/*-
 * Copyright (c) 2008-2009, Volker Werth, vwe@
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 * $Id$
 */
/*
 * touch_controller.c - device specific (legacy) decoder functions
 */

#include <sys/cdefs.h>
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include "utouch.h"

/*
 * proto spec - legacy protocols:
 *
 * where T = touch-status (1=touched, 0=untouched)
 *
 * eGalax (alphatouch) SAW32PA5:
 *     Bit 7   6   5   4   3   2   1   0
 * byte 1: 1   0   0   0   0   0   0   T
 * byte 2: 0   0   0   0   x10 x9  x8  x7
 * byte 3: 0   x6  x5  x4  x3  x2  x1  x0
 * byte 4: 0   0   0   0   y10 y9  y8  y7
 * byte 5: 0   y6  y5  y4  y3  y2  y1  y0
 *
 *
 * Hampshire TShark
 *     Bit 7   6   5   4   3   2   1   0
 * byte 1: 0   0   0   0   0   0   0   T
 * byte 2: x7  x6  x5  x4  x3  x2  x1  x0
 * byte 3: 0   0   0   0   x11 x10 x9  x8
 * byte 4: y7  y6  y5  y4  y3  y2  y1  y0
 * byte 5: 0   0   0   0   y11 y10 y9  y8
 *
 *
 * Digitech DTC-01U:
 *     Bit 7   6   5   4   3   2   1   0
 * byte 1: 1   T   x11 x10 x9  x8  x7  x6
 * byte 2: 0   T   y11 y10 y9  y8  y7  y6
 * byte 3: 0   T   x5  x4  x3  x2  x1  x0
 * byte 4: 0   T   y5  y4  y3  y2  y1  y0
 *
 *
 * 3M MicroTouch
 *
 *     Bit 7   6   5   4   3   2   1   0
 * byte 1: 0   0   0   0   0   0   0   1
 * byte 2: (loop counter)
 * byte 3: 1   T   0   0   0   0   0   0
 * byte 4: compensated X 0
 * byte 5: compensated X 1
 * byte 6: compensated Y 0
 * byte 7: compensated Y 1
 * byte 8: raw X 0
 * byte 9: raw X 1
 * byte a: raw Y 0
 * byte b: raw Y 1
 *
 *
 * elotouch smartset
 *
 *
 * semtech
 *
 */


/*
 * decoder for eGalax (alphatouch) SAW32PA5
 */
uint8_t decode_alphatouch(char buf[5], utouch_coord_t * coord)
{
	if (buf == NULL || coord == NULL)
		return (1);
	//if(UT_IS_EGSAW(sc->sc_flags)) {
	if(buf[0] & _UT_EGSAWSYN) {
		if(buf[0] & _UT_EGSAWPRESS) {
			coord->pressure = _UT_PRESSURE;
			//buttons = 1;
		} else {
			coord->pressure = 0;
			//buttons = 0;
		}
		coord->x = buf[1] << 7 | buf[2];
		coord->y = buf[3] << 7 | buf[4];
		return(0);
	} else {
		if((buf[0] & _UT_EGSAWCMD) == _UT_EGSAWCMD) {
			/* command response received - what do we do now? */
			coord->x = coord->y = coord->pressure = 0;
		}
	}
	return(1);
}


uint8_t decode_tshark(char buf[5], utouch_coord_t * coord)
{
	if (buf == NULL || coord == NULL)
		return (1);
	if (buf[0] & 0x01)
		coord->pressure = _UT_PRESSURE;
	else
		coord->pressure = 0;
	coord->x = buf[2] << 8 | buf[1];
	coord->y = buf[4] << 8 | buf[3];
	return (0);
}


uint8_t decode_dtc(char buf[5], utouch_coord_t * coord)
{
	if (buf == NULL || coord == NULL)
		return (1);
	if (buf[0] & 0x80) {
		if (buf[0] & 0x40)
			coord->pressure = _UT_PRESSURE;
		else
			coord->pressure = 0;
		coord->x = buf[2] << 8 | buf[1];
		coord->y = buf[4] << 8 | buf[3];
		return (0);
	}
	return (1);
}


/* 3M MicroTouch USB EX111/121 */
uint8_t decode_3mmut_ex(char buf[11], utouch_coord_t * coord)
{
	int	i;

	if (buf == NULL || coord == NULL)
		return (1);
	if (buf[0] == 0x1 && buf[2] & 0x80) {
		for( i=0; i<11; i++)
			printf(" %02x", ((char)buf[i]&0xff));
		printf("\n");
		if (buf[2] & 0x40)
			coord->pressure = _UT_PRESSURE;
		else
			coord->pressure = 0;
		/* use raw data */
		/*
		 * according to the documentation, the raw data 
		 * is in the range of -8192 to 8192
		 * make sure, we got a positive value by adding 8192
		 */
		coord->x = (int)(buf[8] << 8 | buf[7]);
		coord->y = (int)(buf[10] << 8 | buf[9]);
		return (0);
	}
	return (1);
}