drivers/net/rtl8019.c - uboot/prism - Git at Google

 /*
  * 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>

 /* 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)
 {
 	uchar enetaddr[6];
 	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);
 	eth_getenv_enetaddr("ethaddr", enetaddr);
 	put_reg (RTL8019_PHYSICALADDRESS0, enetaddr[0]);
 	put_reg (RTL8019_PHYSICALADDRESS1, enetaddr[1]);
 	put_reg (RTL8019_PHYSICALADDRESS2, enetaddr[2]);
 	put_reg (RTL8019_PHYSICALADDRESS3, enetaddr[3]);
 	put_reg (RTL8019_PHYSICALADDRESS4, enetaddr[4]);
 	put_reg (RTL8019_PHYSICALADDRESS5, 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;
 }
	/*
	* 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>

	/* 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)
	{
	uchar enetaddr[6];
	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);
	eth_getenv_enetaddr("ethaddr", enetaddr);
	put_reg (RTL8019_PHYSICALADDRESS0, enetaddr[0]);
	put_reg (RTL8019_PHYSICALADDRESS1, enetaddr[1]);
	put_reg (RTL8019_PHYSICALADDRESS2, enetaddr[2]);
	put_reg (RTL8019_PHYSICALADDRESS3, enetaddr[3]);
	put_reg (RTL8019_PHYSICALADDRESS4, enetaddr[4]);
	put_reg (RTL8019_PHYSICALADDRESS5, 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;
	}