board/freescale/common/sys_eeprom.c

   1 /*
   2  * Copyright 2006 Freescale Semiconductor
   3  * York Sun (yorksun@freescale.com)
   4  * Haiying Wang (haiying.wang@freescale.com)
   5  *
   6  * See file CREDITS for list of people who contributed to this
   7  * project.
   8  *
   9  * This program is free software; you can redistribute it and/or
  10  * modify it under the terms of the GNU General Public License as
  11  * published by the Free Software Foundation; either version 2 of
  12  * the License, or (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program; if not, write to the Free Software
  21  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  22  * MA 02111-1307 USA
  23  */
  24
  25 #include <common.h>
  26 #include <command.h>
  27 #include <i2c.h>
  28 #include <linux/ctype.h>
  29
  30 typedef struct {
  31         unsigned char id[4];            /* 0x0000 - 0x0003 */
  32         unsigned char sn[12];           /* 0x0004 - 0x000F */
  33         unsigned char errata[5];        /* 0x0010 - 0x0014 */
  34         unsigned char date[7];          /* 0x0015 - 0x001a */
  35         unsigned char res_1[37];        /* 0x001b - 0x003f */
  36         unsigned char tab_size;         /* 0x0040 */
  37         unsigned char tab_flag;         /* 0x0041 */
  38         unsigned char mac[8][6];        /* 0x0042 - 0x0071 */
  39         unsigned char res_2[126];       /* 0x0072 - 0x00ef */
  40         unsigned int crc;               /* 0x00f0 - 0x00f3 crc32 checksum */
  41 } EEPROM_data;
  42
  43 static EEPROM_data mac_data;
  44
  45 int mac_show(void)
  46 {
  47         int i;
  48         unsigned char ethaddr[8][18];
  49
  50         printf("ID %c%c%c%c\n",
  51                mac_data.id[0],
  52                mac_data.id[1],
  53                mac_data.id[2],
  54                mac_data.id[3]);
  55         printf("Errata %c%c%c%c%c\n",
  56                mac_data.errata[0],
  57                mac_data.errata[1],
  58                mac_data.errata[2],
  59                mac_data.errata[3],
  60                mac_data.errata[4]);
  61         printf("Date %c%c%c%c%c%c%c\n",
  62                mac_data.date[0],
  63                mac_data.date[1],
  64                mac_data.date[2],
  65                mac_data.date[3],
  66                mac_data.date[4],
  67                mac_data.date[5],
  68                mac_data.date[6]);
  69         for (i = 0; i < 8; i++) {
  70                 sprintf((char *)ethaddr[i],
  71                         "%02x:%02x:%02x:%02x:%02x:%02x",
  72                         mac_data.mac[i][0],
  73                         mac_data.mac[i][1],
  74                         mac_data.mac[i][2],
  75                         mac_data.mac[i][3],
  76                         mac_data.mac[i][4],
  77                         mac_data.mac[i][5]);
  78                 printf("MAC %d %s\n", i, ethaddr[i]);
  79         }
  80
  81         setenv("ethaddr",  (char *)ethaddr[0]);
  82         setenv("eth1addr", (char *)ethaddr[1]);
  83         setenv("eth2addr", (char *)ethaddr[2]);
  84         setenv("eth3addr", (char *)ethaddr[3]);
  85
  86         return 0;
  87 }
  88
  89 int mac_read(void)
  90 {
  91         int ret, length;
  92         unsigned int crc = 0;
  93         unsigned char dev = ID_EEPROM_ADDR, *data;
  94
  95         length = sizeof(EEPROM_data);
  96         ret = i2c_read(dev, 0, 1, (unsigned char *)(&mac_data), length);
  97         if (ret) {
  98                 printf("Read failed.\n");
  99                 return -1;
 100         }
 101
 102         data = (unsigned char *)(&mac_data);
 103         printf("Check CRC on reading ...");
 104         crc = crc32(crc, data, length - 4);
 105         if (crc != mac_data.crc) {
 106                 printf("CRC checksum is invalid, in EEPROM CRC is %x, calculated CRC is %x\n",
 107                      mac_data.crc, crc);
 108                 return -1;
 109         } else {
 110                 printf("CRC OK\n");
 111                 mac_show();
 112         }
 113         return 0;
 114 }
 115
 116 int mac_prog(void)
 117 {
 118         int ret, i, length;
 119         unsigned int crc = 0;
 120         unsigned char dev = ID_EEPROM_ADDR, *ptr;
 121         unsigned char *eeprom_data = (unsigned char *)(&mac_data);
 122
 123         for (i = 0; i < sizeof(mac_data.res_1); i++)
 124                 mac_data.res_1[i] = 0;
 125         for (i = 0; i < sizeof(mac_data.res_2); i++)
 126                 mac_data.res_2[i] = 0;
 127         length = sizeof(EEPROM_data);
 128         crc = crc32(crc, eeprom_data, length - 4);
 129         mac_data.crc = crc;
 130         for (i = 0, ptr = eeprom_data; i < length; i += 8, ptr += 8) {
 131                 ret =
 132                     i2c_write(dev, i, 1, ptr,
 133                               (length - i) < 8 ? (length - i) : 8);
 134                 udelay(5000);   /* 5ms write cycle timing */
 135                 if (ret)
 136                         break;
 137         }
 138         if (ret) {
 139                 printf("Programming failed.\n");
 140                 return -1;
 141         } else {
 142                 printf("Programming %d bytes. Reading back ...\n", length);
 143                 mac_read();
 144         }
 145         return 0;
 146 }
 147
 148 int do_mac(cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
 149 {
 150         int i;
 151         char cmd = 's';
 152         unsigned long long mac_val;
 153
 154         if (i2c_probe(ID_EEPROM_ADDR) != 0)
 155                 return -1;
 156
 157         if (argc > 1) {
 158                 cmd = argv[1][0];
 159                 switch (cmd) {
 160                 case 'r':       /* display */
 161                         mac_read();
 162                         break;
 163                 case 's':       /* save */
 164                         mac_prog();
 165                         break;
 166                 case 'i':       /* id */
 167                         for (i = 0; i < 4; i++) {
 168                                 mac_data.id[i] = argv[2][i];
 169                         }
 170                         break;
 171                 case 'n':       /* serial number */
 172                         for (i = 0; i < 12; i++) {
 173                                 mac_data.sn[i] = argv[2][i];
 174                         }
 175                         break;
 176                 case 'e':       /* errata */
 177                         for (i = 0; i < 5; i++) {
 178                                 mac_data.errata[i] = argv[2][i];
 179                         }
 180                         break;
 181                 case 'd':       /* date */
 182                         for (i = 0; i < 7; i++) {
 183                                 mac_data.date[i] = argv[2][i];
 184                         }
 185                         break;
 186                 case 'p':       /* number of ports */
 187                         mac_data.tab_size =
 188                             (unsigned char)simple_strtoul(argv[2], NULL, 16);
 189                         break;
 190                 case '0':       /* mac 0 */
 191                 case '1':       /* mac 1 */
 192                 case '2':       /* mac 2 */
 193                 case '3':       /* mac 3 */
 194                 case '4':       /* mac 4 */
 195                 case '5':       /* mac 5 */
 196                 case '6':       /* mac 6 */
 197                 case '7':       /* mac 7 */
 198                         mac_val = simple_strtoull(argv[2], NULL, 16);
 199                         for (i = 0; i < 6; i++) {
 200                                 mac_data.mac[cmd - '0'][i] =
 201                                     *((unsigned char *)
 202                                       (((unsigned int)(&mac_val)) + i + 2));
 203                         }
 204                         break;
 205                 case 'h':       /* help */
 206                 default:
 207                         printf("Usage:\n%s\n", cmdtp->usage);
 208                         break;
 209                 }
 210         } else {
 211                 mac_show();
 212         }
 213         return 0;
 214 }
 215
 216 int mac_read_from_eeprom(void)
 217 {
 218         int length, i;
 219         unsigned char dev = ID_EEPROM_ADDR;
 220         unsigned char *data;
 221         unsigned char ethaddr[4][18];
 222         unsigned char enetvar[32];
 223         unsigned int crc = 0;
 224
 225         length = sizeof(EEPROM_data);
 226         if (i2c_read(dev, 0, 1, (unsigned char *)(&mac_data), length)) {
 227                 printf("Read failed.\n");
 228                 return -1;
 229         }
 230
 231         data = (unsigned char *)(&mac_data);
 232         crc = crc32(crc, data, length - 4);
 233         if (crc != mac_data.crc) {
 234                 return -1;
 235         } else {
 236                 for (i = 0; i < 4; i++) {
 237                         if (memcmp(&mac_data.mac[i], "\0\0\0\0\0\0", 6)) {
 238                                 sprintf((char *)ethaddr[i],
 239                                         "%02x:%02x:%02x:%02x:%02x:%02x",
 240                                         mac_data.mac[i][0],
 241                                         mac_data.mac[i][1],
 242                                         mac_data.mac[i][2],
 243                                         mac_data.mac[i][3],
 244                                         mac_data.mac[i][4],
 245                                         mac_data.mac[i][5]);
 246                                 sprintf((char *)enetvar,
 247                                         i ? "eth%daddr" : "ethaddr",
 248                                         i);
 249                                 setenv((char *)enetvar, (char *)ethaddr[i]);
 250                         }
 251                 }
 252         }
 253         return 0;
 254 }