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
29MODULE_AUTHOR("Corentin Chary <corentin.chary@gmail.com>");
30MODULE_DESCRIPTION("Eee PC WMI Hotkey Driver");
31MODULE_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
37MODULE_ALIAS("wmi:"EEEPC_WMI_EVENT_GUID);
38
39static bool hotplug_wireless;
40
41module_param(hotplug_wireless, bool, 0444);
42MODULE_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
52static 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
83static struct quirk_entry quirk_asus_unknown = {
84};
85
86static struct quirk_entry quirk_asus_1000h = {
87	.hotplug_wireless = true,
88};
89
90static struct quirk_entry quirk_asus_et2012_type1 = {
91	.store_backlight_power = true,
92};
93
94static struct quirk_entry quirk_asus_et2012_type3 = {
95	.scalar_panel_brightness = true,
96	.store_backlight_power = true,
97};
98
99static struct quirk_entry *quirks;
100
101static void et2012_quirks(void)
102{
103	const struct dmi_device *dev = NULL;
104	char oemstring[30];
105
106	while ((dev = dmi_find_device(DMI_DEV_TYPE_OEM_STRING, NULL, dev))) {
107		if (sscanf(dev->name, "AEMS%24c", oemstring) == 1) {
108			if (oemstring[18] == '1')
109				quirks = &quirk_asus_et2012_type1;
110			else if (oemstring[18] == '3')
111				quirks = &quirk_asus_et2012_type3;
112			break;
113		}
114	}
115}
116
117static int dmi_matched(const struct dmi_system_id *dmi)
118{
119	char *model;
120
121	quirks = dmi->driver_data;
122
123	model = (char *)dmi->matches[1].substr;
124	if (unlikely(strncmp(model, "ET2012", 6) == 0))
125		et2012_quirks();
126
127	return 1;
128}
129
130static const struct dmi_system_id asus_quirks[] = {
131	{
132		.callback = dmi_matched,
133		.ident = "ASUSTeK Computer INC. 1000H",
134		.matches = {
135			DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK Computer INC."),
136			DMI_MATCH(DMI_PRODUCT_NAME, "1000H"),
137		},
138		.driver_data = &quirk_asus_1000h,
139	},
140	{
141		.callback = dmi_matched,
142		.ident = "ASUSTeK Computer INC. ET2012E/I",
143		.matches = {
144			DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK Computer INC."),
145			DMI_MATCH(DMI_PRODUCT_NAME, "ET2012"),
146		},
147		.driver_data = &quirk_asus_unknown,
148	},
149	{}
150};
151
152static void eeepc_wmi_key_filter(struct asus_wmi_driver *asus_wmi, int *code,
153				 unsigned int *value, bool *autorelease)
154{
155	switch (*code) {
156	case HOME_PRESS:
157		*value = 1;
158		*autorelease = 0;
159		break;
160	case HOME_HOLD:
161		*code = ASUS_WMI_KEY_IGNORE;
162		break;
163	case HOME_RELEASE:
164		*code = HOME_PRESS;
165		*value = 0;
166		*autorelease = 0;
167		break;
168	}
169}
170
171static int eeepc_wmi_probe(struct platform_device *pdev)
172{
173	if (acpi_dev_found(EEEPC_ACPI_HID)) {
174		pr_warn("Found legacy ATKD device (%s)\n", EEEPC_ACPI_HID);
175		pr_warn("WMI device present, but legacy ATKD device is also "
176			"present and enabled\n");
177		pr_warn("You probably booted with acpi_osi=\"Linux\" or "
178			"acpi_osi=\"!Windows 2009\"\n");
179		pr_warn("Can't load eeepc-wmi, use default acpi_osi "
180			"(preferred) or eeepc-laptop\n");
181		return -EBUSY;
182	}
183	return 0;
184}
185
186static void eeepc_wmi_quirks(struct asus_wmi_driver *driver)
187{
188	quirks = &quirk_asus_unknown;
189	quirks->hotplug_wireless = hotplug_wireless;
190
191	dmi_check_system(asus_quirks);
192
193	driver->quirks = quirks;
194	driver->quirks->wapf = -1;
195	driver->panel_power = FB_BLANK_UNBLANK;
196}
197
198static struct asus_wmi_driver asus_wmi_driver = {
199	.name = EEEPC_WMI_FILE,
200	.owner = THIS_MODULE,
201	.event_guid = EEEPC_WMI_EVENT_GUID,
202	.keymap = eeepc_wmi_keymap,
203	.input_name = "Eee PC WMI hotkeys",
204	.input_phys = EEEPC_WMI_FILE "/input0",
205	.key_filter = eeepc_wmi_key_filter,
206	.probe = eeepc_wmi_probe,
207	.detect_quirks = eeepc_wmi_quirks,
208};
209
210
211static int __init eeepc_wmi_init(void)
212{
213	return asus_wmi_register_driver(&asus_wmi_driver);
214}
215
216static void __exit eeepc_wmi_exit(void)
217{
218	asus_wmi_unregister_driver(&asus_wmi_driver);
219}
220
221module_init(eeepc_wmi_init);
222module_exit(eeepc_wmi_exit);
223