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platform: x86: asus_acpi: world-writable procfs files
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / platform / x86 / 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 * �ic Burghard - LED display support for W1N
30 *
31 */
32
33 #include <linux/kernel.h>
34 #include <linux/module.h>
35 #include <linux/slab.h>
36 #include <linux/init.h>
37 #include <linux/types.h>
38 #include <linux/proc_fs.h>
39 #include <linux/seq_file.h>
40 #include <linux/backlight.h>
41 #include <acpi/acpi_drivers.h>
42 #include <acpi/acpi_bus.h>
43 #include <asm/uaccess.h>
44
45 #define ASUS_ACPI_VERSION "0.30"
46
47 #define PROC_ASUS "asus" /* The directory */
48 #define PROC_MLED "mled"
49 #define PROC_WLED "wled"
50 #define PROC_TLED "tled"
51 #define PROC_BT "bluetooth"
52 #define PROC_LEDD "ledd"
53 #define PROC_INFO "info"
54 #define PROC_LCD "lcd"
55 #define PROC_BRN "brn"
56 #define PROC_DISP "disp"
57
58 #define ACPI_HOTK_NAME "Asus Laptop ACPI Extras Driver"
59 #define ACPI_HOTK_CLASS "hotkey"
60 #define ACPI_HOTK_DEVICE_NAME "Hotkey"
61
62 /*
63 * Some events we use, same for all Asus
64 */
65 #define BR_UP 0x10
66 #define BR_DOWN 0x20
67
68 /*
69 * Flags for hotk status
70 */
71 #define MLED_ON 0x01 /* Mail LED */
72 #define WLED_ON 0x02 /* Wireless LED */
73 #define TLED_ON 0x04 /* Touchpad LED */
74 #define BT_ON 0x08 /* Internal Bluetooth */
75
76 MODULE_AUTHOR("Julien Lerouge, Karol Kozimor");
77 MODULE_DESCRIPTION(ACPI_HOTK_NAME);
78 MODULE_LICENSE("GPL");
79
80 static uid_t asus_uid;
81 static gid_t asus_gid;
82 module_param(asus_uid, uint, 0);
83 MODULE_PARM_DESC(asus_uid, "UID for entries in /proc/acpi/asus");
84 module_param(asus_gid, uint, 0);
85 MODULE_PARM_DESC(asus_gid, "GID for entries in /proc/acpi/asus");
86
87 /* For each model, all features implemented,
88 * those marked with R are relative to HOTK, A for absolute */
89 struct model_data {
90 char *name; /* name of the laptop________________A */
91 char *mt_mled; /* method to handle mled_____________R */
92 char *mled_status; /* node to handle mled reading_______A */
93 char *mt_wled; /* method to handle wled_____________R */
94 char *wled_status; /* node to handle wled reading_______A */
95 char *mt_tled; /* method to handle tled_____________R */
96 char *tled_status; /* node to handle tled reading_______A */
97 char *mt_ledd; /* method to handle LED display______R */
98 char *mt_bt_switch; /* method to switch Bluetooth on/off_R */
99 char *bt_status; /* no model currently supports this__? */
100 char *mt_lcd_switch; /* method to turn LCD on/off_________A */
101 char *lcd_status; /* node to read LCD panel state______A */
102 char *brightness_up; /* method to set brightness up_______A */
103 char *brightness_down; /* method to set brightness down ____A */
104 char *brightness_set; /* method to set absolute brightness_R */
105 char *brightness_get; /* method to get absolute brightness_R */
106 char *brightness_status;/* node to get brightness____________A */
107 char *display_set; /* method to set video output________R */
108 char *display_get; /* method to get video output________R */
109 };
110
111 /*
112 * This is the main structure, we can use it to store anything interesting
113 * about the hotk device
114 */
115 struct asus_hotk {
116 struct acpi_device *device; /* the device we are in */
117 acpi_handle handle; /* the handle of the hotk device */
118 char status; /* status of the hotk, for LEDs */
119 u32 ledd_status; /* status of the LED display */
120 struct model_data *methods; /* methods available on the laptop */
121 u8 brightness; /* brightness level */
122 enum {
123 A1x = 0, /* A1340D, A1300F */
124 A2x, /* A2500H */
125 A4G, /* A4700G */
126 D1x, /* D1 */
127 L2D, /* L2000D */
128 L3C, /* L3800C */
129 L3D, /* L3400D */
130 L3H, /* L3H, L2000E, L5D */
131 L4R, /* L4500R */
132 L5x, /* L5800C */
133 L8L, /* L8400L */
134 M1A, /* M1300A */
135 M2E, /* M2400E, L4400L */
136 M6N, /* M6800N, W3400N */
137 M6R, /* M6700R, A3000G */
138 P30, /* Samsung P30 */
139 S1x, /* S1300A, but also L1400B and M2400A (L84F) */
140 S2x, /* S200 (J1 reported), Victor MP-XP7210 */
141 W1N, /* W1000N */
142 W5A, /* W5A */
143 W3V, /* W3030V */
144 xxN, /* M2400N, M3700N, M5200N, M6800N,
145 S1300N, S5200N*/
146 A4S, /* Z81sp */
147 F3Sa, /* (Centrino) */
148 R1F,
149 END_MODEL
150 } model; /* Models currently supported */
151 u16 event_count[128]; /* Count for each event TODO make this better */
152 };
153
154 /* Here we go */
155 #define A1x_PREFIX "\\_SB.PCI0.ISA.EC0."
156 #define L3C_PREFIX "\\_SB.PCI0.PX40.ECD0."
157 #define M1A_PREFIX "\\_SB.PCI0.PX40.EC0."
158 #define P30_PREFIX "\\_SB.PCI0.LPCB.EC0."
159 #define S1x_PREFIX "\\_SB.PCI0.PX40."
160 #define S2x_PREFIX A1x_PREFIX
161 #define xxN_PREFIX "\\_SB.PCI0.SBRG.EC0."
162
163 static struct model_data model_conf[END_MODEL] = {
164 /*
165 * TODO I have seen a SWBX and AIBX method on some models, like L1400B,
166 * it seems to be a kind of switch, but what for ?
167 */
168
169 {
170 .name = "A1x",
171 .mt_mled = "MLED",
172 .mled_status = "\\MAIL",
173 .mt_lcd_switch = A1x_PREFIX "_Q10",
174 .lcd_status = "\\BKLI",
175 .brightness_up = A1x_PREFIX "_Q0E",
176 .brightness_down = A1x_PREFIX "_Q0F"},
177
178 {
179 .name = "A2x",
180 .mt_mled = "MLED",
181 .mt_wled = "WLED",
182 .wled_status = "\\SG66",
183 .mt_lcd_switch = "\\Q10",
184 .lcd_status = "\\BAOF",
185 .brightness_set = "SPLV",
186 .brightness_get = "GPLV",
187 .display_set = "SDSP",
188 .display_get = "\\INFB"},
189
190 {
191 .name = "A4G",
192 .mt_mled = "MLED",
193 /* WLED present, but not controlled by ACPI */
194 .mt_lcd_switch = xxN_PREFIX "_Q10",
195 .brightness_set = "SPLV",
196 .brightness_get = "GPLV",
197 .display_set = "SDSP",
198 .display_get = "\\ADVG"},
199
200 {
201 .name = "D1x",
202 .mt_mled = "MLED",
203 .mt_lcd_switch = "\\Q0D",
204 .lcd_status = "\\GP11",
205 .brightness_up = "\\Q0C",
206 .brightness_down = "\\Q0B",
207 .brightness_status = "\\BLVL",
208 .display_set = "SDSP",
209 .display_get = "\\INFB"},
210
211 {
212 .name = "L2D",
213 .mt_mled = "MLED",
214 .mled_status = "\\SGP6",
215 .mt_wled = "WLED",
216 .wled_status = "\\RCP3",
217 .mt_lcd_switch = "\\Q10",
218 .lcd_status = "\\SGP0",
219 .brightness_up = "\\Q0E",
220 .brightness_down = "\\Q0F",
221 .display_set = "SDSP",
222 .display_get = "\\INFB"},
223
224 {
225 .name = "L3C",
226 .mt_mled = "MLED",
227 .mt_wled = "WLED",
228 .mt_lcd_switch = L3C_PREFIX "_Q10",
229 .lcd_status = "\\GL32",
230 .brightness_set = "SPLV",
231 .brightness_get = "GPLV",
232 .display_set = "SDSP",
233 .display_get = "\\_SB.PCI0.PCI1.VGAC.NMAP"},
234
235 {
236 .name = "L3D",
237 .mt_mled = "MLED",
238 .mled_status = "\\MALD",
239 .mt_wled = "WLED",
240 .mt_lcd_switch = "\\Q10",
241 .lcd_status = "\\BKLG",
242 .brightness_set = "SPLV",
243 .brightness_get = "GPLV",
244 .display_set = "SDSP",
245 .display_get = "\\INFB"},
246
247 {
248 .name = "L3H",
249 .mt_mled = "MLED",
250 .mt_wled = "WLED",
251 .mt_lcd_switch = "EHK",
252 .lcd_status = "\\_SB.PCI0.PM.PBC",
253 .brightness_set = "SPLV",
254 .brightness_get = "GPLV",
255 .display_set = "SDSP",
256 .display_get = "\\INFB"},
257
258 {
259 .name = "L4R",
260 .mt_mled = "MLED",
261 .mt_wled = "WLED",
262 .wled_status = "\\_SB.PCI0.SBRG.SG13",
263 .mt_lcd_switch = xxN_PREFIX "_Q10",
264 .lcd_status = "\\_SB.PCI0.SBSM.SEO4",
265 .brightness_set = "SPLV",
266 .brightness_get = "GPLV",
267 .display_set = "SDSP",
268 .display_get = "\\_SB.PCI0.P0P1.VGA.GETD"},
269
270 {
271 .name = "L5x",
272 .mt_mled = "MLED",
273 /* WLED present, but not controlled by ACPI */
274 .mt_tled = "TLED",
275 .mt_lcd_switch = "\\Q0D",
276 .lcd_status = "\\BAOF",
277 .brightness_set = "SPLV",
278 .brightness_get = "GPLV",
279 .display_set = "SDSP",
280 .display_get = "\\INFB"},
281
282 {
283 .name = "L8L"
284 /* No features, but at least support the hotkeys */
285 },
286
287 {
288 .name = "M1A",
289 .mt_mled = "MLED",
290 .mt_lcd_switch = M1A_PREFIX "Q10",
291 .lcd_status = "\\PNOF",
292 .brightness_up = M1A_PREFIX "Q0E",
293 .brightness_down = M1A_PREFIX "Q0F",
294 .brightness_status = "\\BRIT",
295 .display_set = "SDSP",
296 .display_get = "\\INFB"},
297
298 {
299 .name = "M2E",
300 .mt_mled = "MLED",
301 .mt_wled = "WLED",
302 .mt_lcd_switch = "\\Q10",
303 .lcd_status = "\\GP06",
304 .brightness_set = "SPLV",
305 .brightness_get = "GPLV",
306 .display_set = "SDSP",
307 .display_get = "\\INFB"},
308
309 {
310 .name = "M6N",
311 .mt_mled = "MLED",
312 .mt_wled = "WLED",
313 .wled_status = "\\_SB.PCI0.SBRG.SG13",
314 .mt_lcd_switch = xxN_PREFIX "_Q10",
315 .lcd_status = "\\_SB.BKLT",
316 .brightness_set = "SPLV",
317 .brightness_get = "GPLV",
318 .display_set = "SDSP",
319 .display_get = "\\SSTE"},
320
321 {
322 .name = "M6R",
323 .mt_mled = "MLED",
324 .mt_wled = "WLED",
325 .mt_lcd_switch = xxN_PREFIX "_Q10",
326 .lcd_status = "\\_SB.PCI0.SBSM.SEO4",
327 .brightness_set = "SPLV",
328 .brightness_get = "GPLV",
329 .display_set = "SDSP",
330 .display_get = "\\_SB.PCI0.P0P1.VGA.GETD"},
331
332 {
333 .name = "P30",
334 .mt_wled = "WLED",
335 .mt_lcd_switch = P30_PREFIX "_Q0E",
336 .lcd_status = "\\BKLT",
337 .brightness_up = P30_PREFIX "_Q68",
338 .brightness_down = P30_PREFIX "_Q69",
339 .brightness_get = "GPLV",
340 .display_set = "SDSP",
341 .display_get = "\\DNXT"},
342
343 {
344 .name = "S1x",
345 .mt_mled = "MLED",
346 .mled_status = "\\EMLE",
347 .mt_wled = "WLED",
348 .mt_lcd_switch = S1x_PREFIX "Q10",
349 .lcd_status = "\\PNOF",
350 .brightness_set = "SPLV",
351 .brightness_get = "GPLV"},
352
353 {
354 .name = "S2x",
355 .mt_mled = "MLED",
356 .mled_status = "\\MAIL",
357 .mt_lcd_switch = S2x_PREFIX "_Q10",
358 .lcd_status = "\\BKLI",
359 .brightness_up = S2x_PREFIX "_Q0B",
360 .brightness_down = S2x_PREFIX "_Q0A"},
361
362 {
363 .name = "W1N",
364 .mt_mled = "MLED",
365 .mt_wled = "WLED",
366 .mt_ledd = "SLCM",
367 .mt_lcd_switch = xxN_PREFIX "_Q10",
368 .lcd_status = "\\BKLT",
369 .brightness_set = "SPLV",
370 .brightness_get = "GPLV",
371 .display_set = "SDSP",
372 .display_get = "\\ADVG"},
373
374 {
375 .name = "W5A",
376 .mt_bt_switch = "BLED",
377 .mt_wled = "WLED",
378 .mt_lcd_switch = xxN_PREFIX "_Q10",
379 .brightness_set = "SPLV",
380 .brightness_get = "GPLV",
381 .display_set = "SDSP",
382 .display_get = "\\ADVG"},
383
384 {
385 .name = "W3V",
386 .mt_mled = "MLED",
387 .mt_wled = "WLED",
388 .mt_lcd_switch = xxN_PREFIX "_Q10",
389 .lcd_status = "\\BKLT",
390 .brightness_set = "SPLV",
391 .brightness_get = "GPLV",
392 .display_set = "SDSP",
393 .display_get = "\\INFB"},
394
395 {
396 .name = "xxN",
397 .mt_mled = "MLED",
398 /* WLED present, but not controlled by ACPI */
399 .mt_lcd_switch = xxN_PREFIX "_Q10",
400 .lcd_status = "\\BKLT",
401 .brightness_set = "SPLV",
402 .brightness_get = "GPLV",
403 .display_set = "SDSP",
404 .display_get = "\\ADVG"},
405
406 {
407 .name = "A4S",
408 .brightness_set = "SPLV",
409 .brightness_get = "GPLV",
410 .mt_bt_switch = "BLED",
411 .mt_wled = "WLED"
412 },
413
414 {
415 .name = "F3Sa",
416 .mt_bt_switch = "BLED",
417 .mt_wled = "WLED",
418 .mt_mled = "MLED",
419 .brightness_get = "GPLV",
420 .brightness_set = "SPLV",
421 .mt_lcd_switch = "\\_SB.PCI0.SBRG.EC0._Q10",
422 .lcd_status = "\\_SB.PCI0.SBRG.EC0.RPIN",
423 .display_get = "\\ADVG",
424 .display_set = "SDSP",
425 },
426 {
427 .name = "R1F",
428 .mt_bt_switch = "BLED",
429 .mt_mled = "MLED",
430 .mt_wled = "WLED",
431 .mt_lcd_switch = "\\Q10",
432 .lcd_status = "\\GP06",
433 .brightness_set = "SPLV",
434 .brightness_get = "GPLV",
435 .display_set = "SDSP",
436 .display_get = "\\INFB"
437 }
438 };
439
440 /* procdir we use */
441 static struct proc_dir_entry *asus_proc_dir;
442
443 static struct backlight_device *asus_backlight_device;
444
445 /*
446 * This header is made available to allow proper configuration given model,
447 * revision number , ... this info cannot go in struct asus_hotk because it is
448 * available before the hotk
449 */
450 static struct acpi_table_header *asus_info;
451
452 /* The actual device the driver binds to */
453 static struct asus_hotk *hotk;
454
455 /*
456 * The hotkey driver and autoloading declaration
457 */
458 static int asus_hotk_add(struct acpi_device *device);
459 static int asus_hotk_remove(struct acpi_device *device, int type);
460 static void asus_hotk_notify(struct acpi_device *device, u32 event);
461
462 static const struct acpi_device_id asus_device_ids[] = {
463 {"ATK0100", 0},
464 {"", 0},
465 };
466 MODULE_DEVICE_TABLE(acpi, asus_device_ids);
467
468 static struct acpi_driver asus_hotk_driver = {
469 .name = "asus_acpi",
470 .class = ACPI_HOTK_CLASS,
471 .owner = THIS_MODULE,
472 .ids = asus_device_ids,
473 .flags = ACPI_DRIVER_ALL_NOTIFY_EVENTS,
474 .ops = {
475 .add = asus_hotk_add,
476 .remove = asus_hotk_remove,
477 .notify = asus_hotk_notify,
478 },
479 };
480
481 /*
482 * This function evaluates an ACPI method, given an int as parameter, the
483 * method is searched within the scope of the handle, can be NULL. The output
484 * of the method is written is output, which can also be NULL
485 *
486 * returns 1 if write is successful, 0 else.
487 */
488 static int write_acpi_int(acpi_handle handle, const char *method, int val,
489 struct acpi_buffer *output)
490 {
491 struct acpi_object_list params; /* list of input parameters (int) */
492 union acpi_object in_obj; /* the only param we use */
493 acpi_status status;
494
495 params.count = 1;
496 params.pointer = &in_obj;
497 in_obj.type = ACPI_TYPE_INTEGER;
498 in_obj.integer.value = val;
499
500 status = acpi_evaluate_object(handle, (char *)method, &params, output);
501 return (status == AE_OK);
502 }
503
504 static int read_acpi_int(acpi_handle handle, const char *method, int *val)
505 {
506 struct acpi_buffer output;
507 union acpi_object out_obj;
508 acpi_status status;
509
510 output.length = sizeof(out_obj);
511 output.pointer = &out_obj;
512
513 status = acpi_evaluate_object(handle, (char *)method, NULL, &output);
514 *val = out_obj.integer.value;
515 return (status == AE_OK) && (out_obj.type == ACPI_TYPE_INTEGER);
516 }
517
518 static int asus_info_proc_show(struct seq_file *m, void *v)
519 {
520 int temp;
521
522 seq_printf(m, ACPI_HOTK_NAME " " ASUS_ACPI_VERSION "\n");
523 seq_printf(m, "Model reference : %s\n", hotk->methods->name);
524 /*
525 * The SFUN method probably allows the original driver to get the list
526 * of features supported by a given model. For now, 0x0100 or 0x0800
527 * bit signifies that the laptop is equipped with a Wi-Fi MiniPCI card.
528 * The significance of others is yet to be found.
529 */
530 if (read_acpi_int(hotk->handle, "SFUN", &temp))
531 seq_printf(m, "SFUN value : 0x%04x\n", temp);
532 /*
533 * Another value for userspace: the ASYM method returns 0x02 for
534 * battery low and 0x04 for battery critical, its readings tend to be
535 * more accurate than those provided by _BST.
536 * Note: since not all the laptops provide this method, errors are
537 * silently ignored.
538 */
539 if (read_acpi_int(hotk->handle, "ASYM", &temp))
540 seq_printf(m, "ASYM value : 0x%04x\n", temp);
541 if (asus_info) {
542 seq_printf(m, "DSDT length : %d\n", asus_info->length);
543 seq_printf(m, "DSDT checksum : %d\n", asus_info->checksum);
544 seq_printf(m, "DSDT revision : %d\n", asus_info->revision);
545 seq_printf(m, "OEM id : %.*s\n", ACPI_OEM_ID_SIZE, asus_info->oem_id);
546 seq_printf(m, "OEM table id : %.*s\n", ACPI_OEM_TABLE_ID_SIZE, asus_info->oem_table_id);
547 seq_printf(m, "OEM revision : 0x%x\n", asus_info->oem_revision);
548 seq_printf(m, "ASL comp vendor id : %.*s\n", ACPI_NAME_SIZE, asus_info->asl_compiler_id);
549 seq_printf(m, "ASL comp revision : 0x%x\n", asus_info->asl_compiler_revision);
550 }
551
552 return 0;
553 }
554
555 static int asus_info_proc_open(struct inode *inode, struct file *file)
556 {
557 return single_open(file, asus_info_proc_show, NULL);
558 }
559
560 static const struct file_operations asus_info_proc_fops = {
561 .owner = THIS_MODULE,
562 .open = asus_info_proc_open,
563 .read = seq_read,
564 .llseek = seq_lseek,
565 .release = single_release,
566 };
567
568 /*
569 * /proc handlers
570 * We write our info in page, we begin at offset off and cannot write more
571 * than count bytes. We set eof to 1 if we handle those 2 values. We return the
572 * number of bytes written in page
573 */
574
575 /* Generic LED functions */
576 static int read_led(const char *ledname, int ledmask)
577 {
578 if (ledname) {
579 int led_status;
580
581 if (read_acpi_int(NULL, ledname, &led_status))
582 return led_status;
583 else
584 printk(KERN_WARNING "Asus ACPI: Error reading LED "
585 "status\n");
586 }
587 return (hotk->status & ledmask) ? 1 : 0;
588 }
589
590 static int parse_arg(const char __user *buf, unsigned long count, int *val)
591 {
592 char s[32];
593 if (!count)
594 return 0;
595 if (count > 31)
596 return -EINVAL;
597 if (copy_from_user(s, buf, count))
598 return -EFAULT;
599 s[count] = 0;
600 if (sscanf(s, "%i", val) != 1)
601 return -EINVAL;
602 return count;
603 }
604
605 /* FIXME: kill extraneous args so it can be called independently */
606 static int
607 write_led(const char __user *buffer, unsigned long count,
608 char *ledname, int ledmask, int invert)
609 {
610 int rv, value;
611 int led_out = 0;
612
613 rv = parse_arg(buffer, count, &value);
614 if (rv > 0)
615 led_out = value ? 1 : 0;
616
617 hotk->status =
618 (led_out) ? (hotk->status | ledmask) : (hotk->status & ~ledmask);
619
620 if (invert) /* invert target value */
621 led_out = !led_out;
622
623 if (!write_acpi_int(hotk->handle, ledname, led_out, NULL))
624 printk(KERN_WARNING "Asus ACPI: LED (%s) write failed\n",
625 ledname);
626
627 return rv;
628 }
629
630 /*
631 * Proc handlers for MLED
632 */
633 static int mled_proc_show(struct seq_file *m, void *v)
634 {
635 seq_printf(m, "%d\n", read_led(hotk->methods->mled_status, MLED_ON));
636 return 0;
637 }
638
639 static int mled_proc_open(struct inode *inode, struct file *file)
640 {
641 return single_open(file, mled_proc_show, NULL);
642 }
643
644 static ssize_t mled_proc_write(struct file *file, const char __user *buffer,
645 size_t count, loff_t *pos)
646 {
647 return write_led(buffer, count, hotk->methods->mt_mled, MLED_ON, 1);
648 }
649
650 static const struct file_operations mled_proc_fops = {
651 .owner = THIS_MODULE,
652 .open = mled_proc_open,
653 .read = seq_read,
654 .llseek = seq_lseek,
655 .release = single_release,
656 .write = mled_proc_write,
657 };
658
659 /*
660 * Proc handlers for LED display
661 */
662 static int ledd_proc_show(struct seq_file *m, void *v)
663 {
664 seq_printf(m, "0x%08x\n", hotk->ledd_status);
665 return 0;
666 }
667
668 static int ledd_proc_open(struct inode *inode, struct file *file)
669 {
670 return single_open(file, ledd_proc_show, NULL);
671 }
672
673 static ssize_t ledd_proc_write(struct file *file, const char __user *buffer,
674 size_t count, loff_t *pos)
675 {
676 int rv, value;
677
678 rv = parse_arg(buffer, count, &value);
679 if (rv > 0) {
680 if (!write_acpi_int
681 (hotk->handle, hotk->methods->mt_ledd, value, NULL))
682 printk(KERN_WARNING
683 "Asus ACPI: LED display write failed\n");
684 else
685 hotk->ledd_status = (u32) value;
686 }
687 return rv;
688 }
689
690 static const struct file_operations ledd_proc_fops = {
691 .owner = THIS_MODULE,
692 .open = ledd_proc_open,
693 .read = seq_read,
694 .llseek = seq_lseek,
695 .release = single_release,
696 .write = ledd_proc_write,
697 };
698
699 /*
700 * Proc handlers for WLED
701 */
702 static int wled_proc_show(struct seq_file *m, void *v)
703 {
704 seq_printf(m, "%d\n", read_led(hotk->methods->wled_status, WLED_ON));
705 return 0;
706 }
707
708 static int wled_proc_open(struct inode *inode, struct file *file)
709 {
710 return single_open(file, wled_proc_show, NULL);
711 }
712
713 static ssize_t wled_proc_write(struct file *file, const char __user *buffer,
714 size_t count, loff_t *pos)
715 {
716 return write_led(buffer, count, hotk->methods->mt_wled, WLED_ON, 0);
717 }
718
719 static const struct file_operations wled_proc_fops = {
720 .owner = THIS_MODULE,
721 .open = wled_proc_open,
722 .read = seq_read,
723 .llseek = seq_lseek,
724 .release = single_release,
725 .write = wled_proc_write,
726 };
727
728 /*
729 * Proc handlers for Bluetooth
730 */
731 static int bluetooth_proc_show(struct seq_file *m, void *v)
732 {
733 seq_printf(m, "%d\n", read_led(hotk->methods->bt_status, BT_ON));
734 return 0;
735 }
736
737 static int bluetooth_proc_open(struct inode *inode, struct file *file)
738 {
739 return single_open(file, bluetooth_proc_show, NULL);
740 }
741
742 static ssize_t bluetooth_proc_write(struct file *file,
743 const char __user *buffer, size_t count, loff_t *pos)
744 {
745 /* Note: mt_bt_switch controls both internal Bluetooth adapter's
746 presence and its LED */
747 return write_led(buffer, count, hotk->methods->mt_bt_switch, BT_ON, 0);
748 }
749
750 static const struct file_operations bluetooth_proc_fops = {
751 .owner = THIS_MODULE,
752 .open = bluetooth_proc_open,
753 .read = seq_read,
754 .llseek = seq_lseek,
755 .release = single_release,
756 .write = bluetooth_proc_write,
757 };
758
759 /*
760 * Proc handlers for TLED
761 */
762 static int tled_proc_show(struct seq_file *m, void *v)
763 {
764 seq_printf(m, "%d\n", read_led(hotk->methods->tled_status, TLED_ON));
765 return 0;
766 }
767
768 static int tled_proc_open(struct inode *inode, struct file *file)
769 {
770 return single_open(file, tled_proc_show, NULL);
771 }
772
773 static ssize_t tled_proc_write(struct file *file, const char __user *buffer,
774 size_t count, loff_t *pos)
775 {
776 return write_led(buffer, count, hotk->methods->mt_tled, TLED_ON, 0);
777 }
778
779 static const struct file_operations tled_proc_fops = {
780 .owner = THIS_MODULE,
781 .open = tled_proc_open,
782 .read = seq_read,
783 .llseek = seq_lseek,
784 .release = single_release,
785 .write = tled_proc_write,
786 };
787
788 static int get_lcd_state(void)
789 {
790 int lcd = 0;
791
792 if (hotk->model == L3H) {
793 /* L3H and the like have to be handled differently */
794 acpi_status status = 0;
795 struct acpi_object_list input;
796 union acpi_object mt_params[2];
797 struct acpi_buffer output;
798 union acpi_object out_obj;
799
800 input.count = 2;
801 input.pointer = mt_params;
802 /* Note: the following values are partly guessed up, but
803 otherwise they seem to work */
804 mt_params[0].type = ACPI_TYPE_INTEGER;
805 mt_params[0].integer.value = 0x02;
806 mt_params[1].type = ACPI_TYPE_INTEGER;
807 mt_params[1].integer.value = 0x02;
808
809 output.length = sizeof(out_obj);
810 output.pointer = &out_obj;
811
812 status =
813 acpi_evaluate_object(NULL, hotk->methods->lcd_status,
814 &input, &output);
815 if (status != AE_OK)
816 return -1;
817 if (out_obj.type == ACPI_TYPE_INTEGER)
818 /* That's what the AML code does */
819 lcd = out_obj.integer.value >> 8;
820 } else if (hotk->model == F3Sa) {
821 unsigned long long tmp;
822 union acpi_object param;
823 struct acpi_object_list input;
824 acpi_status status;
825
826 /* Read pin 11 */
827 param.type = ACPI_TYPE_INTEGER;
828 param.integer.value = 0x11;
829 input.count = 1;
830 input.pointer = &param;
831
832 status = acpi_evaluate_integer(NULL, hotk->methods->lcd_status,
833 &input, &tmp);
834 if (status != AE_OK)
835 return -1;
836
837 lcd = tmp;
838 } else {
839 /* We don't have to check anything if we are here */
840 if (!read_acpi_int(NULL, hotk->methods->lcd_status, &lcd))
841 printk(KERN_WARNING
842 "Asus ACPI: Error reading LCD status\n");
843
844 if (hotk->model == L2D)
845 lcd = ~lcd;
846 }
847
848 return (lcd & 1);
849 }
850
851 static int set_lcd_state(int value)
852 {
853 int lcd = 0;
854 acpi_status status = 0;
855
856 lcd = value ? 1 : 0;
857 if (lcd != get_lcd_state()) {
858 /* switch */
859 if (hotk->model != L3H) {
860 status =
861 acpi_evaluate_object(NULL,
862 hotk->methods->mt_lcd_switch,
863 NULL, NULL);
864 } else {
865 /* L3H and the like must be handled differently */
866 if (!write_acpi_int
867 (hotk->handle, hotk->methods->mt_lcd_switch, 0x07,
868 NULL))
869 status = AE_ERROR;
870 /* L3H's AML executes EHK (0x07) upon Fn+F7 keypress,
871 the exact behaviour is simulated here */
872 }
873 if (ACPI_FAILURE(status))
874 printk(KERN_WARNING "Asus ACPI: Error switching LCD\n");
875 }
876 return 0;
877
878 }
879
880 static int lcd_proc_show(struct seq_file *m, void *v)
881 {
882 seq_printf(m, "%d\n", get_lcd_state());
883 return 0;
884 }
885
886 static int lcd_proc_open(struct inode *inode, struct file *file)
887 {
888 return single_open(file, lcd_proc_show, NULL);
889 }
890
891 static ssize_t lcd_proc_write(struct file *file, const char __user *buffer,
892 size_t count, loff_t *pos)
893 {
894 int rv, value;
895
896 rv = parse_arg(buffer, count, &value);
897 if (rv > 0)
898 set_lcd_state(value);
899 return rv;
900 }
901
902 static const struct file_operations lcd_proc_fops = {
903 .owner = THIS_MODULE,
904 .open = lcd_proc_open,
905 .read = seq_read,
906 .llseek = seq_lseek,
907 .release = single_release,
908 .write = lcd_proc_write,
909 };
910
911 static int read_brightness(struct backlight_device *bd)
912 {
913 int value;
914
915 if (hotk->methods->brightness_get) { /* SPLV/GPLV laptop */
916 if (!read_acpi_int(hotk->handle, hotk->methods->brightness_get,
917 &value))
918 printk(KERN_WARNING
919 "Asus ACPI: Error reading brightness\n");
920 } else if (hotk->methods->brightness_status) { /* For D1 for example */
921 if (!read_acpi_int(NULL, hotk->methods->brightness_status,
922 &value))
923 printk(KERN_WARNING
924 "Asus ACPI: Error reading brightness\n");
925 } else /* No GPLV method */
926 value = hotk->brightness;
927 return value;
928 }
929
930 /*
931 * Change the brightness level
932 */
933 static int set_brightness(int value)
934 {
935 acpi_status status = 0;
936 int ret = 0;
937
938 /* SPLV laptop */
939 if (hotk->methods->brightness_set) {
940 if (!write_acpi_int(hotk->handle, hotk->methods->brightness_set,
941 value, NULL)) {
942 printk(KERN_WARNING
943 "Asus ACPI: Error changing brightness\n");
944 ret = -EIO;
945 }
946 goto out;
947 }
948
949 /* No SPLV method if we are here, act as appropriate */
950 value -= read_brightness(NULL);
951 while (value != 0) {
952 status = acpi_evaluate_object(NULL, (value > 0) ?
953 hotk->methods->brightness_up :
954 hotk->methods->brightness_down,
955 NULL, NULL);
956 (value > 0) ? value-- : value++;
957 if (ACPI_FAILURE(status)) {
958 printk(KERN_WARNING
959 "Asus ACPI: Error changing brightness\n");
960 ret = -EIO;
961 }
962 }
963 out:
964 return ret;
965 }
966
967 static int set_brightness_status(struct backlight_device *bd)
968 {
969 return set_brightness(bd->props.brightness);
970 }
971
972 static int brn_proc_show(struct seq_file *m, void *v)
973 {
974 seq_printf(m, "%d\n", read_brightness(NULL));
975 return 0;
976 }
977
978 static int brn_proc_open(struct inode *inode, struct file *file)
979 {
980 return single_open(file, brn_proc_show, NULL);
981 }
982
983 static ssize_t brn_proc_write(struct file *file, const char __user *buffer,
984 size_t count, loff_t *pos)
985 {
986 int rv, value;
987
988 rv = parse_arg(buffer, count, &value);
989 if (rv > 0) {
990 value = (0 < value) ? ((15 < value) ? 15 : value) : 0;
991 /* 0 <= value <= 15 */
992 set_brightness(value);
993 }
994 return rv;
995 }
996
997 static const struct file_operations brn_proc_fops = {
998 .owner = THIS_MODULE,
999 .open = brn_proc_open,
1000 .read = seq_read,
1001 .llseek = seq_lseek,
1002 .release = single_release,
1003 .write = brn_proc_write,
1004 };
1005
1006 static void set_display(int value)
1007 {
1008 /* no sanity check needed for now */
1009 if (!write_acpi_int(hotk->handle, hotk->methods->display_set,
1010 value, NULL))
1011 printk(KERN_WARNING "Asus ACPI: Error setting display\n");
1012 return;
1013 }
1014
1015 /*
1016 * Now, *this* one could be more user-friendly, but so far, no-one has
1017 * complained. The significance of bits is the same as in proc_write_disp()
1018 */
1019 static int disp_proc_show(struct seq_file *m, void *v)
1020 {
1021 int value = 0;
1022
1023 if (!read_acpi_int(hotk->handle, hotk->methods->display_get, &value))
1024 printk(KERN_WARNING
1025 "Asus ACPI: Error reading display status\n");
1026 value &= 0x07; /* needed for some models, shouldn't hurt others */
1027 seq_printf(m, "%d\n", value);
1028 return 0;
1029 }
1030
1031 static int disp_proc_open(struct inode *inode, struct file *file)
1032 {
1033 return single_open(file, disp_proc_show, NULL);
1034 }
1035
1036 /*
1037 * Experimental support for display switching. As of now: 1 should activate
1038 * the LCD output, 2 should do for CRT, and 4 for TV-Out. Any combination
1039 * (bitwise) of these will suffice. I never actually tested 3 displays hooked
1040 * up simultaneously, so be warned. See the acpi4asus README for more info.
1041 */
1042 static ssize_t disp_proc_write(struct file *file, const char __user *buffer,
1043 size_t count, loff_t *pos)
1044 {
1045 int rv, value;
1046
1047 rv = parse_arg(buffer, count, &value);
1048 if (rv > 0)
1049 set_display(value);
1050 return rv;
1051 }
1052
1053 static const struct file_operations disp_proc_fops = {
1054 .owner = THIS_MODULE,
1055 .open = disp_proc_open,
1056 .read = seq_read,
1057 .llseek = seq_lseek,
1058 .release = single_release,
1059 .write = disp_proc_write,
1060 };
1061
1062 static int
1063 asus_proc_add(char *name, const struct file_operations *proc_fops, mode_t mode,
1064 struct acpi_device *device)
1065 {
1066 struct proc_dir_entry *proc;
1067
1068 proc = proc_create_data(name, mode, acpi_device_dir(device),
1069 proc_fops, acpi_driver_data(device));
1070 if (!proc) {
1071 printk(KERN_WARNING " Unable to create %s fs entry\n", name);
1072 return -1;
1073 }
1074 proc->uid = asus_uid;
1075 proc->gid = asus_gid;
1076 return 0;
1077 }
1078
1079 static int asus_hotk_add_fs(struct acpi_device *device)
1080 {
1081 struct proc_dir_entry *proc;
1082 mode_t mode;
1083
1084 if ((asus_uid == 0) && (asus_gid == 0)) {
1085 mode = S_IFREG | S_IRUGO | S_IWUSR | S_IWGRP;
1086 } else {
1087 mode = S_IFREG | S_IRUSR | S_IRGRP | S_IWUSR | S_IWGRP;
1088 printk(KERN_WARNING " asus_uid and asus_gid parameters are "
1089 "deprecated, use chown and chmod instead!\n");
1090 }
1091
1092 acpi_device_dir(device) = asus_proc_dir;
1093 if (!acpi_device_dir(device))
1094 return -ENODEV;
1095
1096 proc = proc_create(PROC_INFO, mode, acpi_device_dir(device),
1097 &asus_info_proc_fops);
1098 if (proc) {
1099 proc->uid = asus_uid;
1100 proc->gid = asus_gid;
1101 } else {
1102 printk(KERN_WARNING " Unable to create " PROC_INFO
1103 " fs entry\n");
1104 }
1105
1106 if (hotk->methods->mt_wled) {
1107 asus_proc_add(PROC_WLED, &wled_proc_fops, mode, device);
1108 }
1109
1110 if (hotk->methods->mt_ledd) {
1111 asus_proc_add(PROC_LEDD, &ledd_proc_fops, mode, device);
1112 }
1113
1114 if (hotk->methods->mt_mled) {
1115 asus_proc_add(PROC_MLED, &mled_proc_fops, mode, device);
1116 }
1117
1118 if (hotk->methods->mt_tled) {
1119 asus_proc_add(PROC_TLED, &tled_proc_fops, mode, device);
1120 }
1121
1122 if (hotk->methods->mt_bt_switch) {
1123 asus_proc_add(PROC_BT, &bluetooth_proc_fops, mode, device);
1124 }
1125
1126 /*
1127 * We need both read node and write method as LCD switch is also
1128 * accessible from the keyboard
1129 */
1130 if (hotk->methods->mt_lcd_switch && hotk->methods->lcd_status) {
1131 asus_proc_add(PROC_LCD, &lcd_proc_fops, mode, device);
1132 }
1133
1134 if ((hotk->methods->brightness_up && hotk->methods->brightness_down) ||
1135 (hotk->methods->brightness_get && hotk->methods->brightness_set)) {
1136 asus_proc_add(PROC_BRN, &brn_proc_fops, mode, device);
1137 }
1138
1139 if (hotk->methods->display_set) {
1140 asus_proc_add(PROC_DISP, &disp_proc_fops, mode, device);
1141 }
1142
1143 return 0;
1144 }
1145
1146 static int asus_hotk_remove_fs(struct acpi_device *device)
1147 {
1148 if (acpi_device_dir(device)) {
1149 remove_proc_entry(PROC_INFO, acpi_device_dir(device));
1150 if (hotk->methods->mt_wled)
1151 remove_proc_entry(PROC_WLED, acpi_device_dir(device));
1152 if (hotk->methods->mt_mled)
1153 remove_proc_entry(PROC_MLED, acpi_device_dir(device));
1154 if (hotk->methods->mt_tled)
1155 remove_proc_entry(PROC_TLED, acpi_device_dir(device));
1156 if (hotk->methods->mt_ledd)
1157 remove_proc_entry(PROC_LEDD, acpi_device_dir(device));
1158 if (hotk->methods->mt_bt_switch)
1159 remove_proc_entry(PROC_BT, acpi_device_dir(device));
1160 if (hotk->methods->mt_lcd_switch && hotk->methods->lcd_status)
1161 remove_proc_entry(PROC_LCD, acpi_device_dir(device));
1162 if ((hotk->methods->brightness_up
1163 && hotk->methods->brightness_down)
1164 || (hotk->methods->brightness_get
1165 && hotk->methods->brightness_set))
1166 remove_proc_entry(PROC_BRN, acpi_device_dir(device));
1167 if (hotk->methods->display_set)
1168 remove_proc_entry(PROC_DISP, acpi_device_dir(device));
1169 }
1170 return 0;
1171 }
1172
1173 static void asus_hotk_notify(struct acpi_device *device, u32 event)
1174 {
1175 /* TODO Find a better way to handle events count. */
1176 if (!hotk)
1177 return;
1178
1179 /*
1180 * The BIOS *should* be sending us device events, but apparently
1181 * Asus uses system events instead, so just ignore any device
1182 * events we get.
1183 */
1184 if (event > ACPI_MAX_SYS_NOTIFY)
1185 return;
1186
1187 if ((event & ~((u32) BR_UP)) < 16)
1188 hotk->brightness = (event & ~((u32) BR_UP));
1189 else if ((event & ~((u32) BR_DOWN)) < 16)
1190 hotk->brightness = (event & ~((u32) BR_DOWN));
1191
1192 acpi_bus_generate_proc_event(hotk->device, event,
1193 hotk->event_count[event % 128]++);
1194
1195 return;
1196 }
1197
1198 /*
1199 * Match the model string to the list of supported models. Return END_MODEL if
1200 * no match or model is NULL.
1201 */
1202 static int asus_model_match(char *model)
1203 {
1204 if (model == NULL)
1205 return END_MODEL;
1206
1207 if (strncmp(model, "L3D", 3) == 0)
1208 return L3D;
1209 else if (strncmp(model, "L2E", 3) == 0 ||
1210 strncmp(model, "L3H", 3) == 0 || strncmp(model, "L5D", 3) == 0)
1211 return L3H;
1212 else if (strncmp(model, "L3", 2) == 0 || strncmp(model, "L2B", 3) == 0)
1213 return L3C;
1214 else if (strncmp(model, "L8L", 3) == 0)
1215 return L8L;
1216 else if (strncmp(model, "L4R", 3) == 0)
1217 return L4R;
1218 else if (strncmp(model, "M6N", 3) == 0 || strncmp(model, "W3N", 3) == 0)
1219 return M6N;
1220 else if (strncmp(model, "M6R", 3) == 0 || strncmp(model, "A3G", 3) == 0)
1221 return M6R;
1222 else if (strncmp(model, "M2N", 3) == 0 ||
1223 strncmp(model, "M3N", 3) == 0 ||
1224 strncmp(model, "M5N", 3) == 0 ||
1225 strncmp(model, "S1N", 3) == 0 ||
1226 strncmp(model, "S5N", 3) == 0)
1227 return xxN;
1228 else if (strncmp(model, "M1", 2) == 0)
1229 return M1A;
1230 else if (strncmp(model, "M2", 2) == 0 || strncmp(model, "L4E", 3) == 0)
1231 return M2E;
1232 else if (strncmp(model, "L2", 2) == 0)
1233 return L2D;
1234 else if (strncmp(model, "L8", 2) == 0)
1235 return S1x;
1236 else if (strncmp(model, "D1", 2) == 0)
1237 return D1x;
1238 else if (strncmp(model, "A1", 2) == 0)
1239 return A1x;
1240 else if (strncmp(model, "A2", 2) == 0)
1241 return A2x;
1242 else if (strncmp(model, "J1", 2) == 0)
1243 return S2x;
1244 else if (strncmp(model, "L5", 2) == 0)
1245 return L5x;
1246 else if (strncmp(model, "A4G", 3) == 0)
1247 return A4G;
1248 else if (strncmp(model, "W1N", 3) == 0)
1249 return W1N;
1250 else if (strncmp(model, "W3V", 3) == 0)
1251 return W3V;
1252 else if (strncmp(model, "W5A", 3) == 0)
1253 return W5A;
1254 else if (strncmp(model, "R1F", 3) == 0)
1255 return R1F;
1256 else if (strncmp(model, "A4S", 3) == 0)
1257 return A4S;
1258 else if (strncmp(model, "F3Sa", 4) == 0)
1259 return F3Sa;
1260 else
1261 return END_MODEL;
1262 }
1263
1264 /*
1265 * This function is used to initialize the hotk with right values. In this
1266 * method, we can make all the detection we want, and modify the hotk struct
1267 */
1268 static int asus_hotk_get_info(void)
1269 {
1270 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
1271 union acpi_object *model = NULL;
1272 int bsts_result;
1273 char *string = NULL;
1274 acpi_status status;
1275
1276 /*
1277 * Get DSDT headers early enough to allow for differentiating between
1278 * models, but late enough to allow acpi_bus_register_driver() to fail
1279 * before doing anything ACPI-specific. Should we encounter a machine,
1280 * which needs special handling (i.e. its hotkey device has a different
1281 * HID), this bit will be moved. A global variable asus_info contains
1282 * the DSDT header.
1283 */
1284 status = acpi_get_table(ACPI_SIG_DSDT, 1, &asus_info);
1285 if (ACPI_FAILURE(status))
1286 printk(KERN_WARNING " Couldn't get the DSDT table header\n");
1287
1288 /* We have to write 0 on init this far for all ASUS models */
1289 if (!write_acpi_int(hotk->handle, "INIT", 0, &buffer)) {
1290 printk(KERN_ERR " Hotkey initialization failed\n");
1291 return -ENODEV;
1292 }
1293
1294 /* This needs to be called for some laptops to init properly */
1295 if (!read_acpi_int(hotk->handle, "BSTS", &bsts_result))
1296 printk(KERN_WARNING " Error calling BSTS\n");
1297 else if (bsts_result)
1298 printk(KERN_NOTICE " BSTS called, 0x%02x returned\n",
1299 bsts_result);
1300
1301 /*
1302 * Try to match the object returned by INIT to the specific model.
1303 * Handle every possible object (or the lack of thereof) the DSDT
1304 * writers might throw at us. When in trouble, we pass NULL to
1305 * asus_model_match() and try something completely different.
1306 */
1307 if (buffer.pointer) {
1308 model = buffer.pointer;
1309 switch (model->type) {
1310 case ACPI_TYPE_STRING:
1311 string = model->string.pointer;
1312 break;
1313 case ACPI_TYPE_BUFFER:
1314 string = model->buffer.pointer;
1315 break;
1316 default:
1317 kfree(model);
1318 model = NULL;
1319 break;
1320 }
1321 }
1322 hotk->model = asus_model_match(string);
1323 if (hotk->model == END_MODEL) { /* match failed */
1324 if (asus_info &&
1325 strncmp(asus_info->oem_table_id, "ODEM", 4) == 0) {
1326 hotk->model = P30;
1327 printk(KERN_NOTICE
1328 " Samsung P30 detected, supported\n");
1329 hotk->methods = &model_conf[hotk->model];
1330 kfree(model);
1331 return 0;
1332 } else {
1333 hotk->model = M2E;
1334 printk(KERN_NOTICE " unsupported model %s, trying "
1335 "default values\n", string);
1336 printk(KERN_NOTICE
1337 " send /proc/acpi/dsdt to the developers\n");
1338 kfree(model);
1339 return -ENODEV;
1340 }
1341 }
1342 hotk->methods = &model_conf[hotk->model];
1343 printk(KERN_NOTICE " %s model detected, supported\n", string);
1344
1345 /* Sort of per-model blacklist */
1346 if (strncmp(string, "L2B", 3) == 0)
1347 hotk->methods->lcd_status = NULL;
1348 /* L2B is similar enough to L3C to use its settings, with this only
1349 exception */
1350 else if (strncmp(string, "A3G", 3) == 0)
1351 hotk->methods->lcd_status = "\\BLFG";
1352 /* A3G is like M6R */
1353 else if (strncmp(string, "S5N", 3) == 0 ||
1354 strncmp(string, "M5N", 3) == 0 ||
1355 strncmp(string, "W3N", 3) == 0)
1356 hotk->methods->mt_mled = NULL;
1357 /* S5N, M5N and W3N have no MLED */
1358 else if (strncmp(string, "L5D", 3) == 0)
1359 hotk->methods->mt_wled = NULL;
1360 /* L5D's WLED is not controlled by ACPI */
1361 else if (strncmp(string, "M2N", 3) == 0 ||
1362 strncmp(string, "W3V", 3) == 0 ||
1363 strncmp(string, "S1N", 3) == 0)
1364 hotk->methods->mt_wled = "WLED";
1365 /* M2N, S1N and W3V have a usable WLED */
1366 else if (asus_info) {
1367 if (strncmp(asus_info->oem_table_id, "L1", 2) == 0)
1368 hotk->methods->mled_status = NULL;
1369 /* S1300A reports L84F, but L1400B too, account for that */
1370 }
1371
1372 kfree(model);
1373
1374 return 0;
1375 }
1376
1377 static int asus_hotk_check(void)
1378 {
1379 int result = 0;
1380
1381 result = acpi_bus_get_status(hotk->device);
1382 if (result)
1383 return result;
1384
1385 if (hotk->device->status.present) {
1386 result = asus_hotk_get_info();
1387 } else {
1388 printk(KERN_ERR " Hotkey device not present, aborting\n");
1389 return -EINVAL;
1390 }
1391
1392 return result;
1393 }
1394
1395 static int asus_hotk_found;
1396
1397 static int asus_hotk_add(struct acpi_device *device)
1398 {
1399 acpi_status status = AE_OK;
1400 int result;
1401
1402 printk(KERN_NOTICE "Asus Laptop ACPI Extras version %s\n",
1403 ASUS_ACPI_VERSION);
1404
1405 hotk = kzalloc(sizeof(struct asus_hotk), GFP_KERNEL);
1406 if (!hotk)
1407 return -ENOMEM;
1408
1409 hotk->handle = device->handle;
1410 strcpy(acpi_device_name(device), ACPI_HOTK_DEVICE_NAME);
1411 strcpy(acpi_device_class(device), ACPI_HOTK_CLASS);
1412 device->driver_data = hotk;
1413 hotk->device = device;
1414
1415 result = asus_hotk_check();
1416 if (result)
1417 goto end;
1418
1419 result = asus_hotk_add_fs(device);
1420 if (result)
1421 goto end;
1422
1423 /* For laptops without GPLV: init the hotk->brightness value */
1424 if ((!hotk->methods->brightness_get)
1425 && (!hotk->methods->brightness_status)
1426 && (hotk->methods->brightness_up && hotk->methods->brightness_down)) {
1427 status =
1428 acpi_evaluate_object(NULL, hotk->methods->brightness_down,
1429 NULL, NULL);
1430 if (ACPI_FAILURE(status))
1431 printk(KERN_WARNING " Error changing brightness\n");
1432 else {
1433 status =
1434 acpi_evaluate_object(NULL,
1435 hotk->methods->brightness_up,
1436 NULL, NULL);
1437 if (ACPI_FAILURE(status))
1438 printk(KERN_WARNING " Strange, error changing"
1439 " brightness\n");
1440 }
1441 }
1442
1443 asus_hotk_found = 1;
1444
1445 /* LED display is off by default */
1446 hotk->ledd_status = 0xFFF;
1447
1448 end:
1449 if (result)
1450 kfree(hotk);
1451
1452 return result;
1453 }
1454
1455 static int asus_hotk_remove(struct acpi_device *device, int type)
1456 {
1457 asus_hotk_remove_fs(device);
1458
1459 kfree(hotk);
1460
1461 return 0;
1462 }
1463
1464 static const struct backlight_ops asus_backlight_data = {
1465 .get_brightness = read_brightness,
1466 .update_status = set_brightness_status,
1467 };
1468
1469 static void asus_acpi_exit(void)
1470 {
1471 if (asus_backlight_device)
1472 backlight_device_unregister(asus_backlight_device);
1473
1474 acpi_bus_unregister_driver(&asus_hotk_driver);
1475 remove_proc_entry(PROC_ASUS, acpi_root_dir);
1476
1477 return;
1478 }
1479
1480 static int __init asus_acpi_init(void)
1481 {
1482 struct backlight_properties props;
1483 int result;
1484
1485 result = acpi_bus_register_driver(&asus_hotk_driver);
1486 if (result < 0)
1487 return result;
1488
1489 asus_proc_dir = proc_mkdir(PROC_ASUS, acpi_root_dir);
1490 if (!asus_proc_dir) {
1491 printk(KERN_ERR "Asus ACPI: Unable to create /proc entry\n");
1492 acpi_bus_unregister_driver(&asus_hotk_driver);
1493 return -ENODEV;
1494 }
1495
1496 /*
1497 * This is a bit of a kludge. We only want this module loaded
1498 * for ASUS systems, but there's currently no way to probe the
1499 * ACPI namespace for ASUS HIDs. So we just return failure if
1500 * we didn't find one, which will cause the module to be
1501 * unloaded.
1502 */
1503 if (!asus_hotk_found) {
1504 acpi_bus_unregister_driver(&asus_hotk_driver);
1505 remove_proc_entry(PROC_ASUS, acpi_root_dir);
1506 return -ENODEV;
1507 }
1508
1509 memset(&props, 0, sizeof(struct backlight_properties));
1510 props.max_brightness = 15;
1511 asus_backlight_device = backlight_device_register("asus", NULL, NULL,
1512 &asus_backlight_data,
1513 &props);
1514 if (IS_ERR(asus_backlight_device)) {
1515 printk(KERN_ERR "Could not register asus backlight device\n");
1516 asus_backlight_device = NULL;
1517 asus_acpi_exit();
1518 return -ENODEV;
1519 }
1520
1521 return 0;
1522 }
1523
1524 module_init(asus_acpi_init);
1525 module_exit(asus_acpi_exit);
kernel source for telekom puls (alcatel/mediatek)