dataflash.c

开发三星s3c44b0引导程序

#include <zooboot.h>
#ifdef CFG_HAS_DATAFLASH

dataflash_info_t dataflash_info[CFG_MAX_DATAFLASH_BANKS];

extern int get_dataflash_status( char);

dataflash_info_t * dataflash_init( void) {
   int i, j;
   int dfcode;
   spi_init();
   for (i = 0; i < CFG_MAX_DATAFLASH_BANKS; i++) {
      if (i != 0) {
         panic("More than one DataFlash not supported.\n");
      }
      dfcode = dataflash_probe();
      switch( dfcode) {
         case AT45DB161:
         case AT45DB321:
         case AT45DB642:
            break;
         default: 
            printf("Unsupported DataFlash type 0x%x. Defaulting to AT45DB161.\n", dfcode);
            dfcode = AT45DB161;
            break;
      }
      switch( dfcode) {
         case AT45DB161:
            dataflash_info[i].page_count = 4096;
            dataflash_info[i].page_size = 528;
            break;
         case AT45DB321:
            dataflash_info[i].page_count = 8192;
            dataflash_info[i].page_size = 528;
            break;
         case AT45DB642:
            dataflash_info[i].page_count = 8192;
            dataflash_info[i].page_size = 1056;
            break;
        default:
            break;
      }
      dataflash_info[i].size = dataflash_info[i].page_count * 
                               dataflash_info[i].page_size;
      for (j = 0; j < dataflash_info[i].page_count; j++)
         dataflash_info[i].protect[j] = FLAG_PROTECT_SET;
      dataflash_info[i].id = dfcode;
      dataflash_info[i].base = CFG_DATAFLASH_LOGICAL_BASE + i * 0x01000000;
   }
   return( dataflash_info);
}

void dataflash_print_info( dataflash_info_t * info) {
   printf("DataFlash:");
   switch( info->id) {
      case AT45DB161:
         printf(" Atmel: AT45DB161 ");
         break;
      case AT45DB321:
         printf(" Atmel: AT45DB321 ");
         break;
      case AT45DB642:
         printf(" Atmel: AT45DB642 ");
         break;
      default:
         printf(" unsupported.\n");
         return;
   }
   printf("(%d bytes)\n", info->size);
   printf("  %d pages of %d bytes\n", info->page_count, info->page_size);
   printf("  Logical base address 0x%x\n", info->base);
}

dataflash_info_t * addr2dataflash( ulong addr) {
   int i;

   for (i = 0; i < CFG_MAX_DATAFLASH_BANKS; i++) {
      if ((addr >= dataflash_info[i].base) &&
          (addr <  (dataflash_info[i].base + dataflash_info[i].size)))
         return( &dataflash_info[i]);
   }
   return( NULL);
}

void dataflash_perror(int err)
{
    switch (err)
    {
    case ERR_OK:
        break;
    case ERR_TIMOUT:
        printf ("Timeout writing to DataFlash\n");
        break;
    case ERR_PROTECTED:
        printf ("Can't write to protected DataFlash sectors\n");
        break;
    case ERR_INVAL:
        printf ("Outside available DataFlash\n");
        break;
    case ERR_UNKNOWN_FLASH_TYPE:
        printf ("Unknown Type of DataFlash\n");
        break;
    case ERR_PROG_ERROR:
        printf ("General DataFlash Programming Error\n");
        break;
    default:
        printf ("%s[%d] FIXME: rc=%d\n",__FILE__,__LINE__,err);
        break;
    }
}

#endif