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u-boot/drivers/rtl8019.c
wdenk ef5a9672c7 * Patch by Xue Ligong (Joe), 13 Nov 2003: 
add Realtek 8019 ethernet driver

* Patch by Yuli Barcohen, 13 Nov 2003:
  MPC826xADS/PQ2FADS  cleanup

* Patch by Anders Larsen, 12 Nov 2003:
  Update README to mark the PORTIO commands non-standard
2003-12-07 00:46:27 +00:00

283 lines
7.6 KiB
C
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/*
* Realtek 8019AS Ethernet
* (C) Copyright 2002-2003
* Xue Ligong(lgxue@hotmail.com),Wang Kehao, ESLAB, whut.edu.cn
*
* See file CREDITS for list of people who contributed to this
* project.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*/
/*
* This code works in 8bit mode.
* If you need to work in 16bit mode, PLS change it!
*/
#include <common.h>
#include <command.h>
#include "rtl8019.h"
#include <net.h>
#ifdef CONFIG_DRIVER_RTL8019
#if (CONFIG_COMMANDS & CFG_CMD_NET)
/* packet page register access functions */
static unsigned char get_reg (unsigned int regno)
{
return (*(unsigned char *) regno);
}
static void put_reg (unsigned int regno, unsigned char val)
{
*(volatile unsigned char *) regno = val;
}
static void eth_reset (void)
{
unsigned char ucTemp;
/* reset NIC */
ucTemp = get_reg (RTL8019_RESET);
put_reg (RTL8019_RESET, ucTemp);
put_reg (RTL8019_INTERRUPTSTATUS, 0xff);
udelay (2000); /* wait for 2ms */
}
void rtl8019_get_enetaddr (uchar * addr)
{
unsigned char i;
unsigned char temp;
eth_reset ();
put_reg (RTL8019_COMMAND, RTL8019_REMOTEDMARD);
put_reg (RTL8019_DATACONFIGURATION, 0x48);
put_reg (RTL8019_REMOTESTARTADDRESS0, 0x00);
put_reg (RTL8019_REMOTESTARTADDRESS1, 0x00);
put_reg (RTL8019_REMOTEBYTECOUNT0, 12);
put_reg (RTL8019_REMOTEBYTECOUNT1, 0x00);
put_reg (RTL8019_COMMAND, RTL8019_REMOTEDMARD);
printf ("MAC: ");
for (i = 0; i < 6; i++) {
temp = get_reg (RTL8019_DMA_DATA);
*addr++ = temp;
temp = get_reg (RTL8019_DMA_DATA);
printf ("%x:", temp);
}
while ((!get_reg (RTL8019_INTERRUPTSTATUS) & 0x40));
printf ("\b \n");
put_reg (RTL8019_REMOTEBYTECOUNT0, 0x00);
put_reg (RTL8019_REMOTEBYTECOUNT1, 0x00);
put_reg (RTL8019_COMMAND, RTL8019_PAGE0);
}
void eth_halt (void)
{
put_reg (RTL8019_COMMAND, 0x01);
}
int eth_init (bd_t * bd)
{
eth_reset ();
put_reg (RTL8019_COMMAND, RTL8019_PAGE0STOP);
put_reg (RTL8019_DATACONFIGURATION, 0x48);
put_reg (RTL8019_REMOTEBYTECOUNT0, 0x00);
put_reg (RTL8019_REMOTEBYTECOUNT1, 0x00);
put_reg (RTL8019_RECEIVECONFIGURATION, 0x00); /*00; */
put_reg (RTL8019_TRANSMITPAGE, RTL8019_TPSTART);
put_reg (RTL8019_TRANSMITCONFIGURATION, 0x02);
put_reg (RTL8019_PAGESTART, RTL8019_PSTART);
put_reg (RTL8019_BOUNDARY, RTL8019_PSTART);
put_reg (RTL8019_PAGESTOP, RTL8019_PSTOP);
put_reg (RTL8019_INTERRUPTSTATUS, 0xff);
put_reg (RTL8019_INTERRUPTMASK, 0x11); /*b; */
put_reg (RTL8019_COMMAND, RTL8019_PAGE1STOP);
put_reg (RTL8019_PHYSICALADDRESS0, bd->bi_enetaddr[0]);
put_reg (RTL8019_PHYSICALADDRESS1, bd->bi_enetaddr[1]);
put_reg (RTL8019_PHYSICALADDRESS2, bd->bi_enetaddr[2]);
put_reg (RTL8019_PHYSICALADDRESS3, bd->bi_enetaddr[3]);
put_reg (RTL8019_PHYSICALADDRESS4, bd->bi_enetaddr[4]);
put_reg (RTL8019_PHYSICALADDRESS5, bd->bi_enetaddr[5]);
put_reg (RTL8019_MULTIADDRESS0, 0x00);
put_reg (RTL8019_MULTIADDRESS1, 0x00);
put_reg (RTL8019_MULTIADDRESS2, 0x00);
put_reg (RTL8019_MULTIADDRESS3, 0x00);
put_reg (RTL8019_MULTIADDRESS4, 0x00);
put_reg (RTL8019_MULTIADDRESS5, 0x00);
put_reg (RTL8019_MULTIADDRESS6, 0x00);
put_reg (RTL8019_MULTIADDRESS7, 0x00);
put_reg (RTL8019_CURRENT, RTL8019_PSTART);
put_reg (RTL8019_COMMAND, RTL8019_PAGE0);
put_reg (RTL8019_TRANSMITCONFIGURATION, 0xe0); /*58; */
return 0;
}
static unsigned char nic_to_pc (void)
{
unsigned char rec_head_status;
unsigned char next_packet_pointer;
unsigned char packet_length0;
unsigned char packet_length1;
unsigned short rxlen = 0;
unsigned int i = 4;
unsigned char current_point;
unsigned char *addr;
/*
* The RTL8019's first 4B is packet status,page of next packet
* and packet length(2B).So we receive the fist 4B.
*/
put_reg (RTL8019_REMOTESTARTADDRESS1, get_reg (RTL8019_BOUNDARY));
put_reg (RTL8019_REMOTESTARTADDRESS0, 0x00);
put_reg (RTL8019_REMOTEBYTECOUNT1, 0x00);
put_reg (RTL8019_REMOTEBYTECOUNT0, 0x04);
put_reg (RTL8019_COMMAND, RTL8019_REMOTEDMARD);
rec_head_status = get_reg (RTL8019_DMA_DATA);
next_packet_pointer = get_reg (RTL8019_DMA_DATA);
packet_length0 = get_reg (RTL8019_DMA_DATA);
packet_length1 = get_reg (RTL8019_DMA_DATA);
put_reg (RTL8019_COMMAND, RTL8019_PAGE0);
/*Packet length is in two 8bit registers */
rxlen = packet_length1;
rxlen = (((rxlen << 8) & 0xff00) + packet_length0);
rxlen -= 4;
if (rxlen > PKTSIZE_ALIGN + PKTALIGN)
printf ("packet too big!\n");
/*Receive the packet */
put_reg (RTL8019_REMOTESTARTADDRESS0, 0x04);
put_reg (RTL8019_REMOTESTARTADDRESS1, get_reg (RTL8019_BOUNDARY));
put_reg (RTL8019_REMOTEBYTECOUNT0, (rxlen & 0xff));
put_reg (RTL8019_REMOTEBYTECOUNT1, ((rxlen >> 8) & 0xff));
put_reg (RTL8019_COMMAND, RTL8019_REMOTEDMARD);
for (addr = (unsigned char *) NetRxPackets[0], i = rxlen; i > 0; i--)
*addr++ = get_reg (RTL8019_DMA_DATA);
/* Pass the packet up to the protocol layers. */
NetReceive (NetRxPackets[0], rxlen);
while (!(get_reg (RTL8019_INTERRUPTSTATUS)) & 0x40); /* wait for the op. */
/*
* To test whether the packets are all received,get the
* location of current point
*/
put_reg (RTL8019_COMMAND, RTL8019_PAGE1);
current_point = get_reg (RTL8019_CURRENT);
put_reg (RTL8019_COMMAND, RTL8019_PAGE0);
put_reg (RTL8019_BOUNDARY, next_packet_pointer);
return current_point;
}
/* Get a data block via Ethernet */
extern int eth_rx (void)
{
unsigned char temp, current_point;
put_reg (RTL8019_COMMAND, RTL8019_PAGE0);
while (1) {
temp = get_reg (RTL8019_INTERRUPTSTATUS);
if (temp & 0x90) {
/*overflow */
put_reg (RTL8019_COMMAND, RTL8019_PAGE0STOP);
udelay (2000);
put_reg (RTL8019_REMOTEBYTECOUNT0, 0);
put_reg (RTL8019_REMOTEBYTECOUNT1, 0);
put_reg (RTL8019_TRANSMITCONFIGURATION, 2);
do {
current_point = nic_to_pc ();
} while (get_reg (RTL8019_BOUNDARY) != current_point);
put_reg (RTL8019_TRANSMITCONFIGURATION, 0xe0);
}
if (temp & 0x1) {
/*packet received */
do {
put_reg (RTL8019_INTERRUPTSTATUS, 0x01);
current_point = nic_to_pc ();
} while (get_reg (RTL8019_BOUNDARY) != current_point);
}
if (!(temp & 0x1))
return 0;
/* done and exit. */
}
}
/* Send a data block via Ethernet. */
extern int eth_send (volatile void *packet, int length)
{
volatile unsigned char *p;
unsigned int pn;
pn = length;
p = (volatile unsigned char *) packet;
while (get_reg (RTL8019_COMMAND) == RTL8019_TRANSMIT);
put_reg (RTL8019_REMOTESTARTADDRESS0, 0);
put_reg (RTL8019_REMOTESTARTADDRESS1, RTL8019_TPSTART);
put_reg (RTL8019_REMOTEBYTECOUNT0, (pn & 0xff));
put_reg (RTL8019_REMOTEBYTECOUNT1, ((pn >> 8) & 0xff));
put_reg (RTL8019_COMMAND, RTL8019_REMOTEDMAWR);
while (pn > 0) {
put_reg (RTL8019_DMA_DATA, *p++);
pn--;
}
pn = length;
while (pn < 60) { /*Padding */
put_reg (RTL8019_DMA_DATA, 0);
pn++;
}
while (!(get_reg (RTL8019_INTERRUPTSTATUS)) & 0x40);
put_reg (RTL8019_INTERRUPTSTATUS, 0x40);
put_reg (RTL8019_TRANSMITPAGE, RTL8019_TPSTART);
put_reg (RTL8019_TRANSMITBYTECOUNT0, (pn & 0xff));
put_reg (RTL8019_TRANSMITBYTECOUNT1, ((pn >> 8 & 0xff)));
put_reg (RTL8019_COMMAND, RTL8019_TRANSMIT);
return 0;
}
#endif /* COMMANDS & CFG_NET */
#endif /* CONFIG_DRIVER_RTL8019 */
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