mirror of
https://github.com/AsahiLinux/u-boot
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9e5616dea9
This is no-longer used in U-Boot and has not been converted to driver model. Drop it. Signed-off-by: Simon Glass <sjg@chromium.org>
791 lines
20 KiB
C
791 lines
20 KiB
C
/*
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Ported to U-Boot by Christian Pellegrin <chri@ascensit.com>
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Based on sources from the Linux kernel (pcnet_cs.c, 8390.h) and
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eCOS(if_dp83902a.c, if_dp83902a.h). Both of these 2 wonderful world
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are GPL, so this is, of course, GPL.
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==========================================================================
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dev/if_dp83902a.c
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Ethernet device driver for NS DP83902a ethernet controller
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==========================================================================
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####ECOSGPLCOPYRIGHTBEGIN####
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-------------------------------------------
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This file is part of eCos, the Embedded Configurable Operating System.
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Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc.
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eCos is free software; you can redistribute it and/or modify it under
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the terms of the GNU General Public License as published by the Free
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Software Foundation; either version 2 or (at your option) any later version.
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eCos is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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for more details.
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You should have received a copy of the GNU General Public License along
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with eCos; if not, write to the Free Software Foundation, Inc.,
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59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
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As a special exception, if other files instantiate templates or use macros
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or inline functions from this file, or you compile this file and link it
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with other works to produce a work based on this file, this file does not
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by itself cause the resulting work to be covered by the GNU General Public
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License. However the source code for this file must still be made available
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in accordance with section (3) of the GNU General Public License.
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This exception does not invalidate any other reasons why a work based on
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this file might be covered by the GNU General Public License.
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Alternative licenses for eCos may be arranged by contacting Red Hat, Inc.
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at http://sources.redhat.com/ecos/ecos-license/
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-------------------------------------------
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####ECOSGPLCOPYRIGHTEND####
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####BSDCOPYRIGHTBEGIN####
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-------------------------------------------
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Portions of this software may have been derived from OpenBSD or other sources,
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and are covered by the appropriate copyright disclaimers included herein.
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-------------------------------------------
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####BSDCOPYRIGHTEND####
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==========================================================================
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#####DESCRIPTIONBEGIN####
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Author(s): gthomas
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Contributors: gthomas, jskov, rsandifo
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Date: 2001-06-13
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Purpose:
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Description:
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FIXME: Will fail if pinged with large packets (1520 bytes)
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Add promisc config
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Add SNMP
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####DESCRIPTIONEND####
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==========================================================================
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*/
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#include <common.h>
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#include <command.h>
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#include <env.h>
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#include <net.h>
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#include <malloc.h>
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#include <linux/compiler.h>
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/* forward definition of function used for the uboot interface */
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void uboot_push_packet_len(int len);
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void uboot_push_tx_done(int key, int val);
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/* NE2000 base header file */
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#include "ne2000_base.h"
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#if defined(CONFIG_DRIVER_AX88796L)
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/* AX88796L support */
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#include "ax88796.h"
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#else
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/* Basic NE2000 chip support */
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#include "ne2000.h"
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#endif
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static dp83902a_priv_data_t nic; /* just one instance of the card supported */
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/**
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* This function reads the MAC address from the serial EEPROM,
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* used if PROM read fails. Does nothing for ax88796 chips (sh boards)
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*/
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static bool
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dp83902a_init(unsigned char *enetaddr)
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{
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dp83902a_priv_data_t *dp = &nic;
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u8* base;
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#if defined(NE2000_BASIC_INIT)
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int i;
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#endif
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DEBUG_FUNCTION();
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base = dp->base;
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if (!base)
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return false; /* No device found */
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DEBUG_LINE();
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#if defined(NE2000_BASIC_INIT)
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/* AX88796L doesn't need */
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/* Prepare ESA */
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DP_OUT(base, DP_CR, DP_CR_NODMA | DP_CR_PAGE1); /* Select page 1 */
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/* Use the address from the serial EEPROM */
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for (i = 0; i < 6; i++)
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DP_IN(base, DP_P1_PAR0+i, dp->esa[i]);
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DP_OUT(base, DP_CR, DP_CR_NODMA | DP_CR_PAGE0); /* Select page 0 */
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printf("NE2000 - %s ESA: %02x:%02x:%02x:%02x:%02x:%02x\n",
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"eeprom",
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dp->esa[0],
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dp->esa[1],
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dp->esa[2],
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dp->esa[3],
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dp->esa[4],
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dp->esa[5] );
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memcpy(enetaddr, dp->esa, 6); /* Use MAC from serial EEPROM */
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#endif /* NE2000_BASIC_INIT */
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return true;
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}
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static void
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dp83902a_stop(void)
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{
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dp83902a_priv_data_t *dp = &nic;
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u8 *base = dp->base;
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DEBUG_FUNCTION();
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DP_OUT(base, DP_CR, DP_CR_PAGE0 | DP_CR_NODMA | DP_CR_STOP); /* Brutal */
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DP_OUT(base, DP_ISR, 0xFF); /* Clear any pending interrupts */
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DP_OUT(base, DP_IMR, 0x00); /* Disable all interrupts */
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dp->running = false;
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}
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/*
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* This function is called to "start up" the interface. It may be called
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* multiple times, even when the hardware is already running. It will be
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* called whenever something "hardware oriented" changes and should leave
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* the hardware ready to send/receive packets.
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*/
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static void
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dp83902a_start(u8 * enaddr)
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{
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dp83902a_priv_data_t *dp = &nic;
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u8 *base = dp->base;
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int i;
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debug("The MAC is %pM\n", enaddr);
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DEBUG_FUNCTION();
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DP_OUT(base, DP_CR, DP_CR_PAGE0 | DP_CR_NODMA | DP_CR_STOP); /* Brutal */
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DP_OUT(base, DP_DCR, DP_DCR_INIT);
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DP_OUT(base, DP_RBCH, 0); /* Remote byte count */
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DP_OUT(base, DP_RBCL, 0);
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DP_OUT(base, DP_RCR, DP_RCR_MON); /* Accept no packets */
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DP_OUT(base, DP_TCR, DP_TCR_LOCAL); /* Transmitter [virtually] off */
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DP_OUT(base, DP_TPSR, dp->tx_buf1); /* Transmitter start page */
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dp->tx1 = dp->tx2 = 0;
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dp->tx_next = dp->tx_buf1;
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dp->tx_started = false;
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dp->running = true;
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DP_OUT(base, DP_PSTART, dp->rx_buf_start); /* Receive ring start page */
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DP_OUT(base, DP_BNDRY, dp->rx_buf_end - 1); /* Receive ring boundary */
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DP_OUT(base, DP_PSTOP, dp->rx_buf_end); /* Receive ring end page */
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dp->rx_next = dp->rx_buf_start - 1;
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dp->running = true;
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DP_OUT(base, DP_ISR, 0xFF); /* Clear any pending interrupts */
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DP_OUT(base, DP_IMR, DP_IMR_All); /* Enable all interrupts */
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DP_OUT(base, DP_CR, DP_CR_NODMA | DP_CR_PAGE1 | DP_CR_STOP); /* Select page 1 */
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DP_OUT(base, DP_P1_CURP, dp->rx_buf_start); /* Current page - next free page for Rx */
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dp->running = true;
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for (i = 0; i < ETHER_ADDR_LEN; i++) {
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/* FIXME */
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/*((vu_short*)( base + ((DP_P1_PAR0 + i) * 2) +
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* 0x1400)) = enaddr[i];*/
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DP_OUT(base, DP_P1_PAR0+i, enaddr[i]);
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}
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/* Enable and start device */
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DP_OUT(base, DP_CR, DP_CR_PAGE0 | DP_CR_NODMA | DP_CR_START);
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DP_OUT(base, DP_TCR, DP_TCR_NORMAL); /* Normal transmit operations */
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DP_OUT(base, DP_RCR, DP_RCR_AB); /* Accept broadcast, no errors, no multicast */
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dp->running = true;
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}
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/*
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* This routine is called to start the transmitter. It is split out from the
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* data handling routine so it may be called either when data becomes first
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* available or when an Tx interrupt occurs
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*/
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static void
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dp83902a_start_xmit(int start_page, int len)
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{
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dp83902a_priv_data_t *dp = (dp83902a_priv_data_t *) &nic;
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u8 *base = dp->base;
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DEBUG_FUNCTION();
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#if DEBUG & 1
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printf("Tx pkt %d len %d\n", start_page, len);
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if (dp->tx_started)
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printf("TX already started?!?\n");
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#endif
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DP_OUT(base, DP_ISR, (DP_ISR_TxP | DP_ISR_TxE));
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DP_OUT(base, DP_CR, DP_CR_PAGE0 | DP_CR_NODMA | DP_CR_START);
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DP_OUT(base, DP_TBCL, len & 0xFF);
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DP_OUT(base, DP_TBCH, len >> 8);
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DP_OUT(base, DP_TPSR, start_page);
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DP_OUT(base, DP_CR, DP_CR_NODMA | DP_CR_TXPKT | DP_CR_START);
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dp->tx_started = true;
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}
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/*
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* This routine is called to send data to the hardware. It is known a-priori
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* that there is free buffer space (dp->tx_next).
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*/
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static void
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dp83902a_send(u8 *data, int total_len, u32 key)
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{
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struct dp83902a_priv_data *dp = (struct dp83902a_priv_data *) &nic;
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u8 *base = dp->base;
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int len, start_page, pkt_len, i, isr;
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#if DEBUG & 4
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int dx;
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#endif
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DEBUG_FUNCTION();
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len = pkt_len = total_len;
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if (pkt_len < IEEE_8023_MIN_FRAME)
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pkt_len = IEEE_8023_MIN_FRAME;
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start_page = dp->tx_next;
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if (dp->tx_next == dp->tx_buf1) {
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dp->tx1 = start_page;
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dp->tx1_len = pkt_len;
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dp->tx1_key = key;
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dp->tx_next = dp->tx_buf2;
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} else {
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dp->tx2 = start_page;
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dp->tx2_len = pkt_len;
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dp->tx2_key = key;
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dp->tx_next = dp->tx_buf1;
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}
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#if DEBUG & 5
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printf("TX prep page %d len %d\n", start_page, pkt_len);
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#endif
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DP_OUT(base, DP_ISR, DP_ISR_RDC); /* Clear end of DMA */
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{
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/*
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* Dummy read. The manual sez something slightly different,
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* but the code is extended a bit to do what Hitachi's monitor
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* does (i.e., also read data).
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*/
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__maybe_unused u16 tmp;
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int len = 1;
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DP_OUT(base, DP_RSAL, 0x100 - len);
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DP_OUT(base, DP_RSAH, (start_page - 1) & 0xff);
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DP_OUT(base, DP_RBCL, len);
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DP_OUT(base, DP_RBCH, 0);
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DP_OUT(base, DP_CR, DP_CR_PAGE0 | DP_CR_RDMA | DP_CR_START);
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DP_IN_DATA(dp->data, tmp);
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}
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#ifdef CYGHWR_NS_DP83902A_PLF_BROKEN_TX_DMA
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/*
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* Stall for a bit before continuing to work around random data
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* corruption problems on some platforms.
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*/
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CYGACC_CALL_IF_DELAY_US(1);
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#endif
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/* Send data to device buffer(s) */
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DP_OUT(base, DP_RSAL, 0);
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DP_OUT(base, DP_RSAH, start_page);
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DP_OUT(base, DP_RBCL, pkt_len & 0xFF);
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DP_OUT(base, DP_RBCH, pkt_len >> 8);
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DP_OUT(base, DP_CR, DP_CR_WDMA | DP_CR_START);
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/* Put data into buffer */
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#if DEBUG & 4
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printf(" sg buf %08lx len %08x\n ", (u32)data, len);
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dx = 0;
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#endif
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while (len > 0) {
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#if DEBUG & 4
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printf(" %02x", *data);
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if (0 == (++dx % 16)) printf("\n ");
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#endif
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DP_OUT_DATA(dp->data, *data++);
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len--;
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}
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#if DEBUG & 4
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printf("\n");
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#endif
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if (total_len < pkt_len) {
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#if DEBUG & 4
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printf(" + %d bytes of padding\n", pkt_len - total_len);
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#endif
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/* Padding to 802.3 length was required */
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for (i = total_len; i < pkt_len;) {
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i++;
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DP_OUT_DATA(dp->data, 0);
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}
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}
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#ifdef CYGHWR_NS_DP83902A_PLF_BROKEN_TX_DMA
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/*
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* After last data write, delay for a bit before accessing the
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* device again, or we may get random data corruption in the last
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* datum (on some platforms).
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*/
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CYGACC_CALL_IF_DELAY_US(1);
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#endif
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/* Wait for DMA to complete */
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do {
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DP_IN(base, DP_ISR, isr);
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} while ((isr & DP_ISR_RDC) == 0);
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/* Then disable DMA */
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DP_OUT(base, DP_CR, DP_CR_PAGE0 | DP_CR_NODMA | DP_CR_START);
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/* Start transmit if not already going */
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if (!dp->tx_started) {
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if (start_page == dp->tx1) {
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dp->tx_int = 1; /* Expecting interrupt from BUF1 */
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} else {
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dp->tx_int = 2; /* Expecting interrupt from BUF2 */
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}
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dp83902a_start_xmit(start_page, pkt_len);
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}
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}
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/*
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* This function is called when a packet has been received. It's job is
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* to prepare to unload the packet from the hardware. Once the length of
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* the packet is known, the upper layer of the driver can be told. When
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* the upper layer is ready to unload the packet, the internal function
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* 'dp83902a_recv' will be called to actually fetch it from the hardware.
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*/
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static void
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dp83902a_RxEvent(void)
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{
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struct dp83902a_priv_data *dp = (struct dp83902a_priv_data *) &nic;
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u8 *base = dp->base;
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__maybe_unused u8 rsr;
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u8 rcv_hdr[4];
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int i, len, pkt, cur;
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DEBUG_FUNCTION();
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DP_IN(base, DP_RSR, rsr);
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while (true) {
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/* Read incoming packet header */
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DP_OUT(base, DP_CR, DP_CR_PAGE1 | DP_CR_NODMA | DP_CR_START);
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DP_IN(base, DP_P1_CURP, cur);
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DP_OUT(base, DP_P1_CR, DP_CR_PAGE0 | DP_CR_NODMA | DP_CR_START);
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DP_IN(base, DP_BNDRY, pkt);
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pkt += 1;
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if (pkt == dp->rx_buf_end)
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pkt = dp->rx_buf_start;
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if (pkt == cur) {
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break;
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}
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DP_OUT(base, DP_RBCL, sizeof(rcv_hdr));
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DP_OUT(base, DP_RBCH, 0);
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DP_OUT(base, DP_RSAL, 0);
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DP_OUT(base, DP_RSAH, pkt);
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if (dp->rx_next == pkt) {
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if (cur == dp->rx_buf_start)
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DP_OUT(base, DP_BNDRY, dp->rx_buf_end - 1);
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else
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DP_OUT(base, DP_BNDRY, cur - 1); /* Update pointer */
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return;
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}
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dp->rx_next = pkt;
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DP_OUT(base, DP_ISR, DP_ISR_RDC); /* Clear end of DMA */
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DP_OUT(base, DP_CR, DP_CR_RDMA | DP_CR_START);
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#ifdef CYGHWR_NS_DP83902A_PLF_BROKEN_RX_DMA
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CYGACC_CALL_IF_DELAY_US(10);
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#endif
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/* read header (get data size)*/
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for (i = 0; i < sizeof(rcv_hdr);) {
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DP_IN_DATA(dp->data, rcv_hdr[i++]);
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}
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#if DEBUG & 5
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printf("rx hdr %02x %02x %02x %02x\n",
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rcv_hdr[0], rcv_hdr[1], rcv_hdr[2], rcv_hdr[3]);
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#endif
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len = ((rcv_hdr[3] << 8) | rcv_hdr[2]) - sizeof(rcv_hdr);
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/* data read */
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uboot_push_packet_len(len);
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if (rcv_hdr[1] == dp->rx_buf_start)
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DP_OUT(base, DP_BNDRY, dp->rx_buf_end - 1);
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else
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DP_OUT(base, DP_BNDRY, rcv_hdr[1] - 1); /* Update pointer */
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}
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}
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/*
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* This function is called as a result of the "eth_drv_recv()" call above.
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* It's job is to actually fetch data for a packet from the hardware once
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* memory buffers have been allocated for the packet. Note that the buffers
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* may come in pieces, using a scatter-gather list. This allows for more
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* efficient processing in the upper layers of the stack.
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*/
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static void
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dp83902a_recv(u8 *data, int len)
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{
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struct dp83902a_priv_data *dp = (struct dp83902a_priv_data *) &nic;
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u8 *base = dp->base;
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int i, mlen;
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u8 saved_char = 0;
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bool saved;
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#if DEBUG & 4
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int dx;
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#endif
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DEBUG_FUNCTION();
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#if DEBUG & 5
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printf("Rx packet %d length %d\n", dp->rx_next, len);
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#endif
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/* Read incoming packet data */
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DP_OUT(base, DP_CR, DP_CR_PAGE0 | DP_CR_NODMA | DP_CR_START);
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DP_OUT(base, DP_RBCL, len & 0xFF);
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DP_OUT(base, DP_RBCH, len >> 8);
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DP_OUT(base, DP_RSAL, 4); /* Past header */
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DP_OUT(base, DP_RSAH, dp->rx_next);
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DP_OUT(base, DP_ISR, DP_ISR_RDC); /* Clear end of DMA */
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DP_OUT(base, DP_CR, DP_CR_RDMA | DP_CR_START);
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#ifdef CYGHWR_NS_DP83902A_PLF_BROKEN_RX_DMA
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CYGACC_CALL_IF_DELAY_US(10);
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#endif
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|
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saved = false;
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|
for (i = 0; i < 1; i++) {
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if (data) {
|
|
mlen = len;
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#if DEBUG & 4
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printf(" sg buf %08lx len %08x \n", (u32) data, mlen);
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dx = 0;
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#endif
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while (0 < mlen) {
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/* Saved byte from previous loop? */
|
|
if (saved) {
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*data++ = saved_char;
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mlen--;
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saved = false;
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continue;
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|
}
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|
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{
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u8 tmp;
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DP_IN_DATA(dp->data, tmp);
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#if DEBUG & 4
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printf(" %02x", tmp);
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if (0 == (++dx % 16)) printf("\n ");
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#endif
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*data++ = tmp;
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mlen--;
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}
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}
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#if DEBUG & 4
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printf("\n");
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#endif
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}
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}
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}
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static void
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dp83902a_TxEvent(void)
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{
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struct dp83902a_priv_data *dp = (struct dp83902a_priv_data *) &nic;
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u8 *base = dp->base;
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__maybe_unused u8 tsr;
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u32 key;
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DEBUG_FUNCTION();
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DP_IN(base, DP_TSR, tsr);
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if (dp->tx_int == 1) {
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key = dp->tx1_key;
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dp->tx1 = 0;
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} else {
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key = dp->tx2_key;
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dp->tx2 = 0;
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}
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/* Start next packet if one is ready */
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dp->tx_started = false;
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if (dp->tx1) {
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dp83902a_start_xmit(dp->tx1, dp->tx1_len);
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dp->tx_int = 1;
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} else if (dp->tx2) {
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dp83902a_start_xmit(dp->tx2, dp->tx2_len);
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dp->tx_int = 2;
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} else {
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dp->tx_int = 0;
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}
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/* Tell higher level we sent this packet */
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uboot_push_tx_done(key, 0);
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}
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/*
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* Read the tally counters to clear them. Called in response to a CNT
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* interrupt.
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*/
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static void
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dp83902a_ClearCounters(void)
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{
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struct dp83902a_priv_data *dp = (struct dp83902a_priv_data *) &nic;
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u8 *base = dp->base;
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__maybe_unused u8 cnt1, cnt2, cnt3;
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DP_IN(base, DP_FER, cnt1);
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DP_IN(base, DP_CER, cnt2);
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DP_IN(base, DP_MISSED, cnt3);
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DP_OUT(base, DP_ISR, DP_ISR_CNT);
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}
|
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|
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/*
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* Deal with an overflow condition. This code follows the procedure set
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* out in section 7.0 of the datasheet.
|
|
*/
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static void
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dp83902a_Overflow(void)
|
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{
|
|
struct dp83902a_priv_data *dp = (struct dp83902a_priv_data *)&nic;
|
|
u8 *base = dp->base;
|
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u8 isr;
|
|
|
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/* Issue a stop command and wait 1.6ms for it to complete. */
|
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DP_OUT(base, DP_CR, DP_CR_STOP | DP_CR_NODMA);
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CYGACC_CALL_IF_DELAY_US(1600);
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|
|
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/* Clear the remote byte counter registers. */
|
|
DP_OUT(base, DP_RBCL, 0);
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|
DP_OUT(base, DP_RBCH, 0);
|
|
|
|
/* Enter loopback mode while we clear the buffer. */
|
|
DP_OUT(base, DP_TCR, DP_TCR_LOCAL);
|
|
DP_OUT(base, DP_CR, DP_CR_START | DP_CR_NODMA);
|
|
|
|
/*
|
|
* Read in as many packets as we can and acknowledge any and receive
|
|
* interrupts. Since the buffer has overflowed, a receive event of
|
|
* some kind will have occurred.
|
|
*/
|
|
dp83902a_RxEvent();
|
|
DP_OUT(base, DP_ISR, DP_ISR_RxP|DP_ISR_RxE);
|
|
|
|
/* Clear the overflow condition and leave loopback mode. */
|
|
DP_OUT(base, DP_ISR, DP_ISR_OFLW);
|
|
DP_OUT(base, DP_TCR, DP_TCR_NORMAL);
|
|
|
|
/*
|
|
* If a transmit command was issued, but no transmit event has occurred,
|
|
* restart it here.
|
|
*/
|
|
DP_IN(base, DP_ISR, isr);
|
|
if (dp->tx_started && !(isr & (DP_ISR_TxP|DP_ISR_TxE))) {
|
|
DP_OUT(base, DP_CR, DP_CR_NODMA | DP_CR_TXPKT | DP_CR_START);
|
|
}
|
|
}
|
|
|
|
static void
|
|
dp83902a_poll(void)
|
|
{
|
|
struct dp83902a_priv_data *dp = (struct dp83902a_priv_data *) &nic;
|
|
u8 *base = dp->base;
|
|
u8 isr;
|
|
|
|
DP_OUT(base, DP_CR, DP_CR_NODMA | DP_CR_PAGE0 | DP_CR_START);
|
|
DP_IN(base, DP_ISR, isr);
|
|
while (0 != isr) {
|
|
/*
|
|
* The CNT interrupt triggers when the MSB of one of the error
|
|
* counters is set. We don't much care about these counters, but
|
|
* we should read their values to reset them.
|
|
*/
|
|
if (isr & DP_ISR_CNT) {
|
|
dp83902a_ClearCounters();
|
|
}
|
|
/*
|
|
* Check for overflow. It's a special case, since there's a
|
|
* particular procedure that must be followed to get back into
|
|
* a running state.a
|
|
*/
|
|
if (isr & DP_ISR_OFLW) {
|
|
dp83902a_Overflow();
|
|
} else {
|
|
/*
|
|
* Other kinds of interrupts can be acknowledged simply by
|
|
* clearing the relevant bits of the ISR. Do that now, then
|
|
* handle the interrupts we care about.
|
|
*/
|
|
DP_OUT(base, DP_ISR, isr); /* Clear set bits */
|
|
if (!dp->running) break; /* Is this necessary? */
|
|
/*
|
|
* Check for tx_started on TX event since these may happen
|
|
* spuriously it seems.
|
|
*/
|
|
if (isr & (DP_ISR_TxP|DP_ISR_TxE) && dp->tx_started) {
|
|
dp83902a_TxEvent();
|
|
}
|
|
if (isr & (DP_ISR_RxP|DP_ISR_RxE)) {
|
|
dp83902a_RxEvent();
|
|
}
|
|
}
|
|
DP_IN(base, DP_ISR, isr);
|
|
}
|
|
}
|
|
|
|
|
|
/* U-Boot specific routines */
|
|
static u8 *pbuf = NULL;
|
|
|
|
static int pkey = -1;
|
|
static int initialized = 0;
|
|
|
|
void uboot_push_packet_len(int len) {
|
|
PRINTK("pushed len = %d\n", len);
|
|
if (len >= 2000) {
|
|
printf("NE2000: packet too big\n");
|
|
return;
|
|
}
|
|
dp83902a_recv(&pbuf[0], len);
|
|
|
|
/*Just pass it to the upper layer*/
|
|
net_process_received_packet(&pbuf[0], len);
|
|
}
|
|
|
|
void uboot_push_tx_done(int key, int val) {
|
|
PRINTK("pushed key = %d\n", key);
|
|
pkey = key;
|
|
}
|
|
|
|
/**
|
|
* Setup the driver and init MAC address according to doc/README.enetaddr
|
|
* Called by ne2k_register() before registering the driver @eth layer
|
|
*
|
|
* @param struct ethdevice of this instance of the driver for dev->enetaddr
|
|
* @return 0 on success, -1 on error (causing caller to print error msg)
|
|
*/
|
|
static int ne2k_setup_driver(struct eth_device *dev)
|
|
{
|
|
PRINTK("### ne2k_setup_driver\n");
|
|
|
|
if (!pbuf) {
|
|
pbuf = malloc(2000);
|
|
if (!pbuf) {
|
|
printf("Cannot allocate rx buffer\n");
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
nic.base = (u8 *) CONFIG_DRIVER_NE2000_BASE;
|
|
|
|
nic.data = nic.base + DP_DATA;
|
|
nic.tx_buf1 = START_PG;
|
|
nic.tx_buf2 = START_PG2;
|
|
nic.rx_buf_start = RX_START;
|
|
nic.rx_buf_end = RX_END;
|
|
|
|
/*
|
|
* According to doc/README.enetaddr, drivers shall give priority
|
|
* to the MAC address value in the environment, so we do not read
|
|
* it from the prom or eeprom if it is specified in the environment.
|
|
*/
|
|
if (!eth_env_get_enetaddr("ethaddr", dev->enetaddr)) {
|
|
/* If the MAC address is not in the environment, get it: */
|
|
if (!get_prom(dev->enetaddr, nic.base)) /* get MAC from prom */
|
|
dp83902a_init(dev->enetaddr); /* fallback: seeprom */
|
|
/* And write it into the environment otherwise eth_write_hwaddr
|
|
* returns -1 due to eth_env_get_enetaddr_by_index() failing,
|
|
* and this causes "Warning: failed to set MAC address", and
|
|
* cmd_bdinfo has no ethaddr value which it can show: */
|
|
eth_env_set_enetaddr("ethaddr", dev->enetaddr);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int ne2k_init(struct eth_device *dev, bd_t *bd)
|
|
{
|
|
dp83902a_start(dev->enetaddr);
|
|
initialized = 1;
|
|
return 0;
|
|
}
|
|
|
|
static void ne2k_halt(struct eth_device *dev)
|
|
{
|
|
debug("### ne2k_halt\n");
|
|
if(initialized)
|
|
dp83902a_stop();
|
|
initialized = 0;
|
|
}
|
|
|
|
static int ne2k_recv(struct eth_device *dev)
|
|
{
|
|
dp83902a_poll();
|
|
return 1;
|
|
}
|
|
|
|
static int ne2k_send(struct eth_device *dev, void *packet, int length)
|
|
{
|
|
int tmo;
|
|
|
|
debug("### ne2k_send\n");
|
|
|
|
pkey = -1;
|
|
|
|
dp83902a_send((u8 *) packet, length, 666);
|
|
tmo = get_timer (0) + TOUT * CONFIG_SYS_HZ;
|
|
while(1) {
|
|
dp83902a_poll();
|
|
if (pkey != -1) {
|
|
PRINTK("Packet sucesfully sent\n");
|
|
return 0;
|
|
}
|
|
if (get_timer (0) >= tmo) {
|
|
printf("transmission error (timoeut)\n");
|
|
return 0;
|
|
}
|
|
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* Setup the driver for use and register it with the eth layer
|
|
* @return 0 on success, -1 on error (causing caller to print error msg)
|
|
*/
|
|
int ne2k_register(void)
|
|
{
|
|
struct eth_device *dev;
|
|
|
|
dev = calloc(sizeof(*dev), 1);
|
|
if (dev == NULL)
|
|
return -1;
|
|
|
|
if (ne2k_setup_driver(dev))
|
|
return -1;
|
|
|
|
dev->init = ne2k_init;
|
|
dev->halt = ne2k_halt;
|
|
dev->send = ne2k_send;
|
|
dev->recv = ne2k_recv;
|
|
|
|
strcpy(dev->name, "NE2000");
|
|
|
|
return eth_register(dev);
|
|
}
|