1/* 2 * asus_acpi.c - Asus Laptop ACPI Extras 3 * 4 * 5 * Copyright (C) 2002-2005 Julien Lerouge, 2003-2006 Karol Kozimor 6 * 7 * This program is free software; you can redistribute it and/or modify 8 * it under the terms of the GNU General Public License as published by 9 * the Free Software Foundation; either version 2 of the License, or 10 * (at your option) any later version. 11 * 12 * This program is distributed in the hope that it will be useful, 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 * GNU General Public License for more details. 16 * 17 * You should have received a copy of the GNU General Public License 18 * along with this program; if not, write to the Free Software 19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 20 * 21 * 22 * The development page for this driver is located at 23 * http://sourceforge.net/projects/acpi4asus/ 24 * 25 * Credits: 26 * Pontus Fuchs - Helper functions, cleanup 27 * Johann Wiesner - Small compile fixes 28 * John Belmonte - ACPI code for Toshiba laptop was a good starting point. 29 * ���ic Burghard - LED display support for W1N 30 * 31 */ 32 33#include <linux/kernel.h> 34#include <linux/module.h> 35#include <linux/init.h> 36#include <linux/types.h> 37#include <linux/proc_fs.h> 38#include <linux/backlight.h> 39#include <acpi/acpi_drivers.h> 40#include <acpi/acpi_bus.h> 41#include <asm/uaccess.h> 42 43#define ASUS_ACPI_VERSION "0.30" 44 45#define PROC_ASUS "asus" //the directory 46#define PROC_MLED "mled" 47#define PROC_WLED "wled" 48#define PROC_TLED "tled" 49#define PROC_BT "bluetooth" 50#define PROC_LEDD "ledd" 51#define PROC_INFO "info" 52#define PROC_LCD "lcd" 53#define PROC_BRN "brn" 54#define PROC_DISP "disp" 55 56#define ACPI_HOTK_NAME "Asus Laptop ACPI Extras Driver" 57#define ACPI_HOTK_CLASS "hotkey" 58#define ACPI_HOTK_DEVICE_NAME "Hotkey" 59#define ACPI_HOTK_HID "ATK0100" 60 61/* 62 * Some events we use, same for all Asus 63 */ 64#define BR_UP 0x10 65#define BR_DOWN 0x20 66 67/* 68 * Flags for hotk status 69 */ 70#define MLED_ON 0x01 //mail LED 71#define WLED_ON 0x02 //wireless LED 72#define TLED_ON 0x04 //touchpad LED 73#define BT_ON 0x08 //internal Bluetooth 74 75MODULE_AUTHOR("Julien Lerouge, Karol Kozimor"); 76MODULE_DESCRIPTION(ACPI_HOTK_NAME); 77MODULE_LICENSE("GPL"); 78 79static uid_t asus_uid; 80static gid_t asus_gid; 81module_param(asus_uid, uint, 0); 82MODULE_PARM_DESC(asus_uid, "UID for entries in /proc/acpi/asus.\n"); 83module_param(asus_gid, uint, 0); 84MODULE_PARM_DESC(asus_gid, "GID for entries in /proc/acpi/asus.\n"); 85 86/* For each model, all features implemented, 87 * those marked with R are relative to HOTK, A for absolute */ 88struct model_data { 89 char *name; //name of the laptop________________A 90 char *mt_mled; //method to handle mled_____________R 91 char *mled_status; //node to handle mled reading_______A 92 char *mt_wled; //method to handle wled_____________R 93 char *wled_status; //node to handle wled reading_______A 94 char *mt_tled; //method to handle tled_____________R 95 char *tled_status; //node to handle tled reading_______A 96 char *mt_ledd; //method to handle LED display______R 97 char *mt_bt_switch; //method to switch Bluetooth on/off_R 98 char *bt_status; //no model currently supports this__? 99 char *mt_lcd_switch; //method to turn LCD on/off_________A 100 char *lcd_status; //node to read LCD panel state______A 101 char *brightness_up; //method to set brightness up_______A 102 char *brightness_down; //guess what ?______________________A 103 char *brightness_set; //method to set absolute brightness_R 104 char *brightness_get; //method to get absolute brightness_R 105 char *brightness_status; //node to get brightness____________A 106 char *display_set; //method to set video output________R 107 char *display_get; //method to get video output________R 108}; 109 110/* 111 * This is the main structure, we can use it to store anything interesting 112 * about the hotk device 113 */ 114struct asus_hotk { 115 struct acpi_device *device; //the device we are in 116 acpi_handle handle; //the handle of the hotk device 117 char status; //status of the hotk, for LEDs, ... 118 u32 ledd_status; //status of the LED display 119 struct model_data *methods; //methods available on the laptop 120 u8 brightness; //brightness level 121 enum { 122 A1x = 0, //A1340D, A1300F 123 A2x, //A2500H 124 A4G, //A4700G 125 D1x, //D1 126 L2D, //L2000D 127 L3C, //L3800C 128 L3D, //L3400D 129 L3H, //L3H, L2000E, L5D 130 L4R, //L4500R 131 L5x, //L5800C 132 L8L, //L8400L 133 M1A, //M1300A 134 M2E, //M2400E, L4400L 135 M6N, //M6800N, W3400N 136 M6R, //M6700R, A3000G 137 P30, //Samsung P30 138 S1x, //S1300A, but also L1400B and M2400A (L84F) 139 S2x, //S200 (J1 reported), Victor MP-XP7210 140 W1N, //W1000N 141 W5A, //W5A 142 W3V, //W3030V 143 xxN, //M2400N, M3700N, M5200N, M6800N, S1300N, S5200N 144 A4S, //Z81sp 145 //(Centrino) 146 END_MODEL 147 } model; //Models currently supported 148 u16 event_count[128]; //count for each event TODO make this better 149}; 150 151/* Here we go */ 152#define A1x_PREFIX "\\_SB.PCI0.ISA.EC0." 153#define L3C_PREFIX "\\_SB.PCI0.PX40.ECD0." 154#define M1A_PREFIX "\\_SB.PCI0.PX40.EC0." 155#define P30_PREFIX "\\_SB.PCI0.LPCB.EC0." 156#define S1x_PREFIX "\\_SB.PCI0.PX40." 157#define S2x_PREFIX A1x_PREFIX 158#define xxN_PREFIX "\\_SB.PCI0.SBRG.EC0." 159 160static struct model_data model_conf[END_MODEL] = { 161 /* 162 * TODO I have seen a SWBX and AIBX method on some models, like L1400B, 163 * it seems to be a kind of switch, but what for ? 164 */ 165 166 { 167 .name = "A1x", 168 .mt_mled = "MLED", 169 .mled_status = "\\MAIL", 170 .mt_lcd_switch = A1x_PREFIX "_Q10", 171 .lcd_status = "\\BKLI", 172 .brightness_up = A1x_PREFIX "_Q0E", 173 .brightness_down = A1x_PREFIX "_Q0F"}, 174 175 { 176 .name = "A2x", 177 .mt_mled = "MLED", 178 .mt_wled = "WLED", 179 .wled_status = "\\SG66", 180 .mt_lcd_switch = "\\Q10", 181 .lcd_status = "\\BAOF", 182 .brightness_set = "SPLV", 183 .brightness_get = "GPLV", 184 .display_set = "SDSP", 185 .display_get = "\\INFB"}, 186 187 { 188 .name = "A4G", 189 .mt_mled = "MLED", 190/* WLED present, but not controlled by ACPI */ 191 .mt_lcd_switch = xxN_PREFIX "_Q10", 192 .brightness_set = "SPLV", 193 .brightness_get = "GPLV", 194 .display_set = "SDSP", 195 .display_get = "\\ADVG"}, 196 197 { 198 .name = "D1x", 199 .mt_mled = "MLED", 200 .mt_lcd_switch = "\\Q0D", 201 .lcd_status = "\\GP11", 202 .brightness_up = "\\Q0C", 203 .brightness_down = "\\Q0B", 204 .brightness_status = "\\BLVL", 205 .display_set = "SDSP", 206 .display_get = "\\INFB"}, 207 208 { 209 .name = "L2D", 210 .mt_mled = "MLED", 211 .mled_status = "\\SGP6", 212 .mt_wled = "WLED", 213 .wled_status = "\\RCP3", 214 .mt_lcd_switch = "\\Q10", 215 .lcd_status = "\\SGP0", 216 .brightness_up = "\\Q0E", 217 .brightness_down = "\\Q0F", 218 .display_set = "SDSP", 219 .display_get = "\\INFB"}, 220 221 { 222 .name = "L3C", 223 .mt_mled = "MLED", 224 .mt_wled = "WLED", 225 .mt_lcd_switch = L3C_PREFIX "_Q10", 226 .lcd_status = "\\GL32", 227 .brightness_set = "SPLV", 228 .brightness_get = "GPLV", 229 .display_set = "SDSP", 230 .display_get = "\\_SB.PCI0.PCI1.VGAC.NMAP"}, 231 232 { 233 .name = "L3D", 234 .mt_mled = "MLED", 235 .mled_status = "\\MALD", 236 .mt_wled = "WLED", 237 .mt_lcd_switch = "\\Q10", 238 .lcd_status = "\\BKLG", 239 .brightness_set = "SPLV", 240 .brightness_get = "GPLV", 241 .display_set = "SDSP", 242 .display_get = "\\INFB"}, 243 244 { 245 .name = "L3H", 246 .mt_mled = "MLED", 247 .mt_wled = "WLED", 248 .mt_lcd_switch = "EHK", 249 .lcd_status = "\\_SB.PCI0.PM.PBC", 250 .brightness_set = "SPLV", 251 .brightness_get = "GPLV", 252 .display_set = "SDSP", 253 .display_get = "\\INFB"}, 254 255 { 256 .name = "L4R", 257 .mt_mled = "MLED", 258 .mt_wled = "WLED", 259 .wled_status = "\\_SB.PCI0.SBRG.SG13", 260 .mt_lcd_switch = xxN_PREFIX "_Q10", 261 .lcd_status = "\\_SB.PCI0.SBSM.SEO4", 262 .brightness_set = "SPLV", 263 .brightness_get = "GPLV", 264 .display_set = "SDSP", 265 .display_get = "\\_SB.PCI0.P0P1.VGA.GETD"}, 266 267 { 268 .name = "L5x", 269 .mt_mled = "MLED", 270/* WLED present, but not controlled by ACPI */ 271 .mt_tled = "TLED", 272 .mt_lcd_switch = "\\Q0D", 273 .lcd_status = "\\BAOF", 274 .brightness_set = "SPLV", 275 .brightness_get = "GPLV", 276 .display_set = "SDSP", 277 .display_get = "\\INFB"}, 278 279 { 280 .name = "L8L" 281/* No features, but at least support the hotkeys */ 282 }, 283 284 { 285 .name = "M1A", 286 .mt_mled = "MLED", 287 .mt_lcd_switch = M1A_PREFIX "Q10", 288 .lcd_status = "\\PNOF", 289 .brightness_up = M1A_PREFIX "Q0E", 290 .brightness_down = M1A_PREFIX "Q0F", 291 .brightness_status = "\\BRIT", 292 .display_set = "SDSP", 293 .display_get = "\\INFB"}, 294 295 { 296 .name = "M2E", 297 .mt_mled = "MLED", 298 .mt_wled = "WLED", 299 .mt_lcd_switch = "\\Q10", 300 .lcd_status = "\\GP06", 301 .brightness_set = "SPLV", 302 .brightness_get = "GPLV", 303 .display_set = "SDSP", 304 .display_get = "\\INFB"}, 305 306 { 307 .name = "M6N", 308 .mt_mled = "MLED", 309 .mt_wled = "WLED", 310 .wled_status = "\\_SB.PCI0.SBRG.SG13", 311 .mt_lcd_switch = xxN_PREFIX "_Q10", 312 .lcd_status = "\\_SB.BKLT", 313 .brightness_set = "SPLV", 314 .brightness_get = "GPLV", 315 .display_set = "SDSP", 316 .display_get = "\\SSTE"}, 317 318 { 319 .name = "M6R", 320 .mt_mled = "MLED", 321 .mt_wled = "WLED", 322 .mt_lcd_switch = xxN_PREFIX "_Q10", 323 .lcd_status = "\\_SB.PCI0.SBSM.SEO4", 324 .brightness_set = "SPLV", 325 .brightness_get = "GPLV", 326 .display_set = "SDSP", 327 .display_get = "\\_SB.PCI0.P0P1.VGA.GETD"}, 328 329 { 330 .name = "P30", 331 .mt_wled = "WLED", 332 .mt_lcd_switch = P30_PREFIX "_Q0E", 333 .lcd_status = "\\BKLT", 334 .brightness_up = P30_PREFIX "_Q68", 335 .brightness_down = P30_PREFIX "_Q69", 336 .brightness_get = "GPLV", 337 .display_set = "SDSP", 338 .display_get = "\\DNXT"}, 339 340 { 341 .name = "S1x", 342 .mt_mled = "MLED", 343 .mled_status = "\\EMLE", 344 .mt_wled = "WLED", 345 .mt_lcd_switch = S1x_PREFIX "Q10", 346 .lcd_status = "\\PNOF", 347 .brightness_set = "SPLV", 348 .brightness_get = "GPLV"}, 349 350 { 351 .name = "S2x", 352 .mt_mled = "MLED", 353 .mled_status = "\\MAIL", 354 .mt_lcd_switch = S2x_PREFIX "_Q10", 355 .lcd_status = "\\BKLI", 356 .brightness_up = S2x_PREFIX "_Q0B", 357 .brightness_down = S2x_PREFIX "_Q0A"}, 358 359 { 360 .name = "W1N", 361 .mt_mled = "MLED", 362 .mt_wled = "WLED", 363 .mt_ledd = "SLCM", 364 .mt_lcd_switch = xxN_PREFIX "_Q10", 365 .lcd_status = "\\BKLT", 366 .brightness_set = "SPLV", 367 .brightness_get = "GPLV", 368 .display_set = "SDSP", 369 .display_get = "\\ADVG"}, 370 371 { 372 .name = "W5A", 373 .mt_bt_switch = "BLED", 374 .mt_wled = "WLED", 375 .mt_lcd_switch = xxN_PREFIX "_Q10", 376 .brightness_set = "SPLV", 377 .brightness_get = "GPLV", 378 .display_set = "SDSP", 379 .display_get = "\\ADVG"}, 380 381 { 382 .name = "W3V", 383 .mt_mled = "MLED", 384 .mt_wled = "WLED", 385 .mt_lcd_switch = xxN_PREFIX "_Q10", 386 .lcd_status = "\\BKLT", 387 .brightness_set = "SPLV", 388 .brightness_get = "GPLV", 389 .display_set = "SDSP", 390 .display_get = "\\INFB"}, 391 392 { 393 .name = "xxN", 394 .mt_mled = "MLED", 395/* WLED present, but not controlled by ACPI */ 396 .mt_lcd_switch = xxN_PREFIX "_Q10", 397 .lcd_status = "\\BKLT", 398 .brightness_set = "SPLV", 399 .brightness_get = "GPLV", 400 .display_set = "SDSP", 401 .display_get = "\\ADVG"}, 402 403 { 404 .name = "A4S", 405 .brightness_set = "SPLV", 406 .brightness_get = "GPLV", 407 .mt_bt_switch = "BLED", 408 .mt_wled = "WLED" 409 } 410 411}; 412 413/* procdir we use */ 414static struct proc_dir_entry *asus_proc_dir; 415 416static struct backlight_device *asus_backlight_device; 417 418/* 419 * This header is made available to allow proper configuration given model, 420 * revision number , ... this info cannot go in struct asus_hotk because it is 421 * available before the hotk 422 */ 423static struct acpi_table_header *asus_info; 424 425/* The actual device the driver binds to */ 426static struct asus_hotk *hotk; 427 428/* 429 * The hotkey driver declaration 430 */ 431static int asus_hotk_add(struct acpi_device *device); 432static int asus_hotk_remove(struct acpi_device *device, int type); 433static struct acpi_driver asus_hotk_driver = { 434 .name = "asus_acpi", 435 .class = ACPI_HOTK_CLASS, 436 .ids = ACPI_HOTK_HID, 437 .ops = { 438 .add = asus_hotk_add, 439 .remove = asus_hotk_remove, 440 }, 441}; 442 443/* 444 * This function evaluates an ACPI method, given an int as parameter, the 445 * method is searched within the scope of the handle, can be NULL. The output 446 * of the method is written is output, which can also be NULL 447 * 448 * returns 1 if write is successful, 0 else. 449 */ 450static int write_acpi_int(acpi_handle handle, const char *method, int val, 451 struct acpi_buffer *output) 452{ 453 struct acpi_object_list params; //list of input parameters (an int here) 454 union acpi_object in_obj; //the only param we use 455 acpi_status status; 456 457 params.count = 1; 458 params.pointer = &in_obj; 459 in_obj.type = ACPI_TYPE_INTEGER; 460 in_obj.integer.value = val; 461 462 status = acpi_evaluate_object(handle, (char *)method, ¶ms, output); 463 return (status == AE_OK); 464} 465 466static int read_acpi_int(acpi_handle handle, const char *method, int *val) 467{ 468 struct acpi_buffer output; 469 union acpi_object out_obj; 470 acpi_status status; 471 472 output.length = sizeof(out_obj); 473 output.pointer = &out_obj; 474 475 status = acpi_evaluate_object(handle, (char *)method, NULL, &output); 476 *val = out_obj.integer.value; 477 return (status == AE_OK) && (out_obj.type == ACPI_TYPE_INTEGER); 478} 479 480/* 481 * We write our info in page, we begin at offset off and cannot write more 482 * than count bytes. We set eof to 1 if we handle those 2 values. We return the 483 * number of bytes written in page 484 */ 485static int 486proc_read_info(char *page, char **start, off_t off, int count, int *eof, 487 void *data) 488{ 489 int len = 0; 490 int temp; 491 char buf[16]; //enough for all info 492 /* 493 * We use the easy way, we don't care of off and count, so we don't set eof 494 * to 1 495 */ 496 497 len += sprintf(page, ACPI_HOTK_NAME " " ASUS_ACPI_VERSION "\n"); 498 len += sprintf(page + len, "Model reference : %s\n", 499 hotk->methods->name); 500 /* 501 * The SFUN method probably allows the original driver to get the list 502 * of features supported by a given model. For now, 0x0100 or 0x0800 503 * bit signifies that the laptop is equipped with a Wi-Fi MiniPCI card. 504 * The significance of others is yet to be found. 505 */ 506 if (read_acpi_int(hotk->handle, "SFUN", &temp)) 507 len += 508 sprintf(page + len, "SFUN value : 0x%04x\n", temp); 509 /* 510 * Another value for userspace: the ASYM method returns 0x02 for 511 * battery low and 0x04 for battery critical, its readings tend to be 512 * more accurate than those provided by _BST. 513 * Note: since not all the laptops provide this method, errors are 514 * silently ignored. 515 */ 516 if (read_acpi_int(hotk->handle, "ASYM", &temp)) 517 len += 518 sprintf(page + len, "ASYM value : 0x%04x\n", temp); 519 if (asus_info) { 520 snprintf(buf, 16, "%d", asus_info->length); 521 len += sprintf(page + len, "DSDT length : %s\n", buf); 522 snprintf(buf, 16, "%d", asus_info->checksum); 523 len += sprintf(page + len, "DSDT checksum : %s\n", buf); 524 snprintf(buf, 16, "%d", asus_info->revision); 525 len += sprintf(page + len, "DSDT revision : %s\n", buf); 526 snprintf(buf, 7, "%s", asus_info->oem_id); 527 len += sprintf(page + len, "OEM id : %s\n", buf); 528 snprintf(buf, 9, "%s", asus_info->oem_table_id); 529 len += sprintf(page + len, "OEM table id : %s\n", buf); 530 snprintf(buf, 16, "%x", asus_info->oem_revision); 531 len += sprintf(page + len, "OEM revision : 0x%s\n", buf); 532 snprintf(buf, 5, "%s", asus_info->asl_compiler_id); 533 len += sprintf(page + len, "ASL comp vendor id : %s\n", buf); 534 snprintf(buf, 16, "%x", asus_info->asl_compiler_revision); 535 len += sprintf(page + len, "ASL comp revision : 0x%s\n", buf); 536 } 537 538 return len; 539} 540 541/* 542 * /proc handlers 543 * We write our info in page, we begin at offset off and cannot write more 544 * than count bytes. We set eof to 1 if we handle those 2 values. We return the 545 * number of bytes written in page 546 */ 547 548/* Generic LED functions */ 549static int read_led(const char *ledname, int ledmask) 550{ 551 if (ledname) { 552 int led_status; 553 554 if (read_acpi_int(NULL, ledname, &led_status)) 555 return led_status; 556 else 557 printk(KERN_WARNING "Asus ACPI: Error reading LED " 558 "status\n"); 559 } 560 return (hotk->status & ledmask) ? 1 : 0; 561} 562 563static int parse_arg(const char __user * buf, unsigned long count, int *val) 564{ 565 char s[32]; 566 if (!count) 567 return 0; 568 if (count > 31) 569 return -EINVAL; 570 if (copy_from_user(s, buf, count)) 571 return -EFAULT; 572 s[count] = 0; 573 if (sscanf(s, "%i", val) != 1) 574 return -EINVAL; 575 return count; 576} 577 578static int 579write_led(const char __user * buffer, unsigned long count, 580 char *ledname, int ledmask, int invert) 581{ 582 int rv, value; 583 int led_out = 0; 584 585 rv = parse_arg(buffer, count, &value); 586 if (rv > 0) 587 led_out = value ? 1 : 0; 588 589 hotk->status = 590 (led_out) ? (hotk->status | ledmask) : (hotk->status & ~ledmask); 591 592 if (invert) /* invert target value */ 593 led_out = !led_out & 0x1; 594 595 if (!write_acpi_int(hotk->handle, ledname, led_out, NULL)) 596 printk(KERN_WARNING "Asus ACPI: LED (%s) write failed\n", 597 ledname); 598 599 return rv; 600} 601 602/* 603 * Proc handlers for MLED 604 */ 605static int 606proc_read_mled(char *page, char **start, off_t off, int count, int *eof, 607 void *data) 608{ 609 return sprintf(page, "%d\n", 610 read_led(hotk->methods->mled_status, MLED_ON)); 611} 612 613static int 614proc_write_mled(struct file *file, const char __user * buffer, 615 unsigned long count, void *data) 616{ 617 return write_led(buffer, count, hotk->methods->mt_mled, MLED_ON, 1); 618} 619 620/* 621 * Proc handlers for LED display 622 */ 623static int 624proc_read_ledd(char *page, char **start, off_t off, int count, int *eof, 625 void *data) 626{ 627 return sprintf(page, "0x%08x\n", hotk->ledd_status); 628} 629 630static int 631proc_write_ledd(struct file *file, const char __user * buffer, 632 unsigned long count, void *data) 633{ 634 int rv, value; 635 636 rv = parse_arg(buffer, count, &value); 637 if (rv > 0) { 638 if (!write_acpi_int 639 (hotk->handle, hotk->methods->mt_ledd, value, NULL)) 640 printk(KERN_WARNING 641 "Asus ACPI: LED display write failed\n"); 642 else 643 hotk->ledd_status = (u32) value; 644 } 645 return rv; 646} 647 648/* 649 * Proc handlers for WLED 650 */ 651static int 652proc_read_wled(char *page, char **start, off_t off, int count, int *eof, 653 void *data) 654{ 655 return sprintf(page, "%d\n", 656 read_led(hotk->methods->wled_status, WLED_ON)); 657} 658 659static int 660proc_write_wled(struct file *file, const char __user * buffer, 661 unsigned long count, void *data) 662{ 663 return write_led(buffer, count, hotk->methods->mt_wled, WLED_ON, 0); 664} 665 666/* 667 * Proc handlers for Bluetooth 668 */ 669static int 670proc_read_bluetooth(char *page, char **start, off_t off, int count, int *eof, 671 void *data) 672{ 673 return sprintf(page, "%d\n", read_led(hotk->methods->bt_status, BT_ON)); 674} 675 676static int 677proc_write_bluetooth(struct file *file, const char __user * buffer, 678 unsigned long count, void *data) 679{ 680 /* Note: mt_bt_switch controls both internal Bluetooth adapter's 681 presence and its LED */ 682 return write_led(buffer, count, hotk->methods->mt_bt_switch, BT_ON, 0); 683} 684 685/* 686 * Proc handlers for TLED 687 */ 688static int 689proc_read_tled(char *page, char **start, off_t off, int count, int *eof, 690 void *data) 691{ 692 return sprintf(page, "%d\n", 693 read_led(hotk->methods->tled_status, TLED_ON)); 694} 695 696static int 697proc_write_tled(struct file *file, const char __user * buffer, 698 unsigned long count, void *data) 699{ 700 return write_led(buffer, count, hotk->methods->mt_tled, TLED_ON, 0); 701} 702 703static int get_lcd_state(void) 704{ 705 int lcd = 0; 706 707 if (hotk->model != L3H) { 708 /* We don't have to check anything if we are here */ 709 if (!read_acpi_int(NULL, hotk->methods->lcd_status, &lcd)) 710 printk(KERN_WARNING 711 "Asus ACPI: Error reading LCD status\n"); 712 713 if (hotk->model == L2D) 714 lcd = ~lcd; 715 } else { /* L3H and the like have to be handled differently */ 716 acpi_status status = 0; 717 struct acpi_object_list input; 718 union acpi_object mt_params[2]; 719 struct acpi_buffer output; 720 union acpi_object out_obj; 721 722 input.count = 2; 723 input.pointer = mt_params; 724 /* Note: the following values are partly guessed up, but 725 otherwise they seem to work */ 726 mt_params[0].type = ACPI_TYPE_INTEGER; 727 mt_params[0].integer.value = 0x02; 728 mt_params[1].type = ACPI_TYPE_INTEGER; 729 mt_params[1].integer.value = 0x02; 730 731 output.length = sizeof(out_obj); 732 output.pointer = &out_obj; 733 734 status = 735 acpi_evaluate_object(NULL, hotk->methods->lcd_status, 736 &input, &output); 737 if (status != AE_OK) 738 return -1; 739 if (out_obj.type == ACPI_TYPE_INTEGER) 740 /* That's what the AML code does */ 741 lcd = out_obj.integer.value >> 8; 742 } 743 744 return (lcd & 1); 745} 746 747static int set_lcd_state(int value) 748{ 749 int lcd = 0; 750 acpi_status status = 0; 751 752 lcd = value ? 1 : 0; 753 if (lcd != get_lcd_state()) { 754 /* switch */ 755 if (hotk->model != L3H) { 756 status = 757 acpi_evaluate_object(NULL, 758 hotk->methods->mt_lcd_switch, 759 NULL, NULL); 760 } else { /* L3H and the like have to be handled differently */ 761 if (!write_acpi_int 762 (hotk->handle, hotk->methods->mt_lcd_switch, 0x07, 763 NULL)) 764 status = AE_ERROR; 765 /* L3H's AML executes EHK (0x07) upon Fn+F7 keypress, 766 the exact behaviour is simulated here */ 767 } 768 if (ACPI_FAILURE(status)) 769 printk(KERN_WARNING "Asus ACPI: Error switching LCD\n"); 770 } 771 return 0; 772 773} 774 775static int 776proc_read_lcd(char *page, char **start, off_t off, int count, int *eof, 777 void *data) 778{ 779 return sprintf(page, "%d\n", get_lcd_state()); 780} 781 782static int 783proc_write_lcd(struct file *file, const char __user * buffer, 784 unsigned long count, void *data) 785{ 786 int rv, value; 787 788 rv = parse_arg(buffer, count, &value); 789 if (rv > 0) 790 set_lcd_state(value); 791 return rv; 792} 793 794static int read_brightness(struct backlight_device *bd) 795{ 796 int value; 797 798 if (hotk->methods->brightness_get) { /* SPLV/GPLV laptop */ 799 if (!read_acpi_int(hotk->handle, hotk->methods->brightness_get, 800 &value)) 801 printk(KERN_WARNING 802 "Asus ACPI: Error reading brightness\n"); 803 } else if (hotk->methods->brightness_status) { /* For D1 for example */ 804 if (!read_acpi_int(NULL, hotk->methods->brightness_status, 805 &value)) 806 printk(KERN_WARNING 807 "Asus ACPI: Error reading brightness\n"); 808 } else /* No GPLV method */ 809 value = hotk->brightness; 810 return value; 811} 812 813/* 814 * Change the brightness level 815 */ 816static int set_brightness(int value) 817{ 818 acpi_status status = 0; 819 int ret = 0; 820 821 /* SPLV laptop */ 822 if (hotk->methods->brightness_set) { 823 if (!write_acpi_int(hotk->handle, hotk->methods->brightness_set, 824 value, NULL)) 825 printk(KERN_WARNING 826 "Asus ACPI: Error changing brightness\n"); 827 ret = -EIO; 828 goto out; 829 } 830 831 /* No SPLV method if we are here, act as appropriate */ 832 value -= read_brightness(NULL); 833 while (value != 0) { 834 status = acpi_evaluate_object(NULL, (value > 0) ? 835 hotk->methods->brightness_up : 836 hotk->methods->brightness_down, 837 NULL, NULL); 838 (value > 0) ? value-- : value++; 839 if (ACPI_FAILURE(status)) 840 printk(KERN_WARNING 841 "Asus ACPI: Error changing brightness\n"); 842 ret = -EIO; 843 } 844out: 845 return ret; 846} 847 848static int set_brightness_status(struct backlight_device *bd) 849{ 850 return set_brightness(bd->props.brightness); 851} 852 853static int 854proc_read_brn(char *page, char **start, off_t off, int count, int *eof, 855 void *data) 856{ 857 return sprintf(page, "%d\n", read_brightness(NULL)); 858} 859 860static int 861proc_write_brn(struct file *file, const char __user * buffer, 862 unsigned long count, void *data) 863{ 864 int rv, value; 865 866 rv = parse_arg(buffer, count, &value); 867 if (rv > 0) { 868 value = (0 < value) ? ((15 < value) ? 15 : value) : 0; 869 /* 0 <= value <= 15 */ 870 set_brightness(value); 871 } 872 return rv; 873} 874 875static void set_display(int value) 876{ 877 /* no sanity check needed for now */ 878 if (!write_acpi_int(hotk->handle, hotk->methods->display_set, 879 value, NULL)) 880 printk(KERN_WARNING "Asus ACPI: Error setting display\n"); 881 return; 882} 883 884/* 885 * Now, *this* one could be more user-friendly, but so far, no-one has 886 * complained. The significance of bits is the same as in proc_write_disp() 887 */ 888static int 889proc_read_disp(char *page, char **start, off_t off, int count, int *eof, 890 void *data) 891{ 892 int value = 0; 893 894 if (!read_acpi_int(hotk->handle, hotk->methods->display_get, &value)) 895 printk(KERN_WARNING 896 "Asus ACPI: Error reading display status\n"); 897 value &= 0x07; /* needed for some models, shouldn't hurt others */ 898 return sprintf(page, "%d\n", value); 899} 900 901/* 902 * Experimental support for display switching. As of now: 1 should activate 903 * the LCD output, 2 should do for CRT, and 4 for TV-Out. Any combination 904 * (bitwise) of these will suffice. I never actually tested 3 displays hooked up 905 * simultaneously, so be warned. See the acpi4asus README for more info. 906 */ 907static int 908proc_write_disp(struct file *file, const char __user * buffer, 909 unsigned long count, void *data) 910{ 911 int rv, value; 912 913 rv = parse_arg(buffer, count, &value); 914 if (rv > 0) 915 set_display(value); 916 return rv; 917} 918 919typedef int (proc_readfunc) (char *page, char **start, off_t off, int count, 920 int *eof, void *data); 921typedef int (proc_writefunc) (struct file * file, const char __user * buffer, 922 unsigned long count, void *data); 923 924static int 925asus_proc_add(char *name, proc_writefunc * writefunc, 926 proc_readfunc * readfunc, mode_t mode, 927 struct acpi_device *device) 928{ 929 struct proc_dir_entry *proc = 930 create_proc_entry(name, mode, acpi_device_dir(device)); 931 if (!proc) { 932 printk(KERN_WARNING " Unable to create %s fs entry\n", name); 933 return -1; 934 } 935 proc->write_proc = writefunc; 936 proc->read_proc = readfunc; 937 proc->data = acpi_driver_data(device); 938 proc->owner = THIS_MODULE; 939 proc->uid = asus_uid; 940 proc->gid = asus_gid; 941 return 0; 942} 943 944static int asus_hotk_add_fs(struct acpi_device *device) 945{ 946 struct proc_dir_entry *proc; 947 mode_t mode; 948 949 /* 950 * If parameter uid or gid is not changed, keep the default setting for 951 * our proc entries (-rw-rw-rw-) else, it means we care about security, 952 * and then set to -rw-rw---- 953 */ 954 955 if ((asus_uid == 0) && (asus_gid == 0)) { 956 mode = S_IFREG | S_IRUGO | S_IWUGO; 957 } else { 958 mode = S_IFREG | S_IRUSR | S_IRGRP | S_IWUSR | S_IWGRP; 959 printk(KERN_WARNING " asus_uid and asus_gid parameters are " 960 "deprecated, use chown and chmod instead!\n"); 961 } 962 963 acpi_device_dir(device) = asus_proc_dir; 964 if (!acpi_device_dir(device)) 965 return -ENODEV; 966 967 proc = create_proc_entry(PROC_INFO, mode, acpi_device_dir(device)); 968 if (proc) { 969 proc->read_proc = proc_read_info; 970 proc->data = acpi_driver_data(device); 971 proc->owner = THIS_MODULE; 972 proc->uid = asus_uid; 973 proc->gid = asus_gid; 974 } else { 975 printk(KERN_WARNING " Unable to create " PROC_INFO 976 " fs entry\n"); 977 } 978 979 if (hotk->methods->mt_wled) { 980 asus_proc_add(PROC_WLED, &proc_write_wled, &proc_read_wled, 981 mode, device); 982 } 983 984 if (hotk->methods->mt_ledd) { 985 asus_proc_add(PROC_LEDD, &proc_write_ledd, &proc_read_ledd, 986 mode, device); 987 } 988 989 if (hotk->methods->mt_mled) { 990 asus_proc_add(PROC_MLED, &proc_write_mled, &proc_read_mled, 991 mode, device); 992 } 993 994 if (hotk->methods->mt_tled) { 995 asus_proc_add(PROC_TLED, &proc_write_tled, &proc_read_tled, 996 mode, device); 997 } 998 999 if (hotk->methods->mt_bt_switch) { 1000 asus_proc_add(PROC_BT, &proc_write_bluetooth, 1001 &proc_read_bluetooth, mode, device); 1002 } 1003 1004 /* 1005 * We need both read node and write method as LCD switch is also accessible 1006 * from keyboard 1007 */ 1008 if (hotk->methods->mt_lcd_switch && hotk->methods->lcd_status) { 1009 asus_proc_add(PROC_LCD, &proc_write_lcd, &proc_read_lcd, mode, 1010 device); 1011 } 1012 1013 if ((hotk->methods->brightness_up && hotk->methods->brightness_down) || 1014 (hotk->methods->brightness_get && hotk->methods->brightness_set)) { 1015 asus_proc_add(PROC_BRN, &proc_write_brn, &proc_read_brn, mode, 1016 device); 1017 } 1018 1019 if (hotk->methods->display_set) { 1020 asus_proc_add(PROC_DISP, &proc_write_disp, &proc_read_disp, 1021 mode, device); 1022 } 1023 1024 return 0; 1025} 1026 1027static int asus_hotk_remove_fs(struct acpi_device *device) 1028{ 1029 if (acpi_device_dir(device)) { 1030 remove_proc_entry(PROC_INFO, acpi_device_dir(device)); 1031 if (hotk->methods->mt_wled) 1032 remove_proc_entry(PROC_WLED, acpi_device_dir(device)); 1033 if (hotk->methods->mt_mled) 1034 remove_proc_entry(PROC_MLED, acpi_device_dir(device)); 1035 if (hotk->methods->mt_tled) 1036 remove_proc_entry(PROC_TLED, acpi_device_dir(device)); 1037 if (hotk->methods->mt_ledd) 1038 remove_proc_entry(PROC_LEDD, acpi_device_dir(device)); 1039 if (hotk->methods->mt_bt_switch) 1040 remove_proc_entry(PROC_BT, acpi_device_dir(device)); 1041 if (hotk->methods->mt_lcd_switch && hotk->methods->lcd_status) 1042 remove_proc_entry(PROC_LCD, acpi_device_dir(device)); 1043 if ((hotk->methods->brightness_up 1044 && hotk->methods->brightness_down) 1045 || (hotk->methods->brightness_get 1046 && hotk->methods->brightness_set)) 1047 remove_proc_entry(PROC_BRN, acpi_device_dir(device)); 1048 if (hotk->methods->display_set) 1049 remove_proc_entry(PROC_DISP, acpi_device_dir(device)); 1050 } 1051 return 0; 1052} 1053 1054static void asus_hotk_notify(acpi_handle handle, u32 event, void *data) 1055{ 1056 /* TODO Find a better way to handle events count. */ 1057 if (!hotk) 1058 return; 1059 1060 if ((event & ~((u32) BR_UP)) < 16) { 1061 hotk->brightness = (event & ~((u32) BR_UP)); 1062 } else if ((event & ~((u32) BR_DOWN)) < 16) { 1063 hotk->brightness = (event & ~((u32) BR_DOWN)); 1064 } 1065 1066 acpi_bus_generate_event(hotk->device, event, 1067 hotk->event_count[event % 128]++); 1068 1069 return; 1070} 1071 1072/* 1073 * Match the model string to the list of supported models. Return END_MODEL if 1074 * no match or model is NULL. 1075 */ 1076static int asus_model_match(char *model) 1077{ 1078 if (model == NULL) 1079 return END_MODEL; 1080 1081 if (strncmp(model, "L3D", 3) == 0) 1082 return L3D; 1083 else if (strncmp(model, "L2E", 3) == 0 || 1084 strncmp(model, "L3H", 3) == 0 || strncmp(model, "L5D", 3) == 0) 1085 return L3H; 1086 else if (strncmp(model, "L3", 2) == 0 || strncmp(model, "L2B", 3) == 0) 1087 return L3C; 1088 else if (strncmp(model, "L8L", 3) == 0) 1089 return L8L; 1090 else if (strncmp(model, "L4R", 3) == 0) 1091 return L4R; 1092 else if (strncmp(model, "M6N", 3) == 0 || strncmp(model, "W3N", 3) == 0) 1093 return M6N; 1094 else if (strncmp(model, "M6R", 3) == 0 || strncmp(model, "A3G", 3) == 0) 1095 return M6R; 1096 else if (strncmp(model, "M2N", 3) == 0 || 1097 strncmp(model, "M3N", 3) == 0 || 1098 strncmp(model, "M5N", 3) == 0 || 1099 strncmp(model, "M6N", 3) == 0 || 1100 strncmp(model, "S1N", 3) == 0 || 1101 strncmp(model, "S5N", 3) == 0 || strncmp(model, "W1N", 3) == 0) 1102 return xxN; 1103 else if (strncmp(model, "M1", 2) == 0) 1104 return M1A; 1105 else if (strncmp(model, "M2", 2) == 0 || strncmp(model, "L4E", 3) == 0) 1106 return M2E; 1107 else if (strncmp(model, "L2", 2) == 0) 1108 return L2D; 1109 else if (strncmp(model, "L8", 2) == 0) 1110 return S1x; 1111 else if (strncmp(model, "D1", 2) == 0) 1112 return D1x; 1113 else if (strncmp(model, "A1", 2) == 0) 1114 return A1x; 1115 else if (strncmp(model, "A2", 2) == 0) 1116 return A2x; 1117 else if (strncmp(model, "J1", 2) == 0) 1118 return S2x; 1119 else if (strncmp(model, "L5", 2) == 0) 1120 return L5x; 1121 else if (strncmp(model, "A4G", 3) == 0) 1122 return A4G; 1123 else if (strncmp(model, "W1N", 3) == 0) 1124 return W1N; 1125 else if (strncmp(model, "W3V", 3) == 0) 1126 return W3V; 1127 else if (strncmp(model, "W5A", 3) == 0) 1128 return W5A; 1129 else if (strncmp(model, "A4S", 3) == 0) 1130 return A4S; 1131 else 1132 return END_MODEL; 1133} 1134 1135/* 1136 * This function is used to initialize the hotk with right values. In this 1137 * method, we can make all the detection we want, and modify the hotk struct 1138 */ 1139static int asus_hotk_get_info(void) 1140{ 1141 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; 1142 union acpi_object *model = NULL; 1143 int bsts_result; 1144 char *string = NULL; 1145 acpi_status status; 1146 1147 /* 1148 * Get DSDT headers early enough to allow for differentiating between 1149 * models, but late enough to allow acpi_bus_register_driver() to fail 1150 * before doing anything ACPI-specific. Should we encounter a machine, 1151 * which needs special handling (i.e. its hotkey device has a different 1152 * HID), this bit will be moved. A global variable asus_info contains 1153 * the DSDT header. 1154 */ 1155 status = acpi_get_table(ACPI_SIG_DSDT, 1, &asus_info); 1156 if (ACPI_FAILURE(status)) 1157 printk(KERN_WARNING " Couldn't get the DSDT table header\n"); 1158 1159 /* We have to write 0 on init this far for all ASUS models */ 1160 if (!write_acpi_int(hotk->handle, "INIT", 0, &buffer)) { 1161 printk(KERN_ERR " Hotkey initialization failed\n"); 1162 return -ENODEV; 1163 } 1164 1165 /* This needs to be called for some laptops to init properly */ 1166 if (!read_acpi_int(hotk->handle, "BSTS", &bsts_result)) 1167 printk(KERN_WARNING " Error calling BSTS\n"); 1168 else if (bsts_result) 1169 printk(KERN_NOTICE " BSTS called, 0x%02x returned\n", 1170 bsts_result); 1171 1172 /* 1173 * Try to match the object returned by INIT to the specific model. 1174 * Handle every possible object (or the lack of thereof) the DSDT 1175 * writers might throw at us. When in trouble, we pass NULL to 1176 * asus_model_match() and try something completely different. 1177 */ 1178 if (buffer.pointer) { 1179 model = buffer.pointer; 1180 switch (model->type) { 1181 case ACPI_TYPE_STRING: 1182 string = model->string.pointer; 1183 break; 1184 case ACPI_TYPE_BUFFER: 1185 string = model->buffer.pointer; 1186 break; 1187 default: 1188 kfree(model); 1189 break; 1190 } 1191 } 1192 hotk->model = asus_model_match(string); 1193 if (hotk->model == END_MODEL) { /* match failed */ 1194 if (asus_info && 1195 strncmp(asus_info->oem_table_id, "ODEM", 4) == 0) { 1196 hotk->model = P30; 1197 printk(KERN_NOTICE 1198 " Samsung P30 detected, supported\n"); 1199 } else { 1200 hotk->model = M2E; 1201 printk(KERN_NOTICE " unsupported model %s, trying " 1202 "default values\n", string); 1203 printk(KERN_NOTICE 1204 " send /proc/acpi/dsdt to the developers\n"); 1205 } 1206 hotk->methods = &model_conf[hotk->model]; 1207 return AE_OK; 1208 } 1209 hotk->methods = &model_conf[hotk->model]; 1210 printk(KERN_NOTICE " %s model detected, supported\n", string); 1211 1212 /* Sort of per-model blacklist */ 1213 if (strncmp(string, "L2B", 3) == 0) 1214 hotk->methods->lcd_status = NULL; 1215 /* L2B is similar enough to L3C to use its settings, with this only 1216 exception */ 1217 else if (strncmp(string, "A3G", 3) == 0) 1218 hotk->methods->lcd_status = "\\BLFG"; 1219 /* A3G is like M6R */ 1220 else if (strncmp(string, "S5N", 3) == 0 || 1221 strncmp(string, "M5N", 3) == 0 || 1222 strncmp(string, "W3N", 3) == 0) 1223 hotk->methods->mt_mled = NULL; 1224 /* S5N, M5N and W3N have no MLED */ 1225 else if (strncmp(string, "L5D", 3) == 0) 1226 hotk->methods->mt_wled = NULL; 1227 /* L5D's WLED is not controlled by ACPI */ 1228 else if (strncmp(string, "M2N", 3) == 0 || 1229 strncmp(string, "W3V", 3) == 0 || 1230 strncmp(string, "S1N", 3) == 0) 1231 hotk->methods->mt_wled = "WLED"; 1232 /* M2N, S1N and W3V have a usable WLED */ 1233 else if (asus_info) { 1234 if (strncmp(asus_info->oem_table_id, "L1", 2) == 0) 1235 hotk->methods->mled_status = NULL; 1236 /* S1300A reports L84F, but L1400B too, account for that */ 1237 } 1238 1239 kfree(model); 1240 1241 return AE_OK; 1242} 1243 1244static int asus_hotk_check(void) 1245{ 1246 int result = 0; 1247 1248 result = acpi_bus_get_status(hotk->device); 1249 if (result) 1250 return result; 1251 1252 if (hotk->device->status.present) { 1253 result = asus_hotk_get_info(); 1254 } else { 1255 printk(KERN_ERR " Hotkey device not present, aborting\n"); 1256 return -EINVAL; 1257 } 1258 1259 return result; 1260} 1261 1262static int asus_hotk_found; 1263 1264static int asus_hotk_add(struct acpi_device *device) 1265{ 1266 acpi_status status = AE_OK; 1267 int result; 1268 1269 if (!device) 1270 return -EINVAL; 1271 1272 printk(KERN_NOTICE "Asus Laptop ACPI Extras version %s\n", 1273 ASUS_ACPI_VERSION); 1274 1275 hotk = kzalloc(sizeof(struct asus_hotk), GFP_KERNEL); 1276 if (!hotk) 1277 return -ENOMEM; 1278 1279 hotk->handle = device->handle; 1280 strcpy(acpi_device_name(device), ACPI_HOTK_DEVICE_NAME); 1281 strcpy(acpi_device_class(device), ACPI_HOTK_CLASS); 1282 acpi_driver_data(device) = hotk; 1283 hotk->device = device; 1284 1285 result = asus_hotk_check(); 1286 if (result) 1287 goto end; 1288 1289 result = asus_hotk_add_fs(device); 1290 if (result) 1291 goto end; 1292 1293 /* 1294 * We install the handler, it will receive the hotk in parameter, so, we 1295 * could add other data to the hotk struct 1296 */ 1297 status = acpi_install_notify_handler(hotk->handle, ACPI_SYSTEM_NOTIFY, 1298 asus_hotk_notify, hotk); 1299 if (ACPI_FAILURE(status)) 1300 printk(KERN_ERR " Error installing notify handler\n"); 1301 1302 /* For laptops without GPLV: init the hotk->brightness value */ 1303 if ((!hotk->methods->brightness_get) 1304 && (!hotk->methods->brightness_status) 1305 && (hotk->methods->brightness_up && hotk->methods->brightness_down)) { 1306 status = 1307 acpi_evaluate_object(NULL, hotk->methods->brightness_down, 1308 NULL, NULL); 1309 if (ACPI_FAILURE(status)) 1310 printk(KERN_WARNING " Error changing brightness\n"); 1311 else { 1312 status = 1313 acpi_evaluate_object(NULL, 1314 hotk->methods->brightness_up, 1315 NULL, NULL); 1316 if (ACPI_FAILURE(status)) 1317 printk(KERN_WARNING " Strange, error changing" 1318 " brightness\n"); 1319 } 1320 } 1321 1322 asus_hotk_found = 1; 1323 1324 /* LED display is off by default */ 1325 hotk->ledd_status = 0xFFF; 1326 1327 end: 1328 if (result) { 1329 kfree(hotk); 1330 } 1331 1332 return result; 1333} 1334 1335static int asus_hotk_remove(struct acpi_device *device, int type) 1336{ 1337 acpi_status status = 0; 1338 1339 if (!device || !acpi_driver_data(device)) 1340 return -EINVAL; 1341 1342 status = acpi_remove_notify_handler(hotk->handle, ACPI_SYSTEM_NOTIFY, 1343 asus_hotk_notify); 1344 if (ACPI_FAILURE(status)) 1345 printk(KERN_ERR "Asus ACPI: Error removing notify handler\n"); 1346 1347 asus_hotk_remove_fs(device); 1348 1349 kfree(hotk); 1350 1351 return 0; 1352} 1353 1354static struct backlight_ops asus_backlight_data = { 1355 .get_brightness = read_brightness, 1356 .update_status = set_brightness_status, 1357}; 1358 1359static void asus_acpi_exit(void) 1360{ 1361 if (asus_backlight_device) 1362 backlight_device_unregister(asus_backlight_device); 1363 1364 acpi_bus_unregister_driver(&asus_hotk_driver); 1365 remove_proc_entry(PROC_ASUS, acpi_root_dir); 1366 1367 return; 1368} 1369 1370static int __init asus_acpi_init(void) 1371{ 1372 int result; 1373 1374 if (acpi_disabled) 1375 return -ENODEV; 1376 1377 asus_proc_dir = proc_mkdir(PROC_ASUS, acpi_root_dir); 1378 if (!asus_proc_dir) { 1379 printk(KERN_ERR "Asus ACPI: Unable to create /proc entry\n"); 1380 return -ENODEV; 1381 } 1382 asus_proc_dir->owner = THIS_MODULE; 1383 1384 result = acpi_bus_register_driver(&asus_hotk_driver); 1385 if (result < 0) { 1386 remove_proc_entry(PROC_ASUS, acpi_root_dir); 1387 return result; 1388 } 1389 1390 /* 1391 * This is a bit of a kludge. We only want this module loaded 1392 * for ASUS systems, but there's currently no way to probe the 1393 * ACPI namespace for ASUS HIDs. So we just return failure if 1394 * we didn't find one, which will cause the module to be 1395 * unloaded. 1396 */ 1397 if (!asus_hotk_found) { 1398 acpi_bus_unregister_driver(&asus_hotk_driver); 1399 remove_proc_entry(PROC_ASUS, acpi_root_dir); 1400 return -ENODEV; 1401 } 1402 1403 asus_backlight_device = backlight_device_register("asus",NULL,NULL, 1404 &asus_backlight_data); 1405 if (IS_ERR(asus_backlight_device)) { 1406 printk(KERN_ERR "Could not register asus backlight device\n"); 1407 asus_backlight_device = NULL; 1408 asus_acpi_exit(); 1409 return -ENODEV; 1410 } 1411 asus_backlight_device->props.max_brightness = 15; 1412 1413 return 0; 1414} 1415 1416module_init(asus_acpi_init); 1417module_exit(asus_acpi_exit); 1418