patch-2.2.18 linux/drivers/usb/mousedev.c

• Lines: 490
• Date: Sat Oct 28 15:48:19 2000
• Orig file: v2.2.17/drivers/usb/mousedev.c
• Orig date: Thu Jan 1 01:00:00 1970

diff -u --new-file --recursive --exclude-from /usr/src/exclude v2.2.17/drivers/usb/mousedev.c linux/drivers/usb/mousedev.c
@@ -0,0 +1,489 @@
+/*
+ * $Id: mousedev.c,v 1.15 2000/08/14 21:05:26 vojtech Exp $
+ *
+ *  Copyright (c) 1999-2000 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 <vojtech@suse.cz>, or by paper mail:
+ * Vojtech Pavlik, Ucitelska 1576, Prague 8, 182 00 Czech Republic
+ */
+
+#define MOUSEDEV_MINOR_BASE 	32
+#define MOUSEDEV_MINORS		32
+#define MOUSEDEV_MIX		31
+
+#include <linux/malloc.h>
+#include <linux/poll.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/input.h>
+#include <linux/config.h>
+#include <linux/smp_lock.h>
+#include <linux/kcomp.h>
+
+#ifndef CONFIG_INPUT_MOUSEDEV_SCREEN_X
+#define CONFIG_INPUT_MOUSEDEV_SCREEN_X	1024
+#endif
+#ifndef CONFIG_INPUT_MOUSEDEV_SCREEN_Y
+#define CONFIG_INPUT_MOUSEDEV_SCREEN_Y	768
+#endif
+
+struct mousedev {
+	int exist;
+	int open;
+	int minor;
+	wait_queue_head_t wait;
+	struct mousedev_list *list;
+	struct input_handle handle;
+	devfs_handle_t devfs;
+};
+
+struct mousedev_list {
+	struct fasync_struct *fasync;
+	struct mousedev *mousedev;
+	struct mousedev_list *next;
+	int dx, dy, dz, oldx, oldy;
+	signed char ps2[6];
+	unsigned long 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 };
+
+static struct input_handler mousedev_handler;
+
+static struct mousedev *mousedev_table[MOUSEDEV_MINORS];
+static struct mousedev mousedev_mix;
+
+static void mousedev_event(struct input_handle *handle, unsigned int type, unsigned int code, int value)
+{
+	struct mousedev *mousedevs[3] = { handle->private, &mousedev_mix, NULL };
+	struct mousedev **mousedev = mousedevs;
+	struct mousedev_list *list;
+	int index, size;
+
+	while (*mousedev) {
+		list = (*mousedev)->list;
+		while (list) {
+			switch (type) {
+				case EV_ABS:
+					if (test_bit(BTN_TRIGGER, handle->dev->keybit))
+						break;
+					switch (code) {
+						case ABS_X:	
+							size = handle->dev->absmax[ABS_X] - handle->dev->absmin[ABS_X];
+							list->dx += (value * CONFIG_INPUT_MOUSEDEV_SCREEN_X - list->oldx) / size;
+							list->oldx += list->dx * size;
+							break;
+						case ABS_Y:
+							size = handle->dev->absmax[ABS_Y] - handle->dev->absmin[ABS_Y];
+							list->dy -= (value * CONFIG_INPUT_MOUSEDEV_SCREEN_Y - list->oldy) / size;
+							list->oldy -= list->dy * size;
+							break;
+					}
+					break;
+
+				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_0:
+						case BTN_TOUCH:
+						case BTN_LEFT:   index = 0; break;
+						case BTN_4:
+						case BTN_EXTRA:  if (list->mode > 1) { index = 4; break; }
+						case BTN_STYLUS:
+						case BTN_1:
+						case BTN_RIGHT:  index = 1; break;
+						case BTN_3:
+						case BTN_SIDE:   if (list->mode > 1) { index = 3; break; }
+						case BTN_2:
+						case BTN_STYLUS2:
+						case BTN_MIDDLE: index = 2; break;	
+						default: return;
+					}
+					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;
+
+			kill_fasync(list->fasync, SIGIO);
+
+			list = list->next;
+		}
+
+		wake_up_interruptible(&((*mousedev)->wait));
+		mousedev++;
+	}
+}
+
+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;
+
+	lock_kernel();
+	listptr = &list->mousedev->list;
+	mousedev_fasync(-1, file, 0);
+
+	while (*listptr && (*listptr != list))
+		listptr = &((*listptr)->next);
+	*listptr = (*listptr)->next;
+
+	if (!--list->mousedev->open) {
+		if (list->mousedev->minor == MOUSEDEV_MIX) {
+			struct input_handle *handle = mousedev_handler.handle;
+			while (handle) {
+				struct mousedev *mousedev = handle->private;
+				if (!mousedev->open) {
+					if (mousedev->exist) {
+						input_close_device(&mousedev->handle);
+					} else {
+						input_unregister_minor(mousedev->devfs);
+						mousedev_table[mousedev->minor] = NULL;
+						kfree(mousedev);
+					}
+				}
+				handle = handle->hnext;
+			}
+		} else {
+			if (!mousedev_mix.open) {
+				if (list->mousedev->exist) {
+					input_close_device(&list->mousedev->handle);
+				} else {
+					input_unregister_minor(list->mousedev->devfs);
+					mousedev_table[list->mousedev->minor] = NULL;
+					kfree(list->mousedev);
+				}
+			}
+		}
+	}
+	
+	kfree(list);
+	unlock_kernel();
+
+	return 0;
+}
+
+static int mousedev_open(struct inode * inode, struct file * file)
+{
+	struct mousedev_list *list;
+	int i = MINOR(inode->i_rdev) - MOUSEDEV_MINOR_BASE;
+
+	if (i > MOUSEDEV_MINORS || !mousedev_table[i])
+		return -ENODEV;
+
+	if (!(list = kmalloc(sizeof(struct mousedev_list), GFP_KERNEL)))
+		return -ENOMEM;
+	memset(list, 0, sizeof(struct mousedev_list));
+
+	list->mousedev = mousedev_table[i];
+	list->next = mousedev_table[i]->list;
+	mousedev_table[i]->list = list;
+	file->private_data = list;
+
+	if (!list->mousedev->open++) {
+		if (list->mousedev->minor == MOUSEDEV_MIX) {
+			struct input_handle *handle = mousedev_handler.handle;
+			while (handle) {
+				struct mousedev *mousedev = handle->private;
+				if (!mousedev->open)
+					if (mousedev->exist)	
+						input_open_device(handle);
+				handle = handle->hnext;
+			}
+		} else {
+			if (!mousedev_mix.open)
+				if (list->mousedev->exist)	
+					input_open_device(&list->mousedev->handle);
+		}
+	}
+
+	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->ps2[off + 1];
+	list->dy -= list->ps2[off + 2];
+	list->bufsiz = off + 3;
+
+	if (list->mode > 1)
+		list->ps2[off] |= ((list->buttons & 0x18) << 3);
+	
+	if (list->mode) {
+		list->ps2[off + 3] = (list->dz > 127 ? 127 : (list->dz < -127 ? -127 : list->dz));
+		list->bufsiz++;
+		list->dz -= list->ps2[off + 3];
+	}
+	if (!list->dx && !list->dy && (!list->mode || !list->dz)) 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++) {
+
+		get_user(c, buffer+i);
+
+		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;
+	}
+
+	kill_fasync(list->fasync, SIGIO);
+
+	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;	
+}
+
+/* No kernel lock - fine */
+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 struct input_handle *mousedev_connect(struct input_handler *handler, struct input_dev *dev)
+{
+	struct mousedev *mousedev;
+	int minor = 0;
+
+	if (!test_bit(EV_KEY, dev->evbit) ||
+	   (!test_bit(BTN_LEFT, dev->keybit) && !test_bit(BTN_TOUCH, dev->keybit)))
+		return NULL;
+
+	if ((!test_bit(EV_REL, dev->evbit) || !test_bit(REL_X, dev->relbit)) &&
+	    (!test_bit(EV_ABS, dev->evbit) || !test_bit(ABS_X, dev->absbit)))
+		return NULL;
+
+	for (minor = 0; minor < MOUSEDEV_MINORS && mousedev_table[minor]; minor++);
+	if (mousedev_table[minor]) {
+		printk(KERN_ERR "mousedev: no more free mousedev devices\n");
+		return NULL;
+	}
+
+	if (!(mousedev = kmalloc(sizeof(struct mousedev), GFP_KERNEL)))
+		return NULL;
+	memset(mousedev, 0, sizeof(struct mousedev));
+	init_waitqueue_head(&mousedev->wait);
+
+	mousedev->exist = 1;
+	mousedev->minor = minor;
+	mousedev_table[minor] = mousedev;
+
+	mousedev->handle.dev = dev;
+	mousedev->handle.handler = handler;
+	mousedev->handle.private = mousedev;
+
+	mousedev->devfs = input_register_minor("mouse%d", minor, MOUSEDEV_MINOR_BASE);
+
+	if (mousedev_mix.open)
+		input_open_device(&mousedev->handle);
+
+	printk(KERN_INFO "mouse%d: PS/2 mouse device for input%d\n", minor, dev->number);
+
+	return &mousedev->handle;
+}
+
+static void mousedev_disconnect(struct input_handle *handle)
+{
+	struct mousedev *mousedev = handle->private;
+
+	mousedev->exist = 0;
+
+	if (mousedev->open) {
+		input_close_device(handle);
+	} else {
+		if (mousedev_mix.open)
+			input_close_device(handle);
+		input_unregister_minor(mousedev->devfs);
+		mousedev_table[mousedev->minor] = NULL;
+		kfree(mousedev);
+	}
+}
+	
+static struct input_handler mousedev_handler = {
+	event:		mousedev_event,
+	connect:	mousedev_connect,
+	disconnect:	mousedev_disconnect,
+	fops:		&mousedev_fops,
+	minor:		MOUSEDEV_MINOR_BASE,
+};
+
+static int __init mousedev_init(void)
+{
+	input_register_handler(&mousedev_handler);
+
+	memset(&mousedev_mix, 0, sizeof(struct mousedev));
+	init_waitqueue_head(&mousedev_mix.wait);
+	mousedev_table[MOUSEDEV_MIX] = &mousedev_mix;
+	mousedev_mix.exist = 1;
+	mousedev_mix.minor = MOUSEDEV_MIX;
+	mousedev_mix.devfs = input_register_minor("mice", MOUSEDEV_MIX, MOUSEDEV_MINOR_BASE);
+
+	printk(KERN_INFO "mice: PS/2 mouse device common for all mice\n");
+
+	return 0;
+}
+
+static void __exit mousedev_exit(void)
+{
+	input_unregister_minor(mousedev_mix.devfs);
+	input_unregister_handler(&mousedev_handler);
+}
+
+module_init(mousedev_init);
+module_exit(mousedev_exit);
+
+MODULE_AUTHOR("Vojtech Pavlik <vojtech@suse.cz>");
+MODULE_DESCRIPTION("Input driver to PS/2 or ImPS/2 device driver");