LXR uboot/board/kup/common/flash.c

   1/*
   2 * (C) Copyright 2000-2004
   3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   4 *
   5 * See file CREDITS for list of people who contributed to this
   6 * project.
   7 *
   8 * This program is free software; you can redistribute it and/or
   9 * modify it under the terms of the GNU General Public License as
  10 * published by the Free Software Foundation; either version 2 of
  11 * the License, or (at your option) any later version.
  12 *
  13 * This program is distributed in the hope that it will be useful,
  14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 * GNU General Public License for more details.
  17 *
  18 * You should have received a copy of the GNU General Public License
  19 * along with this program; if not, write to the Free Software
  20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  21 * MA 02111-1307 USA
  22 */
  23
  24#include <common.h>
  25#include <mpc8xx.h>
  26
  27#ifndef CONFIG_ENV_ADDR
  28#define CONFIG_ENV_ADDR (CONFIG_SYS_FLASH_BASE + CONFIG_ENV_OFFSET)
  29#endif
  30
  31#define CONFIG_FLASH_16BIT
  32
  33flash_info_t    flash_info[CONFIG_SYS_MAX_FLASH_BANKS]; /* info for FLASH chips */
  34
  35/*-----------------------------------------------------------------------
  36 * Functions
  37 */
  38static ulong flash_get_size (vu_long *addr, flash_info_t *info);
  39static int write_word (flash_info_t *info, ulong dest, ulong data);
  40
  41/*-----------------------------------------------------------------------
  42 */
  43
  44unsigned long flash_init (void)
  45{
  46        volatile immap_t     *immap  = (immap_t *)CONFIG_SYS_IMMR;
  47        volatile memctl8xx_t *memctl = &immap->im_memctl;
  48        unsigned long size_b0;
  49        int i;
  50
  51        /* Init: no FLASHes known */
  52        for (i=0; i<CONFIG_SYS_MAX_FLASH_BANKS; ++i) {
  53                flash_info[i].flash_id = FLASH_UNKNOWN;
  54        }
  55
  56        /* Static FLASH Bank configuration here - FIXME XXX */
  57
  58        size_b0 = flash_get_size((vu_long *)FLASH_BASE0_PRELIM, &flash_info[0]);
  59
  60        if (flash_info[0].flash_id == FLASH_UNKNOWN) {
  61                printf ("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n",
  62                        size_b0, size_b0<<20);
  63        }
  64
  65
  66        /* Remap FLASH according to real size */
  67        memctl->memc_or0 = CONFIG_SYS_OR_TIMING_FLASH | (-size_b0 & OR_AM_MSK);
  68        memctl->memc_br0 = (CONFIG_SYS_FLASH_BASE & BR_BA_MSK) | BR_MS_GPCM | BR_V | BR_PS_16;
  69
  70        /* Re-do sizing to get full correct info */
  71        size_b0 = flash_get_size((vu_long *)CONFIG_SYS_FLASH_BASE, &flash_info[0]);
  72
  73#if CONFIG_SYS_MONITOR_BASE >= CONFIG_SYS_FLASH_BASE
  74        /* monitor protection ON by default */
  75        flash_protect(FLAG_PROTECT_SET,
  76                      CONFIG_SYS_MONITOR_BASE,
  77                      CONFIG_SYS_MONITOR_BASE+monitor_flash_len-1,
  78                      &flash_info[0]);
  79#endif
  80
  81#ifdef  CONFIG_ENV_IS_IN_FLASH
  82        /* ENV protection ON by default */
  83        flash_protect(FLAG_PROTECT_SET,
  84                      CONFIG_ENV_ADDR,
  85                      CONFIG_ENV_ADDR+CONFIG_ENV_SIZE-1,
  86                      &flash_info[0]);
  87#endif
  88
  89        flash_info[0].size = size_b0;
  90
  91        return (size_b0);
  92}
  93
  94/*-----------------------------------------------------------------------
  95 */
  96void flash_print_info  (flash_info_t *info)
  97{
  98        int i;
  99
 100        if (info->flash_id == FLASH_UNKNOWN) {
 101                printf ("missing or unknown FLASH type\n");
 102                return;
 103        }
 104
 105        switch (info->flash_id & FLASH_VENDMASK) {
 106        case FLASH_MAN_AMD:     printf ("AMD ");                break;
 107        case FLASH_MAN_FUJ:     printf ("FUJITSU ");            break;
 108        default:                printf ("Unknown Vendor ");     break;
 109        }
 110
 111        switch (info->flash_id & FLASH_TYPEMASK) {
 112        case FLASH_AM400B:      printf ("AM29LV400B (4 Mbit, bottom boot sect)\n");
 113                                break;
 114        case FLASH_AM400T:      printf ("AM29LV400T (4 Mbit, top boot sector)\n");
 115                                break;
 116        case FLASH_AM800B:      printf ("AM29LV800B (8 Mbit, bottom boot sect)\n");
 117                                break;
 118        case FLASH_AM800T:      printf ("AM29LV800T (8 Mbit, top boot sector)\n");
 119                                break;
 120        case FLASH_AM160B:      printf ("AM29LV160B (16 Mbit, bottom boot sect)\n");
 121                                break;
 122        case FLASH_AM160T:      printf ("AM29LV160T (16 Mbit, top boot sector)\n");
 123                                break;
 124        case FLASH_AM320B:      printf ("AM29LV320B (32 Mbit, bottom boot sect)\n");
 125                                break;
 126        case FLASH_AM320T:      printf ("AM29LV320T (32 Mbit, top boot sector)\n");
 127                                break;
 128        default:                printf ("Unknown Chip Type\n");
 129                                break;
 130        }
 131
 132        printf ("  Size: %ld MB in %d Sectors\n",
 133                info->size >> 20, info->sector_count);
 134
 135        printf ("  Sector Start Addresses:");
 136        for (i=0; i<info->sector_count; ++i) {
 137                if ((i % 5) == 0)
 138                        printf ("\n   ");
 139                printf (" %08lX%s",
 140                        info->start[i],
 141                        info->protect[i] ? " (RO)" : "     "
 142                );
 143        }
 144        printf ("\n");
 145        return;
 146}
 147
 148/*-----------------------------------------------------------------------
 149 */
 150
 151
 152/*-----------------------------------------------------------------------
 153 */
 154
 155/*
 156 * The following code cannot be run from FLASH!
 157 */
 158
 159static ulong flash_get_size (vu_long *addr, flash_info_t *info)
 160{
 161        short i;
 162        ulong value;
 163        ulong base = (ulong)addr;
 164
 165        /* Write auto select command: read Manufacturer ID */
 166        vu_short *s_addr=(vu_short*)addr;
 167        s_addr[0x5555] = 0x00AA;
 168        s_addr[0x2AAA] = 0x0055;
 169        s_addr[0x5555] = 0x0090;
 170
 171        value = s_addr[0];
 172        value = value|(value<<16);
 173
 174        switch (value) {
 175        case AMD_MANUFACT:
 176                info->flash_id = FLASH_MAN_AMD;
 177                break;
 178        case FUJ_MANUFACT:
 179                info->flash_id = FLASH_MAN_FUJ;
 180                break;
 181        default:
 182                info->flash_id = FLASH_UNKNOWN;
 183                info->sector_count = 0;
 184                info->size = 0;
 185                return (0);                     /* no or unknown flash  */
 186        }
 187
 188        value = s_addr[1];
 189        value = value|(value<<16);
 190
 191                switch (value) {
 192        case FUJI_ID_29F800BA:
 193                info->flash_id += FLASH_AM400T;
 194                info->sector_count = 19;
 195                info->size = 0x00100000;
 196                break;                          /* => 1 MB              */
 197        case AMD_ID_LV800T:
 198                info->flash_id += FLASH_AM800T;
 199                info->sector_count = 19;
 200                info->size = 0x00100000;
 201                break;                          /* => 1 MB              */
 202        case AMD_ID_LV800B:
 203                info->flash_id += FLASH_AM800B;
 204                info->sector_count = 19;
 205                info->size = 0x00100000;
 206                break;                          /* => 1 MB              */
 207        default:
 208                info->flash_id = FLASH_UNKNOWN;
 209                return (0);                     /* => no or unknown flash */
 210        }
 211
 212        /* set up sector start address table */
 213        /* set sector offsets for bottom boot block type        */
 214        info->start[0] = base + 0x00000000;
 215        info->start[1] = base + 0x00004000;
 216        info->start[2] = base + 0x00006000;
 217        info->start[3] = base + 0x00008000;
 218        for (i = 4; i < info->sector_count; i++) {
 219                info->start[i] = base + (i * 0x00010000) - 0x00030000;
 220        }
 221
 222
 223        /* check for protected sectors */
 224        for (i = 0; i < info->sector_count; i++) {
 225                /* read sector protection at sector address, (A7 .. A0) = 0x02 */
 226                /* D0 = 1 if protected */
 227                s_addr = (volatile unsigned short *)(info->start[i]);
 228                info->protect[i] = s_addr[2] & 1;
 229        }
 230
 231        /*
 232         * Prevent writes to uninitialized FLASH.
 233         */
 234        if (info->flash_id != FLASH_UNKNOWN) {
 235                s_addr = (volatile unsigned short *)info->start[0];
 236                *s_addr = 0x00F0;       /* reset bank */
 237        }
 238        return (info->size);
 239}
 240
 241
 242/*-----------------------------------------------------------------------
 243 */
 244
 245
 246int     flash_erase (flash_info_t *info, int s_first, int s_last)
 247{
 248        vu_long *addr = (vu_long*)(info->start[0]);
 249        int flag, prot, sect;
 250        ulong start, now, last;
 251#ifdef CONFIG_FLASH_16BIT
 252        vu_short *s_addr = (vu_short*)addr;
 253#endif
 254
 255        if ((s_first < 0) || (s_first > s_last)) {
 256                if (info->flash_id == FLASH_UNKNOWN) {
 257                        printf ("- missing\n");
 258                } else {
 259                        printf ("- no sectors to erase\n");
 260                }
 261                return 1;
 262        }
 263/*#ifndef CONFIG_FLASH_16BIT
 264        ulong type;
 265        type = (info->flash_id & FLASH_VENDMASK);
 266        if ((type != FLASH_MAN_SST) && (type != FLASH_MAN_STM)) {
 267                printf ("Can't erase unknown flash type %08lx - aborted\n",
 268                        info->flash_id);
 269                return;
 270        }
 271#endif*/
 272        prot = 0;
 273        for (sect=s_first; sect<=s_last; ++sect) {
 274                if (info->protect[sect]) {
 275                        prot++;
 276                }
 277        }
 278
 279        if (prot) {
 280                printf ("- Warning: %d protected sectors will not be erased!\n",
 281                        prot);
 282        } else {
 283                printf ("\n");
 284        }
 285
 286        start = get_timer (0);
 287        last  = start;
 288        /* Start erase on unprotected sectors */
 289        for (sect = s_first; sect<=s_last; sect++) {
 290                if (info->protect[sect] == 0) { /* not protected */
 291#ifdef CONFIG_FLASH_16BIT
 292                        vu_short *s_sect_addr = (vu_short*)(info->start[sect]);
 293#else
 294                        vu_long *sect_addr = (vu_long*)(info->start[sect]);
 295#endif
 296                        /* Disable interrupts which might cause a timeout here */
 297                        flag = disable_interrupts();
 298
 299#ifdef CONFIG_FLASH_16BIT
 300
 301                        /*printf("\ns_sect_addr=%x",s_sect_addr);*/
 302                        s_addr[0x5555] = 0x00AA;
 303                        s_addr[0x2AAA] = 0x0055;
 304                        s_addr[0x5555] = 0x0080;
 305                        s_addr[0x5555] = 0x00AA;
 306                        s_addr[0x2AAA] = 0x0055;
 307                        s_sect_addr[0] = 0x0030;
 308#else
 309                        addr[0x5555] = 0x00AA00AA;
 310                        addr[0x2AAA] = 0x00550055;
 311                        addr[0x5555] = 0x00800080;
 312                        addr[0x5555] = 0x00AA00AA;
 313                        addr[0x2AAA] = 0x00550055;
 314                        sect_addr[0] = 0x00300030;
 315#endif
 316                        /* re-enable interrupts if necessary */
 317                        if (flag)
 318                                enable_interrupts();
 319
 320                        /* wait at least 80us - let's wait 1 ms */
 321                        udelay (1000);
 322
 323#ifdef CONFIG_FLASH_16BIT
 324                        while ((s_sect_addr[0] & 0x0080) != 0x0080) {
 325#else
 326                        while ((sect_addr[0] & 0x00800080) != 0x00800080) {
 327#endif
 328                                if ((now = get_timer(start)) > CONFIG_SYS_FLASH_ERASE_TOUT) {
 329                                        printf ("Timeout\n");
 330                                        return 1;
 331                                }
 332                                /* show that we're waiting */
 333                                if ((now - last) > 1000) {      /* every second */
 334                                        putc ('.');
 335                                        last = now;
 336                                }
 337                        }
 338                }
 339        }
 340
 341        /* reset to read mode */
 342        addr = (volatile unsigned long *)info->start[0];
 343#ifdef CONFIG_FLASH_16BIT
 344        s_addr[0] = 0x00F0;     /* reset bank */
 345#else
 346        addr[0] = 0x00F000F0;   /* reset bank */
 347#endif
 348
 349        printf (" done\n");
 350        return 0;
 351}
 352
 353
 354/*-----------------------------------------------------------------------
 355 * Copy memory to flash, returns:
 356 * 0 - OK
 357 * 1 - write timeout
 358 * 2 - Flash not erased
 359 */
 360
 361int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt)
 362{
 363        ulong cp, wp, data;
 364        int i, l, rc;
 365
 366        wp = (addr & ~3);       /* get lower word aligned address */
 367
 368        /*
 369         * handle unaligned start bytes
 370         */
 371        if ((l = addr - wp) != 0) {
 372                data = 0;
 373                for (i=0, cp=wp; i<l; ++i, ++cp) {
 374                        data = (data << 8) | (*(uchar *)cp);
 375                }
 376                for (; i<4 && cnt>0; ++i) {
 377                        data = (data << 8) | *src++;
 378                        --cnt;
 379                        ++cp;
 380                }
 381                for (; cnt==0 && i<4; ++i, ++cp) {
 382                        data = (data << 8) | (*(uchar *)cp);
 383                }
 384
 385                if ((rc = write_word(info, wp, data)) != 0) {
 386                        return (rc);
 387                }
 388                wp += 4;
 389        }
 390
 391        /*
 392         * handle word aligned part
 393         */
 394        while (cnt >= 4) {
 395                data = 0;
 396                for (i=0; i<4; ++i) {
 397                        data = (data << 8) | *src++;
 398                }
 399                if ((rc = write_word(info, wp, data)) != 0) {
 400                        return (rc);
 401                }
 402                wp  += 4;
 403                cnt -= 4;
 404        }
 405
 406        if (cnt == 0) {
 407                return (0);
 408        }
 409
 410        /*
 411         * handle unaligned tail bytes
 412         */
 413        data = 0;
 414        for (i=0, cp=wp; i<4 && cnt>0; ++i, ++cp) {
 415                data = (data << 8) | *src++;
 416                --cnt;
 417        }
 418        for (; i<4; ++i, ++cp) {
 419                data = (data << 8) | (*(uchar *)cp);
 420        }
 421
 422        return (write_word(info, wp, data));
 423}
 424
 425
 426/*-----------------------------------------------------------------------
 427 * Write a word to Flash, returns:
 428 * 0 - OK
 429 * 1 - write timeout
 430 * 2 - Flash not erased
 431 */
 432static int write_word (flash_info_t *info, ulong dest, ulong data)
 433{
 434        vu_long *addr = (vu_long*)(info->start[0]);
 435
 436#ifdef CONFIG_FLASH_16BIT
 437        vu_short high_data;
 438        vu_short low_data;
 439        vu_short *s_addr = (vu_short*)addr;
 440#endif
 441        ulong start;
 442        int flag;
 443
 444        /* Check if Flash is (sufficiently) erased */
 445        if ((*((vu_long *)dest) & data) != data) {
 446                return (2);
 447        }
 448
 449#ifdef CONFIG_FLASH_16BIT
 450        /* Write the 16 higher-bits */
 451        /* Disable interrupts which might cause a timeout here */
 452        flag = disable_interrupts();
 453
 454        high_data = ((data>>16) & 0x0000ffff);
 455
 456        s_addr[0x5555] = 0x00AA;
 457        s_addr[0x2AAA] = 0x0055;
 458        s_addr[0x5555] = 0x00A0;
 459
 460        *((vu_short *)dest) = high_data;
 461
 462
 463        /* re-enable interrupts if necessary */
 464        if (flag)
 465                enable_interrupts();
 466
 467        /* data polling for D7 */
 468        start = get_timer (0);
 469        while ((*((vu_short *)dest) & 0x0080) != (high_data & 0x0080)) {
 470                if (get_timer(start) > CONFIG_SYS_FLASH_WRITE_TOUT) {
 471                        return (1);
 472                }
 473        }
 474
 475
 476        /* Write the 16 lower-bits */
 477#endif
 478
 479        /* Disable interrupts which might cause a timeout here */
 480        flag = disable_interrupts();
 481#ifdef CONFIG_FLASH_16BIT
 482        dest += 0x2;
 483        low_data = (data & 0x0000ffff);
 484
 485        s_addr[0x5555] = 0x00AA;
 486        s_addr[0x2AAA] = 0x0055;
 487        s_addr[0x5555] = 0x00A0;
 488        *((vu_short *)dest) = low_data;
 489
 490#else
 491        addr[0x5555] = 0x00AA00AA;
 492        addr[0x2AAA] = 0x00550055;
 493        addr[0x5555] = 0x00A000A0;
 494        *((vu_long *)dest) = data;
 495#endif
 496
 497        /* re-enable interrupts if necessary */
 498        if (flag)
 499                enable_interrupts();
 500
 501        /* data polling for D7 */
 502        start = get_timer (0);
 503
 504#ifdef CONFIG_FLASH_16BIT
 505        while ((*((vu_short *)dest) & 0x0080) != (low_data & 0x0080)) {
 506#else
 507        while ((*((vu_long *)dest) & 0x00800080) != (data & 0x00800080)) {
 508#endif
 509
 510                if (get_timer(start) > CONFIG_SYS_FLASH_WRITE_TOUT) {
 511                        return (1);
 512                }
 513        }
 514        return (0);
 515}
 516