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_HID "ATK0100"
57 #define ASUS_HOTK_FILE "asus-laptop"
58 #define ASUS_HOTK_PREFIX "\\_SB.ATKD."
61 * Some events we use, same for all Asus
63 #define ATKD_BR_UP 0x10
64 #define ATKD_BR_DOWN 0x20
65 #define ATKD_LCD_ON 0x33
66 #define ATKD_LCD_OFF 0x34
69 * Known bits returned by \_SB.ATKD.HWRS
75 * Flags for hotk status
76 * WL_ON and BT_ON are also used for wireless_status()
78 #define WL_ON 0x01 //internal Wifi
79 #define BT_ON 0x02 //internal Bluetooth
80 #define MLED_ON 0x04 //mail LED
81 #define TLED_ON 0x08 //touchpad LED
82 #define RLED_ON 0x10 //Record LED
83 #define PLED_ON 0x20 //Phone LED
84 #define GLED_ON 0x40 //Gaming LED
85 #define LCD_ON 0x80 //LCD backlight
86 #define GPS_ON 0x100 //GPS
88 #define ASUS_LOG ASUS_HOTK_FILE ": "
89 #define ASUS_ERR KERN_ERR ASUS_LOG
90 #define ASUS_WARNING KERN_WARNING ASUS_LOG
91 #define ASUS_NOTICE KERN_NOTICE ASUS_LOG
92 #define ASUS_INFO KERN_INFO ASUS_LOG
93 #define ASUS_DEBUG KERN_DEBUG ASUS_LOG
95 MODULE_AUTHOR("Julien Lerouge, Karol Kozimor, Corentin Chary");
96 MODULE_DESCRIPTION(ASUS_HOTK_NAME);
97 MODULE_LICENSE("GPL");
99 /* WAPF defines the behavior of the Fn+Fx wlan key
100 * The significance of values is yet to be found, but
102 * 0x0 will do nothing
103 * 0x1 will allow to control the device with Fn+Fx key.
104 * 0x4 will send an ACPI event (0x88) while pressing the Fn+Fx key
105 * 0x5 like 0x1 or 0x4
106 * So, if something doesn't work as you want, just try other values =)
108 static uint wapf = 1;
109 module_param(wapf, uint, 0644);
110 MODULE_PARM_DESC(wapf, "WAPF value");
112 #define ASUS_HANDLE(object, paths...) \
113 static acpi_handle object##_handle = NULL; \
114 static char *object##_paths[] = { paths }
117 ASUS_HANDLE(mled_set, ASUS_HOTK_PREFIX "MLED");
118 ASUS_HANDLE(tled_set, ASUS_HOTK_PREFIX "TLED");
119 ASUS_HANDLE(rled_set, ASUS_HOTK_PREFIX "RLED"); /* W1JC */
120 ASUS_HANDLE(pled_set, ASUS_HOTK_PREFIX "PLED"); /* A7J */
121 ASUS_HANDLE(gled_set, ASUS_HOTK_PREFIX "GLED"); /* G1, G2 (probably) */
124 ASUS_HANDLE(ledd_set, ASUS_HOTK_PREFIX "SLCM");
126 /* Bluetooth and WLAN
127 * WLED and BLED are not handled like other XLED, because in some dsdt
128 * they also control the WLAN/Bluetooth device.
130 ASUS_HANDLE(wl_switch, ASUS_HOTK_PREFIX "WLED");
131 ASUS_HANDLE(bt_switch, ASUS_HOTK_PREFIX "BLED");
132 ASUS_HANDLE(wireless_status, ASUS_HOTK_PREFIX "RSTS"); /* All new models */
135 ASUS_HANDLE(brightness_set, ASUS_HOTK_PREFIX "SPLV");
136 ASUS_HANDLE(brightness_get, ASUS_HOTK_PREFIX "GPLV");
139 ASUS_HANDLE(lcd_switch, "\\_SB.PCI0.SBRG.EC0._Q10", /* All new models */
140 "\\_SB.PCI0.ISA.EC0._Q10", /* A1x */
141 "\\_SB.PCI0.PX40.ECD0._Q10", /* L3C */
142 "\\_SB.PCI0.PX40.EC0.Q10", /* M1A */
143 "\\_SB.PCI0.LPCB.EC0._Q10", /* P30 */
144 "\\_SB.PCI0.PX40.Q10", /* S1x */
145 "\\Q10"); /* A2x, L2D, L3D, M2E */
148 ASUS_HANDLE(display_set, ASUS_HOTK_PREFIX "SDSP");
149 ASUS_HANDLE(display_get, "\\_SB.PCI0.P0P1.VGA.GETD", /* A6B, A6K A6R A7D F3JM L4R M6R A3G
150 M6A M6V VX-1 V6J V6V W3Z */
151 "\\_SB.PCI0.P0P2.VGA.GETD", /* A3E A4K, A4D A4L A6J A7J A8J Z71V M9V
152 S5A M5A z33A W1Jc W2V G1 */
153 "\\_SB.PCI0.P0P3.VGA.GETD", /* A6V A6Q */
154 "\\_SB.PCI0.P0PA.VGA.GETD", /* A6T, A6M */
155 "\\_SB.PCI0.PCI1.VGAC.NMAP", /* L3C */
156 "\\_SB.PCI0.VGA.GETD", /* Z96F */
158 "\\ADVG", /* A4G Z71A W1N W5A W5F M2N M3N M5N M6N S1N S5N */
160 "\\INFB", /* A2H D1 L2D L3D L3H L2E L5D L5C M1A M2E L4L W3V */
161 "\\SSTE"); /* A3F A6F A3N A3L M6N W3N W6A */
163 ASUS_HANDLE(ls_switch, ASUS_HOTK_PREFIX "ALSC"); /* Z71A Z71V */
164 ASUS_HANDLE(ls_level, ASUS_HOTK_PREFIX "ALSL"); /* Z71A Z71V */
167 /* R2H use different handle for GPS on/off */
168 ASUS_HANDLE(gps_on, ASUS_HOTK_PREFIX "SDON"); /* R2H */
169 ASUS_HANDLE(gps_off, ASUS_HOTK_PREFIX "SDOF"); /* R2H */
170 ASUS_HANDLE(gps_status, ASUS_HOTK_PREFIX "GPST");
173 * This is the main structure, we can use it to store anything interesting
174 * about the hotk device
177 char *name; //laptop name
178 struct acpi_device *device; //the device we are in
179 acpi_handle handle; //the handle of the hotk device
180 char status; //status of the hotk, for LEDs, ...
181 u32 ledd_status; //status of the LED display
182 u8 light_level; //light sensor level
183 u8 light_switch; //light sensor switch value
184 u16 event_count[128]; //count for each event TODO make this better
188 * This header is made available to allow proper configuration given model,
189 * revision number , ... this info cannot go in struct asus_hotk because it is
190 * available before the hotk
192 static struct acpi_table_header *asus_info;
194 /* The actual device the driver binds to */
195 static struct asus_hotk *hotk;
198 * The hotkey driver declaration
200 static int asus_hotk_add(struct acpi_device *device);
201 static int asus_hotk_remove(struct acpi_device *device, int type);
202 static struct acpi_driver asus_hotk_driver = {
203 .name = ASUS_HOTK_NAME,
204 .class = ASUS_HOTK_CLASS,
205 .ids = ASUS_HOTK_HID,
207 .add = asus_hotk_add,
208 .remove = asus_hotk_remove,
212 /* The backlight device /sys/class/backlight */
213 static struct backlight_device *asus_backlight_device;
216 * The backlight class declaration
218 static int read_brightness(struct backlight_device *bd);
219 static int update_bl_status(struct backlight_device *bd);
220 static struct backlight_ops asusbl_ops = {
221 .get_brightness = read_brightness,
222 .update_status = update_bl_status,
225 /* These functions actually update the LED's, and are called from a
226 * workqueue. By doing this as separate work rather than when the LED
227 * subsystem asks, we avoid messing with the Asus ACPI stuff during a
228 * potentially bad time, such as a timer interrupt. */
229 static struct workqueue_struct *led_workqueue;
231 #define ASUS_LED(object, ledname) \
232 static void object##_led_set(struct led_classdev *led_cdev, \
233 enum led_brightness value); \
234 static void object##_led_update(struct work_struct *ignored); \
235 static int object##_led_wk; \
236 static DECLARE_WORK(object##_led_work, object##_led_update); \
237 static struct led_classdev object##_led = { \
238 .name = "asus:" ledname, \
239 .brightness_set = object##_led_set, \
242 ASUS_LED(mled, "mail");
243 ASUS_LED(tled, "touchpad");
244 ASUS_LED(rled, "record");
245 ASUS_LED(pled, "phone");
246 ASUS_LED(gled, "gaming");
249 * This function evaluates an ACPI method, given an int as parameter, the
250 * method is searched within the scope of the handle, can be NULL. The output
251 * of the method is written is output, which can also be NULL
253 * returns 1 if write is successful, 0 else.
255 static int write_acpi_int(acpi_handle handle, const char *method, int val,
256 struct acpi_buffer *output)
258 struct acpi_object_list params; //list of input parameters (an int here)
259 union acpi_object in_obj; //the only param we use
263 params.pointer = &in_obj;
264 in_obj.type = ACPI_TYPE_INTEGER;
265 in_obj.integer.value = val;
267 status = acpi_evaluate_object(handle, (char *)method, ¶ms, output);
268 return (status == AE_OK);
271 static int read_wireless_status(int mask)
274 acpi_status rv = AE_OK;
276 if (!wireless_status_handle)
277 return (hotk->status & mask) ? 1 : 0;
279 rv = acpi_evaluate_integer(wireless_status_handle, NULL, NULL, &status);
280 if (ACPI_FAILURE(rv))
281 printk(ASUS_WARNING "Error reading Wireless status\n");
283 return (status & mask) ? 1 : 0;
285 return (hotk->status & mask) ? 1 : 0;
288 static int read_gps_status(void)
291 acpi_status rv = AE_OK;
293 rv = acpi_evaluate_integer(gps_status_handle, NULL, NULL, &status);
294 if (ACPI_FAILURE(rv))
295 printk(ASUS_WARNING "Error reading GPS status\n");
297 return status ? 1 : 0;
299 return (hotk->status & GPS_ON) ? 1 : 0;
302 /* Generic LED functions */
303 static int read_status(int mask)
305 /* There is a special method for both wireless devices */
306 if (mask == BT_ON || mask == WL_ON)
307 return read_wireless_status(mask);
308 else if (mask == GPS_ON)
309 return read_gps_status();
311 return (hotk->status & mask) ? 1 : 0;
314 static void write_status(acpi_handle handle, int out, int mask)
316 hotk->status = (out) ? (hotk->status | mask) : (hotk->status & ~mask);
323 out = (out & 0x1) + 1;
326 handle = (out) ? gps_on_handle : gps_off_handle;
334 if (handle && !write_acpi_int(handle, NULL, out, NULL))
335 printk(ASUS_WARNING " write failed %x\n", mask);
338 /* /sys/class/led handlers */
339 #define ASUS_LED_HANDLER(object, mask) \
340 static void object##_led_set(struct led_classdev *led_cdev, \
341 enum led_brightness value) \
343 object##_led_wk = value; \
344 queue_work(led_workqueue, &object##_led_work); \
346 static void object##_led_update(struct work_struct *ignored) \
348 int value = object##_led_wk; \
349 write_status(object##_set_handle, value, (mask)); \
352 ASUS_LED_HANDLER(mled, MLED_ON);
353 ASUS_LED_HANDLER(pled, PLED_ON);
354 ASUS_LED_HANDLER(rled, RLED_ON);
355 ASUS_LED_HANDLER(tled, TLED_ON);
356 ASUS_LED_HANDLER(gled, GLED_ON);
358 static int get_lcd_state(void)
360 return read_status(LCD_ON);
363 static int set_lcd_state(int value)
366 acpi_status status = 0;
370 if (lcd == get_lcd_state())
373 if (lcd_switch_handle) {
374 status = acpi_evaluate_object(lcd_switch_handle,
377 if (ACPI_FAILURE(status))
378 printk(ASUS_WARNING "Error switching LCD\n");
381 write_status(NULL, lcd, LCD_ON);
385 static void lcd_blank(int blank)
387 struct backlight_device *bd = asus_backlight_device;
390 bd->props.power = blank;
391 backlight_update_status(bd);
395 static int read_brightness(struct backlight_device *bd)
398 acpi_status rv = AE_OK;
400 rv = acpi_evaluate_integer(brightness_get_handle, NULL, NULL, &value);
401 if (ACPI_FAILURE(rv))
402 printk(ASUS_WARNING "Error reading brightness\n");
407 static int set_brightness(struct backlight_device *bd, int value)
411 value = (0 < value) ? ((15 < value) ? 15 : value) : 0;
412 /* 0 <= value <= 15 */
414 if (!write_acpi_int(brightness_set_handle, NULL, value, NULL)) {
415 printk(ASUS_WARNING "Error changing brightness\n");
422 static int update_bl_status(struct backlight_device *bd)
425 int value = bd->props.brightness;
427 rv = set_brightness(bd, value);
431 value = (bd->props.power == FB_BLANK_UNBLANK) ? 1 : 0;
432 return set_lcd_state(value);
436 * Platform device handlers
440 * We write our info in page, we begin at offset off and cannot write more
441 * than count bytes. We set eof to 1 if we handle those 2 values. We return the
442 * number of bytes written in page
444 static ssize_t show_infos(struct device *dev,
445 struct device_attribute *attr, char *page)
449 char buf[16]; //enough for all info
450 acpi_status rv = AE_OK;
453 * We use the easy way, we don't care of off and count, so we don't set eof
457 len += sprintf(page, ASUS_HOTK_NAME " " ASUS_LAPTOP_VERSION "\n");
458 len += sprintf(page + len, "Model reference : %s\n", hotk->name);
460 * The SFUN method probably allows the original driver to get the list
461 * of features supported by a given model. For now, 0x0100 or 0x0800
462 * bit signifies that the laptop is equipped with a Wi-Fi MiniPCI card.
463 * The significance of others is yet to be found.
465 rv = acpi_evaluate_integer(hotk->handle, "SFUN", NULL, &temp);
466 if (!ACPI_FAILURE(rv))
467 len += sprintf(page + len, "SFUN value : 0x%04x\n",
470 * Another value for userspace: the ASYM method returns 0x02 for
471 * battery low and 0x04 for battery critical, its readings tend to be
472 * more accurate than those provided by _BST.
473 * Note: since not all the laptops provide this method, errors are
476 rv = acpi_evaluate_integer(hotk->handle, "ASYM", NULL, &temp);
477 if (!ACPI_FAILURE(rv))
478 len += sprintf(page + len, "ASYM value : 0x%04x\n",
481 snprintf(buf, 16, "%d", asus_info->length);
482 len += sprintf(page + len, "DSDT length : %s\n", buf);
483 snprintf(buf, 16, "%d", asus_info->checksum);
484 len += sprintf(page + len, "DSDT checksum : %s\n", buf);
485 snprintf(buf, 16, "%d", asus_info->revision);
486 len += sprintf(page + len, "DSDT revision : %s\n", buf);
487 snprintf(buf, 7, "%s", asus_info->oem_id);
488 len += sprintf(page + len, "OEM id : %s\n", buf);
489 snprintf(buf, 9, "%s", asus_info->oem_table_id);
490 len += sprintf(page + len, "OEM table id : %s\n", buf);
491 snprintf(buf, 16, "%x", asus_info->oem_revision);
492 len += sprintf(page + len, "OEM revision : 0x%s\n", buf);
493 snprintf(buf, 5, "%s", asus_info->asl_compiler_id);
494 len += sprintf(page + len, "ASL comp vendor id : %s\n", buf);
495 snprintf(buf, 16, "%x", asus_info->asl_compiler_revision);
496 len += sprintf(page + len, "ASL comp revision : 0x%s\n", buf);
502 static int parse_arg(const char *buf, unsigned long count, int *val)
508 if (sscanf(buf, "%i", val) != 1)
513 static ssize_t store_status(const char *buf, size_t count,
514 acpi_handle handle, int mask)
519 rv = parse_arg(buf, count, &value);
523 write_status(handle, out, mask);
531 static ssize_t show_ledd(struct device *dev,
532 struct device_attribute *attr, char *buf)
534 return sprintf(buf, "0x%08x\n", hotk->ledd_status);
537 static ssize_t store_ledd(struct device *dev, struct device_attribute *attr,
538 const char *buf, size_t count)
542 rv = parse_arg(buf, count, &value);
544 if (!write_acpi_int(ledd_set_handle, NULL, value, NULL))
545 printk(ASUS_WARNING "LED display write failed\n");
547 hotk->ledd_status = (u32) value;
555 static ssize_t show_wlan(struct device *dev,
556 struct device_attribute *attr, char *buf)
558 return sprintf(buf, "%d\n", read_status(WL_ON));
561 static ssize_t store_wlan(struct device *dev, struct device_attribute *attr,
562 const char *buf, size_t count)
564 return store_status(buf, count, wl_switch_handle, WL_ON);
570 static ssize_t show_bluetooth(struct device *dev,
571 struct device_attribute *attr, char *buf)
573 return sprintf(buf, "%d\n", read_status(BT_ON));
576 static ssize_t store_bluetooth(struct device *dev,
577 struct device_attribute *attr, const char *buf,
580 return store_status(buf, count, bt_switch_handle, BT_ON);
586 static void set_display(int value)
588 /* no sanity check needed for now */
589 if (!write_acpi_int(display_set_handle, NULL, value, NULL))
590 printk(ASUS_WARNING "Error setting display\n");
594 static int read_display(void)
597 acpi_status rv = AE_OK;
599 /* In most of the case, we know how to set the display, but sometime
601 if (display_get_handle) {
602 rv = acpi_evaluate_integer(display_get_handle, NULL,
604 if (ACPI_FAILURE(rv))
605 printk(ASUS_WARNING "Error reading display status\n");
608 value &= 0x0F; /* needed for some models, shouldn't hurt others */
614 * Now, *this* one could be more user-friendly, but so far, no-one has
615 * complained. The significance of bits is the same as in store_disp()
617 static ssize_t show_disp(struct device *dev,
618 struct device_attribute *attr, char *buf)
620 return sprintf(buf, "%d\n", read_display());
624 * Experimental support for display switching. As of now: 1 should activate
625 * the LCD output, 2 should do for CRT, 4 for TV-Out and 8 for DVI.
626 * Any combination (bitwise) of these will suffice. I never actually tested 4
627 * displays hooked up simultaneously, so be warned. See the acpi4asus README
630 static ssize_t store_disp(struct device *dev, struct device_attribute *attr,
631 const char *buf, size_t count)
635 rv = parse_arg(buf, count, &value);
644 static void set_light_sens_switch(int value)
646 if (!write_acpi_int(ls_switch_handle, NULL, value, NULL))
647 printk(ASUS_WARNING "Error setting light sensor switch\n");
648 hotk->light_switch = value;
651 static ssize_t show_lssw(struct device *dev,
652 struct device_attribute *attr, char *buf)
654 return sprintf(buf, "%d\n", hotk->light_switch);
657 static ssize_t store_lssw(struct device *dev, struct device_attribute *attr,
658 const char *buf, size_t count)
662 rv = parse_arg(buf, count, &value);
664 set_light_sens_switch(value ? 1 : 0);
669 static void set_light_sens_level(int value)
671 if (!write_acpi_int(ls_level_handle, NULL, value, NULL))
672 printk(ASUS_WARNING "Error setting light sensor level\n");
673 hotk->light_level = value;
676 static ssize_t show_lslvl(struct device *dev,
677 struct device_attribute *attr, char *buf)
679 return sprintf(buf, "%d\n", hotk->light_level);
682 static ssize_t store_lslvl(struct device *dev, struct device_attribute *attr,
683 const char *buf, size_t count)
687 rv = parse_arg(buf, count, &value);
689 value = (0 < value) ? ((15 < value) ? 15 : value) : 0;
690 /* 0 <= value <= 15 */
691 set_light_sens_level(value);
700 static ssize_t show_gps(struct device *dev,
701 struct device_attribute *attr, char *buf)
703 return sprintf(buf, "%d\n", read_status(GPS_ON));
706 static ssize_t store_gps(struct device *dev, struct device_attribute *attr,
707 const char *buf, size_t count)
709 return store_status(buf, count, NULL, GPS_ON);
712 static void asus_hotk_notify(acpi_handle handle, u32 event, void *data)
714 /* TODO Find a better way to handle events count. */
719 * We need to tell the backlight device when the backlight power is
722 if (event == ATKD_LCD_ON) {
723 write_status(NULL, 1, LCD_ON);
724 lcd_blank(FB_BLANK_UNBLANK);
725 } else if (event == ATKD_LCD_OFF) {
726 write_status(NULL, 0, LCD_ON);
727 lcd_blank(FB_BLANK_POWERDOWN);
730 acpi_bus_generate_event(hotk->device, event,
731 hotk->event_count[event % 128]++);
736 #define ASUS_CREATE_DEVICE_ATTR(_name) \
737 struct device_attribute dev_attr_##_name = { \
739 .name = __stringify(_name), \
745 #define ASUS_SET_DEVICE_ATTR(_name, _mode, _show, _store) \
747 dev_attr_##_name.attr.mode = _mode; \
748 dev_attr_##_name.show = _show; \
749 dev_attr_##_name.store = _store; \
752 static ASUS_CREATE_DEVICE_ATTR(infos);
753 static ASUS_CREATE_DEVICE_ATTR(wlan);
754 static ASUS_CREATE_DEVICE_ATTR(bluetooth);
755 static ASUS_CREATE_DEVICE_ATTR(display);
756 static ASUS_CREATE_DEVICE_ATTR(ledd);
757 static ASUS_CREATE_DEVICE_ATTR(ls_switch);
758 static ASUS_CREATE_DEVICE_ATTR(ls_level);
759 static ASUS_CREATE_DEVICE_ATTR(gps);
761 static struct attribute *asuspf_attributes[] = {
762 &dev_attr_infos.attr,
764 &dev_attr_bluetooth.attr,
765 &dev_attr_display.attr,
767 &dev_attr_ls_switch.attr,
768 &dev_attr_ls_level.attr,
773 static struct attribute_group asuspf_attribute_group = {
774 .attrs = asuspf_attributes
777 static struct platform_driver asuspf_driver = {
779 .name = ASUS_HOTK_FILE,
780 .owner = THIS_MODULE,
784 static struct platform_device *asuspf_device;
786 static void asus_hotk_add_fs(void)
788 ASUS_SET_DEVICE_ATTR(infos, 0444, show_infos, NULL);
790 if (wl_switch_handle)
791 ASUS_SET_DEVICE_ATTR(wlan, 0644, show_wlan, store_wlan);
793 if (bt_switch_handle)
794 ASUS_SET_DEVICE_ATTR(bluetooth, 0644,
795 show_bluetooth, store_bluetooth);
797 if (display_set_handle && display_get_handle)
798 ASUS_SET_DEVICE_ATTR(display, 0644, show_disp, store_disp);
799 else if (display_set_handle)
800 ASUS_SET_DEVICE_ATTR(display, 0200, NULL, store_disp);
803 ASUS_SET_DEVICE_ATTR(ledd, 0644, show_ledd, store_ledd);
805 if (ls_switch_handle && ls_level_handle) {
806 ASUS_SET_DEVICE_ATTR(ls_level, 0644, show_lslvl, store_lslvl);
807 ASUS_SET_DEVICE_ATTR(ls_switch, 0644, show_lssw, store_lssw);
810 if (gps_status_handle && gps_on_handle && gps_off_handle)
811 ASUS_SET_DEVICE_ATTR(gps, 0644, show_gps, store_gps);
814 static int asus_handle_init(char *name, acpi_handle * handle,
815 char **paths, int num_paths)
820 for (i = 0; i < num_paths; i++) {
821 status = acpi_get_handle(NULL, paths[i], handle);
822 if (ACPI_SUCCESS(status))
830 #define ASUS_HANDLE_INIT(object) \
831 asus_handle_init(#object, &object##_handle, object##_paths, \
832 ARRAY_SIZE(object##_paths))
835 * This function is used to initialize the hotk with right values. In this
836 * method, we can make all the detection we want, and modify the hotk struct
838 static int asus_hotk_get_info(void)
840 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
841 union acpi_object *model = NULL;
842 ulong bsts_result, hwrs_result;
847 * Get DSDT headers early enough to allow for differentiating between
848 * models, but late enough to allow acpi_bus_register_driver() to fail
849 * before doing anything ACPI-specific. Should we encounter a machine,
850 * which needs special handling (i.e. its hotkey device has a different
851 * HID), this bit will be moved. A global variable asus_info contains
854 status = acpi_get_table(ACPI_SIG_DSDT, 1, &asus_info);
855 if (ACPI_FAILURE(status))
856 printk(ASUS_WARNING "Couldn't get the DSDT table header\n");
858 /* We have to write 0 on init this far for all ASUS models */
859 if (!write_acpi_int(hotk->handle, "INIT", 0, &buffer)) {
860 printk(ASUS_ERR "Hotkey initialization failed\n");
864 /* This needs to be called for some laptops to init properly */
866 acpi_evaluate_integer(hotk->handle, "BSTS", NULL, &bsts_result);
867 if (ACPI_FAILURE(status))
868 printk(ASUS_WARNING "Error calling BSTS\n");
869 else if (bsts_result)
870 printk(ASUS_NOTICE "BSTS called, 0x%02x returned\n",
874 write_acpi_int(hotk->handle, "CWAP", wapf, NULL);
877 * Try to match the object returned by INIT to the specific model.
878 * Handle every possible object (or the lack of thereof) the DSDT
879 * writers might throw at us. When in trouble, we pass NULL to
880 * asus_model_match() and try something completely different.
882 if (buffer.pointer) {
883 model = buffer.pointer;
884 switch (model->type) {
885 case ACPI_TYPE_STRING:
886 string = model->string.pointer;
888 case ACPI_TYPE_BUFFER:
889 string = model->buffer.pointer;
896 hotk->name = kstrdup(string, GFP_KERNEL);
901 printk(ASUS_NOTICE " %s model detected\n", string);
903 ASUS_HANDLE_INIT(mled_set);
904 ASUS_HANDLE_INIT(tled_set);
905 ASUS_HANDLE_INIT(rled_set);
906 ASUS_HANDLE_INIT(pled_set);
907 ASUS_HANDLE_INIT(gled_set);
909 ASUS_HANDLE_INIT(ledd_set);
912 * The HWRS method return informations about the hardware.
913 * 0x80 bit is for WLAN, 0x100 for Bluetooth.
914 * The significance of others is yet to be found.
915 * If we don't find the method, we assume the device are present.
918 acpi_evaluate_integer(hotk->handle, "HRWS", NULL, &hwrs_result);
919 if (ACPI_FAILURE(status))
920 hwrs_result = WL_HWRS | BT_HWRS;
922 if (hwrs_result & WL_HWRS)
923 ASUS_HANDLE_INIT(wl_switch);
924 if (hwrs_result & BT_HWRS)
925 ASUS_HANDLE_INIT(bt_switch);
927 ASUS_HANDLE_INIT(wireless_status);
929 ASUS_HANDLE_INIT(brightness_set);
930 ASUS_HANDLE_INIT(brightness_get);
932 ASUS_HANDLE_INIT(lcd_switch);
934 ASUS_HANDLE_INIT(display_set);
935 ASUS_HANDLE_INIT(display_get);
937 /* There is a lot of models with "ALSL", but a few get
938 a real light sens, so we need to check it. */
939 if (!ASUS_HANDLE_INIT(ls_switch))
940 ASUS_HANDLE_INIT(ls_level);
942 ASUS_HANDLE_INIT(gps_on);
943 ASUS_HANDLE_INIT(gps_off);
944 ASUS_HANDLE_INIT(gps_status);
951 static int asus_hotk_check(void)
955 result = acpi_bus_get_status(hotk->device);
959 if (hotk->device->status.present) {
960 result = asus_hotk_get_info();
962 printk(ASUS_ERR "Hotkey device not present, aborting\n");
969 static int asus_hotk_found;
971 static int asus_hotk_add(struct acpi_device *device)
973 acpi_status status = AE_OK;
979 printk(ASUS_NOTICE "Asus Laptop Support version %s\n",
980 ASUS_LAPTOP_VERSION);
982 hotk = kzalloc(sizeof(struct asus_hotk), GFP_KERNEL);
986 hotk->handle = device->handle;
987 strcpy(acpi_device_name(device), ASUS_HOTK_DEVICE_NAME);
988 strcpy(acpi_device_class(device), ASUS_HOTK_CLASS);
989 acpi_driver_data(device) = hotk;
990 hotk->device = device;
992 result = asus_hotk_check();
999 * We install the handler, it will receive the hotk in parameter, so, we
1000 * could add other data to the hotk struct
1002 status = acpi_install_notify_handler(hotk->handle, ACPI_ALL_NOTIFY,
1003 asus_hotk_notify, hotk);
1004 if (ACPI_FAILURE(status))
1005 printk(ASUS_ERR "Error installing notify handler\n");
1007 asus_hotk_found = 1;
1009 /* WLED and BLED are on by default */
1010 write_status(bt_switch_handle, 1, BT_ON);
1011 write_status(wl_switch_handle, 1, WL_ON);
1013 /* If the h/w switch is off, we need to check the real status */
1014 write_status(NULL, read_status(BT_ON), BT_ON);
1015 write_status(NULL, read_status(WL_ON), WL_ON);
1017 /* LCD Backlight is on by default */
1018 write_status(NULL, 1, LCD_ON);
1020 /* LED display is off by default */
1021 hotk->ledd_status = 0xFFF;
1023 /* Set initial values of light sensor and level */
1024 hotk->light_switch = 1; /* Default to light sensor disabled */
1025 hotk->light_level = 0; /* level 5 for sensor sensitivity */
1027 if (ls_switch_handle)
1028 set_light_sens_switch(hotk->light_switch);
1030 if (ls_level_handle)
1031 set_light_sens_level(hotk->light_level);
1033 /* GPS is on by default */
1034 write_status(NULL, 1, GPS_ON);
1045 static int asus_hotk_remove(struct acpi_device *device, int type)
1047 acpi_status status = 0;
1049 if (!device || !acpi_driver_data(device))
1052 status = acpi_remove_notify_handler(hotk->handle, ACPI_ALL_NOTIFY,
1054 if (ACPI_FAILURE(status))
1055 printk(ASUS_ERR "Error removing notify handler\n");
1063 static void asus_backlight_exit(void)
1065 if (asus_backlight_device)
1066 backlight_device_unregister(asus_backlight_device);
1069 #define ASUS_LED_UNREGISTER(object) \
1070 led_classdev_unregister(&object##_led)
1072 static void asus_led_exit(void)
1074 destroy_workqueue(led_workqueue);
1075 ASUS_LED_UNREGISTER(mled);
1076 ASUS_LED_UNREGISTER(tled);
1077 ASUS_LED_UNREGISTER(pled);
1078 ASUS_LED_UNREGISTER(rled);
1079 ASUS_LED_UNREGISTER(gled);
1082 static void __exit asus_laptop_exit(void)
1084 asus_backlight_exit();
1087 acpi_bus_unregister_driver(&asus_hotk_driver);
1088 sysfs_remove_group(&asuspf_device->dev.kobj, &asuspf_attribute_group);
1089 platform_device_unregister(asuspf_device);
1090 platform_driver_unregister(&asuspf_driver);
1093 static int asus_backlight_init(struct device *dev)
1095 struct backlight_device *bd;
1097 if (brightness_set_handle && lcd_switch_handle) {
1098 bd = backlight_device_register(ASUS_HOTK_FILE, dev,
1102 "Could not register asus backlight device\n");
1103 asus_backlight_device = NULL;
1107 asus_backlight_device = bd;
1109 bd->props.max_brightness = 15;
1110 bd->props.brightness = read_brightness(NULL);
1111 bd->props.power = FB_BLANK_UNBLANK;
1112 backlight_update_status(bd);
1117 static int asus_led_register(acpi_handle handle,
1118 struct led_classdev *ldev, struct device *dev)
1123 return led_classdev_register(dev, ldev);
1126 #define ASUS_LED_REGISTER(object, device) \
1127 asus_led_register(object##_set_handle, &object##_led, device)
1129 static int asus_led_init(struct device *dev)
1133 rv = ASUS_LED_REGISTER(mled, dev);
1137 rv = ASUS_LED_REGISTER(tled, dev);
1141 rv = ASUS_LED_REGISTER(rled, dev);
1145 rv = ASUS_LED_REGISTER(pled, dev);
1149 rv = ASUS_LED_REGISTER(gled, dev);
1153 led_workqueue = create_singlethread_workqueue("led_workqueue");
1160 ASUS_LED_UNREGISTER(gled);
1162 ASUS_LED_UNREGISTER(pled);
1164 ASUS_LED_UNREGISTER(rled);
1166 ASUS_LED_UNREGISTER(tled);
1168 ASUS_LED_UNREGISTER(mled);
1173 static int __init asus_laptop_init(void)
1181 result = acpi_bus_register_driver(&asus_hotk_driver);
1186 * This is a bit of a kludge. We only want this module loaded
1187 * for ASUS systems, but there's currently no way to probe the
1188 * ACPI namespace for ASUS HIDs. So we just return failure if
1189 * we didn't find one, which will cause the module to be
1192 if (!asus_hotk_found) {
1193 acpi_bus_unregister_driver(&asus_hotk_driver);
1197 dev = acpi_get_physical_device(hotk->device->handle);
1199 result = asus_backlight_init(dev);
1201 goto fail_backlight;
1203 result = asus_led_init(dev);
1207 /* Register platform stuff */
1208 result = platform_driver_register(&asuspf_driver);
1210 goto fail_platform_driver;
1212 asuspf_device = platform_device_alloc(ASUS_HOTK_FILE, -1);
1213 if (!asuspf_device) {
1215 goto fail_platform_device1;
1218 result = platform_device_add(asuspf_device);
1220 goto fail_platform_device2;
1222 result = sysfs_create_group(&asuspf_device->dev.kobj,
1223 &asuspf_attribute_group);
1230 platform_device_del(asuspf_device);
1232 fail_platform_device2:
1233 platform_device_put(asuspf_device);
1235 fail_platform_device1:
1236 platform_driver_unregister(&asuspf_driver);
1238 fail_platform_driver:
1242 asus_backlight_exit();
1249 module_init(asus_laptop_init);
1250 module_exit(asus_laptop_exit);