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/kernel.h>
37 #include <linux/module.h>
38 #include <linux/init.h>
39 #include <linux/types.h>
40 #include <linux/err.h>
41 #include <linux/proc_fs.h>
42 #include <linux/backlight.h>
44 #include <linux/leds.h>
45 #include <linux/platform_device.h>
46 #include <acpi/acpi_drivers.h>
47 #include <acpi/acpi_bus.h>
48 #include <asm/uaccess.h>
50 #define ASUS_LAPTOP_VERSION "0.42"
52 #define ASUS_HOTK_NAME "Asus Laptop Support"
53 #define ASUS_HOTK_CLASS "hotkey"
54 #define ASUS_HOTK_DEVICE_NAME "Hotkey"
55 #define ASUS_HOTK_FILE "asus-laptop"
56 #define ASUS_HOTK_PREFIX "\\_SB.ATKD."
59 * Some events we use, same for all Asus
61 #define ATKD_BR_UP 0x10
62 #define ATKD_BR_DOWN 0x20
63 #define ATKD_LCD_ON 0x33
64 #define ATKD_LCD_OFF 0x34
67 * Known bits returned by \_SB.ATKD.HWRS
73 * Flags for hotk status
74 * WL_ON and BT_ON are also used for wireless_status()
76 #define WL_ON 0x01 //internal Wifi
77 #define BT_ON 0x02 //internal Bluetooth
78 #define MLED_ON 0x04 //mail LED
79 #define TLED_ON 0x08 //touchpad LED
80 #define RLED_ON 0x10 //Record LED
81 #define PLED_ON 0x20 //Phone LED
82 #define GLED_ON 0x40 //Gaming LED
83 #define LCD_ON 0x80 //LCD backlight
84 #define GPS_ON 0x100 //GPS
86 #define ASUS_LOG ASUS_HOTK_FILE ": "
87 #define ASUS_ERR KERN_ERR ASUS_LOG
88 #define ASUS_WARNING KERN_WARNING ASUS_LOG
89 #define ASUS_NOTICE KERN_NOTICE ASUS_LOG
90 #define ASUS_INFO KERN_INFO ASUS_LOG
91 #define ASUS_DEBUG KERN_DEBUG ASUS_LOG
93 MODULE_AUTHOR("Julien Lerouge, Karol Kozimor, Corentin Chary");
94 MODULE_DESCRIPTION(ASUS_HOTK_NAME);
95 MODULE_LICENSE("GPL");
97 /* WAPF defines the behavior of the Fn+Fx wlan key
98 * The significance of values is yet to be found, but
100 * 0x0 will do nothing
101 * 0x1 will allow to control the device with Fn+Fx key.
102 * 0x4 will send an ACPI event (0x88) while pressing the Fn+Fx key
103 * 0x5 like 0x1 or 0x4
104 * So, if something doesn't work as you want, just try other values =)
106 static uint wapf = 1;
107 module_param(wapf, uint, 0644);
108 MODULE_PARM_DESC(wapf, "WAPF value");
110 #define ASUS_HANDLE(object, paths...) \
111 static acpi_handle object##_handle = NULL; \
112 static char *object##_paths[] = { paths }
115 ASUS_HANDLE(mled_set, ASUS_HOTK_PREFIX "MLED");
116 ASUS_HANDLE(tled_set, ASUS_HOTK_PREFIX "TLED");
117 ASUS_HANDLE(rled_set, ASUS_HOTK_PREFIX "RLED"); /* W1JC */
118 ASUS_HANDLE(pled_set, ASUS_HOTK_PREFIX "PLED"); /* A7J */
119 ASUS_HANDLE(gled_set, ASUS_HOTK_PREFIX "GLED"); /* G1, G2 (probably) */
122 ASUS_HANDLE(ledd_set, ASUS_HOTK_PREFIX "SLCM");
124 /* Bluetooth and WLAN
125 * WLED and BLED are not handled like other XLED, because in some dsdt
126 * they also control the WLAN/Bluetooth device.
128 ASUS_HANDLE(wl_switch, ASUS_HOTK_PREFIX "WLED");
129 ASUS_HANDLE(bt_switch, ASUS_HOTK_PREFIX "BLED");
130 ASUS_HANDLE(wireless_status, ASUS_HOTK_PREFIX "RSTS"); /* All new models */
133 ASUS_HANDLE(brightness_set, ASUS_HOTK_PREFIX "SPLV");
134 ASUS_HANDLE(brightness_get, ASUS_HOTK_PREFIX "GPLV");
137 ASUS_HANDLE(lcd_switch, "\\_SB.PCI0.SBRG.EC0._Q10", /* All new models */
138 "\\_SB.PCI0.ISA.EC0._Q10", /* A1x */
139 "\\_SB.PCI0.PX40.ECD0._Q10", /* L3C */
140 "\\_SB.PCI0.PX40.EC0.Q10", /* M1A */
141 "\\_SB.PCI0.LPCB.EC0._Q10", /* P30 */
142 "\\_SB.PCI0.PX40.Q10", /* S1x */
143 "\\Q10"); /* A2x, L2D, L3D, M2E */
146 ASUS_HANDLE(display_set, ASUS_HOTK_PREFIX "SDSP");
147 ASUS_HANDLE(display_get, "\\_SB.PCI0.P0P1.VGA.GETD", /* A6B, A6K A6R A7D F3JM L4R M6R A3G
148 M6A M6V VX-1 V6J V6V W3Z */
149 "\\_SB.PCI0.P0P2.VGA.GETD", /* A3E A4K, A4D A4L A6J A7J A8J Z71V M9V
150 S5A M5A z33A W1Jc W2V G1 */
151 "\\_SB.PCI0.P0P3.VGA.GETD", /* A6V A6Q */
152 "\\_SB.PCI0.P0PA.VGA.GETD", /* A6T, A6M */
153 "\\_SB.PCI0.PCI1.VGAC.NMAP", /* L3C */
154 "\\_SB.PCI0.VGA.GETD", /* Z96F */
156 "\\ADVG", /* A4G Z71A W1N W5A W5F M2N M3N M5N M6N S1N S5N */
158 "\\INFB", /* A2H D1 L2D L3D L3H L2E L5D L5C M1A M2E L4L W3V */
159 "\\SSTE"); /* A3F A6F A3N A3L M6N W3N W6A */
161 ASUS_HANDLE(ls_switch, ASUS_HOTK_PREFIX "ALSC"); /* Z71A Z71V */
162 ASUS_HANDLE(ls_level, ASUS_HOTK_PREFIX "ALSL"); /* Z71A Z71V */
165 /* R2H use different handle for GPS on/off */
166 ASUS_HANDLE(gps_on, ASUS_HOTK_PREFIX "SDON"); /* R2H */
167 ASUS_HANDLE(gps_off, ASUS_HOTK_PREFIX "SDOF"); /* R2H */
168 ASUS_HANDLE(gps_status, ASUS_HOTK_PREFIX "GPST");
171 * This is the main structure, we can use it to store anything interesting
172 * about the hotk device
175 char *name; //laptop name
176 struct acpi_device *device; //the device we are in
177 acpi_handle handle; //the handle of the hotk device
178 char status; //status of the hotk, for LEDs, ...
179 u32 ledd_status; //status of the LED display
180 u8 light_level; //light sensor level
181 u8 light_switch; //light sensor switch value
182 u16 event_count[128]; //count for each event TODO make this better
186 * This header is made available to allow proper configuration given model,
187 * revision number , ... this info cannot go in struct asus_hotk because it is
188 * available before the hotk
190 static struct acpi_table_header *asus_info;
192 /* The actual device the driver binds to */
193 static struct asus_hotk *hotk;
196 * The hotkey driver declaration
198 static const struct acpi_device_id asus_device_ids[] = {
202 MODULE_DEVICE_TABLE(acpi, asus_device_ids);
204 static int asus_hotk_add(struct acpi_device *device);
205 static int asus_hotk_remove(struct acpi_device *device, int type);
206 static struct acpi_driver asus_hotk_driver = {
207 .name = ASUS_HOTK_NAME,
208 .class = ASUS_HOTK_CLASS,
209 .ids = asus_device_ids,
211 .add = asus_hotk_add,
212 .remove = asus_hotk_remove,
216 /* The backlight device /sys/class/backlight */
217 static struct backlight_device *asus_backlight_device;
220 * The backlight class declaration
222 static int read_brightness(struct backlight_device *bd);
223 static int update_bl_status(struct backlight_device *bd);
224 static struct backlight_ops asusbl_ops = {
225 .get_brightness = read_brightness,
226 .update_status = update_bl_status,
229 /* These functions actually update the LED's, and are called from a
230 * workqueue. By doing this as separate work rather than when the LED
231 * subsystem asks, we avoid messing with the Asus ACPI stuff during a
232 * potentially bad time, such as a timer interrupt. */
233 static struct workqueue_struct *led_workqueue;
235 #define ASUS_LED(object, ledname) \
236 static void object##_led_set(struct led_classdev *led_cdev, \
237 enum led_brightness value); \
238 static void object##_led_update(struct work_struct *ignored); \
239 static int object##_led_wk; \
240 static DECLARE_WORK(object##_led_work, object##_led_update); \
241 static struct led_classdev object##_led = { \
242 .name = "asus::" ledname, \
243 .brightness_set = object##_led_set, \
246 ASUS_LED(mled, "mail");
247 ASUS_LED(tled, "touchpad");
248 ASUS_LED(rled, "record");
249 ASUS_LED(pled, "phone");
250 ASUS_LED(gled, "gaming");
253 * This function evaluates an ACPI method, given an int as parameter, the
254 * method is searched within the scope of the handle, can be NULL. The output
255 * of the method is written is output, which can also be NULL
257 * returns 0 if write is successful, -1 else.
259 static int write_acpi_int(acpi_handle handle, const char *method, int val,
260 struct acpi_buffer *output)
262 struct acpi_object_list params; //list of input parameters (an int here)
263 union acpi_object in_obj; //the only param we use
270 params.pointer = &in_obj;
271 in_obj.type = ACPI_TYPE_INTEGER;
272 in_obj.integer.value = val;
274 status = acpi_evaluate_object(handle, (char *)method, ¶ms, output);
281 static int read_wireless_status(int mask)
283 unsigned long long status;
284 acpi_status rv = AE_OK;
286 if (!wireless_status_handle)
287 return (hotk->status & mask) ? 1 : 0;
289 rv = acpi_evaluate_integer(wireless_status_handle, NULL, NULL, &status);
290 if (ACPI_FAILURE(rv))
291 printk(ASUS_WARNING "Error reading Wireless status\n");
293 return (status & mask) ? 1 : 0;
295 return (hotk->status & mask) ? 1 : 0;
298 static int read_gps_status(void)
300 unsigned long long status;
301 acpi_status rv = AE_OK;
303 rv = acpi_evaluate_integer(gps_status_handle, NULL, NULL, &status);
304 if (ACPI_FAILURE(rv))
305 printk(ASUS_WARNING "Error reading GPS status\n");
307 return status ? 1 : 0;
309 return (hotk->status & GPS_ON) ? 1 : 0;
312 /* Generic LED functions */
313 static int read_status(int mask)
315 /* There is a special method for both wireless devices */
316 if (mask == BT_ON || mask == WL_ON)
317 return read_wireless_status(mask);
318 else if (mask == GPS_ON)
319 return read_gps_status();
321 return (hotk->status & mask) ? 1 : 0;
324 static void write_status(acpi_handle handle, int out, int mask)
326 hotk->status = (out) ? (hotk->status | mask) : (hotk->status & ~mask);
333 out = (out & 0x1) + 1;
336 handle = (out) ? gps_on_handle : gps_off_handle;
344 if (write_acpi_int(handle, NULL, out, NULL))
345 printk(ASUS_WARNING " write failed %x\n", mask);
348 /* /sys/class/led handlers */
349 #define ASUS_LED_HANDLER(object, mask) \
350 static void object##_led_set(struct led_classdev *led_cdev, \
351 enum led_brightness value) \
353 object##_led_wk = value; \
354 queue_work(led_workqueue, &object##_led_work); \
356 static void object##_led_update(struct work_struct *ignored) \
358 int value = object##_led_wk; \
359 write_status(object##_set_handle, value, (mask)); \
362 ASUS_LED_HANDLER(mled, MLED_ON);
363 ASUS_LED_HANDLER(pled, PLED_ON);
364 ASUS_LED_HANDLER(rled, RLED_ON);
365 ASUS_LED_HANDLER(tled, TLED_ON);
366 ASUS_LED_HANDLER(gled, GLED_ON);
368 static int get_lcd_state(void)
370 return read_status(LCD_ON);
373 static int set_lcd_state(int value)
376 acpi_status status = 0;
380 if (lcd == get_lcd_state())
383 if (lcd_switch_handle) {
384 status = acpi_evaluate_object(lcd_switch_handle,
387 if (ACPI_FAILURE(status))
388 printk(ASUS_WARNING "Error switching LCD\n");
391 write_status(NULL, lcd, LCD_ON);
395 static void lcd_blank(int blank)
397 struct backlight_device *bd = asus_backlight_device;
400 bd->props.power = blank;
401 backlight_update_status(bd);
405 static int read_brightness(struct backlight_device *bd)
407 unsigned long long value;
408 acpi_status rv = AE_OK;
410 rv = acpi_evaluate_integer(brightness_get_handle, NULL, NULL, &value);
411 if (ACPI_FAILURE(rv))
412 printk(ASUS_WARNING "Error reading brightness\n");
417 static int set_brightness(struct backlight_device *bd, int value)
421 value = (0 < value) ? ((15 < value) ? 15 : value) : 0;
422 /* 0 <= value <= 15 */
424 if (write_acpi_int(brightness_set_handle, NULL, value, NULL)) {
425 printk(ASUS_WARNING "Error changing brightness\n");
432 static int update_bl_status(struct backlight_device *bd)
435 int value = bd->props.brightness;
437 rv = set_brightness(bd, value);
441 value = (bd->props.power == FB_BLANK_UNBLANK) ? 1 : 0;
442 return set_lcd_state(value);
446 * Platform device handlers
450 * We write our info in page, we begin at offset off and cannot write more
451 * than count bytes. We set eof to 1 if we handle those 2 values. We return the
452 * number of bytes written in page
454 static ssize_t show_infos(struct device *dev,
455 struct device_attribute *attr, char *page)
458 unsigned long long temp;
459 char buf[16]; //enough for all info
460 acpi_status rv = AE_OK;
463 * We use the easy way, we don't care of off and count, so we don't set eof
467 len += sprintf(page, ASUS_HOTK_NAME " " ASUS_LAPTOP_VERSION "\n");
468 len += sprintf(page + len, "Model reference : %s\n", hotk->name);
470 * The SFUN method probably allows the original driver to get the list
471 * of features supported by a given model. For now, 0x0100 or 0x0800
472 * bit signifies that the laptop is equipped with a Wi-Fi MiniPCI card.
473 * The significance of others is yet to be found.
475 rv = acpi_evaluate_integer(hotk->handle, "SFUN", NULL, &temp);
476 if (!ACPI_FAILURE(rv))
477 len += sprintf(page + len, "SFUN value : 0x%04x\n",
480 * Another value for userspace: the ASYM method returns 0x02 for
481 * battery low and 0x04 for battery critical, its readings tend to be
482 * more accurate than those provided by _BST.
483 * Note: since not all the laptops provide this method, errors are
486 rv = acpi_evaluate_integer(hotk->handle, "ASYM", NULL, &temp);
487 if (!ACPI_FAILURE(rv))
488 len += sprintf(page + len, "ASYM value : 0x%04x\n",
491 snprintf(buf, 16, "%d", asus_info->length);
492 len += sprintf(page + len, "DSDT length : %s\n", buf);
493 snprintf(buf, 16, "%d", asus_info->checksum);
494 len += sprintf(page + len, "DSDT checksum : %s\n", buf);
495 snprintf(buf, 16, "%d", asus_info->revision);
496 len += sprintf(page + len, "DSDT revision : %s\n", buf);
497 snprintf(buf, 7, "%s", asus_info->oem_id);
498 len += sprintf(page + len, "OEM id : %s\n", buf);
499 snprintf(buf, 9, "%s", asus_info->oem_table_id);
500 len += sprintf(page + len, "OEM table id : %s\n", buf);
501 snprintf(buf, 16, "%x", asus_info->oem_revision);
502 len += sprintf(page + len, "OEM revision : 0x%s\n", buf);
503 snprintf(buf, 5, "%s", asus_info->asl_compiler_id);
504 len += sprintf(page + len, "ASL comp vendor id : %s\n", buf);
505 snprintf(buf, 16, "%x", asus_info->asl_compiler_revision);
506 len += sprintf(page + len, "ASL comp revision : 0x%s\n", buf);
512 static int parse_arg(const char *buf, unsigned long count, int *val)
518 if (sscanf(buf, "%i", val) != 1)
523 static ssize_t store_status(const char *buf, size_t count,
524 acpi_handle handle, int mask)
529 rv = parse_arg(buf, count, &value);
533 write_status(handle, out, mask);
541 static ssize_t show_ledd(struct device *dev,
542 struct device_attribute *attr, char *buf)
544 return sprintf(buf, "0x%08x\n", hotk->ledd_status);
547 static ssize_t store_ledd(struct device *dev, struct device_attribute *attr,
548 const char *buf, size_t count)
552 rv = parse_arg(buf, count, &value);
554 if (write_acpi_int(ledd_set_handle, NULL, value, NULL))
555 printk(ASUS_WARNING "LED display write failed\n");
557 hotk->ledd_status = (u32) value;
565 static ssize_t show_wlan(struct device *dev,
566 struct device_attribute *attr, char *buf)
568 return sprintf(buf, "%d\n", read_status(WL_ON));
571 static ssize_t store_wlan(struct device *dev, struct device_attribute *attr,
572 const char *buf, size_t count)
574 return store_status(buf, count, wl_switch_handle, WL_ON);
580 static ssize_t show_bluetooth(struct device *dev,
581 struct device_attribute *attr, char *buf)
583 return sprintf(buf, "%d\n", read_status(BT_ON));
586 static ssize_t store_bluetooth(struct device *dev,
587 struct device_attribute *attr, const char *buf,
590 return store_status(buf, count, bt_switch_handle, BT_ON);
596 static void set_display(int value)
598 /* no sanity check needed for now */
599 if (write_acpi_int(display_set_handle, NULL, value, NULL))
600 printk(ASUS_WARNING "Error setting display\n");
604 static int read_display(void)
606 unsigned long long value = 0;
607 acpi_status rv = AE_OK;
609 /* In most of the case, we know how to set the display, but sometime
611 if (display_get_handle) {
612 rv = acpi_evaluate_integer(display_get_handle, NULL,
614 if (ACPI_FAILURE(rv))
615 printk(ASUS_WARNING "Error reading display status\n");
618 value &= 0x0F; /* needed for some models, shouldn't hurt others */
624 * Now, *this* one could be more user-friendly, but so far, no-one has
625 * complained. The significance of bits is the same as in store_disp()
627 static ssize_t show_disp(struct device *dev,
628 struct device_attribute *attr, char *buf)
630 return sprintf(buf, "%d\n", read_display());
634 * Experimental support for display switching. As of now: 1 should activate
635 * the LCD output, 2 should do for CRT, 4 for TV-Out and 8 for DVI.
636 * Any combination (bitwise) of these will suffice. I never actually tested 4
637 * displays hooked up simultaneously, so be warned. See the acpi4asus README
640 static ssize_t store_disp(struct device *dev, struct device_attribute *attr,
641 const char *buf, size_t count)
645 rv = parse_arg(buf, count, &value);
654 static void set_light_sens_switch(int value)
656 if (write_acpi_int(ls_switch_handle, NULL, value, NULL))
657 printk(ASUS_WARNING "Error setting light sensor switch\n");
658 hotk->light_switch = value;
661 static ssize_t show_lssw(struct device *dev,
662 struct device_attribute *attr, char *buf)
664 return sprintf(buf, "%d\n", hotk->light_switch);
667 static ssize_t store_lssw(struct device *dev, struct device_attribute *attr,
668 const char *buf, size_t count)
672 rv = parse_arg(buf, count, &value);
674 set_light_sens_switch(value ? 1 : 0);
679 static void set_light_sens_level(int value)
681 if (write_acpi_int(ls_level_handle, NULL, value, NULL))
682 printk(ASUS_WARNING "Error setting light sensor level\n");
683 hotk->light_level = value;
686 static ssize_t show_lslvl(struct device *dev,
687 struct device_attribute *attr, char *buf)
689 return sprintf(buf, "%d\n", hotk->light_level);
692 static ssize_t store_lslvl(struct device *dev, struct device_attribute *attr,
693 const char *buf, size_t count)
697 rv = parse_arg(buf, count, &value);
699 value = (0 < value) ? ((15 < value) ? 15 : value) : 0;
700 /* 0 <= value <= 15 */
701 set_light_sens_level(value);
710 static ssize_t show_gps(struct device *dev,
711 struct device_attribute *attr, char *buf)
713 return sprintf(buf, "%d\n", read_status(GPS_ON));
716 static ssize_t store_gps(struct device *dev, struct device_attribute *attr,
717 const char *buf, size_t count)
719 return store_status(buf, count, NULL, GPS_ON);
722 static void asus_hotk_notify(acpi_handle handle, u32 event, void *data)
724 /* TODO Find a better way to handle events count. */
729 * We need to tell the backlight device when the backlight power is
732 if (event == ATKD_LCD_ON) {
733 write_status(NULL, 1, LCD_ON);
734 lcd_blank(FB_BLANK_UNBLANK);
735 } else if (event == ATKD_LCD_OFF) {
736 write_status(NULL, 0, LCD_ON);
737 lcd_blank(FB_BLANK_POWERDOWN);
740 acpi_bus_generate_proc_event(hotk->device, event,
741 hotk->event_count[event % 128]++);
746 #define ASUS_CREATE_DEVICE_ATTR(_name) \
747 struct device_attribute dev_attr_##_name = { \
749 .name = __stringify(_name), \
755 #define ASUS_SET_DEVICE_ATTR(_name, _mode, _show, _store) \
757 dev_attr_##_name.attr.mode = _mode; \
758 dev_attr_##_name.show = _show; \
759 dev_attr_##_name.store = _store; \
762 static ASUS_CREATE_DEVICE_ATTR(infos);
763 static ASUS_CREATE_DEVICE_ATTR(wlan);
764 static ASUS_CREATE_DEVICE_ATTR(bluetooth);
765 static ASUS_CREATE_DEVICE_ATTR(display);
766 static ASUS_CREATE_DEVICE_ATTR(ledd);
767 static ASUS_CREATE_DEVICE_ATTR(ls_switch);
768 static ASUS_CREATE_DEVICE_ATTR(ls_level);
769 static ASUS_CREATE_DEVICE_ATTR(gps);
771 static struct attribute *asuspf_attributes[] = {
772 &dev_attr_infos.attr,
774 &dev_attr_bluetooth.attr,
775 &dev_attr_display.attr,
777 &dev_attr_ls_switch.attr,
778 &dev_attr_ls_level.attr,
783 static struct attribute_group asuspf_attribute_group = {
784 .attrs = asuspf_attributes
787 static struct platform_driver asuspf_driver = {
789 .name = ASUS_HOTK_FILE,
790 .owner = THIS_MODULE,
794 static struct platform_device *asuspf_device;
796 static void asus_hotk_add_fs(void)
798 ASUS_SET_DEVICE_ATTR(infos, 0444, show_infos, NULL);
800 if (wl_switch_handle)
801 ASUS_SET_DEVICE_ATTR(wlan, 0644, show_wlan, store_wlan);
803 if (bt_switch_handle)
804 ASUS_SET_DEVICE_ATTR(bluetooth, 0644,
805 show_bluetooth, store_bluetooth);
807 if (display_set_handle && display_get_handle)
808 ASUS_SET_DEVICE_ATTR(display, 0644, show_disp, store_disp);
809 else if (display_set_handle)
810 ASUS_SET_DEVICE_ATTR(display, 0200, NULL, store_disp);
813 ASUS_SET_DEVICE_ATTR(ledd, 0644, show_ledd, store_ledd);
815 if (ls_switch_handle && ls_level_handle) {
816 ASUS_SET_DEVICE_ATTR(ls_level, 0644, show_lslvl, store_lslvl);
817 ASUS_SET_DEVICE_ATTR(ls_switch, 0644, show_lssw, store_lssw);
820 if (gps_status_handle && gps_on_handle && gps_off_handle)
821 ASUS_SET_DEVICE_ATTR(gps, 0644, show_gps, store_gps);
824 static int asus_handle_init(char *name, acpi_handle * handle,
825 char **paths, int num_paths)
830 for (i = 0; i < num_paths; i++) {
831 status = acpi_get_handle(NULL, paths[i], handle);
832 if (ACPI_SUCCESS(status))
840 #define ASUS_HANDLE_INIT(object) \
841 asus_handle_init(#object, &object##_handle, object##_paths, \
842 ARRAY_SIZE(object##_paths))
845 * This function is used to initialize the hotk with right values. In this
846 * method, we can make all the detection we want, and modify the hotk struct
848 static int asus_hotk_get_info(void)
850 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
851 union acpi_object *model = NULL;
852 unsigned long long bsts_result, hwrs_result;
857 * Get DSDT headers early enough to allow for differentiating between
858 * models, but late enough to allow acpi_bus_register_driver() to fail
859 * before doing anything ACPI-specific. Should we encounter a machine,
860 * which needs special handling (i.e. its hotkey device has a different
861 * HID), this bit will be moved. A global variable asus_info contains
864 status = acpi_get_table(ACPI_SIG_DSDT, 1, &asus_info);
865 if (ACPI_FAILURE(status))
866 printk(ASUS_WARNING "Couldn't get the DSDT table header\n");
868 /* We have to write 0 on init this far for all ASUS models */
869 if (write_acpi_int(hotk->handle, "INIT", 0, &buffer)) {
870 printk(ASUS_ERR "Hotkey initialization failed\n");
874 /* This needs to be called for some laptops to init properly */
876 acpi_evaluate_integer(hotk->handle, "BSTS", NULL, &bsts_result);
877 if (ACPI_FAILURE(status))
878 printk(ASUS_WARNING "Error calling BSTS\n");
879 else if (bsts_result)
880 printk(ASUS_NOTICE "BSTS called, 0x%02x returned\n",
884 write_acpi_int(hotk->handle, "CWAP", wapf, NULL);
887 * Try to match the object returned by INIT to the specific model.
888 * Handle every possible object (or the lack of thereof) the DSDT
889 * writers might throw at us. When in trouble, we pass NULL to
890 * asus_model_match() and try something completely different.
892 if (buffer.pointer) {
893 model = buffer.pointer;
894 switch (model->type) {
895 case ACPI_TYPE_STRING:
896 string = model->string.pointer;
898 case ACPI_TYPE_BUFFER:
899 string = model->buffer.pointer;
906 hotk->name = kstrdup(string, GFP_KERNEL);
911 printk(ASUS_NOTICE " %s model detected\n", string);
913 ASUS_HANDLE_INIT(mled_set);
914 ASUS_HANDLE_INIT(tled_set);
915 ASUS_HANDLE_INIT(rled_set);
916 ASUS_HANDLE_INIT(pled_set);
917 ASUS_HANDLE_INIT(gled_set);
919 ASUS_HANDLE_INIT(ledd_set);
922 * The HWRS method return informations about the hardware.
923 * 0x80 bit is for WLAN, 0x100 for Bluetooth.
924 * The significance of others is yet to be found.
925 * If we don't find the method, we assume the device are present.
928 acpi_evaluate_integer(hotk->handle, "HRWS", NULL, &hwrs_result);
929 if (ACPI_FAILURE(status))
930 hwrs_result = WL_HWRS | BT_HWRS;
932 if (hwrs_result & WL_HWRS)
933 ASUS_HANDLE_INIT(wl_switch);
934 if (hwrs_result & BT_HWRS)
935 ASUS_HANDLE_INIT(bt_switch);
937 ASUS_HANDLE_INIT(wireless_status);
939 ASUS_HANDLE_INIT(brightness_set);
940 ASUS_HANDLE_INIT(brightness_get);
942 ASUS_HANDLE_INIT(lcd_switch);
944 ASUS_HANDLE_INIT(display_set);
945 ASUS_HANDLE_INIT(display_get);
947 /* There is a lot of models with "ALSL", but a few get
948 a real light sens, so we need to check it. */
949 if (!ASUS_HANDLE_INIT(ls_switch))
950 ASUS_HANDLE_INIT(ls_level);
952 ASUS_HANDLE_INIT(gps_on);
953 ASUS_HANDLE_INIT(gps_off);
954 ASUS_HANDLE_INIT(gps_status);
961 static int asus_hotk_check(void)
965 result = acpi_bus_get_status(hotk->device);
969 if (hotk->device->status.present) {
970 result = asus_hotk_get_info();
972 printk(ASUS_ERR "Hotkey device not present, aborting\n");
979 static int asus_hotk_found;
981 static int asus_hotk_add(struct acpi_device *device)
983 acpi_status status = AE_OK;
989 printk(ASUS_NOTICE "Asus Laptop Support version %s\n",
990 ASUS_LAPTOP_VERSION);
992 hotk = kzalloc(sizeof(struct asus_hotk), GFP_KERNEL);
996 hotk->handle = device->handle;
997 strcpy(acpi_device_name(device), ASUS_HOTK_DEVICE_NAME);
998 strcpy(acpi_device_class(device), ASUS_HOTK_CLASS);
999 acpi_driver_data(device) = hotk;
1000 hotk->device = device;
1002 result = asus_hotk_check();
1009 * We install the handler, it will receive the hotk in parameter, so, we
1010 * could add other data to the hotk struct
1012 status = acpi_install_notify_handler(hotk->handle, ACPI_ALL_NOTIFY,
1013 asus_hotk_notify, hotk);
1014 if (ACPI_FAILURE(status))
1015 printk(ASUS_ERR "Error installing notify handler\n");
1017 asus_hotk_found = 1;
1019 /* WLED and BLED are on by default */
1020 write_status(bt_switch_handle, 1, BT_ON);
1021 write_status(wl_switch_handle, 1, WL_ON);
1023 /* If the h/w switch is off, we need to check the real status */
1024 write_status(NULL, read_status(BT_ON), BT_ON);
1025 write_status(NULL, read_status(WL_ON), WL_ON);
1027 /* LCD Backlight is on by default */
1028 write_status(NULL, 1, LCD_ON);
1030 /* LED display is off by default */
1031 hotk->ledd_status = 0xFFF;
1033 /* Set initial values of light sensor and level */
1034 hotk->light_switch = 1; /* Default to light sensor disabled */
1035 hotk->light_level = 0; /* level 5 for sensor sensitivity */
1037 if (ls_switch_handle)
1038 set_light_sens_switch(hotk->light_switch);
1040 if (ls_level_handle)
1041 set_light_sens_level(hotk->light_level);
1043 /* GPS is on by default */
1044 write_status(NULL, 1, GPS_ON);
1055 static int asus_hotk_remove(struct acpi_device *device, int type)
1057 acpi_status status = 0;
1059 if (!device || !acpi_driver_data(device))
1062 status = acpi_remove_notify_handler(hotk->handle, ACPI_ALL_NOTIFY,
1064 if (ACPI_FAILURE(status))
1065 printk(ASUS_ERR "Error removing notify handler\n");
1073 static void asus_backlight_exit(void)
1075 if (asus_backlight_device)
1076 backlight_device_unregister(asus_backlight_device);
1079 #define ASUS_LED_UNREGISTER(object) \
1080 if (object##_led.dev) \
1081 led_classdev_unregister(&object##_led)
1083 static void asus_led_exit(void)
1085 destroy_workqueue(led_workqueue);
1086 ASUS_LED_UNREGISTER(mled);
1087 ASUS_LED_UNREGISTER(tled);
1088 ASUS_LED_UNREGISTER(pled);
1089 ASUS_LED_UNREGISTER(rled);
1090 ASUS_LED_UNREGISTER(gled);
1093 static void __exit asus_laptop_exit(void)
1095 asus_backlight_exit();
1098 acpi_bus_unregister_driver(&asus_hotk_driver);
1099 sysfs_remove_group(&asuspf_device->dev.kobj, &asuspf_attribute_group);
1100 platform_device_unregister(asuspf_device);
1101 platform_driver_unregister(&asuspf_driver);
1104 static int asus_backlight_init(struct device *dev)
1106 struct backlight_device *bd;
1108 if (brightness_set_handle && lcd_switch_handle) {
1109 bd = backlight_device_register(ASUS_HOTK_FILE, dev,
1113 "Could not register asus backlight device\n");
1114 asus_backlight_device = NULL;
1118 asus_backlight_device = bd;
1120 bd->props.max_brightness = 15;
1121 bd->props.brightness = read_brightness(NULL);
1122 bd->props.power = FB_BLANK_UNBLANK;
1123 backlight_update_status(bd);
1128 static int asus_led_register(acpi_handle handle,
1129 struct led_classdev *ldev, struct device *dev)
1134 return led_classdev_register(dev, ldev);
1137 #define ASUS_LED_REGISTER(object, device) \
1138 asus_led_register(object##_set_handle, &object##_led, device)
1140 static int asus_led_init(struct device *dev)
1144 rv = ASUS_LED_REGISTER(mled, dev);
1148 rv = ASUS_LED_REGISTER(tled, dev);
1152 rv = ASUS_LED_REGISTER(rled, dev);
1156 rv = ASUS_LED_REGISTER(pled, dev);
1160 rv = ASUS_LED_REGISTER(gled, dev);
1164 led_workqueue = create_singlethread_workqueue("led_workqueue");
1171 ASUS_LED_UNREGISTER(gled);
1173 ASUS_LED_UNREGISTER(pled);
1175 ASUS_LED_UNREGISTER(rled);
1177 ASUS_LED_UNREGISTER(tled);
1179 ASUS_LED_UNREGISTER(mled);
1184 static int __init asus_laptop_init(void)
1192 result = acpi_bus_register_driver(&asus_hotk_driver);
1197 * This is a bit of a kludge. We only want this module loaded
1198 * for ASUS systems, but there's currently no way to probe the
1199 * ACPI namespace for ASUS HIDs. So we just return failure if
1200 * we didn't find one, which will cause the module to be
1203 if (!asus_hotk_found) {
1204 acpi_bus_unregister_driver(&asus_hotk_driver);
1208 dev = acpi_get_physical_device(hotk->device->handle);
1210 result = asus_backlight_init(dev);
1212 goto fail_backlight;
1214 result = asus_led_init(dev);
1218 /* Register platform stuff */
1219 result = platform_driver_register(&asuspf_driver);
1221 goto fail_platform_driver;
1223 asuspf_device = platform_device_alloc(ASUS_HOTK_FILE, -1);
1224 if (!asuspf_device) {
1226 goto fail_platform_device1;
1229 result = platform_device_add(asuspf_device);
1231 goto fail_platform_device2;
1233 result = sysfs_create_group(&asuspf_device->dev.kobj,
1234 &asuspf_attribute_group);
1241 platform_device_del(asuspf_device);
1243 fail_platform_device2:
1244 platform_device_put(asuspf_device);
1246 fail_platform_device1:
1247 platform_driver_unregister(&asuspf_driver);
1249 fail_platform_driver:
1253 asus_backlight_exit();
1260 module_init(asus_laptop_init);
1261 module_exit(asus_laptop_exit);