/*      $NetBSD: octeon_asx.c,v 1.5 2021/01/04 17:22:59 thorpej Exp $   */

/*
 * Copyright (c) 2007 Internet Initiative Japan, Inc.
 * 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.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``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 REGENTS 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 <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: octeon_asx.c,v 1.5 2021/01/04 17:22:59 thorpej Exp $");

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kmem.h>
#include <mips/cavium/octeonvar.h>
#include <mips/cavium/dev/octeon_asxreg.h>
#include <mips/cavium/dev/octeon_asxvar.h>

/* XXX */
void
octasx_init(struct octasx_attach_args *aa, struct octasx_softc **rsc)
{
        struct octasx_softc *sc;
        int status;

        sc = kmem_zalloc(sizeof(*sc), KM_SLEEP);
        if (sc == NULL)
                panic("can't allocate memory: %s", __func__);

        sc->sc_port = aa->aa_port;
        sc->sc_regt = aa->aa_regt;

        status = bus_space_map(sc->sc_regt, ASX0_BASE, ASX0_SIZE, 0,
            &sc->sc_regh);
        if (status != 0)
                panic("can't map %s space", "asx register");

        *rsc = sc;
}

#define _ASX_RD8(sc, off) \
        bus_space_read_8((sc)->sc_regt, (sc)->sc_regh, (off))
#define _ASX_WR8(sc, off, v) \
        bus_space_write_8((sc)->sc_regt, (sc)->sc_regh, (off), (v))

static int      octasx_enable_tx(struct octasx_softc *, int);
static int      octasx_enable_rx(struct octasx_softc *, int);

int
octasx_enable(struct octasx_softc *sc, int enable)
{

        octasx_enable_tx(sc, enable);
        octasx_enable_rx(sc, enable);
        return 0;
}

static int
octasx_enable_tx(struct octasx_softc *sc, int enable)
{
        uint64_t asx_tx_port;

        asx_tx_port = _ASX_RD8(sc, ASX0_TX_PRT_EN_OFFSET);
        if (enable)
                SET(asx_tx_port, __BIT(sc->sc_port));
        else
                CLR(asx_tx_port, __BIT(sc->sc_port));
        _ASX_WR8(sc, ASX0_TX_PRT_EN_OFFSET, asx_tx_port);
        return 0;
}

static int
octasx_enable_rx(struct octasx_softc *sc, int enable)
{
        uint64_t asx_rx_port;

        asx_rx_port = _ASX_RD8(sc, ASX0_RX_PRT_EN_OFFSET);
        if (enable)
                SET(asx_rx_port, __BIT(sc->sc_port));
        else
                CLR(asx_rx_port, __BIT(sc->sc_port));
        _ASX_WR8(sc, ASX0_RX_PRT_EN_OFFSET, asx_rx_port);
        return 0;
}

int
octasx_clk_set(struct octasx_softc *sc, int tx_setting, int rx_setting)
{

        _ASX_WR8(sc, ASX0_TX_CLK_SET0_OFFSET + 8 * sc->sc_port, tx_setting);
        _ASX_WR8(sc, ASX0_RX_CLK_SET0_OFFSET + 8 * sc->sc_port, rx_setting);
        return 0;
}