patch-2.4.0-test7 linux/drivers/usb/evdev.c

• Lines: 357
• Date: Wed Dec 31 16:00:00 1969
• Orig file: v2.4.0-test6/linux/drivers/usb/evdev.c
• Orig date: Wed Aug 9 19:19:51 2000

diff -u --recursive --new-file v2.4.0-test6/linux/drivers/usb/evdev.c linux/drivers/usb/evdev.c
@@ -1,356 +0,0 @@
-/*
- * $Id: evdev.c,v 1.10 2000/06/23 09:23:00 vojtech Exp $
- *
- *  Copyright (c) 1999-2000 Vojtech Pavlik
- *
- *  Event char devices, giving access to raw input device events.
- *
- *  Sponsored by SuSE
- */
-
-/*
- * 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
- * 
- * Should you need to contact me, the author, you can do so either by
- * e-mail - mail your message to <vojtech@suse.cz>, or by paper mail:
- * Vojtech Pavlik, Ucitelska 1576, Prague 8, 182 00 Czech Republic
- */
-
-#define EVDEV_MINOR_BASE	64
-#define EVDEV_MINORS		32
-#define EVDEV_BUFFER_SIZE	64
-
-#include <linux/poll.h>
-#include <linux/malloc.h>
-#include <linux/module.h>
-#include <linux/init.h>
-#include <linux/input.h>
-#include <linux/smp_lock.h>
-
-struct evdev {
-	int exist;
-	int open;
-	int minor;
-	struct input_handle handle;
-	wait_queue_head_t wait;
-	devfs_handle_t devfs;
-	struct evdev_list *list;
-};
-
-struct evdev_list {
-	struct input_event buffer[EVDEV_BUFFER_SIZE];
-	int head;
-	int tail;
-	struct fasync_struct *fasync;
-	struct evdev *evdev;
-	struct evdev_list *next;
-};
-
-static struct evdev *evdev_table[EVDEV_MINORS] = { NULL, /* ... */ };
-
-static void evdev_event(struct input_handle *handle, unsigned int type, unsigned int code, int value)
-{
-	struct evdev *evdev = handle->private;
-	struct evdev_list *list = evdev->list;
-
-	while (list) {
-
-		get_fast_time(&list->buffer[list->head].time);
-		list->buffer[list->head].type = type;
-		list->buffer[list->head].code = code;
-		list->buffer[list->head].value = value;
-		list->head = (list->head + 1) & (EVDEV_BUFFER_SIZE - 1);
-		
-		kill_fasync(&list->fasync, SIGIO, POLL_IN);
-
-		list = list->next;
-	}
-
-	wake_up_interruptible(&evdev->wait);
-}
-
-static int evdev_fasync(int fd, struct file *file, int on)
-{
-	int retval;
-	struct evdev_list *list = file->private_data;
-	retval = fasync_helper(fd, file, on, &list->fasync);
-	return retval < 0 ? retval : 0;
-}
-
-static int evdev_release(struct inode * inode, struct file * file)
-{
-	struct evdev_list *list = file->private_data;
-	struct evdev_list **listptr;
-
-	lock_kernel();
-	listptr = &list->evdev->list;
-	evdev_fasync(-1, file, 0);
-
-	while (*listptr && (*listptr != list))
-		listptr = &((*listptr)->next);
-	*listptr = (*listptr)->next;
-
-	if (!--list->evdev->open) {
-		if (list->evdev->exist) {
-			input_close_device(&list->evdev->handle);	
-		} else {
-			input_unregister_minor(list->evdev->devfs);
-			evdev_table[list->evdev->minor] = NULL;
-			kfree(list->evdev);
-		}
-	}
-
-	kfree(list);
-	unlock_kernel();
-
-	return 0;
-}
-
-static int evdev_open(struct inode * inode, struct file * file)
-{
-	struct evdev_list *list;
-	int i = MINOR(inode->i_rdev) - EVDEV_MINOR_BASE;
-
-	if (i > EVDEV_MINORS || !evdev_table[i])
-		return -ENODEV;
-
-	if (!(list = kmalloc(sizeof(struct evdev_list), GFP_KERNEL)))
-		return -ENOMEM;
-	memset(list, 0, sizeof(struct evdev_list));
-
-	list->evdev = evdev_table[i];
-	list->next = evdev_table[i]->list;
-	evdev_table[i]->list = list;
-
-	file->private_data = list;
-
-	if (!list->evdev->open++)
-		if (list->evdev->exist)
-			input_open_device(&list->evdev->handle);	
-
-	return 0;
-}
-
-static ssize_t evdev_write(struct file * file, const char * buffer, size_t count, loff_t *ppos)
-{
-	return -EINVAL;
-}
-
-static ssize_t evdev_read(struct file * file, char * buffer, size_t count, loff_t *ppos)
-{
-	DECLARE_WAITQUEUE(wait, current);
-	struct evdev_list *list = file->private_data;
-	int retval = 0;
-
-	if (list->head == list->tail) {
-
-		add_wait_queue(&list->evdev->wait, &wait);
-		current->state = TASK_INTERRUPTIBLE;
-
-		while (list->head == list->tail) {
-
-			if (file->f_flags & O_NONBLOCK) {
-				retval = -EAGAIN;
-				break;
-			}
-			if (signal_pending(current)) {
-				retval = -ERESTARTSYS;
-				break;
-			}
-
-			schedule();
-		}
-
-		current->state = TASK_RUNNING;
-		remove_wait_queue(&list->evdev->wait, &wait);
-	}
-
-	if (retval)
-		return retval;
-
-	while (list->head != list->tail && retval + sizeof(struct input_event) <= count) {
-		if (copy_to_user(buffer + retval, list->buffer + list->tail,
-			 sizeof(struct input_event))) return -EFAULT;
-		list->tail = (list->tail + 1) & (EVDEV_BUFFER_SIZE - 1);
-		retval += sizeof(struct input_event);
-	}
-
-	return retval;	
-}
-
-/* No kernel lock - fine */
-static unsigned int evdev_poll(struct file *file, poll_table *wait)
-{
-	struct evdev_list *list = file->private_data;
-	poll_wait(file, &list->evdev->wait, wait);
-	if (list->head != list->tail)
-		return POLLIN | POLLRDNORM;
-	return 0;
-}
-
-static int evdev_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
-{
-	struct evdev_list *list = file->private_data;
-	struct evdev *evdev = list->evdev;
-	struct input_dev *dev = evdev->handle.dev;
-	int retval;
-
-	switch (cmd) {
-
-		case EVIOCGVERSION:
-			return put_user(EV_VERSION, (int *) arg);
-
-		case EVIOCGID:
-			if ((retval = put_user(dev->idbus,     ((short *) arg) + 0))) return retval;
-			if ((retval = put_user(dev->idvendor,  ((short *) arg) + 1))) return retval;
-			if ((retval = put_user(dev->idproduct, ((short *) arg) + 2))) return retval;
-			if ((retval = put_user(dev->idversion, ((short *) arg) + 3))) return retval;
-			return 0;
-
-		default:
-
-			if (_IOC_TYPE(cmd) != 'E' || _IOC_DIR(cmd) != _IOC_READ)
-				return -EINVAL;
-
-			if ((_IOC_NR(cmd) & ~EV_MAX) == _IOC_NR(EVIOCGBIT(0,0))) {
-
-				long *bits;
-				int len;
-
-				switch (_IOC_NR(cmd) & EV_MAX) {
-					case      0: bits = dev->evbit;  len = EV_MAX;  break;
-					case EV_KEY: bits = dev->keybit; len = KEY_MAX; break;
-					case EV_REL: bits = dev->relbit; len = REL_MAX; break;
-					case EV_ABS: bits = dev->absbit; len = ABS_MAX; break;
-					case EV_LED: bits = dev->ledbit; len = LED_MAX; break;
-					case EV_SND: bits = dev->sndbit; len = SND_MAX; break;
-					default: return -EINVAL;
-				}
-				len = NBITS(len) * sizeof(long);
-				if (len > _IOC_SIZE(cmd)) {
-					printk(KERN_WARNING "evdev.c: Truncating bitfield length from %d to %d\n",
-						len, _IOC_SIZE(cmd));
-					len = _IOC_SIZE(cmd);
-				}
-				return copy_to_user((char *) arg, bits, len) ? -EFAULT : len;
-			}
-
-			if (_IOC_NR(cmd) == _IOC_NR(EVIOCGNAME(0))) {
-				int len;
-				if (!dev->name) return 0;
-				len = strlen(dev->name) + 1;
-				if (len > _IOC_SIZE(cmd)) len = _IOC_SIZE(cmd);
-				return copy_to_user((char *) arg, dev->name, len) ? -EFAULT : len;
-			}
-
-			if ((_IOC_NR(cmd) & ~ABS_MAX) == _IOC_NR(EVIOCGABS(0))) {
-
-				int t = _IOC_NR(cmd) & ABS_MAX;
-
-				if ((retval = put_user(dev->abs[t],     ((int *) arg) + 0))) return retval;
-				if ((retval = put_user(dev->absmin[t],  ((int *) arg) + 1))) return retval;
-				if ((retval = put_user(dev->absmax[t],  ((int *) arg) + 2))) return retval;
-				if ((retval = put_user(dev->absfuzz[t], ((int *) arg) + 3))) return retval;
-				if ((retval = put_user(dev->absflat[t], ((int *) arg) + 4))) return retval;
-
-				return 0;
-			}
-	}
-	return -EINVAL;
-}
-
-static struct file_operations evdev_fops = {
-	owner:		THIS_MODULE,
-	read:		evdev_read,
-	write:		evdev_write,
-	poll:		evdev_poll,
-	open:		evdev_open,
-	release:	evdev_release,
-	ioctl:		evdev_ioctl,
-	fasync:		evdev_fasync,
-};
-
-static struct input_handle *evdev_connect(struct input_handler *handler, struct input_dev *dev)
-{
-	struct evdev *evdev;
-	int minor;
-
-	for (minor = 0; minor < EVDEV_MINORS && evdev_table[minor]; minor++);
-	if (evdev_table[minor]) {
-		printk(KERN_ERR "evdev: no more free evdev devices\n");
-		return NULL;
-	}
-
-	if (!(evdev = kmalloc(sizeof(struct evdev), GFP_KERNEL)))
-		return NULL;
-	memset(evdev, 0, sizeof(struct evdev));
-
-	init_waitqueue_head(&evdev->wait);
-
-	evdev->minor = minor;
-	evdev_table[minor] = evdev;
-
-	evdev->handle.dev = dev;
-	evdev->handle.handler = handler;
-	evdev->handle.private = evdev;
-
-	evdev->exist = 1;
-
-	evdev->devfs = input_register_minor("event%d", minor, EVDEV_MINOR_BASE);
-
-	printk(KERN_INFO "event%d: Event device for input%d\n", minor, dev->number);
-
-	return &evdev->handle;
-}
-
-static void evdev_disconnect(struct input_handle *handle)
-{
-	struct evdev *evdev = handle->private;
-
-	evdev->exist = 0;
-
-	if (evdev->open) {
-		input_close_device(handle);
-	} else {
-		input_unregister_minor(evdev->devfs);
-		evdev_table[evdev->minor] = NULL;
-		kfree(evdev);
-	}
-}
-	
-static struct input_handler evdev_handler = {
-	event:		evdev_event,
-	connect:	evdev_connect,
-	disconnect:	evdev_disconnect,
-	fops:		&evdev_fops,
-	minor:		EVDEV_MINOR_BASE,
-};
-
-static int __init evdev_init(void)
-{
-	input_register_handler(&evdev_handler);
-	return 0;
-}
-
-static void __exit evdev_exit(void)
-{
-	input_unregister_handler(&evdev_handler);
-}
-
-module_init(evdev_init);
-module_exit(evdev_exit);
-
-MODULE_AUTHOR("Vojtech Pavlik <vojtech@suse.cz>");
-MODULE_DESCRIPTION("Event character device driver");