LXR uboot/board/siemens/SCM/flash.c

   1/*
   2 * (C) Copyright 2001, 2002
   3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   4 *
   5 * Flash Routines for AMD devices on the TQM8260 board
   6 *
   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 <mpc8xx.h>
  29
  30#define V_ULONG(a)      (*(volatile unsigned long *)( a ))
  31#define V_BYTE(a)       (*(volatile unsigned char *)( a ))
  32
  33
  34flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS];
  35
  36
  37/*-----------------------------------------------------------------------
  38 */
  39void flash_reset (void)
  40{
  41        if (flash_info[0].flash_id != FLASH_UNKNOWN) {
  42                V_ULONG (flash_info[0].start[0]) = 0x00F000F0;
  43                V_ULONG (flash_info[0].start[0] + 4) = 0x00F000F0;
  44        }
  45}
  46
  47/*-----------------------------------------------------------------------
  48 */
  49ulong flash_get_size (ulong baseaddr, flash_info_t * info)
  50{
  51        short i;
  52        unsigned long flashtest_h, flashtest_l;
  53
  54        /* Write auto select command sequence and test FLASH answer */
  55        V_ULONG (baseaddr + ((ulong) 0x0555 << 3)) = 0x00AA00AA;
  56        V_ULONG (baseaddr + ((ulong) 0x02AA << 3)) = 0x00550055;
  57        V_ULONG (baseaddr + ((ulong) 0x0555 << 3)) = 0x00900090;
  58        V_ULONG (baseaddr + 4 + ((ulong) 0x0555 << 3)) = 0x00AA00AA;
  59        V_ULONG (baseaddr + 4 + ((ulong) 0x02AA << 3)) = 0x00550055;
  60        V_ULONG (baseaddr + 4 + ((ulong) 0x0555 << 3)) = 0x00900090;
  61
  62        flashtest_h = V_ULONG (baseaddr);       /* manufacturer ID     */
  63        flashtest_l = V_ULONG (baseaddr + 4);
  64
  65        switch ((int) flashtest_h) {
  66        case AMD_MANUFACT:
  67                info->flash_id = FLASH_MAN_AMD;
  68                break;
  69        case FUJ_MANUFACT:
  70                info->flash_id = FLASH_MAN_FUJ;
  71                break;
  72        default:
  73                info->flash_id = FLASH_UNKNOWN;
  74                info->sector_count = 0;
  75                info->size = 0;
  76                return (0);                     /* no or unknown flash     */
  77        }
  78
  79        flashtest_h = V_ULONG (baseaddr + 8);   /* device ID           */
  80        flashtest_l = V_ULONG (baseaddr + 12);
  81        if (flashtest_h != flashtest_l) {
  82                info->flash_id = FLASH_UNKNOWN;
  83        } else {
  84                switch (flashtest_h) {
  85                case AMD_ID_LV800T:
  86                        info->flash_id += FLASH_AM800T;
  87                        info->sector_count = 19;
  88                        info->size = 0x00400000;
  89                        break;                  /* 4 * 1 MB = 4 MB  */
  90                case AMD_ID_LV800B:
  91                        info->flash_id += FLASH_AM800B;
  92                        info->sector_count = 19;
  93                        info->size = 0x00400000;
  94                        break;                  /* 4 * 1 MB = 4 MB  */
  95                case AMD_ID_LV160T:
  96                        info->flash_id += FLASH_AM160T;
  97                        info->sector_count = 35;
  98                        info->size = 0x00800000;
  99                        break;                  /* 4 * 2 MB = 8 MB  */
 100                case AMD_ID_LV160B:
 101                        info->flash_id += FLASH_AM160B;
 102                        info->sector_count = 35;
 103                        info->size = 0x00800000;
 104                        break;                  /* 4 * 2 MB = 8 MB  */
 105                case AMD_ID_DL322T:
 106                        info->flash_id += FLASH_AMDL322T;
 107                        info->sector_count = 71;
 108                        info->size = 0x01000000;
 109                        break;                  /* 4 * 4 MB = 16 MB */
 110                case AMD_ID_DL322B:
 111                        info->flash_id += FLASH_AMDL322B;
 112                        info->sector_count = 71;
 113                        info->size = 0x01000000;
 114                        break;                  /* 4 * 4 MB = 16 MB */
 115                case AMD_ID_DL323T:
 116                        info->flash_id += FLASH_AMDL323T;
 117                        info->sector_count = 71;
 118                        info->size = 0x01000000;
 119                        break;                  /* 4 * 4 MB = 16 MB */
 120                case AMD_ID_DL323B:
 121                        info->flash_id += FLASH_AMDL323B;
 122                        info->sector_count = 71;
 123                        info->size = 0x01000000;
 124                        break;                  /* 4 * 4 MB = 16 MB */
 125                case AMD_ID_LV640U:
 126                        info->flash_id += FLASH_AM640U;
 127                        info->sector_count = 128;
 128                        info->size = 0x02000000;
 129                        break;                  /* 4 * 8 MB = 32 MB */
 130                default:
 131                        info->flash_id = FLASH_UNKNOWN;
 132                        return (0);             /* no or unknown flash     */
 133                }
 134        }
 135
 136        if (flashtest_h == AMD_ID_LV640U) {
 137
 138                /* set up sector start adress table (uniform sector type) */
 139                for (i = 0; i < info->sector_count; i++)
 140                        info->start[i] = baseaddr + (i * 0x00040000);
 141
 142        } else if (info->flash_id & FLASH_BTYPE) {
 143
 144                /* set up sector start adress table (bottom sector type) */
 145                info->start[0] = baseaddr + 0x00000000;
 146                info->start[1] = baseaddr + 0x00010000;
 147                info->start[2] = baseaddr + 0x00018000;
 148                info->start[3] = baseaddr + 0x00020000;
 149                for (i = 4; i < info->sector_count; i++) {
 150                        info->start[i] = baseaddr + (i * 0x00040000) - 0x000C0000;
 151                }
 152
 153        } else {
 154
 155                /* set up sector start adress table (top sector type) */
 156                i = info->sector_count - 1;
 157                info->start[i--] = baseaddr + info->size - 0x00010000;
 158                info->start[i--] = baseaddr + info->size - 0x00018000;
 159                info->start[i--] = baseaddr + info->size - 0x00020000;
 160                for (; i >= 0; i--) {
 161                        info->start[i] = baseaddr + i * 0x00040000;
 162                }
 163        }
 164
 165        /* check for protected sectors */
 166        for (i = 0; i < info->sector_count; i++) {
 167                /* read sector protection at sector address, (A7 .. A0) = 0x02 */
 168                if ((V_ULONG (info->start[i] + 16) & 0x00010001) ||
 169                        (V_ULONG (info->start[i] + 20) & 0x00010001)) {
 170                        info->protect[i] = 1;   /* D0 = 1 if protected */
 171                } else {
 172                        info->protect[i] = 0;
 173                }
 174        }
 175
 176        flash_reset ();
 177        return (info->size);
 178}
 179
 180/*-----------------------------------------------------------------------
 181 */
 182unsigned long flash_init (void)
 183{
 184        unsigned long size_b0 = 0;
 185        int i;
 186
 187        /* Init: no FLASHes known */
 188        for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; ++i) {
 189                flash_info[i].flash_id = FLASH_UNKNOWN;
 190        }
 191
 192        /* Static FLASH Bank configuration here (only one bank) */
 193
 194        size_b0 = flash_get_size (CONFIG_SYS_FLASH0_BASE, &flash_info[0]);
 195        if (flash_info[0].flash_id == FLASH_UNKNOWN || size_b0 == 0) {
 196                printf ("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n",
 197                                size_b0, size_b0 >> 20);
 198        }
 199
 200        /*
 201         * protect monitor and environment sectors
 202         */
 203
 204#if CONFIG_SYS_MONITOR_BASE >= CONFIG_SYS_FLASH0_BASE
 205        flash_protect (FLAG_PROTECT_SET,
 206                       CONFIG_SYS_MONITOR_BASE,
 207                       CONFIG_SYS_MONITOR_BASE + monitor_flash_len - 1, &flash_info[0]);
 208#endif
 209
 210#if defined(CONFIG_ENV_IS_IN_FLASH) && defined(CONFIG_ENV_ADDR)
 211# ifndef  CONFIG_ENV_SIZE
 212#  define CONFIG_ENV_SIZE       CONFIG_ENV_SECT_SIZE
 213# endif
 214        flash_protect (FLAG_PROTECT_SET,
 215                       CONFIG_ENV_ADDR,
 216                       CONFIG_ENV_ADDR + CONFIG_ENV_SIZE - 1, &flash_info[0]);
 217#endif
 218
 219        return (size_b0);
 220}
 221
 222/*-----------------------------------------------------------------------
 223 */
 224void flash_print_info (flash_info_t * info)
 225{
 226        int i;
 227
 228        if (info->flash_id == FLASH_UNKNOWN) {
 229                printf ("missing or unknown FLASH type\n");
 230                return;
 231        }
 232
 233        switch (info->flash_id & FLASH_VENDMASK) {
 234        case FLASH_MAN_AMD:
 235                printf ("AMD ");
 236                break;
 237        case FLASH_MAN_FUJ:
 238                printf ("FUJITSU ");
 239                break;
 240        default:
 241                printf ("Unknown Vendor ");
 242                break;
 243        }
 244
 245        switch (info->flash_id & FLASH_TYPEMASK) {
 246        case FLASH_AM800T:
 247                printf ("29LV800T (8 M, top sector)\n");
 248                break;
 249        case FLASH_AM800B:
 250                printf ("29LV800T (8 M, bottom sector)\n");
 251                break;
 252        case FLASH_AM160T:
 253                printf ("29LV160T (16 M, top sector)\n");
 254                break;
 255        case FLASH_AM160B:
 256                printf ("29LV160B (16 M, bottom sector)\n");
 257                break;
 258        case FLASH_AMDL322T:
 259                printf ("29DL322T (32 M, top sector)\n");
 260                break;
 261        case FLASH_AMDL322B:
 262                printf ("29DL322B (32 M, bottom sector)\n");
 263                break;
 264        case FLASH_AMDL323T:
 265                printf ("29DL323T (32 M, top sector)\n");
 266                break;
 267        case FLASH_AMDL323B:
 268                printf ("29DL323B (32 M, bottom sector)\n");
 269                break;
 270        case FLASH_AM640U:
 271                printf ("29LV640D (64 M, uniform sector)\n");
 272                break;
 273        default:
 274                printf ("Unknown Chip Type\n");
 275                break;
 276        }
 277
 278        printf ("  Size: %ld MB in %d Sectors\n",
 279                        info->size >> 20, info->sector_count);
 280
 281        printf ("  Sector Start Addresses:");
 282        for (i = 0; i < info->sector_count; ++i) {
 283                if ((i % 5) == 0)
 284                        printf ("\n   ");
 285                printf (" %08lX%s",
 286                        info->start[i],
 287                        info->protect[i] ? " (RO)" : "     "
 288                );
 289        }
 290        printf ("\n");
 291        return;
 292}
 293
 294/*-----------------------------------------------------------------------
 295 */
 296int flash_erase (flash_info_t * info, int s_first, int s_last)
 297{
 298        int flag, prot, sect, l_sect;
 299        ulong start, now, last;
 300
 301        if ((s_first < 0) || (s_first > s_last)) {
 302                if (info->flash_id == FLASH_UNKNOWN) {
 303                        printf ("- missing\n");
 304                } else {
 305                        printf ("- no sectors to erase\n");
 306                }
 307                return 1;
 308        }
 309
 310        prot = 0;
 311        for (sect = s_first; sect <= s_last; sect++) {
 312                if (info->protect[sect])
 313                        prot++;
 314        }
 315
 316        if (prot) {
 317                printf ("- Warning: %d protected sectors will not be erased!\n",
 318                        prot);
 319        } else {
 320                printf ("\n");
 321        }
 322
 323        l_sect = -1;
 324
 325        /* Disable interrupts which might cause a timeout here */
 326        flag = disable_interrupts ();
 327
 328        V_ULONG (info->start[0] + (0x0555 << 3)) = 0x00AA00AA;
 329        V_ULONG (info->start[0] + (0x02AA << 3)) = 0x00550055;
 330        V_ULONG (info->start[0] + (0x0555 << 3)) = 0x00800080;
 331        V_ULONG (info->start[0] + (0x0555 << 3)) = 0x00AA00AA;
 332        V_ULONG (info->start[0] + (0x02AA << 3)) = 0x00550055;
 333        V_ULONG (info->start[0] + 4 + (0x0555 << 3)) = 0x00AA00AA;
 334        V_ULONG (info->start[0] + 4 + (0x02AA << 3)) = 0x00550055;
 335        V_ULONG (info->start[0] + 4 + (0x0555 << 3)) = 0x00800080;
 336        V_ULONG (info->start[0] + 4 + (0x0555 << 3)) = 0x00AA00AA;
 337        V_ULONG (info->start[0] + 4 + (0x02AA << 3)) = 0x00550055;
 338        udelay (1000);
 339
 340        /* Start erase on unprotected sectors */
 341        for (sect = s_first; sect <= s_last; sect++) {
 342                if (info->protect[sect] == 0) { /* not protected */
 343                        V_ULONG (info->start[sect]) = 0x00300030;
 344                        V_ULONG (info->start[sect] + 4) = 0x00300030;
 345                        l_sect = sect;
 346                }
 347        }
 348
 349        /* re-enable interrupts if necessary */
 350        if (flag)
 351                enable_interrupts ();
 352
 353        /* wait at least 80us - let's wait 1 ms */
 354        udelay (1000);
 355
 356        /*
 357         * We wait for the last triggered sector
 358         */
 359        if (l_sect < 0)
 360                goto DONE;
 361
 362        start = get_timer (0);
 363        last = start;
 364        while ((V_ULONG (info->start[l_sect]) & 0x00800080) != 0x00800080 ||
 365               (V_ULONG (info->start[l_sect] + 4) & 0x00800080) != 0x00800080)
 366        {
 367                if ((now = get_timer (start)) > CONFIG_SYS_FLASH_ERASE_TOUT) {
 368                        printf ("Timeout\n");
 369                        return 1;
 370                }
 371                /* show that we're waiting */
 372                if ((now - last) > 1000) {      /* every second */
 373                        serial_putc ('.');
 374                        last = now;
 375                }
 376        }
 377
 378  DONE:
 379        /* reset to read mode */
 380        flash_reset ();
 381
 382        printf (" done\n");
 383        return 0;
 384}
 385
 386static int write_dword (flash_info_t *, ulong, unsigned char *);
 387
 388/*-----------------------------------------------------------------------
 389 * Copy memory to flash, returns:
 390 * 0 - OK
 391 * 1 - write timeout
 392 * 2 - Flash not erased
 393 */
 394
 395int write_buff (flash_info_t * info, uchar * src, ulong addr, ulong cnt)
 396{
 397        ulong dp;
 398        static unsigned char bb[8];
 399        int i, l, rc, cc = cnt;
 400
 401        dp = (addr & ~7);               /* get lower dword aligned address */
 402
 403        /*
 404         * handle unaligned start bytes
 405         */
 406        if ((l = addr - dp) != 0) {
 407                for (i = 0; i < 8; i++)
 408                        bb[i] = (i < l || (i - l) >= cc) ? V_BYTE (dp + i) : *src++;
 409                if ((rc = write_dword (info, dp, bb)) != 0) {
 410                        return (rc);
 411                }
 412                dp += 8;
 413                cc -= 8 - l;
 414        }
 415
 416        /*
 417         * handle word aligned part
 418         */
 419        while (cc >= 8) {
 420                if ((rc = write_dword (info, dp, src)) != 0) {
 421                        return (rc);
 422                }
 423                dp += 8;
 424                src += 8;
 425                cc -= 8;
 426        }
 427
 428        if (cc <= 0) {
 429                return (0);
 430        }
 431
 432        /*
 433         * handle unaligned tail bytes
 434         */
 435        for (i = 0; i < 8; i++) {
 436                bb[i] = (i < cc) ? *src++ : V_BYTE (dp + i);
 437        }
 438        return (write_dword (info, dp, bb));
 439}
 440
 441/*-----------------------------------------------------------------------
 442 * Write a dword to Flash, returns:
 443 * 0 - OK
 444 * 1 - write timeout
 445 * 2 - Flash not erased
 446 */
 447static int write_dword (flash_info_t * info, ulong dest, unsigned char *pdata)
 448{
 449        ulong start, cl, ch;
 450        int flag, i;
 451
 452        for (ch = 0, i = 0; i < 4; i++)
 453                ch = (ch << 8) + *pdata++;      /* high word    */
 454        for (cl = 0, i = 0; i < 4; i++)
 455                cl = (cl << 8) + *pdata++;      /* low word */
 456
 457        /* Check if Flash is (sufficiently) erased */
 458        if ((*((vu_long *) dest) & ch) != ch
 459                || (*((vu_long *) (dest + 4)) & cl) != cl) {
 460                return (2);
 461        }
 462
 463        /* Disable interrupts which might cause a timeout here */
 464        flag = disable_interrupts ();
 465
 466        V_ULONG (info->start[0] + (0x0555 << 3)) = 0x00AA00AA;
 467        V_ULONG (info->start[0] + (0x02AA << 3)) = 0x00550055;
 468        V_ULONG (info->start[0] + (0x0555 << 3)) = 0x00A000A0;
 469        V_ULONG (dest) = ch;
 470        V_ULONG (info->start[0] + 4 + (0x0555 << 3)) = 0x00AA00AA;
 471        V_ULONG (info->start[0] + 4 + (0x02AA << 3)) = 0x00550055;
 472        V_ULONG (info->start[0] + 4 + (0x0555 << 3)) = 0x00A000A0;
 473        V_ULONG (dest + 4) = cl;
 474
 475        /* re-enable interrupts if necessary */
 476        if (flag)
 477                enable_interrupts ();
 478
 479        /* data polling for D7 */
 480        start = get_timer (0);
 481        while (((V_ULONG (dest) & 0x00800080) != (ch & 0x00800080)) ||
 482                   ((V_ULONG (dest + 4) & 0x00800080) != (cl & 0x00800080))) {
 483                if (get_timer (start) > CONFIG_SYS_FLASH_WRITE_TOUT) {
 484                        return (1);
 485                }
 486        }
 487        return (0);
 488}
 489