drivers/platform/x86/eeepc-wmi.c

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