board/freescale/m5253demo/flash.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * (C) Copyright 2000-2003
   4  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   5  *
   6  * Copyright (C) 2004-2007 Freescale Semiconductor, Inc.
   7  * TsiChung Liew (Tsi-Chung.Liew@freescale.com)
   8  */
   9
  10 #include <common.h>
  11 #include <flash.h>
  12 #include <init.h>
  13 #include <irq_func.h>
  14
  15 #include <asm/immap.h>
  16
  17 #ifndef CONFIG_SYS_FLASH_CFI
  18 typedef unsigned short FLASH_PORT_WIDTH;
  19 typedef volatile unsigned short FLASH_PORT_WIDTHV;
  20
  21 #define FPW             FLASH_PORT_WIDTH
  22 #define FPWV            FLASH_PORT_WIDTHV
  23
  24 #define FLASH_CYCLE1    0x5555
  25 #define FLASH_CYCLE2    0x2aaa
  26
  27 #define SYNC                    __asm__("nop")
  28
  29 /*-----------------------------------------------------------------------
  30  * Functions
  31  */
  32
  33 ulong flash_get_size(FPWV * addr, flash_info_t * info);
  34 int flash_get_offsets(ulong base, flash_info_t * info);
  35 int write_word(flash_info_t * info, FPWV * dest, u16 data);
  36 static inline void spin_wheel(void);
  37
  38 flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS];
  39
  40 ulong flash_init(void)
  41 {
  42         ulong size = 0;
  43         ulong fbase = 0;
  44
  45         fbase = (ulong) CONFIG_SYS_FLASH_BASE;
  46         flash_get_size((FPWV *) fbase, &flash_info[0]);
  47         flash_get_offsets((ulong) fbase, &flash_info[0]);
  48         fbase += flash_info[0].size;
  49         size += flash_info[0].size;
  50
  51         /* Protect monitor and environment sectors */
  52         flash_protect(FLAG_PROTECT_SET,
  53                       CONFIG_SYS_MONITOR_BASE,
  54                       CONFIG_SYS_MONITOR_BASE + monitor_flash_len - 1, &flash_info[0]);
  55
  56         return size;
  57 }
  58
  59 int flash_get_offsets(ulong base, flash_info_t * info)
  60 {
  61         int i;
  62
  63         if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_SST) {
  64
  65                 info->start[0] = base;
  66                 info->protect[0] = 0;
  67                 for (i = 1; i < CONFIG_SYS_SST_SECT; i++) {
  68                         info->start[i] = info->start[i - 1]
  69                                                 + CONFIG_SYS_SST_SECTSZ;
  70                         info->protect[i] = 0;
  71                 }
  72         }
  73
  74         return ERR_OK;
  75 }
  76
  77 void flash_print_info(flash_info_t * info)
  78 {
  79         int i;
  80
  81         switch (info->flash_id & FLASH_VENDMASK) {
  82         case FLASH_MAN_SST:
  83                 printf("SST ");
  84                 break;
  85         default:
  86                 printf("Unknown Vendor ");
  87                 break;
  88         }
  89
  90         switch (info->flash_id & FLASH_TYPEMASK) {
  91         case FLASH_SST6401B:
  92                 printf("SST39VF6401B\n");
  93                 break;
  94         default:
  95                 printf("Unknown Chip Type\n");
  96                 return;
  97         }
  98
  99         if (info->size > 0x100000) {
 100                 int remainder;
 101
 102                 printf("  Size: %ld", info->size >> 20);
 103
 104                 remainder = (info->size % 0x100000);
 105                 if (remainder) {
 106                         remainder >>= 10;
 107                         remainder = (int)((float)
 108                                           (((float)remainder / (float)1024) *
 109                                            10000));
 110                         printf(".%d ", remainder);
 111                 }
 112
 113                 printf("MB in %d Sectors\n", info->sector_count);
 114         } else
 115                 printf("  Size: %ld KB in %d Sectors\n",
 116                        info->size >> 10, info->sector_count);
 117
 118         printf("  Sector Start Addresses:");
 119         for (i = 0; i < info->sector_count; ++i) {
 120                 if ((i % 5) == 0)
 121                         printf("\n   ");
 122                 printf(" %08lX%s",
 123                        info->start[i], info->protect[i] ? " (RO)" : "     ");
 124         }
 125         printf("\n");
 126 }
 127
 128 /*
 129  * The following code cannot be run from FLASH!
 130  */
 131 ulong flash_get_size(FPWV * addr, flash_info_t * info)
 132 {
 133         u16 value;
 134
 135         addr[FLASH_CYCLE1] = (FPWV) 0x00AA00AA; /* for Atmel, Intel ignores this */
 136         addr[FLASH_CYCLE2] = (FPWV) 0x00550055; /* for Atmel, Intel ignores this */
 137         addr[FLASH_CYCLE1] = (FPWV) 0x00900090; /* selects Intel or Atmel */
 138
 139         switch (addr[0] & 0xffff) {
 140         case (u8) SST_MANUFACT:
 141                 info->flash_id = FLASH_MAN_SST;
 142                 value = addr[1];
 143                 break;
 144         default:
 145                 printf("Unknown Flash\n");
 146                 info->flash_id = FLASH_UNKNOWN;
 147                 info->sector_count = 0;
 148                 info->size = 0;
 149
 150                 *addr = (FPW) 0x00F000F0;
 151                 return (0);     /* no or unknown flash  */
 152         }
 153
 154         switch (value) {
 155         case (u16) SST_ID_xF6401B:
 156                 info->flash_id += FLASH_SST6401B;
 157                 break;
 158         default:
 159                 info->flash_id = FLASH_UNKNOWN;
 160                 break;
 161         }
 162
 163         info->sector_count = 0;
 164         info->size = 0;
 165         info->sector_count = CONFIG_SYS_SST_SECT;
 166         info->size = CONFIG_SYS_SST_SECT * CONFIG_SYS_SST_SECTSZ;
 167
 168         /* reset ID mode */
 169         *addr = (FPWV) 0x00F000F0;
 170
 171         if (info->sector_count > CONFIG_SYS_MAX_FLASH_SECT) {
 172                 printf("** ERROR: sector count %d > max (%d) **\n",
 173                        info->sector_count, CONFIG_SYS_MAX_FLASH_SECT);
 174                 info->sector_count = CONFIG_SYS_MAX_FLASH_SECT;
 175         }
 176
 177         return (info->size);
 178 }
 179
 180 int flash_erase(flash_info_t * info, int s_first, int s_last)
 181 {
 182         FPWV *addr;
 183         int flag, prot, sect, count;
 184         ulong type, start;
 185         int rcode = 0, flashtype = 0;
 186
 187         if ((s_first < 0) || (s_first > s_last)) {
 188                 if (info->flash_id == FLASH_UNKNOWN)
 189                         printf("- missing\n");
 190                 else
 191                         printf("- no sectors to erase\n");
 192                 return 1;
 193         }
 194
 195         type = (info->flash_id & FLASH_VENDMASK);
 196
 197         switch (type) {
 198         case FLASH_MAN_SST:
 199                 flashtype = 1;
 200                 break;
 201         default:
 202                 type = (info->flash_id & FLASH_VENDMASK);
 203                 printf("Can't erase unknown flash type %08lx - aborted\n",
 204                        info->flash_id);
 205                 return 1;
 206         }
 207
 208         prot = 0;
 209         for (sect = s_first; sect <= s_last; ++sect) {
 210                 if (info->protect[sect]) {
 211                         prot++;
 212                 }
 213         }
 214
 215         if (prot)
 216                 printf("- Warning: %d protected sectors will not be erased!\n",
 217                        prot);
 218         else
 219                 printf("\n");
 220
 221         flag = disable_interrupts();
 222
 223         start = get_timer(0);
 224
 225         if ((s_last - s_first) == (CONFIG_SYS_SST_SECT - 1)) {
 226                 if (prot == 0) {
 227                         addr = (FPWV *) info->start[0];
 228
 229                         addr[FLASH_CYCLE1] = 0x00AA;    /* unlock */
 230                         addr[FLASH_CYCLE2] = 0x0055;    /* unlock */
 231                         addr[FLASH_CYCLE1] = 0x0080;    /* erase mode */
 232                         addr[FLASH_CYCLE1] = 0x00AA;    /* unlock */
 233                         addr[FLASH_CYCLE2] = 0x0055;    /* unlock */
 234                         *addr = 0x0030; /* erase chip */
 235
 236                         count = 0;
 237                         start = get_timer(0);
 238
 239                         while ((*addr & 0x0080) != 0x0080) {
 240                                 if (count++ > 0x10000) {
 241                                         spin_wheel();
 242                                         count = 0;
 243                                 }
 244
 245                                 /* check timeout, 1000ms */
 246                                 if (get_timer(start) > 1000) {
 247                                         printf("Timeout\n");
 248                                         *addr = 0x00F0; /* reset to read mode */
 249
 250                                         return 1;
 251                                 }
 252                         }
 253
 254                         *addr = 0x00F0; /* reset to read mode */
 255
 256                         printf("\b. done\n");
 257
 258                         if (flag)
 259                                 enable_interrupts();
 260
 261                         return 0;
 262                 } else if (prot == CONFIG_SYS_SST_SECT) {
 263                         return 1;
 264                 }
 265         }
 266
 267         /* Start erase on unprotected sectors */
 268         for (sect = s_first; sect <= s_last; sect++) {
 269                 if (info->protect[sect] == 0) { /* not protected */
 270
 271                         addr = (FPWV *) (info->start[sect]);
 272
 273                         printf(".");
 274
 275                         /* arm simple, non interrupt dependent timer */
 276                         start = get_timer(0);
 277
 278                         switch (flashtype) {
 279                         case 1:
 280                                 {
 281                                         FPWV *base;     /* first address in bank */
 282
 283                                         flag = disable_interrupts();
 284
 285                                         base = (FPWV *) (CONFIG_SYS_FLASH_BASE);        /* First sector */
 286
 287                                         base[FLASH_CYCLE1] = 0x00AA;    /* unlock */
 288                                         base[FLASH_CYCLE2] = 0x0055;    /* unlock */
 289                                         base[FLASH_CYCLE1] = 0x0080;    /* erase mode */
 290                                         base[FLASH_CYCLE1] = 0x00AA;    /* unlock */
 291                                         base[FLASH_CYCLE2] = 0x0055;    /* unlock */
 292                                         *addr = 0x0050; /* erase sector */
 293
 294                                         if (flag)
 295                                                 enable_interrupts();
 296
 297                                         while ((*addr & 0x0080) != 0x0080) {
 298                                                 /* check timeout, 1000ms */
 299                                                 if (get_timer(start) > 1000) {
 300                                                         printf("Timeout\n");
 301                                                         *addr = 0x00F0; /* reset to read mode */
 302
 303                                                         rcode = 1;
 304                                                         break;
 305                                                 }
 306                                         }
 307
 308                                         *addr = 0x00F0; /* reset to read mode */
 309                                         break;
 310                                 }
 311                         }       /* switch (flashtype) */
 312                 }
 313         }
 314         printf(" done\n");
 315
 316         if (flag)
 317                 enable_interrupts();
 318
 319         return rcode;
 320 }
 321
 322 int write_buff(flash_info_t * info, uchar * src, ulong addr, ulong cnt)
 323 {
 324         ulong wp, count;
 325         u16 data;
 326         int rc;
 327
 328         if (info->flash_id == FLASH_UNKNOWN)
 329                 return 4;
 330
 331         /* get lower word aligned address */
 332         wp = addr;
 333
 334         /* handle unaligned start bytes */
 335         if (wp & 1) {
 336                 data = *((FPWV *) wp);
 337                 data = (data << 8) | *src;
 338
 339                 if ((rc = write_word(info, (FPWV *) wp, data)) != 0)
 340                         return (rc);
 341
 342                 wp++;
 343                 cnt -= 1;
 344                 src++;
 345         }
 346
 347         while (cnt >= 2) {
 348                 /*
 349                  * handle word aligned part
 350                  */
 351                 count = 0;
 352                 data = *((FPWV *) src);
 353
 354                 if ((rc = write_word(info, (FPWV *) wp, data)) != 0)
 355                         return (rc);
 356
 357                 wp += 2;
 358                 src += 2;
 359                 cnt -= 2;
 360
 361                 if (count++ > 0x800) {
 362                         spin_wheel();
 363                         count = 0;
 364                 }
 365         }
 366         /* handle word aligned part */
 367         if (cnt) {
 368                 /* handle word aligned part */
 369                 count = 0;
 370                 data = *((FPWV *) wp);
 371
 372                 data = (data & 0x00FF) | (*src << 8);
 373
 374                 if ((rc = write_word(info, (FPWV *) wp, data)) != 0)
 375                         return (rc);
 376
 377                 wp++;
 378                 src++;
 379                 cnt -= 1;
 380                 if (count++ > 0x800) {
 381                         spin_wheel();
 382                         count = 0;
 383                 }
 384         }
 385
 386         if (cnt == 0)
 387                 return ERR_OK;
 388
 389         return ERR_OK;
 390 }
 391
 392 /*-----------------------------------------------------------------------
 393  * Write a word to Flash
 394  * A word is 16 bits, whichever the bus width of the flash bank
 395  * (not an individual chip) is.
 396  *
 397  * returns:
 398  * 0 - OK
 399  * 1 - write timeout
 400  * 2 - Flash not erased
 401  */
 402 int write_word(flash_info_t * info, FPWV * dest, u16 data)
 403 {
 404         ulong start;
 405         int flag;
 406         int res = 0;            /* result, assume success */
 407         FPWV *base;             /* first address in flash bank */
 408
 409         /* Check if Flash is (sufficiently) erased */
 410         if ((*dest & (u8) data) != (u8) data) {
 411                 return (2);
 412         }
 413
 414         base = (FPWV *) (CONFIG_SYS_FLASH_BASE);
 415
 416         /* Disable interrupts which might cause a timeout here */
 417         flag = disable_interrupts();
 418
 419         base[FLASH_CYCLE1] = (u8) 0x00AA00AA;   /* unlock */
 420         base[FLASH_CYCLE2] = (u8) 0x00550055;   /* unlock */
 421         base[FLASH_CYCLE1] = (u8) 0x00A000A0;   /* selects program mode */
 422
 423         *dest = data;           /* start programming the data */
 424
 425         /* re-enable interrupts if necessary */
 426         if (flag)
 427                 enable_interrupts();
 428
 429         start = get_timer(0);
 430
 431         /* data polling for D7 */
 432         while (res == 0
 433                && (*dest & (u8) 0x00800080) != (data & (u8) 0x00800080)) {
 434                 /* check timeout, 500ms */
 435                 if (get_timer(start) > 500) {
 436                         *dest = (u8) 0x00F000F0;        /* reset bank */
 437                         res = 1;
 438                 }
 439         }
 440
 441         *dest++ = (u8) 0x00F000F0;      /* reset bank */
 442
 443         return (res);
 444 }
 445
 446 static inline void spin_wheel(void)
 447 {
 448         static int p = 0;
 449         static char w[] = "\\/-";
 450
 451         printf("\010%c", w[p]);
 452         (++p == 3) ? (p = 0) : 0;
 453 }
 454
 455 #endif