/*      $NetBSD: if_le.c,v 1.37 2010/12/14 23:38:30 matt Exp $  */

/*-
 * Copyright (c) 1997, 1998 The NetBSD Foundation, Inc.
 * All rights reserved.
 *
 * This code is derived from software contributed to The NetBSD Foundation
 * by Charles M. Hannum and by Jason R. Thorpe of the Numerical Aerospace
 * Simulation Facility, NASA Ames Research Center.
 *
 * 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.
 */

/*-
 * Copyright (c) 1992, 1993
 *      The Regents of the University of California.  All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * Ralph Campbell and Rick Macklem.
 *
 * 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_le.c     8.2 (Berkeley) 11/16/93
 */

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: if_le.c,v 1.37 2010/12/14 23:38:30 matt Exp $");

#include "opt_inet.h"

#include <sys/param.h>
#include <sys/cpu.h>
#include <sys/device.h>
#include <sys/syslog.h>
#include <sys/socket.h>

#include <uvm/uvm_extern.h>

#include <net/if.h>
#include <net/if_ether.h>
#include <net/if_media.h>

#ifdef INET
#include <netinet/in.h>
#include <netinet/if_inarp.h>
#endif

#include <machine/nexus.h>
#include <machine/scb.h>
#include <machine/mainbus.h>

#include <dev/ic/lancereg.h>
#include <dev/ic/lancevar.h>
#include <dev/ic/am7990reg.h>
#include <dev/ic/am7990var.h>

#include "ioconf.h"

#define LE_VEC  0xd4    /* Interrupt vector on 3300/3400 */

#define LE_CSR  0x20084400
#define LE_ROM  0x20084200
#define LE_RAM  0x20120000

struct le_softc {
        struct  am7990_softc sc_am7990; /* Must be first */
        struct  evcnt sc_intrcnt;
        volatile uint16_t *sc_rap;
        volatile uint16_t *sc_rdp;
};

static int      le_mainbus_match(device_t, cfdata_t, void *);
static void     le_mainbus_attach(device_t, device_t, void *);
static void     lewrcsr(struct lance_softc *, uint16_t, uint16_t);
static uint16_t lerdcsr(struct lance_softc *, uint16_t);
static void     lance_copytobuf_gap2(struct lance_softc *, void *, int, int);
static void     lance_copyfrombuf_gap2(struct lance_softc *, void *, int, int);
static void     lance_zerobuf_gap2(struct lance_softc *, int, int);

CFATTACH_DECL_NEW(le_mainbus, sizeof(struct le_softc),
    le_mainbus_match, le_mainbus_attach, NULL, NULL);

void
lewrcsr(struct lance_softc *ls, uint16_t port, uint16_t val)
{
        struct le_softc * const sc = (void *)ls;

        *sc->sc_rap = port;
        *sc->sc_rdp = val;
}

uint16_t
lerdcsr(struct lance_softc *ls, uint16_t port)
{
        struct le_softc * const sc = (void *)ls;

        *sc->sc_rap = port;
        return *sc->sc_rdp;
}

int
le_mainbus_match(device_t parent, cfdata_t cf, void *aux)
{
        struct mainbus_attach_args * const ma = aux;
        int found;
        vaddr_t va;

        if (strcmp("lance", ma->ma_type))
                return 0;

        va = vax_map_physmem(LE_CSR, 1);
        found = (badaddr((void *)va, 2) == 0);
        vax_unmap_physmem(va, 1);

        return found;
}

void
le_mainbus_attach(device_t parent, device_t self, void *aux)
{
        struct le_softc * const sc = device_private(self);
        int *lance_addr;
        int i, vec, br;

        sc->sc_am7990.lsc.sc_dev = self;
        sc->sc_rdp = (uint16_t *)vax_map_physmem(LE_CSR, 1);
        sc->sc_rap = sc->sc_rdp + 2;

        /*
         * Set interrupt vector, by forcing an interrupt.
         */
        scb_vecref(0, 0); /* Clear vector ref */
        *sc->sc_rap = LE_CSR0;
        *sc->sc_rdp = LE_C0_STOP;
        DELAY(100);
        *sc->sc_rdp = LE_C0_INIT|LE_C0_INEA;
        DELAY(100000);
        i = scb_vecref(&vec, &br);
        if (i == 0 || vec == 0)
                return;

        scb_vecalloc(vec, (void (*)(void *))am7990_intr, sc,
                SCB_ISTACK, &sc->sc_intrcnt);
        evcnt_attach_dynamic(&sc->sc_intrcnt, EVCNT_TYPE_INTR, NULL,
                device_xname(self), "intr");

        aprint_normal(": vec %o ipl %x\n%s", vec, br, device_xname(self));
        /*
         * MD functions.
         */
        sc->sc_am7990.lsc.sc_rdcsr = lerdcsr;
        sc->sc_am7990.lsc.sc_wrcsr = lewrcsr;
        sc->sc_am7990.lsc.sc_nocarrier = NULL;

        sc->sc_am7990.lsc.sc_mem =
            (void *)uvm_km_alloc(kernel_map, (128 * 1024), 0, UVM_KMF_VAONLY);
        if (sc->sc_am7990.lsc.sc_mem == 0)
                return;

        ioaccess((vaddr_t)sc->sc_am7990.lsc.sc_mem, LE_RAM,
            (128 * 1024) >> VAX_PGSHIFT);

        
        sc->sc_am7990.lsc.sc_addr = 0;
        sc->sc_am7990.lsc.sc_memsize = (64 * 1024);

        sc->sc_am7990.lsc.sc_copytodesc = lance_copytobuf_gap2;
        sc->sc_am7990.lsc.sc_copyfromdesc = lance_copyfrombuf_gap2;
        sc->sc_am7990.lsc.sc_copytobuf = lance_copytobuf_gap2;
        sc->sc_am7990.lsc.sc_copyfrombuf = lance_copyfrombuf_gap2;
        sc->sc_am7990.lsc.sc_zerobuf = lance_zerobuf_gap2;

        /*
         * Get the ethernet address out of rom
         */
        lance_addr = (int *)vax_map_physmem(LE_ROM, 1);
        for (i = 0; i < 6; i++)
                sc->sc_am7990.lsc.sc_enaddr[i] = (u_char)lance_addr[i];
        vax_unmap_physmem((vaddr_t)lance_addr, 1);

        memcpy(sc->sc_am7990.lsc.sc_ethercom.ec_if.if_xname, device_xname(self),
            IFNAMSIZ);
        am7990_config(&sc->sc_am7990);
}

/*
 * gap2: two bytes of data followed by two bytes of pad.
 *
 * Buffers must be 4-byte aligned.  The code doesn't worry about
 * doing an extra byte.
 */

void
lance_copytobuf_gap2(struct lance_softc *sc, void *fromv, int boff, int len)
{
        volatile void *buf = sc->sc_mem;
        char *from = fromv;
        volatile uint16_t *bptr;

        if (boff & 0x1) {
                /* handle unaligned first byte */
                bptr = ((volatile uint16_t *)buf) + (boff - 1);
                *bptr = (*from++ << 8) | (*bptr & 0xff);
                bptr += 2;
                len--;
        } else
                bptr = ((volatile uint16_t *)buf) + boff;
        while (len > 1) {
                *bptr = (from[1] << 8) | (from[0] & 0xff);
                bptr += 2;
                from += 2;
                len -= 2;
        }
        if (len == 1)
                *bptr = (uint16_t)*from;
}

void
lance_copyfrombuf_gap2(struct lance_softc *sc, void *tov, int boff, int len)
{
        volatile void *buf = sc->sc_mem;
        char *to = tov;
        volatile uint16_t *bptr;
        uint16_t tmp;

        if (boff & 0x1) {
                /* handle unaligned first byte */
                bptr = ((volatile uint16_t *)buf) + (boff - 1);
                *to++ = (*bptr >> 8) & 0xff;
                bptr += 2;
                len--;
        } else
                bptr = ((volatile uint16_t *)buf) + boff;
        while (len > 1) {
                tmp = *bptr;
                *to++ = tmp & 0xff;
                *to++ = (tmp >> 8) & 0xff;
                bptr += 2;
                len -= 2;
        }
        if (len == 1)
                *to = *bptr & 0xff;
}

void
lance_zerobuf_gap2(struct lance_softc *sc, int boff, int len)
{
        volatile void *buf = sc->sc_mem;
        volatile uint16_t *bptr;

        if ((unsigned int)boff & 0x1) {
                bptr = ((volatile uint16_t *)buf) + (boff - 1);
                *bptr &= 0xff;
                bptr += 2;
                len--;
        } else
                bptr = ((volatile uint16_t *)buf) + boff;
        while (len > 0) {
                *bptr = 0;
                bptr += 2;
                len -= 2;
        }
}