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; 140 141 struct eeepc_wmi_debug debug; 142 }; 143 144 /* Only used in eeepc_wmi_init() and eeepc_wmi_exit() */ 145 static struct platform_device *platform_device; 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 /* 258 * LEDs 259 */ 260 /* 261 * These functions actually update the LED's, and are called from a 262 * workqueue. By doing this as separate work rather than when the LED 263 * subsystem asks, we avoid messing with the Eeepc ACPI stuff during a 264 * potentially bad time, such as a timer interrupt. 265 */ 266 static void tpd_led_update(struct work_struct *work) 267 { 268 int ctrl_param; 269 struct eeepc_wmi *eeepc; 270 271 eeepc = container_of(work, struct eeepc_wmi, tpd_led_work); 272 273 ctrl_param = eeepc->tpd_led_wk; 274 eeepc_wmi_set_devstate(EEEPC_WMI_DEVID_TPDLED, ctrl_param, NULL); 275 } 276 277 static void tpd_led_set(struct led_classdev *led_cdev, 278 enum led_brightness value) 279 { 280 struct eeepc_wmi *eeepc; 281 282 eeepc = container_of(led_cdev, struct eeepc_wmi, tpd_led); 283 284 eeepc->tpd_led_wk = !!value; 285 queue_work(eeepc->led_workqueue, &eeepc->tpd_led_work); 286 } 287 288 static int read_tpd_state(struct eeepc_wmi *eeepc) 289 { 290 u32 retval; 291 acpi_status status; 292 293 status = eeepc_wmi_get_devstate(EEEPC_WMI_DEVID_TPDLED, &retval); 294 295 if (ACPI_FAILURE(status)) 296 return -1; 297 else if (!retval || retval == 0x00060000) 298 /* 299 * if touchpad led is present, DSTS will set some bits, 300 * usually 0x00020000. 301 * 0x00060000 means that the device is not supported 302 */ 303 return -ENODEV; 304 else 305 /* Status is stored in the first bit */ 306 return retval & 0x1; 307 } 308 309 static enum led_brightness tpd_led_get(struct led_classdev *led_cdev) 310 { 311 struct eeepc_wmi *eeepc; 312 313 eeepc = container_of(led_cdev, struct eeepc_wmi, tpd_led); 314 315 return read_tpd_state(eeepc); 316 } 317 318 static int eeepc_wmi_led_init(struct eeepc_wmi *eeepc) 319 { 320 int rv; 321 322 if (read_tpd_state(eeepc) < 0) 323 return 0; 324 325 eeepc->led_workqueue = create_singlethread_workqueue("led_workqueue"); 326 if (!eeepc->led_workqueue) 327 return -ENOMEM; 328 INIT_WORK(&eeepc->tpd_led_work, tpd_led_update); 329 330 eeepc->tpd_led.name = "eeepc::touchpad"; 331 eeepc->tpd_led.brightness_set = tpd_led_set; 332 eeepc->tpd_led.brightness_get = tpd_led_get; 333 eeepc->tpd_led.max_brightness = 1; 334 335 rv = led_classdev_register(&eeepc->platform_device->dev, 336 &eeepc->tpd_led); 337 if (rv) { 338 destroy_workqueue(eeepc->led_workqueue); 339 return rv; 340 } 341 342 return 0; 343 } 344 345 static void eeepc_wmi_led_exit(struct eeepc_wmi *eeepc) 346 { 347 if (eeepc->tpd_led.dev) 348 led_classdev_unregister(&eeepc->tpd_led); 349 if (eeepc->led_workqueue) 350 destroy_workqueue(eeepc->led_workqueue); 351 } 352 353 /* 354 * PCI hotplug (for wlan rfkill) 355 */ 356 static bool eeepc_wlan_rfkill_blocked(struct eeepc_wmi *eeepc) 357 { 358 u32 retval; 359 acpi_status status; 360 361 status = eeepc_wmi_get_devstate(EEEPC_WMI_DEVID_WLAN, &retval); 362 363 if (ACPI_FAILURE(status)) 364 return false; 365 366 return !(retval & 0x1); 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 = eeepc_wlan_rfkill_blocked(eeepc); 374 bool absent; 375 u32 l; 376 377 if (eeepc->wlan_rfkill) 378 rfkill_set_sw_state(eeepc->wlan_rfkill, blocked); 379 380 mutex_lock(&eeepc->hotplug_lock); 381 382 if (eeepc->hotplug_slot) { 383 bus = pci_find_bus(0, 1); 384 if (!bus) { 385 pr_warning("Unable to find PCI bus 1?\n"); 386 goto out_unlock; 387 } 388 389 if (pci_bus_read_config_dword(bus, 0, PCI_VENDOR_ID, &l)) { 390 pr_err("Unable to read PCI config space?\n"); 391 goto out_unlock; 392 } 393 absent = (l == 0xffffffff); 394 395 if (blocked != absent) { 396 pr_warning("BIOS says wireless lan is %s, " 397 "but the pci device is %s\n", 398 blocked ? "blocked" : "unblocked", 399 absent ? "absent" : "present"); 400 pr_warning("skipped wireless hotplug as probably " 401 "inappropriate for this model\n"); 402 goto out_unlock; 403 } 404 405 if (!blocked) { 406 dev = pci_get_slot(bus, 0); 407 if (dev) { 408 /* Device already present */ 409 pci_dev_put(dev); 410 goto out_unlock; 411 } 412 dev = pci_scan_single_device(bus, 0); 413 if (dev) { 414 pci_bus_assign_resources(bus); 415 if (pci_bus_add_device(dev)) 416 pr_err("Unable to hotplug wifi\n"); 417 } 418 } else { 419 dev = pci_get_slot(bus, 0); 420 if (dev) { 421 pci_remove_bus_device(dev); 422 pci_dev_put(dev); 423 } 424 } 425 } 426 427 out_unlock: 428 mutex_unlock(&eeepc->hotplug_lock); 429 } 430 431 static void eeepc_rfkill_notify(acpi_handle handle, u32 event, void *data) 432 { 433 struct eeepc_wmi *eeepc = data; 434 435 if (event != ACPI_NOTIFY_BUS_CHECK) 436 return; 437 438 eeepc_rfkill_hotplug(eeepc); 439 } 440 441 static int eeepc_register_rfkill_notifier(struct eeepc_wmi *eeepc, 442 char *node) 443 { 444 acpi_status status; 445 acpi_handle handle; 446 447 status = acpi_get_handle(NULL, node, &handle); 448 449 if (ACPI_SUCCESS(status)) { 450 status = acpi_install_notify_handler(handle, 451 ACPI_SYSTEM_NOTIFY, 452 eeepc_rfkill_notify, 453 eeepc); 454 if (ACPI_FAILURE(status)) 455 pr_warning("Failed to register notify on %s\n", node); 456 } else 457 return -ENODEV; 458 459 return 0; 460 } 461 462 static void eeepc_unregister_rfkill_notifier(struct eeepc_wmi *eeepc, 463 char *node) 464 { 465 acpi_status status = AE_OK; 466 acpi_handle handle; 467 468 status = acpi_get_handle(NULL, node, &handle); 469 470 if (ACPI_SUCCESS(status)) { 471 status = acpi_remove_notify_handler(handle, 472 ACPI_SYSTEM_NOTIFY, 473 eeepc_rfkill_notify); 474 if (ACPI_FAILURE(status)) 475 pr_err("Error removing rfkill notify handler %s\n", 476 node); 477 } 478 } 479 480 static int eeepc_get_adapter_status(struct hotplug_slot *hotplug_slot, 481 u8 *value) 482 { 483 u32 retval; 484 acpi_status status; 485 486 status = eeepc_wmi_get_devstate(EEEPC_WMI_DEVID_WLAN, &retval); 487 488 if (ACPI_FAILURE(status)) 489 return -EIO; 490 491 if (!retval || retval == 0x00060000) 492 return -ENODEV; 493 else 494 *value = (retval & 0x1); 495 496 return 0; 497 } 498 499 static void eeepc_cleanup_pci_hotplug(struct hotplug_slot *hotplug_slot) 500 { 501 kfree(hotplug_slot->info); 502 kfree(hotplug_slot); 503 } 504 505 static struct hotplug_slot_ops eeepc_hotplug_slot_ops = { 506 .owner = THIS_MODULE, 507 .get_adapter_status = eeepc_get_adapter_status, 508 .get_power_status = eeepc_get_adapter_status, 509 }; 510 511 static int eeepc_setup_pci_hotplug(struct eeepc_wmi *eeepc) 512 { 513 int ret = -ENOMEM; 514 struct pci_bus *bus = pci_find_bus(0, 1); 515 516 if (!bus) { 517 pr_err("Unable to find wifi PCI bus\n"); 518 return -ENODEV; 519 } 520 521 eeepc->hotplug_slot = kzalloc(sizeof(struct hotplug_slot), GFP_KERNEL); 522 if (!eeepc->hotplug_slot) 523 goto error_slot; 524 525 eeepc->hotplug_slot->info = kzalloc(sizeof(struct hotplug_slot_info), 526 GFP_KERNEL); 527 if (!eeepc->hotplug_slot->info) 528 goto error_info; 529 530 eeepc->hotplug_slot->private = eeepc; 531 eeepc->hotplug_slot->release = &eeepc_cleanup_pci_hotplug; 532 eeepc->hotplug_slot->ops = &eeepc_hotplug_slot_ops; 533 eeepc_get_adapter_status(eeepc->hotplug_slot, 534 &eeepc->hotplug_slot->info->adapter_status); 535 536 ret = pci_hp_register(eeepc->hotplug_slot, bus, 0, "eeepc-wifi"); 537 if (ret) { 538 pr_err("Unable to register hotplug slot - %d\n", ret); 539 goto error_register; 540 } 541 542 return 0; 543 544 error_register: 545 kfree(eeepc->hotplug_slot->info); 546 error_info: 547 kfree(eeepc->hotplug_slot); 548 eeepc->hotplug_slot = NULL; 549 error_slot: 550 return ret; 551 } 552 553 /* 554 * Rfkill devices 555 */ 556 static int eeepc_rfkill_set(void *data, bool blocked) 557 { 558 int dev_id = (unsigned long)data; 559 u32 ctrl_param = !blocked; 560 561 return eeepc_wmi_set_devstate(dev_id, ctrl_param, NULL); 562 } 563 564 static void eeepc_rfkill_query(struct rfkill *rfkill, void *data) 565 { 566 int dev_id = (unsigned long)data; 567 u32 retval; 568 acpi_status status; 569 570 status = eeepc_wmi_get_devstate(dev_id, &retval); 571 572 if (ACPI_FAILURE(status)) 573 return ; 574 575 rfkill_set_sw_state(rfkill, !(retval & 0x1)); 576 } 577 578 static const struct rfkill_ops eeepc_rfkill_ops = { 579 .set_block = eeepc_rfkill_set, 580 .query = eeepc_rfkill_query, 581 }; 582 583 static int eeepc_new_rfkill(struct eeepc_wmi *eeepc, 584 struct rfkill **rfkill, 585 const char *name, 586 enum rfkill_type type, int dev_id) 587 { 588 int result; 589 u32 retval; 590 acpi_status status; 591 592 status = eeepc_wmi_get_devstate(dev_id, &retval); 593 594 if (ACPI_FAILURE(status)) 595 return -1; 596 597 /* If the device is present, DSTS will always set some bits 598 * 0x00070000 - 1110000000000000000 - device supported 599 * 0x00060000 - 1100000000000000000 - not supported 600 * 0x00020000 - 0100000000000000000 - device supported 601 * 0x00010000 - 0010000000000000000 - not supported / special mode ? 602 */ 603 if (!retval || retval == 0x00060000) 604 return -ENODEV; 605 606 *rfkill = rfkill_alloc(name, &eeepc->platform_device->dev, type, 607 &eeepc_rfkill_ops, (void *)(long)dev_id); 608 609 if (!*rfkill) 610 return -EINVAL; 611 612 rfkill_init_sw_state(*rfkill, !(retval & 0x1)); 613 result = rfkill_register(*rfkill); 614 if (result) { 615 rfkill_destroy(*rfkill); 616 *rfkill = NULL; 617 return result; 618 } 619 return 0; 620 } 621 622 static void eeepc_wmi_rfkill_exit(struct eeepc_wmi *eeepc) 623 { 624 eeepc_unregister_rfkill_notifier(eeepc, "\\_SB.PCI0.P0P5"); 625 eeepc_unregister_rfkill_notifier(eeepc, "\\_SB.PCI0.P0P6"); 626 eeepc_unregister_rfkill_notifier(eeepc, "\\_SB.PCI0.P0P7"); 627 if (eeepc->wlan_rfkill) { 628 rfkill_unregister(eeepc->wlan_rfkill); 629 rfkill_destroy(eeepc->wlan_rfkill); 630 eeepc->wlan_rfkill = NULL; 631 } 632 /* 633 * Refresh pci hotplug in case the rfkill state was changed after 634 * eeepc_unregister_rfkill_notifier() 635 */ 636 eeepc_rfkill_hotplug(eeepc); 637 if (eeepc->hotplug_slot) 638 pci_hp_deregister(eeepc->hotplug_slot); 639 640 if (eeepc->bluetooth_rfkill) { 641 rfkill_unregister(eeepc->bluetooth_rfkill); 642 rfkill_destroy(eeepc->bluetooth_rfkill); 643 eeepc->bluetooth_rfkill = NULL; 644 } 645 if (eeepc->wwan3g_rfkill) { 646 rfkill_unregister(eeepc->wwan3g_rfkill); 647 rfkill_destroy(eeepc->wwan3g_rfkill); 648 eeepc->wwan3g_rfkill = NULL; 649 } 650 } 651 652 static int eeepc_wmi_rfkill_init(struct eeepc_wmi *eeepc) 653 { 654 int result = 0; 655 656 mutex_init(&eeepc->hotplug_lock); 657 658 result = eeepc_new_rfkill(eeepc, &eeepc->wlan_rfkill, 659 "eeepc-wlan", RFKILL_TYPE_WLAN, 660 EEEPC_WMI_DEVID_WLAN); 661 662 if (result && result != -ENODEV) 663 goto exit; 664 665 result = eeepc_new_rfkill(eeepc, &eeepc->bluetooth_rfkill, 666 "eeepc-bluetooth", RFKILL_TYPE_BLUETOOTH, 667 EEEPC_WMI_DEVID_BLUETOOTH); 668 669 if (result && result != -ENODEV) 670 goto exit; 671 672 result = eeepc_new_rfkill(eeepc, &eeepc->wwan3g_rfkill, 673 "eeepc-wwan3g", RFKILL_TYPE_WWAN, 674 EEEPC_WMI_DEVID_WWAN3G); 675 676 if (result && result != -ENODEV) 677 goto exit; 678 679 result = eeepc_setup_pci_hotplug(eeepc); 680 /* 681 * If we get -EBUSY then something else is handling the PCI hotplug - 682 * don't fail in this case 683 */ 684 if (result == -EBUSY) 685 result = 0; 686 687 eeepc_register_rfkill_notifier(eeepc, "\\_SB.PCI0.P0P5"); 688 eeepc_register_rfkill_notifier(eeepc, "\\_SB.PCI0.P0P6"); 689 eeepc_register_rfkill_notifier(eeepc, "\\_SB.PCI0.P0P7"); 690 /* 691 * Refresh pci hotplug in case the rfkill state was changed during 692 * setup. 693 */ 694 eeepc_rfkill_hotplug(eeepc); 695 696 exit: 697 if (result && result != -ENODEV) 698 eeepc_wmi_rfkill_exit(eeepc); 699 700 if (result == -ENODEV) 701 result = 0; 702 703 return result; 704 } 705 706 /* 707 * Backlight 708 */ 709 static int read_brightness(struct backlight_device *bd) 710 { 711 u32 retval; 712 acpi_status status; 713 714 status = eeepc_wmi_get_devstate(EEEPC_WMI_DEVID_BACKLIGHT, &retval); 715 716 if (ACPI_FAILURE(status)) 717 return -1; 718 else 719 return retval & 0xFF; 720 } 721 722 static int update_bl_status(struct backlight_device *bd) 723 { 724 725 u32 ctrl_param; 726 acpi_status status; 727 728 ctrl_param = bd->props.brightness; 729 730 status = eeepc_wmi_set_devstate(EEEPC_WMI_DEVID_BACKLIGHT, 731 ctrl_param, NULL); 732 733 if (ACPI_FAILURE(status)) 734 return -1; 735 else 736 return 0; 737 } 738 739 static const struct backlight_ops eeepc_wmi_bl_ops = { 740 .get_brightness = read_brightness, 741 .update_status = update_bl_status, 742 }; 743 744 static int eeepc_wmi_backlight_notify(struct eeepc_wmi *eeepc, int code) 745 { 746 struct backlight_device *bd = eeepc->backlight_device; 747 int old = bd->props.brightness; 748 int new = old; 749 750 if (code >= NOTIFY_BRNUP_MIN && code <= NOTIFY_BRNUP_MAX) 751 new = code - NOTIFY_BRNUP_MIN + 1; 752 else if (code >= NOTIFY_BRNDOWN_MIN && code <= NOTIFY_BRNDOWN_MAX) 753 new = code - NOTIFY_BRNDOWN_MIN; 754 755 bd->props.brightness = new; 756 backlight_update_status(bd); 757 backlight_force_update(bd, BACKLIGHT_UPDATE_HOTKEY); 758 759 return old; 760 } 761 762 static int eeepc_wmi_backlight_init(struct eeepc_wmi *eeepc) 763 { 764 struct backlight_device *bd; 765 struct backlight_properties props; 766 767 memset(&props, 0, sizeof(struct backlight_properties)); 768 props.max_brightness = 15; 769 bd = backlight_device_register(EEEPC_WMI_FILE, 770 &eeepc->platform_device->dev, eeepc, 771 &eeepc_wmi_bl_ops, &props); 772 if (IS_ERR(bd)) { 773 pr_err("Could not register backlight device\n"); 774 return PTR_ERR(bd); 775 } 776 777 eeepc->backlight_device = bd; 778 779 bd->props.brightness = read_brightness(bd); 780 bd->props.power = FB_BLANK_UNBLANK; 781 backlight_update_status(bd); 782 783 return 0; 784 } 785 786 static void eeepc_wmi_backlight_exit(struct eeepc_wmi *eeepc) 787 { 788 if (eeepc->backlight_device) 789 backlight_device_unregister(eeepc->backlight_device); 790 791 eeepc->backlight_device = NULL; 792 } 793 794 static void eeepc_wmi_notify(u32 value, void *context) 795 { 796 struct eeepc_wmi *eeepc = context; 797 struct acpi_buffer response = { ACPI_ALLOCATE_BUFFER, NULL }; 798 union acpi_object *obj; 799 acpi_status status; 800 int code; 801 int orig_code; 802 803 status = wmi_get_event_data(value, &response); 804 if (status != AE_OK) { 805 pr_err("bad event status 0x%x\n", status); 806 return; 807 } 808 809 obj = (union acpi_object *)response.pointer; 810 811 if (obj && obj->type == ACPI_TYPE_INTEGER) { 812 code = obj->integer.value; 813 orig_code = code; 814 815 if (code >= NOTIFY_BRNUP_MIN && code <= NOTIFY_BRNUP_MAX) 816 code = NOTIFY_BRNUP_MIN; 817 else if (code >= NOTIFY_BRNDOWN_MIN && 818 code <= NOTIFY_BRNDOWN_MAX) 819 code = NOTIFY_BRNDOWN_MIN; 820 821 if (code == NOTIFY_BRNUP_MIN || code == NOTIFY_BRNDOWN_MIN) { 822 if (!acpi_video_backlight_support()) 823 eeepc_wmi_backlight_notify(eeepc, orig_code); 824 } 825 826 if (!sparse_keymap_report_event(eeepc->inputdev, 827 code, 1, true)) 828 pr_info("Unknown key %x pressed\n", code); 829 } 830 831 kfree(obj); 832 } 833 834 static ssize_t store_cpufv(struct device *dev, struct device_attribute *attr, 835 const char *buf, size_t count) 836 { 837 int value; 838 struct acpi_buffer input = { (acpi_size)sizeof(value), &value }; 839 acpi_status status; 840 841 if (!count || sscanf(buf, "%i", &value) != 1) 842 return -EINVAL; 843 if (value < 0 || value > 2) 844 return -EINVAL; 845 846 status = wmi_evaluate_method(EEEPC_WMI_MGMT_GUID, 847 1, EEEPC_WMI_METHODID_CFVS, &input, NULL); 848 849 if (ACPI_FAILURE(status)) 850 return -EIO; 851 else 852 return count; 853 } 854 855 static DEVICE_ATTR(cpufv, S_IRUGO | S_IWUSR, NULL, store_cpufv); 856 857 static struct attribute *platform_attributes[] = { 858 &dev_attr_cpufv.attr, 859 NULL 860 }; 861 862 static struct attribute_group platform_attribute_group = { 863 .attrs = platform_attributes 864 }; 865 866 static void eeepc_wmi_sysfs_exit(struct platform_device *device) 867 { 868 sysfs_remove_group(&device->dev.kobj, &platform_attribute_group); 869 } 870 871 static int eeepc_wmi_sysfs_init(struct platform_device *device) 872 { 873 return sysfs_create_group(&device->dev.kobj, &platform_attribute_group); 874 } 875 876 /* 877 * Platform device 878 */ 879 static int __init eeepc_wmi_platform_init(struct eeepc_wmi *eeepc) 880 { 881 int err; 882 883 eeepc->platform_device = platform_device_alloc(EEEPC_WMI_FILE, -1); 884 if (!eeepc->platform_device) 885 return -ENOMEM; 886 platform_set_drvdata(eeepc->platform_device, eeepc); 887 888 err = platform_device_add(eeepc->platform_device); 889 if (err) 890 goto fail_platform_device; 891 892 err = eeepc_wmi_sysfs_init(eeepc->platform_device); 893 if (err) 894 goto fail_sysfs; 895 return 0; 896 897 fail_sysfs: 898 platform_device_del(eeepc->platform_device); 899 fail_platform_device: 900 platform_device_put(eeepc->platform_device); 901 return err; 902 } 903 904 static void eeepc_wmi_platform_exit(struct eeepc_wmi *eeepc) 905 { 906 eeepc_wmi_sysfs_exit(eeepc->platform_device); 907 platform_device_unregister(eeepc->platform_device); 908 } 909 910 /* 911 * debugfs 912 */ 913 struct eeepc_wmi_debugfs_node { 914 struct eeepc_wmi *eeepc; 915 char *name; 916 int (*show)(struct seq_file *m, void *data); 917 }; 918 919 static int show_dsts(struct seq_file *m, void *data) 920 { 921 struct eeepc_wmi *eeepc = m->private; 922 acpi_status status; 923 u32 retval = -1; 924 925 status = eeepc_wmi_get_devstate(eeepc->debug.dev_id, &retval); 926 927 if (ACPI_FAILURE(status)) 928 return -EIO; 929 930 seq_printf(m, "DSTS(%x) = %x\n", eeepc->debug.dev_id, retval); 931 932 return 0; 933 } 934 935 static int show_devs(struct seq_file *m, void *data) 936 { 937 struct eeepc_wmi *eeepc = m->private; 938 acpi_status status; 939 u32 retval = -1; 940 941 status = eeepc_wmi_set_devstate(eeepc->debug.dev_id, 942 eeepc->debug.ctrl_param, &retval); 943 if (ACPI_FAILURE(status)) 944 return -EIO; 945 946 seq_printf(m, "DEVS(%x, %x) = %x\n", eeepc->debug.dev_id, 947 eeepc->debug.ctrl_param, retval); 948 949 return 0; 950 } 951 952 static struct eeepc_wmi_debugfs_node eeepc_wmi_debug_files[] = { 953 { NULL, "devs", show_devs }, 954 { NULL, "dsts", show_dsts }, 955 }; 956 957 static int eeepc_wmi_debugfs_open(struct inode *inode, struct file *file) 958 { 959 struct eeepc_wmi_debugfs_node *node = inode->i_private; 960 961 return single_open(file, node->show, node->eeepc); 962 } 963 964 static const struct file_operations eeepc_wmi_debugfs_io_ops = { 965 .owner = THIS_MODULE, 966 .open = eeepc_wmi_debugfs_open, 967 .read = seq_read, 968 .llseek = seq_lseek, 969 .release = single_release, 970 }; 971 972 static void eeepc_wmi_debugfs_exit(struct eeepc_wmi *eeepc) 973 { 974 debugfs_remove_recursive(eeepc->debug.root); 975 } 976 977 static int eeepc_wmi_debugfs_init(struct eeepc_wmi *eeepc) 978 { 979 struct dentry *dent; 980 int i; 981 982 eeepc->debug.root = debugfs_create_dir(EEEPC_WMI_FILE, NULL); 983 if (!eeepc->debug.root) { 984 pr_err("failed to create debugfs directory"); 985 goto error_debugfs; 986 } 987 988 dent = debugfs_create_x32("dev_id", S_IRUGO|S_IWUSR, 989 eeepc->debug.root, &eeepc->debug.dev_id); 990 if (!dent) 991 goto error_debugfs; 992 993 dent = debugfs_create_x32("ctrl_param", S_IRUGO|S_IWUSR, 994 eeepc->debug.root, &eeepc->debug.ctrl_param); 995 if (!dent) 996 goto error_debugfs; 997 998 for (i = 0; i < ARRAY_SIZE(eeepc_wmi_debug_files); i++) { 999 struct eeepc_wmi_debugfs_node *node = &eeepc_wmi_debug_files[i]; 1000 1001 node->eeepc = eeepc; 1002 dent = debugfs_create_file(node->name, S_IFREG | S_IRUGO, 1003 eeepc->debug.root, node, 1004 &eeepc_wmi_debugfs_io_ops); 1005 if (!dent) { 1006 pr_err("failed to create debug file: %s\n", node->name); 1007 goto error_debugfs; 1008 } 1009 } 1010 1011 return 0; 1012 1013 error_debugfs: 1014 eeepc_wmi_debugfs_exit(eeepc); 1015 return -ENOMEM; 1016 } 1017 1018 /* 1019 * WMI Driver 1020 */ 1021 static void eeepc_dmi_check(struct eeepc_wmi *eeepc) 1022 { 1023 const char *model; 1024 1025 model = dmi_get_system_info(DMI_PRODUCT_NAME); 1026 if (!model) 1027 return; 1028 1029 /* 1030 * Whitelist for wlan hotplug 1031 * 1032 * Eeepc 1000H needs the current hotplug code to handle 1033 * Fn+F2 correctly. We may add other Eeepc here later, but 1034 * it seems that most of the laptops supported by eeepc-wmi 1035 * don't need to be on this list 1036 */ 1037 if (strcmp(model, "1000H") == 0) { 1038 eeepc->hotplug_wireless = true; 1039 pr_info("wlan hotplug enabled\n"); 1040 } 1041 } 1042 1043 static struct platform_device * __init eeepc_wmi_add(void) 1044 { 1045 struct eeepc_wmi *eeepc; 1046 acpi_status status; 1047 int err; 1048 1049 eeepc = kzalloc(sizeof(struct eeepc_wmi), GFP_KERNEL); 1050 if (!eeepc) 1051 return ERR_PTR(-ENOMEM); 1052 1053 eeepc->hotplug_wireless = hotplug_wireless; 1054 eeepc_dmi_check(eeepc); 1055 1056 /* 1057 * Register the platform device first. It is used as a parent for the 1058 * sub-devices below. 1059 */ 1060 err = eeepc_wmi_platform_init(eeepc); 1061 if (err) 1062 goto fail_platform; 1063 1064 err = eeepc_wmi_input_init(eeepc); 1065 if (err) 1066 goto fail_input; 1067 1068 err = eeepc_wmi_led_init(eeepc); 1069 if (err) 1070 goto fail_leds; 1071 1072 err = eeepc_wmi_rfkill_init(eeepc); 1073 if (err) 1074 goto fail_rfkill; 1075 1076 if (!acpi_video_backlight_support()) { 1077 err = eeepc_wmi_backlight_init(eeepc); 1078 if (err) 1079 goto fail_backlight; 1080 } else 1081 pr_info("Backlight controlled by ACPI video driver\n"); 1082 1083 status = wmi_install_notify_handler(EEEPC_WMI_EVENT_GUID, 1084 eeepc_wmi_notify, eeepc); 1085 if (ACPI_FAILURE(status)) { 1086 pr_err("Unable to register notify handler - %d\n", 1087 status); 1088 err = -ENODEV; 1089 goto fail_wmi_handler; 1090 } 1091 1092 err = eeepc_wmi_debugfs_init(eeepc); 1093 if (err) 1094 goto fail_debugfs; 1095 1096 return eeepc->platform_device; 1097 1098 fail_debugfs: 1099 wmi_remove_notify_handler(EEEPC_WMI_EVENT_GUID); 1100 fail_wmi_handler: 1101 eeepc_wmi_backlight_exit(eeepc); 1102 fail_backlight: 1103 eeepc_wmi_rfkill_exit(eeepc); 1104 fail_rfkill: 1105 eeepc_wmi_led_exit(eeepc); 1106 fail_leds: 1107 eeepc_wmi_input_exit(eeepc); 1108 fail_input: 1109 eeepc_wmi_platform_exit(eeepc); 1110 fail_platform: 1111 kfree(eeepc); 1112 return ERR_PTR(err); 1113 } 1114 1115 static int eeepc_wmi_remove(struct platform_device *device) 1116 { 1117 struct eeepc_wmi *eeepc; 1118 1119 eeepc = platform_get_drvdata(device); 1120 wmi_remove_notify_handler(EEEPC_WMI_EVENT_GUID); 1121 eeepc_wmi_backlight_exit(eeepc); 1122 eeepc_wmi_input_exit(eeepc); 1123 eeepc_wmi_led_exit(eeepc); 1124 eeepc_wmi_rfkill_exit(eeepc); 1125 eeepc_wmi_debugfs_exit(eeepc); 1126 eeepc_wmi_platform_exit(eeepc); 1127 1128 kfree(eeepc); 1129 return 0; 1130 } 1131 1132 static struct platform_driver platform_driver = { 1133 .driver = { 1134 .name = EEEPC_WMI_FILE, 1135 .owner = THIS_MODULE, 1136 }, 1137 }; 1138 1139 static acpi_status __init eeepc_wmi_parse_device(acpi_handle handle, u32 level, 1140 void *context, void **retval) 1141 { 1142 pr_warning("Found legacy ATKD device (%s)", EEEPC_ACPI_HID); 1143 *(bool *)context = true; 1144 return AE_CTRL_TERMINATE; 1145 } 1146 1147 static int __init eeepc_wmi_check_atkd(void) 1148 { 1149 acpi_status status; 1150 bool found = false; 1151 1152 status = acpi_get_devices(EEEPC_ACPI_HID, eeepc_wmi_parse_device, 1153 &found, NULL); 1154 1155 if (ACPI_FAILURE(status) || !found) 1156 return 0; 1157 return -1; 1158 } 1159 1160 static int __init eeepc_wmi_init(void) 1161 { 1162 int err; 1163 1164 if (!wmi_has_guid(EEEPC_WMI_EVENT_GUID) || 1165 !wmi_has_guid(EEEPC_WMI_MGMT_GUID)) { 1166 pr_warning("No known WMI GUID found\n"); 1167 return -ENODEV; 1168 } 1169 1170 if (eeepc_wmi_check_atkd()) { 1171 pr_warning("WMI device present, but legacy ATKD device is also " 1172 "present and enabled."); 1173 pr_warning("You probably booted with acpi_osi=\"Linux\" or " 1174 "acpi_osi=\"!Windows 2009\""); 1175 pr_warning("Can't load eeepc-wmi, use default acpi_osi " 1176 "(preferred) or eeepc-laptop"); 1177 return -ENODEV; 1178 } 1179 1180 platform_device = eeepc_wmi_add(); 1181 if (IS_ERR(platform_device)) { 1182 err = PTR_ERR(platform_device); 1183 goto fail_eeepc_wmi; 1184 } 1185 1186 err = platform_driver_register(&platform_driver); 1187 if (err) { 1188 pr_warning("Unable to register platform driver\n"); 1189 goto fail_platform_driver; 1190 } 1191 1192 return 0; 1193 1194 fail_platform_driver: 1195 eeepc_wmi_remove(platform_device); 1196 fail_eeepc_wmi: 1197 return err; 1198 } 1199 1200 static void __exit eeepc_wmi_exit(void) 1201 { 1202 eeepc_wmi_remove(platform_device); 1203 platform_driver_unregister(&platform_driver); 1204 } 1205 1206 module_init(eeepc_wmi_init); 1207 module_exit(eeepc_wmi_exit); 1208