patch-2.3.36 linux/drivers/usb/mousedev.c

• Lines: 458
• Date: Sun Jan 2 12:12:59 2000
• Orig file: v2.3.35/linux/drivers/usb/mousedev.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.3.35/linux/drivers/usb/mousedev.c linux/drivers/usb/mousedev.c
@@ -0,0 +1,457 @@
+/*
+ *  mousedev.c  Version 0.1
+ *
+ *  Copyright (c) 1999 Vojtech Pavlik
+ *
+ *  Input driver to PS/2 or ImPS/2 device driver module.
+ *
+ *  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 <[email protected]>, or by paper mail:
+ * Vojtech Pavlik, Ucitelska 1576, Prague 8, 182 00 Czech Republic
+ */
+
+#define MOUSEDEV_MINOR_BASE 	32
+
+#include <linux/miscdevice.h>
+#include <linux/malloc.h>
+#include <linux/poll.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/input.h>
+#include <linux/config.h>
+
+struct mousedev {
+	char name[32];
+	int used;
+	struct input_handle handle;
+	struct miscdevice misc;
+	wait_queue_head_t wait;
+	struct mousedev_list *list;
+};
+
+struct mousedev_list {
+	struct fasync_struct *fasync;
+	struct mousedev *mousedev;
+	struct mousedev_list *next;
+	int dx, dy, dz;
+	unsigned char ps2[6];
+	unsigned char buttons;
+	unsigned char ready, buffer, bufsiz;
+	unsigned char mode, genseq, impseq;
+};
+
+#define MOUSEDEV_GENIUS_LEN	5
+#define MOUSEDEV_IMPS_LEN	6
+
+static unsigned char mousedev_genius_seq[] = { 0xe8, 3, 0xe6, 0xe6, 0xe6 };
+static unsigned char mousedev_imps_seq[] = { 0xf3, 200, 0xf3, 100, 0xf3, 80 };
+
+#ifdef CONFIG_INPUT_MOUSEDEV_MIX
+static struct mousedev mousedev_single;
+#else
+static unsigned long mousedev_miscbits = 0;
+static struct mousedev *mousedev_base[BITS_PER_LONG];
+#endif
+
+static void mousedev_event(struct input_handle *handle, unsigned int type, unsigned int code, int value)
+{
+	struct mousedev *mousedev = handle->private;
+	struct mousedev_list *list = mousedev->list;
+	int index;
+
+	while (list) {
+		switch (type) {
+			case EV_REL:
+				switch (code) {
+					case REL_X:	list->dx += value; break;
+					case REL_Y:	list->dy -= value; break;
+					case REL_WHEEL:	if (list->mode) list->dz += value; break;
+				}
+				break;
+
+			case EV_KEY:
+				switch (code) {
+					case BTN_LEFT:   index = 0; break;
+					case BTN_EXTRA:  if (list->mode > 1) { index = 4; break; }
+					case BTN_RIGHT:  index = 1; break;
+					case BTN_SIDE:   if (list->mode > 1) { index = 3; break; }
+					case BTN_MIDDLE: index = 2; break;	
+					default: index = 0;
+				}
+				switch (value) {
+					case 0: clear_bit(index, &list->buttons); break;
+					case 1: set_bit(index, &list->buttons); break;
+					case 2: return;
+				}
+				break;
+		}
+				
+		list->ready = 1;
+
+		if (list->fasync)
+			kill_fasync(list->fasync, SIGIO, POLL_IN);
+
+		list = list->next;
+	}
+
+	wake_up_interruptible(&mousedev->wait);
+}
+
+static int mousedev_fasync(int fd, struct file *file, int on)
+{
+	int retval;
+	struct mousedev_list *list = file->private_data;
+	retval = fasync_helper(fd, file, on, &list->fasync);
+	return retval < 0 ? retval : 0;
+}
+
+static int mousedev_release(struct inode * inode, struct file * file)
+{
+	struct mousedev_list *list = file->private_data;
+	struct mousedev_list **listptr = &list->mousedev->list;
+
+	mousedev_fasync(-1, file, 0);
+
+	while (*listptr && (*listptr != list))
+		listptr = &((*listptr)->next);
+	*listptr = (*listptr)->next;
+	
+#ifndef CONFIG_INPUT_MOUSEDEV_MIX
+	if (!--list->mousedev->used) {
+		clear_bit(list->mousedev->misc.minor - MOUSEDEV_MINOR_BASE, &mousedev_miscbits);
+		misc_deregister(&list->mousedev->misc);
+		kfree(list->mousedev);
+	}
+#endif
+
+	kfree(list);
+
+	MOD_DEC_USE_COUNT;
+	return 0;
+}
+
+static int mousedev_open(struct inode * inode, struct file * file)
+{
+	struct mousedev_list *list;
+
+#ifndef CONFIG_INPUT_MOUSEDEV_MIX
+	int i = MINOR(inode->i_rdev) - MOUSEDEV_MINOR_BASE;
+	if (i > BITS_PER_LONG || !test_bit(i, &mousedev_miscbits))
+		return -ENODEV;
+#endif
+
+	if (!(list = kmalloc(sizeof(struct mousedev_list), GFP_KERNEL)))
+		return -ENOMEM;
+
+	memset(list, 0, sizeof(struct mousedev_list));
+
+
+#ifdef CONFIG_INPUT_MOUSEDEV_MIX
+	list->mousedev = &mousedev_single;
+	list->next = mousedev_single.list;
+	mousedev_single.list = list;
+#else
+	list->mousedev = mousedev_base[i];
+	list->next = mousedev_base[i]->list;
+	mousedev_base[i]->list = list;
+	list->mousedev->used++;
+#endif
+
+	file->private_data = list;
+
+	MOD_INC_USE_COUNT;
+	return 0;
+}
+
+static void mousedev_packet(struct mousedev_list *list, unsigned char off)
+{
+	list->ps2[off] = 0x08 | ((list->dx < 0) << 4) | ((list->dy < 0) << 5) | (list->buttons & 0x07);
+	list->ps2[off + 1] = (list->dx > 127 ? 127 : (list->dx < -127 ? -127 : list->dx));
+	list->ps2[off + 2] = (list->dy > 127 ? 127 : (list->dy < -127 ? -127 : list->dy));
+	list->dx = list->dy = 0;
+	list->bufsiz = off + 3;
+
+	if (list->mode > 1)
+		list->ps2[off] |= ((list->buttons & 0x30) << 2);
+	
+	if (list->mode) {
+		list->ps2[off + 3] = (list->dz > 127 ? 127 : (list->dz < -127 ? -127 : list->dz));
+		list->bufsiz++;
+		list->dz = 0;
+	}
+	list->ready = 0;
+	list->buffer = list->bufsiz;
+}
+
+
+static ssize_t mousedev_write(struct file * file, const char * buffer, size_t count, loff_t *ppos)
+{
+	struct mousedev_list *list = file->private_data;
+	unsigned char c;
+	int i;
+
+	for (i = 0; i < count; i++) {
+
+		c = buffer[i];
+
+#ifdef MOUSEDEV_DEBUG
+		printk(KERN_DEBUG "mousedev: received char %#x\n", c);
+#endif
+
+		if (c == mousedev_genius_seq[list->genseq]) {
+			if (++list->genseq == MOUSEDEV_GENIUS_LEN) {
+				list->genseq = 0;
+				list->ready = 1;
+				list->mode = 2;
+			}
+		} else list->genseq = 0;
+
+		if (c == mousedev_imps_seq[list->impseq]) {
+			if (++list->impseq == MOUSEDEV_IMPS_LEN) {
+				list->impseq = 0;
+				list->ready = 1;
+				list->mode = 1;
+			}
+		} else list->impseq = 0;
+
+		list->ps2[0] = 0xfa;
+		list->bufsiz = 1;
+
+		switch (c) {
+
+			case 0xeb: /* Poll */
+				mousedev_packet(list, 1);
+				break;
+
+			case 0xf2: /* Get ID */
+				list->ps2[1] = (list->mode == 1) ? 3 : 0;
+				list->bufsiz = 2;
+				break;
+
+			case 0xe9: /* Get info */
+				if (list->mode == 2) {
+					list->ps2[1] = 0x00; list->ps2[2] = 0x33; list->ps2[3] = 0x55;
+				} else {
+					list->ps2[1] = 0x60; list->ps2[2] = 3; list->ps2[3] = 200;
+				}
+				list->bufsiz = 4;
+				break;
+		}
+
+		list->buffer = list->bufsiz;
+	}
+
+	if (list->fasync)
+		kill_fasync(list->fasync, SIGIO, POLL_IN);
+
+	wake_up_interruptible(&list->mousedev->wait);
+		
+	return count;
+}
+
+static ssize_t mousedev_read(struct file * file, char * buffer, size_t count, loff_t *ppos)
+{
+	DECLARE_WAITQUEUE(wait, current);
+	struct mousedev_list *list = file->private_data;
+	int retval = 0;
+
+	if (!list->ready && !list->buffer) {
+
+		add_wait_queue(&list->mousedev->wait, &wait);
+		current->state = TASK_INTERRUPTIBLE;
+
+		while (!list->ready) {
+
+			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->mousedev->wait, &wait);
+	}
+
+	if (retval)
+		return retval;
+
+	if (!list->buffer)
+		mousedev_packet(list, 0);
+
+	if (count > list->buffer)
+		count = list->buffer;
+
+	if (copy_to_user(buffer, list->ps2 + list->bufsiz - list->buffer, count))
+		return -EFAULT;
+	
+	list->buffer -= count;
+
+	return count;	
+}
+
+static unsigned int mousedev_poll(struct file *file, poll_table *wait)
+{
+	struct mousedev_list *list = file->private_data;
+	poll_wait(file, &list->mousedev->wait, wait);
+	if (list->ready || list->buffer)
+		return POLLIN | POLLRDNORM;
+	return 0;
+}
+
+struct file_operations mousedev_fops = {
+	read:		mousedev_read,
+	write:		mousedev_write,
+	poll:		mousedev_poll,
+	open:		mousedev_open,
+	release:	mousedev_release,
+	fasync:		mousedev_fasync,
+};
+
+static int mousedev_connect(struct input_handler *handler, struct input_dev *dev)
+{
+
+	if (!(test_bit(EV_KEY, dev->evbit) && test_bit(EV_REL, dev->evbit)))	/* The device must have both rels and keys */
+		return -1;
+
+	if (!(test_bit(REL_X, dev->relbit) && test_bit(REL_Y, dev->relbit)))	/* It must be a pointer device */
+		return -1;
+	
+	if (!test_bit(BTN_LEFT, dev->keybit))				/* And have at least one mousebutton */
+		return -1;
+
+#ifdef CONFIG_INPUT_MOUSEDEV_MIX
+	{
+		struct input_handle *handle;
+
+		if (!(handle = kmalloc(sizeof(struct input_handle), GFP_KERNEL)))
+			return -1;
+
+		memset(handle, 0, sizeof(struct input_handle));
+
+		handle->dev = dev;
+		handle->handler = handler;
+		handle->private = &mousedev_single;
+
+		input_open_device(handle);
+
+		printk("mousedev.c: Adding mouse: input%d\n", dev->number);
+	}
+#else
+	{
+		struct mousedev *mousedev;
+
+		if (!(mousedev = kmalloc(sizeof(struct mousedev), GFP_KERNEL)))
+			return -1;
+
+		memset(mousedev, 0, sizeof(struct mousedev));
+
+		mousedev->misc.minor = ffz(mousedev_miscbits);
+		set_bit(mousedev->misc.minor, &mousedev_miscbits);
+		mousedev_base[mousedev->misc.minor] = mousedev;
+
+		sprintf(mousedev->name, "mousedev%d", mousedev->misc.minor);
+		mousedev->misc.name = mousedev->name;
+		mousedev->misc.minor += MOUSEDEV_MINOR_BASE;
+		mousedev->misc.fops = &mousedev_fops;
+
+		mousedev->handle.dev = dev;
+		mousedev->handle.handler = handler;
+		mousedev->handle.private = mousedev;
+
+		init_waitqueue_head(&mousedev->wait);
+
+		mousedev->used = 1;
+
+		misc_register(&mousedev->misc);
+		input_open_device(&mousedev->handle);
+
+		printk("%s: PS/2 mouse device for input%d on misc%d\n",
+			mousedev->name, dev->number, mousedev->misc.minor);
+	}
+#endif
+
+	return 0;
+}
+
+static void mousedev_disconnect(struct input_handle *handle)
+{
+#ifdef CONFIG_INPUT_MOUSEDEV_MIX
+	printk("mousedev.c: Removing mouse: input%d\n", handle->dev->number);
+	input_close_device(handle);
+	kfree(handle);
+#else
+	struct mousedev *mousedev = handle->private;
+	input_close_device(handle);
+	if (!--mousedev->used) {
+		clear_bit(mousedev->misc.minor - MOUSEDEV_MINOR_BASE, &mousedev_miscbits);
+		misc_deregister(&mousedev->misc);
+		kfree(mousedev);
+	}
+#endif
+}
+	
+static struct input_handler mousedev_handler = {
+	event:		mousedev_event,
+	connect:	mousedev_connect,
+	disconnect:	mousedev_disconnect,
+};
+
+
+#ifdef MODULE
+int init_module(void)
+#else
+int __init mousedev_init(void)
+#endif
+{
+	input_register_handler(&mousedev_handler);
+
+#ifdef CONFIG_INPUT_MOUSEDEV_MIX
+	memset(&mousedev_single, 0, sizeof(struct mousedev));
+
+	init_waitqueue_head(&mousedev_single.wait);
+	mousedev_single.misc.minor = MOUSEDEV_MINOR_BASE;
+	mousedev_single.misc.name = "mousedev";
+	mousedev_single.misc.fops = &mousedev_fops;
+
+	misc_register(&mousedev_single.misc);
+
+	printk("mousedev: PS/2 mouse device on misc%d\n", mousedev_single.misc.minor);
+#endif
+
+	return 0;
+}
+
+#ifdef MODULE
+void cleanup_module(void)
+{
+#ifdef CONFIG_INPUT_MOUSEDEV_MIX
+	misc_deregister(&mousedev_single.misc);
+#endif
+
+	input_unregister_handler(&mousedev_handler);
+}
+#endif