projects / GitHub / mt8127 / android_kernel_alcatel_ttab.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
backlight: Allow properties to be passed at registration
[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/init.h>
36 #include <linux/types.h>
37 #include <linux/proc_fs.h>
38 #include <linux/seq_file.h>
39 #include <linux/backlight.h>
40 #include <acpi/acpi_drivers.h>
41 #include <acpi/acpi_bus.h>
42 #include <asm/uaccess.h>
43
44 #define ASUS_ACPI_VERSION "0.30"
45
46 #define PROC_ASUS "asus" /* The directory */
47 #define PROC_MLED "mled"
48 #define PROC_WLED "wled"
49 #define PROC_TLED "tled"
50 #define PROC_BT "bluetooth"
51 #define PROC_LEDD "ledd"
52 #define PROC_INFO "info"
53 #define PROC_LCD "lcd"
54 #define PROC_BRN "brn"
55 #define PROC_DISP "disp"
56
57 #define ACPI_HOTK_NAME "Asus Laptop ACPI Extras Driver"
58 #define ACPI_HOTK_CLASS "hotkey"
59 #define ACPI_HOTK_DEVICE_NAME "Hotkey"
60
61 /*
62 * Some events we use, same for all Asus
63 */
64 #define BR_UP 0x10
65 #define BR_DOWN 0x20
66
67 /*
68 * Flags for hotk status
69 */
70 #define MLED_ON 0x01 /* Mail LED */
71 #define WLED_ON 0x02 /* Wireless LED */
72 #define TLED_ON 0x04 /* Touchpad LED */
73 #define BT_ON 0x08 /* Internal Bluetooth */
74
75 MODULE_AUTHOR("Julien Lerouge, Karol Kozimor");
76 MODULE_DESCRIPTION(ACPI_HOTK_NAME);
77 MODULE_LICENSE("GPL");
78
79 static uid_t asus_uid;
80 static gid_t asus_gid;
81 module_param(asus_uid, uint, 0);
82 MODULE_PARM_DESC(asus_uid, "UID for entries in /proc/acpi/asus");
83 module_param(asus_gid, uint, 0);
84 MODULE_PARM_DESC(asus_gid, "GID for entries in /proc/acpi/asus");
85
86 /* For each model, all features implemented,
87 * those marked with R are relative to HOTK, A for absolute */
88 struct model_data {
89 char *name; /* name of the laptop________________A */
90 char *mt_mled; /* method to handle mled_____________R */
91 char *mled_status; /* node to handle mled reading_______A */
92 char *mt_wled; /* method to handle wled_____________R */
93 char *wled_status; /* node to handle wled reading_______A */
94 char *mt_tled; /* method to handle tled_____________R */
95 char *tled_status; /* node to handle tled reading_______A */
96 char *mt_ledd; /* method to handle LED display______R */
97 char *mt_bt_switch; /* method to switch Bluetooth on/off_R */
98 char *bt_status; /* no model currently supports this__? */
99 char *mt_lcd_switch; /* method to turn LCD on/off_________A */
100 char *lcd_status; /* node to read LCD panel state______A */
101 char *brightness_up; /* method to set brightness up_______A */
102 char *brightness_down; /* method to set brightness down ____A */
103 char *brightness_set; /* method to set absolute brightness_R */
104 char *brightness_get; /* method to get absolute brightness_R */
105 char *brightness_status;/* node to get brightness____________A */
106 char *display_set; /* method to set video output________R */
107 char *display_get; /* method to get video output________R */
108 };
109
110 /*
111 * This is the main structure, we can use it to store anything interesting
112 * about the hotk device
113 */
114 struct asus_hotk {
115 struct acpi_device *device; /* the device we are in */
116 acpi_handle handle; /* the handle of the hotk device */
117 char status; /* status of the hotk, for LEDs */
118 u32 ledd_status; /* status of the LED display */
119 struct model_data *methods; /* methods available on the laptop */
120 u8 brightness; /* brightness level */
121 enum {
122 A1x = 0, /* A1340D, A1300F */
123 A2x, /* A2500H */
124 A4G, /* A4700G */
125 D1x, /* D1 */
126 L2D, /* L2000D */
127 L3C, /* L3800C */
128 L3D, /* L3400D */
129 L3H, /* L3H, L2000E, L5D */
130 L4R, /* L4500R */
131 L5x, /* L5800C */
132 L8L, /* L8400L */
133 M1A, /* M1300A */
134 M2E, /* M2400E, L4400L */
135 M6N, /* M6800N, W3400N */
136 M6R, /* M6700R, A3000G */
137 P30, /* Samsung P30 */
138 S1x, /* S1300A, but also L1400B and M2400A (L84F) */
139 S2x, /* S200 (J1 reported), Victor MP-XP7210 */
140 W1N, /* W1000N */
141 W5A, /* W5A */
142 W3V, /* W3030V */
143 xxN, /* M2400N, M3700N, M5200N, M6800N,
144 S1300N, S5200N*/
145 A4S, /* Z81sp */
146 F3Sa, /* (Centrino) */
147 R1F,
148 END_MODEL
149 } model; /* Models currently supported */
150 u16 event_count[128]; /* Count for each event TODO make this better */
151 };
152
153 /* Here we go */
154 #define A1x_PREFIX "\\_SB.PCI0.ISA.EC0."
155 #define L3C_PREFIX "\\_SB.PCI0.PX40.ECD0."
156 #define M1A_PREFIX "\\_SB.PCI0.PX40.EC0."
157 #define P30_PREFIX "\\_SB.PCI0.LPCB.EC0."
158 #define S1x_PREFIX "\\_SB.PCI0.PX40."
159 #define S2x_PREFIX A1x_PREFIX
160 #define xxN_PREFIX "\\_SB.PCI0.SBRG.EC0."
161
162 static struct model_data model_conf[END_MODEL] = {
163 /*
164 * TODO I have seen a SWBX and AIBX method on some models, like L1400B,
165 * it seems to be a kind of switch, but what for ?
166 */
167
168 {
169 .name = "A1x",
170 .mt_mled = "MLED",
171 .mled_status = "\\MAIL",
172 .mt_lcd_switch = A1x_PREFIX "_Q10",
173 .lcd_status = "\\BKLI",
174 .brightness_up = A1x_PREFIX "_Q0E",
175 .brightness_down = A1x_PREFIX "_Q0F"},
176
177 {
178 .name = "A2x",
179 .mt_mled = "MLED",
180 .mt_wled = "WLED",
181 .wled_status = "\\SG66",
182 .mt_lcd_switch = "\\Q10",
183 .lcd_status = "\\BAOF",
184 .brightness_set = "SPLV",
185 .brightness_get = "GPLV",
186 .display_set = "SDSP",
187 .display_get = "\\INFB"},
188
189 {
190 .name = "A4G",
191 .mt_mled = "MLED",
192 /* WLED present, but not controlled by ACPI */
193 .mt_lcd_switch = xxN_PREFIX "_Q10",
194 .brightness_set = "SPLV",
195 .brightness_get = "GPLV",
196 .display_set = "SDSP",
197 .display_get = "\\ADVG"},
198
199 {
200 .name = "D1x",
201 .mt_mled = "MLED",
202 .mt_lcd_switch = "\\Q0D",
203 .lcd_status = "\\GP11",
204 .brightness_up = "\\Q0C",
205 .brightness_down = "\\Q0B",
206 .brightness_status = "\\BLVL",
207 .display_set = "SDSP",
208 .display_get = "\\INFB"},
209
210 {
211 .name = "L2D",
212 .mt_mled = "MLED",
213 .mled_status = "\\SGP6",
214 .mt_wled = "WLED",
215 .wled_status = "\\RCP3",
216 .mt_lcd_switch = "\\Q10",
217 .lcd_status = "\\SGP0",
218 .brightness_up = "\\Q0E",
219 .brightness_down = "\\Q0F",
220 .display_set = "SDSP",
221 .display_get = "\\INFB"},
222
223 {
224 .name = "L3C",
225 .mt_mled = "MLED",
226 .mt_wled = "WLED",
227 .mt_lcd_switch = L3C_PREFIX "_Q10",
228 .lcd_status = "\\GL32",
229 .brightness_set = "SPLV",
230 .brightness_get = "GPLV",
231 .display_set = "SDSP",
232 .display_get = "\\_SB.PCI0.PCI1.VGAC.NMAP"},
233
234 {
235 .name = "L3D",
236 .mt_mled = "MLED",
237 .mled_status = "\\MALD",
238 .mt_wled = "WLED",
239 .mt_lcd_switch = "\\Q10",
240 .lcd_status = "\\BKLG",
241 .brightness_set = "SPLV",
242 .brightness_get = "GPLV",
243 .display_set = "SDSP",
244 .display_get = "\\INFB"},
245
246 {
247 .name = "L3H",
248 .mt_mled = "MLED",
249 .mt_wled = "WLED",
250 .mt_lcd_switch = "EHK",
251 .lcd_status = "\\_SB.PCI0.PM.PBC",
252 .brightness_set = "SPLV",
253 .brightness_get = "GPLV",
254 .display_set = "SDSP",
255 .display_get = "\\INFB"},
256
257 {
258 .name = "L4R",
259 .mt_mled = "MLED",
260 .mt_wled = "WLED",
261 .wled_status = "\\_SB.PCI0.SBRG.SG13",
262 .mt_lcd_switch = xxN_PREFIX "_Q10",
263 .lcd_status = "\\_SB.PCI0.SBSM.SEO4",
264 .brightness_set = "SPLV",
265 .brightness_get = "GPLV",
266 .display_set = "SDSP",
267 .display_get = "\\_SB.PCI0.P0P1.VGA.GETD"},
268
269 {
270 .name = "L5x",
271 .mt_mled = "MLED",
272 /* WLED present, but not controlled by ACPI */
273 .mt_tled = "TLED",
274 .mt_lcd_switch = "\\Q0D",
275 .lcd_status = "\\BAOF",
276 .brightness_set = "SPLV",
277 .brightness_get = "GPLV",
278 .display_set = "SDSP",
279 .display_get = "\\INFB"},
280
281 {
282 .name = "L8L"
283 /* No features, but at least support the hotkeys */
284 },
285
286 {
287 .name = "M1A",
288 .mt_mled = "MLED",
289 .mt_lcd_switch = M1A_PREFIX "Q10",
290 .lcd_status = "\\PNOF",
291 .brightness_up = M1A_PREFIX "Q0E",
292 .brightness_down = M1A_PREFIX "Q0F",
293 .brightness_status = "\\BRIT",
294 .display_set = "SDSP",
295 .display_get = "\\INFB"},
296
297 {
298 .name = "M2E",
299 .mt_mled = "MLED",
300 .mt_wled = "WLED",
301 .mt_lcd_switch = "\\Q10",
302 .lcd_status = "\\GP06",
303 .brightness_set = "SPLV",
304 .brightness_get = "GPLV",
305 .display_set = "SDSP",
306 .display_get = "\\INFB"},
307
308 {
309 .name = "M6N",
310 .mt_mled = "MLED",
311 .mt_wled = "WLED",
312 .wled_status = "\\_SB.PCI0.SBRG.SG13",
313 .mt_lcd_switch = xxN_PREFIX "_Q10",
314 .lcd_status = "\\_SB.BKLT",
315 .brightness_set = "SPLV",
316 .brightness_get = "GPLV",
317 .display_set = "SDSP",
318 .display_get = "\\SSTE"},
319
320 {
321 .name = "M6R",
322 .mt_mled = "MLED",
323 .mt_wled = "WLED",
324 .mt_lcd_switch = xxN_PREFIX "_Q10",
325 .lcd_status = "\\_SB.PCI0.SBSM.SEO4",
326 .brightness_set = "SPLV",
327 .brightness_get = "GPLV",
328 .display_set = "SDSP",
329 .display_get = "\\_SB.PCI0.P0P1.VGA.GETD"},
330
331 {
332 .name = "P30",
333 .mt_wled = "WLED",
334 .mt_lcd_switch = P30_PREFIX "_Q0E",
335 .lcd_status = "\\BKLT",
336 .brightness_up = P30_PREFIX "_Q68",
337 .brightness_down = P30_PREFIX "_Q69",
338 .brightness_get = "GPLV",
339 .display_set = "SDSP",
340 .display_get = "\\DNXT"},
341
342 {
343 .name = "S1x",
344 .mt_mled = "MLED",
345 .mled_status = "\\EMLE",
346 .mt_wled = "WLED",
347 .mt_lcd_switch = S1x_PREFIX "Q10",
348 .lcd_status = "\\PNOF",
349 .brightness_set = "SPLV",
350 .brightness_get = "GPLV"},
351
352 {
353 .name = "S2x",
354 .mt_mled = "MLED",
355 .mled_status = "\\MAIL",
356 .mt_lcd_switch = S2x_PREFIX "_Q10",
357 .lcd_status = "\\BKLI",
358 .brightness_up = S2x_PREFIX "_Q0B",
359 .brightness_down = S2x_PREFIX "_Q0A"},
360
361 {
362 .name = "W1N",
363 .mt_mled = "MLED",
364 .mt_wled = "WLED",
365 .mt_ledd = "SLCM",
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 .name = "W5A",
375 .mt_bt_switch = "BLED",
376 .mt_wled = "WLED",
377 .mt_lcd_switch = xxN_PREFIX "_Q10",
378 .brightness_set = "SPLV",
379 .brightness_get = "GPLV",
380 .display_set = "SDSP",
381 .display_get = "\\ADVG"},
382
383 {
384 .name = "W3V",
385 .mt_mled = "MLED",
386 .mt_wled = "WLED",
387 .mt_lcd_switch = xxN_PREFIX "_Q10",
388 .lcd_status = "\\BKLT",
389 .brightness_set = "SPLV",
390 .brightness_get = "GPLV",
391 .display_set = "SDSP",
392 .display_get = "\\INFB"},
393
394 {
395 .name = "xxN",
396 .mt_mled = "MLED",
397 /* WLED present, but not controlled by ACPI */
398 .mt_lcd_switch = xxN_PREFIX "_Q10",
399 .lcd_status = "\\BKLT",
400 .brightness_set = "SPLV",
401 .brightness_get = "GPLV",
402 .display_set = "SDSP",
403 .display_get = "\\ADVG"},
404
405 {
406 .name = "A4S",
407 .brightness_set = "SPLV",
408 .brightness_get = "GPLV",
409 .mt_bt_switch = "BLED",
410 .mt_wled = "WLED"
411 },
412
413 {
414 .name = "F3Sa",
415 .mt_bt_switch = "BLED",
416 .mt_wled = "WLED",
417 .mt_mled = "MLED",
418 .brightness_get = "GPLV",
419 .brightness_set = "SPLV",
420 .mt_lcd_switch = "\\_SB.PCI0.SBRG.EC0._Q10",
421 .lcd_status = "\\_SB.PCI0.SBRG.EC0.RPIN",
422 .display_get = "\\ADVG",
423 .display_set = "SDSP",
424 },
425 {
426 .name = "R1F",
427 .mt_bt_switch = "BLED",
428 .mt_mled = "MLED",
429 .mt_wled = "WLED",
430 .mt_lcd_switch = "\\Q10",
431 .lcd_status = "\\GP06",
432 .brightness_set = "SPLV",
433 .brightness_get = "GPLV",
434 .display_set = "SDSP",
435 .display_get = "\\INFB"
436 }
437 };
438
439 /* procdir we use */
440 static struct proc_dir_entry *asus_proc_dir;
441
442 static struct backlight_device *asus_backlight_device;
443
444 /*
445 * This header is made available to allow proper configuration given model,
446 * revision number , ... this info cannot go in struct asus_hotk because it is
447 * available before the hotk
448 */
449 static struct acpi_table_header *asus_info;
450
451 /* The actual device the driver binds to */
452 static struct asus_hotk *hotk;
453
454 /*
455 * The hotkey driver and autoloading declaration
456 */
457 static int asus_hotk_add(struct acpi_device *device);
458 static int asus_hotk_remove(struct acpi_device *device, int type);
459 static void asus_hotk_notify(struct acpi_device *device, u32 event);
460
461 static const struct acpi_device_id asus_device_ids[] = {
462 {"ATK0100", 0},
463 {"", 0},
464 };
465 MODULE_DEVICE_TABLE(acpi, asus_device_ids);
466
467 static struct acpi_driver asus_hotk_driver = {
468 .name = "asus_acpi",
469 .class = ACPI_HOTK_CLASS,
470 .owner = THIS_MODULE,
471 .ids = asus_device_ids,
472 .flags = ACPI_DRIVER_ALL_NOTIFY_EVENTS,
473 .ops = {
474 .add = asus_hotk_add,
475 .remove = asus_hotk_remove,
476 .notify = asus_hotk_notify,
477 },
478 };
479
480 /*
481 * This function evaluates an ACPI method, given an int as parameter, the
482 * method is searched within the scope of the handle, can be NULL. The output
483 * of the method is written is output, which can also be NULL
484 *
485 * returns 1 if write is successful, 0 else.
486 */
487 static int write_acpi_int(acpi_handle handle, const char *method, int val,
488 struct acpi_buffer *output)
489 {
490 struct acpi_object_list params; /* list of input parameters (int) */
491 union acpi_object in_obj; /* the only param we use */
492 acpi_status status;
493
494 params.count = 1;
495 params.pointer = &in_obj;
496 in_obj.type = ACPI_TYPE_INTEGER;
497 in_obj.integer.value = val;
498
499 status = acpi_evaluate_object(handle, (char *)method, &params, output);
500 return (status == AE_OK);
501 }
502
503 static int read_acpi_int(acpi_handle handle, const char *method, int *val)
504 {
505 struct acpi_buffer output;
506 union acpi_object out_obj;
507 acpi_status status;
508
509 output.length = sizeof(out_obj);
510 output.pointer = &out_obj;
511
512 status = acpi_evaluate_object(handle, (char *)method, NULL, &output);
513 *val = out_obj.integer.value;
514 return (status == AE_OK) && (out_obj.type == ACPI_TYPE_INTEGER);
515 }
516
517 static int asus_info_proc_show(struct seq_file *m, void *v)
518 {
519 int temp;
520
521 seq_printf(m, ACPI_HOTK_NAME " " ASUS_ACPI_VERSION "\n");
522 seq_printf(m, "Model reference : %s\n", hotk->methods->name);
523 /*
524 * The SFUN method probably allows the original driver to get the list
525 * of features supported by a given model. For now, 0x0100 or 0x0800
526 * bit signifies that the laptop is equipped with a Wi-Fi MiniPCI card.
527 * The significance of others is yet to be found.
528 */
529 if (read_acpi_int(hotk->handle, "SFUN", &temp))
530 seq_printf(m, "SFUN value : 0x%04x\n", temp);
531 /*
532 * Another value for userspace: the ASYM method returns 0x02 for
533 * battery low and 0x04 for battery critical, its readings tend to be
534 * more accurate than those provided by _BST.
535 * Note: since not all the laptops provide this method, errors are
536 * silently ignored.
537 */
538 if (read_acpi_int(hotk->handle, "ASYM", &temp))
539 seq_printf(m, "ASYM value : 0x%04x\n", temp);
540 if (asus_info) {
541 seq_printf(m, "DSDT length : %d\n", asus_info->length);
542 seq_printf(m, "DSDT checksum : %d\n", asus_info->checksum);
543 seq_printf(m, "DSDT revision : %d\n", asus_info->revision);
544 seq_printf(m, "OEM id : %.*s\n", ACPI_OEM_ID_SIZE, asus_info->oem_id);
545 seq_printf(m, "OEM table id : %.*s\n", ACPI_OEM_TABLE_ID_SIZE, asus_info->oem_table_id);
546 seq_printf(m, "OEM revision : 0x%x\n", asus_info->oem_revision);
547 seq_printf(m, "ASL comp vendor id : %.*s\n", ACPI_NAME_SIZE, asus_info->asl_compiler_id);
548 seq_printf(m, "ASL comp revision : 0x%x\n", asus_info->asl_compiler_revision);
549 }
550
551 return 0;
552 }
553
554 static int asus_info_proc_open(struct inode *inode, struct file *file)
555 {
556 return single_open(file, asus_info_proc_show, NULL);
557 }
558
559 static const struct file_operations asus_info_proc_fops = {
560 .owner = THIS_MODULE,
561 .open = asus_info_proc_open,
562 .read = seq_read,
563 .llseek = seq_lseek,
564 .release = single_release,
565 };
566
567 /*
568 * /proc handlers
569 * We write our info in page, we begin at offset off and cannot write more
570 * than count bytes. We set eof to 1 if we handle those 2 values. We return the
571 * number of bytes written in page
572 */
573
574 /* Generic LED functions */
575 static int read_led(const char *ledname, int ledmask)
576 {
577 if (ledname) {
578 int led_status;
579
580 if (read_acpi_int(NULL, ledname, &led_status))
581 return led_status;
582 else
583 printk(KERN_WARNING "Asus ACPI: Error reading LED "
584 "status\n");
585 }
586 return (hotk->status & ledmask) ? 1 : 0;
587 }
588
589 static int parse_arg(const char __user *buf, unsigned long count, int *val)
590 {
591 char s[32];
592 if (!count)
593 return 0;
594 if (count > 31)
595 return -EINVAL;
596 if (copy_from_user(s, buf, count))
597 return -EFAULT;
598 s[count] = 0;
599 if (sscanf(s, "%i", val) != 1)
600 return -EINVAL;
601 return count;
602 }
603
604 /* FIXME: kill extraneous args so it can be called independently */
605 static int
606 write_led(const char __user *buffer, unsigned long count,
607 char *ledname, int ledmask, int invert)
608 {
609 int rv, value;
610 int led_out = 0;
611
612 rv = parse_arg(buffer, count, &value);
613 if (rv > 0)
614 led_out = value ? 1 : 0;
615
616 hotk->status =
617 (led_out) ? (hotk->status | ledmask) : (hotk->status & ~ledmask);
618
619 if (invert) /* invert target value */
620 led_out = !led_out;
621
622 if (!write_acpi_int(hotk->handle, ledname, led_out, NULL))
623 printk(KERN_WARNING "Asus ACPI: LED (%s) write failed\n",
624 ledname);
625
626 return rv;
627 }
628
629 /*
630 * Proc handlers for MLED
631 */
632 static int mled_proc_show(struct seq_file *m, void *v)
633 {
634 seq_printf(m, "%d\n", read_led(hotk->methods->mled_status, MLED_ON));
635 return 0;
636 }
637
638 static int mled_proc_open(struct inode *inode, struct file *file)
639 {
640 return single_open(file, mled_proc_show, NULL);
641 }
642
643 static ssize_t mled_proc_write(struct file *file, const char __user *buffer,
644 size_t count, loff_t *pos)
645 {
646 return write_led(buffer, count, hotk->methods->mt_mled, MLED_ON, 1);
647 }
648
649 static const struct file_operations mled_proc_fops = {
650 .owner = THIS_MODULE,
651 .open = mled_proc_open,
652 .read = seq_read,
653 .llseek = seq_lseek,
654 .release = single_release,
655 .write = mled_proc_write,
656 };
657
658 /*
659 * Proc handlers for LED display
660 */
661 static int ledd_proc_show(struct seq_file *m, void *v)
662 {
663 seq_printf(m, "0x%08x\n", hotk->ledd_status);
664 return 0;
665 }
666
667 static int ledd_proc_open(struct inode *inode, struct file *file)
668 {
669 return single_open(file, ledd_proc_show, NULL);
670 }
671
672 static ssize_t ledd_proc_write(struct file *file, const char __user *buffer,
673 size_t count, loff_t *pos)
674 {
675 int rv, value;
676
677 rv = parse_arg(buffer, count, &value);
678 if (rv > 0) {
679 if (!write_acpi_int
680 (hotk->handle, hotk->methods->mt_ledd, value, NULL))
681 printk(KERN_WARNING
682 "Asus ACPI: LED display write failed\n");
683 else
684 hotk->ledd_status = (u32) value;
685 }
686 return rv;
687 }
688
689 static const struct file_operations ledd_proc_fops = {
690 .owner = THIS_MODULE,
691 .open = ledd_proc_open,
692 .read = seq_read,
693 .llseek = seq_lseek,
694 .release = single_release,
695 .write = ledd_proc_write,
696 };
697
698 /*
699 * Proc handlers for WLED
700 */
701 static int wled_proc_show(struct seq_file *m, void *v)
702 {
703 seq_printf(m, "%d\n", read_led(hotk->methods->wled_status, WLED_ON));
704 return 0;
705 }
706
707 static int wled_proc_open(struct inode *inode, struct file *file)
708 {
709 return single_open(file, wled_proc_show, NULL);
710 }
711
712 static ssize_t wled_proc_write(struct file *file, const char __user *buffer,
713 size_t count, loff_t *pos)
714 {
715 return write_led(buffer, count, hotk->methods->mt_wled, WLED_ON, 0);
716 }
717
718 static const struct file_operations wled_proc_fops = {
719 .owner = THIS_MODULE,
720 .open = wled_proc_open,
721 .read = seq_read,
722 .llseek = seq_lseek,
723 .release = single_release,
724 .write = wled_proc_write,
725 };
726
727 /*
728 * Proc handlers for Bluetooth
729 */
730 static int bluetooth_proc_show(struct seq_file *m, void *v)
731 {
732 seq_printf(m, "%d\n", read_led(hotk->methods->bt_status, BT_ON));
733 return 0;
734 }
735
736 static int bluetooth_proc_open(struct inode *inode, struct file *file)
737 {
738 return single_open(file, bluetooth_proc_show, NULL);
739 }
740
741 static ssize_t bluetooth_proc_write(struct file *file,
742 const char __user *buffer, size_t count, loff_t *pos)
743 {
744 /* Note: mt_bt_switch controls both internal Bluetooth adapter's
745 presence and its LED */
746 return write_led(buffer, count, hotk->methods->mt_bt_switch, BT_ON, 0);
747 }
748
749 static const struct file_operations bluetooth_proc_fops = {
750 .owner = THIS_MODULE,
751 .open = bluetooth_proc_open,
752 .read = seq_read,
753 .llseek = seq_lseek,
754 .release = single_release,
755 .write = bluetooth_proc_write,
756 };
757
758 /*
759 * Proc handlers for TLED
760 */
761 static int tled_proc_show(struct seq_file *m, void *v)
762 {
763 seq_printf(m, "%d\n", read_led(hotk->methods->tled_status, TLED_ON));
764 return 0;
765 }
766
767 static int tled_proc_open(struct inode *inode, struct file *file)
768 {
769 return single_open(file, tled_proc_show, NULL);
770 }
771
772 static ssize_t tled_proc_write(struct file *file, const char __user *buffer,
773 size_t count, loff_t *pos)
774 {
775 return write_led(buffer, count, hotk->methods->mt_tled, TLED_ON, 0);
776 }
777
778 static const struct file_operations tled_proc_fops = {
779 .owner = THIS_MODULE,
780 .open = tled_proc_open,
781 .read = seq_read,
782 .llseek = seq_lseek,
783 .release = single_release,
784 .write = tled_proc_write,
785 };
786
787 static int get_lcd_state(void)
788 {
789 int lcd = 0;
790
791 if (hotk->model == L3H) {
792 /* L3H and the like have to be handled differently */
793 acpi_status status = 0;
794 struct acpi_object_list input;
795 union acpi_object mt_params[2];
796 struct acpi_buffer output;
797 union acpi_object out_obj;
798
799 input.count = 2;
800 input.pointer = mt_params;
801 /* Note: the following values are partly guessed up, but
802 otherwise they seem to work */
803 mt_params[0].type = ACPI_TYPE_INTEGER;
804 mt_params[0].integer.value = 0x02;
805 mt_params[1].type = ACPI_TYPE_INTEGER;
806 mt_params[1].integer.value = 0x02;
807
808 output.length = sizeof(out_obj);
809 output.pointer = &out_obj;
810
811 status =
812 acpi_evaluate_object(NULL, hotk->methods->lcd_status,
813 &input, &output);
814 if (status != AE_OK)
815 return -1;
816 if (out_obj.type == ACPI_TYPE_INTEGER)
817 /* That's what the AML code does */
818 lcd = out_obj.integer.value >> 8;
819 } else if (hotk->model == F3Sa) {
820 unsigned long long tmp;
821 union acpi_object param;
822 struct acpi_object_list input;
823 acpi_status status;
824
825 /* Read pin 11 */
826 param.type = ACPI_TYPE_INTEGER;
827 param.integer.value = 0x11;
828 input.count = 1;
829 input.pointer = &param;
830
831 status = acpi_evaluate_integer(NULL, hotk->methods->lcd_status,
832 &input, &tmp);
833 if (status != AE_OK)
834 return -1;
835
836 lcd = tmp;
837 } else {
838 /* We don't have to check anything if we are here */
839 if (!read_acpi_int(NULL, hotk->methods->lcd_status, &lcd))
840 printk(KERN_WARNING
841 "Asus ACPI: Error reading LCD status\n");
842
843 if (hotk->model == L2D)
844 lcd = ~lcd;
845 }
846
847 return (lcd & 1);
848 }
849
850 static int set_lcd_state(int value)
851 {
852 int lcd = 0;
853 acpi_status status = 0;
854
855 lcd = value ? 1 : 0;
856 if (lcd != get_lcd_state()) {
857 /* switch */
858 if (hotk->model != L3H) {
859 status =
860 acpi_evaluate_object(NULL,
861 hotk->methods->mt_lcd_switch,
862 NULL, NULL);
863 } else {
864 /* L3H and the like must be handled differently */
865 if (!write_acpi_int
866 (hotk->handle, hotk->methods->mt_lcd_switch, 0x07,
867 NULL))
868 status = AE_ERROR;
869 /* L3H's AML executes EHK (0x07) upon Fn+F7 keypress,
870 the exact behaviour is simulated here */
871 }
872 if (ACPI_FAILURE(status))
873 printk(KERN_WARNING "Asus ACPI: Error switching LCD\n");
874 }
875 return 0;
876
877 }
878
879 static int lcd_proc_show(struct seq_file *m, void *v)
880 {
881 seq_printf(m, "%d\n", get_lcd_state());
882 return 0;
883 }
884
885 static int lcd_proc_open(struct inode *inode, struct file *file)
886 {
887 return single_open(file, lcd_proc_show, NULL);
888 }
889
890 static ssize_t lcd_proc_write(struct file *file, const char __user *buffer,
891 size_t count, loff_t *pos)
892 {
893 int rv, value;
894
895 rv = parse_arg(buffer, count, &value);
896 if (rv > 0)
897 set_lcd_state(value);
898 return rv;
899 }
900
901 static const struct file_operations lcd_proc_fops = {
902 .owner = THIS_MODULE,
903 .open = lcd_proc_open,
904 .read = seq_read,
905 .llseek = seq_lseek,
906 .release = single_release,
907 .write = lcd_proc_write,
908 };
909
910 static int read_brightness(struct backlight_device *bd)
911 {
912 int value;
913
914 if (hotk->methods->brightness_get) { /* SPLV/GPLV laptop */
915 if (!read_acpi_int(hotk->handle, hotk->methods->brightness_get,
916 &value))
917 printk(KERN_WARNING
918 "Asus ACPI: Error reading brightness\n");
919 } else if (hotk->methods->brightness_status) { /* For D1 for example */
920 if (!read_acpi_int(NULL, hotk->methods->brightness_status,
921 &value))
922 printk(KERN_WARNING
923 "Asus ACPI: Error reading brightness\n");
924 } else /* No GPLV method */
925 value = hotk->brightness;
926 return value;
927 }
928
929 /*
930 * Change the brightness level
931 */
932 static int set_brightness(int value)
933 {
934 acpi_status status = 0;
935 int ret = 0;
936
937 /* SPLV laptop */
938 if (hotk->methods->brightness_set) {
939 if (!write_acpi_int(hotk->handle, hotk->methods->brightness_set,
940 value, NULL))
941 printk(KERN_WARNING
942 "Asus ACPI: Error changing brightness\n");
943 ret = -EIO;
944 goto out;
945 }
946
947 /* No SPLV method if we are here, act as appropriate */
948 value -= read_brightness(NULL);
949 while (value != 0) {
950 status = acpi_evaluate_object(NULL, (value > 0) ?
951 hotk->methods->brightness_up :
952 hotk->methods->brightness_down,
953 NULL, NULL);
954 (value > 0) ? value-- : value++;
955 if (ACPI_FAILURE(status))
956 printk(KERN_WARNING
957 "Asus ACPI: Error changing brightness\n");
958 ret = -EIO;
959 }
960 out:
961 return ret;
962 }
963
964 static int set_brightness_status(struct backlight_device *bd)
965 {
966 return set_brightness(bd->props.brightness);
967 }
968
969 static int brn_proc_show(struct seq_file *m, void *v)
970 {
971 seq_printf(m, "%d\n", read_brightness(NULL));
972 return 0;
973 }
974
975 static int brn_proc_open(struct inode *inode, struct file *file)
976 {
977 return single_open(file, brn_proc_show, NULL);
978 }
979
980 static ssize_t brn_proc_write(struct file *file, const char __user *buffer,
981 size_t count, loff_t *pos)
982 {
983 int rv, value;
984
985 rv = parse_arg(buffer, count, &value);
986 if (rv > 0) {
987 value = (0 < value) ? ((15 < value) ? 15 : value) : 0;
988 /* 0 <= value <= 15 */
989 set_brightness(value);
990 }
991 return rv;
992 }
993
994 static const struct file_operations brn_proc_fops = {
995 .owner = THIS_MODULE,
996 .open = brn_proc_open,
997 .read = seq_read,
998 .llseek = seq_lseek,
999 .release = single_release,
1000 .write = brn_proc_write,
1001 };
1002
1003 static void set_display(int value)
1004 {
1005 /* no sanity check needed for now */
1006 if (!write_acpi_int(hotk->handle, hotk->methods->display_set,
1007 value, NULL))
1008 printk(KERN_WARNING "Asus ACPI: Error setting display\n");
1009 return;
1010 }
1011
1012 /*
1013 * Now, *this* one could be more user-friendly, but so far, no-one has
1014 * complained. The significance of bits is the same as in proc_write_disp()
1015 */
1016 static int disp_proc_show(struct seq_file *m, void *v)
1017 {
1018 int value = 0;
1019
1020 if (!read_acpi_int(hotk->handle, hotk->methods->display_get, &value))
1021 printk(KERN_WARNING
1022 "Asus ACPI: Error reading display status\n");
1023 value &= 0x07; /* needed for some models, shouldn't hurt others */
1024 seq_printf(m, "%d\n", value);
1025 return 0;
1026 }
1027
1028 static int disp_proc_open(struct inode *inode, struct file *file)
1029 {
1030 return single_open(file, disp_proc_show, NULL);
1031 }
1032
1033 /*
1034 * Experimental support for display switching. As of now: 1 should activate
1035 * the LCD output, 2 should do for CRT, and 4 for TV-Out. Any combination
1036 * (bitwise) of these will suffice. I never actually tested 3 displays hooked
1037 * up simultaneously, so be warned. See the acpi4asus README for more info.
1038 */
1039 static ssize_t disp_proc_write(struct file *file, const char __user *buffer,
1040 size_t count, loff_t *pos)
1041 {
1042 int rv, value;
1043
1044 rv = parse_arg(buffer, count, &value);
1045 if (rv > 0)
1046 set_display(value);
1047 return rv;
1048 }
1049
1050 static const struct file_operations disp_proc_fops = {
1051 .owner = THIS_MODULE,
1052 .open = disp_proc_open,
1053 .read = seq_read,
1054 .llseek = seq_lseek,
1055 .release = single_release,
1056 .write = disp_proc_write,
1057 };
1058
1059 static int
1060 asus_proc_add(char *name, const struct file_operations *proc_fops, mode_t mode,
1061 struct acpi_device *device)
1062 {
1063 struct proc_dir_entry *proc;
1064
1065 proc = proc_create_data(name, mode, acpi_device_dir(device),
1066 proc_fops, acpi_driver_data(device));
1067 if (!proc) {
1068 printk(KERN_WARNING " Unable to create %s fs entry\n", name);
1069 return -1;
1070 }
1071 proc->uid = asus_uid;
1072 proc->gid = asus_gid;
1073 return 0;
1074 }
1075
1076 static int asus_hotk_add_fs(struct acpi_device *device)
1077 {
1078 struct proc_dir_entry *proc;
1079 mode_t mode;
1080
1081 /*
1082 * If parameter uid or gid is not changed, keep the default setting for
1083 * our proc entries (-rw-rw-rw-) else, it means we care about security,
1084 * and then set to -rw-rw----
1085 */
1086
1087 if ((asus_uid == 0) && (asus_gid == 0)) {
1088 mode = S_IFREG | S_IRUGO | S_IWUGO;
1089 } else {
1090 mode = S_IFREG | S_IRUSR | S_IRGRP | S_IWUSR | S_IWGRP;
1091 printk(KERN_WARNING " asus_uid and asus_gid parameters are "
1092 "deprecated, use chown and chmod instead!\n");
1093 }
1094
1095 acpi_device_dir(device) = asus_proc_dir;
1096 if (!acpi_device_dir(device))
1097 return -ENODEV;
1098
1099 proc = proc_create(PROC_INFO, mode, acpi_device_dir(device),
1100 &asus_info_proc_fops);
1101 if (proc) {
1102 proc->uid = asus_uid;
1103 proc->gid = asus_gid;
1104 } else {
1105 printk(KERN_WARNING " Unable to create " PROC_INFO
1106 " fs entry\n");
1107 }
1108
1109 if (hotk->methods->mt_wled) {
1110 asus_proc_add(PROC_WLED, &wled_proc_fops, mode, device);
1111 }
1112
1113 if (hotk->methods->mt_ledd) {
1114 asus_proc_add(PROC_LEDD, &ledd_proc_fops, mode, device);
1115 }
1116
1117 if (hotk->methods->mt_mled) {
1118 asus_proc_add(PROC_MLED, &mled_proc_fops, mode, device);
1119 }
1120
1121 if (hotk->methods->mt_tled) {
1122 asus_proc_add(PROC_TLED, &tled_proc_fops, mode, device);
1123 }
1124
1125 if (hotk->methods->mt_bt_switch) {
1126 asus_proc_add(PROC_BT, &bluetooth_proc_fops, mode, device);
1127 }
1128
1129 /*
1130 * We need both read node and write method as LCD switch is also
1131 * accessible from the keyboard
1132 */
1133 if (hotk->methods->mt_lcd_switch && hotk->methods->lcd_status) {
1134 asus_proc_add(PROC_LCD, &lcd_proc_fops, mode, device);
1135 }
1136
1137 if ((hotk->methods->brightness_up && hotk->methods->brightness_down) ||
1138 (hotk->methods->brightness_get && hotk->methods->brightness_set)) {
1139 asus_proc_add(PROC_BRN, &brn_proc_fops, mode, device);
1140 }
1141
1142 if (hotk->methods->display_set) {
1143 asus_proc_add(PROC_DISP, &disp_proc_fops, mode, device);
1144 }
1145
1146 return 0;
1147 }
1148
1149 static int asus_hotk_remove_fs(struct acpi_device *device)
1150 {
1151 if (acpi_device_dir(device)) {
1152 remove_proc_entry(PROC_INFO, acpi_device_dir(device));
1153 if (hotk->methods->mt_wled)
1154 remove_proc_entry(PROC_WLED, acpi_device_dir(device));
1155 if (hotk->methods->mt_mled)
1156 remove_proc_entry(PROC_MLED, acpi_device_dir(device));
1157 if (hotk->methods->mt_tled)
1158 remove_proc_entry(PROC_TLED, acpi_device_dir(device));
1159 if (hotk->methods->mt_ledd)
1160 remove_proc_entry(PROC_LEDD, acpi_device_dir(device));
1161 if (hotk->methods->mt_bt_switch)
1162 remove_proc_entry(PROC_BT, acpi_device_dir(device));
1163 if (hotk->methods->mt_lcd_switch && hotk->methods->lcd_status)
1164 remove_proc_entry(PROC_LCD, acpi_device_dir(device));
1165 if ((hotk->methods->brightness_up
1166 && hotk->methods->brightness_down)
1167 || (hotk->methods->brightness_get
1168 && hotk->methods->brightness_set))
1169 remove_proc_entry(PROC_BRN, acpi_device_dir(device));
1170 if (hotk->methods->display_set)
1171 remove_proc_entry(PROC_DISP, acpi_device_dir(device));
1172 }
1173 return 0;
1174 }
1175
1176 static void asus_hotk_notify(struct acpi_device *device, u32 event)
1177 {
1178 /* TODO Find a better way to handle events count. */
1179 if (!hotk)
1180 return;
1181
1182 /*
1183 * The BIOS *should* be sending us device events, but apparently
1184 * Asus uses system events instead, so just ignore any device
1185 * events we get.
1186 */
1187 if (event > ACPI_MAX_SYS_NOTIFY)
1188 return;
1189
1190 if ((event & ~((u32) BR_UP)) < 16)
1191 hotk->brightness = (event & ~((u32) BR_UP));
1192 else if ((event & ~((u32) BR_DOWN)) < 16)
1193 hotk->brightness = (event & ~((u32) BR_DOWN));
1194
1195 acpi_bus_generate_proc_event(hotk->device, event,
1196 hotk->event_count[event % 128]++);
1197
1198 return;
1199 }
1200
1201 /*
1202 * Match the model string to the list of supported models. Return END_MODEL if
1203 * no match or model is NULL.
1204 */
1205 static int asus_model_match(char *model)
1206 {
1207 if (model == NULL)
1208 return END_MODEL;
1209
1210 if (strncmp(model, "L3D", 3) == 0)
1211 return L3D;
1212 else if (strncmp(model, "L2E", 3) == 0 ||
1213 strncmp(model, "L3H", 3) == 0 || strncmp(model, "L5D", 3) == 0)
1214 return L3H;
1215 else if (strncmp(model, "L3", 2) == 0 || strncmp(model, "L2B", 3) == 0)
1216 return L3C;
1217 else if (strncmp(model, "L8L", 3) == 0)
1218 return L8L;
1219 else if (strncmp(model, "L4R", 3) == 0)
1220 return L4R;
1221 else if (strncmp(model, "M6N", 3) == 0 || strncmp(model, "W3N", 3) == 0)
1222 return M6N;
1223 else if (strncmp(model, "M6R", 3) == 0 || strncmp(model, "A3G", 3) == 0)
1224 return M6R;
1225 else if (strncmp(model, "M2N", 3) == 0 ||
1226 strncmp(model, "M3N", 3) == 0 ||
1227 strncmp(model, "M5N", 3) == 0 ||
1228 strncmp(model, "S1N", 3) == 0 ||
1229 strncmp(model, "S5N", 3) == 0)
1230 return xxN;
1231 else if (strncmp(model, "M1", 2) == 0)
1232 return M1A;
1233 else if (strncmp(model, "M2", 2) == 0 || strncmp(model, "L4E", 3) == 0)
1234 return M2E;
1235 else if (strncmp(model, "L2", 2) == 0)
1236 return L2D;
1237 else if (strncmp(model, "L8", 2) == 0)
1238 return S1x;
1239 else if (strncmp(model, "D1", 2) == 0)
1240 return D1x;
1241 else if (strncmp(model, "A1", 2) == 0)
1242 return A1x;
1243 else if (strncmp(model, "A2", 2) == 0)
1244 return A2x;
1245 else if (strncmp(model, "J1", 2) == 0)
1246 return S2x;
1247 else if (strncmp(model, "L5", 2) == 0)
1248 return L5x;
1249 else if (strncmp(model, "A4G", 3) == 0)
1250 return A4G;
1251 else if (strncmp(model, "W1N", 3) == 0)
1252 return W1N;
1253 else if (strncmp(model, "W3V", 3) == 0)
1254 return W3V;
1255 else if (strncmp(model, "W5A", 3) == 0)
1256 return W5A;
1257 else if (strncmp(model, "R1F", 3) == 0)
1258 return R1F;
1259 else if (strncmp(model, "A4S", 3) == 0)
1260 return A4S;
1261 else if (strncmp(model, "F3Sa", 4) == 0)
1262 return F3Sa;
1263 else
1264 return END_MODEL;
1265 }
1266
1267 /*
1268 * This function is used to initialize the hotk with right values. In this
1269 * method, we can make all the detection we want, and modify the hotk struct
1270 */
1271 static int asus_hotk_get_info(void)
1272 {
1273 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
1274 union acpi_object *model = NULL;
1275 int bsts_result;
1276 char *string = NULL;
1277 acpi_status status;
1278
1279 /*
1280 * Get DSDT headers early enough to allow for differentiating between
1281 * models, but late enough to allow acpi_bus_register_driver() to fail
1282 * before doing anything ACPI-specific. Should we encounter a machine,
1283 * which needs special handling (i.e. its hotkey device has a different
1284 * HID), this bit will be moved. A global variable asus_info contains
1285 * the DSDT header.
1286 */
1287 status = acpi_get_table(ACPI_SIG_DSDT, 1, &asus_info);
1288 if (ACPI_FAILURE(status))
1289 printk(KERN_WARNING " Couldn't get the DSDT table header\n");
1290
1291 /* We have to write 0 on init this far for all ASUS models */
1292 if (!write_acpi_int(hotk->handle, "INIT", 0, &buffer)) {
1293 printk(KERN_ERR " Hotkey initialization failed\n");
1294 return -ENODEV;
1295 }
1296
1297 /* This needs to be called for some laptops to init properly */
1298 if (!read_acpi_int(hotk->handle, "BSTS", &bsts_result))
1299 printk(KERN_WARNING " Error calling BSTS\n");
1300 else if (bsts_result)
1301 printk(KERN_NOTICE " BSTS called, 0x%02x returned\n",
1302 bsts_result);
1303
1304 /*
1305 * Try to match the object returned by INIT to the specific model.
1306 * Handle every possible object (or the lack of thereof) the DSDT
1307 * writers might throw at us. When in trouble, we pass NULL to
1308 * asus_model_match() and try something completely different.
1309 */
1310 if (buffer.pointer) {
1311 model = buffer.pointer;
1312 switch (model->type) {
1313 case ACPI_TYPE_STRING:
1314 string = model->string.pointer;
1315 break;
1316 case ACPI_TYPE_BUFFER:
1317 string = model->buffer.pointer;
1318 break;
1319 default:
1320 kfree(model);
1321 model = NULL;
1322 break;
1323 }
1324 }
1325 hotk->model = asus_model_match(string);
1326 if (hotk->model == END_MODEL) { /* match failed */
1327 if (asus_info &&
1328 strncmp(asus_info->oem_table_id, "ODEM", 4) == 0) {
1329 hotk->model = P30;
1330 printk(KERN_NOTICE
1331 " Samsung P30 detected, supported\n");
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 hotk->methods = &model_conf[hotk->model];
1342 return AE_OK;
1343 }
1344 hotk->methods = &model_conf[hotk->model];
1345 printk(KERN_NOTICE " %s model detected, supported\n", string);
1346
1347 /* Sort of per-model blacklist */
1348 if (strncmp(string, "L2B", 3) == 0)
1349 hotk->methods->lcd_status = NULL;
1350 /* L2B is similar enough to L3C to use its settings, with this only
1351 exception */
1352 else if (strncmp(string, "A3G", 3) == 0)
1353 hotk->methods->lcd_status = "\\BLFG";
1354 /* A3G is like M6R */
1355 else if (strncmp(string, "S5N", 3) == 0 ||
1356 strncmp(string, "M5N", 3) == 0 ||
1357 strncmp(string, "W3N", 3) == 0)
1358 hotk->methods->mt_mled = NULL;
1359 /* S5N, M5N and W3N have no MLED */
1360 else if (strncmp(string, "L5D", 3) == 0)
1361 hotk->methods->mt_wled = NULL;
1362 /* L5D's WLED is not controlled by ACPI */
1363 else if (strncmp(string, "M2N", 3) == 0 ||
1364 strncmp(string, "W3V", 3) == 0 ||
1365 strncmp(string, "S1N", 3) == 0)
1366 hotk->methods->mt_wled = "WLED";
1367 /* M2N, S1N and W3V have a usable WLED */
1368 else if (asus_info) {
1369 if (strncmp(asus_info->oem_table_id, "L1", 2) == 0)
1370 hotk->methods->mled_status = NULL;
1371 /* S1300A reports L84F, but L1400B too, account for that */
1372 }
1373
1374 kfree(model);
1375
1376 return AE_OK;
1377 }
1378
1379 static int asus_hotk_check(void)
1380 {
1381 int result = 0;
1382
1383 result = acpi_bus_get_status(hotk->device);
1384 if (result)
1385 return result;
1386
1387 if (hotk->device->status.present) {
1388 result = asus_hotk_get_info();
1389 } else {
1390 printk(KERN_ERR " Hotkey device not present, aborting\n");
1391 return -EINVAL;
1392 }
1393
1394 return result;
1395 }
1396
1397 static int asus_hotk_found;
1398
1399 static int asus_hotk_add(struct acpi_device *device)
1400 {
1401 acpi_status status = AE_OK;
1402 int result;
1403
1404 printk(KERN_NOTICE "Asus Laptop ACPI Extras version %s\n",
1405 ASUS_ACPI_VERSION);
1406
1407 hotk = kzalloc(sizeof(struct asus_hotk), GFP_KERNEL);
1408 if (!hotk)
1409 return -ENOMEM;
1410
1411 hotk->handle = device->handle;
1412 strcpy(acpi_device_name(device), ACPI_HOTK_DEVICE_NAME);
1413 strcpy(acpi_device_class(device), ACPI_HOTK_CLASS);
1414 device->driver_data = hotk;
1415 hotk->device = device;
1416
1417 result = asus_hotk_check();
1418 if (result)
1419 goto end;
1420
1421 result = asus_hotk_add_fs(device);
1422 if (result)
1423 goto end;
1424
1425 /* For laptops without GPLV: init the hotk->brightness value */
1426 if ((!hotk->methods->brightness_get)
1427 && (!hotk->methods->brightness_status)
1428 && (hotk->methods->brightness_up && hotk->methods->brightness_down)) {
1429 status =
1430 acpi_evaluate_object(NULL, hotk->methods->brightness_down,
1431 NULL, NULL);
1432 if (ACPI_FAILURE(status))
1433 printk(KERN_WARNING " Error changing brightness\n");
1434 else {
1435 status =
1436 acpi_evaluate_object(NULL,
1437 hotk->methods->brightness_up,
1438 NULL, NULL);
1439 if (ACPI_FAILURE(status))
1440 printk(KERN_WARNING " Strange, error changing"
1441 " brightness\n");
1442 }
1443 }
1444
1445 asus_hotk_found = 1;
1446
1447 /* LED display is off by default */
1448 hotk->ledd_status = 0xFFF;
1449
1450 end:
1451 if (result)
1452 kfree(hotk);
1453
1454 return result;
1455 }
1456
1457 static int asus_hotk_remove(struct acpi_device *device, int type)
1458 {
1459 asus_hotk_remove_fs(device);
1460
1461 kfree(hotk);
1462
1463 return 0;
1464 }
1465
1466 static struct backlight_ops asus_backlight_data = {
1467 .get_brightness = read_brightness,
1468 .update_status = set_brightness_status,
1469 };
1470
1471 static void asus_acpi_exit(void)
1472 {
1473 if (asus_backlight_device)
1474 backlight_device_unregister(asus_backlight_device);
1475
1476 acpi_bus_unregister_driver(&asus_hotk_driver);
1477 remove_proc_entry(PROC_ASUS, acpi_root_dir);
1478
1479 return;
1480 }
1481
1482 static int __init asus_acpi_init(void)
1483 {
1484 struct backlight_properties props;
1485 int result;
1486
1487 result = acpi_bus_register_driver(&asus_hotk_driver);
1488 if (result < 0)
1489 return result;
1490
1491 asus_proc_dir = proc_mkdir(PROC_ASUS, acpi_root_dir);
1492 if (!asus_proc_dir) {
1493 printk(KERN_ERR "Asus ACPI: Unable to create /proc entry\n");
1494 acpi_bus_unregister_driver(&asus_hotk_driver);
1495 return -ENODEV;
1496 }
1497
1498 /*
1499 * This is a bit of a kludge. We only want this module loaded
1500 * for ASUS systems, but there's currently no way to probe the
1501 * ACPI namespace for ASUS HIDs. So we just return failure if
1502 * we didn't find one, which will cause the module to be
1503 * unloaded.
1504 */
1505 if (!asus_hotk_found) {
1506 acpi_bus_unregister_driver(&asus_hotk_driver);
1507 remove_proc_entry(PROC_ASUS, acpi_root_dir);
1508 return -ENODEV;
1509 }
1510
1511 memset(&props, 0, sizeof(struct backlight_properties));
1512 props.max_brightness = 15;
1513 asus_backlight_device = backlight_device_register("asus", NULL, NULL,
1514 &asus_backlight_data,
1515 &props);
1516 if (IS_ERR(asus_backlight_device)) {
1517 printk(KERN_ERR "Could not register asus backlight device\n");
1518 asus_backlight_device = NULL;
1519 asus_acpi_exit();
1520 return -ENODEV;
1521 }
1522
1523 return 0;
1524 }
1525
1526 module_init(asus_acpi_init);
1527 module_exit(asus_acpi_exit);
kernel source for telekom puls (alcatel/mediatek)