == start)
484 start = end + 1;
485
486 if (!end)
487 return NULL;
488
489 *end = 0;
490 *cmds = end + 1;
491 return start;
492 }
493
494 static int ibm_acpi_driver_init(void)
495 {
496 printk(IBM_INFO "%s v%s\n", IBM_DESC, IBM_VERSION);
497 printk(IBM_INFO "%s\n", IBM_URL);
498
499 if (ibm_thinkpad_ec_found)
500 printk(IBM_INFO "ThinkPad EC firmware %s\n",
501 ibm_thinkpad_ec_found);
502
503 return 0;
504 }
505
506 static int driver_read(char *p)
507 {
508 int len = 0;
509
510 len += sprintf(p + len, "driver:\t\t%s\n", IBM_DESC);
511 len += sprintf(p + len, "version:\t%s\n", IBM_VERSION);
512
513 return len;
514 }
515
516 static int hotkey_supported;
517 static int hotkey_mask_supported;
518 static int hotkey_orig_status;
519 static int hotkey_orig_mask;
520
521 static int hotkey_get(int *status, int *mask)
522 {
523 if (!acpi_evalf(hkey_handle, status, "DHKC", "d"))
524 return 0;
525
526 if (hotkey_mask_supported)
527 if (!acpi_evalf(hkey_handle, mask, "DHKN", "d"))
528 return 0;
529
530 return 1;
531 }
532
533 static int hotkey_set(int status, int mask)
534 {
535 int i;
536
537 if (!acpi_evalf(hkey_handle, NULL, "MHKC", "vd", status))
538 return 0;
539
540 if (hotkey_mask_supported)
541 for (i = 0; i < 32; i++) {
542 int bit = ((1 << i) & mask) != 0;
543 if (!acpi_evalf(hkey_handle,
544 NULL, "MHKM", "vdd", i + 1, bit))
545 return 0;
546 }
547
548 return 1;
549 }
550
551 static int hotkey_init(void)
552 {
553 /* hotkey not supported on 570 */
554 hotkey_supported = hkey_handle != NULL;
555
556 if (hotkey_supported) {
557 /* mask not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
558 A30, R30, R31, T20-22, X20-21, X22-24 */
559 hotkey_mask_supported =
560 acpi_evalf(hkey_handle, NULL, "DHKN", "qv");
561
562 if (!hotkey_get(&hotkey_orig_status, &hotkey_orig_mask))
563 return -ENODEV;
564 }
565
566 return 0;
567 }
568
569 static int hotkey_read(char *p)
570 {
571 int status, mask;
572 int len = 0;
573
574 if (!hotkey_supported) {
575 len += sprintf(p + len, "status:\t\tnot supported\n");
576 return len;
577 }
578
579 if (!hotkey_get(&status, &mask))
580 return -EIO;
581
582 len += sprintf(p + len, "status:\t\t%s\n", enabled(status, 0));
583 if (hotkey_mask_supported) {
584 len += sprintf(p + len, "mask:\t\t0x%04x\n", mask);
585 len += sprintf(p + len,
586 "commands:\tenable, disable, reset, <mask>\n");
587 } else {
588 len += sprintf(p + len, "mask:\t\tnot supported\n");
589 len += sprintf(p + len, "commands:\tenable, disable, reset\n");
590 }
591
592 return len;
593 }
594
595 static int hotkey_write(char *buf)
596 {
597 int status, mask;
598 char *cmd;
599 int do_cmd = 0;
600
601 if (!hotkey_supported)
602 return -ENODEV;
603
604 if (!hotkey_get(&status, &mask))
605 return -EIO;
606
607 while ((cmd = next_cmd(&buf))) {
608 if (strlencmp(cmd, "enable") == 0) {
609 status = 1;
610 } else if (strlencmp(cmd, "disable") == 0) {
611 status = 0;
612 } else if (strlencmp(cmd, "reset") == 0) {
613 status = hotkey_orig_status;
614 mask = hotkey_orig_mask;
615 } else if (sscanf(cmd, "0x%x", &mask) == 1) {
616 /* mask set */
617 } else if (sscanf(cmd, "%x", &mask) == 1) {
618 /* mask set */
619 } else
620 return -EINVAL;
621 do_cmd = 1;
622 }
623
624 if (do_cmd && !hotkey_set(status, mask))
625 return -EIO;
626
627 return 0;
628 }
629
630 static void hotkey_exit(void)
631 {
632 if (hotkey_supported)
633 hotkey_set(hotkey_orig_status, hotkey_orig_mask);
634 }
635
636 static void hotkey_notify(struct ibm_struct *ibm, u32 event)
637 {
638 int hkey;
639
640 if (acpi_evalf(hkey_handle, &hkey, "MHKP", "d"))
641 acpi_bus_generate_event(ibm->device, event, hkey);
642 else {
643 printk(IBM_ERR "unknown hotkey event %d\n", event);
644 acpi_bus_generate_event(ibm->device, event, 0);
645 }
646 }
647
648 static int bluetooth_supported;
649
650 static int bluetooth_init(void)
651 {
652 /* bluetooth not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
653 G4x, R30, R31, R40e, R50e, T20-22, X20-21 */
654 bluetooth_supported = hkey_handle &&
655 acpi_evalf(hkey_handle, NULL, "GBDC", "qv");
656
657 return 0;
658 }
659
660 static int bluetooth_status(void)
661 {
662 int status;
663
664 if (!bluetooth_supported ||
665 !acpi_evalf(hkey_handle, &status, "GBDC", "d"))
666 status = 0;
667
668 return status;
669 }
670
671 static int bluetooth_read(char *p)
672 {
673 int len = 0;
674 int status = bluetooth_status();
675
676 if (!bluetooth_supported)
677 len += sprintf(p + len, "status:\t\tnot supported\n");
678 else if (!(status & 1))
679 len += sprintf(p + len, "status:\t\tnot installed\n");
680 else {
681 len += sprintf(p + len, "status:\t\t%s\n", enabled(status, 1));
682 len += sprintf(p + len, "commands:\tenable, disable\n");
683 }
684
685 return len;
686 }
687
688 static int bluetooth_write(char *buf)
689 {
690 int status = bluetooth_status();
691 char *cmd;
692 int do_cmd = 0;
693
694 if (!bluetooth_supported)
695 return -ENODEV;
696
697 while ((cmd = next_cmd(&buf))) {
698 if (strlencmp(cmd, "enable") == 0) {
699 status |= 2;
700 } else if (strlencmp(cmd, "disable") == 0) {
701 status &= ~2;
702 } else
703 return -EINVAL;
704 do_cmd = 1;
705 }
706
707 if (do_cmd && !acpi_evalf(hkey_handle, NULL, "SBDC", "vd", status))
708 return -EIO;
709
710 return 0;
711 }
712
713 static int wan_supported;
714
715 static int wan_init(void)
716 {
717 wan_supported = hkey_handle &&
718 acpi_evalf(hkey_handle, NULL, "GWAN", "qv");
719
720 return 0;
721 }
722
723 static int wan_status(void)
724 {
725 int status;
726
727 if (!wan_supported || !acpi_evalf(hkey_handle, &status, "GWAN", "d"))
728 status = 0;
729
730 return status;
731 }
732
733 static int wan_read(char *p)
734 {
735 int len = 0;
736 int status = wan_status();
737
738 if (!wan_supported)
739 len += sprintf(p + len, "status:\t\tnot supported\n");
740 else if (!(status & 1))
741 len += sprintf(p + len, "status:\t\tnot installed\n");
742 else {
743 len += sprintf(p + len, "status:\t\t%s\n", enabled(status, 1));
744 len += sprintf(p + len, "commands:\tenable, disable\n");
745 }
746
747 return len;
748 }
749
750 static int wan_write(char *buf)
751 {
752 int status = wan_status();
753 char *cmd;
754 int do_cmd = 0;
755
756 if (!wan_supported)
757 return -ENODEV;
758
759 while ((cmd = next_cmd(&buf))) {
760 if (strlencmp(cmd, "enable") == 0) {
761 status |= 2;
762 } else if (strlencmp(cmd, "disable") == 0) {
763 status &= ~2;
764 } else
765 return -EINVAL;
766 do_cmd = 1;
767 }
768
769 if (do_cmd && !acpi_evalf(hkey_handle, NULL, "SWAN", "vd", status))
770 return -EIO;
771
772 return 0;
773 }
774
775 enum video_access_mode {
776 IBMACPI_VIDEO_NONE = 0,
777 IBMACPI_VIDEO_570, /* 570 */
778 IBMACPI_VIDEO_770, /* 600e/x, 770e, 770x */
779 IBMACPI_VIDEO_NEW, /* all others */
780 };
781
782 static enum video_access_mode video_supported;
783 static int video_orig_autosw;
784
785 static int video_init(void)
786 {
787 int ivga;
788
789 if (vid2_handle && acpi_evalf(NULL, &ivga, "\\IVGA", "d") && ivga)
790 /* G41, assume IVGA doesn't change */
791 vid_handle = vid2_handle;
792
793 if (!vid_handle)
794 /* video switching not supported on R30, R31 */
795 video_supported = IBMACPI_VIDEO_NONE;
796 else if (acpi_evalf(vid_handle, &video_orig_autosw, "SWIT", "qd"))
797 /* 570 */
798 video_supported = IBMACPI_VIDEO_570;
799 else if (acpi_evalf(vid_handle, &video_orig_autosw, "^VADL", "qd"))
800 /* 600e/x, 770e, 770x */
801 video_supported = IBMACPI_VIDEO_770;
802 else
803 /* all others */
804 video_supported = IBMACPI_VIDEO_NEW;
805
806 return 0;
807 }
808
809 static int video_status(void)
810 {
811 int status = 0;
812 int i;
813
814 if (video_supported == IBMACPI_VIDEO_570) {
815 if (acpi_evalf(NULL, &i, "\\_SB.PHS", "dd", 0x87))
816 status = i & 3;
817 } else if (video_supported == IBMACPI_VIDEO_770) {
818 if (acpi_evalf(NULL, &i, "\\VCDL", "d"))
819 status |= 0x01 * i;
820 if (acpi_evalf(NULL, &i, "\\VCDC", "d"))
821 status |= 0x02 * i;
822 } else if (video_supported == IBMACPI_VIDEO_NEW) {
823 acpi_evalf(NULL, NULL, "\\VUPS", "vd", 1);
824 if (acpi_evalf(NULL, &i, "\\VCDC", "d"))
825 status |= 0x02 * i;
826
827 acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0);
828 if (acpi_evalf(NULL, &i, "\\VCDL", "d"))
829 status |= 0x01 * i;
830 if (acpi_evalf(NULL, &i, "\\VCDD", "d"))
831 status |= 0x08 * i;
832 }
833
834 return status;
835 }
836
837 static int video_autosw(void)
838 {
839 int autosw = 0;
840
841 if (video_supported == IBMACPI_VIDEO_570)
842 acpi_evalf(vid_handle, &autosw, "SWIT", "d");
843 else if (video_supported == IBMACPI_VIDEO_770 ||
844 video_supported == IBMACPI_VIDEO_NEW)
845 acpi_evalf(vid_handle, &autosw, "^VDEE", "d");
846
847 return autosw & 1;
848 }
849
850 static int video_read(char *p)
851 {
852 int status = video_status();
853 int autosw = video_autosw();
854 int len = 0;
855
856 if (!video_supported) {
857 len += sprintf(p + len, "status:\t\tnot supported\n");
858 return len;
859 }
860
861 len += sprintf(p + len, "status:\t\tsupported\n");
862 len += sprintf(p + len, "lcd:\t\t%s\n", enabled(status, 0));
863 len += sprintf(p + len, "crt:\t\t%s\n", enabled(status, 1));
864 if (video_supported == IBMACPI_VIDEO_NEW)
865 len += sprintf(p + len, "dvi:\t\t%s\n", enabled(status, 3));
866 len += sprintf(p + len, "auto:\t\t%s\n", enabled(autosw, 0));
867 len += sprintf(p + len, "commands:\tlcd_enable, lcd_disable\n");
868 len += sprintf(p + len, "commands:\tcrt_enable, crt_disable\n");
869 if (video_supported == IBMACPI_VIDEO_NEW)
870 len += sprintf(p + len, "commands:\tdvi_enable, dvi_disable\n");
871 len += sprintf(p + len, "commands:\tauto_enable, auto_disable\n");
872 len += sprintf(p + len, "commands:\tvideo_switch, expand_toggle\n");
873
874 return len;
875 }
876
877 static int video_switch(void)
878 {
879 int autosw = video_autosw();
880 int ret;
881
882 if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", 1))
883 return -EIO;
884 ret = video_supported == IBMACPI_VIDEO_570 ?
885 acpi_evalf(ec_handle, NULL, "_Q16", "v") :
886 acpi_evalf(vid_handle, NULL, "VSWT", "v");
887 acpi_evalf(vid_handle, NULL, "_DOS", "vd", autosw);
888
889 return ret;
890 }
891
892 static int video_expand(void)
893 {
894 if (video_supported == IBMACPI_VIDEO_570)
895 return acpi_evalf(ec_handle, NULL, "_Q17", "v");
896 else if (video_supported == IBMACPI_VIDEO_770)
897 return acpi_evalf(vid_handle, NULL, "VEXP", "v");
898 else
899 return acpi_evalf(NULL, NULL, "\\VEXP", "v");
900 }
901
902 static int video_switch2(int status)
903 {
904 int ret;
905
906 if (video_supported == IBMACPI_VIDEO_570) {
907 ret = acpi_evalf(NULL, NULL,
908 "\\_SB.PHS2", "vdd", 0x8b, status | 0x80);
909 } else if (video_supported == IBMACPI_VIDEO_770) {
910 int autosw = video_autosw();
911 if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", 1))
912 return -EIO;
913
914 ret = acpi_evalf(vid_handle, NULL,
915 "ASWT", "vdd", status * 0x100, 0);
916
917 acpi_evalf(vid_handle, NULL, "_DOS", "vd", autosw);
918 } else {
919 ret = acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0x80) &&
920 acpi_evalf(NULL, NULL, "\\VSDS", "vdd", status, 1);
921 }
922
923 return ret;
924 }
925
926 static int video_write(char *buf)
927 {
928 char *cmd;
929 int enable, disable, status;
930
931 if (!video_supported)
932 return -ENODEV;
933
934 enable = disable = 0;
935
936 while ((cmd = next_cmd(&buf))) {
937 if (strlencmp(cmd, "lcd_enable") == 0) {
938 enable |= 0x01;
939 } else if (strlencmp(cmd, "lcd_disable") == 0) {
940 disable |= 0x01;
941 } else if (strlencmp(cmd, "crt_enable") == 0) {
942 enable |= 0x02;
943 } else if (strlencmp(cmd, "crt_disable") == 0) {
944 disable |= 0x02;
945 } else if (video_supported == IBMACPI_VIDEO_NEW &&
946 strlencmp(cmd, "dvi_enable") == 0) {
947 enable |= 0x08;
948 } else if (video_supported == IBMACPI_VIDEO_NEW &&
949 strlencmp(cmd, "dvi_disable") == 0) {
950 disable |= 0x08;
951 } else if (strlencmp(cmd, "auto_enable") == 0) {
952 if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", 1))
953 return -EIO;
954 } else if (strlencmp(cmd, "auto_disable") == 0) {
955 if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", 0))
956 return -EIO;
957 } else if (strlencmp(cmd, "video_switch") == 0) {
958 if (!video_switch())
959 return -EIO;
960 } else if (strlencmp(cmd, "expand_toggle") == 0) {
961 if (!video_expand())
962 return -EIO;
963 } else
964 return -EINVAL;
965 }
966
967 if (enable || disable) {
968 status = (video_status() & 0x0f & ~disable) | enable;
969 if (!video_switch2(status))
970 return -EIO;
971 }
972
973 return 0;
974 }
975
976 static void video_exit(void)
977 {
978 acpi_evalf(vid_handle, NULL, "_DOS", "vd", video_orig_autosw);
979 }
980
981 static int light_supported;
982 static int light_status_supported;
983
984 static int light_init(void)
985 {
986 /* light not supported on 570, 600e/x, 770e, 770x, G4x, R30, R31 */
987 light_supported = (cmos_handle || lght_handle) && !ledb_handle;
988
989 if (light_supported)
990 /* light status not supported on
991 570, 600e/x, 770e, 770x, G4x, R30, R31, R32, X20 */
992 light_status_supported = acpi_evalf(ec_handle, NULL,
993 "KBLT", "qv");
994
995 return 0;
996 }
997
998 static int light_read(char *p)
999 {
1000 int len = 0;
1001 int status = 0;
1002
1003 if (!light_supported) {
1004 len += sprintf(p + len, "status:\t\tnot supported\n");
1005 } else if (!light_status_supported) {
1006 len += sprintf(p + len, "status:\t\tunknown\n");
1007 len += sprintf(p + len, "commands:\ton, off\n");
1008 } else {
1009 if (!acpi_evalf(ec_handle, &status, "KBLT", "d"))
1010 return -EIO;
1011 len += sprintf(p + len, "status:\t\t%s\n", onoff(status, 0));
1012 len += sprintf(p + len, "commands:\ton, off\n");
1013 }
1014
1015 return len;
1016 }
1017
1018 static int light_write(char *buf)
1019 {
1020 int cmos_cmd, lght_cmd;
1021 char *cmd;
1022 int success;
1023
1024 if (!light_supported)
1025 return -ENODEV;
1026
1027 while ((cmd = next_cmd(&buf))) {
1028 if (strlencmp(cmd, "on") == 0) {
1029 cmos_cmd = 0x0c;
1030 lght_cmd = 1;
1031 } else if (strlencmp(cmd, "off") == 0) {
1032 cmos_cmd = 0x0d;
1033 lght_cmd = 0;
1034 } else
1035 return -EINVAL;
1036
1037 success = cmos_handle ?
1038 acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd) :
1039 acpi_evalf(lght_handle, NULL, NULL, "vd", lght_cmd);
1040 if (!success)
1041 return -EIO;
1042 }
1043
1044 return 0;
1045 }
1046
1047 static int _sta(acpi_handle handle)
1048 {
1049 int status;
1050
1051 if (!handle || !acpi_evalf(handle, &status, "_STA", "d"))
1052 status = 0;
1053
1054 return status;
1055 }
1056
1057 #ifdef CONFIG_ACPI_IBM_DOCK
1058 #define dock_docked() (_sta(dock_handle) & 1)
1059
1060 static int dock_read(char *p)
1061 {
1062 int len = 0;
1063 int docked = dock_docked();
1064
1065 if (!dock_handle)
1066 len += sprintf(p + len, "status:\t\tnot supported\n");
1067 else if (!docked)
1068 len += sprintf(p + len, "status:\t\tundocked\n");
1069 else {
1070 len += sprintf(p + len, "status:\t\tdocked\n");
1071 len += sprintf(p + len, "commands:\tdock, undock\n");
1072 }
1073
1074 return len;
1075 }
1076
1077 static int dock_write(char *buf)
1078 {
1079 char *cmd;
1080
1081 if (!dock_docked())
1082 return -ENODEV;
1083
1084 while ((cmd = next_cmd(&buf))) {
1085 if (strlencmp(cmd, "undock") == 0) {
1086 if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 0) ||
1087 !acpi_evalf(dock_handle, NULL, "_EJ0", "vd", 1))
1088 return -EIO;
1089 } else if (strlencmp(cmd, "dock") == 0) {
1090 if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 1))
1091 return -EIO;
1092 } else
1093 return -EINVAL;
1094 }
1095
1096 return 0;
1097 }
1098
1099 static void dock_notify(struct ibm_struct *ibm, u32 event)
1100 {
1101 int docked = dock_docked();
1102 int pci = ibm->hid && strstr(ibm->hid, IBM_PCI_HID);
1103
1104 if (event == 1 && !pci) /* 570 */
1105 acpi_bus_generate_event(ibm->device, event, 1); /* button */
1106 else if (event == 1 && pci) /* 570 */
1107 acpi_bus_generate_event(ibm->device, event, 3); /* dock */
1108 else if (event == 3 && docked)
1109 acpi_bus_generate_event(ibm->device, event, 1); /* button */
1110 else if (event == 3 && !docked)
1111 acpi_bus_generate_event(ibm->device, event, 2); /* undock */
1112 else if (event == 0 && docked)
1113 acpi_bus_generate_event(ibm->device, event, 3); /* dock */
1114 else {
1115 printk(IBM_ERR "unknown dock event %d, status %d\n",
1116 event, _sta(dock_handle));
1117 acpi_bus_generate_event(ibm->device, event, 0); /* unknown */
1118 }
1119 }
1120 #endif
1121
1122 static int bay_status_supported;
1123 static int bay_status2_supported;
1124 static int bay_eject_supported;
1125 static int bay_eject2_supported;
1126
1127 static int bay_init(void)
1128 {
1129 bay_status_supported = bay_handle &&
1130 acpi_evalf(bay_handle, NULL, "_STA", "qv");
1131 bay_status2_supported = bay2_handle &&
1132 acpi_evalf(bay2_handle, NULL, "_STA", "qv");
1133
1134 bay_eject_supported = bay_handle && bay_ej_handle &&
1135 (strlencmp(bay_ej_path, "_EJ0") == 0 || experimental);
1136 bay_eject2_supported = bay2_handle && bay2_ej_handle &&
1137 (strlencmp(bay2_ej_path, "_EJ0") == 0 || experimental);
1138
1139 return 0;
1140 }
1141
1142 #define bay_occupied(b) (_sta(b##_handle) & 1)
1143
1144 static int bay_read(char *p)
1145 {
1146 int len = 0;
1147 int occupied = bay_occupied(bay);
1148 int occupied2 = bay_occupied(bay2);
1149 int eject, eject2;
1150
1151 len += sprintf(p + len, "status:\t\t%s\n", bay_status_supported ?
1152 (occupied ? "occupied" : "unoccupied") :
1153 "not supported");
1154 if (bay_status2_supported)
1155 len += sprintf(p + len, "status2:\t%s\n", occupied2 ?
1156 "occupied" : "unoccupied");
1157
1158 eject = bay_eject_supported && occupied;
1159 eject2 = bay_eject2_supported && occupied2;
1160
1161 if (eject && eject2)
1162 len += sprintf(p + len, "commands:\teject, eject2\n");
1163 else if (eject)
1164 len += sprintf(p + len, "commands:\teject\n");
1165 else if (eject2)
1166 len += sprintf(p + len, "commands:\teject2\n");
1167
1168 return len;
1169 }
1170
1171 static int bay_write(char *buf)
1172 {
1173 char *cmd;
1174
1175 if (!bay_eject_supported && !bay_eject2_supported)
1176 return -ENODEV;
1177
1178 while ((cmd = next_cmd(&buf))) {
1179 if (bay_eject_supported && strlencmp(cmd, "eject") == 0) {
1180 if (!acpi_evalf(bay_ej_handle, NULL, NULL, "vd", 1))
1181 return -EIO;
1182 } else if (bay_eject2_supported &&
1183 strlencmp(cmd, "eject2") == 0) {
1184 if (!acpi_evalf(bay2_ej_handle, NULL, NULL, "vd", 1))
1185 return -EIO;
1186 } else
1187 return -EINVAL;
1188 }
1189
1190 return 0;
1191 }
1192
1193 static void bay_notify(struct ibm_struct *ibm, u32 event)
1194 {
1195 acpi_bus_generate_event(ibm->device, event, 0);
1196 }
1197
1198 static int cmos_read(char *p)
1199 {
1200 int len = 0;
1201
1202 /* cmos not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
1203 R30, R31, T20-22, X20-21 */
1204 if (!cmos_handle)
1205 len += sprintf(p + len, "status:\t\tnot supported\n");
1206 else {
1207 len += sprintf(p + len, "status:\t\tsupported\n");
1208 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-21)\n");
1209 }
1210
1211 return len;
1212 }
1213
1214 static int cmos_eval(int cmos_cmd)
1215 {
1216 if (cmos_handle)
1217 return acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd);
1218 else
1219 return 1;
1220 }
1221
1222 static int cmos_write(char *buf)
1223 {
1224 char *cmd;
1225 int cmos_cmd;
1226
1227 if (!cmos_handle)
1228 return -EINVAL;
1229
1230 while ((cmd = next_cmd(&buf))) {
1231 if (sscanf(cmd, "%u", &cmos_cmd) == 1 &&
1232 cmos_cmd >= 0 && cmos_cmd <= 21) {
1233 /* cmos_cmd set */
1234 } else
1235 return -EINVAL;
1236
1237 if (!cmos_eval(cmos_cmd))
1238 return -EIO;
1239 }
1240
1241 return 0;
1242 }
1243
1244 enum led_access_mode {
1245 IBMACPI_LED_NONE = 0,
1246 IBMACPI_LED_570, /* 570 */
1247 IBMACPI_LED_OLD, /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
1248 IBMACPI_LED_NEW, /* all others */
1249 };
1250 static enum led_access_mode led_supported;
1251
1252 static int led_init(void)
1253 {
1254 if (!led_handle)
1255 /* led not supported on R30, R31 */
1256 led_supported = IBMACPI_LED_NONE;
1257 else if (strlencmp(led_path, "SLED") == 0)
1258 /* 570 */
1259 led_supported = IBMACPI_LED_570;
1260 else if (strlencmp(led_path, "SYSL") == 0)
1261 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
1262 led_supported = IBMACPI_LED_OLD;
1263 else
1264 /* all others */
1265 led_supported = IBMACPI_LED_NEW;
1266
1267 return 0;
1268 }
1269
1270 #define led_status(s) ((s) == 0 ? "off" : ((s) == 1 ? "on" : "blinking"))
1271
1272 static int led_read(char *p)
1273 {
1274 int len = 0;
1275
1276 if (!led_supported) {
1277 len += sprintf(p + len, "status:\t\tnot supported\n");
1278 return len;
1279 }
1280 len += sprintf(p + len, "status:\t\tsupported\n");
1281
1282 if (led_supported == IBMACPI_LED_570) {
1283 /* 570 */
1284 int i, status;
1285 for (i = 0; i < 8; i++) {
1286 if (!acpi_evalf(ec_handle,
1287 &status, "GLED", "dd", 1 << i))
1288 return -EIO;
1289 len += sprintf(p + len, "%d:\t\t%s\n",
1290 i, led_status(status));
1291 }
1292 }
1293
1294 len += sprintf(p + len, "commands:\t"
1295 "<led> on, <led> off, <led> blink (<led> is 0-7)\n");
1296
1297 return len;
1298 }
1299
1300 /* off, on, blink */
1301 static const int led_sled_arg1[] = { 0, 1, 3 };
1302 static const int led_exp_hlbl[] = { 0, 0, 1 }; /* led# * */
1303 static const int led_exp_hlcl[] = { 0, 1, 1 }; /* led# * */
1304 static const int led_led_arg1[] = { 0, 0x80, 0xc0 };
1305
1306 #define EC_HLCL 0x0c
1307 #define EC_HLBL 0x0d
1308 #define EC_HLMS 0x0e
1309
1310 static int led_write(char *buf)
1311 {
1312 char *cmd;
1313 int led, ind, ret;
1314
1315 if (!led_supported)
1316 return -ENODEV;
1317
1318 while ((cmd = next_cmd(&buf))) {
1319 if (sscanf(cmd, "%d", &led) != 1 || led < 0 || led > 7)
1320 return -EINVAL;
1321
1322 if (strstr(cmd, "off")) {
1323 ind = 0;
1324 } else if (strstr(cmd, "on")) {
1325 ind = 1;
1326 } else if (strstr(cmd, "blink")) {
1327 ind = 2;
1328 } else
1329 return -EINVAL;
1330
1331 if (led_supported == IBMACPI_LED_570) {
1332 /* 570 */
1333 led = 1 << led;
1334 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
1335 led, led_sled_arg1[ind]))
1336 return -EIO;
1337 } else if (led_supported == IBMACPI_LED_OLD) {
1338 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */
1339 led = 1 << led;
1340 ret = ec_write(EC_HLMS, led);
1341 if (ret >= 0)
1342 ret =
1343 ec_write(EC_HLBL, led * led_exp_hlbl[ind]);
1344 if (ret >= 0)
1345 ret =
1346 ec_write(EC_HLCL, led * led_exp_hlcl[ind]);
1347 if (ret < 0)
1348 return ret;
1349 } else {
1350 /* all others */
1351 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
1352 led, led_led_arg1[ind]))
1353 return -EIO;
1354 }
1355 }
1356
1357 return 0;
1358 }
1359
1360 static int beep_read(char *p)
1361 {
1362 int len = 0;
1363
1364 if (!beep_handle)
1365 len += sprintf(p + len, "status:\t\tnot supported\n");
1366 else {
1367 len += sprintf(p + len, "status:\t\tsupported\n");
1368 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-17)\n");
1369 }
1370
1371 return len;
1372 }
1373
1374 static int beep_write(char *buf)
1375 {
1376 char *cmd;
1377 int beep_cmd;
1378
1379 if (!beep_handle)
1380 return -ENODEV;
1381
1382 while ((cmd = next_cmd(&buf))) {
1383 if (sscanf(cmd, "%u", &beep_cmd) == 1 &&
1384 beep_cmd >= 0 && beep_cmd <= 17) {
1385 /* beep_cmd set */
1386 } else
1387 return -EINVAL;
1388 if (!acpi_evalf(beep_handle, NULL, NULL, "vdd", beep_cmd, 0))
1389 return -EIO;
1390 }
1391
1392 return 0;
1393 }
1394
1395 static int acpi_ec_read(int i, u8 * p)
1396 {
1397 int v;
1398
1399 if (ecrd_handle) {
1400 if (!acpi_evalf(ecrd_handle, &v, NULL, "dd", i))
1401 return 0;
1402 *p = v;
1403 } else {
1404 if (ec_read(i, p) < 0)
1405 return 0;
1406 }
1407
1408 return 1;
1409 }
1410
1411 static int acpi_ec_write(int i, u8 v)
1412 {
1413 if (ecwr_handle) {
1414 if (!acpi_evalf(ecwr_handle, NULL, NULL, "vdd", i, v))
1415 return 0;
1416 } else {
1417 if (ec_write(i, v) < 0)
1418 return 0;
1419 }
1420
1421 return 1;
1422 }
1423
1424 static enum thermal_access_mode thermal_read_mode;
1425
1426 static int thermal_init(void)
1427 {
1428 u8 t, ta1, ta2;
1429 int i;
1430 int acpi_tmp7 = acpi_evalf(ec_handle, NULL, "TMP7", "qv");
1431
1432 if (ibm_thinkpad_ec_found && experimental) {
1433 /*
1434 * Direct EC access mode: sensors at registers
1435 * 0x78-0x7F, 0xC0-0xC7. Registers return 0x00 for
1436 * non-implemented, thermal sensors return 0x80 when
1437 * not available
1438 */
1439
1440 ta1 = ta2 = 0;
1441 for (i = 0; i < 8; i++) {
1442 if (likely(acpi_ec_read(0x78 + i, &t))) {
1443 ta1 |= t;
1444 } else {
1445 ta1 = 0;
1446 break;
1447 }
1448 if (likely(acpi_ec_read(0xC0 + i, &t))) {
1449 ta2 |= t;
1450 } else {
1451 ta1 = 0;
1452 break;
1453 }
1454 }
1455 if (ta1 == 0) {
1456 /* This is sheer paranoia, but we handle it anyway */
1457 if (acpi_tmp7) {
1458 printk(IBM_ERR
1459 "ThinkPad ACPI EC access misbehaving, "
1460 "falling back to ACPI TMPx access mode\n");
1461 thermal_read_mode = IBMACPI_THERMAL_ACPI_TMP07;
1462 } else {
1463 printk(IBM_ERR
1464 "ThinkPad ACPI EC access misbehaving, "
1465 "disabling thermal sensors access\n");
1466 thermal_read_mode = IBMACPI_THERMAL_NONE;
1467 }
1468 } else {
1469 thermal_read_mode =
1470 (ta2 != 0) ?
1471 IBMACPI_THERMAL_TPEC_16 : IBMACPI_THERMAL_TPEC_8;
1472 }
1473 } else if (acpi_tmp7) {
1474 if (acpi_evalf(ec_handle, NULL, "UPDT", "qv")) {
1475 /* 600e/x, 770e, 770x */
1476 thermal_read_mode = IBMACPI_THERMAL_ACPI_UPDT;
1477 } else {
1478 /* Standard ACPI TMPx access, max 8 sensors */
1479 thermal_read_mode = IBMACPI_THERMAL_ACPI_TMP07;
1480 }
1481 } else {
1482 /* temperatures not supported on 570, G4x, R30, R31, R32 */
1483 thermal_read_mode = IBMACPI_THERMAL_NONE;
1484 }
1485
1486 return 0;
1487 }
1488
1489 static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s)
1490 {
1491 int i, t;
1492 s8 tmp;
1493 char tmpi[] = "TMPi";
1494
1495 if (!s)
1496 return -EINVAL;
1497
1498 switch (thermal_read_mode) {
1499 #if IBMACPI_MAX_THERMAL_SENSORS >= 16
1500 case IBMACPI_THERMAL_TPEC_16:
1501 for (i = 0; i < 8; i++) {
1502 if (!acpi_ec_read(0xC0 + i, &tmp))
1503 return -EIO;
1504 s->temp[i + 8] = tmp * 1000;
1505 }
1506 /* fallthrough */
1507 #endif
1508 case IBMACPI_THERMAL_TPEC_8:
1509 for (i = 0; i < 8; i++) {
1510 if (!acpi_ec_read(0x78 + i, &tmp))
1511 return -EIO;
1512 s->temp[i] = tmp * 1000;
1513 }
1514 return (thermal_read_mode == IBMACPI_THERMAL_TPEC_16) ? 16 : 8;
1515
1516 case IBMACPI_THERMAL_ACPI_UPDT:
1517 if (!acpi_evalf(ec_handle, NULL, "UPDT", "v"))
1518 return -EIO;
1519 for (i = 0; i < 8; i++) {
1520 tmpi[3] = '0' + i;
1521 if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
1522 return -EIO;
1523 s->temp[i] = (t - 2732) * 100;
1524 }
1525 return 8;
1526
1527 case IBMACPI_THERMAL_ACPI_TMP07:
1528 for (i = 0; i < 8; i++) {
1529 tmpi[3] = '0' + i;
1530 if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
1531 return -EIO;
1532 s->temp[i] = t * 1000;
1533 }
1534 return 8;
1535
1536 case IBMACPI_THERMAL_NONE:
1537 default:
1538 return 0;
1539 }
1540 }
1541
1542 static int thermal_read(char *p)
1543 {
1544 int len = 0;
1545 int n, i;
1546 struct ibm_thermal_sensors_struct t;
1547
1548 n = thermal_get_sensors(&t);
1549 if (unlikely(n < 0))
1550 return n;
1551
1552 len += sprintf(p + len, "temperatures:\t");
1553
1554 if (n > 0) {
1555 for (i = 0; i < (n - 1); i++)
1556 len += sprintf(p + len, "%d ", t.temp[i] / 1000);
1557 len += sprintf(p + len, "%d\n", t.temp[i] / 1000);
1558 } else
1559 len += sprintf(p + len, "not supported\n");
1560
1561 return len;
1562 }
1563
1564 static u8 ecdump_regs[256];
1565
1566 static int ecdump_read(char *p)
1567 {
1568 int len = 0;
1569 int i, j;
1570 u8 v;
1571
1572 len += sprintf(p + len, "EC "
1573 " +00 +01 +02 +03 +04 +05 +06 +07"
1574 " +08 +09 +0a +0b +0c +0d +0e +0f\n");
1575 for (i = 0; i < 256; i += 16) {
1576 len += sprintf(p + len, "EC 0x%02x:", i);
1577 for (j = 0; j < 16; j++) {
1578 if (!acpi_ec_read(i + j, &v))
1579 break;
1580 if (v != ecdump_regs[i + j])
1581 len += sprintf(p + len, " *%02x", v);
1582 else
1583 len += sprintf(p + len, " %02x", v);
1584 ecdump_regs[i + j] = v;
1585 }
1586 len += sprintf(p + len, "\n");
1587 if (j != 16)
1588 break;
1589 }
1590
1591 /* These are way too dangerous to advertise openly... */
1592 #if 0
1593 len += sprintf(p + len, "commands:\t0x<offset> 0x<value>"
1594 " (<offset> is 00-ff, <value> is 00-ff)\n");
1595 len += sprintf(p + len, "commands:\t0x<offset> <value> "
1596 " (<offset> is 00-ff, <value> is 0-255)\n");
1597 #endif
1598 return len;
1599 }
1600
1601 static int ecdump_write(char *buf)
1602 {
1603 char *cmd;
1604 int i, v;
1605
1606 while ((cmd = next_cmd(&buf))) {
1607 if (sscanf(cmd, "0x%x 0x%x", &i, &v) == 2) {
1608 /* i and v set */
1609 } else if (sscanf(cmd, "0x%x %u", &i, &v) == 2) {
1610 /* i and v set */
1611 } else
1612 return -EINVAL;
1613 if (i >= 0 && i < 256 && v >= 0 && v < 256) {
1614 if (!acpi_ec_write(i, v))
1615 return -EIO;
1616 } else
1617 return -EINVAL;
1618 }
1619
1620 return 0;
1621 }
1622
1623 static int brightness_offset = 0x31;
1624
1625 static int brightness_get(struct backlight_device *bd)
1626 {
1627 u8 level;
1628 if (!acpi_ec_read(brightness_offset, &level))
1629 return -EIO;
1630
1631 level &= 0x7;
1632
1633 return level;
1634 }
1635
1636 static int brightness_read(char *p)
1637 {
1638 int len = 0;
1639 int level;
1640
1641 if ((level = brightness_get(NULL)) < 0) {
1642 len += sprintf(p + len, "level:\t\tunreadable\n");
1643 } else {
1644 len += sprintf(p + len, "level:\t\t%d\n", level & 0x7);
1645 len += sprintf(p + len, "commands:\tup, down\n");
1646 len += sprintf(p + len, "commands:\tlevel <level>"
1647 " (<level> is 0-7)\n");
1648 }
1649
1650 return len;
1651 }
1652
1653 #define BRIGHTNESS_UP 4
1654 #define BRIGHTNESS_DOWN 5
1655
1656 static int brightness_set(int value)
1657 {
1658 int cmos_cmd, inc, i;
1659 int current_value = brightness_get(NULL);
1660
1661 value &= 7;
1662
1663 cmos_cmd = value > current_value ? BRIGHTNESS_UP : BRIGHTNESS_DOWN;
1664 inc = value > current_value ? 1 : -1;
1665 for (i = current_value; i != value; i += inc) {
1666 if (!cmos_eval(cmos_cmd))
1667 return -EIO;
1668 if (!acpi_ec_write(brightness_offset, i + inc))
1669 return -EIO;
1670 }
1671
1672 return 0;
1673 }
1674
1675 static int brightness_write(char *buf)
1676 {
1677 int level;
1678 int new_level;
1679 char *cmd;
1680
1681 while ((cmd = next_cmd(&buf))) {
1682 if ((level = brightness_get(NULL)) < 0)
1683 return level;
1684 level &= 7;
1685
1686 if (strlencmp(cmd, "up") == 0) {
1687 new_level = level == 7 ? 7 : level + 1;
1688 } else if (strlencmp(cmd, "down") == 0) {
1689 new_level = level == 0 ? 0 : level - 1;
1690 } else if (sscanf(cmd, "level %d", &new_level) == 1 &&
1691 new_level >= 0 && new_level <= 7) {
1692 /* new_level set */
1693 } else
1694 return -EINVAL;
1695
1696 brightness_set(new_level);
1697 }
1698
1699 return 0;
1700 }
1701
1702 static int brightness_update_status(struct backlight_device *bd)
1703 {
1704 return brightness_set(bd->props->brightness);
1705 }
1706
1707 static struct backlight_properties ibm_backlight_data = {
1708 .get_brightness = brightness_get,
1709 .update_status = brightness_update_status,
1710 .max_brightness = 7,
1711 };
1712
1713 static int brightness_init(void)
1714 {
1715 ibm_backlight_device = backlight_device_register("ibm", NULL, NULL,
1716 &ibm_backlight_data);
1717 if (IS_ERR(ibm_backlight_device)) {
1718 printk(IBM_ERR "Could not register backlight device\n");
1719 return PTR_ERR(ibm_backlight_device);
1720 }
1721
1722 return 0;
1723 }
1724
1725 static void brightness_exit(void)
1726 {
1727 if (ibm_backlight_device) {
1728 backlight_device_unregister(ibm_backlight_device);
1729 ibm_backlight_device = NULL;
1730 }
1731 }
1732
1733 static int volume_offset = 0x30;
1734
1735 static int volume_read(char *p)
1736 {
1737 int len = 0;
1738 u8 level;
1739
1740 if (!acpi_ec_read(volume_offset, &level)) {
1741 len += sprintf(p + len, "level:\t\tunreadable\n");
1742 } else {
1743 len += sprintf(p + len, "level:\t\t%d\n", level & 0xf);
1744 len += sprintf(p + len, "mute:\t\t%s\n", onoff(level, 6));
1745 len += sprintf(p + len, "commands:\tup, down, mute\n");
1746 len += sprintf(p + len, "commands:\tlevel <level>"
1747 " (<level> is 0-15)\n");
1748 }
1749
1750 return len;
1751 }
1752
1753 #define VOLUME_DOWN 0
1754 #define VOLUME_UP 1
1755 #define VOLUME_MUTE 2
1756
1757 static int volume_write(char *buf)
1758 {
1759 int cmos_cmd, inc, i;
1760 u8 level, mute;
1761 int new_level, new_mute;
1762 char *cmd;
1763
1764 while ((cmd = next_cmd(&buf))) {
1765 if (!acpi_ec_read(volume_offset, &level))
1766 return -EIO;
1767 new_mute = mute = level & 0x40;
1768 new_level = level = level & 0xf;
1769
1770 if (strlencmp(cmd, "up") == 0) {
1771 if (mute)
1772 new_mute = 0;
1773 else
1774 new_level = level == 15 ? 15 : level + 1;
1775 } else if (strlencmp(cmd, "down") == 0) {
1776 if (mute)
1777 new_mute = 0;
1778 else
1779 new_level = level == 0 ? 0 : level - 1;
1780 } else if (sscanf(cmd, "level %d", &new_level) == 1 &&
1781 new_level >= 0 && new_level <= 15) {
1782 /* new_level set */
1783 } else if (strlencmp(cmd, "mute") == 0) {
1784 new_mute = 0x40;
1785 } else
1786 return -EINVAL;
1787
1788 if (new_level != level) { /* mute doesn't change */
1789 cmos_cmd = new_level > level ? VOLUME_UP : VOLUME_DOWN;
1790 inc = new_level > level ? 1 : -1;
1791
1792 if (mute && (!cmos_eval(cmos_cmd) ||
1793 !acpi_ec_write(volume_offset, level)))
1794 return -EIO;
1795
1796 for (i = level; i != new_level; i += inc)
1797 if (!cmos_eval(cmos_cmd) ||
1798 !acpi_ec_write(volume_offset, i + inc))
1799 return -EIO;
1800
1801 if (mute && (!cmos_eval(VOLUME_MUTE) ||
1802 !acpi_ec_write(volume_offset,
1803 new_level + mute)))
1804 return -EIO;
1805 }
1806
1807 if (new_mute != mute) { /* level doesn't change */
1808 cmos_cmd = new_mute ? VOLUME_MUTE : VOLUME_UP;
1809
1810 if (!cmos_eval(cmos_cmd) ||
1811 !acpi_ec_write(volume_offset, level + new_mute))
1812 return -EIO;
1813 }
1814 }
1815
1816 return 0;
1817 }
1818
1819 static enum fan_status_access_mode fan_status_access_mode;
1820 static enum fan_control_access_mode fan_control_access_mode;
1821 static enum fan_control_commands fan_control_commands;
1822
1823 static int fan_control_status_known;
1824 static u8 fan_control_initial_status;
1825
1826 static void fan_watchdog_fire(struct work_struct *ignored);
1827 static int fan_watchdog_maxinterval;
1828 static DECLARE_DELAYED_WORK(fan_watchdog_task, fan_watchdog_fire);
1829
1830 static int fan_init(void)
1831 {
1832 fan_status_access_mode = IBMACPI_FAN_NONE;
1833 fan_control_access_mode = IBMACPI_FAN_WR_NONE;
1834 fan_control_commands = 0;
1835 fan_control_status_known = 1;
1836 fan_watchdog_maxinterval = 0;
1837
1838 if (gfan_handle) {
1839 /* 570, 600e/x, 770e, 770x */
1840 fan_status_access_mode = IBMACPI_FAN_RD_ACPI_GFAN;
1841 } else {
1842 /* all other ThinkPads: note that even old-style
1843 * ThinkPad ECs supports the fan control register */
1844 if (likely(acpi_ec_read(fan_status_offset,
1845 &fan_control_initial_status))) {
1846 fan_status_access_mode = IBMACPI_FAN_RD_TPEC;
1847
1848 /* In some ThinkPads, neither the EC nor the ACPI
1849 * DSDT initialize the fan status, and it ends up
1850 * being set to 0x07 when it *could* be either
1851 * 0x07 or 0x80.
1852 *
1853 * Enable for TP-1Y (T43), TP-78 (R51e),
1854 * TP-76 (R52), TP-70 (T43, R52), which are known
1855 * to be buggy. */
1856 if (fan_control_initial_status == 0x07 &&
1857 ibm_thinkpad_ec_found &&
1858 ((ibm_thinkpad_ec_found[0] == '1' &&
1859 ibm_thinkpad_ec_found[1] == 'Y') ||
1860 (ibm_thinkpad_ec_found[0] == '7' &&
1861 (ibm_thinkpad_ec_found[1] == '6' ||
1862 ibm_thinkpad_ec_found[1] == '8' ||
1863 ibm_thinkpad_ec_found[1] == '0'))
1864 )) {
1865 printk(IBM_NOTICE
1866 "fan_init: initial fan status is "
1867 "unknown, assuming it is in auto "
1868 "mode\n");
1869 fan_control_status_known = 0;
1870 }
1871 } else {
1872 printk(IBM_ERR
1873 "ThinkPad ACPI EC access misbehaving, "
1874 "fan status and control unavailable\n");
1875 return 0;
1876 }
1877 }
1878
1879 if (sfan_handle) {
1880 /* 570, 770x-JL */
1881 fan_control_access_mode = IBMACPI_FAN_WR_ACPI_SFAN;
1882 fan_control_commands |=
1883 IBMACPI_FAN_CMD_LEVEL | IBMACPI_FAN_CMD_ENABLE;
1884 } else {
1885 if (!gfan_handle) {
1886 /* gfan without sfan means no fan control */
1887 /* all other models implement TP EC 0x2f control */
1888
1889 if (fans_handle) {
1890 /* X31, X40, X41 */
1891 fan_control_access_mode =
1892 IBMACPI_FAN_WR_ACPI_FANS;
1893 fan_control_commands |=
1894 IBMACPI_FAN_CMD_SPEED |
1895 IBMACPI_FAN_CMD_LEVEL |
1896 IBMACPI_FAN_CMD_ENABLE;
1897 } else {
1898 fan_control_access_mode = IBMACPI_FAN_WR_TPEC;
1899 fan_control_commands |=
1900 IBMACPI_FAN_CMD_LEVEL |
1901 IBMACPI_FAN_CMD_ENABLE;
1902 }
1903 }
1904 }
1905
1906 return 0;
1907 }
1908
1909 static int fan_get_status(u8 *status)
1910 {
1911 u8 s;
1912
1913 /* TODO:
1914 * Add IBMACPI_FAN_RD_ACPI_FANS ? */
1915
1916 switch (fan_status_access_mode) {
1917 case IBMACPI_FAN_RD_ACPI_GFAN:
1918 /* 570, 600e/x, 770e, 770x */
1919
1920 if (unlikely(!acpi_evalf(gfan_handle, &s, NULL, "d")))
1921 return -EIO;
1922
1923 if (likely(status))
1924 *status = s & 0x07;
1925
1926 break;
1927
1928 case IBMACPI_FAN_RD_TPEC:
1929 /* all except 570, 600e/x, 770e, 770x */
1930 if (unlikely(!acpi_ec_read(fan_status_offset, &s)))
1931 return -EIO;
1932
1933 if (likely(status))
1934 *status = s;
1935
1936 break;
1937
1938 default:
1939 return -ENXIO;
1940 }
1941
1942 return 0;
1943 }
1944
1945 static int fan_get_speed(unsigned int *speed)
1946 {
1947 u8 hi, lo;
1948
1949 switch (fan_status_access_mode) {
1950 case IBMACPI_FAN_RD_TPEC:
1951 /* all except 570, 600e/x, 770e, 770x */
1952 if (unlikely(!acpi_ec_read(fan_rpm_offset, &lo) ||
1953 !acpi_ec_read(fan_rpm_offset + 1, &hi)))
1954 return -EIO;
1955
1956 if (likely(speed))
1957 *speed = (hi << 8) | lo;
1958
1959 break;
1960
1961 default:
1962 return -ENXIO;
1963 }
1964
1965 return 0;
1966 }
1967
1968 static void fan_exit(void)
1969 {
1970 cancel_delayed_work(&fan_watchdog_task);
1971 flush_scheduled_work();
1972 }
1973
1974 static void fan_watchdog_reset(void)
1975 {
1976 static int fan_watchdog_active = 0;
1977
1978 if (fan_watchdog_active)
1979 cancel_delayed_work(&fan_watchdog_task);
1980
1981 if (fan_watchdog_maxinterval > 0) {
1982 fan_watchdog_active = 1;
1983 if (!schedule_delayed_work(&fan_watchdog_task,
1984 msecs_to_jiffies(fan_watchdog_maxinterval
1985 * 1000))) {
1986 printk(IBM_ERR "failed to schedule the fan watchdog, "
1987 "watchdog will not trigger\n");
1988 }
1989 } else
1990 fan_watchdog_active = 0;
1991 }
1992
1993 static int fan_read(char *p)
1994 {
1995 int len = 0;
1996 int rc;
1997 u8 status;
1998 unsigned int speed = 0;
1999
2000 switch (fan_status_access_mode) {
2001 case IBMACPI_FAN_RD_ACPI_GFAN:
2002 /* 570, 600e/x, 770e, 770x */
2003 if ((rc = fan_get_status(&status)) < 0)
2004 return rc;
2005
2006 len += sprintf(p + len, "status:\t\t%s\n"
2007 "level:\t\t%d\n",
2008 (status != 0) ? "enabled" : "disabled", status);
2009 break;
2010
2011 case IBMACPI_FAN_RD_TPEC:
2012 /* all except 570, 600e/x, 770e, 770x */
2013 if ((rc = fan_get_status(&status)) < 0)
2014 return rc;
2015
2016 if (unlikely(!fan_control_status_known)) {
2017 if (status != fan_control_initial_status)
2018 fan_control_status_known = 1;
2019 else
2020 /* Return most likely status. In fact, it
2021 * might be the only possible status */
2022 status = IBMACPI_FAN_EC_AUTO;
2023 }
2024
2025 len += sprintf(p + len, "status:\t\t%s\n",
2026 (status != 0) ? "enabled" : "disabled");
2027
2028 /* No ThinkPad boots on disengaged mode, we can safely
2029 * assume the tachometer is online if fan control status
2030 * was unknown */
2031 if ((rc = fan_get_speed(&speed)) < 0)
2032 return rc;
2033
2034 len += sprintf(p + len, "speed:\t\t%d\n", speed);
2035
2036 if (status & IBMACPI_FAN_EC_DISENGAGED)
2037 /* Disengaged mode takes precedence */
2038 len += sprintf(p + len, "level:\t\tdisengaged\n");
2039 else if (status & IBMACPI_FAN_EC_AUTO)
2040 len += sprintf(p + len, "level:\t\tauto\n");
2041 else
2042 len += sprintf(p + len, "level:\t\t%d\n", status);
2043 break;
2044
2045 case IBMACPI_FAN_NONE:
2046 default:
2047 len += sprintf(p + len, "status:\t\tnot supported\n");
2048 }
2049
2050 if (fan_control_commands & IBMACPI_FAN_CMD_LEVEL) {
2051 len += sprintf(p + len, "commands:\tlevel <level>");
2052
2053 switch (fan_control_access_mode) {
2054 case IBMACPI_FAN_WR_ACPI_SFAN:
2055 len += sprintf(p + len, " (<level> is 0-7)\n");
2056 break;
2057
2058 default:
2059 len += sprintf(p + len, " (<level> is 0-7, "
2060 "auto, disengaged)\n");
2061 break;
2062 }
2063 }
2064
2065 if (fan_control_commands & IBMACPI_FAN_CMD_ENABLE)
2066 len += sprintf(p + len, "commands:\tenable, disable\n"
2067 "commands:\twatchdog <timeout> (<timeout> is 0 (off), "
2068 "1-120 (seconds))\n");
2069
2070 if (fan_control_commands & IBMACPI_FAN_CMD_SPEED)
2071 len += sprintf(p + len, "commands:\tspeed <speed>"
2072 " (<speed> is 0-65535)\n");
2073
2074 return len;
2075 }
2076
2077 static int fan_set_level(int level)
2078 {
2079 switch (fan_control_access_mode) {
2080 case IBMACPI_FAN_WR_ACPI_SFAN:
2081 if (level >= 0 && level <= 7) {
2082 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", level))
2083 return -EIO;
2084 } else
2085 return -EINVAL;
2086 break;
2087
2088 case IBMACPI_FAN_WR_ACPI_FANS:
2089 case IBMACPI_FAN_WR_TPEC:
2090 if ((level != IBMACPI_FAN_EC_AUTO) &&
2091 (level != IBMACPI_FAN_EC_DISENGAGED) &&
2092 ((level < 0) || (level > 7)))
2093 return -EINVAL;
2094
2095 if (!acpi_ec_write(fan_status_offset, level))
2096 return -EIO;
2097 else
2098 fan_control_status_known = 1;
2099 break;
2100
2101 default:
2102 return -ENXIO;
2103 }
2104 return 0;
2105 }
2106
2107 static int fan_set_enable(void)
2108 {
2109 u8 s;
2110 int rc;
2111
2112 switch (fan_control_access_mode) {
2113 case IBMACPI_FAN_WR_ACPI_FANS:
2114 case IBMACPI_FAN_WR_TPEC:
2115 if ((rc = fan_get_status(&s)) < 0)
2116 return rc;
2117
2118 /* Don't go out of emergency fan mode */
2119 if (s != 7)
2120 s = IBMACPI_FAN_EC_AUTO;
2121
2122 if (!acpi_ec_write(fan_status_offset, s))
2123 return -EIO;
2124 else
2125 fan_control_status_known = 1;
2126 break;
2127
2128 case IBMACPI_FAN_WR_ACPI_SFAN:
2129 if ((rc = fan_get_status(&s)) < 0)
2130 return rc;
2131
2132 s &= 0x07;
2133
2134 /* Set fan to at least level 4 */
2135 if (s < 4)
2136 s = 4;
2137
2138 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", s))
2139 return -EIO;
2140 break;
2141
2142 default:
2143 return -ENXIO;
2144 }
2145 return 0;
2146 }
2147
2148 static int fan_set_disable(void)
2149 {
2150 switch (fan_control_access_mode) {
2151 case IBMACPI_FAN_WR_ACPI_FANS:
2152 case IBMACPI_FAN_WR_TPEC:
2153 if (!acpi_ec_write(fan_status_offset, 0x00))
2154 return -EIO;
2155 else
2156 fan_control_status_known = 1;
2157 break;
2158
2159 case IBMACPI_FAN_WR_ACPI_SFAN:
2160 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", 0x00))
2161 return -EIO;
2162 break;
2163
2164 default:
2165 return -ENXIO;
2166 }
2167 return 0;
2168 }
2169
2170 static int fan_set_speed(int speed)
2171 {
2172 switch (fan_control_access_mode) {
2173 case IBMACPI_FAN_WR_ACPI_FANS:
2174 if (speed >= 0 && speed <= 65535) {
2175 if (!acpi_evalf(fans_handle, NULL, NULL, "vddd",
2176 speed, speed, speed))
2177 return -EIO;
2178 } else
2179 return -EINVAL;
2180 break;
2181
2182 default:
2183 return -ENXIO;
2184 }
2185 return 0;
2186 }
2187
2188 static int fan_write_cmd_level(const char *cmd, int *rc)
2189 {
2190 int level;
2191
2192 if (strlencmp(cmd, "level auto") == 0)
2193 level = IBMACPI_FAN_EC_AUTO;
2194 else if (strlencmp(cmd, "level disengaged") == 0)
2195 level = IBMACPI_FAN_EC_DISENGAGED;
2196 else if (sscanf(cmd, "level %d", &level) != 1)
2197 return 0;
2198
2199 if ((*rc = fan_set_level(level)) == -ENXIO)
2200 printk(IBM_ERR "level command accepted for unsupported "
2201 "access mode %d", fan_control_access_mode);
2202
2203 return 1;
2204 }
2205
2206 static int fan_write_cmd_enable(const char *cmd, int *rc)
2207 {
2208 if (strlencmp(cmd, "enable") != 0)
2209 return 0;
2210
2211 if ((*rc = fan_set_enable()) == -ENXIO)
2212 printk(IBM_ERR "enable command accepted for unsupported "
2213 "access mode %d", fan_control_access_mode);
2214
2215 return 1;
2216 }
2217
2218 static int fan_write_cmd_disable(const char *cmd, int *rc)
2219 {
2220 if (strlencmp(cmd, "disable") != 0)
2221 return 0;
2222
2223 if ((*rc = fan_set_disable()) == -ENXIO)
2224 printk(IBM_ERR "disable command accepted for unsupported "
2225 "access mode %d", fan_control_access_mode);
2226
2227 return 1;
2228 }
2229
2230 static int fan_write_cmd_speed(const char *cmd, int *rc)
2231 {
2232 int speed;
2233
2234 /* TODO:
2235 * Support speed <low> <medium> <high> ? */
2236
2237 if (sscanf(cmd, "speed %d", &speed) != 1)
2238 return 0;
2239
2240 if ((*rc = fan_set_speed(speed)) == -ENXIO)
2241 printk(IBM_ERR "speed command accepted for unsupported "
2242 "access mode %d", fan_control_access_mode);
2243
2244 return 1;
2245 }
2246
2247 static int fan_write_cmd_watchdog(const char *cmd, int *rc)
2248 {
2249 int interval;
2250
2251 if (sscanf(cmd, "watchdog %d", &interval) != 1)
2252 return 0;
2253
2254 if (interval < 0 || interval > 120)
2255 *rc = -EINVAL;
2256 else
2257 fan_watchdog_maxinterval = interval;
2258
2259 return 1;
2260 }
2261
2262 static int fan_write(char *buf)
2263 {
2264 char *cmd;
2265 int rc = 0;
2266
2267 while (!rc && (cmd = next_cmd(&buf))) {
2268 if (!((fan_control_commands & IBMACPI_FAN_CMD_LEVEL) &&
2269 fan_write_cmd_level(cmd, &rc)) &&
2270 !((fan_control_commands & IBMACPI_FAN_CMD_ENABLE) &&
2271 (fan_write_cmd_enable(cmd, &rc) ||
2272 fan_write_cmd_disable(cmd, &rc) ||
2273 fan_write_cmd_watchdog(cmd, &rc))) &&
2274 !((fan_control_commands & IBMACPI_FAN_CMD_SPEED) &&
2275 fan_write_cmd_speed(cmd, &rc))
2276 )
2277 rc = -EINVAL;
2278 else if (!rc)
2279 fan_watchdog_reset();
2280 }
2281
2282 return rc;
2283 }
2284
2285 static void fan_watchdog_fire(struct work_struct *ignored)
2286 {
2287 printk(IBM_NOTICE "fan watchdog: enabling fan\n");
2288 if (fan_set_enable()) {
2289 printk(IBM_ERR "fan watchdog: error while enabling fan\n");
2290 /* reschedule for later */
2291 fan_watchdog_reset();
2292 }
2293 }
2294
2295 static struct ibm_struct ibms[] = {
2296 {
2297 .name = "driver",
2298 .init = ibm_acpi_driver_init,
2299 .read = driver_read,
2300 },
2301 {
2302 .name = "hotkey",
2303 .hid = IBM_HKEY_HID,
2304 .init = hotkey_init,
2305 .read = hotkey_read,
2306 .write = hotkey_write,
2307 .exit = hotkey_exit,
2308 .notify = hotkey_notify,
2309 .handle = &hkey_handle,
2310 .type = ACPI_DEVICE_NOTIFY,
2311 },
2312 {
2313 .name = "bluetooth",
2314 .init = bluetooth_init,
2315 .read = bluetooth_read,
2316 .write = bluetooth_write,
2317 },
2318 {
2319 .name = "wan",
2320 .init = wan_init,
2321 .read = wan_read,
2322 .write = wan_write,
2323 .experimental = 1,
2324 },
2325 {
2326 .name = "video",
2327 .init = video_init,
2328 .read = video_read,
2329 .write = video_write,
2330 .exit = video_exit,
2331 },
2332 {
2333 .name = "light",
2334 .init = light_init,
2335 .read = light_read,
2336 .write = light_write,
2337 },
2338 #ifdef CONFIG_ACPI_IBM_DOCK
2339 {
2340 .name = "dock",
2341 .read = dock_read,
2342 .write = dock_write,
2343 .notify = dock_notify,
2344 .handle = &dock_handle,
2345 .type = ACPI_SYSTEM_NOTIFY,
2346 },
2347 {
2348 .name = "dock",
2349 .hid = IBM_PCI_HID,
2350 .notify = dock_notify,
2351 .handle = &pci_handle,
2352 .type = ACPI_SYSTEM_NOTIFY,
2353 },
2354 #endif
2355 {
2356 .name = "bay",
2357 .init = bay_init,
2358 .read = bay_read,
2359 .write = bay_write,
2360 .notify = bay_notify,
2361 .handle = &bay_handle,
2362 .type = ACPI_SYSTEM_NOTIFY,
2363 },
2364 {
2365 .name = "cmos",
2366 .read = cmos_read,
2367 .write = cmos_write,
2368 },
2369 {
2370 .name = "led",
2371 .init = led_init,
2372 .read = led_read,
2373 .write = led_write,
2374 },
2375 {
2376 .name = "beep",
2377 .read = beep_read,
2378 .write = beep_write,
2379 },
2380 {
2381 .name = "thermal",
2382 .init = thermal_init,
2383 .read = thermal_read,
2384 },
2385 {
2386 .name = "ecdump",
2387 .read = ecdump_read,
2388 .write = ecdump_write,
2389 .experimental = 1,
2390 },
2391 {
2392 .name = "brightness",
2393 .read = brightness_read,
2394 .write = brightness_write,
2395 .init = brightness_init,
2396 .exit = brightness_exit,
2397 },
2398 {
2399 .name = "volume",
2400 .read = volume_read,
2401 .write = volume_write,
2402 },
2403 {
2404 .name = "fan",
2405 .read = fan_read,
2406 .write = fan_write,
2407 .init = fan_init,
2408 .exit = fan_exit,
2409 .experimental = 1,
2410 },
2411 };
2412
2413 static int dispatch_read(char *page, char **start, off_t off, int count,
2414 int *eof, void *data)
2415 {
2416 struct ibm_struct *ibm = data;
2417 int len;
2418
2419 if (!ibm || !ibm->read)
2420 return -EINVAL;
2421
2422 len = ibm->read(page);
2423 if (len < 0)
2424 return len;
2425
2426 if (len <= off + count)
2427 *eof = 1;
2428 *start = page + off;
2429 len -= off;
2430 if (len > count)
2431 len = count;
2432 if (len < 0)
2433 len = 0;
2434
2435 return len;
2436 }
2437
2438 static int dispatch_write(struct file *file, const char __user * userbuf,
2439 unsigned long count, void *data)
2440 {
2441 struct ibm_struct *ibm = data;
2442 char *kernbuf;
2443 int ret;
2444
2445 if (!ibm || !ibm->write)
2446 return -EINVAL;
2447
2448 kernbuf = kmalloc(count + 2, GFP_KERNEL);
2449 if (!kernbuf)
2450 return -ENOMEM;
2451
2452 if (copy_from_user(kernbuf, userbuf, count)) {
2453 kfree(kernbuf);
2454 return -EFAULT;
2455 }
2456
2457 kernbuf[count] = 0;
2458 strcat(kernbuf, ",");
2459 ret = ibm->write(kernbuf);
2460 if (ret == 0)
2461 ret = count;
2462
2463 kfree(kernbuf);
2464
2465 return ret;
2466 }
2467
2468 static void dispatch_notify(acpi_handle handle, u32 event, void *data)
2469 {
2470 struct ibm_struct *ibm = data;
2471
2472 if (!ibm || !ibm->notify)
2473 return;
2474
2475 ibm->notify(ibm, event);
2476 }
2477
2478 static int __init setup_notify(struct ibm_struct *ibm)
2479 {
2480 acpi_status status;
2481 int ret;
2482
2483 if (!*ibm->handle)
2484 return 0;
2485
2486 ret = acpi_bus_get_device(*ibm->handle, &ibm->device);
2487 if (ret < 0) {
2488 printk(IBM_ERR "%s device not present\n", ibm->name);
2489 return 0;
2490 }
2491
2492 acpi_driver_data(ibm->device) = ibm;
2493 sprintf(acpi_device_class(ibm->device), "%s/%s", IBM_NAME, ibm->name);
2494
2495 status = acpi_install_notify_handler(*ibm->handle, ibm->type,
2496 dispatch_notify, ibm);
2497 if (ACPI_FAILURE(status)) {
2498 printk(IBM_ERR "acpi_install_notify_handler(%s) failed: %d\n",
2499 ibm->name, status);
2500 return -ENODEV;
2501 }
2502 ibm->notify_installed = 1;
2503 return 0;
2504 }
2505
2506 static int __init ibm_device_add(struct acpi_device *device)
2507 {
2508 return 0;
2509 }
2510
2511 static int __init register_driver(struct ibm_struct *ibm)
2512 {
2513 int ret;
2514
2515 ibm->driver = kzalloc(sizeof(struct acpi_driver), GFP_KERNEL);
2516 if (!ibm->driver) {
2517 printk(IBM_ERR "kmalloc(ibm->driver) failed\n");
2518 return -1;
2519 }
2520
2521 sprintf(ibm->driver->name, "%s_%s", IBM_NAME, ibm->name);
2522 ibm->driver->ids = ibm->hid;
2523 ibm->driver->ops.add = &ibm_device_add;
2524
2525 ret = acpi_bus_register_driver(ibm->driver);
2526 if (ret < 0) {
2527 printk(IBM_ERR "acpi_bus_register_driver(%s) failed: %d\n",
2528 ibm->hid, ret);
2529 kfree(ibm->driver);
2530 }
2531
2532 return ret;
2533 }
2534
2535 static int __init ibm_init(struct ibm_struct *ibm)
2536 {
2537 int ret;
2538 struct proc_dir_entry *entry;
2539
2540 if (ibm->experimental && !experimental)
2541 return 0;
2542
2543 if (ibm->hid) {
2544 ret = register_driver(ibm);
2545 if (ret < 0)
2546 return ret;
2547 ibm->driver_registered = 1;
2548 }
2549
2550 if (ibm->init) {
2551 ret = ibm->init();
2552 if (ret != 0)
2553 return ret;
2554 ibm->init_called = 1;
2555 }
2556
2557 if (ibm->read) {
2558 entry = create_proc_entry(ibm->name,
2559 S_IFREG | S_IRUGO | S_IWUSR,
2560 proc_dir);
2561 if (!entry) {
2562 printk(IBM_ERR "unable to create proc entry %s\n",
2563 ibm->name);
2564 return -ENODEV;
2565 }
2566 entry->owner = THIS_MODULE;
2567 entry->data = ibm;
2568 entry->read_proc = &dispatch_read;
2569 if (ibm->write)
2570 entry->write_proc = &dispatch_write;
2571 ibm->proc_created = 1;
2572 }
2573
2574 if (ibm->notify) {
2575 ret = setup_notify(ibm);
2576 if (ret < 0)
2577 return ret;
2578 }
2579
2580 return 0;
2581 }
2582
2583 static void ibm_exit(struct ibm_struct *ibm)
2584 {
2585 if (ibm->notify_installed)
2586 acpi_remove_notify_handler(*ibm->handle, ibm->type,
2587 dispatch_notify);
2588
2589 if (ibm->proc_created)
2590 remove_proc_entry(ibm->name, proc_dir);
2591
2592 if (ibm->init_called && ibm->exit)
2593 ibm->exit();
2594
2595 if (ibm->driver_registered) {
2596 acpi_bus_unregister_driver(ibm->driver);
2597 kfree(ibm->driver);
2598 }
2599 }
2600
2601 static void __init ibm_handle_init(char *name,
2602 acpi_handle * handle, acpi_handle parent,
2603 char **paths, int num_paths, char **path)
2604 {
2605 int i;
2606 acpi_status status;
2607
2608 for (i = 0; i < num_paths; i++) {
2609 status = acpi_get_handle(parent, paths[i], handle);
2610 if (ACPI_SUCCESS(status)) {
2611 *path = paths[i];
2612 return;
2613 }
2614 }
2615
2616 *handle = NULL;
2617 }
2618
2619 #define IBM_HANDLE_INIT(object) \
2620 ibm_handle_init(#object, &object##_handle, *object##_parent, \
2621 object##_paths, ARRAY_SIZE(object##_paths), &object##_path)
2622
2623 static int __init set_ibm_param(const char *val, struct kernel_param *kp)
2624 {
2625 unsigned int i;
2626
2627 for (i = 0; i < ARRAY_SIZE(ibms); i++)
2628 if (strcmp(ibms[i].name, kp->name) == 0 && ibms[i].write) {
2629 if (strlen(val) > sizeof(ibms[i].param) - 2)
2630 return -ENOSPC;
2631 strcpy(ibms[i].param, val);
2632 strcat(ibms[i].param, ",");
2633 return 0;
2634 }
2635
2636 return -EINVAL;
2637 }
2638
2639 #define IBM_PARAM(feature) \
2640 module_param_call(feature, set_ibm_param, NULL, NULL, 0)
2641
2642 IBM_PARAM(hotkey);
2643 IBM_PARAM(bluetooth);
2644 IBM_PARAM(video);
2645 IBM_PARAM(light);
2646 #ifdef CONFIG_ACPI_IBM_DOCK
2647 IBM_PARAM(dock);
2648 #endif
2649 IBM_PARAM(bay);
2650 IBM_PARAM(cmos);
2651 IBM_PARAM(led);
2652 IBM_PARAM(beep);
2653 IBM_PARAM(ecdump);
2654 IBM_PARAM(brightness);
2655 IBM_PARAM(volume);
2656 IBM_PARAM(fan);
2657
2658 static void acpi_ibm_exit(void)
2659 {
2660 int i;
2661
2662 for (i = ARRAY_SIZE(ibms) - 1; i >= 0; i--)
2663 ibm_exit(&ibms[i]);
2664
2665 if (proc_dir)
2666 remove_proc_entry(IBM_DIR, acpi_root_dir);
2667
2668 if (ibm_thinkpad_ec_found)
2669 kfree(ibm_thinkpad_ec_found);
2670 }
2671
2672 static char* __init check_dmi_for_ec(void)
2673 {
2674 struct dmi_device *dev = NULL;
2675 char ec_fw_string[18];
2676
2677 /*
2678 * ThinkPad T23 or newer, A31 or newer, R50e or newer,
2679 * X32 or newer, all Z series; Some models must have an
2680 * up-to-date BIOS or they will not be detected.
2681 *
2682 * See http://thinkwiki.org/wiki/List_of_DMI_IDs
2683 */
2684 while ((dev = dmi_find_device(DMI_DEV_TYPE_OEM_STRING, NULL, dev))) {
2685 if (sscanf(dev->name,
2686 "IBM ThinkPad Embedded Controller -[%17c",
2687 ec_fw_string) == 1) {
2688 ec_fw_string[sizeof(ec_fw_string) - 1] = 0;
2689 ec_fw_string[strcspn(ec_fw_string, " ]")] = 0;
2690 return kstrdup(ec_fw_string, GFP_KERNEL);
2691 }
2692 }
2693 return NULL;
2694 }
2695
2696 static int __init acpi_ibm_init(void)
2697 {
2698 int ret, i;
2699
2700 if (acpi_disabled)
2701 return -ENODEV;
2702
2703 /* ec is required because many other handles are relative to it */
2704 IBM_HANDLE_INIT(ec);
2705 if (!ec_handle) {
2706 printk(IBM_ERR "ec object not found\n");
2707 return -ENODEV;
2708 }
2709
2710 /* Models with newer firmware report the EC in DMI */
2711 ibm_thinkpad_ec_found = check_dmi_for_ec();
2712
2713 /* these handles are not required */
2714 IBM_HANDLE_INIT(vid);
2715 IBM_HANDLE_INIT(vid2);
2716 IBM_HANDLE_INIT(ledb);
2717 IBM_HANDLE_INIT(led);
2718 IBM_HANDLE_INIT(hkey);
2719 IBM_HANDLE_INIT(lght);
2720 IBM_HANDLE_INIT(cmos);
2721 #ifdef CONFIG_ACPI_IBM_DOCK
2722 IBM_HANDLE_INIT(dock);
2723 #endif
2724 IBM_HANDLE_INIT(pci);
2725 IBM_HANDLE_INIT(bay);
2726 if (bay_handle)
2727 IBM_HANDLE_INIT(bay_ej);
2728 IBM_HANDLE_INIT(bay2);
2729 if (bay2_handle)
2730 IBM_HANDLE_INIT(bay2_ej);
2731 IBM_HANDLE_INIT(beep);
2732 IBM_HANDLE_INIT(ecrd);
2733 IBM_HANDLE_INIT(ecwr);
2734 IBM_HANDLE_INIT(fans);
2735 IBM_HANDLE_INIT(gfan);
2736 IBM_HANDLE_INIT(sfan);
2737
2738 proc_dir = proc_mkdir(IBM_DIR, acpi_root_dir);
2739 if (!proc_dir) {
2740 printk(IBM_ERR "unable to create proc dir %s", IBM_DIR);
2741 acpi_ibm_exit();
2742 return -ENODEV;
2743 }
2744 proc_dir->owner = THIS_MODULE;
2745
2746 for (i = 0; i < ARRAY_SIZE(ibms); i++) {
2747 ret = ibm_init(&ibms[i]);
2748 if (ret >= 0 && *ibms[i].param)
2749 ret = ibms[i].write(ibms[i].param);
2750 if (ret < 0) {
2751 acpi_ibm_exit();
2752 return ret;
2753 }
2754 }
2755
2756 return 0;
2757 }
2758
2759 module_init(acpi_ibm_init);
2760 module_exit(acpi_ibm_exit);
kernel-based virtual machine