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Linux/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 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);
279 

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