[mirror_ubuntu-bionic-kernel.git] / drivers / platform / x86 / eeepc-wmi.c

/*
 * Eee PC WMI hotkey driver
 *
 * Copyright(C) 2010 Intel Corporation.
 *
 * Portions based on wistron_btns.c:
 * Copyright (C) 2005 Miloslav Trmac <mitr@volny.cz>
 * Copyright (C) 2005 Bernhard Rosenkraenzer <bero@arklinux.org>
 * Copyright (C) 2005 Dmitry Torokhov <dtor@mail.ru>
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/types.h>
#include <linux/input.h>
#include <linux/input/sparse-keymap.h>
#include <acpi/acpi_bus.h>
#include <acpi/acpi_drivers.h>

MODULE_AUTHOR("Yong Wang <yong.y.wang@intel.com>");
MODULE_DESCRIPTION("Eee PC WMI Hotkey Driver");
MODULE_LICENSE("GPL");

#define EEEPC_WMI_EVENT_GUID	"ABBC0F72-8EA1-11D1-00A0-C90629100000"

MODULE_ALIAS("wmi:"EEEPC_WMI_EVENT_GUID);

#define NOTIFY_BRNUP_MIN	0x11
#define NOTIFY_BRNUP_MAX	0x1f
#define NOTIFY_BRNDOWN_MIN	0x20
#define NOTIFY_BRNDOWN_MAX	0x2e

static const struct key_entry eeepc_wmi_keymap[] = {
	/* Sleep already handled via generic ACPI code */
	{ KE_KEY, 0x5d, { KEY_WLAN } },
	{ KE_KEY, 0x32, { KEY_MUTE } },
	{ KE_KEY, 0x31, { KEY_VOLUMEDOWN } },
	{ KE_KEY, 0x30, { KEY_VOLUMEUP } },
	{ KE_IGNORE, NOTIFY_BRNDOWN_MIN, { KEY_BRIGHTNESSDOWN } },
	{ KE_IGNORE, NOTIFY_BRNUP_MIN, { KEY_BRIGHTNESSUP } },
	{ KE_KEY, 0xcc, { KEY_SWITCHVIDEOMODE } },
	{ KE_END, 0},
};

static struct input_dev *eeepc_wmi_input_dev;

static void eeepc_wmi_notify(u32 value, void *context)
{
	struct acpi_buffer response = { ACPI_ALLOCATE_BUFFER, NULL };
	union acpi_object *obj;
	acpi_status status;
	int code;

	status = wmi_get_event_data(value, &response);
	if (status != AE_OK) {
		pr_err("EEEPC WMI: bad event status 0x%x\n", status);
		return;
	}

	obj = (union acpi_object *)response.pointer;

	if (obj && obj->type == ACPI_TYPE_INTEGER) {
		code = obj->integer.value;

		if (code >= NOTIFY_BRNUP_MIN && code <= NOTIFY_BRNUP_MAX)
			code = NOTIFY_BRNUP_MIN;
		else if (code >= NOTIFY_BRNDOWN_MIN && code <= NOTIFY_BRNDOWN_MAX)
			code = NOTIFY_BRNDOWN_MIN;

		if (!sparse_keymap_report_event(eeepc_wmi_input_dev,
						code, 1, true))
			pr_info("EEEPC WMI: Unknown key %x pressed\n", code);
	}

	kfree(obj);
}

static int eeepc_wmi_input_setup(void)
{
	int err;

	eeepc_wmi_input_dev = input_allocate_device();
	if (!eeepc_wmi_input_dev)
		return -ENOMEM;

	eeepc_wmi_input_dev->name = "Eee PC WMI hotkeys";
	eeepc_wmi_input_dev->phys = "wmi/input0";
	eeepc_wmi_input_dev->id.bustype = BUS_HOST;

	err = sparse_keymap_setup(eeepc_wmi_input_dev, eeepc_wmi_keymap, NULL);
	if (err)
		goto err_free_dev;

	err = input_register_device(eeepc_wmi_input_dev);
	if (err)
		goto err_free_keymap;

	return 0;

err_free_keymap:
	sparse_keymap_free(eeepc_wmi_input_dev);
err_free_dev:
	input_free_device(eeepc_wmi_input_dev);
	return err;
}

static int __init eeepc_wmi_init(void)
{
	int err;
	acpi_status status;

	if (!wmi_has_guid(EEEPC_WMI_EVENT_GUID)) {
		pr_warning("EEEPC WMI: No known WMI GUID found\n");
		return -ENODEV;
	}

	err = eeepc_wmi_input_setup();
	if (err)
		return err;

	status = wmi_install_notify_handler(EEEPC_WMI_EVENT_GUID,
					eeepc_wmi_notify, NULL);
	if (ACPI_FAILURE(status)) {
		sparse_keymap_free(eeepc_wmi_input_dev);
		input_unregister_device(eeepc_wmi_input_dev);
		pr_err("EEEPC WMI: Unable to register notify handler - %d\n",
			status);
		return -ENODEV;
	}

	return 0;
}

static void __exit eeepc_wmi_exit(void)
{
	wmi_remove_notify_handler(EEEPC_WMI_EVENT_GUID);
	sparse_keymap_free(eeepc_wmi_input_dev);
	input_unregister_device(eeepc_wmi_input_dev);
}

module_init(eeepc_wmi_init);
module_exit(eeepc_wmi_exit);
Commit	Line	Data
ee027e4a YW	1	/*
	2	* Eee PC WMI hotkey driver
	3	*
	4	* Copyright(C) 2010 Intel Corporation.
	5	*
	6	* Portions based on wistron_btns.c:
	7	* Copyright (C) 2005 Miloslav Trmac <mitr@volny.cz>
	8	* Copyright (C) 2005 Bernhard Rosenkraenzer <bero@arklinux.org>
	9	* Copyright (C) 2005 Dmitry Torokhov <dtor@mail.ru>
	10	*
	11	* This program is free software; you can redistribute it and/or modify
	12	* it under the terms of the GNU General Public License as published by
	13	* the Free Software Foundation; either version 2 of the License, or
	14	* (at your option) any later version.
	15	*
	16	* This program is distributed in the hope that it will be useful,
	17	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	18	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	19	* GNU General Public License for more details.
	20	*
	21	* You should have received a copy of the GNU General Public License
	22	* along with this program; if not, write to the Free Software
	23	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	24	*/
	25
	26	#include <linux/kernel.h>
	27	#include <linux/module.h>
	28	#include <linux/init.h>
	29	#include <linux/types.h>
	30	#include <linux/input.h>
	31	#include <linux/input/sparse-keymap.h>
	32	#include <acpi/acpi_bus.h>
	33	#include <acpi/acpi_drivers.h>
	34
	35	MODULE_AUTHOR("Yong Wang <yong.y.wang@intel.com>");
	36	MODULE_DESCRIPTION("Eee PC WMI Hotkey Driver");
	37	MODULE_LICENSE("GPL");
	38
	39	#define EEEPC_WMI_EVENT_GUID "ABBC0F72-8EA1-11D1-00A0-C90629100000"
	40
	41	MODULE_ALIAS("wmi:"EEEPC_WMI_EVENT_GUID);
	42
	43	#define NOTIFY_BRNUP_MIN 0x11
	44	#define NOTIFY_BRNUP_MAX 0x1f
	45	#define NOTIFY_BRNDOWN_MIN 0x20
	46	#define NOTIFY_BRNDOWN_MAX 0x2e
	47
	48	static const struct key_entry eeepc_wmi_keymap[] = {
	49	/* Sleep already handled via generic ACPI code */
	50	{ KE_KEY, 0x5d, { KEY_WLAN } },
	51	{ KE_KEY, 0x32, { KEY_MUTE } },
	52	{ KE_KEY, 0x31, { KEY_VOLUMEDOWN } },
	53	{ KE_KEY, 0x30, { KEY_VOLUMEUP } },
	54	{ KE_IGNORE, NOTIFY_BRNDOWN_MIN, { KEY_BRIGHTNESSDOWN } },
	55	{ KE_IGNORE, NOTIFY_BRNUP_MIN, { KEY_BRIGHTNESSUP } },
	56	{ KE_KEY, 0xcc, { KEY_SWITCHVIDEOMODE } },
	57	{ KE_END, 0},
	58	};
	59
	60	static struct input_dev *eeepc_wmi_input_dev;
	61
	62	static void eeepc_wmi_notify(u32 value, void *context)
	63	{
	64	struct acpi_buffer response = { ACPI_ALLOCATE_BUFFER, NULL };
65	union acpi_object *obj;
66	acpi_status status;
67	int code;
68
69	status = wmi_get_event_data(value, &response);
70	if (status != AE_OK) {
71	pr_err("EEEPC WMI: bad event status 0x%x\n", status);
72	return;
73	}
74
75	obj = (union acpi_object *)response.pointer;
76
77	if (obj && obj->type == ACPI_TYPE_INTEGER) {
78	code = obj->integer.value;
79
80	if (code >= NOTIFY_BRNUP_MIN && code <= NOTIFY_BRNUP_MAX)
81	code = NOTIFY_BRNUP_MIN;
82	else if (code >= NOTIFY_BRNDOWN_MIN && code <= NOTIFY_BRNDOWN_MAX)
83	code = NOTIFY_BRNDOWN_MIN;
84
85	if (!sparse_keymap_report_event(eeepc_wmi_input_dev,
86	code, 1, true))
87	pr_info("EEEPC WMI: Unknown key %x pressed\n", code);
88	}
89
90	kfree(obj);
91	}
92
93	static int eeepc_wmi_input_setup(void)
94	{
95	int err;
96
97	eeepc_wmi_input_dev = input_allocate_device();
98	if (!eeepc_wmi_input_dev)
99	return -ENOMEM;
100
101	eeepc_wmi_input_dev->name = "Eee PC WMI hotkeys";
102	eeepc_wmi_input_dev->phys = "wmi/input0";
103	eeepc_wmi_input_dev->id.bustype = BUS_HOST;
104
105	err = sparse_keymap_setup(eeepc_wmi_input_dev, eeepc_wmi_keymap, NULL);
106	if (err)
107	goto err_free_dev;
108
109	err = input_register_device(eeepc_wmi_input_dev);
110	if (err)
111	goto err_free_keymap;
112
113	return 0;
114
115	err_free_keymap:
116	sparse_keymap_free(eeepc_wmi_input_dev);
117	err_free_dev:
118	input_free_device(eeepc_wmi_input_dev);
119	return err;
120	}
121
122	static int __init eeepc_wmi_init(void)
123	{
124	int err;
125	acpi_status status;
126
127	if (!wmi_has_guid(EEEPC_WMI_EVENT_GUID)) {
128	pr_warning("EEEPC WMI: No known WMI GUID found\n");
129	return -ENODEV;
130	}
131
132	err = eeepc_wmi_input_setup();
133	if (err)
134	return err;
135
136	status = wmi_install_notify_handler(EEEPC_WMI_EVENT_GUID,
137	eeepc_wmi_notify, NULL);
138	if (ACPI_FAILURE(status)) {
139	sparse_keymap_free(eeepc_wmi_input_dev);
140	input_unregister_device(eeepc_wmi_input_dev);
141	pr_err("EEEPC WMI: Unable to register notify handler - %d\n",
142	status);
143	return -ENODEV;
144	}
145
146	return 0;
147	}
148
149	static void __exit eeepc_wmi_exit(void)
150	{
151	wmi_remove_notify_handler(EEEPC_WMI_EVENT_GUID);
152	sparse_keymap_free(eeepc_wmi_input_dev);
153	input_unregister_device(eeepc_wmi_input_dev);
154	}
155
156	module_init(eeepc_wmi_init);
157	module_exit(eeepc_wmi_exit);