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 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_type1 = {
 102         .store_backlight_power = true,
 103 };
 104
 105 static struct quirk_entry quirk_asus_et2012_type3 = {
 106         .scalar_panel_brightness = true,
 107         .store_backlight_power = true,
 108 };
 109
 110 static struct quirk_entry *quirks;
 111
 112 static void et2012_quirks(void)
 113 {
 114         const struct dmi_device *dev = NULL;
 115         char oemstring[30];
 116
 117         while ((dev = dmi_find_device(DMI_DEV_TYPE_OEM_STRING, NULL, dev))) {
 118                 if (sscanf(dev->name, "AEMS%24c", oemstring) == 1) {
 119                         if (oemstring[18] == '1')
 120                                 quirks = &quirk_asus_et2012_type1;
 121                         else if (oemstring[18] == '3')
 122                                 quirks = &quirk_asus_et2012_type3;
 123                         break;
 124                 }
 125         }
 126 }
 127
 128 static int dmi_matched(const struct dmi_system_id *dmi)
 129 {
 130         char *model;
 131
 132         quirks = dmi->driver_data;
 133
 134         model = (char *)dmi->matches[1].substr;
 135         if (unlikely(strncmp(model, "ET2012", 6) == 0))
 136                 et2012_quirks();
 137
 138         return 1;
 139 }
 140
 141 static struct dmi_system_id asus_quirks[] = {
 142         {
 143                 .callback = dmi_matched,
 144                 .ident = "ASUSTeK Computer INC. 1000H",
 145                 .matches = {
 146                         DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK Computer INC."),
 147                         DMI_MATCH(DMI_PRODUCT_NAME, "1000H"),
 148                 },
 149                 .driver_data = &quirk_asus_1000h,
 150         },
 151         {
 152                 .callback = dmi_matched,
 153                 .ident = "ASUSTeK Computer INC. ET2012E/I",
 154                 .matches = {
 155                         DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK Computer INC."),
 156                         DMI_MATCH(DMI_PRODUCT_NAME, "ET2012"),
 157                 },
 158                 .driver_data = &quirk_asus_unknown,
 159         },
 160         {},
 161 };
 162
 163 static void eeepc_wmi_key_filter(struct asus_wmi_driver *asus_wmi, int *code,
 164                                  unsigned int *value, bool *autorelease)
 165 {
 166         switch (*code) {
 167         case HOME_PRESS:
 168                 *value = 1;
 169                 *autorelease = 0;
 170                 break;
 171         case HOME_HOLD:
 172                 *code = ASUS_WMI_KEY_IGNORE;
 173                 break;
 174         case HOME_RELEASE:
 175                 *code = HOME_PRESS;
 176                 *value = 0;
 177                 *autorelease = 0;
 178                 break;
 179         }
 180 }
 181
 182 static acpi_status eeepc_wmi_parse_device(acpi_handle handle, u32 level,
 183                                                  void *context, void **retval)
 184 {
 185         pr_warn("Found legacy ATKD device (%s)\n", EEEPC_ACPI_HID);
 186         *(bool *)context = true;
 187         return AE_CTRL_TERMINATE;
 188 }
 189
 190 static int eeepc_wmi_check_atkd(void)
 191 {
 192         acpi_status status;
 193         bool found = false;
 194
 195         status = acpi_get_devices(EEEPC_ACPI_HID, eeepc_wmi_parse_device,
 196                                   &found, NULL);
 197
 198         if (ACPI_FAILURE(status) || !found)
 199                 return 0;
 200         return -1;
 201 }
 202
 203 static int eeepc_wmi_probe(struct platform_device *pdev)
 204 {
 205         if (eeepc_wmi_check_atkd()) {
 206                 pr_warn("WMI device present, but legacy ATKD device is also "
 207                         "present and enabled\n");
 208                 pr_warn("You probably booted with acpi_osi=\"Linux\" or "
 209                         "acpi_osi=\"!Windows 2009\"\n");
 210                 pr_warn("Can't load eeepc-wmi, use default acpi_osi "
 211                         "(preferred) or eeepc-laptop\n");
 212                 return -EBUSY;
 213         }
 214         return 0;
 215 }
 216
 217 static void eeepc_wmi_quirks(struct asus_wmi_driver *driver)
 218 {
 219         quirks = &quirk_asus_unknown;
 220         quirks->hotplug_wireless = hotplug_wireless;
 221
 222         dmi_check_system(asus_quirks);
 223
 224         driver->quirks = quirks;
 225         driver->quirks->wapf = -1;
 226         driver->panel_power = FB_BLANK_UNBLANK;
 227 }
 228
 229 static struct asus_wmi_driver asus_wmi_driver = {
 230         .name = EEEPC_WMI_FILE,
 231         .owner = THIS_MODULE,
 232         .event_guid = EEEPC_WMI_EVENT_GUID,
 233         .keymap = eeepc_wmi_keymap,
 234         .input_name = "Eee PC WMI hotkeys",
 235         .input_phys = EEEPC_WMI_FILE "/input0",
 236         .key_filter = eeepc_wmi_key_filter,
 237         .probe = eeepc_wmi_probe,
 238         .detect_quirks = eeepc_wmi_quirks,
 239 };
 240
 241
 242 static int __init eeepc_wmi_init(void)
 243 {
 244         return asus_wmi_register_driver(&asus_wmi_driver);
 245 }
 246
 247 static void __exit eeepc_wmi_exit(void)
 248 {
 249         asus_wmi_unregister_driver(&asus_wmi_driver);
 250 }
 251
 252 module_init(eeepc_wmi_init);
 253 module_exit(eeepc_wmi_exit);