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 static int eeepc_wmi_input_init(struct eeepc_wmi *eeepc) 148 { 149 int err; 150 151 eeepc->inputdev = input_allocate_device(); 152 if (!eeepc->inputdev) 153 return -ENOMEM; 154 155 eeepc->inputdev->name = "Eee PC WMI hotkeys"; 156 eeepc->inputdev->phys = EEEPC_WMI_FILE "/input0"; 157 eeepc->inputdev->id.bustype = BUS_HOST; 158 eeepc->inputdev->dev.parent = &eeepc->platform_device->dev; 159 160 err = sparse_keymap_setup(eeepc->inputdev, eeepc_wmi_keymap, NULL); 161 if (err) 162 goto err_free_dev; 163 164 err = input_register_device(eeepc->inputdev); 165 if (err) 166 goto err_free_keymap; 167 168 return 0; 169 170 err_free_keymap: 171 sparse_keymap_free(eeepc->inputdev); 172 err_free_dev: 173 input_free_device(eeepc->inputdev); 174 return err; 175 } 176 177 static void eeepc_wmi_input_exit(struct eeepc_wmi *eeepc) 178 { 179 if (eeepc->inputdev) { 180 sparse_keymap_free(eeepc->inputdev); 181 input_unregister_device(eeepc->inputdev); 182 } 183 184 eeepc->inputdev = NULL; 185 } 186 187 static acpi_status eeepc_wmi_get_devstate(u32 dev_id, u32 *retval) 188 { 189 struct acpi_buffer input = { (acpi_size)sizeof(u32), &dev_id }; 190 struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL }; 191 union acpi_object *obj; 192 acpi_status status; 193 u32 tmp; 194 195 status = wmi_evaluate_method(EEEPC_WMI_MGMT_GUID, 196 1, EEEPC_WMI_METHODID_DSTS, 197 &input, &output); 198 199 if (ACPI_FAILURE(status)) 200 return status; 201 202 obj = (union acpi_object *)output.pointer; 203 if (obj && obj->type == ACPI_TYPE_INTEGER) 204 tmp = (u32)obj->integer.value; 205 else 206 tmp = 0; 207 208 if (retval) 209 *retval = tmp; 210 211 kfree(obj); 212 213 return status; 214 215 } 216 217 static acpi_status eeepc_wmi_set_devstate(u32 dev_id, u32 ctrl_param, 218 u32 *retval) 219 { 220 struct bios_args args = { 221 .dev_id = dev_id, 222 .ctrl_param = ctrl_param, 223 }; 224 struct acpi_buffer input = { (acpi_size)sizeof(args), &args }; 225 acpi_status status; 226 227 if (!retval) { 228 status = wmi_evaluate_method(EEEPC_WMI_MGMT_GUID, 1, 229 EEEPC_WMI_METHODID_DEVS, 230 &input, NULL); 231 } else { 232 struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL }; 233 union acpi_object *obj; 234 u32 tmp; 235 236 status = wmi_evaluate_method(EEEPC_WMI_MGMT_GUID, 1, 237 EEEPC_WMI_METHODID_DEVS, 238 &input, &output); 239 240 if (ACPI_FAILURE(status)) 241 return status; 242 243 obj = (union acpi_object *)output.pointer; 244 if (obj && obj->type == ACPI_TYPE_INTEGER) 245 tmp = (u32)obj->integer.value; 246 else 247 tmp = 0; 248 249 *retval = tmp; 250 251 kfree(obj); 252 } 253 254 return status; 255 } 256 257 /* Helper for special devices with magic return codes */ 258 static int eeepc_wmi_get_devstate_simple(u32 dev_id) 259 { 260 u32 retval = 0; 261 acpi_status status; 262 263 status = eeepc_wmi_get_devstate(dev_id, &retval); 264 265 if (ACPI_FAILURE(status)) 266 return -EINVAL; 267 268 /* If the device is present, DSTS will always set some bits 269 * 0x00070000 - 1110000000000000000 - device supported 270 * 0x00060000 - 1100000000000000000 - not supported 271 * 0x00020000 - 0100000000000000000 - device supported 272 * 0x00010000 - 0010000000000000000 - not supported / special mode ? 273 */ 274 if (!retval || retval == 0x00060000) 275 return -ENODEV; 276 277 return retval & 0x1; 278 } 279 280 /* 281 * LEDs 282 */ 283 /* 284 * These functions actually update the LED's, and are called from a 285 * workqueue. By doing this as separate work rather than when the LED 286 * subsystem asks, we avoid messing with the Eeepc ACPI stuff during a 287 * potentially bad time, such as a timer interrupt. 288 */ 289 static void tpd_led_update(struct work_struct *work) 290 { 291 int ctrl_param; 292 struct eeepc_wmi *eeepc; 293 294 eeepc = container_of(work, struct eeepc_wmi, tpd_led_work); 295 296 ctrl_param = eeepc->tpd_led_wk; 297 eeepc_wmi_set_devstate(EEEPC_WMI_DEVID_TPDLED, ctrl_param, NULL); 298 } 299 300 static void tpd_led_set(struct led_classdev *led_cdev, 301 enum led_brightness value) 302 { 303 struct eeepc_wmi *eeepc; 304 305 eeepc = container_of(led_cdev, struct eeepc_wmi, tpd_led); 306 307 eeepc->tpd_led_wk = !!value; 308 queue_work(eeepc->led_workqueue, &eeepc->tpd_led_work); 309 } 310 311 static int read_tpd_state(struct eeepc_wmi *eeepc) 312 { 313 return eeepc_wmi_get_devstate_simple(EEEPC_WMI_DEVID_TPDLED); 314 } 315 316 static enum led_brightness tpd_led_get(struct led_classdev *led_cdev) 317 { 318 struct eeepc_wmi *eeepc; 319 320 eeepc = container_of(led_cdev, struct eeepc_wmi, tpd_led); 321 322 return read_tpd_state(eeepc); 323 } 324 325 static int eeepc_wmi_led_init(struct eeepc_wmi *eeepc) 326 { 327 int rv; 328 329 if (read_tpd_state(eeepc) < 0) 330 return 0; 331 332 eeepc->led_workqueue = create_singlethread_workqueue("led_workqueue"); 333 if (!eeepc->led_workqueue) 334 return -ENOMEM; 335 INIT_WORK(&eeepc->tpd_led_work, tpd_led_update); 336 337 eeepc->tpd_led.name = "eeepc::touchpad"; 338 eeepc->tpd_led.brightness_set = tpd_led_set; 339 eeepc->tpd_led.brightness_get = tpd_led_get; 340 eeepc->tpd_led.max_brightness = 1; 341 342 rv = led_classdev_register(&eeepc->platform_device->dev, 343 &eeepc->tpd_led); 344 if (rv) { 345 destroy_workqueue(eeepc->led_workqueue); 346 return rv; 347 } 348 349 return 0; 350 } 351 352 static void eeepc_wmi_led_exit(struct eeepc_wmi *eeepc) 353 { 354 if (eeepc->tpd_led.dev) 355 led_classdev_unregister(&eeepc->tpd_led); 356 if (eeepc->led_workqueue) 357 destroy_workqueue(eeepc->led_workqueue); 358 } 359 360 /* 361 * PCI hotplug (for wlan rfkill) 362 */ 363 static bool eeepc_wlan_rfkill_blocked(struct eeepc_wmi *eeepc) 364 { 365 int result = eeepc_wmi_get_devstate_simple(EEEPC_WMI_DEVID_WLAN); 366 367 if (result < 0) 368 return false; 369 return !result; 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 int result = eeepc_wmi_get_devstate_simple(EEEPC_WMI_DEVID_WLAN); 498 499 if (result < 0) 500 return result; 501 502 *value = !!result; 503 return 0; 504 } 505 506 static void eeepc_cleanup_pci_hotplug(struct hotplug_slot *hotplug_slot) 507 { 508 kfree(hotplug_slot->info); 509 kfree(hotplug_slot); 510 } 511 512 static struct hotplug_slot_ops eeepc_hotplug_slot_ops = { 513 .owner = THIS_MODULE, 514 .get_adapter_status = eeepc_get_adapter_status, 515 .get_power_status = eeepc_get_adapter_status, 516 }; 517 518 static void eeepc_hotplug_work(struct work_struct *work) 519 { 520 struct eeepc_wmi *eeepc; 521 522 eeepc = container_of(work, struct eeepc_wmi, hotplug_work); 523 eeepc_rfkill_hotplug(eeepc); 524 } 525 526 static int eeepc_setup_pci_hotplug(struct eeepc_wmi *eeepc) 527 { 528 int ret = -ENOMEM; 529 struct pci_bus *bus = pci_find_bus(0, 1); 530 531 if (!bus) { 532 pr_err("Unable to find wifi PCI bus\n"); 533 return -ENODEV; 534 } 535 536 eeepc->hotplug_workqueue = 537 create_singlethread_workqueue("hotplug_workqueue"); 538 if (!eeepc->hotplug_workqueue) 539 goto error_workqueue; 540 541 INIT_WORK(&eeepc->hotplug_work, eeepc_hotplug_work); 542 543 eeepc->hotplug_slot = kzalloc(sizeof(struct hotplug_slot), GFP_KERNEL); 544 if (!eeepc->hotplug_slot) 545 goto error_slot; 546 547 eeepc->hotplug_slot->info = kzalloc(sizeof(struct hotplug_slot_info), 548 GFP_KERNEL); 549 if (!eeepc->hotplug_slot->info) 550 goto error_info; 551 552 eeepc->hotplug_slot->private = eeepc; 553 eeepc->hotplug_slot->release = &eeepc_cleanup_pci_hotplug; 554 eeepc->hotplug_slot->ops = &eeepc_hotplug_slot_ops; 555 eeepc_get_adapter_status(eeepc->hotplug_slot, 556 &eeepc->hotplug_slot->info->adapter_status); 557 558 ret = pci_hp_register(eeepc->hotplug_slot, bus, 0, "eeepc-wifi"); 559 if (ret) { 560 pr_err("Unable to register hotplug slot - %d\n", ret); 561 goto error_register; 562 } 563 564 return 0; 565 566 error_register: 567 kfree(eeepc->hotplug_slot->info); 568 error_info: 569 kfree(eeepc->hotplug_slot); 570 eeepc->hotplug_slot = NULL; 571 error_slot: 572 destroy_workqueue(eeepc->hotplug_workqueue); 573 error_workqueue: 574 return ret; 575 } 576 577 /* 578 * Rfkill devices 579 */ 580 static int eeepc_rfkill_set(void *data, bool blocked) 581 { 582 int dev_id = (unsigned long)data; 583 u32 ctrl_param = !blocked; 584 acpi_status status; 585 586 status = eeepc_wmi_set_devstate(dev_id, ctrl_param, NULL); 587 588 if (ACPI_FAILURE(status)) 589 return -EIO; 590 591 return 0; 592 } 593 594 static void eeepc_rfkill_query(struct rfkill *rfkill, void *data) 595 { 596 int dev_id = (unsigned long)data; 597 int result; 598 599 result = eeepc_wmi_get_devstate_simple(dev_id); 600 601 if (result < 0) 602 return ; 603 604 rfkill_set_sw_state(rfkill, !result); 605 } 606 607 static int eeepc_rfkill_wlan_set(void *data, bool blocked) 608 { 609 struct eeepc_wmi *eeepc = data; 610 int ret; 611 612 /* 613 * This handler is enabled only if hotplug is enabled. 614 * In this case, the eeepc_wmi_set_devstate() will 615 * trigger a wmi notification and we need to wait 616 * this call to finish before being able to call 617 * any wmi method 618 */ 619 mutex_lock(&eeepc->wmi_lock); 620 ret = eeepc_rfkill_set((void *)(long)EEEPC_WMI_DEVID_WLAN, blocked); 621 mutex_unlock(&eeepc->wmi_lock); 622 return ret; 623 } 624 625 static void eeepc_rfkill_wlan_query(struct rfkill *rfkill, void *data) 626 { 627 eeepc_rfkill_query(rfkill, (void *)(long)EEEPC_WMI_DEVID_WLAN); 628 } 629 630 static const struct rfkill_ops eeepc_rfkill_wlan_ops = { 631 .set_block = eeepc_rfkill_wlan_set, 632 .query = eeepc_rfkill_wlan_query, 633 }; 634 635 static const struct rfkill_ops eeepc_rfkill_ops = { 636 .set_block = eeepc_rfkill_set, 637 .query = eeepc_rfkill_query, 638 }; 639 640 static int eeepc_new_rfkill(struct eeepc_wmi *eeepc, 641 struct rfkill **rfkill, 642 const char *name, 643 enum rfkill_type type, int dev_id) 644 { 645 int result = eeepc_wmi_get_devstate_simple(dev_id); 646 647 if (result < 0) 648 return result; 649 650 if (dev_id == EEEPC_WMI_DEVID_WLAN && eeepc->hotplug_wireless) 651 *rfkill = rfkill_alloc(name, &eeepc->platform_device->dev, type, 652 &eeepc_rfkill_wlan_ops, eeepc); 653 else 654 *rfkill = rfkill_alloc(name, &eeepc->platform_device->dev, type, 655 &eeepc_rfkill_ops, (void *)(long)dev_id); 656 657 if (!*rfkill) 658 return -EINVAL; 659 660 rfkill_init_sw_state(*rfkill, !result); 661 result = rfkill_register(*rfkill); 662 if (result) { 663 rfkill_destroy(*rfkill); 664 *rfkill = NULL; 665 return result; 666 } 667 return 0; 668 } 669 670 static void eeepc_wmi_rfkill_exit(struct eeepc_wmi *eeepc) 671 { 672 eeepc_unregister_rfkill_notifier(eeepc, "\\_SB.PCI0.P0P5"); 673 eeepc_unregister_rfkill_notifier(eeepc, "\\_SB.PCI0.P0P6"); 674 eeepc_unregister_rfkill_notifier(eeepc, "\\_SB.PCI0.P0P7"); 675 if (eeepc->wlan_rfkill) { 676 rfkill_unregister(eeepc->wlan_rfkill); 677 rfkill_destroy(eeepc->wlan_rfkill); 678 eeepc->wlan_rfkill = NULL; 679 } 680 /* 681 * Refresh pci hotplug in case the rfkill state was changed after 682 * eeepc_unregister_rfkill_notifier() 683 */ 684 eeepc_rfkill_hotplug(eeepc); 685 if (eeepc->hotplug_slot) 686 pci_hp_deregister(eeepc->hotplug_slot); 687 if (eeepc->hotplug_workqueue) 688 destroy_workqueue(eeepc->hotplug_workqueue); 689 690 if (eeepc->bluetooth_rfkill) { 691 rfkill_unregister(eeepc->bluetooth_rfkill); 692 rfkill_destroy(eeepc->bluetooth_rfkill); 693 eeepc->bluetooth_rfkill = NULL; 694 } 695 if (eeepc->wwan3g_rfkill) { 696 rfkill_unregister(eeepc->wwan3g_rfkill); 697 rfkill_destroy(eeepc->wwan3g_rfkill); 698 eeepc->wwan3g_rfkill = NULL; 699 } 700 } 701 702 static int eeepc_wmi_rfkill_init(struct eeepc_wmi *eeepc) 703 { 704 int result = 0; 705 706 mutex_init(&eeepc->hotplug_lock); 707 mutex_init(&eeepc->wmi_lock); 708 709 result = eeepc_new_rfkill(eeepc, &eeepc->wlan_rfkill, 710 "eeepc-wlan", RFKILL_TYPE_WLAN, 711 EEEPC_WMI_DEVID_WLAN); 712 713 if (result && result != -ENODEV) 714 goto exit; 715 716 result = eeepc_new_rfkill(eeepc, &eeepc->bluetooth_rfkill, 717 "eeepc-bluetooth", RFKILL_TYPE_BLUETOOTH, 718 EEEPC_WMI_DEVID_BLUETOOTH); 719 720 if (result && result != -ENODEV) 721 goto exit; 722 723 result = eeepc_new_rfkill(eeepc, &eeepc->wwan3g_rfkill, 724 "eeepc-wwan3g", RFKILL_TYPE_WWAN, 725 EEEPC_WMI_DEVID_WWAN3G); 726 727 if (result && result != -ENODEV) 728 goto exit; 729 730 result = eeepc_setup_pci_hotplug(eeepc); 731 /* 732 * If we get -EBUSY then something else is handling the PCI hotplug - 733 * don't fail in this case 734 */ 735 if (result == -EBUSY) 736 result = 0; 737 738 eeepc_register_rfkill_notifier(eeepc, "\\_SB.PCI0.P0P5"); 739 eeepc_register_rfkill_notifier(eeepc, "\\_SB.PCI0.P0P6"); 740 eeepc_register_rfkill_notifier(eeepc, "\\_SB.PCI0.P0P7"); 741 /* 742 * Refresh pci hotplug in case the rfkill state was changed during 743 * setup. 744 */ 745 eeepc_rfkill_hotplug(eeepc); 746 747 exit: 748 if (result && result != -ENODEV) 749 eeepc_wmi_rfkill_exit(eeepc); 750 751 if (result == -ENODEV) 752 result = 0; 753 754 return result; 755 } 756 757 /* 758 * Backlight 759 */ 760 static int read_brightness(struct backlight_device *bd) 761 { 762 u32 retval; 763 acpi_status status; 764 765 status = eeepc_wmi_get_devstate(EEEPC_WMI_DEVID_BACKLIGHT, &retval); 766 767 if (ACPI_FAILURE(status)) 768 return -1; 769 else 770 return retval & 0xFF; 771 } 772 773 static int update_bl_status(struct backlight_device *bd) 774 { 775 776 u32 ctrl_param; 777 acpi_status status; 778 779 ctrl_param = bd->props.brightness; 780 781 status = eeepc_wmi_set_devstate(EEEPC_WMI_DEVID_BACKLIGHT, 782 ctrl_param, NULL); 783 784 if (ACPI_FAILURE(status)) 785 return -1; 786 else 787 return 0; 788 } 789 790 static const struct backlight_ops eeepc_wmi_bl_ops = { 791 .get_brightness = read_brightness, 792 .update_status = update_bl_status, 793 }; 794 795 static int eeepc_wmi_backlight_notify(struct eeepc_wmi *eeepc, int code) 796 { 797 struct backlight_device *bd = eeepc->backlight_device; 798 int old = bd->props.brightness; 799 int new = old; 800 801 if (code >= NOTIFY_BRNUP_MIN && code <= NOTIFY_BRNUP_MAX) 802 new = code - NOTIFY_BRNUP_MIN + 1; 803 else if (code >= NOTIFY_BRNDOWN_MIN && code <= NOTIFY_BRNDOWN_MAX) 804 new = code - NOTIFY_BRNDOWN_MIN; 805 806 bd->props.brightness = new; 807 backlight_update_status(bd); 808 backlight_force_update(bd, BACKLIGHT_UPDATE_HOTKEY); 809 810 return old; 811 } 812 813 static int eeepc_wmi_backlight_init(struct eeepc_wmi *eeepc) 814 { 815 struct backlight_device *bd; 816 struct backlight_properties props; 817 818 memset(&props, 0, sizeof(struct backlight_properties)); 819 props.max_brightness = 15; 820 bd = backlight_device_register(EEEPC_WMI_FILE, 821 &eeepc->platform_device->dev, eeepc, 822 &eeepc_wmi_bl_ops, &props); 823 if (IS_ERR(bd)) { 824 pr_err("Could not register backlight device\n"); 825 return PTR_ERR(bd); 826 } 827 828 eeepc->backlight_device = bd; 829 830 bd->props.brightness = read_brightness(bd); 831 bd->props.power = FB_BLANK_UNBLANK; 832 backlight_update_status(bd); 833 834 return 0; 835 } 836 837 static void eeepc_wmi_backlight_exit(struct eeepc_wmi *eeepc) 838 { 839 if (eeepc->backlight_device) 840 backlight_device_unregister(eeepc->backlight_device); 841 842 eeepc->backlight_device = NULL; 843 } 844 845 static void eeepc_wmi_notify(u32 value, void *context) 846 { 847 struct eeepc_wmi *eeepc = context; 848 struct acpi_buffer response = { ACPI_ALLOCATE_BUFFER, NULL }; 849 union acpi_object *obj; 850 acpi_status status; 851 int code; 852 int orig_code; 853 854 status = wmi_get_event_data(value, &response); 855 if (status != AE_OK) { 856 pr_err("bad event status 0x%x\n", status); 857 return; 858 } 859 860 obj = (union acpi_object *)response.pointer; 861 862 if (obj && obj->type == ACPI_TYPE_INTEGER) { 863 code = obj->integer.value; 864 orig_code = code; 865 866 if (code >= NOTIFY_BRNUP_MIN && code <= NOTIFY_BRNUP_MAX) 867 code = NOTIFY_BRNUP_MIN; 868 else if (code >= NOTIFY_BRNDOWN_MIN && 869 code <= NOTIFY_BRNDOWN_MAX) 870 code = NOTIFY_BRNDOWN_MIN; 871 872 if (code == NOTIFY_BRNUP_MIN || code == NOTIFY_BRNDOWN_MIN) { 873 if (!acpi_video_backlight_support()) 874 eeepc_wmi_backlight_notify(eeepc, orig_code); 875 } 876 877 if (!sparse_keymap_report_event(eeepc->inputdev, 878 code, 1, true)) 879 pr_info("Unknown key %x pressed\n", code); 880 } 881 882 kfree(obj); 883 } 884 885 static ssize_t store_cpufv(struct device *dev, struct device_attribute *attr, 886 const char *buf, size_t count) 887 { 888 int value; 889 struct acpi_buffer input = { (acpi_size)sizeof(value), &value }; 890 acpi_status status; 891 892 if (!count || sscanf(buf, "%i", &value) != 1) 893 return -EINVAL; 894 if (value < 0 || value > 2) 895 return -EINVAL; 896 897 status = wmi_evaluate_method(EEEPC_WMI_MGMT_GUID, 898 1, EEEPC_WMI_METHODID_CFVS, &input, NULL); 899 900 if (ACPI_FAILURE(status)) 901 return -EIO; 902 else 903 return count; 904 } 905 906 static DEVICE_ATTR(cpufv, S_IRUGO | S_IWUSR, NULL, store_cpufv); 907 908 static struct attribute *platform_attributes[] = { 909 &dev_attr_cpufv.attr, 910 NULL 911 }; 912 913 static struct attribute_group platform_attribute_group = { 914 .attrs = platform_attributes 915 }; 916 917 static void eeepc_wmi_sysfs_exit(struct platform_device *device) 918 { 919 sysfs_remove_group(&device->dev.kobj, &platform_attribute_group); 920 } 921 922 static int eeepc_wmi_sysfs_init(struct platform_device *device) 923 { 924 return sysfs_create_group(&device->dev.kobj, &platform_attribute_group); 925 } 926 927 /* 928 * Platform device 929 */ 930 static int __init eeepc_wmi_platform_init(struct eeepc_wmi *eeepc) 931 { 932 return eeepc_wmi_sysfs_init(eeepc->platform_device); 933 } 934 935 static void eeepc_wmi_platform_exit(struct eeepc_wmi *eeepc) 936 { 937 eeepc_wmi_sysfs_exit(eeepc->platform_device); 938 } 939 940 /* 941 * debugfs 942 */ 943 struct eeepc_wmi_debugfs_node { 944 struct eeepc_wmi *eeepc; 945 char *name; 946 int (*show)(struct seq_file *m, void *data); 947 }; 948 949 static int show_dsts(struct seq_file *m, void *data) 950 { 951 struct eeepc_wmi *eeepc = m->private; 952 acpi_status status; 953 u32 retval = -1; 954 955 status = eeepc_wmi_get_devstate(eeepc->debug.dev_id, &retval); 956 957 if (ACPI_FAILURE(status)) 958 return -EIO; 959 960 seq_printf(m, "DSTS(%x) = %x\n", eeepc->debug.dev_id, retval); 961 962 return 0; 963 } 964 965 static int show_devs(struct seq_file *m, void *data) 966 { 967 struct eeepc_wmi *eeepc = m->private; 968 acpi_status status; 969 u32 retval = -1; 970 971 status = eeepc_wmi_set_devstate(eeepc->debug.dev_id, 972 eeepc->debug.ctrl_param, &retval); 973 if (ACPI_FAILURE(status)) 974 return -EIO; 975 976 seq_printf(m, "DEVS(%x, %x) = %x\n", eeepc->debug.dev_id, 977 eeepc->debug.ctrl_param, retval); 978 979 return 0; 980 } 981 982 static struct eeepc_wmi_debugfs_node eeepc_wmi_debug_files[] = { 983 { NULL, "devs", show_devs }, 984 { NULL, "dsts", show_dsts }, 985 }; 986 987 static int eeepc_wmi_debugfs_open(struct inode *inode, struct file *file) 988 { 989 struct eeepc_wmi_debugfs_node *node = inode->i_private; 990 991 return single_open(file, node->show, node->eeepc); 992 } 993 994 static const struct file_operations eeepc_wmi_debugfs_io_ops = { 995 .owner = THIS_MODULE, 996 .open = eeepc_wmi_debugfs_open, 997 .read = seq_read, 998 .llseek = seq_lseek, 999 .release = single_release, 1000 }; 1001 1002 static void eeepc_wmi_debugfs_exit(struct eeepc_wmi *eeepc) 1003 { 1004 debugfs_remove_recursive(eeepc->debug.root); 1005 } 1006 1007 static int eeepc_wmi_debugfs_init(struct eeepc_wmi *eeepc) 1008 { 1009 struct dentry *dent; 1010 int i; 1011 1012 eeepc->debug.root = debugfs_create_dir(EEEPC_WMI_FILE, NULL); 1013 if (!eeepc->debug.root) { 1014 pr_err("failed to create debugfs directory"); 1015 goto error_debugfs; 1016 } 1017 1018 dent = debugfs_create_x32("dev_id", S_IRUGO|S_IWUSR, 1019 eeepc->debug.root, &eeepc->debug.dev_id); 1020 if (!dent) 1021 goto error_debugfs; 1022 1023 dent = debugfs_create_x32("ctrl_param", S_IRUGO|S_IWUSR, 1024 eeepc->debug.root, &eeepc->debug.ctrl_param); 1025 if (!dent) 1026 goto error_debugfs; 1027 1028 for (i = 0; i < ARRAY_SIZE(eeepc_wmi_debug_files); i++) { 1029 struct eeepc_wmi_debugfs_node *node = &eeepc_wmi_debug_files[i]; 1030 1031 node->eeepc = eeepc; 1032 dent = debugfs_create_file(node->name, S_IFREG | S_IRUGO, 1033 eeepc->debug.root, node, 1034 &eeepc_wmi_debugfs_io_ops); 1035 if (!dent) { 1036 pr_err("failed to create debug file: %s\n", node->name); 1037 goto error_debugfs; 1038 } 1039 } 1040 1041 return 0; 1042 1043 error_debugfs: 1044 eeepc_wmi_debugfs_exit(eeepc); 1045 return -ENOMEM; 1046 } 1047 1048 /* 1049 * WMI Driver 1050 */ 1051 static void eeepc_dmi_check(struct eeepc_wmi *eeepc) 1052 { 1053 const char *model; 1054 1055 model = dmi_get_system_info(DMI_PRODUCT_NAME); 1056 if (!model) 1057 return; 1058 1059 /* 1060 * Whitelist for wlan hotplug 1061 * 1062 * Eeepc 1000H needs the current hotplug code to handle 1063 * Fn+F2 correctly. We may add other Eeepc here later, but 1064 * it seems that most of the laptops supported by eeepc-wmi 1065 * don't need to be on this list 1066 */ 1067 if (strcmp(model, "1000H") == 0) { 1068 eeepc->hotplug_wireless = true; 1069 pr_info("wlan hotplug enabled\n"); 1070 } 1071 } 1072 1073 static int __init eeepc_wmi_add(struct platform_device *pdev) 1074 { 1075 struct eeepc_wmi *eeepc; 1076 acpi_status status; 1077 int err; 1078 1079 eeepc = kzalloc(sizeof(struct eeepc_wmi), GFP_KERNEL); 1080 if (!eeepc) 1081 return -ENOMEM; 1082 1083 eeepc->platform_device = pdev; 1084 platform_set_drvdata(eeepc->platform_device, eeepc); 1085 1086 eeepc->hotplug_wireless = hotplug_wireless; 1087 eeepc_dmi_check(eeepc); 1088 1089 err = eeepc_wmi_platform_init(eeepc); 1090 if (err) 1091 goto fail_platform; 1092 1093 err = eeepc_wmi_input_init(eeepc); 1094 if (err) 1095 goto fail_input; 1096 1097 err = eeepc_wmi_led_init(eeepc); 1098 if (err) 1099 goto fail_leds; 1100 1101 err = eeepc_wmi_rfkill_init(eeepc); 1102 if (err) 1103 goto fail_rfkill; 1104 1105 if (!acpi_video_backlight_support()) { 1106 err = eeepc_wmi_backlight_init(eeepc); 1107 if (err) 1108 goto fail_backlight; 1109 } else 1110 pr_info("Backlight controlled by ACPI video driver\n"); 1111 1112 status = wmi_install_notify_handler(EEEPC_WMI_EVENT_GUID, 1113 eeepc_wmi_notify, eeepc); 1114 if (ACPI_FAILURE(status)) { 1115 pr_err("Unable to register notify handler - %d\n", 1116 status); 1117 err = -ENODEV; 1118 goto fail_wmi_handler; 1119 } 1120 1121 err = eeepc_wmi_debugfs_init(eeepc); 1122 if (err) 1123 goto fail_debugfs; 1124 1125 return 0; 1126 1127 fail_debugfs: 1128 wmi_remove_notify_handler(EEEPC_WMI_EVENT_GUID); 1129 fail_wmi_handler: 1130 eeepc_wmi_backlight_exit(eeepc); 1131 fail_backlight: 1132 eeepc_wmi_rfkill_exit(eeepc); 1133 fail_rfkill: 1134 eeepc_wmi_led_exit(eeepc); 1135 fail_leds: 1136 eeepc_wmi_input_exit(eeepc); 1137 fail_input: 1138 eeepc_wmi_platform_exit(eeepc); 1139 fail_platform: 1140 kfree(eeepc); 1141 return err; 1142 } 1143 1144 static int __exit eeepc_wmi_remove(struct platform_device *device) 1145 { 1146 struct eeepc_wmi *eeepc; 1147 1148 eeepc = platform_get_drvdata(device); 1149 wmi_remove_notify_handler(EEEPC_WMI_EVENT_GUID); 1150 eeepc_wmi_backlight_exit(eeepc); 1151 eeepc_wmi_input_exit(eeepc); 1152 eeepc_wmi_led_exit(eeepc); 1153 eeepc_wmi_rfkill_exit(eeepc); 1154 eeepc_wmi_debugfs_exit(eeepc); 1155 eeepc_wmi_platform_exit(eeepc); 1156 1157 kfree(eeepc); 1158 return 0; 1159 } 1160 1161 /* 1162 * Platform driver - hibernate/resume callbacks 1163 */ 1164 static int eeepc_hotk_thaw(struct device *device) 1165 { 1166 struct eeepc_wmi *eeepc = dev_get_drvdata(device); 1167 1168 if (eeepc->wlan_rfkill) { 1169 bool wlan; 1170 1171 /* 1172 * Work around bios bug - acpi _PTS turns off the wireless led 1173 * during suspend. Normally it restores it on resume, but 1174 * we should kick it ourselves in case hibernation is aborted. 1175 */ 1176 wlan = eeepc_wmi_get_devstate_simple(EEEPC_WMI_DEVID_WLAN); 1177 eeepc_wmi_set_devstate(EEEPC_WMI_DEVID_WLAN, wlan, NULL); 1178 } 1179 1180 return 0; 1181 } 1182 1183 static int eeepc_hotk_restore(struct device *device) 1184 { 1185 struct eeepc_wmi *eeepc = dev_get_drvdata(device); 1186 int bl; 1187 1188 /* Refresh both wlan rfkill state and pci hotplug */ 1189 if (eeepc->wlan_rfkill) 1190 eeepc_rfkill_hotplug(eeepc); 1191 1192 if (eeepc->bluetooth_rfkill) { 1193 bl = !eeepc_wmi_get_devstate_simple(EEEPC_WMI_DEVID_BLUETOOTH); 1194 rfkill_set_sw_state(eeepc->bluetooth_rfkill, bl); 1195 } 1196 if (eeepc->wwan3g_rfkill) { 1197 bl = !eeepc_wmi_get_devstate_simple(EEEPC_WMI_DEVID_WWAN3G); 1198 rfkill_set_sw_state(eeepc->wwan3g_rfkill, bl); 1199 } 1200 1201 return 0; 1202 } 1203 1204 static const struct dev_pm_ops eeepc_pm_ops = { 1205 .thaw = eeepc_hotk_thaw, 1206 .restore = eeepc_hotk_restore, 1207 }; 1208 1209 static struct platform_driver platform_driver = { 1210 .remove = __exit_p(eeepc_wmi_remove), 1211 .driver = { 1212 .name = EEEPC_WMI_FILE, 1213 .owner = THIS_MODULE, 1214 .pm = &eeepc_pm_ops, 1215 }, 1216 }; 1217 1218 static acpi_status __init eeepc_wmi_parse_device(acpi_handle handle, u32 level, 1219 void *context, void **retval) 1220 { 1221 pr_warning("Found legacy ATKD device (%s)", EEEPC_ACPI_HID); 1222 *(bool *)context = true; 1223 return AE_CTRL_TERMINATE; 1224 } 1225 1226 static int __init eeepc_wmi_check_atkd(void) 1227 { 1228 acpi_status status; 1229 bool found = false; 1230 1231 status = acpi_get_devices(EEEPC_ACPI_HID, eeepc_wmi_parse_device, 1232 &found, NULL); 1233 1234 if (ACPI_FAILURE(status) || !found) 1235 return 0; 1236 return -1; 1237 } 1238 1239 static int __init eeepc_wmi_probe(struct platform_device *pdev) 1240 { 1241 if (!wmi_has_guid(EEEPC_WMI_EVENT_GUID) || 1242 !wmi_has_guid(EEEPC_WMI_MGMT_GUID)) { 1243 pr_warning("No known WMI GUID found\n"); 1244 return -ENODEV; 1245 } 1246 1247 if (eeepc_wmi_check_atkd()) { 1248 pr_warning("WMI device present, but legacy ATKD device is also " 1249 "present and enabled."); 1250 pr_warning("You probably booted with acpi_osi=\"Linux\" or " 1251 "acpi_osi=\"!Windows 2009\""); 1252 pr_warning("Can't load eeepc-wmi, use default acpi_osi " 1253 "(preferred) or eeepc-laptop"); 1254 return -ENODEV; 1255 } 1256 1257 return eeepc_wmi_add(pdev); 1258 } 1259 1260 static struct platform_device *platform_device; 1261 1262 static int __init eeepc_wmi_init(void) 1263 { 1264 platform_device = platform_create_bundle(&platform_driver, 1265 eeepc_wmi_probe, 1266 NULL, 0, NULL, 0); 1267 if (IS_ERR(platform_device)) 1268 return PTR_ERR(platform_device); 1269 return 0; 1270 } 1271 1272 static void __exit eeepc_wmi_exit(void) 1273 { 1274 platform_device_unregister(platform_device); 1275 platform_driver_unregister(&platform_driver); 1276 } 1277 1278 module_init(eeepc_wmi_init); 1279 module_exit(eeepc_wmi_exit); 1280