asus-laptop.c revision 1f0233eee9b385d78fda78626136c43e045082f7
1/* 2 * asus-laptop.c - Asus Laptop Support 3 * 4 * 5 * Copyright (C) 2002-2005 Julien Lerouge, 2003-2006 Karol Kozimor 6 * Copyright (C) 2006-2007 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 * Sam Lin - GPS support 34 */ 35 36#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 37 38#include <linux/kernel.h> 39#include <linux/module.h> 40#include <linux/init.h> 41#include <linux/types.h> 42#include <linux/err.h> 43#include <linux/proc_fs.h> 44#include <linux/backlight.h> 45#include <linux/fb.h> 46#include <linux/leds.h> 47#include <linux/platform_device.h> 48#include <acpi/acpi_drivers.h> 49#include <acpi/acpi_bus.h> 50#include <asm/uaccess.h> 51#include <linux/input.h> 52 53#define ASUS_LAPTOP_VERSION "0.42" 54 55#define ASUS_HOTK_NAME "Asus Laptop Support" 56#define ASUS_HOTK_CLASS "hotkey" 57#define ASUS_HOTK_DEVICE_NAME "Hotkey" 58#define ASUS_HOTK_FILE KBUILD_MODNAME 59#define ASUS_HOTK_PREFIX "\\_SB.ATKD." 60 61 62/* 63 * Some events we use, same for all Asus 64 */ 65#define ATKD_BR_UP 0x10 66#define ATKD_BR_DOWN 0x20 67#define ATKD_LCD_ON 0x33 68#define ATKD_LCD_OFF 0x34 69 70/* 71 * Known bits returned by \_SB.ATKD.HWRS 72 */ 73#define WL_HWRS 0x80 74#define BT_HWRS 0x100 75 76/* 77 * Flags for hotk status 78 * WL_ON and BT_ON are also used for wireless_status() 79 */ 80#define WL_ON 0x01 /* internal Wifi */ 81#define BT_ON 0x02 /* internal Bluetooth */ 82#define MLED_ON 0x04 /* mail LED */ 83#define TLED_ON 0x08 /* touchpad LED */ 84#define RLED_ON 0x10 /* Record LED */ 85#define PLED_ON 0x20 /* Phone LED */ 86#define GLED_ON 0x40 /* Gaming LED */ 87#define LCD_ON 0x80 /* LCD backlight */ 88#define GPS_ON 0x100 /* GPS */ 89#define KEY_ON 0x200 /* Keyboard backlight */ 90 91#define ASUS_LOG ASUS_HOTK_FILE ": " 92#define ASUS_ERR KERN_ERR ASUS_LOG 93#define ASUS_WARNING KERN_WARNING ASUS_LOG 94#define ASUS_NOTICE KERN_NOTICE ASUS_LOG 95#define ASUS_INFO KERN_INFO ASUS_LOG 96#define ASUS_DEBUG KERN_DEBUG ASUS_LOG 97 98MODULE_AUTHOR("Julien Lerouge, Karol Kozimor, Corentin Chary"); 99MODULE_DESCRIPTION(ASUS_HOTK_NAME); 100MODULE_LICENSE("GPL"); 101 102/* 103 * WAPF defines the behavior of the Fn+Fx wlan key 104 * The significance of values is yet to be found, but 105 * most of the time: 106 * 0x0 will do nothing 107 * 0x1 will allow to control the device with Fn+Fx key. 108 * 0x4 will send an ACPI event (0x88) while pressing the Fn+Fx key 109 * 0x5 like 0x1 or 0x4 110 * So, if something doesn't work as you want, just try other values =) 111 */ 112static uint wapf = 1; 113module_param(wapf, uint, 0644); 114MODULE_PARM_DESC(wapf, "WAPF value"); 115 116#define ASUS_HANDLE(object, paths...) \ 117 static acpi_handle object##_handle = NULL; \ 118 static char *object##_paths[] = { paths } 119 120/* LED */ 121ASUS_HANDLE(mled_set, ASUS_HOTK_PREFIX "MLED"); 122ASUS_HANDLE(tled_set, ASUS_HOTK_PREFIX "TLED"); 123ASUS_HANDLE(rled_set, ASUS_HOTK_PREFIX "RLED"); /* W1JC */ 124ASUS_HANDLE(pled_set, ASUS_HOTK_PREFIX "PLED"); /* A7J */ 125ASUS_HANDLE(gled_set, ASUS_HOTK_PREFIX "GLED"); /* G1, G2 (probably) */ 126 127/* LEDD */ 128ASUS_HANDLE(ledd_set, ASUS_HOTK_PREFIX "SLCM"); 129 130/* 131 * Bluetooth and WLAN 132 * WLED and BLED are not handled like other XLED, because in some dsdt 133 * they also control the WLAN/Bluetooth device. 134 */ 135ASUS_HANDLE(wl_switch, ASUS_HOTK_PREFIX "WLED"); 136ASUS_HANDLE(bt_switch, ASUS_HOTK_PREFIX "BLED"); 137ASUS_HANDLE(wireless_status, ASUS_HOTK_PREFIX "RSTS"); /* All new models */ 138 139/* Brightness */ 140ASUS_HANDLE(brightness_set, ASUS_HOTK_PREFIX "SPLV"); 141ASUS_HANDLE(brightness_get, ASUS_HOTK_PREFIX "GPLV"); 142 143/* Backlight */ 144ASUS_HANDLE(lcd_switch, "\\_SB.PCI0.SBRG.EC0._Q10", /* All new models */ 145 "\\_SB.PCI0.ISA.EC0._Q10", /* A1x */ 146 "\\_SB.PCI0.PX40.ECD0._Q10", /* L3C */ 147 "\\_SB.PCI0.PX40.EC0.Q10", /* M1A */ 148 "\\_SB.PCI0.LPCB.EC0._Q10", /* P30 */ 149 "\\_SB.PCI0.LPCB.EC0._Q0E", /* P30/P35 */ 150 "\\_SB.PCI0.PX40.Q10", /* S1x */ 151 "\\Q10"); /* A2x, L2D, L3D, M2E */ 152 153/* Display */ 154ASUS_HANDLE(display_set, ASUS_HOTK_PREFIX "SDSP"); 155ASUS_HANDLE(display_get, 156 /* A6B, A6K A6R A7D F3JM L4R M6R A3G M6A M6V VX-1 V6J V6V W3Z */ 157 "\\_SB.PCI0.P0P1.VGA.GETD", 158 /* A3E A4K, A4D A4L A6J A7J A8J Z71V M9V S5A M5A z33A W1Jc W2V G1 */ 159 "\\_SB.PCI0.P0P2.VGA.GETD", 160 /* A6V A6Q */ 161 "\\_SB.PCI0.P0P3.VGA.GETD", 162 /* A6T, A6M */ 163 "\\_SB.PCI0.P0PA.VGA.GETD", 164 /* L3C */ 165 "\\_SB.PCI0.PCI1.VGAC.NMAP", 166 /* Z96F */ 167 "\\_SB.PCI0.VGA.GETD", 168 /* A2D */ 169 "\\ACTD", 170 /* A4G Z71A W1N W5A W5F M2N M3N M5N M6N S1N S5N */ 171 "\\ADVG", 172 /* P30 */ 173 "\\DNXT", 174 /* A2H D1 L2D L3D L3H L2E L5D L5C M1A M2E L4L W3V */ 175 "\\INFB", 176 /* A3F A6F A3N A3L M6N W3N W6A */ 177 "\\SSTE"); 178 179ASUS_HANDLE(ls_switch, ASUS_HOTK_PREFIX "ALSC"); /* Z71A Z71V */ 180ASUS_HANDLE(ls_level, ASUS_HOTK_PREFIX "ALSL"); /* Z71A Z71V */ 181 182/* GPS */ 183/* R2H use different handle for GPS on/off */ 184ASUS_HANDLE(gps_on, ASUS_HOTK_PREFIX "SDON"); /* R2H */ 185ASUS_HANDLE(gps_off, ASUS_HOTK_PREFIX "SDOF"); /* R2H */ 186ASUS_HANDLE(gps_status, ASUS_HOTK_PREFIX "GPST"); 187 188/* Keyboard light */ 189ASUS_HANDLE(kled_set, ASUS_HOTK_PREFIX "SLKB"); 190ASUS_HANDLE(kled_get, ASUS_HOTK_PREFIX "GLKB"); 191 192/* 193 * This is the main structure, we can use it to store anything interesting 194 * about the hotk device 195 */ 196struct asus_hotk { 197 char *name; /* laptop name */ 198 struct acpi_device *device; /* the device we are in */ 199 acpi_handle handle; /* the handle of the hotk device */ 200 char status; /* status of the hotk, for LEDs, ... */ 201 u32 ledd_status; /* status of the LED display */ 202 u8 light_level; /* light sensor level */ 203 u8 light_switch; /* light sensor switch value */ 204 u16 event_count[128]; /* count for each event TODO make this better */ 205 struct input_dev *inputdev; 206 u16 *keycode_map; 207}; 208 209/* 210 * This header is made available to allow proper configuration given model, 211 * revision number , ... this info cannot go in struct asus_hotk because it is 212 * available before the hotk 213 */ 214static struct acpi_table_header *asus_info; 215 216/* The actual device the driver binds to */ 217static struct asus_hotk *hotk; 218 219/* 220 * The hotkey driver declaration 221 */ 222static const struct acpi_device_id asus_device_ids[] = { 223 {"ATK0100", 0}, 224 {"ATK0101", 0}, 225 {"", 0}, 226}; 227MODULE_DEVICE_TABLE(acpi, asus_device_ids); 228 229static int asus_hotk_add(struct acpi_device *device); 230static int asus_hotk_remove(struct acpi_device *device, int type); 231static void asus_hotk_notify(struct acpi_device *device, u32 event); 232 233static struct acpi_driver asus_hotk_driver = { 234 .name = ASUS_HOTK_NAME, 235 .class = ASUS_HOTK_CLASS, 236 .owner = THIS_MODULE, 237 .ids = asus_device_ids, 238 .flags = ACPI_DRIVER_ALL_NOTIFY_EVENTS, 239 .ops = { 240 .add = asus_hotk_add, 241 .remove = asus_hotk_remove, 242 .notify = asus_hotk_notify, 243 }, 244}; 245 246/* The backlight device /sys/class/backlight */ 247static struct backlight_device *asus_backlight_device; 248 249/* 250 * The backlight class declaration 251 */ 252static int read_brightness(struct backlight_device *bd); 253static int update_bl_status(struct backlight_device *bd); 254static struct backlight_ops asusbl_ops = { 255 .get_brightness = read_brightness, 256 .update_status = update_bl_status, 257}; 258 259/* 260 * These functions actually update the LED's, and are called from a 261 * workqueue. By doing this as separate work rather than when the LED 262 * subsystem asks, we avoid messing with the Asus ACPI stuff during a 263 * potentially bad time, such as a timer interrupt. 264 */ 265static struct workqueue_struct *led_workqueue; 266 267#define ASUS_LED(object, ledname, max) \ 268 static void object##_led_set(struct led_classdev *led_cdev, \ 269 enum led_brightness value); \ 270 static enum led_brightness object##_led_get( \ 271 struct led_classdev *led_cdev); \ 272 static void object##_led_update(struct work_struct *ignored); \ 273 static int object##_led_wk; \ 274 static DECLARE_WORK(object##_led_work, object##_led_update); \ 275 static struct led_classdev object##_led = { \ 276 .name = "asus::" ledname, \ 277 .brightness_set = object##_led_set, \ 278 .brightness_get = object##_led_get, \ 279 .max_brightness = max \ 280 } 281 282ASUS_LED(mled, "mail", 1); 283ASUS_LED(tled, "touchpad", 1); 284ASUS_LED(rled, "record", 1); 285ASUS_LED(pled, "phone", 1); 286ASUS_LED(gled, "gaming", 1); 287ASUS_LED(kled, "kbd_backlight", 3); 288 289struct key_entry { 290 char type; 291 u8 code; 292 u16 keycode; 293}; 294 295enum { KE_KEY, KE_END }; 296 297static struct key_entry asus_keymap[] = { 298 {KE_KEY, 0x02, KEY_SCREENLOCK}, 299 {KE_KEY, 0x05, KEY_WLAN}, 300 {KE_KEY, 0x08, KEY_F13}, 301 {KE_KEY, 0x17, KEY_ZOOM}, 302 {KE_KEY, 0x1f, KEY_BATTERY}, 303 {KE_KEY, 0x30, KEY_VOLUMEUP}, 304 {KE_KEY, 0x31, KEY_VOLUMEDOWN}, 305 {KE_KEY, 0x32, KEY_MUTE}, 306 {KE_KEY, 0x33, KEY_SWITCHVIDEOMODE}, 307 {KE_KEY, 0x34, KEY_SWITCHVIDEOMODE}, 308 {KE_KEY, 0x40, KEY_PREVIOUSSONG}, 309 {KE_KEY, 0x41, KEY_NEXTSONG}, 310 {KE_KEY, 0x43, KEY_STOPCD}, 311 {KE_KEY, 0x45, KEY_PLAYPAUSE}, 312 {KE_KEY, 0x4c, KEY_MEDIA}, 313 {KE_KEY, 0x50, KEY_EMAIL}, 314 {KE_KEY, 0x51, KEY_WWW}, 315 {KE_KEY, 0x55, KEY_CALC}, 316 {KE_KEY, 0x5C, KEY_SCREENLOCK}, /* Screenlock */ 317 {KE_KEY, 0x5D, KEY_WLAN}, 318 {KE_KEY, 0x5E, KEY_WLAN}, 319 {KE_KEY, 0x5F, KEY_WLAN}, 320 {KE_KEY, 0x60, KEY_SWITCHVIDEOMODE}, 321 {KE_KEY, 0x61, KEY_SWITCHVIDEOMODE}, 322 {KE_KEY, 0x62, KEY_SWITCHVIDEOMODE}, 323 {KE_KEY, 0x63, KEY_SWITCHVIDEOMODE}, 324 {KE_KEY, 0x6B, KEY_F13}, /* Lock Touchpad */ 325 {KE_KEY, 0x82, KEY_CAMERA}, 326 {KE_KEY, 0x88, KEY_WLAN }, 327 {KE_KEY, 0x8A, KEY_PROG1}, 328 {KE_KEY, 0x95, KEY_MEDIA}, 329 {KE_KEY, 0x99, KEY_PHONE}, 330 {KE_KEY, 0xc4, KEY_KBDILLUMUP}, 331 {KE_KEY, 0xc5, KEY_KBDILLUMDOWN}, 332 {KE_END, 0}, 333}; 334 335/* 336 * This function evaluates an ACPI method, given an int as parameter, the 337 * method is searched within the scope of the handle, can be NULL. The output 338 * of the method is written is output, which can also be NULL 339 * 340 * returns 0 if write is successful, -1 else. 341 */ 342static int write_acpi_int(acpi_handle handle, const char *method, int val, 343 struct acpi_buffer *output) 344{ 345 struct acpi_object_list params; /* list of input parameters (an int) */ 346 union acpi_object in_obj; /* the only param we use */ 347 acpi_status status; 348 349 if (!handle) 350 return 0; 351 352 params.count = 1; 353 params.pointer = &in_obj; 354 in_obj.type = ACPI_TYPE_INTEGER; 355 in_obj.integer.value = val; 356 357 status = acpi_evaluate_object(handle, (char *)method, ¶ms, output); 358 if (status == AE_OK) 359 return 0; 360 else 361 return -1; 362} 363 364static int read_wireless_status(int mask) 365{ 366 unsigned long long status; 367 acpi_status rv = AE_OK; 368 369 if (!wireless_status_handle) 370 return (hotk->status & mask) ? 1 : 0; 371 372 rv = acpi_evaluate_integer(wireless_status_handle, NULL, NULL, &status); 373 if (ACPI_FAILURE(rv)) 374 pr_warning("Error reading Wireless status\n"); 375 else 376 return (status & mask) ? 1 : 0; 377 378 return (hotk->status & mask) ? 1 : 0; 379} 380 381static int read_gps_status(void) 382{ 383 unsigned long long status; 384 acpi_status rv = AE_OK; 385 386 rv = acpi_evaluate_integer(gps_status_handle, NULL, NULL, &status); 387 if (ACPI_FAILURE(rv)) 388 pr_warning("Error reading GPS status\n"); 389 else 390 return status ? 1 : 0; 391 392 return (hotk->status & GPS_ON) ? 1 : 0; 393} 394 395/* Generic LED functions */ 396static int read_status(int mask) 397{ 398 /* There is a special method for both wireless devices */ 399 if (mask == BT_ON || mask == WL_ON) 400 return read_wireless_status(mask); 401 else if (mask == GPS_ON) 402 return read_gps_status(); 403 404 return (hotk->status & mask) ? 1 : 0; 405} 406 407static void write_status(acpi_handle handle, int out, int mask) 408{ 409 hotk->status = (out) ? (hotk->status | mask) : (hotk->status & ~mask); 410 411 switch (mask) { 412 case MLED_ON: 413 out = !(out & 0x1); 414 break; 415 case GLED_ON: 416 out = (out & 0x1) + 1; 417 break; 418 case GPS_ON: 419 handle = (out) ? gps_on_handle : gps_off_handle; 420 out = 0x02; 421 break; 422 default: 423 out &= 0x1; 424 break; 425 } 426 427 if (write_acpi_int(handle, NULL, out, NULL)) 428 pr_warning(" write failed %x\n", mask); 429} 430 431/* /sys/class/led handlers */ 432#define ASUS_LED_HANDLER(object, mask) \ 433 static void object##_led_set(struct led_classdev *led_cdev, \ 434 enum led_brightness value) \ 435 { \ 436 object##_led_wk = (value > 0) ? 1 : 0; \ 437 queue_work(led_workqueue, &object##_led_work); \ 438 } \ 439 static void object##_led_update(struct work_struct *ignored) \ 440 { \ 441 int value = object##_led_wk; \ 442 write_status(object##_set_handle, value, (mask)); \ 443 } \ 444 static enum led_brightness object##_led_get( \ 445 struct led_classdev *led_cdev) \ 446 { \ 447 return led_cdev->brightness; \ 448 } 449 450ASUS_LED_HANDLER(mled, MLED_ON); 451ASUS_LED_HANDLER(pled, PLED_ON); 452ASUS_LED_HANDLER(rled, RLED_ON); 453ASUS_LED_HANDLER(tled, TLED_ON); 454ASUS_LED_HANDLER(gled, GLED_ON); 455 456/* 457 * Keyboard backlight 458 */ 459static int get_kled_lvl(void) 460{ 461 unsigned long long kblv; 462 struct acpi_object_list params; 463 union acpi_object in_obj; 464 acpi_status rv; 465 466 params.count = 1; 467 params.pointer = &in_obj; 468 in_obj.type = ACPI_TYPE_INTEGER; 469 in_obj.integer.value = 2; 470 471 rv = acpi_evaluate_integer(kled_get_handle, NULL, ¶ms, &kblv); 472 if (ACPI_FAILURE(rv)) { 473 pr_warning("Error reading kled level\n"); 474 return 0; 475 } 476 return kblv; 477} 478 479static int set_kled_lvl(int kblv) 480{ 481 if (kblv > 0) 482 kblv = (1 << 7) | (kblv & 0x7F); 483 else 484 kblv = 0; 485 486 if (write_acpi_int(kled_set_handle, NULL, kblv, NULL)) { 487 pr_warning("Keyboard LED display write failed\n"); 488 return -EINVAL; 489 } 490 return 0; 491} 492 493static void kled_led_set(struct led_classdev *led_cdev, 494 enum led_brightness value) 495{ 496 kled_led_wk = value; 497 queue_work(led_workqueue, &kled_led_work); 498} 499 500static void kled_led_update(struct work_struct *ignored) 501{ 502 set_kled_lvl(kled_led_wk); 503} 504 505static enum led_brightness kled_led_get(struct led_classdev *led_cdev) 506{ 507 return get_kled_lvl(); 508} 509 510static int get_lcd_state(void) 511{ 512 return read_status(LCD_ON); 513} 514 515static int set_lcd_state(int value) 516{ 517 int lcd = 0; 518 acpi_status status = 0; 519 520 lcd = value ? 1 : 0; 521 522 if (lcd == get_lcd_state()) 523 return 0; 524 525 if (lcd_switch_handle) { 526 status = acpi_evaluate_object(lcd_switch_handle, 527 NULL, NULL, NULL); 528 529 if (ACPI_FAILURE(status)) 530 pr_warning("Error switching LCD\n"); 531 } 532 533 write_status(NULL, lcd, LCD_ON); 534 return 0; 535} 536 537static void lcd_blank(int blank) 538{ 539 struct backlight_device *bd = asus_backlight_device; 540 541 if (bd) { 542 bd->props.power = blank; 543 backlight_update_status(bd); 544 } 545} 546 547static int read_brightness(struct backlight_device *bd) 548{ 549 unsigned long long value; 550 acpi_status rv = AE_OK; 551 552 rv = acpi_evaluate_integer(brightness_get_handle, NULL, NULL, &value); 553 if (ACPI_FAILURE(rv)) 554 pr_warning("Error reading brightness\n"); 555 556 return value; 557} 558 559static int set_brightness(struct backlight_device *bd, int value) 560{ 561 int ret = 0; 562 563 value = (0 < value) ? ((15 < value) ? 15 : value) : 0; 564 /* 0 <= value <= 15 */ 565 566 if (write_acpi_int(brightness_set_handle, NULL, value, NULL)) { 567 pr_warning("Error changing brightness\n"); 568 ret = -EIO; 569 } 570 571 return ret; 572} 573 574static int update_bl_status(struct backlight_device *bd) 575{ 576 int rv; 577 int value = bd->props.brightness; 578 579 rv = set_brightness(bd, value); 580 if (rv) 581 return rv; 582 583 value = (bd->props.power == FB_BLANK_UNBLANK) ? 1 : 0; 584 return set_lcd_state(value); 585} 586 587/* 588 * Platform device handlers 589 */ 590 591/* 592 * We write our info in page, we begin at offset off and cannot write more 593 * than count bytes. We set eof to 1 if we handle those 2 values. We return the 594 * number of bytes written in page 595 */ 596static ssize_t show_infos(struct device *dev, 597 struct device_attribute *attr, char *page) 598{ 599 int len = 0; 600 unsigned long long temp; 601 char buf[16]; /* enough for all info */ 602 acpi_status rv = AE_OK; 603 604 /* 605 * We use the easy way, we don't care of off and count, so we don't set eof 606 * to 1 607 */ 608 609 len += sprintf(page, ASUS_HOTK_NAME " " ASUS_LAPTOP_VERSION "\n"); 610 len += sprintf(page + len, "Model reference : %s\n", hotk->name); 611 /* 612 * The SFUN method probably allows the original driver to get the list 613 * of features supported by a given model. For now, 0x0100 or 0x0800 614 * bit signifies that the laptop is equipped with a Wi-Fi MiniPCI card. 615 * The significance of others is yet to be found. 616 */ 617 rv = acpi_evaluate_integer(hotk->handle, "SFUN", NULL, &temp); 618 if (!ACPI_FAILURE(rv)) 619 len += sprintf(page + len, "SFUN value : %#x\n", 620 (uint) temp); 621 /* 622 * The HWRS method return informations about the hardware. 623 * 0x80 bit is for WLAN, 0x100 for Bluetooth. 624 * The significance of others is yet to be found. 625 * If we don't find the method, we assume the device are present. 626 */ 627 rv = acpi_evaluate_integer(hotk->handle, "HRWS", NULL, &temp); 628 if (!ACPI_FAILURE(rv)) 629 len += sprintf(page + len, "HRWS value : %#x\n", 630 (uint) temp); 631 /* 632 * Another value for userspace: the ASYM method returns 0x02 for 633 * battery low and 0x04 for battery critical, its readings tend to be 634 * more accurate than those provided by _BST. 635 * Note: since not all the laptops provide this method, errors are 636 * silently ignored. 637 */ 638 rv = acpi_evaluate_integer(hotk->handle, "ASYM", NULL, &temp); 639 if (!ACPI_FAILURE(rv)) 640 len += sprintf(page + len, "ASYM value : %#x\n", 641 (uint) temp); 642 if (asus_info) { 643 snprintf(buf, 16, "%d", asus_info->length); 644 len += sprintf(page + len, "DSDT length : %s\n", buf); 645 snprintf(buf, 16, "%d", asus_info->checksum); 646 len += sprintf(page + len, "DSDT checksum : %s\n", buf); 647 snprintf(buf, 16, "%d", asus_info->revision); 648 len += sprintf(page + len, "DSDT revision : %s\n", buf); 649 snprintf(buf, 7, "%s", asus_info->oem_id); 650 len += sprintf(page + len, "OEM id : %s\n", buf); 651 snprintf(buf, 9, "%s", asus_info->oem_table_id); 652 len += sprintf(page + len, "OEM table id : %s\n", buf); 653 snprintf(buf, 16, "%x", asus_info->oem_revision); 654 len += sprintf(page + len, "OEM revision : 0x%s\n", buf); 655 snprintf(buf, 5, "%s", asus_info->asl_compiler_id); 656 len += sprintf(page + len, "ASL comp vendor id : %s\n", buf); 657 snprintf(buf, 16, "%x", asus_info->asl_compiler_revision); 658 len += sprintf(page + len, "ASL comp revision : 0x%s\n", buf); 659 } 660 661 return len; 662} 663 664static int parse_arg(const char *buf, unsigned long count, int *val) 665{ 666 if (!count) 667 return 0; 668 if (count > 31) 669 return -EINVAL; 670 if (sscanf(buf, "%i", val) != 1) 671 return -EINVAL; 672 return count; 673} 674 675static ssize_t store_status(const char *buf, size_t count, 676 acpi_handle handle, int mask) 677{ 678 int rv, value; 679 int out = 0; 680 681 rv = parse_arg(buf, count, &value); 682 if (rv > 0) 683 out = value ? 1 : 0; 684 685 write_status(handle, out, mask); 686 687 return rv; 688} 689 690/* 691 * LEDD display 692 */ 693static ssize_t show_ledd(struct device *dev, 694 struct device_attribute *attr, char *buf) 695{ 696 return sprintf(buf, "0x%08x\n", hotk->ledd_status); 697} 698 699static ssize_t store_ledd(struct device *dev, struct device_attribute *attr, 700 const char *buf, size_t count) 701{ 702 int rv, value; 703 704 rv = parse_arg(buf, count, &value); 705 if (rv > 0) { 706 if (write_acpi_int(ledd_set_handle, NULL, value, NULL)) 707 pr_warning("LED display write failed\n"); 708 else 709 hotk->ledd_status = (u32) value; 710 } 711 return rv; 712} 713 714/* 715 * WLAN 716 */ 717static ssize_t show_wlan(struct device *dev, 718 struct device_attribute *attr, char *buf) 719{ 720 return sprintf(buf, "%d\n", read_status(WL_ON)); 721} 722 723static ssize_t store_wlan(struct device *dev, struct device_attribute *attr, 724 const char *buf, size_t count) 725{ 726 return store_status(buf, count, wl_switch_handle, WL_ON); 727} 728 729/* 730 * Bluetooth 731 */ 732static ssize_t show_bluetooth(struct device *dev, 733 struct device_attribute *attr, char *buf) 734{ 735 return sprintf(buf, "%d\n", read_status(BT_ON)); 736} 737 738static ssize_t store_bluetooth(struct device *dev, 739 struct device_attribute *attr, const char *buf, 740 size_t count) 741{ 742 return store_status(buf, count, bt_switch_handle, BT_ON); 743} 744 745/* 746 * Display 747 */ 748static void set_display(int value) 749{ 750 /* no sanity check needed for now */ 751 if (write_acpi_int(display_set_handle, NULL, value, NULL)) 752 pr_warning("Error setting display\n"); 753 return; 754} 755 756static int read_display(void) 757{ 758 unsigned long long value = 0; 759 acpi_status rv = AE_OK; 760 761 /* 762 * In most of the case, we know how to set the display, but sometime 763 * we can't read it 764 */ 765 if (display_get_handle) { 766 rv = acpi_evaluate_integer(display_get_handle, NULL, 767 NULL, &value); 768 if (ACPI_FAILURE(rv)) 769 pr_warning("Error reading display status\n"); 770 } 771 772 value &= 0x0F; /* needed for some models, shouldn't hurt others */ 773 774 return value; 775} 776 777/* 778 * Now, *this* one could be more user-friendly, but so far, no-one has 779 * complained. The significance of bits is the same as in store_disp() 780 */ 781static ssize_t show_disp(struct device *dev, 782 struct device_attribute *attr, char *buf) 783{ 784 return sprintf(buf, "%d\n", read_display()); 785} 786 787/* 788 * Experimental support for display switching. As of now: 1 should activate 789 * the LCD output, 2 should do for CRT, 4 for TV-Out and 8 for DVI. 790 * Any combination (bitwise) of these will suffice. I never actually tested 4 791 * displays hooked up simultaneously, so be warned. See the acpi4asus README 792 * for more info. 793 */ 794static ssize_t store_disp(struct device *dev, struct device_attribute *attr, 795 const char *buf, size_t count) 796{ 797 int rv, value; 798 799 rv = parse_arg(buf, count, &value); 800 if (rv > 0) 801 set_display(value); 802 return rv; 803} 804 805/* 806 * Light Sens 807 */ 808static void set_light_sens_switch(int value) 809{ 810 if (write_acpi_int(ls_switch_handle, NULL, value, NULL)) 811 pr_warning("Error setting light sensor switch\n"); 812 hotk->light_switch = value; 813} 814 815static ssize_t show_lssw(struct device *dev, 816 struct device_attribute *attr, char *buf) 817{ 818 return sprintf(buf, "%d\n", hotk->light_switch); 819} 820 821static ssize_t store_lssw(struct device *dev, struct device_attribute *attr, 822 const char *buf, size_t count) 823{ 824 int rv, value; 825 826 rv = parse_arg(buf, count, &value); 827 if (rv > 0) 828 set_light_sens_switch(value ? 1 : 0); 829 830 return rv; 831} 832 833static void set_light_sens_level(int value) 834{ 835 if (write_acpi_int(ls_level_handle, NULL, value, NULL)) 836 pr_warning("Error setting light sensor level\n"); 837 hotk->light_level = value; 838} 839 840static ssize_t show_lslvl(struct device *dev, 841 struct device_attribute *attr, char *buf) 842{ 843 return sprintf(buf, "%d\n", hotk->light_level); 844} 845 846static ssize_t store_lslvl(struct device *dev, struct device_attribute *attr, 847 const char *buf, size_t count) 848{ 849 int rv, value; 850 851 rv = parse_arg(buf, count, &value); 852 if (rv > 0) { 853 value = (0 < value) ? ((15 < value) ? 15 : value) : 0; 854 /* 0 <= value <= 15 */ 855 set_light_sens_level(value); 856 } 857 858 return rv; 859} 860 861/* 862 * GPS 863 */ 864static ssize_t show_gps(struct device *dev, 865 struct device_attribute *attr, char *buf) 866{ 867 return sprintf(buf, "%d\n", read_status(GPS_ON)); 868} 869 870static ssize_t store_gps(struct device *dev, struct device_attribute *attr, 871 const char *buf, size_t count) 872{ 873 return store_status(buf, count, NULL, GPS_ON); 874} 875 876/* 877 * Hotkey functions 878 */ 879static struct key_entry *asus_get_entry_by_scancode(int code) 880{ 881 struct key_entry *key; 882 883 for (key = asus_keymap; key->type != KE_END; key++) 884 if (code == key->code) 885 return key; 886 887 return NULL; 888} 889 890static struct key_entry *asus_get_entry_by_keycode(int code) 891{ 892 struct key_entry *key; 893 894 for (key = asus_keymap; key->type != KE_END; key++) 895 if (code == key->keycode && key->type == KE_KEY) 896 return key; 897 898 return NULL; 899} 900 901static int asus_getkeycode(struct input_dev *dev, int scancode, int *keycode) 902{ 903 struct key_entry *key = asus_get_entry_by_scancode(scancode); 904 905 if (key && key->type == KE_KEY) { 906 *keycode = key->keycode; 907 return 0; 908 } 909 910 return -EINVAL; 911} 912 913static int asus_setkeycode(struct input_dev *dev, int scancode, int keycode) 914{ 915 struct key_entry *key; 916 int old_keycode; 917 918 if (keycode < 0 || keycode > KEY_MAX) 919 return -EINVAL; 920 921 key = asus_get_entry_by_scancode(scancode); 922 if (key && key->type == KE_KEY) { 923 old_keycode = key->keycode; 924 key->keycode = keycode; 925 set_bit(keycode, dev->keybit); 926 if (!asus_get_entry_by_keycode(old_keycode)) 927 clear_bit(old_keycode, dev->keybit); 928 return 0; 929 } 930 931 return -EINVAL; 932} 933 934static void asus_hotk_notify(struct acpi_device *device, u32 event) 935{ 936 static struct key_entry *key; 937 u16 count; 938 939 /* TODO Find a better way to handle events count. */ 940 if (!hotk) 941 return; 942 943 /* 944 * We need to tell the backlight device when the backlight power is 945 * switched 946 */ 947 if (event == ATKD_LCD_ON) { 948 write_status(NULL, 1, LCD_ON); 949 lcd_blank(FB_BLANK_UNBLANK); 950 } else if (event == ATKD_LCD_OFF) { 951 write_status(NULL, 0, LCD_ON); 952 lcd_blank(FB_BLANK_POWERDOWN); 953 } 954 955 count = hotk->event_count[event % 128]++; 956 acpi_bus_generate_proc_event(hotk->device, event, count); 957 acpi_bus_generate_netlink_event(hotk->device->pnp.device_class, 958 dev_name(&hotk->device->dev), event, 959 count); 960 961 if (hotk->inputdev) { 962 key = asus_get_entry_by_scancode(event); 963 if (!key) 964 return ; 965 966 switch (key->type) { 967 case KE_KEY: 968 input_report_key(hotk->inputdev, key->keycode, 1); 969 input_sync(hotk->inputdev); 970 input_report_key(hotk->inputdev, key->keycode, 0); 971 input_sync(hotk->inputdev); 972 break; 973 } 974 } 975} 976 977#define ASUS_CREATE_DEVICE_ATTR(_name) \ 978 struct device_attribute dev_attr_##_name = { \ 979 .attr = { \ 980 .name = __stringify(_name), \ 981 .mode = 0 }, \ 982 .show = NULL, \ 983 .store = NULL, \ 984 } 985 986#define ASUS_SET_DEVICE_ATTR(_name, _mode, _show, _store) \ 987 do { \ 988 dev_attr_##_name.attr.mode = _mode; \ 989 dev_attr_##_name.show = _show; \ 990 dev_attr_##_name.store = _store; \ 991 } while(0) 992 993static ASUS_CREATE_DEVICE_ATTR(infos); 994static ASUS_CREATE_DEVICE_ATTR(wlan); 995static ASUS_CREATE_DEVICE_ATTR(bluetooth); 996static ASUS_CREATE_DEVICE_ATTR(display); 997static ASUS_CREATE_DEVICE_ATTR(ledd); 998static ASUS_CREATE_DEVICE_ATTR(ls_switch); 999static ASUS_CREATE_DEVICE_ATTR(ls_level); 1000static ASUS_CREATE_DEVICE_ATTR(gps); 1001 1002static struct attribute *asuspf_attributes[] = { 1003 &dev_attr_infos.attr, 1004 &dev_attr_wlan.attr, 1005 &dev_attr_bluetooth.attr, 1006 &dev_attr_display.attr, 1007 &dev_attr_ledd.attr, 1008 &dev_attr_ls_switch.attr, 1009 &dev_attr_ls_level.attr, 1010 &dev_attr_gps.attr, 1011 NULL 1012}; 1013 1014static struct attribute_group asuspf_attribute_group = { 1015 .attrs = asuspf_attributes 1016}; 1017 1018static struct platform_driver asuspf_driver = { 1019 .driver = { 1020 .name = ASUS_HOTK_FILE, 1021 .owner = THIS_MODULE, 1022 } 1023}; 1024 1025static struct platform_device *asuspf_device; 1026 1027static void asus_hotk_add_fs(void) 1028{ 1029 ASUS_SET_DEVICE_ATTR(infos, 0444, show_infos, NULL); 1030 1031 if (wl_switch_handle) 1032 ASUS_SET_DEVICE_ATTR(wlan, 0644, show_wlan, store_wlan); 1033 1034 if (bt_switch_handle) 1035 ASUS_SET_DEVICE_ATTR(bluetooth, 0644, 1036 show_bluetooth, store_bluetooth); 1037 1038 if (display_set_handle && display_get_handle) 1039 ASUS_SET_DEVICE_ATTR(display, 0644, show_disp, store_disp); 1040 else if (display_set_handle) 1041 ASUS_SET_DEVICE_ATTR(display, 0200, NULL, store_disp); 1042 1043 if (ledd_set_handle) 1044 ASUS_SET_DEVICE_ATTR(ledd, 0644, show_ledd, store_ledd); 1045 1046 if (ls_switch_handle && ls_level_handle) { 1047 ASUS_SET_DEVICE_ATTR(ls_level, 0644, show_lslvl, store_lslvl); 1048 ASUS_SET_DEVICE_ATTR(ls_switch, 0644, show_lssw, store_lssw); 1049 } 1050 1051 if (gps_status_handle && gps_on_handle && gps_off_handle) 1052 ASUS_SET_DEVICE_ATTR(gps, 0644, show_gps, store_gps); 1053} 1054 1055static int asus_handle_init(char *name, acpi_handle * handle, 1056 char **paths, int num_paths) 1057{ 1058 int i; 1059 acpi_status status; 1060 1061 for (i = 0; i < num_paths; i++) { 1062 status = acpi_get_handle(NULL, paths[i], handle); 1063 if (ACPI_SUCCESS(status)) 1064 return 0; 1065 } 1066 1067 *handle = NULL; 1068 return -ENODEV; 1069} 1070 1071#define ASUS_HANDLE_INIT(object) \ 1072 asus_handle_init(#object, &object##_handle, object##_paths, \ 1073 ARRAY_SIZE(object##_paths)) 1074 1075/* 1076 * This function is used to initialize the hotk with right values. In this 1077 * method, we can make all the detection we want, and modify the hotk struct 1078 */ 1079static int asus_hotk_get_info(void) 1080{ 1081 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; 1082 union acpi_object *model = NULL; 1083 unsigned long long bsts_result, hwrs_result; 1084 char *string = NULL; 1085 acpi_status status; 1086 1087 /* 1088 * Get DSDT headers early enough to allow for differentiating between 1089 * models, but late enough to allow acpi_bus_register_driver() to fail 1090 * before doing anything ACPI-specific. Should we encounter a machine, 1091 * which needs special handling (i.e. its hotkey device has a different 1092 * HID), this bit will be moved. A global variable asus_info contains 1093 * the DSDT header. 1094 */ 1095 status = acpi_get_table(ACPI_SIG_DSDT, 1, &asus_info); 1096 if (ACPI_FAILURE(status)) 1097 pr_warning("Couldn't get the DSDT table header\n"); 1098 1099 /* We have to write 0 on init this far for all ASUS models */ 1100 if (write_acpi_int(hotk->handle, "INIT", 0, &buffer)) { 1101 pr_err("Hotkey initialization failed\n"); 1102 return -ENODEV; 1103 } 1104 1105 /* This needs to be called for some laptops to init properly */ 1106 status = 1107 acpi_evaluate_integer(hotk->handle, "BSTS", NULL, &bsts_result); 1108 if (ACPI_FAILURE(status)) 1109 pr_warning("Error calling BSTS\n"); 1110 else if (bsts_result) 1111 pr_notice("BSTS called, 0x%02x returned\n", 1112 (uint) bsts_result); 1113 1114 /* This too ... */ 1115 write_acpi_int(hotk->handle, "CWAP", wapf, NULL); 1116 1117 /* 1118 * Try to match the object returned by INIT to the specific model. 1119 * Handle every possible object (or the lack of thereof) the DSDT 1120 * writers might throw at us. When in trouble, we pass NULL to 1121 * asus_model_match() and try something completely different. 1122 */ 1123 if (buffer.pointer) { 1124 model = buffer.pointer; 1125 switch (model->type) { 1126 case ACPI_TYPE_STRING: 1127 string = model->string.pointer; 1128 break; 1129 case ACPI_TYPE_BUFFER: 1130 string = model->buffer.pointer; 1131 break; 1132 default: 1133 string = ""; 1134 break; 1135 } 1136 } 1137 hotk->name = kstrdup(string, GFP_KERNEL); 1138 if (!hotk->name) 1139 return -ENOMEM; 1140 1141 if (*string) 1142 pr_notice(" %s model detected\n", string); 1143 1144 ASUS_HANDLE_INIT(mled_set); 1145 ASUS_HANDLE_INIT(tled_set); 1146 ASUS_HANDLE_INIT(rled_set); 1147 ASUS_HANDLE_INIT(pled_set); 1148 ASUS_HANDLE_INIT(gled_set); 1149 1150 ASUS_HANDLE_INIT(ledd_set); 1151 1152 ASUS_HANDLE_INIT(kled_set); 1153 ASUS_HANDLE_INIT(kled_get); 1154 1155 /* 1156 * The HWRS method return informations about the hardware. 1157 * 0x80 bit is for WLAN, 0x100 for Bluetooth. 1158 * The significance of others is yet to be found. 1159 * If we don't find the method, we assume the device are present. 1160 */ 1161 status = 1162 acpi_evaluate_integer(hotk->handle, "HRWS", NULL, &hwrs_result); 1163 if (ACPI_FAILURE(status)) 1164 hwrs_result = WL_HWRS | BT_HWRS; 1165 1166 if (hwrs_result & WL_HWRS) 1167 ASUS_HANDLE_INIT(wl_switch); 1168 if (hwrs_result & BT_HWRS) 1169 ASUS_HANDLE_INIT(bt_switch); 1170 1171 ASUS_HANDLE_INIT(wireless_status); 1172 1173 ASUS_HANDLE_INIT(brightness_set); 1174 ASUS_HANDLE_INIT(brightness_get); 1175 1176 ASUS_HANDLE_INIT(lcd_switch); 1177 1178 ASUS_HANDLE_INIT(display_set); 1179 ASUS_HANDLE_INIT(display_get); 1180 1181 /* 1182 * There is a lot of models with "ALSL", but a few get 1183 * a real light sens, so we need to check it. 1184 */ 1185 if (!ASUS_HANDLE_INIT(ls_switch)) 1186 ASUS_HANDLE_INIT(ls_level); 1187 1188 ASUS_HANDLE_INIT(gps_on); 1189 ASUS_HANDLE_INIT(gps_off); 1190 ASUS_HANDLE_INIT(gps_status); 1191 1192 kfree(model); 1193 1194 return AE_OK; 1195} 1196 1197static int asus_input_init(void) 1198{ 1199 const struct key_entry *key; 1200 int result; 1201 1202 hotk->inputdev = input_allocate_device(); 1203 if (!hotk->inputdev) { 1204 pr_info("Unable to allocate input device\n"); 1205 return 0; 1206 } 1207 hotk->inputdev->name = "Asus Laptop extra buttons"; 1208 hotk->inputdev->phys = ASUS_HOTK_FILE "/input0"; 1209 hotk->inputdev->id.bustype = BUS_HOST; 1210 hotk->inputdev->getkeycode = asus_getkeycode; 1211 hotk->inputdev->setkeycode = asus_setkeycode; 1212 1213 for (key = asus_keymap; key->type != KE_END; key++) { 1214 switch (key->type) { 1215 case KE_KEY: 1216 set_bit(EV_KEY, hotk->inputdev->evbit); 1217 set_bit(key->keycode, hotk->inputdev->keybit); 1218 break; 1219 } 1220 } 1221 result = input_register_device(hotk->inputdev); 1222 if (result) { 1223 pr_info("Unable to register input device\n"); 1224 input_free_device(hotk->inputdev); 1225 } 1226 return result; 1227} 1228 1229static int asus_hotk_check(void) 1230{ 1231 int result = 0; 1232 1233 result = acpi_bus_get_status(hotk->device); 1234 if (result) 1235 return result; 1236 1237 if (hotk->device->status.present) { 1238 result = asus_hotk_get_info(); 1239 } else { 1240 pr_err("Hotkey device not present, aborting\n"); 1241 return -EINVAL; 1242 } 1243 1244 return result; 1245} 1246 1247static int asus_hotk_found; 1248 1249static int asus_hotk_add(struct acpi_device *device) 1250{ 1251 int result; 1252 1253 pr_notice("Asus Laptop Support version %s\n", 1254 ASUS_LAPTOP_VERSION); 1255 1256 hotk = kzalloc(sizeof(struct asus_hotk), GFP_KERNEL); 1257 if (!hotk) 1258 return -ENOMEM; 1259 1260 hotk->handle = device->handle; 1261 strcpy(acpi_device_name(device), ASUS_HOTK_DEVICE_NAME); 1262 strcpy(acpi_device_class(device), ASUS_HOTK_CLASS); 1263 device->driver_data = hotk; 1264 hotk->device = device; 1265 1266 result = asus_hotk_check(); 1267 if (result) 1268 goto end; 1269 1270 asus_hotk_add_fs(); 1271 1272 asus_hotk_found = 1; 1273 1274 /* WLED and BLED are on by default */ 1275 write_status(bt_switch_handle, 1, BT_ON); 1276 write_status(wl_switch_handle, 1, WL_ON); 1277 1278 /* If the h/w switch is off, we need to check the real status */ 1279 write_status(NULL, read_status(BT_ON), BT_ON); 1280 write_status(NULL, read_status(WL_ON), WL_ON); 1281 1282 /* LCD Backlight is on by default */ 1283 write_status(NULL, 1, LCD_ON); 1284 1285 /* Keyboard Backlight is on by default */ 1286 if (kled_set_handle) 1287 set_kled_lvl(1); 1288 1289 /* LED display is off by default */ 1290 hotk->ledd_status = 0xFFF; 1291 1292 /* Set initial values of light sensor and level */ 1293 hotk->light_switch = 1; /* Default to light sensor disabled */ 1294 hotk->light_level = 0; /* level 5 for sensor sensitivity */ 1295 1296 if (ls_switch_handle) 1297 set_light_sens_switch(hotk->light_switch); 1298 1299 if (ls_level_handle) 1300 set_light_sens_level(hotk->light_level); 1301 1302 /* GPS is on by default */ 1303 write_status(NULL, 1, GPS_ON); 1304 1305end: 1306 if (result) { 1307 kfree(hotk->name); 1308 kfree(hotk); 1309 } 1310 1311 return result; 1312} 1313 1314static int asus_hotk_remove(struct acpi_device *device, int type) 1315{ 1316 kfree(hotk->name); 1317 kfree(hotk); 1318 1319 return 0; 1320} 1321 1322static void asus_backlight_exit(void) 1323{ 1324 if (asus_backlight_device) 1325 backlight_device_unregister(asus_backlight_device); 1326} 1327 1328#define ASUS_LED_UNREGISTER(object) \ 1329 if (object##_led.dev) \ 1330 led_classdev_unregister(&object##_led) 1331 1332static void asus_led_exit(void) 1333{ 1334 destroy_workqueue(led_workqueue); 1335 ASUS_LED_UNREGISTER(mled); 1336 ASUS_LED_UNREGISTER(tled); 1337 ASUS_LED_UNREGISTER(pled); 1338 ASUS_LED_UNREGISTER(rled); 1339 ASUS_LED_UNREGISTER(gled); 1340 ASUS_LED_UNREGISTER(kled); 1341} 1342 1343static void asus_input_exit(void) 1344{ 1345 if (hotk->inputdev) 1346 input_unregister_device(hotk->inputdev); 1347} 1348 1349static void __exit asus_laptop_exit(void) 1350{ 1351 asus_backlight_exit(); 1352 asus_led_exit(); 1353 asus_input_exit(); 1354 1355 acpi_bus_unregister_driver(&asus_hotk_driver); 1356 sysfs_remove_group(&asuspf_device->dev.kobj, &asuspf_attribute_group); 1357 platform_device_unregister(asuspf_device); 1358 platform_driver_unregister(&asuspf_driver); 1359} 1360 1361static int asus_backlight_init(struct device *dev) 1362{ 1363 struct backlight_device *bd; 1364 1365 if (brightness_set_handle && lcd_switch_handle) { 1366 bd = backlight_device_register(ASUS_HOTK_FILE, dev, 1367 NULL, &asusbl_ops); 1368 if (IS_ERR(bd)) { 1369 pr_err("Could not register asus backlight device\n"); 1370 asus_backlight_device = NULL; 1371 return PTR_ERR(bd); 1372 } 1373 1374 asus_backlight_device = bd; 1375 1376 bd->props.max_brightness = 15; 1377 bd->props.brightness = read_brightness(NULL); 1378 bd->props.power = FB_BLANK_UNBLANK; 1379 backlight_update_status(bd); 1380 } 1381 return 0; 1382} 1383 1384static int asus_led_register(acpi_handle handle, 1385 struct led_classdev *ldev, struct device *dev) 1386{ 1387 if (!handle) 1388 return 0; 1389 1390 return led_classdev_register(dev, ldev); 1391} 1392 1393#define ASUS_LED_REGISTER(object, device) \ 1394 asus_led_register(object##_set_handle, &object##_led, device) 1395 1396static int asus_led_init(struct device *dev) 1397{ 1398 int rv; 1399 1400 rv = ASUS_LED_REGISTER(mled, dev); 1401 if (rv) 1402 goto out; 1403 1404 rv = ASUS_LED_REGISTER(tled, dev); 1405 if (rv) 1406 goto out1; 1407 1408 rv = ASUS_LED_REGISTER(rled, dev); 1409 if (rv) 1410 goto out2; 1411 1412 rv = ASUS_LED_REGISTER(pled, dev); 1413 if (rv) 1414 goto out3; 1415 1416 rv = ASUS_LED_REGISTER(gled, dev); 1417 if (rv) 1418 goto out4; 1419 1420 if (kled_set_handle && kled_get_handle) 1421 rv = ASUS_LED_REGISTER(kled, dev); 1422 if (rv) 1423 goto out5; 1424 1425 led_workqueue = create_singlethread_workqueue("led_workqueue"); 1426 if (!led_workqueue) 1427 goto out6; 1428 1429 return 0; 1430out6: 1431 rv = -ENOMEM; 1432 ASUS_LED_UNREGISTER(kled); 1433out5: 1434 ASUS_LED_UNREGISTER(gled); 1435out4: 1436 ASUS_LED_UNREGISTER(pled); 1437out3: 1438 ASUS_LED_UNREGISTER(rled); 1439out2: 1440 ASUS_LED_UNREGISTER(tled); 1441out1: 1442 ASUS_LED_UNREGISTER(mled); 1443out: 1444 return rv; 1445} 1446 1447static int __init asus_laptop_init(void) 1448{ 1449 int result; 1450 1451 result = acpi_bus_register_driver(&asus_hotk_driver); 1452 if (result < 0) 1453 return result; 1454 1455 /* 1456 * This is a bit of a kludge. We only want this module loaded 1457 * for ASUS systems, but there's currently no way to probe the 1458 * ACPI namespace for ASUS HIDs. So we just return failure if 1459 * we didn't find one, which will cause the module to be 1460 * unloaded. 1461 */ 1462 if (!asus_hotk_found) { 1463 acpi_bus_unregister_driver(&asus_hotk_driver); 1464 return -ENODEV; 1465 } 1466 1467 result = asus_input_init(); 1468 if (result) 1469 goto fail_input; 1470 1471 /* Register platform stuff */ 1472 result = platform_driver_register(&asuspf_driver); 1473 if (result) 1474 goto fail_platform_driver; 1475 1476 asuspf_device = platform_device_alloc(ASUS_HOTK_FILE, -1); 1477 if (!asuspf_device) { 1478 result = -ENOMEM; 1479 goto fail_platform_device1; 1480 } 1481 1482 result = platform_device_add(asuspf_device); 1483 if (result) 1484 goto fail_platform_device2; 1485 1486 result = sysfs_create_group(&asuspf_device->dev.kobj, 1487 &asuspf_attribute_group); 1488 if (result) 1489 goto fail_sysfs; 1490 1491 result = asus_led_init(&asuspf_device->dev); 1492 if (result) 1493 goto fail_led; 1494 1495 if (!acpi_video_backlight_support()) { 1496 result = asus_backlight_init(&asuspf_device->dev); 1497 if (result) 1498 goto fail_backlight; 1499 } else 1500 pr_info("Brightness ignored, must be controlled by " 1501 "ACPI video driver\n"); 1502 1503 return 0; 1504 1505fail_backlight: 1506 asus_led_exit(); 1507 1508fail_led: 1509 sysfs_remove_group(&asuspf_device->dev.kobj, 1510 &asuspf_attribute_group); 1511 1512fail_sysfs: 1513 platform_device_del(asuspf_device); 1514 1515fail_platform_device2: 1516 platform_device_put(asuspf_device); 1517 1518fail_platform_device1: 1519 platform_driver_unregister(&asuspf_driver); 1520 1521fail_platform_driver: 1522 asus_input_exit(); 1523 1524fail_input: 1525 1526 return result; 1527} 1528 1529module_init(asus_laptop_init); 1530module_exit(asus_laptop_exit); 1531