drivers/platform/x86/eeepc-wmi.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * Eee PC WMI hotkey driver
   4  *
   5  * Copyright(C) 2010 Intel Corporation.
   6  * Copyright(C) 2010-2011 Corentin Chary <corentin.chary@gmail.com>
   7  *
   8  * Portions based on wistron_btns.c:
   9  * Copyright (C) 2005 Miloslav Trmac <mitr@volny.cz>
  10  * Copyright (C) 2005 Bernhard Rosenkraenzer <bero@arklinux.org>
  11  * Copyright (C) 2005 Dmitry Torokhov <dtor@mail.ru>
  12  */
  13
  14 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  15
  16 #include <linux/kernel.h>
  17 #include <linux/module.h>
  18 #include <linux/init.h>
  19 #include <linux/input.h>
  20 #include <linux/input/sparse-keymap.h>
  21 #include <linux/dmi.h>
  22 #include <linux/fb.h>
  23 #include <linux/acpi.h>
  24
  25 #include "asus-wmi.h"
  26
  27 #define EEEPC_WMI_FILE  "eeepc-wmi"
  28
  29 MODULE_AUTHOR("Corentin Chary <corentin.chary@gmail.com>");
  30 MODULE_DESCRIPTION("Eee PC WMI Hotkey Driver");
  31 MODULE_LICENSE("GPL");
  32
  33 #define EEEPC_ACPI_HID          "ASUS010" /* old _HID used in eeepc-laptop */
  34
  35 #define EEEPC_WMI_EVENT_GUID    "ABBC0F72-8EA1-11D1-00A0-C90629100000"
  36
  37 MODULE_ALIAS("wmi:"EEEPC_WMI_EVENT_GUID);
  38
  39 static bool hotplug_wireless;
  40
  41 module_param(hotplug_wireless, bool, 0444);
  42 MODULE_PARM_DESC(hotplug_wireless,
  43                  "Enable hotplug for wireless device. "
  44                  "If your laptop needs that, please report to "
  45                  "acpi4asus-user@lists.sourceforge.net.");
  46
  47 /* Values for T101MT "Home" key */
  48 #define HOME_PRESS      0xe4
  49 #define HOME_HOLD       0xea
  50 #define HOME_RELEASE    0xe5
  51
  52 static const struct key_entry eeepc_wmi_keymap[] = {
  53         { KE_KEY, ASUS_WMI_BRN_DOWN, { KEY_BRIGHTNESSDOWN } },
  54         { KE_KEY, ASUS_WMI_BRN_UP, { KEY_BRIGHTNESSUP } },
  55         /* Sleep already handled via generic ACPI code */
  56         { KE_KEY, 0x30, { KEY_VOLUMEUP } },
  57         { KE_KEY, 0x31, { KEY_VOLUMEDOWN } },
  58         { KE_KEY, 0x32, { KEY_MUTE } },
  59         { KE_KEY, 0x5c, { KEY_F15 } }, /* Power Gear key */
  60         { KE_KEY, 0x5d, { KEY_WLAN } },
  61         { KE_KEY, 0x6b, { KEY_TOUCHPAD_TOGGLE } }, /* Toggle Touchpad */
  62         { KE_KEY, 0x82, { KEY_CAMERA } },
  63         { KE_KEY, 0x83, { KEY_CAMERA_ZOOMIN } },
  64         { KE_KEY, 0x88, { KEY_WLAN } },
  65         { KE_KEY, 0xbd, { KEY_CAMERA } },
  66         { KE_KEY, 0xcc, { KEY_SWITCHVIDEOMODE } },
  67         { KE_KEY, 0xe0, { KEY_PROG1 } }, /* Task Manager */
  68         { KE_KEY, 0xe1, { KEY_F14 } }, /* Change Resolution */
  69         { KE_KEY, HOME_PRESS, { KEY_CONFIG } }, /* Home/Express gate key */
  70         { KE_KEY, 0xe8, { KEY_SCREENLOCK } },
  71         { KE_KEY, 0xe9, { KEY_DISPLAYTOGGLE } },
  72         { KE_KEY, 0xeb, { KEY_CAMERA_ZOOMOUT } },
  73         { KE_KEY, 0xec, { KEY_CAMERA_UP } },
  74         { KE_KEY, 0xed, { KEY_CAMERA_DOWN } },
  75         { KE_KEY, 0xee, { KEY_CAMERA_LEFT } },
  76         { KE_KEY, 0xef, { KEY_CAMERA_RIGHT } },
  77         { KE_KEY, 0xf3, { KEY_MENU } },
  78         { KE_KEY, 0xf5, { KEY_HOMEPAGE } },
  79         { KE_KEY, 0xf6, { KEY_ESC } },
  80         { KE_END, 0},
  81 };
  82
  83 static struct quirk_entry quirk_asus_unknown = {
  84 };
  85
  86 static struct quirk_entry quirk_asus_1000h = {
  87         .hotplug_wireless = true,
  88 };
  89
  90 static struct quirk_entry quirk_asus_et2012_type1 = {
  91         .store_backlight_power = true,
  92 };
  93
  94 static struct quirk_entry quirk_asus_et2012_type3 = {
  95         .scalar_panel_brightness = true,
  96         .store_backlight_power = true,
  97 };
  98
  99 static struct quirk_entry quirk_asus_x101ch = {
 100         /* We need this when ACPI function doesn't do this well */
 101         .wmi_backlight_power = true,
 102 };
 103
 104 static struct quirk_entry *quirks;
 105
 106 static void et2012_quirks(void)
 107 {
 108         const struct dmi_device *dev = NULL;
 109         char oemstring[30];
 110
 111         while ((dev = dmi_find_device(DMI_DEV_TYPE_OEM_STRING, NULL, dev))) {
 112                 if (sscanf(dev->name, "AEMS%24c", oemstring) == 1) {
 113                         if (oemstring[18] == '1')
 114                                 quirks = &quirk_asus_et2012_type1;
 115                         else if (oemstring[18] == '3')
 116                                 quirks = &quirk_asus_et2012_type3;
 117                         break;
 118                 }
 119         }
 120 }
 121
 122 static int dmi_matched(const struct dmi_system_id *dmi)
 123 {
 124         char *model;
 125
 126         quirks = dmi->driver_data;
 127
 128         model = (char *)dmi->matches[1].substr;
 129         if (unlikely(strncmp(model, "ET2012", 6) == 0))
 130                 et2012_quirks();
 131
 132         return 1;
 133 }
 134
 135 static const struct dmi_system_id asus_quirks[] = {
 136         {
 137                 .callback = dmi_matched,
 138                 .ident = "ASUSTeK Computer INC. 1000H",
 139                 .matches = {
 140                         DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK Computer INC."),
 141                         DMI_MATCH(DMI_PRODUCT_NAME, "1000H"),
 142                 },
 143                 .driver_data = &quirk_asus_1000h,
 144         },
 145         {
 146                 .callback = dmi_matched,
 147                 .ident = "ASUSTeK Computer INC. ET2012E/I",
 148                 .matches = {
 149                         DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK Computer INC."),
 150                         DMI_MATCH(DMI_PRODUCT_NAME, "ET2012"),
 151                 },
 152                 .driver_data = &quirk_asus_unknown,
 153         },
 154         {
 155                 .callback = dmi_matched,
 156                 .ident = "ASUSTeK Computer INC. X101CH",
 157                 .matches = {
 158                         DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
 159                         DMI_MATCH(DMI_PRODUCT_NAME, "X101CH"),
 160                 },
 161                 .driver_data = &quirk_asus_x101ch,
 162         },
 163         {
 164                 .callback = dmi_matched,
 165                 .ident = "ASUSTeK Computer INC. 1015CX",
 166                 .matches = {
 167                         DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
 168                         DMI_MATCH(DMI_PRODUCT_NAME, "1015CX"),
 169                 },
 170                 .driver_data = &quirk_asus_x101ch,
 171         },
 172         {},
 173 };
 174
 175 static void eeepc_wmi_key_filter(struct asus_wmi_driver *asus_wmi, int *code,
 176                                  unsigned int *value, bool *autorelease)
 177 {
 178         switch (*code) {
 179         case HOME_PRESS:
 180                 *value = 1;
 181                 *autorelease = 0;
 182                 break;
 183         case HOME_HOLD:
 184                 *code = ASUS_WMI_KEY_IGNORE;
 185                 break;
 186         case HOME_RELEASE:
 187                 *code = HOME_PRESS;
 188                 *value = 0;
 189                 *autorelease = 0;
 190                 break;
 191         }
 192 }
 193
 194 static int eeepc_wmi_probe(struct platform_device *pdev)
 195 {
 196         if (acpi_dev_found(EEEPC_ACPI_HID)) {
 197                 pr_warn("Found legacy ATKD device (%s)\n", EEEPC_ACPI_HID);
 198                 pr_warn("WMI device present, but legacy ATKD device is also "
 199                         "present and enabled\n");
 200                 pr_warn("You probably booted with acpi_osi=\"Linux\" or "
 201                         "acpi_osi=\"!Windows 2009\"\n");
 202                 pr_warn("Can't load eeepc-wmi, use default acpi_osi "
 203                         "(preferred) or eeepc-laptop\n");
 204                 return -EBUSY;
 205         }
 206         return 0;
 207 }
 208
 209 static void eeepc_wmi_quirks(struct asus_wmi_driver *driver)
 210 {
 211         quirks = &quirk_asus_unknown;
 212         quirks->hotplug_wireless = hotplug_wireless;
 213
 214         dmi_check_system(asus_quirks);
 215
 216         driver->quirks = quirks;
 217         driver->quirks->wapf = -1;
 218         driver->panel_power = FB_BLANK_UNBLANK;
 219 }
 220
 221 static struct asus_wmi_driver asus_wmi_driver = {
 222         .name = EEEPC_WMI_FILE,
 223         .owner = THIS_MODULE,
 224         .event_guid = EEEPC_WMI_EVENT_GUID,
 225         .keymap = eeepc_wmi_keymap,
 226         .input_name = "Eee PC WMI hotkeys",
 227         .input_phys = EEEPC_WMI_FILE "/input0",
 228         .key_filter = eeepc_wmi_key_filter,
 229         .probe = eeepc_wmi_probe,
 230         .detect_quirks = eeepc_wmi_quirks,
 231 };
 232
 233
 234 static int __init eeepc_wmi_init(void)
 235 {
 236         return asus_wmi_register_driver(&asus_wmi_driver);
 237 }
 238
 239 static void __exit eeepc_wmi_exit(void)
 240 {
 241         asus_wmi_unregister_driver(&asus_wmi_driver);
 242 }
 243
 244 module_init(eeepc_wmi_init);
 245 module_exit(eeepc_wmi_exit);