arch/powerpc/cpu/mpc512x/iim.c

   1 /*
   2  * Copyright 2008 Silicon Turnkey Express, Inc.
   3  * Martha Marx <mmarx@silicontkx.com>
   4  *
   5  * ADS5121 IIM (Fusebox) Interface
   6  *
   7  * See file CREDITS for list of people who contributed to this
   8  * project.
   9  *
  10  * This program is free software; you can redistribute it and/or
  11  * modify it under the terms of the GNU General Public License as
  12  * published by the Free Software Foundation; either version 2 of
  13  * the License, or (at your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  * GNU General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License
  21  * along with this program; if not, write to the Free Software
  22  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  23  * MA 02111-1307 USA
  24  */
  25
  26 #include <common.h>
  27 #include <command.h>
  28 #include <asm/io.h>
  29
  30 #ifdef CONFIG_CMD_FUSE
  31
  32 DECLARE_GLOBAL_DATA_PTR;
  33
  34 static char cur_bank = '1';
  35
  36 char *iim_err_msg(u32 err)
  37 {
  38         static char *IIM_errs[] = {
  39                 "Parity Error in cache",
  40                 "Explicit Sense Cycle Error",
  41                 "Write to Locked Register Error",
  42                 "Read Protect Error",
  43                 "Override Protect Error",
  44                 "Write Protect Error"};
  45
  46         int i;
  47
  48         if (!err)
  49                 return "";
  50         for (i = 1; i < 8; i++)
  51                 if (err & (1 << i))
  52                         printf("IIM - %s\n", IIM_errs[i-1]);
  53         return "";
  54 }
  55
  56 int in_range(int n, int min, int max, char *err, char *usg)
  57 {
  58         if (n > max || n < min) {
  59                 printf(err);
  60                 printf("Usage:\n%s\n", usg);
  61                 return 0;
  62         }
  63         return 1;
  64 }
  65
  66 int ads5121_fuse_read(int bank, int fstart, int num)
  67 {
  68         iim512x_t *iim = &((immap_t *) CONFIG_SYS_IMMR)->iim;
  69         u32 *iim_fb, dummy;
  70         int f, ctr;
  71
  72         out_be32(&iim->err, in_be32(&iim->err));
  73         if (bank == 0)
  74                 iim_fb = (u32 *)&(iim->fbac0);
  75         else
  76                 iim_fb = (u32 *)&(iim->fbac1);
  77 /* try a read to see if Read Protect is set */
  78         dummy = in_be32(&iim_fb[0]);
  79         if (in_be32(&iim->err) & IIM_ERR_RPE) {
  80                 printf("\tRead protect fuse is set\n");
  81                 out_be32(&iim->err, IIM_ERR_RPE);
  82                 return 0;
  83         }
  84         printf("Reading Bank %d cache\n", bank);
  85         for (f = fstart, ctr = 0; num > 0; ctr++, num--, f++) {
  86                 if (ctr % 4 == 0)
  87                         printf("F%2d:", f);
  88                 printf("\t%#04x", (u8)(iim_fb[f]));
  89                 if (ctr % 4 == 3)
  90                         printf("\n");
  91         }
  92         if (ctr % 4 != 0)
  93                 printf("\n");
  94 }
  95
  96 int ads5121_fuse_override(int bank, int f, u8 val)
  97 {
  98         iim512x_t *iim = &((immap_t *) CONFIG_SYS_IMMR)->iim;
  99         u32 *iim_fb;
 100         u32 iim_stat;
 101         int i;
 102
 103         out_be32(&iim->err, in_be32(&iim->err));
 104         if (bank == 0)
 105                 iim_fb = (u32 *)&(iim->fbac0);
 106         else
 107                 iim_fb = (u32 *)&(iim->fbac1);
 108 /* try a read to see if Read Protect is set */
 109         iim_stat = in_be32(&iim_fb[0]);
 110         if (in_be32(&iim->err) & IIM_ERR_RPE) {
 111                 printf("Read protect fuse is set on bank %d;"
 112                         "Override protect may also be set\n", bank);
 113                 printf("An attempt will be made to override\n");
 114                 out_be32(&iim->err, IIM_ERR_RPE);
 115         }
 116         if (iim_stat & IIM_FBAC_FBOP) {
 117                 printf("Override protect fuse is set on bank %d\n", bank);
 118                 return 1;
 119         }
 120         if (f > IIM_FMAX) /* reset the entire bank */
 121                 for (i = 0; i < IIM_FMAX + 1; i++)
 122                         out_be32(&iim_fb[i],  0);
 123         else
 124                 out_be32(&iim_fb[f], val);
 125         return 0;
 126 }
 127
 128 int ads5121_fuse_prog(cmd_tbl_t *cmdtp, int bank, char *fuseno_bitno)
 129 {
 130         iim512x_t *iim = &((immap_t *) CONFIG_SYS_IMMR)->iim;
 131         int f, i, bitno;
 132         u32 stat, err;
 133
 134         f = simple_strtol(fuseno_bitno, NULL, 10);
 135         if (f == 0 && fuseno_bitno[0] != '0')
 136                 f = -1;
 137         if (!in_range(f, 0, IIM_FMAX,
 138                 "<frow> must be between 0-31\n\n", cmdtp->usage))
 139                 return 1;
 140         bitno = -1;
 141         for (i = 0; i < 6; i++) {
 142                 if (fuseno_bitno[i] == '_') {
 143                         bitno = simple_strtol(&(fuseno_bitno[i+1]), NULL, 10);
 144                         if (bitno == 0 && fuseno_bitno[i+1] != '0')
 145                                 bitno = -1;
 146                         break;
 147                 }
 148         }
 149         if (!in_range(bitno, 0, 7, "Bit number ranges from 0-7\n"
 150                 "Example of <frow_bitno>: \"18_4\" sets bit 4 of row 18\n",
 151                 cmdtp->usage))
 152                 return 1;
 153         out_be32(&iim->err, in_be32(&iim->err));
 154         out_be32(&iim->prg_p, IIM_PRG_P_SET);
 155         out_be32(&iim->ua, IIM_SET_UA(bank, f));
 156         out_be32(&iim->la, IIM_SET_LA(f, bitno));
 157 #ifdef DEBUG
 158         printf("Programming disabled with DEBUG defined \n");
 159         printf(""Set up to pro
 160         printf("iim.ua = %x; iim.la = %x\n", iim->ua, iim->la);
 161 #else
 162         out_be32(&iim->fctl, IIM_FCTL_PROG_PULSE | IIM_FCTL_PROG);
 163         do
 164                 udelay(20);
 165         while ((stat = in_be32(&iim->stat)) & IIM_STAT_BUSY);
 166         out_be32(&iim->prg_p, 0);
 167         err = in_be32(&iim->err);
 168         if (stat & IIM_STAT_PRGD) {
 169                 if (!(err & (IIM_ERR_WPE | IIM_ERR_WPE))) {
 170                         printf("Fuse is successfully set");
 171                         if (err)
 172                                 printf(" - however there are other errors");
 173                         printf("\n");
 174                 }
 175                 iim->stat = 0;
 176         }
 177         if (err) {
 178                 iim_err_msg(err);
 179                 out_be32(&iim->err, in_be32(&iim->err));
 180         }
 181 #endif
 182 }
 183
 184 int ads5121_fuse_sense(int bank, int fstart, int num)
 185 {
 186         iim512x_t *iim = &((immap_t *) CONFIG_SYS_IMMR)->iim;
 187         u32 iim_fbac;
 188         u32 stat, err, err_hold = 0;
 189         int f, ctr;
 190
 191         out_be32(&iim->err, in_be32(&iim->err));
 192         if (bank == 0)
 193                 iim_fbac = in_be32(&iim->fbac0);
 194         else
 195                 iim_fbac = in_be32(&iim->fbac1);
 196         if (iim_fbac & IIM_FBAC_FBESP) {
 197                 printf("\tSense Protect disallows this operation\n");
 198                 out_be32(&iim->err, IIM_FBAC_FBESP);
 199                 return 1;
 200         }
 201         err = in_be32(&iim->err);
 202         if (err) {
 203                 iim_err_msg(err);
 204                 err_hold |= err;
 205         }
 206         if (err & IIM_ERR_RPE)
 207                 printf("\tRead protect fuse is set; "
 208                         "Sense Protect may be set but will be attempted\n");
 209         if (err)
 210                 out_be32(&iim->err, err);
 211         printf("Sensing fuse(s) on Bank %d\n", bank);
 212         for (f = fstart, ctr = 0; num > 0; ctr++, f++, num--) {
 213                 out_be32(&iim->ua, IIM_SET_UA(bank, f));
 214                 out_be32(&iim->la, IIM_SET_LA(f, 0));
 215                 out_be32(&iim->fctl,  IIM_FCTL_ESNS_N);
 216                 do
 217                         udelay(20);
 218                 while ((stat = in_be32(&iim->stat)) & IIM_STAT_BUSY);
 219                 err = in_be32(&iim->err);
 220                 if (err & IIM_ERR_SNSE) {
 221                         iim_err_msg(err);
 222                         out_be32(&iim->err, IIM_ERR_SNSE);
 223                         return 1;
 224                 }
 225                 if (stat & IIM_STAT_SNSD) {
 226                         out_be32(&iim->stat, 0);
 227                         if (ctr % 4 == 0)
 228                                 printf("F%2d:", f);
 229                         printf("\t%#04x", (u8)iim->sdat);
 230                         if (ctr % 4 == 3)
 231                                 printf("\n");
 232                 }
 233                 if (err) {
 234                         err_hold |= err;
 235                         out_be32(&iim->err, err);
 236                 }
 237         }
 238         if (ctr % 4 != 0)
 239                 printf("\n");
 240         if (err_hold)
 241                 iim_err_msg(err_hold);
 242
 243         return 0;
 244 }
 245
 246 int ads5121_fuse_stat(int bank)
 247 {
 248         iim512x_t *iim = &((immap_t *) CONFIG_SYS_IMMR)->iim;
 249         u32 iim_fbac;
 250         u32 err;
 251
 252         out_be32(&iim->err, in_be32(&iim->err));
 253         if (bank == 0)
 254                 iim_fbac = in_be32(&iim->fbac0);
 255         else
 256                 iim_fbac = in_be32(&iim->fbac1);
 257         err = in_be32(&iim->err);
 258         if (err)
 259                 iim_err_msg(err);
 260         if (err & IIM_ERR_RPE  || iim_fbac & IIM_FBAC_FBRP) {
 261                 if (iim_fbac == 0)
 262                         printf("Since protection settings can't be read - "
 263                                 "try sensing fuse row 0;\n");
 264                 return 0;
 265         }
 266         if (iim_fbac & IIM_PROTECTION)
 267                 printf("Protection Fuses Bank %d = %#04x:\n", bank, iim_fbac);
 268         else if (!(err & IIM_ERR_RPE))
 269                 printf("No Protection fuses are set\n");
 270         if (iim_fbac & IIM_FBAC_FBWP)
 271                 printf("\tWrite Protect fuse is set\n");
 272         if (iim_fbac & IIM_FBAC_FBOP)
 273                 printf("\tOverride Protect fuse is set\n");
 274         if (iim_fbac & IIM_FBAC_FBESP)
 275                 printf("\tSense Protect Fuse is set\n");
 276         out_be32(&iim->err, in_be32(&iim->err));
 277
 278         return 0;
 279 }
 280
 281 int do_ads5121_fuse(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
 282 {
 283         int frow, n, v, bank;
 284
 285         if (cur_bank == '0')
 286                 bank = 0;
 287         else
 288                 bank = 1;
 289
 290         switch (argc) {
 291         case 0:
 292         case 1:
 293                 printf("Usage:\n%s\n", cmdtp->usage);
 294                 return 1;
 295         case 2:
 296                 if (strncmp(argv[1], "stat", 4) == 0)
 297                         return ads5121_fuse_stat(bank);
 298                 if (strncmp(argv[1], "read", 4) == 0)
 299                         return ads5121_fuse_read(bank, 0, IIM_FMAX + 1);
 300                 if (strncmp(argv[1], "sense", 5) == 0)
 301                         return ads5121_fuse_sense(bank, 0, IIM_FMAX + 1);
 302                 if (strncmp(argv[1], "ovride", 6) == 0)
 303                         return ads5121_fuse_override(bank, IIM_FMAX + 1, 0);
 304                 if (strncmp(argv[1], "bank", 4) == 0) {
 305                         printf("Active Fuse Bank is %c\n", cur_bank);
 306                         return 0;
 307                 }
 308                 printf("Usage:\n%s\n", cmdtp->usage);
 309                 return 1;
 310         case 3:
 311                 if (strncmp(argv[1], "bank", 4) == 0) {
 312                         if (argv[2][0] == '0')
 313                                 cur_bank = '0';
 314                         else if (argv[2][0] == '1')
 315                                 cur_bank = '1';
 316                         else {
 317                                 printf("Usage:\n%s\n", cmdtp->usage);
 318                                 return 1;
 319                         }
 320
 321                         printf("Setting Active Fuse Bank to %c\n", cur_bank);
 322                         return 0;
 323                 }
 324                 if (strncmp(argv[1], "prog", 4) == 0)
 325                         return ads5121_fuse_prog(cmdtp, bank, argv[2]);
 326
 327                 frow = (int)simple_strtol(argv[2], NULL, 10);
 328                 if (frow == 0 && argv[2][0] != '0')
 329                         frow = -1;
 330                 if (!in_range(frow, 0, IIM_FMAX,
 331                         "<frow> must be between 0-31\n\n", cmdtp->usage))
 332                         return 1;
 333                 if (strncmp(argv[1], "read", 4) == 0)
 334                         return ads5121_fuse_read(bank, frow, 1);
 335                 if (strncmp(argv[1], "ovride", 6) == 0)
 336                         return ads5121_fuse_override(bank, frow, 0);
 337                 if (strncmp(argv[1], "sense", 5) == 0)
 338                         return ads5121_fuse_sense(bank, frow, 1);
 339                 printf("Usage:\n%s\n", cmdtp->usage);
 340                 return 1;
 341         case 4:
 342                 frow = (int)simple_strtol(argv[2], NULL, 10);
 343                 if (frow == 0 && argv[2][0] != '0')
 344                         frow = -1;
 345                 if (!in_range(frow, 0, IIM_FMAX,
 346                         "<frow> must be between 0-31\n\n", cmdtp->usage))
 347                         return 1;
 348                 if (strncmp(argv[1], "read", 4) == 0) {
 349                         n = (int)simple_strtol(argv[3], NULL, 10);
 350                         if (!in_range(frow + n, frow + 1, IIM_FMAX + 1,
 351                                 "<frow>+<n> must be between 1-32\n\n",
 352                                 cmdtp->usage))
 353                                 return 1;
 354                         return ads5121_fuse_read(bank, frow, n);
 355                 }
 356                 if (strncmp(argv[1], "ovride", 6) == 0) {
 357                         v = (int)simple_strtol(argv[3], NULL, 10);
 358                         return ads5121_fuse_override(bank, frow, v);
 359                 }
 360                 if (strncmp(argv[1], "sense", 5) == 0) {
 361                         n = (int)simple_strtol(argv[3], NULL, 10);
 362                         if (!in_range(frow + n, frow + 1, IIM_FMAX + 1,
 363                                 "<frow>+<n> must be between 1-32\n\n",
 364                                 cmdtp->usage))
 365                                 return 1;
 366                         return ads5121_fuse_sense(bank, frow, n);
 367                 }
 368                 printf("Usage:\n%s\n", cmdtp->usage);
 369                 return 1;
 370         default: /* at least 5 args */
 371                 printf("Usage:\n%s\n", cmdtp->usage);
 372                 return 1;
 373         }
 374 }
 375
 376 U_BOOT_CMD(
 377         fuse, CONFIG_SYS_MAXARGS, 0, do_ads5121_fuse,
 378         "   - Read, Sense, Override or Program Fuses\n",
 379         "bank <n>               - sets active Fuse Bank to 0 or 1\n"
 380         "                           no args shows current active bank\n"
 381         "fuse stat              - print active fuse bank's protection status\n"
 382         "fuse read [<frow> [<n>]] - print <n> fuse rows starting at <frow>\n"
 383         "                           no args to print entire bank's fuses\n"
 384         "fuse ovride [<frow> [<v>]]- override fuses at <frow> with <v>\n"
 385         "                           no <v> defaults to 0 for the row\n"
 386         "                           no args resets entire bank to 0\n"
 387         "                         NOTE - settings persist until hard reset\n"
 388         "fuse sense [<frow>]    - senses current fuse at <frow>\n"
 389         "                           no args for entire bank\n"
 390         "fuse prog <frow_bit>   - program fuse at row <frow>, bit <_bit>\n"
 391         "                           <frow> is 0-31, <bit> is 0-7; eg. 13_2 \n"
 392         "                         WARNING - this is permanent"
 393 );
 394 #endif /* CONFIG_CMD_FUSE */