/*      $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;
       }
}

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