DS1553 RTC module driver. On the MPC8555CDS system it hangs off of the LBC bus.
Obtained from: Semihalf
This commit is contained in:
Rafal Jaworowski
parent
c3f674da2a
commit
f07ef6e4e3
@ -109,6 +109,8 @@ powerpc/fpu/fpu_mul.c optional fpu_emu
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powerpc/fpu/fpu_sqrt.c optional fpu_emu
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powerpc/fpu/fpu_subr.c optional fpu_emu
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powerpc/mpc85xx/atpic.c optional mpc85xx isa
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powerpc/mpc85xx/ds1553_bus_lbc.c optional ds1553
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powerpc/mpc85xx/ds1553_core.c optional ds1553
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powerpc/mpc85xx/isa.c optional mpc85xx isa
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powerpc/mpc85xx/i2c.c optional iicbus mpc85xx
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powerpc/mpc85xx/lbc.c optional mpc85xx
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@ -56,6 +56,7 @@ device cfi
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device crypto
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device cryptodev
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device da
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device ds1553
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device em
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device ether
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device fxp
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134
sys/powerpc/mpc85xx/ds1553_bus_lbc.c
Normal file
134
sys/powerpc/mpc85xx/ds1553_bus_lbc.c
Normal file
@ -0,0 +1,134 @@
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/*-
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* Copyright (C) 2006-2008 Semihalf, Grzegorz Bernacki
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* All rights reserved.
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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 AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/cdefs.h>
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/bus.h>
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#include <sys/clock.h>
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#include <sys/kernel.h>
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#include <sys/lock.h>
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#include <sys/module.h>
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#include <sys/mutex.h>
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#include <sys/resource.h>
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#include <sys/rman.h>
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#include <machine/bus.h>
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#include <machine/resource.h>
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#include <powerpc/mpc85xx/ds1553_reg.h>
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#include <powerpc/mpc85xx/lbc.h>
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#include "clock_if.h"
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static devclass_t rtc_devclass;
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static int rtc_attach(device_t dev);
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static int rtc_probe(device_t dev);
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static device_method_t rtc_methods[] = {
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/* Device interface */
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DEVMETHOD(device_probe, rtc_probe),
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DEVMETHOD(device_attach, rtc_attach),
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/* clock interface */
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DEVMETHOD(clock_gettime, ds1553_gettime),
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DEVMETHOD(clock_settime, ds1553_settime),
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{ 0, 0 }
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};
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static driver_t rtc_driver = {
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"rtc",
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rtc_methods,
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sizeof(struct ds1553_softc),
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};
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DRIVER_MODULE(rtc, lbc, rtc_driver, rtc_devclass, 0, 0);
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static int
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rtc_probe(device_t dev)
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{
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uintptr_t devtype;
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int error;
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error = BUS_READ_IVAR(device_get_parent(dev), dev, LBC_IVAR_DEVTYPE,
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&devtype);
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if (error)
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return (error);
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if (devtype != LBC_DEVTYPE_RTC)
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return (EINVAL);
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device_set_desc(dev, "Real Time Clock");
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return (0);
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}
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static int
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rtc_attach(device_t dev)
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{
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struct timespec ts;
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struct ds1553_softc *sc;
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int error;
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sc = device_get_softc(dev);
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bzero(sc, sizeof(struct ds1553_softc));
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mtx_init(&sc->sc_mtx, "rtc_mtx", NULL, MTX_SPIN);
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sc->res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &sc->rid,
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RF_ACTIVE);
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if (sc->res == NULL) {
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device_printf(dev, "cannot allocate resources\n");
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mtx_destroy(&sc->sc_mtx);
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return (ENXIO);
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}
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sc->sc_bst = rman_get_bustag(sc->res);
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sc->sc_bsh = rman_get_bushandle(sc->res);
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if ((error = ds1553_attach(dev)) != 0) {
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device_printf(dev, "cannot attach time of day clock\n");
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bus_release_resource(dev, SYS_RES_MEMORY, sc->rid, sc->res);
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mtx_destroy(&sc->sc_mtx);
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return (error);
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}
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clock_register(dev, 1000000);
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if (bootverbose) {
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ds1553_gettime(dev, &ts);
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device_printf(dev, "current time: %ld.%09ld\n",
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(long)ts.tv_sec, ts.tv_nsec);
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}
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return (0);
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}
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194
sys/powerpc/mpc85xx/ds1553_core.c
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194
sys/powerpc/mpc85xx/ds1553_core.c
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@ -0,0 +1,194 @@
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/*-
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* Copyright (C) 2006-2008 Semihalf, Grzegorz Bernacki
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* All rights reserved.
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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 AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/bus.h>
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#include <sys/clock.h>
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#include <sys/lock.h>
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#include <sys/mutex.h>
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#include <machine/bus.h>
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#include <powerpc/mpc85xx/ds1553_reg.h>
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static uint8_t ds1553_direct_read(device_t, bus_size_t);
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static void ds1553_direct_write(device_t, bus_size_t, uint8_t);
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int
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ds1553_attach(device_t dev)
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{
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struct ds1553_softc *sc;
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uint8_t sec, flags;
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sc = device_get_softc(dev);
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if (mtx_initialized(&sc->sc_mtx) == 0) {
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device_printf(dev, "%s: mutex not initialized\n", __func__);
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return (ENXIO);
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}
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if (sc->sc_read == NULL)
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sc->sc_read = ds1553_direct_read;
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if (sc->sc_write == NULL)
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sc->sc_write = ds1553_direct_write;
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sc->year_offset = POSIX_BASE_YEAR;
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mtx_lock_spin(&sc->sc_mtx);
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/* Turn RTC on if it was not on */
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sec = (*sc->sc_read)(dev, DS1553_OFF_SECONDS);
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if (sec & DS1553_BIT_OSC) {
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sec &= ~(DS1553_BIT_OSC);
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(*sc->sc_write)(dev, DS1553_OFF_SECONDS, sec);
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}
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/* Low-battery check */
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flags = (*sc->sc_read)(dev, DS1553_OFF_FLAGS);
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if (flags & DS1553_BIT_BLF)
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device_printf(dev, "voltage-low detected.\n");
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mtx_unlock_spin(&sc->sc_mtx);
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return (0);
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}
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/*
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* Get time of day and convert it to a struct timespec.
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* Return 0 on success, an error number otherwise.
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*/
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int
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ds1553_gettime(device_t dev, struct timespec *ts)
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{
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struct clocktime ct;
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struct ds1553_softc *sc;
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uint8_t control;
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sc = device_get_softc(dev);
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mtx_lock_spin(&sc->sc_mtx);
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control = (*sc->sc_read)(dev, DS1553_OFF_CONTROL) | DS1553_BIT_READ;
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(*sc->sc_write)(dev, DS1553_OFF_CONTROL, control);
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ct.nsec = 0;
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ct.sec = FROMBCD((*sc->sc_read)(dev, DS1553_OFF_SECONDS) &
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DS1553_MASK_SECONDS);
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ct.min = FROMBCD((*sc->sc_read)(dev, DS1553_OFF_MINUTES) &
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DS1553_MASK_MINUTES);
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ct.hour = FROMBCD((*sc->sc_read)(dev, DS1553_OFF_HOURS) &
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DS1553_MASK_HOUR);
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ct.dow = FROMBCD((*sc->sc_read)(dev, DS1553_OFF_DAYOFWEEK) &
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DS1553_MASK_DAYOFWEEK) - 1;
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ct.day = FROMBCD((*sc->sc_read)(dev, DS1553_OFF_DATE) &
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DS1553_MASK_DATE);
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ct.mon = FROMBCD((*sc->sc_read)(dev, DS1553_OFF_MONTH) &
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DS1553_MASK_MONTH);
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ct.year = FROMBCD((*sc->sc_read)(dev, DS1553_OFF_YEAR));
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control &= ~DS1553_BIT_READ;
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(*sc->sc_write)(dev, DS1553_OFF_CONTROL, control);
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ct.year += sc->year_offset;
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mtx_unlock_spin(&sc->sc_mtx);
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return (clock_ct_to_ts(&ct, ts));
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}
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/*
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* Set the time of day clock based on the value of the struct timespec arg.
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* Return 0 on success, an error number otherwise.
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*/
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int
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ds1553_settime(device_t dev, struct timespec *ts)
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{
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struct clocktime ct;
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struct ds1553_softc *sc;
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uint8_t control;
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sc = device_get_softc(dev);
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bzero(&ct, sizeof(struct clocktime));
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/* Accuracy is only one second. */
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if (ts->tv_nsec >= 500000000)
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ts->tv_sec++;
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ts->tv_nsec = 0;
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clock_ts_to_ct(ts, &ct);
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ct.year -= sc->year_offset;
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mtx_lock_spin(&sc->sc_mtx);
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/* Halt updates to external registers */
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control = (*sc->sc_read)(dev, DS1553_OFF_CONTROL) | DS1553_BIT_WRITE;
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(*sc->sc_write)(dev, DS1553_OFF_CONTROL, control);
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(*sc->sc_write)(dev, DS1553_OFF_SECONDS, TOBCD(ct.sec) &
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DS1553_MASK_SECONDS);
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(*sc->sc_write)(dev, DS1553_OFF_MINUTES, TOBCD(ct.min) &
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DS1553_MASK_MINUTES);
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(*sc->sc_write)(dev, DS1553_OFF_HOURS, TOBCD(ct.hour) &
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DS1553_MASK_HOUR);
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(*sc->sc_write)(dev, DS1553_OFF_DAYOFWEEK, TOBCD(ct.dow + 1) &
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DS1553_MASK_DAYOFWEEK);
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(*sc->sc_write)(dev, DS1553_OFF_DATE, TOBCD(ct.day) &
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DS1553_MASK_DATE);
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(*sc->sc_write)(dev, DS1553_OFF_MONTH, TOBCD(ct.mon) &
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DS1553_MASK_MONTH);
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(*sc->sc_write)(dev, DS1553_OFF_YEAR, TOBCD(ct.year));
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/* Resume updates to external registers */
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control &= ~DS1553_BIT_WRITE;
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(*sc->sc_write)(dev, DS1553_OFF_CONTROL, control);
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mtx_unlock_spin(&sc->sc_mtx);
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return (0);
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}
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static uint8_t
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ds1553_direct_read(device_t dev, bus_size_t off)
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{
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struct ds1553_softc *sc;
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sc = device_get_softc(dev);
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return (bus_space_read_1(sc->sc_bst, sc->sc_bsh, off));
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}
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static void
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ds1553_direct_write(device_t dev, bus_size_t off, uint8_t val)
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{
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struct ds1553_softc *sc;
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sc = device_get_softc(dev);
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bus_space_write_1(sc->sc_bst, sc->sc_bsh, off, val);
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}
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107
sys/powerpc/mpc85xx/ds1553_reg.h
Normal file
107
sys/powerpc/mpc85xx/ds1553_reg.h
Normal file
@ -0,0 +1,107 @@
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/*-
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* Copyright (C) 2006-2008 Semihalf, Grzegorz Bernacki
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* All rights reserved.
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*
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* 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 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
|
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef _DEV_RTC_DS1553_H_
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#define _DEV_RTC_DS1553_H_
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/* DS1553 registers */
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#define DS1553_NVRAM_SIZE 0x1ff0
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#define DS1553_OFF_FLAGS 0x1ff0
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#define DS1553_OFF_ALARM_SECONDS 0x1ff2
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#define DS1553_OFF_ALARM_MINUTES 0x1ff3
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#define DS1553_OFF_ALARM_HOURS 0x1ff4
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#define DS1553_OFF_ALARM_DATE 0x1ff5
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#define DS1553_OFF_INTERRUPTS 0x1ff6
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#define DS1553_OFF_WATCHDOG 0x1ff7
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#define DS1553_OFF_CONTROL 0x1ff8
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#define DS1553_OFF_SECONDS 0x1ff9
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#define DS1553_OFF_MINUTES 0x1ffa
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#define DS1553_OFF_HOURS 0x1ffb
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#define DS1553_OFF_DAYOFWEEK 0x1ffc
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#define DS1553_OFF_DATE 0x1ffd
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#define DS1553_OFF_MONTH 0x1ffe
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#define DS1553_OFF_YEAR 0x1fff
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/* dayofweek register's bits */
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#define DS1553_BIT_FREQ_TEST 0x40 /* frequency test bit */
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/* seconds register's bit */
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#define DS1553_BIT_OSC 0x80 /* oscillator start/stop bit */
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/* control register's bits */
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#define DS1553_BIT_WRITE 0x80 /* write */
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#define DS1553_BIT_READ 0x40 /* read */
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/* watchdog register's bits */
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#define DS1553_BIT_WATCHDOG 0x80 /* watchdog steering bit */
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#define DS1553_BIT_BMB4 0x40 /* watchdog multiplier bit4 */
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#define DS1553_BIT_BMB3 0x20 /* watchdog multiplier bit3 */
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#define DS1553_BIT_BMB2 0x10 /* watchdog multiplier bit2 */
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#define DS1553_BIT_BMB1 0x8 /* watchdog multiplier bit1 */
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#define DS1553_BIT_BMB0 0x4 /* watchdog multiplier bit0 */
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#define DS1553_BIT_RB1 0x2 /* watchdog resolution bit1 */
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#define DS1553_BIT_RB0 0x1 /* watchdog resolution bit0 */
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/* alarm seconds/minutes/hours/date register's bit */
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#define DS1553_BIT_AM 0x80 /* alarm mask bit */
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/* flag register's bits */
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#define DS1553_BIT_BLF 0x10 /* battery flag */
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#define DS1553_BIT_WF 0x80 /* watchdog flag */
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/* register's mask */
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#define DS1553_MASK_MONTH 0x1f
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#define DS1553_MASK_DATE 0x3f
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#define DS1553_MASK_DAYOFWEEK 0x7
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#define DS1553_MASK_HOUR 0x3f
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#define DS1553_MASK_MINUTES 0x7f
|
||||
#define DS1553_MASK_SECONDS 0x7f
|
||||
|
||||
struct ds1553_softc {
|
||||
|
||||
bus_space_tag_t sc_bst; /* bus space tag */
|
||||
bus_space_handle_t sc_bsh; /* bus space handle */
|
||||
|
||||
int rid; /* resource id */
|
||||
struct resource *res;
|
||||
struct mtx sc_mtx; /* hardware mutex */
|
||||
|
||||
uint32_t year_offset;
|
||||
/* read/write functions */
|
||||
uint8_t (*sc_read)(device_t, bus_size_t);
|
||||
void (*sc_write)(device_t, bus_size_t, uint8_t);
|
||||
};
|
||||
|
||||
/* device interface */
|
||||
int ds1553_attach(device_t);
|
||||
|
||||
/* clock interface */
|
||||
int ds1553_gettime(device_t, struct timespec *);
|
||||
int ds1553_settime(device_t, struct timespec *);
|
||||
|
||||
#endif /* _DEV_RTC_DS1553_H_ */
|
||||
Loading…
Reference in New Issue
Block a user