board/voiceblue/eeprom.c

   1 /*
   2  * (C) Copyright 2005
   3  * Ladislav Michl, 2N Telekomunikace, michl@2n.cz
   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 modify
   9  * it under the terms of the GNU General Public License version 2 as
  10  * published by the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this program; if not, write to the Free Software
  19  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  20  * MA 02111-1307 USA
  21  *
  22  * Some code shamelessly stolen back from Robin Getz.
  23  */
  24
  25 #define DEBUG
  26
  27 #include <common.h>
  28 #include <exports.h>
  29 #include "../drivers/smc91111.h"
  30
  31 #define SMC_BASE_ADDRESS CONFIG_SMC91111_BASE
  32
  33 static u16 read_eeprom_reg(u16 reg)
  34 {
  35         int timeout;
  36
  37         SMC_SELECT_BANK(2);
  38         SMC_outw(reg, PTR_REG);
  39
  40         SMC_SELECT_BANK(1);
  41         SMC_outw(SMC_inw (CTL_REG) | CTL_EEPROM_SELECT | CTL_RELOAD,
  42                  CTL_REG);
  43         timeout = 100;
  44         while((SMC_inw (CTL_REG) & CTL_RELOAD) && --timeout)
  45                 udelay(100);
  46         if (timeout == 0) {
  47                 printf("Timeout Reading EEPROM register %02x\n", reg);
  48                 return 0;
  49         }
  50
  51         return SMC_inw (GP_REG);
  52 }
  53
  54 static int write_eeprom_reg(u16 value, u16 reg)
  55 {
  56         int timeout;
  57
  58         SMC_SELECT_BANK(2);
  59         SMC_outw(reg, PTR_REG);
  60
  61         SMC_SELECT_BANK(1);
  62         SMC_outw(value, GP_REG);
  63         SMC_outw(SMC_inw (CTL_REG) | CTL_EEPROM_SELECT | CTL_STORE, CTL_REG);
  64         timeout = 100;
  65         while ((SMC_inw(CTL_REG) & CTL_STORE) && --timeout)
  66                 udelay (100);
  67         if (timeout == 0) {
  68                 printf("Timeout Writing EEPROM register %02x\n", reg);
  69                 return 0;
  70         }
  71
  72         return 1;
  73 }
  74
  75 static int write_data(u16 *buf, int len)
  76 {
  77         u16 reg = 0x23;
  78
  79         while (len--)
  80                 write_eeprom_reg(*buf++, reg++);
  81
  82         return 0;
  83 }
  84
  85 static int verify_macaddr(char *s)
  86 {
  87         u16 reg;
  88         int i, err = 0;
  89
  90         printf("MAC Address: ");
  91         err = i = 0;
  92         for (i = 0; i < 3; i++) {
  93                 reg = read_eeprom_reg(0x20 + i);
  94                 printf("%02x:%02x%c", reg & 0xff, reg >> 8, i != 2 ? ':' : '\n');
  95                 if (s)
  96                         err |= reg != ((u16 *)s)[i];
  97         }
  98
  99         return err ? 0 : 1;
 100 }
 101
 102 static int set_mac(char *s)
 103 {
 104         int i;
 105         char *e, eaddr[6];
 106
 107         /* turn string into mac value */
 108         for (i = 0; i < 6; i++) {
 109                 eaddr[i] = simple_strtoul(s, &e, 16);
 110                 s = (*e) ? e+1 : e;
 111         }
 112
 113         for (i = 0; i < 3; i++)
 114                 write_eeprom_reg(*(((u16 *)eaddr) + i), 0x20 + i);
 115
 116         return 0;
 117 }
 118
 119 static int parse_element(char *s, unsigned char *buf, int len)
 120 {
 121         int cnt;
 122         char *p, num[3];
 123         unsigned char id;
 124
 125         id = simple_strtoul(s, &p, 16);
 126         if (*p++ != ':')
 127                 return -1;
 128         cnt = 2;
 129         num[2] = 0;
 130         for (; *p; p += 2) {
 131                 if (p[1] == 0)
 132                         return -2;
 133                 if (cnt + 3 > len)
 134                         return -3;
 135                 num[0] = p[0];
 136                 num[1] = p[1];
 137                 buf[cnt++] = simple_strtoul(num, NULL, 16);
 138         }
 139         buf[0] = id;
 140         buf[1] = cnt - 2;
 141
 142         return cnt;
 143 }
 144
 145 int eeprom(int argc, char *argv[])
 146 {
 147         int i, len, ret;
 148         unsigned char buf[58], *p;
 149
 150         app_startup(argv);
 151         if (get_version() != XF_VERSION) {
 152                 printf("Wrong XF_VERSION.\n");
 153                 printf("Application expects ABI version %d\n", XF_VERSION);
 154                 printf("Actual U-Boot ABI version %d\n", (int)get_version());
 155                 return 1;
 156         }
 157
 158         if ((SMC_inw (BANK_SELECT) & 0xFF00) != 0x3300) {
 159                 printf("SMSC91111 not found.\n");
 160                 return 2;
 161         }
 162
 163         /* Called without parameters - print MAC address */
 164         if (argc < 2) {
 165                 verify_macaddr(NULL);
 166                 return 0;
 167         }
 168
 169         /* Print help message */
 170         if (argv[1][1] == 'h') {
 171                 printf("VoiceBlue EEPROM writer\n");
 172                 printf("Built: %s at %s\n", __DATE__ , __TIME__ );
 173                 printf("Usage:\n\t<mac_address> [<element_1>] [<...>]\n");
 174                 return 0;
 175         }
 176
 177         /* Try to parse information elements */
 178         len = sizeof(buf);
 179         p = buf;
 180         for (i = 2; i < argc; i++) {
 181                 ret = parse_element(argv[i], p, len);
 182                 switch (ret) {
 183                 case -1:
 184                         printf("Element %d: malformed\n", i - 1);
 185                         return 3;
 186                 case -2:
 187                         printf("Element %d: odd character count\n", i - 1);
 188                         return 3;
 189                 case -3:
 190                         printf("Out of EEPROM memory\n");
 191                         return 3;
 192                 default:
 193                         p += ret;
 194                         len -= ret;
 195                 }
 196         }
 197
 198         /* First argument (MAC) is mandatory */
 199         set_mac(argv[1]);
 200         if (verify_macaddr(argv[1])) {
 201                 printf("*** MAC address does not match! ***\n");
 202                 return 4;
 203         }
 204
 205         while (len--)
 206                 *p++ = 0;
 207
 208         write_data((u16 *)buf, sizeof(buf) >> 1);
 209
 210         return 0;
 211 }