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