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/* $OpenBSD: sxirtc.c,v 1.3 2019/01/21 11:24:05 jsg Exp $ */
/*
* Copyright (c) 2008 Mark Kettenis
* Copyright (c) 2013 Artturi Alm
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <sys/param.h>
#include <sys/device.h>
#include <sys/malloc.h>
#include <sys/systm.h>
#include <dev/clock_subr.h>
#include <machine/bus.h>
#include <machine/fdt.h>
#include <dev/fdt/sunxireg.h>
#include <dev/ofw/openfirm.h>
#include <dev/ofw/fdt.h>
#define SXIRTC_YYMMDD 0x04
#define SXIRTC_HHMMSS 0x08
#define SXIRTC_YYMMDD_A31 0x10
#define SXIRTC_HHMMSS_A31 0x14
#define LEAPYEAR(y) \
(((y) % 4 == 0 && \
(y) % 100 != 0) || \
(y) % 400 == 0)
extern todr_chip_handle_t todr_handle;
struct sxirtc_softc {
struct device sc_dev;
bus_space_tag_t sc_iot;
bus_space_handle_t sc_ioh;
bus_size_t sc_yymmdd;
bus_size_t sc_hhmmss;
uint32_t base_year;
uint32_t year_mask;
uint32_t leap_shift;
};
int sxirtc_match(struct device *, void *, void *);
void sxirtc_attach(struct device *, struct device *, void *);
struct cfattach sxirtc_ca = {
sizeof(struct sxirtc_softc), sxirtc_match, sxirtc_attach
};
struct cfdriver sxirtc_cd = {
NULL, "sxirtc", DV_DULL
};
int sxirtc_gettime(todr_chip_handle_t, struct timeval *);
int sxirtc_settime(todr_chip_handle_t, struct timeval *);
int
sxirtc_match(struct device *parent, void *match, void *aux)
{
struct fdt_attach_args *faa = aux;
return (OF_is_compatible(faa->fa_node, "allwinner,sun4i-a10-rtc") ||
OF_is_compatible(faa->fa_node, "allwinner,sun7i-a20-rtc") ||
OF_is_compatible(faa->fa_node, "allwinner,sun6i-a31-rtc") ||
OF_is_compatible(faa->fa_node, "allwinner,sun8i-h3-rtc") ||
OF_is_compatible(faa->fa_node, "allwinner,sun50i-h5-rtc"));
}
void
sxirtc_attach(struct device *parent, struct device *self, void *aux)
{
struct sxirtc_softc *sc = (struct sxirtc_softc *)self;
struct fdt_attach_args *faa = aux;
todr_chip_handle_t handle;
if (faa->fa_nreg < 1)
return;
handle = malloc(sizeof(struct todr_chip_handle), M_DEVBUF, M_NOWAIT);
if (handle == NULL)
panic("sxirtc_attach: couldn't allocate todr_handle");
sc->sc_iot = faa->fa_iot;
if (bus_space_map(sc->sc_iot, faa->fa_reg[0].addr,
faa->fa_reg[0].size, 0, &sc->sc_ioh))
panic("sxirtc_attach: bus_space_map failed!");
if (OF_is_compatible(faa->fa_node, "allwinner,sun6i-a31-rtc") ||
OF_is_compatible(faa->fa_node, "allwinner,sun8i-h3-rtc") ||
OF_is_compatible(faa->fa_node, "allwinner,sun50i-h5-rtc")) {
sc->sc_yymmdd = SXIRTC_YYMMDD_A31;
sc->sc_hhmmss = SXIRTC_HHMMSS_A31;
} else {
sc->sc_yymmdd = SXIRTC_YYMMDD;
sc->sc_hhmmss = SXIRTC_HHMMSS;
}
if (OF_is_compatible(faa->fa_node, "allwinner,sun7i-a20-rtc")) {
sc->base_year = 1970;
sc->year_mask = 0xff;
sc->leap_shift = 24;
} else {
sc->base_year = 2010;
sc->year_mask = 0x3f;
sc->leap_shift = 22;
}
handle->cookie = self;
handle->todr_gettime = sxirtc_gettime;
handle->todr_settime = sxirtc_settime;
handle->todr_getcal = NULL;
handle->todr_setcal = NULL;
handle->bus_cookie = NULL;
handle->todr_setwen = NULL;
todr_handle = handle;
printf("\n");
}
int
sxirtc_gettime(todr_chip_handle_t handle, struct timeval *tv)
{
struct sxirtc_softc *sc = (struct sxirtc_softc *)handle->cookie;
struct clock_ymdhms dt;
uint32_t reg;
reg = SXIREAD4(sc, sc->sc_hhmmss);
dt.dt_sec = reg & 0x3f;
dt.dt_min = reg >> 8 & 0x3f;
dt.dt_hour = reg >> 16 & 0x1f;
dt.dt_wday = reg >> 29 & 0x07;
reg = SXIREAD4(sc, sc->sc_yymmdd);
dt.dt_day = reg & 0x1f;
dt.dt_mon = reg >> 8 & 0x0f;
dt.dt_year = (reg >> 16 & sc->year_mask) + sc->base_year;
if (dt.dt_sec > 59 || dt.dt_min > 59 ||
dt.dt_hour > 23 || dt.dt_wday > 6 ||
dt.dt_day > 31 || dt.dt_day == 0 ||
dt.dt_mon > 12 || dt.dt_mon == 0)
return 1;
/*
* Reject the first year that can be represented by the clock.
* This avoids reporting a bogus time if the RTC isn't battery
* powered.
*/
if (dt.dt_year == sc->base_year)
return 1;
tv->tv_sec = clock_ymdhms_to_secs(&dt);
tv->tv_usec = 0;
return 0;
}
int
sxirtc_settime(todr_chip_handle_t handle, struct timeval *tv)
{
struct sxirtc_softc *sc = (struct sxirtc_softc *)handle->cookie;
struct clock_ymdhms dt;
clock_secs_to_ymdhms(tv->tv_sec, &dt);
if (dt.dt_sec > 59 || dt.dt_min > 59 ||
dt.dt_hour > 23 || dt.dt_wday > 6 ||
dt.dt_day > 31 || dt.dt_day == 0 ||
dt.dt_mon > 12 || dt.dt_mon == 0)
return 1;
SXICMS4(sc, sc->sc_hhmmss, 0xe0000000 | 0x1f0000 | 0x3f00 | 0x3f,
dt.dt_sec | (dt.dt_min << 8) | (dt.dt_hour << 16) |
(dt.dt_wday << 29));
SXICMS4(sc, sc->sc_yymmdd, 0x00400000 | (sc->year_mask << 16) |
0x0f00 | 0x1f, dt.dt_day | (dt.dt_mon << 8) |
((dt.dt_year - sc->base_year) << 16) |
(LEAPYEAR(dt.dt_year) << sc->leap_shift));
return 0;
}
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