/* $NetBSD: dpclock.c,v 1.6 2015/02/18 16:47:58 macallan Exp $ */
/*
* Copyright (c) 2001 Erik Reid
* Copyright (c) 2001 Rafal K. Boni
* Copyright (c) 2001 Christopher Sekiya
* Copyright (c) 1998, 1999, 2000 The NetBSD Foundation, Inc.
* All rights reserved.
*
* Portions of this code are derived from software contributed to The
* NetBSD Foundation by Jason R. Thorpe of the Numerical Aerospace
* Simulation Facility, NASA Ames Research Center.
*
* 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.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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/param.h>
#include <sys/kernel.h>
#include <sys/systm.h>
#include <sys/device.h>
#include <sys/bus.h>
#include <machine/autoconf.h>
#include <machine/sysconf.h>
#include <machine/machtype.h>
#include <dev/clock_subr.h>
#include <sgimips/dev/dp8573areg.h>
#include <sgimips/sgimips/clockvar.h>
struct dpclock_softc {
struct todr_chip_handle sc_todrch;
/* RTC registers */
bus_space_tag_t sc_rtct;
bus_space_handle_t sc_rtch;
int sc_offset;
};
static int dpclock_match(device_t, cfdata_t, void *);
static void dpclock_attach(device_t, device_t, void *);
static int dpclock_gettime(struct todr_chip_handle *, struct timeval *);
static int dpclock_settime(struct todr_chip_handle *, struct timeval *);
CFATTACH_DECL_NEW(dpclock, sizeof(struct dpclock_softc),
dpclock_match, dpclock_attach, NULL, NULL);
static int
dpclock_match(device_t parent, cfdata_t cf, void *aux)
{
struct mainbus_attach_args *ma = aux;
switch (mach_type) {
case MACH_SGI_IP6 | MACH_SGI_IP10:
if (ma->ma_addr == 0x1fbc0000)
return (1);
break;
case MACH_SGI_IP12:
case MACH_SGI_IP20:
if (ma->ma_addr == 0x1fb80e00)
return (1);
break;
}
return (0);
}
static void
writereg(struct dpclock_softc *sc, uint32_t reg, uint8_t val)
{
bus_space_write_1(sc->sc_rtct, sc->sc_rtch,
(reg << 2) + sc->sc_offset, val);
}
static uint8_t
readreg(struct dpclock_softc *sc, uint32_t reg)
{
return bus_space_read_1(sc->sc_rtct, sc->sc_rtch,
(reg << 2) + sc->sc_offset);
}
static void
dpclock_attach(device_t parent, device_t self, void *aux)
{
struct dpclock_softc *sc = device_private(self);
struct mainbus_attach_args *ma = aux;
int err;
printf("\n");
sc->sc_rtct = normal_memt;
/*
* All machines have one byte register per word. IP6/IP10 use
* the MSB, others the LSB.
*/
if (mach_type == MACH_SGI_IP12 || mach_type == MACH_SGI_IP20)
sc->sc_offset = 3;
else
sc->sc_offset = 0;
if ((err = bus_space_map(sc->sc_rtct, ma->ma_addr, 0x1ffff,
BUS_SPACE_MAP_LINEAR, &sc->sc_rtch)) != 0) {
printf(": unable to map RTC registers, error = %d\n", err);
return;
}
sc->sc_todrch.cookie = sc;
sc->sc_todrch.todr_gettime = dpclock_gettime;
sc->sc_todrch.todr_settime = dpclock_settime;
sc->sc_todrch.todr_setwen = NULL;
todr_attach(&sc->sc_todrch);
}
/*
* Get the time of day, based on the clock's value and/or the base value.
*/
static int
dpclock_gettime(struct todr_chip_handle *todrch, struct timeval *tv)
{
struct dpclock_softc *sc = (struct dpclock_softc *)todrch->cookie;
struct clock_ymdhms dt;
int s;
u_int8_t i, j;
u_int8_t regs[32];
s = splhigh();
i = readreg(sc, DP8573A_TIMESAVE_CTL);
j = i | DP8573A_TIMESAVE_CTL_EN;
writereg(sc, DP8573A_TIMESAVE_CTL, j);
writereg(sc, DP8573A_TIMESAVE_CTL, i);
splx(s);
for (i = 0; i < 32; i++)
regs[i] = readreg(sc, i);
dt.dt_sec = bcdtobin(regs[DP8573A_SAVE_SEC]);
dt.dt_min = bcdtobin(regs[DP8573A_SAVE_MIN]);
if (regs[DP8573A_RT_MODE] & DP8573A_RT_MODE_1224) {
dt.dt_hour = bcdtobin(regs[DP8573A_SAVE_HOUR] &
DP8573A_HOUR_12HR_MASK) +
((regs[DP8573A_SAVE_HOUR] & DP8573A_RT_MODE_1224) ? 0 : 12);
/*
* In AM/PM mode, hour range is 01-12, so adding in 12 hours
* for PM gives us 01-24, whereas we want 00-23, so map hour
* 24 to hour 0.
*/
if (dt.dt_hour == 24)
dt.dt_hour = 0;
} else {
dt.dt_hour = bcdtobin(regs[DP8573A_SAVE_HOUR] &
DP8573A_HOUR_24HR_MASK);
}
dt.dt_wday = bcdtobin(regs[DP8573A_DOW]); /* Not from time saved */
dt.dt_day = bcdtobin(regs[DP8573A_SAVE_DOM]);
dt.dt_mon = bcdtobin(regs[DP8573A_SAVE_MONTH]);
dt.dt_year = FROM_IRIX_YEAR(bcdtobin(regs[DP8573A_YEAR]));
/* simple sanity checks */
if (dt.dt_mon > 12 || dt.dt_day > 31 ||
dt.dt_hour >= 24 || dt.dt_min >= 60 || dt.dt_sec >= 60)
return (EIO);
tv->tv_sec = (long)clock_ymdhms_to_secs(&dt);
if (tv->tv_sec == -1)
return (ERANGE);
tv->tv_usec = 0;
return (0);
}
/*
* Reset the TODR based on the time value.
*/
static int
dpclock_settime(struct todr_chip_handle *todrch, struct timeval *tv)
{
struct dpclock_softc *sc = (struct dpclock_softc *)todrch->cookie;
struct clock_ymdhms dt;
int s;
u_int8_t i, j;
u_int8_t regs[32];
clock_secs_to_ymdhms((time_t)(tv->tv_sec + (tv->tv_usec > 500000)),&dt);
s = splhigh();
i = readreg(sc, DP8573A_TIMESAVE_CTL);
j = i | DP8573A_TIMESAVE_CTL_EN;
writereg(sc, DP8573A_TIMESAVE_CTL, j);
writereg(sc, DP8573A_TIMESAVE_CTL, i);
splx(s);
for (i = 0; i < 32; i++)
regs[i] = readreg(sc, i);
regs[DP8573A_SUBSECOND] = 0;
regs[DP8573A_SECOND] = bintobcd(dt.dt_sec);
regs[DP8573A_MINUTE] = bintobcd(dt.dt_min);
regs[DP8573A_HOUR] = bintobcd(dt.dt_hour) & DP8573A_HOUR_24HR_MASK;
regs[DP8573A_DOW] = bintobcd(dt.dt_wday);
regs[DP8573A_DOM] = bintobcd(dt.dt_day);
regs[DP8573A_MONTH] = bintobcd(dt.dt_mon);
regs[DP8573A_YEAR] = bintobcd(TO_IRIX_YEAR(dt.dt_year));
s = splhigh();
i = readreg(sc, DP8573A_RT_MODE);
j = i & ~DP8573A_RT_MODE_CLKSS;
writereg(sc, DP8573A_RT_MODE, j);
for (i = 0; i < 10; i++)
writereg(sc, DP8573A_COUNTERS +i, regs[DP8573A_COUNTERS + i]);
writereg(sc, DP8573A_RT_MODE, i);
splx(s);
return (0);
}