/*      $NetBSD: fdc_isa.c,v 1.21 2022/04/18 10:09:07 jmcneill 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: fdc_isa.c,v 1.21 2022/04/18 10:09:07 jmcneill Exp $");

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

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

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

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

static int      fdc_isa_probe(device_t, cfdata_t, void *);
static void     fdc_isa_attach(device_t, device_t, void *);
static int      fdc_isa_detach(device_t, int);

struct fdc_isa_softc {
       struct fdc_softc sc_fdc;        /* base fdc device */

       bus_space_handle_t sc_baseioh;  /* base I/O handle */
};

CFATTACH_DECL2_NEW(fdc_isa, sizeof(struct fdc_isa_softc),
   fdc_isa_probe, fdc_isa_attach, fdc_isa_detach, NULL, NULL, fdc_childdet);

#ifdef NEWCONFIG
void    fdc_isa_forceintr(void *);
#endif

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

       iot = ia->ia_iot;
       rv = 0;

       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);

       /* ISA chipset tag is required for DMA support. */
       if (ia->ia_ic == NULL)
               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))
               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);

       rv = 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 (rv);
}

static int
fdc_isa_detach(device_t self, int flags)
{
       int rc;
       struct fdc_isa_softc *isc = device_private(self);
       struct fdc_softc *fdc = &isc->sc_fdc;

       if ((rc = fdcdetach(self, flags)) != 0)
               return rc;

       isa_intr_disestablish(fdc->sc_ic, fdc->sc_ih);

       bus_space_unmap(fdc->sc_iot, fdc->sc_fdctlioh, 1);

       bus_space_unmap(fdc->sc_iot, isc->sc_baseioh, 6 /* FDC_NPORT */);

       return 0;
}

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_naive("\n");
       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_normal_dev(fdc->sc_dev, "unable to map I/O space\n");
               return;
       }

       if (bus_space_subregion(fdc->sc_iot, isc->sc_baseioh, 2, 4,
           &fdc->sc_ioh)) {
               aprint_normal_dev(fdc->sc_dev,
                   "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_normal_dev(fdc->sc_dev,
                   "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);
}