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ACPI: ibm-acpi: make ibm-acpi bay support optional
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / acpi / ibm_acpi.c
blobe18d4b47abfe45a5e1734c68480daaca3379a772
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 #ifdef CONFIG_ACPI_IBM_BAY
161 IBM_HANDLE(bay, root, "\\_SB.PCI.IDE.SECN.MAST", /* 570 */
162 "\\_SB.PCI0.IDE0.IDES.IDSM", /* 600e/x, 770e, 770x */
163 "\\_SB.PCI0.SATA.SCND.MSTR", /* T60, X60, Z60 */
164 "\\_SB.PCI0.IDE0.SCND.MSTR", /* all others */
165 ); /* A21e, R30, R31 */
166
167 IBM_HANDLE(bay_ej, bay, "_EJ3", /* 600e/x, A2xm/p, A3x */
168 "_EJ0", /* all others */
169 ); /* 570,A21e,G4x,R30,R31,R32,R40e,R50e */
170
171 IBM_HANDLE(bay2, root, "\\_SB.PCI0.IDE0.PRIM.SLAV", /* A3x, R32 */
172 "\\_SB.PCI0.IDE0.IDEP.IDPS", /* 600e/x, 770e, 770x */
173 ); /* all others */
174
175 IBM_HANDLE(bay2_ej, bay2, "_EJ3", /* 600e/x, 770e, A3x */
176 "_EJ0", /* 770x */
177 ); /* all others */
178 #endif /* CONFIG_ACPI_IBM_BAY */
179
180 /* don't list other alternatives as we install a notify handler on the 570 */
181 IBM_HANDLE(pci, root, "\\_SB.PCI"); /* 570 */
182
183 IBM_HANDLE(hkey, ec, "\\_SB.HKEY", /* 600e/x, 770e, 770x */
184 "^HKEY", /* R30, R31 */
185 "HKEY", /* all others */
186 ); /* 570 */
187
188 IBM_HANDLE(lght, root, "\\LGHT"); /* A21e, A2xm/p, T20-22, X20-21 */
189 IBM_HANDLE(ledb, ec, "LEDB"); /* G4x */
190
191 IBM_HANDLE(led, ec, "SLED", /* 570 */
192 "SYSL", /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
193 "LED", /* all others */
194 ); /* R30, R31 */
195
196 IBM_HANDLE(beep, ec, "BEEP"); /* all except R30, R31 */
197 IBM_HANDLE(ecrd, ec, "ECRD"); /* 570 */
198 IBM_HANDLE(ecwr, ec, "ECWR"); /* 570 */
199 IBM_HANDLE(fans, ec, "FANS"); /* X31, X40, X41 */
200
201 IBM_HANDLE(gfan, ec, "GFAN", /* 570 */
202 "\\FSPD", /* 600e/x, 770e, 770x */
203 ); /* all others */
204
205 IBM_HANDLE(sfan, ec, "SFAN", /* 570 */
206 "JFNS", /* 770x-JL */
207 ); /* all others */
208
209 #define IBM_HKEY_HID "IBM0068"
210 #define IBM_PCI_HID "PNP0A03"
211
212 enum thermal_access_mode {
213 IBMACPI_THERMAL_NONE = 0, /* No thermal support */
214 IBMACPI_THERMAL_ACPI_TMP07, /* Use ACPI TMP0-7 */
215 IBMACPI_THERMAL_ACPI_UPDT, /* Use ACPI TMP0-7 with UPDT */
216 IBMACPI_THERMAL_TPEC_8, /* Use ACPI EC regs, 8 sensors */
217 IBMACPI_THERMAL_TPEC_16, /* Use ACPI EC regs, 16 sensors */
218 };
219
220 #define IBMACPI_MAX_THERMAL_SENSORS 16 /* Max thermal sensors supported */
221 struct ibm_thermal_sensors_struct {
222 s32 temp[IBMACPI_MAX_THERMAL_SENSORS];
223 };
224
225 /*
226 * FAN ACCESS MODES
227 *
228 * IBMACPI_FAN_RD_ACPI_GFAN:
229 * ACPI GFAN method: returns fan level
230 *
231 * see IBMACPI_FAN_WR_ACPI_SFAN
232 * EC 0x2f not available if GFAN exists
233 *
234 * IBMACPI_FAN_WR_ACPI_SFAN:
235 * ACPI SFAN method: sets fan level, 0 (stop) to 7 (max)
236 *
237 * EC 0x2f might be available *for reading*, but never for writing.
238 *
239 * IBMACPI_FAN_WR_TPEC:
240 * ThinkPad EC register 0x2f (HFSP): fan control loop mode Supported
241 * on almost all ThinkPads
242 *
243 * Fan speed changes of any sort (including those caused by the
244 * disengaged mode) are usually done slowly by the firmware as the
245 * maximum ammount of fan duty cycle change per second seems to be
246 * limited.
247 *
248 * Reading is not available if GFAN exists.
249 * Writing is not available if SFAN exists.
250 *
251 * Bits
252 * 7 automatic mode engaged;
253 * (default operation mode of the ThinkPad)
254 * fan level is ignored in this mode.
255 * 6 disengage mode (takes precedence over bit 7);
256 * not available on all thinkpads. May disable
257 * the tachometer, and speeds up fan to 100% duty-cycle,
258 * which speeds it up far above the standard RPM
259 * levels. It is not impossible that it could cause
260 * hardware damage.
261 * 5-3 unused in some models. Extra bits for fan level
262 * in others, but still useless as all values above
263 * 7 map to the same speed as level 7 in these models.
264 * 2-0 fan level (0..7 usually)
265 * 0x00 = stop
266 * 0x07 = max (set when temperatures critical)
267 * Some ThinkPads may have other levels, see
268 * IBMACPI_FAN_WR_ACPI_FANS (X31/X40/X41)
269 *
270 * FIRMWARE BUG: on some models, EC 0x2f might not be initialized at
271 * boot. Apparently the EC does not intialize it, so unless ACPI DSDT
272 * does so, its initial value is meaningless (0x07).
273 *
274 * For firmware bugs, refer to:
275 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
276 *
277 * ----
278 *
279 * ThinkPad EC register 0x84 (LSB), 0x85 (MSB):
280 * Main fan tachometer reading (in RPM)
281 *
282 * This register is present on all ThinkPads with a new-style EC, and
283 * it is known not to be present on the A21m/e, and T22, as there is
284 * something else in offset 0x84 according to the ACPI DSDT. Other
285 * ThinkPads from this same time period (and earlier) probably lack the
286 * tachometer as well.
287 *
288 * Unfortunately a lot of ThinkPads with new-style ECs but whose firwmare
289 * was never fixed by IBM to report the EC firmware version string
290 * probably support the tachometer (like the early X models), so
291 * detecting it is quite hard. We need more data to know for sure.
292 *
293 * FIRMWARE BUG: always read 0x84 first, otherwise incorrect readings
294 * might result.
295 *
296 * FIRMWARE BUG: when EC 0x2f bit 6 is set (disengaged mode), this
297 * register is not invalidated in ThinkPads that disable tachometer
298 * readings. Thus, the tachometer readings go stale.
299 *
300 * For firmware bugs, refer to:
301 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
302 *
303 * IBMACPI_FAN_WR_ACPI_FANS:
304 * ThinkPad X31, X40, X41. Not available in the X60.
305 *
306 * FANS ACPI handle: takes three arguments: low speed, medium speed,
307 * high speed. ACPI DSDT seems to map these three speeds to levels
308 * as follows: STOP LOW LOW MED MED HIGH HIGH HIGH HIGH
309 * (this map is stored on FAN0..FAN8 as "0,1,1,2,2,3,3,3,3")
310 *
311 * The speeds are stored on handles
312 * (FANA:FAN9), (FANC:FANB), (FANE:FAND).
313 *
314 * There are three default speed sets, acessible as handles:
315 * FS1L,FS1M,FS1H; FS2L,FS2M,FS2H; FS3L,FS3M,FS3H
316 *
317 * ACPI DSDT switches which set is in use depending on various
318 * factors.
319 *
320 * IBMACPI_FAN_WR_TPEC is also available and should be used to
321 * command the fan. The X31/X40/X41 seems to have 8 fan levels,
322 * but the ACPI tables just mention level 7.
323 */
324
325 enum fan_status_access_mode {
326 IBMACPI_FAN_NONE = 0, /* No fan status or control */
327 IBMACPI_FAN_RD_ACPI_GFAN, /* Use ACPI GFAN */
328 IBMACPI_FAN_RD_TPEC, /* Use ACPI EC regs 0x2f, 0x84-0x85 */
329 };
330
331 enum fan_control_access_mode {
332 IBMACPI_FAN_WR_NONE = 0, /* No fan control */
333 IBMACPI_FAN_WR_ACPI_SFAN, /* Use ACPI SFAN */
334 IBMACPI_FAN_WR_TPEC, /* Use ACPI EC reg 0x2f */
335 IBMACPI_FAN_WR_ACPI_FANS, /* Use ACPI FANS and EC reg 0x2f */
336 };
337
338 enum fan_control_commands {
339 IBMACPI_FAN_CMD_SPEED = 0x0001, /* speed command */
340 IBMACPI_FAN_CMD_LEVEL = 0x0002, /* level command */
341 IBMACPI_FAN_CMD_ENABLE = 0x0004, /* enable/disable cmd,
342 * and also watchdog cmd */
343 };
344
345 enum { /* Fan control constants */
346 fan_status_offset = 0x2f, /* EC register 0x2f */
347 fan_rpm_offset = 0x84, /* EC register 0x84: LSB, 0x85 MSB (RPM)
348 * 0x84 must be read before 0x85 */
349
350 IBMACPI_FAN_EC_DISENGAGED = 0x40, /* EC mode: tachometer
351 * disengaged */
352 IBMACPI_FAN_EC_AUTO = 0x80, /* EC mode: auto fan
353 * control */
354 };
355
356 static char *ibm_thinkpad_ec_found = NULL;
357
358 struct ibm_struct {
359 char *name;
360 char param[32];
361
362 char *hid;
363 struct acpi_driver *driver;
364
365 int (*init) (void);
366 int (*read) (char *);
367 int (*write) (char *);
368 void (*exit) (void);
369
370 void (*notify) (struct ibm_struct *, u32);
371 acpi_handle *handle;
372 int type;
373 struct acpi_device *device;
374
375 int driver_registered;
376 int proc_created;
377 int init_called;
378 int notify_installed;
379
380 int experimental;
381 };
382
383 static struct proc_dir_entry *proc_dir = NULL;
384
385 static struct backlight_device *ibm_backlight_device = NULL;
386
387 #define onoff(status,bit) ((status) & (1 << (bit)) ? "on" : "off")
388 #define enabled(status,bit) ((status) & (1 << (bit)) ? "enabled" : "disabled")
389 #define strlencmp(a,b) (strncmp((a), (b), strlen(b)))
390
391 static int acpi_evalf(acpi_handle handle,
392 void *res, char *method, char *fmt, ...)
393 {
394 char *fmt0 = fmt;
395 struct acpi_object_list params;
396 union acpi_object in_objs[IBM_MAX_ACPI_ARGS];
397 struct acpi_buffer result, *resultp;
398 union acpi_object out_obj;
399 acpi_status status;
400 va_list ap;
401 char res_type;
402 int success;
403 int quiet;
404
405 if (!*fmt) {
406 printk(IBM_ERR "acpi_evalf() called with empty format\n");
407 return 0;
408 }
409
410 if (*fmt == 'q') {
411 quiet = 1;
412 fmt++;
413 } else
414 quiet = 0;
415
416 res_type = *(fmt++);
417
418 params.count = 0;
419 params.pointer = &in_objs[0];
420
421 va_start(ap, fmt);
422 while (*fmt) {
423 char c = *(fmt++);
424 switch (c) {
425 case 'd': /* int */
426 in_objs[params.count].integer.value = va_arg(ap, int);
427 in_objs[params.count++].type = ACPI_TYPE_INTEGER;
428 break;
429 /* add more types as needed */
430 default:
431 printk(IBM_ERR "acpi_evalf() called "
432 "with invalid format character '%c'\n", c);
433 return 0;
434 }
435 }
436 va_end(ap);
437
438 if (res_type != 'v') {
439 result.length = sizeof(out_obj);
440 result.pointer = &out_obj;
441 resultp = &result;
442 } else
443 resultp = NULL;
444
445 status = acpi_evaluate_object(handle, method, &params, resultp);
446
447 switch (res_type) {
448 case 'd': /* int */
449 if (res)
450 *(int *)res = out_obj.integer.value;
451 success = status == AE_OK && out_obj.type == ACPI_TYPE_INTEGER;
452 break;
453 case 'v': /* void */
454 success = status == AE_OK;
455 break;
456 /* add more types as needed */
457 default:
458 printk(IBM_ERR "acpi_evalf() called "
459 "with invalid format character '%c'\n", res_type);
460 return 0;
461 }
462
463 if (!success && !quiet)
464 printk(IBM_ERR "acpi_evalf(%s, %s, ...) failed: %d\n",
465 method, fmt0, status);
466
467 return success;
468 }
469
470 static void __unused acpi_print_int(acpi_handle handle, char *method)
471 {
472 int i;
473
474 if (acpi_evalf(handle, &i, method, "d"))
475 printk(IBM_INFO "%s = 0x%x\n", method, i);
476 else
477 printk(IBM_ERR "error calling %s\n", method);
478 }
479
480 static char *next_cmd(char **cmds)
481 {
482 char *start = *cmds;
483 char *end;
484
485 while ((end = strchr(start, ',')) && end == start)
486 start = end + 1;
487
488 if (!end)
489 return NULL;
490
491 *end = 0;
492 *cmds = end + 1;
493 return start;
494 }
495
496 static int ibm_acpi_driver_init(void)
497 {
498 printk(IBM_INFO "%s v%s\n", IBM_DESC, IBM_VERSION);
499 printk(IBM_INFO "%s\n", IBM_URL);
500
501 if (ibm_thinkpad_ec_found)
502 printk(IBM_INFO "ThinkPad EC firmware %s\n",
503 ibm_thinkpad_ec_found);
504
505 return 0;
506 }
507
508 static int driver_read(char *p)
509 {
510 int len = 0;
511
512 len += sprintf(p + len, "driver:\t\t%s\n", IBM_DESC);
513 len += sprintf(p + len, "version:\t%s\n", IBM_VERSION);
514
515 return len;
516 }
517
518 static int hotkey_supported;
519 static int hotkey_mask_supported;
520 static int hotkey_orig_status;
521 static int hotkey_orig_mask;
522
523 static int hotkey_get(int *status, int *mask)
524 {
525 if (!acpi_evalf(hkey_handle, status, "DHKC", "d"))
526 return 0;
527
528 if (hotkey_mask_supported)
529 if (!acpi_evalf(hkey_handle, mask, "DHKN", "d"))
530 return 0;
531
532 return 1;
533 }
534
535 static int hotkey_set(int status, int mask)
536 {
537 int i;
538
539 if (!acpi_evalf(hkey_handle, NULL, "MHKC", "vd", status))
540 return 0;
541
542 if (hotkey_mask_supported)
543 for (i = 0; i < 32; i++) {
544 int bit = ((1 << i) & mask) != 0;
545 if (!acpi_evalf(hkey_handle,
546 NULL, "MHKM", "vdd", i + 1, bit))
547 return 0;
548 }
549
550 return 1;
551 }
552
553 static int hotkey_init(void)
554 {
555 /* hotkey not supported on 570 */
556 hotkey_supported = hkey_handle != NULL;
557
558 if (hotkey_supported) {
559 /* mask not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
560 A30, R30, R31, T20-22, X20-21, X22-24 */
561 hotkey_mask_supported =
562 acpi_evalf(hkey_handle, NULL, "DHKN", "qv");
563
564 if (!hotkey_get(&hotkey_orig_status, &hotkey_orig_mask))
565 return -ENODEV;
566 }
567
568 return 0;
569 }
570
571 static int hotkey_read(char *p)
572 {
573 int status, mask;
574 int len = 0;
575
576 if (!hotkey_supported) {
577 len += sprintf(p + len, "status:\t\tnot supported\n");
578 return len;
579 }
580
581 if (!hotkey_get(&status, &mask))
582 return -EIO;
583
584 len += sprintf(p + len, "status:\t\t%s\n", enabled(status, 0));
585 if (hotkey_mask_supported) {
586 len += sprintf(p + len, "mask:\t\t0x%04x\n", mask);
587 len += sprintf(p + len,
588 "commands:\tenable, disable, reset, <mask>\n");
589 } else {
590 len += sprintf(p + len, "mask:\t\tnot supported\n");
591 len += sprintf(p + len, "commands:\tenable, disable, reset\n");
592 }
593
594 return len;
595 }
596
597 static int hotkey_write(char *buf)
598 {
599 int status, mask;
600 char *cmd;
601 int do_cmd = 0;
602
603 if (!hotkey_supported)
604 return -ENODEV;
605
606 if (!hotkey_get(&status, &mask))
607 return -EIO;
608
609 while ((cmd = next_cmd(&buf))) {
610 if (strlencmp(cmd, "enable") == 0) {
611 status = 1;
612 } else if (strlencmp(cmd, "disable") == 0) {
613 status = 0;
614 } else if (strlencmp(cmd, "reset") == 0) {
615 status = hotkey_orig_status;
616 mask = hotkey_orig_mask;
617 } else if (sscanf(cmd, "0x%x", &mask) == 1) {
618 /* mask set */
619 } else if (sscanf(cmd, "%x", &mask) == 1) {
620 /* mask set */
621 } else
622 return -EINVAL;
623 do_cmd = 1;
624 }
625
626 if (do_cmd && !hotkey_set(status, mask))
627 return -EIO;
628
629 return 0;
630 }
631
632 static void hotkey_exit(void)
633 {
634 if (hotkey_supported)
635 hotkey_set(hotkey_orig_status, hotkey_orig_mask);
636 }
637
638 static void hotkey_notify(struct ibm_struct *ibm, u32 event)
639 {
640 int hkey;
641
642 if (acpi_evalf(hkey_handle, &hkey, "MHKP", "d"))
643 acpi_bus_generate_event(ibm->device, event, hkey);
644 else {
645 printk(IBM_ERR "unknown hotkey event %d\n", event);
646 acpi_bus_generate_event(ibm->device, event, 0);
647 }
648 }
649
650 static int bluetooth_supported;
651
652 static int bluetooth_init(void)
653 {
654 /* bluetooth not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
655 G4x, R30, R31, R40e, R50e, T20-22, X20-21 */
656 bluetooth_supported = hkey_handle &&
657 acpi_evalf(hkey_handle, NULL, "GBDC", "qv");
658
659 return 0;
660 }
661
662 static int bluetooth_status(void)
663 {
664 int status;
665
666 if (!bluetooth_supported ||
667 !acpi_evalf(hkey_handle, &status, "GBDC", "d"))
668 status = 0;
669
670 return status;
671 }
672
673 static int bluetooth_read(char *p)
674 {
675 int len = 0;
676 int status = bluetooth_status();
677
678 if (!bluetooth_supported)
679 len += sprintf(p + len, "status:\t\tnot supported\n");
680 else if (!(status & 1))
681 len += sprintf(p + len, "status:\t\tnot installed\n");
682 else {
683 len += sprintf(p + len, "status:\t\t%s\n", enabled(status, 1));
684 len += sprintf(p + len, "commands:\tenable, disable\n");
685 }
686
687 return len;
688 }
689
690 static int bluetooth_write(char *buf)
691 {
692 int status = bluetooth_status();
693 char *cmd;
694 int do_cmd = 0;
695
696 if (!bluetooth_supported)
697 return -ENODEV;
698
699 while ((cmd = next_cmd(&buf))) {
700 if (strlencmp(cmd, "enable") == 0) {
701 status |= 2;
702 } else if (strlencmp(cmd, "disable") == 0) {
703 status &= ~2;
704 } else
705 return -EINVAL;
706 do_cmd = 1;
707 }
708
709 if (do_cmd && !acpi_evalf(hkey_handle, NULL, "SBDC", "vd", status))
710 return -EIO;
711
712 return 0;
713 }
714
715 static int wan_supported;
716
717 static int wan_init(void)
718 {
719 wan_supported = hkey_handle &&
720 acpi_evalf(hkey_handle, NULL, "GWAN", "qv");
721
722 return 0;
723 }
724
725 static int wan_status(void)
726 {
727 int status;
728
729 if (!wan_supported || !acpi_evalf(hkey_handle, &status, "GWAN", "d"))
730 status = 0;
731
732 return status;
733 }
734
735 static int wan_read(char *p)
736 {
737 int len = 0;
738 int status = wan_status();
739
740 if (!wan_supported)
741 len += sprintf(p + len, "status:\t\tnot supported\n");
742 else if (!(status & 1))
743 len += sprintf(p + len, "status:\t\tnot installed\n");
744 else {
745 len += sprintf(p + len, "status:\t\t%s\n", enabled(status, 1));
746 len += sprintf(p + len, "commands:\tenable, disable\n");
747 }
748
749 return len;
750 }
751
752 static int wan_write(char *buf)
753 {
754 int status = wan_status();
755 char *cmd;
756 int do_cmd = 0;
757
758 if (!wan_supported)
759 return -ENODEV;
760
761 while ((cmd = next_cmd(&buf))) {
762 if (strlencmp(cmd, "enable") == 0) {
763 status |= 2;
764 } else if (strlencmp(cmd, "disable") == 0) {
765 status &= ~2;
766 } else
767 return -EINVAL;
768 do_cmd = 1;
769 }
770
771 if (do_cmd && !acpi_evalf(hkey_handle, NULL, "SWAN", "vd", status))
772 return -EIO;
773
774 return 0;
775 }
776
777 enum video_access_mode {
778 IBMACPI_VIDEO_NONE = 0,
779 IBMACPI_VIDEO_570, /* 570 */
780 IBMACPI_VIDEO_770, /* 600e/x, 770e, 770x */
781 IBMACPI_VIDEO_NEW, /* all others */
782 };
783
784 static enum video_access_mode video_supported;
785 static int video_orig_autosw;
786
787 static int video_init(void)
788 {
789 int ivga;
790
791 if (vid2_handle && acpi_evalf(NULL, &ivga, "\\IVGA", "d") && ivga)
792 /* G41, assume IVGA doesn't change */
793 vid_handle = vid2_handle;
794
795 if (!vid_handle)
796 /* video switching not supported on R30, R31 */
797 video_supported = IBMACPI_VIDEO_NONE;
798 else if (acpi_evalf(vid_handle, &video_orig_autosw, "SWIT", "qd"))
799 /* 570 */
800 video_supported = IBMACPI_VIDEO_570;
801 else if (acpi_evalf(vid_handle, &video_orig_autosw, "^VADL", "qd"))
802 /* 600e/x, 770e, 770x */
803 video_supported = IBMACPI_VIDEO_770;
804 else
805 /* all others */
806 video_supported = IBMACPI_VIDEO_NEW;
807
808 return 0;
809 }
810
811 static int video_status(void)
812 {
813 int status = 0;
814 int i;
815
816 if (video_supported == IBMACPI_VIDEO_570) {
817 if (acpi_evalf(NULL, &i, "\\_SB.PHS", "dd", 0x87))
818 status = i & 3;
819 } else if (video_supported == IBMACPI_VIDEO_770) {
820 if (acpi_evalf(NULL, &i, "\\VCDL", "d"))
821 status |= 0x01 * i;
822 if (acpi_evalf(NULL, &i, "\\VCDC", "d"))
823 status |= 0x02 * i;
824 } else if (video_supported == IBMACPI_VIDEO_NEW) {
825 acpi_evalf(NULL, NULL, "\\VUPS", "vd", 1);
826 if (acpi_evalf(NULL, &i, "\\VCDC", "d"))
827 status |= 0x02 * i;
828
829 acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0);
830 if (acpi_evalf(NULL, &i, "\\VCDL", "d"))
831 status |= 0x01 * i;
832 if (acpi_evalf(NULL, &i, "\\VCDD", "d"))
833 status |= 0x08 * i;
834 }
835
836 return status;
837 }
838
839 static int video_autosw(void)
840 {
841 int autosw = 0;
842
843 if (video_supported == IBMACPI_VIDEO_570)
844 acpi_evalf(vid_handle, &autosw, "SWIT", "d");
845 else if (video_supported == IBMACPI_VIDEO_770 ||
846 video_supported == IBMACPI_VIDEO_NEW)
847 acpi_evalf(vid_handle, &autosw, "^VDEE", "d");
848
849 return autosw & 1;
850 }
851
852 static int video_read(char *p)
853 {
854 int status = video_status();
855 int autosw = video_autosw();
856 int len = 0;
857
858 if (!video_supported) {
859 len += sprintf(p + len, "status:\t\tnot supported\n");
860 return len;
861 }
862
863 len += sprintf(p + len, "status:\t\tsupported\n");
864 len += sprintf(p + len, "lcd:\t\t%s\n", enabled(status, 0));
865 len += sprintf(p + len, "crt:\t\t%s\n", enabled(status, 1));
866 if (video_supported == IBMACPI_VIDEO_NEW)
867 len += sprintf(p + len, "dvi:\t\t%s\n", enabled(status, 3));
868 len += sprintf(p + len, "auto:\t\t%s\n", enabled(autosw, 0));
869 len += sprintf(p + len, "commands:\tlcd_enable, lcd_disable\n");
870 len += sprintf(p + len, "commands:\tcrt_enable, crt_disable\n");
871 if (video_supported == IBMACPI_VIDEO_NEW)
872 len += sprintf(p + len, "commands:\tdvi_enable, dvi_disable\n");
873 len += sprintf(p + len, "commands:\tauto_enable, auto_disable\n");
874 len += sprintf(p + len, "commands:\tvideo_switch, expand_toggle\n");
875
876 return len;
877 }
878
879 static int video_switch(void)
880 {
881 int autosw = video_autosw();
882 int ret;
883
884 if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", 1))
885 return -EIO;
886 ret = video_supported == IBMACPI_VIDEO_570 ?
887 acpi_evalf(ec_handle, NULL, "_Q16", "v") :
888 acpi_evalf(vid_handle, NULL, "VSWT", "v");
889 acpi_evalf(vid_handle, NULL, "_DOS", "vd", autosw);
890
891 return ret;
892 }
893
894 static int video_expand(void)
895 {
896 if (video_supported == IBMACPI_VIDEO_570)
897 return acpi_evalf(ec_handle, NULL, "_Q17", "v");
898 else if (video_supported == IBMACPI_VIDEO_770)
899 return acpi_evalf(vid_handle, NULL, "VEXP", "v");
900 else
901 return acpi_evalf(NULL, NULL, "\\VEXP", "v");
902 }
903
904 static int video_switch2(int status)
905 {
906 int ret;
907
908 if (video_supported == IBMACPI_VIDEO_570) {
909 ret = acpi_evalf(NULL, NULL,
910 "\\_SB.PHS2", "vdd", 0x8b, status | 0x80);
911 } else if (video_supported == IBMACPI_VIDEO_770) {
912 int autosw = video_autosw();
913 if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", 1))
914 return -EIO;
915
916 ret = acpi_evalf(vid_handle, NULL,
917 "ASWT", "vdd", status * 0x100, 0);
918
919 acpi_evalf(vid_handle, NULL, "_DOS", "vd", autosw);
920 } else {
921 ret = acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0x80) &&
922 acpi_evalf(NULL, NULL, "\\VSDS", "vdd", status, 1);
923 }
924
925 return ret;
926 }
927
928 static int video_write(char *buf)
929 {
930 char *cmd;
931 int enable, disable, status;
932
933 if (!video_supported)
934 return -ENODEV;
935
936 enable = disable = 0;
937
938 while ((cmd = next_cmd(&buf))) {
939 if (strlencmp(cmd, "lcd_enable") == 0) {
940 enable |= 0x01;
941 } else if (strlencmp(cmd, "lcd_disable") == 0) {
942 disable |= 0x01;
943 } else if (strlencmp(cmd, "crt_enable") == 0) {
944 enable |= 0x02;
945 } else if (strlencmp(cmd, "crt_disable") == 0) {
946 disable |= 0x02;
947 } else if (video_supported == IBMACPI_VIDEO_NEW &&
948 strlencmp(cmd, "dvi_enable") == 0) {
949 enable |= 0x08;
950 } else if (video_supported == IBMACPI_VIDEO_NEW &&
951 strlencmp(cmd, "dvi_disable") == 0) {
952 disable |= 0x08;
953 } else if (strlencmp(cmd, "auto_enable") == 0) {
954 if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", 1))
955 return -EIO;
956 } else if (strlencmp(cmd, "auto_disable") == 0) {
957 if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", 0))
958 return -EIO;
959 } else if (strlencmp(cmd, "video_switch") == 0) {
960 if (!video_switch())
961 return -EIO;
962 } else if (strlencmp(cmd, "expand_toggle") == 0) {
963 if (!video_expand())
964 return -EIO;
965 } else
966 return -EINVAL;
967 }
968
969 if (enable || disable) {
970 status = (video_status() & 0x0f & ~disable) | enable;
971 if (!video_switch2(status))
972 return -EIO;
973 }
974
975 return 0;
976 }
977
978 static void video_exit(void)
979 {
980 acpi_evalf(vid_handle, NULL, "_DOS", "vd", video_orig_autosw);
981 }
982
983 static int light_supported;
984 static int light_status_supported;
985
986 static int light_init(void)
987 {
988 /* light not supported on 570, 600e/x, 770e, 770x, G4x, R30, R31 */
989 light_supported = (cmos_handle || lght_handle) && !ledb_handle;
990
991 if (light_supported)
992 /* light status not supported on
993 570, 600e/x, 770e, 770x, G4x, R30, R31, R32, X20 */
994 light_status_supported = acpi_evalf(ec_handle, NULL,
995 "KBLT", "qv");
996
997 return 0;
998 }
999
1000 static int light_read(char *p)
1001 {
1002 int len = 0;
1003 int status = 0;
1004
1005 if (!light_supported) {
1006 len += sprintf(p + len, "status:\t\tnot supported\n");
1007 } else if (!light_status_supported) {
1008 len += sprintf(p + len, "status:\t\tunknown\n");
1009 len += sprintf(p + len, "commands:\ton, off\n");
1010 } else {
1011 if (!acpi_evalf(ec_handle, &status, "KBLT", "d"))
1012 return -EIO;
1013 len += sprintf(p + len, "status:\t\t%s\n", onoff(status, 0));
1014 len += sprintf(p + len, "commands:\ton, off\n");
1015 }
1016
1017 return len;
1018 }
1019
1020 static int light_write(char *buf)
1021 {
1022 int cmos_cmd, lght_cmd;
1023 char *cmd;
1024 int success;
1025
1026 if (!light_supported)
1027 return -ENODEV;
1028
1029 while ((cmd = next_cmd(&buf))) {
1030 if (strlencmp(cmd, "on") == 0) {
1031 cmos_cmd = 0x0c;
1032 lght_cmd = 1;
1033 } else if (strlencmp(cmd, "off") == 0) {
1034 cmos_cmd = 0x0d;
1035 lght_cmd = 0;
1036 } else
1037 return -EINVAL;
1038
1039 success = cmos_handle ?
1040 acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd) :
1041 acpi_evalf(lght_handle, NULL, NULL, "vd", lght_cmd);
1042 if (!success)
1043 return -EIO;
1044 }
1045
1046 return 0;
1047 }
1048
1049 #if defined(CONFIG_ACPI_IBM_DOCK) || defined(CONFIG_ACPI_IBM_BAY)
1050 static int _sta(acpi_handle handle)
1051 {
1052 int status;
1053
1054 if (!handle || !acpi_evalf(handle, &status, "_STA", "d"))
1055 status = 0;
1056
1057 return status;
1058 }
1059 #endif
1060
1061 #ifdef CONFIG_ACPI_IBM_DOCK
1062 #define dock_docked() (_sta(dock_handle) & 1)
1063
1064 static int dock_read(char *p)
1065 {
1066 int len = 0;
1067 int docked = dock_docked();
1068
1069 if (!dock_handle)
1070 len += sprintf(p + len, "status:\t\tnot supported\n");
1071 else if (!docked)
1072 len += sprintf(p + len, "status:\t\tundocked\n");
1073 else {
1074 len += sprintf(p + len, "status:\t\tdocked\n");
1075 len += sprintf(p + len, "commands:\tdock, undock\n");
1076 }
1077
1078 return len;
1079 }
1080
1081 static int dock_write(char *buf)
1082 {
1083 char *cmd;
1084
1085 if (!dock_docked())
1086 return -ENODEV;
1087
1088 while ((cmd = next_cmd(&buf))) {
1089 if (strlencmp(cmd, "undock") == 0) {
1090 if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 0) ||
1091 !acpi_evalf(dock_handle, NULL, "_EJ0", "vd", 1))
1092 return -EIO;
1093 } else if (strlencmp(cmd, "dock") == 0) {
1094 if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 1))
1095 return -EIO;
1096 } else
1097 return -EINVAL;
1098 }
1099
1100 return 0;
1101 }
1102
1103 static void dock_notify(struct ibm_struct *ibm, u32 event)
1104 {
1105 int docked = dock_docked();
1106 int pci = ibm->hid && strstr(ibm->hid, IBM_PCI_HID);
1107
1108 if (event == 1 && !pci) /* 570 */
1109 acpi_bus_generate_event(ibm->device, event, 1); /* button */
1110 else if (event == 1 && pci) /* 570 */
1111 acpi_bus_generate_event(ibm->device, event, 3); /* dock */
1112 else if (event == 3 && docked)
1113 acpi_bus_generate_event(ibm->device, event, 1); /* button */
1114 else if (event == 3 && !docked)
1115 acpi_bus_generate_event(ibm->device, event, 2); /* undock */
1116 else if (event == 0 && docked)
1117 acpi_bus_generate_event(ibm->device, event, 3); /* dock */
1118 else {
1119 printk(IBM_ERR "unknown dock event %d, status %d\n",
1120 event, _sta(dock_handle));
1121 acpi_bus_generate_event(ibm->device, event, 0); /* unknown */
1122 }
1123 }
1124 #endif
1125
1126 #ifdef CONFIG_ACPI_IBM_BAY
1127 static int bay_status_supported;
1128 static int bay_status2_supported;
1129 static int bay_eject_supported;
1130 static int bay_eject2_supported;
1131
1132 static int bay_init(void)
1133 {
1134 bay_status_supported = bay_handle &&
1135 acpi_evalf(bay_handle, NULL, "_STA", "qv");
1136 bay_status2_supported = bay2_handle &&
1137 acpi_evalf(bay2_handle, NULL, "_STA", "qv");
1138
1139 bay_eject_supported = bay_handle && bay_ej_handle &&
1140 (strlencmp(bay_ej_path, "_EJ0") == 0 || experimental);
1141 bay_eject2_supported = bay2_handle && bay2_ej_handle &&
1142 (strlencmp(bay2_ej_path, "_EJ0") == 0 || experimental);
1143
1144 return 0;
1145 }
1146
1147 #define bay_occupied(b) (_sta(b##_handle) & 1)
1148
1149 static int bay_read(char *p)
1150 {
1151 int len = 0;
1152 int occupied = bay_occupied(bay);
1153 int occupied2 = bay_occupied(bay2);
1154 int eject, eject2;
1155
1156 len += sprintf(p + len, "status:\t\t%s\n", bay_status_supported ?
1157 (occupied ? "occupied" : "unoccupied") :
1158 "not supported");
1159 if (bay_status2_supported)
1160 len += sprintf(p + len, "status2:\t%s\n", occupied2 ?
1161 "occupied" : "unoccupied");
1162
1163 eject = bay_eject_supported && occupied;
1164 eject2 = bay_eject2_supported && occupied2;
1165
1166 if (eject && eject2)
1167 len += sprintf(p + len, "commands:\teject, eject2\n");
1168 else if (eject)
1169 len += sprintf(p + len, "commands:\teject\n");
1170 else if (eject2)
1171 len += sprintf(p + len, "commands:\teject2\n");
1172
1173 return len;
1174 }
1175
1176 static int bay_write(char *buf)
1177 {
1178 char *cmd;
1179
1180 if (!bay_eject_supported && !bay_eject2_supported)
1181 return -ENODEV;
1182
1183 while ((cmd = next_cmd(&buf))) {
1184 if (bay_eject_supported && strlencmp(cmd, "eject") == 0) {
1185 if (!acpi_evalf(bay_ej_handle, NULL, NULL, "vd", 1))
1186 return -EIO;
1187 } else if (bay_eject2_supported &&
1188 strlencmp(cmd, "eject2") == 0) {
1189 if (!acpi_evalf(bay2_ej_handle, NULL, NULL, "vd", 1))
1190 return -EIO;
1191 } else
1192 return -EINVAL;
1193 }
1194
1195 return 0;
1196 }
1197
1198 static void bay_notify(struct ibm_struct *ibm, u32 event)
1199 {
1200 acpi_bus_generate_event(ibm->device, event, 0);
1201 }
1202 #endif /* CONFIG_ACPI_IBM_BAY */
1203
1204 static int cmos_read(char *p)
1205 {
1206 int len = 0;
1207
1208 /* cmos not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
1209 R30, R31, T20-22, X20-21 */
1210 if (!cmos_handle)
1211 len += sprintf(p + len, "status:\t\tnot supported\n");
1212 else {
1213 len += sprintf(p + len, "status:\t\tsupported\n");
1214 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-21)\n");
1215 }
1216
1217 return len;
1218 }
1219
1220 static int cmos_eval(int cmos_cmd)
1221 {
1222 if (cmos_handle)
1223 return acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd);
1224 else
1225 return 1;
1226 }
1227
1228 static int cmos_write(char *buf)
1229 {
1230 char *cmd;
1231 int cmos_cmd;
1232
1233 if (!cmos_handle)
1234 return -EINVAL;
1235
1236 while ((cmd = next_cmd(&buf))) {
1237 if (sscanf(cmd, "%u", &cmos_cmd) == 1 &&
1238 cmos_cmd >= 0 && cmos_cmd <= 21) {
1239 /* cmos_cmd set */
1240 } else
1241 return -EINVAL;
1242
1243 if (!cmos_eval(cmos_cmd))
1244 return -EIO;
1245 }
1246
1247 return 0;
1248 }
1249
1250 enum led_access_mode {
1251 IBMACPI_LED_NONE = 0,
1252 IBMACPI_LED_570, /* 570 */
1253 IBMACPI_LED_OLD, /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
1254 IBMACPI_LED_NEW, /* all others */
1255 };
1256 static enum led_access_mode led_supported;
1257
1258 static int led_init(void)
1259 {
1260 if (!led_handle)
1261 /* led not supported on R30, R31 */
1262 led_supported = IBMACPI_LED_NONE;
1263 else if (strlencmp(led_path, "SLED") == 0)
1264 /* 570 */
1265 led_supported = IBMACPI_LED_570;
1266 else if (strlencmp(led_path, "SYSL") == 0)
1267 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
1268 led_supported = IBMACPI_LED_OLD;
1269 else
1270 /* all others */
1271 led_supported = IBMACPI_LED_NEW;
1272
1273 return 0;
1274 }
1275
1276 #define led_status(s) ((s) == 0 ? "off" : ((s) == 1 ? "on" : "blinking"))
1277
1278 static int led_read(char *p)
1279 {
1280 int len = 0;
1281
1282 if (!led_supported) {
1283 len += sprintf(p + len, "status:\t\tnot supported\n");
1284 return len;
1285 }
1286 len += sprintf(p + len, "status:\t\tsupported\n");
1287
1288 if (led_supported == IBMACPI_LED_570) {
1289 /* 570 */
1290 int i, status;
1291 for (i = 0; i < 8; i++) {
1292 if (!acpi_evalf(ec_handle,
1293 &status, "GLED", "dd", 1 << i))
1294 return -EIO;
1295 len += sprintf(p + len, "%d:\t\t%s\n",
1296 i, led_status(status));
1297 }
1298 }
1299
1300 len += sprintf(p + len, "commands:\t"
1301 "<led> on, <led> off, <led> blink (<led> is 0-7)\n");
1302
1303 return len;
1304 }
1305
1306 /* off, on, blink */
1307 static const int led_sled_arg1[] = { 0, 1, 3 };
1308 static const int led_exp_hlbl[] = { 0, 0, 1 }; /* led# * */
1309 static const int led_exp_hlcl[] = { 0, 1, 1 }; /* led# * */
1310 static const int led_led_arg1[] = { 0, 0x80, 0xc0 };
1311
1312 #define EC_HLCL 0x0c
1313 #define EC_HLBL 0x0d
1314 #define EC_HLMS 0x0e
1315
1316 static int led_write(char *buf)
1317 {
1318 char *cmd;
1319 int led, ind, ret;
1320
1321 if (!led_supported)
1322 return -ENODEV;
1323
1324 while ((cmd = next_cmd(&buf))) {
1325 if (sscanf(cmd, "%d", &led) != 1 || led < 0 || led > 7)
1326 return -EINVAL;
1327
1328 if (strstr(cmd, "off")) {
1329 ind = 0;
1330 } else if (strstr(cmd, "on")) {
1331 ind = 1;
1332 } else if (strstr(cmd, "blink")) {
1333 ind = 2;
1334 } else
1335 return -EINVAL;
1336
1337 if (led_supported == IBMACPI_LED_570) {
1338 /* 570 */
1339 led = 1 << led;
1340 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
1341 led, led_sled_arg1[ind]))
1342 return -EIO;
1343 } else if (led_supported == IBMACPI_LED_OLD) {
1344 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */
1345 led = 1 << led;
1346 ret = ec_write(EC_HLMS, led);
1347 if (ret >= 0)
1348 ret =
1349 ec_write(EC_HLBL, led * led_exp_hlbl[ind]);
1350 if (ret >= 0)
1351 ret =
1352 ec_write(EC_HLCL, led * led_exp_hlcl[ind]);
1353 if (ret < 0)
1354 return ret;
1355 } else {
1356 /* all others */
1357 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
1358 led, led_led_arg1[ind]))
1359 return -EIO;
1360 }
1361 }
1362
1363 return 0;
1364 }
1365
1366 static int beep_read(char *p)
1367 {
1368 int len = 0;
1369
1370 if (!beep_handle)
1371 len += sprintf(p + len, "status:\t\tnot supported\n");
1372 else {
1373 len += sprintf(p + len, "status:\t\tsupported\n");
1374 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-17)\n");
1375 }
1376
1377 return len;
1378 }
1379
1380 static int beep_write(char *buf)
1381 {
1382 char *cmd;
1383 int beep_cmd;
1384
1385 if (!beep_handle)
1386 return -ENODEV;
1387
1388 while ((cmd = next_cmd(&buf))) {
1389 if (sscanf(cmd, "%u", &beep_cmd) == 1 &&
1390 beep_cmd >= 0 && beep_cmd <= 17) {
1391 /* beep_cmd set */
1392 } else
1393 return -EINVAL;
1394 if (!acpi_evalf(beep_handle, NULL, NULL, "vdd", beep_cmd, 0))
1395 return -EIO;
1396 }
1397
1398 return 0;
1399 }
1400
1401 static int acpi_ec_read(int i, u8 * p)
1402 {
1403 int v;
1404
1405 if (ecrd_handle) {
1406 if (!acpi_evalf(ecrd_handle, &v, NULL, "dd", i))
1407 return 0;
1408 *p = v;
1409 } else {
1410 if (ec_read(i, p) < 0)
1411 return 0;
1412 }
1413
1414 return 1;
1415 }
1416
1417 static int acpi_ec_write(int i, u8 v)
1418 {
1419 if (ecwr_handle) {
1420 if (!acpi_evalf(ecwr_handle, NULL, NULL, "vdd", i, v))
1421 return 0;
1422 } else {
1423 if (ec_write(i, v) < 0)
1424 return 0;
1425 }
1426
1427 return 1;
1428 }
1429
1430 static enum thermal_access_mode thermal_read_mode;
1431
1432 static int thermal_init(void)
1433 {
1434 u8 t, ta1, ta2;
1435 int i;
1436 int acpi_tmp7 = acpi_evalf(ec_handle, NULL, "TMP7", "qv");
1437
1438 if (ibm_thinkpad_ec_found && experimental) {
1439 /*
1440 * Direct EC access mode: sensors at registers
1441 * 0x78-0x7F, 0xC0-0xC7. Registers return 0x00 for
1442 * non-implemented, thermal sensors return 0x80 when
1443 * not available
1444 */
1445
1446 ta1 = ta2 = 0;
1447 for (i = 0; i < 8; i++) {
1448 if (likely(acpi_ec_read(0x78 + i, &t))) {
1449 ta1 |= t;
1450 } else {
1451 ta1 = 0;
1452 break;
1453 }
1454 if (likely(acpi_ec_read(0xC0 + i, &t))) {
1455 ta2 |= t;
1456 } else {
1457 ta1 = 0;
1458 break;
1459 }
1460 }
1461 if (ta1 == 0) {
1462 /* This is sheer paranoia, but we handle it anyway */
1463 if (acpi_tmp7) {
1464 printk(IBM_ERR
1465 "ThinkPad ACPI EC access misbehaving, "
1466 "falling back to ACPI TMPx access mode\n");
1467 thermal_read_mode = IBMACPI_THERMAL_ACPI_TMP07;
1468 } else {
1469 printk(IBM_ERR
1470 "ThinkPad ACPI EC access misbehaving, "
1471 "disabling thermal sensors access\n");
1472 thermal_read_mode = IBMACPI_THERMAL_NONE;
1473 }
1474 } else {
1475 thermal_read_mode =
1476 (ta2 != 0) ?
1477 IBMACPI_THERMAL_TPEC_16 : IBMACPI_THERMAL_TPEC_8;
1478 }
1479 } else if (acpi_tmp7) {
1480 if (acpi_evalf(ec_handle, NULL, "UPDT", "qv")) {
1481 /* 600e/x, 770e, 770x */
1482 thermal_read_mode = IBMACPI_THERMAL_ACPI_UPDT;
1483 } else {
1484 /* Standard ACPI TMPx access, max 8 sensors */
1485 thermal_read_mode = IBMACPI_THERMAL_ACPI_TMP07;
1486 }
1487 } else {
1488 /* temperatures not supported on 570, G4x, R30, R31, R32 */
1489 thermal_read_mode = IBMACPI_THERMAL_NONE;
1490 }
1491
1492 return 0;
1493 }
1494
1495 static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s)
1496 {
1497 int i, t;
1498 s8 tmp;
1499 char tmpi[] = "TMPi";
1500
1501 if (!s)
1502 return -EINVAL;
1503
1504 switch (thermal_read_mode) {
1505 #if IBMACPI_MAX_THERMAL_SENSORS >= 16
1506 case IBMACPI_THERMAL_TPEC_16:
1507 for (i = 0; i < 8; i++) {
1508 if (!acpi_ec_read(0xC0 + i, &tmp))
1509 return -EIO;
1510 s->temp[i + 8] = tmp * 1000;
1511 }
1512 /* fallthrough */
1513 #endif
1514 case IBMACPI_THERMAL_TPEC_8:
1515 for (i = 0; i < 8; i++) {
1516 if (!acpi_ec_read(0x78 + i, &tmp))
1517 return -EIO;
1518 s->temp[i] = tmp * 1000;
1519 }
1520 return (thermal_read_mode == IBMACPI_THERMAL_TPEC_16) ? 16 : 8;
1521
1522 case IBMACPI_THERMAL_ACPI_UPDT:
1523 if (!acpi_evalf(ec_handle, NULL, "UPDT", "v"))
1524 return -EIO;
1525 for (i = 0; i < 8; i++) {
1526 tmpi[3] = '0' + i;
1527 if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
1528 return -EIO;
1529 s->temp[i] = (t - 2732) * 100;
1530 }
1531 return 8;
1532
1533 case IBMACPI_THERMAL_ACPI_TMP07:
1534 for (i = 0; i < 8; i++) {
1535 tmpi[3] = '0' + i;
1536 if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
1537 return -EIO;
1538 s->temp[i] = t * 1000;
1539 }
1540 return 8;
1541
1542 case IBMACPI_THERMAL_NONE:
1543 default:
1544 return 0;
1545 }
1546 }
1547
1548 static int thermal_read(char *p)
1549 {
1550 int len = 0;
1551 int n, i;
1552 struct ibm_thermal_sensors_struct t;
1553
1554 n = thermal_get_sensors(&t);
1555 if (unlikely(n < 0))
1556 return n;
1557
1558 len += sprintf(p + len, "temperatures:\t");
1559
1560 if (n > 0) {
1561 for (i = 0; i < (n - 1); i++)
1562 len += sprintf(p + len, "%d ", t.temp[i] / 1000);
1563 len += sprintf(p + len, "%d\n", t.temp[i] / 1000);
1564 } else
1565 len += sprintf(p + len, "not supported\n");
1566
1567 return len;
1568 }
1569
1570 static u8 ecdump_regs[256];
1571
1572 static int ecdump_read(char *p)
1573 {
1574 int len = 0;
1575 int i, j;
1576 u8 v;
1577
1578 len += sprintf(p + len, "EC "
1579 " +00 +01 +02 +03 +04 +05 +06 +07"
1580 " +08 +09 +0a +0b +0c +0d +0e +0f\n");
1581 for (i = 0; i < 256; i += 16) {
1582 len += sprintf(p + len, "EC 0x%02x:", i);
1583 for (j = 0; j < 16; j++) {
1584 if (!acpi_ec_read(i + j, &v))
1585 break;
1586 if (v != ecdump_regs[i + j])
1587 len += sprintf(p + len, " *%02x", v);
1588 else
1589 len += sprintf(p + len, " %02x", v);
1590 ecdump_regs[i + j] = v;
1591 }
1592 len += sprintf(p + len, "\n");
1593 if (j != 16)
1594 break;
1595 }
1596
1597 /* These are way too dangerous to advertise openly... */
1598 #if 0
1599 len += sprintf(p + len, "commands:\t0x<offset> 0x<value>"
1600 " (<offset> is 00-ff, <value> is 00-ff)\n");
1601 len += sprintf(p + len, "commands:\t0x<offset> <value> "
1602 " (<offset> is 00-ff, <value> is 0-255)\n");
1603 #endif
1604 return len;
1605 }
1606
1607 static int ecdump_write(char *buf)
1608 {
1609 char *cmd;
1610 int i, v;
1611
1612 while ((cmd = next_cmd(&buf))) {
1613 if (sscanf(cmd, "0x%x 0x%x", &i, &v) == 2) {
1614 /* i and v set */
1615 } else if (sscanf(cmd, "0x%x %u", &i, &v) == 2) {
1616 /* i and v set */
1617 } else
1618 return -EINVAL;
1619 if (i >= 0 && i < 256 && v >= 0 && v < 256) {
1620 if (!acpi_ec_write(i, v))
1621 return -EIO;
1622 } else
1623 return -EINVAL;
1624 }
1625
1626 return 0;
1627 }
1628
1629 static int brightness_offset = 0x31;
1630
1631 static int brightness_get(struct backlight_device *bd)
1632 {
1633 u8 level;
1634 if (!acpi_ec_read(brightness_offset, &level))
1635 return -EIO;
1636
1637 level &= 0x7;
1638
1639 return level;
1640 }
1641
1642 static int brightness_read(char *p)
1643 {
1644 int len = 0;
1645 int level;
1646
1647 if ((level = brightness_get(NULL)) < 0) {
1648 len += sprintf(p + len, "level:\t\tunreadable\n");
1649 } else {
1650 len += sprintf(p + len, "level:\t\t%d\n", level & 0x7);
1651 len += sprintf(p + len, "commands:\tup, down\n");
1652 len += sprintf(p + len, "commands:\tlevel <level>"
1653 " (<level> is 0-7)\n");
1654 }
1655
1656 return len;
1657 }
1658
1659 #define BRIGHTNESS_UP 4
1660 #define BRIGHTNESS_DOWN 5
1661
1662 static int brightness_set(int value)
1663 {
1664 int cmos_cmd, inc, i;
1665 int current_value = brightness_get(NULL);
1666
1667 value &= 7;
1668
1669 cmos_cmd = value > current_value ? BRIGHTNESS_UP : BRIGHTNESS_DOWN;
1670 inc = value > current_value ? 1 : -1;
1671 for (i = current_value; i != value; i += inc) {
1672 if (!cmos_eval(cmos_cmd))
1673 return -EIO;
1674 if (!acpi_ec_write(brightness_offset, i + inc))
1675 return -EIO;
1676 }
1677
1678 return 0;
1679 }
1680
1681 static int brightness_write(char *buf)
1682 {
1683 int level;
1684 int new_level;
1685 char *cmd;
1686
1687 while ((cmd = next_cmd(&buf))) {
1688 if ((level = brightness_get(NULL)) < 0)
1689 return level;
1690 level &= 7;
1691
1692 if (strlencmp(cmd, "up") == 0) {
1693 new_level = level == 7 ? 7 : level + 1;
1694 } else if (strlencmp(cmd, "down") == 0) {
1695 new_level = level == 0 ? 0 : level - 1;
1696 } else if (sscanf(cmd, "level %d", &new_level) == 1 &&
1697 new_level >= 0 && new_level <= 7) {
1698 /* new_level set */
1699 } else
1700 return -EINVAL;
1701
1702 brightness_set(new_level);
1703 }
1704
1705 return 0;
1706 }
1707
1708 static int brightness_update_status(struct backlight_device *bd)
1709 {
1710 return brightness_set(bd->props->brightness);
1711 }
1712
1713 static struct backlight_properties ibm_backlight_data = {
1714 .owner = THIS_MODULE,
1715 .get_brightness = brightness_get,
1716 .update_status = brightness_update_status,
1717 .max_brightness = 7,
1718 };
1719
1720 static int brightness_init(void)
1721 {
1722 ibm_backlight_device = backlight_device_register("ibm", NULL, NULL,
1723 &ibm_backlight_data);
1724 if (IS_ERR(ibm_backlight_device)) {
1725 printk(IBM_ERR "Could not register backlight device\n");
1726 return PTR_ERR(ibm_backlight_device);
1727 }
1728
1729 return 0;
1730 }
1731
1732 static void brightness_exit(void)
1733 {
1734 if (ibm_backlight_device) {
1735 backlight_device_unregister(ibm_backlight_device);
1736 ibm_backlight_device = NULL;
1737 }
1738 }
1739
1740 static int volume_offset = 0x30;
1741
1742 static int volume_read(char *p)
1743 {
1744 int len = 0;
1745 u8 level;
1746
1747 if (!acpi_ec_read(volume_offset, &level)) {
1748 len += sprintf(p + len, "level:\t\tunreadable\n");
1749 } else {
1750 len += sprintf(p + len, "level:\t\t%d\n", level & 0xf);
1751 len += sprintf(p + len, "mute:\t\t%s\n", onoff(level, 6));
1752 len += sprintf(p + len, "commands:\tup, down, mute\n");
1753 len += sprintf(p + len, "commands:\tlevel <level>"
1754 " (<level> is 0-15)\n");
1755 }
1756
1757 return len;
1758 }
1759
1760 #define VOLUME_DOWN 0
1761 #define VOLUME_UP 1
1762 #define VOLUME_MUTE 2
1763
1764 static int volume_write(char *buf)
1765 {
1766 int cmos_cmd, inc, i;
1767 u8 level, mute;
1768 int new_level, new_mute;
1769 char *cmd;
1770
1771 while ((cmd = next_cmd(&buf))) {
1772 if (!acpi_ec_read(volume_offset, &level))
1773 return -EIO;
1774 new_mute = mute = level & 0x40;
1775 new_level = level = level & 0xf;
1776
1777 if (strlencmp(cmd, "up") == 0) {
1778 if (mute)
1779 new_mute = 0;
1780 else
1781 new_level = level == 15 ? 15 : level + 1;
1782 } else if (strlencmp(cmd, "down") == 0) {
1783 if (mute)
1784 new_mute = 0;
1785 else
1786 new_level = level == 0 ? 0 : level - 1;
1787 } else if (sscanf(cmd, "level %d", &new_level) == 1 &&
1788 new_level >= 0 && new_level <= 15) {
1789 /* new_level set */
1790 } else if (strlencmp(cmd, "mute") == 0) {
1791 new_mute = 0x40;
1792 } else
1793 return -EINVAL;
1794
1795 if (new_level != level) { /* mute doesn't change */
1796 cmos_cmd = new_level > level ? VOLUME_UP : VOLUME_DOWN;
1797 inc = new_level > level ? 1 : -1;
1798
1799 if (mute && (!cmos_eval(cmos_cmd) ||
1800 !acpi_ec_write(volume_offset, level)))
1801 return -EIO;
1802
1803 for (i = level; i != new_level; i += inc)
1804 if (!cmos_eval(cmos_cmd) ||
1805 !acpi_ec_write(volume_offset, i + inc))
1806 return -EIO;
1807
1808 if (mute && (!cmos_eval(VOLUME_MUTE) ||
1809 !acpi_ec_write(volume_offset,
1810 new_level + mute)))
1811 return -EIO;
1812 }
1813
1814 if (new_mute != mute) { /* level doesn't change */
1815 cmos_cmd = new_mute ? VOLUME_MUTE : VOLUME_UP;
1816
1817 if (!cmos_eval(cmos_cmd) ||
1818 !acpi_ec_write(volume_offset, level + new_mute))
1819 return -EIO;
1820 }
1821 }
1822
1823 return 0;
1824 }
1825
1826 static enum fan_status_access_mode fan_status_access_mode;
1827 static enum fan_control_access_mode fan_control_access_mode;
1828 static enum fan_control_commands fan_control_commands;
1829
1830 static int fan_control_status_known;
1831 static u8 fan_control_initial_status;
1832
1833 static void fan_watchdog_fire(struct work_struct *ignored);
1834 static int fan_watchdog_maxinterval;
1835 static DECLARE_DELAYED_WORK(fan_watchdog_task, fan_watchdog_fire);
1836
1837 static int fan_init(void)
1838 {
1839 fan_status_access_mode = IBMACPI_FAN_NONE;
1840 fan_control_access_mode = IBMACPI_FAN_WR_NONE;
1841 fan_control_commands = 0;
1842 fan_control_status_known = 1;
1843 fan_watchdog_maxinterval = 0;
1844
1845 if (gfan_handle) {
1846 /* 570, 600e/x, 770e, 770x */
1847 fan_status_access_mode = IBMACPI_FAN_RD_ACPI_GFAN;
1848 } else {
1849 /* all other ThinkPads: note that even old-style
1850 * ThinkPad ECs supports the fan control register */
1851 if (likely(acpi_ec_read(fan_status_offset,
1852 &fan_control_initial_status))) {
1853 fan_status_access_mode = IBMACPI_FAN_RD_TPEC;
1854
1855 /* In some ThinkPads, neither the EC nor the ACPI
1856 * DSDT initialize the fan status, and it ends up
1857 * being set to 0x07 when it *could* be either
1858 * 0x07 or 0x80.
1859 *
1860 * Enable for TP-1Y (T43), TP-78 (R51e),
1861 * TP-76 (R52), TP-70 (T43, R52), which are known
1862 * to be buggy. */
1863 if (fan_control_initial_status == 0x07 &&
1864 ibm_thinkpad_ec_found &&
1865 ((ibm_thinkpad_ec_found[0] == '1' &&
1866 ibm_thinkpad_ec_found[1] == 'Y') ||
1867 (ibm_thinkpad_ec_found[0] == '7' &&
1868 (ibm_thinkpad_ec_found[1] == '6' ||
1869 ibm_thinkpad_ec_found[1] == '8' ||
1870 ibm_thinkpad_ec_found[1] == '0'))
1871 )) {
1872 printk(IBM_NOTICE
1873 "fan_init: initial fan status is "
1874 "unknown, assuming it is in auto "
1875 "mode\n");
1876 fan_control_status_known = 0;
1877 }
1878 } else {
1879 printk(IBM_ERR
1880 "ThinkPad ACPI EC access misbehaving, "
1881 "fan status and control unavailable\n");
1882 return 0;
1883 }
1884 }
1885
1886 if (sfan_handle) {
1887 /* 570, 770x-JL */
1888 fan_control_access_mode = IBMACPI_FAN_WR_ACPI_SFAN;
1889 fan_control_commands |=
1890 IBMACPI_FAN_CMD_LEVEL | IBMACPI_FAN_CMD_ENABLE;
1891 } else {
1892 if (!gfan_handle) {
1893 /* gfan without sfan means no fan control */
1894 /* all other models implement TP EC 0x2f control */
1895
1896 if (fans_handle) {
1897 /* X31, X40, X41 */
1898 fan_control_access_mode =
1899 IBMACPI_FAN_WR_ACPI_FANS;
1900 fan_control_commands |=
1901 IBMACPI_FAN_CMD_SPEED |
1902 IBMACPI_FAN_CMD_LEVEL |
1903 IBMACPI_FAN_CMD_ENABLE;
1904 } else {
1905 fan_control_access_mode = IBMACPI_FAN_WR_TPEC;
1906 fan_control_commands |=
1907 IBMACPI_FAN_CMD_LEVEL |
1908 IBMACPI_FAN_CMD_ENABLE;
1909 }
1910 }
1911 }
1912
1913 return 0;
1914 }
1915
1916 static int fan_get_status(u8 *status)
1917 {
1918 u8 s;
1919
1920 /* TODO:
1921 * Add IBMACPI_FAN_RD_ACPI_FANS ? */
1922
1923 switch (fan_status_access_mode) {
1924 case IBMACPI_FAN_RD_ACPI_GFAN:
1925 /* 570, 600e/x, 770e, 770x */
1926
1927 if (unlikely(!acpi_evalf(gfan_handle, &s, NULL, "d")))
1928 return -EIO;
1929
1930 if (likely(status))
1931 *status = s & 0x07;
1932
1933 break;
1934
1935 case IBMACPI_FAN_RD_TPEC:
1936 /* all except 570, 600e/x, 770e, 770x */
1937 if (unlikely(!acpi_ec_read(fan_status_offset, &s)))
1938 return -EIO;
1939
1940 if (likely(status))
1941 *status = s;
1942
1943 break;
1944
1945 default:
1946 return -ENXIO;
1947 }
1948
1949 return 0;
1950 }
1951
1952 static int fan_get_speed(unsigned int *speed)
1953 {
1954 u8 hi, lo;
1955
1956 switch (fan_status_access_mode) {
1957 case IBMACPI_FAN_RD_TPEC:
1958 /* all except 570, 600e/x, 770e, 770x */
1959 if (unlikely(!acpi_ec_read(fan_rpm_offset, &lo) ||
1960 !acpi_ec_read(fan_rpm_offset + 1, &hi)))
1961 return -EIO;
1962
1963 if (likely(speed))
1964 *speed = (hi << 8) | lo;
1965
1966 break;
1967
1968 default:
1969 return -ENXIO;
1970 }
1971
1972 return 0;
1973 }
1974
1975 static void fan_exit(void)
1976 {
1977 cancel_delayed_work(&fan_watchdog_task);
1978 flush_scheduled_work();
1979 }
1980
1981 static void fan_watchdog_reset(void)
1982 {
1983 static int fan_watchdog_active = 0;
1984
1985 if (fan_watchdog_active)
1986 cancel_delayed_work(&fan_watchdog_task);
1987
1988 if (fan_watchdog_maxinterval > 0) {
1989 fan_watchdog_active = 1;
1990 if (!schedule_delayed_work(&fan_watchdog_task,
1991 msecs_to_jiffies(fan_watchdog_maxinterval
1992 * 1000))) {
1993 printk(IBM_ERR "failed to schedule the fan watchdog, "
1994 "watchdog will not trigger\n");
1995 }
1996 } else
1997 fan_watchdog_active = 0;
1998 }
1999
2000 static int fan_read(char *p)
2001 {
2002 int len = 0;
2003 int rc;
2004 u8 status;
2005 unsigned int speed = 0;
2006
2007 switch (fan_status_access_mode) {
2008 case IBMACPI_FAN_RD_ACPI_GFAN:
2009 /* 570, 600e/x, 770e, 770x */
2010 if ((rc = fan_get_status(&status)) < 0)
2011 return rc;
2012
2013 len += sprintf(p + len, "status:\t\t%s\n"
2014 "level:\t\t%d\n",
2015 (status != 0) ? "enabled" : "disabled", status);
2016 break;
2017
2018 case IBMACPI_FAN_RD_TPEC:
2019 /* all except 570, 600e/x, 770e, 770x */
2020 if ((rc = fan_get_status(&status)) < 0)
2021 return rc;
2022
2023 if (unlikely(!fan_control_status_known)) {
2024 if (status != fan_control_initial_status)
2025 fan_control_status_known = 1;
2026 else
2027 /* Return most likely status. In fact, it
2028 * might be the only possible status */
2029 status = IBMACPI_FAN_EC_AUTO;
2030 }
2031
2032 len += sprintf(p + len, "status:\t\t%s\n",
2033 (status != 0) ? "enabled" : "disabled");
2034
2035 /* No ThinkPad boots on disengaged mode, we can safely
2036 * assume the tachometer is online if fan control status
2037 * was unknown */
2038 if ((rc = fan_get_speed(&speed)) < 0)
2039 return rc;
2040
2041 len += sprintf(p + len, "speed:\t\t%d\n", speed);
2042
2043 if (status & IBMACPI_FAN_EC_DISENGAGED)
2044 /* Disengaged mode takes precedence */
2045 len += sprintf(p + len, "level:\t\tdisengaged\n");
2046 else if (status & IBMACPI_FAN_EC_AUTO)
2047 len += sprintf(p + len, "level:\t\tauto\n");
2048 else
2049 len += sprintf(p + len, "level:\t\t%d\n", status);
2050 break;
2051
2052 case IBMACPI_FAN_NONE:
2053 default:
2054 len += sprintf(p + len, "status:\t\tnot supported\n");
2055 }
2056
2057 if (fan_control_commands & IBMACPI_FAN_CMD_LEVEL) {
2058 len += sprintf(p + len, "commands:\tlevel <level>");
2059
2060 switch (fan_control_access_mode) {
2061 case IBMACPI_FAN_WR_ACPI_SFAN:
2062 len += sprintf(p + len, " (<level> is 0-7)\n");
2063 break;
2064
2065 default:
2066 len += sprintf(p + len, " (<level> is 0-7, "
2067 "auto, disengaged)\n");
2068 break;
2069 }
2070 }
2071
2072 if (fan_control_commands & IBMACPI_FAN_CMD_ENABLE)
2073 len += sprintf(p + len, "commands:\tenable, disable\n"
2074 "commands:\twatchdog <timeout> (<timeout> is 0 (off), "
2075 "1-120 (seconds))\n");
2076
2077 if (fan_control_commands & IBMACPI_FAN_CMD_SPEED)
2078 len += sprintf(p + len, "commands:\tspeed <speed>"
2079 " (<speed> is 0-65535)\n");
2080
2081 return len;
2082 }
2083
2084 static int fan_set_level(int level)
2085 {
2086 switch (fan_control_access_mode) {
2087 case IBMACPI_FAN_WR_ACPI_SFAN:
2088 if (level >= 0 && level <= 7) {
2089 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", level))
2090 return -EIO;
2091 } else
2092 return -EINVAL;
2093 break;
2094
2095 case IBMACPI_FAN_WR_ACPI_FANS:
2096 case IBMACPI_FAN_WR_TPEC:
2097 if ((level != IBMACPI_FAN_EC_AUTO) &&
2098 (level != IBMACPI_FAN_EC_DISENGAGED) &&
2099 ((level < 0) || (level > 7)))
2100 return -EINVAL;
2101
2102 if (!acpi_ec_write(fan_status_offset, level))
2103 return -EIO;
2104 else
2105 fan_control_status_known = 1;
2106 break;
2107
2108 default:
2109 return -ENXIO;
2110 }
2111 return 0;
2112 }
2113
2114 static int fan_set_enable(void)
2115 {
2116 u8 s;
2117 int rc;
2118
2119 switch (fan_control_access_mode) {
2120 case IBMACPI_FAN_WR_ACPI_FANS:
2121 case IBMACPI_FAN_WR_TPEC:
2122 if ((rc = fan_get_status(&s)) < 0)
2123 return rc;
2124
2125 /* Don't go out of emergency fan mode */
2126 if (s != 7)
2127 s = IBMACPI_FAN_EC_AUTO;
2128
2129 if (!acpi_ec_write(fan_status_offset, s))
2130 return -EIO;
2131 else
2132 fan_control_status_known = 1;
2133 break;
2134
2135 case IBMACPI_FAN_WR_ACPI_SFAN:
2136 if ((rc = fan_get_status(&s)) < 0)
2137 return rc;
2138
2139 s &= 0x07;
2140
2141 /* Set fan to at least level 4 */
2142 if (s < 4)
2143 s = 4;
2144
2145 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", s))
2146 return -EIO;
2147 break;
2148
2149 default:
2150 return -ENXIO;
2151 }
2152 return 0;
2153 }
2154
2155 static int fan_set_disable(void)
2156 {
2157 switch (fan_control_access_mode) {
2158 case IBMACPI_FAN_WR_ACPI_FANS:
2159 case IBMACPI_FAN_WR_TPEC:
2160 if (!acpi_ec_write(fan_status_offset, 0x00))
2161 return -EIO;
2162 else
2163 fan_control_status_known = 1;
2164 break;
2165
2166 case IBMACPI_FAN_WR_ACPI_SFAN:
2167 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", 0x00))
2168 return -EIO;
2169 break;
2170
2171 default:
2172 return -ENXIO;
2173 }
2174 return 0;
2175 }
2176
2177 static int fan_set_speed(int speed)
2178 {
2179 switch (fan_control_access_mode) {
2180 case IBMACPI_FAN_WR_ACPI_FANS:
2181 if (speed >= 0 && speed <= 65535) {
2182 if (!acpi_evalf(fans_handle, NULL, NULL, "vddd",
2183 speed, speed, speed))
2184 return -EIO;
2185 } else
2186 return -EINVAL;
2187 break;
2188
2189 default:
2190 return -ENXIO;
2191 }
2192 return 0;
2193 }
2194
2195 static int fan_write_cmd_level(const char *cmd, int *rc)
2196 {
2197 int level;
2198
2199 if (strlencmp(cmd, "level auto") == 0)
2200 level = IBMACPI_FAN_EC_AUTO;
2201 else if (strlencmp(cmd, "level disengaged") == 0)
2202 level = IBMACPI_FAN_EC_DISENGAGED;
2203 else if (sscanf(cmd, "level %d", &level) != 1)
2204 return 0;
2205
2206 if ((*rc = fan_set_level(level)) == -ENXIO)
2207 printk(IBM_ERR "level command accepted for unsupported "
2208 "access mode %d", fan_control_access_mode);
2209
2210 return 1;
2211 }
2212
2213 static int fan_write_cmd_enable(const char *cmd, int *rc)
2214 {
2215 if (strlencmp(cmd, "enable") != 0)
2216 return 0;
2217
2218 if ((*rc = fan_set_enable()) == -ENXIO)
2219 printk(IBM_ERR "enable command accepted for unsupported "
2220 "access mode %d", fan_control_access_mode);
2221
2222 return 1;
2223 }
2224
2225 static int fan_write_cmd_disable(const char *cmd, int *rc)
2226 {
2227 if (strlencmp(cmd, "disable") != 0)
2228 return 0;
2229
2230 if ((*rc = fan_set_disable()) == -ENXIO)
2231 printk(IBM_ERR "disable command accepted for unsupported "
2232 "access mode %d", fan_control_access_mode);
2233
2234 return 1;
2235 }
2236
2237 static int fan_write_cmd_speed(const char *cmd, int *rc)
2238 {
2239 int speed;
2240
2241 /* TODO:
2242 * Support speed <low> <medium> <high> ? */
2243
2244 if (sscanf(cmd, "speed %d", &speed) != 1)
2245 return 0;
2246
2247 if ((*rc = fan_set_speed(speed)) == -ENXIO)
2248 printk(IBM_ERR "speed command accepted for unsupported "
2249 "access mode %d", fan_control_access_mode);
2250
2251 return 1;
2252 }
2253
2254 static int fan_write_cmd_watchdog(const char *cmd, int *rc)
2255 {
2256 int interval;
2257
2258 if (sscanf(cmd, "watchdog %d", &interval) != 1)
2259 return 0;
2260
2261 if (interval < 0 || interval > 120)
2262 *rc = -EINVAL;
2263 else
2264 fan_watchdog_maxinterval = interval;
2265
2266 return 1;
2267 }
2268
2269 static int fan_write(char *buf)
2270 {
2271 char *cmd;
2272 int rc = 0;
2273
2274 while (!rc && (cmd = next_cmd(&buf))) {
2275 if (!((fan_control_commands & IBMACPI_FAN_CMD_LEVEL) &&
2276 fan_write_cmd_level(cmd, &rc)) &&
2277 !((fan_control_commands & IBMACPI_FAN_CMD_ENABLE) &&
2278 (fan_write_cmd_enable(cmd, &rc) ||
2279 fan_write_cmd_disable(cmd, &rc) ||
2280 fan_write_cmd_watchdog(cmd, &rc))) &&
2281 !((fan_control_commands & IBMACPI_FAN_CMD_SPEED) &&
2282 fan_write_cmd_speed(cmd, &rc))
2283 )
2284 rc = -EINVAL;
2285 else if (!rc)
2286 fan_watchdog_reset();
2287 }
2288
2289 return rc;
2290 }
2291
2292 static void fan_watchdog_fire(struct work_struct *ignored)
2293 {
2294 printk(IBM_NOTICE "fan watchdog: enabling fan\n");
2295 if (fan_set_enable()) {
2296 printk(IBM_ERR "fan watchdog: error while enabling fan\n");
2297 /* reschedule for later */
2298 fan_watchdog_reset();
2299 }
2300 }
2301
2302 static struct ibm_struct ibms[] = {
2303 {
2304 .name = "driver",
2305 .init = ibm_acpi_driver_init,
2306 .read = driver_read,
2307 },
2308 {
2309 .name = "hotkey",
2310 .hid = IBM_HKEY_HID,
2311 .init = hotkey_init,
2312 .read = hotkey_read,
2313 .write = hotkey_write,
2314 .exit = hotkey_exit,
2315 .notify = hotkey_notify,
2316 .handle = &hkey_handle,
2317 .type = ACPI_DEVICE_NOTIFY,
2318 },
2319 {
2320 .name = "bluetooth",
2321 .init = bluetooth_init,
2322 .read = bluetooth_read,
2323 .write = bluetooth_write,
2324 },
2325 {
2326 .name = "wan",
2327 .init = wan_init,
2328 .read = wan_read,
2329 .write = wan_write,
2330 .experimental = 1,
2331 },
2332 {
2333 .name = "video",
2334 .init = video_init,
2335 .read = video_read,
2336 .write = video_write,
2337 .exit = video_exit,
2338 },
2339 {
2340 .name = "light",
2341 .init = light_init,
2342 .read = light_read,
2343 .write = light_write,
2344 },
2345 #ifdef CONFIG_ACPI_IBM_DOCK
2346 {
2347 .name = "dock",
2348 .read = dock_read,
2349 .write = dock_write,
2350 .notify = dock_notify,
2351 .handle = &dock_handle,
2352 .type = ACPI_SYSTEM_NOTIFY,
2353 },
2354 {
2355 .name = "dock",
2356 .hid = IBM_PCI_HID,
2357 .notify = dock_notify,
2358 .handle = &pci_handle,
2359 .type = ACPI_SYSTEM_NOTIFY,
2360 },
2361 #endif
2362 #ifdef CONFIG_ACPI_IBM_BAY
2363 {
2364 .name = "bay",
2365 .init = bay_init,
2366 .read = bay_read,
2367 .write = bay_write,
2368 .notify = bay_notify,
2369 .handle = &bay_handle,
2370 .type = ACPI_SYSTEM_NOTIFY,
2371 },
2372 #endif /* CONFIG_ACPI_IBM_BAY */
2373 {
2374 .name = "cmos",
2375 .read = cmos_read,
2376 .write = cmos_write,
2377 },
2378 {
2379 .name = "led",
2380 .init = led_init,
2381 .read = led_read,
2382 .write = led_write,
2383 },
2384 {
2385 .name = "beep",
2386 .read = beep_read,
2387 .write = beep_write,
2388 },
2389 {
2390 .name = "thermal",
2391 .init = thermal_init,
2392 .read = thermal_read,
2393 },
2394 {
2395 .name = "ecdump",
2396 .read = ecdump_read,
2397 .write = ecdump_write,
2398 .experimental = 1,
2399 },
2400 {
2401 .name = "brightness",
2402 .read = brightness_read,
2403 .write = brightness_write,
2404 .init = brightness_init,
2405 .exit = brightness_exit,
2406 },
2407 {
2408 .name = "volume",
2409 .read = volume_read,
2410 .write = volume_write,
2411 },
2412 {
2413 .name = "fan",
2414 .read = fan_read,
2415 .write = fan_write,
2416 .init = fan_init,
2417 .exit = fan_exit,
2418 .experimental = 1,
2419 },
2420 };
2421
2422 static int dispatch_read(char *page, char **start, off_t off, int count,
2423 int *eof, void *data)
2424 {
2425 struct ibm_struct *ibm = data;
2426 int len;
2427
2428 if (!ibm || !ibm->read)
2429 return -EINVAL;
2430
2431 len = ibm->read(page);
2432 if (len < 0)
2433 return len;
2434
2435 if (len <= off + count)
2436 *eof = 1;
2437 *start = page + off;
2438 len -= off;
2439 if (len > count)
2440 len = count;
2441 if (len < 0)
2442 len = 0;
2443
2444 return len;
2445 }
2446
2447 static int dispatch_write(struct file *file, const char __user * userbuf,
2448 unsigned long count, void *data)
2449 {
2450 struct ibm_struct *ibm = data;
2451 char *kernbuf;
2452 int ret;
2453
2454 if (!ibm || !ibm->write)
2455 return -EINVAL;
2456
2457 kernbuf = kmalloc(count + 2, GFP_KERNEL);
2458 if (!kernbuf)
2459 return -ENOMEM;
2460
2461 if (copy_from_user(kernbuf, userbuf, count)) {
2462 kfree(kernbuf);
2463 return -EFAULT;
2464 }
2465
2466 kernbuf[count] = 0;
2467 strcat(kernbuf, ",");
2468 ret = ibm->write(kernbuf);
2469 if (ret == 0)
2470 ret = count;
2471
2472 kfree(kernbuf);
2473
2474 return ret;
2475 }
2476
2477 static void dispatch_notify(acpi_handle handle, u32 event, void *data)
2478 {
2479 struct ibm_struct *ibm = data;
2480
2481 if (!ibm || !ibm->notify)
2482 return;
2483
2484 ibm->notify(ibm, event);
2485 }
2486
2487 static int __init setup_notify(struct ibm_struct *ibm)
2488 {
2489 acpi_status status;
2490 int ret;
2491
2492 if (!*ibm->handle)
2493 return 0;
2494
2495 ret = acpi_bus_get_device(*ibm->handle, &ibm->device);
2496 if (ret < 0) {
2497 printk(IBM_ERR "%s device not present\n", ibm->name);
2498 return 0;
2499 }
2500
2501 acpi_driver_data(ibm->device) = ibm;
2502 sprintf(acpi_device_class(ibm->device), "%s/%s", IBM_NAME, ibm->name);
2503
2504 status = acpi_install_notify_handler(*ibm->handle, ibm->type,
2505 dispatch_notify, ibm);
2506 if (ACPI_FAILURE(status)) {
2507 printk(IBM_ERR "acpi_install_notify_handler(%s) failed: %d\n",
2508 ibm->name, status);
2509 return -ENODEV;
2510 }
2511 ibm->notify_installed = 1;
2512 return 0;
2513 }
2514
2515 static int __init ibm_device_add(struct acpi_device *device)
2516 {
2517 return 0;
2518 }
2519
2520 static int __init register_driver(struct ibm_struct *ibm)
2521 {
2522 int ret;
2523
2524 ibm->driver = kzalloc(sizeof(struct acpi_driver), GFP_KERNEL);
2525 if (!ibm->driver) {
2526 printk(IBM_ERR "kmalloc(ibm->driver) failed\n");
2527 return -1;
2528 }
2529
2530 sprintf(ibm->driver->name, "%s_%s", IBM_NAME, ibm->name);
2531 ibm->driver->ids = ibm->hid;
2532 ibm->driver->ops.add = &ibm_device_add;
2533
2534 ret = acpi_bus_register_driver(ibm->driver);
2535 if (ret < 0) {
2536 printk(IBM_ERR "acpi_bus_register_driver(%s) failed: %d\n",
2537 ibm->hid, ret);
2538 kfree(ibm->driver);
2539 }
2540
2541 return ret;
2542 }
2543
2544 static int __init ibm_init(struct ibm_struct *ibm)
2545 {
2546 int ret;
2547 struct proc_dir_entry *entry;
2548
2549 if (ibm->experimental && !experimental)
2550 return 0;
2551
2552 if (ibm->hid) {
2553 ret = register_driver(ibm);
2554 if (ret < 0)
2555 return ret;
2556 ibm->driver_registered = 1;
2557 }
2558
2559 if (ibm->init) {
2560 ret = ibm->init();
2561 if (ret != 0)
2562 return ret;
2563 ibm->init_called = 1;
2564 }
2565
2566 if (ibm->read) {
2567 entry = create_proc_entry(ibm->name,
2568 S_IFREG | S_IRUGO | S_IWUSR,
2569 proc_dir);
2570 if (!entry) {
2571 printk(IBM_ERR "unable to create proc entry %s\n",
2572 ibm->name);
2573 return -ENODEV;
2574 }
2575 entry->owner = THIS_MODULE;
2576 entry->data = ibm;
2577 entry->read_proc = &dispatch_read;
2578 if (ibm->write)
2579 entry->write_proc = &dispatch_write;
2580 ibm->proc_created = 1;
2581 }
2582
2583 if (ibm->notify) {
2584 ret = setup_notify(ibm);
2585 if (ret < 0)
2586 return ret;
2587 }
2588
2589 return 0;
2590 }
2591
2592 static void ibm_exit(struct ibm_struct *ibm)
2593 {
2594 if (ibm->notify_installed)
2595 acpi_remove_notify_handler(*ibm->handle, ibm->type,
2596 dispatch_notify);
2597
2598 if (ibm->proc_created)
2599 remove_proc_entry(ibm->name, proc_dir);
2600
2601 if (ibm->init_called && ibm->exit)
2602 ibm->exit();
2603
2604 if (ibm->driver_registered) {
2605 acpi_bus_unregister_driver(ibm->driver);
2606 kfree(ibm->driver);
2607 }
2608 }
2609
2610 static void __init ibm_handle_init(char *name,
2611 acpi_handle * handle, acpi_handle parent,
2612 char **paths, int num_paths, char **path)
2613 {
2614 int i;
2615 acpi_status status;
2616
2617 for (i = 0; i < num_paths; i++) {
2618 status = acpi_get_handle(parent, paths[i], handle);
2619 if (ACPI_SUCCESS(status)) {
2620 *path = paths[i];
2621 return;
2622 }
2623 }
2624
2625 *handle = NULL;
2626 }
2627
2628 #define IBM_HANDLE_INIT(object) \
2629 ibm_handle_init(#object, &object##_handle, *object##_parent, \
2630 object##_paths, ARRAY_SIZE(object##_paths), &object##_path)
2631
2632 static int __init set_ibm_param(const char *val, struct kernel_param *kp)
2633 {
2634 unsigned int i;
2635
2636 for (i = 0; i < ARRAY_SIZE(ibms); i++)
2637 if (strcmp(ibms[i].name, kp->name) == 0 && ibms[i].write) {
2638 if (strlen(val) > sizeof(ibms[i].param) - 2)
2639 return -ENOSPC;
2640 strcpy(ibms[i].param, val);
2641 strcat(ibms[i].param, ",");
2642 return 0;
2643 }
2644
2645 return -EINVAL;
2646 }
2647
2648 #define IBM_PARAM(feature) \
2649 module_param_call(feature, set_ibm_param, NULL, NULL, 0)
2650
2651 IBM_PARAM(hotkey);
2652 IBM_PARAM(bluetooth);
2653 IBM_PARAM(video);
2654 IBM_PARAM(light);
2655 #ifdef CONFIG_ACPI_IBM_DOCK
2656 IBM_PARAM(dock);
2657 #endif
2658 #ifdef CONFIG_ACPI_IBM_BAY
2659 IBM_PARAM(bay);
2660 #endif /* CONFIG_ACPI_IBM_BAY */
2661 IBM_PARAM(cmos);
2662 IBM_PARAM(led);
2663 IBM_PARAM(beep);
2664 IBM_PARAM(ecdump);
2665 IBM_PARAM(brightness);
2666 IBM_PARAM(volume);
2667 IBM_PARAM(fan);
2668
2669 static void acpi_ibm_exit(void)
2670 {
2671 int i;
2672
2673 for (i = ARRAY_SIZE(ibms) - 1; i >= 0; i--)
2674 ibm_exit(&ibms[i]);
2675
2676 if (proc_dir)
2677 remove_proc_entry(IBM_DIR, acpi_root_dir);
2678
2679 if (ibm_thinkpad_ec_found)
2680 kfree(ibm_thinkpad_ec_found);
2681 }
2682
2683 static char* __init check_dmi_for_ec(void)
2684 {
2685 struct dmi_device *dev = NULL;
2686 char ec_fw_string[18];
2687
2688 /*
2689 * ThinkPad T23 or newer, A31 or newer, R50e or newer,
2690 * X32 or newer, all Z series; Some models must have an
2691 * up-to-date BIOS or they will not be detected.
2692 *
2693 * See http://thinkwiki.org/wiki/List_of_DMI_IDs
2694 */
2695 while ((dev = dmi_find_device(DMI_DEV_TYPE_OEM_STRING, NULL, dev))) {
2696 if (sscanf(dev->name,
2697 "IBM ThinkPad Embedded Controller -[%17c",
2698 ec_fw_string) == 1) {
2699 ec_fw_string[sizeof(ec_fw_string) - 1] = 0;
2700 ec_fw_string[strcspn(ec_fw_string, " ]")] = 0;
2701 return kstrdup(ec_fw_string, GFP_KERNEL);
2702 }
2703 }
2704 return NULL;
2705 }
2706
2707 static int __init acpi_ibm_init(void)
2708 {
2709 int ret, i;
2710
2711 if (acpi_disabled)
2712 return -ENODEV;
2713
2714 if (!acpi_specific_hotkey_enabled) {
2715 printk(IBM_ERR "using generic hotkey driver\n");
2716 return -ENODEV;
2717 }
2718
2719 /* ec is required because many other handles are relative to it */
2720 IBM_HANDLE_INIT(ec);
2721 if (!ec_handle) {
2722 printk(IBM_ERR "ec object not found\n");
2723 return -ENODEV;
2724 }
2725
2726 /* Models with newer firmware report the EC in DMI */
2727 ibm_thinkpad_ec_found = check_dmi_for_ec();
2728
2729 /* these handles are not required */
2730 IBM_HANDLE_INIT(vid);
2731 IBM_HANDLE_INIT(vid2);
2732 IBM_HANDLE_INIT(ledb);
2733 IBM_HANDLE_INIT(led);
2734 IBM_HANDLE_INIT(hkey);
2735 IBM_HANDLE_INIT(lght);
2736 IBM_HANDLE_INIT(cmos);
2737 #ifdef CONFIG_ACPI_IBM_DOCK
2738 IBM_HANDLE_INIT(dock);
2739 #endif
2740 IBM_HANDLE_INIT(pci);
2741 #ifdef CONFIG_ACPI_IBM_BAY
2742 IBM_HANDLE_INIT(bay);
2743 if (bay_handle)
2744 IBM_HANDLE_INIT(bay_ej);
2745 IBM_HANDLE_INIT(bay2);
2746 if (bay2_handle)
2747 IBM_HANDLE_INIT(bay2_ej);
2748 #endif /* CONFIG_ACPI_IBM_BAY */
2749 IBM_HANDLE_INIT(beep);
2750 IBM_HANDLE_INIT(ecrd);
2751 IBM_HANDLE_INIT(ecwr);
2752 IBM_HANDLE_INIT(fans);
2753 IBM_HANDLE_INIT(gfan);
2754 IBM_HANDLE_INIT(sfan);
2755
2756 proc_dir = proc_mkdir(IBM_DIR, acpi_root_dir);
2757 if (!proc_dir) {
2758 printk(IBM_ERR "unable to create proc dir %s", IBM_DIR);
2759 acpi_ibm_exit();
2760 return -ENODEV;
2761 }
2762 proc_dir->owner = THIS_MODULE;
2763
2764 for (i = 0; i < ARRAY_SIZE(ibms); i++) {
2765 ret = ibm_init(&ibms[i]);
2766 if (ret >= 0 && *ibms[i].param)
2767 ret = ibms[i].write(ibms[i].param);
2768 if (ret < 0) {
2769 acpi_ibm_exit();
2770 return ret;
2771 }
2772 }
2773
2774 return 0;
2775 }
2776
2777 module_init(acpi_ibm_init);
2778 module_exit(acpi_ibm_exit);
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree