From 81f0e10ca56af97713003a5595036ecd36df62a9 Mon Sep 17 00:00:00 2001 From: uwe Date: Tue, 11 Dec 2001 00:29:21 +0000 Subject: [PATCH] rtc (ds1287a) time of day clock at ebus. --- sys/arch/sparc/dev/rtc.c | 282 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 282 insertions(+) create mode 100644 sys/arch/sparc/dev/rtc.c diff --git a/sys/arch/sparc/dev/rtc.c b/sys/arch/sparc/dev/rtc.c new file mode 100644 index 000000000000..1734d7aeb3d2 --- /dev/null +++ b/sys/arch/sparc/dev/rtc.c @@ -0,0 +1,282 @@ +/* $NetBSD: rtc.c,v 1.1 2001/12/11 00:29:21 uwe Exp $ */ + +/* + * Copyright (c) 2001 Valeriy E. Ushakov + * 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. + * 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. + */ + +/* + * `rtc' is a DS1287A (== MC146818A) time-of-day clock at EBus. + * In Krups it's not used to store idprom so this driver doesn't + * support it. Don't know about other ms-IIep systems. + */ + +#include +#include +#include +#include +#include +#ifdef GPROF +#include +#endif + +#include +#include + +#include +#include + +#include +#include + +struct rtc_ebus_softc { + struct device sc_dev; + + bus_space_tag_t sc_bt; /* parent bus tag */ + bus_space_handle_t sc_bh; /* handle for registers */ +}; + +static int rtcmatch_ebus(struct device *, struct cfdata *, void *); +static void rtcattach_ebus(struct device *, struct device *, void *); + +struct cfattach rtc_ebus_ca = { + sizeof(struct rtc_ebus_softc), rtcmatch_ebus, rtcattach_ebus +}; + + +/* XXX: global TOD clock handle (sparc/clock.c) */ +extern todr_chip_handle_t todr_handle; + +/* todr(9) methods */ +int rtc_gettime(todr_chip_handle_t, struct timeval *); +int rtc_settime(todr_chip_handle_t, struct timeval *); +int rtc_getcal(todr_chip_handle_t, int *); +int rtc_setcal(todr_chip_handle_t, int); + +int rtc_auto_century_adjust = 1; /* XXX: do we ever want not to? */ + + +/* + * MD read/write functions declared in mc146818reg.h + */ +#define RTC_ADDR 0 +#define RTC_DATA 1 + +u_int +mc146818_read(cookie, reg) + void *cookie; + u_int reg; +{ + struct rtc_ebus_softc *sc = cookie; + + bus_space_write_1(sc->sc_bt, sc->sc_bh, RTC_ADDR, reg); + return (bus_space_read_1(sc->sc_bt, sc->sc_bh, RTC_DATA)); +} + +void +mc146818_write(cookie, reg, datum) + void *cookie; + u_int reg; + u_int datum; +{ + struct rtc_ebus_softc *sc = cookie; + + bus_space_write_1(sc->sc_bt, sc->sc_bh, RTC_ADDR, reg); + bus_space_write_1(sc->sc_bt, sc->sc_bh, RTC_DATA, datum); +} + + +static int +rtcmatch_ebus(parent, cf, aux) + struct device *parent; + struct cfdata *cf; + void *aux; +{ + struct ebus_attach_args *ea = aux; + + return (strcmp(cf->cf_driver->cd_name, ea->ea_name) == 0); +} + +static void +rtcattach_ebus(parent, self, aux) + struct device *parent; + struct device *self; + void *aux; +{ + struct rtc_ebus_softc *sc = (void *)self; + struct ebus_attach_args *ea = aux; + + todr_chip_handle_t handle; + + sc->sc_bt = ea->ea_bustag; + if (ebus_bus_map(sc->sc_bt, + BUS_ADDR(ea->ea_reg[0].bar, ea->ea_reg[0].offset), + ea->ea_reg[0].size, + BUS_SPACE_MAP_LINEAR, 0, + &sc->sc_bh) != 0) + { + printf(": can't map registers\n", self->dv_xname); + return; + } + + /* XXX: no "model" property in Krups */ + printf(": time-of-day clock\n"); + + /* + * Turn interrupts off (clear MC_REGB_?IE bits), just in case + * (although they shouldn't be wired to an interrupt + * controller on sparcs). + */ + mc146818_write(sc, MC_REGB, MC_REGB_BINARY | MC_REGB_24HR); + + /* setup our todr_handle */ + handle = malloc(ALIGN(sizeof(struct todr_chip_handle)), + M_DEVBUF, M_NOWAIT); + + handle->cookie = sc; + handle->bus_cookie = NULL; /* unused */ + handle->todr_gettime = rtc_gettime; + handle->todr_settime = rtc_settime; + handle->todr_getcal = rtc_getcal; + handle->todr_setcal = rtc_setcal; + handle->todr_setwen = NULL; /* not necessary, no idprom to protect */ + + todr_handle = handle; +} + + +/* + * Get time-of-day and convert to a `struct timeval' + * Return 0 on success; an error number otherwise. + */ +int +rtc_gettime(handle, tv) + todr_chip_handle_t handle; + struct timeval *tv; +{ + struct rtc_ebus_softc *sc = handle->cookie; + struct clock_ymdhms dt; + u_int year; + + /* update in progress; spin loop */ + while (mc146818_read(sc, MC_REGA) & MC_REGA_UIP) + continue; + + /* stop updates (XXX: do we need that???) */ + mc146818_write(sc, MC_REGB, + (mc146818_read(sc, MC_REGB) | MC_REGB_SET)); + + /* read time */ + dt.dt_sec = mc146818_read(sc, MC_SEC); + dt.dt_min = mc146818_read(sc, MC_MIN); + dt.dt_hour = mc146818_read(sc, MC_HOUR); + dt.dt_day = mc146818_read(sc, MC_DOM); + dt.dt_mon = mc146818_read(sc, MC_MONTH); + year = mc146818_read(sc, MC_YEAR); + + /* reenable updates */ + mc146818_write(sc, MC_REGB, + (mc146818_read(sc, MC_REGB) & ~MC_REGB_SET)); + + /* year in the century 0..99: adjust to AD */ + year += 1900; + if (year < POSIX_BASE_YEAR && rtc_auto_century_adjust != 0) + year += 100; + dt.dt_year = 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 (ERANGE); + + tv->tv_sec = clock_ymdhms_to_secs(&dt); + tv->tv_usec = 0; + return (0); +} + +/* + * Set the time-of-day clock based on the value of the `struct timeval' arg. + * Return 0 on success; an error number otherwise. + */ +int +rtc_settime(handle, tv) + todr_chip_handle_t handle; + struct timeval *tv; +{ + struct rtc_ebus_softc *sc = handle->cookie; + struct clock_ymdhms dt; + u_int year; + u_int wday; + + clock_secs_to_ymdhms(tv->tv_sec, &dt); + + year = dt.dt_year - 1900; + if (year >= 100 && rtc_auto_century_adjust != 0) + year -= 100; + + wday = dt.dt_wday; + if (wday == 0) + wday = 7; + + /* stop updates */ + mc146818_write(sc, MC_REGB, + (mc146818_read(sc, MC_REGB) | MC_REGB_SET)); + + mc146818_write(sc, MC_SEC, dt.dt_sec); + mc146818_write(sc, MC_MIN, dt.dt_min); + mc146818_write(sc, MC_HOUR, dt.dt_hour); + mc146818_write(sc, MC_DOW, wday); + mc146818_write(sc, MC_DOM, dt.dt_day); + mc146818_write(sc, MC_MONTH, dt.dt_mon); + mc146818_write(sc, MC_YEAR, year); + + /* reenable updates */ + mc146818_write(sc, MC_REGB, + (mc146818_read(sc, MC_REGB) & ~MC_REGB_SET)); + return (0); +} + + +/* + * RTC does not support TOD clock calibration + */ + +/* ARGSUSED */ +int +rtc_getcal(handle, vp) + todr_chip_handle_t handle; + int *vp; +{ + return (EOPNOTSUPP); +} + +/* ARGSUSED */ +int +rtc_setcal(handle, v) + todr_chip_handle_t handle; + int v; +{ + return (EOPNOTSUPP); +}