board/csb226/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  * (C) Copyright 2002
  10  * Robert Schwebel, Pengutronix, <r.schwebel@pengutronix.de>
  11  *
  12  * (C) Copyright 2003 (2 x 16 bit Flash bank patches)
  13  * Rolf Peukert, IMMS gGmbH, <rolf.peukert@imms.de>
  14  *
  15  * See file CREDITS for list of people who contributed to this
  16  * project.
  17  *
  18  * This program is free software; you can redistribute it and/or
  19  * modify it under the terms of the GNU General Public License as
  20  * published by the Free Software Foundation; either version 2 of
  21  * the License, or (at your option) any later version.
  22  *
  23  * This program is distributed in the hope that it will be useful,
  24  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  25  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  26  * GNU General Public License for more details.
  27  *
  28  * You should have received a copy of the GNU General Public License
  29  * along with this program; if not, write to the Free Software
  30  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  31  * MA 02111-1307 USA
  32  */
  33
  34 #include <common.h>
  35 #include <asm/arch/pxa-regs.h>
  36
  37 #define FLASH_BANK_SIZE 0x02000000
  38 #define MAIN_SECT_SIZE  0x40000         /* 2x16 = 256k per sector */
  39
  40 flash_info_t    flash_info[CFG_MAX_FLASH_BANKS];
  41
  42
  43 /**
  44  * flash_init: - initialize data structures for flash chips
  45  *
  46  * @return: size of the flash
  47  */
  48
  49 ulong flash_init(void)
  50 {
  51         int i, j;
  52         ulong size = 0;
  53
  54         for (i = 0; i < CFG_MAX_FLASH_BANKS; i++) {
  55                 ulong flashbase = 0;
  56                 flash_info[i].flash_id =
  57                         (INTEL_MANUFACT & FLASH_VENDMASK) |
  58                         (INTEL_ID_28F128J3 & FLASH_TYPEMASK);
  59                 flash_info[i].size = FLASH_BANK_SIZE;
  60                 flash_info[i].sector_count = CFG_MAX_FLASH_SECT;
  61                 memset(flash_info[i].protect, 0, CFG_MAX_FLASH_SECT);
  62
  63                 switch (i) {
  64                 case 0:
  65                         flashbase = PHYS_FLASH_1;
  66                         break;
  67                 default:
  68                         panic("configured too many flash banks!\n");
  69                         break;
  70                 }
  71                 for (j = 0; j < flash_info[i].sector_count; j++) {
  72                         flash_info[i].start[j] = flashbase + j*MAIN_SECT_SIZE;
  73                 }
  74                 size += flash_info[i].size;
  75         }
  76
  77         /* Protect monitor and environment sectors */
  78         flash_protect(FLAG_PROTECT_SET,
  79                         CFG_FLASH_BASE,
  80                         CFG_FLASH_BASE + monitor_flash_len - 1,
  81                         &flash_info[0]);
  82
  83         flash_protect(FLAG_PROTECT_SET,
  84                         CFG_ENV_ADDR,
  85                         CFG_ENV_ADDR + CFG_ENV_SIZE - 1,
  86                         &flash_info[0]);
  87
  88         return size;
  89 }
  90
  91
  92 /**
  93  * flash_print_info: - print information about the flash situation
  94  */
  95
  96 void flash_print_info  (flash_info_t *info)
  97 {
  98         int i, j;
  99
 100         for (j=0; j<CFG_MAX_FLASH_BANKS; j++) {
 101
 102                 switch (info->flash_id & FLASH_VENDMASK) {
 103                 case (INTEL_MANUFACT & FLASH_VENDMASK):
 104                         printf ("Intel: ");
 105                         break;
 106                 default:
 107                         printf ("Unknown Vendor ");
 108                         break;
 109                 }
 110
 111                 switch (info->flash_id & FLASH_TYPEMASK) {
 112                 case (INTEL_ID_28F128J3 & FLASH_TYPEMASK):
 113                         printf("28F128J3 (128Mbit)\n");
 114                         break;
 115                 default:
 116                         printf("Unknown Chip Type\n");
 117                         return;
 118                 }
 119
 120                 printf("  Size: %ld MB in %d Sectors\n",
 121                         info->size >> 20, info->sector_count);
 122
 123                 printf("  Sector Start Addresses:");
 124                 for (i = 0; i < info->sector_count; i++) {
 125                         if ((i % 5) == 0) printf ("\n   ");
 126
 127                         printf (" %08lX%s", info->start[i],
 128                                 info->protect[i] ? " (RO)" : "     ");
 129                 }
 130                 printf ("\n");
 131                 info++;
 132         }
 133 }
 134
 135
 136 /**
 137  * flash_erase: - erase flash sectors
 138  */
 139
 140 int flash_erase(flash_info_t *info, int s_first, int s_last)
 141 {
 142         int flag, prot, sect;
 143         int rc = ERR_OK;
 144
 145         if (info->flash_id == FLASH_UNKNOWN)
 146                 return ERR_UNKNOWN_FLASH_TYPE;
 147
 148         if ((s_first < 0) || (s_first > s_last)) {
 149                 return ERR_INVAL;
 150         }
 151
 152         if ((info->flash_id & FLASH_VENDMASK) != (INTEL_MANUFACT & FLASH_VENDMASK))
 153                 return ERR_UNKNOWN_FLASH_VENDOR;
 154
 155         prot = 0;
 156         for (sect=s_first; sect<=s_last; ++sect) {
 157                 if (info->protect[sect]) prot++;
 158         }
 159
 160         if (prot) return ERR_PROTECTED;
 161
 162         /*
 163          * Disable interrupts which might cause a timeout
 164          * here. Remember that our exception vectors are
 165          * at address 0 in the flash, and we don't want a
 166          * (ticker) exception to happen while the flash
 167          * chip is in programming mode.
 168          */
 169
 170         flag = disable_interrupts();
 171
 172         /* Start erase on unprotected sectors */
 173         for (sect = s_first; sect<=s_last && !ctrlc(); sect++) {
 174
 175                 printf("Erasing sector %2d ... ", sect);
 176
 177                 /* arm simple, non interrupt dependent timer */
 178                 reset_timer_masked();
 179
 180                 if (info->protect[sect] == 0) { /* not protected */
 181                         u32 * volatile addr = (u32 * volatile)(info->start[sect]);
 182
 183                         /* erase sector:                                    */
 184                         /* The strata flashs are aligned side by side on    */
 185                         /* the data bus, so we have to write the commands   */
 186                         /* to both chips here:                              */
 187
 188                         *addr = 0x00200020;     /* erase setup */
 189                         *addr = 0x00D000D0;     /* erase confirm */
 190
 191                         while ((*addr & 0x00800080) != 0x00800080) {
 192                                 if (get_timer_masked() > CFG_FLASH_ERASE_TOUT) {
 193                                         *addr = 0x00B000B0; /* suspend erase*/
 194                                         *addr = 0x00FF00FF; /* read mode    */
 195                                         rc = ERR_TIMOUT;
 196                                         goto outahere;
 197                                 }
 198                         }
 199                         *addr = 0x00500050; /* clear status register cmd.   */
 200                         *addr = 0x00FF00FF; /* reset to read mode           */
 201                 }
 202                 printf("ok.\n");
 203         }
 204         if (ctrlc()) printf("User Interrupt!\n");
 205
 206 outahere:
 207         /* allow flash to settle - wait 10 ms */
 208         udelay_masked(10000);
 209
 210         if (flag) enable_interrupts();
 211
 212         return rc;
 213 }
 214
 215 /**
 216  * write_long: - copy memory to flash, assume a bank of 2 devices with 16bit each
 217  */
 218
 219 static int write_long (flash_info_t *info, ulong dest, ulong data)
 220 {
 221         u32 * volatile addr = (u32 * volatile)dest, val;
 222         int rc = ERR_OK;
 223         int flag;
 224
 225         /* read array command - just for the case... */
 226         *addr = 0x00FF00FF;
 227
 228         /* Check if Flash is (sufficiently) erased */
 229         if ((*addr & data) != data) return ERR_NOT_ERASED;
 230
 231         /*
 232          * Disable interrupts which might cause a timeout
 233          * here. Remember that our exception vectors are
 234          * at address 0 in the flash, and we don't want a
 235          * (ticker) exception to happen while the flash
 236          * chip is in programming mode.
 237          */
 238         flag = disable_interrupts();
 239
 240         /* clear status register command */
 241         *addr = 0x00500050;
 242
 243         /* program set-up command */
 244         *addr = 0x00400040;
 245
 246         /* latch address/data */
 247         *addr = data;
 248
 249         /* arm simple, non interrupt dependent timer */
 250         reset_timer_masked();
 251
 252         /* wait while polling the status register */
 253         while(((val = *addr) & 0x00800080) != 0x00800080) {
 254                 if (get_timer_masked() > CFG_FLASH_WRITE_TOUT) {
 255                         rc = ERR_TIMOUT;
 256                         /* suspend program command */
 257                         *addr = 0x00B000B0;
 258                         goto outahere;
 259                 }
 260         }
 261
 262         /* check for errors */
 263         if(val & 0x001A001A) {
 264                 printf("\nFlash write error %02x at address %08lx\n",
 265                         (int)val, (unsigned long)dest);
 266                 if(val & 0x00080008) {
 267                         printf("Voltage range error.\n");
 268                         rc = ERR_PROG_ERROR;
 269                         goto outahere;
 270                 }
 271                 if(val & 0x00020002) {
 272                         printf("Device protect error.\n");
 273                         rc = ERR_PROTECTED;
 274                         goto outahere;
 275                 }
 276                 if(val & 0x00100010) {
 277                         printf("Programming error.\n");
 278                         rc = ERR_PROG_ERROR;
 279                         goto outahere;
 280                 }
 281                 rc = ERR_PROG_ERROR;
 282                 goto outahere;
 283         }
 284
 285 outahere:
 286         /* read array command */
 287         *addr = 0x00FF00FF;
 288         if (flag) enable_interrupts();
 289
 290         return rc;
 291 }
 292
 293
 294 /**
 295  * write_buf: - Copy memory to flash.
 296  *
 297  * @param info:
 298  * @param src:  source of copy transaction
 299  * @param addr: where to copy to
 300  * @param cnt:  number of bytes to copy
 301  *
 302  * @return      error code
 303  */
 304
 305 /* "long" version, uses 32bit words */
 306 int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt)
 307 {
 308         ulong cp, wp;
 309         ulong data;
 310         int l;
 311         int i, rc;
 312
 313         wp = (addr & ~3);       /* get lower word aligned address */
 314
 315         /*
 316          * handle unaligned start bytes
 317          */
 318         if ((l = addr - wp) != 0) {
 319                 data = 0;
 320                 for (i=0, cp=wp; i<l; ++i, ++cp) {
 321                         data = (data >> 8) | (*(uchar *)cp << 24);
 322                 }
 323                 for (; i<4 && cnt>0; ++i) {
 324                         data = (data >> 8) | (*src++ << 24);
 325                         --cnt;
 326                         ++cp;
 327                 }
 328                 for (; cnt==0 && i<4; ++i, ++cp) {
 329                         data = (data >> 8) | (*(uchar *)cp << 24);
 330                 }
 331
 332                 if ((rc = write_long(info, wp, data)) != 0) {
 333                         return (rc);
 334                 }
 335                 wp += 4;
 336         }
 337
 338         /*
 339          * handle word aligned part
 340          */
 341         while (cnt >= 4) {
 342                 data = *((ulong*)src);
 343                 if ((rc = write_long(info, wp, data)) != 0) {
 344                         return (rc);
 345                 }
 346                 src += 4;
 347                 wp  += 4;
 348                 cnt -= 4;
 349         }
 350
 351         if (cnt == 0) return ERR_OK;
 352
 353         /*
 354          * handle unaligned tail bytes
 355          */
 356         data = 0;
 357         for (i=0, cp=wp; i<4 && cnt>0; ++i, ++cp) {
 358                 data = (data >> 8) | (*src++ << 24);
 359                 --cnt;
 360         }
 361         for (; i<4; ++i, ++cp) {
 362                 data = (data >> 8) | (*(uchar *)cp << 24);
 363         }
 364
 365         return write_long(info, wp, data);
 366 }