sys/dev/isa/lm_isa.c

   1 /*      $NetBSD: lm_isa.c,v 1.21 2008/10/12 13:17:28 pgoyette Exp $ */
   2
   3 /*-
   4  * Copyright (c) 2000 The NetBSD Foundation, Inc.
   5  * All rights reserved.
   6  *
   7  * This code is derived from software contributed to The NetBSD Foundation
   8  * by Bill Squier.
   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: lm_isa.c,v 1.21 2008/10/12 13:17:28 pgoyette Exp $");
  34
  35 #include <sys/param.h>
  36 #include <sys/systm.h>
  37 #include <sys/kernel.h>
  38 #include <sys/device.h>
  39 #include <sys/conf.h>
  40
  41 #include <sys/bus.h>
  42
  43 #include <dev/isa/isareg.h>
  44 #include <dev/isa/isavar.h>
  45
  46 #include <dev/sysmon/sysmonvar.h>
  47
  48 #include <dev/ic/nslm7xvar.h>
  49
  50 int     lm_isa_match(device_t, cfdata_t, void *);
  51 void    lm_isa_attach(device_t, device_t, void *);
  52 int     lm_isa_detach(device_t, int);
  53
  54 uint8_t lm_isa_readreg(struct lm_softc *, int);
  55 void    lm_isa_writereg(struct lm_softc *, int, int);
  56
  57 struct lm_isa_softc {
  58         struct lm_softc lmsc;
  59         bus_space_tag_t lm_iot;
  60         bus_space_handle_t lm_ioh;
  61 };
  62
  63 CFATTACH_DECL_NEW(lm_isa, sizeof(struct lm_isa_softc),
  64     lm_isa_match, lm_isa_attach, lm_isa_detach, NULL);
  65
  66 int
  67 lm_isa_match(device_t parent, cfdata_t match, void *aux)
  68 {
  69         bus_space_handle_t ioh;
  70         struct isa_attach_args *ia = aux;
  71         struct lm_isa_softc sc;
  72         int rv;
  73
  74         /* Must supply an address */
  75         if (ia->ia_nio < 1)
  76                 return 0;
  77
  78         if (ISA_DIRECT_CONFIG(ia))
  79                 return 0;
  80
  81         if (ia->ia_io[0].ir_addr == ISA_UNKNOWN_PORT)
  82                 return 0;
  83
  84         if (bus_space_map(ia->ia_iot, ia->ia_io[0].ir_addr, 8, 0, &ioh))
  85                 return 0;
  86
  87
  88         /* Bus independent probe */
  89         sc.lm_iot = ia->ia_iot;
  90         sc.lm_ioh = ioh;
  91         sc.lmsc.lm_writereg = lm_isa_writereg;
  92         sc.lmsc.lm_readreg = lm_isa_readreg;
  93         rv = lm_probe(&sc.lmsc);
  94
  95         bus_space_unmap(ia->ia_iot, ioh, 8);
  96
  97         if (rv) {
  98                 ia->ia_nio = 1;
  99                 ia->ia_io[0].ir_size = 8;
 100
 101                 ia->ia_niomem = 0;
 102                 ia->ia_nirq = 0;
 103                 ia->ia_ndrq = 0;
 104         }
 105
 106         return rv;
 107 }
 108
 109
 110 void
 111 lm_isa_attach(device_t parent, device_t self, void *aux)
 112 {
 113         struct lm_isa_softc *sc = device_private(self);
 114         struct isa_attach_args *ia = aux;
 115
 116         sc->lm_iot = ia->ia_iot;
 117
 118         if (bus_space_map(ia->ia_iot, ia->ia_io[0].ir_addr, 8, 0,
 119             &sc->lm_ioh)) {
 120                 aprint_error(": can't map i/o space\n");
 121                 return;
 122         }
 123
 124         /* Bus-independent attachment */
 125         sc->lmsc.sc_dev = self;
 126         sc->lmsc.lm_writereg = lm_isa_writereg;
 127         sc->lmsc.lm_readreg = lm_isa_readreg;
 128
 129         lm_attach(&sc->lmsc);
 130 }
 131
 132 int
 133 lm_isa_detach(device_t self, int flags)
 134 {
 135         struct lm_isa_softc *sc = device_private(self);
 136
 137         lm_detach(&sc->lmsc);
 138         bus_space_unmap(sc->lm_iot, sc->lm_ioh, 8);
 139         return 0;
 140 }
 141
 142 uint8_t
 143 lm_isa_readreg(struct lm_softc *lmsc, int reg)
 144 {
 145         struct lm_isa_softc *sc = (struct lm_isa_softc *)lmsc;
 146
 147         bus_space_write_1(sc->lm_iot, sc->lm_ioh, LMC_ADDR, reg);
 148         return bus_space_read_1(sc->lm_iot, sc->lm_ioh, LMC_DATA);
 149 }
 150
 151
 152 void
 153 lm_isa_writereg(struct lm_softc *lmsc, int reg, int val)
 154 {
 155         struct lm_isa_softc *sc = (struct lm_isa_softc *)lmsc;
 156
 157         bus_space_write_1(sc->lm_iot, sc->lm_ioh, LMC_ADDR, reg);
 158         bus_space_write_1(sc->lm_iot, sc->lm_ioh, LMC_DATA, val);
 159 }
 160