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 97 MODULE_AUTHOR("Julien Lerouge, Karol Kozimor, Corentin Chary"); 98 MODULE_DESCRIPTION(ASUS_HOTK_NAME); 99 MODULE_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 */ 110 static uint wapf = 1; 111 module_param(wapf, uint, 0644); 112 MODULE_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 */ 119 ASUS_HANDLE(mled_set, ASUS_HOTK_PREFIX "MLED"); 120 ASUS_HANDLE(tled_set, ASUS_HOTK_PREFIX "TLED"); 121 ASUS_HANDLE(rled_set, ASUS_HOTK_PREFIX "RLED"); /* W1JC */ 122 ASUS_HANDLE(pled_set, ASUS_HOTK_PREFIX "PLED"); /* A7J */ 123 ASUS_HANDLE(gled_set, ASUS_HOTK_PREFIX "GLED"); /* G1, G2 (probably) */ 124 125 /* LEDD */ 126 ASUS_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 */ 132 ASUS_HANDLE(wl_switch, ASUS_HOTK_PREFIX "WLED"); 133 ASUS_HANDLE(bt_switch, ASUS_HOTK_PREFIX "BLED"); 134 ASUS_HANDLE(wireless_status, ASUS_HOTK_PREFIX "RSTS"); /* All new models */ 135 136 /* Brightness */ 137 ASUS_HANDLE(brightness_set, ASUS_HOTK_PREFIX "SPLV"); 138 ASUS_HANDLE(brightness_get, ASUS_HOTK_PREFIX "GPLV"); 139 140 /* Backlight */ 141 ASUS_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 */ 151 ASUS_HANDLE(display_set, ASUS_HOTK_PREFIX "SDSP"); 152 ASUS_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 */ 165 166 ASUS_HANDLE(ls_switch, ASUS_HOTK_PREFIX "ALSC"); /* Z71A Z71V */ 167 ASUS_HANDLE(ls_level, ASUS_HOTK_PREFIX "ALSL"); /* Z71A Z71V */ 168 169 /* GPS */ 170 /* R2H use different handle for GPS on/off */ 171 ASUS_HANDLE(gps_on, ASUS_HOTK_PREFIX "SDON"); /* R2H */ 172 ASUS_HANDLE(gps_off, ASUS_HOTK_PREFIX "SDOF"); /* R2H */ 173 ASUS_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 */ 179 struct 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 */ 197 static struct acpi_table_header *asus_info; 198 199 /* The actual device the driver binds to */ 200 static struct asus_hotk *hotk; 201 202 /* 203 * The hotkey driver declaration 204 */ 205 static const struct acpi_device_id asus_device_ids[] = { 206 {"ATK0100", 0}, 207 {"", 0}, 208 }; 209 MODULE_DEVICE_TABLE(acpi, asus_device_ids); 210 211 static int asus_hotk_add(struct acpi_device *device); 212 static int asus_hotk_remove(struct acpi_device *device, int type); 213 static void asus_hotk_notify(struct acpi_device *device, u32 event); 214 215 static 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 */ 228 static struct backlight_device *asus_backlight_device; 229 230 /* 231 * The backlight class declaration 232 */ 233 static int read_brightness(struct backlight_device *bd); 234 static int update_bl_status(struct backlight_device *bd); 235 static 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. */ 244 static 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 } 256 257 ASUS_LED(mled, "mail"); 258 ASUS_LED(tled, "touchpad"); 259 ASUS_LED(rled, "record"); 260 ASUS_LED(pled, "phone"); 261 ASUS_LED(gled, "gaming"); 262 263 struct key_entry { 264 char type; 265 u8 code; 266 u16 keycode; 267 }; 268 269 enum { KE_KEY, KE_END }; 270 271 static 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 */ 301 static 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 } 322 323 static 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 } 339 340 static 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 */ 355 static 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 } 365 366 static 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 } 403 404 ASUS_LED_HANDLER(mled, MLED_ON); 405 ASUS_LED_HANDLER(pled, PLED_ON); 406 ASUS_LED_HANDLER(rled, RLED_ON); 407 ASUS_LED_HANDLER(tled, TLED_ON); 408 ASUS_LED_HANDLER(gled, GLED_ON); 409 410 static int get_lcd_state(void) 411 { 412 return read_status(LCD_ON); 413 } 414 415 static 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 } 436 437 static 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 } 446 447 static 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 } 458 459 static 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 } 473 474 static 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 */ 496 static 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 : 0x%04x\n", 520 (uint) temp); 521 /* 522 * Another value for userspace: the ASYM method returns 0x02 for 523 * battery low and 0x04 for battery critical, its readings tend to be 524 * more accurate than those provided by _BST. 525 * Note: since not all the laptops provide this method, errors are 526 * silently ignored. 527 */ 528 rv = acpi_evaluate_integer(hotk->handle, "ASYM", NULL, &temp); 529 if (!ACPI_FAILURE(rv)) 530 len += sprintf(page + len, "ASYM value : 0x%04x\n", 531 (uint) temp); 532 if (asus_info) { 533 snprintf(buf, 16, "%d", asus_info->length); 534 len += sprintf(page + len, "DSDT length : %s\n", buf); 535 snprintf(buf, 16, "%d", asus_info->checksum); 536 len += sprintf(page + len, "DSDT checksum : %s\n", buf); 537 snprintf(buf, 16, "%d", asus_info->revision); 538 len += sprintf(page + len, "DSDT revision : %s\n", buf); 539 snprintf(buf, 7, "%s", asus_info->oem_id); 540 len += sprintf(page + len, "OEM id : %s\n", buf); 541 snprintf(buf, 9, "%s", asus_info->oem_table_id); 542 len += sprintf(page + len, "OEM table id : %s\n", buf); 543 snprintf(buf, 16, "%x", asus_info->oem_revision); 544 len += sprintf(page + len, "OEM revision : 0x%s\n", buf); 545 snprintf(buf, 5, "%s", asus_info->asl_compiler_id); 546 len += sprintf(page + len, "ASL comp vendor id : %s\n", buf); 547 snprintf(buf, 16, "%x", asus_info->asl_compiler_revision); 548 len += sprintf(page + len, "ASL comp revision : 0x%s\n", buf); 549 } 550 551 return len; 552 } 553 554 static int parse_arg(const char *buf, unsigned long count, int *val) 555 { 556 if (!count) 557 return 0; 558 if (count > 31) 559 return -EINVAL; 560 if (sscanf(buf, "%i", val) != 1) 561 return -EINVAL; 562 return count; 563 } 564 565 static ssize_t store_status(const char *buf, size_t count, 566 acpi_handle handle, int mask) 567 { 568 int rv, value; 569 int out = 0; 570 571 rv = parse_arg(buf, count, &value); 572 if (rv > 0) 573 out = value ? 1 : 0; 574 575 write_status(handle, out, mask); 576 577 return rv; 578 } 579 580 /* 581 * LEDD display 582 */ 583 static ssize_t show_ledd(struct device *dev, 584 struct device_attribute *attr, char *buf) 585 { 586 return sprintf(buf, "0x%08x\n", hotk->ledd_status); 587 } 588 589 static ssize_t store_ledd(struct device *dev, struct device_attribute *attr, 590 const char *buf, size_t count) 591 { 592 int rv, value; 593 594 rv = parse_arg(buf, count, &value); 595 if (rv > 0) { 596 if (write_acpi_int(ledd_set_handle, NULL, value, NULL)) 597 pr_warning("LED display write failed\n"); 598 else 599 hotk->ledd_status = (u32) value; 600 } 601 return rv; 602 } 603 604 /* 605 * WLAN 606 */ 607 static ssize_t show_wlan(struct device *dev, 608 struct device_attribute *attr, char *buf) 609 { 610 return sprintf(buf, "%d\n", read_status(WL_ON)); 611 } 612 613 static ssize_t store_wlan(struct device *dev, struct device_attribute *attr, 614 const char *buf, size_t count) 615 { 616 return store_status(buf, count, wl_switch_handle, WL_ON); 617 } 618 619 /* 620 * Bluetooth 621 */ 622 static ssize_t show_bluetooth(struct device *dev, 623 struct device_attribute *attr, char *buf) 624 { 625 return sprintf(buf, "%d\n", read_status(BT_ON)); 626 } 627 628 static ssize_t store_bluetooth(struct device *dev, 629 struct device_attribute *attr, const char *buf, 630 size_t count) 631 { 632 return store_status(buf, count, bt_switch_handle, BT_ON); 633 } 634 635 /* 636 * Display 637 */ 638 static void set_display(int value) 639 { 640 /* no sanity check needed for now */ 641 if (write_acpi_int(display_set_handle, NULL, value, NULL)) 642 pr_warning("Error setting display\n"); 643 return; 644 } 645 646 static int read_display(void) 647 { 648 unsigned long long value = 0; 649 acpi_status rv = AE_OK; 650 651 /* In most of the case, we know how to set the display, but sometime 652 we can't read it */ 653 if (display_get_handle) { 654 rv = acpi_evaluate_integer(display_get_handle, NULL, 655 NULL, &value); 656 if (ACPI_FAILURE(rv)) 657 pr_warning("Error reading display status\n"); 658 } 659 660 value &= 0x0F; /* needed for some models, shouldn't hurt others */ 661 662 return value; 663 } 664 665 /* 666 * Now, *this* one could be more user-friendly, but so far, no-one has 667 * complained. The significance of bits is the same as in store_disp() 668 */ 669 static ssize_t show_disp(struct device *dev, 670 struct device_attribute *attr, char *buf) 671 { 672 return sprintf(buf, "%d\n", read_display()); 673 } 674 675 /* 676 * Experimental support for display switching. As of now: 1 should activate 677 * the LCD output, 2 should do for CRT, 4 for TV-Out and 8 for DVI. 678 * Any combination (bitwise) of these will suffice. I never actually tested 4 679 * displays hooked up simultaneously, so be warned. See the acpi4asus README 680 * for more info. 681 */ 682 static ssize_t store_disp(struct device *dev, struct device_attribute *attr, 683 const char *buf, size_t count) 684 { 685 int rv, value; 686 687 rv = parse_arg(buf, count, &value); 688 if (rv > 0) 689 set_display(value); 690 return rv; 691 } 692 693 /* 694 * Light Sens 695 */ 696 static void set_light_sens_switch(int value) 697 { 698 if (write_acpi_int(ls_switch_handle, NULL, value, NULL)) 699 pr_warning("Error setting light sensor switch\n"); 700 hotk->light_switch = value; 701 } 702 703 static ssize_t show_lssw(struct device *dev, 704 struct device_attribute *attr, char *buf) 705 { 706 return sprintf(buf, "%d\n", hotk->light_switch); 707 } 708 709 static ssize_t store_lssw(struct device *dev, struct device_attribute *attr, 710 const char *buf, size_t count) 711 { 712 int rv, value; 713 714 rv = parse_arg(buf, count, &value); 715 if (rv > 0) 716 set_light_sens_switch(value ? 1 : 0); 717 718 return rv; 719 } 720 721 static void set_light_sens_level(int value) 722 { 723 if (write_acpi_int(ls_level_handle, NULL, value, NULL)) 724 pr_warning("Error setting light sensor level\n"); 725 hotk->light_level = value; 726 } 727 728 static ssize_t show_lslvl(struct device *dev, 729 struct device_attribute *attr, char *buf) 730 { 731 return sprintf(buf, "%d\n", hotk->light_level); 732 } 733 734 static ssize_t store_lslvl(struct device *dev, struct device_attribute *attr, 735 const char *buf, size_t count) 736 { 737 int rv, value; 738 739 rv = parse_arg(buf, count, &value); 740 if (rv > 0) { 741 value = (0 < value) ? ((15 < value) ? 15 : value) : 0; 742 /* 0 <= value <= 15 */ 743 set_light_sens_level(value); 744 } 745 746 return rv; 747 } 748 749 /* 750 * GPS 751 */ 752 static ssize_t show_gps(struct device *dev, 753 struct device_attribute *attr, char *buf) 754 { 755 return sprintf(buf, "%d\n", read_status(GPS_ON)); 756 } 757 758 static ssize_t store_gps(struct device *dev, struct device_attribute *attr, 759 const char *buf, size_t count) 760 { 761 return store_status(buf, count, NULL, GPS_ON); 762 } 763 764 /* 765 * Hotkey functions 766 */ 767 static struct key_entry *asus_get_entry_by_scancode(int code) 768 { 769 struct key_entry *key; 770 771 for (key = asus_keymap; key->type != KE_END; key++) 772 if (code == key->code) 773 return key; 774 775 return NULL; 776 } 777 778 static struct key_entry *asus_get_entry_by_keycode(int code) 779 { 780 struct key_entry *key; 781 782 for (key = asus_keymap; key->type != KE_END; key++) 783 if (code == key->keycode && key->type == KE_KEY) 784 return key; 785 786 return NULL; 787 } 788 789 static int asus_getkeycode(struct input_dev *dev, int scancode, int *keycode) 790 { 791 struct key_entry *key = asus_get_entry_by_scancode(scancode); 792 793 if (key && key->type == KE_KEY) { 794 *keycode = key->keycode; 795 return 0; 796 } 797 798 return -EINVAL; 799 } 800 801 static int asus_setkeycode(struct input_dev *dev, int scancode, int keycode) 802 { 803 struct key_entry *key; 804 int old_keycode; 805 806 if (keycode < 0 || keycode > KEY_MAX) 807 return -EINVAL; 808 809 key = asus_get_entry_by_scancode(scancode); 810 if (key && key->type == KE_KEY) { 811 old_keycode = key->keycode; 812 key->keycode = keycode; 813 set_bit(keycode, dev->keybit); 814 if (!asus_get_entry_by_keycode(old_keycode)) 815 clear_bit(old_keycode, dev->keybit); 816 return 0; 817 } 818 819 return -EINVAL; 820 } 821 822 static void asus_hotk_notify(struct acpi_device *device, u32 event) 823 { 824 static struct key_entry *key; 825 u16 count; 826 827 /* TODO Find a better way to handle events count. */ 828 if (!hotk) 829 return; 830 831 /* 832 * We need to tell the backlight device when the backlight power is 833 * switched 834 */ 835 if (event == ATKD_LCD_ON) { 836 write_status(NULL, 1, LCD_ON); 837 lcd_blank(FB_BLANK_UNBLANK); 838 } else if (event == ATKD_LCD_OFF) { 839 write_status(NULL, 0, LCD_ON); 840 lcd_blank(FB_BLANK_POWERDOWN); 841 } 842 843 count = hotk->event_count[event % 128]++; 844 acpi_bus_generate_proc_event(hotk->device, event, count); 845 acpi_bus_generate_netlink_event(hotk->device->pnp.device_class, 846 dev_name(&hotk->device->dev), event, 847 count); 848 849 if (hotk->inputdev) { 850 key = asus_get_entry_by_scancode(event); 851 if (!key) 852 return ; 853 854 switch (key->type) { 855 case KE_KEY: 856 input_report_key(hotk->inputdev, key->keycode, 1); 857 input_sync(hotk->inputdev); 858 input_report_key(hotk->inputdev, key->keycode, 0); 859 input_sync(hotk->inputdev); 860 break; 861 } 862 } 863 } 864 865 #define ASUS_CREATE_DEVICE_ATTR(_name) \ 866 struct device_attribute dev_attr_##_name = { \ 867 .attr = { \ 868 .name = __stringify(_name), \ 869 .mode = 0 }, \ 870 .show = NULL, \ 871 .store = NULL, \ 872 } 873 874 #define ASUS_SET_DEVICE_ATTR(_name, _mode, _show, _store) \ 875 do { \ 876 dev_attr_##_name.attr.mode = _mode; \ 877 dev_attr_##_name.show = _show; \ 878 dev_attr_##_name.store = _store; \ 879 } while(0) 880 881 static ASUS_CREATE_DEVICE_ATTR(infos); 882 static ASUS_CREATE_DEVICE_ATTR(wlan); 883 static ASUS_CREATE_DEVICE_ATTR(bluetooth); 884 static ASUS_CREATE_DEVICE_ATTR(display); 885 static ASUS_CREATE_DEVICE_ATTR(ledd); 886 static ASUS_CREATE_DEVICE_ATTR(ls_switch); 887 static ASUS_CREATE_DEVICE_ATTR(ls_level); 888 static ASUS_CREATE_DEVICE_ATTR(gps); 889 890 static struct attribute *asuspf_attributes[] = { 891 &dev_attr_infos.attr, 892 &dev_attr_wlan.attr, 893 &dev_attr_bluetooth.attr, 894 &dev_attr_display.attr, 895 &dev_attr_ledd.attr, 896 &dev_attr_ls_switch.attr, 897 &dev_attr_ls_level.attr, 898 &dev_attr_gps.attr, 899 NULL 900 }; 901 902 static struct attribute_group asuspf_attribute_group = { 903 .attrs = asuspf_attributes 904 }; 905 906 static struct platform_driver asuspf_driver = { 907 .driver = { 908 .name = ASUS_HOTK_FILE, 909 .owner = THIS_MODULE, 910 } 911 }; 912 913 static struct platform_device *asuspf_device; 914 915 static void asus_hotk_add_fs(void) 916 { 917 ASUS_SET_DEVICE_ATTR(infos, 0444, show_infos, NULL); 918 919 if (wl_switch_handle) 920 ASUS_SET_DEVICE_ATTR(wlan, 0644, show_wlan, store_wlan); 921 922 if (bt_switch_handle) 923 ASUS_SET_DEVICE_ATTR(bluetooth, 0644, 924 show_bluetooth, store_bluetooth); 925 926 if (display_set_handle && display_get_handle) 927 ASUS_SET_DEVICE_ATTR(display, 0644, show_disp, store_disp); 928 else if (display_set_handle) 929 ASUS_SET_DEVICE_ATTR(display, 0200, NULL, store_disp); 930 931 if (ledd_set_handle) 932 ASUS_SET_DEVICE_ATTR(ledd, 0644, show_ledd, store_ledd); 933 934 if (ls_switch_handle && ls_level_handle) { 935 ASUS_SET_DEVICE_ATTR(ls_level, 0644, show_lslvl, store_lslvl); 936 ASUS_SET_DEVICE_ATTR(ls_switch, 0644, show_lssw, store_lssw); 937 } 938 939 if (gps_status_handle && gps_on_handle && gps_off_handle) 940 ASUS_SET_DEVICE_ATTR(gps, 0644, show_gps, store_gps); 941 } 942 943 static int asus_handle_init(char *name, acpi_handle * handle, 944 char **paths, int num_paths) 945 { 946 int i; 947 acpi_status status; 948 949 for (i = 0; i < num_paths; i++) { 950 status = acpi_get_handle(NULL, paths[i], handle); 951 if (ACPI_SUCCESS(status)) 952 return 0; 953 } 954 955 *handle = NULL; 956 return -ENODEV; 957 } 958 959 #define ASUS_HANDLE_INIT(object) \ 960 asus_handle_init(#object, &object##_handle, object##_paths, \ 961 ARRAY_SIZE(object##_paths)) 962 963 /* 964 * This function is used to initialize the hotk with right values. In this 965 * method, we can make all the detection we want, and modify the hotk struct 966 */ 967 static int asus_hotk_get_info(void) 968 { 969 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; 970 union acpi_object *model = NULL; 971 unsigned long long bsts_result, hwrs_result; 972 char *string = NULL; 973 acpi_status status; 974 975 /* 976 * Get DSDT headers early enough to allow for differentiating between 977 * models, but late enough to allow acpi_bus_register_driver() to fail 978 * before doing anything ACPI-specific. Should we encounter a machine, 979 * which needs special handling (i.e. its hotkey device has a different 980 * HID), this bit will be moved. A global variable asus_info contains 981 * the DSDT header. 982 */ 983 status = acpi_get_table(ACPI_SIG_DSDT, 1, &asus_info); 984 if (ACPI_FAILURE(status)) 985 pr_warning("Couldn't get the DSDT table header\n"); 986 987 /* We have to write 0 on init this far for all ASUS models */ 988 if (write_acpi_int(hotk->handle, "INIT", 0, &buffer)) { 989 pr_err("Hotkey initialization failed\n"); 990 return -ENODEV; 991 } 992 993 /* This needs to be called for some laptops to init properly */ 994 status = 995 acpi_evaluate_integer(hotk->handle, "BSTS", NULL, &bsts_result); 996 if (ACPI_FAILURE(status)) 997 pr_warning("Error calling BSTS\n"); 998 else if (bsts_result) 999 pr_notice("BSTS called, 0x%02x returned\n", 1000 (uint) bsts_result); 1001 1002 /* This too ... */ 1003 write_acpi_int(hotk->handle, "CWAP", wapf, NULL); 1004 1005 /* 1006 * Try to match the object returned by INIT to the specific model. 1007 * Handle every possible object (or the lack of thereof) the DSDT 1008 * writers might throw at us. When in trouble, we pass NULL to 1009 * asus_model_match() and try something completely different. 1010 */ 1011 if (buffer.pointer) { 1012 model = buffer.pointer; 1013 switch (model->type) { 1014 case ACPI_TYPE_STRING: 1015 string = model->string.pointer; 1016 break; 1017 case ACPI_TYPE_BUFFER: 1018 string = model->buffer.pointer; 1019 break; 1020 default: 1021 string = ""; 1022 break; 1023 } 1024 } 1025 hotk->name = kstrdup(string, GFP_KERNEL); 1026 if (!hotk->name) 1027 return -ENOMEM; 1028 1029 if (*string) 1030 pr_notice(" %s model detected\n", string); 1031 1032 ASUS_HANDLE_INIT(mled_set); 1033 ASUS_HANDLE_INIT(tled_set); 1034 ASUS_HANDLE_INIT(rled_set); 1035 ASUS_HANDLE_INIT(pled_set); 1036 ASUS_HANDLE_INIT(gled_set); 1037 1038 ASUS_HANDLE_INIT(ledd_set); 1039 1040 /* 1041 * The HWRS method return informations about the hardware. 1042 * 0x80 bit is for WLAN, 0x100 for Bluetooth. 1043 * The significance of others is yet to be found. 1044 * If we don't find the method, we assume the device are present. 1045 */ 1046 status = 1047 acpi_evaluate_integer(hotk->handle, "HRWS", NULL, &hwrs_result); 1048 if (ACPI_FAILURE(status)) 1049 hwrs_result = WL_HWRS | BT_HWRS; 1050 1051 if (hwrs_result & WL_HWRS) 1052 ASUS_HANDLE_INIT(wl_switch); 1053 if (hwrs_result & BT_HWRS) 1054 ASUS_HANDLE_INIT(bt_switch); 1055 1056 ASUS_HANDLE_INIT(wireless_status); 1057 1058 ASUS_HANDLE_INIT(brightness_set); 1059 ASUS_HANDLE_INIT(brightness_get); 1060 1061 ASUS_HANDLE_INIT(lcd_switch); 1062 1063 ASUS_HANDLE_INIT(display_set); 1064 ASUS_HANDLE_INIT(display_get); 1065 1066 /* There is a lot of models with "ALSL", but a few get 1067 a real light sens, so we need to check it. */ 1068 if (!ASUS_HANDLE_INIT(ls_switch)) 1069 ASUS_HANDLE_INIT(ls_level); 1070 1071 ASUS_HANDLE_INIT(gps_on); 1072 ASUS_HANDLE_INIT(gps_off); 1073 ASUS_HANDLE_INIT(gps_status); 1074 1075 kfree(model); 1076 1077 return AE_OK; 1078 } 1079 1080 static int asus_input_init(void) 1081 { 1082 const struct key_entry *key; 1083 int result; 1084 1085 hotk->inputdev = input_allocate_device(); 1086 if (!hotk->inputdev) { 1087 pr_info("Unable to allocate input device\n"); 1088 return 0; 1089 } 1090 hotk->inputdev->name = "Asus Laptop extra buttons"; 1091 hotk->inputdev->phys = ASUS_HOTK_FILE "/input0"; 1092 hotk->inputdev->id.bustype = BUS_HOST; 1093 hotk->inputdev->getkeycode = asus_getkeycode; 1094 hotk->inputdev->setkeycode = asus_setkeycode; 1095 1096 for (key = asus_keymap; key->type != KE_END; key++) { 1097 switch (key->type) { 1098 case KE_KEY: 1099 set_bit(EV_KEY, hotk->inputdev->evbit); 1100 set_bit(key->keycode, hotk->inputdev->keybit); 1101 break; 1102 } 1103 } 1104 result = input_register_device(hotk->inputdev); 1105 if (result) { 1106 pr_info("Unable to register input device\n"); 1107 input_free_device(hotk->inputdev); 1108 } 1109 return result; 1110 } 1111 1112 static int asus_hotk_check(void) 1113 { 1114 int result = 0; 1115 1116 result = acpi_bus_get_status(hotk->device); 1117 if (result) 1118 return result; 1119 1120 if (hotk->device->status.present) { 1121 result = asus_hotk_get_info(); 1122 } else { 1123 pr_err("Hotkey device not present, aborting\n"); 1124 return -EINVAL; 1125 } 1126 1127 return result; 1128 } 1129 1130 static int asus_hotk_found; 1131 1132 static int asus_hotk_add(struct acpi_device *device) 1133 { 1134 int result; 1135 1136 if (!device) 1137 return -EINVAL; 1138 1139 pr_notice("Asus Laptop Support version %s\n", 1140 ASUS_LAPTOP_VERSION); 1141 1142 hotk = kzalloc(sizeof(struct asus_hotk), GFP_KERNEL); 1143 if (!hotk) 1144 return -ENOMEM; 1145 1146 hotk->handle = device->handle; 1147 strcpy(acpi_device_name(device), ASUS_HOTK_DEVICE_NAME); 1148 strcpy(acpi_device_class(device), ASUS_HOTK_CLASS); 1149 device->driver_data = hotk; 1150 hotk->device = device; 1151 1152 result = asus_hotk_check(); 1153 if (result) 1154 goto end; 1155 1156 asus_hotk_add_fs(); 1157 1158 asus_hotk_found = 1; 1159 1160 /* WLED and BLED are on by default */ 1161 write_status(bt_switch_handle, 1, BT_ON); 1162 write_status(wl_switch_handle, 1, WL_ON); 1163 1164 /* If the h/w switch is off, we need to check the real status */ 1165 write_status(NULL, read_status(BT_ON), BT_ON); 1166 write_status(NULL, read_status(WL_ON), WL_ON); 1167 1168 /* LCD Backlight is on by default */ 1169 write_status(NULL, 1, LCD_ON); 1170 1171 /* LED display is off by default */ 1172 hotk->ledd_status = 0xFFF; 1173 1174 /* Set initial values of light sensor and level */ 1175 hotk->light_switch = 1; /* Default to light sensor disabled */ 1176 hotk->light_level = 0; /* level 5 for sensor sensitivity */ 1177 1178 if (ls_switch_handle) 1179 set_light_sens_switch(hotk->light_switch); 1180 1181 if (ls_level_handle) 1182 set_light_sens_level(hotk->light_level); 1183 1184 /* GPS is on by default */ 1185 write_status(NULL, 1, GPS_ON); 1186 1187 end: 1188 if (result) { 1189 kfree(hotk->name); 1190 kfree(hotk); 1191 } 1192 1193 return result; 1194 } 1195 1196 static int asus_hotk_remove(struct acpi_device *device, int type) 1197 { 1198 if (!device || !acpi_driver_data(device)) 1199 return -EINVAL; 1200 1201 kfree(hotk->name); 1202 kfree(hotk); 1203 1204 return 0; 1205 } 1206 1207 static void asus_backlight_exit(void) 1208 { 1209 if (asus_backlight_device) 1210 backlight_device_unregister(asus_backlight_device); 1211 } 1212 1213 #define ASUS_LED_UNREGISTER(object) \ 1214 if (object##_led.dev) \ 1215 led_classdev_unregister(&object##_led) 1216 1217 static void asus_led_exit(void) 1218 { 1219 destroy_workqueue(led_workqueue); 1220 ASUS_LED_UNREGISTER(mled); 1221 ASUS_LED_UNREGISTER(tled); 1222 ASUS_LED_UNREGISTER(pled); 1223 ASUS_LED_UNREGISTER(rled); 1224 ASUS_LED_UNREGISTER(gled); 1225 } 1226 1227 static void asus_input_exit(void) 1228 { 1229 if (hotk->inputdev) 1230 input_unregister_device(hotk->inputdev); 1231 } 1232 1233 static void __exit asus_laptop_exit(void) 1234 { 1235 asus_backlight_exit(); 1236 asus_led_exit(); 1237 asus_input_exit(); 1238 1239 acpi_bus_unregister_driver(&asus_hotk_driver); 1240 sysfs_remove_group(&asuspf_device->dev.kobj, &asuspf_attribute_group); 1241 platform_device_unregister(asuspf_device); 1242 platform_driver_unregister(&asuspf_driver); 1243 } 1244 1245 static int asus_backlight_init(struct device *dev) 1246 { 1247 struct backlight_device *bd; 1248 1249 if (brightness_set_handle && lcd_switch_handle) { 1250 bd = backlight_device_register(ASUS_HOTK_FILE, dev, 1251 NULL, &asusbl_ops); 1252 if (IS_ERR(bd)) { 1253 pr_err("Could not register asus backlight device\n"); 1254 asus_backlight_device = NULL; 1255 return PTR_ERR(bd); 1256 } 1257 1258 asus_backlight_device = bd; 1259 1260 bd->props.max_brightness = 15; 1261 bd->props.brightness = read_brightness(NULL); 1262 bd->props.power = FB_BLANK_UNBLANK; 1263 backlight_update_status(bd); 1264 } 1265 return 0; 1266 } 1267 1268 static int asus_led_register(acpi_handle handle, 1269 struct led_classdev *ldev, struct device *dev) 1270 { 1271 if (!handle) 1272 return 0; 1273 1274 return led_classdev_register(dev, ldev); 1275 } 1276 1277 #define ASUS_LED_REGISTER(object, device) \ 1278 asus_led_register(object##_set_handle, &object##_led, device) 1279 1280 static int asus_led_init(struct device *dev) 1281 { 1282 int rv; 1283 1284 rv = ASUS_LED_REGISTER(mled, dev); 1285 if (rv) 1286 goto out; 1287 1288 rv = ASUS_LED_REGISTER(tled, dev); 1289 if (rv) 1290 goto out1; 1291 1292 rv = ASUS_LED_REGISTER(rled, dev); 1293 if (rv) 1294 goto out2; 1295 1296 rv = ASUS_LED_REGISTER(pled, dev); 1297 if (rv) 1298 goto out3; 1299 1300 rv = ASUS_LED_REGISTER(gled, dev); 1301 if (rv) 1302 goto out4; 1303 1304 led_workqueue = create_singlethread_workqueue("led_workqueue"); 1305 if (!led_workqueue) 1306 goto out5; 1307 1308 return 0; 1309 out5: 1310 rv = -ENOMEM; 1311 ASUS_LED_UNREGISTER(gled); 1312 out4: 1313 ASUS_LED_UNREGISTER(pled); 1314 out3: 1315 ASUS_LED_UNREGISTER(rled); 1316 out2: 1317 ASUS_LED_UNREGISTER(tled); 1318 out1: 1319 ASUS_LED_UNREGISTER(mled); 1320 out: 1321 return rv; 1322 } 1323 1324 static int __init asus_laptop_init(void) 1325 { 1326 int result; 1327 1328 if (acpi_disabled) 1329 return -ENODEV; 1330 1331 result = acpi_bus_register_driver(&asus_hotk_driver); 1332 if (result < 0) 1333 return result; 1334 1335 /* 1336 * This is a bit of a kludge. We only want this module loaded 1337 * for ASUS systems, but there's currently no way to probe the 1338 * ACPI namespace for ASUS HIDs. So we just return failure if 1339 * we didn't find one, which will cause the module to be 1340 * unloaded. 1341 */ 1342 if (!asus_hotk_found) { 1343 acpi_bus_unregister_driver(&asus_hotk_driver); 1344 return -ENODEV; 1345 } 1346 1347 result = asus_input_init(); 1348 if (result) 1349 goto fail_input; 1350 1351 /* Register platform stuff */ 1352 result = platform_driver_register(&asuspf_driver); 1353 if (result) 1354 goto fail_platform_driver; 1355 1356 asuspf_device = platform_device_alloc(ASUS_HOTK_FILE, -1); 1357 if (!asuspf_device) { 1358 result = -ENOMEM; 1359 goto fail_platform_device1; 1360 } 1361 1362 result = platform_device_add(asuspf_device); 1363 if (result) 1364 goto fail_platform_device2; 1365 1366 result = sysfs_create_group(&asuspf_device->dev.kobj, 1367 &asuspf_attribute_group); 1368 if (result) 1369 goto fail_sysfs; 1370 1371 result = asus_led_init(&asuspf_device->dev); 1372 if (result) 1373 goto fail_led; 1374 1375 if (!acpi_video_backlight_support()) { 1376 result = asus_backlight_init(&asuspf_device->dev); 1377 if (result) 1378 goto fail_backlight; 1379 } else 1380 pr_info("Brightness ignored, must be controlled by " 1381 "ACPI video driver\n"); 1382 1383 return 0; 1384 1385 fail_backlight: 1386 asus_led_exit(); 1387 1388 fail_led: 1389 sysfs_remove_group(&asuspf_device->dev.kobj, 1390 &asuspf_attribute_group); 1391 1392 fail_sysfs: 1393 platform_device_del(asuspf_device); 1394 1395 fail_platform_device2: 1396 platform_device_put(asuspf_device); 1397 1398 fail_platform_device1: 1399 platform_driver_unregister(&asuspf_driver); 1400 1401 fail_platform_driver: 1402 asus_input_exit(); 1403 1404 fail_input: 1405 1406 return result; 1407 } 1408 1409 module_init(asus_laptop_init); 1410 module_exit(asus_laptop_exit); 1411