cpu/mpc8260/ether_scc.c - u-boot - Git at Google

 /*
  * MPC8260 SCC Ethernet
  *
  * Copyright (c) 2000 MontaVista Software, Inc.   Dan Malek (dmalek@jlc.net)
  *
  * (C) Copyright 2000 Sysgo Real-Time Solutions, GmbH <www.elinos.com>
  * Marius Groeger <mgroeger@sysgo.de>
  *
  * (C) Copyright (c) 2001
  * Advent Networks, Inc. <http://www.adventnetworks.com>
  * Jay Monkman <jtm@smoothsmoothie.com>
  *
  * 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
  */

 #include <common.h>
 #include <asm/cpm_8260.h>
 #include <mpc8260.h>
 #include <net.h>
 #include <command.h>
 #include <config.h>

 #if defined(CONFIG_ETHER_ON_SCC) && (CONFIG_COMMANDS & CFG_CMD_NET)

 #if (CONFIG_ETHER_INDEX == 1)
 #  define PROFF_ENET            PROFF_SCC1
 #  define CPM_CR_ENET_PAGE      CPM_CR_SCC1_PAGE
 #  define CPM_CR_ENET_SBLOCK    CPM_CR_SCC1_SBLOCK
 #  define CMXSCR_MASK          (CMXSCR_SC1          |\
 				CMXSCR_RS1CS_MSK    |\
 				CMXSCR_TS1CS_MSK)

 #elif (CONFIG_ETHER_INDEX == 2)
 #  define PROFF_ENET            PROFF_SCC2
 #  define CPM_CR_ENET_PAGE      CPM_CR_SCC2_PAGE
 #  define CPM_CR_ENET_SBLOCK    CPM_CR_SCC2_SBLOCK
 #  define CMXSCR_MASK          (CMXSCR_SC2          |\
 				CMXSCR_RS2CS_MSK    |\
 				CMXSCR_TS2CS_MSK)

 #elif (CONFIG_ETHER_INDEX == 3)
 #  define PROFF_ENET            PROFF_SCC3
 #  define CPM_CR_ENET_PAGE      CPM_CR_SCC3_PAGE
 #  define CPM_CR_ENET_SBLOCK    CPM_CR_SCC3_SBLOCK
 #  define CMXSCR_MASK          (CMXSCR_SC3          |\
 				CMXSCR_RS3CS_MSK    |\
 				CMXSCR_TS3CS_MSK)
 #elif (CONFIG_ETHER_INDEX == 4)
 #  define PROFF_ENET            PROFF_SCC4
 #  define CPM_CR_ENET_PAGE      CPM_CR_SCC4_PAGE
 #  define CPM_CR_ENET_SBLOCK    CPM_CR_SCC4_SBLOCK
 #  define CMXSCR_MASK          (CMXSCR_SC4          |\
 				CMXSCR_RS4CS_MSK    |\
 				CMXSCR_TS4CS_MSK)

 #endif


 /* Ethernet Transmit and Receive Buffers */
 #define DBUF_LENGTH  1520

 #define TX_BUF_CNT 2

 #define TOUT_LOOP 1000000

 static char txbuf[TX_BUF_CNT][ DBUF_LENGTH ];

 static uint rxIdx;      /* index of the current RX buffer */
 static uint txIdx;      /* index of the current TX buffer */

 /*
  * SCC Ethernet Tx and Rx buffer descriptors allocated at the
  *  immr->udata_bd address on Dual-Port RAM
  * Provide for Double Buffering
  */

 typedef volatile struct CommonBufferDescriptor {
     cbd_t rxbd[PKTBUFSRX];         /* Rx BD */
     cbd_t txbd[TX_BUF_CNT];        /* Tx BD */
 } RTXBD;

 static RTXBD *rtx;


 int eth_send(volatile void *packet, int length)
 {
     int i;
     int result = 0;

     if (length <= 0) {
 	printf("scc: bad packet size: %d\n", length);
 	goto out;
     }

     for(i=0; rtx->txbd[txIdx].cbd_sc & BD_ENET_TX_READY; i++) {
 	if (i >= TOUT_LOOP) {
 	    puts ("scc: tx buffer not ready\n");
 	    goto out;
 	}
     }

     rtx->txbd[txIdx].cbd_bufaddr = (uint)packet;
     rtx->txbd[txIdx].cbd_datlen = length;
     rtx->txbd[txIdx].cbd_sc |= (BD_ENET_TX_READY | BD_ENET_TX_LAST |
 				BD_ENET_TX_WRAP);

     for(i=0; rtx->txbd[txIdx].cbd_sc & BD_ENET_TX_READY; i++) {
 	if (i >= TOUT_LOOP) {
 	    puts ("scc: tx error\n");
 	    goto out;
 	}
     }

     /* return only status bits */
     result = rtx->txbd[txIdx].cbd_sc & BD_ENET_TX_STATS;

  out:
     return result;
 }


 int eth_rx(void)
 {
     int length;

     for (;;)
     {
 	if (rtx->rxbd[rxIdx].cbd_sc & BD_ENET_RX_EMPTY) {
 	    length = -1;
 	    break;     /* nothing received - leave for() loop */
 	}

 	length = rtx->rxbd[rxIdx].cbd_datlen;

 	if (rtx->rxbd[rxIdx].cbd_sc & 0x003f)
 	{
 	    printf("err: %x\n", rtx->rxbd[rxIdx].cbd_sc);
 	}
 	else
 	{
 	    /* Pass the packet up to the protocol layers. */
 	    NetReceive(NetRxPackets[rxIdx], length - 4);
 	}


 	/* Give the buffer back to the SCC. */
 	rtx->rxbd[rxIdx].cbd_datlen = 0;

 	/* wrap around buffer index when necessary */
 	if ((rxIdx + 1) >= PKTBUFSRX) {
 	    rtx->rxbd[PKTBUFSRX - 1].cbd_sc = (BD_ENET_RX_WRAP |
 					       BD_ENET_RX_EMPTY);
 	    rxIdx = 0;
 	}
 	else {
 	    rtx->rxbd[rxIdx].cbd_sc = BD_ENET_RX_EMPTY;
 	    rxIdx++;
 	}
     }
     return length;
 }

 /**************************************************************
  *
  * SCC Ethernet Initialization Routine
  *
  *************************************************************/

 int eth_init(bd_t *bis)
 {
     int i;
     volatile immap_t *immr = (immap_t *)CFG_IMMR;
     scc_enet_t *pram_ptr;
     uint dpaddr;

     rxIdx = 0;
     txIdx = 0;

     /* assign static pointer to BD area */
     dpaddr = m8260_cpm_dpalloc(sizeof(RTXBD) + 2, 16);
     rtx = (RTXBD *)&immr->im_dprambase[dpaddr];

     /* 24.21 - (1-3): ioports have been set up already */

     /* 24.21 - (4,5): connect SCC's tx and rx clocks, use NMSI for SCC */
     immr->im_cpmux.cmx_uar = 0;
     immr->im_cpmux.cmx_scr = ( (immr->im_cpmux.cmx_scr & ~CMXSCR_MASK) |
 			       CFG_CMXSCR_VALUE);


     /* 24.21 (6) write RBASE and TBASE to parameter RAM */
     pram_ptr = (scc_enet_t *)&(immr->im_dprambase[PROFF_ENET]);
     pram_ptr->sen_genscc.scc_rbase = (unsigned int)(&rtx->rxbd[0]);
     pram_ptr->sen_genscc.scc_tbase = (unsigned int)(&rtx->txbd[0]);

     pram_ptr->sen_genscc.scc_rfcr = 0x18;  /* Nrml Ops and Mot byte ordering */
     pram_ptr->sen_genscc.scc_tfcr = 0x18;  /* Mot byte ordering, Nrml access */

     pram_ptr->sen_genscc.scc_mrblr = DBUF_LENGTH; /* max. package len 1520 */

     pram_ptr->sen_cpres  = ~(0x0);        /* Preset CRC */
     pram_ptr->sen_cmask  = 0xdebb20e3;    /* Constant Mask for CRC */


     /* 24.21 - (7): Write INIT RX AND TX PARAMETERS to CPCR */
     while(immr->im_cpm.cp_cpcr & CPM_CR_FLG);
     immr->im_cpm.cp_cpcr = mk_cr_cmd(CPM_CR_ENET_PAGE,
 				     CPM_CR_ENET_SBLOCK,
 				     0x0c,
 				     CPM_CR_INIT_TRX) | CPM_CR_FLG;

     /* 24.21 - (8-18): Set up parameter RAM */
     pram_ptr->sen_crcec  = 0x0;           /* Error Counter CRC (unused) */
     pram_ptr->sen_alec   = 0x0;           /* Align Error Counter (unused) */
     pram_ptr->sen_disfc  = 0x0;           /* Discard Frame Counter (unused) */

     pram_ptr->sen_pads   = 0x8888;        /* Short Frame PAD Characters */

     pram_ptr->sen_retlim = 15;            /* Retry Limit Threshold */

     pram_ptr->sen_maxflr = 1518;  /* MAX Frame Length Register */
     pram_ptr->sen_minflr = 64;            /* MIN Frame Length Register */

     pram_ptr->sen_maxd1  = DBUF_LENGTH;   /* MAX DMA1 Length Register */
     pram_ptr->sen_maxd2  = DBUF_LENGTH;   /* MAX DMA2 Length Register */

     pram_ptr->sen_gaddr1 = 0x0;   /* Group Address Filter 1 (unused) */
     pram_ptr->sen_gaddr2 = 0x0;   /* Group Address Filter 2 (unused) */
     pram_ptr->sen_gaddr3 = 0x0;   /* Group Address Filter 3 (unused) */
     pram_ptr->sen_gaddr4 = 0x0;   /* Group Address Filter 4 (unused) */

 #  define ea bis->bi_enetaddr
     pram_ptr->sen_paddrh = (ea[5] << 8) + ea[4];
     pram_ptr->sen_paddrm = (ea[3] << 8) + ea[2];
     pram_ptr->sen_paddrl = (ea[1] << 8) + ea[0];
 #  undef ea

     pram_ptr->sen_pper   = 0x0;   /* Persistence (unused) */

     pram_ptr->sen_iaddr1 = 0x0;   /* Individual Address Filter 1 (unused) */
     pram_ptr->sen_iaddr2 = 0x0;   /* Individual Address Filter 2 (unused) */
     pram_ptr->sen_iaddr3 = 0x0;   /* Individual Address Filter 3 (unused) */
     pram_ptr->sen_iaddr4 = 0x0;   /* Individual Address Filter 4 (unused) */

     pram_ptr->sen_taddrh = 0x0;   /* Tmp Address (MSB) (unused) */
     pram_ptr->sen_taddrm = 0x0;   /* Tmp Address (unused) */
     pram_ptr->sen_taddrl = 0x0;   /* Tmp Address (LSB) (unused) */


     /* 24.21 - (19): Initialize RxBD */
     for (i = 0; i < PKTBUFSRX; i++)
     {
 	rtx->rxbd[i].cbd_sc = BD_ENET_RX_EMPTY;
 	rtx->rxbd[i].cbd_datlen = 0;                  /* Reset */
 	rtx->rxbd[i].cbd_bufaddr = (uint)NetRxPackets[i];
     }

     rtx->rxbd[PKTBUFSRX - 1].cbd_sc |= BD_ENET_RX_WRAP;

     /* 24.21 - (20): Initialize TxBD */
     for (i = 0; i < TX_BUF_CNT; i++)
     {
 	rtx->txbd[i].cbd_sc = (BD_ENET_TX_PAD  |
 			       BD_ENET_TX_LAST |
 			       BD_ENET_TX_TC);
 	rtx->txbd[i].cbd_datlen = 0;                  /* Reset */
 	rtx->txbd[i].cbd_bufaddr = (uint)&txbuf[i][0];
     }

     rtx->txbd[TX_BUF_CNT - 1].cbd_sc |= BD_ENET_TX_WRAP;

     /* 24.21 - (21): Write 0xffff to SCCE */
     immr->im_scc[CONFIG_ETHER_INDEX-1].scc_scce = ~(0x0);

     /* 24.21 - (22): Write to SCCM to enable TXE, RXF, TXB events */
     immr->im_scc[CONFIG_ETHER_INDEX-1].scc_sccm = (SCCE_ENET_TXE |
 						   SCCE_ENET_RXF |
 						   SCCE_ENET_TXB);

     /* 24.21 - (23): we don't use ethernet interrupts */

     /* 24.21 - (24): Clear GSMR_H to enable normal operations */
     immr->im_scc[CONFIG_ETHER_INDEX-1].scc_gsmrh = 0;

     /* 24.21 - (25): Clear GSMR_L to enable normal operations */
     immr->im_scc[CONFIG_ETHER_INDEX-1].scc_gsmrl = (SCC_GSMRL_TCI        |
 						    SCC_GSMRL_TPL_48     |
 						    SCC_GSMRL_TPP_10     |
 						    SCC_GSMRL_MODE_ENET);

     /* 24.21 - (26): Initialize DSR */
     immr->im_scc[CONFIG_ETHER_INDEX-1].scc_dsr = 0xd555;

     /* 24.21 - (27): Initialize PSMR2
      *
      * Settings:
      *	CRC = 32-Bit CCITT
      *	NIB = Begin searching for SFD 22 bits after RENA
      *	FDE = Full Duplex Enable
      *	BRO = Reject broadcast packets
      *	PROMISCOUS = Catch all packets regardless of dest. MAC adress
      */
     immr->im_scc[CONFIG_ETHER_INDEX-1].scc_psmr   =	SCC_PSMR_ENCRC	|
 							SCC_PSMR_NIB22	|
 #if defined(CONFIG_SCC_ENET_FULL_DUPLEX)
 							SCC_PSMR_FDE	|
 #endif
 #if defined(CONFIG_SCC_ENET_NO_BROADCAST)
 							SCC_PSMR_BRO	|
 #endif
 #if defined(CONFIG_SCC_ENET_PROMISCOUS)
 							SCC_PSMR_PRO	|
 #endif
 							0;

     /* 24.21 - (28): Write to GSMR_L to enable SCC */
     immr->im_scc[CONFIG_ETHER_INDEX-1].scc_gsmrl |= (SCC_GSMRL_ENR |
 						     SCC_GSMRL_ENT);

     return 0;
 }


 void eth_halt(void)
 {
     volatile immap_t *immr = (immap_t *)CFG_IMMR;
     immr->im_scc[CONFIG_ETHER_INDEX-1].scc_gsmrl &= ~(SCC_GSMRL_ENR |
 						      SCC_GSMRL_ENT);
 }

 #if 0
 void restart(void)
 {
     volatile immap_t *immr = (immap_t *)CFG_IMMR;
     immr->im_cpm.cp_scc[CONFIG_ETHER_INDEX-1].scc_gsmrl |= (SCC_GSMRL_ENR |
 							    SCC_GSMRL_ENT);
 }
 #endif

 #endif  /* CONFIG_ETHER_ON_SCC && CFG_CMD_NET */
	/*
	* MPC8260 SCC Ethernet
	*
	* Copyright (c) 2000 MontaVista Software, Inc. Dan Malek (dmalek@jlc.net)
	*
	* (C) Copyright 2000 Sysgo Real-Time Solutions, GmbH <www.elinos.com>
	* Marius Groeger <mgroeger@sysgo.de>
	*
	* (C) Copyright (c) 2001
	* Advent Networks, Inc. <http://www.adventnetworks.com>
	* Jay Monkman <jtm@smoothsmoothie.com>
	*
	* 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
	*/

	#include <common.h>
	#include <asm/cpm_8260.h>
	#include <mpc8260.h>
	#include <net.h>
	#include <command.h>
	#include <config.h>

	#if defined(CONFIG_ETHER_ON_SCC) && (CONFIG_COMMANDS & CFG_CMD_NET)

	#if (CONFIG_ETHER_INDEX == 1)
	# define PROFF_ENET PROFF_SCC1
	# define CPM_CR_ENET_PAGE CPM_CR_SCC1_PAGE
	# define CPM_CR_ENET_SBLOCK CPM_CR_SCC1_SBLOCK
	# define CMXSCR_MASK (CMXSCR_SC1 \|\
	CMXSCR_RS1CS_MSK \|\
	CMXSCR_TS1CS_MSK)

	#elif (CONFIG_ETHER_INDEX == 2)
	# define PROFF_ENET PROFF_SCC2
	# define CPM_CR_ENET_PAGE CPM_CR_SCC2_PAGE
	# define CPM_CR_ENET_SBLOCK CPM_CR_SCC2_SBLOCK
	# define CMXSCR_MASK (CMXSCR_SC2 \|\
	CMXSCR_RS2CS_MSK \|\
	CMXSCR_TS2CS_MSK)

	#elif (CONFIG_ETHER_INDEX == 3)
	# define PROFF_ENET PROFF_SCC3
	# define CPM_CR_ENET_PAGE CPM_CR_SCC3_PAGE
	# define CPM_CR_ENET_SBLOCK CPM_CR_SCC3_SBLOCK
	# define CMXSCR_MASK (CMXSCR_SC3 \|\
	CMXSCR_RS3CS_MSK \|\
	CMXSCR_TS3CS_MSK)
	#elif (CONFIG_ETHER_INDEX == 4)
	# define PROFF_ENET PROFF_SCC4
	# define CPM_CR_ENET_PAGE CPM_CR_SCC4_PAGE
	# define CPM_CR_ENET_SBLOCK CPM_CR_SCC4_SBLOCK
	# define CMXSCR_MASK (CMXSCR_SC4 \|\
	CMXSCR_RS4CS_MSK \|\
	CMXSCR_TS4CS_MSK)

	#endif


	/* Ethernet Transmit and Receive Buffers */
	#define DBUF_LENGTH 1520

	#define TX_BUF_CNT 2

	#define TOUT_LOOP 1000000

	static char txbuf[TX_BUF_CNT][ DBUF_LENGTH ];

	static uint rxIdx; /* index of the current RX buffer */
	static uint txIdx; /* index of the current TX buffer */

	/*
	* SCC Ethernet Tx and Rx buffer descriptors allocated at the
	* immr->udata_bd address on Dual-Port RAM
	* Provide for Double Buffering
	*/

	typedef volatile struct CommonBufferDescriptor {
	cbd_t rxbd[PKTBUFSRX]; /* Rx BD */
	cbd_t txbd[TX_BUF_CNT]; /* Tx BD */
	} RTXBD;

	static RTXBD *rtx;


	int eth_send(volatile void *packet, int length)
	{
	int i;
	int result = 0;

	if (length <= 0) {
	printf("scc: bad packet size: %d\n", length);
	goto out;
	}

	for(i=0; rtx->txbd[txIdx].cbd_sc & BD_ENET_TX_READY; i++) {
	if (i >= TOUT_LOOP) {
	puts ("scc: tx buffer not ready\n");
	goto out;
	}
	}

	rtx->txbd[txIdx].cbd_bufaddr = (uint)packet;
	rtx->txbd[txIdx].cbd_datlen = length;
	rtx->txbd[txIdx].cbd_sc \|= (BD_ENET_TX_READY \| BD_ENET_TX_LAST \|
	BD_ENET_TX_WRAP);

	for(i=0; rtx->txbd[txIdx].cbd_sc & BD_ENET_TX_READY; i++) {
	if (i >= TOUT_LOOP) {
	puts ("scc: tx error\n");
	goto out;
	}
	}

	/* return only status bits */
	result = rtx->txbd[txIdx].cbd_sc & BD_ENET_TX_STATS;

	out:
	return result;
	}


	int eth_rx(void)
	{
	int length;

	for (;;)
	{
	if (rtx->rxbd[rxIdx].cbd_sc & BD_ENET_RX_EMPTY) {
	length = -1;
	break; /* nothing received - leave for() loop */
	}

	length = rtx->rxbd[rxIdx].cbd_datlen;

	if (rtx->rxbd[rxIdx].cbd_sc & 0x003f)
	{
	printf("err: %x\n", rtx->rxbd[rxIdx].cbd_sc);
	}
	else
	{
	/* Pass the packet up to the protocol layers. */
	NetReceive(NetRxPackets[rxIdx], length - 4);
	}


	/* Give the buffer back to the SCC. */
	rtx->rxbd[rxIdx].cbd_datlen = 0;

	/* wrap around buffer index when necessary */
	if ((rxIdx + 1) >= PKTBUFSRX) {
	rtx->rxbd[PKTBUFSRX - 1].cbd_sc = (BD_ENET_RX_WRAP \|
	BD_ENET_RX_EMPTY);
	rxIdx = 0;
	}
	else {
	rtx->rxbd[rxIdx].cbd_sc = BD_ENET_RX_EMPTY;
	rxIdx++;
	}
	}
	return length;
	}

	/**************************************************************
	*
	* SCC Ethernet Initialization Routine
	*
	*************************************************************/

	int eth_init(bd_t *bis)
	{
	int i;
	volatile immap_t immr = (immap_t )CFG_IMMR;
	scc_enet_t *pram_ptr;
	uint dpaddr;

	rxIdx = 0;
	txIdx = 0;

	/* assign static pointer to BD area */
	dpaddr = m8260_cpm_dpalloc(sizeof(RTXBD) + 2, 16);
	rtx = (RTXBD *)&immr->im_dprambase[dpaddr];

	/* 24.21 - (1-3): ioports have been set up already */

	/* 24.21 - (4,5): connect SCC's tx and rx clocks, use NMSI for SCC */
	immr->im_cpmux.cmx_uar = 0;
	immr->im_cpmux.cmx_scr = ( (immr->im_cpmux.cmx_scr & ~CMXSCR_MASK) \|
	CFG_CMXSCR_VALUE);


	/* 24.21 (6) write RBASE and TBASE to parameter RAM */
	pram_ptr = (scc_enet_t *)&(immr->im_dprambase[PROFF_ENET]);
	pram_ptr->sen_genscc.scc_rbase = (unsigned int)(&rtx->rxbd[0]);
	pram_ptr->sen_genscc.scc_tbase = (unsigned int)(&rtx->txbd[0]);

	pram_ptr->sen_genscc.scc_rfcr = 0x18; /* Nrml Ops and Mot byte ordering */
	pram_ptr->sen_genscc.scc_tfcr = 0x18; /* Mot byte ordering, Nrml access */

	pram_ptr->sen_genscc.scc_mrblr = DBUF_LENGTH; /* max. package len 1520 */

	pram_ptr->sen_cpres = ~(0x0); /* Preset CRC */
	pram_ptr->sen_cmask = 0xdebb20e3; /* Constant Mask for CRC */


	/* 24.21 - (7): Write INIT RX AND TX PARAMETERS to CPCR */
	while(immr->im_cpm.cp_cpcr & CPM_CR_FLG);
	immr->im_cpm.cp_cpcr = mk_cr_cmd(CPM_CR_ENET_PAGE,
	CPM_CR_ENET_SBLOCK,
	0x0c,
	CPM_CR_INIT_TRX) \| CPM_CR_FLG;

	/* 24.21 - (8-18): Set up parameter RAM */
	pram_ptr->sen_crcec = 0x0; /* Error Counter CRC (unused) */
	pram_ptr->sen_alec = 0x0; /* Align Error Counter (unused) */
	pram_ptr->sen_disfc = 0x0; /* Discard Frame Counter (unused) */

	pram_ptr->sen_pads = 0x8888; /* Short Frame PAD Characters */

	pram_ptr->sen_retlim = 15; /* Retry Limit Threshold */

	pram_ptr->sen_maxflr = 1518; /* MAX Frame Length Register */
	pram_ptr->sen_minflr = 64; /* MIN Frame Length Register */

	pram_ptr->sen_maxd1 = DBUF_LENGTH; /* MAX DMA1 Length Register */
	pram_ptr->sen_maxd2 = DBUF_LENGTH; /* MAX DMA2 Length Register */

	pram_ptr->sen_gaddr1 = 0x0; /* Group Address Filter 1 (unused) */
	pram_ptr->sen_gaddr2 = 0x0; /* Group Address Filter 2 (unused) */
	pram_ptr->sen_gaddr3 = 0x0; /* Group Address Filter 3 (unused) */
	pram_ptr->sen_gaddr4 = 0x0; /* Group Address Filter 4 (unused) */

	# define ea bis->bi_enetaddr
	pram_ptr->sen_paddrh = (ea[5] << 8) + ea[4];
	pram_ptr->sen_paddrm = (ea[3] << 8) + ea[2];
	pram_ptr->sen_paddrl = (ea[1] << 8) + ea[0];
	# undef ea

	pram_ptr->sen_pper = 0x0; /* Persistence (unused) */

	pram_ptr->sen_iaddr1 = 0x0; /* Individual Address Filter 1 (unused) */
	pram_ptr->sen_iaddr2 = 0x0; /* Individual Address Filter 2 (unused) */
	pram_ptr->sen_iaddr3 = 0x0; /* Individual Address Filter 3 (unused) */
	pram_ptr->sen_iaddr4 = 0x0; /* Individual Address Filter 4 (unused) */

	pram_ptr->sen_taddrh = 0x0; /* Tmp Address (MSB) (unused) */
	pram_ptr->sen_taddrm = 0x0; /* Tmp Address (unused) */
	pram_ptr->sen_taddrl = 0x0; /* Tmp Address (LSB) (unused) */


	/* 24.21 - (19): Initialize RxBD */
	for (i = 0; i < PKTBUFSRX; i++)
	{
	rtx->rxbd[i].cbd_sc = BD_ENET_RX_EMPTY;
	rtx->rxbd[i].cbd_datlen = 0; /* Reset */
	rtx->rxbd[i].cbd_bufaddr = (uint)NetRxPackets[i];
	}

	rtx->rxbd[PKTBUFSRX - 1].cbd_sc \|= BD_ENET_RX_WRAP;

	/* 24.21 - (20): Initialize TxBD */
	for (i = 0; i < TX_BUF_CNT; i++)
	{
	rtx->txbd[i].cbd_sc = (BD_ENET_TX_PAD \|
	BD_ENET_TX_LAST \|
	BD_ENET_TX_TC);
	rtx->txbd[i].cbd_datlen = 0; /* Reset */
	rtx->txbd[i].cbd_bufaddr = (uint)&txbuf[i][0];
	}

	rtx->txbd[TX_BUF_CNT - 1].cbd_sc \|= BD_ENET_TX_WRAP;

	/* 24.21 - (21): Write 0xffff to SCCE */
	immr->im_scc[CONFIG_ETHER_INDEX-1].scc_scce = ~(0x0);

	/* 24.21 - (22): Write to SCCM to enable TXE, RXF, TXB events */
	immr->im_scc[CONFIG_ETHER_INDEX-1].scc_sccm = (SCCE_ENET_TXE \|
	SCCE_ENET_RXF \|
	SCCE_ENET_TXB);

	/* 24.21 - (23): we don't use ethernet interrupts */

	/* 24.21 - (24): Clear GSMR_H to enable normal operations */
	immr->im_scc[CONFIG_ETHER_INDEX-1].scc_gsmrh = 0;

	/* 24.21 - (25): Clear GSMR_L to enable normal operations */
	immr->im_scc[CONFIG_ETHER_INDEX-1].scc_gsmrl = (SCC_GSMRL_TCI \|
	SCC_GSMRL_TPL_48 \|
	SCC_GSMRL_TPP_10 \|
	SCC_GSMRL_MODE_ENET);

	/* 24.21 - (26): Initialize DSR */
	immr->im_scc[CONFIG_ETHER_INDEX-1].scc_dsr = 0xd555;

	/* 24.21 - (27): Initialize PSMR2
	*
	* Settings:
	* CRC = 32-Bit CCITT
	* NIB = Begin searching for SFD 22 bits after RENA
	* FDE = Full Duplex Enable
	* BRO = Reject broadcast packets
	* PROMISCOUS = Catch all packets regardless of dest. MAC adress
	*/
	immr->im_scc[CONFIG_ETHER_INDEX-1].scc_psmr = SCC_PSMR_ENCRC \|
	SCC_PSMR_NIB22 \|
	#if defined(CONFIG_SCC_ENET_FULL_DUPLEX)
	SCC_PSMR_FDE \|
	#endif
	#if defined(CONFIG_SCC_ENET_NO_BROADCAST)
	SCC_PSMR_BRO \|
	#endif
	#if defined(CONFIG_SCC_ENET_PROMISCOUS)
	SCC_PSMR_PRO \|
	#endif
	0;

	/* 24.21 - (28): Write to GSMR_L to enable SCC */
	immr->im_scc[CONFIG_ETHER_INDEX-1].scc_gsmrl \|= (SCC_GSMRL_ENR \|
	SCC_GSMRL_ENT);

	return 0;
	}


	void eth_halt(void)
	{
	volatile immap_t immr = (immap_t )CFG_IMMR;
	immr->im_scc[CONFIG_ETHER_INDEX-1].scc_gsmrl &= ~(SCC_GSMRL_ENR \|
	SCC_GSMRL_ENT);
	}

	#if 0
	void restart(void)
	{
	volatile immap_t immr = (immap_t )CFG_IMMR;
	immr->im_cpm.cp_scc[CONFIG_ETHER_INDEX-1].scc_gsmrl \|= (SCC_GSMRL_ENR \|
	SCC_GSMRL_ENT);
	}
	#endif

	#endif /* CONFIG_ETHER_ON_SCC && CFG_CMD_NET */