132 lines
3.6 KiB
C
132 lines
3.6 KiB
C
/* $NetBSD: pl030_rtc.c,v 1.2 2001/11/23 19:36:50 thorpej Exp $ */
|
|
|
|
/*
|
|
* Copyright (c) 2001 ARM Ltd
|
|
* 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 company 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 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 header files */
|
|
|
|
#include <sys/types.h>
|
|
#include <sys/param.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/kernel.h>
|
|
#include <sys/time.h>
|
|
#include <sys/device.h>
|
|
|
|
#include <arm/cpufunc.h>
|
|
#include <machine/intr.h>
|
|
#include <evbarm/ifpga/ifpgavar.h>
|
|
#include <evbarm/ifpga/ifpgamem.h>
|
|
#include <evbarm/ifpga/ifpgareg.h>
|
|
|
|
#define PL030_RTC_SIZE 0x14
|
|
|
|
struct plrtc_softc {
|
|
struct device sc_dev;
|
|
bus_space_tag_t sc_iot;
|
|
bus_space_handle_t sc_ioh;
|
|
};
|
|
|
|
static int plrtc_probe (struct device *, struct cfdata *, void *);
|
|
static void plrtc_attach (struct device *, struct device *, void *);
|
|
|
|
struct cfattach plrtc_ca = {
|
|
sizeof(struct plrtc_softc), plrtc_probe, plrtc_attach
|
|
};
|
|
|
|
/* Remember our handle, since it isn't passed in by inittodr and
|
|
resettodr. */
|
|
static struct plrtc_softc *plrtc_sc;
|
|
|
|
static int timeset = 0;
|
|
|
|
static int
|
|
plrtc_probe(struct device *parent, struct cfdata *cf, void *aux)
|
|
{
|
|
if (strcmp(cf->cf_driver->cd_name, "plrtc") == 0)
|
|
return 1;
|
|
return 0;
|
|
}
|
|
|
|
static void
|
|
plrtc_attach(struct device *parent, struct device *self, void *aux)
|
|
{
|
|
struct ifpga_attach_args *ifa = aux;
|
|
struct plrtc_softc *sc = (struct plrtc_softc *)self;
|
|
|
|
sc->sc_iot = ifa->ifa_iot;
|
|
if (bus_space_map(ifa->ifa_iot, ifa->ifa_addr, PL030_RTC_SIZE, 0,
|
|
&sc->sc_ioh)) {
|
|
printf("%s: unable to map device\n", sc->sc_dev.dv_xname);
|
|
return;
|
|
}
|
|
|
|
plrtc_sc = sc;
|
|
|
|
printf("\n");
|
|
}
|
|
|
|
void
|
|
inittodr(time_t base)
|
|
{
|
|
time_t rtc_time;
|
|
struct plrtc_softc *sc = plrtc_sc;
|
|
|
|
if (sc == NULL)
|
|
panic("RTC not attached");
|
|
|
|
/* Default to the suggested time, but replace that with one from the
|
|
RTC if it seems more sensible. */
|
|
rtc_time = bus_space_read_4(sc->sc_iot, sc->sc_ioh, IFPGA_RTC_DR);
|
|
|
|
time.tv_usec = 0;
|
|
time.tv_sec = rtc_time;
|
|
|
|
timeset = 1;
|
|
|
|
if (base > rtc_time) {
|
|
printf("inittodr: rtc value suspect, ignoring it.\n");
|
|
time.tv_usec = 0;
|
|
time.tv_sec = base;
|
|
return;
|
|
}
|
|
}
|
|
|
|
void
|
|
resettodr()
|
|
{
|
|
struct plrtc_softc *sc = plrtc_sc;
|
|
|
|
/* The time hasn't been set yet, so avoid writing a dubious value
|
|
to the RTC. */
|
|
if (!timeset)
|
|
return;
|
|
|
|
bus_space_write_4(sc->sc_iot, sc->sc_ioh, IFPGA_RTC_LR, time.tv_sec);
|
|
}
|