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/* $OpenBSD: opal.c,v 1.4 2020/06/22 21:13:40 kettenis Exp $ */
/*
* Copyright (c) 2020 Mark Kettenis <kettenis@openbsd.org>
*
* 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/systm.h>
#include <sys/device.h>
#include <machine/bus.h>
#include <machine/fdt.h>
#include <machine/opal.h>
#include <dev/clock_subr.h>
#include <dev/ofw/openfirm.h>
#include <dev/ofw/fdt.h>
struct opal_softc {
struct device sc_dev;
struct todr_chip_handle sc_todr;
};
int opal_match(struct device *, void *, void *);
void opal_attach(struct device *, struct device *, void *);
struct cfattach opal_ca = {
sizeof (struct opal_softc), opal_match, opal_attach
};
struct cfdriver opal_cd = {
NULL, "opal", DV_DULL
};
void opal_attach_node(struct opal_softc *, int);
int opal_gettime(struct todr_chip_handle *, struct timeval *);
int opal_settime(struct todr_chip_handle *, struct timeval *);
int
opal_match(struct device *parent, void *match, void *aux)
{
struct fdt_attach_args *faa = aux;
return OF_is_compatible(faa->fa_node, "ibm,opal-v3");
}
void
opal_attach(struct device *parent, struct device *self, void *aux)
{
struct opal_softc *sc = (struct opal_softc *)self;
struct fdt_attach_args *faa = aux;
int node;
node = OF_getnodebyname(faa->fa_node, "firmware");
if (node) {
char version[64];
version[0] = 0;
OF_getprop(node, "version", version, sizeof(version));
version[sizeof(version) - 1] = 0;
printf(": %s", version);
}
printf("\n");
sc->sc_todr.todr_gettime = opal_gettime;
sc->sc_todr.todr_settime = opal_settime;
todr_attach(&sc->sc_todr);
node = OF_getnodebyname(faa->fa_node, "consoles");
if (node) {
for (node = OF_child(node); node; node = OF_peer(node))
opal_attach_node(sc, node);
}
}
int
opal_print(void *aux, const char *pnp)
{
struct fdt_attach_args *faa = aux;
char name[32];
if (!pnp)
return (QUIET);
if (OF_getprop(faa->fa_node, "name", name, sizeof(name)) > 0) {
name[sizeof(name) - 1] = 0;
printf("\"%s\"", name);
} else
printf("node %u", faa->fa_node);
printf(" at %s", pnp);
return (UNCONF);
}
void
opal_attach_node(struct opal_softc *sc, int node)
{
struct fdt_attach_args faa;
char buf[32];
if (OF_getproplen(node, "compatible") <= 0)
return;
if (OF_getprop(node, "status", buf, sizeof(buf)) > 0 &&
strcmp(buf, "disabled") == 0)
return;
memset(&faa, 0, sizeof(faa));
faa.fa_name = "";
faa.fa_node = node;
config_found(&sc->sc_dev, &faa, opal_print);
}
int
opal_gettime(struct todr_chip_handle *ch, struct timeval *tv)
{
struct clock_ymdhms dt;
uint64_t time;
uint32_t date;
int64_t error;
do {
error = opal_rtc_read(opal_phys(&date), opal_phys(&time));
if (error == OPAL_BUSY_EVENT)
opal_poll_events(NULL);
} while (error == OPAL_BUSY_EVENT);
if (error != OPAL_SUCCESS)
return EIO;
dt.dt_sec = FROMBCD((time >> 40) & 0xff);
dt.dt_min = FROMBCD((time >> 48) & 0xff);
dt.dt_hour = FROMBCD((time >> 56) & 0xff);
dt.dt_day = FROMBCD((date >> 0) & 0xff);
dt.dt_mon = FROMBCD((date >> 8) & 0xff);
dt.dt_year = FROMBCD((date >> 16) & 0xff);
dt.dt_year += 100 * FROMBCD((date >> 24) & 0xff);
tv->tv_sec = clock_ymdhms_to_secs(&dt);
tv->tv_usec = 0;
return 0;
}
int
opal_settime(struct todr_chip_handle *ch, struct timeval *tv)
{
struct clock_ymdhms dt;
uint64_t time = 0;
uint32_t date = 0;
int64_t error;
clock_secs_to_ymdhms(tv->tv_sec, &dt);
time |= (uint64_t)TOBCD(dt.dt_sec) << 40;
time |= (uint64_t)TOBCD(dt.dt_min) << 48;
time |= (uint64_t)TOBCD(dt.dt_hour) << 56;
date |= (uint32_t)TOBCD(dt.dt_day);
date |= (uint32_t)TOBCD(dt.dt_mon) << 8;
date |= (uint32_t)TOBCD(dt.dt_year) << 16;
date |= (uint32_t)TOBCD(dt.dt_year / 100) << 24;
do {
error = opal_rtc_write(date, time);
if (error == OPAL_BUSY_EVENT)
opal_poll_events(NULL);
} while (error == OPAL_BUSY_EVENT);
if (error != OPAL_SUCCESS)
return EIO;
return 0;
}
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