Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame^] | 1 | /* |
| 2 | * toshiba_acpi.c - Toshiba Laptop ACPI Extras |
| 3 | * |
| 4 | * |
| 5 | * Copyright (C) 2002-2004 John Belmonte |
| 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 devolpment page for this driver is located at |
| 23 | * http://memebeam.org/toys/ToshibaAcpiDriver. |
| 24 | * |
| 25 | * Credits: |
| 26 | * Jonathan A. Buzzard - Toshiba HCI info, and critical tips on reverse |
| 27 | * engineering the Windows drivers |
| 28 | * Yasushi Nagato - changes for linux kernel 2.4 -> 2.5 |
| 29 | * Rob Miller - TV out and hotkeys help |
| 30 | * |
| 31 | * |
| 32 | * TODO |
| 33 | * |
| 34 | */ |
| 35 | |
| 36 | #define TOSHIBA_ACPI_VERSION "0.18" |
| 37 | #define PROC_INTERFACE_VERSION 1 |
| 38 | |
| 39 | #include <linux/kernel.h> |
| 40 | #include <linux/module.h> |
| 41 | #include <linux/init.h> |
| 42 | #include <linux/types.h> |
| 43 | #include <linux/proc_fs.h> |
| 44 | #include <asm/uaccess.h> |
| 45 | |
| 46 | #include <acpi/acpi_drivers.h> |
| 47 | |
| 48 | MODULE_AUTHOR("John Belmonte"); |
| 49 | MODULE_DESCRIPTION("Toshiba Laptop ACPI Extras Driver"); |
| 50 | MODULE_LICENSE("GPL"); |
| 51 | |
| 52 | #define MY_LOGPREFIX "toshiba_acpi: " |
| 53 | #define MY_ERR KERN_ERR MY_LOGPREFIX |
| 54 | #define MY_NOTICE KERN_NOTICE MY_LOGPREFIX |
| 55 | #define MY_INFO KERN_INFO MY_LOGPREFIX |
| 56 | |
| 57 | /* Toshiba ACPI method paths */ |
| 58 | #define METHOD_LCD_BRIGHTNESS "\\_SB_.PCI0.VGA_.LCD_._BCM" |
| 59 | #define METHOD_HCI_1 "\\_SB_.VALD.GHCI" |
| 60 | #define METHOD_HCI_2 "\\_SB_.VALZ.GHCI" |
| 61 | #define METHOD_VIDEO_OUT "\\_SB_.VALX.DSSX" |
| 62 | |
| 63 | /* Toshiba HCI interface definitions |
| 64 | * |
| 65 | * HCI is Toshiba's "Hardware Control Interface" which is supposed to |
| 66 | * be uniform across all their models. Ideally we would just call |
| 67 | * dedicated ACPI methods instead of using this primitive interface. |
| 68 | * However the ACPI methods seem to be incomplete in some areas (for |
| 69 | * example they allow setting, but not reading, the LCD brightness value), |
| 70 | * so this is still useful. |
| 71 | */ |
| 72 | |
| 73 | #define HCI_WORDS 6 |
| 74 | |
| 75 | /* operations */ |
| 76 | #define HCI_SET 0xff00 |
| 77 | #define HCI_GET 0xfe00 |
| 78 | |
| 79 | /* return codes */ |
| 80 | #define HCI_SUCCESS 0x0000 |
| 81 | #define HCI_FAILURE 0x1000 |
| 82 | #define HCI_NOT_SUPPORTED 0x8000 |
| 83 | #define HCI_EMPTY 0x8c00 |
| 84 | |
| 85 | /* registers */ |
| 86 | #define HCI_FAN 0x0004 |
| 87 | #define HCI_SYSTEM_EVENT 0x0016 |
| 88 | #define HCI_VIDEO_OUT 0x001c |
| 89 | #define HCI_HOTKEY_EVENT 0x001e |
| 90 | #define HCI_LCD_BRIGHTNESS 0x002a |
| 91 | |
| 92 | /* field definitions */ |
| 93 | #define HCI_LCD_BRIGHTNESS_BITS 3 |
| 94 | #define HCI_LCD_BRIGHTNESS_SHIFT (16-HCI_LCD_BRIGHTNESS_BITS) |
| 95 | #define HCI_LCD_BRIGHTNESS_LEVELS (1 << HCI_LCD_BRIGHTNESS_BITS) |
| 96 | #define HCI_VIDEO_OUT_LCD 0x1 |
| 97 | #define HCI_VIDEO_OUT_CRT 0x2 |
| 98 | #define HCI_VIDEO_OUT_TV 0x4 |
| 99 | |
| 100 | /* utility |
| 101 | */ |
| 102 | |
| 103 | static __inline__ void |
| 104 | _set_bit(u32* word, u32 mask, int value) |
| 105 | { |
| 106 | *word = (*word & ~mask) | (mask * value); |
| 107 | } |
| 108 | |
| 109 | /* acpi interface wrappers |
| 110 | */ |
| 111 | |
| 112 | static int |
| 113 | is_valid_acpi_path(const char* methodName) |
| 114 | { |
| 115 | acpi_handle handle; |
| 116 | acpi_status status; |
| 117 | |
| 118 | status = acpi_get_handle(NULL, (char*)methodName, &handle); |
| 119 | return !ACPI_FAILURE(status); |
| 120 | } |
| 121 | |
| 122 | static int |
| 123 | write_acpi_int(const char* methodName, int val) |
| 124 | { |
| 125 | struct acpi_object_list params; |
| 126 | union acpi_object in_objs[1]; |
| 127 | acpi_status status; |
| 128 | |
| 129 | params.count = sizeof(in_objs)/sizeof(in_objs[0]); |
| 130 | params.pointer = in_objs; |
| 131 | in_objs[0].type = ACPI_TYPE_INTEGER; |
| 132 | in_objs[0].integer.value = val; |
| 133 | |
| 134 | status = acpi_evaluate_object(NULL, (char*)methodName, ¶ms, NULL); |
| 135 | return (status == AE_OK); |
| 136 | } |
| 137 | |
| 138 | #if 0 |
| 139 | static int |
| 140 | read_acpi_int(const char* methodName, int* pVal) |
| 141 | { |
| 142 | struct acpi_buffer results; |
| 143 | union acpi_object out_objs[1]; |
| 144 | acpi_status status; |
| 145 | |
| 146 | results.length = sizeof(out_objs); |
| 147 | results.pointer = out_objs; |
| 148 | |
| 149 | status = acpi_evaluate_object(0, (char*)methodName, 0, &results); |
| 150 | *pVal = out_objs[0].integer.value; |
| 151 | |
| 152 | return (status == AE_OK) && (out_objs[0].type == ACPI_TYPE_INTEGER); |
| 153 | } |
| 154 | #endif |
| 155 | |
| 156 | static const char* method_hci /*= 0*/; |
| 157 | |
| 158 | /* Perform a raw HCI call. Here we don't care about input or output buffer |
| 159 | * format. |
| 160 | */ |
| 161 | static acpi_status |
| 162 | hci_raw(const u32 in[HCI_WORDS], u32 out[HCI_WORDS]) |
| 163 | { |
| 164 | struct acpi_object_list params; |
| 165 | union acpi_object in_objs[HCI_WORDS]; |
| 166 | struct acpi_buffer results; |
| 167 | union acpi_object out_objs[HCI_WORDS+1]; |
| 168 | acpi_status status; |
| 169 | int i; |
| 170 | |
| 171 | params.count = HCI_WORDS; |
| 172 | params.pointer = in_objs; |
| 173 | for (i = 0; i < HCI_WORDS; ++i) { |
| 174 | in_objs[i].type = ACPI_TYPE_INTEGER; |
| 175 | in_objs[i].integer.value = in[i]; |
| 176 | } |
| 177 | |
| 178 | results.length = sizeof(out_objs); |
| 179 | results.pointer = out_objs; |
| 180 | |
| 181 | status = acpi_evaluate_object(NULL, (char*)method_hci, ¶ms, |
| 182 | &results); |
| 183 | if ((status == AE_OK) && (out_objs->package.count <= HCI_WORDS)) { |
| 184 | for (i = 0; i < out_objs->package.count; ++i) { |
| 185 | out[i] = out_objs->package.elements[i].integer.value; |
| 186 | } |
| 187 | } |
| 188 | |
| 189 | return status; |
| 190 | } |
| 191 | |
| 192 | /* common hci tasks (get or set one value) |
| 193 | * |
| 194 | * In addition to the ACPI status, the HCI system returns a result which |
| 195 | * may be useful (such as "not supported"). |
| 196 | */ |
| 197 | |
| 198 | static acpi_status |
| 199 | hci_write1(u32 reg, u32 in1, u32* result) |
| 200 | { |
| 201 | u32 in[HCI_WORDS] = { HCI_SET, reg, in1, 0, 0, 0 }; |
| 202 | u32 out[HCI_WORDS]; |
| 203 | acpi_status status = hci_raw(in, out); |
| 204 | *result = (status == AE_OK) ? out[0] : HCI_FAILURE; |
| 205 | return status; |
| 206 | } |
| 207 | |
| 208 | static acpi_status |
| 209 | hci_read1(u32 reg, u32* out1, u32* result) |
| 210 | { |
| 211 | u32 in[HCI_WORDS] = { HCI_GET, reg, 0, 0, 0, 0 }; |
| 212 | u32 out[HCI_WORDS]; |
| 213 | acpi_status status = hci_raw(in, out); |
| 214 | *out1 = out[2]; |
| 215 | *result = (status == AE_OK) ? out[0] : HCI_FAILURE; |
| 216 | return status; |
| 217 | } |
| 218 | |
| 219 | static struct proc_dir_entry* toshiba_proc_dir /*= 0*/; |
| 220 | static int force_fan; |
| 221 | static int last_key_event; |
| 222 | static int key_event_valid; |
| 223 | |
| 224 | typedef struct _ProcItem |
| 225 | { |
| 226 | const char* name; |
| 227 | char* (*read_func)(char*); |
| 228 | unsigned long (*write_func)(const char*, unsigned long); |
| 229 | } ProcItem; |
| 230 | |
| 231 | /* proc file handlers |
| 232 | */ |
| 233 | |
| 234 | static int |
| 235 | dispatch_read(char* page, char** start, off_t off, int count, int* eof, |
| 236 | ProcItem* item) |
| 237 | { |
| 238 | char* p = page; |
| 239 | int len; |
| 240 | |
| 241 | if (off == 0) |
| 242 | p = item->read_func(p); |
| 243 | |
| 244 | /* ISSUE: I don't understand this code */ |
| 245 | len = (p - page); |
| 246 | if (len <= off+count) *eof = 1; |
| 247 | *start = page + off; |
| 248 | len -= off; |
| 249 | if (len>count) len = count; |
| 250 | if (len<0) len = 0; |
| 251 | return len; |
| 252 | } |
| 253 | |
| 254 | static int |
| 255 | dispatch_write(struct file* file, const char __user * buffer, |
| 256 | unsigned long count, ProcItem* item) |
| 257 | { |
| 258 | int result; |
| 259 | char* tmp_buffer; |
| 260 | |
| 261 | /* Arg buffer points to userspace memory, which can't be accessed |
| 262 | * directly. Since we're making a copy, zero-terminate the |
| 263 | * destination so that sscanf can be used on it safely. |
| 264 | */ |
| 265 | tmp_buffer = kmalloc(count + 1, GFP_KERNEL); |
| 266 | if (copy_from_user(tmp_buffer, buffer, count)) { |
| 267 | result = -EFAULT; |
| 268 | } |
| 269 | else { |
| 270 | tmp_buffer[count] = 0; |
| 271 | result = item->write_func(tmp_buffer, count); |
| 272 | } |
| 273 | kfree(tmp_buffer); |
| 274 | return result; |
| 275 | } |
| 276 | |
| 277 | static char* |
| 278 | read_lcd(char* p) |
| 279 | { |
| 280 | u32 hci_result; |
| 281 | u32 value; |
| 282 | |
| 283 | hci_read1(HCI_LCD_BRIGHTNESS, &value, &hci_result); |
| 284 | if (hci_result == HCI_SUCCESS) { |
| 285 | value = value >> HCI_LCD_BRIGHTNESS_SHIFT; |
| 286 | p += sprintf(p, "brightness: %d\n", value); |
| 287 | p += sprintf(p, "brightness_levels: %d\n", |
| 288 | HCI_LCD_BRIGHTNESS_LEVELS); |
| 289 | } else { |
| 290 | printk(MY_ERR "Error reading LCD brightness\n"); |
| 291 | } |
| 292 | |
| 293 | return p; |
| 294 | } |
| 295 | |
| 296 | static unsigned long |
| 297 | write_lcd(const char* buffer, unsigned long count) |
| 298 | { |
| 299 | int value; |
| 300 | u32 hci_result; |
| 301 | |
| 302 | if (sscanf(buffer, " brightness : %i", &value) == 1 && |
| 303 | value >= 0 && value < HCI_LCD_BRIGHTNESS_LEVELS) { |
| 304 | value = value << HCI_LCD_BRIGHTNESS_SHIFT; |
| 305 | hci_write1(HCI_LCD_BRIGHTNESS, value, &hci_result); |
| 306 | if (hci_result != HCI_SUCCESS) |
| 307 | return -EFAULT; |
| 308 | } else { |
| 309 | return -EINVAL; |
| 310 | } |
| 311 | |
| 312 | return count; |
| 313 | } |
| 314 | |
| 315 | static char* |
| 316 | read_video(char* p) |
| 317 | { |
| 318 | u32 hci_result; |
| 319 | u32 value; |
| 320 | |
| 321 | hci_read1(HCI_VIDEO_OUT, &value, &hci_result); |
| 322 | if (hci_result == HCI_SUCCESS) { |
| 323 | int is_lcd = (value & HCI_VIDEO_OUT_LCD) ? 1 : 0; |
| 324 | int is_crt = (value & HCI_VIDEO_OUT_CRT) ? 1 : 0; |
| 325 | int is_tv = (value & HCI_VIDEO_OUT_TV ) ? 1 : 0; |
| 326 | p += sprintf(p, "lcd_out: %d\n", is_lcd); |
| 327 | p += sprintf(p, "crt_out: %d\n", is_crt); |
| 328 | p += sprintf(p, "tv_out: %d\n", is_tv); |
| 329 | } else { |
| 330 | printk(MY_ERR "Error reading video out status\n"); |
| 331 | } |
| 332 | |
| 333 | return p; |
| 334 | } |
| 335 | |
| 336 | static unsigned long |
| 337 | write_video(const char* buffer, unsigned long count) |
| 338 | { |
| 339 | int value; |
| 340 | int remain = count; |
| 341 | int lcd_out = -1; |
| 342 | int crt_out = -1; |
| 343 | int tv_out = -1; |
| 344 | u32 hci_result; |
| 345 | int video_out; |
| 346 | |
| 347 | /* scan expression. Multiple expressions may be delimited with ; |
| 348 | * |
| 349 | * NOTE: to keep scanning simple, invalid fields are ignored |
| 350 | */ |
| 351 | while (remain) { |
| 352 | if (sscanf(buffer, " lcd_out : %i", &value) == 1) |
| 353 | lcd_out = value & 1; |
| 354 | else if (sscanf(buffer, " crt_out : %i", &value) == 1) |
| 355 | crt_out = value & 1; |
| 356 | else if (sscanf(buffer, " tv_out : %i", &value) == 1) |
| 357 | tv_out = value & 1; |
| 358 | /* advance to one character past the next ; */ |
| 359 | do { |
| 360 | ++buffer; |
| 361 | --remain; |
| 362 | } |
| 363 | while (remain && *(buffer-1) != ';'); |
| 364 | } |
| 365 | |
| 366 | hci_read1(HCI_VIDEO_OUT, &video_out, &hci_result); |
| 367 | if (hci_result == HCI_SUCCESS) { |
| 368 | int new_video_out = video_out; |
| 369 | if (lcd_out != -1) |
| 370 | _set_bit(&new_video_out, HCI_VIDEO_OUT_LCD, lcd_out); |
| 371 | if (crt_out != -1) |
| 372 | _set_bit(&new_video_out, HCI_VIDEO_OUT_CRT, crt_out); |
| 373 | if (tv_out != -1) |
| 374 | _set_bit(&new_video_out, HCI_VIDEO_OUT_TV, tv_out); |
| 375 | /* To avoid unnecessary video disruption, only write the new |
| 376 | * video setting if something changed. */ |
| 377 | if (new_video_out != video_out) |
| 378 | write_acpi_int(METHOD_VIDEO_OUT, new_video_out); |
| 379 | } else { |
| 380 | return -EFAULT; |
| 381 | } |
| 382 | |
| 383 | return count; |
| 384 | } |
| 385 | |
| 386 | static char* |
| 387 | read_fan(char* p) |
| 388 | { |
| 389 | u32 hci_result; |
| 390 | u32 value; |
| 391 | |
| 392 | hci_read1(HCI_FAN, &value, &hci_result); |
| 393 | if (hci_result == HCI_SUCCESS) { |
| 394 | p += sprintf(p, "running: %d\n", (value > 0)); |
| 395 | p += sprintf(p, "force_on: %d\n", force_fan); |
| 396 | } else { |
| 397 | printk(MY_ERR "Error reading fan status\n"); |
| 398 | } |
| 399 | |
| 400 | return p; |
| 401 | } |
| 402 | |
| 403 | static unsigned long |
| 404 | write_fan(const char* buffer, unsigned long count) |
| 405 | { |
| 406 | int value; |
| 407 | u32 hci_result; |
| 408 | |
| 409 | if (sscanf(buffer, " force_on : %i", &value) == 1 && |
| 410 | value >= 0 && value <= 1) { |
| 411 | hci_write1(HCI_FAN, value, &hci_result); |
| 412 | if (hci_result != HCI_SUCCESS) |
| 413 | return -EFAULT; |
| 414 | else |
| 415 | force_fan = value; |
| 416 | } else { |
| 417 | return -EINVAL; |
| 418 | } |
| 419 | |
| 420 | return count; |
| 421 | } |
| 422 | |
| 423 | static char* |
| 424 | read_keys(char* p) |
| 425 | { |
| 426 | u32 hci_result; |
| 427 | u32 value; |
| 428 | |
| 429 | if (!key_event_valid) { |
| 430 | hci_read1(HCI_SYSTEM_EVENT, &value, &hci_result); |
| 431 | if (hci_result == HCI_SUCCESS) { |
| 432 | key_event_valid = 1; |
| 433 | last_key_event = value; |
| 434 | } else if (hci_result == HCI_EMPTY) { |
| 435 | /* better luck next time */ |
| 436 | } else if (hci_result == HCI_NOT_SUPPORTED) { |
| 437 | /* This is a workaround for an unresolved issue on |
| 438 | * some machines where system events sporadically |
| 439 | * become disabled. */ |
| 440 | hci_write1(HCI_SYSTEM_EVENT, 1, &hci_result); |
| 441 | printk(MY_NOTICE "Re-enabled hotkeys\n"); |
| 442 | } else { |
| 443 | printk(MY_ERR "Error reading hotkey status\n"); |
| 444 | goto end; |
| 445 | } |
| 446 | } |
| 447 | |
| 448 | p += sprintf(p, "hotkey_ready: %d\n", key_event_valid); |
| 449 | p += sprintf(p, "hotkey: 0x%04x\n", last_key_event); |
| 450 | |
| 451 | end: |
| 452 | return p; |
| 453 | } |
| 454 | |
| 455 | static unsigned long |
| 456 | write_keys(const char* buffer, unsigned long count) |
| 457 | { |
| 458 | int value; |
| 459 | |
| 460 | if (sscanf(buffer, " hotkey_ready : %i", &value) == 1 && |
| 461 | value == 0) { |
| 462 | key_event_valid = 0; |
| 463 | } else { |
| 464 | return -EINVAL; |
| 465 | } |
| 466 | |
| 467 | return count; |
| 468 | } |
| 469 | |
| 470 | static char* |
| 471 | read_version(char* p) |
| 472 | { |
| 473 | p += sprintf(p, "driver: %s\n", TOSHIBA_ACPI_VERSION); |
| 474 | p += sprintf(p, "proc_interface: %d\n", |
| 475 | PROC_INTERFACE_VERSION); |
| 476 | return p; |
| 477 | } |
| 478 | |
| 479 | /* proc and module init |
| 480 | */ |
| 481 | |
| 482 | #define PROC_TOSHIBA "toshiba" |
| 483 | |
| 484 | static ProcItem proc_items[] = |
| 485 | { |
| 486 | { "lcd" , read_lcd , write_lcd }, |
| 487 | { "video" , read_video , write_video }, |
| 488 | { "fan" , read_fan , write_fan }, |
| 489 | { "keys" , read_keys , write_keys }, |
| 490 | { "version" , read_version , NULL }, |
| 491 | { NULL } |
| 492 | }; |
| 493 | |
| 494 | static acpi_status __init |
| 495 | add_device(void) |
| 496 | { |
| 497 | struct proc_dir_entry* proc; |
| 498 | ProcItem* item; |
| 499 | |
| 500 | for (item = proc_items; item->name; ++item) |
| 501 | { |
| 502 | proc = create_proc_read_entry(item->name, |
| 503 | S_IFREG | S_IRUGO | S_IWUSR, |
| 504 | toshiba_proc_dir, (read_proc_t*)dispatch_read, item); |
| 505 | if (proc) |
| 506 | proc->owner = THIS_MODULE; |
| 507 | if (proc && item->write_func) |
| 508 | proc->write_proc = (write_proc_t*)dispatch_write; |
| 509 | } |
| 510 | |
| 511 | return AE_OK; |
| 512 | } |
| 513 | |
| 514 | static acpi_status __exit |
| 515 | remove_device(void) |
| 516 | { |
| 517 | ProcItem* item; |
| 518 | |
| 519 | for (item = proc_items; item->name; ++item) |
| 520 | remove_proc_entry(item->name, toshiba_proc_dir); |
| 521 | return AE_OK; |
| 522 | } |
| 523 | |
| 524 | static int __init |
| 525 | toshiba_acpi_init(void) |
| 526 | { |
| 527 | acpi_status status = AE_OK; |
| 528 | u32 hci_result; |
| 529 | |
| 530 | if (acpi_disabled) |
| 531 | return -ENODEV; |
| 532 | /* simple device detection: look for HCI method */ |
| 533 | if (is_valid_acpi_path(METHOD_HCI_1)) |
| 534 | method_hci = METHOD_HCI_1; |
| 535 | else if (is_valid_acpi_path(METHOD_HCI_2)) |
| 536 | method_hci = METHOD_HCI_2; |
| 537 | else |
| 538 | return -ENODEV; |
| 539 | |
| 540 | printk(MY_INFO "Toshiba Laptop ACPI Extras version %s\n", |
| 541 | TOSHIBA_ACPI_VERSION); |
| 542 | printk(MY_INFO " HCI method: %s\n", method_hci); |
| 543 | |
| 544 | force_fan = 0; |
| 545 | key_event_valid = 0; |
| 546 | |
| 547 | /* enable event fifo */ |
| 548 | hci_write1(HCI_SYSTEM_EVENT, 1, &hci_result); |
| 549 | |
| 550 | toshiba_proc_dir = proc_mkdir(PROC_TOSHIBA, acpi_root_dir); |
| 551 | if (!toshiba_proc_dir) { |
| 552 | status = AE_ERROR; |
| 553 | } else { |
| 554 | toshiba_proc_dir->owner = THIS_MODULE; |
| 555 | status = add_device(); |
| 556 | if (ACPI_FAILURE(status)) |
| 557 | remove_proc_entry(PROC_TOSHIBA, acpi_root_dir); |
| 558 | } |
| 559 | |
| 560 | return (ACPI_SUCCESS(status)) ? 0 : -ENODEV; |
| 561 | } |
| 562 | |
| 563 | static void __exit |
| 564 | toshiba_acpi_exit(void) |
| 565 | { |
| 566 | remove_device(); |
| 567 | |
| 568 | if (toshiba_proc_dir) |
| 569 | remove_proc_entry(PROC_TOSHIBA, acpi_root_dir); |
| 570 | |
| 571 | return; |
| 572 | } |
| 573 | |
| 574 | module_init(toshiba_acpi_init); |
| 575 | module_exit(toshiba_acpi_exit); |