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