/*      $NetBSD: qvms.c,v 1.3 2021/08/07 16:19:07 thorpej Exp $ */

/* Copyright (c) 2015 Charles H. Dickman. All rights reserved.
 * Derived from dzms.c
 *
 * Copyright (c) 1992, 1993
 *      The Regents of the University of California.  All rights reserved.
 *
 * This software was developed by the Computer Systems Engineering group
 * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
 * contributed to Berkeley.
 *
 * All advertising materials mentioning features or use of this software
 * must display the following acknowledgement:
 *      This product includes software developed by the University of
 *      California, Lawrence Berkeley Laboratory.
 *
 * 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.
 * 3. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
 *
 *      @(#)ms.c        8.1 (Berkeley) 6/11/93
 */

/*
 * VSXXX mice attached to line 1 of the QVSS
 */

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: qvms.c,v 1.3 2021/08/07 16:19:07 thorpej Exp $");

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/device.h>
#include <sys/ioctl.h>
#include <sys/syslog.h>
#include <sys/kernel.h>
#include <sys/proc.h>
#include <sys/tty.h>

#include <sys/bus.h>

#include <vax/uba/qvareg.h>
#include <vax/uba/qvavar.h>
#include <vax/uba/qvkbdvar.h>
#include <dev/dec/lk201.h>

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

#include "locators.h"

struct qvms_softc {             /* driver status information */
        struct  device qvms_dev;        /* required first: base device */
        struct  qvaux_linestate *qvms_ls;

        int sc_enabled;         /* input enabled? */
        int sc_selftest;

        int inputstate;
        u_int buttons;
        int dx, dy;

        device_t sc_wsmousedev;
};

static int  qvms_match(device_t, cfdata_t, void *);
static void qvms_attach(device_t, device_t, void *);
static int qvms_input(void *, int);

CFATTACH_DECL_NEW(qvms, sizeof(struct qvms_softc),
    qvms_match, qvms_attach, NULL, NULL);

static int  qvms_enable(void *);
static int  qvms_ioctl(void *, u_long, void *, int, struct lwp *);
static void qvms_disable(void *);

const struct wsmouse_accessops qvms_accessops = {
        qvms_enable,
        qvms_ioctl,
        qvms_disable,
};

static int
qvms_match(device_t parent, cfdata_t cf, void *aux)
{
        struct qvauxkm_attach_args *daa = aux;

        /* Exact match is better than wildcard. */
        if (cf->cf_loc[QVAUXCF_LINE] == daa->daa_line)
                return 2;

        /* This driver accepts wildcard. */
        if (cf->cf_loc[QVAUXCF_LINE] == QVAUXCF_LINE_DEFAULT)
                return 1;

        return 0;
}

static void
qvms_attach(device_t parent, device_t self, void *aux)
{
        struct qvaux_softc *qvaux = device_private(parent);
        struct qvms_softc *qvms = device_private(self);
        struct qvauxkm_attach_args *daa = aux;
        struct qvaux_linestate *ls;
        struct wsmousedev_attach_args a;

        qvaux->sc_qvaux[daa->daa_line].qvaux_catch = qvms_input;
        qvaux->sc_qvaux[daa->daa_line].qvaux_private = qvms;
        ls = &qvaux->sc_qvaux[daa->daa_line];
        qvms->qvms_ls = ls;

        printf("\n");

        a.accessops = &qvms_accessops;
        a.accesscookie = qvms;

        qvms->sc_enabled = 0;
        qvms->sc_selftest = 0;
        qvms->sc_wsmousedev = config_found(self, &a, wsmousedevprint,
            CFARGS_NONE);
}

static int
qvms_enable(void *v)
{
        struct qvms_softc *sc = v;

        if (sc->sc_enabled)
                return EBUSY;

        sc->sc_selftest = 4; /* wait for 4 byte reply upto 1/2 sec */
        qvauxputc(sc->qvms_ls, MOUSE_SELF_TEST);
        (void)tsleep(qvms_enable, TTIPRI, "qvmsopen", hz / 2);
        if (sc->sc_selftest != 0) {
                sc->sc_selftest = 0;
                return ENXIO;
        }
        DELAY(150);
        qvauxputc(sc->qvms_ls, MOUSE_INCREMENTAL);
        sc->sc_enabled = 1;
        sc->inputstate = 0;
        return 0;
}

static void
qvms_disable(void *v)
{
        struct qvms_softc *sc = v;

        sc->sc_enabled = 0;
}

static int
qvms_ioctl(void *v, u_long cmd, void *data, int flag, struct lwp *l)
{
        if (cmd == WSMOUSEIO_GTYPE) {
                *(u_int *)data = WSMOUSE_TYPE_VSXXX;
                return 0;
        }
        return EPASSTHROUGH;
}

static int
qvms_input(void *vsc, int data)
{
        struct qvms_softc *sc = vsc;

        if (sc->sc_enabled == 0) {
                if (sc->sc_selftest > 0) {
                        sc->sc_selftest -= 1;
                        if (sc->sc_selftest == 0)
                                wakeup(qvms_enable);
                }
                return (1);
        }

#define WSMS_BUTTON1    0x01
#define WSMS_BUTTON2    0x02
#define WSMS_BUTTON3    0x04

        if ((data & MOUSE_START_FRAME) != 0)
                sc->inputstate = 1;
        else
                sc->inputstate++;

        if (sc->inputstate == 1) {
                sc->buttons = 0;
                if ((data & LEFT_BUTTON) != 0)
                        sc->buttons |= WSMS_BUTTON1;
                if ((data & MIDDLE_BUTTON) != 0)
                        sc->buttons |= WSMS_BUTTON2;
                if ((data & RIGHT_BUTTON) != 0)
                        sc->buttons |= WSMS_BUTTON3;

                sc->dx = data & MOUSE_X_SIGN;
                sc->dy = data & MOUSE_Y_SIGN;
        } else if (sc->inputstate == 2) {
                if (sc->dx == 0)
                        sc->dx = -data;
                else
                        sc->dx = data;
        } else if (sc->inputstate == 3) {
                sc->inputstate = 0;
                if (sc->dy == 0)
                        sc->dy = -data;
                else
                        sc->dy = data;
                wsmouse_input(sc->sc_wsmousedev,
                                sc->buttons,
                                sc->dx, sc->dy, 0, 0,
                                WSMOUSE_INPUT_DELTA);
        }

        return(1);
}