board/cobra5272/flash.c

   1 /*
   2  * (C) Copyright 2000-2003
   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 0x200000
  12
  13 flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS];
  14
  15 void flash_print_info (flash_info_t * info)
  16 {
  17         int i;
  18
  19         switch (info->flash_id & FLASH_VENDMASK) {
  20         case (AMD_MANUFACT & FLASH_VENDMASK):
  21                 printf ("AMD: ");
  22                 break;
  23         default:
  24                 printf ("Unknown Vendor ");
  25                 break;
  26         }
  27
  28         switch (info->flash_id & FLASH_TYPEMASK) {
  29         case (AMD_ID_PL160CB & FLASH_TYPEMASK):
  30                 printf ("AM29PL160CB (16Mbit)\n");
  31                 break;
  32         default:
  33                 printf ("Unknown Chip Type\n");
  34                 goto Done;
  35                 break;
  36         }
  37
  38         printf ("  Size: %ld MB in %d Sectors\n",
  39                 info->size >> 20, info->sector_count);
  40
  41         printf ("  Sector Start Addresses:");
  42         for (i = 0; i < info->sector_count; i++) {
  43                 if ((i % 5) == 0) {
  44                         printf ("\n   ");
  45                 }
  46                 printf (" %08lX%s", info->start[i],
  47                         info->protect[i] ? " (RO)" : "     ");
  48         }
  49         printf ("\n");
  50
  51 Done:
  52         return;
  53 }
  54
  55
  56 unsigned long flash_init (void)
  57 {
  58         int i, j;
  59         ulong size = 0;
  60
  61         for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; i++) {
  62                 ulong flashbase = 0;
  63
  64                 flash_info[i].flash_id =
  65                         (AMD_MANUFACT & FLASH_VENDMASK) |
  66                         (AMD_ID_PL160CB & FLASH_TYPEMASK);
  67                 flash_info[i].size = FLASH_BANK_SIZE;
  68                 flash_info[i].sector_count = CONFIG_SYS_MAX_FLASH_SECT;
  69                 memset (flash_info[i].protect, 0, CONFIG_SYS_MAX_FLASH_SECT);
  70                 if (i == 0)
  71                         flashbase = PHYS_FLASH_1;
  72                 else
  73                         panic ("configured to many flash banks!\n");
  74
  75                 for (j = 0; j < flash_info[i].sector_count; j++) {
  76                         if (j == 0) {
  77                                 /* 1st is 16 KiB */
  78                                 flash_info[i].start[j] = flashbase;
  79                         }
  80                         if ((j >= 1) && (j <= 2)) {
  81                                 /* 2nd and 3rd are 8 KiB */
  82                                 flash_info[i].start[j] =
  83                                         flashbase + 0x4000 + 0x2000 * (j - 1);
  84                         }
  85                         if (j == 3) {
  86                                 /* 4th is 224 KiB */
  87                                 flash_info[i].start[j] = flashbase + 0x8000;
  88                         }
  89                         if ((j >= 4) && (j <= 10)) {
  90                                 /* rest is 256 KiB */
  91                                 flash_info[i].start[j] =
  92                                         flashbase + 0x40000 + 0x40000 * (j -
  93                                                                          4);
  94                         }
  95                 }
  96                 size += flash_info[i].size;
  97         }
  98
  99         flash_protect (FLAG_PROTECT_SET,
 100                        CONFIG_SYS_FLASH_BASE,
 101                        CONFIG_SYS_FLASH_BASE + 0x3ffff, &flash_info[0]);
 102
 103         return size;
 104 }
 105
 106
 107 #define CMD_READ_ARRAY          0x00F0
 108 #define CMD_UNLOCK1             0x00AA
 109 #define CMD_UNLOCK2             0x0055
 110 #define CMD_ERASE_SETUP         0x0080
 111 #define CMD_ERASE_CONFIRM       0x0030
 112 #define CMD_PROGRAM             0x00A0
 113 #define CMD_UNLOCK_BYPASS       0x0020
 114
 115 #define MEM_FLASH_ADDR1         (*(volatile u16 *)(CONFIG_SYS_FLASH_BASE + (0x00000555<<1)))
 116 #define MEM_FLASH_ADDR2         (*(volatile u16 *)(CONFIG_SYS_FLASH_BASE + (0x000002AA<<1)))
 117
 118 #define BIT_ERASE_DONE          0x0080
 119 #define BIT_RDY_MASK            0x0080
 120 #define BIT_PROGRAM_ERROR       0x0020
 121 #define BIT_TIMEOUT             0x80000000      /* our flag */
 122
 123 #define READY 1
 124 #define ERR   2
 125 #define TMO   4
 126
 127
 128 int flash_erase (flash_info_t * info, int s_first, int s_last)
 129 {
 130         ulong result;
 131         int iflag, cflag, prot, sect;
 132         int rc = ERR_OK;
 133         int chip1;
 134         ulong start;
 135
 136         /* first look for protection bits */
 137
 138         if (info->flash_id == FLASH_UNKNOWN)
 139                 return ERR_UNKNOWN_FLASH_TYPE;
 140
 141         if ((s_first < 0) || (s_first > s_last)) {
 142                 return ERR_INVAL;
 143         }
 144
 145         if ((info->flash_id & FLASH_VENDMASK) !=
 146             (AMD_MANUFACT & FLASH_VENDMASK)) {
 147                 return ERR_UNKNOWN_FLASH_VENDOR;
 148         }
 149
 150         prot = 0;
 151         for (sect = s_first; sect <= s_last; ++sect) {
 152                 if (info->protect[sect]) {
 153                         prot++;
 154                 }
 155         }
 156         if (prot)
 157                 return ERR_PROTECTED;
 158
 159         /*
 160          * Disable interrupts which might cause a timeout
 161          * here. Remember that our exception vectors are
 162          * at address 0 in the flash, and we don't want a
 163          * (ticker) exception to happen while the flash
 164          * chip is in programming mode.
 165          */
 166
 167         cflag = icache_status ();
 168         icache_disable ();
 169         iflag = disable_interrupts ();
 170
 171         printf ("\n");
 172
 173         /* Start erase on unprotected sectors */
 174         for (sect = s_first; sect <= s_last && !ctrlc (); sect++) {
 175                 printf ("Erasing sector %2d ... ", sect);
 176
 177                 /* arm simple, non interrupt dependent timer */
 178                 start = get_timer(0);
 179
 180                 if (info->protect[sect] == 0) { /* not protected */
 181                         volatile u16 *addr =
 182                                 (volatile u16 *) (info->start[sect]);
 183
 184                         MEM_FLASH_ADDR1 = CMD_UNLOCK1;
 185                         MEM_FLASH_ADDR2 = CMD_UNLOCK2;
 186                         MEM_FLASH_ADDR1 = CMD_ERASE_SETUP;
 187
 188                         MEM_FLASH_ADDR1 = CMD_UNLOCK1;
 189                         MEM_FLASH_ADDR2 = CMD_UNLOCK2;
 190                         *addr = CMD_ERASE_CONFIRM;
 191
 192                         /* wait until flash is ready */
 193                         chip1 = 0;
 194
 195                         do {
 196                                 result = *addr;
 197
 198                                 /* check timeout */
 199                                 if (get_timer(start) > CONFIG_SYS_FLASH_ERASE_TOUT) {
 200                                         MEM_FLASH_ADDR1 = CMD_READ_ARRAY;
 201                                         chip1 = TMO;
 202                                         break;
 203                                 }
 204
 205                                 if (!chip1
 206                                     && (result & 0xFFFF) & BIT_ERASE_DONE)
 207                                         chip1 = READY;
 208
 209                         } while (!chip1);
 210
 211                         MEM_FLASH_ADDR1 = CMD_READ_ARRAY;
 212
 213                         if (chip1 == ERR) {
 214                                 rc = ERR_PROG_ERROR;
 215                                 goto outahere;
 216                         }
 217                         if (chip1 == TMO) {
 218                                 rc = ERR_TIMOUT;
 219                                 goto outahere;
 220                         }
 221
 222                         printf ("ok.\n");
 223                 } else {        /* it was protected */
 224
 225                         printf ("protected!\n");
 226                 }
 227         }
 228
 229         if (ctrlc ())
 230                 printf ("User Interrupt!\n");
 231
 232       outahere:
 233         /* allow flash to settle - wait 10 ms */
 234         udelay (10000);
 235
 236         if (iflag)
 237                 enable_interrupts ();
 238
 239         if (cflag)
 240                 icache_enable ();
 241
 242         return rc;
 243 }
 244
 245 static int write_word (flash_info_t * info, ulong dest, ulong data)
 246 {
 247         volatile u16 *addr = (volatile u16 *) dest;
 248         ulong result;
 249         int rc = ERR_OK;
 250         int cflag, iflag;
 251         int chip1;
 252         ulong start;
 253
 254         /*
 255          * Check if Flash is (sufficiently) erased
 256          */
 257         result = *addr;
 258         if ((result & data) != data)
 259                 return ERR_NOT_ERASED;
 260
 261
 262         /*
 263          * Disable interrupts which might cause a timeout
 264          * here. Remember that our exception vectors are
 265          * at address 0 in the flash, and we don't want a
 266          * (ticker) exception to happen while the flash
 267          * chip is in programming mode.
 268          */
 269
 270         cflag = icache_status ();
 271         icache_disable ();
 272         iflag = disable_interrupts ();
 273
 274         MEM_FLASH_ADDR1 = CMD_UNLOCK1;
 275         MEM_FLASH_ADDR2 = CMD_UNLOCK2;
 276         MEM_FLASH_ADDR1 = CMD_PROGRAM;
 277         *addr = data;
 278
 279         /* arm simple, non interrupt dependent timer */
 280         start = get_timer(0);
 281
 282         /* wait until flash is ready */
 283         chip1 = 0;
 284         do {
 285                 result = *addr;
 286
 287                 /* check timeout */
 288                 if (get_timer(start) > CONFIG_SYS_FLASH_ERASE_TOUT) {
 289                         chip1 = ERR | TMO;
 290                         break;
 291                 }
 292                 if (!chip1 && ((result & 0x80) == (data & 0x80)))
 293                         chip1 = READY;
 294
 295         } while (!chip1);
 296
 297         *addr = CMD_READ_ARRAY;
 298
 299         if (chip1 == ERR || *addr != data)
 300                 rc = ERR_PROG_ERROR;
 301
 302         if (iflag)
 303                 enable_interrupts ();
 304
 305         if (cflag)
 306                 icache_enable ();
 307
 308         return rc;
 309 }
 310
 311
 312 int write_buff (flash_info_t * info, uchar * src, ulong addr, ulong cnt)
 313 {
 314         ulong wp, data;
 315         int rc;
 316
 317         if (addr & 1) {
 318                 printf ("unaligned destination not supported\n");
 319                 return ERR_ALIGN;
 320         }
 321
 322 #if 0
 323         if (cnt & 1) {
 324                 printf ("odd transfer sizes not supported\n");
 325                 return ERR_ALIGN;
 326         }
 327 #endif
 328
 329         wp = addr;
 330
 331         if (addr & 1) {
 332                 data = (*((volatile u8 *) addr) << 8) | *((volatile u8 *)
 333                                                           src);
 334                 if ((rc = write_word (info, wp - 1, data)) != 0) {
 335                         return (rc);
 336                 }
 337                 src += 1;
 338                 wp += 1;
 339                 cnt -= 1;
 340         }
 341
 342         while (cnt >= 2) {
 343                 data = *((volatile u16 *) src);
 344                 if ((rc = write_word (info, wp, data)) != 0) {
 345                         return (rc);
 346                 }
 347                 src += 2;
 348                 wp += 2;
 349                 cnt -= 2;
 350         }
 351
 352         if (cnt == 1) {
 353                 data = (*((volatile u8 *) src) << 8) |
 354                         *((volatile u8 *) (wp + 1));
 355                 if ((rc = write_word (info, wp, data)) != 0) {
 356                         return (rc);
 357                 }
 358                 src += 1;
 359                 wp += 1;
 360                 cnt -= 1;
 361         }
 362
 363         return ERR_OK;
 364 }