sys/arch/alpha/jensenio/mcclock_jensenio.c

   1 /* $NetBSD: mcclock_jensenio.c,v 1.8 2008/03/29 05:42:45 tsutsui Exp $ */
   2
   3 /*-
   4  * Copyright (c) 1999 The NetBSD Foundation, Inc.
   5  * All rights reserved.
   6  *
   7  * This code is derived from software contributed to The NetBSD Foundation
   8  * by Jason R. Thorpe.
   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) 1995, 1996 Carnegie-Mellon University.
  34  * All rights reserved.
  35  *
  36  * Author: Chris G. Demetriou
  37  *
  38  * Permission to use, copy, modify and distribute this software and
  39  * its documentation is hereby granted, provided that both the copyright
  40  * notice and this permission notice appear in all copies of the
  41  * software, derivative works or modified versions, and any portions
  42  * thereof, and that both notices appear in supporting documentation.
  43  *
  44  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
  45  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
  46  * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
  47  *
  48  * Carnegie Mellon requests users of this software to return to
  49  *
  50  *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
  51  *  School of Computer Science
  52  *  Carnegie Mellon University
  53  *  Pittsburgh PA 15213-3890
  54  *
  55  * any improvements or extensions that they make and grant Carnegie the
  56  * rights to redistribute these changes.
  57  */
  58
  59 #include <sys/cdefs.h>                  /* RCS ID & Copyright macro defns */
  60
  61 __KERNEL_RCSID(0, "$NetBSD: mcclock_jensenio.c,v 1.8 2008/03/29 05:42:45 tsutsui Exp $");
  62
  63 #include <sys/param.h>
  64 #include <sys/kernel.h>
  65 #include <sys/systm.h>
  66 #include <sys/device.h>
  67
  68 #include <machine/bus.h>
  69
  70 #include <dev/clock_subr.h>
  71
  72 #include <dev/ic/mc146818reg.h>
  73 #include <dev/ic/mc146818var.h>
  74 #include <dev/eisa/eisavar.h>
  75 #include <dev/isa/isavar.h>
  76 #include <alpha/jensenio/jenseniovar.h>
  77 #include <alpha/alpha/mcclockvar.h>
  78
  79 struct mcclock_jensenio_softc {
  80         struct mc146818_softc   sc_mc146818;
  81
  82         bus_space_handle_t      sc_std_rtc_ioh;
  83 };
  84
  85 int     mcclock_jensenio_match(device_t, cfdata_t, void *);
  86 void    mcclock_jensenio_attach(device_t, device_t, void *);
  87
  88 CFATTACH_DECL_NEW(mcclock_jensenio, sizeof(struct mcclock_jensenio_softc),
  89     mcclock_jensenio_match, mcclock_jensenio_attach, NULL, NULL);
  90
  91 void    mcclock_jensenio_write(struct mc146818_softc *, u_int, u_int);
  92 u_int   mcclock_jensenio_read(struct mc146818_softc *, u_int);
  93
  94
  95 int
  96 mcclock_jensenio_match(device_t parent, cfdata_t cf, void *aux)
  97 {
  98         struct jensenio_attach_args *ja = aux;
  99
 100         /* Always present. */
 101         if (strcmp(ja->ja_name, cf->cf_name) == 0)
 102                 return (1);
 103
 104         return (0);
 105 }
 106
 107 void
 108 mcclock_jensenio_attach(device_t parent, device_t self, void *aux)
 109 {
 110         struct mcclock_jensenio_softc *jsc = device_private(self);
 111         struct jensenio_attach_args *ja = aux;
 112         struct mc146818_softc *sc = &jsc->sc_mc146818;
 113
 114         sc->sc_dev = self;
 115         sc->sc_bst = ja->ja_iot;
 116         if (bus_space_map(sc->sc_bst, ja->ja_ioaddr, 0x02, 0,
 117             &sc->sc_bsh))
 118                 panic("mcclock_jensenio_attach: couldn't map clock I/O space");
 119
 120         /*
 121          * Map the I/O space normally used by the ISA RTC (port 0x70) so
 122          * as to avoid a false match at that address, as well.
 123          */
 124         (void)bus_space_map(sc->sc_bst, 0x70, 0x02, 0,
 125             &jsc->sc_std_rtc_ioh);
 126
 127         sc->sc_mcread  = mcclock_jensenio_read;
 128         sc->sc_mcwrite = mcclock_jensenio_write;
 129
 130         mcclock_attach(sc);
 131 }
 132
 133 void
 134 mcclock_jensenio_write(struct mc146818_softc *sc, u_int reg, u_int datum)
 135 {
 136         bus_space_tag_t iot = sc->sc_bst;
 137         bus_space_handle_t ioh = sc->sc_bsh;
 138
 139         bus_space_write_1(iot, ioh, 0, reg);
 140         bus_space_write_1(iot, ioh, 1, datum);
 141 }
 142
 143 u_int
 144 mcclock_jensenio_read(struct mc146818_softc *sc, u_int reg)
 145 {
 146         bus_space_tag_t iot = sc->sc_bst;
 147         bus_space_handle_t ioh = sc->sc_bsh;
 148
 149         bus_space_write_1(iot, ioh, 0, reg);
 150         return bus_space_read_1(iot, ioh, 1);
 151 }