kernel/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 <linux/acpi.h>
  37
  38 #include "asus-wmi.h"
  39
  40 #define EEEPC_WMI_FILE  "eeepc-wmi"
  41
  42 MODULE_AUTHOR("Corentin Chary <corentin.chary@gmail.com>");
  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         { KE_KEY, ASUS_WMI_BRN_DOWN, { KEY_BRIGHTNESSDOWN } },
  67         { KE_KEY, ASUS_WMI_BRN_UP, { KEY_BRIGHTNESSUP } },
  68         /* Sleep already handled via generic ACPI code */
  69         { KE_KEY, 0x30, { KEY_VOLUMEUP } },
  70         { KE_KEY, 0x31, { KEY_VOLUMEDOWN } },
  71         { KE_KEY, 0x32, { KEY_MUTE } },
  72         { KE_KEY, 0x5c, { KEY_F15 } }, /* Power Gear key */
  73         { KE_KEY, 0x5d, { KEY_WLAN } },
  74         { KE_KEY, 0x6b, { KEY_TOUCHPAD_TOGGLE } }, /* Toggle Touchpad */
  75         { KE_KEY, 0x82, { KEY_CAMERA } },
  76         { KE_KEY, 0x83, { KEY_CAMERA_ZOOMIN } },
  77         { KE_KEY, 0x88, { KEY_WLAN } },
  78         { KE_KEY, 0xbd, { KEY_CAMERA } },
  79         { KE_KEY, 0xcc, { KEY_SWITCHVIDEOMODE } },
  80         { KE_KEY, 0xe0, { KEY_PROG1 } }, /* Task Manager */
  81         { KE_KEY, 0xe1, { KEY_F14 } }, /* Change Resolution */
  82         { KE_KEY, HOME_PRESS, { KEY_CONFIG } }, /* Home/Express gate key */
  83         { KE_KEY, 0xe8, { KEY_SCREENLOCK } },
  84         { KE_KEY, 0xe9, { KEY_DISPLAYTOGGLE } },
  85         { KE_KEY, 0xeb, { KEY_CAMERA_ZOOMOUT } },
  86         { KE_KEY, 0xec, { KEY_CAMERA_UP } },
  87         { KE_KEY, 0xed, { KEY_CAMERA_DOWN } },
  88         { KE_KEY, 0xee, { KEY_CAMERA_LEFT } },
  89         { KE_KEY, 0xef, { KEY_CAMERA_RIGHT } },
  90         { KE_KEY, 0xf3, { KEY_MENU } },
  91         { KE_KEY, 0xf5, { KEY_HOMEPAGE } },
  92         { KE_KEY, 0xf6, { KEY_ESC } },
  93         { KE_END, 0},
  94 };
  95
  96 static struct quirk_entry quirk_asus_unknown = {
  97 };
  98
  99 static struct quirk_entry quirk_asus_1000h = {
 100         .hotplug_wireless = true,
 101 };
 102
 103 static struct quirk_entry quirk_asus_et2012_type1 = {
 104         .store_backlight_power = true,
 105 };
 106
 107 static struct quirk_entry quirk_asus_et2012_type3 = {
 108         .scalar_panel_brightness = true,
 109         .store_backlight_power = true,
 110 };
 111
 112 static struct quirk_entry quirk_asus_x101ch = {
 113         /* We need this when ACPI function doesn't do this well */
 114         .wmi_backlight_power = true,
 115 };
 116
 117 static struct quirk_entry *quirks;
 118
 119 static void et2012_quirks(void)
 120 {
 121         const struct dmi_device *dev = NULL;
 122         char oemstring[30];
 123
 124         while ((dev = dmi_find_device(DMI_DEV_TYPE_OEM_STRING, NULL, dev))) {
 125                 if (sscanf(dev->name, "AEMS%24c", oemstring) == 1) {
 126                         if (oemstring[18] == '1')
 127                                 quirks = &quirk_asus_et2012_type1;
 128                         else if (oemstring[18] == '3')
 129                                 quirks = &quirk_asus_et2012_type3;
 130                         break;
 131                 }
 132         }
 133 }
 134
 135 static int dmi_matched(const struct dmi_system_id *dmi)
 136 {
 137         char *model;
 138
 139         quirks = dmi->driver_data;
 140
 141         model = (char *)dmi->matches[1].substr;
 142         if (unlikely(strncmp(model, "ET2012", 6) == 0))
 143                 et2012_quirks();
 144
 145         return 1;
 146 }
 147
 148 static const struct dmi_system_id asus_quirks[] = {
 149         {
 150                 .callback = dmi_matched,
 151                 .ident = "ASUSTeK Computer INC. 1000H",
 152                 .matches = {
 153                         DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK Computer INC."),
 154                         DMI_MATCH(DMI_PRODUCT_NAME, "1000H"),
 155                 },
 156                 .driver_data = &quirk_asus_1000h,
 157         },
 158         {
 159                 .callback = dmi_matched,
 160                 .ident = "ASUSTeK Computer INC. ET2012E/I",
 161                 .matches = {
 162                         DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK Computer INC."),
 163                         DMI_MATCH(DMI_PRODUCT_NAME, "ET2012"),
 164                 },
 165                 .driver_data = &quirk_asus_unknown,
 166         },
 167         {
 168                 .callback = dmi_matched,
 169                 .ident = "ASUSTeK Computer INC. X101CH",
 170                 .matches = {
 171                         DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
 172                         DMI_MATCH(DMI_PRODUCT_NAME, "X101CH"),
 173                 },
 174                 .driver_data = &quirk_asus_x101ch,
 175         },
 176         {
 177                 .callback = dmi_matched,
 178                 .ident = "ASUSTeK Computer INC. 1015CX",
 179                 .matches = {
 180                         DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
 181                         DMI_MATCH(DMI_PRODUCT_NAME, "1015CX"),
 182                 },
 183                 .driver_data = &quirk_asus_x101ch,
 184         },
 185         {},
 186 };
 187
 188 static void eeepc_wmi_key_filter(struct asus_wmi_driver *asus_wmi, int *code,
 189                                  unsigned int *value, bool *autorelease)
 190 {
 191         switch (*code) {
 192         case HOME_PRESS:
 193                 *value = 1;
 194                 *autorelease = 0;
 195                 break;
 196         case HOME_HOLD:
 197                 *code = ASUS_WMI_KEY_IGNORE;
 198                 break;
 199         case HOME_RELEASE:
 200                 *code = HOME_PRESS;
 201                 *value = 0;
 202                 *autorelease = 0;
 203                 break;
 204         }
 205 }
 206
 207 static acpi_status eeepc_wmi_parse_device(acpi_handle handle, u32 level,
 208                                                  void *context, void **retval)
 209 {
 210         pr_warn("Found legacy ATKD device (%s)\n", EEEPC_ACPI_HID);
 211         *(bool *)context = true;
 212         return AE_CTRL_TERMINATE;
 213 }
 214
 215 static int eeepc_wmi_check_atkd(void)
 216 {
 217         acpi_status status;
 218         bool found = false;
 219
 220         status = acpi_get_devices(EEEPC_ACPI_HID, eeepc_wmi_parse_device,
 221                                   &found, NULL);
 222
 223         if (ACPI_FAILURE(status) || !found)
 224                 return 0;
 225         return -1;
 226 }
 227
 228 static int eeepc_wmi_probe(struct platform_device *pdev)
 229 {
 230         if (eeepc_wmi_check_atkd()) {
 231                 pr_warn("WMI device present, but legacy ATKD device is also "
 232                         "present and enabled\n");
 233                 pr_warn("You probably booted with acpi_osi=\"Linux\" or "
 234                         "acpi_osi=\"!Windows 2009\"\n");
 235                 pr_warn("Can't load eeepc-wmi, use default acpi_osi "
 236                         "(preferred) or eeepc-laptop\n");
 237                 return -EBUSY;
 238         }
 239         return 0;
 240 }
 241
 242 static void eeepc_wmi_quirks(struct asus_wmi_driver *driver)
 243 {
 244         quirks = &quirk_asus_unknown;
 245         quirks->hotplug_wireless = hotplug_wireless;
 246
 247         dmi_check_system(asus_quirks);
 248
 249         driver->quirks = quirks;
 250         driver->quirks->wapf = -1;
 251         driver->panel_power = FB_BLANK_UNBLANK;
 252 }
 253
 254 static struct asus_wmi_driver asus_wmi_driver = {
 255         .name = EEEPC_WMI_FILE,
 256         .owner = THIS_MODULE,
 257         .event_guid = EEEPC_WMI_EVENT_GUID,
 258         .keymap = eeepc_wmi_keymap,
 259         .input_name = "Eee PC WMI hotkeys",
 260         .input_phys = EEEPC_WMI_FILE "/input0",
 261         .key_filter = eeepc_wmi_key_filter,
 262         .probe = eeepc_wmi_probe,
 263         .detect_quirks = eeepc_wmi_quirks,
 264 };
 265
 266
 267 static int __init eeepc_wmi_init(void)
 268 {
 269         return asus_wmi_register_driver(&asus_wmi_driver);
 270 }
 271
 272 static void __exit eeepc_wmi_exit(void)
 273 {
 274         asus_wmi_unregister_driver(&asus_wmi_driver);
 275 }
 276
 277 module_init(eeepc_wmi_init);
 278 module_exit(eeepc_wmi_exit);