* Patches by Denis Peter, 9 Sep 2003:

  add FAT support for IDE, SCSI and USB

* Patches by Gleb Natapov, 2 Sep 2003:
  - cleanup of POST code for unsupported architectures
  - MPC824x locks way0 of data cache for use as initial RAM;
    this patch unlocks it after relocation to RAM and invalidates
    the locked entries.

* Patch by Gleb Natapov, 30 Aug 2003:
  new I2C driver for mpc107 bridge. Now works from flash.

* Patch by Dave Ellis, 11 Aug 2003:
  - JFFS2: fix typo in common/cmd_jffs2.c
  - JFFS2: fix CFG_JFFS2_SORT_FRAGMENTS option
  - JFFS2: remove node version 0 warning
  - JFFS2: accept JFFS2 PADDING nodes
  - SXNI855T: add AM29LV800 support
  - SXNI855T: move environment from EEPROM to flash
  - SXNI855T: boot from JFFS2 in NOR or NAND flash

* Patch by Bill Hargen, 11 Aug 2003:
  fixes for I2C on MPC8240
  - fix i2c_write routine
  - fix iprobe command
  - eliminates use of global variables, plus dead code, cleanup.

1 files changed, 0 insertions, 1243 deletions

diff --git a/cpu/mpc824x/drivers/i2c/i2c1.c b/cpu/mpc824x/drivers/i2c/i2c1.c
deleted file mode 100644
index 94c671e..0000000
--- a/cpu/mpc824x/drivers/i2c/i2c1.c
+++ /dev/null
@@ -1,1243 +0,0 @@
-/*************************************************************
- *
- * Copyright @ Motorola, 1999
- *
- ************************************************************/
-#include <common.h>
-
-#ifdef CONFIG_HARD_I2C
-#include <i2c.h>
-#include "i2c_export.h"
-#include "i2c.h"
-
-#undef  I2CDBG0
-#undef  DEBUG
-
-/* Define a macro to use an optional application-layer print function, if
- * one was passed to the I2C library during initialization.  If there was
- * no function pointer passed, this protects against calling it.  Also define
- * the global variable that holds the passed pointer.
- */
-#define TIMEOUT (CFG_HZ/4)
-#define PRINT if ( app_print ) app_print
-static int (*app_print) (char *, ...);
-
-/******************* Internal to I2C Driver *****************/
-static unsigned int ByteToXmit = 0;
-static unsigned int XmitByte = 0;
-static unsigned char *XmitBuf = 0;
-static unsigned int XmitBufEmptyStop = 0;
-static unsigned int ByteToRcv = 0;
-static unsigned int RcvByte = 0;
-static unsigned char *RcvBuf = 0;
-static unsigned int RcvBufFulStop = 0;
-static unsigned int MasterRcvAddress = 0;
-
-/* Set by call to get_eumbbar during I2C_Initialize.
- * This could be globally available to the I2C library, but there is
- * an advantage to passing it as a parameter: it is already in a register
- * and doesn't have to be loaded from memory.  Also, that is the way the
- * I2C library was already implemented and I don't want to change it without
- * a more detailed analysis.
- * It is being set as a global variable in I2C_Initialize to hide it from
- * the DINK application layer, because it is Kahlua-specific.  I think that
- * get_eumbbar, load_runtime_reg, and store_runtime_reg should be defined in
- * a Kahlua-specific library dealing with the embedded utilities memory block.
- * Right now, get_eumbbar is defined in dink32/kahlua.s.  The other two are
- * defined in dink32/drivers/i2c/i2c2.s.
- */
-static unsigned int Global_eumbbar = 0;
-
-extern unsigned int load_runtime_reg (unsigned int eumbbar,
-				      unsigned int reg);
-
-extern unsigned int store_runtime_reg (unsigned int eumbbar,
-				       unsigned int reg, unsigned int val);
-
-/************************** API *****************/
-
-/* Application Program Interface (API) are the calls provided by the I2C
- * library to upper layer applications (i.e., DINK) to access the Kahlua
- * I2C bus interface.  The functions and values that are part of this API
- * are declared in i2c_export.h.
- */
-
-/*  Initialize I2C unit with the following:
- *  driver's slave address
- *  interrupt enabled
- *  optional pointer to application layer print function
- *
- *  These parameters may be added:
- *  desired clock rate
- *  digital filter frequency sampling rate
- *
- *  This function must be called before I2C unit can be used.
- */
-I2C_Status I2C_Initialize (unsigned char addr,
-			   I2C_INTERRUPT_MODE en_int,
-			   int (*p) (char *, ...))
-{
-	I2CStatus status;
-
-	/* establish the pointer, if there is one, to the application's "printf" */
-	app_print = p;
-
-	/* If this is the first call, get the embedded utilities memory block
-	 * base address.  I'm not sure what to do about error handling here:
-	 * if a non-zero value is returned, accept it.
-	 */
-	if (Global_eumbbar == 0)
-		Global_eumbbar = get_eumbbar ();
-	if (Global_eumbbar == 0) {
-		PRINT ("I2C_Initialize: can't find EUMBBAR\n");
-		return I2C_ERROR;
-	}
-
-	/* validate the I2C address */
-	if (addr & 0x80) {
-		PRINT ("I2C_Initialize, I2C address invalid:  %d 0x%x\n",
-			   (unsigned int) addr, (unsigned int) addr);
-		return I2C_ERROR;
-	}
-
-	/* Call the internal I2C library function to perform work.
-	 * Accept the default frequency sampling rate (no way to set it currently,
-	 * via I2C_Init) and set the clock frequency to something reasonable.
-	 */
-	status = I2C_Init (Global_eumbbar, (unsigned char) 0x31, addr, en_int);
-	if (status != I2CSUCCESS) {
-		PRINT ("I2C_Initialize: error in initiation\n");
-		return I2C_ERROR;
-	}
-
-	/* all is well */
-	return I2C_SUCCESS;
-}
-
-
-/* Perform the given I2C transaction, only MASTER_XMIT and MASTER_RCV
- * are implemented.  Both are only in polling mode.
- *
- * en_int controls interrupt/polling mode
- * act is the type of transaction
- * i2c_addr is the I2C address of the slave device
- * data_addr is the address of the data on the slave device
- * len is the length of data to send or receive
- * buffer is the address of the data buffer
- * stop = I2C_NO_STOP, don't signal STOP at end of transaction
- *	  I2C_STOP, signal STOP at end of transaction
- * retry is the timeout retry value, currently ignored
- * rsta = I2C_NO_RESTART, this is not continuation of existing transaction
- *	  I2C_RESTART, this is a continuation of existing transaction
- */
-I2C_Status I2C_do_transaction ( I2C_INTERRUPT_MODE en_int,
-				I2C_TRANSACTION_MODE act,
-				unsigned char i2c_addr,
-				unsigned char data_addr,
-				int len,
-				char *buffer,
-				I2C_STOP_MODE stop,
-				int retry, I2C_RESTART_MODE rsta)
-{
-	I2C_Status status;
-	unsigned char data_addr_buffer[1];
-
-#if 1
-/* This is a temporary work-around.  The I2C library breaks the protocol
- * if it attempts to handle a data transmission in more than one
- * transaction, so the data address and the actual data bytes are put
- * into a single buffer before sending it to the library internal functions.
- * The problem is related to being able to restart a transaction without
- * sending the I2C device address or repeating the data address.  It may take
- * a day or two to sort it all out, so I'll have to get back to it later.
- * Look at I2C_Start to see about using some status flags (I'm not sure that
- * "stop" and "rsta" are enough to reflect the states, maybe so; but the logic
- * in the library is insufficient) to control correct handling of the protocol.
- */
-	unsigned char dummy_buffer[257];
-
-	if (act == I2C_MASTER_XMIT) {
-		int i;
-
-		if (len > 256)
-			return I2C_ERROR;
-		for (i = 1; i <= len; i++)
-			dummy_buffer[i] = buffer[i - 1];
-		dummy_buffer[0] = data_addr;
-		status = I2C_do_buffer (en_int, act, i2c_addr, 1 + len,
-					dummy_buffer, stop, retry, rsta);
-		if (status != I2C_SUCCESS) {
-			PRINT ("I2C_do_transaction: can't perform data transfer\n");
-			return I2C_ERROR;
-		}
-		return I2C_SUCCESS;
-	}
-#endif	/* end of temp work-around */
-
-	/* validate requested transaction type */
-	if ((act != I2C_MASTER_XMIT) && (act != I2C_MASTER_RCV)) {
-		PRINT ("I2C_do_transaction, invalid transaction request:  %d\n",
-			act);
-		return I2C_ERROR;
-	}
-
-	/* range check the I2C address */
-	if (i2c_addr & 0x80) {
-		PRINT ("I2C_do_transaction, I2C address out of range:  %d 0x%x\n",
-			(unsigned int) i2c_addr, (unsigned int) i2c_addr);
-		return I2C_ERROR;
-	} else {
-		data_addr_buffer[0] = data_addr;
-	}
-
-	/*
-	 * We first have to contact the slave device and transmit the
-	 * data address. Be careful about the STOP and restart stuff.
-	 * We don't want to signal STOP after sending the data
-	 * address, but this could be a continuation if the
-	 * application didn't release the bus after the previous
-	 * transaction, by not sending a STOP after it.
-	 */
-	status = I2C_do_buffer (en_int, I2C_MASTER_XMIT, i2c_addr, 1,
-				data_addr_buffer, I2C_NO_STOP, retry, rsta);
-	if (status != I2C_SUCCESS) {
-		PRINT ("I2C_do_transaction: can't send data address for read\n");
-		return I2C_ERROR;
-	}
-
-	/* The data transfer will be a continuation. */
-	rsta = I2C_RESTART;
-
-	/* now handle the user data */
-	status = I2C_do_buffer (en_int, act, i2c_addr, len,
-				buffer, stop, retry, rsta);
-	if (status != I2C_SUCCESS) {
-		PRINT ("I2C_do_transaction: can't perform data transfer\n");
-		return I2C_ERROR;
-	}
-
-	/* all is well */
-	return I2C_SUCCESS;
-}
-
-/* This function performs the work for I2C_do_transaction.  The work is
- * split into this function to enable I2C_do_transaction to first transmit
- * the data address to the I2C slave device without putting the data address
- * into the first byte of the buffer.
- *
- * en_int controls interrupt/polling mode
- * act is the type of transaction
- * i2c_addr is the I2C address of the slave device
- * len is the length of data to send or receive
- * buffer is the address of the data buffer
- * stop = I2C_NO_STOP, don't signal STOP at end of transaction
- *	  I2C_STOP, signal STOP at end of transaction
- * retry is the timeout retry value, currently ignored
- * rsta = I2C_NO_RESTART, this is not continuation of existing transaction
- *	  I2C_RESTART, this is a continuation of existing transaction
- */
-static I2C_Status I2C_do_buffer (I2C_INTERRUPT_MODE en_int,
-				 I2C_TRANSACTION_MODE act,
-				 unsigned char i2c_addr,
-				 int len,
-				 unsigned char *buffer,
-				 I2C_STOP_MODE stop,
-				 int retry, I2C_RESTART_MODE rsta)
-{
-	I2CStatus rval;
-	unsigned int dev_stat;
-
-	if (act == I2C_MASTER_RCV) {
-		/* set up for master-receive transaction */
-		rval = I2C_get (Global_eumbbar, i2c_addr, buffer, len, stop, rsta);
-	} else {
-		/* set up for master-transmit transaction */
-		rval = I2C_put (Global_eumbbar, i2c_addr, buffer, len, stop, rsta);
-	}
-
-	/* validate the setup */
-	if (rval != I2CSUCCESS) {
-		dev_stat = load_runtime_reg (Global_eumbbar, I2CSR);
-		PRINT ("Error(I2C_do_buffer): control phase, code(0x%08x), status(0x%08x)\n", rval, dev_stat);
-		I2C_Stop (Global_eumbbar);
-		return I2C_ERROR;
-	}
-
-	if (en_int == 1) {
-		/* this should not happen, no interrupt handling yet */
-		return I2C_SUCCESS;
-	}
-
-	/* this performs the polling action, when the transfer is completed,
-	 * the status returned from I2C_Timer_Event will be I2CBUFFFULL or
-	 * I2CBUFFEMPTY (rcv or xmit), I2CSUCCESS or I2CADDRESS indicates the
-	 * transaction is not yet complete, anything else is an error.
-	 */
-	while (rval == I2CSUCCESS || rval == I2CADDRESS) {
-		int timeval = get_timer (0);
-
-		/* poll the device until something happens */
-		do {
-			rval = I2C_Timer_Event (Global_eumbbar, 0);
-		}
-		while (rval == I2CNOEVENT && get_timer (timeval) < TIMEOUT);
-
-		/* check for error condition */
-		if (rval == I2CSUCCESS   ||
-		    rval == I2CBUFFFULL  ||
-		    rval == I2CBUFFEMPTY ||
-		    rval == I2CADDRESS) {
-			;	/* do nothing */
-		} else {
-			/* report the error condition */
-			dev_stat = load_runtime_reg (Global_eumbbar, I2CSR);
-			PRINT ("Error(I2C_do_buffer):  code(0x%08x), status(0x%08x)\n",
-				   rval, dev_stat);
-			return I2C_ERROR;
-		}
-	}
-
-	/* all is well */
-	return I2C_SUCCESS;
-}
-
-/**
- * Note:
- *
- * In all following functions,
- * the caller shall pass the configured embedded utility memory
- * block base, EUMBBAR.
- **/
-
-/***********************************************************
- * function: I2C_put
- *
- * description:
-   Send a buffer of data to the intended rcv_addr.
- * If stop_flag is set, after the whole buffer
- * is sent, generate a STOP signal provided that the
- * receiver doesn't signal the STOP in the middle.
- * I2C is the master performing transmitting. If
- * no STOP signal is generated at the end of current
- * transaction, the master can generate a START signal
- * to another slave addr.
- *
- * note: this is master xmit API
- *********************************************************/
-static I2CStatus I2C_put (unsigned int eumbbar, unsigned char rcv_addr,	/* receiver's address */
-	  unsigned char *buffer_ptr,	/* pointer of data to be sent */
-	  unsigned int length,	/* number of byte of in the buffer */
-	  unsigned int stop_flag,	/* 1 - signal STOP when buffer is empty
-					 * 0 - no STOP signal when buffer is empty
-					 */
-	  unsigned int is_cnt)
-{					/* 1 - this is a restart, don't check MBB
-					 * 0 - this is a new start, check MBB
-					 */
-	if (buffer_ptr == 0 || length == 0) {
-		return I2CERROR;
-	}
-#ifdef I2CDBG0
-	PRINT ("%s(%d): I2C_put\n", __FILE__, __LINE__);
-#endif
-
-	XmitByte = 0;
-	ByteToXmit = length;
-	XmitBuf = buffer_ptr;
-	XmitBufEmptyStop = stop_flag;
-
-	RcvByte = 0;
-	ByteToRcv = 0;
-	RcvBuf = 0;
-
-	/* we are the master, start transaction */
-	return I2C_Start (eumbbar, rcv_addr, XMIT, is_cnt);
-}
-
-/***********************************************************
- * function: I2C_get
- *
- * description:
- * Receive a buffer of data from the desired sender_addr
- * If stop_flag is set, when the buffer is full and the
- * sender does not signal STOP, generate a STOP signal.
- * I2C is the master performing receiving. If no STOP signal
- * is generated, the master can generate a START signal
- * to another slave addr.
- *
- * note: this is master receive API
- **********************************************************/
-static I2CStatus I2C_get (unsigned int eumbbar, unsigned char rcv_from,	/* sender's address */
-		  unsigned char *buffer_ptr,	/* pointer of receiving buffer */
-		  unsigned int length,	/* length of the receiving buffer */
-		  unsigned int stop_flag,	/* 1 - signal STOP when buffer is full
-						 * 0 - no STOP signal when buffer is full
-						 */
-		  unsigned int is_cnt)
-{						/* 1 - this is a restart, don't check MBB
-						 * 0 - this is a new start, check MBB
-						 */
-	if (buffer_ptr == 0 || length == 0) {
-		return I2CERROR;
-	}
-#ifdef I2CDBG0
-	PRINT ("%s(%d): I2C_get\n", __FILE__, __LINE__);
-#endif
-
-	RcvByte = 0;
-	ByteToRcv = length;
-	RcvBuf = buffer_ptr;
-	RcvBufFulStop = stop_flag;
-
-	XmitByte = 0;
-	ByteToXmit = 0;
-	XmitBuf = 0;
-
-	/* we are the master, start the transaction */
-	return I2C_Start (eumbbar, rcv_from, RCV, is_cnt);
-
-}
-
-#if 0	/* turn off dead code */
-/*********************************************************
- * function: I2C_write
- *
- * description:
- * Send a buffer of data to the requiring master.
- * If stop_flag is set, after the whole buffer is sent,
- * generate a STOP signal provided that the requiring
- * receiver doesn't signal the STOP in the middle.
- * I2C is the slave performing transmitting.
- *
- * Note: this is slave xmit API.
- *
- *       due to the current Kahlua design, slave transmitter
- *       shall not signal STOP since there is no way
- *       for master to detect it, causing I2C bus hung.
- *
- *       For the above reason, the stop_flag is always
- *       set, i.e., 0.
- *
- *       programmer shall use the timer on Kahlua to
- *       control the interval of data byte at the
- *       master side.
- *******************************************************/
-static I2CStatus I2C_write (unsigned int eumbbar, unsigned char *buffer_ptr,	/* pointer of data to be sent */
-		unsigned int length,	/* number of byte of in the buffer */
-		unsigned int stop_flag)
-{					/* 1 - signal STOP when buffer is empty
-					 * 0 - no STOP signal when buffer is empty
-					 */
-	if (buffer_ptr == 0 || length == 0) {
-		return I2CERROR;
-	}
-
-	XmitByte = 0;
-	ByteToXmit = length;
-	XmitBuf = buffer_ptr;
-	XmitBufEmptyStop = 0;	/* in order to avoid bus hung, ignored the user's stop_flag */
-
-	RcvByte = 0;
-	ByteToRcv = 0;
-	RcvBuf = 0;
-
-	/* we are the slave, just wait for being called, or pull */
-	/* I2C_Timer_Event( eumbbar ); */
-}
-
-/******************************************************
- * function: I2C_read
- *
- * description:
- * Receive a buffer of data from the sending master.
- * If stop_flag is set, when the buffer is full and the
- * sender does not signal STOP, generate a STOP signal.
- * I2C is the slave performing receiving.
- *
- * note: this is slave receive API
- ****************************************************/
-static I2CStatus I2C_read (unsigned int eumbbar, unsigned char *buffer_ptr,	/* pointer of receiving buffer */
-		   unsigned int length,	/* length of the receiving buffer */
-		   unsigned int stop_flag)
-{					/* 1 - signal STOP when buffer is full
-					 * 0 - no STOP signal when buffer is full
-					 */
-	if (buffer_ptr == 0 || length == 0) {
-		return I2CERROR;
-	}
-
-	RcvByte = 0;
-	ByteToRcv = length;
-	RcvBuf = buffer_ptr;
-	RcvBufFulStop = stop_flag;
-
-	XmitByte = 0;
-	ByteToXmit = 0;
-	XmitBuf = 0;
-
-	/* wait for master to call us, or poll */
-	/* I2C_Timer_Event( eumbbar ); */
-}
-#endif	/* turn off dead code */
-
-/*********************************************************
- * function: I2c_Timer_Event
- *
- * description:
- * if interrupt is not used, this is the timer event handler.
- * After each fixed time interval, this function can be called
- * to check the I2C status and call appropriate function to
- * handle the status event.
- ********************************************************/
-static I2CStatus I2C_Timer_Event (unsigned int eumbbar,
-				  I2CStatus (*handler) (unsigned int))
-{
-	I2C_STAT stat;
-
-#ifdef I2CDBG0
-	PRINT ("%s(%d): I2C_Timer_Event\n", __FILE__, __LINE__);
-#endif
-
-	stat = I2C_Get_Stat (eumbbar);
-
-	if (stat.mif == 1) {
-		if (handler == 0) {
-			return I2C_ISR (eumbbar);
-		} else {
-			return (*handler) (eumbbar);
-		}
-	}
-
-	return I2CNOEVENT;
-}
-
-
-/****************** Device I/O function *****************/
-
-/******************************************************
- * function: I2C_Start
- *
- * description: Generate a START signal in the desired mode.
- *		I2C is the master.
- *
- *		Return I2CSUCCESS if no error.
- *
- * note:
- ****************************************************/
-static I2CStatus I2C_Start (unsigned int eumbbar, unsigned char slave_addr,	/* address of the receiver */
-			I2C_MODE mode,	/* XMIT(1) - put (write)
-					 * RCV(0)  - get (read)
-					 */
-			unsigned int is_cnt)
-{					/* 1 - this is a restart, don't check MBB
-					 * 0 - this is a new start
-					 */
-	unsigned int tmp = 0;
-	I2C_STAT stat;
-	I2C_CTRL ctrl;
-
-#ifdef I2CDBG0
-	PRINT ("%s(%d): I2C_Start addr 0x%x mode %d cnt %d\n", __FILE__,
-		   __LINE__, slave_addr, mode, is_cnt);
-#endif
-
-	ctrl = I2C_Get_Ctrl (eumbbar);
-
-	/* first make sure I2C has been initialized */
-	if (ctrl.men == 0) {
-		return I2CERROR;
-	}
-
-	/* next make sure bus is idle */
-	stat = I2C_Get_Stat (eumbbar);
-
-	if (is_cnt == 0 && stat.mbb == 1) {
-		/* sorry, we lost */
-		return I2CBUSBUSY;
-	} else if (is_cnt == 1 && stat.mif == 1 && stat.mal == 0) {
-		/* sorry, we lost the bus */
-		return I2CALOSS;
-	}
-
-
-	/* OK, I2C is enabled and we have the bus */
-
-	/* prepare to write the slave address */
-	ctrl.msta = 1;
-	ctrl.mtx = 1;
-	ctrl.txak = 0;
-	ctrl.rsta = is_cnt;		/* set the repeat start bit */
-	I2C_Set_Ctrl (eumbbar, ctrl);
-
-	/* write the slave address and xmit/rcv mode bit */
-	tmp = load_runtime_reg (eumbbar, I2CDR);
-	tmp = (tmp & 0xffffff00) |
-	      ((slave_addr & 0x007f) << 1) |
-	      (mode == XMIT ? 0x0 : 0x1);
-	store_runtime_reg (eumbbar, I2CDR, tmp);
-
-	if (mode == RCV) {
-		MasterRcvAddress = 1;
-	} else {
-		MasterRcvAddress = 0;
-	}
-
-#ifdef I2CDBG0
-	PRINT ("%s(%d): I2C_Start exit\n", __FILE__, __LINE__);
-#endif
-
-	/* wait for the interrupt or poll  */
-	return I2CSUCCESS;
-}
-
-/***********************************************************
- * function: I2c_Stop
- *
- * description: Generate a STOP signal to terminate the master
- *		transaction.
- *		return I2CSUCCESS
- *
- **********************************************************/
-static I2CStatus I2C_Stop (unsigned int eumbbar)
-{
-	I2C_CTRL ctrl;
-
-#ifdef I2CDBG0
-	PRINT ("%s(%d): I2C_Stop enter\n", __FILE__, __LINE__);
-#endif
-
-	ctrl = I2C_Get_Ctrl (eumbbar);
-	ctrl.msta = 0;
-	I2C_Set_Ctrl (eumbbar, ctrl);
-
-#ifdef I2CDBG0
-	PRINT ("%s(%d): I2C_Stop exit\n", __FILE__, __LINE__);
-#endif
-
-	return I2CSUCCESS;
-}
-
-/****************************************************
- * function: I2C_Master_Xmit
- *
- * description: Master sends one byte of data to
- *		slave target
- *
- *		return I2CSUCCESS if the byte transmitted.
- *		Otherwise no-zero
- *
- * Note: condition must meet when this function is called:
- *       I2CSR(MIF) == 1 && I2CSR(MCF)  == 1  && I2CSR(RXAK) == 0
- *       I2CCR(MSTA) == 1  && I2CCR(MTX) == 1
- *
- ***************************************************/
-static I2CStatus I2C_Master_Xmit (unsigned int eumbbar)
-{
-	unsigned int val;
-
-	if (ByteToXmit > 0) {
-
-		if (ByteToXmit == XmitByte) {
-			/* all xmitted */
-			ByteToXmit = 0;
-
-			if (XmitBufEmptyStop == 1) {
-				I2C_Stop (eumbbar);
-			}
-
-			return I2CBUFFEMPTY;
-
-		}
-#ifdef I2CDBG0
-		PRINT ("%s(%d): xmit 0x%02x\n", __FILE__, __LINE__,
-			   *(XmitBuf + XmitByte));
-#endif
-
-		val = *(XmitBuf + XmitByte);
-		val &= 0x000000ff;
-		store_runtime_reg (eumbbar, I2CDR, val);
-		XmitByte++;
-
-		return I2CSUCCESS;
-
-	}
-
-	return I2CBUFFEMPTY;
-}
-
-/***********************************************
- * function: I2C_Master_Rcv
- *
- * description: master reads one byte data
- *		from slave source
- *
- *		return I2CSUCCESS if no error
- *
- * Note: condition must meet when this function is called:
- *       I2CSR(MIF) == 1 && I2CSR(MCF) == 1 &&
- *       I2CCR(MSTA) == 1 && I2CCR(MTX) == 0
- *
- ***********************************************/
-static I2CStatus I2C_Master_Rcv (unsigned int eumbbar)
-{
-	I2C_CTRL ctrl;
-	unsigned int val;
-
-	if (ByteToRcv > 0) {
-
-		if (ByteToRcv - RcvByte == 2 && RcvBufFulStop == 1) {
-			/* master requests more than or equal to 2 bytes
-			 * we are reading 2nd to last byte
-			 */
-
-			/* we need to set I2CCR(TXAK) to generate a STOP */
-			ctrl = I2C_Get_Ctrl (eumbbar);
-			ctrl.txak = 1;
-			I2C_Set_Ctrl (eumbbar, ctrl);
-
-			/* Kahlua will automatically generate a STOP
-			 * next time a transaction happens
-			 */
-
-			/* note: the case of master requesting one byte is
-			 *       handled in I2C_ISR
-			 */
-		}
-
-		/* generat a STOP before reading the last byte */
-		if (RcvByte + 1 == ByteToRcv && RcvBufFulStop == 1) {
-			I2C_Stop (eumbbar);
-		}
-
-		val = load_runtime_reg (eumbbar, I2CDR);
-		*(RcvBuf + RcvByte) = val & 0xFF;
-
-#ifdef I2CDBG0
-		PRINT ("%s(%d): rcv 0x%02x\n", __FILE__, __LINE__,
-			   *(RcvBuf + RcvByte));
-#endif
-
-		RcvByte++;
-
-		if (ByteToRcv == RcvByte) {
-			ByteToRcv = 0;
-
-			return I2CBUFFFULL;
-		}
-
-		return I2CSUCCESS;
-	}
-
-	return I2CBUFFFULL;
-
-}
-
-/****************************************************
- * function: I2C_Slave_Xmit
- *
- * description: Slave sends one byte of data to
- *		requesting destination
- *
- *	  return SUCCESS if the byte transmitted. Otherwise
- *	  No-zero
- *
- * Note: condition must meet when this function is called:
- *       I2CSR(MIF) == 1 && I2CSR(MCF) == 1 &&  I2CSR(RXAK) = 0
- *       I2CCR(MSTA) == 0  && I2CCR(MTX) == 1
- *
- ***************************************************/
-static I2CStatus I2C_Slave_Xmit (unsigned int eumbbar)
-{
-	unsigned int val;
-
-	if (ByteToXmit > 0) {
-
-		if (ByteToXmit == XmitByte) {
-			/* no more data to send */
-			ByteToXmit = 0;
-
-			/*
-			 * do not toggle I2CCR(MTX). Doing so will
-			 * cause bus-hung since current Kahlua design
-			 * does not give master a way to detect slave
-			 * stop. It is always a good idea for master
-			 * to use timer to prevent the long long
-			 * delays
-			 */
-
-			return I2CBUFFEMPTY;
-		}
-#ifdef I2CDBG
-		PRINT ("%s(%d): xmit 0x%02x\n", __FILE__, __LINE__,
-			   *(XmitBuf + XmitByte));
-#endif
-
-		val = *(XmitBuf + XmitByte);
-		val &= 0x000000ff;
-		store_runtime_reg (eumbbar, I2CDR, val);
-		XmitByte++;
-
-		return I2CSUCCESS;
-	}
-
-	return I2CBUFFEMPTY;
-}
-
-/***********************************************
- * function: I2C_Slave_Rcv
- *
- * description: slave reads one byte data
- *		from master source
- *
- *		return I2CSUCCESS if no error otherwise non-zero
- *
- * Note: condition must meet when this function is called:
- *       I2CSR(MIF) == 1 && I2CSR(MCF) == 1 &&
- *       I2CCR(MSTA) == 0 && I2CCR(MTX)  = 0
- *
- ***********************************************/
-static I2CStatus I2C_Slave_Rcv (unsigned int eumbbar)
-{
-	unsigned int val;
-	I2C_CTRL ctrl;
-
-	if (ByteToRcv > 0) {
-		val = load_runtime_reg (eumbbar, I2CDR);
-		*(RcvBuf + RcvByte) = val & 0xff;
-#ifdef I2CDBG
-		PRINT ("%s(%d): rcv 0x%02x\n", __FILE__, __LINE__,
-			   *(RcvBuf + RcvByte));
-#endif
-		RcvByte++;
-
-		if (ByteToRcv == RcvByte) {
-			if (RcvBufFulStop == 1) {
-				/* all done */
-				ctrl = I2C_Get_Ctrl (eumbbar);
-				ctrl.txak = 1;
-				I2C_Set_Ctrl (eumbbar, ctrl);
-			}
-
-			ByteToRcv = 0;
-			return I2CBUFFFULL;
-		}
-
-		return I2CSUCCESS;
-	}
-
-	return I2CBUFFFULL;
-}
-
-/****************** Device Control Function *************/
-
-/*********************************************************
- * function: I2C_Init
- *
- * description: Initialize I2C unit with desired frequency divider,
- *		master's listening address, with interrupt enabled
- *		or disabled.
- *
- * note:
- ********************************************************/
-static I2CStatus I2C_Init (unsigned int eumbbar, unsigned char fdr,	/* frequency divider */
-		   unsigned char slave_addr,	/* driver's address used for receiving */
-		   unsigned int en_int)
-{						/* 1 - enable I2C interrupt
-						 * 0 - disable I2C interrup
-						 */
-	I2C_CTRL ctrl;
-	unsigned int tmp;
-
-#ifdef I2CDBG0
-	PRINT ("%s(%d): I2C_Init enter\n", __FILE__, __LINE__);
-#endif
-
-	ctrl = I2C_Get_Ctrl (eumbbar);
-	/* disable the I2C module before we change everything */
-	ctrl.men = 0;
-	I2C_Set_Ctrl (eumbbar, ctrl);
-
-	/* set the frequency diver */
-	tmp = load_runtime_reg (eumbbar, I2CFDR);
-	tmp = (tmp & 0xffffffc0) | (fdr & 0x3f);
-	store_runtime_reg (eumbbar, I2CFDR, tmp);
-
-	/* Set our listening (slave) address */
-	tmp = load_runtime_reg (eumbbar, I2CADR);
-	tmp = (tmp & 0xffffff01) | ((slave_addr & 0x7f) << 1);
-	store_runtime_reg (eumbbar, I2CADR, tmp);
-
-	/* enable I2C with desired interrupt setting */
-	ctrl.men = 1;
-	ctrl.mien = en_int & 0x1;
-	I2C_Set_Ctrl (eumbbar, ctrl);
-#ifdef I2CDBG0
-	PRINT ("%s(%d): I2C_Init exit\n", __FILE__, __LINE__);
-#endif
-
-	return I2CSUCCESS;
-
-}
-
-/*****************************************
- * function I2c_Get_Stat
- *
- * description: Query I2C Status, i.e., read I2CSR
- *
- ****************************************/
-static I2C_STAT I2C_Get_Stat (unsigned int eumbbar)
-{
-	unsigned int temp;
-	I2C_STAT stat;
-
-	temp = load_runtime_reg (eumbbar, I2CSR);
-
-#ifdef I2CDBG0
-	PRINT ("%s(%d): get stat = 0x%08x\n", __FILE__, __LINE__, temp);
-#endif
-
-	stat.rsrv0 = (temp & 0xffffff00) >> 8;
-	stat.mcf   = (temp & 0x00000080) >> 7;
-	stat.maas  = (temp & 0x00000040) >> 6;
-	stat.mbb   = (temp & 0x00000020) >> 5;
-	stat.mal   = (temp & 0x00000010) >> 4;
-	stat.rsrv1 = (temp & 0x00000008) >> 3;
-	stat.srw   = (temp & 0x00000004) >> 2;
-	stat.mif   = (temp & 0x00000002) >> 1;
-	stat.rxak  = (temp & 0x00000001);
-	return stat;
-}
-
-/*********************************************
- * function: I2c_Set_Ctrl
- *
- * description: Change I2C Control bits,
- *		i.e., write to I2CCR
- *
- ********************************************/
-static void I2C_Set_Ctrl (unsigned int eumbbar, I2C_CTRL ctrl)
-{						/* new control value */
-	unsigned int temp = load_runtime_reg (eumbbar, I2CCR);
-
-	temp &= 0xffffff03;
-	temp |= ((ctrl.men  & 0x1) << 7);
-	temp |= ((ctrl.mien & 0x1) << 6);
-	temp |= ((ctrl.msta & 0x1) << 5);
-	temp |= ((ctrl.mtx  & 0x1) << 4);
-	temp |= ((ctrl.txak & 0x1) << 3);
-	temp |= ((ctrl.rsta & 0x1) << 2);
-#ifdef I2CDBG0
-	PRINT ("%s(%d): set ctrl = 0x%08x\n", __FILE__, __LINE__, temp);
-#endif
-	store_runtime_reg (eumbbar, I2CCR, temp);
-
-}
-
-/*****************************************
- * function: I2C_Get_Ctrl
- *
- * description: Query I2C Control bits,
- *		i.e., read I2CCR
- *****************************************/
-static I2C_CTRL I2C_Get_Ctrl (unsigned int eumbbar)
-{
-	union {
-		I2C_CTRL ctrl;
-		unsigned int temp;
-	} s;
-
-	s.temp = load_runtime_reg (eumbbar, I2CCR);
-#ifdef I2CDBG0
-	PRINT ("%s(%d): get ctrl = 0x%08x\n", __FILE__, __LINE__, s.temp);
-#endif
-
-	return s.ctrl;
-}
-
-
-/****************************************
- * function: I2C_Slave_Addr
- *
- * description: Process slave address phase.
- *		return I2CSUCCESS if no error
- *
- * note: Precondition for calling this function:
- *       I2CSR(MIF) == 1 &&
- *       I2CSR(MAAS) == 1
- ****************************************/
-static I2CStatus I2C_Slave_Addr (unsigned int eumbbar)
-{
-	I2C_STAT stat = I2C_Get_Stat (eumbbar);
-	I2C_CTRL ctrl = I2C_Get_Ctrl (eumbbar);
-
-	if (stat.srw == 1) {
-		/* we are asked to xmit */
-		ctrl.mtx = 1;
-		I2C_Set_Ctrl (eumbbar, ctrl);	/* set MTX */
-		return I2C_Slave_Xmit (eumbbar);
-	}
-
-	/* we are asked to receive data */
-	ctrl.mtx = 0;
-	I2C_Set_Ctrl (eumbbar, ctrl);
-	(void) load_runtime_reg (eumbbar, I2CDR);	/* do a fake read to start */
-
-	return I2CADDRESS;
-}
-
-/***********************************************
- * function: I2C_ISR
- *
- * description: I2C Interrupt service routine
- *
- * note: Precondition:
- *      I2CSR(MIF) == 1
- **********************************************/
-static I2CStatus I2C_ISR (unsigned int eumbbar)
-{
-	I2C_STAT stat;
-	I2C_CTRL ctrl;
-
-#ifdef I2CDBG0
-	PRINT ("%s(%d): I2C_ISR\n", __FILE__, __LINE__);
-#endif
-
-	stat = I2C_Get_Stat (eumbbar);
-	ctrl = I2C_Get_Ctrl (eumbbar);
-
-	/* clear MIF */
-	stat.mif = 0;
-
-	/* Now let see what kind of event this is */
-	if (stat.mcf == 1) {
-		/* transfer compete */
-
-		/* clear the MIF bit */
-		I2C_Set_Stat (eumbbar, stat);
-
-		if (ctrl.msta == 1) {
-			/* master */
-			if (ctrl.mtx == 1) {
-				/* check if this is the address phase for master receive */
-				if (MasterRcvAddress == 1) {
-					/* Yes, it is the address phase of master receive */
-					ctrl.mtx = 0;
-					/* now check how much we want to receive */
-					if (ByteToRcv == 1 && RcvBufFulStop == 1) {
-						ctrl.txak = 1;
-					}
-
-					I2C_Set_Ctrl (eumbbar, ctrl);
-					(void) load_runtime_reg (eumbbar, I2CDR);	/* fake read first */
-
-					MasterRcvAddress = 0;
-					return I2CADDRESS;
-
-				}
-
-				/* master xmit */
-				if (stat.rxak == 0) {
-					/* slave has acknowledged */
-					return I2C_Master_Xmit (eumbbar);
-				}
-
-				/* slave has not acknowledged yet, generate a STOP */
-				if (XmitBufEmptyStop == 1) {
-					ctrl.msta = 0;
-					I2C_Set_Ctrl (eumbbar, ctrl);
-				}
-
-				return I2CSUCCESS;
-			}
-
-			/* master receive */
-			return I2C_Master_Rcv (eumbbar);
-		}
-
-		/* slave */
-		if (ctrl.mtx == 1) {
-			/* slave xmit */
-			if (stat.rxak == 0) {
-				/* master has acknowledged */
-				return I2C_Slave_Xmit (eumbbar);
-			}
-
-			/* master has not acknowledged, wait for STOP */
-			/* do nothing for preventing bus from hung */
-			return I2CSUCCESS;
-		}
-
-		/* slave rcv */
-		return I2C_Slave_Rcv (eumbbar);
-
-	} else if (stat.maas == 1) {
-		/* received a call from master */
-
-		/* clear the MIF bit */
-		I2C_Set_Stat (eumbbar, stat);
-
-		/* master is calling us, process the address phase */
-		return I2C_Slave_Addr (eumbbar);
-	} else {
-		/* has to be arbitration lost */
-		stat.mal = 0;
-		I2C_Set_Stat (eumbbar, stat);
-
-		ctrl.msta = 0;			/* return to receive mode */
-		I2C_Set_Ctrl (eumbbar, ctrl);
-	}
-
-	return I2CSUCCESS;
-
-}
-
-/******************************************************
- * function: I2C_Set_Stat
- *
- * description: modify the I2CSR
- *
- *****************************************************/
-static void I2C_Set_Stat (unsigned int eumbbar, I2C_STAT stat)
-{
-	union {
-		unsigned int val;
-		I2C_STAT stat;
-	} s_tmp;
-	union {
-		unsigned int val;
-		I2C_STAT stat;
-	} s;
-
-	s.val = load_runtime_reg (eumbbar, I2CSR);
-	s.val &= 0xffffff08;
-	s_tmp.stat = stat;
-	s.val |= (s_tmp.val & 0xf7);
-
-#ifdef I2CDBG0
-	PRINT ("%s(%d): set stat = 0x%08x\n", __FILE__, __LINE__, s.val);
-#endif
-
-	store_runtime_reg (eumbbar, I2CSR, s.val);
-
-}
-
-/******************************************************
- * The following are routines to glue the rest of
- * U-Boot to the Sandpoint I2C driver.
- *****************************************************/
-
-void i2c_init (int speed, int slaveadd)
-{
-#ifdef CFG_I2C_INIT_BOARD
-	/*
-	 * call board specific i2c bus reset routine before accessing the
-	 * environment, which might be in a chip on that bus. For details
-	 * about this problem see doc/I2C_Edge_Conditions.
-	 */
-	i2c_init_board();
-#endif
-
-#ifdef DEBUG
-	I2C_Initialize (0x7f, 0, (void *) printf);
-#else
-	I2C_Initialize (0x7f, 0, 0);
-#endif
-}
-
-int i2c_probe (uchar chip)
-{
-	int tmp;
-
-	/*
-	 * Try to read the first location of the chip.  The underlying
-	 * driver doesn't appear to support sending just the chip address
-	 * and looking for an <ACK> back.
-	 */
-	udelay(10000);
-	return i2c_read (chip, 0, 1, (char *)&tmp, 1);
-}
-
-int i2c_read (uchar chip, uint addr, int alen, uchar * buffer, int len)
-{
-	I2CStatus status;
-	uchar xaddr[4];
-
-	if (alen > 0) {
-		xaddr[0] = (addr >> 24) & 0xFF;
-		xaddr[1] = (addr >> 16) & 0xFF;
-		xaddr[2] = (addr >> 8) & 0xFF;
-		xaddr[3] = addr & 0xFF;
-
-		status = I2C_do_buffer (0, I2C_MASTER_XMIT, chip, alen,
-					&xaddr[4 - alen], I2C_NO_STOP, 1,
-					I2C_NO_RESTART);
-		if (status != I2C_SUCCESS) {
-			PRINT ("i2c_read: can't send data address for read\n");
-			return 1;
-		}
-	}
-
-	/* The data transfer will be a continuation. */
-	status = I2C_do_buffer (0, I2C_MASTER_RCV, chip, len,
-				buffer, I2C_STOP, 1, (alen > 0 ? I2C_RESTART :
-				I2C_NO_RESTART));
-
-	if (status != I2C_SUCCESS) {
-		PRINT ("i2c_read: can't perform data transfer\n");
-		return 1;
-	}
-
-	return 0;
-}
-
-int i2c_write (uchar chip, uint addr, int alen, uchar * buffer, int len)
-{
-	I2CStatus status;
-	uchar dummy_buffer[I2C_RXTX_LEN + 2];
-	uchar *p;
-	int i;
-
-	/* fill in address in big endian order */
-	for (i=alen-1; i>=0; --i) {
-		buffer[i] = addr & 0xFF;
-		addr >>= 8;
-	}
-	/* fill in data */
-	p = dummy_buffer + alen;
-
-	for (i=0; i<len; ++i)
-		*p++ = *buffer++;
-
-	status = I2C_do_buffer (0, I2C_MASTER_XMIT, chip, alen + len,
-				dummy_buffer, I2C_STOP, 1, I2C_NO_RESTART);
-
-#ifdef CFG_EEPROM_PAGE_WRITE_DELAY_MS
-	udelay(CFG_EEPROM_PAGE_WRITE_DELAY_MS * 1000);
-#endif
-	if (status != I2C_SUCCESS) {
-		PRINT ("i2c_write: can't perform data transfer\n");
-		return 1;
-	}
-
-	return 0;
-}
-
-uchar i2c_reg_read (uchar i2c_addr, uchar reg)
-{
-	char buf[1];
-
-	i2c_init (0, 0);
-
-	i2c_read (i2c_addr, reg, 1, buf, 1);
-
-	return (buf[0]);
-}
-
-void i2c_reg_write (uchar i2c_addr, uchar reg, uchar val)
-{
-	i2c_init (0, 0);
-
-	i2c_write (i2c_addr, reg, 1, &val, 1);
-}
-
-#endif	/* CONFIG_HARD_I2C */