Holger Brunck | bf20a88 | 2011-06-05 22:22:18 +0000 | [diff] [blame] | 1 | /* |
| 2 | * (C) Copyright 2011 |
| 3 | * Holger Brunck, Keymile GmbH Hannover, holger.brunck@keymile.com |
| 4 | * |
| 5 | * See file CREDITS for list of people who contributed to this |
| 6 | * project. |
| 7 | * |
| 8 | * This program is free software; you can redistribute it and/or |
| 9 | * modify it under the terms of the GNU General Public License as |
| 10 | * published by the Free Software Foundation; either version 2 of |
| 11 | * the License, or (at your option) any later version. |
| 12 | * |
| 13 | * This program is distributed in the hope that it will be useful, |
| 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 16 | * GNU General Public License for more details. |
| 17 | * |
| 18 | * You should have received a copy of the GNU General Public License |
| 19 | * along with this program; if not, write to the Free Software |
| 20 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, |
| 21 | * MA 02111-1307 USA |
| 22 | */ |
| 23 | |
| 24 | #include <common.h> |
| 25 | #include <hush.h> |
| 26 | #include <i2c.h> |
| 27 | #include "common.h" |
| 28 | |
| 29 | int ivm_calc_crc(unsigned char *buf, int len) |
| 30 | { |
| 31 | const unsigned short crc_tab[16] = { |
| 32 | 0x0000, 0xCC01, 0xD801, 0x1400, |
| 33 | 0xF001, 0x3C00, 0x2800, 0xE401, |
| 34 | 0xA001, 0x6C00, 0x7800, 0xB401, |
| 35 | 0x5000, 0x9C01, 0x8801, 0x4400}; |
| 36 | |
| 37 | unsigned short crc = 0; /* final result */ |
| 38 | unsigned short r1 = 0; /* temp */ |
| 39 | unsigned char byte = 0; /* input buffer */ |
| 40 | int i; |
| 41 | |
| 42 | /* calculate CRC from array data */ |
| 43 | for (i = 0; i < len; i++) { |
| 44 | byte = buf[i]; |
| 45 | |
| 46 | /* lower 4 bits */ |
| 47 | r1 = crc_tab[crc & 0xF]; |
| 48 | crc = ((crc) >> 4) & 0x0FFF; |
| 49 | crc = crc ^ r1 ^ crc_tab[byte & 0xF]; |
| 50 | |
| 51 | /* upper 4 bits */ |
| 52 | r1 = crc_tab[crc & 0xF]; |
| 53 | crc = (crc >> 4) & 0x0FFF; |
| 54 | crc = crc ^ r1 ^ crc_tab[(byte >> 4) & 0xF]; |
| 55 | } |
| 56 | return crc; |
| 57 | } |
| 58 | |
| 59 | static int ivm_set_value(char *name, char *value) |
| 60 | { |
| 61 | char tempbuf[256]; |
| 62 | |
| 63 | if (value != NULL) { |
| 64 | sprintf(tempbuf, "%s=%s", name, value); |
| 65 | return set_local_var(tempbuf, 0); |
| 66 | } else { |
| 67 | unset_local_var(name); |
| 68 | } |
| 69 | return 0; |
| 70 | } |
| 71 | |
| 72 | static int ivm_get_value(unsigned char *buf, int len, char *name, int off, |
| 73 | int check) |
| 74 | { |
| 75 | unsigned short val; |
| 76 | unsigned char valbuf[30]; |
| 77 | |
| 78 | if ((buf[off + 0] != buf[off + 2]) && |
| 79 | (buf[off + 2] != buf[off + 4])) { |
| 80 | printf("%s Error corrupted %s\n", __func__, name); |
| 81 | val = -1; |
| 82 | } else { |
| 83 | val = buf[off + 0] + (buf[off + 1] << 8); |
| 84 | if ((val == 0) && (check == 1)) |
| 85 | val = -1; |
| 86 | } |
| 87 | sprintf((char *)valbuf, "%x", val); |
| 88 | ivm_set_value(name, (char *)valbuf); |
| 89 | return val; |
| 90 | } |
| 91 | |
| 92 | #define INV_BLOCKSIZE 0x100 |
| 93 | #define INV_DATAADDRESS 0x21 |
| 94 | #define INVENTORYDATASIZE (INV_BLOCKSIZE - INV_DATAADDRESS - 3) |
| 95 | |
| 96 | #define IVM_POS_SHORT_TEXT 0 |
| 97 | #define IVM_POS_MANU_ID 1 |
| 98 | #define IVM_POS_MANU_SERIAL 2 |
| 99 | #define IVM_POS_PART_NUMBER 3 |
| 100 | #define IVM_POS_BUILD_STATE 4 |
| 101 | #define IVM_POS_SUPPLIER_PART_NUMBER 5 |
| 102 | #define IVM_POS_DELIVERY_DATE 6 |
| 103 | #define IVM_POS_SUPPLIER_BUILD_STATE 7 |
| 104 | #define IVM_POS_CUSTOMER_ID 8 |
| 105 | #define IVM_POS_CUSTOMER_PROD_ID 9 |
| 106 | #define IVM_POS_HISTORY 10 |
| 107 | #define IVM_POS_SYMBOL_ONLY 11 |
| 108 | |
| 109 | static char convert_char(char c) |
| 110 | { |
| 111 | return (c < ' ' || c > '~') ? '.' : c; |
| 112 | } |
| 113 | |
| 114 | static int ivm_findinventorystring(int type, |
| 115 | unsigned char *const string, |
| 116 | unsigned long maxlen, |
| 117 | unsigned char *buf) |
| 118 | { |
| 119 | int xcode = 0; |
| 120 | unsigned long cr = 0; |
| 121 | unsigned long addr = INV_DATAADDRESS; |
| 122 | unsigned long size = 0; |
| 123 | unsigned long nr = type; |
| 124 | int stop = 0; /* stop on semicolon */ |
| 125 | |
| 126 | memset(string, '\0', maxlen); |
| 127 | switch (type) { |
| 128 | case IVM_POS_SYMBOL_ONLY: |
| 129 | nr = 0; |
| 130 | stop = 1; |
| 131 | break; |
| 132 | default: |
| 133 | nr = type; |
| 134 | stop = 0; |
| 135 | } |
| 136 | |
| 137 | /* Look for the requested number of CR. */ |
| 138 | while ((cr != nr) && (addr < INVENTORYDATASIZE)) { |
| 139 | if ((buf[addr] == '\r')) |
| 140 | cr++; |
| 141 | addr++; |
| 142 | } |
| 143 | |
| 144 | /* |
| 145 | * the expected number of CR was found until the end of the IVM |
| 146 | * content --> fill string |
| 147 | */ |
| 148 | if (addr < INVENTORYDATASIZE) { |
| 149 | /* Copy the IVM string in the corresponding string */ |
| 150 | for (; (buf[addr] != '\r') && |
| 151 | ((buf[addr] != ';') || (!stop)) && |
| 152 | (size < (maxlen - 1) && |
| 153 | (addr < INVENTORYDATASIZE)); addr++) { |
| 154 | size += sprintf((char *)string + size, "%c", |
| 155 | convert_char (buf[addr])); |
| 156 | } |
| 157 | |
| 158 | /* |
| 159 | * copy phase is done: check if everything is ok. If not, |
| 160 | * the inventory data is most probably corrupted: tell |
| 161 | * the world there is a problem! |
| 162 | */ |
| 163 | if (addr == INVENTORYDATASIZE) { |
| 164 | xcode = -1; |
| 165 | printf("Error end of string not found\n"); |
| 166 | } else if ((size >= (maxlen - 1)) && |
| 167 | (buf[addr] != '\r')) { |
| 168 | xcode = -1; |
| 169 | printf("string too long till next CR\n"); |
| 170 | } |
| 171 | } else { |
| 172 | /* |
| 173 | * some CR are missing... |
| 174 | * the inventory data is most probably corrupted |
| 175 | */ |
| 176 | xcode = -1; |
| 177 | printf("not enough cr found\n"); |
| 178 | } |
| 179 | return xcode; |
| 180 | } |
| 181 | |
| 182 | #define GET_STRING(name, which, len) \ |
| 183 | if (ivm_findinventorystring(which, valbuf, len, buf) == 0) { \ |
| 184 | ivm_set_value(name, (char *)valbuf); \ |
| 185 | } |
| 186 | |
| 187 | static int ivm_check_crc(unsigned char *buf, int block) |
| 188 | { |
| 189 | unsigned long crc; |
| 190 | unsigned long crceeprom; |
| 191 | |
| 192 | crc = ivm_calc_crc(buf, CONFIG_SYS_IVM_EEPROM_PAGE_LEN - 2); |
| 193 | crceeprom = (buf[CONFIG_SYS_IVM_EEPROM_PAGE_LEN - 1] + \ |
| 194 | buf[CONFIG_SYS_IVM_EEPROM_PAGE_LEN - 2] * 256); |
| 195 | if (crc != crceeprom) { |
| 196 | if (block == 0) |
| 197 | printf("Error CRC Block: %d EEprom: calculated: \ |
| 198 | %lx EEprom: %lx\n", block, crc, crceeprom); |
| 199 | return -1; |
| 200 | } |
| 201 | return 0; |
| 202 | } |
| 203 | |
| 204 | static int ivm_analyze_block2(unsigned char *buf, int len) |
| 205 | { |
| 206 | unsigned char valbuf[CONFIG_SYS_IVM_EEPROM_PAGE_LEN]; |
| 207 | unsigned long count; |
| 208 | |
Holger Brunck | 2022962 | 2011-09-20 05:05:55 +0000 | [diff] [blame] | 209 | /* IVM_MAC Adress begins at offset 1 */ |
| 210 | sprintf((char *)valbuf, "%pM", buf + 1); |
Holger Brunck | bf20a88 | 2011-06-05 22:22:18 +0000 | [diff] [blame] | 211 | ivm_set_value("IVM_MacAddress", (char *)valbuf); |
| 212 | /* if an offset is defined, add it */ |
| 213 | #if defined(CONFIG_PIGGY_MAC_ADRESS_OFFSET) |
| 214 | if (CONFIG_PIGGY_MAC_ADRESS_OFFSET > 0) { |
| 215 | unsigned long val = (buf[4] << 16) + (buf[5] << 8) + buf[6]; |
| 216 | |
| 217 | val += CONFIG_PIGGY_MAC_ADRESS_OFFSET; |
| 218 | buf[4] = (val >> 16) & 0xff; |
| 219 | buf[5] = (val >> 8) & 0xff; |
| 220 | buf[6] = val & 0xff; |
Thomas Herzmann | 5872812 | 2012-05-04 10:55:53 +0200 | [diff] [blame] | 221 | sprintf((char *)valbuf, "%pM", buf + 1); |
Holger Brunck | bf20a88 | 2011-06-05 22:22:18 +0000 | [diff] [blame] | 222 | } |
| 223 | #endif |
Holger Brunck | b9d9124 | 2011-09-13 23:06:10 +0000 | [diff] [blame] | 224 | #ifdef MACH_TYPE_KM_KIRKWOOD |
Holger Brunck | bf20a88 | 2011-06-05 22:22:18 +0000 | [diff] [blame] | 225 | setenv((char *)"ethaddr", (char *)valbuf); |
Holger Brunck | b9d9124 | 2011-09-13 23:06:10 +0000 | [diff] [blame] | 226 | #else |
| 227 | if (getenv("ethaddr") == NULL) |
| 228 | setenv((char *)"ethaddr", (char *)valbuf); |
| 229 | #endif |
Holger Brunck | bf20a88 | 2011-06-05 22:22:18 +0000 | [diff] [blame] | 230 | |
| 231 | /* IVM_MacCount */ |
| 232 | count = (buf[10] << 24) + |
| 233 | (buf[11] << 16) + |
| 234 | (buf[12] << 8) + |
| 235 | buf[13]; |
| 236 | if (count == 0xffffffff) |
| 237 | count = 1; |
| 238 | sprintf((char *)valbuf, "%lx", count); |
| 239 | ivm_set_value("IVM_MacCount", (char *)valbuf); |
| 240 | return 0; |
| 241 | } |
| 242 | |
| 243 | int ivm_analyze_eeprom(unsigned char *buf, int len) |
| 244 | { |
| 245 | unsigned short val; |
| 246 | unsigned char valbuf[CONFIG_SYS_IVM_EEPROM_PAGE_LEN]; |
| 247 | unsigned char *tmp; |
| 248 | |
| 249 | if (ivm_check_crc(buf, 0) != 0) |
| 250 | return -1; |
| 251 | |
| 252 | ivm_get_value(buf, CONFIG_SYS_IVM_EEPROM_PAGE_LEN, |
| 253 | "IVM_BoardId", 0, 1); |
| 254 | val = ivm_get_value(buf, CONFIG_SYS_IVM_EEPROM_PAGE_LEN, |
| 255 | "IVM_HWKey", 6, 1); |
| 256 | if (val != 0xffff) { |
| 257 | sprintf((char *)valbuf, "%x", ((val / 100) % 10)); |
| 258 | ivm_set_value("IVM_HWVariant", (char *)valbuf); |
| 259 | sprintf((char *)valbuf, "%x", (val % 100)); |
| 260 | ivm_set_value("IVM_HWVersion", (char *)valbuf); |
| 261 | } |
| 262 | ivm_get_value(buf, CONFIG_SYS_IVM_EEPROM_PAGE_LEN, |
| 263 | "IVM_Functions", 12, 0); |
| 264 | |
| 265 | GET_STRING("IVM_Symbol", IVM_POS_SYMBOL_ONLY, 8) |
| 266 | GET_STRING("IVM_DeviceName", IVM_POS_SHORT_TEXT, 64) |
| 267 | tmp = (unsigned char *) getenv("IVM_DeviceName"); |
| 268 | if (tmp) { |
| 269 | int len = strlen((char *)tmp); |
| 270 | int i = 0; |
| 271 | |
| 272 | while (i < len) { |
| 273 | if (tmp[i] == ';') { |
| 274 | ivm_set_value("IVM_ShortText", |
| 275 | (char *)&tmp[i + 1]); |
| 276 | break; |
| 277 | } |
| 278 | i++; |
| 279 | } |
| 280 | if (i >= len) |
| 281 | ivm_set_value("IVM_ShortText", NULL); |
| 282 | } else { |
| 283 | ivm_set_value("IVM_ShortText", NULL); |
| 284 | } |
| 285 | GET_STRING("IVM_ManufacturerID", IVM_POS_MANU_ID, 32) |
| 286 | GET_STRING("IVM_ManufacturerSerialNumber", IVM_POS_MANU_SERIAL, 20) |
| 287 | GET_STRING("IVM_ManufacturerPartNumber", IVM_POS_PART_NUMBER, 32) |
| 288 | GET_STRING("IVM_ManufacturerBuildState", IVM_POS_BUILD_STATE, 32) |
| 289 | GET_STRING("IVM_SupplierPartNumber", IVM_POS_SUPPLIER_PART_NUMBER, 32) |
| 290 | GET_STRING("IVM_DelieveryDate", IVM_POS_DELIVERY_DATE, 32) |
| 291 | GET_STRING("IVM_SupplierBuildState", IVM_POS_SUPPLIER_BUILD_STATE, 32) |
| 292 | GET_STRING("IVM_CustomerID", IVM_POS_CUSTOMER_ID, 32) |
| 293 | GET_STRING("IVM_CustomerProductID", IVM_POS_CUSTOMER_PROD_ID, 32) |
| 294 | |
| 295 | if (ivm_check_crc(&buf[CONFIG_SYS_IVM_EEPROM_PAGE_LEN * 2], 2) != 0) |
| 296 | return 0; |
| 297 | ivm_analyze_block2(&buf[CONFIG_SYS_IVM_EEPROM_PAGE_LEN * 2], |
| 298 | CONFIG_SYS_IVM_EEPROM_PAGE_LEN); |
| 299 | |
| 300 | return 0; |
| 301 | } |
| 302 | |
| 303 | int ivm_read_eeprom(void) |
| 304 | { |
| 305 | #if defined(CONFIG_I2C_MUX) |
| 306 | I2C_MUX_DEVICE *dev = NULL; |
| 307 | #endif |
| 308 | uchar i2c_buffer[CONFIG_SYS_IVM_EEPROM_MAX_LEN]; |
| 309 | uchar *buf; |
| 310 | unsigned long dev_addr = CONFIG_SYS_IVM_EEPROM_ADR; |
| 311 | int ret; |
| 312 | |
| 313 | #if defined(CONFIG_I2C_MUX) |
| 314 | /* First init the Bus, select the Bus */ |
| 315 | #if defined(CONFIG_SYS_I2C_IVM_BUS) |
| 316 | dev = i2c_mux_ident_muxstring((uchar *)CONFIG_SYS_I2C_IVM_BUS); |
| 317 | #else |
| 318 | buf = (unsigned char *) getenv("EEprom_ivm"); |
| 319 | if (buf != NULL) |
| 320 | dev = i2c_mux_ident_muxstring(buf); |
| 321 | #endif |
| 322 | if (dev == NULL) { |
| 323 | printf("Error couldnt add Bus for IVM\n"); |
| 324 | return -1; |
| 325 | } |
| 326 | i2c_set_bus_num(dev->busid); |
| 327 | #endif |
| 328 | |
| 329 | buf = (unsigned char *) getenv("EEprom_ivm_addr"); |
| 330 | if (buf != NULL) { |
| 331 | ret = strict_strtoul((char *)buf, 16, &dev_addr); |
| 332 | if (ret != 0) |
| 333 | return -3; |
| 334 | } |
| 335 | |
| 336 | /* add deblocking here */ |
| 337 | i2c_make_abort(); |
| 338 | |
| 339 | ret = i2c_read(dev_addr, 0, 1, i2c_buffer, |
| 340 | CONFIG_SYS_IVM_EEPROM_MAX_LEN); |
| 341 | if (ret != 0) { |
| 342 | printf("Error reading EEprom\n"); |
| 343 | return -2; |
| 344 | } |
| 345 | |
| 346 | return ivm_analyze_eeprom(i2c_buffer, CONFIG_SYS_IVM_EEPROM_MAX_LEN); |
| 347 | } |