board/keymile/common/common.c - filogic/uboot - Gitiles

 /*
  * (C) Copyright 2008
  * Heiko Schocher, DENX Software Engineering, hs@denx.de.
  *
  * See file CREDITS for list of people who contributed to this
  * project.
  *
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License as
  * published by the Free Software Foundation; either version 2 of
  * the License, or (at your option) any later version.
  *
  * This program is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
  *
  * You should have received a copy of the GNU General Public License
  * along with this program; if not, write to the Free Software
  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  * MA 02111-1307 USA
  */

 #include <common.h>
 #include <mpc8260.h>
 #include <ioports.h>
 #include <malloc.h>
 #include <hush.h>

 #if defined(CONFIG_OF_BOARD_SETUP) && defined(CONFIG_OF_LIBFDT)
 #include <libfdt.h>
 #endif

 #if defined(CONFIG_HARD_I2C) || defined(CONFIG_SOFT_I2C)
 #include <i2c.h>
 #endif
 #include <asm/io.h>

 extern int i2c_soft_read_pin (void);

 int ivm_calc_crc (unsigned char *buf, int len)
 {
 	const unsigned short crc_tab[16] = {
 		0x0000, 0xCC01, 0xD801, 0x1400,
 		0xF001, 0x3C00, 0x2800, 0xE401,
 		0xA001, 0x6C00, 0x7800, 0xB401,
 		0x5000, 0x9C01, 0x8801, 0x4400};

 	unsigned short crc     = 0;   /* final result */
 	unsigned short r1      = 0;   /* temp */
 	unsigned char  byte    = 0;   /* input buffer */
 	int	i;

 	/* calculate CRC from array data */
 	for (i = 0; i < len; i++) {
 		byte = buf[i];

 		/* lower 4 bits */
 		r1 = crc_tab[crc & 0xF];
 		crc = ((crc) >> 4) & 0x0FFF;
 		crc = crc ^ r1 ^ crc_tab[byte & 0xF];

 		/* upper 4 bits */
 		r1 = crc_tab[crc & 0xF];
 		crc = (crc >> 4) & 0x0FFF;
 		crc = crc ^ r1 ^ crc_tab[(byte >> 4) & 0xF];
 	}
 	return crc;
 }

 static int  ivm_set_value (char *name, char *value)
 {
 	char tempbuf[256];

 	if (value != NULL) {
 		sprintf (tempbuf, "%s=%s", name, value);
 		return set_local_var (tempbuf, 0);
 	} else {
 		unset_local_var (name);
 	}
 	return 0;
 }

 static int ivm_get_value (unsigned char *buf, int len, char *name, int off,
 				int check)
 {
 	unsigned short	val;
 	unsigned char	valbuf[30];

 	if ((buf[off + 0] != buf[off + 2]) &&
 	    (buf[off + 2] != buf[off + 4])) {
 		printf ("%s Error corrupted %s\n", __FUNCTION__, name);
 		val = -1;
 	} else {
 		val = buf[off + 0] + (buf[off + 1] << 8);
 		if ((val == 0) && (check == 1))
 			val = -1;
 	}
 	sprintf ((char *)valbuf, "%x", val);
 	ivm_set_value (name, (char *)valbuf);
 	return val;
 }

 #define INVENTORYBLOCKSIZE	0x100
 #define INVENTORYDATAADDRESS	0x21
 #define INVENTORYDATASIZE	(INVENTORYBLOCKSIZE - INVENTORYDATAADDRESS - 3)

 #define IVM_POS_SHORT_TEXT		0
 #define IVM_POS_MANU_ID			1
 #define IVM_POS_MANU_SERIAL		2
 #define IVM_POS_PART_NUMBER		3
 #define IVM_POS_BUILD_STATE		4
 #define IVM_POS_SUPPLIER_PART_NUMBER	5
 #define IVM_POS_DELIVERY_DATE		6
 #define IVM_POS_SUPPLIER_BUILD_STATE	7
 #define IVM_POS_CUSTOMER_ID		8
 #define IVM_POS_CUSTOMER_PROD_ID	9
 #define IVM_POS_HISTORY			10
 #define IVM_POS_SYMBOL_ONLY		11

 static char convert_char (char c)
 {
 	return (c < ' ' || c > '~') ? '.' : c;
 }

 static int ivm_findinventorystring (int type,
 					unsigned char* const string,
 					unsigned long maxlen,
 					unsigned char *buf)
 {
 	int xcode = 0;
 	unsigned long cr = 0;
 	unsigned long addr = INVENTORYDATAADDRESS;
 	unsigned long size = 0;
 	unsigned long nr = type;
 	int stop = 0; 	/* stop on semicolon */

 	memset(string, '\0', maxlen);
 	switch (type) {
 		case IVM_POS_SYMBOL_ONLY:
 			nr = 0;
 			stop= 1;
 		break;
 		default:
 			nr = type;
 			stop = 0;
 	}

 	/* Look for the requested number of CR. */
 	while ((cr != nr) && (addr < INVENTORYDATASIZE)) {
 		if ((buf[addr] == '\r')) {
 			cr++;
 		}
 		addr++;
 	}

 	/* the expected number of CR was found until the end of the IVM
 	 *  content --> fill string */
 	if (addr < INVENTORYDATASIZE) {
 		/* Copy the IVM string in the corresponding string */
 		for (; (buf[addr] != '\r')			&&
 			((buf[addr] != ';') ||  (!stop))	&&
 			(size < (maxlen - 1)			&&
 			(addr < INVENTORYDATASIZE)); addr++)
 		{
 			size += sprintf((char *)string + size, "%c",
 						convert_char (buf[addr]));
 		}

 		/* copy phase is done: check if everything is ok. If not,
 		 * the inventory data is most probably corrupted: tell
 		 * the world there is a problem! */
 		if (addr == INVENTORYDATASIZE) {
 			xcode = -1;
 			printf ("Error end of string not found\n");
 		} else if ((size >= (maxlen - 1)) &&
 			   (buf[addr] != '\r')) {
 			xcode = -1;
 			printf ("string too long till next CR\n");
 		}
 	} else {
 		/* some CR are missing...
 		 * the inventory data is most probably corrupted */
 		xcode = -1;
 		printf ("not enough cr found\n");
 	}
 	return xcode;
 }

 #define GET_STRING(name, which, len) \
 	if (ivm_findinventorystring (which, valbuf, len, buf) == 0) { \
 		ivm_set_value (name, (char *)valbuf); \
 	}

 static int ivm_check_crc (unsigned char *buf, int block)
 {
 	unsigned long	crc;
 	unsigned long	crceeprom;

 	crc = ivm_calc_crc (buf, CONFIG_SYS_IVM_EEPROM_PAGE_LEN - 2);
 	crceeprom = (buf[CONFIG_SYS_IVM_EEPROM_PAGE_LEN - 1] + \
 			buf[CONFIG_SYS_IVM_EEPROM_PAGE_LEN - 2] * 256);
 	if (crc != crceeprom) {
 		printf ("Error CRC Block: %d EEprom: calculated: %lx EEprom: %lx\n",
 			block, crc, crceeprom);
 		return -1;
 	}
 	return 0;
 }

 static int ivm_analyze_block2 (unsigned char *buf, int len)
 {
 	unsigned char	valbuf[CONFIG_SYS_IVM_EEPROM_PAGE_LEN];
 	unsigned long	count;

 	/* IVM_MacAddress */
 	sprintf ((char *)valbuf, "%02X:%02X:%02X:%02X:%02X:%02X",
 			buf[1],
 			buf[2],
 			buf[3],
 			buf[4],
 			buf[5],
 			buf[6]);
 	ivm_set_value ("IVM_MacAddress", (char *)valbuf);
 	if (getenv ("ethaddr") == NULL)
 		setenv ((char *)"ethaddr", (char *)valbuf);
 	/* IVM_MacCount */
 	count = (buf[10] << 24) +
 		   (buf[11] << 16) +
 		   (buf[12] << 8)  +
 		    buf[13];
 	if (count == 0xffffffff)
 		count = 1;
 	sprintf ((char *)valbuf, "%lx", count);
 	ivm_set_value ("IVM_MacCount", (char *)valbuf);
 	return 0;
 }

 int ivm_analyze_eeprom (unsigned char *buf, int len)
 {
 	unsigned short	val;
 	unsigned char	valbuf[CONFIG_SYS_IVM_EEPROM_PAGE_LEN];
 	unsigned char	*tmp;

 	if (ivm_check_crc (buf, 0) != 0)
 		return -1;

 	ivm_get_value (buf, CONFIG_SYS_IVM_EEPROM_PAGE_LEN, "IVM_BoardId", 0, 1);
 	val = ivm_get_value (buf, CONFIG_SYS_IVM_EEPROM_PAGE_LEN, "IVM_HWKey", 6, 1);
 	if (val != 0xffff) {
 		sprintf ((char *)valbuf, "%x", ((val /100) % 10));
 		ivm_set_value ("IVM_HWVariant", (char *)valbuf);
 		sprintf ((char *)valbuf, "%x", (val % 100));
 		ivm_set_value ("IVM_HWVersion", (char *)valbuf);
 	}
 	ivm_get_value (buf, CONFIG_SYS_IVM_EEPROM_PAGE_LEN, "IVM_Functions", 12, 0);

 	GET_STRING("IVM_Symbol", IVM_POS_SYMBOL_ONLY, 8)
 	GET_STRING("IVM_DeviceName", IVM_POS_SHORT_TEXT, 64)
 	tmp = (unsigned char *) getenv("IVM_DeviceName");
 	if (tmp) {
 		int	len = strlen ((char *)tmp);
 		int	i = 0;

 		while (i < len) {
 			if (tmp[i] == ';') {
 				ivm_set_value ("IVM_ShortText", (char *)&tmp[i + 1]);
 				break;
 			}
 			i++;
 		}
 		if (i >= len)
 			ivm_set_value ("IVM_ShortText", NULL);
 	} else {
 		ivm_set_value ("IVM_ShortText", NULL);
 	}
 	GET_STRING("IVM_ManufacturerID", IVM_POS_MANU_ID, 32)
 	GET_STRING("IVM_ManufacturerSerialNumber", IVM_POS_MANU_SERIAL, 20)
 	GET_STRING("IVM_ManufacturerPartNumber", IVM_POS_PART_NUMBER, 32)
 	GET_STRING("IVM_ManufacturerBuildState", IVM_POS_BUILD_STATE, 32)
 	GET_STRING("IVM_SupplierPartNumber", IVM_POS_SUPPLIER_PART_NUMBER, 32)
 	GET_STRING("IVM_DelieveryDate", IVM_POS_DELIVERY_DATE, 32)
 	GET_STRING("IVM_SupplierBuildState", IVM_POS_SUPPLIER_BUILD_STATE, 32)
 	GET_STRING("IVM_CustomerID", IVM_POS_CUSTOMER_ID, 32)
 	GET_STRING("IVM_CustomerProductID", IVM_POS_CUSTOMER_PROD_ID, 32)

 	if (ivm_check_crc (&buf[CONFIG_SYS_IVM_EEPROM_PAGE_LEN * 2], 2) != 0)
 		return -2;
 	ivm_analyze_block2 (&buf[CONFIG_SYS_IVM_EEPROM_PAGE_LEN * 2], CONFIG_SYS_IVM_EEPROM_PAGE_LEN);

 	return 0;
 }

 int ivm_read_eeprom (void)
 {
 	I2C_MUX_DEVICE *dev = NULL;
 	uchar i2c_buffer[CONFIG_SYS_IVM_EEPROM_MAX_LEN];
 	uchar	*buf;
 	unsigned dev_addr = CONFIG_SYS_IVM_EEPROM_ADR;

 	/* First init the Bus, select the Bus */
 #if defined(CONFIG_SYS_I2C_IVM_BUS)
 	dev = i2c_mux_ident_muxstring ((uchar *)CONFIG_SYS_I2C_IVM_BUS);
 #else
 	buf = (unsigned char *) getenv ("EEprom_ivm");
 	if (buf != NULL)
 		dev = i2c_mux_ident_muxstring (buf);
 #endif
 	if (dev == NULL) {
 		printf ("Error couldnt add Bus for IVM\n");
 		return -1;
 	}
 	i2c_set_bus_num (dev->busid);

 	buf = (unsigned char *) getenv ("EEprom_ivm_addr");
 	if (buf != NULL)
 		dev_addr = simple_strtoul ((char *)buf, NULL, 16);

 	if (eeprom_read (dev_addr, 0, i2c_buffer, CONFIG_SYS_IVM_EEPROM_MAX_LEN) != 0) {
 		printf ("Error reading EEprom\n");
 		return -2;
 	}

 	return ivm_analyze_eeprom (i2c_buffer, CONFIG_SYS_IVM_EEPROM_MAX_LEN);
 }

 #if defined(CONFIG_SYS_I2C_INIT_BOARD)
 #define DELAY_ABORT_SEQ		62
 #define DELAY_HALF_PERIOD	(500 / (CONFIG_SYS_I2C_SPEED / 1000))

 #if defined(CONFIG_MGCOGE)
 #define SDA_MASK	0x00010000
 #define SCL_MASK	0x00020000
 static void set_pin (int state, unsigned long mask)
 {
 	volatile ioport_t *iop = ioport_addr ((immap_t *)CONFIG_SYS_IMMR, 3);

 	if (state)
 		iop->pdat |= (mask);
 	else
 		iop->pdat &= ~(mask);

 	iop->pdir |= (mask);
 }

 static int get_pin (unsigned long mask)
 {
 	volatile ioport_t *iop = ioport_addr ((immap_t *)CONFIG_SYS_IMMR, 3);

 	iop->pdir &= ~(mask);
 	return (0 != (iop->pdat & (mask)));
 }

 static void set_sda (int state)
 {
 	set_pin (state, SDA_MASK);
 }

 static void set_scl (int state)
 {
 	set_pin (state, SCL_MASK);
 }

 static int get_sda (void)
 {
 	return get_pin (SDA_MASK);
 }

 static int get_scl (void)
 {
 	return get_pin (SCL_MASK);
 }

 #if defined(CONFIG_HARD_I2C)
 static void setports (int gpio)
 {
 	volatile ioport_t *iop = ioport_addr ((immap_t *)CONFIG_SYS_IMMR, 3);

 	if (gpio) {
 		iop->ppar &= ~(SDA_MASK | SCL_MASK);
 		iop->podr &= ~(SDA_MASK | SCL_MASK);
 	} else {
 		iop->ppar |= (SDA_MASK | SCL_MASK);
 		iop->pdir &= ~(SDA_MASK | SCL_MASK);
 		iop->podr |= (SDA_MASK | SCL_MASK);
 	}
 }
 #endif
 #endif

 #if defined(CONFIG_MGSUVD)
 static void set_sda (int state)
 {
 	I2C_SDA(state);
 }

 static void set_scl (int state)
 {
 	I2C_SCL(state);
 }

 static int get_sda (void)
 {
 	return I2C_READ;
 }

 static int get_scl (void)
 {
 	int	val;

 	*(unsigned short *)(I2C_BASE_DIR) &=  ~SCL_CONF;
 	udelay (1);
 	val = *(unsigned char *)(I2C_BASE_PORT);

 	return ((val & SCL_BIT) == SCL_BIT);
 }

 #endif

 static void writeStartSeq (void)
 {
 	set_sda (1);
 	udelay (DELAY_HALF_PERIOD);
 	set_scl (1);
 	udelay (DELAY_HALF_PERIOD);
 	set_sda (0);
 	udelay (DELAY_HALF_PERIOD);
 	set_scl (0);
 	udelay (DELAY_HALF_PERIOD);
 }

 /* I2C is a synchronous protocol and resets of the processor in the middle
    of an access can block the I2C Bus until a powerdown of the full unit is
    done. This function toggles the SCL until the SCL and SCA line are
    released, but max. 16 times, after this a I2C start-sequence is sent.
    This I2C Deblocking mechanism was developed by Keymile in association
    with Anatech and Atmel in 1998.
  */
 static int i2c_make_abort (void)
 {
 	int	scl_state = 0;
 	int	sda_state = 0;
 	int	i = 0;
 	int	ret = 0;

 	if (!get_sda ()) {
 		ret = -1;
 		while (i < 16) {
 			i++;
 			set_scl (0);
 			udelay (DELAY_ABORT_SEQ);
 			set_scl (1);
 			udelay (DELAY_ABORT_SEQ);
 			scl_state = get_scl ();
 			sda_state = get_sda ();
 			if (scl_state && sda_state) {
 				ret = 0;
 				break;
 			}
 		}
 	}
 	if (ret == 0) {
 		for (i =0; i < 5; i++) {
 			writeStartSeq ();
 		}
 	}
 	get_sda ();
 	return ret;
 }

 /**
  * i2c_init_board - reset i2c bus. When the board is powercycled during a
  * bus transfer it might hang; for details see doc/I2C_Edge_Conditions.
  */
 void i2c_init_board(void)
 {
 #if defined(CONFIG_HARD_I2C)
 	volatile immap_t *immap = (immap_t *)CONFIG_SYS_IMMR ;
 	volatile i2c8260_t *i2c	= (i2c8260_t *)&immap->im_i2c;

 	/* disable I2C controller first, otherwhise it thinks we want to    */
 	/* talk to the slave port...                                        */
 	i2c->i2c_i2mod &= ~0x01;

 	/* Set the PortPins to GPIO */
 	setports (1);
 #endif

 	/* Now run the AbortSequence() */
 	i2c_make_abort ();

 #if defined(CONFIG_HARD_I2C)
 	/* Set the PortPins back to use for I2C */
 	setports (0);
 #endif
 }
 #endif

 #if defined(CONFIG_OF_BOARD_SETUP) && defined(CONFIG_OF_LIBFDT)
 int fdt_set_node_and_value (void *blob,
 				char *nodename,
 				char *regname,
 				void *var,
 				int size)
 {
 	int ret = 0;
 	int nodeoffset = 0;

 	nodeoffset = fdt_path_offset (blob, nodename);
 	if (nodeoffset >= 0) {
 		ret = fdt_setprop (blob, nodeoffset, regname, var,
 					size);
 		if (ret < 0)
 			printf("ft_blob_update(): cannot set %s/%s "
 				"property err:%s\n", nodename, regname,
 				fdt_strerror (ret));
 	} else {
 		printf("ft_blob_update(): cannot find %s node "
 			"err:%s\n", nodename, fdt_strerror (nodeoffset));
 	}
 	return ret;
 }
 #endif
	/*
	* (C) Copyright 2008
	* Heiko Schocher, DENX Software Engineering, hs@denx.de.
	*
	* See file CREDITS for list of people who contributed to this
	* project.
	*
	* This program is free software; you can redistribute it and/or
	* modify it under the terms of the GNU General Public License as
	* published by the Free Software Foundation; either version 2 of
	* the License, or (at your option) any later version.
	*
	* This program is distributed in the hope that it will be useful,
	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	* GNU General Public License for more details.
	*
	* You should have received a copy of the GNU General Public License
	* along with this program; if not, write to the Free Software
	* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
	* MA 02111-1307 USA
	*/

	#include <common.h>
	#include <mpc8260.h>
	#include <ioports.h>
	#include <malloc.h>
	#include <hush.h>

	#if defined(CONFIG_OF_BOARD_SETUP) && defined(CONFIG_OF_LIBFDT)
	#include <libfdt.h>
	#endif

	#if defined(CONFIG_HARD_I2C) \|\| defined(CONFIG_SOFT_I2C)
	#include <i2c.h>
	#endif
	#include <asm/io.h>

	extern int i2c_soft_read_pin (void);

	int ivm_calc_crc (unsigned char *buf, int len)
	{
	const unsigned short crc_tab[16] = {
	0x0000, 0xCC01, 0xD801, 0x1400,
	0xF001, 0x3C00, 0x2800, 0xE401,
	0xA001, 0x6C00, 0x7800, 0xB401,
	0x5000, 0x9C01, 0x8801, 0x4400};

	unsigned short crc = 0; /* final result */
	unsigned short r1 = 0; /* temp */
	unsigned char byte = 0; /* input buffer */
	int i;

	/* calculate CRC from array data */
	for (i = 0; i < len; i++) {
	byte = buf[i];

	/* lower 4 bits */
	r1 = crc_tab[crc & 0xF];
	crc = ((crc) >> 4) & 0x0FFF;
	crc = crc ^ r1 ^ crc_tab[byte & 0xF];

	/* upper 4 bits */
	r1 = crc_tab[crc & 0xF];
	crc = (crc >> 4) & 0x0FFF;
	crc = crc ^ r1 ^ crc_tab[(byte >> 4) & 0xF];
	}
	return crc;
	}

	static int ivm_set_value (char name, char value)
	{
	char tempbuf[256];

	if (value != NULL) {
	sprintf (tempbuf, "%s=%s", name, value);
	return set_local_var (tempbuf, 0);
	} else {
	unset_local_var (name);
	}
	return 0;
	}

	static int ivm_get_value (unsigned char buf, int len, char name, int off,
	int check)
	{
	unsigned short val;
	unsigned char valbuf[30];

	if ((buf[off + 0] != buf[off + 2]) &&
	(buf[off + 2] != buf[off + 4])) {
	printf ("%s Error corrupted %s\n", __FUNCTION__, name);
	val = -1;
	} else {
	val = buf[off + 0] + (buf[off + 1] << 8);
	if ((val == 0) && (check == 1))
	val = -1;
	}
	sprintf ((char *)valbuf, "%x", val);
	ivm_set_value (name, (char *)valbuf);
	return val;
	}

	#define INVENTORYBLOCKSIZE 0x100
	#define INVENTORYDATAADDRESS 0x21
	#define INVENTORYDATASIZE (INVENTORYBLOCKSIZE - INVENTORYDATAADDRESS - 3)

	#define IVM_POS_SHORT_TEXT 0
	#define IVM_POS_MANU_ID 1
	#define IVM_POS_MANU_SERIAL 2
	#define IVM_POS_PART_NUMBER 3
	#define IVM_POS_BUILD_STATE 4
	#define IVM_POS_SUPPLIER_PART_NUMBER 5
	#define IVM_POS_DELIVERY_DATE 6
	#define IVM_POS_SUPPLIER_BUILD_STATE 7
	#define IVM_POS_CUSTOMER_ID 8
	#define IVM_POS_CUSTOMER_PROD_ID 9
	#define IVM_POS_HISTORY 10
	#define IVM_POS_SYMBOL_ONLY 11

	static char convert_char (char c)
	{
	return (c < ' ' \|\| c > '~') ? '.' : c;
	}

	static int ivm_findinventorystring (int type,
	unsigned char* const string,
	unsigned long maxlen,
	unsigned char *buf)
	{
	int xcode = 0;
	unsigned long cr = 0;
	unsigned long addr = INVENTORYDATAADDRESS;
	unsigned long size = 0;
	unsigned long nr = type;
	int stop = 0; /* stop on semicolon */

	memset(string, '\0', maxlen);
	switch (type) {
	case IVM_POS_SYMBOL_ONLY:
	nr = 0;
	stop= 1;
	break;
	default:
	nr = type;
	stop = 0;
	}

	/* Look for the requested number of CR. */
	while ((cr != nr) && (addr < INVENTORYDATASIZE)) {
	if ((buf[addr] == '\r')) {
	cr++;
	}
	addr++;
	}

	/* the expected number of CR was found until the end of the IVM
	* content --> fill string */
	if (addr < INVENTORYDATASIZE) {
	/* Copy the IVM string in the corresponding string */
	for (; (buf[addr] != '\r') &&
	((buf[addr] != ';') \|\| (!stop)) &&
	(size < (maxlen - 1) &&
	(addr < INVENTORYDATASIZE)); addr++)
	{
	size += sprintf((char *)string + size, "%c",
	convert_char (buf[addr]));
	}

	/* copy phase is done: check if everything is ok. If not,
	* the inventory data is most probably corrupted: tell
	* the world there is a problem! */
	if (addr == INVENTORYDATASIZE) {
	xcode = -1;
	printf ("Error end of string not found\n");
	} else if ((size >= (maxlen - 1)) &&
	(buf[addr] != '\r')) {
	xcode = -1;
	printf ("string too long till next CR\n");
	}
	} else {
	/* some CR are missing...
	* the inventory data is most probably corrupted */
	xcode = -1;
	printf ("not enough cr found\n");
	}
	return xcode;
	}

	#define GET_STRING(name, which, len) \
	if (ivm_findinventorystring (which, valbuf, len, buf) == 0) { \
	ivm_set_value (name, (char *)valbuf); \
	}

	static int ivm_check_crc (unsigned char *buf, int block)
	{
	unsigned long crc;
	unsigned long crceeprom;

	crc = ivm_calc_crc (buf, CONFIG_SYS_IVM_EEPROM_PAGE_LEN - 2);
	crceeprom = (buf[CONFIG_SYS_IVM_EEPROM_PAGE_LEN - 1] + \
	buf[CONFIG_SYS_IVM_EEPROM_PAGE_LEN - 2] * 256);
	if (crc != crceeprom) {
	printf ("Error CRC Block: %d EEprom: calculated: %lx EEprom: %lx\n",
	block, crc, crceeprom);
	return -1;
	}
	return 0;
	}

	static int ivm_analyze_block2 (unsigned char *buf, int len)
	{
	unsigned char valbuf[CONFIG_SYS_IVM_EEPROM_PAGE_LEN];
	unsigned long count;

	/* IVM_MacAddress */
	sprintf ((char *)valbuf, "%02X:%02X:%02X:%02X:%02X:%02X",
	buf[1],
	buf[2],
	buf[3],
	buf[4],
	buf[5],
	buf[6]);
	ivm_set_value ("IVM_MacAddress", (char *)valbuf);
	if (getenv ("ethaddr") == NULL)
	setenv ((char )"ethaddr", (char )valbuf);
	/* IVM_MacCount */
	count = (buf[10] << 24) +
	(buf[11] << 16) +
	(buf[12] << 8) +
	buf[13];
	if (count == 0xffffffff)
	count = 1;
	sprintf ((char *)valbuf, "%lx", count);
	ivm_set_value ("IVM_MacCount", (char *)valbuf);
	return 0;
	}

	int ivm_analyze_eeprom (unsigned char *buf, int len)
	{
	unsigned short val;
	unsigned char valbuf[CONFIG_SYS_IVM_EEPROM_PAGE_LEN];
	unsigned char *tmp;

	if (ivm_check_crc (buf, 0) != 0)
	return -1;

	ivm_get_value (buf, CONFIG_SYS_IVM_EEPROM_PAGE_LEN, "IVM_BoardId", 0, 1);
	val = ivm_get_value (buf, CONFIG_SYS_IVM_EEPROM_PAGE_LEN, "IVM_HWKey", 6, 1);
	if (val != 0xffff) {
	sprintf ((char *)valbuf, "%x", ((val /100) % 10));
	ivm_set_value ("IVM_HWVariant", (char *)valbuf);
	sprintf ((char *)valbuf, "%x", (val % 100));
	ivm_set_value ("IVM_HWVersion", (char *)valbuf);
	}
	ivm_get_value (buf, CONFIG_SYS_IVM_EEPROM_PAGE_LEN, "IVM_Functions", 12, 0);

	GET_STRING("IVM_Symbol", IVM_POS_SYMBOL_ONLY, 8)
	GET_STRING("IVM_DeviceName", IVM_POS_SHORT_TEXT, 64)
	tmp = (unsigned char *) getenv("IVM_DeviceName");
	if (tmp) {
	int len = strlen ((char *)tmp);
	int i = 0;

	while (i < len) {
	if (tmp[i] == ';') {
	ivm_set_value ("IVM_ShortText", (char *)&tmp[i + 1]);
	break;
	}
	i++;
	}
	if (i >= len)
	ivm_set_value ("IVM_ShortText", NULL);
	} else {
	ivm_set_value ("IVM_ShortText", NULL);
	}
	GET_STRING("IVM_ManufacturerID", IVM_POS_MANU_ID, 32)
	GET_STRING("IVM_ManufacturerSerialNumber", IVM_POS_MANU_SERIAL, 20)
	GET_STRING("IVM_ManufacturerPartNumber", IVM_POS_PART_NUMBER, 32)
	GET_STRING("IVM_ManufacturerBuildState", IVM_POS_BUILD_STATE, 32)
	GET_STRING("IVM_SupplierPartNumber", IVM_POS_SUPPLIER_PART_NUMBER, 32)
	GET_STRING("IVM_DelieveryDate", IVM_POS_DELIVERY_DATE, 32)
	GET_STRING("IVM_SupplierBuildState", IVM_POS_SUPPLIER_BUILD_STATE, 32)
	GET_STRING("IVM_CustomerID", IVM_POS_CUSTOMER_ID, 32)
	GET_STRING("IVM_CustomerProductID", IVM_POS_CUSTOMER_PROD_ID, 32)

	if (ivm_check_crc (&buf[CONFIG_SYS_IVM_EEPROM_PAGE_LEN * 2], 2) != 0)
	return -2;
	ivm_analyze_block2 (&buf[CONFIG_SYS_IVM_EEPROM_PAGE_LEN * 2], CONFIG_SYS_IVM_EEPROM_PAGE_LEN);

	return 0;
	}

	int ivm_read_eeprom (void)
	{
	I2C_MUX_DEVICE *dev = NULL;
	uchar i2c_buffer[CONFIG_SYS_IVM_EEPROM_MAX_LEN];
	uchar *buf;
	unsigned dev_addr = CONFIG_SYS_IVM_EEPROM_ADR;

	/* First init the Bus, select the Bus */
	#if defined(CONFIG_SYS_I2C_IVM_BUS)
	dev = i2c_mux_ident_muxstring ((uchar *)CONFIG_SYS_I2C_IVM_BUS);
	#else
	buf = (unsigned char *) getenv ("EEprom_ivm");
	if (buf != NULL)
	dev = i2c_mux_ident_muxstring (buf);
	#endif
	if (dev == NULL) {
	printf ("Error couldnt add Bus for IVM\n");
	return -1;
	}
	i2c_set_bus_num (dev->busid);

	buf = (unsigned char *) getenv ("EEprom_ivm_addr");
	if (buf != NULL)
	dev_addr = simple_strtoul ((char *)buf, NULL, 16);

	if (eeprom_read (dev_addr, 0, i2c_buffer, CONFIG_SYS_IVM_EEPROM_MAX_LEN) != 0) {
	printf ("Error reading EEprom\n");
	return -2;
	}

	return ivm_analyze_eeprom (i2c_buffer, CONFIG_SYS_IVM_EEPROM_MAX_LEN);
	}

	#if defined(CONFIG_SYS_I2C_INIT_BOARD)
	#define DELAY_ABORT_SEQ 62
	#define DELAY_HALF_PERIOD (500 / (CONFIG_SYS_I2C_SPEED / 1000))

	#if defined(CONFIG_MGCOGE)
	#define SDA_MASK 0x00010000
	#define SCL_MASK 0x00020000
	static void set_pin (int state, unsigned long mask)
	{
	volatile ioport_t iop = ioport_addr ((immap_t )CONFIG_SYS_IMMR, 3);

	if (state)
	iop->pdat \|= (mask);
	else
	iop->pdat &= ~(mask);

	iop->pdir \|= (mask);
	}

	static int get_pin (unsigned long mask)
	{
	volatile ioport_t iop = ioport_addr ((immap_t )CONFIG_SYS_IMMR, 3);

	iop->pdir &= ~(mask);
	return (0 != (iop->pdat & (mask)));
	}

	static void set_sda (int state)
	{
	set_pin (state, SDA_MASK);
	}

	static void set_scl (int state)
	{
	set_pin (state, SCL_MASK);
	}

	static int get_sda (void)
	{
	return get_pin (SDA_MASK);
	}

	static int get_scl (void)
	{
	return get_pin (SCL_MASK);
	}

	#if defined(CONFIG_HARD_I2C)
	static void setports (int gpio)
	{
	volatile ioport_t iop = ioport_addr ((immap_t )CONFIG_SYS_IMMR, 3);

	if (gpio) {
	iop->ppar &= ~(SDA_MASK \| SCL_MASK);
	iop->podr &= ~(SDA_MASK \| SCL_MASK);
	} else {
	iop->ppar \|= (SDA_MASK \| SCL_MASK);
	iop->pdir &= ~(SDA_MASK \| SCL_MASK);
	iop->podr \|= (SDA_MASK \| SCL_MASK);
	}
	}
	#endif
	#endif

	#if defined(CONFIG_MGSUVD)
	static void set_sda (int state)
	{
	I2C_SDA(state);
	}

	static void set_scl (int state)
	{
	I2C_SCL(state);
	}

	static int get_sda (void)
	{
	return I2C_READ;
	}

	static int get_scl (void)
	{
	int val;

	(unsigned short )(I2C_BASE_DIR) &= ~SCL_CONF;
	udelay (1);
	val = (unsigned char )(I2C_BASE_PORT);

	return ((val & SCL_BIT) == SCL_BIT);
	}

	#endif

	static void writeStartSeq (void)
	{
	set_sda (1);
	udelay (DELAY_HALF_PERIOD);
	set_scl (1);
	udelay (DELAY_HALF_PERIOD);
	set_sda (0);
	udelay (DELAY_HALF_PERIOD);
	set_scl (0);
	udelay (DELAY_HALF_PERIOD);
	}

	/* I2C is a synchronous protocol and resets of the processor in the middle
	of an access can block the I2C Bus until a powerdown of the full unit is
	done. This function toggles the SCL until the SCL and SCA line are
	released, but max. 16 times, after this a I2C start-sequence is sent.
	This I2C Deblocking mechanism was developed by Keymile in association
	with Anatech and Atmel in 1998.
	*/
	static int i2c_make_abort (void)
	{
	int scl_state = 0;
	int sda_state = 0;
	int i = 0;
	int ret = 0;

	if (!get_sda ()) {
	ret = -1;
	while (i < 16) {
	i++;
	set_scl (0);
	udelay (DELAY_ABORT_SEQ);
	set_scl (1);
	udelay (DELAY_ABORT_SEQ);
	scl_state = get_scl ();
	sda_state = get_sda ();
	if (scl_state && sda_state) {
	ret = 0;
	break;
	}
	}
	}
	if (ret == 0) {
	for (i =0; i < 5; i++) {
	writeStartSeq ();
	}
	}
	get_sda ();
	return ret;
	}

	/**
	* i2c_init_board - reset i2c bus. When the board is powercycled during a
	* bus transfer it might hang; for details see doc/I2C_Edge_Conditions.
	*/
	void i2c_init_board(void)
	{
	#if defined(CONFIG_HARD_I2C)
	volatile immap_t immap = (immap_t )CONFIG_SYS_IMMR ;
	volatile i2c8260_t i2c = (i2c8260_t )&immap->im_i2c;

	/* disable I2C controller first, otherwhise it thinks we want to */
	/* talk to the slave port... */
	i2c->i2c_i2mod &= ~0x01;

	/* Set the PortPins to GPIO */
	setports (1);
	#endif

	/* Now run the AbortSequence() */
	i2c_make_abort ();

	#if defined(CONFIG_HARD_I2C)
	/* Set the PortPins back to use for I2C */
	setports (0);
	#endif
	}
	#endif

	#if defined(CONFIG_OF_BOARD_SETUP) && defined(CONFIG_OF_LIBFDT)
	int fdt_set_node_and_value (void *blob,
	char *nodename,
	char *regname,
	void *var,
	int size)
	{
	int ret = 0;
	int nodeoffset = 0;

	nodeoffset = fdt_path_offset (blob, nodename);
	if (nodeoffset >= 0) {
	ret = fdt_setprop (blob, nodeoffset, regname, var,
	size);
	if (ret < 0)
	printf("ft_blob_update(): cannot set %s/%s "
	"property err:%s\n", nodename, regname,
	fdt_strerror (ret));
	} else {
	printf("ft_blob_update(): cannot find %s node "
	"err:%s\n", nodename, fdt_strerror (nodeoffset));
	}
	return ret;
	}
	#endif