Kristen Carlson Accardi | 01b57e7 | 2006-10-20 14:30:25 -0700 | [diff] [blame^] | 1 | /* |
| 2 | * bay.c - ACPI removable drive bay driver |
| 3 | * |
| 4 | * Copyright (C) 2006 Kristen Carlson Accardi <kristen.c.accardi@intel.com> |
| 5 | * |
| 6 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
| 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 (at |
| 11 | * your option) any later version. |
| 12 | * |
| 13 | * This program is distributed in the hope that it will be useful, but |
| 14 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 16 | * General Public License for more details. |
| 17 | * |
| 18 | * You should have received a copy of the GNU General Public License along |
| 19 | * with this program; if not, write to the Free Software Foundation, Inc., |
| 20 | * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. |
| 21 | * |
| 22 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
| 23 | */ |
| 24 | #include <linux/kernel.h> |
| 25 | #include <linux/module.h> |
| 26 | #include <linux/init.h> |
| 27 | #include <linux/types.h> |
| 28 | #include <linux/notifier.h> |
| 29 | #include <acpi/acpi_bus.h> |
| 30 | #include <acpi/acpi_drivers.h> |
| 31 | #include <linux/proc_fs.h> |
| 32 | #include <linux/seq_file.h> |
| 33 | #include <asm/uaccess.h> |
| 34 | |
| 35 | #define ACPI_BAY_DRIVER_NAME "ACPI Removable Drive Bay Driver" |
| 36 | |
| 37 | ACPI_MODULE_NAME("bay") |
| 38 | MODULE_AUTHOR("Kristen Carlson Accardi"); |
| 39 | MODULE_DESCRIPTION(ACPI_BAY_DRIVER_NAME); |
| 40 | MODULE_LICENSE("GPL"); |
| 41 | #define ACPI_BAY_CLASS "bay" |
| 42 | #define ACPI_BAY_COMPONENT 0x10000000 |
| 43 | #define _COMPONENT ACPI_BAY_COMPONENT |
| 44 | #define bay_dprintk(h,s) {\ |
| 45 | char prefix[80] = {'\0'};\ |
| 46 | struct acpi_buffer buffer = {sizeof(prefix), prefix};\ |
| 47 | acpi_get_name(h, ACPI_FULL_PATHNAME, &buffer);\ |
| 48 | printk(KERN_DEBUG PREFIX "%s: %s\n", prefix, s); } |
| 49 | |
| 50 | static void bay_notify(acpi_handle handle, u32 event, void *data); |
| 51 | static int acpi_bay_add(struct acpi_device *device); |
| 52 | static int acpi_bay_remove(struct acpi_device *device, int type); |
| 53 | static int acpi_bay_match(struct acpi_device *device, |
| 54 | struct acpi_driver *driver); |
| 55 | |
| 56 | static struct acpi_driver acpi_bay_driver = { |
| 57 | .name = ACPI_BAY_DRIVER_NAME, |
| 58 | .class = ACPI_BAY_CLASS, |
| 59 | .ops = { |
| 60 | .add = acpi_bay_add, |
| 61 | .remove = acpi_bay_remove, |
| 62 | .match = acpi_bay_match, |
| 63 | }, |
| 64 | }; |
| 65 | |
| 66 | struct bay { |
| 67 | acpi_handle handle; |
| 68 | char *name; |
| 69 | struct list_head list; |
| 70 | struct proc_dir_entry *proc; |
| 71 | }; |
| 72 | |
| 73 | LIST_HEAD(drive_bays); |
| 74 | |
| 75 | static struct proc_dir_entry *acpi_bay_dir; |
| 76 | |
| 77 | /***************************************************************************** |
| 78 | * Drive Bay functions * |
| 79 | *****************************************************************************/ |
| 80 | /** |
| 81 | * is_ejectable - see if a device is ejectable |
| 82 | * @handle: acpi handle of the device |
| 83 | * |
| 84 | * If an acpi object has a _EJ0 method, then it is ejectable |
| 85 | */ |
| 86 | static int is_ejectable(acpi_handle handle) |
| 87 | { |
| 88 | acpi_status status; |
| 89 | acpi_handle tmp; |
| 90 | |
| 91 | status = acpi_get_handle(handle, "_EJ0", &tmp); |
| 92 | if (ACPI_FAILURE(status)) |
| 93 | return 0; |
| 94 | return 1; |
| 95 | } |
| 96 | |
| 97 | /** |
| 98 | * bay_present - see if the bay device is present |
| 99 | * @bay: the drive bay |
| 100 | * |
| 101 | * execute the _STA method. |
| 102 | */ |
| 103 | static int bay_present(struct bay *bay) |
| 104 | { |
| 105 | unsigned long sta; |
| 106 | acpi_status status; |
| 107 | |
| 108 | if (bay) { |
| 109 | status = acpi_evaluate_integer(bay->handle, "_STA", NULL, &sta); |
| 110 | if (ACPI_SUCCESS(status) && sta) |
| 111 | return 1; |
| 112 | } |
| 113 | return 0; |
| 114 | } |
| 115 | |
| 116 | /** |
| 117 | * eject_device - respond to an eject request |
| 118 | * @handle - the device to eject |
| 119 | * |
| 120 | * Call this devices _EJ0 method. |
| 121 | */ |
| 122 | static void eject_device(acpi_handle handle) |
| 123 | { |
| 124 | struct acpi_object_list arg_list; |
| 125 | union acpi_object arg; |
| 126 | |
| 127 | bay_dprintk(handle, "Ejecting device"); |
| 128 | |
| 129 | arg_list.count = 1; |
| 130 | arg_list.pointer = &arg; |
| 131 | arg.type = ACPI_TYPE_INTEGER; |
| 132 | arg.integer.value = 1; |
| 133 | |
| 134 | if (ACPI_FAILURE(acpi_evaluate_object(handle, "_EJ0", |
| 135 | &arg_list, NULL))) |
| 136 | pr_debug("Failed to evaluate _EJ0!\n"); |
| 137 | } |
| 138 | |
| 139 | |
| 140 | /** |
| 141 | * is_ata - see if a device is an ata device |
| 142 | * @handle: acpi handle of the device |
| 143 | * |
| 144 | * If an acpi object has one of 4 ATA ACPI methods defined, |
| 145 | * then it is an ATA device |
| 146 | */ |
| 147 | static int is_ata(acpi_handle handle) |
| 148 | { |
| 149 | acpi_handle tmp; |
| 150 | |
| 151 | if ((ACPI_SUCCESS(acpi_get_handle(handle, "_GTF", &tmp))) || |
| 152 | (ACPI_SUCCESS(acpi_get_handle(handle, "_GTM", &tmp))) || |
| 153 | (ACPI_SUCCESS(acpi_get_handle(handle, "_STM", &tmp))) || |
| 154 | (ACPI_SUCCESS(acpi_get_handle(handle, "_SDD", &tmp)))) |
| 155 | return 1; |
| 156 | |
| 157 | return 0; |
| 158 | } |
| 159 | |
| 160 | /** |
| 161 | * parent_is_ata(acpi_handle handle) |
| 162 | * |
| 163 | */ |
| 164 | static int parent_is_ata(acpi_handle handle) |
| 165 | { |
| 166 | acpi_handle phandle; |
| 167 | |
| 168 | if (acpi_get_parent(handle, &phandle)) |
| 169 | return 0; |
| 170 | |
| 171 | return is_ata(phandle); |
| 172 | } |
| 173 | |
| 174 | /** |
| 175 | * is_ejectable_bay - see if a device is an ejectable drive bay |
| 176 | * @handle: acpi handle of the device |
| 177 | * |
| 178 | * If an acpi object is ejectable and has one of the ACPI ATA |
| 179 | * methods defined, then we can safely call it an ejectable |
| 180 | * drive bay |
| 181 | */ |
| 182 | static int is_ejectable_bay(acpi_handle handle) |
| 183 | { |
| 184 | if ((is_ata(handle) || parent_is_ata(handle)) && is_ejectable(handle)) |
| 185 | return 1; |
| 186 | return 0; |
| 187 | } |
| 188 | |
| 189 | /** |
| 190 | * eject_removable_drive - try to eject this drive |
| 191 | * @dev : the device structure of the drive |
| 192 | * |
| 193 | * If a device is a removable drive that requires an _EJ0 method |
| 194 | * to be executed in order to safely remove from the system, do |
| 195 | * it. ATM - always returns success |
| 196 | */ |
| 197 | int eject_removable_drive(struct device *dev) |
| 198 | { |
| 199 | acpi_handle handle = DEVICE_ACPI_HANDLE(dev); |
| 200 | |
| 201 | if (handle) { |
| 202 | bay_dprintk(handle, "Got device handle"); |
| 203 | if (is_ejectable_bay(handle)) |
| 204 | eject_device(handle); |
| 205 | } else { |
| 206 | printk("No acpi handle for device\n"); |
| 207 | } |
| 208 | |
| 209 | /* should I return an error code? */ |
| 210 | return 0; |
| 211 | } |
| 212 | EXPORT_SYMBOL_GPL(eject_removable_drive); |
| 213 | |
| 214 | static int acpi_bay_add(struct acpi_device *device) |
| 215 | { |
| 216 | bay_dprintk(device->handle, "adding bay device"); |
| 217 | strcpy(acpi_device_name(device), "Dockable Bay"); |
| 218 | strcpy(acpi_device_class(device), "bay"); |
| 219 | return 0; |
| 220 | } |
| 221 | |
| 222 | static int acpi_bay_status_seq_show(struct seq_file *seq, void *offset) |
| 223 | { |
| 224 | struct bay *bay = (struct bay *)seq->private; |
| 225 | |
| 226 | if (!bay) |
| 227 | return 0; |
| 228 | |
| 229 | if (bay_present(bay)) |
| 230 | seq_printf(seq, "present\n"); |
| 231 | else |
| 232 | seq_printf(seq, "removed\n"); |
| 233 | |
| 234 | return 0; |
| 235 | } |
| 236 | |
| 237 | static ssize_t |
| 238 | acpi_bay_write_eject(struct file *file, |
| 239 | const char __user * buffer, |
| 240 | size_t count, loff_t * data) |
| 241 | { |
| 242 | struct seq_file *m = (struct seq_file *)file->private_data; |
| 243 | struct bay *bay = (struct bay *)m->private; |
| 244 | char str[12] = { 0 }; |
| 245 | u32 state = 0; |
| 246 | |
| 247 | /* FIXME - our only valid value here is 1 */ |
| 248 | if (!bay || count + 1 > sizeof str) |
| 249 | return -EINVAL; |
| 250 | |
| 251 | if (copy_from_user(str, buffer, count)) |
| 252 | return -EFAULT; |
| 253 | |
| 254 | str[count] = 0; |
| 255 | state = simple_strtoul(str, NULL, 0); |
| 256 | if (state) |
| 257 | eject_device(bay->handle); |
| 258 | |
| 259 | return count; |
| 260 | } |
| 261 | |
| 262 | static int |
| 263 | acpi_bay_status_open_fs(struct inode *inode, struct file *file) |
| 264 | { |
| 265 | return single_open(file, acpi_bay_status_seq_show, |
| 266 | PDE(inode)->data); |
| 267 | } |
| 268 | |
| 269 | static int |
| 270 | acpi_bay_eject_open_fs(struct inode *inode, struct file *file) |
| 271 | { |
| 272 | return single_open(file, acpi_bay_status_seq_show, |
| 273 | PDE(inode)->data); |
| 274 | } |
| 275 | |
| 276 | static struct file_operations acpi_bay_status_fops = { |
| 277 | .open = acpi_bay_status_open_fs, |
| 278 | .read = seq_read, |
| 279 | .llseek = seq_lseek, |
| 280 | .release = single_release, |
| 281 | }; |
| 282 | |
| 283 | static struct file_operations acpi_bay_eject_fops = { |
| 284 | .open = acpi_bay_eject_open_fs, |
| 285 | .read = seq_read, |
| 286 | .write = acpi_bay_write_eject, |
| 287 | .llseek = seq_lseek, |
| 288 | .release = single_release, |
| 289 | }; |
| 290 | #if 0 |
| 291 | static struct file_operations acpi_bay_insert_fops = { |
| 292 | .open = acpi_bay_insert_open_fs, |
| 293 | .read = seq_read, |
| 294 | .llseek = seq_lseek, |
| 295 | .release = single_release, |
| 296 | }; |
| 297 | #endif |
| 298 | static int acpi_bay_add_fs(struct bay *bay) |
| 299 | { |
| 300 | struct proc_dir_entry *entry = NULL; |
| 301 | |
| 302 | if (!bay) |
| 303 | return -EINVAL; |
| 304 | |
| 305 | /* |
| 306 | * create a proc entry for this device |
| 307 | * we need to do this a little bit differently than normal |
| 308 | * acpi device drivers because our device may not be present |
| 309 | * at the moment, and therefore we have no acpi_device struct |
| 310 | */ |
| 311 | |
| 312 | bay->proc = proc_mkdir(bay->name, acpi_bay_dir); |
| 313 | |
| 314 | /* 'status' [R] */ |
| 315 | entry = create_proc_entry("status", |
| 316 | S_IRUGO, bay->proc); |
| 317 | if (!entry) |
| 318 | return -EIO; |
| 319 | else { |
| 320 | entry->proc_fops = &acpi_bay_status_fops; |
| 321 | entry->data = bay; |
| 322 | entry->owner = THIS_MODULE; |
| 323 | } |
| 324 | /* 'eject' [W] */ |
| 325 | entry = create_proc_entry("eject", |
| 326 | S_IWUGO, bay->proc); |
| 327 | if (!entry) |
| 328 | return -EIO; |
| 329 | else { |
| 330 | entry->proc_fops = &acpi_bay_eject_fops; |
| 331 | entry->data = bay; |
| 332 | entry->owner = THIS_MODULE; |
| 333 | } |
| 334 | #if 0 |
| 335 | /* 'insert' [W] */ |
| 336 | entry = create_proc_entry("insert", |
| 337 | S_IWUGO, bay->proc); |
| 338 | if (!entry) |
| 339 | return -EIO; |
| 340 | else { |
| 341 | entry->proc_fops = &acpi_bay_insert_fops; |
| 342 | entry->data = bay; |
| 343 | entry->owner = THIS_MODULE; |
| 344 | } |
| 345 | #endif |
| 346 | return 0; |
| 347 | } |
| 348 | |
| 349 | static void acpi_bay_remove_fs(struct bay *bay) |
| 350 | { |
| 351 | if (!bay) |
| 352 | return; |
| 353 | |
| 354 | if (bay->proc) { |
| 355 | remove_proc_entry("status", bay->proc); |
| 356 | remove_proc_entry("eject", bay->proc); |
| 357 | #if 0 |
| 358 | remove_proc_entry("insert", bay->proc); |
| 359 | #endif |
| 360 | remove_proc_entry(bay->name, acpi_bay_dir); |
| 361 | bay->proc = NULL; |
| 362 | } |
| 363 | } |
| 364 | |
| 365 | static int bay_is_dock_device(acpi_handle handle) |
| 366 | { |
| 367 | acpi_handle parent; |
| 368 | |
| 369 | acpi_get_parent(handle, &parent); |
| 370 | |
| 371 | /* if the device or it's parent is dependent on the |
| 372 | * dock, then we are a dock device |
| 373 | */ |
| 374 | return (is_dock_device(handle) || is_dock_device(parent)); |
| 375 | } |
| 376 | |
| 377 | static int bay_add(acpi_handle handle) |
| 378 | { |
| 379 | acpi_status status; |
| 380 | struct bay *new_bay; |
| 381 | struct acpi_buffer nbuffer = {ACPI_ALLOCATE_BUFFER, NULL}; |
| 382 | acpi_get_name(handle, ACPI_FULL_PATHNAME, &nbuffer); |
| 383 | |
| 384 | bay_dprintk(handle, "Adding notify handler"); |
| 385 | |
| 386 | /* |
| 387 | * if this is the first bay device found, make the root |
| 388 | * proc entry |
| 389 | */ |
| 390 | if (acpi_bay_dir == NULL) |
| 391 | acpi_bay_dir = proc_mkdir(ACPI_BAY_CLASS, acpi_root_dir); |
| 392 | |
| 393 | /* |
| 394 | * Initialize bay device structure |
| 395 | */ |
| 396 | new_bay = kmalloc(GFP_ATOMIC, sizeof(*new_bay)); |
| 397 | INIT_LIST_HEAD(&new_bay->list); |
| 398 | new_bay->handle = handle; |
| 399 | new_bay->name = (char *)nbuffer.pointer; |
| 400 | list_add(&new_bay->list, &drive_bays); |
| 401 | acpi_bay_add_fs(new_bay); |
| 402 | |
| 403 | /* register for events on this device */ |
| 404 | status = acpi_install_notify_handler(handle, ACPI_SYSTEM_NOTIFY, |
| 405 | bay_notify, new_bay); |
| 406 | if (ACPI_FAILURE(status)) { |
| 407 | printk(KERN_ERR PREFIX "Error installing bay notify handler\n"); |
| 408 | } |
| 409 | |
| 410 | /* if we are on a dock station, we should register for dock |
| 411 | * notifications. |
| 412 | */ |
| 413 | if (bay_is_dock_device(handle)) { |
| 414 | bay_dprintk(handle, "Is dependent on dock\n"); |
| 415 | register_hotplug_dock_device(handle, bay_notify, new_bay); |
| 416 | } |
| 417 | printk(KERN_INFO PREFIX "Bay [%s] Added\n", new_bay->name); |
| 418 | return 0; |
| 419 | } |
| 420 | |
| 421 | static int acpi_bay_remove(struct acpi_device *device, int type) |
| 422 | { |
| 423 | /*** FIXME: do something here */ |
| 424 | return 0; |
| 425 | } |
| 426 | |
| 427 | static int acpi_bay_match(struct acpi_device *device, |
| 428 | struct acpi_driver *driver) |
| 429 | { |
| 430 | if (!device || !driver) |
| 431 | return -EINVAL; |
| 432 | |
| 433 | if (is_ejectable_bay(device->handle)) { |
| 434 | bay_dprintk(device->handle, "matching bay device"); |
| 435 | return 0; |
| 436 | } |
| 437 | |
| 438 | return -ENODEV; |
| 439 | } |
| 440 | |
| 441 | /** |
| 442 | * bay_create_acpi_device - add new devices to acpi |
| 443 | * @handle - handle of the device to add |
| 444 | * |
| 445 | * This function will create a new acpi_device for the given |
| 446 | * handle if one does not exist already. This should cause |
| 447 | * acpi to scan for drivers for the given devices, and call |
| 448 | * matching driver's add routine. |
| 449 | * |
| 450 | * Returns a pointer to the acpi_device corresponding to the handle. |
| 451 | */ |
| 452 | static struct acpi_device * bay_create_acpi_device(acpi_handle handle) |
| 453 | { |
| 454 | struct acpi_device *device = NULL; |
| 455 | struct acpi_device *parent_device; |
| 456 | acpi_handle parent; |
| 457 | int ret; |
| 458 | |
| 459 | bay_dprintk(handle, "Trying to get device"); |
| 460 | if (acpi_bus_get_device(handle, &device)) { |
| 461 | /* |
| 462 | * no device created for this object, |
| 463 | * so we should create one. |
| 464 | */ |
| 465 | bay_dprintk(handle, "No device for handle"); |
| 466 | acpi_get_parent(handle, &parent); |
| 467 | if (acpi_bus_get_device(parent, &parent_device)) |
| 468 | parent_device = NULL; |
| 469 | |
| 470 | ret = acpi_bus_add(&device, parent_device, handle, |
| 471 | ACPI_BUS_TYPE_DEVICE); |
| 472 | if (ret) { |
| 473 | pr_debug("error adding bus, %x\n", |
| 474 | -ret); |
| 475 | return NULL; |
| 476 | } |
| 477 | } |
| 478 | return device; |
| 479 | } |
| 480 | |
| 481 | /** |
| 482 | * bay_notify - act upon an acpi bay notification |
| 483 | * @handle: the bay handle |
| 484 | * @event: the acpi event |
| 485 | * @data: our driver data struct |
| 486 | * |
| 487 | */ |
| 488 | static void bay_notify(acpi_handle handle, u32 event, void *data) |
| 489 | { |
| 490 | struct acpi_device *dev; |
| 491 | struct bay *bay = data; |
| 492 | |
| 493 | bay_dprintk(handle, "Bay event"); |
| 494 | |
| 495 | switch(event) { |
| 496 | case ACPI_NOTIFY_BUS_CHECK: |
| 497 | printk("Bus Check\n"); |
| 498 | case ACPI_NOTIFY_DEVICE_CHECK: |
| 499 | printk("Device Check\n"); |
| 500 | dev = bay_create_acpi_device(handle); |
| 501 | if (dev) |
| 502 | acpi_bus_generate_event(dev, event, 0); |
| 503 | else |
| 504 | printk("No device for generating event\n"); |
| 505 | /* wouldn't it be a good idea to just rescan SATA |
| 506 | * right here? |
| 507 | */ |
| 508 | break; |
| 509 | case ACPI_NOTIFY_EJECT_REQUEST: |
| 510 | printk("Eject request\n"); |
| 511 | dev = bay_create_acpi_device(handle); |
| 512 | if (dev) |
| 513 | acpi_bus_generate_event(dev, event, 0); |
| 514 | else |
| 515 | printk("No device for generating eventn"); |
| 516 | |
| 517 | /* wouldn't it be a good idea to just call the |
| 518 | * eject_device here if we were a SATA device? |
| 519 | */ |
| 520 | break; |
| 521 | default: |
| 522 | printk("unknown event %d\n", event); |
| 523 | } |
| 524 | } |
| 525 | |
| 526 | static acpi_status |
| 527 | find_bay(acpi_handle handle, u32 lvl, void *context, void **rv) |
| 528 | { |
| 529 | int *count = (int *)context; |
| 530 | |
| 531 | /* |
| 532 | * there could be more than one ejectable bay. |
| 533 | * so, just return AE_OK always so that every object |
| 534 | * will be checked. |
| 535 | */ |
| 536 | if (is_ejectable_bay(handle)) { |
| 537 | bay_dprintk(handle, "found ejectable bay"); |
| 538 | bay_add(handle); |
| 539 | (*count)++; |
| 540 | } |
| 541 | return AE_OK; |
| 542 | } |
| 543 | |
| 544 | static int __init bay_init(void) |
| 545 | { |
| 546 | int bays = 0; |
| 547 | |
| 548 | acpi_bay_dir = NULL; |
| 549 | INIT_LIST_HEAD(&drive_bays); |
| 550 | |
| 551 | /* look for dockable drive bays */ |
| 552 | acpi_walk_namespace(ACPI_TYPE_DEVICE, ACPI_ROOT_OBJECT, |
| 553 | ACPI_UINT32_MAX, find_bay, &bays, NULL); |
| 554 | |
| 555 | if (bays) { |
| 556 | if ((acpi_bus_register_driver(&acpi_bay_driver) < 0)) { |
| 557 | printk(KERN_ERR "Unable to register bay driver\n"); |
| 558 | if (acpi_bay_dir) |
| 559 | remove_proc_entry(ACPI_BAY_CLASS, |
| 560 | acpi_root_dir); |
| 561 | } |
| 562 | } |
| 563 | |
| 564 | if (!bays) |
| 565 | return -ENODEV; |
| 566 | |
| 567 | return 0; |
| 568 | } |
| 569 | |
| 570 | static void __exit bay_exit(void) |
| 571 | { |
| 572 | struct bay *bay, *tmp; |
| 573 | |
| 574 | list_for_each_entry_safe(bay, tmp, &drive_bays, list) { |
| 575 | if (is_dock_device(bay->handle)) |
| 576 | unregister_hotplug_dock_device(bay->handle); |
| 577 | acpi_bay_remove_fs(bay); |
| 578 | acpi_remove_notify_handler(bay->handle, ACPI_SYSTEM_NOTIFY, |
| 579 | bay_notify); |
| 580 | kfree(bay->name); |
| 581 | kfree(bay); |
| 582 | } |
| 583 | |
| 584 | if (acpi_bay_dir) |
| 585 | remove_proc_entry(ACPI_BAY_CLASS, acpi_root_dir); |
| 586 | |
| 587 | acpi_bus_unregister_driver(&acpi_bay_driver); |
| 588 | } |
| 589 | |
| 590 | postcore_initcall(bay_init); |
| 591 | module_exit(bay_exit); |
| 592 | |