[mirror_ubuntu-artful-kernel.git] / drivers / macintosh / mac_hid.c

/*
 * drivers/macintosh/mac_hid.c
 *
 * HID support stuff for Macintosh computers.
 *
 * Copyright (C) 2000 Franz Sirl.
 *
 * This file will soon be removed in favor of an uinput userspace tool.
 */

#include <linux/init.h>
#include <linux/proc_fs.h>
#include <linux/sysctl.h>
#include <linux/input.h>
#include <linux/module.h>

static int mouse_emulate_buttons;
static int mouse_button2_keycode = KEY_RIGHTCTRL;	/* right control key */
static int mouse_button3_keycode = KEY_RIGHTALT;	/* right option key */

static struct input_dev *mac_hid_emumouse_dev;

static int mac_hid_create_emumouse(void)
{
	static struct lock_class_key mac_hid_emumouse_dev_event_class;
	static struct lock_class_key mac_hid_emumouse_dev_mutex_class;
	int err;

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

	lockdep_set_class(&mac_hid_emumouse_dev->event_lock,
			  &mac_hid_emumouse_dev_event_class);
	lockdep_set_class(&mac_hid_emumouse_dev->mutex,
			  &mac_hid_emumouse_dev_mutex_class);

	mac_hid_emumouse_dev->name = "Macintosh mouse button emulation";
	mac_hid_emumouse_dev->id.bustype = BUS_ADB;
	mac_hid_emumouse_dev->id.vendor = 0x0001;
	mac_hid_emumouse_dev->id.product = 0x0001;
	mac_hid_emumouse_dev->id.version = 0x0100;

	mac_hid_emumouse_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REL);
	mac_hid_emumouse_dev->keybit[BIT_WORD(BTN_MOUSE)] =
		BIT_MASK(BTN_LEFT) | BIT_MASK(BTN_MIDDLE) | BIT_MASK(BTN_RIGHT);
	mac_hid_emumouse_dev->relbit[0] = BIT_MASK(REL_X) | BIT_MASK(REL_Y);

	err = input_register_device(mac_hid_emumouse_dev);
	if (err) {
		input_free_device(mac_hid_emumouse_dev);
		mac_hid_emumouse_dev = NULL;
		return err;
	}

	return 0;
}

static void mac_hid_destroy_emumouse(void)
{
	input_unregister_device(mac_hid_emumouse_dev);
	mac_hid_emumouse_dev = NULL;
}

static bool mac_hid_emumouse_filter(struct input_handle *handle,
				    unsigned int type, unsigned int code,
				    int value)
{
	unsigned int btn;

	if (type != EV_KEY)
		return false;

	if (code == mouse_button2_keycode)
		btn = BTN_MIDDLE;
	else if (code == mouse_button3_keycode)
		btn = BTN_RIGHT;
	else
		return false;

	input_report_key(mac_hid_emumouse_dev, btn, value);
	input_sync(mac_hid_emumouse_dev);

	return true;
}

static int mac_hid_emumouse_connect(struct input_handler *handler,
				    struct input_dev *dev,
				    const struct input_device_id *id)
{
	struct input_handle *handle;
	int error;

	/* Don't bind to ourselves */
	if (dev == mac_hid_emumouse_dev)
		return -ENODEV;

	handle = kzalloc(sizeof(struct input_handle), GFP_KERNEL);
	if (!handle)
		return -ENOMEM;

	handle->dev = dev;
	handle->handler = handler;
	handle->name = "mac-button-emul";

	error = input_register_handle(handle);
	if (error) {
		printk(KERN_ERR
			"mac_hid: Failed to register button emulation handle, "
			"error %d\n", error);
		goto err_free;
	}

	error = input_open_device(handle);
	if (error) {
		printk(KERN_ERR
			"mac_hid: Failed to open input device, error %d\n",
			error);
		goto err_unregister;
	}

	return 0;

 err_unregister:
	input_unregister_handle(handle);
 err_free:
	kfree(handle);
	return error;
}

static void mac_hid_emumouse_disconnect(struct input_handle *handle)
{
	input_close_device(handle);
	input_unregister_handle(handle);
	kfree(handle);
}

static const struct input_device_id mac_hid_emumouse_ids[] = {
	{
		.flags = INPUT_DEVICE_ID_MATCH_EVBIT,
		.evbit = { BIT_MASK(EV_KEY) },
	},
	{ },
};

MODULE_DEVICE_TABLE(input, mac_hid_emumouse_ids);

static struct input_handler mac_hid_emumouse_handler = {
	.filter		= mac_hid_emumouse_filter,
	.connect	= mac_hid_emumouse_connect,
	.disconnect	= mac_hid_emumouse_disconnect,
	.name		= "mac-button-emul",
	.id_table	= mac_hid_emumouse_ids,
};

static int mac_hid_start_emulation(void)
{
	int err;

	err = mac_hid_create_emumouse();
	if (err)
		return err;

	err = input_register_handler(&mac_hid_emumouse_handler);
	if (err) {
		mac_hid_destroy_emumouse();
		return err;
	}

	return 0;
}

static void mac_hid_stop_emulation(void)
{
	input_unregister_handler(&mac_hid_emumouse_handler);
	mac_hid_destroy_emumouse();
}

static int mac_hid_toggle_emumouse(ctl_table *table, int write,
				   void __user *buffer, size_t *lenp,
				   loff_t *ppos)
{
	int *valp = table->data;
	int old_val = *valp;
	int rc;

	rc = proc_dointvec(table, write, buffer, lenp, ppos);

	if (rc == 0 && write && *valp != old_val) {
		if (*valp == 1)
			rc = mac_hid_start_emulation();
		else if (*valp == 0)
			mac_hid_stop_emulation();
		else
			rc = -EINVAL;
	}

	/* Restore the old value in case of error */
	if (rc)
		*valp = old_val;

	return rc;
}

/* file(s) in /proc/sys/dev/mac_hid */
static ctl_table mac_hid_files[] = {
	{
		.procname	= "mouse_button_emulation",
		.data		= &mouse_emulate_buttons,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= mac_hid_toggle_emumouse,
	},
	{
		.procname	= "mouse_button2_keycode",
		.data		= &mouse_button2_keycode,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= proc_dointvec,
	},
	{
		.procname	= "mouse_button3_keycode",
		.data		= &mouse_button3_keycode,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= proc_dointvec,
	},
	{ }
};

/* dir in /proc/sys/dev */
static ctl_table mac_hid_dir[] = {
	{
		.procname	= "mac_hid",
		.maxlen		= 0,
		.mode		= 0555,
		.child		= mac_hid_files,
	},
	{ }
};

/* /proc/sys/dev itself, in case that is not there yet */
static ctl_table mac_hid_root_dir[] = {
	{
		.procname	= "dev",
		.maxlen		= 0,
		.mode		= 0555,
		.child		= mac_hid_dir,
	},
	{ }
};

static struct ctl_table_header *mac_hid_sysctl_header;


static int __init mac_hid_init(void)
{
	mac_hid_sysctl_header = register_sysctl_table(mac_hid_root_dir);
	if (!mac_hid_sysctl_header)
		return -ENOMEM;

	return 0;
}

device_initcall(mac_hid_init);
Commit	Line	Data
1da177e4 LT	1	/*
	2	* drivers/macintosh/mac_hid.c
	3	*
	4	* HID support stuff for Macintosh computers.
	5	*
	6	* Copyright (C) 2000 Franz Sirl.
	7	*
	8	* This file will soon be removed in favor of an uinput userspace tool.
	9	*/
	10
1da177e4 LT	11	#include <linux/init.h>
	12	#include <linux/proc_fs.h>
	13	#include <linux/sysctl.h>
	14	#include <linux/input.h>
	15	#include <linux/module.h>
	16
87275856	17	static int mouse_emulate_buttons;
1da177e4 LT	18	static int mouse_button2_keycode = KEY_RIGHTCTRL; /* right control key */
1da177e4 LT	19	static int mouse_button3_keycode = KEY_RIGHTALT; /* right option key */
1da177e4	20
99b089c3 DT	21	static struct input_dev *mac_hid_emumouse_dev;
	22
	23	static int mac_hid_create_emumouse(void)
	24	{
	25	static struct lock_class_key mac_hid_emumouse_dev_event_class;
	26	static struct lock_class_key mac_hid_emumouse_dev_mutex_class;
	27	int err;
	28
	29	mac_hid_emumouse_dev = input_allocate_device();
	30	if (!mac_hid_emumouse_dev)
	31	return -ENOMEM;
	32
	33	lockdep_set_class(&mac_hid_emumouse_dev->event_lock,
	34	&mac_hid_emumouse_dev_event_class);
	35	lockdep_set_class(&mac_hid_emumouse_dev->mutex,
	36	&mac_hid_emumouse_dev_mutex_class);
	37
	38	mac_hid_emumouse_dev->name = "Macintosh mouse button emulation";
	39	mac_hid_emumouse_dev->id.bustype = BUS_ADB;
	40	mac_hid_emumouse_dev->id.vendor = 0x0001;
	41	mac_hid_emumouse_dev->id.product = 0x0001;
	42	mac_hid_emumouse_dev->id.version = 0x0100;
	43
	44	mac_hid_emumouse_dev->evbit[0] = BIT_MASK(EV_KEY) \| BIT_MASK(EV_REL);
	45	mac_hid_emumouse_dev->keybit[BIT_WORD(BTN_MOUSE)] =
	46	BIT_MASK(BTN_LEFT) \| BIT_MASK(BTN_MIDDLE) \| BIT_MASK(BTN_RIGHT);
	47	mac_hid_emumouse_dev->relbit[0] = BIT_MASK(REL_X) \| BIT_MASK(REL_Y);
	48
	49	err = input_register_device(mac_hid_emumouse_dev);
	50	if (err) {
	51	input_free_device(mac_hid_emumouse_dev);
	52	mac_hid_emumouse_dev = NULL;
	53	return err;
	54	}
	55
	56	return 0;
	57	}
	58
	59	static void mac_hid_destroy_emumouse(void)
	60	{
	61	input_unregister_device(mac_hid_emumouse_dev);
	62	mac_hid_emumouse_dev = NULL;
	63	}
	64
	65	static bool mac_hid_emumouse_filter(struct input_handle *handle,
	66	unsigned int type, unsigned int code,
	67	int value)
	68	{
	69	unsigned int btn;
	70
	71	if (type != EV_KEY)
	72	return false;
	73
	74	if (code == mouse_button2_keycode)
	75	btn = BTN_MIDDLE;
	76	else if (code == mouse_button3_keycode)
	77	btn = BTN_RIGHT;
	78	else
	79	return false;
	80
	81	input_report_key(mac_hid_emumouse_dev, btn, value);
	82	input_sync(mac_hid_emumouse_dev);
	83
	84	return true;
85	}
86
87	static int mac_hid_emumouse_connect(struct input_handler *handler,
88	struct input_dev *dev,
89	const struct input_device_id *id)
90	{
91	struct input_handle *handle;
92	int error;
93
94	/* Don't bind to ourselves */
95	if (dev == mac_hid_emumouse_dev)
96	return -ENODEV;
97
98	handle = kzalloc(sizeof(struct input_handle), GFP_KERNEL);
99	if (!handle)
100	return -ENOMEM;
101
102	handle->dev = dev;
103	handle->handler = handler;
104	handle->name = "mac-button-emul";
105
106	error = input_register_handle(handle);
107	if (error) {
108	printk(KERN_ERR
109	"mac_hid: Failed to register button emulation handle, "
110	"error %d\n", error);
111	goto err_free;
112	}
113
114	error = input_open_device(handle);
115	if (error) {
116	printk(KERN_ERR
117	"mac_hid: Failed to open input device, error %d\n",
118	error);
119	goto err_unregister;
120	}
121
122	return 0;
123
124	err_unregister:
125	input_unregister_handle(handle);
126	err_free:
127	kfree(handle);
128	return error;
129	}
130
131	static void mac_hid_emumouse_disconnect(struct input_handle *handle)
132	{
133	input_close_device(handle);
134	input_unregister_handle(handle);
135	kfree(handle);
136	}
137
138	static const struct input_device_id mac_hid_emumouse_ids[] = {
139	{
140	.flags = INPUT_DEVICE_ID_MATCH_EVBIT,
141	.evbit = { BIT_MASK(EV_KEY) },
142	},
143	{ },
144	};
145
146	MODULE_DEVICE_TABLE(input, mac_hid_emumouse_ids);
147
148	static struct input_handler mac_hid_emumouse_handler = {
149	.filter = mac_hid_emumouse_filter,
150	.connect = mac_hid_emumouse_connect,
151	.disconnect = mac_hid_emumouse_disconnect,
152	.name = "mac-button-emul",
153	.id_table = mac_hid_emumouse_ids,
154	};
155
156	static int mac_hid_start_emulation(void)
157	{
158	int err;
159
160	err = mac_hid_create_emumouse();
161	if (err)
162	return err;
163
164	err = input_register_handler(&mac_hid_emumouse_handler);
165	if (err) {
166	mac_hid_destroy_emumouse();
167	return err;
168	}
169
170	return 0;
171	}
172
173	static void mac_hid_stop_emulation(void)
174	{
175	input_unregister_handler(&mac_hid_emumouse_handler);
176	mac_hid_destroy_emumouse();
177	}
178
179	static int mac_hid_toggle_emumouse(ctl_table *table, int write,
180	void __user buffer, size_t lenp,
181	loff_t *ppos)
182	{
183	int *valp = table->data;
184	int old_val = *valp;
185	int rc;
186
187	rc = proc_dointvec(table, write, buffer, lenp, ppos);
188
189	if (rc == 0 && write && *valp != old_val) {
190	if (*valp == 1)
191	rc = mac_hid_start_emulation();
192	else if (*valp == 0)
193	mac_hid_stop_emulation();
194	else
195	rc = -EINVAL;
196	}
197
198	/* Restore the old value in case of error */
199	if (rc)
200	*valp = old_val;
201
202	return rc;
203	}
204
1da177e4	205	/* file(s) in /proc/sys/dev/mac_hid */
f3e5d2bf	206	static ctl_table mac_hid_files[] = {
1da177e4	207	{
1da177e4 LT	208	.procname = "mouse_button_emulation",
	209	.data = &mouse_emulate_buttons,
	210	.maxlen = sizeof(int),
	211	.mode = 0644,
99b089c3	212	.proc_handler = mac_hid_toggle_emumouse,
1da177e4 LT	213	},
1da177e4 LT	214	{
1da177e4 LT	215	.procname = "mouse_button2_keycode",
	216	.data = &mouse_button2_keycode,
	217	.maxlen = sizeof(int),
	218	.mode = 0644,
6d456111	219	.proc_handler = proc_dointvec,
1da177e4 LT	220	},
1da177e4 LT	221	{
1da177e4 LT	222	.procname = "mouse_button3_keycode",
	223	.data = &mouse_button3_keycode,
	224	.maxlen = sizeof(int),
	225	.mode = 0644,
6d456111	226	.proc_handler = proc_dointvec,
1da177e4	227	},
894d2491	228	{ }
1da177e4 LT	229	};
	230
	231	/* dir in /proc/sys/dev */
f3e5d2bf	232	static ctl_table mac_hid_dir[] = {
1da177e4	233	{
1da177e4 LT	234	.procname = "mac_hid",
	235	.maxlen = 0,
	236	.mode = 0555,
	237	.child = mac_hid_files,
	238	},
894d2491	239	{ }
1da177e4 LT	240	};
	241
	242	/* /proc/sys/dev itself, in case that is not there yet */
f3e5d2bf	243	static ctl_table mac_hid_root_dir[] = {
1da177e4	244	{
1da177e4 LT	245	.procname = "dev",
	246	.maxlen = 0,
	247	.mode = 0555,
	248	.child = mac_hid_dir,
	249	},
894d2491	250	{ }
1da177e4 LT	251	};
	252
	253	static struct ctl_table_header *mac_hid_sysctl_header;
	254
1da177e4	255
f3e5d2bf	256	static int __init mac_hid_init(void)
1da177e4	257	{
0b4d4147	258	mac_hid_sysctl_header = register_sysctl_table(mac_hid_root_dir);
99b089c3 DT	259	if (!mac_hid_sysctl_header)
99b089c3 DT	260	return -ENOMEM;
1da177e4 LT	261
	262	return 0;
	263	}
	264
	265	device_initcall(mac_hid_init);