board/MAI/AmigaOneG3SE/flash_new.c

   1 /*
   2  * (C) Copyright 2001
   3  * Josh Huber <huber@mclx.com>, Mission Critical Linux, Inc.
   4  *
   5  * (C) Copyright 2002
   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 #include <common.h>
  28 #include <flash.h>
  29 #include <asm/io.h>
  30 #include "memio.h"
  31
  32 /*---------------------------------------------------------------------*/
  33 #undef DEBUG_FLASH
  34 //#define DEBUG_FLASH
  35
  36 #ifdef DEBUG_FLASH
  37 #define DEBUGF(fmt,args...) printf(fmt ,##args)
  38 #else
  39 #define DEBUGF(fmt,args...)
  40 #endif
  41 /*---------------------------------------------------------------------*/
  42
  43 flash_info_t    flash_info[CFG_MAX_FLASH_BANKS];
  44
  45 static ulong flash_get_size (ulong addr, flash_info_t *info);
  46 static int flash_get_offsets (ulong base, flash_info_t *info);
  47 static int write_word (flash_info_t *info, ulong dest, ulong data);
  48 static void flash_reset (ulong addr);
  49
  50 int flash_xd_nest;
  51
  52 static void flash_to_xd(void)
  53 {
  54     unsigned char x;
  55
  56     flash_xd_nest ++;
  57
  58     if (flash_xd_nest == 1)
  59     {
  60         DEBUGF("Flash on XD\n");
  61         x = pci_read_cfg_byte(0, 0, 0x74);
  62         pci_write_cfg_byte(0, 0, 0x74, x|1);
  63     }
  64 }
  65
  66 static void flash_to_mem(void)
  67 {
  68     unsigned char x;
  69
  70     flash_xd_nest --;
  71
  72     if (flash_xd_nest == 0)
  73     {
  74         DEBUGF("Flash on memory bus\n");
  75         x = pci_read_cfg_byte(0, 0, 0x74);
  76         pci_write_cfg_byte(0, 0, 0x74, x&0xFE);
  77     }
  78 }
  79
  80 unsigned long flash_init_old(void)
  81 {
  82     int i;
  83
  84     for (i = 0; i < CFG_MAX_FLASH_BANKS; i++)
  85     {
  86         flash_info[i].flash_id = FLASH_UNKNOWN;
  87         flash_info[i].sector_count = 0;
  88         flash_info[i].size = 0;
  89     }
  90
  91
  92     return 1;
  93 }
  94
  95 unsigned long flash_init (void)
  96 {
  97         unsigned int i;
  98         unsigned long flash_size = 0;
  99
 100         flash_xd_nest = 0;
 101
 102         flash_to_xd();
 103
 104         /* Init: no FLASHes known */
 105         for (i=0; i<CFG_MAX_FLASH_BANKS; ++i) {
 106                 flash_info[i].flash_id = FLASH_UNKNOWN;
 107                 flash_info[i].sector_count = 0;
 108                 flash_info[i].size = 0;
 109         }
 110
 111         DEBUGF("\n## Get flash size @ 0x%08x\n", CFG_FLASH_BASE);
 112
 113         flash_size = flash_get_size (CFG_FLASH_BASE, flash_info);
 114
 115         DEBUGF("## Flash bank size: %08lx\n", flash_size);
 116
 117         if (flash_size) {
 118 #if CFG_MONITOR_BASE >= CFG_FLASH_BASE && \
 119     CFG_MONITOR_BASE < CFG_FLASH_BASE + CFG_FLASH_MAX_SIZE
 120                 /* monitor protection ON by default */
 121                 flash_protect(FLAG_PROTECT_SET,
 122                               CFG_MONITOR_BASE,
 123                               CFG_MONITOR_BASE + monitor_flash_len - 1,
 124                               &flash_info[0]);
 125 #endif
 126
 127 #ifdef CFG_ENV_IS_IN_FLASH
 128                 /* ENV protection ON by default */
 129                 flash_protect(FLAG_PROTECT_SET,
 130                               CFG_ENV_ADDR,
 131                               CFG_ENV_ADDR + CFG_ENV_SECT_SIZE - 1,
 132                               &flash_info[0]);
 133 #endif
 134
 135         } else {
 136                 puts ("Warning: the BOOT Flash is not initialised !");
 137         }
 138
 139         flash_to_mem();
 140
 141         return flash_size;
 142 }
 143
 144 /*
 145  * The following code cannot be run from FLASH!
 146  */
 147 static ulong flash_get_size (ulong addr, flash_info_t *info)
 148 {
 149         short i;
 150         uchar value;
 151         uchar *x = (uchar *)addr;
 152
 153         flash_to_xd();
 154
 155         /* Write auto select command: read Manufacturer ID */
 156         x[0x0555] =  0xAA;
 157         __asm volatile ("sync\n eieio");
 158         x[0x02AA] =  0x55;
 159         __asm volatile ("sync\n eieio");
 160         x[0x0555] =  0x90;
 161         __asm volatile ("sync\n eieio");
 162
 163         value = x[0];
 164         __asm volatile ("sync\n eieio");
 165
 166         DEBUGF("Manuf. ID @ 0x%08lx: 0x%08x\n", (ulong)addr, value);
 167
 168         switch (value | (value << 16)) {
 169                 case AMD_MANUFACT:
 170                         info->flash_id = FLASH_MAN_AMD;
 171                         break;
 172
 173                 case FUJ_MANUFACT:
 174                         info->flash_id = FLASH_MAN_FUJ;
 175                         break;
 176
 177                 case STM_MANUFACT:
 178                         info->flash_id = FLASH_MAN_STM;
 179                         break;
 180
 181                 default:
 182                         info->flash_id = FLASH_UNKNOWN;
 183                         info->sector_count = 0;
 184                         info->size = 0;
 185                         flash_reset (addr);
 186                         return 0;
 187         }
 188
 189         value = x[1];
 190         __asm volatile ("sync\n eieio");
 191
 192         DEBUGF("Device ID @ 0x%08lx: 0x%08x\n", addr+1, value);
 193
 194         switch (value) {
 195                 case AMD_ID_F040B:
 196                         DEBUGF("Am29F040B\n");
 197                         info->flash_id += FLASH_AM040;
 198                         info->sector_count = 8;
 199                         info->size = 0x00080000;
 200                         break;                  /* => 512 kB            */
 201
 202                 case AMD_ID_LV040B:
 203                         DEBUGF("Am29LV040B\n");
 204                         info->flash_id += FLASH_AM040;
 205                         info->sector_count = 8;
 206                         info->size = 0x00080000;
 207                         break;                  /* => 512 kB            */
 208
 209                 case AMD_ID_LV400T:
 210                         DEBUGF("Am29LV400T\n");
 211                         info->flash_id += FLASH_AM400T;
 212                         info->sector_count = 11;
 213                         info->size = 0x00100000;
 214                         break;                  /* => 1 MB              */
 215
 216                 case AMD_ID_LV400B:
 217                         DEBUGF("Am29LV400B\n");
 218                         info->flash_id += FLASH_AM400B;
 219                         info->sector_count = 11;
 220                         info->size = 0x00100000;
 221                         break;                  /* => 1 MB              */
 222
 223                 case AMD_ID_LV800T:
 224                         DEBUGF("Am29LV800T\n");
 225                         info->flash_id += FLASH_AM800T;
 226                         info->sector_count = 19;
 227                         info->size = 0x00200000;
 228                         break;                  /* => 2 MB              */
 229
 230                 case AMD_ID_LV800B:
 231                         DEBUGF("Am29LV400B\n");
 232                         info->flash_id += FLASH_AM800B;
 233                         info->sector_count = 19;
 234                         info->size = 0x00200000;
 235                         break;                  /* => 2 MB              */
 236
 237                 case AMD_ID_LV160T:
 238                         DEBUGF("Am29LV160T\n");
 239                         info->flash_id += FLASH_AM160T;
 240                         info->sector_count = 35;
 241                         info->size = 0x00400000;
 242                         break;                  /* => 4 MB              */
 243
 244                 case AMD_ID_LV160B:
 245                         DEBUGF("Am29LV160B\n");
 246                         info->flash_id += FLASH_AM160B;
 247                         info->sector_count = 35;
 248                         info->size = 0x00400000;
 249                         break;                  /* => 4 MB              */
 250
 251                 case AMD_ID_LV320T:
 252                         DEBUGF("Am29LV320T\n");
 253                         info->flash_id += FLASH_AM320T;
 254                         info->sector_count = 67;
 255                         info->size = 0x00800000;
 256                         break;                  /* => 8 MB              */
 257
 258 #if 0
 259                 /* Has the same ID as AMD_ID_LV320T, to be fixed */
 260                 case AMD_ID_LV320B:
 261                         DEBUGF("Am29LV320B\n");
 262                         info->flash_id += FLASH_AM320B;
 263                         info->sector_count = 67;
 264                         info->size = 0x00800000;
 265                         break;                  /* => 8 MB              */
 266 #endif
 267
 268                 case AMD_ID_LV033C:
 269                         DEBUGF("Am29LV033C\n");
 270                         info->flash_id += FLASH_AM033C;
 271                         info->sector_count = 64;
 272                         info->size = 0x01000000;
 273                         break;                  /* => 16Mb              */
 274
 275                 case STM_ID_F040B:
 276                         DEBUGF("M29F040B\n");
 277                         info->flash_id += FLASH_AM040;
 278                         info->sector_count = 8;
 279                         info->size = 0x00080000;
 280                         break;                  /* => 512 kB            */
 281
 282                 default:
 283                         info->flash_id = FLASH_UNKNOWN;
 284                         flash_reset (addr);
 285                         flash_to_mem();
 286                         return (0);             /* => no or unknown flash */
 287
 288         }
 289
 290         if (info->sector_count > CFG_MAX_FLASH_SECT) {
 291                 printf ("** ERROR: sector count %d > max (%d) **\n",
 292                         info->sector_count, CFG_MAX_FLASH_SECT);
 293                 info->sector_count = CFG_MAX_FLASH_SECT;
 294         }
 295
 296         if (! flash_get_offsets (addr, info)) {
 297                 flash_reset (addr);
 298                 flash_to_mem();
 299                 return 0;
 300         }
 301
 302         /* check for protected sectors */
 303         for (i = 0; i < info->sector_count; i++) {
 304                 /* read sector protection at sector address, (A7 .. A0) = 0x02 */
 305                 /* D0 = 1 if protected */
 306                 value = in8(info->start[i] + 2);
 307                 iobarrier_rw();
 308                 info->protect[i] = (value & 1) != 0;
 309         }
 310
 311         /*
 312          * Reset bank to read mode
 313          */
 314         flash_reset (addr);
 315
 316         flash_to_mem();
 317
 318         return (info->size);
 319 }
 320
 321 static int flash_get_offsets (ulong base, flash_info_t *info)
 322 {
 323         unsigned int i;
 324
 325         switch (info->flash_id & FLASH_TYPEMASK) {
 326                 case FLASH_AM040:
 327                         /* set sector offsets for uniform sector type   */
 328                         for (i = 0; i < info->sector_count; i++) {
 329                                 info->start[i] = base + i * info->size /
 330                                                             info->sector_count;
 331                         }
 332                         break;
 333                 default:
 334                         return 0;
 335         }
 336
 337         return 1;
 338 }
 339
 340 int flash_erase (flash_info_t *info, int s_first, int s_last)
 341 {
 342         volatile ulong addr = info->start[0];
 343         int flag, prot, sect, l_sect;
 344         ulong start, now, last;
 345
 346         flash_to_xd();
 347
 348         if (s_first < 0 || s_first > s_last) {
 349                 if (info->flash_id == FLASH_UNKNOWN) {
 350                         printf ("- missing\n");
 351                 } else {
 352                         printf ("- no sectors to erase\n");
 353                 }
 354                 flash_to_mem();
 355                 return 1;
 356         }
 357
 358         if (info->flash_id == FLASH_UNKNOWN) {
 359                 printf ("Can't erase unknown flash type %08lx - aborted\n",
 360                         info->flash_id);
 361                 flash_to_mem();
 362                 return 1;
 363         }
 364
 365         prot = 0;
 366         for (sect=s_first; sect<=s_last; ++sect) {
 367                 if (info->protect[sect]) {
 368                         prot++;
 369                 }
 370         }
 371
 372         if (prot) {
 373                 printf ("- Warning: %d protected sectors will not be erased!\n",
 374                         prot);
 375         } else {
 376                 printf ("\n");
 377         }
 378
 379         l_sect = -1;
 380
 381         /* Disable interrupts which might cause a timeout here */
 382         flag = disable_interrupts();
 383
 384         out8(addr + 0x555, 0xAA);
 385         iobarrier_rw();
 386         out8(addr + 0x2AA, 0x55);
 387         iobarrier_rw();
 388         out8(addr + 0x555, 0x80);
 389         iobarrier_rw();
 390         out8(addr + 0x555, 0xAA);
 391         iobarrier_rw();
 392         out8(addr + 0x2AA, 0x55);
 393         iobarrier_rw();
 394
 395         /* Start erase on unprotected sectors */
 396         for (sect = s_first; sect<=s_last; sect++) {
 397                 if (info->protect[sect] == 0) { /* not protected */
 398                         addr = info->start[sect];
 399                         out8(addr, 0x30);
 400                         iobarrier_rw();
 401                         l_sect = sect;
 402                 }
 403         }
 404
 405         /* re-enable interrupts if necessary */
 406         if (flag)
 407                 enable_interrupts();
 408
 409         /* wait at least 80us - let's wait 1 ms */
 410         udelay (1000);
 411
 412         /*
 413          * We wait for the last triggered sector
 414          */
 415         if (l_sect < 0)
 416                 goto DONE;
 417
 418         start = get_timer (0);
 419         last  = start;
 420         addr = info->start[l_sect];
 421
 422         DEBUGF ("Start erase timeout: %d\n", CFG_FLASH_ERASE_TOUT);
 423
 424         while ((in8(addr) & 0x80) != 0x80) {
 425                 if ((now = get_timer(start)) > CFG_FLASH_ERASE_TOUT) {
 426                         printf ("Timeout\n");
 427                         flash_reset (info->start[0]);
 428                         flash_to_mem();
 429                         return 1;
 430                 }
 431                 /* show that we're waiting */
 432                 if ((now - last) > 1000) {      /* every second */
 433                         putc ('.');
 434                         last = now;
 435                 }
 436                 iobarrier_rw();
 437         }
 438
 439 DONE:
 440         /* reset to read mode */
 441         flash_reset (info->start[0]);
 442         flash_to_mem();
 443
 444         printf (" done\n");
 445         return 0;
 446 }
 447
 448 /*
 449  * Copy memory to flash, returns:
 450  * 0 - OK
 451  * 1 - write timeout
 452  * 2 - Flash not erased
 453  */
 454 int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt)
 455 {
 456         ulong cp, wp, data;
 457         int i, l, rc;
 458
 459         flash_to_xd();
 460
 461         wp = (addr & ~3);       /* get lower word aligned address */
 462
 463         /*
 464          * handle unaligned start bytes
 465          */
 466         if ((l = addr - wp) != 0) {
 467                 data = 0;
 468                 for (i=0, cp=wp; i<l; ++i, ++cp) {
 469                         data = (data << 8) | (*(uchar *)cp);
 470                 }
 471                 for (; i<4 && cnt>0; ++i) {
 472                         data = (data << 8) | *src++;
 473                         --cnt;
 474                         ++cp;
 475                 }
 476                 for (; cnt==0 && i<4; ++i, ++cp) {
 477                         data = (data << 8) | (*(uchar *)cp);
 478                 }
 479
 480                 if ((rc = write_word(info, wp, data)) != 0) {
 481                         flash_to_mem();
 482                         return (rc);
 483                 }
 484                 wp += 4;
 485         }
 486
 487         /*
 488          * handle word aligned part
 489          */
 490         while (cnt >= 4) {
 491                 data = 0;
 492                 for (i=0; i<4; ++i) {
 493                         data = (data << 8) | *src++;
 494                 }
 495                 if ((rc = write_word(info, wp, data)) != 0) {
 496                         flash_to_mem();
 497                         return (rc);
 498                 }
 499                 wp  += 4;
 500                 cnt -= 4;
 501         }
 502
 503         if (cnt == 0) {
 504                 flash_to_mem();
 505                 return (0);
 506         }
 507
 508         /*
 509          * handle unaligned tail bytes
 510          */
 511         data = 0;
 512         for (i=0, cp=wp; i<4 && cnt>0; ++i, ++cp) {
 513                 data = (data << 8) | *src++;
 514                 --cnt;
 515         }
 516         for (; i<4; ++i, ++cp) {
 517                 data = (data << 8) | (*(uchar *)cp);
 518         }
 519
 520
 521         flash_to_mem();
 522         return (write_word(info, wp, data));
 523 }
 524
 525 /*
 526  * Write a word to Flash, returns:
 527  * 0 - OK
 528  * 1 - write timeout
 529  * 2 - Flash not erased
 530  */
 531 static int write_word (flash_info_t *info, ulong dest, ulong data)
 532 {
 533         volatile ulong addr = info->start[0];
 534         ulong start;
 535         int i;
 536
 537         flash_to_xd();
 538
 539         /* Check if Flash is (sufficiently) erased */
 540         if ((in32(dest) & data) != data) {
 541                 flash_to_mem();
 542                 return (2);
 543         }
 544
 545         /* write each byte out */
 546         for (i = 0; i < 4; i++) {
 547                 char *data_ch = (char *)&data;
 548                 int flag = disable_interrupts();
 549
 550                 out8(addr + 0x555, 0xAA);
 551                 iobarrier_rw();
 552                 out8(addr + 0x2AA, 0x55);
 553                 iobarrier_rw();
 554                 out8(addr + 0x555, 0xA0);
 555                 iobarrier_rw();
 556                 out8(dest+i, data_ch[i]);
 557                 iobarrier_rw();
 558
 559                 /* re-enable interrupts if necessary */
 560                 if (flag)
 561                         enable_interrupts();
 562
 563                 /* data polling for D7 */
 564                 start = get_timer (0);
 565                 while ((in8(dest+i) & 0x80) != (data_ch[i] & 0x80)) {
 566                         if (get_timer(start) > CFG_FLASH_WRITE_TOUT) {
 567                                 flash_reset (addr);
 568                                 flash_to_mem();
 569                                 return (1);
 570                         }
 571                         iobarrier_rw();
 572                 }
 573         }
 574
 575         flash_reset (addr);
 576         flash_to_mem();
 577         return (0);
 578 }
 579
 580 /*
 581  * Reset bank to read mode
 582  */
 583 static void flash_reset (ulong addr)
 584 {
 585         flash_to_xd();
 586         out8(addr, 0xF0);       /* reset bank */
 587         iobarrier_rw();
 588         flash_to_mem();
 589 }
 590
 591 void flash_print_info (flash_info_t *info)
 592 {
 593         int i;
 594
 595         if (info->flash_id == FLASH_UNKNOWN) {
 596                 printf ("missing or unknown FLASH type\n");
 597                 return;
 598         }
 599
 600         switch (info->flash_id & FLASH_VENDMASK) {
 601         case FLASH_MAN_AMD:     printf ("AMD ");                break;
 602         case FLASH_MAN_FUJ:     printf ("FUJITSU ");            break;
 603         case FLASH_MAN_BM:      printf ("BRIGHT MICRO ");       break;
 604         case FLASH_MAN_STM:     printf ("SGS THOMSON ");        break;
 605         default:                printf ("Unknown Vendor ");     break;
 606         }
 607
 608         switch (info->flash_id & FLASH_TYPEMASK) {
 609         case FLASH_AM040:       printf ("29F040 or 29LV040 (4 Mbit, uniform sectors)\n");
 610                                 break;
 611         case FLASH_AM400B:      printf ("AM29LV400B (4 Mbit, bottom boot sect)\n");
 612                                 break;
 613         case FLASH_AM400T:      printf ("AM29LV400T (4 Mbit, top boot sector)\n");
 614                                 break;
 615         case FLASH_AM800B:      printf ("AM29LV800B (8 Mbit, bottom boot sect)\n");
 616                                 break;
 617         case FLASH_AM800T:      printf ("AM29LV800T (8 Mbit, top boot sector)\n");
 618                                 break;
 619         case FLASH_AM160B:      printf ("AM29LV160B (16 Mbit, bottom boot sect)\n");
 620                                 break;
 621         case FLASH_AM160T:      printf ("AM29LV160T (16 Mbit, top boot sector)\n");
 622                                 break;
 623         case FLASH_AM320B:      printf ("AM29LV320B (32 Mbit, bottom boot sect)\n");
 624                                 break;
 625         case FLASH_AM320T:      printf ("AM29LV320T (32 Mbit, top boot sector)\n");
 626                                 break;
 627         default:                printf ("Unknown Chip Type\n");
 628                                 break;
 629         }
 630
 631         if (info->size % 0x100000 == 0) {
 632                 printf ("  Size: %ld MB in %d Sectors\n",
 633                         info->size / 0x100000, info->sector_count);
 634         } else if (info->size % 0x400 == 0) {
 635                 printf ("  Size: %ld KB in %d Sectors\n",
 636                         info->size / 0x400, info->sector_count);
 637         } else {
 638                 printf ("  Size: %ld B in %d Sectors\n",
 639                         info->size, info->sector_count);
 640         }
 641
 642         printf ("  Sector Start Addresses:");
 643         for (i=0; i<info->sector_count; ++i) {
 644                 if ((i % 5) == 0)
 645                         printf ("\n   ");
 646                 printf (" %08lX%s",
 647                         info->start[i],
 648                         info->protect[i] ? " (RO)" : "     "
 649                 );
 650         }
 651         printf ("\n");
 652 }