1 files changed, 758 insertions, 0 deletions

diff --git a/drivers/input/mousedev.c b/drivers/input/mousedev.c
new file mode 100644
index 00000000000..564974ce579
--- /dev/null
+++ b/drivers/input/mousedev.c
@@ -0,0 +1,758 @@
+/*
+ * Input driver to ExplorerPS/2 device driver module.
+ *
+ * Copyright (c) 1999-2002 Vojtech Pavlik
+ * Copyright (c) 2004      Dmitry Torokhov
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as published by
+ * the Free Software Foundation.
+ */
+
+#define MOUSEDEV_MINOR_BASE 	32
+#define MOUSEDEV_MINORS		32
+#define MOUSEDEV_MIX		31
+
+#include <linux/slab.h>
+#include <linux/poll.h>
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/init.h>
+#include <linux/input.h>
+#include <linux/config.h>
+#include <linux/smp_lock.h>
+#include <linux/random.h>
+#include <linux/major.h>
+#include <linux/device.h>
+#include <linux/devfs_fs_kernel.h>
+#ifdef CONFIG_INPUT_MOUSEDEV_PSAUX
+#include <linux/miscdevice.h>
+#endif
+
+MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
+MODULE_DESCRIPTION("Mouse (ExplorerPS/2) device interfaces");
+MODULE_LICENSE("GPL");
+
+#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
+
+static int xres = CONFIG_INPUT_MOUSEDEV_SCREEN_X;
+module_param(xres, uint, 0);
+MODULE_PARM_DESC(xres, "Horizontal screen resolution");
+
+static int yres = CONFIG_INPUT_MOUSEDEV_SCREEN_Y;
+module_param(yres, uint, 0);
+MODULE_PARM_DESC(yres, "Vertical screen resolution");
+
+static unsigned tap_time = 200;
+module_param(tap_time, uint, 0);
+MODULE_PARM_DESC(tap_time, "Tap time for touchpads in absolute mode (msecs)");
+
+struct mousedev_hw_data {
+	int dx, dy, dz;
+	int x, y;
+	int abs_event;
+	unsigned long buttons;
+};
+
+struct mousedev {
+	int exist;
+	int open;
+	int minor;
+	char name[16];
+	wait_queue_head_t wait;
+	struct list_head list;
+	struct input_handle handle;
+
+	struct mousedev_hw_data packet;
+	unsigned int pkt_count;
+	int old_x[4], old_y[4];
+	int frac_dx, frac_dy;
+	unsigned long touch;
+};
+
+enum mousedev_emul {
+	MOUSEDEV_EMUL_PS2,
+	MOUSEDEV_EMUL_IMPS,
+	MOUSEDEV_EMUL_EXPS
+};
+
+struct mousedev_motion {
+	int dx, dy, dz;
+	unsigned long buttons;
+};
+
+#define PACKET_QUEUE_LEN	16
+struct mousedev_list {
+	struct fasync_struct *fasync;
+	struct mousedev *mousedev;
+	struct list_head node;
+
+	struct mousedev_motion packets[PACKET_QUEUE_LEN];
+	unsigned int head, tail;
+	spinlock_t packet_lock;
+	int pos_x, pos_y;
+
+	signed char ps2[6];
+	unsigned char ready, buffer, bufsiz;
+	unsigned char imexseq, impsseq;
+	enum mousedev_emul mode;
+};
+
+#define MOUSEDEV_SEQ_LEN	6
+
+static unsigned char mousedev_imps_seq[] = { 0xf3, 200, 0xf3, 100, 0xf3, 80 };
+static unsigned char mousedev_imex_seq[] = { 0xf3, 200, 0xf3, 200, 0xf3, 80 };
+
+static struct input_handler mousedev_handler;
+
+static struct mousedev *mousedev_table[MOUSEDEV_MINORS];
+static struct mousedev mousedev_mix;
+
+#define fx(i)  (mousedev->old_x[(mousedev->pkt_count - (i)) & 03])
+#define fy(i)  (mousedev->old_y[(mousedev->pkt_count - (i)) & 03])
+
+static void mousedev_touchpad_event(struct input_dev *dev, struct mousedev *mousedev, unsigned int code, int value)
+{
+	int size, tmp;
+	enum { FRACTION_DENOM = 128 };
+
+	if (mousedev->touch) {
+		size = dev->absmax[ABS_X] - dev->absmin[ABS_X];
+		if (size == 0) size = 256 * 2;
+		switch (code) {
+			case ABS_X:
+				fx(0) = value;
+				if (mousedev->pkt_count >= 2) {
+					tmp = ((value - fx(2)) * (256 * FRACTION_DENOM)) / size;
+					tmp += mousedev->frac_dx;
+					mousedev->packet.dx = tmp / FRACTION_DENOM;
+					mousedev->frac_dx = tmp - mousedev->packet.dx * FRACTION_DENOM;
+				}
+				break;
+
+			case ABS_Y:
+				fy(0) = value;
+				if (mousedev->pkt_count >= 2) {
+					tmp = -((value - fy(2)) * (256 * FRACTION_DENOM)) / size;
+					tmp += mousedev->frac_dy;
+					mousedev->packet.dy = tmp / FRACTION_DENOM;
+					mousedev->frac_dy = tmp - mousedev->packet.dy * FRACTION_DENOM;
+				}
+				break;
+		}
+	}
+}
+
+static void mousedev_abs_event(struct input_dev *dev, struct mousedev *mousedev, unsigned int code, int value)
+{
+	int size;
+
+	switch (code) {
+		case ABS_X:
+			size = dev->absmax[ABS_X] - dev->absmin[ABS_X];
+			if (size == 0) size = xres;
+			if (value > dev->absmax[ABS_X]) value = dev->absmax[ABS_X];
+			if (value < dev->absmin[ABS_X]) value = dev->absmin[ABS_X];
+			mousedev->packet.x = ((value - dev->absmin[ABS_X]) * xres) / size;
+			mousedev->packet.abs_event = 1;
+			break;
+
+		case ABS_Y:
+			size = dev->absmax[ABS_Y] - dev->absmin[ABS_Y];
+			if (size == 0) size = yres;
+			if (value > dev->absmax[ABS_Y]) value = dev->absmax[ABS_Y];
+			if (value < dev->absmin[ABS_Y]) value = dev->absmin[ABS_Y];
+			mousedev->packet.y = yres - ((value - dev->absmin[ABS_Y]) * yres) / size;
+			mousedev->packet.abs_event = 1;
+			break;
+	}
+}
+
+static void mousedev_rel_event(struct mousedev *mousedev, unsigned int code, int value)
+{
+	switch (code) {
+		case REL_X:	mousedev->packet.dx += value; break;
+		case REL_Y:	mousedev->packet.dy -= value; break;
+		case REL_WHEEL:	mousedev->packet.dz -= value; break;
+	}
+}
+
+static void mousedev_key_event(struct mousedev *mousedev, unsigned int code, int value)
+{
+	int index;
+
+	switch (code) {
+		case BTN_TOUCH:
+		case BTN_0:
+		case BTN_FORWARD:
+		case BTN_LEFT:		index = 0; break;
+		case BTN_STYLUS:
+		case BTN_1:
+		case BTN_RIGHT:		index = 1; break;
+		case BTN_2:
+		case BTN_STYLUS2:
+		case BTN_MIDDLE:	index = 2; break;
+		case BTN_3:
+		case BTN_BACK:
+		case BTN_SIDE:		index = 3; break;
+		case BTN_4:
+		case BTN_EXTRA:		index = 4; break;
+		default: 		return;
+	}
+
+	if (value) {
+		set_bit(index, &mousedev->packet.buttons);
+		set_bit(index, &mousedev_mix.packet.buttons);
+	} else {
+		clear_bit(index, &mousedev->packet.buttons);
+		clear_bit(index, &mousedev_mix.packet.buttons);
+	}
+}
+
+static void mousedev_notify_readers(struct mousedev *mousedev, struct mousedev_hw_data *packet)
+{
+	struct mousedev_list *list;
+	struct mousedev_motion *p;
+	unsigned long flags;
+
+	list_for_each_entry(list, &mousedev->list, node) {
+		spin_lock_irqsave(&list->packet_lock, flags);
+
+		p = &list->packets[list->head];
+		if (list->ready && p->buttons != packet->buttons) {
+			unsigned int new_head = (list->head + 1) % PACKET_QUEUE_LEN;
+			if (new_head != list->tail) {
+				p = &list->packets[list->head = new_head];
+				memset(p, 0, sizeof(struct mousedev_motion));
+			}
+		}
+
+		if (packet->abs_event) {
+			p->dx += packet->x - list->pos_x;
+			p->dy += packet->y - list->pos_y;
+			list->pos_x = packet->x;
+			list->pos_y = packet->y;
+		}
+
+		list->pos_x += packet->dx;
+		list->pos_x = list->pos_x < 0 ? 0 : (list->pos_x >= xres ? xres : list->pos_x);
+		list->pos_y += packet->dy;
+		list->pos_y = list->pos_y < 0 ? 0 : (list->pos_y >= yres ? yres : list->pos_y);
+
+		p->dx += packet->dx;
+		p->dy += packet->dy;
+		p->dz += packet->dz;
+		p->buttons = mousedev->packet.buttons;
+
+		list->ready = 1;
+
+		spin_unlock_irqrestore(&list->packet_lock, flags);
+		kill_fasync(&list->fasync, SIGIO, POLL_IN);
+	}
+
+	wake_up_interruptible(&mousedev->wait);
+}
+
+static void mousedev_touchpad_touch(struct mousedev *mousedev, int value)
+{
+	if (!value) {
+		if (mousedev->touch &&
+		    time_before(jiffies, mousedev->touch + msecs_to_jiffies(tap_time))) {
+			/*
+			 * Toggle left button to emulate tap.
+			 * We rely on the fact that mousedev_mix always has 0
+			 * motion packet so we won't mess current position.
+			 */
+			set_bit(0, &mousedev->packet.buttons);
+			set_bit(0, &mousedev_mix.packet.buttons);
+			mousedev_notify_readers(mousedev, &mousedev_mix.packet);
+			mousedev_notify_readers(&mousedev_mix, &mousedev_mix.packet);
+			clear_bit(0, &mousedev->packet.buttons);
+			clear_bit(0, &mousedev_mix.packet.buttons);
+		}
+		mousedev->touch = mousedev->pkt_count = 0;
+		mousedev->frac_dx = 0;
+		mousedev->frac_dy = 0;
+	}
+	else
+		if (!mousedev->touch)
+			mousedev->touch = jiffies;
+}
+
+static void mousedev_event(struct input_handle *handle, unsigned int type, unsigned int code, int value)
+{
+	struct mousedev *mousedev = handle->private;
+
+	switch (type) {
+		case EV_ABS:
+			/* Ignore joysticks */
+			if (test_bit(BTN_TRIGGER, handle->dev->keybit))
+				return;
+
+			if (test_bit(BTN_TOOL_FINGER, handle->dev->keybit))
+				mousedev_touchpad_event(handle->dev, mousedev, code, value);
+			else
+				mousedev_abs_event(handle->dev, mousedev, code, value);
+
+			break;
+
+		case EV_REL:
+			mousedev_rel_event(mousedev, code, value);
+			break;
+
+		case EV_KEY:
+			if (value != 2) {
+				if (code == BTN_TOUCH && test_bit(BTN_TOOL_FINGER, handle->dev->keybit))
+					mousedev_touchpad_touch(mousedev, value);
+				else
+					mousedev_key_event(mousedev, code, value);
+			}
+			break;
+
+		case EV_SYN:
+			if (code == SYN_REPORT) {
+				if (mousedev->touch) {
+					mousedev->pkt_count++;
+					/* Input system eats duplicate events, but we need all of them
+					 * to do correct averaging so apply present one forward
+			 		 */
+					fx(0) = fx(1);
+					fy(0) = fy(1);
+				}
+
+				mousedev_notify_readers(mousedev, &mousedev->packet);
+				mousedev_notify_readers(&mousedev_mix, &mousedev->packet);
+
+				mousedev->packet.dx = mousedev->packet.dy = mousedev->packet.dz = 0;
+				mousedev->packet.abs_event = 0;
+			}
+			break;
+	}
+}
+
+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 void mousedev_free(struct mousedev *mousedev)
+{
+	mousedev_table[mousedev->minor] = NULL;
+	kfree(mousedev);
+}
+
+static int mixdev_release(void)
+{
+	struct input_handle *handle;
+
+	list_for_each_entry(handle, &mousedev_handler.h_list, h_node) {
+		struct mousedev *mousedev = handle->private;
+
+		if (!mousedev->open) {
+			if (mousedev->exist)
+				input_close_device(&mousedev->handle);
+			else
+				mousedev_free(mousedev);
+		}
+	}
+
+	return 0;
+}
+
+static int mousedev_release(struct inode * inode, struct file * file)
+{
+	struct mousedev_list *list = file->private_data;
+
+	mousedev_fasync(-1, file, 0);
+
+	list_del(&list->node);
+
+	if (!--list->mousedev->open) {
+		if (list->mousedev->minor == MOUSEDEV_MIX)
+			return mixdev_release();
+
+		if (!mousedev_mix.open) {
+			if (list->mousedev->exist)
+				input_close_device(&list->mousedev->handle);
+			else
+				mousedev_free(list->mousedev);
+		}
+	}
+
+	kfree(list);
+	return 0;
+}
+
+static int mousedev_open(struct inode * inode, struct file * file)
+{
+	struct mousedev_list *list;
+	struct input_handle *handle;
+	struct mousedev *mousedev;
+	int i;
+
+#ifdef CONFIG_INPUT_MOUSEDEV_PSAUX
+	if (imajor(inode) == MISC_MAJOR)
+		i = MOUSEDEV_MIX;
+	else
+#endif
+		i = iminor(inode) - 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));
+
+	spin_lock_init(&list->packet_lock);
+	list->pos_x = xres / 2;
+	list->pos_y = yres / 2;
+	list->mousedev = mousedev_table[i];
+	list_add_tail(&list->node, &mousedev_table[i]->list);
+	file->private_data = list;
+
+	if (!list->mousedev->open++) {
+		if (list->mousedev->minor == MOUSEDEV_MIX) {
+			list_for_each_entry(handle, &mousedev_handler.h_list, h_node) {
+				mousedev = handle->private;
+				if (!mousedev->open && mousedev->exist)
+					input_open_device(handle);
+			}
+		} else
+			if (!mousedev_mix.open && list->mousedev->exist)
+				input_open_device(&list->mousedev->handle);
+	}
+
+	return 0;
+}
+
+static inline int mousedev_limit_delta(int delta, int limit)
+{
+	return delta > limit ? limit : (delta < -limit ? -limit : delta);
+}
+
+static void mousedev_packet(struct mousedev_list *list, signed char *ps2_data)
+{
+	struct mousedev_motion *p;
+	unsigned long flags;
+
+	spin_lock_irqsave(&list->packet_lock, flags);
+	p = &list->packets[list->tail];
+
+	ps2_data[0] = 0x08 | ((p->dx < 0) << 4) | ((p->dy < 0) << 5) | (p->buttons & 0x07);
+	ps2_data[1] = mousedev_limit_delta(p->dx, 127);
+	ps2_data[2] = mousedev_limit_delta(p->dy, 127);
+	p->dx -= ps2_data[1];
+	p->dy -= ps2_data[2];
+
+	switch (list->mode) {
+		case MOUSEDEV_EMUL_EXPS:
+			ps2_data[3] = mousedev_limit_delta(p->dz, 7);
+			p->dz -= ps2_data[3];
+			ps2_data[3] = (ps2_data[3] & 0x0f) | ((p->buttons & 0x18) << 1);
+			list->bufsiz = 4;
+			break;
+
+		case MOUSEDEV_EMUL_IMPS:
+			ps2_data[0] |= ((p->buttons & 0x10) >> 3) | ((p->buttons & 0x08) >> 1);
+			ps2_data[3] = mousedev_limit_delta(p->dz, 127);
+			p->dz -= ps2_data[3];
+			list->bufsiz = 4;
+			break;
+
+		case MOUSEDEV_EMUL_PS2:
+		default:
+			ps2_data[0] |= ((p->buttons & 0x10) >> 3) | ((p->buttons & 0x08) >> 1);
+			p->dz = 0;
+			list->bufsiz = 3;
+			break;
+	}
+
+	if (!p->dx && !p->dy && !p->dz) {
+		if (list->tail == list->head)
+			list->ready = 0;
+		else
+			list->tail = (list->tail + 1) % PACKET_QUEUE_LEN;
+	}
+
+	spin_unlock_irqrestore(&list->packet_lock, flags);
+}
+
+
+static ssize_t mousedev_write(struct file * file, const char __user * buffer, size_t count, loff_t *ppos)
+{
+	struct mousedev_list *list = file->private_data;
+	unsigned char c;
+	unsigned int i;
+
+	for (i = 0; i < count; i++) {
+
+		if (get_user(c, buffer + i))
+			return -EFAULT;
+
+		if (c == mousedev_imex_seq[list->imexseq]) {
+			if (++list->imexseq == MOUSEDEV_SEQ_LEN) {
+				list->imexseq = 0;
+				list->mode = MOUSEDEV_EMUL_EXPS;
+			}
+		} else list->imexseq = 0;
+
+		if (c == mousedev_imps_seq[list->impsseq]) {
+			if (++list->impsseq == MOUSEDEV_SEQ_LEN) {
+				list->impsseq = 0;
+				list->mode = MOUSEDEV_EMUL_IMPS;
+			}
+		} else list->impsseq = 0;
+
+		list->ps2[0] = 0xfa;
+
+		switch (c) {
+
+			case 0xeb: /* Poll */
+				mousedev_packet(list, &list->ps2[1]);
+				list->bufsiz++; /* account for leading ACK */
+				break;
+
+			case 0xf2: /* Get ID */
+				switch (list->mode) {
+					case MOUSEDEV_EMUL_PS2:  list->ps2[1] = 0; break;
+					case MOUSEDEV_EMUL_IMPS: list->ps2[1] = 3; break;
+					case MOUSEDEV_EMUL_EXPS: list->ps2[1] = 4; break;
+				}
+				list->bufsiz = 2;
+				break;
+
+			case 0xe9: /* Get info */
+				list->ps2[1] = 0x60; list->ps2[2] = 3; list->ps2[3] = 200;
+				list->bufsiz = 4;
+				break;
+
+			case 0xff: /* Reset */
+				list->impsseq = list->imexseq = 0;
+				list->mode = MOUSEDEV_EMUL_PS2;
+				list->ps2[1] = 0xaa; list->ps2[2] = 0x00;
+				list->bufsiz = 3;
+				break;
+
+			default:
+				list->bufsiz = 1;
+				break;
+		}
+
+		list->buffer = list->bufsiz;
+	}
+
+	kill_fasync(&list->fasync, SIGIO, POLL_IN);
+
+	wake_up_interruptible(&list->mousedev->wait);
+
+	return count;
+}
+
+static ssize_t mousedev_read(struct file * file, char __user * buffer, size_t count, loff_t *ppos)
+{
+	struct mousedev_list *list = file->private_data;
+	int retval = 0;
+
+	if (!list->ready && !list->buffer && (file->f_flags & O_NONBLOCK))
+		return -EAGAIN;
+
+	retval = wait_event_interruptible(list->mousedev->wait,
+					  !list->mousedev->exist || list->ready || list->buffer);
+
+	if (retval)
+		return retval;
+
+	if (!list->mousedev->exist)
+		return -ENODEV;
+
+	if (!list->buffer && list->ready) {
+		mousedev_packet(list, list->ps2);
+		list->buffer = list->bufsiz;
+	}
+
+	if (count > list->buffer)
+		count = list->buffer;
+
+	list->buffer -= count;
+
+	if (copy_to_user(buffer, list->ps2 + list->bufsiz - list->buffer - count, count))
+		return -EFAULT;
+
+	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);
+	return ((list->ready || list->buffer) ? (POLLIN | POLLRDNORM) : 0) |
+		(list->mousedev->exist ? 0 : (POLLHUP | POLLERR));
+}
+
+static struct file_operations mousedev_fops = {
+	.owner =	THIS_MODULE,
+	.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 input_device_id *id)
+{
+	struct mousedev *mousedev;
+	int minor = 0;
+
+	for (minor = 0; minor < MOUSEDEV_MINORS && mousedev_table[minor]; minor++);
+	if (minor == MOUSEDEV_MINORS) {
+		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_LIST_HEAD(&mousedev->list);
+	init_waitqueue_head(&mousedev->wait);
+
+	mousedev->minor = minor;
+	mousedev->exist = 1;
+	mousedev->handle.dev = dev;
+	mousedev->handle.name = mousedev->name;
+	mousedev->handle.handler = handler;
+	mousedev->handle.private = mousedev;
+	sprintf(mousedev->name, "mouse%d", minor);
+
+	if (mousedev_mix.open)
+		input_open_device(&mousedev->handle);
+
+	mousedev_table[minor] = mousedev;
+
+	devfs_mk_cdev(MKDEV(INPUT_MAJOR, MOUSEDEV_MINOR_BASE + minor),
+			S_IFCHR|S_IRUGO|S_IWUSR, "input/mouse%d", minor);
+	class_simple_device_add(input_class,
+				MKDEV(INPUT_MAJOR, MOUSEDEV_MINOR_BASE + minor),
+				dev->dev, "mouse%d", minor);
+
+	return &mousedev->handle;
+}
+
+static void mousedev_disconnect(struct input_handle *handle)
+{
+	struct mousedev *mousedev = handle->private;
+	struct mousedev_list *list;
+
+	class_simple_device_remove(MKDEV(INPUT_MAJOR, MOUSEDEV_MINOR_BASE + mousedev->minor));
+	devfs_remove("input/mouse%d", mousedev->minor);
+	mousedev->exist = 0;
+
+	if (mousedev->open) {
+		input_close_device(handle);
+		wake_up_interruptible(&mousedev->wait);
+		list_for_each_entry(list, &mousedev->list, node)
+			kill_fasync(&list->fasync, SIGIO, POLL_HUP);
+	} else {
+		if (mousedev_mix.open)
+			input_close_device(handle);
+		mousedev_free(mousedev);
+	}
+}
+
+static struct input_device_id mousedev_ids[] = {
+	{
+		.flags = INPUT_DEVICE_ID_MATCH_EVBIT | INPUT_DEVICE_ID_MATCH_KEYBIT | INPUT_DEVICE_ID_MATCH_RELBIT,
+		.evbit = { BIT(EV_KEY) | BIT(EV_REL) },
+		.keybit = { [LONG(BTN_LEFT)] = BIT(BTN_LEFT) },
+		.relbit = { BIT(REL_X) | BIT(REL_Y) },
+	},	/* A mouse like device, at least one button, two relative axes */
+	{
+		.flags = INPUT_DEVICE_ID_MATCH_EVBIT | INPUT_DEVICE_ID_MATCH_RELBIT,
+		.evbit = { BIT(EV_KEY) | BIT(EV_REL) },
+		.relbit = { BIT(REL_WHEEL) },
+	},	/* A separate scrollwheel */
+	{
+		.flags = INPUT_DEVICE_ID_MATCH_EVBIT | INPUT_DEVICE_ID_MATCH_KEYBIT | INPUT_DEVICE_ID_MATCH_ABSBIT,
+		.evbit = { BIT(EV_KEY) | BIT(EV_ABS) },
+		.keybit = { [LONG(BTN_TOUCH)] = BIT(BTN_TOUCH) },
+		.absbit = { BIT(ABS_X) | BIT(ABS_Y) },
+	},	/* A tablet like device, at least touch detection, two absolute axes */
+	{
+		.flags = INPUT_DEVICE_ID_MATCH_EVBIT | INPUT_DEVICE_ID_MATCH_KEYBIT | INPUT_DEVICE_ID_MATCH_ABSBIT,
+		.evbit = { BIT(EV_KEY) | BIT(EV_ABS) },
+		.keybit = { [LONG(BTN_TOOL_FINGER)] = BIT(BTN_TOOL_FINGER) },
+		.absbit = { BIT(ABS_X) | BIT(ABS_Y) | BIT(ABS_PRESSURE) | BIT(ABS_TOOL_WIDTH) },
+	},	/* A touchpad */
+
+	{ }, 	/* Terminating entry */
+};
+
+MODULE_DEVICE_TABLE(input, mousedev_ids);
+
+static struct input_handler mousedev_handler = {
+	.event =	mousedev_event,
+	.connect =	mousedev_connect,
+	.disconnect =	mousedev_disconnect,
+	.fops =		&mousedev_fops,
+	.minor =	MOUSEDEV_MINOR_BASE,
+	.name =		"mousedev",
+	.id_table =	mousedev_ids,
+};
+
+#ifdef CONFIG_INPUT_MOUSEDEV_PSAUX
+static struct miscdevice psaux_mouse = {
+	PSMOUSE_MINOR, "psaux", &mousedev_fops
+};
+static int psaux_registered;
+#endif
+
+static int __init mousedev_init(void)
+{
+	input_register_handler(&mousedev_handler);
+
+	memset(&mousedev_mix, 0, sizeof(struct mousedev));
+	INIT_LIST_HEAD(&mousedev_mix.list);
+	init_waitqueue_head(&mousedev_mix.wait);
+	mousedev_table[MOUSEDEV_MIX] = &mousedev_mix;
+	mousedev_mix.exist = 1;
+	mousedev_mix.minor = MOUSEDEV_MIX;
+
+	devfs_mk_cdev(MKDEV(INPUT_MAJOR, MOUSEDEV_MINOR_BASE + MOUSEDEV_MIX),
+			S_IFCHR|S_IRUGO|S_IWUSR, "input/mice");
+	class_simple_device_add(input_class, MKDEV(INPUT_MAJOR, MOUSEDEV_MINOR_BASE + MOUSEDEV_MIX),
+				NULL, "mice");
+
+#ifdef CONFIG_INPUT_MOUSEDEV_PSAUX
+	if (!(psaux_registered = !misc_register(&psaux_mouse)))
+		printk(KERN_WARNING "mice: could not misc_register the device\n");
+#endif
+
+	printk(KERN_INFO "mice: PS/2 mouse device common for all mice\n");
+
+	return 0;
+}
+
+static void __exit mousedev_exit(void)
+{
+#ifdef CONFIG_INPUT_MOUSEDEV_PSAUX
+	if (psaux_registered)
+		misc_deregister(&psaux_mouse);
+#endif
+	devfs_remove("input/mice");
+	class_simple_device_remove(MKDEV(INPUT_MAJOR, MOUSEDEV_MINOR_BASE + MOUSEDEV_MIX));
+	input_unregister_handler(&mousedev_handler);
+}
+
+module_init(mousedev_init);
+module_exit(mousedev_exit);