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_BT "bluetooth"
49 #define PROC_LEDD "ledd"
50 #define PROC_INFO "info"
51 #define PROC_LCD "lcd"
52 #define PROC_BRN "brn"
53 #define PROC_DISP "disp"
55 #define ACPI_HOTK_NAME "Asus Laptop ACPI Extras Driver"
56 #define ACPI_HOTK_CLASS "hotkey"
57 #define ACPI_HOTK_DEVICE_NAME "Hotkey"
58 #define ACPI_HOTK_HID "ATK0100"
61 * Some events we use, same for all Asus
67 * Flags for hotk status
69 #define MLED_ON 0x01 //mail LED
70 #define WLED_ON 0x02 //wireless LED
71 #define TLED_ON 0x04 //touchpad LED
72 #define BT_ON 0x08 //internal Bluetooth
74 MODULE_AUTHOR("Julien Lerouge, Karol Kozimor");
75 MODULE_DESCRIPTION(ACPI_HOTK_NAME);
76 MODULE_LICENSE("GPL");
78 static uid_t asus_uid;
79 static gid_t asus_gid;
80 module_param(asus_uid, uint, 0);
81 MODULE_PARM_DESC(asus_uid, "UID for entries in /proc/acpi/asus.\n");
82 module_param(asus_gid, uint, 0);
83 MODULE_PARM_DESC(asus_gid, "GID for entries in /proc/acpi/asus.\n");
85 /* For each model, all features implemented,
86 * those marked with R are relative to HOTK, A for absolute */
88 char *name; //name of the laptop________________A
89 char *mt_mled; //method to handle mled_____________R
90 char *mled_status; //node to handle mled reading_______A
91 char *mt_wled; //method to handle wled_____________R
92 char *wled_status; //node to handle wled reading_______A
93 char *mt_tled; //method to handle tled_____________R
94 char *tled_status; //node to handle tled reading_______A
95 char *mt_ledd; //method to handle LED display______R
96 char *mt_bt_switch; //method to switch Bluetooth on/off_R
97 char *bt_status; //no model currently supports this__?
98 char *mt_lcd_switch; //method to turn LCD on/off_________A
99 char *lcd_status; //node to read LCD panel state______A
100 char *brightness_up; //method to set brightness up_______A
101 char *brightness_down; //guess what ?______________________A
102 char *brightness_set; //method to set absolute brightness_R
103 char *brightness_get; //method to get absolute brightness_R
104 char *brightness_status; //node to get brightness____________A
105 char *display_set; //method to set video output________R
106 char *display_get; //method to get video output________R
110 * This is the main structure, we can use it to store anything interesting
111 * about the hotk device
114 struct acpi_device *device; //the device we are in
115 acpi_handle handle; //the handle of the hotk device
116 char status; //status of the hotk, for LEDs, ...
117 u32 ledd_status; //status of the LED display
118 struct model_data *methods; //methods available on the laptop
119 u8 brightness; //brightness level
121 A1x = 0, //A1340D, A1300F
128 L3H, //L3H, L2000E, L5D
133 M2E, //M2400E, L4400L
134 M6N, //M6800N, W3400N
135 M6R, //M6700R, A3000G
137 S1x, //S1300A, but also L1400B and M2400A (L84F)
138 S2x, //S200 (J1 reported), Victor MP-XP7210
141 xxN, //M2400N, M3700N, M5200N, M6800N, S1300N, S5200N
144 } model; //Models currently supported
145 u16 event_count[128]; //count for each event TODO make this better
149 #define A1x_PREFIX "\\_SB.PCI0.ISA.EC0."
150 #define L3C_PREFIX "\\_SB.PCI0.PX40.ECD0."
151 #define M1A_PREFIX "\\_SB.PCI0.PX40.EC0."
152 #define P30_PREFIX "\\_SB.PCI0.LPCB.EC0."
153 #define S1x_PREFIX "\\_SB.PCI0.PX40."
154 #define S2x_PREFIX A1x_PREFIX
155 #define xxN_PREFIX "\\_SB.PCI0.SBRG.EC0."
157 static struct model_data model_conf[END_MODEL] = {
159 * TODO I have seen a SWBX and AIBX method on some models, like L1400B,
160 * it seems to be a kind of switch, but what for ?
166 .mled_status = "\\MAIL",
167 .mt_lcd_switch = A1x_PREFIX "_Q10",
168 .lcd_status = "\\BKLI",
169 .brightness_up = A1x_PREFIX "_Q0E",
170 .brightness_down = A1x_PREFIX "_Q0F"},
176 .wled_status = "\\SG66",
177 .mt_lcd_switch = "\\Q10",
178 .lcd_status = "\\BAOF",
179 .brightness_set = "SPLV",
180 .brightness_get = "GPLV",
181 .display_set = "SDSP",
182 .display_get = "\\INFB"},
187 /* WLED present, but not controlled by ACPI */
188 .mt_lcd_switch = xxN_PREFIX "_Q10",
189 .brightness_set = "SPLV",
190 .brightness_get = "GPLV",
191 .display_set = "SDSP",
192 .display_get = "\\ADVG"},
197 .mt_lcd_switch = "\\Q0D",
198 .lcd_status = "\\GP11",
199 .brightness_up = "\\Q0C",
200 .brightness_down = "\\Q0B",
201 .brightness_status = "\\BLVL",
202 .display_set = "SDSP",
203 .display_get = "\\INFB"},
208 .mled_status = "\\SGP6",
210 .wled_status = "\\RCP3",
211 .mt_lcd_switch = "\\Q10",
212 .lcd_status = "\\SGP0",
213 .brightness_up = "\\Q0E",
214 .brightness_down = "\\Q0F",
215 .display_set = "SDSP",
216 .display_get = "\\INFB"},
222 .mt_lcd_switch = L3C_PREFIX "_Q10",
223 .lcd_status = "\\GL32",
224 .brightness_set = "SPLV",
225 .brightness_get = "GPLV",
226 .display_set = "SDSP",
227 .display_get = "\\_SB.PCI0.PCI1.VGAC.NMAP"},
232 .mled_status = "\\MALD",
234 .mt_lcd_switch = "\\Q10",
235 .lcd_status = "\\BKLG",
236 .brightness_set = "SPLV",
237 .brightness_get = "GPLV",
238 .display_set = "SDSP",
239 .display_get = "\\INFB"},
245 .mt_lcd_switch = "EHK",
246 .lcd_status = "\\_SB.PCI0.PM.PBC",
247 .brightness_set = "SPLV",
248 .brightness_get = "GPLV",
249 .display_set = "SDSP",
250 .display_get = "\\INFB"},
256 .wled_status = "\\_SB.PCI0.SBRG.SG13",
257 .mt_lcd_switch = xxN_PREFIX "_Q10",
258 .lcd_status = "\\_SB.PCI0.SBSM.SEO4",
259 .brightness_set = "SPLV",
260 .brightness_get = "GPLV",
261 .display_set = "SDSP",
262 .display_get = "\\_SB.PCI0.P0P1.VGA.GETD"},
267 /* WLED present, but not controlled by ACPI */
269 .mt_lcd_switch = "\\Q0D",
270 .lcd_status = "\\BAOF",
271 .brightness_set = "SPLV",
272 .brightness_get = "GPLV",
273 .display_set = "SDSP",
274 .display_get = "\\INFB"},
278 /* No features, but at least support the hotkeys */
284 .mt_lcd_switch = M1A_PREFIX "Q10",
285 .lcd_status = "\\PNOF",
286 .brightness_up = M1A_PREFIX "Q0E",
287 .brightness_down = M1A_PREFIX "Q0F",
288 .brightness_status = "\\BRIT",
289 .display_set = "SDSP",
290 .display_get = "\\INFB"},
296 .mt_lcd_switch = "\\Q10",
297 .lcd_status = "\\GP06",
298 .brightness_set = "SPLV",
299 .brightness_get = "GPLV",
300 .display_set = "SDSP",
301 .display_get = "\\INFB"},
307 .wled_status = "\\_SB.PCI0.SBRG.SG13",
308 .mt_lcd_switch = xxN_PREFIX "_Q10",
309 .lcd_status = "\\_SB.BKLT",
310 .brightness_set = "SPLV",
311 .brightness_get = "GPLV",
312 .display_set = "SDSP",
313 .display_get = "\\_SB.PCI0.P0P1.VGA.GETD"},
318 .mt_lcd_switch = xxN_PREFIX "_Q10",
319 .lcd_status = "\\_SB.PCI0.SBSM.SEO4",
320 .brightness_set = "SPLV",
321 .brightness_get = "GPLV",
322 .display_set = "SDSP",
323 .display_get = "\\SSTE"},
328 .mt_lcd_switch = P30_PREFIX "_Q0E",
329 .lcd_status = "\\BKLT",
330 .brightness_up = P30_PREFIX "_Q68",
331 .brightness_down = P30_PREFIX "_Q69",
332 .brightness_get = "GPLV",
333 .display_set = "SDSP",
334 .display_get = "\\DNXT"},
339 .mled_status = "\\EMLE",
341 .mt_lcd_switch = S1x_PREFIX "Q10",
342 .lcd_status = "\\PNOF",
343 .brightness_set = "SPLV",
344 .brightness_get = "GPLV"},
349 .mled_status = "\\MAIL",
350 .mt_lcd_switch = S2x_PREFIX "_Q10",
351 .lcd_status = "\\BKLI",
352 .brightness_up = S2x_PREFIX "_Q0B",
353 .brightness_down = S2x_PREFIX "_Q0A"},
360 .mt_lcd_switch = xxN_PREFIX "_Q10",
361 .lcd_status = "\\BKLT",
362 .brightness_set = "SPLV",
363 .brightness_get = "GPLV",
364 .display_set = "SDSP",
365 .display_get = "\\ADVG"},
369 .mt_bt_switch = "BLED",
371 .mt_lcd_switch = xxN_PREFIX "_Q10",
372 .brightness_set = "SPLV",
373 .brightness_get = "GPLV",
374 .display_set = "SDSP",
375 .display_get = "\\ADVG"},
380 /* WLED present, but not controlled by ACPI */
381 .mt_lcd_switch = xxN_PREFIX "_Q10",
382 .lcd_status = "\\BKLT",
383 .brightness_set = "SPLV",
384 .brightness_get = "GPLV",
385 .display_set = "SDSP",
386 .display_get = "\\ADVG"}
390 static struct proc_dir_entry *asus_proc_dir;
393 * This header is made available to allow proper configuration given model,
394 * revision number , ... this info cannot go in struct asus_hotk because it is
395 * available before the hotk
397 static struct acpi_table_header *asus_info;
399 /* The actual device the driver binds to */
400 static struct asus_hotk *hotk;
403 * The hotkey driver declaration
405 static int asus_hotk_add(struct acpi_device *device);
406 static int asus_hotk_remove(struct acpi_device *device, int type);
407 static struct acpi_driver asus_hotk_driver = {
408 .name = ACPI_HOTK_NAME,
409 .class = ACPI_HOTK_CLASS,
410 .ids = ACPI_HOTK_HID,
412 .add = asus_hotk_add,
413 .remove = asus_hotk_remove,
418 * This function evaluates an ACPI method, given an int as parameter, the
419 * method is searched within the scope of the handle, can be NULL. The output
420 * of the method is written is output, which can also be NULL
422 * returns 1 if write is successful, 0 else.
424 static int write_acpi_int(acpi_handle handle, const char *method, int val,
425 struct acpi_buffer *output)
427 struct acpi_object_list params; //list of input parameters (an int here)
428 union acpi_object in_obj; //the only param we use
432 params.pointer = &in_obj;
433 in_obj.type = ACPI_TYPE_INTEGER;
434 in_obj.integer.value = val;
436 status = acpi_evaluate_object(handle, (char *)method, ¶ms, output);
437 return (status == AE_OK);
440 static int read_acpi_int(acpi_handle handle, const char *method, int *val)
442 struct acpi_buffer output;
443 union acpi_object out_obj;
446 output.length = sizeof(out_obj);
447 output.pointer = &out_obj;
449 status = acpi_evaluate_object(handle, (char *)method, NULL, &output);
450 *val = out_obj.integer.value;
451 return (status == AE_OK) && (out_obj.type == ACPI_TYPE_INTEGER);
455 * We write our info in page, we begin at offset off and cannot write more
456 * than count bytes. We set eof to 1 if we handle those 2 values. We return the
457 * number of bytes written in page
460 proc_read_info(char *page, char **start, off_t off, int count, int *eof,
465 char buf[16]; //enough for all info
467 * We use the easy way, we don't care of off and count, so we don't set eof
471 len += sprintf(page, ACPI_HOTK_NAME " " ASUS_ACPI_VERSION "\n");
472 len += sprintf(page + len, "Model reference : %s\n",
473 hotk->methods->name);
475 * The SFUN method probably allows the original driver to get the list
476 * of features supported by a given model. For now, 0x0100 or 0x0800
477 * bit signifies that the laptop is equipped with a Wi-Fi MiniPCI card.
478 * The significance of others is yet to be found.
480 if (read_acpi_int(hotk->handle, "SFUN", &temp))
482 sprintf(page + len, "SFUN value : 0x%04x\n", temp);
484 * Another value for userspace: the ASYM method returns 0x02 for
485 * battery low and 0x04 for battery critical, its readings tend to be
486 * more accurate than those provided by _BST.
487 * Note: since not all the laptops provide this method, errors are
490 if (read_acpi_int(hotk->handle, "ASYM", &temp))
492 sprintf(page + len, "ASYM value : 0x%04x\n", temp);
494 snprintf(buf, 16, "%d", asus_info->length);
495 len += sprintf(page + len, "DSDT length : %s\n", buf);
496 snprintf(buf, 16, "%d", asus_info->checksum);
497 len += sprintf(page + len, "DSDT checksum : %s\n", buf);
498 snprintf(buf, 16, "%d", asus_info->revision);
499 len += sprintf(page + len, "DSDT revision : %s\n", buf);
500 snprintf(buf, 7, "%s", asus_info->oem_id);
501 len += sprintf(page + len, "OEM id : %s\n", buf);
502 snprintf(buf, 9, "%s", asus_info->oem_table_id);
503 len += sprintf(page + len, "OEM table id : %s\n", buf);
504 snprintf(buf, 16, "%x", asus_info->oem_revision);
505 len += sprintf(page + len, "OEM revision : 0x%s\n", buf);
506 snprintf(buf, 5, "%s", asus_info->asl_compiler_id);
507 len += sprintf(page + len, "ASL comp vendor id : %s\n", buf);
508 snprintf(buf, 16, "%x", asus_info->asl_compiler_revision);
509 len += sprintf(page + len, "ASL comp revision : 0x%s\n", buf);
517 * We write our info in page, we begin at offset off and cannot write more
518 * than count bytes. We set eof to 1 if we handle those 2 values. We return the
519 * number of bytes written in page
522 /* Generic LED functions */
523 static int read_led(const char *ledname, int ledmask)
528 if (read_acpi_int(NULL, ledname, &led_status))
531 printk(KERN_WARNING "Asus ACPI: Error reading LED "
534 return (hotk->status & ledmask) ? 1 : 0;
537 static int parse_arg(const char __user * buf, unsigned long count, int *val)
544 if (copy_from_user(s, buf, count))
547 if (sscanf(s, "%i", val) != 1)
552 /* FIXME: kill extraneous args so it can be called independently */
554 write_led(const char __user * buffer, unsigned long count,
555 char *ledname, int ledmask, int invert)
560 count = parse_arg(buffer, count, &value);
562 led_out = value ? 1 : 0;
565 (led_out) ? (hotk->status | ledmask) : (hotk->status & ~ledmask);
567 if (invert) /* invert target value */
568 led_out = !led_out & 0x1;
570 if (!write_acpi_int(hotk->handle, ledname, led_out, NULL))
571 printk(KERN_WARNING "Asus ACPI: LED (%s) write failed\n",
578 * Proc handlers for MLED
581 proc_read_mled(char *page, char **start, off_t off, int count, int *eof,
584 return sprintf(page, "%d\n",
585 read_led(hotk->methods->mled_status, MLED_ON));
589 proc_write_mled(struct file *file, const char __user * buffer,
590 unsigned long count, void *data)
592 return write_led(buffer, count, hotk->methods->mt_mled, MLED_ON, 1);
596 * Proc handlers for LED display
599 proc_read_ledd(char *page, char **start, off_t off, int count, int *eof,
602 return sprintf(page, "0x%08x\n", hotk->ledd_status);
606 proc_write_ledd(struct file *file, const char __user * buffer,
607 unsigned long count, void *data)
611 count = parse_arg(buffer, count, &value);
614 (hotk->handle, hotk->methods->mt_ledd, value, NULL))
616 "Asus ACPI: LED display write failed\n");
618 hotk->ledd_status = (u32) value;
619 } else if (count < 0)
620 printk(KERN_WARNING "Asus ACPI: Error reading user input\n");
626 * Proc handlers for WLED
629 proc_read_wled(char *page, char **start, off_t off, int count, int *eof,
632 return sprintf(page, "%d\n",
633 read_led(hotk->methods->wled_status, WLED_ON));
637 proc_write_wled(struct file *file, const char __user * buffer,
638 unsigned long count, void *data)
640 return write_led(buffer, count, hotk->methods->mt_wled, WLED_ON, 0);
644 * Proc handlers for Bluetooth
647 proc_read_bluetooth(char *page, char **start, off_t off, int count, int *eof,
650 return sprintf(page, "%d\n", read_led(hotk->methods->bt_status, BT_ON));
654 proc_write_bluetooth(struct file *file, const char __user * buffer,
655 unsigned long count, void *data)
657 /* Note: mt_bt_switch controls both internal Bluetooth adapter's
658 presence and its LED */
659 return write_led(buffer, count, hotk->methods->mt_bt_switch, BT_ON, 0);
663 * Proc handlers for TLED
666 proc_read_tled(char *page, char **start, off_t off, int count, int *eof,
669 return sprintf(page, "%d\n",
670 read_led(hotk->methods->tled_status, TLED_ON));
674 proc_write_tled(struct file *file, const char __user * buffer,
675 unsigned long count, void *data)
677 return write_led(buffer, count, hotk->methods->mt_tled, TLED_ON, 0);
680 static int get_lcd_state(void)
684 if (hotk->model != L3H) {
685 /* We don't have to check anything if we are here */
686 if (!read_acpi_int(NULL, hotk->methods->lcd_status, &lcd))
688 "Asus ACPI: Error reading LCD status\n");
690 if (hotk->model == L2D)
692 } else { /* L3H and the like have to be handled differently */
693 acpi_status status = 0;
694 struct acpi_object_list input;
695 union acpi_object mt_params[2];
696 struct acpi_buffer output;
697 union acpi_object out_obj;
700 input.pointer = mt_params;
701 /* Note: the following values are partly guessed up, but
702 otherwise they seem to work */
703 mt_params[0].type = ACPI_TYPE_INTEGER;
704 mt_params[0].integer.value = 0x02;
705 mt_params[1].type = ACPI_TYPE_INTEGER;
706 mt_params[1].integer.value = 0x02;
708 output.length = sizeof(out_obj);
709 output.pointer = &out_obj;
712 acpi_evaluate_object(NULL, hotk->methods->lcd_status,
716 if (out_obj.type == ACPI_TYPE_INTEGER)
717 /* That's what the AML code does */
718 lcd = out_obj.integer.value >> 8;
724 static int set_lcd_state(int value)
727 acpi_status status = 0;
730 if (lcd != get_lcd_state()) {
732 if (hotk->model != L3H) {
734 acpi_evaluate_object(NULL,
735 hotk->methods->mt_lcd_switch,
737 } else { /* L3H and the like have to be handled differently */
739 (hotk->handle, hotk->methods->mt_lcd_switch, 0x07,
742 /* L3H's AML executes EHK (0x07) upon Fn+F7 keypress,
743 the exact behaviour is simulated here */
745 if (ACPI_FAILURE(status))
746 printk(KERN_WARNING "Asus ACPI: Error switching LCD\n");
753 proc_read_lcd(char *page, char **start, off_t off, int count, int *eof,
756 return sprintf(page, "%d\n", get_lcd_state());
760 proc_write_lcd(struct file *file, const char __user * buffer,
761 unsigned long count, void *data)
765 count = parse_arg(buffer, count, &value);
767 set_lcd_state(value);
771 static int read_brightness(void)
775 if (hotk->methods->brightness_get) { /* SPLV/GPLV laptop */
776 if (!read_acpi_int(hotk->handle, hotk->methods->brightness_get,
779 "Asus ACPI: Error reading brightness\n");
780 } else if (hotk->methods->brightness_status) { /* For D1 for example */
781 if (!read_acpi_int(NULL, hotk->methods->brightness_status,
784 "Asus ACPI: Error reading brightness\n");
785 } else /* No GPLV method */
786 value = hotk->brightness;
791 * Change the brightness level
793 static void set_brightness(int value)
795 acpi_status status = 0;
798 if (hotk->methods->brightness_set) {
799 if (!write_acpi_int(hotk->handle, hotk->methods->brightness_set,
802 "Asus ACPI: Error changing brightness\n");
806 /* No SPLV method if we are here, act as appropriate */
807 value -= read_brightness();
809 status = acpi_evaluate_object(NULL, (value > 0) ?
810 hotk->methods->brightness_up :
811 hotk->methods->brightness_down,
813 (value > 0) ? value-- : value++;
814 if (ACPI_FAILURE(status))
816 "Asus ACPI: Error changing brightness\n");
822 proc_read_brn(char *page, char **start, off_t off, int count, int *eof,
825 return sprintf(page, "%d\n", read_brightness());
829 proc_write_brn(struct file *file, const char __user * buffer,
830 unsigned long count, void *data)
834 count = parse_arg(buffer, count, &value);
836 value = (0 < value) ? ((15 < value) ? 15 : value) : 0;
837 /* 0 <= value <= 15 */
838 set_brightness(value);
839 } else if (count < 0) {
840 printk(KERN_WARNING "Asus ACPI: Error reading user input\n");
846 static void set_display(int value)
848 /* no sanity check needed for now */
849 if (!write_acpi_int(hotk->handle, hotk->methods->display_set,
851 printk(KERN_WARNING "Asus ACPI: Error setting display\n");
856 * Now, *this* one could be more user-friendly, but so far, no-one has
857 * complained. The significance of bits is the same as in proc_write_disp()
860 proc_read_disp(char *page, char **start, off_t off, int count, int *eof,
865 if (!read_acpi_int(hotk->handle, hotk->methods->display_get, &value))
867 "Asus ACPI: Error reading display status\n");
868 value &= 0x07; /* needed for some models, shouldn't hurt others */
869 return sprintf(page, "%d\n", value);
873 * Experimental support for display switching. As of now: 1 should activate
874 * the LCD output, 2 should do for CRT, and 4 for TV-Out. Any combination
875 * (bitwise) of these will suffice. I never actually tested 3 displays hooked up
876 * simultaneously, so be warned. See the acpi4asus README for more info.
879 proc_write_disp(struct file *file, const char __user * buffer,
880 unsigned long count, void *data)
884 count = parse_arg(buffer, count, &value);
888 printk(KERN_WARNING "Asus ACPI: Error reading user input\n");
893 typedef int (proc_readfunc) (char *page, char **start, off_t off, int count,
894 int *eof, void *data);
895 typedef int (proc_writefunc) (struct file * file, const char __user * buffer,
896 unsigned long count, void *data);
899 asus_proc_add(char *name, proc_writefunc * writefunc,
900 proc_readfunc * readfunc, mode_t mode,
901 struct acpi_device *device)
903 struct proc_dir_entry *proc =
904 create_proc_entry(name, mode, acpi_device_dir(device));
906 printk(KERN_WARNING " Unable to create %s fs entry\n", name);
909 proc->write_proc = writefunc;
910 proc->read_proc = readfunc;
911 proc->data = acpi_driver_data(device);
912 proc->owner = THIS_MODULE;
913 proc->uid = asus_uid;
914 proc->gid = asus_gid;
918 static int asus_hotk_add_fs(struct acpi_device *device)
920 struct proc_dir_entry *proc;
924 * If parameter uid or gid is not changed, keep the default setting for
925 * our proc entries (-rw-rw-rw-) else, it means we care about security,
926 * and then set to -rw-rw----
929 if ((asus_uid == 0) && (asus_gid == 0)) {
930 mode = S_IFREG | S_IRUGO | S_IWUGO;
932 mode = S_IFREG | S_IRUSR | S_IRGRP | S_IWUSR | S_IWGRP;
933 printk(KERN_WARNING " asus_uid and asus_gid parameters are "
934 "deprecated, use chown and chmod instead!\n");
937 acpi_device_dir(device) = asus_proc_dir;
938 if (!acpi_device_dir(device))
941 proc = create_proc_entry(PROC_INFO, mode, acpi_device_dir(device));
943 proc->read_proc = proc_read_info;
944 proc->data = acpi_driver_data(device);
945 proc->owner = THIS_MODULE;
946 proc->uid = asus_uid;
947 proc->gid = asus_gid;
949 printk(KERN_WARNING " Unable to create " PROC_INFO
953 if (hotk->methods->mt_wled) {
954 asus_proc_add(PROC_WLED, &proc_write_wled, &proc_read_wled,
958 if (hotk->methods->mt_ledd) {
959 asus_proc_add(PROC_LEDD, &proc_write_ledd, &proc_read_ledd,
963 if (hotk->methods->mt_mled) {
964 asus_proc_add(PROC_MLED, &proc_write_mled, &proc_read_mled,
968 if (hotk->methods->mt_tled) {
969 asus_proc_add(PROC_TLED, &proc_write_tled, &proc_read_tled,
973 if (hotk->methods->mt_bt_switch) {
974 asus_proc_add(PROC_BT, &proc_write_bluetooth,
975 &proc_read_bluetooth, mode, device);
979 * We need both read node and write method as LCD switch is also accessible
982 if (hotk->methods->mt_lcd_switch && hotk->methods->lcd_status) {
983 asus_proc_add(PROC_LCD, &proc_write_lcd, &proc_read_lcd, mode,
987 if ((hotk->methods->brightness_up && hotk->methods->brightness_down) ||
988 (hotk->methods->brightness_get && hotk->methods->brightness_set)) {
989 asus_proc_add(PROC_BRN, &proc_write_brn, &proc_read_brn, mode,
993 if (hotk->methods->display_set) {
994 asus_proc_add(PROC_DISP, &proc_write_disp, &proc_read_disp,
1001 static int asus_hotk_remove_fs(struct acpi_device *device)
1003 if (acpi_device_dir(device)) {
1004 remove_proc_entry(PROC_INFO, acpi_device_dir(device));
1005 if (hotk->methods->mt_wled)
1006 remove_proc_entry(PROC_WLED, acpi_device_dir(device));
1007 if (hotk->methods->mt_mled)
1008 remove_proc_entry(PROC_MLED, acpi_device_dir(device));
1009 if (hotk->methods->mt_tled)
1010 remove_proc_entry(PROC_TLED, acpi_device_dir(device));
1011 if (hotk->methods->mt_ledd)
1012 remove_proc_entry(PROC_LEDD, acpi_device_dir(device));
1013 if (hotk->methods->mt_bt_switch)
1014 remove_proc_entry(PROC_BT, acpi_device_dir(device));
1015 if (hotk->methods->mt_lcd_switch && hotk->methods->lcd_status)
1016 remove_proc_entry(PROC_LCD, acpi_device_dir(device));
1017 if ((hotk->methods->brightness_up
1018 && hotk->methods->brightness_down)
1019 || (hotk->methods->brightness_get
1020 && hotk->methods->brightness_set))
1021 remove_proc_entry(PROC_BRN, acpi_device_dir(device));
1022 if (hotk->methods->display_set)
1023 remove_proc_entry(PROC_DISP, acpi_device_dir(device));
1028 static void asus_hotk_notify(acpi_handle handle, u32 event, void *data)
1030 /* TODO Find a better way to handle events count. */
1034 if ((event & ~((u32) BR_UP)) < 16) {
1035 hotk->brightness = (event & ~((u32) BR_UP));
1036 } else if ((event & ~((u32) BR_DOWN)) < 16) {
1037 hotk->brightness = (event & ~((u32) BR_DOWN));
1040 acpi_bus_generate_event(hotk->device, event,
1041 hotk->event_count[event % 128]++);
1047 * Match the model string to the list of supported models. Return END_MODEL if
1048 * no match or model is NULL.
1050 static int asus_model_match(char *model)
1055 if (strncmp(model, "L3D", 3) == 0)
1057 else if (strncmp(model, "L2E", 3) == 0 ||
1058 strncmp(model, "L3H", 3) == 0 || strncmp(model, "L5D", 3) == 0)
1060 else if (strncmp(model, "L3", 2) == 0 || strncmp(model, "L2B", 3) == 0)
1062 else if (strncmp(model, "L8L", 3) == 0)
1064 else if (strncmp(model, "L4R", 3) == 0)
1066 else if (strncmp(model, "M6N", 3) == 0 || strncmp(model, "W3N", 3) == 0)
1068 else if (strncmp(model, "M6R", 3) == 0 || strncmp(model, "A3G", 3) == 0)
1070 else if (strncmp(model, "M2N", 3) == 0 ||
1071 strncmp(model, "M3N", 3) == 0 ||
1072 strncmp(model, "M5N", 3) == 0 ||
1073 strncmp(model, "M6N", 3) == 0 ||
1074 strncmp(model, "S1N", 3) == 0 ||
1075 strncmp(model, "S5N", 3) == 0 || strncmp(model, "W1N", 3) == 0)
1077 else if (strncmp(model, "M1", 2) == 0)
1079 else if (strncmp(model, "M2", 2) == 0 || strncmp(model, "L4E", 3) == 0)
1081 else if (strncmp(model, "L2", 2) == 0)
1083 else if (strncmp(model, "L8", 2) == 0)
1085 else if (strncmp(model, "D1", 2) == 0)
1087 else if (strncmp(model, "A1", 2) == 0)
1089 else if (strncmp(model, "A2", 2) == 0)
1091 else if (strncmp(model, "J1", 2) == 0)
1093 else if (strncmp(model, "L5", 2) == 0)
1095 else if (strncmp(model, "A4G", 3) == 0)
1097 else if (strncmp(model, "W1N", 3) == 0)
1099 else if (strncmp(model, "W5A", 3) == 0)
1106 * This function is used to initialize the hotk with right values. In this
1107 * method, we can make all the detection we want, and modify the hotk struct
1109 static int asus_hotk_get_info(void)
1111 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
1112 struct acpi_buffer dsdt = { ACPI_ALLOCATE_BUFFER, NULL };
1113 union acpi_object *model = NULL;
1115 char *string = NULL;
1119 * Get DSDT headers early enough to allow for differentiating between
1120 * models, but late enough to allow acpi_bus_register_driver() to fail
1121 * before doing anything ACPI-specific. Should we encounter a machine,
1122 * which needs special handling (i.e. its hotkey device has a different
1123 * HID), this bit will be moved. A global variable asus_info contains
1126 status = acpi_get_table(ACPI_TABLE_ID_DSDT, 1, &dsdt);
1127 if (ACPI_FAILURE(status))
1128 printk(KERN_WARNING " Couldn't get the DSDT table header\n");
1130 asus_info = (struct acpi_table_header *)dsdt.pointer;
1132 /* We have to write 0 on init this far for all ASUS models */
1133 if (!write_acpi_int(hotk->handle, "INIT", 0, &buffer)) {
1134 printk(KERN_ERR " Hotkey initialization failed\n");
1138 /* This needs to be called for some laptops to init properly */
1139 if (!read_acpi_int(hotk->handle, "BSTS", &bsts_result))
1140 printk(KERN_WARNING " Error calling BSTS\n");
1141 else if (bsts_result)
1142 printk(KERN_NOTICE " BSTS called, 0x%02x returned\n",
1146 * Try to match the object returned by INIT to the specific model.
1147 * Handle every possible object (or the lack of thereof) the DSDT
1148 * writers might throw at us. When in trouble, we pass NULL to
1149 * asus_model_match() and try something completely different.
1151 if (buffer.pointer) {
1152 model = (union acpi_object *)buffer.pointer;
1153 switch (model->type) {
1154 case ACPI_TYPE_STRING:
1155 string = model->string.pointer;
1157 case ACPI_TYPE_BUFFER:
1158 string = model->buffer.pointer;
1165 hotk->model = asus_model_match(string);
1166 if (hotk->model == END_MODEL) { /* match failed */
1168 strncmp(asus_info->oem_table_id, "ODEM", 4) == 0) {
1171 " Samsung P30 detected, supported\n");
1174 printk(KERN_NOTICE " unsupported model %s, trying "
1175 "default values\n", string);
1177 " send /proc/acpi/dsdt to the developers\n");
1179 hotk->methods = &model_conf[hotk->model];
1182 hotk->methods = &model_conf[hotk->model];
1183 printk(KERN_NOTICE " %s model detected, supported\n", string);
1185 /* Sort of per-model blacklist */
1186 if (strncmp(string, "L2B", 3) == 0)
1187 hotk->methods->lcd_status = NULL;
1188 /* L2B is similar enough to L3C to use its settings, with this only
1190 else if (strncmp(string, "A3G", 3) == 0)
1191 hotk->methods->lcd_status = "\\BLFG";
1192 /* A3G is like M6R */
1193 else if (strncmp(string, "S5N", 3) == 0 ||
1194 strncmp(string, "M5N", 3) == 0 ||
1195 strncmp(string, "W3N", 3) == 0)
1196 hotk->methods->mt_mled = NULL;
1197 /* S5N, M5N and W3N have no MLED */
1198 else if (strncmp(string, "L5D", 3) == 0)
1199 hotk->methods->mt_wled = NULL;
1200 /* L5D's WLED is not controlled by ACPI */
1201 else if (strncmp(string, "M2N", 3) == 0)
1202 hotk->methods->mt_wled = "WLED";
1203 /* M2N has a usable WLED */
1204 else if (asus_info) {
1205 if (strncmp(asus_info->oem_table_id, "L1", 2) == 0)
1206 hotk->methods->mled_status = NULL;
1207 /* S1300A reports L84F, but L1400B too, account for that */
1215 static int asus_hotk_check(void)
1219 result = acpi_bus_get_status(hotk->device);
1223 if (hotk->device->status.present) {
1224 result = asus_hotk_get_info();
1226 printk(KERN_ERR " Hotkey device not present, aborting\n");
1233 static int asus_hotk_found;
1235 static int asus_hotk_add(struct acpi_device *device)
1237 acpi_status status = AE_OK;
1243 printk(KERN_NOTICE "Asus Laptop ACPI Extras version %s\n",
1247 (struct asus_hotk *)kmalloc(sizeof(struct asus_hotk), GFP_KERNEL);
1250 memset(hotk, 0, sizeof(struct asus_hotk));
1252 hotk->handle = device->handle;
1253 strcpy(acpi_device_name(device), ACPI_HOTK_DEVICE_NAME);
1254 strcpy(acpi_device_class(device), ACPI_HOTK_CLASS);
1255 acpi_driver_data(device) = hotk;
1256 hotk->device = device;
1258 result = asus_hotk_check();
1262 result = asus_hotk_add_fs(device);
1267 * We install the handler, it will receive the hotk in parameter, so, we
1268 * could add other data to the hotk struct
1270 status = acpi_install_notify_handler(hotk->handle, ACPI_SYSTEM_NOTIFY,
1271 asus_hotk_notify, hotk);
1272 if (ACPI_FAILURE(status))
1273 printk(KERN_ERR " Error installing notify handler\n");
1275 /* For laptops without GPLV: init the hotk->brightness value */
1276 if ((!hotk->methods->brightness_get)
1277 && (!hotk->methods->brightness_status)
1278 && (hotk->methods->brightness_up && hotk->methods->brightness_down)) {
1280 acpi_evaluate_object(NULL, hotk->methods->brightness_down,
1282 if (ACPI_FAILURE(status))
1283 printk(KERN_WARNING " Error changing brightness\n");
1286 acpi_evaluate_object(NULL,
1287 hotk->methods->brightness_up,
1289 if (ACPI_FAILURE(status))
1290 printk(KERN_WARNING " Strange, error changing"
1295 asus_hotk_found = 1;
1297 /* LED display is off by default */
1298 hotk->ledd_status = 0xFFF;
1308 static int asus_hotk_remove(struct acpi_device *device, int type)
1310 acpi_status status = 0;
1312 if (!device || !acpi_driver_data(device))
1315 status = acpi_remove_notify_handler(hotk->handle, ACPI_SYSTEM_NOTIFY,
1317 if (ACPI_FAILURE(status))
1318 printk(KERN_ERR "Asus ACPI: Error removing notify handler\n");
1320 asus_hotk_remove_fs(device);
1327 static int __init asus_acpi_init(void)
1334 if (!acpi_specific_hotkey_enabled) {
1335 printk(KERN_ERR "Using generic hotkey driver\n");
1338 asus_proc_dir = proc_mkdir(PROC_ASUS, acpi_root_dir);
1339 if (!asus_proc_dir) {
1340 printk(KERN_ERR "Asus ACPI: Unable to create /proc entry\n");
1343 asus_proc_dir->owner = THIS_MODULE;
1345 result = acpi_bus_register_driver(&asus_hotk_driver);
1347 remove_proc_entry(PROC_ASUS, acpi_root_dir);
1352 * This is a bit of a kludge. We only want this module loaded
1353 * for ASUS systems, but there's currently no way to probe the
1354 * ACPI namespace for ASUS HIDs. So we just return failure if
1355 * we didn't find one, which will cause the module to be
1358 if (!asus_hotk_found) {
1359 acpi_bus_unregister_driver(&asus_hotk_driver);
1360 remove_proc_entry(PROC_ASUS, acpi_root_dir);
1367 static void __exit asus_acpi_exit(void)
1369 acpi_bus_unregister_driver(&asus_hotk_driver);
1370 remove_proc_entry(PROC_ASUS, acpi_root_dir);
1377 module_init(asus_acpi_init);
1378 module_exit(asus_acpi_exit);