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_DEVS 0x53564544
  69 #define EEEPC_WMI_METHODID_DSTS 0x53544344
  70 #define EEEPC_WMI_METHODID_CFVS 0x53564643
  71
  72 #define EEEPC_WMI_DEVID_BACKLIGHT       0x00050012
  73 #define EEEPC_WMI_DEVID_TPDLED          0x00100011
  74 #define EEEPC_WMI_DEVID_WLAN            0x00010011
  75 #define EEEPC_WMI_DEVID_BLUETOOTH       0x00010013
  76 #define EEEPC_WMI_DEVID_WWAN3G          0x00010019
  77
  78 static bool hotplug_wireless;
  79
  80 module_param(hotplug_wireless, bool, 0444);
  81 MODULE_PARM_DESC(hotplug_wireless,
  82                  "Enable hotplug for wireless device. "
  83                  "If your laptop needs that, please report to "
  84                  "acpi4asus-user@lists.sourceforge.net.");
  85
  86 static const struct key_entry eeepc_wmi_keymap[] = {
  87         /* Sleep already handled via generic ACPI code */
  88         { KE_IGNORE, NOTIFY_BRNDOWN_MIN, { KEY_BRIGHTNESSDOWN } },
  89         { KE_IGNORE, NOTIFY_BRNUP_MIN, { KEY_BRIGHTNESSUP } },
  90         { KE_KEY, 0x30, { KEY_VOLUMEUP } },
  91         { KE_KEY, 0x31, { KEY_VOLUMEDOWN } },
  92         { KE_KEY, 0x32, { KEY_MUTE } },
  93         { KE_KEY, 0x5c, { KEY_F15 } },
  94         { KE_KEY, 0x5d, { KEY_WLAN } },
  95         { KE_KEY, 0x6b, { KEY_F13 } }, /* Disable Touchpad */
  96         { KE_KEY, 0x88, { KEY_WLAN } },
  97         { KE_KEY, 0xcc, { KEY_SWITCHVIDEOMODE } },
  98         { KE_KEY, 0xe0, { KEY_PROG1 } },
  99         { KE_KEY, 0xe1, { KEY_F14 } },
 100         { KE_KEY, 0xe9, { KEY_DISPLAY_OFF } },
 101         { KE_END, 0},
 102 };
 103
 104 struct bios_args {
 105         u32     dev_id;
 106         u32     ctrl_param;
 107 };
 108
 109 /*
 110  * eeepc-wmi/    - debugfs root directory
 111  *   dev_id      - current dev_id
 112  *   ctrl_param  - current ctrl_param
 113  *   devs        - call DEVS(dev_id, ctrl_param) and print result
 114  *   dsts        - call DSTS(dev_id)  and print result
 115  */
 116 struct eeepc_wmi_debug {
 117         struct dentry *root;
 118         u32 dev_id;
 119         u32 ctrl_param;
 120 };
 121
 122 struct eeepc_wmi {
 123         bool hotplug_wireless;
 124
 125         struct input_dev *inputdev;
 126         struct backlight_device *backlight_device;
 127         struct platform_device *platform_device;
 128
 129         struct led_classdev tpd_led;
 130         int tpd_led_wk;
 131         struct workqueue_struct *led_workqueue;
 132         struct work_struct tpd_led_work;
 133
 134         struct rfkill *wlan_rfkill;
 135         struct rfkill *bluetooth_rfkill;
 136         struct rfkill *wwan3g_rfkill;
 137
 138         struct hotplug_slot *hotplug_slot;
 139         struct mutex hotplug_lock;
 140         struct mutex wmi_lock;
 141         struct workqueue_struct *hotplug_workqueue;
 142         struct work_struct hotplug_work;
 143
 144         struct eeepc_wmi_debug debug;
 145 };
 146
 147 /* Only used in eeepc_wmi_init() and eeepc_wmi_exit() */
 148 static struct platform_device *platform_device;
 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 /*
 261  * LEDs
 262  */
 263 /*
 264  * These functions actually update the LED's, and are called from a
 265  * workqueue. By doing this as separate work rather than when the LED
 266  * subsystem asks, we avoid messing with the Eeepc ACPI stuff during a
 267  * potentially bad time, such as a timer interrupt.
 268  */
 269 static void tpd_led_update(struct work_struct *work)
 270 {
 271         int ctrl_param;
 272         struct eeepc_wmi *eeepc;
 273
 274         eeepc = container_of(work, struct eeepc_wmi, tpd_led_work);
 275
 276         ctrl_param = eeepc->tpd_led_wk;
 277         eeepc_wmi_set_devstate(EEEPC_WMI_DEVID_TPDLED, ctrl_param, NULL);
 278 }
 279
 280 static void tpd_led_set(struct led_classdev *led_cdev,
 281                         enum led_brightness value)
 282 {
 283         struct eeepc_wmi *eeepc;
 284
 285         eeepc = container_of(led_cdev, struct eeepc_wmi, tpd_led);
 286
 287         eeepc->tpd_led_wk = !!value;
 288         queue_work(eeepc->led_workqueue, &eeepc->tpd_led_work);
 289 }
 290
 291 static int read_tpd_state(struct eeepc_wmi *eeepc)
 292 {
 293         u32 retval;
 294         acpi_status status;
 295
 296         status = eeepc_wmi_get_devstate(EEEPC_WMI_DEVID_TPDLED, &retval);
 297
 298         if (ACPI_FAILURE(status))
 299                 return -1;
 300         else if (!retval || retval == 0x00060000)
 301                 /*
 302                  * if touchpad led is present, DSTS will set some bits,
 303                  * usually 0x00020000.
 304                  * 0x00060000 means that the device is not supported
 305                  */
 306                 return -ENODEV;
 307         else
 308                 /* Status is stored in the first bit */
 309                 return retval & 0x1;
 310 }
 311
 312 static enum led_brightness tpd_led_get(struct led_classdev *led_cdev)
 313 {
 314         struct eeepc_wmi *eeepc;
 315
 316         eeepc = container_of(led_cdev, struct eeepc_wmi, tpd_led);
 317
 318         return read_tpd_state(eeepc);
 319 }
 320
 321 static int eeepc_wmi_led_init(struct eeepc_wmi *eeepc)
 322 {
 323         int rv;
 324
 325         if (read_tpd_state(eeepc) < 0)
 326                 return 0;
 327
 328         eeepc->led_workqueue = create_singlethread_workqueue("led_workqueue");
 329         if (!eeepc->led_workqueue)
 330                 return -ENOMEM;
 331         INIT_WORK(&eeepc->tpd_led_work, tpd_led_update);
 332
 333         eeepc->tpd_led.name = "eeepc::touchpad";
 334         eeepc->tpd_led.brightness_set = tpd_led_set;
 335         eeepc->tpd_led.brightness_get = tpd_led_get;
 336         eeepc->tpd_led.max_brightness = 1;
 337
 338         rv = led_classdev_register(&eeepc->platform_device->dev,
 339                                    &eeepc->tpd_led);
 340         if (rv) {
 341                 destroy_workqueue(eeepc->led_workqueue);
 342                 return rv;
 343         }
 344
 345         return 0;
 346 }
 347
 348 static void eeepc_wmi_led_exit(struct eeepc_wmi *eeepc)
 349 {
 350         if (eeepc->tpd_led.dev)
 351                 led_classdev_unregister(&eeepc->tpd_led);
 352         if (eeepc->led_workqueue)
 353                 destroy_workqueue(eeepc->led_workqueue);
 354 }
 355
 356 /*
 357  * PCI hotplug (for wlan rfkill)
 358  */
 359 static bool eeepc_wlan_rfkill_blocked(struct eeepc_wmi *eeepc)
 360 {
 361         u32 retval;
 362         acpi_status status;
 363
 364         status = eeepc_wmi_get_devstate(EEEPC_WMI_DEVID_WLAN, &retval);
 365
 366         if (ACPI_FAILURE(status))
 367                 return false;
 368
 369         return !(retval & 0x1);
 370 }
 371
 372 static void eeepc_rfkill_hotplug(struct eeepc_wmi *eeepc)
 373 {
 374         struct pci_dev *dev;
 375         struct pci_bus *bus;
 376         bool blocked;
 377         bool absent;
 378         u32 l;
 379
 380         mutex_lock(&eeepc->wmi_lock);
 381         blocked = eeepc_wlan_rfkill_blocked(eeepc);
 382         mutex_unlock(&eeepc->wmi_lock);
 383
 384         mutex_lock(&eeepc->hotplug_lock);
 385
 386         if (eeepc->wlan_rfkill)
 387                 rfkill_set_sw_state(eeepc->wlan_rfkill, blocked);
 388
 389         if (eeepc->hotplug_slot) {
 390                 bus = pci_find_bus(0, 1);
 391                 if (!bus) {
 392                         pr_warning("Unable to find PCI bus 1?\n");
 393                         goto out_unlock;
 394                 }
 395
 396                 if (pci_bus_read_config_dword(bus, 0, PCI_VENDOR_ID, &l)) {
 397                         pr_err("Unable to read PCI config space?\n");
 398                         goto out_unlock;
 399                 }
 400                 absent = (l == 0xffffffff);
 401
 402                 if (blocked != absent) {
 403                         pr_warning("BIOS says wireless lan is %s, "
 404                                         "but the pci device is %s\n",
 405                                 blocked ? "blocked" : "unblocked",
 406                                 absent ? "absent" : "present");
 407                         pr_warning("skipped wireless hotplug as probably "
 408                                         "inappropriate for this model\n");
 409                         goto out_unlock;
 410                 }
 411
 412                 if (!blocked) {
 413                         dev = pci_get_slot(bus, 0);
 414                         if (dev) {
 415                                 /* Device already present */
 416                                 pci_dev_put(dev);
 417                                 goto out_unlock;
 418                         }
 419                         dev = pci_scan_single_device(bus, 0);
 420                         if (dev) {
 421                                 pci_bus_assign_resources(bus);
 422                                 if (pci_bus_add_device(dev))
 423                                         pr_err("Unable to hotplug wifi\n");
 424                         }
 425                 } else {
 426                         dev = pci_get_slot(bus, 0);
 427                         if (dev) {
 428                                 pci_remove_bus_device(dev);
 429                                 pci_dev_put(dev);
 430                         }
 431                 }
 432         }
 433
 434 out_unlock:
 435         mutex_unlock(&eeepc->hotplug_lock);
 436 }
 437
 438 static void eeepc_rfkill_notify(acpi_handle handle, u32 event, void *data)
 439 {
 440         struct eeepc_wmi *eeepc = data;
 441
 442         if (event != ACPI_NOTIFY_BUS_CHECK)
 443                 return;
 444
 445         /*
 446          * We can't call directly eeepc_rfkill_hotplug because most
 447          * of the time WMBC is still being executed and not reetrant.
 448          * There is currently no way to tell ACPICA that  we want this
 449          * method to be serialized, we schedule a eeepc_rfkill_hotplug
 450          * call later, in a safer context.
 451          */
 452         queue_work(eeepc->hotplug_workqueue, &eeepc->hotplug_work);
 453 }
 454
 455 static int eeepc_register_rfkill_notifier(struct eeepc_wmi *eeepc,
 456                                           char *node)
 457 {
 458         acpi_status status;
 459         acpi_handle handle;
 460
 461         status = acpi_get_handle(NULL, node, &handle);
 462
 463         if (ACPI_SUCCESS(status)) {
 464                 status = acpi_install_notify_handler(handle,
 465                                                      ACPI_SYSTEM_NOTIFY,
 466                                                      eeepc_rfkill_notify,
 467                                                      eeepc);
 468                 if (ACPI_FAILURE(status))
 469                         pr_warning("Failed to register notify on %s\n", node);
 470         } else
 471                 return -ENODEV;
 472
 473         return 0;
 474 }
 475
 476 static void eeepc_unregister_rfkill_notifier(struct eeepc_wmi *eeepc,
 477                                              char *node)
 478 {
 479         acpi_status status = AE_OK;
 480         acpi_handle handle;
 481
 482         status = acpi_get_handle(NULL, node, &handle);
 483
 484         if (ACPI_SUCCESS(status)) {
 485                 status = acpi_remove_notify_handler(handle,
 486                                                      ACPI_SYSTEM_NOTIFY,
 487                                                      eeepc_rfkill_notify);
 488                 if (ACPI_FAILURE(status))
 489                         pr_err("Error removing rfkill notify handler %s\n",
 490                                 node);
 491         }
 492 }
 493
 494 static int eeepc_get_adapter_status(struct hotplug_slot *hotplug_slot,
 495                                     u8 *value)
 496 {
 497         u32 retval;
 498         acpi_status status;
 499
 500         status = eeepc_wmi_get_devstate(EEEPC_WMI_DEVID_WLAN, &retval);
 501
 502         if (ACPI_FAILURE(status))
 503                 return -EIO;
 504
 505         if (!retval || retval == 0x00060000)
 506                 return -ENODEV;
 507         else
 508                 *value = (retval & 0x1);
 509
 510         return 0;
 511 }
 512
 513 static void eeepc_cleanup_pci_hotplug(struct hotplug_slot *hotplug_slot)
 514 {
 515         kfree(hotplug_slot->info);
 516         kfree(hotplug_slot);
 517 }
 518
 519 static struct hotplug_slot_ops eeepc_hotplug_slot_ops = {
 520         .owner = THIS_MODULE,
 521         .get_adapter_status = eeepc_get_adapter_status,
 522         .get_power_status = eeepc_get_adapter_status,
 523 };
 524
 525 static void eeepc_hotplug_work(struct work_struct *work)
 526 {
 527         struct eeepc_wmi *eeepc;
 528
 529         eeepc = container_of(work, struct eeepc_wmi, hotplug_work);
 530         eeepc_rfkill_hotplug(eeepc);
 531 }
 532
 533 static int eeepc_setup_pci_hotplug(struct eeepc_wmi *eeepc)
 534 {
 535         int ret = -ENOMEM;
 536         struct pci_bus *bus = pci_find_bus(0, 1);
 537
 538         if (!bus) {
 539                 pr_err("Unable to find wifi PCI bus\n");
 540                 return -ENODEV;
 541         }
 542
 543         eeepc->hotplug_workqueue =
 544                 create_singlethread_workqueue("hotplug_workqueue");
 545         if (!eeepc->hotplug_workqueue)
 546                 goto error_workqueue;
 547
 548         INIT_WORK(&eeepc->hotplug_work, eeepc_hotplug_work);
 549
 550         eeepc->hotplug_slot = kzalloc(sizeof(struct hotplug_slot), GFP_KERNEL);
 551         if (!eeepc->hotplug_slot)
 552                 goto error_slot;
 553
 554         eeepc->hotplug_slot->info = kzalloc(sizeof(struct hotplug_slot_info),
 555                                             GFP_KERNEL);
 556         if (!eeepc->hotplug_slot->info)
 557                 goto error_info;
 558
 559         eeepc->hotplug_slot->private = eeepc;
 560         eeepc->hotplug_slot->release = &eeepc_cleanup_pci_hotplug;
 561         eeepc->hotplug_slot->ops = &eeepc_hotplug_slot_ops;
 562         eeepc_get_adapter_status(eeepc->hotplug_slot,
 563                                  &eeepc->hotplug_slot->info->adapter_status);
 564
 565         ret = pci_hp_register(eeepc->hotplug_slot, bus, 0, "eeepc-wifi");
 566         if (ret) {
 567                 pr_err("Unable to register hotplug slot - %d\n", ret);
 568                 goto error_register;
 569         }
 570
 571         return 0;
 572
 573 error_register:
 574         kfree(eeepc->hotplug_slot->info);
 575 error_info:
 576         kfree(eeepc->hotplug_slot);
 577         eeepc->hotplug_slot = NULL;
 578 error_slot:
 579         destroy_workqueue(eeepc->hotplug_workqueue);
 580 error_workqueue:
 581         return ret;
 582 }
 583
 584 /*
 585  * Rfkill devices
 586  */
 587 static int eeepc_rfkill_set(void *data, bool blocked)
 588 {
 589         int dev_id = (unsigned long)data;
 590         u32 ctrl_param = !blocked;
 591
 592         return eeepc_wmi_set_devstate(dev_id, ctrl_param, NULL);
 593 }
 594
 595 static void eeepc_rfkill_query(struct rfkill *rfkill, void *data)
 596 {
 597         int dev_id = (unsigned long)data;
 598         u32 retval;
 599         acpi_status status;
 600
 601         status = eeepc_wmi_get_devstate(dev_id, &retval);
 602
 603         if (ACPI_FAILURE(status))
 604                 return ;
 605
 606         rfkill_set_sw_state(rfkill, !(retval & 0x1));
 607 }
 608
 609 static int eeepc_rfkill_wlan_set(void *data, bool blocked)
 610 {
 611         struct eeepc_wmi *eeepc = data;
 612         int ret;
 613
 614         /*
 615          * This handler is enabled only if hotplug is enabled.
 616          * In this case, the eeepc_wmi_set_devstate() will
 617          * trigger a wmi notification and we need to wait
 618          * this call to finish before being able to call
 619          * any wmi method
 620          */
 621         mutex_lock(&eeepc->wmi_lock);
 622         ret = eeepc_rfkill_set((void *)(long)EEEPC_WMI_DEVID_WLAN, blocked);
 623         mutex_unlock(&eeepc->wmi_lock);
 624         return ret;
 625 }
 626
 627 static void eeepc_rfkill_wlan_query(struct rfkill *rfkill, void *data)
 628 {
 629         eeepc_rfkill_query(rfkill, (void *)(long)EEEPC_WMI_DEVID_WLAN);
 630 }
 631
 632 static const struct rfkill_ops eeepc_rfkill_wlan_ops = {
 633         .set_block = eeepc_rfkill_wlan_set,
 634         .query = eeepc_rfkill_wlan_query,
 635 };
 636
 637 static const struct rfkill_ops eeepc_rfkill_ops = {
 638         .set_block = eeepc_rfkill_set,
 639         .query = eeepc_rfkill_query,
 640 };
 641
 642 static int eeepc_new_rfkill(struct eeepc_wmi *eeepc,
 643                             struct rfkill **rfkill,
 644                             const char *name,
 645                             enum rfkill_type type, int dev_id)
 646 {
 647         int result;
 648         u32 retval;
 649         acpi_status status;
 650
 651         status = eeepc_wmi_get_devstate(dev_id, &retval);
 652
 653         if (ACPI_FAILURE(status))
 654                 return -1;
 655
 656         /* If the device is present, DSTS will always set some bits
 657          * 0x00070000 - 1110000000000000000 - device supported
 658          * 0x00060000 - 1100000000000000000 - not supported
 659          * 0x00020000 - 0100000000000000000 - device supported
 660          * 0x00010000 - 0010000000000000000 - not supported / special mode ?
 661          */
 662         if (!retval || retval == 0x00060000)
 663                 return -ENODEV;
 664
 665         if (dev_id == EEEPC_WMI_DEVID_WLAN && eeepc->hotplug_wireless)
 666                 *rfkill = rfkill_alloc(name, &eeepc->platform_device->dev, type,
 667                                        &eeepc_rfkill_wlan_ops, eeepc);
 668         else
 669                 *rfkill = rfkill_alloc(name, &eeepc->platform_device->dev, type,
 670                                        &eeepc_rfkill_ops, (void *)(long)dev_id);
 671
 672         if (!*rfkill)
 673                 return -EINVAL;
 674
 675         rfkill_init_sw_state(*rfkill, !(retval & 0x1));
 676         result = rfkill_register(*rfkill);
 677         if (result) {
 678                 rfkill_destroy(*rfkill);
 679                 *rfkill = NULL;
 680                 return result;
 681         }
 682         return 0;
 683 }
 684
 685 static void eeepc_wmi_rfkill_exit(struct eeepc_wmi *eeepc)
 686 {
 687         eeepc_unregister_rfkill_notifier(eeepc, "\\_SB.PCI0.P0P5");
 688         eeepc_unregister_rfkill_notifier(eeepc, "\\_SB.PCI0.P0P6");
 689         eeepc_unregister_rfkill_notifier(eeepc, "\\_SB.PCI0.P0P7");
 690         if (eeepc->wlan_rfkill) {
 691                 rfkill_unregister(eeepc->wlan_rfkill);
 692                 rfkill_destroy(eeepc->wlan_rfkill);
 693                 eeepc->wlan_rfkill = NULL;
 694         }
 695         /*
 696          * Refresh pci hotplug in case the rfkill state was changed after
 697          * eeepc_unregister_rfkill_notifier()
 698          */
 699         eeepc_rfkill_hotplug(eeepc);
 700         if (eeepc->hotplug_slot)
 701                 pci_hp_deregister(eeepc->hotplug_slot);
 702         if (eeepc->hotplug_workqueue)
 703                 destroy_workqueue(eeepc->hotplug_workqueue);
 704
 705         if (eeepc->bluetooth_rfkill) {
 706                 rfkill_unregister(eeepc->bluetooth_rfkill);
 707                 rfkill_destroy(eeepc->bluetooth_rfkill);
 708                 eeepc->bluetooth_rfkill = NULL;
 709         }
 710         if (eeepc->wwan3g_rfkill) {
 711                 rfkill_unregister(eeepc->wwan3g_rfkill);
 712                 rfkill_destroy(eeepc->wwan3g_rfkill);
 713                 eeepc->wwan3g_rfkill = NULL;
 714         }
 715 }
 716
 717 static int eeepc_wmi_rfkill_init(struct eeepc_wmi *eeepc)
 718 {
 719         int result = 0;
 720
 721         mutex_init(&eeepc->hotplug_lock);
 722         mutex_init(&eeepc->wmi_lock);
 723
 724         result = eeepc_new_rfkill(eeepc, &eeepc->wlan_rfkill,
 725                                   "eeepc-wlan", RFKILL_TYPE_WLAN,
 726                                   EEEPC_WMI_DEVID_WLAN);
 727
 728         if (result && result != -ENODEV)
 729                 goto exit;
 730
 731         result = eeepc_new_rfkill(eeepc, &eeepc->bluetooth_rfkill,
 732                                   "eeepc-bluetooth", RFKILL_TYPE_BLUETOOTH,
 733                                   EEEPC_WMI_DEVID_BLUETOOTH);
 734
 735         if (result && result != -ENODEV)
 736                 goto exit;
 737
 738         result = eeepc_new_rfkill(eeepc, &eeepc->wwan3g_rfkill,
 739                                   "eeepc-wwan3g", RFKILL_TYPE_WWAN,
 740                                   EEEPC_WMI_DEVID_WWAN3G);
 741
 742         if (result && result != -ENODEV)
 743                 goto exit;
 744
 745         result = eeepc_setup_pci_hotplug(eeepc);
 746         /*
 747          * If we get -EBUSY then something else is handling the PCI hotplug -
 748          * don't fail in this case
 749          */
 750         if (result == -EBUSY)
 751                 result = 0;
 752
 753         eeepc_register_rfkill_notifier(eeepc, "\\_SB.PCI0.P0P5");
 754         eeepc_register_rfkill_notifier(eeepc, "\\_SB.PCI0.P0P6");
 755         eeepc_register_rfkill_notifier(eeepc, "\\_SB.PCI0.P0P7");
 756         /*
 757          * Refresh pci hotplug in case the rfkill state was changed during
 758          * setup.
 759          */
 760         eeepc_rfkill_hotplug(eeepc);
 761
 762 exit:
 763         if (result && result != -ENODEV)
 764                 eeepc_wmi_rfkill_exit(eeepc);
 765
 766         if (result == -ENODEV)
 767                 result = 0;
 768
 769         return result;
 770 }
 771
 772 /*
 773  * Backlight
 774  */
 775 static int read_brightness(struct backlight_device *bd)
 776 {
 777         u32 retval;
 778         acpi_status status;
 779
 780         status = eeepc_wmi_get_devstate(EEEPC_WMI_DEVID_BACKLIGHT, &retval);
 781
 782         if (ACPI_FAILURE(status))
 783                 return -1;
 784         else
 785                 return retval & 0xFF;
 786 }
 787
 788 static int update_bl_status(struct backlight_device *bd)
 789 {
 790
 791         u32 ctrl_param;
 792         acpi_status status;
 793
 794         ctrl_param = bd->props.brightness;
 795
 796         status = eeepc_wmi_set_devstate(EEEPC_WMI_DEVID_BACKLIGHT,
 797                                         ctrl_param, NULL);
 798
 799         if (ACPI_FAILURE(status))
 800                 return -1;
 801         else
 802                 return 0;
 803 }
 804
 805 static const struct backlight_ops eeepc_wmi_bl_ops = {
 806         .get_brightness = read_brightness,
 807         .update_status = update_bl_status,
 808 };
 809
 810 static int eeepc_wmi_backlight_notify(struct eeepc_wmi *eeepc, int code)
 811 {
 812         struct backlight_device *bd = eeepc->backlight_device;
 813         int old = bd->props.brightness;
 814         int new = old;
 815
 816         if (code >= NOTIFY_BRNUP_MIN && code <= NOTIFY_BRNUP_MAX)
 817                 new = code - NOTIFY_BRNUP_MIN + 1;
 818         else if (code >= NOTIFY_BRNDOWN_MIN && code <= NOTIFY_BRNDOWN_MAX)
 819                 new = code - NOTIFY_BRNDOWN_MIN;
 820
 821         bd->props.brightness = new;
 822         backlight_update_status(bd);
 823         backlight_force_update(bd, BACKLIGHT_UPDATE_HOTKEY);
 824
 825         return old;
 826 }
 827
 828 static int eeepc_wmi_backlight_init(struct eeepc_wmi *eeepc)
 829 {
 830         struct backlight_device *bd;
 831         struct backlight_properties props;
 832
 833         memset(&props, 0, sizeof(struct backlight_properties));
 834         props.max_brightness = 15;
 835         bd = backlight_device_register(EEEPC_WMI_FILE,
 836                                        &eeepc->platform_device->dev, eeepc,
 837                                        &eeepc_wmi_bl_ops, &props);
 838         if (IS_ERR(bd)) {
 839                 pr_err("Could not register backlight device\n");
 840                 return PTR_ERR(bd);
 841         }
 842
 843         eeepc->backlight_device = bd;
 844
 845         bd->props.brightness = read_brightness(bd);
 846         bd->props.power = FB_BLANK_UNBLANK;
 847         backlight_update_status(bd);
 848
 849         return 0;
 850 }
 851
 852 static void eeepc_wmi_backlight_exit(struct eeepc_wmi *eeepc)
 853 {
 854         if (eeepc->backlight_device)
 855                 backlight_device_unregister(eeepc->backlight_device);
 856
 857         eeepc->backlight_device = NULL;
 858 }
 859
 860 static void eeepc_wmi_notify(u32 value, void *context)
 861 {
 862         struct eeepc_wmi *eeepc = context;
 863         struct acpi_buffer response = { ACPI_ALLOCATE_BUFFER, NULL };
 864         union acpi_object *obj;
 865         acpi_status status;
 866         int code;
 867         int orig_code;
 868
 869         status = wmi_get_event_data(value, &response);
 870         if (status != AE_OK) {
 871                 pr_err("bad event status 0x%x\n", status);
 872                 return;
 873         }
 874
 875         obj = (union acpi_object *)response.pointer;
 876
 877         if (obj && obj->type == ACPI_TYPE_INTEGER) {
 878                 code = obj->integer.value;
 879                 orig_code = code;
 880
 881                 if (code >= NOTIFY_BRNUP_MIN && code <= NOTIFY_BRNUP_MAX)
 882                         code = NOTIFY_BRNUP_MIN;
 883                 else if (code >= NOTIFY_BRNDOWN_MIN &&
 884                          code <= NOTIFY_BRNDOWN_MAX)
 885                         code = NOTIFY_BRNDOWN_MIN;
 886
 887                 if (code == NOTIFY_BRNUP_MIN || code == NOTIFY_BRNDOWN_MIN) {
 888                         if (!acpi_video_backlight_support())
 889                                 eeepc_wmi_backlight_notify(eeepc, orig_code);
 890                 }
 891
 892                 if (!sparse_keymap_report_event(eeepc->inputdev,
 893                                                 code, 1, true))
 894                         pr_info("Unknown key %x pressed\n", code);
 895         }
 896
 897         kfree(obj);
 898 }
 899
 900 static ssize_t store_cpufv(struct device *dev, struct device_attribute *attr,
 901                            const char *buf, size_t count)
 902 {
 903         int value;
 904         struct acpi_buffer input = { (acpi_size)sizeof(value), &value };
 905         acpi_status status;
 906
 907         if (!count || sscanf(buf, "%i", &value) != 1)
 908                 return -EINVAL;
 909         if (value < 0 || value > 2)
 910                 return -EINVAL;
 911
 912         status = wmi_evaluate_method(EEEPC_WMI_MGMT_GUID,
 913                                      1, EEEPC_WMI_METHODID_CFVS, &input, NULL);
 914
 915         if (ACPI_FAILURE(status))
 916                 return -EIO;
 917         else
 918                 return count;
 919 }
 920
 921 static DEVICE_ATTR(cpufv, S_IRUGO | S_IWUSR, NULL, store_cpufv);
 922
 923 static struct attribute *platform_attributes[] = {
 924         &dev_attr_cpufv.attr,
 925         NULL
 926 };
 927
 928 static struct attribute_group platform_attribute_group = {
 929         .attrs = platform_attributes
 930 };
 931
 932 static void eeepc_wmi_sysfs_exit(struct platform_device *device)
 933 {
 934         sysfs_remove_group(&device->dev.kobj, &platform_attribute_group);
 935 }
 936
 937 static int eeepc_wmi_sysfs_init(struct platform_device *device)
 938 {
 939         return sysfs_create_group(&device->dev.kobj, &platform_attribute_group);
 940 }
 941
 942 /*
 943  * Platform device
 944  */
 945 static int __init eeepc_wmi_platform_init(struct eeepc_wmi *eeepc)
 946 {
 947         int err;
 948
 949         eeepc->platform_device = platform_device_alloc(EEEPC_WMI_FILE, -1);
 950         if (!eeepc->platform_device)
 951                 return -ENOMEM;
 952         platform_set_drvdata(eeepc->platform_device, eeepc);
 953
 954         err = platform_device_add(eeepc->platform_device);
 955         if (err)
 956                 goto fail_platform_device;
 957
 958         err = eeepc_wmi_sysfs_init(eeepc->platform_device);
 959         if (err)
 960                 goto fail_sysfs;
 961         return 0;
 962
 963 fail_sysfs:
 964         platform_device_del(eeepc->platform_device);
 965 fail_platform_device:
 966         platform_device_put(eeepc->platform_device);
 967         return err;
 968 }
 969
 970 static void eeepc_wmi_platform_exit(struct eeepc_wmi *eeepc)
 971 {
 972         eeepc_wmi_sysfs_exit(eeepc->platform_device);
 973         platform_device_unregister(eeepc->platform_device);
 974 }
 975
 976 /*
 977  * debugfs
 978  */
 979 struct eeepc_wmi_debugfs_node {
 980         struct eeepc_wmi *eeepc;
 981         char *name;
 982         int (*show)(struct seq_file *m, void *data);
 983 };
 984
 985 static int show_dsts(struct seq_file *m, void *data)
 986 {
 987         struct eeepc_wmi *eeepc = m->private;
 988         acpi_status status;
 989         u32 retval = -1;
 990
 991         status = eeepc_wmi_get_devstate(eeepc->debug.dev_id, &retval);
 992
 993         if (ACPI_FAILURE(status))
 994                 return -EIO;
 995
 996         seq_printf(m, "DSTS(%x) = %x\n", eeepc->debug.dev_id, retval);
 997
 998         return 0;
 999 }
1000
1001 static int show_devs(struct seq_file *m, void *data)
1002 {
1003         struct eeepc_wmi *eeepc = m->private;
1004         acpi_status status;
1005         u32 retval = -1;
1006
1007         status = eeepc_wmi_set_devstate(eeepc->debug.dev_id,
1008                                         eeepc->debug.ctrl_param, &retval);
1009         if (ACPI_FAILURE(status))
1010                 return -EIO;
1011
1012         seq_printf(m, "DEVS(%x, %x) = %x\n", eeepc->debug.dev_id,
1013                    eeepc->debug.ctrl_param, retval);
1014
1015         return 0;
1016 }
1017
1018 static struct eeepc_wmi_debugfs_node eeepc_wmi_debug_files[] = {
1019         { NULL, "devs", show_devs },
1020         { NULL, "dsts", show_dsts },
1021 };
1022
1023 static int eeepc_wmi_debugfs_open(struct inode *inode, struct file *file)
1024 {
1025         struct eeepc_wmi_debugfs_node *node = inode->i_private;
1026
1027         return single_open(file, node->show, node->eeepc);
1028 }
1029
1030 static const struct file_operations eeepc_wmi_debugfs_io_ops = {
1031         .owner = THIS_MODULE,
1032         .open  = eeepc_wmi_debugfs_open,
1033         .read = seq_read,
1034         .llseek = seq_lseek,
1035         .release = single_release,
1036 };
1037
1038 static void eeepc_wmi_debugfs_exit(struct eeepc_wmi *eeepc)
1039 {
1040         debugfs_remove_recursive(eeepc->debug.root);
1041 }
1042
1043 static int eeepc_wmi_debugfs_init(struct eeepc_wmi *eeepc)
1044 {
1045         struct dentry *dent;
1046         int i;
1047
1048         eeepc->debug.root = debugfs_create_dir(EEEPC_WMI_FILE, NULL);
1049         if (!eeepc->debug.root) {
1050                 pr_err("failed to create debugfs directory");
1051                 goto error_debugfs;
1052         }
1053
1054         dent = debugfs_create_x32("dev_id", S_IRUGO|S_IWUSR,
1055                                   eeepc->debug.root, &eeepc->debug.dev_id);
1056         if (!dent)
1057                 goto error_debugfs;
1058
1059         dent = debugfs_create_x32("ctrl_param", S_IRUGO|S_IWUSR,
1060                                   eeepc->debug.root, &eeepc->debug.ctrl_param);
1061         if (!dent)
1062                 goto error_debugfs;
1063
1064         for (i = 0; i < ARRAY_SIZE(eeepc_wmi_debug_files); i++) {
1065                 struct eeepc_wmi_debugfs_node *node = &eeepc_wmi_debug_files[i];
1066
1067                 node->eeepc = eeepc;
1068                 dent = debugfs_create_file(node->name, S_IFREG | S_IRUGO,
1069                                            eeepc->debug.root, node,
1070                                            &eeepc_wmi_debugfs_io_ops);
1071                 if (!dent) {
1072                         pr_err("failed to create debug file: %s\n", node->name);
1073                         goto error_debugfs;
1074                 }
1075         }
1076
1077         return 0;
1078
1079 error_debugfs:
1080         eeepc_wmi_debugfs_exit(eeepc);
1081         return -ENOMEM;
1082 }
1083
1084 /*
1085  * WMI Driver
1086  */
1087 static void eeepc_dmi_check(struct eeepc_wmi *eeepc)
1088 {
1089         const char *model;
1090
1091         model = dmi_get_system_info(DMI_PRODUCT_NAME);
1092         if (!model)
1093                 return;
1094
1095         /*
1096          * Whitelist for wlan hotplug
1097          *
1098          * Eeepc 1000H needs the current hotplug code to handle
1099          * Fn+F2 correctly. We may add other Eeepc here later, but
1100          * it seems that most of the laptops supported by eeepc-wmi
1101          * don't need to be on this list
1102          */
1103         if (strcmp(model, "1000H") == 0) {
1104                 eeepc->hotplug_wireless = true;
1105                 pr_info("wlan hotplug enabled\n");
1106         }
1107 }
1108
1109 static struct platform_device * __init eeepc_wmi_add(void)
1110 {
1111         struct eeepc_wmi *eeepc;
1112         acpi_status status;
1113         int err;
1114
1115         eeepc = kzalloc(sizeof(struct eeepc_wmi), GFP_KERNEL);
1116         if (!eeepc)
1117                 return ERR_PTR(-ENOMEM);
1118
1119         eeepc->hotplug_wireless = hotplug_wireless;
1120         eeepc_dmi_check(eeepc);
1121
1122         /*
1123          * Register the platform device first.  It is used as a parent for the
1124          * sub-devices below.
1125          */
1126         err = eeepc_wmi_platform_init(eeepc);
1127         if (err)
1128                 goto fail_platform;
1129
1130         err = eeepc_wmi_input_init(eeepc);
1131         if (err)
1132                 goto fail_input;
1133
1134         err = eeepc_wmi_led_init(eeepc);
1135         if (err)
1136                 goto fail_leds;
1137
1138         err = eeepc_wmi_rfkill_init(eeepc);
1139         if (err)
1140                 goto fail_rfkill;
1141
1142         if (!acpi_video_backlight_support()) {
1143                 err = eeepc_wmi_backlight_init(eeepc);
1144                 if (err)
1145                         goto fail_backlight;
1146         } else
1147                 pr_info("Backlight controlled by ACPI video driver\n");
1148
1149         status = wmi_install_notify_handler(EEEPC_WMI_EVENT_GUID,
1150                                             eeepc_wmi_notify, eeepc);
1151         if (ACPI_FAILURE(status)) {
1152                 pr_err("Unable to register notify handler - %d\n",
1153                         status);
1154                 err = -ENODEV;
1155                 goto fail_wmi_handler;
1156         }
1157
1158         err = eeepc_wmi_debugfs_init(eeepc);
1159         if (err)
1160                 goto fail_debugfs;
1161
1162         return eeepc->platform_device;
1163
1164 fail_debugfs:
1165         wmi_remove_notify_handler(EEEPC_WMI_EVENT_GUID);
1166 fail_wmi_handler:
1167         eeepc_wmi_backlight_exit(eeepc);
1168 fail_backlight:
1169         eeepc_wmi_rfkill_exit(eeepc);
1170 fail_rfkill:
1171         eeepc_wmi_led_exit(eeepc);
1172 fail_leds:
1173         eeepc_wmi_input_exit(eeepc);
1174 fail_input:
1175         eeepc_wmi_platform_exit(eeepc);
1176 fail_platform:
1177         kfree(eeepc);
1178         return ERR_PTR(err);
1179 }
1180
1181 static int eeepc_wmi_remove(struct platform_device *device)
1182 {
1183         struct eeepc_wmi *eeepc;
1184
1185         eeepc = platform_get_drvdata(device);
1186         wmi_remove_notify_handler(EEEPC_WMI_EVENT_GUID);
1187         eeepc_wmi_backlight_exit(eeepc);
1188         eeepc_wmi_input_exit(eeepc);
1189         eeepc_wmi_led_exit(eeepc);
1190         eeepc_wmi_rfkill_exit(eeepc);
1191         eeepc_wmi_debugfs_exit(eeepc);
1192         eeepc_wmi_platform_exit(eeepc);
1193
1194         kfree(eeepc);
1195         return 0;
1196 }
1197
1198 static struct platform_driver platform_driver = {
1199         .driver = {
1200                 .name = EEEPC_WMI_FILE,
1201                 .owner = THIS_MODULE,
1202         },
1203 };
1204
1205 static acpi_status __init eeepc_wmi_parse_device(acpi_handle handle, u32 level,
1206                                                  void *context, void **retval)
1207 {
1208         pr_warning("Found legacy ATKD device (%s)", EEEPC_ACPI_HID);
1209         *(bool *)context = true;
1210         return AE_CTRL_TERMINATE;
1211 }
1212
1213 static int __init eeepc_wmi_check_atkd(void)
1214 {
1215         acpi_status status;
1216         bool found = false;
1217
1218         status = acpi_get_devices(EEEPC_ACPI_HID, eeepc_wmi_parse_device,
1219                                   &found, NULL);
1220
1221         if (ACPI_FAILURE(status) || !found)
1222                 return 0;
1223         return -1;
1224 }
1225
1226 static int __init eeepc_wmi_init(void)
1227 {
1228         int err;
1229
1230         if (!wmi_has_guid(EEEPC_WMI_EVENT_GUID) ||
1231             !wmi_has_guid(EEEPC_WMI_MGMT_GUID)) {
1232                 pr_warning("No known WMI GUID found\n");
1233                 return -ENODEV;
1234         }
1235
1236         if (eeepc_wmi_check_atkd()) {
1237                 pr_warning("WMI device present, but legacy ATKD device is also "
1238                            "present and enabled.");
1239                 pr_warning("You probably booted with acpi_osi=\"Linux\" or "
1240                            "acpi_osi=\"!Windows 2009\"");
1241                 pr_warning("Can't load eeepc-wmi, use default acpi_osi "
1242                            "(preferred) or eeepc-laptop");
1243                 return -ENODEV;
1244         }
1245
1246         platform_device = eeepc_wmi_add();
1247         if (IS_ERR(platform_device)) {
1248                 err = PTR_ERR(platform_device);
1249                 goto fail_eeepc_wmi;
1250         }
1251
1252         err = platform_driver_register(&platform_driver);
1253         if (err) {
1254                 pr_warning("Unable to register platform driver\n");
1255                 goto fail_platform_driver;
1256         }
1257
1258         return 0;
1259
1260 fail_platform_driver:
1261         eeepc_wmi_remove(platform_device);
1262 fail_eeepc_wmi:
1263         return err;
1264 }
1265
1266 static void __exit eeepc_wmi_exit(void)
1267 {
1268         eeepc_wmi_remove(platform_device);
1269         platform_driver_unregister(&platform_driver);
1270 }
1271
1272 module_init(eeepc_wmi_init);
1273 module_exit(eeepc_wmi_exit);