sys/dev/isa/fdc_isa.c

   1 /*      $NetBSD: fdc_isa.c,v 1.17 2008/03/16 00:58:56 cube Exp $        */
   2
   3 /*-
   4  * Copyright (c) 1998 The NetBSD Foundation, Inc.
   5  * All rights reserved.
   6  *
   7  * This code is derived from software contributed to The NetBSD Foundation
   8  * by Charles M. Hannum.
   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  * Copyright (c) 1990 The Regents of the University of California.
  34  * All rights reserved.
  35  *
  36  * This code is derived from software contributed to Berkeley by
  37  * Don Ahn.
  38  *
  39  * Redistribution and use in source and binary forms, with or without
  40  * modification, are permitted provided that the following conditions
  41  * are met:
  42  * 1. Redistributions of source code must retain the above copyright
  43  *    notice, this list of conditions and the following disclaimer.
  44  * 2. Redistributions in binary form must reproduce the above copyright
  45  *    notice, this list of conditions and the following disclaimer in the
  46  *    documentation and/or other materials provided with the distribution.
  47  * 3. Neither the name of the University nor the names of its contributors
  48  *    may be used to endorse or promote products derived from this software
  49  *    without specific prior written permission.
  50  *
  51  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  52  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  53  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  54  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  55  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  56  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  57  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  58  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  59  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  60  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  61  * SUCH DAMAGE.
  62  *
  63  *      @(#)fd.c        7.4 (Berkeley) 5/25/91
  64  */
  65
  66 #include <sys/cdefs.h>
  67 __KERNEL_RCSID(0, "$NetBSD: fdc_isa.c,v 1.17 2008/03/16 00:58:56 cube Exp $");
  68
  69 #include "rnd.h"
  70
  71 #include <sys/param.h>
  72 #include <sys/systm.h>
  73 #include <sys/callout.h>
  74 #include <sys/device.h>
  75 #include <sys/buf.h>
  76 #include <sys/queue.h>
  77 #if NRND > 0
  78 #include <sys/rnd.h>
  79 #endif
  80
  81 #include <sys/bus.h>
  82 #include <sys/intr.h>
  83
  84 #include <dev/isa/isavar.h>
  85 #include <dev/isa/isadmavar.h>
  86
  87 #include <dev/isa/fdreg.h>
  88 #include <dev/isa/fdcvar.h>
  89
  90 static int      fdc_isa_probe(device_t, cfdata_t, void *);
  91 static void     fdc_isa_attach(device_t, device_t, void *);
  92 static int      fdc_isa_detach(device_t, int);
  93
  94 struct fdc_isa_softc {
  95         struct fdc_softc sc_fdc;        /* base fdc device */
  96
  97         bus_space_handle_t sc_baseioh;  /* base I/O handle */
  98 };
  99
 100 CFATTACH_DECL2_NEW(fdc_isa, sizeof(struct fdc_isa_softc),
 101     fdc_isa_probe, fdc_isa_attach, fdc_isa_detach, NULL, NULL, fdc_childdet);
 102
 103 #ifdef NEWCONFIG
 104 void    fdc_isa_forceintr(void *);
 105 #endif
 106
 107 static int
 108 fdc_isa_probe(device_t parent, cfdata_t match, void *aux)
 109 {
 110         struct isa_attach_args *ia = aux;
 111         bus_space_tag_t iot;
 112         bus_space_handle_t ioh, ctl_ioh, base_ioh;
 113         int rv, iobase;
 114
 115         iot = ia->ia_iot;
 116         rv = 0;
 117
 118         if (ia->ia_nio < 1)
 119                 return (0);
 120         if (ia->ia_nirq < 1)
 121                 return (0);
 122         if (ia->ia_ndrq < 1)
 123                 return (0);
 124
 125         if (ISA_DIRECT_CONFIG(ia))
 126                 return (0);
 127
 128         /* Disallow wildcarded I/O addresses. */
 129         if (ia->ia_io[0].ir_addr == ISA_UNKNOWN_PORT)
 130                 return (0);
 131
 132         /* Don't allow wildcarded IRQ/DRQ. */
 133         if (ia->ia_irq[0].ir_irq == ISA_UNKNOWN_IRQ)
 134                 return (0);
 135
 136         if (ia->ia_drq[0].ir_drq == ISA_UNKNOWN_DRQ)
 137                 return (0);
 138
 139         /* Map the I/O space. */
 140         iobase = ia->ia_io[0].ir_addr;
 141         if (bus_space_map(iot, iobase, 6 /* FDC_NPORT */, 0, &base_ioh))
 142                 return (0);
 143
 144         if (bus_space_subregion(iot, base_ioh, 2, 4, &ioh)) {
 145                 bus_space_unmap(iot, base_ioh, 6);
 146                 return (0);
 147         }
 148
 149         if (bus_space_map(iot, iobase + fdctl + 2, 1, 0, &ctl_ioh)) {
 150                 bus_space_unmap(iot, base_ioh, 6);
 151                 return (0);
 152         }
 153
 154         /* Not needed for the rest of the probe. */
 155         bus_space_unmap(iot, ctl_ioh, 1);
 156
 157         /* reset */
 158         bus_space_write_1(iot, ioh, fdout, 0);
 159         delay(100);
 160         bus_space_write_1(iot, ioh, fdout, FDO_FRST);
 161
 162         /* see if it can handle a command */
 163         if (out_fdc(iot, ioh, NE7CMD_SPECIFY) < 0)
 164                 goto out;
 165         out_fdc(iot, ioh, 0xdf);
 166         out_fdc(iot, ioh, 2);
 167
 168         rv = 1;
 169         ia->ia_nio = 1;
 170         ia->ia_io[0].ir_size = FDC_NPORT;
 171
 172         ia->ia_nirq = 1;
 173         ia->ia_ndrq = 1;
 174
 175         ia->ia_niomem = 0;
 176
 177  out:
 178         bus_space_unmap(iot, base_ioh, 6 /* FDC_NPORT */);
 179         return (rv);
 180 }
 181
 182 static int
 183 fdc_isa_detach(device_t self, int flags)
 184 {
 185         int rc;
 186         struct fdc_isa_softc *isc = device_private(self);
 187         struct fdc_softc *fdc = &isc->sc_fdc;
 188
 189         if ((rc = fdcdetach(self, flags)) != 0)
 190                 return rc;
 191
 192         isa_intr_disestablish(fdc->sc_ic, fdc->sc_ih);
 193
 194         bus_space_unmap(fdc->sc_iot, fdc->sc_fdctlioh, 1);
 195
 196         bus_space_unmap(fdc->sc_iot, isc->sc_baseioh, 6 /* FDC_NPORT */);
 197
 198         return 0;
 199 }
 200
 201 static void
 202 fdc_isa_attach(device_t parent, device_t self, void *aux)
 203 {
 204         struct fdc_isa_softc *isc = device_private(self);
 205         struct fdc_softc *fdc = &isc->sc_fdc;
 206         struct isa_attach_args *ia = aux;
 207
 208         aprint_naive("\n");
 209         aprint_normal("\n");
 210
 211         fdc->sc_dev = self;
 212         fdc->sc_iot = ia->ia_iot;
 213         fdc->sc_ic = ia->ia_ic;
 214         fdc->sc_drq = ia->ia_drq[0].ir_drq;
 215
 216         if (bus_space_map(fdc->sc_iot, ia->ia_io[0].ir_addr,
 217             6 /* FDC_NPORT */, 0, &isc->sc_baseioh)) {
 218                 aprint_normal_dev(fdc->sc_dev, "unable to map I/O space\n");
 219                 return;
 220         }
 221
 222         if (bus_space_subregion(fdc->sc_iot, isc->sc_baseioh, 2, 4,
 223             &fdc->sc_ioh)) {
 224                 aprint_normal_dev(fdc->sc_dev,
 225                     "unable to subregion I/O space\n");
 226                 return;
 227         }
 228
 229         if (bus_space_map(fdc->sc_iot, ia->ia_io[0].ir_addr + fdctl + 2, 1, 0,
 230             &fdc->sc_fdctlioh)) {
 231                 aprint_normal_dev(fdc->sc_dev,
 232                     "unable to map CTL I/O space\n");
 233                 return;
 234         }
 235
 236         fdc->sc_ih = isa_intr_establish(ia->ia_ic, ia->ia_irq[0].ir_irq,
 237             IST_EDGE, IPL_BIO, fdcintr, fdc);
 238
 239         fdcattach(fdc);
 240 }