board/netstar/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 #include <common.h>
  26 #include <exports.h>
  27 #include <timestamp.h>
  28 #include <net.h>
  29 #include "../drivers/net/smc91111.h"
  30
  31 static struct eth_device dev = {
  32         .iobase = CONFIG_SMC91111_BASE
  33 };
  34
  35 static u16 read_eeprom_reg(u16 reg)
  36 {
  37         int timeout;
  38
  39         SMC_SELECT_BANK(&dev, 2);
  40         SMC_outw(&dev, reg, PTR_REG);
  41
  42         SMC_SELECT_BANK(&dev, 1);
  43         SMC_outw(&dev, SMC_inw(&dev, CTL_REG) | CTL_EEPROM_SELECT |
  44                 CTL_RELOAD, CTL_REG);
  45
  46         timeout = 100;
  47
  48         while ((SMC_inw(&dev, CTL_REG) & CTL_RELOAD) && --timeout)
  49                 udelay(100);
  50         if (timeout == 0) {
  51                 printf("Timeout reading register %02x\n", reg);
  52                 return 0;
  53         }
  54
  55         return SMC_inw(&dev, GP_REG);
  56 }
  57
  58 static int write_eeprom_reg(u16 value, u16 reg)
  59 {
  60         int timeout;
  61
  62         SMC_SELECT_BANK(&dev, 2);
  63         SMC_outw(&dev, reg, PTR_REG);
  64
  65         SMC_SELECT_BANK(&dev, 1);
  66
  67         SMC_outw(&dev, value, GP_REG);
  68         SMC_outw(&dev, SMC_inw(&dev, CTL_REG) | CTL_EEPROM_SELECT |
  69                 CTL_STORE, CTL_REG);
  70
  71         timeout = 100;
  72
  73         while ((SMC_inw(&dev, CTL_REG) & CTL_STORE) && --timeout)
  74                 udelay(100);
  75         if (timeout == 0) {
  76                 printf("Timeout writing register %02x\n", reg);
  77                 return 0;
  78         }
  79
  80         return 1;
  81 }
  82
  83 static int write_data(u16 *buf, int len)
  84 {
  85         u16 reg = 0x23;
  86
  87         while (len--)
  88                 write_eeprom_reg(*buf++, reg++);
  89
  90         return 0;
  91 }
  92
  93 static int verify_macaddr(char *s)
  94 {
  95         u16 reg;
  96         int i, err = 0;
  97
  98         puts("HWaddr: ");
  99         for (i = 0; i < 3; i++) {
 100                 reg = read_eeprom_reg(0x20 + i);
 101                 printf("%02x:%02x%c", reg & 0xff, reg >> 8, i != 2 ? ':' : '\n');
 102                 if (s)
 103                         err |= reg != ((u16 *)s)[i];
 104         }
 105
 106         return err ? 0 : 1;
 107 }
 108
 109 static int set_mac(char *s)
 110 {
 111         int i;
 112         char *e, eaddr[6];
 113
 114         /* turn string into mac value */
 115         for (i = 0; i < 6; i++) {
 116                 eaddr[i] = simple_strtoul(s, &e, 16);
 117                 s = (*e) ? e+1 : e;
 118         }
 119
 120         for (i = 0; i < 3; i++)
 121                 write_eeprom_reg(*(((u16 *)eaddr) + i), 0x20 + i);
 122
 123         return 0;
 124 }
 125
 126 static int parse_element(char *s, unsigned char *buf, int len)
 127 {
 128         int cnt;
 129         char *p, num[3];
 130         unsigned char id;
 131
 132         id = simple_strtoul(s, &p, 16);
 133         if (*p++ != ':')
 134                 return -1;
 135         cnt = 2;
 136         num[2] = 0;
 137         for (; *p; p += 2) {
 138                 if (p[1] == 0)
 139                         return -2;
 140                 if (cnt + 3 > len)
 141                         return -3;
 142                 num[0] = p[0];
 143                 num[1] = p[1];
 144                 buf[cnt++] = simple_strtoul(num, NULL, 16);
 145         }
 146         buf[0] = id;
 147         buf[1] = cnt - 2;
 148
 149         return cnt;
 150 }
 151
 152 int eeprom(int argc, char * const argv[])
 153 {
 154         int i, len, ret;
 155         unsigned char buf[58], *p;
 156
 157         app_startup(argv);
 158         i = get_version();
 159         if (i != XF_VERSION) {
 160                 printf("Using ABI version %d, but U-Boot provides %d\n",
 161                         XF_VERSION, i);
 162                 return 1;
 163         }
 164
 165         if ((SMC_inw(&dev, BANK_SELECT) & 0xFF00) != 0x3300) {
 166                 puts("SMSC91111 not found\n");
 167                 return 2;
 168         }
 169
 170         /* Called without parameters - print MAC address */
 171         if (argc < 2) {
 172                 verify_macaddr(NULL);
 173                 return 0;
 174         }
 175
 176         /* Print help message */
 177         if (argv[1][1] == 'h') {
 178                 puts("NetStar EEPROM writer\n"
 179                         "Built: " U_BOOT_DATE " at " U_BOOT_TIME "\n"
 180                         "Usage:\n\t<mac_address> [<element_1>] [<...>]\n");
 181                 return 0;
 182         }
 183
 184         /* Try to parse information elements */
 185         len = sizeof(buf);
 186         p = buf;
 187         for (i = 2; i < argc; i++) {
 188                 ret = parse_element(argv[i], p, len);
 189                 switch (ret) {
 190                 case -1:
 191                         printf("Element %d: malformed\n", i - 1);
 192                         return 3;
 193                 case -2:
 194                         printf("Element %d: odd character count\n", i - 1);
 195                         return 3;
 196                 case -3:
 197                         puts("Out of EEPROM memory\n");
 198                         return 3;
 199                 default:
 200                         p += ret;
 201                         len -= ret;
 202                 }
 203         }
 204
 205         /* First argument (MAC) is mandatory */
 206         set_mac(argv[1]);
 207         if (verify_macaddr(argv[1])) {
 208                 puts("*** HWaddr does not match! ***\n");
 209                 return 4;
 210         }
 211
 212         while (len--)
 213                 *p++ = 0;
 214
 215         write_data((u16 *)buf, sizeof(buf) >> 1);
 216
 217         return 0;
 218 }