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Linux v2.6.13
[linux-2.6/next.git] / drivers / acpi / asus_acpi.c
bloba560b1e2da7755319af1c875d3927ffab6fd88fa
1 /*
2 * asus_acpi.c - Asus Laptop ACPI Extras
3 *
4 *
5 * Copyright (C) 2002, 2003, 2004 Julien Lerouge, Karol Kozimor
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20 *
21 *
22 * The development page for this driver is located at
23 * http://sourceforge.net/projects/acpi4asus/
24 *
25 * Credits:
26 * Pontus Fuchs - Helper functions, cleanup
27 * Johann Wiesner - Small compile fixes
28 * John Belmonte - ACPI code for Toshiba laptop was a good starting point.
29 *
30 * TODO:
31 * add Fn key status
32 * Add mode selection on module loading (parameter) -> still necessary?
33 * Complete display switching -- may require dirty hacks or calling _DOS?
34 */
35
36 #include <linux/kernel.h>
37 #include <linux/module.h>
38 #include <linux/init.h>
39 #include <linux/types.h>
40 #include <linux/proc_fs.h>
41 #include <acpi/acpi_drivers.h>
42 #include <acpi/acpi_bus.h>
43 #include <asm/uaccess.h>
44
45 #define ASUS_ACPI_VERSION "0.29"
46
47 #define PROC_ASUS "asus" //the directory
48 #define PROC_MLED "mled"
49 #define PROC_WLED "wled"
50 #define PROC_TLED "tled"
51 #define PROC_INFO "info"
52 #define PROC_LCD "lcd"
53 #define PROC_BRN "brn"
54 #define PROC_DISP "disp"
55
56 #define ACPI_HOTK_NAME "Asus Laptop ACPI Extras Driver"
57 #define ACPI_HOTK_CLASS "hotkey"
58 #define ACPI_HOTK_DEVICE_NAME "Hotkey"
59 #define ACPI_HOTK_HID "ATK0100"
60
61 /*
62 * Some events we use, same for all Asus
63 */
64 #define BR_UP 0x10
65 #define BR_DOWN 0x20
66
67 /*
68 * Flags for hotk status
69 */
70 #define MLED_ON 0x01 //is MLED ON ?
71 #define WLED_ON 0x02
72 #define TLED_ON 0x04
73
74 MODULE_AUTHOR("Julien Lerouge, Karol Kozimor");
75 MODULE_DESCRIPTION(ACPI_HOTK_NAME);
76 MODULE_LICENSE("GPL");
77
78
79 static uid_t asus_uid;
80 static gid_t asus_gid;
81 module_param(asus_uid, uint, 0);
82 MODULE_PARM_DESC(uid, "UID for entries in /proc/acpi/asus.\n");
83 module_param(asus_gid, uint, 0);
84 MODULE_PARM_DESC(gid, "GID for entries in /proc/acpi/asus.\n");
85
86
87 /* For each model, all features implemented,
88 * those marked with R are relative to HOTK, A for absolute */
89 struct model_data {
90 char *name; //name of the laptop________________A
91 char *mt_mled; //method to handle mled_____________R
92 char *mled_status; //node to handle mled reading_______A
93 char *mt_wled; //method to handle wled_____________R
94 char *wled_status; //node to handle wled reading_______A
95 char *mt_tled; //method to handle tled_____________R
96 char *tled_status; //node to handle tled reading_______A
97 char *mt_lcd_switch; //method to turn LCD ON/OFF_________A
98 char *lcd_status; //node to read LCD panel state______A
99 char *brightness_up; //method to set brightness up_______A
100 char *brightness_down; //guess what ?______________________A
101 char *brightness_set; //method to set absolute brightness_R
102 char *brightness_get; //method to get absolute brightness_R
103 char *brightness_status; //node to get brightness____________A
104 char *display_set; //method to set video output________R
105 char *display_get; //method to get video output________R
106 };
107
108 /*
109 * This is the main structure, we can use it to store anything interesting
110 * about the hotk device
111 */
112 struct asus_hotk {
113 struct acpi_device *device; //the device we are in
114 acpi_handle handle; //the handle of the hotk device
115 char status; //status of the hotk, for LEDs, ...
116 struct model_data *methods; //methods available on the laptop
117 u8 brightness; //brightness level
118 enum {
119 A1x = 0, //A1340D, A1300F
120 A2x, //A2500H
121 D1x, //D1
122 L2D, //L2000D
123 L3C, //L3800C
124 L3D, //L3400D
125 L3H, //L3H, but also L2000E
126 L4R, //L4500R
127 L5x, //L5800C
128 L8L, //L8400L
129 M1A, //M1300A
130 M2E, //M2400E, L4400L
131 M6N, //M6800N
132 M6R, //M6700R
133 P30, //Samsung P30
134 S1x, //S1300A, but also L1400B and M2400A (L84F)
135 S2x, //S200 (J1 reported), Victor MP-XP7210
136 xxN, //M2400N, M3700N, M5200N, S1300N, S5200N, W1OOON
137 //(Centrino)
138 END_MODEL
139 } model; //Models currently supported
140 u16 event_count[128]; //count for each event TODO make this better
141 };
142
143 /* Here we go */
144 #define A1x_PREFIX "\\_SB.PCI0.ISA.EC0."
145 #define L3C_PREFIX "\\_SB.PCI0.PX40.ECD0."
146 #define M1A_PREFIX "\\_SB.PCI0.PX40.EC0."
147 #define P30_PREFIX "\\_SB.PCI0.LPCB.EC0."
148 #define S1x_PREFIX "\\_SB.PCI0.PX40."
149 #define S2x_PREFIX A1x_PREFIX
150 #define xxN_PREFIX "\\_SB.PCI0.SBRG.EC0."
151
152 static struct model_data model_conf[END_MODEL] = {
153 /*
154 * Those pathnames are relative to the HOTK / ATKD device :
155 * - mt_mled
156 * - mt_wled
157 * - brightness_set
158 * - brightness_get
159 * - display_set
160 * - display_get
161 *
162 * TODO I have seen a SWBX and AIBX method on some models, like L1400B,
163 * it seems to be a kind of switch, but what for ?
164 *
165 */
166
167 {
168 .name = "A1x",
169 .mt_mled = "MLED",
170 .mled_status = "\\MAIL",
171 .mt_lcd_switch = A1x_PREFIX "_Q10",
172 .lcd_status = "\\BKLI",
173 .brightness_up = A1x_PREFIX "_Q0E",
174 .brightness_down = A1x_PREFIX "_Q0F"
175 },
176
177 {
178 .name = "A2x",
179 .mt_mled = "MLED",
180 .mt_wled = "WLED",
181 .wled_status = "\\SG66",
182 .mt_lcd_switch = "\\Q10",
183 .lcd_status = "\\BAOF",
184 .brightness_set = "SPLV",
185 .brightness_get = "GPLV",
186 .display_set = "SDSP",
187 .display_get = "\\INFB"
188 },
189
190 {
191 .name = "D1x",
192 .mt_mled = "MLED",
193 .mt_lcd_switch = "\\Q0D",
194 .lcd_status = "\\GP11",
195 .brightness_up = "\\Q0C",
196 .brightness_down = "\\Q0B",
197 .brightness_status = "\\BLVL",
198 .display_set = "SDSP",
199 .display_get = "\\INFB"
200 },
201
202 {
203 .name = "L2D",
204 .mt_mled = "MLED",
205 .mled_status = "\\SGP6",
206 .mt_wled = "WLED",
207 .wled_status = "\\RCP3",
208 .mt_lcd_switch = "\\Q10",
209 .lcd_status = "\\SGP0",
210 .brightness_up = "\\Q0E",
211 .brightness_down = "\\Q0F",
212 .display_set = "SDSP",
213 .display_get = "\\INFB"
214 },
215
216 {
217 .name = "L3C",
218 .mt_mled = "MLED",
219 .mt_wled = "WLED",
220 .mt_lcd_switch = L3C_PREFIX "_Q10",
221 .lcd_status = "\\GL32",
222 .brightness_set = "SPLV",
223 .brightness_get = "GPLV",
224 .display_set = "SDSP",
225 .display_get = "\\_SB.PCI0.PCI1.VGAC.NMAP"
226 },
227
228 {
229 .name = "L3D",
230 .mt_mled = "MLED",
231 .mled_status = "\\MALD",
232 .mt_wled = "WLED",
233 .mt_lcd_switch = "\\Q10",
234 .lcd_status = "\\BKLG",
235 .brightness_set = "SPLV",
236 .brightness_get = "GPLV",
237 .display_set = "SDSP",
238 .display_get = "\\INFB"
239 },
240
241 {
242 .name = "L3H",
243 .mt_mled = "MLED",
244 .mt_wled = "WLED",
245 .mt_lcd_switch = "EHK",
246 .lcd_status = "\\_SB.PCI0.PM.PBC",
247 .brightness_set = "SPLV",
248 .brightness_get = "GPLV",
249 .display_set = "SDSP",
250 .display_get = "\\INFB"
251 },
252
253 {
254 .name = "L4R",
255 .mt_mled = "MLED",
256 .mt_wled = "WLED",
257 .wled_status = "\\_SB.PCI0.SBRG.SG13",
258 .mt_lcd_switch = xxN_PREFIX "_Q10",
259 .lcd_status = "\\_SB.PCI0.SBSM.SEO4",
260 .brightness_set = "SPLV",
261 .brightness_get = "GPLV",
262 .display_set = "SDSP",
263 .display_get = "\\_SB.PCI0.P0P1.VGA.GETD"
264 },
265
266 {
267 .name = "L5x",
268 .mt_mled = "MLED",
269 /* WLED present, but not controlled by ACPI */
270 .mt_tled = "TLED",
271 .mt_lcd_switch = "\\Q0D",
272 .lcd_status = "\\BAOF",
273 .brightness_set = "SPLV",
274 .brightness_get = "GPLV",
275 .display_set = "SDSP",
276 .display_get = "\\INFB"
277 },
278
279 {
280 .name = "L8L"
281 /* No features, but at least support the hotkeys */
282 },
283
284 {
285 .name = "M1A",
286 .mt_mled = "MLED",
287 .mt_lcd_switch = M1A_PREFIX "Q10",
288 .lcd_status = "\\PNOF",
289 .brightness_up = M1A_PREFIX "Q0E",
290 .brightness_down = M1A_PREFIX "Q0F",
291 .brightness_status = "\\BRIT",
292 .display_set = "SDSP",
293 .display_get = "\\INFB"
294 },
295
296 {
297 .name = "M2E",
298 .mt_mled = "MLED",
299 .mt_wled = "WLED",
300 .mt_lcd_switch = "\\Q10",
301 .lcd_status = "\\GP06",
302 .brightness_set = "SPLV",
303 .brightness_get = "GPLV",
304 .display_set = "SDSP",
305 .display_get = "\\INFB"
306 },
307
308 {
309 .name = "M6N",
310 .mt_mled = "MLED",
311 .mt_wled = "WLED",
312 .wled_status = "\\_SB.PCI0.SBRG.SG13",
313 .mt_lcd_switch = xxN_PREFIX "_Q10",
314 .lcd_status = "\\_SB.BKLT",
315 .brightness_set = "SPLV",
316 .brightness_get = "GPLV",
317 .display_set = "SDSP",
318 .display_get = "\\SSTE"
319 },
320 {
321 .name = "M6R",
322 .mt_mled = "MLED",
323 .mt_wled = "WLED",
324 .mt_lcd_switch = xxN_PREFIX "_Q10",
325 .lcd_status = "\\_SB.PCI0.SBSM.SEO4",
326 .brightness_set = "SPLV",
327 .brightness_get = "GPLV",
328 .display_set = "SDSP",
329 .display_get = "\\SSTE"
330 },
331
332
333 {
334 .name = "P30",
335 .mt_wled = "WLED",
336 .mt_lcd_switch = P30_PREFIX "_Q0E",
337 .lcd_status = "\\BKLT",
338 .brightness_up = P30_PREFIX "_Q68",
339 .brightness_down = P30_PREFIX "_Q69",
340 .brightness_get = "GPLV",
341 .display_set = "SDSP",
342 .display_get = "\\DNXT"
343 },
344
345 {
346 .name = "S1x",
347 .mt_mled = "MLED",
348 .mled_status = "\\EMLE",
349 .mt_wled = "WLED",
350 .mt_lcd_switch = S1x_PREFIX "Q10" ,
351 .lcd_status = "\\PNOF",
352 .brightness_set = "SPLV",
353 .brightness_get = "GPLV"
354 },
355
356 {
357 .name = "S2x",
358 .mt_mled = "MLED",
359 .mled_status = "\\MAIL",
360 .mt_lcd_switch = S2x_PREFIX "_Q10",
361 .lcd_status = "\\BKLI",
362 .brightness_up = S2x_PREFIX "_Q0B",
363 .brightness_down = S2x_PREFIX "_Q0A"
364 },
365
366 {
367 .name = "xxN",
368 .mt_mled = "MLED",
369 /* WLED present, but not controlled by ACPI */
370 .mt_lcd_switch = xxN_PREFIX "_Q10",
371 .lcd_status = "\\BKLT",
372 .brightness_set = "SPLV",
373 .brightness_get = "GPLV",
374 .display_set = "SDSP",
375 .display_get = "\\ADVG"
376 }
377 };
378
379 /* procdir we use */
380 static struct proc_dir_entry *asus_proc_dir;
381
382 /*
383 * This header is made available to allow proper configuration given model,
384 * revision number , ... this info cannot go in struct asus_hotk because it is
385 * available before the hotk
386 */
387 static struct acpi_table_header *asus_info;
388
389 /* The actual device the driver binds to */
390 static struct asus_hotk *hotk;
391
392 /*
393 * The hotkey driver declaration
394 */
395 static int asus_hotk_add(struct acpi_device *device);
396 static int asus_hotk_remove(struct acpi_device *device, int type);
397 static struct acpi_driver asus_hotk_driver = {
398 .name = ACPI_HOTK_NAME,
399 .class = ACPI_HOTK_CLASS,
400 .ids = ACPI_HOTK_HID,
401 .ops = {
402 .add = asus_hotk_add,
403 .remove = asus_hotk_remove,
404 },
405 };
406
407 /*
408 * This function evaluates an ACPI method, given an int as parameter, the
409 * method is searched within the scope of the handle, can be NULL. The output
410 * of the method is written is output, which can also be NULL
411 *
412 * returns 1 if write is successful, 0 else.
413 */
414 static int write_acpi_int(acpi_handle handle, const char *method, int val,
415 struct acpi_buffer *output)
416 {
417 struct acpi_object_list params; //list of input parameters (an int here)
418 union acpi_object in_obj; //the only param we use
419 acpi_status status;
420
421 params.count = 1;
422 params.pointer = &in_obj;
423 in_obj.type = ACPI_TYPE_INTEGER;
424 in_obj.integer.value = val;
425
426 status = acpi_evaluate_object(handle, (char *) method, &params, output);
427 return (status == AE_OK);
428 }
429
430
431 static int read_acpi_int(acpi_handle handle, const char *method, int *val)
432 {
433 struct acpi_buffer output;
434 union acpi_object out_obj;
435 acpi_status status;
436
437 output.length = sizeof(out_obj);
438 output.pointer = &out_obj;
439
440 status = acpi_evaluate_object(handle, (char *) method, NULL, &output);
441 *val = out_obj.integer.value;
442 return (status == AE_OK) && (out_obj.type == ACPI_TYPE_INTEGER);
443 }
444
445 /*
446 * We write our info in page, we begin at offset off and cannot write more
447 * than count bytes. We set eof to 1 if we handle those 2 values. We return the
448 * number of bytes written in page
449 */
450 static int
451 proc_read_info(char *page, char **start, off_t off, int count, int *eof,
452 void *data)
453 {
454 int len = 0;
455 int temp;
456 char buf[16]; //enough for all info
457 /*
458 * We use the easy way, we don't care of off and count, so we don't set eof
459 * to 1
460 */
461
462 len += sprintf(page, ACPI_HOTK_NAME " " ASUS_ACPI_VERSION "\n");
463 len += sprintf(page + len, "Model reference : %s\n",
464 hotk->methods->name);
465 /*
466 * The SFUN method probably allows the original driver to get the list
467 * of features supported by a given model. For now, 0x0100 or 0x0800
468 * bit signifies that the laptop is equipped with a Wi-Fi MiniPCI card.
469 * The significance of others is yet to be found.
470 */
471 if (read_acpi_int(hotk->handle, "SFUN", &temp))
472 len += sprintf(page + len, "SFUN value : 0x%04x\n", temp);
473 /*
474 * Another value for userspace: the ASYM method returns 0x02 for
475 * battery low and 0x04 for battery critical, its readings tend to be
476 * more accurate than those provided by _BST.
477 * Note: since not all the laptops provide this method, errors are
478 * silently ignored.
479 */
480 if (read_acpi_int(hotk->handle, "ASYM", &temp))
481 len += sprintf(page + len, "ASYM value : 0x%04x\n", temp);
482 if (asus_info) {
483 snprintf(buf, 16, "%d", asus_info->length);
484 len += sprintf(page + len, "DSDT length : %s\n", buf);
485 snprintf(buf, 16, "%d", asus_info->checksum);
486 len += sprintf(page + len, "DSDT checksum : %s\n", buf);
487 snprintf(buf, 16, "%d", asus_info->revision);
488 len += sprintf(page + len, "DSDT revision : %s\n", buf);
489 snprintf(buf, 7, "%s", asus_info->oem_id);
490 len += sprintf(page + len, "OEM id : %s\n", buf);
491 snprintf(buf, 9, "%s", asus_info->oem_table_id);
492 len += sprintf(page + len, "OEM table id : %s\n", buf);
493 snprintf(buf, 16, "%x", asus_info->oem_revision);
494 len += sprintf(page + len, "OEM revision : 0x%s\n", buf);
495 snprintf(buf, 5, "%s", asus_info->asl_compiler_id);
496 len += sprintf(page + len, "ASL comp vendor id : %s\n", buf);
497 snprintf(buf, 16, "%x", asus_info->asl_compiler_revision);
498 len += sprintf(page + len, "ASL comp revision : 0x%s\n", buf);
499 }
500
501 return len;
502 }
503
504
505 /*
506 * /proc handlers
507 * We write our info in page, we begin at offset off and cannot write more
508 * than count bytes. We set eof to 1 if we handle those 2 values. We return the
509 * number of bytes written in page
510 */
511
512 /* Generic LED functions */
513 static int
514 read_led(const char *ledname, int ledmask)
515 {
516 if (ledname) {
517 int led_status;
518
519 if (read_acpi_int(NULL, ledname, &led_status))
520 return led_status;
521 else
522 printk(KERN_WARNING "Asus ACPI: Error reading LED "
523 "status\n");
524 }
525 return (hotk->status & ledmask) ? 1 : 0;
526 }
527
528 static int parse_arg(const char __user *buf, unsigned long count, int *val)
529 {
530 char s[32];
531 if (!count)
532 return 0;
533 if (count > 31)
534 return -EINVAL;
535 if (copy_from_user(s, buf, count))
536 return -EFAULT;
537 s[count] = 0;
538 if (sscanf(s, "%i", val) != 1)
539 return -EINVAL;
540 return count;
541 }
542
543 /* FIXME: kill extraneous args so it can be called independently */
544 static int
545 write_led(const char __user *buffer, unsigned long count,
546 char *ledname, int ledmask, int invert)
547 {
548 int value;
549 int led_out = 0;
550
551 count = parse_arg(buffer, count, &value);
552 if (count > 0)
553 led_out = value ? 1 : 0;
554
555 hotk->status =
556 (led_out) ? (hotk->status | ledmask) : (hotk->status & ~ledmask);
557
558 if (invert) /* invert target value */
559 led_out = !led_out & 0x1;
560
561 if (!write_acpi_int(hotk->handle, ledname, led_out, NULL))
562 printk(KERN_WARNING "Asus ACPI: LED (%s) write failed\n", ledname);
563
564 return count;
565 }
566
567
568 /*
569 * Proc handlers for MLED
570 */
571 static int
572 proc_read_mled(char *page, char **start, off_t off, int count, int *eof,
573 void *data)
574 {
575 return sprintf(page, "%d\n", read_led(hotk->methods->mled_status, MLED_ON));
576 }
577
578
579 static int
580 proc_write_mled(struct file *file, const char __user *buffer,
581 unsigned long count, void *data)
582 {
583 return write_led(buffer, count, hotk->methods->mt_mled, MLED_ON, 1);
584 }
585
586 /*
587 * Proc handlers for WLED
588 */
589 static int
590 proc_read_wled(char *page, char **start, off_t off, int count, int *eof,
591 void *data)
592 {
593 return sprintf(page, "%d\n", read_led(hotk->methods->wled_status, WLED_ON));
594 }
595
596 static int
597 proc_write_wled(struct file *file, const char __user *buffer,
598 unsigned long count, void *data)
599 {
600 return write_led(buffer, count, hotk->methods->mt_wled, WLED_ON, 0);
601 }
602
603 /*
604 * Proc handlers for TLED
605 */
606 static int
607 proc_read_tled(char *page, char **start, off_t off, int count, int *eof,
608 void *data)
609 {
610 return sprintf(page, "%d\n", read_led(hotk->methods->tled_status, TLED_ON));
611 }
612
613 static int
614 proc_write_tled(struct file *file, const char __user *buffer,
615 unsigned long count, void *data)
616 {
617 return write_led(buffer, count, hotk->methods->mt_tled, TLED_ON, 0);
618 }
619
620
621 static int get_lcd_state(void)
622 {
623 int lcd = 0;
624
625 if (hotk->model != L3H) {
626 /* We don't have to check anything if we are here */
627 if (!read_acpi_int(NULL, hotk->methods->lcd_status, &lcd))
628 printk(KERN_WARNING "Asus ACPI: Error reading LCD status\n");
629
630 if (hotk->model == L2D)
631 lcd = ~lcd;
632 } else { /* L3H and the like have to be handled differently */
633 acpi_status status = 0;
634 struct acpi_object_list input;
635 union acpi_object mt_params[2];
636 struct acpi_buffer output;
637 union acpi_object out_obj;
638
639 input.count = 2;
640 input.pointer = mt_params;
641 /* Note: the following values are partly guessed up, but
642 otherwise they seem to work */
643 mt_params[0].type = ACPI_TYPE_INTEGER;
644 mt_params[0].integer.value = 0x02;
645 mt_params[1].type = ACPI_TYPE_INTEGER;
646 mt_params[1].integer.value = 0x02;
647
648 output.length = sizeof(out_obj);
649 output.pointer = &out_obj;
650
651 status = acpi_evaluate_object(NULL, hotk->methods->lcd_status, &input, &output);
652 if (status != AE_OK)
653 return -1;
654 if (out_obj.type == ACPI_TYPE_INTEGER)
655 /* That's what the AML code does */
656 lcd = out_obj.integer.value >> 8;
657 }
658
659 return (lcd & 1);
660 }
661
662 static int set_lcd_state(int value)
663 {
664 int lcd = 0;
665 acpi_status status = 0;
666
667 lcd = value ? 1 : 0;
668 if (lcd != get_lcd_state()) {
669 /* switch */
670 if (hotk->model != L3H) {
671 status =
672 acpi_evaluate_object(NULL, hotk->methods->mt_lcd_switch,
673 NULL, NULL);
674 } else { /* L3H and the like have to be handled differently */
675 if (!write_acpi_int(hotk->handle, hotk->methods->mt_lcd_switch, 0x07, NULL))
676 status = AE_ERROR;
677 /* L3H's AML executes EHK (0x07) upon Fn+F7 keypress,
678 the exact behaviour is simulated here */
679 }
680 if (ACPI_FAILURE(status))
681 printk(KERN_WARNING "Asus ACPI: Error switching LCD\n");
682 }
683 return 0;
684
685 }
686
687 static int
688 proc_read_lcd(char *page, char **start, off_t off, int count, int *eof,
689 void *data)
690 {
691 return sprintf(page, "%d\n", get_lcd_state());
692 }
693
694
695 static int
696 proc_write_lcd(struct file *file, const char __user *buffer,
697 unsigned long count, void *data)
698 {
699 int value;
700
701 count = parse_arg(buffer, count, &value);
702 if (count > 0)
703 set_lcd_state(value);
704 return count;
705 }
706
707
708 static int read_brightness(void)
709 {
710 int value;
711
712 if(hotk->methods->brightness_get) { /* SPLV/GPLV laptop */
713 if (!read_acpi_int(hotk->handle, hotk->methods->brightness_get,
714 &value))
715 printk(KERN_WARNING "Asus ACPI: Error reading brightness\n");
716 } else if (hotk->methods->brightness_status) { /* For D1 for example */
717 if (!read_acpi_int(NULL, hotk->methods->brightness_status,
718 &value))
719 printk(KERN_WARNING "Asus ACPI: Error reading brightness\n");
720 } else /* No GPLV method */
721 value = hotk->brightness;
722 return value;
723 }
724
725 /*
726 * Change the brightness level
727 */
728 static void set_brightness(int value)
729 {
730 acpi_status status = 0;
731
732 /* SPLV laptop */
733 if(hotk->methods->brightness_set) {
734 if (!write_acpi_int(hotk->handle, hotk->methods->brightness_set,
735 value, NULL))
736 printk(KERN_WARNING "Asus ACPI: Error changing brightness\n");
737 return;
738 }
739
740 /* No SPLV method if we are here, act as appropriate */
741 value -= read_brightness();
742 while (value != 0) {
743 status = acpi_evaluate_object(NULL, (value > 0) ?
744 hotk->methods->brightness_up :
745 hotk->methods->brightness_down,
746 NULL, NULL);
747 (value > 0) ? value-- : value++;
748 if (ACPI_FAILURE(status))
749 printk(KERN_WARNING "Asus ACPI: Error changing brightness\n");
750 }
751 return;
752 }
753
754 static int
755 proc_read_brn(char *page, char **start, off_t off, int count, int *eof,
756 void *data)
757 {
758 return sprintf(page, "%d\n", read_brightness());
759 }
760
761 static int
762 proc_write_brn(struct file *file, const char __user *buffer,
763 unsigned long count, void *data)
764 {
765 int value;
766
767 count = parse_arg(buffer, count, &value);
768 if (count > 0) {
769 value = (0 < value) ? ((15 < value) ? 15 : value) : 0;
770 /* 0 <= value <= 15 */
771 set_brightness(value);
772 } else if (count < 0) {
773 printk(KERN_WARNING "Asus ACPI: Error reading user input\n");
774 }
775
776 return count;
777 }
778
779 static void set_display(int value)
780 {
781 /* no sanity check needed for now */
782 if (!write_acpi_int(hotk->handle, hotk->methods->display_set,
783 value, NULL))
784 printk(KERN_WARNING "Asus ACPI: Error setting display\n");
785 return;
786 }
787
788 /*
789 * Now, *this* one could be more user-friendly, but so far, no-one has
790 * complained. The significance of bits is the same as in proc_write_disp()
791 */
792 static int
793 proc_read_disp(char *page, char **start, off_t off, int count, int *eof,
794 void *data)
795 {
796 int value = 0;
797
798 if (!read_acpi_int(hotk->handle, hotk->methods->display_get, &value))
799 printk(KERN_WARNING "Asus ACPI: Error reading display status\n");
800 value &= 0x07; /* needed for some models, shouldn't hurt others */
801 return sprintf(page, "%d\n", value);
802 }
803
804 /*
805 * Experimental support for display switching. As of now: 1 should activate
806 * the LCD output, 2 should do for CRT, and 4 for TV-Out. Any combination
807 * (bitwise) of these will suffice. I never actually tested 3 displays hooked up
808 * simultaneously, so be warned. See the acpi4asus README for more info.
809 */
810 static int
811 proc_write_disp(struct file *file, const char __user *buffer,
812 unsigned long count, void *data)
813 {
814 int value;
815
816 count = parse_arg(buffer, count, &value);
817 if (count > 0)
818 set_display(value);
819 else if (count < 0)
820 printk(KERN_WARNING "Asus ACPI: Error reading user input\n");
821
822 return count;
823 }
824
825
826 typedef int (proc_readfunc)(char *page, char **start, off_t off, int count,
827 int *eof, void *data);
828 typedef int (proc_writefunc)(struct file *file, const char __user *buffer,
829 unsigned long count, void *data);
830
831 static int
832 __init asus_proc_add(char *name, proc_writefunc *writefunc,
833 proc_readfunc *readfunc, mode_t mode,
834 struct acpi_device *device)
835 {
836 struct proc_dir_entry *proc = create_proc_entry(name, mode, acpi_device_dir(device));
837 if(!proc) {
838 printk(KERN_WARNING " Unable to create %s fs entry\n", name);
839 return -1;
840 }
841 proc->write_proc = writefunc;
842 proc->read_proc = readfunc;
843 proc->data = acpi_driver_data(device);
844 proc->owner = THIS_MODULE;
845 proc->uid = asus_uid;
846 proc->gid = asus_gid;
847 return 0;
848 }
849
850 static int __init asus_hotk_add_fs(struct acpi_device *device)
851 {
852 struct proc_dir_entry *proc;
853 mode_t mode;
854
855 /*
856 * If parameter uid or gid is not changed, keep the default setting for
857 * our proc entries (-rw-rw-rw-) else, it means we care about security,
858 * and then set to -rw-rw----
859 */
860
861 if ((asus_uid == 0) && (asus_gid == 0)){
862 mode = S_IFREG | S_IRUGO | S_IWUGO;
863 } else {
864 mode = S_IFREG | S_IRUSR | S_IRGRP | S_IWUSR | S_IWGRP;
865 }
866
867 acpi_device_dir(device) = asus_proc_dir;
868 if (!acpi_device_dir(device))
869 return -ENODEV;
870
871 proc = create_proc_entry(PROC_INFO, mode, acpi_device_dir(device));
872 if (proc) {
873 proc->read_proc = proc_read_info;
874 proc->data = acpi_driver_data(device);
875 proc->owner = THIS_MODULE;
876 proc->uid = asus_uid;
877 proc->gid = asus_gid;
878 } else {
879 printk(KERN_WARNING " Unable to create " PROC_INFO
880 " fs entry\n");
881 }
882
883 if (hotk->methods->mt_wled) {
884 asus_proc_add(PROC_WLED, &proc_write_wled, &proc_read_wled, mode, device);
885 }
886
887 if (hotk->methods->mt_mled) {
888 asus_proc_add(PROC_MLED, &proc_write_mled, &proc_read_mled, mode, device);
889 }
890
891 if (hotk->methods->mt_tled) {
892 asus_proc_add(PROC_TLED, &proc_write_tled, &proc_read_tled, mode, device);
893 }
894
895 /*
896 * We need both read node and write method as LCD switch is also accessible
897 * from keyboard
898 */
899 if (hotk->methods->mt_lcd_switch && hotk->methods->lcd_status) {
900 asus_proc_add(PROC_LCD, &proc_write_lcd, &proc_read_lcd, mode, device);
901 }
902
903 if ((hotk->methods->brightness_up && hotk->methods->brightness_down) ||
904 (hotk->methods->brightness_get && hotk->methods->brightness_set)) {
905 asus_proc_add(PROC_BRN, &proc_write_brn, &proc_read_brn, mode, device);
906 }
907
908 if (hotk->methods->display_set) {
909 asus_proc_add(PROC_DISP, &proc_write_disp, &proc_read_disp, mode, device);
910 }
911
912 return 0;
913 }
914
915 static int asus_hotk_remove_fs(struct acpi_device* device)
916 {
917 if(acpi_device_dir(device)) {
918 remove_proc_entry(PROC_INFO,acpi_device_dir(device));
919 if (hotk->methods->mt_wled)
920 remove_proc_entry(PROC_WLED,acpi_device_dir(device));
921 if (hotk->methods->mt_mled)
922 remove_proc_entry(PROC_MLED,acpi_device_dir(device));
923 if (hotk->methods->mt_tled)
924 remove_proc_entry(PROC_TLED,acpi_device_dir(device));
925 if (hotk->methods->mt_lcd_switch && hotk->methods->lcd_status)
926 remove_proc_entry(PROC_LCD, acpi_device_dir(device));
927 if ((hotk->methods->brightness_up && hotk->methods->brightness_down) ||
928 (hotk->methods->brightness_get && hotk->methods->brightness_set))
929 remove_proc_entry(PROC_BRN, acpi_device_dir(device));
930 if (hotk->methods->display_set)
931 remove_proc_entry(PROC_DISP, acpi_device_dir(device));
932 }
933 return 0;
934 }
935
936
937 static void asus_hotk_notify(acpi_handle handle, u32 event, void *data)
938 {
939 /* TODO Find a better way to handle events count.*/
940 if (!hotk)
941 return;
942
943 if ((event & ~((u32) BR_UP)) < 16) {
944 hotk->brightness = (event & ~((u32) BR_UP));
945 } else if ((event & ~((u32) BR_DOWN)) < 16 ) {
946 hotk->brightness = (event & ~((u32) BR_DOWN));
947 }
948
949 acpi_bus_generate_event(hotk->device, event,
950 hotk->event_count[event % 128]++);
951
952 return;
953 }
954
955 /*
956 * This function is used to initialize the hotk with right values. In this
957 * method, we can make all the detection we want, and modify the hotk struct
958 */
959 static int __init asus_hotk_get_info(void)
960 {
961 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
962 struct acpi_buffer dsdt = { ACPI_ALLOCATE_BUFFER, NULL };
963 union acpi_object *model = NULL;
964 int bsts_result;
965 acpi_status status;
966
967 /*
968 * Get DSDT headers early enough to allow for differentiating between
969 * models, but late enough to allow acpi_bus_register_driver() to fail
970 * before doing anything ACPI-specific. Should we encounter a machine,
971 * which needs special handling (i.e. its hotkey device has a different
972 * HID), this bit will be moved. A global variable asus_info contains
973 * the DSDT header.
974 */
975 status = acpi_get_table(ACPI_TABLE_DSDT, 1, &dsdt);
976 if (ACPI_FAILURE(status))
977 printk(KERN_WARNING " Couldn't get the DSDT table header\n");
978 else
979 asus_info = (struct acpi_table_header *) dsdt.pointer;
980
981 /* We have to write 0 on init this far for all ASUS models */
982 if (!write_acpi_int(hotk->handle, "INIT", 0, &buffer)) {
983 printk(KERN_ERR " Hotkey initialization failed\n");
984 return -ENODEV;
985 }
986
987 /* This needs to be called for some laptops to init properly */
988 if (!read_acpi_int(hotk->handle, "BSTS", &bsts_result))
989 printk(KERN_WARNING " Error calling BSTS\n");
990 else if (bsts_result)
991 printk(KERN_NOTICE " BSTS called, 0x%02x returned\n", bsts_result);
992
993 /* Samsung P30 has a device with a valid _HID whose INIT does not
994 * return anything. Catch this one and any similar here */
995 if (buffer.pointer == NULL) {
996 if (asus_info && /* Samsung P30 */
997 strncmp(asus_info->oem_table_id, "ODEM", 4) == 0) {
998 hotk->model = P30;
999 printk(KERN_NOTICE " Samsung P30 detected, supported\n");
1000 } else {
1001 hotk->model = M2E;
1002 printk(KERN_WARNING " no string returned by INIT\n");
1003 printk(KERN_WARNING " trying default values, supply "
1004 "the developers with your DSDT\n");
1005 }
1006 hotk->methods = &model_conf[hotk->model];
1007 return AE_OK;
1008 }
1009
1010 model = (union acpi_object *) buffer.pointer;
1011 if (model->type == ACPI_TYPE_STRING) {
1012 printk(KERN_NOTICE " %s model detected, ", model->string.pointer);
1013 }
1014
1015 hotk->model = END_MODEL;
1016 if (strncmp(model->string.pointer, "L3D", 3) == 0)
1017 hotk->model = L3D;
1018 else if (strncmp(model->string.pointer, "L3H", 3) == 0 ||
1019 strncmp(model->string.pointer, "L2E", 3) == 0)
1020 hotk->model = L3H;
1021 else if (strncmp(model->string.pointer, "L3", 2) == 0 ||
1022 strncmp(model->string.pointer, "L2B", 3) == 0)
1023 hotk->model = L3C;
1024 else if (strncmp(model->string.pointer, "L8L", 3) == 0)
1025 hotk->model = L8L;
1026 else if (strncmp(model->string.pointer, "L4R", 3) == 0)
1027 hotk->model = L4R;
1028 else if (strncmp(model->string.pointer, "M6N", 3) == 0)
1029 hotk->model = M6N;
1030 else if (strncmp(model->string.pointer, "M6R", 3) == 0)
1031 hotk->model = M6R;
1032 else if (strncmp(model->string.pointer, "M2N", 3) == 0 ||
1033 strncmp(model->string.pointer, "M3N", 3) == 0 ||
1034 strncmp(model->string.pointer, "M5N", 3) == 0 ||
1035 strncmp(model->string.pointer, "M6N", 3) == 0 ||
1036 strncmp(model->string.pointer, "S1N", 3) == 0 ||
1037 strncmp(model->string.pointer, "S5N", 3) == 0 ||
1038 strncmp(model->string.pointer, "W1N", 3) == 0)
1039 hotk->model = xxN;
1040 else if (strncmp(model->string.pointer, "M1", 2) == 0)
1041 hotk->model = M1A;
1042 else if (strncmp(model->string.pointer, "M2", 2) == 0 ||
1043 strncmp(model->string.pointer, "L4E", 3) == 0)
1044 hotk->model = M2E;
1045 else if (strncmp(model->string.pointer, "L2", 2) == 0)
1046 hotk->model = L2D;
1047 else if (strncmp(model->string.pointer, "L8", 2) == 0)
1048 hotk->model = S1x;
1049 else if (strncmp(model->string.pointer, "D1", 2) == 0)
1050 hotk->model = D1x;
1051 else if (strncmp(model->string.pointer, "A1", 2) == 0)
1052 hotk->model = A1x;
1053 else if (strncmp(model->string.pointer, "A2", 2) == 0)
1054 hotk->model = A2x;
1055 else if (strncmp(model->string.pointer, "J1", 2) == 0)
1056 hotk->model = S2x;
1057 else if (strncmp(model->string.pointer, "L5", 2) == 0)
1058 hotk->model = L5x;
1059
1060 if (hotk->model == END_MODEL) {
1061 printk("unsupported, trying default values, supply the "
1062 "developers with your DSDT\n");
1063 hotk->model = M2E;
1064 } else {
1065 printk("supported\n");
1066 }
1067
1068 hotk->methods = &model_conf[hotk->model];
1069
1070 /* Sort of per-model blacklist */
1071 if (strncmp(model->string.pointer, "L2B", 3) == 0)
1072 hotk->methods->lcd_status = NULL;
1073 /* L2B is similar enough to L3C to use its settings, with this only
1074 exception */
1075 else if (strncmp(model->string.pointer, "S5N", 3) == 0 ||
1076 strncmp(model->string.pointer, "M5N", 3) == 0)
1077 hotk->methods->mt_mled = NULL;
1078 /* S5N and M5N have no MLED */
1079 else if (strncmp(model->string.pointer, "M2N", 3) == 0 ||
1080 strncmp(model->string.pointer, "W1N", 3) == 0)
1081 hotk->methods->mt_wled = "WLED";
1082 /* M2N and W1N have a usable WLED */
1083 else if (asus_info) {
1084 if (strncmp(asus_info->oem_table_id, "L1", 2) == 0)
1085 hotk->methods->mled_status = NULL;
1086 /* S1300A reports L84F, but L1400B too, account for that */
1087 }
1088
1089 acpi_os_free(model);
1090
1091 return AE_OK;
1092 }
1093
1094
1095 static int __init asus_hotk_check(void)
1096 {
1097 int result = 0;
1098
1099 result = acpi_bus_get_status(hotk->device);
1100 if (result)
1101 return result;
1102
1103 if (hotk->device->status.present) {
1104 result = asus_hotk_get_info();
1105 } else {
1106 printk(KERN_ERR " Hotkey device not present, aborting\n");
1107 return -EINVAL;
1108 }
1109
1110 return result;
1111 }
1112
1113
1114 static int __init asus_hotk_add(struct acpi_device *device)
1115 {
1116 acpi_status status = AE_OK;
1117 int result;
1118
1119 if (!device)
1120 return -EINVAL;
1121
1122 printk(KERN_NOTICE "Asus Laptop ACPI Extras version %s\n",
1123 ASUS_ACPI_VERSION);
1124
1125 hotk =
1126 (struct asus_hotk *) kmalloc(sizeof(struct asus_hotk), GFP_KERNEL);
1127 if (!hotk)
1128 return -ENOMEM;
1129 memset(hotk, 0, sizeof(struct asus_hotk));
1130
1131 hotk->handle = device->handle;
1132 strcpy(acpi_device_name(device), ACPI_HOTK_DEVICE_NAME);
1133 strcpy(acpi_device_class(device), ACPI_HOTK_CLASS);
1134 acpi_driver_data(device) = hotk;
1135 hotk->device = device;
1136
1137
1138 result = asus_hotk_check();
1139 if (result)
1140 goto end;
1141
1142 result = asus_hotk_add_fs(device);
1143 if (result)
1144 goto end;
1145
1146 /*
1147 * We install the handler, it will receive the hotk in parameter, so, we
1148 * could add other data to the hotk struct
1149 */
1150 status = acpi_install_notify_handler(hotk->handle, ACPI_SYSTEM_NOTIFY,
1151 asus_hotk_notify, hotk);
1152 if (ACPI_FAILURE(status))
1153 printk(KERN_ERR " Error installing notify handler\n");
1154
1155 /* For laptops without GPLV: init the hotk->brightness value */
1156 if ((!hotk->methods->brightness_get) && (!hotk->methods->brightness_status) &&
1157 (hotk->methods->brightness_up && hotk->methods->brightness_down)) {
1158 status = acpi_evaluate_object(NULL, hotk->methods->brightness_down,
1159 NULL, NULL);
1160 if (ACPI_FAILURE(status))
1161 printk(KERN_WARNING " Error changing brightness\n");
1162 else {
1163 status = acpi_evaluate_object(NULL, hotk->methods->brightness_up,
1164 NULL, NULL);
1165 if (ACPI_FAILURE(status))
1166 printk(KERN_WARNING " Strange, error changing"
1167 " brightness\n");
1168 }
1169 }
1170
1171 end:
1172 if (result) {
1173 kfree(hotk);
1174 }
1175
1176 return result;
1177 }
1178
1179
1180 static int asus_hotk_remove(struct acpi_device *device, int type)
1181 {
1182 acpi_status status = 0;
1183
1184 if (!device || !acpi_driver_data(device))
1185 return -EINVAL;
1186
1187 status = acpi_remove_notify_handler(hotk->handle, ACPI_SYSTEM_NOTIFY,
1188 asus_hotk_notify);
1189 if (ACPI_FAILURE(status))
1190 printk(KERN_ERR "Asus ACPI: Error removing notify handler\n");
1191
1192 asus_hotk_remove_fs(device);
1193
1194 kfree(hotk);
1195
1196 return 0;
1197 }
1198
1199
1200 static int __init asus_acpi_init(void)
1201 {
1202 int result;
1203
1204 if (acpi_disabled)
1205 return -ENODEV;
1206
1207 if (!acpi_specific_hotkey_enabled){
1208 printk(KERN_ERR "Using generic hotkey driver\n");
1209 return -ENODEV;
1210 }
1211 asus_proc_dir = proc_mkdir(PROC_ASUS, acpi_root_dir);
1212 if (!asus_proc_dir) {
1213 printk(KERN_ERR "Asus ACPI: Unable to create /proc entry\n");
1214 return -ENODEV;
1215 }
1216 asus_proc_dir->owner = THIS_MODULE;
1217
1218 result = acpi_bus_register_driver(&asus_hotk_driver);
1219 if (result < 1) {
1220 acpi_bus_unregister_driver(&asus_hotk_driver);
1221 remove_proc_entry(PROC_ASUS, acpi_root_dir);
1222 return -ENODEV;
1223 }
1224
1225 return 0;
1226 }
1227
1228
1229 static void __exit asus_acpi_exit(void)
1230 {
1231 acpi_bus_unregister_driver(&asus_hotk_driver);
1232 remove_proc_entry(PROC_ASUS, acpi_root_dir);
1233
1234 acpi_os_free(asus_info);
1235
1236 return;
1237 }
1238
1239 module_init(asus_acpi_init);
1240 module_exit(asus_acpi_exit);
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