196 lines
5.0 KiB
C
196 lines
5.0 KiB
C
/*-
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* Copyright (c) 2002 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by UCHIYAMA Yasushi.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the NetBSD
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* Foundation, Inc. and its contributors.
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* 4. Neither the name of The NetBSD Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: rtc.c,v 1.1 2006/09/20 00:41:11 uwe Exp $");
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#include <sys/param.h>
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#include <sys/kernel.h>
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#include <sys/device.h>
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#include <sys/malloc.h>
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#include <sys/systm.h>
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#ifdef GPROF
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#include <sys/gmon.h>
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#endif
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#include <dev/clock_subr.h>
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#include <sh3/rtcreg.h>
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struct rtc_softc {
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struct device sc_dev;
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struct todr_chip_handle sc_todr;
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};
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static int rtc_match(struct device *, struct cfdata *, void *);
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static void rtc_attach(struct device *, struct device *, void *);
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CFATTACH_DECL(rtc, sizeof(struct rtc_softc),
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rtc_match, rtc_attach, NULL, NULL);
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/* todr(9) methods */
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static int rtc_gettime_ymdhms(todr_chip_handle_t, struct clock_ymdhms *);
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static int rtc_settime_ymdhms(todr_chip_handle_t, struct clock_ymdhms *);
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static int
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rtc_match(struct device *parent, struct cfdata *cfp, void *aux)
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{
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return 1;
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}
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static void
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rtc_attach(struct device *parent, struct device *self, void *aux)
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{
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struct rtc_softc *sc = (void *)self;
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printf("\n");
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/* Make sure RTC is started */
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_reg_write_1(SH_(RCR2), SH_RCR2_ENABLE | SH_RCR2_START);
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#ifdef RTC_DEBUG
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{
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struct clock_ymdhms dt;
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int error;
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error = rtc_gettime_ymdhms(NULL, &dt);
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if (error)
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printf("%s: error %d\n", sc->sc_dev.dv_xname, error);
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else
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printf("%s: %04d-%02d-%02d %02d:%02d:%02d\n",
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sc->sc_dev.dv_xname,
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dt.dt_year, dt.dt_mon, dt.dt_day,
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dt.dt_hour, dt.dt_min, dt.dt_sec);
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}
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#endif
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sc->sc_todr.cookie = sc;
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sc->sc_todr.todr_gettime_ymdhms = rtc_gettime_ymdhms;
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sc->sc_todr.todr_settime_ymdhms = rtc_settime_ymdhms;
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todr_attach(&sc->sc_todr);
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}
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static int
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rtc_gettime_ymdhms(todr_chip_handle_t h, struct clock_ymdhms *dt)
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{
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unsigned int year;
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int retry = 8;
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/* disable carry interrupt */
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_reg_bclr_1(SH_(RCR1), SH_RCR1_CIE);
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do {
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uint8_t r = _reg_read_1(SH_(RCR1));
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r &= ~SH_RCR1_CF;
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r |= SH_RCR1_AF; /* don't clear alarm flag */
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_reg_write_1(SH_(RCR1), r);
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if (CPU_IS_SH3)
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year = _reg_read_1(SH3_RYRCNT);
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else
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year = _reg_read_2(SH4_RYRCNT) & 0x00ff;
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dt->dt_year = FROMBCD(year);
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/* read counter */
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#define RTCGET(x, y) \
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dt->dt_ ## x = FROMBCD(_reg_read_1(SH_(R ## y ## CNT)))
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RTCGET(mon, MON);
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RTCGET(wday, WK);
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RTCGET(day, DAY);
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RTCGET(hour, HR);
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RTCGET(min, MIN);
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RTCGET(sec, SEC);
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#undef RTCGET
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} while ((_reg_read_1(SH_(RCR1)) & SH_RCR1_CF) && --retry > 0);
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if (retry == 0)
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return EIO;
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dt->dt_year += 1900;
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if (dt->dt_year < POSIX_BASE_YEAR)
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dt->dt_year += 100;
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return 0;
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}
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static int
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rtc_settime_ymdhms(todr_chip_handle_t h, struct clock_ymdhms *dt)
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{
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unsigned int year;
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uint8_t r;
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year = TOBCD(dt->dt_year % 100);
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/* stop clock */
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r = _reg_read_1(SH_(RCR2));
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r |= SH_RCR2_RESET;
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r &= ~SH_RCR2_START;
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_reg_write_1(SH_(RCR2), r);
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/* set time */
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if (CPU_IS_SH3)
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_reg_write_1(SH3_RYRCNT, year);
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else
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_reg_write_2(SH4_RYRCNT, year);
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#define RTCSET(x, y) \
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_reg_write_1(SH_(R ## x ## CNT), TOBCD(dt->dt_ ## y))
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RTCSET(MON, mon);
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RTCSET(WK, wday);
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RTCSET(DAY, day);
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RTCSET(HR, hour);
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RTCSET(MIN, min);
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RTCSET(SEC, sec);
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#undef RTCSET
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/* start clock */
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_reg_write_1(SH_(RCR2), r | SH_RCR2_START);
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return 0;
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}
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