/*      $NetBSD: bha_isa.c,v 1.37 2016/07/14 04:19:27 msaitoh 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: bha_isa.c,v 1.37 2016/07/14 04:19:27 msaitoh Exp $");

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

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

#include <dev/scsipi/scsipi_all.h>
#include <dev/scsipi/scsiconf.h>

#include <dev/isa/isavar.h>
#include <dev/isa/isadmavar.h>

#include <dev/ic/bhareg.h>
#include <dev/ic/bhavar.h>

#define BHA_ISA_IOSIZE  4

int     bha_isa_probe(device_t, cfdata_t, void *);
void    bha_isa_attach(device_t, device_t, void *);

CFATTACH_DECL_NEW(bha_isa, sizeof(struct bha_softc),
   bha_isa_probe, bha_isa_attach, NULL, NULL);

/*
* Check the slots looking for a board we recognise
* If we find one, note its address (slot) and call
* the actual probe routine to check it out.
*/
int
bha_isa_probe(device_t parent, cfdata_t match, void *aux)
{
       struct isa_attach_args *ia = aux;
       bus_space_tag_t iot = ia->ia_iot;
       bus_space_handle_t ioh;
       struct bha_probe_data bpd;
       int rv;

       if (ia->ia_nio < 1)
               return (0);
       if (ia->ia_nirq < 1)
               return (0);
       if (ia->ia_ndrq < 1)
               return (0);

       if (ISA_DIRECT_CONFIG(ia))
               return (0);

       /* Disallow wildcarded i/o address. */
       if (ia->ia_io[0].ir_addr == ISA_UNKNOWN_PORT)
               return (0);

       if (bus_space_map(iot, ia->ia_io[0].ir_addr, BHA_ISA_IOSIZE, 0, &ioh))
               return (0);

       rv = bha_probe_inquiry(iot, ioh, &bpd);

       bus_space_unmap(iot, ioh, BHA_ISA_IOSIZE);

       if (rv) {
               if (ia->ia_irq[0].ir_irq != ISA_UNKNOWN_IRQ &&
                   ia->ia_irq[0].ir_irq != bpd.sc_irq)
                       return (0);
               if (ia->ia_drq[0].ir_drq != ISA_UNKNOWN_DRQ &&
                   ia->ia_drq[0].ir_drq != bpd.sc_drq)
                       return (0);

               ia->ia_nio = 1;
               ia->ia_io[0].ir_size = BHA_ISA_IOSIZE;

               ia->ia_nirq = 1;
               ia->ia_irq[0].ir_irq = bpd.sc_irq;

               ia->ia_ndrq = 1;
               ia->ia_drq[0].ir_drq = bpd.sc_drq;

               ia->ia_niomem = 0;
       }
       return (rv);
}

/*
* Attach all the sub-devices we can find
*/
void
bha_isa_attach(device_t parent, device_t self, void *aux)
{
       struct isa_attach_args *ia = aux;
       struct bha_softc *sc = device_private(self);
       bus_space_tag_t iot = ia->ia_iot;
       bus_space_handle_t ioh;
       struct bha_probe_data bpd;
       isa_chipset_tag_t ic = ia->ia_ic;
       int error;

       printf("\n");

       sc->sc_dev = self;
       if (bus_space_map(iot, ia->ia_io[0].ir_addr, BHA_ISA_IOSIZE, 0, &ioh)) {
               aprint_error_dev(sc->sc_dev, "can't map i/o space\n");
               return;
       }

       sc->sc_iot = iot;
       sc->sc_ioh = ioh;
       sc->sc_dmat = ia->ia_dmat;
       if (!bha_probe_inquiry(iot, ioh, &bpd)) {
               aprint_error_dev(sc->sc_dev, "bha_isa_attach failed\n");
               return;
       }

       sc->sc_dmaflags = 0;
       if (bpd.sc_drq != -1) {
               if ((error = isa_dmacascade(ic, bpd.sc_drq)) != 0) {
                       aprint_error_dev(sc->sc_dev,
                           " unable to cascade DRQ, error = %d\n", error);
                       return;
               }
       } else {
               /*
                * We have a VLB controller.  If we're at least both
                * hardware revision E and firmware revision 3.37,
                * we can do 32-bit DMA (earlier revisions are buggy
                * in this regard).
                */
               (void) bha_info(sc);
               if (strcmp(sc->sc_firmware, "3.37") < 0)
                   printf("%s: buggy VLB controller, disabling 32-bit DMA\n",
                       device_xname(sc->sc_dev));
               else
                       sc->sc_dmaflags = ISABUS_DMA_32BIT;
       }

       sc->sc_ih = isa_intr_establish(ic, bpd.sc_irq, IST_EDGE, IPL_BIO,
           bha_intr, sc);
       if (sc->sc_ih == NULL) {
               aprint_error_dev(sc->sc_dev, "couldn't establish interrupt\n");
               return;
       }

       bha_attach(sc);
}