| /* |
| * (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_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 */ |
| #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 + 1); |
| } |
| #endif |
| #ifdef MACH_TYPE_KM_KIRKWOOD |
| setenv((char *)"ethaddr", (char *)valbuf); |
| #else |
| if (getenv("ethaddr") == NULL) |
| setenv((char *)"ethaddr", (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; |
| } |
| |
| 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 |
| /* 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); |
| } |