/*      $NetBSD: mkclock_sbdio.c,v 1.7 2008/04/28 20:23:18 martin Exp $ */

/*-
* Copyright (c) 1996 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Jason R. Thorpe.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
*    notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
*    notice, this list of conditions and the following disclaimer in the
*    documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: mkclock_sbdio.c,v 1.7 2008/04/28 20:23:18 martin Exp $");

#include <sys/param.h>
#include <sys/kernel.h>
#include <sys/systm.h>
#include <sys/device.h>

#include <machine/cpu.h>
#include <machine/bus.h>
#include <machine/sbdiovar.h>

#include <dev/clock_subr.h>

#include <dev/ic/mk48txxreg.h>
#include <dev/ic/mk48txxvar.h>

#include "ioconf.h"

#define MKCLOCK_SBD_STRIDE      2

int  mkclock_sbdio_match(device_t, cfdata_t, void *);
void mkclock_sbdio_attach(device_t, device_t, void *);
static uint8_t mkclock_sbdio_nvrd(struct mk48txx_softc *, int);
static void mkclock_sbdio_nvwr(struct mk48txx_softc *, int, uint8_t);

CFATTACH_DECL_NEW(mkclock_sbdio, sizeof(struct mk48txx_softc),
   mkclock_sbdio_match, mkclock_sbdio_attach, NULL, NULL);

int
mkclock_sbdio_match(device_t parent, cfdata_t cf, void *aux)
{
       struct sbdio_attach_args *sa = aux;

       if (strcmp("mkclock", sa->sa_name) != 0)
               return 0;

       return 1;
}

void
mkclock_sbdio_attach(device_t parent, device_t self, void *aux)
{
       struct mk48txx_softc *sc = device_private(self);
       struct sbdio_attach_args *sa = aux;
       bus_size_t size;

       sc->sc_dev = self;
       switch (sa->sa_flags) {
       case 0x0000:
               sc->sc_model = "mk48t08";
               size = MK48T08_CLKSZ;
               break;

       case 0x0001:
               sc->sc_model = "mk48t18";
               size = MK48T18_CLKSZ;
               break;

       default:
               /* assume MK48T18 */
               sc->sc_model = "mk48t18";
               size = MK48T18_CLKSZ;
               break;
       }

       sc->sc_bst = sa->sa_bust;
       if (bus_space_map(sc->sc_bst, sa->sa_addr1, size, 0,
           &sc->sc_bsh) != 0) {
               aprint_error(": can't map device space\n");
               return;
       }

       sc->sc_year0 = 2000;    /* XXX Is this OK? */
       sc->sc_nvrd = mkclock_sbdio_nvrd;
       sc->sc_nvwr = mkclock_sbdio_nvwr;

       mk48txx_attach(sc);

       aprint_normal("\n");
}

static uint8_t
mkclock_sbdio_nvrd(struct mk48txx_softc *sc, int off)
{
       uint8_t rv;

       rv = bus_space_read_1(sc->sc_bst, sc->sc_bsh,
           off << MKCLOCK_SBD_STRIDE);
       return rv;
}

static void
mkclock_sbdio_nvwr(struct mk48txx_softc *sc, int off, uint8_t v)
{

       bus_space_write_1(sc->sc_bst, sc->sc_bsh, off << MKCLOCK_SBD_STRIDE, v);
}