mgcoge, mgsuvd: added support for the IVM EEprom.

The EEprom contains some Manufacturerinformation,
which are read from u-boot at boot time, and saved
in same hush shell variables.

Signed-off-by: Heiko Schocher <hs@denx.de>

1 files changed, 287 insertions, 0 deletions

diff --git a/board/keymile/common/common.c b/board/keymile/common/common.c
index 0f57015..18982cd 100644
--- a/board/keymile/common/common.c
+++ b/board/keymile/common/common.c
@@ -25,6 +25,7 @@
 #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>
@@ -36,6 +37,292 @@
 
 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, CFG_IVM_EEPROM_PAGE_LEN - 2);
+	crceeprom = (buf[CFG_IVM_EEPROM_PAGE_LEN - 1] + \
+			buf[CFG_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[CFG_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[CFG_IVM_EEPROM_PAGE_LEN];
+	unsigned char	*tmp;
+
+	if (ivm_check_crc (buf, 0) != 0)
+		return -1;
+
+	ivm_get_value (buf, CFG_IVM_EEPROM_PAGE_LEN, "IVM_BoardId", 0, 1);
+	val = ivm_get_value (buf, CFG_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, CFG_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[CFG_IVM_EEPROM_PAGE_LEN * 2], 2) != 0)
+		return -2;
+	ivm_analyze_block2 (&buf[CFG_IVM_EEPROM_PAGE_LEN * 2], CFG_IVM_EEPROM_PAGE_LEN);
+
+	return 0;
+}
+
+int ivm_read_eeprom (void)
+{
+	I2C_MUX_DEVICE *dev = NULL;
+	uchar i2c_buffer[CFG_IVM_EEPROM_MAX_LEN];
+	uchar	*buf;
+	unsigned dev_addr = CFG_IVM_EEPROM_ADR;
+
+	/* First init the Bus, select the Bus */
+#if defined(CFG_I2C_IVM_BUS)
+	dev = i2c_mux_ident_muxstring ((uchar *)CFG_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, CFG_IVM_EEPROM_MAX_LEN) != 0) {
+		printf ("Error reading EEprom\n");
+		return -2;
+	}
+
+	return ivm_analyze_eeprom (i2c_buffer, CFG_IVM_EEPROM_MAX_LEN);
+}
+
 #if defined(CFG_I2C_INIT_BOARD)
 #define DELAY_ABORT_SEQ		62
 #define DELAY_HALF_PERIOD	(500 / (CFG_I2C_SPEED / 1000))