diff options
Diffstat (limited to 'fs/yaffs2/direct/yaffs_fileem.c')
| -rw-r--r-- | fs/yaffs2/direct/yaffs_fileem.c | 219 |
1 files changed, 0 insertions, 219 deletions
diff --git a/fs/yaffs2/direct/yaffs_fileem.c b/fs/yaffs2/direct/yaffs_fileem.c deleted file mode 100644 index 5779d7e..0000000 --- a/fs/yaffs2/direct/yaffs_fileem.c +++ /dev/null @@ -1,219 +0,0 @@ -/* - * YAFFS: Yet Another Flash File System. A NAND-flash specific file system. - * - * Copyright (C) 2002-2007 Aleph One Ltd. - * for Toby Churchill Ltd and Brightstar Engineering - * - * Created by Charles Manning <charles@aleph1.co.uk> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - */ - -/* - * This provides a YAFFS nand emulation on a file. - * This is only intended as test code to test persistence etc. - */ - -/* XXX U-BOOT XXX */ -#include <common.h> - -const char *yaffs_flashif_c_version = "$Id: yaffs_fileem.c,v 1.3 2007/02/14 01:09:06 wookey Exp $"; - - -#include "yportenv.h" - -#include "yaffs_flashif.h" -#include "yaffs_guts.h" - -#include "devextras.h" - -#include <sys/types.h> -#include <sys/stat.h> -#include <fcntl.h> -#include <unistd.h> - - - -#define SIZE_IN_MB 16 - -#define BLOCK_SIZE (32 * 528) -#define BLOCKS_PER_MEG ((1024*1024)/(32 * 512)) - - - -typedef struct -{ - __u8 data[528]; // Data + spare -} yflash_Page; - -typedef struct -{ - yflash_Page page[32]; // The pages in the block - -} yflash_Block; - - - -typedef struct -{ - int handle; - int nBlocks; -} yflash_Device; - -static yflash_Device filedisk; - -static int CheckInit(yaffs_Device *dev) -{ - static int initialised = 0; - - int i; - - - int fSize; - int written; - - yflash_Page p; - - if(initialised) - { - return YAFFS_OK; - } - - initialised = 1; - - - filedisk.nBlocks = (SIZE_IN_MB * 1024 * 1024)/(16 * 1024); - - filedisk.handle = open("yaffsemfile", O_RDWR | O_CREAT, S_IREAD | S_IWRITE); - - if(filedisk.handle < 0) - { - perror("Failed to open yaffs emulation file"); - return YAFFS_FAIL; - } - - - fSize = lseek(filedisk.handle,0,SEEK_END); - - if(fSize < SIZE_IN_MB * 1024 * 1024) - { - printf("Creating yaffs emulation file\n"); - - lseek(filedisk.handle,0,SEEK_SET); - - memset(&p,0xff,sizeof(yflash_Page)); - - for(i = 0; i < SIZE_IN_MB * 1024 * 1024; i+= 512) - { - written = write(filedisk.handle,&p,sizeof(yflash_Page)); - - if(written != sizeof(yflash_Page)) - { - printf("Write failed\n"); - return YAFFS_FAIL; - } - } - } - - return 1; -} - -int yflash_WriteChunkToNAND(yaffs_Device *dev,int chunkInNAND,const __u8 *data, const yaffs_Spare *spare) -{ - int written; - - CheckInit(dev); - - - - if(data) - { - lseek(filedisk.handle,chunkInNAND * 528,SEEK_SET); - written = write(filedisk.handle,data,512); - - if(written != 512) return YAFFS_FAIL; - } - - if(spare) - { - lseek(filedisk.handle,chunkInNAND * 528 + 512,SEEK_SET); - written = write(filedisk.handle,spare,16); - - if(written != 16) return YAFFS_FAIL; - } - - - return YAFFS_OK; - -} - - -int yflash_ReadChunkFromNAND(yaffs_Device *dev,int chunkInNAND, __u8 *data, yaffs_Spare *spare) -{ - int nread; - - CheckInit(dev); - - - - if(data) - { - lseek(filedisk.handle,chunkInNAND * 528,SEEK_SET); - nread = read(filedisk.handle,data,512); - - if(nread != 512) return YAFFS_FAIL; - } - - if(spare) - { - lseek(filedisk.handle,chunkInNAND * 528 + 512,SEEK_SET); - nread= read(filedisk.handle,spare,16); - - if(nread != 16) return YAFFS_FAIL; - } - - - return YAFFS_OK; - -} - - -int yflash_EraseBlockInNAND(yaffs_Device *dev, int blockNumber) -{ - - int i; - - CheckInit(dev); - - if(blockNumber < 0 || blockNumber >= filedisk.nBlocks) - { - T(YAFFS_TRACE_ALWAYS,("Attempt to erase non-existant block %d\n",blockNumber)); - return YAFFS_FAIL; - } - else - { - - yflash_Page pg; - - memset(&pg,0xff,sizeof(yflash_Page)); - - lseek(filedisk.handle, blockNumber * 32 * 528, SEEK_SET); - - for(i = 0; i < 32; i++) - { - write(filedisk.handle,&pg,528); - } - return YAFFS_OK; - } - -} - -int yflash_InitialiseNAND(yaffs_Device *dev) -{ - dev->useNANDECC = 1; // force on useNANDECC which gets faked. - // This saves us doing ECC checks. - - return YAFFS_OK; -} |