/*      $NetBSD: com_iop.c,v 1.5 2018/12/08 17:46:12 thorpej Exp $      */

/*-
* Copyright (c) 2007 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Tim Rightnour
*
* 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_iop.c,v 1.5 2018/12/08 17:46:12 thorpej Exp $");

#include <sys/param.h>
#include <sys/device.h>
#include <sys/ioctl.h>
#include <sys/tty.h>
#include <sys/bus.h>

#include <machine/intr.h>

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

#include <dev/mca/mcavar.h>
#include <dev/mca/mcadevs.h>

#include <rs6000/ioplanar/ioplanarvar.h>

struct com_iop_softc {
       struct  com_softc sc_com;       /* real com softc */
       void *sc_ih;
};

int com_iop_probe(device_t, cfdata_t , void *);
void com_iop_attach(device_t, device_t, void *);

CFATTACH_DECL_NEW(com_iop, sizeof(struct com_iop_softc),
   com_iop_probe, com_iop_attach, NULL, NULL);

#define COM_RAINBOW_FREQ        8000000

/*
* This probe is very unorthodox.  Basically, we have no way to actually
* probe the device, so instead, we check that the specific device should
* exist on the ioplanar, and just return true.
*/

int
com_iop_probe(device_t parent, cfdata_t match, void *aux)
{
       struct ioplanar_dev_attach_args *idaa = aux;

       if (idaa->idaa_devid == MCA_PRODUCT_IBM_SIO_RAINBOW &&
           (idaa->idaa_device == IOP_COM0 || idaa->idaa_device == IOP_COM1))
               return 1;

       return 0;
}

void
com_iop_attach(device_t parent, device_t self, void *aux)
{
       struct com_iop_softc *isc = device_private(self);
       struct com_softc *sc = &isc->sc_com;
       int iobase, irq;
       struct ioplanar_dev_attach_args *idaa = aux;
       bus_space_handle_t ioh;

       sc->sc_dev = self;

       switch (idaa->idaa_devid) {
       case MCA_PRODUCT_IBM_SIO_RAINBOW:
               switch (idaa->idaa_device) {
               case IOP_COM0:
                       iobase = 0x30;
                       irq = 2; /* ??? */
                       sc->sc_frequency = COM_RAINBOW_FREQ;
                       break;
               case IOP_COM1:
                       iobase = 0x38;
                       irq = 2; /* ??? */
                       sc->sc_frequency = COM_RAINBOW_FREQ;
                       break;
               default:
                       return;
               }
               break;
       default:
               return;
       }
       if (!com_is_console(idaa->idaa_iot, iobase, &ioh) &&
           bus_space_map(idaa->idaa_iot, iobase, COM_NPORTS, 0, &ioh)) {
               aprint_error(": can't map i/o space\n");
               return;
       }

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

       aprint_normal("i/o %#x-%#x irq %d", iobase, iobase + COM_NPORTS - 1,
           irq);

       com_attach_subr(sc);

       isc->sc_ih = mca_intr_establish(idaa->idaa_mc, irq, IPL_SERIAL,
           comintr, sc);

       if (isc->sc_ih == NULL) {
               aprint_error_dev(self,
                   "couldn't establish interrupt handler\n");
               return;
       }
}