board/idmr/flash.c

   1 /*
   2  * (C) Copyright 2000-2006
   3  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   4  *
   5  * SPDX-License-Identifier:     GPL-2.0+
   6  */
   7
   8 #include <common.h>
   9
  10 #define PHYS_FLASH_1 CONFIG_SYS_FLASH_BASE
  11 #define FLASH_BANK_SIZE 0x800000
  12 #define EN29LV640 0x227e227e
  13
  14 flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS];
  15
  16 void flash_print_info (flash_info_t * info)
  17 {
  18         int i;
  19
  20         switch (info->flash_id & FLASH_VENDMASK) {
  21         case (AMD_MANUFACT & FLASH_VENDMASK):
  22                 printf ("AMD: ");
  23                 break;
  24         default:
  25                 printf ("Unknown Vendor ");
  26                 break;
  27         }
  28
  29         switch (info->flash_id & FLASH_TYPEMASK) {
  30         case (EN29LV640 & FLASH_TYPEMASK):
  31                 printf ("EN29LV640 (16Mbit)\n");
  32                 break;
  33         default:
  34                 printf ("Unknown Chip Type\n");
  35                 goto Done;
  36                 break;
  37         }
  38
  39         printf ("  Size: %ld MB in %d Sectors\n",
  40                 info->size >> 20, info->sector_count);
  41
  42         printf ("  Sector Start Addresses:");
  43         for (i = 0; i < info->sector_count; i++) {
  44                 if ((i % 5) == 0) {
  45                         printf ("\n   ");
  46                 }
  47                 printf (" %08lX%s", info->start[i],
  48                         info->protect[i] ? " (RO)" : "     ");
  49         }
  50         printf ("\n");
  51
  52       Done:
  53         return;
  54 }
  55
  56
  57 unsigned long flash_init (void)
  58 {
  59         int i, j;
  60         ulong size = 0;
  61
  62         for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; i++) {
  63                 ulong flashbase = 0;
  64
  65                 flash_info[i].flash_id =
  66                         (AMD_MANUFACT & FLASH_VENDMASK) |
  67                         (EN29LV640 & FLASH_TYPEMASK);
  68                 flash_info[i].size = FLASH_BANK_SIZE;
  69                 flash_info[i].sector_count = CONFIG_SYS_MAX_FLASH_SECT;
  70                 memset (flash_info[i].protect, 0, CONFIG_SYS_MAX_FLASH_SECT);
  71                 if (i == 0)
  72                         flashbase = PHYS_FLASH_1;
  73                 else
  74                         panic ("configured to many flash banks!\n");
  75
  76                 for (j = 0; j < flash_info[i].sector_count; j++) {
  77                         flash_info[i].start[j] = flashbase + 0x10000 * j;
  78                 }
  79                 size += flash_info[i].size;
  80         }
  81
  82         flash_protect (FLAG_PROTECT_SET,
  83                        CONFIG_SYS_FLASH_BASE,
  84                        CONFIG_SYS_FLASH_BASE + 0x2ffff, &flash_info[0]);
  85
  86         return size;
  87 }
  88
  89
  90 #define CMD_READ_ARRAY          0x00F0
  91 #define CMD_UNLOCK1             0x00AA
  92 #define CMD_UNLOCK2             0x0055
  93 #define CMD_ERASE_SETUP         0x0080
  94 #define CMD_ERASE_CONFIRM       0x0030
  95 #define CMD_PROGRAM             0x00A0
  96 #define CMD_UNLOCK_BYPASS       0x0020
  97
  98 #define MEM_FLASH_ADDR1         (*(volatile u16 *)(CONFIG_SYS_FLASH_BASE + (0x00000555<<1)))
  99 #define MEM_FLASH_ADDR2         (*(volatile u16 *)(CONFIG_SYS_FLASH_BASE + (0x000002AA<<1)))
 100
 101 #define BIT_ERASE_DONE          0x0080
 102 #define BIT_RDY_MASK            0x0080
 103 #define BIT_PROGRAM_ERROR       0x0020
 104 #define BIT_TIMEOUT             0x80000000      /* our flag */
 105
 106 #define READY 1
 107 #define ERR   2
 108 #define TMO   4
 109
 110
 111 int flash_erase (flash_info_t * info, int s_first, int s_last)
 112 {
 113         ulong result;
 114         int iflag, prot, sect;
 115         int rc = ERR_OK;
 116         int chip1;
 117         ulong start;
 118
 119         /* first look for protection bits */
 120
 121         if (info->flash_id == FLASH_UNKNOWN)
 122                 return ERR_UNKNOWN_FLASH_TYPE;
 123
 124         if ((s_first < 0) || (s_first > s_last)) {
 125                 return ERR_INVAL;
 126         }
 127
 128         if ((info->flash_id & FLASH_VENDMASK) !=
 129             (AMD_MANUFACT & FLASH_VENDMASK)) {
 130                 return ERR_UNKNOWN_FLASH_VENDOR;
 131         }
 132
 133         prot = 0;
 134         for (sect = s_first; sect <= s_last; ++sect) {
 135                 if (info->protect[sect]) {
 136                         prot++;
 137                 }
 138         }
 139         if (prot)
 140                 return ERR_PROTECTED;
 141
 142         /*
 143          * Disable interrupts which might cause a timeout
 144          * here. Remember that our exception vectors are
 145          * at address 0 in the flash, and we don't want a
 146          * (ticker) exception to happen while the flash
 147          * chip is in programming mode.
 148          */
 149         iflag = disable_interrupts ();
 150
 151         printf ("\n");
 152
 153         /* Start erase on unprotected sectors */
 154         for (sect = s_first; sect <= s_last && !ctrlc (); sect++) {
 155                 printf ("Erasing sector %2d ... ", sect);
 156
 157                 /* arm simple, non interrupt dependent timer */
 158                 start = get_timer(0);
 159
 160                 if (info->protect[sect] == 0) { /* not protected */
 161                         volatile u16 *addr =
 162                                 (volatile u16 *) (info->start[sect]);
 163
 164                         MEM_FLASH_ADDR1 = CMD_UNLOCK1;
 165                         MEM_FLASH_ADDR2 = CMD_UNLOCK2;
 166                         MEM_FLASH_ADDR1 = CMD_ERASE_SETUP;
 167
 168                         MEM_FLASH_ADDR1 = CMD_UNLOCK1;
 169                         MEM_FLASH_ADDR2 = CMD_UNLOCK2;
 170                         *addr = CMD_ERASE_CONFIRM;
 171
 172                         /* wait until flash is ready */
 173                         chip1 = 0;
 174
 175                         do {
 176                                 result = *addr;
 177
 178                                 /* check timeout */
 179                                 if (get_timer(start) > CONFIG_SYS_FLASH_ERASE_TOUT * CONFIG_SYS_HZ / 1000) {
 180                                         MEM_FLASH_ADDR1 = CMD_READ_ARRAY;
 181                                         chip1 = TMO;
 182                                         break;
 183                                 }
 184
 185                                 if (!chip1
 186                                     && (result & 0xFFFF) & BIT_ERASE_DONE)
 187                                         chip1 = READY;
 188
 189                         } while (!chip1);
 190
 191                         MEM_FLASH_ADDR1 = CMD_READ_ARRAY;
 192
 193                         if (chip1 == ERR) {
 194                                 rc = ERR_PROG_ERROR;
 195                                 goto outahere;
 196                         }
 197                         if (chip1 == TMO) {
 198                                 rc = ERR_TIMOUT;
 199                                 goto outahere;
 200                         }
 201
 202                         printf ("ok.\n");
 203                 } else {        /* it was protected */
 204
 205                         printf ("protected!\n");
 206                 }
 207         }
 208
 209         if (ctrlc ())
 210                 printf ("User Interrupt!\n");
 211
 212       outahere:
 213         /* allow flash to settle - wait 10 ms */
 214         printf("Waiting 10 ms...");
 215          udelay (10000);
 216
 217 /*      for (i = 0; i < 10 * 1000 * 1000; ++i)
 218                 asm(" nop");
 219 */
 220
 221         printf("done\n");
 222         if (iflag)
 223                 enable_interrupts ();
 224
 225
 226         return rc;
 227 }
 228
 229 static int write_word (flash_info_t * info, ulong dest, ulong data)
 230 {
 231         volatile u16 *addr = (volatile u16 *) dest;
 232         ulong result;
 233         int rc = ERR_OK;
 234         int iflag;
 235         int chip1;
 236         ulong start;
 237
 238         /*
 239          * Check if Flash is (sufficiently) erased
 240          */
 241         result = *addr;
 242         if ((result & data) != data)
 243                 return ERR_NOT_ERASED;
 244
 245
 246         /*
 247          * Disable interrupts which might cause a timeout
 248          * here. Remember that our exception vectors are
 249          * at address 0 in the flash, and we don't want a
 250          * (ticker) exception to happen while the flash
 251          * chip is in programming mode.
 252          */
 253         iflag = disable_interrupts ();
 254
 255         MEM_FLASH_ADDR1 = CMD_UNLOCK1;
 256         MEM_FLASH_ADDR2 = CMD_UNLOCK2;
 257         MEM_FLASH_ADDR1 = CMD_PROGRAM;
 258         *addr = data;
 259
 260         /* arm simple, non interrupt dependent timer */
 261         start = get_timer(0);
 262
 263         /* wait until flash is ready */
 264         chip1 = 0;
 265         do {
 266                 result = *addr;
 267
 268                 /* check timeout */
 269                 if (get_timer(start) > CONFIG_SYS_FLASH_ERASE_TOUT * CONFIG_SYS_HZ / 1000) {
 270                         chip1 = ERR | TMO;
 271                         break;
 272                 }
 273                 if (!chip1 && ((result & 0x80) == (data & 0x80)))
 274                         chip1 = READY;
 275
 276         } while (!chip1);
 277
 278         *addr = CMD_READ_ARRAY;
 279
 280         if (chip1 == ERR || *addr != data)
 281                 rc = ERR_PROG_ERROR;
 282
 283         if (iflag)
 284                 enable_interrupts ();
 285
 286         return rc;
 287 }
 288
 289
 290 int write_buff (flash_info_t * info, uchar * src, ulong addr, ulong cnt)
 291 {
 292         ulong wp, data;
 293         int rc;
 294
 295         if (addr & 1) {
 296                 printf ("unaligned destination not supported\n");
 297                 return ERR_ALIGN;
 298         }
 299
 300 #if 0
 301         if (cnt & 1) {
 302                 printf ("odd transfer sizes not supported\n");
 303                 return ERR_ALIGN;
 304         }
 305 #endif
 306
 307         wp = addr;
 308
 309         if (addr & 1) {
 310                 data = (*((volatile u8 *) addr) << 8) | *((volatile u8 *)
 311                                                           src);
 312                 if ((rc = write_word (info, wp - 1, data)) != 0) {
 313                         return (rc);
 314                 }
 315                 src += 1;
 316                 wp += 1;
 317                 cnt -= 1;
 318         }
 319
 320         while (cnt >= 2) {
 321                 data = *((volatile u16 *) src);
 322                 if ((rc = write_word (info, wp, data)) != 0) {
 323                         return (rc);
 324                 }
 325                 src += 2;
 326                 wp += 2;
 327                 cnt -= 2;
 328         }
 329
 330         if (cnt == 1) {
 331                 data = (*((volatile u8 *) src) << 8) |
 332                         *((volatile u8 *) (wp + 1));
 333                 if ((rc = write_word (info, wp, data)) != 0) {
 334                         return (rc);
 335                 }
 336                 src += 1;
 337                 wp += 1;
 338                 cnt -= 1;
 339         }
 340
 341         return ERR_OK;
 342 }