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