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 static const struct key_entry eeepc_wmi_keymap[] = {
  60         /* Sleep already handled via generic ACPI code */
  61         { KE_KEY, 0x30, { KEY_VOLUMEUP } },
  62         { KE_KEY, 0x31, { KEY_VOLUMEDOWN } },
  63         { KE_KEY, 0x32, { KEY_MUTE } },
  64         { KE_KEY, 0x5c, { KEY_F15 } }, /* Power Gear key */
  65         { KE_KEY, 0x5d, { KEY_WLAN } },
  66         { KE_KEY, 0x6b, { KEY_TOUCHPAD_TOGGLE } }, /* Toggle Touchpad */
  67         { KE_KEY, 0x82, { KEY_CAMERA } },
  68         { KE_KEY, 0x83, { KEY_CAMERA_ZOOMIN } },
  69         { KE_KEY, 0x88, { KEY_WLAN } },
  70         { KE_KEY, 0xbd, { KEY_CAMERA } },
  71         { KE_KEY, 0xcc, { KEY_SWITCHVIDEOMODE } },
  72         { KE_KEY, 0xe0, { KEY_PROG1 } }, /* Task Manager */
  73         { KE_KEY, 0xe1, { KEY_F14 } }, /* Change Resolution */
  74         { KE_KEY, 0xe8, { KEY_SCREENLOCK } },
  75         { KE_KEY, 0xe9, { KEY_BRIGHTNESS_ZERO } },
  76         { KE_KEY, 0xeb, { KEY_CAMERA_ZOOMOUT } },
  77         { KE_KEY, 0xec, { KEY_CAMERA_UP } },
  78         { KE_KEY, 0xed, { KEY_CAMERA_DOWN } },
  79         { KE_KEY, 0xee, { KEY_CAMERA_LEFT } },
  80         { KE_KEY, 0xef, { KEY_CAMERA_RIGHT } },
  81         { KE_END, 0},
  82 };
  83
  84 static acpi_status eeepc_wmi_parse_device(acpi_handle handle, u32 level,
  85                                                  void *context, void **retval)
  86 {
  87         pr_warn("Found legacy ATKD device (%s)\n", EEEPC_ACPI_HID);
  88         *(bool *)context = true;
  89         return AE_CTRL_TERMINATE;
  90 }
  91
  92 static int eeepc_wmi_check_atkd(void)
  93 {
  94         acpi_status status;
  95         bool found = false;
  96
  97         status = acpi_get_devices(EEEPC_ACPI_HID, eeepc_wmi_parse_device,
  98                                   &found, NULL);
  99
 100         if (ACPI_FAILURE(status) || !found)
 101                 return 0;
 102         return -1;
 103 }
 104
 105 static int eeepc_wmi_probe(struct platform_device *pdev)
 106 {
 107         if (eeepc_wmi_check_atkd()) {
 108                 pr_warn("WMI device present, but legacy ATKD device is also "
 109                         "present and enabled\n");
 110                 pr_warn("You probably booted with acpi_osi=\"Linux\" or "
 111                         "acpi_osi=\"!Windows 2009\"\n");
 112                 pr_warn("Can't load eeepc-wmi, use default acpi_osi "
 113                         "(preferred) or eeepc-laptop\n");
 114                 return -EBUSY;
 115         }
 116         return 0;
 117 }
 118
 119 static void eeepc_dmi_check(struct asus_wmi_driver *driver)
 120 {
 121         const char *model;
 122
 123         model = dmi_get_system_info(DMI_PRODUCT_NAME);
 124         if (!model)
 125                 return;
 126
 127         /*
 128          * Whitelist for wlan hotplug
 129          *
 130          * Asus 1000H needs the current hotplug code to handle
 131          * Fn+F2 correctly. We may add other Asus here later, but
 132          * it seems that most of the laptops supported by asus-wmi
 133          * don't need to be on this list
 134          */
 135         if (strcmp(model, "1000H") == 0) {
 136                 driver->hotplug_wireless = true;
 137                 pr_info("wlan hotplug enabled\n");
 138         }
 139 }
 140
 141 static void eeepc_wmi_quirks(struct asus_wmi_driver *driver)
 142 {
 143         driver->hotplug_wireless = hotplug_wireless;
 144         eeepc_dmi_check(driver);
 145 }
 146
 147 static struct asus_wmi_driver asus_wmi_driver = {
 148         .name = EEEPC_WMI_FILE,
 149         .owner = THIS_MODULE,
 150         .event_guid = EEEPC_WMI_EVENT_GUID,
 151         .keymap = eeepc_wmi_keymap,
 152         .input_name = "Eee PC WMI hotkeys",
 153         .input_phys = EEEPC_WMI_FILE "/input0",
 154         .probe = eeepc_wmi_probe,
 155         .quirks = eeepc_wmi_quirks,
 156 };
 157
 158
 159 static int __init eeepc_wmi_init(void)
 160 {
 161         return asus_wmi_register_driver(&asus_wmi_driver);
 162 }
 163
 164 static void __exit eeepc_wmi_exit(void)
 165 {
 166         asus_wmi_unregister_driver(&asus_wmi_driver);
 167 }
 168
 169 module_init(eeepc_wmi_init);
 170 module_exit(eeepc_wmi_exit);