2 * asus_acpi.c - Asus Laptop ACPI Extras
5 * Copyright (C) 2002-2005 Julien Lerouge, 2003-2006 Karol Kozimor
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.
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.
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
22 * The development page for this driver is located at
23 * http://sourceforge.net/projects/acpi4asus/
26 * Pontus Fuchs - Helper functions, cleanup
27 * Johann Wiesner - Small compile fixes
28 * John Belmonte - ACPI code for Toshiba laptop was a good starting point.
29 * Éric Burghard - LED display support for W1N
33 #include <linux/kernel.h>
34 #include <linux/module.h>
35 #include <linux/init.h>
36 #include <linux/types.h>
37 #include <linux/proc_fs.h>
38 #include <acpi/acpi_drivers.h>
39 #include <acpi/acpi_bus.h>
40 #include <asm/uaccess.h>
42 #define ASUS_ACPI_VERSION "0.30"
44 #define PROC_ASUS "asus" //the directory
45 #define PROC_MLED "mled"
46 #define PROC_WLED "wled"
47 #define PROC_TLED "tled"
48 #define PROC_LEDD "ledd"
49 #define PROC_INFO "info"
50 #define PROC_LCD "lcd"
51 #define PROC_BRN "brn"
52 #define PROC_DISP "disp"
54 #define ACPI_HOTK_NAME "Asus Laptop ACPI Extras Driver"
55 #define ACPI_HOTK_CLASS "hotkey"
56 #define ACPI_HOTK_DEVICE_NAME "Hotkey"
57 #define ACPI_HOTK_HID "ATK0100"
60 * Some events we use, same for all Asus
66 * Flags for hotk status
68 #define MLED_ON 0x01 //is MLED ON ?
72 MODULE_AUTHOR("Julien Lerouge, Karol Kozimor");
73 MODULE_DESCRIPTION(ACPI_HOTK_NAME);
74 MODULE_LICENSE("GPL");
76 static uid_t asus_uid;
77 static gid_t asus_gid;
78 module_param(asus_uid, uint, 0);
79 MODULE_PARM_DESC(asus_uid, "UID for entries in /proc/acpi/asus.\n");
80 module_param(asus_gid, uint, 0);
81 MODULE_PARM_DESC(asus_gid, "GID for entries in /proc/acpi/asus.\n");
83 /* For each model, all features implemented,
84 * those marked with R are relative to HOTK, A for absolute */
86 char *name; //name of the laptop________________A
87 char *mt_mled; //method to handle mled_____________R
88 char *mled_status; //node to handle mled reading_______A
89 char *mt_wled; //method to handle wled_____________R
90 char *wled_status; //node to handle wled reading_______A
91 char *mt_tled; //method to handle tled_____________R
92 char *tled_status; //node to handle tled reading_______A
93 char *mt_ledd; //method to handle LED display______R
94 char *mt_lcd_switch; //method to turn LCD ON/OFF_________A
95 char *lcd_status; //node to read LCD panel state______A
96 char *brightness_up; //method to set brightness up_______A
97 char *brightness_down; //guess what ?______________________A
98 char *brightness_set; //method to set absolute brightness_R
99 char *brightness_get; //method to get absolute brightness_R
100 char *brightness_status; //node to get brightness____________A
101 char *display_set; //method to set video output________R
102 char *display_get; //method to get video output________R
106 * This is the main structure, we can use it to store anything interesting
107 * about the hotk device
110 struct acpi_device *device; //the device we are in
111 acpi_handle handle; //the handle of the hotk device
112 char status; //status of the hotk, for LEDs, ...
113 u32 ledd_status; //status of the LED display
114 struct model_data *methods; //methods available on the laptop
115 u8 brightness; //brightness level
117 A1x = 0, //A1340D, A1300F
124 L3H, //L3H, but also L2000E
129 M2E, //M2400E, L4400L
130 M6N, //M6800N, W3400N
131 M6R, //M6700R, A3000G
133 S1x, //S1300A, but also L1400B and M2400A (L84F)
134 S2x, //S200 (J1 reported), Victor MP-XP7210
136 xxN, //M2400N, M3700N, M5200N, M6800N, S1300N, S5200N
139 } model; //Models currently supported
140 u16 event_count[128]; //count for each event TODO make this better
144 #define A1x_PREFIX "\\_SB.PCI0.ISA.EC0."
145 #define L3C_PREFIX "\\_SB.PCI0.PX40.ECD0."
146 #define M1A_PREFIX "\\_SB.PCI0.PX40.EC0."
147 #define P30_PREFIX "\\_SB.PCI0.LPCB.EC0."
148 #define S1x_PREFIX "\\_SB.PCI0.PX40."
149 #define S2x_PREFIX A1x_PREFIX
150 #define xxN_PREFIX "\\_SB.PCI0.SBRG.EC0."
152 static struct model_data model_conf[END_MODEL] = {
154 * TODO I have seen a SWBX and AIBX method on some models, like L1400B,
155 * it seems to be a kind of switch, but what for ?
161 .mled_status = "\\MAIL",
162 .mt_lcd_switch = A1x_PREFIX "_Q10",
163 .lcd_status = "\\BKLI",
164 .brightness_up = A1x_PREFIX "_Q0E",
165 .brightness_down = A1x_PREFIX "_Q0F"},
171 .wled_status = "\\SG66",
172 .mt_lcd_switch = "\\Q10",
173 .lcd_status = "\\BAOF",
174 .brightness_set = "SPLV",
175 .brightness_get = "GPLV",
176 .display_set = "SDSP",
177 .display_get = "\\INFB"},
182 /* WLED present, but not controlled by ACPI */
183 .mt_lcd_switch = xxN_PREFIX "_Q10",
184 .brightness_set = "SPLV",
185 .brightness_get = "GPLV",
186 .display_set = "SDSP",
187 .display_get = "\\ADVG"},
192 .mt_lcd_switch = "\\Q0D",
193 .lcd_status = "\\GP11",
194 .brightness_up = "\\Q0C",
195 .brightness_down = "\\Q0B",
196 .brightness_status = "\\BLVL",
197 .display_set = "SDSP",
198 .display_get = "\\INFB"},
203 .mled_status = "\\SGP6",
205 .wled_status = "\\RCP3",
206 .mt_lcd_switch = "\\Q10",
207 .lcd_status = "\\SGP0",
208 .brightness_up = "\\Q0E",
209 .brightness_down = "\\Q0F",
210 .display_set = "SDSP",
211 .display_get = "\\INFB"},
217 .mt_lcd_switch = L3C_PREFIX "_Q10",
218 .lcd_status = "\\GL32",
219 .brightness_set = "SPLV",
220 .brightness_get = "GPLV",
221 .display_set = "SDSP",
222 .display_get = "\\_SB.PCI0.PCI1.VGAC.NMAP"},
227 .mled_status = "\\MALD",
229 .mt_lcd_switch = "\\Q10",
230 .lcd_status = "\\BKLG",
231 .brightness_set = "SPLV",
232 .brightness_get = "GPLV",
233 .display_set = "SDSP",
234 .display_get = "\\INFB"},
240 .mt_lcd_switch = "EHK",
241 .lcd_status = "\\_SB.PCI0.PM.PBC",
242 .brightness_set = "SPLV",
243 .brightness_get = "GPLV",
244 .display_set = "SDSP",
245 .display_get = "\\INFB"},
251 .wled_status = "\\_SB.PCI0.SBRG.SG13",
252 .mt_lcd_switch = xxN_PREFIX "_Q10",
253 .lcd_status = "\\_SB.PCI0.SBSM.SEO4",
254 .brightness_set = "SPLV",
255 .brightness_get = "GPLV",
256 .display_set = "SDSP",
257 .display_get = "\\_SB.PCI0.P0P1.VGA.GETD"},
262 /* WLED present, but not controlled by ACPI */
264 .mt_lcd_switch = "\\Q0D",
265 .lcd_status = "\\BAOF",
266 .brightness_set = "SPLV",
267 .brightness_get = "GPLV",
268 .display_set = "SDSP",
269 .display_get = "\\INFB"},
273 /* No features, but at least support the hotkeys */
279 .mt_lcd_switch = M1A_PREFIX "Q10",
280 .lcd_status = "\\PNOF",
281 .brightness_up = M1A_PREFIX "Q0E",
282 .brightness_down = M1A_PREFIX "Q0F",
283 .brightness_status = "\\BRIT",
284 .display_set = "SDSP",
285 .display_get = "\\INFB"},
291 .mt_lcd_switch = "\\Q10",
292 .lcd_status = "\\GP06",
293 .brightness_set = "SPLV",
294 .brightness_get = "GPLV",
295 .display_set = "SDSP",
296 .display_get = "\\INFB"},
302 .wled_status = "\\_SB.PCI0.SBRG.SG13",
303 .mt_lcd_switch = xxN_PREFIX "_Q10",
304 .lcd_status = "\\_SB.BKLT",
305 .brightness_set = "SPLV",
306 .brightness_get = "GPLV",
307 .display_set = "SDSP",
308 .display_get = "\\_SB.PCI0.P0P1.VGA.GETD"},
313 .mt_lcd_switch = xxN_PREFIX "_Q10",
314 .lcd_status = "\\_SB.PCI0.SBSM.SEO4",
315 .brightness_set = "SPLV",
316 .brightness_get = "GPLV",
317 .display_set = "SDSP",
318 .display_get = "\\SSTE"},
323 .mt_lcd_switch = P30_PREFIX "_Q0E",
324 .lcd_status = "\\BKLT",
325 .brightness_up = P30_PREFIX "_Q68",
326 .brightness_down = P30_PREFIX "_Q69",
327 .brightness_get = "GPLV",
328 .display_set = "SDSP",
329 .display_get = "\\DNXT"},
334 .mled_status = "\\EMLE",
336 .mt_lcd_switch = S1x_PREFIX "Q10",
337 .lcd_status = "\\PNOF",
338 .brightness_set = "SPLV",
339 .brightness_get = "GPLV"},
344 .mled_status = "\\MAIL",
345 .mt_lcd_switch = S2x_PREFIX "_Q10",
346 .lcd_status = "\\BKLI",
347 .brightness_up = S2x_PREFIX "_Q0B",
348 .brightness_down = S2x_PREFIX "_Q0A"},
355 .mt_lcd_switch = xxN_PREFIX "_Q10",
356 .lcd_status = "\\BKLT",
357 .brightness_set = "SPLV",
358 .brightness_get = "GPLV",
359 .display_set = "SDSP",
360 .display_get = "\\ADVG"},
365 /* WLED present, but not controlled by ACPI */
366 .mt_lcd_switch = xxN_PREFIX "_Q10",
367 .lcd_status = "\\BKLT",
368 .brightness_set = "SPLV",
369 .brightness_get = "GPLV",
370 .display_set = "SDSP",
371 .display_get = "\\ADVG"}
375 static struct proc_dir_entry *asus_proc_dir;
378 * This header is made available to allow proper configuration given model,
379 * revision number , ... this info cannot go in struct asus_hotk because it is
380 * available before the hotk
382 static struct acpi_table_header *asus_info;
384 /* The actual device the driver binds to */
385 static struct asus_hotk *hotk;
388 * The hotkey driver declaration
390 static int asus_hotk_add(struct acpi_device *device);
391 static int asus_hotk_remove(struct acpi_device *device, int type);
392 static struct acpi_driver asus_hotk_driver = {
393 .name = ACPI_HOTK_NAME,
394 .class = ACPI_HOTK_CLASS,
395 .ids = ACPI_HOTK_HID,
397 .add = asus_hotk_add,
398 .remove = asus_hotk_remove,
403 * This function evaluates an ACPI method, given an int as parameter, the
404 * method is searched within the scope of the handle, can be NULL. The output
405 * of the method is written is output, which can also be NULL
407 * returns 1 if write is successful, 0 else.
409 static int write_acpi_int(acpi_handle handle, const char *method, int val,
410 struct acpi_buffer *output)
412 struct acpi_object_list params; //list of input parameters (an int here)
413 union acpi_object in_obj; //the only param we use
417 params.pointer = &in_obj;
418 in_obj.type = ACPI_TYPE_INTEGER;
419 in_obj.integer.value = val;
421 status = acpi_evaluate_object(handle, (char *)method, ¶ms, output);
422 return (status == AE_OK);
425 static int read_acpi_int(acpi_handle handle, const char *method, int *val)
427 struct acpi_buffer output;
428 union acpi_object out_obj;
431 output.length = sizeof(out_obj);
432 output.pointer = &out_obj;
434 status = acpi_evaluate_object(handle, (char *)method, NULL, &output);
435 *val = out_obj.integer.value;
436 return (status == AE_OK) && (out_obj.type == ACPI_TYPE_INTEGER);
440 * We write our info in page, we begin at offset off and cannot write more
441 * than count bytes. We set eof to 1 if we handle those 2 values. We return the
442 * number of bytes written in page
445 proc_read_info(char *page, char **start, off_t off, int count, int *eof,
450 char buf[16]; //enough for all info
452 * We use the easy way, we don't care of off and count, so we don't set eof
456 len += sprintf(page, ACPI_HOTK_NAME " " ASUS_ACPI_VERSION "\n");
457 len += sprintf(page + len, "Model reference : %s\n",
458 hotk->methods->name);
460 * The SFUN method probably allows the original driver to get the list
461 * of features supported by a given model. For now, 0x0100 or 0x0800
462 * bit signifies that the laptop is equipped with a Wi-Fi MiniPCI card.
463 * The significance of others is yet to be found.
465 if (read_acpi_int(hotk->handle, "SFUN", &temp))
467 sprintf(page + len, "SFUN value : 0x%04x\n", temp);
469 * Another value for userspace: the ASYM method returns 0x02 for
470 * battery low and 0x04 for battery critical, its readings tend to be
471 * more accurate than those provided by _BST.
472 * Note: since not all the laptops provide this method, errors are
475 if (read_acpi_int(hotk->handle, "ASYM", &temp))
477 sprintf(page + len, "ASYM value : 0x%04x\n", temp);
479 snprintf(buf, 16, "%d", asus_info->length);
480 len += sprintf(page + len, "DSDT length : %s\n", buf);
481 snprintf(buf, 16, "%d", asus_info->checksum);
482 len += sprintf(page + len, "DSDT checksum : %s\n", buf);
483 snprintf(buf, 16, "%d", asus_info->revision);
484 len += sprintf(page + len, "DSDT revision : %s\n", buf);
485 snprintf(buf, 7, "%s", asus_info->oem_id);
486 len += sprintf(page + len, "OEM id : %s\n", buf);
487 snprintf(buf, 9, "%s", asus_info->oem_table_id);
488 len += sprintf(page + len, "OEM table id : %s\n", buf);
489 snprintf(buf, 16, "%x", asus_info->oem_revision);
490 len += sprintf(page + len, "OEM revision : 0x%s\n", buf);
491 snprintf(buf, 5, "%s", asus_info->asl_compiler_id);
492 len += sprintf(page + len, "ASL comp vendor id : %s\n", buf);
493 snprintf(buf, 16, "%x", asus_info->asl_compiler_revision);
494 len += sprintf(page + len, "ASL comp revision : 0x%s\n", buf);
502 * We write our info in page, we begin at offset off and cannot write more
503 * than count bytes. We set eof to 1 if we handle those 2 values. We return the
504 * number of bytes written in page
507 /* Generic LED functions */
508 static int read_led(const char *ledname, int ledmask)
513 if (read_acpi_int(NULL, ledname, &led_status))
516 printk(KERN_WARNING "Asus ACPI: Error reading LED "
519 return (hotk->status & ledmask) ? 1 : 0;
522 static int parse_arg(const char __user * buf, unsigned long count, int *val)
529 if (copy_from_user(s, buf, count))
532 if (sscanf(s, "%i", val) != 1)
537 /* FIXME: kill extraneous args so it can be called independently */
539 write_led(const char __user * buffer, unsigned long count,
540 char *ledname, int ledmask, int invert)
545 count = parse_arg(buffer, count, &value);
547 led_out = value ? 1 : 0;
550 (led_out) ? (hotk->status | ledmask) : (hotk->status & ~ledmask);
552 if (invert) /* invert target value */
553 led_out = !led_out & 0x1;
555 if (!write_acpi_int(hotk->handle, ledname, led_out, NULL))
556 printk(KERN_WARNING "Asus ACPI: LED (%s) write failed\n",
563 * Proc handlers for MLED
566 proc_read_mled(char *page, char **start, off_t off, int count, int *eof,
569 return sprintf(page, "%d\n",
570 read_led(hotk->methods->mled_status, MLED_ON));
574 proc_write_mled(struct file *file, const char __user * buffer,
575 unsigned long count, void *data)
577 return write_led(buffer, count, hotk->methods->mt_mled, MLED_ON, 1);
581 * Proc handlers for LED display
584 proc_read_ledd(char *page, char **start, off_t off, int count, int *eof,
587 return sprintf(page, "0x%08x\n", hotk->ledd_status);
591 proc_write_ledd(struct file *file, const char __user * buffer,
592 unsigned long count, void *data)
596 count = parse_arg(buffer, count, &value);
599 (hotk->handle, hotk->methods->mt_ledd, value, NULL))
601 "Asus ACPI: LED display write failed\n");
603 hotk->ledd_status = (u32) value;
604 } else if (count < 0)
605 printk(KERN_WARNING "Asus ACPI: Error reading user input\n");
611 * Proc handlers for WLED
614 proc_read_wled(char *page, char **start, off_t off, int count, int *eof,
617 return sprintf(page, "%d\n",
618 read_led(hotk->methods->wled_status, WLED_ON));
622 proc_write_wled(struct file *file, const char __user * buffer,
623 unsigned long count, void *data)
625 return write_led(buffer, count, hotk->methods->mt_wled, WLED_ON, 0);
629 * Proc handlers for TLED
632 proc_read_tled(char *page, char **start, off_t off, int count, int *eof,
635 return sprintf(page, "%d\n",
636 read_led(hotk->methods->tled_status, TLED_ON));
640 proc_write_tled(struct file *file, const char __user * buffer,
641 unsigned long count, void *data)
643 return write_led(buffer, count, hotk->methods->mt_tled, TLED_ON, 0);
646 static int get_lcd_state(void)
650 if (hotk->model != L3H) {
651 /* We don't have to check anything if we are here */
652 if (!read_acpi_int(NULL, hotk->methods->lcd_status, &lcd))
654 "Asus ACPI: Error reading LCD status\n");
656 if (hotk->model == L2D)
658 } else { /* L3H and the like have to be handled differently */
659 acpi_status status = 0;
660 struct acpi_object_list input;
661 union acpi_object mt_params[2];
662 struct acpi_buffer output;
663 union acpi_object out_obj;
666 input.pointer = mt_params;
667 /* Note: the following values are partly guessed up, but
668 otherwise they seem to work */
669 mt_params[0].type = ACPI_TYPE_INTEGER;
670 mt_params[0].integer.value = 0x02;
671 mt_params[1].type = ACPI_TYPE_INTEGER;
672 mt_params[1].integer.value = 0x02;
674 output.length = sizeof(out_obj);
675 output.pointer = &out_obj;
678 acpi_evaluate_object(NULL, hotk->methods->lcd_status,
682 if (out_obj.type == ACPI_TYPE_INTEGER)
683 /* That's what the AML code does */
684 lcd = out_obj.integer.value >> 8;
690 static int set_lcd_state(int value)
693 acpi_status status = 0;
696 if (lcd != get_lcd_state()) {
698 if (hotk->model != L3H) {
700 acpi_evaluate_object(NULL,
701 hotk->methods->mt_lcd_switch,
703 } else { /* L3H and the like have to be handled differently */
705 (hotk->handle, hotk->methods->mt_lcd_switch, 0x07,
708 /* L3H's AML executes EHK (0x07) upon Fn+F7 keypress,
709 the exact behaviour is simulated here */
711 if (ACPI_FAILURE(status))
712 printk(KERN_WARNING "Asus ACPI: Error switching LCD\n");
719 proc_read_lcd(char *page, char **start, off_t off, int count, int *eof,
722 return sprintf(page, "%d\n", get_lcd_state());
726 proc_write_lcd(struct file *file, const char __user * buffer,
727 unsigned long count, void *data)
731 count = parse_arg(buffer, count, &value);
733 set_lcd_state(value);
737 static int read_brightness(void)
741 if (hotk->methods->brightness_get) { /* SPLV/GPLV laptop */
742 if (!read_acpi_int(hotk->handle, hotk->methods->brightness_get,
745 "Asus ACPI: Error reading brightness\n");
746 } else if (hotk->methods->brightness_status) { /* For D1 for example */
747 if (!read_acpi_int(NULL, hotk->methods->brightness_status,
750 "Asus ACPI: Error reading brightness\n");
751 } else /* No GPLV method */
752 value = hotk->brightness;
757 * Change the brightness level
759 static void set_brightness(int value)
761 acpi_status status = 0;
764 if (hotk->methods->brightness_set) {
765 if (!write_acpi_int(hotk->handle, hotk->methods->brightness_set,
768 "Asus ACPI: Error changing brightness\n");
772 /* No SPLV method if we are here, act as appropriate */
773 value -= read_brightness();
775 status = acpi_evaluate_object(NULL, (value > 0) ?
776 hotk->methods->brightness_up :
777 hotk->methods->brightness_down,
779 (value > 0) ? value-- : value++;
780 if (ACPI_FAILURE(status))
782 "Asus ACPI: Error changing brightness\n");
788 proc_read_brn(char *page, char **start, off_t off, int count, int *eof,
791 return sprintf(page, "%d\n", read_brightness());
795 proc_write_brn(struct file *file, const char __user * buffer,
796 unsigned long count, void *data)
800 count = parse_arg(buffer, count, &value);
802 value = (0 < value) ? ((15 < value) ? 15 : value) : 0;
803 /* 0 <= value <= 15 */
804 set_brightness(value);
805 } else if (count < 0) {
806 printk(KERN_WARNING "Asus ACPI: Error reading user input\n");
812 static void set_display(int value)
814 /* no sanity check needed for now */
815 if (!write_acpi_int(hotk->handle, hotk->methods->display_set,
817 printk(KERN_WARNING "Asus ACPI: Error setting display\n");
822 * Now, *this* one could be more user-friendly, but so far, no-one has
823 * complained. The significance of bits is the same as in proc_write_disp()
826 proc_read_disp(char *page, char **start, off_t off, int count, int *eof,
831 if (!read_acpi_int(hotk->handle, hotk->methods->display_get, &value))
833 "Asus ACPI: Error reading display status\n");
834 value &= 0x07; /* needed for some models, shouldn't hurt others */
835 return sprintf(page, "%d\n", value);
839 * Experimental support for display switching. As of now: 1 should activate
840 * the LCD output, 2 should do for CRT, and 4 for TV-Out. Any combination
841 * (bitwise) of these will suffice. I never actually tested 3 displays hooked up
842 * simultaneously, so be warned. See the acpi4asus README for more info.
845 proc_write_disp(struct file *file, const char __user * buffer,
846 unsigned long count, void *data)
850 count = parse_arg(buffer, count, &value);
854 printk(KERN_WARNING "Asus ACPI: Error reading user input\n");
859 typedef int (proc_readfunc) (char *page, char **start, off_t off, int count,
860 int *eof, void *data);
861 typedef int (proc_writefunc) (struct file * file, const char __user * buffer,
862 unsigned long count, void *data);
865 asus_proc_add(char *name, proc_writefunc * writefunc,
866 proc_readfunc * readfunc, mode_t mode,
867 struct acpi_device *device)
869 struct proc_dir_entry *proc =
870 create_proc_entry(name, mode, acpi_device_dir(device));
872 printk(KERN_WARNING " Unable to create %s fs entry\n", name);
875 proc->write_proc = writefunc;
876 proc->read_proc = readfunc;
877 proc->data = acpi_driver_data(device);
878 proc->owner = THIS_MODULE;
879 proc->uid = asus_uid;
880 proc->gid = asus_gid;
884 static int asus_hotk_add_fs(struct acpi_device *device)
886 struct proc_dir_entry *proc;
890 * If parameter uid or gid is not changed, keep the default setting for
891 * our proc entries (-rw-rw-rw-) else, it means we care about security,
892 * and then set to -rw-rw----
895 if ((asus_uid == 0) && (asus_gid == 0)) {
896 mode = S_IFREG | S_IRUGO | S_IWUGO;
898 mode = S_IFREG | S_IRUSR | S_IRGRP | S_IWUSR | S_IWGRP;
899 printk(KERN_WARNING " asus_uid and asus_gid parameters are "
900 "deprecated, use chown and chmod instead!\n");
903 acpi_device_dir(device) = asus_proc_dir;
904 if (!acpi_device_dir(device))
907 proc = create_proc_entry(PROC_INFO, mode, acpi_device_dir(device));
909 proc->read_proc = proc_read_info;
910 proc->data = acpi_driver_data(device);
911 proc->owner = THIS_MODULE;
912 proc->uid = asus_uid;
913 proc->gid = asus_gid;
915 printk(KERN_WARNING " Unable to create " PROC_INFO
919 if (hotk->methods->mt_wled) {
920 asus_proc_add(PROC_WLED, &proc_write_wled, &proc_read_wled,
924 if (hotk->methods->mt_ledd) {
925 asus_proc_add(PROC_LEDD, &proc_write_ledd, &proc_read_ledd,
929 if (hotk->methods->mt_mled) {
930 asus_proc_add(PROC_MLED, &proc_write_mled, &proc_read_mled,
934 if (hotk->methods->mt_tled) {
935 asus_proc_add(PROC_TLED, &proc_write_tled, &proc_read_tled,
940 * We need both read node and write method as LCD switch is also accessible
943 if (hotk->methods->mt_lcd_switch && hotk->methods->lcd_status) {
944 asus_proc_add(PROC_LCD, &proc_write_lcd, &proc_read_lcd, mode,
948 if ((hotk->methods->brightness_up && hotk->methods->brightness_down) ||
949 (hotk->methods->brightness_get && hotk->methods->brightness_set)) {
950 asus_proc_add(PROC_BRN, &proc_write_brn, &proc_read_brn, mode,
954 if (hotk->methods->display_set) {
955 asus_proc_add(PROC_DISP, &proc_write_disp, &proc_read_disp,
962 static int asus_hotk_remove_fs(struct acpi_device *device)
964 if (acpi_device_dir(device)) {
965 remove_proc_entry(PROC_INFO, acpi_device_dir(device));
966 if (hotk->methods->mt_wled)
967 remove_proc_entry(PROC_WLED, acpi_device_dir(device));
968 if (hotk->methods->mt_mled)
969 remove_proc_entry(PROC_MLED, acpi_device_dir(device));
970 if (hotk->methods->mt_tled)
971 remove_proc_entry(PROC_TLED, acpi_device_dir(device));
972 if (hotk->methods->mt_ledd)
973 remove_proc_entry(PROC_LEDD, acpi_device_dir(device));
974 if (hotk->methods->mt_lcd_switch && hotk->methods->lcd_status)
975 remove_proc_entry(PROC_LCD, acpi_device_dir(device));
976 if ((hotk->methods->brightness_up
977 && hotk->methods->brightness_down)
978 || (hotk->methods->brightness_get
979 && hotk->methods->brightness_set))
980 remove_proc_entry(PROC_BRN, acpi_device_dir(device));
981 if (hotk->methods->display_set)
982 remove_proc_entry(PROC_DISP, acpi_device_dir(device));
987 static void asus_hotk_notify(acpi_handle handle, u32 event, void *data)
989 /* TODO Find a better way to handle events count. */
993 if ((event & ~((u32) BR_UP)) < 16) {
994 hotk->brightness = (event & ~((u32) BR_UP));
995 } else if ((event & ~((u32) BR_DOWN)) < 16) {
996 hotk->brightness = (event & ~((u32) BR_DOWN));
999 acpi_bus_generate_event(hotk->device, event,
1000 hotk->event_count[event % 128]++);
1006 * This function is used to initialize the hotk with right values. In this
1007 * method, we can make all the detection we want, and modify the hotk struct
1009 static int asus_hotk_get_info(void)
1011 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
1012 struct acpi_buffer dsdt = { ACPI_ALLOCATE_BUFFER, NULL };
1013 union acpi_object *model = NULL;
1018 * Get DSDT headers early enough to allow for differentiating between
1019 * models, but late enough to allow acpi_bus_register_driver() to fail
1020 * before doing anything ACPI-specific. Should we encounter a machine,
1021 * which needs special handling (i.e. its hotkey device has a different
1022 * HID), this bit will be moved. A global variable asus_info contains
1025 status = acpi_get_table(ACPI_TABLE_ID_DSDT, 1, &dsdt);
1026 if (ACPI_FAILURE(status))
1027 printk(KERN_WARNING " Couldn't get the DSDT table header\n");
1029 asus_info = (struct acpi_table_header *)dsdt.pointer;
1031 /* We have to write 0 on init this far for all ASUS models */
1032 if (!write_acpi_int(hotk->handle, "INIT", 0, &buffer)) {
1033 printk(KERN_ERR " Hotkey initialization failed\n");
1037 /* This needs to be called for some laptops to init properly */
1038 if (!read_acpi_int(hotk->handle, "BSTS", &bsts_result))
1039 printk(KERN_WARNING " Error calling BSTS\n");
1040 else if (bsts_result)
1041 printk(KERN_NOTICE " BSTS called, 0x%02x returned\n",
1044 /* This is unlikely with implicit return */
1045 if (buffer.pointer == NULL)
1048 model = (union acpi_object *)buffer.pointer;
1050 * Samsung P30 has a device with a valid _HID whose INIT does not
1051 * return anything. It used to be possible to catch this exception,
1052 * but the implicit return code will now happily confuse the
1053 * driver. We assume that every ACPI_TYPE_STRING is a valid model
1054 * identifier but it's still possible to get completely bogus data.
1056 if (model->type == ACPI_TYPE_STRING) {
1057 printk(KERN_NOTICE " %s model detected, ",
1058 model->string.pointer);
1060 if (asus_info && /* Samsung P30 */
1061 strncmp(asus_info->oem_table_id, "ODEM", 4) == 0) {
1064 " Samsung P30 detected, supported\n");
1067 printk(KERN_WARNING " no string returned by INIT\n");
1068 printk(KERN_WARNING " trying default values, supply "
1069 "the developers with your DSDT\n");
1071 hotk->methods = &model_conf[hotk->model];
1078 hotk->model = END_MODEL;
1079 if (strncmp(model->string.pointer, "L3D", 3) == 0)
1081 else if (strncmp(model->string.pointer, "L3H", 3) == 0 ||
1082 strncmp(model->string.pointer, "L2E", 3) == 0)
1084 else if (strncmp(model->string.pointer, "L3", 2) == 0 ||
1085 strncmp(model->string.pointer, "L2B", 3) == 0)
1087 else if (strncmp(model->string.pointer, "L8L", 3) == 0)
1089 else if (strncmp(model->string.pointer, "L4R", 3) == 0)
1091 else if (strncmp(model->string.pointer, "M6N", 3) == 0 ||
1092 strncmp(model->string.pointer, "W3N", 3) == 0)
1094 else if (strncmp(model->string.pointer, "M6R", 3) == 0 ||
1095 strncmp(model->string.pointer, "A3G", 3) == 0)
1097 else if (strncmp(model->string.pointer, "M2N", 3) == 0 ||
1098 strncmp(model->string.pointer, "M3N", 3) == 0 ||
1099 strncmp(model->string.pointer, "M5N", 3) == 0 ||
1100 strncmp(model->string.pointer, "M6N", 3) == 0 ||
1101 strncmp(model->string.pointer, "S1N", 3) == 0 ||
1102 strncmp(model->string.pointer, "S5N", 3) == 0)
1104 else if (strncmp(model->string.pointer, "M1", 2) == 0)
1106 else if (strncmp(model->string.pointer, "M2", 2) == 0 ||
1107 strncmp(model->string.pointer, "L4E", 3) == 0)
1109 else if (strncmp(model->string.pointer, "L2", 2) == 0)
1111 else if (strncmp(model->string.pointer, "L8", 2) == 0)
1113 else if (strncmp(model->string.pointer, "D1", 2) == 0)
1115 else if (strncmp(model->string.pointer, "A1", 2) == 0)
1117 else if (strncmp(model->string.pointer, "A2", 2) == 0)
1119 else if (strncmp(model->string.pointer, "J1", 2) == 0)
1121 else if (strncmp(model->string.pointer, "L5", 2) == 0)
1123 else if (strncmp(model->string.pointer, "A4G", 3) == 0)
1125 else if (strncmp(model->string.pointer, "W1N", 3) == 0)
1128 if (hotk->model == END_MODEL) {
1129 printk("unsupported, trying default values, supply the "
1130 "developers with your DSDT\n");
1133 printk("supported\n");
1136 hotk->methods = &model_conf[hotk->model];
1138 /* Sort of per-model blacklist */
1139 if (strncmp(model->string.pointer, "L2B", 3) == 0)
1140 hotk->methods->lcd_status = NULL;
1141 /* L2B is similar enough to L3C to use its settings, with this only
1143 else if (strncmp(model->string.pointer, "A3G", 3) == 0)
1144 hotk->methods->lcd_status = "\\BLFG";
1145 /* A3G is like M6R */
1146 else if (strncmp(model->string.pointer, "S5N", 3) == 0 ||
1147 strncmp(model->string.pointer, "M5N", 3) == 0 ||
1148 strncmp(model->string.pointer, "W3N", 3) == 0)
1149 hotk->methods->mt_mled = NULL;
1150 /* S5N, M5N and W3N have no MLED */
1151 else if (strncmp(model->string.pointer, "M2N", 3) == 0)
1152 hotk->methods->mt_wled = "WLED";
1153 /* M2N has a usable WLED */
1154 else if (asus_info) {
1155 if (strncmp(asus_info->oem_table_id, "L1", 2) == 0)
1156 hotk->methods->mled_status = NULL;
1157 /* S1300A reports L84F, but L1400B too, account for that */
1165 static int asus_hotk_check(void)
1169 result = acpi_bus_get_status(hotk->device);
1173 if (hotk->device->status.present) {
1174 result = asus_hotk_get_info();
1176 printk(KERN_ERR " Hotkey device not present, aborting\n");
1183 static int asus_hotk_found;
1185 static int asus_hotk_add(struct acpi_device *device)
1187 acpi_status status = AE_OK;
1193 printk(KERN_NOTICE "Asus Laptop ACPI Extras version %s\n",
1197 (struct asus_hotk *)kmalloc(sizeof(struct asus_hotk), GFP_KERNEL);
1200 memset(hotk, 0, sizeof(struct asus_hotk));
1202 hotk->handle = device->handle;
1203 strcpy(acpi_device_name(device), ACPI_HOTK_DEVICE_NAME);
1204 strcpy(acpi_device_class(device), ACPI_HOTK_CLASS);
1205 acpi_driver_data(device) = hotk;
1206 hotk->device = device;
1208 result = asus_hotk_check();
1212 result = asus_hotk_add_fs(device);
1217 * We install the handler, it will receive the hotk in parameter, so, we
1218 * could add other data to the hotk struct
1220 status = acpi_install_notify_handler(hotk->handle, ACPI_SYSTEM_NOTIFY,
1221 asus_hotk_notify, hotk);
1222 if (ACPI_FAILURE(status))
1223 printk(KERN_ERR " Error installing notify handler\n");
1225 /* For laptops without GPLV: init the hotk->brightness value */
1226 if ((!hotk->methods->brightness_get)
1227 && (!hotk->methods->brightness_status)
1228 && (hotk->methods->brightness_up && hotk->methods->brightness_down)) {
1230 acpi_evaluate_object(NULL, hotk->methods->brightness_down,
1232 if (ACPI_FAILURE(status))
1233 printk(KERN_WARNING " Error changing brightness\n");
1236 acpi_evaluate_object(NULL,
1237 hotk->methods->brightness_up,
1239 if (ACPI_FAILURE(status))
1240 printk(KERN_WARNING " Strange, error changing"
1245 asus_hotk_found = 1;
1247 /* LED display is off by default */
1248 hotk->ledd_status = 0xFFF;
1258 static int asus_hotk_remove(struct acpi_device *device, int type)
1260 acpi_status status = 0;
1262 if (!device || !acpi_driver_data(device))
1265 status = acpi_remove_notify_handler(hotk->handle, ACPI_SYSTEM_NOTIFY,
1267 if (ACPI_FAILURE(status))
1268 printk(KERN_ERR "Asus ACPI: Error removing notify handler\n");
1270 asus_hotk_remove_fs(device);
1277 static int __init asus_acpi_init(void)
1284 if (!acpi_specific_hotkey_enabled) {
1285 printk(KERN_ERR "Using generic hotkey driver\n");
1288 asus_proc_dir = proc_mkdir(PROC_ASUS, acpi_root_dir);
1289 if (!asus_proc_dir) {
1290 printk(KERN_ERR "Asus ACPI: Unable to create /proc entry\n");
1293 asus_proc_dir->owner = THIS_MODULE;
1295 result = acpi_bus_register_driver(&asus_hotk_driver);
1297 remove_proc_entry(PROC_ASUS, acpi_root_dir);
1302 * This is a bit of a kludge. We only want this module loaded
1303 * for ASUS systems, but there's currently no way to probe the
1304 * ACPI namespace for ASUS HIDs. So we just return failure if
1305 * we didn't find one, which will cause the module to be
1308 if (!asus_hotk_found) {
1309 acpi_bus_unregister_driver(&asus_hotk_driver);
1310 remove_proc_entry(PROC_ASUS, acpi_root_dir);
1317 static void __exit asus_acpi_exit(void)
1319 acpi_bus_unregister_driver(&asus_hotk_driver);
1320 remove_proc_entry(PROC_ASUS, acpi_root_dir);
1327 module_init(asus_acpi_init);
1328 module_exit(asus_acpi_exit);