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