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[PATCH] scsi: kill overeager "not-ready" messages
[linux-2.6.22.y-op.git] / drivers / acpi / asus_acpi.c
blobe9ee4c52a5f6266a7edc5df20d80aad2647338ea
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 * Éric 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 <acpi/acpi_drivers.h>
39 #include <acpi/acpi_bus.h>
40 #include <asm/uaccess.h>
41
42 #define ASUS_ACPI_VERSION "0.30"
43
44 #define PROC_ASUS "asus" //the directory
45 #define PROC_MLED "mled"
46 #define PROC_WLED "wled"
47 #define PROC_TLED "tled"
48 #define PROC_BT "bluetooth"
49 #define PROC_LEDD "ledd"
50 #define PROC_INFO "info"
51 #define PROC_LCD "lcd"
52 #define PROC_BRN "brn"
53 #define PROC_DISP "disp"
54
55 #define ACPI_HOTK_NAME "Asus Laptop ACPI Extras Driver"
56 #define ACPI_HOTK_CLASS "hotkey"
57 #define ACPI_HOTK_DEVICE_NAME "Hotkey"
58 #define ACPI_HOTK_HID "ATK0100"
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 xxN, //M2400N, M3700N, M5200N, M6800N, S1300N, S5200N
142 //(Centrino)
143 END_MODEL
144 } model; //Models currently supported
145 u16 event_count[128]; //count for each event TODO make this better
146 };
147
148 /* Here we go */
149 #define A1x_PREFIX "\\_SB.PCI0.ISA.EC0."
150 #define L3C_PREFIX "\\_SB.PCI0.PX40.ECD0."
151 #define M1A_PREFIX "\\_SB.PCI0.PX40.EC0."
152 #define P30_PREFIX "\\_SB.PCI0.LPCB.EC0."
153 #define S1x_PREFIX "\\_SB.PCI0.PX40."
154 #define S2x_PREFIX A1x_PREFIX
155 #define xxN_PREFIX "\\_SB.PCI0.SBRG.EC0."
156
157 static struct model_data model_conf[END_MODEL] = {
158 /*
159 * TODO I have seen a SWBX and AIBX method on some models, like L1400B,
160 * it seems to be a kind of switch, but what for ?
161 */
162
163 {
164 .name = "A1x",
165 .mt_mled = "MLED",
166 .mled_status = "\\MAIL",
167 .mt_lcd_switch = A1x_PREFIX "_Q10",
168 .lcd_status = "\\BKLI",
169 .brightness_up = A1x_PREFIX "_Q0E",
170 .brightness_down = A1x_PREFIX "_Q0F"},
171
172 {
173 .name = "A2x",
174 .mt_mled = "MLED",
175 .mt_wled = "WLED",
176 .wled_status = "\\SG66",
177 .mt_lcd_switch = "\\Q10",
178 .lcd_status = "\\BAOF",
179 .brightness_set = "SPLV",
180 .brightness_get = "GPLV",
181 .display_set = "SDSP",
182 .display_get = "\\INFB"},
183
184 {
185 .name = "A4G",
186 .mt_mled = "MLED",
187 /* WLED present, but not controlled by ACPI */
188 .mt_lcd_switch = xxN_PREFIX "_Q10",
189 .brightness_set = "SPLV",
190 .brightness_get = "GPLV",
191 .display_set = "SDSP",
192 .display_get = "\\ADVG"},
193
194 {
195 .name = "D1x",
196 .mt_mled = "MLED",
197 .mt_lcd_switch = "\\Q0D",
198 .lcd_status = "\\GP11",
199 .brightness_up = "\\Q0C",
200 .brightness_down = "\\Q0B",
201 .brightness_status = "\\BLVL",
202 .display_set = "SDSP",
203 .display_get = "\\INFB"},
204
205 {
206 .name = "L2D",
207 .mt_mled = "MLED",
208 .mled_status = "\\SGP6",
209 .mt_wled = "WLED",
210 .wled_status = "\\RCP3",
211 .mt_lcd_switch = "\\Q10",
212 .lcd_status = "\\SGP0",
213 .brightness_up = "\\Q0E",
214 .brightness_down = "\\Q0F",
215 .display_set = "SDSP",
216 .display_get = "\\INFB"},
217
218 {
219 .name = "L3C",
220 .mt_mled = "MLED",
221 .mt_wled = "WLED",
222 .mt_lcd_switch = L3C_PREFIX "_Q10",
223 .lcd_status = "\\GL32",
224 .brightness_set = "SPLV",
225 .brightness_get = "GPLV",
226 .display_set = "SDSP",
227 .display_get = "\\_SB.PCI0.PCI1.VGAC.NMAP"},
228
229 {
230 .name = "L3D",
231 .mt_mled = "MLED",
232 .mled_status = "\\MALD",
233 .mt_wled = "WLED",
234 .mt_lcd_switch = "\\Q10",
235 .lcd_status = "\\BKLG",
236 .brightness_set = "SPLV",
237 .brightness_get = "GPLV",
238 .display_set = "SDSP",
239 .display_get = "\\INFB"},
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 .name = "L4R",
254 .mt_mled = "MLED",
255 .mt_wled = "WLED",
256 .wled_status = "\\_SB.PCI0.SBRG.SG13",
257 .mt_lcd_switch = xxN_PREFIX "_Q10",
258 .lcd_status = "\\_SB.PCI0.SBSM.SEO4",
259 .brightness_set = "SPLV",
260 .brightness_get = "GPLV",
261 .display_set = "SDSP",
262 .display_get = "\\_SB.PCI0.P0P1.VGA.GETD"},
263
264 {
265 .name = "L5x",
266 .mt_mled = "MLED",
267 /* WLED present, but not controlled by ACPI */
268 .mt_tled = "TLED",
269 .mt_lcd_switch = "\\Q0D",
270 .lcd_status = "\\BAOF",
271 .brightness_set = "SPLV",
272 .brightness_get = "GPLV",
273 .display_set = "SDSP",
274 .display_get = "\\INFB"},
275
276 {
277 .name = "L8L"
278 /* No features, but at least support the hotkeys */
279 },
280
281 {
282 .name = "M1A",
283 .mt_mled = "MLED",
284 .mt_lcd_switch = M1A_PREFIX "Q10",
285 .lcd_status = "\\PNOF",
286 .brightness_up = M1A_PREFIX "Q0E",
287 .brightness_down = M1A_PREFIX "Q0F",
288 .brightness_status = "\\BRIT",
289 .display_set = "SDSP",
290 .display_get = "\\INFB"},
291
292 {
293 .name = "M2E",
294 .mt_mled = "MLED",
295 .mt_wled = "WLED",
296 .mt_lcd_switch = "\\Q10",
297 .lcd_status = "\\GP06",
298 .brightness_set = "SPLV",
299 .brightness_get = "GPLV",
300 .display_set = "SDSP",
301 .display_get = "\\INFB"},
302
303 {
304 .name = "M6N",
305 .mt_mled = "MLED",
306 .mt_wled = "WLED",
307 .wled_status = "\\_SB.PCI0.SBRG.SG13",
308 .mt_lcd_switch = xxN_PREFIX "_Q10",
309 .lcd_status = "\\_SB.BKLT",
310 .brightness_set = "SPLV",
311 .brightness_get = "GPLV",
312 .display_set = "SDSP",
313 .display_get = "\\SSTE"},
314
315 {
316 .name = "M6R",
317 .mt_mled = "MLED",
318 .mt_wled = "WLED",
319 .mt_lcd_switch = xxN_PREFIX "_Q10",
320 .lcd_status = "\\_SB.PCI0.SBSM.SEO4",
321 .brightness_set = "SPLV",
322 .brightness_get = "GPLV",
323 .display_set = "SDSP",
324 .display_get = "\\_SB.PCI0.P0P1.VGA.GETD"},
325
326 {
327 .name = "P30",
328 .mt_wled = "WLED",
329 .mt_lcd_switch = P30_PREFIX "_Q0E",
330 .lcd_status = "\\BKLT",
331 .brightness_up = P30_PREFIX "_Q68",
332 .brightness_down = P30_PREFIX "_Q69",
333 .brightness_get = "GPLV",
334 .display_set = "SDSP",
335 .display_get = "\\DNXT"},
336
337 {
338 .name = "S1x",
339 .mt_mled = "MLED",
340 .mled_status = "\\EMLE",
341 .mt_wled = "WLED",
342 .mt_lcd_switch = S1x_PREFIX "Q10",
343 .lcd_status = "\\PNOF",
344 .brightness_set = "SPLV",
345 .brightness_get = "GPLV"},
346
347 {
348 .name = "S2x",
349 .mt_mled = "MLED",
350 .mled_status = "\\MAIL",
351 .mt_lcd_switch = S2x_PREFIX "_Q10",
352 .lcd_status = "\\BKLI",
353 .brightness_up = S2x_PREFIX "_Q0B",
354 .brightness_down = S2x_PREFIX "_Q0A"},
355
356 {
357 .name = "W1N",
358 .mt_mled = "MLED",
359 .mt_wled = "WLED",
360 .mt_ledd = "SLCM",
361 .mt_lcd_switch = xxN_PREFIX "_Q10",
362 .lcd_status = "\\BKLT",
363 .brightness_set = "SPLV",
364 .brightness_get = "GPLV",
365 .display_set = "SDSP",
366 .display_get = "\\ADVG"},
367
368 {
369 .name = "W5A",
370 .mt_bt_switch = "BLED",
371 .mt_wled = "WLED",
372 .mt_lcd_switch = xxN_PREFIX "_Q10",
373 .brightness_set = "SPLV",
374 .brightness_get = "GPLV",
375 .display_set = "SDSP",
376 .display_get = "\\ADVG"},
377
378 {
379 .name = "xxN",
380 .mt_mled = "MLED",
381 /* WLED present, but not controlled by ACPI */
382 .mt_lcd_switch = xxN_PREFIX "_Q10",
383 .lcd_status = "\\BKLT",
384 .brightness_set = "SPLV",
385 .brightness_get = "GPLV",
386 .display_set = "SDSP",
387 .display_get = "\\ADVG"}
388 };
389
390 /* procdir we use */
391 static struct proc_dir_entry *asus_proc_dir;
392
393 /*
394 * This header is made available to allow proper configuration given model,
395 * revision number , ... this info cannot go in struct asus_hotk because it is
396 * available before the hotk
397 */
398 static struct acpi_table_header *asus_info;
399
400 /* The actual device the driver binds to */
401 static struct asus_hotk *hotk;
402
403 /*
404 * The hotkey driver declaration
405 */
406 static int asus_hotk_add(struct acpi_device *device);
407 static int asus_hotk_remove(struct acpi_device *device, int type);
408 static struct acpi_driver asus_hotk_driver = {
409 .name = ACPI_HOTK_NAME,
410 .class = ACPI_HOTK_CLASS,
411 .ids = ACPI_HOTK_HID,
412 .ops = {
413 .add = asus_hotk_add,
414 .remove = asus_hotk_remove,
415 },
416 };
417
418 /*
419 * This function evaluates an ACPI method, given an int as parameter, the
420 * method is searched within the scope of the handle, can be NULL. The output
421 * of the method is written is output, which can also be NULL
422 *
423 * returns 1 if write is successful, 0 else.
424 */
425 static int write_acpi_int(acpi_handle handle, const char *method, int val,
426 struct acpi_buffer *output)
427 {
428 struct acpi_object_list params; //list of input parameters (an int here)
429 union acpi_object in_obj; //the only param we use
430 acpi_status status;
431
432 params.count = 1;
433 params.pointer = &in_obj;
434 in_obj.type = ACPI_TYPE_INTEGER;
435 in_obj.integer.value = val;
436
437 status = acpi_evaluate_object(handle, (char *)method, &params, output);
438 return (status == AE_OK);
439 }
440
441 static int read_acpi_int(acpi_handle handle, const char *method, int *val)
442 {
443 struct acpi_buffer output;
444 union acpi_object out_obj;
445 acpi_status status;
446
447 output.length = sizeof(out_obj);
448 output.pointer = &out_obj;
449
450 status = acpi_evaluate_object(handle, (char *)method, NULL, &output);
451 *val = out_obj.integer.value;
452 return (status == AE_OK) && (out_obj.type == ACPI_TYPE_INTEGER);
453 }
454
455 /*
456 * We write our info in page, we begin at offset off and cannot write more
457 * than count bytes. We set eof to 1 if we handle those 2 values. We return the
458 * number of bytes written in page
459 */
460 static int
461 proc_read_info(char *page, char **start, off_t off, int count, int *eof,
462 void *data)
463 {
464 int len = 0;
465 int temp;
466 char buf[16]; //enough for all info
467 /*
468 * We use the easy way, we don't care of off and count, so we don't set eof
469 * to 1
470 */
471
472 len += sprintf(page, ACPI_HOTK_NAME " " ASUS_ACPI_VERSION "\n");
473 len += sprintf(page + len, "Model reference : %s\n",
474 hotk->methods->name);
475 /*
476 * The SFUN method probably allows the original driver to get the list
477 * of features supported by a given model. For now, 0x0100 or 0x0800
478 * bit signifies that the laptop is equipped with a Wi-Fi MiniPCI card.
479 * The significance of others is yet to be found.
480 */
481 if (read_acpi_int(hotk->handle, "SFUN", &temp))
482 len +=
483 sprintf(page + len, "SFUN value : 0x%04x\n", temp);
484 /*
485 * Another value for userspace: the ASYM method returns 0x02 for
486 * battery low and 0x04 for battery critical, its readings tend to be
487 * more accurate than those provided by _BST.
488 * Note: since not all the laptops provide this method, errors are
489 * silently ignored.
490 */
491 if (read_acpi_int(hotk->handle, "ASYM", &temp))
492 len +=
493 sprintf(page + len, "ASYM value : 0x%04x\n", temp);
494 if (asus_info) {
495 snprintf(buf, 16, "%d", asus_info->length);
496 len += sprintf(page + len, "DSDT length : %s\n", buf);
497 snprintf(buf, 16, "%d", asus_info->checksum);
498 len += sprintf(page + len, "DSDT checksum : %s\n", buf);
499 snprintf(buf, 16, "%d", asus_info->revision);
500 len += sprintf(page + len, "DSDT revision : %s\n", buf);
501 snprintf(buf, 7, "%s", asus_info->oem_id);
502 len += sprintf(page + len, "OEM id : %s\n", buf);
503 snprintf(buf, 9, "%s", asus_info->oem_table_id);
504 len += sprintf(page + len, "OEM table id : %s\n", buf);
505 snprintf(buf, 16, "%x", asus_info->oem_revision);
506 len += sprintf(page + len, "OEM revision : 0x%s\n", buf);
507 snprintf(buf, 5, "%s", asus_info->asl_compiler_id);
508 len += sprintf(page + len, "ASL comp vendor id : %s\n", buf);
509 snprintf(buf, 16, "%x", asus_info->asl_compiler_revision);
510 len += sprintf(page + len, "ASL comp revision : 0x%s\n", buf);
511 }
512
513 return len;
514 }
515
516 /*
517 * /proc handlers
518 * We write our info in page, we begin at offset off and cannot write more
519 * than count bytes. We set eof to 1 if we handle those 2 values. We return the
520 * number of bytes written in page
521 */
522
523 /* Generic LED functions */
524 static int read_led(const char *ledname, int ledmask)
525 {
526 if (ledname) {
527 int led_status;
528
529 if (read_acpi_int(NULL, ledname, &led_status))
530 return led_status;
531 else
532 printk(KERN_WARNING "Asus ACPI: Error reading LED "
533 "status\n");
534 }
535 return (hotk->status & ledmask) ? 1 : 0;
536 }
537
538 static int parse_arg(const char __user * buf, unsigned long count, int *val)
539 {
540 char s[32];
541 if (!count)
542 return 0;
543 if (count > 31)
544 return -EINVAL;
545 if (copy_from_user(s, buf, count))
546 return -EFAULT;
547 s[count] = 0;
548 if (sscanf(s, "%i", val) != 1)
549 return -EINVAL;
550 return count;
551 }
552
553 /* FIXME: kill extraneous args so it can be called independently */
554 static int
555 write_led(const char __user * buffer, unsigned long count,
556 char *ledname, int ledmask, int invert)
557 {
558 int value;
559 int led_out = 0;
560
561 count = parse_arg(buffer, count, &value);
562 if (count > 0)
563 led_out = value ? 1 : 0;
564
565 hotk->status =
566 (led_out) ? (hotk->status | ledmask) : (hotk->status & ~ledmask);
567
568 if (invert) /* invert target value */
569 led_out = !led_out & 0x1;
570
571 if (!write_acpi_int(hotk->handle, ledname, led_out, NULL))
572 printk(KERN_WARNING "Asus ACPI: LED (%s) write failed\n",
573 ledname);
574
575 return count;
576 }
577
578 /*
579 * Proc handlers for MLED
580 */
581 static int
582 proc_read_mled(char *page, char **start, off_t off, int count, int *eof,
583 void *data)
584 {
585 return sprintf(page, "%d\n",
586 read_led(hotk->methods->mled_status, MLED_ON));
587 }
588
589 static int
590 proc_write_mled(struct file *file, const char __user * buffer,
591 unsigned long count, void *data)
592 {
593 return write_led(buffer, count, hotk->methods->mt_mled, MLED_ON, 1);
594 }
595
596 /*
597 * Proc handlers for LED display
598 */
599 static int
600 proc_read_ledd(char *page, char **start, off_t off, int count, int *eof,
601 void *data)
602 {
603 return sprintf(page, "0x%08x\n", hotk->ledd_status);
604 }
605
606 static int
607 proc_write_ledd(struct file *file, const char __user * buffer,
608 unsigned long count, void *data)
609 {
610 int value;
611
612 count = parse_arg(buffer, count, &value);
613 if (count > 0) {
614 if (!write_acpi_int
615 (hotk->handle, hotk->methods->mt_ledd, value, NULL))
616 printk(KERN_WARNING
617 "Asus ACPI: LED display write failed\n");
618 else
619 hotk->ledd_status = (u32) value;
620 } else if (count < 0)
621 printk(KERN_WARNING "Asus ACPI: Error reading user input\n");
622
623 return count;
624 }
625
626 /*
627 * Proc handlers for WLED
628 */
629 static int
630 proc_read_wled(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->wled_status, WLED_ON));
635 }
636
637 static int
638 proc_write_wled(struct file *file, const char __user * buffer,
639 unsigned long count, void *data)
640 {
641 return write_led(buffer, count, hotk->methods->mt_wled, WLED_ON, 0);
642 }
643
644 /*
645 * Proc handlers for Bluetooth
646 */
647 static int
648 proc_read_bluetooth(char *page, char **start, off_t off, int count, int *eof,
649 void *data)
650 {
651 return sprintf(page, "%d\n", read_led(hotk->methods->bt_status, BT_ON));
652 }
653
654 static int
655 proc_write_bluetooth(struct file *file, const char __user * buffer,
656 unsigned long count, void *data)
657 {
658 /* Note: mt_bt_switch controls both internal Bluetooth adapter's
659 presence and its LED */
660 return write_led(buffer, count, hotk->methods->mt_bt_switch, BT_ON, 0);
661 }
662
663 /*
664 * Proc handlers for TLED
665 */
666 static int
667 proc_read_tled(char *page, char **start, off_t off, int count, int *eof,
668 void *data)
669 {
670 return sprintf(page, "%d\n",
671 read_led(hotk->methods->tled_status, TLED_ON));
672 }
673
674 static int
675 proc_write_tled(struct file *file, const char __user * buffer,
676 unsigned long count, void *data)
677 {
678 return write_led(buffer, count, hotk->methods->mt_tled, TLED_ON, 0);
679 }
680
681 static int get_lcd_state(void)
682 {
683 int lcd = 0;
684
685 if (hotk->model != L3H) {
686 /* We don't have to check anything if we are here */
687 if (!read_acpi_int(NULL, hotk->methods->lcd_status, &lcd))
688 printk(KERN_WARNING
689 "Asus ACPI: Error reading LCD status\n");
690
691 if (hotk->model == L2D)
692 lcd = ~lcd;
693 } else { /* L3H and the like have to be handled differently */
694 acpi_status status = 0;
695 struct acpi_object_list input;
696 union acpi_object mt_params[2];
697 struct acpi_buffer output;
698 union acpi_object out_obj;
699
700 input.count = 2;
701 input.pointer = mt_params;
702 /* Note: the following values are partly guessed up, but
703 otherwise they seem to work */
704 mt_params[0].type = ACPI_TYPE_INTEGER;
705 mt_params[0].integer.value = 0x02;
706 mt_params[1].type = ACPI_TYPE_INTEGER;
707 mt_params[1].integer.value = 0x02;
708
709 output.length = sizeof(out_obj);
710 output.pointer = &out_obj;
711
712 status =
713 acpi_evaluate_object(NULL, hotk->methods->lcd_status,
714 &input, &output);
715 if (status != AE_OK)
716 return -1;
717 if (out_obj.type == ACPI_TYPE_INTEGER)
718 /* That's what the AML code does */
719 lcd = out_obj.integer.value >> 8;
720 }
721
722 return (lcd & 1);
723 }
724
725 static int set_lcd_state(int value)
726 {
727 int lcd = 0;
728 acpi_status status = 0;
729
730 lcd = value ? 1 : 0;
731 if (lcd != get_lcd_state()) {
732 /* switch */
733 if (hotk->model != L3H) {
734 status =
735 acpi_evaluate_object(NULL,
736 hotk->methods->mt_lcd_switch,
737 NULL, NULL);
738 } else { /* L3H and the like have to be handled differently */
739 if (!write_acpi_int
740 (hotk->handle, hotk->methods->mt_lcd_switch, 0x07,
741 NULL))
742 status = AE_ERROR;
743 /* L3H's AML executes EHK (0x07) upon Fn+F7 keypress,
744 the exact behaviour is simulated here */
745 }
746 if (ACPI_FAILURE(status))
747 printk(KERN_WARNING "Asus ACPI: Error switching LCD\n");
748 }
749 return 0;
750
751 }
752
753 static int
754 proc_read_lcd(char *page, char **start, off_t off, int count, int *eof,
755 void *data)
756 {
757 return sprintf(page, "%d\n", get_lcd_state());
758 }
759
760 static int
761 proc_write_lcd(struct file *file, const char __user * buffer,
762 unsigned long count, void *data)
763 {
764 int value;
765
766 count = parse_arg(buffer, count, &value);
767 if (count > 0)
768 set_lcd_state(value);
769 return count;
770 }
771
772 static int read_brightness(void)
773 {
774 int value;
775
776 if (hotk->methods->brightness_get) { /* SPLV/GPLV laptop */
777 if (!read_acpi_int(hotk->handle, hotk->methods->brightness_get,
778 &value))
779 printk(KERN_WARNING
780 "Asus ACPI: Error reading brightness\n");
781 } else if (hotk->methods->brightness_status) { /* For D1 for example */
782 if (!read_acpi_int(NULL, hotk->methods->brightness_status,
783 &value))
784 printk(KERN_WARNING
785 "Asus ACPI: Error reading brightness\n");
786 } else /* No GPLV method */
787 value = hotk->brightness;
788 return value;
789 }
790
791 /*
792 * Change the brightness level
793 */
794 static void set_brightness(int value)
795 {
796 acpi_status status = 0;
797
798 /* SPLV laptop */
799 if (hotk->methods->brightness_set) {
800 if (!write_acpi_int(hotk->handle, hotk->methods->brightness_set,
801 value, NULL))
802 printk(KERN_WARNING
803 "Asus ACPI: Error changing brightness\n");
804 return;
805 }
806
807 /* No SPLV method if we are here, act as appropriate */
808 value -= read_brightness();
809 while (value != 0) {
810 status = acpi_evaluate_object(NULL, (value > 0) ?
811 hotk->methods->brightness_up :
812 hotk->methods->brightness_down,
813 NULL, NULL);
814 (value > 0) ? value-- : value++;
815 if (ACPI_FAILURE(status))
816 printk(KERN_WARNING
817 "Asus ACPI: Error changing brightness\n");
818 }
819 return;
820 }
821
822 static int
823 proc_read_brn(char *page, char **start, off_t off, int count, int *eof,
824 void *data)
825 {
826 return sprintf(page, "%d\n", read_brightness());
827 }
828
829 static int
830 proc_write_brn(struct file *file, const char __user * buffer,
831 unsigned long count, void *data)
832 {
833 int value;
834
835 count = parse_arg(buffer, count, &value);
836 if (count > 0) {
837 value = (0 < value) ? ((15 < value) ? 15 : value) : 0;
838 /* 0 <= value <= 15 */
839 set_brightness(value);
840 } else if (count < 0) {
841 printk(KERN_WARNING "Asus ACPI: Error reading user input\n");
842 }
843
844 return count;
845 }
846
847 static void set_display(int value)
848 {
849 /* no sanity check needed for now */
850 if (!write_acpi_int(hotk->handle, hotk->methods->display_set,
851 value, NULL))
852 printk(KERN_WARNING "Asus ACPI: Error setting display\n");
853 return;
854 }
855
856 /*
857 * Now, *this* one could be more user-friendly, but so far, no-one has
858 * complained. The significance of bits is the same as in proc_write_disp()
859 */
860 static int
861 proc_read_disp(char *page, char **start, off_t off, int count, int *eof,
862 void *data)
863 {
864 int value = 0;
865
866 if (!read_acpi_int(hotk->handle, hotk->methods->display_get, &value))
867 printk(KERN_WARNING
868 "Asus ACPI: Error reading display status\n");
869 value &= 0x07; /* needed for some models, shouldn't hurt others */
870 return sprintf(page, "%d\n", value);
871 }
872
873 /*
874 * Experimental support for display switching. As of now: 1 should activate
875 * the LCD output, 2 should do for CRT, and 4 for TV-Out. Any combination
876 * (bitwise) of these will suffice. I never actually tested 3 displays hooked up
877 * simultaneously, so be warned. See the acpi4asus README for more info.
878 */
879 static int
880 proc_write_disp(struct file *file, const char __user * buffer,
881 unsigned long count, void *data)
882 {
883 int value;
884
885 count = parse_arg(buffer, count, &value);
886 if (count > 0)
887 set_display(value);
888 else if (count < 0)
889 printk(KERN_WARNING "Asus ACPI: Error reading user input\n");
890
891 return count;
892 }
893
894 typedef int (proc_readfunc) (char *page, char **start, off_t off, int count,
895 int *eof, void *data);
896 typedef int (proc_writefunc) (struct file * file, const char __user * buffer,
897 unsigned long count, void *data);
898
899 static int
900 asus_proc_add(char *name, proc_writefunc * writefunc,
901 proc_readfunc * readfunc, mode_t mode,
902 struct acpi_device *device)
903 {
904 struct proc_dir_entry *proc =
905 create_proc_entry(name, mode, acpi_device_dir(device));
906 if (!proc) {
907 printk(KERN_WARNING " Unable to create %s fs entry\n", name);
908 return -1;
909 }
910 proc->write_proc = writefunc;
911 proc->read_proc = readfunc;
912 proc->data = acpi_driver_data(device);
913 proc->owner = THIS_MODULE;
914 proc->uid = asus_uid;
915 proc->gid = asus_gid;
916 return 0;
917 }
918
919 static int asus_hotk_add_fs(struct acpi_device *device)
920 {
921 struct proc_dir_entry *proc;
922 mode_t mode;
923
924 /*
925 * If parameter uid or gid is not changed, keep the default setting for
926 * our proc entries (-rw-rw-rw-) else, it means we care about security,
927 * and then set to -rw-rw----
928 */
929
930 if ((asus_uid == 0) && (asus_gid == 0)) {
931 mode = S_IFREG | S_IRUGO | S_IWUGO;
932 } else {
933 mode = S_IFREG | S_IRUSR | S_IRGRP | S_IWUSR | S_IWGRP;
934 printk(KERN_WARNING " asus_uid and asus_gid parameters are "
935 "deprecated, use chown and chmod instead!\n");
936 }
937
938 acpi_device_dir(device) = asus_proc_dir;
939 if (!acpi_device_dir(device))
940 return -ENODEV;
941
942 proc = create_proc_entry(PROC_INFO, mode, acpi_device_dir(device));
943 if (proc) {
944 proc->read_proc = proc_read_info;
945 proc->data = acpi_driver_data(device);
946 proc->owner = THIS_MODULE;
947 proc->uid = asus_uid;
948 proc->gid = asus_gid;
949 } else {
950 printk(KERN_WARNING " Unable to create " PROC_INFO
951 " fs entry\n");
952 }
953
954 if (hotk->methods->mt_wled) {
955 asus_proc_add(PROC_WLED, &proc_write_wled, &proc_read_wled,
956 mode, device);
957 }
958
959 if (hotk->methods->mt_ledd) {
960 asus_proc_add(PROC_LEDD, &proc_write_ledd, &proc_read_ledd,
961 mode, device);
962 }
963
964 if (hotk->methods->mt_mled) {
965 asus_proc_add(PROC_MLED, &proc_write_mled, &proc_read_mled,
966 mode, device);
967 }
968
969 if (hotk->methods->mt_tled) {
970 asus_proc_add(PROC_TLED, &proc_write_tled, &proc_read_tled,
971 mode, device);
972 }
973
974 if (hotk->methods->mt_bt_switch) {
975 asus_proc_add(PROC_BT, &proc_write_bluetooth,
976 &proc_read_bluetooth, mode, device);
977 }
978
979 /*
980 * We need both read node and write method as LCD switch is also accessible
981 * from keyboard
982 */
983 if (hotk->methods->mt_lcd_switch && hotk->methods->lcd_status) {
984 asus_proc_add(PROC_LCD, &proc_write_lcd, &proc_read_lcd, mode,
985 device);
986 }
987
988 if ((hotk->methods->brightness_up && hotk->methods->brightness_down) ||
989 (hotk->methods->brightness_get && hotk->methods->brightness_set)) {
990 asus_proc_add(PROC_BRN, &proc_write_brn, &proc_read_brn, mode,
991 device);
992 }
993
994 if (hotk->methods->display_set) {
995 asus_proc_add(PROC_DISP, &proc_write_disp, &proc_read_disp,
996 mode, device);
997 }
998
999 return 0;
1000 }
1001
1002 static int asus_hotk_remove_fs(struct acpi_device *device)
1003 {
1004 if (acpi_device_dir(device)) {
1005 remove_proc_entry(PROC_INFO, acpi_device_dir(device));
1006 if (hotk->methods->mt_wled)
1007 remove_proc_entry(PROC_WLED, acpi_device_dir(device));
1008 if (hotk->methods->mt_mled)
1009 remove_proc_entry(PROC_MLED, acpi_device_dir(device));
1010 if (hotk->methods->mt_tled)
1011 remove_proc_entry(PROC_TLED, acpi_device_dir(device));
1012 if (hotk->methods->mt_ledd)
1013 remove_proc_entry(PROC_LEDD, acpi_device_dir(device));
1014 if (hotk->methods->mt_bt_switch)
1015 remove_proc_entry(PROC_BT, acpi_device_dir(device));
1016 if (hotk->methods->mt_lcd_switch && hotk->methods->lcd_status)
1017 remove_proc_entry(PROC_LCD, acpi_device_dir(device));
1018 if ((hotk->methods->brightness_up
1019 && hotk->methods->brightness_down)
1020 || (hotk->methods->brightness_get
1021 && hotk->methods->brightness_set))
1022 remove_proc_entry(PROC_BRN, acpi_device_dir(device));
1023 if (hotk->methods->display_set)
1024 remove_proc_entry(PROC_DISP, acpi_device_dir(device));
1025 }
1026 return 0;
1027 }
1028
1029 static void asus_hotk_notify(acpi_handle handle, u32 event, void *data)
1030 {
1031 /* TODO Find a better way to handle events count. */
1032 if (!hotk)
1033 return;
1034
1035 if ((event & ~((u32) BR_UP)) < 16) {
1036 hotk->brightness = (event & ~((u32) BR_UP));
1037 } else if ((event & ~((u32) BR_DOWN)) < 16) {
1038 hotk->brightness = (event & ~((u32) BR_DOWN));
1039 }
1040
1041 acpi_bus_generate_event(hotk->device, event,
1042 hotk->event_count[event % 128]++);
1043
1044 return;
1045 }
1046
1047 /*
1048 * Match the model string to the list of supported models. Return END_MODEL if
1049 * no match or model is NULL.
1050 */
1051 static int asus_model_match(char *model)
1052 {
1053 if (model == NULL)
1054 return END_MODEL;
1055
1056 if (strncmp(model, "L3D", 3) == 0)
1057 return L3D;
1058 else if (strncmp(model, "L2E", 3) == 0 ||
1059 strncmp(model, "L3H", 3) == 0 || strncmp(model, "L5D", 3) == 0)
1060 return L3H;
1061 else if (strncmp(model, "L3", 2) == 0 || strncmp(model, "L2B", 3) == 0)
1062 return L3C;
1063 else if (strncmp(model, "L8L", 3) == 0)
1064 return L8L;
1065 else if (strncmp(model, "L4R", 3) == 0)
1066 return L4R;
1067 else if (strncmp(model, "M6N", 3) == 0 || strncmp(model, "W3N", 3) == 0)
1068 return M6N;
1069 else if (strncmp(model, "M6R", 3) == 0 || strncmp(model, "A3G", 3) == 0)
1070 return M6R;
1071 else if (strncmp(model, "M2N", 3) == 0 ||
1072 strncmp(model, "M3N", 3) == 0 ||
1073 strncmp(model, "M5N", 3) == 0 ||
1074 strncmp(model, "M6N", 3) == 0 ||
1075 strncmp(model, "S1N", 3) == 0 ||
1076 strncmp(model, "S5N", 3) == 0 || strncmp(model, "W1N", 3) == 0)
1077 return xxN;
1078 else if (strncmp(model, "M1", 2) == 0)
1079 return M1A;
1080 else if (strncmp(model, "M2", 2) == 0 || strncmp(model, "L4E", 3) == 0)
1081 return M2E;
1082 else if (strncmp(model, "L2", 2) == 0)
1083 return L2D;
1084 else if (strncmp(model, "L8", 2) == 0)
1085 return S1x;
1086 else if (strncmp(model, "D1", 2) == 0)
1087 return D1x;
1088 else if (strncmp(model, "A1", 2) == 0)
1089 return A1x;
1090 else if (strncmp(model, "A2", 2) == 0)
1091 return A2x;
1092 else if (strncmp(model, "J1", 2) == 0)
1093 return S2x;
1094 else if (strncmp(model, "L5", 2) == 0)
1095 return L5x;
1096 else if (strncmp(model, "A4G", 3) == 0)
1097 return A4G;
1098 else if (strncmp(model, "W1N", 3) == 0)
1099 return W1N;
1100 else if (strncmp(model, "W5A", 3) == 0)
1101 return W5A;
1102 else
1103 return END_MODEL;
1104 }
1105
1106 /*
1107 * This function is used to initialize the hotk with right values. In this
1108 * method, we can make all the detection we want, and modify the hotk struct
1109 */
1110 static int asus_hotk_get_info(void)
1111 {
1112 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
1113 struct acpi_buffer dsdt = { ACPI_ALLOCATE_BUFFER, NULL };
1114 union acpi_object *model = NULL;
1115 int bsts_result;
1116 char *string = NULL;
1117 acpi_status status;
1118
1119 /*
1120 * Get DSDT headers early enough to allow for differentiating between
1121 * models, but late enough to allow acpi_bus_register_driver() to fail
1122 * before doing anything ACPI-specific. Should we encounter a machine,
1123 * which needs special handling (i.e. its hotkey device has a different
1124 * HID), this bit will be moved. A global variable asus_info contains
1125 * the DSDT header.
1126 */
1127 status = acpi_get_table(ACPI_TABLE_ID_DSDT, 1, &dsdt);
1128 if (ACPI_FAILURE(status))
1129 printk(KERN_WARNING " Couldn't get the DSDT table header\n");
1130 else
1131 asus_info = (struct acpi_table_header *)dsdt.pointer;
1132
1133 /* We have to write 0 on init this far for all ASUS models */
1134 if (!write_acpi_int(hotk->handle, "INIT", 0, &buffer)) {
1135 printk(KERN_ERR " Hotkey initialization failed\n");
1136 return -ENODEV;
1137 }
1138
1139 /* This needs to be called for some laptops to init properly */
1140 if (!read_acpi_int(hotk->handle, "BSTS", &bsts_result))
1141 printk(KERN_WARNING " Error calling BSTS\n");
1142 else if (bsts_result)
1143 printk(KERN_NOTICE " BSTS called, 0x%02x returned\n",
1144 bsts_result);
1145
1146 /*
1147 * Try to match the object returned by INIT to the specific model.
1148 * Handle every possible object (or the lack of thereof) the DSDT
1149 * writers might throw at us. When in trouble, we pass NULL to
1150 * asus_model_match() and try something completely different.
1151 */
1152 if (buffer.pointer) {
1153 model = (union acpi_object *)buffer.pointer;
1154 switch (model->type) {
1155 case ACPI_TYPE_STRING:
1156 string = model->string.pointer;
1157 break;
1158 case ACPI_TYPE_BUFFER:
1159 string = model->buffer.pointer;
1160 break;
1161 default:
1162 kfree(model);
1163 break;
1164 }
1165 }
1166 hotk->model = asus_model_match(string);
1167 if (hotk->model == END_MODEL) { /* match failed */
1168 if (asus_info &&
1169 strncmp(asus_info->oem_table_id, "ODEM", 4) == 0) {
1170 hotk->model = P30;
1171 printk(KERN_NOTICE
1172 " Samsung P30 detected, supported\n");
1173 } else {
1174 hotk->model = M2E;
1175 printk(KERN_NOTICE " unsupported model %s, trying "
1176 "default values\n", string);
1177 printk(KERN_NOTICE
1178 " send /proc/acpi/dsdt to the developers\n");
1179 }
1180 hotk->methods = &model_conf[hotk->model];
1181 return AE_OK;
1182 }
1183 hotk->methods = &model_conf[hotk->model];
1184 printk(KERN_NOTICE " %s model detected, supported\n", string);
1185
1186 /* Sort of per-model blacklist */
1187 if (strncmp(string, "L2B", 3) == 0)
1188 hotk->methods->lcd_status = NULL;
1189 /* L2B is similar enough to L3C to use its settings, with this only
1190 exception */
1191 else if (strncmp(string, "A3G", 3) == 0)
1192 hotk->methods->lcd_status = "\\BLFG";
1193 /* A3G is like M6R */
1194 else if (strncmp(string, "S5N", 3) == 0 ||
1195 strncmp(string, "M5N", 3) == 0 ||
1196 strncmp(string, "W3N", 3) == 0)
1197 hotk->methods->mt_mled = NULL;
1198 /* S5N, M5N and W3N have no MLED */
1199 else if (strncmp(string, "L5D", 3) == 0)
1200 hotk->methods->mt_wled = NULL;
1201 /* L5D's WLED is not controlled by ACPI */
1202 else if (strncmp(string, "M2N", 3) == 0 ||
1203 strncmp(string, "S1N", 3) == 0)
1204 hotk->methods->mt_wled = "WLED";
1205 /* M2N and S1N have a usable WLED */
1206 else if (asus_info) {
1207 if (strncmp(asus_info->oem_table_id, "L1", 2) == 0)
1208 hotk->methods->mled_status = NULL;
1209 /* S1300A reports L84F, but L1400B too, account for that */
1210 }
1211
1212 kfree(model);
1213
1214 return AE_OK;
1215 }
1216
1217 static int asus_hotk_check(void)
1218 {
1219 int result = 0;
1220
1221 result = acpi_bus_get_status(hotk->device);
1222 if (result)
1223 return result;
1224
1225 if (hotk->device->status.present) {
1226 result = asus_hotk_get_info();
1227 } else {
1228 printk(KERN_ERR " Hotkey device not present, aborting\n");
1229 return -EINVAL;
1230 }
1231
1232 return result;
1233 }
1234
1235 static int asus_hotk_found;
1236
1237 static int asus_hotk_add(struct acpi_device *device)
1238 {
1239 acpi_status status = AE_OK;
1240 int result;
1241
1242 if (!device)
1243 return -EINVAL;
1244
1245 printk(KERN_NOTICE "Asus Laptop ACPI Extras version %s\n",
1246 ASUS_ACPI_VERSION);
1247
1248 hotk =
1249 (struct asus_hotk *)kmalloc(sizeof(struct asus_hotk), GFP_KERNEL);
1250 if (!hotk)
1251 return -ENOMEM;
1252 memset(hotk, 0, sizeof(struct asus_hotk));
1253
1254 hotk->handle = device->handle;
1255 strcpy(acpi_device_name(device), ACPI_HOTK_DEVICE_NAME);
1256 strcpy(acpi_device_class(device), ACPI_HOTK_CLASS);
1257 acpi_driver_data(device) = hotk;
1258 hotk->device = device;
1259
1260 result = asus_hotk_check();
1261 if (result)
1262 goto end;
1263
1264 result = asus_hotk_add_fs(device);
1265 if (result)
1266 goto end;
1267
1268 /*
1269 * We install the handler, it will receive the hotk in parameter, so, we
1270 * could add other data to the hotk struct
1271 */
1272 status = acpi_install_notify_handler(hotk->handle, ACPI_SYSTEM_NOTIFY,
1273 asus_hotk_notify, hotk);
1274 if (ACPI_FAILURE(status))
1275 printk(KERN_ERR " Error installing notify handler\n");
1276
1277 /* For laptops without GPLV: init the hotk->brightness value */
1278 if ((!hotk->methods->brightness_get)
1279 && (!hotk->methods->brightness_status)
1280 && (hotk->methods->brightness_up && hotk->methods->brightness_down)) {
1281 status =
1282 acpi_evaluate_object(NULL, hotk->methods->brightness_down,
1283 NULL, NULL);
1284 if (ACPI_FAILURE(status))
1285 printk(KERN_WARNING " Error changing brightness\n");
1286 else {
1287 status =
1288 acpi_evaluate_object(NULL,
1289 hotk->methods->brightness_up,
1290 NULL, NULL);
1291 if (ACPI_FAILURE(status))
1292 printk(KERN_WARNING " Strange, error changing"
1293 " brightness\n");
1294 }
1295 }
1296
1297 asus_hotk_found = 1;
1298
1299 /* LED display is off by default */
1300 hotk->ledd_status = 0xFFF;
1301
1302 end:
1303 if (result) {
1304 kfree(hotk);
1305 }
1306
1307 return result;
1308 }
1309
1310 static int asus_hotk_remove(struct acpi_device *device, int type)
1311 {
1312 acpi_status status = 0;
1313
1314 if (!device || !acpi_driver_data(device))
1315 return -EINVAL;
1316
1317 status = acpi_remove_notify_handler(hotk->handle, ACPI_SYSTEM_NOTIFY,
1318 asus_hotk_notify);
1319 if (ACPI_FAILURE(status))
1320 printk(KERN_ERR "Asus ACPI: Error removing notify handler\n");
1321
1322 asus_hotk_remove_fs(device);
1323
1324 kfree(hotk);
1325
1326 return 0;
1327 }
1328
1329 static int __init asus_acpi_init(void)
1330 {
1331 int result;
1332
1333 if (acpi_disabled)
1334 return -ENODEV;
1335
1336 if (!acpi_specific_hotkey_enabled) {
1337 printk(KERN_ERR "Using generic hotkey driver\n");
1338 return -ENODEV;
1339 }
1340 asus_proc_dir = proc_mkdir(PROC_ASUS, acpi_root_dir);
1341 if (!asus_proc_dir) {
1342 printk(KERN_ERR "Asus ACPI: Unable to create /proc entry\n");
1343 return -ENODEV;
1344 }
1345 asus_proc_dir->owner = THIS_MODULE;
1346
1347 result = acpi_bus_register_driver(&asus_hotk_driver);
1348 if (result < 0) {
1349 remove_proc_entry(PROC_ASUS, acpi_root_dir);
1350 return result;
1351 }
1352
1353 /*
1354 * This is a bit of a kludge. We only want this module loaded
1355 * for ASUS systems, but there's currently no way to probe the
1356 * ACPI namespace for ASUS HIDs. So we just return failure if
1357 * we didn't find one, which will cause the module to be
1358 * unloaded.
1359 */
1360 if (!asus_hotk_found) {
1361 acpi_bus_unregister_driver(&asus_hotk_driver);
1362 remove_proc_entry(PROC_ASUS, acpi_root_dir);
1363 return result;
1364 }
1365
1366 return 0;
1367 }
1368
1369 static void __exit asus_acpi_exit(void)
1370 {
1371 acpi_bus_unregister_driver(&asus_hotk_driver);
1372 remove_proc_entry(PROC_ASUS, acpi_root_dir);
1373
1374 kfree(asus_info);
1375
1376 return;
1377 }
1378
1379 module_init(asus_acpi_init);
1380 module_exit(asus_acpi_exit);
linux v2.6.22.y-op