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 #include <irq_func.h>
  11
  12 #define PHYS_FLASH_1 CONFIG_SYS_FLASH_BASE
  13 #define FLASH_BANK_SIZE 0x200000
  14
  15 flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS];
  16
  17 void flash_print_info (flash_info_t * info)
  18 {
  19         int i;
  20
  21         switch (info->flash_id & FLASH_VENDMASK) {
  22         case (AMD_MANUFACT & FLASH_VENDMASK):
  23                 printf ("AMD: ");
  24                 break;
  25         default:
  26                 printf ("Unknown Vendor ");
  27                 break;
  28         }
  29
  30         switch (info->flash_id & FLASH_TYPEMASK) {
  31         case (AMD_ID_PL160CB & FLASH_TYPEMASK):
  32                 printf ("AM29PL160CB (16Mbit)\n");
  33                 break;
  34         default:
  35                 printf ("Unknown Chip Type\n");
  36                 goto Done;
  37                 break;
  38         }
  39
  40         printf ("  Size: %ld MB in %d Sectors\n",
  41                 info->size >> 20, info->sector_count);
  42
  43         printf ("  Sector Start Addresses:");
  44         for (i = 0; i < info->sector_count; i++) {
  45                 if ((i % 5) == 0) {
  46                         printf ("\n   ");
  47                 }
  48                 printf (" %08lX%s", info->start[i],
  49                         info->protect[i] ? " (RO)" : "     ");
  50         }
  51         printf ("\n");
  52
  53 Done:
  54         return;
  55 }
  56
  57
  58 unsigned long flash_init (void)
  59 {
  60         int i, j;
  61         ulong size = 0;
  62
  63         for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; i++) {
  64                 ulong flashbase = 0;
  65
  66                 flash_info[i].flash_id =
  67                         (AMD_MANUFACT & FLASH_VENDMASK) |
  68                         (AMD_ID_PL160CB & FLASH_TYPEMASK);
  69                 flash_info[i].size = FLASH_BANK_SIZE;
  70                 flash_info[i].sector_count = CONFIG_SYS_MAX_FLASH_SECT;
  71                 memset (flash_info[i].protect, 0, CONFIG_SYS_MAX_FLASH_SECT);
  72                 if (i == 0)
  73                         flashbase = PHYS_FLASH_1;
  74                 else
  75                         panic ("configured to many flash banks!\n");
  76
  77                 for (j = 0; j < flash_info[i].sector_count; j++) {
  78                         if (j == 0) {
  79                                 /* 1st is 16 KiB */
  80                                 flash_info[i].start[j] = flashbase;
  81                         }
  82                         if ((j >= 1) && (j <= 2)) {
  83                                 /* 2nd and 3rd are 8 KiB */
  84                                 flash_info[i].start[j] =
  85                                         flashbase + 0x4000 + 0x2000 * (j - 1);
  86                         }
  87                         if (j == 3) {
  88                                 /* 4th is 224 KiB */
  89                                 flash_info[i].start[j] = flashbase + 0x8000;
  90                         }
  91                         if ((j >= 4) && (j <= 10)) {
  92                                 /* rest is 256 KiB */
  93                                 flash_info[i].start[j] =
  94                                         flashbase + 0x40000 + 0x40000 * (j -
  95                                                                          4);
  96                         }
  97                 }
  98                 size += flash_info[i].size;
  99         }
 100
 101         flash_protect (FLAG_PROTECT_SET,
 102                        CONFIG_SYS_FLASH_BASE,
 103                        CONFIG_SYS_FLASH_BASE + 0x3ffff, &flash_info[0]);
 104
 105         return size;
 106 }
 107
 108
 109 #define CMD_READ_ARRAY          0x00F0
 110 #define CMD_UNLOCK1             0x00AA
 111 #define CMD_UNLOCK2             0x0055
 112 #define CMD_ERASE_SETUP         0x0080
 113 #define CMD_ERASE_CONFIRM       0x0030
 114 #define CMD_PROGRAM             0x00A0
 115 #define CMD_UNLOCK_BYPASS       0x0020
 116
 117 #define MEM_FLASH_ADDR1         (*(volatile u16 *)(CONFIG_SYS_FLASH_BASE + (0x00000555<<1)))
 118 #define MEM_FLASH_ADDR2         (*(volatile u16 *)(CONFIG_SYS_FLASH_BASE + (0x000002AA<<1)))
 119
 120 #define BIT_ERASE_DONE          0x0080
 121 #define BIT_RDY_MASK            0x0080
 122 #define BIT_PROGRAM_ERROR       0x0020
 123 #define BIT_TIMEOUT             0x80000000      /* our flag */
 124
 125 #define READY 1
 126 #define ERR   2
 127 #define TMO   4
 128
 129
 130 int flash_erase (flash_info_t * info, int s_first, int s_last)
 131 {
 132         ulong result;
 133         int iflag, cflag, prot, sect;
 134         int rc = ERR_OK;
 135         int chip1;
 136         ulong start;
 137
 138         /* first look for protection bits */
 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             (AMD_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
 169         cflag = icache_status();
 170         icache_disable();
 171         iflag = disable_interrupts();
 172
 173         printf ("\n");
 174
 175         /* Start erase on unprotected sectors */
 176         for (sect = s_first; sect <= s_last && !ctrlc (); sect++) {
 177                 printf ("Erasing sector %2d ... ", sect);
 178
 179                 /* arm simple, non interrupt dependent timer */
 180                 start = get_timer(0);
 181
 182                 if (info->protect[sect] == 0) { /* not protected */
 183                         volatile u16 *addr =
 184                                 (volatile u16 *) (info->start[sect]);
 185
 186                         MEM_FLASH_ADDR1 = CMD_UNLOCK1;
 187                         MEM_FLASH_ADDR2 = CMD_UNLOCK2;
 188                         MEM_FLASH_ADDR1 = CMD_ERASE_SETUP;
 189
 190                         MEM_FLASH_ADDR1 = CMD_UNLOCK1;
 191                         MEM_FLASH_ADDR2 = CMD_UNLOCK2;
 192                         *addr = CMD_ERASE_CONFIRM;
 193
 194                         /* wait until flash is ready */
 195                         chip1 = 0;
 196
 197                         do {
 198                                 result = *addr;
 199
 200                                 /* check timeout */
 201                                 if (get_timer(start) > CONFIG_SYS_FLASH_ERASE_TOUT) {
 202                                         MEM_FLASH_ADDR1 = CMD_READ_ARRAY;
 203                                         chip1 = TMO;
 204                                         break;
 205                                 }
 206
 207                                 if (!chip1
 208                                     && (result & 0xFFFF) & BIT_ERASE_DONE)
 209                                         chip1 = READY;
 210
 211                         } while (!chip1);
 212
 213                         MEM_FLASH_ADDR1 = CMD_READ_ARRAY;
 214
 215                         if (chip1 == ERR) {
 216                                 rc = ERR_PROG_ERROR;
 217                                 goto outahere;
 218                         }
 219                         if (chip1 == TMO) {
 220                                 rc = ERR_TIMEOUT;
 221                                 goto outahere;
 222                         }
 223
 224                         printf ("ok.\n");
 225                 } else {        /* it was protected */
 226
 227                         printf ("protected!\n");
 228                 }
 229         }
 230
 231         if (ctrlc ())
 232                 printf ("User Interrupt!\n");
 233
 234       outahere:
 235         /* allow flash to settle - wait 10 ms */
 236         udelay (10000);
 237
 238         if (iflag)
 239                 enable_interrupts();
 240
 241         if (cflag)
 242                 icache_enable();
 243
 244         return rc;
 245 }
 246
 247 static int write_word (flash_info_t * info, ulong dest, ulong data)
 248 {
 249         volatile u16 *addr = (volatile u16 *) dest;
 250         ulong result;
 251         int rc = ERR_OK;
 252         int cflag, iflag;
 253         int chip1;
 254         ulong start;
 255
 256         /*
 257          * Check if Flash is (sufficiently) erased
 258          */
 259         result = *addr;
 260         if ((result & data) != data)
 261                 return ERR_NOT_ERASED;
 262
 263
 264         /*
 265          * Disable interrupts which might cause a timeout
 266          * here. Remember that our exception vectors are
 267          * at address 0 in the flash, and we don't want a
 268          * (ticker) exception to happen while the flash
 269          * chip is in programming mode.
 270          */
 271
 272         cflag = icache_status();
 273         icache_disable();
 274         iflag = disable_interrupts();
 275
 276         MEM_FLASH_ADDR1 = CMD_UNLOCK1;
 277         MEM_FLASH_ADDR2 = CMD_UNLOCK2;
 278         MEM_FLASH_ADDR1 = CMD_PROGRAM;
 279         *addr = data;
 280
 281         /* arm simple, non interrupt dependent timer */
 282         start = get_timer(0);
 283
 284         /* wait until flash is ready */
 285         chip1 = 0;
 286         do {
 287                 result = *addr;
 288
 289                 /* check timeout */
 290                 if (get_timer(start) > CONFIG_SYS_FLASH_ERASE_TOUT) {
 291                         chip1 = ERR | TMO;
 292                         break;
 293                 }
 294                 if (!chip1 && ((result & 0x80) == (data & 0x80)))
 295                         chip1 = READY;
 296
 297         } while (!chip1);
 298
 299         *addr = CMD_READ_ARRAY;
 300
 301         if (chip1 == ERR || *addr != data)
 302                 rc = ERR_PROG_ERROR;
 303
 304         if (iflag)
 305                 enable_interrupts();
 306
 307         if (cflag)
 308                 icache_enable();
 309
 310         return rc;
 311 }
 312
 313
 314 int write_buff (flash_info_t * info, uchar * src, ulong addr, ulong cnt)
 315 {
 316         ulong wp, data;
 317         int rc;
 318
 319         if (addr & 1) {
 320                 printf ("unaligned destination not supported\n");
 321                 return ERR_ALIGN;
 322         }
 323
 324 #if 0
 325         if (cnt & 1) {
 326                 printf ("odd transfer sizes not supported\n");
 327                 return ERR_ALIGN;
 328         }
 329 #endif
 330
 331         wp = addr;
 332
 333         if (addr & 1) {
 334                 data = (*((volatile u8 *) addr) << 8) | *((volatile u8 *)
 335                                                           src);
 336                 if ((rc = write_word (info, wp - 1, data)) != 0) {
 337                         return (rc);
 338                 }
 339                 src += 1;
 340                 wp += 1;
 341                 cnt -= 1;
 342         }
 343
 344         while (cnt >= 2) {
 345                 data = *((volatile u16 *) src);
 346                 if ((rc = write_word (info, wp, data)) != 0) {
 347                         return (rc);
 348                 }
 349                 src += 2;
 350                 wp += 2;
 351                 cnt -= 2;
 352         }
 353
 354         if (cnt == 1) {
 355                 data = (*((volatile u8 *) src) << 8) |
 356                         *((volatile u8 *) (wp + 1));
 357                 if ((rc = write_word (info, wp, data)) != 0) {
 358                         return (rc);
 359                 }
 360                 src += 1;
 361                 wp += 1;
 362                 cnt -= 1;
 363         }
 364
 365         return ERR_OK;
 366 }