LXR uboot/board/ppmc7xx/flash.c

   1/*
   2 * flash.c
   3 * -------
   4 *
   5 * Flash programming routines for the Wind River PPMC 74xx/7xx
   6 * based on flash.c from the TQM8260 board.
   7 *
   8 * By Richard Danter (richard.danter@windriver.com)
   9 * Copyright (C) 2005 Wind River Systems
  10 */
  11
  12#include <common.h>
  13#include <asm/processor.h>
  14#include <74xx_7xx.h>
  15
  16#define DWORD unsigned long long
  17
  18/* Local function prototypes */
  19static int      write_dword (flash_info_t* info, ulong dest, unsigned char *pdata);
  20static void     write_via_fpu (volatile DWORD* addr, DWORD* data);
  21
  22flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS];
  23
  24/*-----------------------------------------------------------------------
  25 */
  26void flash_reset (void)
  27{
  28        unsigned long msr;
  29        DWORD cmd_reset = 0x00F000F000F000F0LL;
  30
  31        if (flash_info[0].flash_id != FLASH_UNKNOWN) {
  32                msr = get_msr ();
  33                set_msr (msr | MSR_FP);
  34
  35                write_via_fpu ((DWORD*)flash_info[0].start[0], &cmd_reset );
  36
  37                set_msr (msr);
  38        }
  39}
  40
  41/*-----------------------------------------------------------------------
  42 */
  43ulong flash_get_size (ulong baseaddr, flash_info_t * info)
  44{
  45        int i;
  46        unsigned long msr;
  47        DWORD flashtest;
  48        DWORD cmd_select[3] = { 0x00AA00AA00AA00AALL, 0x0055005500550055LL,
  49                                                        0x0090009000900090LL };
  50
  51        /* Enable FPU */
  52        msr = get_msr ();
  53        set_msr (msr | MSR_FP);
  54
  55        /* Write auto-select command sequence */
  56        write_via_fpu ((DWORD*)(baseaddr + (0x0555 << 3)), &cmd_select[0] );
  57        write_via_fpu ((DWORD*)(baseaddr + (0x02AA << 3)), &cmd_select[1] );
  58        write_via_fpu ((DWORD*)(baseaddr + (0x0555 << 3)), &cmd_select[2] );
  59
  60        /* Restore FPU */
  61        set_msr (msr);
  62
  63        /* Read manufacturer ID */
  64        flashtest = *(volatile DWORD*)baseaddr;
  65        switch ((int)flashtest) {
  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                /* No, faulty or unknown flash */
  74                info->flash_id = FLASH_UNKNOWN;
  75                info->sector_count = 0;
  76                info->size = 0;
  77                return (0);
  78        }
  79
  80        /* Read device ID */
  81        flashtest = *(volatile DWORD*)(baseaddr + 8);
  82        switch ((long)flashtest) {
  83        case AMD_ID_LV800T:
  84                info->flash_id += FLASH_AM800T;
  85                info->sector_count = 19;
  86                info->size = 0x00400000;
  87                break;
  88        case AMD_ID_LV800B:
  89                info->flash_id += FLASH_AM800B;
  90                info->sector_count = 19;
  91                info->size = 0x00400000;
  92                break;
  93        case AMD_ID_LV160T:
  94                info->flash_id += FLASH_AM160T;
  95                info->sector_count = 35;
  96                info->size = 0x00800000;
  97                break;
  98        case AMD_ID_LV160B:
  99                info->flash_id += FLASH_AM160B;
 100                info->sector_count = 35;
 101                info->size = 0x00800000;
 102                break;
 103        case AMD_ID_DL322T:
 104                info->flash_id += FLASH_AMDL322T;
 105                info->sector_count = 71;
 106                info->size = 0x01000000;
 107                break;
 108        case AMD_ID_DL322B:
 109                info->flash_id += FLASH_AMDL322B;
 110                info->sector_count = 71;
 111                info->size = 0x01000000;
 112                break;
 113        case AMD_ID_DL323T:
 114                info->flash_id += FLASH_AMDL323T;
 115                info->sector_count = 71;
 116                info->size = 0x01000000;
 117                break;
 118        case AMD_ID_DL323B:
 119                info->flash_id += FLASH_AMDL323B;
 120                info->sector_count = 71;
 121                info->size = 0x01000000;
 122                break;
 123        case AMD_ID_LV640U:
 124                info->flash_id += FLASH_AM640U;
 125                info->sector_count = 128;
 126                info->size = 0x02000000;
 127                break;
 128        default:
 129                /* Unknown flash type */
 130                info->flash_id = FLASH_UNKNOWN;
 131                return (0);
 132        }
 133
 134        if ((long)flashtest == AMD_ID_LV640U) {
 135                /* set up sector start adress table (uniform sector type) */
 136                for (i = 0; i < info->sector_count; i++)
 137                        info->start[i] = baseaddr + (i * 0x00040000);
 138        } else if (info->flash_id & FLASH_BTYPE) {
 139                /* set up sector start adress table (bottom sector type) */
 140                info->start[0] = baseaddr + 0x00000000;
 141                info->start[1] = baseaddr + 0x00010000;
 142                info->start[2] = baseaddr + 0x00018000;
 143                info->start[3] = baseaddr + 0x00020000;
 144                for (i = 4; i < info->sector_count; i++) {
 145                        info->start[i] = baseaddr + (i * 0x00040000) - 0x000C0000;
 146                }
 147        } else {
 148                /* set up sector start adress table (top sector type) */
 149                i = info->sector_count - 1;
 150                info->start[i--] = baseaddr + info->size - 0x00010000;
 151                info->start[i--] = baseaddr + info->size - 0x00018000;
 152                info->start[i--] = baseaddr + info->size - 0x00020000;
 153                for (; i >= 0; i--) {
 154                        info->start[i] = baseaddr + i * 0x00040000;
 155                }
 156        }
 157
 158        /* check for protected sectors */
 159        for (i = 0; i < info->sector_count; i++) {
 160                /* read sector protection at sector address, (A7 .. A0) = 0x02 */
 161                if (*(volatile DWORD*)(info->start[i] + 16) & 0x0001000100010001LL) {
 162                        info->protect[i] = 1;   /* D0 = 1 if protected */
 163                } else {
 164                        info->protect[i] = 0;
 165                }
 166        }
 167
 168        flash_reset ();
 169        return (info->size);
 170}
 171
 172/*-----------------------------------------------------------------------
 173 */
 174unsigned long flash_init (void)
 175{
 176        unsigned long size_b0 = 0;
 177        int i;
 178
 179        /* Init: no FLASHes known */
 180        for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; ++i) {
 181                flash_info[i].flash_id = FLASH_UNKNOWN;
 182        }
 183
 184        /* Static FLASH Bank configuration here (only one bank) */
 185        size_b0 = flash_get_size (CONFIG_SYS_FLASH_BASE, &flash_info[0]);
 186        if (flash_info[0].flash_id == FLASH_UNKNOWN || size_b0 == 0) {
 187                printf ("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n",
 188                                size_b0, size_b0 >> 20);
 189        }
 190
 191        /*
 192         * protect monitor and environment sectors
 193         */
 194#if CONFIG_SYS_MONITOR_BASE >= CONFIG_SYS_FLASH_BASE
 195        flash_protect (FLAG_PROTECT_SET,
 196                       CONFIG_SYS_MONITOR_BASE,
 197                       CONFIG_SYS_MONITOR_BASE + monitor_flash_len - 1, &flash_info[0]);
 198#endif
 199
 200#if defined(CONFIG_ENV_IS_IN_FLASH) && defined(CONFIG_ENV_ADDR)
 201# ifndef  CONFIG_ENV_SIZE
 202#  define CONFIG_ENV_SIZE       CONFIG_ENV_SECT_SIZE
 203# endif
 204        flash_protect (FLAG_PROTECT_SET,
 205                       CONFIG_ENV_ADDR,
 206                       CONFIG_ENV_ADDR + CONFIG_ENV_SIZE - 1, &flash_info[0]);
 207#endif
 208
 209        return (size_b0);
 210}
 211
 212/*-----------------------------------------------------------------------
 213 */
 214void flash_print_info (flash_info_t * info)
 215{
 216        int i;
 217
 218        if (info->flash_id == FLASH_UNKNOWN) {
 219                printf ("missing or unknown FLASH type\n");
 220                return;
 221        }
 222
 223        switch (info->flash_id & FLASH_VENDMASK) {
 224        case FLASH_MAN_AMD:
 225                printf ("AMD ");
 226                break;
 227        case FLASH_MAN_FUJ:
 228                printf ("FUJITSU ");
 229                break;
 230        default:
 231                printf ("Unknown Vendor ");
 232                break;
 233        }
 234
 235        switch (info->flash_id & FLASH_TYPEMASK) {
 236        case FLASH_AM800T:
 237                printf ("29LV800T (8 M, top sector)\n");
 238                break;
 239        case FLASH_AM800B:
 240                printf ("29LV800T (8 M, bottom sector)\n");
 241                break;
 242        case FLASH_AM160T:
 243                printf ("29LV160T (16 M, top sector)\n");
 244                break;
 245        case FLASH_AM160B:
 246                printf ("29LV160B (16 M, bottom sector)\n");
 247                break;
 248        case FLASH_AMDL322T:
 249                printf ("29DL322T (32 M, top sector)\n");
 250                break;
 251        case FLASH_AMDL322B:
 252                printf ("29DL322B (32 M, bottom sector)\n");
 253                break;
 254        case FLASH_AMDL323T:
 255                printf ("29DL323T (32 M, top sector)\n");
 256                break;
 257        case FLASH_AMDL323B:
 258                printf ("29DL323B (32 M, bottom sector)\n");
 259                break;
 260        case FLASH_AM640U:
 261                printf ("29LV640D (64 M, uniform sector)\n");
 262                break;
 263        default:
 264                printf ("Unknown Chip Type\n");
 265                break;
 266        }
 267
 268        printf ("  Size: %ld MB in %d Sectors\n",
 269                        info->size >> 20, info->sector_count);
 270
 271        printf ("  Sector Start Addresses:");
 272        for (i = 0; i < info->sector_count; ++i) {
 273                if ((i % 5) == 0)
 274                        printf ("\n   ");
 275                printf (" %08lX%s",
 276                        info->start[i],
 277                        info->protect[i] ? " (RO)" : "     "
 278                );
 279        }
 280        printf ("\n");
 281        return;
 282}
 283
 284/*-----------------------------------------------------------------------
 285 */
 286int flash_erase (flash_info_t * info, int s_first, int s_last)
 287{
 288        int flag, prot, sect, l_sect;
 289        ulong start, now, last;
 290        unsigned long msr;
 291        DWORD cmd_erase[6] = { 0x00AA00AA00AA00AALL, 0x0055005500550055LL,
 292                                                   0x0080008000800080LL, 0x00AA00AA00AA00AALL,
 293                                                   0x0055005500550055LL, 0x0030003000300030LL };
 294
 295        if ((s_first < 0) || (s_first > s_last)) {
 296                if (info->flash_id == FLASH_UNKNOWN) {
 297                        printf ("- missing\n");
 298                } else {
 299                        printf ("- no sectors to erase\n");
 300                }
 301                return 1;
 302        }
 303
 304        prot = 0;
 305        for (sect = s_first; sect <= s_last; sect++) {
 306                if (info->protect[sect])
 307                        prot++;
 308        }
 309
 310        if (prot) {
 311                printf ("- Warning: %d protected sectors will not be erased!\n",
 312                        prot);
 313        } else {
 314                printf ("\n");
 315        }
 316
 317        l_sect = -1;
 318
 319        /* Enable FPU */
 320        msr = get_msr();
 321        set_msr ( msr | MSR_FP );
 322
 323        /* Disable interrupts which might cause a timeout here */
 324        flag = disable_interrupts ();
 325
 326        write_via_fpu ((DWORD*)(info->start[0] + (0x0555 << 3)), &cmd_erase[0] );
 327        write_via_fpu ((DWORD*)(info->start[0] + (0x02AA << 3)), &cmd_erase[1] );
 328        write_via_fpu ((DWORD*)(info->start[0] + (0x0555 << 3)), &cmd_erase[2] );
 329        write_via_fpu ((DWORD*)(info->start[0] + (0x0555 << 3)), &cmd_erase[3] );
 330        write_via_fpu ((DWORD*)(info->start[0] + (0x02AA << 3)), &cmd_erase[4] );
 331        udelay (1000);
 332
 333        /* Start erase on unprotected sectors */
 334        for (sect = s_first; sect <= s_last; sect++) {
 335                if (info->protect[sect] == 0) { /* not protected */
 336                        write_via_fpu ((DWORD*)info->start[sect], &cmd_erase[5] );
 337                        l_sect = sect;
 338                }
 339        }
 340
 341        /* re-enable interrupts if necessary */
 342        if (flag)
 343                enable_interrupts ();
 344
 345        /* Restore FPU */
 346        set_msr (msr);
 347
 348        /* wait at least 80us - let's wait 1 ms */
 349        udelay (1000);
 350
 351        /*
 352         * We wait for the last triggered sector
 353         */
 354        if (l_sect < 0)
 355                goto DONE;
 356
 357        start = get_timer (0);
 358        last = start;
 359        while ((*(volatile DWORD*)info->start[l_sect] & 0x0080008000800080LL )
 360                                != 0x0080008000800080LL )
 361        {
 362                if ((now = get_timer (start)) > CONFIG_SYS_FLASH_ERASE_TOUT) {
 363                        printf ("Timeout\n");
 364                        return 1;
 365                }
 366                /* show that we're waiting */
 367                if ((now - last) > 1000) {      /* every second */
 368                        serial_putc ('.');
 369                        last = now;
 370                }
 371        }
 372
 373  DONE:
 374        /* reset to read mode */
 375        flash_reset ();
 376
 377        printf (" done\n");
 378        return 0;
 379}
 380
 381
 382/*-----------------------------------------------------------------------
 383 * Copy memory to flash, returns:
 384 * 0 - OK
 385 * 1 - write timeout
 386 * 2 - Flash not erased
 387 */
 388
 389int write_buff (flash_info_t * info, uchar * src, ulong addr, ulong cnt)
 390{
 391        ulong dp;
 392        static unsigned char bb[8];
 393        int i, l, rc, cc = cnt;
 394
 395        dp = (addr & ~7);               /* get lower dword aligned address */
 396
 397        /*
 398         * handle unaligned start bytes
 399         */
 400        if ((l = addr - dp) != 0) {
 401                for (i = 0; i < 8; i++)
 402                        bb[i] = (i < l || (i - l) >= cc) ? *(char*)(dp + i) : *src++;
 403                if ((rc = write_dword (info, dp, bb)) != 0) {
 404                        return (rc);
 405                }
 406                dp += 8;
 407                cc -= 8 - l;
 408        }
 409
 410        /*
 411         * handle word aligned part
 412         */
 413        while (cc >= 8) {
 414                if ((rc = write_dword (info, dp, src)) != 0) {
 415                        return (rc);
 416                }
 417                dp += 8;
 418                src += 8;
 419                cc -= 8;
 420        }
 421
 422        if (cc <= 0) {
 423                return (0);
 424        }
 425
 426        /*
 427         * handle unaligned tail bytes
 428         */
 429        for (i = 0; i < 8; i++) {
 430                bb[i] = (i < cc) ? *src++ : *(char*)(dp + i);
 431        }
 432        return (write_dword (info, dp, bb));
 433}
 434
 435/*-----------------------------------------------------------------------
 436 * Write a dword to Flash, returns:
 437 * 0 - OK
 438 * 1 - write timeout
 439 * 2 - Flash not erased
 440 */
 441static int write_dword (flash_info_t * info, ulong dest, unsigned char *pdata)
 442{
 443        ulong start;
 444        unsigned long msr;
 445        int flag, i;
 446        DWORD data;
 447        DWORD cmd_write[3] = { 0x00AA00AA00AA00AALL, 0x0055005500550055LL,
 448                                                   0x00A000A000A000A0LL };
 449
 450        for (data = 0, i = 0; i < 8; i++)
 451                data = (data << 8) + *pdata++;
 452
 453        /* Check if Flash is (sufficiently) erased */
 454        if ((*(DWORD*)dest & data) != data) {
 455                return (2);
 456        }
 457
 458        /* Enable FPU */
 459        msr = get_msr();
 460        set_msr( msr | MSR_FP );
 461
 462        /* Disable interrupts which might cause a timeout here */
 463        flag = disable_interrupts ();
 464
 465        write_via_fpu ((DWORD*)(info->start[0] + (0x0555 << 3)), &cmd_write[0] );
 466        write_via_fpu ((DWORD*)(info->start[0] + (0x02AA << 3)), &cmd_write[1] );
 467        write_via_fpu ((DWORD*)(info->start[0] + (0x0555 << 3)), &cmd_write[2] );
 468        write_via_fpu ((DWORD*)dest, &data );
 469
 470        /* re-enable interrupts if necessary */
 471        if (flag)
 472                enable_interrupts ();
 473
 474        /* Restore FPU */
 475        set_msr(msr);
 476
 477        /* data polling for D7 */
 478        start = get_timer (0);
 479        while (*(volatile DWORD*)dest != data ) {
 480                if (get_timer (start) > CONFIG_SYS_FLASH_WRITE_TOUT) {
 481                        return (1);
 482                }
 483        }
 484        return (0);
 485}
 486
 487/*-----------------------------------------------------------------------
 488 */
 489static void write_via_fpu (volatile DWORD* addr, DWORD* data)
 490{
 491        __asm__ __volatile__ ("lfd  1, 0(%0)"::"r" (data));
 492        __asm__ __volatile__ ("stfd 1, 0(%0)"::"r" (addr));
 493        __asm__ __volatile__ ("eieio");
 494}
 495