Patch by TsiChung Liew, 23 Sep 2004:

- add support for MPC8220 CPU
- Add support for Alaska and Yukon boards

1 files changed, 993 insertions, 0 deletions

diff --git a/cpu/mpc8220/fec.c b/cpu/mpc8220/fec.c
new file mode 100644
index 0000000..1bc51cd
--- /dev/null
+++ b/cpu/mpc8220/fec.c
@@ -0,0 +1,993 @@
+/*
+ * (C) Copyright 2003
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ *
+ * This file is based on mpc4200fec.c,
+ * (C) Copyright Motorola, Inc., 2000
+ */
+
+#include <common.h>
+#include <mpc8220.h>
+#include <malloc.h>
+#include <net.h>
+#include <miiphy.h>
+#include "dma.h"
+#include "fec.h"
+
+#define DEBUG	0
+/*tbd - rtm */
+/*#if (CONFIG_COMMANDS & CFG_CMD_NET) && defined(CONFIG_NET_MULTI) && \
+    defined(CONFIG_MPC8220_FEC)*/
+
+#if (CONFIG_COMMANDS & CFG_CMD_NET)
+
+#if (DEBUG & 0x60)
+static void tfifo_print (mpc8220_fec_priv * fec);
+static void rfifo_print (mpc8220_fec_priv * fec);
+#endif /* DEBUG */
+
+#if (DEBUG & 0x40)
+static u32 local_crc32 (char *string, unsigned int crc_value, int len);
+#endif
+
+typedef struct {
+	u8 data[1500];		/* actual data */
+	int length;		/* actual length */
+	int used;		/* buffer in use or not */
+	u8 head[16];		/* MAC header(6 + 6 + 2) + 2(aligned) */
+} NBUF;
+
+/********************************************************************/
+#if (DEBUG & 0x2)
+static void mpc8220_fec_phydump (void)
+{
+	u16 phyStatus, i;
+	u8 phyAddr = CONFIG_PHY_ADDR;
+	u8 reg_mask[] = {
+#if CONFIG_PHY_TYPE == 0x79c874 /* AMD Am79C874 */
+		/* regs to print: 0...7, 16...19, 21, 23, 24 */
+		1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0,
+		1, 1, 1, 1, 0, 1, 0, 1, 1, 0, 0, 0, 0, 0, 0, 0,
+#else
+		/* regs to print: 0...8, 16...20 */
+		1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0,
+		1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+#endif
+	};
+
+	for (i = 0; i < 32; i++) {
+		if (reg_mask[i]) {
+			miiphy_read (phyAddr, i, &phyStatus);
+			printf ("Mii reg %d: 0x%04x\n", i, phyStatus);
+		}
+	}
+}
+#endif
+
+/********************************************************************/
+static int mpc8220_fec_rbd_init (mpc8220_fec_priv * fec)
+{
+	int ix;
+	char *data;
+	static int once = 0;
+
+	for (ix = 0; ix < FEC_RBD_NUM; ix++) {
+		if (!once) {
+			data = (char *) malloc (FEC_MAX_PKT_SIZE);
+			if (data == NULL) {
+				printf ("RBD INIT FAILED\n");
+				return -1;
+			}
+			fec->rbdBase[ix].dataPointer = (u32) data;
+		}
+		fec->rbdBase[ix].status = FEC_RBD_EMPTY;
+		fec->rbdBase[ix].dataLength = 0;
+	}
+	once++;
+
+	/*
+	 * have the last RBD to close the ring
+	 */
+	fec->rbdBase[ix - 1].status |= FEC_RBD_WRAP;
+	fec->rbdIndex = 0;
+
+	return 0;
+}
+
+/********************************************************************/
+static void mpc8220_fec_tbd_init (mpc8220_fec_priv * fec)
+{
+	int ix;
+
+	for (ix = 0; ix < FEC_TBD_NUM; ix++) {
+		fec->tbdBase[ix].status = 0;
+	}
+
+	/*
+	 * Have the last TBD to close the ring
+	 */
+	fec->tbdBase[ix - 1].status |= FEC_TBD_WRAP;
+
+	/*
+	 * Initialize some indices
+	 */
+	fec->tbdIndex = 0;
+	fec->usedTbdIndex = 0;
+	fec->cleanTbdNum = FEC_TBD_NUM;
+}
+
+/********************************************************************/
+static void mpc8220_fec_rbd_clean (mpc8220_fec_priv * fec, FEC_RBD * pRbd)
+{
+	/*
+	 * Reset buffer descriptor as empty
+	 */
+	if ((fec->rbdIndex) == (FEC_RBD_NUM - 1))
+		pRbd->status = (FEC_RBD_WRAP | FEC_RBD_EMPTY);
+	else
+		pRbd->status = FEC_RBD_EMPTY;
+
+	pRbd->dataLength = 0;
+
+	/*
+	 * Now, we have an empty RxBD, restart the SmartDMA receive task
+	 */
+	DMA_TASK_ENABLE (FEC_RECV_TASK_NO);
+
+	/*
+	 * Increment BD count
+	 */
+	fec->rbdIndex = (fec->rbdIndex + 1) % FEC_RBD_NUM;
+}
+
+/********************************************************************/
+static void mpc8220_fec_tbd_scrub (mpc8220_fec_priv * fec)
+{
+	FEC_TBD *pUsedTbd;
+
+#if (DEBUG & 0x1)
+	printf ("tbd_scrub: fec->cleanTbdNum = %d, fec->usedTbdIndex = %d\n",
+		fec->cleanTbdNum, fec->usedTbdIndex);
+#endif
+
+	/*
+	 * process all the consumed TBDs
+	 */
+	while (fec->cleanTbdNum < FEC_TBD_NUM) {
+		pUsedTbd = &fec->tbdBase[fec->usedTbdIndex];
+		if (pUsedTbd->status & FEC_TBD_READY) {
+#if (DEBUG & 0x20)
+			printf ("Cannot clean TBD %d, in use\n",
+				fec->cleanTbdNum);
+#endif
+			return;
+		}
+
+		/*
+		 * clean this buffer descriptor
+		 */
+		if (fec->usedTbdIndex == (FEC_TBD_NUM - 1))
+			pUsedTbd->status = FEC_TBD_WRAP;
+		else
+			pUsedTbd->status = 0;
+
+		/*
+		 * update some indeces for a correct handling of the TBD ring
+		 */
+		fec->cleanTbdNum++;
+		fec->usedTbdIndex = (fec->usedTbdIndex + 1) % FEC_TBD_NUM;
+	}
+}
+
+/********************************************************************/
+static void mpc8220_fec_set_hwaddr (mpc8220_fec_priv * fec, char *mac)
+{
+	u8 currByte;		/* byte for which to compute the CRC */
+	int byte;		/* loop - counter */
+	int bit;		/* loop - counter */
+	u32 crc = 0xffffffff;	/* initial value */
+
+	/*
+	 * The algorithm used is the following:
+	 * we loop on each of the six bytes of the provided address,
+	 * and we compute the CRC by left-shifting the previous
+	 * value by one position, so that each bit in the current
+	 * byte of the address may contribute the calculation. If
+	 * the latter and the MSB in the CRC are different, then
+	 * the CRC value so computed is also ex-ored with the
+	 * "polynomium generator". The current byte of the address
+	 * is also shifted right by one bit at each iteration.
+	 * This is because the CRC generatore in hardware is implemented
+	 * as a shift-register with as many ex-ores as the radixes
+	 * in the polynomium. This suggests that we represent the
+	 * polynomiumm itself as a 32-bit constant.
+	 */
+	for (byte = 0; byte < 6; byte++) {
+		currByte = mac[byte];
+		for (bit = 0; bit < 8; bit++) {
+			if ((currByte & 0x01) ^ (crc & 0x01)) {
+				crc >>= 1;
+				crc = crc ^ 0xedb88320;
+			} else {
+				crc >>= 1;
+			}
+			currByte >>= 1;
+		}
+	}
+
+	crc = crc >> 26;
+
+	/*
+	 * Set individual hash table register
+	 */
+	if (crc >= 32) {
+		fec->eth->iaddr1 = (1 << (crc - 32));
+		fec->eth->iaddr2 = 0;
+	} else {
+		fec->eth->iaddr1 = 0;
+		fec->eth->iaddr2 = (1 << crc);
+	}
+
+	/*
+	 * Set physical address
+	 */
+	fec->eth->paddr1 =
+		(mac[0] << 24) + (mac[1] << 16) + (mac[2] << 8) + mac[3];
+	fec->eth->paddr2 = (mac[4] << 24) + (mac[5] << 16) + 0x8808;
+}
+
+/********************************************************************/
+static int mpc8220_fec_init (struct eth_device *dev, bd_t * bis)
+{
+	mpc8220_fec_priv *fec = (mpc8220_fec_priv *) dev->priv;
+	struct mpc8220_dma *dma = (struct mpc8220_dma *) MMAP_DMA;
+	const u8 phyAddr = CONFIG_PHY_ADDR;	/* Only one PHY */
+
+#if (DEBUG & 0x1)
+	printf ("mpc8220_fec_init... Begin\n");
+#endif
+
+	/*
+	 * Initialize RxBD/TxBD rings
+	 */
+	mpc8220_fec_rbd_init (fec);
+	mpc8220_fec_tbd_init (fec);
+
+	/*
+	 * Set up Pin Muxing for FEC 1
+	 */
+	*(vu_long *) MMAP_PCFG = 0;
+	*(vu_long *) (MMAP_PCFG + 4) = 0;
+	/*
+	 * Clear FEC-Lite interrupt event register(IEVENT)
+	 */
+	fec->eth->ievent = 0xffffffff;
+
+	/*
+	 * Set interrupt mask register
+	 */
+	fec->eth->imask = 0x00000000;
+
+	/*
+	 * Set FEC-Lite receive control register(R_CNTRL):
+	 */
+	if (fec->xcv_type == SEVENWIRE) {
+		/*
+		 * Frame length=1518; 7-wire mode
+		 */
+		fec->eth->r_cntrl = 0x05ee0020; /*0x05ee0000;FIXME */
+	} else {
+		/*
+		 * Frame length=1518; MII mode;
+		 */
+		fec->eth->r_cntrl = 0x05ee0024; /*0x05ee0004;FIXME */
+	}
+
+	fec->eth->x_cntrl = 0x00000000; /* half-duplex, heartbeat disabled */
+	if (fec->xcv_type != SEVENWIRE) {
+		/*
+		 * Set MII_SPEED = (1/(mii_speed * 2)) * System Clock
+		 * and do not drop the Preamble.
+		 */
+		/* tbd - rtm */
+		/*fec->eth->mii_speed = (((gd->ipb_clk >> 20) / 5) << 1); */
+		/* No MII for 7-wire mode */
+		fec->eth->mii_speed = 0x00000030;
+	}
+
+	/*
+	 * Set Opcode/Pause Duration Register
+	 */
+	fec->eth->op_pause = 0x00010020;	/*FIXME0xffff0020; */
+
+	/*
+	 * Set Rx FIFO alarm and granularity value
+	 */
+	fec->eth->rfifo_cntrl = 0x0c000000;
+	fec->eth->rfifo_alarm = 0x0000030c;
+#if (DEBUG & 0x22)
+	if (fec->eth->rfifo_status & 0x00700000) {
+		printf ("mpc8220_fec_init() RFIFO error\n");
+	}
+#endif
+
+	/*
+	 * Set Tx FIFO granularity value
+	 */
+	/*fec->eth->tfifo_cntrl = 0x0c000000; */ /*tbd - rtm */
+	fec->eth->tfifo_cntrl = 0x0e000000;
+#if (DEBUG & 0x2)
+	printf ("tfifo_status: 0x%08x\n", fec->eth->tfifo_status);
+	printf ("tfifo_alarm: 0x%08x\n", fec->eth->tfifo_alarm);
+#endif
+
+	/*
+	 * Set transmit fifo watermark register(X_WMRK), default = 64
+	 */
+	fec->eth->tfifo_alarm = 0x00000080;
+	fec->eth->x_wmrk = 0x2;
+
+	/*
+	 * Set individual address filter for unicast address
+	 * and set physical address registers.
+	 */
+	mpc8220_fec_set_hwaddr (fec, dev->enetaddr);
+
+	/*
+	 * Set multicast address filter
+	 */
+	fec->eth->gaddr1 = 0x00000000;
+	fec->eth->gaddr2 = 0x00000000;
+
+	/*
+	 * Turn ON cheater FSM: ????
+	 */
+	fec->eth->xmit_fsm = 0x03000000;
+
+#if 1
+/*#if defined(CONFIG_MPC5200)*/
+	/*
+	 * Turn off COMM bus prefetch in the MGT5200 BestComm. It doesn't
+	 * work w/ the current receive task.
+	 */
+	dma->PtdCntrl |= 0x00000001;
+#endif
+
+	/*
+	 * Set priority of different initiators
+	 */
+	dma->IPR0 = 7;		/* always */
+	dma->IPR3 = 6;		/* Eth RX */
+	dma->IPR4 = 5;		/* Eth Tx */
+
+	/*
+	 * Clear SmartDMA task interrupt pending bits
+	 */
+	DMA_CLEAR_IEVENT (FEC_RECV_TASK_NO);
+
+	/*
+	 * Initialize SmartDMA parameters stored in SRAM
+	 */
+	*(int *) FEC_TBD_BASE = (int) fec->tbdBase;
+	*(int *) FEC_RBD_BASE = (int) fec->rbdBase;
+	*(int *) FEC_TBD_NEXT = (int) fec->tbdBase;
+	*(int *) FEC_RBD_NEXT = (int) fec->rbdBase;
+
+	if (fec->xcv_type != SEVENWIRE) {
+		/*
+		 * Initialize PHY(LXT971A):
+		 *
+		 *   Generally, on power up, the LXT971A reads its configuration
+		 *   pins to check for forced operation, If not cofigured for
+		 *   forced operation, it uses auto-negotiation/parallel detection
+		 *   to automatically determine line operating conditions.
+		 *   If the PHY device on the other side of the link supports
+		 *   auto-negotiation, the LXT971A auto-negotiates with it
+		 *   using Fast Link Pulse(FLP) Bursts. If the PHY partner does not
+		 *   support auto-negotiation, the LXT971A automatically detects
+		 *   the presence of either link pulses(10Mbps PHY) or Idle
+		 *   symbols(100Mbps) and sets its operating conditions accordingly.
+		 *
+		 *   When auto-negotiation is controlled by software, the following
+		 *   steps are recommended.
+		 *
+		 * Note:
+		 *   The physical address is dependent on hardware configuration.
+		 *
+		 */
+		int timeout = 1;
+		u16 phyStatus;
+
+		/*
+		 * Reset PHY, then delay 300ns
+		 */
+		miiphy_write (phyAddr, 0x0, 0x8000);
+		udelay (1000);
+
+		if (fec->xcv_type == MII10) {
+			/*
+			 * Force 10Base-T, FDX operation
+			 */
+#if (DEBUG & 0x2)
+			printf ("Forcing 10 Mbps ethernet link... ");
+#endif
+			miiphy_read (phyAddr, 0x1, &phyStatus);
+			/*
+			   miiphy_write(fec, phyAddr, 0x0, 0x0100);
+			 */
+			miiphy_write (phyAddr, 0x0, 0x0180);
+
+			timeout = 20;
+			do {	/* wait for link status to go down */
+				udelay (10000);
+				if ((timeout--) == 0) {
+#if (DEBUG & 0x2)
+					printf ("hmmm, should not have waited...");
+#endif
+					break;
+				}
+				miiphy_read (phyAddr, 0x1, &phyStatus);
+#if (DEBUG & 0x2)
+				printf ("=");
+#endif
+			} while ((phyStatus & 0x0004)); /* !link up */
+
+			timeout = 1000;
+			do {	/* wait for link status to come back up */
+				udelay (10000);
+				if ((timeout--) == 0) {
+					printf ("failed. Link is down.\n");
+					break;
+				}
+				miiphy_read (phyAddr, 0x1, &phyStatus);
+#if (DEBUG & 0x2)
+				printf ("+");
+#endif
+			} while (!(phyStatus & 0x0004));	/* !link up */
+
+#if (DEBUG & 0x2)
+			printf ("done.\n");
+#endif
+		} else {	/* MII100 */
+			/*
+			 * Set the auto-negotiation advertisement register bits
+			 */
+			miiphy_write (phyAddr, 0x4, 0x01e1);
+
+			/*
+			 * Set MDIO bit 0.12 = 1(&& bit 0.9=1?) to enable auto-negotiation
+			 */
+			miiphy_write (phyAddr, 0x0, 0x1200);
+
+			/*
+			 * Wait for AN completion
+			 */
+			timeout = 5000;
+			do {
+				udelay (1000);
+
+				if ((timeout--) == 0) {
+#if (DEBUG & 0x2)
+					printf ("PHY auto neg 0 failed...\n");
+#endif
+					return -1;
+				}
+
+				if (miiphy_read (phyAddr, 0x1, &phyStatus) !=
+				    0) {
+#if (DEBUG & 0x2)
+					printf ("PHY auto neg 1 failed 0x%04x...\n", phyStatus);
+#endif
+					return -1;
+				}
+			} while (!(phyStatus & 0x0004));
+
+#if (DEBUG & 0x2)
+			printf ("PHY auto neg complete! \n");
+#endif
+		}
+
+	}
+
+	/*
+	 * Enable FEC-Lite controller
+	 */
+	fec->eth->ecntrl |= 0x00000006;
+
+#if (DEBUG & 0x2)
+	if (fec->xcv_type != SEVENWIRE)
+		mpc8220_fec_phydump ();
+#endif
+
+	/*
+	 * Enable SmartDMA receive task
+	 */
+	DMA_TASK_ENABLE (FEC_RECV_TASK_NO);
+
+#if (DEBUG & 0x1)
+	printf ("mpc8220_fec_init... Done \n");
+#endif
+
+	return 1;
+}
+
+/********************************************************************/
+static void mpc8220_fec_halt (struct eth_device *dev)
+{
+	mpc8220_fec_priv *fec = (mpc8220_fec_priv *) dev->priv;
+	int counter = 0xffff;
+
+#if (DEBUG & 0x2)
+	if (fec->xcv_type != SEVENWIRE)
+		mpc8220_fec_phydump ();
+#endif
+
+	/*
+	 * mask FEC chip interrupts
+	 */
+	fec->eth->imask = 0;
+
+	/*
+	 * issue graceful stop command to the FEC transmitter if necessary
+	 */
+	fec->eth->x_cntrl |= 0x00000001;
+
+	/*
+	 * wait for graceful stop to register
+	 */
+	while ((counter--) && (!(fec->eth->ievent & 0x10000000)));
+
+	/*
+	 * Disable SmartDMA tasks
+	 */
+	DMA_TASK_DISABLE (FEC_XMIT_TASK_NO);
+	DMA_TASK_DISABLE (FEC_RECV_TASK_NO);
+
+	/*
+	 * Disable the Ethernet Controller
+	 */
+	fec->eth->ecntrl &= 0xfffffffd;
+
+	/*
+	 * Clear FIFO status registers
+	 */
+	fec->eth->rfifo_status &= 0x00700000;
+	fec->eth->tfifo_status &= 0x00700000;
+
+	fec->eth->reset_cntrl = 0x01000000;
+
+	/*
+	 * Issue a reset command to the FEC chip
+	 */
+	fec->eth->ecntrl |= 0x1;
+
+	/*
+	 * wait at least 16 clock cycles
+	 */
+	udelay (10);
+
+#if (DEBUG & 0x3)
+	printf ("Ethernet task stopped\n");
+#endif
+}
+
+#if (DEBUG & 0x60)
+/********************************************************************/
+
+static void tfifo_print (mpc8220_fec_priv * fec)
+{
+	u16 phyAddr = CONFIG_PHY_ADDR;
+	u16 phyStatus;
+
+	if ((fec->eth->tfifo_lrf_ptr != fec->eth->tfifo_lwf_ptr)
+	    || (fec->eth->tfifo_rdptr != fec->eth->tfifo_wrptr)) {
+
+		miiphy_read (phyAddr, 0x1, &phyStatus);
+		printf ("\nphyStatus: 0x%04x\n", phyStatus);
+		printf ("ecntrl:   0x%08x\n", fec->eth->ecntrl);
+		printf ("ievent:   0x%08x\n", fec->eth->ievent);
+		printf ("x_status: 0x%08x\n", fec->eth->x_status);
+		printf ("tfifo: status	0x%08x\n", fec->eth->tfifo_status);
+
+		printf ("	control 0x%08x\n", fec->eth->tfifo_cntrl);
+		printf ("	lrfp	0x%08x\n", fec->eth->tfifo_lrf_ptr);
+		printf ("	lwfp	0x%08x\n", fec->eth->tfifo_lwf_ptr);
+		printf ("	alarm	0x%08x\n", fec->eth->tfifo_alarm);
+		printf ("	readptr 0x%08x\n", fec->eth->tfifo_rdptr);
+		printf ("	writptr 0x%08x\n", fec->eth->tfifo_wrptr);
+	}
+}
+
+static void rfifo_print (mpc8220_fec_priv * fec)
+{
+	u16 phyAddr = CONFIG_PHY_ADDR;
+	u16 phyStatus;
+
+	if ((fec->eth->rfifo_lrf_ptr != fec->eth->rfifo_lwf_ptr)
+	    || (fec->eth->rfifo_rdptr != fec->eth->rfifo_wrptr)) {
+
+		miiphy_read (phyAddr, 0x1, &phyStatus);
+		printf ("\nphyStatus: 0x%04x\n", phyStatus);
+		printf ("ecntrl:   0x%08x\n", fec->eth->ecntrl);
+		printf ("ievent:   0x%08x\n", fec->eth->ievent);
+		printf ("x_status: 0x%08x\n", fec->eth->x_status);
+		printf ("rfifo: status	0x%08x\n", fec->eth->rfifo_status);
+
+		printf ("	control 0x%08x\n", fec->eth->rfifo_cntrl);
+		printf ("	lrfp	0x%08x\n", fec->eth->rfifo_lrf_ptr);
+		printf ("	lwfp	0x%08x\n", fec->eth->rfifo_lwf_ptr);
+		printf ("	alarm	0x%08x\n", fec->eth->rfifo_alarm);
+		printf ("	readptr 0x%08x\n", fec->eth->rfifo_rdptr);
+		printf ("	writptr 0x%08x\n", fec->eth->rfifo_wrptr);
+	}
+}
+#endif /* DEBUG */
+
+/********************************************************************/
+
+static int mpc8220_fec_send (struct eth_device *dev, volatile void *eth_data,
+			     int data_length)
+{
+	/*
+	 * This routine transmits one frame.  This routine only accepts
+	 * 6-byte Ethernet addresses.
+	 */
+	mpc8220_fec_priv *fec = (mpc8220_fec_priv *) dev->priv;
+	FEC_TBD *pTbd;
+
+#if (DEBUG & 0x20)
+	printf ("tbd status: 0x%04x\n", fec->tbdBase[0].status);
+	tfifo_print (fec);
+#endif
+
+	/*
+	 * Clear Tx BD ring at first
+	 */
+	mpc8220_fec_tbd_scrub (fec);
+
+	/*
+	 * Check for valid length of data.
+	 */
+	if ((data_length > 1500) || (data_length <= 0)) {
+		return -1;
+	}
+
+	/*
+	 * Check the number of vacant TxBDs.
+	 */
+	if (fec->cleanTbdNum < 1) {
+#if (DEBUG & 0x20)
+		printf ("No available TxBDs ...\n");
+#endif
+		return -1;
+	}
+
+	/*
+	 * Get the first TxBD to send the mac header
+	 */
+	pTbd = &fec->tbdBase[fec->tbdIndex];
+	pTbd->dataLength = data_length;
+	pTbd->dataPointer = (u32) eth_data;
+	pTbd->status |= FEC_TBD_LAST | FEC_TBD_TC | FEC_TBD_READY;
+	fec->tbdIndex = (fec->tbdIndex + 1) % FEC_TBD_NUM;
+
+#if (DEBUG & 0x100)
+	printf ("DMA_TASK_ENABLE, fec->tbdIndex = %d \n", fec->tbdIndex);
+#endif
+
+	/*
+	 * Kick the MII i/f
+	 */
+	if (fec->xcv_type != SEVENWIRE) {
+		u16 phyStatus;
+
+		miiphy_read (0, 0x1, &phyStatus);
+	}
+
+	/*
+	 * Enable SmartDMA transmit task
+	 */
+
+#if (DEBUG & 0x20)
+	tfifo_print (fec);
+#endif
+
+	DMA_TASK_ENABLE (FEC_XMIT_TASK_NO);
+
+#if (DEBUG & 0x20)
+	tfifo_print (fec);
+#endif
+
+#if (DEBUG & 0x8)
+	printf ("+");
+#endif
+
+	fec->cleanTbdNum -= 1;
+
+#if (DEBUG & 0x129) && (DEBUG & 0x80000000)
+	printf ("smartDMA ethernet Tx task enabled\n");
+#endif
+	/*
+	 * wait until frame is sent .
+	 */
+	while (pTbd->status & FEC_TBD_READY) {
+		udelay (10);
+#if (DEBUG & 0x8)
+		printf ("TDB status = %04x\n", pTbd->status);
+#endif
+	}
+
+	return 0;
+}
+
+
+/********************************************************************/
+static int mpc8220_fec_recv (struct eth_device *dev)
+{
+	/*
+	 * This command pulls one frame from the card
+	 */
+	mpc8220_fec_priv *fec = (mpc8220_fec_priv *) dev->priv;
+	FEC_RBD *pRbd = &fec->rbdBase[fec->rbdIndex];
+	unsigned long ievent;
+	int frame_length, len = 0;
+	NBUF *frame;
+
+#if (DEBUG & 0x1)
+	printf ("mpc8220_fec_recv %d Start...\n", fec->rbdIndex);
+#endif
+#if (DEBUG & 0x8)
+	printf ("-");
+#endif
+
+	/*
+	 * Check if any critical events have happened
+	 */
+	ievent = fec->eth->ievent;
+	fec->eth->ievent = ievent;
+	if (ievent & 0x20060000) {
+		/* BABT, Rx/Tx FIFO errors */
+		mpc8220_fec_halt (dev);
+		mpc8220_fec_init (dev, NULL);
+		return 0;
+	}
+	if (ievent & 0x80000000) {
+		/* Heartbeat error */
+		fec->eth->x_cntrl |= 0x00000001;
+	}
+	if (ievent & 0x10000000) {
+		/* Graceful stop complete */
+		if (fec->eth->x_cntrl & 0x00000001) {
+			mpc8220_fec_halt (dev);
+			fec->eth->x_cntrl &= ~0x00000001;
+			mpc8220_fec_init (dev, NULL);
+		}
+	}
+
+	if (!(pRbd->status & FEC_RBD_EMPTY)) {
+		if ((pRbd->status & FEC_RBD_LAST)
+		    && !(pRbd->status & FEC_RBD_ERR)
+		    && ((pRbd->dataLength - 4) > 14)) {
+
+			/*
+			 * Get buffer address and size
+			 */
+			frame = (NBUF *) pRbd->dataPointer;
+			frame_length = pRbd->dataLength - 4;
+
+#if (0)
+			{
+				int i;
+
+				printf ("recv data hdr:");
+				for (i = 0; i < 14; i++)
+					printf ("%x ", *(frame->head + i));
+				printf ("\n");
+			}
+#endif
+			/*
+			 *  Fill the buffer and pass it to upper layers
+			 */
+/*			memcpy(buff, frame->head, 14);
+			memcpy(buff + 14, frame->data, frame_length);*/
+			NetReceive ((volatile uchar *) pRbd->dataPointer,
+				    frame_length);
+			len = frame_length;
+		}
+		/*
+		 * Reset buffer descriptor as empty
+		 */
+		mpc8220_fec_rbd_clean (fec, pRbd);
+	}
+	DMA_CLEAR_IEVENT (FEC_RECV_TASK_NO);
+	return len;
+}
+
+
+/********************************************************************/
+int mpc8220_fec_initialize (bd_t * bis)
+{
+	mpc8220_fec_priv *fec;
+
+#ifdef CONFIG_ETH1ADDR
+	mpc8220_fec_priv *fec2;
+#endif
+	struct eth_device *dev;
+	char *tmp, *end;
+	char env_enetaddr[6];
+
+#ifdef CONFIG_ETH1ADDR
+	char env_enet1addr[6];
+#endif
+	int i;
+
+	fec = (mpc8220_fec_priv *) malloc (sizeof (*fec));
+	dev = (struct eth_device *) malloc (sizeof (*dev));
+	memset (dev, 0, sizeof *dev);
+
+	fec->eth = (ethernet_regs *) MMAP_FEC1;
+#ifdef CONFIG_ETH1ADDR
+	fec2 = (mpc8220_fec_priv *) malloc (sizeof (*fec));
+	fec2->eth = (ethernet_regs *) MMAP_FEC2;
+#endif
+	fec->tbdBase = (FEC_TBD *) FEC_BD_BASE;
+	fec->rbdBase =
+		(FEC_RBD *) (FEC_BD_BASE + FEC_TBD_NUM * sizeof (FEC_TBD));
+	fec->xcv_type = MII100;
+
+	dev->priv = (void *) fec;
+	dev->iobase = MMAP_FEC1;
+	dev->init = mpc8220_fec_init;
+	dev->halt = mpc8220_fec_halt;
+	dev->send = mpc8220_fec_send;
+	dev->recv = mpc8220_fec_recv;
+
+	sprintf (dev->name, "FEC ETHERNET");
+	eth_register (dev);
+
+	/*
+	 * Try to set the mac address now. The fec mac address is
+	 * a garbage after reset. When not using fec for booting
+	 * the Linux fec driver will try to work with this garbage.
+	 */
+	tmp = getenv ("ethaddr");
+	if (tmp) {
+		for (i = 0; i < 6; i++) {
+			env_enetaddr[i] =
+				tmp ? simple_strtoul (tmp, &end, 16) : 0;
+			if (tmp)
+				tmp = (*end) ? end + 1 : end;
+		}
+		mpc8220_fec_set_hwaddr (fec, env_enetaddr);
+	}
+#ifdef CONFIG_ETH1ADDR
+	tmp = getenv ("eth1addr");
+	if (tmp) {
+		for (i = 0; i < 6; i++) {
+			env_enet1addr[i] =
+				tmp ? simple_strtoul (tmp, &end, 16) : 0;
+			if (tmp)
+				tmp = (*end) ? end + 1 : end;
+		}
+		mpc8220_fec_set_hwaddr (fec2, env_enet1addr);
+	}
+#endif
+
+	return 1;
+}
+
+/* MII-interface related functions */
+/********************************************************************/
+int miiphy_read (u8 phyAddr, u8 regAddr, u16 * retVal)
+{
+	ethernet_regs *eth = (ethernet_regs *) MMAP_FEC1;
+	u32 reg;		/* convenient holder for the PHY register */
+	u32 phy;		/* convenient holder for the PHY */
+	int timeout = 0xffff;
+
+	/*
+	 * reading from any PHY's register is done by properly
+	 * programming the FEC's MII data register.
+	 */
+	reg = regAddr << FEC_MII_DATA_RA_SHIFT;
+	phy = phyAddr << FEC_MII_DATA_PA_SHIFT;
+
+	eth->mii_data =
+		(FEC_MII_DATA_ST | FEC_MII_DATA_OP_RD | FEC_MII_DATA_TA | phy
+		 | reg);
+
+	/*
+	 * wait for the related interrupt
+	 */
+	while ((timeout--) && (!(eth->ievent & 0x00800000)));
+
+	if (timeout == 0) {
+#if (DEBUG & 0x2)
+		printf ("Read MDIO failed...\n");
+#endif
+		return -1;
+	}
+
+	/*
+	 * clear mii interrupt bit
+	 */
+	eth->ievent = 0x00800000;
+
+	/*
+	 * it's now safe to read the PHY's register
+	 */
+	*retVal = (u16) eth->mii_data;
+
+	return 0;
+}
+
+/********************************************************************/
+int miiphy_write (u8 phyAddr, u8 regAddr, u16 data)
+{
+	ethernet_regs *eth = (ethernet_regs *) MMAP_FEC1;
+	u32 reg;		/* convenient holder for the PHY register */
+	u32 phy;		/* convenient holder for the PHY */
+	int timeout = 0xffff;
+
+	reg = regAddr << FEC_MII_DATA_RA_SHIFT;
+	phy = phyAddr << FEC_MII_DATA_PA_SHIFT;
+
+	eth->mii_data = (FEC_MII_DATA_ST | FEC_MII_DATA_OP_WR |
+			 FEC_MII_DATA_TA | phy | reg | data);
+
+	/*
+	 * wait for the MII interrupt
+	 */
+	while ((timeout--) && (!(eth->ievent & 0x00800000)));
+
+	if (timeout == 0) {
+#if (DEBUG & 0x2)
+		printf ("Write MDIO failed...\n");
+#endif
+		return -1;
+	}
+
+	/*
+	 * clear MII interrupt bit
+	 */
+	eth->ievent = 0x00800000;
+
+	return 0;
+}
+
+#if (DEBUG & 0x40)
+static u32 local_crc32 (char *string, unsigned int crc_value, int len)
+{
+	int i;
+	char c;
+	unsigned int crc, count;
+
+	/*
+	 * crc32 algorithm
+	 */
+	/*
+	 * crc = 0xffffffff; * The initialized value should be 0xffffffff
+	 */
+	crc = crc_value;
+
+	for (i = len; --i >= 0;) {
+		c = *string++;
+		for (count = 0; count < 8; count++) {
+			if ((c & 0x01) ^ (crc & 0x01)) {
+				crc >>= 1;
+				crc = crc ^ 0xedb88320;
+			} else {
+				crc >>= 1;
+			}
+			c >>= 1;
+		}
+	}
+
+	/*
+	 * In big endian system, do byte swaping for crc value
+	 */
+	return crc;
+}
+#endif /* DEBUG */
+
+#endif /* CONFIG_MPC8220_FEC */