1 /* 2 * Eee PC WMI hotkey driver 3 * 4 * Copyright(C) 2010 Intel Corporation. 5 * Copyright(C) 2010 Corentin Chary <corentin.chary@gmail.com> 6 * 7 * Portions based on wistron_btns.c: 8 * Copyright (C) 2005 Miloslav Trmac <mitr@volny.cz> 9 * Copyright (C) 2005 Bernhard Rosenkraenzer <bero@arklinux.org> 10 * Copyright (C) 2005 Dmitry Torokhov <dtor@mail.ru> 11 * 12 * This program is free software; you can redistribute it and/or modify 13 * it under the terms of the GNU General Public License as published by 14 * the Free Software Foundation; either version 2 of the License, or 15 * (at your option) any later version. 16 * 17 * This program is distributed in the hope that it will be useful, 18 * but WITHOUT ANY WARRANTY; without even the implied warranty of 19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 20 * GNU General Public License for more details. 21 * 22 * You should have received a copy of the GNU General Public License 23 * along with this program; if not, write to the Free Software 24 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 25 */ 26 27 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 28 29 #include <linux/kernel.h> 30 #include <linux/module.h> 31 #include <linux/init.h> 32 #include <linux/types.h> 33 #include <linux/slab.h> 34 #include <linux/input.h> 35 #include <linux/input/sparse-keymap.h> 36 #include <linux/fb.h> 37 #include <linux/backlight.h> 38 #include <linux/leds.h> 39 #include <linux/rfkill.h> 40 #include <linux/pci.h> 41 #include <linux/pci_hotplug.h> 42 #include <linux/debugfs.h> 43 #include <linux/seq_file.h> 44 #include <linux/platform_device.h> 45 #include <linux/dmi.h> 46 #include <acpi/acpi_bus.h> 47 #include <acpi/acpi_drivers.h> 48 49 #define EEEPC_WMI_FILE "eeepc-wmi" 50 51 MODULE_AUTHOR("Yong Wang <yong.y.wang@intel.com>"); 52 MODULE_DESCRIPTION("Eee PC WMI Hotkey Driver"); 53 MODULE_LICENSE("GPL"); 54 55 #define EEEPC_ACPI_HID "ASUS010" /* old _HID used in eeepc-laptop */ 56 57 #define EEEPC_WMI_EVENT_GUID "ABBC0F72-8EA1-11D1-00A0-C90629100000" 58 #define EEEPC_WMI_MGMT_GUID "97845ED0-4E6D-11DE-8A39-0800200C9A66" 59 60 MODULE_ALIAS("wmi:"EEEPC_WMI_EVENT_GUID); 61 MODULE_ALIAS("wmi:"EEEPC_WMI_MGMT_GUID); 62 63 #define NOTIFY_BRNUP_MIN 0x11 64 #define NOTIFY_BRNUP_MAX 0x1f 65 #define NOTIFY_BRNDOWN_MIN 0x20 66 #define NOTIFY_BRNDOWN_MAX 0x2e 67 68 #define EEEPC_WMI_METHODID_DSTS 0x53544344 69 #define EEEPC_WMI_METHODID_DEVS 0x53564544 70 #define EEEPC_WMI_METHODID_CFVS 0x53564643 71 72 #define EEEPC_WMI_DEVID_WLAN 0x00010011 73 #define EEEPC_WMI_DEVID_BLUETOOTH 0x00010013 74 #define EEEPC_WMI_DEVID_WIMAX 0x00010017 75 #define EEEPC_WMI_DEVID_WWAN3G 0x00010019 76 #define EEEPC_WMI_DEVID_BACKLIGHT 0x00050012 77 #define EEEPC_WMI_DEVID_CAMERA 0x00060013 78 #define EEEPC_WMI_DEVID_CARDREADER 0x00080013 79 #define EEEPC_WMI_DEVID_TPDLED 0x00100011 80 81 #define EEEPC_WMI_DSTS_STATUS_BIT 0x00000001 82 #define EEEPC_WMI_DSTS_PRESENCE_BIT 0x00010000 83 84 static bool hotplug_wireless; 85 86 module_param(hotplug_wireless, bool, 0444); 87 MODULE_PARM_DESC(hotplug_wireless, 88 "Enable hotplug for wireless device. " 89 "If your laptop needs that, please report to " 90 "acpi4asus-user@lists.sourceforge.net."); 91 92 static const struct key_entry eeepc_wmi_keymap[] = { 93 /* Sleep already handled via generic ACPI code */ 94 { KE_IGNORE, NOTIFY_BRNDOWN_MIN, { KEY_BRIGHTNESSDOWN } }, 95 { KE_IGNORE, NOTIFY_BRNUP_MIN, { KEY_BRIGHTNESSUP } }, 96 { KE_KEY, 0x30, { KEY_VOLUMEUP } }, 97 { KE_KEY, 0x31, { KEY_VOLUMEDOWN } }, 98 { KE_KEY, 0x32, { KEY_MUTE } }, 99 { KE_KEY, 0x5c, { KEY_F15 } }, 100 { KE_KEY, 0x5d, { KEY_WLAN } }, 101 { KE_KEY, 0x6b, { KEY_F13 } }, /* Disable Touchpad */ 102 { KE_KEY, 0x88, { KEY_WLAN } }, 103 { KE_KEY, 0xcc, { KEY_SWITCHVIDEOMODE } }, 104 { KE_KEY, 0xe0, { KEY_PROG1 } }, 105 { KE_KEY, 0xe1, { KEY_F14 } }, 106 { KE_KEY, 0xe9, { KEY_DISPLAY_OFF } }, 107 { KE_END, 0}, 108 }; 109 110 struct bios_args { 111 u32 dev_id; 112 u32 ctrl_param; 113 }; 114 115 /* 116 * eeepc-wmi/ - debugfs root directory 117 * dev_id - current dev_id 118 * ctrl_param - current ctrl_param 119 * devs - call DEVS(dev_id, ctrl_param) and print result 120 * dsts - call DSTS(dev_id) and print result 121 */ 122 struct eeepc_wmi_debug { 123 struct dentry *root; 124 u32 dev_id; 125 u32 ctrl_param; 126 }; 127 128 struct eeepc_wmi { 129 bool hotplug_wireless; 130 131 struct input_dev *inputdev; 132 struct backlight_device *backlight_device; 133 struct platform_device *platform_device; 134 135 struct led_classdev tpd_led; 136 int tpd_led_wk; 137 struct workqueue_struct *led_workqueue; 138 struct work_struct tpd_led_work; 139 140 struct rfkill *wlan_rfkill; 141 struct rfkill *bluetooth_rfkill; 142 struct rfkill *wimax_rfkill; 143 struct rfkill *wwan3g_rfkill; 144 145 struct hotplug_slot *hotplug_slot; 146 struct mutex hotplug_lock; 147 struct mutex wmi_lock; 148 struct workqueue_struct *hotplug_workqueue; 149 struct work_struct hotplug_work; 150 151 struct eeepc_wmi_debug debug; 152 }; 153 154 static int eeepc_wmi_input_init(struct eeepc_wmi *eeepc) 155 { 156 int err; 157 158 eeepc->inputdev = input_allocate_device(); 159 if (!eeepc->inputdev) 160 return -ENOMEM; 161 162 eeepc->inputdev->name = "Eee PC WMI hotkeys"; 163 eeepc->inputdev->phys = EEEPC_WMI_FILE "/input0"; 164 eeepc->inputdev->id.bustype = BUS_HOST; 165 eeepc->inputdev->dev.parent = &eeepc->platform_device->dev; 166 167 err = sparse_keymap_setup(eeepc->inputdev, eeepc_wmi_keymap, NULL); 168 if (err) 169 goto err_free_dev; 170 171 err = input_register_device(eeepc->inputdev); 172 if (err) 173 goto err_free_keymap; 174 175 return 0; 176 177 err_free_keymap: 178 sparse_keymap_free(eeepc->inputdev); 179 err_free_dev: 180 input_free_device(eeepc->inputdev); 181 return err; 182 } 183 184 static void eeepc_wmi_input_exit(struct eeepc_wmi *eeepc) 185 { 186 if (eeepc->inputdev) { 187 sparse_keymap_free(eeepc->inputdev); 188 input_unregister_device(eeepc->inputdev); 189 } 190 191 eeepc->inputdev = NULL; 192 } 193 194 static acpi_status eeepc_wmi_get_devstate(u32 dev_id, u32 *retval) 195 { 196 struct acpi_buffer input = { (acpi_size)sizeof(u32), &dev_id }; 197 struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL }; 198 union acpi_object *obj; 199 acpi_status status; 200 u32 tmp; 201 202 status = wmi_evaluate_method(EEEPC_WMI_MGMT_GUID, 203 1, EEEPC_WMI_METHODID_DSTS, 204 &input, &output); 205 206 if (ACPI_FAILURE(status)) 207 return status; 208 209 obj = (union acpi_object *)output.pointer; 210 if (obj && obj->type == ACPI_TYPE_INTEGER) 211 tmp = (u32)obj->integer.value; 212 else 213 tmp = 0; 214 215 if (retval) 216 *retval = tmp; 217 218 kfree(obj); 219 220 return status; 221 222 } 223 224 static acpi_status eeepc_wmi_set_devstate(u32 dev_id, u32 ctrl_param, 225 u32 *retval) 226 { 227 struct bios_args args = { 228 .dev_id = dev_id, 229 .ctrl_param = ctrl_param, 230 }; 231 struct acpi_buffer input = { (acpi_size)sizeof(args), &args }; 232 acpi_status status; 233 234 if (!retval) { 235 status = wmi_evaluate_method(EEEPC_WMI_MGMT_GUID, 1, 236 EEEPC_WMI_METHODID_DEVS, 237 &input, NULL); 238 } else { 239 struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL }; 240 union acpi_object *obj; 241 u32 tmp; 242 243 status = wmi_evaluate_method(EEEPC_WMI_MGMT_GUID, 1, 244 EEEPC_WMI_METHODID_DEVS, 245 &input, &output); 246 247 if (ACPI_FAILURE(status)) 248 return status; 249 250 obj = (union acpi_object *)output.pointer; 251 if (obj && obj->type == ACPI_TYPE_INTEGER) 252 tmp = (u32)obj->integer.value; 253 else 254 tmp = 0; 255 256 *retval = tmp; 257 258 kfree(obj); 259 } 260 261 return status; 262 } 263 264 /* Helper for special devices with magic return codes */ 265 static int eeepc_wmi_get_devstate_simple(u32 dev_id) 266 { 267 u32 retval = 0; 268 acpi_status status; 269 270 status = eeepc_wmi_get_devstate(dev_id, &retval); 271 272 if (ACPI_FAILURE(status)) 273 return -EINVAL; 274 275 if (!(retval & EEEPC_WMI_DSTS_PRESENCE_BIT)) 276 return -ENODEV; 277 278 return retval & EEEPC_WMI_DSTS_STATUS_BIT; 279 } 280 281 /* 282 * LEDs 283 */ 284 /* 285 * These functions actually update the LED's, and are called from a 286 * workqueue. By doing this as separate work rather than when the LED 287 * subsystem asks, we avoid messing with the Eeepc ACPI stuff during a 288 * potentially bad time, such as a timer interrupt. 289 */ 290 static void tpd_led_update(struct work_struct *work) 291 { 292 int ctrl_param; 293 struct eeepc_wmi *eeepc; 294 295 eeepc = container_of(work, struct eeepc_wmi, tpd_led_work); 296 297 ctrl_param = eeepc->tpd_led_wk; 298 eeepc_wmi_set_devstate(EEEPC_WMI_DEVID_TPDLED, ctrl_param, NULL); 299 } 300 301 static void tpd_led_set(struct led_classdev *led_cdev, 302 enum led_brightness value) 303 { 304 struct eeepc_wmi *eeepc; 305 306 eeepc = container_of(led_cdev, struct eeepc_wmi, tpd_led); 307 308 eeepc->tpd_led_wk = !!value; 309 queue_work(eeepc->led_workqueue, &eeepc->tpd_led_work); 310 } 311 312 static int read_tpd_state(struct eeepc_wmi *eeepc) 313 { 314 return eeepc_wmi_get_devstate_simple(EEEPC_WMI_DEVID_TPDLED); 315 } 316 317 static enum led_brightness tpd_led_get(struct led_classdev *led_cdev) 318 { 319 struct eeepc_wmi *eeepc; 320 321 eeepc = container_of(led_cdev, struct eeepc_wmi, tpd_led); 322 323 return read_tpd_state(eeepc); 324 } 325 326 static int eeepc_wmi_led_init(struct eeepc_wmi *eeepc) 327 { 328 int rv; 329 330 if (read_tpd_state(eeepc) < 0) 331 return 0; 332 333 eeepc->led_workqueue = create_singlethread_workqueue("led_workqueue"); 334 if (!eeepc->led_workqueue) 335 return -ENOMEM; 336 INIT_WORK(&eeepc->tpd_led_work, tpd_led_update); 337 338 eeepc->tpd_led.name = "eeepc::touchpad"; 339 eeepc->tpd_led.brightness_set = tpd_led_set; 340 eeepc->tpd_led.brightness_get = tpd_led_get; 341 eeepc->tpd_led.max_brightness = 1; 342 343 rv = led_classdev_register(&eeepc->platform_device->dev, 344 &eeepc->tpd_led); 345 if (rv) { 346 destroy_workqueue(eeepc->led_workqueue); 347 return rv; 348 } 349 350 return 0; 351 } 352 353 static void eeepc_wmi_led_exit(struct eeepc_wmi *eeepc) 354 { 355 if (eeepc->tpd_led.dev) 356 led_classdev_unregister(&eeepc->tpd_led); 357 if (eeepc->led_workqueue) 358 destroy_workqueue(eeepc->led_workqueue); 359 } 360 361 /* 362 * PCI hotplug (for wlan rfkill) 363 */ 364 static bool eeepc_wlan_rfkill_blocked(struct eeepc_wmi *eeepc) 365 { 366 int result = eeepc_wmi_get_devstate_simple(EEEPC_WMI_DEVID_WLAN); 367 368 if (result < 0) 369 return false; 370 return !result; 371 } 372 373 static void eeepc_rfkill_hotplug(struct eeepc_wmi *eeepc) 374 { 375 struct pci_dev *dev; 376 struct pci_bus *bus; 377 bool blocked; 378 bool absent; 379 u32 l; 380 381 mutex_lock(&eeepc->wmi_lock); 382 blocked = eeepc_wlan_rfkill_blocked(eeepc); 383 mutex_unlock(&eeepc->wmi_lock); 384 385 mutex_lock(&eeepc->hotplug_lock); 386 387 if (eeepc->wlan_rfkill) 388 rfkill_set_sw_state(eeepc->wlan_rfkill, blocked); 389 390 if (eeepc->hotplug_slot) { 391 bus = pci_find_bus(0, 1); 392 if (!bus) { 393 pr_warning("Unable to find PCI bus 1?\n"); 394 goto out_unlock; 395 } 396 397 if (pci_bus_read_config_dword(bus, 0, PCI_VENDOR_ID, &l)) { 398 pr_err("Unable to read PCI config space?\n"); 399 goto out_unlock; 400 } 401 absent = (l == 0xffffffff); 402 403 if (blocked != absent) { 404 pr_warning("BIOS says wireless lan is %s, " 405 "but the pci device is %s\n", 406 blocked ? "blocked" : "unblocked", 407 absent ? "absent" : "present"); 408 pr_warning("skipped wireless hotplug as probably " 409 "inappropriate for this model\n"); 410 goto out_unlock; 411 } 412 413 if (!blocked) { 414 dev = pci_get_slot(bus, 0); 415 if (dev) { 416 /* Device already present */ 417 pci_dev_put(dev); 418 goto out_unlock; 419 } 420 dev = pci_scan_single_device(bus, 0); 421 if (dev) { 422 pci_bus_assign_resources(bus); 423 if (pci_bus_add_device(dev)) 424 pr_err("Unable to hotplug wifi\n"); 425 } 426 } else { 427 dev = pci_get_slot(bus, 0); 428 if (dev) { 429 pci_remove_bus_device(dev); 430 pci_dev_put(dev); 431 } 432 } 433 } 434 435 out_unlock: 436 mutex_unlock(&eeepc->hotplug_lock); 437 } 438 439 static void eeepc_rfkill_notify(acpi_handle handle, u32 event, void *data) 440 { 441 struct eeepc_wmi *eeepc = data; 442 443 if (event != ACPI_NOTIFY_BUS_CHECK) 444 return; 445 446 /* 447 * We can't call directly eeepc_rfkill_hotplug because most 448 * of the time WMBC is still being executed and not reetrant. 449 * There is currently no way to tell ACPICA that we want this 450 * method to be serialized, we schedule a eeepc_rfkill_hotplug 451 * call later, in a safer context. 452 */ 453 queue_work(eeepc->hotplug_workqueue, &eeepc->hotplug_work); 454 } 455 456 static int eeepc_register_rfkill_notifier(struct eeepc_wmi *eeepc, 457 char *node) 458 { 459 acpi_status status; 460 acpi_handle handle; 461 462 status = acpi_get_handle(NULL, node, &handle); 463 464 if (ACPI_SUCCESS(status)) { 465 status = acpi_install_notify_handler(handle, 466 ACPI_SYSTEM_NOTIFY, 467 eeepc_rfkill_notify, 468 eeepc); 469 if (ACPI_FAILURE(status)) 470 pr_warning("Failed to register notify on %s\n", node); 471 } else 472 return -ENODEV; 473 474 return 0; 475 } 476 477 static void eeepc_unregister_rfkill_notifier(struct eeepc_wmi *eeepc, 478 char *node) 479 { 480 acpi_status status = AE_OK; 481 acpi_handle handle; 482 483 status = acpi_get_handle(NULL, node, &handle); 484 485 if (ACPI_SUCCESS(status)) { 486 status = acpi_remove_notify_handler(handle, 487 ACPI_SYSTEM_NOTIFY, 488 eeepc_rfkill_notify); 489 if (ACPI_FAILURE(status)) 490 pr_err("Error removing rfkill notify handler %s\n", 491 node); 492 } 493 } 494 495 static int eeepc_get_adapter_status(struct hotplug_slot *hotplug_slot, 496 u8 *value) 497 { 498 int result = eeepc_wmi_get_devstate_simple(EEEPC_WMI_DEVID_WLAN); 499 500 if (result < 0) 501 return result; 502 503 *value = !!result; 504 return 0; 505 } 506 507 static void eeepc_cleanup_pci_hotplug(struct hotplug_slot *hotplug_slot) 508 { 509 kfree(hotplug_slot->info); 510 kfree(hotplug_slot); 511 } 512 513 static struct hotplug_slot_ops eeepc_hotplug_slot_ops = { 514 .owner = THIS_MODULE, 515 .get_adapter_status = eeepc_get_adapter_status, 516 .get_power_status = eeepc_get_adapter_status, 517 }; 518 519 static void eeepc_hotplug_work(struct work_struct *work) 520 { 521 struct eeepc_wmi *eeepc; 522 523 eeepc = container_of(work, struct eeepc_wmi, hotplug_work); 524 eeepc_rfkill_hotplug(eeepc); 525 } 526 527 static int eeepc_setup_pci_hotplug(struct eeepc_wmi *eeepc) 528 { 529 int ret = -ENOMEM; 530 struct pci_bus *bus = pci_find_bus(0, 1); 531 532 if (!bus) { 533 pr_err("Unable to find wifi PCI bus\n"); 534 return -ENODEV; 535 } 536 537 eeepc->hotplug_workqueue = 538 create_singlethread_workqueue("hotplug_workqueue"); 539 if (!eeepc->hotplug_workqueue) 540 goto error_workqueue; 541 542 INIT_WORK(&eeepc->hotplug_work, eeepc_hotplug_work); 543 544 eeepc->hotplug_slot = kzalloc(sizeof(struct hotplug_slot), GFP_KERNEL); 545 if (!eeepc->hotplug_slot) 546 goto error_slot; 547 548 eeepc->hotplug_slot->info = kzalloc(sizeof(struct hotplug_slot_info), 549 GFP_KERNEL); 550 if (!eeepc->hotplug_slot->info) 551 goto error_info; 552 553 eeepc->hotplug_slot->private = eeepc; 554 eeepc->hotplug_slot->release = &eeepc_cleanup_pci_hotplug; 555 eeepc->hotplug_slot->ops = &eeepc_hotplug_slot_ops; 556 eeepc_get_adapter_status(eeepc->hotplug_slot, 557 &eeepc->hotplug_slot->info->adapter_status); 558 559 ret = pci_hp_register(eeepc->hotplug_slot, bus, 0, "eeepc-wifi"); 560 if (ret) { 561 pr_err("Unable to register hotplug slot - %d\n", ret); 562 goto error_register; 563 } 564 565 return 0; 566 567 error_register: 568 kfree(eeepc->hotplug_slot->info); 569 error_info: 570 kfree(eeepc->hotplug_slot); 571 eeepc->hotplug_slot = NULL; 572 error_slot: 573 destroy_workqueue(eeepc->hotplug_workqueue); 574 error_workqueue: 575 return ret; 576 } 577 578 /* 579 * Rfkill devices 580 */ 581 static int eeepc_rfkill_set(void *data, bool blocked) 582 { 583 int dev_id = (unsigned long)data; 584 u32 ctrl_param = !blocked; 585 acpi_status status; 586 587 status = eeepc_wmi_set_devstate(dev_id, ctrl_param, NULL); 588 589 if (ACPI_FAILURE(status)) 590 return -EIO; 591 592 return 0; 593 } 594 595 static void eeepc_rfkill_query(struct rfkill *rfkill, void *data) 596 { 597 int dev_id = (unsigned long)data; 598 int result; 599 600 result = eeepc_wmi_get_devstate_simple(dev_id); 601 602 if (result < 0) 603 return ; 604 605 rfkill_set_sw_state(rfkill, !result); 606 } 607 608 static int eeepc_rfkill_wlan_set(void *data, bool blocked) 609 { 610 struct eeepc_wmi *eeepc = data; 611 int ret; 612 613 /* 614 * This handler is enabled only if hotplug is enabled. 615 * In this case, the eeepc_wmi_set_devstate() will 616 * trigger a wmi notification and we need to wait 617 * this call to finish before being able to call 618 * any wmi method 619 */ 620 mutex_lock(&eeepc->wmi_lock); 621 ret = eeepc_rfkill_set((void *)(long)EEEPC_WMI_DEVID_WLAN, blocked); 622 mutex_unlock(&eeepc->wmi_lock); 623 return ret; 624 } 625 626 static void eeepc_rfkill_wlan_query(struct rfkill *rfkill, void *data) 627 { 628 eeepc_rfkill_query(rfkill, (void *)(long)EEEPC_WMI_DEVID_WLAN); 629 } 630 631 static const struct rfkill_ops eeepc_rfkill_wlan_ops = { 632 .set_block = eeepc_rfkill_wlan_set, 633 .query = eeepc_rfkill_wlan_query, 634 }; 635 636 static const struct rfkill_ops eeepc_rfkill_ops = { 637 .set_block = eeepc_rfkill_set, 638 .query = eeepc_rfkill_query, 639 }; 640 641 static int eeepc_new_rfkill(struct eeepc_wmi *eeepc, 642 struct rfkill **rfkill, 643 const char *name, 644 enum rfkill_type type, int dev_id) 645 { 646 int result = eeepc_wmi_get_devstate_simple(dev_id); 647 648 if (result < 0) 649 return result; 650 651 if (dev_id == EEEPC_WMI_DEVID_WLAN && eeepc->hotplug_wireless) 652 *rfkill = rfkill_alloc(name, &eeepc->platform_device->dev, type, 653 &eeepc_rfkill_wlan_ops, eeepc); 654 else 655 *rfkill = rfkill_alloc(name, &eeepc->platform_device->dev, type, 656 &eeepc_rfkill_ops, (void *)(long)dev_id); 657 658 if (!*rfkill) 659 return -EINVAL; 660 661 rfkill_init_sw_state(*rfkill, !result); 662 result = rfkill_register(*rfkill); 663 if (result) { 664 rfkill_destroy(*rfkill); 665 *rfkill = NULL; 666 return result; 667 } 668 return 0; 669 } 670 671 static void eeepc_wmi_rfkill_exit(struct eeepc_wmi *eeepc) 672 { 673 eeepc_unregister_rfkill_notifier(eeepc, "\\_SB.PCI0.P0P5"); 674 eeepc_unregister_rfkill_notifier(eeepc, "\\_SB.PCI0.P0P6"); 675 eeepc_unregister_rfkill_notifier(eeepc, "\\_SB.PCI0.P0P7"); 676 if (eeepc->wlan_rfkill) { 677 rfkill_unregister(eeepc->wlan_rfkill); 678 rfkill_destroy(eeepc->wlan_rfkill); 679 eeepc->wlan_rfkill = NULL; 680 } 681 /* 682 * Refresh pci hotplug in case the rfkill state was changed after 683 * eeepc_unregister_rfkill_notifier() 684 */ 685 eeepc_rfkill_hotplug(eeepc); 686 if (eeepc->hotplug_slot) 687 pci_hp_deregister(eeepc->hotplug_slot); 688 if (eeepc->hotplug_workqueue) 689 destroy_workqueue(eeepc->hotplug_workqueue); 690 691 if (eeepc->bluetooth_rfkill) { 692 rfkill_unregister(eeepc->bluetooth_rfkill); 693 rfkill_destroy(eeepc->bluetooth_rfkill); 694 eeepc->bluetooth_rfkill = NULL; 695 } 696 if (eeepc->wimax_rfkill) { 697 rfkill_unregister(eeepc->wimax_rfkill); 698 rfkill_destroy(eeepc->wimax_rfkill); 699 eeepc->wimax_rfkill = NULL; 700 } 701 if (eeepc->wwan3g_rfkill) { 702 rfkill_unregister(eeepc->wwan3g_rfkill); 703 rfkill_destroy(eeepc->wwan3g_rfkill); 704 eeepc->wwan3g_rfkill = NULL; 705 } 706 } 707 708 static int eeepc_wmi_rfkill_init(struct eeepc_wmi *eeepc) 709 { 710 int result = 0; 711 712 mutex_init(&eeepc->hotplug_lock); 713 mutex_init(&eeepc->wmi_lock); 714 715 result = eeepc_new_rfkill(eeepc, &eeepc->wlan_rfkill, 716 "eeepc-wlan", RFKILL_TYPE_WLAN, 717 EEEPC_WMI_DEVID_WLAN); 718 719 if (result && result != -ENODEV) 720 goto exit; 721 722 result = eeepc_new_rfkill(eeepc, &eeepc->bluetooth_rfkill, 723 "eeepc-bluetooth", RFKILL_TYPE_BLUETOOTH, 724 EEEPC_WMI_DEVID_BLUETOOTH); 725 726 if (result && result != -ENODEV) 727 goto exit; 728 729 result = eeepc_new_rfkill(eeepc, &eeepc->wimax_rfkill, 730 "eeepc-wimax", RFKILL_TYPE_WIMAX, 731 EEEPC_WMI_DEVID_WIMAX); 732 733 if (result && result != -ENODEV) 734 goto exit; 735 736 result = eeepc_new_rfkill(eeepc, &eeepc->wwan3g_rfkill, 737 "eeepc-wwan3g", RFKILL_TYPE_WWAN, 738 EEEPC_WMI_DEVID_WWAN3G); 739 740 if (result && result != -ENODEV) 741 goto exit; 742 743 result = eeepc_setup_pci_hotplug(eeepc); 744 /* 745 * If we get -EBUSY then something else is handling the PCI hotplug - 746 * don't fail in this case 747 */ 748 if (result == -EBUSY) 749 result = 0; 750 751 eeepc_register_rfkill_notifier(eeepc, "\\_SB.PCI0.P0P5"); 752 eeepc_register_rfkill_notifier(eeepc, "\\_SB.PCI0.P0P6"); 753 eeepc_register_rfkill_notifier(eeepc, "\\_SB.PCI0.P0P7"); 754 /* 755 * Refresh pci hotplug in case the rfkill state was changed during 756 * setup. 757 */ 758 eeepc_rfkill_hotplug(eeepc); 759 760 exit: 761 if (result && result != -ENODEV) 762 eeepc_wmi_rfkill_exit(eeepc); 763 764 if (result == -ENODEV) 765 result = 0; 766 767 return result; 768 } 769 770 /* 771 * Backlight 772 */ 773 static int read_brightness(struct backlight_device *bd) 774 { 775 u32 retval; 776 acpi_status status; 777 778 status = eeepc_wmi_get_devstate(EEEPC_WMI_DEVID_BACKLIGHT, &retval); 779 780 if (ACPI_FAILURE(status)) 781 return -1; 782 else 783 return retval & 0xFF; 784 } 785 786 static int update_bl_status(struct backlight_device *bd) 787 { 788 789 u32 ctrl_param; 790 acpi_status status; 791 792 ctrl_param = bd->props.brightness; 793 794 status = eeepc_wmi_set_devstate(EEEPC_WMI_DEVID_BACKLIGHT, 795 ctrl_param, NULL); 796 797 if (ACPI_FAILURE(status)) 798 return -1; 799 else 800 return 0; 801 } 802 803 static const struct backlight_ops eeepc_wmi_bl_ops = { 804 .get_brightness = read_brightness, 805 .update_status = update_bl_status, 806 }; 807 808 static int eeepc_wmi_backlight_notify(struct eeepc_wmi *eeepc, int code) 809 { 810 struct backlight_device *bd = eeepc->backlight_device; 811 int old = bd->props.brightness; 812 int new = old; 813 814 if (code >= NOTIFY_BRNUP_MIN && code <= NOTIFY_BRNUP_MAX) 815 new = code - NOTIFY_BRNUP_MIN + 1; 816 else if (code >= NOTIFY_BRNDOWN_MIN && code <= NOTIFY_BRNDOWN_MAX) 817 new = code - NOTIFY_BRNDOWN_MIN; 818 819 bd->props.brightness = new; 820 backlight_update_status(bd); 821 backlight_force_update(bd, BACKLIGHT_UPDATE_HOTKEY); 822 823 return old; 824 } 825 826 static int eeepc_wmi_backlight_init(struct eeepc_wmi *eeepc) 827 { 828 struct backlight_device *bd; 829 struct backlight_properties props; 830 831 memset(&props, 0, sizeof(struct backlight_properties)); 832 props.max_brightness = 15; 833 bd = backlight_device_register(EEEPC_WMI_FILE, 834 &eeepc->platform_device->dev, eeepc, 835 &eeepc_wmi_bl_ops, &props); 836 if (IS_ERR(bd)) { 837 pr_err("Could not register backlight device\n"); 838 return PTR_ERR(bd); 839 } 840 841 eeepc->backlight_device = bd; 842 843 bd->props.brightness = read_brightness(bd); 844 bd->props.power = FB_BLANK_UNBLANK; 845 backlight_update_status(bd); 846 847 return 0; 848 } 849 850 static void eeepc_wmi_backlight_exit(struct eeepc_wmi *eeepc) 851 { 852 if (eeepc->backlight_device) 853 backlight_device_unregister(eeepc->backlight_device); 854 855 eeepc->backlight_device = NULL; 856 } 857 858 static void eeepc_wmi_notify(u32 value, void *context) 859 { 860 struct eeepc_wmi *eeepc = context; 861 struct acpi_buffer response = { ACPI_ALLOCATE_BUFFER, NULL }; 862 union acpi_object *obj; 863 acpi_status status; 864 int code; 865 int orig_code; 866 867 status = wmi_get_event_data(value, &response); 868 if (status != AE_OK) { 869 pr_err("bad event status 0x%x\n", status); 870 return; 871 } 872 873 obj = (union acpi_object *)response.pointer; 874 875 if (obj && obj->type == ACPI_TYPE_INTEGER) { 876 code = obj->integer.value; 877 orig_code = code; 878 879 if (code >= NOTIFY_BRNUP_MIN && code <= NOTIFY_BRNUP_MAX) 880 code = NOTIFY_BRNUP_MIN; 881 else if (code >= NOTIFY_BRNDOWN_MIN && 882 code <= NOTIFY_BRNDOWN_MAX) 883 code = NOTIFY_BRNDOWN_MIN; 884 885 if (code == NOTIFY_BRNUP_MIN || code == NOTIFY_BRNDOWN_MIN) { 886 if (!acpi_video_backlight_support()) 887 eeepc_wmi_backlight_notify(eeepc, orig_code); 888 } 889 890 if (!sparse_keymap_report_event(eeepc->inputdev, 891 code, 1, true)) 892 pr_info("Unknown key %x pressed\n", code); 893 } 894 895 kfree(obj); 896 } 897 898 /* 899 * Sys helpers 900 */ 901 static int parse_arg(const char *buf, unsigned long count, int *val) 902 { 903 if (!count) 904 return 0; 905 if (sscanf(buf, "%i", val) != 1) 906 return -EINVAL; 907 return count; 908 } 909 910 static ssize_t store_sys_wmi(int devid, const char *buf, size_t count) 911 { 912 acpi_status status; 913 u32 retval; 914 int rv, value; 915 916 value = eeepc_wmi_get_devstate_simple(devid); 917 if (value == -ENODEV) /* Check device presence */ 918 return value; 919 920 rv = parse_arg(buf, count, &value); 921 status = eeepc_wmi_set_devstate(devid, value, &retval); 922 923 if (ACPI_FAILURE(status)) 924 return -EIO; 925 return rv; 926 } 927 928 static ssize_t show_sys_wmi(int devid, char *buf) 929 { 930 int value = eeepc_wmi_get_devstate_simple(devid); 931 932 if (value < 0) 933 return value; 934 935 return sprintf(buf, "%d\n", value); 936 } 937 938 #define EEEPC_WMI_CREATE_DEVICE_ATTR(_name, _mode, _cm) \ 939 static ssize_t show_##_name(struct device *dev, \ 940 struct device_attribute *attr, \ 941 char *buf) \ 942 { \ 943 return show_sys_wmi(_cm, buf); \ 944 } \ 945 static ssize_t store_##_name(struct device *dev, \ 946 struct device_attribute *attr, \ 947 const char *buf, size_t count) \ 948 { \ 949 return store_sys_wmi(_cm, buf, count); \ 950 } \ 951 static struct device_attribute dev_attr_##_name = { \ 952 .attr = { \ 953 .name = __stringify(_name), \ 954 .mode = _mode }, \ 955 .show = show_##_name, \ 956 .store = store_##_name, \ 957 } 958 959 EEEPC_WMI_CREATE_DEVICE_ATTR(camera, 0644, EEEPC_WMI_DEVID_CAMERA); 960 EEEPC_WMI_CREATE_DEVICE_ATTR(cardr, 0644, EEEPC_WMI_DEVID_CARDREADER); 961 962 static ssize_t store_cpufv(struct device *dev, struct device_attribute *attr, 963 const char *buf, size_t count) 964 { 965 int value; 966 struct acpi_buffer input = { (acpi_size)sizeof(value), &value }; 967 acpi_status status; 968 969 if (!count || sscanf(buf, "%i", &value) != 1) 970 return -EINVAL; 971 if (value < 0 || value > 2) 972 return -EINVAL; 973 974 status = wmi_evaluate_method(EEEPC_WMI_MGMT_GUID, 975 1, EEEPC_WMI_METHODID_CFVS, &input, NULL); 976 977 if (ACPI_FAILURE(status)) 978 return -EIO; 979 else 980 return count; 981 } 982 983 static DEVICE_ATTR(cpufv, S_IRUGO | S_IWUSR, NULL, store_cpufv); 984 985 static struct attribute *platform_attributes[] = { 986 &dev_attr_cpufv.attr, 987 &dev_attr_camera.attr, 988 &dev_attr_cardr.attr, 989 NULL 990 }; 991 992 static mode_t eeepc_sysfs_is_visible(struct kobject *kobj, 993 struct attribute *attr, 994 int idx) 995 { 996 bool supported = true; 997 int devid = -1; 998 999 if (attr == &dev_attr_camera.attr) 1000 devid = EEEPC_WMI_DEVID_CAMERA; 1001 else if (attr == &dev_attr_cardr.attr) 1002 devid = EEEPC_WMI_DEVID_CARDREADER; 1003 1004 if (devid != -1) 1005 supported = eeepc_wmi_get_devstate_simple(devid) != -ENODEV; 1006 1007 return supported ? attr->mode : 0; 1008 } 1009 1010 static struct attribute_group platform_attribute_group = { 1011 .is_visible = eeepc_sysfs_is_visible, 1012 .attrs = platform_attributes 1013 }; 1014 1015 static void eeepc_wmi_sysfs_exit(struct platform_device *device) 1016 { 1017 sysfs_remove_group(&device->dev.kobj, &platform_attribute_group); 1018 } 1019 1020 static int eeepc_wmi_sysfs_init(struct platform_device *device) 1021 { 1022 return sysfs_create_group(&device->dev.kobj, &platform_attribute_group); 1023 } 1024 1025 /* 1026 * Platform device 1027 */ 1028 static int __init eeepc_wmi_platform_init(struct eeepc_wmi *eeepc) 1029 { 1030 return eeepc_wmi_sysfs_init(eeepc->platform_device); 1031 } 1032 1033 static void eeepc_wmi_platform_exit(struct eeepc_wmi *eeepc) 1034 { 1035 eeepc_wmi_sysfs_exit(eeepc->platform_device); 1036 } 1037 1038 /* 1039 * debugfs 1040 */ 1041 struct eeepc_wmi_debugfs_node { 1042 struct eeepc_wmi *eeepc; 1043 char *name; 1044 int (*show)(struct seq_file *m, void *data); 1045 }; 1046 1047 static int show_dsts(struct seq_file *m, void *data) 1048 { 1049 struct eeepc_wmi *eeepc = m->private; 1050 acpi_status status; 1051 u32 retval = -1; 1052 1053 status = eeepc_wmi_get_devstate(eeepc->debug.dev_id, &retval); 1054 1055 if (ACPI_FAILURE(status)) 1056 return -EIO; 1057 1058 seq_printf(m, "DSTS(%x) = %x\n", eeepc->debug.dev_id, retval); 1059 1060 return 0; 1061 } 1062 1063 static int show_devs(struct seq_file *m, void *data) 1064 { 1065 struct eeepc_wmi *eeepc = m->private; 1066 acpi_status status; 1067 u32 retval = -1; 1068 1069 status = eeepc_wmi_set_devstate(eeepc->debug.dev_id, 1070 eeepc->debug.ctrl_param, &retval); 1071 if (ACPI_FAILURE(status)) 1072 return -EIO; 1073 1074 seq_printf(m, "DEVS(%x, %x) = %x\n", eeepc->debug.dev_id, 1075 eeepc->debug.ctrl_param, retval); 1076 1077 return 0; 1078 } 1079 1080 static struct eeepc_wmi_debugfs_node eeepc_wmi_debug_files[] = { 1081 { NULL, "devs", show_devs }, 1082 { NULL, "dsts", show_dsts }, 1083 }; 1084 1085 static int eeepc_wmi_debugfs_open(struct inode *inode, struct file *file) 1086 { 1087 struct eeepc_wmi_debugfs_node *node = inode->i_private; 1088 1089 return single_open(file, node->show, node->eeepc); 1090 } 1091 1092 static const struct file_operations eeepc_wmi_debugfs_io_ops = { 1093 .owner = THIS_MODULE, 1094 .open = eeepc_wmi_debugfs_open, 1095 .read = seq_read, 1096 .llseek = seq_lseek, 1097 .release = single_release, 1098 }; 1099 1100 static void eeepc_wmi_debugfs_exit(struct eeepc_wmi *eeepc) 1101 { 1102 debugfs_remove_recursive(eeepc->debug.root); 1103 } 1104 1105 static int eeepc_wmi_debugfs_init(struct eeepc_wmi *eeepc) 1106 { 1107 struct dentry *dent; 1108 int i; 1109 1110 eeepc->debug.root = debugfs_create_dir(EEEPC_WMI_FILE, NULL); 1111 if (!eeepc->debug.root) { 1112 pr_err("failed to create debugfs directory"); 1113 goto error_debugfs; 1114 } 1115 1116 dent = debugfs_create_x32("dev_id", S_IRUGO|S_IWUSR, 1117 eeepc->debug.root, &eeepc->debug.dev_id); 1118 if (!dent) 1119 goto error_debugfs; 1120 1121 dent = debugfs_create_x32("ctrl_param", S_IRUGO|S_IWUSR, 1122 eeepc->debug.root, &eeepc->debug.ctrl_param); 1123 if (!dent) 1124 goto error_debugfs; 1125 1126 for (i = 0; i < ARRAY_SIZE(eeepc_wmi_debug_files); i++) { 1127 struct eeepc_wmi_debugfs_node *node = &eeepc_wmi_debug_files[i]; 1128 1129 node->eeepc = eeepc; 1130 dent = debugfs_create_file(node->name, S_IFREG | S_IRUGO, 1131 eeepc->debug.root, node, 1132 &eeepc_wmi_debugfs_io_ops); 1133 if (!dent) { 1134 pr_err("failed to create debug file: %s\n", node->name); 1135 goto error_debugfs; 1136 } 1137 } 1138 1139 return 0; 1140 1141 error_debugfs: 1142 eeepc_wmi_debugfs_exit(eeepc); 1143 return -ENOMEM; 1144 } 1145 1146 /* 1147 * WMI Driver 1148 */ 1149 static void eeepc_dmi_check(struct eeepc_wmi *eeepc) 1150 { 1151 const char *model; 1152 1153 model = dmi_get_system_info(DMI_PRODUCT_NAME); 1154 if (!model) 1155 return; 1156 1157 /* 1158 * Whitelist for wlan hotplug 1159 * 1160 * Eeepc 1000H needs the current hotplug code to handle 1161 * Fn+F2 correctly. We may add other Eeepc here later, but 1162 * it seems that most of the laptops supported by eeepc-wmi 1163 * don't need to be on this list 1164 */ 1165 if (strcmp(model, "1000H") == 0) { 1166 eeepc->hotplug_wireless = true; 1167 pr_info("wlan hotplug enabled\n"); 1168 } 1169 } 1170 1171 static int __init eeepc_wmi_add(struct platform_device *pdev) 1172 { 1173 struct eeepc_wmi *eeepc; 1174 acpi_status status; 1175 int err; 1176 1177 eeepc = kzalloc(sizeof(struct eeepc_wmi), GFP_KERNEL); 1178 if (!eeepc) 1179 return -ENOMEM; 1180 1181 eeepc->platform_device = pdev; 1182 platform_set_drvdata(eeepc->platform_device, eeepc); 1183 1184 eeepc->hotplug_wireless = hotplug_wireless; 1185 eeepc_dmi_check(eeepc); 1186 1187 err = eeepc_wmi_platform_init(eeepc); 1188 if (err) 1189 goto fail_platform; 1190 1191 err = eeepc_wmi_input_init(eeepc); 1192 if (err) 1193 goto fail_input; 1194 1195 err = eeepc_wmi_led_init(eeepc); 1196 if (err) 1197 goto fail_leds; 1198 1199 err = eeepc_wmi_rfkill_init(eeepc); 1200 if (err) 1201 goto fail_rfkill; 1202 1203 if (!acpi_video_backlight_support()) { 1204 err = eeepc_wmi_backlight_init(eeepc); 1205 if (err) 1206 goto fail_backlight; 1207 } else 1208 pr_info("Backlight controlled by ACPI video driver\n"); 1209 1210 status = wmi_install_notify_handler(EEEPC_WMI_EVENT_GUID, 1211 eeepc_wmi_notify, eeepc); 1212 if (ACPI_FAILURE(status)) { 1213 pr_err("Unable to register notify handler - %d\n", 1214 status); 1215 err = -ENODEV; 1216 goto fail_wmi_handler; 1217 } 1218 1219 err = eeepc_wmi_debugfs_init(eeepc); 1220 if (err) 1221 goto fail_debugfs; 1222 1223 return 0; 1224 1225 fail_debugfs: 1226 wmi_remove_notify_handler(EEEPC_WMI_EVENT_GUID); 1227 fail_wmi_handler: 1228 eeepc_wmi_backlight_exit(eeepc); 1229 fail_backlight: 1230 eeepc_wmi_rfkill_exit(eeepc); 1231 fail_rfkill: 1232 eeepc_wmi_led_exit(eeepc); 1233 fail_leds: 1234 eeepc_wmi_input_exit(eeepc); 1235 fail_input: 1236 eeepc_wmi_platform_exit(eeepc); 1237 fail_platform: 1238 kfree(eeepc); 1239 return err; 1240 } 1241 1242 static int __exit eeepc_wmi_remove(struct platform_device *device) 1243 { 1244 struct eeepc_wmi *eeepc; 1245 1246 eeepc = platform_get_drvdata(device); 1247 wmi_remove_notify_handler(EEEPC_WMI_EVENT_GUID); 1248 eeepc_wmi_backlight_exit(eeepc); 1249 eeepc_wmi_input_exit(eeepc); 1250 eeepc_wmi_led_exit(eeepc); 1251 eeepc_wmi_rfkill_exit(eeepc); 1252 eeepc_wmi_debugfs_exit(eeepc); 1253 eeepc_wmi_platform_exit(eeepc); 1254 1255 kfree(eeepc); 1256 return 0; 1257 } 1258 1259 /* 1260 * Platform driver - hibernate/resume callbacks 1261 */ 1262 static int eeepc_hotk_thaw(struct device *device) 1263 { 1264 struct eeepc_wmi *eeepc = dev_get_drvdata(device); 1265 1266 if (eeepc->wlan_rfkill) { 1267 bool wlan; 1268 1269 /* 1270 * Work around bios bug - acpi _PTS turns off the wireless led 1271 * during suspend. Normally it restores it on resume, but 1272 * we should kick it ourselves in case hibernation is aborted. 1273 */ 1274 wlan = eeepc_wmi_get_devstate_simple(EEEPC_WMI_DEVID_WLAN); 1275 eeepc_wmi_set_devstate(EEEPC_WMI_DEVID_WLAN, wlan, NULL); 1276 } 1277 1278 return 0; 1279 } 1280 1281 static int eeepc_hotk_restore(struct device *device) 1282 { 1283 struct eeepc_wmi *eeepc = dev_get_drvdata(device); 1284 int bl; 1285 1286 /* Refresh both wlan rfkill state and pci hotplug */ 1287 if (eeepc->wlan_rfkill) 1288 eeepc_rfkill_hotplug(eeepc); 1289 1290 if (eeepc->bluetooth_rfkill) { 1291 bl = !eeepc_wmi_get_devstate_simple(EEEPC_WMI_DEVID_BLUETOOTH); 1292 rfkill_set_sw_state(eeepc->bluetooth_rfkill, bl); 1293 } 1294 if (eeepc->wimax_rfkill) { 1295 bl = !eeepc_wmi_get_devstate_simple(EEEPC_WMI_DEVID_WIMAX); 1296 rfkill_set_sw_state(eeepc->wimax_rfkill, bl); 1297 } 1298 if (eeepc->wwan3g_rfkill) { 1299 bl = !eeepc_wmi_get_devstate_simple(EEEPC_WMI_DEVID_WWAN3G); 1300 rfkill_set_sw_state(eeepc->wwan3g_rfkill, bl); 1301 } 1302 1303 return 0; 1304 } 1305 1306 static const struct dev_pm_ops eeepc_pm_ops = { 1307 .thaw = eeepc_hotk_thaw, 1308 .restore = eeepc_hotk_restore, 1309 }; 1310 1311 static struct platform_driver platform_driver = { 1312 .remove = __exit_p(eeepc_wmi_remove), 1313 .driver = { 1314 .name = EEEPC_WMI_FILE, 1315 .owner = THIS_MODULE, 1316 .pm = &eeepc_pm_ops, 1317 }, 1318 }; 1319 1320 static acpi_status __init eeepc_wmi_parse_device(acpi_handle handle, u32 level, 1321 void *context, void **retval) 1322 { 1323 pr_warning("Found legacy ATKD device (%s)", EEEPC_ACPI_HID); 1324 *(bool *)context = true; 1325 return AE_CTRL_TERMINATE; 1326 } 1327 1328 static int __init eeepc_wmi_check_atkd(void) 1329 { 1330 acpi_status status; 1331 bool found = false; 1332 1333 status = acpi_get_devices(EEEPC_ACPI_HID, eeepc_wmi_parse_device, 1334 &found, NULL); 1335 1336 if (ACPI_FAILURE(status) || !found) 1337 return 0; 1338 return -1; 1339 } 1340 1341 static int __init eeepc_wmi_probe(struct platform_device *pdev) 1342 { 1343 if (!wmi_has_guid(EEEPC_WMI_EVENT_GUID) || 1344 !wmi_has_guid(EEEPC_WMI_MGMT_GUID)) { 1345 pr_warning("No known WMI GUID found\n"); 1346 return -ENODEV; 1347 } 1348 1349 if (eeepc_wmi_check_atkd()) { 1350 pr_warning("WMI device present, but legacy ATKD device is also " 1351 "present and enabled."); 1352 pr_warning("You probably booted with acpi_osi=\"Linux\" or " 1353 "acpi_osi=\"!Windows 2009\""); 1354 pr_warning("Can't load eeepc-wmi, use default acpi_osi " 1355 "(preferred) or eeepc-laptop"); 1356 return -ENODEV; 1357 } 1358 1359 return eeepc_wmi_add(pdev); 1360 } 1361 1362 static struct platform_device *platform_device; 1363 1364 static int __init eeepc_wmi_init(void) 1365 { 1366 platform_device = platform_create_bundle(&platform_driver, 1367 eeepc_wmi_probe, 1368 NULL, 0, NULL, 0); 1369 if (IS_ERR(platform_device)) 1370 return PTR_ERR(platform_device); 1371 return 0; 1372 } 1373 1374 static void __exit eeepc_wmi_exit(void) 1375 { 1376 platform_device_unregister(platform_device); 1377 platform_driver_unregister(&platform_driver); 1378 } 1379 1380 module_init(eeepc_wmi_init); 1381 module_exit(eeepc_wmi_exit); 1382