asus-laptop.c revision 41b16dce390510f550a4d2b12b98e0258bbed6e2
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/kernel.h> 37#include <linux/module.h> 38#include <linux/init.h> 39#include <linux/types.h> 40#include <linux/err.h> 41#include <linux/proc_fs.h> 42#include <linux/backlight.h> 43#include <linux/fb.h> 44#include <linux/leds.h> 45#include <linux/platform_device.h> 46#include <acpi/acpi_drivers.h> 47#include <acpi/acpi_bus.h> 48#include <asm/uaccess.h> 49 50#define ASUS_LAPTOP_VERSION "0.42" 51 52#define ASUS_HOTK_NAME "Asus Laptop Support" 53#define ASUS_HOTK_CLASS "hotkey" 54#define ASUS_HOTK_DEVICE_NAME "Hotkey" 55#define ASUS_HOTK_FILE "asus-laptop" 56#define ASUS_HOTK_PREFIX "\\_SB.ATKD." 57 58/* 59 * Some events we use, same for all Asus 60 */ 61#define ATKD_BR_UP 0x10 62#define ATKD_BR_DOWN 0x20 63#define ATKD_LCD_ON 0x33 64#define ATKD_LCD_OFF 0x34 65 66/* 67 * Known bits returned by \_SB.ATKD.HWRS 68 */ 69#define WL_HWRS 0x80 70#define BT_HWRS 0x100 71 72/* 73 * Flags for hotk status 74 * WL_ON and BT_ON are also used for wireless_status() 75 */ 76#define WL_ON 0x01 //internal Wifi 77#define BT_ON 0x02 //internal Bluetooth 78#define MLED_ON 0x04 //mail LED 79#define TLED_ON 0x08 //touchpad LED 80#define RLED_ON 0x10 //Record LED 81#define PLED_ON 0x20 //Phone LED 82#define GLED_ON 0x40 //Gaming LED 83#define LCD_ON 0x80 //LCD backlight 84#define GPS_ON 0x100 //GPS 85 86#define ASUS_LOG ASUS_HOTK_FILE ": " 87#define ASUS_ERR KERN_ERR ASUS_LOG 88#define ASUS_WARNING KERN_WARNING ASUS_LOG 89#define ASUS_NOTICE KERN_NOTICE ASUS_LOG 90#define ASUS_INFO KERN_INFO ASUS_LOG 91#define ASUS_DEBUG KERN_DEBUG ASUS_LOG 92 93MODULE_AUTHOR("Julien Lerouge, Karol Kozimor, Corentin Chary"); 94MODULE_DESCRIPTION(ASUS_HOTK_NAME); 95MODULE_LICENSE("GPL"); 96 97/* WAPF defines the behavior of the Fn+Fx wlan key 98 * The significance of values is yet to be found, but 99 * most of the time: 100 * 0x0 will do nothing 101 * 0x1 will allow to control the device with Fn+Fx key. 102 * 0x4 will send an ACPI event (0x88) while pressing the Fn+Fx key 103 * 0x5 like 0x1 or 0x4 104 * So, if something doesn't work as you want, just try other values =) 105 */ 106static uint wapf = 1; 107module_param(wapf, uint, 0644); 108MODULE_PARM_DESC(wapf, "WAPF value"); 109 110#define ASUS_HANDLE(object, paths...) \ 111 static acpi_handle object##_handle = NULL; \ 112 static char *object##_paths[] = { paths } 113 114/* LED */ 115ASUS_HANDLE(mled_set, ASUS_HOTK_PREFIX "MLED"); 116ASUS_HANDLE(tled_set, ASUS_HOTK_PREFIX "TLED"); 117ASUS_HANDLE(rled_set, ASUS_HOTK_PREFIX "RLED"); /* W1JC */ 118ASUS_HANDLE(pled_set, ASUS_HOTK_PREFIX "PLED"); /* A7J */ 119ASUS_HANDLE(gled_set, ASUS_HOTK_PREFIX "GLED"); /* G1, G2 (probably) */ 120 121/* LEDD */ 122ASUS_HANDLE(ledd_set, ASUS_HOTK_PREFIX "SLCM"); 123 124/* Bluetooth and WLAN 125 * WLED and BLED are not handled like other XLED, because in some dsdt 126 * they also control the WLAN/Bluetooth device. 127 */ 128ASUS_HANDLE(wl_switch, ASUS_HOTK_PREFIX "WLED"); 129ASUS_HANDLE(bt_switch, ASUS_HOTK_PREFIX "BLED"); 130ASUS_HANDLE(wireless_status, ASUS_HOTK_PREFIX "RSTS"); /* All new models */ 131 132/* Brightness */ 133ASUS_HANDLE(brightness_set, ASUS_HOTK_PREFIX "SPLV"); 134ASUS_HANDLE(brightness_get, ASUS_HOTK_PREFIX "GPLV"); 135 136/* Backlight */ 137ASUS_HANDLE(lcd_switch, "\\_SB.PCI0.SBRG.EC0._Q10", /* All new models */ 138 "\\_SB.PCI0.ISA.EC0._Q10", /* A1x */ 139 "\\_SB.PCI0.PX40.ECD0._Q10", /* L3C */ 140 "\\_SB.PCI0.PX40.EC0.Q10", /* M1A */ 141 "\\_SB.PCI0.LPCB.EC0._Q10", /* P30 */ 142 "\\_SB.PCI0.LPCB.EC0._Q0E", /* P30/P35 */ 143 "\\_SB.PCI0.PX40.Q10", /* S1x */ 144 "\\Q10"); /* A2x, L2D, L3D, M2E */ 145 146/* Display */ 147ASUS_HANDLE(display_set, ASUS_HOTK_PREFIX "SDSP"); 148ASUS_HANDLE(display_get, "\\_SB.PCI0.P0P1.VGA.GETD", /* A6B, A6K A6R A7D F3JM L4R M6R A3G 149 M6A M6V VX-1 V6J V6V W3Z */ 150 "\\_SB.PCI0.P0P2.VGA.GETD", /* A3E A4K, A4D A4L A6J A7J A8J Z71V M9V 151 S5A M5A z33A W1Jc W2V G1 */ 152 "\\_SB.PCI0.P0P3.VGA.GETD", /* A6V A6Q */ 153 "\\_SB.PCI0.P0PA.VGA.GETD", /* A6T, A6M */ 154 "\\_SB.PCI0.PCI1.VGAC.NMAP", /* L3C */ 155 "\\_SB.PCI0.VGA.GETD", /* Z96F */ 156 "\\ACTD", /* A2D */ 157 "\\ADVG", /* A4G Z71A W1N W5A W5F M2N M3N M5N M6N S1N S5N */ 158 "\\DNXT", /* P30 */ 159 "\\INFB", /* A2H D1 L2D L3D L3H L2E L5D L5C M1A M2E L4L W3V */ 160 "\\SSTE"); /* A3F A6F A3N A3L M6N W3N W6A */ 161 162ASUS_HANDLE(ls_switch, ASUS_HOTK_PREFIX "ALSC"); /* Z71A Z71V */ 163ASUS_HANDLE(ls_level, ASUS_HOTK_PREFIX "ALSL"); /* Z71A Z71V */ 164 165/* GPS */ 166/* R2H use different handle for GPS on/off */ 167ASUS_HANDLE(gps_on, ASUS_HOTK_PREFIX "SDON"); /* R2H */ 168ASUS_HANDLE(gps_off, ASUS_HOTK_PREFIX "SDOF"); /* R2H */ 169ASUS_HANDLE(gps_status, ASUS_HOTK_PREFIX "GPST"); 170 171/* 172 * This is the main structure, we can use it to store anything interesting 173 * about the hotk device 174 */ 175struct asus_hotk { 176 char *name; //laptop name 177 struct acpi_device *device; //the device we are in 178 acpi_handle handle; //the handle of the hotk device 179 char status; //status of the hotk, for LEDs, ... 180 u32 ledd_status; //status of the LED display 181 u8 light_level; //light sensor level 182 u8 light_switch; //light sensor switch value 183 u16 event_count[128]; //count for each event TODO make this better 184}; 185 186/* 187 * This header is made available to allow proper configuration given model, 188 * revision number , ... this info cannot go in struct asus_hotk because it is 189 * available before the hotk 190 */ 191static struct acpi_table_header *asus_info; 192 193/* The actual device the driver binds to */ 194static struct asus_hotk *hotk; 195 196/* 197 * The hotkey driver declaration 198 */ 199static const struct acpi_device_id asus_device_ids[] = { 200 {"ATK0100", 0}, 201 {"", 0}, 202}; 203MODULE_DEVICE_TABLE(acpi, asus_device_ids); 204 205static int asus_hotk_add(struct acpi_device *device); 206static int asus_hotk_remove(struct acpi_device *device, int type); 207static struct acpi_driver asus_hotk_driver = { 208 .name = ASUS_HOTK_NAME, 209 .class = ASUS_HOTK_CLASS, 210 .ids = asus_device_ids, 211 .ops = { 212 .add = asus_hotk_add, 213 .remove = asus_hotk_remove, 214 }, 215}; 216 217/* The backlight device /sys/class/backlight */ 218static struct backlight_device *asus_backlight_device; 219 220/* 221 * The backlight class declaration 222 */ 223static int read_brightness(struct backlight_device *bd); 224static int update_bl_status(struct backlight_device *bd); 225static struct backlight_ops asusbl_ops = { 226 .get_brightness = read_brightness, 227 .update_status = update_bl_status, 228}; 229 230/* These functions actually update the LED's, and are called from a 231 * workqueue. By doing this as separate work rather than when the LED 232 * subsystem asks, we avoid messing with the Asus ACPI stuff during a 233 * potentially bad time, such as a timer interrupt. */ 234static struct workqueue_struct *led_workqueue; 235 236#define ASUS_LED(object, ledname) \ 237 static void object##_led_set(struct led_classdev *led_cdev, \ 238 enum led_brightness value); \ 239 static void object##_led_update(struct work_struct *ignored); \ 240 static int object##_led_wk; \ 241 static DECLARE_WORK(object##_led_work, object##_led_update); \ 242 static struct led_classdev object##_led = { \ 243 .name = "asus::" ledname, \ 244 .brightness_set = object##_led_set, \ 245 } 246 247ASUS_LED(mled, "mail"); 248ASUS_LED(tled, "touchpad"); 249ASUS_LED(rled, "record"); 250ASUS_LED(pled, "phone"); 251ASUS_LED(gled, "gaming"); 252 253/* 254 * This function evaluates an ACPI method, given an int as parameter, the 255 * method is searched within the scope of the handle, can be NULL. The output 256 * of the method is written is output, which can also be NULL 257 * 258 * returns 0 if write is successful, -1 else. 259 */ 260static int write_acpi_int(acpi_handle handle, const char *method, int val, 261 struct acpi_buffer *output) 262{ 263 struct acpi_object_list params; //list of input parameters (an int here) 264 union acpi_object in_obj; //the only param we use 265 acpi_status status; 266 267 if (!handle) 268 return 0; 269 270 params.count = 1; 271 params.pointer = &in_obj; 272 in_obj.type = ACPI_TYPE_INTEGER; 273 in_obj.integer.value = val; 274 275 status = acpi_evaluate_object(handle, (char *)method, ¶ms, output); 276 if (status == AE_OK) 277 return 0; 278 else 279 return -1; 280} 281 282static int read_wireless_status(int mask) 283{ 284 unsigned long long status; 285 acpi_status rv = AE_OK; 286 287 if (!wireless_status_handle) 288 return (hotk->status & mask) ? 1 : 0; 289 290 rv = acpi_evaluate_integer(wireless_status_handle, NULL, NULL, &status); 291 if (ACPI_FAILURE(rv)) 292 printk(ASUS_WARNING "Error reading Wireless status\n"); 293 else 294 return (status & mask) ? 1 : 0; 295 296 return (hotk->status & mask) ? 1 : 0; 297} 298 299static int read_gps_status(void) 300{ 301 unsigned long long status; 302 acpi_status rv = AE_OK; 303 304 rv = acpi_evaluate_integer(gps_status_handle, NULL, NULL, &status); 305 if (ACPI_FAILURE(rv)) 306 printk(ASUS_WARNING "Error reading GPS status\n"); 307 else 308 return status ? 1 : 0; 309 310 return (hotk->status & GPS_ON) ? 1 : 0; 311} 312 313/* Generic LED functions */ 314static int read_status(int mask) 315{ 316 /* There is a special method for both wireless devices */ 317 if (mask == BT_ON || mask == WL_ON) 318 return read_wireless_status(mask); 319 else if (mask == GPS_ON) 320 return read_gps_status(); 321 322 return (hotk->status & mask) ? 1 : 0; 323} 324 325static void write_status(acpi_handle handle, int out, int mask) 326{ 327 hotk->status = (out) ? (hotk->status | mask) : (hotk->status & ~mask); 328 329 switch (mask) { 330 case MLED_ON: 331 out = !(out & 0x1); 332 break; 333 case GLED_ON: 334 out = (out & 0x1) + 1; 335 break; 336 case GPS_ON: 337 handle = (out) ? gps_on_handle : gps_off_handle; 338 out = 0x02; 339 break; 340 default: 341 out &= 0x1; 342 break; 343 } 344 345 if (write_acpi_int(handle, NULL, out, NULL)) 346 printk(ASUS_WARNING " write failed %x\n", mask); 347} 348 349/* /sys/class/led handlers */ 350#define ASUS_LED_HANDLER(object, mask) \ 351 static void object##_led_set(struct led_classdev *led_cdev, \ 352 enum led_brightness value) \ 353 { \ 354 object##_led_wk = (value > 0) ? 1 : 0; \ 355 queue_work(led_workqueue, &object##_led_work); \ 356 } \ 357 static void object##_led_update(struct work_struct *ignored) \ 358 { \ 359 int value = object##_led_wk; \ 360 write_status(object##_set_handle, value, (mask)); \ 361 } 362 363ASUS_LED_HANDLER(mled, MLED_ON); 364ASUS_LED_HANDLER(pled, PLED_ON); 365ASUS_LED_HANDLER(rled, RLED_ON); 366ASUS_LED_HANDLER(tled, TLED_ON); 367ASUS_LED_HANDLER(gled, GLED_ON); 368 369static int get_lcd_state(void) 370{ 371 return read_status(LCD_ON); 372} 373 374static int set_lcd_state(int value) 375{ 376 int lcd = 0; 377 acpi_status status = 0; 378 379 lcd = value ? 1 : 0; 380 381 if (lcd == get_lcd_state()) 382 return 0; 383 384 if (lcd_switch_handle) { 385 status = acpi_evaluate_object(lcd_switch_handle, 386 NULL, NULL, NULL); 387 388 if (ACPI_FAILURE(status)) 389 printk(ASUS_WARNING "Error switching LCD\n"); 390 } 391 392 write_status(NULL, lcd, LCD_ON); 393 return 0; 394} 395 396static void lcd_blank(int blank) 397{ 398 struct backlight_device *bd = asus_backlight_device; 399 400 if (bd) { 401 bd->props.power = blank; 402 backlight_update_status(bd); 403 } 404} 405 406static int read_brightness(struct backlight_device *bd) 407{ 408 unsigned long long value; 409 acpi_status rv = AE_OK; 410 411 rv = acpi_evaluate_integer(brightness_get_handle, NULL, NULL, &value); 412 if (ACPI_FAILURE(rv)) 413 printk(ASUS_WARNING "Error reading brightness\n"); 414 415 return value; 416} 417 418static int set_brightness(struct backlight_device *bd, int value) 419{ 420 int ret = 0; 421 422 value = (0 < value) ? ((15 < value) ? 15 : value) : 0; 423 /* 0 <= value <= 15 */ 424 425 if (write_acpi_int(brightness_set_handle, NULL, value, NULL)) { 426 printk(ASUS_WARNING "Error changing brightness\n"); 427 ret = -EIO; 428 } 429 430 return ret; 431} 432 433static int update_bl_status(struct backlight_device *bd) 434{ 435 int rv; 436 int value = bd->props.brightness; 437 438 rv = set_brightness(bd, value); 439 if (rv) 440 return rv; 441 442 value = (bd->props.power == FB_BLANK_UNBLANK) ? 1 : 0; 443 return set_lcd_state(value); 444} 445 446/* 447 * Platform device handlers 448 */ 449 450/* 451 * We write our info in page, we begin at offset off and cannot write more 452 * than count bytes. We set eof to 1 if we handle those 2 values. We return the 453 * number of bytes written in page 454 */ 455static ssize_t show_infos(struct device *dev, 456 struct device_attribute *attr, char *page) 457{ 458 int len = 0; 459 unsigned long long temp; 460 char buf[16]; //enough for all info 461 acpi_status rv = AE_OK; 462 463 /* 464 * We use the easy way, we don't care of off and count, so we don't set eof 465 * to 1 466 */ 467 468 len += sprintf(page, ASUS_HOTK_NAME " " ASUS_LAPTOP_VERSION "\n"); 469 len += sprintf(page + len, "Model reference : %s\n", hotk->name); 470 /* 471 * The SFUN method probably allows the original driver to get the list 472 * of features supported by a given model. For now, 0x0100 or 0x0800 473 * bit signifies that the laptop is equipped with a Wi-Fi MiniPCI card. 474 * The significance of others is yet to be found. 475 */ 476 rv = acpi_evaluate_integer(hotk->handle, "SFUN", NULL, &temp); 477 if (!ACPI_FAILURE(rv)) 478 len += sprintf(page + len, "SFUN value : 0x%04x\n", 479 (uint) temp); 480 /* 481 * Another value for userspace: the ASYM method returns 0x02 for 482 * battery low and 0x04 for battery critical, its readings tend to be 483 * more accurate than those provided by _BST. 484 * Note: since not all the laptops provide this method, errors are 485 * silently ignored. 486 */ 487 rv = acpi_evaluate_integer(hotk->handle, "ASYM", NULL, &temp); 488 if (!ACPI_FAILURE(rv)) 489 len += sprintf(page + len, "ASYM value : 0x%04x\n", 490 (uint) temp); 491 if (asus_info) { 492 snprintf(buf, 16, "%d", asus_info->length); 493 len += sprintf(page + len, "DSDT length : %s\n", buf); 494 snprintf(buf, 16, "%d", asus_info->checksum); 495 len += sprintf(page + len, "DSDT checksum : %s\n", buf); 496 snprintf(buf, 16, "%d", asus_info->revision); 497 len += sprintf(page + len, "DSDT revision : %s\n", buf); 498 snprintf(buf, 7, "%s", asus_info->oem_id); 499 len += sprintf(page + len, "OEM id : %s\n", buf); 500 snprintf(buf, 9, "%s", asus_info->oem_table_id); 501 len += sprintf(page + len, "OEM table id : %s\n", buf); 502 snprintf(buf, 16, "%x", asus_info->oem_revision); 503 len += sprintf(page + len, "OEM revision : 0x%s\n", buf); 504 snprintf(buf, 5, "%s", asus_info->asl_compiler_id); 505 len += sprintf(page + len, "ASL comp vendor id : %s\n", buf); 506 snprintf(buf, 16, "%x", asus_info->asl_compiler_revision); 507 len += sprintf(page + len, "ASL comp revision : 0x%s\n", buf); 508 } 509 510 return len; 511} 512 513static int parse_arg(const char *buf, unsigned long count, int *val) 514{ 515 if (!count) 516 return 0; 517 if (count > 31) 518 return -EINVAL; 519 if (sscanf(buf, "%i", val) != 1) 520 return -EINVAL; 521 return count; 522} 523 524static ssize_t store_status(const char *buf, size_t count, 525 acpi_handle handle, int mask) 526{ 527 int rv, value; 528 int out = 0; 529 530 rv = parse_arg(buf, count, &value); 531 if (rv > 0) 532 out = value ? 1 : 0; 533 534 write_status(handle, out, mask); 535 536 return rv; 537} 538 539/* 540 * LEDD display 541 */ 542static ssize_t show_ledd(struct device *dev, 543 struct device_attribute *attr, char *buf) 544{ 545 return sprintf(buf, "0x%08x\n", hotk->ledd_status); 546} 547 548static ssize_t store_ledd(struct device *dev, struct device_attribute *attr, 549 const char *buf, size_t count) 550{ 551 int rv, value; 552 553 rv = parse_arg(buf, count, &value); 554 if (rv > 0) { 555 if (write_acpi_int(ledd_set_handle, NULL, value, NULL)) 556 printk(ASUS_WARNING "LED display write failed\n"); 557 else 558 hotk->ledd_status = (u32) value; 559 } 560 return rv; 561} 562 563/* 564 * WLAN 565 */ 566static ssize_t show_wlan(struct device *dev, 567 struct device_attribute *attr, char *buf) 568{ 569 return sprintf(buf, "%d\n", read_status(WL_ON)); 570} 571 572static ssize_t store_wlan(struct device *dev, struct device_attribute *attr, 573 const char *buf, size_t count) 574{ 575 return store_status(buf, count, wl_switch_handle, WL_ON); 576} 577 578/* 579 * Bluetooth 580 */ 581static ssize_t show_bluetooth(struct device *dev, 582 struct device_attribute *attr, char *buf) 583{ 584 return sprintf(buf, "%d\n", read_status(BT_ON)); 585} 586 587static ssize_t store_bluetooth(struct device *dev, 588 struct device_attribute *attr, const char *buf, 589 size_t count) 590{ 591 return store_status(buf, count, bt_switch_handle, BT_ON); 592} 593 594/* 595 * Display 596 */ 597static void set_display(int value) 598{ 599 /* no sanity check needed for now */ 600 if (write_acpi_int(display_set_handle, NULL, value, NULL)) 601 printk(ASUS_WARNING "Error setting display\n"); 602 return; 603} 604 605static int read_display(void) 606{ 607 unsigned long long value = 0; 608 acpi_status rv = AE_OK; 609 610 /* In most of the case, we know how to set the display, but sometime 611 we can't read it */ 612 if (display_get_handle) { 613 rv = acpi_evaluate_integer(display_get_handle, NULL, 614 NULL, &value); 615 if (ACPI_FAILURE(rv)) 616 printk(ASUS_WARNING "Error reading display status\n"); 617 } 618 619 value &= 0x0F; /* needed for some models, shouldn't hurt others */ 620 621 return value; 622} 623 624/* 625 * Now, *this* one could be more user-friendly, but so far, no-one has 626 * complained. The significance of bits is the same as in store_disp() 627 */ 628static ssize_t show_disp(struct device *dev, 629 struct device_attribute *attr, char *buf) 630{ 631 return sprintf(buf, "%d\n", read_display()); 632} 633 634/* 635 * Experimental support for display switching. As of now: 1 should activate 636 * the LCD output, 2 should do for CRT, 4 for TV-Out and 8 for DVI. 637 * Any combination (bitwise) of these will suffice. I never actually tested 4 638 * displays hooked up simultaneously, so be warned. See the acpi4asus README 639 * for more info. 640 */ 641static ssize_t store_disp(struct device *dev, struct device_attribute *attr, 642 const char *buf, size_t count) 643{ 644 int rv, value; 645 646 rv = parse_arg(buf, count, &value); 647 if (rv > 0) 648 set_display(value); 649 return rv; 650} 651 652/* 653 * Light Sens 654 */ 655static void set_light_sens_switch(int value) 656{ 657 if (write_acpi_int(ls_switch_handle, NULL, value, NULL)) 658 printk(ASUS_WARNING "Error setting light sensor switch\n"); 659 hotk->light_switch = value; 660} 661 662static ssize_t show_lssw(struct device *dev, 663 struct device_attribute *attr, char *buf) 664{ 665 return sprintf(buf, "%d\n", hotk->light_switch); 666} 667 668static ssize_t store_lssw(struct device *dev, struct device_attribute *attr, 669 const char *buf, size_t count) 670{ 671 int rv, value; 672 673 rv = parse_arg(buf, count, &value); 674 if (rv > 0) 675 set_light_sens_switch(value ? 1 : 0); 676 677 return rv; 678} 679 680static void set_light_sens_level(int value) 681{ 682 if (write_acpi_int(ls_level_handle, NULL, value, NULL)) 683 printk(ASUS_WARNING "Error setting light sensor level\n"); 684 hotk->light_level = value; 685} 686 687static ssize_t show_lslvl(struct device *dev, 688 struct device_attribute *attr, char *buf) 689{ 690 return sprintf(buf, "%d\n", hotk->light_level); 691} 692 693static ssize_t store_lslvl(struct device *dev, struct device_attribute *attr, 694 const char *buf, size_t count) 695{ 696 int rv, value; 697 698 rv = parse_arg(buf, count, &value); 699 if (rv > 0) { 700 value = (0 < value) ? ((15 < value) ? 15 : value) : 0; 701 /* 0 <= value <= 15 */ 702 set_light_sens_level(value); 703 } 704 705 return rv; 706} 707 708/* 709 * GPS 710 */ 711static ssize_t show_gps(struct device *dev, 712 struct device_attribute *attr, char *buf) 713{ 714 return sprintf(buf, "%d\n", read_status(GPS_ON)); 715} 716 717static ssize_t store_gps(struct device *dev, struct device_attribute *attr, 718 const char *buf, size_t count) 719{ 720 return store_status(buf, count, NULL, GPS_ON); 721} 722 723static void asus_hotk_notify(acpi_handle handle, u32 event, void *data) 724{ 725 /* TODO Find a better way to handle events count. */ 726 if (!hotk) 727 return; 728 729 /* 730 * We need to tell the backlight device when the backlight power is 731 * switched 732 */ 733 if (event == ATKD_LCD_ON) { 734 write_status(NULL, 1, LCD_ON); 735 lcd_blank(FB_BLANK_UNBLANK); 736 } else if (event == ATKD_LCD_OFF) { 737 write_status(NULL, 0, LCD_ON); 738 lcd_blank(FB_BLANK_POWERDOWN); 739 } 740 741 acpi_bus_generate_proc_event(hotk->device, event, 742 hotk->event_count[event % 128]++); 743 744 return; 745} 746 747#define ASUS_CREATE_DEVICE_ATTR(_name) \ 748 struct device_attribute dev_attr_##_name = { \ 749 .attr = { \ 750 .name = __stringify(_name), \ 751 .mode = 0 }, \ 752 .show = NULL, \ 753 .store = NULL, \ 754 } 755 756#define ASUS_SET_DEVICE_ATTR(_name, _mode, _show, _store) \ 757 do { \ 758 dev_attr_##_name.attr.mode = _mode; \ 759 dev_attr_##_name.show = _show; \ 760 dev_attr_##_name.store = _store; \ 761 } while(0) 762 763static ASUS_CREATE_DEVICE_ATTR(infos); 764static ASUS_CREATE_DEVICE_ATTR(wlan); 765static ASUS_CREATE_DEVICE_ATTR(bluetooth); 766static ASUS_CREATE_DEVICE_ATTR(display); 767static ASUS_CREATE_DEVICE_ATTR(ledd); 768static ASUS_CREATE_DEVICE_ATTR(ls_switch); 769static ASUS_CREATE_DEVICE_ATTR(ls_level); 770static ASUS_CREATE_DEVICE_ATTR(gps); 771 772static struct attribute *asuspf_attributes[] = { 773 &dev_attr_infos.attr, 774 &dev_attr_wlan.attr, 775 &dev_attr_bluetooth.attr, 776 &dev_attr_display.attr, 777 &dev_attr_ledd.attr, 778 &dev_attr_ls_switch.attr, 779 &dev_attr_ls_level.attr, 780 &dev_attr_gps.attr, 781 NULL 782}; 783 784static struct attribute_group asuspf_attribute_group = { 785 .attrs = asuspf_attributes 786}; 787 788static struct platform_driver asuspf_driver = { 789 .driver = { 790 .name = ASUS_HOTK_FILE, 791 .owner = THIS_MODULE, 792 } 793}; 794 795static struct platform_device *asuspf_device; 796 797static void asus_hotk_add_fs(void) 798{ 799 ASUS_SET_DEVICE_ATTR(infos, 0444, show_infos, NULL); 800 801 if (wl_switch_handle) 802 ASUS_SET_DEVICE_ATTR(wlan, 0644, show_wlan, store_wlan); 803 804 if (bt_switch_handle) 805 ASUS_SET_DEVICE_ATTR(bluetooth, 0644, 806 show_bluetooth, store_bluetooth); 807 808 if (display_set_handle && display_get_handle) 809 ASUS_SET_DEVICE_ATTR(display, 0644, show_disp, store_disp); 810 else if (display_set_handle) 811 ASUS_SET_DEVICE_ATTR(display, 0200, NULL, store_disp); 812 813 if (ledd_set_handle) 814 ASUS_SET_DEVICE_ATTR(ledd, 0644, show_ledd, store_ledd); 815 816 if (ls_switch_handle && ls_level_handle) { 817 ASUS_SET_DEVICE_ATTR(ls_level, 0644, show_lslvl, store_lslvl); 818 ASUS_SET_DEVICE_ATTR(ls_switch, 0644, show_lssw, store_lssw); 819 } 820 821 if (gps_status_handle && gps_on_handle && gps_off_handle) 822 ASUS_SET_DEVICE_ATTR(gps, 0644, show_gps, store_gps); 823} 824 825static int asus_handle_init(char *name, acpi_handle * handle, 826 char **paths, int num_paths) 827{ 828 int i; 829 acpi_status status; 830 831 for (i = 0; i < num_paths; i++) { 832 status = acpi_get_handle(NULL, paths[i], handle); 833 if (ACPI_SUCCESS(status)) 834 return 0; 835 } 836 837 *handle = NULL; 838 return -ENODEV; 839} 840 841#define ASUS_HANDLE_INIT(object) \ 842 asus_handle_init(#object, &object##_handle, object##_paths, \ 843 ARRAY_SIZE(object##_paths)) 844 845/* 846 * This function is used to initialize the hotk with right values. In this 847 * method, we can make all the detection we want, and modify the hotk struct 848 */ 849static int asus_hotk_get_info(void) 850{ 851 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; 852 union acpi_object *model = NULL; 853 unsigned long long bsts_result, hwrs_result; 854 char *string = NULL; 855 acpi_status status; 856 857 /* 858 * Get DSDT headers early enough to allow for differentiating between 859 * models, but late enough to allow acpi_bus_register_driver() to fail 860 * before doing anything ACPI-specific. Should we encounter a machine, 861 * which needs special handling (i.e. its hotkey device has a different 862 * HID), this bit will be moved. A global variable asus_info contains 863 * the DSDT header. 864 */ 865 status = acpi_get_table(ACPI_SIG_DSDT, 1, &asus_info); 866 if (ACPI_FAILURE(status)) 867 printk(ASUS_WARNING "Couldn't get the DSDT table header\n"); 868 869 /* We have to write 0 on init this far for all ASUS models */ 870 if (write_acpi_int(hotk->handle, "INIT", 0, &buffer)) { 871 printk(ASUS_ERR "Hotkey initialization failed\n"); 872 return -ENODEV; 873 } 874 875 /* This needs to be called for some laptops to init properly */ 876 status = 877 acpi_evaluate_integer(hotk->handle, "BSTS", NULL, &bsts_result); 878 if (ACPI_FAILURE(status)) 879 printk(ASUS_WARNING "Error calling BSTS\n"); 880 else if (bsts_result) 881 printk(ASUS_NOTICE "BSTS called, 0x%02x returned\n", 882 (uint) bsts_result); 883 884 /* This too ... */ 885 write_acpi_int(hotk->handle, "CWAP", wapf, NULL); 886 887 /* 888 * Try to match the object returned by INIT to the specific model. 889 * Handle every possible object (or the lack of thereof) the DSDT 890 * writers might throw at us. When in trouble, we pass NULL to 891 * asus_model_match() and try something completely different. 892 */ 893 if (buffer.pointer) { 894 model = buffer.pointer; 895 switch (model->type) { 896 case ACPI_TYPE_STRING: 897 string = model->string.pointer; 898 break; 899 case ACPI_TYPE_BUFFER: 900 string = model->buffer.pointer; 901 break; 902 default: 903 string = ""; 904 break; 905 } 906 } 907 hotk->name = kstrdup(string, GFP_KERNEL); 908 if (!hotk->name) 909 return -ENOMEM; 910 911 if (*string) 912 printk(ASUS_NOTICE " %s model detected\n", string); 913 914 ASUS_HANDLE_INIT(mled_set); 915 ASUS_HANDLE_INIT(tled_set); 916 ASUS_HANDLE_INIT(rled_set); 917 ASUS_HANDLE_INIT(pled_set); 918 ASUS_HANDLE_INIT(gled_set); 919 920 ASUS_HANDLE_INIT(ledd_set); 921 922 /* 923 * The HWRS method return informations about the hardware. 924 * 0x80 bit is for WLAN, 0x100 for Bluetooth. 925 * The significance of others is yet to be found. 926 * If we don't find the method, we assume the device are present. 927 */ 928 status = 929 acpi_evaluate_integer(hotk->handle, "HRWS", NULL, &hwrs_result); 930 if (ACPI_FAILURE(status)) 931 hwrs_result = WL_HWRS | BT_HWRS; 932 933 if (hwrs_result & WL_HWRS) 934 ASUS_HANDLE_INIT(wl_switch); 935 if (hwrs_result & BT_HWRS) 936 ASUS_HANDLE_INIT(bt_switch); 937 938 ASUS_HANDLE_INIT(wireless_status); 939 940 ASUS_HANDLE_INIT(brightness_set); 941 ASUS_HANDLE_INIT(brightness_get); 942 943 ASUS_HANDLE_INIT(lcd_switch); 944 945 ASUS_HANDLE_INIT(display_set); 946 ASUS_HANDLE_INIT(display_get); 947 948 /* There is a lot of models with "ALSL", but a few get 949 a real light sens, so we need to check it. */ 950 if (!ASUS_HANDLE_INIT(ls_switch)) 951 ASUS_HANDLE_INIT(ls_level); 952 953 ASUS_HANDLE_INIT(gps_on); 954 ASUS_HANDLE_INIT(gps_off); 955 ASUS_HANDLE_INIT(gps_status); 956 957 kfree(model); 958 959 return AE_OK; 960} 961 962static int asus_hotk_check(void) 963{ 964 int result = 0; 965 966 result = acpi_bus_get_status(hotk->device); 967 if (result) 968 return result; 969 970 if (hotk->device->status.present) { 971 result = asus_hotk_get_info(); 972 } else { 973 printk(ASUS_ERR "Hotkey device not present, aborting\n"); 974 return -EINVAL; 975 } 976 977 return result; 978} 979 980static int asus_hotk_found; 981 982static int asus_hotk_add(struct acpi_device *device) 983{ 984 acpi_status status = AE_OK; 985 int result; 986 987 if (!device) 988 return -EINVAL; 989 990 printk(ASUS_NOTICE "Asus Laptop Support version %s\n", 991 ASUS_LAPTOP_VERSION); 992 993 hotk = kzalloc(sizeof(struct asus_hotk), GFP_KERNEL); 994 if (!hotk) 995 return -ENOMEM; 996 997 hotk->handle = device->handle; 998 strcpy(acpi_device_name(device), ASUS_HOTK_DEVICE_NAME); 999 strcpy(acpi_device_class(device), ASUS_HOTK_CLASS); 1000 device->driver_data = hotk; 1001 hotk->device = device; 1002 1003 result = asus_hotk_check(); 1004 if (result) 1005 goto end; 1006 1007 asus_hotk_add_fs(); 1008 1009 /* 1010 * We install the handler, it will receive the hotk in parameter, so, we 1011 * could add other data to the hotk struct 1012 */ 1013 status = acpi_install_notify_handler(hotk->handle, ACPI_ALL_NOTIFY, 1014 asus_hotk_notify, hotk); 1015 if (ACPI_FAILURE(status)) 1016 printk(ASUS_ERR "Error installing notify handler\n"); 1017 1018 asus_hotk_found = 1; 1019 1020 /* WLED and BLED are on by default */ 1021 write_status(bt_switch_handle, 1, BT_ON); 1022 write_status(wl_switch_handle, 1, WL_ON); 1023 1024 /* If the h/w switch is off, we need to check the real status */ 1025 write_status(NULL, read_status(BT_ON), BT_ON); 1026 write_status(NULL, read_status(WL_ON), WL_ON); 1027 1028 /* LCD Backlight is on by default */ 1029 write_status(NULL, 1, LCD_ON); 1030 1031 /* LED display is off by default */ 1032 hotk->ledd_status = 0xFFF; 1033 1034 /* Set initial values of light sensor and level */ 1035 hotk->light_switch = 1; /* Default to light sensor disabled */ 1036 hotk->light_level = 0; /* level 5 for sensor sensitivity */ 1037 1038 if (ls_switch_handle) 1039 set_light_sens_switch(hotk->light_switch); 1040 1041 if (ls_level_handle) 1042 set_light_sens_level(hotk->light_level); 1043 1044 /* GPS is on by default */ 1045 write_status(NULL, 1, GPS_ON); 1046 1047 end: 1048 if (result) { 1049 kfree(hotk->name); 1050 kfree(hotk); 1051 } 1052 1053 return result; 1054} 1055 1056static int asus_hotk_remove(struct acpi_device *device, int type) 1057{ 1058 acpi_status status = 0; 1059 1060 if (!device || !acpi_driver_data(device)) 1061 return -EINVAL; 1062 1063 status = acpi_remove_notify_handler(hotk->handle, ACPI_ALL_NOTIFY, 1064 asus_hotk_notify); 1065 if (ACPI_FAILURE(status)) 1066 printk(ASUS_ERR "Error removing notify handler\n"); 1067 1068 kfree(hotk->name); 1069 kfree(hotk); 1070 1071 return 0; 1072} 1073 1074static void asus_backlight_exit(void) 1075{ 1076 if (asus_backlight_device) 1077 backlight_device_unregister(asus_backlight_device); 1078} 1079 1080#define ASUS_LED_UNREGISTER(object) \ 1081 if (object##_led.dev) \ 1082 led_classdev_unregister(&object##_led) 1083 1084static void asus_led_exit(void) 1085{ 1086 destroy_workqueue(led_workqueue); 1087 ASUS_LED_UNREGISTER(mled); 1088 ASUS_LED_UNREGISTER(tled); 1089 ASUS_LED_UNREGISTER(pled); 1090 ASUS_LED_UNREGISTER(rled); 1091 ASUS_LED_UNREGISTER(gled); 1092} 1093 1094static void __exit asus_laptop_exit(void) 1095{ 1096 asus_backlight_exit(); 1097 asus_led_exit(); 1098 1099 acpi_bus_unregister_driver(&asus_hotk_driver); 1100 sysfs_remove_group(&asuspf_device->dev.kobj, &asuspf_attribute_group); 1101 platform_device_unregister(asuspf_device); 1102 platform_driver_unregister(&asuspf_driver); 1103} 1104 1105static int asus_backlight_init(struct device *dev) 1106{ 1107 struct backlight_device *bd; 1108 1109 if (brightness_set_handle && lcd_switch_handle) { 1110 bd = backlight_device_register(ASUS_HOTK_FILE, dev, 1111 NULL, &asusbl_ops); 1112 if (IS_ERR(bd)) { 1113 printk(ASUS_ERR 1114 "Could not register asus backlight device\n"); 1115 asus_backlight_device = NULL; 1116 return PTR_ERR(bd); 1117 } 1118 1119 asus_backlight_device = bd; 1120 1121 bd->props.max_brightness = 15; 1122 bd->props.brightness = read_brightness(NULL); 1123 bd->props.power = FB_BLANK_UNBLANK; 1124 backlight_update_status(bd); 1125 } 1126 return 0; 1127} 1128 1129static int asus_led_register(acpi_handle handle, 1130 struct led_classdev *ldev, struct device *dev) 1131{ 1132 if (!handle) 1133 return 0; 1134 1135 return led_classdev_register(dev, ldev); 1136} 1137 1138#define ASUS_LED_REGISTER(object, device) \ 1139 asus_led_register(object##_set_handle, &object##_led, device) 1140 1141static int asus_led_init(struct device *dev) 1142{ 1143 int rv; 1144 1145 rv = ASUS_LED_REGISTER(mled, dev); 1146 if (rv) 1147 goto out; 1148 1149 rv = ASUS_LED_REGISTER(tled, dev); 1150 if (rv) 1151 goto out1; 1152 1153 rv = ASUS_LED_REGISTER(rled, dev); 1154 if (rv) 1155 goto out2; 1156 1157 rv = ASUS_LED_REGISTER(pled, dev); 1158 if (rv) 1159 goto out3; 1160 1161 rv = ASUS_LED_REGISTER(gled, dev); 1162 if (rv) 1163 goto out4; 1164 1165 led_workqueue = create_singlethread_workqueue("led_workqueue"); 1166 if (!led_workqueue) 1167 goto out5; 1168 1169 return 0; 1170out5: 1171 rv = -ENOMEM; 1172 ASUS_LED_UNREGISTER(gled); 1173out4: 1174 ASUS_LED_UNREGISTER(pled); 1175out3: 1176 ASUS_LED_UNREGISTER(rled); 1177out2: 1178 ASUS_LED_UNREGISTER(tled); 1179out1: 1180 ASUS_LED_UNREGISTER(mled); 1181out: 1182 return rv; 1183} 1184 1185static int __init asus_laptop_init(void) 1186{ 1187 struct device *dev; 1188 int result; 1189 1190 if (acpi_disabled) 1191 return -ENODEV; 1192 1193 result = acpi_bus_register_driver(&asus_hotk_driver); 1194 if (result < 0) 1195 return result; 1196 1197 /* 1198 * This is a bit of a kludge. We only want this module loaded 1199 * for ASUS systems, but there's currently no way to probe the 1200 * ACPI namespace for ASUS HIDs. So we just return failure if 1201 * we didn't find one, which will cause the module to be 1202 * unloaded. 1203 */ 1204 if (!asus_hotk_found) { 1205 acpi_bus_unregister_driver(&asus_hotk_driver); 1206 return -ENODEV; 1207 } 1208 1209 dev = acpi_get_physical_device(hotk->device->handle); 1210 1211 if (!acpi_video_backlight_support()) { 1212 result = asus_backlight_init(dev); 1213 if (result) 1214 goto fail_backlight; 1215 } else 1216 printk(ASUS_INFO "Brightness ignored, must be controlled by " 1217 "ACPI video driver\n"); 1218 1219 result = asus_led_init(dev); 1220 if (result) 1221 goto fail_led; 1222 1223 /* Register platform stuff */ 1224 result = platform_driver_register(&asuspf_driver); 1225 if (result) 1226 goto fail_platform_driver; 1227 1228 asuspf_device = platform_device_alloc(ASUS_HOTK_FILE, -1); 1229 if (!asuspf_device) { 1230 result = -ENOMEM; 1231 goto fail_platform_device1; 1232 } 1233 1234 result = platform_device_add(asuspf_device); 1235 if (result) 1236 goto fail_platform_device2; 1237 1238 result = sysfs_create_group(&asuspf_device->dev.kobj, 1239 &asuspf_attribute_group); 1240 if (result) 1241 goto fail_sysfs; 1242 1243 return 0; 1244 1245 fail_sysfs: 1246 platform_device_del(asuspf_device); 1247 1248 fail_platform_device2: 1249 platform_device_put(asuspf_device); 1250 1251 fail_platform_device1: 1252 platform_driver_unregister(&asuspf_driver); 1253 1254 fail_platform_driver: 1255 asus_led_exit(); 1256 1257 fail_led: 1258 asus_backlight_exit(); 1259 1260 fail_backlight: 1261 1262 return result; 1263} 1264 1265module_init(asus_laptop_init); 1266module_exit(asus_laptop_exit); 1267