board/sl8245/flash.c

   1 /*
   2  * (C) Copyright 2001 - 2003
   3  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   4  *
   5  * See file CREDITS for list of people who contributed to this
   6  * project.
   7  *
   8  * This program is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU General Public License as
  10  * published by the Free Software Foundation; either version 2 of
  11  * the License, or (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  21  * MA 02111-1307 USA
  22  */
  23
  24 #include <common.h>
  25 #include <mpc824x.h>
  26 #include <asm/processor.h>
  27
  28 #if defined(CONFIG_ENV_IS_IN_FLASH)
  29 # ifndef  CONFIG_ENV_ADDR
  30 #  define CONFIG_ENV_ADDR       (CONFIG_SYS_FLASH_BASE + CONFIG_ENV_OFFSET)
  31 # endif
  32 # ifndef  CONFIG_ENV_SIZE
  33 #  define CONFIG_ENV_SIZE       CONFIG_ENV_SECT_SIZE
  34 # endif
  35 # ifndef  CONFIG_ENV_SECT_SIZE
  36 #  define CONFIG_ENV_SECT_SIZE  CONFIG_ENV_SIZE
  37 # endif
  38 #endif
  39
  40 #define FLASH_BANK_SIZE 0x800000
  41 #define MAIN_SECT_SIZE  0x40000
  42 #define PARAM_SECT1_SIZE 0x20000
  43 #define PARAM_SECT23_SIZE 0x8000
  44 #define PARAM_SECT4_SIZE 0x10000
  45
  46 flash_info_t    flash_info[CONFIG_SYS_MAX_FLASH_BANKS];
  47
  48 static int write_data (flash_info_t *info, ulong dest, ulong *data);
  49 static void write_via_fpu(vu_long *addr, ulong *data);
  50 static __inline__ unsigned long get_msr(void);
  51 static __inline__ void set_msr(unsigned long msr);
  52
  53 /*---------------------------------------------------------------------*/
  54 #undef  DEBUG_FLASH
  55
  56 /*---------------------------------------------------------------------*/
  57 #ifdef DEBUG_FLASH
  58 #define DEBUGF(fmt,args...) printf(fmt ,##args)
  59 #else
  60 #define DEBUGF(fmt,args...)
  61 #endif
  62 /*---------------------------------------------------------------------*/
  63
  64 #define __align__ __attribute__ ((aligned (8)))
  65 static __align__ ulong precmd0[2]   = { 0x00aa00aa, 0x00aa00aa };
  66 static __align__ ulong precmd1[2]   = { 0x00550055, 0x00550055 };
  67 static __align__ ulong cmdid[2]     = { 0x00900090, 0x00900090 };
  68 static __align__ ulong cmderase[2]  = { 0x00800080, 0x00800080 };
  69 static __align__ ulong cmdersusp[2] = { 0x00b000b0, 0x00b000b0 };
  70 static __align__ ulong cmdsecter[2] = { 0x00300030, 0x00300030 };
  71 static __align__ ulong cmdprog[2]   = { 0x00a000a0, 0x00a000a0 };
  72 static __align__ ulong cmdres[2]    = { 0x00f000f0, 0x00f000f0 };
  73
  74 /*-----------------------------------------------------------------------
  75  */
  76
  77 unsigned long flash_init (void)
  78 {
  79         int i, j;
  80         ulong size = 0;
  81
  82         for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; i++) {
  83                 vu_long *addr = (vu_long *) (CONFIG_SYS_FLASH_BASE + i * FLASH_BANK_SIZE);
  84
  85                 write_via_fpu (&addr[0xaaa], precmd0);
  86                 write_via_fpu (&addr[0x554], precmd1);
  87                 write_via_fpu (&addr[0xaaa], cmdid);
  88
  89                 DEBUGF ("Flash bank # %d:\n"
  90                         "\tManuf. ID @ 0x%08lX: 0x%08lX\n"
  91                         "\tDevice ID @ 0x%08lX: 0x%08lX\n",
  92                         i,
  93                         (ulong) (&addr[0]), addr[0],
  94                         (ulong) (&addr[2]), addr[2]);
  95
  96                 if ((addr[0] == addr[1]) && (addr[0] == AMD_MANUFACT) &&
  97                         (addr[2] == addr[3]) && (addr[2] == AMD_ID_LV160T)) {
  98                         flash_info[i].flash_id = (FLASH_MAN_AMD & FLASH_VENDMASK) |
  99                                         (FLASH_AM160T & FLASH_TYPEMASK);
 100                 } else {
 101                         flash_info[i].flash_id = FLASH_UNKNOWN;
 102                         write_via_fpu (addr, cmdres);
 103                         goto Done;
 104                 }
 105
 106                 DEBUGF ("flash_id = 0x%08lX\n", flash_info[i].flash_id);
 107
 108                 write_via_fpu (addr, cmdres);
 109
 110                 flash_info[i].size = FLASH_BANK_SIZE;
 111                 flash_info[i].sector_count = CONFIG_SYS_MAX_FLASH_SECT;
 112                 memset (flash_info[i].protect, 0, CONFIG_SYS_MAX_FLASH_SECT);
 113                 for (j = 0; j < 32; j++) {
 114                         flash_info[i].start[j] = CONFIG_SYS_FLASH_BASE +
 115                                         i * FLASH_BANK_SIZE + j * MAIN_SECT_SIZE;
 116                 }
 117                 flash_info[i].start[32] =
 118                                 flash_info[i].start[31] + PARAM_SECT1_SIZE;
 119                 flash_info[i].start[33] =
 120                                 flash_info[i].start[32] + PARAM_SECT23_SIZE;
 121                 flash_info[i].start[34] =
 122                                 flash_info[i].start[33] + PARAM_SECT23_SIZE;
 123                 size += flash_info[i].size;
 124         }
 125
 126         /* Protect monitor and environment sectors
 127          */
 128 #if CONFIG_SYS_MONITOR_BASE >= CONFIG_SYS_FLASH_BASE
 129 #if CONFIG_SYS_MONITOR_BASE >= CONFIG_SYS_FLASH_BASE + FLASH_BANK_SIZE
 130         flash_protect ( FLAG_PROTECT_SET,
 131                         CONFIG_SYS_MONITOR_BASE,
 132                         CONFIG_SYS_MONITOR_BASE + monitor_flash_len - 1,
 133                         &flash_info[1]);
 134 #else
 135         flash_protect ( FLAG_PROTECT_SET,
 136                         CONFIG_SYS_MONITOR_BASE,
 137                         CONFIG_SYS_MONITOR_BASE + monitor_flash_len - 1,
 138                         &flash_info[0]);
 139 #endif
 140 #endif
 141
 142 #if defined(CONFIG_ENV_IS_IN_FLASH) && defined(CONFIG_ENV_ADDR)
 143 #if CONFIG_ENV_ADDR >= CONFIG_SYS_FLASH_BASE + FLASH_BANK_SIZE
 144         flash_protect ( FLAG_PROTECT_SET,
 145                         CONFIG_ENV_ADDR,
 146                         CONFIG_ENV_ADDR + CONFIG_ENV_SIZE - 1, &flash_info[1]);
 147 #else
 148         flash_protect ( FLAG_PROTECT_SET,
 149                         CONFIG_ENV_ADDR,
 150                         CONFIG_ENV_ADDR + CONFIG_ENV_SIZE - 1, &flash_info[0]);
 151 #endif
 152 #endif
 153
 154 Done:
 155         return size;
 156 }
 157
 158 /*-----------------------------------------------------------------------
 159  */
 160 void flash_print_info (flash_info_t * info)
 161 {
 162         int i;
 163
 164         switch ((i = info->flash_id & FLASH_VENDMASK)) {
 165         case (FLASH_MAN_AMD & FLASH_VENDMASK):
 166                 printf ("Intel: ");
 167                 break;
 168         default:
 169                 printf ("Unknown Vendor 0x%04x ", i);
 170                 break;
 171         }
 172
 173         switch ((i = info->flash_id & FLASH_TYPEMASK)) {
 174         case (FLASH_AM160T & FLASH_TYPEMASK):
 175                 printf ("AM29LV160BT (16Mbit)\n");
 176                 break;
 177         default:
 178                 printf ("Unknown Chip Type 0x%04x\n", i);
 179                 goto Done;
 180                 break;
 181         }
 182
 183         printf ("  Size: %ld MB in %d Sectors\n",
 184                         info->size >> 20, info->sector_count);
 185
 186         printf ("  Sector Start Addresses:");
 187         for (i = 0; i < info->sector_count; i++) {
 188                 if ((i % 5) == 0) {
 189                         printf ("\n   ");
 190                 }
 191                 printf (" %08lX%s", info->start[i],
 192                         info->protect[i] ? " (RO)" : "     ");
 193         }
 194         printf ("\n");
 195
 196   Done:
 197         return;
 198 }
 199
 200 /*-----------------------------------------------------------------------
 201  */
 202
 203 int flash_erase (flash_info_t * info, int s_first, int s_last)
 204 {
 205         int flag, prot, sect;
 206         ulong start, now, last;
 207
 208         DEBUGF ("Erase flash bank %d sect %d ... %d\n",
 209                 info - &flash_info[0], s_first, s_last);
 210
 211         if ((s_first < 0) || (s_first > s_last)) {
 212                 if (info->flash_id == FLASH_UNKNOWN) {
 213                         printf ("- missing\n");
 214                 } else {
 215                         printf ("- no sectors to erase\n");
 216                 }
 217                 return 1;
 218         }
 219
 220         if ((info->flash_id & FLASH_VENDMASK) !=
 221                 (FLASH_MAN_AMD & FLASH_VENDMASK)) {
 222                 printf ("Can erase only AMD flash types - aborted\n");
 223                 return 1;
 224         }
 225
 226         prot = 0;
 227         for (sect = s_first; sect <= s_last; ++sect) {
 228                 if (info->protect[sect]) {
 229                         prot++;
 230                 }
 231         }
 232
 233         if (prot) {
 234                 printf ("- Warning: %d protected sectors will not be erased!\n",
 235                         prot);
 236         } else {
 237                 printf ("\n");
 238         }
 239
 240         start = get_timer (0);
 241         last = start;
 242         /* Start erase on unprotected sectors */
 243         for (sect = s_first; sect <= s_last; sect++) {
 244                 if (info->protect[sect] == 0) { /* not protected */
 245                         vu_long *addr = (vu_long *) (info->start[sect]);
 246
 247                         DEBUGF ("Erase sect %d @ 0x%08lX\n", sect, (ulong) addr);
 248
 249                         /* Disable interrupts which might cause a timeout
 250                          * here.
 251                          */
 252                         flag = disable_interrupts ();
 253
 254                         write_via_fpu (&addr[0xaaa], precmd0);
 255                         write_via_fpu (&addr[0x554], precmd1);
 256                         write_via_fpu (&addr[0xaaa], cmderase);
 257                         write_via_fpu (&addr[0xaaa], precmd0);
 258                         write_via_fpu (&addr[0x554], precmd1);
 259                         write_via_fpu (&addr[0xaaa], cmdsecter);
 260
 261                         /* re-enable interrupts if necessary */
 262                         if (flag)
 263                                 enable_interrupts ();
 264
 265                         /* wait at least 80us - let's wait 1 ms */
 266                         udelay (1000);
 267
 268                         while (((addr[0] & 0x00800080) != 0x00800080) ||
 269                                    ((addr[1] & 0x00800080) != 0x00800080)) {
 270                                 if ((now = get_timer (start)) > CONFIG_SYS_FLASH_ERASE_TOUT) {
 271                                         printf ("Timeout\n");
 272                                         write_via_fpu (addr, cmdersusp);
 273                                         write_via_fpu (addr, cmdres);
 274                                         return 1;
 275                                 }
 276
 277                                 /* show that we're waiting */
 278                                 if ((now - last) > 1000) {      /* every second  */
 279                                         putc ('.');
 280                                         last = now;
 281                                 }
 282                         }
 283
 284                         write_via_fpu (addr, cmdres);
 285                 }
 286         }
 287         printf (" done\n");
 288         return 0;
 289 }
 290
 291 /*-----------------------------------------------------------------------
 292  * Copy memory to flash, returns:
 293  * 0 - OK
 294  * 1 - write timeout
 295  * 2 - Flash not erased
 296  * 4 - Flash not identified
 297  */
 298
 299 #define FLASH_WIDTH     8               /* flash bus width in bytes */
 300
 301 int write_buff (flash_info_t * info, uchar * src, ulong addr, ulong cnt)
 302 {
 303         ulong wp, cp, msr;
 304         int l, rc, i;
 305         ulong data[2];
 306         ulong *datah = &data[0];
 307         ulong *datal = &data[1];
 308
 309         DEBUGF ("Flash write_buff: @ 0x%08lx, src 0x%08lx len %ld\n",
 310                 addr, (ulong) src, cnt);
 311
 312         if (info->flash_id == FLASH_UNKNOWN) {
 313                 return 4;
 314         }
 315
 316         msr = get_msr ();
 317         set_msr (msr | MSR_FP);
 318
 319         wp = (addr & ~(FLASH_WIDTH - 1));       /* get lower aligned address */
 320
 321         /*
 322          * handle unaligned start bytes
 323          */
 324         if ((l = addr - wp) != 0) {
 325                 *datah = *datal = 0;
 326
 327                 for (i = 0, cp = wp; i < l; i++, cp++) {
 328                         if (i >= 4) {
 329                                 *datah = (*datah << 8) | ((*datal & 0xFF000000) >> 24);
 330                         }
 331
 332                         *datal = (*datal << 8) | (*(uchar *) cp);
 333                 }
 334                 for (; i < FLASH_WIDTH && cnt > 0; ++i) {
 335                         char tmp;
 336
 337                         tmp = *src;
 338
 339                         src++;
 340
 341                         if (i >= 4) {
 342                                 *datah = (*datah << 8) | ((*datal & 0xFF000000) >> 24);
 343                         }
 344
 345                         *datal = (*datal << 8) | tmp;
 346
 347                         --cnt;
 348                         ++cp;
 349                 }
 350
 351                 for (; cnt == 0 && i < FLASH_WIDTH; ++i, ++cp) {
 352                         if (i >= 4) {
 353                                 *datah = (*datah << 8) | ((*datal & 0xFF000000) >> 24);
 354                         }
 355
 356                         *datal = (*datah << 8) | (*(uchar *) cp);
 357                 }
 358
 359                 if ((rc = write_data (info, wp, data)) != 0) {
 360                         set_msr (msr);
 361                         return (rc);
 362                 }
 363
 364                 wp += FLASH_WIDTH;
 365         }
 366
 367         /*
 368          * handle FLASH_WIDTH aligned part
 369          */
 370         while (cnt >= FLASH_WIDTH) {
 371                 *datah = *(ulong *) src;
 372                 *datal = *(ulong *) (src + 4);
 373                 if ((rc = write_data (info, wp, data)) != 0) {
 374                         set_msr (msr);
 375                         return (rc);
 376                 }
 377                 wp += FLASH_WIDTH;
 378                 cnt -= FLASH_WIDTH;
 379                 src += FLASH_WIDTH;
 380         }
 381
 382         if (cnt == 0) {
 383                 set_msr (msr);
 384                 return (0);
 385         }
 386
 387         /*
 388          * handle unaligned tail bytes
 389          */
 390         *datah = *datal = 0;
 391         for (i = 0, cp = wp; i < FLASH_WIDTH && cnt > 0; ++i, ++cp) {
 392                 char tmp;
 393
 394                 tmp = *src;
 395
 396                 src++;
 397
 398                 if (i >= 4) {
 399                         *datah = (*datah << 8) | ((*datal & 0xFF000000) >> 24);
 400                 }
 401
 402                 *datal = (*datal << 8) | tmp;
 403
 404                 --cnt;
 405         }
 406
 407         for (; i < FLASH_WIDTH; ++i, ++cp) {
 408                 if (i >= 4) {
 409                         *datah = (*datah << 8) | ((*datal & 0xFF000000) >> 24);
 410                 }
 411
 412                 *datal = (*datal << 8) | (*(uchar *) cp);
 413         }
 414
 415         rc = write_data (info, wp, data);
 416         set_msr (msr);
 417
 418         return (rc);
 419 }
 420
 421 /*-----------------------------------------------------------------------
 422  * Write a word to Flash, returns:
 423  * 0 - OK
 424  * 1 - write timeout
 425  * 2 - Flash not erased
 426  */
 427 static int write_data (flash_info_t * info, ulong dest, ulong * data)
 428 {
 429         vu_long *chip = (vu_long *) (info->start[0]);
 430         vu_long *addr = (vu_long *) dest;
 431         ulong start;
 432         int flag;
 433
 434         /* Check if Flash is (sufficiently) erased */
 435         if (((addr[0] & data[0]) != data[0]) ||
 436                 ((addr[1] & data[1]) != data[1])) {
 437                 return (2);
 438         }
 439         /* Disable interrupts which might cause a timeout here */
 440         flag = disable_interrupts ();
 441
 442         write_via_fpu (&chip[0xaaa], precmd0);
 443         write_via_fpu (&chip[0x554], precmd1);
 444         write_via_fpu (&chip[0xaaa], cmdprog);
 445         write_via_fpu (addr, data);
 446
 447         /* re-enable interrupts if necessary */
 448         if (flag)
 449                 enable_interrupts ();
 450
 451         start = get_timer (0);
 452
 453         while (((addr[0] & 0x00800080) != (data[0] & 0x00800080)) ||
 454                ((addr[1] & 0x00800080) != (data[1] & 0x00800080))) {
 455                 if (get_timer (start) > CONFIG_SYS_FLASH_WRITE_TOUT) {
 456                         write_via_fpu (chip, cmdres);
 457                         return (1);
 458                 }
 459         }
 460
 461         write_via_fpu (chip, cmdres);
 462
 463         return (0);
 464 }
 465
 466 /*-----------------------------------------------------------------------
 467  */
 468 static void write_via_fpu (vu_long * addr, ulong * data)
 469 {
 470         __asm__ __volatile__ ("lfd  1, 0(%0)"::"r" (data));
 471         __asm__ __volatile__ ("stfd 1, 0(%0)"::"r" (addr));
 472 }
 473
 474 /*-----------------------------------------------------------------------
 475  */
 476 static __inline__ unsigned long get_msr (void)
 477 {
 478         unsigned long msr;
 479
 480         __asm__ __volatile__ ("mfmsr %0":"=r" (msr):);
 481
 482         return msr;
 483 }
 484
 485 static __inline__ void set_msr (unsigned long msr)
 486 {
 487         __asm__ __volatile__ ("mtmsr %0"::"r" (msr));
 488 }