sys/dev/isa/tsdio.c

   1 /*      $NetBSD: tsdio.c,v 1.9 2009/05/12 08:44:20 cegger Exp $ */
   2
   3 /*-
   4  * Copyright (c) 2005 The NetBSD Foundation, Inc.
   5  * All rights reserved.
   6  *
   7  * This code is derived from software contributed to The NetBSD Foundation
   8  * by Jesse Off
   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 #include <sys/cdefs.h>
  33 __KERNEL_RCSID(0, "$NetBSD: tsdio.c,v 1.9 2009/05/12 08:44:20 cegger Exp $");
  34
  35 #include <sys/param.h>
  36 #include <sys/systm.h>
  37 #include <sys/device.h>
  38
  39 #include <sys/bus.h>
  40 #include <sys/intr.h>
  41
  42 #include <dev/isa/isareg.h>
  43 #include <dev/isa/isavar.h>
  44 #include <dev/isa/isadmavar.h>
  45 #include <dev/isa/tsdiovar.h>
  46
  47 int     tsdio_probe(device_t, cfdata_t, void *);
  48 void    tsdio_attach(device_t, device_t, void *);
  49 int     tsdio_search(device_t, cfdata_t, const int *, void *);
  50 int     tsdio_print(void *, const char *);
  51
  52 CFATTACH_DECL(tsdio, sizeof(struct tsdio_softc),
  53     tsdio_probe, tsdio_attach, NULL, NULL);
  54
  55 int
  56 tsdio_probe(device_t parent, cfdata_t cf, void *aux)
  57 {
  58         struct isa_attach_args *ia = aux;
  59         bus_space_tag_t iot = ia->ia_iot;
  60         bus_space_handle_t dioh;
  61         int rv = 0, have_io = 0;
  62
  63         if (ia->ia_nio < 1)
  64                 return (0);
  65         if (ia->ia_nirq < 1)
  66                 return (0);
  67
  68         if (ISA_DIRECT_CONFIG(ia))
  69                 return (0);
  70
  71         /*
  72          * Disallow wildcarded I/O base.
  73          */
  74         if (ia->ia_io[0].ir_addr == ISA_UNKNOWN_PORT)
  75                 return (0);
  76
  77         /*
  78          * Map the I/O space.
  79          */
  80         if (bus_space_map(ia->ia_iot, ia->ia_io[0].ir_addr, 8,
  81             0, &dioh))
  82                 goto out;
  83         have_io = 1;
  84
  85         if (bus_space_read_1(ia->ia_iot, dioh, 0) != 0x54) {
  86                 goto out;
  87         }
  88
  89         rv = 1;
  90         ia->ia_nio = 1;
  91         ia->ia_io[0].ir_size = 8;
  92         ia->ia_niomem = 0;
  93         ia->ia_nirq = 0;
  94         ia->ia_ndrq = 0;
  95
  96  out:
  97         if (have_io)
  98                 bus_space_unmap(iot, dioh, 8);
  99
 100         return (rv);
 101 }
 102
 103 void
 104 tsdio_attach(device_t parent, device_t self, void *aux)
 105 {
 106         struct tsdio_softc *sc = (struct tsdio_softc *) self;
 107         struct isa_attach_args *ia = aux;
 108
 109         sc->sc_iot = ia->ia_iot;
 110
 111         aprint_normal(": Technologic Systems TS-DIO24\n");
 112
 113         /*
 114          * Map the device.
 115          */
 116         if (bus_space_map(sc->sc_iot, ia->ia_io[0].ir_addr, 8,
 117             0, &sc->sc_ioh)) {
 118                 aprint_error_dev(&sc->sc_dev, "unable to map i/o space\n");
 119                 return;
 120         }
 121
 122         /*
 123          *  Attach sub-devices
 124          */
 125         config_search_ia(tsdio_search, self, "tsdio", NULL);
 126 }
 127
 128 int
 129 tsdio_search(device_t parent, cfdata_t cf, const int *l, void *aux)
 130 {
 131         struct tsdio_softc *sc = (struct tsdio_softc *)parent;
 132         struct tsdio_attach_args sa;
 133
 134         sa.ta_iot = sc->sc_iot;
 135         sa.ta_ioh = sc->sc_ioh;
 136
 137         if (config_match(parent, cf, &sa) > 0)
 138                 config_attach(parent, cf, &sa, tsdio_print);
 139
 140         return (0);
 141 }
 142
 143 int
 144 tsdio_print(void *aux, const char *name)
 145 {
 146
 147         return (UNCONF);
 148 }