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 /* 261 * LEDs 262 */ 263 /* 264 * These functions actually update the LED's, and are called from a 265 * workqueue. By doing this as separate work rather than when the LED 266 * subsystem asks, we avoid messing with the Eeepc ACPI stuff during a 267 * potentially bad time, such as a timer interrupt. 268 */ 269 static void tpd_led_update(struct work_struct *work) 270 { 271 int ctrl_param; 272 struct eeepc_wmi *eeepc; 273 274 eeepc = container_of(work, struct eeepc_wmi, tpd_led_work); 275 276 ctrl_param = eeepc->tpd_led_wk; 277 eeepc_wmi_set_devstate(EEEPC_WMI_DEVID_TPDLED, ctrl_param, NULL); 278 } 279 280 static void tpd_led_set(struct led_classdev *led_cdev, 281 enum led_brightness value) 282 { 283 struct eeepc_wmi *eeepc; 284 285 eeepc = container_of(led_cdev, struct eeepc_wmi, tpd_led); 286 287 eeepc->tpd_led_wk = !!value; 288 queue_work(eeepc->led_workqueue, &eeepc->tpd_led_work); 289 } 290 291 static int read_tpd_state(struct eeepc_wmi *eeepc) 292 { 293 u32 retval; 294 acpi_status status; 295 296 status = eeepc_wmi_get_devstate(EEEPC_WMI_DEVID_TPDLED, &retval); 297 298 if (ACPI_FAILURE(status)) 299 return -1; 300 else if (!retval || retval == 0x00060000) 301 /* 302 * if touchpad led is present, DSTS will set some bits, 303 * usually 0x00020000. 304 * 0x00060000 means that the device is not supported 305 */ 306 return -ENODEV; 307 else 308 /* Status is stored in the first bit */ 309 return retval & 0x1; 310 } 311 312 static enum led_brightness tpd_led_get(struct led_classdev *led_cdev) 313 { 314 struct eeepc_wmi *eeepc; 315 316 eeepc = container_of(led_cdev, struct eeepc_wmi, tpd_led); 317 318 return read_tpd_state(eeepc); 319 } 320 321 static int eeepc_wmi_led_init(struct eeepc_wmi *eeepc) 322 { 323 int rv; 324 325 if (read_tpd_state(eeepc) < 0) 326 return 0; 327 328 eeepc->led_workqueue = create_singlethread_workqueue("led_workqueue"); 329 if (!eeepc->led_workqueue) 330 return -ENOMEM; 331 INIT_WORK(&eeepc->tpd_led_work, tpd_led_update); 332 333 eeepc->tpd_led.name = "eeepc::touchpad"; 334 eeepc->tpd_led.brightness_set = tpd_led_set; 335 eeepc->tpd_led.brightness_get = tpd_led_get; 336 eeepc->tpd_led.max_brightness = 1; 337 338 rv = led_classdev_register(&eeepc->platform_device->dev, 339 &eeepc->tpd_led); 340 if (rv) { 341 destroy_workqueue(eeepc->led_workqueue); 342 return rv; 343 } 344 345 return 0; 346 } 347 348 static void eeepc_wmi_led_exit(struct eeepc_wmi *eeepc) 349 { 350 if (eeepc->tpd_led.dev) 351 led_classdev_unregister(&eeepc->tpd_led); 352 if (eeepc->led_workqueue) 353 destroy_workqueue(eeepc->led_workqueue); 354 } 355 356 /* 357 * PCI hotplug (for wlan rfkill) 358 */ 359 static bool eeepc_wlan_rfkill_blocked(struct eeepc_wmi *eeepc) 360 { 361 u32 retval; 362 acpi_status status; 363 364 status = eeepc_wmi_get_devstate(EEEPC_WMI_DEVID_WLAN, &retval); 365 366 if (ACPI_FAILURE(status)) 367 return false; 368 369 return !(retval & 0x1); 370 } 371 372 static void eeepc_rfkill_hotplug(struct eeepc_wmi *eeepc) 373 { 374 struct pci_dev *dev; 375 struct pci_bus *bus; 376 bool blocked; 377 bool absent; 378 u32 l; 379 380 mutex_lock(&eeepc->wmi_lock); 381 blocked = eeepc_wlan_rfkill_blocked(eeepc); 382 mutex_unlock(&eeepc->wmi_lock); 383 384 mutex_lock(&eeepc->hotplug_lock); 385 386 if (eeepc->wlan_rfkill) 387 rfkill_set_sw_state(eeepc->wlan_rfkill, blocked); 388 389 if (eeepc->hotplug_slot) { 390 bus = pci_find_bus(0, 1); 391 if (!bus) { 392 pr_warning("Unable to find PCI bus 1?\n"); 393 goto out_unlock; 394 } 395 396 if (pci_bus_read_config_dword(bus, 0, PCI_VENDOR_ID, &l)) { 397 pr_err("Unable to read PCI config space?\n"); 398 goto out_unlock; 399 } 400 absent = (l == 0xffffffff); 401 402 if (blocked != absent) { 403 pr_warning("BIOS says wireless lan is %s, " 404 "but the pci device is %s\n", 405 blocked ? "blocked" : "unblocked", 406 absent ? "absent" : "present"); 407 pr_warning("skipped wireless hotplug as probably " 408 "inappropriate for this model\n"); 409 goto out_unlock; 410 } 411 412 if (!blocked) { 413 dev = pci_get_slot(bus, 0); 414 if (dev) { 415 /* Device already present */ 416 pci_dev_put(dev); 417 goto out_unlock; 418 } 419 dev = pci_scan_single_device(bus, 0); 420 if (dev) { 421 pci_bus_assign_resources(bus); 422 if (pci_bus_add_device(dev)) 423 pr_err("Unable to hotplug wifi\n"); 424 } 425 } else { 426 dev = pci_get_slot(bus, 0); 427 if (dev) { 428 pci_remove_bus_device(dev); 429 pci_dev_put(dev); 430 } 431 } 432 } 433 434 out_unlock: 435 mutex_unlock(&eeepc->hotplug_lock); 436 } 437 438 static void eeepc_rfkill_notify(acpi_handle handle, u32 event, void *data) 439 { 440 struct eeepc_wmi *eeepc = data; 441 442 if (event != ACPI_NOTIFY_BUS_CHECK) 443 return; 444 445 /* 446 * We can't call directly eeepc_rfkill_hotplug because most 447 * of the time WMBC is still being executed and not reetrant. 448 * There is currently no way to tell ACPICA that we want this 449 * method to be serialized, we schedule a eeepc_rfkill_hotplug 450 * call later, in a safer context. 451 */ 452 queue_work(eeepc->hotplug_workqueue, &eeepc->hotplug_work); 453 } 454 455 static int eeepc_register_rfkill_notifier(struct eeepc_wmi *eeepc, 456 char *node) 457 { 458 acpi_status status; 459 acpi_handle handle; 460 461 status = acpi_get_handle(NULL, node, &handle); 462 463 if (ACPI_SUCCESS(status)) { 464 status = acpi_install_notify_handler(handle, 465 ACPI_SYSTEM_NOTIFY, 466 eeepc_rfkill_notify, 467 eeepc); 468 if (ACPI_FAILURE(status)) 469 pr_warning("Failed to register notify on %s\n", node); 470 } else 471 return -ENODEV; 472 473 return 0; 474 } 475 476 static void eeepc_unregister_rfkill_notifier(struct eeepc_wmi *eeepc, 477 char *node) 478 { 479 acpi_status status = AE_OK; 480 acpi_handle handle; 481 482 status = acpi_get_handle(NULL, node, &handle); 483 484 if (ACPI_SUCCESS(status)) { 485 status = acpi_remove_notify_handler(handle, 486 ACPI_SYSTEM_NOTIFY, 487 eeepc_rfkill_notify); 488 if (ACPI_FAILURE(status)) 489 pr_err("Error removing rfkill notify handler %s\n", 490 node); 491 } 492 } 493 494 static int eeepc_get_adapter_status(struct hotplug_slot *hotplug_slot, 495 u8 *value) 496 { 497 u32 retval; 498 acpi_status status; 499 500 status = eeepc_wmi_get_devstate(EEEPC_WMI_DEVID_WLAN, &retval); 501 502 if (ACPI_FAILURE(status)) 503 return -EIO; 504 505 if (!retval || retval == 0x00060000) 506 return -ENODEV; 507 else 508 *value = (retval & 0x1); 509 510 return 0; 511 } 512 513 static void eeepc_cleanup_pci_hotplug(struct hotplug_slot *hotplug_slot) 514 { 515 kfree(hotplug_slot->info); 516 kfree(hotplug_slot); 517 } 518 519 static struct hotplug_slot_ops eeepc_hotplug_slot_ops = { 520 .owner = THIS_MODULE, 521 .get_adapter_status = eeepc_get_adapter_status, 522 .get_power_status = eeepc_get_adapter_status, 523 }; 524 525 static void eeepc_hotplug_work(struct work_struct *work) 526 { 527 struct eeepc_wmi *eeepc; 528 529 eeepc = container_of(work, struct eeepc_wmi, hotplug_work); 530 eeepc_rfkill_hotplug(eeepc); 531 } 532 533 static int eeepc_setup_pci_hotplug(struct eeepc_wmi *eeepc) 534 { 535 int ret = -ENOMEM; 536 struct pci_bus *bus = pci_find_bus(0, 1); 537 538 if (!bus) { 539 pr_err("Unable to find wifi PCI bus\n"); 540 return -ENODEV; 541 } 542 543 eeepc->hotplug_workqueue = 544 create_singlethread_workqueue("hotplug_workqueue"); 545 if (!eeepc->hotplug_workqueue) 546 goto error_workqueue; 547 548 INIT_WORK(&eeepc->hotplug_work, eeepc_hotplug_work); 549 550 eeepc->hotplug_slot = kzalloc(sizeof(struct hotplug_slot), GFP_KERNEL); 551 if (!eeepc->hotplug_slot) 552 goto error_slot; 553 554 eeepc->hotplug_slot->info = kzalloc(sizeof(struct hotplug_slot_info), 555 GFP_KERNEL); 556 if (!eeepc->hotplug_slot->info) 557 goto error_info; 558 559 eeepc->hotplug_slot->private = eeepc; 560 eeepc->hotplug_slot->release = &eeepc_cleanup_pci_hotplug; 561 eeepc->hotplug_slot->ops = &eeepc_hotplug_slot_ops; 562 eeepc_get_adapter_status(eeepc->hotplug_slot, 563 &eeepc->hotplug_slot->info->adapter_status); 564 565 ret = pci_hp_register(eeepc->hotplug_slot, bus, 0, "eeepc-wifi"); 566 if (ret) { 567 pr_err("Unable to register hotplug slot - %d\n", ret); 568 goto error_register; 569 } 570 571 return 0; 572 573 error_register: 574 kfree(eeepc->hotplug_slot->info); 575 error_info: 576 kfree(eeepc->hotplug_slot); 577 eeepc->hotplug_slot = NULL; 578 error_slot: 579 destroy_workqueue(eeepc->hotplug_workqueue); 580 error_workqueue: 581 return ret; 582 } 583 584 /* 585 * Rfkill devices 586 */ 587 static int eeepc_rfkill_set(void *data, bool blocked) 588 { 589 int dev_id = (unsigned long)data; 590 u32 ctrl_param = !blocked; 591 acpi_status status; 592 593 status = eeepc_wmi_set_devstate(dev_id, ctrl_param, NULL); 594 595 if (ACPI_FAILURE(status)) 596 return -EIO; 597 598 return 0; 599 } 600 601 static void eeepc_rfkill_query(struct rfkill *rfkill, void *data) 602 { 603 int dev_id = (unsigned long)data; 604 u32 retval; 605 acpi_status status; 606 607 status = eeepc_wmi_get_devstate(dev_id, &retval); 608 609 if (ACPI_FAILURE(status)) 610 return ; 611 612 rfkill_set_sw_state(rfkill, !(retval & 0x1)); 613 } 614 615 static int eeepc_rfkill_wlan_set(void *data, bool blocked) 616 { 617 struct eeepc_wmi *eeepc = data; 618 int ret; 619 620 /* 621 * This handler is enabled only if hotplug is enabled. 622 * In this case, the eeepc_wmi_set_devstate() will 623 * trigger a wmi notification and we need to wait 624 * this call to finish before being able to call 625 * any wmi method 626 */ 627 mutex_lock(&eeepc->wmi_lock); 628 ret = eeepc_rfkill_set((void *)(long)EEEPC_WMI_DEVID_WLAN, blocked); 629 mutex_unlock(&eeepc->wmi_lock); 630 return ret; 631 } 632 633 static void eeepc_rfkill_wlan_query(struct rfkill *rfkill, void *data) 634 { 635 eeepc_rfkill_query(rfkill, (void *)(long)EEEPC_WMI_DEVID_WLAN); 636 } 637 638 static const struct rfkill_ops eeepc_rfkill_wlan_ops = { 639 .set_block = eeepc_rfkill_wlan_set, 640 .query = eeepc_rfkill_wlan_query, 641 }; 642 643 static const struct rfkill_ops eeepc_rfkill_ops = { 644 .set_block = eeepc_rfkill_set, 645 .query = eeepc_rfkill_query, 646 }; 647 648 static int eeepc_new_rfkill(struct eeepc_wmi *eeepc, 649 struct rfkill **rfkill, 650 const char *name, 651 enum rfkill_type type, int dev_id) 652 { 653 int result; 654 u32 retval; 655 acpi_status status; 656 657 status = eeepc_wmi_get_devstate(dev_id, &retval); 658 659 if (ACPI_FAILURE(status)) 660 return -1; 661 662 /* If the device is present, DSTS will always set some bits 663 * 0x00070000 - 1110000000000000000 - device supported 664 * 0x00060000 - 1100000000000000000 - not supported 665 * 0x00020000 - 0100000000000000000 - device supported 666 * 0x00010000 - 0010000000000000000 - not supported / special mode ? 667 */ 668 if (!retval || retval == 0x00060000) 669 return -ENODEV; 670 671 if (dev_id == EEEPC_WMI_DEVID_WLAN && eeepc->hotplug_wireless) 672 *rfkill = rfkill_alloc(name, &eeepc->platform_device->dev, type, 673 &eeepc_rfkill_wlan_ops, eeepc); 674 else 675 *rfkill = rfkill_alloc(name, &eeepc->platform_device->dev, type, 676 &eeepc_rfkill_ops, (void *)(long)dev_id); 677 678 if (!*rfkill) 679 return -EINVAL; 680 681 rfkill_init_sw_state(*rfkill, !(retval & 0x1)); 682 result = rfkill_register(*rfkill); 683 if (result) { 684 rfkill_destroy(*rfkill); 685 *rfkill = NULL; 686 return result; 687 } 688 return 0; 689 } 690 691 static void eeepc_wmi_rfkill_exit(struct eeepc_wmi *eeepc) 692 { 693 eeepc_unregister_rfkill_notifier(eeepc, "\\_SB.PCI0.P0P5"); 694 eeepc_unregister_rfkill_notifier(eeepc, "\\_SB.PCI0.P0P6"); 695 eeepc_unregister_rfkill_notifier(eeepc, "\\_SB.PCI0.P0P7"); 696 if (eeepc->wlan_rfkill) { 697 rfkill_unregister(eeepc->wlan_rfkill); 698 rfkill_destroy(eeepc->wlan_rfkill); 699 eeepc->wlan_rfkill = NULL; 700 } 701 /* 702 * Refresh pci hotplug in case the rfkill state was changed after 703 * eeepc_unregister_rfkill_notifier() 704 */ 705 eeepc_rfkill_hotplug(eeepc); 706 if (eeepc->hotplug_slot) 707 pci_hp_deregister(eeepc->hotplug_slot); 708 if (eeepc->hotplug_workqueue) 709 destroy_workqueue(eeepc->hotplug_workqueue); 710 711 if (eeepc->bluetooth_rfkill) { 712 rfkill_unregister(eeepc->bluetooth_rfkill); 713 rfkill_destroy(eeepc->bluetooth_rfkill); 714 eeepc->bluetooth_rfkill = NULL; 715 } 716 if (eeepc->wwan3g_rfkill) { 717 rfkill_unregister(eeepc->wwan3g_rfkill); 718 rfkill_destroy(eeepc->wwan3g_rfkill); 719 eeepc->wwan3g_rfkill = NULL; 720 } 721 } 722 723 static int eeepc_wmi_rfkill_init(struct eeepc_wmi *eeepc) 724 { 725 int result = 0; 726 727 mutex_init(&eeepc->hotplug_lock); 728 mutex_init(&eeepc->wmi_lock); 729 730 result = eeepc_new_rfkill(eeepc, &eeepc->wlan_rfkill, 731 "eeepc-wlan", RFKILL_TYPE_WLAN, 732 EEEPC_WMI_DEVID_WLAN); 733 734 if (result && result != -ENODEV) 735 goto exit; 736 737 result = eeepc_new_rfkill(eeepc, &eeepc->bluetooth_rfkill, 738 "eeepc-bluetooth", RFKILL_TYPE_BLUETOOTH, 739 EEEPC_WMI_DEVID_BLUETOOTH); 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_brightness(struct backlight_device *bd) 782 { 783 u32 retval; 784 acpi_status status; 785 786 status = eeepc_wmi_get_devstate(EEEPC_WMI_DEVID_BACKLIGHT, &retval); 787 788 if (ACPI_FAILURE(status)) 789 return -1; 790 else 791 return retval & 0xFF; 792 } 793 794 static int update_bl_status(struct backlight_device *bd) 795 { 796 797 u32 ctrl_param; 798 acpi_status status; 799 800 ctrl_param = bd->props.brightness; 801 802 status = eeepc_wmi_set_devstate(EEEPC_WMI_DEVID_BACKLIGHT, 803 ctrl_param, NULL); 804 805 if (ACPI_FAILURE(status)) 806 return -1; 807 else 808 return 0; 809 } 810 811 static const struct backlight_ops eeepc_wmi_bl_ops = { 812 .get_brightness = read_brightness, 813 .update_status = update_bl_status, 814 }; 815 816 static int eeepc_wmi_backlight_notify(struct eeepc_wmi *eeepc, int code) 817 { 818 struct backlight_device *bd = eeepc->backlight_device; 819 int old = bd->props.brightness; 820 int new = old; 821 822 if (code >= NOTIFY_BRNUP_MIN && code <= NOTIFY_BRNUP_MAX) 823 new = code - NOTIFY_BRNUP_MIN + 1; 824 else if (code >= NOTIFY_BRNDOWN_MIN && code <= NOTIFY_BRNDOWN_MAX) 825 new = code - NOTIFY_BRNDOWN_MIN; 826 827 bd->props.brightness = new; 828 backlight_update_status(bd); 829 backlight_force_update(bd, BACKLIGHT_UPDATE_HOTKEY); 830 831 return old; 832 } 833 834 static int eeepc_wmi_backlight_init(struct eeepc_wmi *eeepc) 835 { 836 struct backlight_device *bd; 837 struct backlight_properties props; 838 839 memset(&props, 0, sizeof(struct backlight_properties)); 840 props.max_brightness = 15; 841 bd = backlight_device_register(EEEPC_WMI_FILE, 842 &eeepc->platform_device->dev, eeepc, 843 &eeepc_wmi_bl_ops, &props); 844 if (IS_ERR(bd)) { 845 pr_err("Could not register backlight device\n"); 846 return PTR_ERR(bd); 847 } 848 849 eeepc->backlight_device = bd; 850 851 bd->props.brightness = read_brightness(bd); 852 bd->props.power = FB_BLANK_UNBLANK; 853 backlight_update_status(bd); 854 855 return 0; 856 } 857 858 static void eeepc_wmi_backlight_exit(struct eeepc_wmi *eeepc) 859 { 860 if (eeepc->backlight_device) 861 backlight_device_unregister(eeepc->backlight_device); 862 863 eeepc->backlight_device = NULL; 864 } 865 866 static void eeepc_wmi_notify(u32 value, void *context) 867 { 868 struct eeepc_wmi *eeepc = context; 869 struct acpi_buffer response = { ACPI_ALLOCATE_BUFFER, NULL }; 870 union acpi_object *obj; 871 acpi_status status; 872 int code; 873 int orig_code; 874 875 status = wmi_get_event_data(value, &response); 876 if (status != AE_OK) { 877 pr_err("bad event status 0x%x\n", status); 878 return; 879 } 880 881 obj = (union acpi_object *)response.pointer; 882 883 if (obj && obj->type == ACPI_TYPE_INTEGER) { 884 code = obj->integer.value; 885 orig_code = code; 886 887 if (code >= NOTIFY_BRNUP_MIN && code <= NOTIFY_BRNUP_MAX) 888 code = NOTIFY_BRNUP_MIN; 889 else if (code >= NOTIFY_BRNDOWN_MIN && 890 code <= NOTIFY_BRNDOWN_MAX) 891 code = NOTIFY_BRNDOWN_MIN; 892 893 if (code == NOTIFY_BRNUP_MIN || code == NOTIFY_BRNDOWN_MIN) { 894 if (!acpi_video_backlight_support()) 895 eeepc_wmi_backlight_notify(eeepc, orig_code); 896 } 897 898 if (!sparse_keymap_report_event(eeepc->inputdev, 899 code, 1, true)) 900 pr_info("Unknown key %x pressed\n", code); 901 } 902 903 kfree(obj); 904 } 905 906 static ssize_t store_cpufv(struct device *dev, struct device_attribute *attr, 907 const char *buf, size_t count) 908 { 909 int value; 910 struct acpi_buffer input = { (acpi_size)sizeof(value), &value }; 911 acpi_status status; 912 913 if (!count || sscanf(buf, "%i", &value) != 1) 914 return -EINVAL; 915 if (value < 0 || value > 2) 916 return -EINVAL; 917 918 status = wmi_evaluate_method(EEEPC_WMI_MGMT_GUID, 919 1, EEEPC_WMI_METHODID_CFVS, &input, NULL); 920 921 if (ACPI_FAILURE(status)) 922 return -EIO; 923 else 924 return count; 925 } 926 927 static DEVICE_ATTR(cpufv, S_IRUGO | S_IWUSR, NULL, store_cpufv); 928 929 static struct attribute *platform_attributes[] = { 930 &dev_attr_cpufv.attr, 931 NULL 932 }; 933 934 static struct attribute_group platform_attribute_group = { 935 .attrs = platform_attributes 936 }; 937 938 static void eeepc_wmi_sysfs_exit(struct platform_device *device) 939 { 940 sysfs_remove_group(&device->dev.kobj, &platform_attribute_group); 941 } 942 943 static int eeepc_wmi_sysfs_init(struct platform_device *device) 944 { 945 return sysfs_create_group(&device->dev.kobj, &platform_attribute_group); 946 } 947 948 /* 949 * Platform device 950 */ 951 static int __init eeepc_wmi_platform_init(struct eeepc_wmi *eeepc) 952 { 953 int err; 954 955 eeepc->platform_device = platform_device_alloc(EEEPC_WMI_FILE, -1); 956 if (!eeepc->platform_device) 957 return -ENOMEM; 958 platform_set_drvdata(eeepc->platform_device, eeepc); 959 960 err = platform_device_add(eeepc->platform_device); 961 if (err) 962 goto fail_platform_device; 963 964 err = eeepc_wmi_sysfs_init(eeepc->platform_device); 965 if (err) 966 goto fail_sysfs; 967 return 0; 968 969 fail_sysfs: 970 platform_device_del(eeepc->platform_device); 971 fail_platform_device: 972 platform_device_put(eeepc->platform_device); 973 return err; 974 } 975 976 static void eeepc_wmi_platform_exit(struct eeepc_wmi *eeepc) 977 { 978 eeepc_wmi_sysfs_exit(eeepc->platform_device); 979 platform_device_unregister(eeepc->platform_device); 980 } 981 982 /* 983 * debugfs 984 */ 985 struct eeepc_wmi_debugfs_node { 986 struct eeepc_wmi *eeepc; 987 char *name; 988 int (*show)(struct seq_file *m, void *data); 989 }; 990 991 static int show_dsts(struct seq_file *m, void *data) 992 { 993 struct eeepc_wmi *eeepc = m->private; 994 acpi_status status; 995 u32 retval = -1; 996 997 status = eeepc_wmi_get_devstate(eeepc->debug.dev_id, &retval); 998 999 if (ACPI_FAILURE(status)) 1000 return -EIO; 1001 1002 seq_printf(m, "DSTS(%x) = %x\n", eeepc->debug.dev_id, retval); 1003 1004 return 0; 1005 } 1006 1007 static int show_devs(struct seq_file *m, void *data) 1008 { 1009 struct eeepc_wmi *eeepc = m->private; 1010 acpi_status status; 1011 u32 retval = -1; 1012 1013 status = eeepc_wmi_set_devstate(eeepc->debug.dev_id, 1014 eeepc->debug.ctrl_param, &retval); 1015 if (ACPI_FAILURE(status)) 1016 return -EIO; 1017 1018 seq_printf(m, "DEVS(%x, %x) = %x\n", eeepc->debug.dev_id, 1019 eeepc->debug.ctrl_param, retval); 1020 1021 return 0; 1022 } 1023 1024 static struct eeepc_wmi_debugfs_node eeepc_wmi_debug_files[] = { 1025 { NULL, "devs", show_devs }, 1026 { NULL, "dsts", show_dsts }, 1027 }; 1028 1029 static int eeepc_wmi_debugfs_open(struct inode *inode, struct file *file) 1030 { 1031 struct eeepc_wmi_debugfs_node *node = inode->i_private; 1032 1033 return single_open(file, node->show, node->eeepc); 1034 } 1035 1036 static const struct file_operations eeepc_wmi_debugfs_io_ops = { 1037 .owner = THIS_MODULE, 1038 .open = eeepc_wmi_debugfs_open, 1039 .read = seq_read, 1040 .llseek = seq_lseek, 1041 .release = single_release, 1042 }; 1043 1044 static void eeepc_wmi_debugfs_exit(struct eeepc_wmi *eeepc) 1045 { 1046 debugfs_remove_recursive(eeepc->debug.root); 1047 } 1048 1049 static int eeepc_wmi_debugfs_init(struct eeepc_wmi *eeepc) 1050 { 1051 struct dentry *dent; 1052 int i; 1053 1054 eeepc->debug.root = debugfs_create_dir(EEEPC_WMI_FILE, NULL); 1055 if (!eeepc->debug.root) { 1056 pr_err("failed to create debugfs directory"); 1057 goto error_debugfs; 1058 } 1059 1060 dent = debugfs_create_x32("dev_id", S_IRUGO|S_IWUSR, 1061 eeepc->debug.root, &eeepc->debug.dev_id); 1062 if (!dent) 1063 goto error_debugfs; 1064 1065 dent = debugfs_create_x32("ctrl_param", S_IRUGO|S_IWUSR, 1066 eeepc->debug.root, &eeepc->debug.ctrl_param); 1067 if (!dent) 1068 goto error_debugfs; 1069 1070 for (i = 0; i < ARRAY_SIZE(eeepc_wmi_debug_files); i++) { 1071 struct eeepc_wmi_debugfs_node *node = &eeepc_wmi_debug_files[i]; 1072 1073 node->eeepc = eeepc; 1074 dent = debugfs_create_file(node->name, S_IFREG | S_IRUGO, 1075 eeepc->debug.root, node, 1076 &eeepc_wmi_debugfs_io_ops); 1077 if (!dent) { 1078 pr_err("failed to create debug file: %s\n", node->name); 1079 goto error_debugfs; 1080 } 1081 } 1082 1083 return 0; 1084 1085 error_debugfs: 1086 eeepc_wmi_debugfs_exit(eeepc); 1087 return -ENOMEM; 1088 } 1089 1090 /* 1091 * WMI Driver 1092 */ 1093 static void eeepc_dmi_check(struct eeepc_wmi *eeepc) 1094 { 1095 const char *model; 1096 1097 model = dmi_get_system_info(DMI_PRODUCT_NAME); 1098 if (!model) 1099 return; 1100 1101 /* 1102 * Whitelist for wlan hotplug 1103 * 1104 * Eeepc 1000H needs the current hotplug code to handle 1105 * Fn+F2 correctly. We may add other Eeepc here later, but 1106 * it seems that most of the laptops supported by eeepc-wmi 1107 * don't need to be on this list 1108 */ 1109 if (strcmp(model, "1000H") == 0) { 1110 eeepc->hotplug_wireless = true; 1111 pr_info("wlan hotplug enabled\n"); 1112 } 1113 } 1114 1115 static struct platform_device * __init eeepc_wmi_add(void) 1116 { 1117 struct eeepc_wmi *eeepc; 1118 acpi_status status; 1119 int err; 1120 1121 eeepc = kzalloc(sizeof(struct eeepc_wmi), GFP_KERNEL); 1122 if (!eeepc) 1123 return ERR_PTR(-ENOMEM); 1124 1125 eeepc->hotplug_wireless = hotplug_wireless; 1126 eeepc_dmi_check(eeepc); 1127 1128 /* 1129 * Register the platform device first. It is used as a parent for the 1130 * sub-devices below. 1131 */ 1132 err = eeepc_wmi_platform_init(eeepc); 1133 if (err) 1134 goto fail_platform; 1135 1136 err = eeepc_wmi_input_init(eeepc); 1137 if (err) 1138 goto fail_input; 1139 1140 err = eeepc_wmi_led_init(eeepc); 1141 if (err) 1142 goto fail_leds; 1143 1144 err = eeepc_wmi_rfkill_init(eeepc); 1145 if (err) 1146 goto fail_rfkill; 1147 1148 if (!acpi_video_backlight_support()) { 1149 err = eeepc_wmi_backlight_init(eeepc); 1150 if (err) 1151 goto fail_backlight; 1152 } else 1153 pr_info("Backlight controlled by ACPI video driver\n"); 1154 1155 status = wmi_install_notify_handler(EEEPC_WMI_EVENT_GUID, 1156 eeepc_wmi_notify, eeepc); 1157 if (ACPI_FAILURE(status)) { 1158 pr_err("Unable to register notify handler - %d\n", 1159 status); 1160 err = -ENODEV; 1161 goto fail_wmi_handler; 1162 } 1163 1164 err = eeepc_wmi_debugfs_init(eeepc); 1165 if (err) 1166 goto fail_debugfs; 1167 1168 return eeepc->platform_device; 1169 1170 fail_debugfs: 1171 wmi_remove_notify_handler(EEEPC_WMI_EVENT_GUID); 1172 fail_wmi_handler: 1173 eeepc_wmi_backlight_exit(eeepc); 1174 fail_backlight: 1175 eeepc_wmi_rfkill_exit(eeepc); 1176 fail_rfkill: 1177 eeepc_wmi_led_exit(eeepc); 1178 fail_leds: 1179 eeepc_wmi_input_exit(eeepc); 1180 fail_input: 1181 eeepc_wmi_platform_exit(eeepc); 1182 fail_platform: 1183 kfree(eeepc); 1184 return ERR_PTR(err); 1185 } 1186 1187 static int eeepc_wmi_remove(struct platform_device *device) 1188 { 1189 struct eeepc_wmi *eeepc; 1190 1191 eeepc = platform_get_drvdata(device); 1192 wmi_remove_notify_handler(EEEPC_WMI_EVENT_GUID); 1193 eeepc_wmi_backlight_exit(eeepc); 1194 eeepc_wmi_input_exit(eeepc); 1195 eeepc_wmi_led_exit(eeepc); 1196 eeepc_wmi_rfkill_exit(eeepc); 1197 eeepc_wmi_debugfs_exit(eeepc); 1198 eeepc_wmi_platform_exit(eeepc); 1199 1200 kfree(eeepc); 1201 return 0; 1202 } 1203 1204 static struct platform_driver platform_driver = { 1205 .driver = { 1206 .name = EEEPC_WMI_FILE, 1207 .owner = THIS_MODULE, 1208 }, 1209 }; 1210 1211 static acpi_status __init eeepc_wmi_parse_device(acpi_handle handle, u32 level, 1212 void *context, void **retval) 1213 { 1214 pr_warning("Found legacy ATKD device (%s)", EEEPC_ACPI_HID); 1215 *(bool *)context = true; 1216 return AE_CTRL_TERMINATE; 1217 } 1218 1219 static int __init eeepc_wmi_check_atkd(void) 1220 { 1221 acpi_status status; 1222 bool found = false; 1223 1224 status = acpi_get_devices(EEEPC_ACPI_HID, eeepc_wmi_parse_device, 1225 &found, NULL); 1226 1227 if (ACPI_FAILURE(status) || !found) 1228 return 0; 1229 return -1; 1230 } 1231 1232 static int __init eeepc_wmi_init(void) 1233 { 1234 int err; 1235 1236 if (!wmi_has_guid(EEEPC_WMI_EVENT_GUID) || 1237 !wmi_has_guid(EEEPC_WMI_MGMT_GUID)) { 1238 pr_warning("No known WMI GUID found\n"); 1239 return -ENODEV; 1240 } 1241 1242 if (eeepc_wmi_check_atkd()) { 1243 pr_warning("WMI device present, but legacy ATKD device is also " 1244 "present and enabled."); 1245 pr_warning("You probably booted with acpi_osi=\"Linux\" or " 1246 "acpi_osi=\"!Windows 2009\""); 1247 pr_warning("Can't load eeepc-wmi, use default acpi_osi " 1248 "(preferred) or eeepc-laptop"); 1249 return -ENODEV; 1250 } 1251 1252 platform_device = eeepc_wmi_add(); 1253 if (IS_ERR(platform_device)) { 1254 err = PTR_ERR(platform_device); 1255 goto fail_eeepc_wmi; 1256 } 1257 1258 err = platform_driver_register(&platform_driver); 1259 if (err) { 1260 pr_warning("Unable to register platform driver\n"); 1261 goto fail_platform_driver; 1262 } 1263 1264 return 0; 1265 1266 fail_platform_driver: 1267 eeepc_wmi_remove(platform_device); 1268 fail_eeepc_wmi: 1269 return err; 1270 } 1271 1272 static void __exit eeepc_wmi_exit(void) 1273 { 1274 eeepc_wmi_remove(platform_device); 1275 platform_driver_unregister(&platform_driver); 1276 } 1277 1278 module_init(eeepc_wmi_init); 1279 module_exit(eeepc_wmi_exit); 1280