2 * asus-laptop.c - Asus Laptop Support
5 * Copyright (C) 2002-2005 Julien Lerouge, 2003-2006 Karol Kozimor
6 * Copyright (C) 2006 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
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 "0.40"
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 LCD_ON 0x40 //LCD backlight
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 #define ASUS_HANDLE(object, paths...) \
98 static acpi_handle object##_handle = NULL; \
99 static char *object##_paths[] = { paths }
102 ASUS_HANDLE(mled_set, ASUS_HOTK_PREFIX "MLED");
103 ASUS_HANDLE(tled_set, ASUS_HOTK_PREFIX "TLED");
104 ASUS_HANDLE(rled_set, ASUS_HOTK_PREFIX "RLED"); /* W1JC */
105 ASUS_HANDLE(pled_set, ASUS_HOTK_PREFIX "PLED"); /* A7J */
108 ASUS_HANDLE(ledd_set, ASUS_HOTK_PREFIX "SLCM");
110 /* Bluetooth and WLAN
111 * WLED and BLED are not handled like other XLED, because in some dsdt
112 * they also control the WLAN/Bluetooth device.
114 ASUS_HANDLE(wl_switch, ASUS_HOTK_PREFIX "WLED");
115 ASUS_HANDLE(bt_switch, ASUS_HOTK_PREFIX "BLED");
116 ASUS_HANDLE(wireless_status, ASUS_HOTK_PREFIX "RSTS"); /* All new models */
119 ASUS_HANDLE(brightness_set, ASUS_HOTK_PREFIX "SPLV");
120 ASUS_HANDLE(brightness_get, ASUS_HOTK_PREFIX "GPLV");
123 ASUS_HANDLE(lcd_switch, "\\_SB.PCI0.SBRG.EC0._Q10", /* All new models */
124 "\\_SB.PCI0.ISA.EC0._Q10", /* A1x */
125 "\\_SB.PCI0.PX40.ECD0._Q10", /* L3C */
126 "\\_SB.PCI0.PX40.EC0.Q10", /* M1A */
127 "\\_SB.PCI0.LPCB.EC0._Q10", /* P30 */
128 "\\_SB.PCI0.PX40.Q10", /* S1x */
129 "\\Q10"); /* A2x, L2D, L3D, M2E */
132 ASUS_HANDLE(display_set, ASUS_HOTK_PREFIX "SDSP");
133 ASUS_HANDLE(display_get, "\\_SB.PCI0.P0P1.VGA.GETD", /* A6B, A6K A6R A7D F3JM L4R M6R A3G
134 M6A M6V VX-1 V6J V6V W3Z */
135 "\\_SB.PCI0.P0P2.VGA.GETD", /* A3E A4K, A4D A4L A6J A7J A8J Z71V M9V
136 S5A M5A z33A W1Jc W2V */
137 "\\_SB.PCI0.P0P3.VGA.GETD", /* A6V A6Q */
138 "\\_SB.PCI0.P0PA.VGA.GETD", /* A6T, A6M */
139 "\\_SB.PCI0.PCI1.VGAC.NMAP", /* L3C */
140 "\\_SB.PCI0.VGA.GETD", /* Z96F */
142 "\\ADVG", /* A4G Z71A W1N W5A W5F M2N M3N M5N M6N S1N S5N */
144 "\\INFB", /* A2H D1 L2D L3D L3H L2E L5D L5C M1A M2E L4L W3V */
145 "\\SSTE"); /* A3F A6F A3N A3L M6N W3N W6A */
147 ASUS_HANDLE(ls_switch, ASUS_HOTK_PREFIX "ALSC"); /* Z71A Z71V */
148 ASUS_HANDLE(ls_level, ASUS_HOTK_PREFIX "ALSL"); /* Z71A Z71V */
151 * This is the main structure, we can use it to store anything interesting
152 * about the hotk device
155 char *name; //laptop name
156 struct acpi_device *device; //the device we are in
157 acpi_handle handle; //the handle of the hotk device
158 char status; //status of the hotk, for LEDs, ...
159 u32 ledd_status; //status of the LED display
160 u8 light_level; //light sensor level
161 u8 light_switch; //light sensor switch value
162 u16 event_count[128]; //count for each event TODO make this better
166 * This header is made available to allow proper configuration given model,
167 * revision number , ... this info cannot go in struct asus_hotk because it is
168 * available before the hotk
170 static struct acpi_table_header *asus_info;
172 /* The actual device the driver binds to */
173 static struct asus_hotk *hotk;
176 * The hotkey driver declaration
178 static int asus_hotk_add(struct acpi_device *device);
179 static int asus_hotk_remove(struct acpi_device *device, int type);
180 static struct acpi_driver asus_hotk_driver = {
181 .name = ASUS_HOTK_NAME,
182 .class = ASUS_HOTK_CLASS,
183 .ids = ASUS_HOTK_HID,
185 .add = asus_hotk_add,
186 .remove = asus_hotk_remove,
190 /* The backlight device /sys/class/backlight */
191 static struct backlight_device *asus_backlight_device;
194 * The backlight class declaration
196 static int read_brightness(struct backlight_device *bd);
197 static int update_bl_status(struct backlight_device *bd);
198 static struct backlight_properties asusbl_data = {
199 .get_brightness = read_brightness,
200 .update_status = update_bl_status,
201 .max_brightness = 15,
204 /* These functions actually update the LED's, and are called from a
205 * workqueue. By doing this as separate work rather than when the LED
206 * subsystem asks, we avoid messing with the Asus ACPI stuff during a
207 * potentially bad time, such as a timer interrupt. */
208 static struct workqueue_struct *led_workqueue;
210 #define ASUS_LED(object, ledname) \
211 static void object##_led_set(struct led_classdev *led_cdev, \
212 enum led_brightness value); \
213 static void object##_led_update(struct work_struct *ignored); \
214 static int object##_led_wk; \
215 DECLARE_WORK(object##_led_work, object##_led_update); \
216 static struct led_classdev object##_led = { \
217 .name = "asus:" ledname, \
218 .brightness_set = object##_led_set, \
221 ASUS_LED(mled, "mail");
222 ASUS_LED(tled, "touchpad");
223 ASUS_LED(rled, "record");
224 ASUS_LED(pled, "phone");
227 * This function evaluates an ACPI method, given an int as parameter, the
228 * method is searched within the scope of the handle, can be NULL. The output
229 * of the method is written is output, which can also be NULL
231 * returns 1 if write is successful, 0 else.
233 static int write_acpi_int(acpi_handle handle, const char *method, int val,
234 struct acpi_buffer *output)
236 struct acpi_object_list params; //list of input parameters (an int here)
237 union acpi_object in_obj; //the only param we use
241 params.pointer = &in_obj;
242 in_obj.type = ACPI_TYPE_INTEGER;
243 in_obj.integer.value = val;
245 status = acpi_evaluate_object(handle, (char *)method, ¶ms, output);
246 return (status == AE_OK);
249 static int read_acpi_int(acpi_handle handle, const char *method, int *val,
250 struct acpi_object_list *params)
252 struct acpi_buffer output;
253 union acpi_object out_obj;
256 output.length = sizeof(out_obj);
257 output.pointer = &out_obj;
259 status = acpi_evaluate_object(handle, (char *)method, params, &output);
260 *val = out_obj.integer.value;
261 return (status == AE_OK) && (out_obj.type == ACPI_TYPE_INTEGER);
264 static int read_wireless_status(int mask)
268 if (!wireless_status_handle)
269 return (hotk->status & mask) ? 1 : 0;
271 if (read_acpi_int(wireless_status_handle, NULL, &status, NULL)) {
272 return (status & mask) ? 1 : 0;
274 printk(ASUS_WARNING "Error reading Wireless status\n");
276 return (hotk->status & mask) ? 1 : 0;
279 /* Generic LED functions */
280 static int read_status(int mask)
282 /* There is a special method for both wireless devices */
283 if (mask == BT_ON || mask == WL_ON)
284 return read_wireless_status(mask);
286 return (hotk->status & mask) ? 1 : 0;
289 static void write_status(acpi_handle handle, int out, int mask, int invert)
291 hotk->status = (out) ? (hotk->status | mask) : (hotk->status & ~mask);
293 if (invert) /* invert target value */
296 if (handle && !write_acpi_int(handle, NULL, out, NULL))
297 printk(ASUS_WARNING " write failed\n");
300 /* /sys/class/led handlers */
301 #define ASUS_LED_HANDLER(object, mask, invert) \
302 static void object##_led_set(struct led_classdev *led_cdev, \
303 enum led_brightness value) \
305 object##_led_wk = value; \
306 queue_work(led_workqueue, &object##_led_work); \
308 static void object##_led_update(struct work_struct *ignored) \
310 int value = object##_led_wk; \
311 write_status(object##_set_handle, value, (mask), (invert)); \
314 ASUS_LED_HANDLER(mled, MLED_ON, 1);
315 ASUS_LED_HANDLER(pled, PLED_ON, 0);
316 ASUS_LED_HANDLER(rled, RLED_ON, 0);
317 ASUS_LED_HANDLER(tled, TLED_ON, 0);
319 static int get_lcd_state(void)
321 return read_status(LCD_ON);
324 static int set_lcd_state(int value)
327 acpi_status status = 0;
331 if (lcd == get_lcd_state())
334 if (lcd_switch_handle) {
335 status = acpi_evaluate_object(lcd_switch_handle,
338 if (ACPI_FAILURE(status))
339 printk(ASUS_WARNING "Error switching LCD\n");
342 write_status(NULL, lcd, LCD_ON, 0);
346 static void lcd_blank(int blank)
348 struct backlight_device *bd = asus_backlight_device;
351 bd->props->power = blank;
352 backlight_update_status(bd);
356 static int read_brightness(struct backlight_device *bd)
360 if (!read_acpi_int(brightness_get_handle, NULL, &value, NULL))
361 printk(ASUS_WARNING "Error reading brightness\n");
366 static int set_brightness(struct backlight_device *bd, int value)
370 value = (0 < value) ? ((15 < value) ? 15 : value) : 0;
371 /* 0 <= value <= 15 */
373 if (!write_acpi_int(brightness_set_handle, NULL, value, NULL)) {
374 printk(ASUS_WARNING "Error changing brightness\n");
381 static int update_bl_status(struct backlight_device *bd)
384 int value = bd->props->brightness;
386 rv = set_brightness(bd, value);
390 value = (bd->props->power == FB_BLANK_UNBLANK) ? 1 : 0;
391 return set_lcd_state(value);
395 * Platform device handlers
399 * We write our info in page, we begin at offset off and cannot write more
400 * than count bytes. We set eof to 1 if we handle those 2 values. We return the
401 * number of bytes written in page
403 static ssize_t show_infos(struct device *dev,
404 struct device_attribute *attr, char *page)
408 char buf[16]; //enough for all info
410 * We use the easy way, we don't care of off and count, so we don't set eof
414 len += sprintf(page, ASUS_HOTK_NAME " " ASUS_LAPTOP_VERSION "\n");
415 len += sprintf(page + len, "Model reference : %s\n", hotk->name);
417 * The SFUN method probably allows the original driver to get the list
418 * of features supported by a given model. For now, 0x0100 or 0x0800
419 * bit signifies that the laptop is equipped with a Wi-Fi MiniPCI card.
420 * The significance of others is yet to be found.
422 if (read_acpi_int(hotk->handle, "SFUN", &temp, NULL))
424 sprintf(page + len, "SFUN value : 0x%04x\n", temp);
426 * Another value for userspace: the ASYM method returns 0x02 for
427 * battery low and 0x04 for battery critical, its readings tend to be
428 * more accurate than those provided by _BST.
429 * Note: since not all the laptops provide this method, errors are
432 if (read_acpi_int(hotk->handle, "ASYM", &temp, NULL))
434 sprintf(page + len, "ASYM value : 0x%04x\n", temp);
436 snprintf(buf, 16, "%d", asus_info->length);
437 len += sprintf(page + len, "DSDT length : %s\n", buf);
438 snprintf(buf, 16, "%d", asus_info->checksum);
439 len += sprintf(page + len, "DSDT checksum : %s\n", buf);
440 snprintf(buf, 16, "%d", asus_info->revision);
441 len += sprintf(page + len, "DSDT revision : %s\n", buf);
442 snprintf(buf, 7, "%s", asus_info->oem_id);
443 len += sprintf(page + len, "OEM id : %s\n", buf);
444 snprintf(buf, 9, "%s", asus_info->oem_table_id);
445 len += sprintf(page + len, "OEM table id : %s\n", buf);
446 snprintf(buf, 16, "%x", asus_info->oem_revision);
447 len += sprintf(page + len, "OEM revision : 0x%s\n", buf);
448 snprintf(buf, 5, "%s", asus_info->asl_compiler_id);
449 len += sprintf(page + len, "ASL comp vendor id : %s\n", buf);
450 snprintf(buf, 16, "%x", asus_info->asl_compiler_revision);
451 len += sprintf(page + len, "ASL comp revision : 0x%s\n", buf);
457 static int parse_arg(const char *buf, unsigned long count, int *val)
463 if (sscanf(buf, "%i", val) != 1)
468 static ssize_t store_status(const char *buf, size_t count,
469 acpi_handle handle, int mask, int invert)
474 rv = parse_arg(buf, count, &value);
478 write_status(handle, out, mask, invert);
486 static ssize_t show_ledd(struct device *dev,
487 struct device_attribute *attr, char *buf)
489 return sprintf(buf, "0x%08x\n", hotk->ledd_status);
492 static ssize_t store_ledd(struct device *dev, struct device_attribute *attr,
493 const char *buf, size_t count)
497 rv = parse_arg(buf, count, &value);
499 if (!write_acpi_int(ledd_set_handle, NULL, value, NULL))
500 printk(ASUS_WARNING "LED display write failed\n");
502 hotk->ledd_status = (u32) value;
510 static ssize_t show_wlan(struct device *dev,
511 struct device_attribute *attr, char *buf)
513 return sprintf(buf, "%d\n", read_status(WL_ON));
516 static ssize_t store_wlan(struct device *dev, struct device_attribute *attr,
517 const char *buf, size_t count)
519 return store_status(buf, count, wl_switch_handle, WL_ON, 0);
525 static ssize_t show_bluetooth(struct device *dev,
526 struct device_attribute *attr, char *buf)
528 return sprintf(buf, "%d\n", read_status(BT_ON));
531 static ssize_t store_bluetooth(struct device *dev,
532 struct device_attribute *attr, const char *buf,
535 return store_status(buf, count, bt_switch_handle, BT_ON, 0);
541 static void set_display(int value)
543 /* no sanity check needed for now */
544 if (!write_acpi_int(display_set_handle, NULL, value, NULL))
545 printk(ASUS_WARNING "Error setting display\n");
549 static int read_display(void)
553 /* In most of the case, we know how to set the display, but sometime
555 if (display_get_handle) {
556 if (!read_acpi_int(display_get_handle, NULL, &value, NULL))
557 printk(ASUS_WARNING "Error reading display status\n");
560 value &= 0x0F; /* needed for some models, shouldn't hurt others */
566 * Now, *this* one could be more user-friendly, but so far, no-one has
567 * complained. The significance of bits is the same as in store_disp()
569 static ssize_t show_disp(struct device *dev,
570 struct device_attribute *attr, char *buf)
572 return sprintf(buf, "%d\n", read_display());
576 * Experimental support for display switching. As of now: 1 should activate
577 * the LCD output, 2 should do for CRT, 4 for TV-Out and 8 for DVI.
578 * Any combination (bitwise) of these will suffice. I never actually tested 4
579 * displays hooked up simultaneously, so be warned. See the acpi4asus README
582 static ssize_t store_disp(struct device *dev, struct device_attribute *attr,
583 const char *buf, size_t count)
587 rv = parse_arg(buf, count, &value);
596 static void set_light_sens_switch(int value)
598 if (!write_acpi_int(ls_switch_handle, NULL, value, NULL))
599 printk(ASUS_WARNING "Error setting light sensor switch\n");
600 hotk->light_switch = value;
603 static ssize_t show_lssw(struct device *dev,
604 struct device_attribute *attr, char *buf)
606 return sprintf(buf, "%d\n", hotk->light_switch);
609 static ssize_t store_lssw(struct device *dev, struct device_attribute *attr,
610 const char *buf, size_t count)
614 rv = parse_arg(buf, count, &value);
616 set_light_sens_switch(value ? 1 : 0);
621 static void set_light_sens_level(int value)
623 if (!write_acpi_int(ls_level_handle, NULL, value, NULL))
624 printk(ASUS_WARNING "Error setting light sensor level\n");
625 hotk->light_level = value;
628 static ssize_t show_lslvl(struct device *dev,
629 struct device_attribute *attr, char *buf)
631 return sprintf(buf, "%d\n", hotk->light_level);
634 static ssize_t store_lslvl(struct device *dev, struct device_attribute *attr,
635 const char *buf, size_t count)
639 rv = parse_arg(buf, count, &value);
641 value = (0 < value) ? ((15 < value) ? 15 : value) : 0;
642 /* 0 <= value <= 15 */
643 set_light_sens_level(value);
649 static void asus_hotk_notify(acpi_handle handle, u32 event, void *data)
651 /* TODO Find a better way to handle events count. */
656 * We need to tell the backlight device when the backlight power is
659 if (event == ATKD_LCD_ON) {
660 write_status(NULL, 1, LCD_ON, 0);
661 lcd_blank(FB_BLANK_UNBLANK);
662 } else if (event == ATKD_LCD_OFF) {
663 write_status(NULL, 0, LCD_ON, 0);
664 lcd_blank(FB_BLANK_POWERDOWN);
667 acpi_bus_generate_event(hotk->device, event,
668 hotk->event_count[event % 128]++);
673 #define ASUS_CREATE_DEVICE_ATTR(_name) \
674 struct device_attribute dev_attr_##_name = { \
676 .name = __stringify(_name), \
678 .owner = THIS_MODULE }, \
683 #define ASUS_SET_DEVICE_ATTR(_name, _mode, _show, _store) \
685 dev_attr_##_name.attr.mode = _mode; \
686 dev_attr_##_name.show = _show; \
687 dev_attr_##_name.store = _store; \
690 static ASUS_CREATE_DEVICE_ATTR(infos);
691 static ASUS_CREATE_DEVICE_ATTR(wlan);
692 static ASUS_CREATE_DEVICE_ATTR(bluetooth);
693 static ASUS_CREATE_DEVICE_ATTR(display);
694 static ASUS_CREATE_DEVICE_ATTR(ledd);
695 static ASUS_CREATE_DEVICE_ATTR(ls_switch);
696 static ASUS_CREATE_DEVICE_ATTR(ls_level);
698 static struct attribute *asuspf_attributes[] = {
699 &dev_attr_infos.attr,
701 &dev_attr_bluetooth.attr,
702 &dev_attr_display.attr,
704 &dev_attr_ls_switch.attr,
705 &dev_attr_ls_level.attr,
709 static struct attribute_group asuspf_attribute_group = {
710 .attrs = asuspf_attributes
713 static struct platform_driver asuspf_driver = {
715 .name = ASUS_HOTK_FILE,
716 .owner = THIS_MODULE,
720 static struct platform_device *asuspf_device;
722 static void asus_hotk_add_fs(void)
724 ASUS_SET_DEVICE_ATTR(infos, 0444, show_infos, NULL);
726 if (wl_switch_handle)
727 ASUS_SET_DEVICE_ATTR(wlan, 0644, show_wlan, store_wlan);
729 if (bt_switch_handle)
730 ASUS_SET_DEVICE_ATTR(bluetooth, 0644,
731 show_bluetooth, store_bluetooth);
733 if (display_set_handle && display_get_handle)
734 ASUS_SET_DEVICE_ATTR(display, 0644, show_disp, store_disp);
735 else if (display_set_handle)
736 ASUS_SET_DEVICE_ATTR(display, 0200, NULL, store_disp);
739 ASUS_SET_DEVICE_ATTR(ledd, 0644, show_ledd, store_ledd);
741 if (ls_switch_handle && ls_level_handle) {
742 ASUS_SET_DEVICE_ATTR(ls_level, 0644, show_lslvl, store_lslvl);
743 ASUS_SET_DEVICE_ATTR(ls_switch, 0644, show_lssw, store_lssw);
747 static int asus_handle_init(char *name, acpi_handle * handle,
748 char **paths, int num_paths)
753 for (i = 0; i < num_paths; i++) {
754 status = acpi_get_handle(NULL, paths[i], handle);
755 if (ACPI_SUCCESS(status))
763 #define ASUS_HANDLE_INIT(object) \
764 asus_handle_init(#object, &object##_handle, object##_paths, \
765 ARRAY_SIZE(object##_paths))
768 * This function is used to initialize the hotk with right values. In this
769 * method, we can make all the detection we want, and modify the hotk struct
771 static int asus_hotk_get_info(void)
773 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
774 union acpi_object *model = NULL;
775 int bsts_result, hwrs_result;
780 * Get DSDT headers early enough to allow for differentiating between
781 * models, but late enough to allow acpi_bus_register_driver() to fail
782 * before doing anything ACPI-specific. Should we encounter a machine,
783 * which needs special handling (i.e. its hotkey device has a different
784 * HID), this bit will be moved. A global variable asus_info contains
787 status = acpi_get_table(ACPI_SIG_DSDT, 1, &asus_info);
788 if (ACPI_FAILURE(status))
789 printk(ASUS_WARNING "Couldn't get the DSDT table header\n");
791 /* We have to write 0 on init this far for all ASUS models */
792 if (!write_acpi_int(hotk->handle, "INIT", 0, &buffer)) {
793 printk(ASUS_ERR "Hotkey initialization failed\n");
797 /* This needs to be called for some laptops to init properly */
798 if (!read_acpi_int(hotk->handle, "BSTS", &bsts_result, NULL))
799 printk(ASUS_WARNING "Error calling BSTS\n");
800 else if (bsts_result)
801 printk(ASUS_NOTICE "BSTS called, 0x%02x returned\n",
805 * Try to match the object returned by INIT to the specific model.
806 * Handle every possible object (or the lack of thereof) the DSDT
807 * writers might throw at us. When in trouble, we pass NULL to
808 * asus_model_match() and try something completely different.
810 if (buffer.pointer) {
811 model = buffer.pointer;
812 switch (model->type) {
813 case ACPI_TYPE_STRING:
814 string = model->string.pointer;
816 case ACPI_TYPE_BUFFER:
817 string = model->buffer.pointer;
824 hotk->name = kstrdup(string, GFP_KERNEL);
829 printk(ASUS_NOTICE " %s model detected\n", string);
831 ASUS_HANDLE_INIT(mled_set);
832 ASUS_HANDLE_INIT(tled_set);
833 ASUS_HANDLE_INIT(rled_set);
834 ASUS_HANDLE_INIT(pled_set);
836 ASUS_HANDLE_INIT(ledd_set);
839 * The HWRS method return informations about the hardware.
840 * 0x80 bit is for WLAN, 0x100 for Bluetooth.
841 * The significance of others is yet to be found.
842 * If we don't find the method, we assume the device are present.
844 if (!read_acpi_int(hotk->handle, "HRWS", &hwrs_result, NULL))
845 hwrs_result = WL_HWRS | BT_HWRS;
847 if (hwrs_result & WL_HWRS)
848 ASUS_HANDLE_INIT(wl_switch);
849 if (hwrs_result & BT_HWRS)
850 ASUS_HANDLE_INIT(bt_switch);
852 ASUS_HANDLE_INIT(wireless_status);
854 ASUS_HANDLE_INIT(brightness_set);
855 ASUS_HANDLE_INIT(brightness_get);
857 ASUS_HANDLE_INIT(lcd_switch);
859 ASUS_HANDLE_INIT(display_set);
860 ASUS_HANDLE_INIT(display_get);
862 /* There is a lot of models with "ALSL", but a few get
863 a real light sens, so we need to check it. */
864 if (ASUS_HANDLE_INIT(ls_switch))
865 ASUS_HANDLE_INIT(ls_level);
872 static int asus_hotk_check(void)
876 result = acpi_bus_get_status(hotk->device);
880 if (hotk->device->status.present) {
881 result = asus_hotk_get_info();
883 printk(ASUS_ERR "Hotkey device not present, aborting\n");
890 static int asus_hotk_found;
892 static int asus_hotk_add(struct acpi_device *device)
894 acpi_status status = AE_OK;
900 printk(ASUS_NOTICE "Asus Laptop Support version %s\n",
901 ASUS_LAPTOP_VERSION);
903 hotk = kmalloc(sizeof(struct asus_hotk), GFP_KERNEL);
906 memset(hotk, 0, sizeof(struct asus_hotk));
908 hotk->handle = device->handle;
909 strcpy(acpi_device_name(device), ASUS_HOTK_DEVICE_NAME);
910 strcpy(acpi_device_class(device), ASUS_HOTK_CLASS);
911 acpi_driver_data(device) = hotk;
912 hotk->device = device;
914 result = asus_hotk_check();
921 * We install the handler, it will receive the hotk in parameter, so, we
922 * could add other data to the hotk struct
924 status = acpi_install_notify_handler(hotk->handle, ACPI_SYSTEM_NOTIFY,
925 asus_hotk_notify, hotk);
926 if (ACPI_FAILURE(status))
927 printk(ASUS_ERR "Error installing notify handler\n");
931 /* WLED and BLED are on by default */
932 write_status(bt_switch_handle, 1, BT_ON, 0);
933 write_status(wl_switch_handle, 1, WL_ON, 0);
935 /* LCD Backlight is on by default */
936 write_status(NULL, 1, LCD_ON, 0);
938 /* LED display is off by default */
939 hotk->ledd_status = 0xFFF;
941 /* Set initial values of light sensor and level */
942 hotk->light_switch = 1; /* Default to light sensor disabled */
943 hotk->light_level = 0; /* level 5 for sensor sensitivity */
945 if (ls_switch_handle)
946 set_light_sens_switch(hotk->light_switch);
949 set_light_sens_level(hotk->light_level);
960 static int asus_hotk_remove(struct acpi_device *device, int type)
962 acpi_status status = 0;
964 if (!device || !acpi_driver_data(device))
967 status = acpi_remove_notify_handler(hotk->handle, ACPI_SYSTEM_NOTIFY,
969 if (ACPI_FAILURE(status))
970 printk(ASUS_ERR "Error removing notify handler\n");
978 static void asus_backlight_exit(void)
980 if (asus_backlight_device)
981 backlight_device_unregister(asus_backlight_device);
984 #define ASUS_LED_UNREGISTER(object) \
985 if(object##_led.class_dev \
986 && !IS_ERR(object##_led.class_dev)) \
987 led_classdev_unregister(&object##_led)
989 static void asus_led_exit(void)
991 ASUS_LED_UNREGISTER(mled);
992 ASUS_LED_UNREGISTER(tled);
993 ASUS_LED_UNREGISTER(pled);
994 ASUS_LED_UNREGISTER(rled);
996 destroy_workqueue(led_workqueue);
999 static void __exit asus_laptop_exit(void)
1001 asus_backlight_exit();
1004 acpi_bus_unregister_driver(&asus_hotk_driver);
1005 sysfs_remove_group(&asuspf_device->dev.kobj, &asuspf_attribute_group);
1006 platform_device_unregister(asuspf_device);
1007 platform_driver_unregister(&asuspf_driver);
1010 static int asus_backlight_init(struct device *dev)
1012 struct backlight_device *bd;
1014 if (brightness_set_handle && lcd_switch_handle) {
1015 bd = backlight_device_register(ASUS_HOTK_FILE, dev,
1016 NULL, &asusbl_data);
1019 "Could not register asus backlight device\n");
1020 asus_backlight_device = NULL;
1024 asus_backlight_device = bd;
1026 bd->props->brightness = read_brightness(NULL);
1027 bd->props->power = FB_BLANK_UNBLANK;
1028 backlight_update_status(bd);
1033 static int asus_led_register(acpi_handle handle,
1034 struct led_classdev *ldev, struct device *dev)
1039 return led_classdev_register(dev, ldev);
1042 #define ASUS_LED_REGISTER(object, device) \
1043 asus_led_register(object##_set_handle, &object##_led, device)
1045 static int asus_led_init(struct device *dev)
1049 rv = ASUS_LED_REGISTER(mled, dev);
1053 rv = ASUS_LED_REGISTER(tled, dev);
1057 rv = ASUS_LED_REGISTER(rled, dev);
1061 rv = ASUS_LED_REGISTER(pled, dev);
1065 led_workqueue = create_singlethread_workqueue("led_workqueue");
1072 static int __init asus_laptop_init(void)
1080 result = acpi_bus_register_driver(&asus_hotk_driver);
1085 * This is a bit of a kludge. We only want this module loaded
1086 * for ASUS systems, but there's currently no way to probe the
1087 * ACPI namespace for ASUS HIDs. So we just return failure if
1088 * we didn't find one, which will cause the module to be
1091 if (!asus_hotk_found) {
1092 acpi_bus_unregister_driver(&asus_hotk_driver);
1096 dev = acpi_get_physical_device(hotk->device->handle);
1098 result = asus_backlight_init(dev);
1100 goto fail_backlight;
1102 result = asus_led_init(dev);
1106 /* Register platform stuff */
1107 result = platform_driver_register(&asuspf_driver);
1109 goto fail_platform_driver;
1111 asuspf_device = platform_device_alloc(ASUS_HOTK_FILE, -1);
1112 if (!asuspf_device) {
1114 goto fail_platform_device1;
1117 result = platform_device_add(asuspf_device);
1119 goto fail_platform_device2;
1121 result = sysfs_create_group(&asuspf_device->dev.kobj,
1122 &asuspf_attribute_group);
1129 platform_device_del(asuspf_device);
1131 fail_platform_device2:
1132 platform_device_put(asuspf_device);
1134 fail_platform_device1:
1135 platform_driver_unregister(&asuspf_driver);
1137 fail_platform_driver:
1141 asus_backlight_exit();
1148 module_init(asus_laptop_init);
1149 module_exit(asus_laptop_exit);