sys/arch/newsmips/apbus/mkclock_ap.c

   1 /*      $NetBSD: mkclock_ap.c,v 1.8 2008/03/29 14:34:13 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_ap.c,v 1.8 2008/03/29 14:34:13 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
  43 #include <dev/clock_subr.h>
  44 #include <dev/ic/mk48txxreg.h>
  45 #include <dev/ic/mk48txxvar.h>
  46
  47 #include <newsmips/apbus/apbusvar.h>
  48
  49 #define MKCLOCK_AP_STRIDE       2
  50 #define MKCLOCK_AP_OFFSET       \
  51     ((MK48T02_CLKOFF + MK48TXX_ICSR) << MKCLOCK_AP_STRIDE)
  52
  53 int  mkclock_ap_match(device_t, cfdata_t, void *);
  54 void mkclock_ap_attach(device_t, device_t, void *);
  55 static uint8_t mkclock_ap_nvrd(struct mk48txx_softc *, int);
  56 static void mkclock_ap_nvwr(struct mk48txx_softc *, int, uint8_t);
  57
  58 CFATTACH_DECL_NEW(mkclock_ap, sizeof(struct mk48txx_softc),
  59     mkclock_ap_match, mkclock_ap_attach, NULL, NULL);
  60
  61 int
  62 mkclock_ap_match(device_t parent, cfdata_t cf, void *aux)
  63 {
  64         struct apbus_attach_args *apa = aux;
  65
  66         if (strcmp("clock", apa->apa_name) != 0)
  67                 return 0;
  68
  69         return 1;
  70 }
  71
  72 void
  73 mkclock_ap_attach(device_t parent, device_t self, void *aux)
  74 {
  75         struct mk48txx_softc *sc = device_private(self);
  76         struct apbus_attach_args *apa = aux;
  77
  78         sc->sc_dev = self;
  79         aprint_normal(" slot%d addr 0x%lx", apa->apa_slotno, apa->apa_hwbase);
  80         if (bus_space_map(sc->sc_bst, apa->apa_hwbase - MKCLOCK_AP_OFFSET,
  81             MK48T02_CLKSZ, 0, &sc->sc_bsh) != 0)
  82                 aprint_error(": can't map device space\n");
  83
  84         sc->sc_model = "mk48t02";
  85         sc->sc_year0 = 1900;
  86         sc->sc_nvrd = mkclock_ap_nvrd;
  87         sc->sc_nvwr = mkclock_ap_nvwr;
  88
  89         mk48txx_attach(sc);
  90
  91         aprint_normal("\n");
  92 }
  93
  94 static uint8_t
  95 mkclock_ap_nvrd(struct mk48txx_softc *sc, int off)
  96 {
  97         uint8_t rv;
  98
  99         rv = bus_space_read_4(sc->sc_bst, sc->sc_bsh, off << MKCLOCK_AP_STRIDE);
 100         return rv;
 101 }
 102
 103 static void
 104 mkclock_ap_nvwr(struct mk48txx_softc *sc, int off, uint8_t v)
 105 {
 106
 107         bus_space_write_4(sc->sc_bst, sc->sc_bsh, off << MKCLOCK_AP_STRIDE, v);
 108 }