board/r360mpi/flash.c

   1 /*
   2  * (C) Copyright 2001
   3  * Kyle Harris, Nexus Technologies, Inc. kharris@nexus-tech.net
   4  *
   5  * (C) Copyright 2001
   6  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   7  *
   8  * See file CREDITS for list of people who contributed to this
   9  * project.
  10  *
  11  * This program is free software; you can redistribute it and/or
  12  * modify it under the terms of the GNU General Public License as
  13  * published by the Free Software Foundation; either version 2 of
  14  * the License, or (at your option) any later version.
  15  *
  16  * This program is distributed in the hope that it will be useful,
  17  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19  * GNU General Public License for more details.
  20  *
  21  * You should have received a copy of the GNU General Public License
  22  * along with this program; if not, write to the Free Software
  23  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  24  * MA 02111-1307 USA
  25  */
  26
  27 /* #define DEBUG */
  28
  29 #include <common.h>
  30 #include <mpc8xx.h>
  31
  32 flash_info_t flash_info[CFG_MAX_FLASH_BANKS];   /* info for FLASH chips    */
  33
  34 #if defined(CFG_ENV_IS_IN_FLASH)
  35 # ifndef  CFG_ENV_ADDR
  36 #  define CFG_ENV_ADDR  (CFG_FLASH_BASE + CFG_ENV_OFFSET)
  37 # endif
  38 # ifndef  CFG_ENV_SIZE
  39 #  define CFG_ENV_SIZE  CFG_ENV_SECT_SIZE
  40 # endif
  41 # ifndef  CFG_ENV_SECT_SIZE
  42 #  define CFG_ENV_SECT_SIZE  CFG_ENV_SIZE
  43 # endif
  44 #endif
  45
  46 /*-----------------------------------------------------------------------
  47  * Protection Flags:
  48  */
  49 #define FLAG_PROTECT_SET        0x01
  50 #define FLAG_PROTECT_CLEAR      0x02
  51
  52 /* Board support for 1 or 2 flash devices */
  53 #undef FLASH_PORT_WIDTH32
  54 #define FLASH_PORT_WIDTH16
  55
  56 #ifdef FLASH_PORT_WIDTH16
  57 #define FLASH_PORT_WIDTH        ushort
  58 #define FLASH_PORT_WIDTHV       vu_short
  59 #else
  60 #define FLASH_PORT_WIDTH        ulong
  61 #define FLASH_PORT_WIDTHV       vu_long
  62 #endif
  63
  64 #define FPW                     FLASH_PORT_WIDTH
  65 #define FPWV                    FLASH_PORT_WIDTHV
  66
  67 /*-----------------------------------------------------------------------
  68  * Functions
  69  */
  70 static ulong flash_get_size (FPW * addr, flash_info_t * info);
  71 static int write_data (flash_info_t * info, ulong dest, FPW data);
  72 static void flash_get_offsets (ulong base, flash_info_t * info);
  73
  74 /*-----------------------------------------------------------------------
  75  */
  76
  77 unsigned long flash_init (void)
  78 {
  79         volatile immap_t *immap = (immap_t *) CFG_IMMR;
  80         volatile memctl8xx_t *memctl = &immap->im_memctl;
  81         unsigned long size_b0;
  82         int i;
  83
  84         /* Init: no FLASHes known */
  85         for (i = 0; i < CFG_MAX_FLASH_BANKS; ++i) {
  86                 flash_info[i].flash_id = FLASH_UNKNOWN;
  87         }
  88
  89         /* Static FLASH Bank configuration here - FIXME XXX */
  90         size_b0 = flash_get_size ((FPW *) FLASH_BASE0_PRELIM, &flash_info[0]);
  91
  92         if (flash_info[0].flash_id == FLASH_UNKNOWN) {
  93                 printf ("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n",
  94                         size_b0, size_b0 << 20);
  95         }
  96
  97         /* Remap FLASH according to real size */
  98         memctl->memc_or0 = CFG_OR_TIMING_FLASH | (-size_b0 & 0xFFFF8000);
  99         memctl->memc_br0 = (CFG_FLASH_BASE & BR_BA_MSK) | BR_PS_16 | BR_MS_GPCM | BR_V;
 100
 101         /* Re-do sizing to get full correct info */
 102         size_b0 = flash_get_size ((FPW *) CFG_FLASH_BASE, &flash_info[0]);
 103
 104         flash_get_offsets (CFG_FLASH_BASE, &flash_info[0]);
 105
 106 #if CFG_MONITOR_BASE >= CFG_FLASH_BASE
 107         /* monitor protection ON by default */
 108         (void) flash_protect (FLAG_PROTECT_SET,
 109                                 CFG_FLASH_BASE,
 110                                 CFG_FLASH_BASE + monitor_flash_len - 1,
 111                                 &flash_info[0]);
 112 #endif
 113
 114 #ifdef  CFG_ENV_IS_IN_FLASH
 115         /* ENV protection ON by default */
 116         flash_protect (FLAG_PROTECT_SET,
 117                         CFG_ENV_ADDR,
 118                         CFG_ENV_ADDR + CFG_ENV_SIZE - 1,
 119                         &flash_info[0]);
 120 #endif
 121
 122         flash_info[0].size = size_b0;
 123
 124         return (size_b0);
 125 }
 126
 127 /*-----------------------------------------------------------------------
 128  */
 129 static void flash_get_offsets (ulong base, flash_info_t * info)
 130 {
 131         int i;
 132
 133         if (info->flash_id == FLASH_UNKNOWN) {
 134                 return;
 135         }
 136
 137         if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_INTEL) {
 138                 for (i = 0; i < info->sector_count; i++) {
 139                         info->start[i] = base + (i * 0x00020000);
 140                 }
 141         }
 142 }
 143
 144 /*-----------------------------------------------------------------------
 145  */
 146 void flash_print_info (flash_info_t * info)
 147 {
 148         int i;
 149
 150         if (info->flash_id == FLASH_UNKNOWN) {
 151                 printf ("missing or unknown FLASH type\n");
 152                 return;
 153         }
 154
 155         switch (info->flash_id & FLASH_VENDMASK) {
 156         case FLASH_MAN_INTEL:
 157                 printf ("INTEL ");
 158                 break;
 159         default:
 160                 printf ("Unknown Vendor ");
 161                 break;
 162         }
 163
 164         switch (info->flash_id & FLASH_TYPEMASK) {
 165         case FLASH_28F320J3A:
 166                 printf ("28F320J3A\n");
 167                 break;
 168         case FLASH_28F640J3A:
 169                 printf ("28F640J3A\n");
 170                 break;
 171         case FLASH_28F128J3A:
 172                 printf ("28F128J3A\n");
 173                 break;
 174         default:
 175                 printf ("Unknown Chip Type\n");
 176                 break;
 177         }
 178
 179         printf ("  Size: %ld MB in %d Sectors\n",
 180                         info->size >> 20, info->sector_count);
 181
 182         printf ("  Sector Start Addresses:");
 183         for (i = 0; i < info->sector_count; ++i) {
 184                 if ((i % 5) == 0)
 185                         printf ("\n   ");
 186                 printf (" %08lX%s",
 187                         info->start[i],
 188                         info->protect[i] ? " (RO)" : "     ");
 189         }
 190         printf ("\n");
 191         return;
 192 }
 193
 194 /*-----------------------------------------------------------------------
 195  */
 196
 197
 198 /*-----------------------------------------------------------------------
 199  */
 200
 201 /*
 202  * The following code cannot be run from FLASH!
 203  */
 204
 205 static ulong flash_get_size (FPW * addr, flash_info_t * info)
 206 {
 207         FPW value;
 208
 209         /* Make sure Block Lock Bits get cleared */
 210         addr[0] = (FPW) 0x00FF00FF;
 211         addr[0] = (FPW) 0x00600060;
 212         addr[0] = (FPW) 0x00D000D0;
 213         addr[0] = (FPW) 0x00FF00FF;
 214
 215         /* Write auto select command: read Manufacturer ID */
 216         addr[0x5555] = (FPW) 0x00AA00AA;
 217         addr[0x2AAA] = (FPW) 0x00550055;
 218         addr[0x5555] = (FPW) 0x00900090;
 219
 220         value = addr[0];
 221
 222         debug ("Manuf. ID @ 0x%08lx: 0x%08lx\n", (ulong)addr, value);
 223
 224         switch (value) {
 225         case (FPW) INTEL_MANUFACT:
 226                 info->flash_id = FLASH_MAN_INTEL;
 227                 break;
 228         default:
 229                 info->flash_id = FLASH_UNKNOWN;
 230                 info->sector_count = 0;
 231                 info->size = 0;
 232                 addr[0] = (FPW) 0x00FF00FF;     /* restore read mode */
 233                 return (0);                     /* no or unknown flash  */
 234         }
 235
 236         value = addr[1];                        /* device ID        */
 237
 238         debug ("Device ID @ 0x%08lx: 0x%08lx\n", (ulong)(&addr[1]), value);
 239
 240         switch (value) {
 241         case (FPW) INTEL_ID_28F320J3A:
 242                 info->flash_id += FLASH_28F320J3A;
 243                 info->sector_count = 32;
 244                 info->size = 0x00400000;
 245                 break;                          /* => 4 MB     */
 246
 247         case (FPW) INTEL_ID_28F640J3A:
 248                 info->flash_id += FLASH_28F640J3A;
 249                 info->sector_count = 64;
 250                 info->size = 0x00800000;
 251                 break;                          /* => 8 MB     */
 252
 253         case (FPW) INTEL_ID_28F128J3A:
 254                 info->flash_id += FLASH_28F128J3A;
 255                 info->sector_count = 128;
 256                 info->size = 0x01000000;
 257                 break;                          /* => 16 MB     */
 258
 259         default:
 260                 info->flash_id = FLASH_UNKNOWN;
 261                 break;
 262         }
 263
 264         if (info->sector_count > CFG_MAX_FLASH_SECT) {
 265                 printf ("** ERROR: sector count %d > max (%d) **\n",
 266                                 info->sector_count, CFG_MAX_FLASH_SECT);
 267                 info->sector_count = CFG_MAX_FLASH_SECT;
 268         }
 269
 270         addr[0] = (FPW) 0x00FF00FF;     /* restore read mode */
 271
 272         return (info->size);
 273 }
 274
 275
 276 /*-----------------------------------------------------------------------
 277  */
 278
 279 int flash_erase (flash_info_t * info, int s_first, int s_last)
 280 {
 281         int flag, prot, sect;
 282         ulong type, start, now, last;
 283         int rcode = 0;
 284
 285         if ((s_first < 0) || (s_first > s_last)) {
 286                 if (info->flash_id == FLASH_UNKNOWN) {
 287                         printf ("- missing\n");
 288                 } else {
 289                         printf ("- no sectors to erase\n");
 290                 }
 291                 return 1;
 292         }
 293
 294         type = (info->flash_id & FLASH_VENDMASK);
 295         if ((type != FLASH_MAN_INTEL)) {
 296                 printf ("Can't erase unknown flash type %08lx - aborted\n",
 297                         info->flash_id);
 298                 return 1;
 299         }
 300
 301         prot = 0;
 302         for (sect = s_first; sect <= s_last; ++sect) {
 303                 if (info->protect[sect]) {
 304                         prot++;
 305                 }
 306         }
 307
 308         if (prot) {
 309                 printf ("- Warning: %d protected sectors will not be erased!\n",
 310                         prot);
 311         } else {
 312                 printf ("\n");
 313         }
 314
 315         start = get_timer (0);
 316         last = start;
 317         /* Start erase on unprotected sectors */
 318         for (sect = s_first; sect <= s_last; sect++) {
 319                 if (info->protect[sect] == 0) { /* not protected */
 320                         FPWV *addr = (FPWV *) (info->start[sect]);
 321                         FPW status;
 322
 323                         /* Disable interrupts which might cause a timeout here */
 324                         flag = disable_interrupts ();
 325
 326                         *addr = (FPW) 0x00500050;       /* clear status register */
 327                         *addr = (FPW) 0x00200020;       /* erase setup */
 328                         *addr = (FPW) 0x00D000D0;       /* erase confirm */
 329
 330                         /* re-enable interrupts if necessary */
 331                         if (flag)
 332                                 enable_interrupts ();
 333
 334                         /* wait at least 80us - let's wait 1 ms */
 335                         udelay (1000);
 336
 337                         while (((status = *addr) & (FPW) 0x00800080) != (FPW) 0x00800080) {
 338                             if ((now = get_timer (start)) > CFG_FLASH_ERASE_TOUT) {
 339                                 printf ("Timeout\n");
 340                                 *addr = (FPW) 0x00B000B0;       /* suspend erase     */
 341                                 *addr = (FPW) 0x00FF00FF;       /* reset to read mode */
 342                                 rcode = 1;
 343                                 break;
 344                             }
 345
 346                             /* show that we're waiting */
 347                             if ((now - last) > 1000) {  /* every second */
 348                                 putc ('.');
 349                                 last = now;
 350                             }
 351                         }
 352
 353                         *addr = (FPW) 0x00FF00FF;       /* reset to read mode */
 354                 }
 355         }
 356         printf (" done\n");
 357         return rcode;
 358 }
 359
 360 /*-----------------------------------------------------------------------
 361  * Copy memory to flash, returns:
 362  * 0 - OK
 363  * 1 - write timeout
 364  * 2 - Flash not erased
 365  * 4 - Flash not identified
 366  */
 367
 368 int write_buff (flash_info_t * info, uchar * src, ulong addr, ulong cnt)
 369 {
 370         ulong cp, wp;
 371         FPW data;
 372
 373         int i, l, rc, port_width;
 374
 375         if (info->flash_id == FLASH_UNKNOWN) {
 376                 return 4;
 377         }
 378 /* get lower word aligned address */
 379 #ifdef FLASH_PORT_WIDTH16
 380         wp = (addr & ~1);
 381         port_width = 2;
 382 #else
 383         wp = (addr & ~3);
 384         port_width = 4;
 385 #endif
 386
 387         /*
 388          * handle unaligned start bytes
 389          */
 390         if ((l = addr - wp) != 0) {
 391                 data = 0;
 392                 for (i = 0, cp = wp; i < l; ++i, ++cp) {
 393                         data = (data << 8) | (*(uchar *) cp);
 394                 }
 395                 for (; i < port_width && cnt > 0; ++i) {
 396                         data = (data << 8) | *src++;
 397                         --cnt;
 398                         ++cp;
 399                 }
 400                 for (; cnt == 0 && i < port_width; ++i, ++cp) {
 401                         data = (data << 8) | (*(uchar *) cp);
 402                 }
 403
 404                 if ((rc = write_data (info, wp, data)) != 0) {
 405                         return (rc);
 406                 }
 407                 wp += port_width;
 408         }
 409
 410         /*
 411          * handle word aligned part
 412          */
 413         while (cnt >= port_width) {
 414                 data = 0;
 415                 for (i = 0; i < port_width; ++i) {
 416                         data = (data << 8) | *src++;
 417                 }
 418                 if ((rc = write_data (info, wp, data)) != 0) {
 419                         return (rc);
 420                 }
 421                 wp += port_width;
 422                 cnt -= port_width;
 423         }
 424
 425         if (cnt == 0) {
 426                 return (0);
 427         }
 428
 429         /*
 430          * handle unaligned tail bytes
 431          */
 432         data = 0;
 433         for (i = 0, cp = wp; i < port_width && cnt > 0; ++i, ++cp) {
 434                 data = (data << 8) | *src++;
 435                 --cnt;
 436         }
 437         for (; i < port_width; ++i, ++cp) {
 438                 data = (data << 8) | (*(uchar *) cp);
 439         }
 440
 441         return (write_data (info, wp, data));
 442 }
 443
 444 /*-----------------------------------------------------------------------
 445  * Write a word or halfword to Flash, returns:
 446  * 0 - OK
 447  * 1 - write timeout
 448  * 2 - Flash not erased
 449  */
 450 static int write_data (flash_info_t * info, ulong dest, FPW data)
 451 {
 452         FPWV *addr = (FPWV *) dest;
 453         ulong status;
 454         ulong start;
 455         int flag;
 456
 457         /* Check if Flash is (sufficiently) erased */
 458         if ((*addr & data) != data) {
 459                 printf ("not erased at %08lx (%x)\n", (ulong) addr, *addr);
 460                 return (2);
 461         }
 462         /* Disable interrupts which might cause a timeout here */
 463         flag = disable_interrupts ();
 464
 465         *addr = (FPW) 0x00400040;       /* write setup */
 466         *addr = data;
 467
 468         /* re-enable interrupts if necessary */
 469         if (flag)
 470                 enable_interrupts ();
 471
 472         start = get_timer (0);
 473
 474         while (((status = *addr) & (FPW) 0x00800080) != (FPW) 0x00800080) {
 475                 if (get_timer (start) > CFG_FLASH_WRITE_TOUT) {
 476                         *addr = (FPW) 0x00FF00FF;       /* restore read mode */
 477                         return (1);
 478                 }
 479         }
 480
 481         *addr = (FPW) 0x00FF00FF;       /* restore read mode */
 482
 483         return (0);
 484 }