/*      $OpenBSD: vrtc.c,v 1.3 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.
 */

#include <sys/param.h>
#include <sys/device.h>
#include <sys/malloc.h>
#include <sys/systm.h>

#include <machine/autoconf.h>
#include <machine/hypervisor.h>
#include <machine/openfirm.h>

#include <dev/clock_subr.h>
#include <sparc64/dev/vbusvar.h>

extern todr_chip_handle_t todr_handle;

int     vrtc_match(struct device *, void *, void *);
void    vrtc_attach(struct device *, struct device *, void *);

const struct cfattach vrtc_ca = {
        sizeof(struct device), vrtc_match, vrtc_attach
};

struct cfdriver vrtc_cd = {
        NULL, "vrtc", DV_DULL
};

int     vrtc_gettime(todr_chip_handle_t, struct timeval *);
int     vrtc_settime(todr_chip_handle_t, struct timeval *);

int
vrtc_match(struct device *parent, void *match, void *aux)
{
        struct vbus_attach_args *va = aux;

        if (strcmp(va->va_name, "rtc") == 0)
                return (1);

        return (0);
}

void
vrtc_attach(struct device *parent, struct device *self, void *aux)
{
        todr_chip_handle_t handle;

        printf("\n");

        handle = malloc(sizeof(struct todr_chip_handle), M_DEVBUF,M_NOWAIT);
        if (handle == NULL)
                panic("couldn't allocate todr_handle");

        handle->cookie = self;
        handle->todr_gettime = vrtc_gettime;
        handle->todr_settime = vrtc_settime;
        handle->bus_cookie = NULL;
        handle->todr_setwen = NULL;
        handle->todr_quality = 0;
        todr_handle = handle;
}

int
vrtc_gettime(todr_chip_handle_t handle, struct timeval *tv)
{
        u_int64_t tod;

        if (hv_tod_get(&tod) != H_EOK)
                return (1);

        tv->tv_sec = tod;
        tv->tv_usec = 0;
        return (0);
}

int
vrtc_settime(todr_chip_handle_t handle, struct timeval *tv)
{
        if (hv_tod_set(tv->tv_sec) != H_EOK)
                return (1);

        return (0);
}