mv_eth.c

uboot在arm处理器s3c2410的移植代码

/*
 * (C) Copyright 2003
 * Ingo Assmus <[e-mail]>
 *
 * based on - Driver for MV64460X ethernet ports
 * Copyright (C) 2002 [e-mail]
 *
 * 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);