* Patch by Sean Chang, 9 Aug 2004:

  - Added I2C support for ML300.
  - Added support for ML300 to read out its environment information
    stored on the EEPROM.
  - Added support to use board specific parameters as part of
    U-Boot's environment information.
  - Updated MLD files to support configuration for new features
    above.

* Patches by Travis Sawyer, 5 Aug 2004:
  - Remove incorrect bridge settings for eth group 6
  - Add call to setup bridge in ppc_440x_eth_initialize
  - Fix ppc_440x_eth_init to reset the phy only if its the
    first time through, otherwise, just check the phy for the
    autonegotiated speed/duplex.  This allows the use of netconsole
  - only print the speed/duplex the first time the phy is reset.

3 files changed, 1163 insertions, 0 deletions

diff --git a/board/xilinx/xilinx_iic/iic_adapter.c b/board/xilinx/xilinx_iic/iic_adapter.c
new file mode 100644
index 0000000..8ddba6a
--- /dev/null
+++ b/board/xilinx/xilinx_iic/iic_adapter.c
@@ -0,0 +1,529 @@
+/******************************************************************************
+*
+*     Author: Xilinx, Inc.
+*
+*
+*     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.
+*
+*
+*     XILINX IS PROVIDING THIS DESIGN, CODE, OR INFORMATION "AS IS" AS A
+*     COURTESY TO YOU. BY PROVIDING THIS DESIGN, CODE, OR INFORMATION AS
+*     ONE POSSIBLE IMPLEMENTATION OF THIS FEATURE, APPLICATION OR STANDARD,
+*     XILINX IS MAKING NO REPRESENTATION THAT THIS IMPLEMENTATION IS FREE
+*     FROM ANY CLAIMS OF INFRINGEMENT, AND YOU ARE RESPONSIBLE FOR OBTAINING
+*     ANY THIRD PARTY RIGHTS YOU MAY REQUIRE FOR YOUR IMPLEMENTATION.
+*     XILINX EXPRESSLY DISCLAIMS ANY WARRANTY WHATSOEVER WITH RESPECT TO
+*     THE ADEQUACY OF THE IMPLEMENTATION, INCLUDING BUT NOT LIMITED TO ANY
+*     WARRANTIES OR REPRESENTATIONS THAT THIS IMPLEMENTATION IS FREE FROM
+*     CLAIMS OF INFRINGEMENT, IMPLIED WARRANTIES OF MERCHANTABILITY AND
+*     FITNESS FOR A PARTICULAR PURPOSE.
+*
+*
+*     Xilinx hardware products are not intended for use in life support
+*     appliances, devices, or systems. Use in such applications is
+*     expressly prohibited.
+*
+*
+*     (c) Copyright 2002-2004 Xilinx Inc.
+*     All rights reserved.
+*
+*
+*     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.,
+*     675 Mass Ave, Cambridge, MA 02139, USA.
+*
+******************************************************************************/
+
+#include <common.h>
+#include <environment.h>
+#include <net.h>
+#include <configs/ml300.h>
+#include "xparameters.h"
+
+#ifdef CFG_ENV_IS_IN_EEPROM
+#include <i2c.h>
+#include "xiic_l.h"
+
+#define IIC_DELAY     5000
+
+static u8 envStep = 0;		/* 0 means crc has not been read */
+const u8 hex[] = "0123456789ABCDEF"; /* lookup table for ML300 CRC */
+
+/************************************************************************
+ * Use Xilinx provided driver to send data to EEPROM using iic bus.
+ */
+static void
+send(u32 adr, u8 * data, u32 len)
+{
+	u8 sendBuf[34];		/* first 2-bit is address and others are data */
+	u32 pos, wlen;
+	u32 ret;
+
+	wlen = 32;
+	for (pos = 0; pos < len; pos += 32) {
+		if ((len - pos) < 32)
+			wlen = len - pos;
+
+		/* Put address and data bits together */
+		sendBuf[0] = (u8) ((adr + pos) >> 8);
+		sendBuf[1] = (u8) (adr + pos);
+		memcpy(&sendBuf[2], &data[pos], wlen);
+
+		/* Send to EEPROM through iic bus */
+		ret = XIic_Send(XPAR_IIC_0_BASEADDR, CFG_I2C_EEPROM_ADDR >> 1,
+				sendBuf, wlen + 2);
+
+		udelay(IIC_DELAY);
+	}
+}
+
+/************************************************************************
+ * Use Xilinx provided driver to read data from EEPROM using the iic bus.
+ */
+static void
+receive(u32 adr, u8 * data, u32 len)
+{
+	u8 address[2];
+	u32 ret;
+
+	address[0] = (u8) (adr >> 8);
+	address[1] = (u8) adr;
+
+	/* Provide EEPROM address */
+	ret =
+	    XIic_Send(XPAR_IIC_0_BASEADDR, CFG_I2C_EEPROM_ADDR >> 1, address,
+		      2);
+	/* Receive data from EEPROM */
+	ret =
+	    XIic_Recv(XPAR_IIC_0_BASEADDR, CFG_I2C_EEPROM_ADDR >> 1, data, len);
+}
+
+/************************************************************************
+ * Convert a hexadecimal string to its equivalent integer value.
+ */
+static u8
+axtoi(u8 * hexStg)
+{
+	u8 n;			/* position in string */
+	u8 m;			/* position in digit[] to shift */
+	u8 count;		/* loop index */
+	u8 intValue;		/* integer value of hex string */
+	u8 digit[2];		/* hold values to convert */
+
+	for (n = 0; n < 2; n++) {
+		if (hexStg[n] == '\0')
+			break;
+		if (hexStg[n] > 0x29 && hexStg[n] < 0x40)
+			digit[n] = hexStg[n] & 0x0f;
+		else if (hexStg[n] >= 'a' && hexStg[n] <= 'f')
+			digit[n] = (hexStg[n] & 0x0f) + 9;
+		else if (hexStg[n] >= 'A' && hexStg[n] <= 'F')
+			digit[n] = (hexStg[n] & 0x0f) + 9;
+		else
+			break;
+	}
+
+	intValue = 0;
+	count = n;
+	m = n - 1;
+	n = 0;
+	while (n < count) {
+		intValue = intValue | (digit[n] << (m << 2));
+		m--;		/* adjust the position to set */
+		n++;		/* next digit to process */
+	}
+
+	return (intValue);
+}
+
+/************************************************************************
+ * Convert an integer string to its equivalent value.
+ */
+static u8
+atoi(uchar * string)
+{
+	u8 res = 0;
+	while (*string >= '0' && *string <= '9') {
+		res *= 10;
+		res += *string - '0';
+		string++;
+	}
+
+	return res;
+}
+
+/************************************************************************
+ * Key-value pairs are separated by "=" sign.
+ */
+static void
+findKey(uchar * buffer, int *loc, u8 len)
+{
+	u32 i;
+
+	for (i = 0; i < len; i++)
+		if (buffer[i] == '=') {
+			*loc = i;
+			return;
+		}
+
+	/* return -1 is no "=" sign found */
+	*loc = -1;
+}
+
+/************************************************************************
+ * Compute a new ML300 CRC when user calls the saveenv command.
+ * Also update EEPROM with new CRC value.
+ */
+static u8
+update_crc(u32 len, uchar * data)
+{
+	uchar temp[6] = { 'C', '=', 0x00, 0x00, 0x00, 0x00 };
+	u32 crc;		/* new crc value */
+	u32 i;
+
+	crc = 0;
+
+	/* calculate new CRC */
+	for (i = 0; i < len; i++)
+		crc += data[i];
+
+	/* CRC includes key for check sum */
+	crc += 'C' + '=';
+
+	/* compose new CRC to be updated */
+	temp[2] = hex[(crc >> 4) & 0xf];
+	temp[3] = hex[crc & 0xf];
+
+	/* check to see if env size exceeded */
+	if (len + 6 > ENV_SIZE) {
+		printf("ERROR: not enough space to store CRC on EEPROM");
+		return 1;
+	}
+
+	memcpy(data + len, temp, 6);
+	return 0;
+}
+
+/************************************************************************
+ * Read out ML300 CRC and compare it with a runtime calculated ML300 CRC.
+ * If equal, then pass back a u-boot CRC value, otherwise pass back
+ * junk to indicate CRC error.
+*/
+static void
+read_crc(uchar * buffer, int len)
+{
+	u32 addr, n;
+	u32 crc;		/* runtime crc */
+	u8 old[2] = { 0xff, 0xff };	/* current CRC in EEPROM */
+	u8 stop;		/* indication of end of env data */
+	u8 pre;			/* previous EEPROM data bit */
+	int i, loc;
+
+	addr = CFG_ENV_OFFSET;	/* start from first env address */
+	n = 0;
+	pre = 1;
+	stop = 1;
+	crc = 0;
+
+	/* calculate runtime CRC according to ML300 and read back
+	   old CRC stored in the EEPROM */
+	while (n < CFG_ENV_SIZE) {
+		receive(addr, buffer, len);
+
+		/* found two null chars, end of env */
+		if ((pre || buffer[0]) == 0)
+			break;
+
+		findKey(buffer, &loc, len);
+
+		/* found old check sum, read and store old CRC */
+		if ((loc == 0 && pre == 'C')
+		    || (loc > 0 && buffer[loc - 1] == 'C'))
+			receive(addr + loc + 1, old, 2);
+
+		pre = buffer[len - 1];
+
+		/* calculate runtime ML300 CRC */
+		crc += buffer[0];
+		i = 1;
+		do {
+			crc += buffer[i];
+			stop = buffer[i] || buffer[i - 1];
+			i++;
+		} while (stop && (i < len));
+
+		if (stop == 0)
+			break;
+
+		n += len;
+		addr += len;
+	}
+
+	/* exclude old CRC from runtime calculation */
+	crc -= (old[0] + old[1]);
+
+	/* match CRC values, send back u-boot CRC */
+	if ((old[0] == hex[(crc >> 4) & 0xf])
+	    && (old[1] == hex[crc & 0xf])) {
+		crc = 0;
+		n = 0;
+		addr =
+		    CFG_ENV_OFFSET - offsetof(env_t, crc) + offsetof(env_t,
+								     data);
+		/* calculate u-boot crc */
+		while (n < ENV_SIZE) {
+			receive(addr, buffer, len);
+			crc = crc32(crc, buffer, len);
+			n += len;
+			addr += len;
+		}
+
+		memcpy(buffer, &crc, 4);
+	}
+}
+
+/************************************************************************
+ * Convert IP address to hexadecimals.
+ */
+static void
+ip_ml300(uchar * s, uchar * res)
+{
+	uchar temp[2];
+	u8 i;
+
+	res[0] = 0x00;
+
+	for (i = 0; i < 4; i++) {
+		sprintf(temp, "%02x", atoi(s));
+		s = strchr(s, '.') + 1;
+		strcat(res, temp);
+	}
+}
+
+/************************************************************************
+ * Change 0xff (255), a dummy null char to 0x00.
+ */
+static void
+change_null(uchar * s)
+{
+	if (s != NULL) {
+		change_null(strchr(s + 1, 255));
+		*(strchr(s, 255)) = '\0';
+	}
+}
+
+/************************************************************************
+ * Update environment variable name and values to u-boot standard.
+ */
+void
+convert_env(void)
+{
+	uchar *s;		/* pointer to env value */
+	uchar temp[20];		/* temp storage for addresses */
+
+	/* E -> ethaddr */
+	s = getenv("E");
+	if (s != NULL) {
+		sprintf(temp, "%c%c.%c%c.%c%c.%c%c.%c%c.%c%c",
+			*s++, *s++, *s++, *s++, *s++, *s++,
+			*s++, *s++, *s++, *s++, *s++, *s);
+		setenv("ethaddr", temp);
+		setenv("E", NULL);
+	}
+
+	/* L -> serial# */
+	s = getenv("L");
+	if (s != NULL) {
+		setenv("serial#", s);
+		setenv("L", NULL);
+	}
+
+	/* I -> ipaddr */
+	s = getenv("I");
+	if (s != NULL) {
+		sprintf(temp, "%d.%d.%d.%d", axtoi(s), axtoi(s + 2),
+			axtoi(s + 4), axtoi(s + 6));
+		setenv("ipaddr", temp);
+		setenv("I", NULL);
+	}
+
+	/* S -> serverip */
+	s = getenv("S");
+	if (s != NULL) {
+		sprintf(temp, "%d.%d.%d.%d", axtoi(s), axtoi(s + 2),
+			axtoi(s + 4), axtoi(s + 6));
+		setenv("serverip", temp);
+		setenv("S", NULL);
+	}
+
+	/* A -> bootargs */
+	s = getenv("A");
+	if (s != NULL) {
+		setenv("bootargs", s);
+		setenv("A", NULL);
+	}
+
+	/* F -> bootfile */
+	s = getenv("F");
+	if (s != NULL) {
+		setenv("bootfile", s);
+		setenv("F", NULL);
+	}
+
+	/* M -> bootcmd */
+	s = getenv("M");
+	if (s != NULL) {
+		setenv("bootcmd", s);
+		setenv("M", NULL);
+	}
+
+	/* Don't include C (CRC) */
+	setenv("C", NULL);
+}
+
+/************************************************************************
+ * Save user modified environment values back to EEPROM.
+ */
+static void
+save_env(void)
+{
+	uchar eprom[ENV_SIZE];	/* buffer to be written back to EEPROM */
+	uchar *s, temp[20];
+	uchar ff[] = { 0xff, 0x00 };	/* dummy null value */
+	u32 len;		/* length of env to be written to EEPROM */
+
+	eprom[0] = 0x00;
+
+	/* ethaddr -> E */
+	s = getenv("ethaddr");
+	if (s != NULL) {
+		strcat(eprom, "E=");
+		sprintf(temp, "%c%c%c%c%c%c%c%c%c%c%c%c",
+			*s, *(s + 1), *(s + 3), *(s + 4), *(s + 6), *(s + 7),
+			*(s + 9), *(s + 10), *(s + 12), *(s + 13), *(s + 15),
+			*(s + 16));
+		strcat(eprom, temp);
+		strcat(eprom, ff);
+	}
+
+	/* serial# -> L */
+	s = getenv("serial#");
+	if (s != NULL) {
+		strcat(eprom, "L=");
+		strcat(eprom, s);
+		strcat(eprom, ff);
+	}
+
+	/* ipaddr -> I */
+	s = getenv("ipaddr");
+	if (s != NULL) {
+		strcat(eprom, "I=");
+		ip_ml300(s, temp);
+		strcat(eprom, temp);
+		strcat(eprom, ff);
+	}
+
+	/* serverip -> S */
+	s = getenv("serverip");
+	if (s != NULL) {
+		strcat(eprom, "S=");
+		ip_ml300(s, temp);
+		strcat(eprom, temp);
+		strcat(eprom, ff);
+	}
+
+	/* bootargs -> A */
+	s = getenv("bootargs");
+	if (s != NULL) {
+		strcat(eprom, "A=");
+		strcat(eprom, s);
+		strcat(eprom, ff);
+	}
+
+	/* bootfile -> F */
+	s = getenv("bootfile");
+	if (s != NULL) {
+		strcat(eprom, "F=");
+		strcat(eprom, s);
+		strcat(eprom, ff);
+	}
+
+	/* bootcmd -> M */
+	s = getenv("bootcmd");
+	if (s != NULL) {
+		strcat(eprom, "M=");
+		strcat(eprom, s);
+		strcat(eprom, ff);
+	}
+
+	len = strlen(eprom);	/* find env length without crc */
+	change_null(eprom);	/* change 0xff to 0x00 */
+
+	/* update EEPROM env values if there is enough space */
+	if (update_crc(len, eprom) == 0)
+		send(CFG_ENV_OFFSET, eprom, len + 6);
+}
+
+/************************************************************************
+ * U-boot call for EEPROM read associated activities.
+ */
+int
+i2c_read(uchar chip, uint addr, int alen, uchar * buffer, int len)
+{
+
+	if (envStep == 0) {
+		/* first read call is for crc */
+		read_crc(buffer, len);
+		++envStep;
+		return 0;
+	} else if (envStep == 1) {
+		/* then read out EEPROM content for runtime u-boot CRC calculation */
+		receive(addr, buffer, len);
+
+		if (addr + len - CFG_ENV_OFFSET == CFG_ENV_SIZE)
+			/* end of runtime crc read */
+			++envStep;
+		return 0;
+	}
+
+	if (len < 2) {
+		/* when call getenv_r */
+		receive(addr, buffer, len);
+	} else if (addr + len < CFG_ENV_OFFSET + CFG_ENV_SIZE) {
+		/* calling env_relocate(), but don't read out
+		   crc value from EEPROM */
+		receive(addr, buffer + 4, len);
+	} else {
+		receive(addr, buffer + 4, len - 4);
+	}
+
+	return 0;
+
+}
+
+/************************************************************************
+ * U-boot call for EEPROM write acativities.
+ */
+int
+i2c_write(uchar chip, uint addr, int alen, uchar * buffer, int len)
+{
+	/* save env on last page write called by u-boot */
+	if (addr + len >= CFG_ENV_OFFSET + CFG_ENV_SIZE)
+		save_env();
+
+	return 0;
+}
+
+/************************************************************************
+ * Dummy function.
+ */
+int
+i2c_probe(uchar chip)
+{
+	return 1;
+}
+
+#endif
diff --git a/board/xilinx/xilinx_iic/xiic_l.c b/board/xilinx/xilinx_iic/xiic_l.c
new file mode 100644
index 0000000..6b78163
--- /dev/null
+++ b/board/xilinx/xilinx_iic/xiic_l.c
@@ -0,0 +1,484 @@
+/* $Id: xiic_l.c,v 1.2 2002/12/05 19:32:40 meinelte Exp $ */
+/******************************************************************************
+*
+*	XILINX IS PROVIDING THIS DESIGN, CODE, OR INFORMATION "AS IS"
+*	AS A COURTESY TO YOU, SOLELY FOR USE IN DEVELOPING PROGRAMS AND
+*	SOLUTIONS FOR XILINX DEVICES.  BY PROVIDING THIS DESIGN, CODE,
+*	OR INFORMATION AS ONE POSSIBLE IMPLEMENTATION OF THIS FEATURE,
+*	APPLICATION OR STANDARD, XILINX IS MAKING NO REPRESENTATION
+*	THAT THIS IMPLEMENTATION IS FREE FROM ANY CLAIMS OF INFRINGEMENT,
+*	AND YOU ARE RESPONSIBLE FOR OBTAINING ANY RIGHTS YOU MAY REQUIRE
+*	FOR YOUR IMPLEMENTATION.  XILINX EXPRESSLY DISCLAIMS ANY
+*	WARRANTY WHATSOEVER WITH RESPECT TO THE ADEQUACY OF THE
+*	IMPLEMENTATION, INCLUDING BUT NOT LIMITED TO ANY WARRANTIES OR
+*	REPRESENTATIONS THAT THIS IMPLEMENTATION IS FREE FROM CLAIMS OF
+*	INFRINGEMENT, IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+*	FOR A PARTICULAR PURPOSE.
+*
+*	(c) Copyright 2002 Xilinx Inc.
+*	All rights reserved.
+*
+******************************************************************************/
+/*****************************************************************************/
+/**
+*
+* @file xiic_l.c
+*
+* This file contains low-level driver functions that can be used to access the
+* device.  The user should refer to the hardware device specification for more
+* details of the device operation.
+*
+* <pre>
+* MODIFICATION HISTORY:
+*
+* Ver	Who  Date     Changes
+* ----- --- -------  -----------------------------------------------
+* 1.01b jhl 5/13/02  First release
+* 1.01b jhl 10/14/02 Corrected bug in the receive function, the setup of the
+*		     interrupt status mask was not being done in the loop such
+*		     that a read would sometimes fail on the last byte because
+*		     the transmit error which should have been ignored was
+*		     being used.  This would leave an extra byte in the FIFO
+*		     and the bus throttled such that the next operation would
+*		     also fail.	 Also updated the receive function to not
+*		     disable the device after the last byte until after the
+*		     bus transitions to not busy which is more consistent
+*		     with the expected behavior.
+* 1.01c ecm 12/05/02 new rev
+* </pre>
+*
+****************************************************************************/
+
+/***************************** Include Files *******************************/
+
+#include "xbasic_types.h"
+#include "xio.h"
+#include "xipif_v1_23_b.h"
+#include "xiic_l.h"
+
+/************************** Constant Definitions ***************************/
+
+/**************************** Type Definitions *****************************/
+
+
+/***************** Macros (Inline Functions) Definitions *******************/
+
+
+/******************************************************************************
+*
+* This macro clears the specified interrupt in the IPIF interrupt status
+* register.  It is non-destructive in that the register is read and only the
+* interrupt specified is cleared.  Clearing an interrupt acknowledges it.
+*
+* @param    BaseAddress contains the IPIF registers base address.
+*
+* @param    InterruptMask contains the interrupts to be disabled
+*
+* @return
+*
+* None.
+*
+* @note
+*
+* Signature: void XIic_mClearIisr(u32 BaseAddress,
+*				  u32 InterruptMask);
+*
+******************************************************************************/
+#define XIic_mClearIisr(BaseAddress, InterruptMask)		    \
+    XIIF_V123B_WRITE_IISR((BaseAddress),			    \
+	XIIF_V123B_READ_IISR(BaseAddress) & (InterruptMask))
+
+/******************************************************************************
+*
+* This macro sends the address for a 7 bit address during both read and write
+* operations. It takes care of the details to format the address correctly.
+* This macro is designed to be called internally to the drivers.
+*
+* @param    SlaveAddress contains the address of the slave to send to.
+*
+* @param    Operation indicates XIIC_READ_OPERATION or XIIC_WRITE_OPERATION
+*
+* @return
+*
+* None.
+*
+* @note
+*
+* Signature: void XIic_mSend7BitAddr(u16 SlaveAddress, u8 Operation);
+*
+******************************************************************************/
+#define XIic_mSend7BitAddress(BaseAddress, SlaveAddress, Operation)	    \
+{									    \
+    u8 LocalAddr = (u8)(SlaveAddress << 1);			    \
+    LocalAddr = (LocalAddr & 0xFE) | (Operation);			    \
+    XIo_Out8(BaseAddress + XIIC_DTR_REG_OFFSET, LocalAddr);		    \
+}
+
+/************************** Function Prototypes ****************************/
+
+static unsigned RecvData (u32 BaseAddress, u8 * BufferPtr,
+			  unsigned ByteCount);
+static unsigned SendData (u32 BaseAddress, u8 * BufferPtr,
+			  unsigned ByteCount);
+
+/************************** Variable Definitions **************************/
+
+
+/****************************************************************************/
+/**
+* Receive data as a master on the IIC bus.  This function receives the data
+* using polled I/O and blocks until the data has been received.	 It only
+* supports 7 bit addressing and non-repeated start modes of operation.	The
+* user is responsible for ensuring the bus is not busy if multiple masters
+* are present on the bus.
+*
+* @param    BaseAddress contains the base address of the IIC device.
+* @param    Address contains the 7 bit IIC address of the device to send the
+*	    specified data to.
+* @param    BufferPtr points to the data to be sent.
+* @param    ByteCount is the number of bytes to be sent.
+*
+* @return
+*
+* The number of bytes received.
+*
+* @note
+*
+* None
+*
+******************************************************************************/
+unsigned XIic_Recv (u32 BaseAddress, u8 Address,
+		    u8 * BufferPtr, unsigned ByteCount)
+{
+	u8 CntlReg;
+	unsigned RemainingByteCount;
+
+	/* Tx error is enabled incase the address (7 or 10) has no device to answer
+	 * with Ack. When only one byte of data, must set NO ACK before address goes
+	 * out therefore Tx error must not be enabled as it will go off immediately
+	 * and the Rx full interrupt will be checked.  If full, then the one byte
+	 * was received and the Tx error will be disabled without sending an error
+	 * callback msg.
+	 */
+	XIic_mClearIisr (BaseAddress,
+			 XIIC_INTR_RX_FULL_MASK | XIIC_INTR_TX_ERROR_MASK |
+			 XIIC_INTR_ARB_LOST_MASK);
+
+	/* Set receive FIFO occupancy depth for 1 byte (zero based)
+	 */
+	XIo_Out8 (BaseAddress + XIIC_RFD_REG_OFFSET, 0);
+
+	/* 7 bit slave address, send the address for a read operation
+	 * and set the state to indicate the address has been sent
+	 */
+	XIic_mSend7BitAddress (BaseAddress, Address, XIIC_READ_OPERATION);
+
+	/* MSMS gets set after putting data in FIFO. Start the master receive
+	 * operation by setting CR Bits MSMS to Master, if the buffer is only one
+	 * byte, then it should not be acknowledged to indicate the end of data
+	 */
+	CntlReg = XIIC_CR_MSMS_MASK | XIIC_CR_ENABLE_DEVICE_MASK;
+	if (ByteCount == 1) {
+		CntlReg |= XIIC_CR_NO_ACK_MASK;
+	}
+
+	/* Write out the control register to start receiving data and call the
+	 * function to receive each byte into the buffer
+	 */
+	XIo_Out8 (BaseAddress + XIIC_CR_REG_OFFSET, CntlReg);
+
+	/* Clear the latched interrupt status for the bus not busy bit which must
+	 * be done while the bus is busy
+	 */
+	XIic_mClearIisr (BaseAddress, XIIC_INTR_BNB_MASK);
+
+	/* Try to receive the data from the IIC bus */
+
+	RemainingByteCount = RecvData (BaseAddress, BufferPtr, ByteCount);
+	/*
+	 * The receive is complete, disable the IIC device and return the number of
+	 * bytes that was received
+	 */
+	XIo_Out8 (BaseAddress + XIIC_CR_REG_OFFSET, 0);
+
+	/* Return the number of bytes that was received */
+
+	return ByteCount - RemainingByteCount;
+}
+
+/******************************************************************************
+*
+* Receive the specified data from the device that has been previously addressed
+* on the IIC bus.  This function assumes that the 7 bit address has been sent
+* and it should wait for the transmit of the address to complete.
+*
+* @param    BaseAddress contains the base address of the IIC device.
+* @param    BufferPtr points to the buffer to hold the data that is received.
+* @param    ByteCount is the number of bytes to be received.
+*
+* @return
+*
+* The number of bytes remaining to be received.
+*
+* @note
+*
+* This function does not take advantage of the receive FIFO because it is
+* designed for minimal code space and complexity.  It contains loops that
+* that could cause the function not to return if the hardware is not working.
+*
+* This function assumes that the calling function will disable the IIC device
+* after this function returns.
+*
+******************************************************************************/
+static unsigned RecvData (u32 BaseAddress, u8 * BufferPtr, unsigned ByteCount)
+{
+	u8 CntlReg;
+	u32 IntrStatusMask;
+	u32 IntrStatus;
+
+	/* Attempt to receive the specified number of bytes on the IIC bus */
+
+	while (ByteCount > 0) {
+		/* Setup the mask to use for checking errors because when receiving one
+		 * byte OR the last byte of a multibyte message an error naturally
+		 * occurs when the no ack is done to tell the slave the last byte
+		 */
+		if (ByteCount == 1) {
+			IntrStatusMask =
+				XIIC_INTR_ARB_LOST_MASK | XIIC_INTR_BNB_MASK;
+		} else {
+			IntrStatusMask =
+				XIIC_INTR_ARB_LOST_MASK |
+				XIIC_INTR_TX_ERROR_MASK | XIIC_INTR_BNB_MASK;
+		}
+
+		/* Wait for the previous transmit and the 1st receive to complete
+		 * by checking the interrupt status register of the IPIF
+		 */
+		while (1) {
+			IntrStatus = XIIF_V123B_READ_IISR (BaseAddress);
+			if (IntrStatus & XIIC_INTR_RX_FULL_MASK) {
+				break;
+			}
+			/* Check the transmit error after the receive full because when
+			 * sending only one byte transmit error will occur because of the
+			 * no ack to indicate the end of the data
+			 */
+			if (IntrStatus & IntrStatusMask) {
+				return ByteCount;
+			}
+		}
+
+		CntlReg = XIo_In8 (BaseAddress + XIIC_CR_REG_OFFSET);
+
+		/* Special conditions exist for the last two bytes so check for them
+		 * Note that the control register must be setup for these conditions
+		 * before the data byte which was already received is read from the
+		 * receive FIFO (while the bus is throttled
+		 */
+		if (ByteCount == 1) {
+			/* For the last data byte, it has already been read and no ack
+			 * has been done, so clear MSMS while leaving the device enabled
+			 * so it can get off the IIC bus appropriately with a stop.
+			 */
+			XIo_Out8 (BaseAddress + XIIC_CR_REG_OFFSET,
+				  XIIC_CR_ENABLE_DEVICE_MASK);
+		}
+
+		/* Before the last byte is received, set NOACK to tell the slave IIC
+		 * device that it is the end, this must be done before reading the byte
+		 * from the FIFO
+		 */
+		if (ByteCount == 2) {
+			/* Write control reg with NO ACK allowing last byte to
+			 * have the No ack set to indicate to slave last byte read.
+			 */
+			XIo_Out8 (BaseAddress + XIIC_CR_REG_OFFSET,
+				  CntlReg | XIIC_CR_NO_ACK_MASK);
+		}
+
+		/* Read in data from the FIFO and unthrottle the bus such that the
+		 * next byte is read from the IIC bus
+		 */
+		*BufferPtr++ = XIo_In8 (BaseAddress + XIIC_DRR_REG_OFFSET);
+
+		/* Clear the latched interrupt status so that it will be updated with
+		 * the new state when it changes, this must be done after the receive
+		 * register is read
+		 */
+		XIic_mClearIisr (BaseAddress, XIIC_INTR_RX_FULL_MASK |
+				 XIIC_INTR_TX_ERROR_MASK |
+				 XIIC_INTR_ARB_LOST_MASK);
+		ByteCount--;
+	}
+
+	/* Wait for the bus to transition to not busy before returning, the IIC
+	 * device cannot be disabled until this occurs.	 It should transition as
+	 * the MSMS bit of the control register was cleared before the last byte
+	 * was read from the FIFO.
+	 */
+	while (1) {
+		if (XIIF_V123B_READ_IISR (BaseAddress) & XIIC_INTR_BNB_MASK) {
+			break;
+		}
+	}
+
+	return ByteCount;
+}
+
+/****************************************************************************/
+/**
+* Send data as a master on the IIC bus.	 This function sends the data
+* using polled I/O and blocks until the data has been sent.  It only supports
+* 7 bit addressing and non-repeated start modes of operation.  The user is
+* responsible for ensuring the bus is not busy if multiple masters are present
+* on the bus.
+*
+* @param    BaseAddress contains the base address of the IIC device.
+* @param    Address contains the 7 bit IIC address of the device to send the
+*	    specified data to.
+* @param    BufferPtr points to the data to be sent.
+* @param    ByteCount is the number of bytes to be sent.
+*
+* @return
+*
+* The number of bytes sent.
+*
+* @note
+*
+* None
+*
+******************************************************************************/
+unsigned XIic_Send (u32 BaseAddress, u8 Address,
+		    u8 * BufferPtr, unsigned ByteCount)
+{
+	unsigned RemainingByteCount;
+
+	/* Put the address into the FIFO to be sent and indicate that the operation
+	 * to be performed on the bus is a write operation
+	 */
+	XIic_mSend7BitAddress (BaseAddress, Address, XIIC_WRITE_OPERATION);
+
+	/* Clear the latched interrupt status so that it will be updated with the
+	 * new state when it changes, this must be done after the address is put
+	 * in the FIFO
+	 */
+	XIic_mClearIisr (BaseAddress, XIIC_INTR_TX_EMPTY_MASK |
+			 XIIC_INTR_TX_ERROR_MASK | XIIC_INTR_ARB_LOST_MASK);
+
+	/* MSMS must be set after putting data into transmit FIFO, indicate the
+	 * direction is transmit, this device is master and enable the IIC device
+	 */
+	XIo_Out8 (BaseAddress + XIIC_CR_REG_OFFSET,
+		  XIIC_CR_MSMS_MASK | XIIC_CR_DIR_IS_TX_MASK |
+		  XIIC_CR_ENABLE_DEVICE_MASK);
+
+	/* Clear the latched interrupt
+	 * status for the bus not busy bit which must be done while the bus is busy
+	 */
+	XIic_mClearIisr (BaseAddress, XIIC_INTR_BNB_MASK);
+
+	/* Send the specified data to the device on the IIC bus specified by the
+	 * the address
+	 */
+	RemainingByteCount = SendData (BaseAddress, BufferPtr, ByteCount);
+
+	/*
+	 * The send is complete, disable the IIC device and return the number of
+	 * bytes that was sent
+	 */
+	XIo_Out8 (BaseAddress + XIIC_CR_REG_OFFSET, 0);
+
+	return ByteCount - RemainingByteCount;
+}
+
+/******************************************************************************
+*
+* Send the specified buffer to the device that has been previously addressed
+* on the IIC bus.  This function assumes that the 7 bit address has been sent
+* and it should wait for the transmit of the address to complete.
+*
+* @param    BaseAddress contains the base address of the IIC device.
+* @param    BufferPtr points to the data to be sent.
+* @param    ByteCount is the number of bytes to be sent.
+*
+* @return
+*
+* The number of bytes remaining to be sent.
+*
+* @note
+*
+* This function does not take advantage of the transmit FIFO because it is
+* designed for minimal code space and complexity.  It contains loops that
+* that could cause the function not to return if the hardware is not working.
+*
+******************************************************************************/
+static unsigned SendData (u32 BaseAddress, u8 * BufferPtr, unsigned ByteCount)
+{
+	u32 IntrStatus;
+
+	/* Send the specified number of bytes in the specified buffer by polling
+	 * the device registers and blocking until complete
+	 */
+	while (ByteCount > 0) {
+		/* Wait for the transmit to be empty before sending any more data
+		 * by polling the interrupt status register
+		 */
+		while (1) {
+			IntrStatus = XIIF_V123B_READ_IISR (BaseAddress);
+
+			if (IntrStatus & (XIIC_INTR_TX_ERROR_MASK |
+					  XIIC_INTR_ARB_LOST_MASK |
+					  XIIC_INTR_BNB_MASK)) {
+				return ByteCount;
+			}
+
+			if (IntrStatus & XIIC_INTR_TX_EMPTY_MASK) {
+				break;
+			}
+		}
+		/* If there is more than one byte to send then put the next byte to send
+		 * into the transmit FIFO
+		 */
+		if (ByteCount > 1) {
+			XIo_Out8 (BaseAddress + XIIC_DTR_REG_OFFSET,
+				  *BufferPtr++);
+		} else {
+			/* Set the stop condition before sending the last byte of data so that
+			 * the stop condition will be generated immediately following the data
+			 * This is done by clearing the MSMS bit in the control register.
+			 */
+			XIo_Out8 (BaseAddress + XIIC_CR_REG_OFFSET,
+				  XIIC_CR_ENABLE_DEVICE_MASK |
+				  XIIC_CR_DIR_IS_TX_MASK);
+
+			/* Put the last byte to send in the transmit FIFO */
+
+			XIo_Out8 (BaseAddress + XIIC_DTR_REG_OFFSET,
+				  *BufferPtr++);
+		}
+
+		/* Clear the latched interrupt status register and this must be done after
+		 * the transmit FIFO has been written to or it won't clear
+		 */
+		XIic_mClearIisr (BaseAddress, XIIC_INTR_TX_EMPTY_MASK);
+
+		/* Update the byte count to reflect the byte sent and clear the latched
+		 * interrupt status so it will be updated for the new state
+		 */
+		ByteCount--;
+	}
+
+	/* Wait for the bus to transition to not busy before returning, the IIC
+	 * device cannot be disabled until this occurs.
+	 * Note that this is different from a receive operation because the stop
+	 * condition causes the bus to go not busy.
+	 */
+	while (1) {
+		if (XIIF_V123B_READ_IISR (BaseAddress) & XIIC_INTR_BNB_MASK) {
+			break;
+		}
+	}
+
+	return ByteCount;
+}
diff --git a/board/xilinx/xilinx_iic/xiic_l.h b/board/xilinx/xilinx_iic/xiic_l.h
new file mode 100644
index 0000000..a2c4c49
--- /dev/null
+++ b/board/xilinx/xilinx_iic/xiic_l.h
@@ -0,0 +1,150 @@
+/* $Id: xiic_l.h,v 1.2 2002/12/05 19:32:40 meinelte Exp $ */
+/*****************************************************************************
+*
+*	XILINX IS PROVIDING THIS DESIGN, CODE, OR INFORMATION "AS IS"
+*	AS A COURTESY TO YOU, SOLELY FOR USE IN DEVELOPING PROGRAMS AND
+*	SOLUTIONS FOR XILINX DEVICES.  BY PROVIDING THIS DESIGN, CODE,
+*	OR INFORMATION AS ONE POSSIBLE IMPLEMENTATION OF THIS FEATURE,
+*	APPLICATION OR STANDARD, XILINX IS MAKING NO REPRESENTATION
+*	THAT THIS IMPLEMENTATION IS FREE FROM ANY CLAIMS OF INFRINGEMENT,
+*	AND YOU ARE RESPONSIBLE FOR OBTAINING ANY RIGHTS YOU MAY REQUIRE
+*	FOR YOUR IMPLEMENTATION.  XILINX EXPRESSLY DISCLAIMS ANY
+*	WARRANTY WHATSOEVER WITH RESPECT TO THE ADEQUACY OF THE
+*	IMPLEMENTATION, INCLUDING BUT NOT LIMITED TO ANY WARRANTIES OR
+*	REPRESENTATIONS THAT THIS IMPLEMENTATION IS FREE FROM CLAIMS OF
+*	INFRINGEMENT, IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+*	FOR A PARTICULAR PURPOSE.
+*
+*	(c) Copyright 2002 Xilinx Inc.
+*	All rights reserved.
+*
+*****************************************************************************/
+/****************************************************************************/
+/**
+*
+* @file xiic_l.h
+*
+* This header file contains identifiers and low-level driver functions (or
+* macros) that can be used to access the device.  High-level driver functions
+* are defined in xiic.h.
+*
+* <pre>
+* MODIFICATION HISTORY:
+*
+* Ver	Who  Date     Changes
+* ----- ---- -------- -----------------------------------------------
+* 1.00b jhl  05/07/02 First release
+* 1.01c ecm  12/05/02 new rev
+* </pre>
+*
+*****************************************************************************/
+
+#ifndef XIIC_L_H /* prevent circular inclusions */
+#define XIIC_L_H /* by using protection macros */
+
+/***************************** Include Files ********************************/
+
+#include "xbasic_types.h"
+
+/************************** Constant Definitions ****************************/
+
+#define XIIC_MSB_OFFSET		       3
+
+#define XIIC_REG_OFFSET 0x100 + XIIC_MSB_OFFSET
+
+/*
+ * Register offsets in bytes from RegisterBase. Three is added to the
+ * base offset to access LSB (IBM style) of the word
+ */
+#define XIIC_CR_REG_OFFSET   0x00+XIIC_REG_OFFSET   /* Control Register	  */
+#define XIIC_SR_REG_OFFSET   0x04+XIIC_REG_OFFSET   /* Status Register	  */
+#define XIIC_DTR_REG_OFFSET  0x08+XIIC_REG_OFFSET   /* Data Tx Register	  */
+#define XIIC_DRR_REG_OFFSET  0x0C+XIIC_REG_OFFSET   /* Data Rx Register	  */
+#define XIIC_ADR_REG_OFFSET  0x10+XIIC_REG_OFFSET   /* Address Register	  */
+#define XIIC_TFO_REG_OFFSET  0x14+XIIC_REG_OFFSET   /* Tx FIFO Occupancy  */
+#define XIIC_RFO_REG_OFFSET  0x18+XIIC_REG_OFFSET   /* Rx FIFO Occupancy  */
+#define XIIC_TBA_REG_OFFSET  0x1C+XIIC_REG_OFFSET   /* 10 Bit Address reg */
+#define XIIC_RFD_REG_OFFSET  0x20+XIIC_REG_OFFSET   /* Rx FIFO Depth reg  */
+
+/* Control Register masks */
+
+#define XIIC_CR_ENABLE_DEVICE_MASK	  0x01	/* Device enable = 1	  */
+#define XIIC_CR_TX_FIFO_RESET_MASK	  0x02	/* Transmit FIFO reset=1  */
+#define XIIC_CR_MSMS_MASK		  0x04	/* Master starts Txing=1  */
+#define XIIC_CR_DIR_IS_TX_MASK		  0x08	/* Dir of tx. Txing=1	  */
+#define XIIC_CR_NO_ACK_MASK		  0x10	/* Tx Ack. NO ack = 1	  */
+#define XIIC_CR_REPEATED_START_MASK	  0x20	/* Repeated start = 1	  */
+#define XIIC_CR_GENERAL_CALL_MASK	  0x40	/* Gen Call enabled = 1	  */
+
+/* Status Register masks */
+
+#define XIIC_SR_GEN_CALL_MASK		  0x01	/* 1=a mstr issued a GC	  */
+#define XIIC_SR_ADDR_AS_SLAVE_MASK	  0x02	/* 1=when addr as slave	  */
+#define XIIC_SR_BUS_BUSY_MASK		  0x04	/* 1 = bus is busy	  */
+#define XIIC_SR_MSTR_RDING_SLAVE_MASK	  0x08	/* 1=Dir: mstr <-- slave  */
+#define XIIC_SR_TX_FIFO_FULL_MASK	  0x10	/* 1 = Tx FIFO full	  */
+#define XIIC_SR_RX_FIFO_FULL_MASK	  0x20	/* 1 = Rx FIFO full	  */
+#define XIIC_SR_RX_FIFO_EMPTY_MASK	  0x40	/* 1 = Rx FIFO empty	  */
+
+/* IPIF Interrupt Status Register masks	   Interrupt occurs when...	  */
+
+#define XIIC_INTR_ARB_LOST_MASK		  0x01	/* 1 = arbitration lost	  */
+#define XIIC_INTR_TX_ERROR_MASK		  0x02	/* 1=Tx error/msg complete*/
+#define XIIC_INTR_TX_EMPTY_MASK		  0x04	/* 1 = Tx FIFO/reg empty  */
+#define XIIC_INTR_RX_FULL_MASK		  0x08	/* 1=Rx FIFO/reg=OCY level*/
+#define XIIC_INTR_BNB_MASK		  0x10	/* 1 = Bus not busy	  */
+#define XIIC_INTR_AAS_MASK		  0x20	/* 1 = when addr as slave */
+#define XIIC_INTR_NAAS_MASK		  0x40	/* 1 = not addr as slave  */
+#define XIIC_INTR_TX_HALF_MASK		  0x80	/* 1 = TX FIFO half empty */
+
+/* IPIF Device Interrupt Register masks */
+
+#define XIIC_IPIF_IIC_MASK	    0x00000004UL    /* 1=inter enabled */
+#define XIIC_IPIF_ERROR_MASK	    0x00000001UL    /* 1=inter enabled */
+#define XIIC_IPIF_INTER_ENABLE_MASK  (XIIC_IPIF_IIC_MASK |  \
+				      XIIC_IPIF_ERROR_MASK)
+
+#define XIIC_TX_ADDR_SENT	      0x00
+#define XIIC_TX_ADDR_MSTR_RECV_MASK   0x02
+
+/* The following constants specify the depth of the FIFOs */
+
+#define IIC_RX_FIFO_DEPTH	  16   /* Rx fifo capacity		 */
+#define IIC_TX_FIFO_DEPTH	  16   /* Tx fifo capacity		 */
+
+/* The following constants specify groups of interrupts that are typically
+ * enabled or disables at the same time
+ */
+#define XIIC_TX_INTERRUPTS					    \
+	    (XIIC_INTR_TX_ERROR_MASK | XIIC_INTR_TX_EMPTY_MASK |    \
+	     XIIC_INTR_TX_HALF_MASK)
+
+#define XIIC_TX_RX_INTERRUPTS (XIIC_INTR_RX_FULL_MASK | XIIC_TX_INTERRUPTS)
+
+/* The following constants are used with the following macros to specify the
+ * operation, a read or write operation.
+ */
+#define XIIC_READ_OPERATION  1
+#define XIIC_WRITE_OPERATION 0
+
+/* The following constants are used with the transmit FIFO fill function to
+ * specify the role which the IIC device is acting as, a master or a slave.
+ */
+#define XIIC_MASTER_ROLE     1
+#define XIIC_SLAVE_ROLE	     0
+
+/**************************** Type Definitions ******************************/
+
+
+/***************** Macros (Inline Functions) Definitions ********************/
+
+
+/************************** Function Prototypes *****************************/
+
+unsigned XIic_Recv(u32 BaseAddress, u8 Address,
+		   u8 *BufferPtr, unsigned ByteCount);
+
+unsigned XIic_Send(u32 BaseAddress, u8 Address,
+		   u8 *BufferPtr, unsigned ByteCount);
+
+#endif		  /* end of protection macro */