LXR uboot/board/lpd7a40x/flash.c

   1/*
   2 * (C) Copyright 2002
   3 * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
   4 * Marius Groeger <mgroeger@sysgo.de>
   5 *
   6 * (C) Copyright 2002
   7 * Gary Jennejohn, DENX Software Engineering, <garyj@denx.de>
   8 *
   9 * See file CREDITS for list of people who contributed to this
  10 * project.
  11 *
  12 * This program is free software; you can redistribute it and/or
  13 * modify it under the terms of the GNU General Public License as
  14 * published by the Free Software Foundation; either version 2 of
  15 * the License, or (at your option) any later version.
  16 *
  17 * This program is distributed in the hope that it will be useful,
  18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20 * GNU General Public License for more details.
  21 *
  22 * You should have received a copy of the GNU General Public License
  23 * along with this program; if not, write to the Free Software
  24 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  25 * MA 02111-1307 USA
  26 */
  27
  28/* #define DEBUG */
  29
  30#include <common.h>
  31#include <environment.h>
  32
  33#define FLASH_BANK_SIZE 0x1000000       /* 16MB (2 x 8 MB) */
  34#define MAIN_SECT_SIZE  0x40000         /* 256KB (2 x 128kB) */
  35
  36flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS];
  37
  38
  39#define CMD_READ_ARRAY          0x00FF00FF
  40#define CMD_IDENTIFY            0x00900090
  41#define CMD_ERASE_SETUP         0x00200020
  42#define CMD_ERASE_CONFIRM       0x00D000D0
  43#define CMD_PROGRAM             0x00400040
  44#define CMD_RESUME              0x00D000D0
  45#define CMD_SUSPEND             0x00B000B0
  46#define CMD_STATUS_READ         0x00700070
  47#define CMD_STATUS_RESET        0x00500050
  48
  49#define BIT_BUSY                0x00800080
  50#define BIT_ERASE_SUSPEND       0x00400040
  51#define BIT_ERASE_ERROR         0x00200020
  52#define BIT_PROGRAM_ERROR       0x00100010
  53#define BIT_VPP_RANGE_ERROR     0x00080008
  54#define BIT_PROGRAM_SUSPEND     0x00040004
  55#define BIT_PROTECT_ERROR       0x00020002
  56#define BIT_UNDEFINED           0x00010001
  57
  58#define BIT_SEQUENCE_ERROR      0x00300030
  59#define BIT_TIMEOUT             0x80000000
  60
  61/*-----------------------------------------------------------------------
  62 */
  63
  64ulong flash_init (void)
  65{
  66        int i, j;
  67        ulong size = 0;
  68
  69        for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; i++) {
  70                ulong flashbase = 0;
  71
  72                flash_info[i].flash_id =
  73                        (INTEL_MANUFACT     & FLASH_VENDMASK) |
  74                        (INTEL_ID_28F640J3A & FLASH_TYPEMASK);
  75                flash_info[i].size = FLASH_BANK_SIZE;
  76                flash_info[i].sector_count = CONFIG_SYS_MAX_FLASH_SECT;
  77                memset (flash_info[i].protect, 0, CONFIG_SYS_MAX_FLASH_SECT);
  78                if (i == 0)
  79                        flashbase = CONFIG_SYS_FLASH_BASE;
  80                else
  81                        panic ("configured too many flash banks!\n");
  82                for (j = 0; j < flash_info[i].sector_count; j++) {
  83                        flash_info[i].start[j] = flashbase;
  84
  85                        /* uniform sector size */
  86                        flashbase += MAIN_SECT_SIZE;
  87                }
  88                size += flash_info[i].size;
  89        }
  90
  91        /*
  92         * Protect monitor and environment sectors
  93         */
  94        flash_protect ( FLAG_PROTECT_SET,
  95                        CONFIG_SYS_FLASH_BASE,
  96                        CONFIG_SYS_FLASH_BASE + monitor_flash_len - 1,
  97                        &flash_info[0]);
  98
  99        flash_protect ( FLAG_PROTECT_SET,
 100                        CONFIG_ENV_ADDR,
 101                        CONFIG_ENV_ADDR + CONFIG_ENV_SECT_SIZE - 1, &flash_info[0]);
 102
 103#ifdef CONFIG_ENV_ADDR_REDUND
 104        flash_protect ( FLAG_PROTECT_SET,
 105                        CONFIG_ENV_ADDR_REDUND,
 106                        CONFIG_ENV_ADDR_REDUND + CONFIG_ENV_SECT_SIZE - 1,
 107                        &flash_info[0]);
 108#endif
 109
 110        return size;
 111}
 112
 113/*-----------------------------------------------------------------------
 114 */
 115void flash_print_info (flash_info_t * info)
 116{
 117        int i;
 118
 119        switch (info->flash_id & FLASH_VENDMASK) {
 120        case (INTEL_MANUFACT & FLASH_VENDMASK):
 121                printf ("Intel: ");
 122                break;
 123        default:
 124                printf ("Unknown Vendor ");
 125                break;
 126        }
 127
 128        switch (info->flash_id & FLASH_TYPEMASK) {
 129        case (INTEL_ID_28F640J3A & FLASH_TYPEMASK):
 130                printf ("2x 28F640J3A (64Mbit)\n");
 131                break;
 132        default:
 133                printf ("Unknown Chip Type\n");
 134                return;
 135                break;
 136        }
 137
 138        printf ("  Size: %ld MB in %d Sectors\n",
 139                        info->size >> 20, info->sector_count);
 140
 141        printf ("  Sector Start Addresses:");
 142        for (i = 0; i < info->sector_count; i++) {
 143                if ((i % 5) == 0) {
 144                        printf ("\n   ");
 145                }
 146                printf (" %08lX%s",
 147                        info->start[i],
 148                        info->protect[i] ? " (RO)" : "     ");
 149        }
 150        printf ("\n");
 151}
 152
 153/*-----------------------------------------------------------------------
 154 */
 155
 156int flash_error (ulong code)
 157{
 158        /* Check bit patterns */
 159        /* SR.7=0 is busy, SR.7=1 is ready */
 160        /* all other flags indicate error on 1 */
 161        /* SR.0 is undefined */
 162        /* Timeout is our faked flag */
 163
 164        /* sequence is described in Intel 290644-005 document */
 165
 166        /* check Timeout */
 167        if (code & BIT_TIMEOUT) {
 168                puts ("Timeout\n");
 169                return ERR_TIMOUT;
 170        }
 171
 172        /* check Busy, SR.7 */
 173        if (~code & BIT_BUSY) {
 174                puts ("Busy\n");
 175                return ERR_PROG_ERROR;
 176        }
 177
 178        /* check Vpp low, SR.3 */
 179        if (code & BIT_VPP_RANGE_ERROR) {
 180                puts ("Vpp range error\n");
 181                return ERR_PROG_ERROR;
 182        }
 183
 184        /* check Device Protect Error, SR.1 */
 185        if (code & BIT_PROTECT_ERROR) {
 186                puts ("Device protect error\n");
 187                return ERR_PROG_ERROR;
 188        }
 189
 190        /* check Command Seq Error, SR.4 & SR.5 */
 191        if (code & BIT_SEQUENCE_ERROR) {
 192                puts ("Command seqence error\n");
 193                return ERR_PROG_ERROR;
 194        }
 195
 196        /* check Block Erase Error, SR.5 */
 197        if (code & BIT_ERASE_ERROR) {
 198                puts ("Block erase error\n");
 199                return ERR_PROG_ERROR;
 200        }
 201
 202        /* check Program Error, SR.4 */
 203        if (code & BIT_PROGRAM_ERROR) {
 204                puts ("Program error\n");
 205                return ERR_PROG_ERROR;
 206        }
 207
 208        /* check Block Erase Suspended, SR.6 */
 209        if (code & BIT_ERASE_SUSPEND) {
 210                puts ("Block erase suspended\n");
 211                return ERR_PROG_ERROR;
 212        }
 213
 214        /* check Program Suspended, SR.2 */
 215        if (code & BIT_PROGRAM_SUSPEND) {
 216                puts ("Program suspended\n");
 217                return ERR_PROG_ERROR;
 218        }
 219
 220        /* OK, no error */
 221        return ERR_OK;
 222}
 223
 224/*-----------------------------------------------------------------------
 225 */
 226
 227int flash_erase (flash_info_t * info, int s_first, int s_last)
 228{
 229        ulong result, result1;
 230        int iflag, prot, sect;
 231        int rc = ERR_OK;
 232
 233#ifdef USE_920T_MMU
 234        int cflag;
 235#endif
 236
 237        debug ("flash_erase: s_first %d  s_last %d\n", s_first, s_last);
 238
 239        /* first look for protection bits */
 240
 241        if (info->flash_id == FLASH_UNKNOWN)
 242                return ERR_UNKNOWN_FLASH_TYPE;
 243
 244        if ((s_first < 0) || (s_first > s_last)) {
 245                return ERR_INVAL;
 246        }
 247
 248        if ((info->flash_id & FLASH_VENDMASK) !=
 249                (INTEL_MANUFACT & FLASH_VENDMASK)) {
 250                return ERR_UNKNOWN_FLASH_VENDOR;
 251        }
 252
 253        prot = 0;
 254        for (sect = s_first; sect <= s_last; ++sect) {
 255                if (info->protect[sect]) {
 256                        prot++;
 257                }
 258        }
 259
 260        if (prot) {
 261                printf ("- Warning: %d protected sectors will not be erased!\n",
 262                        prot);
 263        } else {
 264                printf ("\n");
 265        }
 266
 267        /*
 268         * Disable interrupts which might cause a timeout
 269         * here. Remember that our exception vectors are
 270         * at address 0 in the flash, and we don't want a
 271         * (ticker) exception to happen while the flash
 272         * chip is in programming mode.
 273         */
 274#ifdef USE_920T_MMU
 275        cflag = dcache_status ();
 276        dcache_disable ();
 277#endif
 278        iflag = disable_interrupts ();
 279
 280        /* Start erase on unprotected sectors */
 281        for (sect = s_first; sect <= s_last && !ctrlc (); sect++) {
 282
 283                debug ("Erasing sector %2d @ %08lX... ",
 284                        sect, info->start[sect]);
 285
 286                /* arm simple, non interrupt dependent timer */
 287                reset_timer_masked();
 288
 289                if (info->protect[sect] == 0) { /* not protected */
 290                        vu_long *addr = (vu_long *) (info->start[sect]);
 291                        ulong bsR7, bsR7_2, bsR5, bsR5_2;
 292
 293                        /* *addr = CMD_STATUS_RESET; */
 294                        *addr = CMD_ERASE_SETUP;
 295                        *addr = CMD_ERASE_CONFIRM;
 296
 297                        /* wait until flash is ready */
 298                        do {
 299                                /* check timeout */
 300                                if (get_timer_masked () > CONFIG_SYS_FLASH_ERASE_TOUT) {
 301                                        *addr = CMD_STATUS_RESET;
 302                                        result = BIT_TIMEOUT;
 303                                        break;
 304                                }
 305
 306                                *addr = CMD_STATUS_READ;
 307                                result = *addr;
 308                                bsR7 = result & (1 << 7);
 309                                bsR7_2 = result & (1 << 23);
 310                        } while (!bsR7 | !bsR7_2);
 311
 312                        *addr = CMD_STATUS_READ;
 313                        result1 = *addr;
 314                        bsR5 = result1 & (1 << 5);
 315                        bsR5_2 = result1 & (1 << 21);
 316#ifdef SAMSUNG_FLASH_DEBUG
 317                        printf ("bsR5 %lx bsR5_2 %lx\n", bsR5, bsR5_2);
 318                        if (bsR5 != 0 && bsR5_2 != 0)
 319                                printf ("bsR5 %lx bsR5_2 %lx\n", bsR5, bsR5_2);
 320#endif
 321
 322                        *addr = CMD_READ_ARRAY;
 323                        *addr = CMD_RESUME;
 324
 325                        if ((rc = flash_error (result)) != ERR_OK)
 326                                goto outahere;
 327#if 0
 328                        printf ("ok.\n");
 329                } else {                /* it was protected */
 330
 331                        printf ("protected!\n");
 332#endif
 333                }
 334        }
 335
 336outahere:
 337        /* allow flash to settle - wait 10 ms */
 338        udelay_masked (10000);
 339
 340        if (iflag)
 341                enable_interrupts ();
 342
 343#ifdef USE_920T_MMU
 344        if (cflag)
 345                dcache_enable ();
 346#endif
 347        return rc;
 348}
 349
 350/*-----------------------------------------------------------------------
 351 * Copy memory to flash
 352 */
 353
 354static int write_word (flash_info_t * info, ulong dest, ulong data)
 355{
 356        vu_long *addr = (vu_long *) dest;
 357        ulong result;
 358        int rc = ERR_OK;
 359        int iflag;
 360
 361#ifdef USE_920T_MMU
 362        int cflag;
 363#endif
 364
 365        /*
 366         * Check if Flash is (sufficiently) erased
 367         */
 368        result = *addr;
 369        if ((result & data) != data)
 370                return ERR_NOT_ERASED;
 371
 372        /*
 373         * Disable interrupts which might cause a timeout
 374         * here. Remember that our exception vectors are
 375         * at address 0 in the flash, and we don't want a
 376         * (ticker) exception to happen while the flash
 377         * chip is in programming mode.
 378         */
 379#ifdef USE_920T_MMU
 380        cflag = dcache_status ();
 381        dcache_disable ();
 382#endif
 383        iflag = disable_interrupts ();
 384
 385        /* *addr = CMD_STATUS_RESET; */
 386        *addr = CMD_PROGRAM;
 387        *addr = data;
 388
 389        /* arm simple, non interrupt dependent timer */
 390        reset_timer_masked ();
 391
 392        /* wait until flash is ready */
 393        do {
 394                /* check timeout */
 395                if (get_timer_masked () > CONFIG_SYS_FLASH_ERASE_TOUT) {
 396                        *addr = CMD_SUSPEND;
 397                        result = BIT_TIMEOUT;
 398                        break;
 399                }
 400
 401                *addr = CMD_STATUS_READ;
 402                result = *addr;
 403        } while (~result & BIT_BUSY);
 404
 405        /* *addr = CMD_READ_ARRAY; */
 406        *addr = CMD_STATUS_READ;
 407        result = *addr;
 408
 409        rc = flash_error (result);
 410
 411        if (iflag)
 412                enable_interrupts ();
 413
 414#ifdef USE_920T_MMU
 415        if (cflag)
 416                dcache_enable ();
 417#endif
 418        *addr = CMD_READ_ARRAY;
 419        *addr = CMD_RESUME;
 420        return rc;
 421}
 422
 423/*-----------------------------------------------------------------------
 424 * Copy memory to flash.
 425 */
 426
 427int write_buff (flash_info_t * info, uchar * src, ulong addr, ulong cnt)
 428{
 429        ulong cp, wp, data;
 430        int l;
 431        int i, rc;
 432
 433        wp = (addr & ~3);                       /* get lower word aligned address */
 434
 435        /*
 436         * handle unaligned start bytes
 437         */
 438        if ((l = addr - wp) != 0) {
 439                data = 0;
 440                for (i = 0, cp = wp; i < l; ++i, ++cp) {
 441                        data = (data >> 8) | (*(uchar *) cp << 24);
 442                }
 443                for (; i < 4 && cnt > 0; ++i) {
 444                        data = (data >> 8) | (*src++ << 24);
 445                        --cnt;
 446                        ++cp;
 447                }
 448                for (; cnt == 0 && i < 4; ++i, ++cp) {
 449                        data = (data >> 8) | (*(uchar *) cp << 24);
 450                }
 451
 452                if ((rc = write_word (info, wp, data)) != 0) {
 453                        return (rc);
 454                }
 455                wp += 4;
 456        }
 457
 458        /*
 459         * handle word aligned part
 460         */
 461        while (cnt >= 4) {
 462                data = *((vu_long *) src);
 463                if ((rc = write_word (info, wp, data)) != 0) {
 464                        return (rc);
 465                }
 466                src += 4;
 467                wp += 4;
 468                cnt -= 4;
 469        }
 470
 471        if (cnt == 0) {
 472                return ERR_OK;
 473        }
 474
 475        /*
 476         * handle unaligned tail bytes
 477         */
 478        data = 0;
 479        for (i = 0, cp = wp; i < 4 && cnt > 0; ++i, ++cp) {
 480                data = (data >> 8) | (*src++ << 24);
 481                --cnt;
 482        }
 483        for (; i < 4; ++i, ++cp) {
 484                data = (data >> 8) | (*(uchar *) cp << 24);
 485        }
 486
 487        return write_word (info, wp, data);
 488}
 489