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.
32 #include <linux/kernel.h>
33 #include <linux/module.h>
34 #include <linux/init.h>
35 #include <linux/types.h>
36 #include <linux/proc_fs.h>
37 #include <acpi/acpi_drivers.h>
38 #include <acpi/acpi_bus.h>
39 #include <asm/uaccess.h>
41 #define ASUS_ACPI_VERSION "0.30"
43 #define PROC_ASUS "asus" //the directory
44 #define PROC_MLED "mled"
45 #define PROC_WLED "wled"
46 #define PROC_TLED "tled"
47 #define PROC_INFO "info"
48 #define PROC_LCD "lcd"
49 #define PROC_BRN "brn"
50 #define PROC_DISP "disp"
52 #define ACPI_HOTK_NAME "Asus Laptop ACPI Extras Driver"
53 #define ACPI_HOTK_CLASS "hotkey"
54 #define ACPI_HOTK_DEVICE_NAME "Hotkey"
55 #define ACPI_HOTK_HID "ATK0100"
58 * Some events we use, same for all Asus
64 * Flags for hotk status
66 #define MLED_ON 0x01 //is MLED ON ?
70 MODULE_AUTHOR("Julien Lerouge, Karol Kozimor");
71 MODULE_DESCRIPTION(ACPI_HOTK_NAME);
72 MODULE_LICENSE("GPL");
74 static uid_t asus_uid;
75 static gid_t asus_gid;
76 module_param(asus_uid, uint, 0);
77 MODULE_PARM_DESC(asus_uid, "UID for entries in /proc/acpi/asus.\n");
78 module_param(asus_gid, uint, 0);
79 MODULE_PARM_DESC(asus_gid, "GID for entries in /proc/acpi/asus.\n");
81 /* For each model, all features implemented,
82 * those marked with R are relative to HOTK, A for absolute */
84 char *name; //name of the laptop________________A
85 char *mt_mled; //method to handle mled_____________R
86 char *mled_status; //node to handle mled reading_______A
87 char *mt_wled; //method to handle wled_____________R
88 char *wled_status; //node to handle wled reading_______A
89 char *mt_tled; //method to handle tled_____________R
90 char *tled_status; //node to handle tled reading_______A
91 char *mt_lcd_switch; //method to turn LCD ON/OFF_________A
92 char *lcd_status; //node to read LCD panel state______A
93 char *brightness_up; //method to set brightness up_______A
94 char *brightness_down; //guess what ?______________________A
95 char *brightness_set; //method to set absolute brightness_R
96 char *brightness_get; //method to get absolute brightness_R
97 char *brightness_status; //node to get brightness____________A
98 char *display_set; //method to set video output________R
99 char *display_get; //method to get video output________R
103 * This is the main structure, we can use it to store anything interesting
104 * about the hotk device
107 struct acpi_device *device; //the device we are in
108 acpi_handle handle; //the handle of the hotk device
109 char status; //status of the hotk, for LEDs, ...
110 struct model_data *methods; //methods available on the laptop
111 u8 brightness; //brightness level
113 A1x = 0, //A1340D, A1300F
119 L3H, //L3H, but also L2000E
124 M2E, //M2400E, L4400L
128 S1x, //S1300A, but also L1400B and M2400A (L84F)
129 S2x, //S200 (J1 reported), Victor MP-XP7210
130 xxN, //M2400N, M3700N, M5200N, S1300N, S5200N, W1OOON
133 } model; //Models currently supported
134 u16 event_count[128]; //count for each event TODO make this better
138 #define A1x_PREFIX "\\_SB.PCI0.ISA.EC0."
139 #define L3C_PREFIX "\\_SB.PCI0.PX40.ECD0."
140 #define M1A_PREFIX "\\_SB.PCI0.PX40.EC0."
141 #define P30_PREFIX "\\_SB.PCI0.LPCB.EC0."
142 #define S1x_PREFIX "\\_SB.PCI0.PX40."
143 #define S2x_PREFIX A1x_PREFIX
144 #define xxN_PREFIX "\\_SB.PCI0.SBRG.EC0."
146 static struct model_data model_conf[END_MODEL] = {
148 * TODO I have seen a SWBX and AIBX method on some models, like L1400B,
149 * it seems to be a kind of switch, but what for ?
155 .mled_status = "\\MAIL",
156 .mt_lcd_switch = A1x_PREFIX "_Q10",
157 .lcd_status = "\\BKLI",
158 .brightness_up = A1x_PREFIX "_Q0E",
159 .brightness_down = A1x_PREFIX "_Q0F"},
165 .wled_status = "\\SG66",
166 .mt_lcd_switch = "\\Q10",
167 .lcd_status = "\\BAOF",
168 .brightness_set = "SPLV",
169 .brightness_get = "GPLV",
170 .display_set = "SDSP",
171 .display_get = "\\INFB"},
176 .mt_lcd_switch = "\\Q0D",
177 .lcd_status = "\\GP11",
178 .brightness_up = "\\Q0C",
179 .brightness_down = "\\Q0B",
180 .brightness_status = "\\BLVL",
181 .display_set = "SDSP",
182 .display_get = "\\INFB"},
187 .mled_status = "\\SGP6",
189 .wled_status = "\\RCP3",
190 .mt_lcd_switch = "\\Q10",
191 .lcd_status = "\\SGP0",
192 .brightness_up = "\\Q0E",
193 .brightness_down = "\\Q0F",
194 .display_set = "SDSP",
195 .display_get = "\\INFB"},
201 .mt_lcd_switch = L3C_PREFIX "_Q10",
202 .lcd_status = "\\GL32",
203 .brightness_set = "SPLV",
204 .brightness_get = "GPLV",
205 .display_set = "SDSP",
206 .display_get = "\\_SB.PCI0.PCI1.VGAC.NMAP"},
211 .mled_status = "\\MALD",
213 .mt_lcd_switch = "\\Q10",
214 .lcd_status = "\\BKLG",
215 .brightness_set = "SPLV",
216 .brightness_get = "GPLV",
217 .display_set = "SDSP",
218 .display_get = "\\INFB"},
224 .mt_lcd_switch = "EHK",
225 .lcd_status = "\\_SB.PCI0.PM.PBC",
226 .brightness_set = "SPLV",
227 .brightness_get = "GPLV",
228 .display_set = "SDSP",
229 .display_get = "\\INFB"},
235 .wled_status = "\\_SB.PCI0.SBRG.SG13",
236 .mt_lcd_switch = xxN_PREFIX "_Q10",
237 .lcd_status = "\\_SB.PCI0.SBSM.SEO4",
238 .brightness_set = "SPLV",
239 .brightness_get = "GPLV",
240 .display_set = "SDSP",
241 .display_get = "\\_SB.PCI0.P0P1.VGA.GETD"},
246 /* WLED present, but not controlled by ACPI */
248 .mt_lcd_switch = "\\Q0D",
249 .lcd_status = "\\BAOF",
250 .brightness_set = "SPLV",
251 .brightness_get = "GPLV",
252 .display_set = "SDSP",
253 .display_get = "\\INFB"},
257 /* No features, but at least support the hotkeys */
263 .mt_lcd_switch = M1A_PREFIX "Q10",
264 .lcd_status = "\\PNOF",
265 .brightness_up = M1A_PREFIX "Q0E",
266 .brightness_down = M1A_PREFIX "Q0F",
267 .brightness_status = "\\BRIT",
268 .display_set = "SDSP",
269 .display_get = "\\INFB"},
275 .mt_lcd_switch = "\\Q10",
276 .lcd_status = "\\GP06",
277 .brightness_set = "SPLV",
278 .brightness_get = "GPLV",
279 .display_set = "SDSP",
280 .display_get = "\\INFB"},
286 .wled_status = "\\_SB.PCI0.SBRG.SG13",
287 .mt_lcd_switch = xxN_PREFIX "_Q10",
288 .lcd_status = "\\_SB.BKLT",
289 .brightness_set = "SPLV",
290 .brightness_get = "GPLV",
291 .display_set = "SDSP",
292 .display_get = "\\_SB.PCI0.P0P1.VGA.GETD"},
297 .mt_lcd_switch = xxN_PREFIX "_Q10",
298 .lcd_status = "\\_SB.PCI0.SBSM.SEO4",
299 .brightness_set = "SPLV",
300 .brightness_get = "GPLV",
301 .display_set = "SDSP",
302 .display_get = "\\SSTE"},
307 .mt_lcd_switch = P30_PREFIX "_Q0E",
308 .lcd_status = "\\BKLT",
309 .brightness_up = P30_PREFIX "_Q68",
310 .brightness_down = P30_PREFIX "_Q69",
311 .brightness_get = "GPLV",
312 .display_set = "SDSP",
313 .display_get = "\\DNXT"},
318 .mled_status = "\\EMLE",
320 .mt_lcd_switch = S1x_PREFIX "Q10",
321 .lcd_status = "\\PNOF",
322 .brightness_set = "SPLV",
323 .brightness_get = "GPLV"},
328 .mled_status = "\\MAIL",
329 .mt_lcd_switch = S2x_PREFIX "_Q10",
330 .lcd_status = "\\BKLI",
331 .brightness_up = S2x_PREFIX "_Q0B",
332 .brightness_down = S2x_PREFIX "_Q0A"},
337 /* WLED present, but not controlled by ACPI */
338 .mt_lcd_switch = xxN_PREFIX "_Q10",
339 .lcd_status = "\\BKLT",
340 .brightness_set = "SPLV",
341 .brightness_get = "GPLV",
342 .display_set = "SDSP",
343 .display_get = "\\ADVG"}
347 static struct proc_dir_entry *asus_proc_dir;
350 * This header is made available to allow proper configuration given model,
351 * revision number , ... this info cannot go in struct asus_hotk because it is
352 * available before the hotk
354 static struct acpi_table_header *asus_info;
356 /* The actual device the driver binds to */
357 static struct asus_hotk *hotk;
360 * The hotkey driver declaration
362 static int asus_hotk_add(struct acpi_device *device);
363 static int asus_hotk_remove(struct acpi_device *device, int type);
364 static struct acpi_driver asus_hotk_driver = {
365 .name = ACPI_HOTK_NAME,
366 .class = ACPI_HOTK_CLASS,
367 .ids = ACPI_HOTK_HID,
369 .add = asus_hotk_add,
370 .remove = asus_hotk_remove,
375 * This function evaluates an ACPI method, given an int as parameter, the
376 * method is searched within the scope of the handle, can be NULL. The output
377 * of the method is written is output, which can also be NULL
379 * returns 1 if write is successful, 0 else.
381 static int write_acpi_int(acpi_handle handle, const char *method, int val,
382 struct acpi_buffer *output)
384 struct acpi_object_list params; //list of input parameters (an int here)
385 union acpi_object in_obj; //the only param we use
389 params.pointer = &in_obj;
390 in_obj.type = ACPI_TYPE_INTEGER;
391 in_obj.integer.value = val;
393 status = acpi_evaluate_object(handle, (char *)method, ¶ms, output);
394 return (status == AE_OK);
397 static int read_acpi_int(acpi_handle handle, const char *method, int *val)
399 struct acpi_buffer output;
400 union acpi_object out_obj;
403 output.length = sizeof(out_obj);
404 output.pointer = &out_obj;
406 status = acpi_evaluate_object(handle, (char *)method, NULL, &output);
407 *val = out_obj.integer.value;
408 return (status == AE_OK) && (out_obj.type == ACPI_TYPE_INTEGER);
412 * We write our info in page, we begin at offset off and cannot write more
413 * than count bytes. We set eof to 1 if we handle those 2 values. We return the
414 * number of bytes written in page
417 proc_read_info(char *page, char **start, off_t off, int count, int *eof,
422 char buf[16]; //enough for all info
424 * We use the easy way, we don't care of off and count, so we don't set eof
428 len += sprintf(page, ACPI_HOTK_NAME " " ASUS_ACPI_VERSION "\n");
429 len += sprintf(page + len, "Model reference : %s\n",
430 hotk->methods->name);
432 * The SFUN method probably allows the original driver to get the list
433 * of features supported by a given model. For now, 0x0100 or 0x0800
434 * bit signifies that the laptop is equipped with a Wi-Fi MiniPCI card.
435 * The significance of others is yet to be found.
437 if (read_acpi_int(hotk->handle, "SFUN", &temp))
439 sprintf(page + len, "SFUN value : 0x%04x\n", temp);
441 * Another value for userspace: the ASYM method returns 0x02 for
442 * battery low and 0x04 for battery critical, its readings tend to be
443 * more accurate than those provided by _BST.
444 * Note: since not all the laptops provide this method, errors are
447 if (read_acpi_int(hotk->handle, "ASYM", &temp))
449 sprintf(page + len, "ASYM value : 0x%04x\n", temp);
451 snprintf(buf, 16, "%d", asus_info->length);
452 len += sprintf(page + len, "DSDT length : %s\n", buf);
453 snprintf(buf, 16, "%d", asus_info->checksum);
454 len += sprintf(page + len, "DSDT checksum : %s\n", buf);
455 snprintf(buf, 16, "%d", asus_info->revision);
456 len += sprintf(page + len, "DSDT revision : %s\n", buf);
457 snprintf(buf, 7, "%s", asus_info->oem_id);
458 len += sprintf(page + len, "OEM id : %s\n", buf);
459 snprintf(buf, 9, "%s", asus_info->oem_table_id);
460 len += sprintf(page + len, "OEM table id : %s\n", buf);
461 snprintf(buf, 16, "%x", asus_info->oem_revision);
462 len += sprintf(page + len, "OEM revision : 0x%s\n", buf);
463 snprintf(buf, 5, "%s", asus_info->asl_compiler_id);
464 len += sprintf(page + len, "ASL comp vendor id : %s\n", buf);
465 snprintf(buf, 16, "%x", asus_info->asl_compiler_revision);
466 len += sprintf(page + len, "ASL comp revision : 0x%s\n", buf);
474 * We write our info in page, we begin at offset off and cannot write more
475 * than count bytes. We set eof to 1 if we handle those 2 values. We return the
476 * number of bytes written in page
479 /* Generic LED functions */
480 static int read_led(const char *ledname, int ledmask)
485 if (read_acpi_int(NULL, ledname, &led_status))
488 printk(KERN_WARNING "Asus ACPI: Error reading LED "
491 return (hotk->status & ledmask) ? 1 : 0;
494 static int parse_arg(const char __user * buf, unsigned long count, int *val)
501 if (copy_from_user(s, buf, count))
504 if (sscanf(s, "%i", val) != 1)
509 /* FIXME: kill extraneous args so it can be called independently */
511 write_led(const char __user * buffer, unsigned long count,
512 char *ledname, int ledmask, int invert)
517 count = parse_arg(buffer, count, &value);
519 led_out = value ? 1 : 0;
522 (led_out) ? (hotk->status | ledmask) : (hotk->status & ~ledmask);
524 if (invert) /* invert target value */
525 led_out = !led_out & 0x1;
527 if (!write_acpi_int(hotk->handle, ledname, led_out, NULL))
528 printk(KERN_WARNING "Asus ACPI: LED (%s) write failed\n",
535 * Proc handlers for MLED
538 proc_read_mled(char *page, char **start, off_t off, int count, int *eof,
541 return sprintf(page, "%d\n",
542 read_led(hotk->methods->mled_status, MLED_ON));
546 proc_write_mled(struct file *file, const char __user * buffer,
547 unsigned long count, void *data)
549 return write_led(buffer, count, hotk->methods->mt_mled, MLED_ON, 1);
553 * Proc handlers for WLED
556 proc_read_wled(char *page, char **start, off_t off, int count, int *eof,
559 return sprintf(page, "%d\n",
560 read_led(hotk->methods->wled_status, WLED_ON));
564 proc_write_wled(struct file *file, const char __user * buffer,
565 unsigned long count, void *data)
567 return write_led(buffer, count, hotk->methods->mt_wled, WLED_ON, 0);
571 * Proc handlers for TLED
574 proc_read_tled(char *page, char **start, off_t off, int count, int *eof,
577 return sprintf(page, "%d\n",
578 read_led(hotk->methods->tled_status, TLED_ON));
582 proc_write_tled(struct file *file, const char __user * buffer,
583 unsigned long count, void *data)
585 return write_led(buffer, count, hotk->methods->mt_tled, TLED_ON, 0);
588 static int get_lcd_state(void)
592 if (hotk->model != L3H) {
593 /* We don't have to check anything if we are here */
594 if (!read_acpi_int(NULL, hotk->methods->lcd_status, &lcd))
596 "Asus ACPI: Error reading LCD status\n");
598 if (hotk->model == L2D)
600 } else { /* L3H and the like have to be handled differently */
601 acpi_status status = 0;
602 struct acpi_object_list input;
603 union acpi_object mt_params[2];
604 struct acpi_buffer output;
605 union acpi_object out_obj;
608 input.pointer = mt_params;
609 /* Note: the following values are partly guessed up, but
610 otherwise they seem to work */
611 mt_params[0].type = ACPI_TYPE_INTEGER;
612 mt_params[0].integer.value = 0x02;
613 mt_params[1].type = ACPI_TYPE_INTEGER;
614 mt_params[1].integer.value = 0x02;
616 output.length = sizeof(out_obj);
617 output.pointer = &out_obj;
620 acpi_evaluate_object(NULL, hotk->methods->lcd_status,
624 if (out_obj.type == ACPI_TYPE_INTEGER)
625 /* That's what the AML code does */
626 lcd = out_obj.integer.value >> 8;
632 static int set_lcd_state(int value)
635 acpi_status status = 0;
638 if (lcd != get_lcd_state()) {
640 if (hotk->model != L3H) {
642 acpi_evaluate_object(NULL,
643 hotk->methods->mt_lcd_switch,
645 } else { /* L3H and the like have to be handled differently */
647 (hotk->handle, hotk->methods->mt_lcd_switch, 0x07,
650 /* L3H's AML executes EHK (0x07) upon Fn+F7 keypress,
651 the exact behaviour is simulated here */
653 if (ACPI_FAILURE(status))
654 printk(KERN_WARNING "Asus ACPI: Error switching LCD\n");
661 proc_read_lcd(char *page, char **start, off_t off, int count, int *eof,
664 return sprintf(page, "%d\n", get_lcd_state());
668 proc_write_lcd(struct file *file, const char __user * buffer,
669 unsigned long count, void *data)
673 count = parse_arg(buffer, count, &value);
675 set_lcd_state(value);
679 static int read_brightness(void)
683 if (hotk->methods->brightness_get) { /* SPLV/GPLV laptop */
684 if (!read_acpi_int(hotk->handle, hotk->methods->brightness_get,
687 "Asus ACPI: Error reading brightness\n");
688 } else if (hotk->methods->brightness_status) { /* For D1 for example */
689 if (!read_acpi_int(NULL, hotk->methods->brightness_status,
692 "Asus ACPI: Error reading brightness\n");
693 } else /* No GPLV method */
694 value = hotk->brightness;
699 * Change the brightness level
701 static void set_brightness(int value)
703 acpi_status status = 0;
706 if (hotk->methods->brightness_set) {
707 if (!write_acpi_int(hotk->handle, hotk->methods->brightness_set,
710 "Asus ACPI: Error changing brightness\n");
714 /* No SPLV method if we are here, act as appropriate */
715 value -= read_brightness();
717 status = acpi_evaluate_object(NULL, (value > 0) ?
718 hotk->methods->brightness_up :
719 hotk->methods->brightness_down,
721 (value > 0) ? value-- : value++;
722 if (ACPI_FAILURE(status))
724 "Asus ACPI: Error changing brightness\n");
730 proc_read_brn(char *page, char **start, off_t off, int count, int *eof,
733 return sprintf(page, "%d\n", read_brightness());
737 proc_write_brn(struct file *file, const char __user * buffer,
738 unsigned long count, void *data)
742 count = parse_arg(buffer, count, &value);
744 value = (0 < value) ? ((15 < value) ? 15 : value) : 0;
745 /* 0 <= value <= 15 */
746 set_brightness(value);
747 } else if (count < 0) {
748 printk(KERN_WARNING "Asus ACPI: Error reading user input\n");
754 static void set_display(int value)
756 /* no sanity check needed for now */
757 if (!write_acpi_int(hotk->handle, hotk->methods->display_set,
759 printk(KERN_WARNING "Asus ACPI: Error setting display\n");
764 * Now, *this* one could be more user-friendly, but so far, no-one has
765 * complained. The significance of bits is the same as in proc_write_disp()
768 proc_read_disp(char *page, char **start, off_t off, int count, int *eof,
773 if (!read_acpi_int(hotk->handle, hotk->methods->display_get, &value))
775 "Asus ACPI: Error reading display status\n");
776 value &= 0x07; /* needed for some models, shouldn't hurt others */
777 return sprintf(page, "%d\n", value);
781 * Experimental support for display switching. As of now: 1 should activate
782 * the LCD output, 2 should do for CRT, and 4 for TV-Out. Any combination
783 * (bitwise) of these will suffice. I never actually tested 3 displays hooked up
784 * simultaneously, so be warned. See the acpi4asus README for more info.
787 proc_write_disp(struct file *file, const char __user * buffer,
788 unsigned long count, void *data)
792 count = parse_arg(buffer, count, &value);
796 printk(KERN_WARNING "Asus ACPI: Error reading user input\n");
801 typedef int (proc_readfunc) (char *page, char **start, off_t off, int count,
802 int *eof, void *data);
803 typedef int (proc_writefunc) (struct file * file, const char __user * buffer,
804 unsigned long count, void *data);
807 asus_proc_add(char *name, proc_writefunc * writefunc,
808 proc_readfunc * readfunc, mode_t mode,
809 struct acpi_device *device)
811 struct proc_dir_entry *proc =
812 create_proc_entry(name, mode, acpi_device_dir(device));
814 printk(KERN_WARNING " Unable to create %s fs entry\n", name);
817 proc->write_proc = writefunc;
818 proc->read_proc = readfunc;
819 proc->data = acpi_driver_data(device);
820 proc->owner = THIS_MODULE;
821 proc->uid = asus_uid;
822 proc->gid = asus_gid;
826 static int asus_hotk_add_fs(struct acpi_device *device)
828 struct proc_dir_entry *proc;
832 * If parameter uid or gid is not changed, keep the default setting for
833 * our proc entries (-rw-rw-rw-) else, it means we care about security,
834 * and then set to -rw-rw----
837 if ((asus_uid == 0) && (asus_gid == 0)) {
838 mode = S_IFREG | S_IRUGO | S_IWUGO;
840 mode = S_IFREG | S_IRUSR | S_IRGRP | S_IWUSR | S_IWGRP;
841 printk(KERN_WARNING " asus_uid and asus_gid parameters are "
842 "deprecated, use chown and chmod instead!\n");
845 acpi_device_dir(device) = asus_proc_dir;
846 if (!acpi_device_dir(device))
849 proc = create_proc_entry(PROC_INFO, mode, acpi_device_dir(device));
851 proc->read_proc = proc_read_info;
852 proc->data = acpi_driver_data(device);
853 proc->owner = THIS_MODULE;
854 proc->uid = asus_uid;
855 proc->gid = asus_gid;
857 printk(KERN_WARNING " Unable to create " PROC_INFO
861 if (hotk->methods->mt_wled) {
862 asus_proc_add(PROC_WLED, &proc_write_wled, &proc_read_wled,
866 if (hotk->methods->mt_mled) {
867 asus_proc_add(PROC_MLED, &proc_write_mled, &proc_read_mled,
871 if (hotk->methods->mt_tled) {
872 asus_proc_add(PROC_TLED, &proc_write_tled, &proc_read_tled,
877 * We need both read node and write method as LCD switch is also accessible
880 if (hotk->methods->mt_lcd_switch && hotk->methods->lcd_status) {
881 asus_proc_add(PROC_LCD, &proc_write_lcd, &proc_read_lcd, mode,
885 if ((hotk->methods->brightness_up && hotk->methods->brightness_down) ||
886 (hotk->methods->brightness_get && hotk->methods->brightness_set)) {
887 asus_proc_add(PROC_BRN, &proc_write_brn, &proc_read_brn, mode,
891 if (hotk->methods->display_set) {
892 asus_proc_add(PROC_DISP, &proc_write_disp, &proc_read_disp,
899 static int asus_hotk_remove_fs(struct acpi_device *device)
901 if (acpi_device_dir(device)) {
902 remove_proc_entry(PROC_INFO, acpi_device_dir(device));
903 if (hotk->methods->mt_wled)
904 remove_proc_entry(PROC_WLED, acpi_device_dir(device));
905 if (hotk->methods->mt_mled)
906 remove_proc_entry(PROC_MLED, acpi_device_dir(device));
907 if (hotk->methods->mt_tled)
908 remove_proc_entry(PROC_TLED, acpi_device_dir(device));
909 if (hotk->methods->mt_lcd_switch && hotk->methods->lcd_status)
910 remove_proc_entry(PROC_LCD, acpi_device_dir(device));
911 if ((hotk->methods->brightness_up
912 && hotk->methods->brightness_down)
913 || (hotk->methods->brightness_get
914 && hotk->methods->brightness_set))
915 remove_proc_entry(PROC_BRN, acpi_device_dir(device));
916 if (hotk->methods->display_set)
917 remove_proc_entry(PROC_DISP, acpi_device_dir(device));
922 static void asus_hotk_notify(acpi_handle handle, u32 event, void *data)
924 /* TODO Find a better way to handle events count. */
928 if ((event & ~((u32) BR_UP)) < 16) {
929 hotk->brightness = (event & ~((u32) BR_UP));
930 } else if ((event & ~((u32) BR_DOWN)) < 16) {
931 hotk->brightness = (event & ~((u32) BR_DOWN));
934 acpi_bus_generate_event(hotk->device, event,
935 hotk->event_count[event % 128]++);
941 * This function is used to initialize the hotk with right values. In this
942 * method, we can make all the detection we want, and modify the hotk struct
944 static int asus_hotk_get_info(void)
946 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
947 struct acpi_buffer dsdt = { ACPI_ALLOCATE_BUFFER, NULL };
948 union acpi_object *model = NULL;
953 * Get DSDT headers early enough to allow for differentiating between
954 * models, but late enough to allow acpi_bus_register_driver() to fail
955 * before doing anything ACPI-specific. Should we encounter a machine,
956 * which needs special handling (i.e. its hotkey device has a different
957 * HID), this bit will be moved. A global variable asus_info contains
960 status = acpi_get_table(ACPI_TABLE_ID_DSDT, 1, &dsdt);
961 if (ACPI_FAILURE(status))
962 printk(KERN_WARNING " Couldn't get the DSDT table header\n");
964 asus_info = (struct acpi_table_header *)dsdt.pointer;
966 /* We have to write 0 on init this far for all ASUS models */
967 if (!write_acpi_int(hotk->handle, "INIT", 0, &buffer)) {
968 printk(KERN_ERR " Hotkey initialization failed\n");
972 /* This needs to be called for some laptops to init properly */
973 if (!read_acpi_int(hotk->handle, "BSTS", &bsts_result))
974 printk(KERN_WARNING " Error calling BSTS\n");
975 else if (bsts_result)
976 printk(KERN_NOTICE " BSTS called, 0x%02x returned\n",
979 /* This is unlikely with implicit return */
980 if (buffer.pointer == NULL)
983 model = (union acpi_object *)buffer.pointer;
985 * Samsung P30 has a device with a valid _HID whose INIT does not
986 * return anything. It used to be possible to catch this exception,
987 * but the implicit return code will now happily confuse the
988 * driver. We assume that every ACPI_TYPE_STRING is a valid model
989 * identifier but it's still possible to get completely bogus data.
991 if (model->type == ACPI_TYPE_STRING) {
992 printk(KERN_NOTICE " %s model detected, ",
993 model->string.pointer);
995 if (asus_info && /* Samsung P30 */
996 strncmp(asus_info->oem_table_id, "ODEM", 4) == 0) {
999 " Samsung P30 detected, supported\n");
1002 printk(KERN_WARNING " no string returned by INIT\n");
1003 printk(KERN_WARNING " trying default values, supply "
1004 "the developers with your DSDT\n");
1006 hotk->methods = &model_conf[hotk->model];
1013 hotk->model = END_MODEL;
1014 if (strncmp(model->string.pointer, "L3D", 3) == 0)
1016 else if (strncmp(model->string.pointer, "L3H", 3) == 0 ||
1017 strncmp(model->string.pointer, "L2E", 3) == 0)
1019 else if (strncmp(model->string.pointer, "L3", 2) == 0 ||
1020 strncmp(model->string.pointer, "L2B", 3) == 0)
1022 else if (strncmp(model->string.pointer, "L8L", 3) == 0)
1024 else if (strncmp(model->string.pointer, "L4R", 3) == 0)
1026 else if (strncmp(model->string.pointer, "M6N", 3) == 0)
1028 else if (strncmp(model->string.pointer, "M6R", 3) == 0)
1030 else if (strncmp(model->string.pointer, "M2N", 3) == 0 ||
1031 strncmp(model->string.pointer, "M3N", 3) == 0 ||
1032 strncmp(model->string.pointer, "M5N", 3) == 0 ||
1033 strncmp(model->string.pointer, "M6N", 3) == 0 ||
1034 strncmp(model->string.pointer, "S1N", 3) == 0 ||
1035 strncmp(model->string.pointer, "S5N", 3) == 0 ||
1036 strncmp(model->string.pointer, "W1N", 3) == 0)
1038 else if (strncmp(model->string.pointer, "M1", 2) == 0)
1040 else if (strncmp(model->string.pointer, "M2", 2) == 0 ||
1041 strncmp(model->string.pointer, "L4E", 3) == 0)
1043 else if (strncmp(model->string.pointer, "L2", 2) == 0)
1045 else if (strncmp(model->string.pointer, "L8", 2) == 0)
1047 else if (strncmp(model->string.pointer, "D1", 2) == 0)
1049 else if (strncmp(model->string.pointer, "A1", 2) == 0)
1051 else if (strncmp(model->string.pointer, "A2", 2) == 0)
1053 else if (strncmp(model->string.pointer, "J1", 2) == 0)
1055 else if (strncmp(model->string.pointer, "L5", 2) == 0)
1058 if (hotk->model == END_MODEL) {
1059 printk("unsupported, trying default values, supply the "
1060 "developers with your DSDT\n");
1063 printk("supported\n");
1066 hotk->methods = &model_conf[hotk->model];
1068 /* Sort of per-model blacklist */
1069 if (strncmp(model->string.pointer, "L2B", 3) == 0)
1070 hotk->methods->lcd_status = NULL;
1071 /* L2B is similar enough to L3C to use its settings, with this only
1073 else if (strncmp(model->string.pointer, "S5N", 3) == 0 ||
1074 strncmp(model->string.pointer, "M5N", 3) == 0)
1075 hotk->methods->mt_mled = NULL;
1076 /* S5N and M5N have no MLED */
1077 else if (strncmp(model->string.pointer, "M2N", 3) == 0 ||
1078 strncmp(model->string.pointer, "W1N", 3) == 0)
1079 hotk->methods->mt_wled = "WLED";
1080 /* M2N and W1N have a usable WLED */
1081 else if (asus_info) {
1082 if (strncmp(asus_info->oem_table_id, "L1", 2) == 0)
1083 hotk->methods->mled_status = NULL;
1084 /* S1300A reports L84F, but L1400B too, account for that */
1092 static int asus_hotk_check(void)
1096 result = acpi_bus_get_status(hotk->device);
1100 if (hotk->device->status.present) {
1101 result = asus_hotk_get_info();
1103 printk(KERN_ERR " Hotkey device not present, aborting\n");
1110 static int asus_hotk_found;
1112 static int asus_hotk_add(struct acpi_device *device)
1114 acpi_status status = AE_OK;
1120 printk(KERN_NOTICE "Asus Laptop ACPI Extras version %s\n",
1124 (struct asus_hotk *)kmalloc(sizeof(struct asus_hotk), GFP_KERNEL);
1127 memset(hotk, 0, sizeof(struct asus_hotk));
1129 hotk->handle = device->handle;
1130 strcpy(acpi_device_name(device), ACPI_HOTK_DEVICE_NAME);
1131 strcpy(acpi_device_class(device), ACPI_HOTK_CLASS);
1132 acpi_driver_data(device) = hotk;
1133 hotk->device = device;
1135 result = asus_hotk_check();
1139 result = asus_hotk_add_fs(device);
1144 * We install the handler, it will receive the hotk in parameter, so, we
1145 * could add other data to the hotk struct
1147 status = acpi_install_notify_handler(hotk->handle, ACPI_SYSTEM_NOTIFY,
1148 asus_hotk_notify, hotk);
1149 if (ACPI_FAILURE(status))
1150 printk(KERN_ERR " Error installing notify handler\n");
1152 /* For laptops without GPLV: init the hotk->brightness value */
1153 if ((!hotk->methods->brightness_get)
1154 && (!hotk->methods->brightness_status)
1155 && (hotk->methods->brightness_up && hotk->methods->brightness_down)) {
1157 acpi_evaluate_object(NULL, hotk->methods->brightness_down,
1159 if (ACPI_FAILURE(status))
1160 printk(KERN_WARNING " Error changing brightness\n");
1163 acpi_evaluate_object(NULL,
1164 hotk->methods->brightness_up,
1166 if (ACPI_FAILURE(status))
1167 printk(KERN_WARNING " Strange, error changing"
1172 asus_hotk_found = 1;
1182 static int asus_hotk_remove(struct acpi_device *device, int type)
1184 acpi_status status = 0;
1186 if (!device || !acpi_driver_data(device))
1189 status = acpi_remove_notify_handler(hotk->handle, ACPI_SYSTEM_NOTIFY,
1191 if (ACPI_FAILURE(status))
1192 printk(KERN_ERR "Asus ACPI: Error removing notify handler\n");
1194 asus_hotk_remove_fs(device);
1201 static int __init asus_acpi_init(void)
1208 if (!acpi_specific_hotkey_enabled) {
1209 printk(KERN_ERR "Using generic hotkey driver\n");
1212 asus_proc_dir = proc_mkdir(PROC_ASUS, acpi_root_dir);
1213 if (!asus_proc_dir) {
1214 printk(KERN_ERR "Asus ACPI: Unable to create /proc entry\n");
1217 asus_proc_dir->owner = THIS_MODULE;
1219 result = acpi_bus_register_driver(&asus_hotk_driver);
1221 remove_proc_entry(PROC_ASUS, acpi_root_dir);
1226 * This is a bit of a kludge. We only want this module loaded
1227 * for ASUS systems, but there's currently no way to probe the
1228 * ACPI namespace for ASUS HIDs. So we just return failure if
1229 * we didn't find one, which will cause the module to be
1232 if (!asus_hotk_found) {
1233 acpi_bus_unregister_driver(&asus_hotk_driver);
1234 remove_proc_entry(PROC_ASUS, acpi_root_dir);
1241 static void __exit asus_acpi_exit(void)
1243 acpi_bus_unregister_driver(&asus_hotk_driver);
1244 remove_proc_entry(PROC_ASUS, acpi_root_dir);
1251 module_init(asus_acpi_init);
1252 module_exit(asus_acpi_exit);