sys/arch/ews4800mips/sbd/mkclock_sbdio.c

   1 /*      $NetBSD: mkclock_sbdio.c,v 1.6 2008/03/29 08:14:41 tsutsui Exp $        */
   2
   3 /*-
   4  * Copyright (c) 1996 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 #include <sys/cdefs.h>
  33 __KERNEL_RCSID(0, "$NetBSD: mkclock_sbdio.c,v 1.6 2008/03/29 08:14:41 tsutsui Exp $");
  34
  35 #include <sys/param.h>
  36 #include <sys/kernel.h>
  37 #include <sys/systm.h>
  38 #include <sys/device.h>
  39
  40 #include <machine/cpu.h>
  41 #include <machine/bus.h>
  42 #include <machine/sbdiovar.h>
  43
  44 #include <dev/clock_subr.h>
  45
  46 #include <dev/ic/mk48txxreg.h>
  47 #include <dev/ic/mk48txxvar.h>
  48
  49 #include "ioconf.h"
  50
  51 #define MKCLOCK_SBD_STRIDE      2
  52
  53 int  mkclock_sbdio_match(device_t, cfdata_t, void *);
  54 void mkclock_sbdio_attach(device_t, device_t, void *);
  55 static uint8_t mkclock_sbdio_nvrd(struct mk48txx_softc *, int);
  56 static void mkclock_sbdio_nvwr(struct mk48txx_softc *, int, uint8_t);
  57
  58 CFATTACH_DECL_NEW(mkclock_sbdio, sizeof(struct mk48txx_softc),
  59     mkclock_sbdio_match, mkclock_sbdio_attach, NULL, NULL);
  60
  61 int
  62 mkclock_sbdio_match(device_t parent, cfdata_t cf, void *aux)
  63 {
  64         struct sbdio_attach_args *sa = aux;
  65
  66         if (strcmp("mkclock", sa->sa_name) != 0)
  67                 return 0;
  68
  69         return 1;
  70 }
  71
  72 void
  73 mkclock_sbdio_attach(device_t parent, device_t self, void *aux)
  74 {
  75         struct mk48txx_softc *sc = device_private(self);
  76         struct sbdio_attach_args *sa = aux;
  77         bus_size_t size;
  78
  79         sc->sc_dev = self;
  80         switch (sa->sa_flags) {
  81         case 0x0000:
  82                 sc->sc_model = "mk48t08";
  83                 size = MK48T08_CLKSZ;
  84                 break;
  85
  86         case 0x0001:
  87                 sc->sc_model = "mk48t18";
  88                 size = MK48T18_CLKSZ;
  89                 break;
  90
  91         default:
  92                 /* assume MK48T18 */
  93                 sc->sc_model = "mk48t18";
  94                 size = MK48T18_CLKSZ;
  95                 break;
  96         }
  97
  98         sc->sc_bst = sa->sa_bust;
  99         if (bus_space_map(sc->sc_bst, sa->sa_addr1, size, 0,
 100             &sc->sc_bsh) != 0) {
 101                 aprint_error(": can't map device space\n");
 102                 return;
 103         }
 104
 105         sc->sc_year0 = 2000;    /* XXX Is this OK? */
 106         sc->sc_nvrd = mkclock_sbdio_nvrd;
 107         sc->sc_nvwr = mkclock_sbdio_nvwr;
 108
 109         mk48txx_attach(sc);
 110
 111         aprint_normal("\n");
 112 }
 113
 114 static uint8_t
 115 mkclock_sbdio_nvrd(struct mk48txx_softc *sc, int off)
 116 {
 117         uint8_t rv;
 118
 119         rv = bus_space_read_1(sc->sc_bst, sc->sc_bsh,
 120             off << MKCLOCK_SBD_STRIDE);
 121         return rv;
 122 }
 123
 124 static void
 125 mkclock_sbdio_nvwr(struct mk48txx_softc *sc, int off, uint8_t v)
 126 {
 127
 128         bus_space_write_1(sc->sc_bst, sc->sc_bsh, off << MKCLOCK_SBD_STRIDE, v);
 129 }