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#include <linux/autoconf.h> 37#include <linux/kernel.h> 38#include <linux/module.h> 39#include <linux/init.h> 40#include <linux/types.h> 41#include <linux/err.h> 42#include <linux/proc_fs.h> 43#include <linux/backlight.h> 44#include <linux/fb.h> 45#include <linux/leds.h> 46#include <linux/platform_device.h> 47#include <acpi/acpi_drivers.h> 48#include <acpi/acpi_bus.h> 49#include <asm/uaccess.h> 50 51#define ASUS_LAPTOP_VERSION "0.42" 52 53#define ASUS_HOTK_NAME "Asus Laptop Support" 54#define ASUS_HOTK_CLASS "hotkey" 55#define ASUS_HOTK_DEVICE_NAME "Hotkey" 56#define ASUS_HOTK_HID "ATK0100" 57#define ASUS_HOTK_FILE "asus-laptop" 58#define ASUS_HOTK_PREFIX "\\_SB.ATKD." 59 60/* 61 * Some events we use, same for all Asus 62 */ 63#define ATKD_BR_UP 0x10 64#define ATKD_BR_DOWN 0x20 65#define ATKD_LCD_ON 0x33 66#define ATKD_LCD_OFF 0x34 67 68/* 69 * Known bits returned by \_SB.ATKD.HWRS 70 */ 71#define WL_HWRS 0x80 72#define BT_HWRS 0x100 73 74/* 75 * Flags for hotk status 76 * WL_ON and BT_ON are also used for wireless_status() 77 */ 78#define WL_ON 0x01 //internal Wifi 79#define BT_ON 0x02 //internal Bluetooth 80#define MLED_ON 0x04 //mail LED 81#define TLED_ON 0x08 //touchpad LED 82#define RLED_ON 0x10 //Record LED 83#define PLED_ON 0x20 //Phone LED 84#define GLED_ON 0x40 //Gaming LED 85#define LCD_ON 0x80 //LCD backlight 86#define GPS_ON 0x100 //GPS 87 88#define ASUS_LOG ASUS_HOTK_FILE ": " 89#define ASUS_ERR KERN_ERR ASUS_LOG 90#define ASUS_WARNING KERN_WARNING ASUS_LOG 91#define ASUS_NOTICE KERN_NOTICE ASUS_LOG 92#define ASUS_INFO KERN_INFO ASUS_LOG 93#define ASUS_DEBUG KERN_DEBUG ASUS_LOG 94 95MODULE_AUTHOR("Julien Lerouge, Karol Kozimor, Corentin Chary"); 96MODULE_DESCRIPTION(ASUS_HOTK_NAME); 97MODULE_LICENSE("GPL"); 98 99/* WAPF defines the behavior of the Fn+Fx wlan key 100 * The significance of values is yet to be found, but 101 * most of the time: 102 * 0x0 will do nothing 103 * 0x1 will allow to control the device with Fn+Fx key. 104 * 0x4 will send an ACPI event (0x88) while pressing the Fn+Fx key 105 * 0x5 like 0x1 or 0x4 106 * So, if something doesn't work as you want, just try other values =) 107 */ 108static uint wapf = 1; 109module_param(wapf, uint, 0644); 110MODULE_PARM_DESC(wapf, "WAPF value"); 111 112#define ASUS_HANDLE(object, paths...) \ 113 static acpi_handle object##_handle = NULL; \ 114 static char *object##_paths[] = { paths } 115 116/* LED */ 117ASUS_HANDLE(mled_set, ASUS_HOTK_PREFIX "MLED"); 118ASUS_HANDLE(tled_set, ASUS_HOTK_PREFIX "TLED"); 119ASUS_HANDLE(rled_set, ASUS_HOTK_PREFIX "RLED"); /* W1JC */ 120ASUS_HANDLE(pled_set, ASUS_HOTK_PREFIX "PLED"); /* A7J */ 121ASUS_HANDLE(gled_set, ASUS_HOTK_PREFIX "GLED"); /* G1, G2 (probably) */ 122 123/* LEDD */ 124ASUS_HANDLE(ledd_set, ASUS_HOTK_PREFIX "SLCM"); 125 126/* Bluetooth and WLAN 127 * WLED and BLED are not handled like other XLED, because in some dsdt 128 * they also control the WLAN/Bluetooth device. 129 */ 130ASUS_HANDLE(wl_switch, ASUS_HOTK_PREFIX "WLED"); 131ASUS_HANDLE(bt_switch, ASUS_HOTK_PREFIX "BLED"); 132ASUS_HANDLE(wireless_status, ASUS_HOTK_PREFIX "RSTS"); /* All new models */ 133 134/* Brightness */ 135ASUS_HANDLE(brightness_set, ASUS_HOTK_PREFIX "SPLV"); 136ASUS_HANDLE(brightness_get, ASUS_HOTK_PREFIX "GPLV"); 137 138/* Backlight */ 139ASUS_HANDLE(lcd_switch, "\\_SB.PCI0.SBRG.EC0._Q10", /* All new models */ 140 "\\_SB.PCI0.ISA.EC0._Q10", /* A1x */ 141 "\\_SB.PCI0.PX40.ECD0._Q10", /* L3C */ 142 "\\_SB.PCI0.PX40.EC0.Q10", /* M1A */ 143 "\\_SB.PCI0.LPCB.EC0._Q10", /* P30 */ 144 "\\_SB.PCI0.PX40.Q10", /* S1x */ 145 "\\Q10"); /* A2x, L2D, L3D, M2E */ 146 147/* Display */ 148ASUS_HANDLE(display_set, ASUS_HOTK_PREFIX "SDSP"); 149ASUS_HANDLE(display_get, "\\_SB.PCI0.P0P1.VGA.GETD", /* A6B, A6K A6R A7D F3JM L4R M6R A3G 150 M6A M6V VX-1 V6J V6V W3Z */ 151 "\\_SB.PCI0.P0P2.VGA.GETD", /* A3E A4K, A4D A4L A6J A7J A8J Z71V M9V 152 S5A M5A z33A W1Jc W2V G1 */ 153 "\\_SB.PCI0.P0P3.VGA.GETD", /* A6V A6Q */ 154 "\\_SB.PCI0.P0PA.VGA.GETD", /* A6T, A6M */ 155 "\\_SB.PCI0.PCI1.VGAC.NMAP", /* L3C */ 156 "\\_SB.PCI0.VGA.GETD", /* Z96F */ 157 "\\ACTD", /* A2D */ 158 "\\ADVG", /* A4G Z71A W1N W5A W5F M2N M3N M5N M6N S1N S5N */ 159 "\\DNXT", /* P30 */ 160 "\\INFB", /* A2H D1 L2D L3D L3H L2E L5D L5C M1A M2E L4L W3V */ 161 "\\SSTE"); /* A3F A6F A3N A3L M6N W3N W6A */ 162 163ASUS_HANDLE(ls_switch, ASUS_HOTK_PREFIX "ALSC"); /* Z71A Z71V */ 164ASUS_HANDLE(ls_level, ASUS_HOTK_PREFIX "ALSL"); /* Z71A Z71V */ 165 166/* GPS */ 167/* R2H use different handle for GPS on/off */ 168ASUS_HANDLE(gps_on, ASUS_HOTK_PREFIX "SDON"); /* R2H */ 169ASUS_HANDLE(gps_off, ASUS_HOTK_PREFIX "SDOF"); /* R2H */ 170ASUS_HANDLE(gps_status, ASUS_HOTK_PREFIX "GPST"); 171 172/* 173 * This is the main structure, we can use it to store anything interesting 174 * about the hotk device 175 */ 176struct asus_hotk { 177 char *name; //laptop name 178 struct acpi_device *device; //the device we are in 179 acpi_handle handle; //the handle of the hotk device 180 char status; //status of the hotk, for LEDs, ... 181 u32 ledd_status; //status of the LED display 182 u8 light_level; //light sensor level 183 u8 light_switch; //light sensor switch value 184 u16 event_count[128]; //count for each event TODO make this better 185}; 186 187/* 188 * This header is made available to allow proper configuration given model, 189 * revision number , ... this info cannot go in struct asus_hotk because it is 190 * available before the hotk 191 */ 192static struct acpi_table_header *asus_info; 193 194/* The actual device the driver binds to */ 195static struct asus_hotk *hotk; 196 197/* 198 * The hotkey driver declaration 199 */ 200static int asus_hotk_add(struct acpi_device *device); 201static int asus_hotk_remove(struct acpi_device *device, int type); 202static struct acpi_driver asus_hotk_driver = { 203 .name = ASUS_HOTK_NAME, 204 .class = ASUS_HOTK_CLASS, 205 .ids = ASUS_HOTK_HID, 206 .ops = { 207 .add = asus_hotk_add, 208 .remove = asus_hotk_remove, 209 }, 210}; 211 212/* The backlight device /sys/class/backlight */ 213static struct backlight_device *asus_backlight_device; 214 215/* 216 * The backlight class declaration 217 */ 218static int read_brightness(struct backlight_device *bd); 219static int update_bl_status(struct backlight_device *bd); 220static struct backlight_ops asusbl_ops = { 221 .get_brightness = read_brightness, 222 .update_status = update_bl_status, 223}; 224 225/* These functions actually update the LED's, and are called from a 226 * workqueue. By doing this as separate work rather than when the LED 227 * subsystem asks, we avoid messing with the Asus ACPI stuff during a 228 * potentially bad time, such as a timer interrupt. */ 229static struct workqueue_struct *led_workqueue; 230 231#define ASUS_LED(object, ledname) \ 232 static void object##_led_set(struct led_classdev *led_cdev, \ 233 enum led_brightness value); \ 234 static void object##_led_update(struct work_struct *ignored); \ 235 static int object##_led_wk; \ 236 static DECLARE_WORK(object##_led_work, object##_led_update); \ 237 static struct led_classdev object##_led = { \ 238 .name = "asus:" ledname, \ 239 .brightness_set = object##_led_set, \ 240 } 241 242ASUS_LED(mled, "mail"); 243ASUS_LED(tled, "touchpad"); 244ASUS_LED(rled, "record"); 245ASUS_LED(pled, "phone"); 246ASUS_LED(gled, "gaming"); 247 248/* 249 * This function evaluates an ACPI method, given an int as parameter, the 250 * method is searched within the scope of the handle, can be NULL. The output 251 * of the method is written is output, which can also be NULL 252 * 253 * returns 1 if write is successful, 0 else. 254 */ 255static int write_acpi_int(acpi_handle handle, const char *method, int val, 256 struct acpi_buffer *output) 257{ 258 struct acpi_object_list params; //list of input parameters (an int here) 259 union acpi_object in_obj; //the only param we use 260 acpi_status status; 261 262 params.count = 1; 263 params.pointer = &in_obj; 264 in_obj.type = ACPI_TYPE_INTEGER; 265 in_obj.integer.value = val; 266 267 status = acpi_evaluate_object(handle, (char *)method, ¶ms, output); 268 return (status == AE_OK); 269} 270 271static int read_wireless_status(int mask) 272{ 273 ulong status; 274 acpi_status rv = AE_OK; 275 276 if (!wireless_status_handle) 277 return (hotk->status & mask) ? 1 : 0; 278 279 rv = acpi_evaluate_integer(wireless_status_handle, NULL, NULL, &status); 280 if (ACPI_FAILURE(rv)) 281 printk(ASUS_WARNING "Error reading Wireless status\n"); 282 else 283 return (status & mask) ? 1 : 0; 284 285 return (hotk->status & mask) ? 1 : 0; 286} 287 288static int read_gps_status(void) 289{ 290 ulong status; 291 acpi_status rv = AE_OK; 292 293 rv = acpi_evaluate_integer(gps_status_handle, NULL, NULL, &status); 294 if (ACPI_FAILURE(rv)) 295 printk(ASUS_WARNING "Error reading GPS status\n"); 296 else 297 return status ? 1 : 0; 298 299 return (hotk->status & GPS_ON) ? 1 : 0; 300} 301 302/* Generic LED functions */ 303static int read_status(int mask) 304{ 305 /* There is a special method for both wireless devices */ 306 if (mask == BT_ON || mask == WL_ON) 307 return read_wireless_status(mask); 308 else if (mask == GPS_ON) 309 return read_gps_status(); 310 311 return (hotk->status & mask) ? 1 : 0; 312} 313 314static void write_status(acpi_handle handle, int out, int mask) 315{ 316 hotk->status = (out) ? (hotk->status | mask) : (hotk->status & ~mask); 317 318 switch (mask) { 319 case MLED_ON: 320 out = !out & 0x1; 321 break; 322 case GLED_ON: 323 out = (out & 0x1) + 1; 324 break; 325 case GPS_ON: 326 handle = (out) ? gps_on_handle : gps_off_handle; 327 out = 0x02; 328 break; 329 default: 330 out &= 0x1; 331 break; 332 } 333 334 if (handle && !write_acpi_int(handle, NULL, out, NULL)) 335 printk(ASUS_WARNING " write failed %x\n", mask); 336} 337 338/* /sys/class/led handlers */ 339#define ASUS_LED_HANDLER(object, mask) \ 340 static void object##_led_set(struct led_classdev *led_cdev, \ 341 enum led_brightness value) \ 342 { \ 343 object##_led_wk = value; \ 344 queue_work(led_workqueue, &object##_led_work); \ 345 } \ 346 static void object##_led_update(struct work_struct *ignored) \ 347 { \ 348 int value = object##_led_wk; \ 349 write_status(object##_set_handle, value, (mask)); \ 350 } 351 352ASUS_LED_HANDLER(mled, MLED_ON); 353ASUS_LED_HANDLER(pled, PLED_ON); 354ASUS_LED_HANDLER(rled, RLED_ON); 355ASUS_LED_HANDLER(tled, TLED_ON); 356ASUS_LED_HANDLER(gled, GLED_ON); 357 358static int get_lcd_state(void) 359{ 360 return read_status(LCD_ON); 361} 362 363static int set_lcd_state(int value) 364{ 365 int lcd = 0; 366 acpi_status status = 0; 367 368 lcd = value ? 1 : 0; 369 370 if (lcd == get_lcd_state()) 371 return 0; 372 373 if (lcd_switch_handle) { 374 status = acpi_evaluate_object(lcd_switch_handle, 375 NULL, NULL, NULL); 376 377 if (ACPI_FAILURE(status)) 378 printk(ASUS_WARNING "Error switching LCD\n"); 379 } 380 381 write_status(NULL, lcd, LCD_ON); 382 return 0; 383} 384 385static void lcd_blank(int blank) 386{ 387 struct backlight_device *bd = asus_backlight_device; 388 389 if (bd) { 390 bd->props.power = blank; 391 backlight_update_status(bd); 392 } 393} 394 395static int read_brightness(struct backlight_device *bd) 396{ 397 ulong value; 398 acpi_status rv = AE_OK; 399 400 rv = acpi_evaluate_integer(brightness_get_handle, NULL, NULL, &value); 401 if (ACPI_FAILURE(rv)) 402 printk(ASUS_WARNING "Error reading brightness\n"); 403 404 return value; 405} 406 407static int set_brightness(struct backlight_device *bd, int value) 408{ 409 int ret = 0; 410 411 value = (0 < value) ? ((15 < value) ? 15 : value) : 0; 412 /* 0 <= value <= 15 */ 413 414 if (!write_acpi_int(brightness_set_handle, NULL, value, NULL)) { 415 printk(ASUS_WARNING "Error changing brightness\n"); 416 ret = -EIO; 417 } 418 419 return ret; 420} 421 422static int update_bl_status(struct backlight_device *bd) 423{ 424 int rv; 425 int value = bd->props.brightness; 426 427 rv = set_brightness(bd, value); 428 if (rv) 429 return rv; 430 431 value = (bd->props.power == FB_BLANK_UNBLANK) ? 1 : 0; 432 return set_lcd_state(value); 433} 434 435/* 436 * Platform device handlers 437 */ 438 439/* 440 * We write our info in page, we begin at offset off and cannot write more 441 * than count bytes. We set eof to 1 if we handle those 2 values. We return the 442 * number of bytes written in page 443 */ 444static ssize_t show_infos(struct device *dev, 445 struct device_attribute *attr, char *page) 446{ 447 int len = 0; 448 ulong temp; 449 char buf[16]; //enough for all info 450 acpi_status rv = AE_OK; 451 452 /* 453 * We use the easy way, we don't care of off and count, so we don't set eof 454 * to 1 455 */ 456 457 len += sprintf(page, ASUS_HOTK_NAME " " ASUS_LAPTOP_VERSION "\n"); 458 len += sprintf(page + len, "Model reference : %s\n", hotk->name); 459 /* 460 * The SFUN method probably allows the original driver to get the list 461 * of features supported by a given model. For now, 0x0100 or 0x0800 462 * bit signifies that the laptop is equipped with a Wi-Fi MiniPCI card. 463 * The significance of others is yet to be found. 464 */ 465 rv = acpi_evaluate_integer(hotk->handle, "SFUN", NULL, &temp); 466 if (!ACPI_FAILURE(rv)) 467 len += sprintf(page + len, "SFUN value : 0x%04x\n", 468 (uint) temp); 469 /* 470 * Another value for userspace: the ASYM method returns 0x02 for 471 * battery low and 0x04 for battery critical, its readings tend to be 472 * more accurate than those provided by _BST. 473 * Note: since not all the laptops provide this method, errors are 474 * silently ignored. 475 */ 476 rv = acpi_evaluate_integer(hotk->handle, "ASYM", NULL, &temp); 477 if (!ACPI_FAILURE(rv)) 478 len += sprintf(page + len, "ASYM value : 0x%04x\n", 479 (uint) temp); 480 if (asus_info) { 481 snprintf(buf, 16, "%d", asus_info->length); 482 len += sprintf(page + len, "DSDT length : %s\n", buf); 483 snprintf(buf, 16, "%d", asus_info->checksum); 484 len += sprintf(page + len, "DSDT checksum : %s\n", buf); 485 snprintf(buf, 16, "%d", asus_info->revision); 486 len += sprintf(page + len, "DSDT revision : %s\n", buf); 487 snprintf(buf, 7, "%s", asus_info->oem_id); 488 len += sprintf(page + len, "OEM id : %s\n", buf); 489 snprintf(buf, 9, "%s", asus_info->oem_table_id); 490 len += sprintf(page + len, "OEM table id : %s\n", buf); 491 snprintf(buf, 16, "%x", asus_info->oem_revision); 492 len += sprintf(page + len, "OEM revision : 0x%s\n", buf); 493 snprintf(buf, 5, "%s", asus_info->asl_compiler_id); 494 len += sprintf(page + len, "ASL comp vendor id : %s\n", buf); 495 snprintf(buf, 16, "%x", asus_info->asl_compiler_revision); 496 len += sprintf(page + len, "ASL comp revision : 0x%s\n", buf); 497 } 498 499 return len; 500} 501 502static int parse_arg(const char *buf, unsigned long count, int *val) 503{ 504 if (!count) 505 return 0; 506 if (count > 31) 507 return -EINVAL; 508 if (sscanf(buf, "%i", val) != 1) 509 return -EINVAL; 510 return count; 511} 512 513static ssize_t store_status(const char *buf, size_t count, 514 acpi_handle handle, int mask) 515{ 516 int rv, value; 517 int out = 0; 518 519 rv = parse_arg(buf, count, &value); 520 if (rv > 0) 521 out = value ? 1 : 0; 522 523 write_status(handle, out, mask); 524 525 return rv; 526} 527 528/* 529 * LEDD display 530 */ 531static ssize_t show_ledd(struct device *dev, 532 struct device_attribute *attr, char *buf) 533{ 534 return sprintf(buf, "0x%08x\n", hotk->ledd_status); 535} 536 537static ssize_t store_ledd(struct device *dev, struct device_attribute *attr, 538 const char *buf, size_t count) 539{ 540 int rv, value; 541 542 rv = parse_arg(buf, count, &value); 543 if (rv > 0) { 544 if (!write_acpi_int(ledd_set_handle, NULL, value, NULL)) 545 printk(ASUS_WARNING "LED display write failed\n"); 546 else 547 hotk->ledd_status = (u32) value; 548 } 549 return rv; 550} 551 552/* 553 * WLAN 554 */ 555static ssize_t show_wlan(struct device *dev, 556 struct device_attribute *attr, char *buf) 557{ 558 return sprintf(buf, "%d\n", read_status(WL_ON)); 559} 560 561static ssize_t store_wlan(struct device *dev, struct device_attribute *attr, 562 const char *buf, size_t count) 563{ 564 return store_status(buf, count, wl_switch_handle, WL_ON); 565} 566 567/* 568 * Bluetooth 569 */ 570static ssize_t show_bluetooth(struct device *dev, 571 struct device_attribute *attr, char *buf) 572{ 573 return sprintf(buf, "%d\n", read_status(BT_ON)); 574} 575 576static ssize_t store_bluetooth(struct device *dev, 577 struct device_attribute *attr, const char *buf, 578 size_t count) 579{ 580 return store_status(buf, count, bt_switch_handle, BT_ON); 581} 582 583/* 584 * Display 585 */ 586static void set_display(int value) 587{ 588 /* no sanity check needed for now */ 589 if (!write_acpi_int(display_set_handle, NULL, value, NULL)) 590 printk(ASUS_WARNING "Error setting display\n"); 591 return; 592} 593 594static int read_display(void) 595{ 596 ulong value = 0; 597 acpi_status rv = AE_OK; 598 599 /* In most of the case, we know how to set the display, but sometime 600 we can't read it */ 601 if (display_get_handle) { 602 rv = acpi_evaluate_integer(display_get_handle, NULL, 603 NULL, &value); 604 if (ACPI_FAILURE(rv)) 605 printk(ASUS_WARNING "Error reading display status\n"); 606 } 607 608 value &= 0x0F; /* needed for some models, shouldn't hurt others */ 609 610 return value; 611} 612 613/* 614 * Now, *this* one could be more user-friendly, but so far, no-one has 615 * complained. The significance of bits is the same as in store_disp() 616 */ 617static ssize_t show_disp(struct device *dev, 618 struct device_attribute *attr, char *buf) 619{ 620 return sprintf(buf, "%d\n", read_display()); 621} 622 623/* 624 * Experimental support for display switching. As of now: 1 should activate 625 * the LCD output, 2 should do for CRT, 4 for TV-Out and 8 for DVI. 626 * Any combination (bitwise) of these will suffice. I never actually tested 4 627 * displays hooked up simultaneously, so be warned. See the acpi4asus README 628 * for more info. 629 */ 630static ssize_t store_disp(struct device *dev, struct device_attribute *attr, 631 const char *buf, size_t count) 632{ 633 int rv, value; 634 635 rv = parse_arg(buf, count, &value); 636 if (rv > 0) 637 set_display(value); 638 return rv; 639} 640 641/* 642 * Light Sens 643 */ 644static void set_light_sens_switch(int value) 645{ 646 if (!write_acpi_int(ls_switch_handle, NULL, value, NULL)) 647 printk(ASUS_WARNING "Error setting light sensor switch\n"); 648 hotk->light_switch = value; 649} 650 651static ssize_t show_lssw(struct device *dev, 652 struct device_attribute *attr, char *buf) 653{ 654 return sprintf(buf, "%d\n", hotk->light_switch); 655} 656 657static ssize_t store_lssw(struct device *dev, struct device_attribute *attr, 658 const char *buf, size_t count) 659{ 660 int rv, value; 661 662 rv = parse_arg(buf, count, &value); 663 if (rv > 0) 664 set_light_sens_switch(value ? 1 : 0); 665 666 return rv; 667} 668 669static void set_light_sens_level(int value) 670{ 671 if (!write_acpi_int(ls_level_handle, NULL, value, NULL)) 672 printk(ASUS_WARNING "Error setting light sensor level\n"); 673 hotk->light_level = value; 674} 675 676static ssize_t show_lslvl(struct device *dev, 677 struct device_attribute *attr, char *buf) 678{ 679 return sprintf(buf, "%d\n", hotk->light_level); 680} 681 682static ssize_t store_lslvl(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 value = (0 < value) ? ((15 < value) ? 15 : value) : 0; 690 /* 0 <= value <= 15 */ 691 set_light_sens_level(value); 692 } 693 694 return rv; 695} 696 697/* 698 * GPS 699 */ 700static ssize_t show_gps(struct device *dev, 701 struct device_attribute *attr, char *buf) 702{ 703 return sprintf(buf, "%d\n", read_status(GPS_ON)); 704} 705 706static ssize_t store_gps(struct device *dev, struct device_attribute *attr, 707 const char *buf, size_t count) 708{ 709 return store_status(buf, count, NULL, GPS_ON); 710} 711 712static void asus_hotk_notify(acpi_handle handle, u32 event, void *data) 713{ 714 /* TODO Find a better way to handle events count. */ 715 if (!hotk) 716 return; 717 718 /* 719 * We need to tell the backlight device when the backlight power is 720 * switched 721 */ 722 if (event == ATKD_LCD_ON) { 723 write_status(NULL, 1, LCD_ON); 724 lcd_blank(FB_BLANK_UNBLANK); 725 } else if (event == ATKD_LCD_OFF) { 726 write_status(NULL, 0, LCD_ON); 727 lcd_blank(FB_BLANK_POWERDOWN); 728 } 729 730 acpi_bus_generate_event(hotk->device, event, 731 hotk->event_count[event % 128]++); 732 733 return; 734} 735 736#define ASUS_CREATE_DEVICE_ATTR(_name) \ 737 struct device_attribute dev_attr_##_name = { \ 738 .attr = { \ 739 .name = __stringify(_name), \ 740 .mode = 0, \ 741 .owner = THIS_MODULE }, \ 742 .show = NULL, \ 743 .store = NULL, \ 744 } 745 746#define ASUS_SET_DEVICE_ATTR(_name, _mode, _show, _store) \ 747 do { \ 748 dev_attr_##_name.attr.mode = _mode; \ 749 dev_attr_##_name.show = _show; \ 750 dev_attr_##_name.store = _store; \ 751 } while(0) 752 753static ASUS_CREATE_DEVICE_ATTR(infos); 754static ASUS_CREATE_DEVICE_ATTR(wlan); 755static ASUS_CREATE_DEVICE_ATTR(bluetooth); 756static ASUS_CREATE_DEVICE_ATTR(display); 757static ASUS_CREATE_DEVICE_ATTR(ledd); 758static ASUS_CREATE_DEVICE_ATTR(ls_switch); 759static ASUS_CREATE_DEVICE_ATTR(ls_level); 760static ASUS_CREATE_DEVICE_ATTR(gps); 761 762static struct attribute *asuspf_attributes[] = { 763 &dev_attr_infos.attr, 764 &dev_attr_wlan.attr, 765 &dev_attr_bluetooth.attr, 766 &dev_attr_display.attr, 767 &dev_attr_ledd.attr, 768 &dev_attr_ls_switch.attr, 769 &dev_attr_ls_level.attr, 770 &dev_attr_gps.attr, 771 NULL 772}; 773 774static struct attribute_group asuspf_attribute_group = { 775 .attrs = asuspf_attributes 776}; 777 778static struct platform_driver asuspf_driver = { 779 .driver = { 780 .name = ASUS_HOTK_FILE, 781 .owner = THIS_MODULE, 782 } 783}; 784 785static struct platform_device *asuspf_device; 786 787static void asus_hotk_add_fs(void) 788{ 789 ASUS_SET_DEVICE_ATTR(infos, 0444, show_infos, NULL); 790 791 if (wl_switch_handle) 792 ASUS_SET_DEVICE_ATTR(wlan, 0644, show_wlan, store_wlan); 793 794 if (bt_switch_handle) 795 ASUS_SET_DEVICE_ATTR(bluetooth, 0644, 796 show_bluetooth, store_bluetooth); 797 798 if (display_set_handle && display_get_handle) 799 ASUS_SET_DEVICE_ATTR(display, 0644, show_disp, store_disp); 800 else if (display_set_handle) 801 ASUS_SET_DEVICE_ATTR(display, 0200, NULL, store_disp); 802 803 if (ledd_set_handle) 804 ASUS_SET_DEVICE_ATTR(ledd, 0644, show_ledd, store_ledd); 805 806 if (ls_switch_handle && ls_level_handle) { 807 ASUS_SET_DEVICE_ATTR(ls_level, 0644, show_lslvl, store_lslvl); 808 ASUS_SET_DEVICE_ATTR(ls_switch, 0644, show_lssw, store_lssw); 809 } 810 811 if (gps_status_handle && gps_on_handle && gps_off_handle) 812 ASUS_SET_DEVICE_ATTR(gps, 0644, show_gps, store_gps); 813} 814 815static int asus_handle_init(char *name, acpi_handle * handle, 816 char **paths, int num_paths) 817{ 818 int i; 819 acpi_status status; 820 821 for (i = 0; i < num_paths; i++) { 822 status = acpi_get_handle(NULL, paths[i], handle); 823 if (ACPI_SUCCESS(status)) 824 return 0; 825 } 826 827 *handle = NULL; 828 return -ENODEV; 829} 830 831#define ASUS_HANDLE_INIT(object) \ 832 asus_handle_init(#object, &object##_handle, object##_paths, \ 833 ARRAY_SIZE(object##_paths)) 834 835/* 836 * This function is used to initialize the hotk with right values. In this 837 * method, we can make all the detection we want, and modify the hotk struct 838 */ 839static int asus_hotk_get_info(void) 840{ 841 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; 842 union acpi_object *model = NULL; 843 ulong bsts_result, hwrs_result; 844 char *string = NULL; 845 acpi_status status; 846 847 /* 848 * Get DSDT headers early enough to allow for differentiating between 849 * models, but late enough to allow acpi_bus_register_driver() to fail 850 * before doing anything ACPI-specific. Should we encounter a machine, 851 * which needs special handling (i.e. its hotkey device has a different 852 * HID), this bit will be moved. A global variable asus_info contains 853 * the DSDT header. 854 */ 855 status = acpi_get_table(ACPI_SIG_DSDT, 1, &asus_info); 856 if (ACPI_FAILURE(status)) 857 printk(ASUS_WARNING "Couldn't get the DSDT table header\n"); 858 859 /* We have to write 0 on init this far for all ASUS models */ 860 if (!write_acpi_int(hotk->handle, "INIT", 0, &buffer)) { 861 printk(ASUS_ERR "Hotkey initialization failed\n"); 862 return -ENODEV; 863 } 864 865 /* This needs to be called for some laptops to init properly */ 866 status = 867 acpi_evaluate_integer(hotk->handle, "BSTS", NULL, &bsts_result); 868 if (ACPI_FAILURE(status)) 869 printk(ASUS_WARNING "Error calling BSTS\n"); 870 else if (bsts_result) 871 printk(ASUS_NOTICE "BSTS called, 0x%02x returned\n", 872 (uint) bsts_result); 873 874 /* This too ... */ 875 write_acpi_int(hotk->handle, "CWAP", wapf, NULL); 876 877 /* 878 * Try to match the object returned by INIT to the specific model. 879 * Handle every possible object (or the lack of thereof) the DSDT 880 * writers might throw at us. When in trouble, we pass NULL to 881 * asus_model_match() and try something completely different. 882 */ 883 if (buffer.pointer) { 884 model = buffer.pointer; 885 switch (model->type) { 886 case ACPI_TYPE_STRING: 887 string = model->string.pointer; 888 break; 889 case ACPI_TYPE_BUFFER: 890 string = model->buffer.pointer; 891 break; 892 default: 893 string = ""; 894 break; 895 } 896 } 897 hotk->name = kstrdup(string, GFP_KERNEL); 898 if (!hotk->name) 899 return -ENOMEM; 900 901 if (*string) 902 printk(ASUS_NOTICE " %s model detected\n", string); 903 904 ASUS_HANDLE_INIT(mled_set); 905 ASUS_HANDLE_INIT(tled_set); 906 ASUS_HANDLE_INIT(rled_set); 907 ASUS_HANDLE_INIT(pled_set); 908 ASUS_HANDLE_INIT(gled_set); 909 910 ASUS_HANDLE_INIT(ledd_set); 911 912 /* 913 * The HWRS method return informations about the hardware. 914 * 0x80 bit is for WLAN, 0x100 for Bluetooth. 915 * The significance of others is yet to be found. 916 * If we don't find the method, we assume the device are present. 917 */ 918 status = 919 acpi_evaluate_integer(hotk->handle, "HRWS", NULL, &hwrs_result); 920 if (ACPI_FAILURE(status)) 921 hwrs_result = WL_HWRS | BT_HWRS; 922 923 if (hwrs_result & WL_HWRS) 924 ASUS_HANDLE_INIT(wl_switch); 925 if (hwrs_result & BT_HWRS) 926 ASUS_HANDLE_INIT(bt_switch); 927 928 ASUS_HANDLE_INIT(wireless_status); 929 930 ASUS_HANDLE_INIT(brightness_set); 931 ASUS_HANDLE_INIT(brightness_get); 932 933 ASUS_HANDLE_INIT(lcd_switch); 934 935 ASUS_HANDLE_INIT(display_set); 936 ASUS_HANDLE_INIT(display_get); 937 938 /* There is a lot of models with "ALSL", but a few get 939 a real light sens, so we need to check it. */ 940 if (!ASUS_HANDLE_INIT(ls_switch)) 941 ASUS_HANDLE_INIT(ls_level); 942 943 ASUS_HANDLE_INIT(gps_on); 944 ASUS_HANDLE_INIT(gps_off); 945 ASUS_HANDLE_INIT(gps_status); 946 947 kfree(model); 948 949 return AE_OK; 950} 951 952static int asus_hotk_check(void) 953{ 954 int result = 0; 955 956 result = acpi_bus_get_status(hotk->device); 957 if (result) 958 return result; 959 960 if (hotk->device->status.present) { 961 result = asus_hotk_get_info(); 962 } else { 963 printk(ASUS_ERR "Hotkey device not present, aborting\n"); 964 return -EINVAL; 965 } 966 967 return result; 968} 969 970static int asus_hotk_found; 971 972static int asus_hotk_add(struct acpi_device *device) 973{ 974 acpi_status status = AE_OK; 975 int result; 976 977 if (!device) 978 return -EINVAL; 979 980 printk(ASUS_NOTICE "Asus Laptop Support version %s\n", 981 ASUS_LAPTOP_VERSION); 982 983 hotk = kmalloc(sizeof(struct asus_hotk), GFP_KERNEL); 984 if (!hotk) 985 return -ENOMEM; 986 memset(hotk, 0, sizeof(struct asus_hotk)); 987 988 hotk->handle = device->handle; 989 strcpy(acpi_device_name(device), ASUS_HOTK_DEVICE_NAME); 990 strcpy(acpi_device_class(device), ASUS_HOTK_CLASS); 991 acpi_driver_data(device) = hotk; 992 hotk->device = device; 993 994 result = asus_hotk_check(); 995 if (result) 996 goto end; 997 998 asus_hotk_add_fs(); 999 1000 /* 1001 * We install the handler, it will receive the hotk in parameter, so, we 1002 * could add other data to the hotk struct 1003 */ 1004 status = acpi_install_notify_handler(hotk->handle, ACPI_ALL_NOTIFY, 1005 asus_hotk_notify, hotk); 1006 if (ACPI_FAILURE(status)) 1007 printk(ASUS_ERR "Error installing notify handler\n"); 1008 1009 asus_hotk_found = 1; 1010 1011 /* WLED and BLED are on by default */ 1012 write_status(bt_switch_handle, 1, BT_ON); 1013 write_status(wl_switch_handle, 1, WL_ON); 1014 1015 /* If the h/w switch is off, we need to check the real status */ 1016 write_status(NULL, read_status(BT_ON), BT_ON); 1017 write_status(NULL, read_status(WL_ON), WL_ON); 1018 1019 /* LCD Backlight is on by default */ 1020 write_status(NULL, 1, LCD_ON); 1021 1022 /* LED display is off by default */ 1023 hotk->ledd_status = 0xFFF; 1024 1025 /* Set initial values of light sensor and level */ 1026 hotk->light_switch = 1; /* Default to light sensor disabled */ 1027 hotk->light_level = 0; /* level 5 for sensor sensitivity */ 1028 1029 if (ls_switch_handle) 1030 set_light_sens_switch(hotk->light_switch); 1031 1032 if (ls_level_handle) 1033 set_light_sens_level(hotk->light_level); 1034 1035 /* GPS is on by default */ 1036 write_status(NULL, 1, GPS_ON); 1037 1038 end: 1039 if (result) { 1040 kfree(hotk->name); 1041 kfree(hotk); 1042 } 1043 1044 return result; 1045} 1046 1047static int asus_hotk_remove(struct acpi_device *device, int type) 1048{ 1049 acpi_status status = 0; 1050 1051 if (!device || !acpi_driver_data(device)) 1052 return -EINVAL; 1053 1054 status = acpi_remove_notify_handler(hotk->handle, ACPI_ALL_NOTIFY, 1055 asus_hotk_notify); 1056 if (ACPI_FAILURE(status)) 1057 printk(ASUS_ERR "Error removing notify handler\n"); 1058 1059 kfree(hotk->name); 1060 kfree(hotk); 1061 1062 return 0; 1063} 1064 1065static void asus_backlight_exit(void) 1066{ 1067 if (asus_backlight_device) 1068 backlight_device_unregister(asus_backlight_device); 1069} 1070 1071#define ASUS_LED_UNREGISTER(object) \ 1072 if(object##_led.class_dev \ 1073 && !IS_ERR(object##_led.class_dev)) \ 1074 led_classdev_unregister(&object##_led) 1075 1076static void asus_led_exit(void) 1077{ 1078 ASUS_LED_UNREGISTER(mled); 1079 ASUS_LED_UNREGISTER(tled); 1080 ASUS_LED_UNREGISTER(pled); 1081 ASUS_LED_UNREGISTER(rled); 1082 ASUS_LED_UNREGISTER(gled); 1083 1084 destroy_workqueue(led_workqueue); 1085} 1086 1087static void __exit asus_laptop_exit(void) 1088{ 1089 asus_backlight_exit(); 1090 asus_led_exit(); 1091 1092 acpi_bus_unregister_driver(&asus_hotk_driver); 1093 sysfs_remove_group(&asuspf_device->dev.kobj, &asuspf_attribute_group); 1094 platform_device_unregister(asuspf_device); 1095 platform_driver_unregister(&asuspf_driver); 1096} 1097 1098static int asus_backlight_init(struct device *dev) 1099{ 1100 struct backlight_device *bd; 1101 1102 if (brightness_set_handle && lcd_switch_handle) { 1103 bd = backlight_device_register(ASUS_HOTK_FILE, dev, 1104 NULL, &asusbl_ops); 1105 if (IS_ERR(bd)) { 1106 printk(ASUS_ERR 1107 "Could not register asus backlight device\n"); 1108 asus_backlight_device = NULL; 1109 return PTR_ERR(bd); 1110 } 1111 1112 asus_backlight_device = bd; 1113 1114 bd->props.max_brightness = 15; 1115 bd->props.brightness = read_brightness(NULL); 1116 bd->props.power = FB_BLANK_UNBLANK; 1117 backlight_update_status(bd); 1118 } 1119 return 0; 1120} 1121 1122static int asus_led_register(acpi_handle handle, 1123 struct led_classdev *ldev, struct device *dev) 1124{ 1125 if (!handle) 1126 return 0; 1127 1128 return led_classdev_register(dev, ldev); 1129} 1130 1131#define ASUS_LED_REGISTER(object, device) \ 1132 asus_led_register(object##_set_handle, &object##_led, device) 1133 1134static int asus_led_init(struct device *dev) 1135{ 1136 int rv; 1137 1138 rv = ASUS_LED_REGISTER(mled, dev); 1139 if (rv) 1140 return rv; 1141 1142 rv = ASUS_LED_REGISTER(tled, dev); 1143 if (rv) 1144 return rv; 1145 1146 rv = ASUS_LED_REGISTER(rled, dev); 1147 if (rv) 1148 return rv; 1149 1150 rv = ASUS_LED_REGISTER(pled, dev); 1151 if (rv) 1152 return rv; 1153 1154 rv = ASUS_LED_REGISTER(gled, dev); 1155 if (rv) 1156 return rv; 1157 1158 led_workqueue = create_singlethread_workqueue("led_workqueue"); 1159 if (!led_workqueue) 1160 return -ENOMEM; 1161 1162 return 0; 1163} 1164 1165static int __init asus_laptop_init(void) 1166{ 1167 struct device *dev; 1168 int result; 1169 1170 if (acpi_disabled) 1171 return -ENODEV; 1172 1173 result = acpi_bus_register_driver(&asus_hotk_driver); 1174 if (result < 0) 1175 return result; 1176 1177 /* 1178 * This is a bit of a kludge. We only want this module loaded 1179 * for ASUS systems, but there's currently no way to probe the 1180 * ACPI namespace for ASUS HIDs. So we just return failure if 1181 * we didn't find one, which will cause the module to be 1182 * unloaded. 1183 */ 1184 if (!asus_hotk_found) { 1185 acpi_bus_unregister_driver(&asus_hotk_driver); 1186 return -ENODEV; 1187 } 1188 1189 dev = acpi_get_physical_device(hotk->device->handle); 1190 1191 result = asus_backlight_init(dev); 1192 if (result) 1193 goto fail_backlight; 1194 1195 result = asus_led_init(dev); 1196 if (result) 1197 goto fail_led; 1198 1199 /* Register platform stuff */ 1200 result = platform_driver_register(&asuspf_driver); 1201 if (result) 1202 goto fail_platform_driver; 1203 1204 asuspf_device = platform_device_alloc(ASUS_HOTK_FILE, -1); 1205 if (!asuspf_device) { 1206 result = -ENOMEM; 1207 goto fail_platform_device1; 1208 } 1209 1210 result = platform_device_add(asuspf_device); 1211 if (result) 1212 goto fail_platform_device2; 1213 1214 result = sysfs_create_group(&asuspf_device->dev.kobj, 1215 &asuspf_attribute_group); 1216 if (result) 1217 goto fail_sysfs; 1218 1219 return 0; 1220 1221 fail_sysfs: 1222 platform_device_del(asuspf_device); 1223 1224 fail_platform_device2: 1225 platform_device_put(asuspf_device); 1226 1227 fail_platform_device1: 1228 platform_driver_unregister(&asuspf_driver); 1229 1230 fail_platform_driver: 1231 asus_led_exit(); 1232 1233 fail_led: 1234 asus_backlight_exit(); 1235 1236 fail_backlight: 1237 1238 return result; 1239} 1240 1241module_init(asus_laptop_init); 1242module_exit(asus_laptop_exit); 1243