board/sc520_cdp/flash_old.c

   1 /*
   2  * (C) Copyright 2002
   3  * Daniel Engström, Omicron Ceti AB, daniel@omicron.se
   4  *
   5  * (C) Copyright 2002
   6  * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
   7  * Alex Zuepke <azu@sysgo.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 #include <common.h>
  29 #include <asm/io.h>
  30
  31 ulong myflush(void);
  32
  33
  34 #define SC520_MAX_FLASH_BANKS  3
  35 #define SC520_FLASH_BANK0_BASE 0x38000000  /* BOOTCS */
  36 #define SC520_FLASH_BANK1_BASE 0x30000000  /* ROMCS0 */
  37 #define SC520_FLASH_BANK2_BASE 0x28000000  /* ROMCS1 */
  38 #define SC520_FLASH_BANKSIZE   0x8000000
  39
  40 #define AMD29LV016_SIZE        0x200000
  41 #define AMD29LV016_SECTORS     32
  42
  43 flash_info_t    flash_info[SC520_MAX_FLASH_BANKS];
  44
  45 #define CMD_READ_ARRAY          0x00F000F0
  46 #define CMD_UNLOCK1             0x00AA00AA
  47 #define CMD_UNLOCK2             0x00550055
  48 #define CMD_ERASE_SETUP         0x00800080
  49 #define CMD_ERASE_CONFIRM       0x00300030
  50 #define CMD_PROGRAM             0x00A000A0
  51 #define CMD_UNLOCK_BYPASS       0x00200020
  52
  53
  54 #define BIT_ERASE_DONE          0x00800080
  55 #define BIT_RDY_MASK            0x00800080
  56 #define BIT_PROGRAM_ERROR       0x00200020
  57 #define BIT_TIMEOUT             0x80000000 /* our flag */
  58
  59 #define READY 1
  60 #define ERR   2
  61 #define TMO   4
  62
  63 /*-----------------------------------------------------------------------
  64  */
  65
  66 ulong flash_init(void)
  67 {
  68         int i, j;
  69         ulong size = 0;
  70
  71         for (i = 0; i < SC520_MAX_FLASH_BANKS; i++) {
  72                 ulong flashbase = 0;
  73                 int sectsize = 0;
  74                 if (i==0 || i==2) {
  75                         /* FixMe: this assumes that bank 0 and 2
  76                          * are mapped to the two 8Mb banks */
  77                         flash_info[i].flash_id =
  78                                 (AMD_MANUFACT & FLASH_VENDMASK) |
  79                                 (AMD_ID_LV016B & FLASH_TYPEMASK);
  80
  81                         flash_info[i].size = AMD29LV016_SIZE*4;
  82                         flash_info[i].sector_count = AMD29LV016_SECTORS;
  83                         sectsize = (AMD29LV016_SIZE*4)/AMD29LV016_SECTORS;
  84                 } else {
  85                         /* FixMe: this assumes that bank1 is unmapped
  86                          * (or mapped to the same flash bank as BOOTCS) */
  87                         flash_info[i].flash_id = 0;
  88                         flash_info[i].size = 0;
  89                         flash_info[i].sector_count = 0;
  90                         sectsize=0;
  91                 }
  92                 memset(flash_info[i].protect, 0, CFG_MAX_FLASH_SECT);
  93                 switch (i) {
  94                 case 0:
  95                         flashbase = SC520_FLASH_BANK0_BASE;
  96                         break;
  97                 case 1:
  98                         flashbase = SC520_FLASH_BANK1_BASE;
  99                         break;
 100                 case 2:
 101                         flashbase = SC520_FLASH_BANK0_BASE;
 102                         break;
 103                 default:
 104                         panic("configured too many flash banks!\n");
 105                 }
 106
 107                 for (j = 0; j < flash_info[i].sector_count; j++) {
 108                         flash_info[i].start[j] = sectsize;
 109                         flash_info[i].start[j] = flashbase + j * sectsize;
 110                 }
 111                 size += flash_info[i].size;
 112         }
 113
 114         /*
 115          * Protect monitor and environment sectors
 116          */
 117         flash_protect(FLAG_PROTECT_SET,
 118                       i386boot_start-SC520_FLASH_BANK0_BASE,
 119                       i386boot_end-SC520_FLASH_BANK0_BASE,
 120                       &flash_info[0]);
 121
 122 #ifdef CFG_ENV_ADDR
 123         flash_protect(FLAG_PROTECT_SET,
 124                       CFG_ENV_ADDR,
 125                       CFG_ENV_ADDR + CFG_ENV_SIZE - 1,
 126                       &flash_info[0]);
 127 #endif
 128         return size;
 129 }
 130
 131 /*-----------------------------------------------------------------------
 132  */
 133 void flash_print_info(flash_info_t *info)
 134 {
 135         int i;
 136
 137         switch (info->flash_id & FLASH_VENDMASK) {
 138         case (AMD_MANUFACT & FLASH_VENDMASK):
 139                 printf("AMD: ");
 140                 break;
 141         default:
 142                 printf("Unknown Vendor ");
 143                 break;
 144         }
 145
 146         switch (info->flash_id & FLASH_TYPEMASK) {
 147         case (AMD_ID_LV016B & FLASH_TYPEMASK):
 148                 printf("4x Amd29LV016B (16Mbit)\n");
 149                 break;
 150         default:
 151                 printf("Unknown Chip Type\n");
 152                 goto done;
 153                 break;
 154         }
 155
 156         printf("  Size: %ld MB in %d Sectors\n",
 157                info->size >> 20, info->sector_count);
 158
 159         printf("  Sector Start Addresses:");
 160         for (i = 0; i < info->sector_count; i++) {
 161                 if ((i % 5) == 0) {
 162                         printf ("\n   ");
 163                 }
 164                 printf (" %08lX%s", info->start[i],
 165                         info->protect[i] ? " (RO)" : "     ");
 166         }
 167         printf ("\n");
 168
 169         done:
 170 }
 171
 172 /*-----------------------------------------------------------------------
 173  */
 174
 175 int flash_erase(flash_info_t *info, int s_first, int s_last)
 176 {
 177         ulong result;
 178         int iflag, prot, sect;
 179         int rc = ERR_OK;
 180         int chip1, chip2;
 181
 182         /* first look for protection bits */
 183
 184         if (info->flash_id == FLASH_UNKNOWN) {
 185                 return ERR_UNKNOWN_FLASH_TYPE;
 186         }
 187
 188         if ((s_first < 0) || (s_first > s_last)) {
 189                 return ERR_INVAL;
 190         }
 191
 192         if ((info->flash_id & FLASH_VENDMASK) !=
 193             (AMD_MANUFACT & FLASH_VENDMASK)) {
 194                 return ERR_UNKNOWN_FLASH_VENDOR;
 195         }
 196
 197         prot = 0;
 198         for (sect=s_first; sect<=s_last; ++sect) {
 199                 if (info->protect[sect]) {
 200                         prot++;
 201                 }
 202         }
 203         if (prot) {
 204                 return ERR_PROTECTED;
 205         }
 206
 207         /*
 208          * Disable interrupts which might cause a timeout
 209          * here. Remember that our exception vectors are
 210          * at address 0 in the flash, and we don't want a
 211          * (ticker) exception to happen while the flash
 212          * chip is in programming mode.
 213          */
 214         iflag = disable_interrupts();
 215
 216         /* Start erase on unprotected sectors */
 217         for (sect = s_first; sect<=s_last && !ctrlc(); sect++) {
 218                 printf("Erasing sector %2d ... ", sect);
 219
 220                 /* arm simple, non interrupt dependent timer */
 221                 reset_timer();
 222
 223                 if (info->protect[sect] == 0) {
 224                         /* not protected */
 225                         ulong addr = info->start[sect];
 226
 227                         writel(CMD_UNLOCK1, addr + 1);
 228                         writel(CMD_UNLOCK2, addr + 2);
 229                         writel(CMD_ERASE_SETUP, addr + 1);
 230
 231                         writel(CMD_UNLOCK1, addr + 1);
 232                         writel(CMD_UNLOCK2, addr + 2);
 233                         writel(CMD_ERASE_CONFIRM, addr);
 234
 235
 236                         /* wait until flash is ready */
 237                         chip1 = chip2 = 0;
 238
 239                         do {
 240                                 result = readl(addr);
 241
 242                                 /* check timeout */
 243                                 if (get_timer(0) > CFG_FLASH_ERASE_TOUT) {
 244                                         writel(CMD_READ_ARRAY, addr + 1);
 245                                         chip1 = TMO;
 246                                         break;
 247                                 }
 248
 249                                 if (!chip1 && (result & 0xFFFF) & BIT_ERASE_DONE) {
 250                                         chip1 = READY;
 251                                 }
 252
 253                                 if (!chip1 && (result & 0xFFFF) & BIT_PROGRAM_ERROR) {
 254                                         chip1 = ERR;
 255                                 }
 256
 257                                 if (!chip2 && (result >> 16) & BIT_ERASE_DONE) {
 258                                         chip2 = READY;
 259                                 }
 260
 261                                 if (!chip2 && (result >> 16) & BIT_PROGRAM_ERROR) {
 262                                         chip2 = ERR;
 263                                 }
 264
 265                         }  while (!chip1 || !chip2);
 266
 267                         writel(CMD_READ_ARRAY, addr + 1);
 268
 269                         if (chip1 == ERR || chip2 == ERR) {
 270                                 rc = ERR_PROG_ERROR;
 271                                 goto outahere;
 272                         }
 273
 274                         if (chip1 == TMO) {
 275                                 rc = ERR_TIMOUT;
 276                                 goto outahere;
 277                         }
 278
 279                         printf("ok.\n");
 280                 } else { /* it was protected */
 281
 282                         printf("protected!\n");
 283                 }
 284         }
 285
 286         if (ctrlc()) {
 287                 printf("User Interrupt!\n");
 288         }
 289
 290 outahere:
 291         /* allow flash to settle - wait 10 ms */
 292         udelay(10000);
 293
 294         if (iflag) {
 295                 enable_interrupts();
 296         }
 297
 298         return rc;
 299 }
 300
 301 /*-----------------------------------------------------------------------
 302  * Copy memory to flash
 303  */
 304
 305 volatile static int write_word(flash_info_t *info, ulong dest, ulong data)
 306 {
 307         ulong addr = dest;
 308         ulong result;
 309         int rc = ERR_OK;
 310         int iflag;
 311         int chip1, chip2;
 312
 313         /*
 314          * Check if Flash is (sufficiently) erased
 315          */
 316         result = readl(addr);
 317         if ((result & data) != data) {
 318                 return ERR_NOT_ERASED;
 319         }
 320
 321         /*
 322          * Disable interrupts which might cause a timeout
 323          * here. Remember that our exception vectors are
 324          * at address 0 in the flash, and we don't want a
 325          * (ticker) exception to happen while the flash
 326          * chip is in programming mode.
 327          */
 328         iflag = disable_interrupts();
 329
 330         writel(CMD_UNLOCK1, addr + 1);
 331         writel(CMD_UNLOCK2, addr + 2);
 332         writel(CMD_UNLOCK_BYPASS, addr + 1);
 333         writel(addr, CMD_PROGRAM);
 334         writel(addr, data);
 335
 336         /* arm simple, non interrupt dependent timer */
 337         reset_timer();
 338
 339         /* wait until flash is ready */
 340         chip1 = chip2 = 0;
 341         do {
 342                 result = readl(addr);
 343
 344                 /* check timeout */
 345                 if (get_timer(0) > CFG_FLASH_ERASE_TOUT) {
 346                         chip1 = ERR | TMO;
 347                         break;
 348                 }
 349
 350                 if (!chip1 && ((result & 0x80) == (data & 0x80))) {
 351                         chip1 = READY;
 352                 }
 353
 354                 if (!chip1 && ((result & 0xFFFF) & BIT_PROGRAM_ERROR)) {
 355                         result = readl(addr);
 356
 357                         if ((result & 0x80) == (data & 0x80)) {
 358                                 chip1 = READY;
 359                         } else {
 360                                 chip1 = ERR;
 361                         }
 362                 }
 363
 364                 if (!chip2 && ((result & (0x80 << 16)) == (data & (0x80 << 16)))) {
 365                         chip2 = READY;
 366                 }
 367
 368                 if (!chip2 && ((result >> 16) & BIT_PROGRAM_ERROR)) {
 369                         result = readl(addr);
 370
 371                         if ((result & (0x80 << 16)) == (data & (0x80 << 16))) {
 372                                 chip2 = READY;
 373                         } else {
 374                                 chip2 = ERR;
 375                         }
 376                 }
 377
 378         }  while (!chip1 || !chip2);
 379
 380         writel(CMD_READ_ARRAY, addr);
 381
 382         if (chip1 == ERR || chip2 == ERR || readl(addr) != data) {
 383                 rc = ERR_PROG_ERROR;
 384         }
 385
 386         if (iflag) {
 387                 enable_interrupts();
 388         }
 389
 390         return rc;
 391 }
 392
 393 /*-----------------------------------------------------------------------
 394  * Copy memory to flash.
 395  */
 396
 397 int write_buff(flash_info_t *info, uchar *src, ulong addr, ulong cnt)
 398 {
 399         ulong cp, wp, data;
 400         int l;
 401         int i, rc;
 402
 403         wp = (addr & ~3);       /* get lower word aligned address */
 404
 405         /*
 406          * handle unaligned start bytes
 407          */
 408         if ((l = addr - wp) != 0) {
 409                 data = 0;
 410                 for (i=0, cp=wp; i<l; ++i, ++cp) {
 411                         data = (data >> 8) | (*(uchar *)cp << 24);
 412                 }
 413                 for (; i<4 && cnt>0; ++i) {
 414                         data = (data >> 8) | (*src++ << 24);
 415                         --cnt;
 416                         ++cp;
 417                 }
 418                 for (; cnt==0 && i<4; ++i, ++cp) {
 419                         data = (data >> 8) | (*(uchar *)cp << 24);
 420                 }
 421
 422                 if ((rc = write_word(info, wp, data)) != 0) {
 423                         return rc;
 424                 }
 425                 wp += 4;
 426         }
 427
 428         /*
 429          * handle word aligned part
 430          */
 431         while (cnt >= 4) {
 432                 data = *((vu_long*)src);
 433                 if ((rc = write_word(info, wp, data)) != 0) {
 434                         return rc;
 435                 }
 436                 src += 4;
 437                 wp  += 4;
 438                 cnt -= 4;
 439         }
 440
 441         if (cnt == 0) {
 442                 return ERR_OK;
 443         }
 444
 445         /*
 446          * handle unaligned tail bytes
 447          */
 448         data = 0;
 449         for (i=0, cp=wp; i<4 && cnt>0; ++i, ++cp) {
 450                 data = (data >> 8) | (*src++ << 24);
 451                 --cnt;
 452         }
 453         for (; i<4; ++i, ++cp) {
 454                 data = (data >> 8) | (*(uchar *)cp << 24);
 455         }
 456
 457         return write_word(info, wp, data);
 458 }