[mirror_ubuntu-artful-kernel.git] / drivers / input / joydev.c

/*
 * Joystick device driver for the input driver suite.
 *
 * Copyright (c) 1999-2002 Vojtech Pavlik
 * Copyright (c) 1999 Colin Van Dyke
 *
 * 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.
 */

#include <asm/io.h>
#include <asm/system.h>
#include <linux/delay.h>
#include <linux/errno.h>
#include <linux/joystick.h>
#include <linux/input.h>
#include <linux/kernel.h>
#include <linux/major.h>
#include <linux/slab.h>
#include <linux/mm.h>
#include <linux/miscdevice.h>
#include <linux/module.h>
#include <linux/poll.h>
#include <linux/init.h>
#include <linux/device.h>

MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
MODULE_DESCRIPTION("Joystick device interfaces");
MODULE_SUPPORTED_DEVICE("input/js");
MODULE_LICENSE("GPL");

#define JOYDEV_MINOR_BASE	0
#define JOYDEV_MINORS		16
#define JOYDEV_BUFFER_SIZE	64

struct joydev {
	int exist;
	int open;
	int minor;
	char name[16];
	struct input_handle handle;
	wait_queue_head_t wait;
	struct list_head client_list;
	struct device dev;

	struct js_corr corr[ABS_MAX + 1];
	struct JS_DATA_SAVE_TYPE glue;
	int nabs;
	int nkey;
	__u16 keymap[KEY_MAX - BTN_MISC + 1];
	__u16 keypam[KEY_MAX - BTN_MISC + 1];
	__u8 absmap[ABS_MAX + 1];
	__u8 abspam[ABS_MAX + 1];
	__s16 abs[ABS_MAX + 1];
};

struct joydev_client {
	struct js_event buffer[JOYDEV_BUFFER_SIZE];
	int head;
	int tail;
	int startup;
	struct fasync_struct *fasync;
	struct joydev *joydev;
	struct list_head node;
};

static struct joydev *joydev_table[JOYDEV_MINORS];

static int joydev_correct(int value, struct js_corr *corr)
{
	switch (corr->type) {
		case JS_CORR_NONE:
			break;
		case JS_CORR_BROKEN:
			value = value > corr->coef[0] ? (value < corr->coef[1] ? 0 :
				((corr->coef[3] * (value - corr->coef[1])) >> 14)) :
				((corr->coef[2] * (value - corr->coef[0])) >> 14);
			break;
		default:
			return 0;
	}

	return value < -32767 ? -32767 : (value > 32767 ? 32767 : value);
}

static void joydev_event(struct input_handle *handle, unsigned int type, unsigned int code, int value)
{
	struct joydev *joydev = handle->private;
	struct joydev_client *client;
	struct js_event event;

	switch (type) {

		case EV_KEY:
			if (code < BTN_MISC || value == 2)
				return;
			event.type = JS_EVENT_BUTTON;
			event.number = joydev->keymap[code - BTN_MISC];
			event.value = value;
			break;

		case EV_ABS:
			event.type = JS_EVENT_AXIS;
			event.number = joydev->absmap[code];
			event.value = joydev_correct(value, joydev->corr + event.number);
			if (event.value == joydev->abs[event.number])
				return;
			joydev->abs[event.number] = event.value;
			break;

		default:
			return;
	}

	event.time = jiffies_to_msecs(jiffies);

	list_for_each_entry(client, &joydev->client_list, node) {

		memcpy(client->buffer + client->head, &event, sizeof(struct js_event));

		if (client->startup == joydev->nabs + joydev->nkey)
			if (client->tail == (client->head = (client->head + 1) & (JOYDEV_BUFFER_SIZE - 1)))
				client->startup = 0;

		kill_fasync(&client->fasync, SIGIO, POLL_IN);
	}

	wake_up_interruptible(&joydev->wait);
}

static int joydev_fasync(int fd, struct file *file, int on)
{
	int retval;
	struct joydev_client *client = file->private_data;

	retval = fasync_helper(fd, file, on, &client->fasync);

	return retval < 0 ? retval : 0;
}

static void joydev_free(struct device *dev)
{
	struct joydev *joydev = container_of(dev, struct joydev, dev);

	joydev_table[joydev->minor] = NULL;
	kfree(joydev);
}

static int joydev_release(struct inode *inode, struct file *file)
{
	struct joydev_client *client = file->private_data;
	struct joydev *joydev = client->joydev;

	joydev_fasync(-1, file, 0);

	list_del(&client->node);
	kfree(client);

	if (!--joydev->open && joydev->exist)
		input_close_device(&joydev->handle);

	put_device(&joydev->dev);

	return 0;
}

static int joydev_open(struct inode *inode, struct file *file)
{
	struct joydev_client *client;
	struct joydev *joydev;
	int i = iminor(inode) - JOYDEV_MINOR_BASE;
	int error;

	if (i >= JOYDEV_MINORS)
		return -ENODEV;

	joydev = joydev_table[i];
	if (!joydev || !joydev->exist)
		return -ENODEV;

	get_device(&joydev->dev);

	client = kzalloc(sizeof(struct joydev_client), GFP_KERNEL);
	if (!client) {
		error = -ENOMEM;
		goto err_put_joydev;
	}

	client->joydev = joydev;
	list_add_tail(&client->node, &joydev->client_list);

	if (!joydev->open++ && joydev->exist) {
		error = input_open_device(&joydev->handle);
		if (error)
			goto err_free_client;
	}

	file->private_data = client;
	return 0;

 err_free_client:
	list_del(&client->node);
	kfree(client);
 err_put_joydev:
	put_device(&joydev->dev);
	return error;
}

static ssize_t joydev_write(struct file *file, const char __user *buffer, size_t count, loff_t *ppos)
{
	return -EINVAL;
}

static ssize_t joydev_read(struct file *file, char __user *buf, size_t count, loff_t *ppos)
{
	struct joydev_client *client = file->private_data;
	struct joydev *joydev = client->joydev;
	struct input_dev *input = joydev->handle.dev;
	int retval = 0;

	if (!joydev->exist)
		return -ENODEV;

	if (count < sizeof(struct js_event))
		return -EINVAL;

	if (count == sizeof(struct JS_DATA_TYPE)) {

		struct JS_DATA_TYPE data;
		int i;

		for (data.buttons = i = 0; i < 32 && i < joydev->nkey; i++)
			data.buttons |= test_bit(joydev->keypam[i], input->key) ? (1 << i) : 0;
		data.x = (joydev->abs[0] / 256 + 128) >> joydev->glue.JS_CORR.x;
		data.y = (joydev->abs[1] / 256 + 128) >> joydev->glue.JS_CORR.y;

		if (copy_to_user(buf, &data, sizeof(struct JS_DATA_TYPE)))
			return -EFAULT;

		client->startup = 0;
		client->tail = client->head;

		return sizeof(struct JS_DATA_TYPE);
	}

	if (client->startup == joydev->nabs + joydev->nkey &&
	    client->head == client->tail && (file->f_flags & O_NONBLOCK))
		return -EAGAIN;

	retval = wait_event_interruptible(joydev->wait,
					  !joydev->exist ||
					  client->startup < joydev->nabs + joydev->nkey ||
					  client->head != client->tail);
	if (retval)
		return retval;

	if (!joydev->exist)
		return -ENODEV;

	while (client->startup < joydev->nabs + joydev->nkey && retval + sizeof(struct js_event) <= count) {

		struct js_event event;

		event.time = jiffies_to_msecs(jiffies);

		if (client->startup < joydev->nkey) {
			event.type = JS_EVENT_BUTTON | JS_EVENT_INIT;
			event.number = client->startup;
			event.value = !!test_bit(joydev->keypam[event.number], input->key);
		} else {
			event.type = JS_EVENT_AXIS | JS_EVENT_INIT;
			event.number = client->startup - joydev->nkey;
			event.value = joydev->abs[event.number];
		}

		if (copy_to_user(buf + retval, &event, sizeof(struct js_event)))
			return -EFAULT;

		client->startup++;
		retval += sizeof(struct js_event);
	}

	while (client->head != client->tail && retval + sizeof(struct js_event) <= count) {

		if (copy_to_user(buf + retval, client->buffer + client->tail, sizeof(struct js_event)))
			return -EFAULT;

		client->tail = (client->tail + 1) & (JOYDEV_BUFFER_SIZE - 1);
		retval += sizeof(struct js_event);
	}

	return retval;
}

/* No kernel lock - fine */
static unsigned int joydev_poll(struct file *file, poll_table *wait)
{
	struct joydev_client *client = file->private_data;
	struct joydev *joydev = client->joydev;

	poll_wait(file, &joydev->wait, wait);
	return ((client->head != client->tail || client->startup < joydev->nabs + joydev->nkey) ?
		(POLLIN | POLLRDNORM) : 0) | (joydev->exist ? 0 : (POLLHUP | POLLERR));
}

static int joydev_ioctl_common(struct joydev *joydev, unsigned int cmd, void __user *argp)
{
	struct input_dev *dev = joydev->handle.dev;
	int i, j;

	switch (cmd) {

		case JS_SET_CAL:
			return copy_from_user(&joydev->glue.JS_CORR, argp,
				sizeof(joydev->glue.JS_CORR)) ? -EFAULT : 0;

		case JS_GET_CAL:
			return copy_to_user(argp, &joydev->glue.JS_CORR,
				sizeof(joydev->glue.JS_CORR)) ? -EFAULT : 0;

		case JS_SET_TIMEOUT:
			return get_user(joydev->glue.JS_TIMEOUT, (s32 __user *) argp);

		case JS_GET_TIMEOUT:
			return put_user(joydev->glue.JS_TIMEOUT, (s32 __user *) argp);

		case JSIOCGVERSION:
			return put_user(JS_VERSION, (__u32 __user *) argp);

		case JSIOCGAXES:
			return put_user(joydev->nabs, (__u8 __user *) argp);

		case JSIOCGBUTTONS:
			return put_user(joydev->nkey, (__u8 __user *) argp);

		case JSIOCSCORR:
			if (copy_from_user(joydev->corr, argp,
				      sizeof(joydev->corr[0]) * joydev->nabs))
			    return -EFAULT;
			for (i = 0; i < joydev->nabs; i++) {
				j = joydev->abspam[i];
			        joydev->abs[i] = joydev_correct(dev->abs[j], joydev->corr + i);
			}
			return 0;

		case JSIOCGCORR:
			return copy_to_user(argp, joydev->corr,
						sizeof(joydev->corr[0]) * joydev->nabs) ? -EFAULT : 0;

		case JSIOCSAXMAP:
			if (copy_from_user(joydev->abspam, argp, sizeof(__u8) * (ABS_MAX + 1)))
				return -EFAULT;
			for (i = 0; i < joydev->nabs; i++) {
				if (joydev->abspam[i] > ABS_MAX)
					return -EINVAL;
				joydev->absmap[joydev->abspam[i]] = i;
			}
			return 0;

		case JSIOCGAXMAP:
			return copy_to_user(argp, joydev->abspam,
						sizeof(__u8) * (ABS_MAX + 1)) ? -EFAULT : 0;

		case JSIOCSBTNMAP:
			if (copy_from_user(joydev->keypam, argp, sizeof(__u16) * (KEY_MAX - BTN_MISC + 1)))
				return -EFAULT;
			for (i = 0; i < joydev->nkey; i++) {
				if (joydev->keypam[i] > KEY_MAX || joydev->keypam[i] < BTN_MISC)
					return -EINVAL;
				joydev->keymap[joydev->keypam[i] - BTN_MISC] = i;
			}
			return 0;

		case JSIOCGBTNMAP:
			return copy_to_user(argp, joydev->keypam,
						sizeof(__u16) * (KEY_MAX - BTN_MISC + 1)) ? -EFAULT : 0;

		default:
			if ((cmd & ~(_IOC_SIZEMASK << _IOC_SIZESHIFT)) == JSIOCGNAME(0)) {
				int len;
				if (!dev->name)
					return 0;
				len = strlen(dev->name) + 1;
				if (len > _IOC_SIZE(cmd))
					len = _IOC_SIZE(cmd);
				if (copy_to_user(argp, dev->name, len))
					return -EFAULT;
				return len;
			}
	}
	return -EINVAL;
}

#ifdef CONFIG_COMPAT
static long joydev_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
{
	struct joydev_client *client = file->private_data;
	struct joydev *joydev = client->joydev;
	void __user *argp = (void __user *)arg;
	s32 tmp32;
	struct JS_DATA_SAVE_TYPE_32 ds32;
	int err;

	if (!joydev->exist)
		return -ENODEV;

	switch(cmd) {
	case JS_SET_TIMELIMIT:
		err = get_user(tmp32, (s32 __user *) arg);
		if (err == 0)
			joydev->glue.JS_TIMELIMIT = tmp32;
		break;
	case JS_GET_TIMELIMIT:
		tmp32 = joydev->glue.JS_TIMELIMIT;
		err = put_user(tmp32, (s32 __user *) arg);
		break;

	case JS_SET_ALL:
		err = copy_from_user(&ds32, argp,
				     sizeof(ds32)) ? -EFAULT : 0;
		if (err == 0) {
			joydev->glue.JS_TIMEOUT    = ds32.JS_TIMEOUT;
			joydev->glue.BUSY          = ds32.BUSY;
			joydev->glue.JS_EXPIRETIME = ds32.JS_EXPIRETIME;
			joydev->glue.JS_TIMELIMIT  = ds32.JS_TIMELIMIT;
			joydev->glue.JS_SAVE       = ds32.JS_SAVE;
			joydev->glue.JS_CORR       = ds32.JS_CORR;
		}
		break;

	case JS_GET_ALL:
		ds32.JS_TIMEOUT    = joydev->glue.JS_TIMEOUT;
		ds32.BUSY          = joydev->glue.BUSY;
		ds32.JS_EXPIRETIME = joydev->glue.JS_EXPIRETIME;
		ds32.JS_TIMELIMIT  = joydev->glue.JS_TIMELIMIT;
		ds32.JS_SAVE       = joydev->glue.JS_SAVE;
		ds32.JS_CORR       = joydev->glue.JS_CORR;

		err = copy_to_user(argp, &ds32, sizeof(ds32)) ? -EFAULT : 0;
		break;

	default:
		err = joydev_ioctl_common(joydev, cmd, argp);
	}
	return err;
}
#endif /* CONFIG_COMPAT */

static int joydev_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
{
	struct joydev_client *client = file->private_data;
	struct joydev *joydev = client->joydev;
	void __user *argp = (void __user *)arg;

	if (!joydev->exist)
		return -ENODEV;

	switch(cmd) {
		case JS_SET_TIMELIMIT:
			return get_user(joydev->glue.JS_TIMELIMIT, (long __user *) arg);
		case JS_GET_TIMELIMIT:
			return put_user(joydev->glue.JS_TIMELIMIT, (long __user *) arg);
		case JS_SET_ALL:
			return copy_from_user(&joydev->glue, argp,
						sizeof(joydev->glue)) ? -EFAULT : 0;
		case JS_GET_ALL:
			return copy_to_user(argp, &joydev->glue,
						sizeof(joydev->glue)) ? -EFAULT : 0;
		default:
			return joydev_ioctl_common(joydev, cmd, argp);
	}
}

static const struct file_operations joydev_fops = {
	.owner =	THIS_MODULE,
	.read =		joydev_read,
	.write =	joydev_write,
	.poll =		joydev_poll,
	.open =		joydev_open,
	.release =	joydev_release,
	.ioctl =	joydev_ioctl,
#ifdef CONFIG_COMPAT
	.compat_ioctl =	joydev_compat_ioctl,
#endif
	.fasync =	joydev_fasync,
};

static int joydev_connect(struct input_handler *handler, struct input_dev *dev,
			  const struct input_device_id *id)
{
	struct joydev *joydev;
	int i, j, t, minor;
	int error;

	for (minor = 0; minor < JOYDEV_MINORS && joydev_table[minor]; minor++);
	if (minor == JOYDEV_MINORS) {
		printk(KERN_ERR "joydev: no more free joydev devices\n");
		return -ENFILE;
	}

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

	INIT_LIST_HEAD(&joydev->client_list);
	init_waitqueue_head(&joydev->wait);

	joydev->minor = minor;
	joydev->exist = 1;
	joydev->handle.dev = dev;
	joydev->handle.name = joydev->name;
	joydev->handle.handler = handler;
	joydev->handle.private = joydev;
	snprintf(joydev->name, sizeof(joydev->name), "js%d", minor);

	for (i = 0; i < ABS_MAX + 1; i++)
		if (test_bit(i, dev->absbit)) {
			joydev->absmap[i] = joydev->nabs;
			joydev->abspam[joydev->nabs] = i;
			joydev->nabs++;
		}

	for (i = BTN_JOYSTICK - BTN_MISC; i < KEY_MAX - BTN_MISC + 1; i++)
		if (test_bit(i + BTN_MISC, dev->keybit)) {
			joydev->keymap[i] = joydev->nkey;
			joydev->keypam[joydev->nkey] = i + BTN_MISC;
			joydev->nkey++;
		}

	for (i = 0; i < BTN_JOYSTICK - BTN_MISC; i++)
		if (test_bit(i + BTN_MISC, dev->keybit)) {
			joydev->keymap[i] = joydev->nkey;
			joydev->keypam[joydev->nkey] = i + BTN_MISC;
			joydev->nkey++;
		}

	for (i = 0; i < joydev->nabs; i++) {
		j = joydev->abspam[i];
		if (dev->absmax[j] == dev->absmin[j]) {
			joydev->corr[i].type = JS_CORR_NONE;
			joydev->abs[i] = dev->abs[j];
			continue;
		}
		joydev->corr[i].type = JS_CORR_BROKEN;
		joydev->corr[i].prec = dev->absfuzz[j];
		joydev->corr[i].coef[0] = (dev->absmax[j] + dev->absmin[j]) / 2 - dev->absflat[j];
		joydev->corr[i].coef[1] = (dev->absmax[j] + dev->absmin[j]) / 2 + dev->absflat[j];
		if (!(t = ((dev->absmax[j] - dev->absmin[j]) / 2 - 2 * dev->absflat[j])))
			continue;
		joydev->corr[i].coef[2] = (1 << 29) / t;
		joydev->corr[i].coef[3] = (1 << 29) / t;

		joydev->abs[i] = joydev_correct(dev->abs[j], joydev->corr + i);
	}

	snprintf(joydev->dev.bus_id, sizeof(joydev->dev.bus_id),
		 "js%d", minor);
	joydev->dev.class = &input_class;
	joydev->dev.parent = &dev->dev;
	joydev->dev.devt = MKDEV(INPUT_MAJOR, JOYDEV_MINOR_BASE + minor);
	joydev->dev.release = joydev_free;
	device_initialize(&joydev->dev);

	joydev_table[minor] = joydev;

	error = device_add(&joydev->dev);
	if (error)
		goto err_free_joydev;

	error = input_register_handle(&joydev->handle);
	if (error)
		goto err_delete_joydev;

	return 0;

 err_delete_joydev:
	device_del(&joydev->dev);
 err_free_joydev:
	put_device(&joydev->dev);
	return error;
}


static void joydev_disconnect(struct input_handle *handle)
{
	struct joydev *joydev = handle->private;
	struct joydev_client *client;

	input_unregister_handle(handle);
	device_del(&joydev->dev);

	joydev->exist = 0;

	if (joydev->open) {
		input_close_device(handle);
		list_for_each_entry(client, &joydev->client_list, node)
			kill_fasync(&client->fasync, SIGIO, POLL_HUP);
		wake_up_interruptible(&joydev->wait);
	}

	put_device(&joydev->dev);
}

static const struct input_device_id joydev_blacklist[] = {
	{
		.flags = INPUT_DEVICE_ID_MATCH_EVBIT | INPUT_DEVICE_ID_MATCH_KEYBIT,
		.evbit = { BIT(EV_KEY) },
		.keybit = { [LONG(BTN_TOUCH)] = BIT(BTN_TOUCH) },
	},	/* Avoid itouchpads, touchscreens and tablets */
	{ }	/* Terminating entry */
};

static const struct input_device_id joydev_ids[] = {
	{
		.flags = INPUT_DEVICE_ID_MATCH_EVBIT | INPUT_DEVICE_ID_MATCH_ABSBIT,
		.evbit = { BIT(EV_ABS) },
		.absbit = { BIT(ABS_X) },
	},
	{
		.flags = INPUT_DEVICE_ID_MATCH_EVBIT | INPUT_DEVICE_ID_MATCH_ABSBIT,
		.evbit = { BIT(EV_ABS) },
		.absbit = { BIT(ABS_WHEEL) },
	},
	{
		.flags = INPUT_DEVICE_ID_MATCH_EVBIT | INPUT_DEVICE_ID_MATCH_ABSBIT,
		.evbit = { BIT(EV_ABS) },
		.absbit = { BIT(ABS_THROTTLE) },
	},
	{ }	/* Terminating entry */
};

MODULE_DEVICE_TABLE(input, joydev_ids);

static struct input_handler joydev_handler = {
	.event =	joydev_event,
	.connect =	joydev_connect,
	.disconnect =	joydev_disconnect,
	.fops =		&joydev_fops,
	.minor =	JOYDEV_MINOR_BASE,
	.name =		"joydev",
	.id_table =	joydev_ids,
	.blacklist =	joydev_blacklist,
};

static int __init joydev_init(void)
{
	return input_register_handler(&joydev_handler);
}

static void __exit joydev_exit(void)
{
	input_unregister_handler(&joydev_handler);
}

module_init(joydev_init);
module_exit(joydev_exit);
Commit	Line	Data
1da177e4 LT	1	/*
	2	* Joystick device driver for the input driver suite.
	3	*
	4	* Copyright (c) 1999-2002 Vojtech Pavlik
	5	* Copyright (c) 1999 Colin Van Dyke
	6	*
	7	* This program is free software; you can redistribute it and/or modify
	8	* it under the terms of the GNU General Public License as published by
	9	* the Free Software Foundation; either version 2 of the License, or
	10	* (at your option) any later version.
	11	*/
	12
	13	#include <asm/io.h>
	14	#include <asm/system.h>
	15	#include <linux/delay.h>
	16	#include <linux/errno.h>
	17	#include <linux/joystick.h>
	18	#include <linux/input.h>
	19	#include <linux/kernel.h>
	20	#include <linux/major.h>
	21	#include <linux/slab.h>
	22	#include <linux/mm.h>
	23	#include <linux/miscdevice.h>
	24	#include <linux/module.h>
	25	#include <linux/poll.h>
	26	#include <linux/init.h>
1da177e4	27	#include <linux/device.h>
1da177e4 LT	28
	29	MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
	30	MODULE_DESCRIPTION("Joystick device interfaces");
	31	MODULE_SUPPORTED_DEVICE("input/js");
	32	MODULE_LICENSE("GPL");
	33
	34	#define JOYDEV_MINOR_BASE 0
	35	#define JOYDEV_MINORS 16
	36	#define JOYDEV_BUFFER_SIZE 64
	37
1da177e4 LT	38	struct joydev {
	39	int exist;
	40	int open;
	41	int minor;
	42	char name[16];
	43	struct input_handle handle;
	44	wait_queue_head_t wait;
d0ffb9be	45	struct list_head client_list;
9657d75c DT	46	struct device dev;
9657d75c DT	47
1da177e4 LT	48	struct js_corr corr[ABS_MAX + 1];
	49	struct JS_DATA_SAVE_TYPE glue;
	50	int nabs;
	51	int nkey;
	52	__u16 keymap[KEY_MAX - BTN_MISC + 1];
	53	__u16 keypam[KEY_MAX - BTN_MISC + 1];
	54	__u8 absmap[ABS_MAX + 1];
	55	__u8 abspam[ABS_MAX + 1];
	56	__s16 abs[ABS_MAX + 1];
	57	};
	58
d0ffb9be	59	struct joydev_client {
1da177e4 LT	60	struct js_event buffer[JOYDEV_BUFFER_SIZE];
	61	int head;
	62	int tail;
	63	int startup;
	64	struct fasync_struct *fasync;
	65	struct joydev *joydev;
	66	struct list_head node;
	67	};
	68
	69	static struct joydev *joydev_table[JOYDEV_MINORS];
	70
	71	static int joydev_correct(int value, struct js_corr *corr)
	72	{
	73	switch (corr->type) {
	74	case JS_CORR_NONE:
	75	break;
	76	case JS_CORR_BROKEN:
	77	value = value > corr->coef[0] ? (value < corr->coef[1] ? 0 :
	78	((corr->coef[3] * (value - corr->coef[1])) >> 14)) :
	79	((corr->coef[2] * (value - corr->coef[0])) >> 14);
	80	break;
	81	default:
	82	return 0;
	83	}
	84
1e0afb28	85	return value < -32767 ? -32767 : (value > 32767 ? 32767 : value);
1da177e4 LT	86	}
	87
	88	static void joydev_event(struct input_handle *handle, unsigned int type, unsigned int code, int value)
	89	{
	90	struct joydev *joydev = handle->private;
d0ffb9be	91	struct joydev_client *client;
1da177e4 LT	92	struct js_event event;
	93
	94	switch (type) {
	95
	96	case EV_KEY:
1e0afb28 DT	97	if (code < BTN_MISC \|\| value == 2)
1e0afb28 DT	98	return;
1da177e4 LT	99	event.type = JS_EVENT_BUTTON;
	100	event.number = joydev->keymap[code - BTN_MISC];
	101	event.value = value;
	102	break;
	103
	104	case EV_ABS:
	105	event.type = JS_EVENT_AXIS;
	106	event.number = joydev->absmap[code];
	107	event.value = joydev_correct(value, joydev->corr + event.number);
1e0afb28 DT	108	if (event.value == joydev->abs[event.number])
1e0afb28 DT	109	return;
1da177e4 LT	110	joydev->abs[event.number] = event.value;
	111	break;
	112
	113	default:
	114	return;
	115	}
	116
6f5eacfc	117	event.time = jiffies_to_msecs(jiffies);
1da177e4	118
d0ffb9be	119	list_for_each_entry(client, &joydev->client_list, node) {
1da177e4	120
d0ffb9be	121	memcpy(client->buffer + client->head, &event, sizeof(struct js_event));
1da177e4	122
d0ffb9be DT	123	if (client->startup == joydev->nabs + joydev->nkey)
	124	if (client->tail == (client->head = (client->head + 1) & (JOYDEV_BUFFER_SIZE - 1)))
	125	client->startup = 0;
1da177e4	126
d0ffb9be	127	kill_fasync(&client->fasync, SIGIO, POLL_IN);
1da177e4 LT	128	}
	129
	130	wake_up_interruptible(&joydev->wait);
	131	}
	132
	133	static int joydev_fasync(int fd, struct file *file, int on)
	134	{
	135	int retval;
d0ffb9be	136	struct joydev_client *client = file->private_data;
1e0afb28	137
d0ffb9be	138	retval = fasync_helper(fd, file, on, &client->fasync);
1e0afb28	139
1da177e4 LT	140	return retval < 0 ? retval : 0;
	141	}
	142
9657d75c	143	static void joydev_free(struct device *dev)
1da177e4	144	{
9657d75c DT	145	struct joydev *joydev = container_of(dev, struct joydev, dev);
9657d75c DT	146
1da177e4 LT	147	joydev_table[joydev->minor] = NULL;
	148	kfree(joydev);
	149	}
	150
d0ffb9be	151	static int joydev_release(struct inode inode, struct file file)
1da177e4	152	{
d0ffb9be DT	153	struct joydev_client *client = file->private_data;
d0ffb9be DT	154	struct joydev *joydev = client->joydev;
1da177e4 LT	155
	156	joydev_fasync(-1, file, 0);
	157
d0ffb9be DT	158	list_del(&client->node);
d0ffb9be DT	159	kfree(client);
1da177e4	160
9657d75c DT	161	if (!--joydev->open && joydev->exist)
	162	input_close_device(&joydev->handle);
	163
	164	put_device(&joydev->dev);
1da177e4	165
1da177e4 LT	166	return 0;
	167	}
	168
	169	static int joydev_open(struct inode inode, struct file file)
	170	{
d0ffb9be DT	171	struct joydev_client *client;
d0ffb9be DT	172	struct joydev *joydev;
1da177e4	173	int i = iminor(inode) - JOYDEV_MINOR_BASE;
d542ed82	174	int error;
1da177e4	175
d0ffb9be DT	176	if (i >= JOYDEV_MINORS)
d0ffb9be DT	177	return -ENODEV;
1da177e4	178
d0ffb9be DT	179	joydev = joydev_table[i];
d0ffb9be DT	180	if (!joydev \|\| !joydev->exist)
1da177e4 LT	181	return -ENODEV;
1da177e4 LT	182
9657d75c DT	183	get_device(&joydev->dev);
9657d75c DT	184
d0ffb9be	185	client = kzalloc(sizeof(struct joydev_client), GFP_KERNEL);
9657d75c DT	186	if (!client) {
	187	error = -ENOMEM;
	188	goto err_put_joydev;
	189	}
1da177e4	190
d0ffb9be DT	191	client->joydev = joydev;
d0ffb9be DT	192	list_add_tail(&client->node, &joydev->client_list);
1da177e4	193
d542ed82 DT	194	if (!joydev->open++ && joydev->exist) {
d542ed82 DT	195	error = input_open_device(&joydev->handle);
9657d75c DT	196	if (error)
9657d75c DT	197	goto err_free_client;
d542ed82	198	}
1da177e4	199
d0ffb9be	200	file->private_data = client;
1da177e4	201	return 0;
9657d75c DT	202
	203	err_free_client:
	204	list_del(&client->node);
	205	kfree(client);
	206	err_put_joydev:
	207	put_device(&joydev->dev);
	208	return error;
1da177e4 LT	209	}
1da177e4 LT	210
d0ffb9be	211	static ssize_t joydev_write(struct file file, const char __user buffer, size_t count, loff_t *ppos)
1da177e4 LT	212	{
	213	return -EINVAL;
	214	}
	215
	216	static ssize_t joydev_read(struct file file, char __user buf, size_t count, loff_t *ppos)
	217	{
d0ffb9be DT	218	struct joydev_client *client = file->private_data;
d0ffb9be DT	219	struct joydev *joydev = client->joydev;
1da177e4 LT	220	struct input_dev *input = joydev->handle.dev;
	221	int retval = 0;
	222
d0ffb9be	223	if (!joydev->exist)
1da177e4 LT	224	return -ENODEV;
	225
	226	if (count < sizeof(struct js_event))
	227	return -EINVAL;
	228
	229	if (count == sizeof(struct JS_DATA_TYPE)) {
	230
	231	struct JS_DATA_TYPE data;
	232	int i;
	233
	234	for (data.buttons = i = 0; i < 32 && i < joydev->nkey; i++)
	235	data.buttons \|= test_bit(joydev->keypam[i], input->key) ? (1 << i) : 0;
	236	data.x = (joydev->abs[0] / 256 + 128) >> joydev->glue.JS_CORR.x;
	237	data.y = (joydev->abs[1] / 256 + 128) >> joydev->glue.JS_CORR.y;
	238
	239	if (copy_to_user(buf, &data, sizeof(struct JS_DATA_TYPE)))
	240	return -EFAULT;
	241
d0ffb9be DT	242	client->startup = 0;
d0ffb9be DT	243	client->tail = client->head;
1da177e4 LT	244
	245	return sizeof(struct JS_DATA_TYPE);
	246	}
	247
d0ffb9be DT	248	if (client->startup == joydev->nabs + joydev->nkey &&
d0ffb9be DT	249	client->head == client->tail && (file->f_flags & O_NONBLOCK))
1e0afb28	250	return -EAGAIN;
1da177e4	251
d0ffb9be DT	252	retval = wait_event_interruptible(joydev->wait,
	253	!joydev->exist \|\|
	254	client->startup < joydev->nabs + joydev->nkey \|\|
	255	client->head != client->tail);
1da177e4 LT	256	if (retval)
	257	return retval;
	258
d0ffb9be	259	if (!joydev->exist)
1da177e4 LT	260	return -ENODEV;
1da177e4 LT	261
d0ffb9be	262	while (client->startup < joydev->nabs + joydev->nkey && retval + sizeof(struct js_event) <= count) {
1da177e4 LT	263
	264	struct js_event event;
	265
6f5eacfc	266	event.time = jiffies_to_msecs(jiffies);
1da177e4	267
d0ffb9be	268	if (client->startup < joydev->nkey) {
1da177e4	269	event.type = JS_EVENT_BUTTON \| JS_EVENT_INIT;
d0ffb9be	270	event.number = client->startup;
1da177e4 LT	271	event.value = !!test_bit(joydev->keypam[event.number], input->key);
	272	} else {
	273	event.type = JS_EVENT_AXIS \| JS_EVENT_INIT;
d0ffb9be	274	event.number = client->startup - joydev->nkey;
1da177e4 LT	275	event.value = joydev->abs[event.number];
	276	}
	277
	278	if (copy_to_user(buf + retval, &event, sizeof(struct js_event)))
	279	return -EFAULT;
	280
d0ffb9be	281	client->startup++;
1da177e4 LT	282	retval += sizeof(struct js_event);
	283	}
	284
d0ffb9be	285	while (client->head != client->tail && retval + sizeof(struct js_event) <= count) {
1da177e4	286
d0ffb9be	287	if (copy_to_user(buf + retval, client->buffer + client->tail, sizeof(struct js_event)))
1da177e4 LT	288	return -EFAULT;
1da177e4 LT	289
d0ffb9be	290	client->tail = (client->tail + 1) & (JOYDEV_BUFFER_SIZE - 1);
1da177e4 LT	291	retval += sizeof(struct js_event);
	292	}
	293
	294	return retval;
	295	}
	296
	297	/* No kernel lock - fine */
	298	static unsigned int joydev_poll(struct file file, poll_table wait)
	299	{
d0ffb9be DT	300	struct joydev_client *client = file->private_data;
d0ffb9be DT	301	struct joydev *joydev = client->joydev;
1e0afb28	302
d0ffb9be DT	303	poll_wait(file, &joydev->wait, wait);
	304	return ((client->head != client->tail \|\| client->startup < joydev->nabs + joydev->nkey) ?
	305	(POLLIN \| POLLRDNORM) : 0) \| (joydev->exist ? 0 : (POLLHUP \| POLLERR));
1da177e4 LT	306	}
1da177e4 LT	307
024ac44c	308	static int joydev_ioctl_common(struct joydev joydev, unsigned int cmd, void __user argp)
1da177e4	309	{
1da177e4	310	struct input_dev *dev = joydev->handle.dev;
1da177e4 LT	311	int i, j;
1da177e4 LT	312
1da177e4 LT	313	switch (cmd) {
	314
	315	case JS_SET_CAL:
	316	return copy_from_user(&joydev->glue.JS_CORR, argp,
024ac44c	317	sizeof(joydev->glue.JS_CORR)) ? -EFAULT : 0;
1e0afb28	318
1da177e4 LT	319	case JS_GET_CAL:
1da177e4 LT	320	return copy_to_user(argp, &joydev->glue.JS_CORR,
024ac44c	321	sizeof(joydev->glue.JS_CORR)) ? -EFAULT : 0;
1e0afb28	322
1da177e4	323	case JS_SET_TIMEOUT:
024ac44c	324	return get_user(joydev->glue.JS_TIMEOUT, (s32 __user *) argp);
1e0afb28	325
1da177e4	326	case JS_GET_TIMEOUT:
024ac44c	327	return put_user(joydev->glue.JS_TIMEOUT, (s32 __user *) argp);
1da177e4 LT	328
1da177e4 LT	329	case JSIOCGVERSION:
024ac44c	330	return put_user(JS_VERSION, (__u32 __user *) argp);
1e0afb28	331
1da177e4	332	case JSIOCGAXES:
024ac44c	333	return put_user(joydev->nabs, (__u8 __user *) argp);
1e0afb28	334
1da177e4	335	case JSIOCGBUTTONS:
024ac44c	336	return put_user(joydev->nkey, (__u8 __user *) argp);
1e0afb28	337
1da177e4 LT	338	case JSIOCSCORR:
1da177e4 LT	339	if (copy_from_user(joydev->corr, argp,
024ac44c	340	sizeof(joydev->corr[0]) * joydev->nabs))
1da177e4 LT	341	return -EFAULT;
	342	for (i = 0; i < joydev->nabs; i++) {
	343	j = joydev->abspam[i];
	344	joydev->abs[i] = joydev_correct(dev->abs[j], joydev->corr + i);
	345	}
	346	return 0;
1e0afb28	347
1da177e4 LT	348	case JSIOCGCORR:
1da177e4 LT	349	return copy_to_user(argp, joydev->corr,
024ac44c	350	sizeof(joydev->corr[0]) * joydev->nabs) ? -EFAULT : 0;
1e0afb28	351
1da177e4 LT	352	case JSIOCSAXMAP:
	353	if (copy_from_user(joydev->abspam, argp, sizeof(__u8) * (ABS_MAX + 1)))
	354	return -EFAULT;
	355	for (i = 0; i < joydev->nabs; i++) {
1e0afb28 DT	356	if (joydev->abspam[i] > ABS_MAX)
1e0afb28 DT	357	return -EINVAL;
1da177e4 LT	358	joydev->absmap[joydev->abspam[i]] = i;
	359	}
	360	return 0;
1e0afb28	361
1da177e4 LT	362	case JSIOCGAXMAP:
	363	return copy_to_user(argp, joydev->abspam,
	364	sizeof(__u8) * (ABS_MAX + 1)) ? -EFAULT : 0;
1e0afb28	365
1da177e4 LT	366	case JSIOCSBTNMAP:
	367	if (copy_from_user(joydev->keypam, argp, sizeof(__u16) * (KEY_MAX - BTN_MISC + 1)))
	368	return -EFAULT;
	369	for (i = 0; i < joydev->nkey; i++) {
1e0afb28 DT	370	if (joydev->keypam[i] > KEY_MAX \|\| joydev->keypam[i] < BTN_MISC)
1e0afb28 DT	371	return -EINVAL;
1da177e4 LT	372	joydev->keymap[joydev->keypam[i] - BTN_MISC] = i;
	373	}
	374	return 0;
1e0afb28	375
1da177e4 LT	376	case JSIOCGBTNMAP:
	377	return copy_to_user(argp, joydev->keypam,
	378	sizeof(__u16) * (KEY_MAX - BTN_MISC + 1)) ? -EFAULT : 0;
1e0afb28	379
1da177e4 LT	380	default:
	381	if ((cmd & ~(_IOC_SIZEMASK << _IOC_SIZESHIFT)) == JSIOCGNAME(0)) {
	382	int len;
1e0afb28 DT	383	if (!dev->name)
1e0afb28 DT	384	return 0;
1da177e4	385	len = strlen(dev->name) + 1;
1e0afb28 DT	386	if (len > _IOC_SIZE(cmd))
	387	len = _IOC_SIZE(cmd);
	388	if (copy_to_user(argp, dev->name, len))
	389	return -EFAULT;
1da177e4 LT	390	return len;
	391	}
	392	}
	393	return -EINVAL;
	394	}
	395
024ac44c JF	396	#ifdef CONFIG_COMPAT
	397	static long joydev_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
	398	{
d0ffb9be DT	399	struct joydev_client *client = file->private_data;
d0ffb9be DT	400	struct joydev *joydev = client->joydev;
024ac44c JF	401	void __user argp = (void __user )arg;
	402	s32 tmp32;
	403	struct JS_DATA_SAVE_TYPE_32 ds32;
	404	int err;
	405
1e0afb28 DT	406	if (!joydev->exist)
	407	return -ENODEV;
	408
024ac44c JF	409	switch(cmd) {
	410	case JS_SET_TIMELIMIT:
	411	err = get_user(tmp32, (s32 __user *) arg);
	412	if (err == 0)
	413	joydev->glue.JS_TIMELIMIT = tmp32;
	414	break;
	415	case JS_GET_TIMELIMIT:
	416	tmp32 = joydev->glue.JS_TIMELIMIT;
	417	err = put_user(tmp32, (s32 __user *) arg);
	418	break;
	419
	420	case JS_SET_ALL:
	421	err = copy_from_user(&ds32, argp,
	422	sizeof(ds32)) ? -EFAULT : 0;
	423	if (err == 0) {
	424	joydev->glue.JS_TIMEOUT = ds32.JS_TIMEOUT;
	425	joydev->glue.BUSY = ds32.BUSY;
	426	joydev->glue.JS_EXPIRETIME = ds32.JS_EXPIRETIME;
	427	joydev->glue.JS_TIMELIMIT = ds32.JS_TIMELIMIT;
	428	joydev->glue.JS_SAVE = ds32.JS_SAVE;
	429	joydev->glue.JS_CORR = ds32.JS_CORR;
	430	}
	431	break;
	432
	433	case JS_GET_ALL:
	434	ds32.JS_TIMEOUT = joydev->glue.JS_TIMEOUT;
	435	ds32.BUSY = joydev->glue.BUSY;
	436	ds32.JS_EXPIRETIME = joydev->glue.JS_EXPIRETIME;
	437	ds32.JS_TIMELIMIT = joydev->glue.JS_TIMELIMIT;
	438	ds32.JS_SAVE = joydev->glue.JS_SAVE;
	439	ds32.JS_CORR = joydev->glue.JS_CORR;
	440
1e0afb28	441	err = copy_to_user(argp, &ds32, sizeof(ds32)) ? -EFAULT : 0;
024ac44c JF	442	break;
	443
	444	default:
	445	err = joydev_ioctl_common(joydev, cmd, argp);
	446	}
	447	return err;
	448	}
	449	#endif /* CONFIG_COMPAT */
	450
	451	static int joydev_ioctl(struct inode inode, struct file file, unsigned int cmd, unsigned long arg)
	452	{
d0ffb9be DT	453	struct joydev_client *client = file->private_data;
d0ffb9be DT	454	struct joydev *joydev = client->joydev;
024ac44c JF	455	void __user argp = (void __user )arg;
024ac44c JF	456
1e0afb28 DT	457	if (!joydev->exist)
1e0afb28 DT	458	return -ENODEV;
024ac44c JF	459
	460	switch(cmd) {
	461	case JS_SET_TIMELIMIT:
	462	return get_user(joydev->glue.JS_TIMELIMIT, (long __user *) arg);
	463	case JS_GET_TIMELIMIT:
	464	return put_user(joydev->glue.JS_TIMELIMIT, (long __user *) arg);
	465	case JS_SET_ALL:
	466	return copy_from_user(&joydev->glue, argp,
	467	sizeof(joydev->glue)) ? -EFAULT : 0;
	468	case JS_GET_ALL:
	469	return copy_to_user(argp, &joydev->glue,
	470	sizeof(joydev->glue)) ? -EFAULT : 0;
	471	default:
	472	return joydev_ioctl_common(joydev, cmd, argp);
	473	}
	474	}
	475
66e66118	476	static const struct file_operations joydev_fops = {
1da177e4 LT	477	.owner = THIS_MODULE,
	478	.read = joydev_read,
	479	.write = joydev_write,
	480	.poll = joydev_poll,
	481	.open = joydev_open,
	482	.release = joydev_release,
	483	.ioctl = joydev_ioctl,
024ac44c JF	484	#ifdef CONFIG_COMPAT
	485	.compat_ioctl = joydev_compat_ioctl,
	486	#endif
1da177e4 LT	487	.fasync = joydev_fasync,
	488	};
	489
5b2a0826 DT	490	static int joydev_connect(struct input_handler handler, struct input_dev dev,
5b2a0826 DT	491	const struct input_device_id *id)
1da177e4 LT	492	{
	493	struct joydev *joydev;
	494	int i, j, t, minor;
5b2a0826	495	int error;
1da177e4 LT	496
	497	for (minor = 0; minor < JOYDEV_MINORS && joydev_table[minor]; minor++);
	498	if (minor == JOYDEV_MINORS) {
	499	printk(KERN_ERR "joydev: no more free joydev devices\n");
5b2a0826	500	return -ENFILE;
1da177e4 LT	501	}
1da177e4 LT	502
5b2a0826 DT	503	joydev = kzalloc(sizeof(struct joydev), GFP_KERNEL);
	504	if (!joydev)
	505	return -ENOMEM;
1da177e4	506
d0ffb9be	507	INIT_LIST_HEAD(&joydev->client_list);
1da177e4 LT	508	init_waitqueue_head(&joydev->wait);
	509
	510	joydev->minor = minor;
	511	joydev->exist = 1;
	512	joydev->handle.dev = dev;
	513	joydev->handle.name = joydev->name;
	514	joydev->handle.handler = handler;
	515	joydev->handle.private = joydev;
9657d75c	516	snprintf(joydev->name, sizeof(joydev->name), "js%d", minor);
1da177e4 LT	517
	518	for (i = 0; i < ABS_MAX + 1; i++)
	519	if (test_bit(i, dev->absbit)) {
	520	joydev->absmap[i] = joydev->nabs;
	521	joydev->abspam[joydev->nabs] = i;
	522	joydev->nabs++;
	523	}
	524
	525	for (i = BTN_JOYSTICK - BTN_MISC; i < KEY_MAX - BTN_MISC + 1; i++)
	526	if (test_bit(i + BTN_MISC, dev->keybit)) {
	527	joydev->keymap[i] = joydev->nkey;
	528	joydev->keypam[joydev->nkey] = i + BTN_MISC;
	529	joydev->nkey++;
	530	}
	531
f24949e8	532	for (i = 0; i < BTN_JOYSTICK - BTN_MISC; i++)
1da177e4 LT	533	if (test_bit(i + BTN_MISC, dev->keybit)) {
	534	joydev->keymap[i] = joydev->nkey;
	535	joydev->keypam[joydev->nkey] = i + BTN_MISC;
	536	joydev->nkey++;
	537	}
	538
	539	for (i = 0; i < joydev->nabs; i++) {
	540	j = joydev->abspam[i];
	541	if (dev->absmax[j] == dev->absmin[j]) {
	542	joydev->corr[i].type = JS_CORR_NONE;
	543	joydev->abs[i] = dev->abs[j];
	544	continue;
	545	}
	546	joydev->corr[i].type = JS_CORR_BROKEN;
	547	joydev->corr[i].prec = dev->absfuzz[j];
	548	joydev->corr[i].coef[0] = (dev->absmax[j] + dev->absmin[j]) / 2 - dev->absflat[j];
	549	joydev->corr[i].coef[1] = (dev->absmax[j] + dev->absmin[j]) / 2 + dev->absflat[j];
	550	if (!(t = ((dev->absmax[j] - dev->absmin[j]) / 2 - 2 * dev->absflat[j])))
	551	continue;
	552	joydev->corr[i].coef[2] = (1 << 29) / t;
	553	joydev->corr[i].coef[3] = (1 << 29) / t;
	554
	555	joydev->abs[i] = joydev_correct(dev->abs[j], joydev->corr + i);
	556	}
	557
9657d75c DT	558	snprintf(joydev->dev.bus_id, sizeof(joydev->dev.bus_id),
	559	"js%d", minor);
	560	joydev->dev.class = &input_class;
	561	joydev->dev.parent = &dev->dev;
	562	joydev->dev.devt = MKDEV(INPUT_MAJOR, JOYDEV_MINOR_BASE + minor);
	563	joydev->dev.release = joydev_free;
	564	device_initialize(&joydev->dev);
5b2a0826	565
9657d75c	566	joydev_table[minor] = joydev;
c9bcd582	567
9657d75c	568	error = device_add(&joydev->dev);
5b2a0826	569	if (error)
9657d75c	570	goto err_free_joydev;
5b2a0826 DT	571
	572	error = input_register_handle(&joydev->handle);
	573	if (error)
9657d75c	574	goto err_delete_joydev;
5b2a0826 DT	575
5b2a0826 DT	576	return 0;
1da177e4	577
9657d75c DT	578	err_delete_joydev:
9657d75c DT	579	device_del(&joydev->dev);
5b2a0826	580	err_free_joydev:
9657d75c	581	put_device(&joydev->dev);
5b2a0826	582	return error;
1da177e4 LT	583	}
1da177e4 LT	584
5b2a0826	585
1da177e4 LT	586	static void joydev_disconnect(struct input_handle *handle)
	587	{
	588	struct joydev *joydev = handle->private;
d0ffb9be	589	struct joydev_client *client;
1da177e4	590
5b2a0826	591	input_unregister_handle(handle);
9657d75c	592	device_del(&joydev->dev);
1da177e4	593
1da177e4 LT	594	joydev->exist = 0;
	595
	596	if (joydev->open) {
	597	input_close_device(handle);
d0ffb9be DT	598	list_for_each_entry(client, &joydev->client_list, node)
d0ffb9be DT	599	kill_fasync(&client->fasync, SIGIO, POLL_HUP);
1dfa2812	600	wake_up_interruptible(&joydev->wait);
9657d75c DT	601	}
	602
	603	put_device(&joydev->dev);
1da177e4 LT	604	}
1da177e4 LT	605
66e66118	606	static const struct input_device_id joydev_blacklist[] = {
1da177e4 LT	607	{
	608	.flags = INPUT_DEVICE_ID_MATCH_EVBIT \| INPUT_DEVICE_ID_MATCH_KEYBIT,
	609	.evbit = { BIT(EV_KEY) },
	610	.keybit = { [LONG(BTN_TOUCH)] = BIT(BTN_TOUCH) },
1e0afb28 DT	611	}, /* Avoid itouchpads, touchscreens and tablets */
1e0afb28 DT	612	{ } /* Terminating entry */
1da177e4 LT	613	};
1da177e4 LT	614
66e66118	615	static const struct input_device_id joydev_ids[] = {
1da177e4 LT	616	{
	617	.flags = INPUT_DEVICE_ID_MATCH_EVBIT \| INPUT_DEVICE_ID_MATCH_ABSBIT,
	618	.evbit = { BIT(EV_ABS) },
	619	.absbit = { BIT(ABS_X) },
	620	},
	621	{
	622	.flags = INPUT_DEVICE_ID_MATCH_EVBIT \| INPUT_DEVICE_ID_MATCH_ABSBIT,
	623	.evbit = { BIT(EV_ABS) },
	624	.absbit = { BIT(ABS_WHEEL) },
	625	},
	626	{
	627	.flags = INPUT_DEVICE_ID_MATCH_EVBIT \| INPUT_DEVICE_ID_MATCH_ABSBIT,
	628	.evbit = { BIT(EV_ABS) },
	629	.absbit = { BIT(ABS_THROTTLE) },
	630	},
1e0afb28	631	{ } /* Terminating entry */
1da177e4 LT	632	};
	633
	634	MODULE_DEVICE_TABLE(input, joydev_ids);
	635
	636	static struct input_handler joydev_handler = {
	637	.event = joydev_event,
	638	.connect = joydev_connect,
	639	.disconnect = joydev_disconnect,
	640	.fops = &joydev_fops,
	641	.minor = JOYDEV_MINOR_BASE,
	642	.name = "joydev",
	643	.id_table = joydev_ids,
1e0afb28	644	.blacklist = joydev_blacklist,
1da177e4 LT	645	};
	646
	647	static int __init joydev_init(void)
	648	{
4263cf0f	649	return input_register_handler(&joydev_handler);
1da177e4 LT	650	}
	651
	652	static void __exit joydev_exit(void)
	653	{
	654	input_unregister_handler(&joydev_handler);
	655	}
	656
	657	module_init(joydev_init);
	658	module_exit(joydev_exit);