/*      $OpenBSD: lsi64854var.h,v 1.7 2008/06/26 05:42:15 ray Exp $     */
/*      $NetBSD: lsi64854var.h,v 1.4 2001/03/29 02:58:39 petrov Exp $ */

/*-
 * Copyright (c) 1998 The NetBSD Foundation, Inc.
 * All rights reserved.
 *
 * This code is derived from software contributed to The NetBSD Foundation
 * by Paul Kranenburg.
 *
 * 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
 */

struct lsi64854_softc {
        struct device           sc_dev;         /* base device */
        bus_space_tag_t         sc_bustag;      /* bus tags */
        bus_dma_tag_t           sc_dmatag;

        bus_space_handle_t      sc_regs;        /* the registers */
        u_int                   sc_rev;         /* revision */
        int                     sc_burst;       /* max supported burst size */

        int                     sc_channel;
#define L64854_CHANNEL_SCSI     1
#define L64854_CHANNEL_ENET     2
#define L64854_CHANNEL_PP       3
        void                    *sc_client;

        int                     sc_active;      /* DMA active ? */
        bus_dmamap_t            sc_dmamap;      /* DMA map for bus_dma_* */
        caddr_t                 sc_dvmaaddr;    /* DVMA cookie */
        size_t                  sc_dmasize;
        caddr_t                 *sc_dmaaddr;
        size_t                  *sc_dmalen;

        void    (*reset)(struct lsi64854_softc *);/* reset routine */
        int     (*setup)(struct lsi64854_softc *, caddr_t *, size_t *,
                              int, size_t *);   /* dma setup */
        int     (*intr)(void *);                /* interrupt handler */

        int     (*sc_intrchain)(void *);        /* next handler in intr chain */
        void    *sc_intrchainarg;               /* arg for next intr handler */

        u_int                   sc_dmactl;
};

#define L64854_GCSR(sc) \
        (bus_space_read_4((sc)->sc_bustag, (sc)->sc_regs, L64854_REG_CSR))

#define L64854_SCSR(sc, csr)    \
        bus_space_write_4((sc)->sc_bustag, (sc)->sc_regs, L64854_REG_CSR, csr)


/*
 * DMA engine interface functions.
 */
#define DMA_RESET(sc)                   (((sc)->reset)(sc))
#define DMA_INTR(sc)                    (((sc)->intr)(sc))
#define DMA_SETUP(sc, a, l, d, s)       (((sc)->setup)(sc, a, l, d, s))

#define DMA_ISACTIVE(sc)                ((sc)->sc_active)

#define DMA_ENINTR(sc) do {                     \
        u_int32_t csr = L64854_GCSR(sc);        \
        csr |= L64854_INT_EN;                   \
        L64854_SCSR(sc, csr);                   \
} while (0)

#define DMA_ISINTR(sc)  (L64854_GCSR(sc) & (D_INT_PEND|D_ERR_PEND))

#define DMA_GO(sc) do {                         \
        u_int32_t csr = L64854_GCSR(sc);        \
        csr |= D_EN_DMA;                        \
        L64854_SCSR(sc, csr);                   \
        sc->sc_active = 1;                      \
} while (0)


int     lsi64854_attach(struct lsi64854_softc *);
int     lsi64854_enet_intr(void *);