/* $NetBSD: ne2000.c,v 1.79 2024/05/21 08:04:20 andvar 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.
*/
/*
* Common code shared by all NE2000-compatible Ethernet interfaces.
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: ne2000.c,v 1.79 2024/05/21 08:04:20 andvar Exp $");
#include "rtl80x9.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/device.h>
#include <sys/socket.h>
#include <sys/mbuf.h>
#include <sys/syslog.h>
#include <net/if.h>
#include <net/if_dl.h>
#include <net/if_types.h>
#include <net/if_media.h>
#include <net/if_ether.h>
#include <sys/bswap.h>
#include <sys/bus.h>
#ifndef __BUS_SPACE_HAS_STREAM_METHODS
#define bus_space_write_stream_2 bus_space_write_2
#define bus_space_write_multi_stream_2 bus_space_write_multi_2
#define bus_space_read_multi_stream_2 bus_space_read_multi_2
#endif /* __BUS_SPACE_HAS_STREAM_METHODS */
#include <dev/ic/dp8390reg.h>
#include <dev/ic/dp8390var.h>
#include <dev/ic/ne2000reg.h>
#include <dev/ic/ne2000var.h>
#include <dev/ic/rtl80x9reg.h>
#include <dev/ic/rtl80x9var.h>
#include <dev/ic/ax88190reg.h>
static int ne2000_write_mbuf(struct dp8390_softc *, struct mbuf *, int);
static int ne2000_ring_copy(struct dp8390_softc *, int, void *, u_short);
static void ne2000_read_hdr(struct dp8390_softc *, int,
struct dp8390_ring *);
static int ne2000_test_mem(struct dp8390_softc *);
static void ne2000_writemem(bus_space_tag_t, bus_space_handle_t,
bus_space_tag_t, bus_space_handle_t, const uint8_t *, int,
size_t, int, int);
static void ne2000_readmem(bus_space_tag_t, bus_space_handle_t,
bus_space_tag_t, bus_space_handle_t, int, uint8_t *,
size_t, int);
#ifdef NE2000_DETECT_8BIT
static bool ne2000_detect_8bit(bus_space_tag_t, bus_space_handle_t,
bus_space_tag_t, bus_space_handle_t);
#endif
#define ASIC_BARRIER(asict, asich) \
bus_space_barrier((asict), (asich), 0, 0x10, \
BUS_SPACE_BARRIER_READ | BUS_SPACE_BARRIER_WRITE)
int
ne2000_attach(struct ne2000_softc *nsc, uint8_t *myea)
{
struct dp8390_softc *dsc = &nsc->sc_dp8390;
bus_space_tag_t nict = dsc->sc_regt;
bus_space_handle_t nich = dsc->sc_regh;
bus_space_tag_t asict = nsc->sc_asict;
bus_space_handle_t asich = nsc->sc_asich;
uint8_t romdata[16];
int memstart, memsize, i, useword;
/*
* Detect it again unless caller specified it; this gives us
* the memory size.
*/
if (nsc->sc_type == NE2000_TYPE_UNKNOWN)
nsc->sc_type = ne2000_detect(nict, nich, asict, asich);
/*
* 8k of memory for NE1000, 16k for NE2000 and 24k for the
* card uses DL10019.
*/
switch (nsc->sc_type) {
case NE2000_TYPE_UNKNOWN:
default:
aprint_error_dev(dsc->sc_dev, "where did the card go?\n");
return 1;
case NE2000_TYPE_NE1000:
memstart = 8192;
memsize = 8192;
useword = 0;
break;
case NE2000_TYPE_NE2000:
case NE2000_TYPE_AX88190: /* XXX really? */
case NE2000_TYPE_AX88790:
case NE2000_TYPE_AX88796:
#if NRTL80X9 > 0
case NE2000_TYPE_RTL8019:
#endif
memstart = 16384;
memsize = 16384;
useword = 1;
if (
#ifdef NE2000_DETECT_8BIT
ne2000_detect_8bit(nict, nich, asict, asich) ||
#endif
(nsc->sc_quirk & NE2000_QUIRK_8BIT) != 0) {
/* in 8 bit mode, only 8KB memory can be used */
memsize = 8192;
useword = 0;
}
break;
case NE2000_TYPE_DL10019:
case NE2000_TYPE_DL10022:
memstart = 8192 * 3;
memsize = 8192 * 3;
useword = 1;
break;
}
nsc->sc_useword = useword;
#if NRTL80X9 > 0
if (nsc->sc_type == NE2000_TYPE_RTL8019) {
dsc->init_card = rtl80x9_init_card;
dsc->sc_media_init = rtl80x9_media_init;
dsc->sc_mediachange = rtl80x9_mediachange;
dsc->sc_mediastatus = rtl80x9_mediastatus;
}
#endif
dsc->cr_proto = ED_CR_RD2;
if (nsc->sc_type == NE2000_TYPE_AX88190 ||
nsc->sc_type == NE2000_TYPE_AX88790) {
dsc->rcr_proto = ED_RCR_INTT;
dsc->sc_flags |= DP8390_DO_AX88190_WORKAROUND;
} else
dsc->rcr_proto = 0;
/*
* DCR gets:
*
* FIFO threshold to 8, No auto-init Remote DMA,
* byte order=80x86.
*
* NE1000 gets byte-wide DMA, NE2000 gets word-wide DMA.
*/
dsc->dcr_reg = ED_DCR_FT1 | ED_DCR_LS | (useword ? ED_DCR_WTS : 0);
dsc->test_mem = ne2000_test_mem;
dsc->ring_copy = ne2000_ring_copy;
dsc->write_mbuf = ne2000_write_mbuf;
dsc->read_hdr = ne2000_read_hdr;
/* Registers are linear. */
for (i = 0; i < 16; i++)
dsc->sc_reg_map[i] = i;
/*
* NIC memory doesn't start at zero on an NE board.
* The start address is tied to the bus width.
*/
#ifdef GWETHER
{
int x;
int8_t pbuf0[ED_PAGE_SIZE], pbuf[ED_PAGE_SIZE],
tbuf[ED_PAGE_SIZE];
memstart = 0;
for (i = 0; i < ED_PAGE_SIZE; i++)
pbuf0[i] = 0;
/* Search for the start of RAM. */
for (x = 1; x < 256; x++) {
ne2000_writemem(nict, nich, asict, asich, pbuf0,
x << ED_PAGE_SHIFT, ED_PAGE_SIZE, useword, 0);
ne2000_readmem(nict, nich, asict, asich,
x << ED_PAGE_SHIFT, tbuf, ED_PAGE_SIZE, useword);
if (memcmp(pbuf0, tbuf, ED_PAGE_SIZE) == 0) {
for (i = 0; i < ED_PAGE_SIZE; i++)
pbuf[i] = 255 - x;
ne2000_writemem(nict, nich, asict, asich,
pbuf, x << ED_PAGE_SHIFT, ED_PAGE_SIZE,
useword, 0);
ne2000_readmem(nict, nich, asict, asich,
x << ED_PAGE_SHIFT, tbuf, ED_PAGE_SIZE,
useword);
if (memcmp(pbuf, tbuf, ED_PAGE_SIZE) == 0) {
memstart = x << ED_PAGE_SHIFT;
memsize = ED_PAGE_SIZE;
break;
}
}
}
if (memstart == 0) {
aprint_error_dev(dsc->sc_dev,
"cannot find start of RAM\n");
return 1;
}
/* Search for the end of RAM. */
for (++x; x < 256; x++) {
ne2000_writemem(nict, nich, asict, asich, pbuf0,
x << ED_PAGE_SHIFT, ED_PAGE_SIZE, useword, 0);
ne2000_readmem(nict, nich, asict, asich,
x << ED_PAGE_SHIFT, tbuf, ED_PAGE_SIZE, useword);
if (memcmp(pbuf0, tbuf, ED_PAGE_SIZE) == 0) {
for (i = 0; i < ED_PAGE_SIZE; i++)
pbuf[i] = 255 - x;
ne2000_writemem(nict, nich, asict, asich,
pbuf, x << ED_PAGE_SHIFT, ED_PAGE_SIZE,
useword, 0);
ne2000_readmem(nict, nich, asict, asich,
x << ED_PAGE_SHIFT, tbuf, ED_PAGE_SIZE,
useword);
if (memcmp(pbuf, tbuf, ED_PAGE_SIZE) == 0)
memsize += ED_PAGE_SIZE;
else
break;
} else
break;
}
printf("%s: RAM start 0x%x, size %d\n",
device_xname(dsc->sc_dev), memstart, memsize);
}
#endif /* GWETHER */
dsc->mem_start = memstart;
dsc->mem_size = memsize;
if (myea == NULL) {
/* Read the station address. */
if (nsc->sc_type == NE2000_TYPE_AX88190 ||
nsc->sc_type == NE2000_TYPE_AX88790 ||
nsc->sc_type == NE2000_TYPE_AX88796) {
/* Select page 0 registers. */
NIC_BARRIER(nict, nich);
bus_space_write_1(nict, nich, ED_P0_CR,
ED_CR_RD2 | ED_CR_PAGE_0 | ED_CR_STA);
NIC_BARRIER(nict, nich);
/* Select word transfer. */
bus_space_write_1(nict, nich, ED_P0_DCR,
useword ? ED_DCR_WTS : 0);
NIC_BARRIER(nict, nich);
ne2000_readmem(nict, nich, asict, asich,
AX88190_NODEID_OFFSET, dsc->sc_enaddr,
ETHER_ADDR_LEN, useword);
} else {
bool ne1000 = (nsc->sc_type == NE2000_TYPE_NE1000);
ne2000_readmem(nict, nich, asict, asich, 0, romdata,
sizeof(romdata), useword);
for (i = 0; i < ETHER_ADDR_LEN; i++)
dsc->sc_enaddr[i] =
romdata[i * (ne1000 ? 1 : 2)];
}
} else
memcpy(dsc->sc_enaddr, myea, sizeof(dsc->sc_enaddr));
/* Clear any pending interrupts that might have occurred above. */
NIC_BARRIER(nict, nich);
bus_space_write_1(nict, nich, ED_P0_ISR, 0xff);
NIC_BARRIER(nict, nich);
if (dsc->sc_media_init == NULL)
dsc->sc_media_init = dp8390_media_init;
if (dp8390_config(dsc)) {
aprint_error_dev(dsc->sc_dev, "setup failed\n");
return 1;
}
return 0;
}
/*
* Detect an NE-2000 or compatible. Returns a model code.
*/
int
ne2000_detect(bus_space_tag_t nict, bus_space_handle_t nich,
bus_space_tag_t asict, bus_space_handle_t asich)
{
const uint8_t test_pattern[32] = "THIS is A memory TEST pattern";
uint8_t test_buffer[32], tmp;
int i, rv = NE2000_TYPE_UNKNOWN;
int useword;
/* Reset the board. */
#ifdef GWETHER
bus_space_write_1(asict, asich, NE2000_ASIC_RESET, 0);
ASIC_BARRIER(asict, asich);
delay(200);
#endif /* GWETHER */
tmp = bus_space_read_1(asict, asich, NE2000_ASIC_RESET);
ASIC_BARRIER(asict, asich);
delay(10000);
/*
* I don't know if this is necessary; probably cruft leftover from
* Clarkson packet driver code. Doesn't do a thing on the boards I've
* tested. -DG [note that a outb(0x84, 0) seems to work here, and is
* non-invasive...but some boards don't seem to reset and I don't have
* complete documentation on what the 'right' thing to do is...so we do
* the invasive thing for now. Yuck.]
*/
bus_space_write_1(asict, asich, NE2000_ASIC_RESET, tmp);
ASIC_BARRIER(asict, asich);
delay(5000);
/*
* This is needed because some NE clones apparently don't reset the
* NIC properly (or the NIC chip doesn't reset fully on power-up).
* XXX - this makes the probe invasive! Done against my better
* judgement. -DLG
*/
bus_space_write_1(nict, nich, ED_P0_CR,
ED_CR_RD2 | ED_CR_PAGE_0 | ED_CR_STP);
NIC_BARRIER(nict, nich);
delay(5000);
/*
* Generic probe routine for testing for the existence of a DS8390.
* Must be performed after the NIC has just been reset. This
* works by looking at certain register values that are guaranteed
* to be initialized a certain way after power-up or reset.
*
* Specifically:
*
* Register reset bits set bits
* -------- ---------- --------
* CR TXP, STA RD2, STP
* ISR RST
* IMR <all>
* DCR LAS
* TCR LB1, LB0
*
* We only look at CR and ISR, however, since looking at the others
* would require changing register pages, which would be intrusive
* if this isn't an 8390.
*/
tmp = bus_space_read_1(nict, nich, 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 = bus_space_read_1(nict, nich, ED_P0_ISR);
if ((tmp & ED_ISR_RST) != ED_ISR_RST)
goto out;
bus_space_write_1(nict, nich,
ED_P0_CR, ED_CR_RD2 | ED_CR_PAGE_0 | ED_CR_STA);
NIC_BARRIER(nict, nich);
for (i = 0; i < 100; i++) {
if ((bus_space_read_1(nict, nich, ED_P0_ISR) & ED_ISR_RST) ==
ED_ISR_RST) {
/* Ack the reset bit. */
bus_space_write_1(nict, nich, ED_P0_ISR, ED_ISR_RST);
NIC_BARRIER(nict, nich);
break;
}
delay(100);
}
#if 0
/* XXX */
if (i == 100)
goto out;
#endif
/*
* Test the ability to read and write to the NIC memory. This has
* the side effect of determining if this is an NE1000 or an NE2000.
*/
/*
* This prevents packets from being stored in the NIC memory when
* the readmem routine turns on the start bit in the CR.
*/
bus_space_write_1(nict, nich, ED_P0_RCR, ED_RCR_MON);
NIC_BARRIER(nict, nich);
/* Temporarily initialize DCR for byte operations. */
bus_space_write_1(nict, nich, ED_P0_DCR, ED_DCR_FT1 | ED_DCR_LS);
bus_space_write_1(nict, nich, ED_P0_PSTART, 8192 >> ED_PAGE_SHIFT);
bus_space_write_1(nict, nich, ED_P0_PSTOP, 16384 >> ED_PAGE_SHIFT);
/*
* Write a test pattern in byte mode. If this fails, then there
* probably isn't any memory at 8k - which likely means that the
* board is an NE2000.
*/
ne2000_writemem(nict, nich, asict, asich, test_pattern, 8192,
sizeof(test_pattern), 0, 1);
ne2000_readmem(nict, nich, asict, asich, 8192, test_buffer,
sizeof(test_buffer), 0);
if (memcmp(test_pattern, test_buffer, sizeof(test_pattern)) == 0) {
/* We're an NE1000. */
rv = NE2000_TYPE_NE1000;
goto out;
}
/* not an NE1000 - try NE2000 */
/* try 16 bit mode first */
useword = 1;
#ifdef NE2000_DETECT_8BIT
/*
* Check bus type in EEPROM first because some NE2000 compatible wedges
* on 16 bit DMA access if the chip is configured in 8 bit mode.
*/
if (ne2000_detect_8bit(nict, nich, asict, asich))
useword = 0;
#endif
again:
bus_space_write_1(nict, nich, ED_P0_DCR, ED_DCR_FT1 | ED_DCR_LS |
(useword ? ED_DCR_WTS : 0));
bus_space_write_1(nict, nich, ED_P0_PSTART, 16384 >> ED_PAGE_SHIFT);
bus_space_write_1(nict, nich, ED_P0_PSTOP,
(16384 + (useword ? 16384 : 8192)) >> ED_PAGE_SHIFT);
/*
* Write the test pattern in word mode. If this also fails,
* then we don't know what this board is.
*/
ne2000_writemem(nict, nich, asict, asich, test_pattern, 16384,
sizeof(test_pattern), useword, 1);
ne2000_readmem(nict, nich, asict, asich, 16384, test_buffer,
sizeof(test_buffer), useword);
if (memcmp(test_pattern, test_buffer, sizeof(test_pattern)) != 0) {
if (useword == 1) {
/* try 8 bit mode */
useword = 0;
goto again;
}
return NE2000_TYPE_UNKNOWN; /* not an NE2000 either */
}
rv = NE2000_TYPE_NE2000;
#if NRTL80X9 > 0
/* Check for a Realtek RTL8019. */
if (bus_space_read_1(nict, nich, NERTL_RTL0_8019ID0) == RTL0_8019ID0 &&
bus_space_read_1(nict, nich, NERTL_RTL0_8019ID1) == RTL0_8019ID1)
rv = NE2000_TYPE_RTL8019;
#endif
out:
/* Clear any pending interrupts that might have occurred above. */
NIC_BARRIER(nict, nich);
bus_space_write_1(nict, nich, ED_P0_ISR, 0xff);
return rv;
}
#ifdef NE2000_DETECT_8BIT
static bool
ne2000_detect_8bit(bus_space_tag_t nict, bus_space_handle_t nich,
bus_space_tag_t asict, bus_space_handle_t asich)
{
bool is8bit;
uint8_t romdata[32];
is8bit = false;
/* Set DCR for 8 bit DMA. */
bus_space_write_1(nict, nich, ED_P0_DCR, ED_DCR_FT1 | ED_DCR_LS);
/* Read PROM area. */
ne2000_readmem(nict, nich, asict, asich, 0, romdata,
sizeof(romdata), 0);
if (romdata[28] == 'B' && romdata[30] == 'B') {
/* 'B' (0x42) in 8 bit mode, 'W' (0x57) in 16 bit mode */
is8bit = true;
}
if (!is8bit) {
/* not in 8 bit mode; put back DCR setting for 16 bit DMA */
bus_space_write_1(nict, nich, ED_P0_DCR,
ED_DCR_FT1 | ED_DCR_LS | ED_DCR_WTS);
}
return is8bit;
}
#endif
/*
* Write an mbuf chain to the destination NIC memory address using programmed
* I/O.
*/
int
ne2000_write_mbuf(struct dp8390_softc *sc, struct mbuf *m, int buf)
{
struct ne2000_softc *nsc = (struct ne2000_softc *)sc;
bus_space_tag_t nict = sc->sc_regt;
bus_space_handle_t nich = sc->sc_regh;
bus_space_tag_t asict = nsc->sc_asict;
bus_space_handle_t asich = nsc->sc_asich;
int savelen, padlen;
int maxwait = 100; /* about 120us */
savelen = m->m_pkthdr.len;
if (savelen < ETHER_MIN_LEN - ETHER_CRC_LEN) {
padlen = ETHER_MIN_LEN - ETHER_CRC_LEN - savelen;
savelen = ETHER_MIN_LEN - ETHER_CRC_LEN;
} else
padlen = 0;
/* Select page 0 registers. */
NIC_BARRIER(nict, nich);
bus_space_write_1(nict, nich, ED_P0_CR,
ED_CR_RD2 | ED_CR_PAGE_0 | ED_CR_STA);
NIC_BARRIER(nict, nich);
/* Reset remote DMA complete flag. */
bus_space_write_1(nict, nich, ED_P0_ISR, ED_ISR_RDC);
NIC_BARRIER(nict, nich);
/* Set up DMA byte count. */
bus_space_write_1(nict, nich, ED_P0_RBCR0, savelen);
bus_space_write_1(nict, nich, ED_P0_RBCR1, savelen >> 8);
/* Set up destination address in NIC mem. */
bus_space_write_1(nict, nich, ED_P0_RSAR0, buf);
bus_space_write_1(nict, nich, ED_P0_RSAR1, buf >> 8);
/* Set remote DMA write. */
NIC_BARRIER(nict, nich);
bus_space_write_1(nict, nich,
ED_P0_CR, ED_CR_RD1 | ED_CR_PAGE_0 | ED_CR_STA);
NIC_BARRIER(nict, nich);
/*
* Transfer the mbuf chain to the NIC memory. NE2000 cards
* require that data be transferred as words, and only words,
* so that case requires some extra code to patch over odd-length
* mbufs.
*/
if (nsc->sc_useword == 0) {
/* byte ops are easy. */
for (; m != NULL; m = m->m_next) {
if (m->m_len) {
bus_space_write_multi_1(asict, asich,
NE2000_ASIC_DATA, mtod(m, uint8_t *),
m->m_len);
}
}
if (padlen) {
for(; padlen > 0; padlen--)
bus_space_write_1(asict, asich,
NE2000_ASIC_DATA, 0);
}
} else {
/* word ops are a bit trickier. */
uint8_t *data, savebyte[2];
int l, leftover;
#ifdef DIAGNOSTIC
uint8_t *lim;
#endif
/* Start out with no leftover data. */
leftover = 0;
savebyte[0] = savebyte[1] = 0;
for (; m != NULL; m = m->m_next) {
l = m->m_len;
if (l == 0)
continue;
data = mtod(m, uint8_t *);
#ifdef DIAGNOSTIC
lim = data + l;
#endif
while (l > 0) {
if (leftover) {
/*
* Data left over (from mbuf or
* realignment). Buffer the next
* byte, and write it and the
* leftover data out.
*/
savebyte[1] = *data++;
l--;
bus_space_write_stream_2(asict, asich,
NE2000_ASIC_DATA,
*(uint16_t *)savebyte);
leftover = 0;
} else if (BUS_SPACE_ALIGNED_POINTER(data,
uint16_t) == 0) {
/*
* Unaligned data; buffer the next
* byte.
*/
savebyte[0] = *data++;
l--;
leftover = 1;
} else {
/*
* Aligned data; output contiguous
* words as much as we can, then
* buffer the remaining byte, if any.
*/
leftover = l & 1;
l &= ~1;
bus_space_write_multi_stream_2(asict,
asich, NE2000_ASIC_DATA,
(uint16_t *)data, l >> 1);
data += l;
if (leftover)
savebyte[0] = *data++;
l = 0;
}
}
if (l < 0)
panic("ne2000_write_mbuf: negative len");
#ifdef DIAGNOSTIC
if (data != lim)
panic("ne2000_write_mbuf: data != lim");
#endif
}
if (leftover) {
savebyte[1] = 0;
bus_space_write_stream_2(asict, asich, NE2000_ASIC_DATA,
*(uint16_t *)savebyte);
}
if (padlen) {
for(; padlen > 1; padlen -= 2)
bus_space_write_stream_2(asict, asich,
NE2000_ASIC_DATA, 0);
}
}
NIC_BARRIER(nict, nich);
/* some AX88796 doesn't seem to have remote DMA complete */
if (sc->sc_flags & DP8390_NO_REMOTE_DMA_COMPLETE)
return savelen;
/*
* 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 (((bus_space_read_1(nict, nich, ED_P0_ISR) & ED_ISR_RDC) !=
ED_ISR_RDC) && --maxwait) {
(void)bus_space_read_1(nict, nich, ED_P0_CRDA1);
(void)bus_space_read_1(nict, nich, ED_P0_CRDA0);
NIC_BARRIER(nict, nich);
DELAY(1);
}
if (maxwait == 0) {
log(LOG_WARNING,
"%s: remote transmit DMA failed to complete\n",
device_xname(sc->sc_dev));
dp8390_reset(sc);
}
return savelen;
}
/*
* Given a source and destination address, copy 'amount' of a packet from
* the ring buffer into a linear destination buffer. Takes into account
* ring-wrap.
*/
int
ne2000_ring_copy(struct dp8390_softc *sc, int src, void *dstv, u_short amount)
{
char *dst = dstv;
struct ne2000_softc *nsc = (struct ne2000_softc *)sc;
bus_space_tag_t nict = sc->sc_regt;
bus_space_handle_t nich = sc->sc_regh;
bus_space_tag_t asict = nsc->sc_asict;
bus_space_handle_t asich = nsc->sc_asich;
u_short tmp_amount;
int useword = nsc->sc_useword;
/* Does copy wrap to lower addr in ring buffer? */
if (src + amount > sc->mem_end) {
tmp_amount = sc->mem_end - src;
/* Copy amount up to end of NIC memory. */
ne2000_readmem(nict, nich, asict, asich, src,
(uint8_t *)dst, tmp_amount, useword);
amount -= tmp_amount;
src = sc->mem_ring;
dst += tmp_amount;
}
ne2000_readmem(nict, nich, asict, asich, src, (uint8_t *)dst,
amount, useword);
return src + amount;
}
void
ne2000_read_hdr(struct dp8390_softc *sc, int buf, struct dp8390_ring *hdr)
{
struct ne2000_softc *nsc = (struct ne2000_softc *)sc;
ne2000_readmem(sc->sc_regt, sc->sc_regh, nsc->sc_asict, nsc->sc_asich,
buf, (uint8_t *)hdr, sizeof(struct dp8390_ring),
nsc->sc_useword);
#if BYTE_ORDER == BIG_ENDIAN
hdr->count = bswap16(hdr->count);
#endif
}
int
ne2000_test_mem(struct dp8390_softc *sc)
{
/* Noop. */
return 0;
}
/*
* Given a NIC memory source address and a host memory destination address,
* copy 'amount' from NIC to host using programmed i/o. The 'amount' is
* rounded up to a word - ok as long as mbufs are word sized.
*/
void
ne2000_readmem(bus_space_tag_t nict, bus_space_handle_t nich,
bus_space_tag_t asict, bus_space_handle_t asich,
int src, uint8_t *dst, size_t amount, int useword)
{
/* Select page 0 registers. */
NIC_BARRIER(nict, nich);
bus_space_write_1(nict, nich, ED_P0_CR,
ED_CR_RD2 | ED_CR_PAGE_0 | ED_CR_STA);
NIC_BARRIER(nict, nich);
/* Round up to a word. */
amount = roundup2(amount, sizeof(uint16_t));
/* Set up DMA byte count. */
bus_space_write_1(nict, nich, ED_P0_RBCR0, amount);
bus_space_write_1(nict, nich, ED_P0_RBCR1, amount >> 8);
/* Set up source address in NIC mem. */
bus_space_write_1(nict, nich, ED_P0_RSAR0, src);
bus_space_write_1(nict, nich, ED_P0_RSAR1, src >> 8);
NIC_BARRIER(nict, nich);
bus_space_write_1(nict, nich, ED_P0_CR,
ED_CR_RD0 | ED_CR_PAGE_0 | ED_CR_STA);
ASIC_BARRIER(asict, asich);
if (useword)
bus_space_read_multi_stream_2(asict, asich, NE2000_ASIC_DATA,
(uint16_t *)dst, amount >> 1);
else
bus_space_read_multi_1(asict, asich, NE2000_ASIC_DATA,
dst, amount);
}
/*
* Stripped down routine for writing a linear buffer to NIC memory. Only
* used in the probe routine to test the memory. 'len' must be even.
*/
void
ne2000_writemem(bus_space_tag_t nict, bus_space_handle_t nich,
bus_space_tag_t asict, bus_space_handle_t asich,
const uint8_t *src, int dst, size_t len, int useword, int quiet)
{
int maxwait = 100; /* about 120us */
/* Select page 0 registers. */
NIC_BARRIER(nict, nich);
bus_space_write_1(nict, nich, ED_P0_CR,
ED_CR_RD2 | ED_CR_PAGE_0 | ED_CR_STA);
NIC_BARRIER(nict, nich);
/* Reset remote DMA complete flag. */
bus_space_write_1(nict, nich, ED_P0_ISR, ED_ISR_RDC);
NIC_BARRIER(nict, nich);
/* Set up DMA byte count. */
bus_space_write_1(nict, nich, ED_P0_RBCR0, len);
bus_space_write_1(nict, nich, ED_P0_RBCR1, len >> 8);
/* Set up destination address in NIC mem. */
bus_space_write_1(nict, nich, ED_P0_RSAR0, dst);
bus_space_write_1(nict, nich, ED_P0_RSAR1, dst >> 8);
/* Set remote DMA write. */
NIC_BARRIER(nict, nich);
bus_space_write_1(nict, nich, ED_P0_CR,
ED_CR_RD1 | ED_CR_PAGE_0 | ED_CR_STA);
NIC_BARRIER(nict, nich);
ASIC_BARRIER(asict, asich);
if (useword)
bus_space_write_multi_stream_2(asict, asich, NE2000_ASIC_DATA,
(const uint16_t *)src, len >> 1);
else
bus_space_write_multi_1(asict, asich, NE2000_ASIC_DATA,
src, len);
ASIC_BARRIER(asict, asich);
/*
* 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 (((bus_space_read_1(nict, nich, ED_P0_ISR) & ED_ISR_RDC) !=
ED_ISR_RDC) && --maxwait)
DELAY(1);
if (!quiet && maxwait == 0)
printf("ne2000_writemem: failed to complete\n");
}
int
ne2000_detach(struct ne2000_softc *sc, int flags)
{
return dp8390_detach(&sc->sc_dp8390, flags);
}
bool
ne2000_suspend(device_t self, const pmf_qual_t *qual)
{
struct ne2000_softc *sc = device_private(self);
struct dp8390_softc *dsc = &sc->sc_dp8390;
int s;
s = splnet();
dp8390_stop(dsc);
dp8390_disable(dsc);
splx(s);
return true;
}
bool
ne2000_resume(device_t self, const pmf_qual_t *qual)
{
struct ne2000_softc *sc = device_private(self);
struct dp8390_softc *dsc = &sc->sc_dp8390;
struct ifnet *ifp = &dsc->sc_ec.ec_if;
int s;
s = splnet();
if (ifp->if_flags & IFF_UP) {
if (dp8390_enable(dsc) == 0)
dp8390_init(dsc);
}
splx(s);
return true;
}
