LXR uboot/board/xsengine/flash.c

   1/*
   2 * (C) Copyright 2002
   3 * Robert Schwebel, Pengutronix, <r.schwebel@pengutronix.de>
   4 *
   5 * (C) Copyright 2000-2004
   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 <linux/byteorder/swab.h>
  29
  30#define SWAP(x)               __swab32(x)
  31
  32flash_info_t    flash_info[CONFIG_SYS_MAX_FLASH_BANKS]; /* info for FLASH chips */
  33
  34/* Functions */
  35static ulong flash_get_size (vu_long *addr, flash_info_t *info);
  36static int write_word (flash_info_t *info, ulong dest, ulong data);
  37static void flash_get_offsets (ulong base, flash_info_t *info);
  38
  39/*-----------------------------------------------------------------------
  40 */
  41unsigned long flash_init (void)
  42{
  43        int i;
  44        ulong size = 0;
  45
  46        for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; i++) {
  47                switch (i) {
  48                case 0:
  49                        flash_get_size ((vu_long *) PHYS_FLASH_1, &flash_info[i]);
  50                        flash_get_offsets (PHYS_FLASH_1, &flash_info[i]);
  51                        break;
  52                case 1:
  53                        flash_get_size ((vu_long *) PHYS_FLASH_2, &flash_info[i]);
  54                        flash_get_offsets (PHYS_FLASH_2, &flash_info[i]);
  55                        break;
  56                default:
  57                        panic ("configured too many flash banks!\n");
  58                        break;
  59                }
  60                size += flash_info[i].size;
  61        }
  62
  63        /* Protect monitor and environment sectors */
  64        flash_protect ( FLAG_PROTECT_SET,CONFIG_SYS_FLASH_BASE,CONFIG_SYS_FLASH_BASE + monitor_flash_len - 1,&flash_info[0] );
  65        flash_protect ( FLAG_PROTECT_SET,CONFIG_ENV_ADDR,CONFIG_ENV_ADDR + CONFIG_ENV_SIZE - 1, &flash_info[0] );
  66
  67        return size;
  68}
  69
  70/*-----------------------------------------------------------------------
  71 */
  72static void flash_get_offsets (ulong base, flash_info_t *info)
  73{
  74        int i;
  75
  76        if (info->flash_id == FLASH_UNKNOWN) return;
  77
  78        if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_AMD) {
  79                for (i = 0; i < info->sector_count; i++) {
  80                        info->start[i] = base + (i * PHYS_FLASH_SECT_SIZE);
  81                        info->protect[i] = 0;
  82                }
  83        }
  84}
  85
  86/*-----------------------------------------------------------------------
  87 */
  88void flash_print_info  (flash_info_t *info)
  89{
  90        int i;
  91
  92        if (info->flash_id == FLASH_UNKNOWN) {
  93                printf ("missing or unknown FLASH type\n");
  94                return;
  95        }
  96
  97        switch (info->flash_id & FLASH_VENDMASK) {
  98        case FLASH_MAN_AMD:     printf ("AMD ");                break;
  99        case FLASH_MAN_FUJ:     printf ("FUJITSU ");            break;
 100        default:                printf ("Unknown Vendor ");     break;
 101        }
 102
 103        switch (info->flash_id & FLASH_TYPEMASK) {
 104        case FLASH_AMLV640U:    printf ("AM29LV640ML (64Mbit, uniform sector size)\n");
 105                                break;
 106        case FLASH_S29GL064M:   printf ("S29GL064M (64Mbit, top boot sector size)\n");
 107                                break;
 108        default:                printf ("Unknown Chip Type\n");
 109                                break;
 110        }
 111
 112        printf ("  Size: %ld MB in %d Sectors\n",
 113                info->size >> 20, info->sector_count);
 114
 115        printf ("  Sector Start Addresses:");
 116        for (i=0; i<info->sector_count; ++i) {
 117                if ((i % 5) == 0)
 118                        printf ("\n   ");
 119                printf (" %08lX%s",
 120                        info->start[i],
 121                        info->protect[i] ? " (RO)" : "     "
 122                );
 123        }
 124        printf ("\n");
 125        return;
 126}
 127
 128/*
 129 * The following code cannot be run from FLASH!
 130 */
 131static ulong flash_get_size (vu_long *addr, flash_info_t *info)
 132{
 133        short i;
 134        ulong value;
 135        ulong base = (ulong)addr;
 136
 137        /* Write auto select command: read Manufacturer ID */
 138        addr[0x0555] = 0x00AA00AA;
 139        addr[0x02AA] = 0x00550055;
 140        addr[0x0555] = 0x00900090;
 141
 142        value = addr[0];
 143
 144        debug ("Manuf. ID @ 0x%08lx: 0x%08lx\n", (ulong)addr, value);
 145
 146        switch (value) {
 147        case AMD_MANUFACT:
 148                debug ("Manufacturer: AMD\n");
 149                info->flash_id = FLASH_MAN_AMD;
 150                break;
 151        case FUJ_MANUFACT:
 152                debug ("Manufacturer: FUJITSU\n");
 153                info->flash_id = FLASH_MAN_FUJ;
 154                break;
 155        default:
 156                debug ("Manufacturer: *** unknown ***\n");
 157                info->flash_id = FLASH_UNKNOWN;
 158                info->sector_count = 0;
 159                info->size = 0;
 160                return (0);                     /* no or unknown flash  */
 161        }
 162
 163        value = addr[1];                        /* device ID            */
 164
 165        debug ("Device ID @ 0x%08lx: 0x%08lx\n", (ulong)(&addr[1]), value);
 166
 167        switch (value) {
 168
 169        case AMD_ID_MIRROR:
 170                debug ("Mirror Bit flash: addr[14] = %08lX  addr[15] = %08lX\n",
 171                        addr[14], addr[15]);
 172                switch(addr[14]) {
 173                case AMD_ID_LV640U_2:
 174                        if (addr[15] != AMD_ID_LV640U_3) {
 175                                debug ("Chip: AMLV640U -> unknown\n");
 176                                info->flash_id = FLASH_UNKNOWN;
 177                        } else {
 178                                debug ("Chip: AMLV640U\n");
 179                                info->flash_id += FLASH_AMLV640U;
 180                                info->sector_count = 128;
 181                                info->size = 0x01000000;
 182                        }
 183                        break;                          /* => 16 MB     */
 184                case AMD_ID_GL064MT_2:
 185                        if (addr[15] != AMD_ID_GL064MT_3) {
 186                                debug ("Chip: S29GL064M-R3 -> unknown\n");
 187                                info->flash_id = FLASH_UNKNOWN;
 188                        } else {
 189                                debug ("Chip: S29GL064M-R3\n");
 190                                info->flash_id += FLASH_S29GL064M;
 191                                info->sector_count = 128;
 192                                info->size = 0x01000000;
 193                        }
 194                        break;                          /* => 16 MB     */
 195                default:
 196                        debug ("Chip: *** unknown ***\n");
 197                        info->flash_id = FLASH_UNKNOWN;
 198                        break;
 199                }
 200                break;
 201
 202        default:
 203                info->flash_id = FLASH_UNKNOWN;
 204                return (0);                     /* => no or unknown flash */
 205        }
 206
 207        /* set up sector start address table */
 208        switch (value) {
 209        case AMD_ID_MIRROR:
 210                switch (info->flash_id & FLASH_TYPEMASK) {
 211                /* only known types here - no default */
 212                case FLASH_AMLV128U:
 213                case FLASH_AMLV640U:
 214                case FLASH_AMLV320U:
 215                        for (i = 0; i < info->sector_count; i++) {
 216                                info->start[i] = base;
 217                                base += 0x20000;
 218                        }
 219                        break;
 220                case FLASH_AMLV320B:
 221                        for (i = 0; i < info->sector_count; i++) {
 222                                info->start[i] = base;
 223                                /*
 224                                 * The first 8 sectors are 8 kB,
 225                                 * all the other ones  are 64 kB
 226                                 */
 227                                base += (i < 8)
 228                                        ?  2 * ( 8 << 10)
 229                                        :  2 * (64 << 10);
 230                        }
 231                        break;
 232                }
 233                break;
 234
 235        default:
 236                return (0);
 237                break;
 238        }
 239
 240#if 0
 241        /* check for protected sectors */
 242        for (i = 0; i < info->sector_count; i++) {
 243                /* read sector protection at sector address, (A7 .. A0) = 0x02 */
 244                /* D0 = 1 if protected */
 245                addr = (volatile unsigned long *)(info->start[i]);
 246                info->protect[i] = addr[2] & 1;
 247        }
 248#endif
 249
 250        /*
 251         * Prevent writes to uninitialized FLASH.
 252         */
 253        if (info->flash_id != FLASH_UNKNOWN) {
 254                addr = (volatile unsigned long *)info->start[0];
 255
 256                *addr = 0x00F000F0;     /* reset bank */
 257        }
 258
 259        return (info->size);
 260}
 261
 262
 263/*-----------------------------------------------------------------------
 264 */
 265
 266int     flash_erase (flash_info_t *info, int s_first, int s_last)
 267{
 268        vu_long *addr = (vu_long*)(info->start[0]);
 269        int flag, prot, sect, l_sect;
 270        ulong start, now, last;
 271
 272        debug ("flash_erase: first: %d last: %d\n", s_first, s_last);
 273
 274        if ((s_first < 0) || (s_first > s_last)) {
 275                if (info->flash_id == FLASH_UNKNOWN) {
 276                        printf ("- missing\n");
 277                } else {
 278                        printf ("- no sectors to erase\n");
 279                }
 280                return 1;
 281        }
 282
 283        if ((info->flash_id == FLASH_UNKNOWN) ||
 284            (info->flash_id > FLASH_AMD_COMP)) {
 285                printf ("Can't erase unknown flash type %08lx - aborted\n",
 286                        info->flash_id);
 287                return 1;
 288        }
 289
 290        prot = 0;
 291        for (sect=s_first; sect<=s_last; ++sect) {
 292                if (info->protect[sect]) {
 293                        prot++;
 294                }
 295        }
 296
 297        if (prot) {
 298                printf ("- Warning: %d protected sectors will not be erased!\n",
 299                        prot);
 300        } else {
 301                printf ("\n");
 302        }
 303
 304        l_sect = -1;
 305
 306        /* Disable interrupts which might cause a timeout here */
 307        flag = disable_interrupts();
 308
 309        addr[0x0555] = 0x00AA00AA;
 310        addr[0x02AA] = 0x00550055;
 311        addr[0x0555] = 0x00800080;
 312        addr[0x0555] = 0x00AA00AA;
 313        addr[0x02AA] = 0x00550055;
 314
 315        /* Start erase on unprotected sectors */
 316        for (sect = s_first; sect<=s_last; sect++) {
 317                if (info->protect[sect] == 0) { /* not protected */
 318                        addr = (vu_long*)(info->start[sect]);
 319                        addr[0] = 0x00300030;
 320                        l_sect = sect;
 321                }
 322        }
 323
 324        /* re-enable interrupts if necessary */
 325        if (flag)
 326                enable_interrupts();
 327
 328        /* wait at least 80us - let's wait 1 ms */
 329        udelay (1000);
 330
 331        /*
 332         * We wait for the last triggered sector
 333         */
 334        if (l_sect < 0)
 335                goto DONE;
 336
 337        start = get_timer (0);
 338        last  = start;
 339        addr = (vu_long*)(info->start[l_sect]);
 340        while ((addr[0] & 0x00800080) != 0x00800080) {
 341                if ((now = get_timer(start)) > CONFIG_SYS_FLASH_ERASE_TOUT) {
 342                        printf ("Timeout\n");
 343                        return 1;
 344                }
 345                /* show that we're waiting */
 346                if ((now - last) > 100000) {    /* every second */
 347                        putc ('.');
 348                        last = now;
 349                }
 350        }
 351
 352DONE:
 353        /* reset to read mode */
 354        addr = (volatile unsigned long *)info->start[0];
 355        addr[0] = 0x00F000F0;   /* reset bank */
 356
 357        printf (" done\n");
 358        return 0;
 359}
 360
 361/*-----------------------------------------------------------------------
 362 * Copy memory to flash, returns:
 363 * 0 - OK
 364 * 1 - write timeout
 365 * 2 - Flash not erased
 366 */
 367
 368int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt)
 369{
 370        ulong cp, wp, data;
 371        int i, l, rc;
 372
 373        wp = (addr & ~3);       /* get lower word aligned address */
 374
 375        /*
 376         * handle unaligned start bytes
 377         */
 378        if ((l = addr - wp) != 0) {
 379                data = 0;
 380                for (i=0, cp=wp; i<l; ++i, ++cp) {
 381                        data = (data << 8) | (*(uchar *)cp);
 382                }
 383                for (; i<4 && cnt>0; ++i) {
 384                        data = (data << 8) | *src++;
 385                        --cnt;
 386                        ++cp;
 387                }
 388                for (; cnt==0 && i<4; ++i, ++cp) {
 389                        data = (data << 8) | (*(uchar *)cp);
 390                }
 391
 392                if ((rc = write_word(info, wp, SWAP(data))) != 0) {
 393                        return (rc);
 394                }
 395                wp += 4;
 396        }
 397
 398        /*
 399         * handle word aligned part
 400         */
 401        while (cnt >= 4) {
 402                data = 0;
 403                for (i=0; i<4; ++i) {
 404                        data = (data << 8) | *src++;
 405                }
 406                if ((rc = write_word(info, wp, SWAP(data))) != 0) {
 407                        return (rc);
 408                }
 409                wp  += 4;
 410                cnt -= 4;
 411        }
 412
 413        if (cnt == 0) {
 414                return (0);
 415        }
 416
 417        /*
 418         * handle unaligned tail bytes
 419         */
 420        data = 0;
 421        for (i=0, cp=wp; i<4 && cnt>0; ++i, ++cp) {
 422                data = (data << 8) | *src++;
 423                --cnt;
 424        }
 425        for (; i<4; ++i, ++cp) {
 426                data = (data << 8) | (*(uchar *)cp);
 427        }
 428
 429        return (write_word(info, wp, SWAP(data)));
 430}
 431
 432/*-----------------------------------------------------------------------
 433 * Write a word to Flash, returns:
 434 * 0 - OK
 435 * 1 - write timeout
 436 * 2 - Flash not erased
 437 */
 438static int write_word (flash_info_t *info, ulong dest, ulong data)
 439{
 440        vu_long *addr = (vu_long*)(info->start[0]);
 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        /* Disable interrupts which might cause a timeout here */
 450        flag = disable_interrupts();
 451
 452        addr[0x0555] = 0x00AA00AA;
 453        addr[0x02AA] = 0x00550055;
 454        addr[0x0555] = 0x00A000A0;
 455
 456        *((vu_long *)dest) = data;
 457
 458        /* re-enable interrupts if necessary */
 459        if (flag)
 460                enable_interrupts();
 461
 462        /* data polling for D7 */
 463        start = get_timer (0);
 464        while ((*((vu_long *)dest) & 0x00800080) != (data & 0x00800080)) {
 465                if (get_timer(start) > CONFIG_SYS_FLASH_WRITE_TOUT) {
 466                        return (1);
 467                }
 468        }
 469        return (0);
 470}
 471