[net-next-2.6.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>
#include <linux/slab.h>

MODULE_LICENSE("GPL");

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;
}
module_init(mac_hid_init);

static void __exit mac_hid_exit(void)
{
	unregister_sysctl_table(mac_hid_sysctl_header);

	if (mouse_emulate_buttons)
		mac_hid_stop_emulation();
}
module_exit(mac_hid_exit);
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>
5a0e3ad6	16	#include <linux/slab.h>
1da177e4	17
429722e1 DT	18	MODULE_LICENSE("GPL");
429722e1 DT	19
87275856	20	static int mouse_emulate_buttons;
1da177e4 LT	21	static int mouse_button2_keycode = KEY_RIGHTCTRL; /* right control key */
1da177e4 LT	22	static int mouse_button3_keycode = KEY_RIGHTALT; /* right option key */
1da177e4	23
99b089c3 DT	24	static struct input_dev *mac_hid_emumouse_dev;
	25
	26	static int mac_hid_create_emumouse(void)
	27	{
	28	static struct lock_class_key mac_hid_emumouse_dev_event_class;
	29	static struct lock_class_key mac_hid_emumouse_dev_mutex_class;
	30	int err;
	31
	32	mac_hid_emumouse_dev = input_allocate_device();
	33	if (!mac_hid_emumouse_dev)
	34	return -ENOMEM;
	35
	36	lockdep_set_class(&mac_hid_emumouse_dev->event_lock,
	37	&mac_hid_emumouse_dev_event_class);
	38	lockdep_set_class(&mac_hid_emumouse_dev->mutex,
	39	&mac_hid_emumouse_dev_mutex_class);
	40
	41	mac_hid_emumouse_dev->name = "Macintosh mouse button emulation";
	42	mac_hid_emumouse_dev->id.bustype = BUS_ADB;
	43	mac_hid_emumouse_dev->id.vendor = 0x0001;
	44	mac_hid_emumouse_dev->id.product = 0x0001;
	45	mac_hid_emumouse_dev->id.version = 0x0100;
	46
	47	mac_hid_emumouse_dev->evbit[0] = BIT_MASK(EV_KEY) \| BIT_MASK(EV_REL);
	48	mac_hid_emumouse_dev->keybit[BIT_WORD(BTN_MOUSE)] =
	49	BIT_MASK(BTN_LEFT) \| BIT_MASK(BTN_MIDDLE) \| BIT_MASK(BTN_RIGHT);
	50	mac_hid_emumouse_dev->relbit[0] = BIT_MASK(REL_X) \| BIT_MASK(REL_Y);
	51
	52	err = input_register_device(mac_hid_emumouse_dev);
	53	if (err) {
	54	input_free_device(mac_hid_emumouse_dev);
	55	mac_hid_emumouse_dev = NULL;
	56	return err;
	57	}
	58
	59	return 0;
	60	}
	61
	62	static void mac_hid_destroy_emumouse(void)
	63	{
	64	input_unregister_device(mac_hid_emumouse_dev);
	65	mac_hid_emumouse_dev = NULL;
	66	}
	67
	68	static bool mac_hid_emumouse_filter(struct input_handle *handle,
	69	unsigned int type, unsigned int code,
	70	int value)
	71	{
	72	unsigned int btn;
	73
	74	if (type != EV_KEY)
	75	return false;
	76
	77	if (code == mouse_button2_keycode)
	78	btn = BTN_MIDDLE;
	79	else if (code == mouse_button3_keycode)
	80	btn = BTN_RIGHT;
	81	else
	82	return false;
	83
	84	input_report_key(mac_hid_emumouse_dev, btn, value);
	85	input_sync(mac_hid_emumouse_dev);
	86
	87	return true;
88	}
89
90	static int mac_hid_emumouse_connect(struct input_handler *handler,
91	struct input_dev *dev,
92	const struct input_device_id *id)
93	{
94	struct input_handle *handle;
95	int error;
96
97	/* Don't bind to ourselves */
98	if (dev == mac_hid_emumouse_dev)
99	return -ENODEV;
100
101	handle = kzalloc(sizeof(struct input_handle), GFP_KERNEL);
102	if (!handle)
103	return -ENOMEM;
104
105	handle->dev = dev;
106	handle->handler = handler;
107	handle->name = "mac-button-emul";
108
109	error = input_register_handle(handle);
110	if (error) {
111	printk(KERN_ERR
112	"mac_hid: Failed to register button emulation handle, "
113	"error %d\n", error);
114	goto err_free;
115	}
116
117	error = input_open_device(handle);
118	if (error) {
119	printk(KERN_ERR
120	"mac_hid: Failed to open input device, error %d\n",
121	error);
122	goto err_unregister;
123	}
124
125	return 0;
126
127	err_unregister:
128	input_unregister_handle(handle);
129	err_free:
130	kfree(handle);
131	return error;
132	}
133
134	static void mac_hid_emumouse_disconnect(struct input_handle *handle)
135	{
136	input_close_device(handle);
137	input_unregister_handle(handle);
138	kfree(handle);
139	}
140
141	static const struct input_device_id mac_hid_emumouse_ids[] = {
142	{
143	.flags = INPUT_DEVICE_ID_MATCH_EVBIT,
144	.evbit = { BIT_MASK(EV_KEY) },
145	},
146	{ },
147	};
148
149	MODULE_DEVICE_TABLE(input, mac_hid_emumouse_ids);
150
151	static struct input_handler mac_hid_emumouse_handler = {
152	.filter = mac_hid_emumouse_filter,
153	.connect = mac_hid_emumouse_connect,
154	.disconnect = mac_hid_emumouse_disconnect,
155	.name = "mac-button-emul",
156	.id_table = mac_hid_emumouse_ids,
157	};
158
159	static int mac_hid_start_emulation(void)
160	{
161	int err;
162
163	err = mac_hid_create_emumouse();
164	if (err)
165	return err;
166
167	err = input_register_handler(&mac_hid_emumouse_handler);
168	if (err) {
169	mac_hid_destroy_emumouse();
170	return err;
171	}
172
173	return 0;
174	}
175
176	static void mac_hid_stop_emulation(void)
177	{
178	input_unregister_handler(&mac_hid_emumouse_handler);
179	mac_hid_destroy_emumouse();
180	}
181
182	static int mac_hid_toggle_emumouse(ctl_table *table, int write,
183	void __user buffer, size_t lenp,
184	loff_t *ppos)
185	{
186	int *valp = table->data;
187	int old_val = *valp;
188	int rc;
189
190	rc = proc_dointvec(table, write, buffer, lenp, ppos);
191
192	if (rc == 0 && write && *valp != old_val) {
193	if (*valp == 1)
194	rc = mac_hid_start_emulation();
195	else if (*valp == 0)
196	mac_hid_stop_emulation();
197	else
198	rc = -EINVAL;
199	}
200
201	/* Restore the old value in case of error */
202	if (rc)
203	*valp = old_val;
204
205	return rc;
206	}
207
1da177e4	208	/* file(s) in /proc/sys/dev/mac_hid */
f3e5d2bf	209	static ctl_table mac_hid_files[] = {
1da177e4	210	{
1da177e4 LT	211	.procname = "mouse_button_emulation",
	212	.data = &mouse_emulate_buttons,
	213	.maxlen = sizeof(int),
	214	.mode = 0644,
99b089c3	215	.proc_handler = mac_hid_toggle_emumouse,
1da177e4 LT	216	},
1da177e4 LT	217	{
1da177e4 LT	218	.procname = "mouse_button2_keycode",
	219	.data = &mouse_button2_keycode,
	220	.maxlen = sizeof(int),
	221	.mode = 0644,
6d456111	222	.proc_handler = proc_dointvec,
1da177e4 LT	223	},
1da177e4 LT	224	{
1da177e4 LT	225	.procname = "mouse_button3_keycode",
	226	.data = &mouse_button3_keycode,
	227	.maxlen = sizeof(int),
	228	.mode = 0644,
6d456111	229	.proc_handler = proc_dointvec,
1da177e4	230	},
894d2491	231	{ }
1da177e4 LT	232	};
	233
	234	/* dir in /proc/sys/dev */
f3e5d2bf	235	static ctl_table mac_hid_dir[] = {
1da177e4	236	{
1da177e4 LT	237	.procname = "mac_hid",
	238	.maxlen = 0,
	239	.mode = 0555,
	240	.child = mac_hid_files,
	241	},
894d2491	242	{ }
1da177e4 LT	243	};
	244
	245	/* /proc/sys/dev itself, in case that is not there yet */
f3e5d2bf	246	static ctl_table mac_hid_root_dir[] = {
1da177e4	247	{
1da177e4 LT	248	.procname = "dev",
	249	.maxlen = 0,
	250	.mode = 0555,
	251	.child = mac_hid_dir,
	252	},
894d2491	253	{ }
1da177e4 LT	254	};
	255
	256	static struct ctl_table_header *mac_hid_sysctl_header;
	257
f3e5d2bf	258	static int __init mac_hid_init(void)
1da177e4	259	{
0b4d4147	260	mac_hid_sysctl_header = register_sysctl_table(mac_hid_root_dir);
99b089c3 DT	261	if (!mac_hid_sysctl_header)
99b089c3 DT	262	return -ENOMEM;
1da177e4 LT	263
	264	return 0;
	265	}
429722e1	266	module_init(mac_hid_init);
1da177e4	267
429722e1 DT	268	static void __exit mac_hid_exit(void)
	269	{
	270	unregister_sysctl_table(mac_hid_sysctl_header);
	271
	272	if (mouse_emulate_buttons)
	273	mac_hid_stop_emulation();
	274	}
	275	module_exit(mac_hid_exit);