1 /* 2 * toshiba_acpi.c - Toshiba Laptop ACPI Extras 3 * 4 * 5 * Copyright (C) 2002-2004 John Belmonte 6 * Copyright (C) 2008 Philip Langdale 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 devolpment page for this driver is located at 24 * http://memebeam.org/toys/ToshibaAcpiDriver. 25 * 26 * Credits: 27 * Jonathan A. Buzzard - Toshiba HCI info, and critical tips on reverse 28 * engineering the Windows drivers 29 * Yasushi Nagato - changes for linux kernel 2.4 -> 2.5 30 * Rob Miller - TV out and hotkeys help 31 * 32 * 33 * TODO 34 * 35 */ 36 37 #define TOSHIBA_ACPI_VERSION "0.19" 38 #define PROC_INTERFACE_VERSION 1 39 40 #include <linux/kernel.h> 41 #include <linux/module.h> 42 #include <linux/init.h> 43 #include <linux/types.h> 44 #include <linux/proc_fs.h> 45 #include <linux/backlight.h> 46 #include <linux/platform_device.h> 47 #include <linux/rfkill.h> 48 49 #include <asm/uaccess.h> 50 51 #include <acpi/acpi_drivers.h> 52 53 MODULE_AUTHOR("John Belmonte"); 54 MODULE_DESCRIPTION("Toshiba Laptop ACPI Extras Driver"); 55 MODULE_LICENSE("GPL"); 56 57 #define MY_LOGPREFIX "toshiba_acpi: " 58 #define MY_ERR KERN_ERR MY_LOGPREFIX 59 #define MY_NOTICE KERN_NOTICE MY_LOGPREFIX 60 #define MY_INFO KERN_INFO MY_LOGPREFIX 61 62 /* Toshiba ACPI method paths */ 63 #define METHOD_LCD_BRIGHTNESS "\\_SB_.PCI0.VGA_.LCD_._BCM" 64 #define METHOD_HCI_1 "\\_SB_.VALD.GHCI" 65 #define METHOD_HCI_2 "\\_SB_.VALZ.GHCI" 66 #define METHOD_VIDEO_OUT "\\_SB_.VALX.DSSX" 67 68 /* Toshiba HCI interface definitions 69 * 70 * HCI is Toshiba's "Hardware Control Interface" which is supposed to 71 * be uniform across all their models. Ideally we would just call 72 * dedicated ACPI methods instead of using this primitive interface. 73 * However the ACPI methods seem to be incomplete in some areas (for 74 * example they allow setting, but not reading, the LCD brightness value), 75 * so this is still useful. 76 */ 77 78 #define HCI_WORDS 6 79 80 /* operations */ 81 #define HCI_SET 0xff00 82 #define HCI_GET 0xfe00 83 84 /* return codes */ 85 #define HCI_SUCCESS 0x0000 86 #define HCI_FAILURE 0x1000 87 #define HCI_NOT_SUPPORTED 0x8000 88 #define HCI_EMPTY 0x8c00 89 90 /* registers */ 91 #define HCI_FAN 0x0004 92 #define HCI_SYSTEM_EVENT 0x0016 93 #define HCI_VIDEO_OUT 0x001c 94 #define HCI_HOTKEY_EVENT 0x001e 95 #define HCI_LCD_BRIGHTNESS 0x002a 96 #define HCI_WIRELESS 0x0056 97 98 /* field definitions */ 99 #define HCI_LCD_BRIGHTNESS_BITS 3 100 #define HCI_LCD_BRIGHTNESS_SHIFT (16-HCI_LCD_BRIGHTNESS_BITS) 101 #define HCI_LCD_BRIGHTNESS_LEVELS (1 << HCI_LCD_BRIGHTNESS_BITS) 102 #define HCI_VIDEO_OUT_LCD 0x1 103 #define HCI_VIDEO_OUT_CRT 0x2 104 #define HCI_VIDEO_OUT_TV 0x4 105 #define HCI_WIRELESS_KILL_SWITCH 0x01 106 #define HCI_WIRELESS_BT_PRESENT 0x0f 107 #define HCI_WIRELESS_BT_ATTACH 0x40 108 #define HCI_WIRELESS_BT_POWER 0x80 109 110 static const struct acpi_device_id toshiba_device_ids[] = { 111 {"TOS6200", 0}, 112 {"TOS6208", 0}, 113 {"TOS1900", 0}, 114 {"", 0}, 115 }; 116 MODULE_DEVICE_TABLE(acpi, toshiba_device_ids); 117 118 /* utility 119 */ 120 121 static __inline__ void _set_bit(u32 * word, u32 mask, int value) 122 { 123 *word = (*word & ~mask) | (mask * value); 124 } 125 126 /* acpi interface wrappers 127 */ 128 129 static int is_valid_acpi_path(const char *methodName) 130 { 131 acpi_handle handle; 132 acpi_status status; 133 134 status = acpi_get_handle(NULL, (char *)methodName, &handle); 135 return !ACPI_FAILURE(status); 136 } 137 138 static int write_acpi_int(const char *methodName, int val) 139 { 140 struct acpi_object_list params; 141 union acpi_object in_objs[1]; 142 acpi_status status; 143 144 params.count = ARRAY_SIZE(in_objs); 145 params.pointer = in_objs; 146 in_objs[0].type = ACPI_TYPE_INTEGER; 147 in_objs[0].integer.value = val; 148 149 status = acpi_evaluate_object(NULL, (char *)methodName, ¶ms, NULL); 150 return (status == AE_OK); 151 } 152 153 #if 0 154 static int read_acpi_int(const char *methodName, int *pVal) 155 { 156 struct acpi_buffer results; 157 union acpi_object out_objs[1]; 158 acpi_status status; 159 160 results.length = sizeof(out_objs); 161 results.pointer = out_objs; 162 163 status = acpi_evaluate_object(0, (char *)methodName, 0, &results); 164 *pVal = out_objs[0].integer.value; 165 166 return (status == AE_OK) && (out_objs[0].type == ACPI_TYPE_INTEGER); 167 } 168 #endif 169 170 static const char *method_hci /*= 0*/ ; 171 172 /* Perform a raw HCI call. Here we don't care about input or output buffer 173 * format. 174 */ 175 static acpi_status hci_raw(const u32 in[HCI_WORDS], u32 out[HCI_WORDS]) 176 { 177 struct acpi_object_list params; 178 union acpi_object in_objs[HCI_WORDS]; 179 struct acpi_buffer results; 180 union acpi_object out_objs[HCI_WORDS + 1]; 181 acpi_status status; 182 int i; 183 184 params.count = HCI_WORDS; 185 params.pointer = in_objs; 186 for (i = 0; i < HCI_WORDS; ++i) { 187 in_objs[i].type = ACPI_TYPE_INTEGER; 188 in_objs[i].integer.value = in[i]; 189 } 190 191 results.length = sizeof(out_objs); 192 results.pointer = out_objs; 193 194 status = acpi_evaluate_object(NULL, (char *)method_hci, ¶ms, 195 &results); 196 if ((status == AE_OK) && (out_objs->package.count <= HCI_WORDS)) { 197 for (i = 0; i < out_objs->package.count; ++i) { 198 out[i] = out_objs->package.elements[i].integer.value; 199 } 200 } 201 202 return status; 203 } 204 205 /* common hci tasks (get or set one or two value) 206 * 207 * In addition to the ACPI status, the HCI system returns a result which 208 * may be useful (such as "not supported"). 209 */ 210 211 static acpi_status hci_write1(u32 reg, u32 in1, u32 * result) 212 { 213 u32 in[HCI_WORDS] = { HCI_SET, reg, in1, 0, 0, 0 }; 214 u32 out[HCI_WORDS]; 215 acpi_status status = hci_raw(in, out); 216 *result = (status == AE_OK) ? out[0] : HCI_FAILURE; 217 return status; 218 } 219 220 static acpi_status hci_read1(u32 reg, u32 * out1, u32 * result) 221 { 222 u32 in[HCI_WORDS] = { HCI_GET, reg, 0, 0, 0, 0 }; 223 u32 out[HCI_WORDS]; 224 acpi_status status = hci_raw(in, out); 225 *out1 = out[2]; 226 *result = (status == AE_OK) ? out[0] : HCI_FAILURE; 227 return status; 228 } 229 230 static acpi_status hci_write2(u32 reg, u32 in1, u32 in2, u32 *result) 231 { 232 u32 in[HCI_WORDS] = { HCI_SET, reg, in1, in2, 0, 0 }; 233 u32 out[HCI_WORDS]; 234 acpi_status status = hci_raw(in, out); 235 *result = (status == AE_OK) ? out[0] : HCI_FAILURE; 236 return status; 237 } 238 239 static acpi_status hci_read2(u32 reg, u32 *out1, u32 *out2, u32 *result) 240 { 241 u32 in[HCI_WORDS] = { HCI_GET, reg, *out1, *out2, 0, 0 }; 242 u32 out[HCI_WORDS]; 243 acpi_status status = hci_raw(in, out); 244 *out1 = out[2]; 245 *out2 = out[3]; 246 *result = (status == AE_OK) ? out[0] : HCI_FAILURE; 247 return status; 248 } 249 250 struct toshiba_acpi_dev { 251 struct platform_device *p_dev; 252 struct rfkill *bt_rfk; 253 254 const char *bt_name; 255 256 struct mutex mutex; 257 }; 258 259 static struct toshiba_acpi_dev toshiba_acpi = { 260 .bt_name = "Toshiba Bluetooth", 261 }; 262 263 /* Bluetooth rfkill handlers */ 264 265 static u32 hci_get_bt_present(bool *present) 266 { 267 u32 hci_result; 268 u32 value, value2; 269 270 value = 0; 271 value2 = 0; 272 hci_read2(HCI_WIRELESS, &value, &value2, &hci_result); 273 if (hci_result == HCI_SUCCESS) 274 *present = (value & HCI_WIRELESS_BT_PRESENT) ? true : false; 275 276 return hci_result; 277 } 278 279 static u32 hci_get_radio_state(bool *radio_state) 280 { 281 u32 hci_result; 282 u32 value, value2; 283 284 value = 0; 285 value2 = 0x0001; 286 hci_read2(HCI_WIRELESS, &value, &value2, &hci_result); 287 288 *radio_state = value & HCI_WIRELESS_KILL_SWITCH; 289 return hci_result; 290 } 291 292 static int bt_rfkill_set_block(void *data, bool blocked) 293 { 294 struct toshiba_acpi_dev *dev = data; 295 u32 result1, result2; 296 u32 value; 297 int err; 298 bool radio_state; 299 300 value = (blocked == false); 301 302 mutex_lock(&dev->mutex); 303 if (hci_get_radio_state(&radio_state) != HCI_SUCCESS) { 304 err = -EBUSY; 305 goto out; 306 } 307 308 if (!radio_state) { 309 err = 0; 310 goto out; 311 } 312 313 hci_write2(HCI_WIRELESS, value, HCI_WIRELESS_BT_POWER, &result1); 314 hci_write2(HCI_WIRELESS, value, HCI_WIRELESS_BT_ATTACH, &result2); 315 316 if (result1 != HCI_SUCCESS || result2 != HCI_SUCCESS) 317 err = -EBUSY; 318 else 319 err = 0; 320 out: 321 mutex_unlock(&dev->mutex); 322 return err; 323 } 324 325 static void bt_rfkill_poll(struct rfkill *rfkill, void *data) 326 { 327 bool new_rfk_state; 328 bool value; 329 u32 hci_result; 330 struct toshiba_acpi_dev *dev = data; 331 332 mutex_lock(&dev->mutex); 333 334 hci_result = hci_get_radio_state(&value); 335 if (hci_result != HCI_SUCCESS) { 336 /* Can't do anything useful */ 337 mutex_unlock(&dev->mutex); 338 return; 339 } 340 341 new_rfk_state = value; 342 343 mutex_unlock(&dev->mutex); 344 345 if (rfkill_set_hw_state(rfkill, !new_rfk_state)) 346 bt_rfkill_set_block(data, true); 347 } 348 349 static const struct rfkill_ops toshiba_rfk_ops = { 350 .set_block = bt_rfkill_set_block, 351 .poll = bt_rfkill_poll, 352 }; 353 354 static struct proc_dir_entry *toshiba_proc_dir /*= 0*/ ; 355 static struct backlight_device *toshiba_backlight_device; 356 static int force_fan; 357 static int last_key_event; 358 static int key_event_valid; 359 360 typedef struct _ProcItem { 361 const char *name; 362 char *(*read_func) (char *); 363 unsigned long (*write_func) (const char *, unsigned long); 364 } ProcItem; 365 366 /* proc file handlers 367 */ 368 369 static int 370 dispatch_read(char *page, char **start, off_t off, int count, int *eof, 371 ProcItem * item) 372 { 373 char *p = page; 374 int len; 375 376 if (off == 0) 377 p = item->read_func(p); 378 379 /* ISSUE: I don't understand this code */ 380 len = (p - page); 381 if (len <= off + count) 382 *eof = 1; 383 *start = page + off; 384 len -= off; 385 if (len > count) 386 len = count; 387 if (len < 0) 388 len = 0; 389 return len; 390 } 391 392 static int 393 dispatch_write(struct file *file, const char __user * buffer, 394 unsigned long count, ProcItem * item) 395 { 396 int result; 397 char *tmp_buffer; 398 399 /* Arg buffer points to userspace memory, which can't be accessed 400 * directly. Since we're making a copy, zero-terminate the 401 * destination so that sscanf can be used on it safely. 402 */ 403 tmp_buffer = kmalloc(count + 1, GFP_KERNEL); 404 if (!tmp_buffer) 405 return -ENOMEM; 406 407 if (copy_from_user(tmp_buffer, buffer, count)) { 408 result = -EFAULT; 409 } else { 410 tmp_buffer[count] = 0; 411 result = item->write_func(tmp_buffer, count); 412 } 413 kfree(tmp_buffer); 414 return result; 415 } 416 417 static int get_lcd(struct backlight_device *bd) 418 { 419 u32 hci_result; 420 u32 value; 421 422 hci_read1(HCI_LCD_BRIGHTNESS, &value, &hci_result); 423 if (hci_result == HCI_SUCCESS) { 424 return (value >> HCI_LCD_BRIGHTNESS_SHIFT); 425 } else 426 return -EFAULT; 427 } 428 429 static char *read_lcd(char *p) 430 { 431 int value = get_lcd(NULL); 432 433 if (value >= 0) { 434 p += sprintf(p, "brightness: %d\n", value); 435 p += sprintf(p, "brightness_levels: %d\n", 436 HCI_LCD_BRIGHTNESS_LEVELS); 437 } else { 438 printk(MY_ERR "Error reading LCD brightness\n"); 439 } 440 441 return p; 442 } 443 444 static int set_lcd(int value) 445 { 446 u32 hci_result; 447 448 value = value << HCI_LCD_BRIGHTNESS_SHIFT; 449 hci_write1(HCI_LCD_BRIGHTNESS, value, &hci_result); 450 if (hci_result != HCI_SUCCESS) 451 return -EFAULT; 452 453 return 0; 454 } 455 456 static int set_lcd_status(struct backlight_device *bd) 457 { 458 return set_lcd(bd->props.brightness); 459 } 460 461 static unsigned long write_lcd(const char *buffer, unsigned long count) 462 { 463 int value; 464 int ret; 465 466 if (sscanf(buffer, " brightness : %i", &value) == 1 && 467 value >= 0 && value < HCI_LCD_BRIGHTNESS_LEVELS) { 468 ret = set_lcd(value); 469 if (ret == 0) 470 ret = count; 471 } else { 472 ret = -EINVAL; 473 } 474 return ret; 475 } 476 477 static char *read_video(char *p) 478 { 479 u32 hci_result; 480 u32 value; 481 482 hci_read1(HCI_VIDEO_OUT, &value, &hci_result); 483 if (hci_result == HCI_SUCCESS) { 484 int is_lcd = (value & HCI_VIDEO_OUT_LCD) ? 1 : 0; 485 int is_crt = (value & HCI_VIDEO_OUT_CRT) ? 1 : 0; 486 int is_tv = (value & HCI_VIDEO_OUT_TV) ? 1 : 0; 487 p += sprintf(p, "lcd_out: %d\n", is_lcd); 488 p += sprintf(p, "crt_out: %d\n", is_crt); 489 p += sprintf(p, "tv_out: %d\n", is_tv); 490 } else { 491 printk(MY_ERR "Error reading video out status\n"); 492 } 493 494 return p; 495 } 496 497 static unsigned long write_video(const char *buffer, unsigned long count) 498 { 499 int value; 500 int remain = count; 501 int lcd_out = -1; 502 int crt_out = -1; 503 int tv_out = -1; 504 u32 hci_result; 505 u32 video_out; 506 507 /* scan expression. Multiple expressions may be delimited with ; 508 * 509 * NOTE: to keep scanning simple, invalid fields are ignored 510 */ 511 while (remain) { 512 if (sscanf(buffer, " lcd_out : %i", &value) == 1) 513 lcd_out = value & 1; 514 else if (sscanf(buffer, " crt_out : %i", &value) == 1) 515 crt_out = value & 1; 516 else if (sscanf(buffer, " tv_out : %i", &value) == 1) 517 tv_out = value & 1; 518 /* advance to one character past the next ; */ 519 do { 520 ++buffer; 521 --remain; 522 } 523 while (remain && *(buffer - 1) != ';'); 524 } 525 526 hci_read1(HCI_VIDEO_OUT, &video_out, &hci_result); 527 if (hci_result == HCI_SUCCESS) { 528 unsigned int new_video_out = video_out; 529 if (lcd_out != -1) 530 _set_bit(&new_video_out, HCI_VIDEO_OUT_LCD, lcd_out); 531 if (crt_out != -1) 532 _set_bit(&new_video_out, HCI_VIDEO_OUT_CRT, crt_out); 533 if (tv_out != -1) 534 _set_bit(&new_video_out, HCI_VIDEO_OUT_TV, tv_out); 535 /* To avoid unnecessary video disruption, only write the new 536 * video setting if something changed. */ 537 if (new_video_out != video_out) 538 write_acpi_int(METHOD_VIDEO_OUT, new_video_out); 539 } else { 540 return -EFAULT; 541 } 542 543 return count; 544 } 545 546 static char *read_fan(char *p) 547 { 548 u32 hci_result; 549 u32 value; 550 551 hci_read1(HCI_FAN, &value, &hci_result); 552 if (hci_result == HCI_SUCCESS) { 553 p += sprintf(p, "running: %d\n", (value > 0)); 554 p += sprintf(p, "force_on: %d\n", force_fan); 555 } else { 556 printk(MY_ERR "Error reading fan status\n"); 557 } 558 559 return p; 560 } 561 562 static unsigned long write_fan(const char *buffer, unsigned long count) 563 { 564 int value; 565 u32 hci_result; 566 567 if (sscanf(buffer, " force_on : %i", &value) == 1 && 568 value >= 0 && value <= 1) { 569 hci_write1(HCI_FAN, value, &hci_result); 570 if (hci_result != HCI_SUCCESS) 571 return -EFAULT; 572 else 573 force_fan = value; 574 } else { 575 return -EINVAL; 576 } 577 578 return count; 579 } 580 581 static char *read_keys(char *p) 582 { 583 u32 hci_result; 584 u32 value; 585 586 if (!key_event_valid) { 587 hci_read1(HCI_SYSTEM_EVENT, &value, &hci_result); 588 if (hci_result == HCI_SUCCESS) { 589 key_event_valid = 1; 590 last_key_event = value; 591 } else if (hci_result == HCI_EMPTY) { 592 /* better luck next time */ 593 } else if (hci_result == HCI_NOT_SUPPORTED) { 594 /* This is a workaround for an unresolved issue on 595 * some machines where system events sporadically 596 * become disabled. */ 597 hci_write1(HCI_SYSTEM_EVENT, 1, &hci_result); 598 printk(MY_NOTICE "Re-enabled hotkeys\n"); 599 } else { 600 printk(MY_ERR "Error reading hotkey status\n"); 601 goto end; 602 } 603 } 604 605 p += sprintf(p, "hotkey_ready: %d\n", key_event_valid); 606 p += sprintf(p, "hotkey: 0x%04x\n", last_key_event); 607 608 end: 609 return p; 610 } 611 612 static unsigned long write_keys(const char *buffer, unsigned long count) 613 { 614 int value; 615 616 if (sscanf(buffer, " hotkey_ready : %i", &value) == 1 && value == 0) { 617 key_event_valid = 0; 618 } else { 619 return -EINVAL; 620 } 621 622 return count; 623 } 624 625 static char *read_version(char *p) 626 { 627 p += sprintf(p, "driver: %s\n", TOSHIBA_ACPI_VERSION); 628 p += sprintf(p, "proc_interface: %d\n", 629 PROC_INTERFACE_VERSION); 630 return p; 631 } 632 633 /* proc and module init 634 */ 635 636 #define PROC_TOSHIBA "toshiba" 637 638 static ProcItem proc_items[] = { 639 {"lcd", read_lcd, write_lcd}, 640 {"video", read_video, write_video}, 641 {"fan", read_fan, write_fan}, 642 {"keys", read_keys, write_keys}, 643 {"version", read_version, NULL}, 644 {NULL} 645 }; 646 647 static acpi_status __init add_device(void) 648 { 649 struct proc_dir_entry *proc; 650 ProcItem *item; 651 652 for (item = proc_items; item->name; ++item) { 653 proc = create_proc_read_entry(item->name, 654 S_IFREG | S_IRUGO | S_IWUSR, 655 toshiba_proc_dir, 656 (read_proc_t *) dispatch_read, 657 item); 658 if (proc && item->write_func) 659 proc->write_proc = (write_proc_t *) dispatch_write; 660 } 661 662 return AE_OK; 663 } 664 665 static acpi_status remove_device(void) 666 { 667 ProcItem *item; 668 669 for (item = proc_items; item->name; ++item) 670 remove_proc_entry(item->name, toshiba_proc_dir); 671 return AE_OK; 672 } 673 674 static struct backlight_ops toshiba_backlight_data = { 675 .get_brightness = get_lcd, 676 .update_status = set_lcd_status, 677 }; 678 679 static void toshiba_acpi_exit(void) 680 { 681 if (toshiba_acpi.bt_rfk) { 682 rfkill_unregister(toshiba_acpi.bt_rfk); 683 rfkill_destroy(toshiba_acpi.bt_rfk); 684 } 685 686 if (toshiba_backlight_device) 687 backlight_device_unregister(toshiba_backlight_device); 688 689 remove_device(); 690 691 if (toshiba_proc_dir) 692 remove_proc_entry(PROC_TOSHIBA, acpi_root_dir); 693 694 platform_device_unregister(toshiba_acpi.p_dev); 695 696 return; 697 } 698 699 static int __init toshiba_acpi_init(void) 700 { 701 acpi_status status = AE_OK; 702 u32 hci_result; 703 bool bt_present; 704 int ret = 0; 705 706 if (acpi_disabled) 707 return -ENODEV; 708 709 /* simple device detection: look for HCI method */ 710 if (is_valid_acpi_path(METHOD_HCI_1)) 711 method_hci = METHOD_HCI_1; 712 else if (is_valid_acpi_path(METHOD_HCI_2)) 713 method_hci = METHOD_HCI_2; 714 else 715 return -ENODEV; 716 717 printk(MY_INFO "Toshiba Laptop ACPI Extras version %s\n", 718 TOSHIBA_ACPI_VERSION); 719 printk(MY_INFO " HCI method: %s\n", method_hci); 720 721 mutex_init(&toshiba_acpi.mutex); 722 723 toshiba_acpi.p_dev = platform_device_register_simple("toshiba_acpi", 724 -1, NULL, 0); 725 if (IS_ERR(toshiba_acpi.p_dev)) { 726 ret = PTR_ERR(toshiba_acpi.p_dev); 727 printk(MY_ERR "unable to register platform device\n"); 728 toshiba_acpi.p_dev = NULL; 729 toshiba_acpi_exit(); 730 return ret; 731 } 732 733 force_fan = 0; 734 key_event_valid = 0; 735 736 /* enable event fifo */ 737 hci_write1(HCI_SYSTEM_EVENT, 1, &hci_result); 738 739 toshiba_proc_dir = proc_mkdir(PROC_TOSHIBA, acpi_root_dir); 740 if (!toshiba_proc_dir) { 741 toshiba_acpi_exit(); 742 return -ENODEV; 743 } else { 744 status = add_device(); 745 if (ACPI_FAILURE(status)) { 746 toshiba_acpi_exit(); 747 return -ENODEV; 748 } 749 } 750 751 toshiba_backlight_device = backlight_device_register("toshiba", 752 &toshiba_acpi.p_dev->dev, 753 NULL, 754 &toshiba_backlight_data); 755 if (IS_ERR(toshiba_backlight_device)) { 756 ret = PTR_ERR(toshiba_backlight_device); 757 758 printk(KERN_ERR "Could not register toshiba backlight device\n"); 759 toshiba_backlight_device = NULL; 760 toshiba_acpi_exit(); 761 return ret; 762 } 763 toshiba_backlight_device->props.max_brightness = HCI_LCD_BRIGHTNESS_LEVELS - 1; 764 765 /* Register rfkill switch for Bluetooth */ 766 if (hci_get_bt_present(&bt_present) == HCI_SUCCESS && bt_present) { 767 toshiba_acpi.bt_rfk = rfkill_alloc(toshiba_acpi.bt_name, 768 &toshiba_acpi.p_dev->dev, 769 RFKILL_TYPE_BLUETOOTH, 770 &toshiba_rfk_ops, 771 &toshiba_acpi); 772 if (!toshiba_acpi.bt_rfk) { 773 printk(MY_ERR "unable to allocate rfkill device\n"); 774 toshiba_acpi_exit(); 775 return -ENOMEM; 776 } 777 778 ret = rfkill_register(toshiba_acpi.bt_rfk); 779 if (ret) { 780 printk(MY_ERR "unable to register rfkill device\n"); 781 rfkill_destroy(toshiba_acpi.bt_rfk); 782 toshiba_acpi_exit(); 783 return ret; 784 } 785 } 786 787 return 0; 788 } 789 790 module_init(toshiba_acpi_init); 791 module_exit(toshiba_acpi_exit); 792