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 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 /* Helper for special devices with magic return codes */
 258 static int eeepc_wmi_get_devstate_simple(u32 dev_id)
 259 {
 260         u32 retval = 0;
 261         acpi_status status;
 262
 263         status = eeepc_wmi_get_devstate(dev_id, &retval);
 264
 265         if (ACPI_FAILURE(status))
 266                 return -EINVAL;
 267
 268         /* If the device is present, DSTS will always set some bits
 269          * 0x00070000 - 1110000000000000000 - device supported
 270          * 0x00060000 - 1100000000000000000 - not supported
 271          * 0x00020000 - 0100000000000000000 - device supported
 272          * 0x00010000 - 0010000000000000000 - not supported / special mode ?
 273          */
 274         if (!retval || retval == 0x00060000)
 275                 return -ENODEV;
 276
 277         return retval & 0x1;
 278 }
 279
 280 /*
 281  * LEDs
 282  */
 283 /*
 284  * These functions actually update the LED's, and are called from a
 285  * workqueue. By doing this as separate work rather than when the LED
 286  * subsystem asks, we avoid messing with the Eeepc ACPI stuff during a
 287  * potentially bad time, such as a timer interrupt.
 288  */
 289 static void tpd_led_update(struct work_struct *work)
 290 {
 291         int ctrl_param;
 292         struct eeepc_wmi *eeepc;
 293
 294         eeepc = container_of(work, struct eeepc_wmi, tpd_led_work);
 295
 296         ctrl_param = eeepc->tpd_led_wk;
 297         eeepc_wmi_set_devstate(EEEPC_WMI_DEVID_TPDLED, ctrl_param, NULL);
 298 }
 299
 300 static void tpd_led_set(struct led_classdev *led_cdev,
 301                         enum led_brightness value)
 302 {
 303         struct eeepc_wmi *eeepc;
 304
 305         eeepc = container_of(led_cdev, struct eeepc_wmi, tpd_led);
 306
 307         eeepc->tpd_led_wk = !!value;
 308         queue_work(eeepc->led_workqueue, &eeepc->tpd_led_work);
 309 }
 310
 311 static int read_tpd_state(struct eeepc_wmi *eeepc)
 312 {
 313         return eeepc_wmi_get_devstate_simple(EEEPC_WMI_DEVID_TPDLED);
 314 }
 315
 316 static enum led_brightness tpd_led_get(struct led_classdev *led_cdev)
 317 {
 318         struct eeepc_wmi *eeepc;
 319
 320         eeepc = container_of(led_cdev, struct eeepc_wmi, tpd_led);
 321
 322         return read_tpd_state(eeepc);
 323 }
 324
 325 static int eeepc_wmi_led_init(struct eeepc_wmi *eeepc)
 326 {
 327         int rv;
 328
 329         if (read_tpd_state(eeepc) < 0)
 330                 return 0;
 331
 332         eeepc->led_workqueue = create_singlethread_workqueue("led_workqueue");
 333         if (!eeepc->led_workqueue)
 334                 return -ENOMEM;
 335         INIT_WORK(&eeepc->tpd_led_work, tpd_led_update);
 336
 337         eeepc->tpd_led.name = "eeepc::touchpad";
 338         eeepc->tpd_led.brightness_set = tpd_led_set;
 339         eeepc->tpd_led.brightness_get = tpd_led_get;
 340         eeepc->tpd_led.max_brightness = 1;
 341
 342         rv = led_classdev_register(&eeepc->platform_device->dev,
 343                                    &eeepc->tpd_led);
 344         if (rv) {
 345                 destroy_workqueue(eeepc->led_workqueue);
 346                 return rv;
 347         }
 348
 349         return 0;
 350 }
 351
 352 static void eeepc_wmi_led_exit(struct eeepc_wmi *eeepc)
 353 {
 354         if (eeepc->tpd_led.dev)
 355                 led_classdev_unregister(&eeepc->tpd_led);
 356         if (eeepc->led_workqueue)
 357                 destroy_workqueue(eeepc->led_workqueue);
 358 }
 359
 360 /*
 361  * PCI hotplug (for wlan rfkill)
 362  */
 363 static bool eeepc_wlan_rfkill_blocked(struct eeepc_wmi *eeepc)
 364 {
 365         int result = eeepc_wmi_get_devstate_simple(EEEPC_WMI_DEVID_WLAN);
 366
 367         if (result < 0)
 368                 return false;
 369         return !result;
 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         int result = eeepc_wmi_get_devstate_simple(EEEPC_WMI_DEVID_WLAN);
 498
 499         if (result < 0)
 500                 return result;
 501
 502         *value = !!result;
 503         return 0;
 504 }
 505
 506 static void eeepc_cleanup_pci_hotplug(struct hotplug_slot *hotplug_slot)
 507 {
 508         kfree(hotplug_slot->info);
 509         kfree(hotplug_slot);
 510 }
 511
 512 static struct hotplug_slot_ops eeepc_hotplug_slot_ops = {
 513         .owner = THIS_MODULE,
 514         .get_adapter_status = eeepc_get_adapter_status,
 515         .get_power_status = eeepc_get_adapter_status,
 516 };
 517
 518 static void eeepc_hotplug_work(struct work_struct *work)
 519 {
 520         struct eeepc_wmi *eeepc;
 521
 522         eeepc = container_of(work, struct eeepc_wmi, hotplug_work);
 523         eeepc_rfkill_hotplug(eeepc);
 524 }
 525
 526 static int eeepc_setup_pci_hotplug(struct eeepc_wmi *eeepc)
 527 {
 528         int ret = -ENOMEM;
 529         struct pci_bus *bus = pci_find_bus(0, 1);
 530
 531         if (!bus) {
 532                 pr_err("Unable to find wifi PCI bus\n");
 533                 return -ENODEV;
 534         }
 535
 536         eeepc->hotplug_workqueue =
 537                 create_singlethread_workqueue("hotplug_workqueue");
 538         if (!eeepc->hotplug_workqueue)
 539                 goto error_workqueue;
 540
 541         INIT_WORK(&eeepc->hotplug_work, eeepc_hotplug_work);
 542
 543         eeepc->hotplug_slot = kzalloc(sizeof(struct hotplug_slot), GFP_KERNEL);
 544         if (!eeepc->hotplug_slot)
 545                 goto error_slot;
 546
 547         eeepc->hotplug_slot->info = kzalloc(sizeof(struct hotplug_slot_info),
 548                                             GFP_KERNEL);
 549         if (!eeepc->hotplug_slot->info)
 550                 goto error_info;
 551
 552         eeepc->hotplug_slot->private = eeepc;
 553         eeepc->hotplug_slot->release = &eeepc_cleanup_pci_hotplug;
 554         eeepc->hotplug_slot->ops = &eeepc_hotplug_slot_ops;
 555         eeepc_get_adapter_status(eeepc->hotplug_slot,
 556                                  &eeepc->hotplug_slot->info->adapter_status);
 557
 558         ret = pci_hp_register(eeepc->hotplug_slot, bus, 0, "eeepc-wifi");
 559         if (ret) {
 560                 pr_err("Unable to register hotplug slot - %d\n", ret);
 561                 goto error_register;
 562         }
 563
 564         return 0;
 565
 566 error_register:
 567         kfree(eeepc->hotplug_slot->info);
 568 error_info:
 569         kfree(eeepc->hotplug_slot);
 570         eeepc->hotplug_slot = NULL;
 571 error_slot:
 572         destroy_workqueue(eeepc->hotplug_workqueue);
 573 error_workqueue:
 574         return ret;
 575 }
 576
 577 /*
 578  * Rfkill devices
 579  */
 580 static int eeepc_rfkill_set(void *data, bool blocked)
 581 {
 582         int dev_id = (unsigned long)data;
 583         u32 ctrl_param = !blocked;
 584         acpi_status status;
 585
 586         status = eeepc_wmi_set_devstate(dev_id, ctrl_param, NULL);
 587
 588         if (ACPI_FAILURE(status))
 589                 return -EIO;
 590
 591         return 0;
 592 }
 593
 594 static void eeepc_rfkill_query(struct rfkill *rfkill, void *data)
 595 {
 596         int dev_id = (unsigned long)data;
 597         int result;
 598
 599         result = eeepc_wmi_get_devstate_simple(dev_id);
 600
 601         if (result < 0)
 602                 return ;
 603
 604         rfkill_set_sw_state(rfkill, !result);
 605 }
 606
 607 static int eeepc_rfkill_wlan_set(void *data, bool blocked)
 608 {
 609         struct eeepc_wmi *eeepc = data;
 610         int ret;
 611
 612         /*
 613          * This handler is enabled only if hotplug is enabled.
 614          * In this case, the eeepc_wmi_set_devstate() will
 615          * trigger a wmi notification and we need to wait
 616          * this call to finish before being able to call
 617          * any wmi method
 618          */
 619         mutex_lock(&eeepc->wmi_lock);
 620         ret = eeepc_rfkill_set((void *)(long)EEEPC_WMI_DEVID_WLAN, blocked);
 621         mutex_unlock(&eeepc->wmi_lock);
 622         return ret;
 623 }
 624
 625 static void eeepc_rfkill_wlan_query(struct rfkill *rfkill, void *data)
 626 {
 627         eeepc_rfkill_query(rfkill, (void *)(long)EEEPC_WMI_DEVID_WLAN);
 628 }
 629
 630 static const struct rfkill_ops eeepc_rfkill_wlan_ops = {
 631         .set_block = eeepc_rfkill_wlan_set,
 632         .query = eeepc_rfkill_wlan_query,
 633 };
 634
 635 static const struct rfkill_ops eeepc_rfkill_ops = {
 636         .set_block = eeepc_rfkill_set,
 637         .query = eeepc_rfkill_query,
 638 };
 639
 640 static int eeepc_new_rfkill(struct eeepc_wmi *eeepc,
 641                             struct rfkill **rfkill,
 642                             const char *name,
 643                             enum rfkill_type type, int dev_id)
 644 {
 645         int result = eeepc_wmi_get_devstate_simple(dev_id);
 646
 647         if (result < 0)
 648                 return result;
 649
 650         if (dev_id == EEEPC_WMI_DEVID_WLAN && eeepc->hotplug_wireless)
 651                 *rfkill = rfkill_alloc(name, &eeepc->platform_device->dev, type,
 652                                        &eeepc_rfkill_wlan_ops, eeepc);
 653         else
 654                 *rfkill = rfkill_alloc(name, &eeepc->platform_device->dev, type,
 655                                        &eeepc_rfkill_ops, (void *)(long)dev_id);
 656
 657         if (!*rfkill)
 658                 return -EINVAL;
 659
 660         rfkill_init_sw_state(*rfkill, !result);
 661         result = rfkill_register(*rfkill);
 662         if (result) {
 663                 rfkill_destroy(*rfkill);
 664                 *rfkill = NULL;
 665                 return result;
 666         }
 667         return 0;
 668 }
 669
 670 static void eeepc_wmi_rfkill_exit(struct eeepc_wmi *eeepc)
 671 {
 672         eeepc_unregister_rfkill_notifier(eeepc, "\\_SB.PCI0.P0P5");
 673         eeepc_unregister_rfkill_notifier(eeepc, "\\_SB.PCI0.P0P6");
 674         eeepc_unregister_rfkill_notifier(eeepc, "\\_SB.PCI0.P0P7");
 675         if (eeepc->wlan_rfkill) {
 676                 rfkill_unregister(eeepc->wlan_rfkill);
 677                 rfkill_destroy(eeepc->wlan_rfkill);
 678                 eeepc->wlan_rfkill = NULL;
 679         }
 680         /*
 681          * Refresh pci hotplug in case the rfkill state was changed after
 682          * eeepc_unregister_rfkill_notifier()
 683          */
 684         eeepc_rfkill_hotplug(eeepc);
 685         if (eeepc->hotplug_slot)
 686                 pci_hp_deregister(eeepc->hotplug_slot);
 687         if (eeepc->hotplug_workqueue)
 688                 destroy_workqueue(eeepc->hotplug_workqueue);
 689
 690         if (eeepc->bluetooth_rfkill) {
 691                 rfkill_unregister(eeepc->bluetooth_rfkill);
 692                 rfkill_destroy(eeepc->bluetooth_rfkill);
 693                 eeepc->bluetooth_rfkill = NULL;
 694         }
 695         if (eeepc->wwan3g_rfkill) {
 696                 rfkill_unregister(eeepc->wwan3g_rfkill);
 697                 rfkill_destroy(eeepc->wwan3g_rfkill);
 698                 eeepc->wwan3g_rfkill = NULL;
 699         }
 700 }
 701
 702 static int eeepc_wmi_rfkill_init(struct eeepc_wmi *eeepc)
 703 {
 704         int result = 0;
 705
 706         mutex_init(&eeepc->hotplug_lock);
 707         mutex_init(&eeepc->wmi_lock);
 708
 709         result = eeepc_new_rfkill(eeepc, &eeepc->wlan_rfkill,
 710                                   "eeepc-wlan", RFKILL_TYPE_WLAN,
 711                                   EEEPC_WMI_DEVID_WLAN);
 712
 713         if (result && result != -ENODEV)
 714                 goto exit;
 715
 716         result = eeepc_new_rfkill(eeepc, &eeepc->bluetooth_rfkill,
 717                                   "eeepc-bluetooth", RFKILL_TYPE_BLUETOOTH,
 718                                   EEEPC_WMI_DEVID_BLUETOOTH);
 719
 720         if (result && result != -ENODEV)
 721                 goto exit;
 722
 723         result = eeepc_new_rfkill(eeepc, &eeepc->wwan3g_rfkill,
 724                                   "eeepc-wwan3g", RFKILL_TYPE_WWAN,
 725                                   EEEPC_WMI_DEVID_WWAN3G);
 726
 727         if (result && result != -ENODEV)
 728                 goto exit;
 729
 730         result = eeepc_setup_pci_hotplug(eeepc);
 731         /*
 732          * If we get -EBUSY then something else is handling the PCI hotplug -
 733          * don't fail in this case
 734          */
 735         if (result == -EBUSY)
 736                 result = 0;
 737
 738         eeepc_register_rfkill_notifier(eeepc, "\\_SB.PCI0.P0P5");
 739         eeepc_register_rfkill_notifier(eeepc, "\\_SB.PCI0.P0P6");
 740         eeepc_register_rfkill_notifier(eeepc, "\\_SB.PCI0.P0P7");
 741         /*
 742          * Refresh pci hotplug in case the rfkill state was changed during
 743          * setup.
 744          */
 745         eeepc_rfkill_hotplug(eeepc);
 746
 747 exit:
 748         if (result && result != -ENODEV)
 749                 eeepc_wmi_rfkill_exit(eeepc);
 750
 751         if (result == -ENODEV)
 752                 result = 0;
 753
 754         return result;
 755 }
 756
 757 /*
 758  * Backlight
 759  */
 760 static int read_brightness(struct backlight_device *bd)
 761 {
 762         u32 retval;
 763         acpi_status status;
 764
 765         status = eeepc_wmi_get_devstate(EEEPC_WMI_DEVID_BACKLIGHT, &retval);
 766
 767         if (ACPI_FAILURE(status))
 768                 return -1;
 769         else
 770                 return retval & 0xFF;
 771 }
 772
 773 static int update_bl_status(struct backlight_device *bd)
 774 {
 775
 776         u32 ctrl_param;
 777         acpi_status status;
 778
 779         ctrl_param = bd->props.brightness;
 780
 781         status = eeepc_wmi_set_devstate(EEEPC_WMI_DEVID_BACKLIGHT,
 782                                         ctrl_param, NULL);
 783
 784         if (ACPI_FAILURE(status))
 785                 return -1;
 786         else
 787                 return 0;
 788 }
 789
 790 static const struct backlight_ops eeepc_wmi_bl_ops = {
 791         .get_brightness = read_brightness,
 792         .update_status = update_bl_status,
 793 };
 794
 795 static int eeepc_wmi_backlight_notify(struct eeepc_wmi *eeepc, int code)
 796 {
 797         struct backlight_device *bd = eeepc->backlight_device;
 798         int old = bd->props.brightness;
 799         int new = old;
 800
 801         if (code >= NOTIFY_BRNUP_MIN && code <= NOTIFY_BRNUP_MAX)
 802                 new = code - NOTIFY_BRNUP_MIN + 1;
 803         else if (code >= NOTIFY_BRNDOWN_MIN && code <= NOTIFY_BRNDOWN_MAX)
 804                 new = code - NOTIFY_BRNDOWN_MIN;
 805
 806         bd->props.brightness = new;
 807         backlight_update_status(bd);
 808         backlight_force_update(bd, BACKLIGHT_UPDATE_HOTKEY);
 809
 810         return old;
 811 }
 812
 813 static int eeepc_wmi_backlight_init(struct eeepc_wmi *eeepc)
 814 {
 815         struct backlight_device *bd;
 816         struct backlight_properties props;
 817
 818         memset(&props, 0, sizeof(struct backlight_properties));
 819         props.max_brightness = 15;
 820         bd = backlight_device_register(EEEPC_WMI_FILE,
 821                                        &eeepc->platform_device->dev, eeepc,
 822                                        &eeepc_wmi_bl_ops, &props);
 823         if (IS_ERR(bd)) {
 824                 pr_err("Could not register backlight device\n");
 825                 return PTR_ERR(bd);
 826         }
 827
 828         eeepc->backlight_device = bd;
 829
 830         bd->props.brightness = read_brightness(bd);
 831         bd->props.power = FB_BLANK_UNBLANK;
 832         backlight_update_status(bd);
 833
 834         return 0;
 835 }
 836
 837 static void eeepc_wmi_backlight_exit(struct eeepc_wmi *eeepc)
 838 {
 839         if (eeepc->backlight_device)
 840                 backlight_device_unregister(eeepc->backlight_device);
 841
 842         eeepc->backlight_device = NULL;
 843 }
 844
 845 static void eeepc_wmi_notify(u32 value, void *context)
 846 {
 847         struct eeepc_wmi *eeepc = context;
 848         struct acpi_buffer response = { ACPI_ALLOCATE_BUFFER, NULL };
 849         union acpi_object *obj;
 850         acpi_status status;
 851         int code;
 852         int orig_code;
 853
 854         status = wmi_get_event_data(value, &response);
 855         if (status != AE_OK) {
 856                 pr_err("bad event status 0x%x\n", status);
 857                 return;
 858         }
 859
 860         obj = (union acpi_object *)response.pointer;
 861
 862         if (obj && obj->type == ACPI_TYPE_INTEGER) {
 863                 code = obj->integer.value;
 864                 orig_code = code;
 865
 866                 if (code >= NOTIFY_BRNUP_MIN && code <= NOTIFY_BRNUP_MAX)
 867                         code = NOTIFY_BRNUP_MIN;
 868                 else if (code >= NOTIFY_BRNDOWN_MIN &&
 869                          code <= NOTIFY_BRNDOWN_MAX)
 870                         code = NOTIFY_BRNDOWN_MIN;
 871
 872                 if (code == NOTIFY_BRNUP_MIN || code == NOTIFY_BRNDOWN_MIN) {
 873                         if (!acpi_video_backlight_support())
 874                                 eeepc_wmi_backlight_notify(eeepc, orig_code);
 875                 }
 876
 877                 if (!sparse_keymap_report_event(eeepc->inputdev,
 878                                                 code, 1, true))
 879                         pr_info("Unknown key %x pressed\n", code);
 880         }
 881
 882         kfree(obj);
 883 }
 884
 885 static ssize_t store_cpufv(struct device *dev, struct device_attribute *attr,
 886                            const char *buf, size_t count)
 887 {
 888         int value;
 889         struct acpi_buffer input = { (acpi_size)sizeof(value), &value };
 890         acpi_status status;
 891
 892         if (!count || sscanf(buf, "%i", &value) != 1)
 893                 return -EINVAL;
 894         if (value < 0 || value > 2)
 895                 return -EINVAL;
 896
 897         status = wmi_evaluate_method(EEEPC_WMI_MGMT_GUID,
 898                                      1, EEEPC_WMI_METHODID_CFVS, &input, NULL);
 899
 900         if (ACPI_FAILURE(status))
 901                 return -EIO;
 902         else
 903                 return count;
 904 }
 905
 906 static DEVICE_ATTR(cpufv, S_IRUGO | S_IWUSR, NULL, store_cpufv);
 907
 908 static struct attribute *platform_attributes[] = {
 909         &dev_attr_cpufv.attr,
 910         NULL
 911 };
 912
 913 static struct attribute_group platform_attribute_group = {
 914         .attrs = platform_attributes
 915 };
 916
 917 static void eeepc_wmi_sysfs_exit(struct platform_device *device)
 918 {
 919         sysfs_remove_group(&device->dev.kobj, &platform_attribute_group);
 920 }
 921
 922 static int eeepc_wmi_sysfs_init(struct platform_device *device)
 923 {
 924         return sysfs_create_group(&device->dev.kobj, &platform_attribute_group);
 925 }
 926
 927 /*
 928  * Platform device
 929  */
 930 static int __init eeepc_wmi_platform_init(struct eeepc_wmi *eeepc)
 931 {
 932         return eeepc_wmi_sysfs_init(eeepc->platform_device);
 933 }
 934
 935 static void eeepc_wmi_platform_exit(struct eeepc_wmi *eeepc)
 936 {
 937         eeepc_wmi_sysfs_exit(eeepc->platform_device);
 938 }
 939
 940 /*
 941  * debugfs
 942  */
 943 struct eeepc_wmi_debugfs_node {
 944         struct eeepc_wmi *eeepc;
 945         char *name;
 946         int (*show)(struct seq_file *m, void *data);
 947 };
 948
 949 static int show_dsts(struct seq_file *m, void *data)
 950 {
 951         struct eeepc_wmi *eeepc = m->private;
 952         acpi_status status;
 953         u32 retval = -1;
 954
 955         status = eeepc_wmi_get_devstate(eeepc->debug.dev_id, &retval);
 956
 957         if (ACPI_FAILURE(status))
 958                 return -EIO;
 959
 960         seq_printf(m, "DSTS(%x) = %x\n", eeepc->debug.dev_id, retval);
 961
 962         return 0;
 963 }
 964
 965 static int show_devs(struct seq_file *m, void *data)
 966 {
 967         struct eeepc_wmi *eeepc = m->private;
 968         acpi_status status;
 969         u32 retval = -1;
 970
 971         status = eeepc_wmi_set_devstate(eeepc->debug.dev_id,
 972                                         eeepc->debug.ctrl_param, &retval);
 973         if (ACPI_FAILURE(status))
 974                 return -EIO;
 975
 976         seq_printf(m, "DEVS(%x, %x) = %x\n", eeepc->debug.dev_id,
 977                    eeepc->debug.ctrl_param, retval);
 978
 979         return 0;
 980 }
 981
 982 static struct eeepc_wmi_debugfs_node eeepc_wmi_debug_files[] = {
 983         { NULL, "devs", show_devs },
 984         { NULL, "dsts", show_dsts },
 985 };
 986
 987 static int eeepc_wmi_debugfs_open(struct inode *inode, struct file *file)
 988 {
 989         struct eeepc_wmi_debugfs_node *node = inode->i_private;
 990
 991         return single_open(file, node->show, node->eeepc);
 992 }
 993
 994 static const struct file_operations eeepc_wmi_debugfs_io_ops = {
 995         .owner = THIS_MODULE,
 996         .open  = eeepc_wmi_debugfs_open,
 997         .read = seq_read,
 998         .llseek = seq_lseek,
 999         .release = single_release,
1000 };
1001
1002 static void eeepc_wmi_debugfs_exit(struct eeepc_wmi *eeepc)
1003 {
1004         debugfs_remove_recursive(eeepc->debug.root);
1005 }
1006
1007 static int eeepc_wmi_debugfs_init(struct eeepc_wmi *eeepc)
1008 {
1009         struct dentry *dent;
1010         int i;
1011
1012         eeepc->debug.root = debugfs_create_dir(EEEPC_WMI_FILE, NULL);
1013         if (!eeepc->debug.root) {
1014                 pr_err("failed to create debugfs directory");
1015                 goto error_debugfs;
1016         }
1017
1018         dent = debugfs_create_x32("dev_id", S_IRUGO|S_IWUSR,
1019                                   eeepc->debug.root, &eeepc->debug.dev_id);
1020         if (!dent)
1021                 goto error_debugfs;
1022
1023         dent = debugfs_create_x32("ctrl_param", S_IRUGO|S_IWUSR,
1024                                   eeepc->debug.root, &eeepc->debug.ctrl_param);
1025         if (!dent)
1026                 goto error_debugfs;
1027
1028         for (i = 0; i < ARRAY_SIZE(eeepc_wmi_debug_files); i++) {
1029                 struct eeepc_wmi_debugfs_node *node = &eeepc_wmi_debug_files[i];
1030
1031                 node->eeepc = eeepc;
1032                 dent = debugfs_create_file(node->name, S_IFREG | S_IRUGO,
1033                                            eeepc->debug.root, node,
1034                                            &eeepc_wmi_debugfs_io_ops);
1035                 if (!dent) {
1036                         pr_err("failed to create debug file: %s\n", node->name);
1037                         goto error_debugfs;
1038                 }
1039         }
1040
1041         return 0;
1042
1043 error_debugfs:
1044         eeepc_wmi_debugfs_exit(eeepc);
1045         return -ENOMEM;
1046 }
1047
1048 /*
1049  * WMI Driver
1050  */
1051 static void eeepc_dmi_check(struct eeepc_wmi *eeepc)
1052 {
1053         const char *model;
1054
1055         model = dmi_get_system_info(DMI_PRODUCT_NAME);
1056         if (!model)
1057                 return;
1058
1059         /*
1060          * Whitelist for wlan hotplug
1061          *
1062          * Eeepc 1000H needs the current hotplug code to handle
1063          * Fn+F2 correctly. We may add other Eeepc here later, but
1064          * it seems that most of the laptops supported by eeepc-wmi
1065          * don't need to be on this list
1066          */
1067         if (strcmp(model, "1000H") == 0) {
1068                 eeepc->hotplug_wireless = true;
1069                 pr_info("wlan hotplug enabled\n");
1070         }
1071 }
1072
1073 static int __init eeepc_wmi_add(struct platform_device *pdev)
1074 {
1075         struct eeepc_wmi *eeepc;
1076         acpi_status status;
1077         int err;
1078
1079         eeepc = kzalloc(sizeof(struct eeepc_wmi), GFP_KERNEL);
1080         if (!eeepc)
1081                 return -ENOMEM;
1082
1083         eeepc->platform_device = pdev;
1084         platform_set_drvdata(eeepc->platform_device, eeepc);
1085
1086         eeepc->hotplug_wireless = hotplug_wireless;
1087         eeepc_dmi_check(eeepc);
1088
1089         err = eeepc_wmi_platform_init(eeepc);
1090         if (err)
1091                 goto fail_platform;
1092
1093         err = eeepc_wmi_input_init(eeepc);
1094         if (err)
1095                 goto fail_input;
1096
1097         err = eeepc_wmi_led_init(eeepc);
1098         if (err)
1099                 goto fail_leds;
1100
1101         err = eeepc_wmi_rfkill_init(eeepc);
1102         if (err)
1103                 goto fail_rfkill;
1104
1105         if (!acpi_video_backlight_support()) {
1106                 err = eeepc_wmi_backlight_init(eeepc);
1107                 if (err)
1108                         goto fail_backlight;
1109         } else
1110                 pr_info("Backlight controlled by ACPI video driver\n");
1111
1112         status = wmi_install_notify_handler(EEEPC_WMI_EVENT_GUID,
1113                                             eeepc_wmi_notify, eeepc);
1114         if (ACPI_FAILURE(status)) {
1115                 pr_err("Unable to register notify handler - %d\n",
1116                         status);
1117                 err = -ENODEV;
1118                 goto fail_wmi_handler;
1119         }
1120
1121         err = eeepc_wmi_debugfs_init(eeepc);
1122         if (err)
1123                 goto fail_debugfs;
1124
1125         return 0;
1126
1127 fail_debugfs:
1128         wmi_remove_notify_handler(EEEPC_WMI_EVENT_GUID);
1129 fail_wmi_handler:
1130         eeepc_wmi_backlight_exit(eeepc);
1131 fail_backlight:
1132         eeepc_wmi_rfkill_exit(eeepc);
1133 fail_rfkill:
1134         eeepc_wmi_led_exit(eeepc);
1135 fail_leds:
1136         eeepc_wmi_input_exit(eeepc);
1137 fail_input:
1138         eeepc_wmi_platform_exit(eeepc);
1139 fail_platform:
1140         kfree(eeepc);
1141         return err;
1142 }
1143
1144 static int __exit eeepc_wmi_remove(struct platform_device *device)
1145 {
1146         struct eeepc_wmi *eeepc;
1147
1148         eeepc = platform_get_drvdata(device);
1149         wmi_remove_notify_handler(EEEPC_WMI_EVENT_GUID);
1150         eeepc_wmi_backlight_exit(eeepc);
1151         eeepc_wmi_input_exit(eeepc);
1152         eeepc_wmi_led_exit(eeepc);
1153         eeepc_wmi_rfkill_exit(eeepc);
1154         eeepc_wmi_debugfs_exit(eeepc);
1155         eeepc_wmi_platform_exit(eeepc);
1156
1157         kfree(eeepc);
1158         return 0;
1159 }
1160
1161 /*
1162  * Platform driver - hibernate/resume callbacks
1163  */
1164 static int eeepc_hotk_thaw(struct device *device)
1165 {
1166         struct eeepc_wmi *eeepc = dev_get_drvdata(device);
1167
1168         if (eeepc->wlan_rfkill) {
1169                 bool wlan;
1170
1171                 /*
1172                  * Work around bios bug - acpi _PTS turns off the wireless led
1173                  * during suspend.  Normally it restores it on resume, but
1174                  * we should kick it ourselves in case hibernation is aborted.
1175                  */
1176                 wlan = eeepc_wmi_get_devstate_simple(EEEPC_WMI_DEVID_WLAN);
1177                 eeepc_wmi_set_devstate(EEEPC_WMI_DEVID_WLAN, wlan, NULL);
1178         }
1179
1180         return 0;
1181 }
1182
1183 static int eeepc_hotk_restore(struct device *device)
1184 {
1185         struct eeepc_wmi *eeepc = dev_get_drvdata(device);
1186         int bl;
1187
1188         /* Refresh both wlan rfkill state and pci hotplug */
1189         if (eeepc->wlan_rfkill)
1190                 eeepc_rfkill_hotplug(eeepc);
1191
1192         if (eeepc->bluetooth_rfkill) {
1193                 bl = !eeepc_wmi_get_devstate_simple(EEEPC_WMI_DEVID_BLUETOOTH);
1194                 rfkill_set_sw_state(eeepc->bluetooth_rfkill, bl);
1195 }
1196         if (eeepc->wwan3g_rfkill) {
1197                 bl = !eeepc_wmi_get_devstate_simple(EEEPC_WMI_DEVID_WWAN3G);
1198                 rfkill_set_sw_state(eeepc->wwan3g_rfkill, bl);
1199         }
1200
1201         return 0;
1202 }
1203
1204 static const struct dev_pm_ops eeepc_pm_ops = {
1205         .thaw = eeepc_hotk_thaw,
1206         .restore = eeepc_hotk_restore,
1207 };
1208
1209 static struct platform_driver platform_driver = {
1210         .remove = __exit_p(eeepc_wmi_remove),
1211         .driver = {
1212                 .name = EEEPC_WMI_FILE,
1213                 .owner = THIS_MODULE,
1214                 .pm = &eeepc_pm_ops,
1215         },
1216 };
1217
1218 static acpi_status __init eeepc_wmi_parse_device(acpi_handle handle, u32 level,
1219                                                  void *context, void **retval)
1220 {
1221         pr_warning("Found legacy ATKD device (%s)", EEEPC_ACPI_HID);
1222         *(bool *)context = true;
1223         return AE_CTRL_TERMINATE;
1224 }
1225
1226 static int __init eeepc_wmi_check_atkd(void)
1227 {
1228         acpi_status status;
1229         bool found = false;
1230
1231         status = acpi_get_devices(EEEPC_ACPI_HID, eeepc_wmi_parse_device,
1232                                   &found, NULL);
1233
1234         if (ACPI_FAILURE(status) || !found)
1235                 return 0;
1236         return -1;
1237 }
1238
1239 static int __init eeepc_wmi_probe(struct platform_device *pdev)
1240 {
1241         if (!wmi_has_guid(EEEPC_WMI_EVENT_GUID) ||
1242             !wmi_has_guid(EEEPC_WMI_MGMT_GUID)) {
1243                 pr_warning("No known WMI GUID found\n");
1244                 return -ENODEV;
1245         }
1246
1247         if (eeepc_wmi_check_atkd()) {
1248                 pr_warning("WMI device present, but legacy ATKD device is also "
1249                            "present and enabled.");
1250                 pr_warning("You probably booted with acpi_osi=\"Linux\" or "
1251                            "acpi_osi=\"!Windows 2009\"");
1252                 pr_warning("Can't load eeepc-wmi, use default acpi_osi "
1253                            "(preferred) or eeepc-laptop");
1254                 return -ENODEV;
1255         }
1256
1257         return eeepc_wmi_add(pdev);
1258 }
1259
1260 static struct platform_device *platform_device;
1261
1262 static int __init eeepc_wmi_init(void)
1263 {
1264         platform_device = platform_create_bundle(&platform_driver,
1265                                                  eeepc_wmi_probe,
1266                                                  NULL, 0, NULL, 0);
1267         if (IS_ERR(platform_device))
1268                 return PTR_ERR(platform_device);
1269         return 0;
1270 }
1271
1272 static void __exit eeepc_wmi_exit(void)
1273 {
1274         platform_device_unregister(platform_device);
1275         platform_driver_unregister(&platform_driver);
1276 }
1277
1278 module_init(eeepc_wmi_init);
1279 module_exit(eeepc_wmi_exit);