272 lines
7.5 KiB
C
272 lines
7.5 KiB
C
/*
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* Realtek 8019AS Ethernet
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* (C) Copyright 2002-2003
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* Xue Ligong(lgxue@hotmail.com),Wang Kehao, ESLAB, whut.edu.cn
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*/
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/*
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* This code works in 8bit mode.
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* If you need to work in 16bit mode, PLS change it!
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*/
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#include <common.h>
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#include <command.h>
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#include "rtl8019.h"
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#include <net.h>
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/* packet page register access functions */
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static unsigned char get_reg (unsigned int regno)
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{
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return (*(unsigned char *) regno);
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}
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static void put_reg (unsigned int regno, unsigned char val)
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{
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*(volatile unsigned char *) regno = val;
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}
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static void eth_reset (void)
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{
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unsigned char ucTemp;
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/* reset NIC */
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ucTemp = get_reg (RTL8019_RESET);
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put_reg (RTL8019_RESET, ucTemp);
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put_reg (RTL8019_INTERRUPTSTATUS, 0xff);
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udelay (2000); /* wait for 2ms */
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}
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void rtl8019_get_enetaddr (uchar * addr)
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{
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unsigned char i;
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unsigned char temp;
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eth_reset ();
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put_reg (RTL8019_COMMAND, RTL8019_REMOTEDMARD);
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put_reg (RTL8019_DATACONFIGURATION, 0x48);
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put_reg (RTL8019_REMOTESTARTADDRESS0, 0x00);
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put_reg (RTL8019_REMOTESTARTADDRESS1, 0x00);
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put_reg (RTL8019_REMOTEBYTECOUNT0, 12);
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put_reg (RTL8019_REMOTEBYTECOUNT1, 0x00);
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put_reg (RTL8019_COMMAND, RTL8019_REMOTEDMARD);
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printf ("MAC: ");
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for (i = 0; i < 6; i++) {
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temp = get_reg (RTL8019_DMA_DATA);
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*addr++ = temp;
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temp = get_reg (RTL8019_DMA_DATA);
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printf ("%x:", temp);
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}
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while ((!get_reg (RTL8019_INTERRUPTSTATUS) & 0x40));
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printf ("\b \n");
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put_reg (RTL8019_REMOTEBYTECOUNT0, 0x00);
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put_reg (RTL8019_REMOTEBYTECOUNT1, 0x00);
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put_reg (RTL8019_COMMAND, RTL8019_PAGE0);
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}
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void eth_halt (void)
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{
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put_reg (RTL8019_COMMAND, 0x01);
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}
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int eth_init (bd_t * bd)
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{
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uchar enetaddr[6];
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eth_reset ();
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put_reg (RTL8019_COMMAND, RTL8019_PAGE0STOP);
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put_reg (RTL8019_DATACONFIGURATION, 0x48);
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put_reg (RTL8019_REMOTEBYTECOUNT0, 0x00);
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put_reg (RTL8019_REMOTEBYTECOUNT1, 0x00);
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put_reg (RTL8019_RECEIVECONFIGURATION, 0x00); /*00; */
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put_reg (RTL8019_TRANSMITPAGE, RTL8019_TPSTART);
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put_reg (RTL8019_TRANSMITCONFIGURATION, 0x02);
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put_reg (RTL8019_PAGESTART, RTL8019_PSTART);
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put_reg (RTL8019_BOUNDARY, RTL8019_PSTART);
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put_reg (RTL8019_PAGESTOP, RTL8019_PSTOP);
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put_reg (RTL8019_INTERRUPTSTATUS, 0xff);
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put_reg (RTL8019_INTERRUPTMASK, 0x11); /*b; */
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put_reg (RTL8019_COMMAND, RTL8019_PAGE1STOP);
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eth_getenv_enetaddr("ethaddr", enetaddr);
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put_reg (RTL8019_PHYSICALADDRESS0, enetaddr[0]);
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put_reg (RTL8019_PHYSICALADDRESS1, enetaddr[1]);
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put_reg (RTL8019_PHYSICALADDRESS2, enetaddr[2]);
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put_reg (RTL8019_PHYSICALADDRESS3, enetaddr[3]);
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put_reg (RTL8019_PHYSICALADDRESS4, enetaddr[4]);
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put_reg (RTL8019_PHYSICALADDRESS5, enetaddr[5]);
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put_reg (RTL8019_MULTIADDRESS0, 0x00);
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put_reg (RTL8019_MULTIADDRESS1, 0x00);
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put_reg (RTL8019_MULTIADDRESS2, 0x00);
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put_reg (RTL8019_MULTIADDRESS3, 0x00);
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put_reg (RTL8019_MULTIADDRESS4, 0x00);
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put_reg (RTL8019_MULTIADDRESS5, 0x00);
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put_reg (RTL8019_MULTIADDRESS6, 0x00);
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put_reg (RTL8019_MULTIADDRESS7, 0x00);
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put_reg (RTL8019_CURRENT, RTL8019_PSTART);
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put_reg (RTL8019_COMMAND, RTL8019_PAGE0);
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put_reg (RTL8019_TRANSMITCONFIGURATION, 0xe0); /*58; */
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return 0;
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}
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static unsigned char nic_to_pc (void)
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{
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unsigned char rec_head_status;
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unsigned char next_packet_pointer;
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unsigned char packet_length0;
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unsigned char packet_length1;
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unsigned short rxlen = 0;
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unsigned int i = 4;
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unsigned char current_point;
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unsigned char *addr;
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/*
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* The RTL8019's first 4B is packet status,page of next packet
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* and packet length(2B).So we receive the fist 4B.
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*/
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put_reg (RTL8019_REMOTESTARTADDRESS1, get_reg (RTL8019_BOUNDARY));
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put_reg (RTL8019_REMOTESTARTADDRESS0, 0x00);
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put_reg (RTL8019_REMOTEBYTECOUNT1, 0x00);
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put_reg (RTL8019_REMOTEBYTECOUNT0, 0x04);
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put_reg (RTL8019_COMMAND, RTL8019_REMOTEDMARD);
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rec_head_status = get_reg (RTL8019_DMA_DATA);
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next_packet_pointer = get_reg (RTL8019_DMA_DATA);
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packet_length0 = get_reg (RTL8019_DMA_DATA);
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packet_length1 = get_reg (RTL8019_DMA_DATA);
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put_reg (RTL8019_COMMAND, RTL8019_PAGE0);
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/*Packet length is in two 8bit registers */
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rxlen = packet_length1;
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rxlen = (((rxlen << 8) & 0xff00) + packet_length0);
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rxlen -= 4;
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if (rxlen > PKTSIZE_ALIGN + PKTALIGN)
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printf ("packet too big!\n");
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/*Receive the packet */
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put_reg (RTL8019_REMOTESTARTADDRESS0, 0x04);
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put_reg (RTL8019_REMOTESTARTADDRESS1, get_reg (RTL8019_BOUNDARY));
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put_reg (RTL8019_REMOTEBYTECOUNT0, (rxlen & 0xff));
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put_reg (RTL8019_REMOTEBYTECOUNT1, ((rxlen >> 8) & 0xff));
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put_reg (RTL8019_COMMAND, RTL8019_REMOTEDMARD);
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for (addr = (unsigned char *) NetRxPackets[0], i = rxlen; i > 0; i--)
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*addr++ = get_reg (RTL8019_DMA_DATA);
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/* Pass the packet up to the protocol layers. */
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NetReceive (NetRxPackets[0], rxlen);
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while (!(get_reg (RTL8019_INTERRUPTSTATUS)) & 0x40); /* wait for the op. */
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/*
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* To test whether the packets are all received,get the
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* location of current point
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*/
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put_reg (RTL8019_COMMAND, RTL8019_PAGE1);
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current_point = get_reg (RTL8019_CURRENT);
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put_reg (RTL8019_COMMAND, RTL8019_PAGE0);
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put_reg (RTL8019_BOUNDARY, next_packet_pointer);
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return current_point;
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}
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/* Get a data block via Ethernet */
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extern int eth_rx (void)
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{
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unsigned char temp, current_point;
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put_reg (RTL8019_COMMAND, RTL8019_PAGE0);
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while (1) {
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temp = get_reg (RTL8019_INTERRUPTSTATUS);
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if (temp & 0x90) {
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/*overflow */
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put_reg (RTL8019_COMMAND, RTL8019_PAGE0STOP);
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udelay (2000);
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put_reg (RTL8019_REMOTEBYTECOUNT0, 0);
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put_reg (RTL8019_REMOTEBYTECOUNT1, 0);
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put_reg (RTL8019_TRANSMITCONFIGURATION, 2);
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do {
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current_point = nic_to_pc ();
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} while (get_reg (RTL8019_BOUNDARY) != current_point);
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put_reg (RTL8019_TRANSMITCONFIGURATION, 0xe0);
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}
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if (temp & 0x1) {
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/*packet received */
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do {
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put_reg (RTL8019_INTERRUPTSTATUS, 0x01);
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current_point = nic_to_pc ();
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} while (get_reg (RTL8019_BOUNDARY) != current_point);
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}
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if (!(temp & 0x1))
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return 0;
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/* done and exit. */
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}
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}
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/* Send a data block via Ethernet. */
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extern int eth_send (volatile void *packet, int length)
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{
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volatile unsigned char *p;
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unsigned int pn;
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pn = length;
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p = (volatile unsigned char *) packet;
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while (get_reg (RTL8019_COMMAND) == RTL8019_TRANSMIT);
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put_reg (RTL8019_REMOTESTARTADDRESS0, 0);
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put_reg (RTL8019_REMOTESTARTADDRESS1, RTL8019_TPSTART);
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put_reg (RTL8019_REMOTEBYTECOUNT0, (pn & 0xff));
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put_reg (RTL8019_REMOTEBYTECOUNT1, ((pn >> 8) & 0xff));
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put_reg (RTL8019_COMMAND, RTL8019_REMOTEDMAWR);
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while (pn > 0) {
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put_reg (RTL8019_DMA_DATA, *p++);
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pn--;
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}
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pn = length;
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while (pn < 60) { /*Padding */
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put_reg (RTL8019_DMA_DATA, 0);
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pn++;
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}
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while (!(get_reg (RTL8019_INTERRUPTSTATUS)) & 0x40);
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put_reg (RTL8019_INTERRUPTSTATUS, 0x40);
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put_reg (RTL8019_TRANSMITPAGE, RTL8019_TPSTART);
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put_reg (RTL8019_TRANSMITBYTECOUNT0, (pn & 0xff));
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put_reg (RTL8019_TRANSMITBYTECOUNT1, ((pn >> 8 & 0xff)));
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put_reg (RTL8019_COMMAND, RTL8019_TRANSMIT);
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return 0;
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}
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