cc0ad78751
(1996, not 1900 or 2000) so handle the quirk by device properties and set it in MD device_register(). Also make RTC baseyear value patchable in sh3/dev/rtc.c. No visible changes to other sh3 RTC users.
272 lines
6.4 KiB
C
272 lines
6.4 KiB
C
/* $NetBSD: rtc.c,v 1.8 2010/05/22 15:51:32 tsutsui Exp $ */
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/*-
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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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*
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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 1.8 2010/05/22 15:51:32 tsutsui 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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#if defined(DEBUG) && !defined(RTC_DEBUG)
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#define RTC_DEBUG
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#endif
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struct rtc_softc {
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device_t sc_dev;
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int sc_valid;
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struct todr_chip_handle sc_todr;
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u_int sc_year0;
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};
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static int rtc_match(device_t, cfdata_t, void *);
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static void rtc_attach(device_t, device_t, void *);
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CFATTACH_DECL_NEW(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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#ifndef SH3_RTC_BASEYEAR
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#define SH3_RTC_BASEYEAR 1900
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#endif
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u_int sh3_rtc_baseyear = SH3_RTC_BASEYEAR;
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static int
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rtc_match(device_t parent, cfdata_t 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(device_t parent, device_t self, void *aux)
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{
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struct rtc_softc *sc;
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uint8_t r;
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prop_number_t prop_rtc_baseyear;
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#ifdef RTC_DEBUG
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char bits[128];
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#endif
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aprint_naive("\n");
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aprint_normal("\n");
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sc = device_private(self);
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sc->sc_dev = self;
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r = _reg_read_1(SH_(RCR2));
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#ifdef RTC_DEBUG
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snprintb(bits, sizeof(bits), SH_RCR2_BITS, r);
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aprint_debug_dev(sc->sc_dev, "RCR2=%s\n", bits);
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#endif
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/* Was the clock running? */
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if ((r & (SH_RCR2_ENABLE | SH_RCR2_START)) == (SH_RCR2_ENABLE
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| SH_RCR2_START))
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sc->sc_valid = 1;
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else {
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sc->sc_valid = 0;
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aprint_error_dev(sc->sc_dev, "WARNING: clock was stopped\n");
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}
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/* Disable carry and alarm interrupts */
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_reg_write_1(SH_(RCR1), 0);
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/* Clock runs, no periodic interrupts, no 30-sec adjustment */
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_reg_write_1(SH_(RCR2), SH_RCR2_ENABLE | SH_RCR2_START);
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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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prop_rtc_baseyear = prop_dictionary_get(device_properties(self),
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"sh3_rtc_baseyear");
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if (prop_rtc_baseyear != NULL) {
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sh3_rtc_baseyear =
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(u_int)prop_number_integer_value(prop_rtc_baseyear);
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#ifdef RTC_DEBUG
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aprint_debug_dev(self,
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"using baseyear %u passed via device property\n",
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sh3_rtc_baseyear);
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#endif
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}
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sc->sc_year0 = sh3_rtc_baseyear;
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todr_attach(&sc->sc_todr);
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#ifdef RTC_DEBUG
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{
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struct clock_ymdhms dt;
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rtc_gettime_ymdhms(&sc->sc_todr, &dt);
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}
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#endif
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if (!pmf_device_register(self, NULL, NULL))
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aprint_error_dev(self, "unable to establish power handler\n");
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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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struct rtc_softc *sc = h->cookie;
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unsigned int year;
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int retry = 8;
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if (!sc->sc_valid) {
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#ifdef RTC_DEBUG
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aprint_debug_dev(sc->sc_dev, "gettime: not valid\n");
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/* but proceed and read/print it anyway */
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#else
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return EIO;
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#endif
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}
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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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#ifdef RTC_DEBUG
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aprint_debug_dev(sc->sc_dev, "gettime: retry failed\n");
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#endif
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return EIO;
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}
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dt->dt_year += sc->sc_year0;
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if (dt->dt_year < POSIX_BASE_YEAR)
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dt->dt_year += 100;
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#ifdef RTC_DEBUG
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aprint_debug_dev(sc->sc_dev,
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"gettime: %04d-%02d-%02d %02d:%02d:%02d\n",
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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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if (!sc->sc_valid)
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return EIO;
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#endif
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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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struct rtc_softc *sc = h->cookie;
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unsigned int year;
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uint8_t r;
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year = dt->dt_year - sc->sc_year0;
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if (year > 99)
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year -= 100;
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year = TOBCD(year);
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r = _reg_read_1(SH_(RCR2));
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/* stop clock */
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_reg_write_1(SH_(RCR2), (r & ~SH_RCR2_START) | SH_RCR2_RESET);
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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);
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sc->sc_valid = 1;
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#ifdef RTC_DEBUG
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aprint_debug_dev(sc->sc_dev,
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"settime: %04d-%02d-%02d %02d:%02d:%02d\n",
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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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#endif
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return 0;
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}
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