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 0x00050011 77 #define EEEPC_WMI_DEVID_BRIGHTNESS 0x00050012 78 #define EEEPC_WMI_DEVID_CAMERA 0x00060013 79 #define EEEPC_WMI_DEVID_CARDREADER 0x00080013 80 #define EEEPC_WMI_DEVID_TPDLED 0x00100011 81 82 #define EEEPC_WMI_DSTS_STATUS_BIT 0x00000001 83 #define EEEPC_WMI_DSTS_PRESENCE_BIT 0x00010000 84 #define EEEPC_WMI_DSTS_BRIGHTNESS_MASK 0x000000FF 85 #define EEEPC_WMI_DSTS_MAX_BRIGTH_MASK 0x0000FF00 86 87 static bool hotplug_wireless; 88 89 module_param(hotplug_wireless, bool, 0444); 90 MODULE_PARM_DESC(hotplug_wireless, 91 "Enable hotplug for wireless device. " 92 "If your laptop needs that, please report to " 93 "acpi4asus-user@lists.sourceforge.net."); 94 95 static const struct key_entry eeepc_wmi_keymap[] = { 96 /* Sleep already handled via generic ACPI code */ 97 { KE_IGNORE, NOTIFY_BRNDOWN_MIN, { KEY_BRIGHTNESSDOWN } }, 98 { KE_IGNORE, NOTIFY_BRNUP_MIN, { KEY_BRIGHTNESSUP } }, 99 { KE_KEY, 0x30, { KEY_VOLUMEUP } }, 100 { KE_KEY, 0x31, { KEY_VOLUMEDOWN } }, 101 { KE_KEY, 0x32, { KEY_MUTE } }, 102 { KE_KEY, 0x5c, { KEY_F15 } }, 103 { KE_KEY, 0x5d, { KEY_WLAN } }, 104 { KE_KEY, 0x6b, { KEY_F13 } }, /* Disable Touchpad */ 105 { KE_KEY, 0x88, { KEY_WLAN } }, 106 { KE_KEY, 0xcc, { KEY_SWITCHVIDEOMODE } }, 107 { KE_KEY, 0xe0, { KEY_PROG1 } }, 108 { KE_KEY, 0xe1, { KEY_F14 } }, 109 { KE_KEY, 0xe9, { KEY_BRIGHTNESS_ZERO } }, 110 { KE_END, 0}, 111 }; 112 113 struct bios_args { 114 u32 dev_id; 115 u32 ctrl_param; 116 }; 117 118 /* 119 * eeepc-wmi/ - debugfs root directory 120 * dev_id - current dev_id 121 * ctrl_param - current ctrl_param 122 * devs - call DEVS(dev_id, ctrl_param) and print result 123 * dsts - call DSTS(dev_id) and print result 124 */ 125 struct eeepc_wmi_debug { 126 struct dentry *root; 127 u32 dev_id; 128 u32 ctrl_param; 129 }; 130 131 struct eeepc_wmi { 132 bool hotplug_wireless; 133 134 struct input_dev *inputdev; 135 struct backlight_device *backlight_device; 136 struct platform_device *platform_device; 137 138 struct led_classdev tpd_led; 139 int tpd_led_wk; 140 struct workqueue_struct *led_workqueue; 141 struct work_struct tpd_led_work; 142 143 struct rfkill *wlan_rfkill; 144 struct rfkill *bluetooth_rfkill; 145 struct rfkill *wimax_rfkill; 146 struct rfkill *wwan3g_rfkill; 147 148 struct hotplug_slot *hotplug_slot; 149 struct mutex hotplug_lock; 150 struct mutex wmi_lock; 151 struct workqueue_struct *hotplug_workqueue; 152 struct work_struct hotplug_work; 153 154 struct eeepc_wmi_debug debug; 155 }; 156 157 static int eeepc_wmi_input_init(struct eeepc_wmi *eeepc) 158 { 159 int err; 160 161 eeepc->inputdev = input_allocate_device(); 162 if (!eeepc->inputdev) 163 return -ENOMEM; 164 165 eeepc->inputdev->name = "Eee PC WMI hotkeys"; 166 eeepc->inputdev->phys = EEEPC_WMI_FILE "/input0"; 167 eeepc->inputdev->id.bustype = BUS_HOST; 168 eeepc->inputdev->dev.parent = &eeepc->platform_device->dev; 169 170 err = sparse_keymap_setup(eeepc->inputdev, eeepc_wmi_keymap, NULL); 171 if (err) 172 goto err_free_dev; 173 174 err = input_register_device(eeepc->inputdev); 175 if (err) 176 goto err_free_keymap; 177 178 return 0; 179 180 err_free_keymap: 181 sparse_keymap_free(eeepc->inputdev); 182 err_free_dev: 183 input_free_device(eeepc->inputdev); 184 return err; 185 } 186 187 static void eeepc_wmi_input_exit(struct eeepc_wmi *eeepc) 188 { 189 if (eeepc->inputdev) { 190 sparse_keymap_free(eeepc->inputdev); 191 input_unregister_device(eeepc->inputdev); 192 } 193 194 eeepc->inputdev = NULL; 195 } 196 197 static acpi_status eeepc_wmi_get_devstate(u32 dev_id, u32 *retval) 198 { 199 struct acpi_buffer input = { (acpi_size)sizeof(u32), &dev_id }; 200 struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL }; 201 union acpi_object *obj; 202 acpi_status status; 203 u32 tmp; 204 205 status = wmi_evaluate_method(EEEPC_WMI_MGMT_GUID, 206 1, EEEPC_WMI_METHODID_DSTS, 207 &input, &output); 208 209 if (ACPI_FAILURE(status)) 210 return status; 211 212 obj = (union acpi_object *)output.pointer; 213 if (obj && obj->type == ACPI_TYPE_INTEGER) 214 tmp = (u32)obj->integer.value; 215 else 216 tmp = 0; 217 218 if (retval) 219 *retval = tmp; 220 221 kfree(obj); 222 223 return status; 224 225 } 226 227 static acpi_status eeepc_wmi_set_devstate(u32 dev_id, u32 ctrl_param, 228 u32 *retval) 229 { 230 struct bios_args args = { 231 .dev_id = dev_id, 232 .ctrl_param = ctrl_param, 233 }; 234 struct acpi_buffer input = { (acpi_size)sizeof(args), &args }; 235 acpi_status status; 236 237 if (!retval) { 238 status = wmi_evaluate_method(EEEPC_WMI_MGMT_GUID, 1, 239 EEEPC_WMI_METHODID_DEVS, 240 &input, NULL); 241 } else { 242 struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL }; 243 union acpi_object *obj; 244 u32 tmp; 245 246 status = wmi_evaluate_method(EEEPC_WMI_MGMT_GUID, 1, 247 EEEPC_WMI_METHODID_DEVS, 248 &input, &output); 249 250 if (ACPI_FAILURE(status)) 251 return status; 252 253 obj = (union acpi_object *)output.pointer; 254 if (obj && obj->type == ACPI_TYPE_INTEGER) 255 tmp = (u32)obj->integer.value; 256 else 257 tmp = 0; 258 259 *retval = tmp; 260 261 kfree(obj); 262 } 263 264 return status; 265 } 266 267 /* Helper for special devices with magic return codes */ 268 static int eeepc_wmi_get_devstate_bits(u32 dev_id, u32 mask) 269 { 270 u32 retval = 0; 271 acpi_status status; 272 273 status = eeepc_wmi_get_devstate(dev_id, &retval); 274 275 if (ACPI_FAILURE(status)) 276 return -EINVAL; 277 278 if (!(retval & EEEPC_WMI_DSTS_PRESENCE_BIT)) 279 return -ENODEV; 280 281 return retval & mask; 282 } 283 284 static int eeepc_wmi_get_devstate_simple(u32 dev_id) 285 { 286 return eeepc_wmi_get_devstate_bits(dev_id, EEEPC_WMI_DSTS_STATUS_BIT); 287 } 288 289 /* 290 * LEDs 291 */ 292 /* 293 * These functions actually update the LED's, and are called from a 294 * workqueue. By doing this as separate work rather than when the LED 295 * subsystem asks, we avoid messing with the Eeepc ACPI stuff during a 296 * potentially bad time, such as a timer interrupt. 297 */ 298 static void tpd_led_update(struct work_struct *work) 299 { 300 int ctrl_param; 301 struct eeepc_wmi *eeepc; 302 303 eeepc = container_of(work, struct eeepc_wmi, tpd_led_work); 304 305 ctrl_param = eeepc->tpd_led_wk; 306 eeepc_wmi_set_devstate(EEEPC_WMI_DEVID_TPDLED, ctrl_param, NULL); 307 } 308 309 static void tpd_led_set(struct led_classdev *led_cdev, 310 enum led_brightness value) 311 { 312 struct eeepc_wmi *eeepc; 313 314 eeepc = container_of(led_cdev, struct eeepc_wmi, tpd_led); 315 316 eeepc->tpd_led_wk = !!value; 317 queue_work(eeepc->led_workqueue, &eeepc->tpd_led_work); 318 } 319 320 static int read_tpd_state(struct eeepc_wmi *eeepc) 321 { 322 return eeepc_wmi_get_devstate_simple(EEEPC_WMI_DEVID_TPDLED); 323 } 324 325 static enum led_brightness tpd_led_get(struct led_classdev *led_cdev) 326 { 327 struct eeepc_wmi *eeepc; 328 329 eeepc = container_of(led_cdev, struct eeepc_wmi, tpd_led); 330 331 return read_tpd_state(eeepc); 332 } 333 334 static int eeepc_wmi_led_init(struct eeepc_wmi *eeepc) 335 { 336 int rv; 337 338 if (read_tpd_state(eeepc) < 0) 339 return 0; 340 341 eeepc->led_workqueue = create_singlethread_workqueue("led_workqueue"); 342 if (!eeepc->led_workqueue) 343 return -ENOMEM; 344 INIT_WORK(&eeepc->tpd_led_work, tpd_led_update); 345 346 eeepc->tpd_led.name = "eeepc::touchpad"; 347 eeepc->tpd_led.brightness_set = tpd_led_set; 348 eeepc->tpd_led.brightness_get = tpd_led_get; 349 eeepc->tpd_led.max_brightness = 1; 350 351 rv = led_classdev_register(&eeepc->platform_device->dev, 352 &eeepc->tpd_led); 353 if (rv) { 354 destroy_workqueue(eeepc->led_workqueue); 355 return rv; 356 } 357 358 return 0; 359 } 360 361 static void eeepc_wmi_led_exit(struct eeepc_wmi *eeepc) 362 { 363 if (eeepc->tpd_led.dev) 364 led_classdev_unregister(&eeepc->tpd_led); 365 if (eeepc->led_workqueue) 366 destroy_workqueue(eeepc->led_workqueue); 367 } 368 369 /* 370 * PCI hotplug (for wlan rfkill) 371 */ 372 static bool eeepc_wlan_rfkill_blocked(struct eeepc_wmi *eeepc) 373 { 374 int result = eeepc_wmi_get_devstate_simple(EEEPC_WMI_DEVID_WLAN); 375 376 if (result < 0) 377 return false; 378 return !result; 379 } 380 381 static void eeepc_rfkill_hotplug(struct eeepc_wmi *eeepc) 382 { 383 struct pci_dev *dev; 384 struct pci_bus *bus; 385 bool blocked; 386 bool absent; 387 u32 l; 388 389 mutex_lock(&eeepc->wmi_lock); 390 blocked = eeepc_wlan_rfkill_blocked(eeepc); 391 mutex_unlock(&eeepc->wmi_lock); 392 393 mutex_lock(&eeepc->hotplug_lock); 394 395 if (eeepc->wlan_rfkill) 396 rfkill_set_sw_state(eeepc->wlan_rfkill, blocked); 397 398 if (eeepc->hotplug_slot) { 399 bus = pci_find_bus(0, 1); 400 if (!bus) { 401 pr_warning("Unable to find PCI bus 1?\n"); 402 goto out_unlock; 403 } 404 405 if (pci_bus_read_config_dword(bus, 0, PCI_VENDOR_ID, &l)) { 406 pr_err("Unable to read PCI config space?\n"); 407 goto out_unlock; 408 } 409 absent = (l == 0xffffffff); 410 411 if (blocked != absent) { 412 pr_warning("BIOS says wireless lan is %s, " 413 "but the pci device is %s\n", 414 blocked ? "blocked" : "unblocked", 415 absent ? "absent" : "present"); 416 pr_warning("skipped wireless hotplug as probably " 417 "inappropriate for this model\n"); 418 goto out_unlock; 419 } 420 421 if (!blocked) { 422 dev = pci_get_slot(bus, 0); 423 if (dev) { 424 /* Device already present */ 425 pci_dev_put(dev); 426 goto out_unlock; 427 } 428 dev = pci_scan_single_device(bus, 0); 429 if (dev) { 430 pci_bus_assign_resources(bus); 431 if (pci_bus_add_device(dev)) 432 pr_err("Unable to hotplug wifi\n"); 433 } 434 } else { 435 dev = pci_get_slot(bus, 0); 436 if (dev) { 437 pci_remove_bus_device(dev); 438 pci_dev_put(dev); 439 } 440 } 441 } 442 443 out_unlock: 444 mutex_unlock(&eeepc->hotplug_lock); 445 } 446 447 static void eeepc_rfkill_notify(acpi_handle handle, u32 event, void *data) 448 { 449 struct eeepc_wmi *eeepc = data; 450 451 if (event != ACPI_NOTIFY_BUS_CHECK) 452 return; 453 454 /* 455 * We can't call directly eeepc_rfkill_hotplug because most 456 * of the time WMBC is still being executed and not reetrant. 457 * There is currently no way to tell ACPICA that we want this 458 * method to be serialized, we schedule a eeepc_rfkill_hotplug 459 * call later, in a safer context. 460 */ 461 queue_work(eeepc->hotplug_workqueue, &eeepc->hotplug_work); 462 } 463 464 static int eeepc_register_rfkill_notifier(struct eeepc_wmi *eeepc, 465 char *node) 466 { 467 acpi_status status; 468 acpi_handle handle; 469 470 status = acpi_get_handle(NULL, node, &handle); 471 472 if (ACPI_SUCCESS(status)) { 473 status = acpi_install_notify_handler(handle, 474 ACPI_SYSTEM_NOTIFY, 475 eeepc_rfkill_notify, 476 eeepc); 477 if (ACPI_FAILURE(status)) 478 pr_warning("Failed to register notify on %s\n", node); 479 } else 480 return -ENODEV; 481 482 return 0; 483 } 484 485 static void eeepc_unregister_rfkill_notifier(struct eeepc_wmi *eeepc, 486 char *node) 487 { 488 acpi_status status = AE_OK; 489 acpi_handle handle; 490 491 status = acpi_get_handle(NULL, node, &handle); 492 493 if (ACPI_SUCCESS(status)) { 494 status = acpi_remove_notify_handler(handle, 495 ACPI_SYSTEM_NOTIFY, 496 eeepc_rfkill_notify); 497 if (ACPI_FAILURE(status)) 498 pr_err("Error removing rfkill notify handler %s\n", 499 node); 500 } 501 } 502 503 static int eeepc_get_adapter_status(struct hotplug_slot *hotplug_slot, 504 u8 *value) 505 { 506 int result = eeepc_wmi_get_devstate_simple(EEEPC_WMI_DEVID_WLAN); 507 508 if (result < 0) 509 return result; 510 511 *value = !!result; 512 return 0; 513 } 514 515 static void eeepc_cleanup_pci_hotplug(struct hotplug_slot *hotplug_slot) 516 { 517 kfree(hotplug_slot->info); 518 kfree(hotplug_slot); 519 } 520 521 static struct hotplug_slot_ops eeepc_hotplug_slot_ops = { 522 .owner = THIS_MODULE, 523 .get_adapter_status = eeepc_get_adapter_status, 524 .get_power_status = eeepc_get_adapter_status, 525 }; 526 527 static void eeepc_hotplug_work(struct work_struct *work) 528 { 529 struct eeepc_wmi *eeepc; 530 531 eeepc = container_of(work, struct eeepc_wmi, hotplug_work); 532 eeepc_rfkill_hotplug(eeepc); 533 } 534 535 static int eeepc_setup_pci_hotplug(struct eeepc_wmi *eeepc) 536 { 537 int ret = -ENOMEM; 538 struct pci_bus *bus = pci_find_bus(0, 1); 539 540 if (!bus) { 541 pr_err("Unable to find wifi PCI bus\n"); 542 return -ENODEV; 543 } 544 545 eeepc->hotplug_workqueue = 546 create_singlethread_workqueue("hotplug_workqueue"); 547 if (!eeepc->hotplug_workqueue) 548 goto error_workqueue; 549 550 INIT_WORK(&eeepc->hotplug_work, eeepc_hotplug_work); 551 552 eeepc->hotplug_slot = kzalloc(sizeof(struct hotplug_slot), GFP_KERNEL); 553 if (!eeepc->hotplug_slot) 554 goto error_slot; 555 556 eeepc->hotplug_slot->info = kzalloc(sizeof(struct hotplug_slot_info), 557 GFP_KERNEL); 558 if (!eeepc->hotplug_slot->info) 559 goto error_info; 560 561 eeepc->hotplug_slot->private = eeepc; 562 eeepc->hotplug_slot->release = &eeepc_cleanup_pci_hotplug; 563 eeepc->hotplug_slot->ops = &eeepc_hotplug_slot_ops; 564 eeepc_get_adapter_status(eeepc->hotplug_slot, 565 &eeepc->hotplug_slot->info->adapter_status); 566 567 ret = pci_hp_register(eeepc->hotplug_slot, bus, 0, "eeepc-wifi"); 568 if (ret) { 569 pr_err("Unable to register hotplug slot - %d\n", ret); 570 goto error_register; 571 } 572 573 return 0; 574 575 error_register: 576 kfree(eeepc->hotplug_slot->info); 577 error_info: 578 kfree(eeepc->hotplug_slot); 579 eeepc->hotplug_slot = NULL; 580 error_slot: 581 destroy_workqueue(eeepc->hotplug_workqueue); 582 error_workqueue: 583 return ret; 584 } 585 586 /* 587 * Rfkill devices 588 */ 589 static int eeepc_rfkill_set(void *data, bool blocked) 590 { 591 int dev_id = (unsigned long)data; 592 u32 ctrl_param = !blocked; 593 acpi_status status; 594 595 status = eeepc_wmi_set_devstate(dev_id, ctrl_param, NULL); 596 597 if (ACPI_FAILURE(status)) 598 return -EIO; 599 600 return 0; 601 } 602 603 static void eeepc_rfkill_query(struct rfkill *rfkill, void *data) 604 { 605 int dev_id = (unsigned long)data; 606 int result; 607 608 result = eeepc_wmi_get_devstate_simple(dev_id); 609 610 if (result < 0) 611 return ; 612 613 rfkill_set_sw_state(rfkill, !result); 614 } 615 616 static int eeepc_rfkill_wlan_set(void *data, bool blocked) 617 { 618 struct eeepc_wmi *eeepc = data; 619 int ret; 620 621 /* 622 * This handler is enabled only if hotplug is enabled. 623 * In this case, the eeepc_wmi_set_devstate() will 624 * trigger a wmi notification and we need to wait 625 * this call to finish before being able to call 626 * any wmi method 627 */ 628 mutex_lock(&eeepc->wmi_lock); 629 ret = eeepc_rfkill_set((void *)(long)EEEPC_WMI_DEVID_WLAN, blocked); 630 mutex_unlock(&eeepc->wmi_lock); 631 return ret; 632 } 633 634 static void eeepc_rfkill_wlan_query(struct rfkill *rfkill, void *data) 635 { 636 eeepc_rfkill_query(rfkill, (void *)(long)EEEPC_WMI_DEVID_WLAN); 637 } 638 639 static const struct rfkill_ops eeepc_rfkill_wlan_ops = { 640 .set_block = eeepc_rfkill_wlan_set, 641 .query = eeepc_rfkill_wlan_query, 642 }; 643 644 static const struct rfkill_ops eeepc_rfkill_ops = { 645 .set_block = eeepc_rfkill_set, 646 .query = eeepc_rfkill_query, 647 }; 648 649 static int eeepc_new_rfkill(struct eeepc_wmi *eeepc, 650 struct rfkill **rfkill, 651 const char *name, 652 enum rfkill_type type, int dev_id) 653 { 654 int result = eeepc_wmi_get_devstate_simple(dev_id); 655 656 if (result < 0) 657 return result; 658 659 if (dev_id == EEEPC_WMI_DEVID_WLAN && eeepc->hotplug_wireless) 660 *rfkill = rfkill_alloc(name, &eeepc->platform_device->dev, type, 661 &eeepc_rfkill_wlan_ops, eeepc); 662 else 663 *rfkill = rfkill_alloc(name, &eeepc->platform_device->dev, type, 664 &eeepc_rfkill_ops, (void *)(long)dev_id); 665 666 if (!*rfkill) 667 return -EINVAL; 668 669 rfkill_init_sw_state(*rfkill, !result); 670 result = rfkill_register(*rfkill); 671 if (result) { 672 rfkill_destroy(*rfkill); 673 *rfkill = NULL; 674 return result; 675 } 676 return 0; 677 } 678 679 static void eeepc_wmi_rfkill_exit(struct eeepc_wmi *eeepc) 680 { 681 eeepc_unregister_rfkill_notifier(eeepc, "\\_SB.PCI0.P0P5"); 682 eeepc_unregister_rfkill_notifier(eeepc, "\\_SB.PCI0.P0P6"); 683 eeepc_unregister_rfkill_notifier(eeepc, "\\_SB.PCI0.P0P7"); 684 if (eeepc->wlan_rfkill) { 685 rfkill_unregister(eeepc->wlan_rfkill); 686 rfkill_destroy(eeepc->wlan_rfkill); 687 eeepc->wlan_rfkill = NULL; 688 } 689 /* 690 * Refresh pci hotplug in case the rfkill state was changed after 691 * eeepc_unregister_rfkill_notifier() 692 */ 693 eeepc_rfkill_hotplug(eeepc); 694 if (eeepc->hotplug_slot) 695 pci_hp_deregister(eeepc->hotplug_slot); 696 if (eeepc->hotplug_workqueue) 697 destroy_workqueue(eeepc->hotplug_workqueue); 698 699 if (eeepc->bluetooth_rfkill) { 700 rfkill_unregister(eeepc->bluetooth_rfkill); 701 rfkill_destroy(eeepc->bluetooth_rfkill); 702 eeepc->bluetooth_rfkill = NULL; 703 } 704 if (eeepc->wimax_rfkill) { 705 rfkill_unregister(eeepc->wimax_rfkill); 706 rfkill_destroy(eeepc->wimax_rfkill); 707 eeepc->wimax_rfkill = NULL; 708 } 709 if (eeepc->wwan3g_rfkill) { 710 rfkill_unregister(eeepc->wwan3g_rfkill); 711 rfkill_destroy(eeepc->wwan3g_rfkill); 712 eeepc->wwan3g_rfkill = NULL; 713 } 714 } 715 716 static int eeepc_wmi_rfkill_init(struct eeepc_wmi *eeepc) 717 { 718 int result = 0; 719 720 mutex_init(&eeepc->hotplug_lock); 721 mutex_init(&eeepc->wmi_lock); 722 723 result = eeepc_new_rfkill(eeepc, &eeepc->wlan_rfkill, 724 "eeepc-wlan", RFKILL_TYPE_WLAN, 725 EEEPC_WMI_DEVID_WLAN); 726 727 if (result && result != -ENODEV) 728 goto exit; 729 730 result = eeepc_new_rfkill(eeepc, &eeepc->bluetooth_rfkill, 731 "eeepc-bluetooth", RFKILL_TYPE_BLUETOOTH, 732 EEEPC_WMI_DEVID_BLUETOOTH); 733 734 if (result && result != -ENODEV) 735 goto exit; 736 737 result = eeepc_new_rfkill(eeepc, &eeepc->wimax_rfkill, 738 "eeepc-wimax", RFKILL_TYPE_WIMAX, 739 EEEPC_WMI_DEVID_WIMAX); 740 741 if (result && result != -ENODEV) 742 goto exit; 743 744 result = eeepc_new_rfkill(eeepc, &eeepc->wwan3g_rfkill, 745 "eeepc-wwan3g", RFKILL_TYPE_WWAN, 746 EEEPC_WMI_DEVID_WWAN3G); 747 748 if (result && result != -ENODEV) 749 goto exit; 750 751 result = eeepc_setup_pci_hotplug(eeepc); 752 /* 753 * If we get -EBUSY then something else is handling the PCI hotplug - 754 * don't fail in this case 755 */ 756 if (result == -EBUSY) 757 result = 0; 758 759 eeepc_register_rfkill_notifier(eeepc, "\\_SB.PCI0.P0P5"); 760 eeepc_register_rfkill_notifier(eeepc, "\\_SB.PCI0.P0P6"); 761 eeepc_register_rfkill_notifier(eeepc, "\\_SB.PCI0.P0P7"); 762 /* 763 * Refresh pci hotplug in case the rfkill state was changed during 764 * setup. 765 */ 766 eeepc_rfkill_hotplug(eeepc); 767 768 exit: 769 if (result && result != -ENODEV) 770 eeepc_wmi_rfkill_exit(eeepc); 771 772 if (result == -ENODEV) 773 result = 0; 774 775 return result; 776 } 777 778 /* 779 * Backlight 780 */ 781 static int read_backlight_power(void) 782 { 783 int ret = eeepc_wmi_get_devstate_simple(EEEPC_WMI_DEVID_BACKLIGHT); 784 785 if (ret < 0) 786 return ret; 787 788 return ret ? FB_BLANK_UNBLANK : FB_BLANK_POWERDOWN; 789 } 790 791 static int read_brightness(struct backlight_device *bd) 792 { 793 u32 retval; 794 acpi_status status; 795 796 status = eeepc_wmi_get_devstate(EEEPC_WMI_DEVID_BRIGHTNESS, &retval); 797 798 if (ACPI_FAILURE(status)) 799 return -EIO; 800 else 801 return retval & EEEPC_WMI_DSTS_BRIGHTNESS_MASK; 802 } 803 804 static int update_bl_status(struct backlight_device *bd) 805 { 806 u32 ctrl_param; 807 acpi_status status; 808 int power; 809 810 ctrl_param = bd->props.brightness; 811 812 status = eeepc_wmi_set_devstate(EEEPC_WMI_DEVID_BRIGHTNESS, 813 ctrl_param, NULL); 814 815 if (ACPI_FAILURE(status)) 816 return -EIO; 817 818 power = read_backlight_power(); 819 if (power != -ENODEV && bd->props.power != power) { 820 ctrl_param = !!(bd->props.power == FB_BLANK_UNBLANK); 821 status = eeepc_wmi_set_devstate(EEEPC_WMI_DEVID_BACKLIGHT, 822 ctrl_param, NULL); 823 824 if (ACPI_FAILURE(status)) 825 return -EIO; 826 } 827 return 0; 828 } 829 830 static const struct backlight_ops eeepc_wmi_bl_ops = { 831 .get_brightness = read_brightness, 832 .update_status = update_bl_status, 833 }; 834 835 static int eeepc_wmi_backlight_notify(struct eeepc_wmi *eeepc, int code) 836 { 837 struct backlight_device *bd = eeepc->backlight_device; 838 int old = bd->props.brightness; 839 int new = old; 840 841 if (code >= NOTIFY_BRNUP_MIN && code <= NOTIFY_BRNUP_MAX) 842 new = code - NOTIFY_BRNUP_MIN + 1; 843 else if (code >= NOTIFY_BRNDOWN_MIN && code <= NOTIFY_BRNDOWN_MAX) 844 new = code - NOTIFY_BRNDOWN_MIN; 845 846 bd->props.brightness = new; 847 backlight_update_status(bd); 848 backlight_force_update(bd, BACKLIGHT_UPDATE_HOTKEY); 849 850 return old; 851 } 852 853 static int eeepc_wmi_backlight_init(struct eeepc_wmi *eeepc) 854 { 855 struct backlight_device *bd; 856 struct backlight_properties props; 857 int max; 858 int power; 859 860 max = eeepc_wmi_get_devstate_bits(EEEPC_WMI_DEVID_BRIGHTNESS, 861 EEEPC_WMI_DSTS_MAX_BRIGTH_MASK); 862 power = read_backlight_power(); 863 864 if (max < 0 && power < 0) { 865 /* Try to keep the original error */ 866 if (max == -ENODEV && power == -ENODEV) 867 return -ENODEV; 868 if (max != -ENODEV) 869 return max; 870 else 871 return power; 872 } 873 if (max == -ENODEV) 874 max = 0; 875 if (power == -ENODEV) 876 power = FB_BLANK_UNBLANK; 877 878 memset(&props, 0, sizeof(struct backlight_properties)); 879 props.max_brightness = max; 880 bd = backlight_device_register(EEEPC_WMI_FILE, 881 &eeepc->platform_device->dev, eeepc, 882 &eeepc_wmi_bl_ops, &props); 883 if (IS_ERR(bd)) { 884 pr_err("Could not register backlight device\n"); 885 return PTR_ERR(bd); 886 } 887 888 eeepc->backlight_device = bd; 889 890 bd->props.brightness = read_brightness(bd); 891 bd->props.power = power; 892 backlight_update_status(bd); 893 894 return 0; 895 } 896 897 static void eeepc_wmi_backlight_exit(struct eeepc_wmi *eeepc) 898 { 899 if (eeepc->backlight_device) 900 backlight_device_unregister(eeepc->backlight_device); 901 902 eeepc->backlight_device = NULL; 903 } 904 905 static void eeepc_wmi_notify(u32 value, void *context) 906 { 907 struct eeepc_wmi *eeepc = context; 908 struct acpi_buffer response = { ACPI_ALLOCATE_BUFFER, NULL }; 909 union acpi_object *obj; 910 acpi_status status; 911 int code; 912 int orig_code; 913 914 status = wmi_get_event_data(value, &response); 915 if (status != AE_OK) { 916 pr_err("bad event status 0x%x\n", status); 917 return; 918 } 919 920 obj = (union acpi_object *)response.pointer; 921 922 if (obj && obj->type == ACPI_TYPE_INTEGER) { 923 code = obj->integer.value; 924 orig_code = code; 925 926 if (code >= NOTIFY_BRNUP_MIN && code <= NOTIFY_BRNUP_MAX) 927 code = NOTIFY_BRNUP_MIN; 928 else if (code >= NOTIFY_BRNDOWN_MIN && 929 code <= NOTIFY_BRNDOWN_MAX) 930 code = NOTIFY_BRNDOWN_MIN; 931 932 if (code == NOTIFY_BRNUP_MIN || code == NOTIFY_BRNDOWN_MIN) { 933 if (!acpi_video_backlight_support()) 934 eeepc_wmi_backlight_notify(eeepc, orig_code); 935 } 936 937 if (!sparse_keymap_report_event(eeepc->inputdev, 938 code, 1, true)) 939 pr_info("Unknown key %x pressed\n", code); 940 } 941 942 kfree(obj); 943 } 944 945 /* 946 * Sys helpers 947 */ 948 static int parse_arg(const char *buf, unsigned long count, int *val) 949 { 950 if (!count) 951 return 0; 952 if (sscanf(buf, "%i", val) != 1) 953 return -EINVAL; 954 return count; 955 } 956 957 static ssize_t store_sys_wmi(int devid, const char *buf, size_t count) 958 { 959 acpi_status status; 960 u32 retval; 961 int rv, value; 962 963 value = eeepc_wmi_get_devstate_simple(devid); 964 if (value == -ENODEV) /* Check device presence */ 965 return value; 966 967 rv = parse_arg(buf, count, &value); 968 status = eeepc_wmi_set_devstate(devid, value, &retval); 969 970 if (ACPI_FAILURE(status)) 971 return -EIO; 972 return rv; 973 } 974 975 static ssize_t show_sys_wmi(int devid, char *buf) 976 { 977 int value = eeepc_wmi_get_devstate_simple(devid); 978 979 if (value < 0) 980 return value; 981 982 return sprintf(buf, "%d\n", value); 983 } 984 985 #define EEEPC_WMI_CREATE_DEVICE_ATTR(_name, _mode, _cm) \ 986 static ssize_t show_##_name(struct device *dev, \ 987 struct device_attribute *attr, \ 988 char *buf) \ 989 { \ 990 return show_sys_wmi(_cm, buf); \ 991 } \ 992 static ssize_t store_##_name(struct device *dev, \ 993 struct device_attribute *attr, \ 994 const char *buf, size_t count) \ 995 { \ 996 return store_sys_wmi(_cm, buf, count); \ 997 } \ 998 static struct device_attribute dev_attr_##_name = { \ 999 .attr = { \ 1000 .name = __stringify(_name), \ 1001 .mode = _mode }, \ 1002 .show = show_##_name, \ 1003 .store = store_##_name, \ 1004 } 1005 1006 EEEPC_WMI_CREATE_DEVICE_ATTR(camera, 0644, EEEPC_WMI_DEVID_CAMERA); 1007 EEEPC_WMI_CREATE_DEVICE_ATTR(cardr, 0644, EEEPC_WMI_DEVID_CARDREADER); 1008 1009 static ssize_t store_cpufv(struct device *dev, struct device_attribute *attr, 1010 const char *buf, size_t count) 1011 { 1012 int value; 1013 struct acpi_buffer input = { (acpi_size)sizeof(value), &value }; 1014 acpi_status status; 1015 1016 if (!count || sscanf(buf, "%i", &value) != 1) 1017 return -EINVAL; 1018 if (value < 0 || value > 2) 1019 return -EINVAL; 1020 1021 status = wmi_evaluate_method(EEEPC_WMI_MGMT_GUID, 1022 1, EEEPC_WMI_METHODID_CFVS, &input, NULL); 1023 1024 if (ACPI_FAILURE(status)) 1025 return -EIO; 1026 else 1027 return count; 1028 } 1029 1030 static DEVICE_ATTR(cpufv, S_IRUGO | S_IWUSR, NULL, store_cpufv); 1031 1032 static struct attribute *platform_attributes[] = { 1033 &dev_attr_cpufv.attr, 1034 &dev_attr_camera.attr, 1035 &dev_attr_cardr.attr, 1036 NULL 1037 }; 1038 1039 static mode_t eeepc_sysfs_is_visible(struct kobject *kobj, 1040 struct attribute *attr, 1041 int idx) 1042 { 1043 bool supported = true; 1044 int devid = -1; 1045 1046 if (attr == &dev_attr_camera.attr) 1047 devid = EEEPC_WMI_DEVID_CAMERA; 1048 else if (attr == &dev_attr_cardr.attr) 1049 devid = EEEPC_WMI_DEVID_CARDREADER; 1050 1051 if (devid != -1) 1052 supported = eeepc_wmi_get_devstate_simple(devid) != -ENODEV; 1053 1054 return supported ? attr->mode : 0; 1055 } 1056 1057 static struct attribute_group platform_attribute_group = { 1058 .is_visible = eeepc_sysfs_is_visible, 1059 .attrs = platform_attributes 1060 }; 1061 1062 static void eeepc_wmi_sysfs_exit(struct platform_device *device) 1063 { 1064 sysfs_remove_group(&device->dev.kobj, &platform_attribute_group); 1065 } 1066 1067 static int eeepc_wmi_sysfs_init(struct platform_device *device) 1068 { 1069 return sysfs_create_group(&device->dev.kobj, &platform_attribute_group); 1070 } 1071 1072 /* 1073 * Platform device 1074 */ 1075 static int __init eeepc_wmi_platform_init(struct eeepc_wmi *eeepc) 1076 { 1077 return eeepc_wmi_sysfs_init(eeepc->platform_device); 1078 } 1079 1080 static void eeepc_wmi_platform_exit(struct eeepc_wmi *eeepc) 1081 { 1082 eeepc_wmi_sysfs_exit(eeepc->platform_device); 1083 } 1084 1085 /* 1086 * debugfs 1087 */ 1088 struct eeepc_wmi_debugfs_node { 1089 struct eeepc_wmi *eeepc; 1090 char *name; 1091 int (*show)(struct seq_file *m, void *data); 1092 }; 1093 1094 static int show_dsts(struct seq_file *m, void *data) 1095 { 1096 struct eeepc_wmi *eeepc = m->private; 1097 acpi_status status; 1098 u32 retval = -1; 1099 1100 status = eeepc_wmi_get_devstate(eeepc->debug.dev_id, &retval); 1101 1102 if (ACPI_FAILURE(status)) 1103 return -EIO; 1104 1105 seq_printf(m, "DSTS(%x) = %x\n", eeepc->debug.dev_id, retval); 1106 1107 return 0; 1108 } 1109 1110 static int show_devs(struct seq_file *m, void *data) 1111 { 1112 struct eeepc_wmi *eeepc = m->private; 1113 acpi_status status; 1114 u32 retval = -1; 1115 1116 status = eeepc_wmi_set_devstate(eeepc->debug.dev_id, 1117 eeepc->debug.ctrl_param, &retval); 1118 if (ACPI_FAILURE(status)) 1119 return -EIO; 1120 1121 seq_printf(m, "DEVS(%x, %x) = %x\n", eeepc->debug.dev_id, 1122 eeepc->debug.ctrl_param, retval); 1123 1124 return 0; 1125 } 1126 1127 static struct eeepc_wmi_debugfs_node eeepc_wmi_debug_files[] = { 1128 { NULL, "devs", show_devs }, 1129 { NULL, "dsts", show_dsts }, 1130 }; 1131 1132 static int eeepc_wmi_debugfs_open(struct inode *inode, struct file *file) 1133 { 1134 struct eeepc_wmi_debugfs_node *node = inode->i_private; 1135 1136 return single_open(file, node->show, node->eeepc); 1137 } 1138 1139 static const struct file_operations eeepc_wmi_debugfs_io_ops = { 1140 .owner = THIS_MODULE, 1141 .open = eeepc_wmi_debugfs_open, 1142 .read = seq_read, 1143 .llseek = seq_lseek, 1144 .release = single_release, 1145 }; 1146 1147 static void eeepc_wmi_debugfs_exit(struct eeepc_wmi *eeepc) 1148 { 1149 debugfs_remove_recursive(eeepc->debug.root); 1150 } 1151 1152 static int eeepc_wmi_debugfs_init(struct eeepc_wmi *eeepc) 1153 { 1154 struct dentry *dent; 1155 int i; 1156 1157 eeepc->debug.root = debugfs_create_dir(EEEPC_WMI_FILE, NULL); 1158 if (!eeepc->debug.root) { 1159 pr_err("failed to create debugfs directory"); 1160 goto error_debugfs; 1161 } 1162 1163 dent = debugfs_create_x32("dev_id", S_IRUGO|S_IWUSR, 1164 eeepc->debug.root, &eeepc->debug.dev_id); 1165 if (!dent) 1166 goto error_debugfs; 1167 1168 dent = debugfs_create_x32("ctrl_param", S_IRUGO|S_IWUSR, 1169 eeepc->debug.root, &eeepc->debug.ctrl_param); 1170 if (!dent) 1171 goto error_debugfs; 1172 1173 for (i = 0; i < ARRAY_SIZE(eeepc_wmi_debug_files); i++) { 1174 struct eeepc_wmi_debugfs_node *node = &eeepc_wmi_debug_files[i]; 1175 1176 node->eeepc = eeepc; 1177 dent = debugfs_create_file(node->name, S_IFREG | S_IRUGO, 1178 eeepc->debug.root, node, 1179 &eeepc_wmi_debugfs_io_ops); 1180 if (!dent) { 1181 pr_err("failed to create debug file: %s\n", node->name); 1182 goto error_debugfs; 1183 } 1184 } 1185 1186 return 0; 1187 1188 error_debugfs: 1189 eeepc_wmi_debugfs_exit(eeepc); 1190 return -ENOMEM; 1191 } 1192 1193 /* 1194 * WMI Driver 1195 */ 1196 static void eeepc_dmi_check(struct eeepc_wmi *eeepc) 1197 { 1198 const char *model; 1199 1200 model = dmi_get_system_info(DMI_PRODUCT_NAME); 1201 if (!model) 1202 return; 1203 1204 /* 1205 * Whitelist for wlan hotplug 1206 * 1207 * Eeepc 1000H needs the current hotplug code to handle 1208 * Fn+F2 correctly. We may add other Eeepc here later, but 1209 * it seems that most of the laptops supported by eeepc-wmi 1210 * don't need to be on this list 1211 */ 1212 if (strcmp(model, "1000H") == 0) { 1213 eeepc->hotplug_wireless = true; 1214 pr_info("wlan hotplug enabled\n"); 1215 } 1216 } 1217 1218 static int __init eeepc_wmi_add(struct platform_device *pdev) 1219 { 1220 struct eeepc_wmi *eeepc; 1221 acpi_status status; 1222 int err; 1223 1224 eeepc = kzalloc(sizeof(struct eeepc_wmi), GFP_KERNEL); 1225 if (!eeepc) 1226 return -ENOMEM; 1227 1228 eeepc->platform_device = pdev; 1229 platform_set_drvdata(eeepc->platform_device, eeepc); 1230 1231 eeepc->hotplug_wireless = hotplug_wireless; 1232 eeepc_dmi_check(eeepc); 1233 1234 err = eeepc_wmi_platform_init(eeepc); 1235 if (err) 1236 goto fail_platform; 1237 1238 err = eeepc_wmi_input_init(eeepc); 1239 if (err) 1240 goto fail_input; 1241 1242 err = eeepc_wmi_led_init(eeepc); 1243 if (err) 1244 goto fail_leds; 1245 1246 err = eeepc_wmi_rfkill_init(eeepc); 1247 if (err) 1248 goto fail_rfkill; 1249 1250 if (!acpi_video_backlight_support()) { 1251 err = eeepc_wmi_backlight_init(eeepc); 1252 if (err && err != -ENODEV) 1253 goto fail_backlight; 1254 } else 1255 pr_info("Backlight controlled by ACPI video driver\n"); 1256 1257 status = wmi_install_notify_handler(EEEPC_WMI_EVENT_GUID, 1258 eeepc_wmi_notify, eeepc); 1259 if (ACPI_FAILURE(status)) { 1260 pr_err("Unable to register notify handler - %d\n", 1261 status); 1262 err = -ENODEV; 1263 goto fail_wmi_handler; 1264 } 1265 1266 err = eeepc_wmi_debugfs_init(eeepc); 1267 if (err) 1268 goto fail_debugfs; 1269 1270 return 0; 1271 1272 fail_debugfs: 1273 wmi_remove_notify_handler(EEEPC_WMI_EVENT_GUID); 1274 fail_wmi_handler: 1275 eeepc_wmi_backlight_exit(eeepc); 1276 fail_backlight: 1277 eeepc_wmi_rfkill_exit(eeepc); 1278 fail_rfkill: 1279 eeepc_wmi_led_exit(eeepc); 1280 fail_leds: 1281 eeepc_wmi_input_exit(eeepc); 1282 fail_input: 1283 eeepc_wmi_platform_exit(eeepc); 1284 fail_platform: 1285 kfree(eeepc); 1286 return err; 1287 } 1288 1289 static int __exit eeepc_wmi_remove(struct platform_device *device) 1290 { 1291 struct eeepc_wmi *eeepc; 1292 1293 eeepc = platform_get_drvdata(device); 1294 wmi_remove_notify_handler(EEEPC_WMI_EVENT_GUID); 1295 eeepc_wmi_backlight_exit(eeepc); 1296 eeepc_wmi_input_exit(eeepc); 1297 eeepc_wmi_led_exit(eeepc); 1298 eeepc_wmi_rfkill_exit(eeepc); 1299 eeepc_wmi_debugfs_exit(eeepc); 1300 eeepc_wmi_platform_exit(eeepc); 1301 1302 kfree(eeepc); 1303 return 0; 1304 } 1305 1306 /* 1307 * Platform driver - hibernate/resume callbacks 1308 */ 1309 static int eeepc_hotk_thaw(struct device *device) 1310 { 1311 struct eeepc_wmi *eeepc = dev_get_drvdata(device); 1312 1313 if (eeepc->wlan_rfkill) { 1314 bool wlan; 1315 1316 /* 1317 * Work around bios bug - acpi _PTS turns off the wireless led 1318 * during suspend. Normally it restores it on resume, but 1319 * we should kick it ourselves in case hibernation is aborted. 1320 */ 1321 wlan = eeepc_wmi_get_devstate_simple(EEEPC_WMI_DEVID_WLAN); 1322 eeepc_wmi_set_devstate(EEEPC_WMI_DEVID_WLAN, wlan, NULL); 1323 } 1324 1325 return 0; 1326 } 1327 1328 static int eeepc_hotk_restore(struct device *device) 1329 { 1330 struct eeepc_wmi *eeepc = dev_get_drvdata(device); 1331 int bl; 1332 1333 /* Refresh both wlan rfkill state and pci hotplug */ 1334 if (eeepc->wlan_rfkill) 1335 eeepc_rfkill_hotplug(eeepc); 1336 1337 if (eeepc->bluetooth_rfkill) { 1338 bl = !eeepc_wmi_get_devstate_simple(EEEPC_WMI_DEVID_BLUETOOTH); 1339 rfkill_set_sw_state(eeepc->bluetooth_rfkill, bl); 1340 } 1341 if (eeepc->wimax_rfkill) { 1342 bl = !eeepc_wmi_get_devstate_simple(EEEPC_WMI_DEVID_WIMAX); 1343 rfkill_set_sw_state(eeepc->wimax_rfkill, bl); 1344 } 1345 if (eeepc->wwan3g_rfkill) { 1346 bl = !eeepc_wmi_get_devstate_simple(EEEPC_WMI_DEVID_WWAN3G); 1347 rfkill_set_sw_state(eeepc->wwan3g_rfkill, bl); 1348 } 1349 1350 return 0; 1351 } 1352 1353 static const struct dev_pm_ops eeepc_pm_ops = { 1354 .thaw = eeepc_hotk_thaw, 1355 .restore = eeepc_hotk_restore, 1356 }; 1357 1358 static struct platform_driver platform_driver = { 1359 .remove = __exit_p(eeepc_wmi_remove), 1360 .driver = { 1361 .name = EEEPC_WMI_FILE, 1362 .owner = THIS_MODULE, 1363 .pm = &eeepc_pm_ops, 1364 }, 1365 }; 1366 1367 static acpi_status __init eeepc_wmi_parse_device(acpi_handle handle, u32 level, 1368 void *context, void **retval) 1369 { 1370 pr_warning("Found legacy ATKD device (%s)", EEEPC_ACPI_HID); 1371 *(bool *)context = true; 1372 return AE_CTRL_TERMINATE; 1373 } 1374 1375 static int __init eeepc_wmi_check_atkd(void) 1376 { 1377 acpi_status status; 1378 bool found = false; 1379 1380 status = acpi_get_devices(EEEPC_ACPI_HID, eeepc_wmi_parse_device, 1381 &found, NULL); 1382 1383 if (ACPI_FAILURE(status) || !found) 1384 return 0; 1385 return -1; 1386 } 1387 1388 static int __init eeepc_wmi_probe(struct platform_device *pdev) 1389 { 1390 if (!wmi_has_guid(EEEPC_WMI_EVENT_GUID) || 1391 !wmi_has_guid(EEEPC_WMI_MGMT_GUID)) { 1392 pr_warning("No known WMI GUID found\n"); 1393 return -ENODEV; 1394 } 1395 1396 if (eeepc_wmi_check_atkd()) { 1397 pr_warning("WMI device present, but legacy ATKD device is also " 1398 "present and enabled."); 1399 pr_warning("You probably booted with acpi_osi=\"Linux\" or " 1400 "acpi_osi=\"!Windows 2009\""); 1401 pr_warning("Can't load eeepc-wmi, use default acpi_osi " 1402 "(preferred) or eeepc-laptop"); 1403 return -ENODEV; 1404 } 1405 1406 return eeepc_wmi_add(pdev); 1407 } 1408 1409 static struct platform_device *platform_device; 1410 1411 static int __init eeepc_wmi_init(void) 1412 { 1413 platform_device = platform_create_bundle(&platform_driver, 1414 eeepc_wmi_probe, 1415 NULL, 0, NULL, 0); 1416 if (IS_ERR(platform_device)) 1417 return PTR_ERR(platform_device); 1418 return 0; 1419 } 1420 1421 static void __exit eeepc_wmi_exit(void) 1422 { 1423 platform_device_unregister(platform_device); 1424 platform_driver_unregister(&platform_driver); 1425 } 1426 1427 module_init(eeepc_wmi_init); 1428 module_exit(eeepc_wmi_exit); 1429