km/common: move ivm functions from to ivm.c

The file common.c grows in the past. So move the IVM specific
code into an ivm.c file.

Signed-off-by: Holger Brunck <holger.brunck@keymile.com>
Signed-off-by: Valentin Longchamp <valentin.longchamp@keymile.com>
cc: Heiko Schocher <hs@denx.de>
cc: Wolfgang Denk <wd@denx.de>

1 files changed, 342 insertions, 0 deletions

diff --git a/board/keymile/common/ivm.c b/board/keymile/common/ivm.c
new file mode 100644
index 0000000..d0cb0d2
--- /dev/null
+++ b/board/keymile/common/ivm.c
@@ -0,0 +1,342 @@
+/*
+ * (C) Copyright 2011
+ * Holger Brunck, Keymile GmbH Hannover, holger.brunck@keymile.com
+ *
+ * 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 <hush.h>
+#include <i2c.h>
+#include "common.h"
+
+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", __func__, 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 INV_BLOCKSIZE		0x100
+#define INV_DATAADDRESS		0x21
+#define INVENTORYDATASIZE	(INV_BLOCKSIZE - INV_DATAADDRESS - 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 = INV_DATAADDRESS;
+	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) {
+		if (block == 0)
+			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, "%pM", buf);
+	ivm_set_value("IVM_MacAddress", (char *)valbuf);
+	/* if an offset is defined, add it */
+#if defined(CONFIG_PIGGY_MAC_ADRESS_OFFSET)
+	if (CONFIG_PIGGY_MAC_ADRESS_OFFSET > 0) {
+		unsigned long val = (buf[4] << 16) + (buf[5] << 8) + buf[6];
+
+		val += CONFIG_PIGGY_MAC_ADRESS_OFFSET;
+		buf[4] = (val >> 16) & 0xff;
+		buf[5] = (val >> 8) & 0xff;
+		buf[6] = val & 0xff;
+		sprintf((char *)valbuf, "%pM", buf);
+	}
+#endif
+	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 0;
+	ivm_analyze_block2(&buf[CONFIG_SYS_IVM_EEPROM_PAGE_LEN * 2],
+		CONFIG_SYS_IVM_EEPROM_PAGE_LEN);
+
+	return 0;
+}
+
+int ivm_read_eeprom(void)
+{
+#if defined(CONFIG_I2C_MUX)
+	I2C_MUX_DEVICE *dev = NULL;
+#endif
+	uchar i2c_buffer[CONFIG_SYS_IVM_EEPROM_MAX_LEN];
+	uchar	*buf;
+	unsigned long dev_addr = CONFIG_SYS_IVM_EEPROM_ADR;
+	int ret;
+
+#if defined(CONFIG_I2C_MUX)
+	/* 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);
+#endif
+
+	buf = (unsigned char *) getenv("EEprom_ivm_addr");
+	if (buf != NULL) {
+		ret = strict_strtoul((char *)buf, 16, &dev_addr);
+		if (ret != 0)
+			return -3;
+	}
+
+	/* add deblocking here */
+	i2c_make_abort();
+
+	ret = i2c_read(dev_addr, 0, 1, i2c_buffer,
+		CONFIG_SYS_IVM_EEPROM_MAX_LEN);
+	if (ret != 0) {
+		printf("Error reading EEprom\n");
+		return -2;
+	}
+
+	return ivm_analyze_eeprom(i2c_buffer, CONFIG_SYS_IVM_EEPROM_MAX_LEN);
+}