/*      $NetBSD: com_ebus.c,v 1.17 2018/12/08 17:46:13 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.
*/

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: com_ebus.c,v 1.17 2018/12/08 17:46:13 thorpej Exp $");

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

#include <sys/bus.h>
#include <machine/autoconf.h>
#include <machine/intr.h>

#include <dev/ebus/ebusreg.h>
#include <dev/ebus/ebusvar.h>

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

struct com_ebus_softc {
       struct com_softc ebsc_com;      /* real "com" softc */

       /* this space for rent */
};

static int com_ebus_match(device_t, cfdata_t , void *);
static void com_ebus_attach(device_t, device_t, void *);

CFATTACH_DECL_NEW(com_ebus, sizeof(struct com_ebus_softc),
   com_ebus_match, com_ebus_attach, NULL, NULL);

static int
com_ebus_match(device_t parent, cfdata_t cf, void *aux)
{
       struct ebus_attach_args *ea = aux;
       bus_space_handle_t ioh;
       int match;

       if (strcmp(ea->ea_name, "su") != 0)
               return (0);

       match = 0;
       if (bus_space_map(ea->ea_bustag, EBUS_ADDR_FROM_REG(&ea->ea_reg[0]),
                         ea->ea_reg[0].size, 0, &ioh) == 0)
       {
               match = comprobe1(ea->ea_bustag, ioh);
               bus_space_unmap(ea->ea_bustag, ioh, ea->ea_reg[0].size);
       }

       return (match);
}

static void
com_ebus_attach(device_t parent, device_t self, void *aux)
{
       struct com_ebus_softc *ebsc = device_private(self);
       struct com_softc *sc = &ebsc->ebsc_com;
       struct ebus_attach_args *ea = aux;
       bus_space_tag_t iot;
       bus_space_handle_t ioh;
       bus_addr_t iobase;

       sc->sc_dev = self;
       iot = ea->ea_bustag;
       iobase = EBUS_ADDR_FROM_REG(&ea->ea_reg[0]);
       sc->sc_frequency = COM_FREQ;
       sc->sc_hwflags = COM_HW_NO_TXPRELOAD;

       /*
        * XXX: It would be nice to be able to split console input and
        * output to different devices.  For now switch to serial
        * console if PROM stdin is on serial (so that we can use DDB).
        */
       if (prom_instance_to_package(prom_stdin()) == ea->ea_node)
               comcnattach(iot, iobase, B9600, sc->sc_frequency,
                   COM_TYPE_NORMAL, (CLOCAL | CREAD | CS8));

       if (!com_is_console(iot, iobase, &ioh)
           && bus_space_map(iot, iobase, ea->ea_reg[0].size,
                            0, &ioh) != 0)
       {
               aprint_error(": unable to map device registers\n");
               return;
       }

       com_init_regs(&sc->sc_regs, iot, ioh, iobase);

       com_attach_subr(sc);

       if (ea->ea_nintr != 0)
               (void)bus_intr_establish(iot, ea->ea_intr[0], IPL_SERIAL,
                                        comintr, sc);
}