* Patch by Ronen Shitrit, 10 Dec 2003:

  Add support for the Marvell DB64360 / DB64460 development boards

* Patch by Detlev Zundel, 10 Dec 2003:
  fix dependency problem in examples/Makefile

1 files changed, 3182 insertions, 0 deletions

diff --git a/board/Marvell/db64460/mv_eth.c b/board/Marvell/db64460/mv_eth.c
new file mode 100644
index 0000000..b78fda3
--- /dev/null
+++ b/board/Marvell/db64460/mv_eth.c
@@ -0,0 +1,3182 @@
+/*
+ * (C) Copyright 2003
+ * Ingo Assmus <ingo.assmus@keymile.com>
+ *
+ * based on - Driver for MV64460X ethernet ports
+ * Copyright (C) 2002 rabeeh@galileo.co.il
+ *
+ * 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
+ */
+
+/*
+ * mv_eth.c - header file for the polled mode GT ethernet driver
+ */
+#include <common.h>
+#include <net.h>
+#include <malloc.h>
+
+#include "mv_eth.h"
+
+/* enable Debug outputs */
+
+#undef DEBUG_MV_ETH
+
+#ifdef DEBUG_MV_ETH
+#define DEBUG
+#define DP(x) x
+#else
+#define DP(x)
+#endif
+
+#undef MV64460_CHECKSUM_OFFLOAD
+/*************************************************************************
+**************************************************************************
+**************************************************************************
+*  The first part is the high level driver of the gigE ethernet ports.   *
+**************************************************************************
+**************************************************************************
+*************************************************************************/
+
+/* Definition for configuring driver */
+/* #define UPDATE_STATS_BY_SOFTWARE */
+#undef MV64460_RX_QUEUE_FILL_ON_TASK
+
+
+/* Constants */
+#define MAGIC_ETH_RUNNING		8031971
+#define MV64460_INTERNAL_SRAM_SIZE                      _256K
+#define EXTRA_BYTES 32
+#define WRAP       ETH_HLEN + 2 + 4 + 16
+#define BUFFER_MTU dev->mtu + WRAP
+#define INT_CAUSE_UNMASK_ALL		0x0007ffff
+#define INT_CAUSE_UNMASK_ALL_EXT	0x0011ffff
+#ifdef MV64460_RX_FILL_ON_TASK
+#define INT_CAUSE_MASK_ALL		0x00000000
+#define INT_CAUSE_CHECK_BITS		INT_CAUSE_UNMASK_ALL
+#define INT_CAUSE_CHECK_BITS_EXT	INT_CAUSE_UNMASK_ALL_EXT
+#endif
+
+/* Read/Write to/from MV64460 internal registers */
+#define MV_REG_READ(offset) my_le32_to_cpu(* (volatile unsigned int *) (INTERNAL_REG_BASE_ADDR + offset))
+#define MV_REG_WRITE(offset,data) *(volatile unsigned int *) (INTERNAL_REG_BASE_ADDR + offset) = my_cpu_to_le32 (data)
+#define MV_SET_REG_BITS(regOffset,bits) ((*((volatile unsigned int*)((INTERNAL_REG_BASE_ADDR) + (regOffset)))) |= ((unsigned int)my_cpu_to_le32(bits)))
+#define MV_RESET_REG_BITS(regOffset,bits) ((*((volatile unsigned int*)((INTERNAL_REG_BASE_ADDR) + (regOffset)))) &= ~((unsigned int)my_cpu_to_le32(bits)))
+
+/* Static function declarations */
+static int mv64460_eth_real_open (struct eth_device *eth);
+static int mv64460_eth_real_stop (struct eth_device *eth);
+static struct net_device_stats *mv64460_eth_get_stats (struct eth_device
+						       *dev);
+static void eth_port_init_mac_tables (ETH_PORT eth_port_num);
+static void mv64460_eth_update_stat (struct eth_device *dev);
+bool db64460_eth_start (struct eth_device *eth);
+unsigned int eth_read_mib_counter (ETH_PORT eth_port_num,
+				   unsigned int mib_offset);
+int mv64460_eth_receive (struct eth_device *dev);
+
+int mv64460_eth_xmit (struct eth_device *, volatile void *packet, int length);
+
+#ifndef  UPDATE_STATS_BY_SOFTWARE
+static void mv64460_eth_print_stat (struct eth_device *dev);
+#endif
+/* Processes a received packet */
+extern void NetReceive (volatile uchar *, int);
+
+extern unsigned int INTERNAL_REG_BASE_ADDR;
+
+/*************************************************
+ *Helper functions - used inside the driver only *
+ *************************************************/
+#ifdef DEBUG_MV_ETH
+void print_globals (struct eth_device *dev)
+{
+	printf ("Ethernet PRINT_Globals-Debug function\n");
+	printf ("Base Address for ETH_PORT_INFO:	%08x\n",
+		(unsigned int) dev->priv);
+	printf ("Base Address for mv64460_eth_priv:	%08x\n",
+		(unsigned int) &(((ETH_PORT_INFO *) dev->priv)->
+				 port_private));
+
+	printf ("GT Internal Base Address:	%08x\n",
+		INTERNAL_REG_BASE_ADDR);
+	printf ("Base Address for TX-DESCs:	%08x	Number of allocated Buffers %d\n", (unsigned int) ((ETH_PORT_INFO *) dev->priv)->p_tx_desc_area_base[0], MV64460_TX_QUEUE_SIZE);
+	printf ("Base Address for RX-DESCs:	%08x	Number of allocated Buffers %d\n", (unsigned int) ((ETH_PORT_INFO *) dev->priv)->p_rx_desc_area_base[0], MV64460_RX_QUEUE_SIZE);
+	printf ("Base Address for RX-Buffer:	%08x	allocated Bytes %d\n",
+		(unsigned int) ((ETH_PORT_INFO *) dev->priv)->
+		p_rx_buffer_base[0],
+		(MV64460_RX_QUEUE_SIZE * MV64460_RX_BUFFER_SIZE) + 32);
+	printf ("Base Address for TX-Buffer:	%08x	allocated Bytes %d\n",
+		(unsigned int) ((ETH_PORT_INFO *) dev->priv)->
+		p_tx_buffer_base[0],
+		(MV64460_TX_QUEUE_SIZE * MV64460_TX_BUFFER_SIZE) + 32);
+}
+#endif
+
+#define my_cpu_to_le32(x) my_le32_to_cpu((x))
+
+unsigned long my_le32_to_cpu (unsigned long x)
+{
+	return (((x & 0x000000ffU) << 24) |
+		((x & 0x0000ff00U) << 8) |
+		((x & 0x00ff0000U) >> 8) | ((x & 0xff000000U) >> 24));
+}
+
+
+/**********************************************************************
+ * mv64460_eth_print_phy_status
+ *
+ * Prints gigabit ethenret phy status
+ *
+ * Input : pointer to ethernet interface network device structure
+ * Output : N/A
+ **********************************************************************/
+
+static void mv64460_eth_print_phy_status (struct eth_device *dev)
+{
+	struct mv64460_eth_priv *port_private;
+	unsigned int port_num;
+	ETH_PORT_INFO *ethernet_private = (ETH_PORT_INFO *) dev->priv;
+	unsigned int port_status, phy_reg_data;
+
+	port_private =
+		(struct mv64460_eth_priv *) ethernet_private->port_private;
+	port_num = port_private->port_num;
+
+	/* Check Link status on phy */
+	eth_port_read_smi_reg (port_num, 1, &phy_reg_data);
+	if (!(phy_reg_data & 0x20)) {
+		printf ("Ethernet port changed link status to DOWN\n");
+	} else {
+		port_status =
+			MV_REG_READ (MV64460_ETH_PORT_STATUS_REG (port_num));
+		printf ("Ethernet status port %d: Link up", port_num);
+		printf (", %s",
+			(port_status & BIT2) ? "Full Duplex" : "Half Duplex");
+		if (port_status & BIT4)
+			printf (", Speed 1 Gbps");
+		else
+			printf (", %s",
+				(port_status & BIT5) ? "Speed 100 Mbps" :
+				"Speed 10 Mbps");
+		printf ("\n");
+	}
+}
+
+/**********************************************************************
+ * u-boot entry functions for mv64460_eth
+ *
+ **********************************************************************/
+int db64460_eth_probe (struct eth_device *dev)
+{
+	return ((int) db64460_eth_start (dev));
+}
+
+int db64460_eth_poll (struct eth_device *dev)
+{
+	return mv64460_eth_receive (dev);
+}
+
+int db64460_eth_transmit (struct eth_device *dev, volatile void *packet,
+			  int length)
+{
+	mv64460_eth_xmit (dev, packet, length);
+	return 0;
+}
+
+void db64460_eth_disable (struct eth_device *dev)
+{
+	mv64460_eth_stop (dev);
+}
+
+
+void mv6446x_eth_initialize (bd_t * bis)
+{
+	struct eth_device *dev;
+	ETH_PORT_INFO *ethernet_private;
+	struct mv64460_eth_priv *port_private;
+	int devnum, x, temp;
+	char *s, *e, buf[64];
+
+	for (devnum = 0; devnum < MV_ETH_DEVS; devnum++) {
+		dev = calloc (sizeof (*dev), 1);
+		if (!dev) {
+			printf ("%s: mv_enet%d allocation failure, %s\n",
+				__FUNCTION__, devnum, "eth_device structure");
+			return;
+		}
+
+		/* must be less than NAMESIZE (16) */
+		sprintf (dev->name, "mv_enet%d", devnum);
+
+#ifdef DEBUG
+		printf ("Initializing %s\n", dev->name);
+#endif
+
+		/* Extract the MAC address from the environment */
+		switch (devnum) {
+		case 0:
+			s = "ethaddr";
+			break;
+
+		case 1:
+			s = "eth1addr";
+			break;
+
+		case 2:
+			s = "eth2addr";
+			break;
+
+		default:	/* this should never happen */
+			printf ("%s: Invalid device number %d\n",
+				__FUNCTION__, devnum);
+			return;
+		}
+
+		temp = getenv_r (s, buf, sizeof (buf));
+		s = (temp > 0) ? buf : NULL;
+
+#ifdef DEBUG
+		printf ("Setting MAC %d to %s\n", devnum, s);
+#endif
+		for (x = 0; x < 6; ++x) {
+			dev->enetaddr[x] = s ? simple_strtoul (s, &e, 16) : 0;
+			if (s)
+				s = (*e) ? e + 1 : e;
+		}
+		/* ronen - set the MAC addr in the HW */
+		eth_port_uc_addr_set (devnum, dev->enetaddr, 0);
+
+		dev->init = (void *) db64460_eth_probe;
+		dev->halt = (void *) ethernet_phy_reset;
+		dev->send = (void *) db64460_eth_transmit;
+		dev->recv = (void *) db64460_eth_poll;
+
+		dev->priv = (void *) ethernet_private =
+			calloc (sizeof (*ethernet_private), 1);
+		if (!ethernet_private) {
+			printf ("%s: %s allocation failure, %s\n",
+				__FUNCTION__, dev->name,
+				"Private Device Structure");
+			free (dev);
+			return;
+		}
+		/* start with an zeroed ETH_PORT_INFO */
+		memset (ethernet_private, 0, sizeof (ETH_PORT_INFO));
+		memcpy (ethernet_private->port_mac_addr, dev->enetaddr, 6);
+
+		/* set pointer to memory for stats data structure etc... */
+		ethernet_private->port_private = (void *) port_private =
+			calloc (sizeof (*ethernet_private), 1);
+		if (!port_private) {
+			printf ("%s: %s allocation failure, %s\n",
+				__FUNCTION__, dev->name,
+				"Port Private Device Structure");
+
+			free (ethernet_private);
+			free (dev);
+			return;
+		}
+
+		port_private->stats =
+			calloc (sizeof (struct net_device_stats), 1);
+		if (!port_private->stats) {
+			printf ("%s: %s allocation failure, %s\n",
+				__FUNCTION__, dev->name,
+				"Net stat Structure");
+
+			free (port_private);
+			free (ethernet_private);
+			free (dev);
+			return;
+		}
+		memset (ethernet_private->port_private, 0,
+			sizeof (struct mv64460_eth_priv));
+		switch (devnum) {
+		case 0:
+			ethernet_private->port_num = ETH_0;
+			break;
+		case 1:
+			ethernet_private->port_num = ETH_1;
+			break;
+		case 2:
+			ethernet_private->port_num = ETH_2;
+			break;
+		default:
+			printf ("Invalid device number %d\n", devnum);
+			break;
+		};
+
+		port_private->port_num = devnum;
+		/*
+		 * Read MIB counter on the GT in order to reset them,
+		 * then zero all the stats fields in memory
+		 */
+		mv64460_eth_update_stat (dev);
+		memset (port_private->stats, 0,
+			sizeof (struct net_device_stats));
+		/* Extract the MAC address from the environment */
+		switch (devnum) {
+		case 0:
+			s = "ethaddr";
+			break;
+
+		case 1:
+			s = "eth1addr";
+			break;
+
+		case 2:
+			s = "eth2addr";
+			break;
+
+		default:	/* this should never happen */
+			printf ("%s: Invalid device number %d\n",
+				__FUNCTION__, devnum);
+			return;
+		}
+
+		temp = getenv_r (s, buf, sizeof (buf));
+		s = (temp > 0) ? buf : NULL;
+
+#ifdef DEBUG
+		printf ("Setting MAC %d to %s\n", devnum, s);
+#endif
+		for (x = 0; x < 6; ++x) {
+			dev->enetaddr[x] = s ? simple_strtoul (s, &e, 16) : 0;
+			if (s)
+				s = (*e) ? e + 1 : e;
+		}
+
+		DP (printf ("Allocating descriptor and buffer rings\n"));
+
+		ethernet_private->p_rx_desc_area_base[0] =
+			(ETH_RX_DESC *) memalign (16,
+						  RX_DESC_ALIGNED_SIZE *
+						  MV64460_RX_QUEUE_SIZE + 1);
+		ethernet_private->p_tx_desc_area_base[0] =
+			(ETH_TX_DESC *) memalign (16,
+						  TX_DESC_ALIGNED_SIZE *
+						  MV64460_TX_QUEUE_SIZE + 1);
+
+		ethernet_private->p_rx_buffer_base[0] =
+			(char *) memalign (16,
+					   MV64460_RX_QUEUE_SIZE *
+					   MV64460_TX_BUFFER_SIZE + 1);
+		ethernet_private->p_tx_buffer_base[0] =
+			(char *) memalign (16,
+					   MV64460_RX_QUEUE_SIZE *
+					   MV64460_TX_BUFFER_SIZE + 1);
+
+#ifdef DEBUG_MV_ETH
+		/* DEBUG OUTPUT prints adresses of globals */
+		print_globals (dev);
+#endif
+		eth_register (dev);
+
+	}
+	DP (printf ("%s: exit\n", __FUNCTION__));
+
+}
+
+/**********************************************************************
+ * mv64460_eth_open
+ *
+ * This function is called when openning the network device. The function
+ * should initialize all the hardware, initialize cyclic Rx/Tx
+ * descriptors chain and buffers and allocate an IRQ to the network
+ * device.
+ *
+ * Input : a pointer to the network device structure
+ * / / ronen - changed the output to match  net/eth.c needs
+ * Output : nonzero of success , zero if fails.
+ * under construction
+ **********************************************************************/
+
+int mv64460_eth_open (struct eth_device *dev)
+{
+	return (mv64460_eth_real_open (dev));
+}
+
+/* Helper function for mv64460_eth_open */
+static int mv64460_eth_real_open (struct eth_device *dev)
+{
+
+	unsigned int queue;
+	ETH_PORT_INFO *ethernet_private;
+	struct mv64460_eth_priv *port_private;
+	unsigned int port_num;
+	u32 port_status, phy_reg_data;
+
+	ethernet_private = (ETH_PORT_INFO *) dev->priv;
+	/* ronen - when we update the MAC env params we only update dev->enetaddr
+	   see ./net/eth.c eth_set_enetaddr() */
+	memcpy (ethernet_private->port_mac_addr, dev->enetaddr, 6);
+
+	port_private =
+		(struct mv64460_eth_priv *) ethernet_private->port_private;
+	port_num = port_private->port_num;
+
+	/* Stop RX Queues */
+	MV_REG_WRITE (MV64460_ETH_RECEIVE_QUEUE_COMMAND_REG (port_num),
+		      0x0000ff00);
+
+	/* Clear the ethernet port interrupts */
+	MV_REG_WRITE (MV64460_ETH_INTERRUPT_CAUSE_REG (port_num), 0);
+	MV_REG_WRITE (MV64460_ETH_INTERRUPT_CAUSE_EXTEND_REG (port_num), 0);
+
+	/* Unmask RX buffer and TX end interrupt */
+	MV_REG_WRITE (MV64460_ETH_INTERRUPT_MASK_REG (port_num),
+		      INT_CAUSE_UNMASK_ALL);
+
+	/* Unmask phy and link status changes interrupts */
+	MV_REG_WRITE (MV64460_ETH_INTERRUPT_EXTEND_MASK_REG (port_num),
+		      INT_CAUSE_UNMASK_ALL_EXT);
+
+	/* Set phy address of the port */
+	ethernet_private->port_phy_addr = 0x8 + port_num;
+
+	/* Activate the DMA channels etc */
+	eth_port_init (ethernet_private);
+
+
+	/* "Allocate" setup TX rings */
+
+	for (queue = 0; queue < MV64460_TX_QUEUE_NUM; queue++) {
+		unsigned int size;
+
+		port_private->tx_ring_size[queue] = MV64460_TX_QUEUE_SIZE;
+		size = (port_private->tx_ring_size[queue] * TX_DESC_ALIGNED_SIZE);	/*size = no of DESCs times DESC-size */
+		ethernet_private->tx_desc_area_size[queue] = size;
+
+		/* first clear desc area completely */
+		memset ((void *) ethernet_private->p_tx_desc_area_base[queue],
+			0, ethernet_private->tx_desc_area_size[queue]);
+
+		/* initialize tx desc ring with low level driver */
+		if (ether_init_tx_desc_ring
+		    (ethernet_private, ETH_Q0,
+		     port_private->tx_ring_size[queue],
+		     MV64460_TX_BUFFER_SIZE /* Each Buffer is 1600 Byte */ ,
+		     (unsigned int) ethernet_private->
+		     p_tx_desc_area_base[queue],
+		     (unsigned int) ethernet_private->
+		     p_tx_buffer_base[queue]) == false)
+			printf ("### Error initializing TX Ring\n");
+	}
+
+	/* "Allocate" setup RX rings */
+	for (queue = 0; queue < MV64460_RX_QUEUE_NUM; queue++) {
+		unsigned int size;
+
+		/* Meantime RX Ring are fixed - but must be configurable by user */
+		port_private->rx_ring_size[queue] = MV64460_RX_QUEUE_SIZE;
+		size = (port_private->rx_ring_size[queue] *
+			RX_DESC_ALIGNED_SIZE);
+		ethernet_private->rx_desc_area_size[queue] = size;
+
+		/* first clear desc area completely */
+		memset ((void *) ethernet_private->p_rx_desc_area_base[queue],
+			0, ethernet_private->rx_desc_area_size[queue]);
+		if ((ether_init_rx_desc_ring
+		     (ethernet_private, ETH_Q0,
+		      port_private->rx_ring_size[queue],
+		      MV64460_RX_BUFFER_SIZE /* Each Buffer is 1600 Byte */ ,
+		      (unsigned int) ethernet_private->
+		      p_rx_desc_area_base[queue],
+		      (unsigned int) ethernet_private->
+		      p_rx_buffer_base[queue])) == false)
+			printf ("### Error initializing RX Ring\n");
+	}
+
+	eth_port_start (ethernet_private);
+
+	/* Set maximum receive buffer to 9700 bytes */
+	MV_REG_WRITE (MV64460_ETH_PORT_SERIAL_CONTROL_REG (port_num),
+		      (0x5 << 17) |
+		      (MV_REG_READ
+		       (MV64460_ETH_PORT_SERIAL_CONTROL_REG (port_num))
+		       & 0xfff1ffff));
+
+	/*
+	 * Set ethernet MTU for leaky bucket mechanism to 0 - this will
+	 * disable the leaky bucket mechanism .
+	 */
+
+	MV_REG_WRITE (MV64460_ETH_MAXIMUM_TRANSMIT_UNIT (port_num), 0);
+	port_status = MV_REG_READ (MV64460_ETH_PORT_STATUS_REG (port_num));
+
+	/* Check Link status on phy */
+	eth_port_read_smi_reg (port_num, 1, &phy_reg_data);
+	if (!(phy_reg_data & 0x20)) {
+		/* Reset PHY */
+		if ((ethernet_phy_reset (port_num)) != true) {
+			printf ("$$ Warnning: No link on port %d \n",
+				port_num);
+			return 0;
+		} else {
+			eth_port_read_smi_reg (port_num, 1, &phy_reg_data);
+			if (!(phy_reg_data & 0x20)) {
+				printf ("### Error: Phy is not active\n");
+				return 0;
+			}
+		}
+	} else {
+		mv64460_eth_print_phy_status (dev);
+	}
+	port_private->eth_running = MAGIC_ETH_RUNNING;
+	return 1;
+}
+
+
+static int mv64460_eth_free_tx_rings (struct eth_device *dev)
+{
+	unsigned int queue;
+	ETH_PORT_INFO *ethernet_private;
+	struct mv64460_eth_priv *port_private;
+	unsigned int port_num;
+	volatile ETH_TX_DESC *p_tx_curr_desc;
+
+	ethernet_private = (ETH_PORT_INFO *) dev->priv;
+	port_private =
+		(struct mv64460_eth_priv *) ethernet_private->port_private;
+	port_num = port_private->port_num;
+
+	/* Stop Tx Queues */
+	MV_REG_WRITE (MV64460_ETH_TRANSMIT_QUEUE_COMMAND_REG (port_num),
+		      0x0000ff00);
+
+	/* Free TX rings */
+	DP (printf ("Clearing previously allocated TX queues... "));
+	for (queue = 0; queue < MV64460_TX_QUEUE_NUM; queue++) {
+		/* Free on TX rings */
+		for (p_tx_curr_desc =
+		     ethernet_private->p_tx_desc_area_base[queue];
+		     ((unsigned int) p_tx_curr_desc <= (unsigned int)
+		      ethernet_private->p_tx_desc_area_base[queue] +
+		      ethernet_private->tx_desc_area_size[queue]);
+		     p_tx_curr_desc =
+		     (ETH_TX_DESC *) ((unsigned int) p_tx_curr_desc +
+				      TX_DESC_ALIGNED_SIZE)) {
+			/* this is inside for loop */
+			if (p_tx_curr_desc->return_info != 0) {
+				p_tx_curr_desc->return_info = 0;
+				DP (printf ("freed\n"));
+			}
+		}
+		DP (printf ("Done\n"));
+	}
+	return 0;
+}
+
+static int mv64460_eth_free_rx_rings (struct eth_device *dev)
+{
+	unsigned int queue;
+	ETH_PORT_INFO *ethernet_private;
+	struct mv64460_eth_priv *port_private;
+	unsigned int port_num;
+	volatile ETH_RX_DESC *p_rx_curr_desc;
+
+	ethernet_private = (ETH_PORT_INFO *) dev->priv;
+	port_private =
+		(struct mv64460_eth_priv *) ethernet_private->port_private;
+	port_num = port_private->port_num;
+
+
+	/* Stop RX Queues */
+	MV_REG_WRITE (MV64460_ETH_RECEIVE_QUEUE_COMMAND_REG (port_num),
+		      0x0000ff00);
+
+	/* Free RX rings */
+	DP (printf ("Clearing previously allocated RX queues... "));
+	for (queue = 0; queue < MV64460_RX_QUEUE_NUM; queue++) {
+		/* Free preallocated skb's on RX rings */
+		for (p_rx_curr_desc =
+		     ethernet_private->p_rx_desc_area_base[queue];
+		     (((unsigned int) p_rx_curr_desc <
+		       ((unsigned int) ethernet_private->
+			p_rx_desc_area_base[queue] +
+			ethernet_private->rx_desc_area_size[queue])));
+		     p_rx_curr_desc =
+		     (ETH_RX_DESC *) ((unsigned int) p_rx_curr_desc +
+				      RX_DESC_ALIGNED_SIZE)) {
+			if (p_rx_curr_desc->return_info != 0) {
+				p_rx_curr_desc->return_info = 0;
+				DP (printf ("freed\n"));
+			}
+		}
+		DP (printf ("Done\n"));
+	}
+	return 0;
+}
+
+/**********************************************************************
+ * mv64460_eth_stop
+ *
+ * This function is used when closing the network device.
+ * It updates the hardware,
+ * release all memory that holds buffers and descriptors and release the IRQ.
+ * Input : a pointer to the device structure
+ * Output : zero if success , nonzero if fails
+ *********************************************************************/
+
+int mv64460_eth_stop (struct eth_device *dev)
+{
+	ETH_PORT_INFO *ethernet_private;
+	struct mv64460_eth_priv *port_private;
+	unsigned int port_num;
+
+	ethernet_private = (ETH_PORT_INFO *) dev->priv;
+	port_private =
+		(struct mv64460_eth_priv *) ethernet_private->port_private;
+	port_num = port_private->port_num;
+
+	/* Disable all gigE address decoder */
+	MV_REG_WRITE (MV64460_ETH_BASE_ADDR_ENABLE_REG, 0x3f);
+	DP (printf ("%s Ethernet stop called ... \n", __FUNCTION__));
+	mv64460_eth_real_stop (dev);
+
+	return 0;
+};
+
+/* Helper function for mv64460_eth_stop */
+
+static int mv64460_eth_real_stop (struct eth_device *dev)
+{
+	ETH_PORT_INFO *ethernet_private;
+	struct mv64460_eth_priv *port_private;
+	unsigned int port_num;
+
+	ethernet_private = (ETH_PORT_INFO *) dev->priv;
+	port_private =
+		(struct mv64460_eth_priv *) ethernet_private->port_private;
+	port_num = port_private->port_num;
+
+
+	mv64460_eth_free_tx_rings (dev);
+	mv64460_eth_free_rx_rings (dev);
+
+	eth_port_reset (ethernet_private->port_num);
+	/* Disable ethernet port interrupts */
+	MV_REG_WRITE (MV64460_ETH_INTERRUPT_CAUSE_REG (port_num), 0);
+	MV_REG_WRITE (MV64460_ETH_INTERRUPT_CAUSE_EXTEND_REG (port_num), 0);
+	/* Mask RX buffer and TX end interrupt */
+	MV_REG_WRITE (MV64460_ETH_INTERRUPT_MASK_REG (port_num), 0);
+	/* Mask phy and link status changes interrupts */
+	MV_REG_WRITE (MV64460_ETH_INTERRUPT_EXTEND_MASK_REG (port_num), 0);
+	MV_RESET_REG_BITS (MV64460_CPU_INTERRUPT0_MASK_HIGH,
+			   BIT0 << port_num);
+	/* Print Network statistics */
+#ifndef  UPDATE_STATS_BY_SOFTWARE
+	/*
+	 * Print statistics (only if ethernet is running),
+	 * then zero all the stats fields in memory
+	 */
+	if (port_private->eth_running == MAGIC_ETH_RUNNING) {
+		port_private->eth_running = 0;
+		mv64460_eth_print_stat (dev);
+	}
+	memset (port_private->stats, 0, sizeof (struct net_device_stats));
+#endif
+	DP (printf ("\nEthernet stopped ... \n"));
+	return 0;
+}
+
+
+/**********************************************************************
+ * mv64460_eth_start_xmit
+ *
+ * This function is queues a packet in the Tx descriptor for
+ * required port.
+ *
+ * Input : skb - a pointer to socket buffer
+ *         dev - a pointer to the required port
+ *
+ * Output : zero upon success
+ **********************************************************************/
+
+int mv64460_eth_xmit (struct eth_device *dev, volatile void *dataPtr,
+		      int dataSize)
+{
+	ETH_PORT_INFO *ethernet_private;
+	struct mv64460_eth_priv *port_private;
+	unsigned int port_num;
+	PKT_INFO pkt_info;
+	ETH_FUNC_RET_STATUS status;
+	struct net_device_stats *stats;
+	ETH_FUNC_RET_STATUS release_result;
+
+	ethernet_private = (ETH_PORT_INFO *) dev->priv;
+	port_private =
+		(struct mv64460_eth_priv *) ethernet_private->port_private;
+	port_num = port_private->port_num;
+
+	stats = port_private->stats;
+
+	/* Update packet info data structure */
+	pkt_info.cmd_sts = ETH_TX_FIRST_DESC | ETH_TX_LAST_DESC;	/* DMA owned, first last */
+	pkt_info.byte_cnt = dataSize;
+	pkt_info.buf_ptr = (unsigned int) dataPtr;
+
+	status = eth_port_send (ethernet_private, ETH_Q0, &pkt_info);
+	if ((status == ETH_ERROR) || (status == ETH_QUEUE_FULL)) {
+		printf ("Error on transmitting packet ..");
+		if (status == ETH_QUEUE_FULL)
+			printf ("ETH Queue is full. \n");
+		if (status == ETH_QUEUE_LAST_RESOURCE)
+			printf ("ETH Queue: using last available resource. \n");
+		goto error;
+	}
+
+	/* Update statistics and start of transmittion time */
+	stats->tx_bytes += dataSize;
+	stats->tx_packets++;
+
+	/* Check if packet(s) is(are) transmitted correctly (release everything) */
+	do {
+		release_result =
+			eth_tx_return_desc (ethernet_private, ETH_Q0,
+					    &pkt_info);
+		switch (release_result) {
+		case ETH_OK:
+			DP (printf ("descriptor released\n"));
+			if (pkt_info.cmd_sts & BIT0) {
+				printf ("Error in TX\n");
+				stats->tx_errors++;
+
+			}
+			break;
+		case ETH_RETRY:
+			DP (printf ("transmission still in process\n"));
+			break;
+
+		case ETH_ERROR:
+			printf ("routine can not access Tx desc ring\n");
+			break;
+
+		case ETH_END_OF_JOB:
+			DP (printf ("the routine has nothing to release\n"));
+			break;
+		default:	/* should not happen */
+			break;
+		}
+	} while (release_result == ETH_OK);
+
+
+	return 0;		/* success */
+      error:
+	return 1;		/* Failed - higher layers will free the skb */
+}
+
+/**********************************************************************
+ * mv64460_eth_receive
+ *
+ * This function is forward packets that are received from the port's
+ * queues toward kernel core or FastRoute them to another interface.
+ *
+ * Input : dev - a pointer to the required interface
+ *         max - maximum number to receive (0 means unlimted)
+ *
+ * Output : number of served packets
+ **********************************************************************/
+
+int mv64460_eth_receive (struct eth_device *dev)
+{
+	ETH_PORT_INFO *ethernet_private;
+	struct mv64460_eth_priv *port_private;
+	unsigned int port_num;
+	PKT_INFO pkt_info;
+	struct net_device_stats *stats;
+
+
+	ethernet_private = (ETH_PORT_INFO *) dev->priv;
+	port_private =
+		(struct mv64460_eth_priv *) ethernet_private->port_private;
+	port_num = port_private->port_num;
+	stats = port_private->stats;
+
+	while ((eth_port_receive (ethernet_private, ETH_Q0, &pkt_info) ==
+		ETH_OK)) {
+
+#ifdef DEBUG_MV_ETH
+		if (pkt_info.byte_cnt != 0) {
+			printf ("%s: Received %d byte Packet @ 0x%x\n",
+				__FUNCTION__, pkt_info.byte_cnt,
+				pkt_info.buf_ptr);
+		}
+#endif
+		/* Update statistics. Note byte count includes 4 byte CRC count */
+		stats->rx_packets++;
+		stats->rx_bytes += pkt_info.byte_cnt;
+
+		/*
+		 * In case received a packet without first / last bits on OR the error
+		 * summary bit is on, the packets needs to be dropeed.
+		 */
+		if (((pkt_info.
+		      cmd_sts & (ETH_RX_FIRST_DESC | ETH_RX_LAST_DESC)) !=
+		     (ETH_RX_FIRST_DESC | ETH_RX_LAST_DESC))
+		    || (pkt_info.cmd_sts & ETH_ERROR_SUMMARY)) {
+			stats->rx_dropped++;
+
+			printf ("Received packet spread on multiple descriptors\n");
+
+			/* Is this caused by an error ? */
+			if (pkt_info.cmd_sts & ETH_ERROR_SUMMARY) {
+				stats->rx_errors++;
+			}
+
+			/* free these descriptors again without forwarding them to the higher layers */
+			pkt_info.buf_ptr &= ~0x7;	/* realign buffer again */
+			pkt_info.byte_cnt = 0x0000;	/* Reset Byte count */
+
+			if (eth_rx_return_buff
+			    (ethernet_private, ETH_Q0, &pkt_info) != ETH_OK) {
+				printf ("Error while returning the RX Desc to Ring\n");
+			} else {
+				DP (printf ("RX Desc returned to Ring\n"));
+			}
+			/* /free these descriptors again */
+		} else {
+
+/* !!! call higher layer processing */
+#ifdef DEBUG_MV_ETH
+			printf ("\nNow send it to upper layer protocols (NetReceive) ...\n");
+#endif
+			/* let the upper layer handle the packet */
+			NetReceive ((uchar *) pkt_info.buf_ptr,
+				    (int) pkt_info.byte_cnt);
+
+/* **************************************************************** */
+/* free descriptor  */
+			pkt_info.buf_ptr &= ~0x7;	/* realign buffer again */
+			pkt_info.byte_cnt = 0x0000;	/* Reset Byte count */
+			DP (printf
+			    ("RX: pkt_info.buf_ptr =	%x\n",
+			     pkt_info.buf_ptr));
+			if (eth_rx_return_buff
+			    (ethernet_private, ETH_Q0, &pkt_info) != ETH_OK) {
+				printf ("Error while returning the RX Desc to Ring\n");
+			} else {
+				DP (printf ("RX Desc returned to Ring\n"));
+			}
+
+/* **************************************************************** */
+
+		}
+	}
+	mv64460_eth_get_stats (dev);	/* update statistics */
+	return 1;
+}
+
+/**********************************************************************
+ * mv64460_eth_get_stats
+ *
+ * Returns a pointer to the interface statistics.
+ *
+ * Input : dev - a pointer to the required interface
+ *
+ * Output : a pointer to the interface's statistics
+ **********************************************************************/
+
+static struct net_device_stats *mv64460_eth_get_stats (struct eth_device *dev)
+{
+	ETH_PORT_INFO *ethernet_private;
+	struct mv64460_eth_priv *port_private;
+	unsigned int port_num;
+
+	ethernet_private = (ETH_PORT_INFO *) dev->priv;
+	port_private =
+		(struct mv64460_eth_priv *) ethernet_private->port_private;
+	port_num = port_private->port_num;
+
+	mv64460_eth_update_stat (dev);
+
+	return port_private->stats;
+}
+
+
+/**********************************************************************
+ * mv64460_eth_update_stat
+ *
+ * Update the statistics structure in the private data structure
+ *
+ * Input : pointer to ethernet interface network device structure
+ * Output : N/A
+ **********************************************************************/
+
+static void mv64460_eth_update_stat (struct eth_device *dev)
+{
+	ETH_PORT_INFO *ethernet_private;
+	struct mv64460_eth_priv *port_private;
+	struct net_device_stats *stats;
+	unsigned int port_num;
+	volatile unsigned int dummy;
+
+	ethernet_private = (ETH_PORT_INFO *) dev->priv;
+	port_private =
+		(struct mv64460_eth_priv *) ethernet_private->port_private;
+	port_num = port_private->port_num;
+	stats = port_private->stats;
+
+	/* These are false updates */
+	stats->rx_packets += (unsigned long)
+		eth_read_mib_counter (ethernet_private->port_num,
+				      ETH_MIB_GOOD_FRAMES_RECEIVED);
+	stats->tx_packets += (unsigned long)
+		eth_read_mib_counter (ethernet_private->port_num,
+				      ETH_MIB_GOOD_FRAMES_SENT);
+	stats->rx_bytes += (unsigned long)
+		eth_read_mib_counter (ethernet_private->port_num,
+				      ETH_MIB_GOOD_OCTETS_RECEIVED_LOW);
+	/*
+	 * Ideally this should be as follows -
+	 *
+	 *   stats->rx_bytes   += stats->rx_bytes +
+	 * ((unsigned long) ethReadMibCounter (ethernet_private->port_num ,
+	 * ETH_MIB_GOOD_OCTETS_RECEIVED_HIGH) << 32);
+	 *
+	 * But the unsigned long in PowerPC and MIPS are 32bit. So the next read
+	 * is just a dummy read for proper work of the GigE port
+	 */
+	dummy = eth_read_mib_counter (ethernet_private->port_num,
+				      ETH_MIB_GOOD_OCTETS_RECEIVED_HIGH);
+	stats->tx_bytes += (unsigned long)
+		eth_read_mib_counter (ethernet_private->port_num,
+				      ETH_MIB_GOOD_OCTETS_SENT_LOW);
+	dummy = eth_read_mib_counter (ethernet_private->port_num,
+				      ETH_MIB_GOOD_OCTETS_SENT_HIGH);
+	stats->rx_errors += (unsigned long)
+		eth_read_mib_counter (ethernet_private->port_num,
+				      ETH_MIB_MAC_RECEIVE_ERROR);
+
+	/* Rx dropped is for received packet with CRC error */
+	stats->rx_dropped +=
+		(unsigned long) eth_read_mib_counter (ethernet_private->
+						      port_num,
+						      ETH_MIB_BAD_CRC_EVENT);
+	stats->multicast += (unsigned long)
+		eth_read_mib_counter (ethernet_private->port_num,
+				      ETH_MIB_MULTICAST_FRAMES_RECEIVED);
+	stats->collisions +=
+		(unsigned long) eth_read_mib_counter (ethernet_private->
+						      port_num,
+						      ETH_MIB_COLLISION) +
+		(unsigned long) eth_read_mib_counter (ethernet_private->
+						      port_num,
+						      ETH_MIB_LATE_COLLISION);
+	/* detailed rx errors */
+	stats->rx_length_errors +=
+		(unsigned long) eth_read_mib_counter (ethernet_private->
+						      port_num,
+						      ETH_MIB_UNDERSIZE_RECEIVED)
+		+
+		(unsigned long) eth_read_mib_counter (ethernet_private->
+						      port_num,
+						      ETH_MIB_OVERSIZE_RECEIVED);
+	/* detailed tx errors */
+}
+
+#ifndef  UPDATE_STATS_BY_SOFTWARE
+/**********************************************************************
+ * mv64460_eth_print_stat
+ *
+ * Update the statistics structure in the private data structure
+ *
+ * Input : pointer to ethernet interface network device structure
+ * Output : N/A
+ **********************************************************************/
+
+static void mv64460_eth_print_stat (struct eth_device *dev)
+{
+	ETH_PORT_INFO *ethernet_private;
+	struct mv64460_eth_priv *port_private;
+	struct net_device_stats *stats;
+	unsigned int port_num;
+
+	ethernet_private = (ETH_PORT_INFO *) dev->priv;
+	port_private =
+		(struct mv64460_eth_priv *) ethernet_private->port_private;
+	port_num = port_private->port_num;
+	stats = port_private->stats;
+
+	/* These are false updates */
+	printf ("\n### Network statistics: ###\n");
+	printf ("--------------------------\n");
+	printf (" Packets received:		%ld\n", stats->rx_packets);
+	printf (" Packets send:			%ld\n", stats->tx_packets);
+	printf (" Received bytes:		%ld\n", stats->rx_bytes);
+	printf (" Send bytes:			%ld\n", stats->tx_bytes);
+	if (stats->rx_errors != 0)
+		printf (" Rx Errors:			%ld\n",
+			stats->rx_errors);
+	if (stats->rx_dropped != 0)
+		printf (" Rx dropped (CRC Errors):	%ld\n",
+			stats->rx_dropped);
+	if (stats->multicast != 0)
+		printf (" Rx mulicast frames:		%ld\n",
+			stats->multicast);
+	if (stats->collisions != 0)
+		printf (" No. of collisions:		%ld\n",
+			stats->collisions);
+	if (stats->rx_length_errors != 0)
+		printf (" Rx length errors:		%ld\n",
+			stats->rx_length_errors);
+}
+#endif
+
+/**************************************************************************
+ *network_start - Network Kick Off Routine UBoot
+ *Inputs :
+ *Outputs :
+ **************************************************************************/
+
+bool db64460_eth_start (struct eth_device *dev)
+{
+	return (mv64460_eth_open (dev));	/* calls real open */
+}
+
+/*************************************************************************
+**************************************************************************
+**************************************************************************
+*  The second part is the low level driver of the gigE ethernet ports.   *
+**************************************************************************
+**************************************************************************
+*************************************************************************/
+/*
+ * based on Linux code
+ * arch/ppc/galileo/EVB64460/mv64460_eth.c - Driver for MV64460X ethernet ports
+ * Copyright (C) 2002 rabeeh@galileo.co.il
+
+ * 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.
+ *
+ */
+
+/********************************************************************************
+ * Marvell's Gigabit Ethernet controller low level driver
+ *
+ * DESCRIPTION:
+ *       This file introduce low level API to Marvell's Gigabit Ethernet
+ *		controller. This Gigabit Ethernet Controller driver API controls
+ *		1) Operations (i.e. port init, start, reset etc').
+ *		2) Data flow (i.e. port send, receive etc').
+ *		Each Gigabit Ethernet port is controlled via ETH_PORT_INFO
+ *		struct.
+ *		This struct includes user configuration information as well as
+ *		driver internal data needed for its operations.
+ *
+ *		Supported Features:
+ *		- This low level driver is OS independent. Allocating memory for
+ *		  the descriptor rings and buffers are not within the scope of
+ *		  this driver.
+ *		- The user is free from Rx/Tx queue managing.
+ *		- This low level driver introduce functionality API that enable
+ *		  the to operate Marvell's Gigabit Ethernet Controller in a
+ *		  convenient way.
+ *		- Simple Gigabit Ethernet port operation API.
+ *		- Simple Gigabit Ethernet port data flow API.
+ *		- Data flow and operation API support per queue functionality.
+ *		- Support cached descriptors for better performance.
+ *		- Enable access to all four DRAM banks and internal SRAM memory
+ *		  spaces.
+ *		- PHY access and control API.
+ *		- Port control register configuration API.
+ *		- Full control over Unicast and Multicast MAC configurations.
+ *
+ *		Operation flow:
+ *
+ *		Initialization phase
+ *		This phase complete the initialization of the ETH_PORT_INFO
+ *		struct.
+ *		User information regarding port configuration has to be set
+ *		prior to calling the port initialization routine. For example,
+ *		the user has to assign the port_phy_addr field which is board
+ *		depended parameter.
+ *		In this phase any port Tx/Rx activity is halted, MIB counters
+ *		are cleared, PHY address is set according to user parameter and
+ *		access to DRAM and internal SRAM memory spaces.
+ *
+ *		Driver ring initialization
+ *		Allocating memory for the descriptor rings and buffers is not
+ *		within the scope of this driver. Thus, the user is required to
+ *		allocate memory for the descriptors ring and buffers. Those
+ *		memory parameters are used by the Rx and Tx ring initialization
+ *		routines in order to curve the descriptor linked list in a form
+ *		of a ring.
+ *		Note: Pay special attention to alignment issues when using
+ *		cached descriptors/buffers. In this phase the driver store
+ *		information in the ETH_PORT_INFO struct regarding each queue
+ *		ring.
+ *
+ *		Driver start
+ *		This phase prepares the Ethernet port for Rx and Tx activity.
+ *		It uses the information stored in the ETH_PORT_INFO struct to
+ *		initialize the various port registers.
+ *
+ *		Data flow:
+ *		All packet references to/from the driver are done using PKT_INFO
+ *		struct.
+ *		This struct is a unified struct used with Rx and Tx operations.
+ *		This way the user is not required to be familiar with neither
+ *		Tx nor Rx descriptors structures.
+ *		The driver's descriptors rings are management by indexes.
+ *		Those indexes controls the ring resources and used to indicate
+ *		a SW resource error:
+ *		'current'
+ *		This index points to the current available resource for use. For
+ *		example in Rx process this index will point to the descriptor
+ *		that will be passed to the user upon calling the receive routine.
+ *		In Tx process, this index will point to the descriptor
+ *		that will be assigned with the user packet info and transmitted.
+ *		'used'
+ *		This index points to the descriptor that need to restore its
+ *		resources. For example in Rx process, using the Rx buffer return
+ *		API will attach the buffer returned in packet info to the
+ *		descriptor pointed by 'used'. In Tx process, using the Tx
+ *		descriptor return will merely return the user packet info with
+ *		the command status of  the transmitted buffer pointed by the
+ *		'used' index. Nevertheless, it is essential to use this routine
+ *		to update the 'used' index.
+ *		'first'
+ *		This index supports Tx Scatter-Gather. It points to the first
+ *		descriptor of a packet assembled of multiple buffers. For example
+ *		when in middle of Such packet we have a Tx resource error the
+ *		'curr' index get the value of 'first' to indicate that the ring
+ *		returned to its state before trying to transmit this packet.
+ *
+ *		Receive operation:
+ *		The eth_port_receive API set the packet information struct,
+ *		passed by the caller, with received information from the
+ *		'current' SDMA descriptor.
+ *		It is the user responsibility to return this resource back
+ *		to the Rx descriptor ring to enable the reuse of this source.
+ *		Return Rx resource is done using the eth_rx_return_buff API.
+ *
+ *		Transmit operation:
+ *		The eth_port_send API supports Scatter-Gather which enables to
+ *		send a packet spanned over multiple buffers. This means that
+ *		for each packet info structure given by the user and put into
+ *		the Tx descriptors ring, will be transmitted only if the 'LAST'
+ *		bit will be set in the packet info command status field. This
+ *		API also consider restriction regarding buffer alignments and
+ *		sizes.
+ *		The user must return a Tx resource after ensuring the buffer
+ *		has been transmitted to enable the Tx ring indexes to update.
+ *
+ *		BOARD LAYOUT
+ *		This device is on-board.  No jumper diagram is necessary.
+ *
+ *		EXTERNAL INTERFACE
+ *
+ *       Prior to calling the initialization routine eth_port_init() the user
+ *	 must set the following fields under ETH_PORT_INFO struct:
+ *       port_num             User Ethernet port number.
+ *       port_phy_addr		    User PHY address of Ethernet port.
+ *       port_mac_addr[6]	    User defined port MAC address.
+ *       port_config          User port configuration value.
+ *       port_config_extend    User port config extend value.
+ *       port_sdma_config      User port SDMA config value.
+ *       port_serial_control   User port serial control value.
+ *       *port_virt_to_phys ()  User function to cast virtual addr to CPU bus addr.
+ *       *port_private        User scratch pad for user specific data structures.
+ *
+ *       This driver introduce a set of default values:
+ *       PORT_CONFIG_VALUE           Default port configuration value
+ *       PORT_CONFIG_EXTEND_VALUE    Default port extend configuration value
+ *       PORT_SDMA_CONFIG_VALUE      Default sdma control value
+ *       PORT_SERIAL_CONTROL_VALUE   Default port serial control value
+ *
+ *		This driver data flow is done using the PKT_INFO struct which is
+ *		a unified struct for Rx and Tx operations:
+ *		byte_cnt	Tx/Rx descriptor buffer byte count.
+ *		l4i_chk		CPU provided TCP Checksum. For Tx operation only.
+ *		cmd_sts		Tx/Rx descriptor command status.
+ *		buf_ptr		Tx/Rx descriptor buffer pointer.
+ *		return_info	Tx/Rx user resource return information.
+ *
+ *
+ *		EXTERNAL SUPPORT REQUIREMENTS
+ *
+ *		This driver requires the following external support:
+ *
+ *		D_CACHE_FLUSH_LINE (address, address offset)
+ *
+ *		This macro applies assembly code to flush and invalidate cache
+ *		line.
+ *		address        - address base.
+ *		address offset - address offset
+ *
+ *
+ *		CPU_PIPE_FLUSH
+ *
+ *		This macro applies assembly code to flush the CPU pipeline.
+ *
+ *******************************************************************************/
+/* includes */
+
+/* defines */
+/* SDMA command macros */
+#define ETH_ENABLE_TX_QUEUE(tx_queue, eth_port) \
+ MV_REG_WRITE(MV64460_ETH_TRANSMIT_QUEUE_COMMAND_REG(eth_port), (1 << tx_queue))
+
+#define ETH_DISABLE_TX_QUEUE(tx_queue, eth_port) \
+ MV_REG_WRITE(MV64460_ETH_TRANSMIT_QUEUE_COMMAND_REG(eth_port),\
+ (1 << (8 + tx_queue)))
+
+#define ETH_ENABLE_RX_QUEUE(rx_queue, eth_port) \
+MV_REG_WRITE(MV64460_ETH_RECEIVE_QUEUE_COMMAND_REG(eth_port), (1 << rx_queue))
+
+#define ETH_DISABLE_RX_QUEUE(rx_queue, eth_port) \
+MV_REG_WRITE(MV64460_ETH_RECEIVE_QUEUE_COMMAND_REG(eth_port), (1 << (8 + rx_queue)))
+
+#define CURR_RFD_GET(p_curr_desc, queue) \
+ ((p_curr_desc) = p_eth_port_ctrl->p_rx_curr_desc_q[queue])
+
+#define CURR_RFD_SET(p_curr_desc, queue) \
+ (p_eth_port_ctrl->p_rx_curr_desc_q[queue] = (p_curr_desc))
+
+#define USED_RFD_GET(p_used_desc, queue) \
+ ((p_used_desc) = p_eth_port_ctrl->p_rx_used_desc_q[queue])
+
+#define USED_RFD_SET(p_used_desc, queue)\
+(p_eth_port_ctrl->p_rx_used_desc_q[queue] = (p_used_desc))
+
+
+#define CURR_TFD_GET(p_curr_desc, queue) \
+ ((p_curr_desc) = p_eth_port_ctrl->p_tx_curr_desc_q[queue])
+
+#define CURR_TFD_SET(p_curr_desc, queue) \
+ (p_eth_port_ctrl->p_tx_curr_desc_q[queue] = (p_curr_desc))
+
+#define USED_TFD_GET(p_used_desc, queue) \
+ ((p_used_desc) = p_eth_port_ctrl->p_tx_used_desc_q[queue])
+
+#define USED_TFD_SET(p_used_desc, queue) \
+ (p_eth_port_ctrl->p_tx_used_desc_q[queue] = (p_used_desc))
+
+#define FIRST_TFD_GET(p_first_desc, queue) \
+ ((p_first_desc) = p_eth_port_ctrl->p_tx_first_desc_q[queue])
+
+#define FIRST_TFD_SET(p_first_desc, queue) \
+ (p_eth_port_ctrl->p_tx_first_desc_q[queue] = (p_first_desc))
+
+
+/* Macros that save access to desc in order to find next desc pointer  */
+#define RX_NEXT_DESC_PTR(p_rx_desc, queue) (ETH_RX_DESC*)(((((unsigned int)p_rx_desc - (unsigned int)p_eth_port_ctrl->p_rx_desc_area_base[queue]) + RX_DESC_ALIGNED_SIZE) % p_eth_port_ctrl->rx_desc_area_size[queue]) + (unsigned int)p_eth_port_ctrl->p_rx_desc_area_base[queue])
+
+#define TX_NEXT_DESC_PTR(p_tx_desc, queue) (ETH_TX_DESC*)(((((unsigned int)p_tx_desc - (unsigned int)p_eth_port_ctrl->p_tx_desc_area_base[queue]) + TX_DESC_ALIGNED_SIZE) % p_eth_port_ctrl->tx_desc_area_size[queue]) + (unsigned int)p_eth_port_ctrl->p_tx_desc_area_base[queue])
+
+#define LINK_UP_TIMEOUT		100000
+#define PHY_BUSY_TIMEOUT    10000000
+
+/* locals */
+
+/* PHY routines */
+static void ethernet_phy_set (ETH_PORT eth_port_num, int phy_addr);
+static int ethernet_phy_get (ETH_PORT eth_port_num);
+
+/* Ethernet Port routines */
+static void eth_set_access_control (ETH_PORT eth_port_num,
+				    ETH_WIN_PARAM * param);
+static bool eth_port_uc_addr (ETH_PORT eth_port_num, unsigned char uc_nibble,
+			      ETH_QUEUE queue, int option);
+#if 0				/* FIXME */
+static bool eth_port_smc_addr (ETH_PORT eth_port_num,
+			       unsigned char mc_byte,
+			       ETH_QUEUE queue, int option);
+static bool eth_port_omc_addr (ETH_PORT eth_port_num,
+			       unsigned char crc8,
+			       ETH_QUEUE queue, int option);
+#endif
+
+static void eth_b_copy (unsigned int src_addr, unsigned int dst_addr,
+			int byte_count);
+
+void eth_dbg (ETH_PORT_INFO * p_eth_port_ctrl);
+
+
+typedef enum _memory_bank { BANK0, BANK1, BANK2, BANK3 } MEMORY_BANK;
+u32 mv_get_dram_bank_base_addr (MEMORY_BANK bank)
+{
+	u32 result = 0;
+	u32 enable = MV_REG_READ (MV64460_BASE_ADDR_ENABLE);
+
+	if (enable & (1 << bank))
+		return 0;
+	if (bank == BANK0)
+		result = MV_REG_READ (MV64460_CS_0_BASE_ADDR);
+	if (bank == BANK1)
+		result = MV_REG_READ (MV64460_CS_1_BASE_ADDR);
+	if (bank == BANK2)
+		result = MV_REG_READ (MV64460_CS_2_BASE_ADDR);
+	if (bank == BANK3)
+		result = MV_REG_READ (MV64460_CS_3_BASE_ADDR);
+	result &= 0x0000ffff;
+	result = result << 16;
+	return result;
+}
+
+u32 mv_get_dram_bank_size (MEMORY_BANK bank)
+{
+	u32 result = 0;
+	u32 enable = MV_REG_READ (MV64460_BASE_ADDR_ENABLE);
+
+	if (enable & (1 << bank))
+		return 0;
+	if (bank == BANK0)
+		result = MV_REG_READ (MV64460_CS_0_SIZE);
+	if (bank == BANK1)
+		result = MV_REG_READ (MV64460_CS_1_SIZE);
+	if (bank == BANK2)
+		result = MV_REG_READ (MV64460_CS_2_SIZE);
+	if (bank == BANK3)
+		result = MV_REG_READ (MV64460_CS_3_SIZE);
+	result += 1;
+	result &= 0x0000ffff;
+	result = result << 16;
+	return result;
+}
+
+u32 mv_get_internal_sram_base (void)
+{
+	u32 result;
+
+	result = MV_REG_READ (MV64460_INTEGRATED_SRAM_BASE_ADDR);
+	result &= 0x0000ffff;
+	result = result << 16;
+	return result;
+}
+
+/*******************************************************************************
+* eth_port_init - Initialize the Ethernet port driver
+*
+* DESCRIPTION:
+*       This function prepares the ethernet port to start its activity:
+*       1) Completes the ethernet port driver struct initialization toward port
+*           start routine.
+*       2) Resets the device to a quiescent state in case of warm reboot.
+*       3) Enable SDMA access to all four DRAM banks as well as internal SRAM.
+*       4) Clean MAC tables. The reset status of those tables is unknown.
+*       5) Set PHY address.
+*       Note: Call this routine prior to eth_port_start routine and after setting
+*       user values in the user fields of Ethernet port control struct (i.e.
+*       port_phy_addr).
+*
+* INPUT:
+*       ETH_PORT_INFO 	*p_eth_port_ctrl       Ethernet port control struct
+*
+* OUTPUT:
+*       See description.
+*
+* RETURN:
+*       None.
+*
+*******************************************************************************/
+static void eth_port_init (ETH_PORT_INFO * p_eth_port_ctrl)
+{
+	int queue;
+	ETH_WIN_PARAM win_param;
+
+	p_eth_port_ctrl->port_config = PORT_CONFIG_VALUE;
+	p_eth_port_ctrl->port_config_extend = PORT_CONFIG_EXTEND_VALUE;
+	p_eth_port_ctrl->port_sdma_config = PORT_SDMA_CONFIG_VALUE;
+	p_eth_port_ctrl->port_serial_control = PORT_SERIAL_CONTROL_VALUE;
+
+	p_eth_port_ctrl->port_rx_queue_command = 0;
+	p_eth_port_ctrl->port_tx_queue_command = 0;
+
+	/* Zero out SW structs */
+	for (queue = 0; queue < MAX_RX_QUEUE_NUM; queue++) {
+		CURR_RFD_SET ((ETH_RX_DESC *) 0x00000000, queue);
+		USED_RFD_SET ((ETH_RX_DESC *) 0x00000000, queue);
+		p_eth_port_ctrl->rx_resource_err[queue] = false;
+	}
+
+	for (queue = 0; queue < MAX_TX_QUEUE_NUM; queue++) {
+		CURR_TFD_SET ((ETH_TX_DESC *) 0x00000000, queue);
+		USED_TFD_SET ((ETH_TX_DESC *) 0x00000000, queue);
+		FIRST_TFD_SET ((ETH_TX_DESC *) 0x00000000, queue);
+		p_eth_port_ctrl->tx_resource_err[queue] = false;
+	}
+
+	eth_port_reset (p_eth_port_ctrl->port_num);
+
+	/* Set access parameters for DRAM bank 0 */
+	win_param.win = ETH_WIN0;	/* Use Ethernet window 0 */
+	win_param.target = ETH_TARGET_DRAM;	/* Window target - DDR  */
+	win_param.attributes = EBAR_ATTR_DRAM_CS0;	/* Enable DRAM bank   */
+#ifndef CONFIG_NOT_COHERENT_CACHE
+	win_param.attributes |= EBAR_ATTR_DRAM_CACHE_COHERENCY_WB;
+#endif
+	win_param.high_addr = 0;
+	/* Get bank base */
+	win_param.base_addr = mv_get_dram_bank_base_addr (BANK0);
+	win_param.size = mv_get_dram_bank_size (BANK0);	/* Get bank size */
+	if (win_param.size == 0)
+		win_param.enable = 0;
+	else
+		win_param.enable = 1;	/* Enable the access */
+	win_param.access_ctrl = EWIN_ACCESS_FULL;	/* Enable full access */
+
+	/* Set the access control for address window (EPAPR) READ & WRITE */
+	eth_set_access_control (p_eth_port_ctrl->port_num, &win_param);
+
+	/* Set access parameters for DRAM bank 1 */
+	win_param.win = ETH_WIN1;	/* Use Ethernet window 1 */
+	win_param.target = ETH_TARGET_DRAM;	/* Window target - DDR */
+	win_param.attributes = EBAR_ATTR_DRAM_CS1;	/* Enable DRAM bank */
+#ifndef CONFIG_NOT_COHERENT_CACHE
+	win_param.attributes |= EBAR_ATTR_DRAM_CACHE_COHERENCY_WB;
+#endif
+	win_param.high_addr = 0;
+	/* Get bank base */
+	win_param.base_addr = mv_get_dram_bank_base_addr (BANK1);
+	win_param.size = mv_get_dram_bank_size (BANK1);	/* Get bank size */
+	if (win_param.size == 0)
+		win_param.enable = 0;
+	else
+		win_param.enable = 1;	/* Enable the access */
+	win_param.access_ctrl = EWIN_ACCESS_FULL;	/* Enable full access */
+
+	/* Set the access control for address window (EPAPR) READ & WRITE */
+	eth_set_access_control (p_eth_port_ctrl->port_num, &win_param);
+
+	/* Set access parameters for DRAM bank 2 */
+	win_param.win = ETH_WIN2;	/* Use Ethernet window 2 */
+	win_param.target = ETH_TARGET_DRAM;	/* Window target - DDR */
+	win_param.attributes = EBAR_ATTR_DRAM_CS2;	/* Enable DRAM bank */
+#ifndef CONFIG_NOT_COHERENT_CACHE
+	win_param.attributes |= EBAR_ATTR_DRAM_CACHE_COHERENCY_WB;
+#endif
+	win_param.high_addr = 0;
+	/* Get bank base */
+	win_param.base_addr = mv_get_dram_bank_base_addr (BANK2);
+	win_param.size = mv_get_dram_bank_size (BANK2);	/* Get bank size */
+	if (win_param.size == 0)
+		win_param.enable = 0;
+	else
+		win_param.enable = 1;	/* Enable the access */
+	win_param.access_ctrl = EWIN_ACCESS_FULL;	/* Enable full access */
+
+	/* Set the access control for address window (EPAPR) READ & WRITE */
+	eth_set_access_control (p_eth_port_ctrl->port_num, &win_param);
+
+	/* Set access parameters for DRAM bank 3 */
+	win_param.win = ETH_WIN3;	/* Use Ethernet window 3 */
+	win_param.target = ETH_TARGET_DRAM;	/* Window target - DDR */
+	win_param.attributes = EBAR_ATTR_DRAM_CS3;	/* Enable DRAM bank */
+#ifndef CONFIG_NOT_COHERENT_CACHE
+	win_param.attributes |= EBAR_ATTR_DRAM_CACHE_COHERENCY_WB;
+#endif
+	win_param.high_addr = 0;
+	/* Get bank base */
+	win_param.base_addr = mv_get_dram_bank_base_addr (BANK3);
+	win_param.size = mv_get_dram_bank_size (BANK3);	/* Get bank size */
+	if (win_param.size == 0)
+		win_param.enable = 0;
+	else
+		win_param.enable = 1;	/* Enable the access */
+	win_param.access_ctrl = EWIN_ACCESS_FULL;	/* Enable full access */
+
+	/* Set the access control for address window (EPAPR) READ & WRITE */
+	eth_set_access_control (p_eth_port_ctrl->port_num, &win_param);
+
+	/* Set access parameters for Internal SRAM */
+	win_param.win = ETH_WIN4;	/* Use Ethernet window 0 */
+	win_param.target = EBAR_TARGET_CBS;	/* Target - Internal SRAM */
+	win_param.attributes = EBAR_ATTR_CBS_SRAM | EBAR_ATTR_CBS_SRAM_BLOCK0;
+	win_param.high_addr = 0;
+	win_param.base_addr = mv_get_internal_sram_base ();	/* Get base addr */
+	win_param.size = MV64460_INTERNAL_SRAM_SIZE;	/* Get bank size */
+	win_param.enable = 1;	/* Enable the access */
+	win_param.access_ctrl = EWIN_ACCESS_FULL;	/* Enable full access */
+
+	/* Set the access control for address window (EPAPR) READ & WRITE */
+	eth_set_access_control (p_eth_port_ctrl->port_num, &win_param);
+
+	eth_port_init_mac_tables (p_eth_port_ctrl->port_num);
+
+	ethernet_phy_set (p_eth_port_ctrl->port_num,
+			  p_eth_port_ctrl->port_phy_addr);
+
+	return;
+
+}
+
+/*******************************************************************************
+* eth_port_start - Start the Ethernet port activity.
+*
+* DESCRIPTION:
+*       This routine prepares the Ethernet port for Rx and Tx activity:
+*       1. Initialize Tx and Rx Current Descriptor Pointer for each queue that
+*           has been initialized a descriptor's ring (using ether_init_tx_desc_ring
+*           for Tx and ether_init_rx_desc_ring for Rx)
+*       2. Initialize and enable the Ethernet configuration port by writing to
+*           the port's configuration and command registers.
+*       3. Initialize and enable the SDMA by writing to the SDMA's
+*    configuration and command registers.
+*       After completing these steps, the ethernet port SDMA can starts to
+*       perform Rx and Tx activities.
+*
+*       Note: Each Rx and Tx queue descriptor's list must be initialized prior
+*       to calling this function (use ether_init_tx_desc_ring for Tx queues and
+*       ether_init_rx_desc_ring for Rx queues).
+*
+* INPUT:
+*       ETH_PORT_INFO 	*p_eth_port_ctrl       Ethernet port control struct
+*
+* OUTPUT:
+*       Ethernet port is ready to receive and transmit.
+*
+* RETURN:
+*       false if the port PHY is not up.
+*       true otherwise.
+*
+*******************************************************************************/
+static bool eth_port_start (ETH_PORT_INFO * p_eth_port_ctrl)
+{
+	int queue;
+	volatile ETH_TX_DESC *p_tx_curr_desc;
+	volatile ETH_RX_DESC *p_rx_curr_desc;
+	unsigned int phy_reg_data;
+	ETH_PORT eth_port_num = p_eth_port_ctrl->port_num;
+
+
+	/* Assignment of Tx CTRP of given queue */
+	for (queue = 0; queue < MAX_TX_QUEUE_NUM; queue++) {
+		CURR_TFD_GET (p_tx_curr_desc, queue);
+		MV_REG_WRITE ((MV64460_ETH_TX_CURRENT_QUEUE_DESC_PTR_0
+			       (eth_port_num)
+			       + (4 * queue)),
+			      ((unsigned int) p_tx_curr_desc));
+
+	}
+
+	/* Assignment of Rx CRDP of given queue */
+	for (queue = 0; queue < MAX_RX_QUEUE_NUM; queue++) {
+		CURR_RFD_GET (p_rx_curr_desc, queue);
+		MV_REG_WRITE ((MV64460_ETH_RX_CURRENT_QUEUE_DESC_PTR_0
+			       (eth_port_num)
+			       + (4 * queue)),
+			      ((unsigned int) p_rx_curr_desc));
+
+		if (p_rx_curr_desc != NULL)
+			/* Add the assigned Ethernet address to the port's address table */
+			eth_port_uc_addr_set (p_eth_port_ctrl->port_num,
+					      p_eth_port_ctrl->port_mac_addr,
+					      queue);
+	}
+
+	/* Assign port configuration and command. */
+	MV_REG_WRITE (MV64460_ETH_PORT_CONFIG_REG (eth_port_num),
+		      p_eth_port_ctrl->port_config);
+
+	MV_REG_WRITE (MV64460_ETH_PORT_CONFIG_EXTEND_REG (eth_port_num),
+		      p_eth_port_ctrl->port_config_extend);
+
+	MV_REG_WRITE (MV64460_ETH_PORT_SERIAL_CONTROL_REG (eth_port_num),
+		      p_eth_port_ctrl->port_serial_control);
+
+	MV_SET_REG_BITS (MV64460_ETH_PORT_SERIAL_CONTROL_REG (eth_port_num),
+			 ETH_SERIAL_PORT_ENABLE);
+
+	/* Assign port SDMA configuration */
+	MV_REG_WRITE (MV64460_ETH_SDMA_CONFIG_REG (eth_port_num),
+		      p_eth_port_ctrl->port_sdma_config);
+
+	MV_REG_WRITE (MV64460_ETH_TX_QUEUE_0_TOKEN_BUCKET_COUNT
+		      (eth_port_num), 0x3fffffff);
+	MV_REG_WRITE (MV64460_ETH_TX_QUEUE_0_TOKEN_BUCKET_CONFIG
+		      (eth_port_num), 0x03fffcff);
+	/* Turn off the port/queue bandwidth limitation */
+	MV_REG_WRITE (MV64460_ETH_MAXIMUM_TRANSMIT_UNIT (eth_port_num), 0x0);
+
+	/* Enable port Rx. */
+	MV_REG_WRITE (MV64460_ETH_RECEIVE_QUEUE_COMMAND_REG (eth_port_num),
+		      p_eth_port_ctrl->port_rx_queue_command);
+
+	/* Check if link is up */
+	eth_port_read_smi_reg (eth_port_num, 1, &phy_reg_data);
+
+	if (!(phy_reg_data & 0x20))
+		return false;
+
+	return true;
+}
+
+/*******************************************************************************
+* eth_port_uc_addr_set - This function Set the port Unicast address.
+*
+* DESCRIPTION:
+*		This function Set the port Ethernet MAC address.
+*
+* INPUT:
+*	ETH_PORT eth_port_num     Port number.
+*	char *        p_addr		Address to be set
+*	ETH_QUEUE 	  queue		Rx queue number for this MAC address.
+*
+* OUTPUT:
+*	Set MAC address low and high registers. also calls eth_port_uc_addr()
+*       To set the unicast table with the proper information.
+*
+* RETURN:
+*	N/A.
+*
+*******************************************************************************/
+static void eth_port_uc_addr_set (ETH_PORT eth_port_num,
+				  unsigned char *p_addr, ETH_QUEUE queue)
+{
+	unsigned int mac_h;
+	unsigned int mac_l;
+
+	mac_l = (p_addr[4] << 8) | (p_addr[5]);
+	mac_h = (p_addr[0] << 24) | (p_addr[1] << 16) |
+		(p_addr[2] << 8) | (p_addr[3] << 0);
+
+	MV_REG_WRITE (MV64460_ETH_MAC_ADDR_LOW (eth_port_num), mac_l);
+	MV_REG_WRITE (MV64460_ETH_MAC_ADDR_HIGH (eth_port_num), mac_h);
+
+	/* Accept frames of this address */
+	eth_port_uc_addr (eth_port_num, p_addr[5], queue, ACCEPT_MAC_ADDR);
+
+	return;
+}
+
+/*******************************************************************************
+* eth_port_uc_addr - This function Set the port unicast address table
+*
+* DESCRIPTION:
+*	This function locates the proper entry in the Unicast table for the
+*	specified MAC nibble and sets its properties according to function
+*	parameters.
+*
+* INPUT:
+*	ETH_PORT 	eth_port_num      Port number.
+*	unsigned char uc_nibble		Unicast MAC Address last nibble.
+*	ETH_QUEUE 		 queue		Rx queue number for this MAC address.
+*	int 			option      0 = Add, 1 = remove address.
+*
+* OUTPUT:
+*	This function add/removes MAC addresses from the port unicast address
+*	table.
+*
+* RETURN:
+*	true is output succeeded.
+*	false if option parameter is invalid.
+*
+*******************************************************************************/
+static bool eth_port_uc_addr (ETH_PORT eth_port_num,
+			      unsigned char uc_nibble,
+			      ETH_QUEUE queue, int option)
+{
+	unsigned int unicast_reg;
+	unsigned int tbl_offset;
+	unsigned int reg_offset;
+
+	/* Locate the Unicast table entry */
+	uc_nibble = (0xf & uc_nibble);
+	tbl_offset = (uc_nibble / 4) * 4;	/* Register offset from unicast table base */
+	reg_offset = uc_nibble % 4;	/* Entry offset within the above register */
+
+	switch (option) {
+	case REJECT_MAC_ADDR:
+		/* Clear accepts frame bit at specified unicast DA table entry */
+		unicast_reg =
+			MV_REG_READ ((MV64460_ETH_DA_FILTER_UNICAST_TABLE_BASE
+				      (eth_port_num)
+				      + tbl_offset));
+
+		unicast_reg &= (0x0E << (8 * reg_offset));
+
+		MV_REG_WRITE ((MV64460_ETH_DA_FILTER_UNICAST_TABLE_BASE
+			       (eth_port_num)
+			       + tbl_offset), unicast_reg);
+		break;
+
+	case ACCEPT_MAC_ADDR:
+		/* Set accepts frame bit at unicast DA filter table entry */
+		unicast_reg =
+			MV_REG_READ ((MV64460_ETH_DA_FILTER_UNICAST_TABLE_BASE
+				      (eth_port_num)
+				      + tbl_offset));
+
+		unicast_reg |= ((0x01 | queue) << (8 * reg_offset));
+
+		MV_REG_WRITE ((MV64460_ETH_DA_FILTER_UNICAST_TABLE_BASE
+			       (eth_port_num)
+			       + tbl_offset), unicast_reg);
+
+		break;
+
+	default:
+		return false;
+	}
+	return true;
+}
+
+#if 0				/* FIXME */
+/*******************************************************************************
+* eth_port_mc_addr - Multicast address settings.
+*
+* DESCRIPTION:
+*	This API controls the MV device MAC multicast support.
+*	The MV device supports multicast using two tables:
+*	1) Special Multicast Table for MAC addresses of the form
+*	   0x01-00-5E-00-00-XX (where XX is between 0x00 and 0x_fF).
+*	   The MAC DA[7:0] bits are used as a pointer to the Special Multicast
+*	   Table entries in the DA-Filter table.
+*	   In this case, the function calls eth_port_smc_addr() routine to set the
+*	   Special Multicast Table.
+*	2) Other Multicast Table for multicast of another type. A CRC-8bit
+*	   is used as an index to the Other Multicast Table entries in the
+*	   DA-Filter table.
+*	   In this case, the function calculates the CRC-8bit value and calls
+*	   eth_port_omc_addr() routine to set the Other Multicast Table.
+* INPUT:
+*	ETH_PORT 	eth_port_num      Port number.
+*	unsigned char 	*p_addr		Unicast MAC Address.
+*	ETH_QUEUE 		 queue		Rx queue number for this MAC address.
+*	int 			option      0 = Add, 1 = remove address.
+*
+* OUTPUT:
+*	See description.
+*
+* RETURN:
+*	true is output succeeded.
+*	false if add_address_table_entry( ) failed.
+*
+*******************************************************************************/
+static void eth_port_mc_addr (ETH_PORT eth_port_num,
+			      unsigned char *p_addr,
+			      ETH_QUEUE queue, int option)
+{
+	unsigned int mac_h;
+	unsigned int mac_l;
+	unsigned char crc_result = 0;
+	int mac_array[48];
+	int crc[8];
+	int i;
+
+
+	if ((p_addr[0] == 0x01) &&
+	    (p_addr[1] == 0x00) &&
+	    (p_addr[2] == 0x5E) && (p_addr[3] == 0x00) && (p_addr[4] == 0x00))
+
+		eth_port_smc_addr (eth_port_num, p_addr[5], queue, option);
+	else {
+		/* Calculate CRC-8 out of the given address */
+		mac_h = (p_addr[0] << 8) | (p_addr[1]);
+		mac_l = (p_addr[2] << 24) | (p_addr[3] << 16) |
+			(p_addr[4] << 8) | (p_addr[5] << 0);
+
+		for (i = 0; i < 32; i++)
+			mac_array[i] = (mac_l >> i) & 0x1;
+		for (i = 32; i < 48; i++)
+			mac_array[i] = (mac_h >> (i - 32)) & 0x1;
+
+
+		crc[0] = mac_array[45] ^ mac_array[43] ^ mac_array[40] ^
+			mac_array[39] ^ mac_array[35] ^ mac_array[34] ^
+			mac_array[31] ^ mac_array[30] ^ mac_array[28] ^
+			mac_array[23] ^ mac_array[21] ^ mac_array[19] ^
+			mac_array[18] ^ mac_array[16] ^ mac_array[14] ^
+			mac_array[12] ^ mac_array[8] ^ mac_array[7] ^
+			mac_array[6] ^ mac_array[0];
+
+		crc[1] = mac_array[46] ^ mac_array[45] ^ mac_array[44] ^
+			mac_array[43] ^ mac_array[41] ^ mac_array[39] ^
+			mac_array[36] ^ mac_array[34] ^ mac_array[32] ^
+			mac_array[30] ^ mac_array[29] ^ mac_array[28] ^
+			mac_array[24] ^ mac_array[23] ^ mac_array[22] ^
+			mac_array[21] ^ mac_array[20] ^ mac_array[18] ^
+			mac_array[17] ^ mac_array[16] ^ mac_array[15] ^
+			mac_array[14] ^ mac_array[13] ^ mac_array[12] ^
+			mac_array[9] ^ mac_array[6] ^ mac_array[1] ^
+			mac_array[0];
+
+		crc[2] = mac_array[47] ^ mac_array[46] ^ mac_array[44] ^
+			mac_array[43] ^ mac_array[42] ^ mac_array[39] ^
+			mac_array[37] ^ mac_array[34] ^ mac_array[33] ^
+			mac_array[29] ^ mac_array[28] ^ mac_array[25] ^
+			mac_array[24] ^ mac_array[22] ^ mac_array[17] ^
+			mac_array[15] ^ mac_array[13] ^ mac_array[12] ^
+			mac_array[10] ^ mac_array[8] ^ mac_array[6] ^
+			mac_array[2] ^ mac_array[1] ^ mac_array[0];
+
+		crc[3] = mac_array[47] ^ mac_array[45] ^ mac_array[44] ^
+			mac_array[43] ^ mac_array[40] ^ mac_array[38] ^
+			mac_array[35] ^ mac_array[34] ^ mac_array[30] ^
+			mac_array[29] ^ mac_array[26] ^ mac_array[25] ^
+			mac_array[23] ^ mac_array[18] ^ mac_array[16] ^
+			mac_array[14] ^ mac_array[13] ^ mac_array[11] ^
+			mac_array[9] ^ mac_array[7] ^ mac_array[3] ^
+			mac_array[2] ^ mac_array[1];
+
+		crc[4] = mac_array[46] ^ mac_array[45] ^ mac_array[44] ^
+			mac_array[41] ^ mac_array[39] ^ mac_array[36] ^
+			mac_array[35] ^ mac_array[31] ^ mac_array[30] ^
+			mac_array[27] ^ mac_array[26] ^ mac_array[24] ^
+			mac_array[19] ^ mac_array[17] ^ mac_array[15] ^
+			mac_array[14] ^ mac_array[12] ^ mac_array[10] ^
+			mac_array[8] ^ mac_array[4] ^ mac_array[3] ^
+			mac_array[2];
+
+		crc[5] = mac_array[47] ^ mac_array[46] ^ mac_array[45] ^
+			mac_array[42] ^ mac_array[40] ^ mac_array[37] ^
+			mac_array[36] ^ mac_array[32] ^ mac_array[31] ^
+			mac_array[28] ^ mac_array[27] ^ mac_array[25] ^
+			mac_array[20] ^ mac_array[18] ^ mac_array[16] ^
+			mac_array[15] ^ mac_array[13] ^ mac_array[11] ^
+			mac_array[9] ^ mac_array[5] ^ mac_array[4] ^
+			mac_array[3];
+
+		crc[6] = mac_array[47] ^ mac_array[46] ^ mac_array[43] ^
+			mac_array[41] ^ mac_array[38] ^ mac_array[37] ^
+			mac_array[33] ^ mac_array[32] ^ mac_array[29] ^
+			mac_array[28] ^ mac_array[26] ^ mac_array[21] ^
+			mac_array[19] ^ mac_array[17] ^ mac_array[16] ^
+			mac_array[14] ^ mac_array[12] ^ mac_array[10] ^
+			mac_array[6] ^ mac_array[5] ^ mac_array[4];
+
+		crc[7] = mac_array[47] ^ mac_array[44] ^ mac_array[42] ^
+			mac_array[39] ^ mac_array[38] ^ mac_array[34] ^
+			mac_array[33] ^ mac_array[30] ^ mac_array[29] ^
+			mac_array[27] ^ mac_array[22] ^ mac_array[20] ^
+			mac_array[18] ^ mac_array[17] ^ mac_array[15] ^
+			mac_array[13] ^ mac_array[11] ^ mac_array[7] ^
+			mac_array[6] ^ mac_array[5];
+
+		for (i = 0; i < 8; i++)
+			crc_result = crc_result | (crc[i] << i);
+
+		eth_port_omc_addr (eth_port_num, crc_result, queue, option);
+	}
+	return;
+}
+
+/*******************************************************************************
+* eth_port_smc_addr - Special Multicast address settings.
+*
+* DESCRIPTION:
+*	This routine controls the MV device special MAC multicast support.
+*	The Special Multicast Table for MAC addresses supports MAC of the form
+*	0x01-00-5E-00-00-XX (where XX is between 0x00 and 0x_fF).
+*	The MAC DA[7:0] bits are used as a pointer to the Special Multicast
+*	Table entries in the DA-Filter table.
+*	This function set the Special Multicast Table appropriate entry
+*	according to the argument given.
+*
+* INPUT:
+*	ETH_PORT 	eth_port_num      Port number.
+*	unsigned char 	mc_byte		Multicast addr last byte (MAC DA[7:0] bits).
+*	ETH_QUEUE 		 queue		Rx queue number for this MAC address.
+*	int 			option      0 = Add, 1 = remove address.
+*
+* OUTPUT:
+*	See description.
+*
+* RETURN:
+*	true is output succeeded.
+*	false if option parameter is invalid.
+*
+*******************************************************************************/
+static bool eth_port_smc_addr (ETH_PORT eth_port_num,
+			       unsigned char mc_byte,
+			       ETH_QUEUE queue, int option)
+{
+	unsigned int smc_table_reg;
+	unsigned int tbl_offset;
+	unsigned int reg_offset;
+
+	/* Locate the SMC table entry */
+	tbl_offset = (mc_byte / 4) * 4;	/* Register offset from SMC table base */
+	reg_offset = mc_byte % 4;	/* Entry offset within the above register */
+	queue &= 0x7;
+
+	switch (option) {
+	case REJECT_MAC_ADDR:
+		/* Clear accepts frame bit at specified Special DA table entry */
+		smc_table_reg =
+			MV_REG_READ ((MV64460_ETH_DA_FILTER_SPECIAL_MULTICAST_TABLE_BASE (eth_port_num) + tbl_offset));
+		smc_table_reg &= (0x0E << (8 * reg_offset));
+
+		MV_REG_WRITE ((MV64460_ETH_DA_FILTER_SPECIAL_MULTICAST_TABLE_BASE (eth_port_num) + tbl_offset), smc_table_reg);
+		break;
+
+	case ACCEPT_MAC_ADDR:
+		/* Set accepts frame bit at specified Special DA table entry */
+		smc_table_reg =
+			MV_REG_READ ((MV64460_ETH_DA_FILTER_SPECIAL_MULTICAST_TABLE_BASE (eth_port_num) + tbl_offset));
+		smc_table_reg |= ((0x01 | queue) << (8 * reg_offset));
+
+		MV_REG_WRITE ((MV64460_ETH_DA_FILTER_SPECIAL_MULTICAST_TABLE_BASE (eth_port_num) + tbl_offset), smc_table_reg);
+		break;
+
+	default:
+		return false;
+	}
+	return true;
+}
+
+/*******************************************************************************
+* eth_port_omc_addr - Multicast address settings.
+*
+* DESCRIPTION:
+*	This routine controls the MV device Other MAC multicast support.
+*	The Other Multicast Table is used for multicast of another type.
+*	A CRC-8bit is used as an index to the Other Multicast Table entries
+*	in the DA-Filter table.
+*	The function gets the CRC-8bit value from the calling routine and
+*      set the Other Multicast Table appropriate entry according to the
+*	CRC-8 argument given.
+*
+* INPUT:
+*	ETH_PORT 	eth_port_num      Port number.
+*	unsigned char 	  crc8		A CRC-8bit (Polynomial: x^8+x^2+x^1+1).
+*	ETH_QUEUE 		 queue		Rx queue number for this MAC address.
+*	int 			option      0 = Add, 1 = remove address.
+*
+* OUTPUT:
+*	See description.
+*
+* RETURN:
+*	true is output succeeded.
+*	false if option parameter is invalid.
+*
+*******************************************************************************/
+static bool eth_port_omc_addr (ETH_PORT eth_port_num,
+			       unsigned char crc8,
+			       ETH_QUEUE queue, int option)
+{
+	unsigned int omc_table_reg;
+	unsigned int tbl_offset;
+	unsigned int reg_offset;
+
+	/* Locate the OMC table entry */
+	tbl_offset = (crc8 / 4) * 4;	/* Register offset from OMC table base */
+	reg_offset = crc8 % 4;	/* Entry offset within the above register */
+	queue &= 0x7;
+
+	switch (option) {
+	case REJECT_MAC_ADDR:
+		/* Clear accepts frame bit at specified Other DA table entry */
+		omc_table_reg =
+			MV_REG_READ ((MV64460_ETH_DA_FILTER_OTHER_MULTICAST_TABLE_BASE (eth_port_num) + tbl_offset));
+		omc_table_reg &= (0x0E << (8 * reg_offset));
+
+		MV_REG_WRITE ((MV64460_ETH_DA_FILTER_OTHER_MULTICAST_TABLE_BASE (eth_port_num) + tbl_offset), omc_table_reg);
+		break;
+
+	case ACCEPT_MAC_ADDR:
+		/* Set accepts frame bit at specified Other DA table entry */
+		omc_table_reg =
+			MV_REG_READ ((MV64460_ETH_DA_FILTER_OTHER_MULTICAST_TABLE_BASE (eth_port_num) + tbl_offset));
+		omc_table_reg |= ((0x01 | queue) << (8 * reg_offset));
+
+		MV_REG_WRITE ((MV64460_ETH_DA_FILTER_OTHER_MULTICAST_TABLE_BASE (eth_port_num) + tbl_offset), omc_table_reg);
+		break;
+
+	default:
+		return false;
+	}
+	return true;
+}
+#endif
+
+/*******************************************************************************
+* eth_port_init_mac_tables - Clear all entrance in the UC, SMC and OMC tables
+*
+* DESCRIPTION:
+*       Go through all the DA filter tables (Unicast, Special Multicast & Other
+*       Multicast) and set each entry to 0.
+*
+* INPUT:
+*	ETH_PORT    eth_port_num   Ethernet Port number. See ETH_PORT enum.
+*
+* OUTPUT:
+*       Multicast and Unicast packets are rejected.
+*
+* RETURN:
+*       None.
+*
+*******************************************************************************/
+static void eth_port_init_mac_tables (ETH_PORT eth_port_num)
+{
+	int table_index;
+
+	/* Clear DA filter unicast table (Ex_dFUT) */
+	for (table_index = 0; table_index <= 0xC; table_index += 4)
+		MV_REG_WRITE ((MV64460_ETH_DA_FILTER_UNICAST_TABLE_BASE
+			       (eth_port_num) + table_index), 0);
+
+	for (table_index = 0; table_index <= 0xFC; table_index += 4) {
+		/* Clear DA filter special multicast table (Ex_dFSMT) */
+		MV_REG_WRITE ((MV64460_ETH_DA_FILTER_SPECIAL_MULTICAST_TABLE_BASE (eth_port_num) + table_index), 0);
+		/* Clear DA filter other multicast table (Ex_dFOMT) */
+		MV_REG_WRITE ((MV64460_ETH_DA_FILTER_OTHER_MULTICAST_TABLE_BASE (eth_port_num) + table_index), 0);
+	}
+}
+
+/*******************************************************************************
+* eth_clear_mib_counters - Clear all MIB counters
+*
+* DESCRIPTION:
+*       This function clears all MIB counters of a specific ethernet port.
+*       A read from the MIB counter will reset the counter.
+*
+* INPUT:
+*	ETH_PORT    eth_port_num   Ethernet Port number. See ETH_PORT enum.
+*
+* OUTPUT:
+*       After reading all MIB counters, the counters resets.
+*
+* RETURN:
+*       MIB counter value.
+*
+*******************************************************************************/
+static void eth_clear_mib_counters (ETH_PORT eth_port_num)
+{
+	int i;
+	unsigned int dummy;
+
+	/* Perform dummy reads from MIB counters */
+	for (i = ETH_MIB_GOOD_OCTETS_RECEIVED_LOW; i < ETH_MIB_LATE_COLLISION;
+	     i += 4)
+		dummy = MV_REG_READ ((MV64460_ETH_MIB_COUNTERS_BASE
+				      (eth_port_num) + i));
+
+	return;
+}
+
+/*******************************************************************************
+* eth_read_mib_counter - Read a MIB counter
+*
+* DESCRIPTION:
+*       This function reads a MIB counter of a specific ethernet port.
+*       NOTE - If read from ETH_MIB_GOOD_OCTETS_RECEIVED_LOW, then the
+*       following read must be from ETH_MIB_GOOD_OCTETS_RECEIVED_HIGH
+*       register. The same applies for ETH_MIB_GOOD_OCTETS_SENT_LOW and
+*       ETH_MIB_GOOD_OCTETS_SENT_HIGH
+*
+* INPUT:
+*	ETH_PORT    eth_port_num   Ethernet Port number. See ETH_PORT enum.
+*       unsigned int mib_offset   MIB counter offset (use ETH_MIB_... macros).
+*
+* OUTPUT:
+*       After reading the MIB counter, the counter resets.
+*
+* RETURN:
+*       MIB counter value.
+*
+*******************************************************************************/
+unsigned int eth_read_mib_counter (ETH_PORT eth_port_num,
+				   unsigned int mib_offset)
+{
+	return (MV_REG_READ (MV64460_ETH_MIB_COUNTERS_BASE (eth_port_num)
+			     + mib_offset));
+}
+
+/*******************************************************************************
+* ethernet_phy_set - Set the ethernet port PHY address.
+*
+* DESCRIPTION:
+*       This routine set the ethernet port PHY address according to given
+*       parameter.
+*
+* INPUT:
+*		ETH_PORT   eth_port_num   Ethernet Port number. See ETH_PORT enum.
+*
+* OUTPUT:
+*       Set PHY Address Register with given PHY address parameter.
+*
+* RETURN:
+*       None.
+*
+*******************************************************************************/
+static void ethernet_phy_set (ETH_PORT eth_port_num, int phy_addr)
+{
+	unsigned int reg_data;
+
+	reg_data = MV_REG_READ (MV64460_ETH_PHY_ADDR_REG);
+
+	reg_data &= ~(0x1F << (5 * eth_port_num));
+	reg_data |= (phy_addr << (5 * eth_port_num));
+
+	MV_REG_WRITE (MV64460_ETH_PHY_ADDR_REG, reg_data);
+
+	return;
+}
+
+/*******************************************************************************
+ * ethernet_phy_get - Get the ethernet port PHY address.
+ *
+ * DESCRIPTION:
+ *       This routine returns the given ethernet port PHY address.
+ *
+ * INPUT:
+ *		ETH_PORT   eth_port_num   Ethernet Port number. See ETH_PORT enum.
+ *
+ * OUTPUT:
+ *       None.
+ *
+ * RETURN:
+ *       PHY address.
+ *
+ *******************************************************************************/
+static int ethernet_phy_get (ETH_PORT eth_port_num)
+{
+	unsigned int reg_data;
+
+	reg_data = MV_REG_READ (MV64460_ETH_PHY_ADDR_REG);
+
+	return ((reg_data >> (5 * eth_port_num)) & 0x1f);
+}
+
+/*******************************************************************************
+ * ethernet_phy_reset - Reset Ethernet port PHY.
+ *
+ * DESCRIPTION:
+ *       This routine utilize the SMI interface to reset the ethernet port PHY.
+ *       The routine waits until the link is up again or link up is timeout.
+ *
+ * INPUT:
+ *	ETH_PORT   eth_port_num   Ethernet Port number. See ETH_PORT enum.
+ *
+ * OUTPUT:
+ *       The ethernet port PHY renew its link.
+ *
+ * RETURN:
+ *       None.
+ *
+*******************************************************************************/
+static bool ethernet_phy_reset (ETH_PORT eth_port_num)
+{
+	unsigned int time_out = 50;
+	unsigned int phy_reg_data;
+
+	/* Reset the PHY */
+	eth_port_read_smi_reg (eth_port_num, 0, &phy_reg_data);
+	phy_reg_data |= 0x8000;	/* Set bit 15 to reset the PHY */
+	eth_port_write_smi_reg (eth_port_num, 0, phy_reg_data);
+
+	/* Poll on the PHY LINK */
+	do {
+		eth_port_read_smi_reg (eth_port_num, 1, &phy_reg_data);
+
+		if (time_out-- == 0)
+			return false;
+	}
+	while (!(phy_reg_data & 0x20));
+
+	return true;
+}
+
+/*******************************************************************************
+ * eth_port_reset - Reset Ethernet port
+ *
+ * DESCRIPTION:
+ * 	This routine resets the chip by aborting any SDMA engine activity and
+ *      clearing the MIB counters. The Receiver and the Transmit unit are in
+ *      idle state after this command is performed and the port is disabled.
+ *
+ * INPUT:
+ *	ETH_PORT   eth_port_num   Ethernet Port number. See ETH_PORT enum.
+ *
+ * OUTPUT:
+ *       Channel activity is halted.
+ *
+ * RETURN:
+ *       None.
+ *
+ *******************************************************************************/
+static void eth_port_reset (ETH_PORT eth_port_num)
+{
+	unsigned int reg_data;
+
+	/* Stop Tx port activity. Check port Tx activity. */
+	reg_data =
+		MV_REG_READ (MV64460_ETH_TRANSMIT_QUEUE_COMMAND_REG
+			     (eth_port_num));
+
+	if (reg_data & 0xFF) {
+		/* Issue stop command for active channels only */
+		MV_REG_WRITE (MV64460_ETH_TRANSMIT_QUEUE_COMMAND_REG
+			      (eth_port_num), (reg_data << 8));
+
+		/* Wait for all Tx activity to terminate. */
+		do {
+			/* Check port cause register that all Tx queues are stopped */
+			reg_data =
+				MV_REG_READ
+				(MV64460_ETH_TRANSMIT_QUEUE_COMMAND_REG
+				 (eth_port_num));
+		}
+		while (reg_data & 0xFF);
+	}
+
+	/* Stop Rx port activity. Check port Rx activity. */
+	reg_data =
+		MV_REG_READ (MV64460_ETH_RECEIVE_QUEUE_COMMAND_REG
+			     (eth_port_num));
+
+	if (reg_data & 0xFF) {
+		/* Issue stop command for active channels only */
+		MV_REG_WRITE (MV64460_ETH_RECEIVE_QUEUE_COMMAND_REG
+			      (eth_port_num), (reg_data << 8));
+
+		/* Wait for all Rx activity to terminate. */
+		do {
+			/* Check port cause register that all Rx queues are stopped */
+			reg_data =
+				MV_REG_READ
+				(MV64460_ETH_RECEIVE_QUEUE_COMMAND_REG
+				 (eth_port_num));
+		}
+		while (reg_data & 0xFF);
+	}
+
+
+	/* Clear all MIB counters */
+	eth_clear_mib_counters (eth_port_num);
+
+	/* Reset the Enable bit in the Configuration Register */
+	reg_data =
+		MV_REG_READ (MV64460_ETH_PORT_SERIAL_CONTROL_REG
+			     (eth_port_num));
+	reg_data &= ~ETH_SERIAL_PORT_ENABLE;
+	MV_REG_WRITE (MV64460_ETH_PORT_SERIAL_CONTROL_REG (eth_port_num),
+		      reg_data);
+
+	return;
+}
+
+#if 0				/* Not needed here */
+/*******************************************************************************
+ * ethernet_set_config_reg - Set specified bits in configuration register.
+ *
+ * DESCRIPTION:
+ *       This function sets specified bits in the given ethernet
+ *       configuration register.
+ *
+ * INPUT:
+ *	ETH_PORT   eth_port_num   Ethernet Port number. See ETH_PORT enum.
+ *      unsigned int    value   32 bit value.
+ *
+ * OUTPUT:
+ *      The set bits in the value parameter are set in the configuration
+ *      register.
+ *
+ * RETURN:
+ *      None.
+ *
+ *******************************************************************************/
+static void ethernet_set_config_reg (ETH_PORT eth_port_num,
+				     unsigned int value)
+{
+	unsigned int eth_config_reg;
+
+	eth_config_reg =
+		MV_REG_READ (MV64460_ETH_PORT_CONFIG_REG (eth_port_num));
+	eth_config_reg |= value;
+	MV_REG_WRITE (MV64460_ETH_PORT_CONFIG_REG (eth_port_num),
+		      eth_config_reg);
+
+	return;
+}
+#endif
+
+#if 0				/* FIXME */
+/*******************************************************************************
+ * ethernet_reset_config_reg - Reset specified bits in configuration register.
+ *
+ * DESCRIPTION:
+ *       This function resets specified bits in the given Ethernet
+ *       configuration register.
+ *
+ * INPUT:
+ *	ETH_PORT   eth_port_num   Ethernet Port number. See ETH_PORT enum.
+ *      unsigned int    value   32 bit value.
+ *
+ * OUTPUT:
+ *      The set bits in the value parameter are reset in the configuration
+ *      register.
+ *
+ * RETURN:
+ *      None.
+ *
+ *******************************************************************************/
+static void ethernet_reset_config_reg (ETH_PORT eth_port_num,
+				       unsigned int value)
+{
+	unsigned int eth_config_reg;
+
+	eth_config_reg = MV_REG_READ (MV64460_ETH_PORT_CONFIG_EXTEND_REG
+				      (eth_port_num));
+	eth_config_reg &= ~value;
+	MV_REG_WRITE (MV64460_ETH_PORT_CONFIG_EXTEND_REG (eth_port_num),
+		      eth_config_reg);
+
+	return;
+}
+#endif
+
+#if 0				/* Not needed here */
+/*******************************************************************************
+ * ethernet_get_config_reg - Get the port configuration register
+ *
+ * DESCRIPTION:
+ *       This function returns the configuration register value of the given
+ *       ethernet port.
+ *
+ * INPUT:
+ *	ETH_PORT   eth_port_num   Ethernet Port number. See ETH_PORT enum.
+ *
+ * OUTPUT:
+ *       None.
+ *
+ * RETURN:
+ *       Port configuration register value.
+ *
+ *******************************************************************************/
+static unsigned int ethernet_get_config_reg (ETH_PORT eth_port_num)
+{
+	unsigned int eth_config_reg;
+
+	eth_config_reg = MV_REG_READ (MV64460_ETH_PORT_CONFIG_EXTEND_REG
+				      (eth_port_num));
+	return eth_config_reg;
+}
+
+#endif
+
+/*******************************************************************************
+ * eth_port_read_smi_reg - Read PHY registers
+ *
+ * DESCRIPTION:
+ *       This routine utilize the SMI interface to interact with the PHY in
+ *       order to perform PHY register read.
+ *
+ * INPUT:
+ *	ETH_PORT   eth_port_num   Ethernet Port number. See ETH_PORT enum.
+ *       unsigned int   phy_reg   PHY register address offset.
+ *       unsigned int   *value   Register value buffer.
+ *
+ * OUTPUT:
+ *       Write the value of a specified PHY register into given buffer.
+ *
+ * RETURN:
+ *       false if the PHY is busy or read data is not in valid state.
+ *       true otherwise.
+ *
+ *******************************************************************************/
+static bool eth_port_read_smi_reg (ETH_PORT eth_port_num,
+				   unsigned int phy_reg, unsigned int *value)
+{
+	unsigned int reg_value;
+	unsigned int time_out = PHY_BUSY_TIMEOUT;
+	int phy_addr;
+
+	phy_addr = ethernet_phy_get (eth_port_num);
+/*    printf("     Phy-Port %d has addess %d  \n",eth_port_num, phy_addr );*/
+
+	/* first check that it is not busy */
+	do {
+		reg_value = MV_REG_READ (MV64460_ETH_SMI_REG);
+		if (time_out-- == 0) {
+			return false;
+		}
+	}
+	while (reg_value & ETH_SMI_BUSY);
+
+	/* not busy */
+
+	MV_REG_WRITE (MV64460_ETH_SMI_REG,
+		      (phy_addr << 16) | (phy_reg << 21) |
+		      ETH_SMI_OPCODE_READ);
+
+	time_out = PHY_BUSY_TIMEOUT;	/* initialize the time out var again */
+
+	do {
+		reg_value = MV_REG_READ (MV64460_ETH_SMI_REG);
+		if (time_out-- == 0) {
+			return false;
+		}
+	}
+	while ((reg_value & ETH_SMI_READ_VALID) != ETH_SMI_READ_VALID);	/* Bit set equ operation done */
+
+	/* Wait for the data to update in the SMI register */
+#define PHY_UPDATE_TIMEOUT	10000
+	for (time_out = 0; time_out < PHY_UPDATE_TIMEOUT; time_out++);
+
+	reg_value = MV_REG_READ (MV64460_ETH_SMI_REG);
+
+	*value = reg_value & 0xffff;
+
+	return true;
+}
+
+/*******************************************************************************
+ * eth_port_write_smi_reg - Write to PHY registers
+ *
+ * DESCRIPTION:
+ *       This routine utilize the SMI interface to interact with the PHY in
+ *       order to perform writes to PHY registers.
+ *
+ * INPUT:
+ *	ETH_PORT   eth_port_num   Ethernet Port number. See ETH_PORT enum.
+ *      unsigned int   phy_reg   PHY register address offset.
+ *      unsigned int    value   Register value.
+ *
+ * OUTPUT:
+ *      Write the given value to the specified PHY register.
+ *
+ * RETURN:
+ *      false if the PHY is busy.
+ *      true otherwise.
+ *
+ *******************************************************************************/
+static bool eth_port_write_smi_reg (ETH_PORT eth_port_num,
+				    unsigned int phy_reg, unsigned int value)
+{
+	unsigned int reg_value;
+	unsigned int time_out = PHY_BUSY_TIMEOUT;
+	int phy_addr;
+
+	phy_addr = ethernet_phy_get (eth_port_num);
+
+	/* first check that it is not busy */
+	do {
+		reg_value = MV_REG_READ (MV64460_ETH_SMI_REG);
+		if (time_out-- == 0) {
+			return false;
+		}
+	}
+	while (reg_value & ETH_SMI_BUSY);
+
+	/* not busy */
+	MV_REG_WRITE (MV64460_ETH_SMI_REG,
+		      (phy_addr << 16) | (phy_reg << 21) |
+		      ETH_SMI_OPCODE_WRITE | (value & 0xffff));
+	return true;
+}
+
+/*******************************************************************************
+ * eth_set_access_control - Config address decode parameters for Ethernet unit
+ *
+ * DESCRIPTION:
+ *       This function configures the address decode parameters for the Gigabit
+ *       Ethernet Controller according the given parameters struct.
+ *
+ * INPUT:
+ *	ETH_PORT   eth_port_num   Ethernet Port number. See ETH_PORT enum.
+ *       ETH_WIN_PARAM  *param   Address decode parameter struct.
+ *
+ * OUTPUT:
+ *       An access window is opened using the given access parameters.
+ *
+ * RETURN:
+ *       None.
+ *
+ *******************************************************************************/
+static void eth_set_access_control (ETH_PORT eth_port_num,
+				    ETH_WIN_PARAM * param)
+{
+	unsigned int access_prot_reg;
+
+	/* Set access control register */
+	access_prot_reg = MV_REG_READ (MV64460_ETH_ACCESS_PROTECTION_REG
+				       (eth_port_num));
+	access_prot_reg &= (~(3 << (param->win * 2)));	/* clear window permission */
+	access_prot_reg |= (param->access_ctrl << (param->win * 2));
+	MV_REG_WRITE (MV64460_ETH_ACCESS_PROTECTION_REG (eth_port_num),
+		      access_prot_reg);
+
+	/* Set window Size reg (SR) */
+	MV_REG_WRITE ((MV64460_ETH_SIZE_REG_0 +
+		       (ETH_SIZE_REG_GAP * param->win)),
+		      (((param->size / 0x10000) - 1) << 16));
+
+	/* Set window Base address reg (BA) */
+	MV_REG_WRITE ((MV64460_ETH_BAR_0 + (ETH_BAR_GAP * param->win)),
+		      (param->target | param->attributes | param->base_addr));
+	/* High address remap reg (HARR) */
+	if (param->win < 4)
+		MV_REG_WRITE ((MV64460_ETH_HIGH_ADDR_REMAP_REG_0 +
+			       (ETH_HIGH_ADDR_REMAP_REG_GAP * param->win)),
+			      param->high_addr);
+
+	/* Base address enable reg (BARER) */
+	if (param->enable == 1)
+		MV_RESET_REG_BITS (MV64460_ETH_BASE_ADDR_ENABLE_REG,
+				   (1 << param->win));
+	else
+		MV_SET_REG_BITS (MV64460_ETH_BASE_ADDR_ENABLE_REG,
+				 (1 << param->win));
+}
+
+/*******************************************************************************
+ * ether_init_rx_desc_ring - Curve a Rx chain desc list and buffer in memory.
+ *
+ * DESCRIPTION:
+ *       This function prepares a Rx chained list of descriptors and packet
+ *       buffers in a form of a ring. The routine must be called after port
+ *       initialization routine and before port start routine.
+ *       The Ethernet SDMA engine uses CPU bus addresses to access the various
+ *       devices in the system (i.e. DRAM). This function uses the ethernet
+ *       struct 'virtual to physical' routine (set by the user) to set the ring
+ *       with physical addresses.
+ *
+ * INPUT:
+ *	ETH_PORT_INFO   *p_eth_port_ctrl   Ethernet Port Control srtuct.
+ *	ETH_QUEUE   	rx_queue         Number of Rx queue.
+ *      int 			rx_desc_num       Number of Rx descriptors
+ *      int 			rx_buff_size      Size of Rx buffer
+ *      unsigned int    rx_desc_base_addr  Rx descriptors memory area base addr.
+ *      unsigned int    rx_buff_base_addr  Rx buffer memory area base addr.
+ *
+ * OUTPUT:
+ *      The routine updates the Ethernet port control struct with information
+ *      regarding the Rx descriptors and buffers.
+ *
+ * RETURN:
+ *      false if the given descriptors memory area is not aligned according to
+ *      Ethernet SDMA specifications.
+ *      true otherwise.
+ *
+ *******************************************************************************/
+static bool ether_init_rx_desc_ring (ETH_PORT_INFO * p_eth_port_ctrl,
+				     ETH_QUEUE rx_queue,
+				     int rx_desc_num,
+				     int rx_buff_size,
+				     unsigned int rx_desc_base_addr,
+				     unsigned int rx_buff_base_addr)
+{
+	ETH_RX_DESC *p_rx_desc;
+	ETH_RX_DESC *p_rx_prev_desc;	/* pointer to link with the last descriptor */
+	unsigned int buffer_addr;
+	int ix;			/* a counter */
+
+
+	p_rx_desc = (ETH_RX_DESC *) rx_desc_base_addr;
+	p_rx_prev_desc = p_rx_desc;
+	buffer_addr = rx_buff_base_addr;
+
+	/* Rx desc Must be 4LW aligned (i.e. Descriptor_Address[3:0]=0000). */
+	if (rx_buff_base_addr & 0xF)
+		return false;
+
+	/* Rx buffers are limited to 64K bytes and Minimum size is 8 bytes  */
+	if ((rx_buff_size < 8) || (rx_buff_size > RX_BUFFER_MAX_SIZE))
+		return false;
+
+	/* Rx buffers must be 64-bit aligned.       */
+	if ((rx_buff_base_addr + rx_buff_size) & 0x7)
+		return false;
+
+	/* initialize the Rx descriptors ring */
+	for (ix = 0; ix < rx_desc_num; ix++) {
+		p_rx_desc->buf_size = rx_buff_size;
+		p_rx_desc->byte_cnt = 0x0000;
+		p_rx_desc->cmd_sts =
+			ETH_BUFFER_OWNED_BY_DMA | ETH_RX_ENABLE_INTERRUPT;
+		p_rx_desc->next_desc_ptr =
+			((unsigned int) p_rx_desc) + RX_DESC_ALIGNED_SIZE;
+		p_rx_desc->buf_ptr = buffer_addr;
+		p_rx_desc->return_info = 0x00000000;
+		D_CACHE_FLUSH_LINE (p_rx_desc, 0);
+		buffer_addr += rx_buff_size;
+		p_rx_prev_desc = p_rx_desc;
+		p_rx_desc = (ETH_RX_DESC *)
+			((unsigned int) p_rx_desc + RX_DESC_ALIGNED_SIZE);
+	}
+
+	/* Closing Rx descriptors ring */
+	p_rx_prev_desc->next_desc_ptr = (rx_desc_base_addr);
+	D_CACHE_FLUSH_LINE (p_rx_prev_desc, 0);
+
+	/* Save Rx desc pointer to driver struct. */
+	CURR_RFD_SET ((ETH_RX_DESC *) rx_desc_base_addr, rx_queue);
+	USED_RFD_SET ((ETH_RX_DESC *) rx_desc_base_addr, rx_queue);
+
+	p_eth_port_ctrl->p_rx_desc_area_base[rx_queue] =
+		(ETH_RX_DESC *) rx_desc_base_addr;
+	p_eth_port_ctrl->rx_desc_area_size[rx_queue] =
+		rx_desc_num * RX_DESC_ALIGNED_SIZE;
+
+	p_eth_port_ctrl->port_rx_queue_command |= (1 << rx_queue);
+
+	return true;
+}
+
+/*******************************************************************************
+ * ether_init_tx_desc_ring - Curve a Tx chain desc list and buffer in memory.
+ *
+ * DESCRIPTION:
+ *       This function prepares a Tx chained list of descriptors and packet
+ *       buffers in a form of a ring. The routine must be called after port
+ *       initialization routine and before port start routine.
+ *       The Ethernet SDMA engine uses CPU bus addresses to access the various
+ *       devices in the system (i.e. DRAM). This function uses the ethernet
+ *       struct 'virtual to physical' routine (set by the user) to set the ring
+ *       with physical addresses.
+ *
+ * INPUT:
+ *	ETH_PORT_INFO   *p_eth_port_ctrl   Ethernet Port Control srtuct.
+ *	ETH_QUEUE   	tx_queue         Number of Tx queue.
+ *      int 			tx_desc_num       Number of Tx descriptors
+ *      int 			tx_buff_size      Size of Tx buffer
+ *      unsigned int    tx_desc_base_addr  Tx descriptors memory area base addr.
+ *      unsigned int    tx_buff_base_addr  Tx buffer memory area base addr.
+ *
+ * OUTPUT:
+ *      The routine updates the Ethernet port control struct with information
+ *      regarding the Tx descriptors and buffers.
+ *
+ * RETURN:
+ *      false if the given descriptors memory area is not aligned according to
+ *      Ethernet SDMA specifications.
+ *      true otherwise.
+ *
+ *******************************************************************************/
+static bool ether_init_tx_desc_ring (ETH_PORT_INFO * p_eth_port_ctrl,
+				     ETH_QUEUE tx_queue,
+				     int tx_desc_num,
+				     int tx_buff_size,
+				     unsigned int tx_desc_base_addr,
+				     unsigned int tx_buff_base_addr)
+{
+
+	ETH_TX_DESC *p_tx_desc;
+	ETH_TX_DESC *p_tx_prev_desc;
+	unsigned int buffer_addr;
+	int ix;			/* a counter */
+
+
+	/* save the first desc pointer to link with the last descriptor */
+	p_tx_desc = (ETH_TX_DESC *) tx_desc_base_addr;
+	p_tx_prev_desc = p_tx_desc;
+	buffer_addr = tx_buff_base_addr;
+
+	/* Tx desc Must be 4LW aligned (i.e. Descriptor_Address[3:0]=0000). */
+	if (tx_buff_base_addr & 0xF)
+		return false;
+
+	/* Tx buffers are limited to 64K bytes and Minimum size is 8 bytes  */
+	if ((tx_buff_size > TX_BUFFER_MAX_SIZE)
+	    || (tx_buff_size < TX_BUFFER_MIN_SIZE))
+		return false;
+
+	/* Initialize the Tx descriptors ring */
+	for (ix = 0; ix < tx_desc_num; ix++) {
+		p_tx_desc->byte_cnt = 0x0000;
+		p_tx_desc->l4i_chk = 0x0000;
+		p_tx_desc->cmd_sts = 0x00000000;
+		p_tx_desc->next_desc_ptr =
+			((unsigned int) p_tx_desc) + TX_DESC_ALIGNED_SIZE;
+
+		p_tx_desc->buf_ptr = buffer_addr;
+		p_tx_desc->return_info = 0x00000000;
+		D_CACHE_FLUSH_LINE (p_tx_desc, 0);
+		buffer_addr += tx_buff_size;
+		p_tx_prev_desc = p_tx_desc;
+		p_tx_desc = (ETH_TX_DESC *)
+			((unsigned int) p_tx_desc + TX_DESC_ALIGNED_SIZE);
+
+	}
+	/* Closing Tx descriptors ring */
+	p_tx_prev_desc->next_desc_ptr = tx_desc_base_addr;
+	D_CACHE_FLUSH_LINE (p_tx_prev_desc, 0);
+	/* Set Tx desc pointer in driver struct. */
+	CURR_TFD_SET ((ETH_TX_DESC *) tx_desc_base_addr, tx_queue);
+	USED_TFD_SET ((ETH_TX_DESC *) tx_desc_base_addr, tx_queue);
+
+	/* Init Tx ring base and size parameters */
+	p_eth_port_ctrl->p_tx_desc_area_base[tx_queue] =
+		(ETH_TX_DESC *) tx_desc_base_addr;
+	p_eth_port_ctrl->tx_desc_area_size[tx_queue] =
+		(tx_desc_num * TX_DESC_ALIGNED_SIZE);
+
+	/* Add the queue to the list of Tx queues of this port */
+	p_eth_port_ctrl->port_tx_queue_command |= (1 << tx_queue);
+
+	return true;
+}
+
+/*******************************************************************************
+ * eth_port_send - Send an Ethernet packet
+ *
+ * DESCRIPTION:
+ *	This routine send a given packet described by p_pktinfo parameter. It
+ *      supports transmitting of a packet spaned over multiple buffers. The
+ *      routine updates 'curr' and 'first' indexes according to the packet
+ *      segment passed to the routine. In case the packet segment is first,
+ *      the 'first' index is update. In any case, the 'curr' index is updated.
+ *      If the routine get into Tx resource error it assigns 'curr' index as
+ *      'first'. This way the function can abort Tx process of multiple
+ *      descriptors per packet.
+ *
+ * INPUT:
+ *	ETH_PORT_INFO   *p_eth_port_ctrl   Ethernet Port Control srtuct.
+ *	ETH_QUEUE   	tx_queue         Number of Tx queue.
+ *	PKT_INFO        *p_pkt_info       User packet buffer.
+ *
+ * OUTPUT:
+ *	Tx ring 'curr' and 'first' indexes are updated.
+ *
+ * RETURN:
+ *      ETH_QUEUE_FULL in case of Tx resource error.
+ *	ETH_ERROR in case the routine can not access Tx desc ring.
+ *	ETH_QUEUE_LAST_RESOURCE if the routine uses the last Tx resource.
+ *      ETH_OK otherwise.
+ *
+ *******************************************************************************/
+static ETH_FUNC_RET_STATUS eth_port_send (ETH_PORT_INFO * p_eth_port_ctrl,
+					  ETH_QUEUE tx_queue,
+					  PKT_INFO * p_pkt_info)
+{
+	volatile ETH_TX_DESC *p_tx_desc_first;
+	volatile ETH_TX_DESC *p_tx_desc_curr;
+	volatile ETH_TX_DESC *p_tx_next_desc_curr;
+	volatile ETH_TX_DESC *p_tx_desc_used;
+	unsigned int command_status;
+
+	/* Do not process Tx ring in case of Tx ring resource error */
+	if (p_eth_port_ctrl->tx_resource_err[tx_queue] == true)
+		return ETH_QUEUE_FULL;
+
+	/* Get the Tx Desc ring indexes */
+	CURR_TFD_GET (p_tx_desc_curr, tx_queue);
+	USED_TFD_GET (p_tx_desc_used, tx_queue);
+
+	if (p_tx_desc_curr == NULL)
+		return ETH_ERROR;
+
+	/* The following parameters are used to save readings from memory */
+	p_tx_next_desc_curr = TX_NEXT_DESC_PTR (p_tx_desc_curr, tx_queue);
+	command_status = p_pkt_info->cmd_sts | ETH_ZERO_PADDING | ETH_GEN_CRC;
+
+	if (command_status & (ETH_TX_FIRST_DESC)) {
+		/* Update first desc */
+		FIRST_TFD_SET (p_tx_desc_curr, tx_queue);
+		p_tx_desc_first = p_tx_desc_curr;
+	} else {
+		FIRST_TFD_GET (p_tx_desc_first, tx_queue);
+		command_status |= ETH_BUFFER_OWNED_BY_DMA;
+	}
+
+	/* Buffers with a payload smaller than 8 bytes must be aligned to 64-bit */
+	/* boundary. We use the memory allocated for Tx descriptor. This memory  */
+	/* located in TX_BUF_OFFSET_IN_DESC offset within the Tx descriptor. */
+	if (p_pkt_info->byte_cnt <= 8) {
+		printf ("You have failed in the < 8 bytes errata - fixme\n");	/* RABEEH - TBD */
+		return ETH_ERROR;
+
+		p_tx_desc_curr->buf_ptr =
+			(unsigned int) p_tx_desc_curr + TX_BUF_OFFSET_IN_DESC;
+		eth_b_copy (p_pkt_info->buf_ptr, p_tx_desc_curr->buf_ptr,
+			    p_pkt_info->byte_cnt);
+	} else
+		p_tx_desc_curr->buf_ptr = p_pkt_info->buf_ptr;
+
+	p_tx_desc_curr->byte_cnt = p_pkt_info->byte_cnt;
+	p_tx_desc_curr->return_info = p_pkt_info->return_info;
+
+	if (p_pkt_info->cmd_sts & (ETH_TX_LAST_DESC)) {
+		/* Set last desc with DMA ownership and interrupt enable. */
+		p_tx_desc_curr->cmd_sts = command_status |
+			ETH_BUFFER_OWNED_BY_DMA | ETH_TX_ENABLE_INTERRUPT;
+
+		if (p_tx_desc_curr != p_tx_desc_first)
+			p_tx_desc_first->cmd_sts |= ETH_BUFFER_OWNED_BY_DMA;
+
+		/* Flush CPU pipe */
+
+		D_CACHE_FLUSH_LINE ((unsigned int) p_tx_desc_curr, 0);
+		D_CACHE_FLUSH_LINE ((unsigned int) p_tx_desc_first, 0);
+		CPU_PIPE_FLUSH;
+
+		/* Apply send command */
+		ETH_ENABLE_TX_QUEUE (tx_queue, p_eth_port_ctrl->port_num);
+
+		/* Finish Tx packet. Update first desc in case of Tx resource error */
+		p_tx_desc_first = p_tx_next_desc_curr;
+		FIRST_TFD_SET (p_tx_desc_first, tx_queue);
+
+	} else {
+		p_tx_desc_curr->cmd_sts = command_status;
+		D_CACHE_FLUSH_LINE ((unsigned int) p_tx_desc_curr, 0);
+	}
+
+	/* Check for ring index overlap in the Tx desc ring */
+	if (p_tx_next_desc_curr == p_tx_desc_used) {
+		/* Update the current descriptor */
+		CURR_TFD_SET (p_tx_desc_first, tx_queue);
+
+		p_eth_port_ctrl->tx_resource_err[tx_queue] = true;
+		return ETH_QUEUE_LAST_RESOURCE;
+	} else {
+		/* Update the current descriptor */
+		CURR_TFD_SET (p_tx_next_desc_curr, tx_queue);
+		return ETH_OK;
+	}
+}
+
+/*******************************************************************************
+ * eth_tx_return_desc - Free all used Tx descriptors
+ *
+ * DESCRIPTION:
+ *	This routine returns the transmitted packet information to the caller.
+ *      It uses the 'first' index to support Tx desc return in case a transmit
+ *      of a packet spanned over multiple buffer still in process.
+ *      In case the Tx queue was in "resource error" condition, where there are
+ *      no available Tx resources, the function resets the resource error flag.
+ *
+ * INPUT:
+ *	ETH_PORT_INFO   *p_eth_port_ctrl   Ethernet Port Control srtuct.
+ *	ETH_QUEUE   	tx_queue         Number of Tx queue.
+ *	PKT_INFO        *p_pkt_info       User packet buffer.
+ *
+ * OUTPUT:
+ *	Tx ring 'first' and 'used' indexes are updated.
+ *
+ * RETURN:
+ *	ETH_ERROR in case the routine can not access Tx desc ring.
+ *      ETH_RETRY in case there is transmission in process.
+ *	ETH_END_OF_JOB if the routine has nothing to release.
+ *      ETH_OK otherwise.
+ *
+ *******************************************************************************/
+static ETH_FUNC_RET_STATUS eth_tx_return_desc (ETH_PORT_INFO *
+					       p_eth_port_ctrl,
+					       ETH_QUEUE tx_queue,
+					       PKT_INFO * p_pkt_info)
+{
+	volatile ETH_TX_DESC *p_tx_desc_used = NULL;
+	volatile ETH_TX_DESC *p_tx_desc_first = NULL;
+	unsigned int command_status;
+
+
+	/* Get the Tx Desc ring indexes */
+	USED_TFD_GET (p_tx_desc_used, tx_queue);
+	FIRST_TFD_GET (p_tx_desc_first, tx_queue);
+
+
+	/* Sanity check */
+	if (p_tx_desc_used == NULL)
+		return ETH_ERROR;
+
+	command_status = p_tx_desc_used->cmd_sts;
+
+	/* Still transmitting... */
+	if (command_status & (ETH_BUFFER_OWNED_BY_DMA)) {
+		D_CACHE_FLUSH_LINE ((unsigned int) p_tx_desc_used, 0);
+		return ETH_RETRY;
+	}
+
+	/* Stop release. About to overlap the current available Tx descriptor */
+	if ((p_tx_desc_used == p_tx_desc_first) &&
+	    (p_eth_port_ctrl->tx_resource_err[tx_queue] == false)) {
+		D_CACHE_FLUSH_LINE ((unsigned int) p_tx_desc_used, 0);
+		return ETH_END_OF_JOB;
+	}
+
+	/* Pass the packet information to the caller */
+	p_pkt_info->cmd_sts = command_status;
+	p_pkt_info->return_info = p_tx_desc_used->return_info;
+	p_tx_desc_used->return_info = 0;
+
+	/* Update the next descriptor to release. */
+	USED_TFD_SET (TX_NEXT_DESC_PTR (p_tx_desc_used, tx_queue), tx_queue);
+
+	/* Any Tx return cancels the Tx resource error status */
+	if (p_eth_port_ctrl->tx_resource_err[tx_queue] == true)
+		p_eth_port_ctrl->tx_resource_err[tx_queue] = false;
+
+	D_CACHE_FLUSH_LINE ((unsigned int) p_tx_desc_used, 0);
+
+	return ETH_OK;
+
+}
+
+/*******************************************************************************
+ * eth_port_receive - Get received information from Rx ring.
+ *
+ * DESCRIPTION:
+ * 	This routine returns the received data to the caller. There is no
+ *	data copying during routine operation. All information is returned
+ *	using pointer to packet information struct passed from the caller.
+ *      If the routine exhausts	Rx ring resources then the resource error flag
+ *      is set.
+ *
+ * INPUT:
+ *	ETH_PORT_INFO   *p_eth_port_ctrl   Ethernet Port Control srtuct.
+ *	ETH_QUEUE   	rx_queue         Number of Rx queue.
+ *	PKT_INFO        *p_pkt_info       User packet buffer.
+ *
+ * OUTPUT:
+ *	Rx ring current and used indexes are updated.
+ *
+ * RETURN:
+ *	ETH_ERROR in case the routine can not access Rx desc ring.
+ *	ETH_QUEUE_FULL if Rx ring resources are exhausted.
+ *	ETH_END_OF_JOB if there is no received data.
+ *      ETH_OK otherwise.
+ *
+ *******************************************************************************/
+static ETH_FUNC_RET_STATUS eth_port_receive (ETH_PORT_INFO * p_eth_port_ctrl,
+					     ETH_QUEUE rx_queue,
+					     PKT_INFO * p_pkt_info)
+{
+	volatile ETH_RX_DESC *p_rx_curr_desc;
+	volatile ETH_RX_DESC *p_rx_next_curr_desc;
+	volatile ETH_RX_DESC *p_rx_used_desc;
+	unsigned int command_status;
+
+	/* Do not process Rx ring in case of Rx ring resource error */
+	if (p_eth_port_ctrl->rx_resource_err[rx_queue] == true) {
+		printf ("\nRx Queue is full ...\n");
+		return ETH_QUEUE_FULL;
+	}
+
+	/* Get the Rx Desc ring 'curr and 'used' indexes */
+	CURR_RFD_GET (p_rx_curr_desc, rx_queue);
+	USED_RFD_GET (p_rx_used_desc, rx_queue);
+
+	/* Sanity check */
+	if (p_rx_curr_desc == NULL)
+		return ETH_ERROR;
+
+	/* The following parameters are used to save readings from memory */
+	p_rx_next_curr_desc = RX_NEXT_DESC_PTR (p_rx_curr_desc, rx_queue);
+	command_status = p_rx_curr_desc->cmd_sts;
+
+	/* Nothing to receive... */
+	if (command_status & (ETH_BUFFER_OWNED_BY_DMA)) {
+/* 	DP(printf("Rx: command_status: %08x\n", command_status)); */
+		D_CACHE_FLUSH_LINE ((unsigned int) p_rx_curr_desc, 0);
+/*	DP(printf("\nETH_END_OF_JOB ...\n"));*/
+		return ETH_END_OF_JOB;
+	}
+
+	p_pkt_info->byte_cnt = (p_rx_curr_desc->byte_cnt) - RX_BUF_OFFSET;
+	p_pkt_info->cmd_sts = command_status;
+	p_pkt_info->buf_ptr = (p_rx_curr_desc->buf_ptr) + RX_BUF_OFFSET;
+	p_pkt_info->return_info = p_rx_curr_desc->return_info;
+	p_pkt_info->l4i_chk = p_rx_curr_desc->buf_size;	/* IP fragment indicator */
+
+	/* Clean the return info field to indicate that the packet has been */
+	/* moved to the upper layers                                        */
+	p_rx_curr_desc->return_info = 0;
+
+	/* Update 'curr' in data structure */
+	CURR_RFD_SET (p_rx_next_curr_desc, rx_queue);
+
+	/* Rx descriptors resource exhausted. Set the Rx ring resource error flag */
+	if (p_rx_next_curr_desc == p_rx_used_desc)
+		p_eth_port_ctrl->rx_resource_err[rx_queue] = true;
+
+	D_CACHE_FLUSH_LINE ((unsigned int) p_rx_curr_desc, 0);
+	CPU_PIPE_FLUSH;
+	return ETH_OK;
+}
+
+/*******************************************************************************
+ * eth_rx_return_buff - Returns a Rx buffer back to the Rx ring.
+ *
+ * DESCRIPTION:
+ *	This routine returns a Rx buffer back to the Rx ring. It retrieves the
+ *      next 'used' descriptor and attached the returned buffer to it.
+ *      In case the Rx ring was in "resource error" condition, where there are
+ *      no available Rx resources, the function resets the resource error flag.
+ *
+ * INPUT:
+ *	ETH_PORT_INFO   *p_eth_port_ctrl   Ethernet Port Control srtuct.
+ *	ETH_QUEUE   	rx_queue         Number of Rx queue.
+ *      PKT_INFO        *p_pkt_info       Information on the returned buffer.
+ *
+ * OUTPUT:
+ *	New available Rx resource in Rx descriptor ring.
+ *
+ * RETURN:
+ *	ETH_ERROR in case the routine can not access Rx desc ring.
+ *      ETH_OK otherwise.
+ *
+ *******************************************************************************/
+static ETH_FUNC_RET_STATUS eth_rx_return_buff (ETH_PORT_INFO *
+					       p_eth_port_ctrl,
+					       ETH_QUEUE rx_queue,
+					       PKT_INFO * p_pkt_info)
+{
+	volatile ETH_RX_DESC *p_used_rx_desc;	/* Where to return Rx resource */
+
+	/* Get 'used' Rx descriptor */
+	USED_RFD_GET (p_used_rx_desc, rx_queue);
+
+	/* Sanity check */
+	if (p_used_rx_desc == NULL)
+		return ETH_ERROR;
+
+	p_used_rx_desc->buf_ptr = p_pkt_info->buf_ptr;
+	p_used_rx_desc->return_info = p_pkt_info->return_info;
+	p_used_rx_desc->byte_cnt = p_pkt_info->byte_cnt;
+	p_used_rx_desc->buf_size = MV64460_RX_BUFFER_SIZE;	/* Reset Buffer size */
+
+	/* Flush the write pipe */
+	CPU_PIPE_FLUSH;
+
+	/* Return the descriptor to DMA ownership */
+	p_used_rx_desc->cmd_sts =
+		ETH_BUFFER_OWNED_BY_DMA | ETH_RX_ENABLE_INTERRUPT;
+
+	/* Flush descriptor and CPU pipe */
+	D_CACHE_FLUSH_LINE ((unsigned int) p_used_rx_desc, 0);
+	CPU_PIPE_FLUSH;
+
+	/* Move the used descriptor pointer to the next descriptor */
+	USED_RFD_SET (RX_NEXT_DESC_PTR (p_used_rx_desc, rx_queue), rx_queue);
+
+	/* Any Rx return cancels the Rx resource error status */
+	if (p_eth_port_ctrl->rx_resource_err[rx_queue] == true)
+		p_eth_port_ctrl->rx_resource_err[rx_queue] = false;
+
+	return ETH_OK;
+}
+
+/*******************************************************************************
+ * eth_port_set_rx_coal - Sets coalescing interrupt mechanism on RX path
+ *
+ * DESCRIPTION:
+ *	This routine sets the RX coalescing interrupt mechanism parameter.
+ *	This parameter is a timeout counter, that counts in 64 t_clk
+ *	chunks ; that when timeout event occurs a maskable interrupt
+ *	occurs.
+ *	The parameter is calculated using the tClk of the MV-643xx chip
+ *	, and the required delay of the interrupt in usec.
+ *
+ * INPUT:
+ *	ETH_PORT eth_port_num      Ethernet port number
+ *	unsigned int t_clk        t_clk of the MV-643xx chip in HZ units
+ *	unsigned int delay       Delay in usec
+ *
+ * OUTPUT:
+ *	Interrupt coalescing mechanism value is set in MV-643xx chip.
+ *
+ * RETURN:
+ *	The interrupt coalescing value set in the gigE port.
+ *
+ *******************************************************************************/
+#if 0				/* FIXME */
+static unsigned int eth_port_set_rx_coal (ETH_PORT eth_port_num,
+					  unsigned int t_clk,
+					  unsigned int delay)
+{
+	unsigned int coal;
+
+	coal = ((t_clk / 1000000) * delay) / 64;
+	/* Set RX Coalescing mechanism */
+	MV_REG_WRITE (MV64460_ETH_SDMA_CONFIG_REG (eth_port_num),
+		      ((coal & 0x3fff) << 8) |
+		      (MV_REG_READ
+		       (MV64460_ETH_SDMA_CONFIG_REG (eth_port_num))
+		       & 0xffc000ff));
+	return coal;
+}
+
+#endif
+/*******************************************************************************
+ * eth_port_set_tx_coal - Sets coalescing interrupt mechanism on TX path
+ *
+ * DESCRIPTION:
+ *	This routine sets the TX coalescing interrupt mechanism parameter.
+ *	This parameter is a timeout counter, that counts in 64 t_clk
+ *	chunks ; that when timeout event occurs a maskable interrupt
+ *	occurs.
+ *	The parameter is calculated using the t_cLK frequency of the
+ *	MV-643xx chip and the required delay in the interrupt in uSec
+ *
+ * INPUT:
+ *	ETH_PORT eth_port_num      Ethernet port number
+ *	unsigned int t_clk        t_clk of the MV-643xx chip in HZ units
+ *	unsigned int delay       Delay in uSeconds
+ *
+ * OUTPUT:
+ *	Interrupt coalescing mechanism value is set in MV-643xx chip.
+ *
+ * RETURN:
+ *	The interrupt coalescing value set in the gigE port.
+ *
+ *******************************************************************************/
+#if 0				/* FIXME */
+static unsigned int eth_port_set_tx_coal (ETH_PORT eth_port_num,
+					  unsigned int t_clk,
+					  unsigned int delay)
+{
+	unsigned int coal;
+
+	coal = ((t_clk / 1000000) * delay) / 64;
+	/* Set TX Coalescing mechanism */
+	MV_REG_WRITE (MV64460_ETH_TX_FIFO_URGENT_THRESHOLD_REG (eth_port_num),
+		      coal << 4);
+	return coal;
+}
+#endif
+
+/*******************************************************************************
+ * eth_b_copy - Copy bytes from source to destination
+ *
+ * DESCRIPTION:
+ *       This function supports the eight bytes limitation on Tx buffer size.
+ *       The routine will zero eight bytes starting from the destination address
+ *       followed by copying bytes from the source address to the destination.
+ *
+ * INPUT:
+ *       unsigned int src_addr    32 bit source address.
+ *       unsigned int dst_addr    32 bit destination address.
+ *       int        byte_count    Number of bytes to copy.
+ *
+ * OUTPUT:
+ *       See description.
+ *
+ * RETURN:
+ *       None.
+ *
+ *******************************************************************************/
+static void eth_b_copy (unsigned int src_addr, unsigned int dst_addr,
+			int byte_count)
+{
+	/* Zero the dst_addr area */
+	*(unsigned int *) dst_addr = 0x0;
+
+	while (byte_count != 0) {
+		*(char *) dst_addr = *(char *) src_addr;
+		dst_addr++;
+		src_addr++;
+		byte_count--;
+	}
+}