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/seq_file.h> 46 #include <linux/backlight.h> 47 #include <linux/platform_device.h> 48 #include <linux/rfkill.h> 49 50 #include <asm/uaccess.h> 51 52 #include <acpi/acpi_drivers.h> 53 54 MODULE_AUTHOR("John Belmonte"); 55 MODULE_DESCRIPTION("Toshiba Laptop ACPI Extras Driver"); 56 MODULE_LICENSE("GPL"); 57 58 #define MY_LOGPREFIX "toshiba_acpi: " 59 #define MY_ERR KERN_ERR MY_LOGPREFIX 60 #define MY_NOTICE KERN_NOTICE MY_LOGPREFIX 61 #define MY_INFO KERN_INFO MY_LOGPREFIX 62 63 /* Toshiba ACPI method paths */ 64 #define METHOD_LCD_BRIGHTNESS "\\_SB_.PCI0.VGA_.LCD_._BCM" 65 #define METHOD_HCI_1 "\\_SB_.VALD.GHCI" 66 #define METHOD_HCI_2 "\\_SB_.VALZ.GHCI" 67 #define METHOD_VIDEO_OUT "\\_SB_.VALX.DSSX" 68 69 /* Toshiba HCI interface definitions 70 * 71 * HCI is Toshiba's "Hardware Control Interface" which is supposed to 72 * be uniform across all their models. Ideally we would just call 73 * dedicated ACPI methods instead of using this primitive interface. 74 * However the ACPI methods seem to be incomplete in some areas (for 75 * example they allow setting, but not reading, the LCD brightness value), 76 * so this is still useful. 77 */ 78 79 #define HCI_WORDS 6 80 81 /* operations */ 82 #define HCI_SET 0xff00 83 #define HCI_GET 0xfe00 84 85 /* return codes */ 86 #define HCI_SUCCESS 0x0000 87 #define HCI_FAILURE 0x1000 88 #define HCI_NOT_SUPPORTED 0x8000 89 #define HCI_EMPTY 0x8c00 90 91 /* registers */ 92 #define HCI_FAN 0x0004 93 #define HCI_SYSTEM_EVENT 0x0016 94 #define HCI_VIDEO_OUT 0x001c 95 #define HCI_HOTKEY_EVENT 0x001e 96 #define HCI_LCD_BRIGHTNESS 0x002a 97 #define HCI_WIRELESS 0x0056 98 99 /* field definitions */ 100 #define HCI_LCD_BRIGHTNESS_BITS 3 101 #define HCI_LCD_BRIGHTNESS_SHIFT (16-HCI_LCD_BRIGHTNESS_BITS) 102 #define HCI_LCD_BRIGHTNESS_LEVELS (1 << HCI_LCD_BRIGHTNESS_BITS) 103 #define HCI_VIDEO_OUT_LCD 0x1 104 #define HCI_VIDEO_OUT_CRT 0x2 105 #define HCI_VIDEO_OUT_TV 0x4 106 #define HCI_WIRELESS_KILL_SWITCH 0x01 107 #define HCI_WIRELESS_BT_PRESENT 0x0f 108 #define HCI_WIRELESS_BT_ATTACH 0x40 109 #define HCI_WIRELESS_BT_POWER 0x80 110 111 static const struct acpi_device_id toshiba_device_ids[] = { 112 {"TOS6200", 0}, 113 {"TOS6208", 0}, 114 {"TOS1900", 0}, 115 {"", 0}, 116 }; 117 MODULE_DEVICE_TABLE(acpi, toshiba_device_ids); 118 119 /* utility 120 */ 121 122 static __inline__ void _set_bit(u32 * word, u32 mask, int value) 123 { 124 *word = (*word & ~mask) | (mask * value); 125 } 126 127 /* acpi interface wrappers 128 */ 129 130 static int is_valid_acpi_path(const char *methodName) 131 { 132 acpi_handle handle; 133 acpi_status status; 134 135 status = acpi_get_handle(NULL, (char *)methodName, &handle); 136 return !ACPI_FAILURE(status); 137 } 138 139 static int write_acpi_int(const char *methodName, int val) 140 { 141 struct acpi_object_list params; 142 union acpi_object in_objs[1]; 143 acpi_status status; 144 145 params.count = ARRAY_SIZE(in_objs); 146 params.pointer = in_objs; 147 in_objs[0].type = ACPI_TYPE_INTEGER; 148 in_objs[0].integer.value = val; 149 150 status = acpi_evaluate_object(NULL, (char *)methodName, ¶ms, NULL); 151 return (status == AE_OK); 152 } 153 154 #if 0 155 static int read_acpi_int(const char *methodName, int *pVal) 156 { 157 struct acpi_buffer results; 158 union acpi_object out_objs[1]; 159 acpi_status status; 160 161 results.length = sizeof(out_objs); 162 results.pointer = out_objs; 163 164 status = acpi_evaluate_object(0, (char *)methodName, 0, &results); 165 *pVal = out_objs[0].integer.value; 166 167 return (status == AE_OK) && (out_objs[0].type == ACPI_TYPE_INTEGER); 168 } 169 #endif 170 171 static const char *method_hci /*= 0*/ ; 172 173 /* Perform a raw HCI call. Here we don't care about input or output buffer 174 * format. 175 */ 176 static acpi_status hci_raw(const u32 in[HCI_WORDS], u32 out[HCI_WORDS]) 177 { 178 struct acpi_object_list params; 179 union acpi_object in_objs[HCI_WORDS]; 180 struct acpi_buffer results; 181 union acpi_object out_objs[HCI_WORDS + 1]; 182 acpi_status status; 183 int i; 184 185 params.count = HCI_WORDS; 186 params.pointer = in_objs; 187 for (i = 0; i < HCI_WORDS; ++i) { 188 in_objs[i].type = ACPI_TYPE_INTEGER; 189 in_objs[i].integer.value = in[i]; 190 } 191 192 results.length = sizeof(out_objs); 193 results.pointer = out_objs; 194 195 status = acpi_evaluate_object(NULL, (char *)method_hci, ¶ms, 196 &results); 197 if ((status == AE_OK) && (out_objs->package.count <= HCI_WORDS)) { 198 for (i = 0; i < out_objs->package.count; ++i) { 199 out[i] = out_objs->package.elements[i].integer.value; 200 } 201 } 202 203 return status; 204 } 205 206 /* common hci tasks (get or set one or two value) 207 * 208 * In addition to the ACPI status, the HCI system returns a result which 209 * may be useful (such as "not supported"). 210 */ 211 212 static acpi_status hci_write1(u32 reg, u32 in1, u32 * result) 213 { 214 u32 in[HCI_WORDS] = { HCI_SET, reg, in1, 0, 0, 0 }; 215 u32 out[HCI_WORDS]; 216 acpi_status status = hci_raw(in, out); 217 *result = (status == AE_OK) ? out[0] : HCI_FAILURE; 218 return status; 219 } 220 221 static acpi_status hci_read1(u32 reg, u32 * out1, u32 * result) 222 { 223 u32 in[HCI_WORDS] = { HCI_GET, reg, 0, 0, 0, 0 }; 224 u32 out[HCI_WORDS]; 225 acpi_status status = hci_raw(in, out); 226 *out1 = out[2]; 227 *result = (status == AE_OK) ? out[0] : HCI_FAILURE; 228 return status; 229 } 230 231 static acpi_status hci_write2(u32 reg, u32 in1, u32 in2, u32 *result) 232 { 233 u32 in[HCI_WORDS] = { HCI_SET, reg, in1, in2, 0, 0 }; 234 u32 out[HCI_WORDS]; 235 acpi_status status = hci_raw(in, out); 236 *result = (status == AE_OK) ? out[0] : HCI_FAILURE; 237 return status; 238 } 239 240 static acpi_status hci_read2(u32 reg, u32 *out1, u32 *out2, u32 *result) 241 { 242 u32 in[HCI_WORDS] = { HCI_GET, reg, *out1, *out2, 0, 0 }; 243 u32 out[HCI_WORDS]; 244 acpi_status status = hci_raw(in, out); 245 *out1 = out[2]; 246 *out2 = out[3]; 247 *result = (status == AE_OK) ? out[0] : HCI_FAILURE; 248 return status; 249 } 250 251 struct toshiba_acpi_dev { 252 struct platform_device *p_dev; 253 struct rfkill *bt_rfk; 254 255 const char *bt_name; 256 257 struct mutex mutex; 258 }; 259 260 static struct toshiba_acpi_dev toshiba_acpi = { 261 .bt_name = "Toshiba Bluetooth", 262 }; 263 264 /* Bluetooth rfkill handlers */ 265 266 static u32 hci_get_bt_present(bool *present) 267 { 268 u32 hci_result; 269 u32 value, value2; 270 271 value = 0; 272 value2 = 0; 273 hci_read2(HCI_WIRELESS, &value, &value2, &hci_result); 274 if (hci_result == HCI_SUCCESS) 275 *present = (value & HCI_WIRELESS_BT_PRESENT) ? true : false; 276 277 return hci_result; 278 } 279 280 static u32 hci_get_radio_state(bool *radio_state) 281 { 282 u32 hci_result; 283 u32 value, value2; 284 285 value = 0; 286 value2 = 0x0001; 287 hci_read2(HCI_WIRELESS, &value, &value2, &hci_result); 288 289 *radio_state = value & HCI_WIRELESS_KILL_SWITCH; 290 return hci_result; 291 } 292 293 static int bt_rfkill_set_block(void *data, bool blocked) 294 { 295 struct toshiba_acpi_dev *dev = data; 296 u32 result1, result2; 297 u32 value; 298 int err; 299 bool radio_state; 300 301 value = (blocked == false); 302 303 mutex_lock(&dev->mutex); 304 if (hci_get_radio_state(&radio_state) != HCI_SUCCESS) { 305 err = -EBUSY; 306 goto out; 307 } 308 309 if (!radio_state) { 310 err = 0; 311 goto out; 312 } 313 314 hci_write2(HCI_WIRELESS, value, HCI_WIRELESS_BT_POWER, &result1); 315 hci_write2(HCI_WIRELESS, value, HCI_WIRELESS_BT_ATTACH, &result2); 316 317 if (result1 != HCI_SUCCESS || result2 != HCI_SUCCESS) 318 err = -EBUSY; 319 else 320 err = 0; 321 out: 322 mutex_unlock(&dev->mutex); 323 return err; 324 } 325 326 static void bt_rfkill_poll(struct rfkill *rfkill, void *data) 327 { 328 bool new_rfk_state; 329 bool value; 330 u32 hci_result; 331 struct toshiba_acpi_dev *dev = data; 332 333 mutex_lock(&dev->mutex); 334 335 hci_result = hci_get_radio_state(&value); 336 if (hci_result != HCI_SUCCESS) { 337 /* Can't do anything useful */ 338 mutex_unlock(&dev->mutex); 339 return; 340 } 341 342 new_rfk_state = value; 343 344 mutex_unlock(&dev->mutex); 345 346 if (rfkill_set_hw_state(rfkill, !new_rfk_state)) 347 bt_rfkill_set_block(data, true); 348 } 349 350 static const struct rfkill_ops toshiba_rfk_ops = { 351 .set_block = bt_rfkill_set_block, 352 .poll = bt_rfkill_poll, 353 }; 354 355 static struct proc_dir_entry *toshiba_proc_dir /*= 0*/ ; 356 static struct backlight_device *toshiba_backlight_device; 357 static int force_fan; 358 static int last_key_event; 359 static int key_event_valid; 360 361 static int get_lcd(struct backlight_device *bd) 362 { 363 u32 hci_result; 364 u32 value; 365 366 hci_read1(HCI_LCD_BRIGHTNESS, &value, &hci_result); 367 if (hci_result == HCI_SUCCESS) { 368 return (value >> HCI_LCD_BRIGHTNESS_SHIFT); 369 } else 370 return -EFAULT; 371 } 372 373 static int lcd_proc_show(struct seq_file *m, void *v) 374 { 375 int value = get_lcd(NULL); 376 377 if (value >= 0) { 378 seq_printf(m, "brightness: %d\n", value); 379 seq_printf(m, "brightness_levels: %d\n", 380 HCI_LCD_BRIGHTNESS_LEVELS); 381 } else { 382 printk(MY_ERR "Error reading LCD brightness\n"); 383 } 384 385 return 0; 386 } 387 388 static int lcd_proc_open(struct inode *inode, struct file *file) 389 { 390 return single_open(file, lcd_proc_show, NULL); 391 } 392 393 static int set_lcd(int value) 394 { 395 u32 hci_result; 396 397 value = value << HCI_LCD_BRIGHTNESS_SHIFT; 398 hci_write1(HCI_LCD_BRIGHTNESS, value, &hci_result); 399 if (hci_result != HCI_SUCCESS) 400 return -EFAULT; 401 402 return 0; 403 } 404 405 static int set_lcd_status(struct backlight_device *bd) 406 { 407 return set_lcd(bd->props.brightness); 408 } 409 410 static ssize_t lcd_proc_write(struct file *file, const char __user *buf, 411 size_t count, loff_t *pos) 412 { 413 char cmd[42]; 414 size_t len; 415 int value; 416 int ret; 417 418 len = min(count, sizeof(cmd) - 1); 419 if (copy_from_user(cmd, buf, len)) 420 return -EFAULT; 421 cmd[len] = '\0'; 422 423 if (sscanf(cmd, " brightness : %i", &value) == 1 && 424 value >= 0 && value < HCI_LCD_BRIGHTNESS_LEVELS) { 425 ret = set_lcd(value); 426 if (ret == 0) 427 ret = count; 428 } else { 429 ret = -EINVAL; 430 } 431 return ret; 432 } 433 434 static const struct file_operations lcd_proc_fops = { 435 .owner = THIS_MODULE, 436 .open = lcd_proc_open, 437 .read = seq_read, 438 .llseek = seq_lseek, 439 .release = single_release, 440 .write = lcd_proc_write, 441 }; 442 443 static int video_proc_show(struct seq_file *m, void *v) 444 { 445 u32 hci_result; 446 u32 value; 447 448 hci_read1(HCI_VIDEO_OUT, &value, &hci_result); 449 if (hci_result == HCI_SUCCESS) { 450 int is_lcd = (value & HCI_VIDEO_OUT_LCD) ? 1 : 0; 451 int is_crt = (value & HCI_VIDEO_OUT_CRT) ? 1 : 0; 452 int is_tv = (value & HCI_VIDEO_OUT_TV) ? 1 : 0; 453 seq_printf(m, "lcd_out: %d\n", is_lcd); 454 seq_printf(m, "crt_out: %d\n", is_crt); 455 seq_printf(m, "tv_out: %d\n", is_tv); 456 } else { 457 printk(MY_ERR "Error reading video out status\n"); 458 } 459 460 return 0; 461 } 462 463 static int video_proc_open(struct inode *inode, struct file *file) 464 { 465 return single_open(file, video_proc_show, NULL); 466 } 467 468 static ssize_t video_proc_write(struct file *file, const char __user *buf, 469 size_t count, loff_t *pos) 470 { 471 char *cmd, *buffer; 472 int value; 473 int remain = count; 474 int lcd_out = -1; 475 int crt_out = -1; 476 int tv_out = -1; 477 u32 hci_result; 478 u32 video_out; 479 480 cmd = kmalloc(count + 1, GFP_KERNEL); 481 if (!cmd) 482 return -ENOMEM; 483 if (copy_from_user(cmd, buf, count)) { 484 kfree(cmd); 485 return -EFAULT; 486 } 487 cmd[count] = '\0'; 488 489 buffer = cmd; 490 491 /* scan expression. Multiple expressions may be delimited with ; 492 * 493 * NOTE: to keep scanning simple, invalid fields are ignored 494 */ 495 while (remain) { 496 if (sscanf(buffer, " lcd_out : %i", &value) == 1) 497 lcd_out = value & 1; 498 else if (sscanf(buffer, " crt_out : %i", &value) == 1) 499 crt_out = value & 1; 500 else if (sscanf(buffer, " tv_out : %i", &value) == 1) 501 tv_out = value & 1; 502 /* advance to one character past the next ; */ 503 do { 504 ++buffer; 505 --remain; 506 } 507 while (remain && *(buffer - 1) != ';'); 508 } 509 510 kfree(cmd); 511 512 hci_read1(HCI_VIDEO_OUT, &video_out, &hci_result); 513 if (hci_result == HCI_SUCCESS) { 514 unsigned int new_video_out = video_out; 515 if (lcd_out != -1) 516 _set_bit(&new_video_out, HCI_VIDEO_OUT_LCD, lcd_out); 517 if (crt_out != -1) 518 _set_bit(&new_video_out, HCI_VIDEO_OUT_CRT, crt_out); 519 if (tv_out != -1) 520 _set_bit(&new_video_out, HCI_VIDEO_OUT_TV, tv_out); 521 /* To avoid unnecessary video disruption, only write the new 522 * video setting if something changed. */ 523 if (new_video_out != video_out) 524 write_acpi_int(METHOD_VIDEO_OUT, new_video_out); 525 } else { 526 return -EFAULT; 527 } 528 529 return count; 530 } 531 532 static const struct file_operations video_proc_fops = { 533 .owner = THIS_MODULE, 534 .open = video_proc_open, 535 .read = seq_read, 536 .llseek = seq_lseek, 537 .release = single_release, 538 .write = video_proc_write, 539 }; 540 541 static int fan_proc_show(struct seq_file *m, void *v) 542 { 543 u32 hci_result; 544 u32 value; 545 546 hci_read1(HCI_FAN, &value, &hci_result); 547 if (hci_result == HCI_SUCCESS) { 548 seq_printf(m, "running: %d\n", (value > 0)); 549 seq_printf(m, "force_on: %d\n", force_fan); 550 } else { 551 printk(MY_ERR "Error reading fan status\n"); 552 } 553 554 return 0; 555 } 556 557 static int fan_proc_open(struct inode *inode, struct file *file) 558 { 559 return single_open(file, fan_proc_show, NULL); 560 } 561 562 static ssize_t fan_proc_write(struct file *file, const char __user *buf, 563 size_t count, loff_t *pos) 564 { 565 char cmd[42]; 566 size_t len; 567 int value; 568 u32 hci_result; 569 570 len = min(count, sizeof(cmd) - 1); 571 if (copy_from_user(cmd, buf, len)) 572 return -EFAULT; 573 cmd[len] = '\0'; 574 575 if (sscanf(cmd, " force_on : %i", &value) == 1 && 576 value >= 0 && value <= 1) { 577 hci_write1(HCI_FAN, value, &hci_result); 578 if (hci_result != HCI_SUCCESS) 579 return -EFAULT; 580 else 581 force_fan = value; 582 } else { 583 return -EINVAL; 584 } 585 586 return count; 587 } 588 589 static const struct file_operations fan_proc_fops = { 590 .owner = THIS_MODULE, 591 .open = fan_proc_open, 592 .read = seq_read, 593 .llseek = seq_lseek, 594 .release = single_release, 595 .write = fan_proc_write, 596 }; 597 598 static int keys_proc_show(struct seq_file *m, void *v) 599 { 600 u32 hci_result; 601 u32 value; 602 603 if (!key_event_valid) { 604 hci_read1(HCI_SYSTEM_EVENT, &value, &hci_result); 605 if (hci_result == HCI_SUCCESS) { 606 key_event_valid = 1; 607 last_key_event = value; 608 } else if (hci_result == HCI_EMPTY) { 609 /* better luck next time */ 610 } else if (hci_result == HCI_NOT_SUPPORTED) { 611 /* This is a workaround for an unresolved issue on 612 * some machines where system events sporadically 613 * become disabled. */ 614 hci_write1(HCI_SYSTEM_EVENT, 1, &hci_result); 615 printk(MY_NOTICE "Re-enabled hotkeys\n"); 616 } else { 617 printk(MY_ERR "Error reading hotkey status\n"); 618 goto end; 619 } 620 } 621 622 seq_printf(m, "hotkey_ready: %d\n", key_event_valid); 623 seq_printf(m, "hotkey: 0x%04x\n", last_key_event); 624 end: 625 return 0; 626 } 627 628 static int keys_proc_open(struct inode *inode, struct file *file) 629 { 630 return single_open(file, keys_proc_show, NULL); 631 } 632 633 static ssize_t keys_proc_write(struct file *file, const char __user *buf, 634 size_t count, loff_t *pos) 635 { 636 char cmd[42]; 637 size_t len; 638 int value; 639 640 len = min(count, sizeof(cmd) - 1); 641 if (copy_from_user(cmd, buf, len)) 642 return -EFAULT; 643 cmd[len] = '\0'; 644 645 if (sscanf(cmd, " hotkey_ready : %i", &value) == 1 && value == 0) { 646 key_event_valid = 0; 647 } else { 648 return -EINVAL; 649 } 650 651 return count; 652 } 653 654 static const struct file_operations keys_proc_fops = { 655 .owner = THIS_MODULE, 656 .open = keys_proc_open, 657 .read = seq_read, 658 .llseek = seq_lseek, 659 .release = single_release, 660 .write = keys_proc_write, 661 }; 662 663 static int version_proc_show(struct seq_file *m, void *v) 664 { 665 seq_printf(m, "driver: %s\n", TOSHIBA_ACPI_VERSION); 666 seq_printf(m, "proc_interface: %d\n", PROC_INTERFACE_VERSION); 667 return 0; 668 } 669 670 static int version_proc_open(struct inode *inode, struct file *file) 671 { 672 return single_open(file, version_proc_show, PDE(inode)->data); 673 } 674 675 static const struct file_operations version_proc_fops = { 676 .owner = THIS_MODULE, 677 .open = version_proc_open, 678 .read = seq_read, 679 .llseek = seq_lseek, 680 .release = single_release, 681 }; 682 683 /* proc and module init 684 */ 685 686 #define PROC_TOSHIBA "toshiba" 687 688 static acpi_status __init add_device(void) 689 { 690 proc_create("lcd", S_IRUGO | S_IWUSR, toshiba_proc_dir, &lcd_proc_fops); 691 proc_create("video", S_IRUGO | S_IWUSR, toshiba_proc_dir, &video_proc_fops); 692 proc_create("fan", S_IRUGO | S_IWUSR, toshiba_proc_dir, &fan_proc_fops); 693 proc_create("keys", S_IRUGO | S_IWUSR, toshiba_proc_dir, &keys_proc_fops); 694 proc_create("version", S_IRUGO, toshiba_proc_dir, &version_proc_fops); 695 696 return AE_OK; 697 } 698 699 static acpi_status remove_device(void) 700 { 701 remove_proc_entry("lcd", toshiba_proc_dir); 702 remove_proc_entry("video", toshiba_proc_dir); 703 remove_proc_entry("fan", toshiba_proc_dir); 704 remove_proc_entry("keys", toshiba_proc_dir); 705 remove_proc_entry("version", toshiba_proc_dir); 706 return AE_OK; 707 } 708 709 static struct backlight_ops toshiba_backlight_data = { 710 .get_brightness = get_lcd, 711 .update_status = set_lcd_status, 712 }; 713 714 static void toshiba_acpi_exit(void) 715 { 716 if (toshiba_acpi.bt_rfk) { 717 rfkill_unregister(toshiba_acpi.bt_rfk); 718 rfkill_destroy(toshiba_acpi.bt_rfk); 719 } 720 721 if (toshiba_backlight_device) 722 backlight_device_unregister(toshiba_backlight_device); 723 724 remove_device(); 725 726 if (toshiba_proc_dir) 727 remove_proc_entry(PROC_TOSHIBA, acpi_root_dir); 728 729 platform_device_unregister(toshiba_acpi.p_dev); 730 731 return; 732 } 733 734 static int __init toshiba_acpi_init(void) 735 { 736 acpi_status status = AE_OK; 737 u32 hci_result; 738 bool bt_present; 739 int ret = 0; 740 741 if (acpi_disabled) 742 return -ENODEV; 743 744 /* simple device detection: look for HCI method */ 745 if (is_valid_acpi_path(METHOD_HCI_1)) 746 method_hci = METHOD_HCI_1; 747 else if (is_valid_acpi_path(METHOD_HCI_2)) 748 method_hci = METHOD_HCI_2; 749 else 750 return -ENODEV; 751 752 printk(MY_INFO "Toshiba Laptop ACPI Extras version %s\n", 753 TOSHIBA_ACPI_VERSION); 754 printk(MY_INFO " HCI method: %s\n", method_hci); 755 756 mutex_init(&toshiba_acpi.mutex); 757 758 toshiba_acpi.p_dev = platform_device_register_simple("toshiba_acpi", 759 -1, NULL, 0); 760 if (IS_ERR(toshiba_acpi.p_dev)) { 761 ret = PTR_ERR(toshiba_acpi.p_dev); 762 printk(MY_ERR "unable to register platform device\n"); 763 toshiba_acpi.p_dev = NULL; 764 toshiba_acpi_exit(); 765 return ret; 766 } 767 768 force_fan = 0; 769 key_event_valid = 0; 770 771 /* enable event fifo */ 772 hci_write1(HCI_SYSTEM_EVENT, 1, &hci_result); 773 774 toshiba_proc_dir = proc_mkdir(PROC_TOSHIBA, acpi_root_dir); 775 if (!toshiba_proc_dir) { 776 toshiba_acpi_exit(); 777 return -ENODEV; 778 } else { 779 status = add_device(); 780 if (ACPI_FAILURE(status)) { 781 toshiba_acpi_exit(); 782 return -ENODEV; 783 } 784 } 785 786 toshiba_backlight_device = backlight_device_register("toshiba", 787 &toshiba_acpi.p_dev->dev, 788 NULL, 789 &toshiba_backlight_data); 790 if (IS_ERR(toshiba_backlight_device)) { 791 ret = PTR_ERR(toshiba_backlight_device); 792 793 printk(KERN_ERR "Could not register toshiba backlight device\n"); 794 toshiba_backlight_device = NULL; 795 toshiba_acpi_exit(); 796 return ret; 797 } 798 toshiba_backlight_device->props.max_brightness = HCI_LCD_BRIGHTNESS_LEVELS - 1; 799 800 /* Register rfkill switch for Bluetooth */ 801 if (hci_get_bt_present(&bt_present) == HCI_SUCCESS && bt_present) { 802 toshiba_acpi.bt_rfk = rfkill_alloc(toshiba_acpi.bt_name, 803 &toshiba_acpi.p_dev->dev, 804 RFKILL_TYPE_BLUETOOTH, 805 &toshiba_rfk_ops, 806 &toshiba_acpi); 807 if (!toshiba_acpi.bt_rfk) { 808 printk(MY_ERR "unable to allocate rfkill device\n"); 809 toshiba_acpi_exit(); 810 return -ENOMEM; 811 } 812 813 ret = rfkill_register(toshiba_acpi.bt_rfk); 814 if (ret) { 815 printk(MY_ERR "unable to register rfkill device\n"); 816 rfkill_destroy(toshiba_acpi.bt_rfk); 817 toshiba_acpi_exit(); 818 return ret; 819 } 820 } 821 822 return 0; 823 } 824 825 module_init(toshiba_acpi_init); 826 module_exit(toshiba_acpi_exit); 827