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 <timestamp.h>
  30 #include <net.h>
  31 #include "../drivers/net/smc91111.h"
  32
  33 static u16 read_eeprom_reg(struct eth_device *dev, u16 reg)
  34 {
  35         int timeout;
  36
  37         SMC_SELECT_BANK(dev, 2);
  38         SMC_outw(dev, reg, PTR_REG);
  39
  40         SMC_SELECT_BANK(dev, 1);
  41         SMC_outw(dev, SMC_inw (dev, CTL_REG) | CTL_EEPROM_SELECT | CTL_RELOAD,
  42                  CTL_REG);
  43         timeout = 100;
  44         while((SMC_inw (dev, 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 (dev, GP_REG);
  52 }
  53
  54 static int write_eeprom_reg(struct eth_device *dev, u16 value, u16 reg)
  55 {
  56         int timeout;
  57
  58         SMC_SELECT_BANK(dev, 2);
  59         SMC_outw(dev, reg, PTR_REG);
  60
  61         SMC_SELECT_BANK(dev, 1);
  62         SMC_outw(dev, value, GP_REG);
  63         SMC_outw(dev, SMC_inw (dev, CTL_REG) | CTL_EEPROM_SELECT | CTL_STORE, CTL_REG);
  64         timeout = 100;
  65         while ((SMC_inw(dev, 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(struct eth_device *dev, u16 *buf, int len)
  76 {
  77         u16 reg = 0x23;
  78
  79         while (len--)
  80                 write_eeprom_reg(dev, *buf++, reg++);
  81
  82         return 0;
  83 }
  84
  85 static int verify_macaddr(struct eth_device *dev, 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(dev, 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(struct eth_device *dev, 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(dev, *(((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         struct eth_device dev = {
 151                 .iobase = CONFIG_SMC91111_BASE
 152         };
 153
 154         app_startup(argv);
 155         if (get_version() != XF_VERSION) {
 156                 printf("Wrong XF_VERSION.\n");
 157                 printf("Application expects ABI version %d\n", XF_VERSION);
 158                 printf("Actual U-Boot ABI version %d\n", (int)get_version());
 159                 return 1;
 160         }
 161
 162         if ((SMC_inw (&dev, BANK_SELECT) & 0xFF00) != 0x3300) {
 163                 printf("SMSC91111 not found.\n");
 164                 return 2;
 165         }
 166
 167         /* Called without parameters - print MAC address */
 168         if (argc < 2) {
 169                 verify_macaddr(&dev, NULL);
 170                 return 0;
 171         }
 172
 173         /* Print help message */
 174         if (argv[1][1] == 'h') {
 175                 printf("VoiceBlue EEPROM writer\n");
 176                 printf("Built: %s at %s\n", U_BOOT_DATE, U_BOOT_TIME);
 177                 printf("Usage:\n\t<mac_address> [<element_1>] [<...>]\n");
 178                 return 0;
 179         }
 180
 181         /* Try to parse information elements */
 182         len = sizeof(buf);
 183         p = buf;
 184         for (i = 2; i < argc; i++) {
 185                 ret = parse_element(argv[i], p, len);
 186                 switch (ret) {
 187                 case -1:
 188                         printf("Element %d: malformed\n", i - 1);
 189                         return 3;
 190                 case -2:
 191                         printf("Element %d: odd character count\n", i - 1);
 192                         return 3;
 193                 case -3:
 194                         printf("Out of EEPROM memory\n");
 195                         return 3;
 196                 default:
 197                         p += ret;
 198                         len -= ret;
 199                 }
 200         }
 201
 202         /* First argument (MAC) is mandatory */
 203         set_mac(&dev, argv[1]);
 204         if (verify_macaddr(&dev, argv[1])) {
 205                 printf("*** MAC address does not match! ***\n");
 206                 return 4;
 207         }
 208
 209         while (len--)
 210                 *p++ = 0;
 211
 212         write_data(&dev, (u16 *)buf, sizeof(buf) >> 1);
 213
 214         return 0;
 215 }