sys/arch/prep/pnpbus/fdc_pnpbus.c

   1 /*      $NetBSD: fdc_pnpbus.c,v 1.1 2008/04/28 19:01:45 garbled Exp $   */
   2
   3 /*-
   4  * Copyright (c) 2008 The NetBSD Foundation, Inc.
   5  * All rights reserved.
   6  *
   7  * This code is derived from software contributed to The NetBSD Foundation
   8  * by Tim Rightnour
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
  20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
  23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  29  * POSSIBILITY OF SUCH DAMAGE.
  30  */
  31
  32 /*
  33  * PNPBIOS attachment for the PC Floppy Controller driver.
  34  */
  35
  36 #include <sys/cdefs.h>
  37 __KERNEL_RCSID(0, "$NetBSD: fdc_pnpbus.c,v 1.1 2008/04/28 19:01:45 garbled Exp $");
  38
  39 #include "rnd.h"
  40
  41 #include <sys/param.h>
  42 #include <sys/systm.h>
  43 #include <sys/callout.h>
  44 #include <sys/device.h>
  45 #include <sys/buf.h>
  46 #include <sys/queue.h>
  47 #if NRND > 0
  48 #include <sys/rnd.h>
  49 #endif
  50
  51 #include <machine/bus.h>
  52 #include <machine/intr.h>
  53 #include <machine/isa_machdep.h>
  54
  55 #include <dev/isa/isavar.h>
  56 #include <dev/isa/isadmavar.h>
  57
  58 #include <dev/isa/fdcvar.h>
  59
  60 #include <prep/pnpbus/pnpbusvar.h>
  61
  62 static int      fdc_pnpbus_match(device_t, cfdata_t, void *);
  63 static void     fdc_pnpbus_attach(device_t, device_t, void *);
  64
  65 struct fdc_pnpbus_softc {
  66         struct fdc_softc sc_fdc;        /* base fdc device */
  67
  68         bus_space_handle_t sc_baseioh;  /* base I/O handle */
  69 };
  70
  71 CFATTACH_DECL2_NEW(fdc_pnpbus, sizeof(struct fdc_pnpbus_softc),
  72     fdc_pnpbus_match, fdc_pnpbus_attach, NULL, NULL, NULL, NULL);
  73
  74 static int
  75 fdc_pnpbus_match(device_t parent, cfdata_t match, void *aux)
  76 {
  77         struct pnpbus_dev_attach_args *pna = aux;
  78         int ret = 0;
  79
  80         if (strcmp(pna->pna_devid, "PNP0700") == 0)
  81                 ret = 1;
  82
  83         if (ret)
  84                 pnpbus_scan(pna, pna->pna_ppc_dev);
  85
  86         return ret;
  87 }
  88
  89 static void
  90 fdc_pnpbus_attach(device_t parent, device_t self, void *aux)
  91 {
  92         struct fdc_pnpbus_softc *pdc = device_private(self);
  93         struct fdc_softc *fdc = &pdc->sc_fdc;
  94         struct pnpbus_dev_attach_args *pna = aux;
  95         int size, base;
  96
  97         fdc->sc_dev = self;
  98         fdc->sc_ic = pna->pna_ic;
  99
 100         if (pnpbus_io_map(&pna->pna_res, 0, &fdc->sc_iot, &pdc->sc_baseioh)) {
 101                 aprint_error_dev(self, "unable to map I/O space\n");
 102                 return;
 103         }
 104
 105         /*
 106          * Start accounting for "odd" pnpbus's. Some probe as 4 ports,
 107          * some as 6 and some don't give the ctl port back.
 108          */
 109
 110         if (pnpbus_getioport(&pna->pna_res, 0, &base, &size)) {
 111                 aprint_error_dev(self, "can't get iobase size\n");
 112                 return;
 113         }
 114
 115         switch (size) {
 116
 117         /* Easy case. This matches right up with what the fdc code expects. */
 118         case 4:
 119                 fdc->sc_ioh = pdc->sc_baseioh;
 120                 break;
 121
 122         /* Map a subregion so this all lines up with the fdc code. */
 123         case 6:
 124                 if (bus_space_subregion(fdc->sc_iot, pdc->sc_baseioh, 2, 4,
 125                     &fdc->sc_ioh)) {
 126                         aprint_error_dev(self,
 127                             "unable to subregion I/O space\n");
 128                         return;
 129                 }
 130                 break;
 131         default:
 132                 aprint_error_dev(self, "unknown size: %d of io mapping\n", size);
 133                 return;
 134         }
 135
 136         /*
 137          * XXX: This is bad. If the pnpbus claims only 1 I/O range then it's
 138          * omitting the controller I/O port. (One has to exist for there to
 139          * be a working fdc). Just try and force the mapping in.
 140          */
 141
 142         if (pna->pna_res.numio == 1) {
 143                 if (bus_space_map(fdc->sc_iot, base + size + 1, 1, 0,
 144                     &fdc->sc_fdctlioh)) {
 145                         aprint_error_dev(self,
 146                             "unable to force map CTL I/O space\n");
 147                         return;
 148                 }
 149         } else if (pnpbus_io_map(&pna->pna_res, 1, &fdc->sc_iot,
 150                    &fdc->sc_fdctlioh)) {
 151                 aprint_error_dev(self, "unable to map CTL I/O space\n");
 152                 return;
 153         }
 154
 155         if (pnpbus_getdmachan(&pna->pna_res, 0, &fdc->sc_drq)) {
 156                 aprint_error_dev(self, "unable to get DMA channel\n");
 157                 return;
 158         }
 159
 160         if (pna->pna_res.numio == 1)
 161                 aprint_normal_dev(self,
 162                     "ctl io %x didn't probe. Forced attach\n", base + size + 1);
 163
 164         aprint_normal("\n");
 165
 166         /* The 7043-140 gets the type wrong, so overide to edge allways */
 167         fdc->sc_ih = pnpbus_intr_establish(0, IPL_BIO, IST_EDGE, fdcintr, fdc,
 168             &pna->pna_res);
 169
 170         fdcattach(fdc);
 171 }