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

• Lines: 498
• Date: Wed Dec 31 16:00:00 1969
• Orig file: v2.4.0-test6/linux/drivers/usb/joydev.c
• Orig date: Wed Aug 9 19:19:51 2000

diff -u --recursive --new-file v2.4.0-test6/linux/drivers/usb/joydev.c linux/drivers/usb/joydev.c
@@ -1,497 +0,0 @@
-/*
- * $Id: joydev.c,v 1.11 2000/06/23 09:23:00 vojtech Exp $
- *
- *  Copyright (c) 1999-2000 Vojtech Pavlik 
- *  Copyright (c) 1999 Colin Van Dyke 
- *
- *  Joystick device driver for the input driver suite.
- *
- *  Sponsored by SuSE and Intel
- */
-
-/*
- * 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
- */
-
-#include <asm/io.h>
-#include <asm/system.h>
-#include <asm/segment.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/malloc.h>
-#include <linux/mm.h>
-#include <linux/miscdevice.h>
-#include <linux/module.h>
-#include <linux/poll.h>
-#include <linux/init.h>
-#include <linux/smp_lock.h>
-
-#define JOYDEV_MINOR_BASE	0
-#define JOYDEV_MINORS		32
-#define JOYDEV_BUFFER_SIZE	64
-
-struct joydev {
-	int exist;
-	int open;
-	int minor;
-	struct input_handle handle;
-	wait_queue_head_t wait;
-	devfs_handle_t devfs;
-	struct joydev *next;
-	struct joydev_list *list;
-	struct js_corr corr[ABS_MAX];
-	struct JS_DATA_SAVE_TYPE glue;
-	int nabs;
-	int nkey;
-	__u16 keymap[KEY_MAX - BTN_MISC];
-	__u16 keypam[KEY_MAX - BTN_MISC];
-	__u8 absmap[ABS_MAX];
-	__u8 abspam[ABS_MAX];
-	__s16 abs[ABS_MAX];
-};
-
-struct joydev_list {
-	struct js_event buffer[JOYDEV_BUFFER_SIZE];
-	int head;
-	int tail;
-	int startup;
-	struct fasync_struct *fasync;
-	struct joydev *joydev;
-	struct joydev_list *next;
-};
-
-static struct joydev *joydev_table[JOYDEV_MINORS];
-
-MODULE_AUTHOR("Vojtech Pavlik <vojtech@suse.cz>");
-MODULE_DESCRIPTION("Joystick device driver");
-MODULE_SUPPORTED_DEVICE("input/js");
-
-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;
-	}
-
-	if (value < -32767) return -32767;
-	if (value >  32767) return  32767;
-
-	return value;
-}
-
-static void joydev_event(struct input_handle *handle, unsigned int type, unsigned int code, int value)
-{
-	struct joydev *joydev = handle->private;
-	struct joydev_list *list = joydev->list;
-	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 * (1000 / HZ);
-
-	while (list) {
-
-		memcpy(list->buffer + list->head, &event, sizeof(struct js_event));
-
-		if (list->startup == joydev->nabs + joydev->nkey)
-			if (list->tail == (list->head = (list->head + 1) & (JOYDEV_BUFFER_SIZE - 1)))
-				list->startup = 0;
-
-		kill_fasync(&list->fasync, SIGIO, POLL_IN);
-
-		list = list->next;
-	}
-
-	wake_up_interruptible(&joydev->wait);
-}
-
-static int joydev_fasync(int fd, struct file *file, int on)
-{
-	int retval;
-	struct joydev_list *list = file->private_data;
-	retval = fasync_helper(fd, file, on, &list->fasync);
-	return retval < 0 ? retval : 0;
-}
-
-static int joydev_release(struct inode * inode, struct file * file)
-{
-	struct joydev_list *list = file->private_data;
-	struct joydev_list **listptr;
-
-	lock_kernel();
-	listptr = &list->joydev->list;
-	joydev_fasync(-1, file, 0);
-
-	while (*listptr && (*listptr != list))
-		listptr = &((*listptr)->next);
-	*listptr = (*listptr)->next;
-
-	if (!--list->joydev->open) {
-		if (list->joydev->exist) {
-			input_close_device(&list->joydev->handle);
-		} else {
-			input_unregister_minor(list->joydev->devfs);
-			joydev_table[list->joydev->minor] = NULL;
-			kfree(list->joydev);
-		}
-	}
-
-	kfree(list);
-	unlock_kernel();
-
-	return 0;
-}
-
-static int joydev_open(struct inode *inode, struct file *file)
-{
-	struct joydev_list *list;
-	int i = MINOR(inode->i_rdev) - JOYDEV_MINOR_BASE;
-
-	if (i > JOYDEV_MINORS || !joydev_table[i])
-		return -ENODEV;
-
-	if (!(list = kmalloc(sizeof(struct joydev_list), GFP_KERNEL)))
-		return -ENOMEM;
-	memset(list, 0, sizeof(struct joydev_list));
-
-	list->joydev = joydev_table[i];
-	list->next = joydev_table[i]->list;
-	joydev_table[i]->list = list;	
-
-	file->private_data = list;
-
-	if (!list->joydev->open++)
-		if (list->joydev->exist)
-			input_open_device(&list->joydev->handle);
-
-	return 0;
-}
-
-static ssize_t joydev_write(struct file * file, const char * buffer, size_t count, loff_t *ppos)
-{
-	return -EINVAL;
-}
-
-static ssize_t joydev_read(struct file *file, char *buf, size_t count, loff_t *ppos)
-{
-	DECLARE_WAITQUEUE(wait, current);
-	struct joydev_list *list = file->private_data;
-	struct joydev *joydev = list->joydev;
-	struct input_dev *input = joydev->handle.dev;
-	int retval = 0;
-
-	if (count < sizeof(struct js_event))
-		return -EINVAL;
-
-	if (count == sizeof(struct JS_DATA_TYPE)) {
-
-		struct JS_DATA_TYPE data;
-
-		data.buttons =  ((joydev->nkey > 0 && test_bit(joydev->keypam[0], input->key)) ? 1 : 0) |
-				((joydev->nkey > 1 && test_bit(joydev->keypam[1], input->key)) ? 2 : 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;
-
-		list->startup = 0;
-		list->tail = list->head;
-
-		return sizeof(struct JS_DATA_TYPE);
-	}
-
-	if (list->head == list->tail && list->startup == joydev->nabs + joydev->nkey) {
-
-		add_wait_queue(&list->joydev->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->joydev->wait, &wait);
-	}
-
-	if (retval)
-		return retval;
-
-	while (list->startup < joydev->nabs + joydev->nkey && retval + sizeof(struct js_event) <= count) {
-
-		struct js_event event;
-
-		event.time = jiffies * (1000/HZ);
-
-		if (list->startup < joydev->nkey) {
-			event.type = JS_EVENT_BUTTON | JS_EVENT_INIT;
-			event.number = list->startup;
-			event.value = !!test_bit(joydev->keypam[event.number], input->key);
-		} else {
-			event.type = JS_EVENT_AXIS | JS_EVENT_INIT;
-			event.number = list->startup - joydev->nkey;
-			event.value = joydev->abs[event.number];
-		}
-
-		if (copy_to_user(buf + retval, &event, sizeof(struct js_event)))
-			return -EFAULT;
-
-		list->startup++;
-		retval += sizeof(struct js_event);
-	}
-
-	while (list->head != list->tail && retval + sizeof(struct js_event) <= count) {
-
-		if (copy_to_user(buf + retval, list->buffer + list->tail, sizeof(struct js_event)))
-			return -EFAULT;
-
-		list->tail = (list->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_list *list = file->private_data;
-	poll_wait(file, &list->joydev->wait, wait);
-	if (list->head != list->tail || list->startup < list->joydev->nabs + list->joydev->nkey)
-		return POLLIN | POLLRDNORM;
-	return 0;
-}
-
-static int joydev_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
-{
-	struct joydev_list *list = file->private_data;
-	struct joydev *joydev = list->joydev;
-	struct input_dev *dev = joydev->handle.dev;
-
-
-	switch (cmd) {
-
-		case JS_SET_CAL:
-			return copy_from_user(&joydev->glue.JS_CORR, (struct JS_DATA_TYPE *) arg,
-				sizeof(struct JS_DATA_TYPE)) ? -EFAULT : 0;
-		case JS_GET_CAL:
-			return copy_to_user((struct JS_DATA_TYPE *) arg, &joydev->glue.JS_CORR,
-				sizeof(struct JS_DATA_TYPE)) ? -EFAULT : 0;
-		case JS_SET_TIMEOUT:
-			return get_user(joydev->glue.JS_TIMEOUT, (int *) arg);
-		case JS_GET_TIMEOUT:
-			return put_user(joydev->glue.JS_TIMEOUT, (int *) arg);
-		case JS_SET_TIMELIMIT:
-			return get_user(joydev->glue.JS_TIMELIMIT, (long *) arg);
-		case JS_GET_TIMELIMIT:
-			return put_user(joydev->glue.JS_TIMELIMIT, (long *) arg);
-		case JS_SET_ALL:
-			return copy_from_user(&joydev->glue, (struct JS_DATA_SAVE_TYPE *) arg,
-						sizeof(struct JS_DATA_SAVE_TYPE)) ? -EFAULT : 0;
-		case JS_GET_ALL:
-			return copy_to_user((struct JS_DATA_SAVE_TYPE *) arg, &joydev->glue,
-						sizeof(struct JS_DATA_SAVE_TYPE)) ? -EFAULT : 0;
-
-		case JSIOCGVERSION:
-			return put_user(JS_VERSION, (__u32 *) arg);
-		case JSIOCGAXES:
-			return put_user(joydev->nabs, (__u8 *) arg);
-		case JSIOCGBUTTONS:
-			return put_user(joydev->nkey, (__u8 *) arg);
-		case JSIOCSCORR:
-			return copy_from_user(joydev->corr, (struct js_corr *) arg,
-						sizeof(struct js_corr) * joydev->nabs) ? -EFAULT : 0;
-		case JSIOCGCORR:
-			return copy_to_user((struct js_corr *) arg, joydev->corr,
-						sizeof(struct js_corr) * joydev->nabs) ? -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((char *) arg, dev->name, len)) return -EFAULT;
-				return len;
-			}
-	}
-	return -EINVAL;
-}
-
-static 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,
-	fasync:		joydev_fasync,
-};
-
-static struct input_handle *joydev_connect(struct input_handler *handler, struct input_dev *dev)
-{
-	struct joydev *joydev;
-	int i, j, minor;
-
-	if (!(test_bit(EV_KEY, dev->evbit) && test_bit(EV_ABS, dev->evbit) &&
-	      test_bit(ABS_X, dev->absbit) && test_bit(ABS_Y, dev->absbit) &&
-	     (test_bit(BTN_TRIGGER, dev->keybit) || test_bit(BTN_A, dev->keybit)
-		|| test_bit(BTN_1, dev->keybit)))) return NULL; 
-
-	for (minor = 0; minor < JOYDEV_MINORS && joydev_table[minor]; minor++);
-	if (joydev_table[minor]) {
-		printk(KERN_ERR "joydev: no more free joydev devices\n");
-		return NULL;
-	}
-
-	if (!(joydev = kmalloc(sizeof(struct joydev), GFP_KERNEL)))
-		return NULL;
-	memset(joydev, 0, sizeof(struct joydev));
-
-	init_waitqueue_head(&joydev->wait);
-
-	joydev->minor = minor;
-	joydev_table[minor] = joydev;
-
-	joydev->handle.dev = dev;
-	joydev->handle.handler = handler;
-	joydev->handle.private = joydev;
-
-	joydev->exist = 1;
-
-	for (i = 0; i < ABS_MAX; 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; 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;
-			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];
-		joydev->corr[i].coef[2] = (1 << 29) / ((dev->absmax[j] - dev->absmin[j]) / 2 - 2 * dev->absflat[j]);
-		joydev->corr[i].coef[3] = (1 << 29) / ((dev->absmax[j] - dev->absmin[j]) / 2 - 2 * dev->absflat[j]);
-
-		joydev->abs[i] = joydev_correct(dev->abs[j], joydev->corr + i);
-	}
-
-	joydev->devfs = input_register_minor("js%d", minor, JOYDEV_MINOR_BASE);
-
-	printk(KERN_INFO "js%d: Joystick device for input%d\n", minor, dev->number);
-
-	return &joydev->handle;
-}
-
-static void joydev_disconnect(struct input_handle *handle)
-{
-	struct joydev *joydev = handle->private;
-
-	joydev->exist = 0;
-
-	if (joydev->open) {
-		input_close_device(handle);	
-	} else {
-		input_unregister_minor(joydev->devfs);
-		joydev_table[joydev->minor] = NULL;
-		kfree(joydev);
-	}
-}
-
-static struct input_handler joydev_handler = {
-	event:		joydev_event,
-	connect:	joydev_connect,
-	disconnect:	joydev_disconnect,
-	fops:		&joydev_fops,
-	minor:		JOYDEV_MINOR_BASE,
-};
-
-static int __init joydev_init(void)
-{
-	input_register_handler(&joydev_handler);
-	return 0;
-}
-
-static void __exit joydev_exit(void)
-{
-	input_unregister_handler(&joydev_handler);
-}
-
-module_init(joydev_init);
-module_exit(joydev_exit);