LXR uboot/board/hidden_dragon/flash.c

   1/*
   2 * (C) Copyright 2004
   3 * Yusdi Santoso, Adaptec Inc., yusdi_santoso@adaptec.com
   4 *
   5 * (C) Copyright 2000-2005
   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 <mpc824x.h>
  29#include <asm/processor.h>
  30#include <asm/pci_io.h>
  31#include <w83c553f.h>
  32
  33#define ROM_CS0_START   0xFF800000
  34#define ROM_CS1_START   0xFF000000
  35
  36flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS]; /* info for FLASH chips    */
  37
  38#if defined(CONFIG_ENV_IS_IN_FLASH)
  39# ifndef  CONFIG_ENV_ADDR
  40#  define CONFIG_ENV_ADDR  (CONFIG_SYS_FLASH_BASE + CONFIG_ENV_OFFSET)
  41# endif
  42# ifndef  CONFIG_ENV_SIZE
  43#  define CONFIG_ENV_SIZE  CONFIG_ENV_SECT_SIZE
  44# endif
  45# ifndef  CONFIG_ENV_SECT_SIZE
  46#  define CONFIG_ENV_SECT_SIZE  CONFIG_ENV_SIZE
  47# endif
  48#endif
  49
  50/*-----------------------------------------------------------------------
  51 * Functions
  52 */
  53static int write_word (flash_info_t *info, ulong dest, ulong data);
  54
  55/*flash command address offsets*/
  56
  57#define ADDR0           (0xAAA)
  58#define ADDR1           (0x555)
  59#define ADDR3           (0x001)
  60
  61#define FLASH_WORD_SIZE unsigned char
  62
  63/*-----------------------------------------------------------------------
  64 */
  65
  66static unsigned long flash_id (unsigned char mfct, unsigned char chip)
  67        __attribute__ ((const));
  68
  69typedef struct {
  70        FLASH_WORD_SIZE extval;
  71        unsigned short intval;
  72} map_entry;
  73
  74static unsigned long flash_id (unsigned char mfct, unsigned char chip)
  75{
  76        static const map_entry mfct_map[] = {
  77                {(FLASH_WORD_SIZE) AMD_MANUFACT,
  78                 (unsigned short) ((unsigned long) FLASH_MAN_AMD >> 16)},
  79                {(FLASH_WORD_SIZE) FUJ_MANUFACT,
  80                 (unsigned short) ((unsigned long) FLASH_MAN_FUJ >> 16)},
  81                {(FLASH_WORD_SIZE) STM_MANUFACT,
  82                 (unsigned short) ((unsigned long) FLASH_MAN_STM >> 16)},
  83                {(FLASH_WORD_SIZE) MT_MANUFACT,
  84                 (unsigned short) ((unsigned long) FLASH_MAN_MT >> 16)},
  85                {(FLASH_WORD_SIZE) INTEL_MANUFACT,
  86                 (unsigned short) ((unsigned long) FLASH_MAN_INTEL >> 16)},
  87                {(FLASH_WORD_SIZE) INTEL_ALT_MANU,
  88                 (unsigned short) ((unsigned long) FLASH_MAN_INTEL >> 16)}
  89        };
  90
  91        static const map_entry chip_map[] = {
  92                {AMD_ID_F040B, FLASH_AM040},
  93                {(FLASH_WORD_SIZE) STM_ID_x800AB, FLASH_STM800AB}
  94        };
  95
  96        const map_entry *p;
  97        unsigned long result = FLASH_UNKNOWN;
  98
  99        /* find chip id */
 100        for (p = &chip_map[0];
 101             p < &chip_map[sizeof chip_map / sizeof chip_map[0]]; p++)
 102                if (p->extval == chip) {
 103                        result = FLASH_VENDMASK | p->intval;
 104                        break;
 105                }
 106
 107        /* find vendor id */
 108        for (p = &mfct_map[0];
 109             p < &mfct_map[sizeof mfct_map / sizeof mfct_map[0]]; p++)
 110                if (p->extval == mfct) {
 111                        result &= ~FLASH_VENDMASK;
 112                        result |= (unsigned long) p->intval << 16;
 113                        break;
 114                }
 115
 116        return result;
 117}
 118
 119unsigned long flash_init (void)
 120{
 121        unsigned long i;
 122        unsigned char j;
 123        static const ulong flash_banks[] = CONFIG_SYS_FLASH_BANKS;
 124
 125        /* Init: no FLASHes known */
 126        for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; i++) {
 127                flash_info_t *const pflinfo = &flash_info[i];
 128
 129                pflinfo->flash_id = FLASH_UNKNOWN;
 130                pflinfo->size = 0;
 131                pflinfo->sector_count = 0;
 132        }
 133
 134        /* Enable writes to Hidden Dragon flash */
 135        {
 136                register unsigned char temp;
 137
 138                CONFIG_READ_BYTE (CONFIG_SYS_WINBOND_ISA_CFG_ADDR + WINBOND_CSCR,
 139                                  temp);
 140                temp &= ~0x20;  /* clear BIOSWP bit */
 141                CONFIG_WRITE_BYTE (CONFIG_SYS_WINBOND_ISA_CFG_ADDR + WINBOND_CSCR,
 142                                   temp);
 143        }
 144
 145        for (i = 0; i < sizeof flash_banks / sizeof flash_banks[0]; i++) {
 146                flash_info_t *const pflinfo = &flash_info[i];
 147                const unsigned long base_address = flash_banks[i];
 148                volatile FLASH_WORD_SIZE *const flash =
 149                        (FLASH_WORD_SIZE *) base_address;
 150
 151                flash[0xAAA << (3 * i)] = 0xaa;
 152                flash[0x555 << (3 * i)] = 0x55;
 153                flash[0xAAA << (3 * i)] = 0x90;
 154                __asm__ __volatile__ ("sync");
 155
 156                pflinfo->flash_id =
 157                        flash_id (flash[0x0], flash[0x2 + 14 * i]);
 158
 159                switch (pflinfo->flash_id & FLASH_TYPEMASK) {
 160                case FLASH_AM040:
 161                        pflinfo->size = 0x00080000;
 162                        pflinfo->sector_count = 8;
 163                        for (j = 0; j < 8; j++) {
 164                                pflinfo->start[j] =
 165                                        base_address + 0x00010000 * j;
 166                                pflinfo->protect[j] = flash[(j << 16) | 0x2];
 167                        }
 168                        break;
 169                case FLASH_STM800AB:
 170                        pflinfo->size = 0x00100000;
 171                        pflinfo->sector_count = 19;
 172                        pflinfo->start[0] = base_address;
 173                        pflinfo->start[1] = base_address + 0x4000;
 174                        pflinfo->start[2] = base_address + 0x6000;
 175                        pflinfo->start[3] = base_address + 0x8000;
 176                        for (j = 1; j < 16; j++) {
 177                                pflinfo->start[j + 3] =
 178                                        base_address + 0x00010000 * j;
 179                        }
 180                        break;
 181                default:
 182                        /* The chip used is not listed in flash_id
 183                           TODO: Change this to explicitly detect the flash type
 184                         */
 185                        {
 186                                int sector_addr = base_address;
 187
 188                                pflinfo->size = 0x00200000;
 189                                pflinfo->sector_count = 35;
 190                                pflinfo->start[0] = sector_addr;
 191                                sector_addr += 0x4000;  /* 16K */
 192                                pflinfo->start[1] = sector_addr;
 193                                sector_addr += 0x2000;  /* 8K */
 194                                pflinfo->start[2] = sector_addr;
 195                                sector_addr += 0x2000;  /* 8K */
 196                                pflinfo->start[3] = sector_addr;
 197                                sector_addr += 0x8000;  /* 32K */
 198
 199                                for (j = 4; j < 35; j++) {
 200                                        pflinfo->start[j] = sector_addr;
 201                                        sector_addr += 0x10000; /* 64K */
 202                                }
 203                        }
 204                        break;
 205                }
 206                /* Protect monitor and environment sectors
 207                 */
 208#if CONFIG_SYS_MONITOR_BASE >= CONFIG_SYS_FLASH_BASE
 209                flash_protect (FLAG_PROTECT_SET,
 210                               CONFIG_SYS_MONITOR_BASE,
 211                               CONFIG_SYS_MONITOR_BASE + monitor_flash_len - 1,
 212                               &flash_info[0]);
 213#endif
 214
 215#if defined(CONFIG_ENV_IS_IN_FLASH) && defined(CONFIG_ENV_ADDR)
 216                flash_protect (FLAG_PROTECT_SET,
 217                               CONFIG_ENV_ADDR,
 218                               CONFIG_ENV_ADDR + CONFIG_ENV_SIZE - 1,
 219                               &flash_info[0]);
 220#endif
 221
 222                /* reset device to read mode */
 223                flash[0x0000] = 0xf0;
 224                __asm__ __volatile__ ("sync");
 225        }
 226
 227        /* only have 1 bank */
 228        return flash_info[0].size;
 229}
 230
 231/*-----------------------------------------------------------------------
 232 */
 233void flash_print_info (flash_info_t * info)
 234{
 235        static const char unk[] = "Unknown";
 236        const char *mfct = unk, *type = unk;
 237        unsigned int i;
 238
 239        if (info->flash_id != FLASH_UNKNOWN) {
 240                switch (info->flash_id & FLASH_VENDMASK) {
 241                case FLASH_MAN_AMD:
 242                        mfct = "AMD";
 243                        break;
 244                case FLASH_MAN_FUJ:
 245                        mfct = "FUJITSU";
 246                        break;
 247                case FLASH_MAN_STM:
 248                        mfct = "STM";
 249                        break;
 250                case FLASH_MAN_SST:
 251                        mfct = "SST";
 252                        break;
 253                case FLASH_MAN_BM:
 254                        mfct = "Bright Microelectonics";
 255                        break;
 256                case FLASH_MAN_INTEL:
 257                        mfct = "Intel";
 258                        break;
 259                }
 260
 261                switch (info->flash_id & FLASH_TYPEMASK) {
 262                case FLASH_AM040:
 263                        type = "AM29F040B (512K * 8, uniform sector size)";
 264                        break;
 265                case FLASH_AM400B:
 266                        type = "AM29LV400B (4 Mbit, bottom boot sect)";
 267                        break;
 268                case FLASH_AM400T:
 269                        type = "AM29LV400T (4 Mbit, top boot sector)";
 270                        break;
 271                case FLASH_AM800B:
 272                        type = "AM29LV800B (8 Mbit, bottom boot sect)";
 273                        break;
 274                case FLASH_AM800T:
 275                        type = "AM29LV800T (8 Mbit, top boot sector)";
 276                        break;
 277                case FLASH_AM160T:
 278                        type = "AM29LV160T (16 Mbit, top boot sector)";
 279                        break;
 280                case FLASH_AM320B:
 281                        type = "AM29LV320B (32 Mbit, bottom boot sect)";
 282                        break;
 283                case FLASH_AM320T:
 284                        type = "AM29LV320T (32 Mbit, top boot sector)";
 285                        break;
 286                case FLASH_STM800AB:
 287                        type = "M29W800AB (8 Mbit, bottom boot sect)";
 288                        break;
 289                case FLASH_SST800A:
 290                        type = "SST39LF/VF800 (8 Mbit, uniform sector size)";
 291                        break;
 292                case FLASH_SST160A:
 293                        type = "SST39LF/VF160 (16 Mbit, uniform sector size)";
 294                        break;
 295                }
 296        }
 297
 298        printf ("\n  Brand: %s Type: %s\n"
 299                "  Size: %lu KB in %d Sectors\n",
 300                mfct, type, info->size >> 10, info->sector_count);
 301
 302        printf ("  Sector Start Addresses:");
 303
 304        for (i = 0; i < info->sector_count; i++) {
 305                unsigned long size;
 306                unsigned int erased;
 307                unsigned long *flash = (unsigned long *) info->start[i];
 308
 309                /*
 310                 * Check if whole sector is erased
 311                 */
 312                size = (i != (info->sector_count - 1)) ?
 313                        (info->start[i + 1] - info->start[i]) >> 2 :
 314                        (info->start[0] + info->size - info->start[i]) >> 2;
 315
 316                for (flash = (unsigned long *) info->start[i], erased = 1;
 317                     (flash != (unsigned long *) info->start[i] + size)
 318                     && erased; flash++)
 319                        erased = *flash == ~0x0UL;
 320
 321                printf ("%s %08lX %s %s",
 322                        (i % 5) ? "" : "\n   ",
 323                        info->start[i],
 324                        erased ? "E" : " ", info->protect[i] ? "RO" : "  ");
 325        }
 326
 327        puts ("\n");
 328        return;
 329}
 330
 331int flash_erase (flash_info_t * info, int s_first, int s_last)
 332{
 333        volatile FLASH_WORD_SIZE *addr = (FLASH_WORD_SIZE *) (info->start[0]);
 334        int flag, prot, sect, l_sect;
 335        ulong start, now, last;
 336        unsigned char sh8b;
 337
 338        if ((s_first < 0) || (s_first > s_last)) {
 339                if (info->flash_id == FLASH_UNKNOWN) {
 340                        printf ("- missing\n");
 341                } else {
 342                        printf ("- no sectors to erase\n");
 343                }
 344                return 1;
 345        }
 346
 347        if ((info->flash_id == FLASH_UNKNOWN) ||
 348            (info->flash_id > (FLASH_MAN_STM | FLASH_AMD_COMP))) {
 349                printf ("Can't erase unknown flash type - aborted\n");
 350                return 1;
 351        }
 352
 353        prot = 0;
 354        for (sect = s_first; sect <= s_last; ++sect) {
 355                if (info->protect[sect]) {
 356                        prot++;
 357                }
 358        }
 359
 360        if (prot) {
 361                printf ("- Warning: %d protected sectors will not be erased!\n", prot);
 362        } else {
 363                printf ("\n");
 364        }
 365
 366        l_sect = -1;
 367
 368        /* Check the ROM CS */
 369        if ((info->start[0] >= ROM_CS1_START)
 370            && (info->start[0] < ROM_CS0_START))
 371                sh8b = 3;
 372        else
 373                sh8b = 0;
 374
 375        /* Disable interrupts which might cause a timeout here */
 376        flag = disable_interrupts ();
 377
 378        addr[ADDR0 << sh8b] = (FLASH_WORD_SIZE) 0x00AA00AA;
 379        addr[ADDR1 << sh8b] = (FLASH_WORD_SIZE) 0x00550055;
 380        addr[ADDR0 << sh8b] = (FLASH_WORD_SIZE) 0x00800080;
 381        addr[ADDR0 << sh8b] = (FLASH_WORD_SIZE) 0x00AA00AA;
 382        addr[ADDR1 << sh8b] = (FLASH_WORD_SIZE) 0x00550055;
 383
 384        /* Start erase on unprotected sectors */
 385        for (sect = s_first; sect <= s_last; sect++) {
 386                if (info->protect[sect] == 0) { /* not protected */
 387                        addr = (FLASH_WORD_SIZE *) (info->start[0] +
 388                                                    ((info->start[sect] -
 389                                                      info->start[0]) << sh8b));
 390                        if (info->flash_id & FLASH_MAN_SST) {
 391                                addr[ADDR0 << sh8b] =
 392                                        (FLASH_WORD_SIZE) 0x00AA00AA;
 393                                addr[ADDR1 << sh8b] =
 394                                        (FLASH_WORD_SIZE) 0x00550055;
 395                                addr[ADDR0 << sh8b] =
 396                                        (FLASH_WORD_SIZE) 0x00800080;
 397                                addr[ADDR0 << sh8b] =
 398                                        (FLASH_WORD_SIZE) 0x00AA00AA;
 399                                addr[ADDR1 << sh8b] =
 400                                        (FLASH_WORD_SIZE) 0x00550055;
 401                                addr[0] = (FLASH_WORD_SIZE) 0x00500050; /* block erase */
 402                                udelay (30000); /* wait 30 ms */
 403                        } else
 404                                addr[0] = (FLASH_WORD_SIZE) 0x00300030; /* sector erase */
 405                        l_sect = sect;
 406                }
 407        }
 408
 409        /* re-enable interrupts if necessary */
 410        if (flag)
 411                enable_interrupts ();
 412
 413        /* wait at least 80us - let's wait 1 ms */
 414        udelay (1000);
 415
 416        /*
 417         * We wait for the last triggered sector
 418         */
 419        if (l_sect < 0)
 420                goto DONE;
 421
 422        start = get_timer (0);
 423        last = start;
 424        addr = (FLASH_WORD_SIZE *) (info->start[0] + ((info->start[l_sect] -
 425                                                       info->
 426                                                       start[0]) << sh8b));
 427        while ((addr[0] & (FLASH_WORD_SIZE) 0x00800080) !=
 428               (FLASH_WORD_SIZE) 0x00800080) {
 429                if ((now = get_timer (start)) > CONFIG_SYS_FLASH_ERASE_TOUT) {
 430                        printf ("Timeout\n");
 431                        return 1;
 432                }
 433                /* show that we're waiting */
 434                if ((now - last) > 1000) {      /* every second */
 435                        serial_putc ('.');
 436                        last = now;
 437                }
 438        }
 439
 440      DONE:
 441        /* reset to read mode */
 442        addr = (FLASH_WORD_SIZE *) info->start[0];
 443        addr[0] = (FLASH_WORD_SIZE) 0x00F000F0; /* reset bank */
 444
 445        printf (" done\n");
 446        return 0;
 447}
 448
 449/*-----------------------------------------------------------------------
 450 * Copy memory to flash, returns:
 451 * 0 - OK
 452 * 1 - write timeout
 453 * 2 - Flash not erased
 454 */
 455
 456int write_buff (flash_info_t * info, uchar * src, ulong addr, ulong cnt)
 457{
 458        ulong cp, wp, data;
 459        int i, l, rc;
 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                        return (rc);
 482                }
 483                wp += 4;
 484        }
 485
 486        /*
 487         * handle word aligned part
 488         */
 489        while (cnt >= 4) {
 490                data = 0;
 491                for (i = 0; i < 4; ++i) {
 492                        data = (data << 8) | *src++;
 493                }
 494                if ((rc = write_word (info, wp, data)) != 0) {
 495                        return (rc);
 496                }
 497                wp += 4;
 498                cnt -= 4;
 499        }
 500
 501        if (cnt == 0) {
 502                return (0);
 503        }
 504
 505        /*
 506         * handle unaligned tail bytes
 507         */
 508        data = 0;
 509        for (i = 0, cp = wp; i < 4 && cnt > 0; ++i, ++cp) {
 510                data = (data << 8) | *src++;
 511                --cnt;
 512        }
 513        for (; i < 4; ++i, ++cp) {
 514                data = (data << 8) | (*(uchar *) cp);
 515        }
 516
 517        return (write_word (info, wp, data));
 518}
 519
 520/*-----------------------------------------------------------------------
 521 * Write a word to Flash, returns:
 522 * 0 - OK
 523 * 1 - write timeout
 524 * 2 - Flash not erased
 525 */
 526static int write_word (flash_info_t * info, ulong dest, ulong data)
 527{
 528        volatile FLASH_WORD_SIZE *addr2 = (FLASH_WORD_SIZE *) info->start[0];
 529        volatile FLASH_WORD_SIZE *dest2;
 530        volatile FLASH_WORD_SIZE *data2 = (FLASH_WORD_SIZE *) & data;
 531        ulong start;
 532        int flag;
 533        int i;
 534        unsigned char sh8b;
 535
 536        /* Check the ROM CS */
 537        if ((info->start[0] >= ROM_CS1_START)
 538            && (info->start[0] < ROM_CS0_START))
 539                sh8b = 3;
 540        else
 541                sh8b = 0;
 542
 543        dest2 = (FLASH_WORD_SIZE *) (((dest - info->start[0]) << sh8b) +
 544                                     info->start[0]);
 545
 546        /* Check if Flash is (sufficiently) erased */
 547        if ((*dest2 & (FLASH_WORD_SIZE) data) != (FLASH_WORD_SIZE) data) {
 548                return (2);
 549        }
 550        /* Disable interrupts which might cause a timeout here */
 551        flag = disable_interrupts ();
 552
 553        for (i = 0; i < 4 / sizeof (FLASH_WORD_SIZE); i++) {
 554                addr2[ADDR0 << sh8b] = (FLASH_WORD_SIZE) 0x00AA00AA;
 555                addr2[ADDR1 << sh8b] = (FLASH_WORD_SIZE) 0x00550055;
 556                addr2[ADDR0 << sh8b] = (FLASH_WORD_SIZE) 0x00A000A0;
 557
 558                dest2[i << sh8b] = data2[i];
 559
 560                /* re-enable interrupts if necessary */
 561                if (flag)
 562                        enable_interrupts ();
 563
 564                /* data polling for D7 */
 565                start = get_timer (0);
 566                while ((dest2[i << sh8b] & (FLASH_WORD_SIZE) 0x00800080) !=
 567                       (data2[i] & (FLASH_WORD_SIZE) 0x00800080)) {
 568                        if (get_timer (start) > CONFIG_SYS_FLASH_WRITE_TOUT) {
 569                                return (1);
 570                        }
 571                }
 572        }
 573
 574        return (0);
 575}
 576