/*      $NetBSD: fdcisa.c,v 1.16 2023/01/06 10:28:28 tsutsui 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) 1990 The Regents of the University of California.
* All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Don Ahn.
*
* 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.
*
*      @(#)fd.c        7.4 (Berkeley) 5/25/91
*/

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: fdcisa.c,v 1.16 2023/01/06 10:28:28 tsutsui Exp $");

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

#include <sys/bus.h>

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

#include <atari/atari/device.h>


/* controller driver configuration */
static int      fdc_isa_probe (device_t, cfdata_t, void *);
static void     fdc_isa_attach (device_t, device_t, void *);

struct fdc_isa_softc {
       struct fdc_softc        sc_fdc;         /* base fdc device */
       bus_space_handle_t      sc_baseioh;     /* base I/O handle */
};

CFATTACH_DECL_NEW(fdcisa, sizeof(struct fdc_isa_softc),
   fdc_isa_probe, fdc_isa_attach, NULL, NULL);

static int
fdc_isa_probe(device_t parent, cfdata_t cfp, void *aux)
{
       struct isa_attach_args  *ia = aux;
       static int              fdc_matched = 0;
       bus_space_tag_t         iot;
       bus_space_handle_t      ioh, ctl_ioh, base_ioh;
       int iobase;

       if (!atari_realconfig)
               return 0;

       /* Match only once */
       if (fdc_matched)
               return 0;

       iot = ia->ia_iot;

       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 addresses. */
       if (ia->ia_io[0].ir_addr == ISA_UNKNOWN_PORT)
               return (0);

       /* Don't allow wildcarded IRQ/DRQ. */
       if (ia->ia_irq[0].ir_irq == ISA_UNKNOWN_IRQ)
               return (0);

       if (ia->ia_drq[0].ir_drq == ISA_UNKNOWN_DRQ)
               return (0);

       /* Map the i/o space. */
       iobase = ia->ia_io[0].ir_addr;
       if (bus_space_map(iot, iobase, 6 /*  FDC_NPORT */, 0, &base_ioh)) {
               printf("fdcisaprobe: cannot map io-area\n");
               return 0;
       }
       if (bus_space_subregion(iot, base_ioh, 2, 4, &ioh)) {
               bus_space_unmap(iot, base_ioh, 6);
               return (0);
       }

       if (bus_space_map(iot, iobase + fdctl + 2, 1, 0, &ctl_ioh)) {
               bus_space_unmap(iot, base_ioh, 6);
               return (0);
       }

       /* Not needed for the rest of the probe. */
       bus_space_unmap(iot, ctl_ioh, 1);

       /* reset */
       bus_space_write_1(iot, ioh, fdout, 0);
       delay(100);
       bus_space_write_1(iot, ioh, fdout, FDO_FRST);

       /* see if it can handle a command */
       if (out_fdc(iot, ioh, NE7CMD_SPECIFY) < 0)
               goto out;
       out_fdc(iot, ioh, 0xdf);
       out_fdc(iot, ioh, 2);

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

       ia->ia_nirq = 1;
       ia->ia_ndrq = 1;

       ia->ia_niomem = 0;

out:
       bus_space_unmap(iot, base_ioh, 6 /* FDC_NPORT */);

       return fdc_matched;
}

static void
fdc_isa_attach(device_t parent, device_t self, void *aux)
{
       struct fdc_isa_softc    *isc = device_private(self);
       struct fdc_softc        *fdc = &isc->sc_fdc;
       struct isa_attach_args  *ia = aux;

       aprint_normal("\n");

       fdc->sc_dev = self;
       fdc->sc_iot = ia->ia_iot;
       fdc->sc_ic = ia->ia_ic;
       fdc->sc_drq = ia->ia_drq[0].ir_drq;

       if (bus_space_map(fdc->sc_iot, ia->ia_io[0].ir_addr,
           6 /* FDC_NPORT */, 0, &isc->sc_baseioh)) {
               aprint_error_dev(self, "unable to map I/O space\n");
               return;
       }

       if (bus_space_subregion(fdc->sc_iot, isc->sc_baseioh, 2, 4,
           &fdc->sc_ioh)) {
               aprint_error_dev(self, "unable to subregion I/O space\n");
               return;
       }

       if (bus_space_map(fdc->sc_iot, ia->ia_io[0].ir_addr + fdctl + 2, 1, 0,
           &fdc->sc_fdctlioh)) {
               aprint_error_dev(self, "unable to map CTL I/O space\n");
               return;
       }

       fdc->sc_ih = isa_intr_establish(ia->ia_ic, ia->ia_irq[0].ir_irq,
           IST_EDGE, IPL_BIO, fdcintr, fdc);

       fdcattach(fdc);
}

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