examples/smc91111_eeprom.c

   1 /*
   2  * (C) Copyright 2004
   3  * Robin Getz rgetz@blacfin.uclinux.org
   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
   9  * modify it under the terms of the GNU General Public License as
  10  * published by the Free Software Foundation; either version 2 of
  11  * the License, or (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  21  * MA 02111-1307 USA
  22  *
  23  * Heavily borrowed from the following peoples GPL'ed software:
  24  *  - Wolfgang Denk, DENX Software Engineering, wd@denx.de
  25  *       Das U-boot
  26  *  - Ladislav Michl ladis@linux-mips.org
  27  *       A rejected patch on the U-Boot mailing list
  28  */
  29
  30 #include <common.h>
  31 #include <exports.h>
  32 #include "../drivers/smc91111.h"
  33
  34 #define SMC_BASE_ADDRESS CONFIG_SMC91111_BASE
  35 #define EEPROM          0x1;
  36 #define MAC             0x2;
  37 #define UNKNOWN         0x4;
  38
  39 void dump_reg (void);
  40 void dump_eeprom (void);
  41 int write_eeprom_reg (int, int);
  42 void copy_from_eeprom (void);
  43 void print_MAC (void);
  44 int read_eeprom_reg (int);
  45 void print_macaddr (void);
  46
  47 int smc91111_eeprom (int argc, char *argv[])
  48 {
  49         int c, i, j, done, line, reg, value, start, what;
  50         char input[50];
  51
  52         /* Print the ABI version */
  53         app_startup (argv);
  54         if (XF_VERSION != (int) get_version ()) {
  55                 printf ("Expects ABI version %d\n", XF_VERSION);
  56                 printf ("Actual U-Boot ABI version %d\n",
  57                         (int) get_version ());
  58                 printf ("Can't run\n\n");
  59                 return (0);
  60         }
  61
  62         asm ("p2.h = 0xFFC0;");
  63         asm ("p2.l = 0x0730;");
  64         asm ("r0 = 0x01;");
  65         asm ("w[p2] = r0;");
  66         asm ("ssync;");
  67
  68         asm ("p2.h = 0xffc0;");
  69         asm ("p2.l = 0x0708;");
  70         asm ("r0 = 0x01;");
  71         asm ("w[p2] = r0;");
  72         asm ("ssync;");
  73
  74         if ((SMC_inw (BANK_SELECT) & 0xFF00) != 0x3300) {
  75                 printf ("Can't find SMSC91111\n");
  76                 return (0);
  77         }
  78
  79         done = 0;
  80         what = UNKNOWN;
  81         printf ("\n");
  82         while (!done) {
  83                 /* print the prompt */
  84                 printf ("SMC91111> ");
  85                 line = 0;
  86                 i = 0;
  87                 start = 1;
  88                 while (!line) {
  89                         /* Wait for a keystroke */
  90                         while (!tstc ());
  91
  92                         c = getc ();
  93                         /* Make Uppercase */
  94                         if (c >= 'Z')
  95                                 c -= ('a' - 'A');
  96                         /* printf(" |%02x| ",c); */
  97
  98                         switch (c) {
  99                         case '\r':      /* Enter                */
 100                         case '\n':
 101                                 input[i] = 0;
 102                                 puts ("\r\n");
 103                                 line = 1;
 104                                 break;
 105                         case '\0':      /* nul                  */
 106                                 continue;
 107
 108                         case 0x03:      /* ^C - break           */
 109                                 input[0] = 0;
 110                                 i = 0;
 111                                 line = 1;
 112                                 done = 1;
 113                                 break;
 114
 115                         case 0x5F:
 116                         case 0x08:      /* ^H  - backspace      */
 117                         case 0x7F:      /* DEL - backspace      */
 118                                 if (i > 0) {
 119                                         puts ("\b \b");
 120                                         i--;
 121                                 }
 122                                 break;
 123                         default:
 124                                 if (start) {
 125                                         if ((c == 'W') || (c == 'D')
 126                                             || (c == 'M') || (c == 'C')
 127                                             || (c == 'P')) {
 128                                                 putc (c);
 129                                                 input[i] = c;
 130                                                 if (i <= 45)
 131                                                         i++;
 132                                                 start = 0;
 133                                         }
 134                                 } else {
 135                                         if ((c >= '0' && c <= '9')
 136                                             || (c >= 'A' && c <= 'F')
 137                                             || (c == 'E') || (c == 'M')
 138                                             || (c == ' ')) {
 139                                                 putc (c);
 140                                                 input[i] = c;
 141                                                 if (i <= 45)
 142                                                         i++;
 143                                                 break;
 144                                         }
 145                                 }
 146                                 break;
 147                         }
 148                 }
 149
 150                 for (; i < 49; i++)
 151                         input[i] = 0;
 152
 153                 switch (input[0]) {
 154                 case ('W'):
 155                         /* Line should be w reg value */
 156                         i = 0;
 157                         reg = 0;
 158                         value = 0;
 159                         /* Skip to the next space or end) */
 160                         while ((input[i] != ' ') && (input[i] != 0))
 161                                 i++;
 162
 163                         if (input[i] != 0)
 164                                 i++;
 165
 166                         /* Are we writing to EEPROM or MAC */
 167                         switch (input[i]) {
 168                         case ('E'):
 169                                 what = EEPROM;
 170                                 break;
 171                         case ('M'):
 172                                 what = MAC;
 173                                 break;
 174                         default:
 175                                 what = UNKNOWN;
 176                                 break;
 177                         }
 178
 179                         /* skip to the next space or end */
 180                         while ((input[i] != ' ') && (input[i] != 0))
 181                                 i++;
 182                         if (input[i] != 0)
 183                                 i++;
 184
 185                         /* Find register to write into */
 186                         j = 0;
 187                         while ((input[i] != ' ') && (input[i] != 0)) {
 188                                 j = input[i] - 0x30;
 189                                 if (j >= 0xA) {
 190                                         j -= 0x07;
 191                                 }
 192                                 reg = (reg * 0x10) + j;
 193                                 i++;
 194                         }
 195
 196                         while ((input[i] != ' ') && (input[i] != 0))
 197                                 i++;
 198
 199                         if (input[i] != 0)
 200                                 i++;
 201                         else
 202                                 what = UNKNOWN;
 203
 204                         /* Get the value to write */
 205                         j = 0;
 206                         while ((input[i] != ' ') && (input[i] != 0)) {
 207                                 j = input[i] - 0x30;
 208                                 if (j >= 0xA) {
 209                                         j -= 0x07;
 210                                 }
 211                                 value = (value * 0x10) + j;
 212                                 i++;
 213                         }
 214
 215                         switch (what) {
 216                         case 1:
 217                                 printf ("Writing EEPROM register %02x with %04x\n",
 218                                         reg, value);
 219                                 write_eeprom_reg (value, reg);
 220                                 break;
 221                         case 2:
 222                                 printf ("Writing MAC register bank %i,
 223                                         reg %02x with %04x\n", reg >> 4, reg & 0xE, value);
 224                                 SMC_SELECT_BANK (reg >> 4);
 225                                 SMC_outw (value, reg & 0xE);
 226                                 break;
 227                         default:
 228                                 printf ("Wrong\n");
 229                                 break;
 230                         }
 231                         break;
 232                 case ('D'):
 233                         dump_eeprom ();
 234                         break;
 235                 case ('M'):
 236                         dump_reg ();
 237                         break;
 238                 case ('C'):
 239                         copy_from_eeprom ();
 240                         break;
 241                 case ('P'):
 242                         print_macaddr ();
 243                         break;
 244                 default:
 245                         break;
 246                 }
 247
 248         }
 249
 250         return (0);
 251 }
 252
 253 void copy_from_eeprom (void)
 254 {
 255         int i;
 256
 257         SMC_SELECT_BANK (1);
 258         SMC_outw ((SMC_inw (CTL_REG) & !CTL_EEPROM_SELECT) | CTL_RELOAD,
 259                   CTL_REG);
 260         i = 100;
 261         while ((SMC_inw (CTL_REG) & CTL_RELOAD) && --i)
 262                 udelay (100);
 263         if (i == 0) {
 264                 printf ("Timeout Refreshing EEPROM registers\n");
 265         } else {
 266                 printf ("EEPROM contents copied to MAC\n");
 267         }
 268
 269 }
 270
 271 void print_macaddr (void)
 272 {
 273         int i, j, k, mac[6];
 274
 275         printf ("Current MAC Address in SMSC91111 ");
 276         SMC_SELECT_BANK (1);
 277         for (i = 0; i < 5; i++) {
 278                 printf ("%02x:", SMC_inb (ADDR0_REG + i));
 279         }
 280
 281         printf ("%02x\n", SMC_inb (ADDR0_REG + 5));
 282
 283         i = 0;
 284         for (j = 0x20; j < 0x23; j++) {
 285                 k = read_eeprom_reg (j);
 286                 mac[i] = k & 0xFF;
 287                 i++;
 288                 mac[i] = k >> 8;
 289                 i++;
 290         }
 291
 292         printf ("Current MAC Address in EEPROM    ");
 293         for (i = 0; i < 5; i++)
 294                 printf ("%02x:", mac[i]);
 295         printf ("%02x\n", mac[5]);
 296
 297 }
 298 void dump_eeprom (void)
 299 {
 300         int j, k;
 301
 302         printf ("IOS2-0    ");
 303         for (j = 0; j < 8; j++) {
 304                 printf ("%03x     ", j);
 305         }
 306         printf ("\n");
 307
 308         for (k = 0; k < 4; k++) {
 309                 if (k == 0)
 310                         printf ("CONFIG ");
 311                 if (k == 1)
 312                         printf ("BASE   ");
 313                 if ((k == 2) || (k == 3))
 314                         printf ("       ");
 315                 for (j = 0; j < 0x20; j += 4) {
 316                         printf ("%02x:%04x ", j + k, read_eeprom_reg (j + k));
 317                 }
 318                 printf ("\n");
 319         }
 320
 321         for (j = 0x20; j < 0x40; j++) {
 322                 if ((j & 0x07) == 0)
 323                         printf ("\n");
 324                 printf ("%02x:%04x ", j, read_eeprom_reg (j));
 325         }
 326         printf ("\n");
 327
 328 }
 329
 330 int read_eeprom_reg (int reg)
 331 {
 332         int timeout;
 333
 334         SMC_SELECT_BANK (2);
 335         SMC_outw (reg, PTR_REG);
 336
 337         SMC_SELECT_BANK (1);
 338         SMC_outw (SMC_inw (CTL_REG) | CTL_EEPROM_SELECT | CTL_RELOAD,
 339                   CTL_REG);
 340         timeout = 100;
 341         while ((SMC_inw (CTL_REG) & CTL_RELOAD) && --timeout)
 342                 udelay (100);
 343         if (timeout == 0) {
 344                 printf ("Timeout Reading EEPROM register %02x\n", reg);
 345                 return 0;
 346         }
 347
 348         return SMC_inw (GP_REG);
 349
 350 }
 351
 352 int write_eeprom_reg (int value, int reg)
 353 {
 354         int timeout;
 355
 356         SMC_SELECT_BANK (2);
 357         SMC_outw (reg, PTR_REG);
 358
 359         SMC_SELECT_BANK (1);
 360         SMC_outw (value, GP_REG);
 361         SMC_outw (SMC_inw (CTL_REG) | CTL_EEPROM_SELECT | CTL_STORE, CTL_REG);
 362         timeout = 100;
 363         while ((SMC_inw (CTL_REG) & CTL_STORE) && --timeout)
 364                 udelay (100);
 365         if (timeout == 0) {
 366                 printf ("Timeout Writing EEPROM register %02x\n", reg);
 367                 return 0;
 368         }
 369
 370         return 1;
 371
 372 }
 373
 374 void dump_reg (void)
 375 {
 376         int i, j;
 377
 378         printf ("    ");
 379         for (j = 0; j < 4; j++) {
 380                 printf ("Bank%i ", j);
 381         }
 382         printf ("\n");
 383         for (i = 0; i < 0xF; i += 2) {
 384                 printf ("%02x  ", i);
 385                 for (j = 0; j < 4; j++) {
 386                         SMC_SELECT_BANK (j);
 387                         printf ("%04x  ", SMC_inw (i));
 388                 }
 389                 printf ("\n");
 390         }
 391 }