board/ep7312/flash.c

   1 /*
   2  * (C) Copyright 2002
   3  * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
   4  * Marius Groeger <mgroeger@sysgo.de>
   5  *
   6  * See file CREDITS for list of people who contributed to this
   7  * project.
   8  *
   9  * This program is free software; you can redistribute it and/or
  10  * modify it under the terms of the GNU General Public License as
  11  * published by the Free Software Foundation; either version 2 of
  12  * the License, or (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program; if not, write to the Free Software
  21  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  22  * MA 02111-1307 USA
  23  */
  24
  25 #include <common.h>
  26
  27 #define FLASH_BANK_SIZE 0x1000000
  28 #define MAIN_SECT_SIZE  0x20000
  29
  30 flash_info_t    flash_info[CFG_MAX_FLASH_BANKS];
  31
  32
  33 /*-----------------------------------------------------------------------
  34  */
  35
  36 ulong flash_init (void)
  37 {
  38         int i, j;
  39         ulong size = 0;
  40
  41         for (i = 0; i < CFG_MAX_FLASH_BANKS; i++) {
  42                 ulong flashbase = 0;
  43
  44                 flash_info[i].flash_id =
  45                                 (INTEL_MANUFACT & FLASH_VENDMASK) |
  46                                 (INTEL_ID_28F128J3 & FLASH_TYPEMASK);
  47                 flash_info[i].size = FLASH_BANK_SIZE;
  48                 flash_info[i].sector_count = CFG_MAX_FLASH_SECT;
  49                 memset (flash_info[i].protect, 0, CFG_MAX_FLASH_SECT);
  50                 if (i == 0)
  51                         flashbase = PHYS_FLASH_1;
  52                 else
  53                         panic ("configured to many flash banks!\n");
  54                 for (j = 0; j < flash_info[i].sector_count; j++) {
  55                         flash_info[i].start[j] = flashbase + j * MAIN_SECT_SIZE;
  56                 }
  57                 size += flash_info[i].size;
  58         }
  59
  60         /* Protect monitor and environment sectors
  61          */
  62         flash_protect ( FLAG_PROTECT_SET,
  63                         CFG_FLASH_BASE,
  64                         CFG_FLASH_BASE + monitor_flash_len - 1,
  65                         &flash_info[0]);
  66
  67         flash_protect ( FLAG_PROTECT_SET,
  68                         CFG_ENV_ADDR,
  69                         CFG_ENV_ADDR + CFG_ENV_SIZE - 1, &flash_info[0]);
  70
  71         return size;
  72 }
  73
  74 /*-----------------------------------------------------------------------
  75  */
  76 void flash_print_info (flash_info_t * info)
  77 {
  78         int i;
  79
  80         switch (info->flash_id & FLASH_VENDMASK) {
  81         case (INTEL_MANUFACT & FLASH_VENDMASK):
  82                 printf ("Intel: ");
  83                 break;
  84         default:
  85                 printf ("Unknown Vendor ");
  86                 break;
  87         }
  88
  89         switch (info->flash_id & FLASH_TYPEMASK) {
  90         case (INTEL_ID_28F128J3 & FLASH_TYPEMASK):
  91                 printf ("28F128J3 (128Mbit)\n");
  92                 break;
  93         default:
  94                 printf ("Unknown Chip Type\n");
  95                 goto Done;
  96                 break;
  97         }
  98
  99         printf ("  Size: %ld MB in %d Sectors\n",
 100                         info->size >> 20, info->sector_count);
 101
 102         printf ("  Sector Start Addresses:");
 103         for (i = 0; i < info->sector_count; i++) {
 104                 if ((i % 5) == 0) {
 105                         printf ("\n   ");
 106                 }
 107                 printf (" %08lX%s", info->start[i],
 108                                 info->protect[i] ? " (RO)" : "     ");
 109         }
 110         printf ("\n");
 111
 112   Done:
 113 }
 114
 115 /*-----------------------------------------------------------------------
 116  */
 117
 118 int flash_erase (flash_info_t * info, int s_first, int s_last)
 119 {
 120         int flag, prot, sect;
 121         int rc = ERR_OK;
 122
 123         if (info->flash_id == FLASH_UNKNOWN)
 124                 return ERR_UNKNOWN_FLASH_TYPE;
 125
 126         if ((s_first < 0) || (s_first > s_last)) {
 127                 return ERR_INVAL;
 128         }
 129
 130         if ((info->flash_id & FLASH_VENDMASK) !=
 131                 (INTEL_MANUFACT & FLASH_VENDMASK)) {
 132                 return ERR_UNKNOWN_FLASH_VENDOR;
 133         }
 134
 135         prot = 0;
 136         for (sect = s_first; sect <= s_last; ++sect) {
 137                 if (info->protect[sect]) {
 138                         prot++;
 139                 }
 140         }
 141         if (prot)
 142                 return ERR_PROTECTED;
 143
 144         /*
 145          * Disable interrupts which might cause a timeout
 146          * here. Remember that our exception vectors are
 147          * at address 0 in the flash, and we don't want a
 148          * (ticker) exception to happen while the flash
 149          * chip is in programming mode.
 150          */
 151         flag = disable_interrupts ();
 152
 153         /* Start erase on unprotected sectors */
 154         for (sect = s_first; sect <= s_last && !ctrlc (); sect++) {
 155
 156                 printf ("Erasing sector %2d ... ", sect);
 157
 158                 /* arm simple, non interrupt dependent timer */
 159                 reset_timer_masked ();
 160
 161                 if (info->protect[sect] == 0) { /* not protected */
 162                         vu_short *addr = (vu_short *) (info->start[sect]);
 163
 164                         *addr = 0x20;           /* erase setup */
 165                         *addr = 0xD0;           /* erase confirm */
 166
 167                         while ((*addr & 0x80) != 0x80) {
 168                                 if (get_timer_masked () > CFG_FLASH_ERASE_TOUT) {
 169                                         *addr = 0xB0;   /* suspend erase */
 170                                         *addr = 0xFF;   /* reset to read mode */
 171                                         rc = ERR_TIMOUT;
 172                                         goto outahere;
 173                                 }
 174                         }
 175
 176                         /* clear status register command */
 177                         *addr = 0x50;
 178                         /* reset to read mode */
 179                         *addr = 0xFF;
 180                 }
 181                 printf ("ok.\n");
 182         }
 183         if (ctrlc ())
 184                 printf ("User Interrupt!\n");
 185
 186   outahere:
 187
 188         /* allow flash to settle - wait 10 ms */
 189         udelay_masked (10000);
 190
 191         if (flag)
 192                 enable_interrupts ();
 193
 194         return rc;
 195 }
 196
 197 /*-----------------------------------------------------------------------
 198  * Copy memory to flash
 199  */
 200
 201 static int write_word (flash_info_t * info, ulong dest, ushort data)
 202 {
 203         vu_short *addr = (vu_short *) dest, val;
 204         int rc = ERR_OK;
 205         int flag;
 206
 207         /* Check if Flash is (sufficiently) erased
 208          */
 209         if ((*addr & data) != data)
 210                 return ERR_NOT_ERASED;
 211
 212         /*
 213          * Disable interrupts which might cause a timeout
 214          * here. Remember that our exception vectors are
 215          * at address 0 in the flash, and we don't want a
 216          * (ticker) exception to happen while the flash
 217          * chip is in programming mode.
 218          */
 219         flag = disable_interrupts ();
 220
 221         /* clear status register command */
 222         *addr = 0x50;
 223
 224         /* program set-up command */
 225         *addr = 0x40;
 226
 227         /* latch address/data */
 228         *addr = data;
 229
 230         /* arm simple, non interrupt dependent timer */
 231         reset_timer_masked ();
 232
 233         /* wait while polling the status register */
 234         while (((val = *addr) & 0x80) != 0x80) {
 235                 if (get_timer_masked () > CFG_FLASH_WRITE_TOUT) {
 236                         rc = ERR_TIMOUT;
 237                         /* suspend program command */
 238                         *addr = 0xB0;
 239                         goto outahere;
 240                 }
 241         }
 242
 243         if (val & 0x1A) {                       /* check for error */
 244                 printf ("\nFlash write error %02x at address %08lx\n",
 245                                 (int) val, (unsigned long) dest);
 246                 if (val & (1 << 3)) {
 247                         printf ("Voltage range error.\n");
 248                         rc = ERR_PROG_ERROR;
 249                         goto outahere;
 250                 }
 251                 if (val & (1 << 1)) {
 252                         printf ("Device protect error.\n");
 253                         rc = ERR_PROTECTED;
 254                         goto outahere;
 255                 }
 256                 if (val & (1 << 4)) {
 257                         printf ("Programming error.\n");
 258                         rc = ERR_PROG_ERROR;
 259                         goto outahere;
 260                 }
 261                 rc = ERR_PROG_ERROR;
 262                 goto outahere;
 263         }
 264
 265   outahere:
 266         /* read array command */
 267         *addr = 0xFF;
 268
 269         if (flag)
 270                 enable_interrupts ();
 271
 272         return rc;
 273 }
 274
 275 /*-----------------------------------------------------------------------
 276  * Copy memory to flash.
 277  */
 278
 279 int write_buff (flash_info_t * info, uchar * src, ulong addr, ulong cnt)
 280 {
 281         ulong cp, wp;
 282         ushort data;
 283         int l;
 284         int i, rc;
 285
 286         wp = (addr & ~1);                       /* get lower word aligned address */
 287
 288         /*
 289          * handle unaligned start bytes
 290          */
 291         if ((l = addr - wp) != 0) {
 292                 data = 0;
 293                 for (i = 0, cp = wp; i < l; ++i, ++cp) {
 294                         data = (data >> 8) | (*(uchar *) cp << 8);
 295                 }
 296                 for (; i < 2 && cnt > 0; ++i) {
 297                         data = (data >> 8) | (*src++ << 8);
 298                         --cnt;
 299                         ++cp;
 300                 }
 301                 for (; cnt == 0 && i < 2; ++i, ++cp) {
 302                         data = (data >> 8) | (*(uchar *) cp << 8);
 303                 }
 304
 305                 if ((rc = write_word (info, wp, data)) != 0) {
 306                         return (rc);
 307                 }
 308                 wp += 2;
 309         }
 310
 311         /*
 312          * handle word aligned part
 313          */
 314         while (cnt >= 2) {
 315                 data = *((vu_short *) src);
 316                 if ((rc = write_word (info, wp, data)) != 0) {
 317                         return (rc);
 318                 }
 319                 src += 2;
 320                 wp += 2;
 321                 cnt -= 2;
 322         }
 323
 324         if (cnt == 0) {
 325                 return ERR_OK;
 326         }
 327
 328         /*
 329          * handle unaligned tail bytes
 330          */
 331         data = 0;
 332         for (i = 0, cp = wp; i < 2 && cnt > 0; ++i, ++cp) {
 333                 data = (data >> 8) | (*src++ << 8);
 334                 --cnt;
 335         }
 336         for (; i < 2; ++i, ++cp) {
 337                 data = (data >> 8) | (*(uchar *) cp << 8);
 338         }
 339
 340         return write_word (info, wp, data);
 341 }