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
42MODULE_AUTHOR("Corentin Chary <corentin.chary@gmail.com>");
43MODULE_DESCRIPTION("Eee PC WMI Hotkey Driver");
44MODULE_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
50MODULE_ALIAS("wmi:"EEEPC_WMI_EVENT_GUID);
51
52static bool hotplug_wireless;
53
54module_param(hotplug_wireless, bool, 0444);
55MODULE_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
65static 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
96static struct quirk_entry quirk_asus_unknown = {
97};
98
99static struct quirk_entry quirk_asus_1000h = {
100	.hotplug_wireless = true,
101};
102
103static struct quirk_entry quirk_asus_et2012_type1 = {
104	.store_backlight_power = true,
105};
106
107static struct quirk_entry quirk_asus_et2012_type3 = {
108	.scalar_panel_brightness = true,
109	.store_backlight_power = true,
110};
111
112static 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
117static struct quirk_entry *quirks;
118
119static 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
135static 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
148static 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
188static 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
207static 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
215static 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
228static 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
242static 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
254static 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
267static int __init eeepc_wmi_init(void)
268{
269	return asus_wmi_register_driver(&asus_wmi_driver);
270}
271
272static void __exit eeepc_wmi_exit(void)
273{
274	asus_wmi_unregister_driver(&asus_wmi_driver);
275}
276
277module_init(eeepc_wmi_init);
278module_exit(eeepc_wmi_exit);
279