asus-laptop.c revision 1d4a3800c764d111d67462a14589ed1611b2f55e
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 90#define ASUS_LOG ASUS_HOTK_FILE ": " 91#define ASUS_ERR KERN_ERR ASUS_LOG 92#define ASUS_WARNING KERN_WARNING ASUS_LOG 93#define ASUS_NOTICE KERN_NOTICE ASUS_LOG 94#define ASUS_INFO KERN_INFO ASUS_LOG 95#define ASUS_DEBUG KERN_DEBUG ASUS_LOG 96 97MODULE_AUTHOR("Julien Lerouge, Karol Kozimor, Corentin Chary"); 98MODULE_DESCRIPTION(ASUS_HOTK_NAME); 99MODULE_LICENSE("GPL"); 100 101/* WAPF defines the behavior of the Fn+Fx wlan key 102 * The significance of values is yet to be found, but 103 * most of the time: 104 * 0x0 will do nothing 105 * 0x1 will allow to control the device with Fn+Fx key. 106 * 0x4 will send an ACPI event (0x88) while pressing the Fn+Fx key 107 * 0x5 like 0x1 or 0x4 108 * So, if something doesn't work as you want, just try other values =) 109 */ 110static uint wapf = 1; 111module_param(wapf, uint, 0644); 112MODULE_PARM_DESC(wapf, "WAPF value"); 113 114#define ASUS_HANDLE(object, paths...) \ 115 static acpi_handle object##_handle = NULL; \ 116 static char *object##_paths[] = { paths } 117 118/* LED */ 119ASUS_HANDLE(mled_set, ASUS_HOTK_PREFIX "MLED"); 120ASUS_HANDLE(tled_set, ASUS_HOTK_PREFIX "TLED"); 121ASUS_HANDLE(rled_set, ASUS_HOTK_PREFIX "RLED"); /* W1JC */ 122ASUS_HANDLE(pled_set, ASUS_HOTK_PREFIX "PLED"); /* A7J */ 123ASUS_HANDLE(gled_set, ASUS_HOTK_PREFIX "GLED"); /* G1, G2 (probably) */ 124 125/* LEDD */ 126ASUS_HANDLE(ledd_set, ASUS_HOTK_PREFIX "SLCM"); 127 128/* Bluetooth and WLAN 129 * WLED and BLED are not handled like other XLED, because in some dsdt 130 * they also control the WLAN/Bluetooth device. 131 */ 132ASUS_HANDLE(wl_switch, ASUS_HOTK_PREFIX "WLED"); 133ASUS_HANDLE(bt_switch, ASUS_HOTK_PREFIX "BLED"); 134ASUS_HANDLE(wireless_status, ASUS_HOTK_PREFIX "RSTS"); /* All new models */ 135 136/* Brightness */ 137ASUS_HANDLE(brightness_set, ASUS_HOTK_PREFIX "SPLV"); 138ASUS_HANDLE(brightness_get, ASUS_HOTK_PREFIX "GPLV"); 139 140/* Backlight */ 141ASUS_HANDLE(lcd_switch, "\\_SB.PCI0.SBRG.EC0._Q10", /* All new models */ 142 "\\_SB.PCI0.ISA.EC0._Q10", /* A1x */ 143 "\\_SB.PCI0.PX40.ECD0._Q10", /* L3C */ 144 "\\_SB.PCI0.PX40.EC0.Q10", /* M1A */ 145 "\\_SB.PCI0.LPCB.EC0._Q10", /* P30 */ 146 "\\_SB.PCI0.LPCB.EC0._Q0E", /* P30/P35 */ 147 "\\_SB.PCI0.PX40.Q10", /* S1x */ 148 "\\Q10"); /* A2x, L2D, L3D, M2E */ 149 150/* Display */ 151ASUS_HANDLE(display_set, ASUS_HOTK_PREFIX "SDSP"); 152ASUS_HANDLE(display_get, "\\_SB.PCI0.P0P1.VGA.GETD", /* A6B, A6K A6R A7D F3JM L4R M6R A3G 153 M6A M6V VX-1 V6J V6V W3Z */ 154 "\\_SB.PCI0.P0P2.VGA.GETD", /* A3E A4K, A4D A4L A6J A7J A8J Z71V M9V 155 S5A M5A z33A W1Jc W2V G1 */ 156 "\\_SB.PCI0.P0P3.VGA.GETD", /* A6V A6Q */ 157 "\\_SB.PCI0.P0PA.VGA.GETD", /* A6T, A6M */ 158 "\\_SB.PCI0.PCI1.VGAC.NMAP", /* L3C */ 159 "\\_SB.PCI0.VGA.GETD", /* Z96F */ 160 "\\ACTD", /* A2D */ 161 "\\ADVG", /* A4G Z71A W1N W5A W5F M2N M3N M5N M6N S1N S5N */ 162 "\\DNXT", /* P30 */ 163 "\\INFB", /* A2H D1 L2D L3D L3H L2E L5D L5C M1A M2E L4L W3V */ 164 "\\SSTE"); /* A3F A6F A3N A3L M6N W3N W6A */ 165 166ASUS_HANDLE(ls_switch, ASUS_HOTK_PREFIX "ALSC"); /* Z71A Z71V */ 167ASUS_HANDLE(ls_level, ASUS_HOTK_PREFIX "ALSL"); /* Z71A Z71V */ 168 169/* GPS */ 170/* R2H use different handle for GPS on/off */ 171ASUS_HANDLE(gps_on, ASUS_HOTK_PREFIX "SDON"); /* R2H */ 172ASUS_HANDLE(gps_off, ASUS_HOTK_PREFIX "SDOF"); /* R2H */ 173ASUS_HANDLE(gps_status, ASUS_HOTK_PREFIX "GPST"); 174 175/* 176 * This is the main structure, we can use it to store anything interesting 177 * about the hotk device 178 */ 179struct asus_hotk { 180 char *name; //laptop name 181 struct acpi_device *device; //the device we are in 182 acpi_handle handle; //the handle of the hotk device 183 char status; //status of the hotk, for LEDs, ... 184 u32 ledd_status; //status of the LED display 185 u8 light_level; //light sensor level 186 u8 light_switch; //light sensor switch value 187 u16 event_count[128]; //count for each event TODO make this better 188 struct input_dev *inputdev; 189 u16 *keycode_map; 190}; 191 192/* 193 * This header is made available to allow proper configuration given model, 194 * revision number , ... this info cannot go in struct asus_hotk because it is 195 * available before the hotk 196 */ 197static struct acpi_table_header *asus_info; 198 199/* The actual device the driver binds to */ 200static struct asus_hotk *hotk; 201 202/* 203 * The hotkey driver declaration 204 */ 205static const struct acpi_device_id asus_device_ids[] = { 206 {"ATK0100", 0}, 207 {"", 0}, 208}; 209MODULE_DEVICE_TABLE(acpi, asus_device_ids); 210 211static int asus_hotk_add(struct acpi_device *device); 212static int asus_hotk_remove(struct acpi_device *device, int type); 213static void asus_hotk_notify(struct acpi_device *device, u32 event); 214 215static struct acpi_driver asus_hotk_driver = { 216 .name = ASUS_HOTK_NAME, 217 .class = ASUS_HOTK_CLASS, 218 .ids = asus_device_ids, 219 .flags = ACPI_DRIVER_ALL_NOTIFY_EVENTS, 220 .ops = { 221 .add = asus_hotk_add, 222 .remove = asus_hotk_remove, 223 .notify = asus_hotk_notify, 224 }, 225}; 226 227/* The backlight device /sys/class/backlight */ 228static struct backlight_device *asus_backlight_device; 229 230/* 231 * The backlight class declaration 232 */ 233static int read_brightness(struct backlight_device *bd); 234static int update_bl_status(struct backlight_device *bd); 235static struct backlight_ops asusbl_ops = { 236 .get_brightness = read_brightness, 237 .update_status = update_bl_status, 238}; 239 240/* These functions actually update the LED's, and are called from a 241 * workqueue. By doing this as separate work rather than when the LED 242 * subsystem asks, we avoid messing with the Asus ACPI stuff during a 243 * potentially bad time, such as a timer interrupt. */ 244static struct workqueue_struct *led_workqueue; 245 246#define ASUS_LED(object, ledname) \ 247 static void object##_led_set(struct led_classdev *led_cdev, \ 248 enum led_brightness value); \ 249 static void object##_led_update(struct work_struct *ignored); \ 250 static int object##_led_wk; \ 251 static DECLARE_WORK(object##_led_work, object##_led_update); \ 252 static struct led_classdev object##_led = { \ 253 .name = "asus::" ledname, \ 254 .brightness_set = object##_led_set, \ 255 } 256 257ASUS_LED(mled, "mail"); 258ASUS_LED(tled, "touchpad"); 259ASUS_LED(rled, "record"); 260ASUS_LED(pled, "phone"); 261ASUS_LED(gled, "gaming"); 262 263struct key_entry { 264 char type; 265 u8 code; 266 u16 keycode; 267}; 268 269enum { KE_KEY, KE_END }; 270 271static struct key_entry asus_keymap[] = { 272 {KE_KEY, 0x30, KEY_VOLUMEUP}, 273 {KE_KEY, 0x31, KEY_VOLUMEDOWN}, 274 {KE_KEY, 0x32, KEY_MUTE}, 275 {KE_KEY, 0x33, KEY_SWITCHVIDEOMODE}, 276 {KE_KEY, 0x34, KEY_SWITCHVIDEOMODE}, 277 {KE_KEY, 0x40, KEY_PREVIOUSSONG}, 278 {KE_KEY, 0x41, KEY_NEXTSONG}, 279 {KE_KEY, 0x43, KEY_STOPCD}, 280 {KE_KEY, 0x45, KEY_PLAYPAUSE}, 281 {KE_KEY, 0x50, KEY_EMAIL}, 282 {KE_KEY, 0x51, KEY_WWW}, 283 {KE_KEY, 0x5C, KEY_SCREENLOCK}, /* Screenlock */ 284 {KE_KEY, 0x5D, KEY_WLAN}, 285 {KE_KEY, 0x61, KEY_SWITCHVIDEOMODE}, 286 {KE_KEY, 0x6B, BTN_TOUCH}, /* Lock Mouse */ 287 {KE_KEY, 0x82, KEY_CAMERA}, 288 {KE_KEY, 0x8A, KEY_PROG1}, 289 {KE_KEY, 0x95, KEY_MEDIA}, 290 {KE_KEY, 0x99, KEY_PHONE}, 291 {KE_END, 0}, 292}; 293 294/* 295 * This function evaluates an ACPI method, given an int as parameter, the 296 * method is searched within the scope of the handle, can be NULL. The output 297 * of the method is written is output, which can also be NULL 298 * 299 * returns 0 if write is successful, -1 else. 300 */ 301static int write_acpi_int(acpi_handle handle, const char *method, int val, 302 struct acpi_buffer *output) 303{ 304 struct acpi_object_list params; //list of input parameters (an int here) 305 union acpi_object in_obj; //the only param we use 306 acpi_status status; 307 308 if (!handle) 309 return 0; 310 311 params.count = 1; 312 params.pointer = &in_obj; 313 in_obj.type = ACPI_TYPE_INTEGER; 314 in_obj.integer.value = val; 315 316 status = acpi_evaluate_object(handle, (char *)method, ¶ms, output); 317 if (status == AE_OK) 318 return 0; 319 else 320 return -1; 321} 322 323static int read_wireless_status(int mask) 324{ 325 unsigned long long status; 326 acpi_status rv = AE_OK; 327 328 if (!wireless_status_handle) 329 return (hotk->status & mask) ? 1 : 0; 330 331 rv = acpi_evaluate_integer(wireless_status_handle, NULL, NULL, &status); 332 if (ACPI_FAILURE(rv)) 333 pr_warning("Error reading Wireless status\n"); 334 else 335 return (status & mask) ? 1 : 0; 336 337 return (hotk->status & mask) ? 1 : 0; 338} 339 340static int read_gps_status(void) 341{ 342 unsigned long long status; 343 acpi_status rv = AE_OK; 344 345 rv = acpi_evaluate_integer(gps_status_handle, NULL, NULL, &status); 346 if (ACPI_FAILURE(rv)) 347 pr_warning("Error reading GPS status\n"); 348 else 349 return status ? 1 : 0; 350 351 return (hotk->status & GPS_ON) ? 1 : 0; 352} 353 354/* Generic LED functions */ 355static int read_status(int mask) 356{ 357 /* There is a special method for both wireless devices */ 358 if (mask == BT_ON || mask == WL_ON) 359 return read_wireless_status(mask); 360 else if (mask == GPS_ON) 361 return read_gps_status(); 362 363 return (hotk->status & mask) ? 1 : 0; 364} 365 366static void write_status(acpi_handle handle, int out, int mask) 367{ 368 hotk->status = (out) ? (hotk->status | mask) : (hotk->status & ~mask); 369 370 switch (mask) { 371 case MLED_ON: 372 out = !(out & 0x1); 373 break; 374 case GLED_ON: 375 out = (out & 0x1) + 1; 376 break; 377 case GPS_ON: 378 handle = (out) ? gps_on_handle : gps_off_handle; 379 out = 0x02; 380 break; 381 default: 382 out &= 0x1; 383 break; 384 } 385 386 if (write_acpi_int(handle, NULL, out, NULL)) 387 pr_warning(" write failed %x\n", mask); 388} 389 390/* /sys/class/led handlers */ 391#define ASUS_LED_HANDLER(object, mask) \ 392 static void object##_led_set(struct led_classdev *led_cdev, \ 393 enum led_brightness value) \ 394 { \ 395 object##_led_wk = (value > 0) ? 1 : 0; \ 396 queue_work(led_workqueue, &object##_led_work); \ 397 } \ 398 static void object##_led_update(struct work_struct *ignored) \ 399 { \ 400 int value = object##_led_wk; \ 401 write_status(object##_set_handle, value, (mask)); \ 402 } 403 404ASUS_LED_HANDLER(mled, MLED_ON); 405ASUS_LED_HANDLER(pled, PLED_ON); 406ASUS_LED_HANDLER(rled, RLED_ON); 407ASUS_LED_HANDLER(tled, TLED_ON); 408ASUS_LED_HANDLER(gled, GLED_ON); 409 410static int get_lcd_state(void) 411{ 412 return read_status(LCD_ON); 413} 414 415static int set_lcd_state(int value) 416{ 417 int lcd = 0; 418 acpi_status status = 0; 419 420 lcd = value ? 1 : 0; 421 422 if (lcd == get_lcd_state()) 423 return 0; 424 425 if (lcd_switch_handle) { 426 status = acpi_evaluate_object(lcd_switch_handle, 427 NULL, NULL, NULL); 428 429 if (ACPI_FAILURE(status)) 430 pr_warning("Error switching LCD\n"); 431 } 432 433 write_status(NULL, lcd, LCD_ON); 434 return 0; 435} 436 437static void lcd_blank(int blank) 438{ 439 struct backlight_device *bd = asus_backlight_device; 440 441 if (bd) { 442 bd->props.power = blank; 443 backlight_update_status(bd); 444 } 445} 446 447static int read_brightness(struct backlight_device *bd) 448{ 449 unsigned long long value; 450 acpi_status rv = AE_OK; 451 452 rv = acpi_evaluate_integer(brightness_get_handle, NULL, NULL, &value); 453 if (ACPI_FAILURE(rv)) 454 pr_warning("Error reading brightness\n"); 455 456 return value; 457} 458 459static int set_brightness(struct backlight_device *bd, int value) 460{ 461 int ret = 0; 462 463 value = (0 < value) ? ((15 < value) ? 15 : value) : 0; 464 /* 0 <= value <= 15 */ 465 466 if (write_acpi_int(brightness_set_handle, NULL, value, NULL)) { 467 pr_warning("Error changing brightness\n"); 468 ret = -EIO; 469 } 470 471 return ret; 472} 473 474static int update_bl_status(struct backlight_device *bd) 475{ 476 int rv; 477 int value = bd->props.brightness; 478 479 rv = set_brightness(bd, value); 480 if (rv) 481 return rv; 482 483 value = (bd->props.power == FB_BLANK_UNBLANK) ? 1 : 0; 484 return set_lcd_state(value); 485} 486 487/* 488 * Platform device handlers 489 */ 490 491/* 492 * We write our info in page, we begin at offset off and cannot write more 493 * than count bytes. We set eof to 1 if we handle those 2 values. We return the 494 * number of bytes written in page 495 */ 496static ssize_t show_infos(struct device *dev, 497 struct device_attribute *attr, char *page) 498{ 499 int len = 0; 500 unsigned long long temp; 501 char buf[16]; //enough for all info 502 acpi_status rv = AE_OK; 503 504 /* 505 * We use the easy way, we don't care of off and count, so we don't set eof 506 * to 1 507 */ 508 509 len += sprintf(page, ASUS_HOTK_NAME " " ASUS_LAPTOP_VERSION "\n"); 510 len += sprintf(page + len, "Model reference : %s\n", hotk->name); 511 /* 512 * The SFUN method probably allows the original driver to get the list 513 * of features supported by a given model. For now, 0x0100 or 0x0800 514 * bit signifies that the laptop is equipped with a Wi-Fi MiniPCI card. 515 * The significance of others is yet to be found. 516 */ 517 rv = acpi_evaluate_integer(hotk->handle, "SFUN", NULL, &temp); 518 if (!ACPI_FAILURE(rv)) 519 len += sprintf(page + len, "SFUN value : %#x\n", 520 (uint) temp); 521 /* 522 * The HWRS method return informations about the hardware. 523 * 0x80 bit is for WLAN, 0x100 for Bluetooth. 524 * The significance of others is yet to be found. 525 * If we don't find the method, we assume the device are present. 526 */ 527 rv = acpi_evaluate_integer(hotk->handle, "HRWS", NULL, &temp); 528 if (!ACPI_FAILURE(rv)) 529 len += sprintf(page + len, "HRWS value : %#x\n", 530 (uint) temp); 531 /* 532 * Another value for userspace: the ASYM method returns 0x02 for 533 * battery low and 0x04 for battery critical, its readings tend to be 534 * more accurate than those provided by _BST. 535 * Note: since not all the laptops provide this method, errors are 536 * silently ignored. 537 */ 538 rv = acpi_evaluate_integer(hotk->handle, "ASYM", NULL, &temp); 539 if (!ACPI_FAILURE(rv)) 540 len += sprintf(page + len, "ASYM value : %#x\n", 541 (uint) temp); 542 if (asus_info) { 543 snprintf(buf, 16, "%d", asus_info->length); 544 len += sprintf(page + len, "DSDT length : %s\n", buf); 545 snprintf(buf, 16, "%d", asus_info->checksum); 546 len += sprintf(page + len, "DSDT checksum : %s\n", buf); 547 snprintf(buf, 16, "%d", asus_info->revision); 548 len += sprintf(page + len, "DSDT revision : %s\n", buf); 549 snprintf(buf, 7, "%s", asus_info->oem_id); 550 len += sprintf(page + len, "OEM id : %s\n", buf); 551 snprintf(buf, 9, "%s", asus_info->oem_table_id); 552 len += sprintf(page + len, "OEM table id : %s\n", buf); 553 snprintf(buf, 16, "%x", asus_info->oem_revision); 554 len += sprintf(page + len, "OEM revision : 0x%s\n", buf); 555 snprintf(buf, 5, "%s", asus_info->asl_compiler_id); 556 len += sprintf(page + len, "ASL comp vendor id : %s\n", buf); 557 snprintf(buf, 16, "%x", asus_info->asl_compiler_revision); 558 len += sprintf(page + len, "ASL comp revision : 0x%s\n", buf); 559 } 560 561 return len; 562} 563 564static int parse_arg(const char *buf, unsigned long count, int *val) 565{ 566 if (!count) 567 return 0; 568 if (count > 31) 569 return -EINVAL; 570 if (sscanf(buf, "%i", val) != 1) 571 return -EINVAL; 572 return count; 573} 574 575static ssize_t store_status(const char *buf, size_t count, 576 acpi_handle handle, int mask) 577{ 578 int rv, value; 579 int out = 0; 580 581 rv = parse_arg(buf, count, &value); 582 if (rv > 0) 583 out = value ? 1 : 0; 584 585 write_status(handle, out, mask); 586 587 return rv; 588} 589 590/* 591 * LEDD display 592 */ 593static ssize_t show_ledd(struct device *dev, 594 struct device_attribute *attr, char *buf) 595{ 596 return sprintf(buf, "0x%08x\n", hotk->ledd_status); 597} 598 599static ssize_t store_ledd(struct device *dev, struct device_attribute *attr, 600 const char *buf, size_t count) 601{ 602 int rv, value; 603 604 rv = parse_arg(buf, count, &value); 605 if (rv > 0) { 606 if (write_acpi_int(ledd_set_handle, NULL, value, NULL)) 607 pr_warning("LED display write failed\n"); 608 else 609 hotk->ledd_status = (u32) value; 610 } 611 return rv; 612} 613 614/* 615 * WLAN 616 */ 617static ssize_t show_wlan(struct device *dev, 618 struct device_attribute *attr, char *buf) 619{ 620 return sprintf(buf, "%d\n", read_status(WL_ON)); 621} 622 623static ssize_t store_wlan(struct device *dev, struct device_attribute *attr, 624 const char *buf, size_t count) 625{ 626 return store_status(buf, count, wl_switch_handle, WL_ON); 627} 628 629/* 630 * Bluetooth 631 */ 632static ssize_t show_bluetooth(struct device *dev, 633 struct device_attribute *attr, char *buf) 634{ 635 return sprintf(buf, "%d\n", read_status(BT_ON)); 636} 637 638static ssize_t store_bluetooth(struct device *dev, 639 struct device_attribute *attr, const char *buf, 640 size_t count) 641{ 642 return store_status(buf, count, bt_switch_handle, BT_ON); 643} 644 645/* 646 * Display 647 */ 648static void set_display(int value) 649{ 650 /* no sanity check needed for now */ 651 if (write_acpi_int(display_set_handle, NULL, value, NULL)) 652 pr_warning("Error setting display\n"); 653 return; 654} 655 656static int read_display(void) 657{ 658 unsigned long long value = 0; 659 acpi_status rv = AE_OK; 660 661 /* In most of the case, we know how to set the display, but sometime 662 we can't read it */ 663 if (display_get_handle) { 664 rv = acpi_evaluate_integer(display_get_handle, NULL, 665 NULL, &value); 666 if (ACPI_FAILURE(rv)) 667 pr_warning("Error reading display status\n"); 668 } 669 670 value &= 0x0F; /* needed for some models, shouldn't hurt others */ 671 672 return value; 673} 674 675/* 676 * Now, *this* one could be more user-friendly, but so far, no-one has 677 * complained. The significance of bits is the same as in store_disp() 678 */ 679static ssize_t show_disp(struct device *dev, 680 struct device_attribute *attr, char *buf) 681{ 682 return sprintf(buf, "%d\n", read_display()); 683} 684 685/* 686 * Experimental support for display switching. As of now: 1 should activate 687 * the LCD output, 2 should do for CRT, 4 for TV-Out and 8 for DVI. 688 * Any combination (bitwise) of these will suffice. I never actually tested 4 689 * displays hooked up simultaneously, so be warned. See the acpi4asus README 690 * for more info. 691 */ 692static ssize_t store_disp(struct device *dev, struct device_attribute *attr, 693 const char *buf, size_t count) 694{ 695 int rv, value; 696 697 rv = parse_arg(buf, count, &value); 698 if (rv > 0) 699 set_display(value); 700 return rv; 701} 702 703/* 704 * Light Sens 705 */ 706static void set_light_sens_switch(int value) 707{ 708 if (write_acpi_int(ls_switch_handle, NULL, value, NULL)) 709 pr_warning("Error setting light sensor switch\n"); 710 hotk->light_switch = value; 711} 712 713static ssize_t show_lssw(struct device *dev, 714 struct device_attribute *attr, char *buf) 715{ 716 return sprintf(buf, "%d\n", hotk->light_switch); 717} 718 719static ssize_t store_lssw(struct device *dev, struct device_attribute *attr, 720 const char *buf, size_t count) 721{ 722 int rv, value; 723 724 rv = parse_arg(buf, count, &value); 725 if (rv > 0) 726 set_light_sens_switch(value ? 1 : 0); 727 728 return rv; 729} 730 731static void set_light_sens_level(int value) 732{ 733 if (write_acpi_int(ls_level_handle, NULL, value, NULL)) 734 pr_warning("Error setting light sensor level\n"); 735 hotk->light_level = value; 736} 737 738static ssize_t show_lslvl(struct device *dev, 739 struct device_attribute *attr, char *buf) 740{ 741 return sprintf(buf, "%d\n", hotk->light_level); 742} 743 744static ssize_t store_lslvl(struct device *dev, struct device_attribute *attr, 745 const char *buf, size_t count) 746{ 747 int rv, value; 748 749 rv = parse_arg(buf, count, &value); 750 if (rv > 0) { 751 value = (0 < value) ? ((15 < value) ? 15 : value) : 0; 752 /* 0 <= value <= 15 */ 753 set_light_sens_level(value); 754 } 755 756 return rv; 757} 758 759/* 760 * GPS 761 */ 762static ssize_t show_gps(struct device *dev, 763 struct device_attribute *attr, char *buf) 764{ 765 return sprintf(buf, "%d\n", read_status(GPS_ON)); 766} 767 768static ssize_t store_gps(struct device *dev, struct device_attribute *attr, 769 const char *buf, size_t count) 770{ 771 return store_status(buf, count, NULL, GPS_ON); 772} 773 774/* 775 * Hotkey functions 776 */ 777static struct key_entry *asus_get_entry_by_scancode(int code) 778{ 779 struct key_entry *key; 780 781 for (key = asus_keymap; key->type != KE_END; key++) 782 if (code == key->code) 783 return key; 784 785 return NULL; 786} 787 788static struct key_entry *asus_get_entry_by_keycode(int code) 789{ 790 struct key_entry *key; 791 792 for (key = asus_keymap; key->type != KE_END; key++) 793 if (code == key->keycode && key->type == KE_KEY) 794 return key; 795 796 return NULL; 797} 798 799static int asus_getkeycode(struct input_dev *dev, int scancode, int *keycode) 800{ 801 struct key_entry *key = asus_get_entry_by_scancode(scancode); 802 803 if (key && key->type == KE_KEY) { 804 *keycode = key->keycode; 805 return 0; 806 } 807 808 return -EINVAL; 809} 810 811static int asus_setkeycode(struct input_dev *dev, int scancode, int keycode) 812{ 813 struct key_entry *key; 814 int old_keycode; 815 816 if (keycode < 0 || keycode > KEY_MAX) 817 return -EINVAL; 818 819 key = asus_get_entry_by_scancode(scancode); 820 if (key && key->type == KE_KEY) { 821 old_keycode = key->keycode; 822 key->keycode = keycode; 823 set_bit(keycode, dev->keybit); 824 if (!asus_get_entry_by_keycode(old_keycode)) 825 clear_bit(old_keycode, dev->keybit); 826 return 0; 827 } 828 829 return -EINVAL; 830} 831 832static void asus_hotk_notify(struct acpi_device *device, u32 event) 833{ 834 static struct key_entry *key; 835 u16 count; 836 837 /* TODO Find a better way to handle events count. */ 838 if (!hotk) 839 return; 840 841 /* 842 * We need to tell the backlight device when the backlight power is 843 * switched 844 */ 845 if (event == ATKD_LCD_ON) { 846 write_status(NULL, 1, LCD_ON); 847 lcd_blank(FB_BLANK_UNBLANK); 848 } else if (event == ATKD_LCD_OFF) { 849 write_status(NULL, 0, LCD_ON); 850 lcd_blank(FB_BLANK_POWERDOWN); 851 } 852 853 count = hotk->event_count[event % 128]++; 854 acpi_bus_generate_proc_event(hotk->device, event, count); 855 acpi_bus_generate_netlink_event(hotk->device->pnp.device_class, 856 dev_name(&hotk->device->dev), event, 857 count); 858 859 if (hotk->inputdev) { 860 key = asus_get_entry_by_scancode(event); 861 if (!key) 862 return ; 863 864 switch (key->type) { 865 case KE_KEY: 866 input_report_key(hotk->inputdev, key->keycode, 1); 867 input_sync(hotk->inputdev); 868 input_report_key(hotk->inputdev, key->keycode, 0); 869 input_sync(hotk->inputdev); 870 break; 871 } 872 } 873} 874 875#define ASUS_CREATE_DEVICE_ATTR(_name) \ 876 struct device_attribute dev_attr_##_name = { \ 877 .attr = { \ 878 .name = __stringify(_name), \ 879 .mode = 0 }, \ 880 .show = NULL, \ 881 .store = NULL, \ 882 } 883 884#define ASUS_SET_DEVICE_ATTR(_name, _mode, _show, _store) \ 885 do { \ 886 dev_attr_##_name.attr.mode = _mode; \ 887 dev_attr_##_name.show = _show; \ 888 dev_attr_##_name.store = _store; \ 889 } while(0) 890 891static ASUS_CREATE_DEVICE_ATTR(infos); 892static ASUS_CREATE_DEVICE_ATTR(wlan); 893static ASUS_CREATE_DEVICE_ATTR(bluetooth); 894static ASUS_CREATE_DEVICE_ATTR(display); 895static ASUS_CREATE_DEVICE_ATTR(ledd); 896static ASUS_CREATE_DEVICE_ATTR(ls_switch); 897static ASUS_CREATE_DEVICE_ATTR(ls_level); 898static ASUS_CREATE_DEVICE_ATTR(gps); 899 900static struct attribute *asuspf_attributes[] = { 901 &dev_attr_infos.attr, 902 &dev_attr_wlan.attr, 903 &dev_attr_bluetooth.attr, 904 &dev_attr_display.attr, 905 &dev_attr_ledd.attr, 906 &dev_attr_ls_switch.attr, 907 &dev_attr_ls_level.attr, 908 &dev_attr_gps.attr, 909 NULL 910}; 911 912static struct attribute_group asuspf_attribute_group = { 913 .attrs = asuspf_attributes 914}; 915 916static struct platform_driver asuspf_driver = { 917 .driver = { 918 .name = ASUS_HOTK_FILE, 919 .owner = THIS_MODULE, 920 } 921}; 922 923static struct platform_device *asuspf_device; 924 925static void asus_hotk_add_fs(void) 926{ 927 ASUS_SET_DEVICE_ATTR(infos, 0444, show_infos, NULL); 928 929 if (wl_switch_handle) 930 ASUS_SET_DEVICE_ATTR(wlan, 0644, show_wlan, store_wlan); 931 932 if (bt_switch_handle) 933 ASUS_SET_DEVICE_ATTR(bluetooth, 0644, 934 show_bluetooth, store_bluetooth); 935 936 if (display_set_handle && display_get_handle) 937 ASUS_SET_DEVICE_ATTR(display, 0644, show_disp, store_disp); 938 else if (display_set_handle) 939 ASUS_SET_DEVICE_ATTR(display, 0200, NULL, store_disp); 940 941 if (ledd_set_handle) 942 ASUS_SET_DEVICE_ATTR(ledd, 0644, show_ledd, store_ledd); 943 944 if (ls_switch_handle && ls_level_handle) { 945 ASUS_SET_DEVICE_ATTR(ls_level, 0644, show_lslvl, store_lslvl); 946 ASUS_SET_DEVICE_ATTR(ls_switch, 0644, show_lssw, store_lssw); 947 } 948 949 if (gps_status_handle && gps_on_handle && gps_off_handle) 950 ASUS_SET_DEVICE_ATTR(gps, 0644, show_gps, store_gps); 951} 952 953static int asus_handle_init(char *name, acpi_handle * handle, 954 char **paths, int num_paths) 955{ 956 int i; 957 acpi_status status; 958 959 for (i = 0; i < num_paths; i++) { 960 status = acpi_get_handle(NULL, paths[i], handle); 961 if (ACPI_SUCCESS(status)) 962 return 0; 963 } 964 965 *handle = NULL; 966 return -ENODEV; 967} 968 969#define ASUS_HANDLE_INIT(object) \ 970 asus_handle_init(#object, &object##_handle, object##_paths, \ 971 ARRAY_SIZE(object##_paths)) 972 973/* 974 * This function is used to initialize the hotk with right values. In this 975 * method, we can make all the detection we want, and modify the hotk struct 976 */ 977static int asus_hotk_get_info(void) 978{ 979 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; 980 union acpi_object *model = NULL; 981 unsigned long long bsts_result, hwrs_result; 982 char *string = NULL; 983 acpi_status status; 984 985 /* 986 * Get DSDT headers early enough to allow for differentiating between 987 * models, but late enough to allow acpi_bus_register_driver() to fail 988 * before doing anything ACPI-specific. Should we encounter a machine, 989 * which needs special handling (i.e. its hotkey device has a different 990 * HID), this bit will be moved. A global variable asus_info contains 991 * the DSDT header. 992 */ 993 status = acpi_get_table(ACPI_SIG_DSDT, 1, &asus_info); 994 if (ACPI_FAILURE(status)) 995 pr_warning("Couldn't get the DSDT table header\n"); 996 997 /* We have to write 0 on init this far for all ASUS models */ 998 if (write_acpi_int(hotk->handle, "INIT", 0, &buffer)) { 999 pr_err("Hotkey initialization failed\n"); 1000 return -ENODEV; 1001 } 1002 1003 /* This needs to be called for some laptops to init properly */ 1004 status = 1005 acpi_evaluate_integer(hotk->handle, "BSTS", NULL, &bsts_result); 1006 if (ACPI_FAILURE(status)) 1007 pr_warning("Error calling BSTS\n"); 1008 else if (bsts_result) 1009 pr_notice("BSTS called, 0x%02x returned\n", 1010 (uint) bsts_result); 1011 1012 /* This too ... */ 1013 write_acpi_int(hotk->handle, "CWAP", wapf, NULL); 1014 1015 /* 1016 * Try to match the object returned by INIT to the specific model. 1017 * Handle every possible object (or the lack of thereof) the DSDT 1018 * writers might throw at us. When in trouble, we pass NULL to 1019 * asus_model_match() and try something completely different. 1020 */ 1021 if (buffer.pointer) { 1022 model = buffer.pointer; 1023 switch (model->type) { 1024 case ACPI_TYPE_STRING: 1025 string = model->string.pointer; 1026 break; 1027 case ACPI_TYPE_BUFFER: 1028 string = model->buffer.pointer; 1029 break; 1030 default: 1031 string = ""; 1032 break; 1033 } 1034 } 1035 hotk->name = kstrdup(string, GFP_KERNEL); 1036 if (!hotk->name) 1037 return -ENOMEM; 1038 1039 if (*string) 1040 pr_notice(" %s model detected\n", string); 1041 1042 ASUS_HANDLE_INIT(mled_set); 1043 ASUS_HANDLE_INIT(tled_set); 1044 ASUS_HANDLE_INIT(rled_set); 1045 ASUS_HANDLE_INIT(pled_set); 1046 ASUS_HANDLE_INIT(gled_set); 1047 1048 ASUS_HANDLE_INIT(ledd_set); 1049 1050 /* 1051 * The HWRS method return informations about the hardware. 1052 * 0x80 bit is for WLAN, 0x100 for Bluetooth. 1053 * The significance of others is yet to be found. 1054 * If we don't find the method, we assume the device are present. 1055 */ 1056 status = 1057 acpi_evaluate_integer(hotk->handle, "HRWS", NULL, &hwrs_result); 1058 if (ACPI_FAILURE(status)) 1059 hwrs_result = WL_HWRS | BT_HWRS; 1060 1061 if (hwrs_result & WL_HWRS) 1062 ASUS_HANDLE_INIT(wl_switch); 1063 if (hwrs_result & BT_HWRS) 1064 ASUS_HANDLE_INIT(bt_switch); 1065 1066 ASUS_HANDLE_INIT(wireless_status); 1067 1068 ASUS_HANDLE_INIT(brightness_set); 1069 ASUS_HANDLE_INIT(brightness_get); 1070 1071 ASUS_HANDLE_INIT(lcd_switch); 1072 1073 ASUS_HANDLE_INIT(display_set); 1074 ASUS_HANDLE_INIT(display_get); 1075 1076 /* There is a lot of models with "ALSL", but a few get 1077 a real light sens, so we need to check it. */ 1078 if (!ASUS_HANDLE_INIT(ls_switch)) 1079 ASUS_HANDLE_INIT(ls_level); 1080 1081 ASUS_HANDLE_INIT(gps_on); 1082 ASUS_HANDLE_INIT(gps_off); 1083 ASUS_HANDLE_INIT(gps_status); 1084 1085 kfree(model); 1086 1087 return AE_OK; 1088} 1089 1090static int asus_input_init(void) 1091{ 1092 const struct key_entry *key; 1093 int result; 1094 1095 hotk->inputdev = input_allocate_device(); 1096 if (!hotk->inputdev) { 1097 pr_info("Unable to allocate input device\n"); 1098 return 0; 1099 } 1100 hotk->inputdev->name = "Asus Laptop extra buttons"; 1101 hotk->inputdev->phys = ASUS_HOTK_FILE "/input0"; 1102 hotk->inputdev->id.bustype = BUS_HOST; 1103 hotk->inputdev->getkeycode = asus_getkeycode; 1104 hotk->inputdev->setkeycode = asus_setkeycode; 1105 1106 for (key = asus_keymap; key->type != KE_END; key++) { 1107 switch (key->type) { 1108 case KE_KEY: 1109 set_bit(EV_KEY, hotk->inputdev->evbit); 1110 set_bit(key->keycode, hotk->inputdev->keybit); 1111 break; 1112 } 1113 } 1114 result = input_register_device(hotk->inputdev); 1115 if (result) { 1116 pr_info("Unable to register input device\n"); 1117 input_free_device(hotk->inputdev); 1118 } 1119 return result; 1120} 1121 1122static int asus_hotk_check(void) 1123{ 1124 int result = 0; 1125 1126 result = acpi_bus_get_status(hotk->device); 1127 if (result) 1128 return result; 1129 1130 if (hotk->device->status.present) { 1131 result = asus_hotk_get_info(); 1132 } else { 1133 pr_err("Hotkey device not present, aborting\n"); 1134 return -EINVAL; 1135 } 1136 1137 return result; 1138} 1139 1140static int asus_hotk_found; 1141 1142static int asus_hotk_add(struct acpi_device *device) 1143{ 1144 int result; 1145 1146 if (!device) 1147 return -EINVAL; 1148 1149 pr_notice("Asus Laptop Support version %s\n", 1150 ASUS_LAPTOP_VERSION); 1151 1152 hotk = kzalloc(sizeof(struct asus_hotk), GFP_KERNEL); 1153 if (!hotk) 1154 return -ENOMEM; 1155 1156 hotk->handle = device->handle; 1157 strcpy(acpi_device_name(device), ASUS_HOTK_DEVICE_NAME); 1158 strcpy(acpi_device_class(device), ASUS_HOTK_CLASS); 1159 device->driver_data = hotk; 1160 hotk->device = device; 1161 1162 result = asus_hotk_check(); 1163 if (result) 1164 goto end; 1165 1166 asus_hotk_add_fs(); 1167 1168 asus_hotk_found = 1; 1169 1170 /* WLED and BLED are on by default */ 1171 write_status(bt_switch_handle, 1, BT_ON); 1172 write_status(wl_switch_handle, 1, WL_ON); 1173 1174 /* If the h/w switch is off, we need to check the real status */ 1175 write_status(NULL, read_status(BT_ON), BT_ON); 1176 write_status(NULL, read_status(WL_ON), WL_ON); 1177 1178 /* LCD Backlight is on by default */ 1179 write_status(NULL, 1, LCD_ON); 1180 1181 /* LED display is off by default */ 1182 hotk->ledd_status = 0xFFF; 1183 1184 /* Set initial values of light sensor and level */ 1185 hotk->light_switch = 1; /* Default to light sensor disabled */ 1186 hotk->light_level = 0; /* level 5 for sensor sensitivity */ 1187 1188 if (ls_switch_handle) 1189 set_light_sens_switch(hotk->light_switch); 1190 1191 if (ls_level_handle) 1192 set_light_sens_level(hotk->light_level); 1193 1194 /* GPS is on by default */ 1195 write_status(NULL, 1, GPS_ON); 1196 1197end: 1198 if (result) { 1199 kfree(hotk->name); 1200 kfree(hotk); 1201 } 1202 1203 return result; 1204} 1205 1206static int asus_hotk_remove(struct acpi_device *device, int type) 1207{ 1208 if (!device || !acpi_driver_data(device)) 1209 return -EINVAL; 1210 1211 kfree(hotk->name); 1212 kfree(hotk); 1213 1214 return 0; 1215} 1216 1217static void asus_backlight_exit(void) 1218{ 1219 if (asus_backlight_device) 1220 backlight_device_unregister(asus_backlight_device); 1221} 1222 1223#define ASUS_LED_UNREGISTER(object) \ 1224 if (object##_led.dev) \ 1225 led_classdev_unregister(&object##_led) 1226 1227static void asus_led_exit(void) 1228{ 1229 destroy_workqueue(led_workqueue); 1230 ASUS_LED_UNREGISTER(mled); 1231 ASUS_LED_UNREGISTER(tled); 1232 ASUS_LED_UNREGISTER(pled); 1233 ASUS_LED_UNREGISTER(rled); 1234 ASUS_LED_UNREGISTER(gled); 1235} 1236 1237static void asus_input_exit(void) 1238{ 1239 if (hotk->inputdev) 1240 input_unregister_device(hotk->inputdev); 1241} 1242 1243static void __exit asus_laptop_exit(void) 1244{ 1245 asus_backlight_exit(); 1246 asus_led_exit(); 1247 asus_input_exit(); 1248 1249 acpi_bus_unregister_driver(&asus_hotk_driver); 1250 sysfs_remove_group(&asuspf_device->dev.kobj, &asuspf_attribute_group); 1251 platform_device_unregister(asuspf_device); 1252 platform_driver_unregister(&asuspf_driver); 1253} 1254 1255static int asus_backlight_init(struct device *dev) 1256{ 1257 struct backlight_device *bd; 1258 1259 if (brightness_set_handle && lcd_switch_handle) { 1260 bd = backlight_device_register(ASUS_HOTK_FILE, dev, 1261 NULL, &asusbl_ops); 1262 if (IS_ERR(bd)) { 1263 pr_err("Could not register asus backlight device\n"); 1264 asus_backlight_device = NULL; 1265 return PTR_ERR(bd); 1266 } 1267 1268 asus_backlight_device = bd; 1269 1270 bd->props.max_brightness = 15; 1271 bd->props.brightness = read_brightness(NULL); 1272 bd->props.power = FB_BLANK_UNBLANK; 1273 backlight_update_status(bd); 1274 } 1275 return 0; 1276} 1277 1278static int asus_led_register(acpi_handle handle, 1279 struct led_classdev *ldev, struct device *dev) 1280{ 1281 if (!handle) 1282 return 0; 1283 1284 return led_classdev_register(dev, ldev); 1285} 1286 1287#define ASUS_LED_REGISTER(object, device) \ 1288 asus_led_register(object##_set_handle, &object##_led, device) 1289 1290static int asus_led_init(struct device *dev) 1291{ 1292 int rv; 1293 1294 rv = ASUS_LED_REGISTER(mled, dev); 1295 if (rv) 1296 goto out; 1297 1298 rv = ASUS_LED_REGISTER(tled, dev); 1299 if (rv) 1300 goto out1; 1301 1302 rv = ASUS_LED_REGISTER(rled, dev); 1303 if (rv) 1304 goto out2; 1305 1306 rv = ASUS_LED_REGISTER(pled, dev); 1307 if (rv) 1308 goto out3; 1309 1310 rv = ASUS_LED_REGISTER(gled, dev); 1311 if (rv) 1312 goto out4; 1313 1314 led_workqueue = create_singlethread_workqueue("led_workqueue"); 1315 if (!led_workqueue) 1316 goto out5; 1317 1318 return 0; 1319out5: 1320 rv = -ENOMEM; 1321 ASUS_LED_UNREGISTER(gled); 1322out4: 1323 ASUS_LED_UNREGISTER(pled); 1324out3: 1325 ASUS_LED_UNREGISTER(rled); 1326out2: 1327 ASUS_LED_UNREGISTER(tled); 1328out1: 1329 ASUS_LED_UNREGISTER(mled); 1330out: 1331 return rv; 1332} 1333 1334static int __init asus_laptop_init(void) 1335{ 1336 int result; 1337 1338 if (acpi_disabled) 1339 return -ENODEV; 1340 1341 result = acpi_bus_register_driver(&asus_hotk_driver); 1342 if (result < 0) 1343 return result; 1344 1345 /* 1346 * This is a bit of a kludge. We only want this module loaded 1347 * for ASUS systems, but there's currently no way to probe the 1348 * ACPI namespace for ASUS HIDs. So we just return failure if 1349 * we didn't find one, which will cause the module to be 1350 * unloaded. 1351 */ 1352 if (!asus_hotk_found) { 1353 acpi_bus_unregister_driver(&asus_hotk_driver); 1354 return -ENODEV; 1355 } 1356 1357 result = asus_input_init(); 1358 if (result) 1359 goto fail_input; 1360 1361 /* Register platform stuff */ 1362 result = platform_driver_register(&asuspf_driver); 1363 if (result) 1364 goto fail_platform_driver; 1365 1366 asuspf_device = platform_device_alloc(ASUS_HOTK_FILE, -1); 1367 if (!asuspf_device) { 1368 result = -ENOMEM; 1369 goto fail_platform_device1; 1370 } 1371 1372 result = platform_device_add(asuspf_device); 1373 if (result) 1374 goto fail_platform_device2; 1375 1376 result = sysfs_create_group(&asuspf_device->dev.kobj, 1377 &asuspf_attribute_group); 1378 if (result) 1379 goto fail_sysfs; 1380 1381 result = asus_led_init(&asuspf_device->dev); 1382 if (result) 1383 goto fail_led; 1384 1385 if (!acpi_video_backlight_support()) { 1386 result = asus_backlight_init(&asuspf_device->dev); 1387 if (result) 1388 goto fail_backlight; 1389 } else 1390 pr_info("Brightness ignored, must be controlled by " 1391 "ACPI video driver\n"); 1392 1393 return 0; 1394 1395fail_backlight: 1396 asus_led_exit(); 1397 1398fail_led: 1399 sysfs_remove_group(&asuspf_device->dev.kobj, 1400 &asuspf_attribute_group); 1401 1402fail_sysfs: 1403 platform_device_del(asuspf_device); 1404 1405fail_platform_device2: 1406 platform_device_put(asuspf_device); 1407 1408fail_platform_device1: 1409 platform_driver_unregister(&asuspf_driver); 1410 1411fail_platform_driver: 1412 asus_input_exit(); 1413 1414fail_input: 1415 1416 return result; 1417} 1418 1419module_init(asus_laptop_init); 1420module_exit(asus_laptop_exit); 1421