--- /dev/null
+/*
+ * (C) Copyright 2011
+ * Holger Brunck, Keymile GmbH Hannover, holger.brunck@keymile.com
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <common.h>
+#include <hush.h>
+#include <i2c.h>
+#include "common.h"
+
+static 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 calculate_mac_offset(unsigned char *valbuf, unsigned char *buf,
+ int offset)
+{
+ unsigned long val = (buf[4] << 16) + (buf[5] << 8) + buf[6];
+
+ if (offset == 0)
+ return 0;
+
+ val += offset;
+ buf[4] = (val >> 16) & 0xff;
+ buf[5] = (val >> 8) & 0xff;
+ buf[6] = val & 0xff;
+ sprintf((char *)valbuf, "%pM", buf + 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_MAC Adress begins at offset 1 */
+ sprintf((char *)valbuf, "%pM", buf + 1);
+ ivm_set_value("IVM_MacAddress", (char *)valbuf);
+ /* if an offset is defined, add it */
+ calculate_mac_offset(buf, valbuf, CONFIG_PIGGY_MAC_ADRESS_OFFSET);
+#ifdef MACH_TYPE_KM_KIRKWOOD
+ setenv((char *)"ethaddr", (char *)valbuf);
+#else
+ if (getenv("ethaddr") == NULL)
+ setenv((char *)"ethaddr", (char *)valbuf);
+#endif
+#ifdef CONFIG_KMVECT1
+/* KMVECT1 has two ethernet interfaces */
+ if (getenv("eth1addr") == NULL) {
+ calculate_mac_offset(buf, valbuf, 1);
+ setenv((char *)"eth1addr", (char *)valbuf);
+ }
+#endif
+ /* 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;
+}
+
+static 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)
+{
+ uchar i2c_buffer[CONFIG_SYS_IVM_EEPROM_MAX_LEN];
+ int ret;
+
+ i2c_set_bus_num(CONFIG_KM_IVM_BUS);
+ /* add deblocking here */
+ i2c_make_abort();
+
+ ret = i2c_read(CONFIG_SYS_IVM_EEPROM_ADR, 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);
+}
Code Review / kvmfornfv.git / blobdiff