main.c

使用物理地址方式绕开mtd驱动进行nand flash的低级格式化和维护可以修复nand 坏块(不是物理损坏而是由于文件系统造成的坏块)

/********************************************************************/
/*FILENAME: lfn.c                                                   */                              /*FUNCTION: low level format nand flash  in linux                   */
/*DATA    : 2007-1-18 10:22                                         */
/*AUR     : ZHANG YI FNEG                                           */
/*ORI     : ZZVCOM                                                  */
/********************************************************************/
/*                          张驿风
                         2007-01-18
                     郑州市威科姆电子科技
*/
/*
    Ver0.01  2007-01-20 can format a nand ic.
    Ver0.02  2007-01-23 add r,w command.
*/
#include<stdio.h>
#include<stdlib.h>
#include<string.h>
#include "nand.h"
char *version = (char*)"Ver0.02";
u8   Buf[528];
extern struct nand_info nand;
u32 blockcount;

void DisHexData(u8 *buf,u32 count);


int main(int argc, char **argv){
     u32 i,block;
     printf("lfn %s\r\n",version);	
     printf("郑州市威科姆电子科技系统平台开发部.\r\n");    
     printf( __DATE__ "\r\n");
     printf( __TIME__ "\r\n");
     nand_init();

     switch(read_nand_id()){
          case 0x7520 :{
              printf(NAND256W3A "\r\n");
              blockcount = 2048;
              break;
          }
          default:{
              printf("no find nand device,please check nand ic whether is ok.\r\n");
              goto end;
          }
     }

     if(argc<2) {                                               //不指定参数直接整片格式化。
          for(i=0;i<blockcount;i++){
              nand.block  = i;
              nand.page   = 0;
              nand.offset = 0;
              nand_block_erase(0);
          }
     	  goto end;
     }
     if((strcmp(argv[1],"?")==0)||(strcmp(argv[1],"h")==0)){
          printf("format r  n  -- read the first page of block n.\r\n");
          printf("format n     -- format the block n.\r\n");
          printf("format w  n  -- clear the first page of block n\r\n"); 
          printf("format       -- format the nand ic.\r\n");
          printf("[e-mail]\r\n");
          goto end;
     }
   
     if((strcmp(argv[1],"s")==0)||(strcmp(argv[1],"S")==0)){     //扫描整个芯片.
          printf("Scaning nand ic,'*' is a bad block '.' is ok block.");
          for(i=0;i<blockcount;i++){
              nand.block  = i;
              nand.page   = 0;
              nand.offset = 0;
              
              if((i % 32)==0){
                   printf("  ");
              }
              if((i % 64)==0) {
                   if(i>0){
                       printf(" %02dMB",i/64);
                   }
                   printf("\r\n");
              }         
              
              nand_read_page(0,Buf);
              if(Buf[517] !=0xFF){
                   printf("*");
              }else{
                   printf(".");
              } 
          }
          goto end; 
     }
     if((strcmp(argv[1],"r")==0)||(strcmp(argv[1],"R")==0)){     //.
          if(argc<3) {
               printf("Please input block number for read.\r\n");
               goto end;
          }
          nand.block  = atoi(argv[2]);
          nand.page   = 0;
          nand.offset = 0;
          nand_read_page(0,Buf);
          DisHexData(Buf,528);
          goto end;
     }
     if((strcmp(argv[1],"w")==0)||(strcmp(argv[1],"W")==0)){     //.
          if(argc<3) {
               printf("Please input block number for write.\r\n");
               goto end;
          }
          for(i=0;i<528;i++){
               Buf[i] = 0x00;
          }
          nand.block  = atoi(argv[2]);
          nand.page   = 0;
          nand.offset = 0;
          nand_write_page(0,Buf);
          nand_read_page(0,Buf);
          DisHexData(Buf,528);
          goto end;
     }

     block = atoi(argv[1]);                                      //格式化指定的块 
     nand.block  = block;
     nand.page   = 0;
     nand.offset = 0;
     nand_block_erase(0);

     end:
     printf("\r\n");
     nand_uninit();
     return 0;
}
/**********************************************************************/
/* NAME     : DisHexData                                              */
/* FUNCTION : format out the hex data  as debug out mode              */
/* PARAMETER: *buf :will be display data buf pointer                  */
/*            count:will be display data length                       */
/**********************************************************************/
void DisHexData(u8 * buf ,u32 Count){
    u32 i;
    printf("       ");
    for(i=0;i<16;i++){
        if(i==8) printf(" ");
        printf("%02X ",i);
    }
    printf("\r\n       ");
    for(i=0;i<16;i++){
        printf("...");
    }
    for(i=0;i<Count;i++){
        if(((i%512)==0)&(i!=0)) printf("\r\n");
        if((i%8)==0) printf(" ");
        if((i%16)==0){
             printf("\r\n");
             printf("%04X . ",i);
        }
        printf("%02X ",buf[i]);
 
    }
    //-----------------------------------
    printf("\r\n");
}