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u-boot/cpu/mpc8xx/fec.c
wdenk ef1464cc01 * Patch by Anders Larsen, 18 Sep 2003: 
allow mkimage to build and run on Cygwin-hosted systems

* Patch by Frank Müller, 18 Sep 2003:
  use bi_intfreq instead of bi_busfreq to compute fec_mii_speed in
  cpu/mpc8xx/fec.c

* Patch by Pantelis Antoniou, 16 Sep 2003:
  add tool to compute fileds in the PLPRCR register for MPC86x
2003-10-08 22:14:02 +00:00

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/*
* (C) Copyright 2000
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
*
* 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 <malloc.h>
#include <commproc.h>
#include <net.h>
#include <command.h>
#undef ET_DEBUG
#if (CONFIG_COMMANDS & CFG_CMD_NET) && defined(FEC_ENET)
#ifdef CFG_DISCOVER_PHY
#include <miiphy.h>
static void mii_discover_phy(void);
#endif
/* Ethernet Transmit and Receive Buffers */
#define DBUF_LENGTH 1520
#define TX_BUF_CNT 2
#define TOUT_LOOP 100
#define PKT_MAXBUF_SIZE 1518
#define PKT_MINBUF_SIZE 64
#define PKT_MAXBLR_SIZE 1520
static char txbuf[DBUF_LENGTH];
static uint rxIdx; /* index of the current RX buffer */
static uint txIdx; /* index of the current TX buffer */
/*
* FEC 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 = NULL;
static int fec_send(struct eth_device* dev, volatile void *packet, int length);
static int fec_recv(struct eth_device* dev);
static int fec_init(struct eth_device* dev, bd_t * bd);
static void fec_halt(struct eth_device* dev);
int fec_initialize(bd_t *bis)
{
struct eth_device* dev;
dev = (struct eth_device*) malloc(sizeof *dev);
memset(dev, 0, sizeof *dev);
sprintf(dev->name, "FEC ETHERNET");
dev->iobase = 0;
dev->priv = 0;
dev->init = fec_init;
dev->halt = fec_halt;
dev->send = fec_send;
dev->recv = fec_recv;
eth_register(dev);
return 1;
}
static int fec_send(struct eth_device* dev, volatile void *packet, int length)
{
int j, rc;
volatile immap_t *immr = (immap_t *) CFG_IMMR;
volatile fec_t *fecp = &(immr->im_cpm.cp_fec);
/* section 16.9.23.3
* Wait for ready
*/
j = 0;
while ((rtx->txbd[txIdx].cbd_sc & BD_ENET_TX_READY) && (j<TOUT_LOOP)) {
udelay(1);
j++;
}
if (j>=TOUT_LOOP) {
printf("TX not ready\n");
}
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;
__asm__ ("eieio");
/* Activate transmit Buffer Descriptor polling */
fecp->fec_x_des_active = 0x01000000; /* Descriptor polling active */
j = 0;
while ((rtx->txbd[txIdx].cbd_sc & BD_ENET_TX_READY) && (j<TOUT_LOOP)) {
#if defined(CONFIG_ICU862)
udelay(10);
#else
udelay(1);
#endif
j++;
}
if (j>=TOUT_LOOP) {
printf("TX timeout\n");
}
#ifdef ET_DEBUG
printf("%s[%d] %s: cycles: %d status: %x retry cnt: %d\n",
__FILE__,__LINE__,__FUNCTION__,j,rtx->txbd[txIdx].cbd_sc,
(rtx->txbd[txIdx].cbd_sc & 0x003C)>>2);
#endif
/* return only status bits */;
rc = (rtx->txbd[txIdx].cbd_sc & BD_ENET_TX_STATS);
txIdx = (txIdx + 1) % TX_BUF_CNT;
return rc;
}
static int fec_recv(struct eth_device* dev)
{
int length;
volatile immap_t *immr = (immap_t *) CFG_IMMR;
volatile fec_t *fecp = &(immr->im_cpm.cp_fec);
for (;;) {
/* section 16.9.23.2 */
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) {
#ifdef ET_DEBUG
printf("%s[%d] err: %x\n",
__FUNCTION__,__LINE__,rtx->rxbd[rxIdx].cbd_sc);
#endif
} else {
/* Pass the packet up to the protocol layers. */
NetReceive(NetRxPackets[rxIdx], length - 4);
}
/* Give the buffer back to the FEC. */
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++;
}
__asm__ ("eieio");
/* Try to fill Buffer Descriptors */
fecp->fec_r_des_active = 0x01000000; /* Descriptor polling active */
}
return length;
}
/**************************************************************
*
* FEC Ethernet Initialization Routine
*
*************************************************************/
#define FEC_ECNTRL_PINMUX 0x00000004
#define FEC_ECNTRL_ETHER_EN 0x00000002
#define FEC_ECNTRL_RESET 0x00000001
#define FEC_RCNTRL_BC_REJ 0x00000010
#define FEC_RCNTRL_PROM 0x00000008
#define FEC_RCNTRL_MII_MODE 0x00000004
#define FEC_RCNTRL_DRT 0x00000002
#define FEC_RCNTRL_LOOP 0x00000001
#define FEC_TCNTRL_FDEN 0x00000004
#define FEC_TCNTRL_HBC 0x00000002
#define FEC_TCNTRL_GTS 0x00000001
#define FEC_RESET_DELAY 50
static int fec_init(struct eth_device* dev, bd_t * bd)
{
int i;
volatile immap_t *immr = (immap_t *) CFG_IMMR;
volatile fec_t *fecp = &(immr->im_cpm.cp_fec);
#if defined(CONFIG_FADS) && \
( defined(CONFIG_MPC860T) || defined(CONFIG_MPC866_et_al) )
/* configure FADS for fast (FEC) ethernet, half-duplex */
/* The LXT970 needs about 50ms to recover from reset, so
* wait for it by discovering the PHY before leaving eth_init().
*/
{
volatile uint *bcsr4 = (volatile uint *) BCSR4;
*bcsr4 = (*bcsr4 & ~(BCSR4_FETH_EN | BCSR4_FETHCFG1))
| (BCSR4_FETHCFG0 | BCSR4_FETHFDE | BCSR4_FETHRST);
/* reset the LXT970 PHY */
*bcsr4 &= ~BCSR4_FETHRST;
udelay (10);
*bcsr4 |= BCSR4_FETHRST;
udelay (10);
}
#endif
/* Whack a reset.
* A delay is required between a reset of the FEC block and
* initialization of other FEC registers because the reset takes
* some time to complete. If you don't delay, subsequent writes
* to FEC registers might get killed by the reset routine which is
* still in progress.
*/
fecp->fec_ecntrl = FEC_ECNTRL_PINMUX | FEC_ECNTRL_RESET;
for (i = 0;
(fecp->fec_ecntrl & FEC_ECNTRL_RESET) && (i < FEC_RESET_DELAY);
++i) {
udelay (1);
}
if (i == FEC_RESET_DELAY) {
printf ("FEC_RESET_DELAY timeout\n");
return 0;
}
/* We use strictly polling mode only
*/
fecp->fec_imask = 0;
/* Clear any pending interrupt
*/
fecp->fec_ievent = 0xffc0;
/* No need to set the IVEC register */
/* Set station address
*/
#define ea eth_get_dev()->enetaddr
fecp->fec_addr_low = (ea[0] << 24) | (ea[1] << 16) |
(ea[2] << 8) | (ea[3] ) ;
fecp->fec_addr_high = (ea[4] << 8) | (ea[5] ) ;
#undef ea
/* Clear multicast address hash table
*/
fecp->fec_hash_table_high = 0;
fecp->fec_hash_table_low = 0;
/* Set maximum receive buffer size.
*/
fecp->fec_r_buff_size = PKT_MAXBLR_SIZE;
/* Set maximum frame length
*/
fecp->fec_r_hash = PKT_MAXBUF_SIZE;
/*
* Setup Buffers and Buffer Desriptors
*/
rxIdx = 0;
txIdx = 0;
if (!rtx) {
#ifdef CFG_ALLOC_DPRAM
rtx = (RTXBD *) (immr->im_cpm.cp_dpmem + dpram_alloc_align(sizeof(RTXBD),8));
#else
rtx = (RTXBD *) (immr->im_cpm.cp_dpmem + CPM_FEC_BASE);
#endif
}
/*
* Setup Receiver Buffer Descriptors (13.14.24.18)
* Settings:
* Empty, Wrap
*/
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;
/*
* Setup Ethernet Transmitter Buffer Descriptors (13.14.24.19)
* Settings:
* Last, Tx CRC
*/
for (i = 0; i < TX_BUF_CNT; i++) {
rtx->txbd[i].cbd_sc = BD_ENET_TX_LAST | BD_ENET_TX_TC;
rtx->txbd[i].cbd_datlen = 0; /* Reset */
rtx->txbd[i].cbd_bufaddr = (uint) (&txbuf[0]);
}
rtx->txbd[TX_BUF_CNT - 1].cbd_sc |= BD_ENET_TX_WRAP;
/* Set receive and transmit descriptor base
*/
fecp->fec_r_des_start = (unsigned int) (&rtx->rxbd[0]);
fecp->fec_x_des_start = (unsigned int) (&rtx->txbd[0]);
/* Enable MII mode
*/
#if 0 /* Full duplex mode */
fecp->fec_r_cntrl = FEC_RCNTRL_MII_MODE;
fecp->fec_x_cntrl = FEC_TCNTRL_FDEN;
#else /* Half duplex mode */
fecp->fec_r_cntrl = FEC_RCNTRL_MII_MODE | FEC_RCNTRL_DRT;
fecp->fec_x_cntrl = 0;
#endif
/* Enable big endian and don't care about SDMA FC.
*/
fecp->fec_fun_code = 0x78000000;
/* Set MII speed to 2.5 MHz or slightly below.
* According to the MPC860T (Rev. D) Fast ethernet controller user
* manual (6.2.14),
* the MII management interface clock must be less than or equal
* to 2.5 MHz.
* This MDC frequency is equal to system clock / (2 * MII_SPEED).
* Then MII_SPEED = system_clock / 2 * 2,5 Mhz.
*/
fecp->fec_mii_speed = ((bd->bi_intfreq + 4999999) / 5000000) << 1;
#if !defined(CONFIG_ICU862) && !defined(CONFIG_IAD210)
/* Configure all of port D for MII.
*/
immr->im_ioport.iop_pdpar = 0x1fff;
/* Bits moved from Rev. D onward */
if ((get_immr (0) & 0xffff) < 0x0501) {
immr->im_ioport.iop_pddir = 0x1c58; /* Pre rev. D */
} else {
immr->im_ioport.iop_pddir = 0x1fff; /* Rev. D and later */
}
#else
/* Configure port A for MII.
*/
#if defined(CONFIG_ICU862) && defined(CFG_DISCOVER_PHY)
/* On the ICU862 board the MII-MDC pin is routed to PD8 pin
* of CPU, so for this board we need to configure Utopia and
* enable PD8 to MII-MDC function */
immr->im_ioport.iop_pdpar |= 0x4080;
#endif
/* Has Utopia been configured? */
if (immr->im_ioport.iop_pdpar & (0x8000 >> 1)) {
/*
* YES - Use MUXED mode for UTOPIA bus.
* This frees Port A for use by MII (see 862UM table 41-6).
*/
immr->im_ioport.utmode &= ~0x80;
} else {
/*
* NO - set SPLIT mode for UTOPIA bus.
*
* This doesn't really effect UTOPIA (which isn't
* enabled anyway) but just tells the 862
* to use port A for MII (see 862UM table 41-6).
*/
immr->im_ioport.utmode |= 0x80;
}
#endif /* !defined(CONFIG_ICU862) */
rxIdx = 0;
txIdx = 0;
/* Now enable the transmit and receive processing
*/
fecp->fec_ecntrl = FEC_ECNTRL_PINMUX | FEC_ECNTRL_ETHER_EN;
#ifdef CFG_DISCOVER_PHY
/* wait for the PHY to wake up after reset
*/
mii_discover_phy();
#endif
/* And last, try to fill Rx Buffer Descriptors */
fecp->fec_r_des_active = 0x01000000; /* Descriptor polling active */
return 1;
}
static void fec_halt(struct eth_device* dev)
{
#if 0
volatile immap_t *immr = (immap_t *)CFG_IMMR;
immr->im_cpm.cp_scc[SCC_ENET].scc_gsmrl &= ~(SCC_GSMRL_ENR | SCC_GSMRL_ENT);
#endif
}
#if 0
void restart(void)
{
volatile immap_t *immr = (immap_t *)CFG_IMMR;
immr->im_cpm.cp_scc[SCC_ENET].scc_gsmrl |= (SCC_GSMRL_ENR | SCC_GSMRL_ENT);
}
#endif
#if defined(CFG_DISCOVER_PHY) || (CONFIG_COMMANDS & CFG_CMD_MII)
static int phyaddr = -1; /* didn't find a PHY yet */
static uint phytype;
/* Make MII read/write commands for the FEC.
*/
#define mk_mii_read(ADDR, REG) (0x60020000 | ((ADDR << 23) | \
(REG & 0x1f) << 18))
#define mk_mii_write(ADDR, REG, VAL) (0x50020000 | ((ADDR << 23) | \
(REG & 0x1f) << 18) | \
(VAL & 0xffff))
/* Interrupt events/masks.
*/
#define FEC_ENET_HBERR ((uint)0x80000000) /* Heartbeat error */
#define FEC_ENET_BABR ((uint)0x40000000) /* Babbling receiver */
#define FEC_ENET_BABT ((uint)0x20000000) /* Babbling transmitter */
#define FEC_ENET_GRA ((uint)0x10000000) /* Graceful stop complete */
#define FEC_ENET_TXF ((uint)0x08000000) /* Full frame transmitted */
#define FEC_ENET_TXB ((uint)0x04000000) /* A buffer was transmitted */
#define FEC_ENET_RXF ((uint)0x02000000) /* Full frame received */
#define FEC_ENET_RXB ((uint)0x01000000) /* A buffer was received */
#define FEC_ENET_MII ((uint)0x00800000) /* MII interrupt */
#define FEC_ENET_EBERR ((uint)0x00400000) /* SDMA bus error */
/* PHY identification
*/
#define PHY_ID_LXT970 0x78100000 /* LXT970 */
#define PHY_ID_LXT971 0x001378e0 /* LXT971 and 972 */
#define PHY_ID_82555 0x02a80150 /* Intel 82555 */
#define PHY_ID_QS6612 0x01814400 /* QS6612 */
#define PHY_ID_AMD79C784 0x00225610 /* AMD 79C784 */
#define PHY_ID_LSI80225 0x0016f870 /* LSI 80225 */
#define PHY_ID_LSI80225B 0x0016f880 /* LSI 80225/B */
/* send command to phy using mii, wait for result */
static uint
mii_send(uint mii_cmd)
{
uint mii_reply;
volatile fec_t *ep;
ep = &(((immap_t *)CFG_IMMR)->im_cpm.cp_fec);
ep->fec_mii_data = mii_cmd; /* command to phy */
/* wait for mii complete */
while (!(ep->fec_ievent & FEC_ENET_MII))
; /* spin until done */
mii_reply = ep->fec_mii_data; /* result from phy */
ep->fec_ievent = FEC_ENET_MII; /* clear MII complete */
#if 0
printf("%s[%d] %s: sent=0x%8.8x, reply=0x%8.8x\n",
__FILE__,__LINE__,__FUNCTION__,mii_cmd,mii_reply);
#endif
return (mii_reply & 0xffff); /* data read from phy */
}
#endif /* CFG_DISCOVER_PHY || (CONFIG_COMMANDS & CFG_CMD_MII) */
#if defined(CFG_DISCOVER_PHY)
static void
mii_discover_phy(void)
{
#define MAX_PHY_PASSES 11
uint phyno;
int pass;
phyaddr = -1; /* didn't find a PHY yet */
for (pass = 1; pass <= MAX_PHY_PASSES && phyaddr < 0; ++pass) {
if (pass > 1) {
/* PHY may need more time to recover from reset.
* The LXT970 needs 50ms typical, no maximum is
* specified, so wait 10ms before try again.
* With 11 passes this gives it 100ms to wake up.
*/
udelay(10000); /* wait 10ms */
}
for (phyno = 0; phyno < 32 && phyaddr < 0; ++phyno) {
phytype = mii_send(mk_mii_read(phyno, PHY_PHYIDR1));
#ifdef ET_DEBUG
printf("PHY type 0x%x pass %d type ", phytype, pass);
#endif
if (phytype != 0xffff) {
phyaddr = phyno;
phytype <<= 16;
phytype |= mii_send(mk_mii_read(phyno,
PHY_PHYIDR2));
#ifdef ET_DEBUG
printf("PHY @ 0x%x pass %d type ",phyno,pass);
switch (phytype & 0xfffffff0) {
case PHY_ID_LXT970:
printf("LXT970\n");
break;
case PHY_ID_LXT971:
printf("LXT971\n");
break;
case PHY_ID_82555:
printf("82555\n");
break;
case PHY_ID_QS6612:
printf("QS6612\n");
break;
case PHY_ID_AMD79C784:
printf("AMD79C784\n");
break;
case PHY_ID_LSI80225B:
printf("LSI L80225/B\n");
break;
default:
printf("0x%08x\n", phytype);
break;
}
#endif
}
}
}
if (phyaddr < 0) {
printf("No PHY device found.\n");
}
}
#endif /* CFG_DISCOVER_PHY */
#if (CONFIG_COMMANDS & CFG_CMD_MII) && !defined(CONFIG_BITBANGMII)
static int mii_init_done = 0;
/****************************************************************************
* mii_init -- Initialize the MII for MII command without ethernet
* This function is a subset of eth_init
****************************************************************************
*/
void mii_init (void)
{
DECLARE_GLOBAL_DATA_PTR;
bd_t *bd = gd->bd;
volatile immap_t *immr = (immap_t *) CFG_IMMR;
volatile fec_t *fecp = &(immr->im_cpm.cp_fec);
int i;
if (mii_init_done != 0) {
return;
}
/* Whack a reset.
* A delay is required between a reset of the FEC block and
* initialization of other FEC registers because the reset takes
* some time to complete. If you don't delay, subsequent writes
* to FEC registers might get killed by the reset routine which is
* still in progress.
*/
fecp->fec_ecntrl = FEC_ECNTRL_PINMUX | FEC_ECNTRL_RESET;
for (i = 0;
(fecp->fec_ecntrl & FEC_ECNTRL_RESET) && (i < FEC_RESET_DELAY);
++i) {
udelay (1);
}
if (i == FEC_RESET_DELAY) {
printf ("FEC_RESET_DELAY timeout\n");
return;
}
/* We use strictly polling mode only
*/
fecp->fec_imask = 0;
/* Clear any pending interrupt
*/
fecp->fec_ievent = 0xffc0;
/* Set MII speed to 2.5 MHz or slightly below.
* According to the MPC860T (Rev. D) Fast ethernet controller user
* manual (6.2.14),
* the MII management interface clock must be less than or equal
* to 2.5 MHz.
* This MDC frequency is equal to system clock / (2 * MII_SPEED).
* Then MII_SPEED = system_clock / 2 * 2,5 Mhz.
*/
fecp->fec_mii_speed = ((bd->bi_intfreq + 4999999) / 5000000) << 1;
#if !defined(CONFIG_ICU862) && !defined(CONFIG_IAD210)
/* Configure all of port D for MII.
*/
immr->im_ioport.iop_pdpar = 0x1fff;
/* Bits moved from Rev. D onward */
if ((get_immr (0) & 0xffff) < 0x0501) {
immr->im_ioport.iop_pddir = 0x1c58; /* Pre rev. D */
} else {
immr->im_ioport.iop_pddir = 0x1fff; /* Rev. D and later */
}
#else
/* Configure port A for MII.
*/
#if defined(CONFIG_ICU862)
/* On the ICU862 board the MII-MDC pin is routed to PD8 pin
* of CPU, so for this board we need to configure Utopia and
* enable PD8 to MII-MDC function */
immr->im_ioport.iop_pdpar |= 0x4080;
#endif
/* Has Utopia been configured? */
if (immr->im_ioport.iop_pdpar & (0x8000 >> 1)) {
/*
* YES - Use MUXED mode for UTOPIA bus.
* This frees Port A for use by MII (see 862UM table 41-6).
*/
immr->im_ioport.utmode &= ~0x80;
} else {
/*
* NO - set SPLIT mode for UTOPIA bus.
*
* This doesn't really effect UTOPIA (which isn't
* enabled anyway) but just tells the 862
* to use port A for MII (see 862UM table 41-6).
*/
immr->im_ioport.utmode |= 0x80;
}
#endif /* !defined(CONFIG_ICU862) */
/* Now enable the transmit and receive processing
*/
fecp->fec_ecntrl = FEC_ECNTRL_PINMUX | FEC_ECNTRL_ETHER_EN;
mii_init_done = 1;
}
/*****************************************************************************
* Read and write a MII PHY register, routines used by MII Utilities
*
* FIXME: These routines are expected to return 0 on success, but mii_send
* does _not_ return an error code. Maybe 0xFFFF means error, i.e.
* no PHY connected...
* For now always return 0.
* FIXME: These routines only work after calling eth_init() at least once!
* Otherwise they hang in mii_send() !!! Sorry!
*****************************************************************************/
int miiphy_read(unsigned char addr, unsigned char reg, unsigned short *value)
{
short rdreg; /* register working value */
#ifdef MII_DEBUG
printf ("miiphy_read(0x%x) @ 0x%x = ", reg, addr);
#endif
rdreg = mii_send(mk_mii_read(addr, reg));
*value = rdreg;
#ifdef MII_DEBUG
printf ("0x%04x\n", *value);
#endif
return 0;
}
int miiphy_write(unsigned char addr, unsigned char reg, unsigned short value)
{
short rdreg; /* register working value */
#ifdef MII_DEBUG
printf ("miiphy_write(0x%x) @ 0x%x = ", reg, addr);
#endif
rdreg = mii_send(mk_mii_write(addr, reg, value));
#ifdef MII_DEBUG
printf ("0x%04x\n", value);
#endif
return 0;
}
#endif /* (CONFIG_COMMANDS & CFG_CMD_MII) && !defined(CONFIG_BITBANGMII)*/
#endif /* CFG_CMD_NET, FEC_ENET */
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