Merge http://fbdev.bkbits.net/fbdev-2.5

into heisenberg.transvirtual.com:/tmp/fbdev-2.5

1 files changed, 443 insertions, 0 deletions

diff --git a/drivers/input/tsdev.c b/drivers/input/tsdev.c
new file mode 100644
index 000000000000..50d238711aab
--- /dev/null
+++ b/drivers/input/tsdev.c
@@ -0,0 +1,443 @@
+/*
+ * $Id: tsdev.c,v 1.15 2002/04/10 16:50:19 jsimmons Exp $
+ *
+ *  Copyright (c) 2001 "Crazy" james Simmons 
+ *
+ *  Input driver to Touchscreen device driver module.
+ *
+ *  Sponsored by Transvirtual Technology
+ */
+
+/*
+ * 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 <jsimmons@transvirtual.com>.
+ */
+
+#define TSDEV_MINOR_BASE 	128
+#define TSDEV_MINORS		32
+#define TSDEV_BUFFER_SIZE	64
+
+#include <linux/slab.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/random.h>
+#include <linux/time.h>
+
+#ifndef CONFIG_INPUT_TSDEV_SCREEN_X
+#define CONFIG_INPUT_TSDEV_SCREEN_X	240
+#endif
+#ifndef CONFIG_INPUT_TSDEV_SCREEN_Y
+#define CONFIG_INPUT_TSDEV_SCREEN_Y	320
+#endif
+
+struct tsdev {
+	int exist;
+	int open;
+	int minor;
+	char name[16];
+	wait_queue_head_t wait;
+	struct tsdev_list *list;
+	struct input_handle handle;
+	devfs_handle_t devfs;
+};
+
+/* From Compaq's Touch Screen Specification version 0.2 (draft) */
+typedef struct {
+	short pressure;
+	short x;
+	short y;
+	short millisecs;
+} TS_EVENT;
+
+struct tsdev_list {
+	struct fasync_struct *fasync;
+	struct tsdev_list *next;
+	struct tsdev *tsdev;
+	int head, tail;
+	int oldx, oldy, pendown;
+	TS_EVENT event[TSDEV_BUFFER_SIZE];
+};
+
+static struct input_handler tsdev_handler;
+
+static struct tsdev *tsdev_table[TSDEV_MINORS];
+
+static int xres = CONFIG_INPUT_TSDEV_SCREEN_X;
+static int yres = CONFIG_INPUT_TSDEV_SCREEN_Y;
+
+static int tsdev_fasync(int fd, struct file *file, int on)
+{
+	struct tsdev_list *list = file->private_data;
+	int retval;
+
+	retval = fasync_helper(fd, file, on, &list->fasync);
+	return retval < 0 ? retval : 0;
+}
+
+static int tsdev_open(struct inode *inode, struct file *file)
+{
+	int i = minor(inode->i_rdev) - TSDEV_MINOR_BASE;
+	struct tsdev_list *list;
+
+	if (i >= TSDEV_MINORS || !tsdev_table[i])
+		return -ENODEV;
+
+	if (!(list = kmalloc(sizeof(struct tsdev_list), GFP_KERNEL)))
+		return -ENOMEM;
+	memset(list, 0, sizeof(struct tsdev_list));
+
+	list->tsdev = tsdev_table[i];
+	list->next = tsdev_table[i]->list;
+	tsdev_table[i]->list = list;
+	file->private_data = list;
+
+	if (!list->tsdev->open++)
+		if (list->tsdev->exist)
+			input_open_device(&list->tsdev->handle);
+	return 0;
+}
+
+static int tsdev_release(struct inode *inode, struct file *file)
+{
+	struct tsdev_list *list = file->private_data;
+	struct tsdev_list **listptr;
+
+	listptr = &list->tsdev->list;
+	tsdev_fasync(-1, file, 0);
+
+	while (*listptr && (*listptr != list))
+		listptr = &((*listptr)->next);
+	*listptr = (*listptr)->next;
+
+	if (!--list->tsdev->open) {
+		if (list->tsdev->exist) {
+			input_close_device(&list->tsdev->handle);
+		} else {
+			input_unregister_minor(list->tsdev->devfs);
+			tsdev_table[list->tsdev->minor] = NULL;
+			kfree(list->tsdev);
+		}
+	}
+	kfree(list);
+	return 0;
+}
+
+static ssize_t tsdev_read(struct file *file, char *buffer, size_t count,
+			  loff_t * ppos)
+{
+	DECLARE_WAITQUEUE(wait, current);
+	struct tsdev_list *list = file->private_data;
+	int retval = 0;
+
+	if (list->head == list->tail) {
+		add_wait_queue(&list->tsdev->wait, &wait);
+		set_current_state(TASK_INTERRUPTIBLE);
+
+		while (list->head == list->tail) {
+			if (!list->tsdev->exist) {
+				retval = -ENODEV;
+				break;
+			}
+			if (file->f_flags & O_NONBLOCK) {
+				retval = -EAGAIN;
+				break;
+			}
+			if (signal_pending(current)) {
+				retval = -ERESTARTSYS;
+				break;
+			}
+			schedule();
+		}
+		set_current_state(TASK_RUNNING);
+		remove_wait_queue(&list->tsdev->wait, &wait);
+	}
+
+	if (retval)
+		return retval;
+
+	while (list->head != list->tail
+	       && retval + sizeof(TS_EVENT) <= count) {
+		if (copy_to_user
+		    (buffer + retval, list->event + list->tail,
+		     sizeof(TS_EVENT)))
+			return -EFAULT;
+		list->tail = (list->tail + 1) & (TSDEV_BUFFER_SIZE - 1);
+		retval += sizeof(TS_EVENT);
+	}
+	return retval;
+}
+
+/* No kernel lock - fine */
+static unsigned int tsdev_poll(struct file *file, poll_table * wait)
+{
+	struct tsdev_list *list = file->private_data;
+
+	poll_wait(file, &list->tsdev->wait, wait);
+	if (list->head != list->tail)
+		return POLLIN | POLLRDNORM;
+	return 0;
+}
+
+static int tsdev_ioctl(struct inode *inode, struct file *file,
+		       unsigned int cmd, unsigned long arg)
+{
+/*
+	struct tsdev_list *list = file->private_data;
+        struct tsdev *evdev = list->tsdev;
+        struct input_dev *dev = tsdev->handle.dev;
+        int retval;
+	
+	switch (cmd) {
+		case HHEHE:
+			return 0;
+		case hjff:
+			return 0;
+		default:
+			return 0;
+	}
+*/
+	return -EINVAL;
+}
+
+struct file_operations tsdev_fops = {
+	owner:		THIS_MODULE,
+	open:		tsdev_open,
+	release:	tsdev_release,
+	read:		tsdev_read,
+	poll:		tsdev_poll,
+	fasync:		tsdev_fasync,
+	ioctl:		tsdev_ioctl,
+};
+
+static void tsdev_event(struct input_handle *handle, unsigned int type,
+			unsigned int code, int value)
+{
+	struct tsdev *tsdev = handle->private;
+	struct tsdev_list *list = tsdev->list;
+	struct timeval time;
+	int size;
+
+	while (list) {
+		switch (type) {
+		case EV_ABS:
+			switch (code) {
+			case ABS_X:
+				if (!list->pendown)
+					return;
+
+				size =
+				    handle->dev->absmax[ABS_X] -
+				    handle->dev->absmin[ABS_X];
+				if (size > 0)
+					list->oldx =
+					    ((value -
+					      handle->dev->absmin[ABS_X]) *
+					     xres / size);
+				else
+					list->oldx =
+					    ((value -
+					      handle->dev->absmin[ABS_X]));
+				break;
+			case ABS_Y:
+				if (!list->pendown)
+					return;
+
+				size =
+				    handle->dev->absmax[ABS_Y] -
+				    handle->dev->absmin[ABS_Y];
+				if (size > 0)
+					list->oldy =
+					    ((value -
+					      handle->dev->absmin[ABS_Y]) *
+					     yres / size);
+				else
+					list->oldy =
+					    ((value -
+					      handle->dev->absmin[ABS_Y]));
+				break;
+			case ABS_PRESSURE:
+				list->pendown =
+				    ((value >
+				      handle->dev->
+				      absmin[ABS_PRESSURE])) ? value -
+				    handle->dev->absmin[ABS_PRESSURE] : 0;
+				break;
+			}
+			break;
+
+		case EV_REL:
+			switch (code) {
+			case REL_X:
+				if (!list->pendown)
+					return;
+
+				list->oldx += value;
+				if (list->oldx < 0)
+					list->oldx = 0;
+				else if (list->oldx > xres)
+					list->oldx = xres;
+				break;
+			case REL_Y:
+				if (!list->pendown)
+					return;
+
+				list->oldy += value;
+				if (list->oldy < 0)
+					list->oldy = 0;
+				else if (list->oldy > xres)
+					list->oldy = xres;
+				break;
+			}
+			break;
+
+		case EV_KEY:
+			if (code == BTN_TOUCH || code == BTN_MOUSE) {
+				switch (value) {
+				case 0:
+					list->pendown = 0;
+					break;
+				case 1:
+					if (!list->pendown)
+						list->pendown = 1;
+					break;
+				case 2:
+					return;
+				}
+			} else
+				return;
+			break;
+		}
+		do_gettimeofday(&time);
+		list->event[list->head].millisecs = time.tv_usec / 100;
+		list->event[list->head].pressure = list->pendown;
+		list->event[list->head].x = list->oldx;
+		list->event[list->head].y = list->oldy;
+		list->head = (list->head + 1) & (TSDEV_BUFFER_SIZE - 1);
+		kill_fasync(&list->fasync, SIGIO, POLL_IN);
+		list = list->next;
+	}
+	wake_up_interruptible(&tsdev->wait);
+}
+
+static struct input_handle *tsdev_connect(struct input_handler *handler,
+					  struct input_dev *dev,
+					  struct input_device_id *id)
+{
+	struct tsdev *tsdev;
+	int minor;
+
+	for (minor = 0; minor < TSDEV_MINORS && tsdev_table[minor];
+	     minor++);
+	if (minor == TSDEV_MINORS) {
+		printk(KERN_ERR
+		       "tsdev: You have way too many touchscreens\n");
+		return NULL;
+	}
+
+	if (!(tsdev = kmalloc(sizeof(struct tsdev), GFP_KERNEL)))
+		return NULL;
+	memset(tsdev, 0, sizeof(struct tsdev));
+	init_waitqueue_head(&tsdev->wait);
+
+	tsdev->minor = minor;
+	tsdev_table[minor] = tsdev;
+	sprintf(tsdev->name, "ts%d", minor);
+
+	tsdev->handle.dev = dev;
+	tsdev->handle.name = tsdev->name;
+	tsdev->handle.handler = handler;
+	tsdev->handle.private = tsdev;
+
+	tsdev->devfs =
+	    input_register_minor("ts%d", minor, TSDEV_MINOR_BASE);
+
+	tsdev->exist = 1;
+
+	return &tsdev->handle;
+}
+
+static void tsdev_disconnect(struct input_handle *handle)
+{
+	struct tsdev *tsdev = handle->private;
+
+	tsdev->exist = 0;
+
+	if (tsdev->open) {
+		input_close_device(handle);
+		wake_up_interruptible(&tsdev->wait);
+	} else {
+		input_unregister_minor(tsdev->devfs);
+		tsdev_table[tsdev->minor] = NULL;
+		kfree(tsdev);
+	}
+}
+
+static struct input_device_id tsdev_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_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 */
+
+	{},/* Terminating entry */
+};
+
+MODULE_DEVICE_TABLE(input, tsdev_ids);
+
+static struct input_handler tsdev_handler = {
+	event:		tsdev_event,
+	connect:	tsdev_connect,
+	disconnect:	tsdev_disconnect,
+	fops:		&tsdev_fops,
+	minor:		TSDEV_MINOR_BASE,
+	name:		"tsdev",
+	id_table:	tsdev_ids,
+};
+
+static int __init tsdev_init(void)
+{
+	input_register_handler(&tsdev_handler);
+	printk(KERN_INFO "ts: Compaq touchscreen protocol output\n");
+	return 0;
+}
+
+static void __exit tsdev_exit(void)
+{
+	input_unregister_handler(&tsdev_handler);
+}
+
+module_init(tsdev_init);
+module_exit(tsdev_exit);
+
+MODULE_AUTHOR("James Simmons <jsimmons@transvirtual.com>");
+MODULE_DESCRIPTION("Input driver to touchscreen converter");
+MODULE_PARM(xres, "i");
+MODULE_PARM_DESC(xres, "Horizontal screen resolution");
+MODULE_PARM(yres, "i");
+MODULE_PARM_DESC(yres, "Vertical screen resolution");