/*      $NetBSD: com_dio.c,v 1.10 2024/01/16 05:48:28 thorpej Exp $     */

/*-
* Copyright (c) 1998 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Charles M. Hannum.
*
* 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.
*/

/*-
* Copyright (c) 1991 The Regents of the University of California.
* 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. 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.
*
*      @(#)com.c       7.5 (Berkeley) 5/16/91
*/

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: com_dio.c,v 1.10 2024/01/16 05:48:28 thorpej Exp $");

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

#include <machine/bus.h>

#include <dev/ic/comreg.h>
#include <dev/ic/comvar.h>

#include <hp300/dev/diovar.h>
#include <hp300/dev/diodevs.h>
#include <hp300/dev/com_dioreg.h>
#include <hp300/dev/com_diovar.h>

struct com_dio_softc {
       struct  com_softc sc_com;       /* real "com" softc */

       /* DIO-specific goo. */
       struct  bus_space_tag sc_tag;   /* device specific bus space tag */
       void    *sc_ih;                 /* interrupt handler */
};

static int      com_dio_match(device_t, cfdata_t , void *);
static void     com_dio_attach(device_t, device_t, void *);

CFATTACH_DECL_NEW(com_dio, sizeof(struct com_dio_softc),
   com_dio_match, com_dio_attach, NULL, NULL);

static int com_dio_speed = TTYDEF_SPEED;
static struct bus_space_tag comcntag;

#define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */

static int
com_dio_match(device_t parent, cfdata_t match, void *aux)
{
       struct dio_attach_args *da = aux;

       switch (da->da_id) {
       case DIO_DEVICE_ID_DCA0:
       case DIO_DEVICE_ID_DCA0REM:
       case DIO_DEVICE_ID_DCA1:
       case DIO_DEVICE_ID_DCA1REM:
               return 1;
       }

       return 0;
}

static void
com_dio_attach(device_t parent, device_t self, void *aux)
{
       struct com_dio_softc *dsc = device_private(self);
       struct com_softc *sc = &dsc->sc_com;
       bus_space_tag_t iot;
       bus_space_handle_t iohdca, iohcom;
       struct dio_attach_args *da = aux;
       int isconsole;

       sc->sc_dev = self;
       isconsole = com_is_console(&comcntag, da->da_addr + DCA_COM_OFFSET,
           &iohcom);

       if (isconsole) {
               iot = &comcntag;
               bus_space_unmap(iot, iohcom, COM_NPORTS);
       } else {
               iot = &dsc->sc_tag;
               memcpy(iot, da->da_bst, sizeof(struct bus_space_tag));
               dio_set_bus_space_oddbyte(iot);
       }

       if (bus_space_map(iot, da->da_addr, DCA_SIZE, 0, &iohdca) ||
           bus_space_subregion(iot, iohdca, DCA_COM_OFFSET,
           COM_NPORTS << 1, &iohcom)) {
               aprint_error(": can't map i/o space\n");
               return;
       }

       if (!isconsole) {
               bus_space_write_1(iot, iohdca, DCA_RESET, 0xff);
               DELAY(1000);
       }

       com_init_regs(&sc->sc_regs, iot, iohcom,
           da->da_addr + DCA_COM_OFFSET);

       sc->sc_frequency = COM_DIO_FREQ;

       com_attach_subr(sc);

       dsc->sc_ih = dio_intr_establish(comintr, sc, da->da_ipl, ISRPRI_TTY);

       /* Enable interrupts. */
       bus_space_write_1(iot, iohdca, DCA_IC, IC_IE);
}

int
com_dio_cnattach(bus_space_tag_t bst, bus_addr_t addr, int scode)
{
       bus_space_tag_t iot = &comcntag;
       bus_space_handle_t iohdca;
       uint8_t id;

       memcpy(iot, bst, sizeof(struct bus_space_tag));
       dio_set_bus_space_oddbyte(iot);

       if (bus_space_map(iot, addr, DCA_SIZE, 0, &iohdca))
               return 1;
       bus_space_write_1(iot, iohdca, DCA_RESET, 0xff);
       DELAY(100);
       bus_space_write_1(iot, iohdca, DCA_IC, IC_IE);

       id = bus_space_read_1(iot, iohdca, DCA_ID);
       bus_space_unmap(iot, iohdca, DCA_SIZE);

       switch (id) {
#ifdef CONSCODE
       case DCAID0:
       case DCAID1:
#endif
       case DCAREMID0:
       case DCAREMID1:
               break;
       default:
               return 1;
       }

       comcnattach(iot, addr + DCA_COM_OFFSET, com_dio_speed, COM_DIO_FREQ,
           COM_TYPE_NORMAL, CONMODE);

       return 0;
}

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