diff options
Diffstat (limited to 'sys/arm/nvidia/as3722_rtc.c')
| -rw-r--r-- | sys/arm/nvidia/as3722_rtc.c | 115 |
1 files changed, 115 insertions, 0 deletions
diff --git a/sys/arm/nvidia/as3722_rtc.c b/sys/arm/nvidia/as3722_rtc.c new file mode 100644 index 000000000000..8f13104337f8 --- /dev/null +++ b/sys/arm/nvidia/as3722_rtc.c @@ -0,0 +1,115 @@ +/*- + * Copyright (c) 2016 Michal Meloun <mmel@FreeBSD.org> + * All rights reserved. + * + * 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 AUTHOR 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 AUTHOR 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> +__FBSDID("$FreeBSD$"); + +#include <sys/param.h> +#include <sys/systm.h> +#include <sys/bus.h> +#include <sys/clock.h> +#include <sys/kernel.h> + +#include <dev/ofw/ofw_bus.h> + +#include "clock_if.h" +#include "as3722.h" + +#define AS3722_RTC_START_YEAR 2000 + +int +as3722_rtc_gettime(device_t dev, struct timespec *ts) +{ + struct as3722_softc *sc; + struct clocktime ct; + uint8_t buf[6]; + int rv; + + sc = device_get_softc(dev); + + rv = as3722_read_buf(sc, AS3722_RTC_SECOND, buf, 6); + if (rv != 0) { + device_printf(sc->dev, "Failed to read RTC data\n"); + return (rv); + } + ct.nsec = 0; + ct.sec = bcd2bin(buf[0] & 0x7F); + ct.min = bcd2bin(buf[1] & 0x7F); + ct.hour = bcd2bin(buf[2] & 0x3F); + ct.day = bcd2bin(buf[3] & 0x3F); + ct.mon = bcd2bin(buf[4] & 0x1F); + ct.year = bcd2bin(buf[5] & 0x7F) + AS3722_RTC_START_YEAR; + ct.dow = -1; + + return clock_ct_to_ts(&ct, ts); +} + +int +as3722_rtc_settime(device_t dev, struct timespec *ts) +{ + struct as3722_softc *sc; + struct clocktime ct; + uint8_t buf[6]; + int rv; + + sc = device_get_softc(dev); + clock_ts_to_ct(ts, &ct); + + if (ct.year < AS3722_RTC_START_YEAR) + return (EINVAL); + + buf[0] = bin2bcd(ct.sec); + buf[1] = bin2bcd(ct.min); + buf[2] = bin2bcd(ct.hour); + buf[3] = bin2bcd(ct.day); + buf[4] = bin2bcd(ct.mon); + buf[5] = bin2bcd(ct.year - AS3722_RTC_START_YEAR); + + rv = as3722_write_buf(sc, AS3722_RTC_SECOND, buf, 6); + if (rv != 0) { + device_printf(sc->dev, "Failed to write RTC data\n"); + return (rv); + } + return (0); +} + +int +as3722_rtc_attach(struct as3722_softc *sc, phandle_t node) +{ + int rv; + + /* Enable RTC, set 24 hours mode and alarms */ + rv = RM1(sc, AS3722_RTC_CONTROL, + AS3722_RTC_ON | AS3722_RTC_ALARM_WAKEUP_EN | AS3722_RTC_AM_PM_MODE, + AS3722_RTC_ON | AS3722_RTC_ALARM_WAKEUP_EN); + if (rv < 0) { + device_printf(sc->dev, "Failed to initialize RTC controller\n"); + return (ENXIO); + } + clock_register(sc->dev, 1000000); + + return (0); +} |