NetBSD-5.0.2/sys/dev/ic/mk48txx.c
/* $NetBSD: mk48txx.c,v 1.25 2008/04/28 20:23:50 martin Exp $ */
/*-
* Copyright (c) 2000 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Paul Kranenburg.
*
* 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.
*/
/*
* Mostek MK48T02, MK48T08, MK48T59 time-of-day chip subroutines.
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: mk48txx.c,v 1.25 2008/04/28 20:23:50 martin Exp $");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/device.h>
#include <sys/errno.h>
#include <sys/bus.h>
#include <dev/clock_subr.h>
#include <dev/ic/mk48txxreg.h>
#include <dev/ic/mk48txxvar.h>
int mk48txx_gettime_ymdhms(todr_chip_handle_t, struct clock_ymdhms *);
int mk48txx_settime_ymdhms(todr_chip_handle_t, struct clock_ymdhms *);
uint8_t mk48txx_def_nvrd(struct mk48txx_softc *, int);
void mk48txx_def_nvwr(struct mk48txx_softc *, int, uint8_t);
struct {
const char *name;
bus_size_t nvramsz;
bus_size_t clkoff;
int flags;
#define MK48TXX_EXT_REGISTERS 1 /* Has extended register set */
} mk48txx_models[] = {
{ "mk48t02", MK48T02_CLKSZ, MK48T02_CLKOFF, 0 },
{ "mk48t08", MK48T08_CLKSZ, MK48T08_CLKOFF, 0 },
{ "mk48t18", MK48T18_CLKSZ, MK48T18_CLKOFF, 0 },
{ "mk48t59", MK48T59_CLKSZ, MK48T59_CLKOFF, MK48TXX_EXT_REGISTERS },
};
void
mk48txx_attach(struct mk48txx_softc *sc)
{
todr_chip_handle_t handle;
int i;
aprint_normal(": %s", sc->sc_model);
i = __arraycount(mk48txx_models);
while (--i >= 0) {
if (strcmp(sc->sc_model, mk48txx_models[i].name) == 0)
break;
}
if (i < 0)
panic("%s: unsupported model", __func__);
sc->sc_nvramsz = mk48txx_models[i].nvramsz;
sc->sc_clkoffset = mk48txx_models[i].clkoff;
handle = &sc->sc_handle;
handle->cookie = sc;
handle->todr_gettime = NULL;
handle->todr_settime = NULL;
handle->todr_gettime_ymdhms = mk48txx_gettime_ymdhms;
handle->todr_settime_ymdhms = mk48txx_settime_ymdhms;
if (sc->sc_nvrd == NULL)
sc->sc_nvrd = mk48txx_def_nvrd;
if (sc->sc_nvwr == NULL)
sc->sc_nvwr = mk48txx_def_nvwr;
todr_attach(handle);
}
/*
* Get time-of-day and convert to a `struct timeval'
* Return 0 on success; an error number otherwise.
*/
int
mk48txx_gettime_ymdhms(todr_chip_handle_t handle, struct clock_ymdhms *dt)
{
struct mk48txx_softc *sc;
bus_size_t clkoff;
int year;
uint8_t csr;
sc = handle->cookie;
clkoff = sc->sc_clkoffset;
todr_wenable(handle, 1);
/* enable read (stop time) */
csr = (*sc->sc_nvrd)(sc, clkoff + MK48TXX_ICSR);
csr |= MK48TXX_CSR_READ;
(*sc->sc_nvwr)(sc, clkoff + MK48TXX_ICSR, csr);
dt->dt_sec = FROMBCD((*sc->sc_nvrd)(sc, clkoff + MK48TXX_ISEC));
dt->dt_min = FROMBCD((*sc->sc_nvrd)(sc, clkoff + MK48TXX_IMIN));
dt->dt_hour = FROMBCD((*sc->sc_nvrd)(sc, clkoff + MK48TXX_IHOUR));
dt->dt_day = FROMBCD((*sc->sc_nvrd)(sc, clkoff + MK48TXX_IDAY));
dt->dt_wday = FROMBCD((*sc->sc_nvrd)(sc, clkoff + MK48TXX_IWDAY));
dt->dt_mon = FROMBCD((*sc->sc_nvrd)(sc, clkoff + MK48TXX_IMON));
year = FROMBCD((*sc->sc_nvrd)(sc, clkoff + MK48TXX_IYEAR));
year += sc->sc_year0;
if (year < POSIX_BASE_YEAR &&
(sc->sc_flag & MK48TXX_NO_CENT_ADJUST) == 0)
year += 100;
dt->dt_year = year;
/* time wears on */
csr = (*sc->sc_nvrd)(sc, clkoff + MK48TXX_ICSR);
csr &= ~MK48TXX_CSR_READ;
(*sc->sc_nvwr)(sc, clkoff + MK48TXX_ICSR, csr);
todr_wenable(handle, 0);
return 0;
}
/*
* Set the time-of-day clock based on the value of the `struct timeval' arg.
* Return 0 on success; an error number otherwise.
*/
int
mk48txx_settime_ymdhms(todr_chip_handle_t handle, struct clock_ymdhms *dt)
{
struct mk48txx_softc *sc;
bus_size_t clkoff;
uint8_t csr;
int year;
sc = handle->cookie;
clkoff = sc->sc_clkoffset;
year = dt->dt_year - sc->sc_year0;
if (year > 99 &&
(sc->sc_flag & MK48TXX_NO_CENT_ADJUST) == 0)
year -= 100;
todr_wenable(handle, 1);
/* enable write */
csr = (*sc->sc_nvrd)(sc, clkoff + MK48TXX_ICSR);
csr |= MK48TXX_CSR_WRITE;
(*sc->sc_nvwr)(sc, clkoff + MK48TXX_ICSR, csr);
(*sc->sc_nvwr)(sc, clkoff + MK48TXX_ISEC, TOBCD(dt->dt_sec));
(*sc->sc_nvwr)(sc, clkoff + MK48TXX_IMIN, TOBCD(dt->dt_min));
(*sc->sc_nvwr)(sc, clkoff + MK48TXX_IHOUR, TOBCD(dt->dt_hour));
(*sc->sc_nvwr)(sc, clkoff + MK48TXX_IWDAY, TOBCD(dt->dt_wday));
(*sc->sc_nvwr)(sc, clkoff + MK48TXX_IDAY, TOBCD(dt->dt_day));
(*sc->sc_nvwr)(sc, clkoff + MK48TXX_IMON, TOBCD(dt->dt_mon));
(*sc->sc_nvwr)(sc, clkoff + MK48TXX_IYEAR, TOBCD(year));
/* load them up */
csr = (*sc->sc_nvrd)(sc, clkoff + MK48TXX_ICSR);
csr &= ~MK48TXX_CSR_WRITE;
(*sc->sc_nvwr)(sc, clkoff + MK48TXX_ICSR, csr);
todr_wenable(handle, 0);
return 0;
}
int
mk48txx_get_nvram_size(todr_chip_handle_t handle, bus_size_t *vp)
{
struct mk48txx_softc *sc;
sc = handle->cookie;
*vp = sc->sc_nvramsz;
return 0;
}
uint8_t
mk48txx_def_nvrd(struct mk48txx_softc *sc, int off)
{
return bus_space_read_1(sc->sc_bst, sc->sc_bsh, off);
}
void
mk48txx_def_nvwr(struct mk48txx_softc *sc, int off, uint8_t v)
{
bus_space_write_1(sc->sc_bst, sc->sc_bsh, off, v);
}