/*      $NetBSD: ms_hb.c,v 1.16 2021/08/07 16:19:01 thorpej Exp $       */

/*-
* Copyright (c) 2000 Tsubai Masanari.  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.
* 3. The name of the author may not be used to endorse or promote products
*    derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 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: ms_hb.c,v 1.16 2021/08/07 16:19:01 thorpej Exp $");

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

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

#include <machine/adrsmap.h>

#include <newsmips/dev/hbvar.h>

struct msreg {
       volatile uint8_t ms_data;
       volatile uint8_t ms_stat;
       volatile uint8_t ms_reset;
       volatile uint8_t ms_init;
};

struct ms_hb_softc {
       device_t sc_dev;
       struct msreg *sc_reg;
       device_t sc_wsmousedev;
       int sc_ndata;
       uint8_t sc_buf[3];
};

int ms_hb_match(device_t, cfdata_t, void *);
void ms_hb_attach(device_t, device_t, void *);
int ms_hb_intr(void *);

int ms_hb_enable(void *);
int ms_hb_ioctl(void *, u_long, void *, int, struct lwp *);
void ms_hb_disable(void *);

CFATTACH_DECL_NEW(ms_hb, sizeof(struct ms_hb_softc),
   ms_hb_match, ms_hb_attach, NULL, NULL);

struct wsmouse_accessops ms_hb_accessops = {
       ms_hb_enable,
       ms_hb_ioctl,
       ms_hb_disable
};

int
ms_hb_match(device_t parent, cfdata_t cf, void *aux)
{
       struct hb_attach_args *ha = aux;

       if (strcmp(ha->ha_name, "ms") == 0)
               return 1;

       return 0;
}

void
ms_hb_attach(device_t parent, device_t self, void *aux)
{
       struct ms_hb_softc *sc = device_private(self);
       struct hb_attach_args *ha = aux;
       struct msreg *reg;
       struct wsmousedev_attach_args aa;
       int intr;

       sc->sc_dev = self;

       reg = (struct msreg *)ha->ha_addr;
       intr = ha->ha_level;

       if (intr == -1)
               intr = 2;

       sc->sc_reg = reg;

       reg->ms_reset = 0x01;
       reg->ms_init = 0x80;    /* 1200 bps */

       aprint_normal(" level %d\n", intr);

       hb_intr_establish(intr, INTEN0_MSINT, IPL_TTY, ms_hb_intr, sc);

       aa.accessops = &ms_hb_accessops;
       aa.accesscookie = sc;
       sc->sc_wsmousedev = config_found(self, &aa, wsmousedevprint, CFARGS_NONE);
}

int
ms_hb_intr(void *v)
{
       struct ms_hb_softc *sc = v;
       struct msreg *reg = sc->sc_reg;
       volatile uint8_t *ien = (void *)INTEN0;
       int code, index, byte0, byte1, byte2;
       int button, dx, dy;
       int rv = 0;

       *ien &= ~RX_MSINTE;

       while (reg->ms_stat & RX_MSRDY) {
               rv = 1;
               code = reg->ms_data;
               index = sc->sc_ndata;

               if (sc->sc_wsmousedev == NULL)
                       continue;

               if (code & 0x80) {
                       sc->sc_buf[0] = code;
                       sc->sc_ndata = 1;
                       continue;
               }

               if (index == 1) {
                       sc->sc_buf[1] = code;
                       sc->sc_ndata++;
                       continue;
               }

               if (index == 2) {
                       sc->sc_buf[2] = code;
                       sc->sc_ndata++;

                       byte0 = sc->sc_buf[0];
                       byte1 = sc->sc_buf[1];
                       byte2 = sc->sc_buf[2];

                       button = 0;
                       if (byte0 & 0x01)
                               button |= 1;
                       if (byte0 & 0x04)
                               button |= 2;
                       if (byte0 & 0x02)
                               button |= 4;

                       if (byte0 & 0x08)
                               dx = byte1 - 0x80;
                       else
                               dx = byte1;
                       if (byte0 & 0x10)
                               dy = byte2 - 0x80;
                       else
                               dy = byte2;

                       wsmouse_input(sc->sc_wsmousedev,
                                       button,
                                       dx, -dy, 0, 0,
                                       WSMOUSE_INPUT_DELTA);
               }
       }

       *ien |= RX_MSINTE;
       return rv;
}

int
ms_hb_enable(void *v)
{
       volatile uint8_t *ien = (void *)INTEN0;

       *ien |= RX_MSINTE;
       return 0;
}

void
ms_hb_disable(void *v)
{
       volatile uint8_t *ien = (void *)INTEN0;

       *ien &= ~RX_MSINTE;
}

int
ms_hb_ioctl(void *v, u_long cmd, void *data, int flag, struct lwp *l)
{

       return EPASSTHROUGH;
}