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/* $OpenBSD: prtc.c,v 1.7 2022/10/12 13:39:50 kettenis Exp $ */
/*
* Copyright (c) 2008 Mark Kettenis
*
* 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.
*/
/*
* Driver to get the time-of-day from the PROM for machines that don't
* have a hardware real-time clock, like the Enterprise 10000,
* Fire 12K and Fire 15K.
*/
#include <sys/param.h>
#include <sys/device.h>
#include <sys/malloc.h>
#include <sys/systm.h>
#include <machine/autoconf.h>
#include <machine/openfirm.h>
#include <machine/sparc64.h>
#include <dev/clock_subr.h>
extern todr_chip_handle_t todr_handle;
struct prtc_softc {
struct device sc_dev;
struct todr_chip_handle
sc_todr_chip;
};
int prtc_match(struct device *, void *, void *);
void prtc_attach(struct device *, struct device *, void *);
const struct cfattach prtc_ca = {
sizeof(struct prtc_softc), prtc_match, prtc_attach
};
struct cfdriver prtc_cd = {
NULL, "prtc", DV_DULL
};
int prtc_gettime(todr_chip_handle_t, struct timeval *);
int prtc_settime(todr_chip_handle_t, struct timeval *);
int prtc_opl_gettime(todr_chip_handle_t, struct timeval *);
int prtc_opl_settime(todr_chip_handle_t, struct timeval *);
int
prtc_match(struct device *parent, void *match, void *aux)
{
struct mainbus_attach_args *ma = aux;
if (strcmp(ma->ma_name, "prtc") == 0)
return (1);
return (0);
}
void
prtc_attach(struct device *parent, struct device *self, void *aux)
{
struct prtc_softc *sc = (struct prtc_softc *)self;
todr_chip_handle_t handle = &sc->sc_todr_chip;
char buf[32];
int opl;
opl = OF_getprop(findroot(), "name", buf, sizeof(buf)) > 0 &&
strcmp(buf, "SUNW,SPARC-Enterprise") == 0;
if (opl)
printf(": OPL");
printf("\n");
handle->cookie = sc;
if (opl) {
handle->todr_gettime = prtc_opl_gettime;
handle->todr_settime = prtc_opl_settime;
} else {
handle->todr_gettime = prtc_gettime;
handle->todr_settime = prtc_settime;
}
handle->bus_cookie = NULL;
handle->todr_setwen = NULL;
handle->todr_quality = 0;
todr_handle = handle;
}
int
prtc_gettime(todr_chip_handle_t handle, struct timeval *tv)
{
char buf[32];
u_int32_t tod = 0;
snprintf(buf, sizeof(buf), "h# %08lx unix-gettod", (long)&tod);
OF_interpret(buf, 0);
tv->tv_sec = tod;
tv->tv_usec = 0;
return (0);
}
int
prtc_settime(todr_chip_handle_t handle, struct timeval *tv)
{
return (0);
}
int
prtc_opl_gettime(todr_chip_handle_t handle, struct timeval *tv)
{
struct {
cell_t name;
cell_t nargs;
cell_t nrets;
cell_t stick;
cell_t time;
} args = {
.name = ADR2CELL("FJSV,get-tod"),
.nargs = 0,
.nrets = 2,
};
if (openfirmware(&args) == -1)
return (-1);
tv->tv_sec = args.time;
tv->tv_usec = 0;
return (0);
}
int
prtc_opl_settime(todr_chip_handle_t handle, struct timeval *tv)
{
struct timeval otv;
struct {
cell_t name;
cell_t nargs;
cell_t nrets;
cell_t diff;
} args = {
.name = ADR2CELL("FJSV,set-domain-time"),
.nargs = 1,
.nrets = 0,
};
if (prtc_opl_gettime(handle, &otv) == -1)
return (-1);
args.diff = tv->tv_sec - otv.tv_sec;
if (args.diff == 0)
return (0);
if (openfirmware(&args) == -1)
return (-1);
return (0);
}
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