minix/sys/arch/i386/stand/lib/netif/ne.c

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/* $NetBSD: ne.c,v 1.7 2008/12/14 18:46:33 christos Exp $ */
/*-
* Copyright (c) 1997, 1998 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* 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.
*/
/*
* Device driver for National Semiconductor DS8390/WD83C690 based ethernet
* adapters.
*
* Copyright (c) 1994, 1995 Charles M. Hannum. All rights reserved.
*
* Copyright (C) 1993, David Greenman. This software may be used, modified,
* copied, distributed, and sold, in both source and binary form provided that
* the above copyright and these terms are retained. Under no circumstances is
* the author responsible for the proper functioning of this software, nor does
* the author assume any responsibility for damages incurred with its use.
*/
/*
* this code is mainly obtained from /sys/dev/ic/ne2000.c .
*/
#include <sys/types.h>
#include <machine/pio.h>
#include <lib/libsa/stand.h>
#include <libi386.h>
#ifdef _STANDALONE
#include <lib/libkern/libkern.h>
#include <bootinfo.h>
#endif
#include "etherdrv.h"
#include <dev/ic/dp8390reg.h>
#include <dev/ic/ne2000reg.h>
#include "dp8390.h"
#include "ne.h"
#ifndef BASEREG
#define BASEREG 0x300
#endif
#define NE_BASEREG BASEREG
#define NE_ASIC_BASEREG (NE_BASEREG+NE2000_ASIC_OFFSET)
#define NIC_PORT(x) (NE_BASEREG + (x))
#define NIC_INB(x) inb(NIC_PORT(x))
#define NIC_OUTB(x, b) outb(NIC_PORT(x), (b))
#define NE_16BIT
#define DELAY(x) delay(x)
#define ASIC_PORT(x) (NE_ASIC_BASEREG + (x))
#define ASIC_INB(x) inb(ASIC_PORT(x))
#define ASIC_INW(x) inw(ASIC_PORT(x))
#define ASIC_OUTB(x, b) outb(ASIC_PORT(x), (b))
#define ASIC_OUTW(x, b) outw(ASIC_PORT(x), (b))
u_char eth_myaddr[6];
#ifdef _STANDALONE
static struct btinfo_netif bi_netif;
#endif
int
EtherInit(unsigned char *myadr)
{
uint8_t tmp;
int i;
printf("ne: trying iobase=0x%x\n", NE_BASEREG);
dp8390_iobase = NE_BASEREG;
dp8390_membase = dp8390_memsize = 8192*2;
dp8390_cr_proto = ED_CR_RD2;
dp8390_dcr_reg = ED_DCR_FT1 | ED_DCR_LS
#ifdef NE_16BIT
| ED_DCR_WTS
#endif
;
/* reset */
tmp = ASIC_INB(NE2000_ASIC_RESET);
DELAY(10000);
ASIC_OUTB(NE2000_ASIC_RESET, tmp);
DELAY(5000);
NIC_OUTB(ED_P0_CR, ED_CR_RD2 | ED_CR_PAGE_0 | ED_CR_STP);
DELAY(5000);
tmp = NIC_INB(ED_P0_CR);
if ((tmp & (ED_CR_RD2 | ED_CR_TXP | ED_CR_STA | ED_CR_STP)) !=
(ED_CR_RD2 | ED_CR_STP)) {
goto out;
}
tmp = NIC_INB(ED_P0_ISR);
if ((tmp & ED_ISR_RST) != ED_ISR_RST) {
goto out;
}
NIC_OUTB(ED_P0_CR, ED_CR_RD2 | ED_CR_PAGE_0 | ED_CR_STA);
for (i = 0; i < 100; i++) {
if ((NIC_INB(ED_P0_ISR) & ED_ISR_RST) ==
ED_ISR_RST) {
/* Ack the reset bit. */
NIC_OUTB(ED_P0_ISR, ED_ISR_RST);
break;
}
DELAY(100);
}
printf("ne: found\n");
/*
* This prevents packets from being stored in the NIC memory when
* the readmem routine turns on the start bit in the CR.
*/
NIC_OUTB(ED_P0_RCR, ED_RCR_MON);
/* Temporarily initialize DCR for byte operations. */
NIC_OUTB(ED_P0_DCR, ED_DCR_FT1 | ED_DCR_LS);
NIC_OUTB(ED_P0_PSTART, 8192 >> ED_PAGE_SHIFT);
NIC_OUTB(ED_P0_PSTOP, 16384 >> ED_PAGE_SHIFT);
#ifdef HWADDR
for (i = 0; i < 6; i++)
myadr[i] = eth_myaddr[i] = HWADDR[i];
#else
{
uint8_t romdata[16];
ne2000_readmem(0, romdata, 16);
for (i = 0; i < 6; i++)
myadr[i] = eth_myaddr[i] = romdata[i*2];
}
#endif
if (dp8390_config())
goto out;
#ifdef _STANDALONE
strncpy(bi_netif.ifname, "ne", sizeof(bi_netif.ifname));
bi_netif.bus = BI_BUS_ISA;
bi_netif.addr.iobase = NE_BASEREG;
BI_ADD(&bi_netif, BTINFO_NETIF, sizeof(bi_netif));
#endif
return 1;
out:
return 0;
}
void
EtherStop(void) {
uint8_t tmp;
dp8390_stop();
tmp = ASIC_INB(NE2000_ASIC_RESET);
DELAY(10000);
ASIC_OUTB(NE2000_ASIC_RESET, tmp);
DELAY(5000);
NIC_OUTB(ED_P0_CR, ED_CR_RD2 | ED_CR_PAGE_0 | ED_CR_STP);
DELAY(5000);
}
void
ne2000_writemem(uint8_t *src, int dst, size_t len)
{
size_t i;
int maxwait = 100; /* about 120us */
/* Select page 0 registers. */
NIC_OUTB(ED_P0_CR, ED_CR_RD2 | ED_CR_PAGE_0 | ED_CR_STA);
/* Reset remote DMA complete flag. */
NIC_OUTB(ED_P0_ISR, ED_ISR_RDC);
/* Set up DMA byte count. */
NIC_OUTB(ED_P0_RBCR0, len);
NIC_OUTB(ED_P0_RBCR1, len >> 8);
/* Set up destination address in NIC mem. */
NIC_OUTB(ED_P0_RSAR0, dst);
NIC_OUTB(ED_P0_RSAR1, dst >> 8);
/* Set remote DMA write. */
NIC_OUTB(ED_P0_CR, ED_CR_RD1 | ED_CR_PAGE_0 | ED_CR_STA);
#ifdef NE_16BIT
for (i = 0; i < len; i += 2, src += 2)
ASIC_OUTW(NE2000_ASIC_DATA, *(uint16_t *)src);
#else
for (i = 0; i < len; i++)
ASIC_OUTB(NE2000_ASIC_DATA, *src++);
#endif
/*
* Wait for remote DMA to complete. This is necessary because on the
* transmit side, data is handled internally by the NIC in bursts, and
* we can't start another remote DMA until this one completes. Not
* waiting causes really bad things to happen - like the NIC wedging
* the bus.
*/
while (((NIC_INB(ED_P0_ISR) & ED_ISR_RDC) != ED_ISR_RDC) && --maxwait)
DELAY(1);
if (maxwait == 0)
printf("ne2000_writemem: failed to complete\n");
}
void
ne2000_readmem(int src, uint8_t *dst, size_t amount)
{
size_t i;
/* Select page 0 registers. */
NIC_OUTB(ED_P0_CR, ED_CR_RD2 | ED_CR_PAGE_0 | ED_CR_STA);
/* Round up to a word. */
if (amount & 1)
++amount;
/* Set up DMA byte count. */
NIC_OUTB(ED_P0_RBCR0, amount);
NIC_OUTB(ED_P0_RBCR1, amount >> 8);
/* Set up source address in NIC mem. */
NIC_OUTB(ED_P0_RSAR0, src);
NIC_OUTB(ED_P0_RSAR1, src >> 8);
NIC_OUTB(ED_P0_CR, ED_CR_RD0 | ED_CR_PAGE_0 | ED_CR_STA);
#ifdef NE_16BIT
for (i = 0; i < amount; i += 2, dst += 2)
*(uint16_t *)dst = ASIC_INW(NE2000_ASIC_DATA);
#else
for (i = 0; i < amount; i++)
*dst++ = ASIC_INB(NE2000_ASIC_DATA);
#endif
}