Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 492 insertions, 0 deletions

diff --git a/drivers/input/tsdev.c b/drivers/input/tsdev.c
new file mode 100644
index 0000000..d0afba8
--- /dev/null
+++ b/drivers/input/tsdev.c
@@ -0,0 +1,492 @@
+/*
+ * $Id: tsdev.c,v 1.15 2002/04/10 16:50:19 jsimmons Exp $
+ *
+ *  Copyright (c) 2001 "Crazy" james Simmons
+ *
+ *  Compaq touchscreen protocol driver. The protocol emulated by this driver
+ *  is obsolete; for new programs use the tslib library which can read directly
+ *  from evdev and perform dejittering, variance filtering and calibration -
+ *  all in user space, not at kernel level. The meaning of this driver is
+ *  to allow usage of newer input drivers with old applications that use the
+ *  old /dev/h3600_ts and /dev/h3600_tsraw devices.
+ *
+ *  09-Apr-2004: Andrew Zabolotny <zap@homelink.ru>
+ *      Fixed to actually work, not just output random numbers.
+ *      Added support for both h3600_ts and h3600_tsraw protocol
+ *      emulation.
+ */
+
+/*
+ * 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@infradead.org>.
+ */
+
+#define TSDEV_MINOR_BASE 	128
+#define TSDEV_MINORS		32
+/* First 16 devices are h3600_ts compatible; second 16 are h3600_tsraw */
+#define TSDEV_MINOR_MASK	15
+#define TSDEV_BUFFER_SIZE	64
+
+#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/major.h>
+#include <linux/config.h>
+#include <linux/smp_lock.h>
+#include <linux/random.h>
+#include <linux/time.h>
+#include <linux/device.h>
+#include <linux/devfs_fs_kernel.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
+
+/* This driver emulates both protocols of the old h3600_ts and h3600_tsraw
+ * devices. The first one must output X/Y data in 'cooked' format, e.g.
+ * filtered, dejittered and calibrated. Second device just outputs raw
+ * data received from the hardware.
+ *
+ * This driver doesn't support filtering and dejittering; it supports only
+ * calibration. Filtering and dejittering must be done in the low-level
+ * driver, if needed, because it may gain additional benefits from knowing
+ * the low-level details, the nature of noise and so on.
+ *
+ * The driver precomputes a calibration matrix given the initial xres and
+ * yres values (quite innacurate for most touchscreens) that will result
+ * in a more or less expected range of output values. The driver supports
+ * the TS_SET_CAL ioctl, which will replace the calibration matrix with a
+ * new one, supposedly generated from the values taken from the raw device.
+ */
+
+MODULE_AUTHOR("James Simmons <jsimmons@transvirtual.com>");
+MODULE_DESCRIPTION("Input driver to touchscreen converter");
+MODULE_LICENSE("GPL");
+
+static int xres = CONFIG_INPUT_TSDEV_SCREEN_X;
+module_param(xres, uint, 0);
+MODULE_PARM_DESC(xres, "Horizontal screen resolution (can be negative for X-mirror)");
+
+static int yres = CONFIG_INPUT_TSDEV_SCREEN_Y;
+module_param(yres, uint, 0);
+MODULE_PARM_DESC(yres, "Vertical screen resolution (can be negative for Y-mirror)");
+
+/* From Compaq's Touch Screen Specification version 0.2 (draft) */
+struct ts_event {
+	short pressure;
+	short x;
+	short y;
+	short millisecs;
+};
+
+struct ts_calibration {
+	int xscale;
+	int xtrans;
+	int yscale;
+	int ytrans;
+	int xyswap;
+};
+
+struct tsdev {
+	int exist;
+	int open;
+	int minor;
+	char name[8];
+	wait_queue_head_t wait;
+	struct list_head list;
+	struct input_handle handle;
+	int x, y, pressure;
+	struct ts_calibration cal;
+};
+
+struct tsdev_list {
+	struct fasync_struct *fasync;
+	struct list_head node;
+	struct tsdev *tsdev;
+	int head, tail;
+	struct ts_event event[TSDEV_BUFFER_SIZE];
+	int raw;
+};
+
+/* The following ioctl codes are defined ONLY for backward compatibility.
+ * Don't use tsdev for new developement; use the tslib library instead.
+ * Touchscreen calibration is a fully userspace task.
+ */
+/* Use 'f' as magic number */
+#define IOC_H3600_TS_MAGIC  'f'
+#define TS_GET_CAL	_IOR(IOC_H3600_TS_MAGIC, 10, struct ts_calibration)
+#define TS_SET_CAL	_IOW(IOC_H3600_TS_MAGIC, 11, struct ts_calibration)
+
+static struct input_handler tsdev_handler;
+
+static struct tsdev *tsdev_table[TSDEV_MINORS/2];
+
+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 = iminor(inode) - TSDEV_MINOR_BASE;
+	struct tsdev_list *list;
+
+	if (i >= TSDEV_MINORS || !tsdev_table[i & TSDEV_MINOR_MASK])
+		return -ENODEV;
+
+	if (!(list = kmalloc(sizeof(struct tsdev_list), GFP_KERNEL)))
+		return -ENOMEM;
+	memset(list, 0, sizeof(struct tsdev_list));
+
+	list->raw = (i >= TSDEV_MINORS/2) ? 1 : 0;
+
+	i &= TSDEV_MINOR_MASK;
+	list->tsdev = tsdev_table[i];
+	list_add_tail(&list->node, &tsdev_table[i]->list);
+	file->private_data = list;
+
+	if (!list->tsdev->open++)
+		if (list->tsdev->exist)
+			input_open_device(&list->tsdev->handle);
+	return 0;
+}
+
+static void tsdev_free(struct tsdev *tsdev)
+{
+	tsdev_table[tsdev->minor] = NULL;
+	kfree(tsdev);
+}
+
+static int tsdev_release(struct inode *inode, struct file *file)
+{
+	struct tsdev_list *list = file->private_data;
+
+	tsdev_fasync(-1, file, 0);
+	list_del(&list->node);
+
+	if (!--list->tsdev->open) {
+		if (list->tsdev->exist)
+			input_close_device(&list->tsdev->handle);
+		else
+			tsdev_free(list->tsdev);
+	}
+	kfree(list);
+	return 0;
+}
+
+static ssize_t tsdev_read(struct file *file, char __user *buffer, size_t count,
+			  loff_t * ppos)
+{
+	struct tsdev_list *list = file->private_data;
+	int retval = 0;
+
+	if (list->head == list->tail && list->tsdev->exist && (file->f_flags & O_NONBLOCK))
+		return -EAGAIN;
+
+	retval = wait_event_interruptible(list->tsdev->wait,
+			list->head != list->tail || !list->tsdev->exist);
+
+	if (retval)
+		return retval;
+
+	if (!list->tsdev->exist)
+		return -ENODEV;
+
+	while (list->head != list->tail &&
+	       retval + sizeof (struct ts_event) <= count) {
+		if (copy_to_user (buffer + retval, list->event + list->tail,
+				  sizeof (struct ts_event)))
+			return -EFAULT;
+		list->tail = (list->tail + 1) & (TSDEV_BUFFER_SIZE - 1);
+		retval += sizeof (struct 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);
+	return ((list->head == list->tail) ? 0 : (POLLIN | POLLRDNORM)) |
+		(list->tsdev->exist ? 0 : (POLLHUP | POLLERR));
+}
+
+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 *tsdev = list->tsdev;
+	int retval = 0;
+
+	switch (cmd) {
+	case TS_GET_CAL:
+		if (copy_to_user ((void __user *)arg, &tsdev->cal,
+				  sizeof (struct ts_calibration)))
+			retval = -EFAULT;
+		break;
+	case TS_SET_CAL:
+		if (copy_from_user (&tsdev->cal, (void __user *)arg,
+				    sizeof (struct ts_calibration)))
+			retval = -EFAULT;
+		break;
+	default:
+		retval = -EINVAL;
+		break;
+	}
+
+	return retval;
+}
+
+static 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;
+	struct timeval time;
+
+	switch (type) {
+	case EV_ABS:
+		switch (code) {
+		case ABS_X:
+			tsdev->x = value;
+			break;
+		case ABS_Y:
+			tsdev->y = value;
+			break;
+		case ABS_PRESSURE:
+			if (value > handle->dev->absmax[ABS_PRESSURE])
+				value = handle->dev->absmax[ABS_PRESSURE];
+			value -= handle->dev->absmin[ABS_PRESSURE];
+			if (value < 0)
+				value = 0;
+			tsdev->pressure = value;
+			break;
+		}
+		break;
+
+	case EV_REL:
+		switch (code) {
+		case REL_X:
+			tsdev->x += value;
+			if (tsdev->x < 0)
+				tsdev->x = 0;
+			else if (tsdev->x > xres)
+				tsdev->x = xres;
+			break;
+		case REL_Y:
+			tsdev->y += value;
+			if (tsdev->y < 0)
+				tsdev->y = 0;
+			else if (tsdev->y > yres)
+				tsdev->y = yres;
+			break;
+		}
+		break;
+
+	case EV_KEY:
+		if (code == BTN_TOUCH || code == BTN_MOUSE) {
+			switch (value) {
+			case 0:
+				tsdev->pressure = 0;
+				break;
+			case 1:
+				if (!tsdev->pressure)
+					tsdev->pressure = 1;
+				break;
+			}
+		}
+		break;
+	}
+
+	if (type != EV_SYN || code != SYN_REPORT)
+		return;
+
+	list_for_each_entry(list, &tsdev->list, node) {
+		int x, y, tmp;
+
+		do_gettimeofday(&time);
+		list->event[list->head].millisecs = time.tv_usec / 100;
+		list->event[list->head].pressure = tsdev->pressure;
+
+		x = tsdev->x;
+		y = tsdev->y;
+
+		/* Calibration */
+		if (!list->raw) {
+			x = ((x * tsdev->cal.xscale) >> 8) + tsdev->cal.xtrans;
+			y = ((y * tsdev->cal.yscale) >> 8) + tsdev->cal.ytrans;
+			if (tsdev->cal.xyswap) {
+				tmp = x; x = y; y = tmp;
+			}
+		}
+
+		list->event[list->head].x = x;
+		list->event[list->head].y = y;
+		list->head = (list->head + 1) & (TSDEV_BUFFER_SIZE - 1);
+		kill_fasync(&list->fasync, SIGIO, POLL_IN);
+	}
+	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, delta;
+
+	for (minor = 0; minor < TSDEV_MINORS/2 && tsdev_table[minor];
+	     minor++);
+	if (minor >= TSDEV_MINORS/2) {
+		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_LIST_HEAD(&tsdev->list);
+	init_waitqueue_head(&tsdev->wait);
+
+	sprintf(tsdev->name, "ts%d", minor);
+
+	tsdev->exist = 1;
+	tsdev->minor = minor;
+	tsdev->handle.dev = dev;
+	tsdev->handle.name = tsdev->name;
+	tsdev->handle.handler = handler;
+	tsdev->handle.private = tsdev;
+
+	/* Precompute the rough calibration matrix */
+	delta = dev->absmax [ABS_X] - dev->absmin [ABS_X] + 1;
+	if (delta == 0)
+		delta = 1;
+	tsdev->cal.xscale = (xres << 8) / delta;
+	tsdev->cal.xtrans = - ((dev->absmin [ABS_X] * tsdev->cal.xscale) >> 8);
+
+	delta = dev->absmax [ABS_Y] - dev->absmin [ABS_Y] + 1;
+	if (delta == 0)
+		delta = 1;
+	tsdev->cal.yscale = (yres << 8) / delta;
+	tsdev->cal.ytrans = - ((dev->absmin [ABS_Y] * tsdev->cal.yscale) >> 8);
+
+	tsdev_table[minor] = tsdev;
+
+	devfs_mk_cdev(MKDEV(INPUT_MAJOR, TSDEV_MINOR_BASE + minor),
+			S_IFCHR|S_IRUGO|S_IWUSR, "input/ts%d", minor);
+	devfs_mk_cdev(MKDEV(INPUT_MAJOR, TSDEV_MINOR_BASE + minor + TSDEV_MINORS/2),
+			S_IFCHR|S_IRUGO|S_IWUSR, "input/tsraw%d", minor);
+	class_simple_device_add(input_class,
+				MKDEV(INPUT_MAJOR, TSDEV_MINOR_BASE + minor),
+				dev->dev, "ts%d", minor);
+
+	return &tsdev->handle;
+}
+
+static void tsdev_disconnect(struct input_handle *handle)
+{
+	struct tsdev *tsdev = handle->private;
+	struct tsdev_list *list;
+
+	class_simple_device_remove(MKDEV(INPUT_MAJOR, TSDEV_MINOR_BASE + tsdev->minor));
+	devfs_remove("input/ts%d", tsdev->minor);
+	devfs_remove("input/tsraw%d", tsdev->minor);
+	tsdev->exist = 0;
+
+	if (tsdev->open) {
+		input_close_device(handle);
+		wake_up_interruptible(&tsdev->wait);
+		list_for_each_entry(list, &tsdev->list, node)
+			kill_fasync(&list->fasync, SIGIO, POLL_HUP);
+	} else
+		tsdev_free(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 */
+
+	{
+	      .flags	= INPUT_DEVICE_ID_MATCH_EVBIT | INPUT_DEVICE_ID_MATCH_ABSBIT,
+	      .evbit	= { BIT(EV_ABS) },
+	      .absbit	= { BIT(ABS_X) | BIT(ABS_Y) | BIT(ABS_PRESSURE) },
+	 },/* A tablet like device with several gradations of pressure */
+
+	{},/* 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);