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_DEVS 0x53564544 69 #define EEEPC_WMI_METHODID_DSTS 0x53544344 70 #define EEEPC_WMI_METHODID_CFVS 0x53564643 71 72 #define EEEPC_WMI_DEVID_BACKLIGHT 0x00050012 73 #define EEEPC_WMI_DEVID_TPDLED 0x00100011 74 #define EEEPC_WMI_DEVID_WLAN 0x00010011 75 #define EEEPC_WMI_DEVID_BLUETOOTH 0x00010013 76 #define EEEPC_WMI_DEVID_WWAN3G 0x00010019 77 78 static bool hotplug_wireless; 79 80 module_param(hotplug_wireless, bool, 0444); 81 MODULE_PARM_DESC(hotplug_wireless, 82 "Enable hotplug for wireless device. " 83 "If your laptop needs that, please report to " 84 "acpi4asus-user@lists.sourceforge.net."); 85 86 static const struct key_entry eeepc_wmi_keymap[] = { 87 /* Sleep already handled via generic ACPI code */ 88 { KE_IGNORE, NOTIFY_BRNDOWN_MIN, { KEY_BRIGHTNESSDOWN } }, 89 { KE_IGNORE, NOTIFY_BRNUP_MIN, { KEY_BRIGHTNESSUP } }, 90 { KE_KEY, 0x30, { KEY_VOLUMEUP } }, 91 { KE_KEY, 0x31, { KEY_VOLUMEDOWN } }, 92 { KE_KEY, 0x32, { KEY_MUTE } }, 93 { KE_KEY, 0x5c, { KEY_F15 } }, 94 { KE_KEY, 0x5d, { KEY_WLAN } }, 95 { KE_KEY, 0x6b, { KEY_F13 } }, /* Disable Touchpad */ 96 { KE_KEY, 0x88, { KEY_WLAN } }, 97 { KE_KEY, 0xcc, { KEY_SWITCHVIDEOMODE } }, 98 { KE_KEY, 0xe0, { KEY_PROG1 } }, 99 { KE_KEY, 0xe1, { KEY_F14 } }, 100 { KE_KEY, 0xe9, { KEY_DISPLAY_OFF } }, 101 { KE_END, 0}, 102 }; 103 104 struct bios_args { 105 u32 dev_id; 106 u32 ctrl_param; 107 }; 108 109 /* 110 * eeepc-wmi/ - debugfs root directory 111 * dev_id - current dev_id 112 * ctrl_param - current ctrl_param 113 * devs - call DEVS(dev_id, ctrl_param) and print result 114 * dsts - call DSTS(dev_id) and print result 115 */ 116 struct eeepc_wmi_debug { 117 struct dentry *root; 118 u32 dev_id; 119 u32 ctrl_param; 120 }; 121 122 struct eeepc_wmi { 123 bool hotplug_wireless; 124 125 struct input_dev *inputdev; 126 struct backlight_device *backlight_device; 127 struct platform_device *platform_device; 128 129 struct led_classdev tpd_led; 130 int tpd_led_wk; 131 struct workqueue_struct *led_workqueue; 132 struct work_struct tpd_led_work; 133 134 struct rfkill *wlan_rfkill; 135 struct rfkill *bluetooth_rfkill; 136 struct rfkill *wwan3g_rfkill; 137 138 struct hotplug_slot *hotplug_slot; 139 struct mutex hotplug_lock; 140 struct mutex wmi_lock; 141 struct workqueue_struct *hotplug_workqueue; 142 struct work_struct hotplug_work; 143 144 struct eeepc_wmi_debug debug; 145 }; 146 147 /* Only used in eeepc_wmi_init() and eeepc_wmi_exit() */ 148 static struct platform_device *platform_device; 149 150 static int eeepc_wmi_input_init(struct eeepc_wmi *eeepc) 151 { 152 int err; 153 154 eeepc->inputdev = input_allocate_device(); 155 if (!eeepc->inputdev) 156 return -ENOMEM; 157 158 eeepc->inputdev->name = "Eee PC WMI hotkeys"; 159 eeepc->inputdev->phys = EEEPC_WMI_FILE "/input0"; 160 eeepc->inputdev->id.bustype = BUS_HOST; 161 eeepc->inputdev->dev.parent = &eeepc->platform_device->dev; 162 163 err = sparse_keymap_setup(eeepc->inputdev, eeepc_wmi_keymap, NULL); 164 if (err) 165 goto err_free_dev; 166 167 err = input_register_device(eeepc->inputdev); 168 if (err) 169 goto err_free_keymap; 170 171 return 0; 172 173 err_free_keymap: 174 sparse_keymap_free(eeepc->inputdev); 175 err_free_dev: 176 input_free_device(eeepc->inputdev); 177 return err; 178 } 179 180 static void eeepc_wmi_input_exit(struct eeepc_wmi *eeepc) 181 { 182 if (eeepc->inputdev) { 183 sparse_keymap_free(eeepc->inputdev); 184 input_unregister_device(eeepc->inputdev); 185 } 186 187 eeepc->inputdev = NULL; 188 } 189 190 static acpi_status eeepc_wmi_get_devstate(u32 dev_id, u32 *retval) 191 { 192 struct acpi_buffer input = { (acpi_size)sizeof(u32), &dev_id }; 193 struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL }; 194 union acpi_object *obj; 195 acpi_status status; 196 u32 tmp; 197 198 status = wmi_evaluate_method(EEEPC_WMI_MGMT_GUID, 199 1, EEEPC_WMI_METHODID_DSTS, 200 &input, &output); 201 202 if (ACPI_FAILURE(status)) 203 return status; 204 205 obj = (union acpi_object *)output.pointer; 206 if (obj && obj->type == ACPI_TYPE_INTEGER) 207 tmp = (u32)obj->integer.value; 208 else 209 tmp = 0; 210 211 if (retval) 212 *retval = tmp; 213 214 kfree(obj); 215 216 return status; 217 218 } 219 220 static acpi_status eeepc_wmi_set_devstate(u32 dev_id, u32 ctrl_param, 221 u32 *retval) 222 { 223 struct bios_args args = { 224 .dev_id = dev_id, 225 .ctrl_param = ctrl_param, 226 }; 227 struct acpi_buffer input = { (acpi_size)sizeof(args), &args }; 228 acpi_status status; 229 230 if (!retval) { 231 status = wmi_evaluate_method(EEEPC_WMI_MGMT_GUID, 1, 232 EEEPC_WMI_METHODID_DEVS, 233 &input, NULL); 234 } else { 235 struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL }; 236 union acpi_object *obj; 237 u32 tmp; 238 239 status = wmi_evaluate_method(EEEPC_WMI_MGMT_GUID, 1, 240 EEEPC_WMI_METHODID_DEVS, 241 &input, &output); 242 243 if (ACPI_FAILURE(status)) 244 return status; 245 246 obj = (union acpi_object *)output.pointer; 247 if (obj && obj->type == ACPI_TYPE_INTEGER) 248 tmp = (u32)obj->integer.value; 249 else 250 tmp = 0; 251 252 *retval = tmp; 253 254 kfree(obj); 255 } 256 257 return status; 258 } 259 260 /* Helper for special devices with magic return codes */ 261 static int eeepc_wmi_get_devstate_simple(u32 dev_id) 262 { 263 u32 retval = 0; 264 acpi_status status; 265 266 status = eeepc_wmi_get_devstate(dev_id, &retval); 267 268 if (ACPI_FAILURE(status)) 269 return -EINVAL; 270 271 /* If the device is present, DSTS will always set some bits 272 * 0x00070000 - 1110000000000000000 - device supported 273 * 0x00060000 - 1100000000000000000 - not supported 274 * 0x00020000 - 0100000000000000000 - device supported 275 * 0x00010000 - 0010000000000000000 - not supported / special mode ? 276 */ 277 if (!retval || retval == 0x00060000) 278 return -ENODEV; 279 280 return retval & 0x1; 281 } 282 283 /* 284 * LEDs 285 */ 286 /* 287 * These functions actually update the LED's, and are called from a 288 * workqueue. By doing this as separate work rather than when the LED 289 * subsystem asks, we avoid messing with the Eeepc ACPI stuff during a 290 * potentially bad time, such as a timer interrupt. 291 */ 292 static void tpd_led_update(struct work_struct *work) 293 { 294 int ctrl_param; 295 struct eeepc_wmi *eeepc; 296 297 eeepc = container_of(work, struct eeepc_wmi, tpd_led_work); 298 299 ctrl_param = eeepc->tpd_led_wk; 300 eeepc_wmi_set_devstate(EEEPC_WMI_DEVID_TPDLED, ctrl_param, NULL); 301 } 302 303 static void tpd_led_set(struct led_classdev *led_cdev, 304 enum led_brightness value) 305 { 306 struct eeepc_wmi *eeepc; 307 308 eeepc = container_of(led_cdev, struct eeepc_wmi, tpd_led); 309 310 eeepc->tpd_led_wk = !!value; 311 queue_work(eeepc->led_workqueue, &eeepc->tpd_led_work); 312 } 313 314 static int read_tpd_state(struct eeepc_wmi *eeepc) 315 { 316 return eeepc_wmi_get_devstate_simple(EEEPC_WMI_DEVID_TPDLED); 317 } 318 319 static enum led_brightness tpd_led_get(struct led_classdev *led_cdev) 320 { 321 struct eeepc_wmi *eeepc; 322 323 eeepc = container_of(led_cdev, struct eeepc_wmi, tpd_led); 324 325 return read_tpd_state(eeepc); 326 } 327 328 static int eeepc_wmi_led_init(struct eeepc_wmi *eeepc) 329 { 330 int rv; 331 332 if (read_tpd_state(eeepc) < 0) 333 return 0; 334 335 eeepc->led_workqueue = create_singlethread_workqueue("led_workqueue"); 336 if (!eeepc->led_workqueue) 337 return -ENOMEM; 338 INIT_WORK(&eeepc->tpd_led_work, tpd_led_update); 339 340 eeepc->tpd_led.name = "eeepc::touchpad"; 341 eeepc->tpd_led.brightness_set = tpd_led_set; 342 eeepc->tpd_led.brightness_get = tpd_led_get; 343 eeepc->tpd_led.max_brightness = 1; 344 345 rv = led_classdev_register(&eeepc->platform_device->dev, 346 &eeepc->tpd_led); 347 if (rv) { 348 destroy_workqueue(eeepc->led_workqueue); 349 return rv; 350 } 351 352 return 0; 353 } 354 355 static void eeepc_wmi_led_exit(struct eeepc_wmi *eeepc) 356 { 357 if (eeepc->tpd_led.dev) 358 led_classdev_unregister(&eeepc->tpd_led); 359 if (eeepc->led_workqueue) 360 destroy_workqueue(eeepc->led_workqueue); 361 } 362 363 /* 364 * PCI hotplug (for wlan rfkill) 365 */ 366 static bool eeepc_wlan_rfkill_blocked(struct eeepc_wmi *eeepc) 367 { 368 int result = eeepc_wmi_get_devstate_simple(EEEPC_WMI_DEVID_WLAN); 369 370 if (result < 0) 371 return false; 372 return !result; 373 } 374 375 static void eeepc_rfkill_hotplug(struct eeepc_wmi *eeepc) 376 { 377 struct pci_dev *dev; 378 struct pci_bus *bus; 379 bool blocked; 380 bool absent; 381 u32 l; 382 383 mutex_lock(&eeepc->wmi_lock); 384 blocked = eeepc_wlan_rfkill_blocked(eeepc); 385 mutex_unlock(&eeepc->wmi_lock); 386 387 mutex_lock(&eeepc->hotplug_lock); 388 389 if (eeepc->wlan_rfkill) 390 rfkill_set_sw_state(eeepc->wlan_rfkill, blocked); 391 392 if (eeepc->hotplug_slot) { 393 bus = pci_find_bus(0, 1); 394 if (!bus) { 395 pr_warning("Unable to find PCI bus 1?\n"); 396 goto out_unlock; 397 } 398 399 if (pci_bus_read_config_dword(bus, 0, PCI_VENDOR_ID, &l)) { 400 pr_err("Unable to read PCI config space?\n"); 401 goto out_unlock; 402 } 403 absent = (l == 0xffffffff); 404 405 if (blocked != absent) { 406 pr_warning("BIOS says wireless lan is %s, " 407 "but the pci device is %s\n", 408 blocked ? "blocked" : "unblocked", 409 absent ? "absent" : "present"); 410 pr_warning("skipped wireless hotplug as probably " 411 "inappropriate for this model\n"); 412 goto out_unlock; 413 } 414 415 if (!blocked) { 416 dev = pci_get_slot(bus, 0); 417 if (dev) { 418 /* Device already present */ 419 pci_dev_put(dev); 420 goto out_unlock; 421 } 422 dev = pci_scan_single_device(bus, 0); 423 if (dev) { 424 pci_bus_assign_resources(bus); 425 if (pci_bus_add_device(dev)) 426 pr_err("Unable to hotplug wifi\n"); 427 } 428 } else { 429 dev = pci_get_slot(bus, 0); 430 if (dev) { 431 pci_remove_bus_device(dev); 432 pci_dev_put(dev); 433 } 434 } 435 } 436 437 out_unlock: 438 mutex_unlock(&eeepc->hotplug_lock); 439 } 440 441 static void eeepc_rfkill_notify(acpi_handle handle, u32 event, void *data) 442 { 443 struct eeepc_wmi *eeepc = data; 444 445 if (event != ACPI_NOTIFY_BUS_CHECK) 446 return; 447 448 /* 449 * We can't call directly eeepc_rfkill_hotplug because most 450 * of the time WMBC is still being executed and not reetrant. 451 * There is currently no way to tell ACPICA that we want this 452 * method to be serialized, we schedule a eeepc_rfkill_hotplug 453 * call later, in a safer context. 454 */ 455 queue_work(eeepc->hotplug_workqueue, &eeepc->hotplug_work); 456 } 457 458 static int eeepc_register_rfkill_notifier(struct eeepc_wmi *eeepc, 459 char *node) 460 { 461 acpi_status status; 462 acpi_handle handle; 463 464 status = acpi_get_handle(NULL, node, &handle); 465 466 if (ACPI_SUCCESS(status)) { 467 status = acpi_install_notify_handler(handle, 468 ACPI_SYSTEM_NOTIFY, 469 eeepc_rfkill_notify, 470 eeepc); 471 if (ACPI_FAILURE(status)) 472 pr_warning("Failed to register notify on %s\n", node); 473 } else 474 return -ENODEV; 475 476 return 0; 477 } 478 479 static void eeepc_unregister_rfkill_notifier(struct eeepc_wmi *eeepc, 480 char *node) 481 { 482 acpi_status status = AE_OK; 483 acpi_handle handle; 484 485 status = acpi_get_handle(NULL, node, &handle); 486 487 if (ACPI_SUCCESS(status)) { 488 status = acpi_remove_notify_handler(handle, 489 ACPI_SYSTEM_NOTIFY, 490 eeepc_rfkill_notify); 491 if (ACPI_FAILURE(status)) 492 pr_err("Error removing rfkill notify handler %s\n", 493 node); 494 } 495 } 496 497 static int eeepc_get_adapter_status(struct hotplug_slot *hotplug_slot, 498 u8 *value) 499 { 500 int result = eeepc_wmi_get_devstate_simple(EEEPC_WMI_DEVID_WLAN); 501 502 if (result < 0) 503 return result; 504 505 *value = !!result; 506 return 0; 507 } 508 509 static void eeepc_cleanup_pci_hotplug(struct hotplug_slot *hotplug_slot) 510 { 511 kfree(hotplug_slot->info); 512 kfree(hotplug_slot); 513 } 514 515 static struct hotplug_slot_ops eeepc_hotplug_slot_ops = { 516 .owner = THIS_MODULE, 517 .get_adapter_status = eeepc_get_adapter_status, 518 .get_power_status = eeepc_get_adapter_status, 519 }; 520 521 static void eeepc_hotplug_work(struct work_struct *work) 522 { 523 struct eeepc_wmi *eeepc; 524 525 eeepc = container_of(work, struct eeepc_wmi, hotplug_work); 526 eeepc_rfkill_hotplug(eeepc); 527 } 528 529 static int eeepc_setup_pci_hotplug(struct eeepc_wmi *eeepc) 530 { 531 int ret = -ENOMEM; 532 struct pci_bus *bus = pci_find_bus(0, 1); 533 534 if (!bus) { 535 pr_err("Unable to find wifi PCI bus\n"); 536 return -ENODEV; 537 } 538 539 eeepc->hotplug_workqueue = 540 create_singlethread_workqueue("hotplug_workqueue"); 541 if (!eeepc->hotplug_workqueue) 542 goto error_workqueue; 543 544 INIT_WORK(&eeepc->hotplug_work, eeepc_hotplug_work); 545 546 eeepc->hotplug_slot = kzalloc(sizeof(struct hotplug_slot), GFP_KERNEL); 547 if (!eeepc->hotplug_slot) 548 goto error_slot; 549 550 eeepc->hotplug_slot->info = kzalloc(sizeof(struct hotplug_slot_info), 551 GFP_KERNEL); 552 if (!eeepc->hotplug_slot->info) 553 goto error_info; 554 555 eeepc->hotplug_slot->private = eeepc; 556 eeepc->hotplug_slot->release = &eeepc_cleanup_pci_hotplug; 557 eeepc->hotplug_slot->ops = &eeepc_hotplug_slot_ops; 558 eeepc_get_adapter_status(eeepc->hotplug_slot, 559 &eeepc->hotplug_slot->info->adapter_status); 560 561 ret = pci_hp_register(eeepc->hotplug_slot, bus, 0, "eeepc-wifi"); 562 if (ret) { 563 pr_err("Unable to register hotplug slot - %d\n", ret); 564 goto error_register; 565 } 566 567 return 0; 568 569 error_register: 570 kfree(eeepc->hotplug_slot->info); 571 error_info: 572 kfree(eeepc->hotplug_slot); 573 eeepc->hotplug_slot = NULL; 574 error_slot: 575 destroy_workqueue(eeepc->hotplug_workqueue); 576 error_workqueue: 577 return ret; 578 } 579 580 /* 581 * Rfkill devices 582 */ 583 static int eeepc_rfkill_set(void *data, bool blocked) 584 { 585 int dev_id = (unsigned long)data; 586 u32 ctrl_param = !blocked; 587 acpi_status status; 588 589 status = eeepc_wmi_set_devstate(dev_id, ctrl_param, NULL); 590 591 if (ACPI_FAILURE(status)) 592 return -EIO; 593 594 return 0; 595 } 596 597 static void eeepc_rfkill_query(struct rfkill *rfkill, void *data) 598 { 599 int dev_id = (unsigned long)data; 600 int result; 601 602 result = eeepc_wmi_get_devstate_simple(dev_id); 603 604 if (result < 0) 605 return ; 606 607 rfkill_set_sw_state(rfkill, !result); 608 } 609 610 static int eeepc_rfkill_wlan_set(void *data, bool blocked) 611 { 612 struct eeepc_wmi *eeepc = data; 613 int ret; 614 615 /* 616 * This handler is enabled only if hotplug is enabled. 617 * In this case, the eeepc_wmi_set_devstate() will 618 * trigger a wmi notification and we need to wait 619 * this call to finish before being able to call 620 * any wmi method 621 */ 622 mutex_lock(&eeepc->wmi_lock); 623 ret = eeepc_rfkill_set((void *)(long)EEEPC_WMI_DEVID_WLAN, blocked); 624 mutex_unlock(&eeepc->wmi_lock); 625 return ret; 626 } 627 628 static void eeepc_rfkill_wlan_query(struct rfkill *rfkill, void *data) 629 { 630 eeepc_rfkill_query(rfkill, (void *)(long)EEEPC_WMI_DEVID_WLAN); 631 } 632 633 static const struct rfkill_ops eeepc_rfkill_wlan_ops = { 634 .set_block = eeepc_rfkill_wlan_set, 635 .query = eeepc_rfkill_wlan_query, 636 }; 637 638 static const struct rfkill_ops eeepc_rfkill_ops = { 639 .set_block = eeepc_rfkill_set, 640 .query = eeepc_rfkill_query, 641 }; 642 643 static int eeepc_new_rfkill(struct eeepc_wmi *eeepc, 644 struct rfkill **rfkill, 645 const char *name, 646 enum rfkill_type type, int dev_id) 647 { 648 int result = eeepc_wmi_get_devstate_simple(dev_id); 649 650 if (result < 0) 651 return result; 652 653 if (dev_id == EEEPC_WMI_DEVID_WLAN && eeepc->hotplug_wireless) 654 *rfkill = rfkill_alloc(name, &eeepc->platform_device->dev, type, 655 &eeepc_rfkill_wlan_ops, eeepc); 656 else 657 *rfkill = rfkill_alloc(name, &eeepc->platform_device->dev, type, 658 &eeepc_rfkill_ops, (void *)(long)dev_id); 659 660 if (!*rfkill) 661 return -EINVAL; 662 663 rfkill_init_sw_state(*rfkill, !result); 664 result = rfkill_register(*rfkill); 665 if (result) { 666 rfkill_destroy(*rfkill); 667 *rfkill = NULL; 668 return result; 669 } 670 return 0; 671 } 672 673 static void eeepc_wmi_rfkill_exit(struct eeepc_wmi *eeepc) 674 { 675 eeepc_unregister_rfkill_notifier(eeepc, "\\_SB.PCI0.P0P5"); 676 eeepc_unregister_rfkill_notifier(eeepc, "\\_SB.PCI0.P0P6"); 677 eeepc_unregister_rfkill_notifier(eeepc, "\\_SB.PCI0.P0P7"); 678 if (eeepc->wlan_rfkill) { 679 rfkill_unregister(eeepc->wlan_rfkill); 680 rfkill_destroy(eeepc->wlan_rfkill); 681 eeepc->wlan_rfkill = NULL; 682 } 683 /* 684 * Refresh pci hotplug in case the rfkill state was changed after 685 * eeepc_unregister_rfkill_notifier() 686 */ 687 eeepc_rfkill_hotplug(eeepc); 688 if (eeepc->hotplug_slot) 689 pci_hp_deregister(eeepc->hotplug_slot); 690 if (eeepc->hotplug_workqueue) 691 destroy_workqueue(eeepc->hotplug_workqueue); 692 693 if (eeepc->bluetooth_rfkill) { 694 rfkill_unregister(eeepc->bluetooth_rfkill); 695 rfkill_destroy(eeepc->bluetooth_rfkill); 696 eeepc->bluetooth_rfkill = NULL; 697 } 698 if (eeepc->wwan3g_rfkill) { 699 rfkill_unregister(eeepc->wwan3g_rfkill); 700 rfkill_destroy(eeepc->wwan3g_rfkill); 701 eeepc->wwan3g_rfkill = NULL; 702 } 703 } 704 705 static int eeepc_wmi_rfkill_init(struct eeepc_wmi *eeepc) 706 { 707 int result = 0; 708 709 mutex_init(&eeepc->hotplug_lock); 710 mutex_init(&eeepc->wmi_lock); 711 712 result = eeepc_new_rfkill(eeepc, &eeepc->wlan_rfkill, 713 "eeepc-wlan", RFKILL_TYPE_WLAN, 714 EEEPC_WMI_DEVID_WLAN); 715 716 if (result && result != -ENODEV) 717 goto exit; 718 719 result = eeepc_new_rfkill(eeepc, &eeepc->bluetooth_rfkill, 720 "eeepc-bluetooth", RFKILL_TYPE_BLUETOOTH, 721 EEEPC_WMI_DEVID_BLUETOOTH); 722 723 if (result && result != -ENODEV) 724 goto exit; 725 726 result = eeepc_new_rfkill(eeepc, &eeepc->wwan3g_rfkill, 727 "eeepc-wwan3g", RFKILL_TYPE_WWAN, 728 EEEPC_WMI_DEVID_WWAN3G); 729 730 if (result && result != -ENODEV) 731 goto exit; 732 733 result = eeepc_setup_pci_hotplug(eeepc); 734 /* 735 * If we get -EBUSY then something else is handling the PCI hotplug - 736 * don't fail in this case 737 */ 738 if (result == -EBUSY) 739 result = 0; 740 741 eeepc_register_rfkill_notifier(eeepc, "\\_SB.PCI0.P0P5"); 742 eeepc_register_rfkill_notifier(eeepc, "\\_SB.PCI0.P0P6"); 743 eeepc_register_rfkill_notifier(eeepc, "\\_SB.PCI0.P0P7"); 744 /* 745 * Refresh pci hotplug in case the rfkill state was changed during 746 * setup. 747 */ 748 eeepc_rfkill_hotplug(eeepc); 749 750 exit: 751 if (result && result != -ENODEV) 752 eeepc_wmi_rfkill_exit(eeepc); 753 754 if (result == -ENODEV) 755 result = 0; 756 757 return result; 758 } 759 760 /* 761 * Backlight 762 */ 763 static int read_brightness(struct backlight_device *bd) 764 { 765 u32 retval; 766 acpi_status status; 767 768 status = eeepc_wmi_get_devstate(EEEPC_WMI_DEVID_BACKLIGHT, &retval); 769 770 if (ACPI_FAILURE(status)) 771 return -1; 772 else 773 return retval & 0xFF; 774 } 775 776 static int update_bl_status(struct backlight_device *bd) 777 { 778 779 u32 ctrl_param; 780 acpi_status status; 781 782 ctrl_param = bd->props.brightness; 783 784 status = eeepc_wmi_set_devstate(EEEPC_WMI_DEVID_BACKLIGHT, 785 ctrl_param, NULL); 786 787 if (ACPI_FAILURE(status)) 788 return -1; 789 else 790 return 0; 791 } 792 793 static const struct backlight_ops eeepc_wmi_bl_ops = { 794 .get_brightness = read_brightness, 795 .update_status = update_bl_status, 796 }; 797 798 static int eeepc_wmi_backlight_notify(struct eeepc_wmi *eeepc, int code) 799 { 800 struct backlight_device *bd = eeepc->backlight_device; 801 int old = bd->props.brightness; 802 int new = old; 803 804 if (code >= NOTIFY_BRNUP_MIN && code <= NOTIFY_BRNUP_MAX) 805 new = code - NOTIFY_BRNUP_MIN + 1; 806 else if (code >= NOTIFY_BRNDOWN_MIN && code <= NOTIFY_BRNDOWN_MAX) 807 new = code - NOTIFY_BRNDOWN_MIN; 808 809 bd->props.brightness = new; 810 backlight_update_status(bd); 811 backlight_force_update(bd, BACKLIGHT_UPDATE_HOTKEY); 812 813 return old; 814 } 815 816 static int eeepc_wmi_backlight_init(struct eeepc_wmi *eeepc) 817 { 818 struct backlight_device *bd; 819 struct backlight_properties props; 820 821 memset(&props, 0, sizeof(struct backlight_properties)); 822 props.max_brightness = 15; 823 bd = backlight_device_register(EEEPC_WMI_FILE, 824 &eeepc->platform_device->dev, eeepc, 825 &eeepc_wmi_bl_ops, &props); 826 if (IS_ERR(bd)) { 827 pr_err("Could not register backlight device\n"); 828 return PTR_ERR(bd); 829 } 830 831 eeepc->backlight_device = bd; 832 833 bd->props.brightness = read_brightness(bd); 834 bd->props.power = FB_BLANK_UNBLANK; 835 backlight_update_status(bd); 836 837 return 0; 838 } 839 840 static void eeepc_wmi_backlight_exit(struct eeepc_wmi *eeepc) 841 { 842 if (eeepc->backlight_device) 843 backlight_device_unregister(eeepc->backlight_device); 844 845 eeepc->backlight_device = NULL; 846 } 847 848 static void eeepc_wmi_notify(u32 value, void *context) 849 { 850 struct eeepc_wmi *eeepc = context; 851 struct acpi_buffer response = { ACPI_ALLOCATE_BUFFER, NULL }; 852 union acpi_object *obj; 853 acpi_status status; 854 int code; 855 int orig_code; 856 857 status = wmi_get_event_data(value, &response); 858 if (status != AE_OK) { 859 pr_err("bad event status 0x%x\n", status); 860 return; 861 } 862 863 obj = (union acpi_object *)response.pointer; 864 865 if (obj && obj->type == ACPI_TYPE_INTEGER) { 866 code = obj->integer.value; 867 orig_code = code; 868 869 if (code >= NOTIFY_BRNUP_MIN && code <= NOTIFY_BRNUP_MAX) 870 code = NOTIFY_BRNUP_MIN; 871 else if (code >= NOTIFY_BRNDOWN_MIN && 872 code <= NOTIFY_BRNDOWN_MAX) 873 code = NOTIFY_BRNDOWN_MIN; 874 875 if (code == NOTIFY_BRNUP_MIN || code == NOTIFY_BRNDOWN_MIN) { 876 if (!acpi_video_backlight_support()) 877 eeepc_wmi_backlight_notify(eeepc, orig_code); 878 } 879 880 if (!sparse_keymap_report_event(eeepc->inputdev, 881 code, 1, true)) 882 pr_info("Unknown key %x pressed\n", code); 883 } 884 885 kfree(obj); 886 } 887 888 static ssize_t store_cpufv(struct device *dev, struct device_attribute *attr, 889 const char *buf, size_t count) 890 { 891 int value; 892 struct acpi_buffer input = { (acpi_size)sizeof(value), &value }; 893 acpi_status status; 894 895 if (!count || sscanf(buf, "%i", &value) != 1) 896 return -EINVAL; 897 if (value < 0 || value > 2) 898 return -EINVAL; 899 900 status = wmi_evaluate_method(EEEPC_WMI_MGMT_GUID, 901 1, EEEPC_WMI_METHODID_CFVS, &input, NULL); 902 903 if (ACPI_FAILURE(status)) 904 return -EIO; 905 else 906 return count; 907 } 908 909 static DEVICE_ATTR(cpufv, S_IRUGO | S_IWUSR, NULL, store_cpufv); 910 911 static struct attribute *platform_attributes[] = { 912 &dev_attr_cpufv.attr, 913 NULL 914 }; 915 916 static struct attribute_group platform_attribute_group = { 917 .attrs = platform_attributes 918 }; 919 920 static void eeepc_wmi_sysfs_exit(struct platform_device *device) 921 { 922 sysfs_remove_group(&device->dev.kobj, &platform_attribute_group); 923 } 924 925 static int eeepc_wmi_sysfs_init(struct platform_device *device) 926 { 927 return sysfs_create_group(&device->dev.kobj, &platform_attribute_group); 928 } 929 930 /* 931 * Platform device 932 */ 933 static int __init eeepc_wmi_platform_init(struct eeepc_wmi *eeepc) 934 { 935 int err; 936 937 eeepc->platform_device = platform_device_alloc(EEEPC_WMI_FILE, -1); 938 if (!eeepc->platform_device) 939 return -ENOMEM; 940 platform_set_drvdata(eeepc->platform_device, eeepc); 941 942 err = platform_device_add(eeepc->platform_device); 943 if (err) 944 goto fail_platform_device; 945 946 err = eeepc_wmi_sysfs_init(eeepc->platform_device); 947 if (err) 948 goto fail_sysfs; 949 return 0; 950 951 fail_sysfs: 952 platform_device_del(eeepc->platform_device); 953 fail_platform_device: 954 platform_device_put(eeepc->platform_device); 955 return err; 956 } 957 958 static void eeepc_wmi_platform_exit(struct eeepc_wmi *eeepc) 959 { 960 eeepc_wmi_sysfs_exit(eeepc->platform_device); 961 platform_device_unregister(eeepc->platform_device); 962 } 963 964 /* 965 * debugfs 966 */ 967 struct eeepc_wmi_debugfs_node { 968 struct eeepc_wmi *eeepc; 969 char *name; 970 int (*show)(struct seq_file *m, void *data); 971 }; 972 973 static int show_dsts(struct seq_file *m, void *data) 974 { 975 struct eeepc_wmi *eeepc = m->private; 976 acpi_status status; 977 u32 retval = -1; 978 979 status = eeepc_wmi_get_devstate(eeepc->debug.dev_id, &retval); 980 981 if (ACPI_FAILURE(status)) 982 return -EIO; 983 984 seq_printf(m, "DSTS(%x) = %x\n", eeepc->debug.dev_id, retval); 985 986 return 0; 987 } 988 989 static int show_devs(struct seq_file *m, void *data) 990 { 991 struct eeepc_wmi *eeepc = m->private; 992 acpi_status status; 993 u32 retval = -1; 994 995 status = eeepc_wmi_set_devstate(eeepc->debug.dev_id, 996 eeepc->debug.ctrl_param, &retval); 997 if (ACPI_FAILURE(status)) 998 return -EIO; 999 1000 seq_printf(m, "DEVS(%x, %x) = %x\n", eeepc->debug.dev_id, 1001 eeepc->debug.ctrl_param, retval); 1002 1003 return 0; 1004 } 1005 1006 static struct eeepc_wmi_debugfs_node eeepc_wmi_debug_files[] = { 1007 { NULL, "devs", show_devs }, 1008 { NULL, "dsts", show_dsts }, 1009 }; 1010 1011 static int eeepc_wmi_debugfs_open(struct inode *inode, struct file *file) 1012 { 1013 struct eeepc_wmi_debugfs_node *node = inode->i_private; 1014 1015 return single_open(file, node->show, node->eeepc); 1016 } 1017 1018 static const struct file_operations eeepc_wmi_debugfs_io_ops = { 1019 .owner = THIS_MODULE, 1020 .open = eeepc_wmi_debugfs_open, 1021 .read = seq_read, 1022 .llseek = seq_lseek, 1023 .release = single_release, 1024 }; 1025 1026 static void eeepc_wmi_debugfs_exit(struct eeepc_wmi *eeepc) 1027 { 1028 debugfs_remove_recursive(eeepc->debug.root); 1029 } 1030 1031 static int eeepc_wmi_debugfs_init(struct eeepc_wmi *eeepc) 1032 { 1033 struct dentry *dent; 1034 int i; 1035 1036 eeepc->debug.root = debugfs_create_dir(EEEPC_WMI_FILE, NULL); 1037 if (!eeepc->debug.root) { 1038 pr_err("failed to create debugfs directory"); 1039 goto error_debugfs; 1040 } 1041 1042 dent = debugfs_create_x32("dev_id", S_IRUGO|S_IWUSR, 1043 eeepc->debug.root, &eeepc->debug.dev_id); 1044 if (!dent) 1045 goto error_debugfs; 1046 1047 dent = debugfs_create_x32("ctrl_param", S_IRUGO|S_IWUSR, 1048 eeepc->debug.root, &eeepc->debug.ctrl_param); 1049 if (!dent) 1050 goto error_debugfs; 1051 1052 for (i = 0; i < ARRAY_SIZE(eeepc_wmi_debug_files); i++) { 1053 struct eeepc_wmi_debugfs_node *node = &eeepc_wmi_debug_files[i]; 1054 1055 node->eeepc = eeepc; 1056 dent = debugfs_create_file(node->name, S_IFREG | S_IRUGO, 1057 eeepc->debug.root, node, 1058 &eeepc_wmi_debugfs_io_ops); 1059 if (!dent) { 1060 pr_err("failed to create debug file: %s\n", node->name); 1061 goto error_debugfs; 1062 } 1063 } 1064 1065 return 0; 1066 1067 error_debugfs: 1068 eeepc_wmi_debugfs_exit(eeepc); 1069 return -ENOMEM; 1070 } 1071 1072 /* 1073 * WMI Driver 1074 */ 1075 static void eeepc_dmi_check(struct eeepc_wmi *eeepc) 1076 { 1077 const char *model; 1078 1079 model = dmi_get_system_info(DMI_PRODUCT_NAME); 1080 if (!model) 1081 return; 1082 1083 /* 1084 * Whitelist for wlan hotplug 1085 * 1086 * Eeepc 1000H needs the current hotplug code to handle 1087 * Fn+F2 correctly. We may add other Eeepc here later, but 1088 * it seems that most of the laptops supported by eeepc-wmi 1089 * don't need to be on this list 1090 */ 1091 if (strcmp(model, "1000H") == 0) { 1092 eeepc->hotplug_wireless = true; 1093 pr_info("wlan hotplug enabled\n"); 1094 } 1095 } 1096 1097 static struct platform_device * __init eeepc_wmi_add(void) 1098 { 1099 struct eeepc_wmi *eeepc; 1100 acpi_status status; 1101 int err; 1102 1103 eeepc = kzalloc(sizeof(struct eeepc_wmi), GFP_KERNEL); 1104 if (!eeepc) 1105 return ERR_PTR(-ENOMEM); 1106 1107 eeepc->hotplug_wireless = hotplug_wireless; 1108 eeepc_dmi_check(eeepc); 1109 1110 /* 1111 * Register the platform device first. It is used as a parent for the 1112 * sub-devices below. 1113 */ 1114 err = eeepc_wmi_platform_init(eeepc); 1115 if (err) 1116 goto fail_platform; 1117 1118 err = eeepc_wmi_input_init(eeepc); 1119 if (err) 1120 goto fail_input; 1121 1122 err = eeepc_wmi_led_init(eeepc); 1123 if (err) 1124 goto fail_leds; 1125 1126 err = eeepc_wmi_rfkill_init(eeepc); 1127 if (err) 1128 goto fail_rfkill; 1129 1130 if (!acpi_video_backlight_support()) { 1131 err = eeepc_wmi_backlight_init(eeepc); 1132 if (err) 1133 goto fail_backlight; 1134 } else 1135 pr_info("Backlight controlled by ACPI video driver\n"); 1136 1137 status = wmi_install_notify_handler(EEEPC_WMI_EVENT_GUID, 1138 eeepc_wmi_notify, eeepc); 1139 if (ACPI_FAILURE(status)) { 1140 pr_err("Unable to register notify handler - %d\n", 1141 status); 1142 err = -ENODEV; 1143 goto fail_wmi_handler; 1144 } 1145 1146 err = eeepc_wmi_debugfs_init(eeepc); 1147 if (err) 1148 goto fail_debugfs; 1149 1150 return eeepc->platform_device; 1151 1152 fail_debugfs: 1153 wmi_remove_notify_handler(EEEPC_WMI_EVENT_GUID); 1154 fail_wmi_handler: 1155 eeepc_wmi_backlight_exit(eeepc); 1156 fail_backlight: 1157 eeepc_wmi_rfkill_exit(eeepc); 1158 fail_rfkill: 1159 eeepc_wmi_led_exit(eeepc); 1160 fail_leds: 1161 eeepc_wmi_input_exit(eeepc); 1162 fail_input: 1163 eeepc_wmi_platform_exit(eeepc); 1164 fail_platform: 1165 kfree(eeepc); 1166 return ERR_PTR(err); 1167 } 1168 1169 static int eeepc_wmi_remove(struct platform_device *device) 1170 { 1171 struct eeepc_wmi *eeepc; 1172 1173 eeepc = platform_get_drvdata(device); 1174 wmi_remove_notify_handler(EEEPC_WMI_EVENT_GUID); 1175 eeepc_wmi_backlight_exit(eeepc); 1176 eeepc_wmi_input_exit(eeepc); 1177 eeepc_wmi_led_exit(eeepc); 1178 eeepc_wmi_rfkill_exit(eeepc); 1179 eeepc_wmi_debugfs_exit(eeepc); 1180 eeepc_wmi_platform_exit(eeepc); 1181 1182 kfree(eeepc); 1183 return 0; 1184 } 1185 1186 static struct platform_driver platform_driver = { 1187 .driver = { 1188 .name = EEEPC_WMI_FILE, 1189 .owner = THIS_MODULE, 1190 }, 1191 }; 1192 1193 static acpi_status __init eeepc_wmi_parse_device(acpi_handle handle, u32 level, 1194 void *context, void **retval) 1195 { 1196 pr_warning("Found legacy ATKD device (%s)", EEEPC_ACPI_HID); 1197 *(bool *)context = true; 1198 return AE_CTRL_TERMINATE; 1199 } 1200 1201 static int __init eeepc_wmi_check_atkd(void) 1202 { 1203 acpi_status status; 1204 bool found = false; 1205 1206 status = acpi_get_devices(EEEPC_ACPI_HID, eeepc_wmi_parse_device, 1207 &found, NULL); 1208 1209 if (ACPI_FAILURE(status) || !found) 1210 return 0; 1211 return -1; 1212 } 1213 1214 static int __init eeepc_wmi_init(void) 1215 { 1216 int err; 1217 1218 if (!wmi_has_guid(EEEPC_WMI_EVENT_GUID) || 1219 !wmi_has_guid(EEEPC_WMI_MGMT_GUID)) { 1220 pr_warning("No known WMI GUID found\n"); 1221 return -ENODEV; 1222 } 1223 1224 if (eeepc_wmi_check_atkd()) { 1225 pr_warning("WMI device present, but legacy ATKD device is also " 1226 "present and enabled."); 1227 pr_warning("You probably booted with acpi_osi=\"Linux\" or " 1228 "acpi_osi=\"!Windows 2009\""); 1229 pr_warning("Can't load eeepc-wmi, use default acpi_osi " 1230 "(preferred) or eeepc-laptop"); 1231 return -ENODEV; 1232 } 1233 1234 platform_device = eeepc_wmi_add(); 1235 if (IS_ERR(platform_device)) { 1236 err = PTR_ERR(platform_device); 1237 goto fail_eeepc_wmi; 1238 } 1239 1240 err = platform_driver_register(&platform_driver); 1241 if (err) { 1242 pr_warning("Unable to register platform driver\n"); 1243 goto fail_platform_driver; 1244 } 1245 1246 return 0; 1247 1248 fail_platform_driver: 1249 eeepc_wmi_remove(platform_device); 1250 fail_eeepc_wmi: 1251 return err; 1252 } 1253 1254 static void __exit eeepc_wmi_exit(void) 1255 { 1256 eeepc_wmi_remove(platform_device); 1257 platform_driver_unregister(&platform_driver); 1258 } 1259 1260 module_init(eeepc_wmi_init); 1261 module_exit(eeepc_wmi_exit); 1262