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