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Merge git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6
[wrt350n-kernel.git] / drivers / acpi / asus_acpi.c
blob53aa3ed2bcda4b1b89959cabe80845e05872bf9c
1 /*
2 * asus_acpi.c - Asus Laptop ACPI Extras
3 *
4 *
5 * Copyright (C) 2002-2005 Julien Lerouge, 2003-2006 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 * �ic Burghard - LED display support for W1N
30 *
31 */
32
33 #include <linux/kernel.h>
34 #include <linux/module.h>
35 #include <linux/init.h>
36 #include <linux/types.h>
37 #include <linux/proc_fs.h>
38 #include <linux/backlight.h>
39 #include <acpi/acpi_drivers.h>
40 #include <acpi/acpi_bus.h>
41 #include <asm/uaccess.h>
42
43 #define ASUS_ACPI_VERSION "0.30"
44
45 #define PROC_ASUS "asus" //the directory
46 #define PROC_MLED "mled"
47 #define PROC_WLED "wled"
48 #define PROC_TLED "tled"
49 #define PROC_BT "bluetooth"
50 #define PROC_LEDD "ledd"
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
60 /*
61 * Some events we use, same for all Asus
62 */
63 #define BR_UP 0x10
64 #define BR_DOWN 0x20
65
66 /*
67 * Flags for hotk status
68 */
69 #define MLED_ON 0x01 //mail LED
70 #define WLED_ON 0x02 //wireless LED
71 #define TLED_ON 0x04 //touchpad LED
72 #define BT_ON 0x08 //internal Bluetooth
73
74 MODULE_AUTHOR("Julien Lerouge, Karol Kozimor");
75 MODULE_DESCRIPTION(ACPI_HOTK_NAME);
76 MODULE_LICENSE("GPL");
77
78 static uid_t asus_uid;
79 static gid_t asus_gid;
80 module_param(asus_uid, uint, 0);
81 MODULE_PARM_DESC(asus_uid, "UID for entries in /proc/acpi/asus.\n");
82 module_param(asus_gid, uint, 0);
83 MODULE_PARM_DESC(asus_gid, "GID for entries in /proc/acpi/asus.\n");
84
85 /* For each model, all features implemented,
86 * those marked with R are relative to HOTK, A for absolute */
87 struct model_data {
88 char *name; //name of the laptop________________A
89 char *mt_mled; //method to handle mled_____________R
90 char *mled_status; //node to handle mled reading_______A
91 char *mt_wled; //method to handle wled_____________R
92 char *wled_status; //node to handle wled reading_______A
93 char *mt_tled; //method to handle tled_____________R
94 char *tled_status; //node to handle tled reading_______A
95 char *mt_ledd; //method to handle LED display______R
96 char *mt_bt_switch; //method to switch Bluetooth on/off_R
97 char *bt_status; //no model currently supports this__?
98 char *mt_lcd_switch; //method to turn LCD on/off_________A
99 char *lcd_status; //node to read LCD panel state______A
100 char *brightness_up; //method to set brightness up_______A
101 char *brightness_down; //guess what ?______________________A
102 char *brightness_set; //method to set absolute brightness_R
103 char *brightness_get; //method to get absolute brightness_R
104 char *brightness_status; //node to get brightness____________A
105 char *display_set; //method to set video output________R
106 char *display_get; //method to get video output________R
107 };
108
109 /*
110 * This is the main structure, we can use it to store anything interesting
111 * about the hotk device
112 */
113 struct asus_hotk {
114 struct acpi_device *device; //the device we are in
115 acpi_handle handle; //the handle of the hotk device
116 char status; //status of the hotk, for LEDs, ...
117 u32 ledd_status; //status of the LED display
118 struct model_data *methods; //methods available on the laptop
119 u8 brightness; //brightness level
120 enum {
121 A1x = 0, //A1340D, A1300F
122 A2x, //A2500H
123 A4G, //A4700G
124 D1x, //D1
125 L2D, //L2000D
126 L3C, //L3800C
127 L3D, //L3400D
128 L3H, //L3H, L2000E, L5D
129 L4R, //L4500R
130 L5x, //L5800C
131 L8L, //L8400L
132 M1A, //M1300A
133 M2E, //M2400E, L4400L
134 M6N, //M6800N, W3400N
135 M6R, //M6700R, A3000G
136 P30, //Samsung P30
137 S1x, //S1300A, but also L1400B and M2400A (L84F)
138 S2x, //S200 (J1 reported), Victor MP-XP7210
139 W1N, //W1000N
140 W5A, //W5A
141 W3V, //W3030V
142 xxN, //M2400N, M3700N, M5200N, M6800N, S1300N, S5200N
143 A4S, //Z81sp
144 //(Centrino)
145 F3Sa,
146 END_MODEL
147 } model; //Models currently supported
148 u16 event_count[128]; //count for each event TODO make this better
149 };
150
151 /* Here we go */
152 #define A1x_PREFIX "\\_SB.PCI0.ISA.EC0."
153 #define L3C_PREFIX "\\_SB.PCI0.PX40.ECD0."
154 #define M1A_PREFIX "\\_SB.PCI0.PX40.EC0."
155 #define P30_PREFIX "\\_SB.PCI0.LPCB.EC0."
156 #define S1x_PREFIX "\\_SB.PCI0.PX40."
157 #define S2x_PREFIX A1x_PREFIX
158 #define xxN_PREFIX "\\_SB.PCI0.SBRG.EC0."
159
160 static struct model_data model_conf[END_MODEL] = {
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 .name = "A1x",
168 .mt_mled = "MLED",
169 .mled_status = "\\MAIL",
170 .mt_lcd_switch = A1x_PREFIX "_Q10",
171 .lcd_status = "\\BKLI",
172 .brightness_up = A1x_PREFIX "_Q0E",
173 .brightness_down = A1x_PREFIX "_Q0F"},
174
175 {
176 .name = "A2x",
177 .mt_mled = "MLED",
178 .mt_wled = "WLED",
179 .wled_status = "\\SG66",
180 .mt_lcd_switch = "\\Q10",
181 .lcd_status = "\\BAOF",
182 .brightness_set = "SPLV",
183 .brightness_get = "GPLV",
184 .display_set = "SDSP",
185 .display_get = "\\INFB"},
186
187 {
188 .name = "A4G",
189 .mt_mled = "MLED",
190 /* WLED present, but not controlled by ACPI */
191 .mt_lcd_switch = xxN_PREFIX "_Q10",
192 .brightness_set = "SPLV",
193 .brightness_get = "GPLV",
194 .display_set = "SDSP",
195 .display_get = "\\ADVG"},
196
197 {
198 .name = "D1x",
199 .mt_mled = "MLED",
200 .mt_lcd_switch = "\\Q0D",
201 .lcd_status = "\\GP11",
202 .brightness_up = "\\Q0C",
203 .brightness_down = "\\Q0B",
204 .brightness_status = "\\BLVL",
205 .display_set = "SDSP",
206 .display_get = "\\INFB"},
207
208 {
209 .name = "L2D",
210 .mt_mled = "MLED",
211 .mled_status = "\\SGP6",
212 .mt_wled = "WLED",
213 .wled_status = "\\RCP3",
214 .mt_lcd_switch = "\\Q10",
215 .lcd_status = "\\SGP0",
216 .brightness_up = "\\Q0E",
217 .brightness_down = "\\Q0F",
218 .display_set = "SDSP",
219 .display_get = "\\INFB"},
220
221 {
222 .name = "L3C",
223 .mt_mled = "MLED",
224 .mt_wled = "WLED",
225 .mt_lcd_switch = L3C_PREFIX "_Q10",
226 .lcd_status = "\\GL32",
227 .brightness_set = "SPLV",
228 .brightness_get = "GPLV",
229 .display_set = "SDSP",
230 .display_get = "\\_SB.PCI0.PCI1.VGAC.NMAP"},
231
232 {
233 .name = "L3D",
234 .mt_mled = "MLED",
235 .mled_status = "\\MALD",
236 .mt_wled = "WLED",
237 .mt_lcd_switch = "\\Q10",
238 .lcd_status = "\\BKLG",
239 .brightness_set = "SPLV",
240 .brightness_get = "GPLV",
241 .display_set = "SDSP",
242 .display_get = "\\INFB"},
243
244 {
245 .name = "L3H",
246 .mt_mled = "MLED",
247 .mt_wled = "WLED",
248 .mt_lcd_switch = "EHK",
249 .lcd_status = "\\_SB.PCI0.PM.PBC",
250 .brightness_set = "SPLV",
251 .brightness_get = "GPLV",
252 .display_set = "SDSP",
253 .display_get = "\\INFB"},
254
255 {
256 .name = "L4R",
257 .mt_mled = "MLED",
258 .mt_wled = "WLED",
259 .wled_status = "\\_SB.PCI0.SBRG.SG13",
260 .mt_lcd_switch = xxN_PREFIX "_Q10",
261 .lcd_status = "\\_SB.PCI0.SBSM.SEO4",
262 .brightness_set = "SPLV",
263 .brightness_get = "GPLV",
264 .display_set = "SDSP",
265 .display_get = "\\_SB.PCI0.P0P1.VGA.GETD"},
266
267 {
268 .name = "L5x",
269 .mt_mled = "MLED",
270 /* WLED present, but not controlled by ACPI */
271 .mt_tled = "TLED",
272 .mt_lcd_switch = "\\Q0D",
273 .lcd_status = "\\BAOF",
274 .brightness_set = "SPLV",
275 .brightness_get = "GPLV",
276 .display_set = "SDSP",
277 .display_get = "\\INFB"},
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 .name = "M2E",
297 .mt_mled = "MLED",
298 .mt_wled = "WLED",
299 .mt_lcd_switch = "\\Q10",
300 .lcd_status = "\\GP06",
301 .brightness_set = "SPLV",
302 .brightness_get = "GPLV",
303 .display_set = "SDSP",
304 .display_get = "\\INFB"},
305
306 {
307 .name = "M6N",
308 .mt_mled = "MLED",
309 .mt_wled = "WLED",
310 .wled_status = "\\_SB.PCI0.SBRG.SG13",
311 .mt_lcd_switch = xxN_PREFIX "_Q10",
312 .lcd_status = "\\_SB.BKLT",
313 .brightness_set = "SPLV",
314 .brightness_get = "GPLV",
315 .display_set = "SDSP",
316 .display_get = "\\SSTE"},
317
318 {
319 .name = "M6R",
320 .mt_mled = "MLED",
321 .mt_wled = "WLED",
322 .mt_lcd_switch = xxN_PREFIX "_Q10",
323 .lcd_status = "\\_SB.PCI0.SBSM.SEO4",
324 .brightness_set = "SPLV",
325 .brightness_get = "GPLV",
326 .display_set = "SDSP",
327 .display_get = "\\_SB.PCI0.P0P1.VGA.GETD"},
328
329 {
330 .name = "P30",
331 .mt_wled = "WLED",
332 .mt_lcd_switch = P30_PREFIX "_Q0E",
333 .lcd_status = "\\BKLT",
334 .brightness_up = P30_PREFIX "_Q68",
335 .brightness_down = P30_PREFIX "_Q69",
336 .brightness_get = "GPLV",
337 .display_set = "SDSP",
338 .display_get = "\\DNXT"},
339
340 {
341 .name = "S1x",
342 .mt_mled = "MLED",
343 .mled_status = "\\EMLE",
344 .mt_wled = "WLED",
345 .mt_lcd_switch = S1x_PREFIX "Q10",
346 .lcd_status = "\\PNOF",
347 .brightness_set = "SPLV",
348 .brightness_get = "GPLV"},
349
350 {
351 .name = "S2x",
352 .mt_mled = "MLED",
353 .mled_status = "\\MAIL",
354 .mt_lcd_switch = S2x_PREFIX "_Q10",
355 .lcd_status = "\\BKLI",
356 .brightness_up = S2x_PREFIX "_Q0B",
357 .brightness_down = S2x_PREFIX "_Q0A"},
358
359 {
360 .name = "W1N",
361 .mt_mled = "MLED",
362 .mt_wled = "WLED",
363 .mt_ledd = "SLCM",
364 .mt_lcd_switch = xxN_PREFIX "_Q10",
365 .lcd_status = "\\BKLT",
366 .brightness_set = "SPLV",
367 .brightness_get = "GPLV",
368 .display_set = "SDSP",
369 .display_get = "\\ADVG"},
370
371 {
372 .name = "W5A",
373 .mt_bt_switch = "BLED",
374 .mt_wled = "WLED",
375 .mt_lcd_switch = xxN_PREFIX "_Q10",
376 .brightness_set = "SPLV",
377 .brightness_get = "GPLV",
378 .display_set = "SDSP",
379 .display_get = "\\ADVG"},
380
381 {
382 .name = "W3V",
383 .mt_mled = "MLED",
384 .mt_wled = "WLED",
385 .mt_lcd_switch = xxN_PREFIX "_Q10",
386 .lcd_status = "\\BKLT",
387 .brightness_set = "SPLV",
388 .brightness_get = "GPLV",
389 .display_set = "SDSP",
390 .display_get = "\\INFB"},
391
392 {
393 .name = "xxN",
394 .mt_mled = "MLED",
395 /* WLED present, but not controlled by ACPI */
396 .mt_lcd_switch = xxN_PREFIX "_Q10",
397 .lcd_status = "\\BKLT",
398 .brightness_set = "SPLV",
399 .brightness_get = "GPLV",
400 .display_set = "SDSP",
401 .display_get = "\\ADVG"},
402
403 {
404 .name = "A4S",
405 .brightness_set = "SPLV",
406 .brightness_get = "GPLV",
407 .mt_bt_switch = "BLED",
408 .mt_wled = "WLED"
409 },
410
411 {
412 .name = "F3Sa",
413 .mt_bt_switch = "BLED",
414 .mt_wled = "WLED",
415 .mt_mled = "MLED",
416 .brightness_get = "GPLV",
417 .brightness_set = "SPLV",
418 .mt_lcd_switch = "\\_SB.PCI0.SBRG.EC0._Q10",
419 .lcd_status = "\\_SB.PCI0.SBRG.EC0.RPIN",
420 .display_get = "\\ADVG",
421 .display_set = "SDSP",
422 },
423
424 };
425
426 /* procdir we use */
427 static struct proc_dir_entry *asus_proc_dir;
428
429 static struct backlight_device *asus_backlight_device;
430
431 /*
432 * This header is made available to allow proper configuration given model,
433 * revision number , ... this info cannot go in struct asus_hotk because it is
434 * available before the hotk
435 */
436 static struct acpi_table_header *asus_info;
437
438 /* The actual device the driver binds to */
439 static struct asus_hotk *hotk;
440
441 /*
442 * The hotkey driver and autoloading declaration
443 */
444 static int asus_hotk_add(struct acpi_device *device);
445 static int asus_hotk_remove(struct acpi_device *device, int type);
446 static const struct acpi_device_id asus_device_ids[] = {
447 {"ATK0100", 0},
448 {"", 0},
449 };
450 MODULE_DEVICE_TABLE(acpi, asus_device_ids);
451
452 static struct acpi_driver asus_hotk_driver = {
453 .name = "asus_acpi",
454 .class = ACPI_HOTK_CLASS,
455 .ids = asus_device_ids,
456 .ops = {
457 .add = asus_hotk_add,
458 .remove = asus_hotk_remove,
459 },
460 };
461
462 /*
463 * This function evaluates an ACPI method, given an int as parameter, the
464 * method is searched within the scope of the handle, can be NULL. The output
465 * of the method is written is output, which can also be NULL
466 *
467 * returns 1 if write is successful, 0 else.
468 */
469 static int write_acpi_int(acpi_handle handle, const char *method, int val,
470 struct acpi_buffer *output)
471 {
472 struct acpi_object_list params; //list of input parameters (an int here)
473 union acpi_object in_obj; //the only param we use
474 acpi_status status;
475
476 params.count = 1;
477 params.pointer = &in_obj;
478 in_obj.type = ACPI_TYPE_INTEGER;
479 in_obj.integer.value = val;
480
481 status = acpi_evaluate_object(handle, (char *)method, &params, output);
482 return (status == AE_OK);
483 }
484
485 static int read_acpi_int(acpi_handle handle, const char *method, int *val)
486 {
487 struct acpi_buffer output;
488 union acpi_object out_obj;
489 acpi_status status;
490
491 output.length = sizeof(out_obj);
492 output.pointer = &out_obj;
493
494 status = acpi_evaluate_object(handle, (char *)method, NULL, &output);
495 *val = out_obj.integer.value;
496 return (status == AE_OK) && (out_obj.type == ACPI_TYPE_INTEGER);
497 }
498
499 /*
500 * We write our info in page, we begin at offset off and cannot write more
501 * than count bytes. We set eof to 1 if we handle those 2 values. We return the
502 * number of bytes written in page
503 */
504 static int
505 proc_read_info(char *page, char **start, off_t off, int count, int *eof,
506 void *data)
507 {
508 int len = 0;
509 int temp;
510 char buf[16]; //enough for all info
511 /*
512 * We use the easy way, we don't care of off and count, so we don't set eof
513 * to 1
514 */
515
516 len += sprintf(page, ACPI_HOTK_NAME " " ASUS_ACPI_VERSION "\n");
517 len += sprintf(page + len, "Model reference : %s\n",
518 hotk->methods->name);
519 /*
520 * The SFUN method probably allows the original driver to get the list
521 * of features supported by a given model. For now, 0x0100 or 0x0800
522 * bit signifies that the laptop is equipped with a Wi-Fi MiniPCI card.
523 * The significance of others is yet to be found.
524 */
525 if (read_acpi_int(hotk->handle, "SFUN", &temp))
526 len +=
527 sprintf(page + len, "SFUN value : 0x%04x\n", temp);
528 /*
529 * Another value for userspace: the ASYM method returns 0x02 for
530 * battery low and 0x04 for battery critical, its readings tend to be
531 * more accurate than those provided by _BST.
532 * Note: since not all the laptops provide this method, errors are
533 * silently ignored.
534 */
535 if (read_acpi_int(hotk->handle, "ASYM", &temp))
536 len +=
537 sprintf(page + len, "ASYM value : 0x%04x\n", temp);
538 if (asus_info) {
539 snprintf(buf, 16, "%d", asus_info->length);
540 len += sprintf(page + len, "DSDT length : %s\n", buf);
541 snprintf(buf, 16, "%d", asus_info->checksum);
542 len += sprintf(page + len, "DSDT checksum : %s\n", buf);
543 snprintf(buf, 16, "%d", asus_info->revision);
544 len += sprintf(page + len, "DSDT revision : %s\n", buf);
545 snprintf(buf, 7, "%s", asus_info->oem_id);
546 len += sprintf(page + len, "OEM id : %s\n", buf);
547 snprintf(buf, 9, "%s", asus_info->oem_table_id);
548 len += sprintf(page + len, "OEM table id : %s\n", buf);
549 snprintf(buf, 16, "%x", asus_info->oem_revision);
550 len += sprintf(page + len, "OEM revision : 0x%s\n", buf);
551 snprintf(buf, 5, "%s", asus_info->asl_compiler_id);
552 len += sprintf(page + len, "ASL comp vendor id : %s\n", buf);
553 snprintf(buf, 16, "%x", asus_info->asl_compiler_revision);
554 len += sprintf(page + len, "ASL comp revision : 0x%s\n", buf);
555 }
556
557 return len;
558 }
559
560 /*
561 * /proc handlers
562 * We write our info in page, we begin at offset off and cannot write more
563 * than count bytes. We set eof to 1 if we handle those 2 values. We return the
564 * number of bytes written in page
565 */
566
567 /* Generic LED functions */
568 static int read_led(const char *ledname, int ledmask)
569 {
570 if (ledname) {
571 int led_status;
572
573 if (read_acpi_int(NULL, ledname, &led_status))
574 return led_status;
575 else
576 printk(KERN_WARNING "Asus ACPI: Error reading LED "
577 "status\n");
578 }
579 return (hotk->status & ledmask) ? 1 : 0;
580 }
581
582 static int parse_arg(const char __user * buf, unsigned long count, int *val)
583 {
584 char s[32];
585 if (!count)
586 return 0;
587 if (count > 31)
588 return -EINVAL;
589 if (copy_from_user(s, buf, count))
590 return -EFAULT;
591 s[count] = 0;
592 if (sscanf(s, "%i", val) != 1)
593 return -EINVAL;
594 return count;
595 }
596
597 /* FIXME: kill extraneous args so it can be called independently */
598 static int
599 write_led(const char __user * buffer, unsigned long count,
600 char *ledname, int ledmask, int invert)
601 {
602 int rv, value;
603 int led_out = 0;
604
605 rv = parse_arg(buffer, count, &value);
606 if (rv > 0)
607 led_out = value ? 1 : 0;
608
609 hotk->status =
610 (led_out) ? (hotk->status | ledmask) : (hotk->status & ~ledmask);
611
612 if (invert) /* invert target value */
613 <<<<<<< HEAD:drivers/acpi/asus_acpi.c
614 led_out = !led_out & 0x1;
615 =======
616 led_out = !led_out;
617 >>>>>>> 264e3e889d86e552b4191d69bb60f4f3b383135a:drivers/acpi/asus_acpi.c
618
619 if (!write_acpi_int(hotk->handle, ledname, led_out, NULL))
620 printk(KERN_WARNING "Asus ACPI: LED (%s) write failed\n",
621 ledname);
622
623 return rv;
624 }
625
626 /*
627 * Proc handlers for MLED
628 */
629 static int
630 proc_read_mled(char *page, char **start, off_t off, int count, int *eof,
631 void *data)
632 {
633 return sprintf(page, "%d\n",
634 read_led(hotk->methods->mled_status, MLED_ON));
635 }
636
637 static int
638 proc_write_mled(struct file *file, const char __user * buffer,
639 unsigned long count, void *data)
640 {
641 return write_led(buffer, count, hotk->methods->mt_mled, MLED_ON, 1);
642 }
643
644 /*
645 * Proc handlers for LED display
646 */
647 static int
648 proc_read_ledd(char *page, char **start, off_t off, int count, int *eof,
649 void *data)
650 {
651 return sprintf(page, "0x%08x\n", hotk->ledd_status);
652 }
653
654 static int
655 proc_write_ledd(struct file *file, const char __user * buffer,
656 unsigned long count, void *data)
657 {
658 int rv, value;
659
660 rv = parse_arg(buffer, count, &value);
661 if (rv > 0) {
662 if (!write_acpi_int
663 (hotk->handle, hotk->methods->mt_ledd, value, NULL))
664 printk(KERN_WARNING
665 "Asus ACPI: LED display write failed\n");
666 else
667 hotk->ledd_status = (u32) value;
668 }
669 return rv;
670 }
671
672 /*
673 * Proc handlers for WLED
674 */
675 static int
676 proc_read_wled(char *page, char **start, off_t off, int count, int *eof,
677 void *data)
678 {
679 return sprintf(page, "%d\n",
680 read_led(hotk->methods->wled_status, WLED_ON));
681 }
682
683 static int
684 proc_write_wled(struct file *file, const char __user * buffer,
685 unsigned long count, void *data)
686 {
687 return write_led(buffer, count, hotk->methods->mt_wled, WLED_ON, 0);
688 }
689
690 /*
691 * Proc handlers for Bluetooth
692 */
693 static int
694 proc_read_bluetooth(char *page, char **start, off_t off, int count, int *eof,
695 void *data)
696 {
697 return sprintf(page, "%d\n", read_led(hotk->methods->bt_status, BT_ON));
698 }
699
700 static int
701 proc_write_bluetooth(struct file *file, const char __user * buffer,
702 unsigned long count, void *data)
703 {
704 /* Note: mt_bt_switch controls both internal Bluetooth adapter's
705 presence and its LED */
706 return write_led(buffer, count, hotk->methods->mt_bt_switch, BT_ON, 0);
707 }
708
709 /*
710 * Proc handlers for TLED
711 */
712 static int
713 proc_read_tled(char *page, char **start, off_t off, int count, int *eof,
714 void *data)
715 {
716 return sprintf(page, "%d\n",
717 read_led(hotk->methods->tled_status, TLED_ON));
718 }
719
720 static int
721 proc_write_tled(struct file *file, const char __user * buffer,
722 unsigned long count, void *data)
723 {
724 return write_led(buffer, count, hotk->methods->mt_tled, TLED_ON, 0);
725 }
726
727 static int get_lcd_state(void)
728 {
729 int lcd = 0;
730
731 if (hotk->model == L3H) {
732 /* L3H and the like have to be handled differently */
733 acpi_status status = 0;
734 struct acpi_object_list input;
735 union acpi_object mt_params[2];
736 struct acpi_buffer output;
737 union acpi_object out_obj;
738
739 input.count = 2;
740 input.pointer = mt_params;
741 /* Note: the following values are partly guessed up, but
742 otherwise they seem to work */
743 mt_params[0].type = ACPI_TYPE_INTEGER;
744 mt_params[0].integer.value = 0x02;
745 mt_params[1].type = ACPI_TYPE_INTEGER;
746 mt_params[1].integer.value = 0x02;
747
748 output.length = sizeof(out_obj);
749 output.pointer = &out_obj;
750
751 status =
752 acpi_evaluate_object(NULL, hotk->methods->lcd_status,
753 &input, &output);
754 if (status != AE_OK)
755 return -1;
756 if (out_obj.type == ACPI_TYPE_INTEGER)
757 /* That's what the AML code does */
758 lcd = out_obj.integer.value >> 8;
759 } else if (hotk->model == F3Sa) {
760 unsigned long tmp;
761 union acpi_object param;
762 struct acpi_object_list input;
763 acpi_status status;
764
765 /* Read pin 11 */
766 param.type = ACPI_TYPE_INTEGER;
767 param.integer.value = 0x11;
768 input.count = 1;
769 input.pointer = &param;
770
771 status = acpi_evaluate_integer(NULL, hotk->methods->lcd_status,
772 &input, &tmp);
773 if (status != AE_OK)
774 return -1;
775
776 lcd = tmp;
777 } else {
778 /* We don't have to check anything if we are here */
779 if (!read_acpi_int(NULL, hotk->methods->lcd_status, &lcd))
780 printk(KERN_WARNING
781 "Asus ACPI: Error reading LCD status\n");
782
783 if (hotk->model == L2D)
784 lcd = ~lcd;
785 }
786
787 return (lcd & 1);
788 }
789
790 static int set_lcd_state(int value)
791 {
792 int lcd = 0;
793 acpi_status status = 0;
794
795 lcd = value ? 1 : 0;
796 if (lcd != get_lcd_state()) {
797 /* switch */
798 if (hotk->model != L3H) {
799 status =
800 acpi_evaluate_object(NULL,
801 hotk->methods->mt_lcd_switch,
802 NULL, NULL);
803 } else { /* L3H and the like have to be handled differently */
804 if (!write_acpi_int
805 (hotk->handle, hotk->methods->mt_lcd_switch, 0x07,
806 NULL))
807 status = AE_ERROR;
808 /* L3H's AML executes EHK (0x07) upon Fn+F7 keypress,
809 the exact behaviour is simulated here */
810 }
811 if (ACPI_FAILURE(status))
812 printk(KERN_WARNING "Asus ACPI: Error switching LCD\n");
813 }
814 return 0;
815
816 }
817
818 static int
819 proc_read_lcd(char *page, char **start, off_t off, int count, int *eof,
820 void *data)
821 {
822 return sprintf(page, "%d\n", get_lcd_state());
823 }
824
825 static int
826 proc_write_lcd(struct file *file, const char __user * buffer,
827 unsigned long count, void *data)
828 {
829 int rv, value;
830
831 rv = parse_arg(buffer, count, &value);
832 if (rv > 0)
833 set_lcd_state(value);
834 return rv;
835 }
836
837 static int read_brightness(struct backlight_device *bd)
838 {
839 int value;
840
841 if (hotk->methods->brightness_get) { /* SPLV/GPLV laptop */
842 if (!read_acpi_int(hotk->handle, hotk->methods->brightness_get,
843 &value))
844 printk(KERN_WARNING
845 "Asus ACPI: Error reading brightness\n");
846 } else if (hotk->methods->brightness_status) { /* For D1 for example */
847 if (!read_acpi_int(NULL, hotk->methods->brightness_status,
848 &value))
849 printk(KERN_WARNING
850 "Asus ACPI: Error reading brightness\n");
851 } else /* No GPLV method */
852 value = hotk->brightness;
853 return value;
854 }
855
856 /*
857 * Change the brightness level
858 */
859 static int set_brightness(int value)
860 {
861 acpi_status status = 0;
862 int ret = 0;
863
864 /* SPLV laptop */
865 if (hotk->methods->brightness_set) {
866 if (!write_acpi_int(hotk->handle, hotk->methods->brightness_set,
867 value, NULL))
868 printk(KERN_WARNING
869 "Asus ACPI: Error changing brightness\n");
870 ret = -EIO;
871 goto out;
872 }
873
874 /* No SPLV method if we are here, act as appropriate */
875 value -= read_brightness(NULL);
876 while (value != 0) {
877 status = acpi_evaluate_object(NULL, (value > 0) ?
878 hotk->methods->brightness_up :
879 hotk->methods->brightness_down,
880 NULL, NULL);
881 (value > 0) ? value-- : value++;
882 if (ACPI_FAILURE(status))
883 printk(KERN_WARNING
884 "Asus ACPI: Error changing brightness\n");
885 ret = -EIO;
886 }
887 out:
888 return ret;
889 }
890
891 static int set_brightness_status(struct backlight_device *bd)
892 {
893 return set_brightness(bd->props.brightness);
894 }
895
896 static int
897 proc_read_brn(char *page, char **start, off_t off, int count, int *eof,
898 void *data)
899 {
900 return sprintf(page, "%d\n", read_brightness(NULL));
901 }
902
903 static int
904 proc_write_brn(struct file *file, const char __user * buffer,
905 unsigned long count, void *data)
906 {
907 int rv, value;
908
909 rv = parse_arg(buffer, count, &value);
910 if (rv > 0) {
911 value = (0 < value) ? ((15 < value) ? 15 : value) : 0;
912 /* 0 <= value <= 15 */
913 set_brightness(value);
914 }
915 return rv;
916 }
917
918 static void set_display(int value)
919 {
920 /* no sanity check needed for now */
921 if (!write_acpi_int(hotk->handle, hotk->methods->display_set,
922 value, NULL))
923 printk(KERN_WARNING "Asus ACPI: Error setting display\n");
924 return;
925 }
926
927 /*
928 * Now, *this* one could be more user-friendly, but so far, no-one has
929 * complained. The significance of bits is the same as in proc_write_disp()
930 */
931 static int
932 proc_read_disp(char *page, char **start, off_t off, int count, int *eof,
933 void *data)
934 {
935 int value = 0;
936
937 if (!read_acpi_int(hotk->handle, hotk->methods->display_get, &value))
938 printk(KERN_WARNING
939 "Asus ACPI: Error reading display status\n");
940 value &= 0x07; /* needed for some models, shouldn't hurt others */
941 return sprintf(page, "%d\n", value);
942 }
943
944 /*
945 * Experimental support for display switching. As of now: 1 should activate
946 * the LCD output, 2 should do for CRT, and 4 for TV-Out. Any combination
947 * (bitwise) of these will suffice. I never actually tested 3 displays hooked up
948 * simultaneously, so be warned. See the acpi4asus README for more info.
949 */
950 static int
951 proc_write_disp(struct file *file, const char __user * buffer,
952 unsigned long count, void *data)
953 {
954 int rv, value;
955
956 rv = parse_arg(buffer, count, &value);
957 if (rv > 0)
958 set_display(value);
959 return rv;
960 }
961
962 typedef int (proc_readfunc) (char *page, char **start, off_t off, int count,
963 int *eof, void *data);
964 typedef int (proc_writefunc) (struct file * file, const char __user * buffer,
965 unsigned long count, void *data);
966
967 static int
968 asus_proc_add(char *name, proc_writefunc * writefunc,
969 proc_readfunc * readfunc, mode_t mode,
970 struct acpi_device *device)
971 {
972 struct proc_dir_entry *proc =
973 create_proc_entry(name, mode, acpi_device_dir(device));
974 if (!proc) {
975 printk(KERN_WARNING " Unable to create %s fs entry\n", name);
976 return -1;
977 }
978 proc->write_proc = writefunc;
979 proc->read_proc = readfunc;
980 proc->data = acpi_driver_data(device);
981 proc->owner = THIS_MODULE;
982 proc->uid = asus_uid;
983 proc->gid = asus_gid;
984 return 0;
985 }
986
987 static int asus_hotk_add_fs(struct acpi_device *device)
988 {
989 struct proc_dir_entry *proc;
990 mode_t mode;
991
992 /*
993 * If parameter uid or gid is not changed, keep the default setting for
994 * our proc entries (-rw-rw-rw-) else, it means we care about security,
995 * and then set to -rw-rw----
996 */
997
998 if ((asus_uid == 0) && (asus_gid == 0)) {
999 mode = S_IFREG | S_IRUGO | S_IWUGO;
1000 } else {
1001 mode = S_IFREG | S_IRUSR | S_IRGRP | S_IWUSR | S_IWGRP;
1002 printk(KERN_WARNING " asus_uid and asus_gid parameters are "
1003 "deprecated, use chown and chmod instead!\n");
1004 }
1005
1006 acpi_device_dir(device) = asus_proc_dir;
1007 if (!acpi_device_dir(device))
1008 return -ENODEV;
1009
1010 proc = create_proc_entry(PROC_INFO, mode, acpi_device_dir(device));
1011 if (proc) {
1012 proc->read_proc = proc_read_info;
1013 proc->data = acpi_driver_data(device);
1014 proc->owner = THIS_MODULE;
1015 proc->uid = asus_uid;
1016 proc->gid = asus_gid;
1017 } else {
1018 printk(KERN_WARNING " Unable to create " PROC_INFO
1019 " fs entry\n");
1020 }
1021
1022 if (hotk->methods->mt_wled) {
1023 asus_proc_add(PROC_WLED, &proc_write_wled, &proc_read_wled,
1024 mode, device);
1025 }
1026
1027 if (hotk->methods->mt_ledd) {
1028 asus_proc_add(PROC_LEDD, &proc_write_ledd, &proc_read_ledd,
1029 mode, device);
1030 }
1031
1032 if (hotk->methods->mt_mled) {
1033 asus_proc_add(PROC_MLED, &proc_write_mled, &proc_read_mled,
1034 mode, device);
1035 }
1036
1037 if (hotk->methods->mt_tled) {
1038 asus_proc_add(PROC_TLED, &proc_write_tled, &proc_read_tled,
1039 mode, device);
1040 }
1041
1042 if (hotk->methods->mt_bt_switch) {
1043 asus_proc_add(PROC_BT, &proc_write_bluetooth,
1044 &proc_read_bluetooth, mode, device);
1045 }
1046
1047 /*
1048 * We need both read node and write method as LCD switch is also accessible
1049 * from keyboard
1050 */
1051 if (hotk->methods->mt_lcd_switch && hotk->methods->lcd_status) {
1052 asus_proc_add(PROC_LCD, &proc_write_lcd, &proc_read_lcd, mode,
1053 device);
1054 }
1055
1056 if ((hotk->methods->brightness_up && hotk->methods->brightness_down) ||
1057 (hotk->methods->brightness_get && hotk->methods->brightness_set)) {
1058 asus_proc_add(PROC_BRN, &proc_write_brn, &proc_read_brn, mode,
1059 device);
1060 }
1061
1062 if (hotk->methods->display_set) {
1063 asus_proc_add(PROC_DISP, &proc_write_disp, &proc_read_disp,
1064 mode, device);
1065 }
1066
1067 return 0;
1068 }
1069
1070 static int asus_hotk_remove_fs(struct acpi_device *device)
1071 {
1072 if (acpi_device_dir(device)) {
1073 remove_proc_entry(PROC_INFO, acpi_device_dir(device));
1074 if (hotk->methods->mt_wled)
1075 remove_proc_entry(PROC_WLED, acpi_device_dir(device));
1076 if (hotk->methods->mt_mled)
1077 remove_proc_entry(PROC_MLED, acpi_device_dir(device));
1078 if (hotk->methods->mt_tled)
1079 remove_proc_entry(PROC_TLED, acpi_device_dir(device));
1080 if (hotk->methods->mt_ledd)
1081 remove_proc_entry(PROC_LEDD, acpi_device_dir(device));
1082 if (hotk->methods->mt_bt_switch)
1083 remove_proc_entry(PROC_BT, acpi_device_dir(device));
1084 if (hotk->methods->mt_lcd_switch && hotk->methods->lcd_status)
1085 remove_proc_entry(PROC_LCD, acpi_device_dir(device));
1086 if ((hotk->methods->brightness_up
1087 && hotk->methods->brightness_down)
1088 || (hotk->methods->brightness_get
1089 && hotk->methods->brightness_set))
1090 remove_proc_entry(PROC_BRN, acpi_device_dir(device));
1091 if (hotk->methods->display_set)
1092 remove_proc_entry(PROC_DISP, acpi_device_dir(device));
1093 }
1094 return 0;
1095 }
1096
1097 static void asus_hotk_notify(acpi_handle handle, u32 event, void *data)
1098 {
1099 /* TODO Find a better way to handle events count. */
1100 if (!hotk)
1101 return;
1102
1103 if ((event & ~((u32) BR_UP)) < 16) {
1104 hotk->brightness = (event & ~((u32) BR_UP));
1105 } else if ((event & ~((u32) BR_DOWN)) < 16) {
1106 hotk->brightness = (event & ~((u32) BR_DOWN));
1107 }
1108
1109 acpi_bus_generate_proc_event(hotk->device, event,
1110 hotk->event_count[event % 128]++);
1111
1112 return;
1113 }
1114
1115 /*
1116 * Match the model string to the list of supported models. Return END_MODEL if
1117 * no match or model is NULL.
1118 */
1119 static int asus_model_match(char *model)
1120 {
1121 if (model == NULL)
1122 return END_MODEL;
1123
1124 if (strncmp(model, "L3D", 3) == 0)
1125 return L3D;
1126 else if (strncmp(model, "L2E", 3) == 0 ||
1127 strncmp(model, "L3H", 3) == 0 || strncmp(model, "L5D", 3) == 0)
1128 return L3H;
1129 else if (strncmp(model, "L3", 2) == 0 || strncmp(model, "L2B", 3) == 0)
1130 return L3C;
1131 else if (strncmp(model, "L8L", 3) == 0)
1132 return L8L;
1133 else if (strncmp(model, "L4R", 3) == 0)
1134 return L4R;
1135 else if (strncmp(model, "M6N", 3) == 0 || strncmp(model, "W3N", 3) == 0)
1136 return M6N;
1137 else if (strncmp(model, "M6R", 3) == 0 || strncmp(model, "A3G", 3) == 0)
1138 return M6R;
1139 else if (strncmp(model, "M2N", 3) == 0 ||
1140 strncmp(model, "M3N", 3) == 0 ||
1141 strncmp(model, "M5N", 3) == 0 ||
1142 strncmp(model, "M6N", 3) == 0 ||
1143 strncmp(model, "S1N", 3) == 0 ||
1144 strncmp(model, "S5N", 3) == 0 || strncmp(model, "W1N", 3) == 0)
1145 return xxN;
1146 else if (strncmp(model, "M1", 2) == 0)
1147 return M1A;
1148 else if (strncmp(model, "M2", 2) == 0 || strncmp(model, "L4E", 3) == 0)
1149 return M2E;
1150 else if (strncmp(model, "L2", 2) == 0)
1151 return L2D;
1152 else if (strncmp(model, "L8", 2) == 0)
1153 return S1x;
1154 else if (strncmp(model, "D1", 2) == 0)
1155 return D1x;
1156 else if (strncmp(model, "A1", 2) == 0)
1157 return A1x;
1158 else if (strncmp(model, "A2", 2) == 0)
1159 return A2x;
1160 else if (strncmp(model, "J1", 2) == 0)
1161 return S2x;
1162 else if (strncmp(model, "L5", 2) == 0)
1163 return L5x;
1164 else if (strncmp(model, "A4G", 3) == 0)
1165 return A4G;
1166 else if (strncmp(model, "W1N", 3) == 0)
1167 return W1N;
1168 else if (strncmp(model, "W3V", 3) == 0)
1169 return W3V;
1170 else if (strncmp(model, "W5A", 3) == 0)
1171 return W5A;
1172 else if (strncmp(model, "A4S", 3) == 0)
1173 return A4S;
1174 else if (strncmp(model, "F3Sa", 4) == 0)
1175 return F3Sa;
1176 else
1177 return END_MODEL;
1178 }
1179
1180 /*
1181 * This function is used to initialize the hotk with right values. In this
1182 * method, we can make all the detection we want, and modify the hotk struct
1183 */
1184 static int asus_hotk_get_info(void)
1185 {
1186 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
1187 union acpi_object *model = NULL;
1188 int bsts_result;
1189 char *string = NULL;
1190 acpi_status status;
1191
1192 /*
1193 * Get DSDT headers early enough to allow for differentiating between
1194 * models, but late enough to allow acpi_bus_register_driver() to fail
1195 * before doing anything ACPI-specific. Should we encounter a machine,
1196 * which needs special handling (i.e. its hotkey device has a different
1197 * HID), this bit will be moved. A global variable asus_info contains
1198 * the DSDT header.
1199 */
1200 status = acpi_get_table(ACPI_SIG_DSDT, 1, &asus_info);
1201 if (ACPI_FAILURE(status))
1202 printk(KERN_WARNING " Couldn't get the DSDT table header\n");
1203
1204 /* We have to write 0 on init this far for all ASUS models */
1205 if (!write_acpi_int(hotk->handle, "INIT", 0, &buffer)) {
1206 printk(KERN_ERR " Hotkey initialization failed\n");
1207 return -ENODEV;
1208 }
1209
1210 /* This needs to be called for some laptops to init properly */
1211 if (!read_acpi_int(hotk->handle, "BSTS", &bsts_result))
1212 printk(KERN_WARNING " Error calling BSTS\n");
1213 else if (bsts_result)
1214 printk(KERN_NOTICE " BSTS called, 0x%02x returned\n",
1215 bsts_result);
1216
1217 /*
1218 * Try to match the object returned by INIT to the specific model.
1219 * Handle every possible object (or the lack of thereof) the DSDT
1220 * writers might throw at us. When in trouble, we pass NULL to
1221 * asus_model_match() and try something completely different.
1222 */
1223 if (buffer.pointer) {
1224 model = buffer.pointer;
1225 switch (model->type) {
1226 case ACPI_TYPE_STRING:
1227 string = model->string.pointer;
1228 break;
1229 case ACPI_TYPE_BUFFER:
1230 string = model->buffer.pointer;
1231 break;
1232 default:
1233 kfree(model);
1234 model = NULL;
1235 break;
1236 }
1237 }
1238 hotk->model = asus_model_match(string);
1239 if (hotk->model == END_MODEL) { /* match failed */
1240 if (asus_info &&
1241 strncmp(asus_info->oem_table_id, "ODEM", 4) == 0) {
1242 hotk->model = P30;
1243 printk(KERN_NOTICE
1244 " Samsung P30 detected, supported\n");
1245 } else {
1246 hotk->model = M2E;
1247 printk(KERN_NOTICE " unsupported model %s, trying "
1248 "default values\n", string);
1249 printk(KERN_NOTICE
1250 " send /proc/acpi/dsdt to the developers\n");
1251 }
1252 hotk->methods = &model_conf[hotk->model];
1253 return AE_OK;
1254 }
1255 hotk->methods = &model_conf[hotk->model];
1256 printk(KERN_NOTICE " %s model detected, supported\n", string);
1257
1258 /* Sort of per-model blacklist */
1259 if (strncmp(string, "L2B", 3) == 0)
1260 hotk->methods->lcd_status = NULL;
1261 /* L2B is similar enough to L3C to use its settings, with this only
1262 exception */
1263 else if (strncmp(string, "A3G", 3) == 0)
1264 hotk->methods->lcd_status = "\\BLFG";
1265 /* A3G is like M6R */
1266 else if (strncmp(string, "S5N", 3) == 0 ||
1267 strncmp(string, "M5N", 3) == 0 ||
1268 strncmp(string, "W3N", 3) == 0)
1269 hotk->methods->mt_mled = NULL;
1270 /* S5N, M5N and W3N have no MLED */
1271 else if (strncmp(string, "L5D", 3) == 0)
1272 hotk->methods->mt_wled = NULL;
1273 /* L5D's WLED is not controlled by ACPI */
1274 else if (strncmp(string, "M2N", 3) == 0 ||
1275 strncmp(string, "W3V", 3) == 0 ||
1276 strncmp(string, "S1N", 3) == 0)
1277 hotk->methods->mt_wled = "WLED";
1278 /* M2N, S1N and W3V have a usable WLED */
1279 else if (asus_info) {
1280 if (strncmp(asus_info->oem_table_id, "L1", 2) == 0)
1281 hotk->methods->mled_status = NULL;
1282 /* S1300A reports L84F, but L1400B too, account for that */
1283 }
1284
1285 kfree(model);
1286
1287 return AE_OK;
1288 }
1289
1290 static int asus_hotk_check(void)
1291 {
1292 int result = 0;
1293
1294 result = acpi_bus_get_status(hotk->device);
1295 if (result)
1296 return result;
1297
1298 if (hotk->device->status.present) {
1299 result = asus_hotk_get_info();
1300 } else {
1301 printk(KERN_ERR " Hotkey device not present, aborting\n");
1302 return -EINVAL;
1303 }
1304
1305 return result;
1306 }
1307
1308 static int asus_hotk_found;
1309
1310 static int asus_hotk_add(struct acpi_device *device)
1311 {
1312 acpi_status status = AE_OK;
1313 int result;
1314
1315 if (!device)
1316 return -EINVAL;
1317
1318 printk(KERN_NOTICE "Asus Laptop ACPI Extras version %s\n",
1319 ASUS_ACPI_VERSION);
1320
1321 hotk = kzalloc(sizeof(struct asus_hotk), GFP_KERNEL);
1322 if (!hotk)
1323 return -ENOMEM;
1324
1325 hotk->handle = device->handle;
1326 strcpy(acpi_device_name(device), ACPI_HOTK_DEVICE_NAME);
1327 strcpy(acpi_device_class(device), ACPI_HOTK_CLASS);
1328 acpi_driver_data(device) = hotk;
1329 hotk->device = device;
1330
1331 result = asus_hotk_check();
1332 if (result)
1333 goto end;
1334
1335 result = asus_hotk_add_fs(device);
1336 if (result)
1337 goto end;
1338
1339 /*
1340 * We install the handler, it will receive the hotk in parameter, so, we
1341 * could add other data to the hotk struct
1342 */
1343 status = acpi_install_notify_handler(hotk->handle, ACPI_SYSTEM_NOTIFY,
1344 asus_hotk_notify, hotk);
1345 if (ACPI_FAILURE(status))
1346 printk(KERN_ERR " Error installing notify handler\n");
1347
1348 /* For laptops without GPLV: init the hotk->brightness value */
1349 if ((!hotk->methods->brightness_get)
1350 && (!hotk->methods->brightness_status)
1351 && (hotk->methods->brightness_up && hotk->methods->brightness_down)) {
1352 status =
1353 acpi_evaluate_object(NULL, hotk->methods->brightness_down,
1354 NULL, NULL);
1355 if (ACPI_FAILURE(status))
1356 printk(KERN_WARNING " Error changing brightness\n");
1357 else {
1358 status =
1359 acpi_evaluate_object(NULL,
1360 hotk->methods->brightness_up,
1361 NULL, NULL);
1362 if (ACPI_FAILURE(status))
1363 printk(KERN_WARNING " Strange, error changing"
1364 " brightness\n");
1365 }
1366 }
1367
1368 asus_hotk_found = 1;
1369
1370 /* LED display is off by default */
1371 hotk->ledd_status = 0xFFF;
1372
1373 end:
1374 if (result) {
1375 kfree(hotk);
1376 }
1377
1378 return result;
1379 }
1380
1381 static int asus_hotk_remove(struct acpi_device *device, int type)
1382 {
1383 acpi_status status = 0;
1384
1385 if (!device || !acpi_driver_data(device))
1386 return -EINVAL;
1387
1388 status = acpi_remove_notify_handler(hotk->handle, ACPI_SYSTEM_NOTIFY,
1389 asus_hotk_notify);
1390 if (ACPI_FAILURE(status))
1391 printk(KERN_ERR "Asus ACPI: Error removing notify handler\n");
1392
1393 asus_hotk_remove_fs(device);
1394
1395 kfree(hotk);
1396
1397 return 0;
1398 }
1399
1400 static struct backlight_ops asus_backlight_data = {
1401 .get_brightness = read_brightness,
1402 .update_status = set_brightness_status,
1403 };
1404
1405 static void asus_acpi_exit(void)
1406 {
1407 if (asus_backlight_device)
1408 backlight_device_unregister(asus_backlight_device);
1409
1410 acpi_bus_unregister_driver(&asus_hotk_driver);
1411 remove_proc_entry(PROC_ASUS, acpi_root_dir);
1412
1413 return;
1414 }
1415
1416 static int __init asus_acpi_init(void)
1417 {
1418 int result;
1419
1420 if (acpi_disabled)
1421 return -ENODEV;
1422
1423 asus_proc_dir = proc_mkdir(PROC_ASUS, acpi_root_dir);
1424 if (!asus_proc_dir) {
1425 printk(KERN_ERR "Asus ACPI: Unable to create /proc entry\n");
1426 return -ENODEV;
1427 }
1428 asus_proc_dir->owner = THIS_MODULE;
1429
1430 result = acpi_bus_register_driver(&asus_hotk_driver);
1431 if (result < 0) {
1432 remove_proc_entry(PROC_ASUS, acpi_root_dir);
1433 return result;
1434 }
1435
1436 /*
1437 * This is a bit of a kludge. We only want this module loaded
1438 * for ASUS systems, but there's currently no way to probe the
1439 * ACPI namespace for ASUS HIDs. So we just return failure if
1440 * we didn't find one, which will cause the module to be
1441 * unloaded.
1442 */
1443 if (!asus_hotk_found) {
1444 acpi_bus_unregister_driver(&asus_hotk_driver);
1445 remove_proc_entry(PROC_ASUS, acpi_root_dir);
1446 return -ENODEV;
1447 }
1448
1449 asus_backlight_device = backlight_device_register("asus",NULL,NULL,
1450 &asus_backlight_data);
1451 if (IS_ERR(asus_backlight_device)) {
1452 printk(KERN_ERR "Could not register asus backlight device\n");
1453 asus_backlight_device = NULL;
1454 asus_acpi_exit();
1455 return -ENODEV;
1456 }
1457 asus_backlight_device->props.max_brightness = 15;
1458
1459 return 0;
1460 }
1461
1462 module_init(asus_acpi_init);
1463 module_exit(asus_acpi_exit);
WRT350N Kernel Patches