board/gcplus/flash.c

   1 /*
   2  * (C) Copyright 2001
   3  * Kyle Harris, Nexus Technologies, Inc. kharris@nexus-tech.net
   4  *
   5  * (C) Copyright 2001
   6  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   7  *
   8  * 2003 (c) MontaVista Software, Inc.
   9  *
  10  * See file CREDITS for list of people who contributed to this
  11  * project.
  12  *
  13  * This program is free software; you can redistribute it and/or
  14  * modify it under the terms of the GNU General Public License as
  15  * published by the Free Software Foundation; either version 2 of
  16  * the License, or (at your option) any later version.
  17  *
  18  * This program is distributed in the hope that it will be useful,
  19  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  20  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  21  * GNU General Public License for more details.
  22  *
  23  * You should have received a copy of the GNU General Public License
  24  * along with this program; if not, write to the Free Software
  25  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  26  * MA 02111-1307 USA
  27  */
  28
  29 #include <common.h>
  30 #include <linux/byteorder/swab.h>
  31
  32 flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS];    /* info for FLASH chips */
  33
  34 /* Board support for 1 or 2 flash devices */
  35 #define FLASH_PORT_WIDTH32
  36 #undef FLASH_PORT_WIDTH16
  37
  38 #ifdef FLASH_PORT_WIDTH16
  39 #define FLASH_PORT_WIDTH                ushort
  40 #define FLASH_PORT_WIDTHV               vu_short
  41 #define SWAP(x)                         __swab16(x)
  42 #else
  43 #define FLASH_PORT_WIDTH                ulong
  44 #define FLASH_PORT_WIDTHV               vu_long
  45 #define SWAP(x)                         __swab32(x)
  46 #endif
  47
  48 #define FPW                             FLASH_PORT_WIDTH
  49 #define FPWV                            FLASH_PORT_WIDTHV
  50
  51 #define mb() __asm__ __volatile__ ("" : : : "memory")
  52
  53 /*-----------------------------------------------------------------------
  54  * Functions
  55  */
  56 static ulong flash_get_size(FPW * addr, flash_info_t * info);
  57 static int write_data(flash_info_t * info, ulong dest, FPW data);
  58 static void flash_get_offsets(ulong base, flash_info_t * info);
  59 void inline spin_wheel(void);
  60
  61 /*-----------------------------------------------------------------------
  62  */
  63
  64 unsigned long
  65 flash_init(void)
  66 {
  67         int i;
  68         ulong size = 0;
  69
  70         for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; i++) {
  71                 switch (i) {
  72                 case 0:
  73                         flash_get_size((FPW *) PHYS_FLASH_1, &flash_info[i]);
  74                         flash_get_offsets(PHYS_FLASH_1, &flash_info[i]);
  75                         break;
  76                 default:
  77                         panic("configured too many flash banks!\n");
  78                         break;
  79                 }
  80                 size += flash_info[i].size;
  81         }
  82
  83         /* Protect monitor and environment sectors
  84          */
  85         flash_protect(FLAG_PROTECT_SET,
  86                       CONFIG_SYS_FLASH_BASE,
  87                       CONFIG_SYS_FLASH_BASE + monitor_flash_len - 1, &flash_info[0]);
  88
  89         flash_protect(FLAG_PROTECT_SET,
  90                       CONFIG_ENV_ADDR,
  91                       CONFIG_ENV_ADDR + CONFIG_ENV_SIZE - 1, &flash_info[0]);
  92
  93         return size;
  94 }
  95
  96 /*-----------------------------------------------------------------------
  97  */
  98 static void
  99 flash_get_offsets(ulong base, flash_info_t * info)
 100 {
 101         int i;
 102
 103         if (info->flash_id == FLASH_UNKNOWN) {
 104                 return;
 105         }
 106
 107         if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_INTEL) {
 108                 for (i = 0; i < info->sector_count; i++) {
 109                         info->start[i] = base + (i * PHYS_FLASH_SECT_SIZE);
 110                         info->protect[i] = 0;
 111                 }
 112         }
 113 }
 114
 115 /*-----------------------------------------------------------------------
 116  */
 117 void
 118 flash_print_info(flash_info_t * info)
 119 {
 120         int i;
 121
 122         if (info->flash_id == FLASH_UNKNOWN) {
 123                 printf("missing or unknown FLASH type\n");
 124                 return;
 125         }
 126
 127         switch (info->flash_id & FLASH_VENDMASK) {
 128         case FLASH_MAN_INTEL:
 129                 printf("INTEL ");
 130                 break;
 131         default:
 132                 printf("Unknown Vendor ");
 133                 break;
 134         }
 135
 136         switch (info->flash_id & FLASH_TYPEMASK) {
 137         case FLASH_28F128J3A:
 138                 printf("28F128J3A\n");
 139                 break;
 140         case FLASH_28F640J5:
 141                 printf("28F640J5\n");
 142                 break;
 143         default:
 144                 printf("Unknown Chip Type\n");
 145                 break;
 146         }
 147
 148         printf("  Size: %ld MB in %d Sectors\n",
 149                info->size >> 20, info->sector_count);
 150
 151         printf("  Sector Start Addresses:");
 152         for (i = 0; i < info->sector_count; ++i) {
 153                 if ((i % 5) == 0)
 154                         printf("\n   ");
 155                 printf(" %08lX%s",
 156                        info->start[i], info->protect[i] ? " (RO)" : "     ");
 157         }
 158         printf("\n");
 159         return;
 160 }
 161
 162 /*
 163  * The following code cannot be run from FLASH!
 164  */
 165 static ulong
 166 flash_get_size(FPW * addr, flash_info_t * info)
 167 {
 168         volatile FPW value;
 169         /* Write auto select command: read Manufacturer ID */
 170         addr[0x5555] = (FPW) 0x00AA00AA;
 171         addr[0x2AAA] = (FPW) 0x00550055;
 172         addr[0x5555] = (FPW) 0x00900090;
 173
 174         mb();
 175         value = addr[0];
 176
 177         switch (value) {
 178
 179         case (FPW) INTEL_MANUFACT:
 180                 info->flash_id = FLASH_MAN_INTEL;
 181                 break;
 182
 183         default:
 184                 info->flash_id = FLASH_UNKNOWN;
 185                 info->sector_count = 0;
 186                 info->size = 0;
 187                 addr[0] = (FPW) 0x00FF00FF;     /* restore read mode */
 188                 return (0);     /* no or unknown flash  */
 189         }
 190
 191         mb();
 192         value = addr[1];        /* device ID            */
 193         switch (value) {
 194         case (FPW) INTEL_ID_28F128J3A:
 195                 info->flash_id += FLASH_28F128J3A;
 196                 info->sector_count = 128;
 197                 info->size = 0x02000000;
 198                 break;          /* => 16 MB     */
 199         case (FPW) INTEL_ID_28F640J5:
 200                 info->flash_id += FLASH_28F640J5;
 201                 info->sector_count = 64;
 202                 info->size = 0x01000000;
 203                 break;          /* => 16 MB     */
 204
 205         default:
 206                 info->flash_id = FLASH_UNKNOWN;
 207                 break;
 208         }
 209
 210         if (info->sector_count > CONFIG_SYS_MAX_FLASH_SECT) {
 211                 printf("** ERROR: sector count %d > max (%d) **\n",
 212                        info->sector_count, CONFIG_SYS_MAX_FLASH_SECT);
 213                 info->sector_count = CONFIG_SYS_MAX_FLASH_SECT;
 214         }
 215
 216         addr[0] = (FPW) 0x00FF00FF;     /* restore read mode */
 217
 218         return (info->size);
 219 }
 220
 221 /*-----------------------------------------------------------------------
 222  */
 223
 224 int
 225 flash_erase(flash_info_t * info, int s_first, int s_last)
 226 {
 227         int flag, prot, sect;
 228         ulong type, start, last;
 229         int rcode = 0;
 230
 231         if ((s_first < 0) || (s_first > s_last)) {
 232                 if (info->flash_id == FLASH_UNKNOWN) {
 233                         printf("- missing\n");
 234                 } else {
 235                         printf("- no sectors to erase\n");
 236                 }
 237                 return 1;
 238         }
 239
 240         type = (info->flash_id & FLASH_VENDMASK);
 241         if ((type != FLASH_MAN_INTEL)) {
 242                 printf("Can't erase unknown flash type %08lx - aborted\n",
 243                        info->flash_id);
 244                 return 1;
 245         }
 246
 247         prot = 0;
 248         for (sect = s_first; sect <= s_last; ++sect) {
 249                 if (info->protect[sect]) {
 250                         prot++;
 251                 }
 252         }
 253
 254         if (prot) {
 255                 printf("- Warning: %d protected sectors will not be erased!\n",
 256                        prot);
 257         } else {
 258                 printf("\n");
 259         }
 260
 261         start = get_timer(0);
 262         last = start;
 263
 264         /* Disable interrupts which might cause a timeout here */
 265         flag = disable_interrupts();
 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                         FPWV *addr = (FPWV *) (info->start[sect]);
 271                         FPW status;
 272
 273                         printf("Erasing sector %2d ... ", sect);
 274
 275                         /* arm simple, non interrupt dependent timer */
 276                         reset_timer_masked();
 277
 278                         *addr = (FPW) 0x00500050;       /* clear status register */
 279                         *addr = (FPW) 0x00200020;       /* erase setup */
 280                         *addr = (FPW) 0x00D000D0;       /* erase confirm */
 281
 282                         while (((status =
 283                                  *addr) & (FPW) 0x00800080) !=
 284                                (FPW) 0x00800080) {
 285                                 if (get_timer_masked() > CONFIG_SYS_FLASH_ERASE_TOUT) {
 286                                         printf("Timeout\n");
 287                                         *addr = (FPW) 0x00B000B0;       /* suspend erase         */
 288                                         *addr = (FPW) 0x00FF00FF;       /* reset to read mode */
 289                                         rcode = 1;
 290                                         break;
 291                                 }
 292                         }
 293
 294                         *addr = (FPW) 0x00500050;       /* clear status register cmd.   */
 295                         *addr = (FPW) 0x00FF00FF;       /* resest to read mode          */
 296
 297                         printf(" done\n");
 298                 }
 299         }
 300         return rcode;
 301 }
 302
 303 /*-----------------------------------------------------------------------
 304  * Copy memory to flash, returns:
 305  * 0 - OK
 306  * 1 - write timeout
 307  * 2 - Flash not erased
 308  * 4 - Flash not identified
 309  */
 310
 311 int
 312 write_buff(flash_info_t * info, uchar * src, ulong addr, ulong cnt)
 313 {
 314         ulong cp, wp;
 315         FPW data;
 316         int count, i, l, rc, port_width;
 317
 318         if (info->flash_id == FLASH_UNKNOWN) {
 319                 return 4;
 320         }
 321 /* get lower word aligned address */
 322 #ifdef FLASH_PORT_WIDTH16
 323         wp = (addr & ~1);
 324         port_width = 2;
 325 #else
 326         wp = (addr & ~3);
 327         port_width = 4;
 328 #endif
 329
 330         /*
 331          * handle unaligned start bytes
 332          */
 333         if ((l = addr - wp) != 0) {
 334                 data = 0;
 335                 for (i = 0, cp = wp; i < l; ++i, ++cp) {
 336                         data = (data << 8) | (*(uchar *) cp);
 337                 }
 338                 for (; i < port_width && cnt > 0; ++i) {
 339                         data = (data << 8) | *src++;
 340                         --cnt;
 341                         ++cp;
 342                 }
 343                 for (; cnt == 0 && i < port_width; ++i, ++cp) {
 344                         data = (data << 8) | (*(uchar *) cp);
 345                 }
 346
 347                 if ((rc = write_data(info, wp, SWAP(data))) != 0) {
 348                         return (rc);
 349                 }
 350                 wp += port_width;
 351         }
 352
 353         /*
 354          * handle word aligned part
 355          */
 356         count = 0;
 357         while (cnt >= port_width) {
 358                 data = 0;
 359                 for (i = 0; i < port_width; ++i) {
 360                         data = (data << 8) | *src++;
 361                 }
 362                 if ((rc = write_data(info, wp, SWAP(data))) != 0) {
 363                         return (rc);
 364                 }
 365                 wp += port_width;
 366                 cnt -= port_width;
 367                 if (count++ > 0x800) {
 368                         spin_wheel();
 369                         count = 0;
 370                 }
 371         }
 372
 373         if (cnt == 0) {
 374                 return (0);
 375         }
 376
 377         /*
 378          * handle unaligned tail bytes
 379          */
 380         data = 0;
 381         for (i = 0, cp = wp; i < port_width && cnt > 0; ++i, ++cp) {
 382                 data = (data << 8) | *src++;
 383                 --cnt;
 384         }
 385         for (; i < port_width; ++i, ++cp) {
 386                 data = (data << 8) | (*(uchar *) cp);
 387         }
 388
 389         return (write_data(info, wp, SWAP(data)));
 390 }
 391
 392 /*-----------------------------------------------------------------------
 393  * Write a word or halfword to Flash, returns:
 394  * 0 - OK
 395  * 1 - write timeout
 396  * 2 - Flash not erased
 397  */
 398 static int
 399 write_data(flash_info_t * info, ulong dest, FPW data)
 400 {
 401         FPWV *addr = (FPWV *) dest;
 402         ulong status;
 403         int flag;
 404
 405         /* Check if Flash is (sufficiently) erased */
 406         if ((*addr & data) != data) {
 407                 printf("not erased at %08lX (%lX)\n", (ulong) addr, *addr);
 408                 return (2);
 409         }
 410         /* Disable interrupts which might cause a timeout here */
 411         flag = disable_interrupts();
 412
 413         *addr = (FPW) 0x00400040;       /* write setup */
 414         *addr = data;
 415
 416         /* arm simple, non interrupt dependent timer */
 417         reset_timer_masked();
 418
 419         /* wait while polling the status register */
 420         while (((status = *addr) & (FPW) 0x00800080) != (FPW) 0x00800080) {
 421                 if (get_timer_masked() > CONFIG_SYS_FLASH_WRITE_TOUT) {
 422                         *addr = (FPW) 0x00FF00FF;       /* restore read mode */
 423                         return (1);
 424                 }
 425         }
 426
 427         *addr = (FPW) 0x00FF00FF;       /* restore read mode */
 428
 429         return (0);
 430 }
 431
 432 void inline
 433 spin_wheel(void)
 434 {
 435         static int p = 0;
 436         static char w[] = "\\/-";
 437
 438         printf("\010%c", w[p]);
 439         (++p == 3) ? (p = 0) : 0;
 440 }