board/siemens/SMN42/flash.c

   1 /*
   2  * (C) Copyright 2006 Embedded Artists AB <www.embeddedartists.com>
   3  *
   4  * (C) Copyright 2007 Gary Jennejohn garyj@denx.de
   5  * Modified to use the routines in cpu/arm720t/lpc2292/flash.c.
   6  * Heavily modified to support the SMN42 board from Siemens
   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 <asm/byteorder.h>
  26 #include <asm/arch/hardware.h>
  27
  28 static unsigned long flash_addr_table[CFG_MAX_FLASH_BANKS]
  29                                                 = CFG_FLASH_BANKS_LIST;
  30 flash_info_t flash_info[CFG_MAX_FLASH_BANKS];
  31
  32 extern int lpc2292_copy_buffer_to_flash(flash_info_t *, ulong);
  33 extern int lpc2292_flash_erase(flash_info_t *, int, int);
  34 extern int lpc2292_write_buff (flash_info_t *, uchar *, ulong, ulong);
  35 static unsigned long ext_flash_init(void);
  36 static int ext_flash_erase(flash_info_t *, int, int);
  37 static int ext_write_buff(flash_info_t *, uchar *, ulong, ulong);
  38
  39 /*-----------------------------------------------------------------------
  40  */
  41
  42 ulong flash_init (void)
  43 {
  44         int j, k;
  45         ulong size = 0;
  46         ulong flashbase = 0;
  47
  48         flash_info[0].flash_id = PHILIPS_LPC2292;
  49         flash_info[0].size = 0x003E000; /* 256 - 8 KB */
  50         flash_info[0].sector_count = 17;
  51         memset (flash_info[0].protect, 0, 17);
  52         flashbase = 0x00000000;
  53         for (j = 0, k = 0; j < 8; j++, k++) {
  54                 flash_info[0].start[k] = flashbase;
  55                 flashbase += 0x00002000;
  56         }
  57         for (j = 0; j < 2; j++, k++) {
  58                 flash_info[0].start[k] = flashbase;
  59                 flashbase += 0x00010000;
  60         }
  61         for (j = 0; j < 7; j++, k++) {
  62                 flash_info[0].start[k] = flashbase;
  63                 flashbase += 0x00002000;
  64         }
  65         size += flash_info[0].size;
  66
  67         /* Protect monitor and environment sectors */
  68         flash_protect (FLAG_PROTECT_SET,
  69                  0x0,
  70                  0x0 + monitor_flash_len - 1,
  71                  &flash_info[0]);
  72
  73         flash_protect (FLAG_PROTECT_SET,
  74                  CFG_ENV_ADDR,
  75                  CFG_ENV_ADDR + CFG_ENV_SIZE - 1,
  76                  &flash_info[0]);
  77
  78         size += ext_flash_init();
  79
  80         return size;
  81 }
  82
  83 /*-----------------------------------------------------------------------
  84  */
  85 void flash_print_info (flash_info_t * info)
  86 {
  87         int i;
  88         int erased = 0;
  89         unsigned long j;
  90         unsigned long count;
  91         unsigned char *p;
  92
  93         switch (info->flash_id & FLASH_VENDMASK) {
  94         case (PHILIPS_LPC2292 & FLASH_VENDMASK):
  95                 printf("Philips: ");
  96                 break;
  97         case FLASH_MAN_AMD:
  98                 printf("AMD: ");
  99                 break;
 100         default:
 101                 printf ("Unknown Vendor ");
 102                 break;
 103         }
 104
 105         switch (info->flash_id & FLASH_TYPEMASK) {
 106         case (PHILIPS_LPC2292 & FLASH_TYPEMASK):
 107                 printf("LPC2292 internal flash\n");
 108                 break;
 109         case FLASH_S29GL128N:
 110                 printf ("S29GL128N (128 Mbit, uniform sector size)\n");
 111                 break;
 112         default:
 113                 printf("Unknown Chip Type\n");
 114                 return;
 115         }
 116
 117         printf ("  Size: %ld KB in %d Sectors\n",
 118           info->size >> 10, info->sector_count);
 119
 120         printf ("  Sector Start Addresses:");
 121         for (i = 0; i < info->sector_count; i++) {
 122                 if ((i % 5) == 0) {
 123                         printf ("\n   ");
 124                 }
 125                 if (i < (info->sector_count - 1)) {
 126                         count = info->start[i+1] - info->start[i];
 127                 }
 128                 else {
 129                         count = info->start[0] + info->size - info->start[i];
 130                 }
 131                 p = (unsigned char*)(info->start[i]);
 132                 erased = 1;
 133                 for (j = 0; j < count; j++) {
 134                         if (*p != 0xFF) {
 135                                 erased = 0;
 136                                 break;
 137                         }
 138                         p++;
 139                 }
 140                 printf (" %08lX%s%s", info->start[i], info->protect[i] ? " RO" : "   ",
 141                         erased ? " E" : "  ");
 142         }
 143         printf ("\n");
 144 }
 145
 146 int flash_erase (flash_info_t * info, int s_first, int s_last)
 147 {
 148         switch (info->flash_id & FLASH_TYPEMASK) {
 149                 case (PHILIPS_LPC2292 & FLASH_TYPEMASK):
 150                         return lpc2292_flash_erase(info, s_first, s_last);
 151                 case FLASH_S29GL128N:
 152                         return ext_flash_erase(info, s_first, s_last);
 153                 default:
 154                         return ERR_PROTECTED;
 155         }
 156         return ERR_PROTECTED;
 157 }
 158
 159 int write_buff (flash_info_t * info, uchar * src, ulong addr, ulong cnt)
 160 {
 161         switch (info->flash_id & FLASH_TYPEMASK) {
 162                 case (PHILIPS_LPC2292 & FLASH_TYPEMASK):
 163                         return lpc2292_write_buff(info, src, addr, cnt);
 164                 case FLASH_S29GL128N:
 165                         return ext_write_buff(info, src, addr, cnt);
 166                 default:
 167                         return ERR_PROG_ERROR;
 168         }
 169         return ERR_PROG_ERROR;
 170 }
 171
 172 /*--------------------------------------------------------------------------
 173  * From here on is code for the external S29GL128N taken from cam5200_flash.c
 174  */
 175
 176 #define CFG_FLASH_WORD_SIZE unsigned short
 177
 178 static int wait_for_DQ7_32(flash_info_t * info, int sect)
 179 {
 180         ulong start, now, last;
 181         volatile CFG_FLASH_WORD_SIZE *addr =
 182                 (CFG_FLASH_WORD_SIZE *) (info->start[sect]);
 183
 184         start = get_timer(0);
 185         last = start;
 186         while ((addr[0] & (CFG_FLASH_WORD_SIZE) 0x00800080) !=
 187                         (CFG_FLASH_WORD_SIZE) 0x00800080) {
 188                 if ((now = get_timer(start)) > CFG_FLASH_ERASE_TOUT) {
 189                         printf("Timeout\n");
 190                         return -1;
 191                 }
 192                 /* show that we're waiting */
 193                 if ((now - last) > 1000) {      /* every second */
 194                         putc('.');
 195                         last = now;
 196                 }
 197         }
 198         return 0;
 199 }
 200
 201 int ext_flash_erase(flash_info_t * info, int s_first, int s_last)
 202 {
 203         volatile CFG_FLASH_WORD_SIZE *addr = (CFG_FLASH_WORD_SIZE *) (info->start[0]);
 204         volatile CFG_FLASH_WORD_SIZE *addr2;
 205         int flag, prot, sect, l_sect, ret;
 206
 207         ret = 0;
 208         if ((s_first < 0) || (s_first > s_last)) {
 209                 if (info->flash_id == FLASH_UNKNOWN)
 210                         printf("- missing\n");
 211                 else
 212                         printf("- no sectors to erase\n");
 213                 return 1;
 214         }
 215
 216         if (info->flash_id == FLASH_UNKNOWN) {
 217                 printf("Can't erase unknown flash type - aborted\n");
 218                 return 1;
 219         }
 220
 221         prot = 0;
 222         for (sect = s_first; sect <= s_last; ++sect) {
 223                 if (info->protect[sect])
 224                         prot++;
 225         }
 226
 227         if (prot)
 228                 printf("- Warning: %d protected sectors will not be erased!", prot);
 229
 230         printf("\n");
 231
 232         l_sect = -1;
 233
 234         /* Disable interrupts which might cause a timeout here */
 235         flag = disable_interrupts();
 236
 237         /* Start erase on unprotected sectors */
 238         for (sect = s_first; sect <= s_last; sect++) {
 239                 if (info->protect[sect] == 0) { /* not protected */
 240                         addr2 = (CFG_FLASH_WORD_SIZE *) (info->start[sect]);
 241
 242                         addr[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0x00AA00AA;
 243                         addr[CFG_FLASH_ADDR1] = (CFG_FLASH_WORD_SIZE) 0x00550055;
 244                         addr[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0x00800080;
 245                         addr[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0x00AA00AA;
 246                         addr[CFG_FLASH_ADDR1] = (CFG_FLASH_WORD_SIZE) 0x00550055;
 247                         addr2[0] = (CFG_FLASH_WORD_SIZE) 0x00300030;    /* sector erase */
 248
 249                         l_sect = sect;
 250                         /*
 251                          * Wait for each sector to complete, it's more
 252                          * reliable.  According to AMD Spec, you must
 253                          * issue all erase commands within a specified
 254                          * timeout.  This has been seen to fail, especially
 255                          * if printf()s are included (for debug)!!
 256                          */
 257                         ret = wait_for_DQ7_32(info, sect);
 258                         if (ret) {
 259                                 ret = ERR_PROTECTED;
 260                                 break;
 261                         }
 262                 }
 263         }
 264
 265         /* re-enable interrupts if necessary */
 266         if (flag)
 267                 enable_interrupts();
 268
 269         /* wait at least 80us - let's wait 1 ms */
 270         udelay(1000);
 271
 272         /* reset to read mode */
 273         addr = (CFG_FLASH_WORD_SIZE *) info->start[0];
 274         addr[0] = (CFG_FLASH_WORD_SIZE) 0x00F000F0;     /* reset bank */
 275
 276         if (ret)
 277                 printf(" error\n");
 278         else
 279                 printf(" done\n");
 280         return ret;
 281 }
 282
 283 static ulong flash_get_size(vu_long * addr, flash_info_t * info)
 284 {
 285         short i;
 286         CFG_FLASH_WORD_SIZE value;
 287         ulong base = (ulong) addr;
 288         volatile CFG_FLASH_WORD_SIZE *addr2 = (CFG_FLASH_WORD_SIZE *) addr;
 289
 290         /* Write auto select command: read Manufacturer ID */
 291         addr2[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0x00AA00AA;
 292         addr2[CFG_FLASH_ADDR1] = (CFG_FLASH_WORD_SIZE) 0x00550055;
 293         addr2[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0x00900090;
 294         udelay(1000);
 295
 296         value = addr2[0];
 297
 298         switch (value) {
 299                 case (CFG_FLASH_WORD_SIZE) AMD_MANUFACT:
 300                         info->flash_id = FLASH_MAN_AMD;
 301                         break;
 302                 default:
 303                         info->flash_id = FLASH_UNKNOWN;
 304                         info->sector_count = 0;
 305                         info->size = 0;
 306                         return (0);     /* no or unknown flash  */
 307         }
 308
 309         value = addr2[1];       /* device ID            */
 310
 311         switch (value) {
 312                 case (CFG_FLASH_WORD_SIZE)AMD_ID_MIRROR:
 313                         value = addr2[14];
 314                         switch(value) {
 315                                 case (CFG_FLASH_WORD_SIZE)AMD_ID_GL128N_2:
 316                                         value = addr2[15];
 317                                         if (value != (CFG_FLASH_WORD_SIZE)AMD_ID_GL128N_3) {
 318                                                 info->flash_id = FLASH_UNKNOWN;
 319                                         } else {
 320                                                 info->flash_id += FLASH_S29GL128N;
 321                                                 info->sector_count = 128;
 322                                                 info->size = 0x01000000;
 323                                         }
 324                                         break;
 325                                 default:
 326                                         info->flash_id = FLASH_UNKNOWN;
 327                                         return(0);
 328                         }
 329                         break;
 330
 331                 default:
 332                         info->flash_id = FLASH_UNKNOWN;
 333                         return (0);     /* => no or unknown flash */
 334         }
 335
 336         /* set up sector start address table */
 337         for (i = 0; i < info->sector_count; i++)
 338                 info->start[i] = base + (i * 0x00020000);
 339
 340         /* check for protected sectors */
 341         for (i = 0; i < info->sector_count; i++) {
 342                 /* read sector protection at sector address, (A7 .. A0) = 0x02 */
 343                 /* D0 = 1 if protected */
 344                 addr2 = (volatile CFG_FLASH_WORD_SIZE *)(info->start[i]);
 345
 346                 info->protect[i] = addr2[2] & 1;
 347         }
 348
 349         /* issue bank reset to return to read mode */
 350         addr2[0] = (CFG_FLASH_WORD_SIZE) 0x00F000F0;
 351
 352         return (info->size);
 353 }
 354
 355 static unsigned long ext_flash_init(void)
 356 {
 357         unsigned long total_b = 0;
 358         unsigned long size_b[CFG_MAX_FLASH_BANKS];
 359         int i;
 360
 361         /* Init: no FLASHes known */
 362         for (i = 1; i < CFG_MAX_FLASH_BANKS; ++i) {
 363                 flash_info[i].flash_id = FLASH_UNKNOWN;
 364                 flash_info[i].sector_count = -1;
 365                 flash_info[i].size = 0;
 366
 367                 /* call flash_get_size() to initialize sector address */
 368                 size_b[i] = flash_get_size((vu_long *) flash_addr_table[i],
 369                                 &flash_info[i]);
 370
 371                 flash_info[i].size = size_b[i];
 372
 373                 if (flash_info[i].flash_id == FLASH_UNKNOWN) {
 374                         printf("## Unknown FLASH on Bank %d - Size = 0x%08lx = %ld MB\n",
 375                                         i+1, size_b[i], size_b[i] << 20);
 376                         flash_info[i].sector_count = -1;
 377                         flash_info[i].size = 0;
 378                 }
 379
 380                 total_b += flash_info[i].size;
 381         }
 382
 383         return total_b;
 384 }
 385
 386 static int write_word(flash_info_t * info, ulong dest, ushort data)
 387 {
 388         volatile CFG_FLASH_WORD_SIZE *addr2 = (CFG_FLASH_WORD_SIZE *) (info->start[0]);
 389         volatile CFG_FLASH_WORD_SIZE *dest2 = (CFG_FLASH_WORD_SIZE *) dest;
 390         volatile CFG_FLASH_WORD_SIZE *data2 = (CFG_FLASH_WORD_SIZE *) &data;
 391         ulong start;
 392         int flag;
 393
 394         /* Check if Flash is (sufficiently) erased */
 395         if ((*dest2 & *data2) != *data2) {
 396                 return (2);
 397         }
 398
 399         /* Disable interrupts which might cause a timeout here */
 400         flag = disable_interrupts();
 401
 402         addr2[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0x00AA00AA;
 403         addr2[CFG_FLASH_ADDR1] = (CFG_FLASH_WORD_SIZE) 0x00550055;
 404         addr2[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0x00A000A0;
 405         *dest2 = *data2;
 406
 407         /* re-enable interrupts if necessary */
 408         if (flag)
 409                 enable_interrupts();
 410
 411         /* data polling for D7 */
 412         start = get_timer(0);
 413         while ((*dest2 & (CFG_FLASH_WORD_SIZE) 0x00800080) !=
 414                         (*data2 & (CFG_FLASH_WORD_SIZE) 0x00800080)) {
 415
 416                 if (get_timer(start) > CFG_FLASH_WRITE_TOUT) {
 417                         printf("WRITE_TOUT\n");
 418                         return (1);
 419                 }
 420         }
 421         return (0);
 422 }
 423
 424 /*-----------------------------------------------------------------------
 425  * This is taken from the original flash.c for the LPC2292 SODIMM board
 426  * and modified to suit.
 427  */
 428
 429 int ext_write_buff(flash_info_t * info, uchar * src, ulong addr, ulong cnt)
 430 {
 431         ushort tmp;
 432         ulong i;
 433         uchar* src_org;
 434         uchar* dst_org;
 435         ulong cnt_org = cnt;
 436         int ret = ERR_OK;
 437
 438         src_org = src;
 439         dst_org = (uchar*)addr;
 440
 441         if (addr & 1) {         /* if odd address */
 442                 tmp = *((uchar*)(addr - 1)); /* little endian */
 443                 tmp |= (*src << 8);
 444                 if (write_word(info, addr - 1, tmp))
 445                         return ERR_PROG_ERROR;
 446                 addr += 1;
 447                 cnt -= 1;
 448                 src++;
 449         }
 450         while (cnt > 1) {
 451                 tmp = ((*(src+1)) << 8) + (*src); /* little endian */
 452                 if (write_word(info, addr, tmp))
 453                         return ERR_PROG_ERROR;
 454                 addr += 2;
 455                 src += 2;
 456                 cnt -= 2;
 457         }
 458         if (cnt > 0) {
 459                 tmp = (*((uchar*)(addr + 1))) << 8;
 460                 tmp |= *src;
 461                 if (write_word(info, addr, tmp))
 462                         return ERR_PROG_ERROR;
 463         }
 464
 465         for (i = 0; i < cnt_org; i++) {
 466                 if (*dst_org != *src_org) {
 467                         printf("Write failed. Byte %lX differs\n", i);
 468                         ret = ERR_PROG_ERROR;
 469                         break;
 470                 }
 471                 dst_org++;
 472                 src_org++;
 473         }
 474
 475         return ret;
 476 }