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Diffstat (limited to 'board/keymile/common/ivm.c')
| -rw-r--r-- | board/keymile/common/ivm.c | 342 |
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); +} |