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 /* WMI Methods */ 69 #define EEEPC_WMI_METHODID_DSTS 0x53544344 70 #define EEEPC_WMI_METHODID_DEVS 0x53564544 71 #define EEEPC_WMI_METHODID_CFVS 0x53564643 72 73 /* Wireless */ 74 #define EEEPC_WMI_DEVID_WLAN 0x00010011 75 #define EEEPC_WMI_DEVID_BLUETOOTH 0x00010013 76 #define EEEPC_WMI_DEVID_WIMAX 0x00010017 77 #define EEEPC_WMI_DEVID_WWAN3G 0x00010019 78 79 /* Backlight and Brightness */ 80 #define EEEPC_WMI_DEVID_BACKLIGHT 0x00050011 81 #define EEEPC_WMI_DEVID_BRIGHTNESS 0x00050012 82 83 /* Misc */ 84 #define EEEPC_WMI_DEVID_CAMERA 0x00060013 85 86 /* Storage */ 87 #define EEEPC_WMI_DEVID_CARDREADER 0x00080013 88 89 /* Input */ 90 #define EEEPC_WMI_DEVID_TOUCHPAD 0x00100011 91 #define EEEPC_WMI_DEVID_TOUCHPAD_LED 0x00100012 92 93 /* DSTS masks */ 94 #define EEEPC_WMI_DSTS_STATUS_BIT 0x00000001 95 #define EEEPC_WMI_DSTS_PRESENCE_BIT 0x00010000 96 #define EEEPC_WMI_DSTS_BRIGHTNESS_MASK 0x000000FF 97 #define EEEPC_WMI_DSTS_MAX_BRIGTH_MASK 0x0000FF00 98 99 static bool hotplug_wireless; 100 101 module_param(hotplug_wireless, bool, 0444); 102 MODULE_PARM_DESC(hotplug_wireless, 103 "Enable hotplug for wireless device. " 104 "If your laptop needs that, please report to " 105 "acpi4asus-user@lists.sourceforge.net."); 106 107 static const struct key_entry eeepc_wmi_keymap[] = { 108 /* Sleep already handled via generic ACPI code */ 109 { KE_IGNORE, NOTIFY_BRNDOWN_MIN, { KEY_BRIGHTNESSDOWN } }, 110 { KE_IGNORE, NOTIFY_BRNUP_MIN, { KEY_BRIGHTNESSUP } }, 111 { KE_KEY, 0x30, { KEY_VOLUMEUP } }, 112 { KE_KEY, 0x31, { KEY_VOLUMEDOWN } }, 113 { KE_KEY, 0x32, { KEY_MUTE } }, 114 { KE_KEY, 0x5c, { KEY_F15 } }, /* Power Gear key */ 115 { KE_KEY, 0x5d, { KEY_WLAN } }, 116 { KE_KEY, 0x6b, { KEY_F13 } }, /* Disable Touchpad */ 117 { KE_KEY, 0x82, { KEY_CAMERA } }, 118 { KE_KEY, 0x83, { KEY_CAMERA_ZOOMIN } }, 119 { KE_KEY, 0x88, { KEY_WLAN } }, 120 { KE_KEY, 0xcc, { KEY_SWITCHVIDEOMODE } }, 121 { KE_KEY, 0xe0, { KEY_PROG1 } }, /* Task Manager */ 122 { KE_KEY, 0xe1, { KEY_F14 } }, /* Change Resolution */ 123 { KE_KEY, 0xe9, { KEY_BRIGHTNESS_ZERO } }, 124 { KE_KEY, 0xeb, { KEY_CAMERA_ZOOMOUT } }, 125 { KE_KEY, 0xec, { KEY_CAMERA_UP } }, 126 { KE_KEY, 0xed, { KEY_CAMERA_DOWN } }, 127 { KE_KEY, 0xee, { KEY_CAMERA_LEFT } }, 128 { KE_KEY, 0xef, { KEY_CAMERA_RIGHT } }, 129 { KE_END, 0}, 130 }; 131 132 struct bios_args { 133 u32 dev_id; 134 u32 ctrl_param; 135 }; 136 137 /* 138 * eeepc-wmi/ - debugfs root directory 139 * dev_id - current dev_id 140 * ctrl_param - current ctrl_param 141 * devs - call DEVS(dev_id, ctrl_param) and print result 142 * dsts - call DSTS(dev_id) and print result 143 */ 144 struct eeepc_wmi_debug { 145 struct dentry *root; 146 u32 dev_id; 147 u32 ctrl_param; 148 }; 149 150 struct eeepc_wmi { 151 bool hotplug_wireless; 152 153 struct input_dev *inputdev; 154 struct backlight_device *backlight_device; 155 struct platform_device *platform_device; 156 157 struct led_classdev tpd_led; 158 int tpd_led_wk; 159 struct workqueue_struct *led_workqueue; 160 struct work_struct tpd_led_work; 161 162 struct rfkill *wlan_rfkill; 163 struct rfkill *bluetooth_rfkill; 164 struct rfkill *wimax_rfkill; 165 struct rfkill *wwan3g_rfkill; 166 167 struct hotplug_slot *hotplug_slot; 168 struct mutex hotplug_lock; 169 struct mutex wmi_lock; 170 struct workqueue_struct *hotplug_workqueue; 171 struct work_struct hotplug_work; 172 173 struct eeepc_wmi_debug debug; 174 }; 175 176 static int eeepc_wmi_input_init(struct eeepc_wmi *eeepc) 177 { 178 int err; 179 180 eeepc->inputdev = input_allocate_device(); 181 if (!eeepc->inputdev) 182 return -ENOMEM; 183 184 eeepc->inputdev->name = "Eee PC WMI hotkeys"; 185 eeepc->inputdev->phys = EEEPC_WMI_FILE "/input0"; 186 eeepc->inputdev->id.bustype = BUS_HOST; 187 eeepc->inputdev->dev.parent = &eeepc->platform_device->dev; 188 189 err = sparse_keymap_setup(eeepc->inputdev, eeepc_wmi_keymap, NULL); 190 if (err) 191 goto err_free_dev; 192 193 err = input_register_device(eeepc->inputdev); 194 if (err) 195 goto err_free_keymap; 196 197 return 0; 198 199 err_free_keymap: 200 sparse_keymap_free(eeepc->inputdev); 201 err_free_dev: 202 input_free_device(eeepc->inputdev); 203 return err; 204 } 205 206 static void eeepc_wmi_input_exit(struct eeepc_wmi *eeepc) 207 { 208 if (eeepc->inputdev) { 209 sparse_keymap_free(eeepc->inputdev); 210 input_unregister_device(eeepc->inputdev); 211 } 212 213 eeepc->inputdev = NULL; 214 } 215 216 static acpi_status eeepc_wmi_get_devstate(u32 dev_id, u32 *retval) 217 { 218 struct acpi_buffer input = { (acpi_size)sizeof(u32), &dev_id }; 219 struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL }; 220 union acpi_object *obj; 221 acpi_status status; 222 u32 tmp; 223 224 status = wmi_evaluate_method(EEEPC_WMI_MGMT_GUID, 225 1, EEEPC_WMI_METHODID_DSTS, 226 &input, &output); 227 228 if (ACPI_FAILURE(status)) 229 return status; 230 231 obj = (union acpi_object *)output.pointer; 232 if (obj && obj->type == ACPI_TYPE_INTEGER) 233 tmp = (u32)obj->integer.value; 234 else 235 tmp = 0; 236 237 if (retval) 238 *retval = tmp; 239 240 kfree(obj); 241 242 return status; 243 244 } 245 246 static acpi_status eeepc_wmi_set_devstate(u32 dev_id, u32 ctrl_param, 247 u32 *retval) 248 { 249 struct bios_args args = { 250 .dev_id = dev_id, 251 .ctrl_param = ctrl_param, 252 }; 253 struct acpi_buffer input = { (acpi_size)sizeof(args), &args }; 254 acpi_status status; 255 256 if (!retval) { 257 status = wmi_evaluate_method(EEEPC_WMI_MGMT_GUID, 1, 258 EEEPC_WMI_METHODID_DEVS, 259 &input, NULL); 260 } else { 261 struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL }; 262 union acpi_object *obj; 263 u32 tmp; 264 265 status = wmi_evaluate_method(EEEPC_WMI_MGMT_GUID, 1, 266 EEEPC_WMI_METHODID_DEVS, 267 &input, &output); 268 269 if (ACPI_FAILURE(status)) 270 return status; 271 272 obj = (union acpi_object *)output.pointer; 273 if (obj && obj->type == ACPI_TYPE_INTEGER) 274 tmp = (u32)obj->integer.value; 275 else 276 tmp = 0; 277 278 *retval = tmp; 279 280 kfree(obj); 281 } 282 283 return status; 284 } 285 286 /* Helper for special devices with magic return codes */ 287 static int eeepc_wmi_get_devstate_bits(u32 dev_id, u32 mask) 288 { 289 u32 retval = 0; 290 acpi_status status; 291 292 status = eeepc_wmi_get_devstate(dev_id, &retval); 293 294 if (ACPI_FAILURE(status)) 295 return -EINVAL; 296 297 if (!(retval & EEEPC_WMI_DSTS_PRESENCE_BIT)) 298 return -ENODEV; 299 300 return retval & mask; 301 } 302 303 static int eeepc_wmi_get_devstate_simple(u32 dev_id) 304 { 305 return eeepc_wmi_get_devstate_bits(dev_id, EEEPC_WMI_DSTS_STATUS_BIT); 306 } 307 308 /* 309 * LEDs 310 */ 311 /* 312 * These functions actually update the LED's, and are called from a 313 * workqueue. By doing this as separate work rather than when the LED 314 * subsystem asks, we avoid messing with the Eeepc ACPI stuff during a 315 * potentially bad time, such as a timer interrupt. 316 */ 317 static void tpd_led_update(struct work_struct *work) 318 { 319 int ctrl_param; 320 struct eeepc_wmi *eeepc; 321 322 eeepc = container_of(work, struct eeepc_wmi, tpd_led_work); 323 324 ctrl_param = eeepc->tpd_led_wk; 325 eeepc_wmi_set_devstate(EEEPC_WMI_DEVID_TOUCHPAD_LED, ctrl_param, NULL); 326 } 327 328 static void tpd_led_set(struct led_classdev *led_cdev, 329 enum led_brightness value) 330 { 331 struct eeepc_wmi *eeepc; 332 333 eeepc = container_of(led_cdev, struct eeepc_wmi, tpd_led); 334 335 eeepc->tpd_led_wk = !!value; 336 queue_work(eeepc->led_workqueue, &eeepc->tpd_led_work); 337 } 338 339 static int read_tpd_led_state(struct eeepc_wmi *eeepc) 340 { 341 return eeepc_wmi_get_devstate_simple(EEEPC_WMI_DEVID_TOUCHPAD_LED); 342 } 343 344 static enum led_brightness tpd_led_get(struct led_classdev *led_cdev) 345 { 346 struct eeepc_wmi *eeepc; 347 348 eeepc = container_of(led_cdev, struct eeepc_wmi, tpd_led); 349 350 return read_tpd_led_state(eeepc); 351 } 352 353 static int eeepc_wmi_led_init(struct eeepc_wmi *eeepc) 354 { 355 int rv; 356 357 if (read_tpd_led_state(eeepc) < 0) 358 return 0; 359 360 eeepc->led_workqueue = create_singlethread_workqueue("led_workqueue"); 361 if (!eeepc->led_workqueue) 362 return -ENOMEM; 363 INIT_WORK(&eeepc->tpd_led_work, tpd_led_update); 364 365 eeepc->tpd_led.name = "eeepc::touchpad"; 366 eeepc->tpd_led.brightness_set = tpd_led_set; 367 eeepc->tpd_led.brightness_get = tpd_led_get; 368 eeepc->tpd_led.max_brightness = 1; 369 370 rv = led_classdev_register(&eeepc->platform_device->dev, 371 &eeepc->tpd_led); 372 if (rv) { 373 destroy_workqueue(eeepc->led_workqueue); 374 return rv; 375 } 376 377 return 0; 378 } 379 380 static void eeepc_wmi_led_exit(struct eeepc_wmi *eeepc) 381 { 382 if (eeepc->tpd_led.dev) 383 led_classdev_unregister(&eeepc->tpd_led); 384 if (eeepc->led_workqueue) 385 destroy_workqueue(eeepc->led_workqueue); 386 } 387 388 /* 389 * PCI hotplug (for wlan rfkill) 390 */ 391 static bool eeepc_wlan_rfkill_blocked(struct eeepc_wmi *eeepc) 392 { 393 int result = eeepc_wmi_get_devstate_simple(EEEPC_WMI_DEVID_WLAN); 394 395 if (result < 0) 396 return false; 397 return !result; 398 } 399 400 static void eeepc_rfkill_hotplug(struct eeepc_wmi *eeepc) 401 { 402 struct pci_dev *dev; 403 struct pci_bus *bus; 404 bool blocked; 405 bool absent; 406 u32 l; 407 408 mutex_lock(&eeepc->wmi_lock); 409 blocked = eeepc_wlan_rfkill_blocked(eeepc); 410 mutex_unlock(&eeepc->wmi_lock); 411 412 mutex_lock(&eeepc->hotplug_lock); 413 414 if (eeepc->wlan_rfkill) 415 rfkill_set_sw_state(eeepc->wlan_rfkill, blocked); 416 417 if (eeepc->hotplug_slot) { 418 bus = pci_find_bus(0, 1); 419 if (!bus) { 420 pr_warning("Unable to find PCI bus 1?\n"); 421 goto out_unlock; 422 } 423 424 if (pci_bus_read_config_dword(bus, 0, PCI_VENDOR_ID, &l)) { 425 pr_err("Unable to read PCI config space?\n"); 426 goto out_unlock; 427 } 428 absent = (l == 0xffffffff); 429 430 if (blocked != absent) { 431 pr_warning("BIOS says wireless lan is %s, " 432 "but the pci device is %s\n", 433 blocked ? "blocked" : "unblocked", 434 absent ? "absent" : "present"); 435 pr_warning("skipped wireless hotplug as probably " 436 "inappropriate for this model\n"); 437 goto out_unlock; 438 } 439 440 if (!blocked) { 441 dev = pci_get_slot(bus, 0); 442 if (dev) { 443 /* Device already present */ 444 pci_dev_put(dev); 445 goto out_unlock; 446 } 447 dev = pci_scan_single_device(bus, 0); 448 if (dev) { 449 pci_bus_assign_resources(bus); 450 if (pci_bus_add_device(dev)) 451 pr_err("Unable to hotplug wifi\n"); 452 } 453 } else { 454 dev = pci_get_slot(bus, 0); 455 if (dev) { 456 pci_remove_bus_device(dev); 457 pci_dev_put(dev); 458 } 459 } 460 } 461 462 out_unlock: 463 mutex_unlock(&eeepc->hotplug_lock); 464 } 465 466 static void eeepc_rfkill_notify(acpi_handle handle, u32 event, void *data) 467 { 468 struct eeepc_wmi *eeepc = data; 469 470 if (event != ACPI_NOTIFY_BUS_CHECK) 471 return; 472 473 /* 474 * We can't call directly eeepc_rfkill_hotplug because most 475 * of the time WMBC is still being executed and not reetrant. 476 * There is currently no way to tell ACPICA that we want this 477 * method to be serialized, we schedule a eeepc_rfkill_hotplug 478 * call later, in a safer context. 479 */ 480 queue_work(eeepc->hotplug_workqueue, &eeepc->hotplug_work); 481 } 482 483 static int eeepc_register_rfkill_notifier(struct eeepc_wmi *eeepc, 484 char *node) 485 { 486 acpi_status status; 487 acpi_handle handle; 488 489 status = acpi_get_handle(NULL, node, &handle); 490 491 if (ACPI_SUCCESS(status)) { 492 status = acpi_install_notify_handler(handle, 493 ACPI_SYSTEM_NOTIFY, 494 eeepc_rfkill_notify, 495 eeepc); 496 if (ACPI_FAILURE(status)) 497 pr_warning("Failed to register notify on %s\n", node); 498 } else 499 return -ENODEV; 500 501 return 0; 502 } 503 504 static void eeepc_unregister_rfkill_notifier(struct eeepc_wmi *eeepc, 505 char *node) 506 { 507 acpi_status status = AE_OK; 508 acpi_handle handle; 509 510 status = acpi_get_handle(NULL, node, &handle); 511 512 if (ACPI_SUCCESS(status)) { 513 status = acpi_remove_notify_handler(handle, 514 ACPI_SYSTEM_NOTIFY, 515 eeepc_rfkill_notify); 516 if (ACPI_FAILURE(status)) 517 pr_err("Error removing rfkill notify handler %s\n", 518 node); 519 } 520 } 521 522 static int eeepc_get_adapter_status(struct hotplug_slot *hotplug_slot, 523 u8 *value) 524 { 525 int result = eeepc_wmi_get_devstate_simple(EEEPC_WMI_DEVID_WLAN); 526 527 if (result < 0) 528 return result; 529 530 *value = !!result; 531 return 0; 532 } 533 534 static void eeepc_cleanup_pci_hotplug(struct hotplug_slot *hotplug_slot) 535 { 536 kfree(hotplug_slot->info); 537 kfree(hotplug_slot); 538 } 539 540 static struct hotplug_slot_ops eeepc_hotplug_slot_ops = { 541 .owner = THIS_MODULE, 542 .get_adapter_status = eeepc_get_adapter_status, 543 .get_power_status = eeepc_get_adapter_status, 544 }; 545 546 static void eeepc_hotplug_work(struct work_struct *work) 547 { 548 struct eeepc_wmi *eeepc; 549 550 eeepc = container_of(work, struct eeepc_wmi, hotplug_work); 551 eeepc_rfkill_hotplug(eeepc); 552 } 553 554 static int eeepc_setup_pci_hotplug(struct eeepc_wmi *eeepc) 555 { 556 int ret = -ENOMEM; 557 struct pci_bus *bus = pci_find_bus(0, 1); 558 559 if (!bus) { 560 pr_err("Unable to find wifi PCI bus\n"); 561 return -ENODEV; 562 } 563 564 eeepc->hotplug_workqueue = 565 create_singlethread_workqueue("hotplug_workqueue"); 566 if (!eeepc->hotplug_workqueue) 567 goto error_workqueue; 568 569 INIT_WORK(&eeepc->hotplug_work, eeepc_hotplug_work); 570 571 eeepc->hotplug_slot = kzalloc(sizeof(struct hotplug_slot), GFP_KERNEL); 572 if (!eeepc->hotplug_slot) 573 goto error_slot; 574 575 eeepc->hotplug_slot->info = kzalloc(sizeof(struct hotplug_slot_info), 576 GFP_KERNEL); 577 if (!eeepc->hotplug_slot->info) 578 goto error_info; 579 580 eeepc->hotplug_slot->private = eeepc; 581 eeepc->hotplug_slot->release = &eeepc_cleanup_pci_hotplug; 582 eeepc->hotplug_slot->ops = &eeepc_hotplug_slot_ops; 583 eeepc_get_adapter_status(eeepc->hotplug_slot, 584 &eeepc->hotplug_slot->info->adapter_status); 585 586 ret = pci_hp_register(eeepc->hotplug_slot, bus, 0, "eeepc-wifi"); 587 if (ret) { 588 pr_err("Unable to register hotplug slot - %d\n", ret); 589 goto error_register; 590 } 591 592 return 0; 593 594 error_register: 595 kfree(eeepc->hotplug_slot->info); 596 error_info: 597 kfree(eeepc->hotplug_slot); 598 eeepc->hotplug_slot = NULL; 599 error_slot: 600 destroy_workqueue(eeepc->hotplug_workqueue); 601 error_workqueue: 602 return ret; 603 } 604 605 /* 606 * Rfkill devices 607 */ 608 static int eeepc_rfkill_set(void *data, bool blocked) 609 { 610 int dev_id = (unsigned long)data; 611 u32 ctrl_param = !blocked; 612 acpi_status status; 613 614 status = eeepc_wmi_set_devstate(dev_id, ctrl_param, NULL); 615 616 if (ACPI_FAILURE(status)) 617 return -EIO; 618 619 return 0; 620 } 621 622 static void eeepc_rfkill_query(struct rfkill *rfkill, void *data) 623 { 624 int dev_id = (unsigned long)data; 625 int result; 626 627 result = eeepc_wmi_get_devstate_simple(dev_id); 628 629 if (result < 0) 630 return ; 631 632 rfkill_set_sw_state(rfkill, !result); 633 } 634 635 static int eeepc_rfkill_wlan_set(void *data, bool blocked) 636 { 637 struct eeepc_wmi *eeepc = data; 638 int ret; 639 640 /* 641 * This handler is enabled only if hotplug is enabled. 642 * In this case, the eeepc_wmi_set_devstate() will 643 * trigger a wmi notification and we need to wait 644 * this call to finish before being able to call 645 * any wmi method 646 */ 647 mutex_lock(&eeepc->wmi_lock); 648 ret = eeepc_rfkill_set((void *)(long)EEEPC_WMI_DEVID_WLAN, blocked); 649 mutex_unlock(&eeepc->wmi_lock); 650 return ret; 651 } 652 653 static void eeepc_rfkill_wlan_query(struct rfkill *rfkill, void *data) 654 { 655 eeepc_rfkill_query(rfkill, (void *)(long)EEEPC_WMI_DEVID_WLAN); 656 } 657 658 static const struct rfkill_ops eeepc_rfkill_wlan_ops = { 659 .set_block = eeepc_rfkill_wlan_set, 660 .query = eeepc_rfkill_wlan_query, 661 }; 662 663 static const struct rfkill_ops eeepc_rfkill_ops = { 664 .set_block = eeepc_rfkill_set, 665 .query = eeepc_rfkill_query, 666 }; 667 668 static int eeepc_new_rfkill(struct eeepc_wmi *eeepc, 669 struct rfkill **rfkill, 670 const char *name, 671 enum rfkill_type type, int dev_id) 672 { 673 int result = eeepc_wmi_get_devstate_simple(dev_id); 674 675 if (result < 0) 676 return result; 677 678 if (dev_id == EEEPC_WMI_DEVID_WLAN && eeepc->hotplug_wireless) 679 *rfkill = rfkill_alloc(name, &eeepc->platform_device->dev, type, 680 &eeepc_rfkill_wlan_ops, eeepc); 681 else 682 *rfkill = rfkill_alloc(name, &eeepc->platform_device->dev, type, 683 &eeepc_rfkill_ops, (void *)(long)dev_id); 684 685 if (!*rfkill) 686 return -EINVAL; 687 688 rfkill_init_sw_state(*rfkill, !result); 689 result = rfkill_register(*rfkill); 690 if (result) { 691 rfkill_destroy(*rfkill); 692 *rfkill = NULL; 693 return result; 694 } 695 return 0; 696 } 697 698 static void eeepc_wmi_rfkill_exit(struct eeepc_wmi *eeepc) 699 { 700 eeepc_unregister_rfkill_notifier(eeepc, "\\_SB.PCI0.P0P5"); 701 eeepc_unregister_rfkill_notifier(eeepc, "\\_SB.PCI0.P0P6"); 702 eeepc_unregister_rfkill_notifier(eeepc, "\\_SB.PCI0.P0P7"); 703 if (eeepc->wlan_rfkill) { 704 rfkill_unregister(eeepc->wlan_rfkill); 705 rfkill_destroy(eeepc->wlan_rfkill); 706 eeepc->wlan_rfkill = NULL; 707 } 708 /* 709 * Refresh pci hotplug in case the rfkill state was changed after 710 * eeepc_unregister_rfkill_notifier() 711 */ 712 eeepc_rfkill_hotplug(eeepc); 713 if (eeepc->hotplug_slot) 714 pci_hp_deregister(eeepc->hotplug_slot); 715 if (eeepc->hotplug_workqueue) 716 destroy_workqueue(eeepc->hotplug_workqueue); 717 718 if (eeepc->bluetooth_rfkill) { 719 rfkill_unregister(eeepc->bluetooth_rfkill); 720 rfkill_destroy(eeepc->bluetooth_rfkill); 721 eeepc->bluetooth_rfkill = NULL; 722 } 723 if (eeepc->wimax_rfkill) { 724 rfkill_unregister(eeepc->wimax_rfkill); 725 rfkill_destroy(eeepc->wimax_rfkill); 726 eeepc->wimax_rfkill = NULL; 727 } 728 if (eeepc->wwan3g_rfkill) { 729 rfkill_unregister(eeepc->wwan3g_rfkill); 730 rfkill_destroy(eeepc->wwan3g_rfkill); 731 eeepc->wwan3g_rfkill = NULL; 732 } 733 } 734 735 static int eeepc_wmi_rfkill_init(struct eeepc_wmi *eeepc) 736 { 737 int result = 0; 738 739 mutex_init(&eeepc->hotplug_lock); 740 mutex_init(&eeepc->wmi_lock); 741 742 result = eeepc_new_rfkill(eeepc, &eeepc->wlan_rfkill, 743 "eeepc-wlan", RFKILL_TYPE_WLAN, 744 EEEPC_WMI_DEVID_WLAN); 745 746 if (result && result != -ENODEV) 747 goto exit; 748 749 result = eeepc_new_rfkill(eeepc, &eeepc->bluetooth_rfkill, 750 "eeepc-bluetooth", RFKILL_TYPE_BLUETOOTH, 751 EEEPC_WMI_DEVID_BLUETOOTH); 752 753 if (result && result != -ENODEV) 754 goto exit; 755 756 result = eeepc_new_rfkill(eeepc, &eeepc->wimax_rfkill, 757 "eeepc-wimax", RFKILL_TYPE_WIMAX, 758 EEEPC_WMI_DEVID_WIMAX); 759 760 if (result && result != -ENODEV) 761 goto exit; 762 763 result = eeepc_new_rfkill(eeepc, &eeepc->wwan3g_rfkill, 764 "eeepc-wwan3g", RFKILL_TYPE_WWAN, 765 EEEPC_WMI_DEVID_WWAN3G); 766 767 if (result && result != -ENODEV) 768 goto exit; 769 770 if (!eeepc->hotplug_wireless) 771 goto exit; 772 773 result = eeepc_setup_pci_hotplug(eeepc); 774 /* 775 * If we get -EBUSY then something else is handling the PCI hotplug - 776 * don't fail in this case 777 */ 778 if (result == -EBUSY) 779 result = 0; 780 781 eeepc_register_rfkill_notifier(eeepc, "\\_SB.PCI0.P0P5"); 782 eeepc_register_rfkill_notifier(eeepc, "\\_SB.PCI0.P0P6"); 783 eeepc_register_rfkill_notifier(eeepc, "\\_SB.PCI0.P0P7"); 784 /* 785 * Refresh pci hotplug in case the rfkill state was changed during 786 * setup. 787 */ 788 eeepc_rfkill_hotplug(eeepc); 789 790 exit: 791 if (result && result != -ENODEV) 792 eeepc_wmi_rfkill_exit(eeepc); 793 794 if (result == -ENODEV) 795 result = 0; 796 797 return result; 798 } 799 800 /* 801 * Backlight 802 */ 803 static int read_backlight_power(void) 804 { 805 int ret = eeepc_wmi_get_devstate_simple(EEEPC_WMI_DEVID_BACKLIGHT); 806 807 if (ret < 0) 808 return ret; 809 810 return ret ? FB_BLANK_UNBLANK : FB_BLANK_POWERDOWN; 811 } 812 813 static int read_brightness(struct backlight_device *bd) 814 { 815 u32 retval; 816 acpi_status status; 817 818 status = eeepc_wmi_get_devstate(EEEPC_WMI_DEVID_BRIGHTNESS, &retval); 819 820 if (ACPI_FAILURE(status)) 821 return -EIO; 822 else 823 return retval & EEEPC_WMI_DSTS_BRIGHTNESS_MASK; 824 } 825 826 static int update_bl_status(struct backlight_device *bd) 827 { 828 u32 ctrl_param; 829 acpi_status status; 830 int power; 831 832 ctrl_param = bd->props.brightness; 833 834 status = eeepc_wmi_set_devstate(EEEPC_WMI_DEVID_BRIGHTNESS, 835 ctrl_param, NULL); 836 837 if (ACPI_FAILURE(status)) 838 return -EIO; 839 840 power = read_backlight_power(); 841 if (power != -ENODEV && bd->props.power != power) { 842 ctrl_param = !!(bd->props.power == FB_BLANK_UNBLANK); 843 status = eeepc_wmi_set_devstate(EEEPC_WMI_DEVID_BACKLIGHT, 844 ctrl_param, NULL); 845 846 if (ACPI_FAILURE(status)) 847 return -EIO; 848 } 849 return 0; 850 } 851 852 static const struct backlight_ops eeepc_wmi_bl_ops = { 853 .get_brightness = read_brightness, 854 .update_status = update_bl_status, 855 }; 856 857 static int eeepc_wmi_backlight_notify(struct eeepc_wmi *eeepc, int code) 858 { 859 struct backlight_device *bd = eeepc->backlight_device; 860 int old = bd->props.brightness; 861 int new = old; 862 863 if (code >= NOTIFY_BRNUP_MIN && code <= NOTIFY_BRNUP_MAX) 864 new = code - NOTIFY_BRNUP_MIN + 1; 865 else if (code >= NOTIFY_BRNDOWN_MIN && code <= NOTIFY_BRNDOWN_MAX) 866 new = code - NOTIFY_BRNDOWN_MIN; 867 868 bd->props.brightness = new; 869 backlight_update_status(bd); 870 backlight_force_update(bd, BACKLIGHT_UPDATE_HOTKEY); 871 872 return old; 873 } 874 875 static int eeepc_wmi_backlight_init(struct eeepc_wmi *eeepc) 876 { 877 struct backlight_device *bd; 878 struct backlight_properties props; 879 int max; 880 int power; 881 882 max = eeepc_wmi_get_devstate_bits(EEEPC_WMI_DEVID_BRIGHTNESS, 883 EEEPC_WMI_DSTS_MAX_BRIGTH_MASK); 884 power = read_backlight_power(); 885 886 if (max < 0 && power < 0) { 887 /* Try to keep the original error */ 888 if (max == -ENODEV && power == -ENODEV) 889 return -ENODEV; 890 if (max != -ENODEV) 891 return max; 892 else 893 return power; 894 } 895 if (max == -ENODEV) 896 max = 0; 897 if (power == -ENODEV) 898 power = FB_BLANK_UNBLANK; 899 900 memset(&props, 0, sizeof(struct backlight_properties)); 901 props.max_brightness = max; 902 bd = backlight_device_register(EEEPC_WMI_FILE, 903 &eeepc->platform_device->dev, eeepc, 904 &eeepc_wmi_bl_ops, &props); 905 if (IS_ERR(bd)) { 906 pr_err("Could not register backlight device\n"); 907 return PTR_ERR(bd); 908 } 909 910 eeepc->backlight_device = bd; 911 912 bd->props.brightness = read_brightness(bd); 913 bd->props.power = power; 914 backlight_update_status(bd); 915 916 return 0; 917 } 918 919 static void eeepc_wmi_backlight_exit(struct eeepc_wmi *eeepc) 920 { 921 if (eeepc->backlight_device) 922 backlight_device_unregister(eeepc->backlight_device); 923 924 eeepc->backlight_device = NULL; 925 } 926 927 static void eeepc_wmi_notify(u32 value, void *context) 928 { 929 struct eeepc_wmi *eeepc = context; 930 struct acpi_buffer response = { ACPI_ALLOCATE_BUFFER, NULL }; 931 union acpi_object *obj; 932 acpi_status status; 933 int code; 934 int orig_code; 935 936 status = wmi_get_event_data(value, &response); 937 if (status != AE_OK) { 938 pr_err("bad event status 0x%x\n", status); 939 return; 940 } 941 942 obj = (union acpi_object *)response.pointer; 943 944 if (obj && obj->type == ACPI_TYPE_INTEGER) { 945 code = obj->integer.value; 946 orig_code = code; 947 948 if (code >= NOTIFY_BRNUP_MIN && code <= NOTIFY_BRNUP_MAX) 949 code = NOTIFY_BRNUP_MIN; 950 else if (code >= NOTIFY_BRNDOWN_MIN && 951 code <= NOTIFY_BRNDOWN_MAX) 952 code = NOTIFY_BRNDOWN_MIN; 953 954 if (code == NOTIFY_BRNUP_MIN || code == NOTIFY_BRNDOWN_MIN) { 955 if (!acpi_video_backlight_support()) 956 eeepc_wmi_backlight_notify(eeepc, orig_code); 957 } 958 959 if (!sparse_keymap_report_event(eeepc->inputdev, 960 code, 1, true)) 961 pr_info("Unknown key %x pressed\n", code); 962 } 963 964 kfree(obj); 965 } 966 967 /* 968 * Sys helpers 969 */ 970 static int parse_arg(const char *buf, unsigned long count, int *val) 971 { 972 if (!count) 973 return 0; 974 if (sscanf(buf, "%i", val) != 1) 975 return -EINVAL; 976 return count; 977 } 978 979 static ssize_t store_sys_wmi(int devid, const char *buf, size_t count) 980 { 981 acpi_status status; 982 u32 retval; 983 int rv, value; 984 985 value = eeepc_wmi_get_devstate_simple(devid); 986 if (value == -ENODEV) /* Check device presence */ 987 return value; 988 989 rv = parse_arg(buf, count, &value); 990 status = eeepc_wmi_set_devstate(devid, value, &retval); 991 992 if (ACPI_FAILURE(status)) 993 return -EIO; 994 return rv; 995 } 996 997 static ssize_t show_sys_wmi(int devid, char *buf) 998 { 999 int value = eeepc_wmi_get_devstate_simple(devid); 1000 1001 if (value < 0) 1002 return value; 1003 1004 return sprintf(buf, "%d\n", value); 1005 } 1006 1007 #define EEEPC_WMI_CREATE_DEVICE_ATTR(_name, _mode, _cm) \ 1008 static ssize_t show_##_name(struct device *dev, \ 1009 struct device_attribute *attr, \ 1010 char *buf) \ 1011 { \ 1012 return show_sys_wmi(_cm, buf); \ 1013 } \ 1014 static ssize_t store_##_name(struct device *dev, \ 1015 struct device_attribute *attr, \ 1016 const char *buf, size_t count) \ 1017 { \ 1018 return store_sys_wmi(_cm, buf, count); \ 1019 } \ 1020 static struct device_attribute dev_attr_##_name = { \ 1021 .attr = { \ 1022 .name = __stringify(_name), \ 1023 .mode = _mode }, \ 1024 .show = show_##_name, \ 1025 .store = store_##_name, \ 1026 } 1027 1028 EEEPC_WMI_CREATE_DEVICE_ATTR(touchpad, 0644, EEEPC_WMI_DEVID_TOUCHPAD); 1029 EEEPC_WMI_CREATE_DEVICE_ATTR(camera, 0644, EEEPC_WMI_DEVID_CAMERA); 1030 EEEPC_WMI_CREATE_DEVICE_ATTR(cardr, 0644, EEEPC_WMI_DEVID_CARDREADER); 1031 1032 static ssize_t store_cpufv(struct device *dev, struct device_attribute *attr, 1033 const char *buf, size_t count) 1034 { 1035 int value; 1036 struct acpi_buffer input = { (acpi_size)sizeof(value), &value }; 1037 acpi_status status; 1038 1039 if (!count || sscanf(buf, "%i", &value) != 1) 1040 return -EINVAL; 1041 if (value < 0 || value > 2) 1042 return -EINVAL; 1043 1044 status = wmi_evaluate_method(EEEPC_WMI_MGMT_GUID, 1045 1, EEEPC_WMI_METHODID_CFVS, &input, NULL); 1046 1047 if (ACPI_FAILURE(status)) 1048 return -EIO; 1049 else 1050 return count; 1051 } 1052 1053 static DEVICE_ATTR(cpufv, S_IRUGO | S_IWUSR, NULL, store_cpufv); 1054 1055 static struct attribute *platform_attributes[] = { 1056 &dev_attr_cpufv.attr, 1057 &dev_attr_camera.attr, 1058 &dev_attr_cardr.attr, 1059 &dev_attr_touchpad.attr, 1060 NULL 1061 }; 1062 1063 static mode_t eeepc_sysfs_is_visible(struct kobject *kobj, 1064 struct attribute *attr, 1065 int idx) 1066 { 1067 bool supported = true; 1068 int devid = -1; 1069 1070 if (attr == &dev_attr_camera.attr) 1071 devid = EEEPC_WMI_DEVID_CAMERA; 1072 else if (attr == &dev_attr_cardr.attr) 1073 devid = EEEPC_WMI_DEVID_CARDREADER; 1074 else if (attr == &dev_attr_touchpad.attr) 1075 devid = EEEPC_WMI_DEVID_TOUCHPAD; 1076 1077 if (devid != -1) 1078 supported = eeepc_wmi_get_devstate_simple(devid) != -ENODEV; 1079 1080 return supported ? attr->mode : 0; 1081 } 1082 1083 static struct attribute_group platform_attribute_group = { 1084 .is_visible = eeepc_sysfs_is_visible, 1085 .attrs = platform_attributes 1086 }; 1087 1088 static void eeepc_wmi_sysfs_exit(struct platform_device *device) 1089 { 1090 sysfs_remove_group(&device->dev.kobj, &platform_attribute_group); 1091 } 1092 1093 static int eeepc_wmi_sysfs_init(struct platform_device *device) 1094 { 1095 return sysfs_create_group(&device->dev.kobj, &platform_attribute_group); 1096 } 1097 1098 /* 1099 * Platform device 1100 */ 1101 static int __init eeepc_wmi_platform_init(struct eeepc_wmi *eeepc) 1102 { 1103 return eeepc_wmi_sysfs_init(eeepc->platform_device); 1104 } 1105 1106 static void eeepc_wmi_platform_exit(struct eeepc_wmi *eeepc) 1107 { 1108 eeepc_wmi_sysfs_exit(eeepc->platform_device); 1109 } 1110 1111 /* 1112 * debugfs 1113 */ 1114 struct eeepc_wmi_debugfs_node { 1115 struct eeepc_wmi *eeepc; 1116 char *name; 1117 int (*show)(struct seq_file *m, void *data); 1118 }; 1119 1120 static int show_dsts(struct seq_file *m, void *data) 1121 { 1122 struct eeepc_wmi *eeepc = m->private; 1123 acpi_status status; 1124 u32 retval = -1; 1125 1126 status = eeepc_wmi_get_devstate(eeepc->debug.dev_id, &retval); 1127 1128 if (ACPI_FAILURE(status)) 1129 return -EIO; 1130 1131 seq_printf(m, "DSTS(%x) = %x\n", eeepc->debug.dev_id, retval); 1132 1133 return 0; 1134 } 1135 1136 static int show_devs(struct seq_file *m, void *data) 1137 { 1138 struct eeepc_wmi *eeepc = m->private; 1139 acpi_status status; 1140 u32 retval = -1; 1141 1142 status = eeepc_wmi_set_devstate(eeepc->debug.dev_id, 1143 eeepc->debug.ctrl_param, &retval); 1144 if (ACPI_FAILURE(status)) 1145 return -EIO; 1146 1147 seq_printf(m, "DEVS(%x, %x) = %x\n", eeepc->debug.dev_id, 1148 eeepc->debug.ctrl_param, retval); 1149 1150 return 0; 1151 } 1152 1153 static struct eeepc_wmi_debugfs_node eeepc_wmi_debug_files[] = { 1154 { NULL, "devs", show_devs }, 1155 { NULL, "dsts", show_dsts }, 1156 }; 1157 1158 static int eeepc_wmi_debugfs_open(struct inode *inode, struct file *file) 1159 { 1160 struct eeepc_wmi_debugfs_node *node = inode->i_private; 1161 1162 return single_open(file, node->show, node->eeepc); 1163 } 1164 1165 static const struct file_operations eeepc_wmi_debugfs_io_ops = { 1166 .owner = THIS_MODULE, 1167 .open = eeepc_wmi_debugfs_open, 1168 .read = seq_read, 1169 .llseek = seq_lseek, 1170 .release = single_release, 1171 }; 1172 1173 static void eeepc_wmi_debugfs_exit(struct eeepc_wmi *eeepc) 1174 { 1175 debugfs_remove_recursive(eeepc->debug.root); 1176 } 1177 1178 static int eeepc_wmi_debugfs_init(struct eeepc_wmi *eeepc) 1179 { 1180 struct dentry *dent; 1181 int i; 1182 1183 eeepc->debug.root = debugfs_create_dir(EEEPC_WMI_FILE, NULL); 1184 if (!eeepc->debug.root) { 1185 pr_err("failed to create debugfs directory"); 1186 goto error_debugfs; 1187 } 1188 1189 dent = debugfs_create_x32("dev_id", S_IRUGO|S_IWUSR, 1190 eeepc->debug.root, &eeepc->debug.dev_id); 1191 if (!dent) 1192 goto error_debugfs; 1193 1194 dent = debugfs_create_x32("ctrl_param", S_IRUGO|S_IWUSR, 1195 eeepc->debug.root, &eeepc->debug.ctrl_param); 1196 if (!dent) 1197 goto error_debugfs; 1198 1199 for (i = 0; i < ARRAY_SIZE(eeepc_wmi_debug_files); i++) { 1200 struct eeepc_wmi_debugfs_node *node = &eeepc_wmi_debug_files[i]; 1201 1202 node->eeepc = eeepc; 1203 dent = debugfs_create_file(node->name, S_IFREG | S_IRUGO, 1204 eeepc->debug.root, node, 1205 &eeepc_wmi_debugfs_io_ops); 1206 if (!dent) { 1207 pr_err("failed to create debug file: %s\n", node->name); 1208 goto error_debugfs; 1209 } 1210 } 1211 1212 return 0; 1213 1214 error_debugfs: 1215 eeepc_wmi_debugfs_exit(eeepc); 1216 return -ENOMEM; 1217 } 1218 1219 /* 1220 * WMI Driver 1221 */ 1222 static void eeepc_dmi_check(struct eeepc_wmi *eeepc) 1223 { 1224 const char *model; 1225 1226 model = dmi_get_system_info(DMI_PRODUCT_NAME); 1227 if (!model) 1228 return; 1229 1230 /* 1231 * Whitelist for wlan hotplug 1232 * 1233 * Eeepc 1000H needs the current hotplug code to handle 1234 * Fn+F2 correctly. We may add other Eeepc here later, but 1235 * it seems that most of the laptops supported by eeepc-wmi 1236 * don't need to be on this list 1237 */ 1238 if (strcmp(model, "1000H") == 0) { 1239 eeepc->hotplug_wireless = true; 1240 pr_info("wlan hotplug enabled\n"); 1241 } 1242 } 1243 1244 static int __init eeepc_wmi_add(struct platform_device *pdev) 1245 { 1246 struct eeepc_wmi *eeepc; 1247 acpi_status status; 1248 int err; 1249 1250 eeepc = kzalloc(sizeof(struct eeepc_wmi), GFP_KERNEL); 1251 if (!eeepc) 1252 return -ENOMEM; 1253 1254 eeepc->platform_device = pdev; 1255 platform_set_drvdata(eeepc->platform_device, eeepc); 1256 1257 eeepc->hotplug_wireless = hotplug_wireless; 1258 eeepc_dmi_check(eeepc); 1259 1260 err = eeepc_wmi_platform_init(eeepc); 1261 if (err) 1262 goto fail_platform; 1263 1264 err = eeepc_wmi_input_init(eeepc); 1265 if (err) 1266 goto fail_input; 1267 1268 err = eeepc_wmi_led_init(eeepc); 1269 if (err) 1270 goto fail_leds; 1271 1272 err = eeepc_wmi_rfkill_init(eeepc); 1273 if (err) 1274 goto fail_rfkill; 1275 1276 if (!acpi_video_backlight_support()) { 1277 err = eeepc_wmi_backlight_init(eeepc); 1278 if (err && err != -ENODEV) 1279 goto fail_backlight; 1280 } else 1281 pr_info("Backlight controlled by ACPI video driver\n"); 1282 1283 status = wmi_install_notify_handler(EEEPC_WMI_EVENT_GUID, 1284 eeepc_wmi_notify, eeepc); 1285 if (ACPI_FAILURE(status)) { 1286 pr_err("Unable to register notify handler - %d\n", 1287 status); 1288 err = -ENODEV; 1289 goto fail_wmi_handler; 1290 } 1291 1292 err = eeepc_wmi_debugfs_init(eeepc); 1293 if (err) 1294 goto fail_debugfs; 1295 1296 return 0; 1297 1298 fail_debugfs: 1299 wmi_remove_notify_handler(EEEPC_WMI_EVENT_GUID); 1300 fail_wmi_handler: 1301 eeepc_wmi_backlight_exit(eeepc); 1302 fail_backlight: 1303 eeepc_wmi_rfkill_exit(eeepc); 1304 fail_rfkill: 1305 eeepc_wmi_led_exit(eeepc); 1306 fail_leds: 1307 eeepc_wmi_input_exit(eeepc); 1308 fail_input: 1309 eeepc_wmi_platform_exit(eeepc); 1310 fail_platform: 1311 kfree(eeepc); 1312 return err; 1313 } 1314 1315 static int __exit eeepc_wmi_remove(struct platform_device *device) 1316 { 1317 struct eeepc_wmi *eeepc; 1318 1319 eeepc = platform_get_drvdata(device); 1320 wmi_remove_notify_handler(EEEPC_WMI_EVENT_GUID); 1321 eeepc_wmi_backlight_exit(eeepc); 1322 eeepc_wmi_input_exit(eeepc); 1323 eeepc_wmi_led_exit(eeepc); 1324 eeepc_wmi_rfkill_exit(eeepc); 1325 eeepc_wmi_debugfs_exit(eeepc); 1326 eeepc_wmi_platform_exit(eeepc); 1327 1328 kfree(eeepc); 1329 return 0; 1330 } 1331 1332 /* 1333 * Platform driver - hibernate/resume callbacks 1334 */ 1335 static int eeepc_hotk_thaw(struct device *device) 1336 { 1337 struct eeepc_wmi *eeepc = dev_get_drvdata(device); 1338 1339 if (eeepc->wlan_rfkill) { 1340 bool wlan; 1341 1342 /* 1343 * Work around bios bug - acpi _PTS turns off the wireless led 1344 * during suspend. Normally it restores it on resume, but 1345 * we should kick it ourselves in case hibernation is aborted. 1346 */ 1347 wlan = eeepc_wmi_get_devstate_simple(EEEPC_WMI_DEVID_WLAN); 1348 eeepc_wmi_set_devstate(EEEPC_WMI_DEVID_WLAN, wlan, NULL); 1349 } 1350 1351 return 0; 1352 } 1353 1354 static int eeepc_hotk_restore(struct device *device) 1355 { 1356 struct eeepc_wmi *eeepc = dev_get_drvdata(device); 1357 int bl; 1358 1359 /* Refresh both wlan rfkill state and pci hotplug */ 1360 if (eeepc->wlan_rfkill) 1361 eeepc_rfkill_hotplug(eeepc); 1362 1363 if (eeepc->bluetooth_rfkill) { 1364 bl = !eeepc_wmi_get_devstate_simple(EEEPC_WMI_DEVID_BLUETOOTH); 1365 rfkill_set_sw_state(eeepc->bluetooth_rfkill, bl); 1366 } 1367 if (eeepc->wimax_rfkill) { 1368 bl = !eeepc_wmi_get_devstate_simple(EEEPC_WMI_DEVID_WIMAX); 1369 rfkill_set_sw_state(eeepc->wimax_rfkill, bl); 1370 } 1371 if (eeepc->wwan3g_rfkill) { 1372 bl = !eeepc_wmi_get_devstate_simple(EEEPC_WMI_DEVID_WWAN3G); 1373 rfkill_set_sw_state(eeepc->wwan3g_rfkill, bl); 1374 } 1375 1376 return 0; 1377 } 1378 1379 static const struct dev_pm_ops eeepc_pm_ops = { 1380 .thaw = eeepc_hotk_thaw, 1381 .restore = eeepc_hotk_restore, 1382 }; 1383 1384 static struct platform_driver platform_driver = { 1385 .remove = __exit_p(eeepc_wmi_remove), 1386 .driver = { 1387 .name = EEEPC_WMI_FILE, 1388 .owner = THIS_MODULE, 1389 .pm = &eeepc_pm_ops, 1390 }, 1391 }; 1392 1393 static acpi_status __init eeepc_wmi_parse_device(acpi_handle handle, u32 level, 1394 void *context, void **retval) 1395 { 1396 pr_warning("Found legacy ATKD device (%s)", EEEPC_ACPI_HID); 1397 *(bool *)context = true; 1398 return AE_CTRL_TERMINATE; 1399 } 1400 1401 static int __init eeepc_wmi_check_atkd(void) 1402 { 1403 acpi_status status; 1404 bool found = false; 1405 1406 status = acpi_get_devices(EEEPC_ACPI_HID, eeepc_wmi_parse_device, 1407 &found, NULL); 1408 1409 if (ACPI_FAILURE(status) || !found) 1410 return 0; 1411 return -1; 1412 } 1413 1414 static int __init eeepc_wmi_probe(struct platform_device *pdev) 1415 { 1416 if (!wmi_has_guid(EEEPC_WMI_EVENT_GUID) || 1417 !wmi_has_guid(EEEPC_WMI_MGMT_GUID)) { 1418 pr_warning("No known WMI GUID found\n"); 1419 return -ENODEV; 1420 } 1421 1422 if (eeepc_wmi_check_atkd()) { 1423 pr_warning("WMI device present, but legacy ATKD device is also " 1424 "present and enabled."); 1425 pr_warning("You probably booted with acpi_osi=\"Linux\" or " 1426 "acpi_osi=\"!Windows 2009\""); 1427 pr_warning("Can't load eeepc-wmi, use default acpi_osi " 1428 "(preferred) or eeepc-laptop"); 1429 return -ENODEV; 1430 } 1431 1432 return eeepc_wmi_add(pdev); 1433 } 1434 1435 static struct platform_device *platform_device; 1436 1437 static int __init eeepc_wmi_init(void) 1438 { 1439 platform_device = platform_create_bundle(&platform_driver, 1440 eeepc_wmi_probe, 1441 NULL, 0, NULL, 0); 1442 if (IS_ERR(platform_device)) 1443 return PTR_ERR(platform_device); 1444 return 0; 1445 } 1446 1447 static void __exit eeepc_wmi_exit(void) 1448 { 1449 platform_device_unregister(platform_device); 1450 platform_driver_unregister(&platform_driver); 1451 } 1452 1453 module_init(eeepc_wmi_init); 1454 module_exit(eeepc_wmi_exit); 1455