board/freescale/m5253demo/flash.c

   1 /*
   2  * (C) Copyright 2000-2003
   3  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   4  *
   5  * Copyright (C) 2004-2007 Freescale Semiconductor, Inc.
   6  * TsiChung Liew (Tsi-Chung.Liew@freescale.com)
   7  *
   8  * SPDX-License-Identifier:     GPL-2.0+
   9  */
  10
  11 #include <common.h>
  12
  13 #include <asm/immap.h>
  14
  15 #ifndef CONFIG_SYS_FLASH_CFI
  16 typedef unsigned short FLASH_PORT_WIDTH;
  17 typedef volatile unsigned short FLASH_PORT_WIDTHV;
  18
  19 #define FPW             FLASH_PORT_WIDTH
  20 #define FPWV            FLASH_PORT_WIDTHV
  21
  22 #define FLASH_CYCLE1    0x5555
  23 #define FLASH_CYCLE2    0x2aaa
  24
  25 #define SYNC                    __asm__("nop")
  26
  27 /*-----------------------------------------------------------------------
  28  * Functions
  29  */
  30
  31 ulong flash_get_size(FPWV * addr, flash_info_t * info);
  32 int flash_get_offsets(ulong base, flash_info_t * info);
  33 int write_word(flash_info_t * info, FPWV * dest, u16 data);
  34 void inline spin_wheel(void);
  35
  36 flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS];
  37
  38 ulong flash_init(void)
  39 {
  40         ulong size = 0;
  41         ulong fbase = 0;
  42
  43         fbase = (ulong) CONFIG_SYS_FLASH_BASE;
  44         flash_get_size((FPWV *) fbase, &flash_info[0]);
  45         flash_get_offsets((ulong) fbase, &flash_info[0]);
  46         fbase += flash_info[0].size;
  47         size += flash_info[0].size;
  48
  49         /* Protect monitor and environment sectors */
  50         flash_protect(FLAG_PROTECT_SET,
  51                       CONFIG_SYS_MONITOR_BASE,
  52                       CONFIG_SYS_MONITOR_BASE + monitor_flash_len - 1, &flash_info[0]);
  53
  54         return size;
  55 }
  56
  57 int flash_get_offsets(ulong base, flash_info_t * info)
  58 {
  59         int i;
  60
  61         if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_SST) {
  62
  63                 info->start[0] = base;
  64                 info->protect[0] = 0;
  65                 for (i = 1; i < CONFIG_SYS_SST_SECT; i++) {
  66                         info->start[i] = info->start[i - 1]
  67                                                 + CONFIG_SYS_SST_SECTSZ;
  68                         info->protect[i] = 0;
  69                 }
  70         }
  71
  72         return ERR_OK;
  73 }
  74
  75 void flash_print_info(flash_info_t * info)
  76 {
  77         int i;
  78
  79         switch (info->flash_id & FLASH_VENDMASK) {
  80         case FLASH_MAN_SST:
  81                 printf("SST ");
  82                 break;
  83         default:
  84                 printf("Unknown Vendor ");
  85                 break;
  86         }
  87
  88         switch (info->flash_id & FLASH_TYPEMASK) {
  89         case FLASH_SST6401B:
  90                 printf("SST39VF6401B\n");
  91                 break;
  92         default:
  93                 printf("Unknown Chip Type\n");
  94                 return;
  95         }
  96
  97         if (info->size > 0x100000) {
  98                 int remainder;
  99
 100                 printf("  Size: %ld", info->size >> 20);
 101
 102                 remainder = (info->size % 0x100000);
 103                 if (remainder) {
 104                         remainder >>= 10;
 105                         remainder = (int)((float)
 106                                           (((float)remainder / (float)1024) *
 107                                            10000));
 108                         printf(".%d ", remainder);
 109                 }
 110
 111                 printf("MB in %d Sectors\n", info->sector_count);
 112         } else
 113                 printf("  Size: %ld KB in %d Sectors\n",
 114                        info->size >> 10, info->sector_count);
 115
 116         printf("  Sector Start Addresses:");
 117         for (i = 0; i < info->sector_count; ++i) {
 118                 if ((i % 5) == 0)
 119                         printf("\n   ");
 120                 printf(" %08lX%s",
 121                        info->start[i], info->protect[i] ? " (RO)" : "     ");
 122         }
 123         printf("\n");
 124 }
 125
 126 /*
 127  * The following code cannot be run from FLASH!
 128  */
 129 ulong flash_get_size(FPWV * addr, flash_info_t * info)
 130 {
 131         u16 value;
 132
 133         addr[FLASH_CYCLE1] = (FPWV) 0x00AA00AA; /* for Atmel, Intel ignores this */
 134         addr[FLASH_CYCLE2] = (FPWV) 0x00550055; /* for Atmel, Intel ignores this */
 135         addr[FLASH_CYCLE1] = (FPWV) 0x00900090; /* selects Intel or Atmel */
 136
 137         switch (addr[0] & 0xffff) {
 138         case (u8) SST_MANUFACT:
 139                 info->flash_id = FLASH_MAN_SST;
 140                 value = addr[1];
 141                 break;
 142         default:
 143                 printf("Unknown Flash\n");
 144                 info->flash_id = FLASH_UNKNOWN;
 145                 info->sector_count = 0;
 146                 info->size = 0;
 147
 148                 *addr = (FPW) 0x00F000F0;
 149                 return (0);     /* no or unknown flash  */
 150         }
 151
 152         switch (value) {
 153         case (u16) SST_ID_xF6401B:
 154                 info->flash_id += FLASH_SST6401B;
 155                 break;
 156         default:
 157                 info->flash_id = FLASH_UNKNOWN;
 158                 break;
 159         }
 160
 161         info->sector_count = 0;
 162         info->size = 0;
 163         info->sector_count = CONFIG_SYS_SST_SECT;
 164         info->size = CONFIG_SYS_SST_SECT * CONFIG_SYS_SST_SECTSZ;
 165
 166         /* reset ID mode */
 167         *addr = (FPWV) 0x00F000F0;
 168
 169         if (info->sector_count > CONFIG_SYS_MAX_FLASH_SECT) {
 170                 printf("** ERROR: sector count %d > max (%d) **\n",
 171                        info->sector_count, CONFIG_SYS_MAX_FLASH_SECT);
 172                 info->sector_count = CONFIG_SYS_MAX_FLASH_SECT;
 173         }
 174
 175         return (info->size);
 176 }
 177
 178 int flash_erase(flash_info_t * info, int s_first, int s_last)
 179 {
 180         FPWV *addr;
 181         int flag, prot, sect, count;
 182         ulong type, start;
 183         int rcode = 0, flashtype = 0;
 184
 185         if ((s_first < 0) || (s_first > s_last)) {
 186                 if (info->flash_id == FLASH_UNKNOWN)
 187                         printf("- missing\n");
 188                 else
 189                         printf("- no sectors to erase\n");
 190                 return 1;
 191         }
 192
 193         type = (info->flash_id & FLASH_VENDMASK);
 194
 195         switch (type) {
 196         case FLASH_MAN_SST:
 197                 flashtype = 1;
 198                 break;
 199         default:
 200                 type = (info->flash_id & FLASH_VENDMASK);
 201                 printf("Can't erase unknown flash type %08lx - aborted\n",
 202                        info->flash_id);
 203                 return 1;
 204         }
 205
 206         prot = 0;
 207         for (sect = s_first; sect <= s_last; ++sect) {
 208                 if (info->protect[sect]) {
 209                         prot++;
 210                 }
 211         }
 212
 213         if (prot)
 214                 printf("- Warning: %d protected sectors will not be erased!\n",
 215                        prot);
 216         else
 217                 printf("\n");
 218
 219         flag = disable_interrupts();
 220
 221         start = get_timer(0);
 222
 223         if ((s_last - s_first) == (CONFIG_SYS_SST_SECT - 1)) {
 224                 if (prot == 0) {
 225                         addr = (FPWV *) info->start[0];
 226
 227                         addr[FLASH_CYCLE1] = 0x00AA;    /* unlock */
 228                         addr[FLASH_CYCLE2] = 0x0055;    /* unlock */
 229                         addr[FLASH_CYCLE1] = 0x0080;    /* erase mode */
 230                         addr[FLASH_CYCLE1] = 0x00AA;    /* unlock */
 231                         addr[FLASH_CYCLE2] = 0x0055;    /* unlock */
 232                         *addr = 0x0030; /* erase chip */
 233
 234                         count = 0;
 235                         start = get_timer(0);
 236
 237                         while ((*addr & 0x0080) != 0x0080) {
 238                                 if (count++ > 0x10000) {
 239                                         spin_wheel();
 240                                         count = 0;
 241                                 }
 242
 243                                 if (get_timer(start) > CONFIG_SYS_FLASH_ERASE_TOUT) {
 244                                         printf("Timeout\n");
 245                                         *addr = 0x00F0; /* reset to read mode */
 246
 247                                         return 1;
 248                                 }
 249                         }
 250
 251                         *addr = 0x00F0; /* reset to read mode */
 252
 253                         printf("\b. done\n");
 254
 255                         if (flag)
 256                                 enable_interrupts();
 257
 258                         return 0;
 259                 } else if (prot == CONFIG_SYS_SST_SECT) {
 260                         return 1;
 261                 }
 262         }
 263
 264         /* Start erase on unprotected sectors */
 265         for (sect = s_first; sect <= s_last; sect++) {
 266                 if (info->protect[sect] == 0) { /* not protected */
 267
 268                         addr = (FPWV *) (info->start[sect]);
 269
 270                         printf(".");
 271
 272                         /* arm simple, non interrupt dependent timer */
 273                         start = get_timer(0);
 274
 275                         switch (flashtype) {
 276                         case 1:
 277                                 {
 278                                         FPWV *base;     /* first address in bank */
 279
 280                                         flag = disable_interrupts();
 281
 282                                         base = (FPWV *) (CONFIG_SYS_FLASH_BASE);        /* First sector */
 283
 284                                         base[FLASH_CYCLE1] = 0x00AA;    /* unlock */
 285                                         base[FLASH_CYCLE2] = 0x0055;    /* unlock */
 286                                         base[FLASH_CYCLE1] = 0x0080;    /* erase mode */
 287                                         base[FLASH_CYCLE1] = 0x00AA;    /* unlock */
 288                                         base[FLASH_CYCLE2] = 0x0055;    /* unlock */
 289                                         *addr = 0x0050; /* erase sector */
 290
 291                                         if (flag)
 292                                                 enable_interrupts();
 293
 294                                         while ((*addr & 0x0080) != 0x0080) {
 295                                                 if (get_timer(start) >
 296                                                     CONFIG_SYS_FLASH_ERASE_TOUT) {
 297                                                         printf("Timeout\n");
 298                                                         *addr = 0x00F0; /* reset to read mode */
 299
 300                                                         rcode = 1;
 301                                                         break;
 302                                                 }
 303                                         }
 304
 305                                         *addr = 0x00F0; /* reset to read mode */
 306                                         break;
 307                                 }
 308                         }       /* switch (flashtype) */
 309                 }
 310         }
 311         printf(" done\n");
 312
 313         if (flag)
 314                 enable_interrupts();
 315
 316         return rcode;
 317 }
 318
 319 int write_buff(flash_info_t * info, uchar * src, ulong addr, ulong cnt)
 320 {
 321         ulong wp, count;
 322         u16 data;
 323         int rc;
 324
 325         if (info->flash_id == FLASH_UNKNOWN)
 326                 return 4;
 327
 328         /* get lower word aligned address */
 329         wp = addr;
 330
 331         /* handle unaligned start bytes */
 332         if (wp & 1) {
 333                 data = *((FPWV *) wp);
 334                 data = (data << 8) | *src;
 335
 336                 if ((rc = write_word(info, (FPWV *) wp, data)) != 0)
 337                         return (rc);
 338
 339                 wp++;
 340                 cnt -= 1;
 341                 src++;
 342         }
 343
 344         while (cnt >= 2) {
 345                 /*
 346                  * handle word aligned part
 347                  */
 348                 count = 0;
 349                 data = *((FPWV *) src);
 350
 351                 if ((rc = write_word(info, (FPWV *) wp, data)) != 0)
 352                         return (rc);
 353
 354                 wp += 2;
 355                 src += 2;
 356                 cnt -= 2;
 357
 358                 if (count++ > 0x800) {
 359                         spin_wheel();
 360                         count = 0;
 361                 }
 362         }
 363         /* handle word aligned part */
 364         if (cnt) {
 365                 /* handle word aligned part */
 366                 count = 0;
 367                 data = *((FPWV *) wp);
 368
 369                 data = (data & 0x00FF) | (*src << 8);
 370
 371                 if ((rc = write_word(info, (FPWV *) wp, data)) != 0)
 372                         return (rc);
 373
 374                 wp++;
 375                 src++;
 376                 cnt -= 1;
 377                 if (count++ > 0x800) {
 378                         spin_wheel();
 379                         count = 0;
 380                 }
 381         }
 382
 383         if (cnt == 0)
 384                 return ERR_OK;
 385
 386         return ERR_OK;
 387 }
 388
 389 /*-----------------------------------------------------------------------
 390  * Write a word to Flash
 391  * A word is 16 bits, whichever the bus width of the flash bank
 392  * (not an individual chip) is.
 393  *
 394  * returns:
 395  * 0 - OK
 396  * 1 - write timeout
 397  * 2 - Flash not erased
 398  */
 399 int write_word(flash_info_t * info, FPWV * dest, u16 data)
 400 {
 401         ulong start;
 402         int flag;
 403         int res = 0;            /* result, assume success */
 404         FPWV *base;             /* first address in flash bank */
 405
 406         /* Check if Flash is (sufficiently) erased */
 407         if ((*dest & (u8) data) != (u8) data) {
 408                 return (2);
 409         }
 410
 411         base = (FPWV *) (CONFIG_SYS_FLASH_BASE);
 412
 413         /* Disable interrupts which might cause a timeout here */
 414         flag = disable_interrupts();
 415
 416         base[FLASH_CYCLE1] = (u8) 0x00AA00AA;   /* unlock */
 417         base[FLASH_CYCLE2] = (u8) 0x00550055;   /* unlock */
 418         base[FLASH_CYCLE1] = (u8) 0x00A000A0;   /* selects program mode */
 419
 420         *dest = data;           /* start programming the data */
 421
 422         /* re-enable interrupts if necessary */
 423         if (flag)
 424                 enable_interrupts();
 425
 426         start = get_timer(0);
 427
 428         /* data polling for D7 */
 429         while (res == 0
 430                && (*dest & (u8) 0x00800080) != (data & (u8) 0x00800080)) {
 431                 if (get_timer(start) > CONFIG_SYS_FLASH_WRITE_TOUT) {
 432                         *dest = (u8) 0x00F000F0;        /* reset bank */
 433                         res = 1;
 434                 }
 435         }
 436
 437         *dest++ = (u8) 0x00F000F0;      /* reset bank */
 438
 439         return (res);
 440 }
 441
 442 void inline spin_wheel(void)
 443 {
 444         static int p = 0;
 445         static char w[] = "\\/-";
 446
 447         printf("\010%c", w[p]);
 448         (++p == 3) ? (p = 0) : 0;
 449 }
 450
 451 #endif