/* $NetBSD: vsxxx.c,v 1.11 2009/03/14 21:04:19 dsl Exp $ */

/*-
 * Copyright (c) 1999 The NetBSD Foundation, Inc.
 * All rights reserved.
 *
 * This code is derived from software contributed to The NetBSD Foundation
 * by Tohru Nishimura.
 *
 * 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
 */

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: vsxxx.c,v 1.11 2009/03/14 21:04:19 dsl Exp $");

/*
 * Common machinary for VSXXX mice and tablet
 */

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/device.h>

#include <dev/wscons/wsconsio.h>
#include <dev/wscons/wsmousevar.h>

#include <dev/dec/vsxxxvar.h>

/*
 * XXX XXX XXX
 *
 * collect various mice and tablet parameters/protocol design
 * and establish vsxxx.h
 *
 * XXX XXX XXX
 */
#define	VS_SELFTEST	'T'
#define	VS_INCREMENTAL	'R'
#define	VS_PROMPTING	'D'
#define	VS_REQ_POSITION	'P'

#define	VS_MOUSE_REPSZ	3
#define	VS_TABLET_REPSZ	5

/* first octet */
#define	VS_START_FRAME	0x80
#define	VS_R_BUTTON	0x01
#define	VS_M_BUTTON	0x02
#define	VS_L_BUTTON	0x04
#define	VS_Y_SIGN	0x08
#define	VS_X_SIGN	0x10

/* low order 4 bit of the second octet in a SELFTEST reply */
#define	VS_MOUSE	0x2
#define	VS_TABLET	0x4

extern struct cfdriver vsms_cd;

static int  vsxxx_enable(void *);
static int  vsxxx_ioctl(void *, u_long, void *, int, struct proc *);
static void vsxxx_disable(void *);

struct wsmouse_accessops vsxxx_accessops = {	/* EXPORT */
	vsxxx_enable,				/* MD? */
	vsxxx_ioctl,
	vsxxx_disable,				/* MD? */
};

static int
vsxxx_enable(void *v)
{
	/* turn on the hardware? */
	((struct vsxxx_softc *)v)->sc_nbyte = 0;
	return 0;
}

static void
vsxxx_disable(void *v)
{
	/* turn off the hardware? */
}

/*ARGUSED*/
static int
vsxxx_ioctl(void *v, u_long cmd, void *data, int flag, struct proc *p)
{
	if (cmd == WSMOUSEIO_GTYPE) {
		*(u_int *)data = WSMOUSE_TYPE_VSXXX;
		return 0;
	}
	return EPASSTHROUGH;
}

/* EXPORT */ void
vsxxx_input(int data)
{
	struct vsxxx_softc *sc = device_lookup_private(&vsms_cd, 0);
	int x, y;

	if (data & VS_START_FRAME)
		sc->sc_nbyte = 0;

	sc->sc_report.raw[sc->sc_nbyte++] = data;

	if (sc->sc_nbyte < VS_MOUSE_REPSZ)
		return;
	sc->sc_nbyte = 0;

	x = sc->sc_report.ms.xpos;
	y = sc->sc_report.ms.ypos;
	if ((sc->sc_report.raw[0] & VS_X_SIGN) == 0)
		x = -x;
	if ((sc->sc_report.raw[0] & VS_Y_SIGN) != 0)
		y = -y;					/* Eeeh? */
	wsmouse_input(sc->sc_wsmousedev,
			sc->sc_report.raw[0] & 07,
			x, y, 0, 0,
			WSMOUSE_INPUT_DELTA);
}