qemu/roms/u-boot/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 j, k;
  60
  61         if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_SST) {
  62
  63                 info->start[0] = base;
  64                 for (k = 0, j = 0; j < CONFIG_SYS_SST_SECT; j++, k++) {
  65                         info->start[k + 1] = info->start[k] + CONFIG_SYS_SST_SECTSZ;
  66                         info->protect[k] = 0;
  67                 }
  68         }
  69
  70         return ERR_OK;
  71 }
  72
  73 void flash_print_info(flash_info_t * info)
  74 {
  75         int i;
  76
  77         switch (info->flash_id & FLASH_VENDMASK) {
  78         case FLASH_MAN_SST:
  79                 printf("SST ");
  80                 break;
  81         default:
  82                 printf("Unknown Vendor ");
  83                 break;
  84         }
  85
  86         switch (info->flash_id & FLASH_TYPEMASK) {
  87         case FLASH_SST6401B:
  88                 printf("SST39VF6401B\n");
  89                 break;
  90         default:
  91                 printf("Unknown Chip Type\n");
  92                 return;
  93         }
  94
  95         if (info->size > 0x100000) {
  96                 int remainder;
  97
  98                 printf("  Size: %ld", info->size >> 20);
  99
 100                 remainder = (info->size % 0x100000);
 101                 if (remainder) {
 102                         remainder >>= 10;
 103                         remainder = (int)((float)
 104                                           (((float)remainder / (float)1024) *
 105                                            10000));
 106                         printf(".%d ", remainder);
 107                 }
 108
 109                 printf("MB in %d Sectors\n", info->sector_count);
 110         } else
 111                 printf("  Size: %ld KB in %d Sectors\n",
 112                        info->size >> 10, info->sector_count);
 113
 114         printf("  Sector Start Addresses:");
 115         for (i = 0; i < info->sector_count; ++i) {
 116                 if ((i % 5) == 0)
 117                         printf("\n   ");
 118                 printf(" %08lX%s",
 119                        info->start[i], info->protect[i] ? " (RO)" : "     ");
 120         }
 121         printf("\n");
 122 }
 123
 124 /*
 125  * The following code cannot be run from FLASH!
 126  */
 127 ulong flash_get_size(FPWV * addr, flash_info_t * info)
 128 {
 129         u16 value;
 130
 131         addr[FLASH_CYCLE1] = (FPWV) 0x00AA00AA; /* for Atmel, Intel ignores this */
 132         addr[FLASH_CYCLE2] = (FPWV) 0x00550055; /* for Atmel, Intel ignores this */
 133         addr[FLASH_CYCLE1] = (FPWV) 0x00900090; /* selects Intel or Atmel */
 134
 135         switch (addr[0] & 0xffff) {
 136         case (u8) SST_MANUFACT:
 137                 info->flash_id = FLASH_MAN_SST;
 138                 value = addr[1];
 139                 break;
 140         default:
 141                 printf("Unknown Flash\n");
 142                 info->flash_id = FLASH_UNKNOWN;
 143                 info->sector_count = 0;
 144                 info->size = 0;
 145
 146                 *addr = (FPW) 0x00F000F0;
 147                 return (0);     /* no or unknown flash  */
 148         }
 149
 150         switch (value) {
 151         case (u16) SST_ID_xF6401B:
 152                 info->flash_id += FLASH_SST6401B;
 153                 break;
 154         default:
 155                 info->flash_id = FLASH_UNKNOWN;
 156                 break;
 157         }
 158
 159         info->sector_count = 0;
 160         info->size = 0;
 161         info->sector_count = CONFIG_SYS_SST_SECT;
 162         info->size = CONFIG_SYS_SST_SECT * CONFIG_SYS_SST_SECTSZ;
 163
 164         /* reset ID mode */
 165         *addr = (FPWV) 0x00F000F0;
 166
 167         if (info->sector_count > CONFIG_SYS_MAX_FLASH_SECT) {
 168                 printf("** ERROR: sector count %d > max (%d) **\n",
 169                        info->sector_count, CONFIG_SYS_MAX_FLASH_SECT);
 170                 info->sector_count = CONFIG_SYS_MAX_FLASH_SECT;
 171         }
 172
 173         return (info->size);
 174 }
 175
 176 int flash_erase(flash_info_t * info, int s_first, int s_last)
 177 {
 178         FPWV *addr;
 179         int flag, prot, sect, count;
 180         ulong type, start, last;
 181         int rcode = 0, flashtype = 0;
 182
 183         if ((s_first < 0) || (s_first > s_last)) {
 184                 if (info->flash_id == FLASH_UNKNOWN)
 185                         printf("- missing\n");
 186                 else
 187                         printf("- no sectors to erase\n");
 188                 return 1;
 189         }
 190
 191         type = (info->flash_id & FLASH_VENDMASK);
 192
 193         switch (type) {
 194         case FLASH_MAN_SST:
 195                 flashtype = 1;
 196                 break;
 197         default:
 198                 type = (info->flash_id & FLASH_VENDMASK);
 199                 printf("Can't erase unknown flash type %08lx - aborted\n",
 200                        info->flash_id);
 201                 return 1;
 202         }
 203
 204         prot = 0;
 205         for (sect = s_first; sect <= s_last; ++sect) {
 206                 if (info->protect[sect]) {
 207                         prot++;
 208                 }
 209         }
 210
 211         if (prot)
 212                 printf("- Warning: %d protected sectors will not be erased!\n",
 213                        prot);
 214         else
 215                 printf("\n");
 216
 217         flag = disable_interrupts();
 218
 219         start = get_timer(0);
 220         last = start;
 221
 222         if ((s_last - s_first) == (CONFIG_SYS_SST_SECT - 1)) {
 223                 if (prot == 0) {
 224                         addr = (FPWV *) info->start[0];
 225
 226                         addr[FLASH_CYCLE1] = 0x00AA;    /* unlock */
 227                         addr[FLASH_CYCLE2] = 0x0055;    /* unlock */
 228                         addr[FLASH_CYCLE1] = 0x0080;    /* erase mode */
 229                         addr[FLASH_CYCLE1] = 0x00AA;    /* unlock */
 230                         addr[FLASH_CYCLE2] = 0x0055;    /* unlock */
 231                         *addr = 0x0030; /* erase chip */
 232
 233                         count = 0;
 234                         start = get_timer(0);
 235
 236                         while ((*addr & 0x0080) != 0x0080) {
 237                                 if (count++ > 0x10000) {
 238                                         spin_wheel();
 239                                         count = 0;
 240                                 }
 241
 242                                 if (get_timer(start) > CONFIG_SYS_FLASH_ERASE_TOUT) {
 243                                         printf("Timeout\n");
 244                                         *addr = 0x00F0; /* reset to read mode */
 245
 246                                         return 1;
 247                                 }
 248                         }
 249
 250                         *addr = 0x00F0; /* reset to read mode */
 251
 252                         printf("\b. done\n");
 253
 254                         if (flag)
 255                                 enable_interrupts();
 256
 257                         return 0;
 258                 } else if (prot == CONFIG_SYS_SST_SECT) {
 259                         return 1;
 260                 }
 261         }
 262
 263         /* Start erase on unprotected sectors */
 264         for (sect = s_first; sect <= s_last; sect++) {
 265                 if (info->protect[sect] == 0) { /* not protected */
 266
 267                         addr = (FPWV *) (info->start[sect]);
 268
 269                         printf(".");
 270
 271                         /* arm simple, non interrupt dependent timer */
 272                         start = get_timer(0);
 273
 274                         switch (flashtype) {
 275                         case 1:
 276                                 {
 277                                         FPWV *base;     /* first address in bank */
 278
 279                                         flag = disable_interrupts();
 280
 281                                         base = (FPWV *) (CONFIG_SYS_FLASH_BASE);        /* First sector */
 282
 283                                         base[FLASH_CYCLE1] = 0x00AA;    /* unlock */
 284                                         base[FLASH_CYCLE2] = 0x0055;    /* unlock */
 285                                         base[FLASH_CYCLE1] = 0x0080;    /* erase mode */
 286                                         base[FLASH_CYCLE1] = 0x00AA;    /* unlock */
 287                                         base[FLASH_CYCLE2] = 0x0055;    /* unlock */
 288                                         *addr = 0x0050; /* erase sector */
 289
 290                                         if (flag)
 291                                                 enable_interrupts();
 292
 293                                         while ((*addr & 0x0080) != 0x0080) {
 294                                                 if (get_timer(start) >
 295                                                     CONFIG_SYS_FLASH_ERASE_TOUT) {
 296                                                         printf("Timeout\n");
 297                                                         *addr = 0x00F0; /* reset to read mode */
 298
 299                                                         rcode = 1;
 300                                                         break;
 301                                                 }
 302                                         }
 303
 304                                         *addr = 0x00F0; /* reset to read mode */
 305                                         break;
 306                                 }
 307                         }       /* switch (flashtype) */
 308                 }
 309         }
 310         printf(" done\n");
 311
 312         if (flag)
 313                 enable_interrupts();
 314
 315         return rcode;
 316 }
 317
 318 int write_buff(flash_info_t * info, uchar * src, ulong addr, ulong cnt)
 319 {
 320         ulong wp, count;
 321         u16 data;
 322         int rc, port_width;
 323
 324         if (info->flash_id == FLASH_UNKNOWN)
 325                 return 4;
 326
 327         /* get lower word aligned address */
 328         wp = addr;
 329         port_width = sizeof(FPW);
 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