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 <flash.h>
  11 #include <irq_func.h>
  12 #include <uuid.h>
  13
  14 #define PHYS_FLASH_1 CONFIG_SYS_FLASH_BASE
  15 #define FLASH_BANK_SIZE 0x200000
  16
  17 flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS];
  18
  19 void flash_print_info(flash_info_t *info)
  20 {
  21         int i;
  22
  23         switch (info->flash_id & FLASH_VENDMASK) {
  24         case (AMD_MANUFACT & FLASH_VENDMASK):
  25                 printf ("AMD: ");
  26                 break;
  27         default:
  28                 printf ("Unknown Vendor ");
  29                 break;
  30         }
  31
  32         switch (info->flash_id & FLASH_TYPEMASK) {
  33         case (AMD_ID_PL160CB & FLASH_TYPEMASK):
  34                 printf ("AM29PL160CB (16Mbit)\n");
  35                 break;
  36         default:
  37                 printf ("Unknown Chip Type\n");
  38                 goto Done;
  39                 break;
  40         }
  41
  42         printf ("  Size: %ld MB in %d Sectors\n",
  43                 info->size >> 20, info->sector_count);
  44
  45         printf ("  Sector Start Addresses:");
  46         for (i = 0; i < info->sector_count; i++) {
  47                 if ((i % 5) == 0) {
  48                         printf ("\n   ");
  49                 }
  50                 printf (" %08lX%s", info->start[i],
  51                         info->protect[i] ? " (RO)" : "     ");
  52         }
  53         printf ("\n");
  54
  55 Done:
  56         return;
  57 }
  58
  59
  60 unsigned long flash_init(void)
  61 {
  62         int i, j;
  63         ulong size = 0;
  64
  65         for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; i++) {
  66                 ulong flashbase = 0;
  67
  68                 flash_info[i].flash_id =
  69                         (AMD_MANUFACT & FLASH_VENDMASK) |
  70                         (AMD_ID_PL160CB & FLASH_TYPEMASK);
  71                 flash_info[i].size = FLASH_BANK_SIZE;
  72                 flash_info[i].sector_count = CONFIG_SYS_MAX_FLASH_SECT;
  73                 memset (flash_info[i].protect, 0, CONFIG_SYS_MAX_FLASH_SECT);
  74                 if (i == 0)
  75                         flashbase = PHYS_FLASH_1;
  76                 else
  77                         panic ("configured to many flash banks!\n");
  78
  79                 for (j = 0; j < flash_info[i].sector_count; j++) {
  80                         if (j == 0) {
  81                                 /* 1st is 16 KiB */
  82                                 flash_info[i].start[j] = flashbase;
  83                         }
  84                         if ((j >= 1) && (j <= 2)) {
  85                                 /* 2nd and 3rd are 8 KiB */
  86                                 flash_info[i].start[j] =
  87                                         flashbase + 0x4000 + 0x2000 * (j - 1);
  88                         }
  89                         if (j == 3) {
  90                                 /* 4th is 224 KiB */
  91                                 flash_info[i].start[j] = flashbase + 0x8000;
  92                         }
  93                         if ((j >= 4) && (j <= 10)) {
  94                                 /* rest is 256 KiB */
  95                                 flash_info[i].start[j] =
  96                                         flashbase + 0x40000 + 0x40000 * (j -
  97                                                                          4);
  98                         }
  99                 }
 100                 size += flash_info[i].size;
 101         }
 102
 103         flash_protect(FLAG_PROTECT_SET,
 104                       CONFIG_SYS_FLASH_BASE,
 105                       CONFIG_SYS_FLASH_BASE + 0x3ffff, &flash_info[0]);
 106
 107         return size;
 108 }
 109
 110
 111 #define CMD_READ_ARRAY          0x00F0
 112 #define CMD_UNLOCK1             0x00AA
 113 #define CMD_UNLOCK2             0x0055
 114 #define CMD_ERASE_SETUP         0x0080
 115 #define CMD_ERASE_CONFIRM       0x0030
 116 #define CMD_PROGRAM             0x00A0
 117 #define CMD_UNLOCK_BYPASS       0x0020
 118
 119 #define MEM_FLASH_ADDR1         (*(volatile u16 *)(CONFIG_SYS_FLASH_BASE + (0x00000555<<1)))
 120 #define MEM_FLASH_ADDR2         (*(volatile u16 *)(CONFIG_SYS_FLASH_BASE + (0x000002AA<<1)))
 121
 122 #define BIT_ERASE_DONE          0x0080
 123 #define BIT_RDY_MASK            0x0080
 124 #define BIT_PROGRAM_ERROR       0x0020
 125 #define BIT_TIMEOUT             0x80000000      /* our flag */
 126
 127 #define READY 1
 128 #define ERR   2
 129 #define TMO   4
 130
 131
 132 int flash_erase(flash_info_t *info, int s_first, int s_last)
 133 {
 134         ulong result;
 135         int iflag, cflag, prot, sect;
 136         int rc = ERR_OK;
 137         int chip1;
 138         ulong start;
 139
 140         /* first look for protection bits */
 141
 142         if (info->flash_id == FLASH_UNKNOWN)
 143                 return ERR_UNKNOWN_FLASH_TYPE;
 144
 145         if ((s_first < 0) || (s_first > s_last)) {
 146                 return ERR_INVAL;
 147         }
 148
 149         if ((info->flash_id & FLASH_VENDMASK) !=
 150             (AMD_MANUFACT & FLASH_VENDMASK)) {
 151                 return ERR_UNKNOWN_FLASH_VENDOR;
 152         }
 153
 154         prot = 0;
 155         for (sect = s_first; sect <= s_last; ++sect) {
 156                 if (info->protect[sect]) {
 157                         prot++;
 158                 }
 159         }
 160         if (prot)
 161                 return ERR_PROTECTED;
 162
 163         /*
 164          * Disable interrupts which might cause a timeout
 165          * here. Remember that our exception vectors are
 166          * at address 0 in the flash, and we don't want a
 167          * (ticker) exception to happen while the flash
 168          * chip is in programming mode.
 169          */
 170
 171         cflag = icache_status();
 172         icache_disable();
 173         iflag = disable_interrupts();
 174
 175         printf ("\n");
 176
 177         /* Start erase on unprotected sectors */
 178         for (sect = s_first; sect <= s_last && !ctrlc (); sect++) {
 179                 printf ("Erasing sector %2d ... ", sect);
 180
 181                 /* arm simple, non interrupt dependent timer */
 182                 start = get_timer(0);
 183
 184                 if (info->protect[sect] == 0) { /* not protected */
 185                         volatile u16 *addr =
 186                                 (volatile u16 *) (info->start[sect]);
 187
 188                         MEM_FLASH_ADDR1 = CMD_UNLOCK1;
 189                         MEM_FLASH_ADDR2 = CMD_UNLOCK2;
 190                         MEM_FLASH_ADDR1 = CMD_ERASE_SETUP;
 191
 192                         MEM_FLASH_ADDR1 = CMD_UNLOCK1;
 193                         MEM_FLASH_ADDR2 = CMD_UNLOCK2;
 194                         *addr = CMD_ERASE_CONFIRM;
 195
 196                         /* wait until flash is ready */
 197                         chip1 = 0;
 198
 199                         do {
 200                                 result = *addr;
 201
 202                                 /* check timeout */
 203                                 if (get_timer(start) > CONFIG_SYS_FLASH_ERASE_TOUT) {
 204                                         MEM_FLASH_ADDR1 = CMD_READ_ARRAY;
 205                                         chip1 = TMO;
 206                                         break;
 207                                 }
 208
 209                                 if (!chip1
 210                                     && (result & 0xFFFF) & BIT_ERASE_DONE)
 211                                         chip1 = READY;
 212
 213                         } while (!chip1);
 214
 215                         MEM_FLASH_ADDR1 = CMD_READ_ARRAY;
 216
 217                         if (chip1 == ERR) {
 218                                 rc = ERR_PROG_ERROR;
 219                                 goto outahere;
 220                         }
 221                         if (chip1 == TMO) {
 222                                 rc = ERR_TIMEOUT;
 223                                 goto outahere;
 224                         }
 225
 226                         printf ("ok.\n");
 227                 } else {        /* it was protected */
 228
 229                         printf ("protected!\n");
 230                 }
 231         }
 232
 233         if (ctrlc ())
 234                 printf ("User Interrupt!\n");
 235
 236       outahere:
 237         /* allow flash to settle - wait 10 ms */
 238         udelay (10000);
 239
 240         if (iflag)
 241                 enable_interrupts();
 242
 243         if (cflag)
 244                 icache_enable();
 245
 246         return rc;
 247 }
 248
 249 static int write_word(flash_info_t *info, ulong dest, ulong data)
 250 {
 251         volatile u16 *addr = (volatile u16 *) dest;
 252         ulong result;
 253         int rc = ERR_OK;
 254         int cflag, iflag;
 255         int chip1;
 256         ulong start;
 257
 258         /*
 259          * Check if Flash is (sufficiently) erased
 260          */
 261         result = *addr;
 262         if ((result & data) != data)
 263                 return ERR_NOT_ERASED;
 264
 265
 266         /*
 267          * Disable interrupts which might cause a timeout
 268          * here. Remember that our exception vectors are
 269          * at address 0 in the flash, and we don't want a
 270          * (ticker) exception to happen while the flash
 271          * chip is in programming mode.
 272          */
 273
 274         cflag = icache_status();
 275         icache_disable();
 276         iflag = disable_interrupts();
 277
 278         MEM_FLASH_ADDR1 = CMD_UNLOCK1;
 279         MEM_FLASH_ADDR2 = CMD_UNLOCK2;
 280         MEM_FLASH_ADDR1 = CMD_PROGRAM;
 281         *addr = data;
 282
 283         /* arm simple, non interrupt dependent timer */
 284         start = get_timer(0);
 285
 286         /* wait until flash is ready */
 287         chip1 = 0;
 288         do {
 289                 result = *addr;
 290
 291                 /* check timeout */
 292                 if (get_timer(start) > CONFIG_SYS_FLASH_ERASE_TOUT) {
 293                         chip1 = ERR | TMO;
 294                         break;
 295                 }
 296                 if (!chip1 && ((result & 0x80) == (data & 0x80)))
 297                         chip1 = READY;
 298
 299         } while (!chip1);
 300
 301         *addr = CMD_READ_ARRAY;
 302
 303         if (chip1 == ERR || *addr != data)
 304                 rc = ERR_PROG_ERROR;
 305
 306         if (iflag)
 307                 enable_interrupts();
 308
 309         if (cflag)
 310                 icache_enable();
 311
 312         return rc;
 313 }
 314
 315
 316 int write_buff(flash_info_t *info, uchar *src, ulong addr, ulong cnt)
 317 {
 318         ulong wp, data;
 319         int rc;
 320
 321         if (addr & 1) {
 322                 printf ("unaligned destination not supported\n");
 323                 return ERR_ALIGN;
 324         }
 325
 326 #if 0
 327         if (cnt & 1) {
 328                 printf ("odd transfer sizes not supported\n");
 329                 return ERR_ALIGN;
 330         }
 331 #endif
 332
 333         wp = addr;
 334
 335         if (addr & 1) {
 336                 data = (*((volatile u8 *) addr) << 8) | *((volatile u8 *)
 337                                                           src);
 338                 if ((rc = write_word (info, wp - 1, data)) != 0) {
 339                         return (rc);
 340                 }
 341                 src += 1;
 342                 wp += 1;
 343                 cnt -= 1;
 344         }
 345
 346         while (cnt >= 2) {
 347                 data = *((volatile u16 *) src);
 348                 if ((rc = write_word (info, wp, data)) != 0) {
 349                         return (rc);
 350                 }
 351                 src += 2;
 352                 wp += 2;
 353                 cnt -= 2;
 354         }
 355
 356         if (cnt == 1) {
 357                 data = (*((volatile u8 *) src) << 8) |
 358                         *((volatile u8 *) (wp + 1));
 359                 if ((rc = write_word (info, wp, data)) != 0) {
 360                         return (rc);
 361                 }
 362                 src += 1;
 363                 wp += 1;
 364                 cnt -= 1;
 365         }
 366
 367         return ERR_OK;
 368 }