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https://github.com/brain-hackers/u-boot-brain
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![Remy Bohmer](/assets/img/avatar_default.png)
Recently the YAFFS filesystem support has been added to U-boot. However, just enabling CONFIG_YAFFS2 is not enough to get it working. ymount will generate an exception (when dereferencing mtd->readoob()), because the genericDevice is a null pointer. Further, a lot of logging is produced while using YAFFS fs, so logging should also be disabled. Both issues are solved by this patch. With this patch and CONFIG_YAFFS2 enabled, I get a readable filesystem in U-boot, as well as in Linux. Tested on a Atmel AT91SAM9261EK board. Signed-off-by: Remy Bohmer <linux@bohmer.net> Acked-by: William Juul <william.juul@tandberg.com> Signed-off-by: Scott Wood <scottwood@freescale.com>
421 lines
8.5 KiB
C
421 lines
8.5 KiB
C
/*
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* YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
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*
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* Copyright (C) 2002-2007 Aleph One Ltd.
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* for Toby Churchill Ltd and Brightstar Engineering
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*
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* Created by Charles Manning <charles@aleph1.co.uk>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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/*
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* yaffscfg.c The configuration for the "direct" use of yaffs.
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*
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* This file is intended to be modified to your requirements.
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* There is no need to redistribute this file.
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*/
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/* XXX U-BOOT XXX */
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#include <common.h>
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#include <config.h>
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#include "nand.h"
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#include "yaffscfg.h"
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#include "yaffsfs.h"
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#include "yaffs_packedtags2.h"
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#include "yaffs_mtdif.h"
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#include "yaffs_mtdif2.h"
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#if 0
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#include <errno.h>
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#else
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#include "malloc.h"
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#endif
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unsigned yaffs_traceMask = 0x0; /* Disable logging */
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static int yaffs_errno = 0;
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void yaffsfs_SetError(int err)
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{
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//Do whatever to set error
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yaffs_errno = err;
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}
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int yaffsfs_GetError(void)
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{
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return yaffs_errno;
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}
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void yaffsfs_Lock(void)
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{
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}
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void yaffsfs_Unlock(void)
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{
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}
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__u32 yaffsfs_CurrentTime(void)
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{
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return 0;
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}
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void *yaffs_malloc(size_t size)
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{
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return malloc(size);
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}
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void yaffs_free(void *ptr)
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{
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free(ptr);
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}
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void yaffsfs_LocalInitialisation(void)
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{
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// Define locking semaphore.
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}
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// Configuration for:
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// /ram 2MB ramdisk
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// /boot 2MB boot disk (flash)
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// /flash 14MB flash disk (flash)
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// NB Though /boot and /flash occupy the same physical device they
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// are still disticnt "yaffs_Devices. You may think of these as "partitions"
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// using non-overlapping areas in the same device.
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//
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#include "yaffs_ramdisk.h"
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#include "yaffs_flashif.h"
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static int isMounted = 0;
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#define MOUNT_POINT "/flash"
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extern nand_info_t nand_info[];
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/* XXX U-BOOT XXX */
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#if 0
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static yaffs_Device ramDev;
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static yaffs_Device bootDev;
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static yaffs_Device flashDev;
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#endif
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static yaffsfs_DeviceConfiguration yaffsfs_config[] = {
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/* XXX U-BOOT XXX */
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#if 0
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{ "/ram", &ramDev},
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{ "/boot", &bootDev},
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{ "/flash", &flashDev},
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#else
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{ MOUNT_POINT, 0},
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#endif
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{(void *)0,(void *)0}
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};
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int yaffs_StartUp(void)
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{
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struct mtd_info *mtd = &nand_info[0];
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int yaffsVersion = 2;
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int nBlocks;
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yaffs_Device *flashDev = calloc(1, sizeof(yaffs_Device));
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yaffsfs_config[0].dev = flashDev;
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/* store the mtd device for later use */
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flashDev->genericDevice = mtd;
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// Stuff to configure YAFFS
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// Stuff to initialise anything special (eg lock semaphore).
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yaffsfs_LocalInitialisation();
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// Set up devices
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/* XXX U-BOOT XXX */
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#if 0
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// /ram
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ramDev.nBytesPerChunk = 512;
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ramDev.nChunksPerBlock = 32;
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ramDev.nReservedBlocks = 2; // Set this smaller for RAM
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ramDev.startBlock = 1; // Can't use block 0
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ramDev.endBlock = 127; // Last block in 2MB.
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ramDev.useNANDECC = 1;
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ramDev.nShortOpCaches = 0; // Disable caching on this device.
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ramDev.genericDevice = (void *) 0; // Used to identify the device in fstat.
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ramDev.writeChunkWithTagsToNAND = yramdisk_WriteChunkWithTagsToNAND;
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ramDev.readChunkWithTagsFromNAND = yramdisk_ReadChunkWithTagsFromNAND;
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ramDev.eraseBlockInNAND = yramdisk_EraseBlockInNAND;
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ramDev.initialiseNAND = yramdisk_InitialiseNAND;
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// /boot
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bootDev.nBytesPerChunk = 612;
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bootDev.nChunksPerBlock = 32;
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bootDev.nReservedBlocks = 5;
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bootDev.startBlock = 1; // Can't use block 0
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bootDev.endBlock = 127; // Last block in 2MB.
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bootDev.useNANDECC = 0; // use YAFFS's ECC
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bootDev.nShortOpCaches = 10; // Use caches
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bootDev.genericDevice = (void *) 1; // Used to identify the device in fstat.
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bootDev.writeChunkToNAND = yflash_WriteChunkToNAND;
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bootDev.readChunkFromNAND = yflash_ReadChunkFromNAND;
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bootDev.eraseBlockInNAND = yflash_EraseBlockInNAND;
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bootDev.initialiseNAND = yflash_InitialiseNAND;
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#endif
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// /flash
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flashDev->nReservedBlocks = 5;
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// flashDev->nShortOpCaches = (options.no_cache) ? 0 : 10;
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flashDev->nShortOpCaches = 10; // Use caches
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flashDev->useNANDECC = 0; // do not use YAFFS's ECC
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if (yaffsVersion == 2)
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{
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flashDev->writeChunkWithTagsToNAND = nandmtd2_WriteChunkWithTagsToNAND;
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flashDev->readChunkWithTagsFromNAND = nandmtd2_ReadChunkWithTagsFromNAND;
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flashDev->markNANDBlockBad = nandmtd2_MarkNANDBlockBad;
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flashDev->queryNANDBlock = nandmtd2_QueryNANDBlock;
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flashDev->spareBuffer = YMALLOC(mtd->oobsize);
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flashDev->isYaffs2 = 1;
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#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
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flashDev->nDataBytesPerChunk = mtd->writesize;
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flashDev->nChunksPerBlock = mtd->erasesize / mtd->writesize;
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#else
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flashDev->nDataBytesPerChunk = mtd->oobblock;
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flashDev->nChunksPerBlock = mtd->erasesize / mtd->oobblock;
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#endif
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nBlocks = mtd->size / mtd->erasesize;
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flashDev->nCheckpointReservedBlocks = 10;
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flashDev->startBlock = 0;
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flashDev->endBlock = nBlocks - 1;
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}
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else
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{
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flashDev->writeChunkToNAND = nandmtd_WriteChunkToNAND;
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flashDev->readChunkFromNAND = nandmtd_ReadChunkFromNAND;
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flashDev->isYaffs2 = 0;
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nBlocks = mtd->size / (YAFFS_CHUNKS_PER_BLOCK * YAFFS_BYTES_PER_CHUNK);
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flashDev->startBlock = 320;
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flashDev->endBlock = nBlocks - 1;
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flashDev->nChunksPerBlock = YAFFS_CHUNKS_PER_BLOCK;
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flashDev->nDataBytesPerChunk = YAFFS_BYTES_PER_CHUNK;
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}
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/* ... and common functions */
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flashDev->eraseBlockInNAND = nandmtd_EraseBlockInNAND;
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flashDev->initialiseNAND = nandmtd_InitialiseNAND;
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yaffs_initialise(yaffsfs_config);
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return 0;
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}
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void make_a_file(char *yaffsName,char bval,int sizeOfFile)
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{
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int outh;
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int i;
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unsigned char buffer[100];
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outh = yaffs_open(yaffsName, O_CREAT | O_RDWR | O_TRUNC, S_IREAD | S_IWRITE);
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if (outh < 0)
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{
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printf("Error opening file: %d\n", outh);
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return;
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}
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memset(buffer,bval,100);
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do{
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i = sizeOfFile;
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if(i > 100) i = 100;
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sizeOfFile -= i;
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yaffs_write(outh,buffer,i);
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} while (sizeOfFile > 0);
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yaffs_close(outh);
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}
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void read_a_file(char *fn)
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{
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int h;
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int i = 0;
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unsigned char b;
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h = yaffs_open(fn, O_RDWR,0);
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if(h<0)
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{
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printf("File not found\n");
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return;
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}
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while(yaffs_read(h,&b,1)> 0)
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{
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printf("%02x ",b);
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i++;
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if(i > 32)
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{
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printf("\n");
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i = 0;;
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}
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}
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printf("\n");
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yaffs_close(h);
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}
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void cmd_yaffs_mount(char *mp)
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{
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yaffs_StartUp();
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int retval = yaffs_mount(mp);
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if( retval != -1)
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isMounted = 1;
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else
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printf("Error mounting %s, return value: %d\n", mp, yaffsfs_GetError());
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}
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static void checkMount(void)
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{
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if( !isMounted )
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{
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cmd_yaffs_mount(MOUNT_POINT);
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}
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}
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void cmd_yaffs_umount(char *mp)
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{
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checkMount();
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if( yaffs_unmount(mp) == -1)
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printf("Error umounting %s, return value: %d\n", mp, yaffsfs_GetError());
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}
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void cmd_yaffs_write_file(char *yaffsName,char bval,int sizeOfFile)
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{
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checkMount();
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make_a_file(yaffsName,bval,sizeOfFile);
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}
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void cmd_yaffs_read_file(char *fn)
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{
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checkMount();
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read_a_file(fn);
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}
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void cmd_yaffs_mread_file(char *fn, char *addr)
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{
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int h;
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struct yaffs_stat s;
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checkMount();
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yaffs_stat(fn,&s);
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printf ("Copy %s to 0x%08x... ", fn, addr);
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h = yaffs_open(fn, O_RDWR,0);
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if(h<0)
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{
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printf("File not found\n");
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return;
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}
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yaffs_read(h,addr,(int)s.st_size);
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printf("\t[DONE]\n");
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yaffs_close(h);
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}
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void cmd_yaffs_mwrite_file(char *fn, char *addr, int size)
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{
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int outh;
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checkMount();
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outh = yaffs_open(fn, O_CREAT | O_RDWR | O_TRUNC, S_IREAD | S_IWRITE);
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if (outh < 0)
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{
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printf("Error opening file: %d\n", outh);
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}
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yaffs_write(outh,addr,size);
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yaffs_close(outh);
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}
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void cmd_yaffs_ls(const char *mountpt, int longlist)
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{
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int i;
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yaffs_DIR *d;
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yaffs_dirent *de;
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struct yaffs_stat stat;
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char tempstr[255];
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checkMount();
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d = yaffs_opendir(mountpt);
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if(!d)
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{
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printf("opendir failed\n");
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}
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else
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{
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for(i = 0; (de = yaffs_readdir(d)) != NULL; i++)
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{
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if (longlist)
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{
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sprintf(tempstr, "%s/%s", mountpt, de->d_name);
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yaffs_stat(tempstr, &stat);
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printf("%-25s\t%7d\n",de->d_name, stat.st_size);
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}
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else
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{
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printf("%s\n",de->d_name);
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}
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}
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}
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}
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void cmd_yaffs_mkdir(const char *dir)
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{
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checkMount();
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int retval = yaffs_mkdir(dir, 0);
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if ( retval < 0)
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printf("yaffs_mkdir returning error: %d\n", retval);
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}
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void cmd_yaffs_rmdir(const char *dir)
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{
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checkMount();
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int retval = yaffs_rmdir(dir);
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if ( retval < 0)
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printf("yaffs_rmdir returning error: %d\n", retval);
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}
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void cmd_yaffs_rm(const char *path)
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{
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checkMount();
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int retval = yaffs_unlink(path);
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if ( retval < 0)
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printf("yaffs_unlink returning error: %d\n", retval);
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}
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void cmd_yaffs_mv(const char *oldPath, const char *newPath)
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{
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checkMount();
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int retval = yaffs_rename(newPath, oldPath);
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if ( retval < 0)
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printf("yaffs_unlink returning error: %d\n", retval);
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}
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