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ACPI: ibm-acpi: cleanup init and exit paths
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / acpi / ibm_acpi.c
blob2429e1180fa9aa09141c6d3abbc9023700d94973
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 .owner = THIS_MODULE,
1709 .get_brightness = brightness_get,
1710 .update_status = brightness_update_status,
1711 .max_brightness = 7,
1712 };
1713
1714 static int brightness_init(void)
1715 {
1716 ibm_backlight_device = backlight_device_register("ibm", NULL, NULL,
1717 &ibm_backlight_data);
1718 if (IS_ERR(ibm_backlight_device)) {
1719 printk(IBM_ERR "Could not register backlight device\n");
1720 return PTR_ERR(ibm_backlight_device);
1721 }
1722
1723 return 0;
1724 }
1725
1726 static void brightness_exit(void)
1727 {
1728 if (ibm_backlight_device) {
1729 backlight_device_unregister(ibm_backlight_device);
1730 ibm_backlight_device = NULL;
1731 }
1732 }
1733
1734 static int volume_offset = 0x30;
1735
1736 static int volume_read(char *p)
1737 {
1738 int len = 0;
1739 u8 level;
1740
1741 if (!acpi_ec_read(volume_offset, &level)) {
1742 len += sprintf(p + len, "level:\t\tunreadable\n");
1743 } else {
1744 len += sprintf(p + len, "level:\t\t%d\n", level & 0xf);
1745 len += sprintf(p + len, "mute:\t\t%s\n", onoff(level, 6));
1746 len += sprintf(p + len, "commands:\tup, down, mute\n");
1747 len += sprintf(p + len, "commands:\tlevel <level>"
1748 " (<level> is 0-15)\n");
1749 }
1750
1751 return len;
1752 }
1753
1754 #define VOLUME_DOWN 0
1755 #define VOLUME_UP 1
1756 #define VOLUME_MUTE 2
1757
1758 static int volume_write(char *buf)
1759 {
1760 int cmos_cmd, inc, i;
1761 u8 level, mute;
1762 int new_level, new_mute;
1763 char *cmd;
1764
1765 while ((cmd = next_cmd(&buf))) {
1766 if (!acpi_ec_read(volume_offset, &level))
1767 return -EIO;
1768 new_mute = mute = level & 0x40;
1769 new_level = level = level & 0xf;
1770
1771 if (strlencmp(cmd, "up") == 0) {
1772 if (mute)
1773 new_mute = 0;
1774 else
1775 new_level = level == 15 ? 15 : level + 1;
1776 } else if (strlencmp(cmd, "down") == 0) {
1777 if (mute)
1778 new_mute = 0;
1779 else
1780 new_level = level == 0 ? 0 : level - 1;
1781 } else if (sscanf(cmd, "level %d", &new_level) == 1 &&
1782 new_level >= 0 && new_level <= 15) {
1783 /* new_level set */
1784 } else if (strlencmp(cmd, "mute") == 0) {
1785 new_mute = 0x40;
1786 } else
1787 return -EINVAL;
1788
1789 if (new_level != level) { /* mute doesn't change */
1790 cmos_cmd = new_level > level ? VOLUME_UP : VOLUME_DOWN;
1791 inc = new_level > level ? 1 : -1;
1792
1793 if (mute && (!cmos_eval(cmos_cmd) ||
1794 !acpi_ec_write(volume_offset, level)))
1795 return -EIO;
1796
1797 for (i = level; i != new_level; i += inc)
1798 if (!cmos_eval(cmos_cmd) ||
1799 !acpi_ec_write(volume_offset, i + inc))
1800 return -EIO;
1801
1802 if (mute && (!cmos_eval(VOLUME_MUTE) ||
1803 !acpi_ec_write(volume_offset,
1804 new_level + mute)))
1805 return -EIO;
1806 }
1807
1808 if (new_mute != mute) { /* level doesn't change */
1809 cmos_cmd = new_mute ? VOLUME_MUTE : VOLUME_UP;
1810
1811 if (!cmos_eval(cmos_cmd) ||
1812 !acpi_ec_write(volume_offset, level + new_mute))
1813 return -EIO;
1814 }
1815 }
1816
1817 return 0;
1818 }
1819
1820 static enum fan_status_access_mode fan_status_access_mode;
1821 static enum fan_control_access_mode fan_control_access_mode;
1822 static enum fan_control_commands fan_control_commands;
1823
1824 static int fan_control_status_known;
1825 static u8 fan_control_initial_status;
1826
1827 static void fan_watchdog_fire(struct work_struct *ignored);
1828 static int fan_watchdog_maxinterval;
1829 static DECLARE_DELAYED_WORK(fan_watchdog_task, fan_watchdog_fire);
1830
1831 static int fan_init(void)
1832 {
1833 fan_status_access_mode = IBMACPI_FAN_NONE;
1834 fan_control_access_mode = IBMACPI_FAN_WR_NONE;
1835 fan_control_commands = 0;
1836 fan_control_status_known = 1;
1837 fan_watchdog_maxinterval = 0;
1838
1839 if (gfan_handle) {
1840 /* 570, 600e/x, 770e, 770x */
1841 fan_status_access_mode = IBMACPI_FAN_RD_ACPI_GFAN;
1842 } else {
1843 /* all other ThinkPads: note that even old-style
1844 * ThinkPad ECs supports the fan control register */
1845 if (likely(acpi_ec_read(fan_status_offset,
1846 &fan_control_initial_status))) {
1847 fan_status_access_mode = IBMACPI_FAN_RD_TPEC;
1848
1849 /* In some ThinkPads, neither the EC nor the ACPI
1850 * DSDT initialize the fan status, and it ends up
1851 * being set to 0x07 when it *could* be either
1852 * 0x07 or 0x80.
1853 *
1854 * Enable for TP-1Y (T43), TP-78 (R51e),
1855 * TP-76 (R52), TP-70 (T43, R52), which are known
1856 * to be buggy. */
1857 if (fan_control_initial_status == 0x07 &&
1858 ibm_thinkpad_ec_found &&
1859 ((ibm_thinkpad_ec_found[0] == '1' &&
1860 ibm_thinkpad_ec_found[1] == 'Y') ||
1861 (ibm_thinkpad_ec_found[0] == '7' &&
1862 (ibm_thinkpad_ec_found[1] == '6' ||
1863 ibm_thinkpad_ec_found[1] == '8' ||
1864 ibm_thinkpad_ec_found[1] == '0'))
1865 )) {
1866 printk(IBM_NOTICE
1867 "fan_init: initial fan status is "
1868 "unknown, assuming it is in auto "
1869 "mode\n");
1870 fan_control_status_known = 0;
1871 }
1872 } else {
1873 printk(IBM_ERR
1874 "ThinkPad ACPI EC access misbehaving, "
1875 "fan status and control unavailable\n");
1876 return 0;
1877 }
1878 }
1879
1880 if (sfan_handle) {
1881 /* 570, 770x-JL */
1882 fan_control_access_mode = IBMACPI_FAN_WR_ACPI_SFAN;
1883 fan_control_commands |=
1884 IBMACPI_FAN_CMD_LEVEL | IBMACPI_FAN_CMD_ENABLE;
1885 } else {
1886 if (!gfan_handle) {
1887 /* gfan without sfan means no fan control */
1888 /* all other models implement TP EC 0x2f control */
1889
1890 if (fans_handle) {
1891 /* X31, X40, X41 */
1892 fan_control_access_mode =
1893 IBMACPI_FAN_WR_ACPI_FANS;
1894 fan_control_commands |=
1895 IBMACPI_FAN_CMD_SPEED |
1896 IBMACPI_FAN_CMD_LEVEL |
1897 IBMACPI_FAN_CMD_ENABLE;
1898 } else {
1899 fan_control_access_mode = IBMACPI_FAN_WR_TPEC;
1900 fan_control_commands |=
1901 IBMACPI_FAN_CMD_LEVEL |
1902 IBMACPI_FAN_CMD_ENABLE;
1903 }
1904 }
1905 }
1906
1907 return 0;
1908 }
1909
1910 static int fan_get_status(u8 *status)
1911 {
1912 u8 s;
1913
1914 /* TODO:
1915 * Add IBMACPI_FAN_RD_ACPI_FANS ? */
1916
1917 switch (fan_status_access_mode) {
1918 case IBMACPI_FAN_RD_ACPI_GFAN:
1919 /* 570, 600e/x, 770e, 770x */
1920
1921 if (unlikely(!acpi_evalf(gfan_handle, &s, NULL, "d")))
1922 return -EIO;
1923
1924 if (likely(status))
1925 *status = s & 0x07;
1926
1927 break;
1928
1929 case IBMACPI_FAN_RD_TPEC:
1930 /* all except 570, 600e/x, 770e, 770x */
1931 if (unlikely(!acpi_ec_read(fan_status_offset, &s)))
1932 return -EIO;
1933
1934 if (likely(status))
1935 *status = s;
1936
1937 break;
1938
1939 default:
1940 return -ENXIO;
1941 }
1942
1943 return 0;
1944 }
1945
1946 static int fan_get_speed(unsigned int *speed)
1947 {
1948 u8 hi, lo;
1949
1950 switch (fan_status_access_mode) {
1951 case IBMACPI_FAN_RD_TPEC:
1952 /* all except 570, 600e/x, 770e, 770x */
1953 if (unlikely(!acpi_ec_read(fan_rpm_offset, &lo) ||
1954 !acpi_ec_read(fan_rpm_offset + 1, &hi)))
1955 return -EIO;
1956
1957 if (likely(speed))
1958 *speed = (hi << 8) | lo;
1959
1960 break;
1961
1962 default:
1963 return -ENXIO;
1964 }
1965
1966 return 0;
1967 }
1968
1969 static void fan_exit(void)
1970 {
1971 cancel_delayed_work(&fan_watchdog_task);
1972 flush_scheduled_work();
1973 }
1974
1975 static void fan_watchdog_reset(void)
1976 {
1977 static int fan_watchdog_active = 0;
1978
1979 if (fan_watchdog_active)
1980 cancel_delayed_work(&fan_watchdog_task);
1981
1982 if (fan_watchdog_maxinterval > 0) {
1983 fan_watchdog_active = 1;
1984 if (!schedule_delayed_work(&fan_watchdog_task,
1985 msecs_to_jiffies(fan_watchdog_maxinterval
1986 * 1000))) {
1987 printk(IBM_ERR "failed to schedule the fan watchdog, "
1988 "watchdog will not trigger\n");
1989 }
1990 } else
1991 fan_watchdog_active = 0;
1992 }
1993
1994 static int fan_read(char *p)
1995 {
1996 int len = 0;
1997 int rc;
1998 u8 status;
1999 unsigned int speed = 0;
2000
2001 switch (fan_status_access_mode) {
2002 case IBMACPI_FAN_RD_ACPI_GFAN:
2003 /* 570, 600e/x, 770e, 770x */
2004 if ((rc = fan_get_status(&status)) < 0)
2005 return rc;
2006
2007 len += sprintf(p + len, "status:\t\t%s\n"
2008 "level:\t\t%d\n",
2009 (status != 0) ? "enabled" : "disabled", status);
2010 break;
2011
2012 case IBMACPI_FAN_RD_TPEC:
2013 /* all except 570, 600e/x, 770e, 770x */
2014 if ((rc = fan_get_status(&status)) < 0)
2015 return rc;
2016
2017 if (unlikely(!fan_control_status_known)) {
2018 if (status != fan_control_initial_status)
2019 fan_control_status_known = 1;
2020 else
2021 /* Return most likely status. In fact, it
2022 * might be the only possible status */
2023 status = IBMACPI_FAN_EC_AUTO;
2024 }
2025
2026 len += sprintf(p + len, "status:\t\t%s\n",
2027 (status != 0) ? "enabled" : "disabled");
2028
2029 /* No ThinkPad boots on disengaged mode, we can safely
2030 * assume the tachometer is online if fan control status
2031 * was unknown */
2032 if ((rc = fan_get_speed(&speed)) < 0)
2033 return rc;
2034
2035 len += sprintf(p + len, "speed:\t\t%d\n", speed);
2036
2037 if (status & IBMACPI_FAN_EC_DISENGAGED)
2038 /* Disengaged mode takes precedence */
2039 len += sprintf(p + len, "level:\t\tdisengaged\n");
2040 else if (status & IBMACPI_FAN_EC_AUTO)
2041 len += sprintf(p + len, "level:\t\tauto\n");
2042 else
2043 len += sprintf(p + len, "level:\t\t%d\n", status);
2044 break;
2045
2046 case IBMACPI_FAN_NONE:
2047 default:
2048 len += sprintf(p + len, "status:\t\tnot supported\n");
2049 }
2050
2051 if (fan_control_commands & IBMACPI_FAN_CMD_LEVEL) {
2052 len += sprintf(p + len, "commands:\tlevel <level>");
2053
2054 switch (fan_control_access_mode) {
2055 case IBMACPI_FAN_WR_ACPI_SFAN:
2056 len += sprintf(p + len, " (<level> is 0-7)\n");
2057 break;
2058
2059 default:
2060 len += sprintf(p + len, " (<level> is 0-7, "
2061 "auto, disengaged)\n");
2062 break;
2063 }
2064 }
2065
2066 if (fan_control_commands & IBMACPI_FAN_CMD_ENABLE)
2067 len += sprintf(p + len, "commands:\tenable, disable\n"
2068 "commands:\twatchdog <timeout> (<timeout> is 0 (off), "
2069 "1-120 (seconds))\n");
2070
2071 if (fan_control_commands & IBMACPI_FAN_CMD_SPEED)
2072 len += sprintf(p + len, "commands:\tspeed <speed>"
2073 " (<speed> is 0-65535)\n");
2074
2075 return len;
2076 }
2077
2078 static int fan_set_level(int level)
2079 {
2080 switch (fan_control_access_mode) {
2081 case IBMACPI_FAN_WR_ACPI_SFAN:
2082 if (level >= 0 && level <= 7) {
2083 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", level))
2084 return -EIO;
2085 } else
2086 return -EINVAL;
2087 break;
2088
2089 case IBMACPI_FAN_WR_ACPI_FANS:
2090 case IBMACPI_FAN_WR_TPEC:
2091 if ((level != IBMACPI_FAN_EC_AUTO) &&
2092 (level != IBMACPI_FAN_EC_DISENGAGED) &&
2093 ((level < 0) || (level > 7)))
2094 return -EINVAL;
2095
2096 if (!acpi_ec_write(fan_status_offset, level))
2097 return -EIO;
2098 else
2099 fan_control_status_known = 1;
2100 break;
2101
2102 default:
2103 return -ENXIO;
2104 }
2105 return 0;
2106 }
2107
2108 static int fan_set_enable(void)
2109 {
2110 u8 s;
2111 int rc;
2112
2113 switch (fan_control_access_mode) {
2114 case IBMACPI_FAN_WR_ACPI_FANS:
2115 case IBMACPI_FAN_WR_TPEC:
2116 if ((rc = fan_get_status(&s)) < 0)
2117 return rc;
2118
2119 /* Don't go out of emergency fan mode */
2120 if (s != 7)
2121 s = IBMACPI_FAN_EC_AUTO;
2122
2123 if (!acpi_ec_write(fan_status_offset, s))
2124 return -EIO;
2125 else
2126 fan_control_status_known = 1;
2127 break;
2128
2129 case IBMACPI_FAN_WR_ACPI_SFAN:
2130 if ((rc = fan_get_status(&s)) < 0)
2131 return rc;
2132
2133 s &= 0x07;
2134
2135 /* Set fan to at least level 4 */
2136 if (s < 4)
2137 s = 4;
2138
2139 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", s))
2140 return -EIO;
2141 break;
2142
2143 default:
2144 return -ENXIO;
2145 }
2146 return 0;
2147 }
2148
2149 static int fan_set_disable(void)
2150 {
2151 switch (fan_control_access_mode) {
2152 case IBMACPI_FAN_WR_ACPI_FANS:
2153 case IBMACPI_FAN_WR_TPEC:
2154 if (!acpi_ec_write(fan_status_offset, 0x00))
2155 return -EIO;
2156 else
2157 fan_control_status_known = 1;
2158 break;
2159
2160 case IBMACPI_FAN_WR_ACPI_SFAN:
2161 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", 0x00))
2162 return -EIO;
2163 break;
2164
2165 default:
2166 return -ENXIO;
2167 }
2168 return 0;
2169 }
2170
2171 static int fan_set_speed(int speed)
2172 {
2173 switch (fan_control_access_mode) {
2174 case IBMACPI_FAN_WR_ACPI_FANS:
2175 if (speed >= 0 && speed <= 65535) {
2176 if (!acpi_evalf(fans_handle, NULL, NULL, "vddd",
2177 speed, speed, speed))
2178 return -EIO;
2179 } else
2180 return -EINVAL;
2181 break;
2182
2183 default:
2184 return -ENXIO;
2185 }
2186 return 0;
2187 }
2188
2189 static int fan_write_cmd_level(const char *cmd, int *rc)
2190 {
2191 int level;
2192
2193 if (strlencmp(cmd, "level auto") == 0)
2194 level = IBMACPI_FAN_EC_AUTO;
2195 else if (strlencmp(cmd, "level disengaged") == 0)
2196 level = IBMACPI_FAN_EC_DISENGAGED;
2197 else if (sscanf(cmd, "level %d", &level) != 1)
2198 return 0;
2199
2200 if ((*rc = fan_set_level(level)) == -ENXIO)
2201 printk(IBM_ERR "level command accepted for unsupported "
2202 "access mode %d", fan_control_access_mode);
2203
2204 return 1;
2205 }
2206
2207 static int fan_write_cmd_enable(const char *cmd, int *rc)
2208 {
2209 if (strlencmp(cmd, "enable") != 0)
2210 return 0;
2211
2212 if ((*rc = fan_set_enable()) == -ENXIO)
2213 printk(IBM_ERR "enable command accepted for unsupported "
2214 "access mode %d", fan_control_access_mode);
2215
2216 return 1;
2217 }
2218
2219 static int fan_write_cmd_disable(const char *cmd, int *rc)
2220 {
2221 if (strlencmp(cmd, "disable") != 0)
2222 return 0;
2223
2224 if ((*rc = fan_set_disable()) == -ENXIO)
2225 printk(IBM_ERR "disable command accepted for unsupported "
2226 "access mode %d", fan_control_access_mode);
2227
2228 return 1;
2229 }
2230
2231 static int fan_write_cmd_speed(const char *cmd, int *rc)
2232 {
2233 int speed;
2234
2235 /* TODO:
2236 * Support speed <low> <medium> <high> ? */
2237
2238 if (sscanf(cmd, "speed %d", &speed) != 1)
2239 return 0;
2240
2241 if ((*rc = fan_set_speed(speed)) == -ENXIO)
2242 printk(IBM_ERR "speed command accepted for unsupported "
2243 "access mode %d", fan_control_access_mode);
2244
2245 return 1;
2246 }
2247
2248 static int fan_write_cmd_watchdog(const char *cmd, int *rc)
2249 {
2250 int interval;
2251
2252 if (sscanf(cmd, "watchdog %d", &interval) != 1)
2253 return 0;
2254
2255 if (interval < 0 || interval > 120)
2256 *rc = -EINVAL;
2257 else
2258 fan_watchdog_maxinterval = interval;
2259
2260 return 1;
2261 }
2262
2263 static int fan_write(char *buf)
2264 {
2265 char *cmd;
2266 int rc = 0;
2267
2268 while (!rc && (cmd = next_cmd(&buf))) {
2269 if (!((fan_control_commands & IBMACPI_FAN_CMD_LEVEL) &&
2270 fan_write_cmd_level(cmd, &rc)) &&
2271 !((fan_control_commands & IBMACPI_FAN_CMD_ENABLE) &&
2272 (fan_write_cmd_enable(cmd, &rc) ||
2273 fan_write_cmd_disable(cmd, &rc) ||
2274 fan_write_cmd_watchdog(cmd, &rc))) &&
2275 !((fan_control_commands & IBMACPI_FAN_CMD_SPEED) &&
2276 fan_write_cmd_speed(cmd, &rc))
2277 )
2278 rc = -EINVAL;
2279 else if (!rc)
2280 fan_watchdog_reset();
2281 }
2282
2283 return rc;
2284 }
2285
2286 static void fan_watchdog_fire(struct work_struct *ignored)
2287 {
2288 printk(IBM_NOTICE "fan watchdog: enabling fan\n");
2289 if (fan_set_enable()) {
2290 printk(IBM_ERR "fan watchdog: error while enabling fan\n");
2291 /* reschedule for later */
2292 fan_watchdog_reset();
2293 }
2294 }
2295
2296 static struct ibm_struct ibms[] = {
2297 {
2298 .name = "driver",
2299 .init = ibm_acpi_driver_init,
2300 .read = driver_read,
2301 },
2302 {
2303 .name = "hotkey",
2304 .hid = IBM_HKEY_HID,
2305 .init = hotkey_init,
2306 .read = hotkey_read,
2307 .write = hotkey_write,
2308 .exit = hotkey_exit,
2309 .notify = hotkey_notify,
2310 .handle = &hkey_handle,
2311 .type = ACPI_DEVICE_NOTIFY,
2312 },
2313 {
2314 .name = "bluetooth",
2315 .init = bluetooth_init,
2316 .read = bluetooth_read,
2317 .write = bluetooth_write,
2318 },
2319 {
2320 .name = "wan",
2321 .init = wan_init,
2322 .read = wan_read,
2323 .write = wan_write,
2324 .experimental = 1,
2325 },
2326 {
2327 .name = "video",
2328 .init = video_init,
2329 .read = video_read,
2330 .write = video_write,
2331 .exit = video_exit,
2332 },
2333 {
2334 .name = "light",
2335 .init = light_init,
2336 .read = light_read,
2337 .write = light_write,
2338 },
2339 #ifdef CONFIG_ACPI_IBM_DOCK
2340 {
2341 .name = "dock",
2342 .read = dock_read,
2343 .write = dock_write,
2344 .notify = dock_notify,
2345 .handle = &dock_handle,
2346 .type = ACPI_SYSTEM_NOTIFY,
2347 },
2348 {
2349 .name = "dock",
2350 .hid = IBM_PCI_HID,
2351 .notify = dock_notify,
2352 .handle = &pci_handle,
2353 .type = ACPI_SYSTEM_NOTIFY,
2354 },
2355 #endif
2356 {
2357 .name = "bay",
2358 .init = bay_init,
2359 .read = bay_read,
2360 .write = bay_write,
2361 .notify = bay_notify,
2362 .handle = &bay_handle,
2363 .type = ACPI_SYSTEM_NOTIFY,
2364 },
2365 {
2366 .name = "cmos",
2367 .read = cmos_read,
2368 .write = cmos_write,
2369 },
2370 {
2371 .name = "led",
2372 .init = led_init,
2373 .read = led_read,
2374 .write = led_write,
2375 },
2376 {
2377 .name = "beep",
2378 .read = beep_read,
2379 .write = beep_write,
2380 },
2381 {
2382 .name = "thermal",
2383 .init = thermal_init,
2384 .read = thermal_read,
2385 },
2386 {
2387 .name = "ecdump",
2388 .read = ecdump_read,
2389 .write = ecdump_write,
2390 .experimental = 1,
2391 },
2392 {
2393 .name = "brightness",
2394 .read = brightness_read,
2395 .write = brightness_write,
2396 .init = brightness_init,
2397 .exit = brightness_exit,
2398 },
2399 {
2400 .name = "volume",
2401 .read = volume_read,
2402 .write = volume_write,
2403 },
2404 {
2405 .name = "fan",
2406 .read = fan_read,
2407 .write = fan_write,
2408 .init = fan_init,
2409 .exit = fan_exit,
2410 .experimental = 1,
2411 },
2412 };
2413
2414 static int dispatch_read(char *page, char **start, off_t off, int count,
2415 int *eof, void *data)
2416 {
2417 struct ibm_struct *ibm = data;
2418 int len;
2419
2420 if (!ibm || !ibm->read)
2421 return -EINVAL;
2422
2423 len = ibm->read(page);
2424 if (len < 0)
2425 return len;
2426
2427 if (len <= off + count)
2428 *eof = 1;
2429 *start = page + off;
2430 len -= off;
2431 if (len > count)
2432 len = count;
2433 if (len < 0)
2434 len = 0;
2435
2436 return len;
2437 }
2438
2439 static int dispatch_write(struct file *file, const char __user * userbuf,
2440 unsigned long count, void *data)
2441 {
2442 struct ibm_struct *ibm = data;
2443 char *kernbuf;
2444 int ret;
2445
2446 if (!ibm || !ibm->write)
2447 return -EINVAL;
2448
2449 kernbuf = kmalloc(count + 2, GFP_KERNEL);
2450 if (!kernbuf)
2451 return -ENOMEM;
2452
2453 if (copy_from_user(kernbuf, userbuf, count)) {
2454 kfree(kernbuf);
2455 return -EFAULT;
2456 }
2457
2458 kernbuf[count] = 0;
2459 strcat(kernbuf, ",");
2460 ret = ibm->write(kernbuf);
2461 if (ret == 0)
2462 ret = count;
2463
2464 kfree(kernbuf);
2465
2466 return ret;
2467 }
2468
2469 static void dispatch_notify(acpi_handle handle, u32 event, void *data)
2470 {
2471 struct ibm_struct *ibm = data;
2472
2473 if (!ibm || !ibm->notify)
2474 return;
2475
2476 ibm->notify(ibm, event);
2477 }
2478
2479 static int __init setup_notify(struct ibm_struct *ibm)
2480 {
2481 acpi_status status;
2482 int ret;
2483
2484 if (!*ibm->handle)
2485 return 0;
2486
2487 ret = acpi_bus_get_device(*ibm->handle, &ibm->device);
2488 if (ret < 0) {
2489 printk(IBM_ERR "%s device not present\n", ibm->name);
2490 return 0;
2491 }
2492
2493 acpi_driver_data(ibm->device) = ibm;
2494 sprintf(acpi_device_class(ibm->device), "%s/%s", IBM_NAME, ibm->name);
2495
2496 status = acpi_install_notify_handler(*ibm->handle, ibm->type,
2497 dispatch_notify, ibm);
2498 if (ACPI_FAILURE(status)) {
2499 printk(IBM_ERR "acpi_install_notify_handler(%s) failed: %d\n",
2500 ibm->name, status);
2501 return -ENODEV;
2502 }
2503 ibm->notify_installed = 1;
2504 return 0;
2505 }
2506
2507 static int __init ibm_device_add(struct acpi_device *device)
2508 {
2509 return 0;
2510 }
2511
2512 static int __init register_driver(struct ibm_struct *ibm)
2513 {
2514 int ret;
2515
2516 ibm->driver = kzalloc(sizeof(struct acpi_driver), GFP_KERNEL);
2517 if (!ibm->driver) {
2518 printk(IBM_ERR "kmalloc(ibm->driver) failed\n");
2519 return -1;
2520 }
2521
2522 sprintf(ibm->driver->name, "%s_%s", IBM_NAME, ibm->name);
2523 ibm->driver->ids = ibm->hid;
2524 ibm->driver->ops.add = &ibm_device_add;
2525
2526 ret = acpi_bus_register_driver(ibm->driver);
2527 if (ret < 0) {
2528 printk(IBM_ERR "acpi_bus_register_driver(%s) failed: %d\n",
2529 ibm->hid, ret);
2530 kfree(ibm->driver);
2531 }
2532
2533 return ret;
2534 }
2535
2536 static int __init ibm_init(struct ibm_struct *ibm)
2537 {
2538 int ret;
2539 struct proc_dir_entry *entry;
2540
2541 if (ibm->experimental && !experimental)
2542 return 0;
2543
2544 if (ibm->hid) {
2545 ret = register_driver(ibm);
2546 if (ret < 0)
2547 return ret;
2548 ibm->driver_registered = 1;
2549 }
2550
2551 if (ibm->init) {
2552 ret = ibm->init();
2553 if (ret != 0)
2554 return ret;
2555 ibm->init_called = 1;
2556 }
2557
2558 if (ibm->read) {
2559 entry = create_proc_entry(ibm->name,
2560 S_IFREG | S_IRUGO | S_IWUSR,
2561 proc_dir);
2562 if (!entry) {
2563 printk(IBM_ERR "unable to create proc entry %s\n",
2564 ibm->name);
2565 return -ENODEV;
2566 }
2567 entry->owner = THIS_MODULE;
2568 entry->data = ibm;
2569 entry->read_proc = &dispatch_read;
2570 if (ibm->write)
2571 entry->write_proc = &dispatch_write;
2572 ibm->proc_created = 1;
2573 }
2574
2575 if (ibm->notify) {
2576 ret = setup_notify(ibm);
2577 if (ret < 0)
2578 return ret;
2579 }
2580
2581 return 0;
2582 }
2583
2584 static void ibm_exit(struct ibm_struct *ibm)
2585 {
2586 if (ibm->notify_installed)
2587 acpi_remove_notify_handler(*ibm->handle, ibm->type,
2588 dispatch_notify);
2589
2590 if (ibm->proc_created)
2591 remove_proc_entry(ibm->name, proc_dir);
2592
2593 if (ibm->init_called && ibm->exit)
2594 ibm->exit();
2595
2596 if (ibm->driver_registered) {
2597 acpi_bus_unregister_driver(ibm->driver);
2598 kfree(ibm->driver);
2599 }
2600 }
2601
2602 static void __init ibm_handle_init(char *name,
2603 acpi_handle * handle, acpi_handle parent,
2604 char **paths, int num_paths, char **path)
2605 {
2606 int i;
2607 acpi_status status;
2608
2609 for (i = 0; i < num_paths; i++) {
2610 status = acpi_get_handle(parent, paths[i], handle);
2611 if (ACPI_SUCCESS(status)) {
2612 *path = paths[i];
2613 return;
2614 }
2615 }
2616
2617 *handle = NULL;
2618 }
2619
2620 #define IBM_HANDLE_INIT(object) \
2621 ibm_handle_init(#object, &object##_handle, *object##_parent, \
2622 object##_paths, ARRAY_SIZE(object##_paths), &object##_path)
2623
2624 static int __init set_ibm_param(const char *val, struct kernel_param *kp)
2625 {
2626 unsigned int i;
2627
2628 for (i = 0; i < ARRAY_SIZE(ibms); i++)
2629 if (strcmp(ibms[i].name, kp->name) == 0 && ibms[i].write) {
2630 if (strlen(val) > sizeof(ibms[i].param) - 2)
2631 return -ENOSPC;
2632 strcpy(ibms[i].param, val);
2633 strcat(ibms[i].param, ",");
2634 return 0;
2635 }
2636
2637 return -EINVAL;
2638 }
2639
2640 #define IBM_PARAM(feature) \
2641 module_param_call(feature, set_ibm_param, NULL, NULL, 0)
2642
2643 IBM_PARAM(hotkey);
2644 IBM_PARAM(bluetooth);
2645 IBM_PARAM(video);
2646 IBM_PARAM(light);
2647 #ifdef CONFIG_ACPI_IBM_DOCK
2648 IBM_PARAM(dock);
2649 #endif
2650 IBM_PARAM(bay);
2651 IBM_PARAM(cmos);
2652 IBM_PARAM(led);
2653 IBM_PARAM(beep);
2654 IBM_PARAM(ecdump);
2655 IBM_PARAM(brightness);
2656 IBM_PARAM(volume);
2657 IBM_PARAM(fan);
2658
2659 static void acpi_ibm_exit(void)
2660 {
2661 int i;
2662
2663 for (i = ARRAY_SIZE(ibms) - 1; i >= 0; i--)
2664 ibm_exit(&ibms[i]);
2665
2666 if (proc_dir)
2667 remove_proc_entry(IBM_DIR, acpi_root_dir);
2668
2669 if (ibm_thinkpad_ec_found)
2670 kfree(ibm_thinkpad_ec_found);
2671 }
2672
2673 static char* __init check_dmi_for_ec(void)
2674 {
2675 struct dmi_device *dev = NULL;
2676 char ec_fw_string[18];
2677
2678 /*
2679 * ThinkPad T23 or newer, A31 or newer, R50e or newer,
2680 * X32 or newer, all Z series; Some models must have an
2681 * up-to-date BIOS or they will not be detected.
2682 *
2683 * See http://thinkwiki.org/wiki/List_of_DMI_IDs
2684 */
2685 while ((dev = dmi_find_device(DMI_DEV_TYPE_OEM_STRING, NULL, dev))) {
2686 if (sscanf(dev->name,
2687 "IBM ThinkPad Embedded Controller -[%17c",
2688 ec_fw_string) == 1) {
2689 ec_fw_string[sizeof(ec_fw_string) - 1] = 0;
2690 ec_fw_string[strcspn(ec_fw_string, " ]")] = 0;
2691 return kstrdup(ec_fw_string, GFP_KERNEL);
2692 }
2693 }
2694 return NULL;
2695 }
2696
2697 static int __init acpi_ibm_init(void)
2698 {
2699 int ret, i;
2700
2701 if (acpi_disabled)
2702 return -ENODEV;
2703
2704 if (!acpi_specific_hotkey_enabled) {
2705 printk(IBM_ERR "using generic hotkey driver\n");
2706 return -ENODEV;
2707 }
2708
2709 /* ec is required because many other handles are relative to it */
2710 IBM_HANDLE_INIT(ec);
2711 if (!ec_handle) {
2712 printk(IBM_ERR "ec object not found\n");
2713 return -ENODEV;
2714 }
2715
2716 /* Models with newer firmware report the EC in DMI */
2717 ibm_thinkpad_ec_found = check_dmi_for_ec();
2718
2719 /* these handles are not required */
2720 IBM_HANDLE_INIT(vid);
2721 IBM_HANDLE_INIT(vid2);
2722 IBM_HANDLE_INIT(ledb);
2723 IBM_HANDLE_INIT(led);
2724 IBM_HANDLE_INIT(hkey);
2725 IBM_HANDLE_INIT(lght);
2726 IBM_HANDLE_INIT(cmos);
2727 #ifdef CONFIG_ACPI_IBM_DOCK
2728 IBM_HANDLE_INIT(dock);
2729 #endif
2730 IBM_HANDLE_INIT(pci);
2731 IBM_HANDLE_INIT(bay);
2732 if (bay_handle)
2733 IBM_HANDLE_INIT(bay_ej);
2734 IBM_HANDLE_INIT(bay2);
2735 if (bay2_handle)
2736 IBM_HANDLE_INIT(bay2_ej);
2737 IBM_HANDLE_INIT(beep);
2738 IBM_HANDLE_INIT(ecrd);
2739 IBM_HANDLE_INIT(ecwr);
2740 IBM_HANDLE_INIT(fans);
2741 IBM_HANDLE_INIT(gfan);
2742 IBM_HANDLE_INIT(sfan);
2743
2744 proc_dir = proc_mkdir(IBM_DIR, acpi_root_dir);
2745 if (!proc_dir) {
2746 printk(IBM_ERR "unable to create proc dir %s", IBM_DIR);
2747 acpi_ibm_exit();
2748 return -ENODEV;
2749 }
2750 proc_dir->owner = THIS_MODULE;
2751
2752 for (i = 0; i < ARRAY_SIZE(ibms); i++) {
2753 ret = ibm_init(&ibms[i]);
2754 if (ret >= 0 && *ibms[i].param)
2755 ret = ibms[i].write(ibms[i].param);
2756 if (ret < 0) {
2757 acpi_ibm_exit();
2758 return ret;
2759 }
2760 }
2761
2762 return 0;
2763 }
2764
2765 module_init(acpi_ibm_init);
2766 module_exit(acpi_ibm_exit);
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree