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mwl8k: allow setting HT channels
[linux-2.6/kvm.git] / drivers / platform / x86 / asus_acpi.c
blobddf5240ade8cc0e10358553382ffa68716933ce0
1 /*
2 * asus_acpi.c - Asus Laptop ACPI Extras
3 *
4 *
5 * Copyright (C) 2002-2005 Julien Lerouge, 2003-2006 Karol Kozimor
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20 *
21 *
22 * The development page for this driver is located at
23 * http://sourceforge.net/projects/acpi4asus/
24 *
25 * Credits:
26 * Pontus Fuchs - Helper functions, cleanup
27 * Johann Wiesner - Small compile fixes
28 * John Belmonte - ACPI code for Toshiba laptop was a good starting point.
29 * �ic Burghard - LED display support for W1N
30 *
31 */
32
33 #include <linux/kernel.h>
34 #include <linux/module.h>
35 #include <linux/init.h>
36 #include <linux/types.h>
37 #include <linux/proc_fs.h>
38 #include <linux/backlight.h>
39 #include <acpi/acpi_drivers.h>
40 #include <acpi/acpi_bus.h>
41 #include <asm/uaccess.h>
42
43 #define ASUS_ACPI_VERSION "0.30"
44
45 #define PROC_ASUS "asus" /* The directory */
46 #define PROC_MLED "mled"
47 #define PROC_WLED "wled"
48 #define PROC_TLED "tled"
49 #define PROC_BT "bluetooth"
50 #define PROC_LEDD "ledd"
51 #define PROC_INFO "info"
52 #define PROC_LCD "lcd"
53 #define PROC_BRN "brn"
54 #define PROC_DISP "disp"
55
56 #define ACPI_HOTK_NAME "Asus Laptop ACPI Extras Driver"
57 #define ACPI_HOTK_CLASS "hotkey"
58 #define ACPI_HOTK_DEVICE_NAME "Hotkey"
59
60 /*
61 * Some events we use, same for all Asus
62 */
63 #define BR_UP 0x10
64 #define BR_DOWN 0x20
65
66 /*
67 * Flags for hotk status
68 */
69 #define MLED_ON 0x01 /* Mail LED */
70 #define WLED_ON 0x02 /* Wireless LED */
71 #define TLED_ON 0x04 /* Touchpad LED */
72 #define BT_ON 0x08 /* Internal Bluetooth */
73
74 MODULE_AUTHOR("Julien Lerouge, Karol Kozimor");
75 MODULE_DESCRIPTION(ACPI_HOTK_NAME);
76 MODULE_LICENSE("GPL");
77
78 static uid_t asus_uid;
79 static gid_t asus_gid;
80 module_param(asus_uid, uint, 0);
81 MODULE_PARM_DESC(asus_uid, "UID for entries in /proc/acpi/asus");
82 module_param(asus_gid, uint, 0);
83 MODULE_PARM_DESC(asus_gid, "GID for entries in /proc/acpi/asus");
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; /* method to set brightness down ____A */
102 char *brightness_set; /* method to set absolute brightness_R */
103 char *brightness_get; /* method to get absolute brightness_R */
104 char *brightness_status;/* node to get brightness____________A */
105 char *display_set; /* method to set video output________R */
106 char *display_get; /* method to get video output________R */
107 };
108
109 /*
110 * This is the main structure, we can use it to store anything interesting
111 * about the hotk device
112 */
113 struct asus_hotk {
114 struct acpi_device *device; /* the device we are in */
115 acpi_handle handle; /* the handle of the hotk device */
116 char status; /* status of the hotk, for LEDs */
117 u32 ledd_status; /* status of the LED display */
118 struct model_data *methods; /* methods available on the laptop */
119 u8 brightness; /* brightness level */
120 enum {
121 A1x = 0, /* A1340D, A1300F */
122 A2x, /* A2500H */
123 A4G, /* A4700G */
124 D1x, /* D1 */
125 L2D, /* L2000D */
126 L3C, /* L3800C */
127 L3D, /* L3400D */
128 L3H, /* L3H, L2000E, L5D */
129 L4R, /* L4500R */
130 L5x, /* L5800C */
131 L8L, /* L8400L */
132 M1A, /* M1300A */
133 M2E, /* M2400E, L4400L */
134 M6N, /* M6800N, W3400N */
135 M6R, /* M6700R, A3000G */
136 P30, /* Samsung P30 */
137 S1x, /* S1300A, but also L1400B and M2400A (L84F) */
138 S2x, /* S200 (J1 reported), Victor MP-XP7210 */
139 W1N, /* W1000N */
140 W5A, /* W5A */
141 W3V, /* W3030V */
142 xxN, /* M2400N, M3700N, M5200N, M6800N,
143 S1300N, S5200N*/
144 A4S, /* Z81sp */
145 F3Sa, /* (Centrino) */
146 R1F,
147 END_MODEL
148 } model; /* Models currently supported */
149 u16 event_count[128]; /* Count for each event TODO make this better */
150 };
151
152 /* Here we go */
153 #define A1x_PREFIX "\\_SB.PCI0.ISA.EC0."
154 #define L3C_PREFIX "\\_SB.PCI0.PX40.ECD0."
155 #define M1A_PREFIX "\\_SB.PCI0.PX40.EC0."
156 #define P30_PREFIX "\\_SB.PCI0.LPCB.EC0."
157 #define S1x_PREFIX "\\_SB.PCI0.PX40."
158 #define S2x_PREFIX A1x_PREFIX
159 #define xxN_PREFIX "\\_SB.PCI0.SBRG.EC0."
160
161 static struct model_data model_conf[END_MODEL] = {
162 /*
163 * TODO I have seen a SWBX and AIBX method on some models, like L1400B,
164 * it seems to be a kind of switch, but what for ?
165 */
166
167 {
168 .name = "A1x",
169 .mt_mled = "MLED",
170 .mled_status = "\\MAIL",
171 .mt_lcd_switch = A1x_PREFIX "_Q10",
172 .lcd_status = "\\BKLI",
173 .brightness_up = A1x_PREFIX "_Q0E",
174 .brightness_down = A1x_PREFIX "_Q0F"},
175
176 {
177 .name = "A2x",
178 .mt_mled = "MLED",
179 .mt_wled = "WLED",
180 .wled_status = "\\SG66",
181 .mt_lcd_switch = "\\Q10",
182 .lcd_status = "\\BAOF",
183 .brightness_set = "SPLV",
184 .brightness_get = "GPLV",
185 .display_set = "SDSP",
186 .display_get = "\\INFB"},
187
188 {
189 .name = "A4G",
190 .mt_mled = "MLED",
191 /* WLED present, but not controlled by ACPI */
192 .mt_lcd_switch = xxN_PREFIX "_Q10",
193 .brightness_set = "SPLV",
194 .brightness_get = "GPLV",
195 .display_set = "SDSP",
196 .display_get = "\\ADVG"},
197
198 {
199 .name = "D1x",
200 .mt_mled = "MLED",
201 .mt_lcd_switch = "\\Q0D",
202 .lcd_status = "\\GP11",
203 .brightness_up = "\\Q0C",
204 .brightness_down = "\\Q0B",
205 .brightness_status = "\\BLVL",
206 .display_set = "SDSP",
207 .display_get = "\\INFB"},
208
209 {
210 .name = "L2D",
211 .mt_mled = "MLED",
212 .mled_status = "\\SGP6",
213 .mt_wled = "WLED",
214 .wled_status = "\\RCP3",
215 .mt_lcd_switch = "\\Q10",
216 .lcd_status = "\\SGP0",
217 .brightness_up = "\\Q0E",
218 .brightness_down = "\\Q0F",
219 .display_set = "SDSP",
220 .display_get = "\\INFB"},
221
222 {
223 .name = "L3C",
224 .mt_mled = "MLED",
225 .mt_wled = "WLED",
226 .mt_lcd_switch = L3C_PREFIX "_Q10",
227 .lcd_status = "\\GL32",
228 .brightness_set = "SPLV",
229 .brightness_get = "GPLV",
230 .display_set = "SDSP",
231 .display_get = "\\_SB.PCI0.PCI1.VGAC.NMAP"},
232
233 {
234 .name = "L3D",
235 .mt_mled = "MLED",
236 .mled_status = "\\MALD",
237 .mt_wled = "WLED",
238 .mt_lcd_switch = "\\Q10",
239 .lcd_status = "\\BKLG",
240 .brightness_set = "SPLV",
241 .brightness_get = "GPLV",
242 .display_set = "SDSP",
243 .display_get = "\\INFB"},
244
245 {
246 .name = "L3H",
247 .mt_mled = "MLED",
248 .mt_wled = "WLED",
249 .mt_lcd_switch = "EHK",
250 .lcd_status = "\\_SB.PCI0.PM.PBC",
251 .brightness_set = "SPLV",
252 .brightness_get = "GPLV",
253 .display_set = "SDSP",
254 .display_get = "\\INFB"},
255
256 {
257 .name = "L4R",
258 .mt_mled = "MLED",
259 .mt_wled = "WLED",
260 .wled_status = "\\_SB.PCI0.SBRG.SG13",
261 .mt_lcd_switch = xxN_PREFIX "_Q10",
262 .lcd_status = "\\_SB.PCI0.SBSM.SEO4",
263 .brightness_set = "SPLV",
264 .brightness_get = "GPLV",
265 .display_set = "SDSP",
266 .display_get = "\\_SB.PCI0.P0P1.VGA.GETD"},
267
268 {
269 .name = "L5x",
270 .mt_mled = "MLED",
271 /* WLED present, but not controlled by ACPI */
272 .mt_tled = "TLED",
273 .mt_lcd_switch = "\\Q0D",
274 .lcd_status = "\\BAOF",
275 .brightness_set = "SPLV",
276 .brightness_get = "GPLV",
277 .display_set = "SDSP",
278 .display_get = "\\INFB"},
279
280 {
281 .name = "L8L"
282 /* No features, but at least support the hotkeys */
283 },
284
285 {
286 .name = "M1A",
287 .mt_mled = "MLED",
288 .mt_lcd_switch = M1A_PREFIX "Q10",
289 .lcd_status = "\\PNOF",
290 .brightness_up = M1A_PREFIX "Q0E",
291 .brightness_down = M1A_PREFIX "Q0F",
292 .brightness_status = "\\BRIT",
293 .display_set = "SDSP",
294 .display_get = "\\INFB"},
295
296 {
297 .name = "M2E",
298 .mt_mled = "MLED",
299 .mt_wled = "WLED",
300 .mt_lcd_switch = "\\Q10",
301 .lcd_status = "\\GP06",
302 .brightness_set = "SPLV",
303 .brightness_get = "GPLV",
304 .display_set = "SDSP",
305 .display_get = "\\INFB"},
306
307 {
308 .name = "M6N",
309 .mt_mled = "MLED",
310 .mt_wled = "WLED",
311 .wled_status = "\\_SB.PCI0.SBRG.SG13",
312 .mt_lcd_switch = xxN_PREFIX "_Q10",
313 .lcd_status = "\\_SB.BKLT",
314 .brightness_set = "SPLV",
315 .brightness_get = "GPLV",
316 .display_set = "SDSP",
317 .display_get = "\\SSTE"},
318
319 {
320 .name = "M6R",
321 .mt_mled = "MLED",
322 .mt_wled = "WLED",
323 .mt_lcd_switch = xxN_PREFIX "_Q10",
324 .lcd_status = "\\_SB.PCI0.SBSM.SEO4",
325 .brightness_set = "SPLV",
326 .brightness_get = "GPLV",
327 .display_set = "SDSP",
328 .display_get = "\\_SB.PCI0.P0P1.VGA.GETD"},
329
330 {
331 .name = "P30",
332 .mt_wled = "WLED",
333 .mt_lcd_switch = P30_PREFIX "_Q0E",
334 .lcd_status = "\\BKLT",
335 .brightness_up = P30_PREFIX "_Q68",
336 .brightness_down = P30_PREFIX "_Q69",
337 .brightness_get = "GPLV",
338 .display_set = "SDSP",
339 .display_get = "\\DNXT"},
340
341 {
342 .name = "S1x",
343 .mt_mled = "MLED",
344 .mled_status = "\\EMLE",
345 .mt_wled = "WLED",
346 .mt_lcd_switch = S1x_PREFIX "Q10",
347 .lcd_status = "\\PNOF",
348 .brightness_set = "SPLV",
349 .brightness_get = "GPLV"},
350
351 {
352 .name = "S2x",
353 .mt_mled = "MLED",
354 .mled_status = "\\MAIL",
355 .mt_lcd_switch = S2x_PREFIX "_Q10",
356 .lcd_status = "\\BKLI",
357 .brightness_up = S2x_PREFIX "_Q0B",
358 .brightness_down = S2x_PREFIX "_Q0A"},
359
360 {
361 .name = "W1N",
362 .mt_mled = "MLED",
363 .mt_wled = "WLED",
364 .mt_ledd = "SLCM",
365 .mt_lcd_switch = xxN_PREFIX "_Q10",
366 .lcd_status = "\\BKLT",
367 .brightness_set = "SPLV",
368 .brightness_get = "GPLV",
369 .display_set = "SDSP",
370 .display_get = "\\ADVG"},
371
372 {
373 .name = "W5A",
374 .mt_bt_switch = "BLED",
375 .mt_wled = "WLED",
376 .mt_lcd_switch = xxN_PREFIX "_Q10",
377 .brightness_set = "SPLV",
378 .brightness_get = "GPLV",
379 .display_set = "SDSP",
380 .display_get = "\\ADVG"},
381
382 {
383 .name = "W3V",
384 .mt_mled = "MLED",
385 .mt_wled = "WLED",
386 .mt_lcd_switch = xxN_PREFIX "_Q10",
387 .lcd_status = "\\BKLT",
388 .brightness_set = "SPLV",
389 .brightness_get = "GPLV",
390 .display_set = "SDSP",
391 .display_get = "\\INFB"},
392
393 {
394 .name = "xxN",
395 .mt_mled = "MLED",
396 /* WLED present, but not controlled by ACPI */
397 .mt_lcd_switch = xxN_PREFIX "_Q10",
398 .lcd_status = "\\BKLT",
399 .brightness_set = "SPLV",
400 .brightness_get = "GPLV",
401 .display_set = "SDSP",
402 .display_get = "\\ADVG"},
403
404 {
405 .name = "A4S",
406 .brightness_set = "SPLV",
407 .brightness_get = "GPLV",
408 .mt_bt_switch = "BLED",
409 .mt_wled = "WLED"
410 },
411
412 {
413 .name = "F3Sa",
414 .mt_bt_switch = "BLED",
415 .mt_wled = "WLED",
416 .mt_mled = "MLED",
417 .brightness_get = "GPLV",
418 .brightness_set = "SPLV",
419 .mt_lcd_switch = "\\_SB.PCI0.SBRG.EC0._Q10",
420 .lcd_status = "\\_SB.PCI0.SBRG.EC0.RPIN",
421 .display_get = "\\ADVG",
422 .display_set = "SDSP",
423 },
424 {
425 .name = "R1F",
426 .mt_bt_switch = "BLED",
427 .mt_mled = "MLED",
428 .mt_wled = "WLED",
429 .mt_lcd_switch = "\\Q10",
430 .lcd_status = "\\GP06",
431 .brightness_set = "SPLV",
432 .brightness_get = "GPLV",
433 .display_set = "SDSP",
434 .display_get = "\\INFB"
435 }
436 };
437
438 /* procdir we use */
439 static struct proc_dir_entry *asus_proc_dir;
440
441 static struct backlight_device *asus_backlight_device;
442
443 /*
444 * This header is made available to allow proper configuration given model,
445 * revision number , ... this info cannot go in struct asus_hotk because it is
446 * available before the hotk
447 */
448 static struct acpi_table_header *asus_info;
449
450 /* The actual device the driver binds to */
451 static struct asus_hotk *hotk;
452
453 /*
454 * The hotkey driver and autoloading declaration
455 */
456 static int asus_hotk_add(struct acpi_device *device);
457 static int asus_hotk_remove(struct acpi_device *device, int type);
458 static void asus_hotk_notify(struct acpi_device *device, u32 event);
459
460 static const struct acpi_device_id asus_device_ids[] = {
461 {"ATK0100", 0},
462 {"", 0},
463 };
464 MODULE_DEVICE_TABLE(acpi, asus_device_ids);
465
466 static struct acpi_driver asus_hotk_driver = {
467 .name = "asus_acpi",
468 .class = ACPI_HOTK_CLASS,
469 .ids = asus_device_ids,
470 .flags = ACPI_DRIVER_ALL_NOTIFY_EVENTS,
471 .ops = {
472 .add = asus_hotk_add,
473 .remove = asus_hotk_remove,
474 .notify = asus_hotk_notify,
475 },
476 };
477
478 /*
479 * This function evaluates an ACPI method, given an int as parameter, the
480 * method is searched within the scope of the handle, can be NULL. The output
481 * of the method is written is output, which can also be NULL
482 *
483 * returns 1 if write is successful, 0 else.
484 */
485 static int write_acpi_int(acpi_handle handle, const char *method, int val,
486 struct acpi_buffer *output)
487 {
488 struct acpi_object_list params; /* list of input parameters (int) */
489 union acpi_object in_obj; /* the only param we use */
490 acpi_status status;
491
492 params.count = 1;
493 params.pointer = &in_obj;
494 in_obj.type = ACPI_TYPE_INTEGER;
495 in_obj.integer.value = val;
496
497 status = acpi_evaluate_object(handle, (char *)method, &params, output);
498 return (status == AE_OK);
499 }
500
501 static int read_acpi_int(acpi_handle handle, const char *method, int *val)
502 {
503 struct acpi_buffer output;
504 union acpi_object out_obj;
505 acpi_status status;
506
507 output.length = sizeof(out_obj);
508 output.pointer = &out_obj;
509
510 status = acpi_evaluate_object(handle, (char *)method, NULL, &output);
511 *val = out_obj.integer.value;
512 return (status == AE_OK) && (out_obj.type == ACPI_TYPE_INTEGER);
513 }
514
515 /*
516 * We write our info in page, we begin at offset off and cannot write more
517 * than count bytes. We set eof to 1 if we handle those 2 values. We return the
518 * number of bytes written in page
519 */
520 static int
521 proc_read_info(char *page, char **start, off_t off, int count, int *eof,
522 void *data)
523 {
524 int len = 0;
525 int temp;
526 char buf[16]; /* enough for all info */
527 /*
528 * We use the easy way, we don't care of off and count,
529 * so we don't set eof to 1
530 */
531
532 len += sprintf(page, ACPI_HOTK_NAME " " ASUS_ACPI_VERSION "\n");
533 len += sprintf(page + len, "Model reference : %s\n",
534 hotk->methods->name);
535 /*
536 * The SFUN method probably allows the original driver to get the list
537 * of features supported by a given model. For now, 0x0100 or 0x0800
538 * bit signifies that the laptop is equipped with a Wi-Fi MiniPCI card.
539 * The significance of others is yet to be found.
540 */
541 if (read_acpi_int(hotk->handle, "SFUN", &temp))
542 len +=
543 sprintf(page + len, "SFUN value : 0x%04x\n", temp);
544 /*
545 * Another value for userspace: the ASYM method returns 0x02 for
546 * battery low and 0x04 for battery critical, its readings tend to be
547 * more accurate than those provided by _BST.
548 * Note: since not all the laptops provide this method, errors are
549 * silently ignored.
550 */
551 if (read_acpi_int(hotk->handle, "ASYM", &temp))
552 len +=
553 sprintf(page + len, "ASYM value : 0x%04x\n", temp);
554 if (asus_info) {
555 snprintf(buf, 16, "%d", asus_info->length);
556 len += sprintf(page + len, "DSDT length : %s\n", buf);
557 snprintf(buf, 16, "%d", asus_info->checksum);
558 len += sprintf(page + len, "DSDT checksum : %s\n", buf);
559 snprintf(buf, 16, "%d", asus_info->revision);
560 len += sprintf(page + len, "DSDT revision : %s\n", buf);
561 snprintf(buf, 7, "%s", asus_info->oem_id);
562 len += sprintf(page + len, "OEM id : %s\n", buf);
563 snprintf(buf, 9, "%s", asus_info->oem_table_id);
564 len += sprintf(page + len, "OEM table id : %s\n", buf);
565 snprintf(buf, 16, "%x", asus_info->oem_revision);
566 len += sprintf(page + len, "OEM revision : 0x%s\n", buf);
567 snprintf(buf, 5, "%s", asus_info->asl_compiler_id);
568 len += sprintf(page + len, "ASL comp vendor id : %s\n", buf);
569 snprintf(buf, 16, "%x", asus_info->asl_compiler_revision);
570 len += sprintf(page + len, "ASL comp revision : 0x%s\n", buf);
571 }
572
573 return len;
574 }
575
576 /*
577 * /proc handlers
578 * We write our info in page, we begin at offset off and cannot write more
579 * than count bytes. We set eof to 1 if we handle those 2 values. We return the
580 * number of bytes written in page
581 */
582
583 /* Generic LED functions */
584 static int read_led(const char *ledname, int ledmask)
585 {
586 if (ledname) {
587 int led_status;
588
589 if (read_acpi_int(NULL, ledname, &led_status))
590 return led_status;
591 else
592 printk(KERN_WARNING "Asus ACPI: Error reading LED "
593 "status\n");
594 }
595 return (hotk->status & ledmask) ? 1 : 0;
596 }
597
598 static int parse_arg(const char __user *buf, unsigned long count, int *val)
599 {
600 char s[32];
601 if (!count)
602 return 0;
603 if (count > 31)
604 return -EINVAL;
605 if (copy_from_user(s, buf, count))
606 return -EFAULT;
607 s[count] = 0;
608 if (sscanf(s, "%i", val) != 1)
609 return -EINVAL;
610 return count;
611 }
612
613 /* FIXME: kill extraneous args so it can be called independently */
614 static int
615 write_led(const char __user *buffer, unsigned long count,
616 char *ledname, int ledmask, int invert)
617 {
618 int rv, value;
619 int led_out = 0;
620
621 rv = parse_arg(buffer, count, &value);
622 if (rv > 0)
623 led_out = value ? 1 : 0;
624
625 hotk->status =
626 (led_out) ? (hotk->status | ledmask) : (hotk->status & ~ledmask);
627
628 if (invert) /* invert target value */
629 led_out = !led_out;
630
631 if (!write_acpi_int(hotk->handle, ledname, led_out, NULL))
632 printk(KERN_WARNING "Asus ACPI: LED (%s) write failed\n",
633 ledname);
634
635 return rv;
636 }
637
638 /*
639 * Proc handlers for MLED
640 */
641 static int
642 proc_read_mled(char *page, char **start, off_t off, int count, int *eof,
643 void *data)
644 {
645 return sprintf(page, "%d\n",
646 read_led(hotk->methods->mled_status, MLED_ON));
647 }
648
649 static int
650 proc_write_mled(struct file *file, const char __user *buffer,
651 unsigned long count, void *data)
652 {
653 return write_led(buffer, count, hotk->methods->mt_mled, MLED_ON, 1);
654 }
655
656 /*
657 * Proc handlers for LED display
658 */
659 static int
660 proc_read_ledd(char *page, char **start, off_t off, int count, int *eof,
661 void *data)
662 {
663 return sprintf(page, "0x%08x\n", hotk->ledd_status);
664 }
665
666 static int
667 proc_write_ledd(struct file *file, const char __user *buffer,
668 unsigned long count, void *data)
669 {
670 int rv, value;
671
672 rv = parse_arg(buffer, count, &value);
673 if (rv > 0) {
674 if (!write_acpi_int
675 (hotk->handle, hotk->methods->mt_ledd, value, NULL))
676 printk(KERN_WARNING
677 "Asus ACPI: LED display write failed\n");
678 else
679 hotk->ledd_status = (u32) value;
680 }
681 return rv;
682 }
683
684 /*
685 * Proc handlers for WLED
686 */
687 static int
688 proc_read_wled(char *page, char **start, off_t off, int count, int *eof,
689 void *data)
690 {
691 return sprintf(page, "%d\n",
692 read_led(hotk->methods->wled_status, WLED_ON));
693 }
694
695 static int
696 proc_write_wled(struct file *file, const char __user *buffer,
697 unsigned long count, void *data)
698 {
699 return write_led(buffer, count, hotk->methods->mt_wled, WLED_ON, 0);
700 }
701
702 /*
703 * Proc handlers for Bluetooth
704 */
705 static int
706 proc_read_bluetooth(char *page, char **start, off_t off, int count, int *eof,
707 void *data)
708 {
709 return sprintf(page, "%d\n", read_led(hotk->methods->bt_status, BT_ON));
710 }
711
712 static int
713 proc_write_bluetooth(struct file *file, const char __user *buffer,
714 unsigned long count, void *data)
715 {
716 /* Note: mt_bt_switch controls both internal Bluetooth adapter's
717 presence and its LED */
718 return write_led(buffer, count, hotk->methods->mt_bt_switch, BT_ON, 0);
719 }
720
721 /*
722 * Proc handlers for TLED
723 */
724 static int
725 proc_read_tled(char *page, char **start, off_t off, int count, int *eof,
726 void *data)
727 {
728 return sprintf(page, "%d\n",
729 read_led(hotk->methods->tled_status, TLED_ON));
730 }
731
732 static int
733 proc_write_tled(struct file *file, const char __user *buffer,
734 unsigned long count, void *data)
735 {
736 return write_led(buffer, count, hotk->methods->mt_tled, TLED_ON, 0);
737 }
738
739 static int get_lcd_state(void)
740 {
741 int lcd = 0;
742
743 if (hotk->model == L3H) {
744 /* L3H and the like have to be handled differently */
745 acpi_status status = 0;
746 struct acpi_object_list input;
747 union acpi_object mt_params[2];
748 struct acpi_buffer output;
749 union acpi_object out_obj;
750
751 input.count = 2;
752 input.pointer = mt_params;
753 /* Note: the following values are partly guessed up, but
754 otherwise they seem to work */
755 mt_params[0].type = ACPI_TYPE_INTEGER;
756 mt_params[0].integer.value = 0x02;
757 mt_params[1].type = ACPI_TYPE_INTEGER;
758 mt_params[1].integer.value = 0x02;
759
760 output.length = sizeof(out_obj);
761 output.pointer = &out_obj;
762
763 status =
764 acpi_evaluate_object(NULL, hotk->methods->lcd_status,
765 &input, &output);
766 if (status != AE_OK)
767 return -1;
768 if (out_obj.type == ACPI_TYPE_INTEGER)
769 /* That's what the AML code does */
770 lcd = out_obj.integer.value >> 8;
771 } else if (hotk->model == F3Sa) {
772 unsigned long long tmp;
773 union acpi_object param;
774 struct acpi_object_list input;
775 acpi_status status;
776
777 /* Read pin 11 */
778 param.type = ACPI_TYPE_INTEGER;
779 param.integer.value = 0x11;
780 input.count = 1;
781 input.pointer = &param;
782
783 status = acpi_evaluate_integer(NULL, hotk->methods->lcd_status,
784 &input, &tmp);
785 if (status != AE_OK)
786 return -1;
787
788 lcd = tmp;
789 } else {
790 /* We don't have to check anything if we are here */
791 if (!read_acpi_int(NULL, hotk->methods->lcd_status, &lcd))
792 printk(KERN_WARNING
793 "Asus ACPI: Error reading LCD status\n");
794
795 if (hotk->model == L2D)
796 lcd = ~lcd;
797 }
798
799 return (lcd & 1);
800 }
801
802 static int set_lcd_state(int value)
803 {
804 int lcd = 0;
805 acpi_status status = 0;
806
807 lcd = value ? 1 : 0;
808 if (lcd != get_lcd_state()) {
809 /* switch */
810 if (hotk->model != L3H) {
811 status =
812 acpi_evaluate_object(NULL,
813 hotk->methods->mt_lcd_switch,
814 NULL, NULL);
815 } else {
816 /* L3H and the like must be handled differently */
817 if (!write_acpi_int
818 (hotk->handle, hotk->methods->mt_lcd_switch, 0x07,
819 NULL))
820 status = AE_ERROR;
821 /* L3H's AML executes EHK (0x07) upon Fn+F7 keypress,
822 the exact behaviour is simulated here */
823 }
824 if (ACPI_FAILURE(status))
825 printk(KERN_WARNING "Asus ACPI: Error switching LCD\n");
826 }
827 return 0;
828
829 }
830
831 static int
832 proc_read_lcd(char *page, char **start, off_t off, int count, int *eof,
833 void *data)
834 {
835 return sprintf(page, "%d\n", get_lcd_state());
836 }
837
838 static int
839 proc_write_lcd(struct file *file, const char __user *buffer,
840 unsigned long count, void *data)
841 {
842 int rv, value;
843
844 rv = parse_arg(buffer, count, &value);
845 if (rv > 0)
846 set_lcd_state(value);
847 return rv;
848 }
849
850 static int read_brightness(struct backlight_device *bd)
851 {
852 int value;
853
854 if (hotk->methods->brightness_get) { /* SPLV/GPLV laptop */
855 if (!read_acpi_int(hotk->handle, hotk->methods->brightness_get,
856 &value))
857 printk(KERN_WARNING
858 "Asus ACPI: Error reading brightness\n");
859 } else if (hotk->methods->brightness_status) { /* For D1 for example */
860 if (!read_acpi_int(NULL, hotk->methods->brightness_status,
861 &value))
862 printk(KERN_WARNING
863 "Asus ACPI: Error reading brightness\n");
864 } else /* No GPLV method */
865 value = hotk->brightness;
866 return value;
867 }
868
869 /*
870 * Change the brightness level
871 */
872 static int set_brightness(int value)
873 {
874 acpi_status status = 0;
875 int ret = 0;
876
877 /* SPLV laptop */
878 if (hotk->methods->brightness_set) {
879 if (!write_acpi_int(hotk->handle, hotk->methods->brightness_set,
880 value, NULL))
881 printk(KERN_WARNING
882 "Asus ACPI: Error changing brightness\n");
883 ret = -EIO;
884 goto out;
885 }
886
887 /* No SPLV method if we are here, act as appropriate */
888 value -= read_brightness(NULL);
889 while (value != 0) {
890 status = acpi_evaluate_object(NULL, (value > 0) ?
891 hotk->methods->brightness_up :
892 hotk->methods->brightness_down,
893 NULL, NULL);
894 (value > 0) ? value-- : value++;
895 if (ACPI_FAILURE(status))
896 printk(KERN_WARNING
897 "Asus ACPI: Error changing brightness\n");
898 ret = -EIO;
899 }
900 out:
901 return ret;
902 }
903
904 static int set_brightness_status(struct backlight_device *bd)
905 {
906 return set_brightness(bd->props.brightness);
907 }
908
909 static int
910 proc_read_brn(char *page, char **start, off_t off, int count, int *eof,
911 void *data)
912 {
913 return sprintf(page, "%d\n", read_brightness(NULL));
914 }
915
916 static int
917 proc_write_brn(struct file *file, const char __user *buffer,
918 unsigned long count, void *data)
919 {
920 int rv, value;
921
922 rv = parse_arg(buffer, count, &value);
923 if (rv > 0) {
924 value = (0 < value) ? ((15 < value) ? 15 : value) : 0;
925 /* 0 <= value <= 15 */
926 set_brightness(value);
927 }
928 return rv;
929 }
930
931 static void set_display(int value)
932 {
933 /* no sanity check needed for now */
934 if (!write_acpi_int(hotk->handle, hotk->methods->display_set,
935 value, NULL))
936 printk(KERN_WARNING "Asus ACPI: Error setting display\n");
937 return;
938 }
939
940 /*
941 * Now, *this* one could be more user-friendly, but so far, no-one has
942 * complained. The significance of bits is the same as in proc_write_disp()
943 */
944 static int
945 proc_read_disp(char *page, char **start, off_t off, int count, int *eof,
946 void *data)
947 {
948 int value = 0;
949
950 if (!read_acpi_int(hotk->handle, hotk->methods->display_get, &value))
951 printk(KERN_WARNING
952 "Asus ACPI: Error reading display status\n");
953 value &= 0x07; /* needed for some models, shouldn't hurt others */
954 return sprintf(page, "%d\n", value);
955 }
956
957 /*
958 * Experimental support for display switching. As of now: 1 should activate
959 * the LCD output, 2 should do for CRT, and 4 for TV-Out. Any combination
960 * (bitwise) of these will suffice. I never actually tested 3 displays hooked
961 * up simultaneously, so be warned. See the acpi4asus README for more info.
962 */
963 static int
964 proc_write_disp(struct file *file, const char __user *buffer,
965 unsigned long count, void *data)
966 {
967 int rv, value;
968
969 rv = parse_arg(buffer, count, &value);
970 if (rv > 0)
971 set_display(value);
972 return rv;
973 }
974
975 typedef int (proc_readfunc) (char *page, char **start, off_t off, int count,
976 int *eof, void *data);
977 typedef int (proc_writefunc) (struct file *file, const char __user *buffer,
978 unsigned long count, void *data);
979
980 static int
981 asus_proc_add(char *name, proc_writefunc *writefunc,
982 proc_readfunc *readfunc, mode_t mode,
983 struct acpi_device *device)
984 {
985 struct proc_dir_entry *proc =
986 create_proc_entry(name, mode, acpi_device_dir(device));
987 if (!proc) {
988 printk(KERN_WARNING " Unable to create %s fs entry\n", name);
989 return -1;
990 }
991 proc->write_proc = writefunc;
992 proc->read_proc = readfunc;
993 proc->data = acpi_driver_data(device);
994 proc->uid = asus_uid;
995 proc->gid = asus_gid;
996 return 0;
997 }
998
999 static int asus_hotk_add_fs(struct acpi_device *device)
1000 {
1001 struct proc_dir_entry *proc;
1002 mode_t mode;
1003
1004 /*
1005 * If parameter uid or gid is not changed, keep the default setting for
1006 * our proc entries (-rw-rw-rw-) else, it means we care about security,
1007 * and then set to -rw-rw----
1008 */
1009
1010 if ((asus_uid == 0) && (asus_gid == 0)) {
1011 mode = S_IFREG | S_IRUGO | S_IWUGO;
1012 } else {
1013 mode = S_IFREG | S_IRUSR | S_IRGRP | S_IWUSR | S_IWGRP;
1014 printk(KERN_WARNING " asus_uid and asus_gid parameters are "
1015 "deprecated, use chown and chmod instead!\n");
1016 }
1017
1018 acpi_device_dir(device) = asus_proc_dir;
1019 if (!acpi_device_dir(device))
1020 return -ENODEV;
1021
1022 proc = create_proc_entry(PROC_INFO, mode, acpi_device_dir(device));
1023 if (proc) {
1024 proc->read_proc = proc_read_info;
1025 proc->data = acpi_driver_data(device);
1026 proc->uid = asus_uid;
1027 proc->gid = asus_gid;
1028 } else {
1029 printk(KERN_WARNING " Unable to create " PROC_INFO
1030 " fs entry\n");
1031 }
1032
1033 if (hotk->methods->mt_wled) {
1034 asus_proc_add(PROC_WLED, &proc_write_wled, &proc_read_wled,
1035 mode, device);
1036 }
1037
1038 if (hotk->methods->mt_ledd) {
1039 asus_proc_add(PROC_LEDD, &proc_write_ledd, &proc_read_ledd,
1040 mode, device);
1041 }
1042
1043 if (hotk->methods->mt_mled) {
1044 asus_proc_add(PROC_MLED, &proc_write_mled, &proc_read_mled,
1045 mode, device);
1046 }
1047
1048 if (hotk->methods->mt_tled) {
1049 asus_proc_add(PROC_TLED, &proc_write_tled, &proc_read_tled,
1050 mode, device);
1051 }
1052
1053 if (hotk->methods->mt_bt_switch) {
1054 asus_proc_add(PROC_BT, &proc_write_bluetooth,
1055 &proc_read_bluetooth, mode, device);
1056 }
1057
1058 /*
1059 * We need both read node and write method as LCD switch is also
1060 * accessible from the keyboard
1061 */
1062 if (hotk->methods->mt_lcd_switch && hotk->methods->lcd_status) {
1063 asus_proc_add(PROC_LCD, &proc_write_lcd, &proc_read_lcd, mode,
1064 device);
1065 }
1066
1067 if ((hotk->methods->brightness_up && hotk->methods->brightness_down) ||
1068 (hotk->methods->brightness_get && hotk->methods->brightness_set)) {
1069 asus_proc_add(PROC_BRN, &proc_write_brn, &proc_read_brn, mode,
1070 device);
1071 }
1072
1073 if (hotk->methods->display_set) {
1074 asus_proc_add(PROC_DISP, &proc_write_disp, &proc_read_disp,
1075 mode, device);
1076 }
1077
1078 return 0;
1079 }
1080
1081 static int asus_hotk_remove_fs(struct acpi_device *device)
1082 {
1083 if (acpi_device_dir(device)) {
1084 remove_proc_entry(PROC_INFO, acpi_device_dir(device));
1085 if (hotk->methods->mt_wled)
1086 remove_proc_entry(PROC_WLED, acpi_device_dir(device));
1087 if (hotk->methods->mt_mled)
1088 remove_proc_entry(PROC_MLED, acpi_device_dir(device));
1089 if (hotk->methods->mt_tled)
1090 remove_proc_entry(PROC_TLED, acpi_device_dir(device));
1091 if (hotk->methods->mt_ledd)
1092 remove_proc_entry(PROC_LEDD, acpi_device_dir(device));
1093 if (hotk->methods->mt_bt_switch)
1094 remove_proc_entry(PROC_BT, acpi_device_dir(device));
1095 if (hotk->methods->mt_lcd_switch && hotk->methods->lcd_status)
1096 remove_proc_entry(PROC_LCD, acpi_device_dir(device));
1097 if ((hotk->methods->brightness_up
1098 && hotk->methods->brightness_down)
1099 || (hotk->methods->brightness_get
1100 && hotk->methods->brightness_set))
1101 remove_proc_entry(PROC_BRN, acpi_device_dir(device));
1102 if (hotk->methods->display_set)
1103 remove_proc_entry(PROC_DISP, acpi_device_dir(device));
1104 }
1105 return 0;
1106 }
1107
1108 static void asus_hotk_notify(struct acpi_device *device, u32 event)
1109 {
1110 /* TODO Find a better way to handle events count. */
1111 if (!hotk)
1112 return;
1113
1114 /*
1115 * The BIOS *should* be sending us device events, but apparently
1116 * Asus uses system events instead, so just ignore any device
1117 * events we get.
1118 */
1119 if (event > ACPI_MAX_SYS_NOTIFY)
1120 return;
1121
1122 if ((event & ~((u32) BR_UP)) < 16)
1123 hotk->brightness = (event & ~((u32) BR_UP));
1124 else if ((event & ~((u32) BR_DOWN)) < 16)
1125 hotk->brightness = (event & ~((u32) BR_DOWN));
1126
1127 acpi_bus_generate_proc_event(hotk->device, event,
1128 hotk->event_count[event % 128]++);
1129
1130 return;
1131 }
1132
1133 /*
1134 * Match the model string to the list of supported models. Return END_MODEL if
1135 * no match or model is NULL.
1136 */
1137 static int asus_model_match(char *model)
1138 {
1139 if (model == NULL)
1140 return END_MODEL;
1141
1142 if (strncmp(model, "L3D", 3) == 0)
1143 return L3D;
1144 else if (strncmp(model, "L2E", 3) == 0 ||
1145 strncmp(model, "L3H", 3) == 0 || strncmp(model, "L5D", 3) == 0)
1146 return L3H;
1147 else if (strncmp(model, "L3", 2) == 0 || strncmp(model, "L2B", 3) == 0)
1148 return L3C;
1149 else if (strncmp(model, "L8L", 3) == 0)
1150 return L8L;
1151 else if (strncmp(model, "L4R", 3) == 0)
1152 return L4R;
1153 else if (strncmp(model, "M6N", 3) == 0 || strncmp(model, "W3N", 3) == 0)
1154 return M6N;
1155 else if (strncmp(model, "M6R", 3) == 0 || strncmp(model, "A3G", 3) == 0)
1156 return M6R;
1157 else if (strncmp(model, "M2N", 3) == 0 ||
1158 strncmp(model, "M3N", 3) == 0 ||
1159 strncmp(model, "M5N", 3) == 0 ||
1160 strncmp(model, "M6N", 3) == 0 ||
1161 strncmp(model, "S1N", 3) == 0 ||
1162 strncmp(model, "S5N", 3) == 0 || strncmp(model, "W1N", 3) == 0)
1163 return xxN;
1164 else if (strncmp(model, "M1", 2) == 0)
1165 return M1A;
1166 else if (strncmp(model, "M2", 2) == 0 || strncmp(model, "L4E", 3) == 0)
1167 return M2E;
1168 else if (strncmp(model, "L2", 2) == 0)
1169 return L2D;
1170 else if (strncmp(model, "L8", 2) == 0)
1171 return S1x;
1172 else if (strncmp(model, "D1", 2) == 0)
1173 return D1x;
1174 else if (strncmp(model, "A1", 2) == 0)
1175 return A1x;
1176 else if (strncmp(model, "A2", 2) == 0)
1177 return A2x;
1178 else if (strncmp(model, "J1", 2) == 0)
1179 return S2x;
1180 else if (strncmp(model, "L5", 2) == 0)
1181 return L5x;
1182 else if (strncmp(model, "A4G", 3) == 0)
1183 return A4G;
1184 else if (strncmp(model, "W1N", 3) == 0)
1185 return W1N;
1186 else if (strncmp(model, "W3V", 3) == 0)
1187 return W3V;
1188 else if (strncmp(model, "W5A", 3) == 0)
1189 return W5A;
1190 else if (strncmp(model, "R1F", 3) == 0)
1191 return R1F;
1192 else if (strncmp(model, "A4S", 3) == 0)
1193 return A4S;
1194 else if (strncmp(model, "F3Sa", 4) == 0)
1195 return F3Sa;
1196 else
1197 return END_MODEL;
1198 }
1199
1200 /*
1201 * This function is used to initialize the hotk with right values. In this
1202 * method, we can make all the detection we want, and modify the hotk struct
1203 */
1204 static int asus_hotk_get_info(void)
1205 {
1206 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
1207 union acpi_object *model = NULL;
1208 int bsts_result;
1209 char *string = NULL;
1210 acpi_status status;
1211
1212 /*
1213 * Get DSDT headers early enough to allow for differentiating between
1214 * models, but late enough to allow acpi_bus_register_driver() to fail
1215 * before doing anything ACPI-specific. Should we encounter a machine,
1216 * which needs special handling (i.e. its hotkey device has a different
1217 * HID), this bit will be moved. A global variable asus_info contains
1218 * the DSDT header.
1219 */
1220 status = acpi_get_table(ACPI_SIG_DSDT, 1, &asus_info);
1221 if (ACPI_FAILURE(status))
1222 printk(KERN_WARNING " Couldn't get the DSDT table header\n");
1223
1224 /* We have to write 0 on init this far for all ASUS models */
1225 if (!write_acpi_int(hotk->handle, "INIT", 0, &buffer)) {
1226 printk(KERN_ERR " Hotkey initialization failed\n");
1227 return -ENODEV;
1228 }
1229
1230 /* This needs to be called for some laptops to init properly */
1231 if (!read_acpi_int(hotk->handle, "BSTS", &bsts_result))
1232 printk(KERN_WARNING " Error calling BSTS\n");
1233 else if (bsts_result)
1234 printk(KERN_NOTICE " BSTS called, 0x%02x returned\n",
1235 bsts_result);
1236
1237 /*
1238 * Try to match the object returned by INIT to the specific model.
1239 * Handle every possible object (or the lack of thereof) the DSDT
1240 * writers might throw at us. When in trouble, we pass NULL to
1241 * asus_model_match() and try something completely different.
1242 */
1243 if (buffer.pointer) {
1244 model = buffer.pointer;
1245 switch (model->type) {
1246 case ACPI_TYPE_STRING:
1247 string = model->string.pointer;
1248 break;
1249 case ACPI_TYPE_BUFFER:
1250 string = model->buffer.pointer;
1251 break;
1252 default:
1253 kfree(model);
1254 model = NULL;
1255 break;
1256 }
1257 }
1258 hotk->model = asus_model_match(string);
1259 if (hotk->model == END_MODEL) { /* match failed */
1260 if (asus_info &&
1261 strncmp(asus_info->oem_table_id, "ODEM", 4) == 0) {
1262 hotk->model = P30;
1263 printk(KERN_NOTICE
1264 " Samsung P30 detected, supported\n");
1265 } else {
1266 hotk->model = M2E;
1267 printk(KERN_NOTICE " unsupported model %s, trying "
1268 "default values\n", string);
1269 printk(KERN_NOTICE
1270 " send /proc/acpi/dsdt to the developers\n");
1271 kfree(model);
1272 return -ENODEV;
1273 }
1274 hotk->methods = &model_conf[hotk->model];
1275 return AE_OK;
1276 }
1277 hotk->methods = &model_conf[hotk->model];
1278 printk(KERN_NOTICE " %s model detected, supported\n", string);
1279
1280 /* Sort of per-model blacklist */
1281 if (strncmp(string, "L2B", 3) == 0)
1282 hotk->methods->lcd_status = NULL;
1283 /* L2B is similar enough to L3C to use its settings, with this only
1284 exception */
1285 else if (strncmp(string, "A3G", 3) == 0)
1286 hotk->methods->lcd_status = "\\BLFG";
1287 /* A3G is like M6R */
1288 else if (strncmp(string, "S5N", 3) == 0 ||
1289 strncmp(string, "M5N", 3) == 0 ||
1290 strncmp(string, "W3N", 3) == 0)
1291 hotk->methods->mt_mled = NULL;
1292 /* S5N, M5N and W3N have no MLED */
1293 else if (strncmp(string, "L5D", 3) == 0)
1294 hotk->methods->mt_wled = NULL;
1295 /* L5D's WLED is not controlled by ACPI */
1296 else if (strncmp(string, "M2N", 3) == 0 ||
1297 strncmp(string, "W3V", 3) == 0 ||
1298 strncmp(string, "S1N", 3) == 0)
1299 hotk->methods->mt_wled = "WLED";
1300 /* M2N, S1N and W3V have a usable WLED */
1301 else if (asus_info) {
1302 if (strncmp(asus_info->oem_table_id, "L1", 2) == 0)
1303 hotk->methods->mled_status = NULL;
1304 /* S1300A reports L84F, but L1400B too, account for that */
1305 }
1306
1307 kfree(model);
1308
1309 return AE_OK;
1310 }
1311
1312 static int asus_hotk_check(void)
1313 {
1314 int result = 0;
1315
1316 result = acpi_bus_get_status(hotk->device);
1317 if (result)
1318 return result;
1319
1320 if (hotk->device->status.present) {
1321 result = asus_hotk_get_info();
1322 } else {
1323 printk(KERN_ERR " Hotkey device not present, aborting\n");
1324 return -EINVAL;
1325 }
1326
1327 return result;
1328 }
1329
1330 static int asus_hotk_found;
1331
1332 static int asus_hotk_add(struct acpi_device *device)
1333 {
1334 acpi_status status = AE_OK;
1335 int result;
1336
1337 if (!device)
1338 return -EINVAL;
1339
1340 printk(KERN_NOTICE "Asus Laptop ACPI Extras version %s\n",
1341 ASUS_ACPI_VERSION);
1342
1343 hotk = kzalloc(sizeof(struct asus_hotk), GFP_KERNEL);
1344 if (!hotk)
1345 return -ENOMEM;
1346
1347 hotk->handle = device->handle;
1348 strcpy(acpi_device_name(device), ACPI_HOTK_DEVICE_NAME);
1349 strcpy(acpi_device_class(device), ACPI_HOTK_CLASS);
1350 device->driver_data = hotk;
1351 hotk->device = device;
1352
1353 result = asus_hotk_check();
1354 if (result)
1355 goto end;
1356
1357 result = asus_hotk_add_fs(device);
1358 if (result)
1359 goto end;
1360
1361 /* For laptops without GPLV: init the hotk->brightness value */
1362 if ((!hotk->methods->brightness_get)
1363 && (!hotk->methods->brightness_status)
1364 && (hotk->methods->brightness_up && hotk->methods->brightness_down)) {
1365 status =
1366 acpi_evaluate_object(NULL, hotk->methods->brightness_down,
1367 NULL, NULL);
1368 if (ACPI_FAILURE(status))
1369 printk(KERN_WARNING " Error changing brightness\n");
1370 else {
1371 status =
1372 acpi_evaluate_object(NULL,
1373 hotk->methods->brightness_up,
1374 NULL, NULL);
1375 if (ACPI_FAILURE(status))
1376 printk(KERN_WARNING " Strange, error changing"
1377 " brightness\n");
1378 }
1379 }
1380
1381 asus_hotk_found = 1;
1382
1383 /* LED display is off by default */
1384 hotk->ledd_status = 0xFFF;
1385
1386 end:
1387 if (result)
1388 kfree(hotk);
1389
1390 return result;
1391 }
1392
1393 static int asus_hotk_remove(struct acpi_device *device, int type)
1394 {
1395 if (!device || !acpi_driver_data(device))
1396 return -EINVAL;
1397
1398 asus_hotk_remove_fs(device);
1399
1400 kfree(hotk);
1401
1402 return 0;
1403 }
1404
1405 static struct backlight_ops asus_backlight_data = {
1406 .get_brightness = read_brightness,
1407 .update_status = set_brightness_status,
1408 };
1409
1410 static void asus_acpi_exit(void)
1411 {
1412 if (asus_backlight_device)
1413 backlight_device_unregister(asus_backlight_device);
1414
1415 acpi_bus_unregister_driver(&asus_hotk_driver);
1416 remove_proc_entry(PROC_ASUS, acpi_root_dir);
1417
1418 return;
1419 }
1420
1421 static int __init asus_acpi_init(void)
1422 {
1423 int result;
1424
1425 if (acpi_disabled)
1426 return -ENODEV;
1427
1428 asus_proc_dir = proc_mkdir(PROC_ASUS, acpi_root_dir);
1429 if (!asus_proc_dir) {
1430 printk(KERN_ERR "Asus ACPI: Unable to create /proc entry\n");
1431 return -ENODEV;
1432 }
1433
1434 result = acpi_bus_register_driver(&asus_hotk_driver);
1435 if (result < 0) {
1436 remove_proc_entry(PROC_ASUS, acpi_root_dir);
1437 return result;
1438 }
1439
1440 /*
1441 * This is a bit of a kludge. We only want this module loaded
1442 * for ASUS systems, but there's currently no way to probe the
1443 * ACPI namespace for ASUS HIDs. So we just return failure if
1444 * we didn't find one, which will cause the module to be
1445 * unloaded.
1446 */
1447 if (!asus_hotk_found) {
1448 acpi_bus_unregister_driver(&asus_hotk_driver);
1449 remove_proc_entry(PROC_ASUS, acpi_root_dir);
1450 return -ENODEV;
1451 }
1452
1453 asus_backlight_device = backlight_device_register("asus", NULL, NULL,
1454 &asus_backlight_data);
1455 if (IS_ERR(asus_backlight_device)) {
1456 printk(KERN_ERR "Could not register asus backlight device\n");
1457 asus_backlight_device = NULL;
1458 asus_acpi_exit();
1459 return -ENODEV;
1460 }
1461 asus_backlight_device->props.max_brightness = 15;
1462
1463 return 0;
1464 }
1465
1466 module_init(asus_acpi_init);
1467 module_exit(asus_acpi_exit);
kernel-based virtual machine