255 lines
7.5 KiB
C
255 lines
7.5 KiB
C
/* $NetBSD: msm6242b.c,v 1.3 2013/12/04 07:48:59 rkujawa Exp $ */
|
|
|
|
/*-
|
|
* Copyright (c) 2012 The NetBSD Foundation, Inc.
|
|
* All rights reserved.
|
|
*
|
|
* This code is derived from software contributed to The NetBSD Foundation
|
|
* by Radoslaw Kujawa.
|
|
*
|
|
* 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: msm6242b.c,v 1.3 2013/12/04 07:48:59 rkujawa Exp $");
|
|
|
|
/*
|
|
* Driver for OKI MSM6242B Real Time Clock. Somewhat based on an ancient, amiga
|
|
* specifc a2kbbc driver (which was turned into frontend to this driver).
|
|
*/
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/device.h>
|
|
#include <sys/bus.h>
|
|
|
|
#include <dev/clock_subr.h>
|
|
|
|
#include <dev/ic/msm6242bvar.h>
|
|
#include <dev/ic/msm6242breg.h>
|
|
|
|
/* #define MSM6242B_DEBUG 1 */
|
|
|
|
static int msm6242b_gettime_ymdhms(todr_chip_handle_t, struct clock_ymdhms *);
|
|
int msm6242b_settime_ymdhms(todr_chip_handle_t, struct clock_ymdhms *);
|
|
|
|
bool msm6242b_hold(struct msm6242b_softc *sc);
|
|
void msm6242b_free(struct msm6242b_softc *sc);
|
|
static uint8_t msm6242b_read(struct msm6242b_softc *, uint8_t);
|
|
static void msm6242b_write(struct msm6242b_softc *, uint8_t, uint8_t);
|
|
static void msm6242b_set(struct msm6242b_softc *, uint8_t, uint8_t);
|
|
static void msm6242b_unset(struct msm6242b_softc *, uint8_t, uint8_t);
|
|
|
|
void
|
|
msm6242b_attach(struct msm6242b_softc *sc)
|
|
{
|
|
struct clock_ymdhms dt;
|
|
|
|
todr_chip_handle_t handle;
|
|
aprint_normal(": OKI MSM6242B\n");
|
|
|
|
handle = &sc->sc_handle;
|
|
handle->cookie = sc;
|
|
handle->todr_gettime = NULL;
|
|
handle->todr_settime = NULL;
|
|
handle->todr_gettime_ymdhms = msm6242b_gettime_ymdhms;
|
|
handle->todr_settime_ymdhms = msm6242b_settime_ymdhms;
|
|
handle->todr_setwen = NULL;
|
|
|
|
if (msm6242b_gettime_ymdhms(handle, &dt) != 0) {
|
|
aprint_error_dev(sc->sc_dev, "RTC does not work correctly\n");
|
|
return;
|
|
}
|
|
|
|
#ifdef MSM6242B_DEBUG
|
|
aprint_normal_dev(sc->sc_dev, "the time is %d %d %d %d %d %d\n",
|
|
dt.dt_year, dt.dt_mon, dt.dt_day, dt.dt_hour, dt.dt_min, dt.dt_sec);
|
|
#endif /* MSM6242B_DEBUG */
|
|
todr_attach(handle);
|
|
}
|
|
|
|
static int
|
|
msm6242b_gettime_ymdhms(todr_chip_handle_t handle, struct clock_ymdhms *dt)
|
|
{
|
|
struct msm6242b_softc *sc;
|
|
|
|
sc = handle->cookie;
|
|
/* XXX: splsched(); */
|
|
|
|
if(!msm6242b_hold(sc))
|
|
return (ENXIO);
|
|
|
|
dt->dt_sec = msm6242b_read(sc, MSM6242B_10SECOND) * 10 +
|
|
msm6242b_read(sc, MSM6242B_1SECOND);
|
|
dt->dt_min = msm6242b_read(sc, MSM6242B_10MINUTE) * 10 +
|
|
msm6242b_read(sc, MSM6242B_1MINUTE);
|
|
dt->dt_hour = (msm6242b_read(sc, MSM6242B_10HOUR_PMAM) &
|
|
MSM6242B_10HOUR_MASK) * 10 + msm6242b_read(sc, MSM6242B_1HOUR);
|
|
dt->dt_day = msm6242b_read(sc, MSM6242B_10DAY) * 10 +
|
|
msm6242b_read(sc, MSM6242B_1DAY);
|
|
dt->dt_mon = msm6242b_read(sc, MSM6242B_10MONTH) * 10 +
|
|
msm6242b_read(sc, MSM6242B_1MONTH);
|
|
dt->dt_year = msm6242b_read(sc, MSM6242B_10YEAR) * 10 +
|
|
msm6242b_read(sc, MSM6242B_1YEAR);
|
|
dt->dt_wday = msm6242b_read(sc, MSM6242B_WEEK);
|
|
|
|
#ifdef MSM6242B_DEBUG
|
|
aprint_normal_dev(sc->sc_dev, "the time is %d %d %d %d %d %d\n",
|
|
dt->dt_year, dt->dt_mon, dt->dt_day, dt->dt_hour, dt->dt_min, dt->dt_sec);
|
|
#endif /* MSM6242B_DEBUG */
|
|
|
|
/* handle 12h mode */
|
|
if ((msm6242b_read(sc, MSM6242B_CONTROL_F) &
|
|
MSM6242B_CONTROL_F_24H) == 0) {
|
|
if ((msm6242b_read(sc, MSM6242B_10HOUR_PMAM) &
|
|
MSM6242B_PMAM_BIT) == 0 && dt->dt_hour == 12)
|
|
dt->dt_hour = 0;
|
|
else if ((msm6242b_read(sc, MSM6242B_10HOUR_PMAM) &
|
|
MSM6242B_PMAM_BIT) && dt->dt_hour != 12);
|
|
dt->dt_hour += 12;
|
|
}
|
|
|
|
msm6242b_free(sc);
|
|
|
|
dt->dt_year += MSM6242B_BASE_YEAR;
|
|
if (dt->dt_year < POSIX_BASE_YEAR)
|
|
dt->dt_year += 100;
|
|
|
|
if ((dt->dt_hour > 23) ||
|
|
(dt->dt_day > 31) ||
|
|
(dt->dt_mon > 12) ||
|
|
(dt->dt_year > 2036))
|
|
return (EINVAL);
|
|
|
|
return 0;
|
|
}
|
|
|
|
bool
|
|
msm6242b_hold(struct msm6242b_softc *sc)
|
|
{
|
|
int try;
|
|
|
|
#define TRY_MAX 10
|
|
for (try = 0; try < TRY_MAX; try++) {
|
|
msm6242b_set(sc, MSM6242B_CONTROL_D, MSM6242B_CONTROL_D_HOLD);
|
|
if (msm6242b_read(sc, MSM6242B_CONTROL_D)
|
|
& MSM6242B_CONTROL_D_BUSY) {
|
|
#ifdef MSM6242B_DEBUG
|
|
aprint_normal_dev(sc->sc_dev, "gotta idle\n");
|
|
#endif /* MSM6242B_DEBUG */
|
|
msm6242b_unset(sc, MSM6242B_CONTROL_D,
|
|
MSM6242B_CONTROL_D_HOLD);
|
|
delay(70);
|
|
} else {
|
|
#ifdef MSM6242B_DEBUG
|
|
aprint_normal_dev(sc->sc_dev, "not busy\n");
|
|
#endif /* MSM6242B_DEBUG */
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (try == TRY_MAX) {
|
|
aprint_error_dev(sc->sc_dev, "can't hold the chip\n");
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
void
|
|
msm6242b_free(struct msm6242b_softc *sc)
|
|
{
|
|
msm6242b_unset(sc, MSM6242B_CONTROL_D, MSM6242B_CONTROL_D_HOLD);
|
|
}
|
|
|
|
static uint8_t
|
|
msm6242b_read(struct msm6242b_softc *sc, uint8_t reg)
|
|
{
|
|
uint8_t r;
|
|
r = bus_space_read_1(sc->sc_iot, sc->sc_ioh, reg) & MSM6242B_MASK;
|
|
return r;
|
|
}
|
|
|
|
static void
|
|
msm6242b_write(struct msm6242b_softc *sc, uint8_t reg, uint8_t val)
|
|
{
|
|
bus_space_write_1(sc->sc_iot, sc->sc_ioh, reg, val);
|
|
}
|
|
|
|
static void
|
|
msm6242b_set(struct msm6242b_softc *sc, uint8_t reg, uint8_t bits)
|
|
{
|
|
uint8_t v;
|
|
v = msm6242b_read(sc, reg) | bits;
|
|
msm6242b_write(sc, reg, v);
|
|
}
|
|
|
|
static void
|
|
msm6242b_unset(struct msm6242b_softc *sc, uint8_t reg, uint8_t bits)
|
|
{
|
|
uint8_t v;
|
|
v = msm6242b_read(sc, reg) & ~bits;
|
|
msm6242b_write(sc, reg, v);
|
|
}
|
|
|
|
int
|
|
msm6242b_settime_ymdhms(todr_chip_handle_t handle, struct clock_ymdhms *dt)
|
|
{
|
|
struct msm6242b_softc *sc;
|
|
int ampm;
|
|
/* XXX: splsched(); */
|
|
|
|
sc = handle->cookie;
|
|
|
|
if(!msm6242b_hold(sc))
|
|
return (ENXIO);
|
|
|
|
ampm = 0;
|
|
if ((msm6242b_read(sc, MSM6242B_CONTROL_F) &
|
|
MSM6242B_CONTROL_F_24H) == 0) {
|
|
if (dt->dt_hour >= 12) {
|
|
ampm = MSM6242B_CONTROL_F_24H;
|
|
if (dt->dt_hour != 12)
|
|
dt->dt_hour -= 12;
|
|
} else if (dt->dt_hour == 0) {
|
|
dt->dt_hour = 12;
|
|
}
|
|
}
|
|
|
|
msm6242b_write(sc, MSM6242B_10HOUR_PMAM, (dt->dt_hour / 10) | ampm);
|
|
msm6242b_write(sc, MSM6242B_1HOUR, dt->dt_hour % 10);
|
|
msm6242b_write(sc, MSM6242B_10SECOND, dt->dt_sec / 10);
|
|
msm6242b_write(sc, MSM6242B_1SECOND, dt->dt_sec % 10);
|
|
msm6242b_write(sc, MSM6242B_10MINUTE, dt->dt_min / 10);
|
|
msm6242b_write(sc, MSM6242B_1MINUTE, dt->dt_min % 10);
|
|
msm6242b_write(sc, MSM6242B_10DAY, dt->dt_day / 10);
|
|
msm6242b_write(sc, MSM6242B_1DAY, dt->dt_day % 10);
|
|
msm6242b_write(sc, MSM6242B_10MONTH, dt->dt_mon / 10);
|
|
msm6242b_write(sc, MSM6242B_1MONTH, dt->dt_mon % 10);
|
|
msm6242b_write(sc, MSM6242B_10YEAR, (dt->dt_year / 10) % 10);
|
|
msm6242b_write(sc, MSM6242B_1YEAR, dt->dt_year % 10);
|
|
msm6242b_write(sc, MSM6242B_WEEK, dt->dt_wday);
|
|
|
|
msm6242b_free(sc);
|
|
|
|
return 0;
|
|
}
|
|
|