sys/arch/arc/isa/mcclock_isa.c

   1 /*      $NetBSD: mcclock_isa.c,v 1.12 2008/03/28 19:05:49 tsutsui Exp $ */
   2 /*      $OpenBSD: clock_mc.c,v 1.9 1998/03/16 09:38:26 pefo Exp $       */
   3 /*      NetBSD: clock_mc.c,v 1.2 1995/06/28 04:30:30 cgd Exp    */
   4
   5 /*
   6  * Copyright (c) 1992, 1993
   7  *      The Regents of the University of California.  All rights reserved.
   8  *
   9  * This code is derived from software contributed to Berkeley by
  10  * the Systems Programming Group of the University of Utah Computer
  11  * Science Department and Ralph Campbell.
  12  *
  13  * Redistribution and use in source and binary forms, with or without
  14  * modification, are permitted provided that the following conditions
  15  * are met:
  16  * 1. Redistributions of source code must retain the above copyright
  17  *    notice, this list of conditions and the following disclaimer.
  18  * 2. Redistributions in binary form must reproduce the above copyright
  19  *    notice, this list of conditions and the following disclaimer in the
  20  *    documentation and/or other materials provided with the distribution.
  21  * 3. Neither the name of the University nor the names of its contributors
  22  *    may be used to endorse or promote products derived from this software
  23  *    without specific prior written permission.
  24  *
  25  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  26  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  27  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  28  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  29  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  30  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  31  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  32  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  33  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  34  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  35  * SUCH DAMAGE.
  36  *
  37  * from: Utah Hdr: clock.c 1.18 91/01/21
  38  *
  39  *      @(#)clock.c     8.1 (Berkeley) 6/10/93
  40  */
  41 /*
  42  * Copyright (c) 1988 University of Utah.
  43  *
  44  * This code is derived from software contributed to Berkeley by
  45  * the Systems Programming Group of the University of Utah Computer
  46  * Science Department and Ralph Campbell.
  47  *
  48  * Redistribution and use in source and binary forms, with or without
  49  * modification, are permitted provided that the following conditions
  50  * are met:
  51  * 1. Redistributions of source code must retain the above copyright
  52  *    notice, this list of conditions and the following disclaimer.
  53  * 2. Redistributions in binary form must reproduce the above copyright
  54  *    notice, this list of conditions and the following disclaimer in the
  55  *    documentation and/or other materials provided with the distribution.
  56  * 3. All advertising materials mentioning features or use of this software
  57  *    must display the following acknowledgement:
  58  *      This product includes software developed by the University of
  59  *      California, Berkeley and its contributors.
  60  * 4. Neither the name of the University nor the names of its contributors
  61  *    may be used to endorse or promote products derived from this software
  62  *    without specific prior written permission.
  63  *
  64  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  65  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  66  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  67  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  68  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  69  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  70  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  71  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  72  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  73  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  74  * SUCH DAMAGE.
  75  *
  76  * from: Utah Hdr: clock.c 1.18 91/01/21
  77  *
  78  *      @(#)clock.c     8.1 (Berkeley) 6/10/93
  79  */
  80
  81 #include <sys/cdefs.h>
  82 __KERNEL_RCSID(0, "$NetBSD: mcclock_isa.c,v 1.12 2008/03/28 19:05:49 tsutsui Exp $");
  83
  84 #include <sys/param.h>
  85 #include <sys/systm.h>
  86 #include <sys/device.h>
  87
  88 #include <machine/bus.h>
  89
  90 #include <dev/isa/isareg.h>
  91 #include <dev/isa/isavar.h>
  92
  93 #include <dev/clock_subr.h>
  94
  95 #include <dev/ic/mc146818reg.h>
  96 #include <dev/ic/mc146818var.h>
  97
  98 #include <arc/isa/mcclock_isavar.h>
  99
 100 int mcclock_isa_match(device_t, cfdata_t, void *);
 101 void mcclock_isa_attach(device_t, device_t, void *);
 102
 103 CFATTACH_DECL_NEW(mcclock_isa, sizeof(struct mc146818_softc),
 104     mcclock_isa_match, mcclock_isa_attach, NULL, NULL);
 105
 106 /* Deskstation clock access code */
 107 static u_int mc_isa_read(struct mc146818_softc *, u_int);
 108 static void mc_isa_write(struct mc146818_softc *, u_int, u_int);
 109
 110 int mcclock_isa_conf = 0;
 111
 112 int
 113 mcclock_isa_match(device_t parent, cfdata_t cf, void *aux)
 114 {
 115         struct isa_attach_args *ia = aux;
 116         bus_space_handle_t ioh;
 117
 118         if (ia->ia_nio < 1 ||
 119             (ia->ia_io[0].ir_addr != ISA_UNKNOWN_PORT &&
 120              ia->ia_io[0].ir_addr != 0x70))
 121                 return 0;
 122
 123         if (ia->ia_niomem > 0 &&
 124             (ia->ia_iomem[0].ir_addr != ISA_UNKNOWN_IOMEM))
 125                 return 0;
 126
 127         if (ia->ia_nirq > 0 &&
 128             (ia->ia_irq[0].ir_irq != ISA_UNKNOWN_IRQ))
 129                 return 0;
 130
 131         if (ia->ia_ndrq > 0 &&
 132             (ia->ia_drq[0].ir_drq != ISA_UNKNOWN_DRQ))
 133                 return 0;
 134
 135         if (!mcclock_isa_conf)
 136                 return 0;
 137
 138         if (bus_space_map(ia->ia_iot, 0x70, 0x02, 0, &ioh))
 139                 return 0;
 140
 141         bus_space_unmap(ia->ia_iot, ioh, 0x02);
 142
 143         ia->ia_nio = 1;
 144         ia->ia_io[0].ir_addr = 0x70;
 145         ia->ia_io[0].ir_size = 0x02;
 146
 147         ia->ia_niomem = 0;
 148         ia->ia_nirq = 0;
 149         ia->ia_ndrq = 0;
 150
 151         return 1;
 152 }
 153
 154 void
 155 mcclock_isa_attach(device_t parent, device_t self, void *aux)
 156 {
 157         struct mc146818_softc *sc = device_private(self);
 158         struct isa_attach_args *ia = aux;
 159
 160         sc->sc_dev = self;
 161         sc->sc_bst = ia->ia_iot;
 162         if (bus_space_map(sc->sc_bst, ia->ia_io[0].ir_addr,
 163             ia->ia_io[0].ir_size, 0, &sc->sc_bsh))
 164                 panic("mcclock_isa_attach: couldn't map clock I/O space");
 165
 166         sc->sc_year0 = 1980;
 167         sc->sc_mcread  = mc_isa_read;
 168         sc->sc_mcwrite = mc_isa_write;
 169
 170         mc146818_attach(sc);
 171
 172         aprint_normal("\n");
 173
 174         /* Turn interrupts off, just in case. */
 175         mc_isa_write(sc, MC_REGB, MC_REGB_BINARY | MC_REGB_24HR);
 176 }
 177
 178 u_int
 179 mc_isa_read(struct mc146818_softc *sc, u_int reg)
 180 {
 181
 182         bus_space_write_1(sc->sc_bst, sc->sc_bsh, 0, reg);
 183         return bus_space_read_1(sc->sc_bst, sc->sc_bsh, 1);
 184 }
 185
 186 void
 187 mc_isa_write(struct mc146818_softc *sc, u_int reg, u_int datum)
 188 {
 189
 190         bus_space_write_1(sc->sc_bst, sc->sc_bsh, 0, reg);
 191         bus_space_write_1(sc->sc_bst, sc->sc_bsh, 1, datum);
 192 }
 193