2 * asus-laptop.c - Asus Laptop Support
5 * Copyright (C) 2002-2005 Julien Lerouge, 2003-2006 Karol Kozimor
6 * Copyright (C) 2006-2007 Corentin Chary
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23 * The development page for this driver is located at
24 * http://sourceforge.net/projects/acpi4asus/
27 * Pontus Fuchs - Helper functions, cleanup
28 * Johann Wiesner - Small compile fixes
29 * John Belmonte - ACPI code for Toshiba laptop was a good starting point.
30 * Eric Burghard - LED display support for W1N
31 * Josh Green - Light Sens support
32 * Thomas Tuttle - His first patch for led support was very helpfull
33 * Sam Lin - GPS support
36 #include <linux/autoconf.h>
37 #include <linux/kernel.h>
38 #include <linux/module.h>
39 #include <linux/init.h>
40 #include <linux/types.h>
41 #include <linux/err.h>
42 #include <linux/proc_fs.h>
43 #include <linux/backlight.h>
45 #include <linux/leds.h>
46 #include <linux/platform_device.h>
47 #include <acpi/acpi_drivers.h>
48 #include <acpi/acpi_bus.h>
49 #include <asm/uaccess.h>
51 #define ASUS_LAPTOP_VERSION "0.42"
53 #define ASUS_HOTK_NAME "Asus Laptop Support"
54 #define ASUS_HOTK_CLASS "hotkey"
55 #define ASUS_HOTK_DEVICE_NAME "Hotkey"
56 #define ASUS_HOTK_FILE "asus-laptop"
57 #define ASUS_HOTK_PREFIX "\\_SB.ATKD."
60 * Some events we use, same for all Asus
62 #define ATKD_BR_UP 0x10
63 #define ATKD_BR_DOWN 0x20
64 #define ATKD_LCD_ON 0x33
65 #define ATKD_LCD_OFF 0x34
68 * Known bits returned by \_SB.ATKD.HWRS
74 * Flags for hotk status
75 * WL_ON and BT_ON are also used for wireless_status()
77 #define WL_ON 0x01 //internal Wifi
78 #define BT_ON 0x02 //internal Bluetooth
79 #define MLED_ON 0x04 //mail LED
80 #define TLED_ON 0x08 //touchpad LED
81 #define RLED_ON 0x10 //Record LED
82 #define PLED_ON 0x20 //Phone LED
83 #define GLED_ON 0x40 //Gaming LED
84 #define LCD_ON 0x80 //LCD backlight
85 #define GPS_ON 0x100 //GPS
87 #define ASUS_LOG ASUS_HOTK_FILE ": "
88 #define ASUS_ERR KERN_ERR ASUS_LOG
89 #define ASUS_WARNING KERN_WARNING ASUS_LOG
90 #define ASUS_NOTICE KERN_NOTICE ASUS_LOG
91 #define ASUS_INFO KERN_INFO ASUS_LOG
92 #define ASUS_DEBUG KERN_DEBUG ASUS_LOG
94 MODULE_AUTHOR("Julien Lerouge, Karol Kozimor, Corentin Chary");
95 MODULE_DESCRIPTION(ASUS_HOTK_NAME);
96 MODULE_LICENSE("GPL");
98 /* WAPF defines the behavior of the Fn+Fx wlan key
99 * The significance of values is yet to be found, but
101 * 0x0 will do nothing
102 * 0x1 will allow to control the device with Fn+Fx key.
103 * 0x4 will send an ACPI event (0x88) while pressing the Fn+Fx key
104 * 0x5 like 0x1 or 0x4
105 * So, if something doesn't work as you want, just try other values =)
107 static uint wapf = 1;
108 module_param(wapf, uint, 0644);
109 MODULE_PARM_DESC(wapf, "WAPF value");
111 #define ASUS_HANDLE(object, paths...) \
112 static acpi_handle object##_handle = NULL; \
113 static char *object##_paths[] = { paths }
116 ASUS_HANDLE(mled_set, ASUS_HOTK_PREFIX "MLED");
117 ASUS_HANDLE(tled_set, ASUS_HOTK_PREFIX "TLED");
118 ASUS_HANDLE(rled_set, ASUS_HOTK_PREFIX "RLED"); /* W1JC */
119 ASUS_HANDLE(pled_set, ASUS_HOTK_PREFIX "PLED"); /* A7J */
120 ASUS_HANDLE(gled_set, ASUS_HOTK_PREFIX "GLED"); /* G1, G2 (probably) */
123 ASUS_HANDLE(ledd_set, ASUS_HOTK_PREFIX "SLCM");
125 /* Bluetooth and WLAN
126 * WLED and BLED are not handled like other XLED, because in some dsdt
127 * they also control the WLAN/Bluetooth device.
129 ASUS_HANDLE(wl_switch, ASUS_HOTK_PREFIX "WLED");
130 ASUS_HANDLE(bt_switch, ASUS_HOTK_PREFIX "BLED");
131 ASUS_HANDLE(wireless_status, ASUS_HOTK_PREFIX "RSTS"); /* All new models */
134 ASUS_HANDLE(brightness_set, ASUS_HOTK_PREFIX "SPLV");
135 ASUS_HANDLE(brightness_get, ASUS_HOTK_PREFIX "GPLV");
138 ASUS_HANDLE(lcd_switch, "\\_SB.PCI0.SBRG.EC0._Q10", /* All new models */
139 "\\_SB.PCI0.ISA.EC0._Q10", /* A1x */
140 "\\_SB.PCI0.PX40.ECD0._Q10", /* L3C */
141 "\\_SB.PCI0.PX40.EC0.Q10", /* M1A */
142 "\\_SB.PCI0.LPCB.EC0._Q10", /* P30 */
143 "\\_SB.PCI0.PX40.Q10", /* S1x */
144 "\\Q10"); /* A2x, L2D, L3D, M2E */
147 ASUS_HANDLE(display_set, ASUS_HOTK_PREFIX "SDSP");
148 ASUS_HANDLE(display_get, "\\_SB.PCI0.P0P1.VGA.GETD", /* A6B, A6K A6R A7D F3JM L4R M6R A3G
149 M6A M6V VX-1 V6J V6V W3Z */
150 "\\_SB.PCI0.P0P2.VGA.GETD", /* A3E A4K, A4D A4L A6J A7J A8J Z71V M9V
151 S5A M5A z33A W1Jc W2V G1 */
152 "\\_SB.PCI0.P0P3.VGA.GETD", /* A6V A6Q */
153 "\\_SB.PCI0.P0PA.VGA.GETD", /* A6T, A6M */
154 "\\_SB.PCI0.PCI1.VGAC.NMAP", /* L3C */
155 "\\_SB.PCI0.VGA.GETD", /* Z96F */
157 "\\ADVG", /* A4G Z71A W1N W5A W5F M2N M3N M5N M6N S1N S5N */
159 "\\INFB", /* A2H D1 L2D L3D L3H L2E L5D L5C M1A M2E L4L W3V */
160 "\\SSTE"); /* A3F A6F A3N A3L M6N W3N W6A */
162 ASUS_HANDLE(ls_switch, ASUS_HOTK_PREFIX "ALSC"); /* Z71A Z71V */
163 ASUS_HANDLE(ls_level, ASUS_HOTK_PREFIX "ALSL"); /* Z71A Z71V */
166 /* R2H use different handle for GPS on/off */
167 ASUS_HANDLE(gps_on, ASUS_HOTK_PREFIX "SDON"); /* R2H */
168 ASUS_HANDLE(gps_off, ASUS_HOTK_PREFIX "SDOF"); /* R2H */
169 ASUS_HANDLE(gps_status, ASUS_HOTK_PREFIX "GPST");
172 * This is the main structure, we can use it to store anything interesting
173 * about the hotk device
176 char *name; //laptop name
177 struct acpi_device *device; //the device we are in
178 acpi_handle handle; //the handle of the hotk device
179 char status; //status of the hotk, for LEDs, ...
180 u32 ledd_status; //status of the LED display
181 u8 light_level; //light sensor level
182 u8 light_switch; //light sensor switch value
183 u16 event_count[128]; //count for each event TODO make this better
187 * This header is made available to allow proper configuration given model,
188 * revision number , ... this info cannot go in struct asus_hotk because it is
189 * available before the hotk
191 static struct acpi_table_header *asus_info;
193 /* The actual device the driver binds to */
194 static struct asus_hotk *hotk;
197 * The hotkey driver declaration
199 static const struct acpi_device_id asus_device_ids[] = {
203 MODULE_DEVICE_TABLE(acpi, asus_device_ids);
205 static int asus_hotk_add(struct acpi_device *device);
206 static int asus_hotk_remove(struct acpi_device *device, int type);
207 static struct acpi_driver asus_hotk_driver = {
208 .name = ASUS_HOTK_NAME,
209 .class = ASUS_HOTK_CLASS,
210 .ids = asus_device_ids,
212 .add = asus_hotk_add,
213 .remove = asus_hotk_remove,
217 /* The backlight device /sys/class/backlight */
218 static struct backlight_device *asus_backlight_device;
221 * The backlight class declaration
223 static int read_brightness(struct backlight_device *bd);
224 static int update_bl_status(struct backlight_device *bd);
225 static struct backlight_ops asusbl_ops = {
226 .get_brightness = read_brightness,
227 .update_status = update_bl_status,
230 /* These functions actually update the LED's, and are called from a
231 * workqueue. By doing this as separate work rather than when the LED
232 * subsystem asks, we avoid messing with the Asus ACPI stuff during a
233 * potentially bad time, such as a timer interrupt. */
234 static struct workqueue_struct *led_workqueue;
236 #define ASUS_LED(object, ledname) \
237 static void object##_led_set(struct led_classdev *led_cdev, \
238 enum led_brightness value); \
239 static void object##_led_update(struct work_struct *ignored); \
240 static int object##_led_wk; \
241 static DECLARE_WORK(object##_led_work, object##_led_update); \
242 static struct led_classdev object##_led = { \
243 .name = "asus:" ledname, \
244 .brightness_set = object##_led_set, \
247 ASUS_LED(mled, "mail");
248 ASUS_LED(tled, "touchpad");
249 ASUS_LED(rled, "record");
250 ASUS_LED(pled, "phone");
251 ASUS_LED(gled, "gaming");
254 * This function evaluates an ACPI method, given an int as parameter, the
255 * method is searched within the scope of the handle, can be NULL. The output
256 * of the method is written is output, which can also be NULL
258 * returns 1 if write is successful, 0 else.
260 static int write_acpi_int(acpi_handle handle, const char *method, int val,
261 struct acpi_buffer *output)
263 struct acpi_object_list params; //list of input parameters (an int here)
264 union acpi_object in_obj; //the only param we use
268 params.pointer = &in_obj;
269 in_obj.type = ACPI_TYPE_INTEGER;
270 in_obj.integer.value = val;
272 status = acpi_evaluate_object(handle, (char *)method, ¶ms, output);
273 return (status == AE_OK);
276 static int read_wireless_status(int mask)
279 acpi_status rv = AE_OK;
281 if (!wireless_status_handle)
282 return (hotk->status & mask) ? 1 : 0;
284 rv = acpi_evaluate_integer(wireless_status_handle, NULL, NULL, &status);
285 if (ACPI_FAILURE(rv))
286 printk(ASUS_WARNING "Error reading Wireless status\n");
288 return (status & mask) ? 1 : 0;
290 return (hotk->status & mask) ? 1 : 0;
293 static int read_gps_status(void)
296 acpi_status rv = AE_OK;
298 rv = acpi_evaluate_integer(gps_status_handle, NULL, NULL, &status);
299 if (ACPI_FAILURE(rv))
300 printk(ASUS_WARNING "Error reading GPS status\n");
302 return status ? 1 : 0;
304 return (hotk->status & GPS_ON) ? 1 : 0;
307 /* Generic LED functions */
308 static int read_status(int mask)
310 /* There is a special method for both wireless devices */
311 if (mask == BT_ON || mask == WL_ON)
312 return read_wireless_status(mask);
313 else if (mask == GPS_ON)
314 return read_gps_status();
316 return (hotk->status & mask) ? 1 : 0;
319 static void write_status(acpi_handle handle, int out, int mask)
321 hotk->status = (out) ? (hotk->status | mask) : (hotk->status & ~mask);
328 out = (out & 0x1) + 1;
331 handle = (out) ? gps_on_handle : gps_off_handle;
339 if (handle && !write_acpi_int(handle, NULL, out, NULL))
340 printk(ASUS_WARNING " write failed %x\n", mask);
343 /* /sys/class/led handlers */
344 #define ASUS_LED_HANDLER(object, mask) \
345 static void object##_led_set(struct led_classdev *led_cdev, \
346 enum led_brightness value) \
348 object##_led_wk = value; \
349 queue_work(led_workqueue, &object##_led_work); \
351 static void object##_led_update(struct work_struct *ignored) \
353 int value = object##_led_wk; \
354 write_status(object##_set_handle, value, (mask)); \
357 ASUS_LED_HANDLER(mled, MLED_ON);
358 ASUS_LED_HANDLER(pled, PLED_ON);
359 ASUS_LED_HANDLER(rled, RLED_ON);
360 ASUS_LED_HANDLER(tled, TLED_ON);
361 ASUS_LED_HANDLER(gled, GLED_ON);
363 static int get_lcd_state(void)
365 return read_status(LCD_ON);
368 static int set_lcd_state(int value)
371 acpi_status status = 0;
375 if (lcd == get_lcd_state())
378 if (lcd_switch_handle) {
379 status = acpi_evaluate_object(lcd_switch_handle,
382 if (ACPI_FAILURE(status))
383 printk(ASUS_WARNING "Error switching LCD\n");
386 write_status(NULL, lcd, LCD_ON);
390 static void lcd_blank(int blank)
392 struct backlight_device *bd = asus_backlight_device;
395 bd->props.power = blank;
396 backlight_update_status(bd);
400 static int read_brightness(struct backlight_device *bd)
403 acpi_status rv = AE_OK;
405 rv = acpi_evaluate_integer(brightness_get_handle, NULL, NULL, &value);
406 if (ACPI_FAILURE(rv))
407 printk(ASUS_WARNING "Error reading brightness\n");
412 static int set_brightness(struct backlight_device *bd, int value)
416 value = (0 < value) ? ((15 < value) ? 15 : value) : 0;
417 /* 0 <= value <= 15 */
419 if (!write_acpi_int(brightness_set_handle, NULL, value, NULL)) {
420 printk(ASUS_WARNING "Error changing brightness\n");
427 static int update_bl_status(struct backlight_device *bd)
430 int value = bd->props.brightness;
432 rv = set_brightness(bd, value);
436 value = (bd->props.power == FB_BLANK_UNBLANK) ? 1 : 0;
437 return set_lcd_state(value);
441 * Platform device handlers
445 * We write our info in page, we begin at offset off and cannot write more
446 * than count bytes. We set eof to 1 if we handle those 2 values. We return the
447 * number of bytes written in page
449 static ssize_t show_infos(struct device *dev,
450 struct device_attribute *attr, char *page)
454 char buf[16]; //enough for all info
455 acpi_status rv = AE_OK;
458 * We use the easy way, we don't care of off and count, so we don't set eof
462 len += sprintf(page, ASUS_HOTK_NAME " " ASUS_LAPTOP_VERSION "\n");
463 len += sprintf(page + len, "Model reference : %s\n", hotk->name);
465 * The SFUN method probably allows the original driver to get the list
466 * of features supported by a given model. For now, 0x0100 or 0x0800
467 * bit signifies that the laptop is equipped with a Wi-Fi MiniPCI card.
468 * The significance of others is yet to be found.
470 rv = acpi_evaluate_integer(hotk->handle, "SFUN", NULL, &temp);
471 if (!ACPI_FAILURE(rv))
472 len += sprintf(page + len, "SFUN value : 0x%04x\n",
475 * Another value for userspace: the ASYM method returns 0x02 for
476 * battery low and 0x04 for battery critical, its readings tend to be
477 * more accurate than those provided by _BST.
478 * Note: since not all the laptops provide this method, errors are
481 rv = acpi_evaluate_integer(hotk->handle, "ASYM", NULL, &temp);
482 if (!ACPI_FAILURE(rv))
483 len += sprintf(page + len, "ASYM value : 0x%04x\n",
486 snprintf(buf, 16, "%d", asus_info->length);
487 len += sprintf(page + len, "DSDT length : %s\n", buf);
488 snprintf(buf, 16, "%d", asus_info->checksum);
489 len += sprintf(page + len, "DSDT checksum : %s\n", buf);
490 snprintf(buf, 16, "%d", asus_info->revision);
491 len += sprintf(page + len, "DSDT revision : %s\n", buf);
492 snprintf(buf, 7, "%s", asus_info->oem_id);
493 len += sprintf(page + len, "OEM id : %s\n", buf);
494 snprintf(buf, 9, "%s", asus_info->oem_table_id);
495 len += sprintf(page + len, "OEM table id : %s\n", buf);
496 snprintf(buf, 16, "%x", asus_info->oem_revision);
497 len += sprintf(page + len, "OEM revision : 0x%s\n", buf);
498 snprintf(buf, 5, "%s", asus_info->asl_compiler_id);
499 len += sprintf(page + len, "ASL comp vendor id : %s\n", buf);
500 snprintf(buf, 16, "%x", asus_info->asl_compiler_revision);
501 len += sprintf(page + len, "ASL comp revision : 0x%s\n", buf);
507 static int parse_arg(const char *buf, unsigned long count, int *val)
513 if (sscanf(buf, "%i", val) != 1)
518 static ssize_t store_status(const char *buf, size_t count,
519 acpi_handle handle, int mask)
524 rv = parse_arg(buf, count, &value);
528 write_status(handle, out, mask);
536 static ssize_t show_ledd(struct device *dev,
537 struct device_attribute *attr, char *buf)
539 return sprintf(buf, "0x%08x\n", hotk->ledd_status);
542 static ssize_t store_ledd(struct device *dev, struct device_attribute *attr,
543 const char *buf, size_t count)
547 rv = parse_arg(buf, count, &value);
549 if (!write_acpi_int(ledd_set_handle, NULL, value, NULL))
550 printk(ASUS_WARNING "LED display write failed\n");
552 hotk->ledd_status = (u32) value;
560 static ssize_t show_wlan(struct device *dev,
561 struct device_attribute *attr, char *buf)
563 return sprintf(buf, "%d\n", read_status(WL_ON));
566 static ssize_t store_wlan(struct device *dev, struct device_attribute *attr,
567 const char *buf, size_t count)
569 return store_status(buf, count, wl_switch_handle, WL_ON);
575 static ssize_t show_bluetooth(struct device *dev,
576 struct device_attribute *attr, char *buf)
578 return sprintf(buf, "%d\n", read_status(BT_ON));
581 static ssize_t store_bluetooth(struct device *dev,
582 struct device_attribute *attr, const char *buf,
585 return store_status(buf, count, bt_switch_handle, BT_ON);
591 static void set_display(int value)
593 /* no sanity check needed for now */
594 if (!write_acpi_int(display_set_handle, NULL, value, NULL))
595 printk(ASUS_WARNING "Error setting display\n");
599 static int read_display(void)
602 acpi_status rv = AE_OK;
604 /* In most of the case, we know how to set the display, but sometime
606 if (display_get_handle) {
607 rv = acpi_evaluate_integer(display_get_handle, NULL,
609 if (ACPI_FAILURE(rv))
610 printk(ASUS_WARNING "Error reading display status\n");
613 value &= 0x0F; /* needed for some models, shouldn't hurt others */
619 * Now, *this* one could be more user-friendly, but so far, no-one has
620 * complained. The significance of bits is the same as in store_disp()
622 static ssize_t show_disp(struct device *dev,
623 struct device_attribute *attr, char *buf)
625 return sprintf(buf, "%d\n", read_display());
629 * Experimental support for display switching. As of now: 1 should activate
630 * the LCD output, 2 should do for CRT, 4 for TV-Out and 8 for DVI.
631 * Any combination (bitwise) of these will suffice. I never actually tested 4
632 * displays hooked up simultaneously, so be warned. See the acpi4asus README
635 static ssize_t store_disp(struct device *dev, struct device_attribute *attr,
636 const char *buf, size_t count)
640 rv = parse_arg(buf, count, &value);
649 static void set_light_sens_switch(int value)
651 if (!write_acpi_int(ls_switch_handle, NULL, value, NULL))
652 printk(ASUS_WARNING "Error setting light sensor switch\n");
653 hotk->light_switch = value;
656 static ssize_t show_lssw(struct device *dev,
657 struct device_attribute *attr, char *buf)
659 return sprintf(buf, "%d\n", hotk->light_switch);
662 static ssize_t store_lssw(struct device *dev, struct device_attribute *attr,
663 const char *buf, size_t count)
667 rv = parse_arg(buf, count, &value);
669 set_light_sens_switch(value ? 1 : 0);
674 static void set_light_sens_level(int value)
676 if (!write_acpi_int(ls_level_handle, NULL, value, NULL))
677 printk(ASUS_WARNING "Error setting light sensor level\n");
678 hotk->light_level = value;
681 static ssize_t show_lslvl(struct device *dev,
682 struct device_attribute *attr, char *buf)
684 return sprintf(buf, "%d\n", hotk->light_level);
687 static ssize_t store_lslvl(struct device *dev, struct device_attribute *attr,
688 const char *buf, size_t count)
692 rv = parse_arg(buf, count, &value);
694 value = (0 < value) ? ((15 < value) ? 15 : value) : 0;
695 /* 0 <= value <= 15 */
696 set_light_sens_level(value);
705 static ssize_t show_gps(struct device *dev,
706 struct device_attribute *attr, char *buf)
708 return sprintf(buf, "%d\n", read_status(GPS_ON));
711 static ssize_t store_gps(struct device *dev, struct device_attribute *attr,
712 const char *buf, size_t count)
714 return store_status(buf, count, NULL, GPS_ON);
717 static void asus_hotk_notify(acpi_handle handle, u32 event, void *data)
719 /* TODO Find a better way to handle events count. */
724 * We need to tell the backlight device when the backlight power is
727 if (event == ATKD_LCD_ON) {
728 write_status(NULL, 1, LCD_ON);
729 lcd_blank(FB_BLANK_UNBLANK);
730 } else if (event == ATKD_LCD_OFF) {
731 write_status(NULL, 0, LCD_ON);
732 lcd_blank(FB_BLANK_POWERDOWN);
735 acpi_bus_generate_event(hotk->device, event,
736 hotk->event_count[event % 128]++);
741 #define ASUS_CREATE_DEVICE_ATTR(_name) \
742 struct device_attribute dev_attr_##_name = { \
744 .name = __stringify(_name), \
750 #define ASUS_SET_DEVICE_ATTR(_name, _mode, _show, _store) \
752 dev_attr_##_name.attr.mode = _mode; \
753 dev_attr_##_name.show = _show; \
754 dev_attr_##_name.store = _store; \
757 static ASUS_CREATE_DEVICE_ATTR(infos);
758 static ASUS_CREATE_DEVICE_ATTR(wlan);
759 static ASUS_CREATE_DEVICE_ATTR(bluetooth);
760 static ASUS_CREATE_DEVICE_ATTR(display);
761 static ASUS_CREATE_DEVICE_ATTR(ledd);
762 static ASUS_CREATE_DEVICE_ATTR(ls_switch);
763 static ASUS_CREATE_DEVICE_ATTR(ls_level);
764 static ASUS_CREATE_DEVICE_ATTR(gps);
766 static struct attribute *asuspf_attributes[] = {
767 &dev_attr_infos.attr,
769 &dev_attr_bluetooth.attr,
770 &dev_attr_display.attr,
772 &dev_attr_ls_switch.attr,
773 &dev_attr_ls_level.attr,
778 static struct attribute_group asuspf_attribute_group = {
779 .attrs = asuspf_attributes
782 static struct platform_driver asuspf_driver = {
784 .name = ASUS_HOTK_FILE,
785 .owner = THIS_MODULE,
789 static struct platform_device *asuspf_device;
791 static void asus_hotk_add_fs(void)
793 ASUS_SET_DEVICE_ATTR(infos, 0444, show_infos, NULL);
795 if (wl_switch_handle)
796 ASUS_SET_DEVICE_ATTR(wlan, 0644, show_wlan, store_wlan);
798 if (bt_switch_handle)
799 ASUS_SET_DEVICE_ATTR(bluetooth, 0644,
800 show_bluetooth, store_bluetooth);
802 if (display_set_handle && display_get_handle)
803 ASUS_SET_DEVICE_ATTR(display, 0644, show_disp, store_disp);
804 else if (display_set_handle)
805 ASUS_SET_DEVICE_ATTR(display, 0200, NULL, store_disp);
808 ASUS_SET_DEVICE_ATTR(ledd, 0644, show_ledd, store_ledd);
810 if (ls_switch_handle && ls_level_handle) {
811 ASUS_SET_DEVICE_ATTR(ls_level, 0644, show_lslvl, store_lslvl);
812 ASUS_SET_DEVICE_ATTR(ls_switch, 0644, show_lssw, store_lssw);
815 if (gps_status_handle && gps_on_handle && gps_off_handle)
816 ASUS_SET_DEVICE_ATTR(gps, 0644, show_gps, store_gps);
819 static int asus_handle_init(char *name, acpi_handle * handle,
820 char **paths, int num_paths)
825 for (i = 0; i < num_paths; i++) {
826 status = acpi_get_handle(NULL, paths[i], handle);
827 if (ACPI_SUCCESS(status))
835 #define ASUS_HANDLE_INIT(object) \
836 asus_handle_init(#object, &object##_handle, object##_paths, \
837 ARRAY_SIZE(object##_paths))
840 * This function is used to initialize the hotk with right values. In this
841 * method, we can make all the detection we want, and modify the hotk struct
843 static int asus_hotk_get_info(void)
845 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
846 union acpi_object *model = NULL;
847 ulong bsts_result, hwrs_result;
852 * Get DSDT headers early enough to allow for differentiating between
853 * models, but late enough to allow acpi_bus_register_driver() to fail
854 * before doing anything ACPI-specific. Should we encounter a machine,
855 * which needs special handling (i.e. its hotkey device has a different
856 * HID), this bit will be moved. A global variable asus_info contains
859 status = acpi_get_table(ACPI_SIG_DSDT, 1, &asus_info);
860 if (ACPI_FAILURE(status))
861 printk(ASUS_WARNING "Couldn't get the DSDT table header\n");
863 /* We have to write 0 on init this far for all ASUS models */
864 if (!write_acpi_int(hotk->handle, "INIT", 0, &buffer)) {
865 printk(ASUS_ERR "Hotkey initialization failed\n");
869 /* This needs to be called for some laptops to init properly */
871 acpi_evaluate_integer(hotk->handle, "BSTS", NULL, &bsts_result);
872 if (ACPI_FAILURE(status))
873 printk(ASUS_WARNING "Error calling BSTS\n");
874 else if (bsts_result)
875 printk(ASUS_NOTICE "BSTS called, 0x%02x returned\n",
879 write_acpi_int(hotk->handle, "CWAP", wapf, NULL);
882 * Try to match the object returned by INIT to the specific model.
883 * Handle every possible object (or the lack of thereof) the DSDT
884 * writers might throw at us. When in trouble, we pass NULL to
885 * asus_model_match() and try something completely different.
887 if (buffer.pointer) {
888 model = buffer.pointer;
889 switch (model->type) {
890 case ACPI_TYPE_STRING:
891 string = model->string.pointer;
893 case ACPI_TYPE_BUFFER:
894 string = model->buffer.pointer;
901 hotk->name = kstrdup(string, GFP_KERNEL);
906 printk(ASUS_NOTICE " %s model detected\n", string);
908 ASUS_HANDLE_INIT(mled_set);
909 ASUS_HANDLE_INIT(tled_set);
910 ASUS_HANDLE_INIT(rled_set);
911 ASUS_HANDLE_INIT(pled_set);
912 ASUS_HANDLE_INIT(gled_set);
914 ASUS_HANDLE_INIT(ledd_set);
917 * The HWRS method return informations about the hardware.
918 * 0x80 bit is for WLAN, 0x100 for Bluetooth.
919 * The significance of others is yet to be found.
920 * If we don't find the method, we assume the device are present.
923 acpi_evaluate_integer(hotk->handle, "HRWS", NULL, &hwrs_result);
924 if (ACPI_FAILURE(status))
925 hwrs_result = WL_HWRS | BT_HWRS;
927 if (hwrs_result & WL_HWRS)
928 ASUS_HANDLE_INIT(wl_switch);
929 if (hwrs_result & BT_HWRS)
930 ASUS_HANDLE_INIT(bt_switch);
932 ASUS_HANDLE_INIT(wireless_status);
934 ASUS_HANDLE_INIT(brightness_set);
935 ASUS_HANDLE_INIT(brightness_get);
937 ASUS_HANDLE_INIT(lcd_switch);
939 ASUS_HANDLE_INIT(display_set);
940 ASUS_HANDLE_INIT(display_get);
942 /* There is a lot of models with "ALSL", but a few get
943 a real light sens, so we need to check it. */
944 if (!ASUS_HANDLE_INIT(ls_switch))
945 ASUS_HANDLE_INIT(ls_level);
947 ASUS_HANDLE_INIT(gps_on);
948 ASUS_HANDLE_INIT(gps_off);
949 ASUS_HANDLE_INIT(gps_status);
956 static int asus_hotk_check(void)
960 result = acpi_bus_get_status(hotk->device);
964 if (hotk->device->status.present) {
965 result = asus_hotk_get_info();
967 printk(ASUS_ERR "Hotkey device not present, aborting\n");
974 static int asus_hotk_found;
976 static int asus_hotk_add(struct acpi_device *device)
978 acpi_status status = AE_OK;
984 printk(ASUS_NOTICE "Asus Laptop Support version %s\n",
985 ASUS_LAPTOP_VERSION);
987 hotk = kzalloc(sizeof(struct asus_hotk), GFP_KERNEL);
991 hotk->handle = device->handle;
992 strcpy(acpi_device_name(device), ASUS_HOTK_DEVICE_NAME);
993 strcpy(acpi_device_class(device), ASUS_HOTK_CLASS);
994 acpi_driver_data(device) = hotk;
995 hotk->device = device;
997 result = asus_hotk_check();
1004 * We install the handler, it will receive the hotk in parameter, so, we
1005 * could add other data to the hotk struct
1007 status = acpi_install_notify_handler(hotk->handle, ACPI_ALL_NOTIFY,
1008 asus_hotk_notify, hotk);
1009 if (ACPI_FAILURE(status))
1010 printk(ASUS_ERR "Error installing notify handler\n");
1012 asus_hotk_found = 1;
1014 /* WLED and BLED are on by default */
1015 write_status(bt_switch_handle, 1, BT_ON);
1016 write_status(wl_switch_handle, 1, WL_ON);
1018 /* If the h/w switch is off, we need to check the real status */
1019 write_status(NULL, read_status(BT_ON), BT_ON);
1020 write_status(NULL, read_status(WL_ON), WL_ON);
1022 /* LCD Backlight is on by default */
1023 write_status(NULL, 1, LCD_ON);
1025 /* LED display is off by default */
1026 hotk->ledd_status = 0xFFF;
1028 /* Set initial values of light sensor and level */
1029 hotk->light_switch = 1; /* Default to light sensor disabled */
1030 hotk->light_level = 0; /* level 5 for sensor sensitivity */
1032 if (ls_switch_handle)
1033 set_light_sens_switch(hotk->light_switch);
1035 if (ls_level_handle)
1036 set_light_sens_level(hotk->light_level);
1038 /* GPS is on by default */
1039 write_status(NULL, 1, GPS_ON);
1050 static int asus_hotk_remove(struct acpi_device *device, int type)
1052 acpi_status status = 0;
1054 if (!device || !acpi_driver_data(device))
1057 status = acpi_remove_notify_handler(hotk->handle, ACPI_ALL_NOTIFY,
1059 if (ACPI_FAILURE(status))
1060 printk(ASUS_ERR "Error removing notify handler\n");
1068 static void asus_backlight_exit(void)
1070 if (asus_backlight_device)
1071 backlight_device_unregister(asus_backlight_device);
1074 #define ASUS_LED_UNREGISTER(object) \
1075 if(object##_led.class_dev \
1076 && !IS_ERR(object##_led.class_dev)) \
1077 led_classdev_unregister(&object##_led)
1079 static void asus_led_exit(void)
1081 ASUS_LED_UNREGISTER(mled);
1082 ASUS_LED_UNREGISTER(tled);
1083 ASUS_LED_UNREGISTER(pled);
1084 ASUS_LED_UNREGISTER(rled);
1085 ASUS_LED_UNREGISTER(gled);
1087 destroy_workqueue(led_workqueue);
1090 static void __exit asus_laptop_exit(void)
1092 asus_backlight_exit();
1095 acpi_bus_unregister_driver(&asus_hotk_driver);
1096 sysfs_remove_group(&asuspf_device->dev.kobj, &asuspf_attribute_group);
1097 platform_device_unregister(asuspf_device);
1098 platform_driver_unregister(&asuspf_driver);
1101 static int asus_backlight_init(struct device *dev)
1103 struct backlight_device *bd;
1105 if (brightness_set_handle && lcd_switch_handle) {
1106 bd = backlight_device_register(ASUS_HOTK_FILE, dev,
1110 "Could not register asus backlight device\n");
1111 asus_backlight_device = NULL;
1115 asus_backlight_device = bd;
1117 bd->props.max_brightness = 15;
1118 bd->props.brightness = read_brightness(NULL);
1119 bd->props.power = FB_BLANK_UNBLANK;
1120 backlight_update_status(bd);
1125 static int asus_led_register(acpi_handle handle,
1126 struct led_classdev *ldev, struct device *dev)
1131 return led_classdev_register(dev, ldev);
1134 #define ASUS_LED_REGISTER(object, device) \
1135 asus_led_register(object##_set_handle, &object##_led, device)
1137 static int asus_led_init(struct device *dev)
1141 rv = ASUS_LED_REGISTER(mled, dev);
1145 rv = ASUS_LED_REGISTER(tled, dev);
1149 rv = ASUS_LED_REGISTER(rled, dev);
1153 rv = ASUS_LED_REGISTER(pled, dev);
1157 rv = ASUS_LED_REGISTER(gled, dev);
1161 led_workqueue = create_singlethread_workqueue("led_workqueue");
1168 static int __init asus_laptop_init(void)
1176 result = acpi_bus_register_driver(&asus_hotk_driver);
1181 * This is a bit of a kludge. We only want this module loaded
1182 * for ASUS systems, but there's currently no way to probe the
1183 * ACPI namespace for ASUS HIDs. So we just return failure if
1184 * we didn't find one, which will cause the module to be
1187 if (!asus_hotk_found) {
1188 acpi_bus_unregister_driver(&asus_hotk_driver);
1192 dev = acpi_get_physical_device(hotk->device->handle);
1194 result = asus_backlight_init(dev);
1196 goto fail_backlight;
1198 result = asus_led_init(dev);
1202 /* Register platform stuff */
1203 result = platform_driver_register(&asuspf_driver);
1205 goto fail_platform_driver;
1207 asuspf_device = platform_device_alloc(ASUS_HOTK_FILE, -1);
1208 if (!asuspf_device) {
1210 goto fail_platform_device1;
1213 result = platform_device_add(asuspf_device);
1215 goto fail_platform_device2;
1217 result = sysfs_create_group(&asuspf_device->dev.kobj,
1218 &asuspf_attribute_group);
1225 platform_device_del(asuspf_device);
1227 fail_platform_device2:
1228 platform_device_put(asuspf_device);
1230 fail_platform_device1:
1231 platform_driver_unregister(&asuspf_driver);
1233 fail_platform_driver:
1237 asus_backlight_exit();
1244 module_init(asus_laptop_init);
1245 module_exit(asus_laptop_exit);