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 * �ic 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 <linux/backlight.h>
39 #include <acpi/acpi_drivers.h>
40 #include <acpi/acpi_bus.h>
41 #include <asm/uaccess.h>
43 #define ASUS_ACPI_VERSION "0.30"
45 #define PROC_ASUS "asus" /* The directory */
46 #define PROC_MLED "mled"
47 #define PROC_WLED "wled"
48 #define PROC_TLED "tled"
49 #define PROC_BT "bluetooth"
50 #define PROC_LEDD "ledd"
51 #define PROC_INFO "info"
52 #define PROC_LCD "lcd"
53 #define PROC_BRN "brn"
54 #define PROC_DISP "disp"
56 #define ACPI_HOTK_NAME "Asus Laptop ACPI Extras Driver"
57 #define ACPI_HOTK_CLASS "hotkey"
58 #define ACPI_HOTK_DEVICE_NAME "Hotkey"
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");
82 module_param(asus_gid
, uint
, 0);
83 MODULE_PARM_DESC(asus_gid
, "GID for entries in /proc/acpi/asus");
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
; /* method to set brightness down ____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 */
136 P30
, /* Samsung P30 */
137 S1x
, /* S1300A, but also L1400B and M2400A (L84F) */
138 S2x
, /* S200 (J1 reported), Victor MP-XP7210 */
142 xxN
, /* M2400N, M3700N, M5200N, M6800N,
145 F3Sa
, /* (Centrino) */
148 } model
; /* Models currently supported */
149 u16 event_count
[128]; /* Count for each event TODO make this better */
153 #define A1x_PREFIX "\\_SB.PCI0.ISA.EC0."
154 #define L3C_PREFIX "\\_SB.PCI0.PX40.ECD0."
155 #define M1A_PREFIX "\\_SB.PCI0.PX40.EC0."
156 #define P30_PREFIX "\\_SB.PCI0.LPCB.EC0."
157 #define S1x_PREFIX "\\_SB.PCI0.PX40."
158 #define S2x_PREFIX A1x_PREFIX
159 #define xxN_PREFIX "\\_SB.PCI0.SBRG.EC0."
161 static struct model_data model_conf
[END_MODEL
] = {
163 * TODO I have seen a SWBX and AIBX method on some models, like L1400B,
164 * it seems to be a kind of switch, but what for ?
170 .mled_status
= "\\MAIL",
171 .mt_lcd_switch
= A1x_PREFIX
"_Q10",
172 .lcd_status
= "\\BKLI",
173 .brightness_up
= A1x_PREFIX
"_Q0E",
174 .brightness_down
= A1x_PREFIX
"_Q0F"},
180 .wled_status
= "\\SG66",
181 .mt_lcd_switch
= "\\Q10",
182 .lcd_status
= "\\BAOF",
183 .brightness_set
= "SPLV",
184 .brightness_get
= "GPLV",
185 .display_set
= "SDSP",
186 .display_get
= "\\INFB"},
191 /* WLED present, but not controlled by ACPI */
192 .mt_lcd_switch
= xxN_PREFIX
"_Q10",
193 .brightness_set
= "SPLV",
194 .brightness_get
= "GPLV",
195 .display_set
= "SDSP",
196 .display_get
= "\\ADVG"},
201 .mt_lcd_switch
= "\\Q0D",
202 .lcd_status
= "\\GP11",
203 .brightness_up
= "\\Q0C",
204 .brightness_down
= "\\Q0B",
205 .brightness_status
= "\\BLVL",
206 .display_set
= "SDSP",
207 .display_get
= "\\INFB"},
212 .mled_status
= "\\SGP6",
214 .wled_status
= "\\RCP3",
215 .mt_lcd_switch
= "\\Q10",
216 .lcd_status
= "\\SGP0",
217 .brightness_up
= "\\Q0E",
218 .brightness_down
= "\\Q0F",
219 .display_set
= "SDSP",
220 .display_get
= "\\INFB"},
226 .mt_lcd_switch
= L3C_PREFIX
"_Q10",
227 .lcd_status
= "\\GL32",
228 .brightness_set
= "SPLV",
229 .brightness_get
= "GPLV",
230 .display_set
= "SDSP",
231 .display_get
= "\\_SB.PCI0.PCI1.VGAC.NMAP"},
236 .mled_status
= "\\MALD",
238 .mt_lcd_switch
= "\\Q10",
239 .lcd_status
= "\\BKLG",
240 .brightness_set
= "SPLV",
241 .brightness_get
= "GPLV",
242 .display_set
= "SDSP",
243 .display_get
= "\\INFB"},
249 .mt_lcd_switch
= "EHK",
250 .lcd_status
= "\\_SB.PCI0.PM.PBC",
251 .brightness_set
= "SPLV",
252 .brightness_get
= "GPLV",
253 .display_set
= "SDSP",
254 .display_get
= "\\INFB"},
260 .wled_status
= "\\_SB.PCI0.SBRG.SG13",
261 .mt_lcd_switch
= xxN_PREFIX
"_Q10",
262 .lcd_status
= "\\_SB.PCI0.SBSM.SEO4",
263 .brightness_set
= "SPLV",
264 .brightness_get
= "GPLV",
265 .display_set
= "SDSP",
266 .display_get
= "\\_SB.PCI0.P0P1.VGA.GETD"},
271 /* WLED present, but not controlled by ACPI */
273 .mt_lcd_switch
= "\\Q0D",
274 .lcd_status
= "\\BAOF",
275 .brightness_set
= "SPLV",
276 .brightness_get
= "GPLV",
277 .display_set
= "SDSP",
278 .display_get
= "\\INFB"},
282 /* No features, but at least support the hotkeys */
288 .mt_lcd_switch
= M1A_PREFIX
"Q10",
289 .lcd_status
= "\\PNOF",
290 .brightness_up
= M1A_PREFIX
"Q0E",
291 .brightness_down
= M1A_PREFIX
"Q0F",
292 .brightness_status
= "\\BRIT",
293 .display_set
= "SDSP",
294 .display_get
= "\\INFB"},
300 .mt_lcd_switch
= "\\Q10",
301 .lcd_status
= "\\GP06",
302 .brightness_set
= "SPLV",
303 .brightness_get
= "GPLV",
304 .display_set
= "SDSP",
305 .display_get
= "\\INFB"},
311 .wled_status
= "\\_SB.PCI0.SBRG.SG13",
312 .mt_lcd_switch
= xxN_PREFIX
"_Q10",
313 .lcd_status
= "\\_SB.BKLT",
314 .brightness_set
= "SPLV",
315 .brightness_get
= "GPLV",
316 .display_set
= "SDSP",
317 .display_get
= "\\SSTE"},
323 .mt_lcd_switch
= xxN_PREFIX
"_Q10",
324 .lcd_status
= "\\_SB.PCI0.SBSM.SEO4",
325 .brightness_set
= "SPLV",
326 .brightness_get
= "GPLV",
327 .display_set
= "SDSP",
328 .display_get
= "\\_SB.PCI0.P0P1.VGA.GETD"},
333 .mt_lcd_switch
= P30_PREFIX
"_Q0E",
334 .lcd_status
= "\\BKLT",
335 .brightness_up
= P30_PREFIX
"_Q68",
336 .brightness_down
= P30_PREFIX
"_Q69",
337 .brightness_get
= "GPLV",
338 .display_set
= "SDSP",
339 .display_get
= "\\DNXT"},
344 .mled_status
= "\\EMLE",
346 .mt_lcd_switch
= S1x_PREFIX
"Q10",
347 .lcd_status
= "\\PNOF",
348 .brightness_set
= "SPLV",
349 .brightness_get
= "GPLV"},
354 .mled_status
= "\\MAIL",
355 .mt_lcd_switch
= S2x_PREFIX
"_Q10",
356 .lcd_status
= "\\BKLI",
357 .brightness_up
= S2x_PREFIX
"_Q0B",
358 .brightness_down
= S2x_PREFIX
"_Q0A"},
365 .mt_lcd_switch
= xxN_PREFIX
"_Q10",
366 .lcd_status
= "\\BKLT",
367 .brightness_set
= "SPLV",
368 .brightness_get
= "GPLV",
369 .display_set
= "SDSP",
370 .display_get
= "\\ADVG"},
374 .mt_bt_switch
= "BLED",
376 .mt_lcd_switch
= xxN_PREFIX
"_Q10",
377 .brightness_set
= "SPLV",
378 .brightness_get
= "GPLV",
379 .display_set
= "SDSP",
380 .display_get
= "\\ADVG"},
386 .mt_lcd_switch
= xxN_PREFIX
"_Q10",
387 .lcd_status
= "\\BKLT",
388 .brightness_set
= "SPLV",
389 .brightness_get
= "GPLV",
390 .display_set
= "SDSP",
391 .display_get
= "\\INFB"},
396 /* WLED present, but not controlled by ACPI */
397 .mt_lcd_switch
= xxN_PREFIX
"_Q10",
398 .lcd_status
= "\\BKLT",
399 .brightness_set
= "SPLV",
400 .brightness_get
= "GPLV",
401 .display_set
= "SDSP",
402 .display_get
= "\\ADVG"},
406 .brightness_set
= "SPLV",
407 .brightness_get
= "GPLV",
408 .mt_bt_switch
= "BLED",
414 .mt_bt_switch
= "BLED",
417 .brightness_get
= "GPLV",
418 .brightness_set
= "SPLV",
419 .mt_lcd_switch
= "\\_SB.PCI0.SBRG.EC0._Q10",
420 .lcd_status
= "\\_SB.PCI0.SBRG.EC0.RPIN",
421 .display_get
= "\\ADVG",
422 .display_set
= "SDSP",
426 .mt_bt_switch
= "BLED",
429 .mt_lcd_switch
= "\\Q10",
430 .lcd_status
= "\\GP06",
431 .brightness_set
= "SPLV",
432 .brightness_get
= "GPLV",
433 .display_set
= "SDSP",
434 .display_get
= "\\INFB"
439 static struct proc_dir_entry
*asus_proc_dir
;
441 static struct backlight_device
*asus_backlight_device
;
444 * This header is made available to allow proper configuration given model,
445 * revision number , ... this info cannot go in struct asus_hotk because it is
446 * available before the hotk
448 static struct acpi_table_header
*asus_info
;
450 /* The actual device the driver binds to */
451 static struct asus_hotk
*hotk
;
454 * The hotkey driver and autoloading declaration
456 static int asus_hotk_add(struct acpi_device
*device
);
457 static int asus_hotk_remove(struct acpi_device
*device
, int type
);
458 static void asus_hotk_notify(struct acpi_device
*device
, u32 event
);
460 static const struct acpi_device_id asus_device_ids
[] = {
464 MODULE_DEVICE_TABLE(acpi
, asus_device_ids
);
466 static struct acpi_driver asus_hotk_driver
= {
468 .class = ACPI_HOTK_CLASS
,
469 .owner
= THIS_MODULE
,
470 .ids
= asus_device_ids
,
471 .flags
= ACPI_DRIVER_ALL_NOTIFY_EVENTS
,
473 .add
= asus_hotk_add
,
474 .remove
= asus_hotk_remove
,
475 .notify
= asus_hotk_notify
,
480 * This function evaluates an ACPI method, given an int as parameter, the
481 * method is searched within the scope of the handle, can be NULL. The output
482 * of the method is written is output, which can also be NULL
484 * returns 1 if write is successful, 0 else.
486 static int write_acpi_int(acpi_handle handle
, const char *method
, int val
,
487 struct acpi_buffer
*output
)
489 struct acpi_object_list params
; /* list of input parameters (int) */
490 union acpi_object in_obj
; /* the only param we use */
494 params
.pointer
= &in_obj
;
495 in_obj
.type
= ACPI_TYPE_INTEGER
;
496 in_obj
.integer
.value
= val
;
498 status
= acpi_evaluate_object(handle
, (char *)method
, ¶ms
, output
);
499 return (status
== AE_OK
);
502 static int read_acpi_int(acpi_handle handle
, const char *method
, int *val
)
504 struct acpi_buffer output
;
505 union acpi_object out_obj
;
508 output
.length
= sizeof(out_obj
);
509 output
.pointer
= &out_obj
;
511 status
= acpi_evaluate_object(handle
, (char *)method
, NULL
, &output
);
512 *val
= out_obj
.integer
.value
;
513 return (status
== AE_OK
) && (out_obj
.type
== ACPI_TYPE_INTEGER
);
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 proc_read_info(char *page
, char **start
, off_t off
, int count
, int *eof
,
527 char buf
[16]; /* enough for all info */
529 * We use the easy way, we don't care of off and count,
530 * so we don't set eof to 1
533 len
+= sprintf(page
, ACPI_HOTK_NAME
" " ASUS_ACPI_VERSION
"\n");
534 len
+= sprintf(page
+ len
, "Model reference : %s\n",
535 hotk
->methods
->name
);
537 * The SFUN method probably allows the original driver to get the list
538 * of features supported by a given model. For now, 0x0100 or 0x0800
539 * bit signifies that the laptop is equipped with a Wi-Fi MiniPCI card.
540 * The significance of others is yet to be found.
542 if (read_acpi_int(hotk
->handle
, "SFUN", &temp
))
544 sprintf(page
+ len
, "SFUN value : 0x%04x\n", temp
);
546 * Another value for userspace: the ASYM method returns 0x02 for
547 * battery low and 0x04 for battery critical, its readings tend to be
548 * more accurate than those provided by _BST.
549 * Note: since not all the laptops provide this method, errors are
552 if (read_acpi_int(hotk
->handle
, "ASYM", &temp
))
554 sprintf(page
+ len
, "ASYM value : 0x%04x\n", temp
);
556 snprintf(buf
, 16, "%d", asus_info
->length
);
557 len
+= sprintf(page
+ len
, "DSDT length : %s\n", buf
);
558 snprintf(buf
, 16, "%d", asus_info
->checksum
);
559 len
+= sprintf(page
+ len
, "DSDT checksum : %s\n", buf
);
560 snprintf(buf
, 16, "%d", asus_info
->revision
);
561 len
+= sprintf(page
+ len
, "DSDT revision : %s\n", buf
);
562 snprintf(buf
, 7, "%s", asus_info
->oem_id
);
563 len
+= sprintf(page
+ len
, "OEM id : %s\n", buf
);
564 snprintf(buf
, 9, "%s", asus_info
->oem_table_id
);
565 len
+= sprintf(page
+ len
, "OEM table id : %s\n", buf
);
566 snprintf(buf
, 16, "%x", asus_info
->oem_revision
);
567 len
+= sprintf(page
+ len
, "OEM revision : 0x%s\n", buf
);
568 snprintf(buf
, 5, "%s", asus_info
->asl_compiler_id
);
569 len
+= sprintf(page
+ len
, "ASL comp vendor id : %s\n", buf
);
570 snprintf(buf
, 16, "%x", asus_info
->asl_compiler_revision
);
571 len
+= sprintf(page
+ len
, "ASL comp revision : 0x%s\n", buf
);
579 * We write our info in page, we begin at offset off and cannot write more
580 * than count bytes. We set eof to 1 if we handle those 2 values. We return the
581 * number of bytes written in page
584 /* Generic LED functions */
585 static int read_led(const char *ledname
, int ledmask
)
590 if (read_acpi_int(NULL
, ledname
, &led_status
))
593 printk(KERN_WARNING
"Asus ACPI: Error reading LED "
596 return (hotk
->status
& ledmask
) ? 1 : 0;
599 static int parse_arg(const char __user
*buf
, unsigned long count
, int *val
)
606 if (copy_from_user(s
, buf
, count
))
609 if (sscanf(s
, "%i", val
) != 1)
614 /* FIXME: kill extraneous args so it can be called independently */
616 write_led(const char __user
*buffer
, unsigned long count
,
617 char *ledname
, int ledmask
, int invert
)
622 rv
= parse_arg(buffer
, count
, &value
);
624 led_out
= value
? 1 : 0;
627 (led_out
) ? (hotk
->status
| ledmask
) : (hotk
->status
& ~ledmask
);
629 if (invert
) /* invert target value */
632 if (!write_acpi_int(hotk
->handle
, ledname
, led_out
, NULL
))
633 printk(KERN_WARNING
"Asus ACPI: LED (%s) write failed\n",
640 * Proc handlers for MLED
643 proc_read_mled(char *page
, char **start
, off_t off
, int count
, int *eof
,
646 return sprintf(page
, "%d\n",
647 read_led(hotk
->methods
->mled_status
, MLED_ON
));
651 proc_write_mled(struct file
*file
, const char __user
*buffer
,
652 unsigned long count
, void *data
)
654 return write_led(buffer
, count
, hotk
->methods
->mt_mled
, MLED_ON
, 1);
658 * Proc handlers for LED display
661 proc_read_ledd(char *page
, char **start
, off_t off
, int count
, int *eof
,
664 return sprintf(page
, "0x%08x\n", hotk
->ledd_status
);
668 proc_write_ledd(struct file
*file
, const char __user
*buffer
,
669 unsigned long count
, void *data
)
673 rv
= parse_arg(buffer
, count
, &value
);
676 (hotk
->handle
, hotk
->methods
->mt_ledd
, value
, NULL
))
678 "Asus ACPI: LED display write failed\n");
680 hotk
->ledd_status
= (u32
) value
;
686 * Proc handlers for WLED
689 proc_read_wled(char *page
, char **start
, off_t off
, int count
, int *eof
,
692 return sprintf(page
, "%d\n",
693 read_led(hotk
->methods
->wled_status
, WLED_ON
));
697 proc_write_wled(struct file
*file
, const char __user
*buffer
,
698 unsigned long count
, void *data
)
700 return write_led(buffer
, count
, hotk
->methods
->mt_wled
, WLED_ON
, 0);
704 * Proc handlers for Bluetooth
707 proc_read_bluetooth(char *page
, char **start
, off_t off
, int count
, int *eof
,
710 return sprintf(page
, "%d\n", read_led(hotk
->methods
->bt_status
, BT_ON
));
714 proc_write_bluetooth(struct file
*file
, const char __user
*buffer
,
715 unsigned long count
, void *data
)
717 /* Note: mt_bt_switch controls both internal Bluetooth adapter's
718 presence and its LED */
719 return write_led(buffer
, count
, hotk
->methods
->mt_bt_switch
, BT_ON
, 0);
723 * Proc handlers for TLED
726 proc_read_tled(char *page
, char **start
, off_t off
, int count
, int *eof
,
729 return sprintf(page
, "%d\n",
730 read_led(hotk
->methods
->tled_status
, TLED_ON
));
734 proc_write_tled(struct file
*file
, const char __user
*buffer
,
735 unsigned long count
, void *data
)
737 return write_led(buffer
, count
, hotk
->methods
->mt_tled
, TLED_ON
, 0);
740 static int get_lcd_state(void)
744 if (hotk
->model
== L3H
) {
745 /* L3H and the like have to be handled differently */
746 acpi_status status
= 0;
747 struct acpi_object_list input
;
748 union acpi_object mt_params
[2];
749 struct acpi_buffer output
;
750 union acpi_object out_obj
;
753 input
.pointer
= mt_params
;
754 /* Note: the following values are partly guessed up, but
755 otherwise they seem to work */
756 mt_params
[0].type
= ACPI_TYPE_INTEGER
;
757 mt_params
[0].integer
.value
= 0x02;
758 mt_params
[1].type
= ACPI_TYPE_INTEGER
;
759 mt_params
[1].integer
.value
= 0x02;
761 output
.length
= sizeof(out_obj
);
762 output
.pointer
= &out_obj
;
765 acpi_evaluate_object(NULL
, hotk
->methods
->lcd_status
,
769 if (out_obj
.type
== ACPI_TYPE_INTEGER
)
770 /* That's what the AML code does */
771 lcd
= out_obj
.integer
.value
>> 8;
772 } else if (hotk
->model
== F3Sa
) {
773 unsigned long long tmp
;
774 union acpi_object param
;
775 struct acpi_object_list input
;
779 param
.type
= ACPI_TYPE_INTEGER
;
780 param
.integer
.value
= 0x11;
782 input
.pointer
= ¶m
;
784 status
= acpi_evaluate_integer(NULL
, hotk
->methods
->lcd_status
,
791 /* We don't have to check anything if we are here */
792 if (!read_acpi_int(NULL
, hotk
->methods
->lcd_status
, &lcd
))
794 "Asus ACPI: Error reading LCD status\n");
796 if (hotk
->model
== L2D
)
803 static int set_lcd_state(int value
)
806 acpi_status status
= 0;
809 if (lcd
!= get_lcd_state()) {
811 if (hotk
->model
!= L3H
) {
813 acpi_evaluate_object(NULL
,
814 hotk
->methods
->mt_lcd_switch
,
817 /* L3H and the like must be handled differently */
819 (hotk
->handle
, hotk
->methods
->mt_lcd_switch
, 0x07,
822 /* L3H's AML executes EHK (0x07) upon Fn+F7 keypress,
823 the exact behaviour is simulated here */
825 if (ACPI_FAILURE(status
))
826 printk(KERN_WARNING
"Asus ACPI: Error switching LCD\n");
833 proc_read_lcd(char *page
, char **start
, off_t off
, int count
, int *eof
,
836 return sprintf(page
, "%d\n", get_lcd_state());
840 proc_write_lcd(struct file
*file
, const char __user
*buffer
,
841 unsigned long count
, void *data
)
845 rv
= parse_arg(buffer
, count
, &value
);
847 set_lcd_state(value
);
851 static int read_brightness(struct backlight_device
*bd
)
855 if (hotk
->methods
->brightness_get
) { /* SPLV/GPLV laptop */
856 if (!read_acpi_int(hotk
->handle
, hotk
->methods
->brightness_get
,
859 "Asus ACPI: Error reading brightness\n");
860 } else if (hotk
->methods
->brightness_status
) { /* For D1 for example */
861 if (!read_acpi_int(NULL
, hotk
->methods
->brightness_status
,
864 "Asus ACPI: Error reading brightness\n");
865 } else /* No GPLV method */
866 value
= hotk
->brightness
;
871 * Change the brightness level
873 static int set_brightness(int value
)
875 acpi_status status
= 0;
879 if (hotk
->methods
->brightness_set
) {
880 if (!write_acpi_int(hotk
->handle
, hotk
->methods
->brightness_set
,
883 "Asus ACPI: Error changing brightness\n");
888 /* No SPLV method if we are here, act as appropriate */
889 value
-= read_brightness(NULL
);
891 status
= acpi_evaluate_object(NULL
, (value
> 0) ?
892 hotk
->methods
->brightness_up
:
893 hotk
->methods
->brightness_down
,
895 (value
> 0) ? value
-- : value
++;
896 if (ACPI_FAILURE(status
))
898 "Asus ACPI: Error changing brightness\n");
905 static int set_brightness_status(struct backlight_device
*bd
)
907 return set_brightness(bd
->props
.brightness
);
911 proc_read_brn(char *page
, char **start
, off_t off
, int count
, int *eof
,
914 return sprintf(page
, "%d\n", read_brightness(NULL
));
918 proc_write_brn(struct file
*file
, const char __user
*buffer
,
919 unsigned long count
, void *data
)
923 rv
= parse_arg(buffer
, count
, &value
);
925 value
= (0 < value
) ? ((15 < value
) ? 15 : value
) : 0;
926 /* 0 <= value <= 15 */
927 set_brightness(value
);
932 static void set_display(int value
)
934 /* no sanity check needed for now */
935 if (!write_acpi_int(hotk
->handle
, hotk
->methods
->display_set
,
937 printk(KERN_WARNING
"Asus ACPI: Error setting display\n");
942 * Now, *this* one could be more user-friendly, but so far, no-one has
943 * complained. The significance of bits is the same as in proc_write_disp()
946 proc_read_disp(char *page
, char **start
, off_t off
, int count
, int *eof
,
951 if (!read_acpi_int(hotk
->handle
, hotk
->methods
->display_get
, &value
))
953 "Asus ACPI: Error reading display status\n");
954 value
&= 0x07; /* needed for some models, shouldn't hurt others */
955 return sprintf(page
, "%d\n", value
);
959 * Experimental support for display switching. As of now: 1 should activate
960 * the LCD output, 2 should do for CRT, and 4 for TV-Out. Any combination
961 * (bitwise) of these will suffice. I never actually tested 3 displays hooked
962 * up simultaneously, so be warned. See the acpi4asus README for more info.
965 proc_write_disp(struct file
*file
, const char __user
*buffer
,
966 unsigned long count
, void *data
)
970 rv
= parse_arg(buffer
, count
, &value
);
976 typedef int (proc_readfunc
) (char *page
, char **start
, off_t off
, int count
,
977 int *eof
, void *data
);
978 typedef int (proc_writefunc
) (struct file
*file
, const char __user
*buffer
,
979 unsigned long count
, void *data
);
982 asus_proc_add(char *name
, proc_writefunc
*writefunc
,
983 proc_readfunc
*readfunc
, mode_t mode
,
984 struct acpi_device
*device
)
986 struct proc_dir_entry
*proc
=
987 create_proc_entry(name
, mode
, acpi_device_dir(device
));
989 printk(KERN_WARNING
" Unable to create %s fs entry\n", name
);
992 proc
->write_proc
= writefunc
;
993 proc
->read_proc
= readfunc
;
994 proc
->data
= acpi_driver_data(device
);
995 proc
->uid
= asus_uid
;
996 proc
->gid
= asus_gid
;
1000 static int asus_hotk_add_fs(struct acpi_device
*device
)
1002 struct proc_dir_entry
*proc
;
1006 * If parameter uid or gid is not changed, keep the default setting for
1007 * our proc entries (-rw-rw-rw-) else, it means we care about security,
1008 * and then set to -rw-rw----
1011 if ((asus_uid
== 0) && (asus_gid
== 0)) {
1012 mode
= S_IFREG
| S_IRUGO
| S_IWUGO
;
1014 mode
= S_IFREG
| S_IRUSR
| S_IRGRP
| S_IWUSR
| S_IWGRP
;
1015 printk(KERN_WARNING
" asus_uid and asus_gid parameters are "
1016 "deprecated, use chown and chmod instead!\n");
1019 acpi_device_dir(device
) = asus_proc_dir
;
1020 if (!acpi_device_dir(device
))
1023 proc
= create_proc_entry(PROC_INFO
, mode
, acpi_device_dir(device
));
1025 proc
->read_proc
= proc_read_info
;
1026 proc
->data
= acpi_driver_data(device
);
1027 proc
->uid
= asus_uid
;
1028 proc
->gid
= asus_gid
;
1030 printk(KERN_WARNING
" Unable to create " PROC_INFO
1034 if (hotk
->methods
->mt_wled
) {
1035 asus_proc_add(PROC_WLED
, &proc_write_wled
, &proc_read_wled
,
1039 if (hotk
->methods
->mt_ledd
) {
1040 asus_proc_add(PROC_LEDD
, &proc_write_ledd
, &proc_read_ledd
,
1044 if (hotk
->methods
->mt_mled
) {
1045 asus_proc_add(PROC_MLED
, &proc_write_mled
, &proc_read_mled
,
1049 if (hotk
->methods
->mt_tled
) {
1050 asus_proc_add(PROC_TLED
, &proc_write_tled
, &proc_read_tled
,
1054 if (hotk
->methods
->mt_bt_switch
) {
1055 asus_proc_add(PROC_BT
, &proc_write_bluetooth
,
1056 &proc_read_bluetooth
, mode
, device
);
1060 * We need both read node and write method as LCD switch is also
1061 * accessible from the keyboard
1063 if (hotk
->methods
->mt_lcd_switch
&& hotk
->methods
->lcd_status
) {
1064 asus_proc_add(PROC_LCD
, &proc_write_lcd
, &proc_read_lcd
, mode
,
1068 if ((hotk
->methods
->brightness_up
&& hotk
->methods
->brightness_down
) ||
1069 (hotk
->methods
->brightness_get
&& hotk
->methods
->brightness_set
)) {
1070 asus_proc_add(PROC_BRN
, &proc_write_brn
, &proc_read_brn
, mode
,
1074 if (hotk
->methods
->display_set
) {
1075 asus_proc_add(PROC_DISP
, &proc_write_disp
, &proc_read_disp
,
1082 static int asus_hotk_remove_fs(struct acpi_device
*device
)
1084 if (acpi_device_dir(device
)) {
1085 remove_proc_entry(PROC_INFO
, acpi_device_dir(device
));
1086 if (hotk
->methods
->mt_wled
)
1087 remove_proc_entry(PROC_WLED
, acpi_device_dir(device
));
1088 if (hotk
->methods
->mt_mled
)
1089 remove_proc_entry(PROC_MLED
, acpi_device_dir(device
));
1090 if (hotk
->methods
->mt_tled
)
1091 remove_proc_entry(PROC_TLED
, acpi_device_dir(device
));
1092 if (hotk
->methods
->mt_ledd
)
1093 remove_proc_entry(PROC_LEDD
, acpi_device_dir(device
));
1094 if (hotk
->methods
->mt_bt_switch
)
1095 remove_proc_entry(PROC_BT
, acpi_device_dir(device
));
1096 if (hotk
->methods
->mt_lcd_switch
&& hotk
->methods
->lcd_status
)
1097 remove_proc_entry(PROC_LCD
, acpi_device_dir(device
));
1098 if ((hotk
->methods
->brightness_up
1099 && hotk
->methods
->brightness_down
)
1100 || (hotk
->methods
->brightness_get
1101 && hotk
->methods
->brightness_set
))
1102 remove_proc_entry(PROC_BRN
, acpi_device_dir(device
));
1103 if (hotk
->methods
->display_set
)
1104 remove_proc_entry(PROC_DISP
, acpi_device_dir(device
));
1109 static void asus_hotk_notify(struct acpi_device
*device
, u32 event
)
1111 /* TODO Find a better way to handle events count. */
1116 * The BIOS *should* be sending us device events, but apparently
1117 * Asus uses system events instead, so just ignore any device
1120 if (event
> ACPI_MAX_SYS_NOTIFY
)
1123 if ((event
& ~((u32
) BR_UP
)) < 16)
1124 hotk
->brightness
= (event
& ~((u32
) BR_UP
));
1125 else if ((event
& ~((u32
) BR_DOWN
)) < 16)
1126 hotk
->brightness
= (event
& ~((u32
) BR_DOWN
));
1128 acpi_bus_generate_proc_event(hotk
->device
, event
,
1129 hotk
->event_count
[event
% 128]++);
1135 * Match the model string to the list of supported models. Return END_MODEL if
1136 * no match or model is NULL.
1138 static int asus_model_match(char *model
)
1143 if (strncmp(model
, "L3D", 3) == 0)
1145 else if (strncmp(model
, "L2E", 3) == 0 ||
1146 strncmp(model
, "L3H", 3) == 0 || strncmp(model
, "L5D", 3) == 0)
1148 else if (strncmp(model
, "L3", 2) == 0 || strncmp(model
, "L2B", 3) == 0)
1150 else if (strncmp(model
, "L8L", 3) == 0)
1152 else if (strncmp(model
, "L4R", 3) == 0)
1154 else if (strncmp(model
, "M6N", 3) == 0 || strncmp(model
, "W3N", 3) == 0)
1156 else if (strncmp(model
, "M6R", 3) == 0 || strncmp(model
, "A3G", 3) == 0)
1158 else if (strncmp(model
, "M2N", 3) == 0 ||
1159 strncmp(model
, "M3N", 3) == 0 ||
1160 strncmp(model
, "M5N", 3) == 0 ||
1161 strncmp(model
, "M6N", 3) == 0 ||
1162 strncmp(model
, "S1N", 3) == 0 ||
1163 strncmp(model
, "S5N", 3) == 0 || strncmp(model
, "W1N", 3) == 0)
1165 else if (strncmp(model
, "M1", 2) == 0)
1167 else if (strncmp(model
, "M2", 2) == 0 || strncmp(model
, "L4E", 3) == 0)
1169 else if (strncmp(model
, "L2", 2) == 0)
1171 else if (strncmp(model
, "L8", 2) == 0)
1173 else if (strncmp(model
, "D1", 2) == 0)
1175 else if (strncmp(model
, "A1", 2) == 0)
1177 else if (strncmp(model
, "A2", 2) == 0)
1179 else if (strncmp(model
, "J1", 2) == 0)
1181 else if (strncmp(model
, "L5", 2) == 0)
1183 else if (strncmp(model
, "A4G", 3) == 0)
1185 else if (strncmp(model
, "W1N", 3) == 0)
1187 else if (strncmp(model
, "W3V", 3) == 0)
1189 else if (strncmp(model
, "W5A", 3) == 0)
1191 else if (strncmp(model
, "R1F", 3) == 0)
1193 else if (strncmp(model
, "A4S", 3) == 0)
1195 else if (strncmp(model
, "F3Sa", 4) == 0)
1202 * This function is used to initialize the hotk with right values. In this
1203 * method, we can make all the detection we want, and modify the hotk struct
1205 static int asus_hotk_get_info(void)
1207 struct acpi_buffer buffer
= { ACPI_ALLOCATE_BUFFER
, NULL
};
1208 union acpi_object
*model
= NULL
;
1210 char *string
= NULL
;
1214 * Get DSDT headers early enough to allow for differentiating between
1215 * models, but late enough to allow acpi_bus_register_driver() to fail
1216 * before doing anything ACPI-specific. Should we encounter a machine,
1217 * which needs special handling (i.e. its hotkey device has a different
1218 * HID), this bit will be moved. A global variable asus_info contains
1221 status
= acpi_get_table(ACPI_SIG_DSDT
, 1, &asus_info
);
1222 if (ACPI_FAILURE(status
))
1223 printk(KERN_WARNING
" Couldn't get the DSDT table header\n");
1225 /* We have to write 0 on init this far for all ASUS models */
1226 if (!write_acpi_int(hotk
->handle
, "INIT", 0, &buffer
)) {
1227 printk(KERN_ERR
" Hotkey initialization failed\n");
1231 /* This needs to be called for some laptops to init properly */
1232 if (!read_acpi_int(hotk
->handle
, "BSTS", &bsts_result
))
1233 printk(KERN_WARNING
" Error calling BSTS\n");
1234 else if (bsts_result
)
1235 printk(KERN_NOTICE
" BSTS called, 0x%02x returned\n",
1239 * Try to match the object returned by INIT to the specific model.
1240 * Handle every possible object (or the lack of thereof) the DSDT
1241 * writers might throw at us. When in trouble, we pass NULL to
1242 * asus_model_match() and try something completely different.
1244 if (buffer
.pointer
) {
1245 model
= buffer
.pointer
;
1246 switch (model
->type
) {
1247 case ACPI_TYPE_STRING
:
1248 string
= model
->string
.pointer
;
1250 case ACPI_TYPE_BUFFER
:
1251 string
= model
->buffer
.pointer
;
1259 hotk
->model
= asus_model_match(string
);
1260 if (hotk
->model
== END_MODEL
) { /* match failed */
1262 strncmp(asus_info
->oem_table_id
, "ODEM", 4) == 0) {
1265 " Samsung P30 detected, supported\n");
1268 printk(KERN_NOTICE
" unsupported model %s, trying "
1269 "default values\n", string
);
1271 " send /proc/acpi/dsdt to the developers\n");
1275 hotk
->methods
= &model_conf
[hotk
->model
];
1278 hotk
->methods
= &model_conf
[hotk
->model
];
1279 printk(KERN_NOTICE
" %s model detected, supported\n", string
);
1281 /* Sort of per-model blacklist */
1282 if (strncmp(string
, "L2B", 3) == 0)
1283 hotk
->methods
->lcd_status
= NULL
;
1284 /* L2B is similar enough to L3C to use its settings, with this only
1286 else if (strncmp(string
, "A3G", 3) == 0)
1287 hotk
->methods
->lcd_status
= "\\BLFG";
1288 /* A3G is like M6R */
1289 else if (strncmp(string
, "S5N", 3) == 0 ||
1290 strncmp(string
, "M5N", 3) == 0 ||
1291 strncmp(string
, "W3N", 3) == 0)
1292 hotk
->methods
->mt_mled
= NULL
;
1293 /* S5N, M5N and W3N have no MLED */
1294 else if (strncmp(string
, "L5D", 3) == 0)
1295 hotk
->methods
->mt_wled
= NULL
;
1296 /* L5D's WLED is not controlled by ACPI */
1297 else if (strncmp(string
, "M2N", 3) == 0 ||
1298 strncmp(string
, "W3V", 3) == 0 ||
1299 strncmp(string
, "S1N", 3) == 0)
1300 hotk
->methods
->mt_wled
= "WLED";
1301 /* M2N, S1N and W3V have a usable WLED */
1302 else if (asus_info
) {
1303 if (strncmp(asus_info
->oem_table_id
, "L1", 2) == 0)
1304 hotk
->methods
->mled_status
= NULL
;
1305 /* S1300A reports L84F, but L1400B too, account for that */
1313 static int asus_hotk_check(void)
1317 result
= acpi_bus_get_status(hotk
->device
);
1321 if (hotk
->device
->status
.present
) {
1322 result
= asus_hotk_get_info();
1324 printk(KERN_ERR
" Hotkey device not present, aborting\n");
1331 static int asus_hotk_found
;
1333 static int asus_hotk_add(struct acpi_device
*device
)
1335 acpi_status status
= AE_OK
;
1338 printk(KERN_NOTICE
"Asus Laptop ACPI Extras version %s\n",
1341 hotk
= kzalloc(sizeof(struct asus_hotk
), GFP_KERNEL
);
1345 hotk
->handle
= device
->handle
;
1346 strcpy(acpi_device_name(device
), ACPI_HOTK_DEVICE_NAME
);
1347 strcpy(acpi_device_class(device
), ACPI_HOTK_CLASS
);
1348 device
->driver_data
= hotk
;
1349 hotk
->device
= device
;
1351 result
= asus_hotk_check();
1355 result
= asus_hotk_add_fs(device
);
1359 /* For laptops without GPLV: init the hotk->brightness value */
1360 if ((!hotk
->methods
->brightness_get
)
1361 && (!hotk
->methods
->brightness_status
)
1362 && (hotk
->methods
->brightness_up
&& hotk
->methods
->brightness_down
)) {
1364 acpi_evaluate_object(NULL
, hotk
->methods
->brightness_down
,
1366 if (ACPI_FAILURE(status
))
1367 printk(KERN_WARNING
" Error changing brightness\n");
1370 acpi_evaluate_object(NULL
,
1371 hotk
->methods
->brightness_up
,
1373 if (ACPI_FAILURE(status
))
1374 printk(KERN_WARNING
" Strange, error changing"
1379 asus_hotk_found
= 1;
1381 /* LED display is off by default */
1382 hotk
->ledd_status
= 0xFFF;
1391 static int asus_hotk_remove(struct acpi_device
*device
, int type
)
1393 asus_hotk_remove_fs(device
);
1400 static struct backlight_ops asus_backlight_data
= {
1401 .get_brightness
= read_brightness
,
1402 .update_status
= set_brightness_status
,
1405 static void asus_acpi_exit(void)
1407 if (asus_backlight_device
)
1408 backlight_device_unregister(asus_backlight_device
);
1410 acpi_bus_unregister_driver(&asus_hotk_driver
);
1411 remove_proc_entry(PROC_ASUS
, acpi_root_dir
);
1416 static int __init
asus_acpi_init(void)
1420 result
= acpi_bus_register_driver(&asus_hotk_driver
);
1424 asus_proc_dir
= proc_mkdir(PROC_ASUS
, acpi_root_dir
);
1425 if (!asus_proc_dir
) {
1426 printk(KERN_ERR
"Asus ACPI: Unable to create /proc entry\n");
1427 acpi_bus_unregister_driver(&asus_hotk_driver
);
1432 * This is a bit of a kludge. We only want this module loaded
1433 * for ASUS systems, but there's currently no way to probe the
1434 * ACPI namespace for ASUS HIDs. So we just return failure if
1435 * we didn't find one, which will cause the module to be
1438 if (!asus_hotk_found
) {
1439 acpi_bus_unregister_driver(&asus_hotk_driver
);
1440 remove_proc_entry(PROC_ASUS
, acpi_root_dir
);
1444 asus_backlight_device
= backlight_device_register("asus", NULL
, NULL
,
1445 &asus_backlight_data
);
1446 if (IS_ERR(asus_backlight_device
)) {
1447 printk(KERN_ERR
"Could not register asus backlight device\n");
1448 asus_backlight_device
= NULL
;
1452 asus_backlight_device
->props
.max_brightness
= 15;
1457 module_init(asus_acpi_init
);
1458 module_exit(asus_acpi_exit
);