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-rw-r--r--drivers/misc/asus-laptop.c1165
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diff --git a/drivers/misc/asus-laptop.c b/drivers/misc/asus-laptop.c
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1/*
2 * asus-laptop.c - Asus Laptop Support
3 *
4 *
5 * Copyright (C) 2002-2005 Julien Lerouge, 2003-2006 Karol Kozimor
6 * Copyright (C) 2006 Corentin Chary
7 *
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.
12 *
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.
17 *
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
21 *
22 *
23 * The development page for this driver is located at
24 * http://sourceforge.net/projects/acpi4asus/
25 *
26 * Credits:
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 *
34 */
35
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>
44#include <linux/fb.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>
50
51#define ASUS_LAPTOP_VERSION "0.40"
52
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."
59
60/*
61 * Some events we use, same for all Asus
62 */
63#define ATKD_BR_UP 0x10
64#define ATKD_BR_DOWN 0x20
65#define ATKD_LCD_ON 0x33
66#define ATKD_LCD_OFF 0x34
67
68/*
69 * Known bits returned by \_SB.ATKD.HWRS
70 */
71#define WL_HWRS 0x80
72#define BT_HWRS 0x100
73
74/*
75 * Flags for hotk status
76 * WL_ON and BT_ON are also used for wireless_status()
77 */
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
85
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
92
93MODULE_AUTHOR("Julien Lerouge, Karol Kozimor, Corentin Chary");
94MODULE_DESCRIPTION(ASUS_HOTK_NAME);
95MODULE_LICENSE("GPL");
96
97#define ASUS_HANDLE(object, paths...) \
98 static acpi_handle object##_handle = NULL; \
99 static char *object##_paths[] = { paths }
100
101/* LED */
102ASUS_HANDLE(mled_set, ASUS_HOTK_PREFIX "MLED");
103ASUS_HANDLE(tled_set, ASUS_HOTK_PREFIX "TLED");
104ASUS_HANDLE(rled_set, ASUS_HOTK_PREFIX "RLED"); /* W1JC */
105ASUS_HANDLE(pled_set, ASUS_HOTK_PREFIX "PLED"); /* A7J */
106
107/* LEDD */
108ASUS_HANDLE(ledd_set, ASUS_HOTK_PREFIX "SLCM");
109
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.
113 */
114ASUS_HANDLE(wl_switch, ASUS_HOTK_PREFIX "WLED");
115ASUS_HANDLE(bt_switch, ASUS_HOTK_PREFIX "BLED");
116ASUS_HANDLE(wireless_status, ASUS_HOTK_PREFIX "RSTS"); /* All new models */
117
118/* Brightness */
119ASUS_HANDLE(brightness_set, ASUS_HOTK_PREFIX "SPLV");
120ASUS_HANDLE(brightness_get, ASUS_HOTK_PREFIX "GPLV");
121
122/* Backlight */
123ASUS_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 */
130
131/* Display */
132ASUS_HANDLE(display_set, ASUS_HOTK_PREFIX "SDSP");
133ASUS_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 */
141 "\\ACTD", /* A2D */
142 "\\ADVG", /* A4G Z71A W1N W5A W5F M2N M3N M5N M6N S1N S5N */
143 "\\DNXT", /* P30 */
144 "\\INFB", /* A2H D1 L2D L3D L3H L2E L5D L5C M1A M2E L4L W3V */
145 "\\SSTE"); /* A3F A6F A3N A3L M6N W3N W6A */
146
147ASUS_HANDLE(ls_switch, ASUS_HOTK_PREFIX "ALSC"); /* Z71A Z71V */
148ASUS_HANDLE(ls_level, ASUS_HOTK_PREFIX "ALSL"); /* Z71A Z71V */
149
150/*
151 * This is the main structure, we can use it to store anything interesting
152 * about the hotk device
153 */
154struct asus_hotk {
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
163};
164
165/*
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
169 */
170static struct acpi_table_header *asus_info;
171
172/* The actual device the driver binds to */
173static struct asus_hotk *hotk;
174
175/*
176 * The hotkey driver declaration
177 */
178static int asus_hotk_add(struct acpi_device *device);
179static int asus_hotk_remove(struct acpi_device *device, int type);
180static struct acpi_driver asus_hotk_driver = {
181 .name = ASUS_HOTK_NAME,
182 .class = ASUS_HOTK_CLASS,
183 .ids = ASUS_HOTK_HID,
184 .ops = {
185 .add = asus_hotk_add,
186 .remove = asus_hotk_remove,
187 },
188};
189
190/* The backlight device /sys/class/backlight */
191static struct backlight_device *asus_backlight_device;
192
193/*
194 * The backlight class declaration
195 */
196static int read_brightness(struct backlight_device *bd);
197static int update_bl_status(struct backlight_device *bd);
198static struct backlight_properties asusbl_data = {
199 .owner = THIS_MODULE,
200 .get_brightness = read_brightness,
201 .update_status = update_bl_status,
202 .max_brightness = 15,
203};
204
205/* These functions actually update the LED's, and are called from a
206 * workqueue. By doing this as separate work rather than when the LED
207 * subsystem asks, we avoid messing with the Asus ACPI stuff during a
208 * potentially bad time, such as a timer interrupt. */
209static struct workqueue_struct *led_workqueue;
210
211#define ASUS_LED(object, ledname) \
212 static void object##_led_set(struct led_classdev *led_cdev, \
213 enum led_brightness value); \
214 static void object##_led_update(struct work_struct *ignored); \
215 static int object##_led_wk; \
216 DECLARE_WORK(object##_led_work, object##_led_update); \
217 static struct led_classdev object##_led = { \
218 .name = "asus:" ledname, \
219 .brightness_set = object##_led_set, \
220 }
221
222ASUS_LED(mled, "mail");
223ASUS_LED(tled, "touchpad");
224ASUS_LED(rled, "record");
225ASUS_LED(pled, "phone");
226
227/*
228 * This function evaluates an ACPI method, given an int as parameter, the
229 * method is searched within the scope of the handle, can be NULL. The output
230 * of the method is written is output, which can also be NULL
231 *
232 * returns 1 if write is successful, 0 else.
233 */
234static int write_acpi_int(acpi_handle handle, const char *method, int val,
235 struct acpi_buffer *output)
236{
237 struct acpi_object_list params; //list of input parameters (an int here)
238 union acpi_object in_obj; //the only param we use
239 acpi_status status;
240
241 params.count = 1;
242 params.pointer = &in_obj;
243 in_obj.type = ACPI_TYPE_INTEGER;
244 in_obj.integer.value = val;
245
246 status = acpi_evaluate_object(handle, (char *)method, &params, output);
247 return (status == AE_OK);
248}
249
250static int read_acpi_int(acpi_handle handle, const char *method, int *val,
251 struct acpi_object_list *params)
252{
253 struct acpi_buffer output;
254 union acpi_object out_obj;
255 acpi_status status;
256
257 output.length = sizeof(out_obj);
258 output.pointer = &out_obj;
259
260 status = acpi_evaluate_object(handle, (char *)method, params, &output);
261 *val = out_obj.integer.value;
262 return (status == AE_OK) && (out_obj.type == ACPI_TYPE_INTEGER);
263}
264
265static int read_wireless_status(int mask)
266{
267 int status;
268
269 if (!wireless_status_handle)
270 return (hotk->status & mask) ? 1 : 0;
271
272 if (read_acpi_int(wireless_status_handle, NULL, &status, NULL)) {
273 return (status & mask) ? 1 : 0;
274 } else
275 printk(ASUS_WARNING "Error reading Wireless status\n");
276
277 return (hotk->status & mask) ? 1 : 0;
278}
279
280/* Generic LED functions */
281static int read_status(int mask)
282{
283 /* There is a special method for both wireless devices */
284 if (mask == BT_ON || mask == WL_ON)
285 return read_wireless_status(mask);
286
287 return (hotk->status & mask) ? 1 : 0;
288}
289
290static void write_status(acpi_handle handle, int out, int mask, int invert)
291{
292 hotk->status = (out) ? (hotk->status | mask) : (hotk->status & ~mask);
293
294 if (invert) /* invert target value */
295 out = !out & 0x1;
296
297 if (handle && !write_acpi_int(handle, NULL, out, NULL))
298 printk(ASUS_WARNING " write failed\n");
299}
300
301/* /sys/class/led handlers */
302#define ASUS_LED_HANDLER(object, mask, invert) \
303 static void object##_led_set(struct led_classdev *led_cdev, \
304 enum led_brightness value) \
305 { \
306 object##_led_wk = value; \
307 queue_work(led_workqueue, &object##_led_work); \
308 } \
309 static void object##_led_update(struct work_struct *ignored) \
310 { \
311 int value = object##_led_wk; \
312 write_status(object##_set_handle, value, (mask), (invert)); \
313 }
314
315ASUS_LED_HANDLER(mled, MLED_ON, 1);
316ASUS_LED_HANDLER(pled, PLED_ON, 0);
317ASUS_LED_HANDLER(rled, RLED_ON, 0);
318ASUS_LED_HANDLER(tled, TLED_ON, 0);
319
320static int get_lcd_state(void)
321{
322 return read_status(LCD_ON);
323}
324
325static int set_lcd_state(int value)
326{
327 int lcd = 0;
328 acpi_status status = 0;
329
330 lcd = value ? 1 : 0;
331
332 if (lcd == get_lcd_state())
333 return 0;
334
335 if (lcd_switch_handle) {
336 status = acpi_evaluate_object(lcd_switch_handle,
337 NULL, NULL, NULL);
338
339 if (ACPI_FAILURE(status))
340 printk(ASUS_WARNING "Error switching LCD\n");
341 }
342
343 write_status(NULL, lcd, LCD_ON, 0);
344 return 0;
345}
346
347static void lcd_blank(int blank)
348{
349 struct backlight_device *bd = asus_backlight_device;
350
351 if (bd) {
352 down(&bd->sem);
353 if (likely(bd->props)) {
354 bd->props->power = blank;
355 if (likely(bd->props->update_status))
356 bd->props->update_status(bd);
357 }
358 up(&bd->sem);
359 }
360}
361
362static int read_brightness(struct backlight_device *bd)
363{
364 int value;
365
366 if (!read_acpi_int(brightness_get_handle, NULL, &value, NULL))
367 printk(ASUS_WARNING "Error reading brightness\n");
368
369 return value;
370}
371
372static int set_brightness(struct backlight_device *bd, int value)
373{
374 int ret = 0;
375
376 value = (0 < value) ? ((15 < value) ? 15 : value) : 0;
377 /* 0 <= value <= 15 */
378
379 if (!write_acpi_int(brightness_set_handle, NULL, value, NULL)) {
380 printk(ASUS_WARNING "Error changing brightness\n");
381 ret = -EIO;
382 }
383
384 return ret;
385}
386
387static int update_bl_status(struct backlight_device *bd)
388{
389 int rv;
390 int value = bd->props->brightness;
391
392 rv = set_brightness(bd, value);
393 if (rv)
394 return rv;
395
396 value = (bd->props->power == FB_BLANK_UNBLANK) ? 1 : 0;
397 return set_lcd_state(value);
398}
399
400/*
401 * Platform device handlers
402 */
403
404/*
405 * We write our info in page, we begin at offset off and cannot write more
406 * than count bytes. We set eof to 1 if we handle those 2 values. We return the
407 * number of bytes written in page
408 */
409static ssize_t show_infos(struct device *dev,
410 struct device_attribute *attr, char *page)
411{
412 int len = 0;
413 int temp;
414 char buf[16]; //enough for all info
415 /*
416 * We use the easy way, we don't care of off and count, so we don't set eof
417 * to 1
418 */
419
420 len += sprintf(page, ASUS_HOTK_NAME " " ASUS_LAPTOP_VERSION "\n");
421 len += sprintf(page + len, "Model reference : %s\n", hotk->name);
422 /*
423 * The SFUN method probably allows the original driver to get the list
424 * of features supported by a given model. For now, 0x0100 or 0x0800
425 * bit signifies that the laptop is equipped with a Wi-Fi MiniPCI card.
426 * The significance of others is yet to be found.
427 */
428 if (read_acpi_int(hotk->handle, "SFUN", &temp, NULL))
429 len +=
430 sprintf(page + len, "SFUN value : 0x%04x\n", temp);
431 /*
432 * Another value for userspace: the ASYM method returns 0x02 for
433 * battery low and 0x04 for battery critical, its readings tend to be
434 * more accurate than those provided by _BST.
435 * Note: since not all the laptops provide this method, errors are
436 * silently ignored.
437 */
438 if (read_acpi_int(hotk->handle, "ASYM", &temp, NULL))
439 len +=
440 sprintf(page + len, "ASYM value : 0x%04x\n", temp);
441 if (asus_info) {
442 snprintf(buf, 16, "%d", asus_info->length);
443 len += sprintf(page + len, "DSDT length : %s\n", buf);
444 snprintf(buf, 16, "%d", asus_info->checksum);
445 len += sprintf(page + len, "DSDT checksum : %s\n", buf);
446 snprintf(buf, 16, "%d", asus_info->revision);
447 len += sprintf(page + len, "DSDT revision : %s\n", buf);
448 snprintf(buf, 7, "%s", asus_info->oem_id);
449 len += sprintf(page + len, "OEM id : %s\n", buf);
450 snprintf(buf, 9, "%s", asus_info->oem_table_id);
451 len += sprintf(page + len, "OEM table id : %s\n", buf);
452 snprintf(buf, 16, "%x", asus_info->oem_revision);
453 len += sprintf(page + len, "OEM revision : 0x%s\n", buf);
454 snprintf(buf, 5, "%s", asus_info->asl_compiler_id);
455 len += sprintf(page + len, "ASL comp vendor id : %s\n", buf);
456 snprintf(buf, 16, "%x", asus_info->asl_compiler_revision);
457 len += sprintf(page + len, "ASL comp revision : 0x%s\n", buf);
458 }
459
460 return len;
461}
462
463static int parse_arg(const char *buf, unsigned long count, int *val)
464{
465 if (!count)
466 return 0;
467 if (count > 31)
468 return -EINVAL;
469 if (sscanf(buf, "%i", val) != 1)
470 return -EINVAL;
471 return count;
472}
473
474static ssize_t store_status(const char *buf, size_t count,
475 acpi_handle handle, int mask, int invert)
476{
477 int rv, value;
478 int out = 0;
479
480 rv = parse_arg(buf, count, &value);
481 if (rv > 0)
482 out = value ? 1 : 0;
483
484 write_status(handle, out, mask, invert);
485
486 return rv;
487}
488
489/*
490 * LEDD display
491 */
492static ssize_t show_ledd(struct device *dev,
493 struct device_attribute *attr, char *buf)
494{
495 return sprintf(buf, "0x%08x\n", hotk->ledd_status);
496}
497
498static ssize_t store_ledd(struct device *dev, struct device_attribute *attr,
499 const char *buf, size_t count)
500{
501 int rv, value;
502
503 rv = parse_arg(buf, count, &value);
504 if (rv > 0) {
505 if (!write_acpi_int(ledd_set_handle, NULL, value, NULL))
506 printk(ASUS_WARNING "LED display write failed\n");
507 else
508 hotk->ledd_status = (u32) value;
509 }
510 return rv;
511}
512
513/*
514 * WLAN
515 */
516static ssize_t show_wlan(struct device *dev,
517 struct device_attribute *attr, char *buf)
518{
519 return sprintf(buf, "%d\n", read_status(WL_ON));
520}
521
522static ssize_t store_wlan(struct device *dev, struct device_attribute *attr,
523 const char *buf, size_t count)
524{
525 return store_status(buf, count, wl_switch_handle, WL_ON, 0);
526}
527
528/*
529 * Bluetooth
530 */
531static ssize_t show_bluetooth(struct device *dev,
532 struct device_attribute *attr, char *buf)
533{
534 return sprintf(buf, "%d\n", read_status(BT_ON));
535}
536
537static ssize_t store_bluetooth(struct device *dev,
538 struct device_attribute *attr, const char *buf,
539 size_t count)
540{
541 return store_status(buf, count, bt_switch_handle, BT_ON, 0);
542}
543
544/*
545 * Display
546 */
547static void set_display(int value)
548{
549 /* no sanity check needed for now */
550 if (!write_acpi_int(display_set_handle, NULL, value, NULL))
551 printk(ASUS_WARNING "Error setting display\n");
552 return;
553}
554
555static int read_display(void)
556{
557 int value = 0;
558
559 /* In most of the case, we know how to set the display, but sometime
560 we can't read it */
561 if (display_get_handle) {
562 if (!read_acpi_int(display_get_handle, NULL, &value, NULL))
563 printk(ASUS_WARNING "Error reading display status\n");
564 }
565
566 value &= 0x0F; /* needed for some models, shouldn't hurt others */
567
568 return value;
569}
570
571/*
572 * Now, *this* one could be more user-friendly, but so far, no-one has
573 * complained. The significance of bits is the same as in store_disp()
574 */
575static ssize_t show_disp(struct device *dev,
576 struct device_attribute *attr, char *buf)
577{
578 return sprintf(buf, "%d\n", read_display());
579}
580
581/*
582 * Experimental support for display switching. As of now: 1 should activate
583 * the LCD output, 2 should do for CRT, 4 for TV-Out and 8 for DVI.
584 * Any combination (bitwise) of these will suffice. I never actually tested 4
585 * displays hooked up simultaneously, so be warned. See the acpi4asus README
586 * for more info.
587 */
588static ssize_t store_disp(struct device *dev, struct device_attribute *attr,
589 const char *buf, size_t count)
590{
591 int rv, value;
592
593 rv = parse_arg(buf, count, &value);
594 if (rv > 0)
595 set_display(value);
596 return rv;
597}
598
599/*
600 * Light Sens
601 */
602static void set_light_sens_switch(int value)
603{
604 if (!write_acpi_int(ls_switch_handle, NULL, value, NULL))
605 printk(ASUS_WARNING "Error setting light sensor switch\n");
606 hotk->light_switch = value;
607}
608
609static ssize_t show_lssw(struct device *dev,
610 struct device_attribute *attr, char *buf)
611{
612 return sprintf(buf, "%d\n", hotk->light_switch);
613}
614
615static ssize_t store_lssw(struct device *dev, struct device_attribute *attr,
616 const char *buf, size_t count)
617{
618 int rv, value;
619
620 rv = parse_arg(buf, count, &value);
621 if (rv > 0)
622 set_light_sens_switch(value ? 1 : 0);
623
624 return rv;
625}
626
627static void set_light_sens_level(int value)
628{
629 if (!write_acpi_int(ls_level_handle, NULL, value, NULL))
630 printk(ASUS_WARNING "Error setting light sensor level\n");
631 hotk->light_level = value;
632}
633
634static ssize_t show_lslvl(struct device *dev,
635 struct device_attribute *attr, char *buf)
636{
637 return sprintf(buf, "%d\n", hotk->light_level);
638}
639
640static ssize_t store_lslvl(struct device *dev, struct device_attribute *attr,
641 const char *buf, size_t count)
642{
643 int rv, value;
644
645 rv = parse_arg(buf, count, &value);
646 if (rv > 0) {
647 value = (0 < value) ? ((15 < value) ? 15 : value) : 0;
648 /* 0 <= value <= 15 */
649 set_light_sens_level(value);
650 }
651
652 return rv;
653}
654
655static void asus_hotk_notify(acpi_handle handle, u32 event, void *data)
656{
657 /* TODO Find a better way to handle events count. */
658 if (!hotk)
659 return;
660
661 /*
662 * We need to tell the backlight device when the backlight power is
663 * switched
664 */
665 if (event == ATKD_LCD_ON) {
666 write_status(NULL, 1, LCD_ON, 0);
667 lcd_blank(FB_BLANK_UNBLANK);
668 } else if (event == ATKD_LCD_OFF) {
669 write_status(NULL, 0, LCD_ON, 0);
670 lcd_blank(FB_BLANK_POWERDOWN);
671 }
672
673 acpi_bus_generate_event(hotk->device, event,
674 hotk->event_count[event % 128]++);
675
676 return;
677}
678
679#define ASUS_CREATE_DEVICE_ATTR(_name) \
680 struct device_attribute dev_attr_##_name = { \
681 .attr = { \
682 .name = __stringify(_name), \
683 .mode = 0, \
684 .owner = THIS_MODULE }, \
685 .show = NULL, \
686 .store = NULL, \
687 }
688
689#define ASUS_SET_DEVICE_ATTR(_name, _mode, _show, _store) \
690 do { \
691 dev_attr_##_name.attr.mode = _mode; \
692 dev_attr_##_name.show = _show; \
693 dev_attr_##_name.store = _store; \
694 } while(0)
695
696static ASUS_CREATE_DEVICE_ATTR(infos);
697static ASUS_CREATE_DEVICE_ATTR(wlan);
698static ASUS_CREATE_DEVICE_ATTR(bluetooth);
699static ASUS_CREATE_DEVICE_ATTR(display);
700static ASUS_CREATE_DEVICE_ATTR(ledd);
701static ASUS_CREATE_DEVICE_ATTR(ls_switch);
702static ASUS_CREATE_DEVICE_ATTR(ls_level);
703
704static struct attribute *asuspf_attributes[] = {
705 &dev_attr_infos.attr,
706 &dev_attr_wlan.attr,
707 &dev_attr_bluetooth.attr,
708 &dev_attr_display.attr,
709 &dev_attr_ledd.attr,
710 &dev_attr_ls_switch.attr,
711 &dev_attr_ls_level.attr,
712 NULL
713};
714
715static struct attribute_group asuspf_attribute_group = {
716 .attrs = asuspf_attributes
717};
718
719static struct platform_driver asuspf_driver = {
720 .driver = {
721 .name = ASUS_HOTK_FILE,
722 .owner = THIS_MODULE,
723 }
724};
725
726static struct platform_device *asuspf_device;
727
728static void asus_hotk_add_fs(void)
729{
730 ASUS_SET_DEVICE_ATTR(infos, 0444, show_infos, NULL);
731
732 if (wl_switch_handle)
733 ASUS_SET_DEVICE_ATTR(wlan, 0644, show_wlan, store_wlan);
734
735 if (bt_switch_handle)
736 ASUS_SET_DEVICE_ATTR(bluetooth, 0644,
737 show_bluetooth, store_bluetooth);
738
739 if (display_set_handle && display_get_handle)
740 ASUS_SET_DEVICE_ATTR(display, 0644, show_disp, store_disp);
741 else if (display_set_handle)
742 ASUS_SET_DEVICE_ATTR(display, 0200, NULL, store_disp);
743
744 if (ledd_set_handle)
745 ASUS_SET_DEVICE_ATTR(ledd, 0644, show_ledd, store_ledd);
746
747 if (ls_switch_handle && ls_level_handle) {
748 ASUS_SET_DEVICE_ATTR(ls_level, 0644, show_lslvl, store_lslvl);
749 ASUS_SET_DEVICE_ATTR(ls_switch, 0644, show_lssw, store_lssw);
750 }
751}
752
753static int asus_handle_init(char *name, acpi_handle * handle,
754 char **paths, int num_paths)
755{
756 int i;
757 acpi_status status;
758
759 for (i = 0; i < num_paths; i++) {
760 status = acpi_get_handle(NULL, paths[i], handle);
761 if (ACPI_SUCCESS(status))
762 return 0;
763 }
764
765 *handle = NULL;
766 return -ENODEV;
767}
768
769#define ASUS_HANDLE_INIT(object) \
770 asus_handle_init(#object, &object##_handle, object##_paths, \
771 ARRAY_SIZE(object##_paths))
772
773/*
774 * This function is used to initialize the hotk with right values. In this
775 * method, we can make all the detection we want, and modify the hotk struct
776 */
777static int asus_hotk_get_info(void)
778{
779 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
780 union acpi_object *model = NULL;
781 int bsts_result, hwrs_result;
782 char *string = NULL;
783 acpi_status status;
784
785 /*
786 * Get DSDT headers early enough to allow for differentiating between
787 * models, but late enough to allow acpi_bus_register_driver() to fail
788 * before doing anything ACPI-specific. Should we encounter a machine,
789 * which needs special handling (i.e. its hotkey device has a different
790 * HID), this bit will be moved. A global variable asus_info contains
791 * the DSDT header.
792 */
793 status = acpi_get_table(ACPI_SIG_DSDT, 1, &asus_info);
794 if (ACPI_FAILURE(status))
795 printk(ASUS_WARNING "Couldn't get the DSDT table header\n");
796
797 /* We have to write 0 on init this far for all ASUS models */
798 if (!write_acpi_int(hotk->handle, "INIT", 0, &buffer)) {
799 printk(ASUS_ERR "Hotkey initialization failed\n");
800 return -ENODEV;
801 }
802
803 /* This needs to be called for some laptops to init properly */
804 if (!read_acpi_int(hotk->handle, "BSTS", &bsts_result, NULL))
805 printk(ASUS_WARNING "Error calling BSTS\n");
806 else if (bsts_result)
807 printk(ASUS_NOTICE "BSTS called, 0x%02x returned\n",
808 bsts_result);
809
810 /*
811 * Try to match the object returned by INIT to the specific model.
812 * Handle every possible object (or the lack of thereof) the DSDT
813 * writers might throw at us. When in trouble, we pass NULL to
814 * asus_model_match() and try something completely different.
815 */
816 if (buffer.pointer) {
817 model = buffer.pointer;
818 switch (model->type) {
819 case ACPI_TYPE_STRING:
820 string = model->string.pointer;
821 break;
822 case ACPI_TYPE_BUFFER:
823 string = model->buffer.pointer;
824 break;
825 default:
826 string = "";
827 break;
828 }
829 }
830 hotk->name = kstrdup(string, GFP_KERNEL);
831 if (!hotk->name)
832 return -ENOMEM;
833
834 if (*string)
835 printk(ASUS_NOTICE " %s model detected\n", string);
836
837 ASUS_HANDLE_INIT(mled_set);
838 ASUS_HANDLE_INIT(tled_set);
839 ASUS_HANDLE_INIT(rled_set);
840 ASUS_HANDLE_INIT(pled_set);
841
842 ASUS_HANDLE_INIT(ledd_set);
843
844 /*
845 * The HWRS method return informations about the hardware.
846 * 0x80 bit is for WLAN, 0x100 for Bluetooth.
847 * The significance of others is yet to be found.
848 * If we don't find the method, we assume the device are present.
849 */
850 if (!read_acpi_int(hotk->handle, "HRWS", &hwrs_result, NULL))
851 hwrs_result = WL_HWRS | BT_HWRS;
852
853 if (hwrs_result & WL_HWRS)
854 ASUS_HANDLE_INIT(wl_switch);
855 if (hwrs_result & BT_HWRS)
856 ASUS_HANDLE_INIT(bt_switch);
857
858 ASUS_HANDLE_INIT(wireless_status);
859
860 ASUS_HANDLE_INIT(brightness_set);
861 ASUS_HANDLE_INIT(brightness_get);
862
863 ASUS_HANDLE_INIT(lcd_switch);
864
865 ASUS_HANDLE_INIT(display_set);
866 ASUS_HANDLE_INIT(display_get);
867
868 /* There is a lot of models with "ALSL", but a few get
869 a real light sens, so we need to check it. */
870 if (ASUS_HANDLE_INIT(ls_switch))
871 ASUS_HANDLE_INIT(ls_level);
872
873 kfree(model);
874
875 return AE_OK;
876}
877
878static int asus_hotk_check(void)
879{
880 int result = 0;
881
882 result = acpi_bus_get_status(hotk->device);
883 if (result)
884 return result;
885
886 if (hotk->device->status.present) {
887 result = asus_hotk_get_info();
888 } else {
889 printk(ASUS_ERR "Hotkey device not present, aborting\n");
890 return -EINVAL;
891 }
892
893 return result;
894}
895
896static int asus_hotk_found;
897
898static int asus_hotk_add(struct acpi_device *device)
899{
900 acpi_status status = AE_OK;
901 int result;
902
903 if (!device)
904 return -EINVAL;
905
906 printk(ASUS_NOTICE "Asus Laptop Support version %s\n",
907 ASUS_LAPTOP_VERSION);
908
909 hotk = kmalloc(sizeof(struct asus_hotk), GFP_KERNEL);
910 if (!hotk)
911 return -ENOMEM;
912 memset(hotk, 0, sizeof(struct asus_hotk));
913
914 hotk->handle = device->handle;
915 strcpy(acpi_device_name(device), ASUS_HOTK_DEVICE_NAME);
916 strcpy(acpi_device_class(device), ASUS_HOTK_CLASS);
917 acpi_driver_data(device) = hotk;
918 hotk->device = device;
919
920 result = asus_hotk_check();
921 if (result)
922 goto end;
923
924 asus_hotk_add_fs();
925
926 /*
927 * We install the handler, it will receive the hotk in parameter, so, we
928 * could add other data to the hotk struct
929 */
930 status = acpi_install_notify_handler(hotk->handle, ACPI_SYSTEM_NOTIFY,
931 asus_hotk_notify, hotk);
932 if (ACPI_FAILURE(status))
933 printk(ASUS_ERR "Error installing notify handler\n");
934
935 asus_hotk_found = 1;
936
937 /* WLED and BLED are on by default */
938 write_status(bt_switch_handle, 1, BT_ON, 0);
939 write_status(wl_switch_handle, 1, WL_ON, 0);
940
941 /* LCD Backlight is on by default */
942 write_status(NULL, 1, LCD_ON, 0);
943
944 /* LED display is off by default */
945 hotk->ledd_status = 0xFFF;
946
947 /* Set initial values of light sensor and level */
948 hotk->light_switch = 1; /* Default to light sensor disabled */
949 hotk->light_level = 0; /* level 5 for sensor sensitivity */
950
951 if (ls_switch_handle)
952 set_light_sens_switch(hotk->light_switch);
953
954 if (ls_level_handle)
955 set_light_sens_level(hotk->light_level);
956
957 end:
958 if (result) {
959 kfree(hotk->name);
960 kfree(hotk);
961 }
962
963 return result;
964}
965
966static int asus_hotk_remove(struct acpi_device *device, int type)
967{
968 acpi_status status = 0;
969
970 if (!device || !acpi_driver_data(device))
971 return -EINVAL;
972
973 status = acpi_remove_notify_handler(hotk->handle, ACPI_SYSTEM_NOTIFY,
974 asus_hotk_notify);
975 if (ACPI_FAILURE(status))
976 printk(ASUS_ERR "Error removing notify handler\n");
977
978 kfree(hotk->name);
979 kfree(hotk);
980
981 return 0;
982}
983
984static void asus_backlight_exit(void)
985{
986 if (asus_backlight_device)
987 backlight_device_unregister(asus_backlight_device);
988}
989
990#define ASUS_LED_UNREGISTER(object) \
991 if(object##_led.class_dev \
992 && !IS_ERR(object##_led.class_dev)) \
993 led_classdev_unregister(&object##_led)
994
995static void asus_led_exit(void)
996{
997 ASUS_LED_UNREGISTER(mled);
998 ASUS_LED_UNREGISTER(tled);
999 ASUS_LED_UNREGISTER(pled);
1000 ASUS_LED_UNREGISTER(rled);
1001
1002 destroy_workqueue(led_workqueue);
1003}
1004
1005static void __exit asus_laptop_exit(void)
1006{
1007 asus_backlight_exit();
1008 asus_led_exit();
1009
1010 acpi_bus_unregister_driver(&asus_hotk_driver);
1011 sysfs_remove_group(&asuspf_device->dev.kobj, &asuspf_attribute_group);
1012 platform_device_unregister(asuspf_device);
1013 platform_driver_unregister(&asuspf_driver);
1014}
1015
1016static int asus_backlight_init(struct device *dev)
1017{
1018 struct backlight_device *bd;
1019
1020 if (brightness_set_handle && lcd_switch_handle) {
1021 bd = backlight_device_register(ASUS_HOTK_FILE, dev,
1022 NULL, &asusbl_data);
1023 if (IS_ERR(bd)) {
1024 printk(ASUS_ERR
1025 "Could not register asus backlight device\n");
1026 asus_backlight_device = NULL;
1027 return PTR_ERR(bd);
1028 }
1029
1030 asus_backlight_device = bd;
1031
1032 down(&bd->sem);
1033 if (likely(bd->props)) {
1034 bd->props->brightness = read_brightness(NULL);
1035 bd->props->power = FB_BLANK_UNBLANK;
1036 if (likely(bd->props->update_status))
1037 bd->props->update_status(bd);
1038 }
1039 up(&bd->sem);
1040 }
1041 return 0;
1042}
1043
1044static int asus_led_register(acpi_handle handle,
1045 struct led_classdev *ldev, struct device *dev)
1046{
1047 if (!handle)
1048 return 0;
1049
1050 return led_classdev_register(dev, ldev);
1051}
1052
1053#define ASUS_LED_REGISTER(object, device) \
1054 asus_led_register(object##_set_handle, &object##_led, device)
1055
1056static int asus_led_init(struct device *dev)
1057{
1058 int rv;
1059
1060 rv = ASUS_LED_REGISTER(mled, dev);
1061 if (rv)
1062 return rv;
1063
1064 rv = ASUS_LED_REGISTER(tled, dev);
1065 if (rv)
1066 return rv;
1067
1068 rv = ASUS_LED_REGISTER(rled, dev);
1069 if (rv)
1070 return rv;
1071
1072 rv = ASUS_LED_REGISTER(pled, dev);
1073 if (rv)
1074 return rv;
1075
1076 led_workqueue = create_singlethread_workqueue("led_workqueue");
1077 if (!led_workqueue)
1078 return -ENOMEM;
1079
1080 return 0;
1081}
1082
1083static int __init asus_laptop_init(void)
1084{
1085 struct device *dev;
1086 int result;
1087
1088 if (acpi_disabled)
1089 return -ENODEV;
1090
1091 if (!acpi_specific_hotkey_enabled) {
1092 printk(ASUS_ERR "Using generic hotkey driver\n");
1093 return -ENODEV;
1094 }
1095
1096 result = acpi_bus_register_driver(&asus_hotk_driver);
1097 if (result < 0)
1098 return result;
1099
1100 /*
1101 * This is a bit of a kludge. We only want this module loaded
1102 * for ASUS systems, but there's currently no way to probe the
1103 * ACPI namespace for ASUS HIDs. So we just return failure if
1104 * we didn't find one, which will cause the module to be
1105 * unloaded.
1106 */
1107 if (!asus_hotk_found) {
1108 acpi_bus_unregister_driver(&asus_hotk_driver);
1109 return -ENODEV;
1110 }
1111
1112 dev = acpi_get_physical_device(hotk->device->handle);
1113
1114 result = asus_backlight_init(dev);
1115 if (result)
1116 goto fail_backlight;
1117
1118 result = asus_led_init(dev);
1119 if (result)
1120 goto fail_led;
1121
1122 /* Register platform stuff */
1123 result = platform_driver_register(&asuspf_driver);
1124 if (result)
1125 goto fail_platform_driver;
1126
1127 asuspf_device = platform_device_alloc(ASUS_HOTK_FILE, -1);
1128 if (!asuspf_device) {
1129 result = -ENOMEM;
1130 goto fail_platform_device1;
1131 }
1132
1133 result = platform_device_add(asuspf_device);
1134 if (result)
1135 goto fail_platform_device2;
1136
1137 result = sysfs_create_group(&asuspf_device->dev.kobj,
1138 &asuspf_attribute_group);
1139 if (result)
1140 goto fail_sysfs;
1141
1142 return 0;
1143
1144 fail_sysfs:
1145 platform_device_del(asuspf_device);
1146
1147 fail_platform_device2:
1148 platform_device_put(asuspf_device);
1149
1150 fail_platform_device1:
1151 platform_driver_unregister(&asuspf_driver);
1152
1153 fail_platform_driver:
1154 asus_led_exit();
1155
1156 fail_led:
1157 asus_backlight_exit();
1158
1159 fail_backlight:
1160
1161 return result;
1162}
1163
1164module_init(asus_laptop_init);
1165module_exit(asus_laptop_exit);
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-21 07:34:38 -0500