board/cradle/flash.c

   1 /*
   2  * (C) Copyright 2002
   3  * Kyle Harris, Nexus Technologies, Inc. kharris@nexus-tech.net
   4  *
   5  * (C) Copyright 2002
   6  * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
   7  * Marius Groeger <mgroeger@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
  30 #define FLASH_BANK_SIZE 0x400000
  31 #define MAIN_SECT_SIZE  0x20000
  32
  33 flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS];
  34
  35
  36 /*-----------------------------------------------------------------------
  37  */
  38
  39 ulong flash_init (void)
  40 {
  41         int i, j;
  42         ulong size = 0;
  43
  44         for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; i++) {
  45                 ulong flashbase = 0;
  46
  47                 flash_info[i].flash_id =
  48                         (INTEL_MANUFACT & FLASH_VENDMASK) |
  49                         (INTEL_ID_28F128J3 & FLASH_TYPEMASK);
  50                 flash_info[i].size = FLASH_BANK_SIZE;
  51                 flash_info[i].sector_count = CONFIG_SYS_MAX_FLASH_SECT;
  52                 memset (flash_info[i].protect, 0, CONFIG_SYS_MAX_FLASH_SECT);
  53                 switch (i) {
  54                 case 0:
  55                         flashbase = PHYS_FLASH_1;
  56                         break;
  57                 case 1:
  58                         flashbase = PHYS_FLASH_2;
  59                         break;
  60                 default:
  61                         panic ("configured too many flash banks!\n");
  62                         break;
  63                 }
  64                 for (j = 0; j < flash_info[i].sector_count; j++) {
  65                         flash_info[i].start[j] =
  66                                 flashbase + j * MAIN_SECT_SIZE;
  67                 }
  68                 size += flash_info[i].size;
  69         }
  70
  71         /* Protect monitor and environment sectors
  72          */
  73         flash_protect (FLAG_PROTECT_SET,
  74                        CONFIG_SYS_FLASH_BASE,
  75                        CONFIG_SYS_FLASH_BASE + monitor_flash_len - 1,
  76                        &flash_info[0]);
  77
  78         flash_protect (FLAG_PROTECT_SET,
  79                        CONFIG_ENV_ADDR,
  80                        CONFIG_ENV_ADDR + CONFIG_ENV_SIZE - 1, &flash_info[0]);
  81
  82         return size;
  83 }
  84
  85 /*-----------------------------------------------------------------------
  86  */
  87 void flash_print_info (flash_info_t * info)
  88 {
  89         int i, j;
  90
  91         for (j = 0; j < CONFIG_SYS_MAX_FLASH_BANKS; j++) {
  92                 switch (info->flash_id & FLASH_VENDMASK) {
  93                 case (INTEL_MANUFACT & FLASH_VENDMASK):
  94                         printf ("Intel: ");
  95                         break;
  96                 default:
  97                         printf ("Unknown Vendor ");
  98                         break;
  99                 }
 100
 101                 switch (info->flash_id & FLASH_TYPEMASK) {
 102                 case (INTEL_ID_28F320J3A & FLASH_TYPEMASK):
 103                         printf ("28F320J3A (32Mbit)\n");
 104                         break;
 105                 case (INTEL_ID_28F128J3 & FLASH_TYPEMASK):
 106                         printf ("28F128J3 (128Mbit)\n");
 107                         break;
 108                 default:
 109                         printf ("Unknown Chip Type\n");
 110                         goto Done;
 111                         break;
 112                 }
 113
 114                 printf ("  Size: %ld MB in %d Sectors\n",
 115                         info->size >> 20, info->sector_count);
 116
 117                 printf ("  Sector Start Addresses:");
 118                 for (i = 0; i < info->sector_count; i++) {
 119                         if ((i % 5) == 0) {
 120                                 printf ("\n   ");
 121                         }
 122                         printf (" %08lX%s", info->start[i],
 123                                 info->protect[i] ? " (RO)" : "     ");
 124                 }
 125                 printf ("\n");
 126                 info++;
 127         }
 128
 129 Done:   ;
 130 }
 131
 132 /*-----------------------------------------------------------------------
 133  */
 134
 135 int flash_erase (flash_info_t * info, int s_first, int s_last)
 136 {
 137         int flag, prot, sect;
 138         int rc = ERR_OK;
 139
 140         if (info->flash_id == FLASH_UNKNOWN)
 141                 return ERR_UNKNOWN_FLASH_TYPE;
 142
 143         if ((s_first < 0) || (s_first > s_last)) {
 144                 return ERR_INVAL;
 145         }
 146
 147         if ((info->flash_id & FLASH_VENDMASK) !=
 148             (INTEL_MANUFACT & FLASH_VENDMASK)) {
 149                 return ERR_UNKNOWN_FLASH_VENDOR;
 150         }
 151
 152         prot = 0;
 153         for (sect = s_first; sect <= s_last; ++sect) {
 154                 if (info->protect[sect]) {
 155                         prot++;
 156                 }
 157         }
 158         if (prot)
 159                 return ERR_PROTECTED;
 160
 161         /*
 162          * Disable interrupts which might cause a timeout
 163          * here. Remember that our exception vectors are
 164          * at address 0 in the flash, and we don't want a
 165          * (ticker) exception to happen while the flash
 166          * chip is in programming mode.
 167          */
 168         flag = disable_interrupts ();
 169
 170         /* Start erase on unprotected sectors */
 171         for (sect = s_first; sect <= s_last && !ctrlc (); sect++) {
 172
 173                 printf ("Erasing sector %2d ... ", sect);
 174
 175                 /* arm simple, non interrupt dependent timer */
 176                 reset_timer_masked ();
 177
 178                 if (info->protect[sect] == 0) { /* not protected */
 179                         vu_short *addr = (vu_short *) (info->start[sect]);
 180
 181                         *addr = 0x20;   /* erase setup */
 182                         *addr = 0xD0;   /* erase confirm */
 183
 184                         while ((*addr & 0x80) != 0x80) {
 185                                 if (get_timer_masked () >
 186                                     CONFIG_SYS_FLASH_ERASE_TOUT) {
 187                                         *addr = 0xB0;   /* suspend erase */
 188                                         *addr = 0xFF;   /* reset to read mode */
 189                                         rc = ERR_TIMOUT;
 190                                         goto outahere;
 191                                 }
 192                         }
 193
 194                         /* clear status register command */
 195                         *addr = 0x50;
 196                         /* reset to read mode */
 197                         *addr = 0xFF;
 198                 }
 199                 printf ("ok.\n");
 200         }
 201         if (ctrlc ())
 202                 printf ("User Interrupt!\n");
 203
 204 outahere:
 205
 206         /* allow flash to settle - wait 10 ms */
 207         udelay_masked (10000);
 208
 209         if (flag)
 210                 enable_interrupts ();
 211
 212         return rc;
 213 }
 214
 215 /*-----------------------------------------------------------------------
 216  * Copy memory to flash
 217  */
 218
 219 static int write_word (flash_info_t * info, ulong dest, ushort data)
 220 {
 221         vu_short *addr = (vu_short *) dest, val;
 222         int rc = ERR_OK;
 223         int flag;
 224
 225         /* Check if Flash is (sufficiently) erased
 226          */
 227         if ((*addr & data) != data)
 228                 return ERR_NOT_ERASED;
 229
 230         /*
 231          * Disable interrupts which might cause a timeout
 232          * here. Remember that our exception vectors are
 233          * at address 0 in the flash, and we don't want a
 234          * (ticker) exception to happen while the flash
 235          * chip is in programming mode.
 236          */
 237         flag = disable_interrupts ();
 238
 239         /* clear status register command */
 240         *addr = 0x50;
 241
 242         /* program set-up command */
 243         *addr = 0x40;
 244
 245         /* latch address/data */
 246         *addr = data;
 247
 248         /* arm simple, non interrupt dependent timer */
 249         reset_timer_masked ();
 250
 251         /* wait while polling the status register */
 252         while (((val = *addr) & 0x80) != 0x80) {
 253                 if (get_timer_masked () > CONFIG_SYS_FLASH_WRITE_TOUT) {
 254                         rc = ERR_TIMOUT;
 255                         /* suspend program command */
 256                         *addr = 0xB0;
 257                         goto outahere;
 258                 }
 259         }
 260
 261         if (val & 0x1A) {       /* check for error */
 262                 printf ("\nFlash write error %02x at address %08lx\n",
 263                         (int) val, (unsigned long) dest);
 264                 if (val & (1 << 3)) {
 265                         printf ("Voltage range error.\n");
 266                         rc = ERR_PROG_ERROR;
 267                         goto outahere;
 268                 }
 269                 if (val & (1 << 1)) {
 270                         printf ("Device protect error.\n");
 271                         rc = ERR_PROTECTED;
 272                         goto outahere;
 273                 }
 274                 if (val & (1 << 4)) {
 275                         printf ("Programming error.\n");
 276                         rc = ERR_PROG_ERROR;
 277                         goto outahere;
 278                 }
 279                 rc = ERR_PROG_ERROR;
 280                 goto outahere;
 281         }
 282
 283 outahere:
 284         /* read array command */
 285         *addr = 0xFF;
 286
 287         if (flag)
 288                 enable_interrupts ();
 289
 290         return rc;
 291 }
 292
 293 /*-----------------------------------------------------------------------
 294  * Copy memory to flash.
 295  */
 296
 297 int write_buff (flash_info_t * info, uchar * src, ulong addr, ulong cnt)
 298 {
 299         ulong cp, wp;
 300         ushort data;
 301         int l;
 302         int i, rc;
 303
 304         wp = (addr & ~1);       /* get lower word aligned address */
 305
 306         /*
 307          * handle unaligned start bytes
 308          */
 309         if ((l = addr - wp) != 0) {
 310                 data = 0;
 311                 for (i = 0, cp = wp; i < l; ++i, ++cp) {
 312                         data = (data >> 8) | (*(uchar *) cp << 8);
 313                 }
 314                 for (; i < 2 && cnt > 0; ++i) {
 315                         data = (data >> 8) | (*src++ << 8);
 316                         --cnt;
 317                         ++cp;
 318                 }
 319                 for (; cnt == 0 && i < 2; ++i, ++cp) {
 320                         data = (data >> 8) | (*(uchar *) cp << 8);
 321                 }
 322
 323                 if ((rc = write_word (info, wp, data)) != 0) {
 324                         return (rc);
 325                 }
 326                 wp += 2;
 327         }
 328
 329         /*
 330          * handle word aligned part
 331          */
 332         while (cnt >= 2) {
 333                 data = *((vu_short *) src);
 334                 if ((rc = write_word (info, wp, data)) != 0) {
 335                         return (rc);
 336                 }
 337                 src += 2;
 338                 wp += 2;
 339                 cnt -= 2;
 340         }
 341
 342         if (cnt == 0) {
 343                 return ERR_OK;
 344         }
 345
 346         /*
 347          * handle unaligned tail bytes
 348          */
 349         data = 0;
 350         for (i = 0, cp = wp; i < 2 && cnt > 0; ++i, ++cp) {
 351                 data = (data >> 8) | (*src++ << 8);
 352                 --cnt;
 353         }
 354         for (; i < 2; ++i, ++cp) {
 355                 data = (data >> 8) | (*(uchar *) cp << 8);
 356         }
 357
 358         return write_word (info, wp, data);
 359 }