ACPI: asus_acpi: support A4G
[linux-2.6.git] / drivers / acpi / asus_acpi.c
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  *  √Čric 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_LEDD       "ledd"
49 #define PROC_INFO       "info"
50 #define PROC_LCD        "lcd"
51 #define PROC_BRN        "brn"
52 #define PROC_DISP       "disp"
53
54 #define ACPI_HOTK_NAME          "Asus Laptop ACPI Extras Driver"
55 #define ACPI_HOTK_CLASS         "hotkey"
56 #define ACPI_HOTK_DEVICE_NAME   "Hotkey"
57 #define ACPI_HOTK_HID           "ATK0100"
58
59 /*
60  * Some events we use, same for all Asus
61  */
62 #define BR_UP       0x10
63 #define BR_DOWN     0x20
64
65 /*
66  * Flags for hotk status
67  */
68 #define MLED_ON     0x01        //is MLED ON ?
69 #define WLED_ON     0x02
70 #define TLED_ON     0x04
71
72 MODULE_AUTHOR("Julien Lerouge, Karol Kozimor");
73 MODULE_DESCRIPTION(ACPI_HOTK_NAME);
74 MODULE_LICENSE("GPL");
75
76 static uid_t asus_uid;
77 static gid_t asus_gid;
78 module_param(asus_uid, uint, 0);
79 MODULE_PARM_DESC(asus_uid, "UID for entries in /proc/acpi/asus.\n");
80 module_param(asus_gid, uint, 0);
81 MODULE_PARM_DESC(asus_gid, "GID for entries in /proc/acpi/asus.\n");
82
83 /* For each model, all features implemented, 
84  * those marked with R are relative to HOTK, A for absolute */
85 struct model_data {
86         char *name;             //name of the laptop________________A
87         char *mt_mled;          //method to handle mled_____________R
88         char *mled_status;      //node to handle mled reading_______A
89         char *mt_wled;          //method to handle wled_____________R
90         char *wled_status;      //node to handle wled reading_______A
91         char *mt_tled;          //method to handle tled_____________R
92         char *tled_status;      //node to handle tled reading_______A
93         char *mt_ledd;          //method to handle LED display______R
94         char *mt_lcd_switch;    //method to turn LCD ON/OFF_________A
95         char *lcd_status;       //node to read LCD panel state______A
96         char *brightness_up;    //method to set brightness up_______A
97         char *brightness_down;  //guess what ?______________________A
98         char *brightness_set;   //method to set absolute brightness_R
99         char *brightness_get;   //method to get absolute brightness_R
100         char *brightness_status;        //node to get brightness____________A
101         char *display_set;      //method to set video output________R
102         char *display_get;      //method to get video output________R
103 };
104
105 /*
106  * This is the main structure, we can use it to store anything interesting
107  * about the hotk device
108  */
109 struct asus_hotk {
110         struct acpi_device *device;     //the device we are in
111         acpi_handle handle;     //the handle of the hotk device
112         char status;            //status of the hotk, for LEDs, ...
113         u32 ledd_status;        //status of the LED display
114         struct model_data *methods;     //methods available on the laptop
115         u8 brightness;          //brightness level
116         enum {
117                 A1x = 0,        //A1340D, A1300F
118                 A2x,            //A2500H
119                 A4G,            //A4700G
120                 D1x,            //D1
121                 L2D,            //L2000D
122                 L3C,            //L3800C
123                 L3D,            //L3400D
124                 L3H,            //L3H, but also L2000E
125                 L4R,            //L4500R
126                 L5x,            //L5800C 
127                 L8L,            //L8400L
128                 M1A,            //M1300A
129                 M2E,            //M2400E, L4400L
130                 M6N,            //M6800N, W3400N
131                 M6R,            //M6700R, A3000G
132                 P30,            //Samsung P30
133                 S1x,            //S1300A, but also L1400B and M2400A (L84F)
134                 S2x,            //S200 (J1 reported), Victor MP-XP7210
135                 W1N,            //W1000N
136                 xxN,            //M2400N, M3700N, M5200N, M6800N, S1300N, S5200N
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          * TODO I have seen a SWBX and AIBX method on some models, like L1400B,
155          * it seems to be a kind of switch, but what for ?
156          */
157
158         {
159          .name = "A1x",
160          .mt_mled = "MLED",
161          .mled_status = "\\MAIL",
162          .mt_lcd_switch = A1x_PREFIX "_Q10",
163          .lcd_status = "\\BKLI",
164          .brightness_up = A1x_PREFIX "_Q0E",
165          .brightness_down = A1x_PREFIX "_Q0F"},
166
167         {
168          .name = "A2x",
169          .mt_mled = "MLED",
170          .mt_wled = "WLED",
171          .wled_status = "\\SG66",
172          .mt_lcd_switch = "\\Q10",
173          .lcd_status = "\\BAOF",
174          .brightness_set = "SPLV",
175          .brightness_get = "GPLV",
176          .display_set = "SDSP",
177          .display_get = "\\INFB"},
178
179         {
180          .name = "A4G",
181          .mt_mled = "MLED",
182 /* WLED present, but not controlled by ACPI */
183          .mt_lcd_switch = xxN_PREFIX "_Q10",
184          .brightness_set = "SPLV",
185          .brightness_get = "GPLV",
186          .display_set = "SDSP",
187          .display_get = "\\ADVG"},
188
189         {
190          .name = "D1x",
191          .mt_mled = "MLED",
192          .mt_lcd_switch = "\\Q0D",
193          .lcd_status = "\\GP11",
194          .brightness_up = "\\Q0C",
195          .brightness_down = "\\Q0B",
196          .brightness_status = "\\BLVL",
197          .display_set = "SDSP",
198          .display_get = "\\INFB"},
199
200         {
201          .name = "L2D",
202          .mt_mled = "MLED",
203          .mled_status = "\\SGP6",
204          .mt_wled = "WLED",
205          .wled_status = "\\RCP3",
206          .mt_lcd_switch = "\\Q10",
207          .lcd_status = "\\SGP0",
208          .brightness_up = "\\Q0E",
209          .brightness_down = "\\Q0F",
210          .display_set = "SDSP",
211          .display_get = "\\INFB"},
212
213         {
214          .name = "L3C",
215          .mt_mled = "MLED",
216          .mt_wled = "WLED",
217          .mt_lcd_switch = L3C_PREFIX "_Q10",
218          .lcd_status = "\\GL32",
219          .brightness_set = "SPLV",
220          .brightness_get = "GPLV",
221          .display_set = "SDSP",
222          .display_get = "\\_SB.PCI0.PCI1.VGAC.NMAP"},
223
224         {
225          .name = "L3D",
226          .mt_mled = "MLED",
227          .mled_status = "\\MALD",
228          .mt_wled = "WLED",
229          .mt_lcd_switch = "\\Q10",
230          .lcd_status = "\\BKLG",
231          .brightness_set = "SPLV",
232          .brightness_get = "GPLV",
233          .display_set = "SDSP",
234          .display_get = "\\INFB"},
235
236         {
237          .name = "L3H",
238          .mt_mled = "MLED",
239          .mt_wled = "WLED",
240          .mt_lcd_switch = "EHK",
241          .lcd_status = "\\_SB.PCI0.PM.PBC",
242          .brightness_set = "SPLV",
243          .brightness_get = "GPLV",
244          .display_set = "SDSP",
245          .display_get = "\\INFB"},
246
247         {
248          .name = "L4R",
249          .mt_mled = "MLED",
250          .mt_wled = "WLED",
251          .wled_status = "\\_SB.PCI0.SBRG.SG13",
252          .mt_lcd_switch = xxN_PREFIX "_Q10",
253          .lcd_status = "\\_SB.PCI0.SBSM.SEO4",
254          .brightness_set = "SPLV",
255          .brightness_get = "GPLV",
256          .display_set = "SDSP",
257          .display_get = "\\_SB.PCI0.P0P1.VGA.GETD"},
258
259         {
260          .name = "L5x",
261          .mt_mled = "MLED",
262 /* WLED present, but not controlled by ACPI */
263          .mt_tled = "TLED",
264          .mt_lcd_switch = "\\Q0D",
265          .lcd_status = "\\BAOF",
266          .brightness_set = "SPLV",
267          .brightness_get = "GPLV",
268          .display_set = "SDSP",
269          .display_get = "\\INFB"},
270
271         {
272          .name = "L8L"
273 /* No features, but at least support the hotkeys */
274          },
275
276         {
277          .name = "M1A",
278          .mt_mled = "MLED",
279          .mt_lcd_switch = M1A_PREFIX "Q10",
280          .lcd_status = "\\PNOF",
281          .brightness_up = M1A_PREFIX "Q0E",
282          .brightness_down = M1A_PREFIX "Q0F",
283          .brightness_status = "\\BRIT",
284          .display_set = "SDSP",
285          .display_get = "\\INFB"},
286
287         {
288          .name = "M2E",
289          .mt_mled = "MLED",
290          .mt_wled = "WLED",
291          .mt_lcd_switch = "\\Q10",
292          .lcd_status = "\\GP06",
293          .brightness_set = "SPLV",
294          .brightness_get = "GPLV",
295          .display_set = "SDSP",
296          .display_get = "\\INFB"},
297
298         {
299          .name = "M6N",
300          .mt_mled = "MLED",
301          .mt_wled = "WLED",
302          .wled_status = "\\_SB.PCI0.SBRG.SG13",
303          .mt_lcd_switch = xxN_PREFIX "_Q10",
304          .lcd_status = "\\_SB.BKLT",
305          .brightness_set = "SPLV",
306          .brightness_get = "GPLV",
307          .display_set = "SDSP",
308          .display_get = "\\_SB.PCI0.P0P1.VGA.GETD"},
309         {
310          .name = "M6R",
311          .mt_mled = "MLED",
312          .mt_wled = "WLED",
313          .mt_lcd_switch = xxN_PREFIX "_Q10",
314          .lcd_status = "\\_SB.PCI0.SBSM.SEO4",
315          .brightness_set = "SPLV",
316          .brightness_get = "GPLV",
317          .display_set = "SDSP",
318          .display_get = "\\SSTE"},
319
320         {
321          .name = "P30",
322          .mt_wled = "WLED",
323          .mt_lcd_switch = P30_PREFIX "_Q0E",
324          .lcd_status = "\\BKLT",
325          .brightness_up = P30_PREFIX "_Q68",
326          .brightness_down = P30_PREFIX "_Q69",
327          .brightness_get = "GPLV",
328          .display_set = "SDSP",
329          .display_get = "\\DNXT"},
330
331         {
332          .name = "S1x",
333          .mt_mled = "MLED",
334          .mled_status = "\\EMLE",
335          .mt_wled = "WLED",
336          .mt_lcd_switch = S1x_PREFIX "Q10",
337          .lcd_status = "\\PNOF",
338          .brightness_set = "SPLV",
339          .brightness_get = "GPLV"},
340
341         {
342          .name = "S2x",
343          .mt_mled = "MLED",
344          .mled_status = "\\MAIL",
345          .mt_lcd_switch = S2x_PREFIX "_Q10",
346          .lcd_status = "\\BKLI",
347          .brightness_up = S2x_PREFIX "_Q0B",
348          .brightness_down = S2x_PREFIX "_Q0A"},
349
350         {
351          .name = "W1N",
352          .mt_mled = "MLED",
353          .mt_wled = "WLED",
354          .mt_ledd = "SLCM",
355          .mt_lcd_switch = xxN_PREFIX "_Q10",
356          .lcd_status = "\\BKLT",
357          .brightness_set = "SPLV",
358          .brightness_get = "GPLV",
359          .display_set = "SDSP",
360          .display_get = "\\ADVG"},
361
362         {
363          .name = "xxN",
364          .mt_mled = "MLED",
365 /* WLED present, but not controlled by ACPI */
366          .mt_lcd_switch = xxN_PREFIX "_Q10",
367          .lcd_status = "\\BKLT",
368          .brightness_set = "SPLV",
369          .brightness_get = "GPLV",
370          .display_set = "SDSP",
371          .display_get = "\\ADVG"}
372 };
373
374 /* procdir we use */
375 static struct proc_dir_entry *asus_proc_dir;
376
377 /*
378  * This header is made available to allow proper configuration given model,
379  * revision number , ... this info cannot go in struct asus_hotk because it is
380  * available before the hotk
381  */
382 static struct acpi_table_header *asus_info;
383
384 /* The actual device the driver binds to */
385 static struct asus_hotk *hotk;
386
387 /*
388  * The hotkey driver declaration
389  */
390 static int asus_hotk_add(struct acpi_device *device);
391 static int asus_hotk_remove(struct acpi_device *device, int type);
392 static struct acpi_driver asus_hotk_driver = {
393         .name = ACPI_HOTK_NAME,
394         .class = ACPI_HOTK_CLASS,
395         .ids = ACPI_HOTK_HID,
396         .ops = {
397                 .add = asus_hotk_add,
398                 .remove = asus_hotk_remove,
399                 },
400 };
401
402 /* 
403  * This function evaluates an ACPI method, given an int as parameter, the
404  * method is searched within the scope of the handle, can be NULL. The output
405  * of the method is written is output, which can also be NULL
406  *
407  * returns 1 if write is successful, 0 else. 
408  */
409 static int write_acpi_int(acpi_handle handle, const char *method, int val,
410                           struct acpi_buffer *output)
411 {
412         struct acpi_object_list params; //list of input parameters (an int here)
413         union acpi_object in_obj;       //the only param we use
414         acpi_status status;
415
416         params.count = 1;
417         params.pointer = &in_obj;
418         in_obj.type = ACPI_TYPE_INTEGER;
419         in_obj.integer.value = val;
420
421         status = acpi_evaluate_object(handle, (char *)method, &params, output);
422         return (status == AE_OK);
423 }
424
425 static int read_acpi_int(acpi_handle handle, const char *method, int *val)
426 {
427         struct acpi_buffer output;
428         union acpi_object out_obj;
429         acpi_status status;
430
431         output.length = sizeof(out_obj);
432         output.pointer = &out_obj;
433
434         status = acpi_evaluate_object(handle, (char *)method, NULL, &output);
435         *val = out_obj.integer.value;
436         return (status == AE_OK) && (out_obj.type == ACPI_TYPE_INTEGER);
437 }
438
439 /*
440  * We write our info in page, we begin at offset off and cannot write more
441  * than count bytes. We set eof to 1 if we handle those 2 values. We return the
442  * number of bytes written in page
443  */
444 static int
445 proc_read_info(char *page, char **start, off_t off, int count, int *eof,
446                void *data)
447 {
448         int len = 0;
449         int temp;
450         char buf[16];           //enough for all info
451         /*
452          * We use the easy way, we don't care of off and count, so we don't set eof
453          * to 1
454          */
455
456         len += sprintf(page, ACPI_HOTK_NAME " " ASUS_ACPI_VERSION "\n");
457         len += sprintf(page + len, "Model reference    : %s\n",
458                        hotk->methods->name);
459         /* 
460          * The SFUN method probably allows the original driver to get the list 
461          * of features supported by a given model. For now, 0x0100 or 0x0800 
462          * bit signifies that the laptop is equipped with a Wi-Fi MiniPCI card.
463          * The significance of others is yet to be found.
464          */
465         if (read_acpi_int(hotk->handle, "SFUN", &temp))
466                 len +=
467                     sprintf(page + len, "SFUN value         : 0x%04x\n", temp);
468         /*
469          * Another value for userspace: the ASYM method returns 0x02 for
470          * battery low and 0x04 for battery critical, its readings tend to be
471          * more accurate than those provided by _BST. 
472          * Note: since not all the laptops provide this method, errors are
473          * silently ignored.
474          */
475         if (read_acpi_int(hotk->handle, "ASYM", &temp))
476                 len +=
477                     sprintf(page + len, "ASYM value         : 0x%04x\n", temp);
478         if (asus_info) {
479                 snprintf(buf, 16, "%d", asus_info->length);
480                 len += sprintf(page + len, "DSDT length        : %s\n", buf);
481                 snprintf(buf, 16, "%d", asus_info->checksum);
482                 len += sprintf(page + len, "DSDT checksum      : %s\n", buf);
483                 snprintf(buf, 16, "%d", asus_info->revision);
484                 len += sprintf(page + len, "DSDT revision      : %s\n", buf);
485                 snprintf(buf, 7, "%s", asus_info->oem_id);
486                 len += sprintf(page + len, "OEM id             : %s\n", buf);
487                 snprintf(buf, 9, "%s", asus_info->oem_table_id);
488                 len += sprintf(page + len, "OEM table id       : %s\n", buf);
489                 snprintf(buf, 16, "%x", asus_info->oem_revision);
490                 len += sprintf(page + len, "OEM revision       : 0x%s\n", buf);
491                 snprintf(buf, 5, "%s", asus_info->asl_compiler_id);
492                 len += sprintf(page + len, "ASL comp vendor id : %s\n", buf);
493                 snprintf(buf, 16, "%x", asus_info->asl_compiler_revision);
494                 len += sprintf(page + len, "ASL comp revision  : 0x%s\n", buf);
495         }
496
497         return len;
498 }
499
500 /*
501  * /proc handlers
502  * We write our info in page, we begin at offset off and cannot write more
503  * than count bytes. We set eof to 1 if we handle those 2 values. We return the
504  * number of bytes written in page
505  */
506
507 /* Generic LED functions */
508 static int read_led(const char *ledname, int ledmask)
509 {
510         if (ledname) {
511                 int led_status;
512
513                 if (read_acpi_int(NULL, ledname, &led_status))
514                         return led_status;
515                 else
516                         printk(KERN_WARNING "Asus ACPI: Error reading LED "
517                                "status\n");
518         }
519         return (hotk->status & ledmask) ? 1 : 0;
520 }
521
522 static int parse_arg(const char __user * buf, unsigned long count, int *val)
523 {
524         char s[32];
525         if (!count)
526                 return 0;
527         if (count > 31)
528                 return -EINVAL;
529         if (copy_from_user(s, buf, count))
530                 return -EFAULT;
531         s[count] = 0;
532         if (sscanf(s, "%i", val) != 1)
533                 return -EINVAL;
534         return count;
535 }
536
537 /* FIXME: kill extraneous args so it can be called independently */
538 static int
539 write_led(const char __user * buffer, unsigned long count,
540           char *ledname, int ledmask, int invert)
541 {
542         int value;
543         int led_out = 0;
544
545         count = parse_arg(buffer, count, &value);
546         if (count > 0)
547                 led_out = value ? 1 : 0;
548
549         hotk->status =
550             (led_out) ? (hotk->status | ledmask) : (hotk->status & ~ledmask);
551
552         if (invert)             /* invert target value */
553                 led_out = !led_out & 0x1;
554
555         if (!write_acpi_int(hotk->handle, ledname, led_out, NULL))
556                 printk(KERN_WARNING "Asus ACPI: LED (%s) write failed\n",
557                        ledname);
558
559         return count;
560 }
561
562 /*
563  * Proc handlers for MLED
564  */
565 static int
566 proc_read_mled(char *page, char **start, off_t off, int count, int *eof,
567                void *data)
568 {
569         return sprintf(page, "%d\n",
570                        read_led(hotk->methods->mled_status, MLED_ON));
571 }
572
573 static int
574 proc_write_mled(struct file *file, const char __user * buffer,
575                 unsigned long count, void *data)
576 {
577         return write_led(buffer, count, hotk->methods->mt_mled, MLED_ON, 1);
578 }
579
580 /*
581  * Proc handlers for LED display
582  */
583 static int
584 proc_read_ledd(char *page, char **start, off_t off, int count, int *eof,
585                void *data)
586 {
587         return sprintf(page, "0x%08x\n", hotk->ledd_status);
588 }
589
590 static int
591 proc_write_ledd(struct file *file, const char __user * buffer,
592                 unsigned long count, void *data)
593 {
594         int value;
595
596         count = parse_arg(buffer, count, &value);
597         if (count > 0) {
598                 if (!write_acpi_int
599                     (hotk->handle, hotk->methods->mt_ledd, value, NULL))
600                         printk(KERN_WARNING
601                                "Asus ACPI: LED display write failed\n");
602                 else
603                         hotk->ledd_status = (u32) value;
604         } else if (count < 0)
605                 printk(KERN_WARNING "Asus ACPI: Error reading user input\n");
606
607         return count;
608 }
609
610 /*
611  * Proc handlers for WLED
612  */
613 static int
614 proc_read_wled(char *page, char **start, off_t off, int count, int *eof,
615                void *data)
616 {
617         return sprintf(page, "%d\n",
618                        read_led(hotk->methods->wled_status, WLED_ON));
619 }
620
621 static int
622 proc_write_wled(struct file *file, const char __user * buffer,
623                 unsigned long count, void *data)
624 {
625         return write_led(buffer, count, hotk->methods->mt_wled, WLED_ON, 0);
626 }
627
628 /*
629  * Proc handlers for TLED
630  */
631 static int
632 proc_read_tled(char *page, char **start, off_t off, int count, int *eof,
633                void *data)
634 {
635         return sprintf(page, "%d\n",
636                        read_led(hotk->methods->tled_status, TLED_ON));
637 }
638
639 static int
640 proc_write_tled(struct file *file, const char __user * buffer,
641                 unsigned long count, void *data)
642 {
643         return write_led(buffer, count, hotk->methods->mt_tled, TLED_ON, 0);
644 }
645
646 static int get_lcd_state(void)
647 {
648         int lcd = 0;
649
650         if (hotk->model != L3H) {
651                 /* We don't have to check anything if we are here */
652                 if (!read_acpi_int(NULL, hotk->methods->lcd_status, &lcd))
653                         printk(KERN_WARNING
654                                "Asus ACPI: Error reading LCD status\n");
655
656                 if (hotk->model == L2D)
657                         lcd = ~lcd;
658         } else {                /* L3H and the like have to be handled differently */
659                 acpi_status status = 0;
660                 struct acpi_object_list input;
661                 union acpi_object mt_params[2];
662                 struct acpi_buffer output;
663                 union acpi_object out_obj;
664
665                 input.count = 2;
666                 input.pointer = mt_params;
667                 /* Note: the following values are partly guessed up, but 
668                    otherwise they seem to work */
669                 mt_params[0].type = ACPI_TYPE_INTEGER;
670                 mt_params[0].integer.value = 0x02;
671                 mt_params[1].type = ACPI_TYPE_INTEGER;
672                 mt_params[1].integer.value = 0x02;
673
674                 output.length = sizeof(out_obj);
675                 output.pointer = &out_obj;
676
677                 status =
678                     acpi_evaluate_object(NULL, hotk->methods->lcd_status,
679                                          &input, &output);
680                 if (status != AE_OK)
681                         return -1;
682                 if (out_obj.type == ACPI_TYPE_INTEGER)
683                         /* That's what the AML code does */
684                         lcd = out_obj.integer.value >> 8;
685         }
686
687         return (lcd & 1);
688 }
689
690 static int set_lcd_state(int value)
691 {
692         int lcd = 0;
693         acpi_status status = 0;
694
695         lcd = value ? 1 : 0;
696         if (lcd != get_lcd_state()) {
697                 /* switch */
698                 if (hotk->model != L3H) {
699                         status =
700                             acpi_evaluate_object(NULL,
701                                                  hotk->methods->mt_lcd_switch,
702                                                  NULL, NULL);
703                 } else {        /* L3H and the like have to be handled differently */
704                         if (!write_acpi_int
705                             (hotk->handle, hotk->methods->mt_lcd_switch, 0x07,
706                              NULL))
707                                 status = AE_ERROR;
708                         /* L3H's AML executes EHK (0x07) upon Fn+F7 keypress, 
709                            the exact behaviour is simulated here */
710                 }
711                 if (ACPI_FAILURE(status))
712                         printk(KERN_WARNING "Asus ACPI: Error switching LCD\n");
713         }
714         return 0;
715
716 }
717
718 static int
719 proc_read_lcd(char *page, char **start, off_t off, int count, int *eof,
720               void *data)
721 {
722         return sprintf(page, "%d\n", get_lcd_state());
723 }
724
725 static int
726 proc_write_lcd(struct file *file, const char __user * buffer,
727                unsigned long count, void *data)
728 {
729         int value;
730
731         count = parse_arg(buffer, count, &value);
732         if (count > 0)
733                 set_lcd_state(value);
734         return count;
735 }
736
737 static int read_brightness(void)
738 {
739         int value;
740
741         if (hotk->methods->brightness_get) {    /* SPLV/GPLV laptop */
742                 if (!read_acpi_int(hotk->handle, hotk->methods->brightness_get,
743                                    &value))
744                         printk(KERN_WARNING
745                                "Asus ACPI: Error reading brightness\n");
746         } else if (hotk->methods->brightness_status) {  /* For D1 for example */
747                 if (!read_acpi_int(NULL, hotk->methods->brightness_status,
748                                    &value))
749                         printk(KERN_WARNING
750                                "Asus ACPI: Error reading brightness\n");
751         } else                  /* No GPLV method */
752                 value = hotk->brightness;
753         return value;
754 }
755
756 /*
757  * Change the brightness level
758  */
759 static void set_brightness(int value)
760 {
761         acpi_status status = 0;
762
763         /* SPLV laptop */
764         if (hotk->methods->brightness_set) {
765                 if (!write_acpi_int(hotk->handle, hotk->methods->brightness_set,
766                                     value, NULL))
767                         printk(KERN_WARNING
768                                "Asus ACPI: Error changing brightness\n");
769                 return;
770         }
771
772         /* No SPLV method if we are here, act as appropriate */
773         value -= read_brightness();
774         while (value != 0) {
775                 status = acpi_evaluate_object(NULL, (value > 0) ?
776                                               hotk->methods->brightness_up :
777                                               hotk->methods->brightness_down,
778                                               NULL, NULL);
779                 (value > 0) ? value-- : value++;
780                 if (ACPI_FAILURE(status))
781                         printk(KERN_WARNING
782                                "Asus ACPI: Error changing brightness\n");
783         }
784         return;
785 }
786
787 static int
788 proc_read_brn(char *page, char **start, off_t off, int count, int *eof,
789               void *data)
790 {
791         return sprintf(page, "%d\n", read_brightness());
792 }
793
794 static int
795 proc_write_brn(struct file *file, const char __user * buffer,
796                unsigned long count, void *data)
797 {
798         int value;
799
800         count = parse_arg(buffer, count, &value);
801         if (count > 0) {
802                 value = (0 < value) ? ((15 < value) ? 15 : value) : 0;
803                 /* 0 <= value <= 15 */
804                 set_brightness(value);
805         } else if (count < 0) {
806                 printk(KERN_WARNING "Asus ACPI: Error reading user input\n");
807         }
808
809         return count;
810 }
811
812 static void set_display(int value)
813 {
814         /* no sanity check needed for now */
815         if (!write_acpi_int(hotk->handle, hotk->methods->display_set,
816                             value, NULL))
817                 printk(KERN_WARNING "Asus ACPI: Error setting display\n");
818         return;
819 }
820
821 /*
822  * Now, *this* one could be more user-friendly, but so far, no-one has 
823  * complained. The significance of bits is the same as in proc_write_disp()
824  */
825 static int
826 proc_read_disp(char *page, char **start, off_t off, int count, int *eof,
827                void *data)
828 {
829         int value = 0;
830
831         if (!read_acpi_int(hotk->handle, hotk->methods->display_get, &value))
832                 printk(KERN_WARNING
833                        "Asus ACPI: Error reading display status\n");
834         value &= 0x07;          /* needed for some models, shouldn't hurt others */
835         return sprintf(page, "%d\n", value);
836 }
837
838 /*
839  * Experimental support for display switching. As of now: 1 should activate 
840  * the LCD output, 2 should do for CRT, and 4 for TV-Out. Any combination 
841  * (bitwise) of these will suffice. I never actually tested 3 displays hooked up 
842  * simultaneously, so be warned. See the acpi4asus README for more info.
843  */
844 static int
845 proc_write_disp(struct file *file, const char __user * buffer,
846                 unsigned long count, void *data)
847 {
848         int value;
849
850         count = parse_arg(buffer, count, &value);
851         if (count > 0)
852                 set_display(value);
853         else if (count < 0)
854                 printk(KERN_WARNING "Asus ACPI: Error reading user input\n");
855
856         return count;
857 }
858
859 typedef int (proc_readfunc) (char *page, char **start, off_t off, int count,
860                              int *eof, void *data);
861 typedef int (proc_writefunc) (struct file * file, const char __user * buffer,
862                               unsigned long count, void *data);
863
864 static int
865 asus_proc_add(char *name, proc_writefunc * writefunc,
866                      proc_readfunc * readfunc, mode_t mode,
867                      struct acpi_device *device)
868 {
869         struct proc_dir_entry *proc =
870             create_proc_entry(name, mode, acpi_device_dir(device));
871         if (!proc) {
872                 printk(KERN_WARNING "  Unable to create %s fs entry\n", name);
873                 return -1;
874         }
875         proc->write_proc = writefunc;
876         proc->read_proc = readfunc;
877         proc->data = acpi_driver_data(device);
878         proc->owner = THIS_MODULE;
879         proc->uid = asus_uid;
880         proc->gid = asus_gid;
881         return 0;
882 }
883
884 static int asus_hotk_add_fs(struct acpi_device *device)
885 {
886         struct proc_dir_entry *proc;
887         mode_t mode;
888
889         /*
890          * If parameter uid or gid is not changed, keep the default setting for
891          * our proc entries (-rw-rw-rw-) else, it means we care about security,
892          * and then set to -rw-rw----
893          */
894
895         if ((asus_uid == 0) && (asus_gid == 0)) {
896                 mode = S_IFREG | S_IRUGO | S_IWUGO;
897         } else {
898                 mode = S_IFREG | S_IRUSR | S_IRGRP | S_IWUSR | S_IWGRP;
899                 printk(KERN_WARNING "  asus_uid and asus_gid parameters are "
900                        "deprecated, use chown and chmod instead!\n");
901         }
902
903         acpi_device_dir(device) = asus_proc_dir;
904         if (!acpi_device_dir(device))
905                 return -ENODEV;
906
907         proc = create_proc_entry(PROC_INFO, mode, acpi_device_dir(device));
908         if (proc) {
909                 proc->read_proc = proc_read_info;
910                 proc->data = acpi_driver_data(device);
911                 proc->owner = THIS_MODULE;
912                 proc->uid = asus_uid;
913                 proc->gid = asus_gid;
914         } else {
915                 printk(KERN_WARNING "  Unable to create " PROC_INFO
916                        " fs entry\n");
917         }
918
919         if (hotk->methods->mt_wled) {
920                 asus_proc_add(PROC_WLED, &proc_write_wled, &proc_read_wled,
921                               mode, device);
922         }
923
924         if (hotk->methods->mt_ledd) {
925                 asus_proc_add(PROC_LEDD, &proc_write_ledd, &proc_read_ledd,
926                               mode, device);
927         }
928
929         if (hotk->methods->mt_mled) {
930                 asus_proc_add(PROC_MLED, &proc_write_mled, &proc_read_mled,
931                               mode, device);
932         }
933
934         if (hotk->methods->mt_tled) {
935                 asus_proc_add(PROC_TLED, &proc_write_tled, &proc_read_tled,
936                               mode, device);
937         }
938
939         /* 
940          * We need both read node and write method as LCD switch is also accessible
941          * from keyboard 
942          */
943         if (hotk->methods->mt_lcd_switch && hotk->methods->lcd_status) {
944                 asus_proc_add(PROC_LCD, &proc_write_lcd, &proc_read_lcd, mode,
945                               device);
946         }
947
948         if ((hotk->methods->brightness_up && hotk->methods->brightness_down) ||
949             (hotk->methods->brightness_get && hotk->methods->brightness_set)) {
950                 asus_proc_add(PROC_BRN, &proc_write_brn, &proc_read_brn, mode,
951                               device);
952         }
953
954         if (hotk->methods->display_set) {
955                 asus_proc_add(PROC_DISP, &proc_write_disp, &proc_read_disp,
956                               mode, device);
957         }
958
959         return 0;
960 }
961
962 static int asus_hotk_remove_fs(struct acpi_device *device)
963 {
964         if (acpi_device_dir(device)) {
965                 remove_proc_entry(PROC_INFO, acpi_device_dir(device));
966                 if (hotk->methods->mt_wled)
967                         remove_proc_entry(PROC_WLED, acpi_device_dir(device));
968                 if (hotk->methods->mt_mled)
969                         remove_proc_entry(PROC_MLED, acpi_device_dir(device));
970                 if (hotk->methods->mt_tled)
971                         remove_proc_entry(PROC_TLED, acpi_device_dir(device));
972                 if (hotk->methods->mt_ledd)
973                         remove_proc_entry(PROC_LEDD, acpi_device_dir(device));
974                 if (hotk->methods->mt_lcd_switch && hotk->methods->lcd_status)
975                         remove_proc_entry(PROC_LCD, acpi_device_dir(device));
976                 if ((hotk->methods->brightness_up
977                      && hotk->methods->brightness_down)
978                     || (hotk->methods->brightness_get
979                         && hotk->methods->brightness_set))
980                         remove_proc_entry(PROC_BRN, acpi_device_dir(device));
981                 if (hotk->methods->display_set)
982                         remove_proc_entry(PROC_DISP, acpi_device_dir(device));
983         }
984         return 0;
985 }
986
987 static void asus_hotk_notify(acpi_handle handle, u32 event, void *data)
988 {
989         /* TODO Find a better way to handle events count. */
990         if (!hotk)
991                 return;
992
993         if ((event & ~((u32) BR_UP)) < 16) {
994                 hotk->brightness = (event & ~((u32) BR_UP));
995         } else if ((event & ~((u32) BR_DOWN)) < 16) {
996                 hotk->brightness = (event & ~((u32) BR_DOWN));
997         }
998
999         acpi_bus_generate_event(hotk->device, event,
1000                                 hotk->event_count[event % 128]++);
1001
1002         return;
1003 }
1004
1005 /*
1006  * This function is used to initialize the hotk with right values. In this
1007  * method, we can make all the detection we want, and modify the hotk struct
1008  */
1009 static int asus_hotk_get_info(void)
1010 {
1011         struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
1012         struct acpi_buffer dsdt = { ACPI_ALLOCATE_BUFFER, NULL };
1013         union acpi_object *model = NULL;
1014         int bsts_result;
1015         acpi_status status;
1016
1017         /*
1018          * Get DSDT headers early enough to allow for differentiating between 
1019          * models, but late enough to allow acpi_bus_register_driver() to fail 
1020          * before doing anything ACPI-specific. Should we encounter a machine,
1021          * which needs special handling (i.e. its hotkey device has a different
1022          * HID), this bit will be moved. A global variable asus_info contains
1023          * the DSDT header.
1024          */
1025         status = acpi_get_table(ACPI_TABLE_ID_DSDT, 1, &dsdt);
1026         if (ACPI_FAILURE(status))
1027                 printk(KERN_WARNING "  Couldn't get the DSDT table header\n");
1028         else
1029                 asus_info = (struct acpi_table_header *)dsdt.pointer;
1030
1031         /* We have to write 0 on init this far for all ASUS models */
1032         if (!write_acpi_int(hotk->handle, "INIT", 0, &buffer)) {
1033                 printk(KERN_ERR "  Hotkey initialization failed\n");
1034                 return -ENODEV;
1035         }
1036
1037         /* This needs to be called for some laptops to init properly */
1038         if (!read_acpi_int(hotk->handle, "BSTS", &bsts_result))
1039                 printk(KERN_WARNING "  Error calling BSTS\n");
1040         else if (bsts_result)
1041                 printk(KERN_NOTICE "  BSTS called, 0x%02x returned\n",
1042                        bsts_result);
1043
1044         /* This is unlikely with implicit return */
1045         if (buffer.pointer == NULL)
1046                 return -EINVAL;
1047
1048         model = (union acpi_object *)buffer.pointer;
1049         /*
1050          * Samsung P30 has a device with a valid _HID whose INIT does not 
1051          * return anything. It used to be possible to catch this exception,
1052          * but the implicit return code will now happily confuse the 
1053          * driver. We assume that every ACPI_TYPE_STRING is a valid model
1054          * identifier but it's still possible to get completely bogus data.
1055          */
1056         if (model->type == ACPI_TYPE_STRING) {
1057                 printk(KERN_NOTICE "  %s model detected, ",
1058                        model->string.pointer);
1059         } else {
1060                 if (asus_info &&        /* Samsung P30 */
1061                     strncmp(asus_info->oem_table_id, "ODEM", 4) == 0) {
1062                         hotk->model = P30;
1063                         printk(KERN_NOTICE
1064                                "  Samsung P30 detected, supported\n");
1065                 } else {
1066                         hotk->model = M2E;
1067                         printk(KERN_WARNING "  no string returned by INIT\n");
1068                         printk(KERN_WARNING "  trying default values, supply "
1069                                "the developers with your DSDT\n");
1070                 }
1071                 hotk->methods = &model_conf[hotk->model];
1072
1073                 kfree(model);
1074
1075                 return AE_OK;
1076         }
1077
1078         hotk->model = END_MODEL;
1079         if (strncmp(model->string.pointer, "L3D", 3) == 0)
1080                 hotk->model = L3D;
1081         else if (strncmp(model->string.pointer, "L3H", 3) == 0 ||
1082                  strncmp(model->string.pointer, "L2E", 3) == 0)
1083                 hotk->model = L3H;
1084         else if (strncmp(model->string.pointer, "L3", 2) == 0 ||
1085                  strncmp(model->string.pointer, "L2B", 3) == 0)
1086                 hotk->model = L3C;
1087         else if (strncmp(model->string.pointer, "L8L", 3) == 0)
1088                 hotk->model = L8L;
1089         else if (strncmp(model->string.pointer, "L4R", 3) == 0)
1090                 hotk->model = L4R;
1091         else if (strncmp(model->string.pointer, "M6N", 3) == 0 ||
1092                  strncmp(model->string.pointer, "W3N", 3) == 0)
1093                 hotk->model = M6N;
1094         else if (strncmp(model->string.pointer, "M6R", 3) == 0 ||
1095                  strncmp(model->string.pointer, "A3G", 3) == 0)
1096                 hotk->model = M6R;
1097         else if (strncmp(model->string.pointer, "M2N", 3) == 0 ||
1098                  strncmp(model->string.pointer, "M3N", 3) == 0 ||
1099                  strncmp(model->string.pointer, "M5N", 3) == 0 ||
1100                  strncmp(model->string.pointer, "M6N", 3) == 0 ||
1101                  strncmp(model->string.pointer, "S1N", 3) == 0 ||
1102                  strncmp(model->string.pointer, "S5N", 3) == 0)
1103                 hotk->model = xxN;
1104         else if (strncmp(model->string.pointer, "M1", 2) == 0)
1105                 hotk->model = M1A;
1106         else if (strncmp(model->string.pointer, "M2", 2) == 0 ||
1107                  strncmp(model->string.pointer, "L4E", 3) == 0)
1108                 hotk->model = M2E;
1109         else if (strncmp(model->string.pointer, "L2", 2) == 0)
1110                 hotk->model = L2D;
1111         else if (strncmp(model->string.pointer, "L8", 2) == 0)
1112                 hotk->model = S1x;
1113         else if (strncmp(model->string.pointer, "D1", 2) == 0)
1114                 hotk->model = D1x;
1115         else if (strncmp(model->string.pointer, "A1", 2) == 0)
1116                 hotk->model = A1x;
1117         else if (strncmp(model->string.pointer, "A2", 2) == 0)
1118                 hotk->model = A2x;
1119         else if (strncmp(model->string.pointer, "J1", 2) == 0)
1120                 hotk->model = S2x;
1121         else if (strncmp(model->string.pointer, "L5", 2) == 0)
1122                 hotk->model = L5x;
1123         else if (strncmp(model->string.pointer, "A4G", 3) == 0)
1124                 hotk->model = A4G;
1125         else if (strncmp(model->string.pointer, "W1N", 3) == 0)
1126                 hotk->model = W1N;
1127
1128         if (hotk->model == END_MODEL) {
1129                 printk("unsupported, trying default values, supply the "
1130                        "developers with your DSDT\n");
1131                 hotk->model = M2E;
1132         } else {
1133                 printk("supported\n");
1134         }
1135
1136         hotk->methods = &model_conf[hotk->model];
1137
1138         /* Sort of per-model blacklist */
1139         if (strncmp(model->string.pointer, "L2B", 3) == 0)
1140                 hotk->methods->lcd_status = NULL;
1141         /* L2B is similar enough to L3C to use its settings, with this only 
1142            exception */
1143         else if (strncmp(model->string.pointer, "A3G", 3) == 0)
1144                 hotk->methods->lcd_status = "\\BLFG";
1145         /* A3G is like M6R */
1146         else if (strncmp(model->string.pointer, "S5N", 3) == 0 ||
1147                  strncmp(model->string.pointer, "M5N", 3) == 0 ||
1148                  strncmp(model->string.pointer, "W3N", 3) == 0)
1149                 hotk->methods->mt_mled = NULL;
1150         /* S5N, M5N and W3N have no MLED */
1151         else if (strncmp(model->string.pointer, "M2N", 3) == 0)
1152                 hotk->methods->mt_wled = "WLED";
1153         /* M2N has a usable WLED */
1154         else if (asus_info) {
1155                 if (strncmp(asus_info->oem_table_id, "L1", 2) == 0)
1156                         hotk->methods->mled_status = NULL;
1157                 /* S1300A reports L84F, but L1400B too, account for that */
1158         }
1159
1160         kfree(model);
1161
1162         return AE_OK;
1163 }
1164
1165 static int asus_hotk_check(void)
1166 {
1167         int result = 0;
1168
1169         result = acpi_bus_get_status(hotk->device);
1170         if (result)
1171                 return result;
1172
1173         if (hotk->device->status.present) {
1174                 result = asus_hotk_get_info();
1175         } else {
1176                 printk(KERN_ERR "  Hotkey device not present, aborting\n");
1177                 return -EINVAL;
1178         }
1179
1180         return result;
1181 }
1182
1183 static int asus_hotk_found;
1184
1185 static int asus_hotk_add(struct acpi_device *device)
1186 {
1187         acpi_status status = AE_OK;
1188         int result;
1189
1190         if (!device)
1191                 return -EINVAL;
1192
1193         printk(KERN_NOTICE "Asus Laptop ACPI Extras version %s\n",
1194                ASUS_ACPI_VERSION);
1195
1196         hotk =
1197             (struct asus_hotk *)kmalloc(sizeof(struct asus_hotk), GFP_KERNEL);
1198         if (!hotk)
1199                 return -ENOMEM;
1200         memset(hotk, 0, sizeof(struct asus_hotk));
1201
1202         hotk->handle = device->handle;
1203         strcpy(acpi_device_name(device), ACPI_HOTK_DEVICE_NAME);
1204         strcpy(acpi_device_class(device), ACPI_HOTK_CLASS);
1205         acpi_driver_data(device) = hotk;
1206         hotk->device = device;
1207
1208         result = asus_hotk_check();
1209         if (result)
1210                 goto end;
1211
1212         result = asus_hotk_add_fs(device);
1213         if (result)
1214                 goto end;
1215
1216         /*
1217          * We install the handler, it will receive the hotk in parameter, so, we
1218          * could add other data to the hotk struct
1219          */
1220         status = acpi_install_notify_handler(hotk->handle, ACPI_SYSTEM_NOTIFY,
1221                                              asus_hotk_notify, hotk);
1222         if (ACPI_FAILURE(status))
1223                 printk(KERN_ERR "  Error installing notify handler\n");
1224
1225         /* For laptops without GPLV: init the hotk->brightness value */
1226         if ((!hotk->methods->brightness_get)
1227             && (!hotk->methods->brightness_status)
1228             && (hotk->methods->brightness_up && hotk->methods->brightness_down)) {
1229                 status =
1230                     acpi_evaluate_object(NULL, hotk->methods->brightness_down,
1231                                          NULL, NULL);
1232                 if (ACPI_FAILURE(status))
1233                         printk(KERN_WARNING "  Error changing brightness\n");
1234                 else {
1235                         status =
1236                             acpi_evaluate_object(NULL,
1237                                                  hotk->methods->brightness_up,
1238                                                  NULL, NULL);
1239                         if (ACPI_FAILURE(status))
1240                                 printk(KERN_WARNING "  Strange, error changing"
1241                                        " brightness\n");
1242                 }
1243         }
1244
1245         asus_hotk_found = 1;
1246
1247         /* LED display is off by default */
1248         hotk->ledd_status = 0xFFF;
1249
1250       end:
1251         if (result) {
1252                 kfree(hotk);
1253         }
1254
1255         return result;
1256 }
1257
1258 static int asus_hotk_remove(struct acpi_device *device, int type)
1259 {
1260         acpi_status status = 0;
1261
1262         if (!device || !acpi_driver_data(device))
1263                 return -EINVAL;
1264
1265         status = acpi_remove_notify_handler(hotk->handle, ACPI_SYSTEM_NOTIFY,
1266                                             asus_hotk_notify);
1267         if (ACPI_FAILURE(status))
1268                 printk(KERN_ERR "Asus ACPI: Error removing notify handler\n");
1269
1270         asus_hotk_remove_fs(device);
1271
1272         kfree(hotk);
1273
1274         return 0;
1275 }
1276
1277 static int __init asus_acpi_init(void)
1278 {
1279         int result;
1280
1281         if (acpi_disabled)
1282                 return -ENODEV;
1283
1284         if (!acpi_specific_hotkey_enabled) {
1285                 printk(KERN_ERR "Using generic hotkey driver\n");
1286                 return -ENODEV;
1287         }
1288         asus_proc_dir = proc_mkdir(PROC_ASUS, acpi_root_dir);
1289         if (!asus_proc_dir) {
1290                 printk(KERN_ERR "Asus ACPI: Unable to create /proc entry\n");
1291                 return -ENODEV;
1292         }
1293         asus_proc_dir->owner = THIS_MODULE;
1294
1295         result = acpi_bus_register_driver(&asus_hotk_driver);
1296         if (result < 0) {
1297                 remove_proc_entry(PROC_ASUS, acpi_root_dir);
1298                 return result;
1299         }
1300
1301         /*
1302          * This is a bit of a kludge.  We only want this module loaded
1303          * for ASUS systems, but there's currently no way to probe the
1304          * ACPI namespace for ASUS HIDs.  So we just return failure if
1305          * we didn't find one, which will cause the module to be
1306          * unloaded.
1307          */
1308         if (!asus_hotk_found) {
1309                 acpi_bus_unregister_driver(&asus_hotk_driver);
1310                 remove_proc_entry(PROC_ASUS, acpi_root_dir);
1311                 return result;
1312         }
1313
1314         return 0;
1315 }
1316
1317 static void __exit asus_acpi_exit(void)
1318 {
1319         acpi_bus_unregister_driver(&asus_hotk_driver);
1320         remove_proc_entry(PROC_ASUS, acpi_root_dir);
1321
1322         kfree(asus_info);
1323
1324         return;
1325 }
1326
1327 module_init(asus_acpi_init);
1328 module_exit(asus_acpi_exit);