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
 141         struct eeepc_wmi_debug debug;
 142 };
 143
 144 /* Only used in eeepc_wmi_init() and eeepc_wmi_exit() */
 145 static struct platform_device *platform_device;
 146
 147 static int eeepc_wmi_input_init(struct eeepc_wmi *eeepc)
 148 {
 149         int err;
 150
 151         eeepc->inputdev = input_allocate_device();
 152         if (!eeepc->inputdev)
 153                 return -ENOMEM;
 154
 155         eeepc->inputdev->name = "Eee PC WMI hotkeys";
 156         eeepc->inputdev->phys = EEEPC_WMI_FILE "/input0";
 157         eeepc->inputdev->id.bustype = BUS_HOST;
 158         eeepc->inputdev->dev.parent = &eeepc->platform_device->dev;
 159
 160         err = sparse_keymap_setup(eeepc->inputdev, eeepc_wmi_keymap, NULL);
 161         if (err)
 162                 goto err_free_dev;
 163
 164         err = input_register_device(eeepc->inputdev);
 165         if (err)
 166                 goto err_free_keymap;
 167
 168         return 0;
 169
 170 err_free_keymap:
 171         sparse_keymap_free(eeepc->inputdev);
 172 err_free_dev:
 173         input_free_device(eeepc->inputdev);
 174         return err;
 175 }
 176
 177 static void eeepc_wmi_input_exit(struct eeepc_wmi *eeepc)
 178 {
 179         if (eeepc->inputdev) {
 180                 sparse_keymap_free(eeepc->inputdev);
 181                 input_unregister_device(eeepc->inputdev);
 182         }
 183
 184         eeepc->inputdev = NULL;
 185 }
 186
 187 static acpi_status eeepc_wmi_get_devstate(u32 dev_id, u32 *retval)
 188 {
 189         struct acpi_buffer input = { (acpi_size)sizeof(u32), &dev_id };
 190         struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
 191         union acpi_object *obj;
 192         acpi_status status;
 193         u32 tmp;
 194
 195         status = wmi_evaluate_method(EEEPC_WMI_MGMT_GUID,
 196                                      1, EEEPC_WMI_METHODID_DSTS,
 197                                      &input, &output);
 198
 199         if (ACPI_FAILURE(status))
 200                 return status;
 201
 202         obj = (union acpi_object *)output.pointer;
 203         if (obj && obj->type == ACPI_TYPE_INTEGER)
 204                 tmp = (u32)obj->integer.value;
 205         else
 206                 tmp = 0;
 207
 208         if (retval)
 209                 *retval = tmp;
 210
 211         kfree(obj);
 212
 213         return status;
 214
 215 }
 216
 217 static acpi_status eeepc_wmi_set_devstate(u32 dev_id, u32 ctrl_param,
 218                                           u32 *retval)
 219 {
 220         struct bios_args args = {
 221                 .dev_id = dev_id,
 222                 .ctrl_param = ctrl_param,
 223         };
 224         struct acpi_buffer input = { (acpi_size)sizeof(args), &args };
 225         acpi_status status;
 226
 227         if (!retval) {
 228                 status = wmi_evaluate_method(EEEPC_WMI_MGMT_GUID, 1,
 229                                              EEEPC_WMI_METHODID_DEVS,
 230                                              &input, NULL);
 231         } else {
 232                 struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
 233                 union acpi_object *obj;
 234                 u32 tmp;
 235
 236                 status = wmi_evaluate_method(EEEPC_WMI_MGMT_GUID, 1,
 237                                              EEEPC_WMI_METHODID_DEVS,
 238                                              &input, &output);
 239
 240                 if (ACPI_FAILURE(status))
 241                         return status;
 242
 243                 obj = (union acpi_object *)output.pointer;
 244                 if (obj && obj->type == ACPI_TYPE_INTEGER)
 245                         tmp = (u32)obj->integer.value;
 246                 else
 247                         tmp = 0;
 248
 249                 *retval = tmp;
 250
 251                 kfree(obj);
 252         }
 253
 254         return status;
 255 }
 256
 257 /*
 258  * LEDs
 259  */
 260 /*
 261  * These functions actually update the LED's, and are called from a
 262  * workqueue. By doing this as separate work rather than when the LED
 263  * subsystem asks, we avoid messing with the Eeepc ACPI stuff during a
 264  * potentially bad time, such as a timer interrupt.
 265  */
 266 static void tpd_led_update(struct work_struct *work)
 267 {
 268         int ctrl_param;
 269         struct eeepc_wmi *eeepc;
 270
 271         eeepc = container_of(work, struct eeepc_wmi, tpd_led_work);
 272
 273         ctrl_param = eeepc->tpd_led_wk;
 274         eeepc_wmi_set_devstate(EEEPC_WMI_DEVID_TPDLED, ctrl_param, NULL);
 275 }
 276
 277 static void tpd_led_set(struct led_classdev *led_cdev,
 278                         enum led_brightness value)
 279 {
 280         struct eeepc_wmi *eeepc;
 281
 282         eeepc = container_of(led_cdev, struct eeepc_wmi, tpd_led);
 283
 284         eeepc->tpd_led_wk = !!value;
 285         queue_work(eeepc->led_workqueue, &eeepc->tpd_led_work);
 286 }
 287
 288 static int read_tpd_state(struct eeepc_wmi *eeepc)
 289 {
 290         u32 retval;
 291         acpi_status status;
 292
 293         status = eeepc_wmi_get_devstate(EEEPC_WMI_DEVID_TPDLED, &retval);
 294
 295         if (ACPI_FAILURE(status))
 296                 return -1;
 297         else if (!retval || retval == 0x00060000)
 298                 /*
 299                  * if touchpad led is present, DSTS will set some bits,
 300                  * usually 0x00020000.
 301                  * 0x00060000 means that the device is not supported
 302                  */
 303                 return -ENODEV;
 304         else
 305                 /* Status is stored in the first bit */
 306                 return retval & 0x1;
 307 }
 308
 309 static enum led_brightness tpd_led_get(struct led_classdev *led_cdev)
 310 {
 311         struct eeepc_wmi *eeepc;
 312
 313         eeepc = container_of(led_cdev, struct eeepc_wmi, tpd_led);
 314
 315         return read_tpd_state(eeepc);
 316 }
 317
 318 static int eeepc_wmi_led_init(struct eeepc_wmi *eeepc)
 319 {
 320         int rv;
 321
 322         if (read_tpd_state(eeepc) < 0)
 323                 return 0;
 324
 325         eeepc->led_workqueue = create_singlethread_workqueue("led_workqueue");
 326         if (!eeepc->led_workqueue)
 327                 return -ENOMEM;
 328         INIT_WORK(&eeepc->tpd_led_work, tpd_led_update);
 329
 330         eeepc->tpd_led.name = "eeepc::touchpad";
 331         eeepc->tpd_led.brightness_set = tpd_led_set;
 332         eeepc->tpd_led.brightness_get = tpd_led_get;
 333         eeepc->tpd_led.max_brightness = 1;
 334
 335         rv = led_classdev_register(&eeepc->platform_device->dev,
 336                                    &eeepc->tpd_led);
 337         if (rv) {
 338                 destroy_workqueue(eeepc->led_workqueue);
 339                 return rv;
 340         }
 341
 342         return 0;
 343 }
 344
 345 static void eeepc_wmi_led_exit(struct eeepc_wmi *eeepc)
 346 {
 347         if (eeepc->tpd_led.dev)
 348                 led_classdev_unregister(&eeepc->tpd_led);
 349         if (eeepc->led_workqueue)
 350                 destroy_workqueue(eeepc->led_workqueue);
 351 }
 352
 353 /*
 354  * PCI hotplug (for wlan rfkill)
 355  */
 356 static bool eeepc_wlan_rfkill_blocked(struct eeepc_wmi *eeepc)
 357 {
 358         u32 retval;
 359         acpi_status status;
 360
 361         status = eeepc_wmi_get_devstate(EEEPC_WMI_DEVID_WLAN, &retval);
 362
 363         if (ACPI_FAILURE(status))
 364                 return false;
 365
 366         return !(retval & 0x1);
 367 }
 368
 369 static void eeepc_rfkill_hotplug(struct eeepc_wmi *eeepc)
 370 {
 371         struct pci_dev *dev;
 372         struct pci_bus *bus;
 373         bool blocked = eeepc_wlan_rfkill_blocked(eeepc);
 374         bool absent;
 375         u32 l;
 376
 377         if (eeepc->wlan_rfkill)
 378                 rfkill_set_sw_state(eeepc->wlan_rfkill, blocked);
 379
 380         mutex_lock(&eeepc->hotplug_lock);
 381
 382         if (eeepc->hotplug_slot) {
 383                 bus = pci_find_bus(0, 1);
 384                 if (!bus) {
 385                         pr_warning("Unable to find PCI bus 1?\n");
 386                         goto out_unlock;
 387                 }
 388
 389                 if (pci_bus_read_config_dword(bus, 0, PCI_VENDOR_ID, &l)) {
 390                         pr_err("Unable to read PCI config space?\n");
 391                         goto out_unlock;
 392                 }
 393                 absent = (l == 0xffffffff);
 394
 395                 if (blocked != absent) {
 396                         pr_warning("BIOS says wireless lan is %s, "
 397                                         "but the pci device is %s\n",
 398                                 blocked ? "blocked" : "unblocked",
 399                                 absent ? "absent" : "present");
 400                         pr_warning("skipped wireless hotplug as probably "
 401                                         "inappropriate for this model\n");
 402                         goto out_unlock;
 403                 }
 404
 405                 if (!blocked) {
 406                         dev = pci_get_slot(bus, 0);
 407                         if (dev) {
 408                                 /* Device already present */
 409                                 pci_dev_put(dev);
 410                                 goto out_unlock;
 411                         }
 412                         dev = pci_scan_single_device(bus, 0);
 413                         if (dev) {
 414                                 pci_bus_assign_resources(bus);
 415                                 if (pci_bus_add_device(dev))
 416                                         pr_err("Unable to hotplug wifi\n");
 417                         }
 418                 } else {
 419                         dev = pci_get_slot(bus, 0);
 420                         if (dev) {
 421                                 pci_remove_bus_device(dev);
 422                                 pci_dev_put(dev);
 423                         }
 424                 }
 425         }
 426
 427 out_unlock:
 428         mutex_unlock(&eeepc->hotplug_lock);
 429 }
 430
 431 static void eeepc_rfkill_notify(acpi_handle handle, u32 event, void *data)
 432 {
 433         struct eeepc_wmi *eeepc = data;
 434
 435         if (event != ACPI_NOTIFY_BUS_CHECK)
 436                 return;
 437
 438         eeepc_rfkill_hotplug(eeepc);
 439 }
 440
 441 static int eeepc_register_rfkill_notifier(struct eeepc_wmi *eeepc,
 442                                           char *node)
 443 {
 444         acpi_status status;
 445         acpi_handle handle;
 446
 447         status = acpi_get_handle(NULL, node, &handle);
 448
 449         if (ACPI_SUCCESS(status)) {
 450                 status = acpi_install_notify_handler(handle,
 451                                                      ACPI_SYSTEM_NOTIFY,
 452                                                      eeepc_rfkill_notify,
 453                                                      eeepc);
 454                 if (ACPI_FAILURE(status))
 455                         pr_warning("Failed to register notify on %s\n", node);
 456         } else
 457                 return -ENODEV;
 458
 459         return 0;
 460 }
 461
 462 static void eeepc_unregister_rfkill_notifier(struct eeepc_wmi *eeepc,
 463                                              char *node)
 464 {
 465         acpi_status status = AE_OK;
 466         acpi_handle handle;
 467
 468         status = acpi_get_handle(NULL, node, &handle);
 469
 470         if (ACPI_SUCCESS(status)) {
 471                 status = acpi_remove_notify_handler(handle,
 472                                                      ACPI_SYSTEM_NOTIFY,
 473                                                      eeepc_rfkill_notify);
 474                 if (ACPI_FAILURE(status))
 475                         pr_err("Error removing rfkill notify handler %s\n",
 476                                 node);
 477         }
 478 }
 479
 480 static int eeepc_get_adapter_status(struct hotplug_slot *hotplug_slot,
 481                                     u8 *value)
 482 {
 483         u32 retval;
 484         acpi_status status;
 485
 486         status = eeepc_wmi_get_devstate(EEEPC_WMI_DEVID_WLAN, &retval);
 487
 488         if (ACPI_FAILURE(status))
 489                 return -EIO;
 490
 491         if (!retval || retval == 0x00060000)
 492                 return -ENODEV;
 493         else
 494                 *value = (retval & 0x1);
 495
 496         return 0;
 497 }
 498
 499 static void eeepc_cleanup_pci_hotplug(struct hotplug_slot *hotplug_slot)
 500 {
 501         kfree(hotplug_slot->info);
 502         kfree(hotplug_slot);
 503 }
 504
 505 static struct hotplug_slot_ops eeepc_hotplug_slot_ops = {
 506         .owner = THIS_MODULE,
 507         .get_adapter_status = eeepc_get_adapter_status,
 508         .get_power_status = eeepc_get_adapter_status,
 509 };
 510
 511 static int eeepc_setup_pci_hotplug(struct eeepc_wmi *eeepc)
 512 {
 513         int ret = -ENOMEM;
 514         struct pci_bus *bus = pci_find_bus(0, 1);
 515
 516         if (!bus) {
 517                 pr_err("Unable to find wifi PCI bus\n");
 518                 return -ENODEV;
 519         }
 520
 521         eeepc->hotplug_slot = kzalloc(sizeof(struct hotplug_slot), GFP_KERNEL);
 522         if (!eeepc->hotplug_slot)
 523                 goto error_slot;
 524
 525         eeepc->hotplug_slot->info = kzalloc(sizeof(struct hotplug_slot_info),
 526                                             GFP_KERNEL);
 527         if (!eeepc->hotplug_slot->info)
 528                 goto error_info;
 529
 530         eeepc->hotplug_slot->private = eeepc;
 531         eeepc->hotplug_slot->release = &eeepc_cleanup_pci_hotplug;
 532         eeepc->hotplug_slot->ops = &eeepc_hotplug_slot_ops;
 533         eeepc_get_adapter_status(eeepc->hotplug_slot,
 534                                  &eeepc->hotplug_slot->info->adapter_status);
 535
 536         ret = pci_hp_register(eeepc->hotplug_slot, bus, 0, "eeepc-wifi");
 537         if (ret) {
 538                 pr_err("Unable to register hotplug slot - %d\n", ret);
 539                 goto error_register;
 540         }
 541
 542         return 0;
 543
 544 error_register:
 545         kfree(eeepc->hotplug_slot->info);
 546 error_info:
 547         kfree(eeepc->hotplug_slot);
 548         eeepc->hotplug_slot = NULL;
 549 error_slot:
 550         return ret;
 551 }
 552
 553 /*
 554  * Rfkill devices
 555  */
 556 static int eeepc_rfkill_set(void *data, bool blocked)
 557 {
 558         int dev_id = (unsigned long)data;
 559         u32 ctrl_param = !blocked;
 560
 561         return eeepc_wmi_set_devstate(dev_id, ctrl_param, NULL);
 562 }
 563
 564 static void eeepc_rfkill_query(struct rfkill *rfkill, void *data)
 565 {
 566         int dev_id = (unsigned long)data;
 567         u32 retval;
 568         acpi_status status;
 569
 570         status = eeepc_wmi_get_devstate(dev_id, &retval);
 571
 572         if (ACPI_FAILURE(status))
 573                 return ;
 574
 575         rfkill_set_sw_state(rfkill, !(retval & 0x1));
 576 }
 577
 578 static const struct rfkill_ops eeepc_rfkill_ops = {
 579         .set_block = eeepc_rfkill_set,
 580         .query = eeepc_rfkill_query,
 581 };
 582
 583 static int eeepc_new_rfkill(struct eeepc_wmi *eeepc,
 584                             struct rfkill **rfkill,
 585                             const char *name,
 586                             enum rfkill_type type, int dev_id)
 587 {
 588         int result;
 589         u32 retval;
 590         acpi_status status;
 591
 592         status = eeepc_wmi_get_devstate(dev_id, &retval);
 593
 594         if (ACPI_FAILURE(status))
 595                 return -1;
 596
 597         /* If the device is present, DSTS will always set some bits
 598          * 0x00070000 - 1110000000000000000 - device supported
 599          * 0x00060000 - 1100000000000000000 - not supported
 600          * 0x00020000 - 0100000000000000000 - device supported
 601          * 0x00010000 - 0010000000000000000 - not supported / special mode ?
 602          */
 603         if (!retval || retval == 0x00060000)
 604                 return -ENODEV;
 605
 606         *rfkill = rfkill_alloc(name, &eeepc->platform_device->dev, type,
 607                                &eeepc_rfkill_ops, (void *)(long)dev_id);
 608
 609         if (!*rfkill)
 610                 return -EINVAL;
 611
 612         rfkill_init_sw_state(*rfkill, !(retval & 0x1));
 613         result = rfkill_register(*rfkill);
 614         if (result) {
 615                 rfkill_destroy(*rfkill);
 616                 *rfkill = NULL;
 617                 return result;
 618         }
 619         return 0;
 620 }
 621
 622 static void eeepc_wmi_rfkill_exit(struct eeepc_wmi *eeepc)
 623 {
 624         eeepc_unregister_rfkill_notifier(eeepc, "\\_SB.PCI0.P0P5");
 625         eeepc_unregister_rfkill_notifier(eeepc, "\\_SB.PCI0.P0P6");
 626         eeepc_unregister_rfkill_notifier(eeepc, "\\_SB.PCI0.P0P7");
 627         if (eeepc->wlan_rfkill) {
 628                 rfkill_unregister(eeepc->wlan_rfkill);
 629                 rfkill_destroy(eeepc->wlan_rfkill);
 630                 eeepc->wlan_rfkill = NULL;
 631         }
 632         /*
 633          * Refresh pci hotplug in case the rfkill state was changed after
 634          * eeepc_unregister_rfkill_notifier()
 635          */
 636         eeepc_rfkill_hotplug(eeepc);
 637         if (eeepc->hotplug_slot)
 638                 pci_hp_deregister(eeepc->hotplug_slot);
 639
 640         if (eeepc->bluetooth_rfkill) {
 641                 rfkill_unregister(eeepc->bluetooth_rfkill);
 642                 rfkill_destroy(eeepc->bluetooth_rfkill);
 643                 eeepc->bluetooth_rfkill = NULL;
 644         }
 645         if (eeepc->wwan3g_rfkill) {
 646                 rfkill_unregister(eeepc->wwan3g_rfkill);
 647                 rfkill_destroy(eeepc->wwan3g_rfkill);
 648                 eeepc->wwan3g_rfkill = NULL;
 649         }
 650 }
 651
 652 static int eeepc_wmi_rfkill_init(struct eeepc_wmi *eeepc)
 653 {
 654         int result = 0;
 655
 656         mutex_init(&eeepc->hotplug_lock);
 657
 658         result = eeepc_new_rfkill(eeepc, &eeepc->wlan_rfkill,
 659                                   "eeepc-wlan", RFKILL_TYPE_WLAN,
 660                                   EEEPC_WMI_DEVID_WLAN);
 661
 662         if (result && result != -ENODEV)
 663                 goto exit;
 664
 665         result = eeepc_new_rfkill(eeepc, &eeepc->bluetooth_rfkill,
 666                                   "eeepc-bluetooth", RFKILL_TYPE_BLUETOOTH,
 667                                   EEEPC_WMI_DEVID_BLUETOOTH);
 668
 669         if (result && result != -ENODEV)
 670                 goto exit;
 671
 672         result = eeepc_new_rfkill(eeepc, &eeepc->wwan3g_rfkill,
 673                                   "eeepc-wwan3g", RFKILL_TYPE_WWAN,
 674                                   EEEPC_WMI_DEVID_WWAN3G);
 675
 676         if (result && result != -ENODEV)
 677                 goto exit;
 678
 679         result = eeepc_setup_pci_hotplug(eeepc);
 680         /*
 681          * If we get -EBUSY then something else is handling the PCI hotplug -
 682          * don't fail in this case
 683          */
 684         if (result == -EBUSY)
 685                 result = 0;
 686
 687         eeepc_register_rfkill_notifier(eeepc, "\\_SB.PCI0.P0P5");
 688         eeepc_register_rfkill_notifier(eeepc, "\\_SB.PCI0.P0P6");
 689         eeepc_register_rfkill_notifier(eeepc, "\\_SB.PCI0.P0P7");
 690         /*
 691          * Refresh pci hotplug in case the rfkill state was changed during
 692          * setup.
 693          */
 694         eeepc_rfkill_hotplug(eeepc);
 695
 696 exit:
 697         if (result && result != -ENODEV)
 698                 eeepc_wmi_rfkill_exit(eeepc);
 699
 700         if (result == -ENODEV)
 701                 result = 0;
 702
 703         return result;
 704 }
 705
 706 /*
 707  * Backlight
 708  */
 709 static int read_brightness(struct backlight_device *bd)
 710 {
 711         u32 retval;
 712         acpi_status status;
 713
 714         status = eeepc_wmi_get_devstate(EEEPC_WMI_DEVID_BACKLIGHT, &retval);
 715
 716         if (ACPI_FAILURE(status))
 717                 return -1;
 718         else
 719                 return retval & 0xFF;
 720 }
 721
 722 static int update_bl_status(struct backlight_device *bd)
 723 {
 724
 725         u32 ctrl_param;
 726         acpi_status status;
 727
 728         ctrl_param = bd->props.brightness;
 729
 730         status = eeepc_wmi_set_devstate(EEEPC_WMI_DEVID_BACKLIGHT,
 731                                         ctrl_param, NULL);
 732
 733         if (ACPI_FAILURE(status))
 734                 return -1;
 735         else
 736                 return 0;
 737 }
 738
 739 static const struct backlight_ops eeepc_wmi_bl_ops = {
 740         .get_brightness = read_brightness,
 741         .update_status = update_bl_status,
 742 };
 743
 744 static int eeepc_wmi_backlight_notify(struct eeepc_wmi *eeepc, int code)
 745 {
 746         struct backlight_device *bd = eeepc->backlight_device;
 747         int old = bd->props.brightness;
 748         int new = old;
 749
 750         if (code >= NOTIFY_BRNUP_MIN && code <= NOTIFY_BRNUP_MAX)
 751                 new = code - NOTIFY_BRNUP_MIN + 1;
 752         else if (code >= NOTIFY_BRNDOWN_MIN && code <= NOTIFY_BRNDOWN_MAX)
 753                 new = code - NOTIFY_BRNDOWN_MIN;
 754
 755         bd->props.brightness = new;
 756         backlight_update_status(bd);
 757         backlight_force_update(bd, BACKLIGHT_UPDATE_HOTKEY);
 758
 759         return old;
 760 }
 761
 762 static int eeepc_wmi_backlight_init(struct eeepc_wmi *eeepc)
 763 {
 764         struct backlight_device *bd;
 765         struct backlight_properties props;
 766
 767         memset(&props, 0, sizeof(struct backlight_properties));
 768         props.max_brightness = 15;
 769         bd = backlight_device_register(EEEPC_WMI_FILE,
 770                                        &eeepc->platform_device->dev, eeepc,
 771                                        &eeepc_wmi_bl_ops, &props);
 772         if (IS_ERR(bd)) {
 773                 pr_err("Could not register backlight device\n");
 774                 return PTR_ERR(bd);
 775         }
 776
 777         eeepc->backlight_device = bd;
 778
 779         bd->props.brightness = read_brightness(bd);
 780         bd->props.power = FB_BLANK_UNBLANK;
 781         backlight_update_status(bd);
 782
 783         return 0;
 784 }
 785
 786 static void eeepc_wmi_backlight_exit(struct eeepc_wmi *eeepc)
 787 {
 788         if (eeepc->backlight_device)
 789                 backlight_device_unregister(eeepc->backlight_device);
 790
 791         eeepc->backlight_device = NULL;
 792 }
 793
 794 static void eeepc_wmi_notify(u32 value, void *context)
 795 {
 796         struct eeepc_wmi *eeepc = context;
 797         struct acpi_buffer response = { ACPI_ALLOCATE_BUFFER, NULL };
 798         union acpi_object *obj;
 799         acpi_status status;
 800         int code;
 801         int orig_code;
 802
 803         status = wmi_get_event_data(value, &response);
 804         if (status != AE_OK) {
 805                 pr_err("bad event status 0x%x\n", status);
 806                 return;
 807         }
 808
 809         obj = (union acpi_object *)response.pointer;
 810
 811         if (obj && obj->type == ACPI_TYPE_INTEGER) {
 812                 code = obj->integer.value;
 813                 orig_code = code;
 814
 815                 if (code >= NOTIFY_BRNUP_MIN && code <= NOTIFY_BRNUP_MAX)
 816                         code = NOTIFY_BRNUP_MIN;
 817                 else if (code >= NOTIFY_BRNDOWN_MIN &&
 818                          code <= NOTIFY_BRNDOWN_MAX)
 819                         code = NOTIFY_BRNDOWN_MIN;
 820
 821                 if (code == NOTIFY_BRNUP_MIN || code == NOTIFY_BRNDOWN_MIN) {
 822                         if (!acpi_video_backlight_support())
 823                                 eeepc_wmi_backlight_notify(eeepc, orig_code);
 824                 }
 825
 826                 if (!sparse_keymap_report_event(eeepc->inputdev,
 827                                                 code, 1, true))
 828                         pr_info("Unknown key %x pressed\n", code);
 829         }
 830
 831         kfree(obj);
 832 }
 833
 834 static ssize_t store_cpufv(struct device *dev, struct device_attribute *attr,
 835                            const char *buf, size_t count)
 836 {
 837         int value;
 838         struct acpi_buffer input = { (acpi_size)sizeof(value), &value };
 839         acpi_status status;
 840
 841         if (!count || sscanf(buf, "%i", &value) != 1)
 842                 return -EINVAL;
 843         if (value < 0 || value > 2)
 844                 return -EINVAL;
 845
 846         status = wmi_evaluate_method(EEEPC_WMI_MGMT_GUID,
 847                                      1, EEEPC_WMI_METHODID_CFVS, &input, NULL);
 848
 849         if (ACPI_FAILURE(status))
 850                 return -EIO;
 851         else
 852                 return count;
 853 }
 854
 855 static DEVICE_ATTR(cpufv, S_IRUGO | S_IWUSR, NULL, store_cpufv);
 856
 857 static struct attribute *platform_attributes[] = {
 858         &dev_attr_cpufv.attr,
 859         NULL
 860 };
 861
 862 static struct attribute_group platform_attribute_group = {
 863         .attrs = platform_attributes
 864 };
 865
 866 static void eeepc_wmi_sysfs_exit(struct platform_device *device)
 867 {
 868         sysfs_remove_group(&device->dev.kobj, &platform_attribute_group);
 869 }
 870
 871 static int eeepc_wmi_sysfs_init(struct platform_device *device)
 872 {
 873         return sysfs_create_group(&device->dev.kobj, &platform_attribute_group);
 874 }
 875
 876 /*
 877  * Platform device
 878  */
 879 static int __init eeepc_wmi_platform_init(struct eeepc_wmi *eeepc)
 880 {
 881         int err;
 882
 883         eeepc->platform_device = platform_device_alloc(EEEPC_WMI_FILE, -1);
 884         if (!eeepc->platform_device)
 885                 return -ENOMEM;
 886         platform_set_drvdata(eeepc->platform_device, eeepc);
 887
 888         err = platform_device_add(eeepc->platform_device);
 889         if (err)
 890                 goto fail_platform_device;
 891
 892         err = eeepc_wmi_sysfs_init(eeepc->platform_device);
 893         if (err)
 894                 goto fail_sysfs;
 895         return 0;
 896
 897 fail_sysfs:
 898         platform_device_del(eeepc->platform_device);
 899 fail_platform_device:
 900         platform_device_put(eeepc->platform_device);
 901         return err;
 902 }
 903
 904 static void eeepc_wmi_platform_exit(struct eeepc_wmi *eeepc)
 905 {
 906         eeepc_wmi_sysfs_exit(eeepc->platform_device);
 907         platform_device_unregister(eeepc->platform_device);
 908 }
 909
 910 /*
 911  * debugfs
 912  */
 913 struct eeepc_wmi_debugfs_node {
 914         struct eeepc_wmi *eeepc;
 915         char *name;
 916         int (*show)(struct seq_file *m, void *data);
 917 };
 918
 919 static int show_dsts(struct seq_file *m, void *data)
 920 {
 921         struct eeepc_wmi *eeepc = m->private;
 922         acpi_status status;
 923         u32 retval = -1;
 924
 925         status = eeepc_wmi_get_devstate(eeepc->debug.dev_id, &retval);
 926
 927         if (ACPI_FAILURE(status))
 928                 return -EIO;
 929
 930         seq_printf(m, "DSTS(%x) = %x\n", eeepc->debug.dev_id, retval);
 931
 932         return 0;
 933 }
 934
 935 static int show_devs(struct seq_file *m, void *data)
 936 {
 937         struct eeepc_wmi *eeepc = m->private;
 938         acpi_status status;
 939         u32 retval = -1;
 940
 941         status = eeepc_wmi_set_devstate(eeepc->debug.dev_id,
 942                                         eeepc->debug.ctrl_param, &retval);
 943         if (ACPI_FAILURE(status))
 944                 return -EIO;
 945
 946         seq_printf(m, "DEVS(%x, %x) = %x\n", eeepc->debug.dev_id,
 947                    eeepc->debug.ctrl_param, retval);
 948
 949         return 0;
 950 }
 951
 952 static struct eeepc_wmi_debugfs_node eeepc_wmi_debug_files[] = {
 953         { NULL, "devs", show_devs },
 954         { NULL, "dsts", show_dsts },
 955 };
 956
 957 static int eeepc_wmi_debugfs_open(struct inode *inode, struct file *file)
 958 {
 959         struct eeepc_wmi_debugfs_node *node = inode->i_private;
 960
 961         return single_open(file, node->show, node->eeepc);
 962 }
 963
 964 static const struct file_operations eeepc_wmi_debugfs_io_ops = {
 965         .owner = THIS_MODULE,
 966         .open  = eeepc_wmi_debugfs_open,
 967         .read = seq_read,
 968         .llseek = seq_lseek,
 969         .release = single_release,
 970 };
 971
 972 static void eeepc_wmi_debugfs_exit(struct eeepc_wmi *eeepc)
 973 {
 974         debugfs_remove_recursive(eeepc->debug.root);
 975 }
 976
 977 static int eeepc_wmi_debugfs_init(struct eeepc_wmi *eeepc)
 978 {
 979         struct dentry *dent;
 980         int i;
 981
 982         eeepc->debug.root = debugfs_create_dir(EEEPC_WMI_FILE, NULL);
 983         if (!eeepc->debug.root) {
 984                 pr_err("failed to create debugfs directory");
 985                 goto error_debugfs;
 986         }
 987
 988         dent = debugfs_create_x32("dev_id", S_IRUGO|S_IWUSR,
 989                                   eeepc->debug.root, &eeepc->debug.dev_id);
 990         if (!dent)
 991                 goto error_debugfs;
 992
 993         dent = debugfs_create_x32("ctrl_param", S_IRUGO|S_IWUSR,
 994                                   eeepc->debug.root, &eeepc->debug.ctrl_param);
 995         if (!dent)
 996                 goto error_debugfs;
 997
 998         for (i = 0; i < ARRAY_SIZE(eeepc_wmi_debug_files); i++) {
 999                 struct eeepc_wmi_debugfs_node *node = &eeepc_wmi_debug_files[i];
1000
1001                 node->eeepc = eeepc;
1002                 dent = debugfs_create_file(node->name, S_IFREG | S_IRUGO,
1003                                            eeepc->debug.root, node,
1004                                            &eeepc_wmi_debugfs_io_ops);
1005                 if (!dent) {
1006                         pr_err("failed to create debug file: %s\n", node->name);
1007                         goto error_debugfs;
1008                 }
1009         }
1010
1011         return 0;
1012
1013 error_debugfs:
1014         eeepc_wmi_debugfs_exit(eeepc);
1015         return -ENOMEM;
1016 }
1017
1018 /*
1019  * WMI Driver
1020  */
1021 static void eeepc_dmi_check(struct eeepc_wmi *eeepc)
1022 {
1023         const char *model;
1024
1025         model = dmi_get_system_info(DMI_PRODUCT_NAME);
1026         if (!model)
1027                 return;
1028
1029         /*
1030          * Whitelist for wlan hotplug
1031          *
1032          * Eeepc 1000H needs the current hotplug code to handle
1033          * Fn+F2 correctly. We may add other Eeepc here later, but
1034          * it seems that most of the laptops supported by eeepc-wmi
1035          * don't need to be on this list
1036          */
1037         if (strcmp(model, "1000H") == 0) {
1038                 eeepc->hotplug_wireless = true;
1039                 pr_info("wlan hotplug enabled\n");
1040         }
1041 }
1042
1043 static struct platform_device * __init eeepc_wmi_add(void)
1044 {
1045         struct eeepc_wmi *eeepc;
1046         acpi_status status;
1047         int err;
1048
1049         eeepc = kzalloc(sizeof(struct eeepc_wmi), GFP_KERNEL);
1050         if (!eeepc)
1051                 return ERR_PTR(-ENOMEM);
1052
1053         eeepc->hotplug_wireless = hotplug_wireless;
1054         eeepc_dmi_check(eeepc);
1055
1056         /*
1057          * Register the platform device first.  It is used as a parent for the
1058          * sub-devices below.
1059          */
1060         err = eeepc_wmi_platform_init(eeepc);
1061         if (err)
1062                 goto fail_platform;
1063
1064         err = eeepc_wmi_input_init(eeepc);
1065         if (err)
1066                 goto fail_input;
1067
1068         err = eeepc_wmi_led_init(eeepc);
1069         if (err)
1070                 goto fail_leds;
1071
1072         err = eeepc_wmi_rfkill_init(eeepc);
1073         if (err)
1074                 goto fail_rfkill;
1075
1076         if (!acpi_video_backlight_support()) {
1077                 err = eeepc_wmi_backlight_init(eeepc);
1078                 if (err)
1079                         goto fail_backlight;
1080         } else
1081                 pr_info("Backlight controlled by ACPI video driver\n");
1082
1083         status = wmi_install_notify_handler(EEEPC_WMI_EVENT_GUID,
1084                                             eeepc_wmi_notify, eeepc);
1085         if (ACPI_FAILURE(status)) {
1086                 pr_err("Unable to register notify handler - %d\n",
1087                         status);
1088                 err = -ENODEV;
1089                 goto fail_wmi_handler;
1090         }
1091
1092         err = eeepc_wmi_debugfs_init(eeepc);
1093         if (err)
1094                 goto fail_debugfs;
1095
1096         return eeepc->platform_device;
1097
1098 fail_debugfs:
1099         wmi_remove_notify_handler(EEEPC_WMI_EVENT_GUID);
1100 fail_wmi_handler:
1101         eeepc_wmi_backlight_exit(eeepc);
1102 fail_backlight:
1103         eeepc_wmi_rfkill_exit(eeepc);
1104 fail_rfkill:
1105         eeepc_wmi_led_exit(eeepc);
1106 fail_leds:
1107         eeepc_wmi_input_exit(eeepc);
1108 fail_input:
1109         eeepc_wmi_platform_exit(eeepc);
1110 fail_platform:
1111         kfree(eeepc);
1112         return ERR_PTR(err);
1113 }
1114
1115 static int eeepc_wmi_remove(struct platform_device *device)
1116 {
1117         struct eeepc_wmi *eeepc;
1118
1119         eeepc = platform_get_drvdata(device);
1120         wmi_remove_notify_handler(EEEPC_WMI_EVENT_GUID);
1121         eeepc_wmi_backlight_exit(eeepc);
1122         eeepc_wmi_input_exit(eeepc);
1123         eeepc_wmi_led_exit(eeepc);
1124         eeepc_wmi_rfkill_exit(eeepc);
1125         eeepc_wmi_debugfs_exit(eeepc);
1126         eeepc_wmi_platform_exit(eeepc);
1127
1128         kfree(eeepc);
1129         return 0;
1130 }
1131
1132 static struct platform_driver platform_driver = {
1133         .driver = {
1134                 .name = EEEPC_WMI_FILE,
1135                 .owner = THIS_MODULE,
1136         },
1137 };
1138
1139 static acpi_status __init eeepc_wmi_parse_device(acpi_handle handle, u32 level,
1140                                                  void *context, void **retval)
1141 {
1142         pr_warning("Found legacy ATKD device (%s)", EEEPC_ACPI_HID);
1143         *(bool *)context = true;
1144         return AE_CTRL_TERMINATE;
1145 }
1146
1147 static int __init eeepc_wmi_check_atkd(void)
1148 {
1149         acpi_status status;
1150         bool found = false;
1151
1152         status = acpi_get_devices(EEEPC_ACPI_HID, eeepc_wmi_parse_device,
1153                                   &found, NULL);
1154
1155         if (ACPI_FAILURE(status) || !found)
1156                 return 0;
1157         return -1;
1158 }
1159
1160 static int __init eeepc_wmi_init(void)
1161 {
1162         int err;
1163
1164         if (!wmi_has_guid(EEEPC_WMI_EVENT_GUID) ||
1165             !wmi_has_guid(EEEPC_WMI_MGMT_GUID)) {
1166                 pr_warning("No known WMI GUID found\n");
1167                 return -ENODEV;
1168         }
1169
1170         if (eeepc_wmi_check_atkd()) {
1171                 pr_warning("WMI device present, but legacy ATKD device is also "
1172                            "present and enabled.");
1173                 pr_warning("You probably booted with acpi_osi=\"Linux\" or "
1174                            "acpi_osi=\"!Windows 2009\"");
1175                 pr_warning("Can't load eeepc-wmi, use default acpi_osi "
1176                            "(preferred) or eeepc-laptop");
1177                 return -ENODEV;
1178         }
1179
1180         platform_device = eeepc_wmi_add();
1181         if (IS_ERR(platform_device)) {
1182                 err = PTR_ERR(platform_device);
1183                 goto fail_eeepc_wmi;
1184         }
1185
1186         err = platform_driver_register(&platform_driver);
1187         if (err) {
1188                 pr_warning("Unable to register platform driver\n");
1189                 goto fail_platform_driver;
1190         }
1191
1192         return 0;
1193
1194 fail_platform_driver:
1195         eeepc_wmi_remove(platform_device);
1196 fail_eeepc_wmi:
1197         return err;
1198 }
1199
1200 static void __exit eeepc_wmi_exit(void)
1201 {
1202         eeepc_wmi_remove(platform_device);
1203         platform_driver_unregister(&platform_driver);
1204 }
1205
1206 module_init(eeepc_wmi_init);
1207 module_exit(eeepc_wmi_exit);