* 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

1 files changed, 282 insertions, 0 deletions

diff --git a/drivers/rtl8019.c b/drivers/rtl8019.c
new file mode 100644
index 0000000..62b9245
--- /dev/null
+++ b/drivers/rtl8019.c
@@ -0,0 +1,282 @@
+/*
+ * 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 */