/* $NetBSD: if_le_ibus.c,v 1.13 2008/04/04 12:25:06 tsutsui Exp $ */
/*
* Copyright 1996 The Board of Trustees of The Leland Stanford
* Junior University. All Rights Reserved.
*
* Permission to use, copy, modify, and distribute this
* software and its documentation for any purpose and without
* fee is hereby granted, provided that the above copyright
* notice appear in all copies. Stanford University
* makes no representations about the suitability of this
* software for any purpose. It is provided "as is" without
* express or implied warranty.
*
* This driver was contributed by Jonathan Stone.
*/
/*
* LANCE on Decstation kn01/kn220(?) baseboard.
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: if_le_ibus.c,v 1.13 2008/04/04 12:25:06 tsutsui Exp $");
#include "opt_inet.h"
#include <sys/param.h>
#include <sys/socket.h>
#include <sys/systm.h>
#include <sys/device.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 <dev/ic/lancevar.h>
#include <dev/ic/am7990var.h>
#include <dev/tc/if_levar.h>
#include <pmax/ibus/ibusvar.h>
#include <pmax/pmax/kn01.h>
static void le_dec_copyfrombuf_gap2(struct lance_softc *, void *, int, int);
static void le_dec_copytobuf_gap2(struct lance_softc *, void *, int, int);
static void le_dec_zerobuf_gap2(struct lance_softc *, int, int);
static int le_pmax_match(device_t, cfdata_t, void *);
static void le_pmax_attach(device_t, device_t, void *);
CFATTACH_DECL_NEW(le_pmax, sizeof(struct le_softc),
le_pmax_match, le_pmax_attach, NULL, NULL);
int
le_pmax_match(device_t parent, cfdata_t cf, void *aux)
{
struct ibus_attach_args *d = aux;
if (strcmp("lance", d->ia_name) != 0)
return (0);
return (1);
}
void
le_pmax_attach(device_t parent, device_t self, void *aux)
{
struct le_softc *lesc = device_private(self);
struct lance_softc *sc = &lesc->sc_am7990.lsc;
uint8_t *cp;
struct ibus_attach_args *ia = aux;
/*
* It's on the baseboard, with a dedicated interrupt line.
*/
sc->sc_dev = self;
lesc->sc_r1 = (struct lereg1 *)(ia->ia_addr);
sc->sc_mem = (void *)MIPS_PHYS_TO_KSEG1(KN01_SYS_LANCE_B_START);
cp = (uint8_t *)(MIPS_PHYS_TO_KSEG1(KN01_SYS_CLOCK) + 1);
sc->sc_copytodesc = le_dec_copytobuf_gap2;
sc->sc_copyfromdesc = le_dec_copyfrombuf_gap2;
sc->sc_copytobuf = le_dec_copytobuf_gap2;
sc->sc_copyfrombuf = le_dec_copyfrombuf_gap2;
sc->sc_zerobuf = le_dec_zerobuf_gap2;
dec_le_common_attach(&lesc->sc_am7990, cp);
ibus_intr_establish(parent, (void *)ia->ia_cookie, IPL_NET,
am7990_intr, sc);
}
/*
* 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
le_dec_copytobuf_gap2(struct lance_softc *sc, void *fromv, int boff, int len)
{
volatile uint8_t *buf = sc->sc_mem;
uint8_t *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
le_dec_copyfrombuf_gap2(struct lance_softc *sc, void *tov, int boff, int len)
{
volatile void *buf = sc->sc_mem;
uint8_t *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;
}
static void
le_dec_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;
}
}
