/*      $OpenBSD: lance.h,v 1.1 2013/10/28 22:13:12 miod Exp $  */
/*      $NetBSD: lance.h,v 1.1 2013/01/13 14:10:55 tsutsui Exp $ */

/*-
 * Copyright (c) 1982, 1992, 1993
 *      The Regents of the University of California.  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.
 * 3. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * 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.
 *
 * @(#)if_lereg.h       8.2 (Berkeley) 10/30/93
 */

#define LEMTU           1518
#define LEMINSIZE       60      /* should be 64 if mode DTCR is set */
#define LERBUF          8
#define LERBUFLOG2      3
#define LE_RLEN         (LERBUFLOG2 << 13)
#define LE_NEXTRMD(x)   (((x) + 1) & (LERBUF - 1))
#define LETBUF          1
#define LETBUFLOG2      0
#define LE_TLEN         (LETBUFLOG2 << 13)
#define LE_NEXTTMD(x)   (((x) + 1) & (LETBUF - 1))

/* Local Area Network Controller for Ethernet (LANCE) registers */
struct lereg {
        volatile uint16_t       ler_rdp;        /* register data port */
        uint16_t unused;
        volatile uint16_t       ler_rap;        /* register address port */
};

/*
 * lance memory
 */

/* receive message descriptors. bits/hadr are byte order dependent. */
struct  lermd_v {
        volatile uint16_t rmd0;         /* low address of packet */
#if BYTE_ORDER == BIG_ENDIAN
        volatile uint8_t  rmd1_bits;    /* descriptor bits */
        volatile uint8_t  rmd1_hadr;    /* high address of packet */
#else
        volatile uint8_t  rmd1_hadr;    /* high address of packet */
        volatile uint8_t  rmd1_bits;    /* descriptor bits */
#endif
        volatile int16_t  rmd2;         /* buffer byte count */
        volatile uint16_t rmd3;         /* message byte count */
};

/* transmit message descriptors */
struct  letmd_v {
        volatile uint16_t tmd0;         /* low address of packet */
#if BYTE_ORDER == BIG_ENDIAN
        volatile uint8_t  tmd1_bits;    /* descriptor bits */
        volatile uint8_t  tmd1_hadr;    /* high address of packet */
#else
        volatile uint8_t  tmd1_hadr;    /* high address of packet */
        volatile uint8_t  tmd1_bits;    /* descriptor bits */
#endif
        volatile int16_t  tmd2;         /* buffer byte count */
        volatile uint16_t tmd3;         /* transmit error bits */
};

struct lemem {
        /* initialization block */
        volatile uint16_t       lem_mode;       /* mode */
        volatile uint16_t       lem_padr[3];    /* physical address */
        volatile uint16_t       lem_ladrf[4];   /* logical address filter */
        volatile uint16_t       lem_rdra;       /* receive descriptor addr */
        volatile uint16_t       lem_rlen;       /* rda high and ring size */
        volatile uint16_t       lem_tdra;       /* transmit descriptor addr */
        volatile uint16_t       lem_tlen;       /* tda high and ring size */
        uint16_t                lem_pad0[4];
        struct lermd_v          lem_rmd[LERBUF];
        struct letmd_v          lem_tmd[LETBUF];
        volatile uint8_t        lem_rbuf[LERBUF][LEMTU];
        volatile uint8_t        lem_tbuf[LETBUF][LEMTU];
};

struct le_softc {
        struct lereg *sc_reg;
        struct lemem *sc_mem;
        uint8_t sc_enaddr[6];
        int sc_curtmd;
        int sc_currmd;
};