cpu/ppc4xx/miiphy.c - uboot/qsr1000 - Git at Google

 /*-----------------------------------------------------------------------------+
   |
   |	  This source code has been made available to you by IBM on an AS-IS
   |	  basis.  Anyone receiving this source is licensed under IBM
   |	  copyrights to use it in any way he or she deems fit, including
   |	  copying it, modifying it, compiling it, and redistributing it either
   |	  with or without modifications.  No license under IBM patents or
   |	  patent applications is to be implied by the copyright license.
   |
   |	  Any user of this software should understand that IBM cannot provide
   |	  technical support for this software and will not be responsible for
   |	  any consequences resulting from the use of this software.
   |
   |	  Any person who transfers this source code or any derivative work
   |	  must include the IBM copyright notice, this paragraph, and the
   |	  preceding two paragraphs in the transferred software.
   |
   |	  COPYRIGHT   I B M   CORPORATION 1995
   |	  LICENSED MATERIAL  -	PROGRAM PROPERTY OF I B M
   +-----------------------------------------------------------------------------*/
 /*-----------------------------------------------------------------------------+
   |
   |  File Name:	 miiphy.c
   |
   |  Function:	 This module has utilities for accessing the MII PHY through
   |	       the EMAC3 macro.
   |
   |  Author:	 Mark Wisner
   |
   +-----------------------------------------------------------------------------*/

 /* define DEBUG for debugging output (obviously ;-)) */
 #if 0
 #define DEBUG
 #endif

 #include <common.h>
 #include <asm/processor.h>
 #include <asm/io.h>
 #include <ppc_asm.tmpl>
 #include <commproc.h>
 #include <ppc4xx_enet.h>
 #include <405_mal.h>
 #include <miiphy.h>

 #if !defined(CONFIG_PHY_CLK_FREQ)
 #define CONFIG_PHY_CLK_FREQ	0
 #endif

 /***********************************************************/
 /* Dump out to the screen PHY regs			   */
 /***********************************************************/

 void miiphy_dump (char *devname, unsigned char addr)
 {
 	unsigned long i;
 	unsigned short data;

 	for (i = 0; i < 0x1A; i++) {
 		if (miiphy_read (devname, addr, i, &data)) {
 			printf ("read error for reg %lx\n", i);
 			return;
 		}
 		printf ("Phy reg %lx ==> %4x\n", i, data);

 		/* jump to the next set of regs */
 		if (i == 0x07)
 			i = 0x0f;

 	}			/* end for loop */
 }				/* end dump */

 /***********************************************************/
 /* (Re)start autonegotiation				   */
 /***********************************************************/
 int phy_setup_aneg (char *devname, unsigned char addr)
 {
 	u16 bmcr;

 #if defined(CONFIG_PHY_DYNAMIC_ANEG)
 	/*
 	 * Set up advertisement based on capablilities reported by the PHY.
 	 * This should work for both copper and fiber.
 	 */
 	u16 bmsr;
 #if defined(CONFIG_PHY_GIGE)
 	u16 exsr = 0x0000;
 #endif

 	miiphy_read (devname, addr, PHY_BMSR, &bmsr);

 #if defined(CONFIG_PHY_GIGE)
 	if (bmsr & PHY_BMSR_EXT_STAT)
 		miiphy_read (devname, addr, PHY_EXSR, &exsr);

 	if (exsr & (PHY_EXSR_1000XF | PHY_EXSR_1000XH)) {
 		/* 1000BASE-X */
 		u16 anar = 0x0000;

 		if (exsr & PHY_EXSR_1000XF)
 			anar |= PHY_X_ANLPAR_FD;

 		if (exsr & PHY_EXSR_1000XH)
 			anar |= PHY_X_ANLPAR_HD;

 		miiphy_write (devname, addr, PHY_ANAR, anar);
 	} else
 #endif
 	{
 		u16 anar, btcr;

 		miiphy_read (devname, addr, PHY_ANAR, &anar);
 		anar &= ~(0x5000 | PHY_ANLPAR_T4 | PHY_ANLPAR_TXFD |
 			  PHY_ANLPAR_TX | PHY_ANLPAR_10FD | PHY_ANLPAR_10);

 		miiphy_read (devname, addr, PHY_1000BTCR, &btcr);
 		btcr &= ~(0x00FF | PHY_1000BTCR_1000FD | PHY_1000BTCR_1000HD);

 		if (bmsr & PHY_BMSR_100T4)
 			anar |= PHY_ANLPAR_T4;

 		if (bmsr & PHY_BMSR_100TXF)
 			anar |= PHY_ANLPAR_TXFD;

 		if (bmsr & PHY_BMSR_100TXH)
 			anar |= PHY_ANLPAR_TX;

 		if (bmsr & PHY_BMSR_10TF)
 			anar |= PHY_ANLPAR_10FD;

 		if (bmsr & PHY_BMSR_10TH)
 			anar |= PHY_ANLPAR_10;

 		miiphy_write (devname, addr, PHY_ANAR, anar);

 #if defined(CONFIG_PHY_GIGE)
 		if (exsr & PHY_EXSR_1000TF)
 			btcr |= PHY_1000BTCR_1000FD;

 		if (exsr & PHY_EXSR_1000TH)
 			btcr |= PHY_1000BTCR_1000HD;

 		miiphy_write (devname, addr, PHY_1000BTCR, btcr);
 #endif
 	}

 #else /* defined(CONFIG_PHY_DYNAMIC_ANEG) */
 	/*
 	 * Set up standard advertisement
 	 */
 	u16 adv;

 	miiphy_read (devname, addr, PHY_ANAR, &adv);
 	adv |= (PHY_ANLPAR_ACK  | PHY_ANLPAR_TXFD | PHY_ANLPAR_TX |
 		PHY_ANLPAR_10FD | PHY_ANLPAR_10);
 	miiphy_write (devname, addr, PHY_ANAR, adv);

 	miiphy_read (devname, addr, PHY_1000BTCR, &adv);
 	adv |= (0x0300);
 	miiphy_write (devname, addr, PHY_1000BTCR, adv);

 #endif /* defined(CONFIG_PHY_DYNAMIC_ANEG) */

 	/* Start/Restart aneg */
 	miiphy_read (devname, addr, PHY_BMCR, &bmcr);
 	bmcr |= (PHY_BMCR_AUTON | PHY_BMCR_RST_NEG);
 	miiphy_write (devname, addr, PHY_BMCR, bmcr);

 	return 0;
 }

 /***********************************************************/
 /* read a phy reg and return the value with a rc	   */
 /***********************************************************/
 /* AMCC_TODO:
  * Find out of the choice for the emac for MDIO is from the bridges,
  * i.e. ZMII or RGMII as approporiate.  If the bridges are not used
  * to determine the emac for MDIO, then is the SDR0_ETH_CFG[MDIO_SEL]
  * used?  If so, then this routine below does not apply to the 460EX/GT.
  *
  * sr: Currently on 460EX only EMAC0 works with MDIO, so we always
  * return EMAC0 offset here
  * vg: For 460EX/460GT if internal GPCS PHY address is specified
  * return appropriate EMAC offset
  */
 unsigned int miiphy_getemac_offset(u8 addr)
 {
 #if (defined(CONFIG_440) && \
     !defined(CONFIG_440SP) && !defined(CONFIG_440SPE) && \
     !defined(CONFIG_460EX) && !defined(CONFIG_460GT)) && \
     defined(CONFIG_NET_MULTI)
 	unsigned long zmii;
 	unsigned long eoffset;

 	/* Need to find out which mdi port we're using */
 	zmii = in_be32((void *)ZMII_FER);

 	if (zmii & (ZMII_FER_MDI << ZMII_FER_V (0)))
 		/* using port 0 */
 		eoffset = 0;

 	else if (zmii & (ZMII_FER_MDI << ZMII_FER_V (1)))
 		/* using port 1 */
 		eoffset = 0x100;

 	else if (zmii & (ZMII_FER_MDI << ZMII_FER_V (2)))
 		/* using port 2 */
 		eoffset = 0x400;

 	else if (zmii & (ZMII_FER_MDI << ZMII_FER_V (3)))
 		/* using port 3 */
 		eoffset = 0x600;

 	else {
 		/* None of the mdi ports are enabled! */
 		/* enable port 0 */
 		zmii |= ZMII_FER_MDI << ZMII_FER_V (0);
 		out_be32((void *)ZMII_FER, zmii);
 		eoffset = 0;
 		/* need to soft reset port 0 */
 		zmii = in_be32((void *)EMAC_M0);
 		zmii |= EMAC_M0_SRST;
 		out_be32((void *)EMAC_M0, zmii);
 	}

 	return (eoffset);
 #else

 #if defined(CONFIG_NET_MULTI) && defined(CONFIG_405EX)
 	unsigned long rgmii;
 	int devnum = 1;

 	rgmii = in_be32((void *)RGMII_FER);
 	if (rgmii & (1 << (19 - devnum)))
 		return 0x100;
 #endif

 #if defined(CONFIG_460EX) || defined(CONFIG_460GT)
 	u32 eoffset = 0;

 	switch (addr) {
 #if defined(CONFIG_HAS_ETH1) && defined(CONFIG_GPCS_PHY1_ADDR)
 	case CONFIG_GPCS_PHY1_ADDR:
 		if (addr == EMAC_M1_IPPA_GET(in_be32((void *)EMAC_M1 + 0x100)))
 			eoffset = 0x100;
 		break;
 #endif
 #if defined(CONFIG_HAS_ETH2) && defined(CONFIG_GPCS_PHY2_ADDR)
 	case CONFIG_GPCS_PHY2_ADDR:
 		if (addr == EMAC_M1_IPPA_GET(in_be32((void *)EMAC_M1 + 0x300)))
 			eoffset = 0x300;
 		break;
 #endif
 #if defined(CONFIG_HAS_ETH3) && defined(CONFIG_GPCS_PHY3_ADDR)
 	case CONFIG_GPCS_PHY3_ADDR:
 		if (addr == EMAC_M1_IPPA_GET(in_be32((void *)EMAC_M1 + 0x400)))
 			eoffset = 0x400;
 		break;
 #endif
 	default:
 		eoffset = 0;
 		break;
 	}
 	return eoffset;
 #endif

 	return 0;
 #endif
 }

 static int emac_miiphy_wait(u32 emac_reg)
 {
 	u32 sta_reg;
 	int i;

 	/* wait for completion */
 	i = 0;
 	do {
 		sta_reg = in_be32((void *)EMAC_STACR + emac_reg);
 		if (i++ > 5) {
 			debug("%s [%d]: Timeout! EMAC_STACR=0x%0x\n", __func__,
 			      __LINE__, sta_reg);
 			return -1;
 		}
 		udelay(10);
 	} while ((sta_reg & EMAC_STACR_OC) == EMAC_STACR_OC_MASK);

 	return 0;
 }

 static int emac_miiphy_command(u8 addr, u8 reg, int cmd, u16 value)
 {
 	u32 emac_reg;
 	u32 sta_reg;

 	emac_reg = miiphy_getemac_offset(addr);

 	/* wait for completion */
 	if (emac_miiphy_wait(emac_reg) != 0)
 		return -1;

 	sta_reg = reg;		/* reg address */

 	/* set clock (50MHz) and read flags */
 #if defined(CONFIG_440GX) || defined(CONFIG_440SPE) || \
     defined(CONFIG_440EPX) || defined(CONFIG_440GRX) || \
     defined(CONFIG_460EX) || defined(CONFIG_460GT) || \
     defined(CONFIG_405EX)
 #if defined(CONFIG_IBM_EMAC4_V4)	/* EMAC4 V4 changed bit setting */
 	sta_reg = (sta_reg & ~EMAC_STACR_OP_MASK) | cmd;
 #else
 	sta_reg |= cmd;
 #endif
 #else
 	sta_reg = (sta_reg | cmd) & ~EMAC_STACR_CLK_100MHZ;
 #endif

 	/* Some boards (mainly 405EP based) define the PHY clock freqency fixed */
 	sta_reg = sta_reg | CONFIG_PHY_CLK_FREQ;
 	sta_reg = sta_reg | ((u32)addr << 5);	/* Phy address */
 	sta_reg = sta_reg | EMAC_STACR_OC_MASK;	/* new IBM emac v4 */
 	if (cmd == EMAC_STACR_WRITE)
 		memcpy(&sta_reg, &value, 2);	/* put in data */

 	out_be32((void *)EMAC_STACR + emac_reg, sta_reg);
 	debug("%s [%d]: sta_reg=%08x\n", __func__, __LINE__, sta_reg);

 	/* wait for completion */
 	if (emac_miiphy_wait(emac_reg) != 0)
 		return -1;

 	debug("%s [%d]: sta_reg=%08x\n", __func__, __LINE__, sta_reg);
 	if ((sta_reg & EMAC_STACR_PHYE) != 0)
 		return -1;

 	return 0;
 }

 int emac4xx_miiphy_read (char *devname, unsigned char addr, unsigned char reg,
 			 unsigned short *value)
 {
 	unsigned long sta_reg;
 	unsigned long emac_reg;

 	emac_reg = miiphy_getemac_offset(addr);

 	if (emac_miiphy_command(addr, reg, EMAC_STACR_READ, 0) != 0)
 		return -1;

 	sta_reg = in_be32((void *)EMAC_STACR + emac_reg);
 	*value = *(u16 *)(&sta_reg);

 	return 0;
 }

 /***********************************************************/
 /* write a phy reg and return the value with a rc	    */
 /***********************************************************/

 int emac4xx_miiphy_write (char *devname, unsigned char addr, unsigned char reg,
 			  unsigned short value)
 {
 	return emac_miiphy_command(addr, reg, EMAC_STACR_WRITE, value);
 }
	/*-----------------------------------------------------------------------------+
	\|
	\| This source code has been made available to you by IBM on an AS-IS
	\| basis. Anyone receiving this source is licensed under IBM
	\| copyrights to use it in any way he or she deems fit, including
	\| copying it, modifying it, compiling it, and redistributing it either
	\| with or without modifications. No license under IBM patents or
	\| patent applications is to be implied by the copyright license.
	\|
	\| Any user of this software should understand that IBM cannot provide
	\| technical support for this software and will not be responsible for
	\| any consequences resulting from the use of this software.
	\|
	\| Any person who transfers this source code or any derivative work
	\| must include the IBM copyright notice, this paragraph, and the
	\| preceding two paragraphs in the transferred software.
	\|
	\| COPYRIGHT I B M CORPORATION 1995
	\| LICENSED MATERIAL - PROGRAM PROPERTY OF I B M
	+-----------------------------------------------------------------------------*/
	/*-----------------------------------------------------------------------------+
	\|
	\| File Name: miiphy.c
	\|
	\| Function: This module has utilities for accessing the MII PHY through
	\| the EMAC3 macro.
	\|
	\| Author: Mark Wisner
	\|
	+-----------------------------------------------------------------------------*/

	/* define DEBUG for debugging output (obviously ;-)) */
	#if 0
	#define DEBUG
	#endif

	#include <common.h>
	#include <asm/processor.h>
	#include <asm/io.h>
	#include <ppc_asm.tmpl>
	#include <commproc.h>
	#include <ppc4xx_enet.h>
	#include <405_mal.h>
	#include <miiphy.h>

	#if !defined(CONFIG_PHY_CLK_FREQ)
	#define CONFIG_PHY_CLK_FREQ 0
	#endif

	/***********************************************************/
	/* Dump out to the screen PHY regs */
	/***********************************************************/

	void miiphy_dump (char *devname, unsigned char addr)
	{
	unsigned long i;
	unsigned short data;

	for (i = 0; i < 0x1A; i++) {
	if (miiphy_read (devname, addr, i, &data)) {
	printf ("read error for reg %lx\n", i);
	return;
	}
	printf ("Phy reg %lx ==> %4x\n", i, data);

	/* jump to the next set of regs */
	if (i == 0x07)
	i = 0x0f;

	} /* end for loop */
	} /* end dump */

	/***********************************************************/
	/* (Re)start autonegotiation */
	/***********************************************************/
	int phy_setup_aneg (char *devname, unsigned char addr)
	{
	u16 bmcr;

	#if defined(CONFIG_PHY_DYNAMIC_ANEG)
	/*
	* Set up advertisement based on capablilities reported by the PHY.
	* This should work for both copper and fiber.
	*/
	u16 bmsr;
	#if defined(CONFIG_PHY_GIGE)
	u16 exsr = 0x0000;
	#endif

	miiphy_read (devname, addr, PHY_BMSR, &bmsr);

	#if defined(CONFIG_PHY_GIGE)
	if (bmsr & PHY_BMSR_EXT_STAT)
	miiphy_read (devname, addr, PHY_EXSR, &exsr);

	if (exsr & (PHY_EXSR_1000XF \| PHY_EXSR_1000XH)) {
	/* 1000BASE-X */
	u16 anar = 0x0000;

	if (exsr & PHY_EXSR_1000XF)
	anar \|= PHY_X_ANLPAR_FD;

	if (exsr & PHY_EXSR_1000XH)
	anar \|= PHY_X_ANLPAR_HD;

	miiphy_write (devname, addr, PHY_ANAR, anar);
	} else
	#endif
	{
	u16 anar, btcr;

	miiphy_read (devname, addr, PHY_ANAR, &anar);
	anar &= ~(0x5000 \| PHY_ANLPAR_T4 \| PHY_ANLPAR_TXFD \|
	PHY_ANLPAR_TX \| PHY_ANLPAR_10FD \| PHY_ANLPAR_10);

	miiphy_read (devname, addr, PHY_1000BTCR, &btcr);
	btcr &= ~(0x00FF \| PHY_1000BTCR_1000FD \| PHY_1000BTCR_1000HD);

	if (bmsr & PHY_BMSR_100T4)
	anar \|= PHY_ANLPAR_T4;

	if (bmsr & PHY_BMSR_100TXF)
	anar \|= PHY_ANLPAR_TXFD;

	if (bmsr & PHY_BMSR_100TXH)
	anar \|= PHY_ANLPAR_TX;

	if (bmsr & PHY_BMSR_10TF)
	anar \|= PHY_ANLPAR_10FD;

	if (bmsr & PHY_BMSR_10TH)
	anar \|= PHY_ANLPAR_10;

	miiphy_write (devname, addr, PHY_ANAR, anar);

	#if defined(CONFIG_PHY_GIGE)
	if (exsr & PHY_EXSR_1000TF)
	btcr \|= PHY_1000BTCR_1000FD;

	if (exsr & PHY_EXSR_1000TH)
	btcr \|= PHY_1000BTCR_1000HD;

	miiphy_write (devname, addr, PHY_1000BTCR, btcr);
	#endif
	}

	#else /* defined(CONFIG_PHY_DYNAMIC_ANEG) */
	/*
	* Set up standard advertisement
	*/
	u16 adv;

	miiphy_read (devname, addr, PHY_ANAR, &adv);
	adv \|= (PHY_ANLPAR_ACK \| PHY_ANLPAR_TXFD \| PHY_ANLPAR_TX \|
	PHY_ANLPAR_10FD \| PHY_ANLPAR_10);
	miiphy_write (devname, addr, PHY_ANAR, adv);

	miiphy_read (devname, addr, PHY_1000BTCR, &adv);
	adv \|= (0x0300);
	miiphy_write (devname, addr, PHY_1000BTCR, adv);

	#endif /* defined(CONFIG_PHY_DYNAMIC_ANEG) */

	/* Start/Restart aneg */
	miiphy_read (devname, addr, PHY_BMCR, &bmcr);
	bmcr \|= (PHY_BMCR_AUTON \| PHY_BMCR_RST_NEG);
	miiphy_write (devname, addr, PHY_BMCR, bmcr);

	return 0;
	}

	/***********************************************************/
	/* read a phy reg and return the value with a rc */
	/***********************************************************/
	/* AMCC_TODO:
	* Find out of the choice for the emac for MDIO is from the bridges,
	* i.e. ZMII or RGMII as approporiate. If the bridges are not used
	* to determine the emac for MDIO, then is the SDR0_ETH_CFG[MDIO_SEL]
	* used? If so, then this routine below does not apply to the 460EX/GT.
	*
	* sr: Currently on 460EX only EMAC0 works with MDIO, so we always
	* return EMAC0 offset here
	* vg: For 460EX/460GT if internal GPCS PHY address is specified
	* return appropriate EMAC offset
	*/
	unsigned int miiphy_getemac_offset(u8 addr)
	{
	#if (defined(CONFIG_440) && \
	!defined(CONFIG_440SP) && !defined(CONFIG_440SPE) && \
	!defined(CONFIG_460EX) && !defined(CONFIG_460GT)) && \
	defined(CONFIG_NET_MULTI)
	unsigned long zmii;
	unsigned long eoffset;

	/* Need to find out which mdi port we're using */
	zmii = in_be32((void *)ZMII_FER);

	if (zmii & (ZMII_FER_MDI << ZMII_FER_V (0)))
	/* using port 0 */
	eoffset = 0;

	else if (zmii & (ZMII_FER_MDI << ZMII_FER_V (1)))
	/* using port 1 */
	eoffset = 0x100;

	else if (zmii & (ZMII_FER_MDI << ZMII_FER_V (2)))
	/* using port 2 */
	eoffset = 0x400;

	else if (zmii & (ZMII_FER_MDI << ZMII_FER_V (3)))
	/* using port 3 */
	eoffset = 0x600;

	else {
	/* None of the mdi ports are enabled! */
	/* enable port 0 */
	zmii \|= ZMII_FER_MDI << ZMII_FER_V (0);
	out_be32((void *)ZMII_FER, zmii);
	eoffset = 0;
	/* need to soft reset port 0 */
	zmii = in_be32((void *)EMAC_M0);
	zmii \|= EMAC_M0_SRST;
	out_be32((void *)EMAC_M0, zmii);
	}

	return (eoffset);
	#else

	#if defined(CONFIG_NET_MULTI) && defined(CONFIG_405EX)
	unsigned long rgmii;
	int devnum = 1;

	rgmii = in_be32((void *)RGMII_FER);
	if (rgmii & (1 << (19 - devnum)))
	return 0x100;
	#endif

	#if defined(CONFIG_460EX) \|\| defined(CONFIG_460GT)
	u32 eoffset = 0;

	switch (addr) {
	#if defined(CONFIG_HAS_ETH1) && defined(CONFIG_GPCS_PHY1_ADDR)
	case CONFIG_GPCS_PHY1_ADDR:
	if (addr == EMAC_M1_IPPA_GET(in_be32((void *)EMAC_M1 + 0x100)))
	eoffset = 0x100;
	break;
	#endif
	#if defined(CONFIG_HAS_ETH2) && defined(CONFIG_GPCS_PHY2_ADDR)
	case CONFIG_GPCS_PHY2_ADDR:
	if (addr == EMAC_M1_IPPA_GET(in_be32((void *)EMAC_M1 + 0x300)))
	eoffset = 0x300;
	break;
	#endif
	#if defined(CONFIG_HAS_ETH3) && defined(CONFIG_GPCS_PHY3_ADDR)
	case CONFIG_GPCS_PHY3_ADDR:
	if (addr == EMAC_M1_IPPA_GET(in_be32((void *)EMAC_M1 + 0x400)))
	eoffset = 0x400;
	break;
	#endif
	default:
	eoffset = 0;
	break;
	}
	return eoffset;
	#endif

	return 0;
	#endif
	}

	static int emac_miiphy_wait(u32 emac_reg)
	{
	u32 sta_reg;
	int i;

	/* wait for completion */
	i = 0;
	do {
	sta_reg = in_be32((void *)EMAC_STACR + emac_reg);
	if (i++ > 5) {
	debug("%s [%d]: Timeout! EMAC_STACR=0x%0x\n", __func__,
	__LINE__, sta_reg);
	return -1;
	}
	udelay(10);
	} while ((sta_reg & EMAC_STACR_OC) == EMAC_STACR_OC_MASK);

	return 0;
	}

	static int emac_miiphy_command(u8 addr, u8 reg, int cmd, u16 value)
	{
	u32 emac_reg;
	u32 sta_reg;

	emac_reg = miiphy_getemac_offset(addr);

	/* wait for completion */
	if (emac_miiphy_wait(emac_reg) != 0)
	return -1;

	sta_reg = reg; /* reg address */

	/* set clock (50MHz) and read flags */
	#if defined(CONFIG_440GX) \|\| defined(CONFIG_440SPE) \|\| \
	defined(CONFIG_440EPX) \|\| defined(CONFIG_440GRX) \|\| \
	defined(CONFIG_460EX) \|\| defined(CONFIG_460GT) \|\| \
	defined(CONFIG_405EX)
	#if defined(CONFIG_IBM_EMAC4_V4) /* EMAC4 V4 changed bit setting */
	sta_reg = (sta_reg & ~EMAC_STACR_OP_MASK) \| cmd;
	#else
	sta_reg \|= cmd;
	#endif
	#else
	sta_reg = (sta_reg \| cmd) & ~EMAC_STACR_CLK_100MHZ;
	#endif

	/* Some boards (mainly 405EP based) define the PHY clock freqency fixed */
	sta_reg = sta_reg \| CONFIG_PHY_CLK_FREQ;
	sta_reg = sta_reg \| ((u32)addr << 5); /* Phy address */
	sta_reg = sta_reg \| EMAC_STACR_OC_MASK; /* new IBM emac v4 */
	if (cmd == EMAC_STACR_WRITE)
	memcpy(&sta_reg, &value, 2); /* put in data */

	out_be32((void *)EMAC_STACR + emac_reg, sta_reg);
	debug("%s [%d]: sta_reg=%08x\n", __func__, __LINE__, sta_reg);

	/* wait for completion */
	if (emac_miiphy_wait(emac_reg) != 0)
	return -1;

	debug("%s [%d]: sta_reg=%08x\n", __func__, __LINE__, sta_reg);
	if ((sta_reg & EMAC_STACR_PHYE) != 0)
	return -1;

	return 0;
	}

	int emac4xx_miiphy_read (char *devname, unsigned char addr, unsigned char reg,
	unsigned short *value)
	{
	unsigned long sta_reg;
	unsigned long emac_reg;

	emac_reg = miiphy_getemac_offset(addr);

	if (emac_miiphy_command(addr, reg, EMAC_STACR_READ, 0) != 0)
	return -1;

	sta_reg = in_be32((void *)EMAC_STACR + emac_reg);
	value = (u16 *)(&sta_reg);

	return 0;
	}

	/***********************************************************/
	/* write a phy reg and return the value with a rc */
	/***********************************************************/

	int emac4xx_miiphy_write (char *devname, unsigned char addr, unsigned char reg,
	unsigned short value)
	{
	return emac_miiphy_command(addr, reg, EMAC_STACR_WRITE, value);
	}