/*      $NetBSD: fdc_pnpbios.c,v 1.19 2016/07/11 11:31:49 msaitoh Exp $ */

/*-
* Copyright (c) 2000 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Jason R. Thorpe.
*
* 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.
*/

/*
* PNPBIOS attachment for the PC Floppy Controller driver.
*/

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: fdc_pnpbios.c,v 1.19 2016/07/11 11:31:49 msaitoh 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 <machine/intr.h>

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

#include <dev/isa/fdcvar.h>

#include <i386/pnpbios/pnpbiosvar.h>

int     fdc_pnpbios_match(device_t, cfdata_t, void *);
void    fdc_pnpbios_attach(device_t, device_t, void *);

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

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


CFATTACH_DECL_NEW(fdc_pnpbios, sizeof(struct fdc_pnpbios_softc),
   fdc_pnpbios_match, fdc_pnpbios_attach, NULL, NULL);

int
fdc_pnpbios_match(device_t parent, cfdata_t match, void *aux)
{
       struct pnpbiosdev_attach_args *aa = aux;

       if (strcmp(aa->idstr, "PNP0700") == 0)
               return (1);

       return (0);
}

void
fdc_pnpbios_attach(device_t parent, device_t self, void *aux)
{
       struct fdc_pnpbios_softc *pdc = device_private(self);
       struct fdc_softc *fdc = &pdc->sc_fdc;
       struct pnpbiosdev_attach_args *aa = aux;
       int size, base;

       aprint_normal("\n");

       fdc->sc_dev = self;
       fdc->sc_ic = aa->ic;

       if (pnpbios_io_map(aa->pbt, aa->resc, 0, &fdc->sc_iot,
           &pdc->sc_baseioh)) {
               aprint_error_dev(self, "unable to map I/O space\n");
               return;
       }

       /*
        * Start accounting for "odd" pnpbios's. Some probe as 4 ports,
        * some as 6 and some don't give the ctl port back.
        */

       if (pnpbios_getiosize(aa->pbt, aa->resc, 0, &size)) {
               aprint_error_dev(self, "can't get iobase size\n");
               return;
       }

       switch (size) {

       /* Easy case. This matches right up with what the fdc code expects. */
       case 4:
               fdc->sc_ioh = pdc->sc_baseioh;
               break;

       /* Map a subregion so this all lines up with the fdc code. */
       case 6:
               if (bus_space_subregion(fdc->sc_iot, pdc->sc_baseioh, 2, 4,
                   &fdc->sc_ioh)) {
                       aprint_error_dev(self,
                           "unable to subregion I/O space\n");
                       return;
               }
               break;
       default:
               aprint_error_dev(self, "unknown size: %d of io mapping\n",
                   size);
               return;
       }

       /*
        * XXX: This is bad. If the pnpbios claims only 1 I/O range then it's
        * omitting the controller I/O port. (One has to exist for there to
        * be a working fdc). Just try and force the mapping in.
        */

       if (aa->resc->numio == 1) {

               if (pnpbios_getiobase(aa->pbt, aa->resc, 0, 0, &base)) {
                       aprint_error_dev(self, "can't get iobase\n");
                       return;
               }
               if (bus_space_map(fdc->sc_iot, base + size + 1, 1, 0,
                   &fdc->sc_fdctlioh)) {
                       aprint_error_dev(self,
                           "unable to force map CTL I/O space\n");
                       return;
               }
       } else if (pnpbios_io_map(aa->pbt, aa->resc, 1, &fdc->sc_iot,
           &fdc->sc_fdctlioh)) {
               aprint_error_dev(self, "unable to map CTL I/O space\n");
               return;
       }

       if (pnpbios_getdmachan(aa->pbt, aa->resc, 0, &fdc->sc_drq)) {
               aprint_error_dev(self, "unable to get DMA channel\n");
               return;
       }

       pnpbios_print_devres(self, aa);
       if (aa->resc->numio == 1)
               aprint_error_dev(self,
                   "ctl io %x didn't probe. Forced attach\n",
                   base + size + 1);

       fdc->sc_ih = pnpbios_intr_establish(aa->pbt, aa->resc, 0, IPL_BIO,
           fdcintr, fdc);

       fdcattach(fdc);
}