board/keymile/common/ivm.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * (C) Copyright 2011
   4  * Holger Brunck, Keymile GmbH Hannover, holger.brunck@keymile.com
   5  */
   6
   7 #include <common.h>
   8 #include <cli_hush.h>
   9 #include <env.h>
  10 #include <i2c.h>
  11 #include "common.h"
  12
  13 #define MAC_STR_SZ      20
  14
  15 static int ivm_calc_crc(unsigned char *buf, int len)
  16 {
  17         const unsigned short crc_tab[16] = {
  18                 0x0000, 0xCC01, 0xD801, 0x1400,
  19                 0xF001, 0x3C00, 0x2800, 0xE401,
  20                 0xA001, 0x6C00, 0x7800, 0xB401,
  21                 0x5000, 0x9C01, 0x8801, 0x4400};
  22
  23         unsigned short crc     = 0;   /* final result */
  24         unsigned short r1      = 0;   /* temp */
  25         unsigned char  byte    = 0;   /* input buffer */
  26         int     i;
  27
  28         /* calculate CRC from array data */
  29         for (i = 0; i < len; i++) {
  30                 byte = buf[i];
  31
  32                 /* lower 4 bits */
  33                 r1 = crc_tab[crc & 0xF];
  34                 crc = ((crc) >> 4) & 0x0FFF;
  35                 crc = crc ^ r1 ^ crc_tab[byte & 0xF];
  36
  37                 /* upper 4 bits */
  38                 r1 = crc_tab[crc & 0xF];
  39                 crc = (crc >> 4) & 0x0FFF;
  40                 crc = crc ^ r1 ^ crc_tab[(byte >> 4) & 0xF];
  41         }
  42         return crc;
  43 }
  44
  45 static int ivm_set_value(char *name, char *value)
  46 {
  47         char tempbuf[256];
  48
  49         if (value) {
  50                 sprintf(tempbuf, "%s=%s", name, value);
  51                 return set_local_var(tempbuf, 0);
  52         }
  53         unset_local_var(name);
  54         return 0;
  55 }
  56
  57 static int ivm_get_value(unsigned char *buf, int len, char *name, int off,
  58                          int check)
  59 {
  60         unsigned short  val;
  61         unsigned char   valbuf[30];
  62
  63         if (buf[off + 0] != buf[off + 2] &&
  64             buf[off + 2] != buf[off + 4]) {
  65                 printf("%s Error corrupted %s\n", __func__, name);
  66                 val = -1;
  67         } else {
  68                 val = buf[off + 0] + (buf[off + 1] << 8);
  69                 if (val == 0 && check == 1)
  70                         val = -1;
  71         }
  72         sprintf((char *)valbuf, "%x", val);
  73         ivm_set_value(name, (char *)valbuf);
  74         return val;
  75 }
  76
  77 #define INV_BLOCKSIZE           0x100
  78 #define INV_DATAADDRESS         0x21
  79 #define INVENTORYDATASIZE       (INV_BLOCKSIZE - INV_DATAADDRESS - 3)
  80
  81 #define IVM_POS_SHORT_TEXT              0
  82 #define IVM_POS_MANU_ID                 1
  83 #define IVM_POS_MANU_SERIAL             2
  84 #define IVM_POS_PART_NUMBER             3
  85 #define IVM_POS_BUILD_STATE             4
  86 #define IVM_POS_SUPPLIER_PART_NUMBER    5
  87 #define IVM_POS_DELIVERY_DATE           6
  88 #define IVM_POS_SUPPLIER_BUILD_STATE    7
  89 #define IVM_POS_CUSTOMER_ID             8
  90 #define IVM_POS_CUSTOMER_PROD_ID        9
  91 #define IVM_POS_HISTORY                 10
  92 #define IVM_POS_SYMBOL_ONLY             11
  93
  94 static char convert_char(char c)
  95 {
  96         return (c < ' ' || c > '~') ? '.' : c;
  97 }
  98
  99 static int ivm_findinventorystring(int type,
 100                                    unsigned char *const string,
 101                                    unsigned long maxlen,
 102                                    unsigned char *buf)
 103 {
 104         int xcode = 0;
 105         unsigned long cr = 0;
 106         unsigned long addr = INV_DATAADDRESS;
 107         unsigned long size = 0;
 108         unsigned long nr = type;
 109         int stop = 0;   /* stop on semicolon */
 110
 111         memset(string, '\0', maxlen);
 112         switch (type) {
 113         case IVM_POS_SYMBOL_ONLY:
 114                 nr = 0;
 115                 stop = 1;
 116         break;
 117         default:
 118                 nr = type;
 119                 stop = 0;
 120         }
 121
 122         /* Look for the requested number of CR. */
 123         while ((cr != nr) && (addr < INVENTORYDATASIZE)) {
 124                 if (buf[addr] == '\r')
 125                         cr++;
 126                 addr++;
 127         }
 128
 129         /*
 130          * the expected number of CR was found until the end of the IVM
 131          *  content --> fill string
 132          */
 133         if (addr < INVENTORYDATASIZE) {
 134                 /* Copy the IVM string in the corresponding string */
 135                 for (; (buf[addr] != '\r')              &&
 136                      ((buf[addr] != ';') ||  (!stop))   &&
 137                      (size < (maxlen - 1)               &&
 138                      (addr < INVENTORYDATASIZE)); addr++) {
 139                         size += sprintf((char *)string + size, "%c",
 140                                         convert_char (buf[addr]));
 141                 }
 142
 143                 /*
 144                  * copy phase is done: check if everything is ok. If not,
 145                  * the inventory data is most probably corrupted: tell
 146                  * the world there is a problem!
 147                  */
 148                 if (addr == INVENTORYDATASIZE) {
 149                         xcode = -1;
 150                         printf("Error end of string not found\n");
 151                 } else if ((size > (maxlen - 1)) &&
 152                            (buf[addr] != '\r')) {
 153                         xcode = -1;
 154                         printf("string too long till next CR\n");
 155                 }
 156         } else {
 157                 /*
 158                  * some CR are missing...
 159                  * the inventory data is most probably corrupted
 160                  */
 161                 xcode = -1;
 162                 printf("not enough cr found\n");
 163         }
 164         return xcode;
 165 }
 166
 167 #define GET_STRING(name, which, len) \
 168         if (ivm_findinventorystring(which, valbuf, len, buf) == 0) { \
 169                 ivm_set_value(name, (char *)valbuf); \
 170         }
 171
 172 static int ivm_check_crc(unsigned char *buf, int block)
 173 {
 174         unsigned long   crc;
 175         unsigned long   crceeprom;
 176
 177         crc = ivm_calc_crc(buf, CONFIG_SYS_IVM_EEPROM_PAGE_LEN - 2);
 178         crceeprom = (buf[CONFIG_SYS_IVM_EEPROM_PAGE_LEN - 1] +
 179                         buf[CONFIG_SYS_IVM_EEPROM_PAGE_LEN - 2] * 256);
 180         if (crc != crceeprom) {
 181                 if (block == 0)
 182                         printf("Error CRC Block: %d EEprom: calculated: %lx EEprom: %lx\n",
 183                                block, crc, crceeprom);
 184                 return -1;
 185         }
 186         return 0;
 187 }
 188
 189 /* take care of the possible MAC address offset and the IVM content offset */
 190 static int process_mac(unsigned char *valbuf, unsigned char *buf,
 191                        int offset, bool unique)
 192 {
 193         unsigned char mac[6];
 194         unsigned long val = (buf[4] << 16) + (buf[5] << 8) + buf[6];
 195
 196         /* use an intermediate buffer, to not change IVM content
 197          * MAC address is at offset 1
 198          */
 199         memcpy(mac, buf + 1, 6);
 200
 201         /* MAC address can be set to locally administred, this is only allowed
 202          * for interfaces which have now connection to the outside. For these
 203          * addresses we need to set the second bit in the first byte.
 204          */
 205         if (!unique)
 206                 mac[0] |= 0x2;
 207
 208         if (offset) {
 209                 val += offset;
 210                 mac[3] = (val >> 16) & 0xff;
 211                 mac[4] = (val >> 8) & 0xff;
 212                 mac[5] = val & 0xff;
 213         }
 214
 215         sprintf((char *)valbuf, "%pM", mac);
 216         return 0;
 217 }
 218
 219 static int ivm_analyze_block2(unsigned char *buf, int len)
 220 {
 221         unsigned char   valbuf[MAC_STR_SZ];
 222         unsigned long   count;
 223
 224         /* IVM_MAC Address begins at offset 1 */
 225         sprintf((char *)valbuf, "%pM", buf + 1);
 226         ivm_set_value("IVM_MacAddress", (char *)valbuf);
 227         /* IVM_MacCount */
 228         count = (buf[10] << 24) +
 229                    (buf[11] << 16) +
 230                    (buf[12] << 8)  +
 231                     buf[13];
 232         if (count == 0xffffffff)
 233                 count = 1;
 234         sprintf((char *)valbuf, "%lx", count);
 235         ivm_set_value("IVM_MacCount", (char *)valbuf);
 236         return 0;
 237 }
 238
 239 int ivm_analyze_eeprom(unsigned char *buf, int len)
 240 {
 241         unsigned short  val;
 242         unsigned char   valbuf[CONFIG_SYS_IVM_EEPROM_PAGE_LEN];
 243         unsigned char   *tmp;
 244
 245         if (ivm_check_crc(buf, 0) != 0)
 246                 return -1;
 247
 248         ivm_get_value(buf, CONFIG_SYS_IVM_EEPROM_PAGE_LEN,
 249                       "IVM_BoardId", 0, 1);
 250         val = ivm_get_value(buf, CONFIG_SYS_IVM_EEPROM_PAGE_LEN,
 251                             "IVM_HWKey", 6, 1);
 252         if (val != 0xffff) {
 253                 sprintf((char *)valbuf, "%x", ((val / 100) % 10));
 254                 ivm_set_value("IVM_HWVariant", (char *)valbuf);
 255                 sprintf((char *)valbuf, "%x", (val % 100));
 256                 ivm_set_value("IVM_HWVersion", (char *)valbuf);
 257         }
 258         ivm_get_value(buf, CONFIG_SYS_IVM_EEPROM_PAGE_LEN,
 259                       "IVM_Functions", 12, 0);
 260
 261         GET_STRING("IVM_Symbol", IVM_POS_SYMBOL_ONLY, 8)
 262         GET_STRING("IVM_DeviceName", IVM_POS_SHORT_TEXT, 64)
 263         tmp = (unsigned char *)env_get("IVM_DeviceName");
 264         if (tmp) {
 265                 int     len = strlen((char *)tmp);
 266                 int     i = 0;
 267
 268                 while (i < len) {
 269                         if (tmp[i] == ';') {
 270                                 ivm_set_value("IVM_ShortText",
 271                                               (char *)&tmp[i + 1]);
 272                                 break;
 273                         }
 274                         i++;
 275                 }
 276                 if (i >= len)
 277                         ivm_set_value("IVM_ShortText", NULL);
 278         } else {
 279                 ivm_set_value("IVM_ShortText", NULL);
 280         }
 281         GET_STRING("IVM_ManufacturerID", IVM_POS_MANU_ID, 32)
 282         GET_STRING("IVM_ManufacturerSerialNumber", IVM_POS_MANU_SERIAL, 20)
 283         GET_STRING("IVM_ManufacturerPartNumber", IVM_POS_PART_NUMBER, 32)
 284         GET_STRING("IVM_ManufacturerBuildState", IVM_POS_BUILD_STATE, 32)
 285         GET_STRING("IVM_SupplierPartNumber", IVM_POS_SUPPLIER_PART_NUMBER, 32)
 286         GET_STRING("IVM_DelieveryDate", IVM_POS_DELIVERY_DATE, 32)
 287         GET_STRING("IVM_SupplierBuildState", IVM_POS_SUPPLIER_BUILD_STATE, 32)
 288         GET_STRING("IVM_CustomerID", IVM_POS_CUSTOMER_ID, 32)
 289         GET_STRING("IVM_CustomerProductID", IVM_POS_CUSTOMER_PROD_ID, 32)
 290
 291         if (ivm_check_crc(&buf[CONFIG_SYS_IVM_EEPROM_PAGE_LEN * 2], 2) != 0)
 292                 return 0;
 293         ivm_analyze_block2(&buf[CONFIG_SYS_IVM_EEPROM_PAGE_LEN * 2],
 294                            CONFIG_SYS_IVM_EEPROM_PAGE_LEN);
 295
 296         return 0;
 297 }
 298
 299 static int ivm_populate_env(unsigned char *buf, int len, int mac_address_offset)
 300 {
 301         unsigned char   *page2;
 302         unsigned char   valbuf[MAC_STR_SZ];
 303
 304         /* do we have the page 2 filled ? if not return */
 305         if (ivm_check_crc(buf, 2))
 306                 return 0;
 307         page2 = &buf[CONFIG_SYS_IVM_EEPROM_PAGE_LEN * 2];
 308
 309         if (IS_ENABLED(CONFIG_KMTEGR1)) {
 310                 /* KMTEGR1 has a special setup. eth0 has no connection to the
 311                  * outside and gets an locally administred MAC address, eth1 is
 312                  * the debug interface and gets the official MAC address from
 313                  * the IVM
 314                  */
 315                 process_mac(valbuf, page2, mac_address_offset, false);
 316                 env_set((char *)"ethaddr", (char *)valbuf);
 317                 process_mac(valbuf, page2, mac_address_offset, true);
 318                 env_set((char *)"eth1addr", (char *)valbuf);
 319         } else if (IS_ENABLED(CONFIG_ARCH_LS1021A)) {
 320                 /* LS102xA has 1xRGMII for debug connection and
 321                  * 2xSGMII for back-plane mgmt connection
 322                  */
 323                 process_mac(valbuf, page2, 1, true);
 324                 env_set((char *)"ethaddr", (char *)valbuf);
 325                 process_mac(valbuf, page2, 2, true);
 326                 env_set((char *)"eth1addr", (char *)valbuf);
 327                 process_mac(valbuf, page2, mac_address_offset, true);
 328                 env_set((char *)"eth2addr", (char *)valbuf);
 329         } else {
 330                 process_mac(valbuf, page2, mac_address_offset, true);
 331                 env_set((char *)"ethaddr", (char *)valbuf);
 332         }
 333         if (IS_ENABLED(CONFIG_TARGET_KMCENT2)) {
 334                 /* 3rd ethernet interface */
 335                 process_mac(valbuf, page2, 2, true);
 336                 env_set((char *)"eth4addr", (char *)valbuf);
 337         }
 338
 339         return 0;
 340 }
 341
 342 int ivm_read_eeprom(unsigned char *buf, int len, int mac_address_offset)
 343 {
 344         int ret;
 345 #if CONFIG_IS_ENABLED(DM_I2C)
 346         struct udevice *eedev = NULL;
 347
 348         ret = i2c_get_chip_for_busnum(CONFIG_KM_IVM_BUS,
 349                                       CONFIG_SYS_I2C_EEPROM_ADDR, 1, &eedev);
 350         if (ret) {
 351                 printf("failed to get device for EEPROM at address 0x%02x\n",
 352                        CONFIG_SYS_I2C_EEPROM_ADDR);
 353                 return 1;
 354         }
 355
 356         ret = dm_i2c_read(eedev, 0, buf, len);
 357         if (ret != 0) {
 358                 printf("Error: Unable to read from I2C EEPROM at address %02X:%02X\n",
 359                        CONFIG_SYS_I2C_EEPROM_ADDR, 0);
 360                 return 1;
 361         }
 362 #else
 363         i2c_set_bus_num(CONFIG_KM_IVM_BUS);
 364         /* add deblocking here */
 365         i2c_make_abort();
 366
 367         ret = i2c_read(CONFIG_SYS_IVM_EEPROM_ADR, 0, 1, buf, len);
 368         if (ret != 0) {
 369                 printf("Error reading EEprom\n");
 370                 return -2;
 371         }
 372 #endif
 373         return ivm_populate_env(buf, len, mac_address_offset);
 374 }