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 bool hotplug_wireless;
  52
  53 module_param(hotplug_wireless, bool, 0444);
  54 MODULE_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
  64 static 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
  90 static 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
 109 static 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
 117 static 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
 130 static 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
 144 static 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
 166 static 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
 173 static 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
 186 static int __init eeepc_wmi_init(void)
 187 {
 188         return asus_wmi_register_driver(&asus_wmi_driver);
 189 }
 190
 191 static void __exit eeepc_wmi_exit(void)
 192 {
 193         asus_wmi_unregister_driver(&asus_wmi_driver);
 194 }
 195
 196 module_init(eeepc_wmi_init);
 197 module_exit(eeepc_wmi_exit);