drivers/platform/x86/eeepc-wmi.c

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