LXR linux/drivers/platform/x86/eeepc-wmi.c

   1/*
   2 * Eee PC WMI hotkey driver
   3 *
   4 * Copyright(C) 2010 Intel Corporation.
   5 * Copyright(C) 2010-2011 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/input.h>
  33#include <linux/input/sparse-keymap.h>
  34#include <linux/dmi.h>
  35#include <acpi/acpi_bus.h>
  36
  37#include "asus-wmi.h"
  38
  39#define EEEPC_WMI_FILE  "eeepc-wmi"
  40
  41MODULE_AUTHOR("Corentin Chary <corentincj@iksaif.net>");
  42MODULE_DESCRIPTION("Eee PC WMI Hotkey Driver");
  43MODULE_LICENSE("GPL");
  44
  45#define EEEPC_ACPI_HID          "ASUS010" /* old _HID used in eeepc-laptop */
  46
  47#define EEEPC_WMI_EVENT_GUID    "ABBC0F72-8EA1-11D1-00A0-C90629100000"
  48
  49MODULE_ALIAS("wmi:"EEEPC_WMI_EVENT_GUID);
  50
  51static bool hotplug_wireless;
  52
  53module_param(hotplug_wireless, bool, 0444);
  54MODULE_PARM_DESC(hotplug_wireless,
  55                 "Enable hotplug for wireless device. "
  56                 "If your laptop needs that, please report to "
  57                 "acpi4asus-user@lists.sourceforge.net.");
  58
  59/* Values for T101MT "Home" key */
  60#define HOME_PRESS      0xe4
  61#define HOME_HOLD       0xea
  62#define HOME_RELEASE    0xe5
  63
  64static const struct key_entry eeepc_wmi_keymap[] = {
  65        /* Sleep already handled via generic ACPI code */
  66        { KE_KEY, 0x30, { KEY_VOLUMEUP } },
  67        { KE_KEY, 0x31, { KEY_VOLUMEDOWN } },
  68        { KE_KEY, 0x32, { KEY_MUTE } },
  69        { KE_KEY, 0x5c, { KEY_F15 } }, /* Power Gear key */
  70        { KE_KEY, 0x5d, { KEY_WLAN } },
  71        { KE_KEY, 0x6b, { KEY_TOUCHPAD_TOGGLE } }, /* Toggle Touchpad */
  72        { KE_KEY, 0x82, { KEY_CAMERA } },
  73        { KE_KEY, 0x83, { KEY_CAMERA_ZOOMIN } },
  74        { KE_KEY, 0x88, { KEY_WLAN } },
  75        { KE_KEY, 0xbd, { KEY_CAMERA } },
  76        { KE_KEY, 0xcc, { KEY_SWITCHVIDEOMODE } },
  77        { KE_KEY, 0xe0, { KEY_PROG1 } }, /* Task Manager */
  78        { KE_KEY, 0xe1, { KEY_F14 } }, /* Change Resolution */
  79        { KE_KEY, HOME_PRESS, { KEY_CONFIG } }, /* Home/Express gate key */
  80        { KE_KEY, 0xe8, { KEY_SCREENLOCK } },
  81        { KE_KEY, 0xe9, { KEY_BRIGHTNESS_ZERO } },
  82        { KE_KEY, 0xeb, { KEY_CAMERA_ZOOMOUT } },
  83        { KE_KEY, 0xec, { KEY_CAMERA_UP } },
  84        { KE_KEY, 0xed, { KEY_CAMERA_DOWN } },
  85        { KE_KEY, 0xee, { KEY_CAMERA_LEFT } },
  86        { KE_KEY, 0xef, { KEY_CAMERA_RIGHT } },
  87        { KE_END, 0},
  88};
  89
  90static void eeepc_wmi_key_filter(struct asus_wmi_driver *asus_wmi, int *code,
  91                                 unsigned int *value, bool *autorelease)
  92{
  93        switch (*code) {
  94        case HOME_PRESS:
  95                *value = 1;
  96                *autorelease = 0;
  97                break;
  98        case HOME_HOLD:
  99                *code = ASUS_WMI_KEY_IGNORE;
 100                break;
 101        case HOME_RELEASE:
 102                *code = HOME_PRESS;
 103                *value = 0;
 104                *autorelease = 0;
 105                break;
 106        }
 107}
 108
 109static acpi_status eeepc_wmi_parse_device(acpi_handle handle, u32 level,
 110                                                 void *context, void **retval)
 111{
 112        pr_warn("Found legacy ATKD device (%s)\n", EEEPC_ACPI_HID);
 113        *(bool *)context = true;
 114        return AE_CTRL_TERMINATE;
 115}
 116
 117static int eeepc_wmi_check_atkd(void)
 118{
 119        acpi_status status;
 120        bool found = false;
 121
 122        status = acpi_get_devices(EEEPC_ACPI_HID, eeepc_wmi_parse_device,
 123                                  &found, NULL);
 124
 125        if (ACPI_FAILURE(status) || !found)
 126                return 0;
 127        return -1;
 128}
 129
 130static int eeepc_wmi_probe(struct platform_device *pdev)
 131{
 132        if (eeepc_wmi_check_atkd()) {
 133                pr_warn("WMI device present, but legacy ATKD device is also "
 134                        "present and enabled\n");
 135                pr_warn("You probably booted with acpi_osi=\"Linux\" or "
 136                        "acpi_osi=\"!Windows 2009\"\n");
 137                pr_warn("Can't load eeepc-wmi, use default acpi_osi "
 138                        "(preferred) or eeepc-laptop\n");
 139                return -EBUSY;
 140        }
 141        return 0;
 142}
 143
 144static void eeepc_dmi_check(struct asus_wmi_driver *driver)
 145{
 146        const char *model;
 147
 148        model = dmi_get_system_info(DMI_PRODUCT_NAME);
 149        if (!model)
 150                return;
 151
 152        /*
 153         * Whitelist for wlan hotplug
 154         *
 155         * Asus 1000H needs the current hotplug code to handle
 156         * Fn+F2 correctly. We may add other Asus here later, but
 157         * it seems that most of the laptops supported by asus-wmi
 158         * don't need to be on this list
 159         */
 160        if (strcmp(model, "1000H") == 0) {
 161                driver->hotplug_wireless = true;
 162                pr_info("wlan hotplug enabled\n");
 163        }
 164}
 165
 166static void eeepc_wmi_quirks(struct asus_wmi_driver *driver)
 167{
 168        driver->hotplug_wireless = hotplug_wireless;
 169        driver->wapf = -1;
 170        eeepc_dmi_check(driver);
 171}
 172
 173static struct asus_wmi_driver asus_wmi_driver = {
 174        .name = EEEPC_WMI_FILE,
 175        .owner = THIS_MODULE,
 176        .event_guid = EEEPC_WMI_EVENT_GUID,
 177        .keymap = eeepc_wmi_keymap,
 178        .input_name = "Eee PC WMI hotkeys",
 179        .input_phys = EEEPC_WMI_FILE "/input0",
 180        .key_filter = eeepc_wmi_key_filter,
 181        .probe = eeepc_wmi_probe,
 182        .quirks = eeepc_wmi_quirks,
 183};
 184
 185
 186static int __init eeepc_wmi_init(void)
 187{
 188        return asus_wmi_register_driver(&asus_wmi_driver);
 189}
 190
 191static void __exit eeepc_wmi_exit(void)
 192{
 193        asus_wmi_unregister_driver(&asus_wmi_driver);
 194}
 195
 196module_init(eeepc_wmi_init);
 197module_exit(eeepc_wmi_exit);
 198