board/cobra5272/flash.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * (C) Copyright 2000-2003
   4  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   5  */
   6
   7 #include <common.h>
   8 #include <console.h>
   9 #include <cpu_func.h>
  10
  11 #define PHYS_FLASH_1 CONFIG_SYS_FLASH_BASE
  12 #define FLASH_BANK_SIZE 0x200000
  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 (AMD_ID_PL160CB & FLASH_TYPEMASK):
  31                 printf ("AM29PL160CB (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                         (AMD_ID_PL160CB & 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                         if (j == 0) {
  78                                 /* 1st is 16 KiB */
  79                                 flash_info[i].start[j] = flashbase;
  80                         }
  81                         if ((j >= 1) && (j <= 2)) {
  82                                 /* 2nd and 3rd are 8 KiB */
  83                                 flash_info[i].start[j] =
  84                                         flashbase + 0x4000 + 0x2000 * (j - 1);
  85                         }
  86                         if (j == 3) {
  87                                 /* 4th is 224 KiB */
  88                                 flash_info[i].start[j] = flashbase + 0x8000;
  89                         }
  90                         if ((j >= 4) && (j <= 10)) {
  91                                 /* rest is 256 KiB */
  92                                 flash_info[i].start[j] =
  93                                         flashbase + 0x40000 + 0x40000 * (j -
  94                                                                          4);
  95                         }
  96                 }
  97                 size += flash_info[i].size;
  98         }
  99
 100         flash_protect (FLAG_PROTECT_SET,
 101                        CONFIG_SYS_FLASH_BASE,
 102                        CONFIG_SYS_FLASH_BASE + 0x3ffff, &flash_info[0]);
 103
 104         return size;
 105 }
 106
 107
 108 #define CMD_READ_ARRAY          0x00F0
 109 #define CMD_UNLOCK1             0x00AA
 110 #define CMD_UNLOCK2             0x0055
 111 #define CMD_ERASE_SETUP         0x0080
 112 #define CMD_ERASE_CONFIRM       0x0030
 113 #define CMD_PROGRAM             0x00A0
 114 #define CMD_UNLOCK_BYPASS       0x0020
 115
 116 #define MEM_FLASH_ADDR1         (*(volatile u16 *)(CONFIG_SYS_FLASH_BASE + (0x00000555<<1)))
 117 #define MEM_FLASH_ADDR2         (*(volatile u16 *)(CONFIG_SYS_FLASH_BASE + (0x000002AA<<1)))
 118
 119 #define BIT_ERASE_DONE          0x0080
 120 #define BIT_RDY_MASK            0x0080
 121 #define BIT_PROGRAM_ERROR       0x0020
 122 #define BIT_TIMEOUT             0x80000000      /* our flag */
 123
 124 #define READY 1
 125 #define ERR   2
 126 #define TMO   4
 127
 128
 129 int flash_erase (flash_info_t * info, int s_first, int s_last)
 130 {
 131         ulong result;
 132         int iflag, cflag, prot, sect;
 133         int rc = ERR_OK;
 134         int chip1;
 135         ulong start;
 136
 137         /* first look for protection bits */
 138
 139         if (info->flash_id == FLASH_UNKNOWN)
 140                 return ERR_UNKNOWN_FLASH_TYPE;
 141
 142         if ((s_first < 0) || (s_first > s_last)) {
 143                 return ERR_INVAL;
 144         }
 145
 146         if ((info->flash_id & FLASH_VENDMASK) !=
 147             (AMD_MANUFACT & FLASH_VENDMASK)) {
 148                 return ERR_UNKNOWN_FLASH_VENDOR;
 149         }
 150
 151         prot = 0;
 152         for (sect = s_first; sect <= s_last; ++sect) {
 153                 if (info->protect[sect]) {
 154                         prot++;
 155                 }
 156         }
 157         if (prot)
 158                 return ERR_PROTECTED;
 159
 160         /*
 161          * Disable interrupts which might cause a timeout
 162          * here. Remember that our exception vectors are
 163          * at address 0 in the flash, and we don't want a
 164          * (ticker) exception to happen while the flash
 165          * chip is in programming mode.
 166          */
 167
 168         cflag = icache_status();
 169         icache_disable();
 170         iflag = disable_interrupts();
 171
 172         printf ("\n");
 173
 174         /* Start erase on unprotected sectors */
 175         for (sect = s_first; sect <= s_last && !ctrlc (); sect++) {
 176                 printf ("Erasing sector %2d ... ", sect);
 177
 178                 /* arm simple, non interrupt dependent timer */
 179                 start = get_timer(0);
 180
 181                 if (info->protect[sect] == 0) { /* not protected */
 182                         volatile u16 *addr =
 183                                 (volatile u16 *) (info->start[sect]);
 184
 185                         MEM_FLASH_ADDR1 = CMD_UNLOCK1;
 186                         MEM_FLASH_ADDR2 = CMD_UNLOCK2;
 187                         MEM_FLASH_ADDR1 = CMD_ERASE_SETUP;
 188
 189                         MEM_FLASH_ADDR1 = CMD_UNLOCK1;
 190                         MEM_FLASH_ADDR2 = CMD_UNLOCK2;
 191                         *addr = CMD_ERASE_CONFIRM;
 192
 193                         /* wait until flash is ready */
 194                         chip1 = 0;
 195
 196                         do {
 197                                 result = *addr;
 198
 199                                 /* check timeout */
 200                                 if (get_timer(start) > CONFIG_SYS_FLASH_ERASE_TOUT) {
 201                                         MEM_FLASH_ADDR1 = CMD_READ_ARRAY;
 202                                         chip1 = TMO;
 203                                         break;
 204                                 }
 205
 206                                 if (!chip1
 207                                     && (result & 0xFFFF) & BIT_ERASE_DONE)
 208                                         chip1 = READY;
 209
 210                         } while (!chip1);
 211
 212                         MEM_FLASH_ADDR1 = CMD_READ_ARRAY;
 213
 214                         if (chip1 == ERR) {
 215                                 rc = ERR_PROG_ERROR;
 216                                 goto outahere;
 217                         }
 218                         if (chip1 == TMO) {
 219                                 rc = ERR_TIMEOUT;
 220                                 goto outahere;
 221                         }
 222
 223                         printf ("ok.\n");
 224                 } else {        /* it was protected */
 225
 226                         printf ("protected!\n");
 227                 }
 228         }
 229
 230         if (ctrlc ())
 231                 printf ("User Interrupt!\n");
 232
 233       outahere:
 234         /* allow flash to settle - wait 10 ms */
 235         udelay (10000);
 236
 237         if (iflag)
 238                 enable_interrupts();
 239
 240         if (cflag)
 241                 icache_enable();
 242
 243         return rc;
 244 }
 245
 246 static int write_word (flash_info_t * info, ulong dest, ulong data)
 247 {
 248         volatile u16 *addr = (volatile u16 *) dest;
 249         ulong result;
 250         int rc = ERR_OK;
 251         int cflag, iflag;
 252         int chip1;
 253         ulong start;
 254
 255         /*
 256          * Check if Flash is (sufficiently) erased
 257          */
 258         result = *addr;
 259         if ((result & data) != data)
 260                 return ERR_NOT_ERASED;
 261
 262
 263         /*
 264          * Disable interrupts which might cause a timeout
 265          * here. Remember that our exception vectors are
 266          * at address 0 in the flash, and we don't want a
 267          * (ticker) exception to happen while the flash
 268          * chip is in programming mode.
 269          */
 270
 271         cflag = icache_status();
 272         icache_disable();
 273         iflag = disable_interrupts();
 274
 275         MEM_FLASH_ADDR1 = CMD_UNLOCK1;
 276         MEM_FLASH_ADDR2 = CMD_UNLOCK2;
 277         MEM_FLASH_ADDR1 = CMD_PROGRAM;
 278         *addr = data;
 279
 280         /* arm simple, non interrupt dependent timer */
 281         start = get_timer(0);
 282
 283         /* wait until flash is ready */
 284         chip1 = 0;
 285         do {
 286                 result = *addr;
 287
 288                 /* check timeout */
 289                 if (get_timer(start) > CONFIG_SYS_FLASH_ERASE_TOUT) {
 290                         chip1 = ERR | TMO;
 291                         break;
 292                 }
 293                 if (!chip1 && ((result & 0x80) == (data & 0x80)))
 294                         chip1 = READY;
 295
 296         } while (!chip1);
 297
 298         *addr = CMD_READ_ARRAY;
 299
 300         if (chip1 == ERR || *addr != data)
 301                 rc = ERR_PROG_ERROR;
 302
 303         if (iflag)
 304                 enable_interrupts();
 305
 306         if (cflag)
 307                 icache_enable();
 308
 309         return rc;
 310 }
 311
 312
 313 int write_buff (flash_info_t * info, uchar * src, ulong addr, ulong cnt)
 314 {
 315         ulong wp, data;
 316         int rc;
 317
 318         if (addr & 1) {
 319                 printf ("unaligned destination not supported\n");
 320                 return ERR_ALIGN;
 321         }
 322
 323 #if 0
 324         if (cnt & 1) {
 325                 printf ("odd transfer sizes not supported\n");
 326                 return ERR_ALIGN;
 327         }
 328 #endif
 329
 330         wp = addr;
 331
 332         if (addr & 1) {
 333                 data = (*((volatile u8 *) addr) << 8) | *((volatile u8 *)
 334                                                           src);
 335                 if ((rc = write_word (info, wp - 1, data)) != 0) {
 336                         return (rc);
 337                 }
 338                 src += 1;
 339                 wp += 1;
 340                 cnt -= 1;
 341         }
 342
 343         while (cnt >= 2) {
 344                 data = *((volatile u16 *) src);
 345                 if ((rc = write_word (info, wp, data)) != 0) {
 346                         return (rc);
 347                 }
 348                 src += 2;
 349                 wp += 2;
 350                 cnt -= 2;
 351         }
 352
 353         if (cnt == 1) {
 354                 data = (*((volatile u8 *) src) << 8) |
 355                         *((volatile u8 *) (wp + 1));
 356                 if ((rc = write_word (info, wp, data)) != 0) {
 357                         return (rc);
 358                 }
 359                 src += 1;
 360                 wp += 1;
 361                 cnt -= 1;
 362         }
 363
 364         return ERR_OK;
 365 }