board/mpc8641hpcn/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 #ifdef CFG_ID_EEPROM
  31 typedef struct {
  32         unsigned char id[4];    /* 0x0000 - 0x0003 */
  33         unsigned char sn[12];   /* 0x0004 - 0x000F */
  34         unsigned char errata[5];/* 0x0010 - 0x0014 */
  35         unsigned char date[7];  /* 0x0015 - 0x001a */
  36         unsigned char res_1[37];/* 0x001b - 0x003f */
  37         unsigned char tab_size; /* 0x0040 */
  38         unsigned char tab_flag; /* 0x0041 */
  39         unsigned char mac[8][6];/* 0x0042 - 0x0071 */
  40         unsigned char res_2[126];/* 0x0072 - 0x00ef */
  41         unsigned int  crc;      /* 0x00f0 - 0x00f3 crc32 checksum */
  42 } EEPROM_data;
  43
  44 static EEPROM_data mac_data;
  45
  46 int mac_show(void)
  47 {
  48         int i;
  49         unsigned char ethaddr[8][18];
  50
  51         printf("ID %c%c%c%c\n", 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",   mac_data.errata[0],\
  56                                 mac_data.errata[1],\
  57                                 mac_data.errata[2],\
  58                                 mac_data.errata[3],\
  59                                 mac_data.errata[4]);
  60         printf("Date %c%c%c%c%c%c%c\n", mac_data.date[0],\
  61                                 mac_data.date[1],\
  62                                 mac_data.date[2],\
  63                                 mac_data.date[3],\
  64                                 mac_data.date[4],\
  65                                 mac_data.date[5],\
  66                                 mac_data.date[6]);
  67         for (i = 0; i < 8; i++) {
  68                 sprintf(ethaddr[i],"%02x:%02x:%02x:%02x:%02x:%02x",\
  69                                         mac_data.mac[i][0],\
  70                                         mac_data.mac[i][1],\
  71                                         mac_data.mac[i][2],\
  72                                         mac_data.mac[i][3],\
  73                                         mac_data.mac[i][4],\
  74                                         mac_data.mac[i][5]);
  75                 printf("MAC %d %s\n", i, ethaddr[i]);
  76         }
  77
  78         setenv("ethaddr", ethaddr[0]);
  79         setenv("eth1addr", ethaddr[1]);
  80         setenv("eth2addr", ethaddr[2]);
  81         setenv("eth3addr", ethaddr[3]);
  82
  83         return 0;
  84 }
  85
  86 int mac_read(void)
  87 {
  88         int ret,length;
  89         unsigned int crc = 0;
  90         unsigned char dev = ID_EEPROM_ADDR, *data;
  91
  92         length = sizeof(EEPROM_data);
  93         ret = i2c_read(dev, 0, 1, (unsigned char *)(&mac_data), length);
  94         if (ret) {
  95                 printf("Read failed.\n");
  96                 return -1;
  97         }
  98
  99         data = (unsigned char *)(&mac_data);
 100         printf("Check CRC on reading ...");
 101         crc = crc32(crc, data, length-4);
 102         if (crc != mac_data.crc) {
 103                 printf("CRC checksum is invalid, in EEPROM CRC is %x, calculated CRC is %x\n",mac_data.crc,crc);
 104                 return -1;
 105         }
 106         else {
 107                 printf("CRC OK\n");
 108                 mac_show();
 109         }
 110         return 0;
 111 }
 112
 113 int mac_prog(void)
 114 {
 115         int ret, i, length;
 116         unsigned int crc = 0;
 117         unsigned char dev = ID_EEPROM_ADDR,*ptr;
 118         unsigned char * eeprom_data = (unsigned char *)(&mac_data);
 119
 120         for (i = 0; i < sizeof(mac_data.res_1); i++)
 121                 mac_data.res_1[i] = 0;
 122         for (i = 0;i < sizeof(mac_data.res_2); i++)
 123                 mac_data.res_2[i] = 0;
 124         length = sizeof(EEPROM_data);
 125         crc = crc32 (crc, eeprom_data, length-4);
 126         mac_data.crc = crc;
 127         for (i = 0, ptr = eeprom_data; i < length; i += 8, ptr += 8) {
 128                 ret = i2c_write(dev, i, 1, ptr, (length-i) <8 ? (length-i) : 8);
 129                 udelay(5000);           /* 5ms write cycle timing */
 130                 if (ret)
 131                         break;
 132         }
 133         if (ret) {
 134                 printf("Programming failed.\n");
 135                 return -1;
 136         }
 137         else {
 138                 printf("Programming %d bytes. Reading back ...\n",length);
 139                 mac_read();
 140         }
 141         return 0;
 142 }
 143
 144 int do_mac (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
 145 {
 146         int i;
 147         char cmd = 's';
 148         unsigned long long mac_val;
 149
 150         if(i2c_probe(ID_EEPROM_ADDR) != 0)
 151                 return -1;
 152
 153         if(argc>1) {
 154                 cmd = argv[1][0];
 155                 switch (cmd) {
 156                         case 'r':       /* display */
 157                                 mac_read();
 158                                 break;
 159                         case 's':       /* save */
 160                                 mac_prog();
 161                                 break;
 162                         case 'i':       /* id */
 163                                 for (i=0; i<4; i++) {
 164                                         mac_data.id[i] = argv[2][i];
 165                                 }
 166                                 break;
 167                         case 'n':       /* serial number */
 168                                 for (i=0; i<12; i++) {
 169                                         mac_data.sn[i] = argv[2][i];
 170                                 }
 171                                 break;
 172                         case 'e':       /* errata */
 173                                 for (i=0; i<5; i++) {
 174                                         mac_data.errata[i] = argv[2][i];
 175                                 }
 176                                 break;
 177                         case 'd':       /* date */
 178                                 for (i=0; i<7; i++) {
 179                                         mac_data.date[i] = argv[2][i];
 180                                 }
 181                                 break;
 182                         case 'p':       /* number of ports */
 183                                 mac_data.tab_size = (unsigned char)simple_strtoul(argv[2],NULL,16);
 184                                 break;
 185                         case '0':       /* mac 0 */
 186                         case '1':       /* mac 1 */
 187                         case '2':       /* mac 2 */
 188                         case '3':       /* mac 3 */
 189                         case '4':       /* mac 4 */
 190                         case '5':       /* mac 5 */
 191                         case '6':       /* mac 6 */
 192                         case '7':       /* mac 7 */
 193                                 mac_val = simple_strtoull(argv[2],NULL,16);
 194                                 for (i=0; i<6; i++) {
 195                                         mac_data.mac[cmd-'0'][i] = *((unsigned char *)(((unsigned int)(&mac_val))+i+2));
 196                                 }
 197                                 break;
 198                         case 'h':       /* help */
 199                         default:
 200                                 printf ("Usage:\n%s\n", cmdtp->usage);
 201                                 break;
 202                 }
 203         }
 204         else {
 205                 mac_show();
 206         }
 207         return 0;
 208 }
 209
 210 int mac_read_from_eeprom(void)
 211 {
 212         int length,i;
 213         unsigned char dev = ID_EEPROM_ADDR, *data, ethaddr[4][18], enetvar[32];
 214         unsigned int crc = 0;
 215
 216         length = sizeof(EEPROM_data);
 217         if(i2c_read (dev, 0, 1, (unsigned char *)(&mac_data), length)) {
 218                 printf("Read failed.\n");
 219                 return -1;
 220         }
 221
 222         data = (unsigned char *)(&mac_data);
 223         crc = crc32(crc, data, length-4);
 224         if (crc != mac_data.crc) {
 225                 return -1;
 226         }
 227         else {
 228                 for(i=0; i<4; i++) {
 229                         if(memcmp(&mac_data.mac[i], "\0\0\0\0\0\0", 6)) {
 230                                 sprintf(ethaddr[i], "%02x:%02x:%02x:%02x:%02x:%02x", \
 231                                         mac_data.mac[i][0], \
 232                                         mac_data.mac[i][1], \
 233                                         mac_data.mac[i][2], \
 234                                         mac_data.mac[i][3], \
 235                                         mac_data.mac[i][4], \
 236                                         mac_data.mac[i][5]);
 237                                 sprintf(enetvar, i ? "eth%daddr" : "ethaddr", i);
 238                                 setenv(enetvar, ethaddr[i]);
 239                         }
 240                 }
 241         }
 242         return 0;
 243 }
 244 #endif  /* CFG_ID_EEPROM */