From 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Sat, 16 Apr 2005 15:20:36 -0700 Subject: Linux-2.6.12-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! --- drivers/input/tsdev.c | 492 ++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 492 insertions(+) create mode 100644 drivers/input/tsdev.c (limited to 'drivers/input/tsdev.c') diff --git a/drivers/input/tsdev.c b/drivers/input/tsdev.c new file mode 100644 index 000000000000..d0afba85720b --- /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 The protocol emulated by this driver + * is obsolete; for new programs use the tslib library which can read directly + * from evdev and perform dejittering, variance filtering and calibration - + * all in user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 + * 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 . + */ + +#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 +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#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 "); +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); -- cgit v1.2.3