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/* $OpenBSD: if_le_dec.c,v 1.4 2007/06/18 21:24:43 jasper Exp $ */
/* $NetBSD: if_le_dec.c,v 1.12 2001/11/13 12:49:45 lukem Exp $ */
/*-
* Copyright (c) 1997 Jonathan Stone. All rights reserved.
* Copyright (c) 1995 Charles M. Hannum. All rights reserved.
* 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/param.h>
#include <sys/systm.h>
#include <sys/mbuf.h>
#include <sys/syslog.h>
#include <sys/socket.h>
#include <sys/device.h>
#include <net/if.h>
#include <net/if_media.h>
#ifdef INET
#include <netinet/in.h>
#include <netinet/if_ether.h>
#endif
#include <dev/ic/am7990reg.h>
#include <dev/ic/am7990var.h>
#include <dev/tc/if_levar.h>
#include <dev/tc/tcvar.h>
#include <machine/bus.h>
/* access LANCE registers */
void le_dec_writereg(volatile u_short *regptr, u_short val);
#define LERDWR(cntl, src, dst) { (dst) = (src); tc_mb(); }
#define LEWREG(src, dst) le_dec_writereg(&(dst), (src))
void le_dec_wrcsr(struct am7990_softc *, u_int16_t, u_int16_t);
u_int16_t le_dec_rdcsr(struct am7990_softc *, u_int16_t);
void
dec_le_common_attach(struct am7990_softc *sc, u_char *eap)
{
int i;
sc->sc_rdcsr = le_dec_rdcsr;
sc->sc_wrcsr = le_dec_wrcsr;
sc->sc_hwinit = NULL;
sc->sc_conf3 = 0;
sc->sc_addr = 0;
sc->sc_memsize = 65536;
/*
* Get the ethernet address out of rom
*/
for (i = 0; i < sizeof(sc->sc_arpcom.ac_enaddr); i++) {
sc->sc_arpcom.ac_enaddr[i] = *eap;
eap += 4;
}
am7990_config(sc);
}
void
le_dec_wrcsr(struct am7990_softc *sc, u_int16_t port, u_int16_t val)
{
struct lereg1 *ler1 = ((struct le_softc *)sc)->sc_r1;
LEWREG(port, ler1->ler1_rap);
LERDWR(port, val, ler1->ler1_rdp);
}
u_int16_t
le_dec_rdcsr(struct am7990_softc *sc, u_int16_t port)
{
struct lereg1 *ler1 = ((struct le_softc *)sc)->sc_r1;
u_int16_t val;
LEWREG(port, ler1->ler1_rap);
LERDWR(0, ler1->ler1_rdp, val);
return (val);
}
/*
* Write a lance register port, reading it back to ensure success. This seems
* to be necessary during initialization, since the chip appears to be a bit
* pokey sometimes.
*/
void
le_dec_writereg(volatile u_short *regptr, u_short val)
{
int i = 0;
while (*regptr != val) {
*regptr = val;
tc_mb();
if (++i > 10000) {
printf("le: Reg did not settle (to x%x): x%x\n", val,
*regptr);
return;
}
DELAY(100);
}
}
/*
* Routines for accessing the transmit and receive buffers are provided
* by am7990.c, because of the LE_NEED_BUF_* macros defined above.
* Unfortunately, CPU addressing of these buffers is done in one of
* 3 ways:
* - contiguous (for the 3max and turbochannel option card)
* - gap2, which means shorts (2 bytes) interspersed with short (2 byte)
* spaces (for the pmax, vax 3400, and ioasic LANCE descriptors)
* - gap16, which means 16bytes interspersed with 16byte spaces
* for buffers which must begin on a 32byte boundary (for 3min, maxine,
* and alpha)
* The buffer offset is the logical byte offset, assuming contiguous storage.
*/
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