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 = "\\SSTE"},
319 .mt_lcd_switch = xxN_PREFIX "_Q10",
320 .lcd_status = "\\_SB.PCI0.SBSM.SEO4",
321 .brightness_set = "SPLV",
322 .brightness_get = "GPLV",
323 .display_set = "SDSP",
324 .display_get = "\\_SB.PCI0.P0P1.VGA.GETD"},
329 .mt_lcd_switch = P30_PREFIX "_Q0E",
330 .lcd_status = "\\BKLT",
331 .brightness_up = P30_PREFIX "_Q68",
332 .brightness_down = P30_PREFIX "_Q69",
333 .brightness_get = "GPLV",
334 .display_set = "SDSP",
335 .display_get = "\\DNXT"},
340 .mled_status = "\\EMLE",
342 .mt_lcd_switch = S1x_PREFIX "Q10",
343 .lcd_status = "\\PNOF",
344 .brightness_set = "SPLV",
345 .brightness_get = "GPLV"},
350 .mled_status = "\\MAIL",
351 .mt_lcd_switch = S2x_PREFIX "_Q10",
352 .lcd_status = "\\BKLI",
353 .brightness_up = S2x_PREFIX "_Q0B",
354 .brightness_down = S2x_PREFIX "_Q0A"},
361 .mt_lcd_switch = xxN_PREFIX "_Q10",
362 .lcd_status = "\\BKLT",
363 .brightness_set = "SPLV",
364 .brightness_get = "GPLV",
365 .display_set = "SDSP",
366 .display_get = "\\ADVG"},
370 .mt_bt_switch = "BLED",
372 .mt_lcd_switch = xxN_PREFIX "_Q10",
373 .brightness_set = "SPLV",
374 .brightness_get = "GPLV",
375 .display_set = "SDSP",
376 .display_get = "\\ADVG"},
381 /* WLED present, but not controlled by ACPI */
382 .mt_lcd_switch = xxN_PREFIX "_Q10",
383 .lcd_status = "\\BKLT",
384 .brightness_set = "SPLV",
385 .brightness_get = "GPLV",
386 .display_set = "SDSP",
387 .display_get = "\\ADVG"}
391 static struct proc_dir_entry *asus_proc_dir;
394 * This header is made available to allow proper configuration given model,
395 * revision number , ... this info cannot go in struct asus_hotk because it is
396 * available before the hotk
398 static struct acpi_table_header *asus_info;
400 /* The actual device the driver binds to */
401 static struct asus_hotk *hotk;
404 * The hotkey driver declaration
406 static int asus_hotk_add(struct acpi_device *device);
407 static int asus_hotk_remove(struct acpi_device *device, int type);
408 static struct acpi_driver asus_hotk_driver = {
409 .name = ACPI_HOTK_NAME,
410 .class = ACPI_HOTK_CLASS,
411 .ids = ACPI_HOTK_HID,
413 .add = asus_hotk_add,
414 .remove = asus_hotk_remove,
419 * This function evaluates an ACPI method, given an int as parameter, the
420 * method is searched within the scope of the handle, can be NULL. The output
421 * of the method is written is output, which can also be NULL
423 * returns 1 if write is successful, 0 else.
425 static int write_acpi_int(acpi_handle handle, const char *method, int val,
426 struct acpi_buffer *output)
428 struct acpi_object_list params; //list of input parameters (an int here)
429 union acpi_object in_obj; //the only param we use
433 params.pointer = &in_obj;
434 in_obj.type = ACPI_TYPE_INTEGER;
435 in_obj.integer.value = val;
437 status = acpi_evaluate_object(handle, (char *)method, ¶ms, output);
438 return (status == AE_OK);
441 static int read_acpi_int(acpi_handle handle, const char *method, int *val)
443 struct acpi_buffer output;
444 union acpi_object out_obj;
447 output.length = sizeof(out_obj);
448 output.pointer = &out_obj;
450 status = acpi_evaluate_object(handle, (char *)method, NULL, &output);
451 *val = out_obj.integer.value;
452 return (status == AE_OK) && (out_obj.type == ACPI_TYPE_INTEGER);
456 * We write our info in page, we begin at offset off and cannot write more
457 * than count bytes. We set eof to 1 if we handle those 2 values. We return the
458 * number of bytes written in page
461 proc_read_info(char *page, char **start, off_t off, int count, int *eof,
466 char buf[16]; //enough for all info
468 * We use the easy way, we don't care of off and count, so we don't set eof
472 len += sprintf(page, ACPI_HOTK_NAME " " ASUS_ACPI_VERSION "\n");
473 len += sprintf(page + len, "Model reference : %s\n",
474 hotk->methods->name);
476 * The SFUN method probably allows the original driver to get the list
477 * of features supported by a given model. For now, 0x0100 or 0x0800
478 * bit signifies that the laptop is equipped with a Wi-Fi MiniPCI card.
479 * The significance of others is yet to be found.
481 if (read_acpi_int(hotk->handle, "SFUN", &temp))
483 sprintf(page + len, "SFUN value : 0x%04x\n", temp);
485 * Another value for userspace: the ASYM method returns 0x02 for
486 * battery low and 0x04 for battery critical, its readings tend to be
487 * more accurate than those provided by _BST.
488 * Note: since not all the laptops provide this method, errors are
491 if (read_acpi_int(hotk->handle, "ASYM", &temp))
493 sprintf(page + len, "ASYM value : 0x%04x\n", temp);
495 snprintf(buf, 16, "%d", asus_info->length);
496 len += sprintf(page + len, "DSDT length : %s\n", buf);
497 snprintf(buf, 16, "%d", asus_info->checksum);
498 len += sprintf(page + len, "DSDT checksum : %s\n", buf);
499 snprintf(buf, 16, "%d", asus_info->revision);
500 len += sprintf(page + len, "DSDT revision : %s\n", buf);
501 snprintf(buf, 7, "%s", asus_info->oem_id);
502 len += sprintf(page + len, "OEM id : %s\n", buf);
503 snprintf(buf, 9, "%s", asus_info->oem_table_id);
504 len += sprintf(page + len, "OEM table id : %s\n", buf);
505 snprintf(buf, 16, "%x", asus_info->oem_revision);
506 len += sprintf(page + len, "OEM revision : 0x%s\n", buf);
507 snprintf(buf, 5, "%s", asus_info->asl_compiler_id);
508 len += sprintf(page + len, "ASL comp vendor id : %s\n", buf);
509 snprintf(buf, 16, "%x", asus_info->asl_compiler_revision);
510 len += sprintf(page + len, "ASL comp revision : 0x%s\n", buf);
518 * We write our info in page, we begin at offset off and cannot write more
519 * than count bytes. We set eof to 1 if we handle those 2 values. We return the
520 * number of bytes written in page
523 /* Generic LED functions */
524 static int read_led(const char *ledname, int ledmask)
529 if (read_acpi_int(NULL, ledname, &led_status))
532 printk(KERN_WARNING "Asus ACPI: Error reading LED "
535 return (hotk->status & ledmask) ? 1 : 0;
538 static int parse_arg(const char __user * buf, unsigned long count, int *val)
545 if (copy_from_user(s, buf, count))
548 if (sscanf(s, "%i", val) != 1)
553 /* FIXME: kill extraneous args so it can be called independently */
555 write_led(const char __user * buffer, unsigned long count,
556 char *ledname, int ledmask, int invert)
561 count = parse_arg(buffer, count, &value);
563 led_out = value ? 1 : 0;
566 (led_out) ? (hotk->status | ledmask) : (hotk->status & ~ledmask);
568 if (invert) /* invert target value */
569 led_out = !led_out & 0x1;
571 if (!write_acpi_int(hotk->handle, ledname, led_out, NULL))
572 printk(KERN_WARNING "Asus ACPI: LED (%s) write failed\n",
579 * Proc handlers for MLED
582 proc_read_mled(char *page, char **start, off_t off, int count, int *eof,
585 return sprintf(page, "%d\n",
586 read_led(hotk->methods->mled_status, MLED_ON));
590 proc_write_mled(struct file *file, const char __user * buffer,
591 unsigned long count, void *data)
593 return write_led(buffer, count, hotk->methods->mt_mled, MLED_ON, 1);
597 * Proc handlers for LED display
600 proc_read_ledd(char *page, char **start, off_t off, int count, int *eof,
603 return sprintf(page, "0x%08x\n", hotk->ledd_status);
607 proc_write_ledd(struct file *file, const char __user * buffer,
608 unsigned long count, void *data)
612 count = parse_arg(buffer, count, &value);
615 (hotk->handle, hotk->methods->mt_ledd, value, NULL))
617 "Asus ACPI: LED display write failed\n");
619 hotk->ledd_status = (u32) value;
620 } else if (count < 0)
621 printk(KERN_WARNING "Asus ACPI: Error reading user input\n");
627 * Proc handlers for WLED
630 proc_read_wled(char *page, char **start, off_t off, int count, int *eof,
633 return sprintf(page, "%d\n",
634 read_led(hotk->methods->wled_status, WLED_ON));
638 proc_write_wled(struct file *file, const char __user * buffer,
639 unsigned long count, void *data)
641 return write_led(buffer, count, hotk->methods->mt_wled, WLED_ON, 0);
645 * Proc handlers for Bluetooth
648 proc_read_bluetooth(char *page, char **start, off_t off, int count, int *eof,
651 return sprintf(page, "%d\n", read_led(hotk->methods->bt_status, BT_ON));
655 proc_write_bluetooth(struct file *file, const char __user * buffer,
656 unsigned long count, void *data)
658 /* Note: mt_bt_switch controls both internal Bluetooth adapter's
659 presence and its LED */
660 return write_led(buffer, count, hotk->methods->mt_bt_switch, BT_ON, 0);
664 * Proc handlers for TLED
667 proc_read_tled(char *page, char **start, off_t off, int count, int *eof,
670 return sprintf(page, "%d\n",
671 read_led(hotk->methods->tled_status, TLED_ON));
675 proc_write_tled(struct file *file, const char __user * buffer,
676 unsigned long count, void *data)
678 return write_led(buffer, count, hotk->methods->mt_tled, TLED_ON, 0);
681 static int get_lcd_state(void)
685 if (hotk->model != L3H) {
686 /* We don't have to check anything if we are here */
687 if (!read_acpi_int(NULL, hotk->methods->lcd_status, &lcd))
689 "Asus ACPI: Error reading LCD status\n");
691 if (hotk->model == L2D)
693 } else { /* L3H and the like have to be handled differently */
694 acpi_status status = 0;
695 struct acpi_object_list input;
696 union acpi_object mt_params[2];
697 struct acpi_buffer output;
698 union acpi_object out_obj;
701 input.pointer = mt_params;
702 /* Note: the following values are partly guessed up, but
703 otherwise they seem to work */
704 mt_params[0].type = ACPI_TYPE_INTEGER;
705 mt_params[0].integer.value = 0x02;
706 mt_params[1].type = ACPI_TYPE_INTEGER;
707 mt_params[1].integer.value = 0x02;
709 output.length = sizeof(out_obj);
710 output.pointer = &out_obj;
713 acpi_evaluate_object(NULL, hotk->methods->lcd_status,
717 if (out_obj.type == ACPI_TYPE_INTEGER)
718 /* That's what the AML code does */
719 lcd = out_obj.integer.value >> 8;
725 static int set_lcd_state(int value)
728 acpi_status status = 0;
731 if (lcd != get_lcd_state()) {
733 if (hotk->model != L3H) {
735 acpi_evaluate_object(NULL,
736 hotk->methods->mt_lcd_switch,
738 } else { /* L3H and the like have to be handled differently */
740 (hotk->handle, hotk->methods->mt_lcd_switch, 0x07,
743 /* L3H's AML executes EHK (0x07) upon Fn+F7 keypress,
744 the exact behaviour is simulated here */
746 if (ACPI_FAILURE(status))
747 printk(KERN_WARNING "Asus ACPI: Error switching LCD\n");
754 proc_read_lcd(char *page, char **start, off_t off, int count, int *eof,
757 return sprintf(page, "%d\n", get_lcd_state());
761 proc_write_lcd(struct file *file, const char __user * buffer,
762 unsigned long count, void *data)
766 count = parse_arg(buffer, count, &value);
768 set_lcd_state(value);
772 static int read_brightness(void)
776 if (hotk->methods->brightness_get) { /* SPLV/GPLV laptop */
777 if (!read_acpi_int(hotk->handle, hotk->methods->brightness_get,
780 "Asus ACPI: Error reading brightness\n");
781 } else if (hotk->methods->brightness_status) { /* For D1 for example */
782 if (!read_acpi_int(NULL, hotk->methods->brightness_status,
785 "Asus ACPI: Error reading brightness\n");
786 } else /* No GPLV method */
787 value = hotk->brightness;
792 * Change the brightness level
794 static void set_brightness(int value)
796 acpi_status status = 0;
799 if (hotk->methods->brightness_set) {
800 if (!write_acpi_int(hotk->handle, hotk->methods->brightness_set,
803 "Asus ACPI: Error changing brightness\n");
807 /* No SPLV method if we are here, act as appropriate */
808 value -= read_brightness();
810 status = acpi_evaluate_object(NULL, (value > 0) ?
811 hotk->methods->brightness_up :
812 hotk->methods->brightness_down,
814 (value > 0) ? value-- : value++;
815 if (ACPI_FAILURE(status))
817 "Asus ACPI: Error changing brightness\n");
823 proc_read_brn(char *page, char **start, off_t off, int count, int *eof,
826 return sprintf(page, "%d\n", read_brightness());
830 proc_write_brn(struct file *file, const char __user * buffer,
831 unsigned long count, void *data)
835 count = parse_arg(buffer, count, &value);
837 value = (0 < value) ? ((15 < value) ? 15 : value) : 0;
838 /* 0 <= value <= 15 */
839 set_brightness(value);
840 } else if (count < 0) {
841 printk(KERN_WARNING "Asus ACPI: Error reading user input\n");
847 static void set_display(int value)
849 /* no sanity check needed for now */
850 if (!write_acpi_int(hotk->handle, hotk->methods->display_set,
852 printk(KERN_WARNING "Asus ACPI: Error setting display\n");
857 * Now, *this* one could be more user-friendly, but so far, no-one has
858 * complained. The significance of bits is the same as in proc_write_disp()
861 proc_read_disp(char *page, char **start, off_t off, int count, int *eof,
866 if (!read_acpi_int(hotk->handle, hotk->methods->display_get, &value))
868 "Asus ACPI: Error reading display status\n");
869 value &= 0x07; /* needed for some models, shouldn't hurt others */
870 return sprintf(page, "%d\n", value);
874 * Experimental support for display switching. As of now: 1 should activate
875 * the LCD output, 2 should do for CRT, and 4 for TV-Out. Any combination
876 * (bitwise) of these will suffice. I never actually tested 3 displays hooked up
877 * simultaneously, so be warned. See the acpi4asus README for more info.
880 proc_write_disp(struct file *file, const char __user * buffer,
881 unsigned long count, void *data)
885 count = parse_arg(buffer, count, &value);
889 printk(KERN_WARNING "Asus ACPI: Error reading user input\n");
894 typedef int (proc_readfunc) (char *page, char **start, off_t off, int count,
895 int *eof, void *data);
896 typedef int (proc_writefunc) (struct file * file, const char __user * buffer,
897 unsigned long count, void *data);
900 asus_proc_add(char *name, proc_writefunc * writefunc,
901 proc_readfunc * readfunc, mode_t mode,
902 struct acpi_device *device)
904 struct proc_dir_entry *proc =
905 create_proc_entry(name, mode, acpi_device_dir(device));
907 printk(KERN_WARNING " Unable to create %s fs entry\n", name);
910 proc->write_proc = writefunc;
911 proc->read_proc = readfunc;
912 proc->data = acpi_driver_data(device);
913 proc->owner = THIS_MODULE;
914 proc->uid = asus_uid;
915 proc->gid = asus_gid;
919 static int asus_hotk_add_fs(struct acpi_device *device)
921 struct proc_dir_entry *proc;
925 * If parameter uid or gid is not changed, keep the default setting for
926 * our proc entries (-rw-rw-rw-) else, it means we care about security,
927 * and then set to -rw-rw----
930 if ((asus_uid == 0) && (asus_gid == 0)) {
931 mode = S_IFREG | S_IRUGO | S_IWUGO;
933 mode = S_IFREG | S_IRUSR | S_IRGRP | S_IWUSR | S_IWGRP;
934 printk(KERN_WARNING " asus_uid and asus_gid parameters are "
935 "deprecated, use chown and chmod instead!\n");
938 acpi_device_dir(device) = asus_proc_dir;
939 if (!acpi_device_dir(device))
942 proc = create_proc_entry(PROC_INFO, mode, acpi_device_dir(device));
944 proc->read_proc = proc_read_info;
945 proc->data = acpi_driver_data(device);
946 proc->owner = THIS_MODULE;
947 proc->uid = asus_uid;
948 proc->gid = asus_gid;
950 printk(KERN_WARNING " Unable to create " PROC_INFO
954 if (hotk->methods->mt_wled) {
955 asus_proc_add(PROC_WLED, &proc_write_wled, &proc_read_wled,
959 if (hotk->methods->mt_ledd) {
960 asus_proc_add(PROC_LEDD, &proc_write_ledd, &proc_read_ledd,
964 if (hotk->methods->mt_mled) {
965 asus_proc_add(PROC_MLED, &proc_write_mled, &proc_read_mled,
969 if (hotk->methods->mt_tled) {
970 asus_proc_add(PROC_TLED, &proc_write_tled, &proc_read_tled,
974 if (hotk->methods->mt_bt_switch) {
975 asus_proc_add(PROC_BT, &proc_write_bluetooth,
976 &proc_read_bluetooth, mode, device);
980 * We need both read node and write method as LCD switch is also accessible
983 if (hotk->methods->mt_lcd_switch && hotk->methods->lcd_status) {
984 asus_proc_add(PROC_LCD, &proc_write_lcd, &proc_read_lcd, mode,
988 if ((hotk->methods->brightness_up && hotk->methods->brightness_down) ||
989 (hotk->methods->brightness_get && hotk->methods->brightness_set)) {
990 asus_proc_add(PROC_BRN, &proc_write_brn, &proc_read_brn, mode,
994 if (hotk->methods->display_set) {
995 asus_proc_add(PROC_DISP, &proc_write_disp, &proc_read_disp,
1002 static int asus_hotk_remove_fs(struct acpi_device *device)
1004 if (acpi_device_dir(device)) {
1005 remove_proc_entry(PROC_INFO, acpi_device_dir(device));
1006 if (hotk->methods->mt_wled)
1007 remove_proc_entry(PROC_WLED, acpi_device_dir(device));
1008 if (hotk->methods->mt_mled)
1009 remove_proc_entry(PROC_MLED, acpi_device_dir(device));
1010 if (hotk->methods->mt_tled)
1011 remove_proc_entry(PROC_TLED, acpi_device_dir(device));
1012 if (hotk->methods->mt_ledd)
1013 remove_proc_entry(PROC_LEDD, acpi_device_dir(device));
1014 if (hotk->methods->mt_bt_switch)
1015 remove_proc_entry(PROC_BT, acpi_device_dir(device));
1016 if (hotk->methods->mt_lcd_switch && hotk->methods->lcd_status)
1017 remove_proc_entry(PROC_LCD, acpi_device_dir(device));
1018 if ((hotk->methods->brightness_up
1019 && hotk->methods->brightness_down)
1020 || (hotk->methods->brightness_get
1021 && hotk->methods->brightness_set))
1022 remove_proc_entry(PROC_BRN, acpi_device_dir(device));
1023 if (hotk->methods->display_set)
1024 remove_proc_entry(PROC_DISP, acpi_device_dir(device));
1029 static void asus_hotk_notify(acpi_handle handle, u32 event, void *data)
1031 /* TODO Find a better way to handle events count. */
1035 if ((event & ~((u32) BR_UP)) < 16) {
1036 hotk->brightness = (event & ~((u32) BR_UP));
1037 } else if ((event & ~((u32) BR_DOWN)) < 16) {
1038 hotk->brightness = (event & ~((u32) BR_DOWN));
1041 acpi_bus_generate_event(hotk->device, event,
1042 hotk->event_count[event % 128]++);
1048 * Match the model string to the list of supported models. Return END_MODEL if
1049 * no match or model is NULL.
1051 static int asus_model_match(char *model)
1056 if (strncmp(model, "L3D", 3) == 0)
1058 else if (strncmp(model, "L2E", 3) == 0 ||
1059 strncmp(model, "L3H", 3) == 0 || strncmp(model, "L5D", 3) == 0)
1061 else if (strncmp(model, "L3", 2) == 0 || strncmp(model, "L2B", 3) == 0)
1063 else if (strncmp(model, "L8L", 3) == 0)
1065 else if (strncmp(model, "L4R", 3) == 0)
1067 else if (strncmp(model, "M6N", 3) == 0 || strncmp(model, "W3N", 3) == 0)
1069 else if (strncmp(model, "M6R", 3) == 0 || strncmp(model, "A3G", 3) == 0)
1071 else if (strncmp(model, "M2N", 3) == 0 ||
1072 strncmp(model, "M3N", 3) == 0 ||
1073 strncmp(model, "M5N", 3) == 0 ||
1074 strncmp(model, "M6N", 3) == 0 ||
1075 strncmp(model, "S1N", 3) == 0 ||
1076 strncmp(model, "S5N", 3) == 0 || strncmp(model, "W1N", 3) == 0)
1078 else if (strncmp(model, "M1", 2) == 0)
1080 else if (strncmp(model, "M2", 2) == 0 || strncmp(model, "L4E", 3) == 0)
1082 else if (strncmp(model, "L2", 2) == 0)
1084 else if (strncmp(model, "L8", 2) == 0)
1086 else if (strncmp(model, "D1", 2) == 0)
1088 else if (strncmp(model, "A1", 2) == 0)
1090 else if (strncmp(model, "A2", 2) == 0)
1092 else if (strncmp(model, "J1", 2) == 0)
1094 else if (strncmp(model, "L5", 2) == 0)
1096 else if (strncmp(model, "A4G", 3) == 0)
1098 else if (strncmp(model, "W1N", 3) == 0)
1100 else if (strncmp(model, "W5A", 3) == 0)
1107 * This function is used to initialize the hotk with right values. In this
1108 * method, we can make all the detection we want, and modify the hotk struct
1110 static int asus_hotk_get_info(void)
1112 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
1113 struct acpi_buffer dsdt = { ACPI_ALLOCATE_BUFFER, NULL };
1114 union acpi_object *model = NULL;
1116 char *string = NULL;
1120 * Get DSDT headers early enough to allow for differentiating between
1121 * models, but late enough to allow acpi_bus_register_driver() to fail
1122 * before doing anything ACPI-specific. Should we encounter a machine,
1123 * which needs special handling (i.e. its hotkey device has a different
1124 * HID), this bit will be moved. A global variable asus_info contains
1127 status = acpi_get_table(ACPI_TABLE_ID_DSDT, 1, &dsdt);
1128 if (ACPI_FAILURE(status))
1129 printk(KERN_WARNING " Couldn't get the DSDT table header\n");
1131 asus_info = (struct acpi_table_header *)dsdt.pointer;
1133 /* We have to write 0 on init this far for all ASUS models */
1134 if (!write_acpi_int(hotk->handle, "INIT", 0, &buffer)) {
1135 printk(KERN_ERR " Hotkey initialization failed\n");
1139 /* This needs to be called for some laptops to init properly */
1140 if (!read_acpi_int(hotk->handle, "BSTS", &bsts_result))
1141 printk(KERN_WARNING " Error calling BSTS\n");
1142 else if (bsts_result)
1143 printk(KERN_NOTICE " BSTS called, 0x%02x returned\n",
1147 * Try to match the object returned by INIT to the specific model.
1148 * Handle every possible object (or the lack of thereof) the DSDT
1149 * writers might throw at us. When in trouble, we pass NULL to
1150 * asus_model_match() and try something completely different.
1152 if (buffer.pointer) {
1153 model = (union acpi_object *)buffer.pointer;
1154 switch (model->type) {
1155 case ACPI_TYPE_STRING:
1156 string = model->string.pointer;
1158 case ACPI_TYPE_BUFFER:
1159 string = model->buffer.pointer;
1166 hotk->model = asus_model_match(string);
1167 if (hotk->model == END_MODEL) { /* match failed */
1169 strncmp(asus_info->oem_table_id, "ODEM", 4) == 0) {
1172 " Samsung P30 detected, supported\n");
1175 printk(KERN_NOTICE " unsupported model %s, trying "
1176 "default values\n", string);
1178 " send /proc/acpi/dsdt to the developers\n");
1180 hotk->methods = &model_conf[hotk->model];
1183 hotk->methods = &model_conf[hotk->model];
1184 printk(KERN_NOTICE " %s model detected, supported\n", string);
1186 /* Sort of per-model blacklist */
1187 if (strncmp(string, "L2B", 3) == 0)
1188 hotk->methods->lcd_status = NULL;
1189 /* L2B is similar enough to L3C to use its settings, with this only
1191 else if (strncmp(string, "A3G", 3) == 0)
1192 hotk->methods->lcd_status = "\\BLFG";
1193 /* A3G is like M6R */
1194 else if (strncmp(string, "S5N", 3) == 0 ||
1195 strncmp(string, "M5N", 3) == 0 ||
1196 strncmp(string, "W3N", 3) == 0)
1197 hotk->methods->mt_mled = NULL;
1198 /* S5N, M5N and W3N have no MLED */
1199 else if (strncmp(string, "L5D", 3) == 0)
1200 hotk->methods->mt_wled = NULL;
1201 /* L5D's WLED is not controlled by ACPI */
1202 else if (strncmp(string, "M2N", 3) == 0 ||
1203 strncmp(string, "S1N", 3) == 0)
1204 hotk->methods->mt_wled = "WLED";
1205 /* M2N and S1N have a usable WLED */
1206 else if (asus_info) {
1207 if (strncmp(asus_info->oem_table_id, "L1", 2) == 0)
1208 hotk->methods->mled_status = NULL;
1209 /* S1300A reports L84F, but L1400B too, account for that */
1217 static int asus_hotk_check(void)
1221 result = acpi_bus_get_status(hotk->device);
1225 if (hotk->device->status.present) {
1226 result = asus_hotk_get_info();
1228 printk(KERN_ERR " Hotkey device not present, aborting\n");
1235 static int asus_hotk_found;
1237 static int asus_hotk_add(struct acpi_device *device)
1239 acpi_status status = AE_OK;
1245 printk(KERN_NOTICE "Asus Laptop ACPI Extras version %s\n",
1249 (struct asus_hotk *)kmalloc(sizeof(struct asus_hotk), GFP_KERNEL);
1252 memset(hotk, 0, sizeof(struct asus_hotk));
1254 hotk->handle = device->handle;
1255 strcpy(acpi_device_name(device), ACPI_HOTK_DEVICE_NAME);
1256 strcpy(acpi_device_class(device), ACPI_HOTK_CLASS);
1257 acpi_driver_data(device) = hotk;
1258 hotk->device = device;
1260 result = asus_hotk_check();
1264 result = asus_hotk_add_fs(device);
1269 * We install the handler, it will receive the hotk in parameter, so, we
1270 * could add other data to the hotk struct
1272 status = acpi_install_notify_handler(hotk->handle, ACPI_SYSTEM_NOTIFY,
1273 asus_hotk_notify, hotk);
1274 if (ACPI_FAILURE(status))
1275 printk(KERN_ERR " Error installing notify handler\n");
1277 /* For laptops without GPLV: init the hotk->brightness value */
1278 if ((!hotk->methods->brightness_get)
1279 && (!hotk->methods->brightness_status)
1280 && (hotk->methods->brightness_up && hotk->methods->brightness_down)) {
1282 acpi_evaluate_object(NULL, hotk->methods->brightness_down,
1284 if (ACPI_FAILURE(status))
1285 printk(KERN_WARNING " Error changing brightness\n");
1288 acpi_evaluate_object(NULL,
1289 hotk->methods->brightness_up,
1291 if (ACPI_FAILURE(status))
1292 printk(KERN_WARNING " Strange, error changing"
1297 asus_hotk_found = 1;
1299 /* LED display is off by default */
1300 hotk->ledd_status = 0xFFF;
1310 static int asus_hotk_remove(struct acpi_device *device, int type)
1312 acpi_status status = 0;
1314 if (!device || !acpi_driver_data(device))
1317 status = acpi_remove_notify_handler(hotk->handle, ACPI_SYSTEM_NOTIFY,
1319 if (ACPI_FAILURE(status))
1320 printk(KERN_ERR "Asus ACPI: Error removing notify handler\n");
1322 asus_hotk_remove_fs(device);
1329 static int __init asus_acpi_init(void)
1336 if (!acpi_specific_hotkey_enabled) {
1337 printk(KERN_ERR "Using generic hotkey driver\n");
1340 asus_proc_dir = proc_mkdir(PROC_ASUS, acpi_root_dir);
1341 if (!asus_proc_dir) {
1342 printk(KERN_ERR "Asus ACPI: Unable to create /proc entry\n");
1345 asus_proc_dir->owner = THIS_MODULE;
1347 result = acpi_bus_register_driver(&asus_hotk_driver);
1349 remove_proc_entry(PROC_ASUS, acpi_root_dir);
1354 * This is a bit of a kludge. We only want this module loaded
1355 * for ASUS systems, but there's currently no way to probe the
1356 * ACPI namespace for ASUS HIDs. So we just return failure if
1357 * we didn't find one, which will cause the module to be
1360 if (!asus_hotk_found) {
1361 acpi_bus_unregister_driver(&asus_hotk_driver);
1362 remove_proc_entry(PROC_ASUS, acpi_root_dir);
1369 static void __exit asus_acpi_exit(void)
1371 acpi_bus_unregister_driver(&asus_hotk_driver);
1372 remove_proc_entry(PROC_ASUS, acpi_root_dir);
1379 module_init(asus_acpi_init);
1380 module_exit(asus_acpi_exit);