linux/drivers/platform/x86/eeepc-wmi.c
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   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 <linux/fb.h>
  36#include <linux/acpi.h>
  37
  38#include "asus-wmi.h"
  39
  40#define EEEPC_WMI_FILE  "eeepc-wmi"
  41
  42MODULE_AUTHOR("Corentin Chary <corentin.chary@gmail.com>");
  43MODULE_DESCRIPTION("Eee PC WMI Hotkey Driver");
  44MODULE_LICENSE("GPL");
  45
  46#define EEEPC_ACPI_HID          "ASUS010" /* old _HID used in eeepc-laptop */
  47
  48#define EEEPC_WMI_EVENT_GUID    "ABBC0F72-8EA1-11D1-00A0-C90629100000"
  49
  50MODULE_ALIAS("wmi:"EEEPC_WMI_EVENT_GUID);
  51
  52static bool hotplug_wireless;
  53
  54module_param(hotplug_wireless, bool, 0444);
  55MODULE_PARM_DESC(hotplug_wireless,
  56                 "Enable hotplug for wireless device. "
  57                 "If your laptop needs that, please report to "
  58                 "acpi4asus-user@lists.sourceforge.net.");
  59
  60/* Values for T101MT "Home" key */
  61#define HOME_PRESS      0xe4
  62#define HOME_HOLD       0xea
  63#define HOME_RELEASE    0xe5
  64
  65static const struct key_entry eeepc_wmi_keymap[] = {
  66        { KE_KEY, ASUS_WMI_BRN_DOWN, { KEY_BRIGHTNESSDOWN } },
  67        { KE_KEY, ASUS_WMI_BRN_UP, { KEY_BRIGHTNESSUP } },
  68        /* Sleep already handled via generic ACPI code */
  69        { KE_KEY, 0x30, { KEY_VOLUMEUP } },
  70        { KE_KEY, 0x31, { KEY_VOLUMEDOWN } },
  71        { KE_KEY, 0x32, { KEY_MUTE } },
  72        { KE_KEY, 0x5c, { KEY_F15 } }, /* Power Gear key */
  73        { KE_KEY, 0x5d, { KEY_WLAN } },
  74        { KE_KEY, 0x6b, { KEY_TOUCHPAD_TOGGLE } }, /* Toggle Touchpad */
  75        { KE_KEY, 0x82, { KEY_CAMERA } },
  76        { KE_KEY, 0x83, { KEY_CAMERA_ZOOMIN } },
  77        { KE_KEY, 0x88, { KEY_WLAN } },
  78        { KE_KEY, 0xbd, { KEY_CAMERA } },
  79        { KE_KEY, 0xcc, { KEY_SWITCHVIDEOMODE } },
  80        { KE_KEY, 0xe0, { KEY_PROG1 } }, /* Task Manager */
  81        { KE_KEY, 0xe1, { KEY_F14 } }, /* Change Resolution */
  82        { KE_KEY, HOME_PRESS, { KEY_CONFIG } }, /* Home/Express gate key */
  83        { KE_KEY, 0xe8, { KEY_SCREENLOCK } },
  84        { KE_KEY, 0xe9, { KEY_DISPLAYTOGGLE } },
  85        { KE_KEY, 0xeb, { KEY_CAMERA_ZOOMOUT } },
  86        { KE_KEY, 0xec, { KEY_CAMERA_UP } },
  87        { KE_KEY, 0xed, { KEY_CAMERA_DOWN } },
  88        { KE_KEY, 0xee, { KEY_CAMERA_LEFT } },
  89        { KE_KEY, 0xef, { KEY_CAMERA_RIGHT } },
  90        { KE_KEY, 0xf3, { KEY_MENU } },
  91        { KE_KEY, 0xf5, { KEY_HOMEPAGE } },
  92        { KE_KEY, 0xf6, { KEY_ESC } },
  93        { KE_END, 0},
  94};
  95
  96static struct quirk_entry quirk_asus_unknown = {
  97};
  98
  99static struct quirk_entry quirk_asus_1000h = {
 100        .hotplug_wireless = true,
 101};
 102
 103static struct quirk_entry quirk_asus_et2012_type1 = {
 104        .store_backlight_power = true,
 105};
 106
 107static struct quirk_entry quirk_asus_et2012_type3 = {
 108        .scalar_panel_brightness = true,
 109        .store_backlight_power = true,
 110};
 111
 112static struct quirk_entry quirk_asus_x101ch = {
 113        /* We need this when ACPI function doesn't do this well */
 114        .wmi_backlight_power = true,
 115};
 116
 117static struct quirk_entry *quirks;
 118
 119static void et2012_quirks(void)
 120{
 121        const struct dmi_device *dev = NULL;
 122        char oemstring[30];
 123
 124        while ((dev = dmi_find_device(DMI_DEV_TYPE_OEM_STRING, NULL, dev))) {
 125                if (sscanf(dev->name, "AEMS%24c", oemstring) == 1) {
 126                        if (oemstring[18] == '1')
 127                                quirks = &quirk_asus_et2012_type1;
 128                        else if (oemstring[18] == '3')
 129                                quirks = &quirk_asus_et2012_type3;
 130                        break;
 131                }
 132        }
 133}
 134
 135static int dmi_matched(const struct dmi_system_id *dmi)
 136{
 137        char *model;
 138
 139        quirks = dmi->driver_data;
 140
 141        model = (char *)dmi->matches[1].substr;
 142        if (unlikely(strncmp(model, "ET2012", 6) == 0))
 143                et2012_quirks();
 144
 145        return 1;
 146}
 147
 148static struct dmi_system_id asus_quirks[] = {
 149        {
 150                .callback = dmi_matched,
 151                .ident = "ASUSTeK Computer INC. 1000H",
 152                .matches = {
 153                        DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK Computer INC."),
 154                        DMI_MATCH(DMI_PRODUCT_NAME, "1000H"),
 155                },
 156                .driver_data = &quirk_asus_1000h,
 157        },
 158        {
 159                .callback = dmi_matched,
 160                .ident = "ASUSTeK Computer INC. ET2012E/I",
 161                .matches = {
 162                        DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK Computer INC."),
 163                        DMI_MATCH(DMI_PRODUCT_NAME, "ET2012"),
 164                },
 165                .driver_data = &quirk_asus_unknown,
 166        },
 167        {
 168                .callback = dmi_matched,
 169                .ident = "ASUSTeK Computer INC. X101CH",
 170                .matches = {
 171                        DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
 172                        DMI_MATCH(DMI_PRODUCT_NAME, "X101CH"),
 173                },
 174                .driver_data = &quirk_asus_x101ch,
 175        },
 176        {
 177                .callback = dmi_matched,
 178                .ident = "ASUSTeK Computer INC. 1015CX",
 179                .matches = {
 180                        DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
 181                        DMI_MATCH(DMI_PRODUCT_NAME, "1015CX"),
 182                },
 183                .driver_data = &quirk_asus_x101ch,
 184        },
 185        {},
 186};
 187
 188static void eeepc_wmi_key_filter(struct asus_wmi_driver *asus_wmi, int *code,
 189                                 unsigned int *value, bool *autorelease)
 190{
 191        switch (*code) {
 192        case HOME_PRESS:
 193                *value = 1;
 194                *autorelease = 0;
 195                break;
 196        case HOME_HOLD:
 197                *code = ASUS_WMI_KEY_IGNORE;
 198                break;
 199        case HOME_RELEASE:
 200                *code = HOME_PRESS;
 201                *value = 0;
 202                *autorelease = 0;
 203                break;
 204        }
 205}
 206
 207static acpi_status eeepc_wmi_parse_device(acpi_handle handle, u32 level,
 208                                                 void *context, void **retval)
 209{
 210        pr_warn("Found legacy ATKD device (%s)\n", EEEPC_ACPI_HID);
 211        *(bool *)context = true;
 212        return AE_CTRL_TERMINATE;
 213}
 214
 215static int eeepc_wmi_check_atkd(void)
 216{
 217        acpi_status status;
 218        bool found = false;
 219
 220        status = acpi_get_devices(EEEPC_ACPI_HID, eeepc_wmi_parse_device,
 221                                  &found, NULL);
 222
 223        if (ACPI_FAILURE(status) || !found)
 224                return 0;
 225        return -1;
 226}
 227
 228static int eeepc_wmi_probe(struct platform_device *pdev)
 229{
 230        if (eeepc_wmi_check_atkd()) {
 231                pr_warn("WMI device present, but legacy ATKD device is also "
 232                        "present and enabled\n");
 233                pr_warn("You probably booted with acpi_osi=\"Linux\" or "
 234                        "acpi_osi=\"!Windows 2009\"\n");
 235                pr_warn("Can't load eeepc-wmi, use default acpi_osi "
 236                        "(preferred) or eeepc-laptop\n");
 237                return -EBUSY;
 238        }
 239        return 0;
 240}
 241
 242static void eeepc_wmi_quirks(struct asus_wmi_driver *driver)
 243{
 244        quirks = &quirk_asus_unknown;
 245        quirks->hotplug_wireless = hotplug_wireless;
 246
 247        dmi_check_system(asus_quirks);
 248
 249        driver->quirks = quirks;
 250        driver->quirks->wapf = -1;
 251        driver->panel_power = FB_BLANK_UNBLANK;
 252}
 253
 254static struct asus_wmi_driver asus_wmi_driver = {
 255        .name = EEEPC_WMI_FILE,
 256        .owner = THIS_MODULE,
 257        .event_guid = EEEPC_WMI_EVENT_GUID,
 258        .keymap = eeepc_wmi_keymap,
 259        .input_name = "Eee PC WMI hotkeys",
 260        .input_phys = EEEPC_WMI_FILE "/input0",
 261        .key_filter = eeepc_wmi_key_filter,
 262        .probe = eeepc_wmi_probe,
 263        .detect_quirks = eeepc_wmi_quirks,
 264};
 265
 266
 267static int __init eeepc_wmi_init(void)
 268{
 269        return asus_wmi_register_driver(&asus_wmi_driver);
 270}
 271
 272static void __exit eeepc_wmi_exit(void)
 273{
 274        asus_wmi_unregister_driver(&asus_wmi_driver);
 275}
 276
 277module_init(eeepc_wmi_init);
 278module_exit(eeepc_wmi_exit);
 279